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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 | |
5235ef44 | 29 | static const SIGALG_LOOKUP *find_sig_alg(SSL *s, X509 *x, EVP_PKEY *pkey); |
b0031e5d | 30 | static int tls12_sigalg_allowed(const SSL *s, int op, const SIGALG_LOOKUP *lu); |
5235ef44 | 31 | |
0f113f3e MC |
32 | SSL3_ENC_METHOD const TLSv1_enc_data = { |
33 | tls1_enc, | |
34 | tls1_mac, | |
35 | tls1_setup_key_block, | |
36 | tls1_generate_master_secret, | |
37 | tls1_change_cipher_state, | |
38 | tls1_final_finish_mac, | |
0f113f3e MC |
39 | TLS_MD_CLIENT_FINISH_CONST, TLS_MD_CLIENT_FINISH_CONST_SIZE, |
40 | TLS_MD_SERVER_FINISH_CONST, TLS_MD_SERVER_FINISH_CONST_SIZE, | |
41 | tls1_alert_code, | |
42 | tls1_export_keying_material, | |
43 | 0, | |
a29fa98c | 44 | ssl3_set_handshake_header, |
2c7b4dbc | 45 | tls_close_construct_packet, |
0f113f3e MC |
46 | ssl3_handshake_write |
47 | }; | |
48 | ||
49 | SSL3_ENC_METHOD const TLSv1_1_enc_data = { | |
50 | tls1_enc, | |
51 | tls1_mac, | |
52 | tls1_setup_key_block, | |
53 | tls1_generate_master_secret, | |
54 | tls1_change_cipher_state, | |
55 | tls1_final_finish_mac, | |
0f113f3e MC |
56 | TLS_MD_CLIENT_FINISH_CONST, TLS_MD_CLIENT_FINISH_CONST_SIZE, |
57 | TLS_MD_SERVER_FINISH_CONST, TLS_MD_SERVER_FINISH_CONST_SIZE, | |
58 | tls1_alert_code, | |
59 | tls1_export_keying_material, | |
60 | SSL_ENC_FLAG_EXPLICIT_IV, | |
a29fa98c | 61 | ssl3_set_handshake_header, |
2c7b4dbc | 62 | tls_close_construct_packet, |
0f113f3e MC |
63 | ssl3_handshake_write |
64 | }; | |
65 | ||
66 | SSL3_ENC_METHOD const TLSv1_2_enc_data = { | |
67 | tls1_enc, | |
68 | tls1_mac, | |
69 | tls1_setup_key_block, | |
70 | tls1_generate_master_secret, | |
71 | tls1_change_cipher_state, | |
72 | tls1_final_finish_mac, | |
0f113f3e MC |
73 | TLS_MD_CLIENT_FINISH_CONST, TLS_MD_CLIENT_FINISH_CONST_SIZE, |
74 | TLS_MD_SERVER_FINISH_CONST, TLS_MD_SERVER_FINISH_CONST_SIZE, | |
75 | tls1_alert_code, | |
76 | tls1_export_keying_material, | |
77 | SSL_ENC_FLAG_EXPLICIT_IV | SSL_ENC_FLAG_SIGALGS | SSL_ENC_FLAG_SHA256_PRF | |
78 | | SSL_ENC_FLAG_TLS1_2_CIPHERS, | |
a29fa98c | 79 | ssl3_set_handshake_header, |
2c7b4dbc | 80 | tls_close_construct_packet, |
0f113f3e MC |
81 | ssl3_handshake_write |
82 | }; | |
58964a49 | 83 | |
582a17d6 | 84 | SSL3_ENC_METHOD const TLSv1_3_enc_data = { |
bebc0c7d | 85 | tls13_enc, |
582a17d6 | 86 | tls1_mac, |
92760c21 MC |
87 | tls13_setup_key_block, |
88 | tls13_generate_master_secret, | |
89 | tls13_change_cipher_state, | |
90 | tls13_final_finish_mac, | |
582a17d6 MC |
91 | TLS_MD_CLIENT_FINISH_CONST, TLS_MD_CLIENT_FINISH_CONST_SIZE, |
92 | TLS_MD_SERVER_FINISH_CONST, TLS_MD_SERVER_FINISH_CONST_SIZE, | |
04904312 | 93 | tls13_alert_code, |
0ca8d1ec | 94 | tls13_export_keying_material, |
bebc0c7d | 95 | SSL_ENC_FLAG_SIGALGS | SSL_ENC_FLAG_SHA256_PRF, |
582a17d6 MC |
96 | ssl3_set_handshake_header, |
97 | tls_close_construct_packet, | |
98 | ssl3_handshake_write | |
99 | }; | |
100 | ||
f3b656b2 | 101 | long tls1_default_timeout(void) |
0f113f3e MC |
102 | { |
103 | /* | |
104 | * 2 hours, the 24 hours mentioned in the TLSv1 spec is way too long for | |
105 | * http, the cache would over fill | |
106 | */ | |
107 | return (60 * 60 * 2); | |
108 | } | |
58964a49 | 109 | |
6b691a5c | 110 | int tls1_new(SSL *s) |
0f113f3e MC |
111 | { |
112 | if (!ssl3_new(s)) | |
b77f3ed1 MC |
113 | return 0; |
114 | if (!s->method->ssl_clear(s)) | |
115 | return 0; | |
116 | ||
117 | return 1; | |
0f113f3e | 118 | } |
58964a49 | 119 | |
6b691a5c | 120 | void tls1_free(SSL *s) |
0f113f3e | 121 | { |
aff8c126 | 122 | OPENSSL_free(s->ext.session_ticket); |
0f113f3e MC |
123 | ssl3_free(s); |
124 | } | |
58964a49 | 125 | |
b77f3ed1 | 126 | int tls1_clear(SSL *s) |
0f113f3e | 127 | { |
b77f3ed1 MC |
128 | if (!ssl3_clear(s)) |
129 | return 0; | |
130 | ||
4fa52141 | 131 | if (s->method->version == TLS_ANY_VERSION) |
5c587fb6 | 132 | s->version = TLS_MAX_VERSION_INTERNAL; |
4fa52141 VD |
133 | else |
134 | s->version = s->method->version; | |
b77f3ed1 MC |
135 | |
136 | return 1; | |
0f113f3e | 137 | } |
58964a49 | 138 | |
9d2d857f MC |
139 | /* Legacy NID to group_id mapping. Only works for groups we know about */ |
140 | static struct { | |
141 | int nid; | |
142 | uint16_t group_id; | |
143 | } nid_to_group[] = { | |
48e971dd MC |
144 | {NID_sect163k1, OSSL_TLS_GROUP_ID_sect163k1}, |
145 | {NID_sect163r1, OSSL_TLS_GROUP_ID_sect163r1}, | |
146 | {NID_sect163r2, OSSL_TLS_GROUP_ID_sect163r2}, | |
147 | {NID_sect193r1, OSSL_TLS_GROUP_ID_sect193r1}, | |
148 | {NID_sect193r2, OSSL_TLS_GROUP_ID_sect193r2}, | |
149 | {NID_sect233k1, OSSL_TLS_GROUP_ID_sect233k1}, | |
150 | {NID_sect233r1, OSSL_TLS_GROUP_ID_sect233r1}, | |
151 | {NID_sect239k1, OSSL_TLS_GROUP_ID_sect239k1}, | |
152 | {NID_sect283k1, OSSL_TLS_GROUP_ID_sect283k1}, | |
153 | {NID_sect283r1, OSSL_TLS_GROUP_ID_sect283r1}, | |
154 | {NID_sect409k1, OSSL_TLS_GROUP_ID_sect409k1}, | |
155 | {NID_sect409r1, OSSL_TLS_GROUP_ID_sect409r1}, | |
156 | {NID_sect571k1, OSSL_TLS_GROUP_ID_sect571k1}, | |
157 | {NID_sect571r1, OSSL_TLS_GROUP_ID_sect571r1}, | |
158 | {NID_secp160k1, OSSL_TLS_GROUP_ID_secp160k1}, | |
159 | {NID_secp160r1, OSSL_TLS_GROUP_ID_secp160r1}, | |
160 | {NID_secp160r2, OSSL_TLS_GROUP_ID_secp160r2}, | |
161 | {NID_secp192k1, OSSL_TLS_GROUP_ID_secp192k1}, | |
162 | {NID_X9_62_prime192v1, OSSL_TLS_GROUP_ID_secp192r1}, | |
163 | {NID_secp224k1, OSSL_TLS_GROUP_ID_secp224k1}, | |
164 | {NID_secp224r1, OSSL_TLS_GROUP_ID_secp224r1}, | |
165 | {NID_secp256k1, OSSL_TLS_GROUP_ID_secp256k1}, | |
166 | {NID_X9_62_prime256v1, OSSL_TLS_GROUP_ID_secp256r1}, | |
167 | {NID_secp384r1, OSSL_TLS_GROUP_ID_secp384r1}, | |
168 | {NID_secp521r1, OSSL_TLS_GROUP_ID_secp521r1}, | |
169 | {NID_brainpoolP256r1, OSSL_TLS_GROUP_ID_brainpoolP256r1}, | |
170 | {NID_brainpoolP384r1, OSSL_TLS_GROUP_ID_brainpoolP384r1}, | |
171 | {NID_brainpoolP512r1, OSSL_TLS_GROUP_ID_brainpoolP512r1}, | |
172 | {EVP_PKEY_X25519, OSSL_TLS_GROUP_ID_x25519}, | |
173 | {EVP_PKEY_X448, OSSL_TLS_GROUP_ID_x448}, | |
0a10825a BE |
174 | {NID_id_tc26_gost_3410_2012_256_paramSetA, OSSL_TLS_GROUP_ID_gc256A}, |
175 | {NID_id_tc26_gost_3410_2012_256_paramSetB, OSSL_TLS_GROUP_ID_gc256B}, | |
176 | {NID_id_tc26_gost_3410_2012_256_paramSetC, OSSL_TLS_GROUP_ID_gc256C}, | |
177 | {NID_id_tc26_gost_3410_2012_256_paramSetD, OSSL_TLS_GROUP_ID_gc256D}, | |
178 | {NID_id_tc26_gost_3410_2012_512_paramSetA, OSSL_TLS_GROUP_ID_gc512A}, | |
179 | {NID_id_tc26_gost_3410_2012_512_paramSetB, OSSL_TLS_GROUP_ID_gc512B}, | |
180 | {NID_id_tc26_gost_3410_2012_512_paramSetC, OSSL_TLS_GROUP_ID_gc512C}, | |
48e971dd MC |
181 | {NID_ffdhe2048, OSSL_TLS_GROUP_ID_ffdhe2048}, |
182 | {NID_ffdhe3072, OSSL_TLS_GROUP_ID_ffdhe3072}, | |
183 | {NID_ffdhe4096, OSSL_TLS_GROUP_ID_ffdhe4096}, | |
184 | {NID_ffdhe6144, OSSL_TLS_GROUP_ID_ffdhe6144}, | |
185 | {NID_ffdhe8192, OSSL_TLS_GROUP_ID_ffdhe8192} | |
0f113f3e MC |
186 | }; |
187 | ||
188 | static const unsigned char ecformats_default[] = { | |
189 | TLSEXT_ECPOINTFORMAT_uncompressed, | |
190 | TLSEXT_ECPOINTFORMAT_ansiX962_compressed_prime, | |
191 | TLSEXT_ECPOINTFORMAT_ansiX962_compressed_char2 | |
192 | }; | |
193 | ||
fe6ef247 | 194 | /* The default curves */ |
9aaecbfc | 195 | static const uint16_t supported_groups_default[] = { |
0a10825a BE |
196 | OSSL_TLS_GROUP_ID_x25519, /* X25519 (29) */ |
197 | OSSL_TLS_GROUP_ID_secp256r1, /* secp256r1 (23) */ | |
198 | OSSL_TLS_GROUP_ID_x448, /* X448 (30) */ | |
199 | OSSL_TLS_GROUP_ID_secp521r1, /* secp521r1 (25) */ | |
200 | OSSL_TLS_GROUP_ID_secp384r1, /* secp384r1 (24) */ | |
201 | OSSL_TLS_GROUP_ID_gc256A, /* GC256A (34) */ | |
202 | OSSL_TLS_GROUP_ID_gc256B, /* GC256B (35) */ | |
203 | OSSL_TLS_GROUP_ID_gc256C, /* GC256C (36) */ | |
204 | OSSL_TLS_GROUP_ID_gc256D, /* GC256D (37) */ | |
205 | OSSL_TLS_GROUP_ID_gc512A, /* GC512A (38) */ | |
206 | OSSL_TLS_GROUP_ID_gc512B, /* GC512B (39) */ | |
207 | OSSL_TLS_GROUP_ID_gc512C, /* GC512C (40) */ | |
208 | OSSL_TLS_GROUP_ID_ffdhe2048, /* ffdhe2048 (0x100) */ | |
209 | OSSL_TLS_GROUP_ID_ffdhe3072, /* ffdhe3072 (0x101) */ | |
210 | OSSL_TLS_GROUP_ID_ffdhe4096, /* ffdhe4096 (0x102) */ | |
211 | OSSL_TLS_GROUP_ID_ffdhe6144, /* ffdhe6144 (0x103) */ | |
212 | OSSL_TLS_GROUP_ID_ffdhe8192, /* ffdhe8192 (0x104) */ | |
de57d237 EK |
213 | }; |
214 | ||
9e84a42d | 215 | static const uint16_t suiteb_curves[] = { |
0a10825a BE |
216 | OSSL_TLS_GROUP_ID_secp256r1, |
217 | OSSL_TLS_GROUP_ID_secp384r1, | |
0f113f3e | 218 | }; |
2ea80354 | 219 | |
9d2d857f MC |
220 | struct provider_group_data_st { |
221 | SSL_CTX *ctx; | |
222 | OSSL_PROVIDER *provider; | |
223 | }; | |
224 | ||
225 | #define TLS_GROUP_LIST_MALLOC_BLOCK_SIZE 10 | |
226 | static OSSL_CALLBACK add_provider_groups; | |
227 | static int add_provider_groups(const OSSL_PARAM params[], void *data) | |
228 | { | |
229 | struct provider_group_data_st *pgd = data; | |
230 | SSL_CTX *ctx = pgd->ctx; | |
231 | OSSL_PROVIDER *provider = pgd->provider; | |
232 | const OSSL_PARAM *p; | |
233 | TLS_GROUP_INFO *ginf = NULL; | |
234 | EVP_KEYMGMT *keymgmt; | |
235 | unsigned int gid; | |
c1a74f59 | 236 | unsigned int is_kem = 0; |
9d2d857f MC |
237 | int ret = 0; |
238 | ||
239 | if (ctx->group_list_max_len == ctx->group_list_len) { | |
240 | TLS_GROUP_INFO *tmp = NULL; | |
241 | ||
242 | if (ctx->group_list_max_len == 0) | |
243 | tmp = OPENSSL_malloc(sizeof(TLS_GROUP_INFO) | |
244 | * TLS_GROUP_LIST_MALLOC_BLOCK_SIZE); | |
245 | else | |
246 | tmp = OPENSSL_realloc(ctx->group_list, | |
247 | (ctx->group_list_max_len | |
248 | + TLS_GROUP_LIST_MALLOC_BLOCK_SIZE) | |
249 | * sizeof(TLS_GROUP_INFO)); | |
250 | if (tmp == NULL) { | |
6849b73c | 251 | ERR_raise(ERR_LIB_SSL, ERR_R_MALLOC_FAILURE); |
9d2d857f MC |
252 | return 0; |
253 | } | |
254 | ctx->group_list = tmp; | |
255 | memset(tmp + ctx->group_list_max_len, | |
256 | 0, | |
257 | sizeof(TLS_GROUP_INFO) * TLS_GROUP_LIST_MALLOC_BLOCK_SIZE); | |
258 | ctx->group_list_max_len += TLS_GROUP_LIST_MALLOC_BLOCK_SIZE; | |
259 | } | |
260 | ||
261 | ginf = &ctx->group_list[ctx->group_list_len]; | |
262 | ||
263 | p = OSSL_PARAM_locate_const(params, OSSL_CAPABILITY_TLS_GROUP_NAME); | |
264 | if (p == NULL || p->data_type != OSSL_PARAM_UTF8_STRING) { | |
6849b73c | 265 | ERR_raise(ERR_LIB_SSL, ERR_R_PASSED_INVALID_ARGUMENT); |
9d2d857f MC |
266 | goto err; |
267 | } | |
268 | ginf->tlsname = OPENSSL_strdup(p->data); | |
269 | if (ginf->tlsname == NULL) { | |
6849b73c | 270 | ERR_raise(ERR_LIB_SSL, ERR_R_MALLOC_FAILURE); |
9d2d857f MC |
271 | goto err; |
272 | } | |
273 | ||
274 | p = OSSL_PARAM_locate_const(params, OSSL_CAPABILITY_TLS_GROUP_NAME_INTERNAL); | |
275 | if (p == NULL || p->data_type != OSSL_PARAM_UTF8_STRING) { | |
6849b73c | 276 | ERR_raise(ERR_LIB_SSL, ERR_R_PASSED_INVALID_ARGUMENT); |
9d2d857f MC |
277 | goto err; |
278 | } | |
279 | ginf->realname = OPENSSL_strdup(p->data); | |
280 | if (ginf->realname == NULL) { | |
6849b73c | 281 | ERR_raise(ERR_LIB_SSL, ERR_R_MALLOC_FAILURE); |
9d2d857f MC |
282 | goto err; |
283 | } | |
284 | ||
285 | p = OSSL_PARAM_locate_const(params, OSSL_CAPABILITY_TLS_GROUP_ID); | |
286 | if (p == NULL || !OSSL_PARAM_get_uint(p, &gid) || gid > UINT16_MAX) { | |
6849b73c | 287 | ERR_raise(ERR_LIB_SSL, ERR_R_PASSED_INVALID_ARGUMENT); |
9d2d857f MC |
288 | goto err; |
289 | } | |
290 | ginf->group_id = (uint16_t)gid; | |
291 | ||
292 | p = OSSL_PARAM_locate_const(params, OSSL_CAPABILITY_TLS_GROUP_ALG); | |
293 | if (p == NULL || p->data_type != OSSL_PARAM_UTF8_STRING) { | |
6849b73c | 294 | ERR_raise(ERR_LIB_SSL, ERR_R_PASSED_INVALID_ARGUMENT); |
9d2d857f MC |
295 | goto err; |
296 | } | |
297 | ginf->algorithm = OPENSSL_strdup(p->data); | |
298 | if (ginf->algorithm == NULL) { | |
6849b73c | 299 | ERR_raise(ERR_LIB_SSL, ERR_R_MALLOC_FAILURE); |
9d2d857f MC |
300 | goto err; |
301 | } | |
302 | ||
303 | p = OSSL_PARAM_locate_const(params, OSSL_CAPABILITY_TLS_GROUP_SECURITY_BITS); | |
304 | if (p == NULL || !OSSL_PARAM_get_uint(p, &ginf->secbits)) { | |
6849b73c | 305 | ERR_raise(ERR_LIB_SSL, ERR_R_PASSED_INVALID_ARGUMENT); |
9d2d857f MC |
306 | goto err; |
307 | } | |
308 | ||
c1a74f59 NT |
309 | p = OSSL_PARAM_locate_const(params, OSSL_CAPABILITY_TLS_GROUP_IS_KEM); |
310 | if (p != NULL && (!OSSL_PARAM_get_uint(p, &is_kem) || is_kem > 1)) { | |
6849b73c | 311 | ERR_raise(ERR_LIB_SSL, ERR_R_PASSED_INVALID_ARGUMENT); |
c1a74f59 NT |
312 | goto err; |
313 | } | |
314 | ginf->is_kem = 1 & is_kem; | |
315 | ||
9d2d857f MC |
316 | p = OSSL_PARAM_locate_const(params, OSSL_CAPABILITY_TLS_GROUP_MIN_TLS); |
317 | if (p == NULL || !OSSL_PARAM_get_int(p, &ginf->mintls)) { | |
6849b73c | 318 | ERR_raise(ERR_LIB_SSL, ERR_R_PASSED_INVALID_ARGUMENT); |
9d2d857f MC |
319 | goto err; |
320 | } | |
321 | ||
322 | p = OSSL_PARAM_locate_const(params, OSSL_CAPABILITY_TLS_GROUP_MAX_TLS); | |
323 | if (p == NULL || !OSSL_PARAM_get_int(p, &ginf->maxtls)) { | |
6849b73c | 324 | ERR_raise(ERR_LIB_SSL, ERR_R_PASSED_INVALID_ARGUMENT); |
90a74d8c | 325 | goto err; |
9d2d857f MC |
326 | } |
327 | ||
328 | p = OSSL_PARAM_locate_const(params, OSSL_CAPABILITY_TLS_GROUP_MIN_DTLS); | |
329 | if (p == NULL || !OSSL_PARAM_get_int(p, &ginf->mindtls)) { | |
6849b73c | 330 | ERR_raise(ERR_LIB_SSL, ERR_R_PASSED_INVALID_ARGUMENT); |
9d2d857f MC |
331 | goto err; |
332 | } | |
333 | ||
334 | p = OSSL_PARAM_locate_const(params, OSSL_CAPABILITY_TLS_GROUP_MAX_DTLS); | |
335 | if (p == NULL || !OSSL_PARAM_get_int(p, &ginf->maxdtls)) { | |
6849b73c | 336 | ERR_raise(ERR_LIB_SSL, ERR_R_PASSED_INVALID_ARGUMENT); |
9d2d857f MC |
337 | goto err; |
338 | } | |
339 | /* | |
340 | * Now check that the algorithm is actually usable for our property query | |
341 | * string. Regardless of the result we still return success because we have | |
342 | * successfully processed this group, even though we may decide not to use | |
343 | * it. | |
344 | */ | |
345 | ret = 1; | |
346 | keymgmt = EVP_KEYMGMT_fetch(ctx->libctx, ginf->algorithm, ctx->propq); | |
347 | if (keymgmt != NULL) { | |
348 | /* | |
349 | * We have successfully fetched the algorithm - however if the provider | |
350 | * doesn't match this one then we ignore it. | |
351 | * | |
352 | * Note: We're cheating a little here. Technically if the same algorithm | |
353 | * is available from more than one provider then it is undefined which | |
354 | * implementation you will get back. Theoretically this could be | |
355 | * different every time...we assume here that you'll always get the | |
356 | * same one back if you repeat the exact same fetch. Is this a reasonable | |
357 | * assumption to make (in which case perhaps we should document this | |
358 | * behaviour)? | |
359 | */ | |
ed576acd | 360 | if (EVP_KEYMGMT_get0_provider(keymgmt) == provider) { |
9d2d857f MC |
361 | /* We have a match - so we will use this group */ |
362 | ctx->group_list_len++; | |
363 | ginf = NULL; | |
364 | } | |
365 | EVP_KEYMGMT_free(keymgmt); | |
366 | } | |
367 | err: | |
368 | if (ginf != NULL) { | |
369 | OPENSSL_free(ginf->tlsname); | |
370 | OPENSSL_free(ginf->realname); | |
371 | OPENSSL_free(ginf->algorithm); | |
372 | ginf->tlsname = ginf->realname = NULL; | |
373 | } | |
374 | return ret; | |
375 | } | |
376 | ||
377 | static int discover_provider_groups(OSSL_PROVIDER *provider, void *vctx) | |
378 | { | |
379 | struct provider_group_data_st pgd; | |
380 | ||
381 | pgd.ctx = vctx; | |
382 | pgd.provider = provider; | |
383 | return OSSL_PROVIDER_get_capabilities(provider, "TLS-GROUP", | |
384 | add_provider_groups, &pgd); | |
385 | } | |
386 | ||
387 | int ssl_load_groups(SSL_CTX *ctx) | |
388 | { | |
ddf8f1ce | 389 | size_t i, j, num_deflt_grps = 0; |
8b1db5d3 | 390 | uint16_t tmp_supp_groups[OSSL_NELEM(supported_groups_default)]; |
ddf8f1ce MC |
391 | |
392 | if (!OSSL_PROVIDER_do_all(ctx->libctx, discover_provider_groups, ctx)) | |
393 | return 0; | |
394 | ||
8b1db5d3 | 395 | for (i = 0; i < OSSL_NELEM(supported_groups_default); i++) { |
ddf8f1ce | 396 | for (j = 0; j < ctx->group_list_len; j++) { |
8b1db5d3 | 397 | if (ctx->group_list[j].group_id == supported_groups_default[i]) { |
ddf8f1ce | 398 | tmp_supp_groups[num_deflt_grps++] = ctx->group_list[j].group_id; |
8b1db5d3 MC |
399 | break; |
400 | } | |
ddf8f1ce MC |
401 | } |
402 | } | |
403 | ||
404 | if (num_deflt_grps == 0) | |
405 | return 1; | |
406 | ||
407 | ctx->ext.supported_groups_default | |
408 | = OPENSSL_malloc(sizeof(uint16_t) * num_deflt_grps); | |
409 | ||
410 | if (ctx->ext.supported_groups_default == NULL) { | |
411 | ERR_raise(ERR_LIB_SSL, ERR_R_MALLOC_FAILURE); | |
412 | return 0; | |
413 | } | |
414 | ||
8b1db5d3 MC |
415 | memcpy(ctx->ext.supported_groups_default, |
416 | tmp_supp_groups, | |
417 | num_deflt_grps * sizeof(tmp_supp_groups[0])); | |
ddf8f1ce MC |
418 | ctx->ext.supported_groups_default_len = num_deflt_grps; |
419 | ||
420 | return 1; | |
9d2d857f MC |
421 | } |
422 | ||
260009d8 MC |
423 | static uint16_t tls1_group_name2id(SSL_CTX *ctx, const char *name) |
424 | { | |
425 | size_t i; | |
260009d8 MC |
426 | |
427 | for (i = 0; i < ctx->group_list_len; i++) { | |
428 | if (strcmp(ctx->group_list[i].tlsname, name) == 0 | |
306b8e7e | 429 | || strcmp(ctx->group_list[i].realname, name) == 0) |
260009d8 MC |
430 | return ctx->group_list[i].group_id; |
431 | } | |
432 | ||
433 | return 0; | |
434 | } | |
435 | ||
0a10825a BE |
436 | uint16_t ssl_group_id_internal_to_tls13(uint16_t curve_id) |
437 | { | |
438 | switch(curve_id) { | |
439 | case OSSL_TLS_GROUP_ID_brainpoolP256r1: | |
440 | return OSSL_TLS_GROUP_ID_brainpoolP256r1_tls13; | |
441 | case OSSL_TLS_GROUP_ID_brainpoolP384r1: | |
442 | return OSSL_TLS_GROUP_ID_brainpoolP384r1_tls13; | |
443 | case OSSL_TLS_GROUP_ID_brainpoolP512r1: | |
444 | return OSSL_TLS_GROUP_ID_brainpoolP512r1_tls13; | |
445 | case OSSL_TLS_GROUP_ID_brainpoolP256r1_tls13: | |
446 | case OSSL_TLS_GROUP_ID_brainpoolP384r1_tls13: | |
447 | case OSSL_TLS_GROUP_ID_brainpoolP512r1_tls13: | |
448 | return 0; | |
449 | default: | |
450 | return curve_id; | |
451 | } | |
452 | } | |
453 | ||
454 | uint16_t ssl_group_id_tls13_to_internal(uint16_t curve_id) | |
455 | { | |
456 | switch(curve_id) { | |
457 | case OSSL_TLS_GROUP_ID_brainpoolP256r1: | |
458 | case OSSL_TLS_GROUP_ID_brainpoolP384r1: | |
459 | case OSSL_TLS_GROUP_ID_brainpoolP512r1: | |
460 | return 0; | |
461 | case OSSL_TLS_GROUP_ID_brainpoolP256r1_tls13: | |
462 | return OSSL_TLS_GROUP_ID_brainpoolP256r1; | |
463 | case OSSL_TLS_GROUP_ID_brainpoolP384r1_tls13: | |
464 | return OSSL_TLS_GROUP_ID_brainpoolP384r1; | |
465 | case OSSL_TLS_GROUP_ID_brainpoolP512r1_tls13: | |
466 | return OSSL_TLS_GROUP_ID_brainpoolP512r1; | |
467 | default: | |
468 | return curve_id; | |
469 | } | |
470 | } | |
471 | ||
9d2d857f | 472 | const TLS_GROUP_INFO *tls1_group_id_lookup(SSL_CTX *ctx, uint16_t group_id) |
0f113f3e | 473 | { |
9aaecbfc | 474 | size_t i; |
475 | ||
9d2d857f MC |
476 | for (i = 0; i < ctx->group_list_len; i++) { |
477 | if (ctx->group_list[i].group_id == group_id) | |
478 | return &ctx->group_list[i]; | |
9aaecbfc | 479 | } |
9d2d857f | 480 | |
9aaecbfc | 481 | return NULL; |
0f113f3e | 482 | } |
525de5d3 | 483 | |
260009d8 | 484 | int tls1_group_id2nid(uint16_t group_id, int include_unknown) |
84d4b9e3 | 485 | { |
9d2d857f | 486 | size_t i; |
84d4b9e3 | 487 | |
260009d8 MC |
488 | if (group_id == 0) |
489 | return NID_undef; | |
490 | ||
9d2d857f MC |
491 | /* |
492 | * Return well known Group NIDs - for backwards compatibility. This won't | |
493 | * work for groups we don't know about. | |
494 | */ | |
495 | for (i = 0; i < OSSL_NELEM(nid_to_group); i++) | |
496 | { | |
497 | if (nid_to_group[i].group_id == group_id) | |
498 | return nid_to_group[i].nid; | |
499 | } | |
260009d8 MC |
500 | if (!include_unknown) |
501 | return NID_undef; | |
502 | return TLSEXT_nid_unknown | (int)group_id; | |
84d4b9e3 | 503 | } |
504 | ||
becbacd7 | 505 | uint16_t tls1_nid2group_id(int nid) |
0f113f3e | 506 | { |
2fa2d15a | 507 | size_t i; |
9aaecbfc | 508 | |
9d2d857f MC |
509 | /* |
510 | * Return well known Group ids - for backwards compatibility. This won't | |
511 | * work for groups we don't know about. | |
512 | */ | |
513 | for (i = 0; i < OSSL_NELEM(nid_to_group); i++) | |
514 | { | |
515 | if (nid_to_group[i].nid == nid) | |
516 | return nid_to_group[i].group_id; | |
0f113f3e | 517 | } |
9d2d857f | 518 | |
2fa2d15a | 519 | return 0; |
0f113f3e MC |
520 | } |
521 | ||
740580c2 | 522 | /* |
ff6d20a6 DSH |
523 | * Set *pgroups to the supported groups list and *pgroupslen to |
524 | * the number of groups supported. | |
fd2b65ce | 525 | */ |
ff6d20a6 DSH |
526 | void tls1_get_supported_groups(SSL *s, const uint16_t **pgroups, |
527 | size_t *pgroupslen) | |
0f113f3e | 528 | { |
34e5292c DSH |
529 | /* For Suite B mode only include P-256, P-384 */ |
530 | switch (tls1_suiteb(s)) { | |
531 | case SSL_CERT_FLAG_SUITEB_128_LOS: | |
ff6d20a6 DSH |
532 | *pgroups = suiteb_curves; |
533 | *pgroupslen = OSSL_NELEM(suiteb_curves); | |
34e5292c DSH |
534 | break; |
535 | ||
536 | case SSL_CERT_FLAG_SUITEB_128_LOS_ONLY: | |
ff6d20a6 DSH |
537 | *pgroups = suiteb_curves; |
538 | *pgroupslen = 1; | |
34e5292c DSH |
539 | break; |
540 | ||
541 | case SSL_CERT_FLAG_SUITEB_192_LOS: | |
ff6d20a6 DSH |
542 | *pgroups = suiteb_curves + 1; |
543 | *pgroupslen = 1; | |
34e5292c DSH |
544 | break; |
545 | ||
546 | default: | |
547 | if (s->ext.supportedgroups == NULL) { | |
ddf8f1ce MC |
548 | *pgroups = s->ctx->ext.supported_groups_default; |
549 | *pgroupslen = s->ctx->ext.supported_groups_default_len; | |
34e5292c | 550 | } else { |
ff6d20a6 DSH |
551 | *pgroups = s->ext.supportedgroups; |
552 | *pgroupslen = s->ext.supportedgroups_len; | |
0f113f3e | 553 | } |
34e5292c | 554 | break; |
0f113f3e | 555 | } |
0f113f3e | 556 | } |
b362ccab | 557 | |
8b1db5d3 MC |
558 | int tls_valid_group(SSL *s, uint16_t group_id, int minversion, int maxversion, |
559 | int isec, int *okfortls13) | |
9aaecbfc | 560 | { |
9d2d857f MC |
561 | const TLS_GROUP_INFO *ginfo = tls1_group_id_lookup(s->ctx, group_id); |
562 | int ret; | |
9aaecbfc | 563 | |
8b1db5d3 | 564 | if (okfortls13 != NULL) |
89e14ca7 | 565 | *okfortls13 = 0; |
8b1db5d3 | 566 | |
9d2d857f MC |
567 | if (ginfo == NULL) |
568 | return 0; | |
569 | ||
570 | if (SSL_IS_DTLS(s)) { | |
571 | if (ginfo->mindtls < 0 || ginfo->maxdtls < 0) | |
9aaecbfc | 572 | return 0; |
9d2d857f MC |
573 | if (ginfo->maxdtls == 0) |
574 | ret = 1; | |
575 | else | |
576 | ret = DTLS_VERSION_LE(minversion, ginfo->maxdtls); | |
577 | if (ginfo->mindtls > 0) | |
578 | ret &= DTLS_VERSION_GE(maxversion, ginfo->mindtls); | |
579 | } else { | |
580 | if (ginfo->mintls < 0 || ginfo->maxtls < 0) | |
581 | return 0; | |
582 | if (ginfo->maxtls == 0) | |
583 | ret = 1; | |
584 | else | |
585 | ret = (minversion <= ginfo->maxtls); | |
586 | if (ginfo->mintls > 0) | |
587 | ret &= (maxversion >= ginfo->mintls); | |
8b1db5d3 MC |
588 | if (ret && okfortls13 != NULL && maxversion == TLS1_3_VERSION) |
589 | *okfortls13 = (ginfo->maxtls == 0) | |
590 | || (ginfo->maxtls >= TLS1_3_VERSION); | |
9aaecbfc | 591 | } |
8b1db5d3 MC |
592 | ret &= !isec |
593 | || strcmp(ginfo->algorithm, "EC") == 0 | |
594 | || strcmp(ginfo->algorithm, "X25519") == 0 | |
595 | || strcmp(ginfo->algorithm, "X448") == 0; | |
9d2d857f MC |
596 | |
597 | return ret; | |
9aaecbfc | 598 | } |
599 | ||
dbc6268f MC |
600 | /* See if group is allowed by security callback */ |
601 | int tls_group_allowed(SSL *s, uint16_t group, int op) | |
0f113f3e | 602 | { |
9d2d857f | 603 | const TLS_GROUP_INFO *ginfo = tls1_group_id_lookup(s->ctx, group); |
dbc6268f | 604 | unsigned char gtmp[2]; |
5ce5f787 | 605 | |
dbc6268f | 606 | if (ginfo == NULL) |
0f113f3e | 607 | return 0; |
9d2d857f | 608 | |
dbc6268f MC |
609 | gtmp[0] = group >> 8; |
610 | gtmp[1] = group & 0xff; | |
9d2d857f | 611 | return ssl_security(s, op, ginfo->secbits, |
260009d8 | 612 | tls1_group_id2nid(ginfo->group_id, 0), (void *)gtmp); |
0f113f3e | 613 | } |
b362ccab | 614 | |
b50951d3 DSH |
615 | /* Return 1 if "id" is in "list" */ |
616 | static int tls1_in_list(uint16_t id, const uint16_t *list, size_t listlen) | |
617 | { | |
618 | size_t i; | |
619 | for (i = 0; i < listlen; i++) | |
620 | if (list[i] == id) | |
621 | return 1; | |
622 | return 0; | |
623 | } | |
624 | ||
1d97c843 | 625 | /*- |
8841154a | 626 | * For nmatch >= 0, return the id of the |nmatch|th shared group or 0 |
6977e8ee KR |
627 | * if there is no match. |
628 | * For nmatch == -1, return number of matches | |
8841154a | 629 | * For nmatch == -2, return the id of the group to use for |
b50951d3 | 630 | * a tmp key, or 0 if there is no match. |
d0595f17 | 631 | */ |
8841154a | 632 | uint16_t tls1_shared_group(SSL *s, int nmatch) |
0f113f3e | 633 | { |
9e84a42d | 634 | const uint16_t *pref, *supp; |
b50951d3 | 635 | size_t num_pref, num_supp, i; |
0f113f3e | 636 | int k; |
3e373518 | 637 | |
0f113f3e MC |
638 | /* Can't do anything on client side */ |
639 | if (s->server == 0) | |
8841154a | 640 | return 0; |
0f113f3e MC |
641 | if (nmatch == -2) { |
642 | if (tls1_suiteb(s)) { | |
643 | /* | |
644 | * For Suite B ciphersuite determines curve: we already know | |
645 | * these are acceptable due to previous checks. | |
646 | */ | |
555cbb32 | 647 | unsigned long cid = s->s3.tmp.new_cipher->id; |
3e373518 | 648 | |
0f113f3e | 649 | if (cid == TLS1_CK_ECDHE_ECDSA_WITH_AES_128_GCM_SHA256) |
0a10825a | 650 | return OSSL_TLS_GROUP_ID_secp256r1; |
0f113f3e | 651 | if (cid == TLS1_CK_ECDHE_ECDSA_WITH_AES_256_GCM_SHA384) |
0a10825a | 652 | return OSSL_TLS_GROUP_ID_secp384r1; |
0f113f3e | 653 | /* Should never happen */ |
8841154a | 654 | return 0; |
0f113f3e MC |
655 | } |
656 | /* If not Suite B just return first preference shared curve */ | |
657 | nmatch = 0; | |
658 | } | |
659 | /* | |
ff6d20a6 DSH |
660 | * If server preference set, our groups are the preference order |
661 | * otherwise peer decides. | |
0f113f3e | 662 | */ |
ff6d20a6 DSH |
663 | if (s->options & SSL_OP_CIPHER_SERVER_PREFERENCE) { |
664 | tls1_get_supported_groups(s, &pref, &num_pref); | |
665 | tls1_get_peer_groups(s, &supp, &num_supp); | |
666 | } else { | |
667 | tls1_get_peer_groups(s, &pref, &num_pref); | |
668 | tls1_get_supported_groups(s, &supp, &num_supp); | |
669 | } | |
3c06513f | 670 | |
9e84a42d DSH |
671 | for (k = 0, i = 0; i < num_pref; i++) { |
672 | uint16_t id = pref[i]; | |
0a10825a | 673 | uint16_t cid = id; |
3e373518 | 674 | |
0a10825a BE |
675 | if (SSL_IS_TLS13(s)) { |
676 | if (s->options & SSL_OP_CIPHER_SERVER_PREFERENCE) | |
677 | cid = ssl_group_id_internal_to_tls13(id); | |
678 | else | |
679 | cid = id = ssl_group_id_tls13_to_internal(id); | |
680 | } | |
681 | if (!tls1_in_list(cid, supp, num_supp) | |
682 | || !tls_group_allowed(s, id, SSL_SECOP_CURVE_SHARED)) | |
683 | continue; | |
b50951d3 DSH |
684 | if (nmatch == k) |
685 | return id; | |
686 | k++; | |
0f113f3e MC |
687 | } |
688 | if (nmatch == -1) | |
689 | return k; | |
690 | /* Out of range (nmatch > k). */ | |
8841154a | 691 | return 0; |
0f113f3e | 692 | } |
d0595f17 | 693 | |
9e84a42d | 694 | int tls1_set_groups(uint16_t **pext, size_t *pextlen, |
de4d764e | 695 | int *groups, size_t ngroups) |
0f113f3e | 696 | { |
9e84a42d | 697 | uint16_t *glist; |
0f113f3e MC |
698 | size_t i; |
699 | /* | |
9aaecbfc | 700 | * Bitmap of groups included to detect duplicates: two variables are added |
701 | * to detect duplicates as some values are more than 32. | |
0f113f3e | 702 | */ |
9aaecbfc | 703 | unsigned long *dup_list = NULL; |
704 | unsigned long dup_list_egrp = 0; | |
705 | unsigned long dup_list_dhgrp = 0; | |
cdb10bae | 706 | |
680bd131 | 707 | if (ngroups == 0) { |
6849b73c | 708 | ERR_raise(ERR_LIB_SSL, SSL_R_BAD_LENGTH); |
680bd131 MC |
709 | return 0; |
710 | } | |
cdb10bae | 711 | if ((glist = OPENSSL_malloc(ngroups * sizeof(*glist))) == NULL) { |
6849b73c | 712 | ERR_raise(ERR_LIB_SSL, ERR_R_MALLOC_FAILURE); |
0f113f3e | 713 | return 0; |
cdb10bae | 714 | } |
9e84a42d | 715 | for (i = 0; i < ngroups; i++) { |
0f113f3e | 716 | unsigned long idmask; |
9e84a42d | 717 | uint16_t id; |
4a1b4280 | 718 | id = tls1_nid2group_id(groups[i]); |
9aaecbfc | 719 | if ((id & 0x00FF) >= (sizeof(unsigned long) * 8)) |
720 | goto err; | |
721 | idmask = 1L << (id & 0x00FF); | |
722 | dup_list = (id < 0x100) ? &dup_list_egrp : &dup_list_dhgrp; | |
723 | if (!id || ((*dup_list) & idmask)) | |
724 | goto err; | |
725 | *dup_list |= idmask; | |
9e84a42d | 726 | glist[i] = id; |
0f113f3e | 727 | } |
b548a1f1 | 728 | OPENSSL_free(*pext); |
de4d764e | 729 | *pext = glist; |
9e84a42d | 730 | *pextlen = ngroups; |
0f113f3e | 731 | return 1; |
9aaecbfc | 732 | err: |
733 | OPENSSL_free(glist); | |
734 | return 0; | |
0f113f3e MC |
735 | } |
736 | ||
57e7401f | 737 | # define GROUPLIST_INCREMENT 40 |
0a8e6c1f | 738 | # define GROUP_NAME_BUFFER_LENGTH 64 |
0f113f3e | 739 | typedef struct { |
260009d8 MC |
740 | SSL_CTX *ctx; |
741 | size_t gidcnt; | |
57e7401f MC |
742 | size_t gidmax; |
743 | uint16_t *gid_arr; | |
260009d8 | 744 | } gid_cb_st; |
d0595f17 | 745 | |
260009d8 | 746 | static int gid_cb(const char *elem, int len, void *arg) |
0f113f3e | 747 | { |
260009d8 | 748 | gid_cb_st *garg = arg; |
0f113f3e | 749 | size_t i; |
260009d8 | 750 | uint16_t gid = 0; |
0a8e6c1f | 751 | char etmp[GROUP_NAME_BUFFER_LENGTH]; |
260009d8 | 752 | |
2747d73c KR |
753 | if (elem == NULL) |
754 | return 0; | |
57e7401f MC |
755 | if (garg->gidcnt == garg->gidmax) { |
756 | uint16_t *tmp = | |
757 | OPENSSL_realloc(garg->gid_arr, garg->gidmax + GROUPLIST_INCREMENT); | |
758 | if (tmp == NULL) | |
759 | return 0; | |
760 | garg->gidmax += GROUPLIST_INCREMENT; | |
761 | garg->gid_arr = tmp; | |
762 | } | |
0f113f3e MC |
763 | if (len > (int)(sizeof(etmp) - 1)) |
764 | return 0; | |
765 | memcpy(etmp, elem, len); | |
766 | etmp[len] = 0; | |
260009d8 MC |
767 | |
768 | gid = tls1_group_name2id(garg->ctx, etmp); | |
769 | if (gid == 0) | |
0f113f3e | 770 | return 0; |
260009d8 MC |
771 | for (i = 0; i < garg->gidcnt; i++) |
772 | if (garg->gid_arr[i] == gid) | |
0f113f3e | 773 | return 0; |
260009d8 | 774 | garg->gid_arr[garg->gidcnt++] = gid; |
0f113f3e MC |
775 | return 1; |
776 | } | |
777 | ||
260009d8 MC |
778 | /* Set groups based on a colon separated list */ |
779 | int tls1_set_groups_list(SSL_CTX *ctx, uint16_t **pext, size_t *pextlen, | |
780 | const char *str) | |
0f113f3e | 781 | { |
260009d8 MC |
782 | gid_cb_st gcb; |
783 | uint16_t *tmparr; | |
57e7401f | 784 | int ret = 0; |
260009d8 MC |
785 | |
786 | gcb.gidcnt = 0; | |
57e7401f MC |
787 | gcb.gidmax = GROUPLIST_INCREMENT; |
788 | gcb.gid_arr = OPENSSL_malloc(gcb.gidmax * sizeof(*gcb.gid_arr)); | |
789 | if (gcb.gid_arr == NULL) | |
790 | return 0; | |
260009d8 MC |
791 | gcb.ctx = ctx; |
792 | if (!CONF_parse_list(str, ':', 1, gid_cb, &gcb)) | |
57e7401f MC |
793 | goto end; |
794 | if (pext == NULL) { | |
795 | ret = 1; | |
796 | goto end; | |
797 | } | |
260009d8 MC |
798 | |
799 | /* | |
800 | * gid_cb ensurse there are no duplicates so we can just go ahead and set | |
801 | * the result | |
802 | */ | |
803 | tmparr = OPENSSL_memdup(gcb.gid_arr, gcb.gidcnt * sizeof(*tmparr)); | |
804 | if (tmparr == NULL) | |
57e7401f | 805 | goto end; |
260009d8 MC |
806 | *pext = tmparr; |
807 | *pextlen = gcb.gidcnt; | |
57e7401f MC |
808 | ret = 1; |
809 | end: | |
810 | OPENSSL_free(gcb.gid_arr); | |
811 | return ret; | |
0f113f3e | 812 | } |
b50951d3 | 813 | |
4a1b4280 | 814 | /* Check a group id matches preferences */ |
dcf8b01f | 815 | int tls1_check_group_id(SSL *s, uint16_t group_id, int check_own_groups) |
4a1b4280 DSH |
816 | { |
817 | const uint16_t *groups; | |
b50951d3 | 818 | size_t groups_len; |
4a1b4280 DSH |
819 | |
820 | if (group_id == 0) | |
821 | return 0; | |
822 | ||
6447e818 | 823 | /* Check for Suite B compliance */ |
555cbb32 TS |
824 | if (tls1_suiteb(s) && s->s3.tmp.new_cipher != NULL) { |
825 | unsigned long cid = s->s3.tmp.new_cipher->id; | |
6447e818 DSH |
826 | |
827 | if (cid == TLS1_CK_ECDHE_ECDSA_WITH_AES_128_GCM_SHA256) { | |
0a10825a | 828 | if (group_id != OSSL_TLS_GROUP_ID_secp256r1) |
6447e818 DSH |
829 | return 0; |
830 | } else if (cid == TLS1_CK_ECDHE_ECDSA_WITH_AES_256_GCM_SHA384) { | |
0a10825a | 831 | if (group_id != OSSL_TLS_GROUP_ID_secp384r1) |
6447e818 DSH |
832 | return 0; |
833 | } else { | |
834 | /* Should never happen */ | |
835 | return 0; | |
836 | } | |
837 | } | |
b50951d3 | 838 | |
dcf8b01f MC |
839 | if (check_own_groups) { |
840 | /* Check group is one of our preferences */ | |
841 | tls1_get_supported_groups(s, &groups, &groups_len); | |
842 | if (!tls1_in_list(group_id, groups, groups_len)) | |
843 | return 0; | |
844 | } | |
4a1b4280 | 845 | |
dbc6268f | 846 | if (!tls_group_allowed(s, group_id, SSL_SECOP_CURVE_CHECK)) |
6447e818 DSH |
847 | return 0; |
848 | ||
4a1b4280 DSH |
849 | /* For clients, nothing more to check */ |
850 | if (!s->server) | |
851 | return 1; | |
852 | ||
853 | /* Check group is one of peers preferences */ | |
ff6d20a6 | 854 | tls1_get_peer_groups(s, &groups, &groups_len); |
4a1b4280 DSH |
855 | |
856 | /* | |
857 | * RFC 4492 does not require the supported elliptic curves extension | |
858 | * so if it is not sent we can just choose any curve. | |
859 | * It is invalid to send an empty list in the supported groups | |
860 | * extension, so groups_len == 0 always means no extension. | |
861 | */ | |
862 | if (groups_len == 0) | |
863 | return 1; | |
b50951d3 | 864 | return tls1_in_list(group_id, groups, groups_len); |
0f113f3e | 865 | } |
d61ff83b | 866 | |
7da160b0 MC |
867 | void tls1_get_formatlist(SSL *s, const unsigned char **pformats, |
868 | size_t *num_formats) | |
0f113f3e MC |
869 | { |
870 | /* | |
871 | * If we have a custom point format list use it otherwise use default | |
872 | */ | |
aff8c126 RS |
873 | if (s->ext.ecpointformats) { |
874 | *pformats = s->ext.ecpointformats; | |
875 | *num_formats = s->ext.ecpointformats_len; | |
0f113f3e MC |
876 | } else { |
877 | *pformats = ecformats_default; | |
878 | /* For Suite B we don't support char2 fields */ | |
879 | if (tls1_suiteb(s)) | |
880 | *num_formats = sizeof(ecformats_default) - 1; | |
881 | else | |
882 | *num_formats = sizeof(ecformats_default); | |
883 | } | |
884 | } | |
885 | ||
dbc6268f MC |
886 | /* Check a key is compatible with compression extension */ |
887 | static int tls1_check_pkey_comp(SSL *s, EVP_PKEY *pkey) | |
888 | { | |
dbc6268f MC |
889 | unsigned char comp_id; |
890 | size_t i; | |
3d34bedf | 891 | int point_conv; |
dbc6268f MC |
892 | |
893 | /* If not an EC key nothing to check */ | |
c2041da8 | 894 | if (!EVP_PKEY_is_a(pkey, "EC")) |
dbc6268f | 895 | return 1; |
5b5eea4b | 896 | |
dbc6268f MC |
897 | |
898 | /* Get required compression id */ | |
3d34bedf MC |
899 | point_conv = EVP_PKEY_get_ec_point_conv_form(pkey); |
900 | if (point_conv == 0) | |
901 | return 0; | |
902 | if (point_conv == POINT_CONVERSION_UNCOMPRESSED) { | |
903 | comp_id = TLSEXT_ECPOINTFORMAT_uncompressed; | |
dbc6268f | 904 | } else if (SSL_IS_TLS13(s)) { |
5b5eea4b SL |
905 | /* |
906 | * ec_point_formats extension is not used in TLSv1.3 so we ignore | |
907 | * this check. | |
908 | */ | |
909 | return 1; | |
dbc6268f | 910 | } else { |
3d34bedf | 911 | int field_type = EVP_PKEY_get_field_type(pkey); |
dbc6268f | 912 | |
3d34bedf | 913 | if (field_type == NID_X9_62_prime_field) |
dbc6268f | 914 | comp_id = TLSEXT_ECPOINTFORMAT_ansiX962_compressed_prime; |
3d34bedf | 915 | else if (field_type == NID_X9_62_characteristic_two_field) |
dbc6268f MC |
916 | comp_id = TLSEXT_ECPOINTFORMAT_ansiX962_compressed_char2; |
917 | else | |
918 | return 0; | |
919 | } | |
920 | /* | |
921 | * If point formats extension present check it, otherwise everything is | |
922 | * supported (see RFC4492). | |
923 | */ | |
cd0fb43c | 924 | if (s->ext.peer_ecpointformats == NULL) |
dbc6268f MC |
925 | return 1; |
926 | ||
cd0fb43c MC |
927 | for (i = 0; i < s->ext.peer_ecpointformats_len; i++) { |
928 | if (s->ext.peer_ecpointformats[i] == comp_id) | |
dbc6268f MC |
929 | return 1; |
930 | } | |
931 | return 0; | |
932 | } | |
933 | ||
934 | /* Return group id of a key */ | |
935 | static uint16_t tls1_get_group_id(EVP_PKEY *pkey) | |
936 | { | |
d8975dec | 937 | int curve_nid = ssl_get_EC_curve_nid(pkey); |
dbc6268f | 938 | |
c2041da8 | 939 | if (curve_nid == NID_undef) |
dbc6268f | 940 | return 0; |
c2041da8 | 941 | return tls1_nid2group_id(curve_nid); |
dbc6268f MC |
942 | } |
943 | ||
0f113f3e MC |
944 | /* |
945 | * Check cert parameters compatible with extensions: currently just checks EC | |
946 | * certificates have compatible curves and compression. | |
d61ff83b | 947 | */ |
9195ddcd | 948 | static int tls1_check_cert_param(SSL *s, X509 *x, int check_ee_md) |
0f113f3e | 949 | { |
4a1b4280 | 950 | uint16_t group_id; |
0f113f3e | 951 | EVP_PKEY *pkey; |
8382fd3a | 952 | pkey = X509_get0_pubkey(x); |
4a1b4280 | 953 | if (pkey == NULL) |
0f113f3e MC |
954 | return 0; |
955 | /* If not EC nothing to do */ | |
c2041da8 | 956 | if (!EVP_PKEY_is_a(pkey, "EC")) |
0f113f3e | 957 | return 1; |
4a1b4280 DSH |
958 | /* Check compression */ |
959 | if (!tls1_check_pkey_comp(s, pkey)) | |
0f113f3e | 960 | return 0; |
4a1b4280 | 961 | group_id = tls1_get_group_id(pkey); |
dcf8b01f MC |
962 | /* |
963 | * For a server we allow the certificate to not be in our list of supported | |
964 | * groups. | |
965 | */ | |
966 | if (!tls1_check_group_id(s, group_id, !s->server)) | |
0f113f3e MC |
967 | return 0; |
968 | /* | |
969 | * Special case for suite B. We *MUST* sign using SHA256+P-256 or | |
9195ddcd | 970 | * SHA384+P-384. |
0f113f3e | 971 | */ |
9195ddcd | 972 | if (check_ee_md && tls1_suiteb(s)) { |
0f113f3e MC |
973 | int check_md; |
974 | size_t i; | |
9e84a42d | 975 | |
0f113f3e | 976 | /* Check to see we have necessary signing algorithm */ |
0a10825a | 977 | if (group_id == OSSL_TLS_GROUP_ID_secp256r1) |
0f113f3e | 978 | check_md = NID_ecdsa_with_SHA256; |
0a10825a | 979 | else if (group_id == OSSL_TLS_GROUP_ID_secp384r1) |
0f113f3e MC |
980 | check_md = NID_ecdsa_with_SHA384; |
981 | else | |
982 | return 0; /* Should never happen */ | |
29948ac8 BK |
983 | for (i = 0; i < s->shared_sigalgslen; i++) { |
984 | if (check_md == s->shared_sigalgs[i]->sigandhash) | |
1e331727 | 985 | return 1; |
4a1b4280 DSH |
986 | } |
987 | return 0; | |
0f113f3e | 988 | } |
4a1b4280 | 989 | return 1; |
0f113f3e MC |
990 | } |
991 | ||
6977e8ee | 992 | /* |
8483a003 | 993 | * tls1_check_ec_tmp_key - Check EC temporary key compatibility |
6977e8ee KR |
994 | * @s: SSL connection |
995 | * @cid: Cipher ID we're considering using | |
996 | * | |
997 | * Checks that the kECDHE cipher suite we're considering using | |
998 | * is compatible with the client extensions. | |
999 | * | |
1000 | * Returns 0 when the cipher can't be used or 1 when it can. | |
1001 | */ | |
2ea80354 | 1002 | int tls1_check_ec_tmp_key(SSL *s, unsigned long cid) |
0f113f3e | 1003 | { |
4a1b4280 DSH |
1004 | /* If not Suite B just need a shared group */ |
1005 | if (!tls1_suiteb(s)) | |
1006 | return tls1_shared_group(s, 0) != 0; | |
0f113f3e MC |
1007 | /* |
1008 | * If Suite B, AES128 MUST use P-256 and AES256 MUST use P-384, no other | |
1009 | * curves permitted. | |
1010 | */ | |
4a1b4280 | 1011 | if (cid == TLS1_CK_ECDHE_ECDSA_WITH_AES_128_GCM_SHA256) |
0a10825a | 1012 | return tls1_check_group_id(s, OSSL_TLS_GROUP_ID_secp256r1, 1); |
4a1b4280 | 1013 | if (cid == TLS1_CK_ECDHE_ECDSA_WITH_AES_256_GCM_SHA384) |
0a10825a | 1014 | return tls1_check_group_id(s, OSSL_TLS_GROUP_ID_secp384r1, 1); |
4a1b4280 DSH |
1015 | |
1016 | return 0; | |
0f113f3e | 1017 | } |
d0595f17 | 1018 | |
703bcee0 | 1019 | /* Default sigalg schemes */ |
98c792d1 | 1020 | static const uint16_t tls12_sigalgs[] = { |
703bcee0 MC |
1021 | TLSEXT_SIGALG_ecdsa_secp256r1_sha256, |
1022 | TLSEXT_SIGALG_ecdsa_secp384r1_sha384, | |
1023 | TLSEXT_SIGALG_ecdsa_secp521r1_sha512, | |
3d234c9e | 1024 | TLSEXT_SIGALG_ed25519, |
0e1d6ecf | 1025 | TLSEXT_SIGALG_ed448, |
0a10825a BE |
1026 | TLSEXT_SIGALG_ecdsa_brainpoolP256r1_sha256, |
1027 | TLSEXT_SIGALG_ecdsa_brainpoolP384r1_sha384, | |
1028 | TLSEXT_SIGALG_ecdsa_brainpoolP512r1_sha512, | |
0f113f3e | 1029 | |
f55e99f7 BK |
1030 | TLSEXT_SIGALG_rsa_pss_pss_sha256, |
1031 | TLSEXT_SIGALG_rsa_pss_pss_sha384, | |
1032 | TLSEXT_SIGALG_rsa_pss_pss_sha512, | |
1033 | TLSEXT_SIGALG_rsa_pss_rsae_sha256, | |
1034 | TLSEXT_SIGALG_rsa_pss_rsae_sha384, | |
1035 | TLSEXT_SIGALG_rsa_pss_rsae_sha512, | |
536199ec | 1036 | |
703bcee0 MC |
1037 | TLSEXT_SIGALG_rsa_pkcs1_sha256, |
1038 | TLSEXT_SIGALG_rsa_pkcs1_sha384, | |
1039 | TLSEXT_SIGALG_rsa_pkcs1_sha512, | |
0f113f3e | 1040 | |
d8311fc9 | 1041 | TLSEXT_SIGALG_ecdsa_sha224, |
42ab2230 | 1042 | TLSEXT_SIGALG_ecdsa_sha1, |
462f4f4b | 1043 | |
d8311fc9 | 1044 | TLSEXT_SIGALG_rsa_pkcs1_sha224, |
42ab2230 | 1045 | TLSEXT_SIGALG_rsa_pkcs1_sha1, |
e376242d | 1046 | |
d8311fc9 | 1047 | TLSEXT_SIGALG_dsa_sha224, |
42ab2230 MC |
1048 | TLSEXT_SIGALG_dsa_sha1, |
1049 | ||
703bcee0 MC |
1050 | TLSEXT_SIGALG_dsa_sha256, |
1051 | TLSEXT_SIGALG_dsa_sha384, | |
41f10305 | 1052 | TLSEXT_SIGALG_dsa_sha512, |
e376242d | 1053 | |
41f10305 | 1054 | #ifndef OPENSSL_NO_GOST |
6f892296 NM |
1055 | TLSEXT_SIGALG_gostr34102012_256_intrinsic, |
1056 | TLSEXT_SIGALG_gostr34102012_512_intrinsic, | |
41f10305 DB |
1057 | TLSEXT_SIGALG_gostr34102012_256_gostr34112012_256, |
1058 | TLSEXT_SIGALG_gostr34102012_512_gostr34112012_512, | |
1059 | TLSEXT_SIGALG_gostr34102001_gostr3411, | |
5eeb6c6e | 1060 | #endif |
fc101f88 | 1061 | }; |
0f113f3e | 1062 | |
462f4f4b | 1063 | |
98c792d1 | 1064 | static const uint16_t suiteb_sigalgs[] = { |
703bcee0 MC |
1065 | TLSEXT_SIGALG_ecdsa_secp256r1_sha256, |
1066 | TLSEXT_SIGALG_ecdsa_secp384r1_sha384 | |
2ea80354 | 1067 | }; |
aff8c126 | 1068 | |
7a531ee4 | 1069 | static const SIGALG_LOOKUP sigalg_lookup_tbl[] = { |
edbfba1a | 1070 | {"ecdsa_secp256r1_sha256", TLSEXT_SIGALG_ecdsa_secp256r1_sha256, |
17ae384e | 1071 | NID_sha256, SSL_MD_SHA256_IDX, EVP_PKEY_EC, SSL_PKEY_ECC, |
263ff2c9 | 1072 | NID_ecdsa_with_SHA256, NID_X9_62_prime256v1, 1}, |
edbfba1a | 1073 | {"ecdsa_secp384r1_sha384", TLSEXT_SIGALG_ecdsa_secp384r1_sha384, |
17ae384e | 1074 | NID_sha384, SSL_MD_SHA384_IDX, EVP_PKEY_EC, SSL_PKEY_ECC, |
263ff2c9 | 1075 | NID_ecdsa_with_SHA384, NID_secp384r1, 1}, |
edbfba1a | 1076 | {"ecdsa_secp521r1_sha512", TLSEXT_SIGALG_ecdsa_secp521r1_sha512, |
17ae384e | 1077 | NID_sha512, SSL_MD_SHA512_IDX, EVP_PKEY_EC, SSL_PKEY_ECC, |
263ff2c9 | 1078 | NID_ecdsa_with_SHA512, NID_secp521r1, 1}, |
b04d4e38 | 1079 | {"ed25519", TLSEXT_SIGALG_ed25519, |
d2916a5b | 1080 | NID_undef, -1, EVP_PKEY_ED25519, SSL_PKEY_ED25519, |
263ff2c9 | 1081 | NID_undef, NID_undef, 1}, |
0e1d6ecf MC |
1082 | {"ed448", TLSEXT_SIGALG_ed448, |
1083 | NID_undef, -1, EVP_PKEY_ED448, SSL_PKEY_ED448, | |
263ff2c9 | 1084 | NID_undef, NID_undef, 1}, |
d8311fc9 MC |
1085 | {NULL, TLSEXT_SIGALG_ecdsa_sha224, |
1086 | NID_sha224, SSL_MD_SHA224_IDX, EVP_PKEY_EC, SSL_PKEY_ECC, | |
263ff2c9 | 1087 | NID_ecdsa_with_SHA224, NID_undef, 1}, |
edbfba1a | 1088 | {NULL, TLSEXT_SIGALG_ecdsa_sha1, |
17ae384e | 1089 | NID_sha1, SSL_MD_SHA1_IDX, EVP_PKEY_EC, SSL_PKEY_ECC, |
263ff2c9 | 1090 | NID_ecdsa_with_SHA1, NID_undef, 1}, |
0a10825a BE |
1091 | {"ecdsa_brainpoolP256r1_sha256", TLSEXT_SIGALG_ecdsa_brainpoolP256r1_sha256, |
1092 | NID_sha256, SSL_MD_SHA256_IDX, EVP_PKEY_EC, SSL_PKEY_ECC, | |
1093 | NID_ecdsa_with_SHA256, NID_brainpoolP256r1, 1}, | |
1094 | {"ecdsa_brainpoolP384r1_sha384", TLSEXT_SIGALG_ecdsa_brainpoolP384r1_sha384, | |
1095 | NID_sha384, SSL_MD_SHA384_IDX, EVP_PKEY_EC, SSL_PKEY_ECC, | |
1096 | NID_ecdsa_with_SHA384, NID_brainpoolP384r1, 1}, | |
1097 | {"ecdsa_brainpoolP512r1_sha512", TLSEXT_SIGALG_ecdsa_brainpoolP512r1_sha512, | |
1098 | NID_sha512, SSL_MD_SHA512_IDX, EVP_PKEY_EC, SSL_PKEY_ECC, | |
1099 | NID_ecdsa_with_SHA512, NID_brainpoolP512r1, 1}, | |
f55e99f7 BK |
1100 | {"rsa_pss_rsae_sha256", TLSEXT_SIGALG_rsa_pss_rsae_sha256, |
1101 | NID_sha256, SSL_MD_SHA256_IDX, EVP_PKEY_RSA_PSS, SSL_PKEY_RSA, | |
263ff2c9 | 1102 | NID_undef, NID_undef, 1}, |
f55e99f7 BK |
1103 | {"rsa_pss_rsae_sha384", TLSEXT_SIGALG_rsa_pss_rsae_sha384, |
1104 | NID_sha384, SSL_MD_SHA384_IDX, EVP_PKEY_RSA_PSS, SSL_PKEY_RSA, | |
263ff2c9 | 1105 | NID_undef, NID_undef, 1}, |
f55e99f7 BK |
1106 | {"rsa_pss_rsae_sha512", TLSEXT_SIGALG_rsa_pss_rsae_sha512, |
1107 | NID_sha512, SSL_MD_SHA512_IDX, EVP_PKEY_RSA_PSS, SSL_PKEY_RSA, | |
263ff2c9 | 1108 | NID_undef, NID_undef, 1}, |
f55e99f7 | 1109 | {"rsa_pss_pss_sha256", TLSEXT_SIGALG_rsa_pss_pss_sha256, |
17ae384e | 1110 | NID_sha256, SSL_MD_SHA256_IDX, EVP_PKEY_RSA_PSS, SSL_PKEY_RSA_PSS_SIGN, |
263ff2c9 | 1111 | NID_undef, NID_undef, 1}, |
f55e99f7 | 1112 | {"rsa_pss_pss_sha384", TLSEXT_SIGALG_rsa_pss_pss_sha384, |
17ae384e | 1113 | NID_sha384, SSL_MD_SHA384_IDX, EVP_PKEY_RSA_PSS, SSL_PKEY_RSA_PSS_SIGN, |
263ff2c9 | 1114 | NID_undef, NID_undef, 1}, |
f55e99f7 | 1115 | {"rsa_pss_pss_sha512", TLSEXT_SIGALG_rsa_pss_pss_sha512, |
17ae384e | 1116 | NID_sha512, SSL_MD_SHA512_IDX, EVP_PKEY_RSA_PSS, SSL_PKEY_RSA_PSS_SIGN, |
263ff2c9 | 1117 | NID_undef, NID_undef, 1}, |
edbfba1a | 1118 | {"rsa_pkcs1_sha256", TLSEXT_SIGALG_rsa_pkcs1_sha256, |
d0ff28f8 | 1119 | NID_sha256, SSL_MD_SHA256_IDX, EVP_PKEY_RSA, SSL_PKEY_RSA, |
263ff2c9 | 1120 | NID_sha256WithRSAEncryption, NID_undef, 1}, |
edbfba1a | 1121 | {"rsa_pkcs1_sha384", TLSEXT_SIGALG_rsa_pkcs1_sha384, |
d0ff28f8 | 1122 | NID_sha384, SSL_MD_SHA384_IDX, EVP_PKEY_RSA, SSL_PKEY_RSA, |
263ff2c9 | 1123 | NID_sha384WithRSAEncryption, NID_undef, 1}, |
edbfba1a | 1124 | {"rsa_pkcs1_sha512", TLSEXT_SIGALG_rsa_pkcs1_sha512, |
d0ff28f8 | 1125 | NID_sha512, SSL_MD_SHA512_IDX, EVP_PKEY_RSA, SSL_PKEY_RSA, |
263ff2c9 | 1126 | NID_sha512WithRSAEncryption, NID_undef, 1}, |
d8311fc9 MC |
1127 | {"rsa_pkcs1_sha224", TLSEXT_SIGALG_rsa_pkcs1_sha224, |
1128 | NID_sha224, SSL_MD_SHA224_IDX, EVP_PKEY_RSA, SSL_PKEY_RSA, | |
263ff2c9 | 1129 | NID_sha224WithRSAEncryption, NID_undef, 1}, |
edbfba1a | 1130 | {"rsa_pkcs1_sha1", TLSEXT_SIGALG_rsa_pkcs1_sha1, |
d0ff28f8 | 1131 | NID_sha1, SSL_MD_SHA1_IDX, EVP_PKEY_RSA, SSL_PKEY_RSA, |
263ff2c9 | 1132 | NID_sha1WithRSAEncryption, NID_undef, 1}, |
edbfba1a | 1133 | {NULL, TLSEXT_SIGALG_dsa_sha256, |
17ae384e | 1134 | NID_sha256, SSL_MD_SHA256_IDX, EVP_PKEY_DSA, SSL_PKEY_DSA_SIGN, |
263ff2c9 | 1135 | NID_dsa_with_SHA256, NID_undef, 1}, |
edbfba1a | 1136 | {NULL, TLSEXT_SIGALG_dsa_sha384, |
17ae384e | 1137 | NID_sha384, SSL_MD_SHA384_IDX, EVP_PKEY_DSA, SSL_PKEY_DSA_SIGN, |
263ff2c9 | 1138 | NID_undef, NID_undef, 1}, |
edbfba1a | 1139 | {NULL, TLSEXT_SIGALG_dsa_sha512, |
17ae384e | 1140 | NID_sha512, SSL_MD_SHA512_IDX, EVP_PKEY_DSA, SSL_PKEY_DSA_SIGN, |
263ff2c9 | 1141 | NID_undef, NID_undef, 1}, |
d8311fc9 MC |
1142 | {NULL, TLSEXT_SIGALG_dsa_sha224, |
1143 | NID_sha224, SSL_MD_SHA224_IDX, EVP_PKEY_DSA, SSL_PKEY_DSA_SIGN, | |
263ff2c9 | 1144 | NID_undef, NID_undef, 1}, |
edbfba1a | 1145 | {NULL, TLSEXT_SIGALG_dsa_sha1, |
17ae384e | 1146 | NID_sha1, SSL_MD_SHA1_IDX, EVP_PKEY_DSA, SSL_PKEY_DSA_SIGN, |
263ff2c9 | 1147 | NID_dsaWithSHA1, NID_undef, 1}, |
5eeb6c6e | 1148 | #ifndef OPENSSL_NO_GOST |
6f892296 NM |
1149 | {NULL, TLSEXT_SIGALG_gostr34102012_256_intrinsic, |
1150 | NID_id_GostR3411_2012_256, SSL_MD_GOST12_256_IDX, | |
1151 | NID_id_GostR3410_2012_256, SSL_PKEY_GOST12_256, | |
263ff2c9 | 1152 | NID_undef, NID_undef, 1}, |
6f892296 NM |
1153 | {NULL, TLSEXT_SIGALG_gostr34102012_512_intrinsic, |
1154 | NID_id_GostR3411_2012_512, SSL_MD_GOST12_512_IDX, | |
1155 | NID_id_GostR3410_2012_512, SSL_PKEY_GOST12_512, | |
263ff2c9 | 1156 | NID_undef, NID_undef, 1}, |
edbfba1a | 1157 | {NULL, TLSEXT_SIGALG_gostr34102012_256_gostr34112012_256, |
17ae384e DSH |
1158 | NID_id_GostR3411_2012_256, SSL_MD_GOST12_256_IDX, |
1159 | NID_id_GostR3410_2012_256, SSL_PKEY_GOST12_256, | |
263ff2c9 | 1160 | NID_undef, NID_undef, 1}, |
edbfba1a | 1161 | {NULL, TLSEXT_SIGALG_gostr34102012_512_gostr34112012_512, |
17ae384e DSH |
1162 | NID_id_GostR3411_2012_512, SSL_MD_GOST12_512_IDX, |
1163 | NID_id_GostR3410_2012_512, SSL_PKEY_GOST12_512, | |
263ff2c9 | 1164 | NID_undef, NID_undef, 1}, |
edbfba1a | 1165 | {NULL, TLSEXT_SIGALG_gostr34102001_gostr3411, |
17ae384e DSH |
1166 | NID_id_GostR3411_94, SSL_MD_GOST94_IDX, |
1167 | NID_id_GostR3410_2001, SSL_PKEY_GOST01, | |
263ff2c9 | 1168 | NID_undef, NID_undef, 1} |
5eeb6c6e | 1169 | #endif |
703bcee0 | 1170 | }; |
0972bc5c DSH |
1171 | /* Legacy sigalgs for TLS < 1.2 RSA TLS signatures */ |
1172 | static const SIGALG_LOOKUP legacy_rsa_sigalg = { | |
1173 | "rsa_pkcs1_md5_sha1", 0, | |
1174 | NID_md5_sha1, SSL_MD_MD5_SHA1_IDX, | |
1175 | EVP_PKEY_RSA, SSL_PKEY_RSA, | |
263ff2c9 | 1176 | NID_undef, NID_undef, 1 |
0972bc5c DSH |
1177 | }; |
1178 | ||
1179 | /* | |
1180 | * Default signature algorithm values used if signature algorithms not present. | |
1181 | * From RFC5246. Note: order must match certificate index order. | |
1182 | */ | |
1183 | static const uint16_t tls_default_sigalg[] = { | |
1184 | TLSEXT_SIGALG_rsa_pkcs1_sha1, /* SSL_PKEY_RSA */ | |
045d078a | 1185 | 0, /* SSL_PKEY_RSA_PSS_SIGN */ |
0972bc5c DSH |
1186 | TLSEXT_SIGALG_dsa_sha1, /* SSL_PKEY_DSA_SIGN */ |
1187 | TLSEXT_SIGALG_ecdsa_sha1, /* SSL_PKEY_ECC */ | |
1188 | TLSEXT_SIGALG_gostr34102001_gostr3411, /* SSL_PKEY_GOST01 */ | |
6f892296 NM |
1189 | TLSEXT_SIGALG_gostr34102012_256_intrinsic, /* SSL_PKEY_GOST12_256 */ |
1190 | TLSEXT_SIGALG_gostr34102012_512_intrinsic, /* SSL_PKEY_GOST12_512 */ | |
0e1d6ecf MC |
1191 | 0, /* SSL_PKEY_ED25519 */ |
1192 | 0, /* SSL_PKEY_ED448 */ | |
0972bc5c | 1193 | }; |
703bcee0 | 1194 | |
263ff2c9 MC |
1195 | int ssl_setup_sig_algs(SSL_CTX *ctx) |
1196 | { | |
1197 | size_t i; | |
1198 | const SIGALG_LOOKUP *lu; | |
1199 | SIGALG_LOOKUP *cache | |
1200 | = OPENSSL_malloc(sizeof(*lu) * OSSL_NELEM(sigalg_lookup_tbl)); | |
1201 | EVP_PKEY *tmpkey = EVP_PKEY_new(); | |
1202 | int ret = 0; | |
1203 | ||
1204 | if (cache == NULL || tmpkey == NULL) | |
1205 | goto err; | |
1206 | ||
1207 | ERR_set_mark(); | |
1208 | for (i = 0, lu = sigalg_lookup_tbl; | |
1209 | i < OSSL_NELEM(sigalg_lookup_tbl); lu++, i++) { | |
1210 | EVP_PKEY_CTX *pctx; | |
1211 | ||
1212 | cache[i] = *lu; | |
1213 | ||
1214 | /* | |
1215 | * Check hash is available. | |
57e7401f | 1216 | * This test is not perfect. A provider could have support |
263ff2c9 MC |
1217 | * for a signature scheme, but not a particular hash. However the hash |
1218 | * could be available from some other loaded provider. In that case it | |
1219 | * could be that the signature is available, and the hash is available | |
1220 | * independently - but not as a combination. We ignore this for now. | |
1221 | */ | |
1222 | if (lu->hash != NID_undef | |
1223 | && ctx->ssl_digest_methods[lu->hash_idx] == NULL) { | |
1224 | cache[i].enabled = 0; | |
1225 | continue; | |
1226 | } | |
1227 | ||
1228 | if (!EVP_PKEY_set_type(tmpkey, lu->sig)) { | |
1229 | cache[i].enabled = 0; | |
1230 | continue; | |
1231 | } | |
1232 | pctx = EVP_PKEY_CTX_new_from_pkey(ctx->libctx, tmpkey, ctx->propq); | |
1233 | /* If unable to create pctx we assume the sig algorithm is unavailable */ | |
1234 | if (pctx == NULL) | |
1235 | cache[i].enabled = 0; | |
1236 | EVP_PKEY_CTX_free(pctx); | |
1237 | } | |
1238 | ERR_pop_to_mark(); | |
1239 | ctx->sigalg_lookup_cache = cache; | |
1240 | cache = NULL; | |
1241 | ||
1242 | ret = 1; | |
1243 | err: | |
1244 | OPENSSL_free(cache); | |
1245 | EVP_PKEY_free(tmpkey); | |
1246 | return ret; | |
1247 | } | |
1248 | ||
4d43ee28 | 1249 | /* Lookup TLS signature algorithm */ |
263ff2c9 | 1250 | static const SIGALG_LOOKUP *tls1_lookup_sigalg(const SSL *s, uint16_t sigalg) |
703bcee0 MC |
1251 | { |
1252 | size_t i; | |
263ff2c9 | 1253 | const SIGALG_LOOKUP *lu; |
703bcee0 | 1254 | |
263ff2c9 MC |
1255 | for (i = 0, lu = s->ctx->sigalg_lookup_cache; |
1256 | /* cache should have the same number of elements as sigalg_lookup_tbl */ | |
1257 | i < OSSL_NELEM(sigalg_lookup_tbl); | |
1258 | lu++, i++) { | |
54e3efff MC |
1259 | if (lu->sigalg == sigalg) { |
1260 | if (!lu->enabled) | |
1261 | return NULL; | |
263ff2c9 | 1262 | return lu; |
54e3efff | 1263 | } |
703bcee0 | 1264 | } |
4d43ee28 DSH |
1265 | return NULL; |
1266 | } | |
168067b6 | 1267 | /* Lookup hash: return 0 if invalid or not enabled */ |
c8f6c28a | 1268 | int tls1_lookup_md(SSL_CTX *ctx, const SIGALG_LOOKUP *lu, const EVP_MD **pmd) |
168067b6 DSH |
1269 | { |
1270 | const EVP_MD *md; | |
1271 | if (lu == NULL) | |
1272 | return 0; | |
1273 | /* lu->hash == NID_undef means no associated digest */ | |
1274 | if (lu->hash == NID_undef) { | |
1275 | md = NULL; | |
1276 | } else { | |
c8f6c28a | 1277 | md = ssl_md(ctx, lu->hash_idx); |
168067b6 DSH |
1278 | if (md == NULL) |
1279 | return 0; | |
1280 | } | |
1281 | if (pmd) | |
1282 | *pmd = md; | |
1283 | return 1; | |
1284 | } | |
1285 | ||
0fe3db25 NR |
1286 | /* |
1287 | * Check if key is large enough to generate RSA-PSS signature. | |
1288 | * | |
1289 | * The key must greater than or equal to 2 * hash length + 2. | |
1290 | * SHA512 has a hash length of 64 bytes, which is incompatible | |
1291 | * with a 128 byte (1024 bit) key. | |
1292 | */ | |
ed576acd | 1293 | #define RSA_PSS_MINIMUM_KEY_SIZE(md) (2 * EVP_MD_get_size(md) + 2) |
c5f87134 | 1294 | static int rsa_pss_check_min_key_size(SSL_CTX *ctx, const EVP_PKEY *pkey, |
c8f6c28a | 1295 | const SIGALG_LOOKUP *lu) |
0fe3db25 NR |
1296 | { |
1297 | const EVP_MD *md; | |
1298 | ||
c5f87134 | 1299 | if (pkey == NULL) |
0fe3db25 | 1300 | return 0; |
c8f6c28a | 1301 | if (!tls1_lookup_md(ctx, lu, &md) || md == NULL) |
0fe3db25 | 1302 | return 0; |
ed576acd | 1303 | if (EVP_PKEY_get_size(pkey) < RSA_PSS_MINIMUM_KEY_SIZE(md)) |
0fe3db25 NR |
1304 | return 0; |
1305 | return 1; | |
1306 | } | |
1307 | ||
0972bc5c | 1308 | /* |
b0031e5d KR |
1309 | * Returns a signature algorithm when the peer did not send a list of supported |
1310 | * signature algorithms. The signature algorithm is fixed for the certificate | |
1311 | * type. |idx| is a certificate type index (SSL_PKEY_*). When |idx| is -1 the | |
1312 | * certificate type from |s| will be used. | |
1313 | * Returns the signature algorithm to use, or NULL on error. | |
0972bc5c DSH |
1314 | */ |
1315 | static const SIGALG_LOOKUP *tls1_get_legacy_sigalg(const SSL *s, int idx) | |
1316 | { | |
7f6b466b DSH |
1317 | if (idx == -1) { |
1318 | if (s->server) { | |
1319 | size_t i; | |
1320 | ||
1321 | /* Work out index corresponding to ciphersuite */ | |
1322 | for (i = 0; i < SSL_PKEY_NUM; i++) { | |
1323 | const SSL_CERT_LOOKUP *clu = ssl_cert_lookup_by_idx(i); | |
1324 | ||
ed5b26ce P |
1325 | if (clu == NULL) |
1326 | continue; | |
555cbb32 | 1327 | if (clu->amask & s->s3.tmp.new_cipher->algorithm_auth) { |
7f6b466b DSH |
1328 | idx = i; |
1329 | break; | |
1330 | } | |
1331 | } | |
1f65c045 DB |
1332 | |
1333 | /* | |
1334 | * Some GOST ciphersuites allow more than one signature algorithms | |
1335 | * */ | |
555cbb32 | 1336 | if (idx == SSL_PKEY_GOST01 && s->s3.tmp.new_cipher->algorithm_auth != SSL_aGOST01) { |
1f65c045 DB |
1337 | int real_idx; |
1338 | ||
1339 | for (real_idx = SSL_PKEY_GOST12_512; real_idx >= SSL_PKEY_GOST01; | |
1340 | real_idx--) { | |
1341 | if (s->cert->pkeys[real_idx].privatekey != NULL) { | |
1342 | idx = real_idx; | |
1343 | break; | |
1344 | } | |
1345 | } | |
1346 | } | |
5a5530a2 DB |
1347 | /* |
1348 | * As both SSL_PKEY_GOST12_512 and SSL_PKEY_GOST12_256 indices can be used | |
1349 | * with new (aGOST12-only) ciphersuites, we should find out which one is available really. | |
1350 | */ | |
1351 | else if (idx == SSL_PKEY_GOST12_256) { | |
1352 | int real_idx; | |
1353 | ||
1354 | for (real_idx = SSL_PKEY_GOST12_512; real_idx >= SSL_PKEY_GOST12_256; | |
1355 | real_idx--) { | |
1356 | if (s->cert->pkeys[real_idx].privatekey != NULL) { | |
1357 | idx = real_idx; | |
1358 | break; | |
1359 | } | |
1360 | } | |
1361 | } | |
7f6b466b DSH |
1362 | } else { |
1363 | idx = s->cert->key - s->cert->pkeys; | |
1364 | } | |
1365 | } | |
0972bc5c DSH |
1366 | if (idx < 0 || idx >= (int)OSSL_NELEM(tls_default_sigalg)) |
1367 | return NULL; | |
1368 | if (SSL_USE_SIGALGS(s) || idx != SSL_PKEY_RSA) { | |
263ff2c9 | 1369 | const SIGALG_LOOKUP *lu = tls1_lookup_sigalg(s, tls_default_sigalg[idx]); |
0972bc5c | 1370 | |
54e3efff MC |
1371 | if (lu == NULL) |
1372 | return NULL; | |
c8f6c28a | 1373 | if (!tls1_lookup_md(s->ctx, lu, NULL)) |
0972bc5c | 1374 | return NULL; |
b0031e5d KR |
1375 | if (!tls12_sigalg_allowed(s, SSL_SECOP_SIGALG_SUPPORTED, lu)) |
1376 | return NULL; | |
0972bc5c DSH |
1377 | return lu; |
1378 | } | |
b0031e5d KR |
1379 | if (!tls12_sigalg_allowed(s, SSL_SECOP_SIGALG_SUPPORTED, &legacy_rsa_sigalg)) |
1380 | return NULL; | |
0972bc5c DSH |
1381 | return &legacy_rsa_sigalg; |
1382 | } | |
1383 | /* Set peer sigalg based key type */ | |
1384 | int tls1_set_peer_legacy_sigalg(SSL *s, const EVP_PKEY *pkey) | |
1385 | { | |
52fd27f9 DSH |
1386 | size_t idx; |
1387 | const SIGALG_LOOKUP *lu; | |
0972bc5c | 1388 | |
52fd27f9 DSH |
1389 | if (ssl_cert_lookup_by_pkey(pkey, &idx) == NULL) |
1390 | return 0; | |
1391 | lu = tls1_get_legacy_sigalg(s, idx); | |
0972bc5c DSH |
1392 | if (lu == NULL) |
1393 | return 0; | |
555cbb32 | 1394 | s->s3.tmp.peer_sigalg = lu; |
0972bc5c DSH |
1395 | return 1; |
1396 | } | |
703bcee0 | 1397 | |
98c792d1 | 1398 | size_t tls12_get_psigalgs(SSL *s, int sent, const uint16_t **psigs) |
0f113f3e MC |
1399 | { |
1400 | /* | |
1401 | * If Suite B mode use Suite B sigalgs only, ignore any other | |
1402 | * preferences. | |
1403 | */ | |
0f113f3e MC |
1404 | switch (tls1_suiteb(s)) { |
1405 | case SSL_CERT_FLAG_SUITEB_128_LOS: | |
1406 | *psigs = suiteb_sigalgs; | |
7a531ee4 | 1407 | return OSSL_NELEM(suiteb_sigalgs); |
0f113f3e MC |
1408 | |
1409 | case SSL_CERT_FLAG_SUITEB_128_LOS_ONLY: | |
1410 | *psigs = suiteb_sigalgs; | |
7a531ee4 | 1411 | return 1; |
0f113f3e MC |
1412 | |
1413 | case SSL_CERT_FLAG_SUITEB_192_LOS: | |
7a531ee4 MC |
1414 | *psigs = suiteb_sigalgs + 1; |
1415 | return 1; | |
0f113f3e | 1416 | } |
a9669ddc DSH |
1417 | /* |
1418 | * We use client_sigalgs (if not NULL) if we're a server | |
1419 | * and sending a certificate request or if we're a client and | |
1420 | * determining which shared algorithm to use. | |
1421 | */ | |
1422 | if ((s->server == sent) && s->cert->client_sigalgs != NULL) { | |
0f113f3e MC |
1423 | *psigs = s->cert->client_sigalgs; |
1424 | return s->cert->client_sigalgslen; | |
1425 | } else if (s->cert->conf_sigalgs) { | |
1426 | *psigs = s->cert->conf_sigalgs; | |
1427 | return s->cert->conf_sigalgslen; | |
1428 | } else { | |
1429 | *psigs = tls12_sigalgs; | |
703bcee0 | 1430 | return OSSL_NELEM(tls12_sigalgs); |
0f113f3e MC |
1431 | } |
1432 | } | |
1433 | ||
de4dc598 MC |
1434 | /* |
1435 | * Called by servers only. Checks that we have a sig alg that supports the | |
1436 | * specified EC curve. | |
1437 | */ | |
1438 | int tls_check_sigalg_curve(const SSL *s, int curve) | |
1439 | { | |
1440 | const uint16_t *sigs; | |
1441 | size_t siglen, i; | |
1442 | ||
1443 | if (s->cert->conf_sigalgs) { | |
1444 | sigs = s->cert->conf_sigalgs; | |
1445 | siglen = s->cert->conf_sigalgslen; | |
1446 | } else { | |
1447 | sigs = tls12_sigalgs; | |
1448 | siglen = OSSL_NELEM(tls12_sigalgs); | |
1449 | } | |
1450 | ||
1451 | for (i = 0; i < siglen; i++) { | |
263ff2c9 | 1452 | const SIGALG_LOOKUP *lu = tls1_lookup_sigalg(s, sigs[i]); |
de4dc598 MC |
1453 | |
1454 | if (lu == NULL) | |
1455 | continue; | |
1456 | if (lu->sig == EVP_PKEY_EC | |
1457 | && lu->curve != NID_undef | |
1458 | && curve == lu->curve) | |
1459 | return 1; | |
1460 | } | |
1461 | ||
1462 | return 0; | |
1463 | } | |
1464 | ||
620c97b6 KR |
1465 | /* |
1466 | * Return the number of security bits for the signature algorithm, or 0 on | |
1467 | * error. | |
1468 | */ | |
1469 | static int sigalg_security_bits(SSL_CTX *ctx, const SIGALG_LOOKUP *lu) | |
1470 | { | |
1471 | const EVP_MD *md = NULL; | |
1472 | int secbits = 0; | |
1473 | ||
1474 | if (!tls1_lookup_md(ctx, lu, &md)) | |
1475 | return 0; | |
1476 | if (md != NULL) | |
1477 | { | |
ed576acd | 1478 | int md_type = EVP_MD_get_type(md); |
aba03ae5 | 1479 | |
620c97b6 | 1480 | /* Security bits: half digest bits */ |
ed576acd | 1481 | secbits = EVP_MD_get_size(md) * 4; |
aba03ae5 KR |
1482 | /* |
1483 | * SHA1 and MD5 are known to be broken. Reduce security bits so that | |
1484 | * they're no longer accepted at security level 1. The real values don't | |
1485 | * really matter as long as they're lower than 80, which is our | |
1486 | * security level 1. | |
1487 | * https://eprint.iacr.org/2020/014 puts a chosen-prefix attack for | |
1488 | * SHA1 at 2^63.4 and MD5+SHA1 at 2^67.2 | |
1489 | * https://documents.epfl.ch/users/l/le/lenstra/public/papers/lat.pdf | |
1490 | * puts a chosen-prefix attack for MD5 at 2^39. | |
5ea4d764 | 1491 | */ |
aba03ae5 KR |
1492 | if (md_type == NID_sha1) |
1493 | secbits = 64; | |
1494 | else if (md_type == NID_md5_sha1) | |
1495 | secbits = 67; | |
1496 | else if (md_type == NID_md5) | |
1497 | secbits = 39; | |
620c97b6 KR |
1498 | } else { |
1499 | /* Values from https://tools.ietf.org/html/rfc8032#section-8.5 */ | |
1500 | if (lu->sigalg == TLSEXT_SIGALG_ed25519) | |
1501 | secbits = 128; | |
1502 | else if (lu->sigalg == TLSEXT_SIGALG_ed448) | |
1503 | secbits = 224; | |
1504 | } | |
1505 | return secbits; | |
1506 | } | |
1507 | ||
0f113f3e MC |
1508 | /* |
1509 | * Check signature algorithm is consistent with sent supported signature | |
b2eb6998 DSH |
1510 | * algorithms and if so set relevant digest and signature scheme in |
1511 | * s. | |
ec4a50b3 | 1512 | */ |
f742cda8 | 1513 | int tls12_check_peer_sigalg(SSL *s, uint16_t sig, EVP_PKEY *pkey) |
0f113f3e | 1514 | { |
98c792d1 | 1515 | const uint16_t *sent_sigs; |
5554facb | 1516 | const EVP_MD *md = NULL; |
703bcee0 | 1517 | char sigalgstr[2]; |
11d2641f | 1518 | size_t sent_sigslen, i, cidx; |
c2041da8 | 1519 | int pkeyid = -1; |
f742cda8 | 1520 | const SIGALG_LOOKUP *lu; |
620c97b6 | 1521 | int secbits = 0; |
4d43ee28 | 1522 | |
ed576acd | 1523 | pkeyid = EVP_PKEY_get_id(pkey); |
0f113f3e | 1524 | /* Should never happen */ |
536199ec | 1525 | if (pkeyid == -1) |
0f113f3e | 1526 | return -1; |
5a8916d9 DSH |
1527 | if (SSL_IS_TLS13(s)) { |
1528 | /* Disallow DSA for TLS 1.3 */ | |
1529 | if (pkeyid == EVP_PKEY_DSA) { | |
c48ffbcc | 1530 | SSLfatal(s, SSL_AD_ILLEGAL_PARAMETER, SSL_R_WRONG_SIGNATURE_TYPE); |
5a8916d9 DSH |
1531 | return 0; |
1532 | } | |
1533 | /* Only allow PSS for TLS 1.3 */ | |
1534 | if (pkeyid == EVP_PKEY_RSA) | |
1535 | pkeyid = EVP_PKEY_RSA_PSS; | |
1536 | } | |
263ff2c9 | 1537 | lu = tls1_lookup_sigalg(s, sig); |
f742cda8 | 1538 | /* |
d8311fc9 MC |
1539 | * Check sigalgs is known. Disallow SHA1/SHA224 with TLS 1.3. Check key type |
1540 | * is consistent with signature: RSA keys can be used for RSA-PSS | |
f742cda8 | 1541 | */ |
d8311fc9 MC |
1542 | if (lu == NULL |
1543 | || (SSL_IS_TLS13(s) && (lu->hash == NID_sha1 || lu->hash == NID_sha224)) | |
095a982b | 1544 | || (pkeyid != lu->sig |
f742cda8 | 1545 | && (lu->sig != EVP_PKEY_RSA_PSS || pkeyid != EVP_PKEY_RSA))) { |
c48ffbcc | 1546 | SSLfatal(s, SSL_AD_ILLEGAL_PARAMETER, SSL_R_WRONG_SIGNATURE_TYPE); |
0f113f3e MC |
1547 | return 0; |
1548 | } | |
11d2641f | 1549 | /* Check the sigalg is consistent with the key OID */ |
ed576acd | 1550 | if (!ssl_cert_lookup_by_nid(EVP_PKEY_get_id(pkey), &cidx) |
11d2641f | 1551 | || lu->sig_idx != (int)cidx) { |
c48ffbcc | 1552 | SSLfatal(s, SSL_AD_ILLEGAL_PARAMETER, SSL_R_WRONG_SIGNATURE_TYPE); |
11d2641f MC |
1553 | return 0; |
1554 | } | |
1555 | ||
fe3066ee | 1556 | if (pkeyid == EVP_PKEY_EC) { |
44b6318f | 1557 | |
4a1b4280 DSH |
1558 | /* Check point compression is permitted */ |
1559 | if (!tls1_check_pkey_comp(s, pkey)) { | |
f63a17d6 | 1560 | SSLfatal(s, SSL_AD_ILLEGAL_PARAMETER, |
f63a17d6 | 1561 | SSL_R_ILLEGAL_POINT_COMPRESSION); |
4a1b4280 DSH |
1562 | return 0; |
1563 | } | |
1564 | ||
1565 | /* For TLS 1.3 or Suite B check curve matches signature algorithm */ | |
1566 | if (SSL_IS_TLS13(s) || tls1_suiteb(s)) { | |
d8975dec | 1567 | int curve = ssl_get_EC_curve_nid(pkey); |
4a1b4280 | 1568 | |
a34a9df0 | 1569 | if (lu->curve != NID_undef && curve != lu->curve) { |
c48ffbcc | 1570 | SSLfatal(s, SSL_AD_ILLEGAL_PARAMETER, SSL_R_WRONG_CURVE); |
8f88cb53 DSH |
1571 | return 0; |
1572 | } | |
4a1b4280 DSH |
1573 | } |
1574 | if (!SSL_IS_TLS13(s)) { | |
1575 | /* Check curve matches extensions */ | |
dcf8b01f | 1576 | if (!tls1_check_group_id(s, tls1_get_group_id(pkey), 1)) { |
c48ffbcc | 1577 | SSLfatal(s, SSL_AD_ILLEGAL_PARAMETER, SSL_R_WRONG_CURVE); |
8f88cb53 DSH |
1578 | return 0; |
1579 | } | |
8f88cb53 | 1580 | if (tls1_suiteb(s)) { |
f1adb006 DSH |
1581 | /* Check sigalg matches a permissible Suite B value */ |
1582 | if (sig != TLSEXT_SIGALG_ecdsa_secp256r1_sha256 | |
1583 | && sig != TLSEXT_SIGALG_ecdsa_secp384r1_sha384) { | |
f63a17d6 | 1584 | SSLfatal(s, SSL_AD_HANDSHAKE_FAILURE, |
f63a17d6 | 1585 | SSL_R_WRONG_SIGNATURE_TYPE); |
0f113f3e | 1586 | return 0; |
f1adb006 | 1587 | } |
8f88cb53 | 1588 | } |
0f113f3e | 1589 | } |
8f88cb53 | 1590 | } else if (tls1_suiteb(s)) { |
c48ffbcc | 1591 | SSLfatal(s, SSL_AD_HANDSHAKE_FAILURE, SSL_R_WRONG_SIGNATURE_TYPE); |
0f113f3e | 1592 | return 0; |
8f88cb53 | 1593 | } |
0f113f3e MC |
1594 | |
1595 | /* Check signature matches a type we sent */ | |
a9669ddc | 1596 | sent_sigslen = tls12_get_psigalgs(s, 1, &sent_sigs); |
536199ec | 1597 | for (i = 0; i < sent_sigslen; i++, sent_sigs++) { |
703bcee0 | 1598 | if (sig == *sent_sigs) |
0f113f3e MC |
1599 | break; |
1600 | } | |
1601 | /* Allow fallback to SHA1 if not strict mode */ | |
f742cda8 DSH |
1602 | if (i == sent_sigslen && (lu->hash != NID_sha1 |
1603 | || s->cert->cert_flags & SSL_CERT_FLAGS_CHECK_TLS_STRICT)) { | |
c48ffbcc | 1604 | SSLfatal(s, SSL_AD_HANDSHAKE_FAILURE, SSL_R_WRONG_SIGNATURE_TYPE); |
0f113f3e MC |
1605 | return 0; |
1606 | } | |
c8f6c28a | 1607 | if (!tls1_lookup_md(s->ctx, lu, &md)) { |
c48ffbcc | 1608 | SSLfatal(s, SSL_AD_HANDSHAKE_FAILURE, SSL_R_UNKNOWN_DIGEST); |
f63a17d6 | 1609 | return 0; |
0f113f3e | 1610 | } |
620c97b6 KR |
1611 | /* |
1612 | * Make sure security callback allows algorithm. For historical | |
1613 | * reasons we have to pass the sigalg as a two byte char array. | |
1614 | */ | |
1615 | sigalgstr[0] = (sig >> 8) & 0xff; | |
1616 | sigalgstr[1] = sig & 0xff; | |
1617 | secbits = sigalg_security_bits(s->ctx, lu); | |
1618 | if (secbits == 0 || | |
1619 | !ssl_security(s, SSL_SECOP_SIGALG_CHECK, secbits, | |
ed576acd | 1620 | md != NULL ? EVP_MD_get_type(md) : NID_undef, |
620c97b6 | 1621 | (void *)sigalgstr)) { |
c48ffbcc | 1622 | SSLfatal(s, SSL_AD_HANDSHAKE_FAILURE, SSL_R_WRONG_SIGNATURE_TYPE); |
620c97b6 | 1623 | return 0; |
0f113f3e | 1624 | } |
6cbebb55 | 1625 | /* Store the sigalg the peer uses */ |
555cbb32 | 1626 | s->s3.tmp.peer_sigalg = lu; |
0f113f3e MC |
1627 | return 1; |
1628 | } | |
2ea80354 | 1629 | |
42ef7aea DSH |
1630 | int SSL_get_peer_signature_type_nid(const SSL *s, int *pnid) |
1631 | { | |
555cbb32 | 1632 | if (s->s3.tmp.peer_sigalg == NULL) |
42ef7aea | 1633 | return 0; |
555cbb32 | 1634 | *pnid = s->s3.tmp.peer_sigalg->sig; |
42ef7aea DSH |
1635 | return 1; |
1636 | } | |
1637 | ||
a51c9f63 VD |
1638 | int SSL_get_signature_type_nid(const SSL *s, int *pnid) |
1639 | { | |
555cbb32 | 1640 | if (s->s3.tmp.sigalg == NULL) |
a51c9f63 | 1641 | return 0; |
555cbb32 | 1642 | *pnid = s->s3.tmp.sigalg->sig; |
a51c9f63 VD |
1643 | return 1; |
1644 | } | |
1645 | ||
0f113f3e | 1646 | /* |
3eb2aff4 KR |
1647 | * Set a mask of disabled algorithms: an algorithm is disabled if it isn't |
1648 | * supported, doesn't appear in supported signature algorithms, isn't supported | |
1649 | * by the enabled protocol versions or by the security level. | |
1650 | * | |
1651 | * This function should only be used for checking which ciphers are supported | |
1652 | * by the client. | |
1653 | * | |
1654 | * Call ssl_cipher_disabled() to check that it's enabled or not. | |
b7bfe69b | 1655 | */ |
1d0c08b4 | 1656 | int ssl_set_client_disabled(SSL *s) |
0f113f3e | 1657 | { |
555cbb32 TS |
1658 | s->s3.tmp.mask_a = 0; |
1659 | s->s3.tmp.mask_k = 0; | |
1660 | ssl_set_sig_mask(&s->s3.tmp.mask_a, s, SSL_SECOP_SIGALG_MASK); | |
1661 | if (ssl_get_min_max_version(s, &s->s3.tmp.min_ver, | |
1662 | &s->s3.tmp.max_ver, NULL) != 0) | |
1d0c08b4 | 1663 | return 0; |
a230b26e | 1664 | #ifndef OPENSSL_NO_PSK |
0f113f3e MC |
1665 | /* with PSK there must be client callback set */ |
1666 | if (!s->psk_client_callback) { | |
555cbb32 TS |
1667 | s->s3.tmp.mask_a |= SSL_aPSK; |
1668 | s->s3.tmp.mask_k |= SSL_PSK; | |
0f113f3e | 1669 | } |
a230b26e | 1670 | #endif /* OPENSSL_NO_PSK */ |
e481f9b9 | 1671 | #ifndef OPENSSL_NO_SRP |
0f113f3e | 1672 | if (!(s->srp_ctx.srp_Mask & SSL_kSRP)) { |
555cbb32 TS |
1673 | s->s3.tmp.mask_a |= SSL_aSRP; |
1674 | s->s3.tmp.mask_k |= SSL_kSRP; | |
0f113f3e | 1675 | } |
e481f9b9 | 1676 | #endif |
1d0c08b4 | 1677 | return 1; |
0f113f3e | 1678 | } |
fc101f88 | 1679 | |
3eb2aff4 KR |
1680 | /* |
1681 | * ssl_cipher_disabled - check that a cipher is disabled or not | |
1682 | * @s: SSL connection that you want to use the cipher on | |
1683 | * @c: cipher to check | |
1684 | * @op: Security check that you want to do | |
8af91fd9 | 1685 | * @ecdhe: If set to 1 then TLSv1 ECDHE ciphers are also allowed in SSLv3 |
3eb2aff4 KR |
1686 | * |
1687 | * Returns 1 when it's disabled, 0 when enabled. | |
1688 | */ | |
b0031e5d | 1689 | int ssl_cipher_disabled(const SSL *s, const SSL_CIPHER *c, int op, int ecdhe) |
0f113f3e | 1690 | { |
555cbb32 TS |
1691 | if (c->algorithm_mkey & s->s3.tmp.mask_k |
1692 | || c->algorithm_auth & s->s3.tmp.mask_a) | |
0f113f3e | 1693 | return 1; |
555cbb32 | 1694 | if (s->s3.tmp.max_ver == 0) |
3eb2aff4 | 1695 | return 1; |
8af91fd9 MC |
1696 | if (!SSL_IS_DTLS(s)) { |
1697 | int min_tls = c->min_tls; | |
1698 | ||
1699 | /* | |
1700 | * For historical reasons we will allow ECHDE to be selected by a server | |
1701 | * in SSLv3 if we are a client | |
1702 | */ | |
1703 | if (min_tls == TLS1_VERSION && ecdhe | |
1704 | && (c->algorithm_mkey & (SSL_kECDHE | SSL_kECDHEPSK)) != 0) | |
1705 | min_tls = SSL3_VERSION; | |
1706 | ||
555cbb32 | 1707 | if ((min_tls > s->s3.tmp.max_ver) || (c->max_tls < s->s3.tmp.min_ver)) |
8af91fd9 MC |
1708 | return 1; |
1709 | } | |
555cbb32 TS |
1710 | if (SSL_IS_DTLS(s) && (DTLS_VERSION_GT(c->min_dtls, s->s3.tmp.max_ver) |
1711 | || DTLS_VERSION_LT(c->max_dtls, s->s3.tmp.min_ver))) | |
3eb2aff4 KR |
1712 | return 1; |
1713 | ||
0f113f3e MC |
1714 | return !ssl_security(s, op, c->strength_bits, 0, (void *)c); |
1715 | } | |
b362ccab | 1716 | |
7da160b0 | 1717 | int tls_use_ticket(SSL *s) |
0f113f3e | 1718 | { |
08191294 | 1719 | if ((s->options & SSL_OP_NO_TICKET)) |
0f113f3e MC |
1720 | return 0; |
1721 | return ssl_security(s, SSL_SECOP_TICKET, 0, 0, NULL); | |
1722 | } | |
ed3883d2 | 1723 | |
e469af8d | 1724 | int tls1_set_server_sigalgs(SSL *s) |
0f113f3e | 1725 | { |
0f113f3e | 1726 | size_t i; |
8483a003 F |
1727 | |
1728 | /* Clear any shared signature algorithms */ | |
29948ac8 BK |
1729 | OPENSSL_free(s->shared_sigalgs); |
1730 | s->shared_sigalgs = NULL; | |
1731 | s->shared_sigalgslen = 0; | |
9195ddcd DSH |
1732 | /* Clear certificate validity flags */ |
1733 | for (i = 0; i < SSL_PKEY_NUM; i++) | |
555cbb32 | 1734 | s->s3.tmp.valid_flags[i] = 0; |
a8bb912d DSH |
1735 | /* |
1736 | * If peer sent no signature algorithms check to see if we support | |
1737 | * the default algorithm for each certificate type | |
1738 | */ | |
555cbb32 TS |
1739 | if (s->s3.tmp.peer_cert_sigalgs == NULL |
1740 | && s->s3.tmp.peer_sigalgs == NULL) { | |
a8bb912d DSH |
1741 | const uint16_t *sent_sigs; |
1742 | size_t sent_sigslen = tls12_get_psigalgs(s, 1, &sent_sigs); | |
0f113f3e | 1743 | |
a8bb912d DSH |
1744 | for (i = 0; i < SSL_PKEY_NUM; i++) { |
1745 | const SIGALG_LOOKUP *lu = tls1_get_legacy_sigalg(s, i); | |
1746 | size_t j; | |
1747 | ||
1748 | if (lu == NULL) | |
1749 | continue; | |
1750 | /* Check default matches a type we sent */ | |
1751 | for (j = 0; j < sent_sigslen; j++) { | |
1752 | if (lu->sigalg == sent_sigs[j]) { | |
555cbb32 | 1753 | s->s3.tmp.valid_flags[i] = CERT_PKEY_SIGN; |
a8bb912d DSH |
1754 | break; |
1755 | } | |
1756 | } | |
1757 | } | |
9195ddcd | 1758 | return 1; |
a8bb912d | 1759 | } |
9195ddcd DSH |
1760 | |
1761 | if (!tls1_process_sigalgs(s)) { | |
c48ffbcc | 1762 | SSLfatal(s, SSL_AD_INTERNAL_ERROR, ERR_R_INTERNAL_ERROR); |
f63a17d6 | 1763 | return 0; |
d376e57d | 1764 | } |
29948ac8 | 1765 | if (s->shared_sigalgs != NULL) |
9195ddcd | 1766 | return 1; |
f63a17d6 | 1767 | |
fb34a0f4 | 1768 | /* Fatal error if no shared signature algorithms */ |
c48ffbcc | 1769 | SSLfatal(s, SSL_AD_HANDSHAKE_FAILURE, |
f63a17d6 | 1770 | SSL_R_NO_SHARED_SIGNATURE_ALGORITHMS); |
0f113f3e MC |
1771 | return 0; |
1772 | } | |
e469af8d | 1773 | |
1d97c843 | 1774 | /*- |
1ab3836b | 1775 | * Gets the ticket information supplied by the client if any. |
e7f0d921 | 1776 | * |
1ab3836b | 1777 | * hello: The parsed ClientHello data |
c519e89f BM |
1778 | * ret: (output) on return, if a ticket was decrypted, then this is set to |
1779 | * point to the resulting session. | |
6434abbf | 1780 | */ |
61fb5923 | 1781 | SSL_TICKET_STATUS tls_get_ticket_from_client(SSL *s, CLIENTHELLO_MSG *hello, |
df0fed9a | 1782 | SSL_SESSION **ret) |
0f113f3e | 1783 | { |
1ab3836b MC |
1784 | size_t size; |
1785 | RAW_EXTENSION *ticketext; | |
e7f0d921 | 1786 | |
0f113f3e | 1787 | *ret = NULL; |
aff8c126 | 1788 | s->ext.ticket_expected = 0; |
0f113f3e MC |
1789 | |
1790 | /* | |
9362c93e MC |
1791 | * If tickets disabled or not supported by the protocol version |
1792 | * (e.g. TLSv1.3) behave as if no ticket present to permit stateful | |
0f113f3e MC |
1793 | * resumption. |
1794 | */ | |
1ab3836b | 1795 | if (s->version <= SSL3_VERSION || !tls_use_ticket(s)) |
df0fed9a | 1796 | return SSL_TICKET_NONE; |
9ceb2426 | 1797 | |
70af3d8e MC |
1798 | ticketext = &hello->pre_proc_exts[TLSEXT_IDX_session_ticket]; |
1799 | if (!ticketext->present) | |
df0fed9a | 1800 | return SSL_TICKET_NONE; |
1ab3836b MC |
1801 | |
1802 | size = PACKET_remaining(&ticketext->data); | |
70af3d8e | 1803 | |
c0638ade | 1804 | return tls_decrypt_ticket(s, PACKET_data(&ticketext->data), size, |
70af3d8e | 1805 | hello->session_id, hello->session_id_len, ret); |
1ab3836b MC |
1806 | } |
1807 | ||
1d97c843 TH |
1808 | /*- |
1809 | * tls_decrypt_ticket attempts to decrypt a session ticket. | |
c519e89f | 1810 | * |
61fb5923 MC |
1811 | * If s->tls_session_secret_cb is set and we're not doing TLSv1.3 then we are |
1812 | * expecting a pre-shared key ciphersuite, in which case we have no use for | |
1813 | * session tickets and one will never be decrypted, nor will | |
1814 | * s->ext.ticket_expected be set to 1. | |
1815 | * | |
1816 | * Side effects: | |
1817 | * Sets s->ext.ticket_expected to 1 if the server will have to issue | |
1818 | * a new session ticket to the client because the client indicated support | |
1819 | * (and s->tls_session_secret_cb is NULL) but the client either doesn't have | |
1820 | * a session ticket or we couldn't use the one it gave us, or if | |
1821 | * s->ctx->ext.ticket_key_cb asked to renew the client's ticket. | |
1822 | * Otherwise, s->ext.ticket_expected is set to 0. | |
1823 | * | |
c519e89f | 1824 | * etick: points to the body of the session ticket extension. |
8483a003 | 1825 | * eticklen: the length of the session tickets extension. |
c519e89f BM |
1826 | * sess_id: points at the session ID. |
1827 | * sesslen: the length of the session ID. | |
1828 | * psess: (output) on return, if a ticket was decrypted, then this is set to | |
1829 | * point to the resulting session. | |
c519e89f | 1830 | */ |
61fb5923 | 1831 | SSL_TICKET_STATUS tls_decrypt_ticket(SSL *s, const unsigned char *etick, |
df0fed9a TS |
1832 | size_t eticklen, const unsigned char *sess_id, |
1833 | size_t sesslen, SSL_SESSION **psess) | |
0f113f3e | 1834 | { |
61fb5923 | 1835 | SSL_SESSION *sess = NULL; |
0f113f3e MC |
1836 | unsigned char *sdec; |
1837 | const unsigned char *p; | |
ddf6ec00 | 1838 | int slen, renew_ticket = 0, declen; |
61fb5923 | 1839 | SSL_TICKET_STATUS ret = SSL_TICKET_FATAL_ERR_OTHER; |
348240c6 | 1840 | size_t mlen; |
0f113f3e | 1841 | unsigned char tick_hmac[EVP_MAX_MD_SIZE]; |
a76ce286 | 1842 | SSL_HMAC *hctx = NULL; |
ee763495 | 1843 | EVP_CIPHER_CTX *ctx = NULL; |
222da979 | 1844 | SSL_CTX *tctx = s->session_ctx; |
e97763c9 | 1845 | |
61fb5923 MC |
1846 | if (eticklen == 0) { |
1847 | /* | |
1848 | * The client will accept a ticket but doesn't currently have | |
1849 | * one (TLSv1.2 and below), or treated as a fatal error in TLSv1.3 | |
1850 | */ | |
1851 | ret = SSL_TICKET_EMPTY; | |
1852 | goto end; | |
1853 | } | |
1854 | if (!SSL_IS_TLS13(s) && s->ext.session_secret_cb) { | |
1855 | /* | |
1856 | * Indicate that the ticket couldn't be decrypted rather than | |
1857 | * generating the session from ticket now, trigger | |
1858 | * abbreviated handshake based on external mechanism to | |
1859 | * calculate the master secret later. | |
1860 | */ | |
1861 | ret = SSL_TICKET_NO_DECRYPT; | |
1862 | goto end; | |
1863 | } | |
1864 | ||
ee763495 MC |
1865 | /* Need at least keyname + iv */ |
1866 | if (eticklen < TLSEXT_KEYNAME_LENGTH + EVP_MAX_IV_LENGTH) { | |
df0fed9a | 1867 | ret = SSL_TICKET_NO_DECRYPT; |
c0638ade | 1868 | goto end; |
ee763495 MC |
1869 | } |
1870 | ||
0f113f3e | 1871 | /* Initialize session ticket encryption and HMAC contexts */ |
a76ce286 | 1872 | hctx = ssl_hmac_new(tctx); |
c0638ade MC |
1873 | if (hctx == NULL) { |
1874 | ret = SSL_TICKET_FATAL_ERR_MALLOC; | |
1875 | goto end; | |
1876 | } | |
846ec07d | 1877 | ctx = EVP_CIPHER_CTX_new(); |
35b1a433 | 1878 | if (ctx == NULL) { |
df0fed9a | 1879 | ret = SSL_TICKET_FATAL_ERR_MALLOC; |
c0638ade | 1880 | goto end; |
35b1a433 | 1881 | } |
a76ce286 P |
1882 | #ifndef OPENSSL_NO_DEPRECATED_3_0 |
1883 | if (tctx->ext.ticket_key_evp_cb != NULL || tctx->ext.ticket_key_cb != NULL) | |
1884 | #else | |
1885 | if (tctx->ext.ticket_key_evp_cb != NULL) | |
1886 | #endif | |
1887 | { | |
0f113f3e | 1888 | unsigned char *nctick = (unsigned char *)etick; |
a76ce286 P |
1889 | int rv = 0; |
1890 | ||
1891 | if (tctx->ext.ticket_key_evp_cb != NULL) | |
1892 | rv = tctx->ext.ticket_key_evp_cb(s, nctick, | |
1893 | nctick + TLSEXT_KEYNAME_LENGTH, | |
1894 | ctx, | |
1895 | ssl_hmac_get0_EVP_MAC_CTX(hctx), | |
1896 | 0); | |
1897 | #ifndef OPENSSL_NO_DEPRECATED_3_0 | |
1898 | else if (tctx->ext.ticket_key_cb != NULL) | |
1899 | /* if 0 is returned, write an empty ticket */ | |
1900 | rv = tctx->ext.ticket_key_cb(s, nctick, | |
ee763495 | 1901 | nctick + TLSEXT_KEYNAME_LENGTH, |
a76ce286 P |
1902 | ctx, ssl_hmac_get0_HMAC_CTX(hctx), 0); |
1903 | #endif | |
c0638ade MC |
1904 | if (rv < 0) { |
1905 | ret = SSL_TICKET_FATAL_ERR_OTHER; | |
1906 | goto end; | |
1907 | } | |
35b1a433 | 1908 | if (rv == 0) { |
df0fed9a | 1909 | ret = SSL_TICKET_NO_DECRYPT; |
c0638ade | 1910 | goto end; |
35b1a433 | 1911 | } |
0f113f3e MC |
1912 | if (rv == 2) |
1913 | renew_ticket = 1; | |
1914 | } else { | |
148bfd26 MC |
1915 | EVP_CIPHER *aes256cbc = NULL; |
1916 | ||
0f113f3e | 1917 | /* Check key name matches */ |
aff8c126 | 1918 | if (memcmp(etick, tctx->ext.tick_key_name, |
ee763495 | 1919 | TLSEXT_KEYNAME_LENGTH) != 0) { |
df0fed9a | 1920 | ret = SSL_TICKET_NO_DECRYPT; |
c0638ade | 1921 | goto end; |
35b1a433 | 1922 | } |
148bfd26 MC |
1923 | |
1924 | aes256cbc = EVP_CIPHER_fetch(s->ctx->libctx, "AES-256-CBC", | |
1925 | s->ctx->propq); | |
1926 | if (aes256cbc == NULL | |
1927 | || ssl_hmac_init(hctx, tctx->ext.secure->tick_hmac_key, | |
1928 | sizeof(tctx->ext.secure->tick_hmac_key), | |
1929 | "SHA256") <= 0 | |
1930 | || EVP_DecryptInit_ex(ctx, aes256cbc, NULL, | |
4bfb96f2 | 1931 | tctx->ext.secure->tick_aes_key, |
ee763495 | 1932 | etick + TLSEXT_KEYNAME_LENGTH) <= 0) { |
148bfd26 | 1933 | EVP_CIPHER_free(aes256cbc); |
c0638ade MC |
1934 | ret = SSL_TICKET_FATAL_ERR_OTHER; |
1935 | goto end; | |
a230b26e | 1936 | } |
148bfd26 | 1937 | EVP_CIPHER_free(aes256cbc); |
c0638ade MC |
1938 | if (SSL_IS_TLS13(s)) |
1939 | renew_ticket = 1; | |
0f113f3e MC |
1940 | } |
1941 | /* | |
1942 | * Attempt to process session ticket, first conduct sanity and integrity | |
1943 | * checks on ticket. | |
1944 | */ | |
a76ce286 | 1945 | mlen = ssl_hmac_size(hctx); |
348240c6 | 1946 | if (mlen == 0) { |
c0638ade MC |
1947 | ret = SSL_TICKET_FATAL_ERR_OTHER; |
1948 | goto end; | |
0f113f3e | 1949 | } |
c0638ade | 1950 | |
e97763c9 DSH |
1951 | /* Sanity check ticket length: must exceed keyname + IV + HMAC */ |
1952 | if (eticklen <= | |
ed576acd | 1953 | TLSEXT_KEYNAME_LENGTH + EVP_CIPHER_CTX_get_iv_length(ctx) + mlen) { |
df0fed9a | 1954 | ret = SSL_TICKET_NO_DECRYPT; |
c0638ade | 1955 | goto end; |
e97763c9 | 1956 | } |
0f113f3e MC |
1957 | eticklen -= mlen; |
1958 | /* Check HMAC of encrypted ticket */ | |
a76ce286 P |
1959 | if (ssl_hmac_update(hctx, etick, eticklen) <= 0 |
1960 | || ssl_hmac_final(hctx, tick_hmac, NULL, sizeof(tick_hmac)) <= 0) { | |
c0638ade MC |
1961 | ret = SSL_TICKET_FATAL_ERR_OTHER; |
1962 | goto end; | |
5f3d93e4 | 1963 | } |
c0638ade | 1964 | |
0f113f3e | 1965 | if (CRYPTO_memcmp(tick_hmac, etick + eticklen, mlen)) { |
c0638ade MC |
1966 | ret = SSL_TICKET_NO_DECRYPT; |
1967 | goto end; | |
0f113f3e MC |
1968 | } |
1969 | /* Attempt to decrypt session data */ | |
1970 | /* Move p after IV to start of encrypted ticket, update length */ | |
ed576acd TM |
1971 | p = etick + TLSEXT_KEYNAME_LENGTH + EVP_CIPHER_CTX_get_iv_length(ctx); |
1972 | eticklen -= TLSEXT_KEYNAME_LENGTH + EVP_CIPHER_CTX_get_iv_length(ctx); | |
0f113f3e | 1973 | sdec = OPENSSL_malloc(eticklen); |
348240c6 MC |
1974 | if (sdec == NULL || EVP_DecryptUpdate(ctx, sdec, &slen, p, |
1975 | (int)eticklen) <= 0) { | |
d1247df2 | 1976 | OPENSSL_free(sdec); |
c0638ade MC |
1977 | ret = SSL_TICKET_FATAL_ERR_OTHER; |
1978 | goto end; | |
0f113f3e | 1979 | } |
348240c6 | 1980 | if (EVP_DecryptFinal(ctx, sdec + slen, &declen) <= 0) { |
0f113f3e | 1981 | OPENSSL_free(sdec); |
c0638ade MC |
1982 | ret = SSL_TICKET_NO_DECRYPT; |
1983 | goto end; | |
0f113f3e | 1984 | } |
348240c6 | 1985 | slen += declen; |
0f113f3e MC |
1986 | p = sdec; |
1987 | ||
1988 | sess = d2i_SSL_SESSION(NULL, &p, slen); | |
d3bc9805 | 1989 | slen -= p - sdec; |
0f113f3e MC |
1990 | OPENSSL_free(sdec); |
1991 | if (sess) { | |
79020b27 | 1992 | /* Some additional consistency checks */ |
32305f88 | 1993 | if (slen != 0) { |
79020b27 | 1994 | SSL_SESSION_free(sess); |
5f96a95e | 1995 | sess = NULL; |
c0638ade MC |
1996 | ret = SSL_TICKET_NO_DECRYPT; |
1997 | goto end; | |
79020b27 | 1998 | } |
0f113f3e MC |
1999 | /* |
2000 | * The session ID, if non-empty, is used by some clients to detect | |
2001 | * that the ticket has been accepted. So we copy it to the session | |
2002 | * structure. If it is empty set length to zero as required by | |
2003 | * standard. | |
2004 | */ | |
32305f88 | 2005 | if (sesslen) { |
0f113f3e | 2006 | memcpy(sess->session_id, sess_id, sesslen); |
32305f88 MC |
2007 | sess->session_id_length = sesslen; |
2008 | } | |
0f113f3e | 2009 | if (renew_ticket) |
c0638ade | 2010 | ret = SSL_TICKET_SUCCESS_RENEW; |
0f113f3e | 2011 | else |
c0638ade MC |
2012 | ret = SSL_TICKET_SUCCESS; |
2013 | goto end; | |
0f113f3e MC |
2014 | } |
2015 | ERR_clear_error(); | |
2016 | /* | |
2017 | * For session parse failure, indicate that we need to send a new ticket. | |
2018 | */ | |
c0638ade MC |
2019 | ret = SSL_TICKET_NO_DECRYPT; |
2020 | ||
2021 | end: | |
846ec07d | 2022 | EVP_CIPHER_CTX_free(ctx); |
a76ce286 | 2023 | ssl_hmac_free(hctx); |
c0638ade MC |
2024 | |
2025 | /* | |
61fb5923 MC |
2026 | * If set, the decrypt_ticket_cb() is called unless a fatal error was |
2027 | * detected above. The callback is responsible for checking |ret| before it | |
2028 | * performs any action | |
c0638ade | 2029 | */ |
61fb5923 MC |
2030 | if (s->session_ctx->decrypt_ticket_cb != NULL |
2031 | && (ret == SSL_TICKET_EMPTY | |
2032 | || ret == SSL_TICKET_NO_DECRYPT | |
2033 | || ret == SSL_TICKET_SUCCESS | |
2034 | || ret == SSL_TICKET_SUCCESS_RENEW)) { | |
c0638ade | 2035 | size_t keyname_len = eticklen; |
61fb5923 | 2036 | int retcb; |
c0638ade MC |
2037 | |
2038 | if (keyname_len > TLSEXT_KEYNAME_LENGTH) | |
2039 | keyname_len = TLSEXT_KEYNAME_LENGTH; | |
61fb5923 MC |
2040 | retcb = s->session_ctx->decrypt_ticket_cb(s, sess, etick, keyname_len, |
2041 | ret, | |
2042 | s->session_ctx->ticket_cb_data); | |
2043 | switch (retcb) { | |
2044 | case SSL_TICKET_RETURN_ABORT: | |
2045 | ret = SSL_TICKET_FATAL_ERR_OTHER; | |
2046 | break; | |
2047 | ||
2048 | case SSL_TICKET_RETURN_IGNORE: | |
2049 | ret = SSL_TICKET_NONE; | |
2050 | SSL_SESSION_free(sess); | |
2051 | sess = NULL; | |
2052 | break; | |
2053 | ||
2054 | case SSL_TICKET_RETURN_IGNORE_RENEW: | |
2055 | if (ret != SSL_TICKET_EMPTY && ret != SSL_TICKET_NO_DECRYPT) | |
2056 | ret = SSL_TICKET_NO_DECRYPT; | |
2057 | /* else the value of |ret| will already do the right thing */ | |
2058 | SSL_SESSION_free(sess); | |
2059 | sess = NULL; | |
2060 | break; | |
2061 | ||
2062 | case SSL_TICKET_RETURN_USE: | |
2063 | case SSL_TICKET_RETURN_USE_RENEW: | |
2064 | if (ret != SSL_TICKET_SUCCESS | |
2065 | && ret != SSL_TICKET_SUCCESS_RENEW) | |
2066 | ret = SSL_TICKET_FATAL_ERR_OTHER; | |
2067 | else if (retcb == SSL_TICKET_RETURN_USE) | |
2068 | ret = SSL_TICKET_SUCCESS; | |
2069 | else | |
2070 | ret = SSL_TICKET_SUCCESS_RENEW; | |
2071 | break; | |
2072 | ||
2073 | default: | |
2074 | ret = SSL_TICKET_FATAL_ERR_OTHER; | |
2075 | } | |
c0638ade MC |
2076 | } |
2077 | ||
309371d6 MC |
2078 | if (s->ext.session_secret_cb == NULL || SSL_IS_TLS13(s)) { |
2079 | switch (ret) { | |
2080 | case SSL_TICKET_NO_DECRYPT: | |
2081 | case SSL_TICKET_SUCCESS_RENEW: | |
2082 | case SSL_TICKET_EMPTY: | |
2083 | s->ext.ticket_expected = 1; | |
2084 | } | |
c0638ade MC |
2085 | } |
2086 | ||
61fb5923 MC |
2087 | *psess = sess; |
2088 | ||
2089 | return ret; | |
0f113f3e | 2090 | } |
6434abbf | 2091 | |
b362ccab | 2092 | /* Check to see if a signature algorithm is allowed */ |
b0031e5d | 2093 | static int tls12_sigalg_allowed(const SSL *s, int op, const SIGALG_LOOKUP *lu) |
0f113f3e | 2094 | { |
703bcee0 | 2095 | unsigned char sigalgstr[2]; |
44b6318f | 2096 | int secbits; |
703bcee0 | 2097 | |
263ff2c9 | 2098 | if (lu == NULL || !lu->enabled) |
0f113f3e | 2099 | return 0; |
224b4e37 DSH |
2100 | /* DSA is not allowed in TLS 1.3 */ |
2101 | if (SSL_IS_TLS13(s) && lu->sig == EVP_PKEY_DSA) | |
2102 | return 0; | |
08cea586 MC |
2103 | /* |
2104 | * At some point we should fully axe DSA/etc. in ClientHello as per TLS 1.3 | |
2105 | * spec | |
2106 | */ | |
555cbb32 | 2107 | if (!s->server && !SSL_IS_DTLS(s) && s->s3.tmp.min_ver >= TLS1_3_VERSION |
6ffeb269 BK |
2108 | && (lu->sig == EVP_PKEY_DSA || lu->hash_idx == SSL_MD_SHA1_IDX |
2109 | || lu->hash_idx == SSL_MD_MD5_IDX | |
2110 | || lu->hash_idx == SSL_MD_SHA224_IDX)) | |
2111 | return 0; | |
871980a9 | 2112 | |
0f113f3e | 2113 | /* See if public key algorithm allowed */ |
a68eee67 | 2114 | if (ssl_cert_is_disabled(s->ctx, lu->sig_idx)) |
0f113f3e | 2115 | return 0; |
871980a9 MC |
2116 | |
2117 | if (lu->sig == NID_id_GostR3410_2012_256 | |
2118 | || lu->sig == NID_id_GostR3410_2012_512 | |
2119 | || lu->sig == NID_id_GostR3410_2001) { | |
2120 | /* We never allow GOST sig algs on the server with TLSv1.3 */ | |
2121 | if (s->server && SSL_IS_TLS13(s)) | |
2122 | return 0; | |
2123 | if (!s->server | |
2124 | && s->method->version == TLS_ANY_VERSION | |
555cbb32 | 2125 | && s->s3.tmp.max_ver >= TLS1_3_VERSION) { |
871980a9 MC |
2126 | int i, num; |
2127 | STACK_OF(SSL_CIPHER) *sk; | |
2128 | ||
2129 | /* | |
2130 | * We're a client that could negotiate TLSv1.3. We only allow GOST | |
2131 | * sig algs if we could negotiate TLSv1.2 or below and we have GOST | |
2132 | * ciphersuites enabled. | |
2133 | */ | |
2134 | ||
555cbb32 | 2135 | if (s->s3.tmp.min_ver >= TLS1_3_VERSION) |
871980a9 MC |
2136 | return 0; |
2137 | ||
2138 | sk = SSL_get_ciphers(s); | |
2139 | num = sk != NULL ? sk_SSL_CIPHER_num(sk) : 0; | |
2140 | for (i = 0; i < num; i++) { | |
2141 | const SSL_CIPHER *c; | |
2142 | ||
2143 | c = sk_SSL_CIPHER_value(sk, i); | |
2144 | /* Skip disabled ciphers */ | |
2145 | if (ssl_cipher_disabled(s, c, SSL_SECOP_CIPHER_SUPPORTED, 0)) | |
2146 | continue; | |
2147 | ||
5a5530a2 | 2148 | if ((c->algorithm_mkey & (SSL_kGOST | SSL_kGOST18)) != 0) |
871980a9 MC |
2149 | break; |
2150 | } | |
2151 | if (i == num) | |
2152 | return 0; | |
2153 | } | |
2154 | } | |
2155 | ||
0f113f3e | 2156 | /* Finally see if security callback allows it */ |
620c97b6 | 2157 | secbits = sigalg_security_bits(s->ctx, lu); |
b0e9ab95 DSH |
2158 | sigalgstr[0] = (lu->sigalg >> 8) & 0xff; |
2159 | sigalgstr[1] = lu->sigalg & 0xff; | |
44b6318f | 2160 | return ssl_security(s, op, secbits, lu->hash, (void *)sigalgstr); |
0f113f3e MC |
2161 | } |
2162 | ||
2163 | /* | |
2164 | * Get a mask of disabled public key algorithms based on supported signature | |
2165 | * algorithms. For example if no signature algorithm supports RSA then RSA is | |
2166 | * disabled. | |
b362ccab DSH |
2167 | */ |
2168 | ||
90d9e49a | 2169 | void ssl_set_sig_mask(uint32_t *pmask_a, SSL *s, int op) |
0f113f3e | 2170 | { |
98c792d1 | 2171 | const uint16_t *sigalgs; |
0f113f3e | 2172 | size_t i, sigalgslen; |
13cc2574 | 2173 | uint32_t disabled_mask = SSL_aRSA | SSL_aDSS | SSL_aECDSA; |
0f113f3e | 2174 | /* |
13cc2574 DSH |
2175 | * Go through all signature algorithms seeing if we support any |
2176 | * in disabled_mask. | |
0f113f3e | 2177 | */ |
a9669ddc | 2178 | sigalgslen = tls12_get_psigalgs(s, 1, &sigalgs); |
b2555168 | 2179 | for (i = 0; i < sigalgslen; i++, sigalgs++) { |
263ff2c9 | 2180 | const SIGALG_LOOKUP *lu = tls1_lookup_sigalg(s, *sigalgs); |
13cc2574 | 2181 | const SSL_CERT_LOOKUP *clu; |
b0e9ab95 DSH |
2182 | |
2183 | if (lu == NULL) | |
2184 | continue; | |
13cc2574 DSH |
2185 | |
2186 | clu = ssl_cert_lookup_by_idx(lu->sig_idx); | |
dd6b2706 P |
2187 | if (clu == NULL) |
2188 | continue; | |
13cc2574 DSH |
2189 | |
2190 | /* If algorithm is disabled see if we can enable it */ | |
2191 | if ((clu->amask & disabled_mask) != 0 | |
2192 | && tls12_sigalg_allowed(s, op, lu)) | |
2193 | disabled_mask &= ~clu->amask; | |
0f113f3e | 2194 | } |
13cc2574 | 2195 | *pmask_a |= disabled_mask; |
0f113f3e | 2196 | } |
b362ccab | 2197 | |
ae2f7b37 | 2198 | int tls12_copy_sigalgs(SSL *s, WPACKET *pkt, |
98c792d1 | 2199 | const uint16_t *psig, size_t psiglen) |
2c7b4dbc MC |
2200 | { |
2201 | size_t i; | |
b0e9ab95 | 2202 | int rv = 0; |
c0f9e23c | 2203 | |
703bcee0 | 2204 | for (i = 0; i < psiglen; i++, psig++) { |
263ff2c9 | 2205 | const SIGALG_LOOKUP *lu = tls1_lookup_sigalg(s, *psig); |
b0e9ab95 | 2206 | |
54e3efff MC |
2207 | if (lu == NULL |
2208 | || !tls12_sigalg_allowed(s, SSL_SECOP_SIGALG_SUPPORTED, lu)) | |
b0e9ab95 DSH |
2209 | continue; |
2210 | if (!WPACKET_put_bytes_u16(pkt, *psig)) | |
2211 | return 0; | |
2212 | /* | |
2213 | * If TLS 1.3 must have at least one valid TLS 1.3 message | |
d8311fc9 | 2214 | * signing algorithm: i.e. neither RSA nor SHA1/SHA224 |
b0e9ab95 DSH |
2215 | */ |
2216 | if (rv == 0 && (!SSL_IS_TLS13(s) | |
d8311fc9 MC |
2217 | || (lu->sig != EVP_PKEY_RSA |
2218 | && lu->hash != NID_sha1 | |
2219 | && lu->hash != NID_sha224))) | |
b0e9ab95 | 2220 | rv = 1; |
2c7b4dbc | 2221 | } |
5528d68f | 2222 | if (rv == 0) |
6849b73c | 2223 | ERR_raise(ERR_LIB_SSL, SSL_R_NO_SUITABLE_SIGNATURE_ALGORITHM); |
b0e9ab95 | 2224 | return rv; |
2c7b4dbc MC |
2225 | } |
2226 | ||
4453cd8c | 2227 | /* Given preference and allowed sigalgs set shared sigalgs */ |
4d43ee28 | 2228 | static size_t tls12_shared_sigalgs(SSL *s, const SIGALG_LOOKUP **shsig, |
98c792d1 DSH |
2229 | const uint16_t *pref, size_t preflen, |
2230 | const uint16_t *allow, size_t allowlen) | |
0f113f3e | 2231 | { |
98c792d1 | 2232 | const uint16_t *ptmp, *atmp; |
0f113f3e | 2233 | size_t i, j, nmatch = 0; |
703bcee0 | 2234 | for (i = 0, ptmp = pref; i < preflen; i++, ptmp++) { |
263ff2c9 | 2235 | const SIGALG_LOOKUP *lu = tls1_lookup_sigalg(s, *ptmp); |
b0e9ab95 | 2236 | |
0f113f3e | 2237 | /* Skip disabled hashes or signature algorithms */ |
54e3efff MC |
2238 | if (lu == NULL |
2239 | || !tls12_sigalg_allowed(s, SSL_SECOP_SIGALG_SHARED, lu)) | |
0f113f3e | 2240 | continue; |
703bcee0 MC |
2241 | for (j = 0, atmp = allow; j < allowlen; j++, atmp++) { |
2242 | if (*ptmp == *atmp) { | |
0f113f3e | 2243 | nmatch++; |
b0e9ab95 DSH |
2244 | if (shsig) |
2245 | *shsig++ = lu; | |
0f113f3e MC |
2246 | break; |
2247 | } | |
2248 | } | |
2249 | } | |
2250 | return nmatch; | |
2251 | } | |
4453cd8c DSH |
2252 | |
2253 | /* Set shared signature algorithms for SSL structures */ | |
2254 | static int tls1_set_shared_sigalgs(SSL *s) | |
0f113f3e | 2255 | { |
98c792d1 | 2256 | const uint16_t *pref, *allow, *conf; |
0f113f3e MC |
2257 | size_t preflen, allowlen, conflen; |
2258 | size_t nmatch; | |
4d43ee28 | 2259 | const SIGALG_LOOKUP **salgs = NULL; |
0f113f3e MC |
2260 | CERT *c = s->cert; |
2261 | unsigned int is_suiteb = tls1_suiteb(s); | |
b548a1f1 | 2262 | |
29948ac8 BK |
2263 | OPENSSL_free(s->shared_sigalgs); |
2264 | s->shared_sigalgs = NULL; | |
2265 | s->shared_sigalgslen = 0; | |
0f113f3e MC |
2266 | /* If client use client signature algorithms if not NULL */ |
2267 | if (!s->server && c->client_sigalgs && !is_suiteb) { | |
2268 | conf = c->client_sigalgs; | |
2269 | conflen = c->client_sigalgslen; | |
2270 | } else if (c->conf_sigalgs && !is_suiteb) { | |
2271 | conf = c->conf_sigalgs; | |
2272 | conflen = c->conf_sigalgslen; | |
2273 | } else | |
a9669ddc | 2274 | conflen = tls12_get_psigalgs(s, 0, &conf); |
0f113f3e MC |
2275 | if (s->options & SSL_OP_CIPHER_SERVER_PREFERENCE || is_suiteb) { |
2276 | pref = conf; | |
2277 | preflen = conflen; | |
555cbb32 TS |
2278 | allow = s->s3.tmp.peer_sigalgs; |
2279 | allowlen = s->s3.tmp.peer_sigalgslen; | |
0f113f3e MC |
2280 | } else { |
2281 | allow = conf; | |
2282 | allowlen = conflen; | |
555cbb32 TS |
2283 | pref = s->s3.tmp.peer_sigalgs; |
2284 | preflen = s->s3.tmp.peer_sigalgslen; | |
0f113f3e MC |
2285 | } |
2286 | nmatch = tls12_shared_sigalgs(s, NULL, pref, preflen, allow, allowlen); | |
34e3edbf | 2287 | if (nmatch) { |
cdb10bae | 2288 | if ((salgs = OPENSSL_malloc(nmatch * sizeof(*salgs))) == NULL) { |
6849b73c | 2289 | ERR_raise(ERR_LIB_SSL, ERR_R_MALLOC_FAILURE); |
34e3edbf | 2290 | return 0; |
cdb10bae | 2291 | } |
34e3edbf DSH |
2292 | nmatch = tls12_shared_sigalgs(s, salgs, pref, preflen, allow, allowlen); |
2293 | } else { | |
2294 | salgs = NULL; | |
2295 | } | |
29948ac8 BK |
2296 | s->shared_sigalgs = salgs; |
2297 | s->shared_sigalgslen = nmatch; | |
0f113f3e MC |
2298 | return 1; |
2299 | } | |
4453cd8c | 2300 | |
9e84a42d | 2301 | int tls1_save_u16(PACKET *pkt, uint16_t **pdest, size_t *pdestlen) |
0f113f3e | 2302 | { |
98c792d1 | 2303 | unsigned int stmp; |
703bcee0 | 2304 | size_t size, i; |
9e84a42d | 2305 | uint16_t *buf; |
0f113f3e | 2306 | |
703bcee0 MC |
2307 | size = PACKET_remaining(pkt); |
2308 | ||
2309 | /* Invalid data length */ | |
8f12296e | 2310 | if (size == 0 || (size & 1) != 0) |
703bcee0 MC |
2311 | return 0; |
2312 | ||
2313 | size >>= 1; | |
2314 | ||
cdb10bae | 2315 | if ((buf = OPENSSL_malloc(size * sizeof(*buf))) == NULL) { |
6849b73c | 2316 | ERR_raise(ERR_LIB_SSL, ERR_R_MALLOC_FAILURE); |
0f113f3e | 2317 | return 0; |
cdb10bae | 2318 | } |
98c792d1 | 2319 | for (i = 0; i < size && PACKET_get_net_2(pkt, &stmp); i++) |
9e84a42d | 2320 | buf[i] = stmp; |
703bcee0 | 2321 | |
9e84a42d DSH |
2322 | if (i != size) { |
2323 | OPENSSL_free(buf); | |
703bcee0 | 2324 | return 0; |
9e84a42d DSH |
2325 | } |
2326 | ||
2327 | OPENSSL_free(*pdest); | |
2328 | *pdest = buf; | |
2329 | *pdestlen = size; | |
703bcee0 | 2330 | |
0f113f3e MC |
2331 | return 1; |
2332 | } | |
6b7be581 | 2333 | |
c589c34e | 2334 | int tls1_save_sigalgs(SSL *s, PACKET *pkt, int cert) |
9e84a42d DSH |
2335 | { |
2336 | /* Extension ignored for inappropriate versions */ | |
2337 | if (!SSL_USE_SIGALGS(s)) | |
2338 | return 1; | |
2339 | /* Should never happen */ | |
2340 | if (s->cert == NULL) | |
2341 | return 0; | |
2342 | ||
c589c34e | 2343 | if (cert) |
555cbb32 TS |
2344 | return tls1_save_u16(pkt, &s->s3.tmp.peer_cert_sigalgs, |
2345 | &s->s3.tmp.peer_cert_sigalgslen); | |
c589c34e | 2346 | else |
555cbb32 TS |
2347 | return tls1_save_u16(pkt, &s->s3.tmp.peer_sigalgs, |
2348 | &s->s3.tmp.peer_sigalgslen); | |
9e84a42d | 2349 | |
9e84a42d DSH |
2350 | } |
2351 | ||
2352 | /* Set preferred digest for each key type */ | |
2353 | ||
c800c27a | 2354 | int tls1_process_sigalgs(SSL *s) |
0f113f3e | 2355 | { |
0f113f3e | 2356 | size_t i; |
555cbb32 | 2357 | uint32_t *pvalid = s->s3.tmp.valid_flags; |
4d43ee28 | 2358 | |
0f113f3e MC |
2359 | if (!tls1_set_shared_sigalgs(s)) |
2360 | return 0; | |
2361 | ||
9195ddcd DSH |
2362 | for (i = 0; i < SSL_PKEY_NUM; i++) |
2363 | pvalid[i] = 0; | |
2364 | ||
29948ac8 BK |
2365 | for (i = 0; i < s->shared_sigalgslen; i++) { |
2366 | const SIGALG_LOOKUP *sigptr = s->shared_sigalgs[i]; | |
9195ddcd | 2367 | int idx = sigptr->sig_idx; |
4d43ee28 | 2368 | |
523fb323 | 2369 | /* Ignore PKCS1 based sig algs in TLSv1.3 */ |
4d43ee28 | 2370 | if (SSL_IS_TLS13(s) && sigptr->sig == EVP_PKEY_RSA) |
523fb323 | 2371 | continue; |
9195ddcd | 2372 | /* If not disabled indicate we can explicitly sign */ |
a68eee67 | 2373 | if (pvalid[idx] == 0 && !ssl_cert_is_disabled(s->ctx, idx)) |
b8858aec | 2374 | pvalid[idx] = CERT_PKEY_EXPLICIT_SIGN | CERT_PKEY_SIGN; |
0f113f3e MC |
2375 | } |
2376 | return 1; | |
2377 | } | |
4817504d | 2378 | |
e7f8ff43 | 2379 | int SSL_get_sigalgs(SSL *s, int idx, |
0f113f3e MC |
2380 | int *psign, int *phash, int *psignhash, |
2381 | unsigned char *rsig, unsigned char *rhash) | |
2382 | { | |
555cbb32 TS |
2383 | uint16_t *psig = s->s3.tmp.peer_sigalgs; |
2384 | size_t numsigalgs = s->s3.tmp.peer_sigalgslen; | |
348240c6 | 2385 | if (psig == NULL || numsigalgs > INT_MAX) |
0f113f3e MC |
2386 | return 0; |
2387 | if (idx >= 0) { | |
4d43ee28 DSH |
2388 | const SIGALG_LOOKUP *lu; |
2389 | ||
703bcee0 | 2390 | if (idx >= (int)numsigalgs) |
0f113f3e MC |
2391 | return 0; |
2392 | psig += idx; | |
4d43ee28 | 2393 | if (rhash != NULL) |
536199ec | 2394 | *rhash = (unsigned char)((*psig >> 8) & 0xff); |
4d43ee28 | 2395 | if (rsig != NULL) |
536199ec | 2396 | *rsig = (unsigned char)(*psig & 0xff); |
263ff2c9 | 2397 | lu = tls1_lookup_sigalg(s, *psig); |
4d43ee28 DSH |
2398 | if (psign != NULL) |
2399 | *psign = lu != NULL ? lu->sig : NID_undef; | |
2400 | if (phash != NULL) | |
2401 | *phash = lu != NULL ? lu->hash : NID_undef; | |
2402 | if (psignhash != NULL) | |
2403 | *psignhash = lu != NULL ? lu->sigandhash : NID_undef; | |
0f113f3e | 2404 | } |
348240c6 | 2405 | return (int)numsigalgs; |
0f113f3e | 2406 | } |
4453cd8c DSH |
2407 | |
2408 | int SSL_get_shared_sigalgs(SSL *s, int idx, | |
0f113f3e MC |
2409 | int *psign, int *phash, int *psignhash, |
2410 | unsigned char *rsig, unsigned char *rhash) | |
2411 | { | |
4d43ee28 | 2412 | const SIGALG_LOOKUP *shsigalgs; |
29948ac8 | 2413 | if (s->shared_sigalgs == NULL |
6d047e06 | 2414 | || idx < 0 |
29948ac8 BK |
2415 | || idx >= (int)s->shared_sigalgslen |
2416 | || s->shared_sigalgslen > INT_MAX) | |
0f113f3e | 2417 | return 0; |
29948ac8 | 2418 | shsigalgs = s->shared_sigalgs[idx]; |
4d43ee28 DSH |
2419 | if (phash != NULL) |
2420 | *phash = shsigalgs->hash; | |
2421 | if (psign != NULL) | |
2422 | *psign = shsigalgs->sig; | |
2423 | if (psignhash != NULL) | |
2424 | *psignhash = shsigalgs->sigandhash; | |
2425 | if (rsig != NULL) | |
2426 | *rsig = (unsigned char)(shsigalgs->sigalg & 0xff); | |
2427 | if (rhash != NULL) | |
2428 | *rhash = (unsigned char)((shsigalgs->sigalg >> 8) & 0xff); | |
29948ac8 | 2429 | return (int)s->shared_sigalgslen; |
0f113f3e MC |
2430 | } |
2431 | ||
787ebcaf DSH |
2432 | /* Maximum possible number of unique entries in sigalgs array */ |
2433 | #define TLS_MAX_SIGALGCNT (OSSL_NELEM(sigalg_lookup_tbl) * 2) | |
0f229cce | 2434 | |
0f113f3e MC |
2435 | typedef struct { |
2436 | size_t sigalgcnt; | |
fd5e1a8c BK |
2437 | /* TLSEXT_SIGALG_XXX values */ |
2438 | uint16_t sigalgs[TLS_MAX_SIGALGCNT]; | |
0f113f3e | 2439 | } sig_cb_st; |
0f229cce | 2440 | |
431f458d DSH |
2441 | static void get_sigorhash(int *psig, int *phash, const char *str) |
2442 | { | |
2443 | if (strcmp(str, "RSA") == 0) { | |
2444 | *psig = EVP_PKEY_RSA; | |
b2eb6998 DSH |
2445 | } else if (strcmp(str, "RSA-PSS") == 0 || strcmp(str, "PSS") == 0) { |
2446 | *psig = EVP_PKEY_RSA_PSS; | |
431f458d DSH |
2447 | } else if (strcmp(str, "DSA") == 0) { |
2448 | *psig = EVP_PKEY_DSA; | |
2449 | } else if (strcmp(str, "ECDSA") == 0) { | |
2450 | *psig = EVP_PKEY_EC; | |
2451 | } else { | |
2452 | *phash = OBJ_sn2nid(str); | |
2453 | if (*phash == NID_undef) | |
2454 | *phash = OBJ_ln2nid(str); | |
2455 | } | |
2456 | } | |
787ebcaf DSH |
2457 | /* Maximum length of a signature algorithm string component */ |
2458 | #define TLS_MAX_SIGSTRING_LEN 40 | |
431f458d | 2459 | |
0f229cce | 2460 | static int sig_cb(const char *elem, int len, void *arg) |
0f113f3e MC |
2461 | { |
2462 | sig_cb_st *sarg = arg; | |
2463 | size_t i; | |
fd5e1a8c | 2464 | const SIGALG_LOOKUP *s; |
787ebcaf | 2465 | char etmp[TLS_MAX_SIGSTRING_LEN], *p; |
431f458d | 2466 | int sig_alg = NID_undef, hash_alg = NID_undef; |
2747d73c KR |
2467 | if (elem == NULL) |
2468 | return 0; | |
787ebcaf | 2469 | if (sarg->sigalgcnt == TLS_MAX_SIGALGCNT) |
0f113f3e MC |
2470 | return 0; |
2471 | if (len > (int)(sizeof(etmp) - 1)) | |
2472 | return 0; | |
2473 | memcpy(etmp, elem, len); | |
2474 | etmp[len] = 0; | |
2475 | p = strchr(etmp, '+'); | |
fd5e1a8c BK |
2476 | /* |
2477 | * We only allow SignatureSchemes listed in the sigalg_lookup_tbl; | |
2478 | * if there's no '+' in the provided name, look for the new-style combined | |
2479 | * name. If not, match both sig+hash to find the needed SIGALG_LOOKUP. | |
2480 | * Just sig+hash is not unique since TLS 1.3 adds rsa_pss_pss_* and | |
2481 | * rsa_pss_rsae_* that differ only by public key OID; in such cases | |
2482 | * we will pick the _rsae_ variant, by virtue of them appearing earlier | |
2483 | * in the table. | |
2484 | */ | |
8a43a42a | 2485 | if (p == NULL) { |
8a43a42a DSH |
2486 | for (i = 0, s = sigalg_lookup_tbl; i < OSSL_NELEM(sigalg_lookup_tbl); |
2487 | i++, s++) { | |
2488 | if (s->name != NULL && strcmp(etmp, s->name) == 0) { | |
fd5e1a8c | 2489 | sarg->sigalgs[sarg->sigalgcnt++] = s->sigalg; |
8a43a42a DSH |
2490 | break; |
2491 | } | |
2492 | } | |
fd5e1a8c BK |
2493 | if (i == OSSL_NELEM(sigalg_lookup_tbl)) |
2494 | return 0; | |
8a43a42a DSH |
2495 | } else { |
2496 | *p = 0; | |
2497 | p++; | |
2498 | if (*p == 0) | |
2499 | return 0; | |
2500 | get_sigorhash(&sig_alg, &hash_alg, etmp); | |
2501 | get_sigorhash(&sig_alg, &hash_alg, p); | |
fd5e1a8c BK |
2502 | if (sig_alg == NID_undef || hash_alg == NID_undef) |
2503 | return 0; | |
2504 | for (i = 0, s = sigalg_lookup_tbl; i < OSSL_NELEM(sigalg_lookup_tbl); | |
2505 | i++, s++) { | |
2506 | if (s->hash == hash_alg && s->sig == sig_alg) { | |
2507 | sarg->sigalgs[sarg->sigalgcnt++] = s->sigalg; | |
2508 | break; | |
2509 | } | |
2510 | } | |
2511 | if (i == OSSL_NELEM(sigalg_lookup_tbl)) | |
2512 | return 0; | |
8a43a42a | 2513 | } |
0f113f3e | 2514 | |
fd5e1a8c BK |
2515 | /* Reject duplicates */ |
2516 | for (i = 0; i < sarg->sigalgcnt - 1; i++) { | |
c1acef92 | 2517 | if (sarg->sigalgs[i] == sarg->sigalgs[sarg->sigalgcnt - 1]) { |
fd5e1a8c | 2518 | sarg->sigalgcnt--; |
0f113f3e | 2519 | return 0; |
fd5e1a8c | 2520 | } |
0f113f3e | 2521 | } |
0f113f3e MC |
2522 | return 1; |
2523 | } | |
2524 | ||
2525 | /* | |
9d22666e | 2526 | * Set supported signature algorithms based on a colon separated list of the |
0f113f3e MC |
2527 | * form sig+hash e.g. RSA+SHA512:DSA+SHA512 |
2528 | */ | |
3dbc46df | 2529 | int tls1_set_sigalgs_list(CERT *c, const char *str, int client) |
0f113f3e MC |
2530 | { |
2531 | sig_cb_st sig; | |
2532 | sig.sigalgcnt = 0; | |
2533 | if (!CONF_parse_list(str, ':', 1, sig_cb, &sig)) | |
2534 | return 0; | |
2535 | if (c == NULL) | |
2536 | return 1; | |
fd5e1a8c BK |
2537 | return tls1_set_raw_sigalgs(c, sig.sigalgs, sig.sigalgcnt, client); |
2538 | } | |
2539 | ||
2540 | int tls1_set_raw_sigalgs(CERT *c, const uint16_t *psigs, size_t salglen, | |
2541 | int client) | |
2542 | { | |
2543 | uint16_t *sigalgs; | |
2544 | ||
cdb10bae | 2545 | if ((sigalgs = OPENSSL_malloc(salglen * sizeof(*sigalgs))) == NULL) { |
6849b73c | 2546 | ERR_raise(ERR_LIB_SSL, ERR_R_MALLOC_FAILURE); |
fd5e1a8c | 2547 | return 0; |
cdb10bae | 2548 | } |
fd5e1a8c BK |
2549 | memcpy(sigalgs, psigs, salglen * sizeof(*sigalgs)); |
2550 | ||
2551 | if (client) { | |
2552 | OPENSSL_free(c->client_sigalgs); | |
2553 | c->client_sigalgs = sigalgs; | |
2554 | c->client_sigalgslen = salglen; | |
2555 | } else { | |
2556 | OPENSSL_free(c->conf_sigalgs); | |
2557 | c->conf_sigalgs = sigalgs; | |
2558 | c->conf_sigalgslen = salglen; | |
2559 | } | |
2560 | ||
2561 | return 1; | |
0f113f3e MC |
2562 | } |
2563 | ||
a230b26e | 2564 | int tls1_set_sigalgs(CERT *c, const int *psig_nids, size_t salglen, int client) |
0f113f3e | 2565 | { |
98c792d1 | 2566 | uint16_t *sigalgs, *sptr; |
0f113f3e | 2567 | size_t i; |
63c1df09 | 2568 | |
0f113f3e MC |
2569 | if (salglen & 1) |
2570 | return 0; | |
cdb10bae | 2571 | if ((sigalgs = OPENSSL_malloc((salglen / 2) * sizeof(*sigalgs))) == NULL) { |
6849b73c | 2572 | ERR_raise(ERR_LIB_SSL, ERR_R_MALLOC_FAILURE); |
0f113f3e | 2573 | return 0; |
cdb10bae | 2574 | } |
0f113f3e | 2575 | for (i = 0, sptr = sigalgs; i < salglen; i += 2) { |
63c1df09 | 2576 | size_t j; |
7a531ee4 | 2577 | const SIGALG_LOOKUP *curr; |
63c1df09 MC |
2578 | int md_id = *psig_nids++; |
2579 | int sig_id = *psig_nids++; | |
2580 | ||
2581 | for (j = 0, curr = sigalg_lookup_tbl; j < OSSL_NELEM(sigalg_lookup_tbl); | |
2582 | j++, curr++) { | |
fe3066ee | 2583 | if (curr->hash == md_id && curr->sig == sig_id) { |
63c1df09 MC |
2584 | *sptr++ = curr->sigalg; |
2585 | break; | |
2586 | } | |
2587 | } | |
0f113f3e | 2588 | |
63c1df09 | 2589 | if (j == OSSL_NELEM(sigalg_lookup_tbl)) |
0f113f3e | 2590 | goto err; |
0f113f3e MC |
2591 | } |
2592 | ||
2593 | if (client) { | |
b548a1f1 | 2594 | OPENSSL_free(c->client_sigalgs); |
0f113f3e | 2595 | c->client_sigalgs = sigalgs; |
7a531ee4 | 2596 | c->client_sigalgslen = salglen / 2; |
0f113f3e | 2597 | } else { |
b548a1f1 | 2598 | OPENSSL_free(c->conf_sigalgs); |
0f113f3e | 2599 | c->conf_sigalgs = sigalgs; |
7a531ee4 | 2600 | c->conf_sigalgslen = salglen / 2; |
0f113f3e MC |
2601 | } |
2602 | ||
2603 | return 1; | |
2604 | ||
2605 | err: | |
2606 | OPENSSL_free(sigalgs); | |
2607 | return 0; | |
2608 | } | |
4453cd8c | 2609 | |
29948ac8 | 2610 | static int tls1_check_sig_alg(SSL *s, X509 *x, int default_nid) |
0f113f3e | 2611 | { |
5235ef44 | 2612 | int sig_nid, use_pc_sigalgs = 0; |
0f113f3e | 2613 | size_t i; |
5235ef44 MC |
2614 | const SIGALG_LOOKUP *sigalg; |
2615 | size_t sigalgslen; | |
0f113f3e MC |
2616 | if (default_nid == -1) |
2617 | return 1; | |
2618 | sig_nid = X509_get_signature_nid(x); | |
2619 | if (default_nid) | |
2620 | return sig_nid == default_nid ? 1 : 0; | |
5235ef44 MC |
2621 | |
2622 | if (SSL_IS_TLS13(s) && s->s3.tmp.peer_cert_sigalgs != NULL) { | |
2623 | /* | |
2624 | * If we're in TLSv1.3 then we only get here if we're checking the | |
2625 | * chain. If the peer has specified peer_cert_sigalgs then we use them | |
2626 | * otherwise we default to normal sigalgs. | |
2627 | */ | |
2628 | sigalgslen = s->s3.tmp.peer_cert_sigalgslen; | |
2629 | use_pc_sigalgs = 1; | |
2630 | } else { | |
2631 | sigalgslen = s->shared_sigalgslen; | |
2632 | } | |
2633 | for (i = 0; i < sigalgslen; i++) { | |
2634 | sigalg = use_pc_sigalgs | |
263ff2c9 | 2635 | ? tls1_lookup_sigalg(s, s->s3.tmp.peer_cert_sigalgs[i]) |
5235ef44 | 2636 | : s->shared_sigalgs[i]; |
a87f3fe0 | 2637 | if (sigalg != NULL && sig_nid == sigalg->sigandhash) |
0f113f3e | 2638 | return 1; |
5235ef44 | 2639 | } |
0f113f3e MC |
2640 | return 0; |
2641 | } | |
2642 | ||
6dbb6219 DSH |
2643 | /* Check to see if a certificate issuer name matches list of CA names */ |
2644 | static int ssl_check_ca_name(STACK_OF(X509_NAME) *names, X509 *x) | |
0f113f3e | 2645 | { |
8cc86b81 | 2646 | const X509_NAME *nm; |
0f113f3e MC |
2647 | int i; |
2648 | nm = X509_get_issuer_name(x); | |
2649 | for (i = 0; i < sk_X509_NAME_num(names); i++) { | |
2650 | if (!X509_NAME_cmp(nm, sk_X509_NAME_value(names, i))) | |
2651 | return 1; | |
2652 | } | |
2653 | return 0; | |
2654 | } | |
2655 | ||
2656 | /* | |
2657 | * Check certificate chain is consistent with TLS extensions and is usable by | |
2658 | * server. This servers two purposes: it allows users to check chains before | |
2659 | * passing them to the server and it allows the server to check chains before | |
2660 | * attempting to use them. | |
d61ff83b | 2661 | */ |
6dbb6219 | 2662 | |
69687aa8 | 2663 | /* Flags which need to be set for a certificate when strict mode not set */ |
6dbb6219 | 2664 | |
e481f9b9 | 2665 | #define CERT_PKEY_VALID_FLAGS \ |
0f113f3e | 2666 | (CERT_PKEY_EE_SIGNATURE|CERT_PKEY_EE_PARAM) |
6dbb6219 | 2667 | /* Strict mode flags */ |
e481f9b9 | 2668 | #define CERT_PKEY_STRICT_FLAGS \ |
0f113f3e MC |
2669 | (CERT_PKEY_VALID_FLAGS|CERT_PKEY_CA_SIGNATURE|CERT_PKEY_CA_PARAM \ |
2670 | | CERT_PKEY_ISSUER_NAME|CERT_PKEY_CERT_TYPE) | |
6dbb6219 | 2671 | |
d61ff83b | 2672 | int tls1_check_chain(SSL *s, X509 *x, EVP_PKEY *pk, STACK_OF(X509) *chain, |
0f113f3e MC |
2673 | int idx) |
2674 | { | |
2675 | int i; | |
2676 | int rv = 0; | |
2677 | int check_flags = 0, strict_mode; | |
2678 | CERT_PKEY *cpk = NULL; | |
2679 | CERT *c = s->cert; | |
f7d53487 | 2680 | uint32_t *pvalid; |
0f113f3e MC |
2681 | unsigned int suiteb_flags = tls1_suiteb(s); |
2682 | /* idx == -1 means checking server chains */ | |
2683 | if (idx != -1) { | |
2684 | /* idx == -2 means checking client certificate chains */ | |
2685 | if (idx == -2) { | |
2686 | cpk = c->key; | |
348240c6 | 2687 | idx = (int)(cpk - c->pkeys); |
0f113f3e MC |
2688 | } else |
2689 | cpk = c->pkeys + idx; | |
555cbb32 | 2690 | pvalid = s->s3.tmp.valid_flags + idx; |
0f113f3e MC |
2691 | x = cpk->x509; |
2692 | pk = cpk->privatekey; | |
2693 | chain = cpk->chain; | |
2694 | strict_mode = c->cert_flags & SSL_CERT_FLAGS_CHECK_TLS_STRICT; | |
2695 | /* If no cert or key, forget it */ | |
2696 | if (!x || !pk) | |
2697 | goto end; | |
0f113f3e | 2698 | } else { |
52fd27f9 DSH |
2699 | size_t certidx; |
2700 | ||
0f113f3e | 2701 | if (!x || !pk) |
d813f9eb | 2702 | return 0; |
52fd27f9 DSH |
2703 | |
2704 | if (ssl_cert_lookup_by_pkey(pk, &certidx) == NULL) | |
d813f9eb | 2705 | return 0; |
52fd27f9 | 2706 | idx = certidx; |
555cbb32 | 2707 | pvalid = s->s3.tmp.valid_flags + idx; |
6383d316 | 2708 | |
0f113f3e MC |
2709 | if (c->cert_flags & SSL_CERT_FLAGS_CHECK_TLS_STRICT) |
2710 | check_flags = CERT_PKEY_STRICT_FLAGS; | |
2711 | else | |
2712 | check_flags = CERT_PKEY_VALID_FLAGS; | |
2713 | strict_mode = 1; | |
2714 | } | |
2715 | ||
2716 | if (suiteb_flags) { | |
2717 | int ok; | |
2718 | if (check_flags) | |
2719 | check_flags |= CERT_PKEY_SUITEB; | |
2720 | ok = X509_chain_check_suiteb(NULL, x, chain, suiteb_flags); | |
2721 | if (ok == X509_V_OK) | |
2722 | rv |= CERT_PKEY_SUITEB; | |
2723 | else if (!check_flags) | |
2724 | goto end; | |
2725 | } | |
2726 | ||
2727 | /* | |
2728 | * Check all signature algorithms are consistent with signature | |
2729 | * algorithms extension if TLS 1.2 or later and strict mode. | |
2730 | */ | |
2731 | if (TLS1_get_version(s) >= TLS1_2_VERSION && strict_mode) { | |
2732 | int default_nid; | |
536199ec | 2733 | int rsign = 0; |
555cbb32 TS |
2734 | if (s->s3.tmp.peer_cert_sigalgs != NULL |
2735 | || s->s3.tmp.peer_sigalgs != NULL) { | |
0f113f3e MC |
2736 | default_nid = 0; |
2737 | /* If no sigalgs extension use defaults from RFC5246 */ | |
c589c34e | 2738 | } else { |
0f113f3e | 2739 | switch (idx) { |
d0ff28f8 | 2740 | case SSL_PKEY_RSA: |
536199ec | 2741 | rsign = EVP_PKEY_RSA; |
0f113f3e MC |
2742 | default_nid = NID_sha1WithRSAEncryption; |
2743 | break; | |
2744 | ||
2745 | case SSL_PKEY_DSA_SIGN: | |
536199ec | 2746 | rsign = EVP_PKEY_DSA; |
0f113f3e MC |
2747 | default_nid = NID_dsaWithSHA1; |
2748 | break; | |
2749 | ||
2750 | case SSL_PKEY_ECC: | |
536199ec | 2751 | rsign = EVP_PKEY_EC; |
0f113f3e MC |
2752 | default_nid = NID_ecdsa_with_SHA1; |
2753 | break; | |
2754 | ||
e44380a9 | 2755 | case SSL_PKEY_GOST01: |
536199ec | 2756 | rsign = NID_id_GostR3410_2001; |
e44380a9 DB |
2757 | default_nid = NID_id_GostR3411_94_with_GostR3410_2001; |
2758 | break; | |
2759 | ||
2760 | case SSL_PKEY_GOST12_256: | |
536199ec | 2761 | rsign = NID_id_GostR3410_2012_256; |
e44380a9 DB |
2762 | default_nid = NID_id_tc26_signwithdigest_gost3410_2012_256; |
2763 | break; | |
2764 | ||
2765 | case SSL_PKEY_GOST12_512: | |
536199ec | 2766 | rsign = NID_id_GostR3410_2012_512; |
e44380a9 DB |
2767 | default_nid = NID_id_tc26_signwithdigest_gost3410_2012_512; |
2768 | break; | |
2769 | ||
0f113f3e MC |
2770 | default: |
2771 | default_nid = -1; | |
2772 | break; | |
2773 | } | |
2774 | } | |
2775 | /* | |
2776 | * If peer sent no signature algorithms extension and we have set | |
2777 | * preferred signature algorithms check we support sha1. | |
2778 | */ | |
2779 | if (default_nid > 0 && c->conf_sigalgs) { | |
2780 | size_t j; | |
98c792d1 | 2781 | const uint16_t *p = c->conf_sigalgs; |
703bcee0 | 2782 | for (j = 0; j < c->conf_sigalgslen; j++, p++) { |
263ff2c9 | 2783 | const SIGALG_LOOKUP *lu = tls1_lookup_sigalg(s, *p); |
44b6318f DSH |
2784 | |
2785 | if (lu != NULL && lu->hash == NID_sha1 && lu->sig == rsign) | |
0f113f3e MC |
2786 | break; |
2787 | } | |
2788 | if (j == c->conf_sigalgslen) { | |
2789 | if (check_flags) | |
2790 | goto skip_sigs; | |
2791 | else | |
2792 | goto end; | |
2793 | } | |
2794 | } | |
2795 | /* Check signature algorithm of each cert in chain */ | |
5235ef44 MC |
2796 | if (SSL_IS_TLS13(s)) { |
2797 | /* | |
2798 | * We only get here if the application has called SSL_check_chain(), | |
2799 | * so check_flags is always set. | |
2800 | */ | |
2801 | if (find_sig_alg(s, x, pk) != NULL) | |
2802 | rv |= CERT_PKEY_EE_SIGNATURE; | |
2803 | } else if (!tls1_check_sig_alg(s, x, default_nid)) { | |
0f113f3e MC |
2804 | if (!check_flags) |
2805 | goto end; | |
2806 | } else | |
2807 | rv |= CERT_PKEY_EE_SIGNATURE; | |
2808 | rv |= CERT_PKEY_CA_SIGNATURE; | |
2809 | for (i = 0; i < sk_X509_num(chain); i++) { | |
29948ac8 | 2810 | if (!tls1_check_sig_alg(s, sk_X509_value(chain, i), default_nid)) { |
0f113f3e MC |
2811 | if (check_flags) { |
2812 | rv &= ~CERT_PKEY_CA_SIGNATURE; | |
2813 | break; | |
2814 | } else | |
2815 | goto end; | |
2816 | } | |
2817 | } | |
2818 | } | |
2819 | /* Else not TLS 1.2, so mark EE and CA signing algorithms OK */ | |
2820 | else if (check_flags) | |
2821 | rv |= CERT_PKEY_EE_SIGNATURE | CERT_PKEY_CA_SIGNATURE; | |
2822 | skip_sigs: | |
2823 | /* Check cert parameters are consistent */ | |
9195ddcd | 2824 | if (tls1_check_cert_param(s, x, 1)) |
0f113f3e MC |
2825 | rv |= CERT_PKEY_EE_PARAM; |
2826 | else if (!check_flags) | |
2827 | goto end; | |
2828 | if (!s->server) | |
2829 | rv |= CERT_PKEY_CA_PARAM; | |
2830 | /* In strict mode check rest of chain too */ | |
2831 | else if (strict_mode) { | |
2832 | rv |= CERT_PKEY_CA_PARAM; | |
2833 | for (i = 0; i < sk_X509_num(chain); i++) { | |
2834 | X509 *ca = sk_X509_value(chain, i); | |
2835 | if (!tls1_check_cert_param(s, ca, 0)) { | |
2836 | if (check_flags) { | |
2837 | rv &= ~CERT_PKEY_CA_PARAM; | |
2838 | break; | |
2839 | } else | |
2840 | goto end; | |
2841 | } | |
2842 | } | |
2843 | } | |
2844 | if (!s->server && strict_mode) { | |
2845 | STACK_OF(X509_NAME) *ca_dn; | |
2846 | int check_type = 0; | |
c2041da8 RL |
2847 | |
2848 | if (EVP_PKEY_is_a(pk, "RSA")) | |
0f113f3e | 2849 | check_type = TLS_CT_RSA_SIGN; |
c2041da8 | 2850 | else if (EVP_PKEY_is_a(pk, "DSA")) |
0f113f3e | 2851 | check_type = TLS_CT_DSS_SIGN; |
c2041da8 | 2852 | else if (EVP_PKEY_is_a(pk, "EC")) |
0f113f3e | 2853 | check_type = TLS_CT_ECDSA_SIGN; |
c2041da8 | 2854 | |
0f113f3e | 2855 | if (check_type) { |
555cbb32 | 2856 | const uint8_t *ctypes = s->s3.tmp.ctype; |
75c13e78 DSH |
2857 | size_t j; |
2858 | ||
555cbb32 | 2859 | for (j = 0; j < s->s3.tmp.ctype_len; j++, ctypes++) { |
75c13e78 | 2860 | if (*ctypes == check_type) { |
0f113f3e MC |
2861 | rv |= CERT_PKEY_CERT_TYPE; |
2862 | break; | |
2863 | } | |
2864 | } | |
2865 | if (!(rv & CERT_PKEY_CERT_TYPE) && !check_flags) | |
2866 | goto end; | |
75c13e78 | 2867 | } else { |
0f113f3e | 2868 | rv |= CERT_PKEY_CERT_TYPE; |
75c13e78 | 2869 | } |
0f113f3e | 2870 | |
555cbb32 | 2871 | ca_dn = s->s3.tmp.peer_ca_names; |
0f113f3e MC |
2872 | |
2873 | if (!sk_X509_NAME_num(ca_dn)) | |
2874 | rv |= CERT_PKEY_ISSUER_NAME; | |
2875 | ||
2876 | if (!(rv & CERT_PKEY_ISSUER_NAME)) { | |
2877 | if (ssl_check_ca_name(ca_dn, x)) | |
2878 | rv |= CERT_PKEY_ISSUER_NAME; | |
2879 | } | |
2880 | if (!(rv & CERT_PKEY_ISSUER_NAME)) { | |
2881 | for (i = 0; i < sk_X509_num(chain); i++) { | |
2882 | X509 *xtmp = sk_X509_value(chain, i); | |
2883 | if (ssl_check_ca_name(ca_dn, xtmp)) { | |
2884 | rv |= CERT_PKEY_ISSUER_NAME; | |
2885 | break; | |
2886 | } | |
2887 | } | |
2888 | } | |
2889 | if (!check_flags && !(rv & CERT_PKEY_ISSUER_NAME)) | |
2890 | goto end; | |
2891 | } else | |
2892 | rv |= CERT_PKEY_ISSUER_NAME | CERT_PKEY_CERT_TYPE; | |
2893 | ||
2894 | if (!check_flags || (rv & check_flags) == check_flags) | |
2895 | rv |= CERT_PKEY_VALID; | |
2896 | ||
2897 | end: | |
2898 | ||
a8bb912d DSH |
2899 | if (TLS1_get_version(s) >= TLS1_2_VERSION) |
2900 | rv |= *pvalid & (CERT_PKEY_EXPLICIT_SIGN | CERT_PKEY_SIGN); | |
2901 | else | |
0f113f3e MC |
2902 | rv |= CERT_PKEY_SIGN | CERT_PKEY_EXPLICIT_SIGN; |
2903 | ||
2904 | /* | |
2905 | * When checking a CERT_PKEY structure all flags are irrelevant if the | |
2906 | * chain is invalid. | |
2907 | */ | |
2908 | if (!check_flags) { | |
a8bb912d | 2909 | if (rv & CERT_PKEY_VALID) { |
6383d316 | 2910 | *pvalid = rv; |
a8bb912d DSH |
2911 | } else { |
2912 | /* Preserve sign and explicit sign flag, clear rest */ | |
2913 | *pvalid &= CERT_PKEY_EXPLICIT_SIGN | CERT_PKEY_SIGN; | |
0f113f3e MC |
2914 | return 0; |
2915 | } | |
2916 | } | |
2917 | return rv; | |
2918 | } | |
d61ff83b DSH |
2919 | |
2920 | /* Set validity of certificates in an SSL structure */ | |
2921 | void tls1_set_cert_validity(SSL *s) | |
0f113f3e | 2922 | { |
d0ff28f8 | 2923 | tls1_check_chain(s, NULL, NULL, NULL, SSL_PKEY_RSA); |
045d078a | 2924 | tls1_check_chain(s, NULL, NULL, NULL, SSL_PKEY_RSA_PSS_SIGN); |
17dd65e6 | 2925 | tls1_check_chain(s, NULL, NULL, NULL, SSL_PKEY_DSA_SIGN); |
17dd65e6 | 2926 | tls1_check_chain(s, NULL, NULL, NULL, SSL_PKEY_ECC); |
e44380a9 DB |
2927 | tls1_check_chain(s, NULL, NULL, NULL, SSL_PKEY_GOST01); |
2928 | tls1_check_chain(s, NULL, NULL, NULL, SSL_PKEY_GOST12_256); | |
2929 | tls1_check_chain(s, NULL, NULL, NULL, SSL_PKEY_GOST12_512); | |
3d234c9e | 2930 | tls1_check_chain(s, NULL, NULL, NULL, SSL_PKEY_ED25519); |
0e1d6ecf | 2931 | tls1_check_chain(s, NULL, NULL, NULL, SSL_PKEY_ED448); |
0f113f3e MC |
2932 | } |
2933 | ||
69687aa8 | 2934 | /* User level utility function to check a chain is suitable */ |
18d71588 | 2935 | int SSL_check_chain(SSL *s, X509 *x, EVP_PKEY *pk, STACK_OF(X509) *chain) |
0f113f3e MC |
2936 | { |
2937 | return tls1_check_chain(s, x, pk, chain, -1); | |
2938 | } | |
d61ff83b | 2939 | |
091f6074 | 2940 | EVP_PKEY *ssl_get_auto_dh(SSL *s) |
0f113f3e | 2941 | { |
091f6074 MC |
2942 | EVP_PKEY *dhp = NULL; |
2943 | BIGNUM *p; | |
d7b5c648 | 2944 | int dh_secbits = 80, sec_level_bits; |
091f6074 MC |
2945 | EVP_PKEY_CTX *pctx = NULL; |
2946 | OSSL_PARAM_BLD *tmpl = NULL; | |
2947 | OSSL_PARAM *params = NULL; | |
2948 | ||
7646610b HK |
2949 | if (s->cert->dh_tmp_auto != 2) { |
2950 | if (s->s3.tmp.new_cipher->algorithm_auth & (SSL_aNULL | SSL_aPSK)) { | |
2951 | if (s->s3.tmp.new_cipher->strength_bits == 256) | |
2952 | dh_secbits = 128; | |
2953 | else | |
2954 | dh_secbits = 80; | |
2955 | } else { | |
2956 | if (s->s3.tmp.cert == NULL) | |
2957 | return NULL; | |
ed576acd | 2958 | dh_secbits = EVP_PKEY_get_security_bits(s->s3.tmp.cert->privatekey); |
7646610b | 2959 | } |
0f113f3e MC |
2960 | } |
2961 | ||
d7b5c648 P |
2962 | /* Do not pick a prime that is too weak for the current security level */ |
2963 | sec_level_bits = ssl_get_security_level_bits(s, NULL, NULL); | |
2964 | if (dh_secbits < sec_level_bits) | |
2965 | dh_secbits = sec_level_bits; | |
2966 | ||
7646610b HK |
2967 | if (dh_secbits >= 192) |
2968 | p = BN_get_rfc3526_prime_8192(NULL); | |
2969 | else if (dh_secbits >= 152) | |
2970 | p = BN_get_rfc3526_prime_4096(NULL); | |
2971 | else if (dh_secbits >= 128) | |
2972 | p = BN_get_rfc3526_prime_3072(NULL); | |
2973 | else if (dh_secbits >= 112) | |
2974 | p = BN_get_rfc3526_prime_2048(NULL); | |
2975 | else | |
2976 | p = BN_get_rfc2409_prime_1024(NULL); | |
091f6074 MC |
2977 | if (p == NULL) |
2978 | goto err; | |
2979 | ||
2980 | pctx = EVP_PKEY_CTX_new_from_name(s->ctx->libctx, "DH", s->ctx->propq); | |
2981 | if (pctx == NULL | |
2db985b7 | 2982 | || EVP_PKEY_fromdata_init(pctx) != 1) |
091f6074 MC |
2983 | goto err; |
2984 | ||
2985 | tmpl = OSSL_PARAM_BLD_new(); | |
2986 | if (tmpl == NULL | |
2987 | || !OSSL_PARAM_BLD_push_BN(tmpl, OSSL_PKEY_PARAM_FFC_P, p) | |
2988 | || !OSSL_PARAM_BLD_push_uint(tmpl, OSSL_PKEY_PARAM_FFC_G, 2)) | |
2989 | goto err; | |
2990 | ||
2991 | params = OSSL_PARAM_BLD_to_param(tmpl); | |
2db985b7 SL |
2992 | if (params == NULL |
2993 | || EVP_PKEY_fromdata(pctx, &dhp, EVP_PKEY_KEY_PARAMETERS, params) != 1) | |
091f6074 MC |
2994 | goto err; |
2995 | ||
2996 | err: | |
3f883c7c | 2997 | OSSL_PARAM_free(params); |
091f6074 MC |
2998 | OSSL_PARAM_BLD_free(tmpl); |
2999 | EVP_PKEY_CTX_free(pctx); | |
3000 | BN_free(p); | |
7646610b | 3001 | return dhp; |
0f113f3e | 3002 | } |
b362ccab DSH |
3003 | |
3004 | static int ssl_security_cert_key(SSL *s, SSL_CTX *ctx, X509 *x, int op) | |
0f113f3e | 3005 | { |
72245f34 | 3006 | int secbits = -1; |
8382fd3a | 3007 | EVP_PKEY *pkey = X509_get0_pubkey(x); |
0f113f3e | 3008 | if (pkey) { |
72245f34 DSH |
3009 | /* |
3010 | * If no parameters this will return -1 and fail using the default | |
3011 | * security callback for any non-zero security level. This will | |
3012 | * reject keys which omit parameters but this only affects DSA and | |
3013 | * omission of parameters is never (?) done in practice. | |
3014 | */ | |
ed576acd | 3015 | secbits = EVP_PKEY_get_security_bits(pkey); |
72245f34 | 3016 | } |
0f113f3e MC |
3017 | if (s) |
3018 | return ssl_security(s, op, secbits, 0, x); | |
3019 | else | |
3020 | return ssl_ctx_security(ctx, op, secbits, 0, x); | |
3021 | } | |
b362ccab DSH |
3022 | |
3023 | static int ssl_security_cert_sig(SSL *s, SSL_CTX *ctx, X509 *x, int op) | |
0f113f3e MC |
3024 | { |
3025 | /* Lookup signature algorithm digest */ | |
65e89736 | 3026 | int secbits, nid, pknid; |
221c7b55 DSH |
3027 | /* Don't check signature if self signed */ |
3028 | if ((X509_get_extension_flags(x) & EXFLAG_SS) != 0) | |
3029 | return 1; | |
65e89736 DSH |
3030 | if (!X509_get_signature_info(x, &nid, &pknid, &secbits, NULL)) |
3031 | secbits = -1; | |
3032 | /* If digest NID not defined use signature NID */ | |
3033 | if (nid == NID_undef) | |
3034 | nid = pknid; | |
0f113f3e | 3035 | if (s) |
65e89736 | 3036 | return ssl_security(s, op, secbits, nid, x); |
0f113f3e | 3037 | else |
65e89736 | 3038 | return ssl_ctx_security(ctx, op, secbits, nid, x); |
0f113f3e | 3039 | } |
b362ccab DSH |
3040 | |
3041 | int ssl_security_cert(SSL *s, SSL_CTX *ctx, X509 *x, int vfy, int is_ee) | |
0f113f3e MC |
3042 | { |
3043 | if (vfy) | |
3044 | vfy = SSL_SECOP_PEER; | |
3045 | if (is_ee) { | |
3046 | if (!ssl_security_cert_key(s, ctx, x, SSL_SECOP_EE_KEY | vfy)) | |
3047 | return SSL_R_EE_KEY_TOO_SMALL; | |
3048 | } else { | |
3049 | if (!ssl_security_cert_key(s, ctx, x, SSL_SECOP_CA_KEY | vfy)) | |
3050 | return SSL_R_CA_KEY_TOO_SMALL; | |
3051 | } | |
3052 | if (!ssl_security_cert_sig(s, ctx, x, SSL_SECOP_CA_MD | vfy)) | |
3053 | return SSL_R_CA_MD_TOO_WEAK; | |
3054 | return 1; | |
3055 | } | |
3056 | ||
3057 | /* | |
69687aa8 F |
3058 | * Check security of a chain, if |sk| includes the end entity certificate then |
3059 | * |x| is NULL. If |vfy| is 1 then we are verifying a peer chain and not sending | |
0f113f3e | 3060 | * one to the peer. Return values: 1 if ok otherwise error code to use |
b362ccab DSH |
3061 | */ |
3062 | ||
3063 | int ssl_security_cert_chain(SSL *s, STACK_OF(X509) *sk, X509 *x, int vfy) | |
0f113f3e MC |
3064 | { |
3065 | int rv, start_idx, i; | |
3066 | if (x == NULL) { | |
3067 | x = sk_X509_value(sk, 0); | |
dc0ef292 BE |
3068 | if (x == NULL) |
3069 | return ERR_R_INTERNAL_ERROR; | |
0f113f3e MC |
3070 | start_idx = 1; |
3071 | } else | |
3072 | start_idx = 0; | |
3073 | ||
3074 | rv = ssl_security_cert(s, NULL, x, vfy, 1); | |
3075 | if (rv != 1) | |
3076 | return rv; | |
3077 | ||
3078 | for (i = start_idx; i < sk_X509_num(sk); i++) { | |
3079 | x = sk_X509_value(sk, i); | |
3080 | rv = ssl_security_cert(s, NULL, x, vfy, 0); | |
3081 | if (rv != 1) | |
3082 | return rv; | |
3083 | } | |
3084 | return 1; | |
3085 | } | |
93a77f9e | 3086 | |
7f6b466b DSH |
3087 | /* |
3088 | * For TLS 1.2 servers check if we have a certificate which can be used | |
b46867d7 | 3089 | * with the signature algorithm "lu" and return index of certificate. |
7f6b466b DSH |
3090 | */ |
3091 | ||
b46867d7 | 3092 | static int tls12_get_cert_sigalg_idx(const SSL *s, const SIGALG_LOOKUP *lu) |
7f6b466b | 3093 | { |
b46867d7 DSH |
3094 | int sig_idx = lu->sig_idx; |
3095 | const SSL_CERT_LOOKUP *clu = ssl_cert_lookup_by_idx(sig_idx); | |
7f6b466b DSH |
3096 | |
3097 | /* If not recognised or not supported by cipher mask it is not suitable */ | |
b8fef8ee | 3098 | if (clu == NULL |
555cbb32 | 3099 | || (clu->amask & s->s3.tmp.new_cipher->algorithm_auth) == 0 |
b8fef8ee | 3100 | || (clu->nid == EVP_PKEY_RSA_PSS |
555cbb32 | 3101 | && (s->s3.tmp.new_cipher->algorithm_mkey & SSL_kRSA) != 0)) |
b46867d7 DSH |
3102 | return -1; |
3103 | ||
555cbb32 | 3104 | return s->s3.tmp.valid_flags[sig_idx] & CERT_PKEY_VALID ? sig_idx : -1; |
7f6b466b DSH |
3105 | } |
3106 | ||
c589c34e | 3107 | /* |
5235ef44 MC |
3108 | * Checks the given cert against signature_algorithm_cert restrictions sent by |
3109 | * the peer (if any) as well as whether the hash from the sigalg is usable with | |
3110 | * the key. | |
3111 | * Returns true if the cert is usable and false otherwise. | |
c589c34e | 3112 | */ |
5235ef44 MC |
3113 | static int check_cert_usable(SSL *s, const SIGALG_LOOKUP *sig, X509 *x, |
3114 | EVP_PKEY *pkey) | |
c589c34e BK |
3115 | { |
3116 | const SIGALG_LOOKUP *lu; | |
ecbb2fca | 3117 | int mdnid, pknid, supported; |
c589c34e | 3118 | size_t i; |
e9fe0f7e | 3119 | const char *mdname = NULL; |
c589c34e | 3120 | |
b5a27688 | 3121 | /* |
e9fe0f7e | 3122 | * If the given EVP_PKEY cannot support signing with this digest, |
b5a27688 DW |
3123 | * the answer is simply 'no'. |
3124 | */ | |
e9fe0f7e TM |
3125 | if (sig->hash != NID_undef) |
3126 | mdname = OBJ_nid2sn(sig->hash); | |
3127 | supported = EVP_PKEY_digestsign_supports_digest(pkey, s->ctx->libctx, | |
3128 | mdname, | |
3129 | s->ctx->propq); | |
3130 | if (supported <= 0) | |
b5a27688 DW |
3131 | return 0; |
3132 | ||
3133 | /* | |
3134 | * The TLS 1.3 signature_algorithms_cert extension places restrictions | |
3135 | * on the sigalg with which the certificate was signed (by its issuer). | |
3136 | */ | |
555cbb32 | 3137 | if (s->s3.tmp.peer_cert_sigalgs != NULL) { |
b5a27688 DW |
3138 | if (!X509_get_signature_info(x, &mdnid, &pknid, NULL, NULL)) |
3139 | return 0; | |
555cbb32 | 3140 | for (i = 0; i < s->s3.tmp.peer_cert_sigalgslen; i++) { |
263ff2c9 | 3141 | lu = tls1_lookup_sigalg(s, s->s3.tmp.peer_cert_sigalgs[i]); |
b5a27688 | 3142 | if (lu == NULL) |
c589c34e | 3143 | continue; |
ecbb2fca | 3144 | |
5235ef44 | 3145 | /* |
407820c0 | 3146 | * This does not differentiate between the |
b5a27688 DW |
3147 | * rsa_pss_pss_* and rsa_pss_rsae_* schemes since we do not |
3148 | * have a chain here that lets us look at the key OID in the | |
3149 | * signing certificate. | |
5235ef44 | 3150 | */ |
b5a27688 DW |
3151 | if (mdnid == lu->hash && pknid == lu->sig) |
3152 | return 1; | |
c589c34e BK |
3153 | } |
3154 | return 0; | |
3155 | } | |
b5a27688 | 3156 | |
5235ef44 | 3157 | /* |
b5a27688 DW |
3158 | * Without signat_algorithms_cert, any certificate for which we have |
3159 | * a viable public key is permitted. | |
5235ef44 | 3160 | */ |
ecbb2fca | 3161 | return 1; |
c589c34e BK |
3162 | } |
3163 | ||
5235ef44 MC |
3164 | /* |
3165 | * Returns true if |s| has a usable certificate configured for use | |
3166 | * with signature scheme |sig|. | |
3167 | * "Usable" includes a check for presence as well as applying | |
3168 | * the signature_algorithm_cert restrictions sent by the peer (if any). | |
3169 | * Returns false if no usable certificate is found. | |
3170 | */ | |
3171 | static int has_usable_cert(SSL *s, const SIGALG_LOOKUP *sig, int idx) | |
3172 | { | |
3173 | /* TLS 1.2 callers can override sig->sig_idx, but not TLS 1.3 callers. */ | |
3174 | if (idx == -1) | |
3175 | idx = sig->sig_idx; | |
3176 | if (!ssl_has_cert(s, idx)) | |
3177 | return 0; | |
3178 | ||
3179 | return check_cert_usable(s, sig, s->cert->pkeys[idx].x509, | |
3180 | s->cert->pkeys[idx].privatekey); | |
3181 | } | |
3182 | ||
3183 | /* | |
3184 | * Returns true if the supplied cert |x| and key |pkey| is usable with the | |
3185 | * specified signature scheme |sig|, or false otherwise. | |
3186 | */ | |
3187 | static int is_cert_usable(SSL *s, const SIGALG_LOOKUP *sig, X509 *x, | |
3188 | EVP_PKEY *pkey) | |
3189 | { | |
3190 | size_t idx; | |
3191 | ||
3192 | if (ssl_cert_lookup_by_pkey(pkey, &idx) == NULL) | |
3193 | return 0; | |
3194 | ||
3195 | /* Check the key is consistent with the sig alg */ | |
3196 | if ((int)idx != sig->sig_idx) | |
3197 | return 0; | |
3198 | ||
3199 | return check_cert_usable(s, sig, x, pkey); | |
3200 | } | |
3201 | ||
3202 | /* | |
3203 | * Find a signature scheme that works with the supplied certificate |x| and key | |
3204 | * |pkey|. |x| and |pkey| may be NULL in which case we additionally look at our | |
3205 | * available certs/keys to find one that works. | |
3206 | */ | |
3207 | static const SIGALG_LOOKUP *find_sig_alg(SSL *s, X509 *x, EVP_PKEY *pkey) | |
3208 | { | |
3209 | const SIGALG_LOOKUP *lu = NULL; | |
3210 | size_t i; | |
5235ef44 | 3211 | int curve = -1; |
5235ef44 MC |
3212 | EVP_PKEY *tmppkey; |
3213 | ||
3214 | /* Look for a shared sigalgs matching possible certificates */ | |
3215 | for (i = 0; i < s->shared_sigalgslen; i++) { | |
3216 | lu = s->shared_sigalgs[i]; | |
3217 | ||
3218 | /* Skip SHA1, SHA224, DSA and RSA if not PSS */ | |
3219 | if (lu->hash == NID_sha1 | |
3220 | || lu->hash == NID_sha224 | |
3221 | || lu->sig == EVP_PKEY_DSA | |
3222 | || lu->sig == EVP_PKEY_RSA) | |
3223 | continue; | |
3224 | /* Check that we have a cert, and signature_algorithms_cert */ | |
c8f6c28a | 3225 | if (!tls1_lookup_md(s->ctx, lu, NULL)) |
5235ef44 MC |
3226 | continue; |
3227 | if ((pkey == NULL && !has_usable_cert(s, lu, -1)) | |
3228 | || (pkey != NULL && !is_cert_usable(s, lu, x, pkey))) | |
3229 | continue; | |
3230 | ||
3231 | tmppkey = (pkey != NULL) ? pkey | |
3232 | : s->cert->pkeys[lu->sig_idx].privatekey; | |
3233 | ||
3234 | if (lu->sig == EVP_PKEY_EC) { | |
c2041da8 | 3235 | if (curve == -1) |
d8975dec | 3236 | curve = ssl_get_EC_curve_nid(tmppkey); |
5235ef44 MC |
3237 | if (lu->curve != NID_undef && curve != lu->curve) |
3238 | continue; | |
5235ef44 MC |
3239 | } else if (lu->sig == EVP_PKEY_RSA_PSS) { |
3240 | /* validate that key is large enough for the signature algorithm */ | |
c5f87134 | 3241 | if (!rsa_pss_check_min_key_size(s->ctx, tmppkey, lu)) |
5235ef44 MC |
3242 | continue; |
3243 | } | |
3244 | break; | |
3245 | } | |
3246 | ||
3247 | if (i == s->shared_sigalgslen) | |
3248 | return NULL; | |
3249 | ||
3250 | return lu; | |
3251 | } | |
3252 | ||
93a77f9e DSH |
3253 | /* |
3254 | * Choose an appropriate signature algorithm based on available certificates | |
717a265a DSH |
3255 | * Sets chosen certificate and signature algorithm. |
3256 | * | |
f63a17d6 MC |
3257 | * For servers if we fail to find a required certificate it is a fatal error, |
3258 | * an appropriate error code is set and a TLS alert is sent. | |
717a265a | 3259 | * |
f63a17d6 | 3260 | * For clients fatalerrs is set to 0. If a certificate is not suitable it is not |
717a265a DSH |
3261 | * a fatal error: we will either try another certificate or not present one |
3262 | * to the server. In this case no error is set. | |
93a77f9e | 3263 | */ |
f63a17d6 | 3264 | int tls_choose_sigalg(SSL *s, int fatalerrs) |
93a77f9e | 3265 | { |
0972bc5c | 3266 | const SIGALG_LOOKUP *lu = NULL; |
b46867d7 | 3267 | int sig_idx = -1; |
0972bc5c | 3268 | |
555cbb32 TS |
3269 | s->s3.tmp.cert = NULL; |
3270 | s->s3.tmp.sigalg = NULL; | |
717a265a | 3271 | |
93a77f9e | 3272 | if (SSL_IS_TLS13(s)) { |
5235ef44 MC |
3273 | lu = find_sig_alg(s, NULL, NULL); |
3274 | if (lu == NULL) { | |
f63a17d6 | 3275 | if (!fatalerrs) |
717a265a | 3276 | return 1; |
c48ffbcc | 3277 | SSLfatal(s, SSL_AD_HANDSHAKE_FAILURE, |
f63a17d6 | 3278 | SSL_R_NO_SUITABLE_SIGNATURE_ALGORITHM); |
0972bc5c DSH |
3279 | return 0; |
3280 | } | |
3281 | } else { | |
7f6b466b | 3282 | /* If ciphersuite doesn't require a cert nothing to do */ |
555cbb32 | 3283 | if (!(s->s3.tmp.new_cipher->algorithm_auth & SSL_aCERT)) |
7f6b466b DSH |
3284 | return 1; |
3285 | if (!s->server && !ssl_has_cert(s, s->cert->key - s->cert->pkeys)) | |
717a265a | 3286 | return 1; |
0972bc5c DSH |
3287 | |
3288 | if (SSL_USE_SIGALGS(s)) { | |
c589c34e | 3289 | size_t i; |
555cbb32 | 3290 | if (s->s3.tmp.peer_sigalgs != NULL) { |
c2041da8 | 3291 | int curve = -1; |
599b586d DSH |
3292 | |
3293 | /* For Suite B need to match signature algorithm to curve */ | |
c2041da8 | 3294 | if (tls1_suiteb(s)) |
d8975dec RL |
3295 | curve = ssl_get_EC_curve_nid(s->cert->pkeys[SSL_PKEY_ECC] |
3296 | .privatekey); | |
0972bc5c DSH |
3297 | |
3298 | /* | |
3299 | * Find highest preference signature algorithm matching | |
3300 | * cert type | |
3301 | */ | |
29948ac8 BK |
3302 | for (i = 0; i < s->shared_sigalgslen; i++) { |
3303 | lu = s->shared_sigalgs[i]; | |
7f6b466b DSH |
3304 | |
3305 | if (s->server) { | |
b46867d7 | 3306 | if ((sig_idx = tls12_get_cert_sigalg_idx(s, lu)) == -1) |
7f6b466b | 3307 | continue; |
b46867d7 DSH |
3308 | } else { |
3309 | int cc_idx = s->cert->key - s->cert->pkeys; | |
3310 | ||
3311 | sig_idx = lu->sig_idx; | |
c589c34e BK |
3312 | if (cc_idx != sig_idx) |
3313 | continue; | |
b2021556 | 3314 | } |
c589c34e BK |
3315 | /* Check that we have a cert, and sig_algs_cert */ |
3316 | if (!has_usable_cert(s, lu, sig_idx)) | |
3317 | continue; | |
0fe3db25 NR |
3318 | if (lu->sig == EVP_PKEY_RSA_PSS) { |
3319 | /* validate that key is large enough for the signature algorithm */ | |
bcec0b94 | 3320 | EVP_PKEY *pkey = s->cert->pkeys[sig_idx].privatekey; |
0fe3db25 | 3321 | |
c5f87134 | 3322 | if (!rsa_pss_check_min_key_size(s->ctx, pkey, lu)) |
0fe3db25 NR |
3323 | continue; |
3324 | } | |
7f6b466b | 3325 | if (curve == -1 || lu->curve == curve) |
0972bc5c DSH |
3326 | break; |
3327 | } | |
db30f432 DB |
3328 | #ifndef OPENSSL_NO_GOST |
3329 | /* | |
3330 | * Some Windows-based implementations do not send GOST algorithms indication | |
3331 | * in supported_algorithms extension, so when we have GOST-based ciphersuite, | |
3332 | * we have to assume GOST support. | |
3333 | */ | |
3334 | if (i == s->shared_sigalgslen && s->s3.tmp.new_cipher->algorithm_auth & (SSL_aGOST01 | SSL_aGOST12)) { | |
3335 | if ((lu = tls1_get_legacy_sigalg(s, -1)) == NULL) { | |
3336 | if (!fatalerrs) | |
3337 | return 1; | |
3338 | SSLfatal(s, SSL_AD_HANDSHAKE_FAILURE, | |
db30f432 DB |
3339 | SSL_R_NO_SUITABLE_SIGNATURE_ALGORITHM); |
3340 | return 0; | |
3341 | } else { | |
3342 | i = 0; | |
3343 | sig_idx = lu->sig_idx; | |
3344 | } | |
3345 | } | |
3346 | #endif | |
29948ac8 | 3347 | if (i == s->shared_sigalgslen) { |
f63a17d6 | 3348 | if (!fatalerrs) |
717a265a | 3349 | return 1; |
b8fef8ee | 3350 | SSLfatal(s, SSL_AD_HANDSHAKE_FAILURE, |
b8fef8ee | 3351 | SSL_R_NO_SUITABLE_SIGNATURE_ALGORITHM); |
0972bc5c DSH |
3352 | return 0; |
3353 | } | |
3354 | } else { | |
3355 | /* | |
3356 | * If we have no sigalg use defaults | |
3357 | */ | |
3358 | const uint16_t *sent_sigs; | |
c589c34e | 3359 | size_t sent_sigslen; |
0972bc5c | 3360 | |
7f6b466b | 3361 | if ((lu = tls1_get_legacy_sigalg(s, -1)) == NULL) { |
f63a17d6 | 3362 | if (!fatalerrs) |
717a265a | 3363 | return 1; |
b4f1b7b6 | 3364 | SSLfatal(s, SSL_AD_HANDSHAKE_FAILURE, |
a70535f8 | 3365 | SSL_R_NO_SUITABLE_SIGNATURE_ALGORITHM); |
0972bc5c DSH |
3366 | return 0; |
3367 | } | |
3368 | ||
3369 | /* Check signature matches a type we sent */ | |
3370 | sent_sigslen = tls12_get_psigalgs(s, 1, &sent_sigs); | |
3371 | for (i = 0; i < sent_sigslen; i++, sent_sigs++) { | |
c589c34e BK |
3372 | if (lu->sigalg == *sent_sigs |
3373 | && has_usable_cert(s, lu, lu->sig_idx)) | |
0972bc5c DSH |
3374 | break; |
3375 | } | |
3376 | if (i == sent_sigslen) { | |
f63a17d6 | 3377 | if (!fatalerrs) |
717a265a | 3378 | return 1; |
b4f1b7b6 | 3379 | SSLfatal(s, SSL_AD_HANDSHAKE_FAILURE, |
f63a17d6 | 3380 | SSL_R_WRONG_SIGNATURE_TYPE); |
0972bc5c DSH |
3381 | return 0; |
3382 | } | |
3383 | } | |
3384 | } else { | |
7f6b466b | 3385 | if ((lu = tls1_get_legacy_sigalg(s, -1)) == NULL) { |
f63a17d6 | 3386 | if (!fatalerrs) |
717a265a | 3387 | return 1; |
c48ffbcc | 3388 | SSLfatal(s, SSL_AD_INTERNAL_ERROR, |
a70535f8 | 3389 | SSL_R_NO_SUITABLE_SIGNATURE_ALGORITHM); |
0972bc5c DSH |
3390 | return 0; |
3391 | } | |
3392 | } | |
93a77f9e | 3393 | } |
b46867d7 DSH |
3394 | if (sig_idx == -1) |
3395 | sig_idx = lu->sig_idx; | |
555cbb32 TS |
3396 | s->s3.tmp.cert = &s->cert->pkeys[sig_idx]; |
3397 | s->cert->key = s->s3.tmp.cert; | |
3398 | s->s3.tmp.sigalg = lu; | |
93a77f9e DSH |
3399 | return 1; |
3400 | } | |
cf72c757 F |
3401 | |
3402 | int SSL_CTX_set_tlsext_max_fragment_length(SSL_CTX *ctx, uint8_t mode) | |
3403 | { | |
3404 | if (mode != TLSEXT_max_fragment_length_DISABLED | |
3405 | && !IS_MAX_FRAGMENT_LENGTH_EXT_VALID(mode)) { | |
6849b73c | 3406 | ERR_raise(ERR_LIB_SSL, SSL_R_SSL3_EXT_INVALID_MAX_FRAGMENT_LENGTH); |
cf72c757 F |
3407 | return 0; |
3408 | } | |
3409 | ||
3410 | ctx->ext.max_fragment_len_mode = mode; | |
3411 | return 1; | |
3412 | } | |
3413 | ||
3414 | int SSL_set_tlsext_max_fragment_length(SSL *ssl, uint8_t mode) | |
3415 | { | |
3416 | if (mode != TLSEXT_max_fragment_length_DISABLED | |
3417 | && !IS_MAX_FRAGMENT_LENGTH_EXT_VALID(mode)) { | |
6849b73c | 3418 | ERR_raise(ERR_LIB_SSL, SSL_R_SSL3_EXT_INVALID_MAX_FRAGMENT_LENGTH); |
cf72c757 F |
3419 | return 0; |
3420 | } | |
3421 | ||
3422 | ssl->ext.max_fragment_len_mode = mode; | |
3423 | return 1; | |
3424 | } | |
3425 | ||
3426 | uint8_t SSL_SESSION_get_max_fragment_length(const SSL_SESSION *session) | |
3427 | { | |
3428 | return session->ext.max_fragment_len_mode; | |
3429 | } | |
a76ce286 P |
3430 | |
3431 | /* | |
3432 | * Helper functions for HMAC access with legacy support included. | |
3433 | */ | |
3434 | SSL_HMAC *ssl_hmac_new(const SSL_CTX *ctx) | |
3435 | { | |
3436 | SSL_HMAC *ret = OPENSSL_zalloc(sizeof(*ret)); | |
3437 | EVP_MAC *mac = NULL; | |
3438 | ||
3439 | if (ret == NULL) | |
3440 | return NULL; | |
3441 | #ifndef OPENSSL_NO_DEPRECATED_3_0 | |
3442 | if (ctx->ext.ticket_key_evp_cb == NULL | |
3443 | && ctx->ext.ticket_key_cb != NULL) { | |
301fcb28 | 3444 | if (!ssl_hmac_old_new(ret)) |
a76ce286 P |
3445 | goto err; |
3446 | return ret; | |
3447 | } | |
3448 | #endif | |
7f80980f | 3449 | mac = EVP_MAC_fetch(ctx->libctx, "HMAC", ctx->propq); |
865adf97 | 3450 | if (mac == NULL || (ret->ctx = EVP_MAC_CTX_new(mac)) == NULL) |
a76ce286 P |
3451 | goto err; |
3452 | EVP_MAC_free(mac); | |
3453 | return ret; | |
3454 | err: | |
865adf97 | 3455 | EVP_MAC_CTX_free(ret->ctx); |
a76ce286 P |
3456 | EVP_MAC_free(mac); |
3457 | OPENSSL_free(ret); | |
3458 | return NULL; | |
3459 | } | |
3460 | ||
3461 | void ssl_hmac_free(SSL_HMAC *ctx) | |
3462 | { | |
3463 | if (ctx != NULL) { | |
865adf97 | 3464 | EVP_MAC_CTX_free(ctx->ctx); |
a76ce286 | 3465 | #ifndef OPENSSL_NO_DEPRECATED_3_0 |
301fcb28 | 3466 | ssl_hmac_old_free(ctx); |
a76ce286 P |
3467 | #endif |
3468 | OPENSSL_free(ctx); | |
3469 | } | |
3470 | } | |
3471 | ||
a76ce286 P |
3472 | EVP_MAC_CTX *ssl_hmac_get0_EVP_MAC_CTX(SSL_HMAC *ctx) |
3473 | { | |
3474 | return ctx->ctx; | |
3475 | } | |
3476 | ||
3477 | int ssl_hmac_init(SSL_HMAC *ctx, void *key, size_t len, char *md) | |
3478 | { | |
0edb8194 | 3479 | OSSL_PARAM params[2], *p = params; |
a76ce286 P |
3480 | |
3481 | if (ctx->ctx != NULL) { | |
3482 | *p++ = OSSL_PARAM_construct_utf8_string(OSSL_MAC_PARAM_DIGEST, md, 0); | |
a76ce286 | 3483 | *p = OSSL_PARAM_construct_end(); |
0edb8194 | 3484 | if (EVP_MAC_init(ctx->ctx, key, len, params)) |
a76ce286 P |
3485 | return 1; |
3486 | } | |
3487 | #ifndef OPENSSL_NO_DEPRECATED_3_0 | |
3488 | if (ctx->old_ctx != NULL) | |
301fcb28 | 3489 | return ssl_hmac_old_init(ctx, key, len, md); |
a76ce286 P |
3490 | #endif |
3491 | return 0; | |
3492 | } | |
3493 | ||
3494 | int ssl_hmac_update(SSL_HMAC *ctx, const unsigned char *data, size_t len) | |
3495 | { | |
3496 | if (ctx->ctx != NULL) | |
3497 | return EVP_MAC_update(ctx->ctx, data, len); | |
3498 | #ifndef OPENSSL_NO_DEPRECATED_3_0 | |
3499 | if (ctx->old_ctx != NULL) | |
301fcb28 | 3500 | return ssl_hmac_old_update(ctx, data, len); |
a76ce286 P |
3501 | #endif |
3502 | return 0; | |
3503 | } | |
3504 | ||
3505 | int ssl_hmac_final(SSL_HMAC *ctx, unsigned char *md, size_t *len, | |
3506 | size_t max_size) | |
3507 | { | |
3508 | if (ctx->ctx != NULL) | |
3509 | return EVP_MAC_final(ctx->ctx, md, len, max_size); | |
3510 | #ifndef OPENSSL_NO_DEPRECATED_3_0 | |
301fcb28 MC |
3511 | if (ctx->old_ctx != NULL) |
3512 | return ssl_hmac_old_final(ctx, md, len); | |
a76ce286 P |
3513 | #endif |
3514 | return 0; | |
3515 | } | |
3516 | ||
3517 | size_t ssl_hmac_size(const SSL_HMAC *ctx) | |
3518 | { | |
3519 | if (ctx->ctx != NULL) | |
90a2576b | 3520 | return EVP_MAC_CTX_get_mac_size(ctx->ctx); |
a76ce286 P |
3521 | #ifndef OPENSSL_NO_DEPRECATED_3_0 |
3522 | if (ctx->old_ctx != NULL) | |
301fcb28 | 3523 | return ssl_hmac_old_size(ctx); |
a76ce286 P |
3524 | #endif |
3525 | return 0; | |
3526 | } | |
3527 | ||
d8975dec RL |
3528 | int ssl_get_EC_curve_nid(const EVP_PKEY *pkey) |
3529 | { | |
3530 | char gname[OSSL_MAX_NAME_SIZE]; | |
3531 | ||
3532 | if (EVP_PKEY_get_group_name(pkey, gname, sizeof(gname), NULL) > 0) | |
3533 | return OBJ_txt2nid(gname); | |
3534 | ||
3535 | return NID_undef; | |
3536 | } | |
d5530efa TM |
3537 | |
3538 | __owur int tls13_set_encoded_pub_key(EVP_PKEY *pkey, | |
3539 | const unsigned char *enckey, | |
3540 | size_t enckeylen) | |
3541 | { | |
3542 | if (EVP_PKEY_is_a(pkey, "DH")) { | |
3543 | int bits = EVP_PKEY_get_bits(pkey); | |
3544 | ||
3545 | if (bits <= 0 || enckeylen != (size_t)bits / 8) | |
3546 | /* the encoded key must be padded to the length of the p */ | |
3547 | return 0; | |
3548 | } else if (EVP_PKEY_is_a(pkey, "EC")) { | |
3549 | if (enckeylen < 3 /* point format and at least 1 byte for x and y */ | |
3550 | || enckey[0] != 0x04) | |
3551 | return 0; | |
3552 | } | |
3553 | ||
3554 | return EVP_PKEY_set1_encoded_public_key(pkey, enckey, enckeylen); | |
3555 | } |