From c92d2e14cfb0db662f958effd2ac86f995cf1b5a Mon Sep 17 00:00:00 2001 From: Nikos Mavrogiannopoulos Date: Mon, 23 Oct 2017 13:49:23 +0200 Subject: Added support for libssh SSH SCP back-end libssh is an alternative library to libssh2. https://www.libssh.org/ That patch set also introduces support for ECDSA ed25519 keys, as well as gssapi authentication. Signed-off-by: Nikos Mavrogiannopoulos --- lib/ssh.c | 183 +++----------------------------------------------------------- 1 file changed, 7 insertions(+), 176 deletions(-) (limited to 'lib/ssh.c') diff --git a/lib/ssh.c b/lib/ssh.c index 2496e7cff..54f08edf7 100644 --- a/lib/ssh.c +++ b/lib/ssh.c @@ -87,21 +87,9 @@ /* The last 3 #include files should be in this order */ #include "curl_printf.h" #include "curl_memory.h" +#include "curl_path.h" #include "memdebug.h" -#ifdef WIN32 -# undef PATH_MAX -# define PATH_MAX MAX_PATH -# ifndef R_OK -# define R_OK 4 -# endif -#endif - -#ifndef PATH_MAX -#define PATH_MAX 1024 /* just an extra precaution since there are systems that - have their definition hidden well */ -#endif - #if LIBSSH2_VERSION_NUM >= 0x010206 /* libssh2_sftp_statvfs and friends were added in 1.2.6 */ #define HAS_STATVFS_SUPPORT 1 @@ -120,16 +108,10 @@ static LIBSSH2_ALLOC_FUNC(my_libssh2_malloc); static LIBSSH2_REALLOC_FUNC(my_libssh2_realloc); static LIBSSH2_FREE_FUNC(my_libssh2_free); -static CURLcode get_pathname(const char **cpp, char **path); - 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 ssh_getworkingpath(struct connectdata *conn, - char *homedir, /* when SFTP is used */ - char **path); - static CURLcode scp_done(struct connectdata *conn, CURLcode, bool premature); static CURLcode scp_doing(struct connectdata *conn, @@ -410,70 +392,6 @@ static void state(struct connectdata *conn, sshstate nowstate) sshc->state = nowstate; } -/* figure out the path to work with in this particular request */ -static CURLcode ssh_getworkingpath(struct connectdata *conn, - char *homedir, /* when SFTP is used */ - char **path) /* returns the allocated - real path to work with */ -{ - struct Curl_easy *data = conn->data; - char *real_path = NULL; - char *working_path; - size_t working_path_len; - CURLcode result = - Curl_urldecode(data, data->state.path, 0, &working_path, - &working_path_len, FALSE); - if(result) - return result; - - /* Check for /~/, indicating relative to the user's home directory */ - if(conn->handler->protocol & CURLPROTO_SCP) { - real_path = malloc(working_path_len + 1); - if(real_path == NULL) { - free(working_path); - return CURLE_OUT_OF_MEMORY; - } - if((working_path_len > 3) && (!memcmp(working_path, "/~/", 3))) - /* It is referenced to the home directory, so strip the leading '/~/' */ - memcpy(real_path, working_path + 3, 4 + working_path_len-3); - else - memcpy(real_path, working_path, 1 + working_path_len); - } - else if(conn->handler->protocol & CURLPROTO_SFTP) { - if((working_path_len > 1) && (working_path[1] == '~')) { - size_t homelen = strlen(homedir); - real_path = malloc(homelen + working_path_len + 1); - if(real_path == NULL) { - free(working_path); - return CURLE_OUT_OF_MEMORY; - } - /* It is referenced to the home directory, so strip the - leading '/' */ - memcpy(real_path, homedir, homelen); - real_path[homelen] = '/'; - real_path[homelen + 1] = '\0'; - if(working_path_len > 3) { - memcpy(real_path + homelen + 1, working_path + 3, - 1 + working_path_len -3); - } - } - else { - real_path = malloc(working_path_len + 1); - if(real_path == NULL) { - free(working_path); - return CURLE_OUT_OF_MEMORY; - } - memcpy(real_path, working_path, 1 + working_path_len); - } - } - - free(working_path); - - /* store the pointer for the caller to receive */ - *path = real_path; - - return CURLE_OK; -} #ifdef HAVE_LIBSSH2_KNOWNHOST_API static int sshkeycallback(struct Curl_easy *easy, @@ -1184,7 +1102,7 @@ static CURLcode ssh_statemach_act(struct connectdata *conn, bool *block) case SSH_SFTP_QUOTE_INIT: - result = ssh_getworkingpath(conn, sshc->homedir, &sftp_scp->path); + result = Curl_getworkingpath(conn, sshc->homedir, &sftp_scp->path); if(result) { sshc->actualcode = result; state(conn, SSH_STOP); @@ -1279,7 +1197,7 @@ static CURLcode ssh_statemach_act(struct connectdata *conn, bool *block) * also, every command takes at least one argument so we get that * first argument right now */ - result = get_pathname(&cp, &sshc->quote_path1); + result = Curl_get_pathname(&cp, &sshc->quote_path1); if(result) { if(result == CURLE_OUT_OF_MEMORY) failf(data, "Out of memory"); @@ -1304,7 +1222,7 @@ static CURLcode ssh_statemach_act(struct connectdata *conn, bool *block) /* sshc->quote_path1 contains the mode to set */ /* get the destination */ - result = get_pathname(&cp, &sshc->quote_path2); + result = Curl_get_pathname(&cp, &sshc->quote_path2); if(result) { if(result == CURLE_OUT_OF_MEMORY) failf(data, "Out of memory"); @@ -1326,7 +1244,7 @@ static CURLcode ssh_statemach_act(struct connectdata *conn, bool *block) /* symbolic linking */ /* sshc->quote_path1 is the source */ /* get the destination */ - result = get_pathname(&cp, &sshc->quote_path2); + result = Curl_get_pathname(&cp, &sshc->quote_path2); if(result) { if(result == CURLE_OUT_OF_MEMORY) failf(data, "Out of memory"); @@ -1351,7 +1269,7 @@ static CURLcode ssh_statemach_act(struct connectdata *conn, bool *block) /* rename file */ /* first param is the source path */ /* second param is the dest. path */ - result = get_pathname(&cp, &sshc->quote_path2); + result = Curl_get_pathname(&cp, &sshc->quote_path2); if(result) { if(result == CURLE_OUT_OF_MEMORY) failf(data, "Out of memory"); @@ -2399,7 +2317,7 @@ static CURLcode ssh_statemach_act(struct connectdata *conn, bool *block) break; case SSH_SCP_TRANS_INIT: - result = ssh_getworkingpath(conn, sshc->homedir, &sftp_scp->path); + result = Curl_getworkingpath(conn, sshc->homedir, &sftp_scp->path); if(result) { sshc->actualcode = result; state(conn, SSH_STOP); @@ -3307,93 +3225,6 @@ static ssize_t sftp_recv(struct connectdata *conn, int sockindex, return nread; } -/* The get_pathname() function is being borrowed from OpenSSH sftp.c - version 4.6p1. */ -/* - * Copyright (c) 2001-2004 Damien Miller - * - * Permission to use, copy, modify, and distribute this software for any - * purpose with or without fee is hereby granted, provided that the above - * copyright notice and this permission notice appear in all copies. - * - * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES - * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF - * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR - * ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES - * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN - * ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF - * OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE. - */ -static CURLcode -get_pathname(const char **cpp, char **path) -{ - const char *cp = *cpp, *end; - char quot; - unsigned int i, j; - static const char WHITESPACE[] = " \t\r\n"; - - cp += strspn(cp, WHITESPACE); - if(!*cp) { - *cpp = cp; - *path = NULL; - return CURLE_QUOTE_ERROR; - } - - *path = malloc(strlen(cp) + 1); - if(*path == NULL) - return CURLE_OUT_OF_MEMORY; - - /* Check for quoted filenames */ - if(*cp == '\"' || *cp == '\'') { - quot = *cp++; - - /* Search for terminating quote, unescape some chars */ - for(i = j = 0; i <= strlen(cp); i++) { - if(cp[i] == quot) { /* Found quote */ - i++; - (*path)[j] = '\0'; - break; - } - if(cp[i] == '\0') { /* End of string */ - /*error("Unterminated quote");*/ - goto fail; - } - if(cp[i] == '\\') { /* Escaped characters */ - i++; - if(cp[i] != '\'' && cp[i] != '\"' && - cp[i] != '\\') { - /*error("Bad escaped character '\\%c'", - cp[i]);*/ - goto fail; - } - } - (*path)[j++] = cp[i]; - } - - if(j == 0) { - /*error("Empty quotes");*/ - goto fail; - } - *cpp = cp + i + strspn(cp + i, WHITESPACE); - } - else { - /* Read to end of filename */ - end = strpbrk(cp, WHITESPACE); - if(end == NULL) - end = strchr(cp, '\0'); - *cpp = end + strspn(end, WHITESPACE); - - memcpy(*path, cp, end - cp); - (*path)[end - cp] = '\0'; - } - return CURLE_OK; - - fail: - Curl_safefree(*path); - return CURLE_QUOTE_ERROR; -} - - static const char *sftp_libssh2_strerror(int err) { switch(err) { -- cgit v1.2.3