1 /***************************************************************************
3 * Project ___| | | | _ \| |
5 * | (__| |_| | _ <| |___
6 * \___|\___/|_| \_\_____|
8 * Copyright (C) 1998 - 2013, Daniel Stenberg, <daniel@haxx.se>, et al.
10 * This software is licensed as described in the file COPYING, which
11 * you should have received as part of this distribution. The terms
12 * are also available at http://curl.haxx.se/docs/copyright.html.
14 * You may opt to use, copy, modify, merge, publish, distribute and/or sell
15 * copies of the Software, and permit persons to whom the Software is
16 * furnished to do so, under the terms of the COPYING file.
18 * This software is distributed on an "AS IS" basis, WITHOUT WARRANTY OF ANY
19 * KIND, either express or implied.
21 ***************************************************************************/
24 * Source file for all CyaSSL-specific code for the TLS/SSL layer. No code
25 * but vtls.c should ever call or use these functions.
29 #include "curl_setup.h"
39 #include "inet_pton.h"
42 #include "parsedate.h"
43 #include "connect.h" /* for the connect timeout */
47 #define _MPRINTF_REPLACE /* use our functions only */
48 #include <curl/mprintf.h>
49 #include "curl_memory.h"
51 #include <cyassl/ssl.h>
52 #ifdef HAVE_CYASSL_ERROR_SSL_H
53 #include <cyassl/error-ssl.h>
55 #include <cyassl/error.h>
58 /* The last #include file should be: */
61 static Curl_recv cyassl_recv;
62 static Curl_send cyassl_send;
65 static int do_file_type(const char *type)
68 return SSL_FILETYPE_PEM;
69 if(Curl_raw_equal(type, "PEM"))
70 return SSL_FILETYPE_PEM;
71 if(Curl_raw_equal(type, "DER"))
72 return SSL_FILETYPE_ASN1;
77 * This function loads all the client/CA certificates and CRLs. Setup the TLS
78 * layer and do all necessary magic.
81 cyassl_connect_step1(struct connectdata *conn,
84 struct SessionHandle *data = conn->data;
85 struct ssl_connect_data* conssl = &conn->ssl[sockindex];
86 SSL_METHOD* req_method = NULL;
87 void* ssl_sessionid = NULL;
88 curl_socket_t sockfd = conn->sock[sockindex];
90 if(conssl->state == ssl_connection_complete)
93 /* CyaSSL doesn't support SSLv2 */
94 if(data->set.ssl.version == CURL_SSLVERSION_SSLv2) {
95 failf(data, "CyaSSL does not support SSLv2");
96 return CURLE_SSL_CONNECT_ERROR;
99 /* check to see if we've been told to use an explicit SSL/TLS version */
100 switch(data->set.ssl.version) {
101 case CURL_SSLVERSION_DEFAULT:
102 /* we try to figure out version */
103 req_method = SSLv23_client_method();
105 case CURL_SSLVERSION_TLSv1:
106 infof(data, "CyaSSL cannot be configured to use TLS 1.0-1.2, "
107 "TLS 1.0 is used exclusively\n");
108 req_method = TLSv1_client_method();
110 case CURL_SSLVERSION_TLSv1_0:
111 req_method = TLSv1_client_method();
113 case CURL_SSLVERSION_TLSv1_1:
114 req_method = TLSv1_1_client_method();
116 case CURL_SSLVERSION_TLSv1_2:
117 req_method = TLSv1_2_client_method();
119 case CURL_SSLVERSION_SSLv3:
120 req_method = SSLv3_client_method();
123 req_method = TLSv1_client_method();
127 failf(data, "SSL: couldn't create a method!");
128 return CURLE_OUT_OF_MEMORY;
132 SSL_CTX_free(conssl->ctx);
133 conssl->ctx = SSL_CTX_new(req_method);
136 failf(data, "SSL: couldn't create a context!");
137 return CURLE_OUT_OF_MEMORY;
140 #ifndef NO_FILESYSTEM
141 /* load trusted cacert */
142 if(data->set.str[STRING_SSL_CAFILE]) {
143 if(!SSL_CTX_load_verify_locations(conssl->ctx,
144 data->set.str[STRING_SSL_CAFILE],
145 data->set.str[STRING_SSL_CAPATH])) {
146 if(data->set.ssl.verifypeer) {
147 /* Fail if we insiste on successfully verifying the server. */
148 failf(data,"error setting certificate verify locations:\n"
149 " CAfile: %s\n CApath: %s",
150 data->set.str[STRING_SSL_CAFILE]?
151 data->set.str[STRING_SSL_CAFILE]: "none",
152 data->set.str[STRING_SSL_CAPATH]?
153 data->set.str[STRING_SSL_CAPATH] : "none");
154 return CURLE_SSL_CACERT_BADFILE;
157 /* Just continue with a warning if no strict certificate
158 verification is required. */
159 infof(data, "error setting certificate verify locations,"
160 " continuing anyway:\n");
164 /* Everything is fine. */
165 infof(data, "successfully set certificate verify locations:\n");
170 data->set.str[STRING_SSL_CAFILE] ? data->set.str[STRING_SSL_CAFILE]:
172 data->set.str[STRING_SSL_CAPATH] ? data->set.str[STRING_SSL_CAPATH]:
176 /* Load the client certificate, and private key */
177 if(data->set.str[STRING_CERT] && data->set.str[STRING_KEY]) {
178 int file_type = do_file_type(data->set.str[STRING_CERT_TYPE]);
180 if(SSL_CTX_use_certificate_file(conssl->ctx, data->set.str[STRING_CERT],
182 failf(data, "unable to use client certificate (no key or wrong pass"
184 return CURLE_SSL_CONNECT_ERROR;
187 file_type = do_file_type(data->set.str[STRING_KEY_TYPE]);
188 if(SSL_CTX_use_PrivateKey_file(conssl->ctx, data->set.str[STRING_KEY],
190 failf(data, "unable to set private key");
191 return CURLE_SSL_CONNECT_ERROR;
195 if(CyaSSL_no_filesystem_verify(conssl->ctx)!= SSL_SUCCESS) {
196 return CURLE_SSL_CONNECT_ERROR;
198 #endif /* NO_FILESYSTEM */
200 /* SSL always tries to verify the peer, this only says whether it should
201 * fail to connect if the verification fails, or if it should continue
202 * anyway. In the latter case the result of the verification is checked with
203 * SSL_get_verify_result() below. */
204 SSL_CTX_set_verify(conssl->ctx,
205 data->set.ssl.verifypeer?SSL_VERIFY_PEER:SSL_VERIFY_NONE,
208 /* Let's make an SSL structure */
210 SSL_free(conssl->handle);
211 conssl->handle = SSL_new(conssl->ctx);
212 if(!conssl->handle) {
213 failf(data, "SSL: couldn't create a context (handle)!");
214 return CURLE_OUT_OF_MEMORY;
217 /* Check if there's a cached ID we can/should use here! */
218 if(!Curl_ssl_getsessionid(conn, &ssl_sessionid, NULL)) {
219 /* we got a session id, use it! */
220 if(!SSL_set_session(conssl->handle, ssl_sessionid)) {
221 failf(data, "SSL: SSL_set_session failed: %s",
222 ERR_error_string(SSL_get_error(conssl->handle, 0),NULL));
223 return CURLE_SSL_CONNECT_ERROR;
225 /* Informational message */
226 infof (data, "SSL re-using session ID\n");
229 /* pass the raw socket into the SSL layer */
230 if(!SSL_set_fd(conssl->handle, (int)sockfd)) {
231 failf(data, "SSL: SSL_set_fd failed");
232 return CURLE_SSL_CONNECT_ERROR;
235 conssl->connecting_state = ssl_connect_2;
241 cyassl_connect_step2(struct connectdata *conn,
245 struct SessionHandle *data = conn->data;
246 struct ssl_connect_data* conssl = &conn->ssl[sockindex];
248 infof(data, "CyaSSL: Connecting to %s:%d\n",
249 conn->host.name, conn->remote_port);
251 conn->recv[sockindex] = cyassl_recv;
252 conn->send[sockindex] = cyassl_send;
254 /* Enable RFC2818 checks */
255 if(data->set.ssl.verifyhost) {
256 ret = CyaSSL_check_domain_name(conssl->handle, conn->host.name);
257 if(ret == SSL_FAILURE)
258 return CURLE_OUT_OF_MEMORY;
261 ret = SSL_connect(conssl->handle);
263 char error_buffer[80];
264 int detail = SSL_get_error(conssl->handle, ret);
266 if(SSL_ERROR_WANT_READ == detail) {
267 conssl->connecting_state = ssl_connect_2_reading;
270 else if(SSL_ERROR_WANT_WRITE == detail) {
271 conssl->connecting_state = ssl_connect_2_writing;
274 /* There is no easy way to override only the CN matching.
275 * This will enable the override of both mismatching SubjectAltNames
276 * as also mismatching CN fields */
277 else if(DOMAIN_NAME_MISMATCH == detail) {
279 failf(data, "\tsubject alt name(s) or common name do not match \"%s\"\n",
280 conn->host.dispname);
281 return CURLE_PEER_FAILED_VERIFICATION;
283 /* When the CyaSSL_check_domain_name() is used and you desire to continue
284 * on a DOMAIN_NAME_MISMATCH, i.e. 'data->set.ssl.verifyhost == 0',
285 * CyaSSL version 2.4.0 will fail with an INCOMPLETE_DATA error. The only
286 * way to do this is currently to switch the CyaSSL_check_domain_name()
287 * in and out based on the 'data->set.ssl.verifyhost' value. */
288 if(data->set.ssl.verifyhost) {
290 "\tsubject alt name(s) or common name do not match \"%s\"\n",
291 conn->host.dispname);
292 return CURLE_PEER_FAILED_VERIFICATION;
296 "\tsubject alt name(s) and/or common name do not match \"%s\"\n",
297 conn->host.dispname);
303 failf(data, "SSL_connect failed with error %d: %s", detail,
304 ERR_error_string(detail, error_buffer));
305 return CURLE_SSL_CONNECT_ERROR;
309 conssl->connecting_state = ssl_connect_3;
310 infof(data, "SSL connected\n");
317 cyassl_connect_step3(struct connectdata *conn,
320 CURLcode retcode = CURLE_OK;
321 void *old_ssl_sessionid=NULL;
322 struct SessionHandle *data = conn->data;
323 struct ssl_connect_data *connssl = &conn->ssl[sockindex];
325 SSL_SESSION *our_ssl_sessionid;
327 DEBUGASSERT(ssl_connect_3 == connssl->connecting_state);
329 our_ssl_sessionid = SSL_get_session(connssl->handle);
331 incache = !(Curl_ssl_getsessionid(conn, &old_ssl_sessionid, NULL));
333 if(old_ssl_sessionid != our_ssl_sessionid) {
334 infof(data, "old SSL session ID is stale, removing\n");
335 Curl_ssl_delsessionid(conn, old_ssl_sessionid);
340 retcode = Curl_ssl_addsessionid(conn, our_ssl_sessionid,
341 0 /* unknown size */);
343 failf(data, "failed to store ssl session");
348 connssl->connecting_state = ssl_connect_done;
354 static ssize_t cyassl_send(struct connectdata *conn,
360 char error_buffer[80];
361 int memlen = (len > (size_t)INT_MAX) ? INT_MAX : (int)len;
362 int rc = SSL_write(conn->ssl[sockindex].handle, mem, memlen);
365 int err = SSL_get_error(conn->ssl[sockindex].handle, rc);
368 case SSL_ERROR_WANT_READ:
369 case SSL_ERROR_WANT_WRITE:
370 /* there's data pending, re-invoke SSL_write() */
371 *curlcode = CURLE_AGAIN;
374 failf(conn->data, "SSL write: %s, errno %d",
375 ERR_error_string(err, error_buffer),
377 *curlcode = CURLE_SEND_ERROR;
384 void Curl_cyassl_close_all(struct SessionHandle *data)
389 void Curl_cyassl_close(struct connectdata *conn, int sockindex)
391 struct ssl_connect_data *conssl = &conn->ssl[sockindex];
394 (void)SSL_shutdown(conssl->handle);
395 SSL_free (conssl->handle);
396 conssl->handle = NULL;
399 SSL_CTX_free (conssl->ctx);
404 static ssize_t cyassl_recv(struct connectdata *conn,
410 char error_buffer[80];
411 int buffsize = (buffersize > (size_t)INT_MAX) ? INT_MAX : (int)buffersize;
412 int nread = SSL_read(conn->ssl[num].handle, buf, buffsize);
415 int err = SSL_get_error(conn->ssl[num].handle, nread);
418 case SSL_ERROR_ZERO_RETURN: /* no more data */
420 case SSL_ERROR_WANT_READ:
421 case SSL_ERROR_WANT_WRITE:
422 /* there's data pending, re-invoke SSL_read() */
423 *curlcode = CURLE_AGAIN;
426 failf(conn->data, "SSL read: %s, errno %d",
427 ERR_error_string(err, error_buffer),
429 *curlcode = CURLE_RECV_ERROR;
437 void Curl_cyassl_session_free(void *ptr)
440 /* CyaSSL reuses sessions on own, no free */
444 size_t Curl_cyassl_version(char *buffer, size_t size)
446 #ifdef CYASSL_VERSION
447 return snprintf(buffer, size, "CyaSSL/%s", CYASSL_VERSION);
449 return snprintf(buffer, size, "CyaSSL/%s", "<1.8.8");
454 int Curl_cyassl_init(void)
456 if(CyaSSL_Init() == 0)
463 bool Curl_cyassl_data_pending(const struct connectdata* conn, int connindex)
465 if(conn->ssl[connindex].handle) /* SSL is in use */
466 return (0 != SSL_pending(conn->ssl[connindex].handle)) ? TRUE : FALSE;
473 * This function is called to shut down the SSL layer but keep the
474 * socket open (CCC - Clear Command Channel)
476 int Curl_cyassl_shutdown(struct connectdata *conn, int sockindex)
479 struct ssl_connect_data *connssl = &conn->ssl[sockindex];
481 if(connssl->handle) {
482 SSL_free (connssl->handle);
483 connssl->handle = NULL;
490 cyassl_connect_common(struct connectdata *conn,
496 struct SessionHandle *data = conn->data;
497 struct ssl_connect_data *connssl = &conn->ssl[sockindex];
498 curl_socket_t sockfd = conn->sock[sockindex];
502 /* check if the connection has already been established */
503 if(ssl_connection_complete == connssl->state) {
508 if(ssl_connect_1==connssl->connecting_state) {
509 /* Find out how much more time we're allowed */
510 timeout_ms = Curl_timeleft(data, NULL, TRUE);
513 /* no need to continue if time already is up */
514 failf(data, "SSL connection timeout");
515 return CURLE_OPERATION_TIMEDOUT;
517 retcode = cyassl_connect_step1(conn, sockindex);
522 while(ssl_connect_2 == connssl->connecting_state ||
523 ssl_connect_2_reading == connssl->connecting_state ||
524 ssl_connect_2_writing == connssl->connecting_state) {
526 /* check allowed time left */
527 timeout_ms = Curl_timeleft(data, NULL, TRUE);
530 /* no need to continue if time already is up */
531 failf(data, "SSL connection timeout");
532 return CURLE_OPERATION_TIMEDOUT;
535 /* if ssl is expecting something, check if it's available. */
536 if(connssl->connecting_state == ssl_connect_2_reading
537 || connssl->connecting_state == ssl_connect_2_writing) {
539 curl_socket_t writefd = ssl_connect_2_writing==
540 connssl->connecting_state?sockfd:CURL_SOCKET_BAD;
541 curl_socket_t readfd = ssl_connect_2_reading==
542 connssl->connecting_state?sockfd:CURL_SOCKET_BAD;
544 what = Curl_socket_ready(readfd, writefd, nonblocking?0:timeout_ms);
547 failf(data, "select/poll on SSL socket, errno: %d", SOCKERRNO);
548 return CURLE_SSL_CONNECT_ERROR;
557 failf(data, "SSL connection timeout");
558 return CURLE_OPERATION_TIMEDOUT;
561 /* socket is readable or writable */
564 /* Run transaction, and return to the caller if it failed or if
565 * this connection is part of a multi handle and this loop would
566 * execute again. This permits the owner of a multi handle to
567 * abort a connection attempt before step2 has completed while
568 * ensuring that a client using select() or epoll() will always
569 * have a valid fdset to wait on.
571 retcode = cyassl_connect_step2(conn, sockindex);
572 if(retcode || (nonblocking &&
573 (ssl_connect_2 == connssl->connecting_state ||
574 ssl_connect_2_reading == connssl->connecting_state ||
575 ssl_connect_2_writing == connssl->connecting_state)))
578 } /* repeat step2 until all transactions are done. */
580 if(ssl_connect_3==connssl->connecting_state) {
581 retcode = cyassl_connect_step3(conn, sockindex);
586 if(ssl_connect_done==connssl->connecting_state) {
587 connssl->state = ssl_connection_complete;
588 conn->recv[sockindex] = cyassl_recv;
589 conn->send[sockindex] = cyassl_send;
595 /* Reset our connect state machine */
596 connssl->connecting_state = ssl_connect_1;
603 Curl_cyassl_connect_nonblocking(struct connectdata *conn,
607 return cyassl_connect_common(conn, sockindex, TRUE, done);
612 Curl_cyassl_connect(struct connectdata *conn,
618 retcode = cyassl_connect_common(conn, sockindex, FALSE, &done);