1 /***************************************************************************
2 * _ _ ____ _
3 * Project ___| | | | _ \| |
4 * / __| | | | |_) | |
5 * | (__| |_| | _ <| |___
6 * \___|\___/|_| \_\_____|
7 *
8 * Copyright (C) 2012 - 2016, Daniel Stenberg, <daniel@haxx.se>, et al.
9 * Copyright (C) 2010 - 2011, Hoi-Ho Chan, <hoiho.chan@gmail.com>
10 *
11 * This software is licensed as described in the file COPYING, which
12 * you should have received as part of this distribution. The terms
13 * are also available at https://curl.haxx.se/docs/copyright.html.
14 *
15 * You may opt to use, copy, modify, merge, publish, distribute and/or sell
16 * copies of the Software, and permit persons to whom the Software is
17 * furnished to do so, under the terms of the COPYING file.
18 *
19 * This software is distributed on an "AS IS" basis, WITHOUT WARRANTY OF ANY
20 * KIND, either express or implied.
21 *
22 ***************************************************************************/
23
24 /*
25 * Source file for all PolarSSL-specific code for the TLS/SSL layer. No code
26 * but vtls.c should ever call or use these functions.
27 *
28 */
29
30 #include "curl_setup.h"
31
32 #ifdef USE_POLARSSL
33
34 #include <polarssl/net.h>
35 #include <polarssl/ssl.h>
36 #include <polarssl/certs.h>
37 #include <polarssl/x509.h>
38 #include <polarssl/version.h>
39 #include <polarssl/sha256.h>
40
41 #if POLARSSL_VERSION_NUMBER < 0x01030000
42 #error too old PolarSSL
43 #endif
44
45 #include <polarssl/error.h>
46 #include <polarssl/entropy.h>
47 #include <polarssl/ctr_drbg.h>
48
49 #include "urldata.h"
50 #include "sendf.h"
51 #include "inet_pton.h"
52 #include "polarssl.h"
53 #include "vtls.h"
54 #include "parsedate.h"
55 #include "connect.h" /* for the connect timeout */
56 #include "select.h"
57 #include "rawstr.h"
58 #include "polarssl_threadlock.h"
59 #include "curl_printf.h"
60 #include "curl_memory.h"
61 /* The last #include file should be: */
62 #include "memdebug.h"
63
64 /* See https://tls.mbed.org/discussions/generic/
65 howto-determine-exact-buffer-len-for-mbedtls_pk_write_pubkey_der
66 */
67 #define RSA_PUB_DER_MAX_BYTES (38 + 2 * POLARSSL_MPI_MAX_SIZE)
68 #define ECP_PUB_DER_MAX_BYTES (30 + 2 * POLARSSL_ECP_MAX_BYTES)
69
70 #define PUB_DER_MAX_BYTES (RSA_PUB_DER_MAX_BYTES > ECP_PUB_DER_MAX_BYTES ? \
71 RSA_PUB_DER_MAX_BYTES : ECP_PUB_DER_MAX_BYTES)
72
73 /* apply threading? */
74 #if defined(USE_THREADS_POSIX) || defined(USE_THREADS_WIN32)
75 #define THREADING_SUPPORT
76 #endif
77
78 #if defined(THREADING_SUPPORT)
79 static entropy_context entropy;
80
81 static int entropy_init_initialized = 0;
82
83 /* start of entropy_init_mutex() */
entropy_init_mutex(entropy_context * ctx)84 static void entropy_init_mutex(entropy_context *ctx)
85 {
86 /* lock 0 = entropy_init_mutex() */
87 Curl_polarsslthreadlock_lock_function(0);
88 if(entropy_init_initialized == 0) {
89 entropy_init(ctx);
90 entropy_init_initialized = 1;
91 }
92 Curl_polarsslthreadlock_unlock_function(0);
93 }
94 /* end of entropy_init_mutex() */
95
96 /* start of entropy_func_mutex() */
entropy_func_mutex(void * data,unsigned char * output,size_t len)97 static int entropy_func_mutex(void *data, unsigned char *output, size_t len)
98 {
99 int ret;
100 /* lock 1 = entropy_func_mutex() */
101 Curl_polarsslthreadlock_lock_function(1);
102 ret = entropy_func(data, output, len);
103 Curl_polarsslthreadlock_unlock_function(1);
104
105 return ret;
106 }
107 /* end of entropy_func_mutex() */
108
109 #endif /* THREADING_SUPPORT */
110
111 /* Define this to enable lots of debugging for PolarSSL */
112 #undef POLARSSL_DEBUG
113
114 #ifdef POLARSSL_DEBUG
polarssl_debug(void * context,int level,const char * line)115 static void polarssl_debug(void *context, int level, const char *line)
116 {
117 struct Curl_easy *data = NULL;
118
119 if(!context)
120 return;
121
122 data = (struct Curl_easy *)context;
123
124 infof(data, "%s", line);
125 (void) level;
126 }
127 #else
128 #endif
129
130 /* ALPN for http2? */
131 #ifdef POLARSSL_SSL_ALPN
132 # define HAS_ALPN
133 #endif
134
135 static Curl_recv polarssl_recv;
136 static Curl_send polarssl_send;
137
138
139 static CURLcode
polarssl_connect_step1(struct connectdata * conn,int sockindex)140 polarssl_connect_step1(struct connectdata *conn,
141 int sockindex)
142 {
143 struct Curl_easy *data = conn->data;
144 struct ssl_connect_data* connssl = &conn->ssl[sockindex];
145
146 bool sni = TRUE; /* default is SNI enabled */
147 int ret = -1;
148 #ifdef ENABLE_IPV6
149 struct in6_addr addr;
150 #else
151 struct in_addr addr;
152 #endif
153 char errorbuf[128];
154 errorbuf[0]=0;
155
156 /* PolarSSL only supports SSLv3 and TLSv1 */
157 if(data->set.ssl.version == CURL_SSLVERSION_SSLv2) {
158 failf(data, "PolarSSL does not support SSLv2");
159 return CURLE_SSL_CONNECT_ERROR;
160 }
161 else if(data->set.ssl.version == CURL_SSLVERSION_SSLv3)
162 sni = FALSE; /* SSLv3 has no SNI */
163
164 #ifdef THREADING_SUPPORT
165 entropy_init_mutex(&entropy);
166
167 if((ret = ctr_drbg_init(&connssl->ctr_drbg, entropy_func_mutex, &entropy,
168 NULL, 0)) != 0) {
169 #ifdef POLARSSL_ERROR_C
170 error_strerror(ret, errorbuf, sizeof(errorbuf));
171 #endif /* POLARSSL_ERROR_C */
172 failf(data, "Failed - PolarSSL: ctr_drbg_init returned (-0x%04X) %s\n",
173 -ret, errorbuf);
174 }
175 #else
176 entropy_init(&connssl->entropy);
177
178 if((ret = ctr_drbg_init(&connssl->ctr_drbg, entropy_func, &connssl->entropy,
179 NULL, 0)) != 0) {
180 #ifdef POLARSSL_ERROR_C
181 error_strerror(ret, errorbuf, sizeof(errorbuf));
182 #endif /* POLARSSL_ERROR_C */
183 failf(data, "Failed - PolarSSL: ctr_drbg_init returned (-0x%04X) %s\n",
184 -ret, errorbuf);
185 }
186 #endif /* THREADING_SUPPORT */
187
188 /* Load the trusted CA */
189 memset(&connssl->cacert, 0, sizeof(x509_crt));
190
191 if(data->set.str[STRING_SSL_CAFILE]) {
192 ret = x509_crt_parse_file(&connssl->cacert,
193 data->set.str[STRING_SSL_CAFILE]);
194
195 if(ret<0) {
196 #ifdef POLARSSL_ERROR_C
197 error_strerror(ret, errorbuf, sizeof(errorbuf));
198 #endif /* POLARSSL_ERROR_C */
199 failf(data, "Error reading ca cert file %s - PolarSSL: (-0x%04X) %s",
200 data->set.str[STRING_SSL_CAFILE], -ret, errorbuf);
201
202 if(data->set.ssl.verifypeer)
203 return CURLE_SSL_CACERT_BADFILE;
204 }
205 }
206
207 if(data->set.str[STRING_SSL_CAPATH]) {
208 ret = x509_crt_parse_path(&connssl->cacert,
209 data->set.str[STRING_SSL_CAPATH]);
210
211 if(ret<0) {
212 #ifdef POLARSSL_ERROR_C
213 error_strerror(ret, errorbuf, sizeof(errorbuf));
214 #endif /* POLARSSL_ERROR_C */
215 failf(data, "Error reading ca cert path %s - PolarSSL: (-0x%04X) %s",
216 data->set.str[STRING_SSL_CAPATH], -ret, errorbuf);
217
218 if(data->set.ssl.verifypeer)
219 return CURLE_SSL_CACERT_BADFILE;
220 }
221 }
222
223 /* Load the client certificate */
224 memset(&connssl->clicert, 0, sizeof(x509_crt));
225
226 if(data->set.str[STRING_CERT]) {
227 ret = x509_crt_parse_file(&connssl->clicert,
228 data->set.str[STRING_CERT]);
229
230 if(ret) {
231 #ifdef POLARSSL_ERROR_C
232 error_strerror(ret, errorbuf, sizeof(errorbuf));
233 #endif /* POLARSSL_ERROR_C */
234 failf(data, "Error reading client cert file %s - PolarSSL: (-0x%04X) %s",
235 data->set.str[STRING_CERT], -ret, errorbuf);
236
237 return CURLE_SSL_CERTPROBLEM;
238 }
239 }
240
241 /* Load the client private key */
242 if(data->set.str[STRING_KEY]) {
243 pk_context pk;
244 pk_init(&pk);
245 ret = pk_parse_keyfile(&pk, data->set.str[STRING_KEY],
246 data->set.str[STRING_KEY_PASSWD]);
247 if(ret == 0 && !pk_can_do(&pk, POLARSSL_PK_RSA))
248 ret = POLARSSL_ERR_PK_TYPE_MISMATCH;
249 if(ret == 0)
250 rsa_copy(&connssl->rsa, pk_rsa(pk));
251 else
252 rsa_free(&connssl->rsa);
253 pk_free(&pk);
254
255 if(ret) {
256 #ifdef POLARSSL_ERROR_C
257 error_strerror(ret, errorbuf, sizeof(errorbuf));
258 #endif /* POLARSSL_ERROR_C */
259 failf(data, "Error reading private key %s - PolarSSL: (-0x%04X) %s",
260 data->set.str[STRING_KEY], -ret, errorbuf);
261
262 return CURLE_SSL_CERTPROBLEM;
263 }
264 }
265
266 /* Load the CRL */
267 memset(&connssl->crl, 0, sizeof(x509_crl));
268
269 if(data->set.str[STRING_SSL_CRLFILE]) {
270 ret = x509_crl_parse_file(&connssl->crl,
271 data->set.str[STRING_SSL_CRLFILE]);
272
273 if(ret) {
274 #ifdef POLARSSL_ERROR_C
275 error_strerror(ret, errorbuf, sizeof(errorbuf));
276 #endif /* POLARSSL_ERROR_C */
277 failf(data, "Error reading CRL file %s - PolarSSL: (-0x%04X) %s",
278 data->set.str[STRING_SSL_CRLFILE], -ret, errorbuf);
279
280 return CURLE_SSL_CRL_BADFILE;
281 }
282 }
283
284 infof(data, "PolarSSL: Connecting to %s:%d\n",
285 conn->host.name, conn->remote_port);
286
287 if(ssl_init(&connssl->ssl)) {
288 failf(data, "PolarSSL: ssl_init failed");
289 return CURLE_SSL_CONNECT_ERROR;
290 }
291
292 switch(data->set.ssl.version) {
293 default:
294 case CURL_SSLVERSION_DEFAULT:
295 case CURL_SSLVERSION_TLSv1:
296 ssl_set_min_version(&connssl->ssl, SSL_MAJOR_VERSION_3,
297 SSL_MINOR_VERSION_1);
298 break;
299 case CURL_SSLVERSION_SSLv3:
300 ssl_set_min_version(&connssl->ssl, SSL_MAJOR_VERSION_3,
301 SSL_MINOR_VERSION_0);
302 ssl_set_max_version(&connssl->ssl, SSL_MAJOR_VERSION_3,
303 SSL_MINOR_VERSION_0);
304 infof(data, "PolarSSL: Forced min. SSL Version to be SSLv3\n");
305 break;
306 case CURL_SSLVERSION_TLSv1_0:
307 ssl_set_min_version(&connssl->ssl, SSL_MAJOR_VERSION_3,
308 SSL_MINOR_VERSION_1);
309 ssl_set_max_version(&connssl->ssl, SSL_MAJOR_VERSION_3,
310 SSL_MINOR_VERSION_1);
311 infof(data, "PolarSSL: Forced min. SSL Version to be TLS 1.0\n");
312 break;
313 case CURL_SSLVERSION_TLSv1_1:
314 ssl_set_min_version(&connssl->ssl, SSL_MAJOR_VERSION_3,
315 SSL_MINOR_VERSION_2);
316 ssl_set_max_version(&connssl->ssl, SSL_MAJOR_VERSION_3,
317 SSL_MINOR_VERSION_2);
318 infof(data, "PolarSSL: Forced min. SSL Version to be TLS 1.1\n");
319 break;
320 case CURL_SSLVERSION_TLSv1_2:
321 ssl_set_min_version(&connssl->ssl, SSL_MAJOR_VERSION_3,
322 SSL_MINOR_VERSION_3);
323 ssl_set_max_version(&connssl->ssl, SSL_MAJOR_VERSION_3,
324 SSL_MINOR_VERSION_3);
325 infof(data, "PolarSSL: Forced min. SSL Version to be TLS 1.2\n");
326 break;
327 }
328
329 ssl_set_endpoint(&connssl->ssl, SSL_IS_CLIENT);
330 ssl_set_authmode(&connssl->ssl, SSL_VERIFY_OPTIONAL);
331
332 ssl_set_rng(&connssl->ssl, ctr_drbg_random,
333 &connssl->ctr_drbg);
334 ssl_set_bio(&connssl->ssl,
335 net_recv, &conn->sock[sockindex],
336 net_send, &conn->sock[sockindex]);
337
338 ssl_set_ciphersuites(&connssl->ssl, ssl_list_ciphersuites());
339
340 /* Check if there's a cached ID we can/should use here! */
341 if(conn->ssl_config.sessionid) {
342 void *old_session = NULL;
343
344 Curl_ssl_sessionid_lock(conn);
345 if(!Curl_ssl_getsessionid(conn, &old_session, NULL)) {
346 ret = ssl_set_session(&connssl->ssl, old_session);
347 Curl_ssl_sessionid_unlock(conn);
348 if(ret) {
349 failf(data, "ssl_set_session returned -0x%x", -ret);
350 return CURLE_SSL_CONNECT_ERROR;
351 }
352 infof(data, "PolarSSL re-using session\n");
353 }
354 }
355
356 ssl_set_ca_chain(&connssl->ssl,
357 &connssl->cacert,
358 &connssl->crl,
359 conn->host.name);
360
361 ssl_set_own_cert_rsa(&connssl->ssl,
362 &connssl->clicert, &connssl->rsa);
363
364 if(ssl_set_hostname(&connssl->ssl, conn->host.name)) {
365 /* ssl_set_hostname() sets the name to use in CN/SAN checks *and* the name
366 to set in the SNI extension. So even if curl connects to a host
367 specified as an IP address, this function must be used. */
368 failf(data, "couldn't set hostname in PolarSSL");
369 return CURLE_SSL_CONNECT_ERROR;
370 }
371
372 #ifdef HAS_ALPN
373 if(conn->bits.tls_enable_alpn) {
374 static const char* protocols[3];
375 int cur = 0;
376
377 #ifdef USE_NGHTTP2
378 if(data->set.httpversion >= CURL_HTTP_VERSION_2) {
379 protocols[cur++] = NGHTTP2_PROTO_VERSION_ID;
380 infof(data, "ALPN, offering %s\n", NGHTTP2_PROTO_VERSION_ID);
381 }
382 #endif
383
384 protocols[cur++] = ALPN_HTTP_1_1;
385 infof(data, "ALPN, offering %s\n", ALPN_HTTP_1_1);
386
387 protocols[cur] = NULL;
388
389 ssl_set_alpn_protocols(&connssl->ssl, protocols);
390 }
391 #endif
392
393 #ifdef POLARSSL_DEBUG
394 ssl_set_dbg(&connssl->ssl, polarssl_debug, data);
395 #endif
396
397 connssl->connecting_state = ssl_connect_2;
398
399 return CURLE_OK;
400 }
401
402 static CURLcode
polarssl_connect_step2(struct connectdata * conn,int sockindex)403 polarssl_connect_step2(struct connectdata *conn,
404 int sockindex)
405 {
406 int ret;
407 struct Curl_easy *data = conn->data;
408 struct ssl_connect_data* connssl = &conn->ssl[sockindex];
409 char buffer[1024];
410
411 char errorbuf[128];
412 errorbuf[0] = 0;
413
414 conn->recv[sockindex] = polarssl_recv;
415 conn->send[sockindex] = polarssl_send;
416
417 ret = ssl_handshake(&connssl->ssl);
418
419 switch(ret) {
420 case 0:
421 break;
422
423 case POLARSSL_ERR_NET_WANT_READ:
424 connssl->connecting_state = ssl_connect_2_reading;
425 return CURLE_OK;
426
427 case POLARSSL_ERR_NET_WANT_WRITE:
428 connssl->connecting_state = ssl_connect_2_writing;
429 return CURLE_OK;
430
431 default:
432 #ifdef POLARSSL_ERROR_C
433 error_strerror(ret, errorbuf, sizeof(errorbuf));
434 #endif /* POLARSSL_ERROR_C */
435 failf(data, "ssl_handshake returned - PolarSSL: (-0x%04X) %s",
436 -ret, errorbuf);
437 return CURLE_SSL_CONNECT_ERROR;
438 }
439
440 infof(data, "PolarSSL: Handshake complete, cipher is %s\n",
441 ssl_get_ciphersuite(&conn->ssl[sockindex].ssl) );
442
443 ret = ssl_get_verify_result(&conn->ssl[sockindex].ssl);
444
445 if(ret && data->set.ssl.verifypeer) {
446 if(ret & BADCERT_EXPIRED)
447 failf(data, "Cert verify failed: BADCERT_EXPIRED");
448
449 if(ret & BADCERT_REVOKED) {
450 failf(data, "Cert verify failed: BADCERT_REVOKED");
451 return CURLE_SSL_CACERT;
452 }
453
454 if(ret & BADCERT_CN_MISMATCH)
455 failf(data, "Cert verify failed: BADCERT_CN_MISMATCH");
456
457 if(ret & BADCERT_NOT_TRUSTED)
458 failf(data, "Cert verify failed: BADCERT_NOT_TRUSTED");
459
460 return CURLE_PEER_FAILED_VERIFICATION;
461 }
462
463 if(ssl_get_peer_cert(&(connssl->ssl))) {
464 /* If the session was resumed, there will be no peer certs */
465 memset(buffer, 0, sizeof(buffer));
466
467 if(x509_crt_info(buffer, sizeof(buffer), (char *)"* ",
468 ssl_get_peer_cert(&(connssl->ssl))) != -1)
469 infof(data, "Dumping cert info:\n%s\n", buffer);
470 }
471
472 /* adapted from mbedtls.c */
473 if(data->set.str[STRING_SSL_PINNEDPUBLICKEY]) {
474 int size;
475 CURLcode result;
476 x509_crt *p;
477 unsigned char pubkey[PUB_DER_MAX_BYTES];
478 const x509_crt *peercert;
479
480 peercert = ssl_get_peer_cert(&connssl->ssl);
481
482 if(!peercert || !peercert->raw.p || !peercert->raw.len) {
483 failf(data, "Failed due to missing peer certificate");
484 return CURLE_SSL_PINNEDPUBKEYNOTMATCH;
485 }
486
487 p = calloc(1, sizeof(*p));
488
489 if(!p)
490 return CURLE_OUT_OF_MEMORY;
491
492 x509_crt_init(p);
493
494 /* Make a copy of our const peercert because pk_write_pubkey_der
495 needs a non-const key, for now.
496 https://github.com/ARMmbed/mbedtls/issues/396 */
497 if(x509_crt_parse_der(p, peercert->raw.p, peercert->raw.len)) {
498 failf(data, "Failed copying peer certificate");
499 x509_crt_free(p);
500 free(p);
501 return CURLE_SSL_PINNEDPUBKEYNOTMATCH;
502 }
503
504 size = pk_write_pubkey_der(&p->pk, pubkey, PUB_DER_MAX_BYTES);
505
506 if(size <= 0) {
507 failf(data, "Failed copying public key from peer certificate");
508 x509_crt_free(p);
509 free(p);
510 return CURLE_SSL_PINNEDPUBKEYNOTMATCH;
511 }
512
513 /* pk_write_pubkey_der writes data at the end of the buffer. */
514 result = Curl_pin_peer_pubkey(data,
515 data->set.str[STRING_SSL_PINNEDPUBLICKEY],
516 &pubkey[PUB_DER_MAX_BYTES - size], size);
517 if(result) {
518 x509_crt_free(p);
519 free(p);
520 return result;
521 }
522
523 x509_crt_free(p);
524 free(p);
525 }
526
527 #ifdef HAS_ALPN
528 if(conn->bits.tls_enable_alpn) {
529 const char *next_protocol = ssl_get_alpn_protocol(&connssl->ssl);
530
531 if(next_protocol != NULL) {
532 infof(data, "ALPN, server accepted to use %s\n", next_protocol);
533
534 #ifdef USE_NGHTTP2
535 if(!strncmp(next_protocol, NGHTTP2_PROTO_VERSION_ID,
536 NGHTTP2_PROTO_VERSION_ID_LEN)) {
537 conn->negnpn = CURL_HTTP_VERSION_2;
538 }
539 else
540 #endif
541 if(!strncmp(next_protocol, ALPN_HTTP_1_1, ALPN_HTTP_1_1_LENGTH)) {
542 conn->negnpn = CURL_HTTP_VERSION_1_1;
543 }
544 }
545 else
546 infof(data, "ALPN, server did not agree to a protocol\n");
547 }
548 #endif
549
550 connssl->connecting_state = ssl_connect_3;
551 infof(data, "SSL connected\n");
552
553 return CURLE_OK;
554 }
555
556 static CURLcode
polarssl_connect_step3(struct connectdata * conn,int sockindex)557 polarssl_connect_step3(struct connectdata *conn,
558 int sockindex)
559 {
560 CURLcode retcode = CURLE_OK;
561 struct ssl_connect_data *connssl = &conn->ssl[sockindex];
562 struct Curl_easy *data = conn->data;
563
564 DEBUGASSERT(ssl_connect_3 == connssl->connecting_state);
565
566 if(conn->ssl_config.sessionid) {
567 int ret;
568 ssl_session *our_ssl_sessionid;
569 void *old_ssl_sessionid = NULL;
570
571 our_ssl_sessionid = malloc(sizeof(ssl_session));
572 if(!our_ssl_sessionid)
573 return CURLE_OUT_OF_MEMORY;
574
575 ssl_session_init(our_ssl_sessionid);
576
577 ret = ssl_get_session(&connssl->ssl, our_ssl_sessionid);
578 if(ret) {
579 failf(data, "ssl_get_session returned -0x%x", -ret);
580 return CURLE_SSL_CONNECT_ERROR;
581 }
582
583 /* If there's already a matching session in the cache, delete it */
584 Curl_ssl_sessionid_lock(conn);
585 if(!Curl_ssl_getsessionid(conn, &old_ssl_sessionid, NULL))
586 Curl_ssl_delsessionid(conn, old_ssl_sessionid);
587
588 retcode = Curl_ssl_addsessionid(conn, our_ssl_sessionid, 0);
589 Curl_ssl_sessionid_unlock(conn);
590 if(retcode) {
591 free(our_ssl_sessionid);
592 failf(data, "failed to store ssl session");
593 return retcode;
594 }
595 }
596
597 connssl->connecting_state = ssl_connect_done;
598
599 return CURLE_OK;
600 }
601
polarssl_send(struct connectdata * conn,int sockindex,const void * mem,size_t len,CURLcode * curlcode)602 static ssize_t polarssl_send(struct connectdata *conn,
603 int sockindex,
604 const void *mem,
605 size_t len,
606 CURLcode *curlcode)
607 {
608 int ret = -1;
609
610 ret = ssl_write(&conn->ssl[sockindex].ssl,
611 (unsigned char *)mem, len);
612
613 if(ret < 0) {
614 *curlcode = (ret == POLARSSL_ERR_NET_WANT_WRITE) ?
615 CURLE_AGAIN : CURLE_SEND_ERROR;
616 ret = -1;
617 }
618
619 return ret;
620 }
621
Curl_polarssl_close(struct connectdata * conn,int sockindex)622 void Curl_polarssl_close(struct connectdata *conn, int sockindex)
623 {
624 rsa_free(&conn->ssl[sockindex].rsa);
625 x509_crt_free(&conn->ssl[sockindex].clicert);
626 x509_crt_free(&conn->ssl[sockindex].cacert);
627 x509_crl_free(&conn->ssl[sockindex].crl);
628 ssl_free(&conn->ssl[sockindex].ssl);
629 }
630
polarssl_recv(struct connectdata * conn,int num,char * buf,size_t buffersize,CURLcode * curlcode)631 static ssize_t polarssl_recv(struct connectdata *conn,
632 int num,
633 char *buf,
634 size_t buffersize,
635 CURLcode *curlcode)
636 {
637 int ret = -1;
638 ssize_t len = -1;
639
640 memset(buf, 0, buffersize);
641 ret = ssl_read(&conn->ssl[num].ssl, (unsigned char *)buf, buffersize);
642
643 if(ret <= 0) {
644 if(ret == POLARSSL_ERR_SSL_PEER_CLOSE_NOTIFY)
645 return 0;
646
647 *curlcode = (ret == POLARSSL_ERR_NET_WANT_READ) ?
648 CURLE_AGAIN : CURLE_RECV_ERROR;
649 return -1;
650 }
651
652 len = ret;
653
654 return len;
655 }
656
Curl_polarssl_session_free(void * ptr)657 void Curl_polarssl_session_free(void *ptr)
658 {
659 ssl_session_free(ptr);
660 free(ptr);
661 }
662
663 /* 1.3.10 was the first rebranded version. All new releases (in 1.3 branch and
664 higher) will be mbed TLS branded.. */
665
Curl_polarssl_version(char * buffer,size_t size)666 size_t Curl_polarssl_version(char *buffer, size_t size)
667 {
668 unsigned int version = version_get_number();
669 return snprintf(buffer, size, "%s/%d.%d.%d",
670 version >= 0x01030A00?"mbedTLS":"PolarSSL",
671 version>>24, (version>>16)&0xff, (version>>8)&0xff);
672 }
673
674 static CURLcode
polarssl_connect_common(struct connectdata * conn,int sockindex,bool nonblocking,bool * done)675 polarssl_connect_common(struct connectdata *conn,
676 int sockindex,
677 bool nonblocking,
678 bool *done)
679 {
680 CURLcode result;
681 struct Curl_easy *data = conn->data;
682 struct ssl_connect_data *connssl = &conn->ssl[sockindex];
683 curl_socket_t sockfd = conn->sock[sockindex];
684 long timeout_ms;
685 int what;
686
687 /* check if the connection has already been established */
688 if(ssl_connection_complete == connssl->state) {
689 *done = TRUE;
690 return CURLE_OK;
691 }
692
693 if(ssl_connect_1 == connssl->connecting_state) {
694 /* Find out how much more time we're allowed */
695 timeout_ms = Curl_timeleft(data, NULL, TRUE);
696
697 if(timeout_ms < 0) {
698 /* no need to continue if time already is up */
699 failf(data, "SSL connection timeout");
700 return CURLE_OPERATION_TIMEDOUT;
701 }
702
703 result = polarssl_connect_step1(conn, sockindex);
704 if(result)
705 return result;
706 }
707
708 while(ssl_connect_2 == connssl->connecting_state ||
709 ssl_connect_2_reading == connssl->connecting_state ||
710 ssl_connect_2_writing == connssl->connecting_state) {
711
712 /* check allowed time left */
713 timeout_ms = Curl_timeleft(data, NULL, TRUE);
714
715 if(timeout_ms < 0) {
716 /* no need to continue if time already is up */
717 failf(data, "SSL connection timeout");
718 return CURLE_OPERATION_TIMEDOUT;
719 }
720
721 /* if ssl is expecting something, check if it's available. */
722 if(connssl->connecting_state == ssl_connect_2_reading ||
723 connssl->connecting_state == ssl_connect_2_writing) {
724
725 curl_socket_t writefd = ssl_connect_2_writing==
726 connssl->connecting_state?sockfd:CURL_SOCKET_BAD;
727 curl_socket_t readfd = ssl_connect_2_reading==
728 connssl->connecting_state?sockfd:CURL_SOCKET_BAD;
729
730 what = Curl_socket_ready(readfd, writefd, nonblocking?0:timeout_ms);
731 if(what < 0) {
732 /* fatal error */
733 failf(data, "select/poll on SSL socket, errno: %d", SOCKERRNO);
734 return CURLE_SSL_CONNECT_ERROR;
735 }
736 else if(0 == what) {
737 if(nonblocking) {
738 *done = FALSE;
739 return CURLE_OK;
740 }
741 else {
742 /* timeout */
743 failf(data, "SSL connection timeout");
744 return CURLE_OPERATION_TIMEDOUT;
745 }
746 }
747 /* socket is readable or writable */
748 }
749
750 /* Run transaction, and return to the caller if it failed or if
751 * this connection is part of a multi handle and this loop would
752 * execute again. This permits the owner of a multi handle to
753 * abort a connection attempt before step2 has completed while
754 * ensuring that a client using select() or epoll() will always
755 * have a valid fdset to wait on.
756 */
757 result = polarssl_connect_step2(conn, sockindex);
758 if(result || (nonblocking &&
759 (ssl_connect_2 == connssl->connecting_state ||
760 ssl_connect_2_reading == connssl->connecting_state ||
761 ssl_connect_2_writing == connssl->connecting_state)))
762 return result;
763
764 } /* repeat step2 until all transactions are done. */
765
766 if(ssl_connect_3 == connssl->connecting_state) {
767 result = polarssl_connect_step3(conn, sockindex);
768 if(result)
769 return result;
770 }
771
772 if(ssl_connect_done == connssl->connecting_state) {
773 connssl->state = ssl_connection_complete;
774 conn->recv[sockindex] = polarssl_recv;
775 conn->send[sockindex] = polarssl_send;
776 *done = TRUE;
777 }
778 else
779 *done = FALSE;
780
781 /* Reset our connect state machine */
782 connssl->connecting_state = ssl_connect_1;
783
784 return CURLE_OK;
785 }
786
787 CURLcode
Curl_polarssl_connect_nonblocking(struct connectdata * conn,int sockindex,bool * done)788 Curl_polarssl_connect_nonblocking(struct connectdata *conn,
789 int sockindex,
790 bool *done)
791 {
792 return polarssl_connect_common(conn, sockindex, TRUE, done);
793 }
794
795
796 CURLcode
Curl_polarssl_connect(struct connectdata * conn,int sockindex)797 Curl_polarssl_connect(struct connectdata *conn,
798 int sockindex)
799 {
800 CURLcode result;
801 bool done = FALSE;
802
803 result = polarssl_connect_common(conn, sockindex, FALSE, &done);
804 if(result)
805 return result;
806
807 DEBUGASSERT(done);
808
809 return CURLE_OK;
810 }
811
812 /*
813 * return 0 error initializing SSL
814 * return 1 SSL initialized successfully
815 */
Curl_polarssl_init(void)816 int Curl_polarssl_init(void)
817 {
818 return Curl_polarsslthreadlock_thread_setup();
819 }
820
Curl_polarssl_cleanup(void)821 void Curl_polarssl_cleanup(void)
822 {
823 (void)Curl_polarsslthreadlock_thread_cleanup();
824 }
825
826 #endif /* USE_POLARSSL */
827