1 | /*************************************************************************** |
2 | * _ _ ____ _ |
3 | * Project ___| | | | _ \| | |
4 | * / __| | | | |_) | | |
5 | * | (__| |_| | _ <| |___ |
6 | * \___|\___/|_| \_\_____| |
7 | * |
8 | * Copyright (C) 2012 - 2019, 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 "multiif.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 | struct ssl_backend_data { |
74 | ctr_drbg_context ctr_drbg; |
75 | entropy_context entropy; |
76 | ssl_context ssl; |
77 | int server_fd; |
78 | x509_crt cacert; |
79 | x509_crt clicert; |
80 | x509_crl crl; |
81 | rsa_context rsa; |
82 | }; |
83 | |
84 | #define BACKEND connssl->backend |
85 | |
86 | /* apply threading? */ |
87 | #if defined(USE_THREADS_POSIX) || defined(USE_THREADS_WIN32) |
88 | #define THREADING_SUPPORT |
89 | #endif |
90 | |
91 | #ifndef POLARSSL_ERROR_C |
92 | #define error_strerror(x,y,z) |
93 | #endif /* POLARSSL_ERROR_C */ |
94 | |
95 | |
96 | #if defined(THREADING_SUPPORT) |
97 | static entropy_context entropy; |
98 | |
99 | static int entropy_init_initialized = 0; |
100 | |
101 | /* start of entropy_init_mutex() */ |
102 | static void entropy_init_mutex(entropy_context *ctx) |
103 | { |
104 | /* lock 0 = entropy_init_mutex() */ |
105 | Curl_polarsslthreadlock_lock_function(0); |
106 | if(entropy_init_initialized == 0) { |
107 | entropy_init(ctx); |
108 | entropy_init_initialized = 1; |
109 | } |
110 | Curl_polarsslthreadlock_unlock_function(0); |
111 | } |
112 | /* end of entropy_init_mutex() */ |
113 | |
114 | /* start of entropy_func_mutex() */ |
115 | static int entropy_func_mutex(void *data, unsigned char *output, size_t len) |
116 | { |
117 | int ret; |
118 | /* lock 1 = entropy_func_mutex() */ |
119 | Curl_polarsslthreadlock_lock_function(1); |
120 | ret = entropy_func(data, output, len); |
121 | Curl_polarsslthreadlock_unlock_function(1); |
122 | |
123 | return ret; |
124 | } |
125 | /* end of entropy_func_mutex() */ |
126 | |
127 | #endif /* THREADING_SUPPORT */ |
128 | |
129 | /* Define this to enable lots of debugging for PolarSSL */ |
130 | #undef POLARSSL_DEBUG |
131 | |
132 | #ifdef POLARSSL_DEBUG |
133 | static void polarssl_debug(void *context, int level, const char *line) |
134 | { |
135 | struct Curl_easy *data = NULL; |
136 | |
137 | if(!context) |
138 | return; |
139 | |
140 | data = (struct Curl_easy *)context; |
141 | |
142 | infof(data, "%s" , line); |
143 | (void) level; |
144 | } |
145 | #else |
146 | #endif |
147 | |
148 | /* ALPN for http2? */ |
149 | #ifdef POLARSSL_SSL_ALPN |
150 | # define HAS_ALPN |
151 | #endif |
152 | |
153 | static Curl_recv polarssl_recv; |
154 | static Curl_send polarssl_send; |
155 | |
156 | static CURLcode polarssl_version_from_curl(int *polarver, long ssl_version) |
157 | { |
158 | switch(ssl_version) { |
159 | case CURL_SSLVERSION_TLSv1_0: |
160 | *polarver = SSL_MINOR_VERSION_1; |
161 | return CURLE_OK; |
162 | case CURL_SSLVERSION_TLSv1_1: |
163 | *polarver = SSL_MINOR_VERSION_2; |
164 | return CURLE_OK; |
165 | case CURL_SSLVERSION_TLSv1_2: |
166 | *polarver = SSL_MINOR_VERSION_3; |
167 | return CURLE_OK; |
168 | case CURL_SSLVERSION_TLSv1_3: |
169 | break; |
170 | } |
171 | return CURLE_SSL_CONNECT_ERROR; |
172 | } |
173 | |
174 | static CURLcode |
175 | set_ssl_version_min_max(struct connectdata *conn, int sockindex) |
176 | { |
177 | struct Curl_easy *data = conn->data; |
178 | struct ssl_connect_data* connssl = &conn->ssl[sockindex]; |
179 | long ssl_version = SSL_CONN_CONFIG(version); |
180 | long ssl_version_max = SSL_CONN_CONFIG(version_max); |
181 | int ssl_min_ver = SSL_MINOR_VERSION_1; |
182 | int ssl_max_ver = SSL_MINOR_VERSION_1; |
183 | CURLcode result = CURLE_OK; |
184 | |
185 | switch(ssl_version) { |
186 | case CURL_SSLVERSION_DEFAULT: |
187 | case CURL_SSLVERSION_TLSv1: |
188 | ssl_version = CURL_SSLVERSION_TLSv1_0; |
189 | break; |
190 | } |
191 | |
192 | switch(ssl_version_max) { |
193 | case CURL_SSLVERSION_MAX_NONE: |
194 | case CURL_SSLVERSION_MAX_DEFAULT: |
195 | ssl_version_max = CURL_SSLVERSION_MAX_TLSv1_2; |
196 | break; |
197 | } |
198 | |
199 | result = polarssl_version_from_curl(&ssl_min_ver, ssl_version); |
200 | if(result) { |
201 | failf(data, "unsupported min version passed via CURLOPT_SSLVERSION" ); |
202 | return result; |
203 | } |
204 | result = polarssl_version_from_curl(&ssl_max_ver, ssl_version_max >> 16); |
205 | if(result) { |
206 | failf(data, "unsupported max version passed via CURLOPT_SSLVERSION" ); |
207 | return result; |
208 | } |
209 | |
210 | ssl_set_min_version(&BACKEND->ssl, SSL_MAJOR_VERSION_3, ssl_min_ver); |
211 | ssl_set_max_version(&BACKEND->ssl, SSL_MAJOR_VERSION_3, ssl_max_ver); |
212 | |
213 | return result; |
214 | } |
215 | |
216 | static CURLcode |
217 | polarssl_connect_step1(struct connectdata *conn, |
218 | int sockindex) |
219 | { |
220 | struct Curl_easy *data = conn->data; |
221 | struct ssl_connect_data* connssl = &conn->ssl[sockindex]; |
222 | const char *capath = SSL_CONN_CONFIG(CApath); |
223 | const char * const hostname = SSL_IS_PROXY() ? conn->http_proxy.host.name : |
224 | conn->host.name; |
225 | const long int port = SSL_IS_PROXY() ? conn->port : conn->remote_port; |
226 | int ret = -1; |
227 | char errorbuf[128]; |
228 | errorbuf[0] = 0; |
229 | |
230 | /* PolarSSL only supports SSLv3 and TLSv1 */ |
231 | if(SSL_CONN_CONFIG(version) == CURL_SSLVERSION_SSLv2) { |
232 | failf(data, "PolarSSL does not support SSLv2" ); |
233 | return CURLE_SSL_CONNECT_ERROR; |
234 | } |
235 | |
236 | #ifdef THREADING_SUPPORT |
237 | entropy_init_mutex(&entropy); |
238 | |
239 | if((ret = ctr_drbg_init(&BACKEND->ctr_drbg, entropy_func_mutex, &entropy, |
240 | NULL, 0)) != 0) { |
241 | error_strerror(ret, errorbuf, sizeof(errorbuf)); |
242 | failf(data, "Failed - PolarSSL: ctr_drbg_init returned (-0x%04X) %s\n" , |
243 | -ret, errorbuf); |
244 | } |
245 | #else |
246 | entropy_init(&BACKEND->entropy); |
247 | |
248 | if((ret = ctr_drbg_init(&BACKEND->ctr_drbg, entropy_func, &BACKEND->entropy, |
249 | NULL, 0)) != 0) { |
250 | error_strerror(ret, errorbuf, sizeof(errorbuf)); |
251 | failf(data, "Failed - PolarSSL: ctr_drbg_init returned (-0x%04X) %s\n" , |
252 | -ret, errorbuf); |
253 | } |
254 | #endif /* THREADING_SUPPORT */ |
255 | |
256 | /* Load the trusted CA */ |
257 | memset(&BACKEND->cacert, 0, sizeof(x509_crt)); |
258 | |
259 | if(SSL_CONN_CONFIG(CAfile)) { |
260 | ret = x509_crt_parse_file(&BACKEND->cacert, |
261 | SSL_CONN_CONFIG(CAfile)); |
262 | |
263 | if(ret<0) { |
264 | error_strerror(ret, errorbuf, sizeof(errorbuf)); |
265 | failf(data, "Error reading ca cert file %s - PolarSSL: (-0x%04X) %s" , |
266 | SSL_CONN_CONFIG(CAfile), -ret, errorbuf); |
267 | |
268 | if(SSL_CONN_CONFIG(verifypeer)) |
269 | return CURLE_SSL_CACERT_BADFILE; |
270 | } |
271 | } |
272 | |
273 | if(capath) { |
274 | ret = x509_crt_parse_path(&BACKEND->cacert, capath); |
275 | |
276 | if(ret<0) { |
277 | error_strerror(ret, errorbuf, sizeof(errorbuf)); |
278 | failf(data, "Error reading ca cert path %s - PolarSSL: (-0x%04X) %s" , |
279 | capath, -ret, errorbuf); |
280 | |
281 | if(SSL_CONN_CONFIG(verifypeer)) |
282 | return CURLE_SSL_CACERT_BADFILE; |
283 | } |
284 | } |
285 | |
286 | /* Load the client certificate */ |
287 | memset(&BACKEND->clicert, 0, sizeof(x509_crt)); |
288 | |
289 | if(SSL_SET_OPTION(cert)) { |
290 | ret = x509_crt_parse_file(&BACKEND->clicert, |
291 | SSL_SET_OPTION(cert)); |
292 | |
293 | if(ret) { |
294 | error_strerror(ret, errorbuf, sizeof(errorbuf)); |
295 | failf(data, "Error reading client cert file %s - PolarSSL: (-0x%04X) %s" , |
296 | SSL_SET_OPTION(cert), -ret, errorbuf); |
297 | |
298 | return CURLE_SSL_CERTPROBLEM; |
299 | } |
300 | } |
301 | |
302 | /* Load the client private key */ |
303 | if(SSL_SET_OPTION(key)) { |
304 | pk_context pk; |
305 | pk_init(&pk); |
306 | ret = pk_parse_keyfile(&pk, SSL_SET_OPTION(key), |
307 | SSL_SET_OPTION(key_passwd)); |
308 | if(ret == 0 && !pk_can_do(&pk, POLARSSL_PK_RSA)) |
309 | ret = POLARSSL_ERR_PK_TYPE_MISMATCH; |
310 | if(ret == 0) |
311 | rsa_copy(&BACKEND->rsa, pk_rsa(pk)); |
312 | else |
313 | rsa_free(&BACKEND->rsa); |
314 | pk_free(&pk); |
315 | |
316 | if(ret) { |
317 | error_strerror(ret, errorbuf, sizeof(errorbuf)); |
318 | failf(data, "Error reading private key %s - PolarSSL: (-0x%04X) %s" , |
319 | SSL_SET_OPTION(key), -ret, errorbuf); |
320 | |
321 | return CURLE_SSL_CERTPROBLEM; |
322 | } |
323 | } |
324 | |
325 | /* Load the CRL */ |
326 | memset(&BACKEND->crl, 0, sizeof(x509_crl)); |
327 | |
328 | if(SSL_SET_OPTION(CRLfile)) { |
329 | ret = x509_crl_parse_file(&BACKEND->crl, |
330 | SSL_SET_OPTION(CRLfile)); |
331 | |
332 | if(ret) { |
333 | error_strerror(ret, errorbuf, sizeof(errorbuf)); |
334 | failf(data, "Error reading CRL file %s - PolarSSL: (-0x%04X) %s" , |
335 | SSL_SET_OPTION(CRLfile), -ret, errorbuf); |
336 | |
337 | return CURLE_SSL_CRL_BADFILE; |
338 | } |
339 | } |
340 | |
341 | infof(data, "PolarSSL: Connecting to %s:%d\n" , hostname, port); |
342 | |
343 | if(ssl_init(&BACKEND->ssl)) { |
344 | failf(data, "PolarSSL: ssl_init failed" ); |
345 | return CURLE_SSL_CONNECT_ERROR; |
346 | } |
347 | |
348 | switch(SSL_CONN_CONFIG(version)) { |
349 | case CURL_SSLVERSION_DEFAULT: |
350 | case CURL_SSLVERSION_TLSv1: |
351 | ssl_set_min_version(&BACKEND->ssl, SSL_MAJOR_VERSION_3, |
352 | SSL_MINOR_VERSION_1); |
353 | break; |
354 | case CURL_SSLVERSION_SSLv3: |
355 | ssl_set_min_version(&BACKEND->ssl, SSL_MAJOR_VERSION_3, |
356 | SSL_MINOR_VERSION_0); |
357 | ssl_set_max_version(&BACKEND->ssl, SSL_MAJOR_VERSION_3, |
358 | SSL_MINOR_VERSION_0); |
359 | infof(data, "PolarSSL: Forced min. SSL Version to be SSLv3\n" ); |
360 | break; |
361 | case CURL_SSLVERSION_TLSv1_0: |
362 | case CURL_SSLVERSION_TLSv1_1: |
363 | case CURL_SSLVERSION_TLSv1_2: |
364 | case CURL_SSLVERSION_TLSv1_3: |
365 | { |
366 | CURLcode result = set_ssl_version_min_max(conn, sockindex); |
367 | if(result != CURLE_OK) |
368 | return result; |
369 | break; |
370 | } |
371 | default: |
372 | failf(data, "Unrecognized parameter passed via CURLOPT_SSLVERSION" ); |
373 | return CURLE_SSL_CONNECT_ERROR; |
374 | } |
375 | |
376 | ssl_set_endpoint(&BACKEND->ssl, SSL_IS_CLIENT); |
377 | ssl_set_authmode(&BACKEND->ssl, SSL_VERIFY_OPTIONAL); |
378 | |
379 | ssl_set_rng(&BACKEND->ssl, ctr_drbg_random, |
380 | &BACKEND->ctr_drbg); |
381 | ssl_set_bio(&BACKEND->ssl, |
382 | net_recv, &conn->sock[sockindex], |
383 | net_send, &conn->sock[sockindex]); |
384 | |
385 | ssl_set_ciphersuites(&BACKEND->ssl, ssl_list_ciphersuites()); |
386 | |
387 | /* Check if there's a cached ID we can/should use here! */ |
388 | if(SSL_SET_OPTION(primary.sessionid)) { |
389 | void *old_session = NULL; |
390 | |
391 | Curl_ssl_sessionid_lock(conn); |
392 | if(!Curl_ssl_getsessionid(conn, &old_session, NULL, sockindex)) { |
393 | ret = ssl_set_session(&BACKEND->ssl, old_session); |
394 | if(ret) { |
395 | Curl_ssl_sessionid_unlock(conn); |
396 | failf(data, "ssl_set_session returned -0x%x" , -ret); |
397 | return CURLE_SSL_CONNECT_ERROR; |
398 | } |
399 | infof(data, "PolarSSL re-using session\n" ); |
400 | } |
401 | Curl_ssl_sessionid_unlock(conn); |
402 | } |
403 | |
404 | ssl_set_ca_chain(&BACKEND->ssl, |
405 | &BACKEND->cacert, |
406 | &BACKEND->crl, |
407 | hostname); |
408 | |
409 | ssl_set_own_cert_rsa(&BACKEND->ssl, |
410 | &BACKEND->clicert, &BACKEND->rsa); |
411 | |
412 | if(ssl_set_hostname(&BACKEND->ssl, hostname)) { |
413 | /* ssl_set_hostname() sets the name to use in CN/SAN checks *and* the name |
414 | to set in the SNI extension. So even if curl connects to a host |
415 | specified as an IP address, this function must be used. */ |
416 | failf(data, "couldn't set hostname in PolarSSL" ); |
417 | return CURLE_SSL_CONNECT_ERROR; |
418 | } |
419 | |
420 | #ifdef HAS_ALPN |
421 | if(conn->bits.tls_enable_alpn) { |
422 | static const char *protocols[3]; |
423 | int cur = 0; |
424 | |
425 | #ifdef USE_NGHTTP2 |
426 | if(data->set.httpversion >= CURL_HTTP_VERSION_2) { |
427 | protocols[cur++] = NGHTTP2_PROTO_VERSION_ID; |
428 | infof(data, "ALPN, offering %s\n" , NGHTTP2_PROTO_VERSION_ID); |
429 | } |
430 | #endif |
431 | |
432 | protocols[cur++] = ALPN_HTTP_1_1; |
433 | infof(data, "ALPN, offering %s\n" , ALPN_HTTP_1_1); |
434 | |
435 | protocols[cur] = NULL; |
436 | |
437 | ssl_set_alpn_protocols(&BACKEND->ssl, protocols); |
438 | } |
439 | #endif |
440 | |
441 | #ifdef POLARSSL_DEBUG |
442 | ssl_set_dbg(&BACKEND->ssl, polarssl_debug, data); |
443 | #endif |
444 | |
445 | connssl->connecting_state = ssl_connect_2; |
446 | |
447 | return CURLE_OK; |
448 | } |
449 | |
450 | static CURLcode |
451 | polarssl_connect_step2(struct connectdata *conn, |
452 | int sockindex) |
453 | { |
454 | int ret; |
455 | struct Curl_easy *data = conn->data; |
456 | struct ssl_connect_data* connssl = &conn->ssl[sockindex]; |
457 | char buffer[1024]; |
458 | const char * const pinnedpubkey = SSL_IS_PROXY() ? |
459 | data->set.str[STRING_SSL_PINNEDPUBLICKEY_PROXY] : |
460 | data->set.str[STRING_SSL_PINNEDPUBLICKEY_ORIG]; |
461 | |
462 | |
463 | char errorbuf[128]; |
464 | errorbuf[0] = 0; |
465 | |
466 | conn->recv[sockindex] = polarssl_recv; |
467 | conn->send[sockindex] = polarssl_send; |
468 | |
469 | ret = ssl_handshake(&BACKEND->ssl); |
470 | |
471 | switch(ret) { |
472 | case 0: |
473 | break; |
474 | |
475 | case POLARSSL_ERR_NET_WANT_READ: |
476 | connssl->connecting_state = ssl_connect_2_reading; |
477 | return CURLE_OK; |
478 | |
479 | case POLARSSL_ERR_NET_WANT_WRITE: |
480 | connssl->connecting_state = ssl_connect_2_writing; |
481 | return CURLE_OK; |
482 | |
483 | default: |
484 | error_strerror(ret, errorbuf, sizeof(errorbuf)); |
485 | failf(data, "ssl_handshake returned - PolarSSL: (-0x%04X) %s" , |
486 | -ret, errorbuf); |
487 | return CURLE_SSL_CONNECT_ERROR; |
488 | } |
489 | |
490 | infof(data, "PolarSSL: Handshake complete, cipher is %s\n" , |
491 | ssl_get_ciphersuite(&BACKEND->ssl) ); |
492 | |
493 | ret = ssl_get_verify_result(&BACKEND->ssl); |
494 | |
495 | if(ret && SSL_CONN_CONFIG(verifypeer)) { |
496 | if(ret & BADCERT_EXPIRED) |
497 | failf(data, "Cert verify failed: BADCERT_EXPIRED" ); |
498 | |
499 | if(ret & BADCERT_REVOKED) { |
500 | failf(data, "Cert verify failed: BADCERT_REVOKED" ); |
501 | return CURLE_PEER_FAILED_VERIFICATION; |
502 | } |
503 | |
504 | if(ret & BADCERT_CN_MISMATCH) |
505 | failf(data, "Cert verify failed: BADCERT_CN_MISMATCH" ); |
506 | |
507 | if(ret & BADCERT_NOT_TRUSTED) |
508 | failf(data, "Cert verify failed: BADCERT_NOT_TRUSTED" ); |
509 | |
510 | return CURLE_PEER_FAILED_VERIFICATION; |
511 | } |
512 | |
513 | if(ssl_get_peer_cert(&(BACKEND->ssl))) { |
514 | /* If the session was resumed, there will be no peer certs */ |
515 | memset(buffer, 0, sizeof(buffer)); |
516 | |
517 | if(x509_crt_info(buffer, sizeof(buffer), (char *)"* " , |
518 | ssl_get_peer_cert(&(BACKEND->ssl))) != -1) |
519 | infof(data, "Dumping cert info:\n%s\n" , buffer); |
520 | } |
521 | |
522 | /* adapted from mbedtls.c */ |
523 | if(pinnedpubkey) { |
524 | int size; |
525 | CURLcode result; |
526 | x509_crt *p; |
527 | unsigned char pubkey[PUB_DER_MAX_BYTES]; |
528 | const x509_crt *peercert; |
529 | |
530 | peercert = ssl_get_peer_cert(&BACKEND->ssl); |
531 | |
532 | if(!peercert || !peercert->raw.p || !peercert->raw.len) { |
533 | failf(data, "Failed due to missing peer certificate" ); |
534 | return CURLE_SSL_PINNEDPUBKEYNOTMATCH; |
535 | } |
536 | |
537 | p = calloc(1, sizeof(*p)); |
538 | |
539 | if(!p) |
540 | return CURLE_OUT_OF_MEMORY; |
541 | |
542 | x509_crt_init(p); |
543 | |
544 | /* Make a copy of our const peercert because pk_write_pubkey_der |
545 | needs a non-const key, for now. |
546 | https://github.com/ARMmbed/mbedtls/issues/396 */ |
547 | if(x509_crt_parse_der(p, peercert->raw.p, peercert->raw.len)) { |
548 | failf(data, "Failed copying peer certificate" ); |
549 | x509_crt_free(p); |
550 | free(p); |
551 | return CURLE_SSL_PINNEDPUBKEYNOTMATCH; |
552 | } |
553 | |
554 | size = pk_write_pubkey_der(&p->pk, pubkey, PUB_DER_MAX_BYTES); |
555 | |
556 | if(size <= 0) { |
557 | failf(data, "Failed copying public key from peer certificate" ); |
558 | x509_crt_free(p); |
559 | free(p); |
560 | return CURLE_SSL_PINNEDPUBKEYNOTMATCH; |
561 | } |
562 | |
563 | /* pk_write_pubkey_der writes data at the end of the buffer. */ |
564 | result = Curl_pin_peer_pubkey(data, |
565 | pinnedpubkey, |
566 | &pubkey[PUB_DER_MAX_BYTES - size], size); |
567 | if(result) { |
568 | x509_crt_free(p); |
569 | free(p); |
570 | return result; |
571 | } |
572 | |
573 | x509_crt_free(p); |
574 | free(p); |
575 | } |
576 | |
577 | #ifdef HAS_ALPN |
578 | if(conn->bits.tls_enable_alpn) { |
579 | const char *next_protocol = ssl_get_alpn_protocol(&BACKEND->ssl); |
580 | |
581 | if(next_protocol != NULL) { |
582 | infof(data, "ALPN, server accepted to use %s\n" , next_protocol); |
583 | |
584 | #ifdef USE_NGHTTP2 |
585 | if(!strncmp(next_protocol, NGHTTP2_PROTO_VERSION_ID, |
586 | NGHTTP2_PROTO_VERSION_ID_LEN)) { |
587 | conn->negnpn = CURL_HTTP_VERSION_2; |
588 | } |
589 | else |
590 | #endif |
591 | if(!strncmp(next_protocol, ALPN_HTTP_1_1, ALPN_HTTP_1_1_LENGTH)) { |
592 | conn->negnpn = CURL_HTTP_VERSION_1_1; |
593 | } |
594 | } |
595 | else |
596 | infof(data, "ALPN, server did not agree to a protocol\n" ); |
597 | Curl_multiuse_state(conn, conn->negnpn == CURL_HTTP_VERSION_2 ? |
598 | BUNDLE_MULTIPLEX : BUNDLE_NO_MULTIUSE); |
599 | } |
600 | #endif |
601 | |
602 | connssl->connecting_state = ssl_connect_3; |
603 | infof(data, "SSL connected\n" ); |
604 | |
605 | return CURLE_OK; |
606 | } |
607 | |
608 | static CURLcode |
609 | polarssl_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 = calloc(1, sizeof(ssl_session)); |
624 | if(!our_ssl_sessionid) |
625 | return CURLE_OUT_OF_MEMORY; |
626 | |
627 | ret = ssl_get_session(&BACKEND->ssl, our_ssl_sessionid); |
628 | if(ret) { |
629 | failf(data, "ssl_get_session returned -0x%x" , -ret); |
630 | return CURLE_SSL_CONNECT_ERROR; |
631 | } |
632 | |
633 | /* If there's already a matching session in the cache, delete it */ |
634 | Curl_ssl_sessionid_lock(conn); |
635 | if(!Curl_ssl_getsessionid(conn, &old_ssl_sessionid, NULL, sockindex)) |
636 | Curl_ssl_delsessionid(conn, old_ssl_sessionid); |
637 | |
638 | retcode = Curl_ssl_addsessionid(conn, our_ssl_sessionid, 0, sockindex); |
639 | Curl_ssl_sessionid_unlock(conn); |
640 | if(retcode) { |
641 | free(our_ssl_sessionid); |
642 | failf(data, "failed to store ssl session" ); |
643 | return retcode; |
644 | } |
645 | } |
646 | |
647 | connssl->connecting_state = ssl_connect_done; |
648 | |
649 | return CURLE_OK; |
650 | } |
651 | |
652 | static ssize_t polarssl_send(struct connectdata *conn, |
653 | int sockindex, |
654 | const void *mem, |
655 | size_t len, |
656 | CURLcode *curlcode) |
657 | { |
658 | struct ssl_connect_data *connssl = &conn->ssl[sockindex]; |
659 | int ret = -1; |
660 | |
661 | ret = ssl_write(&BACKEND->ssl, |
662 | (unsigned char *)mem, len); |
663 | |
664 | if(ret < 0) { |
665 | *curlcode = (ret == POLARSSL_ERR_NET_WANT_WRITE) ? |
666 | CURLE_AGAIN : CURLE_SEND_ERROR; |
667 | ret = -1; |
668 | } |
669 | |
670 | return ret; |
671 | } |
672 | |
673 | static void Curl_polarssl_close(struct connectdata *conn, int sockindex) |
674 | { |
675 | struct ssl_connect_data *connssl = &conn->ssl[sockindex]; |
676 | rsa_free(&BACKEND->rsa); |
677 | x509_crt_free(&BACKEND->clicert); |
678 | x509_crt_free(&BACKEND->cacert); |
679 | x509_crl_free(&BACKEND->crl); |
680 | ssl_free(&BACKEND->ssl); |
681 | } |
682 | |
683 | static ssize_t polarssl_recv(struct connectdata *conn, |
684 | int num, |
685 | char *buf, |
686 | size_t buffersize, |
687 | CURLcode *curlcode) |
688 | { |
689 | struct ssl_connect_data *connssl = &conn->ssl[num]; |
690 | int ret = -1; |
691 | ssize_t len = -1; |
692 | |
693 | memset(buf, 0, buffersize); |
694 | ret = ssl_read(&BACKEND->ssl, (unsigned char *)buf, buffersize); |
695 | |
696 | if(ret <= 0) { |
697 | if(ret == POLARSSL_ERR_SSL_PEER_CLOSE_NOTIFY) |
698 | return 0; |
699 | |
700 | *curlcode = (ret == POLARSSL_ERR_NET_WANT_READ) ? |
701 | CURLE_AGAIN : CURLE_RECV_ERROR; |
702 | return -1; |
703 | } |
704 | |
705 | len = ret; |
706 | |
707 | return len; |
708 | } |
709 | |
710 | static void Curl_polarssl_session_free(void *ptr) |
711 | { |
712 | ssl_session_free(ptr); |
713 | free(ptr); |
714 | } |
715 | |
716 | /* 1.3.10 was the first rebranded version. All new releases (in 1.3 branch and |
717 | higher) will be mbed TLS branded.. */ |
718 | |
719 | static size_t Curl_polarssl_version(char *buffer, size_t size) |
720 | { |
721 | unsigned int version = version_get_number(); |
722 | return msnprintf(buffer, size, "%s/%d.%d.%d" , |
723 | version >= 0x01030A00?"mbedTLS" :"PolarSSL" , |
724 | version>>24, (version>>16)&0xff, (version>>8)&0xff); |
725 | } |
726 | |
727 | static CURLcode |
728 | polarssl_connect_common(struct connectdata *conn, |
729 | int sockindex, |
730 | bool nonblocking, |
731 | bool *done) |
732 | { |
733 | CURLcode result; |
734 | struct Curl_easy *data = conn->data; |
735 | struct ssl_connect_data *connssl = &conn->ssl[sockindex]; |
736 | curl_socket_t sockfd = conn->sock[sockindex]; |
737 | timediff_t timeout_ms; |
738 | int what; |
739 | |
740 | /* check if the connection has already been established */ |
741 | if(ssl_connection_complete == connssl->state) { |
742 | *done = TRUE; |
743 | return CURLE_OK; |
744 | } |
745 | |
746 | if(ssl_connect_1 == connssl->connecting_state) { |
747 | /* Find out how much more time we're allowed */ |
748 | timeout_ms = Curl_timeleft(data, NULL, TRUE); |
749 | |
750 | if(timeout_ms < 0) { |
751 | /* no need to continue if time already is up */ |
752 | failf(data, "SSL connection timeout" ); |
753 | return CURLE_OPERATION_TIMEDOUT; |
754 | } |
755 | |
756 | result = polarssl_connect_step1(conn, sockindex); |
757 | if(result) |
758 | return result; |
759 | } |
760 | |
761 | while(ssl_connect_2 == connssl->connecting_state || |
762 | ssl_connect_2_reading == connssl->connecting_state || |
763 | ssl_connect_2_writing == connssl->connecting_state) { |
764 | |
765 | /* check allowed time left */ |
766 | timeout_ms = Curl_timeleft(data, NULL, TRUE); |
767 | |
768 | if(timeout_ms < 0) { |
769 | /* no need to continue if time already is up */ |
770 | failf(data, "SSL connection timeout" ); |
771 | return CURLE_OPERATION_TIMEDOUT; |
772 | } |
773 | |
774 | /* if ssl is expecting something, check if it's available. */ |
775 | if(connssl->connecting_state == ssl_connect_2_reading || |
776 | connssl->connecting_state == ssl_connect_2_writing) { |
777 | |
778 | curl_socket_t writefd = ssl_connect_2_writing == |
779 | connssl->connecting_state?sockfd:CURL_SOCKET_BAD; |
780 | curl_socket_t readfd = ssl_connect_2_reading == |
781 | connssl->connecting_state?sockfd:CURL_SOCKET_BAD; |
782 | |
783 | what = Curl_socket_check(readfd, CURL_SOCKET_BAD, writefd, |
784 | nonblocking?0:(time_t)timeout_ms); |
785 | if(what < 0) { |
786 | /* fatal error */ |
787 | failf(data, "select/poll on SSL socket, errno: %d" , SOCKERRNO); |
788 | return CURLE_SSL_CONNECT_ERROR; |
789 | } |
790 | else if(0 == what) { |
791 | if(nonblocking) { |
792 | *done = FALSE; |
793 | return CURLE_OK; |
794 | } |
795 | else { |
796 | /* timeout */ |
797 | failf(data, "SSL connection timeout" ); |
798 | return CURLE_OPERATION_TIMEDOUT; |
799 | } |
800 | } |
801 | /* socket is readable or writable */ |
802 | } |
803 | |
804 | /* Run transaction, and return to the caller if it failed or if |
805 | * this connection is part of a multi handle and this loop would |
806 | * execute again. This permits the owner of a multi handle to |
807 | * abort a connection attempt before step2 has completed while |
808 | * ensuring that a client using select() or epoll() will always |
809 | * have a valid fdset to wait on. |
810 | */ |
811 | result = polarssl_connect_step2(conn, sockindex); |
812 | if(result || (nonblocking && |
813 | (ssl_connect_2 == connssl->connecting_state || |
814 | ssl_connect_2_reading == connssl->connecting_state || |
815 | ssl_connect_2_writing == connssl->connecting_state))) |
816 | return result; |
817 | |
818 | } /* repeat step2 until all transactions are done. */ |
819 | |
820 | if(ssl_connect_3 == connssl->connecting_state) { |
821 | result = polarssl_connect_step3(conn, sockindex); |
822 | if(result) |
823 | return result; |
824 | } |
825 | |
826 | if(ssl_connect_done == connssl->connecting_state) { |
827 | connssl->state = ssl_connection_complete; |
828 | conn->recv[sockindex] = polarssl_recv; |
829 | conn->send[sockindex] = polarssl_send; |
830 | *done = TRUE; |
831 | } |
832 | else |
833 | *done = FALSE; |
834 | |
835 | /* Reset our connect state machine */ |
836 | connssl->connecting_state = ssl_connect_1; |
837 | |
838 | return CURLE_OK; |
839 | } |
840 | |
841 | static CURLcode Curl_polarssl_connect_nonblocking(struct connectdata *conn, |
842 | int sockindex, bool *done) |
843 | { |
844 | return polarssl_connect_common(conn, sockindex, TRUE, done); |
845 | } |
846 | |
847 | |
848 | static CURLcode Curl_polarssl_connect(struct connectdata *conn, int sockindex) |
849 | { |
850 | CURLcode result; |
851 | bool done = FALSE; |
852 | |
853 | result = polarssl_connect_common(conn, sockindex, FALSE, &done); |
854 | if(result) |
855 | return result; |
856 | |
857 | DEBUGASSERT(done); |
858 | |
859 | return CURLE_OK; |
860 | } |
861 | |
862 | /* |
863 | * return 0 error initializing SSL |
864 | * return 1 SSL initialized successfully |
865 | */ |
866 | static int Curl_polarssl_init(void) |
867 | { |
868 | return Curl_polarsslthreadlock_thread_setup(); |
869 | } |
870 | |
871 | static void Curl_polarssl_cleanup(void) |
872 | { |
873 | (void)Curl_polarsslthreadlock_thread_cleanup(); |
874 | } |
875 | |
876 | static bool Curl_polarssl_data_pending(const struct connectdata *conn, |
877 | int sockindex) |
878 | { |
879 | const struct ssl_connect_data *connssl = &conn->ssl[sockindex]; |
880 | return ssl_get_bytes_avail(&BACKEND->ssl) != 0; |
881 | } |
882 | |
883 | static CURLcode Curl_polarssl_sha256sum(const unsigned char *input, |
884 | size_t inputlen, |
885 | unsigned char *sha256sum, |
886 | size_t sha256len UNUSED_PARAM) |
887 | { |
888 | (void)sha256len; |
889 | sha256(input, inputlen, sha256sum, 0); |
890 | return CURLE_OK; |
891 | } |
892 | |
893 | static void *Curl_polarssl_get_internals(struct ssl_connect_data *connssl, |
894 | CURLINFO info UNUSED_PARAM) |
895 | { |
896 | (void)info; |
897 | return &BACKEND->ssl; |
898 | } |
899 | |
900 | const struct Curl_ssl Curl_ssl_polarssl = { |
901 | { CURLSSLBACKEND_POLARSSL, "polarssl" }, /* info */ |
902 | |
903 | SSLSUPP_CA_PATH | |
904 | SSLSUPP_PINNEDPUBKEY, |
905 | |
906 | sizeof(struct ssl_backend_data), |
907 | |
908 | Curl_polarssl_init, /* init */ |
909 | Curl_polarssl_cleanup, /* cleanup */ |
910 | Curl_polarssl_version, /* version */ |
911 | Curl_none_check_cxn, /* check_cxn */ |
912 | Curl_none_shutdown, /* shutdown */ |
913 | Curl_polarssl_data_pending, /* data_pending */ |
914 | /* This might cause libcurl to use a weeker random! */ |
915 | Curl_none_random, /* random */ |
916 | Curl_none_cert_status_request, /* cert_status_request */ |
917 | Curl_polarssl_connect, /* connect */ |
918 | Curl_polarssl_connect_nonblocking, /* connect_nonblocking */ |
919 | Curl_polarssl_get_internals, /* get_internals */ |
920 | Curl_polarssl_close, /* close_one */ |
921 | Curl_none_close_all, /* close_all */ |
922 | Curl_polarssl_session_free, /* session_free */ |
923 | Curl_none_set_engine, /* set_engine */ |
924 | Curl_none_set_engine_default, /* set_engine_default */ |
925 | Curl_none_engines_list, /* engines_list */ |
926 | Curl_none_false_start, /* false_start */ |
927 | Curl_none_md5sum, /* md5sum */ |
928 | Curl_polarssl_sha256sum /* sha256sum */ |
929 | }; |
930 | |
931 | #endif /* USE_POLARSSL */ |
932 | |