source: asp3_tinet_ecnl_arm/trunk/curl-7.57.0/lib/vtls/polarssl.c@ 352

Last change on this file since 352 was 352, checked in by coas-nagasima, 6 years ago

arm向けASP3版ECNLを追加
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1/***************************************************************************
2 * _ _ ____ _
3 * Project ___| | | | _ \| |
4 * / __| | | | |_) | |
5 * | (__| |_| | _ <| |___
6 * \___|\___/|_| \_\_____|
7 *
8 * Copyright (C) 2012 - 2017, 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#include <polarssl/net.h>
34#include <polarssl/ssl.h>
35#include <polarssl/certs.h>
36#include <polarssl/x509.h>
37#include <polarssl/version.h>
38#include <polarssl/sha256.h>
39
40#if POLARSSL_VERSION_NUMBER < 0x01030000
41#error too old PolarSSL
42#endif
43
44#include <polarssl/error.h>
45#include <polarssl/entropy.h>
46#include <polarssl/ctr_drbg.h>
47
48#include "urldata.h"
49#include "sendf.h"
50#include "inet_pton.h"
51#include "polarssl.h"
52#include "vtls.h"
53#include "parsedate.h"
54#include "connect.h" /* for the connect timeout */
55#include "select.h"
56#include "strcase.h"
57#include "polarssl_threadlock.h"
58#include "curl_printf.h"
59#include "curl_memory.h"
60/* The last #include file should be: */
61#include "memdebug.h"
62
63/* See https://tls.mbed.org/discussions/generic/
64 howto-determine-exact-buffer-len-for-mbedtls_pk_write_pubkey_der
65*/
66#define RSA_PUB_DER_MAX_BYTES (38 + 2 * POLARSSL_MPI_MAX_SIZE)
67#define ECP_PUB_DER_MAX_BYTES (30 + 2 * POLARSSL_ECP_MAX_BYTES)
68
69#define PUB_DER_MAX_BYTES (RSA_PUB_DER_MAX_BYTES > ECP_PUB_DER_MAX_BYTES ? \
70 RSA_PUB_DER_MAX_BYTES : ECP_PUB_DER_MAX_BYTES)
71
72struct ssl_backend_data {
73 ctr_drbg_context ctr_drbg;
74 entropy_context entropy;
75 ssl_context ssl;
76 int server_fd;
77 x509_crt cacert;
78 x509_crt clicert;
79 x509_crl crl;
80 rsa_context rsa;
81};
82
83#define BACKEND connssl->backend
84
85/* apply threading? */
86#if defined(USE_THREADS_POSIX) || defined(USE_THREADS_WIN32)
87#define THREADING_SUPPORT
88#endif
89
90#ifndef POLARSSL_ERROR_C
91#define error_strerror(x,y,z)
92#endif /* POLARSSL_ERROR_C */
93
94
95#if defined(THREADING_SUPPORT)
96static entropy_context entropy;
97
98static int entropy_init_initialized = 0;
99
100/* start of entropy_init_mutex() */
101static void entropy_init_mutex(entropy_context *ctx)
102{
103 /* lock 0 = entropy_init_mutex() */
104 Curl_polarsslthreadlock_lock_function(0);
105 if(entropy_init_initialized == 0) {
106 entropy_init(ctx);
107 entropy_init_initialized = 1;
108 }
109 Curl_polarsslthreadlock_unlock_function(0);
110}
111/* end of entropy_init_mutex() */
112
113/* start of entropy_func_mutex() */
114static int entropy_func_mutex(void *data, unsigned char *output, size_t len)
115{
116 int ret;
117 /* lock 1 = entropy_func_mutex() */
118 Curl_polarsslthreadlock_lock_function(1);
119 ret = entropy_func(data, output, len);
120 Curl_polarsslthreadlock_unlock_function(1);
121
122 return ret;
123}
124/* end of entropy_func_mutex() */
125
126#endif /* THREADING_SUPPORT */
127
128/* Define this to enable lots of debugging for PolarSSL */
129#undef POLARSSL_DEBUG
130
131#ifdef POLARSSL_DEBUG
132static void polarssl_debug(void *context, int level, const char *line)
133{
134 struct Curl_easy *data = NULL;
135
136 if(!context)
137 return;
138
139 data = (struct Curl_easy *)context;
140
141 infof(data, "%s", line);
142 (void) level;
143}
144#else
145#endif
146
147/* ALPN for http2? */
148#ifdef POLARSSL_SSL_ALPN
149# define HAS_ALPN
150#endif
151
152static Curl_recv polarssl_recv;
153static Curl_send polarssl_send;
154
155static CURLcode polarssl_version_from_curl(int *polarver, long ssl_version)
156{
157 switch(ssl_version) {
158 case CURL_SSLVERSION_TLSv1_0:
159 *polarver = SSL_MINOR_VERSION_1;
160 return CURLE_OK;
161 case CURL_SSLVERSION_TLSv1_1:
162 *polarver = SSL_MINOR_VERSION_2;
163 return CURLE_OK;
164 case CURL_SSLVERSION_TLSv1_2:
165 *polarver = SSL_MINOR_VERSION_3;
166 return CURLE_OK;
167 case CURL_SSLVERSION_TLSv1_3:
168 break;
169 }
170 return CURLE_SSL_CONNECT_ERROR;
171}
172
173static CURLcode
174set_ssl_version_min_max(struct connectdata *conn, int sockindex)
175{
176 struct Curl_easy *data = conn->data;
177 struct ssl_connect_data* connssl = &conn->ssl[sockindex];
178 long ssl_version = SSL_CONN_CONFIG(version);
179 long ssl_version_max = SSL_CONN_CONFIG(version_max);
180 int ssl_min_ver = SSL_MINOR_VERSION_1;
181 int ssl_max_ver = SSL_MINOR_VERSION_1;
182 CURLcode result = CURLE_OK;
183
184 switch(ssl_version) {
185 case CURL_SSLVERSION_DEFAULT:
186 case CURL_SSLVERSION_TLSv1:
187 ssl_version = CURL_SSLVERSION_TLSv1_0;
188 ssl_version_max = CURL_SSLVERSION_MAX_TLSv1_2;
189 break;
190 }
191
192 switch(ssl_version_max) {
193 case CURL_SSLVERSION_MAX_NONE:
194 ssl_version_max = ssl_version << 16;
195 break;
196 case CURL_SSLVERSION_MAX_DEFAULT:
197 ssl_version_max = CURL_SSLVERSION_MAX_TLSv1_2;
198 break;
199 }
200
201 result = polarssl_version_from_curl(&ssl_min_ver, ssl_version);
202 if(result) {
203 failf(data, "unsupported min version passed via CURLOPT_SSLVERSION");
204 return result;
205 }
206 result = polarssl_version_from_curl(&ssl_max_ver, ssl_version_max >> 16);
207 if(result) {
208 failf(data, "unsupported max version passed via CURLOPT_SSLVERSION");
209 return result;
210 }
211
212 ssl_set_min_version(&BACKEND->ssl, SSL_MAJOR_VERSION_3, ssl_min_ver);
213 ssl_set_max_version(&BACKEND->ssl, SSL_MAJOR_VERSION_3, ssl_max_ver);
214
215 return result;
216}
217
218static CURLcode
219polarssl_connect_step1(struct connectdata *conn,
220 int sockindex)
221{
222 struct Curl_easy *data = conn->data;
223 struct ssl_connect_data* connssl = &conn->ssl[sockindex];
224 const char *capath = SSL_CONN_CONFIG(CApath);
225 const char * const hostname = SSL_IS_PROXY() ? conn->http_proxy.host.name :
226 conn->host.name;
227 const long int port = SSL_IS_PROXY() ? conn->port : conn->remote_port;
228 int ret = -1;
229 char errorbuf[128];
230 errorbuf[0] = 0;
231
232 /* PolarSSL only supports SSLv3 and TLSv1 */
233 if(SSL_CONN_CONFIG(version) == CURL_SSLVERSION_SSLv2) {
234 failf(data, "PolarSSL does not support SSLv2");
235 return CURLE_SSL_CONNECT_ERROR;
236 }
237
238#ifdef THREADING_SUPPORT
239 entropy_init_mutex(&entropy);
240
241 if((ret = ctr_drbg_init(&BACKEND->ctr_drbg, entropy_func_mutex, &entropy,
242 NULL, 0)) != 0) {
243 error_strerror(ret, errorbuf, sizeof(errorbuf));
244 failf(data, "Failed - PolarSSL: ctr_drbg_init returned (-0x%04X) %s\n",
245 -ret, errorbuf);
246 }
247#else
248 entropy_init(&BACKEND->entropy);
249
250 if((ret = ctr_drbg_init(&BACKEND->ctr_drbg, entropy_func, &BACKEND->entropy,
251 NULL, 0)) != 0) {
252 error_strerror(ret, errorbuf, sizeof(errorbuf));
253 failf(data, "Failed - PolarSSL: ctr_drbg_init returned (-0x%04X) %s\n",
254 -ret, errorbuf);
255 }
256#endif /* THREADING_SUPPORT */
257
258 /* Load the trusted CA */
259 memset(&BACKEND->cacert, 0, sizeof(x509_crt));
260
261 if(SSL_CONN_CONFIG(CAfile)) {
262 ret = x509_crt_parse_file(&BACKEND->cacert,
263 SSL_CONN_CONFIG(CAfile));
264
265 if(ret<0) {
266 error_strerror(ret, errorbuf, sizeof(errorbuf));
267 failf(data, "Error reading ca cert file %s - PolarSSL: (-0x%04X) %s",
268 SSL_CONN_CONFIG(CAfile), -ret, errorbuf);
269
270 if(SSL_CONN_CONFIG(verifypeer))
271 return CURLE_SSL_CACERT_BADFILE;
272 }
273 }
274
275 if(capath) {
276 ret = x509_crt_parse_path(&BACKEND->cacert, capath);
277
278 if(ret<0) {
279 error_strerror(ret, errorbuf, sizeof(errorbuf));
280 failf(data, "Error reading ca cert path %s - PolarSSL: (-0x%04X) %s",
281 capath, -ret, errorbuf);
282
283 if(SSL_CONN_CONFIG(verifypeer))
284 return CURLE_SSL_CACERT_BADFILE;
285 }
286 }
287
288 /* Load the client certificate */
289 memset(&BACKEND->clicert, 0, sizeof(x509_crt));
290
291 if(SSL_SET_OPTION(cert)) {
292 ret = x509_crt_parse_file(&BACKEND->clicert,
293 SSL_SET_OPTION(cert));
294
295 if(ret) {
296 error_strerror(ret, errorbuf, sizeof(errorbuf));
297 failf(data, "Error reading client cert file %s - PolarSSL: (-0x%04X) %s",
298 SSL_SET_OPTION(cert), -ret, errorbuf);
299
300 return CURLE_SSL_CERTPROBLEM;
301 }
302 }
303
304 /* Load the client private key */
305 if(SSL_SET_OPTION(key)) {
306 pk_context pk;
307 pk_init(&pk);
308 ret = pk_parse_keyfile(&pk, SSL_SET_OPTION(key),
309 SSL_SET_OPTION(key_passwd));
310 if(ret == 0 && !pk_can_do(&pk, POLARSSL_PK_RSA))
311 ret = POLARSSL_ERR_PK_TYPE_MISMATCH;
312 if(ret == 0)
313 rsa_copy(&BACKEND->rsa, pk_rsa(pk));
314 else
315 rsa_free(&BACKEND->rsa);
316 pk_free(&pk);
317
318 if(ret) {
319 error_strerror(ret, errorbuf, sizeof(errorbuf));
320 failf(data, "Error reading private key %s - PolarSSL: (-0x%04X) %s",
321 SSL_SET_OPTION(key), -ret, errorbuf);
322
323 return CURLE_SSL_CERTPROBLEM;
324 }
325 }
326
327 /* Load the CRL */
328 memset(&BACKEND->crl, 0, sizeof(x509_crl));
329
330 if(SSL_SET_OPTION(CRLfile)) {
331 ret = x509_crl_parse_file(&BACKEND->crl,
332 SSL_SET_OPTION(CRLfile));
333
334 if(ret) {
335 error_strerror(ret, errorbuf, sizeof(errorbuf));
336 failf(data, "Error reading CRL file %s - PolarSSL: (-0x%04X) %s",
337 SSL_SET_OPTION(CRLfile), -ret, errorbuf);
338
339 return CURLE_SSL_CRL_BADFILE;
340 }
341 }
342
343 infof(data, "PolarSSL: Connecting to %s:%d\n", hostname, port);
344
345 if(ssl_init(&BACKEND->ssl)) {
346 failf(data, "PolarSSL: ssl_init failed");
347 return CURLE_SSL_CONNECT_ERROR;
348 }
349
350 switch(SSL_CONN_CONFIG(version)) {
351 case CURL_SSLVERSION_DEFAULT:
352 case CURL_SSLVERSION_TLSv1:
353 ssl_set_min_version(&BACKEND->ssl, SSL_MAJOR_VERSION_3,
354 SSL_MINOR_VERSION_1);
355 break;
356 case CURL_SSLVERSION_SSLv3:
357 ssl_set_min_version(&BACKEND->ssl, SSL_MAJOR_VERSION_3,
358 SSL_MINOR_VERSION_0);
359 ssl_set_max_version(&BACKEND->ssl, SSL_MAJOR_VERSION_3,
360 SSL_MINOR_VERSION_0);
361 infof(data, "PolarSSL: Forced min. SSL Version to be SSLv3\n");
362 break;
363 case CURL_SSLVERSION_TLSv1_0:
364 case CURL_SSLVERSION_TLSv1_1:
365 case CURL_SSLVERSION_TLSv1_2:
366 case CURL_SSLVERSION_TLSv1_3:
367 {
368 CURLcode result = set_ssl_version_min_max(conn, sockindex);
369 if(result != CURLE_OK)
370 return result;
371 break;
372 }
373 default:
374 failf(data, "Unrecognized parameter passed via CURLOPT_SSLVERSION");
375 return CURLE_SSL_CONNECT_ERROR;
376 }
377
378 ssl_set_endpoint(&BACKEND->ssl, SSL_IS_CLIENT);
379 ssl_set_authmode(&BACKEND->ssl, SSL_VERIFY_OPTIONAL);
380
381 ssl_set_rng(&BACKEND->ssl, ctr_drbg_random,
382 &BACKEND->ctr_drbg);
383 ssl_set_bio(&BACKEND->ssl,
384 net_recv, &conn->sock[sockindex],
385 net_send, &conn->sock[sockindex]);
386
387 ssl_set_ciphersuites(&BACKEND->ssl, ssl_list_ciphersuites());
388
389 /* Check if there's a cached ID we can/should use here! */
390 if(SSL_SET_OPTION(primary.sessionid)) {
391 void *old_session = NULL;
392
393 Curl_ssl_sessionid_lock(conn);
394 if(!Curl_ssl_getsessionid(conn, &old_session, NULL, sockindex)) {
395 ret = ssl_set_session(&BACKEND->ssl, old_session);
396 if(ret) {
397 Curl_ssl_sessionid_unlock(conn);
398 failf(data, "ssl_set_session returned -0x%x", -ret);
399 return CURLE_SSL_CONNECT_ERROR;
400 }
401 infof(data, "PolarSSL re-using session\n");
402 }
403 Curl_ssl_sessionid_unlock(conn);
404 }
405
406 ssl_set_ca_chain(&BACKEND->ssl,
407 &BACKEND->cacert,
408 &BACKEND->crl,
409 hostname);
410
411 ssl_set_own_cert_rsa(&BACKEND->ssl,
412 &BACKEND->clicert, &BACKEND->rsa);
413
414 if(ssl_set_hostname(&BACKEND->ssl, hostname)) {
415 /* ssl_set_hostname() sets the name to use in CN/SAN checks *and* the name
416 to set in the SNI extension. So even if curl connects to a host
417 specified as an IP address, this function must be used. */
418 failf(data, "couldn't set hostname in PolarSSL");
419 return CURLE_SSL_CONNECT_ERROR;
420 }
421
422#ifdef HAS_ALPN
423 if(conn->bits.tls_enable_alpn) {
424 static const char *protocols[3];
425 int cur = 0;
426
427#ifdef USE_NGHTTP2
428 if(data->set.httpversion >= CURL_HTTP_VERSION_2) {
429 protocols[cur++] = NGHTTP2_PROTO_VERSION_ID;
430 infof(data, "ALPN, offering %s\n", NGHTTP2_PROTO_VERSION_ID);
431 }
432#endif
433
434 protocols[cur++] = ALPN_HTTP_1_1;
435 infof(data, "ALPN, offering %s\n", ALPN_HTTP_1_1);
436
437 protocols[cur] = NULL;
438
439 ssl_set_alpn_protocols(&BACKEND->ssl, protocols);
440 }
441#endif
442
443#ifdef POLARSSL_DEBUG
444 ssl_set_dbg(&BACKEND->ssl, polarssl_debug, data);
445#endif
446
447 connssl->connecting_state = ssl_connect_2;
448
449 return CURLE_OK;
450}
451
452static CURLcode
453polarssl_connect_step2(struct connectdata *conn,
454 int sockindex)
455{
456 int ret;
457 struct Curl_easy *data = conn->data;
458 struct ssl_connect_data* connssl = &conn->ssl[sockindex];
459 char buffer[1024];
460 const char * const pinnedpubkey = SSL_IS_PROXY() ?
461 data->set.str[STRING_SSL_PINNEDPUBLICKEY_PROXY] :
462 data->set.str[STRING_SSL_PINNEDPUBLICKEY_ORIG];
463
464
465 char errorbuf[128];
466 errorbuf[0] = 0;
467
468 conn->recv[sockindex] = polarssl_recv;
469 conn->send[sockindex] = polarssl_send;
470
471 ret = ssl_handshake(&BACKEND->ssl);
472
473 switch(ret) {
474 case 0:
475 break;
476
477 case POLARSSL_ERR_NET_WANT_READ:
478 connssl->connecting_state = ssl_connect_2_reading;
479 return CURLE_OK;
480
481 case POLARSSL_ERR_NET_WANT_WRITE:
482 connssl->connecting_state = ssl_connect_2_writing;
483 return CURLE_OK;
484
485 default:
486 error_strerror(ret, errorbuf, sizeof(errorbuf));
487 failf(data, "ssl_handshake returned - PolarSSL: (-0x%04X) %s",
488 -ret, errorbuf);
489 return CURLE_SSL_CONNECT_ERROR;
490 }
491
492 infof(data, "PolarSSL: Handshake complete, cipher is %s\n",
493 ssl_get_ciphersuite(&BACKEND->ssl) );
494
495 ret = ssl_get_verify_result(&BACKEND->ssl);
496
497 if(ret && SSL_CONN_CONFIG(verifypeer)) {
498 if(ret & BADCERT_EXPIRED)
499 failf(data, "Cert verify failed: BADCERT_EXPIRED");
500
501 if(ret & BADCERT_REVOKED) {
502 failf(data, "Cert verify failed: BADCERT_REVOKED");
503 return CURLE_SSL_CACERT;
504 }
505
506 if(ret & BADCERT_CN_MISMATCH)
507 failf(data, "Cert verify failed: BADCERT_CN_MISMATCH");
508
509 if(ret & BADCERT_NOT_TRUSTED)
510 failf(data, "Cert verify failed: BADCERT_NOT_TRUSTED");
511
512 return CURLE_PEER_FAILED_VERIFICATION;
513 }
514
515 if(ssl_get_peer_cert(&(BACKEND->ssl))) {
516 /* If the session was resumed, there will be no peer certs */
517 memset(buffer, 0, sizeof(buffer));
518
519 if(x509_crt_info(buffer, sizeof(buffer), (char *)"* ",
520 ssl_get_peer_cert(&(BACKEND->ssl))) != -1)
521 infof(data, "Dumping cert info:\n%s\n", buffer);
522 }
523
524 /* adapted from mbedtls.c */
525 if(pinnedpubkey) {
526 int size;
527 CURLcode result;
528 x509_crt *p;
529 unsigned char pubkey[PUB_DER_MAX_BYTES];
530 const x509_crt *peercert;
531
532 peercert = ssl_get_peer_cert(&BACKEND->ssl);
533
534 if(!peercert || !peercert->raw.p || !peercert->raw.len) {
535 failf(data, "Failed due to missing peer certificate");
536 return CURLE_SSL_PINNEDPUBKEYNOTMATCH;
537 }
538
539 p = calloc(1, sizeof(*p));
540
541 if(!p)
542 return CURLE_OUT_OF_MEMORY;
543
544 x509_crt_init(p);
545
546 /* Make a copy of our const peercert because pk_write_pubkey_der
547 needs a non-const key, for now.
548 https://github.com/ARMmbed/mbedtls/issues/396 */
549 if(x509_crt_parse_der(p, peercert->raw.p, peercert->raw.len)) {
550 failf(data, "Failed copying peer certificate");
551 x509_crt_free(p);
552 free(p);
553 return CURLE_SSL_PINNEDPUBKEYNOTMATCH;
554 }
555
556 size = pk_write_pubkey_der(&p->pk, pubkey, PUB_DER_MAX_BYTES);
557
558 if(size <= 0) {
559 failf(data, "Failed copying public key from peer certificate");
560 x509_crt_free(p);
561 free(p);
562 return CURLE_SSL_PINNEDPUBKEYNOTMATCH;
563 }
564
565 /* pk_write_pubkey_der writes data at the end of the buffer. */
566 result = Curl_pin_peer_pubkey(data,
567 pinnedpubkey,
568 &pubkey[PUB_DER_MAX_BYTES - size], size);
569 if(result) {
570 x509_crt_free(p);
571 free(p);
572 return result;
573 }
574
575 x509_crt_free(p);
576 free(p);
577 }
578
579#ifdef HAS_ALPN
580 if(conn->bits.tls_enable_alpn) {
581 const char *next_protocol = ssl_get_alpn_protocol(&BACKEND->ssl);
582
583 if(next_protocol != NULL) {
584 infof(data, "ALPN, server accepted to use %s\n", next_protocol);
585
586#ifdef USE_NGHTTP2
587 if(!strncmp(next_protocol, NGHTTP2_PROTO_VERSION_ID,
588 NGHTTP2_PROTO_VERSION_ID_LEN)) {
589 conn->negnpn = CURL_HTTP_VERSION_2;
590 }
591 else
592#endif
593 if(!strncmp(next_protocol, ALPN_HTTP_1_1, ALPN_HTTP_1_1_LENGTH)) {
594 conn->negnpn = CURL_HTTP_VERSION_1_1;
595 }
596 }
597 else
598 infof(data, "ALPN, server did not agree to a protocol\n");
599 }
600#endif
601
602 connssl->connecting_state = ssl_connect_3;
603 infof(data, "SSL connected\n");
604
605 return CURLE_OK;
606}
607
608static CURLcode
609polarssl_connect_step3(struct connectdata *conn,
610 int sockindex)
611{
612 CURLcode retcode = CURLE_OK;
613 struct ssl_connect_data *connssl = &conn->ssl[sockindex];
614 struct Curl_easy *data = conn->data;
615
616 DEBUGASSERT(ssl_connect_3 == connssl->connecting_state);
617
618 if(SSL_SET_OPTION(primary.sessionid)) {
619 int ret;
620 ssl_session *our_ssl_sessionid;
621 void *old_ssl_sessionid = NULL;
622
623 our_ssl_sessionid = malloc(sizeof(ssl_session));
624 if(!our_ssl_sessionid)
625 return CURLE_OUT_OF_MEMORY;
626
627 memset(our_ssl_sessionid, 0, sizeof(ssl_session));
628
629 ret = ssl_get_session(&BACKEND->ssl, our_ssl_sessionid);
630 if(ret) {
631 failf(data, "ssl_get_session returned -0x%x", -ret);
632 return CURLE_SSL_CONNECT_ERROR;
633 }
634
635 /* If there's already a matching session in the cache, delete it */
636 Curl_ssl_sessionid_lock(conn);
637 if(!Curl_ssl_getsessionid(conn, &old_ssl_sessionid, NULL, sockindex))
638 Curl_ssl_delsessionid(conn, old_ssl_sessionid);
639
640 retcode = Curl_ssl_addsessionid(conn, our_ssl_sessionid, 0, sockindex);
641 Curl_ssl_sessionid_unlock(conn);
642 if(retcode) {
643 free(our_ssl_sessionid);
644 failf(data, "failed to store ssl session");
645 return retcode;
646 }
647 }
648
649 connssl->connecting_state = ssl_connect_done;
650
651 return CURLE_OK;
652}
653
654static ssize_t polarssl_send(struct connectdata *conn,
655 int sockindex,
656 const void *mem,
657 size_t len,
658 CURLcode *curlcode)
659{
660 struct ssl_connect_data *connssl = &conn->ssl[sockindex];
661 int ret = -1;
662
663 ret = ssl_write(&BACKEND->ssl,
664 (unsigned char *)mem, len);
665
666 if(ret < 0) {
667 *curlcode = (ret == POLARSSL_ERR_NET_WANT_WRITE) ?
668 CURLE_AGAIN : CURLE_SEND_ERROR;
669 ret = -1;
670 }
671
672 return ret;
673}
674
675static void Curl_polarssl_close(struct connectdata *conn, int sockindex)
676{
677 struct ssl_connect_data *connssl = &conn->ssl[sockindex];
678 rsa_free(&BACKEND->rsa);
679 x509_crt_free(&BACKEND->clicert);
680 x509_crt_free(&BACKEND->cacert);
681 x509_crl_free(&BACKEND->crl);
682 ssl_free(&BACKEND->ssl);
683}
684
685static ssize_t polarssl_recv(struct connectdata *conn,
686 int num,
687 char *buf,
688 size_t buffersize,
689 CURLcode *curlcode)
690{
691 struct ssl_connect_data *connssl = &conn->ssl[num];
692 int ret = -1;
693 ssize_t len = -1;
694
695 memset(buf, 0, buffersize);
696 ret = ssl_read(&BACKEND->ssl, (unsigned char *)buf, buffersize);
697
698 if(ret <= 0) {
699 if(ret == POLARSSL_ERR_SSL_PEER_CLOSE_NOTIFY)
700 return 0;
701
702 *curlcode = (ret == POLARSSL_ERR_NET_WANT_READ) ?
703 CURLE_AGAIN : CURLE_RECV_ERROR;
704 return -1;
705 }
706
707 len = ret;
708
709 return len;
710}
711
712static void Curl_polarssl_session_free(void *ptr)
713{
714 ssl_session_free(ptr);
715 free(ptr);
716}
717
718/* 1.3.10 was the first rebranded version. All new releases (in 1.3 branch and
719 higher) will be mbed TLS branded.. */
720
721static size_t Curl_polarssl_version(char *buffer, size_t size)
722{
723 unsigned int version = version_get_number();
724 return snprintf(buffer, size, "%s/%d.%d.%d",
725 version >= 0x01030A00?"mbedTLS":"PolarSSL",
726 version>>24, (version>>16)&0xff, (version>>8)&0xff);
727}
728
729static CURLcode
730polarssl_connect_common(struct connectdata *conn,
731 int sockindex,
732 bool nonblocking,
733 bool *done)
734{
735 CURLcode result;
736 struct Curl_easy *data = conn->data;
737 struct ssl_connect_data *connssl = &conn->ssl[sockindex];
738 curl_socket_t sockfd = conn->sock[sockindex];
739 long timeout_ms;
740 int what;
741
742 /* check if the connection has already been established */
743 if(ssl_connection_complete == connssl->state) {
744 *done = TRUE;
745 return CURLE_OK;
746 }
747
748 if(ssl_connect_1 == connssl->connecting_state) {
749 /* Find out how much more time we're allowed */
750 timeout_ms = Curl_timeleft(data, NULL, TRUE);
751
752 if(timeout_ms < 0) {
753 /* no need to continue if time already is up */
754 failf(data, "SSL connection timeout");
755 return CURLE_OPERATION_TIMEDOUT;
756 }
757
758 result = polarssl_connect_step1(conn, sockindex);
759 if(result)
760 return result;
761 }
762
763 while(ssl_connect_2 == connssl->connecting_state ||
764 ssl_connect_2_reading == connssl->connecting_state ||
765 ssl_connect_2_writing == connssl->connecting_state) {
766
767 /* check allowed time left */
768 timeout_ms = Curl_timeleft(data, NULL, TRUE);
769
770 if(timeout_ms < 0) {
771 /* no need to continue if time already is up */
772 failf(data, "SSL connection timeout");
773 return CURLE_OPERATION_TIMEDOUT;
774 }
775
776 /* if ssl is expecting something, check if it's available. */
777 if(connssl->connecting_state == ssl_connect_2_reading ||
778 connssl->connecting_state == ssl_connect_2_writing) {
779
780 curl_socket_t writefd = ssl_connect_2_writing ==
781 connssl->connecting_state?sockfd:CURL_SOCKET_BAD;
782 curl_socket_t readfd = ssl_connect_2_reading ==
783 connssl->connecting_state?sockfd:CURL_SOCKET_BAD;
784
785 what = Curl_socket_check(readfd, CURL_SOCKET_BAD, writefd,
786 nonblocking?0:timeout_ms);
787 if(what < 0) {
788 /* fatal error */
789 failf(data, "select/poll on SSL socket, errno: %d", SOCKERRNO);
790 return CURLE_SSL_CONNECT_ERROR;
791 }
792 else if(0 == what) {
793 if(nonblocking) {
794 *done = FALSE;
795 return CURLE_OK;
796 }
797 else {
798 /* timeout */
799 failf(data, "SSL connection timeout");
800 return CURLE_OPERATION_TIMEDOUT;
801 }
802 }
803 /* socket is readable or writable */
804 }
805
806 /* Run transaction, and return to the caller if it failed or if
807 * this connection is part of a multi handle and this loop would
808 * execute again. This permits the owner of a multi handle to
809 * abort a connection attempt before step2 has completed while
810 * ensuring that a client using select() or epoll() will always
811 * have a valid fdset to wait on.
812 */
813 result = polarssl_connect_step2(conn, sockindex);
814 if(result || (nonblocking &&
815 (ssl_connect_2 == connssl->connecting_state ||
816 ssl_connect_2_reading == connssl->connecting_state ||
817 ssl_connect_2_writing == connssl->connecting_state)))
818 return result;
819
820 } /* repeat step2 until all transactions are done. */
821
822 if(ssl_connect_3 == connssl->connecting_state) {
823 result = polarssl_connect_step3(conn, sockindex);
824 if(result)
825 return result;
826 }
827
828 if(ssl_connect_done == connssl->connecting_state) {
829 connssl->state = ssl_connection_complete;
830 conn->recv[sockindex] = polarssl_recv;
831 conn->send[sockindex] = polarssl_send;
832 *done = TRUE;
833 }
834 else
835 *done = FALSE;
836
837 /* Reset our connect state machine */
838 connssl->connecting_state = ssl_connect_1;
839
840 return CURLE_OK;
841}
842
843static CURLcode Curl_polarssl_connect_nonblocking(struct connectdata *conn,
844 int sockindex, bool *done)
845{
846 return polarssl_connect_common(conn, sockindex, TRUE, done);
847}
848
849
850static CURLcode Curl_polarssl_connect(struct connectdata *conn, int sockindex)
851{
852 CURLcode result;
853 bool done = FALSE;
854
855 result = polarssl_connect_common(conn, sockindex, FALSE, &done);
856 if(result)
857 return result;
858
859 DEBUGASSERT(done);
860
861 return CURLE_OK;
862}
863
864/*
865 * return 0 error initializing SSL
866 * return 1 SSL initialized successfully
867 */
868static int Curl_polarssl_init(void)
869{
870 return Curl_polarsslthreadlock_thread_setup();
871}
872
873static void Curl_polarssl_cleanup(void)
874{
875 (void)Curl_polarsslthreadlock_thread_cleanup();
876}
877
878static bool Curl_polarssl_data_pending(const struct connectdata *conn,
879 int sockindex)
880{
881 const struct ssl_connect_data *connssl = &conn->ssl[sockindex];
882 return ssl_get_bytes_avail(&BACKEND->ssl) != 0;
883}
884
885static void Curl_polarssl_sha256sum(const unsigned char *input,
886 size_t inputlen,
887 unsigned char *sha256sum,
888 size_t sha256len UNUSED_PARAM)
889{
890 (void)sha256len;
891 sha256(input, inputlen, sha256sum, 0);
892}
893
894static void *Curl_polarssl_get_internals(struct ssl_connect_data *connssl,
895 CURLINFO info UNUSED_PARAM)
896{
897 (void)info;
898 return &BACKEND->ssl;
899}
900
901const struct Curl_ssl Curl_ssl_polarssl = {
902 { CURLSSLBACKEND_POLARSSL, "polarssl" }, /* info */
903
904 1, /* have_ca_path */
905 0, /* have_certinfo */
906 1, /* have_pinnedpubkey */
907 0, /* have_ssl_ctx */
908 0, /* support_https_proxy */
909
910 sizeof(struct ssl_backend_data),
911
912 Curl_polarssl_init, /* init */
913 Curl_polarssl_cleanup, /* cleanup */
914 Curl_polarssl_version, /* version */
915 Curl_none_check_cxn, /* check_cxn */
916 Curl_none_shutdown, /* shutdown */
917 Curl_polarssl_data_pending, /* data_pending */
918 /* This might cause libcurl to use a weeker random!
919 * TODO: use Polarssl's CTR-DRBG or HMAC-DRBG
920 */
921 Curl_none_random, /* random */
922 Curl_none_cert_status_request, /* cert_status_request */
923 Curl_polarssl_connect, /* connect */
924 Curl_polarssl_connect_nonblocking, /* connect_nonblocking */
925 Curl_polarssl_get_internals, /* get_internals */
926 Curl_polarssl_close, /* close_one */
927 Curl_none_close_all, /* close_all */
928 Curl_polarssl_session_free, /* session_free */
929 Curl_none_set_engine, /* set_engine */
930 Curl_none_set_engine_default, /* set_engine_default */
931 Curl_none_engines_list, /* engines_list */
932 Curl_none_false_start, /* false_start */
933 Curl_none_md5sum, /* md5sum */
934 Curl_polarssl_sha256sum /* sha256sum */
935};
936
937#endif /* USE_POLARSSL */
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