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Concentrate deprecated libssl API usage in one file
[thirdparty/openssl.git] / ssl / t1_lib.c
CommitLineData
846e33c7 1/*
33388b44 2 * Copyright 1995-2020 The OpenSSL Project Authors. All Rights Reserved.
f1fd4544 3 *
2c18d164 4 * Licensed under the Apache License 2.0 (the "License"). You may not use
846e33c7
RS		 5 * this file except in compliance with the License. You can obtain a copy
6 * in the file LICENSE in the source distribution or at
7 * https://www.openssl.org/source/license.html
f1fd4544 8 */
58964a49
RE		 9
10#include <stdio.h>
aa474d1f 11#include <stdlib.h>
ec577822 12#include <openssl/objects.h>
6434abbf
DSH		 13#include <openssl/evp.h>
14#include <openssl/hmac.h>
a76ce286 15#include <openssl/core_names.h>
67c8e7f4 16#include <openssl/ocsp.h>
5951e840
MC		 17#include <openssl/conf.h>
18#include <openssl/x509v3.h>
3c27208f
RS		 19#include <openssl/dh.h>
20#include <openssl/bn.h>
9d2d857f 21#include <openssl/provider.h>
677963e5 22#include "internal/nelem.h"
c2041da8 23#include "internal/evp.h"
48e971dd 24#include "internal/tlsgroups.h"
706457b7 25#include "ssl_local.h"
3c27208f 26#include <openssl/ct.h>
58964a49 27
5235ef44 28static const SIGALG_LOOKUP *find_sig_alg(SSL *s, X509 *x, EVP_PKEY *pkey);
b0031e5d 29static int tls12_sigalg_allowed(const SSL *s, int op, const SIGALG_LOOKUP *lu);
5235ef44 30
0f113f3e
MC		 31SSL3_ENC_METHOD const TLSv1_enc_data = {
32 tls1_enc,
33 tls1_mac,
34 tls1_setup_key_block,
35 tls1_generate_master_secret,
36 tls1_change_cipher_state,
37 tls1_final_finish_mac,
0f113f3e
MC		 38 TLS_MD_CLIENT_FINISH_CONST, TLS_MD_CLIENT_FINISH_CONST_SIZE,
39 TLS_MD_SERVER_FINISH_CONST, TLS_MD_SERVER_FINISH_CONST_SIZE,
40 tls1_alert_code,
41 tls1_export_keying_material,
42 0,
a29fa98c 43 ssl3_set_handshake_header,
2c7b4dbc 44 tls_close_construct_packet,
0f113f3e
MC		 45 ssl3_handshake_write
46};
47
48SSL3_ENC_METHOD const TLSv1_1_enc_data = {
49 tls1_enc,
50 tls1_mac,
51 tls1_setup_key_block,
52 tls1_generate_master_secret,
53 tls1_change_cipher_state,
54 tls1_final_finish_mac,
0f113f3e
MC		 55 TLS_MD_CLIENT_FINISH_CONST, TLS_MD_CLIENT_FINISH_CONST_SIZE,
56 TLS_MD_SERVER_FINISH_CONST, TLS_MD_SERVER_FINISH_CONST_SIZE,
57 tls1_alert_code,
58 tls1_export_keying_material,
59 SSL_ENC_FLAG_EXPLICIT_IV,
a29fa98c 60 ssl3_set_handshake_header,
2c7b4dbc 61 tls_close_construct_packet,
0f113f3e
MC		 62 ssl3_handshake_write
63};
64
65SSL3_ENC_METHOD const TLSv1_2_enc_data = {
66 tls1_enc,
67 tls1_mac,
68 tls1_setup_key_block,
69 tls1_generate_master_secret,
70 tls1_change_cipher_state,
71 tls1_final_finish_mac,
0f113f3e
MC		 72 TLS_MD_CLIENT_FINISH_CONST, TLS_MD_CLIENT_FINISH_CONST_SIZE,
73 TLS_MD_SERVER_FINISH_CONST, TLS_MD_SERVER_FINISH_CONST_SIZE,
74 tls1_alert_code,
75 tls1_export_keying_material,
76 SSL_ENC_FLAG_EXPLICIT_IV | SSL_ENC_FLAG_SIGALGS | SSL_ENC_FLAG_SHA256_PRF
77 | SSL_ENC_FLAG_TLS1_2_CIPHERS,
a29fa98c 78 ssl3_set_handshake_header,
2c7b4dbc 79 tls_close_construct_packet,
0f113f3e
MC		 80 ssl3_handshake_write
81};
58964a49 82
582a17d6 83SSL3_ENC_METHOD const TLSv1_3_enc_data = {
bebc0c7d 84 tls13_enc,
582a17d6 85 tls1_mac,
92760c21
MC		 86 tls13_setup_key_block,
87 tls13_generate_master_secret,
88 tls13_change_cipher_state,
89 tls13_final_finish_mac,
582a17d6
MC		 90 TLS_MD_CLIENT_FINISH_CONST, TLS_MD_CLIENT_FINISH_CONST_SIZE,
91 TLS_MD_SERVER_FINISH_CONST, TLS_MD_SERVER_FINISH_CONST_SIZE,
04904312 92 tls13_alert_code,
0ca8d1ec 93 tls13_export_keying_material,
bebc0c7d 94 SSL_ENC_FLAG_SIGALGS | SSL_ENC_FLAG_SHA256_PRF,
582a17d6
MC		 95 ssl3_set_handshake_header,
96 tls_close_construct_packet,
97 ssl3_handshake_write
98};
99
f3b656b2 100long tls1_default_timeout(void)
0f113f3e
MC		 101{
102 /*
103 * 2 hours, the 24 hours mentioned in the TLSv1 spec is way too long for
104 * http, the cache would over fill
105 */
106 return (60 * 60 * 2);
107}
58964a49 108
6b691a5c 109int tls1_new(SSL *s)
0f113f3e
MC		 110{
111 if (!ssl3_new(s))
b77f3ed1
MC		 112 return 0;
113 if (!s->method->ssl_clear(s))
114 return 0;
115
116 return 1;
0f113f3e 117}
58964a49 118
6b691a5c 119void tls1_free(SSL *s)
0f113f3e 120{
aff8c126 121 OPENSSL_free(s->ext.session_ticket);
0f113f3e
MC		 122 ssl3_free(s);
123}
58964a49 124
b77f3ed1 125int tls1_clear(SSL *s)
0f113f3e 126{
b77f3ed1
MC		 127 if (!ssl3_clear(s))
128 return 0;
129
4fa52141 130 if (s->method->version == TLS_ANY_VERSION)
5c587fb6 131 s->version = TLS_MAX_VERSION_INTERNAL;
4fa52141
VD		 132 else
133 s->version = s->method->version;
b77f3ed1
MC		 134
135 return 1;
0f113f3e 136}
58964a49 137
65dc5c3c 138#if !defined(OPENSSL_NO_DH) || !defined(OPENSSL_NO_EC)
9d2d857f
MC		 139/* Legacy NID to group_id mapping. Only works for groups we know about */
140static struct {
141 int nid;
142 uint16_t group_id;
143} nid_to_group[] = {
48e971dd
MC		 144 {NID_sect163k1, OSSL_TLS_GROUP_ID_sect163k1},
145 {NID_sect163r1, OSSL_TLS_GROUP_ID_sect163r1},
146 {NID_sect163r2, OSSL_TLS_GROUP_ID_sect163r2},
147 {NID_sect193r1, OSSL_TLS_GROUP_ID_sect193r1},
148 {NID_sect193r2, OSSL_TLS_GROUP_ID_sect193r2},
149 {NID_sect233k1, OSSL_TLS_GROUP_ID_sect233k1},
150 {NID_sect233r1, OSSL_TLS_GROUP_ID_sect233r1},
151 {NID_sect239k1, OSSL_TLS_GROUP_ID_sect239k1},
152 {NID_sect283k1, OSSL_TLS_GROUP_ID_sect283k1},
153 {NID_sect283r1, OSSL_TLS_GROUP_ID_sect283r1},
154 {NID_sect409k1, OSSL_TLS_GROUP_ID_sect409k1},
155 {NID_sect409r1, OSSL_TLS_GROUP_ID_sect409r1},
156 {NID_sect571k1, OSSL_TLS_GROUP_ID_sect571k1},
157 {NID_sect571r1, OSSL_TLS_GROUP_ID_sect571r1},
158 {NID_secp160k1, OSSL_TLS_GROUP_ID_secp160k1},
159 {NID_secp160r1, OSSL_TLS_GROUP_ID_secp160r1},
160 {NID_secp160r2, OSSL_TLS_GROUP_ID_secp160r2},
161 {NID_secp192k1, OSSL_TLS_GROUP_ID_secp192k1},
162 {NID_X9_62_prime192v1, OSSL_TLS_GROUP_ID_secp192r1},
163 {NID_secp224k1, OSSL_TLS_GROUP_ID_secp224k1},
164 {NID_secp224r1, OSSL_TLS_GROUP_ID_secp224r1},
165 {NID_secp256k1, OSSL_TLS_GROUP_ID_secp256k1},
166 {NID_X9_62_prime256v1, OSSL_TLS_GROUP_ID_secp256r1},
167 {NID_secp384r1, OSSL_TLS_GROUP_ID_secp384r1},
168 {NID_secp521r1, OSSL_TLS_GROUP_ID_secp521r1},
169 {NID_brainpoolP256r1, OSSL_TLS_GROUP_ID_brainpoolP256r1},
170 {NID_brainpoolP384r1, OSSL_TLS_GROUP_ID_brainpoolP384r1},
171 {NID_brainpoolP512r1, OSSL_TLS_GROUP_ID_brainpoolP512r1},
172 {EVP_PKEY_X25519, OSSL_TLS_GROUP_ID_x25519},
173 {EVP_PKEY_X448, OSSL_TLS_GROUP_ID_x448},
9d2d857f
MC		 174 {NID_id_tc26_gost_3410_2012_256_paramSetA, 0x0022},
175 {NID_id_tc26_gost_3410_2012_256_paramSetB, 0x0023},
176 {NID_id_tc26_gost_3410_2012_256_paramSetC, 0x0024},
177 {NID_id_tc26_gost_3410_2012_256_paramSetD, 0x0025},
178 {NID_id_tc26_gost_3410_2012_512_paramSetA, 0x0026},
179 {NID_id_tc26_gost_3410_2012_512_paramSetB, 0x0027},
180 {NID_id_tc26_gost_3410_2012_512_paramSetC, 0x0028},
48e971dd
MC		 181 {NID_ffdhe2048, OSSL_TLS_GROUP_ID_ffdhe2048},
182 {NID_ffdhe3072, OSSL_TLS_GROUP_ID_ffdhe3072},
183 {NID_ffdhe4096, OSSL_TLS_GROUP_ID_ffdhe4096},
184 {NID_ffdhe6144, OSSL_TLS_GROUP_ID_ffdhe6144},
185 {NID_ffdhe8192, OSSL_TLS_GROUP_ID_ffdhe8192}
0f113f3e 186};
65dc5c3c 187#endif
0f113f3e 188
dbc6268f 189#ifndef OPENSSL_NO_EC
0f113f3e
MC		 190static const unsigned char ecformats_default[] = {
191 TLSEXT_ECPOINTFORMAT_uncompressed,
192 TLSEXT_ECPOINTFORMAT_ansiX962_compressed_prime,
193 TLSEXT_ECPOINTFORMAT_ansiX962_compressed_char2
194};
65dc5c3c 195#endif /* !defined(OPENSSL_NO_EC) || !defined(OPENSSL_NO_DH) */
0f113f3e 196
fe6ef247 197/* The default curves */
65dc5c3c 198#if !defined(OPENSSL_NO_DH) || !defined(OPENSSL_NO_EC)
9aaecbfc 199static const uint16_t supported_groups_default[] = {
65dc5c3c 200# ifndef OPENSSL_NO_EC
9e84a42d
DSH		 201 29, /* X25519 (29) */
202 23, /* secp256r1 (23) */
0e1d6ecf 203 30, /* X448 (30) */
9e84a42d
DSH		 204 25, /* secp521r1 (25) */
205 24, /* secp384r1 (24) */
65dc5c3c 206# endif
fa555aa8
NM		 207# ifndef OPENSSL_NO_GOST
208 34, /* GC256A (34) */
209 35, /* GC256B (35) */
210 36, /* GC256C (36) */
211 37, /* GC256D (37) */
212 38, /* GC512A (38) */
213 39, /* GC512B (39) */
214 40, /* GC512C (40) */
215# endif
65dc5c3c 216# ifndef OPENSSL_NO_DH
9aaecbfc 217 0x100, /* ffdhe2048 (0x100) */
218 0x101, /* ffdhe3072 (0x101) */
219 0x102, /* ffdhe4096 (0x102) */
220 0x103, /* ffdhe6144 (0x103) */
221 0x104, /* ffdhe8192 (0x104) */
65dc5c3c 222# endif
de57d237 223};
65dc5c3c 224#endif /* !defined(OPENSSL_NO_EC) || !defined(OPENSSL_NO_DH) */
de57d237 225
dbc6268f 226#ifndef OPENSSL_NO_EC
9e84a42d
DSH		 227static const uint16_t suiteb_curves[] = {
228 TLSEXT_curve_P_256,
229 TLSEXT_curve_P_384
0f113f3e 230};
dbc6268f 231#endif
2ea80354 232
9d2d857f
MC		 233struct provider_group_data_st {
234 SSL_CTX *ctx;
235 OSSL_PROVIDER *provider;
236};
237
238#define TLS_GROUP_LIST_MALLOC_BLOCK_SIZE 10
239static OSSL_CALLBACK add_provider_groups;
240static int add_provider_groups(const OSSL_PARAM params[], void *data)
241{
242 struct provider_group_data_st *pgd = data;
243 SSL_CTX *ctx = pgd->ctx;
244 OSSL_PROVIDER *provider = pgd->provider;
245 const OSSL_PARAM *p;
246 TLS_GROUP_INFO *ginf = NULL;
247 EVP_KEYMGMT *keymgmt;
248 unsigned int gid;
c1a74f59 249 unsigned int is_kem = 0;
9d2d857f
MC		 250 int ret = 0;
251
252 if (ctx->group_list_max_len == ctx->group_list_len) {
253 TLS_GROUP_INFO *tmp = NULL;
254
255 if (ctx->group_list_max_len == 0)
256 tmp = OPENSSL_malloc(sizeof(TLS_GROUP_INFO)
257 * TLS_GROUP_LIST_MALLOC_BLOCK_SIZE);
258 else
259 tmp = OPENSSL_realloc(ctx->group_list,
260 (ctx->group_list_max_len
261 + TLS_GROUP_LIST_MALLOC_BLOCK_SIZE)
262 * sizeof(TLS_GROUP_INFO));
263 if (tmp == NULL) {
264 SSLerr(0, ERR_R_MALLOC_FAILURE);
265 return 0;
266 }
267 ctx->group_list = tmp;
268 memset(tmp + ctx->group_list_max_len,
269 0,
270 sizeof(TLS_GROUP_INFO) * TLS_GROUP_LIST_MALLOC_BLOCK_SIZE);
271 ctx->group_list_max_len += TLS_GROUP_LIST_MALLOC_BLOCK_SIZE;
272 }
273
274 ginf = &ctx->group_list[ctx->group_list_len];
275
276 p = OSSL_PARAM_locate_const(params, OSSL_CAPABILITY_TLS_GROUP_NAME);
277 if (p == NULL || p->data_type != OSSL_PARAM_UTF8_STRING) {
278 SSLerr(0, ERR_R_PASSED_INVALID_ARGUMENT);
279 goto err;
280 }
281 ginf->tlsname = OPENSSL_strdup(p->data);
282 if (ginf->tlsname == NULL) {
283 SSLerr(0, ERR_R_MALLOC_FAILURE);
284 goto err;
285 }
286
287 p = OSSL_PARAM_locate_const(params, OSSL_CAPABILITY_TLS_GROUP_NAME_INTERNAL);
288 if (p == NULL || p->data_type != OSSL_PARAM_UTF8_STRING) {
289 SSLerr(0, ERR_R_PASSED_INVALID_ARGUMENT);
290 goto err;
291 }
292 ginf->realname = OPENSSL_strdup(p->data);
293 if (ginf->realname == NULL) {
294 SSLerr(0, ERR_R_MALLOC_FAILURE);
295 goto err;
296 }
297
298 p = OSSL_PARAM_locate_const(params, OSSL_CAPABILITY_TLS_GROUP_ID);
299 if (p == NULL || !OSSL_PARAM_get_uint(p, &gid) || gid > UINT16_MAX) {
300 SSLerr(0, ERR_R_PASSED_INVALID_ARGUMENT);
301 goto err;
302 }
303 ginf->group_id = (uint16_t)gid;
304
305 p = OSSL_PARAM_locate_const(params, OSSL_CAPABILITY_TLS_GROUP_ALG);
306 if (p == NULL || p->data_type != OSSL_PARAM_UTF8_STRING) {
307 SSLerr(0, ERR_R_PASSED_INVALID_ARGUMENT);
308 goto err;
309 }
310 ginf->algorithm = OPENSSL_strdup(p->data);
311 if (ginf->algorithm == NULL) {
312 SSLerr(0, ERR_R_MALLOC_FAILURE);
313 goto err;
314 }
315
316 p = OSSL_PARAM_locate_const(params, OSSL_CAPABILITY_TLS_GROUP_SECURITY_BITS);
317 if (p == NULL || !OSSL_PARAM_get_uint(p, &ginf->secbits)) {
318 SSLerr(0, ERR_R_PASSED_INVALID_ARGUMENT);
319 goto err;
320 }
321
c1a74f59
NT		 322 p = OSSL_PARAM_locate_const(params, OSSL_CAPABILITY_TLS_GROUP_IS_KEM);
323 if (p != NULL && (!OSSL_PARAM_get_uint(p, &is_kem) || is_kem > 1)) {
324 SSLerr(0, ERR_R_PASSED_INVALID_ARGUMENT);
325 goto err;
326 }
327 ginf->is_kem = 1 & is_kem;
328
9d2d857f
MC		 329 p = OSSL_PARAM_locate_const(params, OSSL_CAPABILITY_TLS_GROUP_MIN_TLS);
330 if (p == NULL || !OSSL_PARAM_get_int(p, &ginf->mintls)) {
331 SSLerr(0, ERR_R_PASSED_INVALID_ARGUMENT);
332 goto err;
333 }
334
335 p = OSSL_PARAM_locate_const(params, OSSL_CAPABILITY_TLS_GROUP_MAX_TLS);
336 if (p == NULL || !OSSL_PARAM_get_int(p, &ginf->maxtls)) {
337 SSLerr(0, ERR_R_PASSED_INVALID_ARGUMENT);
90a74d8c 338 goto err;
9d2d857f
MC		 339 }
340
341 p = OSSL_PARAM_locate_const(params, OSSL_CAPABILITY_TLS_GROUP_MIN_DTLS);
342 if (p == NULL || !OSSL_PARAM_get_int(p, &ginf->mindtls)) {
343 SSLerr(0, ERR_R_PASSED_INVALID_ARGUMENT);
344 goto err;
345 }
346
347 p = OSSL_PARAM_locate_const(params, OSSL_CAPABILITY_TLS_GROUP_MAX_DTLS);
348 if (p == NULL || !OSSL_PARAM_get_int(p, &ginf->maxdtls)) {
349 SSLerr(0, ERR_R_PASSED_INVALID_ARGUMENT);
350 goto err;
351 }
352 /*
353 * Now check that the algorithm is actually usable for our property query
354 * string. Regardless of the result we still return success because we have
355 * successfully processed this group, even though we may decide not to use
356 * it.
357 */
358 ret = 1;
359 keymgmt = EVP_KEYMGMT_fetch(ctx->libctx, ginf->algorithm, ctx->propq);
360 if (keymgmt != NULL) {
361 /*
362 * We have successfully fetched the algorithm - however if the provider
363 * doesn't match this one then we ignore it.
364 *
365 * Note: We're cheating a little here. Technically if the same algorithm
366 * is available from more than one provider then it is undefined which
367 * implementation you will get back. Theoretically this could be
368 * different every time...we assume here that you'll always get the
369 * same one back if you repeat the exact same fetch. Is this a reasonable
370 * assumption to make (in which case perhaps we should document this
371 * behaviour)?
372 */
373 if (EVP_KEYMGMT_provider(keymgmt) == provider) {
374 /* We have a match - so we will use this group */
375 ctx->group_list_len++;
376 ginf = NULL;
377 }
378 EVP_KEYMGMT_free(keymgmt);
379 }
380 err:
381 if (ginf != NULL) {
382 OPENSSL_free(ginf->tlsname);
383 OPENSSL_free(ginf->realname);
384 OPENSSL_free(ginf->algorithm);
385 ginf->tlsname = ginf->realname = NULL;
386 }
387 return ret;
388}
389
390static int discover_provider_groups(OSSL_PROVIDER *provider, void *vctx)
391{
392 struct provider_group_data_st pgd;
393
394 pgd.ctx = vctx;
395 pgd.provider = provider;
396 return OSSL_PROVIDER_get_capabilities(provider, "TLS-GROUP",
397 add_provider_groups, &pgd);
398}
399
400int ssl_load_groups(SSL_CTX *ctx)
401{
402 return OSSL_PROVIDER_do_all(ctx->libctx, discover_provider_groups, ctx);
403}
404
260009d8
MC		 405static uint16_t tls1_group_name2id(SSL_CTX *ctx, const char *name)
406{
407 size_t i;
408 int nid = NID_undef;
409
410 /* See if we can identify a nid for this name */
411#ifndef OPENSSL_NO_EC
412 nid = EC_curve_nist2nid(name);
413#endif
414 if (nid == NID_undef)
415 nid = OBJ_sn2nid(name);
416 if (nid == NID_undef)
417 nid = OBJ_ln2nid(name);
418
419 for (i = 0; i < ctx->group_list_len; i++) {
420 if (strcmp(ctx->group_list[i].tlsname, name) == 0
421 || (nid != NID_undef
422 && nid == tls1_group_id2nid(ctx->group_list[i].group_id,
423 0)))
424 return ctx->group_list[i].group_id;
425 }
426
427 return 0;
428}
429
9d2d857f 430const TLS_GROUP_INFO *tls1_group_id_lookup(SSL_CTX *ctx, uint16_t group_id)
0f113f3e 431{
9aaecbfc 432 size_t i;
433
9d2d857f
MC		 434 for (i = 0; i < ctx->group_list_len; i++) {
435 if (ctx->group_list[i].group_id == group_id)
436 return &ctx->group_list[i];
9aaecbfc 437 }
9d2d857f 438
9aaecbfc 439 return NULL;
0f113f3e 440}
525de5d3 441
65dc5c3c 442#if !defined(OPENSSL_NO_DH) || !defined(OPENSSL_NO_EC)
260009d8 443int tls1_group_id2nid(uint16_t group_id, int include_unknown)
84d4b9e3 444{
9d2d857f 445 size_t i;
84d4b9e3 446
260009d8
MC		 447 if (group_id == 0)
448 return NID_undef;
449
9d2d857f
MC		 450 /*
451 * Return well known Group NIDs - for backwards compatibility. This won't
452 * work for groups we don't know about.
453 */
454 for (i = 0; i < OSSL_NELEM(nid_to_group); i++)
455 {
456 if (nid_to_group[i].group_id == group_id)
457 return nid_to_group[i].nid;
458 }
260009d8
MC		 459 if (!include_unknown)
460 return NID_undef;
461 return TLSEXT_nid_unknown | (int)group_id;
84d4b9e3 462}
463
4a1b4280 464static uint16_t tls1_nid2group_id(int nid)
0f113f3e 465{
2fa2d15a 466 size_t i;
9aaecbfc 467
9d2d857f
MC		 468 /*
469 * Return well known Group ids - for backwards compatibility. This won't
470 * work for groups we don't know about.
471 */
472 for (i = 0; i < OSSL_NELEM(nid_to_group); i++)
473 {
474 if (nid_to_group[i].nid == nid)
475 return nid_to_group[i].group_id;
0f113f3e 476 }
9d2d857f 477
2fa2d15a 478 return 0;
0f113f3e 479}
65dc5c3c 480#endif /* !defined(OPENSSL_NO_EC) || !defined(OPENSSL_NO_DH) */
0f113f3e 481
740580c2 482/*
ff6d20a6
DSH		 483 * Set *pgroups to the supported groups list and *pgroupslen to
484 * the number of groups supported.
fd2b65ce 485 */
ff6d20a6
DSH		 486void tls1_get_supported_groups(SSL *s, const uint16_t **pgroups,
487 size_t *pgroupslen)
0f113f3e 488{
65dc5c3c 489#if !defined(OPENSSL_NO_EC) || !defined(OPENSSL_NO_DH)
34e5292c
DSH		 490 /* For Suite B mode only include P-256, P-384 */
491 switch (tls1_suiteb(s)) {
65dc5c3c 492# ifndef OPENSSL_NO_EC
34e5292c 493 case SSL_CERT_FLAG_SUITEB_128_LOS:
ff6d20a6
DSH		 494 *pgroups = suiteb_curves;
495 *pgroupslen = OSSL_NELEM(suiteb_curves);
34e5292c
DSH		 496 break;
497
498 case SSL_CERT_FLAG_SUITEB_128_LOS_ONLY:
ff6d20a6
DSH		 499 *pgroups = suiteb_curves;
500 *pgroupslen = 1;
34e5292c
DSH		 501 break;
502
503 case SSL_CERT_FLAG_SUITEB_192_LOS:
ff6d20a6
DSH		 504 *pgroups = suiteb_curves + 1;
505 *pgroupslen = 1;
34e5292c 506 break;
65dc5c3c 507# endif
34e5292c
DSH		 508
509 default:
510 if (s->ext.supportedgroups == NULL) {
9aaecbfc 511 *pgroups = supported_groups_default;
512 *pgroupslen = OSSL_NELEM(supported_groups_default);
34e5292c 513 } else {
ff6d20a6
DSH		 514 *pgroups = s->ext.supportedgroups;
515 *pgroupslen = s->ext.supportedgroups_len;
0f113f3e 516 }
34e5292c 517 break;
0f113f3e 518 }
65dc5c3c
MC		 519#else
520 *pgroups = NULL;
521 *pgroupslen = 0;
522#endif /* !defined(OPENSSL_NO_EC) || !defined(OPENSSL_NO_DH) */
0f113f3e 523}
b362ccab 524
9d2d857f 525int tls_valid_group(SSL *s, uint16_t group_id, int minversion, int maxversion)
9aaecbfc 526{
9d2d857f
MC		 527 const TLS_GROUP_INFO *ginfo = tls1_group_id_lookup(s->ctx, group_id);
528 int ret;
9aaecbfc 529
9d2d857f
MC		 530 if (ginfo == NULL)
531 return 0;
532
533 if (SSL_IS_DTLS(s)) {
534 if (ginfo->mindtls < 0 || ginfo->maxdtls < 0)
9aaecbfc 535 return 0;
9d2d857f
MC		 536 if (ginfo->maxdtls == 0)
537 ret = 1;
538 else
539 ret = DTLS_VERSION_LE(minversion, ginfo->maxdtls);
540 if (ginfo->mindtls > 0)
541 ret &= DTLS_VERSION_GE(maxversion, ginfo->mindtls);
542 } else {
543 if (ginfo->mintls < 0 || ginfo->maxtls < 0)
544 return 0;
545 if (ginfo->maxtls == 0)
546 ret = 1;
547 else
548 ret = (minversion <= ginfo->maxtls);
549 if (ginfo->mintls > 0)
550 ret &= (maxversion >= ginfo->mintls);
9aaecbfc 551 }
9d2d857f
MC		 552
553 return ret;
9aaecbfc 554}
555
dbc6268f
MC		 556/* See if group is allowed by security callback */
557int tls_group_allowed(SSL *s, uint16_t group, int op)
0f113f3e 558{
9d2d857f 559 const TLS_GROUP_INFO *ginfo = tls1_group_id_lookup(s->ctx, group);
dbc6268f 560 unsigned char gtmp[2];
5ce5f787 561
dbc6268f 562 if (ginfo == NULL)
0f113f3e 563 return 0;
9d2d857f 564
dbc6268f
MC		 565 gtmp[0] = group >> 8;
566 gtmp[1] = group & 0xff;
9d2d857f 567 return ssl_security(s, op, ginfo->secbits,
260009d8 568 tls1_group_id2nid(ginfo->group_id, 0), (void *)gtmp);
0f113f3e 569}
b362ccab 570
b50951d3
DSH		 571/* Return 1 if "id" is in "list" */
572static int tls1_in_list(uint16_t id, const uint16_t *list, size_t listlen)
573{
574 size_t i;
575 for (i = 0; i < listlen; i++)
576 if (list[i] == id)
577 return 1;
578 return 0;
579}
580
1d97c843 581/*-
8841154a 582 * For nmatch >= 0, return the id of the |nmatch|th shared group or 0
6977e8ee
KR		 583 * if there is no match.
584 * For nmatch == -1, return number of matches
8841154a 585 * For nmatch == -2, return the id of the group to use for
b50951d3 586 * a tmp key, or 0 if there is no match.
d0595f17 587 */
8841154a 588uint16_t tls1_shared_group(SSL *s, int nmatch)
0f113f3e 589{
9e84a42d 590 const uint16_t *pref, *supp;
b50951d3 591 size_t num_pref, num_supp, i;
0f113f3e 592 int k;
3e373518 593
0f113f3e
MC		 594 /* Can't do anything on client side */
595 if (s->server == 0)
8841154a 596 return 0;
0f113f3e
MC		 597 if (nmatch == -2) {
598 if (tls1_suiteb(s)) {
599 /*
600 * For Suite B ciphersuite determines curve: we already know
601 * these are acceptable due to previous checks.
602 */
555cbb32 603 unsigned long cid = s->s3.tmp.new_cipher->id;
3e373518 604
0f113f3e 605 if (cid == TLS1_CK_ECDHE_ECDSA_WITH_AES_128_GCM_SHA256)
8841154a 606 return TLSEXT_curve_P_256;
0f113f3e 607 if (cid == TLS1_CK_ECDHE_ECDSA_WITH_AES_256_GCM_SHA384)
8841154a 608 return TLSEXT_curve_P_384;
0f113f3e 609 /* Should never happen */
8841154a 610 return 0;
0f113f3e
MC		 611 }
612 /* If not Suite B just return first preference shared curve */
613 nmatch = 0;
614 }
615 /*
ff6d20a6
DSH		 616 * If server preference set, our groups are the preference order
617 * otherwise peer decides.
0f113f3e 618 */
ff6d20a6
DSH		 619 if (s->options & SSL_OP_CIPHER_SERVER_PREFERENCE) {
620 tls1_get_supported_groups(s, &pref, &num_pref);
621 tls1_get_peer_groups(s, &supp, &num_supp);
622 } else {
623 tls1_get_peer_groups(s, &pref, &num_pref);
624 tls1_get_supported_groups(s, &supp, &num_supp);
625 }
3c06513f 626
9e84a42d
DSH		 627 for (k = 0, i = 0; i < num_pref; i++) {
628 uint16_t id = pref[i];
3e373518 629
b50951d3 630 if (!tls1_in_list(id, supp, num_supp)
dbc6268f 631 || !tls_group_allowed(s, id, SSL_SECOP_CURVE_SHARED))
0f113f3e 632 continue;
b50951d3
DSH		 633 if (nmatch == k)
634 return id;
635 k++;
0f113f3e
MC		 636 }
637 if (nmatch == -1)
638 return k;
639 /* Out of range (nmatch > k). */
8841154a 640 return 0;
0f113f3e 641}
d0595f17 642
9e84a42d 643int tls1_set_groups(uint16_t **pext, size_t *pextlen,
de4d764e 644 int *groups, size_t ngroups)
0f113f3e 645{
65dc5c3c 646#if !defined(OPENSSL_NO_EC) || !defined(OPENSSL_NO_DH)
9e84a42d 647 uint16_t *glist;
0f113f3e
MC		 648 size_t i;
649 /*
9aaecbfc 650 * Bitmap of groups included to detect duplicates: two variables are added
651 * to detect duplicates as some values are more than 32.
0f113f3e 652 */
9aaecbfc 653 unsigned long *dup_list = NULL;
654 unsigned long dup_list_egrp = 0;
655 unsigned long dup_list_dhgrp = 0;
cdb10bae 656
680bd131
MC		 657 if (ngroups == 0) {
658 SSLerr(SSL_F_TLS1_SET_GROUPS, SSL_R_BAD_LENGTH);
659 return 0;
660 }
cdb10bae
RS		 661 if ((glist = OPENSSL_malloc(ngroups * sizeof(*glist))) == NULL) {
662 SSLerr(SSL_F_TLS1_SET_GROUPS, ERR_R_MALLOC_FAILURE);
0f113f3e 663 return 0;
cdb10bae 664 }
9e84a42d 665 for (i = 0; i < ngroups; i++) {
0f113f3e 666 unsigned long idmask;
9e84a42d 667 uint16_t id;
4a1b4280 668 id = tls1_nid2group_id(groups[i]);
9aaecbfc 669 if ((id & 0x00FF) >= (sizeof(unsigned long) * 8))
670 goto err;
671 idmask = 1L << (id & 0x00FF);
672 dup_list = (id < 0x100) ? &dup_list_egrp : &dup_list_dhgrp;
673 if (!id || ((*dup_list) & idmask))
674 goto err;
675 *dup_list |= idmask;
9e84a42d 676 glist[i] = id;
0f113f3e 677 }
b548a1f1 678 OPENSSL_free(*pext);
de4d764e 679 *pext = glist;
9e84a42d 680 *pextlen = ngroups;
0f113f3e 681 return 1;
9aaecbfc 682err:
683 OPENSSL_free(glist);
684 return 0;
65dc5c3c
MC		 685#else
686 return 0;
687#endif /* !defined(OPENSSL_NO_EC) || !defined(OPENSSL_NO_DH) */
0f113f3e
MC		 688}
689
9d2d857f
MC		 690/* TODO(3.0): An arbitrary amount for now. Take another look at this */
691# define MAX_GROUPLIST 40
0f113f3e
MC		 692
693typedef struct {
260009d8
MC		 694 SSL_CTX *ctx;
695 size_t gidcnt;
696 uint16_t gid_arr[MAX_GROUPLIST];
697} gid_cb_st;
d0595f17 698
260009d8 699static int gid_cb(const char *elem, int len, void *arg)
0f113f3e 700{
260009d8 701 gid_cb_st *garg = arg;
0f113f3e 702 size_t i;
260009d8 703 uint16_t gid = 0;
0f113f3e 704 char etmp[20];
260009d8 705
2747d73c
KR		 706 if (elem == NULL)
707 return 0;
260009d8 708 if (garg->gidcnt == MAX_GROUPLIST)
0f113f3e
MC		 709 return 0;
710 if (len > (int)(sizeof(etmp) - 1))
711 return 0;
712 memcpy(etmp, elem, len);
713 etmp[len] = 0;
260009d8
MC		 714
715 gid = tls1_group_name2id(garg->ctx, etmp);
716 if (gid == 0)
0f113f3e 717 return 0;
260009d8
MC		 718 for (i = 0; i < garg->gidcnt; i++)
719 if (garg->gid_arr[i] == gid)
0f113f3e 720 return 0;
260009d8 721 garg->gid_arr[garg->gidcnt++] = gid;
0f113f3e
MC		 722 return 1;
723}
724
260009d8
MC		 725/* Set groups based on a colon separated list */
726int tls1_set_groups_list(SSL_CTX *ctx, uint16_t **pext, size_t *pextlen,
727 const char *str)
0f113f3e 728{
260009d8
MC		 729 gid_cb_st gcb;
730 uint16_t *tmparr;
731
732 gcb.gidcnt = 0;
733 gcb.ctx = ctx;
734 if (!CONF_parse_list(str, ':', 1, gid_cb, &gcb))
0f113f3e
MC		 735 return 0;
736 if (pext == NULL)
737 return 1;
260009d8
MC		 738
739 /*
740 * gid_cb ensurse there are no duplicates so we can just go ahead and set
741 * the result
742 */
743 tmparr = OPENSSL_memdup(gcb.gid_arr, gcb.gidcnt * sizeof(*tmparr));
744 if (tmparr == NULL)
745 return 0;
746 *pext = tmparr;
747 *pextlen = gcb.gidcnt;
748 return 1;
0f113f3e 749}
b50951d3 750
4a1b4280 751/* Check a group id matches preferences */
dcf8b01f 752int tls1_check_group_id(SSL *s, uint16_t group_id, int check_own_groups)
4a1b4280
DSH		 753 {
754 const uint16_t *groups;
b50951d3 755 size_t groups_len;
4a1b4280
DSH		 756
757 if (group_id == 0)
758 return 0;
759
6447e818 760 /* Check for Suite B compliance */
555cbb32
TS		 761 if (tls1_suiteb(s) && s->s3.tmp.new_cipher != NULL) {
762 unsigned long cid = s->s3.tmp.new_cipher->id;
6447e818
DSH		 763
764 if (cid == TLS1_CK_ECDHE_ECDSA_WITH_AES_128_GCM_SHA256) {
765 if (group_id != TLSEXT_curve_P_256)
766 return 0;
767 } else if (cid == TLS1_CK_ECDHE_ECDSA_WITH_AES_256_GCM_SHA384) {
768 if (group_id != TLSEXT_curve_P_384)
769 return 0;
770 } else {
771 /* Should never happen */
772 return 0;
773 }
774 }
b50951d3 775
dcf8b01f
MC		 776 if (check_own_groups) {
777 /* Check group is one of our preferences */
778 tls1_get_supported_groups(s, &groups, &groups_len);
779 if (!tls1_in_list(group_id, groups, groups_len))
780 return 0;
781 }
4a1b4280 782
dbc6268f 783 if (!tls_group_allowed(s, group_id, SSL_SECOP_CURVE_CHECK))
6447e818
DSH		 784 return 0;
785
4a1b4280
DSH		 786 /* For clients, nothing more to check */
787 if (!s->server)
788 return 1;
789
790 /* Check group is one of peers preferences */
ff6d20a6 791 tls1_get_peer_groups(s, &groups, &groups_len);
4a1b4280
DSH		 792
793 /*
794 * RFC 4492 does not require the supported elliptic curves extension
795 * so if it is not sent we can just choose any curve.
796 * It is invalid to send an empty list in the supported groups
797 * extension, so groups_len == 0 always means no extension.
798 */
799 if (groups_len == 0)
800 return 1;
b50951d3 801 return tls1_in_list(group_id, groups, groups_len);
0f113f3e 802}
d61ff83b 803
dbc6268f 804#ifndef OPENSSL_NO_EC
7da160b0
MC		 805void tls1_get_formatlist(SSL *s, const unsigned char **pformats,
806 size_t *num_formats)
0f113f3e
MC		 807{
808 /*
809 * If we have a custom point format list use it otherwise use default
810 */
aff8c126
RS		 811 if (s->ext.ecpointformats) {
812 *pformats = s->ext.ecpointformats;
813 *num_formats = s->ext.ecpointformats_len;
0f113f3e
MC		 814 } else {
815 *pformats = ecformats_default;
816 /* For Suite B we don't support char2 fields */
817 if (tls1_suiteb(s))
818 *num_formats = sizeof(ecformats_default) - 1;
819 else
820 *num_formats = sizeof(ecformats_default);
821 }
822}
823
dbc6268f
MC		 824/* Check a key is compatible with compression extension */
825static int tls1_check_pkey_comp(SSL *s, EVP_PKEY *pkey)
826{
827 const EC_KEY *ec;
828 const EC_GROUP *grp;
829 unsigned char comp_id;
830 size_t i;
831
832 /* If not an EC key nothing to check */
c2041da8 833 if (!EVP_PKEY_is_a(pkey, "EC"))
dbc6268f
MC		 834 return 1;
835 ec = EVP_PKEY_get0_EC_KEY(pkey);
836 grp = EC_KEY_get0_group(ec);
837
838 /* Get required compression id */
839 if (EC_KEY_get_conv_form(ec) == POINT_CONVERSION_UNCOMPRESSED) {
840 comp_id = TLSEXT_ECPOINTFORMAT_uncompressed;
841 } else if (SSL_IS_TLS13(s)) {
842 /*
843 * ec_point_formats extension is not used in TLSv1.3 so we ignore
844 * this check.
845 */
846 return 1;
847 } else {
23ccae80 848 int field_type = EC_GROUP_get_field_type(grp);
dbc6268f
MC		 849
850 if (field_type == NID_X9_62_prime_field)
851 comp_id = TLSEXT_ECPOINTFORMAT_ansiX962_compressed_prime;
852 else if (field_type == NID_X9_62_characteristic_two_field)
853 comp_id = TLSEXT_ECPOINTFORMAT_ansiX962_compressed_char2;
854 else
855 return 0;
856 }
857 /*
858 * If point formats extension present check it, otherwise everything is
859 * supported (see RFC4492).
860 */
cd0fb43c 861 if (s->ext.peer_ecpointformats == NULL)
dbc6268f
MC		 862 return 1;
863
cd0fb43c
MC		 864 for (i = 0; i < s->ext.peer_ecpointformats_len; i++) {
865 if (s->ext.peer_ecpointformats[i] == comp_id)
dbc6268f
MC		 866 return 1;
867 }
868 return 0;
869}
870
871/* Return group id of a key */
872static uint16_t tls1_get_group_id(EVP_PKEY *pkey)
873{
c2041da8 874 int curve_nid = evp_pkey_get_EC_KEY_curve_nid(pkey);
dbc6268f 875
c2041da8 876 if (curve_nid == NID_undef)
dbc6268f 877 return 0;
c2041da8 878 return tls1_nid2group_id(curve_nid);
dbc6268f
MC		 879}
880
0f113f3e
MC		 881/*
882 * Check cert parameters compatible with extensions: currently just checks EC
883 * certificates have compatible curves and compression.
d61ff83b 884 */
9195ddcd 885static int tls1_check_cert_param(SSL *s, X509 *x, int check_ee_md)
0f113f3e 886{
4a1b4280 887 uint16_t group_id;
0f113f3e 888 EVP_PKEY *pkey;
8382fd3a 889 pkey = X509_get0_pubkey(x);
4a1b4280 890 if (pkey == NULL)
0f113f3e
MC		 891 return 0;
892 /* If not EC nothing to do */
c2041da8 893 if (!EVP_PKEY_is_a(pkey, "EC"))
0f113f3e 894 return 1;
4a1b4280
DSH		 895 /* Check compression */
896 if (!tls1_check_pkey_comp(s, pkey))
0f113f3e 897 return 0;
4a1b4280 898 group_id = tls1_get_group_id(pkey);
dcf8b01f
MC		 899 /*
900 * For a server we allow the certificate to not be in our list of supported
901 * groups.
902 */
903 if (!tls1_check_group_id(s, group_id, !s->server))
0f113f3e
MC		 904 return 0;
905 /*
906 * Special case for suite B. We *MUST* sign using SHA256+P-256 or
9195ddcd 907 * SHA384+P-384.
0f113f3e 908 */
9195ddcd 909 if (check_ee_md && tls1_suiteb(s)) {
0f113f3e
MC		 910 int check_md;
911 size_t i;
9e84a42d 912
0f113f3e 913 /* Check to see we have necessary signing algorithm */
4a1b4280 914 if (group_id == TLSEXT_curve_P_256)
0f113f3e 915 check_md = NID_ecdsa_with_SHA256;
4a1b4280 916 else if (group_id == TLSEXT_curve_P_384)
0f113f3e
MC		 917 check_md = NID_ecdsa_with_SHA384;
918 else
919 return 0; /* Should never happen */
29948ac8
BK		 920 for (i = 0; i < s->shared_sigalgslen; i++) {
921 if (check_md == s->shared_sigalgs[i]->sigandhash)
4a1b4280
DSH		 922 return 1;;
923 }
924 return 0;
0f113f3e 925 }
4a1b4280 926 return 1;
0f113f3e
MC		 927}
928
6977e8ee 929/*
8483a003 930 * tls1_check_ec_tmp_key - Check EC temporary key compatibility
6977e8ee
KR		 931 * @s: SSL connection
932 * @cid: Cipher ID we're considering using
933 *
934 * Checks that the kECDHE cipher suite we're considering using
935 * is compatible with the client extensions.
936 *
937 * Returns 0 when the cipher can't be used or 1 when it can.
938 */
2ea80354 939int tls1_check_ec_tmp_key(SSL *s, unsigned long cid)
0f113f3e 940{
4a1b4280
DSH		 941 /* If not Suite B just need a shared group */
942 if (!tls1_suiteb(s))
943 return tls1_shared_group(s, 0) != 0;
0f113f3e
MC		 944 /*
945 * If Suite B, AES128 MUST use P-256 and AES256 MUST use P-384, no other
946 * curves permitted.
947 */
4a1b4280 948 if (cid == TLS1_CK_ECDHE_ECDSA_WITH_AES_128_GCM_SHA256)
dcf8b01f 949 return tls1_check_group_id(s, TLSEXT_curve_P_256, 1);
4a1b4280 950 if (cid == TLS1_CK_ECDHE_ECDSA_WITH_AES_256_GCM_SHA384)
dcf8b01f 951 return tls1_check_group_id(s, TLSEXT_curve_P_384, 1);
4a1b4280
DSH		 952
953 return 0;
0f113f3e 954}
d0595f17 955
14536c8c
DSH		 956#else
957
958static int tls1_check_cert_param(SSL *s, X509 *x, int set_ee_md)
0f113f3e
MC		 959{
960 return 1;
961}
14536c8c 962
0f113f3e 963#endif /* OPENSSL_NO_EC */
f1fd4544 964
703bcee0 965/* Default sigalg schemes */
98c792d1 966static const uint16_t tls12_sigalgs[] = {
703bcee0
MC		 967#ifndef OPENSSL_NO_EC
968 TLSEXT_SIGALG_ecdsa_secp256r1_sha256,
969 TLSEXT_SIGALG_ecdsa_secp384r1_sha384,
970 TLSEXT_SIGALG_ecdsa_secp521r1_sha512,
3d234c9e 971 TLSEXT_SIGALG_ed25519,
0e1d6ecf 972 TLSEXT_SIGALG_ed448,
e481f9b9 973#endif
0f113f3e 974
f55e99f7
BK		 975 TLSEXT_SIGALG_rsa_pss_pss_sha256,
976 TLSEXT_SIGALG_rsa_pss_pss_sha384,
977 TLSEXT_SIGALG_rsa_pss_pss_sha512,
978 TLSEXT_SIGALG_rsa_pss_rsae_sha256,
979 TLSEXT_SIGALG_rsa_pss_rsae_sha384,
980 TLSEXT_SIGALG_rsa_pss_rsae_sha512,
536199ec 981
703bcee0
MC		 982 TLSEXT_SIGALG_rsa_pkcs1_sha256,
983 TLSEXT_SIGALG_rsa_pkcs1_sha384,
984 TLSEXT_SIGALG_rsa_pkcs1_sha512,
0f113f3e 985
5eeb6c6e 986#ifndef OPENSSL_NO_EC
d8311fc9 987 TLSEXT_SIGALG_ecdsa_sha224,
42ab2230 988 TLSEXT_SIGALG_ecdsa_sha1,
5eeb6c6e 989#endif
d8311fc9 990 TLSEXT_SIGALG_rsa_pkcs1_sha224,
42ab2230 991 TLSEXT_SIGALG_rsa_pkcs1_sha1,
5eeb6c6e 992#ifndef OPENSSL_NO_DSA
d8311fc9 993 TLSEXT_SIGALG_dsa_sha224,
42ab2230
MC		 994 TLSEXT_SIGALG_dsa_sha1,
995
703bcee0
MC		 996 TLSEXT_SIGALG_dsa_sha256,
997 TLSEXT_SIGALG_dsa_sha384,
41f10305
DB		 998 TLSEXT_SIGALG_dsa_sha512,
999#endif
1000#ifndef OPENSSL_NO_GOST
6f892296
NM		 1001 TLSEXT_SIGALG_gostr34102012_256_intrinsic,
1002 TLSEXT_SIGALG_gostr34102012_512_intrinsic,
41f10305
DB		 1003 TLSEXT_SIGALG_gostr34102012_256_gostr34112012_256,
1004 TLSEXT_SIGALG_gostr34102012_512_gostr34112012_512,
1005 TLSEXT_SIGALG_gostr34102001_gostr3411,
5eeb6c6e 1006#endif
fc101f88 1007};
0f113f3e 1008
e481f9b9 1009#ifndef OPENSSL_NO_EC
98c792d1 1010static const uint16_t suiteb_sigalgs[] = {
703bcee0
MC		 1011 TLSEXT_SIGALG_ecdsa_secp256r1_sha256,
1012 TLSEXT_SIGALG_ecdsa_secp384r1_sha384
2ea80354 1013};
e481f9b9 1014#endif
aff8c126 1015
7a531ee4 1016static const SIGALG_LOOKUP sigalg_lookup_tbl[] = {
5eeb6c6e 1017#ifndef OPENSSL_NO_EC
edbfba1a 1018 {"ecdsa_secp256r1_sha256", TLSEXT_SIGALG_ecdsa_secp256r1_sha256,
17ae384e 1019 NID_sha256, SSL_MD_SHA256_IDX, EVP_PKEY_EC, SSL_PKEY_ECC,
263ff2c9 1020 NID_ecdsa_with_SHA256, NID_X9_62_prime256v1, 1},
edbfba1a 1021 {"ecdsa_secp384r1_sha384", TLSEXT_SIGALG_ecdsa_secp384r1_sha384,
17ae384e 1022 NID_sha384, SSL_MD_SHA384_IDX, EVP_PKEY_EC, SSL_PKEY_ECC,
263ff2c9 1023 NID_ecdsa_with_SHA384, NID_secp384r1, 1},
edbfba1a 1024 {"ecdsa_secp521r1_sha512", TLSEXT_SIGALG_ecdsa_secp521r1_sha512,
17ae384e 1025 NID_sha512, SSL_MD_SHA512_IDX, EVP_PKEY_EC, SSL_PKEY_ECC,
263ff2c9 1026 NID_ecdsa_with_SHA512, NID_secp521r1, 1},
b04d4e38 1027 {"ed25519", TLSEXT_SIGALG_ed25519,
d2916a5b 1028 NID_undef, -1, EVP_PKEY_ED25519, SSL_PKEY_ED25519,
263ff2c9 1029 NID_undef, NID_undef, 1},
0e1d6ecf
MC		 1030 {"ed448", TLSEXT_SIGALG_ed448,
1031 NID_undef, -1, EVP_PKEY_ED448, SSL_PKEY_ED448,
263ff2c9 1032 NID_undef, NID_undef, 1},
d8311fc9
MC		 1033 {NULL, TLSEXT_SIGALG_ecdsa_sha224,
1034 NID_sha224, SSL_MD_SHA224_IDX, EVP_PKEY_EC, SSL_PKEY_ECC,
263ff2c9 1035 NID_ecdsa_with_SHA224, NID_undef, 1},
edbfba1a 1036 {NULL, TLSEXT_SIGALG_ecdsa_sha1,
17ae384e 1037 NID_sha1, SSL_MD_SHA1_IDX, EVP_PKEY_EC, SSL_PKEY_ECC,
263ff2c9 1038 NID_ecdsa_with_SHA1, NID_undef, 1},
5eeb6c6e 1039#endif
f55e99f7
BK		 1040 {"rsa_pss_rsae_sha256", TLSEXT_SIGALG_rsa_pss_rsae_sha256,
1041 NID_sha256, SSL_MD_SHA256_IDX, EVP_PKEY_RSA_PSS, SSL_PKEY_RSA,
263ff2c9 1042 NID_undef, NID_undef, 1},
f55e99f7
BK		 1043 {"rsa_pss_rsae_sha384", TLSEXT_SIGALG_rsa_pss_rsae_sha384,
1044 NID_sha384, SSL_MD_SHA384_IDX, EVP_PKEY_RSA_PSS, SSL_PKEY_RSA,
263ff2c9 1045 NID_undef, NID_undef, 1},
f55e99f7
BK		 1046 {"rsa_pss_rsae_sha512", TLSEXT_SIGALG_rsa_pss_rsae_sha512,
1047 NID_sha512, SSL_MD_SHA512_IDX, EVP_PKEY_RSA_PSS, SSL_PKEY_RSA,
263ff2c9 1048 NID_undef, NID_undef, 1},
f55e99f7 1049 {"rsa_pss_pss_sha256", TLSEXT_SIGALG_rsa_pss_pss_sha256,
17ae384e 1050 NID_sha256, SSL_MD_SHA256_IDX, EVP_PKEY_RSA_PSS, SSL_PKEY_RSA_PSS_SIGN,
263ff2c9 1051 NID_undef, NID_undef, 1},
f55e99f7 1052 {"rsa_pss_pss_sha384", TLSEXT_SIGALG_rsa_pss_pss_sha384,
17ae384e 1053 NID_sha384, SSL_MD_SHA384_IDX, EVP_PKEY_RSA_PSS, SSL_PKEY_RSA_PSS_SIGN,
263ff2c9 1054 NID_undef, NID_undef, 1},
f55e99f7 1055 {"rsa_pss_pss_sha512", TLSEXT_SIGALG_rsa_pss_pss_sha512,
17ae384e 1056 NID_sha512, SSL_MD_SHA512_IDX, EVP_PKEY_RSA_PSS, SSL_PKEY_RSA_PSS_SIGN,
263ff2c9 1057 NID_undef, NID_undef, 1},
edbfba1a 1058 {"rsa_pkcs1_sha256", TLSEXT_SIGALG_rsa_pkcs1_sha256,
d0ff28f8 1059 NID_sha256, SSL_MD_SHA256_IDX, EVP_PKEY_RSA, SSL_PKEY_RSA,
263ff2c9 1060 NID_sha256WithRSAEncryption, NID_undef, 1},
edbfba1a 1061 {"rsa_pkcs1_sha384", TLSEXT_SIGALG_rsa_pkcs1_sha384,
d0ff28f8 1062 NID_sha384, SSL_MD_SHA384_IDX, EVP_PKEY_RSA, SSL_PKEY_RSA,
263ff2c9 1063 NID_sha384WithRSAEncryption, NID_undef, 1},
edbfba1a 1064 {"rsa_pkcs1_sha512", TLSEXT_SIGALG_rsa_pkcs1_sha512,
d0ff28f8 1065 NID_sha512, SSL_MD_SHA512_IDX, EVP_PKEY_RSA, SSL_PKEY_RSA,
263ff2c9 1066 NID_sha512WithRSAEncryption, NID_undef, 1},
d8311fc9
MC		 1067 {"rsa_pkcs1_sha224", TLSEXT_SIGALG_rsa_pkcs1_sha224,
1068 NID_sha224, SSL_MD_SHA224_IDX, EVP_PKEY_RSA, SSL_PKEY_RSA,
263ff2c9 1069 NID_sha224WithRSAEncryption, NID_undef, 1},
edbfba1a 1070 {"rsa_pkcs1_sha1", TLSEXT_SIGALG_rsa_pkcs1_sha1,
d0ff28f8 1071 NID_sha1, SSL_MD_SHA1_IDX, EVP_PKEY_RSA, SSL_PKEY_RSA,
263ff2c9 1072 NID_sha1WithRSAEncryption, NID_undef, 1},
5eeb6c6e 1073#ifndef OPENSSL_NO_DSA
edbfba1a 1074 {NULL, TLSEXT_SIGALG_dsa_sha256,
17ae384e 1075 NID_sha256, SSL_MD_SHA256_IDX, EVP_PKEY_DSA, SSL_PKEY_DSA_SIGN,
263ff2c9 1076 NID_dsa_with_SHA256, NID_undef, 1},
edbfba1a 1077 {NULL, TLSEXT_SIGALG_dsa_sha384,
17ae384e 1078 NID_sha384, SSL_MD_SHA384_IDX, EVP_PKEY_DSA, SSL_PKEY_DSA_SIGN,
263ff2c9 1079 NID_undef, NID_undef, 1},
edbfba1a 1080 {NULL, TLSEXT_SIGALG_dsa_sha512,
17ae384e 1081 NID_sha512, SSL_MD_SHA512_IDX, EVP_PKEY_DSA, SSL_PKEY_DSA_SIGN,
263ff2c9 1082 NID_undef, NID_undef, 1},
d8311fc9
MC		 1083 {NULL, TLSEXT_SIGALG_dsa_sha224,
1084 NID_sha224, SSL_MD_SHA224_IDX, EVP_PKEY_DSA, SSL_PKEY_DSA_SIGN,
263ff2c9 1085 NID_undef, NID_undef, 1},
edbfba1a 1086 {NULL, TLSEXT_SIGALG_dsa_sha1,
17ae384e 1087 NID_sha1, SSL_MD_SHA1_IDX, EVP_PKEY_DSA, SSL_PKEY_DSA_SIGN,
263ff2c9 1088 NID_dsaWithSHA1, NID_undef, 1},
5eeb6c6e
MC		 1089#endif
1090#ifndef OPENSSL_NO_GOST
6f892296
NM		 1091 {NULL, TLSEXT_SIGALG_gostr34102012_256_intrinsic,
1092 NID_id_GostR3411_2012_256, SSL_MD_GOST12_256_IDX,
1093 NID_id_GostR3410_2012_256, SSL_PKEY_GOST12_256,
263ff2c9 1094 NID_undef, NID_undef, 1},
6f892296
NM		 1095 {NULL, TLSEXT_SIGALG_gostr34102012_512_intrinsic,
1096 NID_id_GostR3411_2012_512, SSL_MD_GOST12_512_IDX,
1097 NID_id_GostR3410_2012_512, SSL_PKEY_GOST12_512,
263ff2c9 1098 NID_undef, NID_undef, 1},
edbfba1a 1099 {NULL, TLSEXT_SIGALG_gostr34102012_256_gostr34112012_256,
17ae384e
DSH		 1100 NID_id_GostR3411_2012_256, SSL_MD_GOST12_256_IDX,
1101 NID_id_GostR3410_2012_256, SSL_PKEY_GOST12_256,
263ff2c9 1102 NID_undef, NID_undef, 1},
edbfba1a 1103 {NULL, TLSEXT_SIGALG_gostr34102012_512_gostr34112012_512,
17ae384e
DSH		 1104 NID_id_GostR3411_2012_512, SSL_MD_GOST12_512_IDX,
1105 NID_id_GostR3410_2012_512, SSL_PKEY_GOST12_512,
263ff2c9 1106 NID_undef, NID_undef, 1},
edbfba1a 1107 {NULL, TLSEXT_SIGALG_gostr34102001_gostr3411,
17ae384e
DSH		 1108 NID_id_GostR3411_94, SSL_MD_GOST94_IDX,
1109 NID_id_GostR3410_2001, SSL_PKEY_GOST01,
263ff2c9 1110 NID_undef, NID_undef, 1}
5eeb6c6e 1111#endif
703bcee0 1112};
0972bc5c
DSH		 1113/* Legacy sigalgs for TLS < 1.2 RSA TLS signatures */
1114static const SIGALG_LOOKUP legacy_rsa_sigalg = {
1115 "rsa_pkcs1_md5_sha1", 0,
1116 NID_md5_sha1, SSL_MD_MD5_SHA1_IDX,
1117 EVP_PKEY_RSA, SSL_PKEY_RSA,
263ff2c9 1118 NID_undef, NID_undef, 1
0972bc5c
DSH		 1119};
1120
1121/*
1122 * Default signature algorithm values used if signature algorithms not present.
1123 * From RFC5246. Note: order must match certificate index order.
1124 */
1125static const uint16_t tls_default_sigalg[] = {
1126 TLSEXT_SIGALG_rsa_pkcs1_sha1, /* SSL_PKEY_RSA */
045d078a 1127 0, /* SSL_PKEY_RSA_PSS_SIGN */
0972bc5c
DSH		 1128 TLSEXT_SIGALG_dsa_sha1, /* SSL_PKEY_DSA_SIGN */
1129 TLSEXT_SIGALG_ecdsa_sha1, /* SSL_PKEY_ECC */
1130 TLSEXT_SIGALG_gostr34102001_gostr3411, /* SSL_PKEY_GOST01 */
6f892296
NM		 1131 TLSEXT_SIGALG_gostr34102012_256_intrinsic, /* SSL_PKEY_GOST12_256 */
1132 TLSEXT_SIGALG_gostr34102012_512_intrinsic, /* SSL_PKEY_GOST12_512 */
0e1d6ecf
MC		 1133 0, /* SSL_PKEY_ED25519 */
1134 0, /* SSL_PKEY_ED448 */
0972bc5c 1135};
703bcee0 1136
263ff2c9
MC		 1137int ssl_setup_sig_algs(SSL_CTX *ctx)
1138{
1139 size_t i;
1140 const SIGALG_LOOKUP *lu;
1141 SIGALG_LOOKUP *cache
1142 = OPENSSL_malloc(sizeof(*lu) * OSSL_NELEM(sigalg_lookup_tbl));
1143 EVP_PKEY *tmpkey = EVP_PKEY_new();
1144 int ret = 0;
1145
1146 if (cache == NULL || tmpkey == NULL)
1147 goto err;
1148
1149 ERR_set_mark();
1150 for (i = 0, lu = sigalg_lookup_tbl;
1151 i < OSSL_NELEM(sigalg_lookup_tbl); lu++, i++) {
1152 EVP_PKEY_CTX *pctx;
1153
1154 cache[i] = *lu;
1155
1156 /*
1157 * Check hash is available.
1158 * TODO(3.0): This test is not perfect. A provider could have support
1159 * for a signature scheme, but not a particular hash. However the hash
1160 * could be available from some other loaded provider. In that case it
1161 * could be that the signature is available, and the hash is available
1162 * independently - but not as a combination. We ignore this for now.
1163 */
1164 if (lu->hash != NID_undef
1165 && ctx->ssl_digest_methods[lu->hash_idx] == NULL) {
1166 cache[i].enabled = 0;
1167 continue;
1168 }
1169
1170 if (!EVP_PKEY_set_type(tmpkey, lu->sig)) {
1171 cache[i].enabled = 0;
1172 continue;
1173 }
1174 pctx = EVP_PKEY_CTX_new_from_pkey(ctx->libctx, tmpkey, ctx->propq);
1175 /* If unable to create pctx we assume the sig algorithm is unavailable */
1176 if (pctx == NULL)
1177 cache[i].enabled = 0;
1178 EVP_PKEY_CTX_free(pctx);
1179 }
1180 ERR_pop_to_mark();
1181 ctx->sigalg_lookup_cache = cache;
1182 cache = NULL;
1183
1184 ret = 1;
1185 err:
1186 OPENSSL_free(cache);
1187 EVP_PKEY_free(tmpkey);
1188 return ret;
1189}
1190
4d43ee28 1191/* Lookup TLS signature algorithm */
263ff2c9 1192static const SIGALG_LOOKUP *tls1_lookup_sigalg(const SSL *s, uint16_t sigalg)
703bcee0
MC		 1193{
1194 size_t i;
263ff2c9 1195 const SIGALG_LOOKUP *lu;
703bcee0 1196
263ff2c9
MC		 1197 for (i = 0, lu = s->ctx->sigalg_lookup_cache;
1198 /* cache should have the same number of elements as sigalg_lookup_tbl */
1199 i < OSSL_NELEM(sigalg_lookup_tbl);
1200 lu++, i++) {
1201 if (lu->sigalg == sigalg)
1202 return lu;
703bcee0 1203 }
4d43ee28
DSH		 1204 return NULL;
1205}
168067b6 1206/* Lookup hash: return 0 if invalid or not enabled */
c8f6c28a 1207int tls1_lookup_md(SSL_CTX *ctx, const SIGALG_LOOKUP *lu, const EVP_MD **pmd)
168067b6
DSH		 1208{
1209 const EVP_MD *md;
1210 if (lu == NULL)
1211 return 0;
1212 /* lu->hash == NID_undef means no associated digest */
1213 if (lu->hash == NID_undef) {
1214 md = NULL;
1215 } else {
c8f6c28a 1216 md = ssl_md(ctx, lu->hash_idx);
168067b6
DSH		 1217 if (md == NULL)
1218 return 0;
1219 }
1220 if (pmd)
1221 *pmd = md;
1222 return 1;
1223}
1224
0fe3db25
NR		 1225/*
1226 * Check if key is large enough to generate RSA-PSS signature.
1227 *
1228 * The key must greater than or equal to 2 * hash length + 2.
1229 * SHA512 has a hash length of 64 bytes, which is incompatible
1230 * with a 128 byte (1024 bit) key.
1231 */
1232#define RSA_PSS_MINIMUM_KEY_SIZE(md) (2 * EVP_MD_size(md) + 2)
c5f87134 1233static int rsa_pss_check_min_key_size(SSL_CTX *ctx, const EVP_PKEY *pkey,
c8f6c28a 1234 const SIGALG_LOOKUP *lu)
0fe3db25
NR		 1235{
1236 const EVP_MD *md;
1237
c5f87134 1238 if (pkey == NULL)
0fe3db25 1239 return 0;
c8f6c28a 1240 if (!tls1_lookup_md(ctx, lu, &md) || md == NULL)
0fe3db25 1241 return 0;
c5f87134 1242 if (EVP_PKEY_size(pkey) < RSA_PSS_MINIMUM_KEY_SIZE(md))
0fe3db25
NR		 1243 return 0;
1244 return 1;
1245}
1246
0972bc5c 1247/*
b0031e5d
KR		 1248 * Returns a signature algorithm when the peer did not send a list of supported
1249 * signature algorithms. The signature algorithm is fixed for the certificate
1250 * type. |idx| is a certificate type index (SSL_PKEY_*). When |idx| is -1 the
1251 * certificate type from |s| will be used.
1252 * Returns the signature algorithm to use, or NULL on error.
0972bc5c
DSH		 1253 */
1254static const SIGALG_LOOKUP *tls1_get_legacy_sigalg(const SSL *s, int idx)
1255{
7f6b466b
DSH		 1256 if (idx == -1) {
1257 if (s->server) {
1258 size_t i;
1259
1260 /* Work out index corresponding to ciphersuite */
1261 for (i = 0; i < SSL_PKEY_NUM; i++) {
1262 const SSL_CERT_LOOKUP *clu = ssl_cert_lookup_by_idx(i);
1263
555cbb32 1264 if (clu->amask & s->s3.tmp.new_cipher->algorithm_auth) {
7f6b466b
DSH		 1265 idx = i;
1266 break;
1267 }
1268 }
1f65c045
DB		 1269
1270 /*
1271 * Some GOST ciphersuites allow more than one signature algorithms
1272 * */
555cbb32 1273 if (idx == SSL_PKEY_GOST01 && s->s3.tmp.new_cipher->algorithm_auth != SSL_aGOST01) {
1f65c045
DB		 1274 int real_idx;
1275
1276 for (real_idx = SSL_PKEY_GOST12_512; real_idx >= SSL_PKEY_GOST01;
1277 real_idx--) {
1278 if (s->cert->pkeys[real_idx].privatekey != NULL) {
1279 idx = real_idx;
1280 break;
1281 }
1282 }
1283 }
5a5530a2
DB		 1284 /*
1285 * As both SSL_PKEY_GOST12_512 and SSL_PKEY_GOST12_256 indices can be used
1286 * with new (aGOST12-only) ciphersuites, we should find out which one is available really.
1287 */
1288 else if (idx == SSL_PKEY_GOST12_256) {
1289 int real_idx;
1290
1291 for (real_idx = SSL_PKEY_GOST12_512; real_idx >= SSL_PKEY_GOST12_256;
1292 real_idx--) {
1293 if (s->cert->pkeys[real_idx].privatekey != NULL) {
1294 idx = real_idx;
1295 break;
1296 }
1297 }
1298 }
7f6b466b
DSH		 1299 } else {
1300 idx = s->cert->key - s->cert->pkeys;
1301 }
1302 }
0972bc5c
DSH		 1303 if (idx < 0 || idx >= (int)OSSL_NELEM(tls_default_sigalg))
1304 return NULL;
1305 if (SSL_USE_SIGALGS(s) || idx != SSL_PKEY_RSA) {
263ff2c9 1306 const SIGALG_LOOKUP *lu = tls1_lookup_sigalg(s, tls_default_sigalg[idx]);
0972bc5c 1307
c8f6c28a 1308 if (!tls1_lookup_md(s->ctx, lu, NULL))
0972bc5c 1309 return NULL;
b0031e5d
KR		 1310 if (!tls12_sigalg_allowed(s, SSL_SECOP_SIGALG_SUPPORTED, lu))
1311 return NULL;
0972bc5c
DSH		 1312 return lu;
1313 }
b0031e5d
KR		 1314 if (!tls12_sigalg_allowed(s, SSL_SECOP_SIGALG_SUPPORTED, &legacy_rsa_sigalg))
1315 return NULL;
0972bc5c
DSH		 1316 return &legacy_rsa_sigalg;
1317}
1318/* Set peer sigalg based key type */
1319int tls1_set_peer_legacy_sigalg(SSL *s, const EVP_PKEY *pkey)
1320{
52fd27f9
DSH		 1321 size_t idx;
1322 const SIGALG_LOOKUP *lu;
0972bc5c 1323
52fd27f9
DSH		 1324 if (ssl_cert_lookup_by_pkey(pkey, &idx) == NULL)
1325 return 0;
1326 lu = tls1_get_legacy_sigalg(s, idx);
0972bc5c
DSH		 1327 if (lu == NULL)
1328 return 0;
555cbb32 1329 s->s3.tmp.peer_sigalg = lu;
0972bc5c
DSH		 1330 return 1;
1331}
703bcee0 1332
98c792d1 1333size_t tls12_get_psigalgs(SSL *s, int sent, const uint16_t **psigs)
0f113f3e
MC		 1334{
1335 /*
1336 * If Suite B mode use Suite B sigalgs only, ignore any other
1337 * preferences.
1338 */
e481f9b9 1339#ifndef OPENSSL_NO_EC
0f113f3e
MC		 1340 switch (tls1_suiteb(s)) {
1341 case SSL_CERT_FLAG_SUITEB_128_LOS:
1342 *psigs = suiteb_sigalgs;
7a531ee4 1343 return OSSL_NELEM(suiteb_sigalgs);
0f113f3e
MC		 1344
1345 case SSL_CERT_FLAG_SUITEB_128_LOS_ONLY:
1346 *psigs = suiteb_sigalgs;
7a531ee4 1347 return 1;
0f113f3e
MC		 1348
1349 case SSL_CERT_FLAG_SUITEB_192_LOS:
7a531ee4
MC		 1350 *psigs = suiteb_sigalgs + 1;
1351 return 1;
0f113f3e 1352 }
e481f9b9 1353#endif
a9669ddc
DSH		 1354 /*
1355 * We use client_sigalgs (if not NULL) if we're a server
1356 * and sending a certificate request or if we're a client and
1357 * determining which shared algorithm to use.
1358 */
1359 if ((s->server == sent) && s->cert->client_sigalgs != NULL) {
0f113f3e
MC		 1360 *psigs = s->cert->client_sigalgs;
1361 return s->cert->client_sigalgslen;
1362 } else if (s->cert->conf_sigalgs) {
1363 *psigs = s->cert->conf_sigalgs;
1364 return s->cert->conf_sigalgslen;
1365 } else {
1366 *psigs = tls12_sigalgs;
703bcee0 1367 return OSSL_NELEM(tls12_sigalgs);
0f113f3e
MC		 1368 }
1369}
1370
65d2c16c 1371#ifndef OPENSSL_NO_EC
de4dc598
MC		 1372/*
1373 * Called by servers only. Checks that we have a sig alg that supports the
1374 * specified EC curve.
1375 */
1376int tls_check_sigalg_curve(const SSL *s, int curve)
1377{
1378 const uint16_t *sigs;
1379 size_t siglen, i;
1380
1381 if (s->cert->conf_sigalgs) {
1382 sigs = s->cert->conf_sigalgs;
1383 siglen = s->cert->conf_sigalgslen;
1384 } else {
1385 sigs = tls12_sigalgs;
1386 siglen = OSSL_NELEM(tls12_sigalgs);
1387 }
1388
1389 for (i = 0; i < siglen; i++) {
263ff2c9 1390 const SIGALG_LOOKUP *lu = tls1_lookup_sigalg(s, sigs[i]);
de4dc598
MC		 1391
1392 if (lu == NULL)
1393 continue;
1394 if (lu->sig == EVP_PKEY_EC
1395 && lu->curve != NID_undef
1396 && curve == lu->curve)
1397 return 1;
1398 }
1399
1400 return 0;
1401}
65d2c16c 1402#endif
de4dc598 1403
620c97b6
KR		 1404/*
1405 * Return the number of security bits for the signature algorithm, or 0 on
1406 * error.
1407 */
1408static int sigalg_security_bits(SSL_CTX *ctx, const SIGALG_LOOKUP *lu)
1409{
1410 const EVP_MD *md = NULL;
1411 int secbits = 0;
1412
1413 if (!tls1_lookup_md(ctx, lu, &md))
1414 return 0;
1415 if (md != NULL)
1416 {
aba03ae5
KR		 1417 int md_type = EVP_MD_type(md);
1418
620c97b6
KR		 1419 /* Security bits: half digest bits */
1420 secbits = EVP_MD_size(md) * 4;
aba03ae5
KR		 1421 /*
1422 * SHA1 and MD5 are known to be broken. Reduce security bits so that
1423 * they're no longer accepted at security level 1. The real values don't
1424 * really matter as long as they're lower than 80, which is our
1425 * security level 1.
1426 * https://eprint.iacr.org/2020/014 puts a chosen-prefix attack for
1427 * SHA1 at 2^63.4 and MD5+SHA1 at 2^67.2
1428 * https://documents.epfl.ch/users/l/le/lenstra/public/papers/lat.pdf
1429 * puts a chosen-prefix attack for MD5 at 2^39.
1430 */
1431 if (md_type == NID_sha1)
1432 secbits = 64;
1433 else if (md_type == NID_md5_sha1)
1434 secbits = 67;
1435 else if (md_type == NID_md5)
1436 secbits = 39;
620c97b6
KR		 1437 } else {
1438 /* Values from https://tools.ietf.org/html/rfc8032#section-8.5 */
1439 if (lu->sigalg == TLSEXT_SIGALG_ed25519)
1440 secbits = 128;
1441 else if (lu->sigalg == TLSEXT_SIGALG_ed448)
1442 secbits = 224;
1443 }
1444 return secbits;
1445}
1446
0f113f3e
MC		 1447/*
1448 * Check signature algorithm is consistent with sent supported signature
b2eb6998
DSH		 1449 * algorithms and if so set relevant digest and signature scheme in
1450 * s.
ec4a50b3 1451 */
f742cda8 1452int tls12_check_peer_sigalg(SSL *s, uint16_t sig, EVP_PKEY *pkey)
0f113f3e 1453{
98c792d1 1454 const uint16_t *sent_sigs;
5554facb 1455 const EVP_MD *md = NULL;
703bcee0 1456 char sigalgstr[2];
11d2641f 1457 size_t sent_sigslen, i, cidx;
c2041da8 1458 int pkeyid = -1;
f742cda8 1459 const SIGALG_LOOKUP *lu;
620c97b6 1460 int secbits = 0;
4d43ee28 1461
c2041da8 1462 pkeyid = EVP_PKEY_id(pkey);
0f113f3e 1463 /* Should never happen */
536199ec 1464 if (pkeyid == -1)
0f113f3e 1465 return -1;
5a8916d9
DSH		 1466 if (SSL_IS_TLS13(s)) {
1467 /* Disallow DSA for TLS 1.3 */
1468 if (pkeyid == EVP_PKEY_DSA) {
f63a17d6
MC		 1469 SSLfatal(s, SSL_AD_ILLEGAL_PARAMETER, SSL_F_TLS12_CHECK_PEER_SIGALG,
1470 SSL_R_WRONG_SIGNATURE_TYPE);
5a8916d9
DSH		 1471 return 0;
1472 }
1473 /* Only allow PSS for TLS 1.3 */
1474 if (pkeyid == EVP_PKEY_RSA)
1475 pkeyid = EVP_PKEY_RSA_PSS;
1476 }
263ff2c9 1477 lu = tls1_lookup_sigalg(s, sig);
f742cda8 1478 /*
d8311fc9
MC		 1479 * Check sigalgs is known. Disallow SHA1/SHA224 with TLS 1.3. Check key type
1480 * is consistent with signature: RSA keys can be used for RSA-PSS
f742cda8 1481 */
d8311fc9
MC		 1482 if (lu == NULL
1483 || (SSL_IS_TLS13(s) && (lu->hash == NID_sha1 || lu->hash == NID_sha224))
095a982b 1484 || (pkeyid != lu->sig
f742cda8 1485 && (lu->sig != EVP_PKEY_RSA_PSS || pkeyid != EVP_PKEY_RSA))) {
f63a17d6
MC		 1486 SSLfatal(s, SSL_AD_ILLEGAL_PARAMETER, SSL_F_TLS12_CHECK_PEER_SIGALG,
1487 SSL_R_WRONG_SIGNATURE_TYPE);
0f113f3e
MC		 1488 return 0;
1489 }
11d2641f
MC		 1490 /* Check the sigalg is consistent with the key OID */
1491 if (!ssl_cert_lookup_by_nid(EVP_PKEY_id(pkey), &cidx)
1492 || lu->sig_idx != (int)cidx) {
1493 SSLfatal(s, SSL_AD_ILLEGAL_PARAMETER, SSL_F_TLS12_CHECK_PEER_SIGALG,
1494 SSL_R_WRONG_SIGNATURE_TYPE);
1495 return 0;
1496 }
1497
e481f9b9 1498#ifndef OPENSSL_NO_EC
fe3066ee 1499 if (pkeyid == EVP_PKEY_EC) {
44b6318f 1500
4a1b4280
DSH		 1501 /* Check point compression is permitted */
1502 if (!tls1_check_pkey_comp(s, pkey)) {
f63a17d6
MC		 1503 SSLfatal(s, SSL_AD_ILLEGAL_PARAMETER,
1504 SSL_F_TLS12_CHECK_PEER_SIGALG,
1505 SSL_R_ILLEGAL_POINT_COMPRESSION);
4a1b4280
DSH		 1506 return 0;
1507 }
1508
1509 /* For TLS 1.3 or Suite B check curve matches signature algorithm */
1510 if (SSL_IS_TLS13(s) || tls1_suiteb(s)) {
c2041da8 1511 int curve = evp_pkey_get_EC_KEY_curve_nid(pkey);
4a1b4280 1512
a34a9df0 1513 if (lu->curve != NID_undef && curve != lu->curve) {
f63a17d6
MC		 1514 SSLfatal(s, SSL_AD_ILLEGAL_PARAMETER,
1515 SSL_F_TLS12_CHECK_PEER_SIGALG, SSL_R_WRONG_CURVE);
8f88cb53
DSH		 1516 return 0;
1517 }
4a1b4280
DSH		 1518 }
1519 if (!SSL_IS_TLS13(s)) {
1520 /* Check curve matches extensions */
dcf8b01f 1521 if (!tls1_check_group_id(s, tls1_get_group_id(pkey), 1)) {
f63a17d6
MC		 1522 SSLfatal(s, SSL_AD_ILLEGAL_PARAMETER,
1523 SSL_F_TLS12_CHECK_PEER_SIGALG, SSL_R_WRONG_CURVE);
8f88cb53
DSH		 1524 return 0;
1525 }
8f88cb53 1526 if (tls1_suiteb(s)) {
f1adb006
DSH		 1527 /* Check sigalg matches a permissible Suite B value */
1528 if (sig != TLSEXT_SIGALG_ecdsa_secp256r1_sha256
1529 && sig != TLSEXT_SIGALG_ecdsa_secp384r1_sha384) {
f63a17d6
MC		 1530 SSLfatal(s, SSL_AD_HANDSHAKE_FAILURE,
1531 SSL_F_TLS12_CHECK_PEER_SIGALG,
1532 SSL_R_WRONG_SIGNATURE_TYPE);
0f113f3e 1533 return 0;
f1adb006 1534 }
8f88cb53 1535 }
0f113f3e 1536 }
8f88cb53 1537 } else if (tls1_suiteb(s)) {
f63a17d6
MC		 1538 SSLfatal(s, SSL_AD_HANDSHAKE_FAILURE, SSL_F_TLS12_CHECK_PEER_SIGALG,
1539 SSL_R_WRONG_SIGNATURE_TYPE);
0f113f3e 1540 return 0;
8f88cb53 1541 }
e481f9b9 1542#endif
0f113f3e
MC		 1543
1544 /* Check signature matches a type we sent */
a9669ddc 1545 sent_sigslen = tls12_get_psigalgs(s, 1, &sent_sigs);
536199ec 1546 for (i = 0; i < sent_sigslen; i++, sent_sigs++) {
703bcee0 1547 if (sig == *sent_sigs)
0f113f3e
MC		 1548 break;
1549 }
1550 /* Allow fallback to SHA1 if not strict mode */
f742cda8
DSH		 1551 if (i == sent_sigslen && (lu->hash != NID_sha1
1552 || s->cert->cert_flags & SSL_CERT_FLAGS_CHECK_TLS_STRICT)) {
f63a17d6
MC		 1553 SSLfatal(s, SSL_AD_HANDSHAKE_FAILURE, SSL_F_TLS12_CHECK_PEER_SIGALG,
1554 SSL_R_WRONG_SIGNATURE_TYPE);
0f113f3e
MC		 1555 return 0;
1556 }
c8f6c28a 1557 if (!tls1_lookup_md(s->ctx, lu, &md)) {
f63a17d6
MC		 1558 SSLfatal(s, SSL_AD_HANDSHAKE_FAILURE, SSL_F_TLS12_CHECK_PEER_SIGALG,
1559 SSL_R_UNKNOWN_DIGEST);
1560 return 0;
0f113f3e 1561 }
620c97b6
KR		 1562 /*
1563 * Make sure security callback allows algorithm. For historical
1564 * reasons we have to pass the sigalg as a two byte char array.
1565 */
1566 sigalgstr[0] = (sig >> 8) & 0xff;
1567 sigalgstr[1] = sig & 0xff;
1568 secbits = sigalg_security_bits(s->ctx, lu);
1569 if (secbits == 0 ||
1570 !ssl_security(s, SSL_SECOP_SIGALG_CHECK, secbits,
1571 md != NULL ? EVP_MD_type(md) : NID_undef,
1572 (void *)sigalgstr)) {
1573 SSLfatal(s, SSL_AD_HANDSHAKE_FAILURE, SSL_F_TLS12_CHECK_PEER_SIGALG,
1574 SSL_R_WRONG_SIGNATURE_TYPE);
1575 return 0;
0f113f3e 1576 }
6cbebb55 1577 /* Store the sigalg the peer uses */
555cbb32 1578 s->s3.tmp.peer_sigalg = lu;
0f113f3e
MC		 1579 return 1;
1580}
2ea80354 1581
42ef7aea
DSH		 1582int SSL_get_peer_signature_type_nid(const SSL *s, int *pnid)
1583{
555cbb32 1584 if (s->s3.tmp.peer_sigalg == NULL)
42ef7aea 1585 return 0;
555cbb32 1586 *pnid = s->s3.tmp.peer_sigalg->sig;
42ef7aea
DSH		 1587 return 1;
1588}
1589
a51c9f63
VD		 1590int SSL_get_signature_type_nid(const SSL *s, int *pnid)
1591{
555cbb32 1592 if (s->s3.tmp.sigalg == NULL)
a51c9f63 1593 return 0;
555cbb32 1594 *pnid = s->s3.tmp.sigalg->sig;
a51c9f63
VD		 1595 return 1;
1596}
1597
0f113f3e 1598/*
3eb2aff4
KR		 1599 * Set a mask of disabled algorithms: an algorithm is disabled if it isn't
1600 * supported, doesn't appear in supported signature algorithms, isn't supported
1601 * by the enabled protocol versions or by the security level.
1602 *
1603 * This function should only be used for checking which ciphers are supported
1604 * by the client.
1605 *
1606 * Call ssl_cipher_disabled() to check that it's enabled or not.
b7bfe69b 1607 */
1d0c08b4 1608int ssl_set_client_disabled(SSL *s)
0f113f3e 1609{
555cbb32
TS		 1610 s->s3.tmp.mask_a = 0;
1611 s->s3.tmp.mask_k = 0;
1612 ssl_set_sig_mask(&s->s3.tmp.mask_a, s, SSL_SECOP_SIGALG_MASK);
1613 if (ssl_get_min_max_version(s, &s->s3.tmp.min_ver,
1614 &s->s3.tmp.max_ver, NULL) != 0)
1d0c08b4 1615 return 0;
a230b26e 1616#ifndef OPENSSL_NO_PSK
0f113f3e
MC		 1617 /* with PSK there must be client callback set */
1618 if (!s->psk_client_callback) {
555cbb32
TS		 1619 s->s3.tmp.mask_a |= SSL_aPSK;
1620 s->s3.tmp.mask_k |= SSL_PSK;
0f113f3e 1621 }
a230b26e 1622#endif /* OPENSSL_NO_PSK */
e481f9b9 1623#ifndef OPENSSL_NO_SRP
0f113f3e 1624 if (!(s->srp_ctx.srp_Mask & SSL_kSRP)) {
555cbb32
TS		 1625 s->s3.tmp.mask_a |= SSL_aSRP;
1626 s->s3.tmp.mask_k |= SSL_kSRP;
0f113f3e 1627 }
e481f9b9 1628#endif
1d0c08b4 1629 return 1;
0f113f3e 1630}
fc101f88 1631
3eb2aff4
KR		 1632/*
1633 * ssl_cipher_disabled - check that a cipher is disabled or not
1634 * @s: SSL connection that you want to use the cipher on
1635 * @c: cipher to check
1636 * @op: Security check that you want to do
8af91fd9 1637 * @ecdhe: If set to 1 then TLSv1 ECDHE ciphers are also allowed in SSLv3
3eb2aff4
KR		 1638 *
1639 * Returns 1 when it's disabled, 0 when enabled.
1640 */
b0031e5d 1641int ssl_cipher_disabled(const SSL *s, const SSL_CIPHER *c, int op, int ecdhe)
0f113f3e 1642{
555cbb32
TS		 1643 if (c->algorithm_mkey & s->s3.tmp.mask_k
1644 || c->algorithm_auth & s->s3.tmp.mask_a)
0f113f3e 1645 return 1;
555cbb32 1646 if (s->s3.tmp.max_ver == 0)
3eb2aff4 1647 return 1;
8af91fd9
MC		 1648 if (!SSL_IS_DTLS(s)) {
1649 int min_tls = c->min_tls;
1650
1651 /*
1652 * For historical reasons we will allow ECHDE to be selected by a server
1653 * in SSLv3 if we are a client
1654 */
1655 if (min_tls == TLS1_VERSION && ecdhe
1656 && (c->algorithm_mkey & (SSL_kECDHE | SSL_kECDHEPSK)) != 0)
1657 min_tls = SSL3_VERSION;
1658
555cbb32 1659 if ((min_tls > s->s3.tmp.max_ver) || (c->max_tls < s->s3.tmp.min_ver))
8af91fd9
MC		 1660 return 1;
1661 }
555cbb32
TS		 1662 if (SSL_IS_DTLS(s) && (DTLS_VERSION_GT(c->min_dtls, s->s3.tmp.max_ver)
1663 || DTLS_VERSION_LT(c->max_dtls, s->s3.tmp.min_ver)))
3eb2aff4
KR		 1664 return 1;
1665
0f113f3e
MC		 1666 return !ssl_security(s, op, c->strength_bits, 0, (void *)c);
1667}
b362ccab 1668
7da160b0 1669int tls_use_ticket(SSL *s)
0f113f3e 1670{
08191294 1671 if ((s->options & SSL_OP_NO_TICKET))
0f113f3e
MC		 1672 return 0;
1673 return ssl_security(s, SSL_SECOP_TICKET, 0, 0, NULL);
1674}
ed3883d2 1675
e469af8d 1676int tls1_set_server_sigalgs(SSL *s)
0f113f3e 1677{
0f113f3e 1678 size_t i;
8483a003
F		 1679
1680 /* Clear any shared signature algorithms */
29948ac8
BK		 1681 OPENSSL_free(s->shared_sigalgs);
1682 s->shared_sigalgs = NULL;
1683 s->shared_sigalgslen = 0;
9195ddcd
DSH		 1684 /* Clear certificate validity flags */
1685 for (i = 0; i < SSL_PKEY_NUM; i++)
555cbb32 1686 s->s3.tmp.valid_flags[i] = 0;
a8bb912d
DSH		 1687 /*
1688 * If peer sent no signature algorithms check to see if we support
1689 * the default algorithm for each certificate type
1690 */
555cbb32
TS		 1691 if (s->s3.tmp.peer_cert_sigalgs == NULL
1692 && s->s3.tmp.peer_sigalgs == NULL) {
a8bb912d
DSH		 1693 const uint16_t *sent_sigs;
1694 size_t sent_sigslen = tls12_get_psigalgs(s, 1, &sent_sigs);
0f113f3e 1695
a8bb912d
DSH		 1696 for (i = 0; i < SSL_PKEY_NUM; i++) {
1697 const SIGALG_LOOKUP *lu = tls1_get_legacy_sigalg(s, i);
1698 size_t j;
1699
1700 if (lu == NULL)
1701 continue;
1702 /* Check default matches a type we sent */
1703 for (j = 0; j < sent_sigslen; j++) {
1704 if (lu->sigalg == sent_sigs[j]) {
555cbb32 1705 s->s3.tmp.valid_flags[i] = CERT_PKEY_SIGN;
a8bb912d
DSH		 1706 break;
1707 }
1708 }
1709 }
9195ddcd 1710 return 1;
a8bb912d 1711 }
9195ddcd
DSH		 1712
1713 if (!tls1_process_sigalgs(s)) {
f63a17d6
MC		 1714 SSLfatal(s, SSL_AD_INTERNAL_ERROR,
1715 SSL_F_TLS1_SET_SERVER_SIGALGS, ERR_R_INTERNAL_ERROR);
1716 return 0;
d376e57d 1717 }
29948ac8 1718 if (s->shared_sigalgs != NULL)
9195ddcd 1719 return 1;
f63a17d6 1720
fb34a0f4 1721 /* Fatal error if no shared signature algorithms */
f63a17d6
MC		 1722 SSLfatal(s, SSL_AD_HANDSHAKE_FAILURE, SSL_F_TLS1_SET_SERVER_SIGALGS,
1723 SSL_R_NO_SHARED_SIGNATURE_ALGORITHMS);
0f113f3e
MC		 1724 return 0;
1725}
e469af8d 1726
1d97c843 1727/*-
1ab3836b 1728 * Gets the ticket information supplied by the client if any.
e7f0d921 1729 *
1ab3836b 1730 * hello: The parsed ClientHello data
c519e89f
BM		 1731 * ret: (output) on return, if a ticket was decrypted, then this is set to
1732 * point to the resulting session.
6434abbf 1733 */
61fb5923 1734SSL_TICKET_STATUS tls_get_ticket_from_client(SSL *s, CLIENTHELLO_MSG *hello,
df0fed9a 1735 SSL_SESSION **ret)
0f113f3e 1736{
1ab3836b
MC		 1737 size_t size;
1738 RAW_EXTENSION *ticketext;
e7f0d921 1739
0f113f3e 1740 *ret = NULL;
aff8c126 1741 s->ext.ticket_expected = 0;
0f113f3e
MC		 1742
1743 /*
9362c93e
MC		 1744 * If tickets disabled or not supported by the protocol version
1745 * (e.g. TLSv1.3) behave as if no ticket present to permit stateful
0f113f3e
MC		 1746 * resumption.
1747 */
1ab3836b 1748 if (s->version <= SSL3_VERSION || !tls_use_ticket(s))
df0fed9a 1749 return SSL_TICKET_NONE;
9ceb2426 1750
70af3d8e
MC		 1751 ticketext = &hello->pre_proc_exts[TLSEXT_IDX_session_ticket];
1752 if (!ticketext->present)
df0fed9a 1753 return SSL_TICKET_NONE;
1ab3836b
MC		 1754
1755 size = PACKET_remaining(&ticketext->data);
70af3d8e 1756
c0638ade 1757 return tls_decrypt_ticket(s, PACKET_data(&ticketext->data), size,
70af3d8e 1758 hello->session_id, hello->session_id_len, ret);
1ab3836b
MC		 1759}
1760
1d97c843
TH		 1761/*-
1762 * tls_decrypt_ticket attempts to decrypt a session ticket.
c519e89f 1763 *
61fb5923
MC		 1764 * If s->tls_session_secret_cb is set and we're not doing TLSv1.3 then we are
1765 * expecting a pre-shared key ciphersuite, in which case we have no use for
1766 * session tickets and one will never be decrypted, nor will
1767 * s->ext.ticket_expected be set to 1.
1768 *
1769 * Side effects:
1770 * Sets s->ext.ticket_expected to 1 if the server will have to issue
1771 * a new session ticket to the client because the client indicated support
1772 * (and s->tls_session_secret_cb is NULL) but the client either doesn't have
1773 * a session ticket or we couldn't use the one it gave us, or if
1774 * s->ctx->ext.ticket_key_cb asked to renew the client's ticket.
1775 * Otherwise, s->ext.ticket_expected is set to 0.
1776 *
c519e89f 1777 * etick: points to the body of the session ticket extension.
8483a003 1778 * eticklen: the length of the session tickets extension.
c519e89f
BM		 1779 * sess_id: points at the session ID.
1780 * sesslen: the length of the session ID.
1781 * psess: (output) on return, if a ticket was decrypted, then this is set to
1782 * point to the resulting session.
c519e89f 1783 */
61fb5923 1784SSL_TICKET_STATUS tls_decrypt_ticket(SSL *s, const unsigned char *etick,
df0fed9a
TS		 1785 size_t eticklen, const unsigned char *sess_id,
1786 size_t sesslen, SSL_SESSION **psess)
0f113f3e 1787{
61fb5923 1788 SSL_SESSION *sess = NULL;
0f113f3e
MC		 1789 unsigned char *sdec;
1790 const unsigned char *p;
ddf6ec00 1791 int slen, renew_ticket = 0, declen;
61fb5923 1792 SSL_TICKET_STATUS ret = SSL_TICKET_FATAL_ERR_OTHER;
348240c6 1793 size_t mlen;
0f113f3e 1794 unsigned char tick_hmac[EVP_MAX_MD_SIZE];
a76ce286 1795 SSL_HMAC *hctx = NULL;
ee763495 1796 EVP_CIPHER_CTX *ctx = NULL;
222da979 1797 SSL_CTX *tctx = s->session_ctx;
e97763c9 1798
61fb5923
MC		 1799 if (eticklen == 0) {
1800 /*
1801 * The client will accept a ticket but doesn't currently have
1802 * one (TLSv1.2 and below), or treated as a fatal error in TLSv1.3
1803 */
1804 ret = SSL_TICKET_EMPTY;
1805 goto end;
1806 }
1807 if (!SSL_IS_TLS13(s) && s->ext.session_secret_cb) {
1808 /*
1809 * Indicate that the ticket couldn't be decrypted rather than
1810 * generating the session from ticket now, trigger
1811 * abbreviated handshake based on external mechanism to
1812 * calculate the master secret later.
1813 */
1814 ret = SSL_TICKET_NO_DECRYPT;
1815 goto end;
1816 }
1817
ee763495
MC		 1818 /* Need at least keyname + iv */
1819 if (eticklen < TLSEXT_KEYNAME_LENGTH + EVP_MAX_IV_LENGTH) {
df0fed9a 1820 ret = SSL_TICKET_NO_DECRYPT;
c0638ade 1821 goto end;
ee763495
MC		 1822 }
1823
0f113f3e 1824 /* Initialize session ticket encryption and HMAC contexts */
a76ce286 1825 hctx = ssl_hmac_new(tctx);
c0638ade
MC		 1826 if (hctx == NULL) {
1827 ret = SSL_TICKET_FATAL_ERR_MALLOC;
1828 goto end;
1829 }
846ec07d 1830 ctx = EVP_CIPHER_CTX_new();
35b1a433 1831 if (ctx == NULL) {
df0fed9a 1832 ret = SSL_TICKET_FATAL_ERR_MALLOC;
c0638ade 1833 goto end;
35b1a433 1834 }
a76ce286
P		 1835#ifndef OPENSSL_NO_DEPRECATED_3_0
1836 if (tctx->ext.ticket_key_evp_cb != NULL || tctx->ext.ticket_key_cb != NULL)
1837#else
1838 if (tctx->ext.ticket_key_evp_cb != NULL)
1839#endif
1840 {
0f113f3e 1841 unsigned char *nctick = (unsigned char *)etick;
a76ce286
P		 1842 int rv = 0;
1843
1844 if (tctx->ext.ticket_key_evp_cb != NULL)
1845 rv = tctx->ext.ticket_key_evp_cb(s, nctick,
1846 nctick + TLSEXT_KEYNAME_LENGTH,
1847 ctx,
1848 ssl_hmac_get0_EVP_MAC_CTX(hctx),
1849 0);
1850#ifndef OPENSSL_NO_DEPRECATED_3_0
1851 else if (tctx->ext.ticket_key_cb != NULL)
1852 /* if 0 is returned, write an empty ticket */
1853 rv = tctx->ext.ticket_key_cb(s, nctick,
ee763495 1854 nctick + TLSEXT_KEYNAME_LENGTH,
a76ce286
P		 1855 ctx, ssl_hmac_get0_HMAC_CTX(hctx), 0);
1856#endif
c0638ade
MC		 1857 if (rv < 0) {
1858 ret = SSL_TICKET_FATAL_ERR_OTHER;
1859 goto end;
1860 }
35b1a433 1861 if (rv == 0) {
df0fed9a 1862 ret = SSL_TICKET_NO_DECRYPT;
c0638ade 1863 goto end;
35b1a433 1864 }
0f113f3e
MC		 1865 if (rv == 2)
1866 renew_ticket = 1;
1867 } else {
148bfd26
MC		 1868 EVP_CIPHER *aes256cbc = NULL;
1869
0f113f3e 1870 /* Check key name matches */
aff8c126 1871 if (memcmp(etick, tctx->ext.tick_key_name,
ee763495 1872 TLSEXT_KEYNAME_LENGTH) != 0) {
df0fed9a 1873 ret = SSL_TICKET_NO_DECRYPT;
c0638ade 1874 goto end;
35b1a433 1875 }
148bfd26
MC		 1876
1877 aes256cbc = EVP_CIPHER_fetch(s->ctx->libctx, "AES-256-CBC",
1878 s->ctx->propq);
1879 if (aes256cbc == NULL
1880 || ssl_hmac_init(hctx, tctx->ext.secure->tick_hmac_key,
1881 sizeof(tctx->ext.secure->tick_hmac_key),
1882 "SHA256") <= 0
1883 || EVP_DecryptInit_ex(ctx, aes256cbc, NULL,
4bfb96f2 1884 tctx->ext.secure->tick_aes_key,
ee763495 1885 etick + TLSEXT_KEYNAME_LENGTH) <= 0) {
148bfd26 1886 EVP_CIPHER_free(aes256cbc);
c0638ade
MC		 1887 ret = SSL_TICKET_FATAL_ERR_OTHER;
1888 goto end;
a230b26e 1889 }
148bfd26 1890 EVP_CIPHER_free(aes256cbc);
c0638ade
MC		 1891 if (SSL_IS_TLS13(s))
1892 renew_ticket = 1;
0f113f3e
MC		 1893 }
1894 /*
1895 * Attempt to process session ticket, first conduct sanity and integrity
1896 * checks on ticket.
1897 */
a76ce286 1898 mlen = ssl_hmac_size(hctx);
348240c6 1899 if (mlen == 0) {
c0638ade
MC		 1900 ret = SSL_TICKET_FATAL_ERR_OTHER;
1901 goto end;
0f113f3e 1902 }
c0638ade 1903
e97763c9
DSH		 1904 /* Sanity check ticket length: must exceed keyname + IV + HMAC */
1905 if (eticklen <=
348240c6 1906 TLSEXT_KEYNAME_LENGTH + EVP_CIPHER_CTX_iv_length(ctx) + mlen) {
df0fed9a 1907 ret = SSL_TICKET_NO_DECRYPT;
c0638ade 1908 goto end;
e97763c9 1909 }
0f113f3e
MC		 1910 eticklen -= mlen;
1911 /* Check HMAC of encrypted ticket */
a76ce286
P		 1912 if (ssl_hmac_update(hctx, etick, eticklen) <= 0
1913 || ssl_hmac_final(hctx, tick_hmac, NULL, sizeof(tick_hmac)) <= 0) {
c0638ade
MC		 1914 ret = SSL_TICKET_FATAL_ERR_OTHER;
1915 goto end;
5f3d93e4 1916 }
c0638ade 1917
0f113f3e 1918 if (CRYPTO_memcmp(tick_hmac, etick + eticklen, mlen)) {
c0638ade
MC		 1919 ret = SSL_TICKET_NO_DECRYPT;
1920 goto end;
0f113f3e
MC		 1921 }
1922 /* Attempt to decrypt session data */
1923 /* Move p after IV to start of encrypted ticket, update length */
57b0d651
BE		 1924 p = etick + TLSEXT_KEYNAME_LENGTH + EVP_CIPHER_CTX_iv_length(ctx);
1925 eticklen -= TLSEXT_KEYNAME_LENGTH + EVP_CIPHER_CTX_iv_length(ctx);
0f113f3e 1926 sdec = OPENSSL_malloc(eticklen);
348240c6
MC		 1927 if (sdec == NULL || EVP_DecryptUpdate(ctx, sdec, &slen, p,
1928 (int)eticklen) <= 0) {
d1247df2 1929 OPENSSL_free(sdec);
c0638ade
MC		 1930 ret = SSL_TICKET_FATAL_ERR_OTHER;
1931 goto end;
0f113f3e 1932 }
348240c6 1933 if (EVP_DecryptFinal(ctx, sdec + slen, &declen) <= 0) {
0f113f3e 1934 OPENSSL_free(sdec);
c0638ade
MC		 1935 ret = SSL_TICKET_NO_DECRYPT;
1936 goto end;
0f113f3e 1937 }
348240c6 1938 slen += declen;
0f113f3e
MC		 1939 p = sdec;
1940
1941 sess = d2i_SSL_SESSION(NULL, &p, slen);
d3bc9805 1942 slen -= p - sdec;
0f113f3e
MC		 1943 OPENSSL_free(sdec);
1944 if (sess) {
79020b27 1945 /* Some additional consistency checks */
32305f88 1946 if (slen != 0) {
79020b27 1947 SSL_SESSION_free(sess);
5f96a95e 1948 sess = NULL;
c0638ade
MC		 1949 ret = SSL_TICKET_NO_DECRYPT;
1950 goto end;
79020b27 1951 }
0f113f3e
MC		 1952 /*
1953 * The session ID, if non-empty, is used by some clients to detect
1954 * that the ticket has been accepted. So we copy it to the session
1955 * structure. If it is empty set length to zero as required by
1956 * standard.
1957 */
32305f88 1958 if (sesslen) {
0f113f3e 1959 memcpy(sess->session_id, sess_id, sesslen);
32305f88
MC		 1960 sess->session_id_length = sesslen;
1961 }
0f113f3e 1962 if (renew_ticket)
c0638ade 1963 ret = SSL_TICKET_SUCCESS_RENEW;
0f113f3e 1964 else
c0638ade
MC		 1965 ret = SSL_TICKET_SUCCESS;
1966 goto end;
0f113f3e
MC		 1967 }
1968 ERR_clear_error();
1969 /*
1970 * For session parse failure, indicate that we need to send a new ticket.
1971 */
c0638ade
MC		 1972 ret = SSL_TICKET_NO_DECRYPT;
1973
1974 end:
846ec07d 1975 EVP_CIPHER_CTX_free(ctx);
a76ce286 1976 ssl_hmac_free(hctx);
c0638ade
MC		 1977
1978 /*
61fb5923
MC		 1979 * If set, the decrypt_ticket_cb() is called unless a fatal error was
1980 * detected above. The callback is responsible for checking |ret| before it
1981 * performs any action
c0638ade 1982 */
61fb5923
MC		 1983 if (s->session_ctx->decrypt_ticket_cb != NULL
1984 && (ret == SSL_TICKET_EMPTY
1985 || ret == SSL_TICKET_NO_DECRYPT
1986 || ret == SSL_TICKET_SUCCESS
1987 || ret == SSL_TICKET_SUCCESS_RENEW)) {
c0638ade 1988 size_t keyname_len = eticklen;
61fb5923 1989 int retcb;
c0638ade
MC		 1990
1991 if (keyname_len > TLSEXT_KEYNAME_LENGTH)
1992 keyname_len = TLSEXT_KEYNAME_LENGTH;
61fb5923
MC		 1993 retcb = s->session_ctx->decrypt_ticket_cb(s, sess, etick, keyname_len,
1994 ret,
1995 s->session_ctx->ticket_cb_data);
1996 switch (retcb) {
1997 case SSL_TICKET_RETURN_ABORT:
1998 ret = SSL_TICKET_FATAL_ERR_OTHER;
1999 break;
2000
2001 case SSL_TICKET_RETURN_IGNORE:
2002 ret = SSL_TICKET_NONE;
2003 SSL_SESSION_free(sess);
2004 sess = NULL;
2005 break;
2006
2007 case SSL_TICKET_RETURN_IGNORE_RENEW:
2008 if (ret != SSL_TICKET_EMPTY && ret != SSL_TICKET_NO_DECRYPT)
2009 ret = SSL_TICKET_NO_DECRYPT;
2010 /* else the value of |ret| will already do the right thing */
2011 SSL_SESSION_free(sess);
2012 sess = NULL;
2013 break;
2014
2015 case SSL_TICKET_RETURN_USE:
2016 case SSL_TICKET_RETURN_USE_RENEW:
2017 if (ret != SSL_TICKET_SUCCESS
2018 && ret != SSL_TICKET_SUCCESS_RENEW)
2019 ret = SSL_TICKET_FATAL_ERR_OTHER;
2020 else if (retcb == SSL_TICKET_RETURN_USE)
2021 ret = SSL_TICKET_SUCCESS;
2022 else
2023 ret = SSL_TICKET_SUCCESS_RENEW;
2024 break;
2025
2026 default:
2027 ret = SSL_TICKET_FATAL_ERR_OTHER;
2028 }
c0638ade
MC		 2029 }
2030
309371d6
MC		 2031 if (s->ext.session_secret_cb == NULL || SSL_IS_TLS13(s)) {
2032 switch (ret) {
2033 case SSL_TICKET_NO_DECRYPT:
2034 case SSL_TICKET_SUCCESS_RENEW:
2035 case SSL_TICKET_EMPTY:
2036 s->ext.ticket_expected = 1;
2037 }
c0638ade
MC		 2038 }
2039
61fb5923
MC		 2040 *psess = sess;
2041
2042 return ret;
0f113f3e 2043}
6434abbf 2044
b362ccab 2045/* Check to see if a signature algorithm is allowed */
b0031e5d 2046static int tls12_sigalg_allowed(const SSL *s, int op, const SIGALG_LOOKUP *lu)
0f113f3e 2047{
703bcee0 2048 unsigned char sigalgstr[2];
44b6318f 2049 int secbits;
703bcee0 2050
263ff2c9 2051 if (lu == NULL || !lu->enabled)
0f113f3e 2052 return 0;
224b4e37
DSH		 2053 /* DSA is not allowed in TLS 1.3 */
2054 if (SSL_IS_TLS13(s) && lu->sig == EVP_PKEY_DSA)
2055 return 0;
6ffeb269 2056 /* TODO(OpenSSL1.2) fully axe DSA/etc. in ClientHello per TLS 1.3 spec */
555cbb32 2057 if (!s->server && !SSL_IS_DTLS(s) && s->s3.tmp.min_ver >= TLS1_3_VERSION
6ffeb269
BK		 2058 && (lu->sig == EVP_PKEY_DSA || lu->hash_idx == SSL_MD_SHA1_IDX
2059 || lu->hash_idx == SSL_MD_MD5_IDX
2060 || lu->hash_idx == SSL_MD_SHA224_IDX))
2061 return 0;
871980a9 2062
0f113f3e 2063 /* See if public key algorithm allowed */
b8858aec 2064 if (ssl_cert_is_disabled(lu->sig_idx))
0f113f3e 2065 return 0;
871980a9
MC		 2066
2067 if (lu->sig == NID_id_GostR3410_2012_256
2068 || lu->sig == NID_id_GostR3410_2012_512
2069 || lu->sig == NID_id_GostR3410_2001) {
2070 /* We never allow GOST sig algs on the server with TLSv1.3 */
2071 if (s->server && SSL_IS_TLS13(s))
2072 return 0;
2073 if (!s->server
2074 && s->method->version == TLS_ANY_VERSION
555cbb32 2075 && s->s3.tmp.max_ver >= TLS1_3_VERSION) {
871980a9
MC		 2076 int i, num;
2077 STACK_OF(SSL_CIPHER) *sk;
2078
2079 /*
2080 * We're a client that could negotiate TLSv1.3. We only allow GOST
2081 * sig algs if we could negotiate TLSv1.2 or below and we have GOST
2082 * ciphersuites enabled.
2083 */
2084
555cbb32 2085 if (s->s3.tmp.min_ver >= TLS1_3_VERSION)
871980a9
MC		 2086 return 0;
2087
2088 sk = SSL_get_ciphers(s);
2089 num = sk != NULL ? sk_SSL_CIPHER_num(sk) : 0;
2090 for (i = 0; i < num; i++) {
2091 const SSL_CIPHER *c;
2092
2093 c = sk_SSL_CIPHER_value(sk, i);
2094 /* Skip disabled ciphers */
2095 if (ssl_cipher_disabled(s, c, SSL_SECOP_CIPHER_SUPPORTED, 0))
2096 continue;
2097
5a5530a2 2098 if ((c->algorithm_mkey & (SSL_kGOST | SSL_kGOST18)) != 0)
871980a9
MC		 2099 break;
2100 }
2101 if (i == num)
2102 return 0;
2103 }
2104 }
2105
0f113f3e 2106 /* Finally see if security callback allows it */
620c97b6 2107 secbits = sigalg_security_bits(s->ctx, lu);
b0e9ab95
DSH		 2108 sigalgstr[0] = (lu->sigalg >> 8) & 0xff;
2109 sigalgstr[1] = lu->sigalg & 0xff;
44b6318f 2110 return ssl_security(s, op, secbits, lu->hash, (void *)sigalgstr);
0f113f3e
MC		 2111}
2112
2113/*
2114 * Get a mask of disabled public key algorithms based on supported signature
2115 * algorithms. For example if no signature algorithm supports RSA then RSA is
2116 * disabled.
b362ccab
DSH		 2117 */
2118
90d9e49a 2119void ssl_set_sig_mask(uint32_t *pmask_a, SSL *s, int op)
0f113f3e 2120{
98c792d1 2121 const uint16_t *sigalgs;
0f113f3e 2122 size_t i, sigalgslen;
13cc2574 2123 uint32_t disabled_mask = SSL_aRSA | SSL_aDSS | SSL_aECDSA;
0f113f3e 2124 /*
13cc2574
DSH		 2125 * Go through all signature algorithms seeing if we support any
2126 * in disabled_mask.
0f113f3e 2127 */
a9669ddc 2128 sigalgslen = tls12_get_psigalgs(s, 1, &sigalgs);
b2555168 2129 for (i = 0; i < sigalgslen; i++, sigalgs++) {
263ff2c9 2130 const SIGALG_LOOKUP *lu = tls1_lookup_sigalg(s, *sigalgs);
13cc2574 2131 const SSL_CERT_LOOKUP *clu;
b0e9ab95
DSH		 2132
2133 if (lu == NULL)
2134 continue;
13cc2574
DSH		 2135
2136 clu = ssl_cert_lookup_by_idx(lu->sig_idx);
dd6b2706
P		 2137 if (clu == NULL)
2138 continue;
13cc2574
DSH		 2139
2140 /* If algorithm is disabled see if we can enable it */
2141 if ((clu->amask & disabled_mask) != 0
2142 && tls12_sigalg_allowed(s, op, lu))
2143 disabled_mask &= ~clu->amask;
0f113f3e 2144 }
13cc2574 2145 *pmask_a |= disabled_mask;
0f113f3e 2146}
b362ccab 2147
ae2f7b37 2148int tls12_copy_sigalgs(SSL *s, WPACKET *pkt,
98c792d1 2149 const uint16_t *psig, size_t psiglen)
2c7b4dbc
MC		 2150{
2151 size_t i;
b0e9ab95 2152 int rv = 0;
c0f9e23c 2153
703bcee0 2154 for (i = 0; i < psiglen; i++, psig++) {
263ff2c9 2155 const SIGALG_LOOKUP *lu = tls1_lookup_sigalg(s, *psig);
b0e9ab95
DSH		 2156
2157 if (!tls12_sigalg_allowed(s, SSL_SECOP_SIGALG_SUPPORTED, lu))
2158 continue;
2159 if (!WPACKET_put_bytes_u16(pkt, *psig))
2160 return 0;
2161 /*
2162 * If TLS 1.3 must have at least one valid TLS 1.3 message
d8311fc9 2163 * signing algorithm: i.e. neither RSA nor SHA1/SHA224
b0e9ab95
DSH		 2164 */
2165 if (rv == 0 && (!SSL_IS_TLS13(s)
d8311fc9
MC		 2166 || (lu->sig != EVP_PKEY_RSA
2167 && lu->hash != NID_sha1
2168 && lu->hash != NID_sha224)))
b0e9ab95 2169 rv = 1;
2c7b4dbc 2170 }
5528d68f
DSH		 2171 if (rv == 0)
2172 SSLerr(SSL_F_TLS12_COPY_SIGALGS, SSL_R_NO_SUITABLE_SIGNATURE_ALGORITHM);
b0e9ab95 2173 return rv;
2c7b4dbc
MC		 2174}
2175
4453cd8c 2176/* Given preference and allowed sigalgs set shared sigalgs */
4d43ee28 2177static size_t tls12_shared_sigalgs(SSL *s, const SIGALG_LOOKUP **shsig,
98c792d1
DSH		 2178 const uint16_t *pref, size_t preflen,
2179 const uint16_t *allow, size_t allowlen)
0f113f3e 2180{
98c792d1 2181 const uint16_t *ptmp, *atmp;
0f113f3e 2182 size_t i, j, nmatch = 0;
703bcee0 2183 for (i = 0, ptmp = pref; i < preflen; i++, ptmp++) {
263ff2c9 2184 const SIGALG_LOOKUP *lu = tls1_lookup_sigalg(s, *ptmp);
b0e9ab95 2185
0f113f3e 2186 /* Skip disabled hashes or signature algorithms */
b0e9ab95 2187 if (!tls12_sigalg_allowed(s, SSL_SECOP_SIGALG_SHARED, lu))
0f113f3e 2188 continue;
703bcee0
MC		 2189 for (j = 0, atmp = allow; j < allowlen; j++, atmp++) {
2190 if (*ptmp == *atmp) {
0f113f3e 2191 nmatch++;
b0e9ab95
DSH		 2192 if (shsig)
2193 *shsig++ = lu;
0f113f3e
MC		 2194 break;
2195 }
2196 }
2197 }
2198 return nmatch;
2199}
4453cd8c
DSH		 2200
2201/* Set shared signature algorithms for SSL structures */
2202static int tls1_set_shared_sigalgs(SSL *s)
0f113f3e 2203{
98c792d1 2204 const uint16_t *pref, *allow, *conf;
0f113f3e
MC		 2205 size_t preflen, allowlen, conflen;
2206 size_t nmatch;
4d43ee28 2207 const SIGALG_LOOKUP **salgs = NULL;
0f113f3e
MC		 2208 CERT *c = s->cert;
2209 unsigned int is_suiteb = tls1_suiteb(s);
b548a1f1 2210
29948ac8
BK		 2211 OPENSSL_free(s->shared_sigalgs);
2212 s->shared_sigalgs = NULL;
2213 s->shared_sigalgslen = 0;
0f113f3e
MC		 2214 /* If client use client signature algorithms if not NULL */
2215 if (!s->server && c->client_sigalgs && !is_suiteb) {
2216 conf = c->client_sigalgs;
2217 conflen = c->client_sigalgslen;
2218 } else if (c->conf_sigalgs && !is_suiteb) {
2219 conf = c->conf_sigalgs;
2220 conflen = c->conf_sigalgslen;
2221 } else
a9669ddc 2222 conflen = tls12_get_psigalgs(s, 0, &conf);
0f113f3e
MC		 2223 if (s->options & SSL_OP_CIPHER_SERVER_PREFERENCE || is_suiteb) {
2224 pref = conf;
2225 preflen = conflen;
555cbb32
TS		 2226 allow = s->s3.tmp.peer_sigalgs;
2227 allowlen = s->s3.tmp.peer_sigalgslen;
0f113f3e
MC		 2228 } else {
2229 allow = conf;
2230 allowlen = conflen;
555cbb32
TS		 2231 pref = s->s3.tmp.peer_sigalgs;
2232 preflen = s->s3.tmp.peer_sigalgslen;
0f113f3e
MC		 2233 }
2234 nmatch = tls12_shared_sigalgs(s, NULL, pref, preflen, allow, allowlen);
34e3edbf 2235 if (nmatch) {
cdb10bae
RS		 2236 if ((salgs = OPENSSL_malloc(nmatch * sizeof(*salgs))) == NULL) {
2237 SSLerr(SSL_F_TLS1_SET_SHARED_SIGALGS, ERR_R_MALLOC_FAILURE);
34e3edbf 2238 return 0;
cdb10bae 2239 }
34e3edbf
DSH		 2240 nmatch = tls12_shared_sigalgs(s, salgs, pref, preflen, allow, allowlen);
2241 } else {
2242 salgs = NULL;
2243 }
29948ac8
BK		 2244 s->shared_sigalgs = salgs;
2245 s->shared_sigalgslen = nmatch;
0f113f3e
MC		 2246 return 1;
2247}
4453cd8c 2248
9e84a42d 2249int tls1_save_u16(PACKET *pkt, uint16_t **pdest, size_t *pdestlen)
0f113f3e 2250{
98c792d1 2251 unsigned int stmp;
703bcee0 2252 size_t size, i;
9e84a42d 2253 uint16_t *buf;
0f113f3e 2254
703bcee0
MC		 2255 size = PACKET_remaining(pkt);
2256
2257 /* Invalid data length */
8f12296e 2258 if (size == 0 || (size & 1) != 0)
703bcee0
MC		 2259 return 0;
2260
2261 size >>= 1;
2262
cdb10bae
RS		 2263 if ((buf = OPENSSL_malloc(size * sizeof(*buf))) == NULL) {
2264 SSLerr(SSL_F_TLS1_SAVE_U16, ERR_R_MALLOC_FAILURE);
0f113f3e 2265 return 0;
cdb10bae 2266 }
98c792d1 2267 for (i = 0; i < size && PACKET_get_net_2(pkt, &stmp); i++)
9e84a42d 2268 buf[i] = stmp;
703bcee0 2269
9e84a42d
DSH		 2270 if (i != size) {
2271 OPENSSL_free(buf);
703bcee0 2272 return 0;
9e84a42d
DSH		 2273 }
2274
2275 OPENSSL_free(*pdest);
2276 *pdest = buf;
2277 *pdestlen = size;
703bcee0 2278
0f113f3e
MC		 2279 return 1;
2280}
6b7be581 2281
c589c34e 2282int tls1_save_sigalgs(SSL *s, PACKET *pkt, int cert)
9e84a42d
DSH		 2283{
2284 /* Extension ignored for inappropriate versions */
2285 if (!SSL_USE_SIGALGS(s))
2286 return 1;
2287 /* Should never happen */
2288 if (s->cert == NULL)
2289 return 0;
2290
c589c34e 2291 if (cert)
555cbb32
TS		 2292 return tls1_save_u16(pkt, &s->s3.tmp.peer_cert_sigalgs,
2293 &s->s3.tmp.peer_cert_sigalgslen);
c589c34e 2294 else
555cbb32
TS		 2295 return tls1_save_u16(pkt, &s->s3.tmp.peer_sigalgs,
2296 &s->s3.tmp.peer_sigalgslen);
9e84a42d 2297
9e84a42d
DSH		 2298}
2299
2300/* Set preferred digest for each key type */
2301
c800c27a 2302int tls1_process_sigalgs(SSL *s)
0f113f3e 2303{
0f113f3e 2304 size_t i;
555cbb32 2305 uint32_t *pvalid = s->s3.tmp.valid_flags;
4d43ee28 2306
0f113f3e
MC		 2307 if (!tls1_set_shared_sigalgs(s))
2308 return 0;
2309
9195ddcd
DSH		 2310 for (i = 0; i < SSL_PKEY_NUM; i++)
2311 pvalid[i] = 0;
2312
29948ac8
BK		 2313 for (i = 0; i < s->shared_sigalgslen; i++) {
2314 const SIGALG_LOOKUP *sigptr = s->shared_sigalgs[i];
9195ddcd 2315 int idx = sigptr->sig_idx;
4d43ee28 2316
523fb323 2317 /* Ignore PKCS1 based sig algs in TLSv1.3 */
4d43ee28 2318 if (SSL_IS_TLS13(s) && sigptr->sig == EVP_PKEY_RSA)
523fb323 2319 continue;
9195ddcd 2320 /* If not disabled indicate we can explicitly sign */
b8858aec
DSH		 2321 if (pvalid[idx] == 0 && !ssl_cert_is_disabled(idx))
2322 pvalid[idx] = CERT_PKEY_EXPLICIT_SIGN | CERT_PKEY_SIGN;
0f113f3e
MC		 2323 }
2324 return 1;
2325}
4817504d 2326
e7f8ff43 2327int SSL_get_sigalgs(SSL *s, int idx,
0f113f3e
MC		 2328 int *psign, int *phash, int *psignhash,
2329 unsigned char *rsig, unsigned char *rhash)
2330{
555cbb32
TS		 2331 uint16_t *psig = s->s3.tmp.peer_sigalgs;
2332 size_t numsigalgs = s->s3.tmp.peer_sigalgslen;
348240c6 2333 if (psig == NULL || numsigalgs > INT_MAX)
0f113f3e
MC		 2334 return 0;
2335 if (idx >= 0) {
4d43ee28
DSH		 2336 const SIGALG_LOOKUP *lu;
2337
703bcee0 2338 if (idx >= (int)numsigalgs)
0f113f3e
MC		 2339 return 0;
2340 psig += idx;
4d43ee28 2341 if (rhash != NULL)
536199ec 2342 *rhash = (unsigned char)((*psig >> 8) & 0xff);
4d43ee28 2343 if (rsig != NULL)
536199ec 2344 *rsig = (unsigned char)(*psig & 0xff);
263ff2c9 2345 lu = tls1_lookup_sigalg(s, *psig);
4d43ee28
DSH		 2346 if (psign != NULL)
2347 *psign = lu != NULL ? lu->sig : NID_undef;
2348 if (phash != NULL)
2349 *phash = lu != NULL ? lu->hash : NID_undef;
2350 if (psignhash != NULL)
2351 *psignhash = lu != NULL ? lu->sigandhash : NID_undef;
0f113f3e 2352 }
348240c6 2353 return (int)numsigalgs;
0f113f3e 2354}
4453cd8c
DSH		 2355
2356int SSL_get_shared_sigalgs(SSL *s, int idx,
0f113f3e
MC		 2357 int *psign, int *phash, int *psignhash,
2358 unsigned char *rsig, unsigned char *rhash)
2359{
4d43ee28 2360 const SIGALG_LOOKUP *shsigalgs;
29948ac8 2361 if (s->shared_sigalgs == NULL
6d047e06 2362 || idx < 0
29948ac8
BK		 2363 || idx >= (int)s->shared_sigalgslen
2364 || s->shared_sigalgslen > INT_MAX)
0f113f3e 2365 return 0;
29948ac8 2366 shsigalgs = s->shared_sigalgs[idx];
4d43ee28
DSH		 2367 if (phash != NULL)
2368 *phash = shsigalgs->hash;
2369 if (psign != NULL)
2370 *psign = shsigalgs->sig;
2371 if (psignhash != NULL)
2372 *psignhash = shsigalgs->sigandhash;
2373 if (rsig != NULL)
2374 *rsig = (unsigned char)(shsigalgs->sigalg & 0xff);
2375 if (rhash != NULL)
2376 *rhash = (unsigned char)((shsigalgs->sigalg >> 8) & 0xff);
29948ac8 2377 return (int)s->shared_sigalgslen;
0f113f3e
MC		 2378}
2379
787ebcaf
DSH		 2380/* Maximum possible number of unique entries in sigalgs array */
2381#define TLS_MAX_SIGALGCNT (OSSL_NELEM(sigalg_lookup_tbl) * 2)
0f229cce 2382
0f113f3e
MC		 2383typedef struct {
2384 size_t sigalgcnt;
fd5e1a8c
BK		 2385 /* TLSEXT_SIGALG_XXX values */
2386 uint16_t sigalgs[TLS_MAX_SIGALGCNT];
0f113f3e 2387} sig_cb_st;
0f229cce 2388
431f458d
DSH		 2389static void get_sigorhash(int *psig, int *phash, const char *str)
2390{
2391 if (strcmp(str, "RSA") == 0) {
2392 *psig = EVP_PKEY_RSA;
b2eb6998
DSH		 2393 } else if (strcmp(str, "RSA-PSS") == 0 || strcmp(str, "PSS") == 0) {
2394 *psig = EVP_PKEY_RSA_PSS;
431f458d
DSH		 2395 } else if (strcmp(str, "DSA") == 0) {
2396 *psig = EVP_PKEY_DSA;
2397 } else if (strcmp(str, "ECDSA") == 0) {
2398 *psig = EVP_PKEY_EC;
2399 } else {
2400 *phash = OBJ_sn2nid(str);
2401 if (*phash == NID_undef)
2402 *phash = OBJ_ln2nid(str);
2403 }
2404}
787ebcaf
DSH		 2405/* Maximum length of a signature algorithm string component */
2406#define TLS_MAX_SIGSTRING_LEN 40
431f458d 2407
0f229cce 2408static int sig_cb(const char *elem, int len, void *arg)
0f113f3e
MC		 2409{
2410 sig_cb_st *sarg = arg;
2411 size_t i;
fd5e1a8c 2412 const SIGALG_LOOKUP *s;
787ebcaf 2413 char etmp[TLS_MAX_SIGSTRING_LEN], *p;
431f458d 2414 int sig_alg = NID_undef, hash_alg = NID_undef;
2747d73c
KR		 2415 if (elem == NULL)
2416 return 0;
787ebcaf 2417 if (sarg->sigalgcnt == TLS_MAX_SIGALGCNT)
0f113f3e
MC		 2418 return 0;
2419 if (len > (int)(sizeof(etmp) - 1))
2420 return 0;
2421 memcpy(etmp, elem, len);
2422 etmp[len] = 0;
2423 p = strchr(etmp, '+');
fd5e1a8c
BK		 2424 /*
2425 * We only allow SignatureSchemes listed in the sigalg_lookup_tbl;
2426 * if there's no '+' in the provided name, look for the new-style combined
2427 * name. If not, match both sig+hash to find the needed SIGALG_LOOKUP.
2428 * Just sig+hash is not unique since TLS 1.3 adds rsa_pss_pss_* and
2429 * rsa_pss_rsae_* that differ only by public key OID; in such cases
2430 * we will pick the _rsae_ variant, by virtue of them appearing earlier
2431 * in the table.
2432 */
8a43a42a 2433 if (p == NULL) {
8a43a42a
DSH		 2434 for (i = 0, s = sigalg_lookup_tbl; i < OSSL_NELEM(sigalg_lookup_tbl);
2435 i++, s++) {
2436 if (s->name != NULL && strcmp(etmp, s->name) == 0) {
fd5e1a8c 2437 sarg->sigalgs[sarg->sigalgcnt++] = s->sigalg;
8a43a42a
DSH		 2438 break;
2439 }
2440 }
fd5e1a8c
BK		 2441 if (i == OSSL_NELEM(sigalg_lookup_tbl))
2442 return 0;
8a43a42a
DSH		 2443 } else {
2444 *p = 0;
2445 p++;
2446 if (*p == 0)
2447 return 0;
2448 get_sigorhash(&sig_alg, &hash_alg, etmp);
2449 get_sigorhash(&sig_alg, &hash_alg, p);
fd5e1a8c
BK		 2450 if (sig_alg == NID_undef || hash_alg == NID_undef)
2451 return 0;
2452 for (i = 0, s = sigalg_lookup_tbl; i < OSSL_NELEM(sigalg_lookup_tbl);
2453 i++, s++) {
2454 if (s->hash == hash_alg && s->sig == sig_alg) {
2455 sarg->sigalgs[sarg->sigalgcnt++] = s->sigalg;
2456 break;
2457 }
2458 }
2459 if (i == OSSL_NELEM(sigalg_lookup_tbl))
2460 return 0;
8a43a42a 2461 }
0f113f3e 2462
fd5e1a8c
BK		 2463 /* Reject duplicates */
2464 for (i = 0; i < sarg->sigalgcnt - 1; i++) {
c1acef92 2465 if (sarg->sigalgs[i] == sarg->sigalgs[sarg->sigalgcnt - 1]) {
fd5e1a8c 2466 sarg->sigalgcnt--;
0f113f3e 2467 return 0;
fd5e1a8c 2468 }
0f113f3e 2469 }
0f113f3e
MC		 2470 return 1;
2471}
2472
2473/*
9d22666e 2474 * Set supported signature algorithms based on a colon separated list of the
0f113f3e
MC		 2475 * form sig+hash e.g. RSA+SHA512:DSA+SHA512
2476 */
3dbc46df 2477int tls1_set_sigalgs_list(CERT *c, const char *str, int client)
0f113f3e
MC		 2478{
2479 sig_cb_st sig;
2480 sig.sigalgcnt = 0;
2481 if (!CONF_parse_list(str, ':', 1, sig_cb, &sig))
2482 return 0;
2483 if (c == NULL)
2484 return 1;
fd5e1a8c
BK		 2485 return tls1_set_raw_sigalgs(c, sig.sigalgs, sig.sigalgcnt, client);
2486}
2487
2488int tls1_set_raw_sigalgs(CERT *c, const uint16_t *psigs, size_t salglen,
2489 int client)
2490{
2491 uint16_t *sigalgs;
2492
cdb10bae
RS		 2493 if ((sigalgs = OPENSSL_malloc(salglen * sizeof(*sigalgs))) == NULL) {
2494 SSLerr(SSL_F_TLS1_SET_RAW_SIGALGS, ERR_R_MALLOC_FAILURE);
fd5e1a8c 2495 return 0;
cdb10bae 2496 }
fd5e1a8c
BK		 2497 memcpy(sigalgs, psigs, salglen * sizeof(*sigalgs));
2498
2499 if (client) {
2500 OPENSSL_free(c->client_sigalgs);
2501 c->client_sigalgs = sigalgs;
2502 c->client_sigalgslen = salglen;
2503 } else {
2504 OPENSSL_free(c->conf_sigalgs);
2505 c->conf_sigalgs = sigalgs;
2506 c->conf_sigalgslen = salglen;
2507 }
2508
2509 return 1;
0f113f3e
MC		 2510}
2511
a230b26e 2512int tls1_set_sigalgs(CERT *c, const int *psig_nids, size_t salglen, int client)
0f113f3e 2513{
98c792d1 2514 uint16_t *sigalgs, *sptr;
0f113f3e 2515 size_t i;
63c1df09 2516
0f113f3e
MC		 2517 if (salglen & 1)
2518 return 0;
cdb10bae
RS		 2519 if ((sigalgs = OPENSSL_malloc((salglen / 2) * sizeof(*sigalgs))) == NULL) {
2520 SSLerr(SSL_F_TLS1_SET_SIGALGS, ERR_R_MALLOC_FAILURE);
0f113f3e 2521 return 0;
cdb10bae 2522 }
0f113f3e 2523 for (i = 0, sptr = sigalgs; i < salglen; i += 2) {
63c1df09 2524 size_t j;
7a531ee4 2525 const SIGALG_LOOKUP *curr;
63c1df09
MC		 2526 int md_id = *psig_nids++;
2527 int sig_id = *psig_nids++;
2528
2529 for (j = 0, curr = sigalg_lookup_tbl; j < OSSL_NELEM(sigalg_lookup_tbl);
2530 j++, curr++) {
fe3066ee 2531 if (curr->hash == md_id && curr->sig == sig_id) {
63c1df09
MC		 2532 *sptr++ = curr->sigalg;
2533 break;
2534 }
2535 }
0f113f3e 2536
63c1df09 2537 if (j == OSSL_NELEM(sigalg_lookup_tbl))
0f113f3e 2538 goto err;
0f113f3e
MC		 2539 }
2540
2541 if (client) {
b548a1f1 2542 OPENSSL_free(c->client_sigalgs);
0f113f3e 2543 c->client_sigalgs = sigalgs;
7a531ee4 2544 c->client_sigalgslen = salglen / 2;
0f113f3e 2545 } else {
b548a1f1 2546 OPENSSL_free(c->conf_sigalgs);
0f113f3e 2547 c->conf_sigalgs = sigalgs;
7a531ee4 2548 c->conf_sigalgslen = salglen / 2;
0f113f3e
MC		 2549 }
2550
2551 return 1;
2552
2553 err:
2554 OPENSSL_free(sigalgs);
2555 return 0;
2556}
4453cd8c 2557
29948ac8 2558static int tls1_check_sig_alg(SSL *s, X509 *x, int default_nid)
0f113f3e 2559{
5235ef44 2560 int sig_nid, use_pc_sigalgs = 0;
0f113f3e 2561 size_t i;
5235ef44
MC		 2562 const SIGALG_LOOKUP *sigalg;
2563 size_t sigalgslen;
0f113f3e
MC		 2564 if (default_nid == -1)
2565 return 1;
2566 sig_nid = X509_get_signature_nid(x);
2567 if (default_nid)
2568 return sig_nid == default_nid ? 1 : 0;
5235ef44
MC		 2569
2570 if (SSL_IS_TLS13(s) && s->s3.tmp.peer_cert_sigalgs != NULL) {
2571 /*
2572 * If we're in TLSv1.3 then we only get here if we're checking the
2573 * chain. If the peer has specified peer_cert_sigalgs then we use them
2574 * otherwise we default to normal sigalgs.
2575 */
2576 sigalgslen = s->s3.tmp.peer_cert_sigalgslen;
2577 use_pc_sigalgs = 1;
2578 } else {
2579 sigalgslen = s->shared_sigalgslen;
2580 }
2581 for (i = 0; i < sigalgslen; i++) {
2582 sigalg = use_pc_sigalgs
263ff2c9 2583 ? tls1_lookup_sigalg(s, s->s3.tmp.peer_cert_sigalgs[i])
5235ef44 2584 : s->shared_sigalgs[i];
a87f3fe0 2585 if (sigalg != NULL && sig_nid == sigalg->sigandhash)
0f113f3e 2586 return 1;
5235ef44 2587 }
0f113f3e
MC		 2588 return 0;
2589}
2590
6dbb6219
DSH		 2591/* Check to see if a certificate issuer name matches list of CA names */
2592static int ssl_check_ca_name(STACK_OF(X509_NAME) *names, X509 *x)
0f113f3e 2593{
8cc86b81 2594 const X509_NAME *nm;
0f113f3e
MC		 2595 int i;
2596 nm = X509_get_issuer_name(x);
2597 for (i = 0; i < sk_X509_NAME_num(names); i++) {
2598 if (!X509_NAME_cmp(nm, sk_X509_NAME_value(names, i)))
2599 return 1;
2600 }
2601 return 0;
2602}
2603
2604/*
2605 * Check certificate chain is consistent with TLS extensions and is usable by
2606 * server. This servers two purposes: it allows users to check chains before
2607 * passing them to the server and it allows the server to check chains before
2608 * attempting to use them.
d61ff83b 2609 */
6dbb6219 2610
69687aa8 2611/* Flags which need to be set for a certificate when strict mode not set */
6dbb6219 2612
e481f9b9 2613#define CERT_PKEY_VALID_FLAGS \
0f113f3e 2614 (CERT_PKEY_EE_SIGNATURE|CERT_PKEY_EE_PARAM)
6dbb6219 2615/* Strict mode flags */
e481f9b9 2616#define CERT_PKEY_STRICT_FLAGS \
0f113f3e
MC		 2617 (CERT_PKEY_VALID_FLAGS|CERT_PKEY_CA_SIGNATURE|CERT_PKEY_CA_PARAM \
2618 | CERT_PKEY_ISSUER_NAME|CERT_PKEY_CERT_TYPE)
6dbb6219 2619
d61ff83b 2620int tls1_check_chain(SSL *s, X509 *x, EVP_PKEY *pk, STACK_OF(X509) *chain,
0f113f3e
MC		 2621 int idx)
2622{
2623 int i;
2624 int rv = 0;
2625 int check_flags = 0, strict_mode;
2626 CERT_PKEY *cpk = NULL;
2627 CERT *c = s->cert;
f7d53487 2628 uint32_t *pvalid;
0f113f3e
MC		 2629 unsigned int suiteb_flags = tls1_suiteb(s);
2630 /* idx == -1 means checking server chains */
2631 if (idx != -1) {
2632 /* idx == -2 means checking client certificate chains */
2633 if (idx == -2) {
2634 cpk = c->key;
348240c6 2635 idx = (int)(cpk - c->pkeys);
0f113f3e
MC		 2636 } else
2637 cpk = c->pkeys + idx;
555cbb32 2638 pvalid = s->s3.tmp.valid_flags + idx;
0f113f3e
MC		 2639 x = cpk->x509;
2640 pk = cpk->privatekey;
2641 chain = cpk->chain;
2642 strict_mode = c->cert_flags & SSL_CERT_FLAGS_CHECK_TLS_STRICT;
2643 /* If no cert or key, forget it */
2644 if (!x || !pk)
2645 goto end;
0f113f3e 2646 } else {
52fd27f9
DSH		 2647 size_t certidx;
2648
0f113f3e 2649 if (!x || !pk)
d813f9eb 2650 return 0;
52fd27f9
DSH		 2651
2652 if (ssl_cert_lookup_by_pkey(pk, &certidx) == NULL)
d813f9eb 2653 return 0;
52fd27f9 2654 idx = certidx;
555cbb32 2655 pvalid = s->s3.tmp.valid_flags + idx;
6383d316 2656
0f113f3e
MC		 2657 if (c->cert_flags & SSL_CERT_FLAGS_CHECK_TLS_STRICT)
2658 check_flags = CERT_PKEY_STRICT_FLAGS;
2659 else
2660 check_flags = CERT_PKEY_VALID_FLAGS;
2661 strict_mode = 1;
2662 }
2663
2664 if (suiteb_flags) {
2665 int ok;
2666 if (check_flags)
2667 check_flags |= CERT_PKEY_SUITEB;
2668 ok = X509_chain_check_suiteb(NULL, x, chain, suiteb_flags);
2669 if (ok == X509_V_OK)
2670 rv |= CERT_PKEY_SUITEB;
2671 else if (!check_flags)
2672 goto end;
2673 }
2674
2675 /*
2676 * Check all signature algorithms are consistent with signature
2677 * algorithms extension if TLS 1.2 or later and strict mode.
2678 */
2679 if (TLS1_get_version(s) >= TLS1_2_VERSION && strict_mode) {
2680 int default_nid;
536199ec 2681 int rsign = 0;
555cbb32
TS		 2682 if (s->s3.tmp.peer_cert_sigalgs != NULL
2683 || s->s3.tmp.peer_sigalgs != NULL) {
0f113f3e
MC		 2684 default_nid = 0;
2685 /* If no sigalgs extension use defaults from RFC5246 */
c589c34e 2686 } else {
0f113f3e 2687 switch (idx) {
d0ff28f8 2688 case SSL_PKEY_RSA:
536199ec 2689 rsign = EVP_PKEY_RSA;
0f113f3e
MC		 2690 default_nid = NID_sha1WithRSAEncryption;
2691 break;
2692
2693 case SSL_PKEY_DSA_SIGN:
536199ec 2694 rsign = EVP_PKEY_DSA;
0f113f3e
MC		 2695 default_nid = NID_dsaWithSHA1;
2696 break;
2697
2698 case SSL_PKEY_ECC:
536199ec 2699 rsign = EVP_PKEY_EC;
0f113f3e
MC		 2700 default_nid = NID_ecdsa_with_SHA1;
2701 break;
2702
e44380a9 2703 case SSL_PKEY_GOST01:
536199ec 2704 rsign = NID_id_GostR3410_2001;
e44380a9
DB		 2705 default_nid = NID_id_GostR3411_94_with_GostR3410_2001;
2706 break;
2707
2708 case SSL_PKEY_GOST12_256:
536199ec 2709 rsign = NID_id_GostR3410_2012_256;
e44380a9
DB		 2710 default_nid = NID_id_tc26_signwithdigest_gost3410_2012_256;
2711 break;
2712
2713 case SSL_PKEY_GOST12_512:
536199ec 2714 rsign = NID_id_GostR3410_2012_512;
e44380a9
DB		 2715 default_nid = NID_id_tc26_signwithdigest_gost3410_2012_512;
2716 break;
2717
0f113f3e
MC		 2718 default:
2719 default_nid = -1;
2720 break;
2721 }
2722 }
2723 /*
2724 * If peer sent no signature algorithms extension and we have set
2725 * preferred signature algorithms check we support sha1.
2726 */
2727 if (default_nid > 0 && c->conf_sigalgs) {
2728 size_t j;
98c792d1 2729 const uint16_t *p = c->conf_sigalgs;
703bcee0 2730 for (j = 0; j < c->conf_sigalgslen; j++, p++) {
263ff2c9 2731 const SIGALG_LOOKUP *lu = tls1_lookup_sigalg(s, *p);
44b6318f
DSH		 2732
2733 if (lu != NULL && lu->hash == NID_sha1 && lu->sig == rsign)
0f113f3e
MC		 2734 break;
2735 }
2736 if (j == c->conf_sigalgslen) {
2737 if (check_flags)
2738 goto skip_sigs;
2739 else
2740 goto end;
2741 }
2742 }
2743 /* Check signature algorithm of each cert in chain */
5235ef44
MC		 2744 if (SSL_IS_TLS13(s)) {
2745 /*
2746 * We only get here if the application has called SSL_check_chain(),
2747 * so check_flags is always set.
2748 */
2749 if (find_sig_alg(s, x, pk) != NULL)
2750 rv |= CERT_PKEY_EE_SIGNATURE;
2751 } else if (!tls1_check_sig_alg(s, x, default_nid)) {
0f113f3e
MC		 2752 if (!check_flags)
2753 goto end;
2754 } else
2755 rv |= CERT_PKEY_EE_SIGNATURE;
2756 rv |= CERT_PKEY_CA_SIGNATURE;
2757 for (i = 0; i < sk_X509_num(chain); i++) {
29948ac8 2758 if (!tls1_check_sig_alg(s, sk_X509_value(chain, i), default_nid)) {
0f113f3e
MC		 2759 if (check_flags) {
2760 rv &= ~CERT_PKEY_CA_SIGNATURE;
2761 break;
2762 } else
2763 goto end;
2764 }
2765 }
2766 }
2767 /* Else not TLS 1.2, so mark EE and CA signing algorithms OK */
2768 else if (check_flags)
2769 rv |= CERT_PKEY_EE_SIGNATURE | CERT_PKEY_CA_SIGNATURE;
2770 skip_sigs:
2771 /* Check cert parameters are consistent */
9195ddcd 2772 if (tls1_check_cert_param(s, x, 1))
0f113f3e
MC		 2773 rv |= CERT_PKEY_EE_PARAM;
2774 else if (!check_flags)
2775 goto end;
2776 if (!s->server)
2777 rv |= CERT_PKEY_CA_PARAM;
2778 /* In strict mode check rest of chain too */
2779 else if (strict_mode) {
2780 rv |= CERT_PKEY_CA_PARAM;
2781 for (i = 0; i < sk_X509_num(chain); i++) {
2782 X509 *ca = sk_X509_value(chain, i);
2783 if (!tls1_check_cert_param(s, ca, 0)) {
2784 if (check_flags) {
2785 rv &= ~CERT_PKEY_CA_PARAM;
2786 break;
2787 } else
2788 goto end;
2789 }
2790 }
2791 }
2792 if (!s->server && strict_mode) {
2793 STACK_OF(X509_NAME) *ca_dn;
2794 int check_type = 0;
c2041da8
RL		 2795
2796 if (EVP_PKEY_is_a(pk, "RSA"))
0f113f3e 2797 check_type = TLS_CT_RSA_SIGN;
c2041da8 2798 else if (EVP_PKEY_is_a(pk, "DSA"))
0f113f3e 2799 check_type = TLS_CT_DSS_SIGN;
c2041da8 2800 else if (EVP_PKEY_is_a(pk, "EC"))
0f113f3e 2801 check_type = TLS_CT_ECDSA_SIGN;
c2041da8 2802
0f113f3e 2803 if (check_type) {
555cbb32 2804 const uint8_t *ctypes = s->s3.tmp.ctype;
75c13e78
DSH		 2805 size_t j;
2806
555cbb32 2807 for (j = 0; j < s->s3.tmp.ctype_len; j++, ctypes++) {
75c13e78 2808 if (*ctypes == check_type) {
0f113f3e
MC		 2809 rv |= CERT_PKEY_CERT_TYPE;
2810 break;
2811 }
2812 }
2813 if (!(rv & CERT_PKEY_CERT_TYPE) && !check_flags)
2814 goto end;
75c13e78 2815 } else {
0f113f3e 2816 rv |= CERT_PKEY_CERT_TYPE;
75c13e78 2817 }
0f113f3e 2818
555cbb32 2819 ca_dn = s->s3.tmp.peer_ca_names;
0f113f3e
MC		 2820
2821 if (!sk_X509_NAME_num(ca_dn))
2822 rv |= CERT_PKEY_ISSUER_NAME;
2823
2824 if (!(rv & CERT_PKEY_ISSUER_NAME)) {
2825 if (ssl_check_ca_name(ca_dn, x))
2826 rv |= CERT_PKEY_ISSUER_NAME;
2827 }
2828 if (!(rv & CERT_PKEY_ISSUER_NAME)) {
2829 for (i = 0; i < sk_X509_num(chain); i++) {
2830 X509 *xtmp = sk_X509_value(chain, i);
2831 if (ssl_check_ca_name(ca_dn, xtmp)) {
2832 rv |= CERT_PKEY_ISSUER_NAME;
2833 break;
2834 }
2835 }
2836 }
2837 if (!check_flags && !(rv & CERT_PKEY_ISSUER_NAME))
2838 goto end;
2839 } else
2840 rv |= CERT_PKEY_ISSUER_NAME | CERT_PKEY_CERT_TYPE;
2841
2842 if (!check_flags || (rv & check_flags) == check_flags)
2843 rv |= CERT_PKEY_VALID;
2844
2845 end:
2846
a8bb912d
DSH		 2847 if (TLS1_get_version(s) >= TLS1_2_VERSION)
2848 rv |= *pvalid & (CERT_PKEY_EXPLICIT_SIGN | CERT_PKEY_SIGN);
2849 else
0f113f3e
MC		 2850 rv |= CERT_PKEY_SIGN | CERT_PKEY_EXPLICIT_SIGN;
2851
2852 /*
2853 * When checking a CERT_PKEY structure all flags are irrelevant if the
2854 * chain is invalid.
2855 */
2856 if (!check_flags) {
a8bb912d 2857 if (rv & CERT_PKEY_VALID) {
6383d316 2858 *pvalid = rv;
a8bb912d
DSH		 2859 } else {
2860 /* Preserve sign and explicit sign flag, clear rest */
2861 *pvalid &= CERT_PKEY_EXPLICIT_SIGN | CERT_PKEY_SIGN;
0f113f3e
MC		 2862 return 0;
2863 }
2864 }
2865 return rv;
2866}
d61ff83b
DSH		 2867
2868/* Set validity of certificates in an SSL structure */
2869void tls1_set_cert_validity(SSL *s)
0f113f3e 2870{
d0ff28f8 2871 tls1_check_chain(s, NULL, NULL, NULL, SSL_PKEY_RSA);
045d078a 2872 tls1_check_chain(s, NULL, NULL, NULL, SSL_PKEY_RSA_PSS_SIGN);
17dd65e6 2873 tls1_check_chain(s, NULL, NULL, NULL, SSL_PKEY_DSA_SIGN);
17dd65e6 2874 tls1_check_chain(s, NULL, NULL, NULL, SSL_PKEY_ECC);
e44380a9
DB		 2875 tls1_check_chain(s, NULL, NULL, NULL, SSL_PKEY_GOST01);
2876 tls1_check_chain(s, NULL, NULL, NULL, SSL_PKEY_GOST12_256);
2877 tls1_check_chain(s, NULL, NULL, NULL, SSL_PKEY_GOST12_512);
3d234c9e 2878 tls1_check_chain(s, NULL, NULL, NULL, SSL_PKEY_ED25519);
0e1d6ecf 2879 tls1_check_chain(s, NULL, NULL, NULL, SSL_PKEY_ED448);
0f113f3e
MC		 2880}
2881
69687aa8 2882/* User level utility function to check a chain is suitable */
18d71588 2883int SSL_check_chain(SSL *s, X509 *x, EVP_PKEY *pk, STACK_OF(X509) *chain)
0f113f3e
MC		 2884{
2885 return tls1_check_chain(s, x, pk, chain, -1);
2886}
d61ff83b 2887
09599b52
DSH		 2888#ifndef OPENSSL_NO_DH
2889DH *ssl_get_auto_dh(SSL *s)
0f113f3e 2890{
7646610b
HK		 2891 DH *dhp;
2892 BIGNUM *p, *g;
0f113f3e 2893 int dh_secbits = 80;
7646610b
HK		 2894 if (s->cert->dh_tmp_auto != 2) {
2895 if (s->s3.tmp.new_cipher->algorithm_auth & (SSL_aNULL | SSL_aPSK)) {
2896 if (s->s3.tmp.new_cipher->strength_bits == 256)
2897 dh_secbits = 128;
2898 else
2899 dh_secbits = 80;
2900 } else {
2901 if (s->s3.tmp.cert == NULL)
2902 return NULL;
2903 dh_secbits = EVP_PKEY_security_bits(s->s3.tmp.cert->privatekey);
2904 }
0f113f3e
MC		 2905 }
2906
7646610b
HK		 2907 dhp = DH_new();
2908 if (dhp == NULL)
2909 return NULL;
2910 g = BN_new();
2911 if (g == NULL || !BN_set_word(g, 2)) {
2912 DH_free(dhp);
2913 BN_free(g);
2914 return NULL;
2915 }
2916 if (dh_secbits >= 192)
2917 p = BN_get_rfc3526_prime_8192(NULL);
2918 else if (dh_secbits >= 152)
2919 p = BN_get_rfc3526_prime_4096(NULL);
2920 else if (dh_secbits >= 128)
2921 p = BN_get_rfc3526_prime_3072(NULL);
2922 else if (dh_secbits >= 112)
2923 p = BN_get_rfc3526_prime_2048(NULL);
2924 else
2925 p = BN_get_rfc2409_prime_1024(NULL);
2926 if (p == NULL || !DH_set0_pqg(dhp, p, NULL, g)) {
2927 DH_free(dhp);
2928 BN_free(p);
2929 BN_free(g);
2930 return NULL;
0f113f3e 2931 }
7646610b 2932 return dhp;
0f113f3e 2933}
09599b52 2934#endif
b362ccab
DSH		 2935
2936static int ssl_security_cert_key(SSL *s, SSL_CTX *ctx, X509 *x, int op)
0f113f3e 2937{
72245f34 2938 int secbits = -1;
8382fd3a 2939 EVP_PKEY *pkey = X509_get0_pubkey(x);
0f113f3e 2940 if (pkey) {
72245f34
DSH		 2941 /*
2942 * If no parameters this will return -1 and fail using the default
2943 * security callback for any non-zero security level. This will
2944 * reject keys which omit parameters but this only affects DSA and
2945 * omission of parameters is never (?) done in practice.
2946 */
0f113f3e 2947 secbits = EVP_PKEY_security_bits(pkey);
72245f34 2948 }
0f113f3e
MC		 2949 if (s)
2950 return ssl_security(s, op, secbits, 0, x);
2951 else
2952 return ssl_ctx_security(ctx, op, secbits, 0, x);
2953}
b362ccab
DSH		 2954
2955static int ssl_security_cert_sig(SSL *s, SSL_CTX *ctx, X509 *x, int op)
0f113f3e
MC		 2956{
2957 /* Lookup signature algorithm digest */
65e89736 2958 int secbits, nid, pknid;
221c7b55
DSH		 2959 /* Don't check signature if self signed */
2960 if ((X509_get_extension_flags(x) & EXFLAG_SS) != 0)
2961 return 1;
65e89736
DSH		 2962 if (!X509_get_signature_info(x, &nid, &pknid, &secbits, NULL))
2963 secbits = -1;
2964 /* If digest NID not defined use signature NID */
2965 if (nid == NID_undef)
2966 nid = pknid;
0f113f3e 2967 if (s)
65e89736 2968 return ssl_security(s, op, secbits, nid, x);
0f113f3e 2969 else
65e89736 2970 return ssl_ctx_security(ctx, op, secbits, nid, x);
0f113f3e 2971}
b362ccab
DSH		 2972
2973int ssl_security_cert(SSL *s, SSL_CTX *ctx, X509 *x, int vfy, int is_ee)
0f113f3e
MC		 2974{
2975 if (vfy)
2976 vfy = SSL_SECOP_PEER;
2977 if (is_ee) {
2978 if (!ssl_security_cert_key(s, ctx, x, SSL_SECOP_EE_KEY | vfy))
2979 return SSL_R_EE_KEY_TOO_SMALL;
2980 } else {
2981 if (!ssl_security_cert_key(s, ctx, x, SSL_SECOP_CA_KEY | vfy))
2982 return SSL_R_CA_KEY_TOO_SMALL;
2983 }
2984 if (!ssl_security_cert_sig(s, ctx, x, SSL_SECOP_CA_MD | vfy))
2985 return SSL_R_CA_MD_TOO_WEAK;
2986 return 1;
2987}
2988
2989/*
69687aa8
F		 2990 * Check security of a chain, if |sk| includes the end entity certificate then
2991 * |x| is NULL. If |vfy| is 1 then we are verifying a peer chain and not sending
0f113f3e 2992 * one to the peer. Return values: 1 if ok otherwise error code to use
b362ccab
DSH		 2993 */
2994
2995int ssl_security_cert_chain(SSL *s, STACK_OF(X509) *sk, X509 *x, int vfy)
0f113f3e
MC		 2996{
2997 int rv, start_idx, i;
2998 if (x == NULL) {
2999 x = sk_X509_value(sk, 0);
3000 start_idx = 1;
3001 } else
3002 start_idx = 0;
3003
3004 rv = ssl_security_cert(s, NULL, x, vfy, 1);
3005 if (rv != 1)
3006 return rv;
3007
3008 for (i = start_idx; i < sk_X509_num(sk); i++) {
3009 x = sk_X509_value(sk, i);
3010 rv = ssl_security_cert(s, NULL, x, vfy, 0);
3011 if (rv != 1)
3012 return rv;
3013 }
3014 return 1;
3015}
93a77f9e 3016
7f6b466b
DSH		 3017/*
3018 * For TLS 1.2 servers check if we have a certificate which can be used
b46867d7 3019 * with the signature algorithm "lu" and return index of certificate.
7f6b466b
DSH		 3020 */
3021
b46867d7 3022static int tls12_get_cert_sigalg_idx(const SSL *s, const SIGALG_LOOKUP *lu)
7f6b466b 3023{
b46867d7
DSH		 3024 int sig_idx = lu->sig_idx;
3025 const SSL_CERT_LOOKUP *clu = ssl_cert_lookup_by_idx(sig_idx);
7f6b466b
DSH		 3026
3027 /* If not recognised or not supported by cipher mask it is not suitable */
b8fef8ee 3028 if (clu == NULL
555cbb32 3029 || (clu->amask & s->s3.tmp.new_cipher->algorithm_auth) == 0
b8fef8ee 3030 || (clu->nid == EVP_PKEY_RSA_PSS
555cbb32 3031 && (s->s3.tmp.new_cipher->algorithm_mkey & SSL_kRSA) != 0))
b46867d7
DSH		 3032 return -1;
3033
555cbb32 3034 return s->s3.tmp.valid_flags[sig_idx] & CERT_PKEY_VALID ? sig_idx : -1;
7f6b466b
DSH		 3035}
3036
c589c34e 3037/*
5235ef44
MC		 3038 * Checks the given cert against signature_algorithm_cert restrictions sent by
3039 * the peer (if any) as well as whether the hash from the sigalg is usable with
3040 * the key.
3041 * Returns true if the cert is usable and false otherwise.
c589c34e 3042 */
5235ef44
MC		 3043static int check_cert_usable(SSL *s, const SIGALG_LOOKUP *sig, X509 *x,
3044 EVP_PKEY *pkey)
c589c34e
BK		 3045{
3046 const SIGALG_LOOKUP *lu;
ecbb2fca 3047 int mdnid, pknid, supported;
c589c34e
BK		 3048 size_t i;
3049
b5a27688
DW		 3050 /*
3051 * If the given EVP_PKEY cannot supporting signing with this sigalg,
3052 * the answer is simply 'no'.
3053 */
3054 ERR_set_mark();
3055 supported = EVP_PKEY_supports_digest_nid(pkey, sig->hash);
3056 ERR_pop_to_mark();
3057 if (supported == 0)
3058 return 0;
3059
3060 /*
3061 * The TLS 1.3 signature_algorithms_cert extension places restrictions
3062 * on the sigalg with which the certificate was signed (by its issuer).
3063 */
555cbb32 3064 if (s->s3.tmp.peer_cert_sigalgs != NULL) {
b5a27688
DW		 3065 if (!X509_get_signature_info(x, &mdnid, &pknid, NULL, NULL))
3066 return 0;
555cbb32 3067 for (i = 0; i < s->s3.tmp.peer_cert_sigalgslen; i++) {
263ff2c9 3068 lu = tls1_lookup_sigalg(s, s->s3.tmp.peer_cert_sigalgs[i]);
b5a27688 3069 if (lu == NULL)
c589c34e 3070 continue;
ecbb2fca 3071
5235ef44 3072 /*
b5a27688
DW		 3073 * TODO this does not differentiate between the
3074 * rsa_pss_pss_* and rsa_pss_rsae_* schemes since we do not
3075 * have a chain here that lets us look at the key OID in the
3076 * signing certificate.
5235ef44 3077 */
b5a27688
DW		 3078 if (mdnid == lu->hash && pknid == lu->sig)
3079 return 1;
c589c34e
BK		 3080 }
3081 return 0;
3082 }
b5a27688 3083
5235ef44 3084 /*
b5a27688
DW		 3085 * Without signat_algorithms_cert, any certificate for which we have
3086 * a viable public key is permitted.
5235ef44 3087 */
ecbb2fca 3088 return 1;
c589c34e
BK		 3089}
3090
5235ef44
MC		 3091/*
3092 * Returns true if |s| has a usable certificate configured for use
3093 * with signature scheme |sig|.
3094 * "Usable" includes a check for presence as well as applying
3095 * the signature_algorithm_cert restrictions sent by the peer (if any).
3096 * Returns false if no usable certificate is found.
3097 */
3098static int has_usable_cert(SSL *s, const SIGALG_LOOKUP *sig, int idx)
3099{
3100 /* TLS 1.2 callers can override sig->sig_idx, but not TLS 1.3 callers. */
3101 if (idx == -1)
3102 idx = sig->sig_idx;
3103 if (!ssl_has_cert(s, idx))
3104 return 0;
3105
3106 return check_cert_usable(s, sig, s->cert->pkeys[idx].x509,
3107 s->cert->pkeys[idx].privatekey);
3108}
3109
3110/*
3111 * Returns true if the supplied cert |x| and key |pkey| is usable with the
3112 * specified signature scheme |sig|, or false otherwise.
3113 */
3114static int is_cert_usable(SSL *s, const SIGALG_LOOKUP *sig, X509 *x,
3115 EVP_PKEY *pkey)
3116{
3117 size_t idx;
3118
3119 if (ssl_cert_lookup_by_pkey(pkey, &idx) == NULL)
3120 return 0;
3121
3122 /* Check the key is consistent with the sig alg */
3123 if ((int)idx != sig->sig_idx)
3124 return 0;
3125
3126 return check_cert_usable(s, sig, x, pkey);
3127}
3128
3129/*
3130 * Find a signature scheme that works with the supplied certificate |x| and key
3131 * |pkey|. |x| and |pkey| may be NULL in which case we additionally look at our
3132 * available certs/keys to find one that works.
3133 */
3134static const SIGALG_LOOKUP *find_sig_alg(SSL *s, X509 *x, EVP_PKEY *pkey)
3135{
3136 const SIGALG_LOOKUP *lu = NULL;
3137 size_t i;
3138#ifndef OPENSSL_NO_EC
3139 int curve = -1;
3140#endif
3141 EVP_PKEY *tmppkey;
3142
3143 /* Look for a shared sigalgs matching possible certificates */
3144 for (i = 0; i < s->shared_sigalgslen; i++) {
3145 lu = s->shared_sigalgs[i];
3146
3147 /* Skip SHA1, SHA224, DSA and RSA if not PSS */
3148 if (lu->hash == NID_sha1
3149 || lu->hash == NID_sha224
3150 || lu->sig == EVP_PKEY_DSA
3151 || lu->sig == EVP_PKEY_RSA)
3152 continue;
3153 /* Check that we have a cert, and signature_algorithms_cert */
c8f6c28a 3154 if (!tls1_lookup_md(s->ctx, lu, NULL))
5235ef44
MC		 3155 continue;
3156 if ((pkey == NULL && !has_usable_cert(s, lu, -1))
3157 || (pkey != NULL && !is_cert_usable(s, lu, x, pkey)))
3158 continue;
3159
3160 tmppkey = (pkey != NULL) ? pkey
3161 : s->cert->pkeys[lu->sig_idx].privatekey;
3162
3163 if (lu->sig == EVP_PKEY_EC) {
3164#ifndef OPENSSL_NO_EC
c2041da8
RL		 3165 if (curve == -1)
3166 curve = evp_pkey_get_EC_KEY_curve_nid(tmppkey);
5235ef44
MC		 3167 if (lu->curve != NID_undef && curve != lu->curve)
3168 continue;
3169#else
3170 continue;
3171#endif
3172 } else if (lu->sig == EVP_PKEY_RSA_PSS) {
3173 /* validate that key is large enough for the signature algorithm */
c5f87134 3174 if (!rsa_pss_check_min_key_size(s->ctx, tmppkey, lu))
5235ef44
MC		 3175 continue;
3176 }
3177 break;
3178 }
3179
3180 if (i == s->shared_sigalgslen)
3181 return NULL;
3182
3183 return lu;
3184}
3185
93a77f9e
DSH		 3186/*
3187 * Choose an appropriate signature algorithm based on available certificates
717a265a
DSH		 3188 * Sets chosen certificate and signature algorithm.
3189 *
f63a17d6
MC		 3190 * For servers if we fail to find a required certificate it is a fatal error,
3191 * an appropriate error code is set and a TLS alert is sent.
717a265a 3192 *
f63a17d6 3193 * For clients fatalerrs is set to 0. If a certificate is not suitable it is not
717a265a
DSH		 3194 * a fatal error: we will either try another certificate or not present one
3195 * to the server. In this case no error is set.
93a77f9e 3196 */
f63a17d6 3197int tls_choose_sigalg(SSL *s, int fatalerrs)
93a77f9e 3198{
0972bc5c 3199 const SIGALG_LOOKUP *lu = NULL;
b46867d7 3200 int sig_idx = -1;
0972bc5c 3201
555cbb32
TS		 3202 s->s3.tmp.cert = NULL;
3203 s->s3.tmp.sigalg = NULL;
717a265a 3204
93a77f9e 3205 if (SSL_IS_TLS13(s)) {
5235ef44
MC		 3206 lu = find_sig_alg(s, NULL, NULL);
3207 if (lu == NULL) {
f63a17d6 3208 if (!fatalerrs)
717a265a 3209 return 1;
f63a17d6
MC		 3210 SSLfatal(s, SSL_AD_HANDSHAKE_FAILURE, SSL_F_TLS_CHOOSE_SIGALG,
3211 SSL_R_NO_SUITABLE_SIGNATURE_ALGORITHM);
0972bc5c
DSH		 3212 return 0;
3213 }
3214 } else {
7f6b466b 3215 /* If ciphersuite doesn't require a cert nothing to do */
555cbb32 3216 if (!(s->s3.tmp.new_cipher->algorithm_auth & SSL_aCERT))
7f6b466b
DSH		 3217 return 1;
3218 if (!s->server && !ssl_has_cert(s, s->cert->key - s->cert->pkeys))
717a265a 3219 return 1;
0972bc5c
DSH		 3220
3221 if (SSL_USE_SIGALGS(s)) {
c589c34e 3222 size_t i;
555cbb32 3223 if (s->s3.tmp.peer_sigalgs != NULL) {
599b586d 3224#ifndef OPENSSL_NO_EC
c2041da8 3225 int curve = -1;
599b586d
DSH		 3226
3227 /* For Suite B need to match signature algorithm to curve */
c2041da8
RL		 3228 if (tls1_suiteb(s))
3229 curve =
3230 evp_pkey_get_EC_KEY_curve_nid(s->cert->pkeys[SSL_PKEY_ECC]
3231 .privatekey);
599b586d 3232#endif
0972bc5c
DSH		 3233
3234 /*
3235 * Find highest preference signature algorithm matching
3236 * cert type
3237 */
29948ac8
BK		 3238 for (i = 0; i < s->shared_sigalgslen; i++) {
3239 lu = s->shared_sigalgs[i];
7f6b466b
DSH		 3240
3241 if (s->server) {
b46867d7 3242 if ((sig_idx = tls12_get_cert_sigalg_idx(s, lu)) == -1)
7f6b466b 3243 continue;
b46867d7
DSH		 3244 } else {
3245 int cc_idx = s->cert->key - s->cert->pkeys;
3246
3247 sig_idx = lu->sig_idx;
c589c34e
BK		 3248 if (cc_idx != sig_idx)
3249 continue;
b2021556 3250 }
c589c34e
BK		 3251 /* Check that we have a cert, and sig_algs_cert */
3252 if (!has_usable_cert(s, lu, sig_idx))
3253 continue;
0fe3db25
NR		 3254 if (lu->sig == EVP_PKEY_RSA_PSS) {
3255 /* validate that key is large enough for the signature algorithm */
bcec0b94 3256 EVP_PKEY *pkey = s->cert->pkeys[sig_idx].privatekey;
0fe3db25 3257
c5f87134 3258 if (!rsa_pss_check_min_key_size(s->ctx, pkey, lu))
0fe3db25
NR		 3259 continue;
3260 }
7f6b466b
DSH		 3261#ifndef OPENSSL_NO_EC
3262 if (curve == -1 || lu->curve == curve)
599b586d 3263#endif
0972bc5c
DSH		 3264 break;
3265 }
db30f432
DB		 3266#ifndef OPENSSL_NO_GOST
3267 /*
3268 * Some Windows-based implementations do not send GOST algorithms indication
3269 * in supported_algorithms extension, so when we have GOST-based ciphersuite,
3270 * we have to assume GOST support.
3271 */
3272 if (i == s->shared_sigalgslen && s->s3.tmp.new_cipher->algorithm_auth & (SSL_aGOST01 | SSL_aGOST12)) {
3273 if ((lu = tls1_get_legacy_sigalg(s, -1)) == NULL) {
3274 if (!fatalerrs)
3275 return 1;
3276 SSLfatal(s, SSL_AD_HANDSHAKE_FAILURE,
3277 SSL_F_TLS_CHOOSE_SIGALG,
3278 SSL_R_NO_SUITABLE_SIGNATURE_ALGORITHM);
3279 return 0;
3280 } else {
3281 i = 0;
3282 sig_idx = lu->sig_idx;
3283 }
3284 }
3285#endif
29948ac8 3286 if (i == s->shared_sigalgslen) {
f63a17d6 3287 if (!fatalerrs)
717a265a 3288 return 1;
b8fef8ee
MC		 3289 SSLfatal(s, SSL_AD_HANDSHAKE_FAILURE,
3290 SSL_F_TLS_CHOOSE_SIGALG,
3291 SSL_R_NO_SUITABLE_SIGNATURE_ALGORITHM);
0972bc5c
DSH		 3292 return 0;
3293 }
3294 } else {
3295 /*
3296 * If we have no sigalg use defaults
3297 */
3298 const uint16_t *sent_sigs;
c589c34e 3299 size_t sent_sigslen;
0972bc5c 3300
7f6b466b 3301 if ((lu = tls1_get_legacy_sigalg(s, -1)) == NULL) {
f63a17d6 3302 if (!fatalerrs)
717a265a 3303 return 1;
f63a17d6 3304 SSLfatal(s, SSL_AD_INTERNAL_ERROR, SSL_F_TLS_CHOOSE_SIGALG,
a70535f8 3305 SSL_R_NO_SUITABLE_SIGNATURE_ALGORITHM);
0972bc5c
DSH		 3306 return 0;
3307 }
3308
3309 /* Check signature matches a type we sent */
3310 sent_sigslen = tls12_get_psigalgs(s, 1, &sent_sigs);
3311 for (i = 0; i < sent_sigslen; i++, sent_sigs++) {
c589c34e
BK		 3312 if (lu->sigalg == *sent_sigs
3313 && has_usable_cert(s, lu, lu->sig_idx))
0972bc5c
DSH		 3314 break;
3315 }
3316 if (i == sent_sigslen) {
f63a17d6 3317 if (!fatalerrs)
717a265a 3318 return 1;
f63a17d6
MC		 3319 SSLfatal(s, SSL_AD_ILLEGAL_PARAMETER,
3320 SSL_F_TLS_CHOOSE_SIGALG,
3321 SSL_R_WRONG_SIGNATURE_TYPE);
0972bc5c
DSH		 3322 return 0;
3323 }
3324 }
3325 } else {
7f6b466b 3326 if ((lu = tls1_get_legacy_sigalg(s, -1)) == NULL) {
f63a17d6 3327 if (!fatalerrs)
717a265a 3328 return 1;
f63a17d6 3329 SSLfatal(s, SSL_AD_INTERNAL_ERROR, SSL_F_TLS_CHOOSE_SIGALG,
a70535f8 3330 SSL_R_NO_SUITABLE_SIGNATURE_ALGORITHM);
0972bc5c
DSH		 3331 return 0;
3332 }
3333 }
93a77f9e 3334 }
b46867d7
DSH		 3335 if (sig_idx == -1)
3336 sig_idx = lu->sig_idx;
555cbb32
TS		 3337 s->s3.tmp.cert = &s->cert->pkeys[sig_idx];
3338 s->cert->key = s->s3.tmp.cert;
3339 s->s3.tmp.sigalg = lu;
93a77f9e
DSH		 3340 return 1;
3341}
cf72c757
F		 3342
3343int SSL_CTX_set_tlsext_max_fragment_length(SSL_CTX *ctx, uint8_t mode)
3344{
3345 if (mode != TLSEXT_max_fragment_length_DISABLED
3346 && !IS_MAX_FRAGMENT_LENGTH_EXT_VALID(mode)) {
3347 SSLerr(SSL_F_SSL_CTX_SET_TLSEXT_MAX_FRAGMENT_LENGTH,
3348 SSL_R_SSL3_EXT_INVALID_MAX_FRAGMENT_LENGTH);
3349 return 0;
3350 }
3351
3352 ctx->ext.max_fragment_len_mode = mode;
3353 return 1;
3354}
3355
3356int SSL_set_tlsext_max_fragment_length(SSL *ssl, uint8_t mode)
3357{
3358 if (mode != TLSEXT_max_fragment_length_DISABLED
3359 && !IS_MAX_FRAGMENT_LENGTH_EXT_VALID(mode)) {
3360 SSLerr(SSL_F_SSL_SET_TLSEXT_MAX_FRAGMENT_LENGTH,
3361 SSL_R_SSL3_EXT_INVALID_MAX_FRAGMENT_LENGTH);
3362 return 0;
3363 }
3364
3365 ssl->ext.max_fragment_len_mode = mode;
3366 return 1;
3367}
3368
3369uint8_t SSL_SESSION_get_max_fragment_length(const SSL_SESSION *session)
3370{
3371 return session->ext.max_fragment_len_mode;
3372}
a76ce286
P		 3373
3374/*
3375 * Helper functions for HMAC access with legacy support included.
3376 */
3377SSL_HMAC *ssl_hmac_new(const SSL_CTX *ctx)
3378{
3379 SSL_HMAC *ret = OPENSSL_zalloc(sizeof(*ret));
3380 EVP_MAC *mac = NULL;
3381
3382 if (ret == NULL)
3383 return NULL;
3384#ifndef OPENSSL_NO_DEPRECATED_3_0
3385 if (ctx->ext.ticket_key_evp_cb == NULL
3386 && ctx->ext.ticket_key_cb != NULL) {
301fcb28 3387 if (!ssl_hmac_old_new(ret))
a76ce286
P		 3388 goto err;
3389 return ret;
3390 }
3391#endif
7f80980f 3392 mac = EVP_MAC_fetch(ctx->libctx, "HMAC", ctx->propq);
865adf97 3393 if (mac == NULL || (ret->ctx = EVP_MAC_CTX_new(mac)) == NULL)
a76ce286
P		 3394 goto err;
3395 EVP_MAC_free(mac);
3396 return ret;
3397 err:
865adf97 3398 EVP_MAC_CTX_free(ret->ctx);
a76ce286
P		 3399 EVP_MAC_free(mac);
3400 OPENSSL_free(ret);
3401 return NULL;
3402}
3403
3404void ssl_hmac_free(SSL_HMAC *ctx)
3405{
3406 if (ctx != NULL) {
865adf97 3407 EVP_MAC_CTX_free(ctx->ctx);
a76ce286 3408#ifndef OPENSSL_NO_DEPRECATED_3_0
301fcb28 3409 ssl_hmac_old_free(ctx);
a76ce286
P		 3410#endif
3411 OPENSSL_free(ctx);
3412 }
3413}
3414
a76ce286
P		 3415EVP_MAC_CTX *ssl_hmac_get0_EVP_MAC_CTX(SSL_HMAC *ctx)
3416{
3417 return ctx->ctx;
3418}
3419
3420int ssl_hmac_init(SSL_HMAC *ctx, void *key, size_t len, char *md)
3421{
3422 OSSL_PARAM params[3], *p = params;
3423
3424 if (ctx->ctx != NULL) {
3425 *p++ = OSSL_PARAM_construct_utf8_string(OSSL_MAC_PARAM_DIGEST, md, 0);
3426 *p++ = OSSL_PARAM_construct_octet_string(OSSL_KDF_PARAM_KEY, key, len);
3427 *p = OSSL_PARAM_construct_end();
865adf97 3428 if (EVP_MAC_CTX_set_params(ctx->ctx, params) && EVP_MAC_init(ctx->ctx))
a76ce286
P		 3429 return 1;
3430 }
3431#ifndef OPENSSL_NO_DEPRECATED_3_0
3432 if (ctx->old_ctx != NULL)
301fcb28 3433 return ssl_hmac_old_init(ctx, key, len, md);
a76ce286
P		 3434#endif
3435 return 0;
3436}
3437
3438int ssl_hmac_update(SSL_HMAC *ctx, const unsigned char *data, size_t len)
3439{
3440 if (ctx->ctx != NULL)
3441 return EVP_MAC_update(ctx->ctx, data, len);
3442#ifndef OPENSSL_NO_DEPRECATED_3_0
3443 if (ctx->old_ctx != NULL)
301fcb28 3444 return ssl_hmac_old_update(ctx, data, len);
a76ce286
P		 3445#endif
3446 return 0;
3447}
3448
3449int ssl_hmac_final(SSL_HMAC *ctx, unsigned char *md, size_t *len,
3450 size_t max_size)
3451{
3452 if (ctx->ctx != NULL)
3453 return EVP_MAC_final(ctx->ctx, md, len, max_size);
3454#ifndef OPENSSL_NO_DEPRECATED_3_0
301fcb28
MC		 3455 if (ctx->old_ctx != NULL)
3456 return ssl_hmac_old_final(ctx, md, len);
a76ce286
P		 3457#endif
3458 return 0;
3459}
3460
3461size_t ssl_hmac_size(const SSL_HMAC *ctx)
3462{
3463 if (ctx->ctx != NULL)
3464 return EVP_MAC_size(ctx->ctx);
3465#ifndef OPENSSL_NO_DEPRECATED_3_0
3466 if (ctx->old_ctx != NULL)
301fcb28 3467 return ssl_hmac_old_size(ctx);
a76ce286
P		 3468#endif
3469 return 0;
3470}
3471
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