mbedtls.c@ 95312

Last change on this file since 95312 was 95312, checked in by vboxsync, 3 years ago
libs/{curl,libxml2}: OSE export fixes, bugref:8515
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1	/***************************************************************************
2	* _ _ ____ _
3	* Project ___\| \| \| \| _ \\| \|
4	* / __\| \| \| \| \|_) \| \|
5	* \| (__\| \|_\| \| _ <\| \|___
6	* \___\|\___/\|_\| \_\_____\|
7	*
8	* Copyright (C) 2012 - 2022, 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.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 mbedTLS-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_MBEDTLS
33
34	/* Define this to enable lots of debugging for mbedTLS */
35	/* #define MBEDTLS_DEBUG */
36
37	#include <mbedtls/version.h>
38	#if MBEDTLS_VERSION_NUMBER >= 0x02040000
39	#include <mbedtls/net_sockets.h>
40	#else
41	#include <mbedtls/net.h>
42	#endif
43	#include <mbedtls/ssl.h>
44	#include <mbedtls/x509.h>
45
46	#include <mbedtls/error.h>
47	#include <mbedtls/entropy.h>
48	#include <mbedtls/ctr_drbg.h>
49	#include <mbedtls/sha256.h>
50
51	#if MBEDTLS_VERSION_MAJOR >= 2
52	# ifdef MBEDTLS_DEBUG
53	# include <mbedtls/debug.h>
54	# endif
55	#endif
56
57	#include "urldata.h"
58	#include "sendf.h"
59	#include "inet_pton.h"
60	#include "mbedtls.h"
61	#include "vtls.h"
62	#include "parsedate.h"
63	#include "connect.h" /* for the connect timeout */
64	#include "select.h"
65	#include "multiif.h"
66	#include "mbedtls_threadlock.h"
67
68	/* The last 3 #include files should be in this order */
69	#include "curl_printf.h"
70	#include "curl_memory.h"
71	#include "memdebug.h"
72
73	/* ALPN for http2 */
74	#ifdef USE_HTTP2
75	# undef HAS_ALPN
76	# ifdef MBEDTLS_SSL_ALPN
77	# define HAS_ALPN
78	# endif
79	#endif
80
81	struct ssl_backend_data {
82	mbedtls_ctr_drbg_context ctr_drbg;
83	mbedtls_entropy_context entropy;
84	mbedtls_ssl_context ssl;
85	mbedtls_x509_crt cacert;
86	mbedtls_x509_crt clicert;
87	#ifdef MBEDTLS_X509_CRL_PARSE_C
88	mbedtls_x509_crl crl;
89	#endif
90	mbedtls_pk_context pk;
91	mbedtls_ssl_config config;
92	#ifdef HAS_ALPN
93	const char *protocols[3];
94	#endif
95	};
96
97	/* apply threading? */
98	#if defined(USE_THREADS_POSIX) \|\| defined(USE_THREADS_WIN32)
99	#define THREADING_SUPPORT
100	#endif
101
102	#ifndef MBEDTLS_ERROR_C
103	#define mbedtls_strerror(a,b,c) b[0] = 0
104	#endif
105
106	#if defined(THREADING_SUPPORT)
107	static mbedtls_entropy_context ts_entropy;
108
109	static int entropy_init_initialized = 0;
110
111	/* start of entropy_init_mutex() */
112	static void entropy_init_mutex(mbedtls_entropy_context *ctx)
113	{
114	/* lock 0 = entropy_init_mutex() */
115	Curl_mbedtlsthreadlock_lock_function(0);
116	if(entropy_init_initialized == 0) {
117	mbedtls_entropy_init(ctx);
118	entropy_init_initialized = 1;
119	}
120	Curl_mbedtlsthreadlock_unlock_function(0);
121	}
122	/* end of entropy_init_mutex() */
123
124	/* start of entropy_func_mutex() */
125	static int entropy_func_mutex(void data, unsigned char output, size_t len)
126	{
127	int ret;
128	/* lock 1 = entropy_func_mutex() */
129	Curl_mbedtlsthreadlock_lock_function(1);
130	ret = mbedtls_entropy_func(data, output, len);
131	Curl_mbedtlsthreadlock_unlock_function(1);
132
133	return ret;
134	}
135	/* end of entropy_func_mutex() */
136
137	#endif /* THREADING_SUPPORT */
138
139	#ifdef MBEDTLS_DEBUG
140	static void mbed_debug(void context, int level, const char f_name,
141	int line_nb, const char *line)
142	{
143	struct Curl_easy *data = NULL;
144
145	if(!context)
146	return;
147
148	data = (struct Curl_easy *)context;
149
150	infof(data, "%s", line);
151	(void) level;
152	}
153	#else
154	#endif
155
156	/*
157	* profile
158	*/
159	static const mbedtls_x509_crt_profile mbedtls_x509_crt_profile_fr =
160	{
161	/* Hashes from SHA-1 and above */
162	MBEDTLS_X509_ID_FLAG(MBEDTLS_MD_SHA1) \|
163	MBEDTLS_X509_ID_FLAG(MBEDTLS_MD_RIPEMD160) \|
164	MBEDTLS_X509_ID_FLAG(MBEDTLS_MD_SHA224) \|
165	MBEDTLS_X509_ID_FLAG(MBEDTLS_MD_SHA256) \|
166	MBEDTLS_X509_ID_FLAG(MBEDTLS_MD_SHA384) \|
167	MBEDTLS_X509_ID_FLAG(MBEDTLS_MD_SHA512),
168	0xFFFFFFF, /* Any PK alg */
169	0xFFFFFFF, /* Any curve */
170	1024, /* RSA min key len */
171	};
172
173	/* See https://tls.mbed.org/discussions/generic/
174	howto-determine-exact-buffer-len-for-mbedtls_pk_write_pubkey_der
175	*/
176	#define RSA_PUB_DER_MAX_BYTES (38 + 2 * MBEDTLS_MPI_MAX_SIZE)
177	#define ECP_PUB_DER_MAX_BYTES (30 + 2 * MBEDTLS_ECP_MAX_BYTES)
178
179	#define PUB_DER_MAX_BYTES (RSA_PUB_DER_MAX_BYTES > ECP_PUB_DER_MAX_BYTES ? \
180	RSA_PUB_DER_MAX_BYTES : ECP_PUB_DER_MAX_BYTES)
181
182	static Curl_recv mbed_recv;
183	static Curl_send mbed_send;
184
185	static CURLcode mbedtls_version_from_curl(int *mbedver, long version)
186	{
187	#if MBEDTLS_VERSION_NUMBER >= 0x03000000
188	switch(version) {
189	case CURL_SSLVERSION_TLSv1_0:
190	case CURL_SSLVERSION_TLSv1_1:
191	case CURL_SSLVERSION_TLSv1_2:
192	*mbedver = MBEDTLS_SSL_MINOR_VERSION_3;
193	return CURLE_OK;
194	case CURL_SSLVERSION_TLSv1_3:
195	break;
196	}
197	#else
198	switch(version) {
199	case CURL_SSLVERSION_TLSv1_0:
200	*mbedver = MBEDTLS_SSL_MINOR_VERSION_1;
201	return CURLE_OK;
202	case CURL_SSLVERSION_TLSv1_1:
203	*mbedver = MBEDTLS_SSL_MINOR_VERSION_2;
204	return CURLE_OK;
205	case CURL_SSLVERSION_TLSv1_2:
206	*mbedver = MBEDTLS_SSL_MINOR_VERSION_3;
207	return CURLE_OK;
208	case CURL_SSLVERSION_TLSv1_3:
209	break;
210	}
211	#endif
212
213	return CURLE_SSL_CONNECT_ERROR;
214	}
215
216	static CURLcode
217	set_ssl_version_min_max(struct Curl_easy data, struct connectdata conn,
218	int sockindex)
219	{
220	struct ssl_connect_data *connssl = &conn->ssl[sockindex];
221	struct ssl_backend_data *backend = connssl->backend;
222	#if MBEDTLS_VERSION_NUMBER >= 0x03000000
223	int mbedtls_ver_min = MBEDTLS_SSL_MINOR_VERSION_3;
224	int mbedtls_ver_max = MBEDTLS_SSL_MINOR_VERSION_3;
225	#else
226	int mbedtls_ver_min = MBEDTLS_SSL_MINOR_VERSION_1;
227	int mbedtls_ver_max = MBEDTLS_SSL_MINOR_VERSION_1;
228	#endif
229	long ssl_version = SSL_CONN_CONFIG(version);
230	long ssl_version_max = SSL_CONN_CONFIG(version_max);
231	CURLcode result = CURLE_OK;
232
233	DEBUGASSERT(backend);
234
235	switch(ssl_version) {
236	case CURL_SSLVERSION_DEFAULT:
237	case CURL_SSLVERSION_TLSv1:
238	ssl_version = CURL_SSLVERSION_TLSv1_0;
239	break;
240	}
241
242	switch(ssl_version_max) {
243	case CURL_SSLVERSION_MAX_NONE:
244	case CURL_SSLVERSION_MAX_DEFAULT:
245	ssl_version_max = CURL_SSLVERSION_MAX_TLSv1_2;
246	break;
247	}
248
249	result = mbedtls_version_from_curl(&mbedtls_ver_min, ssl_version);
250	if(result) {
251	failf(data, "unsupported min version passed via CURLOPT_SSLVERSION");
252	return result;
253	}
254	result = mbedtls_version_from_curl(&mbedtls_ver_max, ssl_version_max >> 16);
255	if(result) {
256	failf(data, "unsupported max version passed via CURLOPT_SSLVERSION");
257	return result;
258	}
259
260	mbedtls_ssl_conf_min_version(&backend->config, MBEDTLS_SSL_MAJOR_VERSION_3,
261	mbedtls_ver_min);
262	mbedtls_ssl_conf_max_version(&backend->config, MBEDTLS_SSL_MAJOR_VERSION_3,
263	mbedtls_ver_max);
264
265	return result;
266	}
267
268	static CURLcode
269	mbed_connect_step1(struct Curl_easy data, struct connectdata conn,
270	int sockindex)
271	{
272	struct ssl_connect_data *connssl = &conn->ssl[sockindex];
273	struct ssl_backend_data *backend = connssl->backend;
274	const struct curl_blob *ca_info_blob = SSL_CONN_CONFIG(ca_info_blob);
275	const char * const ssl_cafile =
276	/* CURLOPT_CAINFO_BLOB overrides CURLOPT_CAINFO */
277	(ca_info_blob ? NULL : SSL_CONN_CONFIG(CAfile));
278	const bool verifypeer = SSL_CONN_CONFIG(verifypeer);
279	const char * const ssl_capath = SSL_CONN_CONFIG(CApath);
280	char * const ssl_cert = SSL_SET_OPTION(primary.clientcert);
281	const struct curl_blob *ssl_cert_blob = SSL_SET_OPTION(primary.cert_blob);
282	const char * const ssl_crlfile = SSL_SET_OPTION(primary.CRLfile);
283	const char * const hostname = SSL_HOST_NAME();
284	#ifndef CURL_DISABLE_VERBOSE_STRINGS
285	const long int port = SSL_HOST_PORT();
286	#endif
287	int ret = -1;
288	char errorbuf[128];
289
290	DEBUGASSERT(backend);
291
292	if((SSL_CONN_CONFIG(version) == CURL_SSLVERSION_SSLv2) \|\|
293	(SSL_CONN_CONFIG(version) == CURL_SSLVERSION_SSLv3)) {
294	failf(data, "Not supported SSL version");
295	return CURLE_NOT_BUILT_IN;
296	}
297
298	#ifdef THREADING_SUPPORT
299	entropy_init_mutex(&ts_entropy);
300	mbedtls_ctr_drbg_init(&backend->ctr_drbg);
301
302	ret = mbedtls_ctr_drbg_seed(&backend->ctr_drbg, entropy_func_mutex,
303	&ts_entropy, NULL, 0);
304	if(ret) {
305	mbedtls_strerror(ret, errorbuf, sizeof(errorbuf));
306	failf(data, "mbedtls_ctr_drbg_seed returned (-0x%04X) %s",
307	-ret, errorbuf);
308	return CURLE_FAILED_INIT;
309	}
310	#else
311	mbedtls_entropy_init(&backend->entropy);
312	mbedtls_ctr_drbg_init(&backend->ctr_drbg);
313
314	ret = mbedtls_ctr_drbg_seed(&backend->ctr_drbg, mbedtls_entropy_func,
315	&backend->entropy, NULL, 0);
316	if(ret) {
317	mbedtls_strerror(ret, errorbuf, sizeof(errorbuf));
318	failf(data, "mbedtls_ctr_drbg_seed returned (-0x%04X) %s",
319	-ret, errorbuf);
320	return CURLE_FAILED_INIT;
321	}
322	#endif /* THREADING_SUPPORT */
323
324	/* Load the trusted CA */
325	mbedtls_x509_crt_init(&backend->cacert);
326
327	if(ca_info_blob && verifypeer) {
328	/* Unfortunately, mbedtls_x509_crt_parse() requires the data to be null
329	terminated even when provided the exact length, forcing us to waste
330	extra memory here. */
331	unsigned char *newblob = malloc(ca_info_blob->len + 1);
332	if(!newblob)
333	return CURLE_OUT_OF_MEMORY;
334	memcpy(newblob, ca_info_blob->data, ca_info_blob->len);
335	newblob[ca_info_blob->len] = 0; /* null terminate */
336	ret = mbedtls_x509_crt_parse(&backend->cacert, newblob,
337	ca_info_blob->len + 1);
338	free(newblob);
339	if(ret<0) {
340	mbedtls_strerror(ret, errorbuf, sizeof(errorbuf));
341	failf(data, "Error importing ca cert blob - mbedTLS: (-0x%04X) %s",
342	-ret, errorbuf);
343	return CURLE_SSL_CERTPROBLEM;
344	}
345	}
346
347	if(ssl_cafile && verifypeer) {
348	#ifdef MBEDTLS_FS_IO
349	ret = mbedtls_x509_crt_parse_file(&backend->cacert, ssl_cafile);
350
351	if(ret<0) {
352	mbedtls_strerror(ret, errorbuf, sizeof(errorbuf));
353	failf(data, "Error reading ca cert file %s - mbedTLS: (-0x%04X) %s",
354	ssl_cafile, -ret, errorbuf);
355	return CURLE_SSL_CACERT_BADFILE;
356	}
357	#else
358	failf(data, "mbedtls: functions that use the filesystem not built in");
359	return CURLE_NOT_BUILT_IN;
360	#endif
361	}
362
363	if(ssl_capath) {
364	#ifdef MBEDTLS_FS_IO
365	ret = mbedtls_x509_crt_parse_path(&backend->cacert, ssl_capath);
366
367	if(ret<0) {
368	mbedtls_strerror(ret, errorbuf, sizeof(errorbuf));
369	failf(data, "Error reading ca cert path %s - mbedTLS: (-0x%04X) %s",
370	ssl_capath, -ret, errorbuf);
371
372	if(verifypeer)
373	return CURLE_SSL_CACERT_BADFILE;
374	}
375	#else
376	failf(data, "mbedtls: functions that use the filesystem not built in");
377	return CURLE_NOT_BUILT_IN;
378	#endif
379	}
380
381	/* Load the client certificate */
382	mbedtls_x509_crt_init(&backend->clicert);
383
384	if(ssl_cert) {
385	#ifdef MBEDTLS_FS_IO
386	ret = mbedtls_x509_crt_parse_file(&backend->clicert, ssl_cert);
387
388	if(ret) {
389	mbedtls_strerror(ret, errorbuf, sizeof(errorbuf));
390	failf(data, "Error reading client cert file %s - mbedTLS: (-0x%04X) %s",
391	ssl_cert, -ret, errorbuf);
392
393	return CURLE_SSL_CERTPROBLEM;
394	}
395	#else
396	failf(data, "mbedtls: functions that use the filesystem not built in");
397	return CURLE_NOT_BUILT_IN;
398	#endif
399	}
400
401	if(ssl_cert_blob) {
402	/* Unfortunately, mbedtls_x509_crt_parse() requires the data to be null
403	terminated even when provided the exact length, forcing us to waste
404	extra memory here. */
405	unsigned char *newblob = malloc(ssl_cert_blob->len + 1);
406	if(!newblob)
407	return CURLE_OUT_OF_MEMORY;
408	memcpy(newblob, ssl_cert_blob->data, ssl_cert_blob->len);
409	newblob[ssl_cert_blob->len] = 0; /* null terminate */
410	ret = mbedtls_x509_crt_parse(&backend->clicert, newblob,
411	ssl_cert_blob->len + 1);
412	free(newblob);
413
414	if(ret) {
415	mbedtls_strerror(ret, errorbuf, sizeof(errorbuf));
416	failf(data, "Error reading private key %s - mbedTLS: (-0x%04X) %s",
417	SSL_SET_OPTION(key), -ret, errorbuf);
418	return CURLE_SSL_CERTPROBLEM;
419	}
420	}
421
422	/* Load the client private key */
423	mbedtls_pk_init(&backend->pk);
424
425	if(SSL_SET_OPTION(key) \|\| SSL_SET_OPTION(key_blob)) {
426	if(SSL_SET_OPTION(key)) {
427	#ifdef MBEDTLS_FS_IO
428	#if MBEDTLS_VERSION_NUMBER >= 0x03000000
429	ret = mbedtls_pk_parse_keyfile(&backend->pk, SSL_SET_OPTION(key),
430	SSL_SET_OPTION(key_passwd),
431	mbedtls_ctr_drbg_random,
432	&backend->ctr_drbg);
433	#else
434	ret = mbedtls_pk_parse_keyfile(&backend->pk, SSL_SET_OPTION(key),
435	SSL_SET_OPTION(key_passwd));
436	#endif
437
438	if(ret) {
439	mbedtls_strerror(ret, errorbuf, sizeof(errorbuf));
440	failf(data, "Error reading private key %s - mbedTLS: (-0x%04X) %s",
441	SSL_SET_OPTION(key), -ret, errorbuf);
442	return CURLE_SSL_CERTPROBLEM;
443	}
444	#else
445	failf(data, "mbedtls: functions that use the filesystem not built in");
446	return CURLE_NOT_BUILT_IN;
447	#endif
448	}
449	else {
450	const struct curl_blob *ssl_key_blob = SSL_SET_OPTION(key_blob);
451	const unsigned char *key_data =
452	(const unsigned char *)ssl_key_blob->data;
453	const char *passwd = SSL_SET_OPTION(key_passwd);
454	#if MBEDTLS_VERSION_NUMBER >= 0x03000000
455	ret = mbedtls_pk_parse_key(&backend->pk, key_data, ssl_key_blob->len,
456	(const unsigned char *)passwd,
457	passwd ? strlen(passwd) : 0,
458	mbedtls_ctr_drbg_random,
459	&backend->ctr_drbg);
460	#else
461	ret = mbedtls_pk_parse_key(&backend->pk, key_data, ssl_key_blob->len,
462	(const unsigned char *)passwd,
463	passwd ? strlen(passwd) : 0);
464	#endif
465
466	if(ret) {
467	mbedtls_strerror(ret, errorbuf, sizeof(errorbuf));
468	failf(data, "Error parsing private key - mbedTLS: (-0x%04X) %s",
469	-ret, errorbuf);
470	return CURLE_SSL_CERTPROBLEM;
471	}
472	}
473
474	if(ret == 0 && !(mbedtls_pk_can_do(&backend->pk, MBEDTLS_PK_RSA) \|\|
475	mbedtls_pk_can_do(&backend->pk, MBEDTLS_PK_ECKEY)))
476	ret = MBEDTLS_ERR_PK_TYPE_MISMATCH;
477	}
478
479	/* Load the CRL */
480	#ifdef MBEDTLS_X509_CRL_PARSE_C
481	mbedtls_x509_crl_init(&backend->crl);
482
483	if(ssl_crlfile) {
484	#ifdef MBEDTLS_FS_IO
485	ret = mbedtls_x509_crl_parse_file(&backend->crl, ssl_crlfile);
486
487	if(ret) {
488	mbedtls_strerror(ret, errorbuf, sizeof(errorbuf));
489	failf(data, "Error reading CRL file %s - mbedTLS: (-0x%04X) %s",
490	ssl_crlfile, -ret, errorbuf);
491
492	return CURLE_SSL_CRL_BADFILE;
493	}
494	#else
495	failf(data, "mbedtls: functions that use the filesystem not built in");
496	return CURLE_NOT_BUILT_IN;
497	#endif
498	}
499	#else
500	if(ssl_crlfile) {
501	failf(data, "mbedtls: crl support not built in");
502	return CURLE_NOT_BUILT_IN;
503	}
504	#endif
505
506	infof(data, "mbedTLS: Connecting to %s:%ld", hostname, port);
507
508	mbedtls_ssl_config_init(&backend->config);
509	ret = mbedtls_ssl_config_defaults(&backend->config,
510	MBEDTLS_SSL_IS_CLIENT,
511	MBEDTLS_SSL_TRANSPORT_STREAM,
512	MBEDTLS_SSL_PRESET_DEFAULT);
513	if(ret) {
514	failf(data, "mbedTLS: ssl_config failed");
515	return CURLE_SSL_CONNECT_ERROR;
516	}
517
518	mbedtls_ssl_init(&backend->ssl);
519	if(mbedtls_ssl_setup(&backend->ssl, &backend->config)) {
520	failf(data, "mbedTLS: ssl_init failed");
521	return CURLE_SSL_CONNECT_ERROR;
522	}
523
524	/* new profile with RSA min key len = 1024 ... */
525	mbedtls_ssl_conf_cert_profile(&backend->config,
526	&mbedtls_x509_crt_profile_fr);
527
528	switch(SSL_CONN_CONFIG(version)) {
529	case CURL_SSLVERSION_DEFAULT:
530	case CURL_SSLVERSION_TLSv1:
531	#if MBEDTLS_VERSION_NUMBER < 0x03000000
532	mbedtls_ssl_conf_min_version(&backend->config, MBEDTLS_SSL_MAJOR_VERSION_3,
533	MBEDTLS_SSL_MINOR_VERSION_1);
534	infof(data, "mbedTLS: Set min SSL version to TLS 1.0");
535	break;
536	#endif
537	case CURL_SSLVERSION_TLSv1_0:
538	case CURL_SSLVERSION_TLSv1_1:
539	case CURL_SSLVERSION_TLSv1_2:
540	case CURL_SSLVERSION_TLSv1_3:
541	{
542	CURLcode result = set_ssl_version_min_max(data, conn, sockindex);
543	if(result != CURLE_OK)
544	return result;
545	break;
546	}
547	default:
548	failf(data, "Unrecognized parameter passed via CURLOPT_SSLVERSION");
549	return CURLE_SSL_CONNECT_ERROR;
550	}
551
552	mbedtls_ssl_conf_authmode(&backend->config, MBEDTLS_SSL_VERIFY_OPTIONAL);
553
554	mbedtls_ssl_conf_rng(&backend->config, mbedtls_ctr_drbg_random,
555	&backend->ctr_drbg);
556	mbedtls_ssl_set_bio(&backend->ssl, &conn->sock[sockindex],
557	mbedtls_net_send,
558	mbedtls_net_recv,
559	NULL /* rev_timeout() */);
560
561	mbedtls_ssl_conf_ciphersuites(&backend->config,
562	mbedtls_ssl_list_ciphersuites());
563
564	#if defined(MBEDTLS_SSL_RENEGOTIATION)
565	mbedtls_ssl_conf_renegotiation(&backend->config,
566	MBEDTLS_SSL_RENEGOTIATION_ENABLED);
567	#endif
568
569	#if defined(MBEDTLS_SSL_SESSION_TICKETS)
570	mbedtls_ssl_conf_session_tickets(&backend->config,
571	MBEDTLS_SSL_SESSION_TICKETS_DISABLED);
572	#endif
573
574	/* Check if there's a cached ID we can/should use here! */
575	if(SSL_SET_OPTION(primary.sessionid)) {
576	void *old_session = NULL;
577
578	Curl_ssl_sessionid_lock(data);
579	if(!Curl_ssl_getsessionid(data, conn,
580	SSL_IS_PROXY() ? TRUE : FALSE,
581	&old_session, NULL, sockindex)) {
582	ret = mbedtls_ssl_set_session(&backend->ssl, old_session);
583	if(ret) {
584	Curl_ssl_sessionid_unlock(data);
585	failf(data, "mbedtls_ssl_set_session returned -0x%x", -ret);
586	return CURLE_SSL_CONNECT_ERROR;
587	}
588	infof(data, "mbedTLS re-using session");
589	}
590	Curl_ssl_sessionid_unlock(data);
591	}
592
593	mbedtls_ssl_conf_ca_chain(&backend->config,
594	&backend->cacert,
595	#ifdef MBEDTLS_X509_CRL_PARSE_C
596	&backend->crl);
597	#else
598	NULL);
599	#endif
600
601	if(SSL_SET_OPTION(key) \|\| SSL_SET_OPTION(key_blob)) {
602	mbedtls_ssl_conf_own_cert(&backend->config,
603	&backend->clicert, &backend->pk);
604	}
605	{
606	char *snihost = Curl_ssl_snihost(data, hostname, NULL);
607	if(!snihost \|\| mbedtls_ssl_set_hostname(&backend->ssl, snihost)) {
608	/* mbedtls_ssl_set_hostname() sets the name to use in CN/SAN checks and
609	the name to set in the SNI extension. So even if curl connects to a
610	host specified as an IP address, this function must be used. */
611	failf(data, "Failed to set SNI");
612	return CURLE_SSL_CONNECT_ERROR;
613	}
614	}
615
616	#ifdef HAS_ALPN
617	if(conn->bits.tls_enable_alpn) {
618	const char **p = &backend->protocols[0];
619	#ifdef USE_HTTP2
620	if(data->state.httpwant >= CURL_HTTP_VERSION_2)
621	*p++ = ALPN_H2;
622	#endif
623	*p++ = ALPN_HTTP_1_1;
624	*p = NULL;
625	/* this function doesn't clone the protocols array, which is why we need
626	to keep it around */
627	if(mbedtls_ssl_conf_alpn_protocols(&backend->config,
628	&backend->protocols[0])) {
629	failf(data, "Failed setting ALPN protocols");
630	return CURLE_SSL_CONNECT_ERROR;
631	}
632	for(p = &backend->protocols[0]; *p; ++p)
633	infof(data, VTLS_INFOF_ALPN_OFFER_1STR, *p);
634	}
635	#endif
636
637	#ifdef MBEDTLS_DEBUG
638	/* In order to make that work in mbedtls MBEDTLS_DEBUG_C must be defined. */
639	mbedtls_ssl_conf_dbg(&backend->config, mbed_debug, data);
640	/* - 0 No debug
641	* - 1 Error
642	* - 2 State change
643	* - 3 Informational
644	* - 4 Verbose
645	*/
646	mbedtls_debug_set_threshold(4);
647	#endif
648
649	/* give application a chance to interfere with mbedTLS set up. */
650	if(data->set.ssl.fsslctx) {
651	ret = (*data->set.ssl.fsslctx)(data, &backend->config,
652	data->set.ssl.fsslctxp);
653	if(ret) {
654	failf(data, "error signaled by ssl ctx callback");
655	return ret;
656	}
657	}
658
659	connssl->connecting_state = ssl_connect_2;
660
661	return CURLE_OK;
662	}
663
664	static CURLcode
665	mbed_connect_step2(struct Curl_easy data, struct connectdata conn,
666	int sockindex)
667	{
668	int ret;
669	struct ssl_connect_data *connssl = &conn->ssl[sockindex];
670	struct ssl_backend_data *backend = connssl->backend;
671	const mbedtls_x509_crt *peercert;
672	const char * const pinnedpubkey = SSL_PINNED_PUB_KEY();
673
674	DEBUGASSERT(backend);
675
676	conn->recv[sockindex] = mbed_recv;
677	conn->send[sockindex] = mbed_send;
678
679	ret = mbedtls_ssl_handshake(&backend->ssl);
680
681	if(ret == MBEDTLS_ERR_SSL_WANT_READ) {
682	connssl->connecting_state = ssl_connect_2_reading;
683	return CURLE_OK;
684	}
685	else if(ret == MBEDTLS_ERR_SSL_WANT_WRITE) {
686	connssl->connecting_state = ssl_connect_2_writing;
687	return CURLE_OK;
688	}
689	else if(ret) {
690	char errorbuf[128];
691	mbedtls_strerror(ret, errorbuf, sizeof(errorbuf));
692	failf(data, "ssl_handshake returned - mbedTLS: (-0x%04X) %s",
693	-ret, errorbuf);
694	return CURLE_SSL_CONNECT_ERROR;
695	}
696
697	infof(data, "mbedTLS: Handshake complete, cipher is %s",
698	mbedtls_ssl_get_ciphersuite(&backend->ssl));
699
700	ret = mbedtls_ssl_get_verify_result(&backend->ssl);
701
702	if(!SSL_CONN_CONFIG(verifyhost))
703	/* Ignore hostname errors if verifyhost is disabled */
704	ret &= ~MBEDTLS_X509_BADCERT_CN_MISMATCH;
705
706	if(ret && SSL_CONN_CONFIG(verifypeer)) {
707	if(ret & MBEDTLS_X509_BADCERT_EXPIRED)
708	failf(data, "Cert verify failed: BADCERT_EXPIRED");
709
710	else if(ret & MBEDTLS_X509_BADCERT_REVOKED)
711	failf(data, "Cert verify failed: BADCERT_REVOKED");
712
713	else if(ret & MBEDTLS_X509_BADCERT_CN_MISMATCH)
714	failf(data, "Cert verify failed: BADCERT_CN_MISMATCH");
715
716	else if(ret & MBEDTLS_X509_BADCERT_NOT_TRUSTED)
717	failf(data, "Cert verify failed: BADCERT_NOT_TRUSTED");
718
719	else if(ret & MBEDTLS_X509_BADCERT_FUTURE)
720	failf(data, "Cert verify failed: BADCERT_FUTURE");
721
722	return CURLE_PEER_FAILED_VERIFICATION;
723	}
724
725	peercert = mbedtls_ssl_get_peer_cert(&backend->ssl);
726
727	if(peercert && data->set.verbose) {
728	const size_t bufsize = 16384;
729	char *buffer = malloc(bufsize);
730
731	if(!buffer)
732	return CURLE_OUT_OF_MEMORY;
733
734	if(mbedtls_x509_crt_info(buffer, bufsize, "* ", peercert) > 0)
735	infof(data, "Dumping cert info: %s", buffer);
736	else
737	infof(data, "Unable to dump certificate information");
738
739	free(buffer);
740	}
741
742	if(pinnedpubkey) {
743	int size;
744	CURLcode result;
745	mbedtls_x509_crt *p = NULL;
746	unsigned char *pubkey = NULL;
747
748	#if MBEDTLS_VERSION_NUMBER == 0x03000000
749	if(!peercert \|\| !peercert->MBEDTLS_PRIVATE(raw).MBEDTLS_PRIVATE(p) \|\|
750	!peercert->MBEDTLS_PRIVATE(raw).MBEDTLS_PRIVATE(len)) {
751	#else
752	if(!peercert \|\| !peercert->raw.p \|\| !peercert->raw.len) {
753	#endif
754	failf(data, "Failed due to missing peer certificate");
755	return CURLE_SSL_PINNEDPUBKEYNOTMATCH;
756	}
757
758	p = calloc(1, sizeof(*p));
759
760	if(!p)
761	return CURLE_OUT_OF_MEMORY;
762
763	pubkey = malloc(PUB_DER_MAX_BYTES);
764
765	if(!pubkey) {
766	result = CURLE_OUT_OF_MEMORY;
767	goto pinnedpubkey_error;
768	}
769
770	mbedtls_x509_crt_init(p);
771
772	/* Make a copy of our const peercert because mbedtls_pk_write_pubkey_der
773	needs a non-const key, for now.
774	https://github.com/ARMmbed/mbedtls/issues/396 */
775	#if MBEDTLS_VERSION_NUMBER == 0x03000000
776	if(mbedtls_x509_crt_parse_der(p,
777	peercert->MBEDTLS_PRIVATE(raw).MBEDTLS_PRIVATE(p),
778	peercert->MBEDTLS_PRIVATE(raw).MBEDTLS_PRIVATE(len))) {
779	#else
780	if(mbedtls_x509_crt_parse_der(p, peercert->raw.p, peercert->raw.len)) {
781	#endif
782	failf(data, "Failed copying peer certificate");
783	result = CURLE_SSL_PINNEDPUBKEYNOTMATCH;
784	goto pinnedpubkey_error;
785	}
786
787	#if MBEDTLS_VERSION_NUMBER == 0x03000000
788	size = mbedtls_pk_write_pubkey_der(&p->MBEDTLS_PRIVATE(pk), pubkey,
789	PUB_DER_MAX_BYTES);
790	#else
791	size = mbedtls_pk_write_pubkey_der(&p->pk, pubkey, PUB_DER_MAX_BYTES);
792	#endif
793
794	if(size <= 0) {
795	failf(data, "Failed copying public key from peer certificate");
796	result = CURLE_SSL_PINNEDPUBKEYNOTMATCH;
797	goto pinnedpubkey_error;
798	}
799
800	/* mbedtls_pk_write_pubkey_der writes data at the end of the buffer. */
801	result = Curl_pin_peer_pubkey(data,
802	pinnedpubkey,
803	&pubkey[PUB_DER_MAX_BYTES - size], size);
804	pinnedpubkey_error:
805	mbedtls_x509_crt_free(p);
806	free(p);
807	free(pubkey);
808	if(result) {
809	return result;
810	}
811	}
812
813	#ifdef HAS_ALPN
814	if(conn->bits.tls_enable_alpn) {
815	const char *next_protocol = mbedtls_ssl_get_alpn_protocol(&backend->ssl);
816
817	if(next_protocol) {
818	infof(data, VTLS_INFOF_ALPN_ACCEPTED_1STR, next_protocol);
819	#ifdef USE_HTTP2
820	if(!strncmp(next_protocol, ALPN_H2, ALPN_H2_LENGTH) &&
821	!next_protocol[ALPN_H2_LENGTH]) {
822	conn->negnpn = CURL_HTTP_VERSION_2;
823	}
824	else
825	#endif
826	if(!strncmp(next_protocol, ALPN_HTTP_1_1, ALPN_HTTP_1_1_LENGTH) &&
827	!next_protocol[ALPN_HTTP_1_1_LENGTH]) {
828	conn->negnpn = CURL_HTTP_VERSION_1_1;
829	}
830	}
831	else {
832	infof(data, VTLS_INFOF_NO_ALPN);
833	}
834	Curl_multiuse_state(data, conn->negnpn == CURL_HTTP_VERSION_2 ?
835	BUNDLE_MULTIPLEX : BUNDLE_NO_MULTIUSE);
836	}
837	#endif
838
839	connssl->connecting_state = ssl_connect_3;
840	infof(data, "SSL connected");
841
842	return CURLE_OK;
843	}
844
845	static CURLcode
846	mbed_connect_step3(struct Curl_easy data, struct connectdata conn,
847	int sockindex)
848	{
849	CURLcode retcode = CURLE_OK;
850	struct ssl_connect_data *connssl = &conn->ssl[sockindex];
851	struct ssl_backend_data *backend = connssl->backend;
852
853	DEBUGASSERT(ssl_connect_3 == connssl->connecting_state);
854	DEBUGASSERT(backend);
855
856	if(SSL_SET_OPTION(primary.sessionid)) {
857	int ret;
858	mbedtls_ssl_session *our_ssl_sessionid;
859	void *old_ssl_sessionid = NULL;
860	bool isproxy = SSL_IS_PROXY() ? TRUE : FALSE;
861	bool added = FALSE;
862
863	our_ssl_sessionid = malloc(sizeof(mbedtls_ssl_session));
864	if(!our_ssl_sessionid)
865	return CURLE_OUT_OF_MEMORY;
866
867	mbedtls_ssl_session_init(our_ssl_sessionid);
868
869	ret = mbedtls_ssl_get_session(&backend->ssl, our_ssl_sessionid);
870	if(ret) {
871	if(ret != MBEDTLS_ERR_SSL_ALLOC_FAILED)
872	mbedtls_ssl_session_free(our_ssl_sessionid);
873	free(our_ssl_sessionid);
874	failf(data, "mbedtls_ssl_get_session returned -0x%x", -ret);
875	return CURLE_SSL_CONNECT_ERROR;
876	}
877
878	/* If there's already a matching session in the cache, delete it */
879	Curl_ssl_sessionid_lock(data);
880	if(!Curl_ssl_getsessionid(data, conn, isproxy, &old_ssl_sessionid, NULL,
881	sockindex))
882	Curl_ssl_delsessionid(data, old_ssl_sessionid);
883
884	retcode = Curl_ssl_addsessionid(data, conn, isproxy, our_ssl_sessionid,
885	0, sockindex, &added);
886	Curl_ssl_sessionid_unlock(data);
887	if(!added) {
888	mbedtls_ssl_session_free(our_ssl_sessionid);
889	free(our_ssl_sessionid);
890	}
891	if(retcode) {
892	failf(data, "failed to store ssl session");
893	return retcode;
894	}
895	}
896
897	connssl->connecting_state = ssl_connect_done;
898
899	return CURLE_OK;
900	}
901
902	static ssize_t mbed_send(struct Curl_easy *data, int sockindex,
903	const void *mem, size_t len,
904	CURLcode *curlcode)
905	{
906	struct connectdata *conn = data->conn;
907	struct ssl_connect_data *connssl = &conn->ssl[sockindex];
908	struct ssl_backend_data *backend = connssl->backend;
909	int ret = -1;
910
911	DEBUGASSERT(backend);
912
913	ret = mbedtls_ssl_write(&backend->ssl, (unsigned char *)mem, len);
914
915	if(ret < 0) {
916	*curlcode = (ret == MBEDTLS_ERR_SSL_WANT_WRITE) ?
917	CURLE_AGAIN : CURLE_SEND_ERROR;
918	ret = -1;
919	}
920
921	return ret;
922	}
923
924	static void mbedtls_close_all(struct Curl_easy *data)
925	{
926	(void)data;
927	}
928
929	static void mbedtls_close(struct Curl_easy *data,
930	struct connectdata *conn, int sockindex)
931	{
932	struct ssl_connect_data *connssl = &conn->ssl[sockindex];
933	struct ssl_backend_data *backend = connssl->backend;
934	char buf[32];
935	(void) data;
936
937	DEBUGASSERT(backend);
938
939	/* Maybe the server has already sent a close notify alert.
940	Read it to avoid an RST on the TCP connection. */
941	(void)mbedtls_ssl_read(&backend->ssl, (unsigned char *)buf, sizeof(buf));
942
943	mbedtls_pk_free(&backend->pk);
944	mbedtls_x509_crt_free(&backend->clicert);
945	mbedtls_x509_crt_free(&backend->cacert);
946	#ifdef MBEDTLS_X509_CRL_PARSE_C
947	mbedtls_x509_crl_free(&backend->crl);
948	#endif
949	mbedtls_ssl_config_free(&backend->config);
950	mbedtls_ssl_free(&backend->ssl);
951	mbedtls_ctr_drbg_free(&backend->ctr_drbg);
952	#ifndef THREADING_SUPPORT
953	mbedtls_entropy_free(&backend->entropy);
954	#endif /* THREADING_SUPPORT */
955	}
956
957	static ssize_t mbed_recv(struct Curl_easy *data, int num,
958	char *buf, size_t buffersize,
959	CURLcode *curlcode)
960	{
961	struct connectdata *conn = data->conn;
962	struct ssl_connect_data *connssl = &conn->ssl[num];
963	struct ssl_backend_data *backend = connssl->backend;
964	int ret = -1;
965	ssize_t len = -1;
966
967	DEBUGASSERT(backend);
968
969	ret = mbedtls_ssl_read(&backend->ssl, (unsigned char *)buf,
970	buffersize);
971
972	if(ret <= 0) {
973	if(ret == MBEDTLS_ERR_SSL_PEER_CLOSE_NOTIFY)
974	return 0;
975
976	*curlcode = (ret == MBEDTLS_ERR_SSL_WANT_READ) ?
977	CURLE_AGAIN : CURLE_RECV_ERROR;
978	return -1;
979	}
980
981	len = ret;
982
983	return len;
984	}
985
986	static void mbedtls_session_free(void *ptr)
987	{
988	mbedtls_ssl_session_free(ptr);
989	free(ptr);
990	}
991
992	static size_t mbedtls_version(char *buffer, size_t size)
993	{
994	#ifdef MBEDTLS_VERSION_C
995	/* if mbedtls_version_get_number() is available it is better */
996	unsigned int version = mbedtls_version_get_number();
997	return msnprintf(buffer, size, "mbedTLS/%u.%u.%u", version>>24,
998	(version>>16)&0xff, (version>>8)&0xff);
999	#else
1000	return msnprintf(buffer, size, "mbedTLS/%s", MBEDTLS_VERSION_STRING);
1001	#endif
1002	}
1003
1004	static CURLcode mbedtls_random(struct Curl_easy *data,
1005	unsigned char *entropy, size_t length)
1006	{
1007	#if defined(MBEDTLS_CTR_DRBG_C)
1008	int ret = -1;
1009	char errorbuf[128];
1010	mbedtls_entropy_context ctr_entropy;
1011	mbedtls_ctr_drbg_context ctr_drbg;
1012	mbedtls_entropy_init(&ctr_entropy);
1013	mbedtls_ctr_drbg_init(&ctr_drbg);
1014
1015	ret = mbedtls_ctr_drbg_seed(&ctr_drbg, mbedtls_entropy_func,
1016	&ctr_entropy, NULL, 0);
1017
1018	if(ret) {
1019	mbedtls_strerror(ret, errorbuf, sizeof(errorbuf));
1020	failf(data, "mbedtls_ctr_drbg_seed returned (-0x%04X) %s",
1021	-ret, errorbuf);
1022	}
1023	else {
1024	ret = mbedtls_ctr_drbg_random(&ctr_drbg, entropy, length);
1025
1026	if(ret) {
1027	mbedtls_strerror(ret, errorbuf, sizeof(errorbuf));
1028	failf(data, "mbedtls_ctr_drbg_random returned (-0x%04X) %s",
1029	-ret, errorbuf);
1030	}
1031	}
1032
1033	mbedtls_ctr_drbg_free(&ctr_drbg);
1034	mbedtls_entropy_free(&ctr_entropy);
1035
1036	return ret == 0 ? CURLE_OK : CURLE_FAILED_INIT;
1037	#elif defined(MBEDTLS_HAVEGE_C)
1038	mbedtls_havege_state hs;
1039	mbedtls_havege_init(&hs);
1040	mbedtls_havege_random(&hs, entropy, length);
1041	mbedtls_havege_free(&hs);
1042	return CURLE_OK;
1043	#else
1044	return CURLE_NOT_BUILT_IN;
1045	#endif
1046	}
1047
1048	static CURLcode
1049	mbed_connect_common(struct Curl_easy *data,
1050	struct connectdata *conn,
1051	int sockindex,
1052	bool nonblocking,
1053	bool *done)
1054	{
1055	CURLcode retcode;
1056	struct ssl_connect_data *connssl = &conn->ssl[sockindex];
1057	curl_socket_t sockfd = conn->sock[sockindex];
1058	timediff_t timeout_ms;
1059	int what;
1060
1061	/* check if the connection has already been established */
1062	if(ssl_connection_complete == connssl->state) {
1063	*done = TRUE;
1064	return CURLE_OK;
1065	}
1066
1067	if(ssl_connect_1 == connssl->connecting_state) {
1068	/* Find out how much more time we're allowed */
1069	timeout_ms = Curl_timeleft(data, NULL, TRUE);
1070
1071	if(timeout_ms < 0) {
1072	/* no need to continue if time already is up */
1073	failf(data, "SSL connection timeout");
1074	return CURLE_OPERATION_TIMEDOUT;
1075	}
1076	retcode = mbed_connect_step1(data, conn, sockindex);
1077	if(retcode)
1078	return retcode;
1079	}
1080
1081	while(ssl_connect_2 == connssl->connecting_state \|\|
1082	ssl_connect_2_reading == connssl->connecting_state \|\|
1083	ssl_connect_2_writing == connssl->connecting_state) {
1084
1085	/* check allowed time left */
1086	timeout_ms = Curl_timeleft(data, NULL, TRUE);
1087
1088	if(timeout_ms < 0) {
1089	/* no need to continue if time already is up */
1090	failf(data, "SSL connection timeout");
1091	return CURLE_OPERATION_TIMEDOUT;
1092	}
1093
1094	/* if ssl is expecting something, check if it's available. */
1095	if(connssl->connecting_state == ssl_connect_2_reading
1096	\|\| connssl->connecting_state == ssl_connect_2_writing) {
1097
1098	curl_socket_t writefd = ssl_connect_2_writing ==
1099	connssl->connecting_state?sockfd:CURL_SOCKET_BAD;
1100	curl_socket_t readfd = ssl_connect_2_reading ==
1101	connssl->connecting_state?sockfd:CURL_SOCKET_BAD;
1102
1103	what = Curl_socket_check(readfd, CURL_SOCKET_BAD, writefd,
1104	nonblocking ? 0 : timeout_ms);
1105	if(what < 0) {
1106	/* fatal error */
1107	failf(data, "select/poll on SSL socket, errno: %d", SOCKERRNO);
1108	return CURLE_SSL_CONNECT_ERROR;
1109	}
1110	else if(0 == what) {
1111	if(nonblocking) {
1112	*done = FALSE;
1113	return CURLE_OK;
1114	}
1115	else {
1116	/* timeout */
1117	failf(data, "SSL connection timeout");
1118	return CURLE_OPERATION_TIMEDOUT;
1119	}
1120	}
1121	/* socket is readable or writable */
1122	}
1123
1124	/* Run transaction, and return to the caller if it failed or if
1125	* this connection is part of a multi handle and this loop would
1126	* execute again. This permits the owner of a multi handle to
1127	* abort a connection attempt before step2 has completed while
1128	* ensuring that a client using select() or epoll() will always
1129	* have a valid fdset to wait on.
1130	*/
1131	retcode = mbed_connect_step2(data, conn, sockindex);
1132	if(retcode \|\| (nonblocking &&
1133	(ssl_connect_2 == connssl->connecting_state \|\|
1134	ssl_connect_2_reading == connssl->connecting_state \|\|
1135	ssl_connect_2_writing == connssl->connecting_state)))
1136	return retcode;
1137
1138	} /* repeat step2 until all transactions are done. */
1139
1140	if(ssl_connect_3 == connssl->connecting_state) {
1141	retcode = mbed_connect_step3(data, conn, sockindex);
1142	if(retcode)
1143	return retcode;
1144	}
1145
1146	if(ssl_connect_done == connssl->connecting_state) {
1147	connssl->state = ssl_connection_complete;
1148	conn->recv[sockindex] = mbed_recv;
1149	conn->send[sockindex] = mbed_send;
1150	*done = TRUE;
1151	}
1152	else
1153	*done = FALSE;
1154
1155	/* Reset our connect state machine */
1156	connssl->connecting_state = ssl_connect_1;
1157
1158	return CURLE_OK;
1159	}
1160
1161	static CURLcode mbedtls_connect_nonblocking(struct Curl_easy *data,
1162	struct connectdata *conn,
1163	int sockindex, bool *done)
1164	{
1165	return mbed_connect_common(data, conn, sockindex, TRUE, done);
1166	}
1167
1168
1169	static CURLcode mbedtls_connect(struct Curl_easy *data,
1170	struct connectdata *conn, int sockindex)
1171	{
1172	CURLcode retcode;
1173	bool done = FALSE;
1174
1175	retcode = mbed_connect_common(data, conn, sockindex, FALSE, &done);
1176	if(retcode)
1177	return retcode;
1178
1179	DEBUGASSERT(done);
1180
1181	return CURLE_OK;
1182	}
1183
1184	/*
1185	* return 0 error initializing SSL
1186	* return 1 SSL initialized successfully
1187	*/
1188	static int mbedtls_init(void)
1189	{
1190	return Curl_mbedtlsthreadlock_thread_setup();
1191	}
1192
1193	static void mbedtls_cleanup(void)
1194	{
1195	(void)Curl_mbedtlsthreadlock_thread_cleanup();
1196	}
1197
1198	static bool mbedtls_data_pending(const struct connectdata *conn,
1199	int sockindex)
1200	{
1201	const struct ssl_connect_data *connssl = &conn->ssl[sockindex];
1202	struct ssl_backend_data *backend = connssl->backend;
1203	DEBUGASSERT(backend);
1204	return mbedtls_ssl_get_bytes_avail(&backend->ssl) != 0;
1205	}
1206
1207	static CURLcode mbedtls_sha256sum(const unsigned char *input,
1208	size_t inputlen,
1209	unsigned char *sha256sum,
1210	size_t sha256len UNUSED_PARAM)
1211	{
1212	/* TODO: explain this for different mbedtls 2.x vs 3 version */
1213	(void)sha256len;
1214	#if MBEDTLS_VERSION_NUMBER < 0x02070000
1215	mbedtls_sha256(input, inputlen, sha256sum, 0);
1216	#else
1217	/* returns 0 on success, otherwise failure */
1218	#if MBEDTLS_VERSION_NUMBER >= 0x03000000
1219	if(mbedtls_sha256(input, inputlen, sha256sum, 0) != 0)
1220	#else
1221	if(mbedtls_sha256_ret(input, inputlen, sha256sum, 0) != 0)
1222	#endif
1223	return CURLE_BAD_FUNCTION_ARGUMENT;
1224	#endif
1225	return CURLE_OK;
1226	}
1227
1228	static void mbedtls_get_internals(struct ssl_connect_data connssl,
1229	CURLINFO info UNUSED_PARAM)
1230	{
1231	struct ssl_backend_data *backend = connssl->backend;
1232	(void)info;
1233	DEBUGASSERT(backend);
1234	return &backend->ssl;
1235	}
1236
1237	const struct Curl_ssl Curl_ssl_mbedtls = {
1238	{ CURLSSLBACKEND_MBEDTLS, "mbedtls" }, /* info */
1239
1240	SSLSUPP_CA_PATH \|
1241	SSLSUPP_CAINFO_BLOB \|
1242	SSLSUPP_PINNEDPUBKEY \|
1243	SSLSUPP_SSL_CTX,
1244
1245	sizeof(struct ssl_backend_data),
1246
1247	mbedtls_init, /* init */
1248	mbedtls_cleanup, /* cleanup */
1249	mbedtls_version, /* version */
1250	Curl_none_check_cxn, /* check_cxn */
1251	Curl_none_shutdown, /* shutdown */
1252	mbedtls_data_pending, /* data_pending */
1253	mbedtls_random, /* random */
1254	Curl_none_cert_status_request, /* cert_status_request */
1255	mbedtls_connect, /* connect */
1256	mbedtls_connect_nonblocking, /* connect_nonblocking */
1257	Curl_ssl_getsock, /* getsock */
1258	mbedtls_get_internals, /* get_internals */
1259	mbedtls_close, /* close_one */
1260	mbedtls_close_all, /* close_all */
1261	mbedtls_session_free, /* session_free */
1262	Curl_none_set_engine, /* set_engine */
1263	Curl_none_set_engine_default, /* set_engine_default */
1264	Curl_none_engines_list, /* engines_list */
1265	Curl_none_false_start, /* false_start */
1266	mbedtls_sha256sum, /* sha256sum */
1267	NULL, /* associate_connection */
1268	NULL /* disassociate_connection */
1269	};
1270
1271	#endif /* USE_MBEDTLS */

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source: vbox/trunk/src/libs/curl-7.83.1/lib/vtls/mbedtls.c@ 95312

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