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SSL_set1_groups_list(): Fix memory corruption with 40 groups and more
[thirdparty/openssl.git] / ssl / t1_lib.c
CommitLineData
846e33c7 1/*
3c95ef22 2 * Copyright 1995-2023 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"
d6e7ebba 27#include "quic/quic_local.h"
3c27208f 28#include <openssl/ct.h>
58964a49 29
38b051a1
TM		 30static const SIGALG_LOOKUP *find_sig_alg(SSL_CONNECTION *s, X509 *x, EVP_PKEY *pkey);
31static int tls12_sigalg_allowed(const SSL_CONNECTION *s, int op, const SIGALG_LOOKUP *lu);
5235ef44 32
0f113f3e 33SSL3_ENC_METHOD const TLSv1_enc_data = {
0f113f3e
MC		 34 tls1_setup_key_block,
35 tls1_generate_master_secret,
36 tls1_change_cipher_state,
37 tls1_final_finish_mac,
0f113f3e
MC		 38 TLS_MD_CLIENT_FINISH_CONST, TLS_MD_CLIENT_FINISH_CONST_SIZE,
39 TLS_MD_SERVER_FINISH_CONST, TLS_MD_SERVER_FINISH_CONST_SIZE,
40 tls1_alert_code,
41 tls1_export_keying_material,
42 0,
a29fa98c 43 ssl3_set_handshake_header,
2c7b4dbc 44 tls_close_construct_packet,
0f113f3e
MC		 45 ssl3_handshake_write
46};
47
48SSL3_ENC_METHOD const TLSv1_1_enc_data = {
0f113f3e
MC		 49 tls1_setup_key_block,
50 tls1_generate_master_secret,
51 tls1_change_cipher_state,
52 tls1_final_finish_mac,
0f113f3e
MC		 53 TLS_MD_CLIENT_FINISH_CONST, TLS_MD_CLIENT_FINISH_CONST_SIZE,
54 TLS_MD_SERVER_FINISH_CONST, TLS_MD_SERVER_FINISH_CONST_SIZE,
55 tls1_alert_code,
56 tls1_export_keying_material,
57 SSL_ENC_FLAG_EXPLICIT_IV,
a29fa98c 58 ssl3_set_handshake_header,
2c7b4dbc 59 tls_close_construct_packet,
0f113f3e
MC		 60 ssl3_handshake_write
61};
62
63SSL3_ENC_METHOD const TLSv1_2_enc_data = {
0f113f3e
MC		 64 tls1_setup_key_block,
65 tls1_generate_master_secret,
66 tls1_change_cipher_state,
67 tls1_final_finish_mac,
0f113f3e
MC		 68 TLS_MD_CLIENT_FINISH_CONST, TLS_MD_CLIENT_FINISH_CONST_SIZE,
69 TLS_MD_SERVER_FINISH_CONST, TLS_MD_SERVER_FINISH_CONST_SIZE,
70 tls1_alert_code,
71 tls1_export_keying_material,
72 SSL_ENC_FLAG_EXPLICIT_IV | SSL_ENC_FLAG_SIGALGS | SSL_ENC_FLAG_SHA256_PRF
73 | SSL_ENC_FLAG_TLS1_2_CIPHERS,
a29fa98c 74 ssl3_set_handshake_header,
2c7b4dbc 75 tls_close_construct_packet,
0f113f3e
MC		 76 ssl3_handshake_write
77};
58964a49 78
582a17d6 79SSL3_ENC_METHOD const TLSv1_3_enc_data = {
92760c21
MC		 80 tls13_setup_key_block,
81 tls13_generate_master_secret,
82 tls13_change_cipher_state,
83 tls13_final_finish_mac,
582a17d6
MC		 84 TLS_MD_CLIENT_FINISH_CONST, TLS_MD_CLIENT_FINISH_CONST_SIZE,
85 TLS_MD_SERVER_FINISH_CONST, TLS_MD_SERVER_FINISH_CONST_SIZE,
04904312 86 tls13_alert_code,
0ca8d1ec 87 tls13_export_keying_material,
bebc0c7d 88 SSL_ENC_FLAG_SIGALGS | SSL_ENC_FLAG_SHA256_PRF,
582a17d6
MC		 89 ssl3_set_handshake_header,
90 tls_close_construct_packet,
91 ssl3_handshake_write
92};
93
f0131dc0 94OSSL_TIME tls1_default_timeout(void)
0f113f3e
MC		 95{
96 /*
97 * 2 hours, the 24 hours mentioned in the TLSv1 spec is way too long for
98 * http, the cache would over fill
99 */
f0131dc0 100 return ossl_seconds2time(60 * 60 * 2);
0f113f3e 101}
58964a49 102
6b691a5c 103int tls1_new(SSL *s)
0f113f3e
MC		 104{
105 if (!ssl3_new(s))
b77f3ed1
MC		 106 return 0;
107 if (!s->method->ssl_clear(s))
108 return 0;
109
110 return 1;
0f113f3e 111}
58964a49 112
6b691a5c 113void tls1_free(SSL *s)
0f113f3e 114{
38b051a1
TM		 115 SSL_CONNECTION *sc = SSL_CONNECTION_FROM_SSL(s);
116
117 if (sc == NULL)
118 return;
119
120 OPENSSL_free(sc->ext.session_ticket);
0f113f3e
MC		 121 ssl3_free(s);
122}
58964a49 123
b77f3ed1 124int tls1_clear(SSL *s)
0f113f3e 125{
38b051a1
TM		 126 SSL_CONNECTION *sc = SSL_CONNECTION_FROM_SSL(s);
127
128 if (sc == NULL)
129 return 0;
130
b77f3ed1
MC		 131 if (!ssl3_clear(s))
132 return 0;
133
4fa52141 134 if (s->method->version == TLS_ANY_VERSION)
38b051a1 135 sc->version = TLS_MAX_VERSION_INTERNAL;
4fa52141 136 else
38b051a1 137 sc->version = s->method->version;
b77f3ed1
MC		 138
139 return 1;
0f113f3e 140}
58964a49 141
9d2d857f 142/* Legacy NID to group_id mapping. Only works for groups we know about */
3392a569 143static const struct {
9d2d857f
MC		 144 int nid;
145 uint16_t group_id;
146} nid_to_group[] = {
48e971dd
MC		 147 {NID_sect163k1, OSSL_TLS_GROUP_ID_sect163k1},
148 {NID_sect163r1, OSSL_TLS_GROUP_ID_sect163r1},
149 {NID_sect163r2, OSSL_TLS_GROUP_ID_sect163r2},
150 {NID_sect193r1, OSSL_TLS_GROUP_ID_sect193r1},
151 {NID_sect193r2, OSSL_TLS_GROUP_ID_sect193r2},
152 {NID_sect233k1, OSSL_TLS_GROUP_ID_sect233k1},
153 {NID_sect233r1, OSSL_TLS_GROUP_ID_sect233r1},
154 {NID_sect239k1, OSSL_TLS_GROUP_ID_sect239k1},
155 {NID_sect283k1, OSSL_TLS_GROUP_ID_sect283k1},
156 {NID_sect283r1, OSSL_TLS_GROUP_ID_sect283r1},
157 {NID_sect409k1, OSSL_TLS_GROUP_ID_sect409k1},
158 {NID_sect409r1, OSSL_TLS_GROUP_ID_sect409r1},
159 {NID_sect571k1, OSSL_TLS_GROUP_ID_sect571k1},
160 {NID_sect571r1, OSSL_TLS_GROUP_ID_sect571r1},
161 {NID_secp160k1, OSSL_TLS_GROUP_ID_secp160k1},
162 {NID_secp160r1, OSSL_TLS_GROUP_ID_secp160r1},
163 {NID_secp160r2, OSSL_TLS_GROUP_ID_secp160r2},
164 {NID_secp192k1, OSSL_TLS_GROUP_ID_secp192k1},
165 {NID_X9_62_prime192v1, OSSL_TLS_GROUP_ID_secp192r1},
166 {NID_secp224k1, OSSL_TLS_GROUP_ID_secp224k1},
167 {NID_secp224r1, OSSL_TLS_GROUP_ID_secp224r1},
168 {NID_secp256k1, OSSL_TLS_GROUP_ID_secp256k1},
169 {NID_X9_62_prime256v1, OSSL_TLS_GROUP_ID_secp256r1},
170 {NID_secp384r1, OSSL_TLS_GROUP_ID_secp384r1},
171 {NID_secp521r1, OSSL_TLS_GROUP_ID_secp521r1},
172 {NID_brainpoolP256r1, OSSL_TLS_GROUP_ID_brainpoolP256r1},
173 {NID_brainpoolP384r1, OSSL_TLS_GROUP_ID_brainpoolP384r1},
174 {NID_brainpoolP512r1, OSSL_TLS_GROUP_ID_brainpoolP512r1},
175 {EVP_PKEY_X25519, OSSL_TLS_GROUP_ID_x25519},
176 {EVP_PKEY_X448, OSSL_TLS_GROUP_ID_x448},
c9ee6e36
MC		 177 {NID_brainpoolP256r1tls13, OSSL_TLS_GROUP_ID_brainpoolP256r1_tls13},
178 {NID_brainpoolP384r1tls13, OSSL_TLS_GROUP_ID_brainpoolP384r1_tls13},
179 {NID_brainpoolP512r1tls13, OSSL_TLS_GROUP_ID_brainpoolP512r1_tls13},
0a10825a
BE		 180 {NID_id_tc26_gost_3410_2012_256_paramSetA, OSSL_TLS_GROUP_ID_gc256A},
181 {NID_id_tc26_gost_3410_2012_256_paramSetB, OSSL_TLS_GROUP_ID_gc256B},
182 {NID_id_tc26_gost_3410_2012_256_paramSetC, OSSL_TLS_GROUP_ID_gc256C},
183 {NID_id_tc26_gost_3410_2012_256_paramSetD, OSSL_TLS_GROUP_ID_gc256D},
184 {NID_id_tc26_gost_3410_2012_512_paramSetA, OSSL_TLS_GROUP_ID_gc512A},
185 {NID_id_tc26_gost_3410_2012_512_paramSetB, OSSL_TLS_GROUP_ID_gc512B},
186 {NID_id_tc26_gost_3410_2012_512_paramSetC, OSSL_TLS_GROUP_ID_gc512C},
48e971dd
MC		 187 {NID_ffdhe2048, OSSL_TLS_GROUP_ID_ffdhe2048},
188 {NID_ffdhe3072, OSSL_TLS_GROUP_ID_ffdhe3072},
189 {NID_ffdhe4096, OSSL_TLS_GROUP_ID_ffdhe4096},
190 {NID_ffdhe6144, OSSL_TLS_GROUP_ID_ffdhe6144},
191 {NID_ffdhe8192, OSSL_TLS_GROUP_ID_ffdhe8192}
0f113f3e
MC		 192};
193
194static const unsigned char ecformats_default[] = {
195 TLSEXT_ECPOINTFORMAT_uncompressed,
196 TLSEXT_ECPOINTFORMAT_ansiX962_compressed_prime,
197 TLSEXT_ECPOINTFORMAT_ansiX962_compressed_char2
198};
199
fe6ef247 200/* The default curves */
9aaecbfc 201static const uint16_t supported_groups_default[] = {
0a10825a
BE		 202 OSSL_TLS_GROUP_ID_x25519, /* X25519 (29) */
203 OSSL_TLS_GROUP_ID_secp256r1, /* secp256r1 (23) */
204 OSSL_TLS_GROUP_ID_x448, /* X448 (30) */
205 OSSL_TLS_GROUP_ID_secp521r1, /* secp521r1 (25) */
206 OSSL_TLS_GROUP_ID_secp384r1, /* secp384r1 (24) */
207 OSSL_TLS_GROUP_ID_gc256A, /* GC256A (34) */
208 OSSL_TLS_GROUP_ID_gc256B, /* GC256B (35) */
209 OSSL_TLS_GROUP_ID_gc256C, /* GC256C (36) */
210 OSSL_TLS_GROUP_ID_gc256D, /* GC256D (37) */
211 OSSL_TLS_GROUP_ID_gc512A, /* GC512A (38) */
212 OSSL_TLS_GROUP_ID_gc512B, /* GC512B (39) */
213 OSSL_TLS_GROUP_ID_gc512C, /* GC512C (40) */
214 OSSL_TLS_GROUP_ID_ffdhe2048, /* ffdhe2048 (0x100) */
215 OSSL_TLS_GROUP_ID_ffdhe3072, /* ffdhe3072 (0x101) */
216 OSSL_TLS_GROUP_ID_ffdhe4096, /* ffdhe4096 (0x102) */
217 OSSL_TLS_GROUP_ID_ffdhe6144, /* ffdhe6144 (0x103) */
218 OSSL_TLS_GROUP_ID_ffdhe8192, /* ffdhe8192 (0x104) */
de57d237
EK		 219};
220
9e84a42d 221static const uint16_t suiteb_curves[] = {
0a10825a
BE		 222 OSSL_TLS_GROUP_ID_secp256r1,
223 OSSL_TLS_GROUP_ID_secp384r1,
0f113f3e 224};
2ea80354 225
ee58915c 226struct provider_ctx_data_st {
9d2d857f
MC		 227 SSL_CTX *ctx;
228 OSSL_PROVIDER *provider;
229};
230
231#define TLS_GROUP_LIST_MALLOC_BLOCK_SIZE 10
232static OSSL_CALLBACK add_provider_groups;
233static int add_provider_groups(const OSSL_PARAM params[], void *data)
234{
ee58915c 235 struct provider_ctx_data_st *pgd = data;
9d2d857f
MC		 236 SSL_CTX *ctx = pgd->ctx;
237 OSSL_PROVIDER *provider = pgd->provider;
238 const OSSL_PARAM *p;
239 TLS_GROUP_INFO *ginf = NULL;
240 EVP_KEYMGMT *keymgmt;
241 unsigned int gid;
c1a74f59 242 unsigned int is_kem = 0;
9d2d857f
MC		 243 int ret = 0;
244
245 if (ctx->group_list_max_len == ctx->group_list_len) {
246 TLS_GROUP_INFO *tmp = NULL;
247
248 if (ctx->group_list_max_len == 0)
249 tmp = OPENSSL_malloc(sizeof(TLS_GROUP_INFO)
250 * TLS_GROUP_LIST_MALLOC_BLOCK_SIZE);
251 else
252 tmp = OPENSSL_realloc(ctx->group_list,
253 (ctx->group_list_max_len
254 + TLS_GROUP_LIST_MALLOC_BLOCK_SIZE)
255 * sizeof(TLS_GROUP_INFO));
e077455e 256 if (tmp == NULL)
9d2d857f 257 return 0;
9d2d857f
MC		 258 ctx->group_list = tmp;
259 memset(tmp + ctx->group_list_max_len,
260 0,
261 sizeof(TLS_GROUP_INFO) * TLS_GROUP_LIST_MALLOC_BLOCK_SIZE);
262 ctx->group_list_max_len += TLS_GROUP_LIST_MALLOC_BLOCK_SIZE;
263 }
264
265 ginf = &ctx->group_list[ctx->group_list_len];
266
267 p = OSSL_PARAM_locate_const(params, OSSL_CAPABILITY_TLS_GROUP_NAME);
268 if (p == NULL || p->data_type != OSSL_PARAM_UTF8_STRING) {
6849b73c 269 ERR_raise(ERR_LIB_SSL, ERR_R_PASSED_INVALID_ARGUMENT);
9d2d857f
MC		 270 goto err;
271 }
272 ginf->tlsname = OPENSSL_strdup(p->data);
e077455e 273 if (ginf->tlsname == NULL)
9d2d857f 274 goto err;
9d2d857f
MC		 275
276 p = OSSL_PARAM_locate_const(params, OSSL_CAPABILITY_TLS_GROUP_NAME_INTERNAL);
277 if (p == NULL || p->data_type != OSSL_PARAM_UTF8_STRING) {
6849b73c 278 ERR_raise(ERR_LIB_SSL, ERR_R_PASSED_INVALID_ARGUMENT);
9d2d857f
MC		 279 goto err;
280 }
281 ginf->realname = OPENSSL_strdup(p->data);
e077455e 282 if (ginf->realname == NULL)
9d2d857f 283 goto err;
9d2d857f
MC		 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);
e077455e 298 if (ginf->algorithm == NULL)
9d2d857f 299 goto err;
9d2d857f
MC		 300
301 p = OSSL_PARAM_locate_const(params, OSSL_CAPABILITY_TLS_GROUP_SECURITY_BITS);
302 if (p == NULL || !OSSL_PARAM_get_uint(p, &ginf->secbits)) {
6849b73c 303 ERR_raise(ERR_LIB_SSL, ERR_R_PASSED_INVALID_ARGUMENT);
9d2d857f
MC		 304 goto err;
305 }
306
c1a74f59
NT		 307 p = OSSL_PARAM_locate_const(params, OSSL_CAPABILITY_TLS_GROUP_IS_KEM);
308 if (p != NULL && (!OSSL_PARAM_get_uint(p, &is_kem) || is_kem > 1)) {
6849b73c 309 ERR_raise(ERR_LIB_SSL, ERR_R_PASSED_INVALID_ARGUMENT);
c1a74f59
NT		 310 goto err;
311 }
312 ginf->is_kem = 1 & is_kem;
313
9d2d857f
MC		 314 p = OSSL_PARAM_locate_const(params, OSSL_CAPABILITY_TLS_GROUP_MIN_TLS);
315 if (p == NULL || !OSSL_PARAM_get_int(p, &ginf->mintls)) {
6849b73c 316 ERR_raise(ERR_LIB_SSL, ERR_R_PASSED_INVALID_ARGUMENT);
9d2d857f
MC		 317 goto err;
318 }
319
320 p = OSSL_PARAM_locate_const(params, OSSL_CAPABILITY_TLS_GROUP_MAX_TLS);
321 if (p == NULL || !OSSL_PARAM_get_int(p, &ginf->maxtls)) {
6849b73c 322 ERR_raise(ERR_LIB_SSL, ERR_R_PASSED_INVALID_ARGUMENT);
90a74d8c 323 goto err;
9d2d857f
MC		 324 }
325
326 p = OSSL_PARAM_locate_const(params, OSSL_CAPABILITY_TLS_GROUP_MIN_DTLS);
327 if (p == NULL || !OSSL_PARAM_get_int(p, &ginf->mindtls)) {
6849b73c 328 ERR_raise(ERR_LIB_SSL, ERR_R_PASSED_INVALID_ARGUMENT);
9d2d857f
MC		 329 goto err;
330 }
331
332 p = OSSL_PARAM_locate_const(params, OSSL_CAPABILITY_TLS_GROUP_MAX_DTLS);
333 if (p == NULL || !OSSL_PARAM_get_int(p, &ginf->maxdtls)) {
6849b73c 334 ERR_raise(ERR_LIB_SSL, ERR_R_PASSED_INVALID_ARGUMENT);
9d2d857f
MC		 335 goto err;
336 }
337 /*
338 * Now check that the algorithm is actually usable for our property query
339 * string. Regardless of the result we still return success because we have
340 * successfully processed this group, even though we may decide not to use
341 * it.
342 */
343 ret = 1;
ce8822b7 344 ERR_set_mark();
9d2d857f
MC		 345 keymgmt = EVP_KEYMGMT_fetch(ctx->libctx, ginf->algorithm, ctx->propq);
346 if (keymgmt != NULL) {
347 /*
348 * We have successfully fetched the algorithm - however if the provider
349 * doesn't match this one then we ignore it.
350 *
351 * Note: We're cheating a little here. Technically if the same algorithm
352 * is available from more than one provider then it is undefined which
353 * implementation you will get back. Theoretically this could be
354 * different every time...we assume here that you'll always get the
355 * same one back if you repeat the exact same fetch. Is this a reasonable
356 * assumption to make (in which case perhaps we should document this
357 * behaviour)?
358 */
ed576acd 359 if (EVP_KEYMGMT_get0_provider(keymgmt) == provider) {
9d2d857f
MC		 360 /* We have a match - so we will use this group */
361 ctx->group_list_len++;
362 ginf = NULL;
363 }
364 EVP_KEYMGMT_free(keymgmt);
365 }
ce8822b7 366 ERR_pop_to_mark();
9d2d857f
MC		 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{
ee58915c 379 struct provider_ctx_data_st pgd;
9d2d857f
MC		 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
e077455e 410 if (ctx->ext.supported_groups_default == NULL)
ddf8f1ce 411 return 0;
ddf8f1ce 412
8b1db5d3
MC		 413 memcpy(ctx->ext.supported_groups_default,
414 tmp_supp_groups,
415 num_deflt_grps * sizeof(tmp_supp_groups[0]));
ddf8f1ce
MC		 416 ctx->ext.supported_groups_default_len = num_deflt_grps;
417
418 return 1;
9d2d857f
MC		 419}
420
ee58915c
MB		 421#define TLS_SIGALG_LIST_MALLOC_BLOCK_SIZE 10
422static OSSL_CALLBACK add_provider_sigalgs;
423static int add_provider_sigalgs(const OSSL_PARAM params[], void *data)
424{
425 struct provider_ctx_data_st *pgd = data;
426 SSL_CTX *ctx = pgd->ctx;
427 OSSL_PROVIDER *provider = pgd->provider;
428 const OSSL_PARAM *p;
429 TLS_SIGALG_INFO *sinf = NULL;
430 EVP_KEYMGMT *keymgmt;
431 const char *keytype;
432 unsigned int code_point = 0;
433 int ret = 0;
434
435 if (ctx->sigalg_list_max_len == ctx->sigalg_list_len) {
436 TLS_SIGALG_INFO *tmp = NULL;
437
438 if (ctx->sigalg_list_max_len == 0)
439 tmp = OPENSSL_malloc(sizeof(TLS_SIGALG_INFO)
440 * TLS_SIGALG_LIST_MALLOC_BLOCK_SIZE);
441 else
442 tmp = OPENSSL_realloc(ctx->sigalg_list,
443 (ctx->sigalg_list_max_len
444 + TLS_SIGALG_LIST_MALLOC_BLOCK_SIZE)
445 * sizeof(TLS_SIGALG_INFO));
446 if (tmp == NULL)
447 return 0;
448 ctx->sigalg_list = tmp;
449 memset(tmp + ctx->sigalg_list_max_len, 0,
450 sizeof(TLS_SIGALG_INFO) * TLS_SIGALG_LIST_MALLOC_BLOCK_SIZE);
451 ctx->sigalg_list_max_len += TLS_SIGALG_LIST_MALLOC_BLOCK_SIZE;
452 }
453
454 sinf = &ctx->sigalg_list[ctx->sigalg_list_len];
455
456 /* First, mandatory parameters */
457 p = OSSL_PARAM_locate_const(params, OSSL_CAPABILITY_TLS_SIGALG_NAME);
458 if (p == NULL || p->data_type != OSSL_PARAM_UTF8_STRING) {
459 ERR_raise(ERR_LIB_SSL, ERR_R_PASSED_INVALID_ARGUMENT);
460 goto err;
461 }
462 OPENSSL_free(sinf->sigalg_name);
463 sinf->sigalg_name = OPENSSL_strdup(p->data);
464 if (sinf->sigalg_name == NULL)
465 goto err;
466
467 p = OSSL_PARAM_locate_const(params, OSSL_CAPABILITY_TLS_SIGALG_IANA_NAME);
468 if (p == NULL || p->data_type != OSSL_PARAM_UTF8_STRING) {
469 ERR_raise(ERR_LIB_SSL, ERR_R_PASSED_INVALID_ARGUMENT);
470 goto err;
471 }
472 OPENSSL_free(sinf->name);
473 sinf->name = OPENSSL_strdup(p->data);
474 if (sinf->name == NULL)
475 goto err;
476
477 p = OSSL_PARAM_locate_const(params,
478 OSSL_CAPABILITY_TLS_SIGALG_CODE_POINT);
479 if (p == NULL
480 || !OSSL_PARAM_get_uint(p, &code_point)
481 || code_point > UINT16_MAX) {
482 ERR_raise(ERR_LIB_SSL, ERR_R_PASSED_INVALID_ARGUMENT);
483 goto err;
484 }
485 sinf->code_point = (uint16_t)code_point;
486
487 p = OSSL_PARAM_locate_const(params,
488 OSSL_CAPABILITY_TLS_SIGALG_SECURITY_BITS);
489 if (p == NULL || !OSSL_PARAM_get_uint(p, &sinf->secbits)) {
490 ERR_raise(ERR_LIB_SSL, ERR_R_PASSED_INVALID_ARGUMENT);
491 goto err;
492 }
493
494 /* Now, optional parameters */
495 p = OSSL_PARAM_locate_const(params, OSSL_CAPABILITY_TLS_SIGALG_OID);
496 if (p == NULL) {
497 sinf->sigalg_oid = NULL;
498 } else if (p->data_type != OSSL_PARAM_UTF8_STRING) {
499 goto err;
500 } else {
501 OPENSSL_free(sinf->sigalg_oid);
502 sinf->sigalg_oid = OPENSSL_strdup(p->data);
503 if (sinf->sigalg_oid == NULL)
504 goto err;
505 }
506
507 p = OSSL_PARAM_locate_const(params, OSSL_CAPABILITY_TLS_SIGALG_SIG_NAME);
508 if (p == NULL) {
509 sinf->sig_name = NULL;
510 } else if (p->data_type != OSSL_PARAM_UTF8_STRING) {
511 goto err;
512 } else {
513 OPENSSL_free(sinf->sig_name);
514 sinf->sig_name = OPENSSL_strdup(p->data);
515 if (sinf->sig_name == NULL)
516 goto err;
517 }
518
519 p = OSSL_PARAM_locate_const(params, OSSL_CAPABILITY_TLS_SIGALG_SIG_OID);
520 if (p == NULL) {
521 sinf->sig_oid = NULL;
522 } else if (p->data_type != OSSL_PARAM_UTF8_STRING) {
523 goto err;
524 } else {
525 OPENSSL_free(sinf->sig_oid);
526 sinf->sig_oid = OPENSSL_strdup(p->data);
527 if (sinf->sig_oid == NULL)
528 goto err;
529 }
530
531 p = OSSL_PARAM_locate_const(params, OSSL_CAPABILITY_TLS_SIGALG_HASH_NAME);
532 if (p == NULL) {
533 sinf->hash_name = NULL;
534 } else if (p->data_type != OSSL_PARAM_UTF8_STRING) {
535 goto err;
536 } else {
537 OPENSSL_free(sinf->hash_name);
538 sinf->hash_name = OPENSSL_strdup(p->data);
539 if (sinf->hash_name == NULL)
540 goto err;
541 }
542
543 p = OSSL_PARAM_locate_const(params, OSSL_CAPABILITY_TLS_SIGALG_HASH_OID);
544 if (p == NULL) {
545 sinf->hash_oid = NULL;
546 } else if (p->data_type != OSSL_PARAM_UTF8_STRING) {
547 goto err;
548 } else {
549 OPENSSL_free(sinf->hash_oid);
550 sinf->hash_oid = OPENSSL_strdup(p->data);
551 if (sinf->hash_oid == NULL)
552 goto err;
553 }
554
555 p = OSSL_PARAM_locate_const(params, OSSL_CAPABILITY_TLS_SIGALG_KEYTYPE);
556 if (p == NULL) {
557 sinf->keytype = NULL;
558 } else if (p->data_type != OSSL_PARAM_UTF8_STRING) {
559 goto err;
560 } else {
561 OPENSSL_free(sinf->keytype);
562 sinf->keytype = OPENSSL_strdup(p->data);
563 if (sinf->keytype == NULL)
564 goto err;
565 }
566
567 p = OSSL_PARAM_locate_const(params, OSSL_CAPABILITY_TLS_SIGALG_KEYTYPE_OID);
568 if (p == NULL) {
569 sinf->keytype_oid = NULL;
570 } else if (p->data_type != OSSL_PARAM_UTF8_STRING) {
571 goto err;
572 } else {
573 OPENSSL_free(sinf->keytype_oid);
574 sinf->keytype_oid = OPENSSL_strdup(p->data);
575 if (sinf->keytype_oid == NULL)
576 goto err;
577 }
578
579 /* The remaining parameters below are mandatory again */
580 p = OSSL_PARAM_locate_const(params, OSSL_CAPABILITY_TLS_SIGALG_MIN_TLS);
581 if (p == NULL || !OSSL_PARAM_get_int(p, &sinf->mintls)) {
582 ERR_raise(ERR_LIB_SSL, ERR_R_PASSED_INVALID_ARGUMENT);
583 goto err;
584 }
585 if ((sinf->mintls != 0) && (sinf->mintls != -1) &&
586 ((sinf->mintls < TLS1_3_VERSION))) {
587 /* ignore this sigalg as this OpenSSL doesn't know how to handle it */
588 ret = 1;
589 goto err;
590 }
591
592 p = OSSL_PARAM_locate_const(params, OSSL_CAPABILITY_TLS_SIGALG_MAX_TLS);
593 if (p == NULL || !OSSL_PARAM_get_int(p, &sinf->maxtls)) {
594 ERR_raise(ERR_LIB_SSL, ERR_R_PASSED_INVALID_ARGUMENT);
595 goto err;
596 }
597 if ((sinf->maxtls != 0) && (sinf->maxtls != -1) &&
598 ((sinf->maxtls < sinf->mintls))) {
599 ERR_raise(ERR_LIB_SSL, ERR_R_PASSED_INVALID_ARGUMENT);
600 goto err;
601 }
602 if ((sinf->maxtls != 0) && (sinf->maxtls != -1) &&
603 ((sinf->maxtls < TLS1_3_VERSION))) {
604 /* ignore this sigalg as this OpenSSL doesn't know how to handle it */
605 ret = 1;
606 goto err;
607 }
608
609 /*
610 * Now check that the algorithm is actually usable for our property query
611 * string. Regardless of the result we still return success because we have
612 * successfully processed this signature, even though we may decide not to
613 * use it.
614 */
615 ret = 1;
616 ERR_set_mark();
617 keytype = (sinf->keytype != NULL
618 ? sinf->keytype
619 : (sinf->sig_name != NULL
620 ? sinf->sig_name
621 : sinf->sigalg_name));
622 keymgmt = EVP_KEYMGMT_fetch(ctx->libctx, keytype, ctx->propq);
623 if (keymgmt != NULL) {
624 /*
625 * We have successfully fetched the algorithm - however if the provider
626 * doesn't match this one then we ignore it.
627 *
628 * Note: We're cheating a little here. Technically if the same algorithm
629 * is available from more than one provider then it is undefined which
630 * implementation you will get back. Theoretically this could be
631 * different every time...we assume here that you'll always get the
632 * same one back if you repeat the exact same fetch. Is this a reasonable
633 * assumption to make (in which case perhaps we should document this
634 * behaviour)?
635 */
636 if (EVP_KEYMGMT_get0_provider(keymgmt) == provider) {
637 /*
638 * We have a match - so we could use this signature;
639 * Check proper object registration first, though.
640 * Don't care about return value as this may have been
641 * done within providers or previous calls to
642 * add_provider_sigalgs.
643 */
644 OBJ_create(sinf->sigalg_oid, sinf->sigalg_name, NULL);
645 /* sanity check: Without successful registration don't use alg */
646 if ((OBJ_txt2nid(sinf->sigalg_name) == NID_undef) ||
647 (OBJ_nid2obj(OBJ_txt2nid(sinf->sigalg_name)) == NULL)) {
648 ERR_raise(ERR_LIB_SSL, ERR_R_PASSED_INVALID_ARGUMENT);
649 goto err;
650 }
651 if (sinf->sig_name != NULL)
652 OBJ_create(sinf->sig_oid, sinf->sig_name, NULL);
653 if (sinf->keytype != NULL)
654 OBJ_create(sinf->keytype_oid, sinf->keytype, NULL);
655 if (sinf->hash_name != NULL)
656 OBJ_create(sinf->hash_oid, sinf->hash_name, NULL);
657 OBJ_add_sigid(OBJ_txt2nid(sinf->sigalg_name),
658 (sinf->hash_name != NULL
659 ? OBJ_txt2nid(sinf->hash_name)
660 : NID_undef),
661 OBJ_txt2nid(keytype));
662 ctx->sigalg_list_len++;
663 sinf = NULL;
664 }
665 EVP_KEYMGMT_free(keymgmt);
666 }
667 ERR_pop_to_mark();
668 err:
669 if (sinf != NULL) {
670 OPENSSL_free(sinf->name);
671 sinf->name = NULL;
672 OPENSSL_free(sinf->sigalg_name);
673 sinf->sigalg_name = NULL;
674 OPENSSL_free(sinf->sigalg_oid);
675 sinf->sigalg_oid = NULL;
676 OPENSSL_free(sinf->sig_name);
677 sinf->sig_name = NULL;
678 OPENSSL_free(sinf->sig_oid);
679 sinf->sig_oid = NULL;
680 OPENSSL_free(sinf->hash_name);
681 sinf->hash_name = NULL;
682 OPENSSL_free(sinf->hash_oid);
683 sinf->hash_oid = NULL;
684 OPENSSL_free(sinf->keytype);
685 sinf->keytype = NULL;
686 OPENSSL_free(sinf->keytype_oid);
687 sinf->keytype_oid = NULL;
688 }
689 return ret;
690}
691
692static int discover_provider_sigalgs(OSSL_PROVIDER *provider, void *vctx)
693{
694 struct provider_ctx_data_st pgd;
695
696 pgd.ctx = vctx;
697 pgd.provider = provider;
698 OSSL_PROVIDER_get_capabilities(provider, "TLS-SIGALG",
699 add_provider_sigalgs, &pgd);
700 /*
701 * Always OK, even if provider doesn't support the capability:
702 * Reconsider testing retval when legacy sigalgs are also loaded this way.
703 */
704 return 1;
705}
706
707int ssl_load_sigalgs(SSL_CTX *ctx)
708{
709 size_t i;
710 SSL_CERT_LOOKUP lu;
711
712 if (!OSSL_PROVIDER_do_all(ctx->libctx, discover_provider_sigalgs, ctx))
713 return 0;
714
715 /* now populate ctx->ssl_cert_info */
716 if (ctx->sigalg_list_len > 0) {
717 ctx->ssl_cert_info = OPENSSL_zalloc(sizeof(lu) * ctx->sigalg_list_len);
718 if (ctx->ssl_cert_info == NULL)
719 return 0;
720 for(i = 0; i < ctx->sigalg_list_len; i++) {
721 ctx->ssl_cert_info[i].nid = OBJ_txt2nid(ctx->sigalg_list[i].sigalg_name);
722 ctx->ssl_cert_info[i].amask = SSL_aANY;
723 }
724 }
725
726 /*
727 * For now, leave it at this: legacy sigalgs stay in their own
728 * data structures until "legacy cleanup" occurs.
729 */
730
731 return 1;
732}
733
260009d8
MC		 734static uint16_t tls1_group_name2id(SSL_CTX *ctx, const char *name)
735{
736 size_t i;
260009d8
MC		 737
738 for (i = 0; i < ctx->group_list_len; i++) {
739 if (strcmp(ctx->group_list[i].tlsname, name) == 0
306b8e7e 740 || strcmp(ctx->group_list[i].realname, name) == 0)
260009d8
MC		 741 return ctx->group_list[i].group_id;
742 }
743
744 return 0;
745}
746
9d2d857f 747const TLS_GROUP_INFO *tls1_group_id_lookup(SSL_CTX *ctx, uint16_t group_id)
0f113f3e 748{
9aaecbfc 749 size_t i;
750
9d2d857f
MC		 751 for (i = 0; i < ctx->group_list_len; i++) {
752 if (ctx->group_list[i].group_id == group_id)
753 return &ctx->group_list[i];
9aaecbfc 754 }
9d2d857f 755
9aaecbfc 756 return NULL;
0f113f3e 757}
525de5d3 758
68668243
AB		 759const char *tls1_group_id2name(SSL_CTX *ctx, uint16_t group_id)
760{
761 const TLS_GROUP_INFO *tls_group_info = tls1_group_id_lookup(ctx, group_id);
762
763 if (tls_group_info == NULL)
764 return NULL;
765
766 return tls_group_info->tlsname;
767}
768
260009d8 769int tls1_group_id2nid(uint16_t group_id, int include_unknown)
84d4b9e3 770{
9d2d857f 771 size_t i;
84d4b9e3 772
260009d8
MC		 773 if (group_id == 0)
774 return NID_undef;
775
9d2d857f
MC		 776 /*
777 * Return well known Group NIDs - for backwards compatibility. This won't
778 * work for groups we don't know about.
779 */
780 for (i = 0; i < OSSL_NELEM(nid_to_group); i++)
781 {
782 if (nid_to_group[i].group_id == group_id)
783 return nid_to_group[i].nid;
784 }
260009d8
MC		 785 if (!include_unknown)
786 return NID_undef;
787 return TLSEXT_nid_unknown | (int)group_id;
84d4b9e3 788}
789
becbacd7 790uint16_t tls1_nid2group_id(int nid)
0f113f3e 791{
2fa2d15a 792 size_t i;
9aaecbfc 793
9d2d857f
MC		 794 /*
795 * Return well known Group ids - for backwards compatibility. This won't
796 * work for groups we don't know about.
797 */
798 for (i = 0; i < OSSL_NELEM(nid_to_group); i++)
799 {
800 if (nid_to_group[i].nid == nid)
801 return nid_to_group[i].group_id;
0f113f3e 802 }
9d2d857f 803
2fa2d15a 804 return 0;
0f113f3e
MC		 805}
806
740580c2 807/*
ff6d20a6
DSH		 808 * Set *pgroups to the supported groups list and *pgroupslen to
809 * the number of groups supported.
fd2b65ce 810 */
38b051a1 811void tls1_get_supported_groups(SSL_CONNECTION *s, const uint16_t **pgroups,
ff6d20a6 812 size_t *pgroupslen)
0f113f3e 813{
38b051a1
TM		 814 SSL_CTX *sctx = SSL_CONNECTION_GET_CTX(s);
815
34e5292c
DSH		 816 /* For Suite B mode only include P-256, P-384 */
817 switch (tls1_suiteb(s)) {
818 case SSL_CERT_FLAG_SUITEB_128_LOS:
ff6d20a6
DSH		 819 *pgroups = suiteb_curves;
820 *pgroupslen = OSSL_NELEM(suiteb_curves);
34e5292c
DSH		 821 break;
822
823 case SSL_CERT_FLAG_SUITEB_128_LOS_ONLY:
ff6d20a6
DSH		 824 *pgroups = suiteb_curves;
825 *pgroupslen = 1;
34e5292c
DSH		 826 break;
827
828 case SSL_CERT_FLAG_SUITEB_192_LOS:
ff6d20a6
DSH		 829 *pgroups = suiteb_curves + 1;
830 *pgroupslen = 1;
34e5292c
DSH		 831 break;
832
833 default:
834 if (s->ext.supportedgroups == NULL) {
38b051a1
TM		 835 *pgroups = sctx->ext.supported_groups_default;
836 *pgroupslen = sctx->ext.supported_groups_default_len;
34e5292c 837 } else {
ff6d20a6
DSH		 838 *pgroups = s->ext.supportedgroups;
839 *pgroupslen = s->ext.supportedgroups_len;
0f113f3e 840 }
34e5292c 841 break;
0f113f3e 842 }
0f113f3e 843}
b362ccab 844
38b051a1
TM		 845int tls_valid_group(SSL_CONNECTION *s, uint16_t group_id,
846 int minversion, int maxversion,
8b1db5d3 847 int isec, int *okfortls13)
9aaecbfc 848{
38b051a1
TM		 849 const TLS_GROUP_INFO *ginfo = tls1_group_id_lookup(SSL_CONNECTION_GET_CTX(s),
850 group_id);
9d2d857f 851 int ret;
6fd37948 852 int group_minversion, group_maxversion;
9aaecbfc 853
8b1db5d3 854 if (okfortls13 != NULL)
89e14ca7 855 *okfortls13 = 0;
8b1db5d3 856
9d2d857f
MC		 857 if (ginfo == NULL)
858 return 0;
859
6fd37948
FWH		 860 group_minversion = SSL_CONNECTION_IS_DTLS(s) ? ginfo->mindtls : ginfo->mintls;
861 group_maxversion = SSL_CONNECTION_IS_DTLS(s) ? ginfo->maxdtls : ginfo->maxtls;
862
863 if (group_minversion < 0 || group_maxversion < 0)
864 return 0;
865 if (group_maxversion == 0)
866 ret = 1;
867 else
868 ret = (ssl_version_cmp(s, minversion, group_maxversion) <= 0);
869 if (group_minversion > 0)
870 ret &= (ssl_version_cmp(s, maxversion, group_minversion) >= 0);
871
872 if (!SSL_CONNECTION_IS_DTLS(s)) {
8b1db5d3 873 if (ret && okfortls13 != NULL && maxversion == TLS1_3_VERSION)
6fd37948
FWH		 874 *okfortls13 = (group_maxversion == 0)
875 || (group_maxversion >= TLS1_3_VERSION);
9aaecbfc 876 }
8b1db5d3
MC		 877 ret &= !isec
878 || strcmp(ginfo->algorithm, "EC") == 0
879 || strcmp(ginfo->algorithm, "X25519") == 0
880 || strcmp(ginfo->algorithm, "X448") == 0;
9d2d857f
MC		 881
882 return ret;
9aaecbfc 883}
884
dbc6268f 885/* See if group is allowed by security callback */
38b051a1 886int tls_group_allowed(SSL_CONNECTION *s, uint16_t group, int op)
0f113f3e 887{
38b051a1
TM		 888 const TLS_GROUP_INFO *ginfo = tls1_group_id_lookup(SSL_CONNECTION_GET_CTX(s),
889 group);
dbc6268f 890 unsigned char gtmp[2];
5ce5f787 891
dbc6268f 892 if (ginfo == NULL)
0f113f3e 893 return 0;
9d2d857f 894
dbc6268f
MC		 895 gtmp[0] = group >> 8;
896 gtmp[1] = group & 0xff;
9d2d857f 897 return ssl_security(s, op, ginfo->secbits,
260009d8 898 tls1_group_id2nid(ginfo->group_id, 0), (void *)gtmp);
0f113f3e 899}
b362ccab 900
b50951d3
DSH		 901/* Return 1 if "id" is in "list" */
902static int tls1_in_list(uint16_t id, const uint16_t *list, size_t listlen)
903{
904 size_t i;
905 for (i = 0; i < listlen; i++)
906 if (list[i] == id)
907 return 1;
908 return 0;
909}
910
1d97c843 911/*-
8841154a 912 * For nmatch >= 0, return the id of the |nmatch|th shared group or 0
6977e8ee
KR		 913 * if there is no match.
914 * For nmatch == -1, return number of matches
8841154a 915 * For nmatch == -2, return the id of the group to use for
b50951d3 916 * a tmp key, or 0 if there is no match.
d0595f17 917 */
38b051a1 918uint16_t tls1_shared_group(SSL_CONNECTION *s, int nmatch)
0f113f3e 919{
9e84a42d 920 const uint16_t *pref, *supp;
b50951d3 921 size_t num_pref, num_supp, i;
0f113f3e 922 int k;
e609a456 923 SSL_CTX *ctx = SSL_CONNECTION_GET_CTX(s);
3e373518 924
0f113f3e
MC		 925 /* Can't do anything on client side */
926 if (s->server == 0)
8841154a 927 return 0;
0f113f3e
MC		 928 if (nmatch == -2) {
929 if (tls1_suiteb(s)) {
930 /*
931 * For Suite B ciphersuite determines curve: we already know
932 * these are acceptable due to previous checks.
933 */
555cbb32 934 unsigned long cid = s->s3.tmp.new_cipher->id;
3e373518 935
0f113f3e 936 if (cid == TLS1_CK_ECDHE_ECDSA_WITH_AES_128_GCM_SHA256)
0a10825a 937 return OSSL_TLS_GROUP_ID_secp256r1;
0f113f3e 938 if (cid == TLS1_CK_ECDHE_ECDSA_WITH_AES_256_GCM_SHA384)
0a10825a 939 return OSSL_TLS_GROUP_ID_secp384r1;
0f113f3e 940 /* Should never happen */
8841154a 941 return 0;
0f113f3e
MC		 942 }
943 /* If not Suite B just return first preference shared curve */
944 nmatch = 0;
945 }
946 /*
ff6d20a6
DSH		 947 * If server preference set, our groups are the preference order
948 * otherwise peer decides.
0f113f3e 949 */
ff6d20a6
DSH		 950 if (s->options & SSL_OP_CIPHER_SERVER_PREFERENCE) {
951 tls1_get_supported_groups(s, &pref, &num_pref);
952 tls1_get_peer_groups(s, &supp, &num_supp);
953 } else {
954 tls1_get_peer_groups(s, &pref, &num_pref);
955 tls1_get_supported_groups(s, &supp, &num_supp);
956 }
3c06513f 957
9e84a42d
DSH		 958 for (k = 0, i = 0; i < num_pref; i++) {
959 uint16_t id = pref[i];
e609a456 960 const TLS_GROUP_INFO *inf;
6fd37948 961 int minversion, maxversion;
3e373518 962
16f0e91c 963 if (!tls1_in_list(id, supp, num_supp)
0a10825a
BE		 964 || !tls_group_allowed(s, id, SSL_SECOP_CURVE_SHARED))
965 continue;
e609a456
MC		 966 inf = tls1_group_id_lookup(ctx, id);
967 if (!ossl_assert(inf != NULL))
968 return 0;
6fd37948
FWH		 969
970 minversion = SSL_CONNECTION_IS_DTLS(s)
971 ? inf->mindtls : inf->mintls;
972 maxversion = SSL_CONNECTION_IS_DTLS(s)
973 ? inf->maxdtls : inf->maxtls;
974 if (maxversion == -1)
975 continue;
976 if ((minversion != 0 && ssl_version_cmp(s, s->version, minversion) < 0)
977 || (maxversion != 0
978 && ssl_version_cmp(s, s->version, maxversion) > 0))
979 continue;
e609a456 980
b50951d3
DSH		 981 if (nmatch == k)
982 return id;
983 k++;
0f113f3e
MC		 984 }
985 if (nmatch == -1)
986 return k;
987 /* Out of range (nmatch > k). */
8841154a 988 return 0;
0f113f3e 989}
d0595f17 990
9e84a42d 991int tls1_set_groups(uint16_t **pext, size_t *pextlen,
de4d764e 992 int *groups, size_t ngroups)
0f113f3e 993{
9e84a42d 994 uint16_t *glist;
0f113f3e
MC		 995 size_t i;
996 /*
9aaecbfc 997 * Bitmap of groups included to detect duplicates: two variables are added
998 * to detect duplicates as some values are more than 32.
0f113f3e 999 */
9aaecbfc 1000 unsigned long *dup_list = NULL;
1001 unsigned long dup_list_egrp = 0;
1002 unsigned long dup_list_dhgrp = 0;
cdb10bae 1003
680bd131 1004 if (ngroups == 0) {
6849b73c 1005 ERR_raise(ERR_LIB_SSL, SSL_R_BAD_LENGTH);
680bd131
MC		 1006 return 0;
1007 }
e077455e 1008 if ((glist = OPENSSL_malloc(ngroups * sizeof(*glist))) == NULL)
0f113f3e 1009 return 0;
9e84a42d 1010 for (i = 0; i < ngroups; i++) {
0f113f3e 1011 unsigned long idmask;
9e84a42d 1012 uint16_t id;
4a1b4280 1013 id = tls1_nid2group_id(groups[i]);
9aaecbfc 1014 if ((id & 0x00FF) >= (sizeof(unsigned long) * 8))
1015 goto err;
1016 idmask = 1L << (id & 0x00FF);
1017 dup_list = (id < 0x100) ? &dup_list_egrp : &dup_list_dhgrp;
1018 if (!id || ((*dup_list) & idmask))
1019 goto err;
1020 *dup_list |= idmask;
9e84a42d 1021 glist[i] = id;
0f113f3e 1022 }
b548a1f1 1023 OPENSSL_free(*pext);
de4d764e 1024 *pext = glist;
9e84a42d 1025 *pextlen = ngroups;
0f113f3e 1026 return 1;
9aaecbfc 1027err:
1028 OPENSSL_free(glist);
1029 return 0;
0f113f3e
MC		 1030}
1031
57e7401f 1032# define GROUPLIST_INCREMENT 40
0a8e6c1f 1033# define GROUP_NAME_BUFFER_LENGTH 64
0f113f3e 1034typedef struct {
260009d8
MC		 1035 SSL_CTX *ctx;
1036 size_t gidcnt;
57e7401f
MC		 1037 size_t gidmax;
1038 uint16_t *gid_arr;
260009d8 1039} gid_cb_st;
d0595f17 1040
260009d8 1041static int gid_cb(const char *elem, int len, void *arg)
0f113f3e 1042{
260009d8 1043 gid_cb_st *garg = arg;
0f113f3e 1044 size_t i;
260009d8 1045 uint16_t gid = 0;
0a8e6c1f 1046 char etmp[GROUP_NAME_BUFFER_LENGTH];
260009d8 1047
2747d73c
KR		 1048 if (elem == NULL)
1049 return 0;
57e7401f
MC		 1050 if (garg->gidcnt == garg->gidmax) {
1051 uint16_t *tmp =
f4ed6eed
MB		 1052 OPENSSL_realloc(garg->gid_arr,
1053 (garg->gidmax + GROUPLIST_INCREMENT) * sizeof(*garg->gid_arr));
57e7401f
MC		 1054 if (tmp == NULL)
1055 return 0;
1056 garg->gidmax += GROUPLIST_INCREMENT;
1057 garg->gid_arr = tmp;
1058 }
0f113f3e
MC		 1059 if (len > (int)(sizeof(etmp) - 1))
1060 return 0;
1061 memcpy(etmp, elem, len);
1062 etmp[len] = 0;
260009d8
MC		 1063
1064 gid = tls1_group_name2id(garg->ctx, etmp);
ce8822b7
DB		 1065 if (gid == 0) {
1066 ERR_raise_data(ERR_LIB_SSL, ERR_R_PASSED_INVALID_ARGUMENT,
1067 "group '%s' cannot be set", etmp);
0f113f3e 1068 return 0;
ce8822b7 1069 }
260009d8
MC		 1070 for (i = 0; i < garg->gidcnt; i++)
1071 if (garg->gid_arr[i] == gid)
0f113f3e 1072 return 0;
260009d8 1073 garg->gid_arr[garg->gidcnt++] = gid;
0f113f3e
MC		 1074 return 1;
1075}
1076
260009d8
MC		 1077/* Set groups based on a colon separated list */
1078int tls1_set_groups_list(SSL_CTX *ctx, uint16_t **pext, size_t *pextlen,
1079 const char *str)
0f113f3e 1080{
260009d8
MC		 1081 gid_cb_st gcb;
1082 uint16_t *tmparr;
57e7401f 1083 int ret = 0;
260009d8
MC		 1084
1085 gcb.gidcnt = 0;
57e7401f
MC		 1086 gcb.gidmax = GROUPLIST_INCREMENT;
1087 gcb.gid_arr = OPENSSL_malloc(gcb.gidmax * sizeof(*gcb.gid_arr));
1088 if (gcb.gid_arr == NULL)
1089 return 0;
260009d8
MC		 1090 gcb.ctx = ctx;
1091 if (!CONF_parse_list(str, ':', 1, gid_cb, &gcb))
57e7401f
MC		 1092 goto end;
1093 if (pext == NULL) {
1094 ret = 1;
1095 goto end;
1096 }
260009d8
MC		 1097
1098 /*
1099 * gid_cb ensurse there are no duplicates so we can just go ahead and set
1100 * the result
1101 */
1102 tmparr = OPENSSL_memdup(gcb.gid_arr, gcb.gidcnt * sizeof(*tmparr));
1103 if (tmparr == NULL)
57e7401f 1104 goto end;
62ea5ffa 1105 OPENSSL_free(*pext);
260009d8
MC		 1106 *pext = tmparr;
1107 *pextlen = gcb.gidcnt;
57e7401f
MC		 1108 ret = 1;
1109 end:
1110 OPENSSL_free(gcb.gid_arr);
1111 return ret;
0f113f3e 1112}
b50951d3 1113
4a1b4280 1114/* Check a group id matches preferences */
38b051a1
TM		 1115int tls1_check_group_id(SSL_CONNECTION *s, uint16_t group_id,
1116 int check_own_groups)
4a1b4280
DSH		 1117 {
1118 const uint16_t *groups;
b50951d3 1119 size_t groups_len;
4a1b4280
DSH		 1120
1121 if (group_id == 0)
1122 return 0;
1123
6447e818 1124 /* Check for Suite B compliance */
555cbb32
TS		 1125 if (tls1_suiteb(s) && s->s3.tmp.new_cipher != NULL) {
1126 unsigned long cid = s->s3.tmp.new_cipher->id;
6447e818
DSH		 1127
1128 if (cid == TLS1_CK_ECDHE_ECDSA_WITH_AES_128_GCM_SHA256) {
0a10825a 1129 if (group_id != OSSL_TLS_GROUP_ID_secp256r1)
6447e818
DSH		 1130 return 0;
1131 } else if (cid == TLS1_CK_ECDHE_ECDSA_WITH_AES_256_GCM_SHA384) {
0a10825a 1132 if (group_id != OSSL_TLS_GROUP_ID_secp384r1)
6447e818
DSH		 1133 return 0;
1134 } else {
1135 /* Should never happen */
1136 return 0;
1137 }
1138 }
b50951d3 1139
dcf8b01f
MC		 1140 if (check_own_groups) {
1141 /* Check group is one of our preferences */
1142 tls1_get_supported_groups(s, &groups, &groups_len);
1143 if (!tls1_in_list(group_id, groups, groups_len))
1144 return 0;
1145 }
4a1b4280 1146
dbc6268f 1147 if (!tls_group_allowed(s, group_id, SSL_SECOP_CURVE_CHECK))
6447e818
DSH		 1148 return 0;
1149
4a1b4280
DSH		 1150 /* For clients, nothing more to check */
1151 if (!s->server)
1152 return 1;
1153
1154 /* Check group is one of peers preferences */
ff6d20a6 1155 tls1_get_peer_groups(s, &groups, &groups_len);
4a1b4280
DSH		 1156
1157 /*
1158 * RFC 4492 does not require the supported elliptic curves extension
1159 * so if it is not sent we can just choose any curve.
1160 * It is invalid to send an empty list in the supported groups
1161 * extension, so groups_len == 0 always means no extension.
1162 */
1163 if (groups_len == 0)
1164 return 1;
b50951d3 1165 return tls1_in_list(group_id, groups, groups_len);
0f113f3e 1166}
d61ff83b 1167
38b051a1 1168void tls1_get_formatlist(SSL_CONNECTION *s, const unsigned char **pformats,
7da160b0 1169 size_t *num_formats)
0f113f3e
MC		 1170{
1171 /*
1172 * If we have a custom point format list use it otherwise use default
1173 */
aff8c126
RS		 1174 if (s->ext.ecpointformats) {
1175 *pformats = s->ext.ecpointformats;
1176 *num_formats = s->ext.ecpointformats_len;
0f113f3e
MC		 1177 } else {
1178 *pformats = ecformats_default;
1179 /* For Suite B we don't support char2 fields */
1180 if (tls1_suiteb(s))
1181 *num_formats = sizeof(ecformats_default) - 1;
1182 else
1183 *num_formats = sizeof(ecformats_default);
1184 }
1185}
1186
dbc6268f 1187/* Check a key is compatible with compression extension */
38b051a1 1188static int tls1_check_pkey_comp(SSL_CONNECTION *s, EVP_PKEY *pkey)
dbc6268f 1189{
dbc6268f
MC		 1190 unsigned char comp_id;
1191 size_t i;
3d34bedf 1192 int point_conv;
dbc6268f
MC		 1193
1194 /* If not an EC key nothing to check */
c2041da8 1195 if (!EVP_PKEY_is_a(pkey, "EC"))
dbc6268f 1196 return 1;
5b5eea4b 1197
dbc6268f
MC		 1198
1199 /* Get required compression id */
3d34bedf
MC		 1200 point_conv = EVP_PKEY_get_ec_point_conv_form(pkey);
1201 if (point_conv == 0)
1202 return 0;
1203 if (point_conv == POINT_CONVERSION_UNCOMPRESSED) {
1204 comp_id = TLSEXT_ECPOINTFORMAT_uncompressed;
38b051a1 1205 } else if (SSL_CONNECTION_IS_TLS13(s)) {
5b5eea4b
SL		 1206 /*
1207 * ec_point_formats extension is not used in TLSv1.3 so we ignore
1208 * this check.
1209 */
1210 return 1;
dbc6268f 1211 } else {
3d34bedf 1212 int field_type = EVP_PKEY_get_field_type(pkey);
dbc6268f 1213
3d34bedf 1214 if (field_type == NID_X9_62_prime_field)
dbc6268f 1215 comp_id = TLSEXT_ECPOINTFORMAT_ansiX962_compressed_prime;
3d34bedf 1216 else if (field_type == NID_X9_62_characteristic_two_field)
dbc6268f
MC		 1217 comp_id = TLSEXT_ECPOINTFORMAT_ansiX962_compressed_char2;
1218 else
1219 return 0;
1220 }
1221 /*
1222 * If point formats extension present check it, otherwise everything is
1223 * supported (see RFC4492).
1224 */
cd0fb43c 1225 if (s->ext.peer_ecpointformats == NULL)
dbc6268f
MC		 1226 return 1;
1227
cd0fb43c
MC		 1228 for (i = 0; i < s->ext.peer_ecpointformats_len; i++) {
1229 if (s->ext.peer_ecpointformats[i] == comp_id)
dbc6268f
MC		 1230 return 1;
1231 }
1232 return 0;
1233}
1234
1235/* Return group id of a key */
1236static uint16_t tls1_get_group_id(EVP_PKEY *pkey)
1237{
d8975dec 1238 int curve_nid = ssl_get_EC_curve_nid(pkey);
dbc6268f 1239
c2041da8 1240 if (curve_nid == NID_undef)
dbc6268f 1241 return 0;
c2041da8 1242 return tls1_nid2group_id(curve_nid);
dbc6268f
MC		 1243}
1244
0f113f3e
MC		 1245/*
1246 * Check cert parameters compatible with extensions: currently just checks EC
1247 * certificates have compatible curves and compression.
d61ff83b 1248 */
38b051a1 1249static int tls1_check_cert_param(SSL_CONNECTION *s, X509 *x, int check_ee_md)
0f113f3e 1250{
4a1b4280 1251 uint16_t group_id;
0f113f3e 1252 EVP_PKEY *pkey;
8382fd3a 1253 pkey = X509_get0_pubkey(x);
4a1b4280 1254 if (pkey == NULL)
0f113f3e
MC		 1255 return 0;
1256 /* If not EC nothing to do */
c2041da8 1257 if (!EVP_PKEY_is_a(pkey, "EC"))
0f113f3e 1258 return 1;
4a1b4280
DSH		 1259 /* Check compression */
1260 if (!tls1_check_pkey_comp(s, pkey))
0f113f3e 1261 return 0;
4a1b4280 1262 group_id = tls1_get_group_id(pkey);
dcf8b01f
MC		 1263 /*
1264 * For a server we allow the certificate to not be in our list of supported
1265 * groups.
1266 */
1267 if (!tls1_check_group_id(s, group_id, !s->server))
0f113f3e
MC		 1268 return 0;
1269 /*
1270 * Special case for suite B. We *MUST* sign using SHA256+P-256 or
9195ddcd 1271 * SHA384+P-384.
0f113f3e 1272 */
9195ddcd 1273 if (check_ee_md && tls1_suiteb(s)) {
0f113f3e
MC		 1274 int check_md;
1275 size_t i;
9e84a42d 1276
0f113f3e 1277 /* Check to see we have necessary signing algorithm */
0a10825a 1278 if (group_id == OSSL_TLS_GROUP_ID_secp256r1)
0f113f3e 1279 check_md = NID_ecdsa_with_SHA256;
0a10825a 1280 else if (group_id == OSSL_TLS_GROUP_ID_secp384r1)
0f113f3e
MC		 1281 check_md = NID_ecdsa_with_SHA384;
1282 else
1283 return 0; /* Should never happen */
29948ac8
BK		 1284 for (i = 0; i < s->shared_sigalgslen; i++) {
1285 if (check_md == s->shared_sigalgs[i]->sigandhash)
1e331727 1286 return 1;
4a1b4280
DSH		 1287 }
1288 return 0;
0f113f3e 1289 }
4a1b4280 1290 return 1;
0f113f3e
MC		 1291}
1292
6977e8ee 1293/*
8483a003 1294 * tls1_check_ec_tmp_key - Check EC temporary key compatibility
6977e8ee
KR		 1295 * @s: SSL connection
1296 * @cid: Cipher ID we're considering using
1297 *
1298 * Checks that the kECDHE cipher suite we're considering using
1299 * is compatible with the client extensions.
1300 *
1301 * Returns 0 when the cipher can't be used or 1 when it can.
1302 */
38b051a1 1303int tls1_check_ec_tmp_key(SSL_CONNECTION *s, unsigned long cid)
0f113f3e 1304{
4a1b4280
DSH		 1305 /* If not Suite B just need a shared group */
1306 if (!tls1_suiteb(s))
1307 return tls1_shared_group(s, 0) != 0;
0f113f3e
MC		 1308 /*
1309 * If Suite B, AES128 MUST use P-256 and AES256 MUST use P-384, no other
1310 * curves permitted.
1311 */
4a1b4280 1312 if (cid == TLS1_CK_ECDHE_ECDSA_WITH_AES_128_GCM_SHA256)
0a10825a 1313 return tls1_check_group_id(s, OSSL_TLS_GROUP_ID_secp256r1, 1);
4a1b4280 1314 if (cid == TLS1_CK_ECDHE_ECDSA_WITH_AES_256_GCM_SHA384)
0a10825a 1315 return tls1_check_group_id(s, OSSL_TLS_GROUP_ID_secp384r1, 1);
4a1b4280
DSH		 1316
1317 return 0;
0f113f3e 1318}
d0595f17 1319
703bcee0 1320/* Default sigalg schemes */
98c792d1 1321static const uint16_t tls12_sigalgs[] = {
703bcee0
MC		 1322 TLSEXT_SIGALG_ecdsa_secp256r1_sha256,
1323 TLSEXT_SIGALG_ecdsa_secp384r1_sha384,
1324 TLSEXT_SIGALG_ecdsa_secp521r1_sha512,
3d234c9e 1325 TLSEXT_SIGALG_ed25519,
0e1d6ecf 1326 TLSEXT_SIGALG_ed448,
0a10825a
BE		 1327 TLSEXT_SIGALG_ecdsa_brainpoolP256r1_sha256,
1328 TLSEXT_SIGALG_ecdsa_brainpoolP384r1_sha384,
1329 TLSEXT_SIGALG_ecdsa_brainpoolP512r1_sha512,
0f113f3e 1330
f55e99f7
BK		 1331 TLSEXT_SIGALG_rsa_pss_pss_sha256,
1332 TLSEXT_SIGALG_rsa_pss_pss_sha384,
1333 TLSEXT_SIGALG_rsa_pss_pss_sha512,
1334 TLSEXT_SIGALG_rsa_pss_rsae_sha256,
1335 TLSEXT_SIGALG_rsa_pss_rsae_sha384,
1336 TLSEXT_SIGALG_rsa_pss_rsae_sha512,
536199ec 1337
703bcee0
MC		 1338 TLSEXT_SIGALG_rsa_pkcs1_sha256,
1339 TLSEXT_SIGALG_rsa_pkcs1_sha384,
1340 TLSEXT_SIGALG_rsa_pkcs1_sha512,
0f113f3e 1341
d8311fc9 1342 TLSEXT_SIGALG_ecdsa_sha224,
42ab2230 1343 TLSEXT_SIGALG_ecdsa_sha1,
462f4f4b 1344
d8311fc9 1345 TLSEXT_SIGALG_rsa_pkcs1_sha224,
42ab2230 1346 TLSEXT_SIGALG_rsa_pkcs1_sha1,
e376242d 1347
d8311fc9 1348 TLSEXT_SIGALG_dsa_sha224,
42ab2230
MC		 1349 TLSEXT_SIGALG_dsa_sha1,
1350
703bcee0
MC		 1351 TLSEXT_SIGALG_dsa_sha256,
1352 TLSEXT_SIGALG_dsa_sha384,
41f10305 1353 TLSEXT_SIGALG_dsa_sha512,
e376242d 1354
41f10305 1355#ifndef OPENSSL_NO_GOST
6f892296
NM		 1356 TLSEXT_SIGALG_gostr34102012_256_intrinsic,
1357 TLSEXT_SIGALG_gostr34102012_512_intrinsic,
41f10305
DB		 1358 TLSEXT_SIGALG_gostr34102012_256_gostr34112012_256,
1359 TLSEXT_SIGALG_gostr34102012_512_gostr34112012_512,
1360 TLSEXT_SIGALG_gostr34102001_gostr3411,
5eeb6c6e 1361#endif
fc101f88 1362};
0f113f3e 1363
462f4f4b 1364
98c792d1 1365static const uint16_t suiteb_sigalgs[] = {
703bcee0
MC		 1366 TLSEXT_SIGALG_ecdsa_secp256r1_sha256,
1367 TLSEXT_SIGALG_ecdsa_secp384r1_sha384
2ea80354 1368};
aff8c126 1369
7a531ee4 1370static const SIGALG_LOOKUP sigalg_lookup_tbl[] = {
edbfba1a 1371 {"ecdsa_secp256r1_sha256", TLSEXT_SIGALG_ecdsa_secp256r1_sha256,
17ae384e 1372 NID_sha256, SSL_MD_SHA256_IDX, EVP_PKEY_EC, SSL_PKEY_ECC,
263ff2c9 1373 NID_ecdsa_with_SHA256, NID_X9_62_prime256v1, 1},
edbfba1a 1374 {"ecdsa_secp384r1_sha384", TLSEXT_SIGALG_ecdsa_secp384r1_sha384,
17ae384e 1375 NID_sha384, SSL_MD_SHA384_IDX, EVP_PKEY_EC, SSL_PKEY_ECC,
263ff2c9 1376 NID_ecdsa_with_SHA384, NID_secp384r1, 1},
edbfba1a 1377 {"ecdsa_secp521r1_sha512", TLSEXT_SIGALG_ecdsa_secp521r1_sha512,
17ae384e 1378 NID_sha512, SSL_MD_SHA512_IDX, EVP_PKEY_EC, SSL_PKEY_ECC,
263ff2c9 1379 NID_ecdsa_with_SHA512, NID_secp521r1, 1},
b04d4e38 1380 {"ed25519", TLSEXT_SIGALG_ed25519,
d2916a5b 1381 NID_undef, -1, EVP_PKEY_ED25519, SSL_PKEY_ED25519,
263ff2c9 1382 NID_undef, NID_undef, 1},
0e1d6ecf
MC		 1383 {"ed448", TLSEXT_SIGALG_ed448,
1384 NID_undef, -1, EVP_PKEY_ED448, SSL_PKEY_ED448,
263ff2c9 1385 NID_undef, NID_undef, 1},
d8311fc9
MC		 1386 {NULL, TLSEXT_SIGALG_ecdsa_sha224,
1387 NID_sha224, SSL_MD_SHA224_IDX, EVP_PKEY_EC, SSL_PKEY_ECC,
263ff2c9 1388 NID_ecdsa_with_SHA224, NID_undef, 1},
edbfba1a 1389 {NULL, TLSEXT_SIGALG_ecdsa_sha1,
17ae384e 1390 NID_sha1, SSL_MD_SHA1_IDX, EVP_PKEY_EC, SSL_PKEY_ECC,
263ff2c9 1391 NID_ecdsa_with_SHA1, NID_undef, 1},
0a10825a
BE		 1392 {"ecdsa_brainpoolP256r1_sha256", TLSEXT_SIGALG_ecdsa_brainpoolP256r1_sha256,
1393 NID_sha256, SSL_MD_SHA256_IDX, EVP_PKEY_EC, SSL_PKEY_ECC,
1394 NID_ecdsa_with_SHA256, NID_brainpoolP256r1, 1},
1395 {"ecdsa_brainpoolP384r1_sha384", TLSEXT_SIGALG_ecdsa_brainpoolP384r1_sha384,
1396 NID_sha384, SSL_MD_SHA384_IDX, EVP_PKEY_EC, SSL_PKEY_ECC,
1397 NID_ecdsa_with_SHA384, NID_brainpoolP384r1, 1},
1398 {"ecdsa_brainpoolP512r1_sha512", TLSEXT_SIGALG_ecdsa_brainpoolP512r1_sha512,
1399 NID_sha512, SSL_MD_SHA512_IDX, EVP_PKEY_EC, SSL_PKEY_ECC,
1400 NID_ecdsa_with_SHA512, NID_brainpoolP512r1, 1},
f55e99f7
BK		 1401 {"rsa_pss_rsae_sha256", TLSEXT_SIGALG_rsa_pss_rsae_sha256,
1402 NID_sha256, SSL_MD_SHA256_IDX, EVP_PKEY_RSA_PSS, SSL_PKEY_RSA,
263ff2c9 1403 NID_undef, NID_undef, 1},
f55e99f7
BK		 1404 {"rsa_pss_rsae_sha384", TLSEXT_SIGALG_rsa_pss_rsae_sha384,
1405 NID_sha384, SSL_MD_SHA384_IDX, EVP_PKEY_RSA_PSS, SSL_PKEY_RSA,
263ff2c9 1406 NID_undef, NID_undef, 1},
f55e99f7
BK		 1407 {"rsa_pss_rsae_sha512", TLSEXT_SIGALG_rsa_pss_rsae_sha512,
1408 NID_sha512, SSL_MD_SHA512_IDX, EVP_PKEY_RSA_PSS, SSL_PKEY_RSA,
263ff2c9 1409 NID_undef, NID_undef, 1},
f55e99f7 1410 {"rsa_pss_pss_sha256", TLSEXT_SIGALG_rsa_pss_pss_sha256,
17ae384e 1411 NID_sha256, SSL_MD_SHA256_IDX, EVP_PKEY_RSA_PSS, SSL_PKEY_RSA_PSS_SIGN,
263ff2c9 1412 NID_undef, NID_undef, 1},
f55e99f7 1413 {"rsa_pss_pss_sha384", TLSEXT_SIGALG_rsa_pss_pss_sha384,
17ae384e 1414 NID_sha384, SSL_MD_SHA384_IDX, EVP_PKEY_RSA_PSS, SSL_PKEY_RSA_PSS_SIGN,
263ff2c9 1415 NID_undef, NID_undef, 1},
f55e99f7 1416 {"rsa_pss_pss_sha512", TLSEXT_SIGALG_rsa_pss_pss_sha512,
17ae384e 1417 NID_sha512, SSL_MD_SHA512_IDX, EVP_PKEY_RSA_PSS, SSL_PKEY_RSA_PSS_SIGN,
263ff2c9 1418 NID_undef, NID_undef, 1},
edbfba1a 1419 {"rsa_pkcs1_sha256", TLSEXT_SIGALG_rsa_pkcs1_sha256,
d0ff28f8 1420 NID_sha256, SSL_MD_SHA256_IDX, EVP_PKEY_RSA, SSL_PKEY_RSA,
263ff2c9 1421 NID_sha256WithRSAEncryption, NID_undef, 1},
edbfba1a 1422 {"rsa_pkcs1_sha384", TLSEXT_SIGALG_rsa_pkcs1_sha384,
d0ff28f8 1423 NID_sha384, SSL_MD_SHA384_IDX, EVP_PKEY_RSA, SSL_PKEY_RSA,
263ff2c9 1424 NID_sha384WithRSAEncryption, NID_undef, 1},
edbfba1a 1425 {"rsa_pkcs1_sha512", TLSEXT_SIGALG_rsa_pkcs1_sha512,
d0ff28f8 1426 NID_sha512, SSL_MD_SHA512_IDX, EVP_PKEY_RSA, SSL_PKEY_RSA,
263ff2c9 1427 NID_sha512WithRSAEncryption, NID_undef, 1},
d8311fc9
MC		 1428 {"rsa_pkcs1_sha224", TLSEXT_SIGALG_rsa_pkcs1_sha224,
1429 NID_sha224, SSL_MD_SHA224_IDX, EVP_PKEY_RSA, SSL_PKEY_RSA,
263ff2c9 1430 NID_sha224WithRSAEncryption, NID_undef, 1},
edbfba1a 1431 {"rsa_pkcs1_sha1", TLSEXT_SIGALG_rsa_pkcs1_sha1,
d0ff28f8 1432 NID_sha1, SSL_MD_SHA1_IDX, EVP_PKEY_RSA, SSL_PKEY_RSA,
263ff2c9 1433 NID_sha1WithRSAEncryption, NID_undef, 1},
edbfba1a 1434 {NULL, TLSEXT_SIGALG_dsa_sha256,
17ae384e 1435 NID_sha256, SSL_MD_SHA256_IDX, EVP_PKEY_DSA, SSL_PKEY_DSA_SIGN,
263ff2c9 1436 NID_dsa_with_SHA256, NID_undef, 1},
edbfba1a 1437 {NULL, TLSEXT_SIGALG_dsa_sha384,
17ae384e 1438 NID_sha384, SSL_MD_SHA384_IDX, EVP_PKEY_DSA, SSL_PKEY_DSA_SIGN,
263ff2c9 1439 NID_undef, NID_undef, 1},
edbfba1a 1440 {NULL, TLSEXT_SIGALG_dsa_sha512,
17ae384e 1441 NID_sha512, SSL_MD_SHA512_IDX, EVP_PKEY_DSA, SSL_PKEY_DSA_SIGN,
263ff2c9 1442 NID_undef, NID_undef, 1},
d8311fc9
MC		 1443 {NULL, TLSEXT_SIGALG_dsa_sha224,
1444 NID_sha224, SSL_MD_SHA224_IDX, EVP_PKEY_DSA, SSL_PKEY_DSA_SIGN,
263ff2c9 1445 NID_undef, NID_undef, 1},
edbfba1a 1446 {NULL, TLSEXT_SIGALG_dsa_sha1,
17ae384e 1447 NID_sha1, SSL_MD_SHA1_IDX, EVP_PKEY_DSA, SSL_PKEY_DSA_SIGN,
263ff2c9 1448 NID_dsaWithSHA1, NID_undef, 1},
5eeb6c6e 1449#ifndef OPENSSL_NO_GOST
6f892296
NM		 1450 {NULL, TLSEXT_SIGALG_gostr34102012_256_intrinsic,
1451 NID_id_GostR3411_2012_256, SSL_MD_GOST12_256_IDX,
1452 NID_id_GostR3410_2012_256, SSL_PKEY_GOST12_256,
263ff2c9 1453 NID_undef, NID_undef, 1},
6f892296
NM		 1454 {NULL, TLSEXT_SIGALG_gostr34102012_512_intrinsic,
1455 NID_id_GostR3411_2012_512, SSL_MD_GOST12_512_IDX,
1456 NID_id_GostR3410_2012_512, SSL_PKEY_GOST12_512,
263ff2c9 1457 NID_undef, NID_undef, 1},
edbfba1a 1458 {NULL, TLSEXT_SIGALG_gostr34102012_256_gostr34112012_256,
17ae384e
DSH		 1459 NID_id_GostR3411_2012_256, SSL_MD_GOST12_256_IDX,
1460 NID_id_GostR3410_2012_256, SSL_PKEY_GOST12_256,
263ff2c9 1461 NID_undef, NID_undef, 1},
edbfba1a 1462 {NULL, TLSEXT_SIGALG_gostr34102012_512_gostr34112012_512,
17ae384e
DSH		 1463 NID_id_GostR3411_2012_512, SSL_MD_GOST12_512_IDX,
1464 NID_id_GostR3410_2012_512, SSL_PKEY_GOST12_512,
263ff2c9 1465 NID_undef, NID_undef, 1},
edbfba1a 1466 {NULL, TLSEXT_SIGALG_gostr34102001_gostr3411,
17ae384e
DSH		 1467 NID_id_GostR3411_94, SSL_MD_GOST94_IDX,
1468 NID_id_GostR3410_2001, SSL_PKEY_GOST01,
263ff2c9 1469 NID_undef, NID_undef, 1}
5eeb6c6e 1470#endif
703bcee0 1471};
0972bc5c
DSH		 1472/* Legacy sigalgs for TLS < 1.2 RSA TLS signatures */
1473static const SIGALG_LOOKUP legacy_rsa_sigalg = {
1474 "rsa_pkcs1_md5_sha1", 0,
1475 NID_md5_sha1, SSL_MD_MD5_SHA1_IDX,
1476 EVP_PKEY_RSA, SSL_PKEY_RSA,
263ff2c9 1477 NID_undef, NID_undef, 1
0972bc5c
DSH		 1478};
1479
1480/*
1481 * Default signature algorithm values used if signature algorithms not present.
1482 * From RFC5246. Note: order must match certificate index order.
1483 */
1484static const uint16_t tls_default_sigalg[] = {
1485 TLSEXT_SIGALG_rsa_pkcs1_sha1, /* SSL_PKEY_RSA */
045d078a 1486 0, /* SSL_PKEY_RSA_PSS_SIGN */
0972bc5c
DSH		 1487 TLSEXT_SIGALG_dsa_sha1, /* SSL_PKEY_DSA_SIGN */
1488 TLSEXT_SIGALG_ecdsa_sha1, /* SSL_PKEY_ECC */
1489 TLSEXT_SIGALG_gostr34102001_gostr3411, /* SSL_PKEY_GOST01 */
6f892296
NM		 1490 TLSEXT_SIGALG_gostr34102012_256_intrinsic, /* SSL_PKEY_GOST12_256 */
1491 TLSEXT_SIGALG_gostr34102012_512_intrinsic, /* SSL_PKEY_GOST12_512 */
0e1d6ecf
MC		 1492 0, /* SSL_PKEY_ED25519 */
1493 0, /* SSL_PKEY_ED448 */
0972bc5c 1494};
703bcee0 1495
ee58915c 1496int ssl_setup_sigalgs(SSL_CTX *ctx)
263ff2c9 1497{
ee58915c 1498 size_t i, cache_idx, sigalgs_len;
263ff2c9 1499 const SIGALG_LOOKUP *lu;
ee58915c
MB		 1500 SIGALG_LOOKUP *cache = NULL;
1501 uint16_t *tls12_sigalgs_list = NULL;
263ff2c9
MC		 1502 EVP_PKEY *tmpkey = EVP_PKEY_new();
1503 int ret = 0;
1504
ee58915c
MB		 1505 if (ctx == NULL)
1506 goto err;
1507
1508 sigalgs_len = OSSL_NELEM(sigalg_lookup_tbl) + ctx->sigalg_list_len;
1509
1510 cache = OPENSSL_malloc(sizeof(const SIGALG_LOOKUP) * sigalgs_len);
263ff2c9
MC		 1511 if (cache == NULL || tmpkey == NULL)
1512 goto err;
1513
ee58915c
MB		 1514 tls12_sigalgs_list = OPENSSL_malloc(sizeof(uint16_t) * sigalgs_len);
1515 if (tls12_sigalgs_list == NULL)
1516 goto err;
1517
263ff2c9 1518 ERR_set_mark();
ee58915c 1519 /* First fill cache and tls12_sigalgs list from legacy algorithm list */
263ff2c9
MC		 1520 for (i = 0, lu = sigalg_lookup_tbl;
1521 i < OSSL_NELEM(sigalg_lookup_tbl); lu++, i++) {
1522 EVP_PKEY_CTX *pctx;
1523
1524 cache[i] = *lu;
ee58915c 1525 tls12_sigalgs_list[i] = tls12_sigalgs[i];
263ff2c9
MC		 1526
1527 /*
1528 * Check hash is available.
57e7401f 1529 * This test is not perfect. A provider could have support
263ff2c9
MC		 1530 * for a signature scheme, but not a particular hash. However the hash
1531 * could be available from some other loaded provider. In that case it
1532 * could be that the signature is available, and the hash is available
1533 * independently - but not as a combination. We ignore this for now.
1534 */
1535 if (lu->hash != NID_undef
1536 && ctx->ssl_digest_methods[lu->hash_idx] == NULL) {
1537 cache[i].enabled = 0;
1538 continue;
1539 }
1540
1541 if (!EVP_PKEY_set_type(tmpkey, lu->sig)) {
1542 cache[i].enabled = 0;
1543 continue;
1544 }
1545 pctx = EVP_PKEY_CTX_new_from_pkey(ctx->libctx, tmpkey, ctx->propq);
1546 /* If unable to create pctx we assume the sig algorithm is unavailable */
1547 if (pctx == NULL)
1548 cache[i].enabled = 0;
1549 EVP_PKEY_CTX_free(pctx);
1550 }
ee58915c
MB		 1551
1552 /* Now complete cache and tls12_sigalgs list with provider sig information */
1553 cache_idx = OSSL_NELEM(sigalg_lookup_tbl);
1554 for (i = 0; i < ctx->sigalg_list_len; i++) {
1555 TLS_SIGALG_INFO si = ctx->sigalg_list[i];
1556 cache[cache_idx].name = si.name;
1557 cache[cache_idx].sigalg = si.code_point;
1558 tls12_sigalgs_list[cache_idx] = si.code_point;
1559 cache[cache_idx].hash = si.hash_name?OBJ_txt2nid(si.hash_name):NID_undef;
1560 cache[cache_idx].hash_idx = ssl_get_md_idx(cache[cache_idx].hash);
1561 cache[cache_idx].sig = OBJ_txt2nid(si.sigalg_name);
1562 cache[cache_idx].sig_idx = i + SSL_PKEY_NUM;
1563 cache[cache_idx].sigandhash = OBJ_txt2nid(si.sigalg_name);
1564 cache[cache_idx].curve = NID_undef;
1565 /* all provided sigalgs are enabled by load */
1566 cache[cache_idx].enabled = 1;
1567 cache_idx++;
1568 }
263ff2c9
MC		 1569 ERR_pop_to_mark();
1570 ctx->sigalg_lookup_cache = cache;
ee58915c
MB		 1571 ctx->tls12_sigalgs = tls12_sigalgs_list;
1572 ctx->tls12_sigalgs_len = sigalgs_len;
263ff2c9 1573 cache = NULL;
ee58915c 1574 tls12_sigalgs_list = NULL;
263ff2c9
MC		 1575
1576 ret = 1;
1577 err:
1578 OPENSSL_free(cache);
ee58915c 1579 OPENSSL_free(tls12_sigalgs_list);
263ff2c9
MC		 1580 EVP_PKEY_free(tmpkey);
1581 return ret;
1582}
1583
4d43ee28 1584/* Lookup TLS signature algorithm */
38b051a1
TM		 1585static const SIGALG_LOOKUP *tls1_lookup_sigalg(const SSL_CONNECTION *s,
1586 uint16_t sigalg)
703bcee0
MC		 1587{
1588 size_t i;
263ff2c9 1589 const SIGALG_LOOKUP *lu;
703bcee0 1590
38b051a1 1591 for (i = 0, lu = SSL_CONNECTION_GET_CTX(s)->sigalg_lookup_cache;
ee58915c 1592 i < SSL_CONNECTION_GET_CTX(s)->tls12_sigalgs_len;
263ff2c9 1593 lu++, i++) {
54e3efff
MC		 1594 if (lu->sigalg == sigalg) {
1595 if (!lu->enabled)
1596 return NULL;
263ff2c9 1597 return lu;
54e3efff 1598 }
703bcee0 1599 }
4d43ee28
DSH		 1600 return NULL;
1601}
168067b6 1602/* Lookup hash: return 0 if invalid or not enabled */
c8f6c28a 1603int tls1_lookup_md(SSL_CTX *ctx, const SIGALG_LOOKUP *lu, const EVP_MD **pmd)
168067b6
DSH		 1604{
1605 const EVP_MD *md;
38b051a1 1606
168067b6
DSH		 1607 if (lu == NULL)
1608 return 0;
1609 /* lu->hash == NID_undef means no associated digest */
1610 if (lu->hash == NID_undef) {
1611 md = NULL;
1612 } else {
c8f6c28a 1613 md = ssl_md(ctx, lu->hash_idx);
168067b6
DSH		 1614 if (md == NULL)
1615 return 0;
1616 }
1617 if (pmd)
1618 *pmd = md;
1619 return 1;
1620}
1621
0fe3db25
NR		 1622/*
1623 * Check if key is large enough to generate RSA-PSS signature.
1624 *
1625 * The key must greater than or equal to 2 * hash length + 2.
1626 * SHA512 has a hash length of 64 bytes, which is incompatible
1627 * with a 128 byte (1024 bit) key.
1628 */
ed576acd 1629#define RSA_PSS_MINIMUM_KEY_SIZE(md) (2 * EVP_MD_get_size(md) + 2)
c5f87134 1630static int rsa_pss_check_min_key_size(SSL_CTX *ctx, const EVP_PKEY *pkey,
c8f6c28a 1631 const SIGALG_LOOKUP *lu)
0fe3db25
NR		 1632{
1633 const EVP_MD *md;
1634
c5f87134 1635 if (pkey == NULL)
0fe3db25 1636 return 0;
c8f6c28a 1637 if (!tls1_lookup_md(ctx, lu, &md) || md == NULL)
0fe3db25 1638 return 0;
ed576acd 1639 if (EVP_PKEY_get_size(pkey) < RSA_PSS_MINIMUM_KEY_SIZE(md))
0fe3db25
NR		 1640 return 0;
1641 return 1;
1642}
1643
0972bc5c 1644/*
b0031e5d
KR		 1645 * Returns a signature algorithm when the peer did not send a list of supported
1646 * signature algorithms. The signature algorithm is fixed for the certificate
1647 * type. |idx| is a certificate type index (SSL_PKEY_*). When |idx| is -1 the
1648 * certificate type from |s| will be used.
1649 * Returns the signature algorithm to use, or NULL on error.
0972bc5c 1650 */
38b051a1
TM		 1651static const SIGALG_LOOKUP *tls1_get_legacy_sigalg(const SSL_CONNECTION *s,
1652 int idx)
0972bc5c 1653{
7f6b466b
DSH		 1654 if (idx == -1) {
1655 if (s->server) {
1656 size_t i;
1657
1658 /* Work out index corresponding to ciphersuite */
ee58915c
MB		 1659 for (i = 0; i < s->ssl_pkey_num; i++) {
1660 const SSL_CERT_LOOKUP *clu
1661 = ssl_cert_lookup_by_idx(i, SSL_CONNECTION_GET_CTX(s));
7f6b466b 1662
ed5b26ce
P		 1663 if (clu == NULL)
1664 continue;
555cbb32 1665 if (clu->amask & s->s3.tmp.new_cipher->algorithm_auth) {
7f6b466b
DSH		 1666 idx = i;
1667 break;
1668 }
1669 }
1f65c045
DB		 1670
1671 /*
1672 * Some GOST ciphersuites allow more than one signature algorithms
1673 * */
555cbb32 1674 if (idx == SSL_PKEY_GOST01 && s->s3.tmp.new_cipher->algorithm_auth != SSL_aGOST01) {
1f65c045
DB		 1675 int real_idx;
1676
1677 for (real_idx = SSL_PKEY_GOST12_512; real_idx >= SSL_PKEY_GOST01;
1678 real_idx--) {
1679 if (s->cert->pkeys[real_idx].privatekey != NULL) {
1680 idx = real_idx;
1681 break;
1682 }
1683 }
1684 }
5a5530a2
DB		 1685 /*
1686 * As both SSL_PKEY_GOST12_512 and SSL_PKEY_GOST12_256 indices can be used
1687 * with new (aGOST12-only) ciphersuites, we should find out which one is available really.
1688 */
1689 else if (idx == SSL_PKEY_GOST12_256) {
1690 int real_idx;
1691
1692 for (real_idx = SSL_PKEY_GOST12_512; real_idx >= SSL_PKEY_GOST12_256;
1693 real_idx--) {
1694 if (s->cert->pkeys[real_idx].privatekey != NULL) {
1695 idx = real_idx;
1696 break;
1697 }
1698 }
1699 }
7f6b466b
DSH		 1700 } else {
1701 idx = s->cert->key - s->cert->pkeys;
1702 }
1703 }
0972bc5c
DSH		 1704 if (idx < 0 || idx >= (int)OSSL_NELEM(tls_default_sigalg))
1705 return NULL;
ee58915c 1706
0972bc5c 1707 if (SSL_USE_SIGALGS(s) || idx != SSL_PKEY_RSA) {
263ff2c9 1708 const SIGALG_LOOKUP *lu = tls1_lookup_sigalg(s, tls_default_sigalg[idx]);
0972bc5c 1709
54e3efff
MC		 1710 if (lu == NULL)
1711 return NULL;
38b051a1 1712 if (!tls1_lookup_md(SSL_CONNECTION_GET_CTX(s), lu, NULL))
0972bc5c 1713 return NULL;
b0031e5d
KR		 1714 if (!tls12_sigalg_allowed(s, SSL_SECOP_SIGALG_SUPPORTED, lu))
1715 return NULL;
0972bc5c
DSH		 1716 return lu;
1717 }
b0031e5d
KR		 1718 if (!tls12_sigalg_allowed(s, SSL_SECOP_SIGALG_SUPPORTED, &legacy_rsa_sigalg))
1719 return NULL;
0972bc5c
DSH		 1720 return &legacy_rsa_sigalg;
1721}
1722/* Set peer sigalg based key type */
38b051a1 1723int tls1_set_peer_legacy_sigalg(SSL_CONNECTION *s, const EVP_PKEY *pkey)
0972bc5c 1724{
52fd27f9
DSH		 1725 size_t idx;
1726 const SIGALG_LOOKUP *lu;
0972bc5c 1727
ee58915c 1728 if (ssl_cert_lookup_by_pkey(pkey, &idx, SSL_CONNECTION_GET_CTX(s)) == NULL)
52fd27f9
DSH		 1729 return 0;
1730 lu = tls1_get_legacy_sigalg(s, idx);
0972bc5c
DSH		 1731 if (lu == NULL)
1732 return 0;
555cbb32 1733 s->s3.tmp.peer_sigalg = lu;
0972bc5c
DSH		 1734 return 1;
1735}
703bcee0 1736
38b051a1 1737size_t tls12_get_psigalgs(SSL_CONNECTION *s, int sent, const uint16_t **psigs)
0f113f3e
MC		 1738{
1739 /*
1740 * If Suite B mode use Suite B sigalgs only, ignore any other
1741 * preferences.
1742 */
0f113f3e
MC		 1743 switch (tls1_suiteb(s)) {
1744 case SSL_CERT_FLAG_SUITEB_128_LOS:
1745 *psigs = suiteb_sigalgs;
7a531ee4 1746 return OSSL_NELEM(suiteb_sigalgs);
0f113f3e
MC		 1747
1748 case SSL_CERT_FLAG_SUITEB_128_LOS_ONLY:
1749 *psigs = suiteb_sigalgs;
7a531ee4 1750 return 1;
0f113f3e
MC		 1751
1752 case SSL_CERT_FLAG_SUITEB_192_LOS:
7a531ee4
MC		 1753 *psigs = suiteb_sigalgs + 1;
1754 return 1;
0f113f3e 1755 }
a9669ddc
DSH		 1756 /*
1757 * We use client_sigalgs (if not NULL) if we're a server
1758 * and sending a certificate request or if we're a client and
1759 * determining which shared algorithm to use.
1760 */
1761 if ((s->server == sent) && s->cert->client_sigalgs != NULL) {
0f113f3e
MC		 1762 *psigs = s->cert->client_sigalgs;
1763 return s->cert->client_sigalgslen;
1764 } else if (s->cert->conf_sigalgs) {
1765 *psigs = s->cert->conf_sigalgs;
1766 return s->cert->conf_sigalgslen;
1767 } else {
ee58915c
MB		 1768 *psigs = SSL_CONNECTION_GET_CTX(s)->tls12_sigalgs;
1769 return SSL_CONNECTION_GET_CTX(s)->tls12_sigalgs_len;
0f113f3e
MC		 1770 }
1771}
1772
de4dc598
MC		 1773/*
1774 * Called by servers only. Checks that we have a sig alg that supports the
1775 * specified EC curve.
1776 */
38b051a1 1777int tls_check_sigalg_curve(const SSL_CONNECTION *s, int curve)
de4dc598
MC		 1778{
1779 const uint16_t *sigs;
1780 size_t siglen, i;
1781
1782 if (s->cert->conf_sigalgs) {
1783 sigs = s->cert->conf_sigalgs;
1784 siglen = s->cert->conf_sigalgslen;
1785 } else {
ee58915c
MB		 1786 sigs = SSL_CONNECTION_GET_CTX(s)->tls12_sigalgs;
1787 siglen = SSL_CONNECTION_GET_CTX(s)->tls12_sigalgs_len;
de4dc598
MC		 1788 }
1789
1790 for (i = 0; i < siglen; i++) {
263ff2c9 1791 const SIGALG_LOOKUP *lu = tls1_lookup_sigalg(s, sigs[i]);
de4dc598
MC		 1792
1793 if (lu == NULL)
1794 continue;
1795 if (lu->sig == EVP_PKEY_EC
1796 && lu->curve != NID_undef
1797 && curve == lu->curve)
1798 return 1;
1799 }
1800
1801 return 0;
1802}
1803
620c97b6
KR		 1804/*
1805 * Return the number of security bits for the signature algorithm, or 0 on
1806 * error.
1807 */
1808static int sigalg_security_bits(SSL_CTX *ctx, const SIGALG_LOOKUP *lu)
1809{
1810 const EVP_MD *md = NULL;
1811 int secbits = 0;
1812
1813 if (!tls1_lookup_md(ctx, lu, &md))
1814 return 0;
1815 if (md != NULL)
1816 {
ed576acd 1817 int md_type = EVP_MD_get_type(md);
aba03ae5 1818
620c97b6 1819 /* Security bits: half digest bits */
ed576acd 1820 secbits = EVP_MD_get_size(md) * 4;
aba03ae5
KR		 1821 /*
1822 * SHA1 and MD5 are known to be broken. Reduce security bits so that
1823 * they're no longer accepted at security level 1. The real values don't
1824 * really matter as long as they're lower than 80, which is our
1825 * security level 1.
1826 * https://eprint.iacr.org/2020/014 puts a chosen-prefix attack for
1827 * SHA1 at 2^63.4 and MD5+SHA1 at 2^67.2
1828 * https://documents.epfl.ch/users/l/le/lenstra/public/papers/lat.pdf
1829 * puts a chosen-prefix attack for MD5 at 2^39.
5ea4d764 1830 */
aba03ae5
KR		 1831 if (md_type == NID_sha1)
1832 secbits = 64;
1833 else if (md_type == NID_md5_sha1)
1834 secbits = 67;
1835 else if (md_type == NID_md5)
1836 secbits = 39;
620c97b6
KR		 1837 } else {
1838 /* Values from https://tools.ietf.org/html/rfc8032#section-8.5 */
1839 if (lu->sigalg == TLSEXT_SIGALG_ed25519)
1840 secbits = 128;
1841 else if (lu->sigalg == TLSEXT_SIGALG_ed448)
1842 secbits = 224;
1843 }
ee58915c
MB		 1844 /*
1845 * For provider-based sigalgs we have secbits information available
1846 * in the (provider-loaded) sigalg_list structure
1847 */
1848 if ((secbits == 0) && (lu->sig_idx >= SSL_PKEY_NUM)
1849 && ((lu->sig_idx - SSL_PKEY_NUM) < (int)ctx->sigalg_list_len)) {
1850 secbits = ctx->sigalg_list[lu->sig_idx - SSL_PKEY_NUM].secbits;
1851 }
620c97b6
KR		 1852 return secbits;
1853}
1854
0f113f3e
MC		 1855/*
1856 * Check signature algorithm is consistent with sent supported signature
b2eb6998
DSH		 1857 * algorithms and if so set relevant digest and signature scheme in
1858 * s.
ec4a50b3 1859 */
38b051a1 1860int tls12_check_peer_sigalg(SSL_CONNECTION *s, uint16_t sig, EVP_PKEY *pkey)
0f113f3e 1861{
98c792d1 1862 const uint16_t *sent_sigs;
5554facb 1863 const EVP_MD *md = NULL;
703bcee0 1864 char sigalgstr[2];
11d2641f 1865 size_t sent_sigslen, i, cidx;
c2041da8 1866 int pkeyid = -1;
f742cda8 1867 const SIGALG_LOOKUP *lu;
620c97b6 1868 int secbits = 0;
4d43ee28 1869
ed576acd 1870 pkeyid = EVP_PKEY_get_id(pkey);
ee58915c 1871
38b051a1 1872 if (SSL_CONNECTION_IS_TLS13(s)) {
5a8916d9
DSH		 1873 /* Disallow DSA for TLS 1.3 */
1874 if (pkeyid == EVP_PKEY_DSA) {
c48ffbcc 1875 SSLfatal(s, SSL_AD_ILLEGAL_PARAMETER, SSL_R_WRONG_SIGNATURE_TYPE);
5a8916d9
DSH		 1876 return 0;
1877 }
1878 /* Only allow PSS for TLS 1.3 */
1879 if (pkeyid == EVP_PKEY_RSA)
1880 pkeyid = EVP_PKEY_RSA_PSS;
1881 }
263ff2c9 1882 lu = tls1_lookup_sigalg(s, sig);
ee58915c 1883 /* if this sigalg is loaded, set so far unknown pkeyid to its sig NID */
a2a543e0 1884 if ((pkeyid == EVP_PKEY_KEYMGMT) && (lu != NULL))
ee58915c
MB		 1885 pkeyid = lu->sig;
1886
1887 /* Should never happen */
1888 if (pkeyid == -1)
1889 return -1;
1890
f742cda8 1891 /*
d8311fc9
MC		 1892 * Check sigalgs is known. Disallow SHA1/SHA224 with TLS 1.3. Check key type
1893 * is consistent with signature: RSA keys can be used for RSA-PSS
f742cda8 1894 */
d8311fc9 1895 if (lu == NULL
38b051a1
TM		 1896 || (SSL_CONNECTION_IS_TLS13(s)
1897 && (lu->hash == NID_sha1 || lu->hash == NID_sha224))
095a982b 1898 || (pkeyid != lu->sig
f742cda8 1899 && (lu->sig != EVP_PKEY_RSA_PSS || pkeyid != EVP_PKEY_RSA))) {
c48ffbcc 1900 SSLfatal(s, SSL_AD_ILLEGAL_PARAMETER, SSL_R_WRONG_SIGNATURE_TYPE);
0f113f3e
MC		 1901 return 0;
1902 }
11d2641f 1903 /* Check the sigalg is consistent with the key OID */
ee58915c
MB		 1904 if (!ssl_cert_lookup_by_nid(
1905 (pkeyid == EVP_PKEY_RSA_PSS) ? EVP_PKEY_get_id(pkey) : pkeyid,
1906 &cidx, SSL_CONNECTION_GET_CTX(s))
11d2641f 1907 || lu->sig_idx != (int)cidx) {
c48ffbcc 1908 SSLfatal(s, SSL_AD_ILLEGAL_PARAMETER, SSL_R_WRONG_SIGNATURE_TYPE);
11d2641f
MC		 1909 return 0;
1910 }
1911
fe3066ee 1912 if (pkeyid == EVP_PKEY_EC) {
44b6318f 1913
4a1b4280
DSH		 1914 /* Check point compression is permitted */
1915 if (!tls1_check_pkey_comp(s, pkey)) {
f63a17d6 1916 SSLfatal(s, SSL_AD_ILLEGAL_PARAMETER,
f63a17d6 1917 SSL_R_ILLEGAL_POINT_COMPRESSION);
4a1b4280
DSH		 1918 return 0;
1919 }
1920
1921 /* For TLS 1.3 or Suite B check curve matches signature algorithm */
38b051a1 1922 if (SSL_CONNECTION_IS_TLS13(s) || tls1_suiteb(s)) {
d8975dec 1923 int curve = ssl_get_EC_curve_nid(pkey);
4a1b4280 1924
a34a9df0 1925 if (lu->curve != NID_undef && curve != lu->curve) {
c48ffbcc 1926 SSLfatal(s, SSL_AD_ILLEGAL_PARAMETER, SSL_R_WRONG_CURVE);
8f88cb53
DSH		 1927 return 0;
1928 }
4a1b4280 1929 }
38b051a1 1930 if (!SSL_CONNECTION_IS_TLS13(s)) {
4a1b4280 1931 /* Check curve matches extensions */
dcf8b01f 1932 if (!tls1_check_group_id(s, tls1_get_group_id(pkey), 1)) {
c48ffbcc 1933 SSLfatal(s, SSL_AD_ILLEGAL_PARAMETER, SSL_R_WRONG_CURVE);
8f88cb53
DSH		 1934 return 0;
1935 }
8f88cb53 1936 if (tls1_suiteb(s)) {
f1adb006
DSH		 1937 /* Check sigalg matches a permissible Suite B value */
1938 if (sig != TLSEXT_SIGALG_ecdsa_secp256r1_sha256
1939 && sig != TLSEXT_SIGALG_ecdsa_secp384r1_sha384) {
f63a17d6 1940 SSLfatal(s, SSL_AD_HANDSHAKE_FAILURE,
f63a17d6 1941 SSL_R_WRONG_SIGNATURE_TYPE);
0f113f3e 1942 return 0;
f1adb006 1943 }
8f88cb53 1944 }
0f113f3e 1945 }
8f88cb53 1946 } else if (tls1_suiteb(s)) {
c48ffbcc 1947 SSLfatal(s, SSL_AD_HANDSHAKE_FAILURE, SSL_R_WRONG_SIGNATURE_TYPE);
0f113f3e 1948 return 0;
8f88cb53 1949 }
0f113f3e
MC		 1950
1951 /* Check signature matches a type we sent */
a9669ddc 1952 sent_sigslen = tls12_get_psigalgs(s, 1, &sent_sigs);
536199ec 1953 for (i = 0; i < sent_sigslen; i++, sent_sigs++) {
703bcee0 1954 if (sig == *sent_sigs)
0f113f3e
MC		 1955 break;
1956 }
1957 /* Allow fallback to SHA1 if not strict mode */
f742cda8
DSH		 1958 if (i == sent_sigslen && (lu->hash != NID_sha1
1959 || s->cert->cert_flags & SSL_CERT_FLAGS_CHECK_TLS_STRICT)) {
c48ffbcc 1960 SSLfatal(s, SSL_AD_HANDSHAKE_FAILURE, SSL_R_WRONG_SIGNATURE_TYPE);
0f113f3e
MC		 1961 return 0;
1962 }
38b051a1 1963 if (!tls1_lookup_md(SSL_CONNECTION_GET_CTX(s), lu, &md)) {
c48ffbcc 1964 SSLfatal(s, SSL_AD_HANDSHAKE_FAILURE, SSL_R_UNKNOWN_DIGEST);
f63a17d6 1965 return 0;
0f113f3e 1966 }
620c97b6
KR		 1967 /*
1968 * Make sure security callback allows algorithm. For historical
1969 * reasons we have to pass the sigalg as a two byte char array.
1970 */
1971 sigalgstr[0] = (sig >> 8) & 0xff;
1972 sigalgstr[1] = sig & 0xff;
38b051a1 1973 secbits = sigalg_security_bits(SSL_CONNECTION_GET_CTX(s), lu);
620c97b6
KR		 1974 if (secbits == 0 ||
1975 !ssl_security(s, SSL_SECOP_SIGALG_CHECK, secbits,
ed576acd 1976 md != NULL ? EVP_MD_get_type(md) : NID_undef,
620c97b6 1977 (void *)sigalgstr)) {
c48ffbcc 1978 SSLfatal(s, SSL_AD_HANDSHAKE_FAILURE, SSL_R_WRONG_SIGNATURE_TYPE);
620c97b6 1979 return 0;
0f113f3e 1980 }
6cbebb55 1981 /* Store the sigalg the peer uses */
555cbb32 1982 s->s3.tmp.peer_sigalg = lu;
0f113f3e
MC		 1983 return 1;
1984}
2ea80354 1985
42ef7aea
DSH		 1986int SSL_get_peer_signature_type_nid(const SSL *s, int *pnid)
1987{
38b051a1
TM		 1988 const SSL_CONNECTION *sc = SSL_CONNECTION_FROM_CONST_SSL(s);
1989
1990 if (sc == NULL)
42ef7aea 1991 return 0;
38b051a1
TM		 1992
1993 if (sc->s3.tmp.peer_sigalg == NULL)
1994 return 0;
1995 *pnid = sc->s3.tmp.peer_sigalg->sig;
42ef7aea
DSH		 1996 return 1;
1997}
1998
a51c9f63
VD		 1999int SSL_get_signature_type_nid(const SSL *s, int *pnid)
2000{
38b051a1
TM		 2001 const SSL_CONNECTION *sc = SSL_CONNECTION_FROM_CONST_SSL(s);
2002
2003 if (sc == NULL)
2004 return 0;
2005
2006 if (sc->s3.tmp.sigalg == NULL)
a51c9f63 2007 return 0;
38b051a1 2008 *pnid = sc->s3.tmp.sigalg->sig;
a51c9f63
VD		 2009 return 1;
2010}
2011
0f113f3e 2012/*
3eb2aff4
KR		 2013 * Set a mask of disabled algorithms: an algorithm is disabled if it isn't
2014 * supported, doesn't appear in supported signature algorithms, isn't supported
2015 * by the enabled protocol versions or by the security level.
2016 *
2017 * This function should only be used for checking which ciphers are supported
2018 * by the client.
2019 *
2020 * Call ssl_cipher_disabled() to check that it's enabled or not.
b7bfe69b 2021 */
38b051a1 2022int ssl_set_client_disabled(SSL_CONNECTION *s)
0f113f3e 2023{
555cbb32
TS		 2024 s->s3.tmp.mask_a = 0;
2025 s->s3.tmp.mask_k = 0;
2026 ssl_set_sig_mask(&s->s3.tmp.mask_a, s, SSL_SECOP_SIGALG_MASK);
2027 if (ssl_get_min_max_version(s, &s->s3.tmp.min_ver,
2028 &s->s3.tmp.max_ver, NULL) != 0)
1d0c08b4 2029 return 0;
a230b26e 2030#ifndef OPENSSL_NO_PSK
0f113f3e
MC		 2031 /* with PSK there must be client callback set */
2032 if (!s->psk_client_callback) {
555cbb32
TS		 2033 s->s3.tmp.mask_a |= SSL_aPSK;
2034 s->s3.tmp.mask_k |= SSL_PSK;
0f113f3e 2035 }
a230b26e 2036#endif /* OPENSSL_NO_PSK */
e481f9b9 2037#ifndef OPENSSL_NO_SRP
0f113f3e 2038 if (!(s->srp_ctx.srp_Mask & SSL_kSRP)) {
555cbb32
TS		 2039 s->s3.tmp.mask_a |= SSL_aSRP;
2040 s->s3.tmp.mask_k |= SSL_kSRP;
0f113f3e 2041 }
e481f9b9 2042#endif
1d0c08b4 2043 return 1;
0f113f3e 2044}
fc101f88 2045
3eb2aff4
KR		 2046/*
2047 * ssl_cipher_disabled - check that a cipher is disabled or not
2048 * @s: SSL connection that you want to use the cipher on
2049 * @c: cipher to check
2050 * @op: Security check that you want to do
8af91fd9 2051 * @ecdhe: If set to 1 then TLSv1 ECDHE ciphers are also allowed in SSLv3
3eb2aff4
KR		 2052 *
2053 * Returns 1 when it's disabled, 0 when enabled.
2054 */
38b051a1
TM		 2055int ssl_cipher_disabled(const SSL_CONNECTION *s, const SSL_CIPHER *c,
2056 int op, int ecdhe)
0f113f3e 2057{
6fd37948
FWH		 2058 int minversion = SSL_CONNECTION_IS_DTLS(s) ? c->min_dtls : c->min_tls;
2059 int maxversion = SSL_CONNECTION_IS_DTLS(s) ? c->max_dtls : c->max_tls;
2060
555cbb32
TS		 2061 if (c->algorithm_mkey & s->s3.tmp.mask_k
2062 || c->algorithm_auth & s->s3.tmp.mask_a)
0f113f3e 2063 return 1;
555cbb32 2064 if (s->s3.tmp.max_ver == 0)
3eb2aff4 2065 return 1;
09d56d20
HL		 2066
2067 if (SSL_IS_QUIC_HANDSHAKE(s))
2068 /* For QUIC, only allow these ciphersuites. */
2069 switch (SSL_CIPHER_get_id(c)) {
2070 case TLS1_3_CK_AES_128_GCM_SHA256:
2071 case TLS1_3_CK_AES_256_GCM_SHA384:
2072 case TLS1_3_CK_CHACHA20_POLY1305_SHA256:
2073 break;
2074 default:
2075 return 1;
2076 }
2077
6fd37948
FWH		 2078 /*
2079 * For historical reasons we will allow ECHDE to be selected by a server
2080 * in SSLv3 if we are a client
2081 */
2082 if (minversion == TLS1_VERSION
2083 && ecdhe
2084 && (c->algorithm_mkey & (SSL_kECDHE | SSL_kECDHEPSK)) != 0)
2085 minversion = SSL3_VERSION;
8af91fd9 2086
6fd37948
FWH		 2087 if (ssl_version_cmp(s, minversion, s->s3.tmp.max_ver) > 0
2088 || ssl_version_cmp(s, maxversion, s->s3.tmp.min_ver) < 0)
3eb2aff4
KR		 2089 return 1;
2090
0f113f3e
MC		 2091 return !ssl_security(s, op, c->strength_bits, 0, (void *)c);
2092}
b362ccab 2093
38b051a1 2094int tls_use_ticket(SSL_CONNECTION *s)
0f113f3e 2095{
08191294 2096 if ((s->options & SSL_OP_NO_TICKET))
0f113f3e
MC		 2097 return 0;
2098 return ssl_security(s, SSL_SECOP_TICKET, 0, 0, NULL);
2099}
ed3883d2 2100
38b051a1 2101int tls1_set_server_sigalgs(SSL_CONNECTION *s)
0f113f3e 2102{
0f113f3e 2103 size_t i;
8483a003
F		 2104
2105 /* Clear any shared signature algorithms */
29948ac8
BK		 2106 OPENSSL_free(s->shared_sigalgs);
2107 s->shared_sigalgs = NULL;
2108 s->shared_sigalgslen = 0;
ee58915c 2109
9195ddcd 2110 /* Clear certificate validity flags */
ee58915c
MB		 2111 if (s->s3.tmp.valid_flags)
2112 memset(s->s3.tmp.valid_flags, 0, s->ssl_pkey_num * sizeof(uint32_t));
2113 else
2114 s->s3.tmp.valid_flags = OPENSSL_zalloc(s->ssl_pkey_num * sizeof(uint32_t));
2115 if (s->s3.tmp.valid_flags == NULL)
2116 return 0;
a8bb912d
DSH		 2117 /*
2118 * If peer sent no signature algorithms check to see if we support
2119 * the default algorithm for each certificate type
2120 */
555cbb32
TS		 2121 if (s->s3.tmp.peer_cert_sigalgs == NULL
2122 && s->s3.tmp.peer_sigalgs == NULL) {
a8bb912d
DSH		 2123 const uint16_t *sent_sigs;
2124 size_t sent_sigslen = tls12_get_psigalgs(s, 1, &sent_sigs);
0f113f3e 2125
ee58915c 2126 for (i = 0; i < s->ssl_pkey_num; i++) {
a8bb912d
DSH		 2127 const SIGALG_LOOKUP *lu = tls1_get_legacy_sigalg(s, i);
2128 size_t j;
2129
2130 if (lu == NULL)
2131 continue;
2132 /* Check default matches a type we sent */
2133 for (j = 0; j < sent_sigslen; j++) {
2134 if (lu->sigalg == sent_sigs[j]) {
555cbb32 2135 s->s3.tmp.valid_flags[i] = CERT_PKEY_SIGN;
a8bb912d
DSH		 2136 break;
2137 }
2138 }
2139 }
9195ddcd 2140 return 1;
a8bb912d 2141 }
9195ddcd
DSH		 2142
2143 if (!tls1_process_sigalgs(s)) {
c48ffbcc 2144 SSLfatal(s, SSL_AD_INTERNAL_ERROR, ERR_R_INTERNAL_ERROR);
f63a17d6 2145 return 0;
d376e57d 2146 }
29948ac8 2147 if (s->shared_sigalgs != NULL)
9195ddcd 2148 return 1;
f63a17d6 2149
fb34a0f4 2150 /* Fatal error if no shared signature algorithms */
c48ffbcc 2151 SSLfatal(s, SSL_AD_HANDSHAKE_FAILURE,
f63a17d6 2152 SSL_R_NO_SHARED_SIGNATURE_ALGORITHMS);
0f113f3e
MC		 2153 return 0;
2154}
e469af8d 2155
1d97c843 2156/*-
1ab3836b 2157 * Gets the ticket information supplied by the client if any.
e7f0d921 2158 *
1ab3836b 2159 * hello: The parsed ClientHello data
c519e89f
BM		 2160 * ret: (output) on return, if a ticket was decrypted, then this is set to
2161 * point to the resulting session.
6434abbf 2162 */
38b051a1
TM		 2163SSL_TICKET_STATUS tls_get_ticket_from_client(SSL_CONNECTION *s,
2164 CLIENTHELLO_MSG *hello,
df0fed9a 2165 SSL_SESSION **ret)
0f113f3e 2166{
1ab3836b
MC		 2167 size_t size;
2168 RAW_EXTENSION *ticketext;
e7f0d921 2169
0f113f3e 2170 *ret = NULL;
aff8c126 2171 s->ext.ticket_expected = 0;
0f113f3e
MC		 2172
2173 /*
9362c93e
MC		 2174 * If tickets disabled or not supported by the protocol version
2175 * (e.g. TLSv1.3) behave as if no ticket present to permit stateful
0f113f3e
MC		 2176 * resumption.
2177 */
1ab3836b 2178 if (s->version <= SSL3_VERSION || !tls_use_ticket(s))
df0fed9a 2179 return SSL_TICKET_NONE;
9ceb2426 2180
70af3d8e
MC		 2181 ticketext = &hello->pre_proc_exts[TLSEXT_IDX_session_ticket];
2182 if (!ticketext->present)
df0fed9a 2183 return SSL_TICKET_NONE;
1ab3836b
MC		 2184
2185 size = PACKET_remaining(&ticketext->data);
70af3d8e 2186
c0638ade 2187 return tls_decrypt_ticket(s, PACKET_data(&ticketext->data), size,
70af3d8e 2188 hello->session_id, hello->session_id_len, ret);
1ab3836b
MC		 2189}
2190
1d97c843
TH		 2191/*-
2192 * tls_decrypt_ticket attempts to decrypt a session ticket.
c519e89f 2193 *
61fb5923
MC		 2194 * If s->tls_session_secret_cb is set and we're not doing TLSv1.3 then we are
2195 * expecting a pre-shared key ciphersuite, in which case we have no use for
2196 * session tickets and one will never be decrypted, nor will
2197 * s->ext.ticket_expected be set to 1.
2198 *
2199 * Side effects:
2200 * Sets s->ext.ticket_expected to 1 if the server will have to issue
2201 * a new session ticket to the client because the client indicated support
2202 * (and s->tls_session_secret_cb is NULL) but the client either doesn't have
2203 * a session ticket or we couldn't use the one it gave us, or if
2204 * s->ctx->ext.ticket_key_cb asked to renew the client's ticket.
2205 * Otherwise, s->ext.ticket_expected is set to 0.
2206 *
c519e89f 2207 * etick: points to the body of the session ticket extension.
8483a003 2208 * eticklen: the length of the session tickets extension.
c519e89f
BM		 2209 * sess_id: points at the session ID.
2210 * sesslen: the length of the session ID.
2211 * psess: (output) on return, if a ticket was decrypted, then this is set to
2212 * point to the resulting session.
c519e89f 2213 */
38b051a1
TM		 2214SSL_TICKET_STATUS tls_decrypt_ticket(SSL_CONNECTION *s,
2215 const unsigned char *etick,
2216 size_t eticklen,
2217 const unsigned char *sess_id,
df0fed9a 2218 size_t sesslen, SSL_SESSION **psess)
0f113f3e 2219{
61fb5923 2220 SSL_SESSION *sess = NULL;
0f113f3e
MC		 2221 unsigned char *sdec;
2222 const unsigned char *p;
83ab43da 2223 int slen, ivlen, renew_ticket = 0, declen;
61fb5923 2224 SSL_TICKET_STATUS ret = SSL_TICKET_FATAL_ERR_OTHER;
348240c6 2225 size_t mlen;
0f113f3e 2226 unsigned char tick_hmac[EVP_MAX_MD_SIZE];
a76ce286 2227 SSL_HMAC *hctx = NULL;
ee763495 2228 EVP_CIPHER_CTX *ctx = NULL;
222da979 2229 SSL_CTX *tctx = s->session_ctx;
3c95ef22 2230 SSL_CTX *sctx = SSL_CONNECTION_GET_CTX(s);
e97763c9 2231
61fb5923
MC		 2232 if (eticklen == 0) {
2233 /*
2234 * The client will accept a ticket but doesn't currently have
2235 * one (TLSv1.2 and below), or treated as a fatal error in TLSv1.3
2236 */
2237 ret = SSL_TICKET_EMPTY;
2238 goto end;
2239 }
38b051a1 2240 if (!SSL_CONNECTION_IS_TLS13(s) && s->ext.session_secret_cb) {
61fb5923
MC		 2241 /*
2242 * Indicate that the ticket couldn't be decrypted rather than
2243 * generating the session from ticket now, trigger
2244 * abbreviated handshake based on external mechanism to
2245 * calculate the master secret later.
2246 */
2247 ret = SSL_TICKET_NO_DECRYPT;
2248 goto end;
2249 }
2250
ee763495
MC		 2251 /* Need at least keyname + iv */
2252 if (eticklen < TLSEXT_KEYNAME_LENGTH + EVP_MAX_IV_LENGTH) {
df0fed9a 2253 ret = SSL_TICKET_NO_DECRYPT;
c0638ade 2254 goto end;
ee763495
MC		 2255 }
2256
0f113f3e 2257 /* Initialize session ticket encryption and HMAC contexts */
a76ce286 2258 hctx = ssl_hmac_new(tctx);
c0638ade
MC		 2259 if (hctx == NULL) {
2260 ret = SSL_TICKET_FATAL_ERR_MALLOC;
2261 goto end;
2262 }
846ec07d 2263 ctx = EVP_CIPHER_CTX_new();
35b1a433 2264 if (ctx == NULL) {
df0fed9a 2265 ret = SSL_TICKET_FATAL_ERR_MALLOC;
c0638ade 2266 goto end;
35b1a433 2267 }
a76ce286
P		 2268#ifndef OPENSSL_NO_DEPRECATED_3_0
2269 if (tctx->ext.ticket_key_evp_cb != NULL || tctx->ext.ticket_key_cb != NULL)
2270#else
2271 if (tctx->ext.ticket_key_evp_cb != NULL)
2272#endif
2273 {
0f113f3e 2274 unsigned char *nctick = (unsigned char *)etick;
a76ce286
P		 2275 int rv = 0;
2276
2277 if (tctx->ext.ticket_key_evp_cb != NULL)
38b051a1 2278 rv = tctx->ext.ticket_key_evp_cb(SSL_CONNECTION_GET_SSL(s), nctick,
a76ce286
P		 2279 nctick + TLSEXT_KEYNAME_LENGTH,
2280 ctx,
2281 ssl_hmac_get0_EVP_MAC_CTX(hctx),
2282 0);
2283#ifndef OPENSSL_NO_DEPRECATED_3_0
2284 else if (tctx->ext.ticket_key_cb != NULL)
2285 /* if 0 is returned, write an empty ticket */
38b051a1 2286 rv = tctx->ext.ticket_key_cb(SSL_CONNECTION_GET_SSL(s), nctick,
ee763495 2287 nctick + TLSEXT_KEYNAME_LENGTH,
a76ce286
P		 2288 ctx, ssl_hmac_get0_HMAC_CTX(hctx), 0);
2289#endif
c0638ade
MC		 2290 if (rv < 0) {
2291 ret = SSL_TICKET_FATAL_ERR_OTHER;
2292 goto end;
2293 }
35b1a433 2294 if (rv == 0) {
df0fed9a 2295 ret = SSL_TICKET_NO_DECRYPT;
c0638ade 2296 goto end;
35b1a433 2297 }
0f113f3e
MC		 2298 if (rv == 2)
2299 renew_ticket = 1;
2300 } else {
148bfd26
MC		 2301 EVP_CIPHER *aes256cbc = NULL;
2302
0f113f3e 2303 /* Check key name matches */
aff8c126 2304 if (memcmp(etick, tctx->ext.tick_key_name,
ee763495 2305 TLSEXT_KEYNAME_LENGTH) != 0) {
df0fed9a 2306 ret = SSL_TICKET_NO_DECRYPT;
c0638ade 2307 goto end;
35b1a433 2308 }
148bfd26 2309
38b051a1
TM		 2310 aes256cbc = EVP_CIPHER_fetch(sctx->libctx, "AES-256-CBC",
2311 sctx->propq);
148bfd26
MC		 2312 if (aes256cbc == NULL
2313 || ssl_hmac_init(hctx, tctx->ext.secure->tick_hmac_key,
2314 sizeof(tctx->ext.secure->tick_hmac_key),
2315 "SHA256") <= 0
2316 || EVP_DecryptInit_ex(ctx, aes256cbc, NULL,
4bfb96f2 2317 tctx->ext.secure->tick_aes_key,
ee763495 2318 etick + TLSEXT_KEYNAME_LENGTH) <= 0) {
148bfd26 2319 EVP_CIPHER_free(aes256cbc);
c0638ade
MC		 2320 ret = SSL_TICKET_FATAL_ERR_OTHER;
2321 goto end;
a230b26e 2322 }
148bfd26 2323 EVP_CIPHER_free(aes256cbc);
38b051a1 2324 if (SSL_CONNECTION_IS_TLS13(s))
c0638ade 2325 renew_ticket = 1;
0f113f3e
MC		 2326 }
2327 /*
2328 * Attempt to process session ticket, first conduct sanity and integrity
2329 * checks on ticket.
2330 */
a76ce286 2331 mlen = ssl_hmac_size(hctx);
348240c6 2332 if (mlen == 0) {
c0638ade
MC		 2333 ret = SSL_TICKET_FATAL_ERR_OTHER;
2334 goto end;
0f113f3e 2335 }
c0638ade 2336
83ab43da
DB		 2337 ivlen = EVP_CIPHER_CTX_get_iv_length(ctx);
2338 if (ivlen < 0) {
2339 ret = SSL_TICKET_FATAL_ERR_OTHER;
2340 goto end;
2341 }
2342
e97763c9 2343 /* Sanity check ticket length: must exceed keyname + IV + HMAC */
83ab43da 2344 if (eticklen <= TLSEXT_KEYNAME_LENGTH + ivlen + mlen) {
df0fed9a 2345 ret = SSL_TICKET_NO_DECRYPT;
c0638ade 2346 goto end;
e97763c9 2347 }
0f113f3e
MC		 2348 eticklen -= mlen;
2349 /* Check HMAC of encrypted ticket */
a76ce286
P		 2350 if (ssl_hmac_update(hctx, etick, eticklen) <= 0
2351 || ssl_hmac_final(hctx, tick_hmac, NULL, sizeof(tick_hmac)) <= 0) {
c0638ade
MC		 2352 ret = SSL_TICKET_FATAL_ERR_OTHER;
2353 goto end;
5f3d93e4 2354 }
c0638ade 2355
0f113f3e 2356 if (CRYPTO_memcmp(tick_hmac, etick + eticklen, mlen)) {
c0638ade
MC		 2357 ret = SSL_TICKET_NO_DECRYPT;
2358 goto end;
0f113f3e
MC		 2359 }
2360 /* Attempt to decrypt session data */
2361 /* Move p after IV to start of encrypted ticket, update length */
83ab43da
DB		 2362 p = etick + TLSEXT_KEYNAME_LENGTH + ivlen;
2363 eticklen -= TLSEXT_KEYNAME_LENGTH + ivlen;
0f113f3e 2364 sdec = OPENSSL_malloc(eticklen);
348240c6
MC		 2365 if (sdec == NULL || EVP_DecryptUpdate(ctx, sdec, &slen, p,
2366 (int)eticklen) <= 0) {
d1247df2 2367 OPENSSL_free(sdec);
c0638ade
MC		 2368 ret = SSL_TICKET_FATAL_ERR_OTHER;
2369 goto end;
0f113f3e 2370 }
348240c6 2371 if (EVP_DecryptFinal(ctx, sdec + slen, &declen) <= 0) {
0f113f3e 2372 OPENSSL_free(sdec);
c0638ade
MC		 2373 ret = SSL_TICKET_NO_DECRYPT;
2374 goto end;
0f113f3e 2375 }
348240c6 2376 slen += declen;
0f113f3e
MC		 2377 p = sdec;
2378
3c95ef22 2379 sess = d2i_SSL_SESSION_ex(NULL, &p, slen, sctx->libctx, sctx->propq);
d3bc9805 2380 slen -= p - sdec;
0f113f3e
MC		 2381 OPENSSL_free(sdec);
2382 if (sess) {
79020b27 2383 /* Some additional consistency checks */
32305f88 2384 if (slen != 0) {
79020b27 2385 SSL_SESSION_free(sess);
5f96a95e 2386 sess = NULL;
c0638ade
MC		 2387 ret = SSL_TICKET_NO_DECRYPT;
2388 goto end;
79020b27 2389 }
0f113f3e
MC		 2390 /*
2391 * The session ID, if non-empty, is used by some clients to detect
2392 * that the ticket has been accepted. So we copy it to the session
2393 * structure. If it is empty set length to zero as required by
2394 * standard.
2395 */
32305f88 2396 if (sesslen) {
0f113f3e 2397 memcpy(sess->session_id, sess_id, sesslen);
32305f88
MC		 2398 sess->session_id_length = sesslen;
2399 }
0f113f3e 2400 if (renew_ticket)
c0638ade 2401 ret = SSL_TICKET_SUCCESS_RENEW;
0f113f3e 2402 else
c0638ade
MC		 2403 ret = SSL_TICKET_SUCCESS;
2404 goto end;
0f113f3e
MC		 2405 }
2406 ERR_clear_error();
2407 /*
2408 * For session parse failure, indicate that we need to send a new ticket.
2409 */
c0638ade
MC		 2410 ret = SSL_TICKET_NO_DECRYPT;
2411
2412 end:
846ec07d 2413 EVP_CIPHER_CTX_free(ctx);
a76ce286 2414 ssl_hmac_free(hctx);
c0638ade
MC		 2415
2416 /*
61fb5923
MC		 2417 * If set, the decrypt_ticket_cb() is called unless a fatal error was
2418 * detected above. The callback is responsible for checking |ret| before it
2419 * performs any action
c0638ade 2420 */
61fb5923
MC		 2421 if (s->session_ctx->decrypt_ticket_cb != NULL
2422 && (ret == SSL_TICKET_EMPTY
2423 || ret == SSL_TICKET_NO_DECRYPT
2424 || ret == SSL_TICKET_SUCCESS
2425 || ret == SSL_TICKET_SUCCESS_RENEW)) {
c0638ade 2426 size_t keyname_len = eticklen;
61fb5923 2427 int retcb;
c0638ade
MC		 2428
2429 if (keyname_len > TLSEXT_KEYNAME_LENGTH)
2430 keyname_len = TLSEXT_KEYNAME_LENGTH;
38b051a1
TM		 2431 retcb = s->session_ctx->decrypt_ticket_cb(SSL_CONNECTION_GET_SSL(s),
2432 sess, etick, keyname_len,
61fb5923
MC		 2433 ret,
2434 s->session_ctx->ticket_cb_data);
2435 switch (retcb) {
2436 case SSL_TICKET_RETURN_ABORT:
2437 ret = SSL_TICKET_FATAL_ERR_OTHER;
2438 break;
2439
2440 case SSL_TICKET_RETURN_IGNORE:
2441 ret = SSL_TICKET_NONE;
2442 SSL_SESSION_free(sess);
2443 sess = NULL;
2444 break;
2445
2446 case SSL_TICKET_RETURN_IGNORE_RENEW:
2447 if (ret != SSL_TICKET_EMPTY && ret != SSL_TICKET_NO_DECRYPT)
2448 ret = SSL_TICKET_NO_DECRYPT;
2449 /* else the value of |ret| will already do the right thing */
2450 SSL_SESSION_free(sess);
2451 sess = NULL;
2452 break;
2453
2454 case SSL_TICKET_RETURN_USE:
2455 case SSL_TICKET_RETURN_USE_RENEW:
2456 if (ret != SSL_TICKET_SUCCESS
2457 && ret != SSL_TICKET_SUCCESS_RENEW)
2458 ret = SSL_TICKET_FATAL_ERR_OTHER;
2459 else if (retcb == SSL_TICKET_RETURN_USE)
2460 ret = SSL_TICKET_SUCCESS;
2461 else
2462 ret = SSL_TICKET_SUCCESS_RENEW;
2463 break;
2464
2465 default:
2466 ret = SSL_TICKET_FATAL_ERR_OTHER;
2467 }
c0638ade
MC		 2468 }
2469
38b051a1 2470 if (s->ext.session_secret_cb == NULL || SSL_CONNECTION_IS_TLS13(s)) {
309371d6
MC		 2471 switch (ret) {
2472 case SSL_TICKET_NO_DECRYPT:
2473 case SSL_TICKET_SUCCESS_RENEW:
2474 case SSL_TICKET_EMPTY:
2475 s->ext.ticket_expected = 1;
2476 }
c0638ade
MC		 2477 }
2478
61fb5923
MC		 2479 *psess = sess;
2480
2481 return ret;
0f113f3e 2482}
6434abbf 2483
b362ccab 2484/* Check to see if a signature algorithm is allowed */
38b051a1
TM		 2485static int tls12_sigalg_allowed(const SSL_CONNECTION *s, int op,
2486 const SIGALG_LOOKUP *lu)
0f113f3e 2487{
703bcee0 2488 unsigned char sigalgstr[2];
44b6318f 2489 int secbits;
703bcee0 2490
263ff2c9 2491 if (lu == NULL || !lu->enabled)
0f113f3e 2492 return 0;
224b4e37 2493 /* DSA is not allowed in TLS 1.3 */
38b051a1 2494 if (SSL_CONNECTION_IS_TLS13(s) && lu->sig == EVP_PKEY_DSA)
224b4e37 2495 return 0;
08cea586
MC		 2496 /*
2497 * At some point we should fully axe DSA/etc. in ClientHello as per TLS 1.3
2498 * spec
2499 */
38b051a1
TM		 2500 if (!s->server && !SSL_CONNECTION_IS_DTLS(s)
2501 && s->s3.tmp.min_ver >= TLS1_3_VERSION
6ffeb269
BK		 2502 && (lu->sig == EVP_PKEY_DSA || lu->hash_idx == SSL_MD_SHA1_IDX
2503 || lu->hash_idx == SSL_MD_MD5_IDX
2504 || lu->hash_idx == SSL_MD_SHA224_IDX))
2505 return 0;
871980a9 2506
0f113f3e 2507 /* See if public key algorithm allowed */
38b051a1 2508 if (ssl_cert_is_disabled(SSL_CONNECTION_GET_CTX(s), lu->sig_idx))
0f113f3e 2509 return 0;
871980a9
MC		 2510
2511 if (lu->sig == NID_id_GostR3410_2012_256
2512 || lu->sig == NID_id_GostR3410_2012_512
2513 || lu->sig == NID_id_GostR3410_2001) {
2514 /* We never allow GOST sig algs on the server with TLSv1.3 */
38b051a1 2515 if (s->server && SSL_CONNECTION_IS_TLS13(s))
871980a9
MC		 2516 return 0;
2517 if (!s->server
38b051a1 2518 && SSL_CONNECTION_GET_SSL(s)->method->version == TLS_ANY_VERSION
555cbb32 2519 && s->s3.tmp.max_ver >= TLS1_3_VERSION) {
871980a9
MC		 2520 int i, num;
2521 STACK_OF(SSL_CIPHER) *sk;
2522
2523 /*
2524 * We're a client that could negotiate TLSv1.3. We only allow GOST
2525 * sig algs if we could negotiate TLSv1.2 or below and we have GOST
2526 * ciphersuites enabled.
2527 */
2528
555cbb32 2529 if (s->s3.tmp.min_ver >= TLS1_3_VERSION)
871980a9
MC		 2530 return 0;
2531
38b051a1 2532 sk = SSL_get_ciphers(SSL_CONNECTION_GET_SSL(s));
871980a9
MC		 2533 num = sk != NULL ? sk_SSL_CIPHER_num(sk) : 0;
2534 for (i = 0; i < num; i++) {
2535 const SSL_CIPHER *c;
2536
2537 c = sk_SSL_CIPHER_value(sk, i);
2538 /* Skip disabled ciphers */
2539 if (ssl_cipher_disabled(s, c, SSL_SECOP_CIPHER_SUPPORTED, 0))
2540 continue;
2541
5a5530a2 2542 if ((c->algorithm_mkey & (SSL_kGOST | SSL_kGOST18)) != 0)
871980a9
MC		 2543 break;
2544 }
2545 if (i == num)
2546 return 0;
2547 }
2548 }
2549
0f113f3e 2550 /* Finally see if security callback allows it */
38b051a1 2551 secbits = sigalg_security_bits(SSL_CONNECTION_GET_CTX(s), lu);
b0e9ab95
DSH		 2552 sigalgstr[0] = (lu->sigalg >> 8) & 0xff;
2553 sigalgstr[1] = lu->sigalg & 0xff;
44b6318f 2554 return ssl_security(s, op, secbits, lu->hash, (void *)sigalgstr);
0f113f3e
MC		 2555}
2556
2557/*
2558 * Get a mask of disabled public key algorithms based on supported signature
2559 * algorithms. For example if no signature algorithm supports RSA then RSA is
2560 * disabled.
b362ccab
DSH		 2561 */
2562
38b051a1 2563void ssl_set_sig_mask(uint32_t *pmask_a, SSL_CONNECTION *s, int op)
0f113f3e 2564{
98c792d1 2565 const uint16_t *sigalgs;
0f113f3e 2566 size_t i, sigalgslen;
13cc2574 2567 uint32_t disabled_mask = SSL_aRSA | SSL_aDSS | SSL_aECDSA;
0f113f3e 2568 /*
13cc2574
DSH		 2569 * Go through all signature algorithms seeing if we support any
2570 * in disabled_mask.
0f113f3e 2571 */
a9669ddc 2572 sigalgslen = tls12_get_psigalgs(s, 1, &sigalgs);
b2555168 2573 for (i = 0; i < sigalgslen; i++, sigalgs++) {
263ff2c9 2574 const SIGALG_LOOKUP *lu = tls1_lookup_sigalg(s, *sigalgs);
13cc2574 2575 const SSL_CERT_LOOKUP *clu;
b0e9ab95
DSH		 2576
2577 if (lu == NULL)
2578 continue;
13cc2574 2579
ee58915c
MB		 2580 clu = ssl_cert_lookup_by_idx(lu->sig_idx,
2581 SSL_CONNECTION_GET_CTX(s));
dd6b2706
P		 2582 if (clu == NULL)
2583 continue;
13cc2574
DSH		 2584
2585 /* If algorithm is disabled see if we can enable it */
2586 if ((clu->amask & disabled_mask) != 0
2587 && tls12_sigalg_allowed(s, op, lu))
2588 disabled_mask &= ~clu->amask;
0f113f3e 2589 }
13cc2574 2590 *pmask_a |= disabled_mask;
0f113f3e 2591}
b362ccab 2592
38b051a1 2593int tls12_copy_sigalgs(SSL_CONNECTION *s, WPACKET *pkt,
98c792d1 2594 const uint16_t *psig, size_t psiglen)
2c7b4dbc
MC		 2595{
2596 size_t i;
b0e9ab95 2597 int rv = 0;
c0f9e23c 2598
703bcee0 2599 for (i = 0; i < psiglen; i++, psig++) {
263ff2c9 2600 const SIGALG_LOOKUP *lu = tls1_lookup_sigalg(s, *psig);
b0e9ab95 2601
54e3efff
MC		 2602 if (lu == NULL
2603 || !tls12_sigalg_allowed(s, SSL_SECOP_SIGALG_SUPPORTED, lu))
b0e9ab95
DSH		 2604 continue;
2605 if (!WPACKET_put_bytes_u16(pkt, *psig))
2606 return 0;
2607 /*
2608 * If TLS 1.3 must have at least one valid TLS 1.3 message
d8311fc9 2609 * signing algorithm: i.e. neither RSA nor SHA1/SHA224
b0e9ab95 2610 */
38b051a1 2611 if (rv == 0 && (!SSL_CONNECTION_IS_TLS13(s)
d8311fc9
MC		 2612 || (lu->sig != EVP_PKEY_RSA
2613 && lu->hash != NID_sha1
2614 && lu->hash != NID_sha224)))
b0e9ab95 2615 rv = 1;
2c7b4dbc 2616 }
5528d68f 2617 if (rv == 0)
6849b73c 2618 ERR_raise(ERR_LIB_SSL, SSL_R_NO_SUITABLE_SIGNATURE_ALGORITHM);
b0e9ab95 2619 return rv;
2c7b4dbc
MC		 2620}
2621
4453cd8c 2622/* Given preference and allowed sigalgs set shared sigalgs */
38b051a1
TM		 2623static size_t tls12_shared_sigalgs(SSL_CONNECTION *s,
2624 const SIGALG_LOOKUP **shsig,
98c792d1
DSH		 2625 const uint16_t *pref, size_t preflen,
2626 const uint16_t *allow, size_t allowlen)
0f113f3e 2627{
98c792d1 2628 const uint16_t *ptmp, *atmp;
0f113f3e 2629 size_t i, j, nmatch = 0;
703bcee0 2630 for (i = 0, ptmp = pref; i < preflen; i++, ptmp++) {
263ff2c9 2631 const SIGALG_LOOKUP *lu = tls1_lookup_sigalg(s, *ptmp);
b0e9ab95 2632
0f113f3e 2633 /* Skip disabled hashes or signature algorithms */
54e3efff
MC		 2634 if (lu == NULL
2635 || !tls12_sigalg_allowed(s, SSL_SECOP_SIGALG_SHARED, lu))
0f113f3e 2636 continue;
703bcee0
MC		 2637 for (j = 0, atmp = allow; j < allowlen; j++, atmp++) {
2638 if (*ptmp == *atmp) {
0f113f3e 2639 nmatch++;
b0e9ab95
DSH		 2640 if (shsig)
2641 *shsig++ = lu;
0f113f3e
MC		 2642 break;
2643 }
2644 }
2645 }
2646 return nmatch;
2647}
4453cd8c
DSH		 2648
2649/* Set shared signature algorithms for SSL structures */
38b051a1 2650static int tls1_set_shared_sigalgs(SSL_CONNECTION *s)
0f113f3e 2651{
98c792d1 2652 const uint16_t *pref, *allow, *conf;
0f113f3e
MC		 2653 size_t preflen, allowlen, conflen;
2654 size_t nmatch;
4d43ee28 2655 const SIGALG_LOOKUP **salgs = NULL;
0f113f3e
MC		 2656 CERT *c = s->cert;
2657 unsigned int is_suiteb = tls1_suiteb(s);
b548a1f1 2658
29948ac8
BK		 2659 OPENSSL_free(s->shared_sigalgs);
2660 s->shared_sigalgs = NULL;
2661 s->shared_sigalgslen = 0;
0f113f3e
MC		 2662 /* If client use client signature algorithms if not NULL */
2663 if (!s->server && c->client_sigalgs && !is_suiteb) {
2664 conf = c->client_sigalgs;
2665 conflen = c->client_sigalgslen;
2666 } else if (c->conf_sigalgs && !is_suiteb) {
2667 conf = c->conf_sigalgs;
2668 conflen = c->conf_sigalgslen;
2669 } else
a9669ddc 2670 conflen = tls12_get_psigalgs(s, 0, &conf);
0f113f3e
MC		 2671 if (s->options & SSL_OP_CIPHER_SERVER_PREFERENCE || is_suiteb) {
2672 pref = conf;
2673 preflen = conflen;
555cbb32
TS		 2674 allow = s->s3.tmp.peer_sigalgs;
2675 allowlen = s->s3.tmp.peer_sigalgslen;
0f113f3e
MC		 2676 } else {
2677 allow = conf;
2678 allowlen = conflen;
555cbb32
TS		 2679 pref = s->s3.tmp.peer_sigalgs;
2680 preflen = s->s3.tmp.peer_sigalgslen;
0f113f3e
MC		 2681 }
2682 nmatch = tls12_shared_sigalgs(s, NULL, pref, preflen, allow, allowlen);
34e3edbf 2683 if (nmatch) {
e077455e 2684 if ((salgs = OPENSSL_malloc(nmatch * sizeof(*salgs))) == NULL)
34e3edbf
DSH		 2685 return 0;
2686 nmatch = tls12_shared_sigalgs(s, salgs, pref, preflen, allow, allowlen);
2687 } else {
2688 salgs = NULL;
2689 }
29948ac8
BK		 2690 s->shared_sigalgs = salgs;
2691 s->shared_sigalgslen = nmatch;
0f113f3e
MC		 2692 return 1;
2693}
4453cd8c 2694
9e84a42d 2695int tls1_save_u16(PACKET *pkt, uint16_t **pdest, size_t *pdestlen)
0f113f3e 2696{
98c792d1 2697 unsigned int stmp;
703bcee0 2698 size_t size, i;
9e84a42d 2699 uint16_t *buf;
0f113f3e 2700
703bcee0
MC		 2701 size = PACKET_remaining(pkt);
2702
2703 /* Invalid data length */
8f12296e 2704 if (size == 0 || (size & 1) != 0)
703bcee0
MC		 2705 return 0;
2706
2707 size >>= 1;
2708
e077455e 2709 if ((buf = OPENSSL_malloc(size * sizeof(*buf))) == NULL)
0f113f3e 2710 return 0;
98c792d1 2711 for (i = 0; i < size && PACKET_get_net_2(pkt, &stmp); i++)
9e84a42d 2712 buf[i] = stmp;
703bcee0 2713
9e84a42d
DSH		 2714 if (i != size) {
2715 OPENSSL_free(buf);
703bcee0 2716 return 0;
9e84a42d
DSH		 2717 }
2718
2719 OPENSSL_free(*pdest);
2720 *pdest = buf;
2721 *pdestlen = size;
703bcee0 2722
0f113f3e
MC		 2723 return 1;
2724}
6b7be581 2725
38b051a1 2726int tls1_save_sigalgs(SSL_CONNECTION *s, PACKET *pkt, int cert)
9e84a42d
DSH		 2727{
2728 /* Extension ignored for inappropriate versions */
2729 if (!SSL_USE_SIGALGS(s))
2730 return 1;
2731 /* Should never happen */
2732 if (s->cert == NULL)
2733 return 0;
2734
c589c34e 2735 if (cert)
555cbb32
TS		 2736 return tls1_save_u16(pkt, &s->s3.tmp.peer_cert_sigalgs,
2737 &s->s3.tmp.peer_cert_sigalgslen);
c589c34e 2738 else
555cbb32
TS		 2739 return tls1_save_u16(pkt, &s->s3.tmp.peer_sigalgs,
2740 &s->s3.tmp.peer_sigalgslen);
9e84a42d 2741
9e84a42d
DSH		 2742}
2743
2744/* Set preferred digest for each key type */
2745
38b051a1 2746int tls1_process_sigalgs(SSL_CONNECTION *s)
0f113f3e 2747{
0f113f3e 2748 size_t i;
555cbb32 2749 uint32_t *pvalid = s->s3.tmp.valid_flags;
4d43ee28 2750
0f113f3e
MC		 2751 if (!tls1_set_shared_sigalgs(s))
2752 return 0;
2753
ee58915c 2754 for (i = 0; i < s->ssl_pkey_num; i++)
9195ddcd
DSH		 2755 pvalid[i] = 0;
2756
29948ac8
BK		 2757 for (i = 0; i < s->shared_sigalgslen; i++) {
2758 const SIGALG_LOOKUP *sigptr = s->shared_sigalgs[i];
9195ddcd 2759 int idx = sigptr->sig_idx;
4d43ee28 2760
523fb323 2761 /* Ignore PKCS1 based sig algs in TLSv1.3 */
38b051a1 2762 if (SSL_CONNECTION_IS_TLS13(s) && sigptr->sig == EVP_PKEY_RSA)
523fb323 2763 continue;
9195ddcd 2764 /* If not disabled indicate we can explicitly sign */
38b051a1
TM		 2765 if (pvalid[idx] == 0
2766 && !ssl_cert_is_disabled(SSL_CONNECTION_GET_CTX(s), idx))
b8858aec 2767 pvalid[idx] = CERT_PKEY_EXPLICIT_SIGN | CERT_PKEY_SIGN;
0f113f3e
MC		 2768 }
2769 return 1;
2770}
4817504d 2771
e7f8ff43 2772int SSL_get_sigalgs(SSL *s, int idx,
0f113f3e
MC		 2773 int *psign, int *phash, int *psignhash,
2774 unsigned char *rsig, unsigned char *rhash)
2775{
38b051a1
TM		 2776 uint16_t *psig;
2777 size_t numsigalgs;
2778 SSL_CONNECTION *sc = SSL_CONNECTION_FROM_SSL(s);
2779
2780 if (sc == NULL)
2781 return 0;
2782
2783 psig = sc->s3.tmp.peer_sigalgs;
2784 numsigalgs = sc->s3.tmp.peer_sigalgslen;
2785
348240c6 2786 if (psig == NULL || numsigalgs > INT_MAX)
0f113f3e
MC		 2787 return 0;
2788 if (idx >= 0) {
4d43ee28
DSH		 2789 const SIGALG_LOOKUP *lu;
2790
703bcee0 2791 if (idx >= (int)numsigalgs)
0f113f3e
MC		 2792 return 0;
2793 psig += idx;
4d43ee28 2794 if (rhash != NULL)
536199ec 2795 *rhash = (unsigned char)((*psig >> 8) & 0xff);
4d43ee28 2796 if (rsig != NULL)
536199ec 2797 *rsig = (unsigned char)(*psig & 0xff);
38b051a1 2798 lu = tls1_lookup_sigalg(sc, *psig);
4d43ee28
DSH		 2799 if (psign != NULL)
2800 *psign = lu != NULL ? lu->sig : NID_undef;
2801 if (phash != NULL)
2802 *phash = lu != NULL ? lu->hash : NID_undef;
2803 if (psignhash != NULL)
2804 *psignhash = lu != NULL ? lu->sigandhash : NID_undef;
0f113f3e 2805 }
348240c6 2806 return (int)numsigalgs;
0f113f3e 2807}
4453cd8c
DSH		 2808
2809int SSL_get_shared_sigalgs(SSL *s, int idx,
0f113f3e
MC		 2810 int *psign, int *phash, int *psignhash,
2811 unsigned char *rsig, unsigned char *rhash)
2812{
4d43ee28 2813 const SIGALG_LOOKUP *shsigalgs;
38b051a1
TM		 2814 SSL_CONNECTION *sc = SSL_CONNECTION_FROM_SSL(s);
2815
2816 if (sc == NULL)
2817 return 0;
2818
2819 if (sc->shared_sigalgs == NULL
6d047e06 2820 || idx < 0
38b051a1
TM		 2821 || idx >= (int)sc->shared_sigalgslen
2822 || sc->shared_sigalgslen > INT_MAX)
0f113f3e 2823 return 0;
38b051a1 2824 shsigalgs = sc->shared_sigalgs[idx];
4d43ee28
DSH		 2825 if (phash != NULL)
2826 *phash = shsigalgs->hash;
2827 if (psign != NULL)
2828 *psign = shsigalgs->sig;
2829 if (psignhash != NULL)
2830 *psignhash = shsigalgs->sigandhash;
2831 if (rsig != NULL)
2832 *rsig = (unsigned char)(shsigalgs->sigalg & 0xff);
2833 if (rhash != NULL)
2834 *rhash = (unsigned char)((shsigalgs->sigalg >> 8) & 0xff);
38b051a1 2835 return (int)sc->shared_sigalgslen;
0f113f3e
MC		 2836}
2837
787ebcaf
DSH		 2838/* Maximum possible number of unique entries in sigalgs array */
2839#define TLS_MAX_SIGALGCNT (OSSL_NELEM(sigalg_lookup_tbl) * 2)
0f229cce 2840
0f113f3e
MC		 2841typedef struct {
2842 size_t sigalgcnt;
fd5e1a8c
BK		 2843 /* TLSEXT_SIGALG_XXX values */
2844 uint16_t sigalgs[TLS_MAX_SIGALGCNT];
0f113f3e 2845} sig_cb_st;
0f229cce 2846
431f458d
DSH		 2847static void get_sigorhash(int *psig, int *phash, const char *str)
2848{
2849 if (strcmp(str, "RSA") == 0) {
2850 *psig = EVP_PKEY_RSA;
b2eb6998
DSH		 2851 } else if (strcmp(str, "RSA-PSS") == 0 || strcmp(str, "PSS") == 0) {
2852 *psig = EVP_PKEY_RSA_PSS;
431f458d
DSH		 2853 } else if (strcmp(str, "DSA") == 0) {
2854 *psig = EVP_PKEY_DSA;
2855 } else if (strcmp(str, "ECDSA") == 0) {
2856 *psig = EVP_PKEY_EC;
2857 } else {
2858 *phash = OBJ_sn2nid(str);
2859 if (*phash == NID_undef)
2860 *phash = OBJ_ln2nid(str);
2861 }
2862}
787ebcaf
DSH		 2863/* Maximum length of a signature algorithm string component */
2864#define TLS_MAX_SIGSTRING_LEN 40
431f458d 2865
0f229cce 2866static int sig_cb(const char *elem, int len, void *arg)
0f113f3e
MC		 2867{
2868 sig_cb_st *sarg = arg;
2869 size_t i;
fd5e1a8c 2870 const SIGALG_LOOKUP *s;
787ebcaf 2871 char etmp[TLS_MAX_SIGSTRING_LEN], *p;
431f458d 2872 int sig_alg = NID_undef, hash_alg = NID_undef;
2747d73c
KR		 2873 if (elem == NULL)
2874 return 0;
787ebcaf 2875 if (sarg->sigalgcnt == TLS_MAX_SIGALGCNT)
0f113f3e
MC		 2876 return 0;
2877 if (len > (int)(sizeof(etmp) - 1))
2878 return 0;
2879 memcpy(etmp, elem, len);
2880 etmp[len] = 0;
2881 p = strchr(etmp, '+');
fd5e1a8c
BK		 2882 /*
2883 * We only allow SignatureSchemes listed in the sigalg_lookup_tbl;
2884 * if there's no '+' in the provided name, look for the new-style combined
2885 * name. If not, match both sig+hash to find the needed SIGALG_LOOKUP.
2886 * Just sig+hash is not unique since TLS 1.3 adds rsa_pss_pss_* and
2887 * rsa_pss_rsae_* that differ only by public key OID; in such cases
2888 * we will pick the _rsae_ variant, by virtue of them appearing earlier
2889 * in the table.
2890 */
8a43a42a 2891 if (p == NULL) {
8a43a42a
DSH		 2892 for (i = 0, s = sigalg_lookup_tbl; i < OSSL_NELEM(sigalg_lookup_tbl);
2893 i++, s++) {
2894 if (s->name != NULL && strcmp(etmp, s->name) == 0) {
fd5e1a8c 2895 sarg->sigalgs[sarg->sigalgcnt++] = s->sigalg;
8a43a42a
DSH		 2896 break;
2897 }
2898 }
fd5e1a8c
BK		 2899 if (i == OSSL_NELEM(sigalg_lookup_tbl))
2900 return 0;
8a43a42a
DSH		 2901 } else {
2902 *p = 0;
2903 p++;
2904 if (*p == 0)
2905 return 0;
2906 get_sigorhash(&sig_alg, &hash_alg, etmp);
2907 get_sigorhash(&sig_alg, &hash_alg, p);
fd5e1a8c
BK		 2908 if (sig_alg == NID_undef || hash_alg == NID_undef)
2909 return 0;
2910 for (i = 0, s = sigalg_lookup_tbl; i < OSSL_NELEM(sigalg_lookup_tbl);
2911 i++, s++) {
2912 if (s->hash == hash_alg && s->sig == sig_alg) {
2913 sarg->sigalgs[sarg->sigalgcnt++] = s->sigalg;
2914 break;
2915 }
2916 }
2917 if (i == OSSL_NELEM(sigalg_lookup_tbl))
2918 return 0;
8a43a42a 2919 }
0f113f3e 2920
fd5e1a8c
BK		 2921 /* Reject duplicates */
2922 for (i = 0; i < sarg->sigalgcnt - 1; i++) {
c1acef92 2923 if (sarg->sigalgs[i] == sarg->sigalgs[sarg->sigalgcnt - 1]) {
fd5e1a8c 2924 sarg->sigalgcnt--;
0f113f3e 2925 return 0;
fd5e1a8c 2926 }
0f113f3e 2927 }
0f113f3e
MC		 2928 return 1;
2929}
2930
2931/*
9d22666e 2932 * Set supported signature algorithms based on a colon separated list of the
0f113f3e
MC		 2933 * form sig+hash e.g. RSA+SHA512:DSA+SHA512
2934 */
3dbc46df 2935int tls1_set_sigalgs_list(CERT *c, const char *str, int client)
0f113f3e
MC		 2936{
2937 sig_cb_st sig;
2938 sig.sigalgcnt = 0;
2939 if (!CONF_parse_list(str, ':', 1, sig_cb, &sig))
2940 return 0;
2941 if (c == NULL)
2942 return 1;
fd5e1a8c
BK		 2943 return tls1_set_raw_sigalgs(c, sig.sigalgs, sig.sigalgcnt, client);
2944}
2945
2946int tls1_set_raw_sigalgs(CERT *c, const uint16_t *psigs, size_t salglen,
2947 int client)
2948{
2949 uint16_t *sigalgs;
2950
e077455e 2951 if ((sigalgs = OPENSSL_malloc(salglen * sizeof(*sigalgs))) == NULL)
fd5e1a8c
BK		 2952 return 0;
2953 memcpy(sigalgs, psigs, salglen * sizeof(*sigalgs));
2954
2955 if (client) {
2956 OPENSSL_free(c->client_sigalgs);
2957 c->client_sigalgs = sigalgs;
2958 c->client_sigalgslen = salglen;
2959 } else {
2960 OPENSSL_free(c->conf_sigalgs);
2961 c->conf_sigalgs = sigalgs;
2962 c->conf_sigalgslen = salglen;
2963 }
2964
2965 return 1;
0f113f3e
MC		 2966}
2967
a230b26e 2968int tls1_set_sigalgs(CERT *c, const int *psig_nids, size_t salglen, int client)
0f113f3e 2969{
98c792d1 2970 uint16_t *sigalgs, *sptr;
0f113f3e 2971 size_t i;
63c1df09 2972
0f113f3e
MC		 2973 if (salglen & 1)
2974 return 0;
e077455e 2975 if ((sigalgs = OPENSSL_malloc((salglen / 2) * sizeof(*sigalgs))) == NULL)
0f113f3e
MC		 2976 return 0;
2977 for (i = 0, sptr = sigalgs; i < salglen; i += 2) {
63c1df09 2978 size_t j;
7a531ee4 2979 const SIGALG_LOOKUP *curr;
63c1df09
MC		 2980 int md_id = *psig_nids++;
2981 int sig_id = *psig_nids++;
2982
2983 for (j = 0, curr = sigalg_lookup_tbl; j < OSSL_NELEM(sigalg_lookup_tbl);
2984 j++, curr++) {
fe3066ee 2985 if (curr->hash == md_id && curr->sig == sig_id) {
63c1df09
MC		 2986 *sptr++ = curr->sigalg;
2987 break;
2988 }
2989 }
0f113f3e 2990
63c1df09 2991 if (j == OSSL_NELEM(sigalg_lookup_tbl))
0f113f3e 2992 goto err;
0f113f3e
MC		 2993 }
2994
2995 if (client) {
b548a1f1 2996 OPENSSL_free(c->client_sigalgs);
0f113f3e 2997 c->client_sigalgs = sigalgs;
7a531ee4 2998 c->client_sigalgslen = salglen / 2;
0f113f3e 2999 } else {
b548a1f1 3000 OPENSSL_free(c->conf_sigalgs);
0f113f3e 3001 c->conf_sigalgs = sigalgs;
7a531ee4 3002 c->conf_sigalgslen = salglen / 2;
0f113f3e
MC		 3003 }
3004
3005 return 1;
3006
3007 err:
3008 OPENSSL_free(sigalgs);
3009 return 0;
3010}
4453cd8c 3011
38b051a1 3012static int tls1_check_sig_alg(SSL_CONNECTION *s, X509 *x, int default_nid)
0f113f3e 3013{
5235ef44 3014 int sig_nid, use_pc_sigalgs = 0;
0f113f3e 3015 size_t i;
5235ef44
MC		 3016 const SIGALG_LOOKUP *sigalg;
3017 size_t sigalgslen;
38b051a1 3018
0f113f3e
MC		 3019 if (default_nid == -1)
3020 return 1;
3021 sig_nid = X509_get_signature_nid(x);
3022 if (default_nid)
3023 return sig_nid == default_nid ? 1 : 0;
5235ef44 3024
38b051a1 3025 if (SSL_CONNECTION_IS_TLS13(s) && s->s3.tmp.peer_cert_sigalgs != NULL) {
5235ef44
MC		 3026 /*
3027 * If we're in TLSv1.3 then we only get here if we're checking the
3028 * chain. If the peer has specified peer_cert_sigalgs then we use them
3029 * otherwise we default to normal sigalgs.
3030 */
3031 sigalgslen = s->s3.tmp.peer_cert_sigalgslen;
3032 use_pc_sigalgs = 1;
3033 } else {
3034 sigalgslen = s->shared_sigalgslen;
3035 }
3036 for (i = 0; i < sigalgslen; i++) {
3037 sigalg = use_pc_sigalgs
263ff2c9 3038 ? tls1_lookup_sigalg(s, s->s3.tmp.peer_cert_sigalgs[i])
5235ef44 3039 : s->shared_sigalgs[i];
a87f3fe0 3040 if (sigalg != NULL && sig_nid == sigalg->sigandhash)
0f113f3e 3041 return 1;
5235ef44 3042 }
0f113f3e
MC		 3043 return 0;
3044}
3045
6dbb6219
DSH		 3046/* Check to see if a certificate issuer name matches list of CA names */
3047static int ssl_check_ca_name(STACK_OF(X509_NAME) *names, X509 *x)
0f113f3e 3048{
8cc86b81 3049 const X509_NAME *nm;
0f113f3e
MC		 3050 int i;
3051 nm = X509_get_issuer_name(x);
3052 for (i = 0; i < sk_X509_NAME_num(names); i++) {
3053 if (!X509_NAME_cmp(nm, sk_X509_NAME_value(names, i)))
3054 return 1;
3055 }
3056 return 0;
3057}
3058
3059/*
3060 * Check certificate chain is consistent with TLS extensions and is usable by
3061 * server. This servers two purposes: it allows users to check chains before
3062 * passing them to the server and it allows the server to check chains before
3063 * attempting to use them.
d61ff83b 3064 */
6dbb6219 3065
69687aa8 3066/* Flags which need to be set for a certificate when strict mode not set */
6dbb6219 3067
e481f9b9 3068#define CERT_PKEY_VALID_FLAGS \
0f113f3e 3069 (CERT_PKEY_EE_SIGNATURE|CERT_PKEY_EE_PARAM)
6dbb6219 3070/* Strict mode flags */
e481f9b9 3071#define CERT_PKEY_STRICT_FLAGS \
0f113f3e
MC		 3072 (CERT_PKEY_VALID_FLAGS|CERT_PKEY_CA_SIGNATURE|CERT_PKEY_CA_PARAM \
3073 | CERT_PKEY_ISSUER_NAME|CERT_PKEY_CERT_TYPE)
6dbb6219 3074
38b051a1
TM		 3075int tls1_check_chain(SSL_CONNECTION *s, X509 *x, EVP_PKEY *pk,
3076 STACK_OF(X509) *chain, int idx)
0f113f3e
MC		 3077{
3078 int i;
3079 int rv = 0;
3080 int check_flags = 0, strict_mode;
3081 CERT_PKEY *cpk = NULL;
3082 CERT *c = s->cert;
f7d53487 3083 uint32_t *pvalid;
0f113f3e 3084 unsigned int suiteb_flags = tls1_suiteb(s);
38b051a1 3085
3c95ef22
TS		 3086 /*
3087 * Meaning of idx:
3088 * idx == -1 means SSL_check_chain() invocation
3089 * idx == -2 means checking client certificate chains
3090 * idx >= 0 means checking SSL_PKEY index
3091 *
3092 * For RPK, where there may be no cert, we ignore -1
3093 */
0f113f3e 3094 if (idx != -1) {
0f113f3e
MC		 3095 if (idx == -2) {
3096 cpk = c->key;
348240c6 3097 idx = (int)(cpk - c->pkeys);
0f113f3e
MC		 3098 } else
3099 cpk = c->pkeys + idx;
555cbb32 3100 pvalid = s->s3.tmp.valid_flags + idx;
0f113f3e
MC		 3101 x = cpk->x509;
3102 pk = cpk->privatekey;
3103 chain = cpk->chain;
3104 strict_mode = c->cert_flags & SSL_CERT_FLAGS_CHECK_TLS_STRICT;
3c95ef22
TS		 3105 if (tls12_rpk_and_privkey(s, idx)) {
3106 if (EVP_PKEY_is_a(pk, "EC") && !tls1_check_pkey_comp(s, pk))
3107 return 0;
3108 *pvalid = rv = CERT_PKEY_RPK;
3109 return rv;
3110 }
0f113f3e 3111 /* If no cert or key, forget it */
3c95ef22 3112 if (x == NULL || pk == NULL)
0f113f3e 3113 goto end;
0f113f3e 3114 } else {
52fd27f9
DSH		 3115 size_t certidx;
3116
3c95ef22 3117 if (x == NULL || pk == NULL)
d813f9eb 3118 return 0;
52fd27f9 3119
ee58915c
MB		 3120 if (ssl_cert_lookup_by_pkey(pk, &certidx,
3121 SSL_CONNECTION_GET_CTX(s)) == NULL)
d813f9eb 3122 return 0;
52fd27f9 3123 idx = certidx;
555cbb32 3124 pvalid = s->s3.tmp.valid_flags + idx;
6383d316 3125
0f113f3e
MC		 3126 if (c->cert_flags & SSL_CERT_FLAGS_CHECK_TLS_STRICT)
3127 check_flags = CERT_PKEY_STRICT_FLAGS;
3128 else
3129 check_flags = CERT_PKEY_VALID_FLAGS;
3130 strict_mode = 1;
3131 }
3132
3133 if (suiteb_flags) {
3134 int ok;
3135 if (check_flags)
3136 check_flags |= CERT_PKEY_SUITEB;
3137 ok = X509_chain_check_suiteb(NULL, x, chain, suiteb_flags);
3138 if (ok == X509_V_OK)
3139 rv |= CERT_PKEY_SUITEB;
3140 else if (!check_flags)
3141 goto end;
3142 }
3143
3144 /*
3145 * Check all signature algorithms are consistent with signature
3146 * algorithms extension if TLS 1.2 or later and strict mode.
3147 */
38b051a1
TM		 3148 if (TLS1_get_version(SSL_CONNECTION_GET_SSL(s)) >= TLS1_2_VERSION
3149 && strict_mode) {
0f113f3e 3150 int default_nid;
536199ec 3151 int rsign = 0;
38b051a1 3152
555cbb32
TS		 3153 if (s->s3.tmp.peer_cert_sigalgs != NULL
3154 || s->s3.tmp.peer_sigalgs != NULL) {
0f113f3e
MC		 3155 default_nid = 0;
3156 /* If no sigalgs extension use defaults from RFC5246 */
c589c34e 3157 } else {
0f113f3e 3158 switch (idx) {
d0ff28f8 3159 case SSL_PKEY_RSA:
536199ec 3160 rsign = EVP_PKEY_RSA;
0f113f3e
MC		 3161 default_nid = NID_sha1WithRSAEncryption;
3162 break;
3163
3164 case SSL_PKEY_DSA_SIGN:
536199ec 3165 rsign = EVP_PKEY_DSA;
0f113f3e
MC		 3166 default_nid = NID_dsaWithSHA1;
3167 break;
3168
3169 case SSL_PKEY_ECC:
536199ec 3170 rsign = EVP_PKEY_EC;
0f113f3e
MC		 3171 default_nid = NID_ecdsa_with_SHA1;
3172 break;
3173
e44380a9 3174 case SSL_PKEY_GOST01:
536199ec 3175 rsign = NID_id_GostR3410_2001;
e44380a9
DB		 3176 default_nid = NID_id_GostR3411_94_with_GostR3410_2001;
3177 break;
3178
3179 case SSL_PKEY_GOST12_256:
536199ec 3180 rsign = NID_id_GostR3410_2012_256;
e44380a9
DB		 3181 default_nid = NID_id_tc26_signwithdigest_gost3410_2012_256;
3182 break;
3183
3184 case SSL_PKEY_GOST12_512:
536199ec 3185 rsign = NID_id_GostR3410_2012_512;
e44380a9
DB		 3186 default_nid = NID_id_tc26_signwithdigest_gost3410_2012_512;
3187 break;
3188
0f113f3e
MC		 3189 default:
3190 default_nid = -1;
3191 break;
3192 }
3193 }
3194 /*
3195 * If peer sent no signature algorithms extension and we have set
3196 * preferred signature algorithms check we support sha1.
3197 */
3198 if (default_nid > 0 && c->conf_sigalgs) {
3199 size_t j;
98c792d1 3200 const uint16_t *p = c->conf_sigalgs;
703bcee0 3201 for (j = 0; j < c->conf_sigalgslen; j++, p++) {
263ff2c9 3202 const SIGALG_LOOKUP *lu = tls1_lookup_sigalg(s, *p);
44b6318f
DSH		 3203
3204 if (lu != NULL && lu->hash == NID_sha1 && lu->sig == rsign)
0f113f3e
MC		 3205 break;
3206 }
3207 if (j == c->conf_sigalgslen) {
3208 if (check_flags)
3209 goto skip_sigs;
3210 else
3211 goto end;
3212 }
3213 }
3214 /* Check signature algorithm of each cert in chain */
38b051a1 3215 if (SSL_CONNECTION_IS_TLS13(s)) {
5235ef44
MC		 3216 /*
3217 * We only get here if the application has called SSL_check_chain(),
3218 * so check_flags is always set.
3219 */
3220 if (find_sig_alg(s, x, pk) != NULL)
3221 rv |= CERT_PKEY_EE_SIGNATURE;
3222 } else if (!tls1_check_sig_alg(s, x, default_nid)) {
0f113f3e
MC		 3223 if (!check_flags)
3224 goto end;
3225 } else
3226 rv |= CERT_PKEY_EE_SIGNATURE;
3227 rv |= CERT_PKEY_CA_SIGNATURE;
3228 for (i = 0; i < sk_X509_num(chain); i++) {
29948ac8 3229 if (!tls1_check_sig_alg(s, sk_X509_value(chain, i), default_nid)) {
0f113f3e
MC		 3230 if (check_flags) {
3231 rv &= ~CERT_PKEY_CA_SIGNATURE;
3232 break;
3233 } else
3234 goto end;
3235 }
3236 }
3237 }
3238 /* Else not TLS 1.2, so mark EE and CA signing algorithms OK */
3239 else if (check_flags)
3240 rv |= CERT_PKEY_EE_SIGNATURE | CERT_PKEY_CA_SIGNATURE;
3241 skip_sigs:
3242 /* Check cert parameters are consistent */
9195ddcd 3243 if (tls1_check_cert_param(s, x, 1))
0f113f3e
MC		 3244 rv |= CERT_PKEY_EE_PARAM;
3245 else if (!check_flags)
3246 goto end;
3247 if (!s->server)
3248 rv |= CERT_PKEY_CA_PARAM;
3249 /* In strict mode check rest of chain too */
3250 else if (strict_mode) {
3251 rv |= CERT_PKEY_CA_PARAM;
3252 for (i = 0; i < sk_X509_num(chain); i++) {
3253 X509 *ca = sk_X509_value(chain, i);
3254 if (!tls1_check_cert_param(s, ca, 0)) {
3255 if (check_flags) {
3256 rv &= ~CERT_PKEY_CA_PARAM;
3257 break;
3258 } else
3259 goto end;
3260 }
3261 }
3262 }
3263 if (!s->server && strict_mode) {
3264 STACK_OF(X509_NAME) *ca_dn;
3265 int check_type = 0;
c2041da8
RL		 3266
3267 if (EVP_PKEY_is_a(pk, "RSA"))
0f113f3e 3268 check_type = TLS_CT_RSA_SIGN;
c2041da8 3269 else if (EVP_PKEY_is_a(pk, "DSA"))
0f113f3e 3270 check_type = TLS_CT_DSS_SIGN;
c2041da8 3271 else if (EVP_PKEY_is_a(pk, "EC"))
0f113f3e 3272 check_type = TLS_CT_ECDSA_SIGN;
c2041da8 3273
0f113f3e 3274 if (check_type) {
555cbb32 3275 const uint8_t *ctypes = s->s3.tmp.ctype;
75c13e78
DSH		 3276 size_t j;
3277
555cbb32 3278 for (j = 0; j < s->s3.tmp.ctype_len; j++, ctypes++) {
75c13e78 3279 if (*ctypes == check_type) {
0f113f3e
MC		 3280 rv |= CERT_PKEY_CERT_TYPE;
3281 break;
3282 }
3283 }
3284 if (!(rv & CERT_PKEY_CERT_TYPE) && !check_flags)
3285 goto end;
75c13e78 3286 } else {
0f113f3e 3287 rv |= CERT_PKEY_CERT_TYPE;
75c13e78 3288 }
0f113f3e 3289
555cbb32 3290 ca_dn = s->s3.tmp.peer_ca_names;
0f113f3e 3291
89dd8543
TM		 3292 if (ca_dn == NULL
3293 || sk_X509_NAME_num(ca_dn) == 0
3294 || ssl_check_ca_name(ca_dn, x))
0f113f3e 3295 rv |= CERT_PKEY_ISSUER_NAME;
89dd8543 3296 else
0f113f3e
MC		 3297 for (i = 0; i < sk_X509_num(chain); i++) {
3298 X509 *xtmp = sk_X509_value(chain, i);
89dd8543 3299
0f113f3e
MC		 3300 if (ssl_check_ca_name(ca_dn, xtmp)) {
3301 rv |= CERT_PKEY_ISSUER_NAME;
3302 break;
3303 }
3304 }
89dd8543 3305
0f113f3e
MC		 3306 if (!check_flags && !(rv & CERT_PKEY_ISSUER_NAME))
3307 goto end;
3308 } else
3309 rv |= CERT_PKEY_ISSUER_NAME | CERT_PKEY_CERT_TYPE;
3310
3311 if (!check_flags || (rv & check_flags) == check_flags)
3312 rv |= CERT_PKEY_VALID;
3313
3314 end:
3315
38b051a1 3316 if (TLS1_get_version(SSL_CONNECTION_GET_SSL(s)) >= TLS1_2_VERSION)
a8bb912d
DSH		 3317 rv |= *pvalid & (CERT_PKEY_EXPLICIT_SIGN | CERT_PKEY_SIGN);
3318 else
0f113f3e
MC		 3319 rv |= CERT_PKEY_SIGN | CERT_PKEY_EXPLICIT_SIGN;
3320
3321 /*
3322 * When checking a CERT_PKEY structure all flags are irrelevant if the
3323 * chain is invalid.
3324 */
3325 if (!check_flags) {
a8bb912d 3326 if (rv & CERT_PKEY_VALID) {
6383d316 3327 *pvalid = rv;
a8bb912d
DSH		 3328 } else {
3329 /* Preserve sign and explicit sign flag, clear rest */
3330 *pvalid &= CERT_PKEY_EXPLICIT_SIGN | CERT_PKEY_SIGN;
0f113f3e
MC		 3331 return 0;
3332 }
3333 }
3334 return rv;
3335}
d61ff83b
DSH		 3336
3337/* Set validity of certificates in an SSL structure */
38b051a1 3338void tls1_set_cert_validity(SSL_CONNECTION *s)
0f113f3e 3339{
d0ff28f8 3340 tls1_check_chain(s, NULL, NULL, NULL, SSL_PKEY_RSA);
045d078a 3341 tls1_check_chain(s, NULL, NULL, NULL, SSL_PKEY_RSA_PSS_SIGN);
17dd65e6 3342 tls1_check_chain(s, NULL, NULL, NULL, SSL_PKEY_DSA_SIGN);
17dd65e6 3343 tls1_check_chain(s, NULL, NULL, NULL, SSL_PKEY_ECC);
e44380a9
DB		 3344 tls1_check_chain(s, NULL, NULL, NULL, SSL_PKEY_GOST01);
3345 tls1_check_chain(s, NULL, NULL, NULL, SSL_PKEY_GOST12_256);
3346 tls1_check_chain(s, NULL, NULL, NULL, SSL_PKEY_GOST12_512);
3d234c9e 3347 tls1_check_chain(s, NULL, NULL, NULL, SSL_PKEY_ED25519);
0e1d6ecf 3348 tls1_check_chain(s, NULL, NULL, NULL, SSL_PKEY_ED448);
0f113f3e
MC		 3349}
3350
69687aa8 3351/* User level utility function to check a chain is suitable */
18d71588 3352int SSL_check_chain(SSL *s, X509 *x, EVP_PKEY *pk, STACK_OF(X509) *chain)
0f113f3e 3353{
38b051a1
TM		 3354 SSL_CONNECTION *sc = SSL_CONNECTION_FROM_SSL(s);
3355
3356 if (sc == NULL)
3357 return 0;
3358
3359 return tls1_check_chain(sc, x, pk, chain, -1);
0f113f3e 3360}
d61ff83b 3361
38b051a1 3362EVP_PKEY *ssl_get_auto_dh(SSL_CONNECTION *s)
0f113f3e 3363{
091f6074
MC		 3364 EVP_PKEY *dhp = NULL;
3365 BIGNUM *p;
d7b5c648 3366 int dh_secbits = 80, sec_level_bits;
091f6074
MC		 3367 EVP_PKEY_CTX *pctx = NULL;
3368 OSSL_PARAM_BLD *tmpl = NULL;
3369 OSSL_PARAM *params = NULL;
38b051a1 3370 SSL_CTX *sctx = SSL_CONNECTION_GET_CTX(s);
091f6074 3371
7646610b
HK		 3372 if (s->cert->dh_tmp_auto != 2) {
3373 if (s->s3.tmp.new_cipher->algorithm_auth & (SSL_aNULL | SSL_aPSK)) {
3374 if (s->s3.tmp.new_cipher->strength_bits == 256)
3375 dh_secbits = 128;
3376 else
3377 dh_secbits = 80;
3378 } else {
3379 if (s->s3.tmp.cert == NULL)
3380 return NULL;
ed576acd 3381 dh_secbits = EVP_PKEY_get_security_bits(s->s3.tmp.cert->privatekey);
7646610b 3382 }
0f113f3e
MC		 3383 }
3384
d7b5c648 3385 /* Do not pick a prime that is too weak for the current security level */
38b051a1
TM		 3386 sec_level_bits = ssl_get_security_level_bits(SSL_CONNECTION_GET_SSL(s),
3387 NULL, NULL);
d7b5c648
P		 3388 if (dh_secbits < sec_level_bits)
3389 dh_secbits = sec_level_bits;
3390
7646610b
HK		 3391 if (dh_secbits >= 192)
3392 p = BN_get_rfc3526_prime_8192(NULL);
3393 else if (dh_secbits >= 152)
3394 p = BN_get_rfc3526_prime_4096(NULL);
3395 else if (dh_secbits >= 128)
3396 p = BN_get_rfc3526_prime_3072(NULL);
3397 else if (dh_secbits >= 112)
3398 p = BN_get_rfc3526_prime_2048(NULL);
3399 else
3400 p = BN_get_rfc2409_prime_1024(NULL);
091f6074
MC		 3401 if (p == NULL)
3402 goto err;
3403
38b051a1 3404 pctx = EVP_PKEY_CTX_new_from_name(sctx->libctx, "DH", sctx->propq);
091f6074 3405 if (pctx == NULL
2db985b7 3406 || EVP_PKEY_fromdata_init(pctx) != 1)
091f6074
MC		 3407 goto err;
3408
3409 tmpl = OSSL_PARAM_BLD_new();
3410 if (tmpl == NULL
3411 || !OSSL_PARAM_BLD_push_BN(tmpl, OSSL_PKEY_PARAM_FFC_P, p)
3412 || !OSSL_PARAM_BLD_push_uint(tmpl, OSSL_PKEY_PARAM_FFC_G, 2))
3413 goto err;
3414
3415 params = OSSL_PARAM_BLD_to_param(tmpl);
2db985b7
SL		 3416 if (params == NULL
3417 || EVP_PKEY_fromdata(pctx, &dhp, EVP_PKEY_KEY_PARAMETERS, params) != 1)
091f6074
MC		 3418 goto err;
3419
3420err:
3f883c7c 3421 OSSL_PARAM_free(params);
091f6074
MC		 3422 OSSL_PARAM_BLD_free(tmpl);
3423 EVP_PKEY_CTX_free(pctx);
3424 BN_free(p);
7646610b 3425 return dhp;
0f113f3e 3426}
b362ccab 3427
38b051a1
TM		 3428static int ssl_security_cert_key(SSL_CONNECTION *s, SSL_CTX *ctx, X509 *x,
3429 int op)
0f113f3e 3430{
72245f34 3431 int secbits = -1;
8382fd3a 3432 EVP_PKEY *pkey = X509_get0_pubkey(x);
38b051a1 3433
0f113f3e 3434 if (pkey) {
72245f34
DSH		 3435 /*
3436 * If no parameters this will return -1 and fail using the default
3437 * security callback for any non-zero security level. This will
3438 * reject keys which omit parameters but this only affects DSA and
3439 * omission of parameters is never (?) done in practice.
3440 */
ed576acd 3441 secbits = EVP_PKEY_get_security_bits(pkey);
72245f34 3442 }
38b051a1 3443 if (s != NULL)
0f113f3e
MC		 3444 return ssl_security(s, op, secbits, 0, x);
3445 else
3446 return ssl_ctx_security(ctx, op, secbits, 0, x);
3447}
b362ccab 3448
38b051a1
TM		 3449static int ssl_security_cert_sig(SSL_CONNECTION *s, SSL_CTX *ctx, X509 *x,
3450 int op)
0f113f3e
MC		 3451{
3452 /* Lookup signature algorithm digest */
65e89736 3453 int secbits, nid, pknid;
38b051a1 3454
221c7b55
DSH		 3455 /* Don't check signature if self signed */
3456 if ((X509_get_extension_flags(x) & EXFLAG_SS) != 0)
3457 return 1;
65e89736
DSH		 3458 if (!X509_get_signature_info(x, &nid, &pknid, &secbits, NULL))
3459 secbits = -1;
3460 /* If digest NID not defined use signature NID */
3461 if (nid == NID_undef)
3462 nid = pknid;
38b051a1 3463 if (s != NULL)
65e89736 3464 return ssl_security(s, op, secbits, nid, x);
0f113f3e 3465 else
65e89736 3466 return ssl_ctx_security(ctx, op, secbits, nid, x);
0f113f3e 3467}
b362ccab 3468
38b051a1
TM		 3469int ssl_security_cert(SSL_CONNECTION *s, SSL_CTX *ctx, X509 *x, int vfy,
3470 int is_ee)
0f113f3e
MC		 3471{
3472 if (vfy)
3473 vfy = SSL_SECOP_PEER;
3474 if (is_ee) {
3475 if (!ssl_security_cert_key(s, ctx, x, SSL_SECOP_EE_KEY | vfy))
3476 return SSL_R_EE_KEY_TOO_SMALL;
3477 } else {
3478 if (!ssl_security_cert_key(s, ctx, x, SSL_SECOP_CA_KEY | vfy))
3479 return SSL_R_CA_KEY_TOO_SMALL;
3480 }
3481 if (!ssl_security_cert_sig(s, ctx, x, SSL_SECOP_CA_MD | vfy))
3482 return SSL_R_CA_MD_TOO_WEAK;
3483 return 1;
3484}
3485
3486/*
69687aa8
F		 3487 * Check security of a chain, if |sk| includes the end entity certificate then
3488 * |x| is NULL. If |vfy| is 1 then we are verifying a peer chain and not sending
0f113f3e 3489 * one to the peer. Return values: 1 if ok otherwise error code to use
b362ccab
DSH		 3490 */
3491
38b051a1
TM		 3492int ssl_security_cert_chain(SSL_CONNECTION *s, STACK_OF(X509) *sk,
3493 X509 *x, int vfy)
0f113f3e
MC		 3494{
3495 int rv, start_idx, i;
38b051a1 3496
0f113f3e
MC		 3497 if (x == NULL) {
3498 x = sk_X509_value(sk, 0);
dc0ef292
BE		 3499 if (x == NULL)
3500 return ERR_R_INTERNAL_ERROR;
0f113f3e
MC		 3501 start_idx = 1;
3502 } else
3503 start_idx = 0;
3504
3505 rv = ssl_security_cert(s, NULL, x, vfy, 1);
3506 if (rv != 1)
3507 return rv;
3508
3509 for (i = start_idx; i < sk_X509_num(sk); i++) {
3510 x = sk_X509_value(sk, i);
3511 rv = ssl_security_cert(s, NULL, x, vfy, 0);
3512 if (rv != 1)
3513 return rv;
3514 }
3515 return 1;
3516}
93a77f9e 3517
7f6b466b
DSH		 3518/*
3519 * For TLS 1.2 servers check if we have a certificate which can be used
b46867d7 3520 * with the signature algorithm "lu" and return index of certificate.
7f6b466b
DSH		 3521 */
3522
38b051a1
TM		 3523static int tls12_get_cert_sigalg_idx(const SSL_CONNECTION *s,
3524 const SIGALG_LOOKUP *lu)
7f6b466b 3525{
b46867d7 3526 int sig_idx = lu->sig_idx;
ee58915c
MB		 3527 const SSL_CERT_LOOKUP *clu = ssl_cert_lookup_by_idx(sig_idx,
3528 SSL_CONNECTION_GET_CTX(s));
7f6b466b
DSH		 3529
3530 /* If not recognised or not supported by cipher mask it is not suitable */
b8fef8ee 3531 if (clu == NULL
555cbb32 3532 || (clu->amask & s->s3.tmp.new_cipher->algorithm_auth) == 0
b8fef8ee 3533 || (clu->nid == EVP_PKEY_RSA_PSS
555cbb32 3534 && (s->s3.tmp.new_cipher->algorithm_mkey & SSL_kRSA) != 0))
b46867d7
DSH		 3535 return -1;
3536
3c95ef22
TS		 3537 /* If doing RPK, the CERT_PKEY won't be "valid" */
3538 if (tls12_rpk_and_privkey(s, sig_idx))
3539 return s->s3.tmp.valid_flags[sig_idx] & CERT_PKEY_RPK ? sig_idx : -1;
3540
555cbb32 3541 return s->s3.tmp.valid_flags[sig_idx] & CERT_PKEY_VALID ? sig_idx : -1;
7f6b466b
DSH		 3542}
3543
c589c34e 3544/*
5235ef44
MC		 3545 * Checks the given cert against signature_algorithm_cert restrictions sent by
3546 * the peer (if any) as well as whether the hash from the sigalg is usable with
3547 * the key.
3548 * Returns true if the cert is usable and false otherwise.
c589c34e 3549 */
38b051a1
TM		 3550static int check_cert_usable(SSL_CONNECTION *s, const SIGALG_LOOKUP *sig,
3551 X509 *x, EVP_PKEY *pkey)
c589c34e
BK		 3552{
3553 const SIGALG_LOOKUP *lu;
ecbb2fca 3554 int mdnid, pknid, supported;
c589c34e 3555 size_t i;
e9fe0f7e 3556 const char *mdname = NULL;
38b051a1 3557 SSL_CTX *sctx = SSL_CONNECTION_GET_CTX(s);
c589c34e 3558
b5a27688 3559 /*
e9fe0f7e 3560 * If the given EVP_PKEY cannot support signing with this digest,
b5a27688
DW		 3561 * the answer is simply 'no'.
3562 */
e9fe0f7e
TM		 3563 if (sig->hash != NID_undef)
3564 mdname = OBJ_nid2sn(sig->hash);
38b051a1 3565 supported = EVP_PKEY_digestsign_supports_digest(pkey, sctx->libctx,
e9fe0f7e 3566 mdname,
38b051a1 3567 sctx->propq);
e9fe0f7e 3568 if (supported <= 0)
b5a27688
DW		 3569 return 0;
3570
3571 /*
3572 * The TLS 1.3 signature_algorithms_cert extension places restrictions
3573 * on the sigalg with which the certificate was signed (by its issuer).
3574 */
555cbb32 3575 if (s->s3.tmp.peer_cert_sigalgs != NULL) {
b5a27688
DW		 3576 if (!X509_get_signature_info(x, &mdnid, &pknid, NULL, NULL))
3577 return 0;
555cbb32 3578 for (i = 0; i < s->s3.tmp.peer_cert_sigalgslen; i++) {
263ff2c9 3579 lu = tls1_lookup_sigalg(s, s->s3.tmp.peer_cert_sigalgs[i]);
b5a27688 3580 if (lu == NULL)
c589c34e 3581 continue;
ecbb2fca 3582
5235ef44 3583 /*
407820c0 3584 * This does not differentiate between the
b5a27688
DW		 3585 * rsa_pss_pss_* and rsa_pss_rsae_* schemes since we do not
3586 * have a chain here that lets us look at the key OID in the
3587 * signing certificate.
5235ef44 3588 */
b5a27688
DW		 3589 if (mdnid == lu->hash && pknid == lu->sig)
3590 return 1;
c589c34e
BK		 3591 }
3592 return 0;
3593 }
b5a27688 3594
5235ef44 3595 /*
b5a27688
DW		 3596 * Without signat_algorithms_cert, any certificate for which we have
3597 * a viable public key is permitted.
5235ef44 3598 */
ecbb2fca 3599 return 1;
c589c34e
BK		 3600}
3601
5235ef44
MC		 3602/*
3603 * Returns true if |s| has a usable certificate configured for use
3604 * with signature scheme |sig|.
3605 * "Usable" includes a check for presence as well as applying
3606 * the signature_algorithm_cert restrictions sent by the peer (if any).
3607 * Returns false if no usable certificate is found.
3608 */
38b051a1 3609static int has_usable_cert(SSL_CONNECTION *s, const SIGALG_LOOKUP *sig, int idx)
5235ef44
MC		 3610{
3611 /* TLS 1.2 callers can override sig->sig_idx, but not TLS 1.3 callers. */
3612 if (idx == -1)
3613 idx = sig->sig_idx;
3614 if (!ssl_has_cert(s, idx))
3615 return 0;
3616
3617 return check_cert_usable(s, sig, s->cert->pkeys[idx].x509,
3618 s->cert->pkeys[idx].privatekey);
3619}
3620
3621/*
3622 * Returns true if the supplied cert |x| and key |pkey| is usable with the
3623 * specified signature scheme |sig|, or false otherwise.
3624 */
38b051a1 3625static int is_cert_usable(SSL_CONNECTION *s, const SIGALG_LOOKUP *sig, X509 *x,
5235ef44
MC		 3626 EVP_PKEY *pkey)
3627{
3628 size_t idx;
3629
ee58915c 3630 if (ssl_cert_lookup_by_pkey(pkey, &idx, SSL_CONNECTION_GET_CTX(s)) == NULL)
5235ef44
MC		 3631 return 0;
3632
3633 /* Check the key is consistent with the sig alg */
3634 if ((int)idx != sig->sig_idx)
3635 return 0;
3636
3637 return check_cert_usable(s, sig, x, pkey);
3638}
3639
3640/*
3641 * Find a signature scheme that works with the supplied certificate |x| and key
3642 * |pkey|. |x| and |pkey| may be NULL in which case we additionally look at our
3643 * available certs/keys to find one that works.
3644 */
38b051a1
TM		 3645static const SIGALG_LOOKUP *find_sig_alg(SSL_CONNECTION *s, X509 *x,
3646 EVP_PKEY *pkey)
5235ef44
MC		 3647{
3648 const SIGALG_LOOKUP *lu = NULL;
3649 size_t i;
5235ef44 3650 int curve = -1;
5235ef44 3651 EVP_PKEY *tmppkey;
38b051a1 3652 SSL_CTX *sctx = SSL_CONNECTION_GET_CTX(s);
5235ef44
MC		 3653
3654 /* Look for a shared sigalgs matching possible certificates */
3655 for (i = 0; i < s->shared_sigalgslen; i++) {
3656 lu = s->shared_sigalgs[i];
3657
3658 /* Skip SHA1, SHA224, DSA and RSA if not PSS */
3659 if (lu->hash == NID_sha1
3660 || lu->hash == NID_sha224
3661 || lu->sig == EVP_PKEY_DSA
3662 || lu->sig == EVP_PKEY_RSA)
3663 continue;
3664 /* Check that we have a cert, and signature_algorithms_cert */
38b051a1 3665 if (!tls1_lookup_md(sctx, lu, NULL))
5235ef44
MC		 3666 continue;
3667 if ((pkey == NULL && !has_usable_cert(s, lu, -1))
3668 || (pkey != NULL && !is_cert_usable(s, lu, x, pkey)))
3669 continue;
3670
3671 tmppkey = (pkey != NULL) ? pkey
3672 : s->cert->pkeys[lu->sig_idx].privatekey;
3673
3674 if (lu->sig == EVP_PKEY_EC) {
c2041da8 3675 if (curve == -1)
d8975dec 3676 curve = ssl_get_EC_curve_nid(tmppkey);
5235ef44
MC		 3677 if (lu->curve != NID_undef && curve != lu->curve)
3678 continue;
5235ef44
MC		 3679 } else if (lu->sig == EVP_PKEY_RSA_PSS) {
3680 /* validate that key is large enough for the signature algorithm */
38b051a1 3681 if (!rsa_pss_check_min_key_size(sctx, tmppkey, lu))
5235ef44
MC		 3682 continue;
3683 }
3684 break;
3685 }
3686
3687 if (i == s->shared_sigalgslen)
3688 return NULL;
3689
3690 return lu;
3691}
3692
93a77f9e
DSH		 3693/*
3694 * Choose an appropriate signature algorithm based on available certificates
717a265a
DSH		 3695 * Sets chosen certificate and signature algorithm.
3696 *
f63a17d6
MC		 3697 * For servers if we fail to find a required certificate it is a fatal error,
3698 * an appropriate error code is set and a TLS alert is sent.
717a265a 3699 *
f63a17d6 3700 * For clients fatalerrs is set to 0. If a certificate is not suitable it is not
717a265a
DSH		 3701 * a fatal error: we will either try another certificate or not present one
3702 * to the server. In this case no error is set.
93a77f9e 3703 */
38b051a1 3704int tls_choose_sigalg(SSL_CONNECTION *s, int fatalerrs)
93a77f9e 3705{
0972bc5c 3706 const SIGALG_LOOKUP *lu = NULL;
b46867d7 3707 int sig_idx = -1;
0972bc5c 3708
555cbb32
TS		 3709 s->s3.tmp.cert = NULL;
3710 s->s3.tmp.sigalg = NULL;
717a265a 3711
38b051a1 3712 if (SSL_CONNECTION_IS_TLS13(s)) {
5235ef44
MC		 3713 lu = find_sig_alg(s, NULL, NULL);
3714 if (lu == NULL) {
f63a17d6 3715 if (!fatalerrs)
717a265a 3716 return 1;
c48ffbcc 3717 SSLfatal(s, SSL_AD_HANDSHAKE_FAILURE,
f63a17d6 3718 SSL_R_NO_SUITABLE_SIGNATURE_ALGORITHM);
0972bc5c
DSH		 3719 return 0;
3720 }
3721 } else {
7f6b466b 3722 /* If ciphersuite doesn't require a cert nothing to do */
555cbb32 3723 if (!(s->s3.tmp.new_cipher->algorithm_auth & SSL_aCERT))
7f6b466b
DSH		 3724 return 1;
3725 if (!s->server && !ssl_has_cert(s, s->cert->key - s->cert->pkeys))
717a265a 3726 return 1;
0972bc5c
DSH		 3727
3728 if (SSL_USE_SIGALGS(s)) {
c589c34e 3729 size_t i;
555cbb32 3730 if (s->s3.tmp.peer_sigalgs != NULL) {
c2041da8 3731 int curve = -1;
38b051a1 3732 SSL_CTX *sctx = SSL_CONNECTION_GET_CTX(s);
599b586d
DSH		 3733
3734 /* For Suite B need to match signature algorithm to curve */
c2041da8 3735 if (tls1_suiteb(s))
d8975dec
RL		 3736 curve = ssl_get_EC_curve_nid(s->cert->pkeys[SSL_PKEY_ECC]
3737 .privatekey);
0972bc5c
DSH		 3738
3739 /*
3740 * Find highest preference signature algorithm matching
3741 * cert type
3742 */
29948ac8
BK		 3743 for (i = 0; i < s->shared_sigalgslen; i++) {
3744 lu = s->shared_sigalgs[i];
7f6b466b
DSH		 3745
3746 if (s->server) {
b46867d7 3747 if ((sig_idx = tls12_get_cert_sigalg_idx(s, lu)) == -1)
7f6b466b 3748 continue;
b46867d7
DSH		 3749 } else {
3750 int cc_idx = s->cert->key - s->cert->pkeys;
3751
3752 sig_idx = lu->sig_idx;
c589c34e
BK		 3753 if (cc_idx != sig_idx)
3754 continue;
b2021556 3755 }
c589c34e
BK		 3756 /* Check that we have a cert, and sig_algs_cert */
3757 if (!has_usable_cert(s, lu, sig_idx))
3758 continue;
0fe3db25
NR		 3759 if (lu->sig == EVP_PKEY_RSA_PSS) {
3760 /* validate that key is large enough for the signature algorithm */
bcec0b94 3761 EVP_PKEY *pkey = s->cert->pkeys[sig_idx].privatekey;
0fe3db25 3762
38b051a1 3763 if (!rsa_pss_check_min_key_size(sctx, pkey, lu))
0fe3db25
NR		 3764 continue;
3765 }
7f6b466b 3766 if (curve == -1 || lu->curve == curve)
0972bc5c
DSH		 3767 break;
3768 }
db30f432
DB		 3769#ifndef OPENSSL_NO_GOST
3770 /*
3771 * Some Windows-based implementations do not send GOST algorithms indication
3772 * in supported_algorithms extension, so when we have GOST-based ciphersuite,
3773 * we have to assume GOST support.
3774 */
38b051a1
TM		 3775 if (i == s->shared_sigalgslen
3776 && (s->s3.tmp.new_cipher->algorithm_auth
3777 & (SSL_aGOST01 | SSL_aGOST12)) != 0) {
db30f432
DB		 3778 if ((lu = tls1_get_legacy_sigalg(s, -1)) == NULL) {
3779 if (!fatalerrs)
3780 return 1;
3781 SSLfatal(s, SSL_AD_HANDSHAKE_FAILURE,
db30f432
DB		 3782 SSL_R_NO_SUITABLE_SIGNATURE_ALGORITHM);
3783 return 0;
3784 } else {
3785 i = 0;
3786 sig_idx = lu->sig_idx;
3787 }
3788 }
3789#endif
29948ac8 3790 if (i == s->shared_sigalgslen) {
f63a17d6 3791 if (!fatalerrs)
717a265a 3792 return 1;
b8fef8ee 3793 SSLfatal(s, SSL_AD_HANDSHAKE_FAILURE,
b8fef8ee 3794 SSL_R_NO_SUITABLE_SIGNATURE_ALGORITHM);
0972bc5c
DSH		 3795 return 0;
3796 }
3797 } else {
3798 /*
3799 * If we have no sigalg use defaults
3800 */
3801 const uint16_t *sent_sigs;
c589c34e 3802 size_t sent_sigslen;
0972bc5c 3803
7f6b466b 3804 if ((lu = tls1_get_legacy_sigalg(s, -1)) == NULL) {
f63a17d6 3805 if (!fatalerrs)
717a265a 3806 return 1;
b4f1b7b6 3807 SSLfatal(s, SSL_AD_HANDSHAKE_FAILURE,
a70535f8 3808 SSL_R_NO_SUITABLE_SIGNATURE_ALGORITHM);
0972bc5c
DSH		 3809 return 0;
3810 }
3811
3812 /* Check signature matches a type we sent */
3813 sent_sigslen = tls12_get_psigalgs(s, 1, &sent_sigs);
3814 for (i = 0; i < sent_sigslen; i++, sent_sigs++) {
c589c34e
BK		 3815 if (lu->sigalg == *sent_sigs
3816 && has_usable_cert(s, lu, lu->sig_idx))
0972bc5c
DSH		 3817 break;
3818 }
3819 if (i == sent_sigslen) {
f63a17d6 3820 if (!fatalerrs)
717a265a 3821 return 1;
b4f1b7b6 3822 SSLfatal(s, SSL_AD_HANDSHAKE_FAILURE,
f63a17d6 3823 SSL_R_WRONG_SIGNATURE_TYPE);
0972bc5c
DSH		 3824 return 0;
3825 }
3826 }
3827 } else {
7f6b466b 3828 if ((lu = tls1_get_legacy_sigalg(s, -1)) == NULL) {
f63a17d6 3829 if (!fatalerrs)
717a265a 3830 return 1;
c48ffbcc 3831 SSLfatal(s, SSL_AD_INTERNAL_ERROR,
a70535f8 3832 SSL_R_NO_SUITABLE_SIGNATURE_ALGORITHM);
0972bc5c
DSH		 3833 return 0;
3834 }
3835 }
93a77f9e 3836 }
b46867d7
DSH		 3837 if (sig_idx == -1)
3838 sig_idx = lu->sig_idx;
555cbb32
TS		 3839 s->s3.tmp.cert = &s->cert->pkeys[sig_idx];
3840 s->cert->key = s->s3.tmp.cert;
3841 s->s3.tmp.sigalg = lu;
93a77f9e
DSH		 3842 return 1;
3843}
cf72c757
F		 3844
3845int SSL_CTX_set_tlsext_max_fragment_length(SSL_CTX *ctx, uint8_t mode)
3846{
3847 if (mode != TLSEXT_max_fragment_length_DISABLED
3848 && !IS_MAX_FRAGMENT_LENGTH_EXT_VALID(mode)) {
6849b73c 3849 ERR_raise(ERR_LIB_SSL, SSL_R_SSL3_EXT_INVALID_MAX_FRAGMENT_LENGTH);
cf72c757
F		 3850 return 0;
3851 }
3852
3853 ctx->ext.max_fragment_len_mode = mode;
3854 return 1;
3855}
3856
3857int SSL_set_tlsext_max_fragment_length(SSL *ssl, uint8_t mode)
3858{
38b051a1
TM		 3859 SSL_CONNECTION *sc = SSL_CONNECTION_FROM_SSL(ssl);
3860
d0638fd5 3861 if (sc == NULL
d6e7ebba 3862 || (IS_QUIC(ssl) && mode != TLSEXT_max_fragment_length_DISABLED))
38b051a1
TM		 3863 return 0;
3864
cf72c757
F		 3865 if (mode != TLSEXT_max_fragment_length_DISABLED
3866 && !IS_MAX_FRAGMENT_LENGTH_EXT_VALID(mode)) {
6849b73c 3867 ERR_raise(ERR_LIB_SSL, SSL_R_SSL3_EXT_INVALID_MAX_FRAGMENT_LENGTH);
cf72c757
F		 3868 return 0;
3869 }
3870
38b051a1 3871 sc->ext.max_fragment_len_mode = mode;
cf72c757
F		 3872 return 1;
3873}
3874
3875uint8_t SSL_SESSION_get_max_fragment_length(const SSL_SESSION *session)
3876{
3877 return session->ext.max_fragment_len_mode;
3878}
a76ce286
P		 3879
3880/*
3881 * Helper functions for HMAC access with legacy support included.
3882 */
3883SSL_HMAC *ssl_hmac_new(const SSL_CTX *ctx)
3884{
3885 SSL_HMAC *ret = OPENSSL_zalloc(sizeof(*ret));
3886 EVP_MAC *mac = NULL;
3887
3888 if (ret == NULL)
3889 return NULL;
3890#ifndef OPENSSL_NO_DEPRECATED_3_0
3891 if (ctx->ext.ticket_key_evp_cb == NULL
3892 && ctx->ext.ticket_key_cb != NULL) {
301fcb28 3893 if (!ssl_hmac_old_new(ret))
a76ce286
P		 3894 goto err;
3895 return ret;
3896 }
3897#endif
7f80980f 3898 mac = EVP_MAC_fetch(ctx->libctx, "HMAC", ctx->propq);
865adf97 3899 if (mac == NULL || (ret->ctx = EVP_MAC_CTX_new(mac)) == NULL)
a76ce286
P		 3900 goto err;
3901 EVP_MAC_free(mac);
3902 return ret;
3903 err:
865adf97 3904 EVP_MAC_CTX_free(ret->ctx);
a76ce286
P		 3905 EVP_MAC_free(mac);
3906 OPENSSL_free(ret);
3907 return NULL;
3908}
3909
3910void ssl_hmac_free(SSL_HMAC *ctx)
3911{
3912 if (ctx != NULL) {
865adf97 3913 EVP_MAC_CTX_free(ctx->ctx);
a76ce286 3914#ifndef OPENSSL_NO_DEPRECATED_3_0
301fcb28 3915 ssl_hmac_old_free(ctx);
a76ce286
P		 3916#endif
3917 OPENSSL_free(ctx);
3918 }
3919}
3920
a76ce286
P		 3921EVP_MAC_CTX *ssl_hmac_get0_EVP_MAC_CTX(SSL_HMAC *ctx)
3922{
3923 return ctx->ctx;
3924}
3925
3926int ssl_hmac_init(SSL_HMAC *ctx, void *key, size_t len, char *md)
3927{
0edb8194 3928 OSSL_PARAM params[2], *p = params;
a76ce286
P		 3929
3930 if (ctx->ctx != NULL) {
3931 *p++ = OSSL_PARAM_construct_utf8_string(OSSL_MAC_PARAM_DIGEST, md, 0);
a76ce286 3932 *p = OSSL_PARAM_construct_end();
0edb8194 3933 if (EVP_MAC_init(ctx->ctx, key, len, params))
a76ce286
P		 3934 return 1;
3935 }
3936#ifndef OPENSSL_NO_DEPRECATED_3_0
3937 if (ctx->old_ctx != NULL)
301fcb28 3938 return ssl_hmac_old_init(ctx, key, len, md);
a76ce286
P		 3939#endif
3940 return 0;
3941}
3942
3943int ssl_hmac_update(SSL_HMAC *ctx, const unsigned char *data, size_t len)
3944{
3945 if (ctx->ctx != NULL)
3946 return EVP_MAC_update(ctx->ctx, data, len);
3947#ifndef OPENSSL_NO_DEPRECATED_3_0
3948 if (ctx->old_ctx != NULL)
301fcb28 3949 return ssl_hmac_old_update(ctx, data, len);
a76ce286
P		 3950#endif
3951 return 0;
3952}
3953
3954int ssl_hmac_final(SSL_HMAC *ctx, unsigned char *md, size_t *len,
3955 size_t max_size)
3956{
3957 if (ctx->ctx != NULL)
3958 return EVP_MAC_final(ctx->ctx, md, len, max_size);
3959#ifndef OPENSSL_NO_DEPRECATED_3_0
301fcb28
MC		 3960 if (ctx->old_ctx != NULL)
3961 return ssl_hmac_old_final(ctx, md, len);
a76ce286
P		 3962#endif
3963 return 0;
3964}
3965
3966size_t ssl_hmac_size(const SSL_HMAC *ctx)
3967{
3968 if (ctx->ctx != NULL)
90a2576b 3969 return EVP_MAC_CTX_get_mac_size(ctx->ctx);
a76ce286
P		 3970#ifndef OPENSSL_NO_DEPRECATED_3_0
3971 if (ctx->old_ctx != NULL)
301fcb28 3972 return ssl_hmac_old_size(ctx);
a76ce286
P		 3973#endif
3974 return 0;
3975}
3976
d8975dec
RL		 3977int ssl_get_EC_curve_nid(const EVP_PKEY *pkey)
3978{
3979 char gname[OSSL_MAX_NAME_SIZE];
3980
3981 if (EVP_PKEY_get_group_name(pkey, gname, sizeof(gname), NULL) > 0)
3982 return OBJ_txt2nid(gname);
3983
3984 return NID_undef;
3985}
d5530efa
TM		 3986
3987__owur int tls13_set_encoded_pub_key(EVP_PKEY *pkey,
3988 const unsigned char *enckey,
3989 size_t enckeylen)
3990{
3991 if (EVP_PKEY_is_a(pkey, "DH")) {
3992 int bits = EVP_PKEY_get_bits(pkey);
3993
3994 if (bits <= 0 || enckeylen != (size_t)bits / 8)
3995 /* the encoded key must be padded to the length of the p */
3996 return 0;
3997 } else if (EVP_PKEY_is_a(pkey, "EC")) {
3998 if (enckeylen < 3 /* point format and at least 1 byte for x and y */
3999 || enckey[0] != 0x04)
4000 return 0;
4001 }
4002
4003 return EVP_PKEY_set1_encoded_public_key(pkey, enckey, enckeylen);
4004}
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