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[thirdparty/openssl.git] / ssl / t1_lib.c
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846e33c7 1/*
fecb3aae 2 * Copyright 1995-2022 The OpenSSL Project Authors. All Rights Reserved.
f1fd4544 3 *
2c18d164 4 * Licensed under the Apache License 2.0 (the "License"). You may not use
846e33c7
RS		 5 * this file except in compliance with the License. You can obtain a copy
6 * in the file LICENSE in the source distribution or at
7 * https://www.openssl.org/source/license.html
f1fd4544 8 */
58964a49
RE		 9
10#include <stdio.h>
aa474d1f 11#include <stdlib.h>
ec577822 12#include <openssl/objects.h>
6434abbf
DSH		 13#include <openssl/evp.h>
14#include <openssl/hmac.h>
a76ce286 15#include <openssl/core_names.h>
67c8e7f4 16#include <openssl/ocsp.h>
5951e840
MC		 17#include <openssl/conf.h>
18#include <openssl/x509v3.h>
3c27208f
RS		 19#include <openssl/dh.h>
20#include <openssl/bn.h>
9d2d857f 21#include <openssl/provider.h>
091f6074 22#include <openssl/param_build.h>
677963e5 23#include "internal/nelem.h"
d8975dec 24#include "internal/sizes.h"
48e971dd 25#include "internal/tlsgroups.h"
706457b7 26#include "ssl_local.h"
3c27208f 27#include <openssl/ct.h>
58964a49 28
38b051a1
TM		 29static const SIGALG_LOOKUP *find_sig_alg(SSL_CONNECTION *s, X509 *x, EVP_PKEY *pkey);
30static int tls12_sigalg_allowed(const SSL_CONNECTION *s, int op, const SIGALG_LOOKUP *lu);
5235ef44 31
0f113f3e 32SSL3_ENC_METHOD const TLSv1_enc_data = {
0f113f3e
MC		 33 tls1_setup_key_block,
34 tls1_generate_master_secret,
35 tls1_change_cipher_state,
36 tls1_final_finish_mac,
0f113f3e
MC		 37 TLS_MD_CLIENT_FINISH_CONST, TLS_MD_CLIENT_FINISH_CONST_SIZE,
38 TLS_MD_SERVER_FINISH_CONST, TLS_MD_SERVER_FINISH_CONST_SIZE,
39 tls1_alert_code,
40 tls1_export_keying_material,
41 0,
a29fa98c 42 ssl3_set_handshake_header,
2c7b4dbc 43 tls_close_construct_packet,
0f113f3e
MC		 44 ssl3_handshake_write
45};
46
47SSL3_ENC_METHOD const TLSv1_1_enc_data = {
0f113f3e
MC		 48 tls1_setup_key_block,
49 tls1_generate_master_secret,
50 tls1_change_cipher_state,
51 tls1_final_finish_mac,
0f113f3e
MC		 52 TLS_MD_CLIENT_FINISH_CONST, TLS_MD_CLIENT_FINISH_CONST_SIZE,
53 TLS_MD_SERVER_FINISH_CONST, TLS_MD_SERVER_FINISH_CONST_SIZE,
54 tls1_alert_code,
55 tls1_export_keying_material,
56 SSL_ENC_FLAG_EXPLICIT_IV,
a29fa98c 57 ssl3_set_handshake_header,
2c7b4dbc 58 tls_close_construct_packet,
0f113f3e
MC		 59 ssl3_handshake_write
60};
61
62SSL3_ENC_METHOD const TLSv1_2_enc_data = {
0f113f3e
MC		 63 tls1_setup_key_block,
64 tls1_generate_master_secret,
65 tls1_change_cipher_state,
66 tls1_final_finish_mac,
0f113f3e
MC		 67 TLS_MD_CLIENT_FINISH_CONST, TLS_MD_CLIENT_FINISH_CONST_SIZE,
68 TLS_MD_SERVER_FINISH_CONST, TLS_MD_SERVER_FINISH_CONST_SIZE,
69 tls1_alert_code,
70 tls1_export_keying_material,
71 SSL_ENC_FLAG_EXPLICIT_IV | SSL_ENC_FLAG_SIGALGS | SSL_ENC_FLAG_SHA256_PRF
72 | SSL_ENC_FLAG_TLS1_2_CIPHERS,
a29fa98c 73 ssl3_set_handshake_header,
2c7b4dbc 74 tls_close_construct_packet,
0f113f3e
MC		 75 ssl3_handshake_write
76};
58964a49 77
582a17d6 78SSL3_ENC_METHOD const TLSv1_3_enc_data = {
92760c21
MC		 79 tls13_setup_key_block,
80 tls13_generate_master_secret,
81 tls13_change_cipher_state,
82 tls13_final_finish_mac,
582a17d6
MC		 83 TLS_MD_CLIENT_FINISH_CONST, TLS_MD_CLIENT_FINISH_CONST_SIZE,
84 TLS_MD_SERVER_FINISH_CONST, TLS_MD_SERVER_FINISH_CONST_SIZE,
04904312 85 tls13_alert_code,
0ca8d1ec 86 tls13_export_keying_material,
bebc0c7d 87 SSL_ENC_FLAG_SIGALGS | SSL_ENC_FLAG_SHA256_PRF,
582a17d6
MC		 88 ssl3_set_handshake_header,
89 tls_close_construct_packet,
90 ssl3_handshake_write
91};
92
f0131dc0 93OSSL_TIME tls1_default_timeout(void)
0f113f3e
MC		 94{
95 /*
96 * 2 hours, the 24 hours mentioned in the TLSv1 spec is way too long for
97 * http, the cache would over fill
98 */
f0131dc0 99 return ossl_seconds2time(60 * 60 * 2);
0f113f3e 100}
58964a49 101
6b691a5c 102int tls1_new(SSL *s)
0f113f3e
MC		 103{
104 if (!ssl3_new(s))
b77f3ed1
MC		 105 return 0;
106 if (!s->method->ssl_clear(s))
107 return 0;
108
109 return 1;
0f113f3e 110}
58964a49 111
6b691a5c 112void tls1_free(SSL *s)
0f113f3e 113{
38b051a1
TM		 114 SSL_CONNECTION *sc = SSL_CONNECTION_FROM_SSL(s);
115
116 if (sc == NULL)
117 return;
118
119 OPENSSL_free(sc->ext.session_ticket);
0f113f3e
MC		 120 ssl3_free(s);
121}
58964a49 122
b77f3ed1 123int tls1_clear(SSL *s)
0f113f3e 124{
38b051a1
TM		 125 SSL_CONNECTION *sc = SSL_CONNECTION_FROM_SSL(s);
126
127 if (sc == NULL)
128 return 0;
129
b77f3ed1
MC		 130 if (!ssl3_clear(s))
131 return 0;
132
4fa52141 133 if (s->method->version == TLS_ANY_VERSION)
38b051a1 134 sc->version = TLS_MAX_VERSION_INTERNAL;
4fa52141 135 else
38b051a1 136 sc->version = s->method->version;
b77f3ed1
MC		 137
138 return 1;
0f113f3e 139}
58964a49 140
9d2d857f
MC		 141/* Legacy NID to group_id mapping. Only works for groups we know about */
142static struct {
143 int nid;
144 uint16_t group_id;
145} nid_to_group[] = {
48e971dd
MC		 146 {NID_sect163k1, OSSL_TLS_GROUP_ID_sect163k1},
147 {NID_sect163r1, OSSL_TLS_GROUP_ID_sect163r1},
148 {NID_sect163r2, OSSL_TLS_GROUP_ID_sect163r2},
149 {NID_sect193r1, OSSL_TLS_GROUP_ID_sect193r1},
150 {NID_sect193r2, OSSL_TLS_GROUP_ID_sect193r2},
151 {NID_sect233k1, OSSL_TLS_GROUP_ID_sect233k1},
152 {NID_sect233r1, OSSL_TLS_GROUP_ID_sect233r1},
153 {NID_sect239k1, OSSL_TLS_GROUP_ID_sect239k1},
154 {NID_sect283k1, OSSL_TLS_GROUP_ID_sect283k1},
155 {NID_sect283r1, OSSL_TLS_GROUP_ID_sect283r1},
156 {NID_sect409k1, OSSL_TLS_GROUP_ID_sect409k1},
157 {NID_sect409r1, OSSL_TLS_GROUP_ID_sect409r1},
158 {NID_sect571k1, OSSL_TLS_GROUP_ID_sect571k1},
159 {NID_sect571r1, OSSL_TLS_GROUP_ID_sect571r1},
160 {NID_secp160k1, OSSL_TLS_GROUP_ID_secp160k1},
161 {NID_secp160r1, OSSL_TLS_GROUP_ID_secp160r1},
162 {NID_secp160r2, OSSL_TLS_GROUP_ID_secp160r2},
163 {NID_secp192k1, OSSL_TLS_GROUP_ID_secp192k1},
164 {NID_X9_62_prime192v1, OSSL_TLS_GROUP_ID_secp192r1},
165 {NID_secp224k1, OSSL_TLS_GROUP_ID_secp224k1},
166 {NID_secp224r1, OSSL_TLS_GROUP_ID_secp224r1},
167 {NID_secp256k1, OSSL_TLS_GROUP_ID_secp256k1},
168 {NID_X9_62_prime256v1, OSSL_TLS_GROUP_ID_secp256r1},
169 {NID_secp384r1, OSSL_TLS_GROUP_ID_secp384r1},
170 {NID_secp521r1, OSSL_TLS_GROUP_ID_secp521r1},
171 {NID_brainpoolP256r1, OSSL_TLS_GROUP_ID_brainpoolP256r1},
172 {NID_brainpoolP384r1, OSSL_TLS_GROUP_ID_brainpoolP384r1},
173 {NID_brainpoolP512r1, OSSL_TLS_GROUP_ID_brainpoolP512r1},
174 {EVP_PKEY_X25519, OSSL_TLS_GROUP_ID_x25519},
175 {EVP_PKEY_X448, OSSL_TLS_GROUP_ID_x448},
c9ee6e36
MC		 176 {NID_brainpoolP256r1tls13, OSSL_TLS_GROUP_ID_brainpoolP256r1_tls13},
177 {NID_brainpoolP384r1tls13, OSSL_TLS_GROUP_ID_brainpoolP384r1_tls13},
178 {NID_brainpoolP512r1tls13, OSSL_TLS_GROUP_ID_brainpoolP512r1_tls13},
0a10825a
BE		 179 {NID_id_tc26_gost_3410_2012_256_paramSetA, OSSL_TLS_GROUP_ID_gc256A},
180 {NID_id_tc26_gost_3410_2012_256_paramSetB, OSSL_TLS_GROUP_ID_gc256B},
181 {NID_id_tc26_gost_3410_2012_256_paramSetC, OSSL_TLS_GROUP_ID_gc256C},
182 {NID_id_tc26_gost_3410_2012_256_paramSetD, OSSL_TLS_GROUP_ID_gc256D},
183 {NID_id_tc26_gost_3410_2012_512_paramSetA, OSSL_TLS_GROUP_ID_gc512A},
184 {NID_id_tc26_gost_3410_2012_512_paramSetB, OSSL_TLS_GROUP_ID_gc512B},
185 {NID_id_tc26_gost_3410_2012_512_paramSetC, OSSL_TLS_GROUP_ID_gc512C},
48e971dd
MC		 186 {NID_ffdhe2048, OSSL_TLS_GROUP_ID_ffdhe2048},
187 {NID_ffdhe3072, OSSL_TLS_GROUP_ID_ffdhe3072},
188 {NID_ffdhe4096, OSSL_TLS_GROUP_ID_ffdhe4096},
189 {NID_ffdhe6144, OSSL_TLS_GROUP_ID_ffdhe6144},
190 {NID_ffdhe8192, OSSL_TLS_GROUP_ID_ffdhe8192}
0f113f3e
MC		 191};
192
193static const unsigned char ecformats_default[] = {
194 TLSEXT_ECPOINTFORMAT_uncompressed,
195 TLSEXT_ECPOINTFORMAT_ansiX962_compressed_prime,
196 TLSEXT_ECPOINTFORMAT_ansiX962_compressed_char2
197};
198
fe6ef247 199/* The default curves */
9aaecbfc 200static const uint16_t supported_groups_default[] = {
0a10825a
BE		 201 OSSL_TLS_GROUP_ID_x25519, /* X25519 (29) */
202 OSSL_TLS_GROUP_ID_secp256r1, /* secp256r1 (23) */
203 OSSL_TLS_GROUP_ID_x448, /* X448 (30) */
204 OSSL_TLS_GROUP_ID_secp521r1, /* secp521r1 (25) */
205 OSSL_TLS_GROUP_ID_secp384r1, /* secp384r1 (24) */
206 OSSL_TLS_GROUP_ID_gc256A, /* GC256A (34) */
207 OSSL_TLS_GROUP_ID_gc256B, /* GC256B (35) */
208 OSSL_TLS_GROUP_ID_gc256C, /* GC256C (36) */
209 OSSL_TLS_GROUP_ID_gc256D, /* GC256D (37) */
210 OSSL_TLS_GROUP_ID_gc512A, /* GC512A (38) */
211 OSSL_TLS_GROUP_ID_gc512B, /* GC512B (39) */
212 OSSL_TLS_GROUP_ID_gc512C, /* GC512C (40) */
213 OSSL_TLS_GROUP_ID_ffdhe2048, /* ffdhe2048 (0x100) */
214 OSSL_TLS_GROUP_ID_ffdhe3072, /* ffdhe3072 (0x101) */
215 OSSL_TLS_GROUP_ID_ffdhe4096, /* ffdhe4096 (0x102) */
216 OSSL_TLS_GROUP_ID_ffdhe6144, /* ffdhe6144 (0x103) */
217 OSSL_TLS_GROUP_ID_ffdhe8192, /* ffdhe8192 (0x104) */
de57d237
EK		 218};
219
9e84a42d 220static const uint16_t suiteb_curves[] = {
0a10825a
BE		 221 OSSL_TLS_GROUP_ID_secp256r1,
222 OSSL_TLS_GROUP_ID_secp384r1,
0f113f3e 223};
2ea80354 224
ee58915c 225struct provider_ctx_data_st {
9d2d857f
MC		 226 SSL_CTX *ctx;
227 OSSL_PROVIDER *provider;
228};
229
230#define TLS_GROUP_LIST_MALLOC_BLOCK_SIZE 10
231static OSSL_CALLBACK add_provider_groups;
232static int add_provider_groups(const OSSL_PARAM params[], void *data)
233{
ee58915c 234 struct provider_ctx_data_st *pgd = data;
9d2d857f
MC		 235 SSL_CTX *ctx = pgd->ctx;
236 OSSL_PROVIDER *provider = pgd->provider;
237 const OSSL_PARAM *p;
238 TLS_GROUP_INFO *ginf = NULL;
239 EVP_KEYMGMT *keymgmt;
240 unsigned int gid;
c1a74f59 241 unsigned int is_kem = 0;
9d2d857f
MC		 242 int ret = 0;
243
244 if (ctx->group_list_max_len == ctx->group_list_len) {
245 TLS_GROUP_INFO *tmp = NULL;
246
247 if (ctx->group_list_max_len == 0)
248 tmp = OPENSSL_malloc(sizeof(TLS_GROUP_INFO)
249 * TLS_GROUP_LIST_MALLOC_BLOCK_SIZE);
250 else
251 tmp = OPENSSL_realloc(ctx->group_list,
252 (ctx->group_list_max_len
253 + TLS_GROUP_LIST_MALLOC_BLOCK_SIZE)
254 * sizeof(TLS_GROUP_INFO));
e077455e 255 if (tmp == NULL)
9d2d857f 256 return 0;
9d2d857f
MC		 257 ctx->group_list = tmp;
258 memset(tmp + ctx->group_list_max_len,
259 0,
260 sizeof(TLS_GROUP_INFO) * TLS_GROUP_LIST_MALLOC_BLOCK_SIZE);
261 ctx->group_list_max_len += TLS_GROUP_LIST_MALLOC_BLOCK_SIZE;
262 }
263
264 ginf = &ctx->group_list[ctx->group_list_len];
265
266 p = OSSL_PARAM_locate_const(params, OSSL_CAPABILITY_TLS_GROUP_NAME);
267 if (p == NULL || p->data_type != OSSL_PARAM_UTF8_STRING) {
6849b73c 268 ERR_raise(ERR_LIB_SSL, ERR_R_PASSED_INVALID_ARGUMENT);
9d2d857f
MC		 269 goto err;
270 }
271 ginf->tlsname = OPENSSL_strdup(p->data);
e077455e 272 if (ginf->tlsname == NULL)
9d2d857f 273 goto err;
9d2d857f
MC		 274
275 p = OSSL_PARAM_locate_const(params, OSSL_CAPABILITY_TLS_GROUP_NAME_INTERNAL);
276 if (p == NULL || p->data_type != OSSL_PARAM_UTF8_STRING) {
6849b73c 277 ERR_raise(ERR_LIB_SSL, ERR_R_PASSED_INVALID_ARGUMENT);
9d2d857f
MC		 278 goto err;
279 }
280 ginf->realname = OPENSSL_strdup(p->data);
e077455e 281 if (ginf->realname == NULL)
9d2d857f 282 goto err;
9d2d857f
MC		 283
284 p = OSSL_PARAM_locate_const(params, OSSL_CAPABILITY_TLS_GROUP_ID);
285 if (p == NULL || !OSSL_PARAM_get_uint(p, &gid) || gid > UINT16_MAX) {
6849b73c 286 ERR_raise(ERR_LIB_SSL, ERR_R_PASSED_INVALID_ARGUMENT);
9d2d857f
MC		 287 goto err;
288 }
289 ginf->group_id = (uint16_t)gid;
290
291 p = OSSL_PARAM_locate_const(params, OSSL_CAPABILITY_TLS_GROUP_ALG);
292 if (p == NULL || p->data_type != OSSL_PARAM_UTF8_STRING) {
6849b73c 293 ERR_raise(ERR_LIB_SSL, ERR_R_PASSED_INVALID_ARGUMENT);
9d2d857f
MC		 294 goto err;
295 }
296 ginf->algorithm = OPENSSL_strdup(p->data);
e077455e 297 if (ginf->algorithm == NULL)
9d2d857f 298 goto err;
9d2d857f
MC		 299
300 p = OSSL_PARAM_locate_const(params, OSSL_CAPABILITY_TLS_GROUP_SECURITY_BITS);
301 if (p == NULL || !OSSL_PARAM_get_uint(p, &ginf->secbits)) {
6849b73c 302 ERR_raise(ERR_LIB_SSL, ERR_R_PASSED_INVALID_ARGUMENT);
9d2d857f
MC		 303 goto err;
304 }
305
c1a74f59
NT		 306 p = OSSL_PARAM_locate_const(params, OSSL_CAPABILITY_TLS_GROUP_IS_KEM);
307 if (p != NULL && (!OSSL_PARAM_get_uint(p, &is_kem) || is_kem > 1)) {
6849b73c 308 ERR_raise(ERR_LIB_SSL, ERR_R_PASSED_INVALID_ARGUMENT);
c1a74f59
NT		 309 goto err;
310 }
311 ginf->is_kem = 1 & is_kem;
312
9d2d857f
MC		 313 p = OSSL_PARAM_locate_const(params, OSSL_CAPABILITY_TLS_GROUP_MIN_TLS);
314 if (p == NULL || !OSSL_PARAM_get_int(p, &ginf->mintls)) {
6849b73c 315 ERR_raise(ERR_LIB_SSL, ERR_R_PASSED_INVALID_ARGUMENT);
9d2d857f
MC		 316 goto err;
317 }
318
319 p = OSSL_PARAM_locate_const(params, OSSL_CAPABILITY_TLS_GROUP_MAX_TLS);
320 if (p == NULL || !OSSL_PARAM_get_int(p, &ginf->maxtls)) {
6849b73c 321 ERR_raise(ERR_LIB_SSL, ERR_R_PASSED_INVALID_ARGUMENT);
90a74d8c 322 goto err;
9d2d857f
MC		 323 }
324
325 p = OSSL_PARAM_locate_const(params, OSSL_CAPABILITY_TLS_GROUP_MIN_DTLS);
326 if (p == NULL || !OSSL_PARAM_get_int(p, &ginf->mindtls)) {
6849b73c 327 ERR_raise(ERR_LIB_SSL, ERR_R_PASSED_INVALID_ARGUMENT);
9d2d857f
MC		 328 goto err;
329 }
330
331 p = OSSL_PARAM_locate_const(params, OSSL_CAPABILITY_TLS_GROUP_MAX_DTLS);
332 if (p == NULL || !OSSL_PARAM_get_int(p, &ginf->maxdtls)) {
6849b73c 333 ERR_raise(ERR_LIB_SSL, ERR_R_PASSED_INVALID_ARGUMENT);
9d2d857f
MC		 334 goto err;
335 }
336 /*
337 * Now check that the algorithm is actually usable for our property query
338 * string. Regardless of the result we still return success because we have
339 * successfully processed this group, even though we may decide not to use
340 * it.
341 */
342 ret = 1;
ce8822b7 343 ERR_set_mark();
9d2d857f
MC		 344 keymgmt = EVP_KEYMGMT_fetch(ctx->libctx, ginf->algorithm, ctx->propq);
345 if (keymgmt != NULL) {
346 /*
347 * We have successfully fetched the algorithm - however if the provider
348 * doesn't match this one then we ignore it.
349 *
350 * Note: We're cheating a little here. Technically if the same algorithm
351 * is available from more than one provider then it is undefined which
352 * implementation you will get back. Theoretically this could be
353 * different every time...we assume here that you'll always get the
354 * same one back if you repeat the exact same fetch. Is this a reasonable
355 * assumption to make (in which case perhaps we should document this
356 * behaviour)?
357 */
ed576acd 358 if (EVP_KEYMGMT_get0_provider(keymgmt) == provider) {
9d2d857f
MC		 359 /* We have a match - so we will use this group */
360 ctx->group_list_len++;
361 ginf = NULL;
362 }
363 EVP_KEYMGMT_free(keymgmt);
364 }
ce8822b7 365 ERR_pop_to_mark();
9d2d857f
MC		 366 err:
367 if (ginf != NULL) {
368 OPENSSL_free(ginf->tlsname);
369 OPENSSL_free(ginf->realname);
370 OPENSSL_free(ginf->algorithm);
a7863f99 371 ginf->algorithm = ginf->tlsname = ginf->realname = NULL;
9d2d857f
MC		 372 }
373 return ret;
374}
375
376static int discover_provider_groups(OSSL_PROVIDER *provider, void *vctx)
377{
ee58915c 378 struct provider_ctx_data_st pgd;
9d2d857f
MC		 379
380 pgd.ctx = vctx;
381 pgd.provider = provider;
382 return OSSL_PROVIDER_get_capabilities(provider, "TLS-GROUP",
383 add_provider_groups, &pgd);
384}
385
386int ssl_load_groups(SSL_CTX *ctx)
387{
ddf8f1ce 388 size_t i, j, num_deflt_grps = 0;
8b1db5d3 389 uint16_t tmp_supp_groups[OSSL_NELEM(supported_groups_default)];
ddf8f1ce
MC		 390
391 if (!OSSL_PROVIDER_do_all(ctx->libctx, discover_provider_groups, ctx))
392 return 0;
393
8b1db5d3 394 for (i = 0; i < OSSL_NELEM(supported_groups_default); i++) {
ddf8f1ce 395 for (j = 0; j < ctx->group_list_len; j++) {
8b1db5d3 396 if (ctx->group_list[j].group_id == supported_groups_default[i]) {
ddf8f1ce 397 tmp_supp_groups[num_deflt_grps++] = ctx->group_list[j].group_id;
8b1db5d3
MC		 398 break;
399 }
ddf8f1ce
MC		 400 }
401 }
402
403 if (num_deflt_grps == 0)
404 return 1;
405
406 ctx->ext.supported_groups_default
407 = OPENSSL_malloc(sizeof(uint16_t) * num_deflt_grps);
408
e077455e 409 if (ctx->ext.supported_groups_default == NULL)
ddf8f1ce 410 return 0;
ddf8f1ce 411
8b1db5d3
MC		 412 memcpy(ctx->ext.supported_groups_default,
413 tmp_supp_groups,
414 num_deflt_grps * sizeof(tmp_supp_groups[0]));
ddf8f1ce
MC		 415 ctx->ext.supported_groups_default_len = num_deflt_grps;
416
417 return 1;
9d2d857f
MC		 418}
419
ee58915c
MB		 420#define TLS_SIGALG_LIST_MALLOC_BLOCK_SIZE 10
421static OSSL_CALLBACK add_provider_sigalgs;
422static int add_provider_sigalgs(const OSSL_PARAM params[], void *data)
423{
424 struct provider_ctx_data_st *pgd = data;
425 SSL_CTX *ctx = pgd->ctx;
426 OSSL_PROVIDER *provider = pgd->provider;
427 const OSSL_PARAM *p;
428 TLS_SIGALG_INFO *sinf = NULL;
429 EVP_KEYMGMT *keymgmt;
430 const char *keytype;
431 unsigned int code_point = 0;
432 int ret = 0;
433
434 if (ctx->sigalg_list_max_len == ctx->sigalg_list_len) {
435 TLS_SIGALG_INFO *tmp = NULL;
436
437 if (ctx->sigalg_list_max_len == 0)
438 tmp = OPENSSL_malloc(sizeof(TLS_SIGALG_INFO)
439 * TLS_SIGALG_LIST_MALLOC_BLOCK_SIZE);
440 else
441 tmp = OPENSSL_realloc(ctx->sigalg_list,
442 (ctx->sigalg_list_max_len
443 + TLS_SIGALG_LIST_MALLOC_BLOCK_SIZE)
444 * sizeof(TLS_SIGALG_INFO));
445 if (tmp == NULL)
446 return 0;
447 ctx->sigalg_list = tmp;
448 memset(tmp + ctx->sigalg_list_max_len, 0,
449 sizeof(TLS_SIGALG_INFO) * TLS_SIGALG_LIST_MALLOC_BLOCK_SIZE);
450 ctx->sigalg_list_max_len += TLS_SIGALG_LIST_MALLOC_BLOCK_SIZE;
451 }
452
453 sinf = &ctx->sigalg_list[ctx->sigalg_list_len];
454
455 /* First, mandatory parameters */
456 p = OSSL_PARAM_locate_const(params, OSSL_CAPABILITY_TLS_SIGALG_NAME);
457 if (p == NULL || p->data_type != OSSL_PARAM_UTF8_STRING) {
458 ERR_raise(ERR_LIB_SSL, ERR_R_PASSED_INVALID_ARGUMENT);
459 goto err;
460 }
461 OPENSSL_free(sinf->sigalg_name);
462 sinf->sigalg_name = OPENSSL_strdup(p->data);
463 if (sinf->sigalg_name == NULL)
464 goto err;
465
466 p = OSSL_PARAM_locate_const(params, OSSL_CAPABILITY_TLS_SIGALG_IANA_NAME);
467 if (p == NULL || p->data_type != OSSL_PARAM_UTF8_STRING) {
468 ERR_raise(ERR_LIB_SSL, ERR_R_PASSED_INVALID_ARGUMENT);
469 goto err;
470 }
471 OPENSSL_free(sinf->name);
472 sinf->name = OPENSSL_strdup(p->data);
473 if (sinf->name == NULL)
474 goto err;
475
476 p = OSSL_PARAM_locate_const(params,
477 OSSL_CAPABILITY_TLS_SIGALG_CODE_POINT);
478 if (p == NULL
479 || !OSSL_PARAM_get_uint(p, &code_point)
480 || code_point > UINT16_MAX) {
481 ERR_raise(ERR_LIB_SSL, ERR_R_PASSED_INVALID_ARGUMENT);
482 goto err;
483 }
484 sinf->code_point = (uint16_t)code_point;
485
486 p = OSSL_PARAM_locate_const(params,
487 OSSL_CAPABILITY_TLS_SIGALG_SECURITY_BITS);
488 if (p == NULL || !OSSL_PARAM_get_uint(p, &sinf->secbits)) {
489 ERR_raise(ERR_LIB_SSL, ERR_R_PASSED_INVALID_ARGUMENT);
490 goto err;
491 }
492
493 /* Now, optional parameters */
494 p = OSSL_PARAM_locate_const(params, OSSL_CAPABILITY_TLS_SIGALG_OID);
495 if (p == NULL) {
496 sinf->sigalg_oid = NULL;
497 } else if (p->data_type != OSSL_PARAM_UTF8_STRING) {
498 goto err;
499 } else {
500 OPENSSL_free(sinf->sigalg_oid);
501 sinf->sigalg_oid = OPENSSL_strdup(p->data);
502 if (sinf->sigalg_oid == NULL)
503 goto err;
504 }
505
506 p = OSSL_PARAM_locate_const(params, OSSL_CAPABILITY_TLS_SIGALG_SIG_NAME);
507 if (p == NULL) {
508 sinf->sig_name = NULL;
509 } else if (p->data_type != OSSL_PARAM_UTF8_STRING) {
510 goto err;
511 } else {
512 OPENSSL_free(sinf->sig_name);
513 sinf->sig_name = OPENSSL_strdup(p->data);
514 if (sinf->sig_name == NULL)
515 goto err;
516 }
517
518 p = OSSL_PARAM_locate_const(params, OSSL_CAPABILITY_TLS_SIGALG_SIG_OID);
519 if (p == NULL) {
520 sinf->sig_oid = NULL;
521 } else if (p->data_type != OSSL_PARAM_UTF8_STRING) {
522 goto err;
523 } else {
524 OPENSSL_free(sinf->sig_oid);
525 sinf->sig_oid = OPENSSL_strdup(p->data);
526 if (sinf->sig_oid == NULL)
527 goto err;
528 }
529
530 p = OSSL_PARAM_locate_const(params, OSSL_CAPABILITY_TLS_SIGALG_HASH_NAME);
531 if (p == NULL) {
532 sinf->hash_name = NULL;
533 } else if (p->data_type != OSSL_PARAM_UTF8_STRING) {
534 goto err;
535 } else {
536 OPENSSL_free(sinf->hash_name);
537 sinf->hash_name = OPENSSL_strdup(p->data);
538 if (sinf->hash_name == NULL)
539 goto err;
540 }
541
542 p = OSSL_PARAM_locate_const(params, OSSL_CAPABILITY_TLS_SIGALG_HASH_OID);
543 if (p == NULL) {
544 sinf->hash_oid = NULL;
545 } else if (p->data_type != OSSL_PARAM_UTF8_STRING) {
546 goto err;
547 } else {
548 OPENSSL_free(sinf->hash_oid);
549 sinf->hash_oid = OPENSSL_strdup(p->data);
550 if (sinf->hash_oid == NULL)
551 goto err;
552 }
553
554 p = OSSL_PARAM_locate_const(params, OSSL_CAPABILITY_TLS_SIGALG_KEYTYPE);
555 if (p == NULL) {
556 sinf->keytype = NULL;
557 } else if (p->data_type != OSSL_PARAM_UTF8_STRING) {
558 goto err;
559 } else {
560 OPENSSL_free(sinf->keytype);
561 sinf->keytype = OPENSSL_strdup(p->data);
562 if (sinf->keytype == NULL)
563 goto err;
564 }
565
566 p = OSSL_PARAM_locate_const(params, OSSL_CAPABILITY_TLS_SIGALG_KEYTYPE_OID);
567 if (p == NULL) {
568 sinf->keytype_oid = NULL;
569 } else if (p->data_type != OSSL_PARAM_UTF8_STRING) {
570 goto err;
571 } else {
572 OPENSSL_free(sinf->keytype_oid);
573 sinf->keytype_oid = OPENSSL_strdup(p->data);
574 if (sinf->keytype_oid == NULL)
575 goto err;
576 }
577
578 /* The remaining parameters below are mandatory again */
579 p = OSSL_PARAM_locate_const(params, OSSL_CAPABILITY_TLS_SIGALG_MIN_TLS);
580 if (p == NULL || !OSSL_PARAM_get_int(p, &sinf->mintls)) {
581 ERR_raise(ERR_LIB_SSL, ERR_R_PASSED_INVALID_ARGUMENT);
582 goto err;
583 }
584 if ((sinf->mintls != 0) && (sinf->mintls != -1) &&
585 ((sinf->mintls < TLS1_3_VERSION))) {
586 /* ignore this sigalg as this OpenSSL doesn't know how to handle it */
587 ret = 1;
588 goto err;
589 }
590
591 p = OSSL_PARAM_locate_const(params, OSSL_CAPABILITY_TLS_SIGALG_MAX_TLS);
592 if (p == NULL || !OSSL_PARAM_get_int(p, &sinf->maxtls)) {
593 ERR_raise(ERR_LIB_SSL, ERR_R_PASSED_INVALID_ARGUMENT);
594 goto err;
595 }
596 if ((sinf->maxtls != 0) && (sinf->maxtls != -1) &&
597 ((sinf->maxtls < sinf->mintls))) {
598 ERR_raise(ERR_LIB_SSL, ERR_R_PASSED_INVALID_ARGUMENT);
599 goto err;
600 }
601 if ((sinf->maxtls != 0) && (sinf->maxtls != -1) &&
602 ((sinf->maxtls < TLS1_3_VERSION))) {
603 /* ignore this sigalg as this OpenSSL doesn't know how to handle it */
604 ret = 1;
605 goto err;
606 }
607
608 /*
609 * Now check that the algorithm is actually usable for our property query
610 * string. Regardless of the result we still return success because we have
611 * successfully processed this signature, even though we may decide not to
612 * use it.
613 */
614 ret = 1;
615 ERR_set_mark();
616 keytype = (sinf->keytype != NULL
617 ? sinf->keytype
618 : (sinf->sig_name != NULL
619 ? sinf->sig_name
620 : sinf->sigalg_name));
621 keymgmt = EVP_KEYMGMT_fetch(ctx->libctx, keytype, ctx->propq);
622 if (keymgmt != NULL) {
623 /*
624 * We have successfully fetched the algorithm - however if the provider
625 * doesn't match this one then we ignore it.
626 *
627 * Note: We're cheating a little here. Technically if the same algorithm
628 * is available from more than one provider then it is undefined which
629 * implementation you will get back. Theoretically this could be
630 * different every time...we assume here that you'll always get the
631 * same one back if you repeat the exact same fetch. Is this a reasonable
632 * assumption to make (in which case perhaps we should document this
633 * behaviour)?
634 */
635 if (EVP_KEYMGMT_get0_provider(keymgmt) == provider) {
636 /*
637 * We have a match - so we could use this signature;
638 * Check proper object registration first, though.
639 * Don't care about return value as this may have been
640 * done within providers or previous calls to
641 * add_provider_sigalgs.
642 */
643 OBJ_create(sinf->sigalg_oid, sinf->sigalg_name, NULL);
644 /* sanity check: Without successful registration don't use alg */
645 if ((OBJ_txt2nid(sinf->sigalg_name) == NID_undef) ||
646 (OBJ_nid2obj(OBJ_txt2nid(sinf->sigalg_name)) == NULL)) {
647 ERR_raise(ERR_LIB_SSL, ERR_R_PASSED_INVALID_ARGUMENT);
648 goto err;
649 }
650 if (sinf->sig_name != NULL)
651 OBJ_create(sinf->sig_oid, sinf->sig_name, NULL);
652 if (sinf->keytype != NULL)
653 OBJ_create(sinf->keytype_oid, sinf->keytype, NULL);
654 if (sinf->hash_name != NULL)
655 OBJ_create(sinf->hash_oid, sinf->hash_name, NULL);
656 OBJ_add_sigid(OBJ_txt2nid(sinf->sigalg_name),
657 (sinf->hash_name != NULL
658 ? OBJ_txt2nid(sinf->hash_name)
659 : NID_undef),
660 OBJ_txt2nid(keytype));
661 ctx->sigalg_list_len++;
662 sinf = NULL;
663 }
664 EVP_KEYMGMT_free(keymgmt);
665 }
666 ERR_pop_to_mark();
667 err:
668 if (sinf != NULL) {
669 OPENSSL_free(sinf->name);
670 sinf->name = NULL;
671 OPENSSL_free(sinf->sigalg_name);
672 sinf->sigalg_name = NULL;
673 OPENSSL_free(sinf->sigalg_oid);
674 sinf->sigalg_oid = NULL;
675 OPENSSL_free(sinf->sig_name);
676 sinf->sig_name = NULL;
677 OPENSSL_free(sinf->sig_oid);
678 sinf->sig_oid = NULL;
679 OPENSSL_free(sinf->hash_name);
680 sinf->hash_name = NULL;
681 OPENSSL_free(sinf->hash_oid);
682 sinf->hash_oid = NULL;
683 OPENSSL_free(sinf->keytype);
684 sinf->keytype = NULL;
685 OPENSSL_free(sinf->keytype_oid);
686 sinf->keytype_oid = NULL;
687 }
688 return ret;
689}
690
691static int discover_provider_sigalgs(OSSL_PROVIDER *provider, void *vctx)
692{
693 struct provider_ctx_data_st pgd;
694
695 pgd.ctx = vctx;
696 pgd.provider = provider;
697 OSSL_PROVIDER_get_capabilities(provider, "TLS-SIGALG",
698 add_provider_sigalgs, &pgd);
699 /*
700 * Always OK, even if provider doesn't support the capability:
701 * Reconsider testing retval when legacy sigalgs are also loaded this way.
702 */
703 return 1;
704}
705
706int ssl_load_sigalgs(SSL_CTX *ctx)
707{
708 size_t i;
709 SSL_CERT_LOOKUP lu;
710
711 if (!OSSL_PROVIDER_do_all(ctx->libctx, discover_provider_sigalgs, ctx))
712 return 0;
713
714 /* now populate ctx->ssl_cert_info */
715 if (ctx->sigalg_list_len > 0) {
716 ctx->ssl_cert_info = OPENSSL_zalloc(sizeof(lu) * ctx->sigalg_list_len);
717 if (ctx->ssl_cert_info == NULL)
718 return 0;
719 for(i = 0; i < ctx->sigalg_list_len; i++) {
720 ctx->ssl_cert_info[i].nid = OBJ_txt2nid(ctx->sigalg_list[i].sigalg_name);
721 ctx->ssl_cert_info[i].amask = SSL_aANY;
722 }
723 }
724
725 /*
726 * For now, leave it at this: legacy sigalgs stay in their own
727 * data structures until "legacy cleanup" occurs.
728 */
729
730 return 1;
731}
732
260009d8
MC		 733static uint16_t tls1_group_name2id(SSL_CTX *ctx, const char *name)
734{
735 size_t i;
260009d8
MC		 736
737 for (i = 0; i < ctx->group_list_len; i++) {
738 if (strcmp(ctx->group_list[i].tlsname, name) == 0
306b8e7e 739 || strcmp(ctx->group_list[i].realname, name) == 0)
260009d8
MC		 740 return ctx->group_list[i].group_id;
741 }
742
743 return 0;
744}
745
9d2d857f 746const TLS_GROUP_INFO *tls1_group_id_lookup(SSL_CTX *ctx, uint16_t group_id)
0f113f3e 747{
9aaecbfc 748 size_t i;
749
9d2d857f
MC		 750 for (i = 0; i < ctx->group_list_len; i++) {
751 if (ctx->group_list[i].group_id == group_id)
752 return &ctx->group_list[i];
9aaecbfc 753 }
9d2d857f 754
9aaecbfc 755 return NULL;
0f113f3e 756}
525de5d3 757
260009d8 758int tls1_group_id2nid(uint16_t group_id, int include_unknown)
84d4b9e3 759{
9d2d857f 760 size_t i;
84d4b9e3 761
260009d8
MC		 762 if (group_id == 0)
763 return NID_undef;
764
9d2d857f
MC		 765 /*
766 * Return well known Group NIDs - for backwards compatibility. This won't
767 * work for groups we don't know about.
768 */
769 for (i = 0; i < OSSL_NELEM(nid_to_group); i++)
770 {
771 if (nid_to_group[i].group_id == group_id)
772 return nid_to_group[i].nid;
773 }
260009d8
MC		 774 if (!include_unknown)
775 return NID_undef;
776 return TLSEXT_nid_unknown | (int)group_id;
84d4b9e3 777}
778
becbacd7 779uint16_t tls1_nid2group_id(int nid)
0f113f3e 780{
2fa2d15a 781 size_t i;
9aaecbfc 782
9d2d857f
MC		 783 /*
784 * Return well known Group ids - for backwards compatibility. This won't
785 * work for groups we don't know about.
786 */
787 for (i = 0; i < OSSL_NELEM(nid_to_group); i++)
788 {
789 if (nid_to_group[i].nid == nid)
790 return nid_to_group[i].group_id;
0f113f3e 791 }
9d2d857f 792
2fa2d15a 793 return 0;
0f113f3e
MC		 794}
795
740580c2 796/*
ff6d20a6
DSH		 797 * Set *pgroups to the supported groups list and *pgroupslen to
798 * the number of groups supported.
fd2b65ce 799 */
38b051a1 800void tls1_get_supported_groups(SSL_CONNECTION *s, const uint16_t **pgroups,
ff6d20a6 801 size_t *pgroupslen)
0f113f3e 802{
38b051a1
TM		 803 SSL_CTX *sctx = SSL_CONNECTION_GET_CTX(s);
804
34e5292c
DSH		 805 /* For Suite B mode only include P-256, P-384 */
806 switch (tls1_suiteb(s)) {
807 case SSL_CERT_FLAG_SUITEB_128_LOS:
ff6d20a6
DSH		 808 *pgroups = suiteb_curves;
809 *pgroupslen = OSSL_NELEM(suiteb_curves);
34e5292c
DSH		 810 break;
811
812 case SSL_CERT_FLAG_SUITEB_128_LOS_ONLY:
ff6d20a6
DSH		 813 *pgroups = suiteb_curves;
814 *pgroupslen = 1;
34e5292c
DSH		 815 break;
816
817 case SSL_CERT_FLAG_SUITEB_192_LOS:
ff6d20a6
DSH		 818 *pgroups = suiteb_curves + 1;
819 *pgroupslen = 1;
34e5292c
DSH		 820 break;
821
822 default:
823 if (s->ext.supportedgroups == NULL) {
38b051a1
TM		 824 *pgroups = sctx->ext.supported_groups_default;
825 *pgroupslen = sctx->ext.supported_groups_default_len;
34e5292c 826 } else {
ff6d20a6
DSH		 827 *pgroups = s->ext.supportedgroups;
828 *pgroupslen = s->ext.supportedgroups_len;
0f113f3e 829 }
34e5292c 830 break;
0f113f3e 831 }
0f113f3e 832}
b362ccab 833
38b051a1
TM		 834int tls_valid_group(SSL_CONNECTION *s, uint16_t group_id,
835 int minversion, int maxversion,
8b1db5d3 836 int isec, int *okfortls13)
9aaecbfc 837{
38b051a1
TM		 838 const TLS_GROUP_INFO *ginfo = tls1_group_id_lookup(SSL_CONNECTION_GET_CTX(s),
839 group_id);
9d2d857f 840 int ret;
9aaecbfc 841
8b1db5d3 842 if (okfortls13 != NULL)
89e14ca7 843 *okfortls13 = 0;
8b1db5d3 844
9d2d857f
MC		 845 if (ginfo == NULL)
846 return 0;
847
38b051a1 848 if (SSL_CONNECTION_IS_DTLS(s)) {
9d2d857f 849 if (ginfo->mindtls < 0 || ginfo->maxdtls < 0)
9aaecbfc 850 return 0;
9d2d857f
MC		 851 if (ginfo->maxdtls == 0)
852 ret = 1;
853 else
854 ret = DTLS_VERSION_LE(minversion, ginfo->maxdtls);
855 if (ginfo->mindtls > 0)
856 ret &= DTLS_VERSION_GE(maxversion, ginfo->mindtls);
857 } else {
858 if (ginfo->mintls < 0 || ginfo->maxtls < 0)
859 return 0;
860 if (ginfo->maxtls == 0)
861 ret = 1;
862 else
863 ret = (minversion <= ginfo->maxtls);
864 if (ginfo->mintls > 0)
865 ret &= (maxversion >= ginfo->mintls);
8b1db5d3
MC		 866 if (ret && okfortls13 != NULL && maxversion == TLS1_3_VERSION)
867 *okfortls13 = (ginfo->maxtls == 0)
868 || (ginfo->maxtls >= TLS1_3_VERSION);
9aaecbfc 869 }
8b1db5d3
MC		 870 ret &= !isec
871 || strcmp(ginfo->algorithm, "EC") == 0
872 || strcmp(ginfo->algorithm, "X25519") == 0
873 || strcmp(ginfo->algorithm, "X448") == 0;
9d2d857f
MC		 874
875 return ret;
9aaecbfc 876}
877
dbc6268f 878/* See if group is allowed by security callback */
38b051a1 879int tls_group_allowed(SSL_CONNECTION *s, uint16_t group, int op)
0f113f3e 880{
38b051a1
TM		 881 const TLS_GROUP_INFO *ginfo = tls1_group_id_lookup(SSL_CONNECTION_GET_CTX(s),
882 group);
dbc6268f 883 unsigned char gtmp[2];
5ce5f787 884
dbc6268f 885 if (ginfo == NULL)
0f113f3e 886 return 0;
9d2d857f 887
dbc6268f
MC		 888 gtmp[0] = group >> 8;
889 gtmp[1] = group & 0xff;
9d2d857f 890 return ssl_security(s, op, ginfo->secbits,
260009d8 891 tls1_group_id2nid(ginfo->group_id, 0), (void *)gtmp);
0f113f3e 892}
b362ccab 893
b50951d3
DSH		 894/* Return 1 if "id" is in "list" */
895static int tls1_in_list(uint16_t id, const uint16_t *list, size_t listlen)
896{
897 size_t i;
898 for (i = 0; i < listlen; i++)
899 if (list[i] == id)
900 return 1;
901 return 0;
902}
903
1d97c843 904/*-
8841154a 905 * For nmatch >= 0, return the id of the |nmatch|th shared group or 0
6977e8ee
KR		 906 * if there is no match.
907 * For nmatch == -1, return number of matches
8841154a 908 * For nmatch == -2, return the id of the group to use for
b50951d3 909 * a tmp key, or 0 if there is no match.
d0595f17 910 */
38b051a1 911uint16_t tls1_shared_group(SSL_CONNECTION *s, int nmatch)
0f113f3e 912{
9e84a42d 913 const uint16_t *pref, *supp;
b50951d3 914 size_t num_pref, num_supp, i;
0f113f3e 915 int k;
3e373518 916
0f113f3e
MC		 917 /* Can't do anything on client side */
918 if (s->server == 0)
8841154a 919 return 0;
0f113f3e
MC		 920 if (nmatch == -2) {
921 if (tls1_suiteb(s)) {
922 /*
923 * For Suite B ciphersuite determines curve: we already know
924 * these are acceptable due to previous checks.
925 */
555cbb32 926 unsigned long cid = s->s3.tmp.new_cipher->id;
3e373518 927
0f113f3e 928 if (cid == TLS1_CK_ECDHE_ECDSA_WITH_AES_128_GCM_SHA256)
0a10825a 929 return OSSL_TLS_GROUP_ID_secp256r1;
0f113f3e 930 if (cid == TLS1_CK_ECDHE_ECDSA_WITH_AES_256_GCM_SHA384)
0a10825a 931 return OSSL_TLS_GROUP_ID_secp384r1;
0f113f3e 932 /* Should never happen */
8841154a 933 return 0;
0f113f3e
MC		 934 }
935 /* If not Suite B just return first preference shared curve */
936 nmatch = 0;
937 }
938 /*
ff6d20a6
DSH		 939 * If server preference set, our groups are the preference order
940 * otherwise peer decides.
0f113f3e 941 */
ff6d20a6
DSH		 942 if (s->options & SSL_OP_CIPHER_SERVER_PREFERENCE) {
943 tls1_get_supported_groups(s, &pref, &num_pref);
944 tls1_get_peer_groups(s, &supp, &num_supp);
945 } else {
946 tls1_get_peer_groups(s, &pref, &num_pref);
947 tls1_get_supported_groups(s, &supp, &num_supp);
948 }
3c06513f 949
9e84a42d
DSH		 950 for (k = 0, i = 0; i < num_pref; i++) {
951 uint16_t id = pref[i];
3e373518 952
16f0e91c 953 if (!tls1_in_list(id, supp, num_supp)
0a10825a
BE		 954 || !tls_group_allowed(s, id, SSL_SECOP_CURVE_SHARED))
955 continue;
b50951d3
DSH		 956 if (nmatch == k)
957 return id;
958 k++;
0f113f3e
MC		 959 }
960 if (nmatch == -1)
961 return k;
962 /* Out of range (nmatch > k). */
8841154a 963 return 0;
0f113f3e 964}
d0595f17 965
9e84a42d 966int tls1_set_groups(uint16_t **pext, size_t *pextlen,
de4d764e 967 int *groups, size_t ngroups)
0f113f3e 968{
9e84a42d 969 uint16_t *glist;
0f113f3e
MC		 970 size_t i;
971 /*
9aaecbfc 972 * Bitmap of groups included to detect duplicates: two variables are added
973 * to detect duplicates as some values are more than 32.
0f113f3e 974 */
9aaecbfc 975 unsigned long *dup_list = NULL;
976 unsigned long dup_list_egrp = 0;
977 unsigned long dup_list_dhgrp = 0;
cdb10bae 978
680bd131 979 if (ngroups == 0) {
6849b73c 980 ERR_raise(ERR_LIB_SSL, SSL_R_BAD_LENGTH);
680bd131
MC		 981 return 0;
982 }
e077455e 983 if ((glist = OPENSSL_malloc(ngroups * sizeof(*glist))) == NULL)
0f113f3e 984 return 0;
9e84a42d 985 for (i = 0; i < ngroups; i++) {
0f113f3e 986 unsigned long idmask;
9e84a42d 987 uint16_t id;
4a1b4280 988 id = tls1_nid2group_id(groups[i]);
9aaecbfc 989 if ((id & 0x00FF) >= (sizeof(unsigned long) * 8))
990 goto err;
991 idmask = 1L << (id & 0x00FF);
992 dup_list = (id < 0x100) ? &dup_list_egrp : &dup_list_dhgrp;
993 if (!id || ((*dup_list) & idmask))
994 goto err;
995 *dup_list |= idmask;
9e84a42d 996 glist[i] = id;
0f113f3e 997 }
b548a1f1 998 OPENSSL_free(*pext);
de4d764e 999 *pext = glist;
9e84a42d 1000 *pextlen = ngroups;
0f113f3e 1001 return 1;
9aaecbfc 1002err:
1003 OPENSSL_free(glist);
1004 return 0;
0f113f3e
MC		 1005}
1006
57e7401f 1007# define GROUPLIST_INCREMENT 40
0a8e6c1f 1008# define GROUP_NAME_BUFFER_LENGTH 64
0f113f3e 1009typedef struct {
260009d8
MC		 1010 SSL_CTX *ctx;
1011 size_t gidcnt;
57e7401f
MC		 1012 size_t gidmax;
1013 uint16_t *gid_arr;
260009d8 1014} gid_cb_st;
d0595f17 1015
260009d8 1016static int gid_cb(const char *elem, int len, void *arg)
0f113f3e 1017{
260009d8 1018 gid_cb_st *garg = arg;
0f113f3e 1019 size_t i;
260009d8 1020 uint16_t gid = 0;
0a8e6c1f 1021 char etmp[GROUP_NAME_BUFFER_LENGTH];
260009d8 1022
2747d73c
KR		 1023 if (elem == NULL)
1024 return 0;
57e7401f
MC		 1025 if (garg->gidcnt == garg->gidmax) {
1026 uint16_t *tmp =
1027 OPENSSL_realloc(garg->gid_arr, garg->gidmax + GROUPLIST_INCREMENT);
1028 if (tmp == NULL)
1029 return 0;
1030 garg->gidmax += GROUPLIST_INCREMENT;
1031 garg->gid_arr = tmp;
1032 }
0f113f3e
MC		 1033 if (len > (int)(sizeof(etmp) - 1))
1034 return 0;
1035 memcpy(etmp, elem, len);
1036 etmp[len] = 0;
260009d8
MC		 1037
1038 gid = tls1_group_name2id(garg->ctx, etmp);
ce8822b7
DB		 1039 if (gid == 0) {
1040 ERR_raise_data(ERR_LIB_SSL, ERR_R_PASSED_INVALID_ARGUMENT,
1041 "group '%s' cannot be set", etmp);
0f113f3e 1042 return 0;
ce8822b7 1043 }
260009d8
MC		 1044 for (i = 0; i < garg->gidcnt; i++)
1045 if (garg->gid_arr[i] == gid)
0f113f3e 1046 return 0;
260009d8 1047 garg->gid_arr[garg->gidcnt++] = gid;
0f113f3e
MC		 1048 return 1;
1049}
1050
260009d8
MC		 1051/* Set groups based on a colon separated list */
1052int tls1_set_groups_list(SSL_CTX *ctx, uint16_t **pext, size_t *pextlen,
1053 const char *str)
0f113f3e 1054{
260009d8
MC		 1055 gid_cb_st gcb;
1056 uint16_t *tmparr;
57e7401f 1057 int ret = 0;
260009d8
MC		 1058
1059 gcb.gidcnt = 0;
57e7401f
MC		 1060 gcb.gidmax = GROUPLIST_INCREMENT;
1061 gcb.gid_arr = OPENSSL_malloc(gcb.gidmax * sizeof(*gcb.gid_arr));
1062 if (gcb.gid_arr == NULL)
1063 return 0;
260009d8
MC		 1064 gcb.ctx = ctx;
1065 if (!CONF_parse_list(str, ':', 1, gid_cb, &gcb))
57e7401f
MC		 1066 goto end;
1067 if (pext == NULL) {
1068 ret = 1;
1069 goto end;
1070 }
260009d8
MC		 1071
1072 /*
1073 * gid_cb ensurse there are no duplicates so we can just go ahead and set
1074 * the result
1075 */
1076 tmparr = OPENSSL_memdup(gcb.gid_arr, gcb.gidcnt * sizeof(*tmparr));
1077 if (tmparr == NULL)
57e7401f 1078 goto end;
260009d8
MC		 1079 *pext = tmparr;
1080 *pextlen = gcb.gidcnt;
57e7401f
MC		 1081 ret = 1;
1082 end:
1083 OPENSSL_free(gcb.gid_arr);
1084 return ret;
0f113f3e 1085}
b50951d3 1086
4a1b4280 1087/* Check a group id matches preferences */
38b051a1
TM		 1088int tls1_check_group_id(SSL_CONNECTION *s, uint16_t group_id,
1089 int check_own_groups)
4a1b4280
DSH		 1090 {
1091 const uint16_t *groups;
b50951d3 1092 size_t groups_len;
4a1b4280
DSH		 1093
1094 if (group_id == 0)
1095 return 0;
1096
6447e818 1097 /* Check for Suite B compliance */
555cbb32
TS		 1098 if (tls1_suiteb(s) && s->s3.tmp.new_cipher != NULL) {
1099 unsigned long cid = s->s3.tmp.new_cipher->id;
6447e818
DSH		 1100
1101 if (cid == TLS1_CK_ECDHE_ECDSA_WITH_AES_128_GCM_SHA256) {
0a10825a 1102 if (group_id != OSSL_TLS_GROUP_ID_secp256r1)
6447e818
DSH		 1103 return 0;
1104 } else if (cid == TLS1_CK_ECDHE_ECDSA_WITH_AES_256_GCM_SHA384) {
0a10825a 1105 if (group_id != OSSL_TLS_GROUP_ID_secp384r1)
6447e818
DSH		 1106 return 0;
1107 } else {
1108 /* Should never happen */
1109 return 0;
1110 }
1111 }
b50951d3 1112
dcf8b01f
MC		 1113 if (check_own_groups) {
1114 /* Check group is one of our preferences */
1115 tls1_get_supported_groups(s, &groups, &groups_len);
1116 if (!tls1_in_list(group_id, groups, groups_len))
1117 return 0;
1118 }
4a1b4280 1119
dbc6268f 1120 if (!tls_group_allowed(s, group_id, SSL_SECOP_CURVE_CHECK))
6447e818
DSH		 1121 return 0;
1122
4a1b4280
DSH		 1123 /* For clients, nothing more to check */
1124 if (!s->server)
1125 return 1;
1126
1127 /* Check group is one of peers preferences */
ff6d20a6 1128 tls1_get_peer_groups(s, &groups, &groups_len);
4a1b4280
DSH		 1129
1130 /*
1131 * RFC 4492 does not require the supported elliptic curves extension
1132 * so if it is not sent we can just choose any curve.
1133 * It is invalid to send an empty list in the supported groups
1134 * extension, so groups_len == 0 always means no extension.
1135 */
1136 if (groups_len == 0)
1137 return 1;
b50951d3 1138 return tls1_in_list(group_id, groups, groups_len);
0f113f3e 1139}
d61ff83b 1140
38b051a1 1141void tls1_get_formatlist(SSL_CONNECTION *s, const unsigned char **pformats,
7da160b0 1142 size_t *num_formats)
0f113f3e
MC		 1143{
1144 /*
1145 * If we have a custom point format list use it otherwise use default
1146 */
aff8c126
RS		 1147 if (s->ext.ecpointformats) {
1148 *pformats = s->ext.ecpointformats;
1149 *num_formats = s->ext.ecpointformats_len;
0f113f3e
MC		 1150 } else {
1151 *pformats = ecformats_default;
1152 /* For Suite B we don't support char2 fields */
1153 if (tls1_suiteb(s))
1154 *num_formats = sizeof(ecformats_default) - 1;
1155 else
1156 *num_formats = sizeof(ecformats_default);
1157 }
1158}
1159
dbc6268f 1160/* Check a key is compatible with compression extension */
38b051a1 1161static int tls1_check_pkey_comp(SSL_CONNECTION *s, EVP_PKEY *pkey)
dbc6268f 1162{
dbc6268f
MC		 1163 unsigned char comp_id;
1164 size_t i;
3d34bedf 1165 int point_conv;
dbc6268f
MC		 1166
1167 /* If not an EC key nothing to check */
c2041da8 1168 if (!EVP_PKEY_is_a(pkey, "EC"))
dbc6268f 1169 return 1;
5b5eea4b 1170
dbc6268f
MC		 1171
1172 /* Get required compression id */
3d34bedf
MC		 1173 point_conv = EVP_PKEY_get_ec_point_conv_form(pkey);
1174 if (point_conv == 0)
1175 return 0;
1176 if (point_conv == POINT_CONVERSION_UNCOMPRESSED) {
1177 comp_id = TLSEXT_ECPOINTFORMAT_uncompressed;
38b051a1 1178 } else if (SSL_CONNECTION_IS_TLS13(s)) {
5b5eea4b
SL		 1179 /*
1180 * ec_point_formats extension is not used in TLSv1.3 so we ignore
1181 * this check.
1182 */
1183 return 1;
dbc6268f 1184 } else {
3d34bedf 1185 int field_type = EVP_PKEY_get_field_type(pkey);
dbc6268f 1186
3d34bedf 1187 if (field_type == NID_X9_62_prime_field)
dbc6268f 1188 comp_id = TLSEXT_ECPOINTFORMAT_ansiX962_compressed_prime;
3d34bedf 1189 else if (field_type == NID_X9_62_characteristic_two_field)
dbc6268f
MC		 1190 comp_id = TLSEXT_ECPOINTFORMAT_ansiX962_compressed_char2;
1191 else
1192 return 0;
1193 }
1194 /*
1195 * If point formats extension present check it, otherwise everything is
1196 * supported (see RFC4492).
1197 */
cd0fb43c 1198 if (s->ext.peer_ecpointformats == NULL)
dbc6268f
MC		 1199 return 1;
1200
cd0fb43c
MC		 1201 for (i = 0; i < s->ext.peer_ecpointformats_len; i++) {
1202 if (s->ext.peer_ecpointformats[i] == comp_id)
dbc6268f
MC		 1203 return 1;
1204 }
1205 return 0;
1206}
1207
1208/* Return group id of a key */
1209static uint16_t tls1_get_group_id(EVP_PKEY *pkey)
1210{
d8975dec 1211 int curve_nid = ssl_get_EC_curve_nid(pkey);
dbc6268f 1212
c2041da8 1213 if (curve_nid == NID_undef)
dbc6268f 1214 return 0;
c2041da8 1215 return tls1_nid2group_id(curve_nid);
dbc6268f
MC		 1216}
1217
0f113f3e
MC		 1218/*
1219 * Check cert parameters compatible with extensions: currently just checks EC
1220 * certificates have compatible curves and compression.
d61ff83b 1221 */
38b051a1 1222static int tls1_check_cert_param(SSL_CONNECTION *s, X509 *x, int check_ee_md)
0f113f3e 1223{
4a1b4280 1224 uint16_t group_id;
0f113f3e 1225 EVP_PKEY *pkey;
8382fd3a 1226 pkey = X509_get0_pubkey(x);
4a1b4280 1227 if (pkey == NULL)
0f113f3e
MC		 1228 return 0;
1229 /* If not EC nothing to do */
c2041da8 1230 if (!EVP_PKEY_is_a(pkey, "EC"))
0f113f3e 1231 return 1;
4a1b4280
DSH		 1232 /* Check compression */
1233 if (!tls1_check_pkey_comp(s, pkey))
0f113f3e 1234 return 0;
4a1b4280 1235 group_id = tls1_get_group_id(pkey);
dcf8b01f
MC		 1236 /*
1237 * For a server we allow the certificate to not be in our list of supported
1238 * groups.
1239 */
1240 if (!tls1_check_group_id(s, group_id, !s->server))
0f113f3e
MC		 1241 return 0;
1242 /*
1243 * Special case for suite B. We *MUST* sign using SHA256+P-256 or
9195ddcd 1244 * SHA384+P-384.
0f113f3e 1245 */
9195ddcd 1246 if (check_ee_md && tls1_suiteb(s)) {
0f113f3e
MC		 1247 int check_md;
1248 size_t i;
9e84a42d 1249
0f113f3e 1250 /* Check to see we have necessary signing algorithm */
0a10825a 1251 if (group_id == OSSL_TLS_GROUP_ID_secp256r1)
0f113f3e 1252 check_md = NID_ecdsa_with_SHA256;
0a10825a 1253 else if (group_id == OSSL_TLS_GROUP_ID_secp384r1)
0f113f3e
MC		 1254 check_md = NID_ecdsa_with_SHA384;
1255 else
1256 return 0; /* Should never happen */
29948ac8
BK		 1257 for (i = 0; i < s->shared_sigalgslen; i++) {
1258 if (check_md == s->shared_sigalgs[i]->sigandhash)
1e331727 1259 return 1;
4a1b4280
DSH		 1260 }
1261 return 0;
0f113f3e 1262 }
4a1b4280 1263 return 1;
0f113f3e
MC		 1264}
1265
6977e8ee 1266/*
8483a003 1267 * tls1_check_ec_tmp_key - Check EC temporary key compatibility
6977e8ee
KR		 1268 * @s: SSL connection
1269 * @cid: Cipher ID we're considering using
1270 *
1271 * Checks that the kECDHE cipher suite we're considering using
1272 * is compatible with the client extensions.
1273 *
1274 * Returns 0 when the cipher can't be used or 1 when it can.
1275 */
38b051a1 1276int tls1_check_ec_tmp_key(SSL_CONNECTION *s, unsigned long cid)
0f113f3e 1277{
4a1b4280
DSH		 1278 /* If not Suite B just need a shared group */
1279 if (!tls1_suiteb(s))
1280 return tls1_shared_group(s, 0) != 0;
0f113f3e
MC		 1281 /*
1282 * If Suite B, AES128 MUST use P-256 and AES256 MUST use P-384, no other
1283 * curves permitted.
1284 */
4a1b4280 1285 if (cid == TLS1_CK_ECDHE_ECDSA_WITH_AES_128_GCM_SHA256)
0a10825a 1286 return tls1_check_group_id(s, OSSL_TLS_GROUP_ID_secp256r1, 1);
4a1b4280 1287 if (cid == TLS1_CK_ECDHE_ECDSA_WITH_AES_256_GCM_SHA384)
0a10825a 1288 return tls1_check_group_id(s, OSSL_TLS_GROUP_ID_secp384r1, 1);
4a1b4280
DSH		 1289
1290 return 0;
0f113f3e 1291}
d0595f17 1292
703bcee0 1293/* Default sigalg schemes */
98c792d1 1294static const uint16_t tls12_sigalgs[] = {
703bcee0
MC		 1295 TLSEXT_SIGALG_ecdsa_secp256r1_sha256,
1296 TLSEXT_SIGALG_ecdsa_secp384r1_sha384,
1297 TLSEXT_SIGALG_ecdsa_secp521r1_sha512,
3d234c9e 1298 TLSEXT_SIGALG_ed25519,
0e1d6ecf 1299 TLSEXT_SIGALG_ed448,
0a10825a
BE		 1300 TLSEXT_SIGALG_ecdsa_brainpoolP256r1_sha256,
1301 TLSEXT_SIGALG_ecdsa_brainpoolP384r1_sha384,
1302 TLSEXT_SIGALG_ecdsa_brainpoolP512r1_sha512,
0f113f3e 1303
f55e99f7
BK		 1304 TLSEXT_SIGALG_rsa_pss_pss_sha256,
1305 TLSEXT_SIGALG_rsa_pss_pss_sha384,
1306 TLSEXT_SIGALG_rsa_pss_pss_sha512,
1307 TLSEXT_SIGALG_rsa_pss_rsae_sha256,
1308 TLSEXT_SIGALG_rsa_pss_rsae_sha384,
1309 TLSEXT_SIGALG_rsa_pss_rsae_sha512,
536199ec 1310
703bcee0
MC		 1311 TLSEXT_SIGALG_rsa_pkcs1_sha256,
1312 TLSEXT_SIGALG_rsa_pkcs1_sha384,
1313 TLSEXT_SIGALG_rsa_pkcs1_sha512,
0f113f3e 1314
d8311fc9 1315 TLSEXT_SIGALG_ecdsa_sha224,
42ab2230 1316 TLSEXT_SIGALG_ecdsa_sha1,
462f4f4b 1317
d8311fc9 1318 TLSEXT_SIGALG_rsa_pkcs1_sha224,
42ab2230 1319 TLSEXT_SIGALG_rsa_pkcs1_sha1,
e376242d 1320
d8311fc9 1321 TLSEXT_SIGALG_dsa_sha224,
42ab2230
MC		 1322 TLSEXT_SIGALG_dsa_sha1,
1323
703bcee0
MC		 1324 TLSEXT_SIGALG_dsa_sha256,
1325 TLSEXT_SIGALG_dsa_sha384,
41f10305 1326 TLSEXT_SIGALG_dsa_sha512,
e376242d 1327
41f10305 1328#ifndef OPENSSL_NO_GOST
6f892296
NM		 1329 TLSEXT_SIGALG_gostr34102012_256_intrinsic,
1330 TLSEXT_SIGALG_gostr34102012_512_intrinsic,
41f10305
DB		 1331 TLSEXT_SIGALG_gostr34102012_256_gostr34112012_256,
1332 TLSEXT_SIGALG_gostr34102012_512_gostr34112012_512,
1333 TLSEXT_SIGALG_gostr34102001_gostr3411,
5eeb6c6e 1334#endif
fc101f88 1335};
0f113f3e 1336
462f4f4b 1337
98c792d1 1338static const uint16_t suiteb_sigalgs[] = {
703bcee0
MC		 1339 TLSEXT_SIGALG_ecdsa_secp256r1_sha256,
1340 TLSEXT_SIGALG_ecdsa_secp384r1_sha384
2ea80354 1341};
aff8c126 1342
7a531ee4 1343static const SIGALG_LOOKUP sigalg_lookup_tbl[] = {
edbfba1a 1344 {"ecdsa_secp256r1_sha256", TLSEXT_SIGALG_ecdsa_secp256r1_sha256,
17ae384e 1345 NID_sha256, SSL_MD_SHA256_IDX, EVP_PKEY_EC, SSL_PKEY_ECC,
263ff2c9 1346 NID_ecdsa_with_SHA256, NID_X9_62_prime256v1, 1},
edbfba1a 1347 {"ecdsa_secp384r1_sha384", TLSEXT_SIGALG_ecdsa_secp384r1_sha384,
17ae384e 1348 NID_sha384, SSL_MD_SHA384_IDX, EVP_PKEY_EC, SSL_PKEY_ECC,
263ff2c9 1349 NID_ecdsa_with_SHA384, NID_secp384r1, 1},
edbfba1a 1350 {"ecdsa_secp521r1_sha512", TLSEXT_SIGALG_ecdsa_secp521r1_sha512,
17ae384e 1351 NID_sha512, SSL_MD_SHA512_IDX, EVP_PKEY_EC, SSL_PKEY_ECC,
263ff2c9 1352 NID_ecdsa_with_SHA512, NID_secp521r1, 1},
b04d4e38 1353 {"ed25519", TLSEXT_SIGALG_ed25519,
d2916a5b 1354 NID_undef, -1, EVP_PKEY_ED25519, SSL_PKEY_ED25519,
263ff2c9 1355 NID_undef, NID_undef, 1},
0e1d6ecf
MC		 1356 {"ed448", TLSEXT_SIGALG_ed448,
1357 NID_undef, -1, EVP_PKEY_ED448, SSL_PKEY_ED448,
263ff2c9 1358 NID_undef, NID_undef, 1},
d8311fc9
MC		 1359 {NULL, TLSEXT_SIGALG_ecdsa_sha224,
1360 NID_sha224, SSL_MD_SHA224_IDX, EVP_PKEY_EC, SSL_PKEY_ECC,
263ff2c9 1361 NID_ecdsa_with_SHA224, NID_undef, 1},
edbfba1a 1362 {NULL, TLSEXT_SIGALG_ecdsa_sha1,
17ae384e 1363 NID_sha1, SSL_MD_SHA1_IDX, EVP_PKEY_EC, SSL_PKEY_ECC,
263ff2c9 1364 NID_ecdsa_with_SHA1, NID_undef, 1},
0a10825a
BE		 1365 {"ecdsa_brainpoolP256r1_sha256", TLSEXT_SIGALG_ecdsa_brainpoolP256r1_sha256,
1366 NID_sha256, SSL_MD_SHA256_IDX, EVP_PKEY_EC, SSL_PKEY_ECC,
1367 NID_ecdsa_with_SHA256, NID_brainpoolP256r1, 1},
1368 {"ecdsa_brainpoolP384r1_sha384", TLSEXT_SIGALG_ecdsa_brainpoolP384r1_sha384,
1369 NID_sha384, SSL_MD_SHA384_IDX, EVP_PKEY_EC, SSL_PKEY_ECC,
1370 NID_ecdsa_with_SHA384, NID_brainpoolP384r1, 1},
1371 {"ecdsa_brainpoolP512r1_sha512", TLSEXT_SIGALG_ecdsa_brainpoolP512r1_sha512,
1372 NID_sha512, SSL_MD_SHA512_IDX, EVP_PKEY_EC, SSL_PKEY_ECC,
1373 NID_ecdsa_with_SHA512, NID_brainpoolP512r1, 1},
f55e99f7
BK		 1374 {"rsa_pss_rsae_sha256", TLSEXT_SIGALG_rsa_pss_rsae_sha256,
1375 NID_sha256, SSL_MD_SHA256_IDX, EVP_PKEY_RSA_PSS, SSL_PKEY_RSA,
263ff2c9 1376 NID_undef, NID_undef, 1},
f55e99f7
BK		 1377 {"rsa_pss_rsae_sha384", TLSEXT_SIGALG_rsa_pss_rsae_sha384,
1378 NID_sha384, SSL_MD_SHA384_IDX, EVP_PKEY_RSA_PSS, SSL_PKEY_RSA,
263ff2c9 1379 NID_undef, NID_undef, 1},
f55e99f7
BK		 1380 {"rsa_pss_rsae_sha512", TLSEXT_SIGALG_rsa_pss_rsae_sha512,
1381 NID_sha512, SSL_MD_SHA512_IDX, EVP_PKEY_RSA_PSS, SSL_PKEY_RSA,
263ff2c9 1382 NID_undef, NID_undef, 1},
f55e99f7 1383 {"rsa_pss_pss_sha256", TLSEXT_SIGALG_rsa_pss_pss_sha256,
17ae384e 1384 NID_sha256, SSL_MD_SHA256_IDX, EVP_PKEY_RSA_PSS, SSL_PKEY_RSA_PSS_SIGN,
263ff2c9 1385 NID_undef, NID_undef, 1},
f55e99f7 1386 {"rsa_pss_pss_sha384", TLSEXT_SIGALG_rsa_pss_pss_sha384,
17ae384e 1387 NID_sha384, SSL_MD_SHA384_IDX, EVP_PKEY_RSA_PSS, SSL_PKEY_RSA_PSS_SIGN,
263ff2c9 1388 NID_undef, NID_undef, 1},
f55e99f7 1389 {"rsa_pss_pss_sha512", TLSEXT_SIGALG_rsa_pss_pss_sha512,
17ae384e 1390 NID_sha512, SSL_MD_SHA512_IDX, EVP_PKEY_RSA_PSS, SSL_PKEY_RSA_PSS_SIGN,
263ff2c9 1391 NID_undef, NID_undef, 1},
edbfba1a 1392 {"rsa_pkcs1_sha256", TLSEXT_SIGALG_rsa_pkcs1_sha256,
d0ff28f8 1393 NID_sha256, SSL_MD_SHA256_IDX, EVP_PKEY_RSA, SSL_PKEY_RSA,
263ff2c9 1394 NID_sha256WithRSAEncryption, NID_undef, 1},
edbfba1a 1395 {"rsa_pkcs1_sha384", TLSEXT_SIGALG_rsa_pkcs1_sha384,
d0ff28f8 1396 NID_sha384, SSL_MD_SHA384_IDX, EVP_PKEY_RSA, SSL_PKEY_RSA,
263ff2c9 1397 NID_sha384WithRSAEncryption, NID_undef, 1},
edbfba1a 1398 {"rsa_pkcs1_sha512", TLSEXT_SIGALG_rsa_pkcs1_sha512,
d0ff28f8 1399 NID_sha512, SSL_MD_SHA512_IDX, EVP_PKEY_RSA, SSL_PKEY_RSA,
263ff2c9 1400 NID_sha512WithRSAEncryption, NID_undef, 1},
d8311fc9
MC		 1401 {"rsa_pkcs1_sha224", TLSEXT_SIGALG_rsa_pkcs1_sha224,
1402 NID_sha224, SSL_MD_SHA224_IDX, EVP_PKEY_RSA, SSL_PKEY_RSA,
263ff2c9 1403 NID_sha224WithRSAEncryption, NID_undef, 1},
edbfba1a 1404 {"rsa_pkcs1_sha1", TLSEXT_SIGALG_rsa_pkcs1_sha1,
d0ff28f8 1405 NID_sha1, SSL_MD_SHA1_IDX, EVP_PKEY_RSA, SSL_PKEY_RSA,
263ff2c9 1406 NID_sha1WithRSAEncryption, NID_undef, 1},
edbfba1a 1407 {NULL, TLSEXT_SIGALG_dsa_sha256,
17ae384e 1408 NID_sha256, SSL_MD_SHA256_IDX, EVP_PKEY_DSA, SSL_PKEY_DSA_SIGN,
263ff2c9 1409 NID_dsa_with_SHA256, NID_undef, 1},
edbfba1a 1410 {NULL, TLSEXT_SIGALG_dsa_sha384,
17ae384e 1411 NID_sha384, SSL_MD_SHA384_IDX, EVP_PKEY_DSA, SSL_PKEY_DSA_SIGN,
263ff2c9 1412 NID_undef, NID_undef, 1},
edbfba1a 1413 {NULL, TLSEXT_SIGALG_dsa_sha512,
17ae384e 1414 NID_sha512, SSL_MD_SHA512_IDX, EVP_PKEY_DSA, SSL_PKEY_DSA_SIGN,
263ff2c9 1415 NID_undef, NID_undef, 1},
d8311fc9
MC		 1416 {NULL, TLSEXT_SIGALG_dsa_sha224,
1417 NID_sha224, SSL_MD_SHA224_IDX, EVP_PKEY_DSA, SSL_PKEY_DSA_SIGN,
263ff2c9 1418 NID_undef, NID_undef, 1},
edbfba1a 1419 {NULL, TLSEXT_SIGALG_dsa_sha1,
17ae384e 1420 NID_sha1, SSL_MD_SHA1_IDX, EVP_PKEY_DSA, SSL_PKEY_DSA_SIGN,
263ff2c9 1421 NID_dsaWithSHA1, NID_undef, 1},
5eeb6c6e 1422#ifndef OPENSSL_NO_GOST
6f892296
NM		 1423 {NULL, TLSEXT_SIGALG_gostr34102012_256_intrinsic,
1424 NID_id_GostR3411_2012_256, SSL_MD_GOST12_256_IDX,
1425 NID_id_GostR3410_2012_256, SSL_PKEY_GOST12_256,
263ff2c9 1426 NID_undef, NID_undef, 1},
6f892296
NM		 1427 {NULL, TLSEXT_SIGALG_gostr34102012_512_intrinsic,
1428 NID_id_GostR3411_2012_512, SSL_MD_GOST12_512_IDX,
1429 NID_id_GostR3410_2012_512, SSL_PKEY_GOST12_512,
263ff2c9 1430 NID_undef, NID_undef, 1},
edbfba1a 1431 {NULL, TLSEXT_SIGALG_gostr34102012_256_gostr34112012_256,
17ae384e
DSH		 1432 NID_id_GostR3411_2012_256, SSL_MD_GOST12_256_IDX,
1433 NID_id_GostR3410_2012_256, SSL_PKEY_GOST12_256,
263ff2c9 1434 NID_undef, NID_undef, 1},
edbfba1a 1435 {NULL, TLSEXT_SIGALG_gostr34102012_512_gostr34112012_512,
17ae384e
DSH		 1436 NID_id_GostR3411_2012_512, SSL_MD_GOST12_512_IDX,
1437 NID_id_GostR3410_2012_512, SSL_PKEY_GOST12_512,
263ff2c9 1438 NID_undef, NID_undef, 1},
edbfba1a 1439 {NULL, TLSEXT_SIGALG_gostr34102001_gostr3411,
17ae384e
DSH		 1440 NID_id_GostR3411_94, SSL_MD_GOST94_IDX,
1441 NID_id_GostR3410_2001, SSL_PKEY_GOST01,
263ff2c9 1442 NID_undef, NID_undef, 1}
5eeb6c6e 1443#endif
703bcee0 1444};
0972bc5c
DSH		 1445/* Legacy sigalgs for TLS < 1.2 RSA TLS signatures */
1446static const SIGALG_LOOKUP legacy_rsa_sigalg = {
1447 "rsa_pkcs1_md5_sha1", 0,
1448 NID_md5_sha1, SSL_MD_MD5_SHA1_IDX,
1449 EVP_PKEY_RSA, SSL_PKEY_RSA,
263ff2c9 1450 NID_undef, NID_undef, 1
0972bc5c
DSH		 1451};
1452
1453/*
1454 * Default signature algorithm values used if signature algorithms not present.
1455 * From RFC5246. Note: order must match certificate index order.
1456 */
1457static const uint16_t tls_default_sigalg[] = {
1458 TLSEXT_SIGALG_rsa_pkcs1_sha1, /* SSL_PKEY_RSA */
045d078a 1459 0, /* SSL_PKEY_RSA_PSS_SIGN */
0972bc5c
DSH		 1460 TLSEXT_SIGALG_dsa_sha1, /* SSL_PKEY_DSA_SIGN */
1461 TLSEXT_SIGALG_ecdsa_sha1, /* SSL_PKEY_ECC */
1462 TLSEXT_SIGALG_gostr34102001_gostr3411, /* SSL_PKEY_GOST01 */
6f892296
NM		 1463 TLSEXT_SIGALG_gostr34102012_256_intrinsic, /* SSL_PKEY_GOST12_256 */
1464 TLSEXT_SIGALG_gostr34102012_512_intrinsic, /* SSL_PKEY_GOST12_512 */
0e1d6ecf
MC		 1465 0, /* SSL_PKEY_ED25519 */
1466 0, /* SSL_PKEY_ED448 */
0972bc5c 1467};
703bcee0 1468
ee58915c 1469int ssl_setup_sigalgs(SSL_CTX *ctx)
263ff2c9 1470{
ee58915c 1471 size_t i, cache_idx, sigalgs_len;
263ff2c9 1472 const SIGALG_LOOKUP *lu;
ee58915c
MB		 1473 SIGALG_LOOKUP *cache = NULL;
1474 uint16_t *tls12_sigalgs_list = NULL;
263ff2c9
MC		 1475 EVP_PKEY *tmpkey = EVP_PKEY_new();
1476 int ret = 0;
1477
ee58915c
MB		 1478 if (ctx == NULL)
1479 goto err;
1480
1481 sigalgs_len = OSSL_NELEM(sigalg_lookup_tbl) + ctx->sigalg_list_len;
1482
1483 cache = OPENSSL_malloc(sizeof(const SIGALG_LOOKUP) * sigalgs_len);
263ff2c9
MC		 1484 if (cache == NULL || tmpkey == NULL)
1485 goto err;
1486
ee58915c
MB		 1487 tls12_sigalgs_list = OPENSSL_malloc(sizeof(uint16_t) * sigalgs_len);
1488 if (tls12_sigalgs_list == NULL)
1489 goto err;
1490
263ff2c9 1491 ERR_set_mark();
ee58915c 1492 /* First fill cache and tls12_sigalgs list from legacy algorithm list */
263ff2c9
MC		 1493 for (i = 0, lu = sigalg_lookup_tbl;
1494 i < OSSL_NELEM(sigalg_lookup_tbl); lu++, i++) {
1495 EVP_PKEY_CTX *pctx;
1496
1497 cache[i] = *lu;
ee58915c 1498 tls12_sigalgs_list[i] = tls12_sigalgs[i];
263ff2c9
MC		 1499
1500 /*
1501 * Check hash is available.
57e7401f 1502 * This test is not perfect. A provider could have support
263ff2c9
MC		 1503 * for a signature scheme, but not a particular hash. However the hash
1504 * could be available from some other loaded provider. In that case it
1505 * could be that the signature is available, and the hash is available
1506 * independently - but not as a combination. We ignore this for now.
1507 */
1508 if (lu->hash != NID_undef
1509 && ctx->ssl_digest_methods[lu->hash_idx] == NULL) {
1510 cache[i].enabled = 0;
1511 continue;
1512 }
1513
1514 if (!EVP_PKEY_set_type(tmpkey, lu->sig)) {
1515 cache[i].enabled = 0;
1516 continue;
1517 }
1518 pctx = EVP_PKEY_CTX_new_from_pkey(ctx->libctx, tmpkey, ctx->propq);
1519 /* If unable to create pctx we assume the sig algorithm is unavailable */
1520 if (pctx == NULL)
1521 cache[i].enabled = 0;
1522 EVP_PKEY_CTX_free(pctx);
1523 }
ee58915c
MB		 1524
1525 /* Now complete cache and tls12_sigalgs list with provider sig information */
1526 cache_idx = OSSL_NELEM(sigalg_lookup_tbl);
1527 for (i = 0; i < ctx->sigalg_list_len; i++) {
1528 TLS_SIGALG_INFO si = ctx->sigalg_list[i];
1529 cache[cache_idx].name = si.name;
1530 cache[cache_idx].sigalg = si.code_point;
1531 tls12_sigalgs_list[cache_idx] = si.code_point;
1532 cache[cache_idx].hash = si.hash_name?OBJ_txt2nid(si.hash_name):NID_undef;
1533 cache[cache_idx].hash_idx = ssl_get_md_idx(cache[cache_idx].hash);
1534 cache[cache_idx].sig = OBJ_txt2nid(si.sigalg_name);
1535 cache[cache_idx].sig_idx = i + SSL_PKEY_NUM;
1536 cache[cache_idx].sigandhash = OBJ_txt2nid(si.sigalg_name);
1537 cache[cache_idx].curve = NID_undef;
1538 /* all provided sigalgs are enabled by load */
1539 cache[cache_idx].enabled = 1;
1540 cache_idx++;
1541 }
263ff2c9
MC		 1542 ERR_pop_to_mark();
1543 ctx->sigalg_lookup_cache = cache;
ee58915c
MB		 1544 ctx->tls12_sigalgs = tls12_sigalgs_list;
1545 ctx->tls12_sigalgs_len = sigalgs_len;
263ff2c9 1546 cache = NULL;
ee58915c 1547 tls12_sigalgs_list = NULL;
263ff2c9
MC		 1548
1549 ret = 1;
1550 err:
1551 OPENSSL_free(cache);
ee58915c 1552 OPENSSL_free(tls12_sigalgs_list);
263ff2c9
MC		 1553 EVP_PKEY_free(tmpkey);
1554 return ret;
1555}
1556
4d43ee28 1557/* Lookup TLS signature algorithm */
38b051a1
TM		 1558static const SIGALG_LOOKUP *tls1_lookup_sigalg(const SSL_CONNECTION *s,
1559 uint16_t sigalg)
703bcee0
MC		 1560{
1561 size_t i;
263ff2c9 1562 const SIGALG_LOOKUP *lu;
703bcee0 1563
38b051a1 1564 for (i = 0, lu = SSL_CONNECTION_GET_CTX(s)->sigalg_lookup_cache;
ee58915c 1565 i < SSL_CONNECTION_GET_CTX(s)->tls12_sigalgs_len;
263ff2c9 1566 lu++, i++) {
54e3efff
MC		 1567 if (lu->sigalg == sigalg) {
1568 if (!lu->enabled)
1569 return NULL;
263ff2c9 1570 return lu;
54e3efff 1571 }
703bcee0 1572 }
4d43ee28
DSH		 1573 return NULL;
1574}
168067b6 1575/* Lookup hash: return 0 if invalid or not enabled */
c8f6c28a 1576int tls1_lookup_md(SSL_CTX *ctx, const SIGALG_LOOKUP *lu, const EVP_MD **pmd)
168067b6
DSH		 1577{
1578 const EVP_MD *md;
38b051a1 1579
168067b6
DSH		 1580 if (lu == NULL)
1581 return 0;
1582 /* lu->hash == NID_undef means no associated digest */
1583 if (lu->hash == NID_undef) {
1584 md = NULL;
1585 } else {
c8f6c28a 1586 md = ssl_md(ctx, lu->hash_idx);
168067b6
DSH		 1587 if (md == NULL)
1588 return 0;
1589 }
1590 if (pmd)
1591 *pmd = md;
1592 return 1;
1593}
1594
0fe3db25
NR		 1595/*
1596 * Check if key is large enough to generate RSA-PSS signature.
1597 *
1598 * The key must greater than or equal to 2 * hash length + 2.
1599 * SHA512 has a hash length of 64 bytes, which is incompatible
1600 * with a 128 byte (1024 bit) key.
1601 */
ed576acd 1602#define RSA_PSS_MINIMUM_KEY_SIZE(md) (2 * EVP_MD_get_size(md) + 2)
c5f87134 1603static int rsa_pss_check_min_key_size(SSL_CTX *ctx, const EVP_PKEY *pkey,
c8f6c28a 1604 const SIGALG_LOOKUP *lu)
0fe3db25
NR		 1605{
1606 const EVP_MD *md;
1607
c5f87134 1608 if (pkey == NULL)
0fe3db25 1609 return 0;
c8f6c28a 1610 if (!tls1_lookup_md(ctx, lu, &md) || md == NULL)
0fe3db25 1611 return 0;
ed576acd 1612 if (EVP_PKEY_get_size(pkey) < RSA_PSS_MINIMUM_KEY_SIZE(md))
0fe3db25
NR		 1613 return 0;
1614 return 1;
1615}
1616
0972bc5c 1617/*
b0031e5d
KR		 1618 * Returns a signature algorithm when the peer did not send a list of supported
1619 * signature algorithms. The signature algorithm is fixed for the certificate
1620 * type. |idx| is a certificate type index (SSL_PKEY_*). When |idx| is -1 the
1621 * certificate type from |s| will be used.
1622 * Returns the signature algorithm to use, or NULL on error.
0972bc5c 1623 */
38b051a1
TM		 1624static const SIGALG_LOOKUP *tls1_get_legacy_sigalg(const SSL_CONNECTION *s,
1625 int idx)
0972bc5c 1626{
7f6b466b
DSH		 1627 if (idx == -1) {
1628 if (s->server) {
1629 size_t i;
1630
1631 /* Work out index corresponding to ciphersuite */
ee58915c
MB		 1632 for (i = 0; i < s->ssl_pkey_num; i++) {
1633 const SSL_CERT_LOOKUP *clu
1634 = ssl_cert_lookup_by_idx(i, SSL_CONNECTION_GET_CTX(s));
7f6b466b 1635
ed5b26ce
P		 1636 if (clu == NULL)
1637 continue;
555cbb32 1638 if (clu->amask & s->s3.tmp.new_cipher->algorithm_auth) {
7f6b466b
DSH		 1639 idx = i;
1640 break;
1641 }
1642 }
1f65c045
DB		 1643
1644 /*
1645 * Some GOST ciphersuites allow more than one signature algorithms
1646 * */
555cbb32 1647 if (idx == SSL_PKEY_GOST01 && s->s3.tmp.new_cipher->algorithm_auth != SSL_aGOST01) {
1f65c045
DB		 1648 int real_idx;
1649
1650 for (real_idx = SSL_PKEY_GOST12_512; real_idx >= SSL_PKEY_GOST01;
1651 real_idx--) {
1652 if (s->cert->pkeys[real_idx].privatekey != NULL) {
1653 idx = real_idx;
1654 break;
1655 }
1656 }
1657 }
5a5530a2
DB		 1658 /*
1659 * As both SSL_PKEY_GOST12_512 and SSL_PKEY_GOST12_256 indices can be used
1660 * with new (aGOST12-only) ciphersuites, we should find out which one is available really.
1661 */
1662 else if (idx == SSL_PKEY_GOST12_256) {
1663 int real_idx;
1664
1665 for (real_idx = SSL_PKEY_GOST12_512; real_idx >= SSL_PKEY_GOST12_256;
1666 real_idx--) {
1667 if (s->cert->pkeys[real_idx].privatekey != NULL) {
1668 idx = real_idx;
1669 break;
1670 }
1671 }
1672 }
7f6b466b
DSH		 1673 } else {
1674 idx = s->cert->key - s->cert->pkeys;
1675 }
1676 }
0972bc5c
DSH		 1677 if (idx < 0 || idx >= (int)OSSL_NELEM(tls_default_sigalg))
1678 return NULL;
ee58915c 1679
0972bc5c 1680 if (SSL_USE_SIGALGS(s) || idx != SSL_PKEY_RSA) {
263ff2c9 1681 const SIGALG_LOOKUP *lu = tls1_lookup_sigalg(s, tls_default_sigalg[idx]);
0972bc5c 1682
54e3efff
MC		 1683 if (lu == NULL)
1684 return NULL;
38b051a1 1685 if (!tls1_lookup_md(SSL_CONNECTION_GET_CTX(s), lu, NULL))
0972bc5c 1686 return NULL;
b0031e5d
KR		 1687 if (!tls12_sigalg_allowed(s, SSL_SECOP_SIGALG_SUPPORTED, lu))
1688 return NULL;
0972bc5c
DSH		 1689 return lu;
1690 }
b0031e5d
KR		 1691 if (!tls12_sigalg_allowed(s, SSL_SECOP_SIGALG_SUPPORTED, &legacy_rsa_sigalg))
1692 return NULL;
0972bc5c
DSH		 1693 return &legacy_rsa_sigalg;
1694}
1695/* Set peer sigalg based key type */
38b051a1 1696int tls1_set_peer_legacy_sigalg(SSL_CONNECTION *s, const EVP_PKEY *pkey)
0972bc5c 1697{
52fd27f9
DSH		 1698 size_t idx;
1699 const SIGALG_LOOKUP *lu;
0972bc5c 1700
ee58915c 1701 if (ssl_cert_lookup_by_pkey(pkey, &idx, SSL_CONNECTION_GET_CTX(s)) == NULL)
52fd27f9
DSH		 1702 return 0;
1703 lu = tls1_get_legacy_sigalg(s, idx);
0972bc5c
DSH		 1704 if (lu == NULL)
1705 return 0;
555cbb32 1706 s->s3.tmp.peer_sigalg = lu;
0972bc5c
DSH		 1707 return 1;
1708}
703bcee0 1709
38b051a1 1710size_t tls12_get_psigalgs(SSL_CONNECTION *s, int sent, const uint16_t **psigs)
0f113f3e
MC		 1711{
1712 /*
1713 * If Suite B mode use Suite B sigalgs only, ignore any other
1714 * preferences.
1715 */
0f113f3e
MC		 1716 switch (tls1_suiteb(s)) {
1717 case SSL_CERT_FLAG_SUITEB_128_LOS:
1718 *psigs = suiteb_sigalgs;
7a531ee4 1719 return OSSL_NELEM(suiteb_sigalgs);
0f113f3e
MC		 1720
1721 case SSL_CERT_FLAG_SUITEB_128_LOS_ONLY:
1722 *psigs = suiteb_sigalgs;
7a531ee4 1723 return 1;
0f113f3e
MC		 1724
1725 case SSL_CERT_FLAG_SUITEB_192_LOS:
7a531ee4
MC		 1726 *psigs = suiteb_sigalgs + 1;
1727 return 1;
0f113f3e 1728 }
a9669ddc
DSH		 1729 /*
1730 * We use client_sigalgs (if not NULL) if we're a server
1731 * and sending a certificate request or if we're a client and
1732 * determining which shared algorithm to use.
1733 */
1734 if ((s->server == sent) && s->cert->client_sigalgs != NULL) {
0f113f3e
MC		 1735 *psigs = s->cert->client_sigalgs;
1736 return s->cert->client_sigalgslen;
1737 } else if (s->cert->conf_sigalgs) {
1738 *psigs = s->cert->conf_sigalgs;
1739 return s->cert->conf_sigalgslen;
1740 } else {
ee58915c
MB		 1741 *psigs = SSL_CONNECTION_GET_CTX(s)->tls12_sigalgs;
1742 return SSL_CONNECTION_GET_CTX(s)->tls12_sigalgs_len;
0f113f3e
MC		 1743 }
1744}
1745
de4dc598
MC		 1746/*
1747 * Called by servers only. Checks that we have a sig alg that supports the
1748 * specified EC curve.
1749 */
38b051a1 1750int tls_check_sigalg_curve(const SSL_CONNECTION *s, int curve)
de4dc598
MC		 1751{
1752 const uint16_t *sigs;
1753 size_t siglen, i;
1754
1755 if (s->cert->conf_sigalgs) {
1756 sigs = s->cert->conf_sigalgs;
1757 siglen = s->cert->conf_sigalgslen;
1758 } else {
ee58915c
MB		 1759 sigs = SSL_CONNECTION_GET_CTX(s)->tls12_sigalgs;
1760 siglen = SSL_CONNECTION_GET_CTX(s)->tls12_sigalgs_len;
de4dc598
MC		 1761 }
1762
1763 for (i = 0; i < siglen; i++) {
263ff2c9 1764 const SIGALG_LOOKUP *lu = tls1_lookup_sigalg(s, sigs[i]);
de4dc598
MC		 1765
1766 if (lu == NULL)
1767 continue;
1768 if (lu->sig == EVP_PKEY_EC
1769 && lu->curve != NID_undef
1770 && curve == lu->curve)
1771 return 1;
1772 }
1773
1774 return 0;
1775}
1776
620c97b6
KR		 1777/*
1778 * Return the number of security bits for the signature algorithm, or 0 on
1779 * error.
1780 */
1781static int sigalg_security_bits(SSL_CTX *ctx, const SIGALG_LOOKUP *lu)
1782{
1783 const EVP_MD *md = NULL;
1784 int secbits = 0;
1785
1786 if (!tls1_lookup_md(ctx, lu, &md))
1787 return 0;
1788 if (md != NULL)
1789 {
ed576acd 1790 int md_type = EVP_MD_get_type(md);
aba03ae5 1791
620c97b6 1792 /* Security bits: half digest bits */
ed576acd 1793 secbits = EVP_MD_get_size(md) * 4;
aba03ae5
KR		 1794 /*
1795 * SHA1 and MD5 are known to be broken. Reduce security bits so that
1796 * they're no longer accepted at security level 1. The real values don't
1797 * really matter as long as they're lower than 80, which is our
1798 * security level 1.
1799 * https://eprint.iacr.org/2020/014 puts a chosen-prefix attack for
1800 * SHA1 at 2^63.4 and MD5+SHA1 at 2^67.2
1801 * https://documents.epfl.ch/users/l/le/lenstra/public/papers/lat.pdf
1802 * puts a chosen-prefix attack for MD5 at 2^39.
5ea4d764 1803 */
aba03ae5
KR		 1804 if (md_type == NID_sha1)
1805 secbits = 64;
1806 else if (md_type == NID_md5_sha1)
1807 secbits = 67;
1808 else if (md_type == NID_md5)
1809 secbits = 39;
620c97b6
KR		 1810 } else {
1811 /* Values from https://tools.ietf.org/html/rfc8032#section-8.5 */
1812 if (lu->sigalg == TLSEXT_SIGALG_ed25519)
1813 secbits = 128;
1814 else if (lu->sigalg == TLSEXT_SIGALG_ed448)
1815 secbits = 224;
1816 }
ee58915c
MB		 1817 /*
1818 * For provider-based sigalgs we have secbits information available
1819 * in the (provider-loaded) sigalg_list structure
1820 */
1821 if ((secbits == 0) && (lu->sig_idx >= SSL_PKEY_NUM)
1822 && ((lu->sig_idx - SSL_PKEY_NUM) < (int)ctx->sigalg_list_len)) {
1823 secbits = ctx->sigalg_list[lu->sig_idx - SSL_PKEY_NUM].secbits;
1824 }
620c97b6
KR		 1825 return secbits;
1826}
1827
0f113f3e
MC		 1828/*
1829 * Check signature algorithm is consistent with sent supported signature
b2eb6998
DSH		 1830 * algorithms and if so set relevant digest and signature scheme in
1831 * s.
ec4a50b3 1832 */
38b051a1 1833int tls12_check_peer_sigalg(SSL_CONNECTION *s, uint16_t sig, EVP_PKEY *pkey)
0f113f3e 1834{
98c792d1 1835 const uint16_t *sent_sigs;
5554facb 1836 const EVP_MD *md = NULL;
703bcee0 1837 char sigalgstr[2];
11d2641f 1838 size_t sent_sigslen, i, cidx;
c2041da8 1839 int pkeyid = -1;
f742cda8 1840 const SIGALG_LOOKUP *lu;
620c97b6 1841 int secbits = 0;
4d43ee28 1842
ed576acd 1843 pkeyid = EVP_PKEY_get_id(pkey);
ee58915c 1844
38b051a1 1845 if (SSL_CONNECTION_IS_TLS13(s)) {
5a8916d9
DSH		 1846 /* Disallow DSA for TLS 1.3 */
1847 if (pkeyid == EVP_PKEY_DSA) {
c48ffbcc 1848 SSLfatal(s, SSL_AD_ILLEGAL_PARAMETER, SSL_R_WRONG_SIGNATURE_TYPE);
5a8916d9
DSH		 1849 return 0;
1850 }
1851 /* Only allow PSS for TLS 1.3 */
1852 if (pkeyid == EVP_PKEY_RSA)
1853 pkeyid = EVP_PKEY_RSA_PSS;
1854 }
263ff2c9 1855 lu = tls1_lookup_sigalg(s, sig);
ee58915c
MB		 1856 /* if this sigalg is loaded, set so far unknown pkeyid to its sig NID */
1857 if ((pkeyid == -1) && (lu != NULL))
1858 pkeyid = lu->sig;
1859
1860 /* Should never happen */
1861 if (pkeyid == -1)
1862 return -1;
1863
f742cda8 1864 /*
d8311fc9
MC		 1865 * Check sigalgs is known. Disallow SHA1/SHA224 with TLS 1.3. Check key type
1866 * is consistent with signature: RSA keys can be used for RSA-PSS
f742cda8 1867 */
d8311fc9 1868 if (lu == NULL
38b051a1
TM		 1869 || (SSL_CONNECTION_IS_TLS13(s)
1870 && (lu->hash == NID_sha1 || lu->hash == NID_sha224))
095a982b 1871 || (pkeyid != lu->sig
f742cda8 1872 && (lu->sig != EVP_PKEY_RSA_PSS || pkeyid != EVP_PKEY_RSA))) {
c48ffbcc 1873 SSLfatal(s, SSL_AD_ILLEGAL_PARAMETER, SSL_R_WRONG_SIGNATURE_TYPE);
0f113f3e
MC		 1874 return 0;
1875 }
11d2641f 1876 /* Check the sigalg is consistent with the key OID */
ee58915c
MB		 1877 if (!ssl_cert_lookup_by_nid(
1878 (pkeyid == EVP_PKEY_RSA_PSS) ? EVP_PKEY_get_id(pkey) : pkeyid,
1879 &cidx, SSL_CONNECTION_GET_CTX(s))
11d2641f 1880 || lu->sig_idx != (int)cidx) {
c48ffbcc 1881 SSLfatal(s, SSL_AD_ILLEGAL_PARAMETER, SSL_R_WRONG_SIGNATURE_TYPE);
11d2641f
MC		 1882 return 0;
1883 }
1884
fe3066ee 1885 if (pkeyid == EVP_PKEY_EC) {
44b6318f 1886
4a1b4280
DSH		 1887 /* Check point compression is permitted */
1888 if (!tls1_check_pkey_comp(s, pkey)) {
f63a17d6 1889 SSLfatal(s, SSL_AD_ILLEGAL_PARAMETER,
f63a17d6 1890 SSL_R_ILLEGAL_POINT_COMPRESSION);
4a1b4280
DSH		 1891 return 0;
1892 }
1893
1894 /* For TLS 1.3 or Suite B check curve matches signature algorithm */
38b051a1 1895 if (SSL_CONNECTION_IS_TLS13(s) || tls1_suiteb(s)) {
d8975dec 1896 int curve = ssl_get_EC_curve_nid(pkey);
4a1b4280 1897
a34a9df0 1898 if (lu->curve != NID_undef && curve != lu->curve) {
c48ffbcc 1899 SSLfatal(s, SSL_AD_ILLEGAL_PARAMETER, SSL_R_WRONG_CURVE);
8f88cb53
DSH		 1900 return 0;
1901 }
4a1b4280 1902 }
38b051a1 1903 if (!SSL_CONNECTION_IS_TLS13(s)) {
4a1b4280 1904 /* Check curve matches extensions */
dcf8b01f 1905 if (!tls1_check_group_id(s, tls1_get_group_id(pkey), 1)) {
c48ffbcc 1906 SSLfatal(s, SSL_AD_ILLEGAL_PARAMETER, SSL_R_WRONG_CURVE);
8f88cb53
DSH		 1907 return 0;
1908 }
8f88cb53 1909 if (tls1_suiteb(s)) {
f1adb006
DSH		 1910 /* Check sigalg matches a permissible Suite B value */
1911 if (sig != TLSEXT_SIGALG_ecdsa_secp256r1_sha256
1912 && sig != TLSEXT_SIGALG_ecdsa_secp384r1_sha384) {
f63a17d6 1913 SSLfatal(s, SSL_AD_HANDSHAKE_FAILURE,
f63a17d6 1914 SSL_R_WRONG_SIGNATURE_TYPE);
0f113f3e 1915 return 0;
f1adb006 1916 }
8f88cb53 1917 }
0f113f3e 1918 }
8f88cb53 1919 } else if (tls1_suiteb(s)) {
c48ffbcc 1920 SSLfatal(s, SSL_AD_HANDSHAKE_FAILURE, SSL_R_WRONG_SIGNATURE_TYPE);
0f113f3e 1921 return 0;
8f88cb53 1922 }
0f113f3e
MC		 1923
1924 /* Check signature matches a type we sent */
a9669ddc 1925 sent_sigslen = tls12_get_psigalgs(s, 1, &sent_sigs);
536199ec 1926 for (i = 0; i < sent_sigslen; i++, sent_sigs++) {
703bcee0 1927 if (sig == *sent_sigs)
0f113f3e
MC		 1928 break;
1929 }
1930 /* Allow fallback to SHA1 if not strict mode */
f742cda8
DSH		 1931 if (i == sent_sigslen && (lu->hash != NID_sha1
1932 || s->cert->cert_flags & SSL_CERT_FLAGS_CHECK_TLS_STRICT)) {
c48ffbcc 1933 SSLfatal(s, SSL_AD_HANDSHAKE_FAILURE, SSL_R_WRONG_SIGNATURE_TYPE);
0f113f3e
MC		 1934 return 0;
1935 }
38b051a1 1936 if (!tls1_lookup_md(SSL_CONNECTION_GET_CTX(s), lu, &md)) {
c48ffbcc 1937 SSLfatal(s, SSL_AD_HANDSHAKE_FAILURE, SSL_R_UNKNOWN_DIGEST);
f63a17d6 1938 return 0;
0f113f3e 1939 }
620c97b6
KR		 1940 /*
1941 * Make sure security callback allows algorithm. For historical
1942 * reasons we have to pass the sigalg as a two byte char array.
1943 */
1944 sigalgstr[0] = (sig >> 8) & 0xff;
1945 sigalgstr[1] = sig & 0xff;
38b051a1 1946 secbits = sigalg_security_bits(SSL_CONNECTION_GET_CTX(s), lu);
620c97b6
KR		 1947 if (secbits == 0 ||
1948 !ssl_security(s, SSL_SECOP_SIGALG_CHECK, secbits,
ed576acd 1949 md != NULL ? EVP_MD_get_type(md) : NID_undef,
620c97b6 1950 (void *)sigalgstr)) {
c48ffbcc 1951 SSLfatal(s, SSL_AD_HANDSHAKE_FAILURE, SSL_R_WRONG_SIGNATURE_TYPE);
620c97b6 1952 return 0;
0f113f3e 1953 }
6cbebb55 1954 /* Store the sigalg the peer uses */
555cbb32 1955 s->s3.tmp.peer_sigalg = lu;
0f113f3e
MC		 1956 return 1;
1957}
2ea80354 1958
42ef7aea
DSH		 1959int SSL_get_peer_signature_type_nid(const SSL *s, int *pnid)
1960{
38b051a1
TM		 1961 const SSL_CONNECTION *sc = SSL_CONNECTION_FROM_CONST_SSL(s);
1962
1963 if (sc == NULL)
42ef7aea 1964 return 0;
38b051a1
TM		 1965
1966 if (sc->s3.tmp.peer_sigalg == NULL)
1967 return 0;
1968 *pnid = sc->s3.tmp.peer_sigalg->sig;
42ef7aea
DSH		 1969 return 1;
1970}
1971
a51c9f63
VD		 1972int SSL_get_signature_type_nid(const SSL *s, int *pnid)
1973{
38b051a1
TM		 1974 const SSL_CONNECTION *sc = SSL_CONNECTION_FROM_CONST_SSL(s);
1975
1976 if (sc == NULL)
1977 return 0;
1978
1979 if (sc->s3.tmp.sigalg == NULL)
a51c9f63 1980 return 0;
38b051a1 1981 *pnid = sc->s3.tmp.sigalg->sig;
a51c9f63
VD		 1982 return 1;
1983}
1984
0f113f3e 1985/*
3eb2aff4
KR		 1986 * Set a mask of disabled algorithms: an algorithm is disabled if it isn't
1987 * supported, doesn't appear in supported signature algorithms, isn't supported
1988 * by the enabled protocol versions or by the security level.
1989 *
1990 * This function should only be used for checking which ciphers are supported
1991 * by the client.
1992 *
1993 * Call ssl_cipher_disabled() to check that it's enabled or not.
b7bfe69b 1994 */
38b051a1 1995int ssl_set_client_disabled(SSL_CONNECTION *s)
0f113f3e 1996{
555cbb32
TS		 1997 s->s3.tmp.mask_a = 0;
1998 s->s3.tmp.mask_k = 0;
1999 ssl_set_sig_mask(&s->s3.tmp.mask_a, s, SSL_SECOP_SIGALG_MASK);
2000 if (ssl_get_min_max_version(s, &s->s3.tmp.min_ver,
2001 &s->s3.tmp.max_ver, NULL) != 0)
1d0c08b4 2002 return 0;
a230b26e 2003#ifndef OPENSSL_NO_PSK
0f113f3e
MC		 2004 /* with PSK there must be client callback set */
2005 if (!s->psk_client_callback) {
555cbb32
TS		 2006 s->s3.tmp.mask_a |= SSL_aPSK;
2007 s->s3.tmp.mask_k |= SSL_PSK;
0f113f3e 2008 }
a230b26e 2009#endif /* OPENSSL_NO_PSK */
e481f9b9 2010#ifndef OPENSSL_NO_SRP
0f113f3e 2011 if (!(s->srp_ctx.srp_Mask & SSL_kSRP)) {
555cbb32
TS		 2012 s->s3.tmp.mask_a |= SSL_aSRP;
2013 s->s3.tmp.mask_k |= SSL_kSRP;
0f113f3e 2014 }
e481f9b9 2015#endif
1d0c08b4 2016 return 1;
0f113f3e 2017}
fc101f88 2018
3eb2aff4
KR		 2019/*
2020 * ssl_cipher_disabled - check that a cipher is disabled or not
2021 * @s: SSL connection that you want to use the cipher on
2022 * @c: cipher to check
2023 * @op: Security check that you want to do
8af91fd9 2024 * @ecdhe: If set to 1 then TLSv1 ECDHE ciphers are also allowed in SSLv3
3eb2aff4
KR		 2025 *
2026 * Returns 1 when it's disabled, 0 when enabled.
2027 */
38b051a1
TM		 2028int ssl_cipher_disabled(const SSL_CONNECTION *s, const SSL_CIPHER *c,
2029 int op, int ecdhe)
0f113f3e 2030{
555cbb32
TS		 2031 if (c->algorithm_mkey & s->s3.tmp.mask_k
2032 || c->algorithm_auth & s->s3.tmp.mask_a)
0f113f3e 2033 return 1;
555cbb32 2034 if (s->s3.tmp.max_ver == 0)
3eb2aff4 2035 return 1;
38b051a1 2036 if (!SSL_CONNECTION_IS_DTLS(s)) {
8af91fd9
MC		 2037 int min_tls = c->min_tls;
2038
2039 /*
2040 * For historical reasons we will allow ECHDE to be selected by a server
2041 * in SSLv3 if we are a client
2042 */
2043 if (min_tls == TLS1_VERSION && ecdhe
2044 && (c->algorithm_mkey & (SSL_kECDHE | SSL_kECDHEPSK)) != 0)
2045 min_tls = SSL3_VERSION;
2046
555cbb32 2047 if ((min_tls > s->s3.tmp.max_ver) || (c->max_tls < s->s3.tmp.min_ver))
8af91fd9
MC		 2048 return 1;
2049 }
38b051a1
TM		 2050 if (SSL_CONNECTION_IS_DTLS(s)
2051 && (DTLS_VERSION_GT(c->min_dtls, s->s3.tmp.max_ver)
2052 || DTLS_VERSION_LT(c->max_dtls, s->s3.tmp.min_ver)))
3eb2aff4
KR		 2053 return 1;
2054
0f113f3e
MC		 2055 return !ssl_security(s, op, c->strength_bits, 0, (void *)c);
2056}
b362ccab 2057
38b051a1 2058int tls_use_ticket(SSL_CONNECTION *s)
0f113f3e 2059{
08191294 2060 if ((s->options & SSL_OP_NO_TICKET))
0f113f3e
MC		 2061 return 0;
2062 return ssl_security(s, SSL_SECOP_TICKET, 0, 0, NULL);
2063}
ed3883d2 2064
38b051a1 2065int tls1_set_server_sigalgs(SSL_CONNECTION *s)
0f113f3e 2066{
0f113f3e 2067 size_t i;
8483a003
F		 2068
2069 /* Clear any shared signature algorithms */
29948ac8
BK		 2070 OPENSSL_free(s->shared_sigalgs);
2071 s->shared_sigalgs = NULL;
2072 s->shared_sigalgslen = 0;
ee58915c 2073
9195ddcd 2074 /* Clear certificate validity flags */
ee58915c
MB		 2075 if (s->s3.tmp.valid_flags)
2076 memset(s->s3.tmp.valid_flags, 0, s->ssl_pkey_num * sizeof(uint32_t));
2077 else
2078 s->s3.tmp.valid_flags = OPENSSL_zalloc(s->ssl_pkey_num * sizeof(uint32_t));
2079 if (s->s3.tmp.valid_flags == NULL)
2080 return 0;
a8bb912d
DSH		 2081 /*
2082 * If peer sent no signature algorithms check to see if we support
2083 * the default algorithm for each certificate type
2084 */
555cbb32
TS		 2085 if (s->s3.tmp.peer_cert_sigalgs == NULL
2086 && s->s3.tmp.peer_sigalgs == NULL) {
a8bb912d
DSH		 2087 const uint16_t *sent_sigs;
2088 size_t sent_sigslen = tls12_get_psigalgs(s, 1, &sent_sigs);
0f113f3e 2089
ee58915c 2090 for (i = 0; i < s->ssl_pkey_num; i++) {
a8bb912d
DSH		 2091 const SIGALG_LOOKUP *lu = tls1_get_legacy_sigalg(s, i);
2092 size_t j;
2093
2094 if (lu == NULL)
2095 continue;
2096 /* Check default matches a type we sent */
2097 for (j = 0; j < sent_sigslen; j++) {
2098 if (lu->sigalg == sent_sigs[j]) {
555cbb32 2099 s->s3.tmp.valid_flags[i] = CERT_PKEY_SIGN;
a8bb912d
DSH		 2100 break;
2101 }
2102 }
2103 }
9195ddcd 2104 return 1;
a8bb912d 2105 }
9195ddcd
DSH		 2106
2107 if (!tls1_process_sigalgs(s)) {
c48ffbcc 2108 SSLfatal(s, SSL_AD_INTERNAL_ERROR, ERR_R_INTERNAL_ERROR);
f63a17d6 2109 return 0;
d376e57d 2110 }
29948ac8 2111 if (s->shared_sigalgs != NULL)
9195ddcd 2112 return 1;
f63a17d6 2113
fb34a0f4 2114 /* Fatal error if no shared signature algorithms */
c48ffbcc 2115 SSLfatal(s, SSL_AD_HANDSHAKE_FAILURE,
f63a17d6 2116 SSL_R_NO_SHARED_SIGNATURE_ALGORITHMS);
0f113f3e
MC		 2117 return 0;
2118}
e469af8d 2119
1d97c843 2120/*-
1ab3836b 2121 * Gets the ticket information supplied by the client if any.
e7f0d921 2122 *
1ab3836b 2123 * hello: The parsed ClientHello data
c519e89f
BM		 2124 * ret: (output) on return, if a ticket was decrypted, then this is set to
2125 * point to the resulting session.
6434abbf 2126 */
38b051a1
TM		 2127SSL_TICKET_STATUS tls_get_ticket_from_client(SSL_CONNECTION *s,
2128 CLIENTHELLO_MSG *hello,
df0fed9a 2129 SSL_SESSION **ret)
0f113f3e 2130{
1ab3836b
MC		 2131 size_t size;
2132 RAW_EXTENSION *ticketext;
e7f0d921 2133
0f113f3e 2134 *ret = NULL;
aff8c126 2135 s->ext.ticket_expected = 0;
0f113f3e
MC		 2136
2137 /*
9362c93e
MC		 2138 * If tickets disabled or not supported by the protocol version
2139 * (e.g. TLSv1.3) behave as if no ticket present to permit stateful
0f113f3e
MC		 2140 * resumption.
2141 */
1ab3836b 2142 if (s->version <= SSL3_VERSION || !tls_use_ticket(s))
df0fed9a 2143 return SSL_TICKET_NONE;
9ceb2426 2144
70af3d8e
MC		 2145 ticketext = &hello->pre_proc_exts[TLSEXT_IDX_session_ticket];
2146 if (!ticketext->present)
df0fed9a 2147 return SSL_TICKET_NONE;
1ab3836b
MC		 2148
2149 size = PACKET_remaining(&ticketext->data);
70af3d8e 2150
c0638ade 2151 return tls_decrypt_ticket(s, PACKET_data(&ticketext->data), size,
70af3d8e 2152 hello->session_id, hello->session_id_len, ret);
1ab3836b
MC		 2153}
2154
1d97c843
TH		 2155/*-
2156 * tls_decrypt_ticket attempts to decrypt a session ticket.
c519e89f 2157 *
61fb5923
MC		 2158 * If s->tls_session_secret_cb is set and we're not doing TLSv1.3 then we are
2159 * expecting a pre-shared key ciphersuite, in which case we have no use for
2160 * session tickets and one will never be decrypted, nor will
2161 * s->ext.ticket_expected be set to 1.
2162 *
2163 * Side effects:
2164 * Sets s->ext.ticket_expected to 1 if the server will have to issue
2165 * a new session ticket to the client because the client indicated support
2166 * (and s->tls_session_secret_cb is NULL) but the client either doesn't have
2167 * a session ticket or we couldn't use the one it gave us, or if
2168 * s->ctx->ext.ticket_key_cb asked to renew the client's ticket.
2169 * Otherwise, s->ext.ticket_expected is set to 0.
2170 *
c519e89f 2171 * etick: points to the body of the session ticket extension.
8483a003 2172 * eticklen: the length of the session tickets extension.
c519e89f
BM		 2173 * sess_id: points at the session ID.
2174 * sesslen: the length of the session ID.
2175 * psess: (output) on return, if a ticket was decrypted, then this is set to
2176 * point to the resulting session.
c519e89f 2177 */
38b051a1
TM		 2178SSL_TICKET_STATUS tls_decrypt_ticket(SSL_CONNECTION *s,
2179 const unsigned char *etick,
2180 size_t eticklen,
2181 const unsigned char *sess_id,
df0fed9a 2182 size_t sesslen, SSL_SESSION **psess)
0f113f3e 2183{
61fb5923 2184 SSL_SESSION *sess = NULL;
0f113f3e
MC		 2185 unsigned char *sdec;
2186 const unsigned char *p;
83ab43da 2187 int slen, ivlen, renew_ticket = 0, declen;
61fb5923 2188 SSL_TICKET_STATUS ret = SSL_TICKET_FATAL_ERR_OTHER;
348240c6 2189 size_t mlen;
0f113f3e 2190 unsigned char tick_hmac[EVP_MAX_MD_SIZE];
a76ce286 2191 SSL_HMAC *hctx = NULL;
ee763495 2192 EVP_CIPHER_CTX *ctx = NULL;
222da979 2193 SSL_CTX *tctx = s->session_ctx;
e97763c9 2194
61fb5923
MC		 2195 if (eticklen == 0) {
2196 /*
2197 * The client will accept a ticket but doesn't currently have
2198 * one (TLSv1.2 and below), or treated as a fatal error in TLSv1.3
2199 */
2200 ret = SSL_TICKET_EMPTY;
2201 goto end;
2202 }
38b051a1 2203 if (!SSL_CONNECTION_IS_TLS13(s) && s->ext.session_secret_cb) {
61fb5923
MC		 2204 /*
2205 * Indicate that the ticket couldn't be decrypted rather than
2206 * generating the session from ticket now, trigger
2207 * abbreviated handshake based on external mechanism to
2208 * calculate the master secret later.
2209 */
2210 ret = SSL_TICKET_NO_DECRYPT;
2211 goto end;
2212 }
2213
ee763495
MC		 2214 /* Need at least keyname + iv */
2215 if (eticklen < TLSEXT_KEYNAME_LENGTH + EVP_MAX_IV_LENGTH) {
df0fed9a 2216 ret = SSL_TICKET_NO_DECRYPT;
c0638ade 2217 goto end;
ee763495
MC		 2218 }
2219
0f113f3e 2220 /* Initialize session ticket encryption and HMAC contexts */
a76ce286 2221 hctx = ssl_hmac_new(tctx);
c0638ade
MC		 2222 if (hctx == NULL) {
2223 ret = SSL_TICKET_FATAL_ERR_MALLOC;
2224 goto end;
2225 }
846ec07d 2226 ctx = EVP_CIPHER_CTX_new();
35b1a433 2227 if (ctx == NULL) {
df0fed9a 2228 ret = SSL_TICKET_FATAL_ERR_MALLOC;
c0638ade 2229 goto end;
35b1a433 2230 }
a76ce286
P		 2231#ifndef OPENSSL_NO_DEPRECATED_3_0
2232 if (tctx->ext.ticket_key_evp_cb != NULL || tctx->ext.ticket_key_cb != NULL)
2233#else
2234 if (tctx->ext.ticket_key_evp_cb != NULL)
2235#endif
2236 {
0f113f3e 2237 unsigned char *nctick = (unsigned char *)etick;
a76ce286
P		 2238 int rv = 0;
2239
2240 if (tctx->ext.ticket_key_evp_cb != NULL)
38b051a1 2241 rv = tctx->ext.ticket_key_evp_cb(SSL_CONNECTION_GET_SSL(s), nctick,
a76ce286
P		 2242 nctick + TLSEXT_KEYNAME_LENGTH,
2243 ctx,
2244 ssl_hmac_get0_EVP_MAC_CTX(hctx),
2245 0);
2246#ifndef OPENSSL_NO_DEPRECATED_3_0
2247 else if (tctx->ext.ticket_key_cb != NULL)
2248 /* if 0 is returned, write an empty ticket */
38b051a1 2249 rv = tctx->ext.ticket_key_cb(SSL_CONNECTION_GET_SSL(s), nctick,
ee763495 2250 nctick + TLSEXT_KEYNAME_LENGTH,
a76ce286
P		 2251 ctx, ssl_hmac_get0_HMAC_CTX(hctx), 0);
2252#endif
c0638ade
MC		 2253 if (rv < 0) {
2254 ret = SSL_TICKET_FATAL_ERR_OTHER;
2255 goto end;
2256 }
35b1a433 2257 if (rv == 0) {
df0fed9a 2258 ret = SSL_TICKET_NO_DECRYPT;
c0638ade 2259 goto end;
35b1a433 2260 }
0f113f3e
MC		 2261 if (rv == 2)
2262 renew_ticket = 1;
2263 } else {
148bfd26 2264 EVP_CIPHER *aes256cbc = NULL;
38b051a1 2265 SSL_CTX *sctx = SSL_CONNECTION_GET_CTX(s);
148bfd26 2266
0f113f3e 2267 /* Check key name matches */
aff8c126 2268 if (memcmp(etick, tctx->ext.tick_key_name,
ee763495 2269 TLSEXT_KEYNAME_LENGTH) != 0) {
df0fed9a 2270 ret = SSL_TICKET_NO_DECRYPT;
c0638ade 2271 goto end;
35b1a433 2272 }
148bfd26 2273
38b051a1
TM		 2274 aes256cbc = EVP_CIPHER_fetch(sctx->libctx, "AES-256-CBC",
2275 sctx->propq);
148bfd26
MC		 2276 if (aes256cbc == NULL
2277 || ssl_hmac_init(hctx, tctx->ext.secure->tick_hmac_key,
2278 sizeof(tctx->ext.secure->tick_hmac_key),
2279 "SHA256") <= 0
2280 || EVP_DecryptInit_ex(ctx, aes256cbc, NULL,
4bfb96f2 2281 tctx->ext.secure->tick_aes_key,
ee763495 2282 etick + TLSEXT_KEYNAME_LENGTH) <= 0) {
148bfd26 2283 EVP_CIPHER_free(aes256cbc);
c0638ade
MC		 2284 ret = SSL_TICKET_FATAL_ERR_OTHER;
2285 goto end;
a230b26e 2286 }
148bfd26 2287 EVP_CIPHER_free(aes256cbc);
38b051a1 2288 if (SSL_CONNECTION_IS_TLS13(s))
c0638ade 2289 renew_ticket = 1;
0f113f3e
MC		 2290 }
2291 /*
2292 * Attempt to process session ticket, first conduct sanity and integrity
2293 * checks on ticket.
2294 */
a76ce286 2295 mlen = ssl_hmac_size(hctx);
348240c6 2296 if (mlen == 0) {
c0638ade
MC		 2297 ret = SSL_TICKET_FATAL_ERR_OTHER;
2298 goto end;
0f113f3e 2299 }
c0638ade 2300
83ab43da
DB		 2301 ivlen = EVP_CIPHER_CTX_get_iv_length(ctx);
2302 if (ivlen < 0) {
2303 ret = SSL_TICKET_FATAL_ERR_OTHER;
2304 goto end;
2305 }
2306
e97763c9 2307 /* Sanity check ticket length: must exceed keyname + IV + HMAC */
83ab43da 2308 if (eticklen <= TLSEXT_KEYNAME_LENGTH + ivlen + mlen) {
df0fed9a 2309 ret = SSL_TICKET_NO_DECRYPT;
c0638ade 2310 goto end;
e97763c9 2311 }
0f113f3e
MC		 2312 eticklen -= mlen;
2313 /* Check HMAC of encrypted ticket */
a76ce286
P		 2314 if (ssl_hmac_update(hctx, etick, eticklen) <= 0
2315 || ssl_hmac_final(hctx, tick_hmac, NULL, sizeof(tick_hmac)) <= 0) {
c0638ade
MC		 2316 ret = SSL_TICKET_FATAL_ERR_OTHER;
2317 goto end;
5f3d93e4 2318 }
c0638ade 2319
0f113f3e 2320 if (CRYPTO_memcmp(tick_hmac, etick + eticklen, mlen)) {
c0638ade
MC		 2321 ret = SSL_TICKET_NO_DECRYPT;
2322 goto end;
0f113f3e
MC		 2323 }
2324 /* Attempt to decrypt session data */
2325 /* Move p after IV to start of encrypted ticket, update length */
83ab43da
DB		 2326 p = etick + TLSEXT_KEYNAME_LENGTH + ivlen;
2327 eticklen -= TLSEXT_KEYNAME_LENGTH + ivlen;
0f113f3e 2328 sdec = OPENSSL_malloc(eticklen);
348240c6
MC		 2329 if (sdec == NULL || EVP_DecryptUpdate(ctx, sdec, &slen, p,
2330 (int)eticklen) <= 0) {
d1247df2 2331 OPENSSL_free(sdec);
c0638ade
MC		 2332 ret = SSL_TICKET_FATAL_ERR_OTHER;
2333 goto end;
0f113f3e 2334 }
348240c6 2335 if (EVP_DecryptFinal(ctx, sdec + slen, &declen) <= 0) {
0f113f3e 2336 OPENSSL_free(sdec);
c0638ade
MC		 2337 ret = SSL_TICKET_NO_DECRYPT;
2338 goto end;
0f113f3e 2339 }
348240c6 2340 slen += declen;
0f113f3e
MC		 2341 p = sdec;
2342
2343 sess = d2i_SSL_SESSION(NULL, &p, slen);
d3bc9805 2344 slen -= p - sdec;
0f113f3e
MC		 2345 OPENSSL_free(sdec);
2346 if (sess) {
79020b27 2347 /* Some additional consistency checks */
32305f88 2348 if (slen != 0) {
79020b27 2349 SSL_SESSION_free(sess);
5f96a95e 2350 sess = NULL;
c0638ade
MC		 2351 ret = SSL_TICKET_NO_DECRYPT;
2352 goto end;
79020b27 2353 }
0f113f3e
MC		 2354 /*
2355 * The session ID, if non-empty, is used by some clients to detect
2356 * that the ticket has been accepted. So we copy it to the session
2357 * structure. If it is empty set length to zero as required by
2358 * standard.
2359 */
32305f88 2360 if (sesslen) {
0f113f3e 2361 memcpy(sess->session_id, sess_id, sesslen);
32305f88
MC		 2362 sess->session_id_length = sesslen;
2363 }
0f113f3e 2364 if (renew_ticket)
c0638ade 2365 ret = SSL_TICKET_SUCCESS_RENEW;
0f113f3e 2366 else
c0638ade
MC		 2367 ret = SSL_TICKET_SUCCESS;
2368 goto end;
0f113f3e
MC		 2369 }
2370 ERR_clear_error();
2371 /*
2372 * For session parse failure, indicate that we need to send a new ticket.
2373 */
c0638ade
MC		 2374 ret = SSL_TICKET_NO_DECRYPT;
2375
2376 end:
846ec07d 2377 EVP_CIPHER_CTX_free(ctx);
a76ce286 2378 ssl_hmac_free(hctx);
c0638ade
MC		 2379
2380 /*
61fb5923
MC		 2381 * If set, the decrypt_ticket_cb() is called unless a fatal error was
2382 * detected above. The callback is responsible for checking |ret| before it
2383 * performs any action
c0638ade 2384 */
61fb5923
MC		 2385 if (s->session_ctx->decrypt_ticket_cb != NULL
2386 && (ret == SSL_TICKET_EMPTY
2387 || ret == SSL_TICKET_NO_DECRYPT
2388 || ret == SSL_TICKET_SUCCESS
2389 || ret == SSL_TICKET_SUCCESS_RENEW)) {
c0638ade 2390 size_t keyname_len = eticklen;
61fb5923 2391 int retcb;
c0638ade
MC		 2392
2393 if (keyname_len > TLSEXT_KEYNAME_LENGTH)
2394 keyname_len = TLSEXT_KEYNAME_LENGTH;
38b051a1
TM		 2395 retcb = s->session_ctx->decrypt_ticket_cb(SSL_CONNECTION_GET_SSL(s),
2396 sess, etick, keyname_len,
61fb5923
MC		 2397 ret,
2398 s->session_ctx->ticket_cb_data);
2399 switch (retcb) {
2400 case SSL_TICKET_RETURN_ABORT:
2401 ret = SSL_TICKET_FATAL_ERR_OTHER;
2402 break;
2403
2404 case SSL_TICKET_RETURN_IGNORE:
2405 ret = SSL_TICKET_NONE;
2406 SSL_SESSION_free(sess);
2407 sess = NULL;
2408 break;
2409
2410 case SSL_TICKET_RETURN_IGNORE_RENEW:
2411 if (ret != SSL_TICKET_EMPTY && ret != SSL_TICKET_NO_DECRYPT)
2412 ret = SSL_TICKET_NO_DECRYPT;
2413 /* else the value of |ret| will already do the right thing */
2414 SSL_SESSION_free(sess);
2415 sess = NULL;
2416 break;
2417
2418 case SSL_TICKET_RETURN_USE:
2419 case SSL_TICKET_RETURN_USE_RENEW:
2420 if (ret != SSL_TICKET_SUCCESS
2421 && ret != SSL_TICKET_SUCCESS_RENEW)
2422 ret = SSL_TICKET_FATAL_ERR_OTHER;
2423 else if (retcb == SSL_TICKET_RETURN_USE)
2424 ret = SSL_TICKET_SUCCESS;
2425 else
2426 ret = SSL_TICKET_SUCCESS_RENEW;
2427 break;
2428
2429 default:
2430 ret = SSL_TICKET_FATAL_ERR_OTHER;
2431 }
c0638ade
MC		 2432 }
2433
38b051a1 2434 if (s->ext.session_secret_cb == NULL || SSL_CONNECTION_IS_TLS13(s)) {
309371d6
MC		 2435 switch (ret) {
2436 case SSL_TICKET_NO_DECRYPT:
2437 case SSL_TICKET_SUCCESS_RENEW:
2438 case SSL_TICKET_EMPTY:
2439 s->ext.ticket_expected = 1;
2440 }
c0638ade
MC		 2441 }
2442
61fb5923
MC		 2443 *psess = sess;
2444
2445 return ret;
0f113f3e 2446}
6434abbf 2447
b362ccab 2448/* Check to see if a signature algorithm is allowed */
38b051a1
TM		 2449static int tls12_sigalg_allowed(const SSL_CONNECTION *s, int op,
2450 const SIGALG_LOOKUP *lu)
0f113f3e 2451{
703bcee0 2452 unsigned char sigalgstr[2];
44b6318f 2453 int secbits;
703bcee0 2454
263ff2c9 2455 if (lu == NULL || !lu->enabled)
0f113f3e 2456 return 0;
224b4e37 2457 /* DSA is not allowed in TLS 1.3 */
38b051a1 2458 if (SSL_CONNECTION_IS_TLS13(s) && lu->sig == EVP_PKEY_DSA)
224b4e37 2459 return 0;
08cea586
MC		 2460 /*
2461 * At some point we should fully axe DSA/etc. in ClientHello as per TLS 1.3
2462 * spec
2463 */
38b051a1
TM		 2464 if (!s->server && !SSL_CONNECTION_IS_DTLS(s)
2465 && s->s3.tmp.min_ver >= TLS1_3_VERSION
6ffeb269
BK		 2466 && (lu->sig == EVP_PKEY_DSA || lu->hash_idx == SSL_MD_SHA1_IDX
2467 || lu->hash_idx == SSL_MD_MD5_IDX
2468 || lu->hash_idx == SSL_MD_SHA224_IDX))
2469 return 0;
871980a9 2470
0f113f3e 2471 /* See if public key algorithm allowed */
38b051a1 2472 if (ssl_cert_is_disabled(SSL_CONNECTION_GET_CTX(s), lu->sig_idx))
0f113f3e 2473 return 0;
871980a9
MC		 2474
2475 if (lu->sig == NID_id_GostR3410_2012_256
2476 || lu->sig == NID_id_GostR3410_2012_512
2477 || lu->sig == NID_id_GostR3410_2001) {
2478 /* We never allow GOST sig algs on the server with TLSv1.3 */
38b051a1 2479 if (s->server && SSL_CONNECTION_IS_TLS13(s))
871980a9
MC		 2480 return 0;
2481 if (!s->server
38b051a1 2482 && SSL_CONNECTION_GET_SSL(s)->method->version == TLS_ANY_VERSION
555cbb32 2483 && s->s3.tmp.max_ver >= TLS1_3_VERSION) {
871980a9
MC		 2484 int i, num;
2485 STACK_OF(SSL_CIPHER) *sk;
2486
2487 /*
2488 * We're a client that could negotiate TLSv1.3. We only allow GOST
2489 * sig algs if we could negotiate TLSv1.2 or below and we have GOST
2490 * ciphersuites enabled.
2491 */
2492
555cbb32 2493 if (s->s3.tmp.min_ver >= TLS1_3_VERSION)
871980a9
MC		 2494 return 0;
2495
38b051a1 2496 sk = SSL_get_ciphers(SSL_CONNECTION_GET_SSL(s));
871980a9
MC		 2497 num = sk != NULL ? sk_SSL_CIPHER_num(sk) : 0;
2498 for (i = 0; i < num; i++) {
2499 const SSL_CIPHER *c;
2500
2501 c = sk_SSL_CIPHER_value(sk, i);
2502 /* Skip disabled ciphers */
2503 if (ssl_cipher_disabled(s, c, SSL_SECOP_CIPHER_SUPPORTED, 0))
2504 continue;
2505
5a5530a2 2506 if ((c->algorithm_mkey & (SSL_kGOST | SSL_kGOST18)) != 0)
871980a9
MC		 2507 break;
2508 }
2509 if (i == num)
2510 return 0;
2511 }
2512 }
2513
0f113f3e 2514 /* Finally see if security callback allows it */
38b051a1 2515 secbits = sigalg_security_bits(SSL_CONNECTION_GET_CTX(s), lu);
b0e9ab95
DSH		 2516 sigalgstr[0] = (lu->sigalg >> 8) & 0xff;
2517 sigalgstr[1] = lu->sigalg & 0xff;
44b6318f 2518 return ssl_security(s, op, secbits, lu->hash, (void *)sigalgstr);
0f113f3e
MC		 2519}
2520
2521/*
2522 * Get a mask of disabled public key algorithms based on supported signature
2523 * algorithms. For example if no signature algorithm supports RSA then RSA is
2524 * disabled.
b362ccab
DSH		 2525 */
2526
38b051a1 2527void ssl_set_sig_mask(uint32_t *pmask_a, SSL_CONNECTION *s, int op)
0f113f3e 2528{
98c792d1 2529 const uint16_t *sigalgs;
0f113f3e 2530 size_t i, sigalgslen;
13cc2574 2531 uint32_t disabled_mask = SSL_aRSA | SSL_aDSS | SSL_aECDSA;
0f113f3e 2532 /*
13cc2574
DSH		 2533 * Go through all signature algorithms seeing if we support any
2534 * in disabled_mask.
0f113f3e 2535 */
a9669ddc 2536 sigalgslen = tls12_get_psigalgs(s, 1, &sigalgs);
b2555168 2537 for (i = 0; i < sigalgslen; i++, sigalgs++) {
263ff2c9 2538 const SIGALG_LOOKUP *lu = tls1_lookup_sigalg(s, *sigalgs);
13cc2574 2539 const SSL_CERT_LOOKUP *clu;
b0e9ab95
DSH		 2540
2541 if (lu == NULL)
2542 continue;
13cc2574 2543
ee58915c
MB		 2544 clu = ssl_cert_lookup_by_idx(lu->sig_idx,
2545 SSL_CONNECTION_GET_CTX(s));
dd6b2706
P		 2546 if (clu == NULL)
2547 continue;
13cc2574
DSH		 2548
2549 /* If algorithm is disabled see if we can enable it */
2550 if ((clu->amask & disabled_mask) != 0
2551 && tls12_sigalg_allowed(s, op, lu))
2552 disabled_mask &= ~clu->amask;
0f113f3e 2553 }
13cc2574 2554 *pmask_a |= disabled_mask;
0f113f3e 2555}
b362ccab 2556
38b051a1 2557int tls12_copy_sigalgs(SSL_CONNECTION *s, WPACKET *pkt,
98c792d1 2558 const uint16_t *psig, size_t psiglen)
2c7b4dbc
MC		 2559{
2560 size_t i;
b0e9ab95 2561 int rv = 0;
c0f9e23c 2562
703bcee0 2563 for (i = 0; i < psiglen; i++, psig++) {
263ff2c9 2564 const SIGALG_LOOKUP *lu = tls1_lookup_sigalg(s, *psig);
b0e9ab95 2565
54e3efff
MC		 2566 if (lu == NULL
2567 || !tls12_sigalg_allowed(s, SSL_SECOP_SIGALG_SUPPORTED, lu))
b0e9ab95
DSH		 2568 continue;
2569 if (!WPACKET_put_bytes_u16(pkt, *psig))
2570 return 0;
2571 /*
2572 * If TLS 1.3 must have at least one valid TLS 1.3 message
d8311fc9 2573 * signing algorithm: i.e. neither RSA nor SHA1/SHA224
b0e9ab95 2574 */
38b051a1 2575 if (rv == 0 && (!SSL_CONNECTION_IS_TLS13(s)
d8311fc9
MC		 2576 || (lu->sig != EVP_PKEY_RSA
2577 && lu->hash != NID_sha1
2578 && lu->hash != NID_sha224)))
b0e9ab95 2579 rv = 1;
2c7b4dbc 2580 }
5528d68f 2581 if (rv == 0)
6849b73c 2582 ERR_raise(ERR_LIB_SSL, SSL_R_NO_SUITABLE_SIGNATURE_ALGORITHM);
b0e9ab95 2583 return rv;
2c7b4dbc
MC		 2584}
2585
4453cd8c 2586/* Given preference and allowed sigalgs set shared sigalgs */
38b051a1
TM		 2587static size_t tls12_shared_sigalgs(SSL_CONNECTION *s,
2588 const SIGALG_LOOKUP **shsig,
98c792d1
DSH		 2589 const uint16_t *pref, size_t preflen,
2590 const uint16_t *allow, size_t allowlen)
0f113f3e 2591{
98c792d1 2592 const uint16_t *ptmp, *atmp;
0f113f3e 2593 size_t i, j, nmatch = 0;
703bcee0 2594 for (i = 0, ptmp = pref; i < preflen; i++, ptmp++) {
263ff2c9 2595 const SIGALG_LOOKUP *lu = tls1_lookup_sigalg(s, *ptmp);
b0e9ab95 2596
0f113f3e 2597 /* Skip disabled hashes or signature algorithms */
54e3efff
MC		 2598 if (lu == NULL
2599 || !tls12_sigalg_allowed(s, SSL_SECOP_SIGALG_SHARED, lu))
0f113f3e 2600 continue;
703bcee0
MC		 2601 for (j = 0, atmp = allow; j < allowlen; j++, atmp++) {
2602 if (*ptmp == *atmp) {
0f113f3e 2603 nmatch++;
b0e9ab95
DSH		 2604 if (shsig)
2605 *shsig++ = lu;
0f113f3e
MC		 2606 break;
2607 }
2608 }
2609 }
2610 return nmatch;
2611}
4453cd8c
DSH		 2612
2613/* Set shared signature algorithms for SSL structures */
38b051a1 2614static int tls1_set_shared_sigalgs(SSL_CONNECTION *s)
0f113f3e 2615{
98c792d1 2616 const uint16_t *pref, *allow, *conf;
0f113f3e
MC		 2617 size_t preflen, allowlen, conflen;
2618 size_t nmatch;
4d43ee28 2619 const SIGALG_LOOKUP **salgs = NULL;
0f113f3e
MC		 2620 CERT *c = s->cert;
2621 unsigned int is_suiteb = tls1_suiteb(s);
b548a1f1 2622
29948ac8
BK		 2623 OPENSSL_free(s->shared_sigalgs);
2624 s->shared_sigalgs = NULL;
2625 s->shared_sigalgslen = 0;
0f113f3e
MC		 2626 /* If client use client signature algorithms if not NULL */
2627 if (!s->server && c->client_sigalgs && !is_suiteb) {
2628 conf = c->client_sigalgs;
2629 conflen = c->client_sigalgslen;
2630 } else if (c->conf_sigalgs && !is_suiteb) {
2631 conf = c->conf_sigalgs;
2632 conflen = c->conf_sigalgslen;
2633 } else
a9669ddc 2634 conflen = tls12_get_psigalgs(s, 0, &conf);
0f113f3e
MC		 2635 if (s->options & SSL_OP_CIPHER_SERVER_PREFERENCE || is_suiteb) {
2636 pref = conf;
2637 preflen = conflen;
555cbb32
TS		 2638 allow = s->s3.tmp.peer_sigalgs;
2639 allowlen = s->s3.tmp.peer_sigalgslen;
0f113f3e
MC		 2640 } else {
2641 allow = conf;
2642 allowlen = conflen;
555cbb32
TS		 2643 pref = s->s3.tmp.peer_sigalgs;
2644 preflen = s->s3.tmp.peer_sigalgslen;
0f113f3e
MC		 2645 }
2646 nmatch = tls12_shared_sigalgs(s, NULL, pref, preflen, allow, allowlen);
34e3edbf 2647 if (nmatch) {
e077455e 2648 if ((salgs = OPENSSL_malloc(nmatch * sizeof(*salgs))) == NULL)
34e3edbf
DSH		 2649 return 0;
2650 nmatch = tls12_shared_sigalgs(s, salgs, pref, preflen, allow, allowlen);
2651 } else {
2652 salgs = NULL;
2653 }
29948ac8
BK		 2654 s->shared_sigalgs = salgs;
2655 s->shared_sigalgslen = nmatch;
0f113f3e
MC		 2656 return 1;
2657}
4453cd8c 2658
9e84a42d 2659int tls1_save_u16(PACKET *pkt, uint16_t **pdest, size_t *pdestlen)
0f113f3e 2660{
98c792d1 2661 unsigned int stmp;
703bcee0 2662 size_t size, i;
9e84a42d 2663 uint16_t *buf;
0f113f3e 2664
703bcee0
MC		 2665 size = PACKET_remaining(pkt);
2666
2667 /* Invalid data length */
8f12296e 2668 if (size == 0 || (size & 1) != 0)
703bcee0
MC		 2669 return 0;
2670
2671 size >>= 1;
2672
e077455e 2673 if ((buf = OPENSSL_malloc(size * sizeof(*buf))) == NULL)
0f113f3e 2674 return 0;
98c792d1 2675 for (i = 0; i < size && PACKET_get_net_2(pkt, &stmp); i++)
9e84a42d 2676 buf[i] = stmp;
703bcee0 2677
9e84a42d
DSH		 2678 if (i != size) {
2679 OPENSSL_free(buf);
703bcee0 2680 return 0;
9e84a42d
DSH		 2681 }
2682
2683 OPENSSL_free(*pdest);
2684 *pdest = buf;
2685 *pdestlen = size;
703bcee0 2686
0f113f3e
MC		 2687 return 1;
2688}
6b7be581 2689
38b051a1 2690int tls1_save_sigalgs(SSL_CONNECTION *s, PACKET *pkt, int cert)
9e84a42d
DSH		 2691{
2692 /* Extension ignored for inappropriate versions */
2693 if (!SSL_USE_SIGALGS(s))
2694 return 1;
2695 /* Should never happen */
2696 if (s->cert == NULL)
2697 return 0;
2698
c589c34e 2699 if (cert)
555cbb32
TS		 2700 return tls1_save_u16(pkt, &s->s3.tmp.peer_cert_sigalgs,
2701 &s->s3.tmp.peer_cert_sigalgslen);
c589c34e 2702 else
555cbb32
TS		 2703 return tls1_save_u16(pkt, &s->s3.tmp.peer_sigalgs,
2704 &s->s3.tmp.peer_sigalgslen);
9e84a42d 2705
9e84a42d
DSH		 2706}
2707
2708/* Set preferred digest for each key type */
2709
38b051a1 2710int tls1_process_sigalgs(SSL_CONNECTION *s)
0f113f3e 2711{
0f113f3e 2712 size_t i;
555cbb32 2713 uint32_t *pvalid = s->s3.tmp.valid_flags;
4d43ee28 2714
0f113f3e
MC		 2715 if (!tls1_set_shared_sigalgs(s))
2716 return 0;
2717
ee58915c 2718 for (i = 0; i < s->ssl_pkey_num; i++)
9195ddcd
DSH		 2719 pvalid[i] = 0;
2720
29948ac8
BK		 2721 for (i = 0; i < s->shared_sigalgslen; i++) {
2722 const SIGALG_LOOKUP *sigptr = s->shared_sigalgs[i];
9195ddcd 2723 int idx = sigptr->sig_idx;
4d43ee28 2724
523fb323 2725 /* Ignore PKCS1 based sig algs in TLSv1.3 */
38b051a1 2726 if (SSL_CONNECTION_IS_TLS13(s) && sigptr->sig == EVP_PKEY_RSA)
523fb323 2727 continue;
9195ddcd 2728 /* If not disabled indicate we can explicitly sign */
38b051a1
TM		 2729 if (pvalid[idx] == 0
2730 && !ssl_cert_is_disabled(SSL_CONNECTION_GET_CTX(s), idx))
b8858aec 2731 pvalid[idx] = CERT_PKEY_EXPLICIT_SIGN | CERT_PKEY_SIGN;
0f113f3e
MC		 2732 }
2733 return 1;
2734}
4817504d 2735
e7f8ff43 2736int SSL_get_sigalgs(SSL *s, int idx,
0f113f3e
MC		 2737 int *psign, int *phash, int *psignhash,
2738 unsigned char *rsig, unsigned char *rhash)
2739{
38b051a1
TM		 2740 uint16_t *psig;
2741 size_t numsigalgs;
2742 SSL_CONNECTION *sc = SSL_CONNECTION_FROM_SSL(s);
2743
2744 if (sc == NULL)
2745 return 0;
2746
2747 psig = sc->s3.tmp.peer_sigalgs;
2748 numsigalgs = sc->s3.tmp.peer_sigalgslen;
2749
348240c6 2750 if (psig == NULL || numsigalgs > INT_MAX)
0f113f3e
MC		 2751 return 0;
2752 if (idx >= 0) {
4d43ee28
DSH		 2753 const SIGALG_LOOKUP *lu;
2754
703bcee0 2755 if (idx >= (int)numsigalgs)
0f113f3e
MC		 2756 return 0;
2757 psig += idx;
4d43ee28 2758 if (rhash != NULL)
536199ec 2759 *rhash = (unsigned char)((*psig >> 8) & 0xff);
4d43ee28 2760 if (rsig != NULL)
536199ec 2761 *rsig = (unsigned char)(*psig & 0xff);
38b051a1 2762 lu = tls1_lookup_sigalg(sc, *psig);
4d43ee28
DSH		 2763 if (psign != NULL)
2764 *psign = lu != NULL ? lu->sig : NID_undef;
2765 if (phash != NULL)
2766 *phash = lu != NULL ? lu->hash : NID_undef;
2767 if (psignhash != NULL)
2768 *psignhash = lu != NULL ? lu->sigandhash : NID_undef;
0f113f3e 2769 }
348240c6 2770 return (int)numsigalgs;
0f113f3e 2771}
4453cd8c
DSH		 2772
2773int SSL_get_shared_sigalgs(SSL *s, int idx,
0f113f3e
MC		 2774 int *psign, int *phash, int *psignhash,
2775 unsigned char *rsig, unsigned char *rhash)
2776{
4d43ee28 2777 const SIGALG_LOOKUP *shsigalgs;
38b051a1
TM		 2778 SSL_CONNECTION *sc = SSL_CONNECTION_FROM_SSL(s);
2779
2780 if (sc == NULL)
2781 return 0;
2782
2783 if (sc->shared_sigalgs == NULL
6d047e06 2784 || idx < 0
38b051a1
TM		 2785 || idx >= (int)sc->shared_sigalgslen
2786 || sc->shared_sigalgslen > INT_MAX)
0f113f3e 2787 return 0;
38b051a1 2788 shsigalgs = sc->shared_sigalgs[idx];
4d43ee28
DSH		 2789 if (phash != NULL)
2790 *phash = shsigalgs->hash;
2791 if (psign != NULL)
2792 *psign = shsigalgs->sig;
2793 if (psignhash != NULL)
2794 *psignhash = shsigalgs->sigandhash;
2795 if (rsig != NULL)
2796 *rsig = (unsigned char)(shsigalgs->sigalg & 0xff);
2797 if (rhash != NULL)
2798 *rhash = (unsigned char)((shsigalgs->sigalg >> 8) & 0xff);
38b051a1 2799 return (int)sc->shared_sigalgslen;
0f113f3e
MC		 2800}
2801
787ebcaf
DSH		 2802/* Maximum possible number of unique entries in sigalgs array */
2803#define TLS_MAX_SIGALGCNT (OSSL_NELEM(sigalg_lookup_tbl) * 2)
0f229cce 2804
0f113f3e
MC		 2805typedef struct {
2806 size_t sigalgcnt;
fd5e1a8c
BK		 2807 /* TLSEXT_SIGALG_XXX values */
2808 uint16_t sigalgs[TLS_MAX_SIGALGCNT];
0f113f3e 2809} sig_cb_st;
0f229cce 2810
431f458d
DSH		 2811static void get_sigorhash(int *psig, int *phash, const char *str)
2812{
2813 if (strcmp(str, "RSA") == 0) {
2814 *psig = EVP_PKEY_RSA;
b2eb6998
DSH		 2815 } else if (strcmp(str, "RSA-PSS") == 0 || strcmp(str, "PSS") == 0) {
2816 *psig = EVP_PKEY_RSA_PSS;
431f458d
DSH		 2817 } else if (strcmp(str, "DSA") == 0) {
2818 *psig = EVP_PKEY_DSA;
2819 } else if (strcmp(str, "ECDSA") == 0) {
2820 *psig = EVP_PKEY_EC;
2821 } else {
2822 *phash = OBJ_sn2nid(str);
2823 if (*phash == NID_undef)
2824 *phash = OBJ_ln2nid(str);
2825 }
2826}
787ebcaf
DSH		 2827/* Maximum length of a signature algorithm string component */
2828#define TLS_MAX_SIGSTRING_LEN 40
431f458d 2829
0f229cce 2830static int sig_cb(const char *elem, int len, void *arg)
0f113f3e
MC		 2831{
2832 sig_cb_st *sarg = arg;
2833 size_t i;
fd5e1a8c 2834 const SIGALG_LOOKUP *s;
787ebcaf 2835 char etmp[TLS_MAX_SIGSTRING_LEN], *p;
431f458d 2836 int sig_alg = NID_undef, hash_alg = NID_undef;
2747d73c
KR		 2837 if (elem == NULL)
2838 return 0;
787ebcaf 2839 if (sarg->sigalgcnt == TLS_MAX_SIGALGCNT)
0f113f3e
MC		 2840 return 0;
2841 if (len > (int)(sizeof(etmp) - 1))
2842 return 0;
2843 memcpy(etmp, elem, len);
2844 etmp[len] = 0;
2845 p = strchr(etmp, '+');
fd5e1a8c
BK		 2846 /*
2847 * We only allow SignatureSchemes listed in the sigalg_lookup_tbl;
2848 * if there's no '+' in the provided name, look for the new-style combined
2849 * name. If not, match both sig+hash to find the needed SIGALG_LOOKUP.
2850 * Just sig+hash is not unique since TLS 1.3 adds rsa_pss_pss_* and
2851 * rsa_pss_rsae_* that differ only by public key OID; in such cases
2852 * we will pick the _rsae_ variant, by virtue of them appearing earlier
2853 * in the table.
2854 */
8a43a42a 2855 if (p == NULL) {
8a43a42a
DSH		 2856 for (i = 0, s = sigalg_lookup_tbl; i < OSSL_NELEM(sigalg_lookup_tbl);
2857 i++, s++) {
2858 if (s->name != NULL && strcmp(etmp, s->name) == 0) {
fd5e1a8c 2859 sarg->sigalgs[sarg->sigalgcnt++] = s->sigalg;
8a43a42a
DSH		 2860 break;
2861 }
2862 }
fd5e1a8c
BK		 2863 if (i == OSSL_NELEM(sigalg_lookup_tbl))
2864 return 0;
8a43a42a
DSH		 2865 } else {
2866 *p = 0;
2867 p++;
2868 if (*p == 0)
2869 return 0;
2870 get_sigorhash(&sig_alg, &hash_alg, etmp);
2871 get_sigorhash(&sig_alg, &hash_alg, p);
fd5e1a8c
BK		 2872 if (sig_alg == NID_undef || hash_alg == NID_undef)
2873 return 0;
2874 for (i = 0, s = sigalg_lookup_tbl; i < OSSL_NELEM(sigalg_lookup_tbl);
2875 i++, s++) {
2876 if (s->hash == hash_alg && s->sig == sig_alg) {
2877 sarg->sigalgs[sarg->sigalgcnt++] = s->sigalg;
2878 break;
2879 }
2880 }
2881 if (i == OSSL_NELEM(sigalg_lookup_tbl))
2882 return 0;
8a43a42a 2883 }
0f113f3e 2884
fd5e1a8c
BK		 2885 /* Reject duplicates */
2886 for (i = 0; i < sarg->sigalgcnt - 1; i++) {
c1acef92 2887 if (sarg->sigalgs[i] == sarg->sigalgs[sarg->sigalgcnt - 1]) {
fd5e1a8c 2888 sarg->sigalgcnt--;
0f113f3e 2889 return 0;
fd5e1a8c 2890 }
0f113f3e 2891 }
0f113f3e
MC		 2892 return 1;
2893}
2894
2895/*
9d22666e 2896 * Set supported signature algorithms based on a colon separated list of the
0f113f3e
MC		 2897 * form sig+hash e.g. RSA+SHA512:DSA+SHA512
2898 */
3dbc46df 2899int tls1_set_sigalgs_list(CERT *c, const char *str, int client)
0f113f3e
MC		 2900{
2901 sig_cb_st sig;
2902 sig.sigalgcnt = 0;
2903 if (!CONF_parse_list(str, ':', 1, sig_cb, &sig))
2904 return 0;
2905 if (c == NULL)
2906 return 1;
fd5e1a8c
BK		 2907 return tls1_set_raw_sigalgs(c, sig.sigalgs, sig.sigalgcnt, client);
2908}
2909
2910int tls1_set_raw_sigalgs(CERT *c, const uint16_t *psigs, size_t salglen,
2911 int client)
2912{
2913 uint16_t *sigalgs;
2914
e077455e 2915 if ((sigalgs = OPENSSL_malloc(salglen * sizeof(*sigalgs))) == NULL)
fd5e1a8c
BK		 2916 return 0;
2917 memcpy(sigalgs, psigs, salglen * sizeof(*sigalgs));
2918
2919 if (client) {
2920 OPENSSL_free(c->client_sigalgs);
2921 c->client_sigalgs = sigalgs;
2922 c->client_sigalgslen = salglen;
2923 } else {
2924 OPENSSL_free(c->conf_sigalgs);
2925 c->conf_sigalgs = sigalgs;
2926 c->conf_sigalgslen = salglen;
2927 }
2928
2929 return 1;
0f113f3e
MC		 2930}
2931
a230b26e 2932int tls1_set_sigalgs(CERT *c, const int *psig_nids, size_t salglen, int client)
0f113f3e 2933{
98c792d1 2934 uint16_t *sigalgs, *sptr;
0f113f3e 2935 size_t i;
63c1df09 2936
0f113f3e
MC		 2937 if (salglen & 1)
2938 return 0;
e077455e 2939 if ((sigalgs = OPENSSL_malloc((salglen / 2) * sizeof(*sigalgs))) == NULL)
0f113f3e
MC		 2940 return 0;
2941 for (i = 0, sptr = sigalgs; i < salglen; i += 2) {
63c1df09 2942 size_t j;
7a531ee4 2943 const SIGALG_LOOKUP *curr;
63c1df09
MC		 2944 int md_id = *psig_nids++;
2945 int sig_id = *psig_nids++;
2946
2947 for (j = 0, curr = sigalg_lookup_tbl; j < OSSL_NELEM(sigalg_lookup_tbl);
2948 j++, curr++) {
fe3066ee 2949 if (curr->hash == md_id && curr->sig == sig_id) {
63c1df09
MC		 2950 *sptr++ = curr->sigalg;
2951 break;
2952 }
2953 }
0f113f3e 2954
63c1df09 2955 if (j == OSSL_NELEM(sigalg_lookup_tbl))
0f113f3e 2956 goto err;
0f113f3e
MC		 2957 }
2958
2959 if (client) {
b548a1f1 2960 OPENSSL_free(c->client_sigalgs);
0f113f3e 2961 c->client_sigalgs = sigalgs;
7a531ee4 2962 c->client_sigalgslen = salglen / 2;
0f113f3e 2963 } else {
b548a1f1 2964 OPENSSL_free(c->conf_sigalgs);
0f113f3e 2965 c->conf_sigalgs = sigalgs;
7a531ee4 2966 c->conf_sigalgslen = salglen / 2;
0f113f3e
MC		 2967 }
2968
2969 return 1;
2970
2971 err:
2972 OPENSSL_free(sigalgs);
2973 return 0;
2974}
4453cd8c 2975
38b051a1 2976static int tls1_check_sig_alg(SSL_CONNECTION *s, X509 *x, int default_nid)
0f113f3e 2977{
5235ef44 2978 int sig_nid, use_pc_sigalgs = 0;
0f113f3e 2979 size_t i;
5235ef44
MC		 2980 const SIGALG_LOOKUP *sigalg;
2981 size_t sigalgslen;
38b051a1 2982
0f113f3e
MC		 2983 if (default_nid == -1)
2984 return 1;
2985 sig_nid = X509_get_signature_nid(x);
2986 if (default_nid)
2987 return sig_nid == default_nid ? 1 : 0;
5235ef44 2988
38b051a1 2989 if (SSL_CONNECTION_IS_TLS13(s) && s->s3.tmp.peer_cert_sigalgs != NULL) {
5235ef44
MC		 2990 /*
2991 * If we're in TLSv1.3 then we only get here if we're checking the
2992 * chain. If the peer has specified peer_cert_sigalgs then we use them
2993 * otherwise we default to normal sigalgs.
2994 */
2995 sigalgslen = s->s3.tmp.peer_cert_sigalgslen;
2996 use_pc_sigalgs = 1;
2997 } else {
2998 sigalgslen = s->shared_sigalgslen;
2999 }
3000 for (i = 0; i < sigalgslen; i++) {
3001 sigalg = use_pc_sigalgs
263ff2c9 3002 ? tls1_lookup_sigalg(s, s->s3.tmp.peer_cert_sigalgs[i])
5235ef44 3003 : s->shared_sigalgs[i];
a87f3fe0 3004 if (sigalg != NULL && sig_nid == sigalg->sigandhash)
0f113f3e 3005 return 1;
5235ef44 3006 }
0f113f3e
MC		 3007 return 0;
3008}
3009
6dbb6219
DSH		 3010/* Check to see if a certificate issuer name matches list of CA names */
3011static int ssl_check_ca_name(STACK_OF(X509_NAME) *names, X509 *x)
0f113f3e 3012{
8cc86b81 3013 const X509_NAME *nm;
0f113f3e
MC		 3014 int i;
3015 nm = X509_get_issuer_name(x);
3016 for (i = 0; i < sk_X509_NAME_num(names); i++) {
3017 if (!X509_NAME_cmp(nm, sk_X509_NAME_value(names, i)))
3018 return 1;
3019 }
3020 return 0;
3021}
3022
3023/*
3024 * Check certificate chain is consistent with TLS extensions and is usable by
3025 * server. This servers two purposes: it allows users to check chains before
3026 * passing them to the server and it allows the server to check chains before
3027 * attempting to use them.
d61ff83b 3028 */
6dbb6219 3029
69687aa8 3030/* Flags which need to be set for a certificate when strict mode not set */
6dbb6219 3031
e481f9b9 3032#define CERT_PKEY_VALID_FLAGS \
0f113f3e 3033 (CERT_PKEY_EE_SIGNATURE|CERT_PKEY_EE_PARAM)
6dbb6219 3034/* Strict mode flags */
e481f9b9 3035#define CERT_PKEY_STRICT_FLAGS \
0f113f3e
MC		 3036 (CERT_PKEY_VALID_FLAGS|CERT_PKEY_CA_SIGNATURE|CERT_PKEY_CA_PARAM \
3037 | CERT_PKEY_ISSUER_NAME|CERT_PKEY_CERT_TYPE)
6dbb6219 3038
38b051a1
TM		 3039int tls1_check_chain(SSL_CONNECTION *s, X509 *x, EVP_PKEY *pk,
3040 STACK_OF(X509) *chain, int idx)
0f113f3e
MC		 3041{
3042 int i;
3043 int rv = 0;
3044 int check_flags = 0, strict_mode;
3045 CERT_PKEY *cpk = NULL;
3046 CERT *c = s->cert;
f7d53487 3047 uint32_t *pvalid;
0f113f3e 3048 unsigned int suiteb_flags = tls1_suiteb(s);
38b051a1 3049
0f113f3e
MC		 3050 /* idx == -1 means checking server chains */
3051 if (idx != -1) {
3052 /* idx == -2 means checking client certificate chains */
3053 if (idx == -2) {
3054 cpk = c->key;
348240c6 3055 idx = (int)(cpk - c->pkeys);
0f113f3e
MC		 3056 } else
3057 cpk = c->pkeys + idx;
555cbb32 3058 pvalid = s->s3.tmp.valid_flags + idx;
0f113f3e
MC		 3059 x = cpk->x509;
3060 pk = cpk->privatekey;
3061 chain = cpk->chain;
3062 strict_mode = c->cert_flags & SSL_CERT_FLAGS_CHECK_TLS_STRICT;
3063 /* If no cert or key, forget it */
3064 if (!x || !pk)
3065 goto end;
0f113f3e 3066 } else {
52fd27f9
DSH		 3067 size_t certidx;
3068
0f113f3e 3069 if (!x || !pk)
d813f9eb 3070 return 0;
52fd27f9 3071
ee58915c
MB		 3072 if (ssl_cert_lookup_by_pkey(pk, &certidx,
3073 SSL_CONNECTION_GET_CTX(s)) == NULL)
d813f9eb 3074 return 0;
52fd27f9 3075 idx = certidx;
555cbb32 3076 pvalid = s->s3.tmp.valid_flags + idx;
6383d316 3077
0f113f3e
MC		 3078 if (c->cert_flags & SSL_CERT_FLAGS_CHECK_TLS_STRICT)
3079 check_flags = CERT_PKEY_STRICT_FLAGS;
3080 else
3081 check_flags = CERT_PKEY_VALID_FLAGS;
3082 strict_mode = 1;
3083 }
3084
3085 if (suiteb_flags) {
3086 int ok;
3087 if (check_flags)
3088 check_flags |= CERT_PKEY_SUITEB;
3089 ok = X509_chain_check_suiteb(NULL, x, chain, suiteb_flags);
3090 if (ok == X509_V_OK)
3091 rv |= CERT_PKEY_SUITEB;
3092 else if (!check_flags)
3093 goto end;
3094 }
3095
3096 /*
3097 * Check all signature algorithms are consistent with signature
3098 * algorithms extension if TLS 1.2 or later and strict mode.
3099 */
38b051a1
TM		 3100 if (TLS1_get_version(SSL_CONNECTION_GET_SSL(s)) >= TLS1_2_VERSION
3101 && strict_mode) {
0f113f3e 3102 int default_nid;
536199ec 3103 int rsign = 0;
38b051a1 3104
555cbb32
TS		 3105 if (s->s3.tmp.peer_cert_sigalgs != NULL
3106 || s->s3.tmp.peer_sigalgs != NULL) {
0f113f3e
MC		 3107 default_nid = 0;
3108 /* If no sigalgs extension use defaults from RFC5246 */
c589c34e 3109 } else {
0f113f3e 3110 switch (idx) {
d0ff28f8 3111 case SSL_PKEY_RSA:
536199ec 3112 rsign = EVP_PKEY_RSA;
0f113f3e
MC		 3113 default_nid = NID_sha1WithRSAEncryption;
3114 break;
3115
3116 case SSL_PKEY_DSA_SIGN:
536199ec 3117 rsign = EVP_PKEY_DSA;
0f113f3e
MC		 3118 default_nid = NID_dsaWithSHA1;
3119 break;
3120
3121 case SSL_PKEY_ECC:
536199ec 3122 rsign = EVP_PKEY_EC;
0f113f3e
MC		 3123 default_nid = NID_ecdsa_with_SHA1;
3124 break;
3125
e44380a9 3126 case SSL_PKEY_GOST01:
536199ec 3127 rsign = NID_id_GostR3410_2001;
e44380a9
DB		 3128 default_nid = NID_id_GostR3411_94_with_GostR3410_2001;
3129 break;
3130
3131 case SSL_PKEY_GOST12_256:
536199ec 3132 rsign = NID_id_GostR3410_2012_256;
e44380a9
DB		 3133 default_nid = NID_id_tc26_signwithdigest_gost3410_2012_256;
3134 break;
3135
3136 case SSL_PKEY_GOST12_512:
536199ec 3137 rsign = NID_id_GostR3410_2012_512;
e44380a9
DB		 3138 default_nid = NID_id_tc26_signwithdigest_gost3410_2012_512;
3139 break;
3140
0f113f3e
MC		 3141 default:
3142 default_nid = -1;
3143 break;
3144 }
3145 }
3146 /*
3147 * If peer sent no signature algorithms extension and we have set
3148 * preferred signature algorithms check we support sha1.
3149 */
3150 if (default_nid > 0 && c->conf_sigalgs) {
3151 size_t j;
98c792d1 3152 const uint16_t *p = c->conf_sigalgs;
703bcee0 3153 for (j = 0; j < c->conf_sigalgslen; j++, p++) {
263ff2c9 3154 const SIGALG_LOOKUP *lu = tls1_lookup_sigalg(s, *p);
44b6318f
DSH		 3155
3156 if (lu != NULL && lu->hash == NID_sha1 && lu->sig == rsign)
0f113f3e
MC		 3157 break;
3158 }
3159 if (j == c->conf_sigalgslen) {
3160 if (check_flags)
3161 goto skip_sigs;
3162 else
3163 goto end;
3164 }
3165 }
3166 /* Check signature algorithm of each cert in chain */
38b051a1 3167 if (SSL_CONNECTION_IS_TLS13(s)) {
5235ef44
MC		 3168 /*
3169 * We only get here if the application has called SSL_check_chain(),
3170 * so check_flags is always set.
3171 */
3172 if (find_sig_alg(s, x, pk) != NULL)
3173 rv |= CERT_PKEY_EE_SIGNATURE;
3174 } else if (!tls1_check_sig_alg(s, x, default_nid)) {
0f113f3e
MC		 3175 if (!check_flags)
3176 goto end;
3177 } else
3178 rv |= CERT_PKEY_EE_SIGNATURE;
3179 rv |= CERT_PKEY_CA_SIGNATURE;
3180 for (i = 0; i < sk_X509_num(chain); i++) {
29948ac8 3181 if (!tls1_check_sig_alg(s, sk_X509_value(chain, i), default_nid)) {
0f113f3e
MC		 3182 if (check_flags) {
3183 rv &= ~CERT_PKEY_CA_SIGNATURE;
3184 break;
3185 } else
3186 goto end;
3187 }
3188 }
3189 }
3190 /* Else not TLS 1.2, so mark EE and CA signing algorithms OK */
3191 else if (check_flags)
3192 rv |= CERT_PKEY_EE_SIGNATURE | CERT_PKEY_CA_SIGNATURE;
3193 skip_sigs:
3194 /* Check cert parameters are consistent */
9195ddcd 3195 if (tls1_check_cert_param(s, x, 1))
0f113f3e
MC		 3196 rv |= CERT_PKEY_EE_PARAM;
3197 else if (!check_flags)
3198 goto end;
3199 if (!s->server)
3200 rv |= CERT_PKEY_CA_PARAM;
3201 /* In strict mode check rest of chain too */
3202 else if (strict_mode) {
3203 rv |= CERT_PKEY_CA_PARAM;
3204 for (i = 0; i < sk_X509_num(chain); i++) {
3205 X509 *ca = sk_X509_value(chain, i);
3206 if (!tls1_check_cert_param(s, ca, 0)) {
3207 if (check_flags) {
3208 rv &= ~CERT_PKEY_CA_PARAM;
3209 break;
3210 } else
3211 goto end;
3212 }
3213 }
3214 }
3215 if (!s->server && strict_mode) {
3216 STACK_OF(X509_NAME) *ca_dn;
3217 int check_type = 0;
c2041da8
RL		 3218
3219 if (EVP_PKEY_is_a(pk, "RSA"))
0f113f3e 3220 check_type = TLS_CT_RSA_SIGN;
c2041da8 3221 else if (EVP_PKEY_is_a(pk, "DSA"))
0f113f3e 3222 check_type = TLS_CT_DSS_SIGN;
c2041da8 3223 else if (EVP_PKEY_is_a(pk, "EC"))
0f113f3e 3224 check_type = TLS_CT_ECDSA_SIGN;
c2041da8 3225
0f113f3e 3226 if (check_type) {
555cbb32 3227 const uint8_t *ctypes = s->s3.tmp.ctype;
75c13e78
DSH		 3228 size_t j;
3229
555cbb32 3230 for (j = 0; j < s->s3.tmp.ctype_len; j++, ctypes++) {
75c13e78 3231 if (*ctypes == check_type) {
0f113f3e
MC		 3232 rv |= CERT_PKEY_CERT_TYPE;
3233 break;
3234 }
3235 }
3236 if (!(rv & CERT_PKEY_CERT_TYPE) && !check_flags)
3237 goto end;
75c13e78 3238 } else {
0f113f3e 3239 rv |= CERT_PKEY_CERT_TYPE;
75c13e78 3240 }
0f113f3e 3241
555cbb32 3242 ca_dn = s->s3.tmp.peer_ca_names;
0f113f3e 3243
89dd8543
TM		 3244 if (ca_dn == NULL
3245 || sk_X509_NAME_num(ca_dn) == 0
3246 || ssl_check_ca_name(ca_dn, x))
0f113f3e 3247 rv |= CERT_PKEY_ISSUER_NAME;
89dd8543 3248 else
0f113f3e
MC		 3249 for (i = 0; i < sk_X509_num(chain); i++) {
3250 X509 *xtmp = sk_X509_value(chain, i);
89dd8543 3251
0f113f3e
MC		 3252 if (ssl_check_ca_name(ca_dn, xtmp)) {
3253 rv |= CERT_PKEY_ISSUER_NAME;
3254 break;
3255 }
3256 }
89dd8543 3257
0f113f3e
MC		 3258 if (!check_flags && !(rv & CERT_PKEY_ISSUER_NAME))
3259 goto end;
3260 } else
3261 rv |= CERT_PKEY_ISSUER_NAME | CERT_PKEY_CERT_TYPE;
3262
3263 if (!check_flags || (rv & check_flags) == check_flags)
3264 rv |= CERT_PKEY_VALID;
3265
3266 end:
3267
38b051a1 3268 if (TLS1_get_version(SSL_CONNECTION_GET_SSL(s)) >= TLS1_2_VERSION)
a8bb912d
DSH		 3269 rv |= *pvalid & (CERT_PKEY_EXPLICIT_SIGN | CERT_PKEY_SIGN);
3270 else
0f113f3e
MC		 3271 rv |= CERT_PKEY_SIGN | CERT_PKEY_EXPLICIT_SIGN;
3272
3273 /*
3274 * When checking a CERT_PKEY structure all flags are irrelevant if the
3275 * chain is invalid.
3276 */
3277 if (!check_flags) {
a8bb912d 3278 if (rv & CERT_PKEY_VALID) {
6383d316 3279 *pvalid = rv;
a8bb912d
DSH		 3280 } else {
3281 /* Preserve sign and explicit sign flag, clear rest */
3282 *pvalid &= CERT_PKEY_EXPLICIT_SIGN | CERT_PKEY_SIGN;
0f113f3e
MC		 3283 return 0;
3284 }
3285 }
3286 return rv;
3287}
d61ff83b
DSH		 3288
3289/* Set validity of certificates in an SSL structure */
38b051a1 3290void tls1_set_cert_validity(SSL_CONNECTION *s)
0f113f3e 3291{
d0ff28f8 3292 tls1_check_chain(s, NULL, NULL, NULL, SSL_PKEY_RSA);
045d078a 3293 tls1_check_chain(s, NULL, NULL, NULL, SSL_PKEY_RSA_PSS_SIGN);
17dd65e6 3294 tls1_check_chain(s, NULL, NULL, NULL, SSL_PKEY_DSA_SIGN);
17dd65e6 3295 tls1_check_chain(s, NULL, NULL, NULL, SSL_PKEY_ECC);
e44380a9
DB		 3296 tls1_check_chain(s, NULL, NULL, NULL, SSL_PKEY_GOST01);
3297 tls1_check_chain(s, NULL, NULL, NULL, SSL_PKEY_GOST12_256);
3298 tls1_check_chain(s, NULL, NULL, NULL, SSL_PKEY_GOST12_512);
3d234c9e 3299 tls1_check_chain(s, NULL, NULL, NULL, SSL_PKEY_ED25519);
0e1d6ecf 3300 tls1_check_chain(s, NULL, NULL, NULL, SSL_PKEY_ED448);
0f113f3e
MC		 3301}
3302
69687aa8 3303/* User level utility function to check a chain is suitable */
18d71588 3304int SSL_check_chain(SSL *s, X509 *x, EVP_PKEY *pk, STACK_OF(X509) *chain)
0f113f3e 3305{
38b051a1
TM		 3306 SSL_CONNECTION *sc = SSL_CONNECTION_FROM_SSL(s);
3307
3308 if (sc == NULL)
3309 return 0;
3310
3311 return tls1_check_chain(sc, x, pk, chain, -1);
0f113f3e 3312}
d61ff83b 3313
38b051a1 3314EVP_PKEY *ssl_get_auto_dh(SSL_CONNECTION *s)
0f113f3e 3315{
091f6074
MC		 3316 EVP_PKEY *dhp = NULL;
3317 BIGNUM *p;
d7b5c648 3318 int dh_secbits = 80, sec_level_bits;
091f6074
MC		 3319 EVP_PKEY_CTX *pctx = NULL;
3320 OSSL_PARAM_BLD *tmpl = NULL;
3321 OSSL_PARAM *params = NULL;
38b051a1 3322 SSL_CTX *sctx = SSL_CONNECTION_GET_CTX(s);
091f6074 3323
7646610b
HK		 3324 if (s->cert->dh_tmp_auto != 2) {
3325 if (s->s3.tmp.new_cipher->algorithm_auth & (SSL_aNULL | SSL_aPSK)) {
3326 if (s->s3.tmp.new_cipher->strength_bits == 256)
3327 dh_secbits = 128;
3328 else
3329 dh_secbits = 80;
3330 } else {
3331 if (s->s3.tmp.cert == NULL)
3332 return NULL;
ed576acd 3333 dh_secbits = EVP_PKEY_get_security_bits(s->s3.tmp.cert->privatekey);
7646610b 3334 }
0f113f3e
MC		 3335 }
3336
d7b5c648 3337 /* Do not pick a prime that is too weak for the current security level */
38b051a1
TM		 3338 sec_level_bits = ssl_get_security_level_bits(SSL_CONNECTION_GET_SSL(s),
3339 NULL, NULL);
d7b5c648
P		 3340 if (dh_secbits < sec_level_bits)
3341 dh_secbits = sec_level_bits;
3342
7646610b
HK		 3343 if (dh_secbits >= 192)
3344 p = BN_get_rfc3526_prime_8192(NULL);
3345 else if (dh_secbits >= 152)
3346 p = BN_get_rfc3526_prime_4096(NULL);
3347 else if (dh_secbits >= 128)
3348 p = BN_get_rfc3526_prime_3072(NULL);
3349 else if (dh_secbits >= 112)
3350 p = BN_get_rfc3526_prime_2048(NULL);
3351 else
3352 p = BN_get_rfc2409_prime_1024(NULL);
091f6074
MC		 3353 if (p == NULL)
3354 goto err;
3355
38b051a1 3356 pctx = EVP_PKEY_CTX_new_from_name(sctx->libctx, "DH", sctx->propq);
091f6074 3357 if (pctx == NULL
2db985b7 3358 || EVP_PKEY_fromdata_init(pctx) != 1)
091f6074
MC		 3359 goto err;
3360
3361 tmpl = OSSL_PARAM_BLD_new();
3362 if (tmpl == NULL
3363 || !OSSL_PARAM_BLD_push_BN(tmpl, OSSL_PKEY_PARAM_FFC_P, p)
3364 || !OSSL_PARAM_BLD_push_uint(tmpl, OSSL_PKEY_PARAM_FFC_G, 2))
3365 goto err;
3366
3367 params = OSSL_PARAM_BLD_to_param(tmpl);
2db985b7
SL		 3368 if (params == NULL
3369 || EVP_PKEY_fromdata(pctx, &dhp, EVP_PKEY_KEY_PARAMETERS, params) != 1)
091f6074
MC		 3370 goto err;
3371
3372err:
3f883c7c 3373 OSSL_PARAM_free(params);
091f6074
MC		 3374 OSSL_PARAM_BLD_free(tmpl);
3375 EVP_PKEY_CTX_free(pctx);
3376 BN_free(p);
7646610b 3377 return dhp;
0f113f3e 3378}
b362ccab 3379
38b051a1
TM		 3380static int ssl_security_cert_key(SSL_CONNECTION *s, SSL_CTX *ctx, X509 *x,
3381 int op)
0f113f3e 3382{
72245f34 3383 int secbits = -1;
8382fd3a 3384 EVP_PKEY *pkey = X509_get0_pubkey(x);
38b051a1 3385
0f113f3e 3386 if (pkey) {
72245f34
DSH		 3387 /*
3388 * If no parameters this will return -1 and fail using the default
3389 * security callback for any non-zero security level. This will
3390 * reject keys which omit parameters but this only affects DSA and
3391 * omission of parameters is never (?) done in practice.
3392 */
ed576acd 3393 secbits = EVP_PKEY_get_security_bits(pkey);
72245f34 3394 }
38b051a1 3395 if (s != NULL)
0f113f3e
MC		 3396 return ssl_security(s, op, secbits, 0, x);
3397 else
3398 return ssl_ctx_security(ctx, op, secbits, 0, x);
3399}
b362ccab 3400
38b051a1
TM		 3401static int ssl_security_cert_sig(SSL_CONNECTION *s, SSL_CTX *ctx, X509 *x,
3402 int op)
0f113f3e
MC		 3403{
3404 /* Lookup signature algorithm digest */
65e89736 3405 int secbits, nid, pknid;
38b051a1 3406
221c7b55
DSH		 3407 /* Don't check signature if self signed */
3408 if ((X509_get_extension_flags(x) & EXFLAG_SS) != 0)
3409 return 1;
65e89736
DSH		 3410 if (!X509_get_signature_info(x, &nid, &pknid, &secbits, NULL))
3411 secbits = -1;
3412 /* If digest NID not defined use signature NID */
3413 if (nid == NID_undef)
3414 nid = pknid;
38b051a1 3415 if (s != NULL)
65e89736 3416 return ssl_security(s, op, secbits, nid, x);
0f113f3e 3417 else
65e89736 3418 return ssl_ctx_security(ctx, op, secbits, nid, x);
0f113f3e 3419}
b362ccab 3420
38b051a1
TM		 3421int ssl_security_cert(SSL_CONNECTION *s, SSL_CTX *ctx, X509 *x, int vfy,
3422 int is_ee)
0f113f3e
MC		 3423{
3424 if (vfy)
3425 vfy = SSL_SECOP_PEER;
3426 if (is_ee) {
3427 if (!ssl_security_cert_key(s, ctx, x, SSL_SECOP_EE_KEY | vfy))
3428 return SSL_R_EE_KEY_TOO_SMALL;
3429 } else {
3430 if (!ssl_security_cert_key(s, ctx, x, SSL_SECOP_CA_KEY | vfy))
3431 return SSL_R_CA_KEY_TOO_SMALL;
3432 }
3433 if (!ssl_security_cert_sig(s, ctx, x, SSL_SECOP_CA_MD | vfy))
3434 return SSL_R_CA_MD_TOO_WEAK;
3435 return 1;
3436}
3437
3438/*
69687aa8
F		 3439 * Check security of a chain, if |sk| includes the end entity certificate then
3440 * |x| is NULL. If |vfy| is 1 then we are verifying a peer chain and not sending
0f113f3e 3441 * one to the peer. Return values: 1 if ok otherwise error code to use
b362ccab
DSH		 3442 */
3443
38b051a1
TM		 3444int ssl_security_cert_chain(SSL_CONNECTION *s, STACK_OF(X509) *sk,
3445 X509 *x, int vfy)
0f113f3e
MC		 3446{
3447 int rv, start_idx, i;
38b051a1 3448
0f113f3e
MC		 3449 if (x == NULL) {
3450 x = sk_X509_value(sk, 0);
dc0ef292
BE		 3451 if (x == NULL)
3452 return ERR_R_INTERNAL_ERROR;
0f113f3e
MC		 3453 start_idx = 1;
3454 } else
3455 start_idx = 0;
3456
3457 rv = ssl_security_cert(s, NULL, x, vfy, 1);
3458 if (rv != 1)
3459 return rv;
3460
3461 for (i = start_idx; i < sk_X509_num(sk); i++) {
3462 x = sk_X509_value(sk, i);
3463 rv = ssl_security_cert(s, NULL, x, vfy, 0);
3464 if (rv != 1)
3465 return rv;
3466 }
3467 return 1;
3468}
93a77f9e 3469
7f6b466b
DSH		 3470/*
3471 * For TLS 1.2 servers check if we have a certificate which can be used
b46867d7 3472 * with the signature algorithm "lu" and return index of certificate.
7f6b466b
DSH		 3473 */
3474
38b051a1
TM		 3475static int tls12_get_cert_sigalg_idx(const SSL_CONNECTION *s,
3476 const SIGALG_LOOKUP *lu)
7f6b466b 3477{
b46867d7 3478 int sig_idx = lu->sig_idx;
ee58915c
MB		 3479 const SSL_CERT_LOOKUP *clu = ssl_cert_lookup_by_idx(sig_idx,
3480 SSL_CONNECTION_GET_CTX(s));
7f6b466b
DSH		 3481
3482 /* If not recognised or not supported by cipher mask it is not suitable */
b8fef8ee 3483 if (clu == NULL
555cbb32 3484 || (clu->amask & s->s3.tmp.new_cipher->algorithm_auth) == 0
b8fef8ee 3485 || (clu->nid == EVP_PKEY_RSA_PSS
555cbb32 3486 && (s->s3.tmp.new_cipher->algorithm_mkey & SSL_kRSA) != 0))
b46867d7
DSH		 3487 return -1;
3488
555cbb32 3489 return s->s3.tmp.valid_flags[sig_idx] & CERT_PKEY_VALID ? sig_idx : -1;
7f6b466b
DSH		 3490}
3491
c589c34e 3492/*
5235ef44
MC		 3493 * Checks the given cert against signature_algorithm_cert restrictions sent by
3494 * the peer (if any) as well as whether the hash from the sigalg is usable with
3495 * the key.
3496 * Returns true if the cert is usable and false otherwise.
c589c34e 3497 */
38b051a1
TM		 3498static int check_cert_usable(SSL_CONNECTION *s, const SIGALG_LOOKUP *sig,
3499 X509 *x, EVP_PKEY *pkey)
c589c34e
BK		 3500{
3501 const SIGALG_LOOKUP *lu;
ecbb2fca 3502 int mdnid, pknid, supported;
c589c34e 3503 size_t i;
e9fe0f7e 3504 const char *mdname = NULL;
38b051a1 3505 SSL_CTX *sctx = SSL_CONNECTION_GET_CTX(s);
c589c34e 3506
b5a27688 3507 /*
e9fe0f7e 3508 * If the given EVP_PKEY cannot support signing with this digest,
b5a27688
DW		 3509 * the answer is simply 'no'.
3510 */
e9fe0f7e
TM		 3511 if (sig->hash != NID_undef)
3512 mdname = OBJ_nid2sn(sig->hash);
38b051a1 3513 supported = EVP_PKEY_digestsign_supports_digest(pkey, sctx->libctx,
e9fe0f7e 3514 mdname,
38b051a1 3515 sctx->propq);
e9fe0f7e 3516 if (supported <= 0)
b5a27688
DW		 3517 return 0;
3518
3519 /*
3520 * The TLS 1.3 signature_algorithms_cert extension places restrictions
3521 * on the sigalg with which the certificate was signed (by its issuer).
3522 */
555cbb32 3523 if (s->s3.tmp.peer_cert_sigalgs != NULL) {
b5a27688
DW		 3524 if (!X509_get_signature_info(x, &mdnid, &pknid, NULL, NULL))
3525 return 0;
555cbb32 3526 for (i = 0; i < s->s3.tmp.peer_cert_sigalgslen; i++) {
263ff2c9 3527 lu = tls1_lookup_sigalg(s, s->s3.tmp.peer_cert_sigalgs[i]);
b5a27688 3528 if (lu == NULL)
c589c34e 3529 continue;
ecbb2fca 3530
5235ef44 3531 /*
407820c0 3532 * This does not differentiate between the
b5a27688
DW		 3533 * rsa_pss_pss_* and rsa_pss_rsae_* schemes since we do not
3534 * have a chain here that lets us look at the key OID in the
3535 * signing certificate.
5235ef44 3536 */
b5a27688
DW		 3537 if (mdnid == lu->hash && pknid == lu->sig)
3538 return 1;
c589c34e
BK		 3539 }
3540 return 0;
3541 }
b5a27688 3542
5235ef44 3543 /*
b5a27688
DW		 3544 * Without signat_algorithms_cert, any certificate for which we have
3545 * a viable public key is permitted.
5235ef44 3546 */
ecbb2fca 3547 return 1;
c589c34e
BK		 3548}
3549
5235ef44
MC		 3550/*
3551 * Returns true if |s| has a usable certificate configured for use
3552 * with signature scheme |sig|.
3553 * "Usable" includes a check for presence as well as applying
3554 * the signature_algorithm_cert restrictions sent by the peer (if any).
3555 * Returns false if no usable certificate is found.
3556 */
38b051a1 3557static int has_usable_cert(SSL_CONNECTION *s, const SIGALG_LOOKUP *sig, int idx)
5235ef44
MC		 3558{
3559 /* TLS 1.2 callers can override sig->sig_idx, but not TLS 1.3 callers. */
3560 if (idx == -1)
3561 idx = sig->sig_idx;
3562 if (!ssl_has_cert(s, idx))
3563 return 0;
3564
3565 return check_cert_usable(s, sig, s->cert->pkeys[idx].x509,
3566 s->cert->pkeys[idx].privatekey);
3567}
3568
3569/*
3570 * Returns true if the supplied cert |x| and key |pkey| is usable with the
3571 * specified signature scheme |sig|, or false otherwise.
3572 */
38b051a1 3573static int is_cert_usable(SSL_CONNECTION *s, const SIGALG_LOOKUP *sig, X509 *x,
5235ef44
MC		 3574 EVP_PKEY *pkey)
3575{
3576 size_t idx;
3577
ee58915c 3578 if (ssl_cert_lookup_by_pkey(pkey, &idx, SSL_CONNECTION_GET_CTX(s)) == NULL)
5235ef44
MC		 3579 return 0;
3580
3581 /* Check the key is consistent with the sig alg */
3582 if ((int)idx != sig->sig_idx)
3583 return 0;
3584
3585 return check_cert_usable(s, sig, x, pkey);
3586}
3587
3588/*
3589 * Find a signature scheme that works with the supplied certificate |x| and key
3590 * |pkey|. |x| and |pkey| may be NULL in which case we additionally look at our
3591 * available certs/keys to find one that works.
3592 */
38b051a1
TM		 3593static const SIGALG_LOOKUP *find_sig_alg(SSL_CONNECTION *s, X509 *x,
3594 EVP_PKEY *pkey)
5235ef44
MC		 3595{
3596 const SIGALG_LOOKUP *lu = NULL;
3597 size_t i;
5235ef44 3598 int curve = -1;
5235ef44 3599 EVP_PKEY *tmppkey;
38b051a1 3600 SSL_CTX *sctx = SSL_CONNECTION_GET_CTX(s);
5235ef44
MC		 3601
3602 /* Look for a shared sigalgs matching possible certificates */
3603 for (i = 0; i < s->shared_sigalgslen; i++) {
3604 lu = s->shared_sigalgs[i];
3605
3606 /* Skip SHA1, SHA224, DSA and RSA if not PSS */
3607 if (lu->hash == NID_sha1
3608 || lu->hash == NID_sha224
3609 || lu->sig == EVP_PKEY_DSA
3610 || lu->sig == EVP_PKEY_RSA)
3611 continue;
3612 /* Check that we have a cert, and signature_algorithms_cert */
38b051a1 3613 if (!tls1_lookup_md(sctx, lu, NULL))
5235ef44
MC		 3614 continue;
3615 if ((pkey == NULL && !has_usable_cert(s, lu, -1))
3616 || (pkey != NULL && !is_cert_usable(s, lu, x, pkey)))
3617 continue;
3618
3619 tmppkey = (pkey != NULL) ? pkey
3620 : s->cert->pkeys[lu->sig_idx].privatekey;
3621
3622 if (lu->sig == EVP_PKEY_EC) {
c2041da8 3623 if (curve == -1)
d8975dec 3624 curve = ssl_get_EC_curve_nid(tmppkey);
5235ef44
MC		 3625 if (lu->curve != NID_undef && curve != lu->curve)
3626 continue;
5235ef44
MC		 3627 } else if (lu->sig == EVP_PKEY_RSA_PSS) {
3628 /* validate that key is large enough for the signature algorithm */
38b051a1 3629 if (!rsa_pss_check_min_key_size(sctx, tmppkey, lu))
5235ef44
MC		 3630 continue;
3631 }
3632 break;
3633 }
3634
3635 if (i == s->shared_sigalgslen)
3636 return NULL;
3637
3638 return lu;
3639}
3640
93a77f9e
DSH		 3641/*
3642 * Choose an appropriate signature algorithm based on available certificates
717a265a
DSH		 3643 * Sets chosen certificate and signature algorithm.
3644 *
f63a17d6
MC		 3645 * For servers if we fail to find a required certificate it is a fatal error,
3646 * an appropriate error code is set and a TLS alert is sent.
717a265a 3647 *
f63a17d6 3648 * For clients fatalerrs is set to 0. If a certificate is not suitable it is not
717a265a
DSH		 3649 * a fatal error: we will either try another certificate or not present one
3650 * to the server. In this case no error is set.
93a77f9e 3651 */
38b051a1 3652int tls_choose_sigalg(SSL_CONNECTION *s, int fatalerrs)
93a77f9e 3653{
0972bc5c 3654 const SIGALG_LOOKUP *lu = NULL;
b46867d7 3655 int sig_idx = -1;
0972bc5c 3656
555cbb32
TS		 3657 s->s3.tmp.cert = NULL;
3658 s->s3.tmp.sigalg = NULL;
717a265a 3659
38b051a1 3660 if (SSL_CONNECTION_IS_TLS13(s)) {
5235ef44
MC		 3661 lu = find_sig_alg(s, NULL, NULL);
3662 if (lu == NULL) {
f63a17d6 3663 if (!fatalerrs)
717a265a 3664 return 1;
c48ffbcc 3665 SSLfatal(s, SSL_AD_HANDSHAKE_FAILURE,
f63a17d6 3666 SSL_R_NO_SUITABLE_SIGNATURE_ALGORITHM);
0972bc5c
DSH		 3667 return 0;
3668 }
3669 } else {
7f6b466b 3670 /* If ciphersuite doesn't require a cert nothing to do */
555cbb32 3671 if (!(s->s3.tmp.new_cipher->algorithm_auth & SSL_aCERT))
7f6b466b
DSH		 3672 return 1;
3673 if (!s->server && !ssl_has_cert(s, s->cert->key - s->cert->pkeys))
717a265a 3674 return 1;
0972bc5c
DSH		 3675
3676 if (SSL_USE_SIGALGS(s)) {
c589c34e 3677 size_t i;
555cbb32 3678 if (s->s3.tmp.peer_sigalgs != NULL) {
c2041da8 3679 int curve = -1;
38b051a1 3680 SSL_CTX *sctx = SSL_CONNECTION_GET_CTX(s);
599b586d
DSH		 3681
3682 /* For Suite B need to match signature algorithm to curve */
c2041da8 3683 if (tls1_suiteb(s))
d8975dec
RL		 3684 curve = ssl_get_EC_curve_nid(s->cert->pkeys[SSL_PKEY_ECC]
3685 .privatekey);
0972bc5c
DSH		 3686
3687 /*
3688 * Find highest preference signature algorithm matching
3689 * cert type
3690 */
29948ac8
BK		 3691 for (i = 0; i < s->shared_sigalgslen; i++) {
3692 lu = s->shared_sigalgs[i];
7f6b466b
DSH		 3693
3694 if (s->server) {
b46867d7 3695 if ((sig_idx = tls12_get_cert_sigalg_idx(s, lu)) == -1)
7f6b466b 3696 continue;
b46867d7
DSH		 3697 } else {
3698 int cc_idx = s->cert->key - s->cert->pkeys;
3699
3700 sig_idx = lu->sig_idx;
c589c34e
BK		 3701 if (cc_idx != sig_idx)
3702 continue;
b2021556 3703 }
c589c34e
BK		 3704 /* Check that we have a cert, and sig_algs_cert */
3705 if (!has_usable_cert(s, lu, sig_idx))
3706 continue;
0fe3db25
NR		 3707 if (lu->sig == EVP_PKEY_RSA_PSS) {
3708 /* validate that key is large enough for the signature algorithm */
bcec0b94 3709 EVP_PKEY *pkey = s->cert->pkeys[sig_idx].privatekey;
0fe3db25 3710
38b051a1 3711 if (!rsa_pss_check_min_key_size(sctx, pkey, lu))
0fe3db25
NR		 3712 continue;
3713 }
7f6b466b 3714 if (curve == -1 || lu->curve == curve)
0972bc5c
DSH		 3715 break;
3716 }
db30f432
DB		 3717#ifndef OPENSSL_NO_GOST
3718 /*
3719 * Some Windows-based implementations do not send GOST algorithms indication
3720 * in supported_algorithms extension, so when we have GOST-based ciphersuite,
3721 * we have to assume GOST support.
3722 */
38b051a1
TM		 3723 if (i == s->shared_sigalgslen
3724 && (s->s3.tmp.new_cipher->algorithm_auth
3725 & (SSL_aGOST01 | SSL_aGOST12)) != 0) {
db30f432
DB		 3726 if ((lu = tls1_get_legacy_sigalg(s, -1)) == NULL) {
3727 if (!fatalerrs)
3728 return 1;
3729 SSLfatal(s, SSL_AD_HANDSHAKE_FAILURE,
db30f432
DB		 3730 SSL_R_NO_SUITABLE_SIGNATURE_ALGORITHM);
3731 return 0;
3732 } else {
3733 i = 0;
3734 sig_idx = lu->sig_idx;
3735 }
3736 }
3737#endif
29948ac8 3738 if (i == s->shared_sigalgslen) {
f63a17d6 3739 if (!fatalerrs)
717a265a 3740 return 1;
b8fef8ee 3741 SSLfatal(s, SSL_AD_HANDSHAKE_FAILURE,
b8fef8ee 3742 SSL_R_NO_SUITABLE_SIGNATURE_ALGORITHM);
0972bc5c
DSH		 3743 return 0;
3744 }
3745 } else {
3746 /*
3747 * If we have no sigalg use defaults
3748 */
3749 const uint16_t *sent_sigs;
c589c34e 3750 size_t sent_sigslen;
0972bc5c 3751
7f6b466b 3752 if ((lu = tls1_get_legacy_sigalg(s, -1)) == NULL) {
f63a17d6 3753 if (!fatalerrs)
717a265a 3754 return 1;
b4f1b7b6 3755 SSLfatal(s, SSL_AD_HANDSHAKE_FAILURE,
a70535f8 3756 SSL_R_NO_SUITABLE_SIGNATURE_ALGORITHM);
0972bc5c
DSH		 3757 return 0;
3758 }
3759
3760 /* Check signature matches a type we sent */
3761 sent_sigslen = tls12_get_psigalgs(s, 1, &sent_sigs);
3762 for (i = 0; i < sent_sigslen; i++, sent_sigs++) {
c589c34e
BK		 3763 if (lu->sigalg == *sent_sigs
3764 && has_usable_cert(s, lu, lu->sig_idx))
0972bc5c
DSH		 3765 break;
3766 }
3767 if (i == sent_sigslen) {
f63a17d6 3768 if (!fatalerrs)
717a265a 3769 return 1;
b4f1b7b6 3770 SSLfatal(s, SSL_AD_HANDSHAKE_FAILURE,
f63a17d6 3771 SSL_R_WRONG_SIGNATURE_TYPE);
0972bc5c
DSH		 3772 return 0;
3773 }
3774 }
3775 } else {
7f6b466b 3776 if ((lu = tls1_get_legacy_sigalg(s, -1)) == NULL) {
f63a17d6 3777 if (!fatalerrs)
717a265a 3778 return 1;
c48ffbcc 3779 SSLfatal(s, SSL_AD_INTERNAL_ERROR,
a70535f8 3780 SSL_R_NO_SUITABLE_SIGNATURE_ALGORITHM);
0972bc5c
DSH		 3781 return 0;
3782 }
3783 }
93a77f9e 3784 }
b46867d7
DSH		 3785 if (sig_idx == -1)
3786 sig_idx = lu->sig_idx;
555cbb32
TS		 3787 s->s3.tmp.cert = &s->cert->pkeys[sig_idx];
3788 s->cert->key = s->s3.tmp.cert;
3789 s->s3.tmp.sigalg = lu;
93a77f9e
DSH		 3790 return 1;
3791}
cf72c757
F		 3792
3793int SSL_CTX_set_tlsext_max_fragment_length(SSL_CTX *ctx, uint8_t mode)
3794{
3795 if (mode != TLSEXT_max_fragment_length_DISABLED
3796 && !IS_MAX_FRAGMENT_LENGTH_EXT_VALID(mode)) {
6849b73c 3797 ERR_raise(ERR_LIB_SSL, SSL_R_SSL3_EXT_INVALID_MAX_FRAGMENT_LENGTH);
cf72c757
F		 3798 return 0;
3799 }
3800
3801 ctx->ext.max_fragment_len_mode = mode;
3802 return 1;
3803}
3804
3805int SSL_set_tlsext_max_fragment_length(SSL *ssl, uint8_t mode)
3806{
38b051a1
TM		 3807 SSL_CONNECTION *sc = SSL_CONNECTION_FROM_SSL(ssl);
3808
3809 if (sc == NULL)
3810 return 0;
3811
cf72c757
F		 3812 if (mode != TLSEXT_max_fragment_length_DISABLED
3813 && !IS_MAX_FRAGMENT_LENGTH_EXT_VALID(mode)) {
6849b73c 3814 ERR_raise(ERR_LIB_SSL, SSL_R_SSL3_EXT_INVALID_MAX_FRAGMENT_LENGTH);
cf72c757
F		 3815 return 0;
3816 }
3817
38b051a1 3818 sc->ext.max_fragment_len_mode = mode;
cf72c757
F		 3819 return 1;
3820}
3821
3822uint8_t SSL_SESSION_get_max_fragment_length(const SSL_SESSION *session)
3823{
3824 return session->ext.max_fragment_len_mode;
3825}
a76ce286
P		 3826
3827/*
3828 * Helper functions for HMAC access with legacy support included.
3829 */
3830SSL_HMAC *ssl_hmac_new(const SSL_CTX *ctx)
3831{
3832 SSL_HMAC *ret = OPENSSL_zalloc(sizeof(*ret));
3833 EVP_MAC *mac = NULL;
3834
3835 if (ret == NULL)
3836 return NULL;
3837#ifndef OPENSSL_NO_DEPRECATED_3_0
3838 if (ctx->ext.ticket_key_evp_cb == NULL
3839 && ctx->ext.ticket_key_cb != NULL) {
301fcb28 3840 if (!ssl_hmac_old_new(ret))
a76ce286
P		 3841 goto err;
3842 return ret;
3843 }
3844#endif
7f80980f 3845 mac = EVP_MAC_fetch(ctx->libctx, "HMAC", ctx->propq);
865adf97 3846 if (mac == NULL || (ret->ctx = EVP_MAC_CTX_new(mac)) == NULL)
a76ce286
P		 3847 goto err;
3848 EVP_MAC_free(mac);
3849 return ret;
3850 err:
865adf97 3851 EVP_MAC_CTX_free(ret->ctx);
a76ce286
P		 3852 EVP_MAC_free(mac);
3853 OPENSSL_free(ret);
3854 return NULL;
3855}
3856
3857void ssl_hmac_free(SSL_HMAC *ctx)
3858{
3859 if (ctx != NULL) {
865adf97 3860 EVP_MAC_CTX_free(ctx->ctx);
a76ce286 3861#ifndef OPENSSL_NO_DEPRECATED_3_0
301fcb28 3862 ssl_hmac_old_free(ctx);
a76ce286
P		 3863#endif
3864 OPENSSL_free(ctx);
3865 }
3866}
3867
a76ce286
P		 3868EVP_MAC_CTX *ssl_hmac_get0_EVP_MAC_CTX(SSL_HMAC *ctx)
3869{
3870 return ctx->ctx;
3871}
3872
3873int ssl_hmac_init(SSL_HMAC *ctx, void *key, size_t len, char *md)
3874{
0edb8194 3875 OSSL_PARAM params[2], *p = params;
a76ce286
P		 3876
3877 if (ctx->ctx != NULL) {
3878 *p++ = OSSL_PARAM_construct_utf8_string(OSSL_MAC_PARAM_DIGEST, md, 0);
a76ce286 3879 *p = OSSL_PARAM_construct_end();
0edb8194 3880 if (EVP_MAC_init(ctx->ctx, key, len, params))
a76ce286
P		 3881 return 1;
3882 }
3883#ifndef OPENSSL_NO_DEPRECATED_3_0
3884 if (ctx->old_ctx != NULL)
301fcb28 3885 return ssl_hmac_old_init(ctx, key, len, md);
a76ce286
P		 3886#endif
3887 return 0;
3888}
3889
3890int ssl_hmac_update(SSL_HMAC *ctx, const unsigned char *data, size_t len)
3891{
3892 if (ctx->ctx != NULL)
3893 return EVP_MAC_update(ctx->ctx, data, len);
3894#ifndef OPENSSL_NO_DEPRECATED_3_0
3895 if (ctx->old_ctx != NULL)
301fcb28 3896 return ssl_hmac_old_update(ctx, data, len);
a76ce286
P		 3897#endif
3898 return 0;
3899}
3900
3901int ssl_hmac_final(SSL_HMAC *ctx, unsigned char *md, size_t *len,
3902 size_t max_size)
3903{
3904 if (ctx->ctx != NULL)
3905 return EVP_MAC_final(ctx->ctx, md, len, max_size);
3906#ifndef OPENSSL_NO_DEPRECATED_3_0
301fcb28
MC		 3907 if (ctx->old_ctx != NULL)
3908 return ssl_hmac_old_final(ctx, md, len);
a76ce286
P		 3909#endif
3910 return 0;
3911}
3912
3913size_t ssl_hmac_size(const SSL_HMAC *ctx)
3914{
3915 if (ctx->ctx != NULL)
90a2576b 3916 return EVP_MAC_CTX_get_mac_size(ctx->ctx);
a76ce286
P		 3917#ifndef OPENSSL_NO_DEPRECATED_3_0
3918 if (ctx->old_ctx != NULL)
301fcb28 3919 return ssl_hmac_old_size(ctx);
a76ce286
P		 3920#endif
3921 return 0;
3922}
3923
d8975dec
RL		 3924int ssl_get_EC_curve_nid(const EVP_PKEY *pkey)
3925{
3926 char gname[OSSL_MAX_NAME_SIZE];
3927
3928 if (EVP_PKEY_get_group_name(pkey, gname, sizeof(gname), NULL) > 0)
3929 return OBJ_txt2nid(gname);
3930
3931 return NID_undef;
3932}
d5530efa
TM		 3933
3934__owur int tls13_set_encoded_pub_key(EVP_PKEY *pkey,
3935 const unsigned char *enckey,
3936 size_t enckeylen)
3937{
3938 if (EVP_PKEY_is_a(pkey, "DH")) {
3939 int bits = EVP_PKEY_get_bits(pkey);
3940
3941 if (bits <= 0 || enckeylen != (size_t)bits / 8)
3942 /* the encoded key must be padded to the length of the p */
3943 return 0;
3944 } else if (EVP_PKEY_is_a(pkey, "EC")) {
3945 if (enckeylen < 3 /* point format and at least 1 byte for x and y */
3946 || enckey[0] != 0x04)
3947 return 0;
3948 }
3949
3950 return EVP_PKEY_set1_encoded_public_key(pkey, enckey, enckeylen);
3951}
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