vssh: create directory for SSH backend code

2 files changed, 6052 insertions, 0 deletions

diff --git a/lib/vssh/libssh.c b/lib/vssh/libssh.c
new file mode 100644
index 000000000..4b34b0212
--- /dev/null
+++ b/lib/vssh/libssh.c
@@ -0,0 +1,2729 @@
+/***************************************************************************
+ *                                  _   _ ____  _
+ *  Project                     ___| | | |  _ \| |
+ *                             / __| | | | |_) | |
+ *                            | (__| |_| |  _ <| |___
+ *                             \___|\___/|_| \_\_____|
+ *
+ * Copyright (C) 2017 - 2019 Red Hat, Inc.
+ *
+ * Authors: Nikos Mavrogiannopoulos, Tomas Mraz, Stanislav Zidek,
+ *          Robert Kolcun, Andreas Schneider
+ *
+ * This software is licensed as described in the file COPYING, which
+ * you should have received as part of this distribution. The terms
+ * are also available at https://curl.haxx.se/docs/copyright.html.
+ *
+ * You may opt to use, copy, modify, merge, publish, distribute and/or sell
+ * copies of the Software, and permit persons to whom the Software is
+ * furnished to do so, under the terms of the COPYING file.
+ *
+ * This software is distributed on an "AS IS" basis, WITHOUT WARRANTY OF ANY
+ * KIND, either express or implied.
+ *
+ ***************************************************************************/
+
+#include "curl_setup.h"
+
+#ifdef USE_LIBSSH
+
+#include <limits.h>
+
+#include <libssh/libssh.h>
+#include <libssh/sftp.h>
+
+#ifdef HAVE_FCNTL_H
+#include <fcntl.h>
+#endif
+
+#ifdef HAVE_NETINET_IN_H
+#include <netinet/in.h>
+#endif
+#ifdef HAVE_ARPA_INET_H
+#include <arpa/inet.h>
+#endif
+#ifdef HAVE_UTSNAME_H
+#include <sys/utsname.h>
+#endif
+#ifdef HAVE_NETDB_H
+#include <netdb.h>
+#endif
+#ifdef __VMS
+#include <in.h>
+#include <inet.h>
+#endif
+
+#if (defined(NETWARE) && defined(__NOVELL_LIBC__))
+#undef in_addr_t
+#define in_addr_t unsigned long
+#endif
+
+#include <curl/curl.h>
+#include "urldata.h"
+#include "sendf.h"
+#include "hostip.h"
+#include "progress.h"
+#include "transfer.h"
+#include "escape.h"
+#include "http.h"               /* for HTTP proxy tunnel stuff */
+#include "ssh.h"
+#include "url.h"
+#include "speedcheck.h"
+#include "getinfo.h"
+#include "strdup.h"
+#include "strcase.h"
+#include "vtls/vtls.h"
+#include "connect.h"
+#include "strerror.h"
+#include "inet_ntop.h"
+#include "parsedate.h"          /* for the week day and month names */
+#include "sockaddr.h"           /* required for Curl_sockaddr_storage */
+#include "strtoofft.h"
+#include "multiif.h"
+#include "select.h"
+#include "warnless.h"
+
+/* for permission and open flags */
+#include <sys/types.h>
+#include <sys/stat.h>
+#include <unistd.h>
+#include <fcntl.h>
+
+/* The last 3 #include files should be in this order */
+#include "curl_printf.h"
+#include "curl_memory.h"
+#include "memdebug.h"
+#include "curl_path.h"
+
+/* A recent macro provided by libssh. Or make our own. */
+#ifndef SSH_STRING_FREE_CHAR
+/* !checksrc! disable ASSIGNWITHINCONDITION 1 */
+#define SSH_STRING_FREE_CHAR(x) \
+    do { if((x) != NULL) { ssh_string_free_char(x); x = NULL; } } while(0)
+#endif
+
+/* Local functions: */
+static CURLcode myssh_connect(struct connectdata *conn, bool *done);
+static CURLcode myssh_multi_statemach(struct connectdata *conn,
+                                      bool *done);
+static CURLcode myssh_do_it(struct connectdata *conn, bool *done);
+
+static CURLcode scp_done(struct connectdata *conn,
+                         CURLcode, bool premature);
+static CURLcode scp_doing(struct connectdata *conn, bool *dophase_done);
+static CURLcode scp_disconnect(struct connectdata *conn,
+                               bool dead_connection);
+
+static CURLcode sftp_done(struct connectdata *conn,
+                          CURLcode, bool premature);
+static CURLcode sftp_doing(struct connectdata *conn,
+                           bool *dophase_done);
+static CURLcode sftp_disconnect(struct connectdata *conn, bool dead);
+static
+CURLcode sftp_perform(struct connectdata *conn,
+                      bool *connected,
+                      bool *dophase_done);
+
+static void sftp_quote(struct connectdata *conn);
+static void sftp_quote_stat(struct connectdata *conn);
+static int myssh_getsock(struct connectdata *conn, curl_socket_t *sock);
+static int myssh_perform_getsock(const struct connectdata *conn,
+                                 curl_socket_t *sock);
+
+static CURLcode myssh_setup_connection(struct connectdata *conn);
+
+/*
+ * SCP protocol handler.
+ */
+
+const struct Curl_handler Curl_handler_scp = {
+  "SCP",                        /* scheme */
+  myssh_setup_connection,       /* setup_connection */
+  myssh_do_it,                  /* do_it */
+  scp_done,                     /* done */
+  ZERO_NULL,                    /* do_more */
+  myssh_connect,                /* connect_it */
+  myssh_multi_statemach,        /* connecting */
+  scp_doing,                    /* doing */
+  myssh_getsock,                /* proto_getsock */
+  myssh_getsock,                /* doing_getsock */
+  ZERO_NULL,                    /* domore_getsock */
+  myssh_perform_getsock,        /* perform_getsock */
+  scp_disconnect,               /* disconnect */
+  ZERO_NULL,                    /* readwrite */
+  ZERO_NULL,                    /* connection_check */
+  PORT_SSH,                     /* defport */
+  CURLPROTO_SCP,                /* protocol */
+  PROTOPT_DIRLOCK | PROTOPT_CLOSEACTION | PROTOPT_NOURLQUERY    /* flags */
+};
+
+/*
+ * SFTP protocol handler.
+ */
+
+const struct Curl_handler Curl_handler_sftp = {
+  "SFTP",                               /* scheme */
+  myssh_setup_connection,               /* setup_connection */
+  myssh_do_it,                          /* do_it */
+  sftp_done,                            /* done */
+  ZERO_NULL,                            /* do_more */
+  myssh_connect,                        /* connect_it */
+  myssh_multi_statemach,                /* connecting */
+  sftp_doing,                           /* doing */
+  myssh_getsock,                        /* proto_getsock */
+  myssh_getsock,                        /* doing_getsock */
+  ZERO_NULL,                            /* domore_getsock */
+  myssh_perform_getsock,                /* perform_getsock */
+  sftp_disconnect,                      /* disconnect */
+  ZERO_NULL,                            /* readwrite */
+  ZERO_NULL,                            /* connection_check */
+  PORT_SSH,                             /* defport */
+  CURLPROTO_SFTP,                       /* protocol */
+  PROTOPT_DIRLOCK | PROTOPT_CLOSEACTION
+  | PROTOPT_NOURLQUERY                  /* flags */
+};
+
+static CURLcode sftp_error_to_CURLE(int err)
+{
+  switch(err) {
+    case SSH_FX_OK:
+      return CURLE_OK;
+
+    case SSH_FX_NO_SUCH_FILE:
+    case SSH_FX_NO_SUCH_PATH:
+      return CURLE_REMOTE_FILE_NOT_FOUND;
+
+    case SSH_FX_PERMISSION_DENIED:
+    case SSH_FX_WRITE_PROTECT:
+      return CURLE_REMOTE_ACCESS_DENIED;
+
+    case SSH_FX_FILE_ALREADY_EXISTS:
+      return CURLE_REMOTE_FILE_EXISTS;
+
+    default:
+      break;
+  }
+
+  return CURLE_SSH;
+}
+
+#ifndef DEBUGBUILD
+#define state(x,y) mystate(x,y)
+#else
+#define state(x,y) mystate(x,y, __LINE__)
+#endif
+
+/*
+ * SSH State machine related code
+ */
+/* This is the ONLY way to change SSH state! */
+static void mystate(struct connectdata *conn, sshstate nowstate
+#ifdef DEBUGBUILD
+                    , int lineno
+#endif
+  )
+{
+  struct ssh_conn *sshc = &conn->proto.sshc;
+#if defined(DEBUGBUILD) && !defined(CURL_DISABLE_VERBOSE_STRINGS)
+  /* for debug purposes */
+  static const char *const names[] = {
+    "SSH_STOP",
+    "SSH_INIT",
+    "SSH_S_STARTUP",
+    "SSH_HOSTKEY",
+    "SSH_AUTHLIST",
+    "SSH_AUTH_PKEY_INIT",
+    "SSH_AUTH_PKEY",
+    "SSH_AUTH_PASS_INIT",
+    "SSH_AUTH_PASS",
+    "SSH_AUTH_AGENT_INIT",
+    "SSH_AUTH_AGENT_LIST",
+    "SSH_AUTH_AGENT",
+    "SSH_AUTH_HOST_INIT",
+    "SSH_AUTH_HOST",
+    "SSH_AUTH_KEY_INIT",
+    "SSH_AUTH_KEY",
+    "SSH_AUTH_GSSAPI",
+    "SSH_AUTH_DONE",
+    "SSH_SFTP_INIT",
+    "SSH_SFTP_REALPATH",
+    "SSH_SFTP_QUOTE_INIT",
+    "SSH_SFTP_POSTQUOTE_INIT",
+    "SSH_SFTP_QUOTE",
+    "SSH_SFTP_NEXT_QUOTE",
+    "SSH_SFTP_QUOTE_STAT",
+    "SSH_SFTP_QUOTE_SETSTAT",
+    "SSH_SFTP_QUOTE_SYMLINK",
+    "SSH_SFTP_QUOTE_MKDIR",
+    "SSH_SFTP_QUOTE_RENAME",
+    "SSH_SFTP_QUOTE_RMDIR",
+    "SSH_SFTP_QUOTE_UNLINK",
+    "SSH_SFTP_QUOTE_STATVFS",
+    "SSH_SFTP_GETINFO",
+    "SSH_SFTP_FILETIME",
+    "SSH_SFTP_TRANS_INIT",
+    "SSH_SFTP_UPLOAD_INIT",
+    "SSH_SFTP_CREATE_DIRS_INIT",
+    "SSH_SFTP_CREATE_DIRS",
+    "SSH_SFTP_CREATE_DIRS_MKDIR",
+    "SSH_SFTP_READDIR_INIT",
+    "SSH_SFTP_READDIR",
+    "SSH_SFTP_READDIR_LINK",
+    "SSH_SFTP_READDIR_BOTTOM",
+    "SSH_SFTP_READDIR_DONE",
+    "SSH_SFTP_DOWNLOAD_INIT",
+    "SSH_SFTP_DOWNLOAD_STAT",
+    "SSH_SFTP_CLOSE",
+    "SSH_SFTP_SHUTDOWN",
+    "SSH_SCP_TRANS_INIT",
+    "SSH_SCP_UPLOAD_INIT",
+    "SSH_SCP_DOWNLOAD_INIT",
+    "SSH_SCP_DOWNLOAD",
+    "SSH_SCP_DONE",
+    "SSH_SCP_SEND_EOF",
+    "SSH_SCP_WAIT_EOF",
+    "SSH_SCP_WAIT_CLOSE",
+    "SSH_SCP_CHANNEL_FREE",
+    "SSH_SESSION_DISCONNECT",
+    "SSH_SESSION_FREE",
+    "QUIT"
+  };
+
+
+  if(sshc->state != nowstate) {
+    infof(conn->data, "SSH %p state change from %s to %s (line %d)\n",
+          (void *) sshc, names[sshc->state], names[nowstate],
+          lineno);
+  }
+#endif
+
+  sshc->state = nowstate;
+}
+
+/* Multiple options:
+ * 1. data->set.str[STRING_SSH_HOST_PUBLIC_KEY_MD5] is set with an MD5
+ *    hash (90s style auth, not sure we should have it here)
+ * 2. data->set.ssh_keyfunc callback is set. Then we do trust on first
+ *    use. We even save on knownhosts if CURLKHSTAT_FINE_ADD_TO_FILE
+ *    is returned by it.
+ * 3. none of the above. We only accept if it is present on known hosts.
+ *
+ * Returns SSH_OK or SSH_ERROR.
+ */
+static int myssh_is_known(struct connectdata *conn)
+{
+  int rc;
+  struct Curl_easy *data = conn->data;
+  struct ssh_conn *sshc = &conn->proto.sshc;
+  ssh_key pubkey;
+  size_t hlen;
+  unsigned char *hash = NULL;
+  char *base64 = NULL;
+  int vstate;
+  enum curl_khmatch keymatch;
+  struct curl_khkey foundkey;
+  curl_sshkeycallback func =
+    data->set.ssh_keyfunc;
+
+  rc = ssh_get_publickey(sshc->ssh_session, &pubkey);
+  if(rc != SSH_OK)
+    return rc;
+
+  if(data->set.str[STRING_SSH_HOST_PUBLIC_KEY_MD5]) {
+    rc = ssh_get_publickey_hash(pubkey, SSH_PUBLICKEY_HASH_MD5,
+                                &hash, &hlen);
+    if(rc != SSH_OK)
+      goto cleanup;
+
+    if(hlen != strlen(data->set.str[STRING_SSH_HOST_PUBLIC_KEY_MD5]) ||
+       memcmp(&data->set.str[STRING_SSH_HOST_PUBLIC_KEY_MD5], hash, hlen)) {
+      rc = SSH_ERROR;
+      goto cleanup;
+    }
+
+    rc = SSH_OK;
+    goto cleanup;
+  }
+
+  if(data->set.ssl.primary.verifyhost != TRUE) {
+    rc = SSH_OK;
+    goto cleanup;
+  }
+
+  vstate = ssh_is_server_known(sshc->ssh_session);
+  switch(vstate) {
+    case SSH_SERVER_KNOWN_OK:
+      keymatch = CURLKHMATCH_OK;
+      break;
+    case SSH_SERVER_FILE_NOT_FOUND:
+      /* fallthrough */
+    case SSH_SERVER_NOT_KNOWN:
+      keymatch = CURLKHMATCH_MISSING;
+      break;
+  default:
+      keymatch = CURLKHMATCH_MISMATCH;
+      break;
+  }
+
+  if(func) { /* use callback to determine action */
+    rc = ssh_pki_export_pubkey_base64(pubkey, &base64);
+    if(rc != SSH_OK)
+      goto cleanup;
+
+    foundkey.key = base64;
+    foundkey.len = strlen(base64);
+
+    switch(ssh_key_type(pubkey)) {
+      case SSH_KEYTYPE_RSA:
+        foundkey.keytype = CURLKHTYPE_RSA;
+        break;
+      case SSH_KEYTYPE_RSA1:
+        foundkey.keytype = CURLKHTYPE_RSA1;
+        break;
+      case SSH_KEYTYPE_ECDSA:
+        foundkey.keytype = CURLKHTYPE_ECDSA;
+        break;
+#if LIBSSH_VERSION_INT >= SSH_VERSION_INT(0,7,0)
+      case SSH_KEYTYPE_ED25519:
+        foundkey.keytype = CURLKHTYPE_ED25519;
+        break;
+#endif
+      case SSH_KEYTYPE_DSS:
+        foundkey.keytype = CURLKHTYPE_DSS;
+        break;
+      default:
+        rc = SSH_ERROR;
+        goto cleanup;
+    }
+
+    /* we don't have anything equivalent to knownkey. Always NULL */
+    Curl_set_in_callback(data, true);
+    rc = func(data, NULL, &foundkey, /* from the remote host */
+              keymatch, data->set.ssh_keyfunc_userp);
+    Curl_set_in_callback(data, false);
+
+    switch(rc) {
+      case CURLKHSTAT_FINE_ADD_TO_FILE:
+        rc = ssh_write_knownhost(sshc->ssh_session);
+        if(rc != SSH_OK) {
+          goto cleanup;
+        }
+        break;
+      case CURLKHSTAT_FINE:
+        break;
+      default: /* REJECT/DEFER */
+        rc = SSH_ERROR;
+        goto cleanup;
+    }
+  }
+  else {
+    if(keymatch != CURLKHMATCH_OK) {
+      rc = SSH_ERROR;
+      goto cleanup;
+    }
+  }
+  rc = SSH_OK;
+
+cleanup:
+  if(hash)
+    ssh_clean_pubkey_hash(&hash);
+  ssh_key_free(pubkey);
+  return rc;
+}
+
+#define MOVE_TO_ERROR_STATE(_r) { \
+  state(conn, SSH_SESSION_DISCONNECT); \
+  sshc->actualcode = _r; \
+  rc = SSH_ERROR; \
+  break; \
+}
+
+#define MOVE_TO_SFTP_CLOSE_STATE() { \
+  state(conn, SSH_SFTP_CLOSE); \
+  sshc->actualcode = sftp_error_to_CURLE(sftp_get_error(sshc->sftp_session)); \
+  rc = SSH_ERROR; \
+  break; \
+}
+
+#define MOVE_TO_LAST_AUTH \
+  if(sshc->auth_methods & SSH_AUTH_METHOD_PASSWORD) { \
+    rc = SSH_OK; \
+    state(conn, SSH_AUTH_PASS_INIT); \
+    break; \
+  } \
+  else { \
+    MOVE_TO_ERROR_STATE(CURLE_LOGIN_DENIED); \
+  }
+
+#define MOVE_TO_TERTIARY_AUTH \
+  if(sshc->auth_methods & SSH_AUTH_METHOD_INTERACTIVE) { \
+    rc = SSH_OK; \
+    state(conn, SSH_AUTH_KEY_INIT); \
+    break; \
+  } \
+  else { \
+    MOVE_TO_LAST_AUTH; \
+  }
+
+#define MOVE_TO_SECONDARY_AUTH \
+  if(sshc->auth_methods & SSH_AUTH_METHOD_GSSAPI_MIC) { \
+    rc = SSH_OK; \
+    state(conn, SSH_AUTH_GSSAPI); \
+    break; \
+  } \
+  else { \
+    MOVE_TO_TERTIARY_AUTH; \
+  }
+
+static
+int myssh_auth_interactive(struct connectdata *conn)
+{
+  int rc;
+  struct ssh_conn *sshc = &conn->proto.sshc;
+  int nprompts;
+
+restart:
+  switch(sshc->kbd_state) {
+    case 0:
+      rc = ssh_userauth_kbdint(sshc->ssh_session, NULL, NULL);
+      if(rc == SSH_AUTH_AGAIN)
+        return SSH_AGAIN;
+
+      if(rc != SSH_AUTH_INFO)
+        return SSH_ERROR;
+
+      nprompts = ssh_userauth_kbdint_getnprompts(sshc->ssh_session);
+      if(nprompts == SSH_ERROR || nprompts != 1)
+        return SSH_ERROR;
+
+      rc = ssh_userauth_kbdint_setanswer(sshc->ssh_session, 0, conn->passwd);
+      if(rc < 0)
+        return SSH_ERROR;
+
+    /* FALLTHROUGH */
+    case 1:
+      sshc->kbd_state = 1;
+
+      rc = ssh_userauth_kbdint(sshc->ssh_session, NULL, NULL);
+      if(rc == SSH_AUTH_AGAIN)
+        return SSH_AGAIN;
+      else if(rc == SSH_AUTH_SUCCESS)
+        rc = SSH_OK;
+      else if(rc == SSH_AUTH_INFO) {
+        nprompts = ssh_userauth_kbdint_getnprompts(sshc->ssh_session);
+        if(nprompts != 0)
+          return SSH_ERROR;
+
+        sshc->kbd_state = 2;
+        goto restart;
+      }
+      else
+        rc = SSH_ERROR;
+      break;
+    case 2:
+      sshc->kbd_state = 2;
+
+      rc = ssh_userauth_kbdint(sshc->ssh_session, NULL, NULL);
+      if(rc == SSH_AUTH_AGAIN)
+        return SSH_AGAIN;
+      else if(rc == SSH_AUTH_SUCCESS)
+        rc = SSH_OK;
+      else
+        rc = SSH_ERROR;
+
+      break;
+    default:
+      return SSH_ERROR;
+  }
+
+  sshc->kbd_state = 0;
+  return rc;
+}
+
+/*
+ * ssh_statemach_act() runs the SSH state machine as far as it can without
+ * blocking and without reaching the end.  The data the pointer 'block' points
+ * to will be set to TRUE if the libssh function returns SSH_AGAIN
+ * meaning it wants to be called again when the socket is ready
+ */
+static CURLcode myssh_statemach_act(struct connectdata *conn, bool *block)
+{
+  CURLcode result = CURLE_OK;
+  struct Curl_easy *data = conn->data;
+  struct SSHPROTO *protop = data->req.protop;
+  struct ssh_conn *sshc = &conn->proto.sshc;
+  curl_socket_t sock = conn->sock[FIRSTSOCKET];
+  int rc = SSH_NO_ERROR, err;
+  char *new_readdir_line;
+  int seekerr = CURL_SEEKFUNC_OK;
+  const char *err_msg;
+  *block = 0;                   /* we're not blocking by default */
+
+  do {
+
+    switch(sshc->state) {
+    case SSH_INIT:
+      sshc->secondCreateDirs = 0;
+      sshc->nextstate = SSH_NO_STATE;
+      sshc->actualcode = CURLE_OK;
+
+#if 0
+      ssh_set_log_level(SSH_LOG_PROTOCOL);
+#endif
+
+      /* Set libssh to non-blocking, since everything internally is
+         non-blocking */
+      ssh_set_blocking(sshc->ssh_session, 0);
+
+      state(conn, SSH_S_STARTUP);
+      /* FALLTHROUGH */
+
+    case SSH_S_STARTUP:
+      rc = ssh_connect(sshc->ssh_session);
+      if(rc == SSH_AGAIN)
+        break;
+
+      if(rc != SSH_OK) {
+        failf(data, "Failure establishing ssh session");
+        MOVE_TO_ERROR_STATE(CURLE_FAILED_INIT);
+      }
+
+      state(conn, SSH_HOSTKEY);
+
+      /* FALLTHROUGH */
+    case SSH_HOSTKEY:
+
+      rc = myssh_is_known(conn);
+      if(rc != SSH_OK) {
+        MOVE_TO_ERROR_STATE(CURLE_PEER_FAILED_VERIFICATION);
+      }
+
+      state(conn, SSH_AUTHLIST);
+      /* FALLTHROUGH */
+    case SSH_AUTHLIST:{
+        sshc->authed = FALSE;
+
+        rc = ssh_userauth_none(sshc->ssh_session, NULL);
+        if(rc == SSH_AUTH_AGAIN) {
+          rc = SSH_AGAIN;
+          break;
+        }
+
+        if(rc == SSH_AUTH_SUCCESS) {
+          sshc->authed = TRUE;
+          infof(data, "Authenticated with none\n");
+          state(conn, SSH_AUTH_DONE);
+          break;
+        }
+        else if(rc == SSH_AUTH_ERROR) {
+          MOVE_TO_ERROR_STATE(CURLE_LOGIN_DENIED);
+        }
+
+        sshc->auth_methods = ssh_userauth_list(sshc->ssh_session, NULL);
+        if(sshc->auth_methods & SSH_AUTH_METHOD_PUBLICKEY) {
+          state(conn, SSH_AUTH_PKEY_INIT);
+          infof(data, "Authentication using SSH public key file\n");
+        }
+        else if(sshc->auth_methods & SSH_AUTH_METHOD_GSSAPI_MIC) {
+          state(conn, SSH_AUTH_GSSAPI);
+        }
+        else if(sshc->auth_methods & SSH_AUTH_METHOD_INTERACTIVE) {
+          state(conn, SSH_AUTH_KEY_INIT);
+        }
+        else if(sshc->auth_methods & SSH_AUTH_METHOD_PASSWORD) {
+          state(conn, SSH_AUTH_PASS_INIT);
+        }
+        else {                  /* unsupported authentication method */
+          MOVE_TO_ERROR_STATE(CURLE_LOGIN_DENIED);
+        }
+
+        break;
+      }
+    case SSH_AUTH_PKEY_INIT:
+      if(!(data->set.ssh_auth_types & CURLSSH_AUTH_PUBLICKEY)) {
+        MOVE_TO_SECONDARY_AUTH;
+      }
+
+      /* Two choices, (1) private key was given on CMD,
+       * (2) use the "default" keys. */
+      if(data->set.str[STRING_SSH_PRIVATE_KEY]) {
+        if(sshc->pubkey && !data->set.ssl.key_passwd) {
+          rc = ssh_userauth_try_publickey(sshc->ssh_session, NULL,
+                                          sshc->pubkey);
+          if(rc == SSH_AUTH_AGAIN) {
+            rc = SSH_AGAIN;
+            break;
+          }
+
+          if(rc != SSH_OK) {
+            MOVE_TO_SECONDARY_AUTH;
+          }
+        }
+
+        rc = ssh_pki_import_privkey_file(data->
+                                         set.str[STRING_SSH_PRIVATE_KEY],
+                                         data->set.ssl.key_passwd, NULL,
+                                         NULL, &sshc->privkey);
+        if(rc != SSH_OK) {
+          failf(data, "Could not load private key file %s",
+                data->set.str[STRING_SSH_PRIVATE_KEY]);
+          MOVE_TO_ERROR_STATE(CURLE_LOGIN_DENIED);
+          break;
+        }
+
+        state(conn, SSH_AUTH_PKEY);
+        break;
+
+      }
+      else {
+        rc = ssh_userauth_publickey_auto(sshc->ssh_session, NULL,
+                                         data->set.ssl.key_passwd);
+        if(rc == SSH_AUTH_AGAIN) {
+          rc = SSH_AGAIN;
+          break;
+        }
+        if(rc == SSH_AUTH_SUCCESS) {
+          rc = SSH_OK;
+          sshc->authed = TRUE;
+          infof(data, "Completed public key authentication\n");
+          state(conn, SSH_AUTH_DONE);
+          break;
+        }
+
+        MOVE_TO_SECONDARY_AUTH;
+      }
+      break;
+    case SSH_AUTH_PKEY:
+      rc = ssh_userauth_publickey(sshc->ssh_session, NULL, sshc->privkey);
+      if(rc == SSH_AUTH_AGAIN) {
+        rc = SSH_AGAIN;
+        break;
+      }
+
+      if(rc == SSH_AUTH_SUCCESS) {
+        sshc->authed = TRUE;
+        infof(data, "Completed public key authentication\n");
+        state(conn, SSH_AUTH_DONE);
+        break;
+      }
+      else {
+        infof(data, "Failed public key authentication (rc: %d)\n", rc);
+        MOVE_TO_SECONDARY_AUTH;
+      }
+      break;
+
+    case SSH_AUTH_GSSAPI:
+      if(!(data->set.ssh_auth_types & CURLSSH_AUTH_GSSAPI)) {
+        MOVE_TO_TERTIARY_AUTH;
+      }
+
+      rc = ssh_userauth_gssapi(sshc->ssh_session);
+      if(rc == SSH_AUTH_AGAIN) {
+        rc = SSH_AGAIN;
+        break;
+      }
+
+      if(rc == SSH_AUTH_SUCCESS) {
+        rc = SSH_OK;
+        sshc->authed = TRUE;
+        infof(data, "Completed gssapi authentication\n");
+        state(conn, SSH_AUTH_DONE);
+        break;
+      }
+
+      MOVE_TO_TERTIARY_AUTH;
+      break;
+
+    case SSH_AUTH_KEY_INIT:
+      if(data->set.ssh_auth_types & CURLSSH_AUTH_KEYBOARD) {
+        state(conn, SSH_AUTH_KEY);
+      }
+      else {
+        MOVE_TO_LAST_AUTH;
+      }
+      break;
+
+    case SSH_AUTH_KEY:
+
+      /* Authentication failed. Continue with keyboard-interactive now. */
+      rc = myssh_auth_interactive(conn);
+      if(rc == SSH_AGAIN) {
+        break;
+      }
+      if(rc == SSH_OK) {
+        sshc->authed = TRUE;
+        infof(data, "completed keyboard interactive authentication\n");
+      }
+      state(conn, SSH_AUTH_DONE);
+      break;
+
+    case SSH_AUTH_PASS_INIT:
+      if(!(data->set.ssh_auth_types & CURLSSH_AUTH_PASSWORD)) {
+        /* Host key authentication is intentionally not implemented */
+        MOVE_TO_ERROR_STATE(CURLE_LOGIN_DENIED);
+      }
+      state(conn, SSH_AUTH_PASS);
+      /* FALLTHROUGH */
+
+    case SSH_AUTH_PASS:
+      rc = ssh_userauth_password(sshc->ssh_session, NULL, conn->passwd);
+      if(rc == SSH_AUTH_AGAIN) {
+        rc = SSH_AGAIN;
+        break;
+      }
+
+      if(rc == SSH_AUTH_SUCCESS) {
+        sshc->authed = TRUE;
+        infof(data, "Completed password authentication\n");
+        state(conn, SSH_AUTH_DONE);
+      }
+      else {
+        MOVE_TO_ERROR_STATE(CURLE_LOGIN_DENIED);
+      }
+      break;
+
+    case SSH_AUTH_DONE:
+      if(!sshc->authed) {
+        failf(data, "Authentication failure");
+        MOVE_TO_ERROR_STATE(CURLE_LOGIN_DENIED);
+        break;
+      }
+
+      /*
+       * At this point we have an authenticated ssh session.
+       */
+      infof(data, "Authentication complete\n");
+
+      Curl_pgrsTime(conn->data, TIMER_APPCONNECT);      /* SSH is connected */
+
+      conn->sockfd = sock;
+      conn->writesockfd = CURL_SOCKET_BAD;
+
+      if(conn->handler->protocol == CURLPROTO_SFTP) {
+        state(conn, SSH_SFTP_INIT);
+        break;
+      }
+      infof(data, "SSH CONNECT phase done\n");
+      state(conn, SSH_STOP);
+      break;
+
+    case SSH_SFTP_INIT:
+      ssh_set_blocking(sshc->ssh_session, 1);
+
+      sshc->sftp_session = sftp_new(sshc->ssh_session);
+      if(!sshc->sftp_session) {
+        failf(data, "Failure initializing sftp session: %s",
+              ssh_get_error(sshc->ssh_session));
+        MOVE_TO_ERROR_STATE(CURLE_COULDNT_CONNECT);
+        break;
+      }
+
+      rc = sftp_init(sshc->sftp_session);
+      if(rc != SSH_OK) {
+        rc = sftp_get_error(sshc->sftp_session);
+        failf(data, "Failure initializing sftp session: %s",
+              ssh_get_error(sshc->ssh_session));
+        MOVE_TO_ERROR_STATE(sftp_error_to_CURLE(rc));
+        break;
+      }
+      state(conn, SSH_SFTP_REALPATH);
+      /* FALLTHROUGH */
+    case SSH_SFTP_REALPATH:
+      /*
+       * Get the "home" directory
+       */
+      sshc->homedir = sftp_canonicalize_path(sshc->sftp_session, ".");
+      if(sshc->homedir == NULL) {
+        MOVE_TO_ERROR_STATE(CURLE_COULDNT_CONNECT);
+      }
+      conn->data->state.most_recent_ftp_entrypath = sshc->homedir;
+
+      /* This is the last step in the SFTP connect phase. Do note that while
+         we get the homedir here, we get the "workingpath" in the DO action
+         since the homedir will remain the same between request but the
+         working path will not. */
+      DEBUGF(infof(data, "SSH CONNECT phase done\n"));
+      state(conn, SSH_STOP);
+      break;
+
+    case SSH_SFTP_QUOTE_INIT:
+
+      result = Curl_getworkingpath(conn, sshc->homedir, &protop->path);
+      if(result) {
+        sshc->actualcode = result;
+        state(conn, SSH_STOP);
+        break;
+      }
+
+      if(data->set.quote) {
+        infof(data, "Sending quote commands\n");
+        sshc->quote_item = data->set.quote;
+        state(conn, SSH_SFTP_QUOTE);
+      }
+      else {
+        state(conn, SSH_SFTP_GETINFO);
+      }
+      break;
+
+    case SSH_SFTP_POSTQUOTE_INIT:
+      if(data->set.postquote) {
+        infof(data, "Sending quote commands\n");
+        sshc->quote_item = data->set.postquote;
+        state(conn, SSH_SFTP_QUOTE);
+      }
+      else {
+        state(conn, SSH_STOP);
+      }
+      break;
+
+    case SSH_SFTP_QUOTE:
+      /* Send any quote commands */
+      sftp_quote(conn);
+      break;
+
+    case SSH_SFTP_NEXT_QUOTE:
+      Curl_safefree(sshc->quote_path1);
+      Curl_safefree(sshc->quote_path2);
+
+      sshc->quote_item = sshc->quote_item->next;
+
+      if(sshc->quote_item) {
+        state(conn, SSH_SFTP_QUOTE);
+      }
+      else {
+        if(sshc->nextstate != SSH_NO_STATE) {
+          state(conn, sshc->nextstate);
+          sshc->nextstate = SSH_NO_STATE;
+        }
+        else {
+          state(conn, SSH_SFTP_GETINFO);
+        }
+      }
+      break;
+
+    case SSH_SFTP_QUOTE_STAT:
+      sftp_quote_stat(conn);
+      break;
+
+    case SSH_SFTP_QUOTE_SETSTAT:
+      rc = sftp_setstat(sshc->sftp_session, sshc->quote_path2,
+                        sshc->quote_attrs);
+      if(rc != 0 && !sshc->acceptfail) {
+        Curl_safefree(sshc->quote_path1);
+        Curl_safefree(sshc->quote_path2);
+        failf(data, "Attempt to set SFTP stats failed: %s",
+              ssh_get_error(sshc->ssh_session));
+        state(conn, SSH_SFTP_CLOSE);
+        sshc->nextstate = SSH_NO_STATE;
+        sshc->actualcode = CURLE_QUOTE_ERROR;
+        /* sshc->actualcode = sftp_error_to_CURLE(err);
+         * we do not send the actual error; we return
+         * the error the libssh2 backend is returning */
+        break;
+      }
+      state(conn, SSH_SFTP_NEXT_QUOTE);
+      break;
+
+    case SSH_SFTP_QUOTE_SYMLINK:
+      rc = sftp_symlink(sshc->sftp_session, sshc->quote_path2,
+                        sshc->quote_path1);
+      if(rc != 0 && !sshc->acceptfail) {
+        Curl_safefree(sshc->quote_path1);
+        Curl_safefree(sshc->quote_path2);
+        failf(data, "symlink command failed: %s",
+              ssh_get_error(sshc->ssh_session));
+        state(conn, SSH_SFTP_CLOSE);
+        sshc->nextstate = SSH_NO_STATE;
+        sshc->actualcode = CURLE_QUOTE_ERROR;
+        break;
+      }
+      state(conn, SSH_SFTP_NEXT_QUOTE);
+      break;
+
+    case SSH_SFTP_QUOTE_MKDIR:
+      rc = sftp_mkdir(sshc->sftp_session, sshc->quote_path1,
+                      (mode_t)data->set.new_directory_perms);
+      if(rc != 0 && !sshc->acceptfail) {
+        Curl_safefree(sshc->quote_path1);
+        failf(data, "mkdir command failed: %s",
+              ssh_get_error(sshc->ssh_session));
+        state(conn, SSH_SFTP_CLOSE);
+        sshc->nextstate = SSH_NO_STATE;
+        sshc->actualcode = CURLE_QUOTE_ERROR;
+        break;
+      }
+      state(conn, SSH_SFTP_NEXT_QUOTE);
+      break;
+
+    case SSH_SFTP_QUOTE_RENAME:
+      rc = sftp_rename(sshc->sftp_session, sshc->quote_path1,
+                       sshc->quote_path2);
+      if(rc != 0 && !sshc->acceptfail) {
+        Curl_safefree(sshc->quote_path1);
+        Curl_safefree(sshc->quote_path2);
+        failf(data, "rename command failed: %s",
+              ssh_get_error(sshc->ssh_session));
+        state(conn, SSH_SFTP_CLOSE);
+        sshc->nextstate = SSH_NO_STATE;
+        sshc->actualcode = CURLE_QUOTE_ERROR;
+        break;
+      }
+      state(conn, SSH_SFTP_NEXT_QUOTE);
+      break;
+
+    case SSH_SFTP_QUOTE_RMDIR:
+      rc = sftp_rmdir(sshc->sftp_session, sshc->quote_path1);
+      if(rc != 0 && !sshc->acceptfail) {
+        Curl_safefree(sshc->quote_path1);
+        failf(data, "rmdir command failed: %s",
+              ssh_get_error(sshc->ssh_session));
+        state(conn, SSH_SFTP_CLOSE);
+        sshc->nextstate = SSH_NO_STATE;
+        sshc->actualcode = CURLE_QUOTE_ERROR;
+        break;
+      }
+      state(conn, SSH_SFTP_NEXT_QUOTE);
+      break;
+
+    case SSH_SFTP_QUOTE_UNLINK:
+      rc = sftp_unlink(sshc->sftp_session, sshc->quote_path1);
+      if(rc != 0 && !sshc->acceptfail) {
+        Curl_safefree(sshc->quote_path1);
+        failf(data, "rm command failed: %s",
+              ssh_get_error(sshc->ssh_session));
+        state(conn, SSH_SFTP_CLOSE);
+        sshc->nextstate = SSH_NO_STATE;
+        sshc->actualcode = CURLE_QUOTE_ERROR;
+        break;
+      }
+      state(conn, SSH_SFTP_NEXT_QUOTE);
+      break;
+
+    case SSH_SFTP_QUOTE_STATVFS:
+    {
+      sftp_statvfs_t statvfs;
+
+      statvfs = sftp_statvfs(sshc->sftp_session, sshc->quote_path1);
+      if(!statvfs && !sshc->acceptfail) {
+        Curl_safefree(sshc->quote_path1);
+        failf(data, "statvfs command failed: %s",
+              ssh_get_error(sshc->ssh_session));
+        state(conn, SSH_SFTP_CLOSE);
+        sshc->nextstate = SSH_NO_STATE;
+        sshc->actualcode = CURLE_QUOTE_ERROR;
+        break;
+      }
+      else if(statvfs) {
+        char *tmp = aprintf("statvfs:\n"
+                            "f_bsize: %llu\n" "f_frsize: %llu\n"
+                            "f_blocks: %llu\n" "f_bfree: %llu\n"
+                            "f_bavail: %llu\n" "f_files: %llu\n"
+                            "f_ffree: %llu\n" "f_favail: %llu\n"
+                            "f_fsid: %llu\n" "f_flag: %llu\n"
+                            "f_namemax: %llu\n",
+                            statvfs->f_bsize, statvfs->f_frsize,
+                            statvfs->f_blocks, statvfs->f_bfree,
+                            statvfs->f_bavail, statvfs->f_files,
+                            statvfs->f_ffree, statvfs->f_favail,
+                            statvfs->f_fsid, statvfs->f_flag,
+                            statvfs->f_namemax);
+        sftp_statvfs_free(statvfs);
+
+        if(!tmp) {
+          result = CURLE_OUT_OF_MEMORY;
+          state(conn, SSH_SFTP_CLOSE);
+          sshc->nextstate = SSH_NO_STATE;
+          break;
+        }
+
+        result = Curl_client_write(conn, CLIENTWRITE_HEADER, tmp, strlen(tmp));
+        free(tmp);
+        if(result) {
+          state(conn, SSH_SFTP_CLOSE);
+          sshc->nextstate = SSH_NO_STATE;
+          sshc->actualcode = result;
+        }
+      }
+      state(conn, SSH_SFTP_NEXT_QUOTE);
+      break;
+    }
+
+    case SSH_SFTP_GETINFO:
+      if(data->set.get_filetime) {
+        state(conn, SSH_SFTP_FILETIME);
+      }
+      else {
+        state(conn, SSH_SFTP_TRANS_INIT);
+      }
+      break;
+
+    case SSH_SFTP_FILETIME:
+    {
+      sftp_attributes attrs;
+
+      attrs = sftp_stat(sshc->sftp_session, protop->path);
+      if(attrs != 0) {
+        data->info.filetime = attrs->mtime;
+        sftp_attributes_free(attrs);
+      }
+
+      state(conn, SSH_SFTP_TRANS_INIT);
+      break;
+    }
+
+    case SSH_SFTP_TRANS_INIT:
+      if(data->set.upload)
+        state(conn, SSH_SFTP_UPLOAD_INIT);
+      else {
+        if(protop->path[strlen(protop->path)-1] == '/')
+          state(conn, SSH_SFTP_READDIR_INIT);
+        else
+          state(conn, SSH_SFTP_DOWNLOAD_INIT);
+      }
+      break;
+
+    case SSH_SFTP_UPLOAD_INIT:
+    {
+      int flags;
+
+      if(data->state.resume_from != 0) {
+        sftp_attributes attrs;
+
+        if(data->state.resume_from < 0) {
+          attrs = sftp_stat(sshc->sftp_session, protop->path);
+          if(attrs != 0) {
+            curl_off_t size = attrs->size;
+            if(size < 0) {
+              failf(data, "Bad file size (%" CURL_FORMAT_CURL_OFF_T ")", size);
+              MOVE_TO_ERROR_STATE(CURLE_BAD_DOWNLOAD_RESUME);
+            }
+            data->state.resume_from = attrs->size;
+
+            sftp_attributes_free(attrs);
+          }
+          else {
+            data->state.resume_from = 0;
+          }
+        }
+      }
+
+      if(data->set.ftp_append)
+        /* Try to open for append, but create if nonexisting */
+        flags = O_WRONLY|O_CREAT|O_APPEND;
+      else if(data->state.resume_from > 0)
+        /* If we have restart position then open for append */
+        flags = O_WRONLY|O_APPEND;
+      else
+        /* Clear file before writing (normal behaviour) */
+        flags = O_WRONLY|O_CREAT|O_TRUNC;
+
+      if(sshc->sftp_file)
+        sftp_close(sshc->sftp_file);
+      sshc->sftp_file =
+        sftp_open(sshc->sftp_session, protop->path,
+                  flags, (mode_t)data->set.new_file_perms);
+      if(!sshc->sftp_file) {
+        err = sftp_get_error(sshc->sftp_session);
+
+        if(((err == SSH_FX_NO_SUCH_FILE || err == SSH_FX_FAILURE ||
+             err == SSH_FX_NO_SUCH_PATH)) &&
+             (data->set.ftp_create_missing_dirs &&
+             (strlen(protop->path) > 1))) {
+               /* try to create the path remotely */
+               rc = 0;
+               sshc->secondCreateDirs = 1;
+               state(conn, SSH_SFTP_CREATE_DIRS_INIT);
+               break;
+        }
+        else {
+          MOVE_TO_SFTP_CLOSE_STATE();
+        }
+      }
+
+      /* If we have a restart point then we need to seek to the correct
+         position. */
+      if(data->state.resume_from > 0) {
+        /* Let's read off the proper amount of bytes from the input. */
+        if(conn->seek_func) {
+          Curl_set_in_callback(data, true);
+          seekerr = conn->seek_func(conn->seek_client, data->state.resume_from,
+                                    SEEK_SET);
+          Curl_set_in_callback(data, false);
+        }
+
+        if(seekerr != CURL_SEEKFUNC_OK) {
+          curl_off_t passed = 0;
+
+          if(seekerr != CURL_SEEKFUNC_CANTSEEK) {
+            failf(data, "Could not seek stream");
+            return CURLE_FTP_COULDNT_USE_REST;
+          }
+          /* seekerr == CURL_SEEKFUNC_CANTSEEK (can't seek to offset) */
+          do {
+            size_t readthisamountnow =
+              (data->state.resume_from - passed > data->set.buffer_size) ?
+              (size_t)data->set.buffer_size :
+              curlx_sotouz(data->state.resume_from - passed);
+
+            size_t actuallyread =
+              data->state.fread_func(data->state.buffer, 1,
+                                     readthisamountnow, data->state.in);
+
+            passed += actuallyread;
+            if((actuallyread == 0) || (actuallyread > readthisamountnow)) {
+              /* this checks for greater-than only to make sure that the
+                 CURL_READFUNC_ABORT return code still aborts */
+              failf(data, "Failed to read data");
+              MOVE_TO_ERROR_STATE(CURLE_FTP_COULDNT_USE_REST);
+            }
+          } while(passed < data->state.resume_from);
+        }
+
+        /* now, decrease the size of the read */
+        if(data->state.infilesize > 0) {
+          data->state.infilesize -= data->state.resume_from;
+          data->req.size = data->state.infilesize;
+          Curl_pgrsSetUploadSize(data, data->state.infilesize);
+        }
+
+        rc = sftp_seek64(sshc->sftp_file, data->state.resume_from);
+        if(rc != 0) {
+          MOVE_TO_SFTP_CLOSE_STATE();
+        }
+      }
+      if(data->state.infilesize > 0) {
+        data->req.size = data->state.infilesize;
+        Curl_pgrsSetUploadSize(data, data->state.infilesize);
+      }
+      /* upload data */
+      Curl_setup_transfer(data, -1, -1, FALSE, FIRSTSOCKET);
+
+      /* not set by Curl_setup_transfer to preserve keepon bits */
+      conn->sockfd = conn->writesockfd;
+
+      /* store this original bitmask setup to use later on if we can't
+         figure out a "real" bitmask */
+      sshc->orig_waitfor = data->req.keepon;
+
+      /* we want to use the _sending_ function even when the socket turns
+         out readable as the underlying libssh sftp send function will deal
+         with both accordingly */
+      conn->cselect_bits = CURL_CSELECT_OUT;
+
+      /* since we don't really wait for anything at this point, we want the
+         state machine to move on as soon as possible so we set a very short
+         timeout here */
+      Curl_expire(data, 0, EXPIRE_RUN_NOW);
+
+      state(conn, SSH_STOP);
+      break;
+    }
+
+    case SSH_SFTP_CREATE_DIRS_INIT:
+      if(strlen(protop->path) > 1) {
+        sshc->slash_pos = protop->path + 1; /* ignore the leading '/' */
+        state(conn, SSH_SFTP_CREATE_DIRS);
+      }
+      else {
+        state(conn, SSH_SFTP_UPLOAD_INIT);
+      }
+      break;
+
+    case SSH_SFTP_CREATE_DIRS:
+      sshc->slash_pos = strchr(sshc->slash_pos, '/');
+      if(sshc->slash_pos) {
+        *sshc->slash_pos = 0;
+
+        infof(data, "Creating directory '%s'\n", protop->path);
+        state(conn, SSH_SFTP_CREATE_DIRS_MKDIR);
+        break;
+      }
+      state(conn, SSH_SFTP_UPLOAD_INIT);
+      break;
+
+    case SSH_SFTP_CREATE_DIRS_MKDIR:
+      /* 'mode' - parameter is preliminary - default to 0644 */
+      rc = sftp_mkdir(sshc->sftp_session, protop->path,
+                      (mode_t)data->set.new_directory_perms);
+      *sshc->slash_pos = '/';
+      ++sshc->slash_pos;
+      if(rc < 0) {
+        /*
+         * Abort if failure wasn't that the dir already exists or the
+         * permission was denied (creation might succeed further down the
+         * path) - retry on unspecific FAILURE also
+         */
+        err = sftp_get_error(sshc->sftp_session);
+        if((err != SSH_FX_FILE_ALREADY_EXISTS) &&
+           (err != SSH_FX_FAILURE) &&
+           (err != SSH_FX_PERMISSION_DENIED)) {
+          MOVE_TO_SFTP_CLOSE_STATE();
+        }
+        rc = 0; /* clear rc and continue */
+      }
+      state(conn, SSH_SFTP_CREATE_DIRS);
+      break;
+
+    case SSH_SFTP_READDIR_INIT:
+      Curl_pgrsSetDownloadSize(data, -1);
+      if(data->set.opt_no_body) {
+        state(conn, SSH_STOP);
+        break;
+      }
+
+      /*
+       * This is a directory that we are trying to get, so produce a directory
+       * listing
+       */
+      sshc->sftp_dir = sftp_opendir(sshc->sftp_session,
+                                    protop->path);
+      if(!sshc->sftp_dir) {
+        failf(data, "Could not open directory for reading: %s",
+              ssh_get_error(sshc->ssh_session));
+        MOVE_TO_SFTP_CLOSE_STATE();
+      }
+      state(conn, SSH_SFTP_READDIR);
+      break;
+
+    case SSH_SFTP_READDIR:
+
+      if(sshc->readdir_attrs)
+        sftp_attributes_free(sshc->readdir_attrs);
+
+      sshc->readdir_attrs = sftp_readdir(sshc->sftp_session, sshc->sftp_dir);
+      if(sshc->readdir_attrs) {
+        sshc->readdir_filename = sshc->readdir_attrs->name;
+        sshc->readdir_longentry = sshc->readdir_attrs->longname;
+        sshc->readdir_len = strlen(sshc->readdir_filename);
+
+        if(data->set.ftp_list_only) {
+          char *tmpLine;
+
+          tmpLine = aprintf("%s\n", sshc->readdir_filename);
+          if(tmpLine == NULL) {
+            state(conn, SSH_SFTP_CLOSE);
+            sshc->actualcode = CURLE_OUT_OF_MEMORY;
+            break;
+          }
+          result = Curl_client_write(conn, CLIENTWRITE_BODY,
+                                     tmpLine, sshc->readdir_len + 1);
+          free(tmpLine);
+
+          if(result) {
+            state(conn, SSH_STOP);
+            break;
+          }
+          /* since this counts what we send to the client, we include the
+             newline in this counter */
+          data->req.bytecount += sshc->readdir_len + 1;
+
+          /* output debug output if that is requested */
+          if(data->set.verbose) {
+            Curl_debug(data, CURLINFO_DATA_OUT,
+                       (char *)sshc->readdir_filename,
+                       sshc->readdir_len);
+          }
+        }
+        else {
+          sshc->readdir_currLen = strlen(sshc->readdir_longentry);
+          sshc->readdir_totalLen = 80 + sshc->readdir_currLen;
+          sshc->readdir_line = calloc(sshc->readdir_totalLen, 1);
+          if(!sshc->readdir_line) {
+            state(conn, SSH_SFTP_CLOSE);
+            sshc->actualcode = CURLE_OUT_OF_MEMORY;
+            break;
+          }
+
+          memcpy(sshc->readdir_line, sshc->readdir_longentry,
+                 sshc->readdir_currLen);
+          if((sshc->readdir_attrs->flags & SSH_FILEXFER_ATTR_PERMISSIONS) &&
+             ((sshc->readdir_attrs->permissions & S_IFMT) ==
+              S_IFLNK)) {
+            sshc->readdir_linkPath = malloc(PATH_MAX + 1);
+            if(sshc->readdir_linkPath == NULL) {
+              state(conn, SSH_SFTP_CLOSE);
+              sshc->actualcode = CURLE_OUT_OF_MEMORY;
+              break;
+            }
+
+            msnprintf(sshc->readdir_linkPath, PATH_MAX, "%s%s", protop->path,
+                      sshc->readdir_filename);
+
+            state(conn, SSH_SFTP_READDIR_LINK);
+            break;
+          }
+          state(conn, SSH_SFTP_READDIR_BOTTOM);
+          break;
+        }
+      }
+      else if(sshc->readdir_attrs == NULL && sftp_dir_eof(sshc->sftp_dir)) {
+        state(conn, SSH_SFTP_READDIR_DONE);
+        break;
+      }
+      else {
+        failf(data, "Could not open remote file for reading: %s",
+              ssh_get_error(sshc->ssh_session));
+        MOVE_TO_SFTP_CLOSE_STATE();
+        break;
+      }
+      break;
+
+    case SSH_SFTP_READDIR_LINK:
+      if(sshc->readdir_link_attrs)
+        sftp_attributes_free(sshc->readdir_link_attrs);
+
+      sshc->readdir_link_attrs = sftp_lstat(sshc->sftp_session,
+                                            sshc->readdir_linkPath);
+      if(sshc->readdir_link_attrs == 0) {
+        failf(data, "Could not read symlink for reading: %s",
+              ssh_get_error(sshc->ssh_session));
+        MOVE_TO_SFTP_CLOSE_STATE();
+      }
+
+      if(sshc->readdir_link_attrs->name == NULL) {
+        sshc->readdir_tmp = sftp_readlink(sshc->sftp_session,
+                                          sshc->readdir_linkPath);
+        if(sshc->readdir_filename == NULL)
+          sshc->readdir_len = 0;
+        else
+          sshc->readdir_len = strlen(sshc->readdir_tmp);
+        sshc->readdir_longentry = NULL;
+        sshc->readdir_filename = sshc->readdir_tmp;
+      }
+      else {
+        sshc->readdir_len = strlen(sshc->readdir_link_attrs->name);
+        sshc->readdir_filename = sshc->readdir_link_attrs->name;
+        sshc->readdir_longentry = sshc->readdir_link_attrs->longname;
+      }
+
+      Curl_safefree(sshc->readdir_linkPath);
+
+      /* get room for the filename and extra output */
+      sshc->readdir_totalLen += 4 + sshc->readdir_len;
+      new_readdir_line = Curl_saferealloc(sshc->readdir_line,
+                                          sshc->readdir_totalLen);
+      if(!new_readdir_line) {
+        sshc->readdir_line = NULL;
+        state(conn, SSH_SFTP_CLOSE);
+        sshc->actualcode = CURLE_OUT_OF_MEMORY;
+        break;
+      }
+      sshc->readdir_line = new_readdir_line;
+
+      sshc->readdir_currLen += msnprintf(sshc->readdir_line +
+                                         sshc->readdir_currLen,
+                                         sshc->readdir_totalLen -
+                                         sshc->readdir_currLen,
+                                         " -> %s",
+                                         sshc->readdir_filename);
+
+      sftp_attributes_free(sshc->readdir_link_attrs);
+      sshc->readdir_link_attrs = NULL;
+      sshc->readdir_filename = NULL;
+      sshc->readdir_longentry = NULL;
+
+      state(conn, SSH_SFTP_READDIR_BOTTOM);
+      /* FALLTHROUGH */
+    case SSH_SFTP_READDIR_BOTTOM:
+      sshc->readdir_currLen += msnprintf(sshc->readdir_line +
+                                         sshc->readdir_currLen,
+                                         sshc->readdir_totalLen -
+                                         sshc->readdir_currLen, "\n");
+      result = Curl_client_write(conn, CLIENTWRITE_BODY,
+                                 sshc->readdir_line,
+                                 sshc->readdir_currLen);
+
+      if(!result) {
+
+        /* output debug output if that is requested */
+        if(data->set.verbose) {
+          Curl_debug(data, CURLINFO_DATA_OUT, sshc->readdir_line,
+                     sshc->readdir_currLen);
+        }
+        data->req.bytecount += sshc->readdir_currLen;
+      }
+      Curl_safefree(sshc->readdir_line);
+      ssh_string_free_char(sshc->readdir_tmp);
+      sshc->readdir_tmp = NULL;
+
+      if(result) {
+        state(conn, SSH_STOP);
+      }
+      else
+        state(conn, SSH_SFTP_READDIR);
+      break;
+
+    case SSH_SFTP_READDIR_DONE:
+      sftp_closedir(sshc->sftp_dir);
+      sshc->sftp_dir = NULL;
+
+      /* no data to transfer */
+      Curl_setup_transfer(data, -1, -1, FALSE, -1);
+      state(conn, SSH_STOP);
+      break;
+
+    case SSH_SFTP_DOWNLOAD_INIT:
+      /*
+       * Work on getting the specified file
+       */
+      if(sshc->sftp_file)
+        sftp_close(sshc->sftp_file);
+
+      sshc->sftp_file = sftp_open(sshc->sftp_session, protop->path,
+                                  O_RDONLY, (mode_t)data->set.new_file_perms);
+      if(!sshc->sftp_file) {
+        failf(data, "Could not open remote file for reading: %s",
+              ssh_get_error(sshc->ssh_session));
+
+        MOVE_TO_SFTP_CLOSE_STATE();
+      }
+
+      state(conn, SSH_SFTP_DOWNLOAD_STAT);
+      break;
+
+    case SSH_SFTP_DOWNLOAD_STAT:
+    {
+      sftp_attributes attrs;
+      curl_off_t size;
+
+      attrs = sftp_fstat(sshc->sftp_file);
+      if(!attrs ||
+              !(attrs->flags & SSH_FILEXFER_ATTR_SIZE) ||
+              (attrs->size == 0)) {
+        /*
+         * sftp_fstat didn't return an error, so maybe the server
+         * just doesn't support stat()
+         * OR the server doesn't return a file size with a stat()
+         * OR file size is 0
+         */
+        data->req.size = -1;
+        data->req.maxdownload = -1;
+        Curl_pgrsSetDownloadSize(data, -1);
+        size = 0;
+      }
+      else {
+        size = attrs->size;
+
+        sftp_attributes_free(attrs);
+
+        if(size < 0) {
+          failf(data, "Bad file size (%" CURL_FORMAT_CURL_OFF_T ")", size);
+          return CURLE_BAD_DOWNLOAD_RESUME;
+        }
+        if(conn->data->state.use_range) {
+          curl_off_t from, to;
+          char *ptr;
+          char *ptr2;
+          CURLofft to_t;
+          CURLofft from_t;
+
+          from_t = curlx_strtoofft(conn->data->state.range, &ptr, 0, &from);
+          if(from_t == CURL_OFFT_FLOW) {
+            return CURLE_RANGE_ERROR;
+          }
+          while(*ptr && (ISSPACE(*ptr) || (*ptr == '-')))
+            ptr++;
+          to_t = curlx_strtoofft(ptr, &ptr2, 0, &to);
+          if(to_t == CURL_OFFT_FLOW) {
+            return CURLE_RANGE_ERROR;
+          }
+          if((to_t == CURL_OFFT_INVAL) /* no "to" value given */
+             || (to >= size)) {
+            to = size - 1;
+          }
+          if(from_t) {
+            /* from is relative to end of file */
+            from = size - to;
+            to = size - 1;
+          }
+          if(from > size) {
+            failf(data, "Offset (%"
+                  CURL_FORMAT_CURL_OFF_T ") was beyond file size (%"
+                  CURL_FORMAT_CURL_OFF_T ")", from, size);
+            return CURLE_BAD_DOWNLOAD_RESUME;
+          }
+          if(from > to) {
+            from = to;
+            size = 0;
+          }
+          else {
+            size = to - from + 1;
+          }
+
+          rc = sftp_seek64(sshc->sftp_file, from);
+          if(rc != 0) {
+            MOVE_TO_SFTP_CLOSE_STATE();
+          }
+        }
+        data->req.size = size;
+        data->req.maxdownload = size;
+        Curl_pgrsSetDownloadSize(data, size);
+      }
+
+      /* We can resume if we can seek to the resume position */
+      if(data->state.resume_from) {
+        if(data->state.resume_from < 0) {
+          /* We're supposed to download the last abs(from) bytes */
+          if((curl_off_t)size < -data->state.resume_from) {
+            failf(data, "Offset (%"
+                  CURL_FORMAT_CURL_OFF_T ") was beyond file size (%"
+                  CURL_FORMAT_CURL_OFF_T ")",
+                  data->state.resume_from, size);
+            return CURLE_BAD_DOWNLOAD_RESUME;
+          }
+          /* download from where? */
+          data->state.resume_from += size;
+        }
+        else {
+          if((curl_off_t)size < data->state.resume_from) {
+            failf(data, "Offset (%" CURL_FORMAT_CURL_OFF_T
+                  ") was beyond file size (%" CURL_FORMAT_CURL_OFF_T ")",
+                  data->state.resume_from, size);
+            return CURLE_BAD_DOWNLOAD_RESUME;
+          }
+        }
+        /* Does a completed file need to be seeked and started or closed ? */
+        /* Now store the number of bytes we are expected to download */
+        data->req.size = size - data->state.resume_from;
+        data->req.maxdownload = size - data->state.resume_from;
+        Curl_pgrsSetDownloadSize(data,
+                                 size - data->state.resume_from);
+
+        rc = sftp_seek64(sshc->sftp_file, data->state.resume_from);
+        if(rc != 0) {
+          MOVE_TO_SFTP_CLOSE_STATE();
+        }
+      }
+    }
+
+    /* Setup the actual download */
+    if(data->req.size == 0) {
+      /* no data to transfer */
+      Curl_setup_transfer(data, -1, -1, FALSE, -1);
+      infof(data, "File already completely downloaded\n");
+      state(conn, SSH_STOP);
+      break;
+    }
+    Curl_setup_transfer(data, FIRSTSOCKET, data->req.size, FALSE, -1);
+
+    /* not set by Curl_setup_transfer to preserve keepon bits */
+    conn->writesockfd = conn->sockfd;
+
+    /* we want to use the _receiving_ function even when the socket turns
+       out writableable as the underlying libssh recv function will deal
+       with both accordingly */
+    conn->cselect_bits = CURL_CSELECT_IN;
+
+    if(result) {
+      /* this should never occur; the close state should be entered
+         at the time the error occurs */
+      state(conn, SSH_SFTP_CLOSE);
+      sshc->actualcode = result;
+    }
+    else {
+      sshc->sftp_recv_state = 0;
+      state(conn, SSH_STOP);
+    }
+    break;
+
+    case SSH_SFTP_CLOSE:
+      if(sshc->sftp_file) {
+        sftp_close(sshc->sftp_file);
+        sshc->sftp_file = NULL;
+      }
+      Curl_safefree(protop->path);
+
+      DEBUGF(infof(data, "SFTP DONE done\n"));
+
+      /* Check if nextstate is set and move .nextstate could be POSTQUOTE_INIT
+         After nextstate is executed, the control should come back to
+         SSH_SFTP_CLOSE to pass the correct result back  */
+      if(sshc->nextstate != SSH_NO_STATE &&
+         sshc->nextstate != SSH_SFTP_CLOSE) {
+        state(conn, sshc->nextstate);
+        sshc->nextstate = SSH_SFTP_CLOSE;
+      }
+      else {
+        state(conn, SSH_STOP);
+        result = sshc->actualcode;
+      }
+      break;
+
+    case SSH_SFTP_SHUTDOWN:
+      /* during times we get here due to a broken transfer and then the
+         sftp_handle might not have been taken down so make sure that is done
+         before we proceed */
+
+      if(sshc->sftp_file) {
+        sftp_close(sshc->sftp_file);
+        sshc->sftp_file = NULL;
+      }
+
+      if(sshc->sftp_session) {
+        sftp_free(sshc->sftp_session);
+        sshc->sftp_session = NULL;
+      }
+
+      SSH_STRING_FREE_CHAR(sshc->homedir);
+      conn->data->state.most_recent_ftp_entrypath = NULL;
+
+      state(conn, SSH_SESSION_DISCONNECT);
+      break;
+
+
+    case SSH_SCP_TRANS_INIT:
+      result = Curl_getworkingpath(conn, sshc->homedir, &protop->path);
+      if(result) {
+        sshc->actualcode = result;
+        state(conn, SSH_STOP);
+        break;
+      }
+
+      /* Functions from the SCP subsystem cannot handle/return SSH_AGAIN */
+      ssh_set_blocking(sshc->ssh_session, 1);
+
+      if(data->set.upload) {
+        if(data->state.infilesize < 0) {
+          failf(data, "SCP requires a known file size for upload");
+          sshc->actualcode = CURLE_UPLOAD_FAILED;
+          MOVE_TO_ERROR_STATE(CURLE_UPLOAD_FAILED);
+        }
+
+        sshc->scp_session =
+          ssh_scp_new(sshc->ssh_session, SSH_SCP_WRITE, protop->path);
+        state(conn, SSH_SCP_UPLOAD_INIT);
+      }
+      else {
+        sshc->scp_session =
+          ssh_scp_new(sshc->ssh_session, SSH_SCP_READ, protop->path);
+        state(conn, SSH_SCP_DOWNLOAD_INIT);
+      }
+
+      if(!sshc->scp_session) {
+        err_msg = ssh_get_error(sshc->ssh_session);
+        failf(conn->data, "%s", err_msg);
+        MOVE_TO_ERROR_STATE(CURLE_UPLOAD_FAILED);
+      }
+
+      break;
+
+    case SSH_SCP_UPLOAD_INIT:
+
+      rc = ssh_scp_init(sshc->scp_session);
+      if(rc != SSH_OK) {
+        err_msg = ssh_get_error(sshc->ssh_session);
+        failf(conn->data, "%s", err_msg);
+        MOVE_TO_ERROR_STATE(CURLE_UPLOAD_FAILED);
+      }
+
+      rc = ssh_scp_push_file(sshc->scp_session, protop->path,
+                             data->state.infilesize,
+                             (int)data->set.new_file_perms);
+      if(rc != SSH_OK) {
+        err_msg = ssh_get_error(sshc->ssh_session);
+        failf(conn->data, "%s", err_msg);
+        MOVE_TO_ERROR_STATE(CURLE_UPLOAD_FAILED);
+      }
+
+      /* upload data */
+      Curl_setup_transfer(data, -1, data->req.size, FALSE, FIRSTSOCKET);
+
+      /* not set by Curl_setup_transfer to preserve keepon bits */
+      conn->sockfd = conn->writesockfd;
+
+      /* store this original bitmask setup to use later on if we can't
+         figure out a "real" bitmask */
+      sshc->orig_waitfor = data->req.keepon;
+
+      /* we want to use the _sending_ function even when the socket turns
+         out readable as the underlying libssh scp send function will deal
+         with both accordingly */
+      conn->cselect_bits = CURL_CSELECT_OUT;
+
+      state(conn, SSH_STOP);
+
+      break;
+
+    case SSH_SCP_DOWNLOAD_INIT:
+
+      rc = ssh_scp_init(sshc->scp_session);
+      if(rc != SSH_OK) {
+        err_msg = ssh_get_error(sshc->ssh_session);
+        failf(conn->data, "%s", err_msg);
+        MOVE_TO_ERROR_STATE(CURLE_COULDNT_CONNECT);
+      }
+      state(conn, SSH_SCP_DOWNLOAD);
+      /* FALLTHROUGH */
+
+    case SSH_SCP_DOWNLOAD:{
+        curl_off_t bytecount;
+
+        rc = ssh_scp_pull_request(sshc->scp_session);
+        if(rc != SSH_SCP_REQUEST_NEWFILE) {
+          err_msg = ssh_get_error(sshc->ssh_session);
+          failf(conn->data, "%s", err_msg);
+          MOVE_TO_ERROR_STATE(CURLE_REMOTE_FILE_NOT_FOUND);
+          break;
+        }
+
+        /* download data */
+        bytecount = ssh_scp_request_get_size(sshc->scp_session);
+        data->req.maxdownload = (curl_off_t) bytecount;
+        Curl_setup_transfer(data, FIRSTSOCKET, bytecount, FALSE, -1);
+
+        /* not set by Curl_setup_transfer to preserve keepon bits */
+        conn->writesockfd = conn->sockfd;
+
+        /* we want to use the _receiving_ function even when the socket turns
+           out writableable as the underlying libssh recv function will deal
+           with both accordingly */
+        conn->cselect_bits = CURL_CSELECT_IN;
+
+        state(conn, SSH_STOP);
+        break;
+      }
+    case SSH_SCP_DONE:
+      if(data->set.upload)
+        state(conn, SSH_SCP_SEND_EOF);
+      else
+        state(conn, SSH_SCP_CHANNEL_FREE);
+      break;
+
+    case SSH_SCP_SEND_EOF:
+      if(sshc->scp_session) {
+        rc = ssh_scp_close(sshc->scp_session);
+        if(rc == SSH_AGAIN) {
+          /* Currently the ssh_scp_close handles waiting for EOF in
+           * blocking way.
+           */
+          break;
+        }
+        if(rc != SSH_OK) {
+          infof(data, "Failed to close libssh scp channel: %s\n",
+                ssh_get_error(sshc->ssh_session));
+        }
+      }
+
+      state(conn, SSH_SCP_CHANNEL_FREE);
+      break;
+
+    case SSH_SCP_CHANNEL_FREE:
+      if(sshc->scp_session) {
+        ssh_scp_free(sshc->scp_session);
+        sshc->scp_session = NULL;
+      }
+      DEBUGF(infof(data, "SCP DONE phase complete\n"));
+
+      ssh_set_blocking(sshc->ssh_session, 0);
+
+      state(conn, SSH_SESSION_DISCONNECT);
+      /* FALLTHROUGH */
+
+    case SSH_SESSION_DISCONNECT:
+      /* during weird times when we've been prematurely aborted, the channel
+         is still alive when we reach this state and we MUST kill the channel
+         properly first */
+      if(sshc->scp_session) {
+        ssh_scp_free(sshc->scp_session);
+        sshc->scp_session = NULL;
+      }
+
+      ssh_disconnect(sshc->ssh_session);
+
+      SSH_STRING_FREE_CHAR(sshc->homedir);
+      conn->data->state.most_recent_ftp_entrypath = NULL;
+
+      state(conn, SSH_SESSION_FREE);
+      /* FALLTHROUGH */
+    case SSH_SESSION_FREE:
+      if(sshc->ssh_session) {
+        ssh_free(sshc->ssh_session);
+        sshc->ssh_session = NULL;
+      }
+
+      /* worst-case scenario cleanup */
+
+      DEBUGASSERT(sshc->ssh_session == NULL);
+      DEBUGASSERT(sshc->scp_session == NULL);
+
+      if(sshc->readdir_tmp) {
+        ssh_string_free_char(sshc->readdir_tmp);
+        sshc->readdir_tmp = NULL;
+      }
+
+      if(sshc->quote_attrs)
+        sftp_attributes_free(sshc->quote_attrs);
+
+      if(sshc->readdir_attrs)
+        sftp_attributes_free(sshc->readdir_attrs);
+
+      if(sshc->readdir_link_attrs)
+        sftp_attributes_free(sshc->readdir_link_attrs);
+
+      if(sshc->privkey)
+        ssh_key_free(sshc->privkey);
+      if(sshc->pubkey)
+        ssh_key_free(sshc->pubkey);
+
+      Curl_safefree(sshc->rsa_pub);
+      Curl_safefree(sshc->rsa);
+      Curl_safefree(sshc->quote_path1);
+      Curl_safefree(sshc->quote_path2);
+      Curl_safefree(sshc->readdir_line);
+      Curl_safefree(sshc->readdir_linkPath);
+      SSH_STRING_FREE_CHAR(sshc->homedir);
+
+      /* the code we are about to return */
+      result = sshc->actualcode;
+
+      memset(sshc, 0, sizeof(struct ssh_conn));
+
+      connclose(conn, "SSH session free");
+      sshc->state = SSH_SESSION_FREE;   /* current */
+      sshc->nextstate = SSH_NO_STATE;
+      state(conn, SSH_STOP);
+      break;
+
+    case SSH_QUIT:
+      /* fallthrough, just stop! */
+    default:
+      /* internal error */
+      sshc->nextstate = SSH_NO_STATE;
+      state(conn, SSH_STOP);
+      break;
+
+    }
+  } while(!rc && (sshc->state != SSH_STOP));
+
+
+  if(rc == SSH_AGAIN) {
+    /* we would block, we need to wait for the socket to be ready (in the
+       right direction too)! */
+    *block = TRUE;
+  }
+
+  return result;
+}
+
+
+/* called by the multi interface to figure out what socket(s) to wait for and
+   for what actions in the DO_DONE, PERFORM and WAITPERFORM states */
+static int myssh_perform_getsock(const struct connectdata *conn,
+                                 curl_socket_t *sock)
+{
+  int bitmap = GETSOCK_BLANK;
+  sock[0] = conn->sock[FIRSTSOCKET];
+
+  if(conn->waitfor & KEEP_RECV)
+    bitmap |= GETSOCK_READSOCK(FIRSTSOCKET);
+
+  if(conn->waitfor & KEEP_SEND)
+    bitmap |= GETSOCK_WRITESOCK(FIRSTSOCKET);
+
+  return bitmap;
+}
+
+/* Generic function called by the multi interface to figure out what socket(s)
+   to wait for and for what actions during the DOING and PROTOCONNECT states*/
+static int myssh_getsock(struct connectdata *conn,
+                         curl_socket_t *sock)
+{
+  /* if we know the direction we can use the generic *_getsock() function even
+     for the protocol_connect and doing states */
+  return myssh_perform_getsock(conn, sock);
+}
+
+static void myssh_block2waitfor(struct connectdata *conn, bool block)
+{
+  struct ssh_conn *sshc = &conn->proto.sshc;
+
+  /* If it didn't block, or nothing was returned by ssh_get_poll_flags
+   * have the original set */
+  conn->waitfor = sshc->orig_waitfor;
+
+  if(block) {
+    int dir = ssh_get_poll_flags(sshc->ssh_session);
+    if(dir & SSH_READ_PENDING) {
+      /* translate the libssh define bits into our own bit defines */
+      conn->waitfor = KEEP_RECV;
+    }
+    else if(dir & SSH_WRITE_PENDING) {
+      conn->waitfor = KEEP_SEND;
+    }
+  }
+}
+
+/* called repeatedly until done from multi.c */
+static CURLcode myssh_multi_statemach(struct connectdata *conn,
+                                      bool *done)
+{
+  struct ssh_conn *sshc = &conn->proto.sshc;
+  bool block;    /* we store the status and use that to provide a ssh_getsock()
+                    implementation */
+  CURLcode result = myssh_statemach_act(conn, &block);
+
+  *done = (sshc->state == SSH_STOP) ? TRUE : FALSE;
+  myssh_block2waitfor(conn, block);
+
+  return result;
+}
+
+static CURLcode myssh_block_statemach(struct connectdata *conn,
+                                      bool disconnect)
+{
+  struct ssh_conn *sshc = &conn->proto.sshc;
+  CURLcode result = CURLE_OK;
+  struct Curl_easy *data = conn->data;
+
+  while((sshc->state != SSH_STOP) && !result) {
+    bool block;
+    timediff_t left = 1000;
+    struct curltime now = Curl_now();
+
+    result = myssh_statemach_act(conn, &block);
+    if(result)
+      break;
+
+    if(!disconnect) {
+      if(Curl_pgrsUpdate(conn))
+        return CURLE_ABORTED_BY_CALLBACK;
+
+      result = Curl_speedcheck(data, now);
+      if(result)
+        break;
+
+      left = Curl_timeleft(data, NULL, FALSE);
+      if(left < 0) {
+        failf(data, "Operation timed out");
+        return CURLE_OPERATION_TIMEDOUT;
+      }
+    }
+
+    if(!result && block) {
+      curl_socket_t fd_read = conn->sock[FIRSTSOCKET];
+      /* wait for the socket to become ready */
+      (void) Curl_socket_check(fd_read, CURL_SOCKET_BAD,
+                               CURL_SOCKET_BAD, left > 1000 ? 1000 : left);
+    }
+
+  }
+
+  return result;
+}
+
+/*
+ * SSH setup connection
+ */
+static CURLcode myssh_setup_connection(struct connectdata *conn)
+{
+  struct SSHPROTO *ssh;
+
+  conn->data->req.protop = ssh = calloc(1, sizeof(struct SSHPROTO));
+  if(!ssh)
+    return CURLE_OUT_OF_MEMORY;
+
+  return CURLE_OK;
+}
+
+static Curl_recv scp_recv, sftp_recv;
+static Curl_send scp_send, sftp_send;
+
+/*
+ * Curl_ssh_connect() gets called from Curl_protocol_connect() to allow us to
+ * do protocol-specific actions at connect-time.
+ */
+static CURLcode myssh_connect(struct connectdata *conn, bool *done)
+{
+  struct ssh_conn *ssh;
+  CURLcode result;
+  curl_socket_t sock = conn->sock[FIRSTSOCKET];
+  struct Curl_easy *data = conn->data;
+
+  /* initialize per-handle data if not already */
+  if(!data->req.protop)
+    myssh_setup_connection(conn);
+
+  /* We default to persistent connections. We set this already in this connect
+     function to make the re-use checks properly be able to check this bit. */
+  connkeep(conn, "SSH default");
+
+  if(conn->handler->protocol & CURLPROTO_SCP) {
+    conn->recv[FIRSTSOCKET] = scp_recv;
+    conn->send[FIRSTSOCKET] = scp_send;
+  }
+  else {
+    conn->recv[FIRSTSOCKET] = sftp_recv;
+    conn->send[FIRSTSOCKET] = sftp_send;
+  }
+
+  ssh = &conn->proto.sshc;
+
+  ssh->ssh_session = ssh_new();
+  if(ssh->ssh_session == NULL) {
+    failf(data, "Failure initialising ssh session");
+    return CURLE_FAILED_INIT;
+  }
+
+  ssh_options_set(ssh->ssh_session, SSH_OPTIONS_FD, &sock);
+
+  if(conn->user) {
+    infof(data, "User: %s\n", conn->user);
+    ssh_options_set(ssh->ssh_session, SSH_OPTIONS_USER, conn->user);
+  }
+
+  if(data->set.str[STRING_SSH_KNOWNHOSTS]) {
+    infof(data, "Known hosts: %s\n", data->set.str[STRING_SSH_KNOWNHOSTS]);
+    ssh_options_set(ssh->ssh_session, SSH_OPTIONS_KNOWNHOSTS,
+                    data->set.str[STRING_SSH_KNOWNHOSTS]);
+  }
+
+  ssh_options_set(ssh->ssh_session, SSH_OPTIONS_HOST, conn->host.name);
+  if(conn->remote_port)
+    ssh_options_set(ssh->ssh_session, SSH_OPTIONS_PORT,
+                    &conn->remote_port);
+
+  if(data->set.ssh_compression) {
+    ssh_options_set(ssh->ssh_session, SSH_OPTIONS_COMPRESSION,
+                    "zlib,zlib@openssh.com,none");
+  }
+
+  ssh->privkey = NULL;
+  ssh->pubkey = NULL;
+
+  if(data->set.str[STRING_SSH_PUBLIC_KEY]) {
+    int rc = ssh_pki_import_pubkey_file(data->set.str[STRING_SSH_PUBLIC_KEY],
+                                        &ssh->pubkey);
+    if(rc != SSH_OK) {
+      failf(data, "Could not load public key file");
+      /* ignore */
+    }
+  }
+
+  /* we do not verify here, we do it at the state machine,
+   * after connection */
+
+  state(conn, SSH_INIT);
+
+  result = myssh_multi_statemach(conn, done);
+
+  return result;
+}
+
+/* called from multi.c while DOing */
+static CURLcode scp_doing(struct connectdata *conn, bool *dophase_done)
+{
+  CURLcode result;
+
+  result = myssh_multi_statemach(conn, dophase_done);
+
+  if(*dophase_done) {
+    DEBUGF(infof(conn->data, "DO phase is complete\n"));
+  }
+  return result;
+}
+
+/*
+ ***********************************************************************
+ *
+ * scp_perform()
+ *
+ * This is the actual DO function for SCP. Get a file according to
+ * the options previously setup.
+ */
+
+static
+CURLcode scp_perform(struct connectdata *conn,
+                     bool *connected, bool *dophase_done)
+{
+  CURLcode result = CURLE_OK;
+
+  DEBUGF(infof(conn->data, "DO phase starts\n"));
+
+  *dophase_done = FALSE;        /* not done yet */
+
+  /* start the first command in the DO phase */
+  state(conn, SSH_SCP_TRANS_INIT);
+
+  result = myssh_multi_statemach(conn, dophase_done);
+
+  *connected = conn->bits.tcpconnect[FIRSTSOCKET];
+
+  if(*dophase_done) {
+    DEBUGF(infof(conn->data, "DO phase is complete\n"));
+  }
+
+  return result;
+}
+
+static CURLcode myssh_do_it(struct connectdata *conn, bool *done)
+{
+  CURLcode result;
+  bool connected = 0;
+  struct Curl_easy *data = conn->data;
+  struct ssh_conn *sshc = &conn->proto.sshc;
+
+  *done = FALSE;                /* default to false */
+
+  data->req.size = -1;          /* make sure this is unknown at this point */
+
+  sshc->actualcode = CURLE_OK;  /* reset error code */
+  sshc->secondCreateDirs = 0;   /* reset the create dir attempt state
+                                   variable */
+
+  Curl_pgrsSetUploadCounter(data, 0);
+  Curl_pgrsSetDownloadCounter(data, 0);
+  Curl_pgrsSetUploadSize(data, -1);
+  Curl_pgrsSetDownloadSize(data, -1);
+
+  if(conn->handler->protocol & CURLPROTO_SCP)
+    result = scp_perform(conn, &connected, done);
+  else
+    result = sftp_perform(conn, &connected, done);
+
+  return result;
+}
+
+/* BLOCKING, but the function is using the state machine so the only reason
+   this is still blocking is that the multi interface code has no support for
+   disconnecting operations that takes a while */
+static CURLcode scp_disconnect(struct connectdata *conn,
+                               bool dead_connection)
+{
+  CURLcode result = CURLE_OK;
+  struct ssh_conn *ssh = &conn->proto.sshc;
+  (void) dead_connection;
+
+  if(ssh->ssh_session) {
+    /* only if there's a session still around to use! */
+
+    state(conn, SSH_SESSION_DISCONNECT);
+
+    result = myssh_block_statemach(conn, TRUE);
+  }
+
+  return result;
+}
+
+/* generic done function for both SCP and SFTP called from their specific
+   done functions */
+static CURLcode myssh_done(struct connectdata *conn, CURLcode status)
+{
+  CURLcode result = CURLE_OK;
+  struct SSHPROTO *protop = conn->data->req.protop;
+
+  if(!status) {
+    /* run the state-machine */
+    result = myssh_block_statemach(conn, FALSE);
+  }
+  else
+    result = status;
+
+  if(protop)
+    Curl_safefree(protop->path);
+  if(Curl_pgrsDone(conn))
+    return CURLE_ABORTED_BY_CALLBACK;
+
+  conn->data->req.keepon = 0;   /* clear all bits */
+  return result;
+}
+
+
+static CURLcode scp_done(struct connectdata *conn, CURLcode status,
+                         bool premature)
+{
+  (void) premature;             /* not used */
+
+  if(!status)
+    state(conn, SSH_SCP_DONE);
+
+  return myssh_done(conn, status);
+
+}
+
+static ssize_t scp_send(struct connectdata *conn, int sockindex,
+                        const void *mem, size_t len, CURLcode *err)
+{
+  int rc;
+  (void) sockindex; /* we only support SCP on the fixed known primary socket */
+  (void) err;
+
+  rc = ssh_scp_write(conn->proto.sshc.scp_session, mem, len);
+
+#if 0
+  /* The following code is misleading, mostly added as wishful thinking
+   * that libssh at some point will implement non-blocking ssh_scp_write/read.
+   * Currently rc can only be number of bytes read or SSH_ERROR. */
+  myssh_block2waitfor(conn, (rc == SSH_AGAIN) ? TRUE : FALSE);
+
+  if(rc == SSH_AGAIN) {
+    *err = CURLE_AGAIN;
+    return 0;
+  }
+  else
+#endif
+  if(rc != SSH_OK) {
+    *err = CURLE_SSH;
+    return -1;
+  }
+
+  return len;
+}
+
+static ssize_t scp_recv(struct connectdata *conn, int sockindex,
+                        char *mem, size_t len, CURLcode *err)
+{
+  ssize_t nread;
+  (void) err;
+  (void) sockindex; /* we only support SCP on the fixed known primary socket */
+
+  /* libssh returns int */
+  nread = ssh_scp_read(conn->proto.sshc.scp_session, mem, len);
+
+#if 0
+  /* The following code is misleading, mostly added as wishful thinking
+   * that libssh at some point will implement non-blocking ssh_scp_write/read.
+   * Currently rc can only be SSH_OK or SSH_ERROR. */
+
+  myssh_block2waitfor(conn, (nread == SSH_AGAIN) ? TRUE : FALSE);
+  if(nread == SSH_AGAIN) {
+    *err = CURLE_AGAIN;
+    nread = -1;
+  }
+#endif
+
+  return nread;
+}
+
+/*
+ * =============== SFTP ===============
+ */
+
+/*
+ ***********************************************************************
+ *
+ * sftp_perform()
+ *
+ * This is the actual DO function for SFTP. Get a file/directory according to
+ * the options previously setup.
+ */
+
+static
+CURLcode sftp_perform(struct connectdata *conn,
+                      bool *connected,
+                      bool *dophase_done)
+{
+  CURLcode result = CURLE_OK;
+
+  DEBUGF(infof(conn->data, "DO phase starts\n"));
+
+  *dophase_done = FALSE; /* not done yet */
+
+  /* start the first command in the DO phase */
+  state(conn, SSH_SFTP_QUOTE_INIT);
+
+  /* run the state-machine */
+  result = myssh_multi_statemach(conn, dophase_done);
+
+  *connected = conn->bits.tcpconnect[FIRSTSOCKET];
+
+  if(*dophase_done) {
+    DEBUGF(infof(conn->data, "DO phase is complete\n"));
+  }
+
+  return result;
+}
+
+/* called from multi.c while DOing */
+static CURLcode sftp_doing(struct connectdata *conn,
+                           bool *dophase_done)
+{
+  CURLcode result = myssh_multi_statemach(conn, dophase_done);
+  if(*dophase_done) {
+    DEBUGF(infof(conn->data, "DO phase is complete\n"));
+  }
+  return result;
+}
+
+/* BLOCKING, but the function is using the state machine so the only reason
+   this is still blocking is that the multi interface code has no support for
+   disconnecting operations that takes a while */
+static CURLcode sftp_disconnect(struct connectdata *conn, bool dead_connection)
+{
+  CURLcode result = CURLE_OK;
+  (void) dead_connection;
+
+  DEBUGF(infof(conn->data, "SSH DISCONNECT starts now\n"));
+
+  if(conn->proto.sshc.ssh_session) {
+    /* only if there's a session still around to use! */
+    state(conn, SSH_SFTP_SHUTDOWN);
+    result = myssh_block_statemach(conn, TRUE);
+  }
+
+  DEBUGF(infof(conn->data, "SSH DISCONNECT is done\n"));
+
+  return result;
+
+}
+
+static CURLcode sftp_done(struct connectdata *conn, CURLcode status,
+                               bool premature)
+{
+  struct ssh_conn *sshc = &conn->proto.sshc;
+
+  if(!status) {
+    /* Post quote commands are executed after the SFTP_CLOSE state to avoid
+       errors that could happen due to open file handles during POSTQUOTE
+       operation */
+    if(!premature && conn->data->set.postquote && !conn->bits.retry)
+      sshc->nextstate = SSH_SFTP_POSTQUOTE_INIT;
+    state(conn, SSH_SFTP_CLOSE);
+  }
+  return myssh_done(conn, status);
+}
+
+/* return number of sent bytes */
+static ssize_t sftp_send(struct connectdata *conn, int sockindex,
+                         const void *mem, size_t len, CURLcode *err)
+{
+  ssize_t nwrite;
+  (void)sockindex;
+
+  nwrite = sftp_write(conn->proto.sshc.sftp_file, mem, len);
+
+  myssh_block2waitfor(conn, FALSE);
+
+#if 0 /* not returned by libssh on write */
+  if(nwrite == SSH_AGAIN) {
+    *err = CURLE_AGAIN;
+    nwrite = 0;
+  }
+  else
+#endif
+  if(nwrite < 0) {
+    *err = CURLE_SSH;
+    nwrite = -1;
+  }
+
+  return nwrite;
+}
+
+/*
+ * Return number of received (decrypted) bytes
+ * or <0 on error
+ */
+static ssize_t sftp_recv(struct connectdata *conn, int sockindex,
+                         char *mem, size_t len, CURLcode *err)
+{
+  ssize_t nread;
+  (void)sockindex;
+
+  DEBUGASSERT(len < CURL_MAX_READ_SIZE);
+
+  switch(conn->proto.sshc.sftp_recv_state) {
+    case 0:
+      conn->proto.sshc.sftp_file_index =
+            sftp_async_read_begin(conn->proto.sshc.sftp_file,
+                                  (uint32_t)len);
+      if(conn->proto.sshc.sftp_file_index < 0) {
+        *err = CURLE_RECV_ERROR;
+        return -1;
+      }
+
+      /* FALLTHROUGH */
+    case 1:
+      conn->proto.sshc.sftp_recv_state = 1;
+
+      nread = sftp_async_read(conn->proto.sshc.sftp_file,
+                              mem, (uint32_t)len,
+                              conn->proto.sshc.sftp_file_index);
+
+      myssh_block2waitfor(conn, (nread == SSH_AGAIN)?TRUE:FALSE);
+
+      if(nread == SSH_AGAIN) {
+        *err = CURLE_AGAIN;
+        return -1;
+      }
+      else if(nread < 0) {
+        *err = CURLE_RECV_ERROR;
+        return -1;
+      }
+
+      conn->proto.sshc.sftp_recv_state = 0;
+      return nread;
+
+    default:
+      /* we never reach here */
+      return -1;
+  }
+}
+
+static void sftp_quote(struct connectdata *conn)
+{
+  const char *cp;
+  struct Curl_easy *data = conn->data;
+  struct SSHPROTO *protop = data->req.protop;
+  struct ssh_conn *sshc = &conn->proto.sshc;
+  CURLcode result;
+
+  /*
+   * Support some of the "FTP" commands
+   */
+  char *cmd = sshc->quote_item->data;
+  sshc->acceptfail = FALSE;
+
+  /* if a command starts with an asterisk, which a legal SFTP command never
+     can, the command will be allowed to fail without it causing any
+     aborts or cancels etc. It will cause libcurl to act as if the command
+     is successful, whatever the server reponds. */
+
+  if(cmd[0] == '*') {
+    cmd++;
+    sshc->acceptfail = TRUE;
+  }
+
+  if(strcasecompare("pwd", cmd)) {
+    /* output debug output if that is requested */
+    char *tmp = aprintf("257 \"%s\" is current directory.\n",
+                        protop->path);
+    if(!tmp) {
+      sshc->actualcode = CURLE_OUT_OF_MEMORY;
+      state(conn, SSH_SFTP_CLOSE);
+      sshc->nextstate = SSH_NO_STATE;
+      return;
+    }
+    if(data->set.verbose) {
+      Curl_debug(data, CURLINFO_HEADER_OUT, (char *) "PWD\n", 4);
+      Curl_debug(data, CURLINFO_HEADER_IN, tmp, strlen(tmp));
+    }
+    /* this sends an FTP-like "header" to the header callback so that the
+       current directory can be read very similar to how it is read when
+       using ordinary FTP. */
+    result = Curl_client_write(conn, CLIENTWRITE_HEADER, tmp, strlen(tmp));
+    free(tmp);
+    if(result) {
+      state(conn, SSH_SFTP_CLOSE);
+      sshc->nextstate = SSH_NO_STATE;
+      sshc->actualcode = result;
+    }
+    else
+      state(conn, SSH_SFTP_NEXT_QUOTE);
+    return;
+  }
+
+  /*
+   * the arguments following the command must be separated from the
+   * command with a space so we can check for it unconditionally
+   */
+  cp = strchr(cmd, ' ');
+  if(cp == NULL) {
+    failf(data, "Syntax error in SFTP command. Supply parameter(s)!");
+    state(conn, SSH_SFTP_CLOSE);
+    sshc->nextstate = SSH_NO_STATE;
+    sshc->actualcode = CURLE_QUOTE_ERROR;
+    return;
+  }
+
+  /*
+   * also, every command takes at least one argument so we get that
+   * first argument right now
+   */
+  result = Curl_get_pathname(&cp, &sshc->quote_path1, sshc->homedir);
+  if(result) {
+    if(result == CURLE_OUT_OF_MEMORY)
+      failf(data, "Out of memory");
+    else
+      failf(data, "Syntax error: Bad first parameter");
+    state(conn, SSH_SFTP_CLOSE);
+    sshc->nextstate = SSH_NO_STATE;
+    sshc->actualcode = result;
+    return;
+  }
+
+  /*
+   * SFTP is a binary protocol, so we don't send text commands
+   * to the server. Instead, we scan for commands used by
+   * OpenSSH's sftp program and call the appropriate libssh
+   * functions.
+   */
+  if(strncasecompare(cmd, "chgrp ", 6) ||
+     strncasecompare(cmd, "chmod ", 6) ||
+     strncasecompare(cmd, "chown ", 6)) {
+    /* attribute change */
+
+    /* sshc->quote_path1 contains the mode to set */
+    /* get the destination */
+    result = Curl_get_pathname(&cp, &sshc->quote_path2, sshc->homedir);
+    if(result) {
+      if(result == CURLE_OUT_OF_MEMORY)
+        failf(data, "Out of memory");
+      else
+        failf(data, "Syntax error in chgrp/chmod/chown: "
+              "Bad second parameter");
+      Curl_safefree(sshc->quote_path1);
+      state(conn, SSH_SFTP_CLOSE);
+      sshc->nextstate = SSH_NO_STATE;
+      sshc->actualcode = result;
+      return;
+    }
+    sshc->quote_attrs = NULL;
+    state(conn, SSH_SFTP_QUOTE_STAT);
+    return;
+  }
+  if(strncasecompare(cmd, "ln ", 3) ||
+     strncasecompare(cmd, "symlink ", 8)) {
+    /* symbolic linking */
+    /* sshc->quote_path1 is the source */
+    /* get the destination */
+    result = Curl_get_pathname(&cp, &sshc->quote_path2, sshc->homedir);
+    if(result) {
+      if(result == CURLE_OUT_OF_MEMORY)
+        failf(data, "Out of memory");
+      else
+        failf(data, "Syntax error in ln/symlink: Bad second parameter");
+      Curl_safefree(sshc->quote_path1);
+      state(conn, SSH_SFTP_CLOSE);
+      sshc->nextstate = SSH_NO_STATE;
+      sshc->actualcode = result;
+      return;
+    }
+    state(conn, SSH_SFTP_QUOTE_SYMLINK);
+    return;
+  }
+  else if(strncasecompare(cmd, "mkdir ", 6)) {
+    /* create dir */
+    state(conn, SSH_SFTP_QUOTE_MKDIR);
+    return;
+  }
+  else if(strncasecompare(cmd, "rename ", 7)) {
+    /* rename file */
+    /* first param is the source path */
+    /* second param is the dest. path */
+    result = Curl_get_pathname(&cp, &sshc->quote_path2, sshc->homedir);
+    if(result) {
+      if(result == CURLE_OUT_OF_MEMORY)
+        failf(data, "Out of memory");
+      else
+        failf(data, "Syntax error in rename: Bad second parameter");
+      Curl_safefree(sshc->quote_path1);
+      state(conn, SSH_SFTP_CLOSE);
+      sshc->nextstate = SSH_NO_STATE;
+      sshc->actualcode = result;
+      return;
+    }
+    state(conn, SSH_SFTP_QUOTE_RENAME);
+    return;
+  }
+  else if(strncasecompare(cmd, "rmdir ", 6)) {
+    /* delete dir */
+    state(conn, SSH_SFTP_QUOTE_RMDIR);
+    return;
+  }
+  else if(strncasecompare(cmd, "rm ", 3)) {
+    state(conn, SSH_SFTP_QUOTE_UNLINK);
+    return;
+  }
+#ifdef HAS_STATVFS_SUPPORT
+  else if(strncasecompare(cmd, "statvfs ", 8)) {
+    state(conn, SSH_SFTP_QUOTE_STATVFS);
+    return;
+  }
+#endif
+
+  failf(data, "Unknown SFTP command");
+  Curl_safefree(sshc->quote_path1);
+  Curl_safefree(sshc->quote_path2);
+  state(conn, SSH_SFTP_CLOSE);
+  sshc->nextstate = SSH_NO_STATE;
+  sshc->actualcode = CURLE_QUOTE_ERROR;
+}
+
+static void sftp_quote_stat(struct connectdata *conn)
+{
+  struct Curl_easy *data = conn->data;
+  struct ssh_conn *sshc = &conn->proto.sshc;
+  char *cmd = sshc->quote_item->data;
+  sshc->acceptfail = FALSE;
+
+  /* if a command starts with an asterisk, which a legal SFTP command never
+     can, the command will be allowed to fail without it causing any
+     aborts or cancels etc. It will cause libcurl to act as if the command
+     is successful, whatever the server reponds. */
+
+  if(cmd[0] == '*') {
+    cmd++;
+    sshc->acceptfail = TRUE;
+  }
+
+  /* We read the file attributes, store them in sshc->quote_attrs
+   * and modify them accordingly to command. Then we switch to
+   * QUOTE_SETSTAT state to write new ones.
+   */
+
+  if(sshc->quote_attrs)
+    sftp_attributes_free(sshc->quote_attrs);
+  sshc->quote_attrs = sftp_stat(sshc->sftp_session, sshc->quote_path2);
+  if(sshc->quote_attrs == NULL) {
+    Curl_safefree(sshc->quote_path1);
+    Curl_safefree(sshc->quote_path2);
+    failf(data, "Attempt to get SFTP stats failed: %d",
+          sftp_get_error(sshc->sftp_session));
+    state(conn, SSH_SFTP_CLOSE);
+    sshc->nextstate = SSH_NO_STATE;
+    sshc->actualcode = CURLE_QUOTE_ERROR;
+    return;
+  }
+
+  /* Now set the new attributes... */
+  if(strncasecompare(cmd, "chgrp", 5)) {
+    sshc->quote_attrs->gid = (uint32_t)strtoul(sshc->quote_path1, NULL, 10);
+    if(sshc->quote_attrs->gid == 0 && !ISDIGIT(sshc->quote_path1[0]) &&
+        !sshc->acceptfail) {
+      Curl_safefree(sshc->quote_path1);
+      Curl_safefree(sshc->quote_path2);
+      failf(data, "Syntax error: chgrp gid not a number");
+      state(conn, SSH_SFTP_CLOSE);
+      sshc->nextstate = SSH_NO_STATE;
+      sshc->actualcode = CURLE_QUOTE_ERROR;
+      return;
+    }
+    sshc->quote_attrs->flags |= SSH_FILEXFER_ATTR_UIDGID;
+  }
+  else if(strncasecompare(cmd, "chmod", 5)) {
+    mode_t perms;
+    perms = (mode_t)strtoul(sshc->quote_path1, NULL, 8);
+    /* permissions are octal */
+    if(perms == 0 && !ISDIGIT(sshc->quote_path1[0])) {
+      Curl_safefree(sshc->quote_path1);
+      Curl_safefree(sshc->quote_path2);
+      failf(data, "Syntax error: chmod permissions not a number");
+      state(conn, SSH_SFTP_CLOSE);
+      sshc->nextstate = SSH_NO_STATE;
+      sshc->actualcode = CURLE_QUOTE_ERROR;
+      return;
+    }
+    sshc->quote_attrs->permissions = perms;
+    sshc->quote_attrs->flags |= SSH_FILEXFER_ATTR_PERMISSIONS;
+  }
+  else if(strncasecompare(cmd, "chown", 5)) {
+    sshc->quote_attrs->uid = (uint32_t)strtoul(sshc->quote_path1, NULL, 10);
+    if(sshc->quote_attrs->uid == 0 && !ISDIGIT(sshc->quote_path1[0]) &&
+        !sshc->acceptfail) {
+      Curl_safefree(sshc->quote_path1);
+      Curl_safefree(sshc->quote_path2);
+      failf(data, "Syntax error: chown uid not a number");
+      state(conn, SSH_SFTP_CLOSE);
+      sshc->nextstate = SSH_NO_STATE;
+      sshc->actualcode = CURLE_QUOTE_ERROR;
+      return;
+    }
+    sshc->quote_attrs->flags |= SSH_FILEXFER_ATTR_UIDGID;
+  }
+
+  /* Now send the completed structure... */
+  state(conn, SSH_SFTP_QUOTE_SETSTAT);
+  return;
+}
+
+
+#endif                          /* USE_LIBSSH */
diff --git a/lib/vssh/libssh2.c b/lib/vssh/libssh2.c
new file mode 100644
index 000000000..5dd6ee29e
--- /dev/null
+++ b/lib/vssh/libssh2.c
@@ -0,0 +1,3323 @@
+/***************************************************************************
+ *                                  _   _ ____  _
+ *  Project                     ___| | | |  _ \| |
+ *                             / __| | | | |_) | |
+ *                            | (__| |_| |  _ <| |___
+ *                             \___|\___/|_| \_\_____|
+ *
+ * Copyright (C) 1998 - 2019, Daniel Stenberg, <daniel@haxx.se>, et al.
+ *
+ * This software is licensed as described in the file COPYING, which
+ * you should have received as part of this distribution. The terms
+ * are also available at https://curl.haxx.se/docs/copyright.html.
+ *
+ * You may opt to use, copy, modify, merge, publish, distribute and/or sell
+ * copies of the Software, and permit persons to whom the Software is
+ * furnished to do so, under the terms of the COPYING file.
+ *
+ * This software is distributed on an "AS IS" basis, WITHOUT WARRANTY OF ANY
+ * KIND, either express or implied.
+ *
+ ***************************************************************************/
+
+/* #define CURL_LIBSSH2_DEBUG */
+
+#include "curl_setup.h"
+
+#ifdef USE_LIBSSH2
+
+#include <limits.h>
+
+#include <libssh2.h>
+#include <libssh2_sftp.h>
+
+#ifdef HAVE_FCNTL_H
+#include <fcntl.h>
+#endif
+
+#ifdef HAVE_NETINET_IN_H
+#include <netinet/in.h>
+#endif
+#ifdef HAVE_ARPA_INET_H
+#include <arpa/inet.h>
+#endif
+#ifdef HAVE_UTSNAME_H
+#include <sys/utsname.h>
+#endif
+#ifdef HAVE_NETDB_H
+#include <netdb.h>
+#endif
+#ifdef __VMS
+#include <in.h>
+#include <inet.h>
+#endif
+
+#if (defined(NETWARE) && defined(__NOVELL_LIBC__))
+#undef in_addr_t
+#define in_addr_t unsigned long
+#endif
+
+#include <curl/curl.h>
+#include "urldata.h"
+#include "sendf.h"
+#include "hostip.h"
+#include "progress.h"
+#include "transfer.h"
+#include "escape.h"
+#include "http.h" /* for HTTP proxy tunnel stuff */
+#include "ssh.h"
+#include "url.h"
+#include "speedcheck.h"
+#include "getinfo.h"
+#include "strdup.h"
+#include "strcase.h"
+#include "vtls/vtls.h"
+#include "connect.h"
+#include "strerror.h"
+#include "inet_ntop.h"
+#include "parsedate.h" /* for the week day and month names */
+#include "sockaddr.h" /* required for Curl_sockaddr_storage */
+#include "strtoofft.h"
+#include "multiif.h"
+#include "select.h"
+#include "warnless.h"
+#include "curl_path.h"
+
+/* The last 3 #include files should be in this order */
+#include "curl_printf.h"
+#include "curl_memory.h"
+#include "memdebug.h"
+
+#if LIBSSH2_VERSION_NUM >= 0x010206
+/* libssh2_sftp_statvfs and friends were added in 1.2.6 */
+#define HAS_STATVFS_SUPPORT 1
+#endif
+
+#define sftp_libssh2_last_error(s) curlx_ultosi(libssh2_sftp_last_error(s))
+
+#define sftp_libssh2_realpath(s,p,t,m) \
+        libssh2_sftp_symlink_ex((s), (p), curlx_uztoui(strlen(p)), \
+                                (t), (m), LIBSSH2_SFTP_REALPATH)
+
+
+/* Local functions: */
+static const char *sftp_libssh2_strerror(int err);
+static LIBSSH2_ALLOC_FUNC(my_libssh2_malloc);
+static LIBSSH2_REALLOC_FUNC(my_libssh2_realloc);
+static LIBSSH2_FREE_FUNC(my_libssh2_free);
+
+static CURLcode ssh_connect(struct connectdata *conn, bool *done);
+static CURLcode ssh_multi_statemach(struct connectdata *conn, bool *done);
+static CURLcode ssh_do(struct connectdata *conn, bool *done);
+
+static CURLcode scp_done(struct connectdata *conn,
+                         CURLcode, bool premature);
+static CURLcode scp_doing(struct connectdata *conn,
+                          bool *dophase_done);
+static CURLcode scp_disconnect(struct connectdata *conn, bool dead_connection);
+
+static CURLcode sftp_done(struct connectdata *conn,
+                          CURLcode, bool premature);
+static CURLcode sftp_doing(struct connectdata *conn,
+                           bool *dophase_done);
+static CURLcode sftp_disconnect(struct connectdata *conn, bool dead);
+static
+CURLcode sftp_perform(struct connectdata *conn,
+                      bool *connected,
+                      bool *dophase_done);
+static int ssh_getsock(struct connectdata *conn, curl_socket_t *sock);
+static int ssh_perform_getsock(const struct connectdata *conn,
+                               curl_socket_t *sock);
+static CURLcode ssh_setup_connection(struct connectdata *conn);
+
+/*
+ * SCP protocol handler.
+ */
+
+const struct Curl_handler Curl_handler_scp = {
+  "SCP",                                /* scheme */
+  ssh_setup_connection,                 /* setup_connection */
+  ssh_do,                               /* do_it */
+  scp_done,                             /* done */
+  ZERO_NULL,                            /* do_more */
+  ssh_connect,                          /* connect_it */
+  ssh_multi_statemach,                  /* connecting */
+  scp_doing,                            /* doing */
+  ssh_getsock,                          /* proto_getsock */
+  ssh_getsock,                          /* doing_getsock */
+  ZERO_NULL,                            /* domore_getsock */
+  ssh_perform_getsock,                  /* perform_getsock */
+  scp_disconnect,                       /* disconnect */
+  ZERO_NULL,                            /* readwrite */
+  ZERO_NULL,                            /* connection_check */
+  PORT_SSH,                             /* defport */
+  CURLPROTO_SCP,                        /* protocol */
+  PROTOPT_DIRLOCK | PROTOPT_CLOSEACTION
+  | PROTOPT_NOURLQUERY                  /* flags */
+};
+
+
+/*
+ * SFTP protocol handler.
+ */
+
+const struct Curl_handler Curl_handler_sftp = {
+  "SFTP",                               /* scheme */
+  ssh_setup_connection,                 /* setup_connection */
+  ssh_do,                               /* do_it */
+  sftp_done,                            /* done */
+  ZERO_NULL,                            /* do_more */
+  ssh_connect,                          /* connect_it */
+  ssh_multi_statemach,                  /* connecting */
+  sftp_doing,                           /* doing */
+  ssh_getsock,                          /* proto_getsock */
+  ssh_getsock,                          /* doing_getsock */
+  ZERO_NULL,                            /* domore_getsock */
+  ssh_perform_getsock,                  /* perform_getsock */
+  sftp_disconnect,                      /* disconnect */
+  ZERO_NULL,                            /* readwrite */
+  ZERO_NULL,                            /* connection_check */
+  PORT_SSH,                             /* defport */
+  CURLPROTO_SFTP,                       /* protocol */
+  PROTOPT_DIRLOCK | PROTOPT_CLOSEACTION
+  | PROTOPT_NOURLQUERY                  /* flags */
+};
+
+static void
+kbd_callback(const char *name, int name_len, const char *instruction,
+             int instruction_len, int num_prompts,
+             const LIBSSH2_USERAUTH_KBDINT_PROMPT *prompts,
+             LIBSSH2_USERAUTH_KBDINT_RESPONSE *responses,
+             void **abstract)
+{
+  struct connectdata *conn = (struct connectdata *)*abstract;
+
+#ifdef CURL_LIBSSH2_DEBUG
+  fprintf(stderr, "name=%s\n", name);
+  fprintf(stderr, "name_len=%d\n", name_len);
+  fprintf(stderr, "instruction=%s\n", instruction);
+  fprintf(stderr, "instruction_len=%d\n", instruction_len);
+  fprintf(stderr, "num_prompts=%d\n", num_prompts);
+#else
+  (void)name;
+  (void)name_len;
+  (void)instruction;
+  (void)instruction_len;
+#endif  /* CURL_LIBSSH2_DEBUG */
+  if(num_prompts == 1) {
+    responses[0].text = strdup(conn->passwd);
+    responses[0].length = curlx_uztoui(strlen(conn->passwd));
+  }
+  (void)prompts;
+  (void)abstract;
+} /* kbd_callback */
+
+static CURLcode sftp_libssh2_error_to_CURLE(int err)
+{
+  switch(err) {
+    case LIBSSH2_FX_OK:
+      return CURLE_OK;
+
+    case LIBSSH2_FX_NO_SUCH_FILE:
+    case LIBSSH2_FX_NO_SUCH_PATH:
+      return CURLE_REMOTE_FILE_NOT_FOUND;
+
+    case LIBSSH2_FX_PERMISSION_DENIED:
+    case LIBSSH2_FX_WRITE_PROTECT:
+    case LIBSSH2_FX_LOCK_CONFlICT:
+      return CURLE_REMOTE_ACCESS_DENIED;
+
+    case LIBSSH2_FX_NO_SPACE_ON_FILESYSTEM:
+    case LIBSSH2_FX_QUOTA_EXCEEDED:
+      return CURLE_REMOTE_DISK_FULL;
+
+    case LIBSSH2_FX_FILE_ALREADY_EXISTS:
+      return CURLE_REMOTE_FILE_EXISTS;
+
+    case LIBSSH2_FX_DIR_NOT_EMPTY:
+      return CURLE_QUOTE_ERROR;
+
+    default:
+      break;
+  }
+
+  return CURLE_SSH;
+}
+
+static CURLcode libssh2_session_error_to_CURLE(int err)
+{
+  switch(err) {
+    /* Ordered by order of appearance in libssh2.h */
+    case LIBSSH2_ERROR_NONE:
+      return CURLE_OK;
+
+    /* This is the error returned by libssh2_scp_recv2
+     * on unknown file */
+    case LIBSSH2_ERROR_SCP_PROTOCOL:
+      return CURLE_REMOTE_FILE_NOT_FOUND;
+
+    case LIBSSH2_ERROR_SOCKET_NONE:
+      return CURLE_COULDNT_CONNECT;
+
+    case LIBSSH2_ERROR_ALLOC:
+      return CURLE_OUT_OF_MEMORY;
+
+    case LIBSSH2_ERROR_SOCKET_SEND:
+      return CURLE_SEND_ERROR;
+
+    case LIBSSH2_ERROR_HOSTKEY_INIT:
+    case LIBSSH2_ERROR_HOSTKEY_SIGN:
+    case LIBSSH2_ERROR_PUBLICKEY_UNRECOGNIZED:
+    case LIBSSH2_ERROR_PUBLICKEY_UNVERIFIED:
+      return CURLE_PEER_FAILED_VERIFICATION;
+
+    case LIBSSH2_ERROR_PASSWORD_EXPIRED:
+      return CURLE_LOGIN_DENIED;
+
+    case LIBSSH2_ERROR_SOCKET_TIMEOUT:
+    case LIBSSH2_ERROR_TIMEOUT:
+      return CURLE_OPERATION_TIMEDOUT;
+
+    case LIBSSH2_ERROR_EAGAIN:
+      return CURLE_AGAIN;
+  }
+
+  return CURLE_SSH;
+}
+
+static LIBSSH2_ALLOC_FUNC(my_libssh2_malloc)
+{
+  (void)abstract; /* arg not used */
+  return malloc(count);
+}
+
+static LIBSSH2_REALLOC_FUNC(my_libssh2_realloc)
+{
+  (void)abstract; /* arg not used */
+  return realloc(ptr, count);
+}
+
+static LIBSSH2_FREE_FUNC(my_libssh2_free)
+{
+  (void)abstract; /* arg not used */
+  if(ptr) /* ssh2 agent sometimes call free with null ptr */
+    free(ptr);
+}
+
+/*
+ * SSH State machine related code
+ */
+/* This is the ONLY way to change SSH state! */
+static void state(struct connectdata *conn, sshstate nowstate)
+{
+  struct ssh_conn *sshc = &conn->proto.sshc;
+#if defined(DEBUGBUILD) && !defined(CURL_DISABLE_VERBOSE_STRINGS)
+  /* for debug purposes */
+  static const char * const names[] = {
+    "SSH_STOP",
+    "SSH_INIT",
+    "SSH_S_STARTUP",
+    "SSH_HOSTKEY",
+    "SSH_AUTHLIST",
+    "SSH_AUTH_PKEY_INIT",
+    "SSH_AUTH_PKEY",
+    "SSH_AUTH_PASS_INIT",
+    "SSH_AUTH_PASS",
+    "SSH_AUTH_AGENT_INIT",
+    "SSH_AUTH_AGENT_LIST",
+    "SSH_AUTH_AGENT",
+    "SSH_AUTH_HOST_INIT",
+    "SSH_AUTH_HOST",
+    "SSH_AUTH_KEY_INIT",
+    "SSH_AUTH_KEY",
+    "SSH_AUTH_GSSAPI",
+    "SSH_AUTH_DONE",
+    "SSH_SFTP_INIT",
+    "SSH_SFTP_REALPATH",
+    "SSH_SFTP_QUOTE_INIT",
+    "SSH_SFTP_POSTQUOTE_INIT",
+    "SSH_SFTP_QUOTE",
+    "SSH_SFTP_NEXT_QUOTE",
+    "SSH_SFTP_QUOTE_STAT",
+    "SSH_SFTP_QUOTE_SETSTAT",
+    "SSH_SFTP_QUOTE_SYMLINK",
+    "SSH_SFTP_QUOTE_MKDIR",
+    "SSH_SFTP_QUOTE_RENAME",
+    "SSH_SFTP_QUOTE_RMDIR",
+    "SSH_SFTP_QUOTE_UNLINK",
+    "SSH_SFTP_QUOTE_STATVFS",
+    "SSH_SFTP_GETINFO",
+    "SSH_SFTP_FILETIME",
+    "SSH_SFTP_TRANS_INIT",
+    "SSH_SFTP_UPLOAD_INIT",
+    "SSH_SFTP_CREATE_DIRS_INIT",
+    "SSH_SFTP_CREATE_DIRS",
+    "SSH_SFTP_CREATE_DIRS_MKDIR",
+    "SSH_SFTP_READDIR_INIT",
+    "SSH_SFTP_READDIR",
+    "SSH_SFTP_READDIR_LINK",
+    "SSH_SFTP_READDIR_BOTTOM",
+    "SSH_SFTP_READDIR_DONE",
+    "SSH_SFTP_DOWNLOAD_INIT",
+    "SSH_SFTP_DOWNLOAD_STAT",
+    "SSH_SFTP_CLOSE",
+    "SSH_SFTP_SHUTDOWN",
+    "SSH_SCP_TRANS_INIT",
+    "SSH_SCP_UPLOAD_INIT",
+    "SSH_SCP_DOWNLOAD_INIT",
+    "SSH_SCP_DOWNLOAD",
+    "SSH_SCP_DONE",
+    "SSH_SCP_SEND_EOF",
+    "SSH_SCP_WAIT_EOF",
+    "SSH_SCP_WAIT_CLOSE",
+    "SSH_SCP_CHANNEL_FREE",
+    "SSH_SESSION_DISCONNECT",
+    "SSH_SESSION_FREE",
+    "QUIT"
+  };
+
+  /* a precaution to make sure the lists are in sync */
+  DEBUGASSERT(sizeof(names)/sizeof(names[0]) == SSH_LAST);
+
+  if(sshc->state != nowstate) {
+    infof(conn->data, "SFTP %p state change from %s to %s\n",
+          (void *)sshc, names[sshc->state], names[nowstate]);
+  }
+#endif
+
+  sshc->state = nowstate;
+}
+
+
+#ifdef HAVE_LIBSSH2_KNOWNHOST_API
+static int sshkeycallback(struct Curl_easy *easy,
+                          const struct curl_khkey *knownkey, /* known */
+                          const struct curl_khkey *foundkey, /* found */
+                          enum curl_khmatch match,
+                          void *clientp)
+{
+  (void)easy;
+  (void)knownkey;
+  (void)foundkey;
+  (void)clientp;
+
+  /* we only allow perfect matches, and we reject everything else */
+  return (match != CURLKHMATCH_OK)?CURLKHSTAT_REJECT:CURLKHSTAT_FINE;
+}
+#endif
+
+/*
+ * Earlier libssh2 versions didn't have the ability to seek to 64bit positions
+ * with 32bit size_t.
+ */
+#ifdef HAVE_LIBSSH2_SFTP_SEEK64
+#define SFTP_SEEK(x,y) libssh2_sftp_seek64(x, (libssh2_uint64_t)y)
+#else
+#define SFTP_SEEK(x,y) libssh2_sftp_seek(x, (size_t)y)
+#endif
+
+/*
+ * Earlier libssh2 versions didn't do SCP properly beyond 32bit sizes on 32bit
+ * architectures so we check of the necessary function is present.
+ */
+#ifndef HAVE_LIBSSH2_SCP_SEND64
+#define SCP_SEND(a,b,c,d) libssh2_scp_send_ex(a, b, (int)(c), (size_t)d, 0, 0)
+#else
+#define SCP_SEND(a,b,c,d) libssh2_scp_send64(a, b, (int)(c),            \
+                                             (libssh2_uint64_t)d, 0, 0)
+#endif
+
+/*
+ * libssh2 1.2.8 fixed the problem with 32bit ints used for sockets on win64.
+ */
+#ifdef HAVE_LIBSSH2_SESSION_HANDSHAKE
+#define libssh2_session_startup(x,y) libssh2_session_handshake(x,y)
+#endif
+
+static CURLcode ssh_knownhost(struct connectdata *conn)
+{
+  CURLcode result = CURLE_OK;
+
+#ifdef HAVE_LIBSSH2_KNOWNHOST_API
+  struct Curl_easy *data = conn->data;
+
+  if(data->set.str[STRING_SSH_KNOWNHOSTS]) {
+    /* we're asked to verify the host against a file */
+    struct ssh_conn *sshc = &conn->proto.sshc;
+    int rc;
+    int keytype;
+    size_t keylen;
+    const char *remotekey = libssh2_session_hostkey(sshc->ssh_session,
+                                                    &keylen, &keytype);
+    int keycheck = LIBSSH2_KNOWNHOST_CHECK_FAILURE;
+    int keybit = 0;
+
+    if(remotekey) {
+      /*
+       * A subject to figure out is what host name we need to pass in here.
+       * What host name does OpenSSH store in its file if an IDN name is
+       * used?
+       */
+      struct libssh2_knownhost *host;
+      enum curl_khmatch keymatch;
+      curl_sshkeycallback func =
+        data->set.ssh_keyfunc?data->set.ssh_keyfunc:sshkeycallback;
+      struct curl_khkey knownkey;
+      struct curl_khkey *knownkeyp = NULL;
+      struct curl_khkey foundkey;
+
+      keybit = (keytype == LIBSSH2_HOSTKEY_TYPE_RSA)?
+        LIBSSH2_KNOWNHOST_KEY_SSHRSA:LIBSSH2_KNOWNHOST_KEY_SSHDSS;
+
+#ifdef HAVE_LIBSSH2_KNOWNHOST_CHECKP
+      keycheck = libssh2_knownhost_checkp(sshc->kh,
+                                          conn->host.name,
+                                          (conn->remote_port != PORT_SSH)?
+                                          conn->remote_port:-1,
+                                          remotekey, keylen,
+                                          LIBSSH2_KNOWNHOST_TYPE_PLAIN|
+                                          LIBSSH2_KNOWNHOST_KEYENC_RAW|
+                                          keybit,
+                                          &host);
+#else
+      keycheck = libssh2_knownhost_check(sshc->kh,
+                                         conn->host.name,
+                                         remotekey, keylen,
+                                         LIBSSH2_KNOWNHOST_TYPE_PLAIN|
+                                         LIBSSH2_KNOWNHOST_KEYENC_RAW|
+                                         keybit,
+                                         &host);
+#endif
+
+      infof(data, "SSH host check: %d, key: %s\n", keycheck,
+            (keycheck <= LIBSSH2_KNOWNHOST_CHECK_MISMATCH)?
+            host->key:"<none>");
+
+      /* setup 'knownkey' */
+      if(keycheck <= LIBSSH2_KNOWNHOST_CHECK_MISMATCH) {
+        knownkey.key = host->key;
+        knownkey.len = 0;
+        knownkey.keytype = (keytype == LIBSSH2_HOSTKEY_TYPE_RSA)?
+          CURLKHTYPE_RSA : CURLKHTYPE_DSS;
+        knownkeyp = &knownkey;
+      }
+
+      /* setup 'foundkey' */
+      foundkey.key = remotekey;
+      foundkey.len = keylen;
+      foundkey.keytype = (keytype == LIBSSH2_HOSTKEY_TYPE_RSA)?
+        CURLKHTYPE_RSA : CURLKHTYPE_DSS;
+
+      /*
+       * if any of the LIBSSH2_KNOWNHOST_CHECK_* defines and the
+       * curl_khmatch enum are ever modified, we need to introduce a
+       * translation table here!
+       */
+      keymatch = (enum curl_khmatch)keycheck;
+
+      /* Ask the callback how to behave */
+      Curl_set_in_callback(data, true);
+      rc = func(data, knownkeyp, /* from the knownhosts file */
+                &foundkey, /* from the remote host */
+                keymatch, data->set.ssh_keyfunc_userp);
+      Curl_set_in_callback(data, false);
+    }
+    else
+      /* no remotekey means failure! */
+      rc = CURLKHSTAT_REJECT;
+
+    switch(rc) {
+    default: /* unknown return codes will equal reject */
+      /* FALLTHROUGH */
+    case CURLKHSTAT_REJECT:
+      state(conn, SSH_SESSION_FREE);
+      /* FALLTHROUGH */
+    case CURLKHSTAT_DEFER:
+      /* DEFER means bail out but keep the SSH_HOSTKEY state */
+      result = sshc->actualcode = CURLE_PEER_FAILED_VERIFICATION;
+      break;
+    case CURLKHSTAT_FINE:
+    case CURLKHSTAT_FINE_ADD_TO_FILE:
+      /* proceed */
+      if(keycheck != LIBSSH2_KNOWNHOST_CHECK_MATCH) {
+        /* the found host+key didn't match but has been told to be fine
+           anyway so we add it in memory */
+        int addrc = libssh2_knownhost_add(sshc->kh,
+                                          conn->host.name, NULL,
+                                          remotekey, keylen,
+                                          LIBSSH2_KNOWNHOST_TYPE_PLAIN|
+                                          LIBSSH2_KNOWNHOST_KEYENC_RAW|
+                                          keybit, NULL);
+        if(addrc)
+          infof(data, "Warning adding the known host %s failed!\n",
+                conn->host.name);
+        else if(rc == CURLKHSTAT_FINE_ADD_TO_FILE) {
+          /* now we write the entire in-memory list of known hosts to the
+             known_hosts file */
+          int wrc =
+            libssh2_knownhost_writefile(sshc->kh,
+                                        data->set.str[STRING_SSH_KNOWNHOSTS],
+                                        LIBSSH2_KNOWNHOST_FILE_OPENSSH);
+          if(wrc) {
+            infof(data, "Warning, writing %s failed!\n",
+                  data->set.str[STRING_SSH_KNOWNHOSTS]);
+          }
+        }
+      }
+      break;
+    }
+  }
+#else /* HAVE_LIBSSH2_KNOWNHOST_API */
+  (void)conn;
+#endif
+  return result;
+}
+
+static CURLcode ssh_check_fingerprint(struct connectdata *conn)
+{
+  struct ssh_conn *sshc = &conn->proto.sshc;
+  struct Curl_easy *data = conn->data;
+  const char *pubkey_md5 = data->set.str[STRING_SSH_HOST_PUBLIC_KEY_MD5];
+  char md5buffer[33];
+
+  const char *fingerprint = libssh2_hostkey_hash(sshc->ssh_session,
+      LIBSSH2_HOSTKEY_HASH_MD5);
+
+  if(fingerprint) {
+    /* The fingerprint points to static storage (!), don't free() it. */
+    int i;
+    for(i = 0; i < 16; i++)
+      msnprintf(&md5buffer[i*2], 3, "%02x", (unsigned char) fingerprint[i]);
+    infof(data, "SSH MD5 fingerprint: %s\n", md5buffer);
+  }
+
+  /* Before we authenticate we check the hostkey's MD5 fingerprint
+   * against a known fingerprint, if available.
+   */
+  if(pubkey_md5 && strlen(pubkey_md5) == 32) {
+    if(!fingerprint || !strcasecompare(md5buffer, pubkey_md5)) {
+      if(fingerprint)
+        failf(data,
+            "Denied establishing ssh session: mismatch md5 fingerprint. "
+            "Remote %s is not equal to %s", md5buffer, pubkey_md5);
+      else
+        failf(data,
+            "Denied establishing ssh session: md5 fingerprint not available");
+      state(conn, SSH_SESSION_FREE);
+      sshc->actualcode = CURLE_PEER_FAILED_VERIFICATION;
+      return sshc->actualcode;
+    }
+    infof(data, "MD5 checksum match!\n");
+    /* as we already matched, we skip the check for known hosts */
+    return CURLE_OK;
+  }
+  return ssh_knownhost(conn);
+}
+
+/*
+ * ssh_statemach_act() runs the SSH state machine as far as it can without
+ * blocking and without reaching the end.  The data the pointer 'block' points
+ * to will be set to TRUE if the libssh2 function returns LIBSSH2_ERROR_EAGAIN
+ * meaning it wants to be called again when the socket is ready
+ */
+
+static CURLcode ssh_statemach_act(struct connectdata *conn, bool *block)
+{
+  CURLcode result = CURLE_OK;
+  struct Curl_easy *data = conn->data;
+  struct SSHPROTO *sftp_scp = data->req.protop;
+  struct ssh_conn *sshc = &conn->proto.sshc;
+  curl_socket_t sock = conn->sock[FIRSTSOCKET];
+  char *new_readdir_line;
+  int rc = LIBSSH2_ERROR_NONE;
+  int err;
+  int seekerr = CURL_SEEKFUNC_OK;
+  *block = 0; /* we're not blocking by default */
+
+  do {
+
+    switch(sshc->state) {
+    case SSH_INIT:
+      sshc->secondCreateDirs = 0;
+      sshc->nextstate = SSH_NO_STATE;
+      sshc->actualcode = CURLE_OK;
+
+      /* Set libssh2 to non-blocking, since everything internally is
+         non-blocking */
+      libssh2_session_set_blocking(sshc->ssh_session, 0);
+
+      state(conn, SSH_S_STARTUP);
+      /* FALLTHROUGH */
+
+    case SSH_S_STARTUP:
+      rc = libssh2_session_startup(sshc->ssh_session, (int)sock);
+      if(rc == LIBSSH2_ERROR_EAGAIN) {
+        break;
+      }
+      if(rc) {
+        char *err_msg = NULL;
+        (void)libssh2_session_last_error(sshc->ssh_session, &err_msg, NULL, 0);
+        failf(data, "Failure establishing ssh session: %d, %s", rc, err_msg);
+
+        state(conn, SSH_SESSION_FREE);
+        sshc->actualcode = CURLE_FAILED_INIT;
+        break;
+      }
+
+      state(conn, SSH_HOSTKEY);
+
+      /* FALLTHROUGH */
+    case SSH_HOSTKEY:
+      /*
+       * Before we authenticate we should check the hostkey's fingerprint
+       * against our known hosts. How that is handled (reading from file,
+       * whatever) is up to us.
+       */
+      result = ssh_check_fingerprint(conn);
+      if(!result)
+        state(conn, SSH_AUTHLIST);
+      /* ssh_check_fingerprint sets state appropriately on error */
+      break;
+
+    case SSH_AUTHLIST:
+      /*
+       * Figure out authentication methods
+       * NB: As soon as we have provided a username to an openssh server we
+       * must never change it later. Thus, always specify the correct username
+       * here, even though the libssh2 docs kind of indicate that it should be
+       * possible to get a 'generic' list (not user-specific) of authentication
+       * methods, presumably with a blank username. That won't work in my
+       * experience.
+       * So always specify it here.
+       */
+      sshc->authlist = libssh2_userauth_list(sshc->ssh_session,
+                                             conn->user,
+                                             curlx_uztoui(strlen(conn->user)));
+
+      if(!sshc->authlist) {
+        if(libssh2_userauth_authenticated(sshc->ssh_session)) {
+          sshc->authed = TRUE;
+          infof(data, "SSH user accepted with no authentication\n");
+          state(conn, SSH_AUTH_DONE);
+          break;
+        }
+        err = libssh2_session_last_errno(sshc->ssh_session);
+        if(err == LIBSSH2_ERROR_EAGAIN)
+          rc = LIBSSH2_ERROR_EAGAIN;
+        else {
+          state(conn, SSH_SESSION_FREE);
+          sshc->actualcode = libssh2_session_error_to_CURLE(err);
+        }
+        break;
+      }
+      infof(data, "SSH authentication methods available: %s\n",
+            sshc->authlist);
+
+      state(conn, SSH_AUTH_PKEY_INIT);
+      break;
+
+    case SSH_AUTH_PKEY_INIT:
+      /*
+       * Check the supported auth types in the order I feel is most secure
+       * with the requested type of authentication
+       */
+      sshc->authed = FALSE;
+
+      if((data->set.ssh_auth_types & CURLSSH_AUTH_PUBLICKEY) &&
+         (strstr(sshc->authlist, "publickey") != NULL)) {
+        bool out_of_memory = FALSE;
+
+        sshc->rsa_pub = sshc->rsa = NULL;
+
+        if(data->set.str[STRING_SSH_PRIVATE_KEY])
+          sshc->rsa = strdup(data->set.str[STRING_SSH_PRIVATE_KEY]);
+        else {
+          /* To ponder about: should really the lib be messing about with the
+             HOME environment variable etc? */
+          char *home = curl_getenv("HOME");
+
+          /* If no private key file is specified, try some common paths. */
+          if(home) {
+            /* Try ~/.ssh first. */
+            sshc->rsa = aprintf("%s/.ssh/id_rsa", home);
+            if(!sshc->rsa)
+              out_of_memory = TRUE;
+            else if(access(sshc->rsa, R_OK) != 0) {
+              Curl_safefree(sshc->rsa);
+              sshc->rsa = aprintf("%s/.ssh/id_dsa", home);
+              if(!sshc->rsa)
+                out_of_memory = TRUE;
+              else if(access(sshc->rsa, R_OK) != 0) {
+                Curl_safefree(sshc->rsa);
+              }
+            }
+            free(home);
+          }
+          if(!out_of_memory && !sshc->rsa) {
+            /* Nothing found; try the current dir. */
+            sshc->rsa = strdup("id_rsa");
+            if(sshc->rsa && access(sshc->rsa, R_OK) != 0) {
+              Curl_safefree(sshc->rsa);
+              sshc->rsa = strdup("id_dsa");
+              if(sshc->rsa && access(sshc->rsa, R_OK) != 0) {
+                Curl_safefree(sshc->rsa);
+                /* Out of guesses. Set to the empty string to avoid
+                 * surprising info messages. */
+                sshc->rsa = strdup("");
+              }
+            }
+          }
+        }
+
+        /*
+         * Unless the user explicitly specifies a public key file, let
+         * libssh2 extract the public key from the private key file.
+         * This is done by simply passing sshc->rsa_pub = NULL.
+         */
+        if(data->set.str[STRING_SSH_PUBLIC_KEY]
+           /* treat empty string the same way as NULL */
+           && data->set.str[STRING_SSH_PUBLIC_KEY][0]) {
+          sshc->rsa_pub = strdup(data->set.str[STRING_SSH_PUBLIC_KEY]);
+          if(!sshc->rsa_pub)
+            out_of_memory = TRUE;
+        }
+
+        if(out_of_memory || sshc->rsa == NULL) {
+          Curl_safefree(sshc->rsa);
+          Curl_safefree(sshc->rsa_pub);
+          state(conn, SSH_SESSION_FREE);
+          sshc->actualcode = CURLE_OUT_OF_MEMORY;
+          break;
+        }
+
+        sshc->passphrase = data->set.ssl.key_passwd;
+        if(!sshc->passphrase)
+          sshc->passphrase = "";
+
+        if(sshc->rsa_pub)
+          infof(data, "Using SSH public key file '%s'\n", sshc->rsa_pub);
+        infof(data, "Using SSH private key file '%s'\n", sshc->rsa);
+
+        state(conn, SSH_AUTH_PKEY);
+      }
+      else {
+        state(conn, SSH_AUTH_PASS_INIT);
+      }
+      break;
+
+    case SSH_AUTH_PKEY:
+      /* The function below checks if the files exists, no need to stat() here.
+       */
+      rc = libssh2_userauth_publickey_fromfile_ex(sshc->ssh_session,
+                                                  conn->user,
+                                                  curlx_uztoui(
+                                                    strlen(conn->user)),
+                                                  sshc->rsa_pub,
+                                                  sshc->rsa, sshc->passphrase);
+      if(rc == LIBSSH2_ERROR_EAGAIN) {
+        break;
+      }
+
+      Curl_safefree(sshc->rsa_pub);
+      Curl_safefree(sshc->rsa);
+
+      if(rc == 0) {
+        sshc->authed = TRUE;
+        infof(data, "Initialized SSH public key authentication\n");
+        state(conn, SSH_AUTH_DONE);
+      }
+      else {
+        char *err_msg = NULL;
+        (void)libssh2_session_last_error(sshc->ssh_session,
+                                         &err_msg, NULL, 0);
+        infof(data, "SSH public key authentication failed: %s\n", err_msg);
+        state(conn, SSH_AUTH_PASS_INIT);
+        rc = 0; /* clear rc and continue */
+      }
+      break;
+
+    case SSH_AUTH_PASS_INIT:
+      if((data->set.ssh_auth_types & CURLSSH_AUTH_PASSWORD) &&
+         (strstr(sshc->authlist, "password") != NULL)) {
+        state(conn, SSH_AUTH_PASS);
+      }
+      else {
+        state(conn, SSH_AUTH_HOST_INIT);
+        rc = 0; /* clear rc and continue */
+      }
+      break;
+
+    case SSH_AUTH_PASS:
+      rc = libssh2_userauth_password_ex(sshc->ssh_session, conn->user,
+                                        curlx_uztoui(strlen(conn->user)),
+                                        conn->passwd,
+                                        curlx_uztoui(strlen(conn->passwd)),
+                                        NULL);
+      if(rc == LIBSSH2_ERROR_EAGAIN) {
+        break;
+      }
+      if(rc == 0) {
+        sshc->authed = TRUE;
+        infof(data, "Initialized password authentication\n");
+        state(conn, SSH_AUTH_DONE);
+      }
+      else {
+        state(conn, SSH_AUTH_HOST_INIT);
+        rc = 0; /* clear rc and continue */
+      }
+      break;
+
+    case SSH_AUTH_HOST_INIT:
+      if((data->set.ssh_auth_types & CURLSSH_AUTH_HOST) &&
+         (strstr(sshc->authlist, "hostbased") != NULL)) {
+        state(conn, SSH_AUTH_HOST);
+      }
+      else {
+        state(conn, SSH_AUTH_AGENT_INIT);
+      }
+      break;
+
+    case SSH_AUTH_HOST:
+      state(conn, SSH_AUTH_AGENT_INIT);
+      break;
+
+    case SSH_AUTH_AGENT_INIT:
+#ifdef HAVE_LIBSSH2_AGENT_API
+      if((data->set.ssh_auth_types & CURLSSH_AUTH_AGENT)
+         && (strstr(sshc->authlist, "publickey") != NULL)) {
+
+        /* Connect to the ssh-agent */
+        /* The agent could be shared by a curl thread i believe
+           but nothing obvious as keys can be added/removed at any time */
+        if(!sshc->ssh_agent) {
+          sshc->ssh_agent = libssh2_agent_init(sshc->ssh_session);
+          if(!sshc->ssh_agent) {
+            infof(data, "Could not create agent object\n");
+
+            state(conn, SSH_AUTH_KEY_INIT);
+            break;
+          }
+        }
+
+        rc = libssh2_agent_connect(sshc->ssh_agent);
+        if(rc == LIBSSH2_ERROR_EAGAIN)
+          break;
+        if(rc < 0) {
+          infof(data, "Failure connecting to agent\n");
+          state(conn, SSH_AUTH_KEY_INIT);
+          rc = 0; /* clear rc and continue */
+        }
+        else {
+          state(conn, SSH_AUTH_AGENT_LIST);
+        }
+      }
+      else
+#endif /* HAVE_LIBSSH2_AGENT_API */
+        state(conn, SSH_AUTH_KEY_INIT);
+      break;
+
+    case SSH_AUTH_AGENT_LIST:
+#ifdef HAVE_LIBSSH2_AGENT_API
+      rc = libssh2_agent_list_identities(sshc->ssh_agent);
+
+      if(rc == LIBSSH2_ERROR_EAGAIN)
+        break;
+      if(rc < 0) {
+        infof(data, "Failure requesting identities to agent\n");
+        state(conn, SSH_AUTH_KEY_INIT);
+        rc = 0; /* clear rc and continue */
+      }
+      else {
+        state(conn, SSH_AUTH_AGENT);
+        sshc->sshagent_prev_identity = NULL;
+      }
+#endif
+      break;
+
+    case SSH_AUTH_AGENT:
+#ifdef HAVE_LIBSSH2_AGENT_API
+      /* as prev_identity evolves only after an identity user auth finished we
+         can safely request it again as long as EAGAIN is returned here or by
+         libssh2_agent_userauth */
+      rc = libssh2_agent_get_identity(sshc->ssh_agent,
+                                      &sshc->sshagent_identity,
+                                      sshc->sshagent_prev_identity);
+      if(rc == LIBSSH2_ERROR_EAGAIN)
+        break;
+
+      if(rc == 0) {
+        rc = libssh2_agent_userauth(sshc->ssh_agent, conn->user,
+                                    sshc->sshagent_identity);
+
+        if(rc < 0) {
+          if(rc != LIBSSH2_ERROR_EAGAIN) {
+            /* tried and failed? go to next identity */
+            sshc->sshagent_prev_identity = sshc->sshagent_identity;
+          }
+          break;
+        }
+      }
+
+      if(rc < 0)
+        infof(data, "Failure requesting identities to agent\n");
+      else if(rc == 1)
+        infof(data, "No identity would match\n");
+
+      if(rc == LIBSSH2_ERROR_NONE) {
+        sshc->authed = TRUE;
+        infof(data, "Agent based authentication successful\n");
+        state(conn, SSH_AUTH_DONE);
+      }
+      else {
+        state(conn, SSH_AUTH_KEY_INIT);
+        rc = 0; /* clear rc and continue */
+      }
+#endif
+      break;
+
+    case SSH_AUTH_KEY_INIT:
+      if((data->set.ssh_auth_types & CURLSSH_AUTH_KEYBOARD)
+         && (strstr(sshc->authlist, "keyboard-interactive") != NULL)) {
+        state(conn, SSH_AUTH_KEY);
+      }
+      else {
+        state(conn, SSH_AUTH_DONE);
+      }
+      break;
+
+    case SSH_AUTH_KEY:
+      /* Authentication failed. Continue with keyboard-interactive now. */
+      rc = libssh2_userauth_keyboard_interactive_ex(sshc->ssh_session,
+                                                    conn->user,
+                                                    curlx_uztoui(
+                                                      strlen(conn->user)),
+                                                    &kbd_callback);
+      if(rc == LIBSSH2_ERROR_EAGAIN) {
+        break;
+      }
+      if(rc == 0) {
+        sshc->authed = TRUE;
+        infof(data, "Initialized keyboard interactive authentication\n");
+      }
+      state(conn, SSH_AUTH_DONE);
+      break;
+
+    case SSH_AUTH_DONE:
+      if(!sshc->authed) {
+        failf(data, "Authentication failure");
+        state(conn, SSH_SESSION_FREE);
+        sshc->actualcode = CURLE_LOGIN_DENIED;
+        break;
+      }
+
+      /*
+       * At this point we have an authenticated ssh session.
+       */
+      infof(data, "Authentication complete\n");
+
+      Curl_pgrsTime(conn->data, TIMER_APPCONNECT); /* SSH is connected */
+
+      conn->sockfd = sock;
+      conn->writesockfd = CURL_SOCKET_BAD;
+
+      if(conn->handler->protocol == CURLPROTO_SFTP) {
+        state(conn, SSH_SFTP_INIT);
+        break;
+      }
+      infof(data, "SSH CONNECT phase done\n");
+      state(conn, SSH_STOP);
+      break;
+
+    case SSH_SFTP_INIT:
+      /*
+       * Start the libssh2 sftp session
+       */
+      sshc->sftp_session = libssh2_sftp_init(sshc->ssh_session);
+      if(!sshc->sftp_session) {
+        char *err_msg = NULL;
+        if(libssh2_session_last_errno(sshc->ssh_session) ==
+           LIBSSH2_ERROR_EAGAIN) {
+          rc = LIBSSH2_ERROR_EAGAIN;
+          break;
+        }
+
+        (void)libssh2_session_last_error(sshc->ssh_session,
+                                         &err_msg, NULL, 0);
+        failf(data, "Failure initializing sftp session: %s", err_msg);
+        state(conn, SSH_SESSION_FREE);
+        sshc->actualcode = CURLE_FAILED_INIT;
+        break;
+      }
+      state(conn, SSH_SFTP_REALPATH);
+      break;
+
+    case SSH_SFTP_REALPATH:
+    {
+      char tempHome[PATH_MAX];
+
+      /*
+       * Get the "home" directory
+       */
+      rc = sftp_libssh2_realpath(sshc->sftp_session, ".",
+                                 tempHome, PATH_MAX-1);
+      if(rc == LIBSSH2_ERROR_EAGAIN) {
+        break;
+      }
+      if(rc > 0) {
+        /* It seems that this string is not always NULL terminated */
+        tempHome[rc] = '\0';
+        sshc->homedir = strdup(tempHome);
+        if(!sshc->homedir) {
+          state(conn, SSH_SFTP_CLOSE);
+          sshc->actualcode = CURLE_OUT_OF_MEMORY;
+          break;
+        }
+        conn->data->state.most_recent_ftp_entrypath = sshc->homedir;
+      }
+      else {
+        /* Return the error type */
+        err = sftp_libssh2_last_error(sshc->sftp_session);
+        if(err)
+          result = sftp_libssh2_error_to_CURLE(err);
+        else
+          /* in this case, the error wasn't in the SFTP level but for example
+             a time-out or similar */
+          result = CURLE_SSH;
+        sshc->actualcode = result;
+        DEBUGF(infof(data, "error = %d makes libcurl = %d\n",
+                     err, (int)result));
+        state(conn, SSH_STOP);
+        break;
+      }
+    }
+    /* This is the last step in the SFTP connect phase. Do note that while
+       we get the homedir here, we get the "workingpath" in the DO action
+       since the homedir will remain the same between request but the
+       working path will not. */
+    DEBUGF(infof(data, "SSH CONNECT phase done\n"));
+    state(conn, SSH_STOP);
+    break;
+
+    case SSH_SFTP_QUOTE_INIT:
+
+      result = Curl_getworkingpath(conn, sshc->homedir, &sftp_scp->path);
+      if(result) {
+        sshc->actualcode = result;
+        state(conn, SSH_STOP);
+        break;
+      }
+
+      if(data->set.quote) {
+        infof(data, "Sending quote commands\n");
+        sshc->quote_item = data->set.quote;
+        state(conn, SSH_SFTP_QUOTE);
+      }
+      else {
+        state(conn, SSH_SFTP_GETINFO);
+      }
+      break;
+
+    case SSH_SFTP_POSTQUOTE_INIT:
+      if(data->set.postquote) {
+        infof(data, "Sending quote commands\n");
+        sshc->quote_item = data->set.postquote;
+        state(conn, SSH_SFTP_QUOTE);
+      }
+      else {
+        state(conn, SSH_STOP);
+      }
+      break;
+
+    case SSH_SFTP_QUOTE:
+      /* Send any quote commands */
+    {
+      const char *cp;
+
+      /*
+       * Support some of the "FTP" commands
+       *
+       * 'sshc->quote_item' is already verified to be non-NULL before it
+       * switched to this state.
+       */
+      char *cmd = sshc->quote_item->data;
+      sshc->acceptfail = FALSE;
+
+      /* if a command starts with an asterisk, which a legal SFTP command never
+         can, the command will be allowed to fail without it causing any
+         aborts or cancels etc. It will cause libcurl to act as if the command
+         is successful, whatever the server reponds. */
+
+      if(cmd[0] == '*') {
+        cmd++;
+        sshc->acceptfail = TRUE;
+      }
+
+      if(strcasecompare("pwd", cmd)) {
+        /* output debug output if that is requested */
+        char *tmp = aprintf("257 \"%s\" is current directory.\n",
+                            sftp_scp->path);
+        if(!tmp) {
+          result = CURLE_OUT_OF_MEMORY;
+          state(conn, SSH_SFTP_CLOSE);
+          sshc->nextstate = SSH_NO_STATE;
+          break;
+        }
+        if(data->set.verbose) {
+          Curl_debug(data, CURLINFO_HEADER_OUT, (char *)"PWD\n", 4);
+          Curl_debug(data, CURLINFO_HEADER_IN, tmp, strlen(tmp));
+        }
+        /* this sends an FTP-like "header" to the header callback so that the
+           current directory can be read very similar to how it is read when
+           using ordinary FTP. */
+        result = Curl_client_write(conn, CLIENTWRITE_HEADER, tmp, strlen(tmp));
+        free(tmp);
+        if(result) {
+          state(conn, SSH_SFTP_CLOSE);
+          sshc->nextstate = SSH_NO_STATE;
+          sshc->actualcode = result;
+        }
+        else
+          state(conn, SSH_SFTP_NEXT_QUOTE);
+        break;
+      }
+      {
+        /*
+         * the arguments following the command must be separated from the
+         * command with a space so we can check for it unconditionally
+         */
+        cp = strchr(cmd, ' ');
+        if(cp == NULL) {
+          failf(data, "Syntax error in SFTP command. Supply parameter(s)!");
+          state(conn, SSH_SFTP_CLOSE);
+          sshc->nextstate = SSH_NO_STATE;
+          sshc->actualcode = CURLE_QUOTE_ERROR;
+          break;
+        }
+
+        /*
+         * also, every command takes at least one argument so we get that
+         * first argument right now
+         */
+        result = Curl_get_pathname(&cp, &sshc->quote_path1, sshc->homedir);
+        if(result) {
+          if(result == CURLE_OUT_OF_MEMORY)
+            failf(data, "Out of memory");
+          else
+            failf(data, "Syntax error: Bad first parameter");
+          state(conn, SSH_SFTP_CLOSE);
+          sshc->nextstate = SSH_NO_STATE;
+          sshc->actualcode = result;
+          break;
+        }
+
+        /*
+         * SFTP is a binary protocol, so we don't send text commands
+         * to the server. Instead, we scan for commands used by
+         * OpenSSH's sftp program and call the appropriate libssh2
+         * functions.
+         */
+        if(strncasecompare(cmd, "chgrp ", 6) ||
+           strncasecompare(cmd, "chmod ", 6) ||
+           strncasecompare(cmd, "chown ", 6) ) {
+          /* attribute change */
+
+          /* sshc->quote_path1 contains the mode to set */
+          /* get the destination */
+          result = Curl_get_pathname(&cp, &sshc->quote_path2, sshc->homedir);
+          if(result) {
+            if(result == CURLE_OUT_OF_MEMORY)
+              failf(data, "Out of memory");
+            else
+              failf(data, "Syntax error in chgrp/chmod/chown: "
+                    "Bad second parameter");
+            Curl_safefree(sshc->quote_path1);
+            state(conn, SSH_SFTP_CLOSE);
+            sshc->nextstate = SSH_NO_STATE;
+            sshc->actualcode = result;
+            break;
+          }
+          memset(&sshc->quote_attrs, 0, sizeof(LIBSSH2_SFTP_ATTRIBUTES));
+          state(conn, SSH_SFTP_QUOTE_STAT);
+          break;
+        }
+        if(strncasecompare(cmd, "ln ", 3) ||
+           strncasecompare(cmd, "symlink ", 8)) {
+          /* symbolic linking */
+          /* sshc->quote_path1 is the source */
+          /* get the destination */
+          result = Curl_get_pathname(&cp, &sshc->quote_path2, sshc->homedir);
+          if(result) {
+            if(result == CURLE_OUT_OF_MEMORY)
+              failf(data, "Out of memory");
+            else
+              failf(data,
+                    "Syntax error in ln/symlink: Bad second parameter");
+            Curl_safefree(sshc->quote_path1);
+            state(conn, SSH_SFTP_CLOSE);
+            sshc->nextstate = SSH_NO_STATE;
+            sshc->actualcode = result;
+            break;
+          }
+          state(conn, SSH_SFTP_QUOTE_SYMLINK);
+          break;
+        }
+        else if(strncasecompare(cmd, "mkdir ", 6)) {
+          /* create dir */
+          state(conn, SSH_SFTP_QUOTE_MKDIR);
+          break;
+        }
+        else if(strncasecompare(cmd, "rename ", 7)) {
+          /* rename file */
+          /* first param is the source path */
+          /* second param is the dest. path */
+          result = Curl_get_pathname(&cp, &sshc->quote_path2, sshc->homedir);
+          if(result) {
+            if(result == CURLE_OUT_OF_MEMORY)
+              failf(data, "Out of memory");
+            else
+              failf(data, "Syntax error in rename: Bad second parameter");
+            Curl_safefree(sshc->quote_path1);
+            state(conn, SSH_SFTP_CLOSE);
+            sshc->nextstate = SSH_NO_STATE;
+            sshc->actualcode = result;
+            break;
+          }
+          state(conn, SSH_SFTP_QUOTE_RENAME);
+          break;
+        }
+        else if(strncasecompare(cmd, "rmdir ", 6)) {
+          /* delete dir */
+          state(conn, SSH_SFTP_QUOTE_RMDIR);
+          break;
+        }
+        else if(strncasecompare(cmd, "rm ", 3)) {
+          state(conn, SSH_SFTP_QUOTE_UNLINK);
+          break;
+        }
+#ifdef HAS_STATVFS_SUPPORT
+        else if(strncasecompare(cmd, "statvfs ", 8)) {
+          state(conn, SSH_SFTP_QUOTE_STATVFS);
+          break;
+        }
+#endif
+
+        failf(data, "Unknown SFTP command");
+        Curl_safefree(sshc->quote_path1);
+        Curl_safefree(sshc->quote_path2);
+        state(conn, SSH_SFTP_CLOSE);
+        sshc->nextstate = SSH_NO_STATE;
+        sshc->actualcode = CURLE_QUOTE_ERROR;
+        break;
+      }
+    }
+    break;
+
+    case SSH_SFTP_NEXT_QUOTE:
+      Curl_safefree(sshc->quote_path1);
+      Curl_safefree(sshc->quote_path2);
+
+      sshc->quote_item = sshc->quote_item->next;
+
+      if(sshc->quote_item) {
+        state(conn, SSH_SFTP_QUOTE);
+      }
+      else {
+        if(sshc->nextstate != SSH_NO_STATE) {
+          state(conn, sshc->nextstate);
+          sshc->nextstate = SSH_NO_STATE;
+        }
+        else {
+          state(conn, SSH_SFTP_GETINFO);
+        }
+      }
+      break;
+
+    case SSH_SFTP_QUOTE_STAT:
+    {
+      char *cmd = sshc->quote_item->data;
+      sshc->acceptfail = FALSE;
+
+      /* if a command starts with an asterisk, which a legal SFTP command never
+         can, the command will be allowed to fail without it causing any
+         aborts or cancels etc. It will cause libcurl to act as if the command
+         is successful, whatever the server reponds. */
+
+      if(cmd[0] == '*') {
+        cmd++;
+        sshc->acceptfail = TRUE;
+      }
+
+      if(!strncasecompare(cmd, "chmod", 5)) {
+        /* Since chown and chgrp only set owner OR group but libssh2 wants to
+         * set them both at once, we need to obtain the current ownership
+         * first.  This takes an extra protocol round trip.
+         */
+        rc = libssh2_sftp_stat_ex(sshc->sftp_session, sshc->quote_path2,
+                                  curlx_uztoui(strlen(sshc->quote_path2)),
+                                  LIBSSH2_SFTP_STAT,
+                                  &sshc->quote_attrs);
+        if(rc == LIBSSH2_ERROR_EAGAIN) {
+          break;
+        }
+        if(rc != 0 && !sshc->acceptfail) { /* get those attributes */
+          err = sftp_libssh2_last_error(sshc->sftp_session);
+          Curl_safefree(sshc->quote_path1);
+          Curl_safefree(sshc->quote_path2);
+          failf(data, "Attempt to get SFTP stats failed: %s",
+                sftp_libssh2_strerror(err));
+          state(conn, SSH_SFTP_CLOSE);
+          sshc->nextstate = SSH_NO_STATE;
+          sshc->actualcode = CURLE_QUOTE_ERROR;
+          break;
+        }
+      }
+
+      /* Now set the new attributes... */
+      if(strncasecompare(cmd, "chgrp", 5)) {
+        sshc->quote_attrs.gid = strtoul(sshc->quote_path1, NULL, 10);
+        sshc->quote_attrs.flags = LIBSSH2_SFTP_ATTR_UIDGID;
+        if(sshc->quote_attrs.gid == 0 && !ISDIGIT(sshc->quote_path1[0]) &&
+           !sshc->acceptfail) {
+          Curl_safefree(sshc->quote_path1);
+          Curl_safefree(sshc->quote_path2);
+          failf(data, "Syntax error: chgrp gid not a number");
+          state(conn, SSH_SFTP_CLOSE);
+          sshc->nextstate = SSH_NO_STATE;
+          sshc->actualcode = CURLE_QUOTE_ERROR;
+          break;
+        }
+      }
+      else if(strncasecompare(cmd, "chmod", 5)) {
+        sshc->quote_attrs.permissions = strtoul(sshc->quote_path1, NULL, 8);
+        sshc->quote_attrs.flags = LIBSSH2_SFTP_ATTR_PERMISSIONS;
+        /* permissions are octal */
+        if(sshc->quote_attrs.permissions == 0 &&
+           !ISDIGIT(sshc->quote_path1[0])) {
+          Curl_safefree(sshc->quote_path1);
+          Curl_safefree(sshc->quote_path2);
+          failf(data, "Syntax error: chmod permissions not a number");
+          state(conn, SSH_SFTP_CLOSE);
+          sshc->nextstate = SSH_NO_STATE;
+          sshc->actualcode = CURLE_QUOTE_ERROR;
+          break;
+        }
+      }
+      else if(strncasecompare(cmd, "chown", 5)) {
+        sshc->quote_attrs.uid = strtoul(sshc->quote_path1, NULL, 10);
+        sshc->quote_attrs.flags = LIBSSH2_SFTP_ATTR_UIDGID;
+        if(sshc->quote_attrs.uid == 0 && !ISDIGIT(sshc->quote_path1[0]) &&
+           !sshc->acceptfail) {
+          Curl_safefree(sshc->quote_path1);
+          Curl_safefree(sshc->quote_path2);
+          failf(data, "Syntax error: chown uid not a number");
+          state(conn, SSH_SFTP_CLOSE);
+          sshc->nextstate = SSH_NO_STATE;
+          sshc->actualcode = CURLE_QUOTE_ERROR;
+          break;
+        }
+      }
+
+      /* Now send the completed structure... */
+      state(conn, SSH_SFTP_QUOTE_SETSTAT);
+      break;
+    }
+
+    case SSH_SFTP_QUOTE_SETSTAT:
+      rc = libssh2_sftp_stat_ex(sshc->sftp_session, sshc->quote_path2,
+                                curlx_uztoui(strlen(sshc->quote_path2)),
+                                LIBSSH2_SFTP_SETSTAT,
+                                &sshc->quote_attrs);
+      if(rc == LIBSSH2_ERROR_EAGAIN) {
+        break;
+      }
+      if(rc != 0 && !sshc->acceptfail) {
+        err = sftp_libssh2_last_error(sshc->sftp_session);
+        Curl_safefree(sshc->quote_path1);
+        Curl_safefree(sshc->quote_path2);
+        failf(data, "Attempt to set SFTP stats failed: %s",
+              sftp_libssh2_strerror(err));
+        state(conn, SSH_SFTP_CLOSE);
+        sshc->nextstate = SSH_NO_STATE;
+        sshc->actualcode = CURLE_QUOTE_ERROR;
+        break;
+      }
+      state(conn, SSH_SFTP_NEXT_QUOTE);
+      break;
+
+    case SSH_SFTP_QUOTE_SYMLINK:
+      rc = libssh2_sftp_symlink_ex(sshc->sftp_session, sshc->quote_path1,
+                                   curlx_uztoui(strlen(sshc->quote_path1)),
+                                   sshc->quote_path2,
+                                   curlx_uztoui(strlen(sshc->quote_path2)),
+                                   LIBSSH2_SFTP_SYMLINK);
+      if(rc == LIBSSH2_ERROR_EAGAIN) {
+        break;
+      }
+      if(rc != 0 && !sshc->acceptfail) {
+        err = sftp_libssh2_last_error(sshc->sftp_session);
+        Curl_safefree(sshc->quote_path1);
+        Curl_safefree(sshc->quote_path2);
+        failf(data, "symlink command failed: %s",
+              sftp_libssh2_strerror(err));
+        state(conn, SSH_SFTP_CLOSE);
+        sshc->nextstate = SSH_NO_STATE;
+        sshc->actualcode = CURLE_QUOTE_ERROR;
+        break;
+      }
+      state(conn, SSH_SFTP_NEXT_QUOTE);
+      break;
+
+    case SSH_SFTP_QUOTE_MKDIR:
+      rc = libssh2_sftp_mkdir_ex(sshc->sftp_session, sshc->quote_path1,
+                                 curlx_uztoui(strlen(sshc->quote_path1)),
+                                 data->set.new_directory_perms);
+      if(rc == LIBSSH2_ERROR_EAGAIN) {
+        break;
+      }
+      if(rc != 0 && !sshc->acceptfail) {
+        err = sftp_libssh2_last_error(sshc->sftp_session);
+        Curl_safefree(sshc->quote_path1);
+        failf(data, "mkdir command failed: %s", sftp_libssh2_strerror(err));
+        state(conn, SSH_SFTP_CLOSE);
+        sshc->nextstate = SSH_NO_STATE;
+        sshc->actualcode = CURLE_QUOTE_ERROR;
+        break;
+      }
+      state(conn, SSH_SFTP_NEXT_QUOTE);
+      break;
+
+    case SSH_SFTP_QUOTE_RENAME:
+      rc = libssh2_sftp_rename_ex(sshc->sftp_session, sshc->quote_path1,
+                                  curlx_uztoui(strlen(sshc->quote_path1)),
+                                  sshc->quote_path2,
+                                  curlx_uztoui(strlen(sshc->quote_path2)),
+                                  LIBSSH2_SFTP_RENAME_OVERWRITE |
+                                  LIBSSH2_SFTP_RENAME_ATOMIC |
+                                  LIBSSH2_SFTP_RENAME_NATIVE);
+
+      if(rc == LIBSSH2_ERROR_EAGAIN) {
+        break;
+      }
+      if(rc != 0 && !sshc->acceptfail) {
+        err = sftp_libssh2_last_error(sshc->sftp_session);
+        Curl_safefree(sshc->quote_path1);
+        Curl_safefree(sshc->quote_path2);
+        failf(data, "rename command failed: %s", sftp_libssh2_strerror(err));
+        state(conn, SSH_SFTP_CLOSE);
+        sshc->nextstate = SSH_NO_STATE;
+        sshc->actualcode = CURLE_QUOTE_ERROR;
+        break;
+      }
+      state(conn, SSH_SFTP_NEXT_QUOTE);
+      break;
+
+    case SSH_SFTP_QUOTE_RMDIR:
+      rc = libssh2_sftp_rmdir_ex(sshc->sftp_session, sshc->quote_path1,
+                                 curlx_uztoui(strlen(sshc->quote_path1)));
+      if(rc == LIBSSH2_ERROR_EAGAIN) {
+        break;
+      }
+      if(rc != 0 && !sshc->acceptfail) {
+        err = sftp_libssh2_last_error(sshc->sftp_session);
+        Curl_safefree(sshc->quote_path1);
+        failf(data, "rmdir command failed: %s", sftp_libssh2_strerror(err));
+        state(conn, SSH_SFTP_CLOSE);
+        sshc->nextstate = SSH_NO_STATE;
+        sshc->actualcode = CURLE_QUOTE_ERROR;
+        break;
+      }
+      state(conn, SSH_SFTP_NEXT_QUOTE);
+      break;
+
+    case SSH_SFTP_QUOTE_UNLINK:
+      rc = libssh2_sftp_unlink_ex(sshc->sftp_session, sshc->quote_path1,
+                                  curlx_uztoui(strlen(sshc->quote_path1)));
+      if(rc == LIBSSH2_ERROR_EAGAIN) {
+        break;
+      }
+      if(rc != 0 && !sshc->acceptfail) {
+        err = sftp_libssh2_last_error(sshc->sftp_session);
+        Curl_safefree(sshc->quote_path1);
+        failf(data, "rm command failed: %s", sftp_libssh2_strerror(err));
+        state(conn, SSH_SFTP_CLOSE);
+        sshc->nextstate = SSH_NO_STATE;
+        sshc->actualcode = CURLE_QUOTE_ERROR;
+        break;
+      }
+      state(conn, SSH_SFTP_NEXT_QUOTE);
+      break;
+
+#ifdef HAS_STATVFS_SUPPORT
+    case SSH_SFTP_QUOTE_STATVFS:
+    {
+      LIBSSH2_SFTP_STATVFS statvfs;
+      rc = libssh2_sftp_statvfs(sshc->sftp_session, sshc->quote_path1,
+                                curlx_uztoui(strlen(sshc->quote_path1)),
+                                &statvfs);
+
+      if(rc == LIBSSH2_ERROR_EAGAIN) {
+        break;
+      }
+      if(rc != 0 && !sshc->acceptfail) {
+        err = sftp_libssh2_last_error(sshc->sftp_session);
+        Curl_safefree(sshc->quote_path1);
+        failf(data, "statvfs command failed: %s", sftp_libssh2_strerror(err));
+        state(conn, SSH_SFTP_CLOSE);
+        sshc->nextstate = SSH_NO_STATE;
+        sshc->actualcode = CURLE_QUOTE_ERROR;
+        break;
+      }
+      else if(rc == 0) {
+        char *tmp = aprintf("statvfs:\n"
+                            "f_bsize: %llu\n" "f_frsize: %llu\n"
+                            "f_blocks: %llu\n" "f_bfree: %llu\n"
+                            "f_bavail: %llu\n" "f_files: %llu\n"
+                            "f_ffree: %llu\n" "f_favail: %llu\n"
+                            "f_fsid: %llu\n" "f_flag: %llu\n"
+                            "f_namemax: %llu\n",
+                            statvfs.f_bsize, statvfs.f_frsize,
+                            statvfs.f_blocks, statvfs.f_bfree,
+                            statvfs.f_bavail, statvfs.f_files,
+                            statvfs.f_ffree, statvfs.f_favail,
+                            statvfs.f_fsid, statvfs.f_flag,
+                            statvfs.f_namemax);
+        if(!tmp) {
+          result = CURLE_OUT_OF_MEMORY;
+          state(conn, SSH_SFTP_CLOSE);
+          sshc->nextstate = SSH_NO_STATE;
+          break;
+        }
+
+        result = Curl_client_write(conn, CLIENTWRITE_HEADER, tmp, strlen(tmp));
+        free(tmp);
+        if(result) {
+          state(conn, SSH_SFTP_CLOSE);
+          sshc->nextstate = SSH_NO_STATE;
+          sshc->actualcode = result;
+        }
+      }
+      state(conn, SSH_SFTP_NEXT_QUOTE);
+      break;
+    }
+#endif
+    case SSH_SFTP_GETINFO:
+    {
+      if(data->set.get_filetime) {
+        state(conn, SSH_SFTP_FILETIME);
+      }
+      else {
+        state(conn, SSH_SFTP_TRANS_INIT);
+      }
+      break;
+    }
+
+    case SSH_SFTP_FILETIME:
+    {
+      LIBSSH2_SFTP_ATTRIBUTES attrs;
+
+      rc = libssh2_sftp_stat_ex(sshc->sftp_session, sftp_scp->path,
+                                curlx_uztoui(strlen(sftp_scp->path)),
+                                LIBSSH2_SFTP_STAT, &attrs);
+      if(rc == LIBSSH2_ERROR_EAGAIN) {
+        break;
+      }
+      if(rc == 0) {
+        data->info.filetime = attrs.mtime;
+      }
+
+      state(conn, SSH_SFTP_TRANS_INIT);
+      break;
+    }
+
+    case SSH_SFTP_TRANS_INIT:
+      if(data->set.upload)
+        state(conn, SSH_SFTP_UPLOAD_INIT);
+      else {
+        if(sftp_scp->path[strlen(sftp_scp->path)-1] == '/')
+          state(conn, SSH_SFTP_READDIR_INIT);
+        else
+          state(conn, SSH_SFTP_DOWNLOAD_INIT);
+      }
+      break;
+
+    case SSH_SFTP_UPLOAD_INIT:
+    {
+      unsigned long flags;
+      /*
+       * NOTE!!!  libssh2 requires that the destination path is a full path
+       *          that includes the destination file and name OR ends in a "/"
+       *          If this is not done the destination file will be named the
+       *          same name as the last directory in the path.
+       */
+
+      if(data->state.resume_from != 0) {
+        LIBSSH2_SFTP_ATTRIBUTES attrs;
+        if(data->state.resume_from < 0) {
+          rc = libssh2_sftp_stat_ex(sshc->sftp_session, sftp_scp->path,
+                                    curlx_uztoui(strlen(sftp_scp->path)),
+                                    LIBSSH2_SFTP_STAT, &attrs);
+          if(rc == LIBSSH2_ERROR_EAGAIN) {
+            break;
+          }
+          if(rc) {
+            data->state.resume_from = 0;
+          }
+          else {
+            curl_off_t size = attrs.filesize;
+            if(size < 0) {
+              failf(data, "Bad file size (%" CURL_FORMAT_CURL_OFF_T ")", size);
+              return CURLE_BAD_DOWNLOAD_RESUME;
+            }
+            data->state.resume_from = attrs.filesize;
+          }
+        }
+      }
+
+      if(data->set.ftp_append)
+        /* Try to open for append, but create if nonexisting */
+        flags = LIBSSH2_FXF_WRITE|LIBSSH2_FXF_CREAT|LIBSSH2_FXF_APPEND;
+      else if(data->state.resume_from > 0)
+        /* If we have restart position then open for append */
+        flags = LIBSSH2_FXF_WRITE|LIBSSH2_FXF_APPEND;
+      else
+        /* Clear file before writing (normal behaviour) */
+        flags = LIBSSH2_FXF_WRITE|LIBSSH2_FXF_CREAT|LIBSSH2_FXF_TRUNC;
+
+      sshc->sftp_handle =
+        libssh2_sftp_open_ex(sshc->sftp_session, sftp_scp->path,
+                             curlx_uztoui(strlen(sftp_scp->path)),
+                             flags, data->set.new_file_perms,
+                             LIBSSH2_SFTP_OPENFILE);
+
+      if(!sshc->sftp_handle) {
+        rc = libssh2_session_last_errno(sshc->ssh_session);
+
+        if(LIBSSH2_ERROR_EAGAIN == rc)
+          break;
+
+        if(LIBSSH2_ERROR_SFTP_PROTOCOL == rc)
+          /* only when there was an SFTP protocol error can we extract
+             the sftp error! */
+          err = sftp_libssh2_last_error(sshc->sftp_session);
+        else
+          err = -1; /* not an sftp error at all */
+
+        if(sshc->secondCreateDirs) {
+          state(conn, SSH_SFTP_CLOSE);
+          sshc->actualcode = err>= LIBSSH2_FX_OK?
+            sftp_libssh2_error_to_CURLE(err):CURLE_SSH;
+          failf(data, "Creating the dir/file failed: %s",
+                sftp_libssh2_strerror(err));
+          break;
+        }
+        if(((err == LIBSSH2_FX_NO_SUCH_FILE) ||
+            (err == LIBSSH2_FX_FAILURE) ||
+            (err == LIBSSH2_FX_NO_SUCH_PATH)) &&
+           (data->set.ftp_create_missing_dirs &&
+            (strlen(sftp_scp->path) > 1))) {
+          /* try to create the path remotely */
+          rc = 0; /* clear rc and continue */
+          sshc->secondCreateDirs = 1;
+          state(conn, SSH_SFTP_CREATE_DIRS_INIT);
+          break;
+        }
+        state(conn, SSH_SFTP_CLOSE);
+        sshc->actualcode = err>= LIBSSH2_FX_OK?
+          sftp_libssh2_error_to_CURLE(err):CURLE_SSH;
+        if(!sshc->actualcode) {
+          /* Sometimes, for some reason libssh2_sftp_last_error() returns
+             zero even though libssh2_sftp_open() failed previously! We need
+             to work around that! */
+          sshc->actualcode = CURLE_SSH;
+          err = -1;
+        }
+        failf(data, "Upload failed: %s (%d/%d)",
+              err>= LIBSSH2_FX_OK?sftp_libssh2_strerror(err):"ssh error",
+              err, rc);
+        break;
+      }
+
+      /* If we have a restart point then we need to seek to the correct
+         position. */
+      if(data->state.resume_from > 0) {
+        /* Let's read off the proper amount of bytes from the input. */
+        if(conn->seek_func) {
+          Curl_set_in_callback(data, true);
+          seekerr = conn->seek_func(conn->seek_client, data->state.resume_from,
+                                    SEEK_SET);
+          Curl_set_in_callback(data, false);
+        }
+
+        if(seekerr != CURL_SEEKFUNC_OK) {
+          curl_off_t passed = 0;
+
+          if(seekerr != CURL_SEEKFUNC_CANTSEEK) {
+            failf(data, "Could not seek stream");
+            return CURLE_FTP_COULDNT_USE_REST;
+          }
+          /* seekerr == CURL_SEEKFUNC_CANTSEEK (can't seek to offset) */
+          do {
+            size_t readthisamountnow =
+              (data->state.resume_from - passed > data->set.buffer_size) ?
+              (size_t)data->set.buffer_size :
+              curlx_sotouz(data->state.resume_from - passed);
+
+            size_t actuallyread;
+            Curl_set_in_callback(data, true);
+            actuallyread = data->state.fread_func(data->state.buffer, 1,
+                                                  readthisamountnow,
+                                                  data->state.in);
+            Curl_set_in_callback(data, false);
+
+            passed += actuallyread;
+            if((actuallyread == 0) || (actuallyread > readthisamountnow)) {
+              /* this checks for greater-than only to make sure that the
+                 CURL_READFUNC_ABORT return code still aborts */
+              failf(data, "Failed to read data");
+              return CURLE_FTP_COULDNT_USE_REST;
+            }
+          } while(passed < data->state.resume_from);
+        }
+
+        /* now, decrease the size of the read */
+        if(data->state.infilesize > 0) {
+          data->state.infilesize -= data->state.resume_from;
+          data->req.size = data->state.infilesize;
+          Curl_pgrsSetUploadSize(data, data->state.infilesize);
+        }
+
+        SFTP_SEEK(sshc->sftp_handle, data->state.resume_from);
+      }
+      if(data->state.infilesize > 0) {
+        data->req.size = data->state.infilesize;
+        Curl_pgrsSetUploadSize(data, data->state.infilesize);
+      }
+      /* upload data */
+      Curl_setup_transfer(data, -1, -1, FALSE, FIRSTSOCKET);
+
+      /* not set by Curl_setup_transfer to preserve keepon bits */
+      conn->sockfd = conn->writesockfd;
+
+      if(result) {
+        state(conn, SSH_SFTP_CLOSE);
+        sshc->actualcode = result;
+      }
+      else {
+        /* store this original bitmask setup to use later on if we can't
+           figure out a "real" bitmask */
+        sshc->orig_waitfor = data->req.keepon;
+
+        /* we want to use the _sending_ function even when the socket turns
+           out readable as the underlying libssh2 sftp send function will deal
+           with both accordingly */
+        conn->cselect_bits = CURL_CSELECT_OUT;
+
+        /* since we don't really wait for anything at this point, we want the
+           state machine to move on as soon as possible so we set a very short
+           timeout here */
+        Curl_expire(data, 0, EXPIRE_RUN_NOW);
+
+        state(conn, SSH_STOP);
+      }
+      break;
+    }
+
+    case SSH_SFTP_CREATE_DIRS_INIT:
+      if(strlen(sftp_scp->path) > 1) {
+        sshc->slash_pos = sftp_scp->path + 1; /* ignore the leading '/' */
+        state(conn, SSH_SFTP_CREATE_DIRS);
+      }
+      else {
+        state(conn, SSH_SFTP_UPLOAD_INIT);
+      }
+      break;
+
+    case SSH_SFTP_CREATE_DIRS:
+      sshc->slash_pos = strchr(sshc->slash_pos, '/');
+      if(sshc->slash_pos) {
+        *sshc->slash_pos = 0;
+
+        infof(data, "Creating directory '%s'\n", sftp_scp->path);
+        state(conn, SSH_SFTP_CREATE_DIRS_MKDIR);
+        break;
+      }
+      state(conn, SSH_SFTP_UPLOAD_INIT);
+      break;
+
+    case SSH_SFTP_CREATE_DIRS_MKDIR:
+      /* 'mode' - parameter is preliminary - default to 0644 */
+      rc = libssh2_sftp_mkdir_ex(sshc->sftp_session, sftp_scp->path,
+                                 curlx_uztoui(strlen(sftp_scp->path)),
+                                 data->set.new_directory_perms);
+      if(rc == LIBSSH2_ERROR_EAGAIN) {
+        break;
+      }
+      *sshc->slash_pos = '/';
+      ++sshc->slash_pos;
+      if(rc < 0) {
+        /*
+         * Abort if failure wasn't that the dir already exists or the
+         * permission was denied (creation might succeed further down the
+         * path) - retry on unspecific FAILURE also
+         */
+        err = sftp_libssh2_last_error(sshc->sftp_session);
+        if((err != LIBSSH2_FX_FILE_ALREADY_EXISTS) &&
+           (err != LIBSSH2_FX_FAILURE) &&
+           (err != LIBSSH2_FX_PERMISSION_DENIED)) {
+          result = sftp_libssh2_error_to_CURLE(err);
+          state(conn, SSH_SFTP_CLOSE);
+          sshc->actualcode = result?result:CURLE_SSH;
+          break;
+        }
+        rc = 0; /* clear rc and continue */
+      }
+      state(conn, SSH_SFTP_CREATE_DIRS);
+      break;
+
+    case SSH_SFTP_READDIR_INIT:
+      Curl_pgrsSetDownloadSize(data, -1);
+      if(data->set.opt_no_body) {
+        state(conn, SSH_STOP);
+        break;
+      }
+
+      /*
+       * This is a directory that we are trying to get, so produce a directory
+       * listing
+       */
+      sshc->sftp_handle = libssh2_sftp_open_ex(sshc->sftp_session,
+                                               sftp_scp->path,
+                                               curlx_uztoui(
+                                                 strlen(sftp_scp->path)),
+                                               0, 0, LIBSSH2_SFTP_OPENDIR);
+      if(!sshc->sftp_handle) {
+        if(libssh2_session_last_errno(sshc->ssh_session) ==
+           LIBSSH2_ERROR_EAGAIN) {
+          rc = LIBSSH2_ERROR_EAGAIN;
+          break;
+        }
+        err = sftp_libssh2_last_error(sshc->sftp_session);
+        failf(data, "Could not open directory for reading: %s",
+              sftp_libssh2_strerror(err));
+        state(conn, SSH_SFTP_CLOSE);
+        result = sftp_libssh2_error_to_CURLE(err);
+        sshc->actualcode = result?result:CURLE_SSH;
+        break;
+      }
+      sshc->readdir_filename = malloc(PATH_MAX + 1);
+      if(!sshc->readdir_filename) {
+        state(conn, SSH_SFTP_CLOSE);
+        sshc->actualcode = CURLE_OUT_OF_MEMORY;
+        break;
+      }
+      sshc->readdir_longentry = malloc(PATH_MAX + 1);
+      if(!sshc->readdir_longentry) {
+        Curl_safefree(sshc->readdir_filename);
+        state(conn, SSH_SFTP_CLOSE);
+        sshc->actualcode = CURLE_OUT_OF_MEMORY;
+        break;
+      }
+      state(conn, SSH_SFTP_READDIR);
+      break;
+
+    case SSH_SFTP_READDIR:
+      rc = libssh2_sftp_readdir_ex(sshc->sftp_handle,
+                                   sshc->readdir_filename,
+                                   PATH_MAX,
+                                   sshc->readdir_longentry,
+                                   PATH_MAX,
+                                   &sshc->readdir_attrs);
+      if(rc == LIBSSH2_ERROR_EAGAIN) {
+        break;
+      }
+      if(rc > 0) {
+        sshc->readdir_len = (size_t) rc;
+        sshc->readdir_filename[sshc->readdir_len] = '\0';
+
+        if(data->set.ftp_list_only) {
+          char *tmpLine;
+
+          tmpLine = aprintf("%s\n", sshc->readdir_filename);
+          if(tmpLine == NULL) {
+            state(conn, SSH_SFTP_CLOSE);
+            sshc->actualcode = CURLE_OUT_OF_MEMORY;
+            break;
+          }
+          result = Curl_client_write(conn, CLIENTWRITE_BODY,
+                                     tmpLine, sshc->readdir_len + 1);
+          free(tmpLine);
+
+          if(result) {
+            state(conn, SSH_STOP);
+            break;
+          }
+          /* since this counts what we send to the client, we include the
+             newline in this counter */
+          data->req.bytecount += sshc->readdir_len + 1;
+
+          /* output debug output if that is requested */
+          if(data->set.verbose) {
+            Curl_debug(data, CURLINFO_DATA_OUT, sshc->readdir_filename,
+                       sshc->readdir_len);
+          }
+        }
+        else {
+          sshc->readdir_currLen = strlen(sshc->readdir_longentry);
+          sshc->readdir_totalLen = 80 + sshc->readdir_currLen;
+          sshc->readdir_line = calloc(sshc->readdir_totalLen, 1);
+          if(!sshc->readdir_line) {
+            Curl_safefree(sshc->readdir_filename);
+            Curl_safefree(sshc->readdir_longentry);
+            state(conn, SSH_SFTP_CLOSE);
+            sshc->actualcode = CURLE_OUT_OF_MEMORY;
+            break;
+          }
+
+          memcpy(sshc->readdir_line, sshc->readdir_longentry,
+                 sshc->readdir_currLen);
+          if((sshc->readdir_attrs.flags & LIBSSH2_SFTP_ATTR_PERMISSIONS) &&
+             ((sshc->readdir_attrs.permissions & LIBSSH2_SFTP_S_IFMT) ==
+              LIBSSH2_SFTP_S_IFLNK)) {
+            sshc->readdir_linkPath = malloc(PATH_MAX + 1);
+            if(sshc->readdir_linkPath == NULL) {
+              Curl_safefree(sshc->readdir_filename);
+              Curl_safefree(sshc->readdir_longentry);
+              state(conn, SSH_SFTP_CLOSE);
+              sshc->actualcode = CURLE_OUT_OF_MEMORY;
+              break;
+            }
+
+            msnprintf(sshc->readdir_linkPath, PATH_MAX, "%s%s", sftp_scp->path,
+                      sshc->readdir_filename);
+            state(conn, SSH_SFTP_READDIR_LINK);
+            break;
+          }
+          state(conn, SSH_SFTP_READDIR_BOTTOM);
+          break;
+        }
+      }
+      else if(rc == 0) {
+        Curl_safefree(sshc->readdir_filename);
+        Curl_safefree(sshc->readdir_longentry);
+        state(conn, SSH_SFTP_READDIR_DONE);
+        break;
+      }
+      else if(rc < 0) {
+        err = sftp_libssh2_last_error(sshc->sftp_session);
+        result = sftp_libssh2_error_to_CURLE(err);
+        sshc->actualcode = result?result:CURLE_SSH;
+        failf(data, "Could not open remote file for reading: %s :: %d",
+              sftp_libssh2_strerror(err),
+              libssh2_session_last_errno(sshc->ssh_session));
+        Curl_safefree(sshc->readdir_filename);
+        Curl_safefree(sshc->readdir_longentry);
+        state(conn, SSH_SFTP_CLOSE);
+        break;
+      }
+      break;
+
+    case SSH_SFTP_READDIR_LINK:
+      rc =
+        libssh2_sftp_symlink_ex(sshc->sftp_session,
+                                sshc->readdir_linkPath,
+                                curlx_uztoui(strlen(sshc->readdir_linkPath)),
+                                sshc->readdir_filename,
+                                PATH_MAX, LIBSSH2_SFTP_READLINK);
+      if(rc == LIBSSH2_ERROR_EAGAIN) {
+        break;
+      }
+      sshc->readdir_len = (size_t) rc;
+      Curl_safefree(sshc->readdir_linkPath);
+
+      /* get room for the filename and extra output */
+      sshc->readdir_totalLen += 4 + sshc->readdir_len;
+      new_readdir_line = Curl_saferealloc(sshc->readdir_line,
+                                          sshc->readdir_totalLen);
+      if(!new_readdir_line) {
+        sshc->readdir_line = NULL;
+        Curl_safefree(sshc->readdir_filename);
+        Curl_safefree(sshc->readdir_longentry);
+        state(conn, SSH_SFTP_CLOSE);
+        sshc->actualcode = CURLE_OUT_OF_MEMORY;
+        break;
+      }
+      sshc->readdir_line = new_readdir_line;
+
+      sshc->readdir_currLen += msnprintf(sshc->readdir_line +
+                                         sshc->readdir_currLen,
+                                         sshc->readdir_totalLen -
+                                         sshc->readdir_currLen,
+                                         " -> %s",
+                                         sshc->readdir_filename);
+
+      state(conn, SSH_SFTP_READDIR_BOTTOM);
+      break;
+
+    case SSH_SFTP_READDIR_BOTTOM:
+      sshc->readdir_currLen += msnprintf(sshc->readdir_line +
+                                         sshc->readdir_currLen,
+                                         sshc->readdir_totalLen -
+                                         sshc->readdir_currLen, "\n");
+      result = Curl_client_write(conn, CLIENTWRITE_BODY,
+                                 sshc->readdir_line,
+                                 sshc->readdir_currLen);
+
+      if(!result) {
+
+        /* output debug output if that is requested */
+        if(data->set.verbose) {
+          Curl_debug(data, CURLINFO_DATA_OUT, sshc->readdir_line,
+                     sshc->readdir_currLen);
+        }
+        data->req.bytecount += sshc->readdir_currLen;
+      }
+      Curl_safefree(sshc->readdir_line);
+      if(result) {
+        state(conn, SSH_STOP);
+      }
+      else
+        state(conn, SSH_SFTP_READDIR);
+      break;
+
+    case SSH_SFTP_READDIR_DONE:
+      if(libssh2_sftp_closedir(sshc->sftp_handle) ==
+         LIBSSH2_ERROR_EAGAIN) {
+        rc = LIBSSH2_ERROR_EAGAIN;
+        break;
+      }
+      sshc->sftp_handle = NULL;
+      Curl_safefree(sshc->readdir_filename);
+      Curl_safefree(sshc->readdir_longentry);
+
+      /* no data to transfer */
+      Curl_setup_transfer(data, -1, -1, FALSE, -1);
+      state(conn, SSH_STOP);
+      break;
+
+    case SSH_SFTP_DOWNLOAD_INIT:
+      /*
+       * Work on getting the specified file
+       */
+      sshc->sftp_handle =
+        libssh2_sftp_open_ex(sshc->sftp_session, sftp_scp->path,
+                             curlx_uztoui(strlen(sftp_scp->path)),
+                             LIBSSH2_FXF_READ, data->set.new_file_perms,
+                             LIBSSH2_SFTP_OPENFILE);
+      if(!sshc->sftp_handle) {
+        if(libssh2_session_last_errno(sshc->ssh_session) ==
+           LIBSSH2_ERROR_EAGAIN) {
+          rc = LIBSSH2_ERROR_EAGAIN;
+          break;
+        }
+        err = sftp_libssh2_last_error(sshc->sftp_session);
+        failf(data, "Could not open remote file for reading: %s",
+              sftp_libssh2_strerror(err));
+        state(conn, SSH_SFTP_CLOSE);
+        result = sftp_libssh2_error_to_CURLE(err);
+        sshc->actualcode = result?result:CURLE_SSH;
+        break;
+      }
+      state(conn, SSH_SFTP_DOWNLOAD_STAT);
+      break;
+
+    case SSH_SFTP_DOWNLOAD_STAT:
+    {
+      LIBSSH2_SFTP_ATTRIBUTES attrs;
+
+      rc = libssh2_sftp_stat_ex(sshc->sftp_session, sftp_scp->path,
+                                curlx_uztoui(strlen(sftp_scp->path)),
+                                LIBSSH2_SFTP_STAT, &attrs);
+      if(rc == LIBSSH2_ERROR_EAGAIN) {
+        break;
+      }
+      if(rc ||
+         !(attrs.flags & LIBSSH2_SFTP_ATTR_SIZE) ||
+         (attrs.filesize == 0)) {
+        /*
+         * libssh2_sftp_open() didn't return an error, so maybe the server
+         * just doesn't support stat()
+         * OR the server doesn't return a file size with a stat()
+         * OR file size is 0
+         */
+        data->req.size = -1;
+        data->req.maxdownload = -1;
+        Curl_pgrsSetDownloadSize(data, -1);
+      }
+      else {
+        curl_off_t size = attrs.filesize;
+
+        if(size < 0) {
+          failf(data, "Bad file size (%" CURL_FORMAT_CURL_OFF_T ")", size);
+          return CURLE_BAD_DOWNLOAD_RESUME;
+        }
+        if(conn->data->state.use_range) {
+          curl_off_t from, to;
+          char *ptr;
+          char *ptr2;
+          CURLofft to_t;
+          CURLofft from_t;
+
+          from_t = curlx_strtoofft(conn->data->state.range, &ptr, 0, &from);
+          if(from_t == CURL_OFFT_FLOW)
+            return CURLE_RANGE_ERROR;
+          while(*ptr && (ISSPACE(*ptr) || (*ptr == '-')))
+            ptr++;
+          to_t = curlx_strtoofft(ptr, &ptr2, 0, &to);
+          if(to_t == CURL_OFFT_FLOW)
+            return CURLE_RANGE_ERROR;
+          if((to_t == CURL_OFFT_INVAL) /* no "to" value given */
+             || (to >= size)) {
+            to = size - 1;
+          }
+          if(from_t) {
+            /* from is relative to end of file */
+            from = size - to;
+            to = size - 1;
+          }
+          if(from > size) {
+            failf(data, "Offset (%"
+                  CURL_FORMAT_CURL_OFF_T ") was beyond file size (%"
+                  CURL_FORMAT_CURL_OFF_T ")", from, attrs.filesize);
+            return CURLE_BAD_DOWNLOAD_RESUME;
+          }
+          if(from > to) {
+            from = to;
+            size = 0;
+          }
+          else {
+            size = to - from + 1;
+          }
+
+          SFTP_SEEK(conn->proto.sshc.sftp_handle, from);
+        }
+        data->req.size = size;
+        data->req.maxdownload = size;
+        Curl_pgrsSetDownloadSize(data, size);
+      }
+
+      /* We can resume if we can seek to the resume position */
+      if(data->state.resume_from) {
+        if(data->state.resume_from < 0) {
+          /* We're supposed to download the last abs(from) bytes */
+          if((curl_off_t)attrs.filesize < -data->state.resume_from) {
+            failf(data, "Offset (%"
+                  CURL_FORMAT_CURL_OFF_T ") was beyond file size (%"
+                  CURL_FORMAT_CURL_OFF_T ")",
+                  data->state.resume_from, attrs.filesize);
+            return CURLE_BAD_DOWNLOAD_RESUME;
+          }
+          /* download from where? */
+          data->state.resume_from += attrs.filesize;
+        }
+        else {
+          if((curl_off_t)attrs.filesize < data->state.resume_from) {
+            failf(data, "Offset (%" CURL_FORMAT_CURL_OFF_T
+                  ") was beyond file size (%" CURL_FORMAT_CURL_OFF_T ")",
+                  data->state.resume_from, attrs.filesize);
+            return CURLE_BAD_DOWNLOAD_RESUME;
+          }
+        }
+        /* Does a completed file need to be seeked and started or closed ? */
+        /* Now store the number of bytes we are expected to download */
+        data->req.size = attrs.filesize - data->state.resume_from;
+        data->req.maxdownload = attrs.filesize - data->state.resume_from;
+        Curl_pgrsSetDownloadSize(data,
+                                 attrs.filesize - data->state.resume_from);
+        SFTP_SEEK(sshc->sftp_handle, data->state.resume_from);
+      }
+    }
+
+    /* Setup the actual download */
+    if(data->req.size == 0) {
+      /* no data to transfer */
+      Curl_setup_transfer(data, -1, -1, FALSE, -1);
+      infof(data, "File already completely downloaded\n");
+      state(conn, SSH_STOP);
+      break;
+    }
+    Curl_setup_transfer(data, FIRSTSOCKET, data->req.size, FALSE, -1);
+
+    /* not set by Curl_setup_transfer to preserve keepon bits */
+    conn->writesockfd = conn->sockfd;
+
+    /* we want to use the _receiving_ function even when the socket turns
+       out writableable as the underlying libssh2 recv function will deal
+       with both accordingly */
+    conn->cselect_bits = CURL_CSELECT_IN;
+
+    if(result) {
+      /* this should never occur; the close state should be entered
+         at the time the error occurs */
+      state(conn, SSH_SFTP_CLOSE);
+      sshc->actualcode = result;
+    }
+    else {
+      state(conn, SSH_STOP);
+    }
+    break;
+
+    case SSH_SFTP_CLOSE:
+      if(sshc->sftp_handle) {
+        rc = libssh2_sftp_close(sshc->sftp_handle);
+        if(rc == LIBSSH2_ERROR_EAGAIN) {
+          break;
+        }
+        if(rc < 0) {
+          char *err_msg = NULL;
+          (void)libssh2_session_last_error(sshc->ssh_session,
+                                           &err_msg, NULL, 0);
+          infof(data, "Failed to close libssh2 file: %d %s\n", rc, err_msg);
+        }
+        sshc->sftp_handle = NULL;
+      }
+
+      Curl_safefree(sftp_scp->path);
+
+      DEBUGF(infof(data, "SFTP DONE done\n"));
+
+      /* Check if nextstate is set and move .nextstate could be POSTQUOTE_INIT
+         After nextstate is executed, the control should come back to
+         SSH_SFTP_CLOSE to pass the correct result back  */
+      if(sshc->nextstate != SSH_NO_STATE &&
+         sshc->nextstate != SSH_SFTP_CLOSE) {
+        state(conn, sshc->nextstate);
+        sshc->nextstate = SSH_SFTP_CLOSE;
+      }
+      else {
+        state(conn, SSH_STOP);
+        result = sshc->actualcode;
+      }
+      break;
+
+    case SSH_SFTP_SHUTDOWN:
+      /* during times we get here due to a broken transfer and then the
+         sftp_handle might not have been taken down so make sure that is done
+         before we proceed */
+
+      if(sshc->sftp_handle) {
+        rc = libssh2_sftp_close(sshc->sftp_handle);
+        if(rc == LIBSSH2_ERROR_EAGAIN) {
+          break;
+        }
+        if(rc < 0) {
+          char *err_msg = NULL;
+          (void)libssh2_session_last_error(sshc->ssh_session, &err_msg,
+                                           NULL, 0);
+          infof(data, "Failed to close libssh2 file: %d %s\n", rc, err_msg);
+        }
+        sshc->sftp_handle = NULL;
+      }
+      if(sshc->sftp_session) {
+        rc = libssh2_sftp_shutdown(sshc->sftp_session);
+        if(rc == LIBSSH2_ERROR_EAGAIN) {
+          break;
+        }
+        if(rc < 0) {
+          infof(data, "Failed to stop libssh2 sftp subsystem\n");
+        }
+        sshc->sftp_session = NULL;
+      }
+
+      Curl_safefree(sshc->homedir);
+      conn->data->state.most_recent_ftp_entrypath = NULL;
+
+      state(conn, SSH_SESSION_DISCONNECT);
+      break;
+
+    case SSH_SCP_TRANS_INIT:
+      result = Curl_getworkingpath(conn, sshc->homedir, &sftp_scp->path);
+      if(result) {
+        sshc->actualcode = result;
+        state(conn, SSH_STOP);
+        break;
+      }
+
+      if(data->set.upload) {
+        if(data->state.infilesize < 0) {
+          failf(data, "SCP requires a known file size for upload");
+          sshc->actualcode = CURLE_UPLOAD_FAILED;
+          state(conn, SSH_SCP_CHANNEL_FREE);
+          break;
+        }
+        state(conn, SSH_SCP_UPLOAD_INIT);
+      }
+      else {
+        state(conn, SSH_SCP_DOWNLOAD_INIT);
+      }
+      break;
+
+    case SSH_SCP_UPLOAD_INIT:
+      /*
+       * libssh2 requires that the destination path is a full path that
+       * includes the destination file and name OR ends in a "/" .  If this is
+       * not done the destination file will be named the same name as the last
+       * directory in the path.
+       */
+      sshc->ssh_channel =
+        SCP_SEND(sshc->ssh_session, sftp_scp->path, data->set.new_file_perms,
+                 data->state.infilesize);
+      if(!sshc->ssh_channel) {
+        int ssh_err;
+        char *err_msg = NULL;
+
+        if(libssh2_session_last_errno(sshc->ssh_session) ==
+           LIBSSH2_ERROR_EAGAIN) {
+          rc = LIBSSH2_ERROR_EAGAIN;
+          break;
+        }
+
+        ssh_err = (int)(libssh2_session_last_error(sshc->ssh_session,
+                                                   &err_msg, NULL, 0));
+        failf(conn->data, "%s", err_msg);
+        state(conn, SSH_SCP_CHANNEL_FREE);
+        sshc->actualcode = libssh2_session_error_to_CURLE(ssh_err);
+        /* Map generic errors to upload failed */
+        if(sshc->actualcode == CURLE_SSH ||
+           sshc->actualcode == CURLE_REMOTE_FILE_NOT_FOUND)
+          sshc->actualcode = CURLE_UPLOAD_FAILED;
+        break;
+      }
+
+      /* upload data */
+      Curl_setup_transfer(data, -1, data->req.size, FALSE, FIRSTSOCKET);
+
+      /* not set by Curl_setup_transfer to preserve keepon bits */
+      conn->sockfd = conn->writesockfd;
+
+      if(result) {
+        state(conn, SSH_SCP_CHANNEL_FREE);
+        sshc->actualcode = result;
+      }
+      else {
+        /* store this original bitmask setup to use later on if we can't
+           figure out a "real" bitmask */
+        sshc->orig_waitfor = data->req.keepon;
+
+        /* we want to use the _sending_ function even when the socket turns
+           out readable as the underlying libssh2 scp send function will deal
+           with both accordingly */
+        conn->cselect_bits = CURL_CSELECT_OUT;
+
+        state(conn, SSH_STOP);
+      }
+      break;
+
+    case SSH_SCP_DOWNLOAD_INIT:
+    {
+      curl_off_t bytecount;
+
+      /*
+       * We must check the remote file; if it is a directory no values will
+       * be set in sb
+       */
+
+      /*
+       * If support for >2GB files exists, use it.
+       */
+
+      /* get a fresh new channel from the ssh layer */
+#if LIBSSH2_VERSION_NUM < 0x010700
+      struct stat sb;
+      memset(&sb, 0, sizeof(struct stat));
+      sshc->ssh_channel = libssh2_scp_recv(sshc->ssh_session,
+                                           sftp_scp->path, &sb);
+#else
+      libssh2_struct_stat sb;
+      memset(&sb, 0, sizeof(libssh2_struct_stat));
+      sshc->ssh_channel = libssh2_scp_recv2(sshc->ssh_session,
+                                            sftp_scp->path, &sb);
+#endif
+
+      if(!sshc->ssh_channel) {
+        int ssh_err;
+        char *err_msg = NULL;
+
+        if(libssh2_session_last_errno(sshc->ssh_session) ==
+           LIBSSH2_ERROR_EAGAIN) {
+          rc = LIBSSH2_ERROR_EAGAIN;
+          break;
+        }
+
+
+        ssh_err = (int)(libssh2_session_last_error(sshc->ssh_session,
+                                                   &err_msg, NULL, 0));
+        failf(conn->data, "%s", err_msg);
+        state(conn, SSH_SCP_CHANNEL_FREE);
+        sshc->actualcode = libssh2_session_error_to_CURLE(ssh_err);
+        break;
+      }
+
+      /* download data */
+      bytecount = (curl_off_t)sb.st_size;
+      data->req.maxdownload =  (curl_off_t)sb.st_size;
+      Curl_setup_transfer(data, FIRSTSOCKET, bytecount, FALSE, -1);
+
+      /* not set by Curl_setup_transfer to preserve keepon bits */
+      conn->writesockfd = conn->sockfd;
+
+      /* we want to use the _receiving_ function even when the socket turns
+         out writableable as the underlying libssh2 recv function will deal
+         with both accordingly */
+      conn->cselect_bits = CURL_CSELECT_IN;
+
+      if(result) {
+        state(conn, SSH_SCP_CHANNEL_FREE);
+        sshc->actualcode = result;
+      }
+      else
+        state(conn, SSH_STOP);
+    }
+    break;
+
+    case SSH_SCP_DONE:
+      if(data->set.upload)
+        state(conn, SSH_SCP_SEND_EOF);
+      else
+        state(conn, SSH_SCP_CHANNEL_FREE);
+      break;
+
+    case SSH_SCP_SEND_EOF:
+      if(sshc->ssh_channel) {
+        rc = libssh2_channel_send_eof(sshc->ssh_channel);
+        if(rc == LIBSSH2_ERROR_EAGAIN) {
+          break;
+        }
+        if(rc) {
+          char *err_msg = NULL;
+          (void)libssh2_session_last_error(sshc->ssh_session,
+                                           &err_msg, NULL, 0);
+          infof(data, "Failed to send libssh2 channel EOF: %d %s\n",
+                rc, err_msg);
+        }
+      }
+      state(conn, SSH_SCP_WAIT_EOF);
+      break;
+
+    case SSH_SCP_WAIT_EOF:
+      if(sshc->ssh_channel) {
+        rc = libssh2_channel_wait_eof(sshc->ssh_channel);
+        if(rc == LIBSSH2_ERROR_EAGAIN) {
+          break;
+        }
+        if(rc) {
+          char *err_msg = NULL;
+          (void)libssh2_session_last_error(sshc->ssh_session,
+                                           &err_msg, NULL, 0);
+          infof(data, "Failed to get channel EOF: %d %s\n", rc, err_msg);
+        }
+      }
+      state(conn, SSH_SCP_WAIT_CLOSE);
+      break;
+
+    case SSH_SCP_WAIT_CLOSE:
+      if(sshc->ssh_channel) {
+        rc = libssh2_channel_wait_closed(sshc->ssh_channel);
+        if(rc == LIBSSH2_ERROR_EAGAIN) {
+          break;
+        }
+        if(rc) {
+          char *err_msg = NULL;
+          (void)libssh2_session_last_error(sshc->ssh_session,
+                                           &err_msg, NULL, 0);
+          infof(data, "Channel failed to close: %d %s\n", rc, err_msg);
+        }
+      }
+      state(conn, SSH_SCP_CHANNEL_FREE);
+      break;
+
+    case SSH_SCP_CHANNEL_FREE:
+      if(sshc->ssh_channel) {
+        rc = libssh2_channel_free(sshc->ssh_channel);
+        if(rc == LIBSSH2_ERROR_EAGAIN) {
+          break;
+        }
+        if(rc < 0) {
+          char *err_msg = NULL;
+          (void)libssh2_session_last_error(sshc->ssh_session,
+                                           &err_msg, NULL, 0);
+          infof(data, "Failed to free libssh2 scp subsystem: %d %s\n",
+                rc, err_msg);
+        }
+        sshc->ssh_channel = NULL;
+      }
+      DEBUGF(infof(data, "SCP DONE phase complete\n"));
+#if 0 /* PREV */
+      state(conn, SSH_SESSION_DISCONNECT);
+#endif
+      state(conn, SSH_STOP);
+      result = sshc->actualcode;
+      break;
+
+    case SSH_SESSION_DISCONNECT:
+      /* during weird times when we've been prematurely aborted, the channel
+         is still alive when we reach this state and we MUST kill the channel
+         properly first */
+      if(sshc->ssh_channel) {
+        rc = libssh2_channel_free(sshc->ssh_channel);
+        if(rc == LIBSSH2_ERROR_EAGAIN) {
+          break;
+        }
+        if(rc < 0) {
+          char *err_msg = NULL;
+          (void)libssh2_session_last_error(sshc->ssh_session,
+                                           &err_msg, NULL, 0);
+          infof(data, "Failed to free libssh2 scp subsystem: %d %s\n",
+                rc, err_msg);
+        }
+        sshc->ssh_channel = NULL;
+      }
+
+      if(sshc->ssh_session) {
+        rc = libssh2_session_disconnect(sshc->ssh_session, "Shutdown");
+        if(rc == LIBSSH2_ERROR_EAGAIN) {
+          break;
+        }
+        if(rc < 0) {
+          char *err_msg = NULL;
+          (void)libssh2_session_last_error(sshc->ssh_session,
+                                           &err_msg, NULL, 0);
+          infof(data, "Failed to disconnect libssh2 session: %d %s\n",
+                rc, err_msg);
+        }
+      }
+
+      Curl_safefree(sshc->homedir);
+      conn->data->state.most_recent_ftp_entrypath = NULL;
+
+      state(conn, SSH_SESSION_FREE);
+      break;
+
+    case SSH_SESSION_FREE:
+#ifdef HAVE_LIBSSH2_KNOWNHOST_API
+      if(sshc->kh) {
+        libssh2_knownhost_free(sshc->kh);
+        sshc->kh = NULL;
+      }
+#endif
+
+#ifdef HAVE_LIBSSH2_AGENT_API
+      if(sshc->ssh_agent) {
+        rc = libssh2_agent_disconnect(sshc->ssh_agent);
+        if(rc == LIBSSH2_ERROR_EAGAIN) {
+          break;
+        }
+        if(rc < 0) {
+          char *err_msg = NULL;
+          (void)libssh2_session_last_error(sshc->ssh_session,
+                                           &err_msg, NULL, 0);
+          infof(data, "Failed to disconnect from libssh2 agent: %d %s\n",
+                rc, err_msg);
+        }
+        libssh2_agent_free(sshc->ssh_agent);
+        sshc->ssh_agent = NULL;
+
+        /* NB: there is no need to free identities, they are part of internal
+           agent stuff */
+        sshc->sshagent_identity = NULL;
+        sshc->sshagent_prev_identity = NULL;
+      }
+#endif
+
+      if(sshc->ssh_session) {
+        rc = libssh2_session_free(sshc->ssh_session);
+        if(rc == LIBSSH2_ERROR_EAGAIN) {
+          break;
+        }
+        if(rc < 0) {
+          char *err_msg = NULL;
+          (void)libssh2_session_last_error(sshc->ssh_session,
+                                           &err_msg, NULL, 0);
+          infof(data, "Failed to free libssh2 session: %d %s\n", rc, err_msg);
+        }
+        sshc->ssh_session = NULL;
+      }
+
+      /* worst-case scenario cleanup */
+
+      DEBUGASSERT(sshc->ssh_session == NULL);
+      DEBUGASSERT(sshc->ssh_channel == NULL);
+      DEBUGASSERT(sshc->sftp_session == NULL);
+      DEBUGASSERT(sshc->sftp_handle == NULL);
+#ifdef HAVE_LIBSSH2_KNOWNHOST_API
+      DEBUGASSERT(sshc->kh == NULL);
+#endif
+#ifdef HAVE_LIBSSH2_AGENT_API
+      DEBUGASSERT(sshc->ssh_agent == NULL);
+#endif
+
+      Curl_safefree(sshc->rsa_pub);
+      Curl_safefree(sshc->rsa);
+
+      Curl_safefree(sshc->quote_path1);
+      Curl_safefree(sshc->quote_path2);
+
+      Curl_safefree(sshc->homedir);
+
+      Curl_safefree(sshc->readdir_filename);
+      Curl_safefree(sshc->readdir_longentry);
+      Curl_safefree(sshc->readdir_line);
+      Curl_safefree(sshc->readdir_linkPath);
+
+      /* the code we are about to return */
+      result = sshc->actualcode;
+
+      memset(sshc, 0, sizeof(struct ssh_conn));
+
+      connclose(conn, "SSH session free");
+      sshc->state = SSH_SESSION_FREE; /* current */
+      sshc->nextstate = SSH_NO_STATE;
+      state(conn, SSH_STOP);
+      break;
+
+    case SSH_QUIT:
+      /* fallthrough, just stop! */
+    default:
+      /* internal error */
+      sshc->nextstate = SSH_NO_STATE;
+      state(conn, SSH_STOP);
+      break;
+    }
+
+  } while(!rc && (sshc->state != SSH_STOP));
+
+  if(rc == LIBSSH2_ERROR_EAGAIN) {
+    /* we would block, we need to wait for the socket to be ready (in the
+       right direction too)! */
+    *block = TRUE;
+  }
+
+  return result;
+}
+
+/* called by the multi interface to figure out what socket(s) to wait for and
+   for what actions in the DO_DONE, PERFORM and WAITPERFORM states */
+static int ssh_perform_getsock(const struct connectdata *conn,
+                               curl_socket_t *sock)
+{
+#ifdef HAVE_LIBSSH2_SESSION_BLOCK_DIRECTION
+  int bitmap = GETSOCK_BLANK;
+
+  sock[0] = conn->sock[FIRSTSOCKET];
+
+  if(conn->waitfor & KEEP_RECV)
+    bitmap |= GETSOCK_READSOCK(FIRSTSOCKET);
+
+  if(conn->waitfor & KEEP_SEND)
+    bitmap |= GETSOCK_WRITESOCK(FIRSTSOCKET);
+
+  return bitmap;
+#else
+  /* if we don't know the direction we can use the generic *_getsock()
+     function even for the protocol_connect and doing states */
+  return Curl_single_getsock(conn, sock);
+#endif
+}
+
+/* Generic function called by the multi interface to figure out what socket(s)
+   to wait for and for what actions during the DOING and PROTOCONNECT states*/
+static int ssh_getsock(struct connectdata *conn,
+                       curl_socket_t *sock)
+{
+#ifndef HAVE_LIBSSH2_SESSION_BLOCK_DIRECTION
+  (void)conn;
+  (void)sock;
+  /* if we don't know any direction we can just play along as we used to and
+     not provide any sensible info */
+  return GETSOCK_BLANK;
+#else
+  /* if we know the direction we can use the generic *_getsock() function even
+     for the protocol_connect and doing states */
+  return ssh_perform_getsock(conn, sock);
+#endif
+}
+
+#ifdef HAVE_LIBSSH2_SESSION_BLOCK_DIRECTION
+/*
+ * When one of the libssh2 functions has returned LIBSSH2_ERROR_EAGAIN this
+ * function is used to figure out in what direction and stores this info so
+ * that the multi interface can take advantage of it. Make sure to call this
+ * function in all cases so that when it _doesn't_ return EAGAIN we can
+ * restore the default wait bits.
+ */
+static void ssh_block2waitfor(struct connectdata *conn, bool block)
+{
+  struct ssh_conn *sshc = &conn->proto.sshc;
+  int dir = 0;
+  if(block) {
+    dir = libssh2_session_block_directions(sshc->ssh_session);
+    if(dir) {
+      /* translate the libssh2 define bits into our own bit defines */
+      conn->waitfor = ((dir&LIBSSH2_SESSION_BLOCK_INBOUND)?KEEP_RECV:0) |
+        ((dir&LIBSSH2_SESSION_BLOCK_OUTBOUND)?KEEP_SEND:0);
+    }
+  }
+  if(!dir)
+    /* It didn't block or libssh2 didn't reveal in which direction, put back
+       the original set */
+    conn->waitfor = sshc->orig_waitfor;
+}
+#else
+  /* no libssh2 directional support so we simply don't know */
+#define ssh_block2waitfor(x,y) Curl_nop_stmt
+#endif
+
+/* called repeatedly until done from multi.c */
+static CURLcode ssh_multi_statemach(struct connectdata *conn, bool *done)
+{
+  struct ssh_conn *sshc = &conn->proto.sshc;
+  CURLcode result = CURLE_OK;
+  bool block; /* we store the status and use that to provide a ssh_getsock()
+                 implementation */
+  do {
+    result = ssh_statemach_act(conn, &block);
+    *done = (sshc->state == SSH_STOP) ? TRUE : FALSE;
+    /* if there's no error, it isn't done and it didn't EWOULDBLOCK, then
+       try again */
+  } while(!result && !*done && !block);
+  ssh_block2waitfor(conn, block);
+
+  return result;
+}
+
+static CURLcode ssh_block_statemach(struct connectdata *conn,
+                                    bool disconnect)
+{
+  struct ssh_conn *sshc = &conn->proto.sshc;
+  CURLcode result = CURLE_OK;
+  struct Curl_easy *data = conn->data;
+
+  while((sshc->state != SSH_STOP) && !result) {
+    bool block;
+    timediff_t left = 1000;
+    struct curltime now = Curl_now();
+
+    result = ssh_statemach_act(conn, &block);
+    if(result)
+      break;
+
+    if(!disconnect) {
+      if(Curl_pgrsUpdate(conn))
+        return CURLE_ABORTED_BY_CALLBACK;
+
+      result = Curl_speedcheck(data, now);
+      if(result)
+        break;
+
+      left = Curl_timeleft(data, NULL, FALSE);
+      if(left < 0) {
+        failf(data, "Operation timed out");
+        return CURLE_OPERATION_TIMEDOUT;
+      }
+    }
+
+#ifdef HAVE_LIBSSH2_SESSION_BLOCK_DIRECTION
+    if(!result && block) {
+      int dir = libssh2_session_block_directions(sshc->ssh_session);
+      curl_socket_t sock = conn->sock[FIRSTSOCKET];
+      curl_socket_t fd_read = CURL_SOCKET_BAD;
+      curl_socket_t fd_write = CURL_SOCKET_BAD;
+      if(LIBSSH2_SESSION_BLOCK_INBOUND & dir)
+        fd_read = sock;
+      if(LIBSSH2_SESSION_BLOCK_OUTBOUND & dir)
+        fd_write = sock;
+      /* wait for the socket to become ready */
+      (void)Curl_socket_check(fd_read, CURL_SOCKET_BAD, fd_write,
+                              left>1000?1000:left); /* ignore result */
+    }
+#endif
+
+  }
+
+  return result;
+}
+
+/*
+ * SSH setup and connection
+ */
+static CURLcode ssh_setup_connection(struct connectdata *conn)
+{
+  struct SSHPROTO *ssh;
+
+  conn->data->req.protop = ssh = calloc(1, sizeof(struct SSHPROTO));
+  if(!ssh)
+    return CURLE_OUT_OF_MEMORY;
+
+  return CURLE_OK;
+}
+
+static Curl_recv scp_recv, sftp_recv;
+static Curl_send scp_send, sftp_send;
+
+/*
+ * Curl_ssh_connect() gets called from Curl_protocol_connect() to allow us to
+ * do protocol-specific actions at connect-time.
+ */
+static CURLcode ssh_connect(struct connectdata *conn, bool *done)
+{
+#ifdef CURL_LIBSSH2_DEBUG
+  curl_socket_t sock;
+#endif
+  struct ssh_conn *ssh;
+  CURLcode result;
+  struct Curl_easy *data = conn->data;
+
+  /* initialize per-handle data if not already */
+  if(!data->req.protop)
+    ssh_setup_connection(conn);
+
+  /* We default to persistent connections. We set this already in this connect
+     function to make the re-use checks properly be able to check this bit. */
+  connkeep(conn, "SSH default");
+
+  if(conn->handler->protocol & CURLPROTO_SCP) {
+    conn->recv[FIRSTSOCKET] = scp_recv;
+    conn->send[FIRSTSOCKET] = scp_send;
+  }
+  else {
+    conn->recv[FIRSTSOCKET] = sftp_recv;
+    conn->send[FIRSTSOCKET] = sftp_send;
+  }
+  ssh = &conn->proto.sshc;
+
+#ifdef CURL_LIBSSH2_DEBUG
+  if(conn->user) {
+    infof(data, "User: %s\n", conn->user);
+  }
+  if(conn->passwd) {
+    infof(data, "Password: %s\n", conn->passwd);
+  }
+  sock = conn->sock[FIRSTSOCKET];
+#endif /* CURL_LIBSSH2_DEBUG */
+
+  ssh->ssh_session = libssh2_session_init_ex(my_libssh2_malloc,
+                                             my_libssh2_free,
+                                             my_libssh2_realloc, conn);
+  if(ssh->ssh_session == NULL) {
+    failf(data, "Failure initialising ssh session");
+    return CURLE_FAILED_INIT;
+  }
+
+  if(data->set.ssh_compression) {
+#if LIBSSH2_VERSION_NUM >= 0x010208
+    if(libssh2_session_flag(ssh->ssh_session, LIBSSH2_FLAG_COMPRESS, 1) < 0)
+#endif
+      infof(data, "Failed to enable compression for ssh session\n");
+  }
+
+#ifdef HAVE_LIBSSH2_KNOWNHOST_API
+  if(data->set.str[STRING_SSH_KNOWNHOSTS]) {
+    int rc;
+    ssh->kh = libssh2_knownhost_init(ssh->ssh_session);
+    if(!ssh->kh) {
+      libssh2_session_free(ssh->ssh_session);
+      return CURLE_FAILED_INIT;
+    }
+
+    /* read all known hosts from there */
+    rc = libssh2_knownhost_readfile(ssh->kh,
+                                    data->set.str[STRING_SSH_KNOWNHOSTS],
+                                    LIBSSH2_KNOWNHOST_FILE_OPENSSH);
+    if(rc < 0)
+      infof(data, "Failed to read known hosts from %s\n",
+            data->set.str[STRING_SSH_KNOWNHOSTS]);
+  }
+#endif /* HAVE_LIBSSH2_KNOWNHOST_API */
+
+#ifdef CURL_LIBSSH2_DEBUG
+  libssh2_trace(ssh->ssh_session, ~0);
+  infof(data, "SSH socket: %d\n", (int)sock);
+#endif /* CURL_LIBSSH2_DEBUG */
+
+  state(conn, SSH_INIT);
+
+  result = ssh_multi_statemach(conn, done);
+
+  return result;
+}
+
+/*
+ ***********************************************************************
+ *
+ * scp_perform()
+ *
+ * This is the actual DO function for SCP. Get a file according to
+ * the options previously setup.
+ */
+
+static
+CURLcode scp_perform(struct connectdata *conn,
+                      bool *connected,
+                      bool *dophase_done)
+{
+  CURLcode result = CURLE_OK;
+
+  DEBUGF(infof(conn->data, "DO phase starts\n"));
+
+  *dophase_done = FALSE; /* not done yet */
+
+  /* start the first command in the DO phase */
+  state(conn, SSH_SCP_TRANS_INIT);
+
+  /* run the state-machine */
+  result = ssh_multi_statemach(conn, dophase_done);
+
+  *connected = conn->bits.tcpconnect[FIRSTSOCKET];
+
+  if(*dophase_done) {
+    DEBUGF(infof(conn->data, "DO phase is complete\n"));
+  }
+
+  return result;
+}
+
+/* called from multi.c while DOing */
+static CURLcode scp_doing(struct connectdata *conn,
+                               bool *dophase_done)
+{
+  CURLcode result;
+  result = ssh_multi_statemach(conn, dophase_done);
+
+  if(*dophase_done) {
+    DEBUGF(infof(conn->data, "DO phase is complete\n"));
+  }
+  return result;
+}
+
+/*
+ * The DO function is generic for both protocols. There was previously two
+ * separate ones but this way means less duplicated code.
+ */
+
+static CURLcode ssh_do(struct connectdata *conn, bool *done)
+{
+  CURLcode result;
+  bool connected = 0;
+  struct Curl_easy *data = conn->data;
+  struct ssh_conn *sshc = &conn->proto.sshc;
+
+  *done = FALSE; /* default to false */
+
+  data->req.size = -1; /* make sure this is unknown at this point */
+
+  sshc->actualcode = CURLE_OK; /* reset error code */
+  sshc->secondCreateDirs = 0;   /* reset the create dir attempt state
+                                   variable */
+
+  Curl_pgrsSetUploadCounter(data, 0);
+  Curl_pgrsSetDownloadCounter(data, 0);
+  Curl_pgrsSetUploadSize(data, -1);
+  Curl_pgrsSetDownloadSize(data, -1);
+
+  if(conn->handler->protocol & CURLPROTO_SCP)
+    result = scp_perform(conn, &connected,  done);
+  else
+    result = sftp_perform(conn, &connected,  done);
+
+  return result;
+}
+
+/* BLOCKING, but the function is using the state machine so the only reason
+   this is still blocking is that the multi interface code has no support for
+   disconnecting operations that takes a while */
+static CURLcode scp_disconnect(struct connectdata *conn, bool dead_connection)
+{
+  CURLcode result = CURLE_OK;
+  struct ssh_conn *ssh = &conn->proto.sshc;
+  (void) dead_connection;
+
+  if(ssh->ssh_session) {
+    /* only if there's a session still around to use! */
+
+    state(conn, SSH_SESSION_DISCONNECT);
+
+    result = ssh_block_statemach(conn, TRUE);
+  }
+
+  return result;
+}
+
+/* generic done function for both SCP and SFTP called from their specific
+   done functions */
+static CURLcode ssh_done(struct connectdata *conn, CURLcode status)
+{
+  CURLcode result = CURLE_OK;
+  struct SSHPROTO *sftp_scp = conn->data->req.protop;
+
+  if(!status) {
+    /* run the state-machine */
+    result = ssh_block_statemach(conn, FALSE);
+  }
+  else
+    result = status;
+
+  if(sftp_scp)
+    Curl_safefree(sftp_scp->path);
+  if(Curl_pgrsDone(conn))
+    return CURLE_ABORTED_BY_CALLBACK;
+
+  conn->data->req.keepon = 0; /* clear all bits */
+  return result;
+}
+
+
+static CURLcode scp_done(struct connectdata *conn, CURLcode status,
+                         bool premature)
+{
+  (void)premature; /* not used */
+
+  if(!status)
+    state(conn, SSH_SCP_DONE);
+
+  return ssh_done(conn, status);
+
+}
+
+static ssize_t scp_send(struct connectdata *conn, int sockindex,
+                        const void *mem, size_t len, CURLcode *err)
+{
+  ssize_t nwrite;
+  (void)sockindex; /* we only support SCP on the fixed known primary socket */
+
+  /* libssh2_channel_write() returns int! */
+  nwrite = (ssize_t)
+    libssh2_channel_write(conn->proto.sshc.ssh_channel, mem, len);
+
+  ssh_block2waitfor(conn, (nwrite == LIBSSH2_ERROR_EAGAIN)?TRUE:FALSE);
+
+  if(nwrite == LIBSSH2_ERROR_EAGAIN) {
+    *err = CURLE_AGAIN;
+    nwrite = 0;
+  }
+  else if(nwrite < LIBSSH2_ERROR_NONE) {
+    *err = libssh2_session_error_to_CURLE((int)nwrite);
+    nwrite = -1;
+  }
+
+  return nwrite;
+}
+
+static ssize_t scp_recv(struct connectdata *conn, int sockindex,
+                        char *mem, size_t len, CURLcode *err)
+{
+  ssize_t nread;
+  (void)sockindex; /* we only support SCP on the fixed known primary socket */
+
+  /* libssh2_channel_read() returns int */
+  nread = (ssize_t)
+    libssh2_channel_read(conn->proto.sshc.ssh_channel, mem, len);
+
+  ssh_block2waitfor(conn, (nread == LIBSSH2_ERROR_EAGAIN)?TRUE:FALSE);
+  if(nread == LIBSSH2_ERROR_EAGAIN) {
+    *err = CURLE_AGAIN;
+    nread = -1;
+  }
+
+  return nread;
+}
+
+/*
+ * =============== SFTP ===============
+ */
+
+/*
+ ***********************************************************************
+ *
+ * sftp_perform()
+ *
+ * This is the actual DO function for SFTP. Get a file/directory according to
+ * the options previously setup.
+ */
+
+static
+CURLcode sftp_perform(struct connectdata *conn,
+                      bool *connected,
+                      bool *dophase_done)
+{
+  CURLcode result = CURLE_OK;
+
+  DEBUGF(infof(conn->data, "DO phase starts\n"));
+
+  *dophase_done = FALSE; /* not done yet */
+
+  /* start the first command in the DO phase */
+  state(conn, SSH_SFTP_QUOTE_INIT);
+
+  /* run the state-machine */
+  result = ssh_multi_statemach(conn, dophase_done);
+
+  *connected = conn->bits.tcpconnect[FIRSTSOCKET];
+
+  if(*dophase_done) {
+    DEBUGF(infof(conn->data, "DO phase is complete\n"));
+  }
+
+  return result;
+}
+
+/* called from multi.c while DOing */
+static CURLcode sftp_doing(struct connectdata *conn,
+                           bool *dophase_done)
+{
+  CURLcode result = ssh_multi_statemach(conn, dophase_done);
+
+  if(*dophase_done) {
+    DEBUGF(infof(conn->data, "DO phase is complete\n"));
+  }
+  return result;
+}
+
+/* BLOCKING, but the function is using the state machine so the only reason
+   this is still blocking is that the multi interface code has no support for
+   disconnecting operations that takes a while */
+static CURLcode sftp_disconnect(struct connectdata *conn, bool dead_connection)
+{
+  CURLcode result = CURLE_OK;
+  (void) dead_connection;
+
+  DEBUGF(infof(conn->data, "SSH DISCONNECT starts now\n"));
+
+  if(conn->proto.sshc.ssh_session) {
+    /* only if there's a session still around to use! */
+    state(conn, SSH_SFTP_SHUTDOWN);
+    result = ssh_block_statemach(conn, TRUE);
+  }
+
+  DEBUGF(infof(conn->data, "SSH DISCONNECT is done\n"));
+
+  return result;
+
+}
+
+static CURLcode sftp_done(struct connectdata *conn, CURLcode status,
+                               bool premature)
+{
+  struct ssh_conn *sshc = &conn->proto.sshc;
+
+  if(!status) {
+    /* Post quote commands are executed after the SFTP_CLOSE state to avoid
+       errors that could happen due to open file handles during POSTQUOTE
+       operation */
+    if(!premature && conn->data->set.postquote && !conn->bits.retry)
+      sshc->nextstate = SSH_SFTP_POSTQUOTE_INIT;
+    state(conn, SSH_SFTP_CLOSE);
+  }
+  return ssh_done(conn, status);
+}
+
+/* return number of sent bytes */
+static ssize_t sftp_send(struct connectdata *conn, int sockindex,
+                         const void *mem, size_t len, CURLcode *err)
+{
+  ssize_t nwrite;   /* libssh2_sftp_write() used to return size_t in 0.14
+                       but is changed to ssize_t in 0.15. These days we don't
+                       support libssh2 0.15*/
+  (void)sockindex;
+
+  nwrite = libssh2_sftp_write(conn->proto.sshc.sftp_handle, mem, len);
+
+  ssh_block2waitfor(conn, (nwrite == LIBSSH2_ERROR_EAGAIN)?TRUE:FALSE);
+
+  if(nwrite == LIBSSH2_ERROR_EAGAIN) {
+    *err = CURLE_AGAIN;
+    nwrite = 0;
+  }
+  else if(nwrite < LIBSSH2_ERROR_NONE) {
+    *err = libssh2_session_error_to_CURLE((int)nwrite);
+    nwrite = -1;
+  }
+
+  return nwrite;
+}
+
+/*
+ * Return number of received (decrypted) bytes
+ * or <0 on error
+ */
+static ssize_t sftp_recv(struct connectdata *conn, int sockindex,
+                         char *mem, size_t len, CURLcode *err)
+{
+  ssize_t nread;
+  (void)sockindex;
+
+  nread = libssh2_sftp_read(conn->proto.sshc.sftp_handle, mem, len);
+
+  ssh_block2waitfor(conn, (nread == LIBSSH2_ERROR_EAGAIN)?TRUE:FALSE);
+
+  if(nread == LIBSSH2_ERROR_EAGAIN) {
+    *err = CURLE_AGAIN;
+    nread = -1;
+
+  }
+  else if(nread < 0) {
+    *err = libssh2_session_error_to_CURLE((int)nread);
+  }
+  return nread;
+}
+
+static const char *sftp_libssh2_strerror(int err)
+{
+  switch(err) {
+    case LIBSSH2_FX_NO_SUCH_FILE:
+      return "No such file or directory";
+
+    case LIBSSH2_FX_PERMISSION_DENIED:
+      return "Permission denied";
+
+    case LIBSSH2_FX_FAILURE:
+      return "Operation failed";
+
+    case LIBSSH2_FX_BAD_MESSAGE:
+      return "Bad message from SFTP server";
+
+    case LIBSSH2_FX_NO_CONNECTION:
+      return "Not connected to SFTP server";
+
+    case LIBSSH2_FX_CONNECTION_LOST:
+      return "Connection to SFTP server lost";
+
+    case LIBSSH2_FX_OP_UNSUPPORTED:
+      return "Operation not supported by SFTP server";
+
+    case LIBSSH2_FX_INVALID_HANDLE:
+      return "Invalid handle";
+
+    case LIBSSH2_FX_NO_SUCH_PATH:
+      return "No such file or directory";
+
+    case LIBSSH2_FX_FILE_ALREADY_EXISTS:
+      return "File already exists";
+
+    case LIBSSH2_FX_WRITE_PROTECT:
+      return "File is write protected";
+
+    case LIBSSH2_FX_NO_MEDIA:
+      return "No media";
+
+    case LIBSSH2_FX_NO_SPACE_ON_FILESYSTEM:
+      return "Disk full";
+
+    case LIBSSH2_FX_QUOTA_EXCEEDED:
+      return "User quota exceeded";
+
+    case LIBSSH2_FX_UNKNOWN_PRINCIPLE:
+      return "Unknown principle";
+
+    case LIBSSH2_FX_LOCK_CONFlICT:
+      return "File lock conflict";
+
+    case LIBSSH2_FX_DIR_NOT_EMPTY:
+      return "Directory not empty";
+
+    case LIBSSH2_FX_NOT_A_DIRECTORY:
+      return "Not a directory";
+
+    case LIBSSH2_FX_INVALID_FILENAME:
+      return "Invalid filename";
+
+    case LIBSSH2_FX_LINK_LOOP:
+      return "Link points to itself";
+  }
+  return "Unknown error in libssh2";
+}
+
+#endif /* USE_LIBSSH2 */