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-rw-r--r--lib/polarssl.c596
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+/***************************************************************************
+ * _ _ ____ _
+ * Project ___| | | | _ \| |
+ * / __| | | | |_) | |
+ * | (__| |_| | _ <| |___
+ * \___|\___/|_| \_\_____|
+ *
+ * Copyright (C) 2010, 2011, Hoi-Ho Chan, <hoiho.chan@gmail.com>
+ * Copyright (C) 2012, 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 http://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.
+ *
+ ***************************************************************************/
+
+/*
+ * Source file for all PolarSSL-specific code for the TLS/SSL layer. No code
+ * but sslgen.c should ever call or use these functions.
+ *
+ */
+
+#include "setup.h"
+
+#ifdef USE_POLARSSL
+
+#include <polarssl/net.h>
+#include <polarssl/ssl.h>
+#include <polarssl/havege.h>
+#include <polarssl/certs.h>
+#include <polarssl/x509.h>
+#include <polarssl/version.h>
+
+#include <polarssl/entropy.h>
+#include <polarssl/ctr_drbg.h>
+
+#if POLARSSL_VERSION_NUMBER<0x01000000
+/*
+ Earlier versions of polarssl had no WANT_READ or WANT_WRITE, only TRY_AGAIN
+*/
+#define POLARSSL_ERR_NET_WANT_READ POLARSSL_ERR_NET_TRY_AGAIN
+#define POLARSSL_ERR_NET_WANT_WRITE POLARSSL_ERR_NET_TRY_AGAIN
+#endif
+
+#include "urldata.h"
+#include "sendf.h"
+#include "inet_pton.h"
+#include "polarssl.h"
+#include "sslgen.h"
+#include "parsedate.h"
+#include "connect.h" /* for the connect timeout */
+#include "select.h"
+#include "rawstr.h"
+
+#define _MPRINTF_REPLACE /* use our functions only */
+#include <curl/mprintf.h>
+#include "curl_memory.h"
+/* The last #include file should be: */
+#include "memdebug.h"
+
+/* version dependent differences */
+#if POLARSSL_VERSION_NUMBER < 0x01010000
+/* the old way */
+#define HAVEGE_RANDOM havege_rand
+#else
+/* from 1.1.0 */
+#define HAVEGE_RANDOM havege_random
+#endif
+
+/* Define this to enable lots of debugging for PolarSSL */
+#undef POLARSSL_DEBUG
+
+#ifdef POLARSSL_DEBUG
+static void polarssl_debug(void *context, int level, char *line)
+{
+ struct SessionHandle *data = NULL;
+
+ if(!context)
+ return;
+
+ data = (struct SessionHandle *)context;
+
+ infof(data, "%s\n", line);
+}
+#else
+#endif
+
+static Curl_recv polarssl_recv;
+static Curl_send polarssl_send;
+
+
+static CURLcode
+polarssl_connect_step1(struct connectdata *conn,
+ int sockindex)
+{
+ struct SessionHandle *data = conn->data;
+ struct ssl_connect_data* connssl = &conn->ssl[sockindex];
+
+ bool sni = TRUE; /* default is SNI enabled */
+ int ret = -1;
+#ifdef ENABLE_IPV6
+ struct in6_addr addr;
+#else
+ struct in_addr addr;
+#endif
+ void *old_session = NULL;
+ size_t old_session_size = 0;
+
+ /* PolarSSL only supports SSLv3 and TLSv1 */
+ if(data->set.ssl.version == CURL_SSLVERSION_SSLv2) {
+ failf(data, "PolarSSL does not support SSLv2");
+ return CURLE_SSL_CONNECT_ERROR;
+ }
+ else if(data->set.ssl.version == CURL_SSLVERSION_SSLv3)
+ sni = FALSE; /* SSLv3 has no SNI */
+
+ havege_init(&connssl->hs);
+
+ /* Load the trusted CA */
+ memset(&connssl->cacert, 0, sizeof(x509_cert));
+
+ if(data->set.str[STRING_SSL_CAFILE]) {
+ ret = x509parse_crtfile(&connssl->cacert,
+ data->set.str[STRING_SSL_CAFILE]);
+
+ if(ret<0) {
+ failf(data, "Error reading ca cert file %s: -0x%04X",
+ data->set.str[STRING_SSL_CAFILE], ret);
+
+ if(data->set.ssl.verifypeer)
+ return CURLE_SSL_CACERT_BADFILE;
+ }
+ }
+
+ /* Load the client certificate */
+ memset(&connssl->clicert, 0, sizeof(x509_cert));
+
+ if(data->set.str[STRING_CERT]) {
+ ret = x509parse_crtfile(&connssl->clicert,
+ data->set.str[STRING_CERT]);
+
+ if(ret) {
+ failf(data, "Error reading client cert file %s: -0x%04X",
+ data->set.str[STRING_CERT], -ret);
+ return CURLE_SSL_CERTPROBLEM;
+ }
+ }
+
+ /* Load the client private key */
+ if(data->set.str[STRING_KEY]) {
+ ret = x509parse_keyfile(&connssl->rsa,
+ data->set.str[STRING_KEY],
+ data->set.str[STRING_KEY_PASSWD]);
+
+ if(ret) {
+ failf(data, "Error reading private key %s: -0x%04X",
+ data->set.str[STRING_KEY], -ret);
+ return CURLE_SSL_CERTPROBLEM;
+ }
+ }
+
+ /* Load the CRL */
+ memset(&connssl->crl, 0, sizeof(x509_crl));
+
+ if(data->set.str[STRING_SSL_CRLFILE]) {
+ ret = x509parse_crlfile(&connssl->crl,
+ data->set.str[STRING_SSL_CRLFILE]);
+
+ if(ret) {
+ failf(data, "Error reading CRL file %s: -0x%04X",
+ data->set.str[STRING_SSL_CRLFILE], -ret);
+ return CURLE_SSL_CRL_BADFILE;
+ }
+ }
+
+ infof(data, "PolarSSL: Connecting to %s:%d\n",
+ conn->host.name, conn->remote_port);
+
+ if(ssl_init(&connssl->ssl)) {
+ failf(data, "PolarSSL: ssl_init failed");
+ return CURLE_SSL_CONNECT_ERROR;
+ }
+
+ ssl_set_endpoint(&connssl->ssl, SSL_IS_CLIENT);
+ ssl_set_authmode(&connssl->ssl, SSL_VERIFY_OPTIONAL);
+
+ ssl_set_rng(&connssl->ssl, HAVEGE_RANDOM,
+ &connssl->hs);
+ ssl_set_bio(&connssl->ssl,
+ net_recv, &conn->sock[sockindex],
+ net_send, &conn->sock[sockindex]);
+
+
+#if POLARSSL_VERSION_NUMBER<0x01000000
+ ssl_set_ciphers(&connssl->ssl, ssl_default_ciphers);
+#else
+ ssl_set_ciphersuites(&connssl->ssl, ssl_default_ciphersuites);
+#endif
+ if(!Curl_ssl_getsessionid(conn, &old_session, &old_session_size)) {
+ memcpy(&connssl->ssn, old_session, old_session_size);
+ infof(data, "PolarSSL re-using session\n");
+ }
+
+/* PolarSSL SVN revision r1316 to r1317, matching <1.2.0 is to cover Ubuntu's
+ 1.1.4 version and the like */
+#if POLARSSL_VERSION_NUMBER<0x01020000
+ ssl_set_session(&connssl->ssl, 1, 600,
+ &connssl->ssn);
+#else
+ ssl_set_session(&connssl->ssl,
+ &connssl->ssn);
+#endif
+
+ ssl_set_ca_chain(&connssl->ssl,
+ &connssl->cacert,
+ &connssl->crl,
+ conn->host.name);
+
+ ssl_set_own_cert(&connssl->ssl,
+ &connssl->clicert, &connssl->rsa);
+
+ if(!Curl_inet_pton(AF_INET, conn->host.name, &addr) &&
+#ifdef ENABLE_IPV6
+ !Curl_inet_pton(AF_INET6, conn->host.name, &addr) &&
+#endif
+ sni && ssl_set_hostname(&connssl->ssl, conn->host.name)) {
+ infof(data, "WARNING: failed to configure "
+ "server name indication (SNI) TLS extension\n");
+ }
+
+#ifdef POLARSSL_DEBUG
+ ssl_set_dbg(&connssl->ssl, polarssl_debug, data);
+#endif
+
+ connssl->connecting_state = ssl_connect_2;
+
+ return CURLE_OK;
+}
+
+static CURLcode
+polarssl_connect_step2(struct connectdata *conn,
+ int sockindex)
+{
+ int ret;
+ struct SessionHandle *data = conn->data;
+ struct ssl_connect_data* connssl = &conn->ssl[sockindex];
+ char buffer[1024];
+
+ conn->recv[sockindex] = polarssl_recv;
+ conn->send[sockindex] = polarssl_send;
+
+ for(;;) {
+ if(!(ret = ssl_handshake(&connssl->ssl)))
+ break;
+ else if(ret != POLARSSL_ERR_NET_WANT_READ &&
+ ret != POLARSSL_ERR_NET_WANT_WRITE) {
+ failf(data, "ssl_handshake returned -0x%04X", -ret);
+ return CURLE_SSL_CONNECT_ERROR;
+ }
+ else {
+ if(ret == POLARSSL_ERR_NET_WANT_READ) {
+ connssl->connecting_state = ssl_connect_2_reading;
+ return CURLE_OK;
+ }
+ if(ret == POLARSSL_ERR_NET_WANT_WRITE) {
+ connssl->connecting_state = ssl_connect_2_writing;
+ return CURLE_OK;
+ }
+ failf(data, "SSL_connect failed with error %d.", ret);
+ return CURLE_SSL_CONNECT_ERROR;
+
+ }
+ }
+
+ infof(data, "PolarSSL: Handshake complete, cipher is %s\n",
+#if POLARSSL_VERSION_NUMBER<0x01000000
+ ssl_get_cipher(&conn->ssl[sockindex].ssl)
+#elif POLARSSL_VERSION_NUMBER >= 0x01010000
+ ssl_get_ciphersuite(&conn->ssl[sockindex].ssl)
+#else
+ ssl_get_ciphersuite_name(&conn->ssl[sockindex].ssl)
+#endif
+ );
+
+ ret = ssl_get_verify_result(&conn->ssl[sockindex].ssl);
+
+ if(ret && data->set.ssl.verifypeer) {
+ if(ret & BADCERT_EXPIRED)
+ failf(data, "Cert verify failed: BADCERT_EXPIRED");
+
+ if(ret & BADCERT_REVOKED) {
+ failf(data, "Cert verify failed: BADCERT_REVOKED");
+ return CURLE_SSL_CACERT;
+ }
+
+ if(ret & BADCERT_CN_MISMATCH)
+ failf(data, "Cert verify failed: BADCERT_CN_MISMATCH");
+
+ if(ret & BADCERT_NOT_TRUSTED)
+ failf(data, "Cert verify failed: BADCERT_NOT_TRUSTED");
+
+ return CURLE_PEER_FAILED_VERIFICATION;
+ }
+
+/* PolarSSL SVN revision r1316 to r1317, matching <1.2.0 is to cover Ubuntu's
+ 1.1.4 version and the like */
+#if POLARSSL_VERSION_NUMBER<0x01020000
+ if(conn->ssl[sockindex].ssl.peer_cert) {
+#else
+ if(ssl_get_peer_cert(&(connssl->ssl))) {
+#endif
+ /* If the session was resumed, there will be no peer certs */
+ memset(buffer, 0, sizeof(buffer));
+
+/* PolarSSL SVN revision r1316 to r1317, matching <1.2.0 is to cover Ubuntu's
+ 1.1.4 version and the like */
+#if POLARSSL_VERSION_NUMBER<0x01020000
+ if(x509parse_cert_info(buffer, sizeof(buffer), (char *)"* ",
+ conn->ssl[sockindex].ssl.peer_cert) != -1)
+#else
+ if(x509parse_cert_info(buffer, sizeof(buffer), (char *)"* ",
+ ssl_get_peer_cert(&(connssl->ssl))) != -1)
+#endif
+ infof(data, "Dumping cert info:\n%s\n", buffer);
+ }
+
+ connssl->connecting_state = ssl_connect_3;
+ infof(data, "SSL connected\n");
+
+ return CURLE_OK;
+}
+
+static CURLcode
+polarssl_connect_step3(struct connectdata *conn,
+ int sockindex)
+{
+ CURLcode retcode = CURLE_OK;
+ struct ssl_connect_data *connssl = &conn->ssl[sockindex];
+ struct SessionHandle *data = conn->data;
+ void *old_ssl_sessionid = NULL;
+ ssl_session *our_ssl_sessionid = &conn->ssl[sockindex].ssn ;
+ int incache;
+
+ DEBUGASSERT(ssl_connect_3 == connssl->connecting_state);
+
+ /* Save the current session data for possible re-use */
+ incache = !(Curl_ssl_getsessionid(conn, &old_ssl_sessionid, NULL));
+ if(incache) {
+ if(old_ssl_sessionid != our_ssl_sessionid) {
+ infof(data, "old SSL session ID is stale, removing\n");
+ Curl_ssl_delsessionid(conn, old_ssl_sessionid);
+ incache = FALSE;
+ }
+ }
+ if(!incache) {
+ void *new_session = malloc(sizeof(ssl_session));
+
+ if(new_session) {
+ memcpy(new_session, our_ssl_sessionid,
+ sizeof(ssl_session));
+
+ retcode = Curl_ssl_addsessionid(conn, new_session,
+ sizeof(ssl_session));
+ }
+ else {
+ retcode = CURLE_OUT_OF_MEMORY;
+ }
+
+ if(retcode) {
+ failf(data, "failed to store ssl session");
+ return retcode;
+ }
+ }
+
+ connssl->connecting_state = ssl_connect_done;
+
+ return CURLE_OK;
+}
+
+static ssize_t polarssl_send(struct connectdata *conn,
+ int sockindex,
+ const void *mem,
+ size_t len,
+ CURLcode *curlcode)
+{
+ int ret = -1;
+
+ ret = ssl_write(&conn->ssl[sockindex].ssl,
+ (unsigned char *)mem, len);
+
+ if(ret < 0) {
+ *curlcode = (ret == POLARSSL_ERR_NET_WANT_WRITE) ?
+ CURLE_AGAIN : CURLE_SEND_ERROR;
+ ret = -1;
+ }
+
+ return ret;
+}
+
+void Curl_polarssl_close_all(struct SessionHandle *data)
+{
+ (void)data;
+}
+
+void Curl_polarssl_close(struct connectdata *conn, int sockindex)
+{
+ rsa_free(&conn->ssl[sockindex].rsa);
+ x509_free(&conn->ssl[sockindex].clicert);
+ x509_free(&conn->ssl[sockindex].cacert);
+ x509_crl_free(&conn->ssl[sockindex].crl);
+ ssl_free(&conn->ssl[sockindex].ssl);
+}
+
+static ssize_t polarssl_recv(struct connectdata *conn,
+ int num,
+ char *buf,
+ size_t buffersize,
+ CURLcode *curlcode)
+{
+ int ret = -1;
+ ssize_t len = -1;
+
+ memset(buf, 0, buffersize);
+ ret = ssl_read(&conn->ssl[num].ssl, (unsigned char *)buf, buffersize);
+
+ if(ret <= 0) {
+ if(ret == POLARSSL_ERR_SSL_PEER_CLOSE_NOTIFY)
+ return 0;
+
+ *curlcode = (ret == POLARSSL_ERR_NET_WANT_READ) ?
+ CURLE_AGAIN : CURLE_RECV_ERROR;
+ return -1;
+ }
+
+ len = ret;
+
+ return len;
+}
+
+void Curl_polarssl_session_free(void *ptr)
+{
+ free(ptr);
+}
+
+size_t Curl_polarssl_version(char *buffer, size_t size)
+{
+ unsigned int version = version_get_number();
+ return snprintf(buffer, size, "PolarSSL/%d.%d.%d", version>>24,
+ (version>>16)&0xff, (version>>8)&0xff);
+}
+
+static CURLcode
+polarssl_connect_common(struct connectdata *conn,
+ int sockindex,
+ bool nonblocking,
+ bool *done)
+{
+ CURLcode retcode;
+ struct SessionHandle *data = conn->data;
+ struct ssl_connect_data *connssl = &conn->ssl[sockindex];
+ curl_socket_t sockfd = conn->sock[sockindex];
+ long timeout_ms;
+ int what;
+
+ /* check if the connection has already been established */
+ if(ssl_connection_complete == connssl->state) {
+ *done = TRUE;
+ return CURLE_OK;
+ }
+
+ if(ssl_connect_1==connssl->connecting_state) {
+ /* Find out how much more time we're allowed */
+ timeout_ms = Curl_timeleft(data, NULL, TRUE);
+
+ if(timeout_ms < 0) {
+ /* no need to continue if time already is up */
+ failf(data, "SSL connection timeout");
+ return CURLE_OPERATION_TIMEDOUT;
+ }
+ retcode = polarssl_connect_step1(conn, sockindex);
+ if(retcode)
+ return retcode;
+ }
+
+ while(ssl_connect_2 == connssl->connecting_state ||
+ ssl_connect_2_reading == connssl->connecting_state ||
+ ssl_connect_2_writing == connssl->connecting_state) {
+
+ /* check allowed time left */
+ timeout_ms = Curl_timeleft(data, NULL, TRUE);
+
+ if(timeout_ms < 0) {
+ /* no need to continue if time already is up */
+ failf(data, "SSL connection timeout");
+ return CURLE_OPERATION_TIMEDOUT;
+ }
+
+ /* if ssl is expecting something, check if it's available. */
+ if(connssl->connecting_state == ssl_connect_2_reading
+ || connssl->connecting_state == ssl_connect_2_writing) {
+
+ curl_socket_t writefd = ssl_connect_2_writing==
+ connssl->connecting_state?sockfd:CURL_SOCKET_BAD;
+ curl_socket_t readfd = ssl_connect_2_reading==
+ connssl->connecting_state?sockfd:CURL_SOCKET_BAD;
+
+ what = Curl_socket_ready(readfd, writefd, nonblocking?0:timeout_ms);
+ if(what < 0) {
+ /* fatal error */
+ failf(data, "select/poll on SSL socket, errno: %d", SOCKERRNO);
+ return CURLE_SSL_CONNECT_ERROR;
+ }
+ else if(0 == what) {
+ if(nonblocking) {
+ *done = FALSE;
+ return CURLE_OK;
+ }
+ else {
+ /* timeout */
+ failf(data, "SSL connection timeout");
+ return CURLE_OPERATION_TIMEDOUT;
+ }
+ }
+ /* socket is readable or writable */
+ }
+
+ /* Run transaction, and return to the caller if it failed or if
+ * this connection is part of a multi handle and this loop would
+ * execute again. This permits the owner of a multi handle to
+ * abort a connection attempt before step2 has completed while
+ * ensuring that a client using select() or epoll() will always
+ * have a valid fdset to wait on.
+ */
+ retcode = polarssl_connect_step2(conn, sockindex);
+ if(retcode || (nonblocking &&
+ (ssl_connect_2 == connssl->connecting_state ||
+ ssl_connect_2_reading == connssl->connecting_state ||
+ ssl_connect_2_writing == connssl->connecting_state)))
+ return retcode;
+
+ } /* repeat step2 until all transactions are done. */
+
+ if(ssl_connect_3==connssl->connecting_state) {
+ retcode = polarssl_connect_step3(conn, sockindex);
+ if(retcode)
+ return retcode;
+ }
+
+ if(ssl_connect_done==connssl->connecting_state) {
+ connssl->state = ssl_connection_complete;
+ conn->recv[sockindex] = polarssl_recv;
+ conn->send[sockindex] = polarssl_send;
+ *done = TRUE;
+ }
+ else
+ *done = FALSE;
+
+ /* Reset our connect state machine */
+ connssl->connecting_state = ssl_connect_1;
+
+ return CURLE_OK;
+}
+
+CURLcode
+Curl_polarssl_connect_nonblocking(struct connectdata *conn,
+ int sockindex,
+ bool *done)
+{
+ return polarssl_connect_common(conn, sockindex, TRUE, done);
+}
+
+
+CURLcode
+Curl_polarssl_connect(struct connectdata *conn,
+ int sockindex)
+{
+ CURLcode retcode;
+ bool done = FALSE;
+
+ retcode = polarssl_connect_common(conn, sockindex, FALSE, &done);
+ if(retcode)
+ return retcode;
+
+ DEBUGASSERT(done);
+
+ return CURLE_OK;
+}
+
+#endif