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add_provider_groups: Clean up algorithm pointer on failure
[thirdparty/openssl.git] / ssl / t1_lib.c
CommitLineData
846e33c7 1/*
fecb3aae 2 * Copyright 1995-2022 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>
091f6074 22#include <openssl/param_build.h>
677963e5 23#include "internal/nelem.h"
d8975dec 24#include "internal/sizes.h"
48e971dd 25#include "internal/tlsgroups.h"
706457b7 26#include "ssl_local.h"
3c27208f 27#include <openssl/ct.h>
58964a49 28
5235ef44 29static const SIGALG_LOOKUP *find_sig_alg(SSL *s, X509 *x, EVP_PKEY *pkey);
b0031e5d 30static int tls12_sigalg_allowed(const SSL *s, int op, const SIGALG_LOOKUP *lu);
5235ef44 31
0f113f3e
MC		 32SSL3_ENC_METHOD const TLSv1_enc_data = {
33 tls1_enc,
34 tls1_mac,
35 tls1_setup_key_block,
36 tls1_generate_master_secret,
37 tls1_change_cipher_state,
38 tls1_final_finish_mac,
0f113f3e
MC		 39 TLS_MD_CLIENT_FINISH_CONST, TLS_MD_CLIENT_FINISH_CONST_SIZE,
40 TLS_MD_SERVER_FINISH_CONST, TLS_MD_SERVER_FINISH_CONST_SIZE,
41 tls1_alert_code,
42 tls1_export_keying_material,
43 0,
a29fa98c 44 ssl3_set_handshake_header,
2c7b4dbc 45 tls_close_construct_packet,
0f113f3e
MC		 46 ssl3_handshake_write
47};
48
49SSL3_ENC_METHOD const TLSv1_1_enc_data = {
50 tls1_enc,
51 tls1_mac,
52 tls1_setup_key_block,
53 tls1_generate_master_secret,
54 tls1_change_cipher_state,
55 tls1_final_finish_mac,
0f113f3e
MC		 56 TLS_MD_CLIENT_FINISH_CONST, TLS_MD_CLIENT_FINISH_CONST_SIZE,
57 TLS_MD_SERVER_FINISH_CONST, TLS_MD_SERVER_FINISH_CONST_SIZE,
58 tls1_alert_code,
59 tls1_export_keying_material,
60 SSL_ENC_FLAG_EXPLICIT_IV,
a29fa98c 61 ssl3_set_handshake_header,
2c7b4dbc 62 tls_close_construct_packet,
0f113f3e
MC		 63 ssl3_handshake_write
64};
65
66SSL3_ENC_METHOD const TLSv1_2_enc_data = {
67 tls1_enc,
68 tls1_mac,
69 tls1_setup_key_block,
70 tls1_generate_master_secret,
71 tls1_change_cipher_state,
72 tls1_final_finish_mac,
0f113f3e
MC		 73 TLS_MD_CLIENT_FINISH_CONST, TLS_MD_CLIENT_FINISH_CONST_SIZE,
74 TLS_MD_SERVER_FINISH_CONST, TLS_MD_SERVER_FINISH_CONST_SIZE,
75 tls1_alert_code,
76 tls1_export_keying_material,
77 SSL_ENC_FLAG_EXPLICIT_IV | SSL_ENC_FLAG_SIGALGS | SSL_ENC_FLAG_SHA256_PRF
78 | SSL_ENC_FLAG_TLS1_2_CIPHERS,
a29fa98c 79 ssl3_set_handshake_header,
2c7b4dbc 80 tls_close_construct_packet,
0f113f3e
MC		 81 ssl3_handshake_write
82};
58964a49 83
582a17d6 84SSL3_ENC_METHOD const TLSv1_3_enc_data = {
bebc0c7d 85 tls13_enc,
582a17d6 86 tls1_mac,
92760c21
MC		 87 tls13_setup_key_block,
88 tls13_generate_master_secret,
89 tls13_change_cipher_state,
90 tls13_final_finish_mac,
582a17d6
MC		 91 TLS_MD_CLIENT_FINISH_CONST, TLS_MD_CLIENT_FINISH_CONST_SIZE,
92 TLS_MD_SERVER_FINISH_CONST, TLS_MD_SERVER_FINISH_CONST_SIZE,
04904312 93 tls13_alert_code,
0ca8d1ec 94 tls13_export_keying_material,
bebc0c7d 95 SSL_ENC_FLAG_SIGALGS | SSL_ENC_FLAG_SHA256_PRF,
582a17d6
MC		 96 ssl3_set_handshake_header,
97 tls_close_construct_packet,
98 ssl3_handshake_write
99};
100
f3b656b2 101long tls1_default_timeout(void)
0f113f3e
MC		 102{
103 /*
104 * 2 hours, the 24 hours mentioned in the TLSv1 spec is way too long for
105 * http, the cache would over fill
106 */
107 return (60 * 60 * 2);
108}
58964a49 109
6b691a5c 110int tls1_new(SSL *s)
0f113f3e
MC		 111{
112 if (!ssl3_new(s))
b77f3ed1
MC		 113 return 0;
114 if (!s->method->ssl_clear(s))
115 return 0;
116
117 return 1;
0f113f3e 118}
58964a49 119
6b691a5c 120void tls1_free(SSL *s)
0f113f3e 121{
aff8c126 122 OPENSSL_free(s->ext.session_ticket);
0f113f3e
MC		 123 ssl3_free(s);
124}
58964a49 125
b77f3ed1 126int tls1_clear(SSL *s)
0f113f3e 127{
b77f3ed1
MC		 128 if (!ssl3_clear(s))
129 return 0;
130
4fa52141 131 if (s->method->version == TLS_ANY_VERSION)
5c587fb6 132 s->version = TLS_MAX_VERSION_INTERNAL;
4fa52141
VD		 133 else
134 s->version = s->method->version;
b77f3ed1
MC		 135
136 return 1;
0f113f3e 137}
58964a49 138
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},
0a10825a
BE		 174 {NID_id_tc26_gost_3410_2012_256_paramSetA, OSSL_TLS_GROUP_ID_gc256A},
175 {NID_id_tc26_gost_3410_2012_256_paramSetB, OSSL_TLS_GROUP_ID_gc256B},
176 {NID_id_tc26_gost_3410_2012_256_paramSetC, OSSL_TLS_GROUP_ID_gc256C},
177 {NID_id_tc26_gost_3410_2012_256_paramSetD, OSSL_TLS_GROUP_ID_gc256D},
178 {NID_id_tc26_gost_3410_2012_512_paramSetA, OSSL_TLS_GROUP_ID_gc512A},
179 {NID_id_tc26_gost_3410_2012_512_paramSetB, OSSL_TLS_GROUP_ID_gc512B},
180 {NID_id_tc26_gost_3410_2012_512_paramSetC, OSSL_TLS_GROUP_ID_gc512C},
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
MC		 186};
187
188static const unsigned char ecformats_default[] = {
189 TLSEXT_ECPOINTFORMAT_uncompressed,
190 TLSEXT_ECPOINTFORMAT_ansiX962_compressed_prime,
191 TLSEXT_ECPOINTFORMAT_ansiX962_compressed_char2
192};
193
fe6ef247 194/* The default curves */
9aaecbfc 195static const uint16_t supported_groups_default[] = {
0a10825a
BE		 196 OSSL_TLS_GROUP_ID_x25519, /* X25519 (29) */
197 OSSL_TLS_GROUP_ID_secp256r1, /* secp256r1 (23) */
198 OSSL_TLS_GROUP_ID_x448, /* X448 (30) */
199 OSSL_TLS_GROUP_ID_secp521r1, /* secp521r1 (25) */
200 OSSL_TLS_GROUP_ID_secp384r1, /* secp384r1 (24) */
201 OSSL_TLS_GROUP_ID_gc256A, /* GC256A (34) */
202 OSSL_TLS_GROUP_ID_gc256B, /* GC256B (35) */
203 OSSL_TLS_GROUP_ID_gc256C, /* GC256C (36) */
204 OSSL_TLS_GROUP_ID_gc256D, /* GC256D (37) */
205 OSSL_TLS_GROUP_ID_gc512A, /* GC512A (38) */
206 OSSL_TLS_GROUP_ID_gc512B, /* GC512B (39) */
207 OSSL_TLS_GROUP_ID_gc512C, /* GC512C (40) */
208 OSSL_TLS_GROUP_ID_ffdhe2048, /* ffdhe2048 (0x100) */
209 OSSL_TLS_GROUP_ID_ffdhe3072, /* ffdhe3072 (0x101) */
210 OSSL_TLS_GROUP_ID_ffdhe4096, /* ffdhe4096 (0x102) */
211 OSSL_TLS_GROUP_ID_ffdhe6144, /* ffdhe6144 (0x103) */
212 OSSL_TLS_GROUP_ID_ffdhe8192, /* ffdhe8192 (0x104) */
de57d237
EK		 213};
214
9e84a42d 215static const uint16_t suiteb_curves[] = {
0a10825a
BE		 216 OSSL_TLS_GROUP_ID_secp256r1,
217 OSSL_TLS_GROUP_ID_secp384r1,
0f113f3e 218};
2ea80354 219
9d2d857f
MC		 220struct provider_group_data_st {
221 SSL_CTX *ctx;
222 OSSL_PROVIDER *provider;
223};
224
225#define TLS_GROUP_LIST_MALLOC_BLOCK_SIZE 10
226static OSSL_CALLBACK add_provider_groups;
227static int add_provider_groups(const OSSL_PARAM params[], void *data)
228{
229 struct provider_group_data_st *pgd = data;
230 SSL_CTX *ctx = pgd->ctx;
231 OSSL_PROVIDER *provider = pgd->provider;
232 const OSSL_PARAM *p;
233 TLS_GROUP_INFO *ginf = NULL;
234 EVP_KEYMGMT *keymgmt;
235 unsigned int gid;
c1a74f59 236 unsigned int is_kem = 0;
9d2d857f
MC		 237 int ret = 0;
238
239 if (ctx->group_list_max_len == ctx->group_list_len) {
240 TLS_GROUP_INFO *tmp = NULL;
241
242 if (ctx->group_list_max_len == 0)
243 tmp = OPENSSL_malloc(sizeof(TLS_GROUP_INFO)
244 * TLS_GROUP_LIST_MALLOC_BLOCK_SIZE);
245 else
246 tmp = OPENSSL_realloc(ctx->group_list,
247 (ctx->group_list_max_len
248 + TLS_GROUP_LIST_MALLOC_BLOCK_SIZE)
249 * sizeof(TLS_GROUP_INFO));
250 if (tmp == NULL) {
6849b73c 251 ERR_raise(ERR_LIB_SSL, ERR_R_MALLOC_FAILURE);
9d2d857f
MC		 252 return 0;
253 }
254 ctx->group_list = tmp;
255 memset(tmp + ctx->group_list_max_len,
256 0,
257 sizeof(TLS_GROUP_INFO) * TLS_GROUP_LIST_MALLOC_BLOCK_SIZE);
258 ctx->group_list_max_len += TLS_GROUP_LIST_MALLOC_BLOCK_SIZE;
259 }
260
261 ginf = &ctx->group_list[ctx->group_list_len];
262
263 p = OSSL_PARAM_locate_const(params, OSSL_CAPABILITY_TLS_GROUP_NAME);
264 if (p == NULL || p->data_type != OSSL_PARAM_UTF8_STRING) {
6849b73c 265 ERR_raise(ERR_LIB_SSL, ERR_R_PASSED_INVALID_ARGUMENT);
9d2d857f
MC		 266 goto err;
267 }
268 ginf->tlsname = OPENSSL_strdup(p->data);
269 if (ginf->tlsname == NULL) {
6849b73c 270 ERR_raise(ERR_LIB_SSL, ERR_R_MALLOC_FAILURE);
9d2d857f
MC		 271 goto err;
272 }
273
274 p = OSSL_PARAM_locate_const(params, OSSL_CAPABILITY_TLS_GROUP_NAME_INTERNAL);
275 if (p == NULL || p->data_type != OSSL_PARAM_UTF8_STRING) {
6849b73c 276 ERR_raise(ERR_LIB_SSL, ERR_R_PASSED_INVALID_ARGUMENT);
9d2d857f
MC		 277 goto err;
278 }
279 ginf->realname = OPENSSL_strdup(p->data);
280 if (ginf->realname == NULL) {
6849b73c 281 ERR_raise(ERR_LIB_SSL, ERR_R_MALLOC_FAILURE);
9d2d857f
MC		 282 goto err;
283 }
284
285 p = OSSL_PARAM_locate_const(params, OSSL_CAPABILITY_TLS_GROUP_ID);
286 if (p == NULL || !OSSL_PARAM_get_uint(p, &gid) || gid > UINT16_MAX) {
6849b73c 287 ERR_raise(ERR_LIB_SSL, ERR_R_PASSED_INVALID_ARGUMENT);
9d2d857f
MC		 288 goto err;
289 }
290 ginf->group_id = (uint16_t)gid;
291
292 p = OSSL_PARAM_locate_const(params, OSSL_CAPABILITY_TLS_GROUP_ALG);
293 if (p == NULL || p->data_type != OSSL_PARAM_UTF8_STRING) {
6849b73c 294 ERR_raise(ERR_LIB_SSL, ERR_R_PASSED_INVALID_ARGUMENT);
9d2d857f
MC		 295 goto err;
296 }
297 ginf->algorithm = OPENSSL_strdup(p->data);
298 if (ginf->algorithm == NULL) {
6849b73c 299 ERR_raise(ERR_LIB_SSL, ERR_R_MALLOC_FAILURE);
9d2d857f
MC		 300 goto err;
301 }
302
303 p = OSSL_PARAM_locate_const(params, OSSL_CAPABILITY_TLS_GROUP_SECURITY_BITS);
304 if (p == NULL || !OSSL_PARAM_get_uint(p, &ginf->secbits)) {
6849b73c 305 ERR_raise(ERR_LIB_SSL, ERR_R_PASSED_INVALID_ARGUMENT);
9d2d857f
MC		 306 goto err;
307 }
308
c1a74f59
NT		 309 p = OSSL_PARAM_locate_const(params, OSSL_CAPABILITY_TLS_GROUP_IS_KEM);
310 if (p != NULL && (!OSSL_PARAM_get_uint(p, &is_kem) || is_kem > 1)) {
6849b73c 311 ERR_raise(ERR_LIB_SSL, ERR_R_PASSED_INVALID_ARGUMENT);
c1a74f59
NT		 312 goto err;
313 }
314 ginf->is_kem = 1 & is_kem;
315
9d2d857f
MC		 316 p = OSSL_PARAM_locate_const(params, OSSL_CAPABILITY_TLS_GROUP_MIN_TLS);
317 if (p == NULL || !OSSL_PARAM_get_int(p, &ginf->mintls)) {
6849b73c 318 ERR_raise(ERR_LIB_SSL, ERR_R_PASSED_INVALID_ARGUMENT);
9d2d857f
MC		 319 goto err;
320 }
321
322 p = OSSL_PARAM_locate_const(params, OSSL_CAPABILITY_TLS_GROUP_MAX_TLS);
323 if (p == NULL || !OSSL_PARAM_get_int(p, &ginf->maxtls)) {
6849b73c 324 ERR_raise(ERR_LIB_SSL, ERR_R_PASSED_INVALID_ARGUMENT);
90a74d8c 325 goto err;
9d2d857f
MC		 326 }
327
328 p = OSSL_PARAM_locate_const(params, OSSL_CAPABILITY_TLS_GROUP_MIN_DTLS);
329 if (p == NULL || !OSSL_PARAM_get_int(p, &ginf->mindtls)) {
6849b73c 330 ERR_raise(ERR_LIB_SSL, ERR_R_PASSED_INVALID_ARGUMENT);
9d2d857f
MC		 331 goto err;
332 }
333
334 p = OSSL_PARAM_locate_const(params, OSSL_CAPABILITY_TLS_GROUP_MAX_DTLS);
335 if (p == NULL || !OSSL_PARAM_get_int(p, &ginf->maxdtls)) {
6849b73c 336 ERR_raise(ERR_LIB_SSL, ERR_R_PASSED_INVALID_ARGUMENT);
9d2d857f
MC		 337 goto err;
338 }
339 /*
340 * Now check that the algorithm is actually usable for our property query
341 * string. Regardless of the result we still return success because we have
342 * successfully processed this group, even though we may decide not to use
343 * it.
344 */
345 ret = 1;
346 keymgmt = EVP_KEYMGMT_fetch(ctx->libctx, ginf->algorithm, ctx->propq);
347 if (keymgmt != NULL) {
348 /*
349 * We have successfully fetched the algorithm - however if the provider
350 * doesn't match this one then we ignore it.
351 *
352 * Note: We're cheating a little here. Technically if the same algorithm
353 * is available from more than one provider then it is undefined which
354 * implementation you will get back. Theoretically this could be
355 * different every time...we assume here that you'll always get the
356 * same one back if you repeat the exact same fetch. Is this a reasonable
357 * assumption to make (in which case perhaps we should document this
358 * behaviour)?
359 */
ed576acd 360 if (EVP_KEYMGMT_get0_provider(keymgmt) == provider) {
9d2d857f
MC		 361 /* We have a match - so we will use this group */
362 ctx->group_list_len++;
363 ginf = NULL;
364 }
365 EVP_KEYMGMT_free(keymgmt);
366 }
367 err:
368 if (ginf != NULL) {
369 OPENSSL_free(ginf->tlsname);
370 OPENSSL_free(ginf->realname);
371 OPENSSL_free(ginf->algorithm);
a7863f99 372 ginf->algorithm = ginf->tlsname = ginf->realname = NULL;
9d2d857f
MC		 373 }
374 return ret;
375}
376
377static int discover_provider_groups(OSSL_PROVIDER *provider, void *vctx)
378{
379 struct provider_group_data_st pgd;
380
381 pgd.ctx = vctx;
382 pgd.provider = provider;
383 return OSSL_PROVIDER_get_capabilities(provider, "TLS-GROUP",
384 add_provider_groups, &pgd);
385}
386
387int ssl_load_groups(SSL_CTX *ctx)
388{
ddf8f1ce 389 size_t i, j, num_deflt_grps = 0;
8b1db5d3 390 uint16_t tmp_supp_groups[OSSL_NELEM(supported_groups_default)];
ddf8f1ce
MC		 391
392 if (!OSSL_PROVIDER_do_all(ctx->libctx, discover_provider_groups, ctx))
393 return 0;
394
8b1db5d3 395 for (i = 0; i < OSSL_NELEM(supported_groups_default); i++) {
ddf8f1ce 396 for (j = 0; j < ctx->group_list_len; j++) {
8b1db5d3 397 if (ctx->group_list[j].group_id == supported_groups_default[i]) {
ddf8f1ce 398 tmp_supp_groups[num_deflt_grps++] = ctx->group_list[j].group_id;
8b1db5d3
MC		 399 break;
400 }
ddf8f1ce
MC		 401 }
402 }
403
404 if (num_deflt_grps == 0)
405 return 1;
406
407 ctx->ext.supported_groups_default
408 = OPENSSL_malloc(sizeof(uint16_t) * num_deflt_grps);
409
410 if (ctx->ext.supported_groups_default == NULL) {
411 ERR_raise(ERR_LIB_SSL, ERR_R_MALLOC_FAILURE);
412 return 0;
413 }
414
8b1db5d3
MC		 415 memcpy(ctx->ext.supported_groups_default,
416 tmp_supp_groups,
417 num_deflt_grps * sizeof(tmp_supp_groups[0]));
ddf8f1ce
MC		 418 ctx->ext.supported_groups_default_len = num_deflt_grps;
419
420 return 1;
9d2d857f
MC		 421}
422
260009d8
MC		 423static uint16_t tls1_group_name2id(SSL_CTX *ctx, const char *name)
424{
425 size_t i;
260009d8
MC		 426
427 for (i = 0; i < ctx->group_list_len; i++) {
428 if (strcmp(ctx->group_list[i].tlsname, name) == 0
306b8e7e 429 || strcmp(ctx->group_list[i].realname, name) == 0)
260009d8
MC		 430 return ctx->group_list[i].group_id;
431 }
432
433 return 0;
434}
435
0a10825a
BE		 436uint16_t ssl_group_id_internal_to_tls13(uint16_t curve_id)
437{
438 switch(curve_id) {
439 case OSSL_TLS_GROUP_ID_brainpoolP256r1:
440 return OSSL_TLS_GROUP_ID_brainpoolP256r1_tls13;
441 case OSSL_TLS_GROUP_ID_brainpoolP384r1:
442 return OSSL_TLS_GROUP_ID_brainpoolP384r1_tls13;
443 case OSSL_TLS_GROUP_ID_brainpoolP512r1:
444 return OSSL_TLS_GROUP_ID_brainpoolP512r1_tls13;
445 case OSSL_TLS_GROUP_ID_brainpoolP256r1_tls13:
446 case OSSL_TLS_GROUP_ID_brainpoolP384r1_tls13:
447 case OSSL_TLS_GROUP_ID_brainpoolP512r1_tls13:
448 return 0;
449 default:
450 return curve_id;
451 }
452}
453
454uint16_t ssl_group_id_tls13_to_internal(uint16_t curve_id)
455{
456 switch(curve_id) {
457 case OSSL_TLS_GROUP_ID_brainpoolP256r1:
458 case OSSL_TLS_GROUP_ID_brainpoolP384r1:
459 case OSSL_TLS_GROUP_ID_brainpoolP512r1:
460 return 0;
461 case OSSL_TLS_GROUP_ID_brainpoolP256r1_tls13:
462 return OSSL_TLS_GROUP_ID_brainpoolP256r1;
463 case OSSL_TLS_GROUP_ID_brainpoolP384r1_tls13:
464 return OSSL_TLS_GROUP_ID_brainpoolP384r1;
465 case OSSL_TLS_GROUP_ID_brainpoolP512r1_tls13:
466 return OSSL_TLS_GROUP_ID_brainpoolP512r1;
467 default:
468 return curve_id;
469 }
470}
471
9d2d857f 472const TLS_GROUP_INFO *tls1_group_id_lookup(SSL_CTX *ctx, uint16_t group_id)
0f113f3e 473{
9aaecbfc 474 size_t i;
475
9d2d857f
MC		 476 for (i = 0; i < ctx->group_list_len; i++) {
477 if (ctx->group_list[i].group_id == group_id)
478 return &ctx->group_list[i];
9aaecbfc 479 }
9d2d857f 480
9aaecbfc 481 return NULL;
0f113f3e 482}
525de5d3 483
260009d8 484int tls1_group_id2nid(uint16_t group_id, int include_unknown)
84d4b9e3 485{
9d2d857f 486 size_t i;
84d4b9e3 487
260009d8
MC		 488 if (group_id == 0)
489 return NID_undef;
490
9d2d857f
MC		 491 /*
492 * Return well known Group NIDs - for backwards compatibility. This won't
493 * work for groups we don't know about.
494 */
495 for (i = 0; i < OSSL_NELEM(nid_to_group); i++)
496 {
497 if (nid_to_group[i].group_id == group_id)
498 return nid_to_group[i].nid;
499 }
260009d8
MC		 500 if (!include_unknown)
501 return NID_undef;
502 return TLSEXT_nid_unknown | (int)group_id;
84d4b9e3 503}
504
becbacd7 505uint16_t tls1_nid2group_id(int nid)
0f113f3e 506{
2fa2d15a 507 size_t i;
9aaecbfc 508
9d2d857f
MC		 509 /*
510 * Return well known Group ids - for backwards compatibility. This won't
511 * work for groups we don't know about.
512 */
513 for (i = 0; i < OSSL_NELEM(nid_to_group); i++)
514 {
515 if (nid_to_group[i].nid == nid)
516 return nid_to_group[i].group_id;
0f113f3e 517 }
9d2d857f 518
2fa2d15a 519 return 0;
0f113f3e
MC		 520}
521
740580c2 522/*
ff6d20a6
DSH		 523 * Set *pgroups to the supported groups list and *pgroupslen to
524 * the number of groups supported.
fd2b65ce 525 */
ff6d20a6
DSH		 526void tls1_get_supported_groups(SSL *s, const uint16_t **pgroups,
527 size_t *pgroupslen)
0f113f3e 528{
34e5292c
DSH		 529 /* For Suite B mode only include P-256, P-384 */
530 switch (tls1_suiteb(s)) {
531 case SSL_CERT_FLAG_SUITEB_128_LOS:
ff6d20a6
DSH		 532 *pgroups = suiteb_curves;
533 *pgroupslen = OSSL_NELEM(suiteb_curves);
34e5292c
DSH		 534 break;
535
536 case SSL_CERT_FLAG_SUITEB_128_LOS_ONLY:
ff6d20a6
DSH		 537 *pgroups = suiteb_curves;
538 *pgroupslen = 1;
34e5292c
DSH		 539 break;
540
541 case SSL_CERT_FLAG_SUITEB_192_LOS:
ff6d20a6
DSH		 542 *pgroups = suiteb_curves + 1;
543 *pgroupslen = 1;
34e5292c
DSH		 544 break;
545
546 default:
547 if (s->ext.supportedgroups == NULL) {
ddf8f1ce
MC		 548 *pgroups = s->ctx->ext.supported_groups_default;
549 *pgroupslen = s->ctx->ext.supported_groups_default_len;
34e5292c 550 } else {
ff6d20a6
DSH		 551 *pgroups = s->ext.supportedgroups;
552 *pgroupslen = s->ext.supportedgroups_len;
0f113f3e 553 }
34e5292c 554 break;
0f113f3e 555 }
0f113f3e 556}
b362ccab 557
8b1db5d3
MC		 558int tls_valid_group(SSL *s, uint16_t group_id, int minversion, int maxversion,
559 int isec, int *okfortls13)
9aaecbfc 560{
9d2d857f
MC		 561 const TLS_GROUP_INFO *ginfo = tls1_group_id_lookup(s->ctx, group_id);
562 int ret;
9aaecbfc 563
8b1db5d3 564 if (okfortls13 != NULL)
89e14ca7 565 *okfortls13 = 0;
8b1db5d3 566
9d2d857f
MC		 567 if (ginfo == NULL)
568 return 0;
569
570 if (SSL_IS_DTLS(s)) {
571 if (ginfo->mindtls < 0 || ginfo->maxdtls < 0)
9aaecbfc 572 return 0;
9d2d857f
MC		 573 if (ginfo->maxdtls == 0)
574 ret = 1;
575 else
576 ret = DTLS_VERSION_LE(minversion, ginfo->maxdtls);
577 if (ginfo->mindtls > 0)
578 ret &= DTLS_VERSION_GE(maxversion, ginfo->mindtls);
579 } else {
580 if (ginfo->mintls < 0 || ginfo->maxtls < 0)
581 return 0;
582 if (ginfo->maxtls == 0)
583 ret = 1;
584 else
585 ret = (minversion <= ginfo->maxtls);
586 if (ginfo->mintls > 0)
587 ret &= (maxversion >= ginfo->mintls);
8b1db5d3
MC		 588 if (ret && okfortls13 != NULL && maxversion == TLS1_3_VERSION)
589 *okfortls13 = (ginfo->maxtls == 0)
590 || (ginfo->maxtls >= TLS1_3_VERSION);
9aaecbfc 591 }
8b1db5d3
MC		 592 ret &= !isec
593 || strcmp(ginfo->algorithm, "EC") == 0
594 || strcmp(ginfo->algorithm, "X25519") == 0
595 || strcmp(ginfo->algorithm, "X448") == 0;
9d2d857f
MC		 596
597 return ret;
9aaecbfc 598}
599
dbc6268f
MC		 600/* See if group is allowed by security callback */
601int tls_group_allowed(SSL *s, uint16_t group, int op)
0f113f3e 602{
9d2d857f 603 const TLS_GROUP_INFO *ginfo = tls1_group_id_lookup(s->ctx, group);
dbc6268f 604 unsigned char gtmp[2];
5ce5f787 605
dbc6268f 606 if (ginfo == NULL)
0f113f3e 607 return 0;
9d2d857f 608
dbc6268f
MC		 609 gtmp[0] = group >> 8;
610 gtmp[1] = group & 0xff;
9d2d857f 611 return ssl_security(s, op, ginfo->secbits,
260009d8 612 tls1_group_id2nid(ginfo->group_id, 0), (void *)gtmp);
0f113f3e 613}
b362ccab 614
b50951d3
DSH		 615/* Return 1 if "id" is in "list" */
616static int tls1_in_list(uint16_t id, const uint16_t *list, size_t listlen)
617{
618 size_t i;
619 for (i = 0; i < listlen; i++)
620 if (list[i] == id)
621 return 1;
622 return 0;
623}
624
1d97c843 625/*-
8841154a 626 * For nmatch >= 0, return the id of the |nmatch|th shared group or 0
6977e8ee
KR		 627 * if there is no match.
628 * For nmatch == -1, return number of matches
8841154a 629 * For nmatch == -2, return the id of the group to use for
b50951d3 630 * a tmp key, or 0 if there is no match.
d0595f17 631 */
8841154a 632uint16_t tls1_shared_group(SSL *s, int nmatch)
0f113f3e 633{
9e84a42d 634 const uint16_t *pref, *supp;
b50951d3 635 size_t num_pref, num_supp, i;
0f113f3e 636 int k;
3e373518 637
0f113f3e
MC		 638 /* Can't do anything on client side */
639 if (s->server == 0)
8841154a 640 return 0;
0f113f3e
MC		 641 if (nmatch == -2) {
642 if (tls1_suiteb(s)) {
643 /*
644 * For Suite B ciphersuite determines curve: we already know
645 * these are acceptable due to previous checks.
646 */
555cbb32 647 unsigned long cid = s->s3.tmp.new_cipher->id;
3e373518 648
0f113f3e 649 if (cid == TLS1_CK_ECDHE_ECDSA_WITH_AES_128_GCM_SHA256)
0a10825a 650 return OSSL_TLS_GROUP_ID_secp256r1;
0f113f3e 651 if (cid == TLS1_CK_ECDHE_ECDSA_WITH_AES_256_GCM_SHA384)
0a10825a 652 return OSSL_TLS_GROUP_ID_secp384r1;
0f113f3e 653 /* Should never happen */
8841154a 654 return 0;
0f113f3e
MC		 655 }
656 /* If not Suite B just return first preference shared curve */
657 nmatch = 0;
658 }
659 /*
ff6d20a6
DSH		 660 * If server preference set, our groups are the preference order
661 * otherwise peer decides.
0f113f3e 662 */
ff6d20a6
DSH		 663 if (s->options & SSL_OP_CIPHER_SERVER_PREFERENCE) {
664 tls1_get_supported_groups(s, &pref, &num_pref);
665 tls1_get_peer_groups(s, &supp, &num_supp);
666 } else {
667 tls1_get_peer_groups(s, &pref, &num_pref);
668 tls1_get_supported_groups(s, &supp, &num_supp);
669 }
3c06513f 670
9e84a42d
DSH		 671 for (k = 0, i = 0; i < num_pref; i++) {
672 uint16_t id = pref[i];
0a10825a 673 uint16_t cid = id;
3e373518 674
0a10825a
BE		 675 if (SSL_IS_TLS13(s)) {
676 if (s->options & SSL_OP_CIPHER_SERVER_PREFERENCE)
677 cid = ssl_group_id_internal_to_tls13(id);
678 else
679 cid = id = ssl_group_id_tls13_to_internal(id);
680 }
681 if (!tls1_in_list(cid, supp, num_supp)
682 || !tls_group_allowed(s, id, SSL_SECOP_CURVE_SHARED))
683 continue;
b50951d3
DSH		 684 if (nmatch == k)
685 return id;
686 k++;
0f113f3e
MC		 687 }
688 if (nmatch == -1)
689 return k;
690 /* Out of range (nmatch > k). */
8841154a 691 return 0;
0f113f3e 692}
d0595f17 693
9e84a42d 694int tls1_set_groups(uint16_t **pext, size_t *pextlen,
de4d764e 695 int *groups, size_t ngroups)
0f113f3e 696{
9e84a42d 697 uint16_t *glist;
0f113f3e
MC		 698 size_t i;
699 /*
9aaecbfc 700 * Bitmap of groups included to detect duplicates: two variables are added
701 * to detect duplicates as some values are more than 32.
0f113f3e 702 */
9aaecbfc 703 unsigned long *dup_list = NULL;
704 unsigned long dup_list_egrp = 0;
705 unsigned long dup_list_dhgrp = 0;
cdb10bae 706
680bd131 707 if (ngroups == 0) {
6849b73c 708 ERR_raise(ERR_LIB_SSL, SSL_R_BAD_LENGTH);
680bd131
MC		 709 return 0;
710 }
cdb10bae 711 if ((glist = OPENSSL_malloc(ngroups * sizeof(*glist))) == NULL) {
6849b73c 712 ERR_raise(ERR_LIB_SSL, ERR_R_MALLOC_FAILURE);
0f113f3e 713 return 0;
cdb10bae 714 }
9e84a42d 715 for (i = 0; i < ngroups; i++) {
0f113f3e 716 unsigned long idmask;
9e84a42d 717 uint16_t id;
4a1b4280 718 id = tls1_nid2group_id(groups[i]);
9aaecbfc 719 if ((id & 0x00FF) >= (sizeof(unsigned long) * 8))
720 goto err;
721 idmask = 1L << (id & 0x00FF);
722 dup_list = (id < 0x100) ? &dup_list_egrp : &dup_list_dhgrp;
723 if (!id || ((*dup_list) & idmask))
724 goto err;
725 *dup_list |= idmask;
9e84a42d 726 glist[i] = id;
0f113f3e 727 }
b548a1f1 728 OPENSSL_free(*pext);
de4d764e 729 *pext = glist;
9e84a42d 730 *pextlen = ngroups;
0f113f3e 731 return 1;
9aaecbfc 732err:
733 OPENSSL_free(glist);
734 return 0;
0f113f3e
MC		 735}
736
57e7401f 737# define GROUPLIST_INCREMENT 40
0a8e6c1f 738# define GROUP_NAME_BUFFER_LENGTH 64
0f113f3e 739typedef struct {
260009d8
MC		 740 SSL_CTX *ctx;
741 size_t gidcnt;
57e7401f
MC		 742 size_t gidmax;
743 uint16_t *gid_arr;
260009d8 744} gid_cb_st;
d0595f17 745
260009d8 746static int gid_cb(const char *elem, int len, void *arg)
0f113f3e 747{
260009d8 748 gid_cb_st *garg = arg;
0f113f3e 749 size_t i;
260009d8 750 uint16_t gid = 0;
0a8e6c1f 751 char etmp[GROUP_NAME_BUFFER_LENGTH];
260009d8 752
2747d73c
KR		 753 if (elem == NULL)
754 return 0;
57e7401f
MC		 755 if (garg->gidcnt == garg->gidmax) {
756 uint16_t *tmp =
757 OPENSSL_realloc(garg->gid_arr, garg->gidmax + GROUPLIST_INCREMENT);
758 if (tmp == NULL)
759 return 0;
760 garg->gidmax += GROUPLIST_INCREMENT;
761 garg->gid_arr = tmp;
762 }
0f113f3e
MC		 763 if (len > (int)(sizeof(etmp) - 1))
764 return 0;
765 memcpy(etmp, elem, len);
766 etmp[len] = 0;
260009d8
MC		 767
768 gid = tls1_group_name2id(garg->ctx, etmp);
769 if (gid == 0)
0f113f3e 770 return 0;
260009d8
MC		 771 for (i = 0; i < garg->gidcnt; i++)
772 if (garg->gid_arr[i] == gid)
0f113f3e 773 return 0;
260009d8 774 garg->gid_arr[garg->gidcnt++] = gid;
0f113f3e
MC		 775 return 1;
776}
777
260009d8
MC		 778/* Set groups based on a colon separated list */
779int tls1_set_groups_list(SSL_CTX *ctx, uint16_t **pext, size_t *pextlen,
780 const char *str)
0f113f3e 781{
260009d8
MC		 782 gid_cb_st gcb;
783 uint16_t *tmparr;
57e7401f 784 int ret = 0;
260009d8
MC		 785
786 gcb.gidcnt = 0;
57e7401f
MC		 787 gcb.gidmax = GROUPLIST_INCREMENT;
788 gcb.gid_arr = OPENSSL_malloc(gcb.gidmax * sizeof(*gcb.gid_arr));
789 if (gcb.gid_arr == NULL)
790 return 0;
260009d8
MC		 791 gcb.ctx = ctx;
792 if (!CONF_parse_list(str, ':', 1, gid_cb, &gcb))
57e7401f
MC		 793 goto end;
794 if (pext == NULL) {
795 ret = 1;
796 goto end;
797 }
260009d8
MC		 798
799 /*
800 * gid_cb ensurse there are no duplicates so we can just go ahead and set
801 * the result
802 */
803 tmparr = OPENSSL_memdup(gcb.gid_arr, gcb.gidcnt * sizeof(*tmparr));
804 if (tmparr == NULL)
57e7401f 805 goto end;
260009d8
MC		 806 *pext = tmparr;
807 *pextlen = gcb.gidcnt;
57e7401f
MC		 808 ret = 1;
809 end:
810 OPENSSL_free(gcb.gid_arr);
811 return ret;
0f113f3e 812}
b50951d3 813
4a1b4280 814/* Check a group id matches preferences */
dcf8b01f 815int tls1_check_group_id(SSL *s, uint16_t group_id, int check_own_groups)
4a1b4280
DSH		 816 {
817 const uint16_t *groups;
b50951d3 818 size_t groups_len;
4a1b4280
DSH		 819
820 if (group_id == 0)
821 return 0;
822
6447e818 823 /* Check for Suite B compliance */
555cbb32
TS		 824 if (tls1_suiteb(s) && s->s3.tmp.new_cipher != NULL) {
825 unsigned long cid = s->s3.tmp.new_cipher->id;
6447e818
DSH		 826
827 if (cid == TLS1_CK_ECDHE_ECDSA_WITH_AES_128_GCM_SHA256) {
0a10825a 828 if (group_id != OSSL_TLS_GROUP_ID_secp256r1)
6447e818
DSH		 829 return 0;
830 } else if (cid == TLS1_CK_ECDHE_ECDSA_WITH_AES_256_GCM_SHA384) {
0a10825a 831 if (group_id != OSSL_TLS_GROUP_ID_secp384r1)
6447e818
DSH		 832 return 0;
833 } else {
834 /* Should never happen */
835 return 0;
836 }
837 }
b50951d3 838
dcf8b01f
MC		 839 if (check_own_groups) {
840 /* Check group is one of our preferences */
841 tls1_get_supported_groups(s, &groups, &groups_len);
842 if (!tls1_in_list(group_id, groups, groups_len))
843 return 0;
844 }
4a1b4280 845
dbc6268f 846 if (!tls_group_allowed(s, group_id, SSL_SECOP_CURVE_CHECK))
6447e818
DSH		 847 return 0;
848
4a1b4280
DSH		 849 /* For clients, nothing more to check */
850 if (!s->server)
851 return 1;
852
853 /* Check group is one of peers preferences */
ff6d20a6 854 tls1_get_peer_groups(s, &groups, &groups_len);
4a1b4280
DSH		 855
856 /*
857 * RFC 4492 does not require the supported elliptic curves extension
858 * so if it is not sent we can just choose any curve.
859 * It is invalid to send an empty list in the supported groups
860 * extension, so groups_len == 0 always means no extension.
861 */
862 if (groups_len == 0)
863 return 1;
b50951d3 864 return tls1_in_list(group_id, groups, groups_len);
0f113f3e 865}
d61ff83b 866
7da160b0
MC		 867void tls1_get_formatlist(SSL *s, const unsigned char **pformats,
868 size_t *num_formats)
0f113f3e
MC		 869{
870 /*
871 * If we have a custom point format list use it otherwise use default
872 */
aff8c126
RS		 873 if (s->ext.ecpointformats) {
874 *pformats = s->ext.ecpointformats;
875 *num_formats = s->ext.ecpointformats_len;
0f113f3e
MC		 876 } else {
877 *pformats = ecformats_default;
878 /* For Suite B we don't support char2 fields */
879 if (tls1_suiteb(s))
880 *num_formats = sizeof(ecformats_default) - 1;
881 else
882 *num_formats = sizeof(ecformats_default);
883 }
884}
885
dbc6268f
MC		 886/* Check a key is compatible with compression extension */
887static int tls1_check_pkey_comp(SSL *s, EVP_PKEY *pkey)
888{
dbc6268f
MC		 889 unsigned char comp_id;
890 size_t i;
3d34bedf 891 int point_conv;
dbc6268f
MC		 892
893 /* If not an EC key nothing to check */
c2041da8 894 if (!EVP_PKEY_is_a(pkey, "EC"))
dbc6268f 895 return 1;
5b5eea4b 896
dbc6268f
MC		 897
898 /* Get required compression id */
3d34bedf
MC		 899 point_conv = EVP_PKEY_get_ec_point_conv_form(pkey);
900 if (point_conv == 0)
901 return 0;
902 if (point_conv == POINT_CONVERSION_UNCOMPRESSED) {
903 comp_id = TLSEXT_ECPOINTFORMAT_uncompressed;
dbc6268f 904 } else if (SSL_IS_TLS13(s)) {
5b5eea4b
SL		 905 /*
906 * ec_point_formats extension is not used in TLSv1.3 so we ignore
907 * this check.
908 */
909 return 1;
dbc6268f 910 } else {
3d34bedf 911 int field_type = EVP_PKEY_get_field_type(pkey);
dbc6268f 912
3d34bedf 913 if (field_type == NID_X9_62_prime_field)
dbc6268f 914 comp_id = TLSEXT_ECPOINTFORMAT_ansiX962_compressed_prime;
3d34bedf 915 else if (field_type == NID_X9_62_characteristic_two_field)
dbc6268f
MC		 916 comp_id = TLSEXT_ECPOINTFORMAT_ansiX962_compressed_char2;
917 else
918 return 0;
919 }
920 /*
921 * If point formats extension present check it, otherwise everything is
922 * supported (see RFC4492).
923 */
cd0fb43c 924 if (s->ext.peer_ecpointformats == NULL)
dbc6268f
MC		 925 return 1;
926
cd0fb43c
MC		 927 for (i = 0; i < s->ext.peer_ecpointformats_len; i++) {
928 if (s->ext.peer_ecpointformats[i] == comp_id)
dbc6268f
MC		 929 return 1;
930 }
931 return 0;
932}
933
934/* Return group id of a key */
935static uint16_t tls1_get_group_id(EVP_PKEY *pkey)
936{
d8975dec 937 int curve_nid = ssl_get_EC_curve_nid(pkey);
dbc6268f 938
c2041da8 939 if (curve_nid == NID_undef)
dbc6268f 940 return 0;
c2041da8 941 return tls1_nid2group_id(curve_nid);
dbc6268f
MC		 942}
943
0f113f3e
MC		 944/*
945 * Check cert parameters compatible with extensions: currently just checks EC
946 * certificates have compatible curves and compression.
d61ff83b 947 */
9195ddcd 948static int tls1_check_cert_param(SSL *s, X509 *x, int check_ee_md)
0f113f3e 949{
4a1b4280 950 uint16_t group_id;
0f113f3e 951 EVP_PKEY *pkey;
8382fd3a 952 pkey = X509_get0_pubkey(x);
4a1b4280 953 if (pkey == NULL)
0f113f3e
MC		 954 return 0;
955 /* If not EC nothing to do */
c2041da8 956 if (!EVP_PKEY_is_a(pkey, "EC"))
0f113f3e 957 return 1;
4a1b4280
DSH		 958 /* Check compression */
959 if (!tls1_check_pkey_comp(s, pkey))
0f113f3e 960 return 0;
4a1b4280 961 group_id = tls1_get_group_id(pkey);
dcf8b01f
MC		 962 /*
963 * For a server we allow the certificate to not be in our list of supported
964 * groups.
965 */
966 if (!tls1_check_group_id(s, group_id, !s->server))
0f113f3e
MC		 967 return 0;
968 /*
969 * Special case for suite B. We *MUST* sign using SHA256+P-256 or
9195ddcd 970 * SHA384+P-384.
0f113f3e 971 */
9195ddcd 972 if (check_ee_md && tls1_suiteb(s)) {
0f113f3e
MC		 973 int check_md;
974 size_t i;
9e84a42d 975
0f113f3e 976 /* Check to see we have necessary signing algorithm */
0a10825a 977 if (group_id == OSSL_TLS_GROUP_ID_secp256r1)
0f113f3e 978 check_md = NID_ecdsa_with_SHA256;
0a10825a 979 else if (group_id == OSSL_TLS_GROUP_ID_secp384r1)
0f113f3e
MC		 980 check_md = NID_ecdsa_with_SHA384;
981 else
982 return 0; /* Should never happen */
29948ac8
BK		 983 for (i = 0; i < s->shared_sigalgslen; i++) {
984 if (check_md == s->shared_sigalgs[i]->sigandhash)
1e331727 985 return 1;
4a1b4280
DSH		 986 }
987 return 0;
0f113f3e 988 }
4a1b4280 989 return 1;
0f113f3e
MC		 990}
991
6977e8ee 992/*
8483a003 993 * tls1_check_ec_tmp_key - Check EC temporary key compatibility
6977e8ee
KR		 994 * @s: SSL connection
995 * @cid: Cipher ID we're considering using
996 *
997 * Checks that the kECDHE cipher suite we're considering using
998 * is compatible with the client extensions.
999 *
1000 * Returns 0 when the cipher can't be used or 1 when it can.
1001 */
2ea80354 1002int tls1_check_ec_tmp_key(SSL *s, unsigned long cid)
0f113f3e 1003{
4a1b4280
DSH		 1004 /* If not Suite B just need a shared group */
1005 if (!tls1_suiteb(s))
1006 return tls1_shared_group(s, 0) != 0;
0f113f3e
MC		 1007 /*
1008 * If Suite B, AES128 MUST use P-256 and AES256 MUST use P-384, no other
1009 * curves permitted.
1010 */
4a1b4280 1011 if (cid == TLS1_CK_ECDHE_ECDSA_WITH_AES_128_GCM_SHA256)
0a10825a 1012 return tls1_check_group_id(s, OSSL_TLS_GROUP_ID_secp256r1, 1);
4a1b4280 1013 if (cid == TLS1_CK_ECDHE_ECDSA_WITH_AES_256_GCM_SHA384)
0a10825a 1014 return tls1_check_group_id(s, OSSL_TLS_GROUP_ID_secp384r1, 1);
4a1b4280
DSH		 1015
1016 return 0;
0f113f3e 1017}
d0595f17 1018
703bcee0 1019/* Default sigalg schemes */
98c792d1 1020static const uint16_t tls12_sigalgs[] = {
703bcee0
MC		 1021 TLSEXT_SIGALG_ecdsa_secp256r1_sha256,
1022 TLSEXT_SIGALG_ecdsa_secp384r1_sha384,
1023 TLSEXT_SIGALG_ecdsa_secp521r1_sha512,
3d234c9e 1024 TLSEXT_SIGALG_ed25519,
0e1d6ecf 1025 TLSEXT_SIGALG_ed448,
0a10825a
BE		 1026 TLSEXT_SIGALG_ecdsa_brainpoolP256r1_sha256,
1027 TLSEXT_SIGALG_ecdsa_brainpoolP384r1_sha384,
1028 TLSEXT_SIGALG_ecdsa_brainpoolP512r1_sha512,
0f113f3e 1029
f55e99f7
BK		 1030 TLSEXT_SIGALG_rsa_pss_pss_sha256,
1031 TLSEXT_SIGALG_rsa_pss_pss_sha384,
1032 TLSEXT_SIGALG_rsa_pss_pss_sha512,
1033 TLSEXT_SIGALG_rsa_pss_rsae_sha256,
1034 TLSEXT_SIGALG_rsa_pss_rsae_sha384,
1035 TLSEXT_SIGALG_rsa_pss_rsae_sha512,
536199ec 1036
703bcee0
MC		 1037 TLSEXT_SIGALG_rsa_pkcs1_sha256,
1038 TLSEXT_SIGALG_rsa_pkcs1_sha384,
1039 TLSEXT_SIGALG_rsa_pkcs1_sha512,
0f113f3e 1040
d8311fc9 1041 TLSEXT_SIGALG_ecdsa_sha224,
42ab2230 1042 TLSEXT_SIGALG_ecdsa_sha1,
462f4f4b 1043
d8311fc9 1044 TLSEXT_SIGALG_rsa_pkcs1_sha224,
42ab2230 1045 TLSEXT_SIGALG_rsa_pkcs1_sha1,
e376242d 1046
d8311fc9 1047 TLSEXT_SIGALG_dsa_sha224,
42ab2230
MC		 1048 TLSEXT_SIGALG_dsa_sha1,
1049
703bcee0
MC		 1050 TLSEXT_SIGALG_dsa_sha256,
1051 TLSEXT_SIGALG_dsa_sha384,
41f10305 1052 TLSEXT_SIGALG_dsa_sha512,
e376242d 1053
41f10305 1054#ifndef OPENSSL_NO_GOST
6f892296
NM		 1055 TLSEXT_SIGALG_gostr34102012_256_intrinsic,
1056 TLSEXT_SIGALG_gostr34102012_512_intrinsic,
41f10305
DB		 1057 TLSEXT_SIGALG_gostr34102012_256_gostr34112012_256,
1058 TLSEXT_SIGALG_gostr34102012_512_gostr34112012_512,
1059 TLSEXT_SIGALG_gostr34102001_gostr3411,
5eeb6c6e 1060#endif
fc101f88 1061};
0f113f3e 1062
462f4f4b 1063
98c792d1 1064static const uint16_t suiteb_sigalgs[] = {
703bcee0
MC		 1065 TLSEXT_SIGALG_ecdsa_secp256r1_sha256,
1066 TLSEXT_SIGALG_ecdsa_secp384r1_sha384
2ea80354 1067};
aff8c126 1068
7a531ee4 1069static const SIGALG_LOOKUP sigalg_lookup_tbl[] = {
edbfba1a 1070 {"ecdsa_secp256r1_sha256", TLSEXT_SIGALG_ecdsa_secp256r1_sha256,
17ae384e 1071 NID_sha256, SSL_MD_SHA256_IDX, EVP_PKEY_EC, SSL_PKEY_ECC,
263ff2c9 1072 NID_ecdsa_with_SHA256, NID_X9_62_prime256v1, 1},
edbfba1a 1073 {"ecdsa_secp384r1_sha384", TLSEXT_SIGALG_ecdsa_secp384r1_sha384,
17ae384e 1074 NID_sha384, SSL_MD_SHA384_IDX, EVP_PKEY_EC, SSL_PKEY_ECC,
263ff2c9 1075 NID_ecdsa_with_SHA384, NID_secp384r1, 1},
edbfba1a 1076 {"ecdsa_secp521r1_sha512", TLSEXT_SIGALG_ecdsa_secp521r1_sha512,
17ae384e 1077 NID_sha512, SSL_MD_SHA512_IDX, EVP_PKEY_EC, SSL_PKEY_ECC,
263ff2c9 1078 NID_ecdsa_with_SHA512, NID_secp521r1, 1},
b04d4e38 1079 {"ed25519", TLSEXT_SIGALG_ed25519,
d2916a5b 1080 NID_undef, -1, EVP_PKEY_ED25519, SSL_PKEY_ED25519,
263ff2c9 1081 NID_undef, NID_undef, 1},
0e1d6ecf
MC		 1082 {"ed448", TLSEXT_SIGALG_ed448,
1083 NID_undef, -1, EVP_PKEY_ED448, SSL_PKEY_ED448,
263ff2c9 1084 NID_undef, NID_undef, 1},
d8311fc9
MC		 1085 {NULL, TLSEXT_SIGALG_ecdsa_sha224,
1086 NID_sha224, SSL_MD_SHA224_IDX, EVP_PKEY_EC, SSL_PKEY_ECC,
263ff2c9 1087 NID_ecdsa_with_SHA224, NID_undef, 1},
edbfba1a 1088 {NULL, TLSEXT_SIGALG_ecdsa_sha1,
17ae384e 1089 NID_sha1, SSL_MD_SHA1_IDX, EVP_PKEY_EC, SSL_PKEY_ECC,
263ff2c9 1090 NID_ecdsa_with_SHA1, NID_undef, 1},
0a10825a
BE		 1091 {"ecdsa_brainpoolP256r1_sha256", TLSEXT_SIGALG_ecdsa_brainpoolP256r1_sha256,
1092 NID_sha256, SSL_MD_SHA256_IDX, EVP_PKEY_EC, SSL_PKEY_ECC,
1093 NID_ecdsa_with_SHA256, NID_brainpoolP256r1, 1},
1094 {"ecdsa_brainpoolP384r1_sha384", TLSEXT_SIGALG_ecdsa_brainpoolP384r1_sha384,
1095 NID_sha384, SSL_MD_SHA384_IDX, EVP_PKEY_EC, SSL_PKEY_ECC,
1096 NID_ecdsa_with_SHA384, NID_brainpoolP384r1, 1},
1097 {"ecdsa_brainpoolP512r1_sha512", TLSEXT_SIGALG_ecdsa_brainpoolP512r1_sha512,
1098 NID_sha512, SSL_MD_SHA512_IDX, EVP_PKEY_EC, SSL_PKEY_ECC,
1099 NID_ecdsa_with_SHA512, NID_brainpoolP512r1, 1},
f55e99f7
BK		 1100 {"rsa_pss_rsae_sha256", TLSEXT_SIGALG_rsa_pss_rsae_sha256,
1101 NID_sha256, SSL_MD_SHA256_IDX, EVP_PKEY_RSA_PSS, SSL_PKEY_RSA,
263ff2c9 1102 NID_undef, NID_undef, 1},
f55e99f7
BK		 1103 {"rsa_pss_rsae_sha384", TLSEXT_SIGALG_rsa_pss_rsae_sha384,
1104 NID_sha384, SSL_MD_SHA384_IDX, EVP_PKEY_RSA_PSS, SSL_PKEY_RSA,
263ff2c9 1105 NID_undef, NID_undef, 1},
f55e99f7
BK		 1106 {"rsa_pss_rsae_sha512", TLSEXT_SIGALG_rsa_pss_rsae_sha512,
1107 NID_sha512, SSL_MD_SHA512_IDX, EVP_PKEY_RSA_PSS, SSL_PKEY_RSA,
263ff2c9 1108 NID_undef, NID_undef, 1},
f55e99f7 1109 {"rsa_pss_pss_sha256", TLSEXT_SIGALG_rsa_pss_pss_sha256,
17ae384e 1110 NID_sha256, SSL_MD_SHA256_IDX, EVP_PKEY_RSA_PSS, SSL_PKEY_RSA_PSS_SIGN,
263ff2c9 1111 NID_undef, NID_undef, 1},
f55e99f7 1112 {"rsa_pss_pss_sha384", TLSEXT_SIGALG_rsa_pss_pss_sha384,
17ae384e 1113 NID_sha384, SSL_MD_SHA384_IDX, EVP_PKEY_RSA_PSS, SSL_PKEY_RSA_PSS_SIGN,
263ff2c9 1114 NID_undef, NID_undef, 1},
f55e99f7 1115 {"rsa_pss_pss_sha512", TLSEXT_SIGALG_rsa_pss_pss_sha512,
17ae384e 1116 NID_sha512, SSL_MD_SHA512_IDX, EVP_PKEY_RSA_PSS, SSL_PKEY_RSA_PSS_SIGN,
263ff2c9 1117 NID_undef, NID_undef, 1},
edbfba1a 1118 {"rsa_pkcs1_sha256", TLSEXT_SIGALG_rsa_pkcs1_sha256,
d0ff28f8 1119 NID_sha256, SSL_MD_SHA256_IDX, EVP_PKEY_RSA, SSL_PKEY_RSA,
263ff2c9 1120 NID_sha256WithRSAEncryption, NID_undef, 1},
edbfba1a 1121 {"rsa_pkcs1_sha384", TLSEXT_SIGALG_rsa_pkcs1_sha384,
d0ff28f8 1122 NID_sha384, SSL_MD_SHA384_IDX, EVP_PKEY_RSA, SSL_PKEY_RSA,
263ff2c9 1123 NID_sha384WithRSAEncryption, NID_undef, 1},
edbfba1a 1124 {"rsa_pkcs1_sha512", TLSEXT_SIGALG_rsa_pkcs1_sha512,
d0ff28f8 1125 NID_sha512, SSL_MD_SHA512_IDX, EVP_PKEY_RSA, SSL_PKEY_RSA,
263ff2c9 1126 NID_sha512WithRSAEncryption, NID_undef, 1},
d8311fc9
MC		 1127 {"rsa_pkcs1_sha224", TLSEXT_SIGALG_rsa_pkcs1_sha224,
1128 NID_sha224, SSL_MD_SHA224_IDX, EVP_PKEY_RSA, SSL_PKEY_RSA,
263ff2c9 1129 NID_sha224WithRSAEncryption, NID_undef, 1},
edbfba1a 1130 {"rsa_pkcs1_sha1", TLSEXT_SIGALG_rsa_pkcs1_sha1,
d0ff28f8 1131 NID_sha1, SSL_MD_SHA1_IDX, EVP_PKEY_RSA, SSL_PKEY_RSA,
263ff2c9 1132 NID_sha1WithRSAEncryption, NID_undef, 1},
edbfba1a 1133 {NULL, TLSEXT_SIGALG_dsa_sha256,
17ae384e 1134 NID_sha256, SSL_MD_SHA256_IDX, EVP_PKEY_DSA, SSL_PKEY_DSA_SIGN,
263ff2c9 1135 NID_dsa_with_SHA256, NID_undef, 1},
edbfba1a 1136 {NULL, TLSEXT_SIGALG_dsa_sha384,
17ae384e 1137 NID_sha384, SSL_MD_SHA384_IDX, EVP_PKEY_DSA, SSL_PKEY_DSA_SIGN,
263ff2c9 1138 NID_undef, NID_undef, 1},
edbfba1a 1139 {NULL, TLSEXT_SIGALG_dsa_sha512,
17ae384e 1140 NID_sha512, SSL_MD_SHA512_IDX, EVP_PKEY_DSA, SSL_PKEY_DSA_SIGN,
263ff2c9 1141 NID_undef, NID_undef, 1},
d8311fc9
MC		 1142 {NULL, TLSEXT_SIGALG_dsa_sha224,
1143 NID_sha224, SSL_MD_SHA224_IDX, EVP_PKEY_DSA, SSL_PKEY_DSA_SIGN,
263ff2c9 1144 NID_undef, NID_undef, 1},
edbfba1a 1145 {NULL, TLSEXT_SIGALG_dsa_sha1,
17ae384e 1146 NID_sha1, SSL_MD_SHA1_IDX, EVP_PKEY_DSA, SSL_PKEY_DSA_SIGN,
263ff2c9 1147 NID_dsaWithSHA1, NID_undef, 1},
5eeb6c6e 1148#ifndef OPENSSL_NO_GOST
6f892296
NM		 1149 {NULL, TLSEXT_SIGALG_gostr34102012_256_intrinsic,
1150 NID_id_GostR3411_2012_256, SSL_MD_GOST12_256_IDX,
1151 NID_id_GostR3410_2012_256, SSL_PKEY_GOST12_256,
263ff2c9 1152 NID_undef, NID_undef, 1},
6f892296
NM		 1153 {NULL, TLSEXT_SIGALG_gostr34102012_512_intrinsic,
1154 NID_id_GostR3411_2012_512, SSL_MD_GOST12_512_IDX,
1155 NID_id_GostR3410_2012_512, SSL_PKEY_GOST12_512,
263ff2c9 1156 NID_undef, NID_undef, 1},
edbfba1a 1157 {NULL, TLSEXT_SIGALG_gostr34102012_256_gostr34112012_256,
17ae384e
DSH		 1158 NID_id_GostR3411_2012_256, SSL_MD_GOST12_256_IDX,
1159 NID_id_GostR3410_2012_256, SSL_PKEY_GOST12_256,
263ff2c9 1160 NID_undef, NID_undef, 1},
edbfba1a 1161 {NULL, TLSEXT_SIGALG_gostr34102012_512_gostr34112012_512,
17ae384e
DSH		 1162 NID_id_GostR3411_2012_512, SSL_MD_GOST12_512_IDX,
1163 NID_id_GostR3410_2012_512, SSL_PKEY_GOST12_512,
263ff2c9 1164 NID_undef, NID_undef, 1},
edbfba1a 1165 {NULL, TLSEXT_SIGALG_gostr34102001_gostr3411,
17ae384e
DSH		 1166 NID_id_GostR3411_94, SSL_MD_GOST94_IDX,
1167 NID_id_GostR3410_2001, SSL_PKEY_GOST01,
263ff2c9 1168 NID_undef, NID_undef, 1}
5eeb6c6e 1169#endif
703bcee0 1170};
0972bc5c
DSH		 1171/* Legacy sigalgs for TLS < 1.2 RSA TLS signatures */
1172static const SIGALG_LOOKUP legacy_rsa_sigalg = {
1173 "rsa_pkcs1_md5_sha1", 0,
1174 NID_md5_sha1, SSL_MD_MD5_SHA1_IDX,
1175 EVP_PKEY_RSA, SSL_PKEY_RSA,
263ff2c9 1176 NID_undef, NID_undef, 1
0972bc5c
DSH		 1177};
1178
1179/*
1180 * Default signature algorithm values used if signature algorithms not present.
1181 * From RFC5246. Note: order must match certificate index order.
1182 */
1183static const uint16_t tls_default_sigalg[] = {
1184 TLSEXT_SIGALG_rsa_pkcs1_sha1, /* SSL_PKEY_RSA */
045d078a 1185 0, /* SSL_PKEY_RSA_PSS_SIGN */
0972bc5c
DSH		 1186 TLSEXT_SIGALG_dsa_sha1, /* SSL_PKEY_DSA_SIGN */
1187 TLSEXT_SIGALG_ecdsa_sha1, /* SSL_PKEY_ECC */
1188 TLSEXT_SIGALG_gostr34102001_gostr3411, /* SSL_PKEY_GOST01 */
6f892296
NM		 1189 TLSEXT_SIGALG_gostr34102012_256_intrinsic, /* SSL_PKEY_GOST12_256 */
1190 TLSEXT_SIGALG_gostr34102012_512_intrinsic, /* SSL_PKEY_GOST12_512 */
0e1d6ecf
MC		 1191 0, /* SSL_PKEY_ED25519 */
1192 0, /* SSL_PKEY_ED448 */
0972bc5c 1193};
703bcee0 1194
263ff2c9
MC		 1195int ssl_setup_sig_algs(SSL_CTX *ctx)
1196{
1197 size_t i;
1198 const SIGALG_LOOKUP *lu;
1199 SIGALG_LOOKUP *cache
1200 = OPENSSL_malloc(sizeof(*lu) * OSSL_NELEM(sigalg_lookup_tbl));
1201 EVP_PKEY *tmpkey = EVP_PKEY_new();
1202 int ret = 0;
1203
1204 if (cache == NULL || tmpkey == NULL)
1205 goto err;
1206
1207 ERR_set_mark();
1208 for (i = 0, lu = sigalg_lookup_tbl;
1209 i < OSSL_NELEM(sigalg_lookup_tbl); lu++, i++) {
1210 EVP_PKEY_CTX *pctx;
1211
1212 cache[i] = *lu;
1213
1214 /*
1215 * Check hash is available.
57e7401f 1216 * This test is not perfect. A provider could have support
263ff2c9
MC		 1217 * for a signature scheme, but not a particular hash. However the hash
1218 * could be available from some other loaded provider. In that case it
1219 * could be that the signature is available, and the hash is available
1220 * independently - but not as a combination. We ignore this for now.
1221 */
1222 if (lu->hash != NID_undef
1223 && ctx->ssl_digest_methods[lu->hash_idx] == NULL) {
1224 cache[i].enabled = 0;
1225 continue;
1226 }
1227
1228 if (!EVP_PKEY_set_type(tmpkey, lu->sig)) {
1229 cache[i].enabled = 0;
1230 continue;
1231 }
1232 pctx = EVP_PKEY_CTX_new_from_pkey(ctx->libctx, tmpkey, ctx->propq);
1233 /* If unable to create pctx we assume the sig algorithm is unavailable */
1234 if (pctx == NULL)
1235 cache[i].enabled = 0;
1236 EVP_PKEY_CTX_free(pctx);
1237 }
1238 ERR_pop_to_mark();
1239 ctx->sigalg_lookup_cache = cache;
1240 cache = NULL;
1241
1242 ret = 1;
1243 err:
1244 OPENSSL_free(cache);
1245 EVP_PKEY_free(tmpkey);
1246 return ret;
1247}
1248
4d43ee28 1249/* Lookup TLS signature algorithm */
263ff2c9 1250static const SIGALG_LOOKUP *tls1_lookup_sigalg(const SSL *s, uint16_t sigalg)
703bcee0
MC		 1251{
1252 size_t i;
263ff2c9 1253 const SIGALG_LOOKUP *lu;
703bcee0 1254
263ff2c9
MC		 1255 for (i = 0, lu = s->ctx->sigalg_lookup_cache;
1256 /* cache should have the same number of elements as sigalg_lookup_tbl */
1257 i < OSSL_NELEM(sigalg_lookup_tbl);
1258 lu++, i++) {
54e3efff
MC		 1259 if (lu->sigalg == sigalg) {
1260 if (!lu->enabled)
1261 return NULL;
263ff2c9 1262 return lu;
54e3efff 1263 }
703bcee0 1264 }
4d43ee28
DSH		 1265 return NULL;
1266}
168067b6 1267/* Lookup hash: return 0 if invalid or not enabled */
c8f6c28a 1268int tls1_lookup_md(SSL_CTX *ctx, const SIGALG_LOOKUP *lu, const EVP_MD **pmd)
168067b6
DSH		 1269{
1270 const EVP_MD *md;
1271 if (lu == NULL)
1272 return 0;
1273 /* lu->hash == NID_undef means no associated digest */
1274 if (lu->hash == NID_undef) {
1275 md = NULL;
1276 } else {
c8f6c28a 1277 md = ssl_md(ctx, lu->hash_idx);
168067b6
DSH		 1278 if (md == NULL)
1279 return 0;
1280 }
1281 if (pmd)
1282 *pmd = md;
1283 return 1;
1284}
1285
0fe3db25
NR		 1286/*
1287 * Check if key is large enough to generate RSA-PSS signature.
1288 *
1289 * The key must greater than or equal to 2 * hash length + 2.
1290 * SHA512 has a hash length of 64 bytes, which is incompatible
1291 * with a 128 byte (1024 bit) key.
1292 */
ed576acd 1293#define RSA_PSS_MINIMUM_KEY_SIZE(md) (2 * EVP_MD_get_size(md) + 2)
c5f87134 1294static int rsa_pss_check_min_key_size(SSL_CTX *ctx, const EVP_PKEY *pkey,
c8f6c28a 1295 const SIGALG_LOOKUP *lu)
0fe3db25
NR		 1296{
1297 const EVP_MD *md;
1298
c5f87134 1299 if (pkey == NULL)
0fe3db25 1300 return 0;
c8f6c28a 1301 if (!tls1_lookup_md(ctx, lu, &md) || md == NULL)
0fe3db25 1302 return 0;
ed576acd 1303 if (EVP_PKEY_get_size(pkey) < RSA_PSS_MINIMUM_KEY_SIZE(md))
0fe3db25
NR		 1304 return 0;
1305 return 1;
1306}
1307
0972bc5c 1308/*
b0031e5d
KR		 1309 * Returns a signature algorithm when the peer did not send a list of supported
1310 * signature algorithms. The signature algorithm is fixed for the certificate
1311 * type. |idx| is a certificate type index (SSL_PKEY_*). When |idx| is -1 the
1312 * certificate type from |s| will be used.
1313 * Returns the signature algorithm to use, or NULL on error.
0972bc5c
DSH		 1314 */
1315static const SIGALG_LOOKUP *tls1_get_legacy_sigalg(const SSL *s, int idx)
1316{
7f6b466b
DSH		 1317 if (idx == -1) {
1318 if (s->server) {
1319 size_t i;
1320
1321 /* Work out index corresponding to ciphersuite */
1322 for (i = 0; i < SSL_PKEY_NUM; i++) {
1323 const SSL_CERT_LOOKUP *clu = ssl_cert_lookup_by_idx(i);
1324
ed5b26ce
P		 1325 if (clu == NULL)
1326 continue;
555cbb32 1327 if (clu->amask & s->s3.tmp.new_cipher->algorithm_auth) {
7f6b466b
DSH		 1328 idx = i;
1329 break;
1330 }
1331 }
1f65c045
DB		 1332
1333 /*
1334 * Some GOST ciphersuites allow more than one signature algorithms
1335 * */
555cbb32 1336 if (idx == SSL_PKEY_GOST01 && s->s3.tmp.new_cipher->algorithm_auth != SSL_aGOST01) {
1f65c045
DB		 1337 int real_idx;
1338
1339 for (real_idx = SSL_PKEY_GOST12_512; real_idx >= SSL_PKEY_GOST01;
1340 real_idx--) {
1341 if (s->cert->pkeys[real_idx].privatekey != NULL) {
1342 idx = real_idx;
1343 break;
1344 }
1345 }
1346 }
5a5530a2
DB		 1347 /*
1348 * As both SSL_PKEY_GOST12_512 and SSL_PKEY_GOST12_256 indices can be used
1349 * with new (aGOST12-only) ciphersuites, we should find out which one is available really.
1350 */
1351 else if (idx == SSL_PKEY_GOST12_256) {
1352 int real_idx;
1353
1354 for (real_idx = SSL_PKEY_GOST12_512; real_idx >= SSL_PKEY_GOST12_256;
1355 real_idx--) {
1356 if (s->cert->pkeys[real_idx].privatekey != NULL) {
1357 idx = real_idx;
1358 break;
1359 }
1360 }
1361 }
7f6b466b
DSH		 1362 } else {
1363 idx = s->cert->key - s->cert->pkeys;
1364 }
1365 }
0972bc5c
DSH		 1366 if (idx < 0 || idx >= (int)OSSL_NELEM(tls_default_sigalg))
1367 return NULL;
1368 if (SSL_USE_SIGALGS(s) || idx != SSL_PKEY_RSA) {
263ff2c9 1369 const SIGALG_LOOKUP *lu = tls1_lookup_sigalg(s, tls_default_sigalg[idx]);
0972bc5c 1370
54e3efff
MC		 1371 if (lu == NULL)
1372 return NULL;
c8f6c28a 1373 if (!tls1_lookup_md(s->ctx, lu, NULL))
0972bc5c 1374 return NULL;
b0031e5d
KR		 1375 if (!tls12_sigalg_allowed(s, SSL_SECOP_SIGALG_SUPPORTED, lu))
1376 return NULL;
0972bc5c
DSH		 1377 return lu;
1378 }
b0031e5d
KR		 1379 if (!tls12_sigalg_allowed(s, SSL_SECOP_SIGALG_SUPPORTED, &legacy_rsa_sigalg))
1380 return NULL;
0972bc5c
DSH		 1381 return &legacy_rsa_sigalg;
1382}
1383/* Set peer sigalg based key type */
1384int tls1_set_peer_legacy_sigalg(SSL *s, const EVP_PKEY *pkey)
1385{
52fd27f9
DSH		 1386 size_t idx;
1387 const SIGALG_LOOKUP *lu;
0972bc5c 1388
52fd27f9
DSH		 1389 if (ssl_cert_lookup_by_pkey(pkey, &idx) == NULL)
1390 return 0;
1391 lu = tls1_get_legacy_sigalg(s, idx);
0972bc5c
DSH		 1392 if (lu == NULL)
1393 return 0;
555cbb32 1394 s->s3.tmp.peer_sigalg = lu;
0972bc5c
DSH		 1395 return 1;
1396}
703bcee0 1397
98c792d1 1398size_t tls12_get_psigalgs(SSL *s, int sent, const uint16_t **psigs)
0f113f3e
MC		 1399{
1400 /*
1401 * If Suite B mode use Suite B sigalgs only, ignore any other
1402 * preferences.
1403 */
0f113f3e
MC		 1404 switch (tls1_suiteb(s)) {
1405 case SSL_CERT_FLAG_SUITEB_128_LOS:
1406 *psigs = suiteb_sigalgs;
7a531ee4 1407 return OSSL_NELEM(suiteb_sigalgs);
0f113f3e
MC		 1408
1409 case SSL_CERT_FLAG_SUITEB_128_LOS_ONLY:
1410 *psigs = suiteb_sigalgs;
7a531ee4 1411 return 1;
0f113f3e
MC		 1412
1413 case SSL_CERT_FLAG_SUITEB_192_LOS:
7a531ee4
MC		 1414 *psigs = suiteb_sigalgs + 1;
1415 return 1;
0f113f3e 1416 }
a9669ddc
DSH		 1417 /*
1418 * We use client_sigalgs (if not NULL) if we're a server
1419 * and sending a certificate request or if we're a client and
1420 * determining which shared algorithm to use.
1421 */
1422 if ((s->server == sent) && s->cert->client_sigalgs != NULL) {
0f113f3e
MC		 1423 *psigs = s->cert->client_sigalgs;
1424 return s->cert->client_sigalgslen;
1425 } else if (s->cert->conf_sigalgs) {
1426 *psigs = s->cert->conf_sigalgs;
1427 return s->cert->conf_sigalgslen;
1428 } else {
1429 *psigs = tls12_sigalgs;
703bcee0 1430 return OSSL_NELEM(tls12_sigalgs);
0f113f3e
MC		 1431 }
1432}
1433
de4dc598
MC		 1434/*
1435 * Called by servers only. Checks that we have a sig alg that supports the
1436 * specified EC curve.
1437 */
1438int tls_check_sigalg_curve(const SSL *s, int curve)
1439{
1440 const uint16_t *sigs;
1441 size_t siglen, i;
1442
1443 if (s->cert->conf_sigalgs) {
1444 sigs = s->cert->conf_sigalgs;
1445 siglen = s->cert->conf_sigalgslen;
1446 } else {
1447 sigs = tls12_sigalgs;
1448 siglen = OSSL_NELEM(tls12_sigalgs);
1449 }
1450
1451 for (i = 0; i < siglen; i++) {
263ff2c9 1452 const SIGALG_LOOKUP *lu = tls1_lookup_sigalg(s, sigs[i]);
de4dc598
MC		 1453
1454 if (lu == NULL)
1455 continue;
1456 if (lu->sig == EVP_PKEY_EC
1457 && lu->curve != NID_undef
1458 && curve == lu->curve)
1459 return 1;
1460 }
1461
1462 return 0;
1463}
1464
620c97b6
KR		 1465/*
1466 * Return the number of security bits for the signature algorithm, or 0 on
1467 * error.
1468 */
1469static int sigalg_security_bits(SSL_CTX *ctx, const SIGALG_LOOKUP *lu)
1470{
1471 const EVP_MD *md = NULL;
1472 int secbits = 0;
1473
1474 if (!tls1_lookup_md(ctx, lu, &md))
1475 return 0;
1476 if (md != NULL)
1477 {
ed576acd 1478 int md_type = EVP_MD_get_type(md);
aba03ae5 1479
620c97b6 1480 /* Security bits: half digest bits */
ed576acd 1481 secbits = EVP_MD_get_size(md) * 4;
aba03ae5
KR		 1482 /*
1483 * SHA1 and MD5 are known to be broken. Reduce security bits so that
1484 * they're no longer accepted at security level 1. The real values don't
1485 * really matter as long as they're lower than 80, which is our
1486 * security level 1.
1487 * https://eprint.iacr.org/2020/014 puts a chosen-prefix attack for
1488 * SHA1 at 2^63.4 and MD5+SHA1 at 2^67.2
1489 * https://documents.epfl.ch/users/l/le/lenstra/public/papers/lat.pdf
1490 * puts a chosen-prefix attack for MD5 at 2^39.
5ea4d764 1491 */
aba03ae5
KR		 1492 if (md_type == NID_sha1)
1493 secbits = 64;
1494 else if (md_type == NID_md5_sha1)
1495 secbits = 67;
1496 else if (md_type == NID_md5)
1497 secbits = 39;
620c97b6
KR		 1498 } else {
1499 /* Values from https://tools.ietf.org/html/rfc8032#section-8.5 */
1500 if (lu->sigalg == TLSEXT_SIGALG_ed25519)
1501 secbits = 128;
1502 else if (lu->sigalg == TLSEXT_SIGALG_ed448)
1503 secbits = 224;
1504 }
1505 return secbits;
1506}
1507
0f113f3e
MC		 1508/*
1509 * Check signature algorithm is consistent with sent supported signature
b2eb6998
DSH		 1510 * algorithms and if so set relevant digest and signature scheme in
1511 * s.
ec4a50b3 1512 */
f742cda8 1513int tls12_check_peer_sigalg(SSL *s, uint16_t sig, EVP_PKEY *pkey)
0f113f3e 1514{
98c792d1 1515 const uint16_t *sent_sigs;
5554facb 1516 const EVP_MD *md = NULL;
703bcee0 1517 char sigalgstr[2];
11d2641f 1518 size_t sent_sigslen, i, cidx;
c2041da8 1519 int pkeyid = -1;
f742cda8 1520 const SIGALG_LOOKUP *lu;
620c97b6 1521 int secbits = 0;
4d43ee28 1522
ed576acd 1523 pkeyid = EVP_PKEY_get_id(pkey);
0f113f3e 1524 /* Should never happen */
536199ec 1525 if (pkeyid == -1)
0f113f3e 1526 return -1;
5a8916d9
DSH		 1527 if (SSL_IS_TLS13(s)) {
1528 /* Disallow DSA for TLS 1.3 */
1529 if (pkeyid == EVP_PKEY_DSA) {
c48ffbcc 1530 SSLfatal(s, SSL_AD_ILLEGAL_PARAMETER, SSL_R_WRONG_SIGNATURE_TYPE);
5a8916d9
DSH		 1531 return 0;
1532 }
1533 /* Only allow PSS for TLS 1.3 */
1534 if (pkeyid == EVP_PKEY_RSA)
1535 pkeyid = EVP_PKEY_RSA_PSS;
1536 }
263ff2c9 1537 lu = tls1_lookup_sigalg(s, sig);
f742cda8 1538 /*
d8311fc9
MC		 1539 * Check sigalgs is known. Disallow SHA1/SHA224 with TLS 1.3. Check key type
1540 * is consistent with signature: RSA keys can be used for RSA-PSS
f742cda8 1541 */
d8311fc9
MC		 1542 if (lu == NULL
1543 || (SSL_IS_TLS13(s) && (lu->hash == NID_sha1 || lu->hash == NID_sha224))
095a982b 1544 || (pkeyid != lu->sig
f742cda8 1545 && (lu->sig != EVP_PKEY_RSA_PSS || pkeyid != EVP_PKEY_RSA))) {
c48ffbcc 1546 SSLfatal(s, SSL_AD_ILLEGAL_PARAMETER, SSL_R_WRONG_SIGNATURE_TYPE);
0f113f3e
MC		 1547 return 0;
1548 }
11d2641f 1549 /* Check the sigalg is consistent with the key OID */
ed576acd 1550 if (!ssl_cert_lookup_by_nid(EVP_PKEY_get_id(pkey), &cidx)
11d2641f 1551 || lu->sig_idx != (int)cidx) {
c48ffbcc 1552 SSLfatal(s, SSL_AD_ILLEGAL_PARAMETER, SSL_R_WRONG_SIGNATURE_TYPE);
11d2641f
MC		 1553 return 0;
1554 }
1555
fe3066ee 1556 if (pkeyid == EVP_PKEY_EC) {
44b6318f 1557
4a1b4280
DSH		 1558 /* Check point compression is permitted */
1559 if (!tls1_check_pkey_comp(s, pkey)) {
f63a17d6 1560 SSLfatal(s, SSL_AD_ILLEGAL_PARAMETER,
f63a17d6 1561 SSL_R_ILLEGAL_POINT_COMPRESSION);
4a1b4280
DSH		 1562 return 0;
1563 }
1564
1565 /* For TLS 1.3 or Suite B check curve matches signature algorithm */
1566 if (SSL_IS_TLS13(s) || tls1_suiteb(s)) {
d8975dec 1567 int curve = ssl_get_EC_curve_nid(pkey);
4a1b4280 1568
a34a9df0 1569 if (lu->curve != NID_undef && curve != lu->curve) {
c48ffbcc 1570 SSLfatal(s, SSL_AD_ILLEGAL_PARAMETER, SSL_R_WRONG_CURVE);
8f88cb53
DSH		 1571 return 0;
1572 }
4a1b4280
DSH		 1573 }
1574 if (!SSL_IS_TLS13(s)) {
1575 /* Check curve matches extensions */
dcf8b01f 1576 if (!tls1_check_group_id(s, tls1_get_group_id(pkey), 1)) {
c48ffbcc 1577 SSLfatal(s, SSL_AD_ILLEGAL_PARAMETER, SSL_R_WRONG_CURVE);
8f88cb53
DSH		 1578 return 0;
1579 }
8f88cb53 1580 if (tls1_suiteb(s)) {
f1adb006
DSH		 1581 /* Check sigalg matches a permissible Suite B value */
1582 if (sig != TLSEXT_SIGALG_ecdsa_secp256r1_sha256
1583 && sig != TLSEXT_SIGALG_ecdsa_secp384r1_sha384) {
f63a17d6 1584 SSLfatal(s, SSL_AD_HANDSHAKE_FAILURE,
f63a17d6 1585 SSL_R_WRONG_SIGNATURE_TYPE);
0f113f3e 1586 return 0;
f1adb006 1587 }
8f88cb53 1588 }
0f113f3e 1589 }
8f88cb53 1590 } else if (tls1_suiteb(s)) {
c48ffbcc 1591 SSLfatal(s, SSL_AD_HANDSHAKE_FAILURE, SSL_R_WRONG_SIGNATURE_TYPE);
0f113f3e 1592 return 0;
8f88cb53 1593 }
0f113f3e
MC		 1594
1595 /* Check signature matches a type we sent */
a9669ddc 1596 sent_sigslen = tls12_get_psigalgs(s, 1, &sent_sigs);
536199ec 1597 for (i = 0; i < sent_sigslen; i++, sent_sigs++) {
703bcee0 1598 if (sig == *sent_sigs)
0f113f3e
MC		 1599 break;
1600 }
1601 /* Allow fallback to SHA1 if not strict mode */
f742cda8
DSH		 1602 if (i == sent_sigslen && (lu->hash != NID_sha1
1603 || s->cert->cert_flags & SSL_CERT_FLAGS_CHECK_TLS_STRICT)) {
c48ffbcc 1604 SSLfatal(s, SSL_AD_HANDSHAKE_FAILURE, SSL_R_WRONG_SIGNATURE_TYPE);
0f113f3e
MC		 1605 return 0;
1606 }
c8f6c28a 1607 if (!tls1_lookup_md(s->ctx, lu, &md)) {
c48ffbcc 1608 SSLfatal(s, SSL_AD_HANDSHAKE_FAILURE, SSL_R_UNKNOWN_DIGEST);
f63a17d6 1609 return 0;
0f113f3e 1610 }
620c97b6
KR		 1611 /*
1612 * Make sure security callback allows algorithm. For historical
1613 * reasons we have to pass the sigalg as a two byte char array.
1614 */
1615 sigalgstr[0] = (sig >> 8) & 0xff;
1616 sigalgstr[1] = sig & 0xff;
1617 secbits = sigalg_security_bits(s->ctx, lu);
1618 if (secbits == 0 ||
1619 !ssl_security(s, SSL_SECOP_SIGALG_CHECK, secbits,
ed576acd 1620 md != NULL ? EVP_MD_get_type(md) : NID_undef,
620c97b6 1621 (void *)sigalgstr)) {
c48ffbcc 1622 SSLfatal(s, SSL_AD_HANDSHAKE_FAILURE, SSL_R_WRONG_SIGNATURE_TYPE);
620c97b6 1623 return 0;
0f113f3e 1624 }
6cbebb55 1625 /* Store the sigalg the peer uses */
555cbb32 1626 s->s3.tmp.peer_sigalg = lu;
0f113f3e
MC		 1627 return 1;
1628}
2ea80354 1629
42ef7aea
DSH		 1630int SSL_get_peer_signature_type_nid(const SSL *s, int *pnid)
1631{
555cbb32 1632 if (s->s3.tmp.peer_sigalg == NULL)
42ef7aea 1633 return 0;
555cbb32 1634 *pnid = s->s3.tmp.peer_sigalg->sig;
42ef7aea
DSH		 1635 return 1;
1636}
1637
a51c9f63
VD		 1638int SSL_get_signature_type_nid(const SSL *s, int *pnid)
1639{
555cbb32 1640 if (s->s3.tmp.sigalg == NULL)
a51c9f63 1641 return 0;
555cbb32 1642 *pnid = s->s3.tmp.sigalg->sig;
a51c9f63
VD		 1643 return 1;
1644}
1645
0f113f3e 1646/*
3eb2aff4
KR		 1647 * Set a mask of disabled algorithms: an algorithm is disabled if it isn't
1648 * supported, doesn't appear in supported signature algorithms, isn't supported
1649 * by the enabled protocol versions or by the security level.
1650 *
1651 * This function should only be used for checking which ciphers are supported
1652 * by the client.
1653 *
1654 * Call ssl_cipher_disabled() to check that it's enabled or not.
b7bfe69b 1655 */
1d0c08b4 1656int ssl_set_client_disabled(SSL *s)
0f113f3e 1657{
555cbb32
TS		 1658 s->s3.tmp.mask_a = 0;
1659 s->s3.tmp.mask_k = 0;
1660 ssl_set_sig_mask(&s->s3.tmp.mask_a, s, SSL_SECOP_SIGALG_MASK);
1661 if (ssl_get_min_max_version(s, &s->s3.tmp.min_ver,
1662 &s->s3.tmp.max_ver, NULL) != 0)
1d0c08b4 1663 return 0;
a230b26e 1664#ifndef OPENSSL_NO_PSK
0f113f3e
MC		 1665 /* with PSK there must be client callback set */
1666 if (!s->psk_client_callback) {
555cbb32
TS		 1667 s->s3.tmp.mask_a |= SSL_aPSK;
1668 s->s3.tmp.mask_k |= SSL_PSK;
0f113f3e 1669 }
a230b26e 1670#endif /* OPENSSL_NO_PSK */
e481f9b9 1671#ifndef OPENSSL_NO_SRP
0f113f3e 1672 if (!(s->srp_ctx.srp_Mask & SSL_kSRP)) {
555cbb32
TS		 1673 s->s3.tmp.mask_a |= SSL_aSRP;
1674 s->s3.tmp.mask_k |= SSL_kSRP;
0f113f3e 1675 }
e481f9b9 1676#endif
1d0c08b4 1677 return 1;
0f113f3e 1678}
fc101f88 1679
3eb2aff4
KR		 1680/*
1681 * ssl_cipher_disabled - check that a cipher is disabled or not
1682 * @s: SSL connection that you want to use the cipher on
1683 * @c: cipher to check
1684 * @op: Security check that you want to do
8af91fd9 1685 * @ecdhe: If set to 1 then TLSv1 ECDHE ciphers are also allowed in SSLv3
3eb2aff4
KR		 1686 *
1687 * Returns 1 when it's disabled, 0 when enabled.
1688 */
b0031e5d 1689int ssl_cipher_disabled(const SSL *s, const SSL_CIPHER *c, int op, int ecdhe)
0f113f3e 1690{
555cbb32
TS		 1691 if (c->algorithm_mkey & s->s3.tmp.mask_k
1692 || c->algorithm_auth & s->s3.tmp.mask_a)
0f113f3e 1693 return 1;
555cbb32 1694 if (s->s3.tmp.max_ver == 0)
3eb2aff4 1695 return 1;
8af91fd9
MC		 1696 if (!SSL_IS_DTLS(s)) {
1697 int min_tls = c->min_tls;
1698
1699 /*
1700 * For historical reasons we will allow ECHDE to be selected by a server
1701 * in SSLv3 if we are a client
1702 */
1703 if (min_tls == TLS1_VERSION && ecdhe
1704 && (c->algorithm_mkey & (SSL_kECDHE | SSL_kECDHEPSK)) != 0)
1705 min_tls = SSL3_VERSION;
1706
555cbb32 1707 if ((min_tls > s->s3.tmp.max_ver) || (c->max_tls < s->s3.tmp.min_ver))
8af91fd9
MC		 1708 return 1;
1709 }
555cbb32
TS		 1710 if (SSL_IS_DTLS(s) && (DTLS_VERSION_GT(c->min_dtls, s->s3.tmp.max_ver)
1711 || DTLS_VERSION_LT(c->max_dtls, s->s3.tmp.min_ver)))
3eb2aff4
KR		 1712 return 1;
1713
0f113f3e
MC		 1714 return !ssl_security(s, op, c->strength_bits, 0, (void *)c);
1715}
b362ccab 1716
7da160b0 1717int tls_use_ticket(SSL *s)
0f113f3e 1718{
08191294 1719 if ((s->options & SSL_OP_NO_TICKET))
0f113f3e
MC		 1720 return 0;
1721 return ssl_security(s, SSL_SECOP_TICKET, 0, 0, NULL);
1722}
ed3883d2 1723
e469af8d 1724int tls1_set_server_sigalgs(SSL *s)
0f113f3e 1725{
0f113f3e 1726 size_t i;
8483a003
F		 1727
1728 /* Clear any shared signature algorithms */
29948ac8
BK		 1729 OPENSSL_free(s->shared_sigalgs);
1730 s->shared_sigalgs = NULL;
1731 s->shared_sigalgslen = 0;
9195ddcd
DSH		 1732 /* Clear certificate validity flags */
1733 for (i = 0; i < SSL_PKEY_NUM; i++)
555cbb32 1734 s->s3.tmp.valid_flags[i] = 0;
a8bb912d
DSH		 1735 /*
1736 * If peer sent no signature algorithms check to see if we support
1737 * the default algorithm for each certificate type
1738 */
555cbb32
TS		 1739 if (s->s3.tmp.peer_cert_sigalgs == NULL
1740 && s->s3.tmp.peer_sigalgs == NULL) {
a8bb912d
DSH		 1741 const uint16_t *sent_sigs;
1742 size_t sent_sigslen = tls12_get_psigalgs(s, 1, &sent_sigs);
0f113f3e 1743
a8bb912d
DSH		 1744 for (i = 0; i < SSL_PKEY_NUM; i++) {
1745 const SIGALG_LOOKUP *lu = tls1_get_legacy_sigalg(s, i);
1746 size_t j;
1747
1748 if (lu == NULL)
1749 continue;
1750 /* Check default matches a type we sent */
1751 for (j = 0; j < sent_sigslen; j++) {
1752 if (lu->sigalg == sent_sigs[j]) {
555cbb32 1753 s->s3.tmp.valid_flags[i] = CERT_PKEY_SIGN;
a8bb912d
DSH		 1754 break;
1755 }
1756 }
1757 }
9195ddcd 1758 return 1;
a8bb912d 1759 }
9195ddcd
DSH		 1760
1761 if (!tls1_process_sigalgs(s)) {
c48ffbcc 1762 SSLfatal(s, SSL_AD_INTERNAL_ERROR, ERR_R_INTERNAL_ERROR);
f63a17d6 1763 return 0;
d376e57d 1764 }
29948ac8 1765 if (s->shared_sigalgs != NULL)
9195ddcd 1766 return 1;
f63a17d6 1767
fb34a0f4 1768 /* Fatal error if no shared signature algorithms */
c48ffbcc 1769 SSLfatal(s, SSL_AD_HANDSHAKE_FAILURE,
f63a17d6 1770 SSL_R_NO_SHARED_SIGNATURE_ALGORITHMS);
0f113f3e
MC		 1771 return 0;
1772}
e469af8d 1773
1d97c843 1774/*-
1ab3836b 1775 * Gets the ticket information supplied by the client if any.
e7f0d921 1776 *
1ab3836b 1777 * hello: The parsed ClientHello data
c519e89f
BM		 1778 * ret: (output) on return, if a ticket was decrypted, then this is set to
1779 * point to the resulting session.
6434abbf 1780 */
61fb5923 1781SSL_TICKET_STATUS tls_get_ticket_from_client(SSL *s, CLIENTHELLO_MSG *hello,
df0fed9a 1782 SSL_SESSION **ret)
0f113f3e 1783{
1ab3836b
MC		 1784 size_t size;
1785 RAW_EXTENSION *ticketext;
e7f0d921 1786
0f113f3e 1787 *ret = NULL;
aff8c126 1788 s->ext.ticket_expected = 0;
0f113f3e
MC		 1789
1790 /*
9362c93e
MC		 1791 * If tickets disabled or not supported by the protocol version
1792 * (e.g. TLSv1.3) behave as if no ticket present to permit stateful
0f113f3e
MC		 1793 * resumption.
1794 */
1ab3836b 1795 if (s->version <= SSL3_VERSION || !tls_use_ticket(s))
df0fed9a 1796 return SSL_TICKET_NONE;
9ceb2426 1797
70af3d8e
MC		 1798 ticketext = &hello->pre_proc_exts[TLSEXT_IDX_session_ticket];
1799 if (!ticketext->present)
df0fed9a 1800 return SSL_TICKET_NONE;
1ab3836b
MC		 1801
1802 size = PACKET_remaining(&ticketext->data);
70af3d8e 1803
c0638ade 1804 return tls_decrypt_ticket(s, PACKET_data(&ticketext->data), size,
70af3d8e 1805 hello->session_id, hello->session_id_len, ret);
1ab3836b
MC		 1806}
1807
1d97c843
TH		 1808/*-
1809 * tls_decrypt_ticket attempts to decrypt a session ticket.
c519e89f 1810 *
61fb5923
MC		 1811 * If s->tls_session_secret_cb is set and we're not doing TLSv1.3 then we are
1812 * expecting a pre-shared key ciphersuite, in which case we have no use for
1813 * session tickets and one will never be decrypted, nor will
1814 * s->ext.ticket_expected be set to 1.
1815 *
1816 * Side effects:
1817 * Sets s->ext.ticket_expected to 1 if the server will have to issue
1818 * a new session ticket to the client because the client indicated support
1819 * (and s->tls_session_secret_cb is NULL) but the client either doesn't have
1820 * a session ticket or we couldn't use the one it gave us, or if
1821 * s->ctx->ext.ticket_key_cb asked to renew the client's ticket.
1822 * Otherwise, s->ext.ticket_expected is set to 0.
1823 *
c519e89f 1824 * etick: points to the body of the session ticket extension.
8483a003 1825 * eticklen: the length of the session tickets extension.
c519e89f
BM		 1826 * sess_id: points at the session ID.
1827 * sesslen: the length of the session ID.
1828 * psess: (output) on return, if a ticket was decrypted, then this is set to
1829 * point to the resulting session.
c519e89f 1830 */
61fb5923 1831SSL_TICKET_STATUS tls_decrypt_ticket(SSL *s, const unsigned char *etick,
df0fed9a
TS		 1832 size_t eticklen, const unsigned char *sess_id,
1833 size_t sesslen, SSL_SESSION **psess)
0f113f3e 1834{
61fb5923 1835 SSL_SESSION *sess = NULL;
0f113f3e
MC		 1836 unsigned char *sdec;
1837 const unsigned char *p;
ddf6ec00 1838 int slen, renew_ticket = 0, declen;
61fb5923 1839 SSL_TICKET_STATUS ret = SSL_TICKET_FATAL_ERR_OTHER;
348240c6 1840 size_t mlen;
0f113f3e 1841 unsigned char tick_hmac[EVP_MAX_MD_SIZE];
a76ce286 1842 SSL_HMAC *hctx = NULL;
ee763495 1843 EVP_CIPHER_CTX *ctx = NULL;
222da979 1844 SSL_CTX *tctx = s->session_ctx;
e97763c9 1845
61fb5923
MC		 1846 if (eticklen == 0) {
1847 /*
1848 * The client will accept a ticket but doesn't currently have
1849 * one (TLSv1.2 and below), or treated as a fatal error in TLSv1.3
1850 */
1851 ret = SSL_TICKET_EMPTY;
1852 goto end;
1853 }
1854 if (!SSL_IS_TLS13(s) && s->ext.session_secret_cb) {
1855 /*
1856 * Indicate that the ticket couldn't be decrypted rather than
1857 * generating the session from ticket now, trigger
1858 * abbreviated handshake based on external mechanism to
1859 * calculate the master secret later.
1860 */
1861 ret = SSL_TICKET_NO_DECRYPT;
1862 goto end;
1863 }
1864
ee763495
MC		 1865 /* Need at least keyname + iv */
1866 if (eticklen < TLSEXT_KEYNAME_LENGTH + EVP_MAX_IV_LENGTH) {
df0fed9a 1867 ret = SSL_TICKET_NO_DECRYPT;
c0638ade 1868 goto end;
ee763495
MC		 1869 }
1870
0f113f3e 1871 /* Initialize session ticket encryption and HMAC contexts */
a76ce286 1872 hctx = ssl_hmac_new(tctx);
c0638ade
MC		 1873 if (hctx == NULL) {
1874 ret = SSL_TICKET_FATAL_ERR_MALLOC;
1875 goto end;
1876 }
846ec07d 1877 ctx = EVP_CIPHER_CTX_new();
35b1a433 1878 if (ctx == NULL) {
df0fed9a 1879 ret = SSL_TICKET_FATAL_ERR_MALLOC;
c0638ade 1880 goto end;
35b1a433 1881 }
a76ce286
P		 1882#ifndef OPENSSL_NO_DEPRECATED_3_0
1883 if (tctx->ext.ticket_key_evp_cb != NULL || tctx->ext.ticket_key_cb != NULL)
1884#else
1885 if (tctx->ext.ticket_key_evp_cb != NULL)
1886#endif
1887 {
0f113f3e 1888 unsigned char *nctick = (unsigned char *)etick;
a76ce286
P		 1889 int rv = 0;
1890
1891 if (tctx->ext.ticket_key_evp_cb != NULL)
1892 rv = tctx->ext.ticket_key_evp_cb(s, nctick,
1893 nctick + TLSEXT_KEYNAME_LENGTH,
1894 ctx,
1895 ssl_hmac_get0_EVP_MAC_CTX(hctx),
1896 0);
1897#ifndef OPENSSL_NO_DEPRECATED_3_0
1898 else if (tctx->ext.ticket_key_cb != NULL)
1899 /* if 0 is returned, write an empty ticket */
1900 rv = tctx->ext.ticket_key_cb(s, nctick,
ee763495 1901 nctick + TLSEXT_KEYNAME_LENGTH,
a76ce286
P		 1902 ctx, ssl_hmac_get0_HMAC_CTX(hctx), 0);
1903#endif
c0638ade
MC		 1904 if (rv < 0) {
1905 ret = SSL_TICKET_FATAL_ERR_OTHER;
1906 goto end;
1907 }
35b1a433 1908 if (rv == 0) {
df0fed9a 1909 ret = SSL_TICKET_NO_DECRYPT;
c0638ade 1910 goto end;
35b1a433 1911 }
0f113f3e
MC		 1912 if (rv == 2)
1913 renew_ticket = 1;
1914 } else {
148bfd26
MC		 1915 EVP_CIPHER *aes256cbc = NULL;
1916
0f113f3e 1917 /* Check key name matches */
aff8c126 1918 if (memcmp(etick, tctx->ext.tick_key_name,
ee763495 1919 TLSEXT_KEYNAME_LENGTH) != 0) {
df0fed9a 1920 ret = SSL_TICKET_NO_DECRYPT;
c0638ade 1921 goto end;
35b1a433 1922 }
148bfd26
MC		 1923
1924 aes256cbc = EVP_CIPHER_fetch(s->ctx->libctx, "AES-256-CBC",
1925 s->ctx->propq);
1926 if (aes256cbc == NULL
1927 || ssl_hmac_init(hctx, tctx->ext.secure->tick_hmac_key,
1928 sizeof(tctx->ext.secure->tick_hmac_key),
1929 "SHA256") <= 0
1930 || EVP_DecryptInit_ex(ctx, aes256cbc, NULL,
4bfb96f2 1931 tctx->ext.secure->tick_aes_key,
ee763495 1932 etick + TLSEXT_KEYNAME_LENGTH) <= 0) {
148bfd26 1933 EVP_CIPHER_free(aes256cbc);
c0638ade
MC		 1934 ret = SSL_TICKET_FATAL_ERR_OTHER;
1935 goto end;
a230b26e 1936 }
148bfd26 1937 EVP_CIPHER_free(aes256cbc);
c0638ade
MC		 1938 if (SSL_IS_TLS13(s))
1939 renew_ticket = 1;
0f113f3e
MC		 1940 }
1941 /*
1942 * Attempt to process session ticket, first conduct sanity and integrity
1943 * checks on ticket.
1944 */
a76ce286 1945 mlen = ssl_hmac_size(hctx);
348240c6 1946 if (mlen == 0) {
c0638ade
MC		 1947 ret = SSL_TICKET_FATAL_ERR_OTHER;
1948 goto end;
0f113f3e 1949 }
c0638ade 1950
e97763c9
DSH		 1951 /* Sanity check ticket length: must exceed keyname + IV + HMAC */
1952 if (eticklen <=
ed576acd 1953 TLSEXT_KEYNAME_LENGTH + EVP_CIPHER_CTX_get_iv_length(ctx) + mlen) {
df0fed9a 1954 ret = SSL_TICKET_NO_DECRYPT;
c0638ade 1955 goto end;
e97763c9 1956 }
0f113f3e
MC		 1957 eticklen -= mlen;
1958 /* Check HMAC of encrypted ticket */
a76ce286
P		 1959 if (ssl_hmac_update(hctx, etick, eticklen) <= 0
1960 || ssl_hmac_final(hctx, tick_hmac, NULL, sizeof(tick_hmac)) <= 0) {
c0638ade
MC		 1961 ret = SSL_TICKET_FATAL_ERR_OTHER;
1962 goto end;
5f3d93e4 1963 }
c0638ade 1964
0f113f3e 1965 if (CRYPTO_memcmp(tick_hmac, etick + eticklen, mlen)) {
c0638ade
MC		 1966 ret = SSL_TICKET_NO_DECRYPT;
1967 goto end;
0f113f3e
MC		 1968 }
1969 /* Attempt to decrypt session data */
1970 /* Move p after IV to start of encrypted ticket, update length */
ed576acd
TM		 1971 p = etick + TLSEXT_KEYNAME_LENGTH + EVP_CIPHER_CTX_get_iv_length(ctx);
1972 eticklen -= TLSEXT_KEYNAME_LENGTH + EVP_CIPHER_CTX_get_iv_length(ctx);
0f113f3e 1973 sdec = OPENSSL_malloc(eticklen);
348240c6
MC		 1974 if (sdec == NULL || EVP_DecryptUpdate(ctx, sdec, &slen, p,
1975 (int)eticklen) <= 0) {
d1247df2 1976 OPENSSL_free(sdec);
c0638ade
MC		 1977 ret = SSL_TICKET_FATAL_ERR_OTHER;
1978 goto end;
0f113f3e 1979 }
348240c6 1980 if (EVP_DecryptFinal(ctx, sdec + slen, &declen) <= 0) {
0f113f3e 1981 OPENSSL_free(sdec);
c0638ade
MC		 1982 ret = SSL_TICKET_NO_DECRYPT;
1983 goto end;
0f113f3e 1984 }
348240c6 1985 slen += declen;
0f113f3e
MC		 1986 p = sdec;
1987
1988 sess = d2i_SSL_SESSION(NULL, &p, slen);
d3bc9805 1989 slen -= p - sdec;
0f113f3e
MC		 1990 OPENSSL_free(sdec);
1991 if (sess) {
79020b27 1992 /* Some additional consistency checks */
32305f88 1993 if (slen != 0) {
79020b27 1994 SSL_SESSION_free(sess);
5f96a95e 1995 sess = NULL;
c0638ade
MC		 1996 ret = SSL_TICKET_NO_DECRYPT;
1997 goto end;
79020b27 1998 }
0f113f3e
MC		 1999 /*
2000 * The session ID, if non-empty, is used by some clients to detect
2001 * that the ticket has been accepted. So we copy it to the session
2002 * structure. If it is empty set length to zero as required by
2003 * standard.
2004 */
32305f88 2005 if (sesslen) {
0f113f3e 2006 memcpy(sess->session_id, sess_id, sesslen);
32305f88
MC		 2007 sess->session_id_length = sesslen;
2008 }
0f113f3e 2009 if (renew_ticket)
c0638ade 2010 ret = SSL_TICKET_SUCCESS_RENEW;
0f113f3e 2011 else
c0638ade
MC		 2012 ret = SSL_TICKET_SUCCESS;
2013 goto end;
0f113f3e
MC		 2014 }
2015 ERR_clear_error();
2016 /*
2017 * For session parse failure, indicate that we need to send a new ticket.
2018 */
c0638ade
MC		 2019 ret = SSL_TICKET_NO_DECRYPT;
2020
2021 end:
846ec07d 2022 EVP_CIPHER_CTX_free(ctx);
a76ce286 2023 ssl_hmac_free(hctx);
c0638ade
MC		 2024
2025 /*
61fb5923
MC		 2026 * If set, the decrypt_ticket_cb() is called unless a fatal error was
2027 * detected above. The callback is responsible for checking |ret| before it
2028 * performs any action
c0638ade 2029 */
61fb5923
MC		 2030 if (s->session_ctx->decrypt_ticket_cb != NULL
2031 && (ret == SSL_TICKET_EMPTY
2032 || ret == SSL_TICKET_NO_DECRYPT
2033 || ret == SSL_TICKET_SUCCESS
2034 || ret == SSL_TICKET_SUCCESS_RENEW)) {
c0638ade 2035 size_t keyname_len = eticklen;
61fb5923 2036 int retcb;
c0638ade
MC		 2037
2038 if (keyname_len > TLSEXT_KEYNAME_LENGTH)
2039 keyname_len = TLSEXT_KEYNAME_LENGTH;
61fb5923
MC		 2040 retcb = s->session_ctx->decrypt_ticket_cb(s, sess, etick, keyname_len,
2041 ret,
2042 s->session_ctx->ticket_cb_data);
2043 switch (retcb) {
2044 case SSL_TICKET_RETURN_ABORT:
2045 ret = SSL_TICKET_FATAL_ERR_OTHER;
2046 break;
2047
2048 case SSL_TICKET_RETURN_IGNORE:
2049 ret = SSL_TICKET_NONE;
2050 SSL_SESSION_free(sess);
2051 sess = NULL;
2052 break;
2053
2054 case SSL_TICKET_RETURN_IGNORE_RENEW:
2055 if (ret != SSL_TICKET_EMPTY && ret != SSL_TICKET_NO_DECRYPT)
2056 ret = SSL_TICKET_NO_DECRYPT;
2057 /* else the value of |ret| will already do the right thing */
2058 SSL_SESSION_free(sess);
2059 sess = NULL;
2060 break;
2061
2062 case SSL_TICKET_RETURN_USE:
2063 case SSL_TICKET_RETURN_USE_RENEW:
2064 if (ret != SSL_TICKET_SUCCESS
2065 && ret != SSL_TICKET_SUCCESS_RENEW)
2066 ret = SSL_TICKET_FATAL_ERR_OTHER;
2067 else if (retcb == SSL_TICKET_RETURN_USE)
2068 ret = SSL_TICKET_SUCCESS;
2069 else
2070 ret = SSL_TICKET_SUCCESS_RENEW;
2071 break;
2072
2073 default:
2074 ret = SSL_TICKET_FATAL_ERR_OTHER;
2075 }
c0638ade
MC		 2076 }
2077
309371d6
MC		 2078 if (s->ext.session_secret_cb == NULL || SSL_IS_TLS13(s)) {
2079 switch (ret) {
2080 case SSL_TICKET_NO_DECRYPT:
2081 case SSL_TICKET_SUCCESS_RENEW:
2082 case SSL_TICKET_EMPTY:
2083 s->ext.ticket_expected = 1;
2084 }
c0638ade
MC		 2085 }
2086
61fb5923
MC		 2087 *psess = sess;
2088
2089 return ret;
0f113f3e 2090}
6434abbf 2091
b362ccab 2092/* Check to see if a signature algorithm is allowed */
b0031e5d 2093static int tls12_sigalg_allowed(const SSL *s, int op, const SIGALG_LOOKUP *lu)
0f113f3e 2094{
703bcee0 2095 unsigned char sigalgstr[2];
44b6318f 2096 int secbits;
703bcee0 2097
263ff2c9 2098 if (lu == NULL || !lu->enabled)
0f113f3e 2099 return 0;
224b4e37
DSH		 2100 /* DSA is not allowed in TLS 1.3 */
2101 if (SSL_IS_TLS13(s) && lu->sig == EVP_PKEY_DSA)
2102 return 0;
08cea586
MC		 2103 /*
2104 * At some point we should fully axe DSA/etc. in ClientHello as per TLS 1.3
2105 * spec
2106 */
555cbb32 2107 if (!s->server && !SSL_IS_DTLS(s) && s->s3.tmp.min_ver >= TLS1_3_VERSION
6ffeb269
BK		 2108 && (lu->sig == EVP_PKEY_DSA || lu->hash_idx == SSL_MD_SHA1_IDX
2109 || lu->hash_idx == SSL_MD_MD5_IDX
2110 || lu->hash_idx == SSL_MD_SHA224_IDX))
2111 return 0;
871980a9 2112
0f113f3e 2113 /* See if public key algorithm allowed */
a68eee67 2114 if (ssl_cert_is_disabled(s->ctx, lu->sig_idx))
0f113f3e 2115 return 0;
871980a9
MC		 2116
2117 if (lu->sig == NID_id_GostR3410_2012_256
2118 || lu->sig == NID_id_GostR3410_2012_512
2119 || lu->sig == NID_id_GostR3410_2001) {
2120 /* We never allow GOST sig algs on the server with TLSv1.3 */
2121 if (s->server && SSL_IS_TLS13(s))
2122 return 0;
2123 if (!s->server
2124 && s->method->version == TLS_ANY_VERSION
555cbb32 2125 && s->s3.tmp.max_ver >= TLS1_3_VERSION) {
871980a9
MC		 2126 int i, num;
2127 STACK_OF(SSL_CIPHER) *sk;
2128
2129 /*
2130 * We're a client that could negotiate TLSv1.3. We only allow GOST
2131 * sig algs if we could negotiate TLSv1.2 or below and we have GOST
2132 * ciphersuites enabled.
2133 */
2134
555cbb32 2135 if (s->s3.tmp.min_ver >= TLS1_3_VERSION)
871980a9
MC		 2136 return 0;
2137
2138 sk = SSL_get_ciphers(s);
2139 num = sk != NULL ? sk_SSL_CIPHER_num(sk) : 0;
2140 for (i = 0; i < num; i++) {
2141 const SSL_CIPHER *c;
2142
2143 c = sk_SSL_CIPHER_value(sk, i);
2144 /* Skip disabled ciphers */
2145 if (ssl_cipher_disabled(s, c, SSL_SECOP_CIPHER_SUPPORTED, 0))
2146 continue;
2147
5a5530a2 2148 if ((c->algorithm_mkey & (SSL_kGOST | SSL_kGOST18)) != 0)
871980a9
MC		 2149 break;
2150 }
2151 if (i == num)
2152 return 0;
2153 }
2154 }
2155
0f113f3e 2156 /* Finally see if security callback allows it */
620c97b6 2157 secbits = sigalg_security_bits(s->ctx, lu);
b0e9ab95
DSH		 2158 sigalgstr[0] = (lu->sigalg >> 8) & 0xff;
2159 sigalgstr[1] = lu->sigalg & 0xff;
44b6318f 2160 return ssl_security(s, op, secbits, lu->hash, (void *)sigalgstr);
0f113f3e
MC		 2161}
2162
2163/*
2164 * Get a mask of disabled public key algorithms based on supported signature
2165 * algorithms. For example if no signature algorithm supports RSA then RSA is
2166 * disabled.
b362ccab
DSH		 2167 */
2168
90d9e49a 2169void ssl_set_sig_mask(uint32_t *pmask_a, SSL *s, int op)
0f113f3e 2170{
98c792d1 2171 const uint16_t *sigalgs;
0f113f3e 2172 size_t i, sigalgslen;
13cc2574 2173 uint32_t disabled_mask = SSL_aRSA | SSL_aDSS | SSL_aECDSA;
0f113f3e 2174 /*
13cc2574
DSH		 2175 * Go through all signature algorithms seeing if we support any
2176 * in disabled_mask.
0f113f3e 2177 */
a9669ddc 2178 sigalgslen = tls12_get_psigalgs(s, 1, &sigalgs);
b2555168 2179 for (i = 0; i < sigalgslen; i++, sigalgs++) {
263ff2c9 2180 const SIGALG_LOOKUP *lu = tls1_lookup_sigalg(s, *sigalgs);
13cc2574 2181 const SSL_CERT_LOOKUP *clu;
b0e9ab95
DSH		 2182
2183 if (lu == NULL)
2184 continue;
13cc2574
DSH		 2185
2186 clu = ssl_cert_lookup_by_idx(lu->sig_idx);
dd6b2706
P		 2187 if (clu == NULL)
2188 continue;
13cc2574
DSH		 2189
2190 /* If algorithm is disabled see if we can enable it */
2191 if ((clu->amask & disabled_mask) != 0
2192 && tls12_sigalg_allowed(s, op, lu))
2193 disabled_mask &= ~clu->amask;
0f113f3e 2194 }
13cc2574 2195 *pmask_a |= disabled_mask;
0f113f3e 2196}
b362ccab 2197
ae2f7b37 2198int tls12_copy_sigalgs(SSL *s, WPACKET *pkt,
98c792d1 2199 const uint16_t *psig, size_t psiglen)
2c7b4dbc
MC		 2200{
2201 size_t i;
b0e9ab95 2202 int rv = 0;
c0f9e23c 2203
703bcee0 2204 for (i = 0; i < psiglen; i++, psig++) {
263ff2c9 2205 const SIGALG_LOOKUP *lu = tls1_lookup_sigalg(s, *psig);
b0e9ab95 2206
54e3efff
MC		 2207 if (lu == NULL
2208 || !tls12_sigalg_allowed(s, SSL_SECOP_SIGALG_SUPPORTED, lu))
b0e9ab95
DSH		 2209 continue;
2210 if (!WPACKET_put_bytes_u16(pkt, *psig))
2211 return 0;
2212 /*
2213 * If TLS 1.3 must have at least one valid TLS 1.3 message
d8311fc9 2214 * signing algorithm: i.e. neither RSA nor SHA1/SHA224
b0e9ab95
DSH		 2215 */
2216 if (rv == 0 && (!SSL_IS_TLS13(s)
d8311fc9
MC		 2217 || (lu->sig != EVP_PKEY_RSA
2218 && lu->hash != NID_sha1
2219 && lu->hash != NID_sha224)))
b0e9ab95 2220 rv = 1;
2c7b4dbc 2221 }
5528d68f 2222 if (rv == 0)
6849b73c 2223 ERR_raise(ERR_LIB_SSL, SSL_R_NO_SUITABLE_SIGNATURE_ALGORITHM);
b0e9ab95 2224 return rv;
2c7b4dbc
MC		 2225}
2226
4453cd8c 2227/* Given preference and allowed sigalgs set shared sigalgs */
4d43ee28 2228static size_t tls12_shared_sigalgs(SSL *s, const SIGALG_LOOKUP **shsig,
98c792d1
DSH		 2229 const uint16_t *pref, size_t preflen,
2230 const uint16_t *allow, size_t allowlen)
0f113f3e 2231{
98c792d1 2232 const uint16_t *ptmp, *atmp;
0f113f3e 2233 size_t i, j, nmatch = 0;
703bcee0 2234 for (i = 0, ptmp = pref; i < preflen; i++, ptmp++) {
263ff2c9 2235 const SIGALG_LOOKUP *lu = tls1_lookup_sigalg(s, *ptmp);
b0e9ab95 2236
0f113f3e 2237 /* Skip disabled hashes or signature algorithms */
54e3efff
MC		 2238 if (lu == NULL
2239 || !tls12_sigalg_allowed(s, SSL_SECOP_SIGALG_SHARED, lu))
0f113f3e 2240 continue;
703bcee0
MC		 2241 for (j = 0, atmp = allow; j < allowlen; j++, atmp++) {
2242 if (*ptmp == *atmp) {
0f113f3e 2243 nmatch++;
b0e9ab95
DSH		 2244 if (shsig)
2245 *shsig++ = lu;
0f113f3e
MC		 2246 break;
2247 }
2248 }
2249 }
2250 return nmatch;
2251}
4453cd8c
DSH		 2252
2253/* Set shared signature algorithms for SSL structures */
2254static int tls1_set_shared_sigalgs(SSL *s)
0f113f3e 2255{
98c792d1 2256 const uint16_t *pref, *allow, *conf;
0f113f3e
MC		 2257 size_t preflen, allowlen, conflen;
2258 size_t nmatch;
4d43ee28 2259 const SIGALG_LOOKUP **salgs = NULL;
0f113f3e
MC		 2260 CERT *c = s->cert;
2261 unsigned int is_suiteb = tls1_suiteb(s);
b548a1f1 2262
29948ac8
BK		 2263 OPENSSL_free(s->shared_sigalgs);
2264 s->shared_sigalgs = NULL;
2265 s->shared_sigalgslen = 0;
0f113f3e
MC		 2266 /* If client use client signature algorithms if not NULL */
2267 if (!s->server && c->client_sigalgs && !is_suiteb) {
2268 conf = c->client_sigalgs;
2269 conflen = c->client_sigalgslen;
2270 } else if (c->conf_sigalgs && !is_suiteb) {
2271 conf = c->conf_sigalgs;
2272 conflen = c->conf_sigalgslen;
2273 } else
a9669ddc 2274 conflen = tls12_get_psigalgs(s, 0, &conf);
0f113f3e
MC		 2275 if (s->options & SSL_OP_CIPHER_SERVER_PREFERENCE || is_suiteb) {
2276 pref = conf;
2277 preflen = conflen;
555cbb32
TS		 2278 allow = s->s3.tmp.peer_sigalgs;
2279 allowlen = s->s3.tmp.peer_sigalgslen;
0f113f3e
MC		 2280 } else {
2281 allow = conf;
2282 allowlen = conflen;
555cbb32
TS		 2283 pref = s->s3.tmp.peer_sigalgs;
2284 preflen = s->s3.tmp.peer_sigalgslen;
0f113f3e
MC		 2285 }
2286 nmatch = tls12_shared_sigalgs(s, NULL, pref, preflen, allow, allowlen);
34e3edbf 2287 if (nmatch) {
cdb10bae 2288 if ((salgs = OPENSSL_malloc(nmatch * sizeof(*salgs))) == NULL) {
6849b73c 2289 ERR_raise(ERR_LIB_SSL, ERR_R_MALLOC_FAILURE);
34e3edbf 2290 return 0;
cdb10bae 2291 }
34e3edbf
DSH		 2292 nmatch = tls12_shared_sigalgs(s, salgs, pref, preflen, allow, allowlen);
2293 } else {
2294 salgs = NULL;
2295 }
29948ac8
BK		 2296 s->shared_sigalgs = salgs;
2297 s->shared_sigalgslen = nmatch;
0f113f3e
MC		 2298 return 1;
2299}
4453cd8c 2300
9e84a42d 2301int tls1_save_u16(PACKET *pkt, uint16_t **pdest, size_t *pdestlen)
0f113f3e 2302{
98c792d1 2303 unsigned int stmp;
703bcee0 2304 size_t size, i;
9e84a42d 2305 uint16_t *buf;
0f113f3e 2306
703bcee0
MC		 2307 size = PACKET_remaining(pkt);
2308
2309 /* Invalid data length */
8f12296e 2310 if (size == 0 || (size & 1) != 0)
703bcee0
MC		 2311 return 0;
2312
2313 size >>= 1;
2314
cdb10bae 2315 if ((buf = OPENSSL_malloc(size * sizeof(*buf))) == NULL) {
6849b73c 2316 ERR_raise(ERR_LIB_SSL, ERR_R_MALLOC_FAILURE);
0f113f3e 2317 return 0;
cdb10bae 2318 }
98c792d1 2319 for (i = 0; i < size && PACKET_get_net_2(pkt, &stmp); i++)
9e84a42d 2320 buf[i] = stmp;
703bcee0 2321
9e84a42d
DSH		 2322 if (i != size) {
2323 OPENSSL_free(buf);
703bcee0 2324 return 0;
9e84a42d
DSH		 2325 }
2326
2327 OPENSSL_free(*pdest);
2328 *pdest = buf;
2329 *pdestlen = size;
703bcee0 2330
0f113f3e
MC		 2331 return 1;
2332}
6b7be581 2333
c589c34e 2334int tls1_save_sigalgs(SSL *s, PACKET *pkt, int cert)
9e84a42d
DSH		 2335{
2336 /* Extension ignored for inappropriate versions */
2337 if (!SSL_USE_SIGALGS(s))
2338 return 1;
2339 /* Should never happen */
2340 if (s->cert == NULL)
2341 return 0;
2342
c589c34e 2343 if (cert)
555cbb32
TS		 2344 return tls1_save_u16(pkt, &s->s3.tmp.peer_cert_sigalgs,
2345 &s->s3.tmp.peer_cert_sigalgslen);
c589c34e 2346 else
555cbb32
TS		 2347 return tls1_save_u16(pkt, &s->s3.tmp.peer_sigalgs,
2348 &s->s3.tmp.peer_sigalgslen);
9e84a42d 2349
9e84a42d
DSH		 2350}
2351
2352/* Set preferred digest for each key type */
2353
c800c27a 2354int tls1_process_sigalgs(SSL *s)
0f113f3e 2355{
0f113f3e 2356 size_t i;
555cbb32 2357 uint32_t *pvalid = s->s3.tmp.valid_flags;
4d43ee28 2358
0f113f3e
MC		 2359 if (!tls1_set_shared_sigalgs(s))
2360 return 0;
2361
9195ddcd
DSH		 2362 for (i = 0; i < SSL_PKEY_NUM; i++)
2363 pvalid[i] = 0;
2364
29948ac8
BK		 2365 for (i = 0; i < s->shared_sigalgslen; i++) {
2366 const SIGALG_LOOKUP *sigptr = s->shared_sigalgs[i];
9195ddcd 2367 int idx = sigptr->sig_idx;
4d43ee28 2368
523fb323 2369 /* Ignore PKCS1 based sig algs in TLSv1.3 */
4d43ee28 2370 if (SSL_IS_TLS13(s) && sigptr->sig == EVP_PKEY_RSA)
523fb323 2371 continue;
9195ddcd 2372 /* If not disabled indicate we can explicitly sign */
a68eee67 2373 if (pvalid[idx] == 0 && !ssl_cert_is_disabled(s->ctx, idx))
b8858aec 2374 pvalid[idx] = CERT_PKEY_EXPLICIT_SIGN | CERT_PKEY_SIGN;
0f113f3e
MC		 2375 }
2376 return 1;
2377}
4817504d 2378
e7f8ff43 2379int SSL_get_sigalgs(SSL *s, int idx,
0f113f3e
MC		 2380 int *psign, int *phash, int *psignhash,
2381 unsigned char *rsig, unsigned char *rhash)
2382{
555cbb32
TS		 2383 uint16_t *psig = s->s3.tmp.peer_sigalgs;
2384 size_t numsigalgs = s->s3.tmp.peer_sigalgslen;
348240c6 2385 if (psig == NULL || numsigalgs > INT_MAX)
0f113f3e
MC		 2386 return 0;
2387 if (idx >= 0) {
4d43ee28
DSH		 2388 const SIGALG_LOOKUP *lu;
2389
703bcee0 2390 if (idx >= (int)numsigalgs)
0f113f3e
MC		 2391 return 0;
2392 psig += idx;
4d43ee28 2393 if (rhash != NULL)
536199ec 2394 *rhash = (unsigned char)((*psig >> 8) & 0xff);
4d43ee28 2395 if (rsig != NULL)
536199ec 2396 *rsig = (unsigned char)(*psig & 0xff);
263ff2c9 2397 lu = tls1_lookup_sigalg(s, *psig);
4d43ee28
DSH		 2398 if (psign != NULL)
2399 *psign = lu != NULL ? lu->sig : NID_undef;
2400 if (phash != NULL)
2401 *phash = lu != NULL ? lu->hash : NID_undef;
2402 if (psignhash != NULL)
2403 *psignhash = lu != NULL ? lu->sigandhash : NID_undef;
0f113f3e 2404 }
348240c6 2405 return (int)numsigalgs;
0f113f3e 2406}
4453cd8c
DSH		 2407
2408int SSL_get_shared_sigalgs(SSL *s, int idx,
0f113f3e
MC		 2409 int *psign, int *phash, int *psignhash,
2410 unsigned char *rsig, unsigned char *rhash)
2411{
4d43ee28 2412 const SIGALG_LOOKUP *shsigalgs;
29948ac8 2413 if (s->shared_sigalgs == NULL
6d047e06 2414 || idx < 0
29948ac8
BK		 2415 || idx >= (int)s->shared_sigalgslen
2416 || s->shared_sigalgslen > INT_MAX)
0f113f3e 2417 return 0;
29948ac8 2418 shsigalgs = s->shared_sigalgs[idx];
4d43ee28
DSH		 2419 if (phash != NULL)
2420 *phash = shsigalgs->hash;
2421 if (psign != NULL)
2422 *psign = shsigalgs->sig;
2423 if (psignhash != NULL)
2424 *psignhash = shsigalgs->sigandhash;
2425 if (rsig != NULL)
2426 *rsig = (unsigned char)(shsigalgs->sigalg & 0xff);
2427 if (rhash != NULL)
2428 *rhash = (unsigned char)((shsigalgs->sigalg >> 8) & 0xff);
29948ac8 2429 return (int)s->shared_sigalgslen;
0f113f3e
MC		 2430}
2431
787ebcaf
DSH		 2432/* Maximum possible number of unique entries in sigalgs array */
2433#define TLS_MAX_SIGALGCNT (OSSL_NELEM(sigalg_lookup_tbl) * 2)
0f229cce 2434
0f113f3e
MC		 2435typedef struct {
2436 size_t sigalgcnt;
fd5e1a8c
BK		 2437 /* TLSEXT_SIGALG_XXX values */
2438 uint16_t sigalgs[TLS_MAX_SIGALGCNT];
0f113f3e 2439} sig_cb_st;
0f229cce 2440
431f458d
DSH		 2441static void get_sigorhash(int *psig, int *phash, const char *str)
2442{
2443 if (strcmp(str, "RSA") == 0) {
2444 *psig = EVP_PKEY_RSA;
b2eb6998
DSH		 2445 } else if (strcmp(str, "RSA-PSS") == 0 || strcmp(str, "PSS") == 0) {
2446 *psig = EVP_PKEY_RSA_PSS;
431f458d
DSH		 2447 } else if (strcmp(str, "DSA") == 0) {
2448 *psig = EVP_PKEY_DSA;
2449 } else if (strcmp(str, "ECDSA") == 0) {
2450 *psig = EVP_PKEY_EC;
2451 } else {
2452 *phash = OBJ_sn2nid(str);
2453 if (*phash == NID_undef)
2454 *phash = OBJ_ln2nid(str);
2455 }
2456}
787ebcaf
DSH		 2457/* Maximum length of a signature algorithm string component */
2458#define TLS_MAX_SIGSTRING_LEN 40
431f458d 2459
0f229cce 2460static int sig_cb(const char *elem, int len, void *arg)
0f113f3e
MC		 2461{
2462 sig_cb_st *sarg = arg;
2463 size_t i;
fd5e1a8c 2464 const SIGALG_LOOKUP *s;
787ebcaf 2465 char etmp[TLS_MAX_SIGSTRING_LEN], *p;
431f458d 2466 int sig_alg = NID_undef, hash_alg = NID_undef;
2747d73c
KR		 2467 if (elem == NULL)
2468 return 0;
787ebcaf 2469 if (sarg->sigalgcnt == TLS_MAX_SIGALGCNT)
0f113f3e
MC		 2470 return 0;
2471 if (len > (int)(sizeof(etmp) - 1))
2472 return 0;
2473 memcpy(etmp, elem, len);
2474 etmp[len] = 0;
2475 p = strchr(etmp, '+');
fd5e1a8c
BK		 2476 /*
2477 * We only allow SignatureSchemes listed in the sigalg_lookup_tbl;
2478 * if there's no '+' in the provided name, look for the new-style combined
2479 * name. If not, match both sig+hash to find the needed SIGALG_LOOKUP.
2480 * Just sig+hash is not unique since TLS 1.3 adds rsa_pss_pss_* and
2481 * rsa_pss_rsae_* that differ only by public key OID; in such cases
2482 * we will pick the _rsae_ variant, by virtue of them appearing earlier
2483 * in the table.
2484 */
8a43a42a 2485 if (p == NULL) {
8a43a42a
DSH		 2486 for (i = 0, s = sigalg_lookup_tbl; i < OSSL_NELEM(sigalg_lookup_tbl);
2487 i++, s++) {
2488 if (s->name != NULL && strcmp(etmp, s->name) == 0) {
fd5e1a8c 2489 sarg->sigalgs[sarg->sigalgcnt++] = s->sigalg;
8a43a42a
DSH		 2490 break;
2491 }
2492 }
fd5e1a8c
BK		 2493 if (i == OSSL_NELEM(sigalg_lookup_tbl))
2494 return 0;
8a43a42a
DSH		 2495 } else {
2496 *p = 0;
2497 p++;
2498 if (*p == 0)
2499 return 0;
2500 get_sigorhash(&sig_alg, &hash_alg, etmp);
2501 get_sigorhash(&sig_alg, &hash_alg, p);
fd5e1a8c
BK		 2502 if (sig_alg == NID_undef || hash_alg == NID_undef)
2503 return 0;
2504 for (i = 0, s = sigalg_lookup_tbl; i < OSSL_NELEM(sigalg_lookup_tbl);
2505 i++, s++) {
2506 if (s->hash == hash_alg && s->sig == sig_alg) {
2507 sarg->sigalgs[sarg->sigalgcnt++] = s->sigalg;
2508 break;
2509 }
2510 }
2511 if (i == OSSL_NELEM(sigalg_lookup_tbl))
2512 return 0;
8a43a42a 2513 }
0f113f3e 2514
fd5e1a8c
BK		 2515 /* Reject duplicates */
2516 for (i = 0; i < sarg->sigalgcnt - 1; i++) {
c1acef92 2517 if (sarg->sigalgs[i] == sarg->sigalgs[sarg->sigalgcnt - 1]) {
fd5e1a8c 2518 sarg->sigalgcnt--;
0f113f3e 2519 return 0;
fd5e1a8c 2520 }
0f113f3e 2521 }
0f113f3e
MC		 2522 return 1;
2523}
2524
2525/*
9d22666e 2526 * Set supported signature algorithms based on a colon separated list of the
0f113f3e
MC		 2527 * form sig+hash e.g. RSA+SHA512:DSA+SHA512
2528 */
3dbc46df 2529int tls1_set_sigalgs_list(CERT *c, const char *str, int client)
0f113f3e
MC		 2530{
2531 sig_cb_st sig;
2532 sig.sigalgcnt = 0;
2533 if (!CONF_parse_list(str, ':', 1, sig_cb, &sig))
2534 return 0;
2535 if (c == NULL)
2536 return 1;
fd5e1a8c
BK		 2537 return tls1_set_raw_sigalgs(c, sig.sigalgs, sig.sigalgcnt, client);
2538}
2539
2540int tls1_set_raw_sigalgs(CERT *c, const uint16_t *psigs, size_t salglen,
2541 int client)
2542{
2543 uint16_t *sigalgs;
2544
cdb10bae 2545 if ((sigalgs = OPENSSL_malloc(salglen * sizeof(*sigalgs))) == NULL) {
6849b73c 2546 ERR_raise(ERR_LIB_SSL, ERR_R_MALLOC_FAILURE);
fd5e1a8c 2547 return 0;
cdb10bae 2548 }
fd5e1a8c
BK		 2549 memcpy(sigalgs, psigs, salglen * sizeof(*sigalgs));
2550
2551 if (client) {
2552 OPENSSL_free(c->client_sigalgs);
2553 c->client_sigalgs = sigalgs;
2554 c->client_sigalgslen = salglen;
2555 } else {
2556 OPENSSL_free(c->conf_sigalgs);
2557 c->conf_sigalgs = sigalgs;
2558 c->conf_sigalgslen = salglen;
2559 }
2560
2561 return 1;
0f113f3e
MC		 2562}
2563
a230b26e 2564int tls1_set_sigalgs(CERT *c, const int *psig_nids, size_t salglen, int client)
0f113f3e 2565{
98c792d1 2566 uint16_t *sigalgs, *sptr;
0f113f3e 2567 size_t i;
63c1df09 2568
0f113f3e
MC		 2569 if (salglen & 1)
2570 return 0;
cdb10bae 2571 if ((sigalgs = OPENSSL_malloc((salglen / 2) * sizeof(*sigalgs))) == NULL) {
6849b73c 2572 ERR_raise(ERR_LIB_SSL, ERR_R_MALLOC_FAILURE);
0f113f3e 2573 return 0;
cdb10bae 2574 }
0f113f3e 2575 for (i = 0, sptr = sigalgs; i < salglen; i += 2) {
63c1df09 2576 size_t j;
7a531ee4 2577 const SIGALG_LOOKUP *curr;
63c1df09
MC		 2578 int md_id = *psig_nids++;
2579 int sig_id = *psig_nids++;
2580
2581 for (j = 0, curr = sigalg_lookup_tbl; j < OSSL_NELEM(sigalg_lookup_tbl);
2582 j++, curr++) {
fe3066ee 2583 if (curr->hash == md_id && curr->sig == sig_id) {
63c1df09
MC		 2584 *sptr++ = curr->sigalg;
2585 break;
2586 }
2587 }
0f113f3e 2588
63c1df09 2589 if (j == OSSL_NELEM(sigalg_lookup_tbl))
0f113f3e 2590 goto err;
0f113f3e
MC		 2591 }
2592
2593 if (client) {
b548a1f1 2594 OPENSSL_free(c->client_sigalgs);
0f113f3e 2595 c->client_sigalgs = sigalgs;
7a531ee4 2596 c->client_sigalgslen = salglen / 2;
0f113f3e 2597 } else {
b548a1f1 2598 OPENSSL_free(c->conf_sigalgs);
0f113f3e 2599 c->conf_sigalgs = sigalgs;
7a531ee4 2600 c->conf_sigalgslen = salglen / 2;
0f113f3e
MC		 2601 }
2602
2603 return 1;
2604
2605 err:
2606 OPENSSL_free(sigalgs);
2607 return 0;
2608}
4453cd8c 2609
29948ac8 2610static int tls1_check_sig_alg(SSL *s, X509 *x, int default_nid)
0f113f3e 2611{
5235ef44 2612 int sig_nid, use_pc_sigalgs = 0;
0f113f3e 2613 size_t i;
5235ef44
MC		 2614 const SIGALG_LOOKUP *sigalg;
2615 size_t sigalgslen;
0f113f3e
MC		 2616 if (default_nid == -1)
2617 return 1;
2618 sig_nid = X509_get_signature_nid(x);
2619 if (default_nid)
2620 return sig_nid == default_nid ? 1 : 0;
5235ef44
MC		 2621
2622 if (SSL_IS_TLS13(s) && s->s3.tmp.peer_cert_sigalgs != NULL) {
2623 /*
2624 * If we're in TLSv1.3 then we only get here if we're checking the
2625 * chain. If the peer has specified peer_cert_sigalgs then we use them
2626 * otherwise we default to normal sigalgs.
2627 */
2628 sigalgslen = s->s3.tmp.peer_cert_sigalgslen;
2629 use_pc_sigalgs = 1;
2630 } else {
2631 sigalgslen = s->shared_sigalgslen;
2632 }
2633 for (i = 0; i < sigalgslen; i++) {
2634 sigalg = use_pc_sigalgs
263ff2c9 2635 ? tls1_lookup_sigalg(s, s->s3.tmp.peer_cert_sigalgs[i])
5235ef44 2636 : s->shared_sigalgs[i];
a87f3fe0 2637 if (sigalg != NULL && sig_nid == sigalg->sigandhash)
0f113f3e 2638 return 1;
5235ef44 2639 }
0f113f3e
MC		 2640 return 0;
2641}
2642
6dbb6219
DSH		 2643/* Check to see if a certificate issuer name matches list of CA names */
2644static int ssl_check_ca_name(STACK_OF(X509_NAME) *names, X509 *x)
0f113f3e 2645{
8cc86b81 2646 const X509_NAME *nm;
0f113f3e
MC		 2647 int i;
2648 nm = X509_get_issuer_name(x);
2649 for (i = 0; i < sk_X509_NAME_num(names); i++) {
2650 if (!X509_NAME_cmp(nm, sk_X509_NAME_value(names, i)))
2651 return 1;
2652 }
2653 return 0;
2654}
2655
2656/*
2657 * Check certificate chain is consistent with TLS extensions and is usable by
2658 * server. This servers two purposes: it allows users to check chains before
2659 * passing them to the server and it allows the server to check chains before
2660 * attempting to use them.
d61ff83b 2661 */
6dbb6219 2662
69687aa8 2663/* Flags which need to be set for a certificate when strict mode not set */
6dbb6219 2664
e481f9b9 2665#define CERT_PKEY_VALID_FLAGS \
0f113f3e 2666 (CERT_PKEY_EE_SIGNATURE|CERT_PKEY_EE_PARAM)
6dbb6219 2667/* Strict mode flags */
e481f9b9 2668#define CERT_PKEY_STRICT_FLAGS \
0f113f3e
MC		 2669 (CERT_PKEY_VALID_FLAGS|CERT_PKEY_CA_SIGNATURE|CERT_PKEY_CA_PARAM \
2670 | CERT_PKEY_ISSUER_NAME|CERT_PKEY_CERT_TYPE)
6dbb6219 2671
d61ff83b 2672int tls1_check_chain(SSL *s, X509 *x, EVP_PKEY *pk, STACK_OF(X509) *chain,
0f113f3e
MC		 2673 int idx)
2674{
2675 int i;
2676 int rv = 0;
2677 int check_flags = 0, strict_mode;
2678 CERT_PKEY *cpk = NULL;
2679 CERT *c = s->cert;
f7d53487 2680 uint32_t *pvalid;
0f113f3e
MC		 2681 unsigned int suiteb_flags = tls1_suiteb(s);
2682 /* idx == -1 means checking server chains */
2683 if (idx != -1) {
2684 /* idx == -2 means checking client certificate chains */
2685 if (idx == -2) {
2686 cpk = c->key;
348240c6 2687 idx = (int)(cpk - c->pkeys);
0f113f3e
MC		 2688 } else
2689 cpk = c->pkeys + idx;
555cbb32 2690 pvalid = s->s3.tmp.valid_flags + idx;
0f113f3e
MC		 2691 x = cpk->x509;
2692 pk = cpk->privatekey;
2693 chain = cpk->chain;
2694 strict_mode = c->cert_flags & SSL_CERT_FLAGS_CHECK_TLS_STRICT;
2695 /* If no cert or key, forget it */
2696 if (!x || !pk)
2697 goto end;
0f113f3e 2698 } else {
52fd27f9
DSH		 2699 size_t certidx;
2700
0f113f3e 2701 if (!x || !pk)
d813f9eb 2702 return 0;
52fd27f9
DSH		 2703
2704 if (ssl_cert_lookup_by_pkey(pk, &certidx) == NULL)
d813f9eb 2705 return 0;
52fd27f9 2706 idx = certidx;
555cbb32 2707 pvalid = s->s3.tmp.valid_flags + idx;
6383d316 2708
0f113f3e
MC		 2709 if (c->cert_flags & SSL_CERT_FLAGS_CHECK_TLS_STRICT)
2710 check_flags = CERT_PKEY_STRICT_FLAGS;
2711 else
2712 check_flags = CERT_PKEY_VALID_FLAGS;
2713 strict_mode = 1;
2714 }
2715
2716 if (suiteb_flags) {
2717 int ok;
2718 if (check_flags)
2719 check_flags |= CERT_PKEY_SUITEB;
2720 ok = X509_chain_check_suiteb(NULL, x, chain, suiteb_flags);
2721 if (ok == X509_V_OK)
2722 rv |= CERT_PKEY_SUITEB;
2723 else if (!check_flags)
2724 goto end;
2725 }
2726
2727 /*
2728 * Check all signature algorithms are consistent with signature
2729 * algorithms extension if TLS 1.2 or later and strict mode.
2730 */
2731 if (TLS1_get_version(s) >= TLS1_2_VERSION && strict_mode) {
2732 int default_nid;
536199ec 2733 int rsign = 0;
555cbb32
TS		 2734 if (s->s3.tmp.peer_cert_sigalgs != NULL
2735 || s->s3.tmp.peer_sigalgs != NULL) {
0f113f3e
MC		 2736 default_nid = 0;
2737 /* If no sigalgs extension use defaults from RFC5246 */
c589c34e 2738 } else {
0f113f3e 2739 switch (idx) {
d0ff28f8 2740 case SSL_PKEY_RSA:
536199ec 2741 rsign = EVP_PKEY_RSA;
0f113f3e
MC		 2742 default_nid = NID_sha1WithRSAEncryption;
2743 break;
2744
2745 case SSL_PKEY_DSA_SIGN:
536199ec 2746 rsign = EVP_PKEY_DSA;
0f113f3e
MC		 2747 default_nid = NID_dsaWithSHA1;
2748 break;
2749
2750 case SSL_PKEY_ECC:
536199ec 2751 rsign = EVP_PKEY_EC;
0f113f3e
MC		 2752 default_nid = NID_ecdsa_with_SHA1;
2753 break;
2754
e44380a9 2755 case SSL_PKEY_GOST01:
536199ec 2756 rsign = NID_id_GostR3410_2001;
e44380a9
DB		 2757 default_nid = NID_id_GostR3411_94_with_GostR3410_2001;
2758 break;
2759
2760 case SSL_PKEY_GOST12_256:
536199ec 2761 rsign = NID_id_GostR3410_2012_256;
e44380a9
DB		 2762 default_nid = NID_id_tc26_signwithdigest_gost3410_2012_256;
2763 break;
2764
2765 case SSL_PKEY_GOST12_512:
536199ec 2766 rsign = NID_id_GostR3410_2012_512;
e44380a9
DB		 2767 default_nid = NID_id_tc26_signwithdigest_gost3410_2012_512;
2768 break;
2769
0f113f3e
MC		 2770 default:
2771 default_nid = -1;
2772 break;
2773 }
2774 }
2775 /*
2776 * If peer sent no signature algorithms extension and we have set
2777 * preferred signature algorithms check we support sha1.
2778 */
2779 if (default_nid > 0 && c->conf_sigalgs) {
2780 size_t j;
98c792d1 2781 const uint16_t *p = c->conf_sigalgs;
703bcee0 2782 for (j = 0; j < c->conf_sigalgslen; j++, p++) {
263ff2c9 2783 const SIGALG_LOOKUP *lu = tls1_lookup_sigalg(s, *p);
44b6318f
DSH		 2784
2785 if (lu != NULL && lu->hash == NID_sha1 && lu->sig == rsign)
0f113f3e
MC		 2786 break;
2787 }
2788 if (j == c->conf_sigalgslen) {
2789 if (check_flags)
2790 goto skip_sigs;
2791 else
2792 goto end;
2793 }
2794 }
2795 /* Check signature algorithm of each cert in chain */
5235ef44
MC		 2796 if (SSL_IS_TLS13(s)) {
2797 /*
2798 * We only get here if the application has called SSL_check_chain(),
2799 * so check_flags is always set.
2800 */
2801 if (find_sig_alg(s, x, pk) != NULL)
2802 rv |= CERT_PKEY_EE_SIGNATURE;
2803 } else if (!tls1_check_sig_alg(s, x, default_nid)) {
0f113f3e
MC		 2804 if (!check_flags)
2805 goto end;
2806 } else
2807 rv |= CERT_PKEY_EE_SIGNATURE;
2808 rv |= CERT_PKEY_CA_SIGNATURE;
2809 for (i = 0; i < sk_X509_num(chain); i++) {
29948ac8 2810 if (!tls1_check_sig_alg(s, sk_X509_value(chain, i), default_nid)) {
0f113f3e
MC		 2811 if (check_flags) {
2812 rv &= ~CERT_PKEY_CA_SIGNATURE;
2813 break;
2814 } else
2815 goto end;
2816 }
2817 }
2818 }
2819 /* Else not TLS 1.2, so mark EE and CA signing algorithms OK */
2820 else if (check_flags)
2821 rv |= CERT_PKEY_EE_SIGNATURE | CERT_PKEY_CA_SIGNATURE;
2822 skip_sigs:
2823 /* Check cert parameters are consistent */
9195ddcd 2824 if (tls1_check_cert_param(s, x, 1))
0f113f3e
MC		 2825 rv |= CERT_PKEY_EE_PARAM;
2826 else if (!check_flags)
2827 goto end;
2828 if (!s->server)
2829 rv |= CERT_PKEY_CA_PARAM;
2830 /* In strict mode check rest of chain too */
2831 else if (strict_mode) {
2832 rv |= CERT_PKEY_CA_PARAM;
2833 for (i = 0; i < sk_X509_num(chain); i++) {
2834 X509 *ca = sk_X509_value(chain, i);
2835 if (!tls1_check_cert_param(s, ca, 0)) {
2836 if (check_flags) {
2837 rv &= ~CERT_PKEY_CA_PARAM;
2838 break;
2839 } else
2840 goto end;
2841 }
2842 }
2843 }
2844 if (!s->server && strict_mode) {
2845 STACK_OF(X509_NAME) *ca_dn;
2846 int check_type = 0;
c2041da8
RL		 2847
2848 if (EVP_PKEY_is_a(pk, "RSA"))
0f113f3e 2849 check_type = TLS_CT_RSA_SIGN;
c2041da8 2850 else if (EVP_PKEY_is_a(pk, "DSA"))
0f113f3e 2851 check_type = TLS_CT_DSS_SIGN;
c2041da8 2852 else if (EVP_PKEY_is_a(pk, "EC"))
0f113f3e 2853 check_type = TLS_CT_ECDSA_SIGN;
c2041da8 2854
0f113f3e 2855 if (check_type) {
555cbb32 2856 const uint8_t *ctypes = s->s3.tmp.ctype;
75c13e78
DSH		 2857 size_t j;
2858
555cbb32 2859 for (j = 0; j < s->s3.tmp.ctype_len; j++, ctypes++) {
75c13e78 2860 if (*ctypes == check_type) {
0f113f3e
MC		 2861 rv |= CERT_PKEY_CERT_TYPE;
2862 break;
2863 }
2864 }
2865 if (!(rv & CERT_PKEY_CERT_TYPE) && !check_flags)
2866 goto end;
75c13e78 2867 } else {
0f113f3e 2868 rv |= CERT_PKEY_CERT_TYPE;
75c13e78 2869 }
0f113f3e 2870
555cbb32 2871 ca_dn = s->s3.tmp.peer_ca_names;
0f113f3e 2872
89dd8543
TM		 2873 if (ca_dn == NULL
2874 || sk_X509_NAME_num(ca_dn) == 0
2875 || ssl_check_ca_name(ca_dn, x))
0f113f3e 2876 rv |= CERT_PKEY_ISSUER_NAME;
89dd8543 2877 else
0f113f3e
MC		 2878 for (i = 0; i < sk_X509_num(chain); i++) {
2879 X509 *xtmp = sk_X509_value(chain, i);
89dd8543 2880
0f113f3e
MC		 2881 if (ssl_check_ca_name(ca_dn, xtmp)) {
2882 rv |= CERT_PKEY_ISSUER_NAME;
2883 break;
2884 }
2885 }
89dd8543 2886
0f113f3e
MC		 2887 if (!check_flags && !(rv & CERT_PKEY_ISSUER_NAME))
2888 goto end;
2889 } else
2890 rv |= CERT_PKEY_ISSUER_NAME | CERT_PKEY_CERT_TYPE;
2891
2892 if (!check_flags || (rv & check_flags) == check_flags)
2893 rv |= CERT_PKEY_VALID;
2894
2895 end:
2896
a8bb912d
DSH		 2897 if (TLS1_get_version(s) >= TLS1_2_VERSION)
2898 rv |= *pvalid & (CERT_PKEY_EXPLICIT_SIGN | CERT_PKEY_SIGN);
2899 else
0f113f3e
MC		 2900 rv |= CERT_PKEY_SIGN | CERT_PKEY_EXPLICIT_SIGN;
2901
2902 /*
2903 * When checking a CERT_PKEY structure all flags are irrelevant if the
2904 * chain is invalid.
2905 */
2906 if (!check_flags) {
a8bb912d 2907 if (rv & CERT_PKEY_VALID) {
6383d316 2908 *pvalid = rv;
a8bb912d
DSH		 2909 } else {
2910 /* Preserve sign and explicit sign flag, clear rest */
2911 *pvalid &= CERT_PKEY_EXPLICIT_SIGN | CERT_PKEY_SIGN;
0f113f3e
MC		 2912 return 0;
2913 }
2914 }
2915 return rv;
2916}
d61ff83b
DSH		 2917
2918/* Set validity of certificates in an SSL structure */
2919void tls1_set_cert_validity(SSL *s)
0f113f3e 2920{
d0ff28f8 2921 tls1_check_chain(s, NULL, NULL, NULL, SSL_PKEY_RSA);
045d078a 2922 tls1_check_chain(s, NULL, NULL, NULL, SSL_PKEY_RSA_PSS_SIGN);
17dd65e6 2923 tls1_check_chain(s, NULL, NULL, NULL, SSL_PKEY_DSA_SIGN);
17dd65e6 2924 tls1_check_chain(s, NULL, NULL, NULL, SSL_PKEY_ECC);
e44380a9
DB		 2925 tls1_check_chain(s, NULL, NULL, NULL, SSL_PKEY_GOST01);
2926 tls1_check_chain(s, NULL, NULL, NULL, SSL_PKEY_GOST12_256);
2927 tls1_check_chain(s, NULL, NULL, NULL, SSL_PKEY_GOST12_512);
3d234c9e 2928 tls1_check_chain(s, NULL, NULL, NULL, SSL_PKEY_ED25519);
0e1d6ecf 2929 tls1_check_chain(s, NULL, NULL, NULL, SSL_PKEY_ED448);
0f113f3e
MC		 2930}
2931
69687aa8 2932/* User level utility function to check a chain is suitable */
18d71588 2933int SSL_check_chain(SSL *s, X509 *x, EVP_PKEY *pk, STACK_OF(X509) *chain)
0f113f3e
MC		 2934{
2935 return tls1_check_chain(s, x, pk, chain, -1);
2936}
d61ff83b 2937
091f6074 2938EVP_PKEY *ssl_get_auto_dh(SSL *s)
0f113f3e 2939{
091f6074
MC		 2940 EVP_PKEY *dhp = NULL;
2941 BIGNUM *p;
d7b5c648 2942 int dh_secbits = 80, sec_level_bits;
091f6074
MC		 2943 EVP_PKEY_CTX *pctx = NULL;
2944 OSSL_PARAM_BLD *tmpl = NULL;
2945 OSSL_PARAM *params = NULL;
2946
7646610b
HK		 2947 if (s->cert->dh_tmp_auto != 2) {
2948 if (s->s3.tmp.new_cipher->algorithm_auth & (SSL_aNULL | SSL_aPSK)) {
2949 if (s->s3.tmp.new_cipher->strength_bits == 256)
2950 dh_secbits = 128;
2951 else
2952 dh_secbits = 80;
2953 } else {
2954 if (s->s3.tmp.cert == NULL)
2955 return NULL;
ed576acd 2956 dh_secbits = EVP_PKEY_get_security_bits(s->s3.tmp.cert->privatekey);
7646610b 2957 }
0f113f3e
MC		 2958 }
2959
d7b5c648
P		 2960 /* Do not pick a prime that is too weak for the current security level */
2961 sec_level_bits = ssl_get_security_level_bits(s, NULL, NULL);
2962 if (dh_secbits < sec_level_bits)
2963 dh_secbits = sec_level_bits;
2964
7646610b
HK		 2965 if (dh_secbits >= 192)
2966 p = BN_get_rfc3526_prime_8192(NULL);
2967 else if (dh_secbits >= 152)
2968 p = BN_get_rfc3526_prime_4096(NULL);
2969 else if (dh_secbits >= 128)
2970 p = BN_get_rfc3526_prime_3072(NULL);
2971 else if (dh_secbits >= 112)
2972 p = BN_get_rfc3526_prime_2048(NULL);
2973 else
2974 p = BN_get_rfc2409_prime_1024(NULL);
091f6074
MC		 2975 if (p == NULL)
2976 goto err;
2977
2978 pctx = EVP_PKEY_CTX_new_from_name(s->ctx->libctx, "DH", s->ctx->propq);
2979 if (pctx == NULL
2db985b7 2980 || EVP_PKEY_fromdata_init(pctx) != 1)
091f6074
MC		 2981 goto err;
2982
2983 tmpl = OSSL_PARAM_BLD_new();
2984 if (tmpl == NULL
2985 || !OSSL_PARAM_BLD_push_BN(tmpl, OSSL_PKEY_PARAM_FFC_P, p)
2986 || !OSSL_PARAM_BLD_push_uint(tmpl, OSSL_PKEY_PARAM_FFC_G, 2))
2987 goto err;
2988
2989 params = OSSL_PARAM_BLD_to_param(tmpl);
2db985b7
SL		 2990 if (params == NULL
2991 || EVP_PKEY_fromdata(pctx, &dhp, EVP_PKEY_KEY_PARAMETERS, params) != 1)
091f6074
MC		 2992 goto err;
2993
2994err:
3f883c7c 2995 OSSL_PARAM_free(params);
091f6074
MC		 2996 OSSL_PARAM_BLD_free(tmpl);
2997 EVP_PKEY_CTX_free(pctx);
2998 BN_free(p);
7646610b 2999 return dhp;
0f113f3e 3000}
b362ccab
DSH		 3001
3002static int ssl_security_cert_key(SSL *s, SSL_CTX *ctx, X509 *x, int op)
0f113f3e 3003{
72245f34 3004 int secbits = -1;
8382fd3a 3005 EVP_PKEY *pkey = X509_get0_pubkey(x);
0f113f3e 3006 if (pkey) {
72245f34
DSH		 3007 /*
3008 * If no parameters this will return -1 and fail using the default
3009 * security callback for any non-zero security level. This will
3010 * reject keys which omit parameters but this only affects DSA and
3011 * omission of parameters is never (?) done in practice.
3012 */
ed576acd 3013 secbits = EVP_PKEY_get_security_bits(pkey);
72245f34 3014 }
0f113f3e
MC		 3015 if (s)
3016 return ssl_security(s, op, secbits, 0, x);
3017 else
3018 return ssl_ctx_security(ctx, op, secbits, 0, x);
3019}
b362ccab
DSH		 3020
3021static int ssl_security_cert_sig(SSL *s, SSL_CTX *ctx, X509 *x, int op)
0f113f3e
MC		 3022{
3023 /* Lookup signature algorithm digest */
65e89736 3024 int secbits, nid, pknid;
221c7b55
DSH		 3025 /* Don't check signature if self signed */
3026 if ((X509_get_extension_flags(x) & EXFLAG_SS) != 0)
3027 return 1;
65e89736
DSH		 3028 if (!X509_get_signature_info(x, &nid, &pknid, &secbits, NULL))
3029 secbits = -1;
3030 /* If digest NID not defined use signature NID */
3031 if (nid == NID_undef)
3032 nid = pknid;
0f113f3e 3033 if (s)
65e89736 3034 return ssl_security(s, op, secbits, nid, x);
0f113f3e 3035 else
65e89736 3036 return ssl_ctx_security(ctx, op, secbits, nid, x);
0f113f3e 3037}
b362ccab
DSH		 3038
3039int ssl_security_cert(SSL *s, SSL_CTX *ctx, X509 *x, int vfy, int is_ee)
0f113f3e
MC		 3040{
3041 if (vfy)
3042 vfy = SSL_SECOP_PEER;
3043 if (is_ee) {
3044 if (!ssl_security_cert_key(s, ctx, x, SSL_SECOP_EE_KEY | vfy))
3045 return SSL_R_EE_KEY_TOO_SMALL;
3046 } else {
3047 if (!ssl_security_cert_key(s, ctx, x, SSL_SECOP_CA_KEY | vfy))
3048 return SSL_R_CA_KEY_TOO_SMALL;
3049 }
3050 if (!ssl_security_cert_sig(s, ctx, x, SSL_SECOP_CA_MD | vfy))
3051 return SSL_R_CA_MD_TOO_WEAK;
3052 return 1;
3053}
3054
3055/*
69687aa8
F		 3056 * Check security of a chain, if |sk| includes the end entity certificate then
3057 * |x| is NULL. If |vfy| is 1 then we are verifying a peer chain and not sending
0f113f3e 3058 * one to the peer. Return values: 1 if ok otherwise error code to use
b362ccab
DSH		 3059 */
3060
3061int ssl_security_cert_chain(SSL *s, STACK_OF(X509) *sk, X509 *x, int vfy)
0f113f3e
MC		 3062{
3063 int rv, start_idx, i;
3064 if (x == NULL) {
3065 x = sk_X509_value(sk, 0);
dc0ef292
BE		 3066 if (x == NULL)
3067 return ERR_R_INTERNAL_ERROR;
0f113f3e
MC		 3068 start_idx = 1;
3069 } else
3070 start_idx = 0;
3071
3072 rv = ssl_security_cert(s, NULL, x, vfy, 1);
3073 if (rv != 1)
3074 return rv;
3075
3076 for (i = start_idx; i < sk_X509_num(sk); i++) {
3077 x = sk_X509_value(sk, i);
3078 rv = ssl_security_cert(s, NULL, x, vfy, 0);
3079 if (rv != 1)
3080 return rv;
3081 }
3082 return 1;
3083}
93a77f9e 3084
7f6b466b
DSH		 3085/*
3086 * For TLS 1.2 servers check if we have a certificate which can be used
b46867d7 3087 * with the signature algorithm "lu" and return index of certificate.
7f6b466b
DSH		 3088 */
3089
b46867d7 3090static int tls12_get_cert_sigalg_idx(const SSL *s, const SIGALG_LOOKUP *lu)
7f6b466b 3091{
b46867d7
DSH		 3092 int sig_idx = lu->sig_idx;
3093 const SSL_CERT_LOOKUP *clu = ssl_cert_lookup_by_idx(sig_idx);
7f6b466b
DSH		 3094
3095 /* If not recognised or not supported by cipher mask it is not suitable */
b8fef8ee 3096 if (clu == NULL
555cbb32 3097 || (clu->amask & s->s3.tmp.new_cipher->algorithm_auth) == 0
b8fef8ee 3098 || (clu->nid == EVP_PKEY_RSA_PSS
555cbb32 3099 && (s->s3.tmp.new_cipher->algorithm_mkey & SSL_kRSA) != 0))
b46867d7
DSH		 3100 return -1;
3101
555cbb32 3102 return s->s3.tmp.valid_flags[sig_idx] & CERT_PKEY_VALID ? sig_idx : -1;
7f6b466b
DSH		 3103}
3104
c589c34e 3105/*
5235ef44
MC		 3106 * Checks the given cert against signature_algorithm_cert restrictions sent by
3107 * the peer (if any) as well as whether the hash from the sigalg is usable with
3108 * the key.
3109 * Returns true if the cert is usable and false otherwise.
c589c34e 3110 */
5235ef44
MC		 3111static int check_cert_usable(SSL *s, const SIGALG_LOOKUP *sig, X509 *x,
3112 EVP_PKEY *pkey)
c589c34e
BK		 3113{
3114 const SIGALG_LOOKUP *lu;
ecbb2fca 3115 int mdnid, pknid, supported;
c589c34e 3116 size_t i;
e9fe0f7e 3117 const char *mdname = NULL;
c589c34e 3118
b5a27688 3119 /*
e9fe0f7e 3120 * If the given EVP_PKEY cannot support signing with this digest,
b5a27688
DW		 3121 * the answer is simply 'no'.
3122 */
e9fe0f7e
TM		 3123 if (sig->hash != NID_undef)
3124 mdname = OBJ_nid2sn(sig->hash);
3125 supported = EVP_PKEY_digestsign_supports_digest(pkey, s->ctx->libctx,
3126 mdname,
3127 s->ctx->propq);
3128 if (supported <= 0)
b5a27688
DW		 3129 return 0;
3130
3131 /*
3132 * The TLS 1.3 signature_algorithms_cert extension places restrictions
3133 * on the sigalg with which the certificate was signed (by its issuer).
3134 */
555cbb32 3135 if (s->s3.tmp.peer_cert_sigalgs != NULL) {
b5a27688
DW		 3136 if (!X509_get_signature_info(x, &mdnid, &pknid, NULL, NULL))
3137 return 0;
555cbb32 3138 for (i = 0; i < s->s3.tmp.peer_cert_sigalgslen; i++) {
263ff2c9 3139 lu = tls1_lookup_sigalg(s, s->s3.tmp.peer_cert_sigalgs[i]);
b5a27688 3140 if (lu == NULL)
c589c34e 3141 continue;
ecbb2fca 3142
5235ef44 3143 /*
407820c0 3144 * This does not differentiate between the
b5a27688
DW		 3145 * rsa_pss_pss_* and rsa_pss_rsae_* schemes since we do not
3146 * have a chain here that lets us look at the key OID in the
3147 * signing certificate.
5235ef44 3148 */
b5a27688
DW		 3149 if (mdnid == lu->hash && pknid == lu->sig)
3150 return 1;
c589c34e
BK		 3151 }
3152 return 0;
3153 }
b5a27688 3154
5235ef44 3155 /*
b5a27688
DW		 3156 * Without signat_algorithms_cert, any certificate for which we have
3157 * a viable public key is permitted.
5235ef44 3158 */
ecbb2fca 3159 return 1;
c589c34e
BK		 3160}
3161
5235ef44
MC		 3162/*
3163 * Returns true if |s| has a usable certificate configured for use
3164 * with signature scheme |sig|.
3165 * "Usable" includes a check for presence as well as applying
3166 * the signature_algorithm_cert restrictions sent by the peer (if any).
3167 * Returns false if no usable certificate is found.
3168 */
3169static int has_usable_cert(SSL *s, const SIGALG_LOOKUP *sig, int idx)
3170{
3171 /* TLS 1.2 callers can override sig->sig_idx, but not TLS 1.3 callers. */
3172 if (idx == -1)
3173 idx = sig->sig_idx;
3174 if (!ssl_has_cert(s, idx))
3175 return 0;
3176
3177 return check_cert_usable(s, sig, s->cert->pkeys[idx].x509,
3178 s->cert->pkeys[idx].privatekey);
3179}
3180
3181/*
3182 * Returns true if the supplied cert |x| and key |pkey| is usable with the
3183 * specified signature scheme |sig|, or false otherwise.
3184 */
3185static int is_cert_usable(SSL *s, const SIGALG_LOOKUP *sig, X509 *x,
3186 EVP_PKEY *pkey)
3187{
3188 size_t idx;
3189
3190 if (ssl_cert_lookup_by_pkey(pkey, &idx) == NULL)
3191 return 0;
3192
3193 /* Check the key is consistent with the sig alg */
3194 if ((int)idx != sig->sig_idx)
3195 return 0;
3196
3197 return check_cert_usable(s, sig, x, pkey);
3198}
3199
3200/*
3201 * Find a signature scheme that works with the supplied certificate |x| and key
3202 * |pkey|. |x| and |pkey| may be NULL in which case we additionally look at our
3203 * available certs/keys to find one that works.
3204 */
3205static const SIGALG_LOOKUP *find_sig_alg(SSL *s, X509 *x, EVP_PKEY *pkey)
3206{
3207 const SIGALG_LOOKUP *lu = NULL;
3208 size_t i;
5235ef44 3209 int curve = -1;
5235ef44
MC		 3210 EVP_PKEY *tmppkey;
3211
3212 /* Look for a shared sigalgs matching possible certificates */
3213 for (i = 0; i < s->shared_sigalgslen; i++) {
3214 lu = s->shared_sigalgs[i];
3215
3216 /* Skip SHA1, SHA224, DSA and RSA if not PSS */
3217 if (lu->hash == NID_sha1
3218 || lu->hash == NID_sha224
3219 || lu->sig == EVP_PKEY_DSA
3220 || lu->sig == EVP_PKEY_RSA)
3221 continue;
3222 /* Check that we have a cert, and signature_algorithms_cert */
c8f6c28a 3223 if (!tls1_lookup_md(s->ctx, lu, NULL))
5235ef44
MC		 3224 continue;
3225 if ((pkey == NULL && !has_usable_cert(s, lu, -1))
3226 || (pkey != NULL && !is_cert_usable(s, lu, x, pkey)))
3227 continue;
3228
3229 tmppkey = (pkey != NULL) ? pkey
3230 : s->cert->pkeys[lu->sig_idx].privatekey;
3231
3232 if (lu->sig == EVP_PKEY_EC) {
c2041da8 3233 if (curve == -1)
d8975dec 3234 curve = ssl_get_EC_curve_nid(tmppkey);
5235ef44
MC		 3235 if (lu->curve != NID_undef && curve != lu->curve)
3236 continue;
5235ef44
MC		 3237 } else if (lu->sig == EVP_PKEY_RSA_PSS) {
3238 /* validate that key is large enough for the signature algorithm */
c5f87134 3239 if (!rsa_pss_check_min_key_size(s->ctx, tmppkey, lu))
5235ef44
MC		 3240 continue;
3241 }
3242 break;
3243 }
3244
3245 if (i == s->shared_sigalgslen)
3246 return NULL;
3247
3248 return lu;
3249}
3250
93a77f9e
DSH		 3251/*
3252 * Choose an appropriate signature algorithm based on available certificates
717a265a
DSH		 3253 * Sets chosen certificate and signature algorithm.
3254 *
f63a17d6
MC		 3255 * For servers if we fail to find a required certificate it is a fatal error,
3256 * an appropriate error code is set and a TLS alert is sent.
717a265a 3257 *
f63a17d6 3258 * For clients fatalerrs is set to 0. If a certificate is not suitable it is not
717a265a
DSH		 3259 * a fatal error: we will either try another certificate or not present one
3260 * to the server. In this case no error is set.
93a77f9e 3261 */
f63a17d6 3262int tls_choose_sigalg(SSL *s, int fatalerrs)
93a77f9e 3263{
0972bc5c 3264 const SIGALG_LOOKUP *lu = NULL;
b46867d7 3265 int sig_idx = -1;
0972bc5c 3266
555cbb32
TS		 3267 s->s3.tmp.cert = NULL;
3268 s->s3.tmp.sigalg = NULL;
717a265a 3269
93a77f9e 3270 if (SSL_IS_TLS13(s)) {
5235ef44
MC		 3271 lu = find_sig_alg(s, NULL, NULL);
3272 if (lu == NULL) {
f63a17d6 3273 if (!fatalerrs)
717a265a 3274 return 1;
c48ffbcc 3275 SSLfatal(s, SSL_AD_HANDSHAKE_FAILURE,
f63a17d6 3276 SSL_R_NO_SUITABLE_SIGNATURE_ALGORITHM);
0972bc5c
DSH		 3277 return 0;
3278 }
3279 } else {
7f6b466b 3280 /* If ciphersuite doesn't require a cert nothing to do */
555cbb32 3281 if (!(s->s3.tmp.new_cipher->algorithm_auth & SSL_aCERT))
7f6b466b
DSH		 3282 return 1;
3283 if (!s->server && !ssl_has_cert(s, s->cert->key - s->cert->pkeys))
717a265a 3284 return 1;
0972bc5c
DSH		 3285
3286 if (SSL_USE_SIGALGS(s)) {
c589c34e 3287 size_t i;
555cbb32 3288 if (s->s3.tmp.peer_sigalgs != NULL) {
c2041da8 3289 int curve = -1;
599b586d
DSH		 3290
3291 /* For Suite B need to match signature algorithm to curve */
c2041da8 3292 if (tls1_suiteb(s))
d8975dec
RL		 3293 curve = ssl_get_EC_curve_nid(s->cert->pkeys[SSL_PKEY_ECC]
3294 .privatekey);
0972bc5c
DSH		 3295
3296 /*
3297 * Find highest preference signature algorithm matching
3298 * cert type
3299 */
29948ac8
BK		 3300 for (i = 0; i < s->shared_sigalgslen; i++) {
3301 lu = s->shared_sigalgs[i];
7f6b466b
DSH		 3302
3303 if (s->server) {
b46867d7 3304 if ((sig_idx = tls12_get_cert_sigalg_idx(s, lu)) == -1)
7f6b466b 3305 continue;
b46867d7
DSH		 3306 } else {
3307 int cc_idx = s->cert->key - s->cert->pkeys;
3308
3309 sig_idx = lu->sig_idx;
c589c34e
BK		 3310 if (cc_idx != sig_idx)
3311 continue;
b2021556 3312 }
c589c34e
BK		 3313 /* Check that we have a cert, and sig_algs_cert */
3314 if (!has_usable_cert(s, lu, sig_idx))
3315 continue;
0fe3db25
NR		 3316 if (lu->sig == EVP_PKEY_RSA_PSS) {
3317 /* validate that key is large enough for the signature algorithm */
bcec0b94 3318 EVP_PKEY *pkey = s->cert->pkeys[sig_idx].privatekey;
0fe3db25 3319
c5f87134 3320 if (!rsa_pss_check_min_key_size(s->ctx, pkey, lu))
0fe3db25
NR		 3321 continue;
3322 }
7f6b466b 3323 if (curve == -1 || lu->curve == curve)
0972bc5c
DSH		 3324 break;
3325 }
db30f432
DB		 3326#ifndef OPENSSL_NO_GOST
3327 /*
3328 * Some Windows-based implementations do not send GOST algorithms indication
3329 * in supported_algorithms extension, so when we have GOST-based ciphersuite,
3330 * we have to assume GOST support.
3331 */
3332 if (i == s->shared_sigalgslen && s->s3.tmp.new_cipher->algorithm_auth & (SSL_aGOST01 | SSL_aGOST12)) {
3333 if ((lu = tls1_get_legacy_sigalg(s, -1)) == NULL) {
3334 if (!fatalerrs)
3335 return 1;
3336 SSLfatal(s, SSL_AD_HANDSHAKE_FAILURE,
db30f432
DB		 3337 SSL_R_NO_SUITABLE_SIGNATURE_ALGORITHM);
3338 return 0;
3339 } else {
3340 i = 0;
3341 sig_idx = lu->sig_idx;
3342 }
3343 }
3344#endif
29948ac8 3345 if (i == s->shared_sigalgslen) {
f63a17d6 3346 if (!fatalerrs)
717a265a 3347 return 1;
b8fef8ee 3348 SSLfatal(s, SSL_AD_HANDSHAKE_FAILURE,
b8fef8ee 3349 SSL_R_NO_SUITABLE_SIGNATURE_ALGORITHM);
0972bc5c
DSH		 3350 return 0;
3351 }
3352 } else {
3353 /*
3354 * If we have no sigalg use defaults
3355 */
3356 const uint16_t *sent_sigs;
c589c34e 3357 size_t sent_sigslen;
0972bc5c 3358
7f6b466b 3359 if ((lu = tls1_get_legacy_sigalg(s, -1)) == NULL) {
f63a17d6 3360 if (!fatalerrs)
717a265a 3361 return 1;
b4f1b7b6 3362 SSLfatal(s, SSL_AD_HANDSHAKE_FAILURE,
a70535f8 3363 SSL_R_NO_SUITABLE_SIGNATURE_ALGORITHM);
0972bc5c
DSH		 3364 return 0;
3365 }
3366
3367 /* Check signature matches a type we sent */
3368 sent_sigslen = tls12_get_psigalgs(s, 1, &sent_sigs);
3369 for (i = 0; i < sent_sigslen; i++, sent_sigs++) {
c589c34e
BK		 3370 if (lu->sigalg == *sent_sigs
3371 && has_usable_cert(s, lu, lu->sig_idx))
0972bc5c
DSH		 3372 break;
3373 }
3374 if (i == sent_sigslen) {
f63a17d6 3375 if (!fatalerrs)
717a265a 3376 return 1;
b4f1b7b6 3377 SSLfatal(s, SSL_AD_HANDSHAKE_FAILURE,
f63a17d6 3378 SSL_R_WRONG_SIGNATURE_TYPE);
0972bc5c
DSH		 3379 return 0;
3380 }
3381 }
3382 } else {
7f6b466b 3383 if ((lu = tls1_get_legacy_sigalg(s, -1)) == NULL) {
f63a17d6 3384 if (!fatalerrs)
717a265a 3385 return 1;
c48ffbcc 3386 SSLfatal(s, SSL_AD_INTERNAL_ERROR,
a70535f8 3387 SSL_R_NO_SUITABLE_SIGNATURE_ALGORITHM);
0972bc5c
DSH		 3388 return 0;
3389 }
3390 }
93a77f9e 3391 }
b46867d7
DSH		 3392 if (sig_idx == -1)
3393 sig_idx = lu->sig_idx;
555cbb32
TS		 3394 s->s3.tmp.cert = &s->cert->pkeys[sig_idx];
3395 s->cert->key = s->s3.tmp.cert;
3396 s->s3.tmp.sigalg = lu;
93a77f9e
DSH		 3397 return 1;
3398}
cf72c757
F		 3399
3400int SSL_CTX_set_tlsext_max_fragment_length(SSL_CTX *ctx, uint8_t mode)
3401{
3402 if (mode != TLSEXT_max_fragment_length_DISABLED
3403 && !IS_MAX_FRAGMENT_LENGTH_EXT_VALID(mode)) {
6849b73c 3404 ERR_raise(ERR_LIB_SSL, SSL_R_SSL3_EXT_INVALID_MAX_FRAGMENT_LENGTH);
cf72c757
F		 3405 return 0;
3406 }
3407
3408 ctx->ext.max_fragment_len_mode = mode;
3409 return 1;
3410}
3411
3412int SSL_set_tlsext_max_fragment_length(SSL *ssl, uint8_t mode)
3413{
3414 if (mode != TLSEXT_max_fragment_length_DISABLED
3415 && !IS_MAX_FRAGMENT_LENGTH_EXT_VALID(mode)) {
6849b73c 3416 ERR_raise(ERR_LIB_SSL, SSL_R_SSL3_EXT_INVALID_MAX_FRAGMENT_LENGTH);
cf72c757
F		 3417 return 0;
3418 }
3419
3420 ssl->ext.max_fragment_len_mode = mode;
3421 return 1;
3422}
3423
3424uint8_t SSL_SESSION_get_max_fragment_length(const SSL_SESSION *session)
3425{
3426 return session->ext.max_fragment_len_mode;
3427}
a76ce286
P		 3428
3429/*
3430 * Helper functions for HMAC access with legacy support included.
3431 */
3432SSL_HMAC *ssl_hmac_new(const SSL_CTX *ctx)
3433{
3434 SSL_HMAC *ret = OPENSSL_zalloc(sizeof(*ret));
3435 EVP_MAC *mac = NULL;
3436
3437 if (ret == NULL)
3438 return NULL;
3439#ifndef OPENSSL_NO_DEPRECATED_3_0
3440 if (ctx->ext.ticket_key_evp_cb == NULL
3441 && ctx->ext.ticket_key_cb != NULL) {
301fcb28 3442 if (!ssl_hmac_old_new(ret))
a76ce286
P		 3443 goto err;
3444 return ret;
3445 }
3446#endif
7f80980f 3447 mac = EVP_MAC_fetch(ctx->libctx, "HMAC", ctx->propq);
865adf97 3448 if (mac == NULL || (ret->ctx = EVP_MAC_CTX_new(mac)) == NULL)
a76ce286
P		 3449 goto err;
3450 EVP_MAC_free(mac);
3451 return ret;
3452 err:
865adf97 3453 EVP_MAC_CTX_free(ret->ctx);
a76ce286
P		 3454 EVP_MAC_free(mac);
3455 OPENSSL_free(ret);
3456 return NULL;
3457}
3458
3459void ssl_hmac_free(SSL_HMAC *ctx)
3460{
3461 if (ctx != NULL) {
865adf97 3462 EVP_MAC_CTX_free(ctx->ctx);
a76ce286 3463#ifndef OPENSSL_NO_DEPRECATED_3_0
301fcb28 3464 ssl_hmac_old_free(ctx);
a76ce286
P		 3465#endif
3466 OPENSSL_free(ctx);
3467 }
3468}
3469
a76ce286
P		 3470EVP_MAC_CTX *ssl_hmac_get0_EVP_MAC_CTX(SSL_HMAC *ctx)
3471{
3472 return ctx->ctx;
3473}
3474
3475int ssl_hmac_init(SSL_HMAC *ctx, void *key, size_t len, char *md)
3476{
0edb8194 3477 OSSL_PARAM params[2], *p = params;
a76ce286
P		 3478
3479 if (ctx->ctx != NULL) {
3480 *p++ = OSSL_PARAM_construct_utf8_string(OSSL_MAC_PARAM_DIGEST, md, 0);
a76ce286 3481 *p = OSSL_PARAM_construct_end();
0edb8194 3482 if (EVP_MAC_init(ctx->ctx, key, len, params))
a76ce286
P		 3483 return 1;
3484 }
3485#ifndef OPENSSL_NO_DEPRECATED_3_0
3486 if (ctx->old_ctx != NULL)
301fcb28 3487 return ssl_hmac_old_init(ctx, key, len, md);
a76ce286
P		 3488#endif
3489 return 0;
3490}
3491
3492int ssl_hmac_update(SSL_HMAC *ctx, const unsigned char *data, size_t len)
3493{
3494 if (ctx->ctx != NULL)
3495 return EVP_MAC_update(ctx->ctx, data, len);
3496#ifndef OPENSSL_NO_DEPRECATED_3_0
3497 if (ctx->old_ctx != NULL)
301fcb28 3498 return ssl_hmac_old_update(ctx, data, len);
a76ce286
P		 3499#endif
3500 return 0;
3501}
3502
3503int ssl_hmac_final(SSL_HMAC *ctx, unsigned char *md, size_t *len,
3504 size_t max_size)
3505{
3506 if (ctx->ctx != NULL)
3507 return EVP_MAC_final(ctx->ctx, md, len, max_size);
3508#ifndef OPENSSL_NO_DEPRECATED_3_0
301fcb28
MC		 3509 if (ctx->old_ctx != NULL)
3510 return ssl_hmac_old_final(ctx, md, len);
a76ce286
P		 3511#endif
3512 return 0;
3513}
3514
3515size_t ssl_hmac_size(const SSL_HMAC *ctx)
3516{
3517 if (ctx->ctx != NULL)
90a2576b 3518 return EVP_MAC_CTX_get_mac_size(ctx->ctx);
a76ce286
P		 3519#ifndef OPENSSL_NO_DEPRECATED_3_0
3520 if (ctx->old_ctx != NULL)
301fcb28 3521 return ssl_hmac_old_size(ctx);
a76ce286
P		 3522#endif
3523 return 0;
3524}
3525
d8975dec
RL		 3526int ssl_get_EC_curve_nid(const EVP_PKEY *pkey)
3527{
3528 char gname[OSSL_MAX_NAME_SIZE];
3529
3530 if (EVP_PKEY_get_group_name(pkey, gname, sizeof(gname), NULL) > 0)
3531 return OBJ_txt2nid(gname);
3532
3533 return NID_undef;
3534}
d5530efa
TM		 3535
3536__owur int tls13_set_encoded_pub_key(EVP_PKEY *pkey,
3537 const unsigned char *enckey,
3538 size_t enckeylen)
3539{
3540 if (EVP_PKEY_is_a(pkey, "DH")) {
3541 int bits = EVP_PKEY_get_bits(pkey);
3542
3543 if (bits <= 0 || enckeylen != (size_t)bits / 8)
3544 /* the encoded key must be padded to the length of the p */
3545 return 0;
3546 } else if (EVP_PKEY_is_a(pkey, "EC")) {
3547 if (enckeylen < 3 /* point format and at least 1 byte for x and y */
3548 || enckey[0] != 0x04)
3549 return 0;
3550 }
3551
3552 return EVP_PKEY_set1_encoded_public_key(pkey, enckey, enckeylen);
3553}
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