polarssl.c@ 86643

Last change on this file since 86643 was 85671, checked in by vboxsync, 4 years ago
Export out internal curl copy to make it a lot simpler to build VBox (OSE) on Windows. bugref:9814
Property svn:eol-style set to `native`
File size: 26.5 KB

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1	/***************************************************************************
2	* _ _ ____ _
3	* Project ___\| \| \| \| _ \\| \|
4	* / __\| \| \| \| \|_) \| \|
5	* \| (__\| \|_\| \| _ <\| \|___
6	* \___\|\___/\|_\| \_\_____\|
7	*
8	* Copyright (C) 2012 - 2018, Daniel Stenberg, <[email protected]>, et al.
9	* Copyright (C) 2010 - 2011, Hoi-Ho Chan, <[email protected]>
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
72	struct 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)
96	static entropy_context entropy;
97
98	static int entropy_init_initialized = 0;
99
100	/* start of entropy_init_mutex() */
101	static 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() */
114	static 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
132	static 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
152	static Curl_recv polarssl_recv;
153	static Curl_send polarssl_send;
154
155	static 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
173	static CURLcode
174	set_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	break;
189	}
190
191	switch(ssl_version_max) {
192	case CURL_SSLVERSION_MAX_NONE:
193	case CURL_SSLVERSION_MAX_DEFAULT:
194	ssl_version_max = CURL_SSLVERSION_MAX_TLSv1_2;
195	break;
196	}
197
198	result = polarssl_version_from_curl(&ssl_min_ver, ssl_version);
199	if(result) {
200	failf(data, "unsupported min version passed via CURLOPT_SSLVERSION");
201	return result;
202	}
203	result = polarssl_version_from_curl(&ssl_max_ver, ssl_version_max >> 16);
204	if(result) {
205	failf(data, "unsupported max version passed via CURLOPT_SSLVERSION");
206	return result;
207	}
208
209	ssl_set_min_version(&BACKEND->ssl, SSL_MAJOR_VERSION_3, ssl_min_ver);
210	ssl_set_max_version(&BACKEND->ssl, SSL_MAJOR_VERSION_3, ssl_max_ver);
211
212	return result;
213	}
214
215	static CURLcode
216	polarssl_connect_step1(struct connectdata *conn,
217	int sockindex)
218	{
219	struct Curl_easy *data = conn->data;
220	struct ssl_connect_data* connssl = &conn->ssl[sockindex];
221	const char *capath = SSL_CONN_CONFIG(CApath);
222	const char * const hostname = SSL_IS_PROXY() ? conn->http_proxy.host.name :
223	conn->host.name;
224	const long int port = SSL_IS_PROXY() ? conn->port : conn->remote_port;
225	int ret = -1;
226	char errorbuf[128];
227	errorbuf[0] = 0;
228
229	/* PolarSSL only supports SSLv3 and TLSv1 */
230	if(SSL_CONN_CONFIG(version) == CURL_SSLVERSION_SSLv2) {
231	failf(data, "PolarSSL does not support SSLv2");
232	return CURLE_SSL_CONNECT_ERROR;
233	}
234
235	#ifdef THREADING_SUPPORT
236	entropy_init_mutex(&entropy);
237
238	if((ret = ctr_drbg_init(&BACKEND->ctr_drbg, entropy_func_mutex, &entropy,
239	NULL, 0)) != 0) {
240	error_strerror(ret, errorbuf, sizeof(errorbuf));
241	failf(data, "Failed - PolarSSL: ctr_drbg_init returned (-0x%04X) %s\n",
242	-ret, errorbuf);
243	}
244	#else
245	entropy_init(&BACKEND->entropy);
246
247	if((ret = ctr_drbg_init(&BACKEND->ctr_drbg, entropy_func, &BACKEND->entropy,
248	NULL, 0)) != 0) {
249	error_strerror(ret, errorbuf, sizeof(errorbuf));
250	failf(data, "Failed - PolarSSL: ctr_drbg_init returned (-0x%04X) %s\n",
251	-ret, errorbuf);
252	}
253	#endif /* THREADING_SUPPORT */
254
255	/* Load the trusted CA */
256	memset(&BACKEND->cacert, 0, sizeof(x509_crt));
257
258	if(SSL_CONN_CONFIG(CAfile)) {
259	ret = x509_crt_parse_file(&BACKEND->cacert,
260	SSL_CONN_CONFIG(CAfile));
261
262	if(ret<0) {
263	error_strerror(ret, errorbuf, sizeof(errorbuf));
264	failf(data, "Error reading ca cert file %s - PolarSSL: (-0x%04X) %s",
265	SSL_CONN_CONFIG(CAfile), -ret, errorbuf);
266
267	if(SSL_CONN_CONFIG(verifypeer))
268	return CURLE_SSL_CACERT_BADFILE;
269	}
270	}
271
272	if(capath) {
273	ret = x509_crt_parse_path(&BACKEND->cacert, capath);
274
275	if(ret<0) {
276	error_strerror(ret, errorbuf, sizeof(errorbuf));
277	failf(data, "Error reading ca cert path %s - PolarSSL: (-0x%04X) %s",
278	capath, -ret, errorbuf);
279
280	if(SSL_CONN_CONFIG(verifypeer))
281	return CURLE_SSL_CACERT_BADFILE;
282	}
283	}
284
285	/* Load the client certificate */
286	memset(&BACKEND->clicert, 0, sizeof(x509_crt));
287
288	if(SSL_SET_OPTION(cert)) {
289	ret = x509_crt_parse_file(&BACKEND->clicert,
290	SSL_SET_OPTION(cert));
291
292	if(ret) {
293	error_strerror(ret, errorbuf, sizeof(errorbuf));
294	failf(data, "Error reading client cert file %s - PolarSSL: (-0x%04X) %s",
295	SSL_SET_OPTION(cert), -ret, errorbuf);
296
297	return CURLE_SSL_CERTPROBLEM;
298	}
299	}
300
301	/* Load the client private key */
302	if(SSL_SET_OPTION(key)) {
303	pk_context pk;
304	pk_init(&pk);
305	ret = pk_parse_keyfile(&pk, SSL_SET_OPTION(key),
306	SSL_SET_OPTION(key_passwd));
307	if(ret == 0 && !pk_can_do(&pk, POLARSSL_PK_RSA))
308	ret = POLARSSL_ERR_PK_TYPE_MISMATCH;
309	if(ret == 0)
310	rsa_copy(&BACKEND->rsa, pk_rsa(pk));
311	else
312	rsa_free(&BACKEND->rsa);
313	pk_free(&pk);
314
315	if(ret) {
316	error_strerror(ret, errorbuf, sizeof(errorbuf));
317	failf(data, "Error reading private key %s - PolarSSL: (-0x%04X) %s",
318	SSL_SET_OPTION(key), -ret, errorbuf);
319
320	return CURLE_SSL_CERTPROBLEM;
321	}
322	}
323
324	/* Load the CRL */
325	memset(&BACKEND->crl, 0, sizeof(x509_crl));
326
327	if(SSL_SET_OPTION(CRLfile)) {
328	ret = x509_crl_parse_file(&BACKEND->crl,
329	SSL_SET_OPTION(CRLfile));
330
331	if(ret) {
332	error_strerror(ret, errorbuf, sizeof(errorbuf));
333	failf(data, "Error reading CRL file %s - PolarSSL: (-0x%04X) %s",
334	SSL_SET_OPTION(CRLfile), -ret, errorbuf);
335
336	return CURLE_SSL_CRL_BADFILE;
337	}
338	}
339
340	infof(data, "PolarSSL: Connecting to %s:%d\n", hostname, port);
341
342	if(ssl_init(&BACKEND->ssl)) {
343	failf(data, "PolarSSL: ssl_init failed");
344	return CURLE_SSL_CONNECT_ERROR;
345	}
346
347	switch(SSL_CONN_CONFIG(version)) {
348	case CURL_SSLVERSION_DEFAULT:
349	case CURL_SSLVERSION_TLSv1:
350	ssl_set_min_version(&BACKEND->ssl, SSL_MAJOR_VERSION_3,
351	SSL_MINOR_VERSION_1);
352	break;
353	case CURL_SSLVERSION_SSLv3:
354	ssl_set_min_version(&BACKEND->ssl, SSL_MAJOR_VERSION_3,
355	SSL_MINOR_VERSION_0);
356	ssl_set_max_version(&BACKEND->ssl, SSL_MAJOR_VERSION_3,
357	SSL_MINOR_VERSION_0);
358	infof(data, "PolarSSL: Forced min. SSL Version to be SSLv3\n");
359	break;
360	case CURL_SSLVERSION_TLSv1_0:
361	case CURL_SSLVERSION_TLSv1_1:
362	case CURL_SSLVERSION_TLSv1_2:
363	case CURL_SSLVERSION_TLSv1_3:
364	{
365	CURLcode result = set_ssl_version_min_max(conn, sockindex);
366	if(result != CURLE_OK)
367	return result;
368	break;
369	}
370	default:
371	failf(data, "Unrecognized parameter passed via CURLOPT_SSLVERSION");
372	return CURLE_SSL_CONNECT_ERROR;
373	}
374
375	ssl_set_endpoint(&BACKEND->ssl, SSL_IS_CLIENT);
376	ssl_set_authmode(&BACKEND->ssl, SSL_VERIFY_OPTIONAL);
377
378	ssl_set_rng(&BACKEND->ssl, ctr_drbg_random,
379	&BACKEND->ctr_drbg);
380	ssl_set_bio(&BACKEND->ssl,
381	net_recv, &conn->sock[sockindex],
382	net_send, &conn->sock[sockindex]);
383
384	ssl_set_ciphersuites(&BACKEND->ssl, ssl_list_ciphersuites());
385
386	/* Check if there's a cached ID we can/should use here! */
387	if(SSL_SET_OPTION(primary.sessionid)) {
388	void *old_session = NULL;
389
390	Curl_ssl_sessionid_lock(conn);
391	if(!Curl_ssl_getsessionid(conn, &old_session, NULL, sockindex)) {
392	ret = ssl_set_session(&BACKEND->ssl, old_session);
393	if(ret) {
394	Curl_ssl_sessionid_unlock(conn);
395	failf(data, "ssl_set_session returned -0x%x", -ret);
396	return CURLE_SSL_CONNECT_ERROR;
397	}
398	infof(data, "PolarSSL re-using session\n");
399	}
400	Curl_ssl_sessionid_unlock(conn);
401	}
402
403	ssl_set_ca_chain(&BACKEND->ssl,
404	&BACKEND->cacert,
405	&BACKEND->crl,
406	hostname);
407
408	ssl_set_own_cert_rsa(&BACKEND->ssl,
409	&BACKEND->clicert, &BACKEND->rsa);
410
411	if(ssl_set_hostname(&BACKEND->ssl, hostname)) {
412	/* ssl_set_hostname() sets the name to use in CN/SAN checks and the name
413	to set in the SNI extension. So even if curl connects to a host
414	specified as an IP address, this function must be used. */
415	failf(data, "couldn't set hostname in PolarSSL");
416	return CURLE_SSL_CONNECT_ERROR;
417	}
418
419	#ifdef HAS_ALPN
420	if(conn->bits.tls_enable_alpn) {
421	static const char *protocols[3];
422	int cur = 0;
423
424	#ifdef USE_NGHTTP2
425	if(data->set.httpversion >= CURL_HTTP_VERSION_2) {
426	protocols[cur++] = NGHTTP2_PROTO_VERSION_ID;
427	infof(data, "ALPN, offering %s\n", NGHTTP2_PROTO_VERSION_ID);
428	}
429	#endif
430
431	protocols[cur++] = ALPN_HTTP_1_1;
432	infof(data, "ALPN, offering %s\n", ALPN_HTTP_1_1);
433
434	protocols[cur] = NULL;
435
436	ssl_set_alpn_protocols(&BACKEND->ssl, protocols);
437	}
438	#endif
439
440	#ifdef POLARSSL_DEBUG
441	ssl_set_dbg(&BACKEND->ssl, polarssl_debug, data);
442	#endif
443
444	connssl->connecting_state = ssl_connect_2;
445
446	return CURLE_OK;
447	}
448
449	static CURLcode
450	polarssl_connect_step2(struct connectdata *conn,
451	int sockindex)
452	{
453	int ret;
454	struct Curl_easy *data = conn->data;
455	struct ssl_connect_data* connssl = &conn->ssl[sockindex];
456	char buffer[1024];
457	const char * const pinnedpubkey = SSL_IS_PROXY() ?
458	data->set.str[STRING_SSL_PINNEDPUBLICKEY_PROXY] :
459	data->set.str[STRING_SSL_PINNEDPUBLICKEY_ORIG];
460
461
462	char errorbuf[128];
463	errorbuf[0] = 0;
464
465	conn->recv[sockindex] = polarssl_recv;
466	conn->send[sockindex] = polarssl_send;
467
468	ret = ssl_handshake(&BACKEND->ssl);
469
470	switch(ret) {
471	case 0:
472	break;
473
474	case POLARSSL_ERR_NET_WANT_READ:
475	connssl->connecting_state = ssl_connect_2_reading;
476	return CURLE_OK;
477
478	case POLARSSL_ERR_NET_WANT_WRITE:
479	connssl->connecting_state = ssl_connect_2_writing;
480	return CURLE_OK;
481
482	default:
483	error_strerror(ret, errorbuf, sizeof(errorbuf));
484	failf(data, "ssl_handshake returned - PolarSSL: (-0x%04X) %s",
485	-ret, errorbuf);
486	return CURLE_SSL_CONNECT_ERROR;
487	}
488
489	infof(data, "PolarSSL: Handshake complete, cipher is %s\n",
490	ssl_get_ciphersuite(&BACKEND->ssl) );
491
492	ret = ssl_get_verify_result(&BACKEND->ssl);
493
494	if(ret && SSL_CONN_CONFIG(verifypeer)) {
495	if(ret & BADCERT_EXPIRED)
496	failf(data, "Cert verify failed: BADCERT_EXPIRED");
497
498	if(ret & BADCERT_REVOKED) {
499	failf(data, "Cert verify failed: BADCERT_REVOKED");
500	return CURLE_PEER_FAILED_VERIFICATION;
501	}
502
503	if(ret & BADCERT_CN_MISMATCH)
504	failf(data, "Cert verify failed: BADCERT_CN_MISMATCH");
505
506	if(ret & BADCERT_NOT_TRUSTED)
507	failf(data, "Cert verify failed: BADCERT_NOT_TRUSTED");
508
509	return CURLE_PEER_FAILED_VERIFICATION;
510	}
511
512	if(ssl_get_peer_cert(&(BACKEND->ssl))) {
513	/* If the session was resumed, there will be no peer certs */
514	memset(buffer, 0, sizeof(buffer));
515
516	if(x509_crt_info(buffer, sizeof(buffer), (char )" ",
517	ssl_get_peer_cert(&(BACKEND->ssl))) != -1)
518	infof(data, "Dumping cert info:\n%s\n", buffer);
519	}
520
521	/* adapted from mbedtls.c */
522	if(pinnedpubkey) {
523	int size;
524	CURLcode result;
525	x509_crt *p;
526	unsigned char pubkey[PUB_DER_MAX_BYTES];
527	const x509_crt *peercert;
528
529	peercert = ssl_get_peer_cert(&BACKEND->ssl);
530
531	if(!peercert \|\| !peercert->raw.p \|\| !peercert->raw.len) {
532	failf(data, "Failed due to missing peer certificate");
533	return CURLE_SSL_PINNEDPUBKEYNOTMATCH;
534	}
535
536	p = calloc(1, sizeof(*p));
537
538	if(!p)
539	return CURLE_OUT_OF_MEMORY;
540
541	x509_crt_init(p);
542
543	/* Make a copy of our const peercert because pk_write_pubkey_der
544	needs a non-const key, for now.
545	https://github.com/ARMmbed/mbedtls/issues/396 */
546	if(x509_crt_parse_der(p, peercert->raw.p, peercert->raw.len)) {
547	failf(data, "Failed copying peer certificate");
548	x509_crt_free(p);
549	free(p);
550	return CURLE_SSL_PINNEDPUBKEYNOTMATCH;
551	}
552
553	size = pk_write_pubkey_der(&p->pk, pubkey, PUB_DER_MAX_BYTES);
554
555	if(size <= 0) {
556	failf(data, "Failed copying public key from peer certificate");
557	x509_crt_free(p);
558	free(p);
559	return CURLE_SSL_PINNEDPUBKEYNOTMATCH;
560	}
561
562	/* pk_write_pubkey_der writes data at the end of the buffer. */
563	result = Curl_pin_peer_pubkey(data,
564	pinnedpubkey,
565	&pubkey[PUB_DER_MAX_BYTES - size], size);
566	if(result) {
567	x509_crt_free(p);
568	free(p);
569	return result;
570	}
571
572	x509_crt_free(p);
573	free(p);
574	}
575
576	#ifdef HAS_ALPN
577	if(conn->bits.tls_enable_alpn) {
578	const char *next_protocol = ssl_get_alpn_protocol(&BACKEND->ssl);
579
580	if(next_protocol != NULL) {
581	infof(data, "ALPN, server accepted to use %s\n", next_protocol);
582
583	#ifdef USE_NGHTTP2
584	if(!strncmp(next_protocol, NGHTTP2_PROTO_VERSION_ID,
585	NGHTTP2_PROTO_VERSION_ID_LEN)) {
586	conn->negnpn = CURL_HTTP_VERSION_2;
587	}
588	else
589	#endif
590	if(!strncmp(next_protocol, ALPN_HTTP_1_1, ALPN_HTTP_1_1_LENGTH)) {
591	conn->negnpn = CURL_HTTP_VERSION_1_1;
592	}
593	}
594	else
595	infof(data, "ALPN, server did not agree to a protocol\n");
596	}
597	#endif
598
599	connssl->connecting_state = ssl_connect_3;
600	infof(data, "SSL connected\n");
601
602	return CURLE_OK;
603	}
604
605	static CURLcode
606	polarssl_connect_step3(struct connectdata *conn,
607	int sockindex)
608	{
609	CURLcode retcode = CURLE_OK;
610	struct ssl_connect_data *connssl = &conn->ssl[sockindex];
611	struct Curl_easy *data = conn->data;
612
613	DEBUGASSERT(ssl_connect_3 == connssl->connecting_state);
614
615	if(SSL_SET_OPTION(primary.sessionid)) {
616	int ret;
617	ssl_session *our_ssl_sessionid;
618	void *old_ssl_sessionid = NULL;
619
620	our_ssl_sessionid = calloc(1, sizeof(ssl_session));
621	if(!our_ssl_sessionid)
622	return CURLE_OUT_OF_MEMORY;
623
624	ret = ssl_get_session(&BACKEND->ssl, our_ssl_sessionid);
625	if(ret) {
626	failf(data, "ssl_get_session returned -0x%x", -ret);
627	return CURLE_SSL_CONNECT_ERROR;
628	}
629
630	/* If there's already a matching session in the cache, delete it */
631	Curl_ssl_sessionid_lock(conn);
632	if(!Curl_ssl_getsessionid(conn, &old_ssl_sessionid, NULL, sockindex))
633	Curl_ssl_delsessionid(conn, old_ssl_sessionid);
634
635	retcode = Curl_ssl_addsessionid(conn, our_ssl_sessionid, 0, sockindex);
636	Curl_ssl_sessionid_unlock(conn);
637	if(retcode) {
638	free(our_ssl_sessionid);
639	failf(data, "failed to store ssl session");
640	return retcode;
641	}
642	}
643
644	connssl->connecting_state = ssl_connect_done;
645
646	return CURLE_OK;
647	}
648
649	static ssize_t polarssl_send(struct connectdata *conn,
650	int sockindex,
651	const void *mem,
652	size_t len,
653	CURLcode *curlcode)
654	{
655	struct ssl_connect_data *connssl = &conn->ssl[sockindex];
656	int ret = -1;
657
658	ret = ssl_write(&BACKEND->ssl,
659	(unsigned char *)mem, len);
660
661	if(ret < 0) {
662	*curlcode = (ret == POLARSSL_ERR_NET_WANT_WRITE) ?
663	CURLE_AGAIN : CURLE_SEND_ERROR;
664	ret = -1;
665	}
666
667	return ret;
668	}
669
670	static void Curl_polarssl_close(struct connectdata *conn, int sockindex)
671	{
672	struct ssl_connect_data *connssl = &conn->ssl[sockindex];
673	rsa_free(&BACKEND->rsa);
674	x509_crt_free(&BACKEND->clicert);
675	x509_crt_free(&BACKEND->cacert);
676	x509_crl_free(&BACKEND->crl);
677	ssl_free(&BACKEND->ssl);
678	}
679
680	static ssize_t polarssl_recv(struct connectdata *conn,
681	int num,
682	char *buf,
683	size_t buffersize,
684	CURLcode *curlcode)
685	{
686	struct ssl_connect_data *connssl = &conn->ssl[num];
687	int ret = -1;
688	ssize_t len = -1;
689
690	memset(buf, 0, buffersize);
691	ret = ssl_read(&BACKEND->ssl, (unsigned char *)buf, buffersize);
692
693	if(ret <= 0) {
694	if(ret == POLARSSL_ERR_SSL_PEER_CLOSE_NOTIFY)
695	return 0;
696
697	*curlcode = (ret == POLARSSL_ERR_NET_WANT_READ) ?
698	CURLE_AGAIN : CURLE_RECV_ERROR;
699	return -1;
700	}
701
702	len = ret;
703
704	return len;
705	}
706
707	static void Curl_polarssl_session_free(void *ptr)
708	{
709	ssl_session_free(ptr);
710	free(ptr);
711	}
712
713	/* 1.3.10 was the first rebranded version. All new releases (in 1.3 branch and
714	higher) will be mbed TLS branded.. */
715
716	static size_t Curl_polarssl_version(char *buffer, size_t size)
717	{
718	unsigned int version = version_get_number();
719	return msnprintf(buffer, size, "%s/%d.%d.%d",
720	version >= 0x01030A00?"mbedTLS":"PolarSSL",
721	version>>24, (version>>16)&0xff, (version>>8)&0xff);
722	}
723
724	static CURLcode
725	polarssl_connect_common(struct connectdata *conn,
726	int sockindex,
727	bool nonblocking,
728	bool *done)
729	{
730	CURLcode result;
731	struct Curl_easy *data = conn->data;
732	struct ssl_connect_data *connssl = &conn->ssl[sockindex];
733	curl_socket_t sockfd = conn->sock[sockindex];
734	long timeout_ms;
735	int what;
736
737	/* check if the connection has already been established */
738	if(ssl_connection_complete == connssl->state) {
739	*done = TRUE;
740	return CURLE_OK;
741	}
742
743	if(ssl_connect_1 == connssl->connecting_state) {
744	/* Find out how much more time we're allowed */
745	timeout_ms = Curl_timeleft(data, NULL, TRUE);
746
747	if(timeout_ms < 0) {
748	/* no need to continue if time already is up */
749	failf(data, "SSL connection timeout");
750	return CURLE_OPERATION_TIMEDOUT;
751	}
752
753	result = polarssl_connect_step1(conn, sockindex);
754	if(result)
755	return result;
756	}
757
758	while(ssl_connect_2 == connssl->connecting_state \|\|
759	ssl_connect_2_reading == connssl->connecting_state \|\|
760	ssl_connect_2_writing == connssl->connecting_state) {
761
762	/* check allowed time left */
763	timeout_ms = Curl_timeleft(data, NULL, TRUE);
764
765	if(timeout_ms < 0) {
766	/* no need to continue if time already is up */
767	failf(data, "SSL connection timeout");
768	return CURLE_OPERATION_TIMEDOUT;
769	}
770
771	/* if ssl is expecting something, check if it's available. */
772	if(connssl->connecting_state == ssl_connect_2_reading \|\|
773	connssl->connecting_state == ssl_connect_2_writing) {
774
775	curl_socket_t writefd = ssl_connect_2_writing ==
776	connssl->connecting_state?sockfd:CURL_SOCKET_BAD;
777	curl_socket_t readfd = ssl_connect_2_reading ==
778	connssl->connecting_state?sockfd:CURL_SOCKET_BAD;
779
780	what = Curl_socket_check(readfd, CURL_SOCKET_BAD, writefd,
781	nonblocking?0:timeout_ms);
782	if(what < 0) {
783	/* fatal error */
784	failf(data, "select/poll on SSL socket, errno: %d", SOCKERRNO);
785	return CURLE_SSL_CONNECT_ERROR;
786	}
787	else if(0 == what) {
788	if(nonblocking) {
789	*done = FALSE;
790	return CURLE_OK;
791	}
792	else {
793	/* timeout */
794	failf(data, "SSL connection timeout");
795	return CURLE_OPERATION_TIMEDOUT;
796	}
797	}
798	/* socket is readable or writable */
799	}
800
801	/* Run transaction, and return to the caller if it failed or if
802	* this connection is part of a multi handle and this loop would
803	* execute again. This permits the owner of a multi handle to
804	* abort a connection attempt before step2 has completed while
805	* ensuring that a client using select() or epoll() will always
806	* have a valid fdset to wait on.
807	*/
808	result = polarssl_connect_step2(conn, sockindex);
809	if(result \|\| (nonblocking &&
810	(ssl_connect_2 == connssl->connecting_state \|\|
811	ssl_connect_2_reading == connssl->connecting_state \|\|
812	ssl_connect_2_writing == connssl->connecting_state)))
813	return result;
814
815	} /* repeat step2 until all transactions are done. */
816
817	if(ssl_connect_3 == connssl->connecting_state) {
818	result = polarssl_connect_step3(conn, sockindex);
819	if(result)
820	return result;
821	}
822
823	if(ssl_connect_done == connssl->connecting_state) {
824	connssl->state = ssl_connection_complete;
825	conn->recv[sockindex] = polarssl_recv;
826	conn->send[sockindex] = polarssl_send;
827	*done = TRUE;
828	}
829	else
830	*done = FALSE;
831
832	/* Reset our connect state machine */
833	connssl->connecting_state = ssl_connect_1;
834
835	return CURLE_OK;
836	}
837
838	static CURLcode Curl_polarssl_connect_nonblocking(struct connectdata *conn,
839	int sockindex, bool *done)
840	{
841	return polarssl_connect_common(conn, sockindex, TRUE, done);
842	}
843
844
845	static CURLcode Curl_polarssl_connect(struct connectdata *conn, int sockindex)
846	{
847	CURLcode result;
848	bool done = FALSE;
849
850	result = polarssl_connect_common(conn, sockindex, FALSE, &done);
851	if(result)
852	return result;
853
854	DEBUGASSERT(done);
855
856	return CURLE_OK;
857	}
858
859	/*
860	* return 0 error initializing SSL
861	* return 1 SSL initialized successfully
862	*/
863	static int Curl_polarssl_init(void)
864	{
865	return Curl_polarsslthreadlock_thread_setup();
866	}
867
868	static void Curl_polarssl_cleanup(void)
869	{
870	(void)Curl_polarsslthreadlock_thread_cleanup();
871	}
872
873	static bool Curl_polarssl_data_pending(const struct connectdata *conn,
874	int sockindex)
875	{
876	const struct ssl_connect_data *connssl = &conn->ssl[sockindex];
877	return ssl_get_bytes_avail(&BACKEND->ssl) != 0;
878	}
879
880	static CURLcode Curl_polarssl_sha256sum(const unsigned char *input,
881	size_t inputlen,
882	unsigned char *sha256sum,
883	size_t sha256len UNUSED_PARAM)
884	{
885	(void)sha256len;
886	sha256(input, inputlen, sha256sum, 0);
887	return CURLE_OK;
888	}
889
890	static void Curl_polarssl_get_internals(struct ssl_connect_data connssl,
891	CURLINFO info UNUSED_PARAM)
892	{
893	(void)info;
894	return &BACKEND->ssl;
895	}
896
897	const struct Curl_ssl Curl_ssl_polarssl = {
898	{ CURLSSLBACKEND_POLARSSL, "polarssl" }, /* info */
899
900	SSLSUPP_CA_PATH \|
901	SSLSUPP_PINNEDPUBKEY,
902
903	sizeof(struct ssl_backend_data),
904
905	Curl_polarssl_init, /* init */
906	Curl_polarssl_cleanup, /* cleanup */
907	Curl_polarssl_version, /* version */
908	Curl_none_check_cxn, /* check_cxn */
909	Curl_none_shutdown, /* shutdown */
910	Curl_polarssl_data_pending, /* data_pending */
911	/* This might cause libcurl to use a weeker random!
912	* TODO: use Polarssl's CTR-DRBG or HMAC-DRBG
913	*/
914	Curl_none_random, /* random */
915	Curl_none_cert_status_request, /* cert_status_request */
916	Curl_polarssl_connect, /* connect */
917	Curl_polarssl_connect_nonblocking, /* connect_nonblocking */
918	Curl_polarssl_get_internals, /* get_internals */
919	Curl_polarssl_close, /* close_one */
920	Curl_none_close_all, /* close_all */
921	Curl_polarssl_session_free, /* session_free */
922	Curl_none_set_engine, /* set_engine */
923	Curl_none_set_engine_default, /* set_engine_default */
924	Curl_none_engines_list, /* engines_list */
925	Curl_none_false_start, /* false_start */
926	Curl_none_md5sum, /* md5sum */
927	Curl_polarssl_sha256sum /* sha256sum */
928	};
929
930	#endif /* USE_POLARSSL */

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source: vbox/trunk/src/libs/curl-7.64.0/lib/vtls/polarssl.c@ 86643

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