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Commit | Line | Data |
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846e33c7 | 1 | /* |
4333b89f | 2 | * Copyright 1995-2021 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}, | |
9d2d857f MC |
174 | {NID_id_tc26_gost_3410_2012_256_paramSetA, 0x0022}, |
175 | {NID_id_tc26_gost_3410_2012_256_paramSetB, 0x0023}, | |
176 | {NID_id_tc26_gost_3410_2012_256_paramSetC, 0x0024}, | |
177 | {NID_id_tc26_gost_3410_2012_256_paramSetD, 0x0025}, | |
178 | {NID_id_tc26_gost_3410_2012_512_paramSetA, 0x0026}, | |
179 | {NID_id_tc26_gost_3410_2012_512_paramSetB, 0x0027}, | |
180 | {NID_id_tc26_gost_3410_2012_512_paramSetC, 0x0028}, | |
48e971dd MC |
181 | {NID_ffdhe2048, OSSL_TLS_GROUP_ID_ffdhe2048}, |
182 | {NID_ffdhe3072, OSSL_TLS_GROUP_ID_ffdhe3072}, | |
183 | {NID_ffdhe4096, OSSL_TLS_GROUP_ID_ffdhe4096}, | |
184 | {NID_ffdhe6144, OSSL_TLS_GROUP_ID_ffdhe6144}, | |
185 | {NID_ffdhe8192, OSSL_TLS_GROUP_ID_ffdhe8192} | |
0f113f3e 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[] = { |
9e84a42d DSH |
196 | 29, /* X25519 (29) */ |
197 | 23, /* secp256r1 (23) */ | |
0e1d6ecf | 198 | 30, /* X448 (30) */ |
9e84a42d DSH |
199 | 25, /* secp521r1 (25) */ |
200 | 24, /* secp384r1 (24) */ | |
fa555aa8 NM |
201 | 34, /* GC256A (34) */ |
202 | 35, /* GC256B (35) */ | |
203 | 36, /* GC256C (36) */ | |
204 | 37, /* GC256D (37) */ | |
205 | 38, /* GC512A (38) */ | |
206 | 39, /* GC512B (39) */ | |
207 | 40, /* GC512C (40) */ | |
9aaecbfc | 208 | 0x100, /* ffdhe2048 (0x100) */ |
209 | 0x101, /* ffdhe3072 (0x101) */ | |
210 | 0x102, /* ffdhe4096 (0x102) */ | |
211 | 0x103, /* ffdhe6144 (0x103) */ | |
212 | 0x104, /* ffdhe8192 (0x104) */ | |
de57d237 EK |
213 | }; |
214 | ||
9e84a42d DSH |
215 | static const uint16_t suiteb_curves[] = { |
216 | TLSEXT_curve_P_256, | |
217 | TLSEXT_curve_P_384 | |
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 | ||
9d2d857f | 436 | const TLS_GROUP_INFO *tls1_group_id_lookup(SSL_CTX *ctx, uint16_t group_id) |
0f113f3e | 437 | { |
9aaecbfc | 438 | size_t i; |
439 | ||
9d2d857f MC |
440 | for (i = 0; i < ctx->group_list_len; i++) { |
441 | if (ctx->group_list[i].group_id == group_id) | |
442 | return &ctx->group_list[i]; | |
9aaecbfc | 443 | } |
9d2d857f | 444 | |
9aaecbfc | 445 | return NULL; |
0f113f3e | 446 | } |
525de5d3 | 447 | |
260009d8 | 448 | int tls1_group_id2nid(uint16_t group_id, int include_unknown) |
84d4b9e3 | 449 | { |
9d2d857f | 450 | size_t i; |
84d4b9e3 | 451 | |
260009d8 MC |
452 | if (group_id == 0) |
453 | return NID_undef; | |
454 | ||
9d2d857f MC |
455 | /* |
456 | * Return well known Group NIDs - for backwards compatibility. This won't | |
457 | * work for groups we don't know about. | |
458 | */ | |
459 | for (i = 0; i < OSSL_NELEM(nid_to_group); i++) | |
460 | { | |
461 | if (nid_to_group[i].group_id == group_id) | |
462 | return nid_to_group[i].nid; | |
463 | } | |
260009d8 MC |
464 | if (!include_unknown) |
465 | return NID_undef; | |
466 | return TLSEXT_nid_unknown | (int)group_id; | |
84d4b9e3 | 467 | } |
468 | ||
becbacd7 | 469 | uint16_t tls1_nid2group_id(int nid) |
0f113f3e | 470 | { |
2fa2d15a | 471 | size_t i; |
9aaecbfc | 472 | |
9d2d857f MC |
473 | /* |
474 | * Return well known Group ids - for backwards compatibility. This won't | |
475 | * work for groups we don't know about. | |
476 | */ | |
477 | for (i = 0; i < OSSL_NELEM(nid_to_group); i++) | |
478 | { | |
479 | if (nid_to_group[i].nid == nid) | |
480 | return nid_to_group[i].group_id; | |
0f113f3e | 481 | } |
9d2d857f | 482 | |
2fa2d15a | 483 | return 0; |
0f113f3e MC |
484 | } |
485 | ||
740580c2 | 486 | /* |
ff6d20a6 DSH |
487 | * Set *pgroups to the supported groups list and *pgroupslen to |
488 | * the number of groups supported. | |
fd2b65ce | 489 | */ |
ff6d20a6 DSH |
490 | void tls1_get_supported_groups(SSL *s, const uint16_t **pgroups, |
491 | size_t *pgroupslen) | |
0f113f3e | 492 | { |
34e5292c DSH |
493 | /* For Suite B mode only include P-256, P-384 */ |
494 | switch (tls1_suiteb(s)) { | |
495 | case SSL_CERT_FLAG_SUITEB_128_LOS: | |
ff6d20a6 DSH |
496 | *pgroups = suiteb_curves; |
497 | *pgroupslen = OSSL_NELEM(suiteb_curves); | |
34e5292c DSH |
498 | break; |
499 | ||
500 | case SSL_CERT_FLAG_SUITEB_128_LOS_ONLY: | |
ff6d20a6 DSH |
501 | *pgroups = suiteb_curves; |
502 | *pgroupslen = 1; | |
34e5292c DSH |
503 | break; |
504 | ||
505 | case SSL_CERT_FLAG_SUITEB_192_LOS: | |
ff6d20a6 DSH |
506 | *pgroups = suiteb_curves + 1; |
507 | *pgroupslen = 1; | |
34e5292c DSH |
508 | break; |
509 | ||
510 | default: | |
511 | if (s->ext.supportedgroups == NULL) { | |
ddf8f1ce MC |
512 | *pgroups = s->ctx->ext.supported_groups_default; |
513 | *pgroupslen = s->ctx->ext.supported_groups_default_len; | |
34e5292c | 514 | } else { |
ff6d20a6 DSH |
515 | *pgroups = s->ext.supportedgroups; |
516 | *pgroupslen = s->ext.supportedgroups_len; | |
0f113f3e | 517 | } |
34e5292c | 518 | break; |
0f113f3e | 519 | } |
0f113f3e | 520 | } |
b362ccab | 521 | |
8b1db5d3 MC |
522 | int tls_valid_group(SSL *s, uint16_t group_id, int minversion, int maxversion, |
523 | int isec, int *okfortls13) | |
9aaecbfc | 524 | { |
9d2d857f MC |
525 | const TLS_GROUP_INFO *ginfo = tls1_group_id_lookup(s->ctx, group_id); |
526 | int ret; | |
9aaecbfc | 527 | |
8b1db5d3 | 528 | if (okfortls13 != NULL) |
89e14ca7 | 529 | *okfortls13 = 0; |
8b1db5d3 | 530 | |
9d2d857f MC |
531 | if (ginfo == NULL) |
532 | return 0; | |
533 | ||
534 | if (SSL_IS_DTLS(s)) { | |
535 | if (ginfo->mindtls < 0 || ginfo->maxdtls < 0) | |
9aaecbfc | 536 | return 0; |
9d2d857f MC |
537 | if (ginfo->maxdtls == 0) |
538 | ret = 1; | |
539 | else | |
540 | ret = DTLS_VERSION_LE(minversion, ginfo->maxdtls); | |
541 | if (ginfo->mindtls > 0) | |
542 | ret &= DTLS_VERSION_GE(maxversion, ginfo->mindtls); | |
543 | } else { | |
544 | if (ginfo->mintls < 0 || ginfo->maxtls < 0) | |
545 | return 0; | |
546 | if (ginfo->maxtls == 0) | |
547 | ret = 1; | |
548 | else | |
549 | ret = (minversion <= ginfo->maxtls); | |
550 | if (ginfo->mintls > 0) | |
551 | ret &= (maxversion >= ginfo->mintls); | |
8b1db5d3 MC |
552 | if (ret && okfortls13 != NULL && maxversion == TLS1_3_VERSION) |
553 | *okfortls13 = (ginfo->maxtls == 0) | |
554 | || (ginfo->maxtls >= TLS1_3_VERSION); | |
9aaecbfc | 555 | } |
8b1db5d3 MC |
556 | ret &= !isec |
557 | || strcmp(ginfo->algorithm, "EC") == 0 | |
558 | || strcmp(ginfo->algorithm, "X25519") == 0 | |
559 | || strcmp(ginfo->algorithm, "X448") == 0; | |
9d2d857f MC |
560 | |
561 | return ret; | |
9aaecbfc | 562 | } |
563 | ||
dbc6268f MC |
564 | /* See if group is allowed by security callback */ |
565 | int tls_group_allowed(SSL *s, uint16_t group, int op) | |
0f113f3e | 566 | { |
9d2d857f | 567 | const TLS_GROUP_INFO *ginfo = tls1_group_id_lookup(s->ctx, group); |
dbc6268f | 568 | unsigned char gtmp[2]; |
5ce5f787 | 569 | |
dbc6268f | 570 | if (ginfo == NULL) |
0f113f3e | 571 | return 0; |
9d2d857f | 572 | |
dbc6268f MC |
573 | gtmp[0] = group >> 8; |
574 | gtmp[1] = group & 0xff; | |
9d2d857f | 575 | return ssl_security(s, op, ginfo->secbits, |
260009d8 | 576 | tls1_group_id2nid(ginfo->group_id, 0), (void *)gtmp); |
0f113f3e | 577 | } |
b362ccab | 578 | |
b50951d3 DSH |
579 | /* Return 1 if "id" is in "list" */ |
580 | static int tls1_in_list(uint16_t id, const uint16_t *list, size_t listlen) | |
581 | { | |
582 | size_t i; | |
583 | for (i = 0; i < listlen; i++) | |
584 | if (list[i] == id) | |
585 | return 1; | |
586 | return 0; | |
587 | } | |
588 | ||
1d97c843 | 589 | /*- |
8841154a | 590 | * For nmatch >= 0, return the id of the |nmatch|th shared group or 0 |
6977e8ee KR |
591 | * if there is no match. |
592 | * For nmatch == -1, return number of matches | |
8841154a | 593 | * For nmatch == -2, return the id of the group to use for |
b50951d3 | 594 | * a tmp key, or 0 if there is no match. |
d0595f17 | 595 | */ |
8841154a | 596 | uint16_t tls1_shared_group(SSL *s, int nmatch) |
0f113f3e | 597 | { |
9e84a42d | 598 | const uint16_t *pref, *supp; |
b50951d3 | 599 | size_t num_pref, num_supp, i; |
0f113f3e | 600 | int k; |
3e373518 | 601 | |
0f113f3e MC |
602 | /* Can't do anything on client side */ |
603 | if (s->server == 0) | |
8841154a | 604 | return 0; |
0f113f3e MC |
605 | if (nmatch == -2) { |
606 | if (tls1_suiteb(s)) { | |
607 | /* | |
608 | * For Suite B ciphersuite determines curve: we already know | |
609 | * these are acceptable due to previous checks. | |
610 | */ | |
555cbb32 | 611 | unsigned long cid = s->s3.tmp.new_cipher->id; |
3e373518 | 612 | |
0f113f3e | 613 | if (cid == TLS1_CK_ECDHE_ECDSA_WITH_AES_128_GCM_SHA256) |
8841154a | 614 | return TLSEXT_curve_P_256; |
0f113f3e | 615 | if (cid == TLS1_CK_ECDHE_ECDSA_WITH_AES_256_GCM_SHA384) |
8841154a | 616 | return TLSEXT_curve_P_384; |
0f113f3e | 617 | /* Should never happen */ |
8841154a | 618 | return 0; |
0f113f3e MC |
619 | } |
620 | /* If not Suite B just return first preference shared curve */ | |
621 | nmatch = 0; | |
622 | } | |
623 | /* | |
ff6d20a6 DSH |
624 | * If server preference set, our groups are the preference order |
625 | * otherwise peer decides. | |
0f113f3e | 626 | */ |
ff6d20a6 DSH |
627 | if (s->options & SSL_OP_CIPHER_SERVER_PREFERENCE) { |
628 | tls1_get_supported_groups(s, &pref, &num_pref); | |
629 | tls1_get_peer_groups(s, &supp, &num_supp); | |
630 | } else { | |
631 | tls1_get_peer_groups(s, &pref, &num_pref); | |
632 | tls1_get_supported_groups(s, &supp, &num_supp); | |
633 | } | |
3c06513f | 634 | |
9e84a42d DSH |
635 | for (k = 0, i = 0; i < num_pref; i++) { |
636 | uint16_t id = pref[i]; | |
3e373518 | 637 | |
b50951d3 | 638 | if (!tls1_in_list(id, supp, num_supp) |
dbc6268f | 639 | || !tls_group_allowed(s, id, SSL_SECOP_CURVE_SHARED)) |
0f113f3e | 640 | continue; |
b50951d3 DSH |
641 | if (nmatch == k) |
642 | return id; | |
643 | k++; | |
0f113f3e MC |
644 | } |
645 | if (nmatch == -1) | |
646 | return k; | |
647 | /* Out of range (nmatch > k). */ | |
8841154a | 648 | return 0; |
0f113f3e | 649 | } |
d0595f17 | 650 | |
9e84a42d | 651 | int tls1_set_groups(uint16_t **pext, size_t *pextlen, |
de4d764e | 652 | int *groups, size_t ngroups) |
0f113f3e | 653 | { |
9e84a42d | 654 | uint16_t *glist; |
0f113f3e MC |
655 | size_t i; |
656 | /* | |
9aaecbfc | 657 | * Bitmap of groups included to detect duplicates: two variables are added |
658 | * to detect duplicates as some values are more than 32. | |
0f113f3e | 659 | */ |
9aaecbfc | 660 | unsigned long *dup_list = NULL; |
661 | unsigned long dup_list_egrp = 0; | |
662 | unsigned long dup_list_dhgrp = 0; | |
cdb10bae | 663 | |
680bd131 | 664 | if (ngroups == 0) { |
6849b73c | 665 | ERR_raise(ERR_LIB_SSL, SSL_R_BAD_LENGTH); |
680bd131 MC |
666 | return 0; |
667 | } | |
cdb10bae | 668 | if ((glist = OPENSSL_malloc(ngroups * sizeof(*glist))) == NULL) { |
6849b73c | 669 | ERR_raise(ERR_LIB_SSL, ERR_R_MALLOC_FAILURE); |
0f113f3e | 670 | return 0; |
cdb10bae | 671 | } |
9e84a42d | 672 | for (i = 0; i < ngroups; i++) { |
0f113f3e | 673 | unsigned long idmask; |
9e84a42d | 674 | uint16_t id; |
4a1b4280 | 675 | id = tls1_nid2group_id(groups[i]); |
9aaecbfc | 676 | if ((id & 0x00FF) >= (sizeof(unsigned long) * 8)) |
677 | goto err; | |
678 | idmask = 1L << (id & 0x00FF); | |
679 | dup_list = (id < 0x100) ? &dup_list_egrp : &dup_list_dhgrp; | |
680 | if (!id || ((*dup_list) & idmask)) | |
681 | goto err; | |
682 | *dup_list |= idmask; | |
9e84a42d | 683 | glist[i] = id; |
0f113f3e | 684 | } |
b548a1f1 | 685 | OPENSSL_free(*pext); |
de4d764e | 686 | *pext = glist; |
9e84a42d | 687 | *pextlen = ngroups; |
0f113f3e | 688 | return 1; |
9aaecbfc | 689 | err: |
690 | OPENSSL_free(glist); | |
691 | return 0; | |
0f113f3e MC |
692 | } |
693 | ||
57e7401f | 694 | # define GROUPLIST_INCREMENT 40 |
0a8e6c1f | 695 | # define GROUP_NAME_BUFFER_LENGTH 64 |
0f113f3e | 696 | typedef struct { |
260009d8 MC |
697 | SSL_CTX *ctx; |
698 | size_t gidcnt; | |
57e7401f MC |
699 | size_t gidmax; |
700 | uint16_t *gid_arr; | |
260009d8 | 701 | } gid_cb_st; |
d0595f17 | 702 | |
260009d8 | 703 | static int gid_cb(const char *elem, int len, void *arg) |
0f113f3e | 704 | { |
260009d8 | 705 | gid_cb_st *garg = arg; |
0f113f3e | 706 | size_t i; |
260009d8 | 707 | uint16_t gid = 0; |
0a8e6c1f | 708 | char etmp[GROUP_NAME_BUFFER_LENGTH]; |
260009d8 | 709 | |
2747d73c KR |
710 | if (elem == NULL) |
711 | return 0; | |
57e7401f MC |
712 | if (garg->gidcnt == garg->gidmax) { |
713 | uint16_t *tmp = | |
714 | OPENSSL_realloc(garg->gid_arr, garg->gidmax + GROUPLIST_INCREMENT); | |
715 | if (tmp == NULL) | |
716 | return 0; | |
717 | garg->gidmax += GROUPLIST_INCREMENT; | |
718 | garg->gid_arr = tmp; | |
719 | } | |
0f113f3e MC |
720 | if (len > (int)(sizeof(etmp) - 1)) |
721 | return 0; | |
722 | memcpy(etmp, elem, len); | |
723 | etmp[len] = 0; | |
260009d8 MC |
724 | |
725 | gid = tls1_group_name2id(garg->ctx, etmp); | |
726 | if (gid == 0) | |
0f113f3e | 727 | return 0; |
260009d8 MC |
728 | for (i = 0; i < garg->gidcnt; i++) |
729 | if (garg->gid_arr[i] == gid) | |
0f113f3e | 730 | return 0; |
260009d8 | 731 | garg->gid_arr[garg->gidcnt++] = gid; |
0f113f3e MC |
732 | return 1; |
733 | } | |
734 | ||
260009d8 MC |
735 | /* Set groups based on a colon separated list */ |
736 | int tls1_set_groups_list(SSL_CTX *ctx, uint16_t **pext, size_t *pextlen, | |
737 | const char *str) | |
0f113f3e | 738 | { |
260009d8 MC |
739 | gid_cb_st gcb; |
740 | uint16_t *tmparr; | |
57e7401f | 741 | int ret = 0; |
260009d8 MC |
742 | |
743 | gcb.gidcnt = 0; | |
57e7401f MC |
744 | gcb.gidmax = GROUPLIST_INCREMENT; |
745 | gcb.gid_arr = OPENSSL_malloc(gcb.gidmax * sizeof(*gcb.gid_arr)); | |
746 | if (gcb.gid_arr == NULL) | |
747 | return 0; | |
260009d8 MC |
748 | gcb.ctx = ctx; |
749 | if (!CONF_parse_list(str, ':', 1, gid_cb, &gcb)) | |
57e7401f MC |
750 | goto end; |
751 | if (pext == NULL) { | |
752 | ret = 1; | |
753 | goto end; | |
754 | } | |
260009d8 MC |
755 | |
756 | /* | |
757 | * gid_cb ensurse there are no duplicates so we can just go ahead and set | |
758 | * the result | |
759 | */ | |
760 | tmparr = OPENSSL_memdup(gcb.gid_arr, gcb.gidcnt * sizeof(*tmparr)); | |
761 | if (tmparr == NULL) | |
57e7401f | 762 | goto end; |
260009d8 MC |
763 | *pext = tmparr; |
764 | *pextlen = gcb.gidcnt; | |
57e7401f MC |
765 | ret = 1; |
766 | end: | |
767 | OPENSSL_free(gcb.gid_arr); | |
768 | return ret; | |
0f113f3e | 769 | } |
b50951d3 | 770 | |
4a1b4280 | 771 | /* Check a group id matches preferences */ |
dcf8b01f | 772 | int tls1_check_group_id(SSL *s, uint16_t group_id, int check_own_groups) |
4a1b4280 DSH |
773 | { |
774 | const uint16_t *groups; | |
b50951d3 | 775 | size_t groups_len; |
4a1b4280 DSH |
776 | |
777 | if (group_id == 0) | |
778 | return 0; | |
779 | ||
6447e818 | 780 | /* Check for Suite B compliance */ |
555cbb32 TS |
781 | if (tls1_suiteb(s) && s->s3.tmp.new_cipher != NULL) { |
782 | unsigned long cid = s->s3.tmp.new_cipher->id; | |
6447e818 DSH |
783 | |
784 | if (cid == TLS1_CK_ECDHE_ECDSA_WITH_AES_128_GCM_SHA256) { | |
785 | if (group_id != TLSEXT_curve_P_256) | |
786 | return 0; | |
787 | } else if (cid == TLS1_CK_ECDHE_ECDSA_WITH_AES_256_GCM_SHA384) { | |
788 | if (group_id != TLSEXT_curve_P_384) | |
789 | return 0; | |
790 | } else { | |
791 | /* Should never happen */ | |
792 | return 0; | |
793 | } | |
794 | } | |
b50951d3 | 795 | |
dcf8b01f MC |
796 | if (check_own_groups) { |
797 | /* Check group is one of our preferences */ | |
798 | tls1_get_supported_groups(s, &groups, &groups_len); | |
799 | if (!tls1_in_list(group_id, groups, groups_len)) | |
800 | return 0; | |
801 | } | |
4a1b4280 | 802 | |
dbc6268f | 803 | if (!tls_group_allowed(s, group_id, SSL_SECOP_CURVE_CHECK)) |
6447e818 DSH |
804 | return 0; |
805 | ||
4a1b4280 DSH |
806 | /* For clients, nothing more to check */ |
807 | if (!s->server) | |
808 | return 1; | |
809 | ||
810 | /* Check group is one of peers preferences */ | |
ff6d20a6 | 811 | tls1_get_peer_groups(s, &groups, &groups_len); |
4a1b4280 DSH |
812 | |
813 | /* | |
814 | * RFC 4492 does not require the supported elliptic curves extension | |
815 | * so if it is not sent we can just choose any curve. | |
816 | * It is invalid to send an empty list in the supported groups | |
817 | * extension, so groups_len == 0 always means no extension. | |
818 | */ | |
819 | if (groups_len == 0) | |
820 | return 1; | |
b50951d3 | 821 | return tls1_in_list(group_id, groups, groups_len); |
0f113f3e | 822 | } |
d61ff83b | 823 | |
7da160b0 MC |
824 | void tls1_get_formatlist(SSL *s, const unsigned char **pformats, |
825 | size_t *num_formats) | |
0f113f3e MC |
826 | { |
827 | /* | |
828 | * If we have a custom point format list use it otherwise use default | |
829 | */ | |
aff8c126 RS |
830 | if (s->ext.ecpointformats) { |
831 | *pformats = s->ext.ecpointformats; | |
832 | *num_formats = s->ext.ecpointformats_len; | |
0f113f3e MC |
833 | } else { |
834 | *pformats = ecformats_default; | |
835 | /* For Suite B we don't support char2 fields */ | |
836 | if (tls1_suiteb(s)) | |
837 | *num_formats = sizeof(ecformats_default) - 1; | |
838 | else | |
839 | *num_formats = sizeof(ecformats_default); | |
840 | } | |
841 | } | |
842 | ||
dbc6268f MC |
843 | /* Check a key is compatible with compression extension */ |
844 | static int tls1_check_pkey_comp(SSL *s, EVP_PKEY *pkey) | |
845 | { | |
dbc6268f MC |
846 | unsigned char comp_id; |
847 | size_t i; | |
3d34bedf | 848 | int point_conv; |
dbc6268f MC |
849 | |
850 | /* If not an EC key nothing to check */ | |
c2041da8 | 851 | if (!EVP_PKEY_is_a(pkey, "EC")) |
dbc6268f | 852 | return 1; |
5b5eea4b | 853 | |
dbc6268f MC |
854 | |
855 | /* Get required compression id */ | |
3d34bedf MC |
856 | point_conv = EVP_PKEY_get_ec_point_conv_form(pkey); |
857 | if (point_conv == 0) | |
858 | return 0; | |
859 | if (point_conv == POINT_CONVERSION_UNCOMPRESSED) { | |
860 | comp_id = TLSEXT_ECPOINTFORMAT_uncompressed; | |
dbc6268f | 861 | } else if (SSL_IS_TLS13(s)) { |
5b5eea4b SL |
862 | /* |
863 | * ec_point_formats extension is not used in TLSv1.3 so we ignore | |
864 | * this check. | |
865 | */ | |
866 | return 1; | |
dbc6268f | 867 | } else { |
3d34bedf | 868 | int field_type = EVP_PKEY_get_field_type(pkey); |
dbc6268f | 869 | |
3d34bedf | 870 | if (field_type == NID_X9_62_prime_field) |
dbc6268f | 871 | comp_id = TLSEXT_ECPOINTFORMAT_ansiX962_compressed_prime; |
3d34bedf | 872 | else if (field_type == NID_X9_62_characteristic_two_field) |
dbc6268f MC |
873 | comp_id = TLSEXT_ECPOINTFORMAT_ansiX962_compressed_char2; |
874 | else | |
875 | return 0; | |
876 | } | |
877 | /* | |
878 | * If point formats extension present check it, otherwise everything is | |
879 | * supported (see RFC4492). | |
880 | */ | |
cd0fb43c | 881 | if (s->ext.peer_ecpointformats == NULL) |
dbc6268f MC |
882 | return 1; |
883 | ||
cd0fb43c MC |
884 | for (i = 0; i < s->ext.peer_ecpointformats_len; i++) { |
885 | if (s->ext.peer_ecpointformats[i] == comp_id) | |
dbc6268f MC |
886 | return 1; |
887 | } | |
888 | return 0; | |
889 | } | |
890 | ||
891 | /* Return group id of a key */ | |
892 | static uint16_t tls1_get_group_id(EVP_PKEY *pkey) | |
893 | { | |
d8975dec | 894 | int curve_nid = ssl_get_EC_curve_nid(pkey); |
dbc6268f | 895 | |
c2041da8 | 896 | if (curve_nid == NID_undef) |
dbc6268f | 897 | return 0; |
c2041da8 | 898 | return tls1_nid2group_id(curve_nid); |
dbc6268f MC |
899 | } |
900 | ||
0f113f3e MC |
901 | /* |
902 | * Check cert parameters compatible with extensions: currently just checks EC | |
903 | * certificates have compatible curves and compression. | |
d61ff83b | 904 | */ |
9195ddcd | 905 | static int tls1_check_cert_param(SSL *s, X509 *x, int check_ee_md) |
0f113f3e | 906 | { |
4a1b4280 | 907 | uint16_t group_id; |
0f113f3e | 908 | EVP_PKEY *pkey; |
8382fd3a | 909 | pkey = X509_get0_pubkey(x); |
4a1b4280 | 910 | if (pkey == NULL) |
0f113f3e MC |
911 | return 0; |
912 | /* If not EC nothing to do */ | |
c2041da8 | 913 | if (!EVP_PKEY_is_a(pkey, "EC")) |
0f113f3e | 914 | return 1; |
4a1b4280 DSH |
915 | /* Check compression */ |
916 | if (!tls1_check_pkey_comp(s, pkey)) | |
0f113f3e | 917 | return 0; |
4a1b4280 | 918 | group_id = tls1_get_group_id(pkey); |
dcf8b01f MC |
919 | /* |
920 | * For a server we allow the certificate to not be in our list of supported | |
921 | * groups. | |
922 | */ | |
923 | if (!tls1_check_group_id(s, group_id, !s->server)) | |
0f113f3e MC |
924 | return 0; |
925 | /* | |
926 | * Special case for suite B. We *MUST* sign using SHA256+P-256 or | |
9195ddcd | 927 | * SHA384+P-384. |
0f113f3e | 928 | */ |
9195ddcd | 929 | if (check_ee_md && tls1_suiteb(s)) { |
0f113f3e MC |
930 | int check_md; |
931 | size_t i; | |
9e84a42d | 932 | |
0f113f3e | 933 | /* Check to see we have necessary signing algorithm */ |
4a1b4280 | 934 | if (group_id == TLSEXT_curve_P_256) |
0f113f3e | 935 | check_md = NID_ecdsa_with_SHA256; |
4a1b4280 | 936 | else if (group_id == TLSEXT_curve_P_384) |
0f113f3e MC |
937 | check_md = NID_ecdsa_with_SHA384; |
938 | else | |
939 | return 0; /* Should never happen */ | |
29948ac8 BK |
940 | for (i = 0; i < s->shared_sigalgslen; i++) { |
941 | if (check_md == s->shared_sigalgs[i]->sigandhash) | |
4a1b4280 DSH |
942 | return 1;; |
943 | } | |
944 | return 0; | |
0f113f3e | 945 | } |
4a1b4280 | 946 | return 1; |
0f113f3e MC |
947 | } |
948 | ||
6977e8ee | 949 | /* |
8483a003 | 950 | * tls1_check_ec_tmp_key - Check EC temporary key compatibility |
6977e8ee KR |
951 | * @s: SSL connection |
952 | * @cid: Cipher ID we're considering using | |
953 | * | |
954 | * Checks that the kECDHE cipher suite we're considering using | |
955 | * is compatible with the client extensions. | |
956 | * | |
957 | * Returns 0 when the cipher can't be used or 1 when it can. | |
958 | */ | |
2ea80354 | 959 | int tls1_check_ec_tmp_key(SSL *s, unsigned long cid) |
0f113f3e | 960 | { |
4a1b4280 DSH |
961 | /* If not Suite B just need a shared group */ |
962 | if (!tls1_suiteb(s)) | |
963 | return tls1_shared_group(s, 0) != 0; | |
0f113f3e MC |
964 | /* |
965 | * If Suite B, AES128 MUST use P-256 and AES256 MUST use P-384, no other | |
966 | * curves permitted. | |
967 | */ | |
4a1b4280 | 968 | if (cid == TLS1_CK_ECDHE_ECDSA_WITH_AES_128_GCM_SHA256) |
dcf8b01f | 969 | return tls1_check_group_id(s, TLSEXT_curve_P_256, 1); |
4a1b4280 | 970 | if (cid == TLS1_CK_ECDHE_ECDSA_WITH_AES_256_GCM_SHA384) |
dcf8b01f | 971 | return tls1_check_group_id(s, TLSEXT_curve_P_384, 1); |
4a1b4280 DSH |
972 | |
973 | return 0; | |
0f113f3e | 974 | } |
d0595f17 | 975 | |
703bcee0 | 976 | /* Default sigalg schemes */ |
98c792d1 | 977 | static const uint16_t tls12_sigalgs[] = { |
703bcee0 MC |
978 | TLSEXT_SIGALG_ecdsa_secp256r1_sha256, |
979 | TLSEXT_SIGALG_ecdsa_secp384r1_sha384, | |
980 | TLSEXT_SIGALG_ecdsa_secp521r1_sha512, | |
3d234c9e | 981 | TLSEXT_SIGALG_ed25519, |
0e1d6ecf | 982 | TLSEXT_SIGALG_ed448, |
0f113f3e | 983 | |
f55e99f7 BK |
984 | TLSEXT_SIGALG_rsa_pss_pss_sha256, |
985 | TLSEXT_SIGALG_rsa_pss_pss_sha384, | |
986 | TLSEXT_SIGALG_rsa_pss_pss_sha512, | |
987 | TLSEXT_SIGALG_rsa_pss_rsae_sha256, | |
988 | TLSEXT_SIGALG_rsa_pss_rsae_sha384, | |
989 | TLSEXT_SIGALG_rsa_pss_rsae_sha512, | |
536199ec | 990 | |
703bcee0 MC |
991 | TLSEXT_SIGALG_rsa_pkcs1_sha256, |
992 | TLSEXT_SIGALG_rsa_pkcs1_sha384, | |
993 | TLSEXT_SIGALG_rsa_pkcs1_sha512, | |
0f113f3e | 994 | |
d8311fc9 | 995 | TLSEXT_SIGALG_ecdsa_sha224, |
42ab2230 | 996 | TLSEXT_SIGALG_ecdsa_sha1, |
462f4f4b | 997 | |
d8311fc9 | 998 | TLSEXT_SIGALG_rsa_pkcs1_sha224, |
42ab2230 | 999 | TLSEXT_SIGALG_rsa_pkcs1_sha1, |
e376242d | 1000 | |
d8311fc9 | 1001 | TLSEXT_SIGALG_dsa_sha224, |
42ab2230 MC |
1002 | TLSEXT_SIGALG_dsa_sha1, |
1003 | ||
703bcee0 MC |
1004 | TLSEXT_SIGALG_dsa_sha256, |
1005 | TLSEXT_SIGALG_dsa_sha384, | |
41f10305 | 1006 | TLSEXT_SIGALG_dsa_sha512, |
e376242d | 1007 | |
41f10305 | 1008 | #ifndef OPENSSL_NO_GOST |
6f892296 NM |
1009 | TLSEXT_SIGALG_gostr34102012_256_intrinsic, |
1010 | TLSEXT_SIGALG_gostr34102012_512_intrinsic, | |
41f10305 DB |
1011 | TLSEXT_SIGALG_gostr34102012_256_gostr34112012_256, |
1012 | TLSEXT_SIGALG_gostr34102012_512_gostr34112012_512, | |
1013 | TLSEXT_SIGALG_gostr34102001_gostr3411, | |
5eeb6c6e | 1014 | #endif |
fc101f88 | 1015 | }; |
0f113f3e | 1016 | |
462f4f4b | 1017 | |
98c792d1 | 1018 | static const uint16_t suiteb_sigalgs[] = { |
703bcee0 MC |
1019 | TLSEXT_SIGALG_ecdsa_secp256r1_sha256, |
1020 | TLSEXT_SIGALG_ecdsa_secp384r1_sha384 | |
2ea80354 | 1021 | }; |
aff8c126 | 1022 | |
7a531ee4 | 1023 | static const SIGALG_LOOKUP sigalg_lookup_tbl[] = { |
edbfba1a | 1024 | {"ecdsa_secp256r1_sha256", TLSEXT_SIGALG_ecdsa_secp256r1_sha256, |
17ae384e | 1025 | NID_sha256, SSL_MD_SHA256_IDX, EVP_PKEY_EC, SSL_PKEY_ECC, |
263ff2c9 | 1026 | NID_ecdsa_with_SHA256, NID_X9_62_prime256v1, 1}, |
edbfba1a | 1027 | {"ecdsa_secp384r1_sha384", TLSEXT_SIGALG_ecdsa_secp384r1_sha384, |
17ae384e | 1028 | NID_sha384, SSL_MD_SHA384_IDX, EVP_PKEY_EC, SSL_PKEY_ECC, |
263ff2c9 | 1029 | NID_ecdsa_with_SHA384, NID_secp384r1, 1}, |
edbfba1a | 1030 | {"ecdsa_secp521r1_sha512", TLSEXT_SIGALG_ecdsa_secp521r1_sha512, |
17ae384e | 1031 | NID_sha512, SSL_MD_SHA512_IDX, EVP_PKEY_EC, SSL_PKEY_ECC, |
263ff2c9 | 1032 | NID_ecdsa_with_SHA512, NID_secp521r1, 1}, |
b04d4e38 | 1033 | {"ed25519", TLSEXT_SIGALG_ed25519, |
d2916a5b | 1034 | NID_undef, -1, EVP_PKEY_ED25519, SSL_PKEY_ED25519, |
263ff2c9 | 1035 | NID_undef, NID_undef, 1}, |
0e1d6ecf MC |
1036 | {"ed448", TLSEXT_SIGALG_ed448, |
1037 | NID_undef, -1, EVP_PKEY_ED448, SSL_PKEY_ED448, | |
263ff2c9 | 1038 | NID_undef, NID_undef, 1}, |
d8311fc9 MC |
1039 | {NULL, TLSEXT_SIGALG_ecdsa_sha224, |
1040 | NID_sha224, SSL_MD_SHA224_IDX, EVP_PKEY_EC, SSL_PKEY_ECC, | |
263ff2c9 | 1041 | NID_ecdsa_with_SHA224, NID_undef, 1}, |
edbfba1a | 1042 | {NULL, TLSEXT_SIGALG_ecdsa_sha1, |
17ae384e | 1043 | NID_sha1, SSL_MD_SHA1_IDX, EVP_PKEY_EC, SSL_PKEY_ECC, |
263ff2c9 | 1044 | NID_ecdsa_with_SHA1, NID_undef, 1}, |
f55e99f7 BK |
1045 | {"rsa_pss_rsae_sha256", TLSEXT_SIGALG_rsa_pss_rsae_sha256, |
1046 | NID_sha256, SSL_MD_SHA256_IDX, EVP_PKEY_RSA_PSS, SSL_PKEY_RSA, | |
263ff2c9 | 1047 | NID_undef, NID_undef, 1}, |
f55e99f7 BK |
1048 | {"rsa_pss_rsae_sha384", TLSEXT_SIGALG_rsa_pss_rsae_sha384, |
1049 | NID_sha384, SSL_MD_SHA384_IDX, EVP_PKEY_RSA_PSS, SSL_PKEY_RSA, | |
263ff2c9 | 1050 | NID_undef, NID_undef, 1}, |
f55e99f7 BK |
1051 | {"rsa_pss_rsae_sha512", TLSEXT_SIGALG_rsa_pss_rsae_sha512, |
1052 | NID_sha512, SSL_MD_SHA512_IDX, EVP_PKEY_RSA_PSS, SSL_PKEY_RSA, | |
263ff2c9 | 1053 | NID_undef, NID_undef, 1}, |
f55e99f7 | 1054 | {"rsa_pss_pss_sha256", TLSEXT_SIGALG_rsa_pss_pss_sha256, |
17ae384e | 1055 | NID_sha256, SSL_MD_SHA256_IDX, EVP_PKEY_RSA_PSS, SSL_PKEY_RSA_PSS_SIGN, |
263ff2c9 | 1056 | NID_undef, NID_undef, 1}, |
f55e99f7 | 1057 | {"rsa_pss_pss_sha384", TLSEXT_SIGALG_rsa_pss_pss_sha384, |
17ae384e | 1058 | NID_sha384, SSL_MD_SHA384_IDX, EVP_PKEY_RSA_PSS, SSL_PKEY_RSA_PSS_SIGN, |
263ff2c9 | 1059 | NID_undef, NID_undef, 1}, |
f55e99f7 | 1060 | {"rsa_pss_pss_sha512", TLSEXT_SIGALG_rsa_pss_pss_sha512, |
17ae384e | 1061 | NID_sha512, SSL_MD_SHA512_IDX, EVP_PKEY_RSA_PSS, SSL_PKEY_RSA_PSS_SIGN, |
263ff2c9 | 1062 | NID_undef, NID_undef, 1}, |
edbfba1a | 1063 | {"rsa_pkcs1_sha256", TLSEXT_SIGALG_rsa_pkcs1_sha256, |
d0ff28f8 | 1064 | NID_sha256, SSL_MD_SHA256_IDX, EVP_PKEY_RSA, SSL_PKEY_RSA, |
263ff2c9 | 1065 | NID_sha256WithRSAEncryption, NID_undef, 1}, |
edbfba1a | 1066 | {"rsa_pkcs1_sha384", TLSEXT_SIGALG_rsa_pkcs1_sha384, |
d0ff28f8 | 1067 | NID_sha384, SSL_MD_SHA384_IDX, EVP_PKEY_RSA, SSL_PKEY_RSA, |
263ff2c9 | 1068 | NID_sha384WithRSAEncryption, NID_undef, 1}, |
edbfba1a | 1069 | {"rsa_pkcs1_sha512", TLSEXT_SIGALG_rsa_pkcs1_sha512, |
d0ff28f8 | 1070 | NID_sha512, SSL_MD_SHA512_IDX, EVP_PKEY_RSA, SSL_PKEY_RSA, |
263ff2c9 | 1071 | NID_sha512WithRSAEncryption, NID_undef, 1}, |
d8311fc9 MC |
1072 | {"rsa_pkcs1_sha224", TLSEXT_SIGALG_rsa_pkcs1_sha224, |
1073 | NID_sha224, SSL_MD_SHA224_IDX, EVP_PKEY_RSA, SSL_PKEY_RSA, | |
263ff2c9 | 1074 | NID_sha224WithRSAEncryption, NID_undef, 1}, |
edbfba1a | 1075 | {"rsa_pkcs1_sha1", TLSEXT_SIGALG_rsa_pkcs1_sha1, |
d0ff28f8 | 1076 | NID_sha1, SSL_MD_SHA1_IDX, EVP_PKEY_RSA, SSL_PKEY_RSA, |
263ff2c9 | 1077 | NID_sha1WithRSAEncryption, NID_undef, 1}, |
edbfba1a | 1078 | {NULL, TLSEXT_SIGALG_dsa_sha256, |
17ae384e | 1079 | NID_sha256, SSL_MD_SHA256_IDX, EVP_PKEY_DSA, SSL_PKEY_DSA_SIGN, |
263ff2c9 | 1080 | NID_dsa_with_SHA256, NID_undef, 1}, |
edbfba1a | 1081 | {NULL, TLSEXT_SIGALG_dsa_sha384, |
17ae384e | 1082 | NID_sha384, SSL_MD_SHA384_IDX, EVP_PKEY_DSA, SSL_PKEY_DSA_SIGN, |
263ff2c9 | 1083 | NID_undef, NID_undef, 1}, |
edbfba1a | 1084 | {NULL, TLSEXT_SIGALG_dsa_sha512, |
17ae384e | 1085 | NID_sha512, SSL_MD_SHA512_IDX, EVP_PKEY_DSA, SSL_PKEY_DSA_SIGN, |
263ff2c9 | 1086 | NID_undef, NID_undef, 1}, |
d8311fc9 MC |
1087 | {NULL, TLSEXT_SIGALG_dsa_sha224, |
1088 | NID_sha224, SSL_MD_SHA224_IDX, EVP_PKEY_DSA, SSL_PKEY_DSA_SIGN, | |
263ff2c9 | 1089 | NID_undef, NID_undef, 1}, |
edbfba1a | 1090 | {NULL, TLSEXT_SIGALG_dsa_sha1, |
17ae384e | 1091 | NID_sha1, SSL_MD_SHA1_IDX, EVP_PKEY_DSA, SSL_PKEY_DSA_SIGN, |
263ff2c9 | 1092 | NID_dsaWithSHA1, NID_undef, 1}, |
5eeb6c6e | 1093 | #ifndef OPENSSL_NO_GOST |
6f892296 NM |
1094 | {NULL, TLSEXT_SIGALG_gostr34102012_256_intrinsic, |
1095 | NID_id_GostR3411_2012_256, SSL_MD_GOST12_256_IDX, | |
1096 | NID_id_GostR3410_2012_256, SSL_PKEY_GOST12_256, | |
263ff2c9 | 1097 | NID_undef, NID_undef, 1}, |
6f892296 NM |
1098 | {NULL, TLSEXT_SIGALG_gostr34102012_512_intrinsic, |
1099 | NID_id_GostR3411_2012_512, SSL_MD_GOST12_512_IDX, | |
1100 | NID_id_GostR3410_2012_512, SSL_PKEY_GOST12_512, | |
263ff2c9 | 1101 | NID_undef, NID_undef, 1}, |
edbfba1a | 1102 | {NULL, TLSEXT_SIGALG_gostr34102012_256_gostr34112012_256, |
17ae384e DSH |
1103 | NID_id_GostR3411_2012_256, SSL_MD_GOST12_256_IDX, |
1104 | NID_id_GostR3410_2012_256, SSL_PKEY_GOST12_256, | |
263ff2c9 | 1105 | NID_undef, NID_undef, 1}, |
edbfba1a | 1106 | {NULL, TLSEXT_SIGALG_gostr34102012_512_gostr34112012_512, |
17ae384e DSH |
1107 | NID_id_GostR3411_2012_512, SSL_MD_GOST12_512_IDX, |
1108 | NID_id_GostR3410_2012_512, SSL_PKEY_GOST12_512, | |
263ff2c9 | 1109 | NID_undef, NID_undef, 1}, |
edbfba1a | 1110 | {NULL, TLSEXT_SIGALG_gostr34102001_gostr3411, |
17ae384e DSH |
1111 | NID_id_GostR3411_94, SSL_MD_GOST94_IDX, |
1112 | NID_id_GostR3410_2001, SSL_PKEY_GOST01, | |
263ff2c9 | 1113 | NID_undef, NID_undef, 1} |
5eeb6c6e | 1114 | #endif |
703bcee0 | 1115 | }; |
0972bc5c DSH |
1116 | /* Legacy sigalgs for TLS < 1.2 RSA TLS signatures */ |
1117 | static const SIGALG_LOOKUP legacy_rsa_sigalg = { | |
1118 | "rsa_pkcs1_md5_sha1", 0, | |
1119 | NID_md5_sha1, SSL_MD_MD5_SHA1_IDX, | |
1120 | EVP_PKEY_RSA, SSL_PKEY_RSA, | |
263ff2c9 | 1121 | NID_undef, NID_undef, 1 |
0972bc5c DSH |
1122 | }; |
1123 | ||
1124 | /* | |
1125 | * Default signature algorithm values used if signature algorithms not present. | |
1126 | * From RFC5246. Note: order must match certificate index order. | |
1127 | */ | |
1128 | static const uint16_t tls_default_sigalg[] = { | |
1129 | TLSEXT_SIGALG_rsa_pkcs1_sha1, /* SSL_PKEY_RSA */ | |
045d078a | 1130 | 0, /* SSL_PKEY_RSA_PSS_SIGN */ |
0972bc5c DSH |
1131 | TLSEXT_SIGALG_dsa_sha1, /* SSL_PKEY_DSA_SIGN */ |
1132 | TLSEXT_SIGALG_ecdsa_sha1, /* SSL_PKEY_ECC */ | |
1133 | TLSEXT_SIGALG_gostr34102001_gostr3411, /* SSL_PKEY_GOST01 */ | |
6f892296 NM |
1134 | TLSEXT_SIGALG_gostr34102012_256_intrinsic, /* SSL_PKEY_GOST12_256 */ |
1135 | TLSEXT_SIGALG_gostr34102012_512_intrinsic, /* SSL_PKEY_GOST12_512 */ | |
0e1d6ecf MC |
1136 | 0, /* SSL_PKEY_ED25519 */ |
1137 | 0, /* SSL_PKEY_ED448 */ | |
0972bc5c | 1138 | }; |
703bcee0 | 1139 | |
263ff2c9 MC |
1140 | int ssl_setup_sig_algs(SSL_CTX *ctx) |
1141 | { | |
1142 | size_t i; | |
1143 | const SIGALG_LOOKUP *lu; | |
1144 | SIGALG_LOOKUP *cache | |
1145 | = OPENSSL_malloc(sizeof(*lu) * OSSL_NELEM(sigalg_lookup_tbl)); | |
1146 | EVP_PKEY *tmpkey = EVP_PKEY_new(); | |
1147 | int ret = 0; | |
1148 | ||
1149 | if (cache == NULL || tmpkey == NULL) | |
1150 | goto err; | |
1151 | ||
1152 | ERR_set_mark(); | |
1153 | for (i = 0, lu = sigalg_lookup_tbl; | |
1154 | i < OSSL_NELEM(sigalg_lookup_tbl); lu++, i++) { | |
1155 | EVP_PKEY_CTX *pctx; | |
1156 | ||
1157 | cache[i] = *lu; | |
1158 | ||
1159 | /* | |
1160 | * Check hash is available. | |
57e7401f | 1161 | * This test is not perfect. A provider could have support |
263ff2c9 MC |
1162 | * for a signature scheme, but not a particular hash. However the hash |
1163 | * could be available from some other loaded provider. In that case it | |
1164 | * could be that the signature is available, and the hash is available | |
1165 | * independently - but not as a combination. We ignore this for now. | |
1166 | */ | |
1167 | if (lu->hash != NID_undef | |
1168 | && ctx->ssl_digest_methods[lu->hash_idx] == NULL) { | |
1169 | cache[i].enabled = 0; | |
1170 | continue; | |
1171 | } | |
1172 | ||
1173 | if (!EVP_PKEY_set_type(tmpkey, lu->sig)) { | |
1174 | cache[i].enabled = 0; | |
1175 | continue; | |
1176 | } | |
1177 | pctx = EVP_PKEY_CTX_new_from_pkey(ctx->libctx, tmpkey, ctx->propq); | |
1178 | /* If unable to create pctx we assume the sig algorithm is unavailable */ | |
1179 | if (pctx == NULL) | |
1180 | cache[i].enabled = 0; | |
1181 | EVP_PKEY_CTX_free(pctx); | |
1182 | } | |
1183 | ERR_pop_to_mark(); | |
1184 | ctx->sigalg_lookup_cache = cache; | |
1185 | cache = NULL; | |
1186 | ||
1187 | ret = 1; | |
1188 | err: | |
1189 | OPENSSL_free(cache); | |
1190 | EVP_PKEY_free(tmpkey); | |
1191 | return ret; | |
1192 | } | |
1193 | ||
4d43ee28 | 1194 | /* Lookup TLS signature algorithm */ |
263ff2c9 | 1195 | static const SIGALG_LOOKUP *tls1_lookup_sigalg(const SSL *s, uint16_t sigalg) |
703bcee0 MC |
1196 | { |
1197 | size_t i; | |
263ff2c9 | 1198 | const SIGALG_LOOKUP *lu; |
703bcee0 | 1199 | |
263ff2c9 MC |
1200 | for (i = 0, lu = s->ctx->sigalg_lookup_cache; |
1201 | /* cache should have the same number of elements as sigalg_lookup_tbl */ | |
1202 | i < OSSL_NELEM(sigalg_lookup_tbl); | |
1203 | lu++, i++) { | |
54e3efff MC |
1204 | if (lu->sigalg == sigalg) { |
1205 | if (!lu->enabled) | |
1206 | return NULL; | |
263ff2c9 | 1207 | return lu; |
54e3efff | 1208 | } |
703bcee0 | 1209 | } |
4d43ee28 DSH |
1210 | return NULL; |
1211 | } | |
168067b6 | 1212 | /* Lookup hash: return 0 if invalid or not enabled */ |
c8f6c28a | 1213 | int tls1_lookup_md(SSL_CTX *ctx, const SIGALG_LOOKUP *lu, const EVP_MD **pmd) |
168067b6 DSH |
1214 | { |
1215 | const EVP_MD *md; | |
1216 | if (lu == NULL) | |
1217 | return 0; | |
1218 | /* lu->hash == NID_undef means no associated digest */ | |
1219 | if (lu->hash == NID_undef) { | |
1220 | md = NULL; | |
1221 | } else { | |
c8f6c28a | 1222 | md = ssl_md(ctx, lu->hash_idx); |
168067b6 DSH |
1223 | if (md == NULL) |
1224 | return 0; | |
1225 | } | |
1226 | if (pmd) | |
1227 | *pmd = md; | |
1228 | return 1; | |
1229 | } | |
1230 | ||
0fe3db25 NR |
1231 | /* |
1232 | * Check if key is large enough to generate RSA-PSS signature. | |
1233 | * | |
1234 | * The key must greater than or equal to 2 * hash length + 2. | |
1235 | * SHA512 has a hash length of 64 bytes, which is incompatible | |
1236 | * with a 128 byte (1024 bit) key. | |
1237 | */ | |
ed576acd | 1238 | #define RSA_PSS_MINIMUM_KEY_SIZE(md) (2 * EVP_MD_get_size(md) + 2) |
c5f87134 | 1239 | static int rsa_pss_check_min_key_size(SSL_CTX *ctx, const EVP_PKEY *pkey, |
c8f6c28a | 1240 | const SIGALG_LOOKUP *lu) |
0fe3db25 NR |
1241 | { |
1242 | const EVP_MD *md; | |
1243 | ||
c5f87134 | 1244 | if (pkey == NULL) |
0fe3db25 | 1245 | return 0; |
c8f6c28a | 1246 | if (!tls1_lookup_md(ctx, lu, &md) || md == NULL) |
0fe3db25 | 1247 | return 0; |
ed576acd | 1248 | if (EVP_PKEY_get_size(pkey) < RSA_PSS_MINIMUM_KEY_SIZE(md)) |
0fe3db25 NR |
1249 | return 0; |
1250 | return 1; | |
1251 | } | |
1252 | ||
0972bc5c | 1253 | /* |
b0031e5d KR |
1254 | * Returns a signature algorithm when the peer did not send a list of supported |
1255 | * signature algorithms. The signature algorithm is fixed for the certificate | |
1256 | * type. |idx| is a certificate type index (SSL_PKEY_*). When |idx| is -1 the | |
1257 | * certificate type from |s| will be used. | |
1258 | * Returns the signature algorithm to use, or NULL on error. | |
0972bc5c DSH |
1259 | */ |
1260 | static const SIGALG_LOOKUP *tls1_get_legacy_sigalg(const SSL *s, int idx) | |
1261 | { | |
7f6b466b DSH |
1262 | if (idx == -1) { |
1263 | if (s->server) { | |
1264 | size_t i; | |
1265 | ||
1266 | /* Work out index corresponding to ciphersuite */ | |
1267 | for (i = 0; i < SSL_PKEY_NUM; i++) { | |
1268 | const SSL_CERT_LOOKUP *clu = ssl_cert_lookup_by_idx(i); | |
1269 | ||
555cbb32 | 1270 | if (clu->amask & s->s3.tmp.new_cipher->algorithm_auth) { |
7f6b466b DSH |
1271 | idx = i; |
1272 | break; | |
1273 | } | |
1274 | } | |
1f65c045 DB |
1275 | |
1276 | /* | |
1277 | * Some GOST ciphersuites allow more than one signature algorithms | |
1278 | * */ | |
555cbb32 | 1279 | if (idx == SSL_PKEY_GOST01 && s->s3.tmp.new_cipher->algorithm_auth != SSL_aGOST01) { |
1f65c045 DB |
1280 | int real_idx; |
1281 | ||
1282 | for (real_idx = SSL_PKEY_GOST12_512; real_idx >= SSL_PKEY_GOST01; | |
1283 | real_idx--) { | |
1284 | if (s->cert->pkeys[real_idx].privatekey != NULL) { | |
1285 | idx = real_idx; | |
1286 | break; | |
1287 | } | |
1288 | } | |
1289 | } | |
5a5530a2 DB |
1290 | /* |
1291 | * As both SSL_PKEY_GOST12_512 and SSL_PKEY_GOST12_256 indices can be used | |
1292 | * with new (aGOST12-only) ciphersuites, we should find out which one is available really. | |
1293 | */ | |
1294 | else if (idx == SSL_PKEY_GOST12_256) { | |
1295 | int real_idx; | |
1296 | ||
1297 | for (real_idx = SSL_PKEY_GOST12_512; real_idx >= SSL_PKEY_GOST12_256; | |
1298 | real_idx--) { | |
1299 | if (s->cert->pkeys[real_idx].privatekey != NULL) { | |
1300 | idx = real_idx; | |
1301 | break; | |
1302 | } | |
1303 | } | |
1304 | } | |
7f6b466b DSH |
1305 | } else { |
1306 | idx = s->cert->key - s->cert->pkeys; | |
1307 | } | |
1308 | } | |
0972bc5c DSH |
1309 | if (idx < 0 || idx >= (int)OSSL_NELEM(tls_default_sigalg)) |
1310 | return NULL; | |
1311 | if (SSL_USE_SIGALGS(s) || idx != SSL_PKEY_RSA) { | |
263ff2c9 | 1312 | const SIGALG_LOOKUP *lu = tls1_lookup_sigalg(s, tls_default_sigalg[idx]); |
0972bc5c | 1313 | |
54e3efff MC |
1314 | if (lu == NULL) |
1315 | return NULL; | |
c8f6c28a | 1316 | if (!tls1_lookup_md(s->ctx, lu, NULL)) |
0972bc5c | 1317 | return NULL; |
b0031e5d KR |
1318 | if (!tls12_sigalg_allowed(s, SSL_SECOP_SIGALG_SUPPORTED, lu)) |
1319 | return NULL; | |
0972bc5c DSH |
1320 | return lu; |
1321 | } | |
b0031e5d KR |
1322 | if (!tls12_sigalg_allowed(s, SSL_SECOP_SIGALG_SUPPORTED, &legacy_rsa_sigalg)) |
1323 | return NULL; | |
0972bc5c DSH |
1324 | return &legacy_rsa_sigalg; |
1325 | } | |
1326 | /* Set peer sigalg based key type */ | |
1327 | int tls1_set_peer_legacy_sigalg(SSL *s, const EVP_PKEY *pkey) | |
1328 | { | |
52fd27f9 DSH |
1329 | size_t idx; |
1330 | const SIGALG_LOOKUP *lu; | |
0972bc5c | 1331 | |
52fd27f9 DSH |
1332 | if (ssl_cert_lookup_by_pkey(pkey, &idx) == NULL) |
1333 | return 0; | |
1334 | lu = tls1_get_legacy_sigalg(s, idx); | |
0972bc5c DSH |
1335 | if (lu == NULL) |
1336 | return 0; | |
555cbb32 | 1337 | s->s3.tmp.peer_sigalg = lu; |
0972bc5c DSH |
1338 | return 1; |
1339 | } | |
703bcee0 | 1340 | |
98c792d1 | 1341 | size_t tls12_get_psigalgs(SSL *s, int sent, const uint16_t **psigs) |
0f113f3e MC |
1342 | { |
1343 | /* | |
1344 | * If Suite B mode use Suite B sigalgs only, ignore any other | |
1345 | * preferences. | |
1346 | */ | |
0f113f3e MC |
1347 | switch (tls1_suiteb(s)) { |
1348 | case SSL_CERT_FLAG_SUITEB_128_LOS: | |
1349 | *psigs = suiteb_sigalgs; | |
7a531ee4 | 1350 | return OSSL_NELEM(suiteb_sigalgs); |
0f113f3e MC |
1351 | |
1352 | case SSL_CERT_FLAG_SUITEB_128_LOS_ONLY: | |
1353 | *psigs = suiteb_sigalgs; | |
7a531ee4 | 1354 | return 1; |
0f113f3e MC |
1355 | |
1356 | case SSL_CERT_FLAG_SUITEB_192_LOS: | |
7a531ee4 MC |
1357 | *psigs = suiteb_sigalgs + 1; |
1358 | return 1; | |
0f113f3e | 1359 | } |
a9669ddc DSH |
1360 | /* |
1361 | * We use client_sigalgs (if not NULL) if we're a server | |
1362 | * and sending a certificate request or if we're a client and | |
1363 | * determining which shared algorithm to use. | |
1364 | */ | |
1365 | if ((s->server == sent) && s->cert->client_sigalgs != NULL) { | |
0f113f3e MC |
1366 | *psigs = s->cert->client_sigalgs; |
1367 | return s->cert->client_sigalgslen; | |
1368 | } else if (s->cert->conf_sigalgs) { | |
1369 | *psigs = s->cert->conf_sigalgs; | |
1370 | return s->cert->conf_sigalgslen; | |
1371 | } else { | |
1372 | *psigs = tls12_sigalgs; | |
703bcee0 | 1373 | return OSSL_NELEM(tls12_sigalgs); |
0f113f3e MC |
1374 | } |
1375 | } | |
1376 | ||
de4dc598 MC |
1377 | /* |
1378 | * Called by servers only. Checks that we have a sig alg that supports the | |
1379 | * specified EC curve. | |
1380 | */ | |
1381 | int tls_check_sigalg_curve(const SSL *s, int curve) | |
1382 | { | |
1383 | const uint16_t *sigs; | |
1384 | size_t siglen, i; | |
1385 | ||
1386 | if (s->cert->conf_sigalgs) { | |
1387 | sigs = s->cert->conf_sigalgs; | |
1388 | siglen = s->cert->conf_sigalgslen; | |
1389 | } else { | |
1390 | sigs = tls12_sigalgs; | |
1391 | siglen = OSSL_NELEM(tls12_sigalgs); | |
1392 | } | |
1393 | ||
1394 | for (i = 0; i < siglen; i++) { | |
263ff2c9 | 1395 | const SIGALG_LOOKUP *lu = tls1_lookup_sigalg(s, sigs[i]); |
de4dc598 MC |
1396 | |
1397 | if (lu == NULL) | |
1398 | continue; | |
1399 | if (lu->sig == EVP_PKEY_EC | |
1400 | && lu->curve != NID_undef | |
1401 | && curve == lu->curve) | |
1402 | return 1; | |
1403 | } | |
1404 | ||
1405 | return 0; | |
1406 | } | |
1407 | ||
620c97b6 KR |
1408 | /* |
1409 | * Return the number of security bits for the signature algorithm, or 0 on | |
1410 | * error. | |
1411 | */ | |
1412 | static int sigalg_security_bits(SSL_CTX *ctx, const SIGALG_LOOKUP *lu) | |
1413 | { | |
1414 | const EVP_MD *md = NULL; | |
1415 | int secbits = 0; | |
1416 | ||
1417 | if (!tls1_lookup_md(ctx, lu, &md)) | |
1418 | return 0; | |
1419 | if (md != NULL) | |
1420 | { | |
ed576acd | 1421 | int md_type = EVP_MD_get_type(md); |
aba03ae5 | 1422 | |
620c97b6 | 1423 | /* Security bits: half digest bits */ |
ed576acd | 1424 | secbits = EVP_MD_get_size(md) * 4; |
aba03ae5 KR |
1425 | /* |
1426 | * SHA1 and MD5 are known to be broken. Reduce security bits so that | |
1427 | * they're no longer accepted at security level 1. The real values don't | |
1428 | * really matter as long as they're lower than 80, which is our | |
1429 | * security level 1. | |
1430 | * https://eprint.iacr.org/2020/014 puts a chosen-prefix attack for | |
1431 | * SHA1 at 2^63.4 and MD5+SHA1 at 2^67.2 | |
1432 | * https://documents.epfl.ch/users/l/le/lenstra/public/papers/lat.pdf | |
1433 | * puts a chosen-prefix attack for MD5 at 2^39. | |
5ea4d764 | 1434 | */ |
aba03ae5 KR |
1435 | if (md_type == NID_sha1) |
1436 | secbits = 64; | |
1437 | else if (md_type == NID_md5_sha1) | |
1438 | secbits = 67; | |
1439 | else if (md_type == NID_md5) | |
1440 | secbits = 39; | |
620c97b6 KR |
1441 | } else { |
1442 | /* Values from https://tools.ietf.org/html/rfc8032#section-8.5 */ | |
1443 | if (lu->sigalg == TLSEXT_SIGALG_ed25519) | |
1444 | secbits = 128; | |
1445 | else if (lu->sigalg == TLSEXT_SIGALG_ed448) | |
1446 | secbits = 224; | |
1447 | } | |
1448 | return secbits; | |
1449 | } | |
1450 | ||
0f113f3e MC |
1451 | /* |
1452 | * Check signature algorithm is consistent with sent supported signature | |
b2eb6998 DSH |
1453 | * algorithms and if so set relevant digest and signature scheme in |
1454 | * s. | |
ec4a50b3 | 1455 | */ |
f742cda8 | 1456 | int tls12_check_peer_sigalg(SSL *s, uint16_t sig, EVP_PKEY *pkey) |
0f113f3e | 1457 | { |
98c792d1 | 1458 | const uint16_t *sent_sigs; |
5554facb | 1459 | const EVP_MD *md = NULL; |
703bcee0 | 1460 | char sigalgstr[2]; |
11d2641f | 1461 | size_t sent_sigslen, i, cidx; |
c2041da8 | 1462 | int pkeyid = -1; |
f742cda8 | 1463 | const SIGALG_LOOKUP *lu; |
620c97b6 | 1464 | int secbits = 0; |
4d43ee28 | 1465 | |
ed576acd | 1466 | pkeyid = EVP_PKEY_get_id(pkey); |
0f113f3e | 1467 | /* Should never happen */ |
536199ec | 1468 | if (pkeyid == -1) |
0f113f3e | 1469 | return -1; |
5a8916d9 DSH |
1470 | if (SSL_IS_TLS13(s)) { |
1471 | /* Disallow DSA for TLS 1.3 */ | |
1472 | if (pkeyid == EVP_PKEY_DSA) { | |
c48ffbcc | 1473 | SSLfatal(s, SSL_AD_ILLEGAL_PARAMETER, SSL_R_WRONG_SIGNATURE_TYPE); |
5a8916d9 DSH |
1474 | return 0; |
1475 | } | |
1476 | /* Only allow PSS for TLS 1.3 */ | |
1477 | if (pkeyid == EVP_PKEY_RSA) | |
1478 | pkeyid = EVP_PKEY_RSA_PSS; | |
1479 | } | |
263ff2c9 | 1480 | lu = tls1_lookup_sigalg(s, sig); |
f742cda8 | 1481 | /* |
d8311fc9 MC |
1482 | * Check sigalgs is known. Disallow SHA1/SHA224 with TLS 1.3. Check key type |
1483 | * is consistent with signature: RSA keys can be used for RSA-PSS | |
f742cda8 | 1484 | */ |
d8311fc9 MC |
1485 | if (lu == NULL |
1486 | || (SSL_IS_TLS13(s) && (lu->hash == NID_sha1 || lu->hash == NID_sha224)) | |
095a982b | 1487 | || (pkeyid != lu->sig |
f742cda8 | 1488 | && (lu->sig != EVP_PKEY_RSA_PSS || pkeyid != EVP_PKEY_RSA))) { |
c48ffbcc | 1489 | SSLfatal(s, SSL_AD_ILLEGAL_PARAMETER, SSL_R_WRONG_SIGNATURE_TYPE); |
0f113f3e MC |
1490 | return 0; |
1491 | } | |
11d2641f | 1492 | /* Check the sigalg is consistent with the key OID */ |
ed576acd | 1493 | if (!ssl_cert_lookup_by_nid(EVP_PKEY_get_id(pkey), &cidx) |
11d2641f | 1494 | || lu->sig_idx != (int)cidx) { |
c48ffbcc | 1495 | SSLfatal(s, SSL_AD_ILLEGAL_PARAMETER, SSL_R_WRONG_SIGNATURE_TYPE); |
11d2641f MC |
1496 | return 0; |
1497 | } | |
1498 | ||
fe3066ee | 1499 | if (pkeyid == EVP_PKEY_EC) { |
44b6318f | 1500 | |
4a1b4280 DSH |
1501 | /* Check point compression is permitted */ |
1502 | if (!tls1_check_pkey_comp(s, pkey)) { | |
f63a17d6 | 1503 | SSLfatal(s, SSL_AD_ILLEGAL_PARAMETER, |
f63a17d6 | 1504 | SSL_R_ILLEGAL_POINT_COMPRESSION); |
4a1b4280 DSH |
1505 | return 0; |
1506 | } | |
1507 | ||
1508 | /* For TLS 1.3 or Suite B check curve matches signature algorithm */ | |
1509 | if (SSL_IS_TLS13(s) || tls1_suiteb(s)) { | |
d8975dec | 1510 | int curve = ssl_get_EC_curve_nid(pkey); |
4a1b4280 | 1511 | |
a34a9df0 | 1512 | if (lu->curve != NID_undef && curve != lu->curve) { |
c48ffbcc | 1513 | SSLfatal(s, SSL_AD_ILLEGAL_PARAMETER, SSL_R_WRONG_CURVE); |
8f88cb53 DSH |
1514 | return 0; |
1515 | } | |
4a1b4280 DSH |
1516 | } |
1517 | if (!SSL_IS_TLS13(s)) { | |
1518 | /* Check curve matches extensions */ | |
dcf8b01f | 1519 | if (!tls1_check_group_id(s, tls1_get_group_id(pkey), 1)) { |
c48ffbcc | 1520 | SSLfatal(s, SSL_AD_ILLEGAL_PARAMETER, SSL_R_WRONG_CURVE); |
8f88cb53 DSH |
1521 | return 0; |
1522 | } | |
8f88cb53 | 1523 | if (tls1_suiteb(s)) { |
f1adb006 DSH |
1524 | /* Check sigalg matches a permissible Suite B value */ |
1525 | if (sig != TLSEXT_SIGALG_ecdsa_secp256r1_sha256 | |
1526 | && sig != TLSEXT_SIGALG_ecdsa_secp384r1_sha384) { | |
f63a17d6 | 1527 | SSLfatal(s, SSL_AD_HANDSHAKE_FAILURE, |
f63a17d6 | 1528 | SSL_R_WRONG_SIGNATURE_TYPE); |
0f113f3e | 1529 | return 0; |
f1adb006 | 1530 | } |
8f88cb53 | 1531 | } |
0f113f3e | 1532 | } |
8f88cb53 | 1533 | } else if (tls1_suiteb(s)) { |
c48ffbcc | 1534 | SSLfatal(s, SSL_AD_HANDSHAKE_FAILURE, SSL_R_WRONG_SIGNATURE_TYPE); |
0f113f3e | 1535 | return 0; |
8f88cb53 | 1536 | } |
0f113f3e MC |
1537 | |
1538 | /* Check signature matches a type we sent */ | |
a9669ddc | 1539 | sent_sigslen = tls12_get_psigalgs(s, 1, &sent_sigs); |
536199ec | 1540 | for (i = 0; i < sent_sigslen; i++, sent_sigs++) { |
703bcee0 | 1541 | if (sig == *sent_sigs) |
0f113f3e MC |
1542 | break; |
1543 | } | |
1544 | /* Allow fallback to SHA1 if not strict mode */ | |
f742cda8 DSH |
1545 | if (i == sent_sigslen && (lu->hash != NID_sha1 |
1546 | || s->cert->cert_flags & SSL_CERT_FLAGS_CHECK_TLS_STRICT)) { | |
c48ffbcc | 1547 | SSLfatal(s, SSL_AD_HANDSHAKE_FAILURE, SSL_R_WRONG_SIGNATURE_TYPE); |
0f113f3e MC |
1548 | return 0; |
1549 | } | |
c8f6c28a | 1550 | if (!tls1_lookup_md(s->ctx, lu, &md)) { |
c48ffbcc | 1551 | SSLfatal(s, SSL_AD_HANDSHAKE_FAILURE, SSL_R_UNKNOWN_DIGEST); |
f63a17d6 | 1552 | return 0; |
0f113f3e | 1553 | } |
620c97b6 KR |
1554 | /* |
1555 | * Make sure security callback allows algorithm. For historical | |
1556 | * reasons we have to pass the sigalg as a two byte char array. | |
1557 | */ | |
1558 | sigalgstr[0] = (sig >> 8) & 0xff; | |
1559 | sigalgstr[1] = sig & 0xff; | |
1560 | secbits = sigalg_security_bits(s->ctx, lu); | |
1561 | if (secbits == 0 || | |
1562 | !ssl_security(s, SSL_SECOP_SIGALG_CHECK, secbits, | |
ed576acd | 1563 | md != NULL ? EVP_MD_get_type(md) : NID_undef, |
620c97b6 | 1564 | (void *)sigalgstr)) { |
c48ffbcc | 1565 | SSLfatal(s, SSL_AD_HANDSHAKE_FAILURE, SSL_R_WRONG_SIGNATURE_TYPE); |
620c97b6 | 1566 | return 0; |
0f113f3e | 1567 | } |
6cbebb55 | 1568 | /* Store the sigalg the peer uses */ |
555cbb32 | 1569 | s->s3.tmp.peer_sigalg = lu; |
0f113f3e MC |
1570 | return 1; |
1571 | } | |
2ea80354 | 1572 | |
42ef7aea DSH |
1573 | int SSL_get_peer_signature_type_nid(const SSL *s, int *pnid) |
1574 | { | |
555cbb32 | 1575 | if (s->s3.tmp.peer_sigalg == NULL) |
42ef7aea | 1576 | return 0; |
555cbb32 | 1577 | *pnid = s->s3.tmp.peer_sigalg->sig; |
42ef7aea DSH |
1578 | return 1; |
1579 | } | |
1580 | ||
a51c9f63 VD |
1581 | int SSL_get_signature_type_nid(const SSL *s, int *pnid) |
1582 | { | |
555cbb32 | 1583 | if (s->s3.tmp.sigalg == NULL) |
a51c9f63 | 1584 | return 0; |
555cbb32 | 1585 | *pnid = s->s3.tmp.sigalg->sig; |
a51c9f63 VD |
1586 | return 1; |
1587 | } | |
1588 | ||
0f113f3e | 1589 | /* |
3eb2aff4 KR |
1590 | * Set a mask of disabled algorithms: an algorithm is disabled if it isn't |
1591 | * supported, doesn't appear in supported signature algorithms, isn't supported | |
1592 | * by the enabled protocol versions or by the security level. | |
1593 | * | |
1594 | * This function should only be used for checking which ciphers are supported | |
1595 | * by the client. | |
1596 | * | |
1597 | * Call ssl_cipher_disabled() to check that it's enabled or not. | |
b7bfe69b | 1598 | */ |
1d0c08b4 | 1599 | int ssl_set_client_disabled(SSL *s) |
0f113f3e | 1600 | { |
555cbb32 TS |
1601 | s->s3.tmp.mask_a = 0; |
1602 | s->s3.tmp.mask_k = 0; | |
1603 | ssl_set_sig_mask(&s->s3.tmp.mask_a, s, SSL_SECOP_SIGALG_MASK); | |
1604 | if (ssl_get_min_max_version(s, &s->s3.tmp.min_ver, | |
1605 | &s->s3.tmp.max_ver, NULL) != 0) | |
1d0c08b4 | 1606 | return 0; |
a230b26e | 1607 | #ifndef OPENSSL_NO_PSK |
0f113f3e MC |
1608 | /* with PSK there must be client callback set */ |
1609 | if (!s->psk_client_callback) { | |
555cbb32 TS |
1610 | s->s3.tmp.mask_a |= SSL_aPSK; |
1611 | s->s3.tmp.mask_k |= SSL_PSK; | |
0f113f3e | 1612 | } |
a230b26e | 1613 | #endif /* OPENSSL_NO_PSK */ |
e481f9b9 | 1614 | #ifndef OPENSSL_NO_SRP |
0f113f3e | 1615 | if (!(s->srp_ctx.srp_Mask & SSL_kSRP)) { |
555cbb32 TS |
1616 | s->s3.tmp.mask_a |= SSL_aSRP; |
1617 | s->s3.tmp.mask_k |= SSL_kSRP; | |
0f113f3e | 1618 | } |
e481f9b9 | 1619 | #endif |
1d0c08b4 | 1620 | return 1; |
0f113f3e | 1621 | } |
fc101f88 | 1622 | |
3eb2aff4 KR |
1623 | /* |
1624 | * ssl_cipher_disabled - check that a cipher is disabled or not | |
1625 | * @s: SSL connection that you want to use the cipher on | |
1626 | * @c: cipher to check | |
1627 | * @op: Security check that you want to do | |
8af91fd9 | 1628 | * @ecdhe: If set to 1 then TLSv1 ECDHE ciphers are also allowed in SSLv3 |
3eb2aff4 KR |
1629 | * |
1630 | * Returns 1 when it's disabled, 0 when enabled. | |
1631 | */ | |
b0031e5d | 1632 | int ssl_cipher_disabled(const SSL *s, const SSL_CIPHER *c, int op, int ecdhe) |
0f113f3e | 1633 | { |
555cbb32 TS |
1634 | if (c->algorithm_mkey & s->s3.tmp.mask_k |
1635 | || c->algorithm_auth & s->s3.tmp.mask_a) | |
0f113f3e | 1636 | return 1; |
555cbb32 | 1637 | if (s->s3.tmp.max_ver == 0) |
3eb2aff4 | 1638 | return 1; |
8af91fd9 MC |
1639 | if (!SSL_IS_DTLS(s)) { |
1640 | int min_tls = c->min_tls; | |
1641 | ||
1642 | /* | |
1643 | * For historical reasons we will allow ECHDE to be selected by a server | |
1644 | * in SSLv3 if we are a client | |
1645 | */ | |
1646 | if (min_tls == TLS1_VERSION && ecdhe | |
1647 | && (c->algorithm_mkey & (SSL_kECDHE | SSL_kECDHEPSK)) != 0) | |
1648 | min_tls = SSL3_VERSION; | |
1649 | ||
555cbb32 | 1650 | if ((min_tls > s->s3.tmp.max_ver) || (c->max_tls < s->s3.tmp.min_ver)) |
8af91fd9 MC |
1651 | return 1; |
1652 | } | |
555cbb32 TS |
1653 | if (SSL_IS_DTLS(s) && (DTLS_VERSION_GT(c->min_dtls, s->s3.tmp.max_ver) |
1654 | || DTLS_VERSION_LT(c->max_dtls, s->s3.tmp.min_ver))) | |
3eb2aff4 KR |
1655 | return 1; |
1656 | ||
0f113f3e MC |
1657 | return !ssl_security(s, op, c->strength_bits, 0, (void *)c); |
1658 | } | |
b362ccab | 1659 | |
7da160b0 | 1660 | int tls_use_ticket(SSL *s) |
0f113f3e | 1661 | { |
08191294 | 1662 | if ((s->options & SSL_OP_NO_TICKET)) |
0f113f3e MC |
1663 | return 0; |
1664 | return ssl_security(s, SSL_SECOP_TICKET, 0, 0, NULL); | |
1665 | } | |
ed3883d2 | 1666 | |
e469af8d | 1667 | int tls1_set_server_sigalgs(SSL *s) |
0f113f3e | 1668 | { |
0f113f3e | 1669 | size_t i; |
8483a003 F |
1670 | |
1671 | /* Clear any shared signature algorithms */ | |
29948ac8 BK |
1672 | OPENSSL_free(s->shared_sigalgs); |
1673 | s->shared_sigalgs = NULL; | |
1674 | s->shared_sigalgslen = 0; | |
9195ddcd DSH |
1675 | /* Clear certificate validity flags */ |
1676 | for (i = 0; i < SSL_PKEY_NUM; i++) | |
555cbb32 | 1677 | s->s3.tmp.valid_flags[i] = 0; |
a8bb912d DSH |
1678 | /* |
1679 | * If peer sent no signature algorithms check to see if we support | |
1680 | * the default algorithm for each certificate type | |
1681 | */ | |
555cbb32 TS |
1682 | if (s->s3.tmp.peer_cert_sigalgs == NULL |
1683 | && s->s3.tmp.peer_sigalgs == NULL) { | |
a8bb912d DSH |
1684 | const uint16_t *sent_sigs; |
1685 | size_t sent_sigslen = tls12_get_psigalgs(s, 1, &sent_sigs); | |
0f113f3e | 1686 | |
a8bb912d DSH |
1687 | for (i = 0; i < SSL_PKEY_NUM; i++) { |
1688 | const SIGALG_LOOKUP *lu = tls1_get_legacy_sigalg(s, i); | |
1689 | size_t j; | |
1690 | ||
1691 | if (lu == NULL) | |
1692 | continue; | |
1693 | /* Check default matches a type we sent */ | |
1694 | for (j = 0; j < sent_sigslen; j++) { | |
1695 | if (lu->sigalg == sent_sigs[j]) { | |
555cbb32 | 1696 | s->s3.tmp.valid_flags[i] = CERT_PKEY_SIGN; |
a8bb912d DSH |
1697 | break; |
1698 | } | |
1699 | } | |
1700 | } | |
9195ddcd | 1701 | return 1; |
a8bb912d | 1702 | } |
9195ddcd DSH |
1703 | |
1704 | if (!tls1_process_sigalgs(s)) { | |
c48ffbcc | 1705 | SSLfatal(s, SSL_AD_INTERNAL_ERROR, ERR_R_INTERNAL_ERROR); |
f63a17d6 | 1706 | return 0; |
d376e57d | 1707 | } |
29948ac8 | 1708 | if (s->shared_sigalgs != NULL) |
9195ddcd | 1709 | return 1; |
f63a17d6 | 1710 | |
fb34a0f4 | 1711 | /* Fatal error if no shared signature algorithms */ |
c48ffbcc | 1712 | SSLfatal(s, SSL_AD_HANDSHAKE_FAILURE, |
f63a17d6 | 1713 | SSL_R_NO_SHARED_SIGNATURE_ALGORITHMS); |
0f113f3e MC |
1714 | return 0; |
1715 | } | |
e469af8d | 1716 | |
1d97c843 | 1717 | /*- |
1ab3836b | 1718 | * Gets the ticket information supplied by the client if any. |
e7f0d921 | 1719 | * |
1ab3836b | 1720 | * hello: The parsed ClientHello data |
c519e89f BM |
1721 | * ret: (output) on return, if a ticket was decrypted, then this is set to |
1722 | * point to the resulting session. | |
6434abbf | 1723 | */ |
61fb5923 | 1724 | SSL_TICKET_STATUS tls_get_ticket_from_client(SSL *s, CLIENTHELLO_MSG *hello, |
df0fed9a | 1725 | SSL_SESSION **ret) |
0f113f3e | 1726 | { |
1ab3836b MC |
1727 | size_t size; |
1728 | RAW_EXTENSION *ticketext; | |
e7f0d921 | 1729 | |
0f113f3e | 1730 | *ret = NULL; |
aff8c126 | 1731 | s->ext.ticket_expected = 0; |
0f113f3e MC |
1732 | |
1733 | /* | |
9362c93e MC |
1734 | * If tickets disabled or not supported by the protocol version |
1735 | * (e.g. TLSv1.3) behave as if no ticket present to permit stateful | |
0f113f3e MC |
1736 | * resumption. |
1737 | */ | |
1ab3836b | 1738 | if (s->version <= SSL3_VERSION || !tls_use_ticket(s)) |
df0fed9a | 1739 | return SSL_TICKET_NONE; |
9ceb2426 | 1740 | |
70af3d8e MC |
1741 | ticketext = &hello->pre_proc_exts[TLSEXT_IDX_session_ticket]; |
1742 | if (!ticketext->present) | |
df0fed9a | 1743 | return SSL_TICKET_NONE; |
1ab3836b MC |
1744 | |
1745 | size = PACKET_remaining(&ticketext->data); | |
70af3d8e | 1746 | |
c0638ade | 1747 | return tls_decrypt_ticket(s, PACKET_data(&ticketext->data), size, |
70af3d8e | 1748 | hello->session_id, hello->session_id_len, ret); |
1ab3836b MC |
1749 | } |
1750 | ||
1d97c843 TH |
1751 | /*- |
1752 | * tls_decrypt_ticket attempts to decrypt a session ticket. | |
c519e89f | 1753 | * |
61fb5923 MC |
1754 | * If s->tls_session_secret_cb is set and we're not doing TLSv1.3 then we are |
1755 | * expecting a pre-shared key ciphersuite, in which case we have no use for | |
1756 | * session tickets and one will never be decrypted, nor will | |
1757 | * s->ext.ticket_expected be set to 1. | |
1758 | * | |
1759 | * Side effects: | |
1760 | * Sets s->ext.ticket_expected to 1 if the server will have to issue | |
1761 | * a new session ticket to the client because the client indicated support | |
1762 | * (and s->tls_session_secret_cb is NULL) but the client either doesn't have | |
1763 | * a session ticket or we couldn't use the one it gave us, or if | |
1764 | * s->ctx->ext.ticket_key_cb asked to renew the client's ticket. | |
1765 | * Otherwise, s->ext.ticket_expected is set to 0. | |
1766 | * | |
c519e89f | 1767 | * etick: points to the body of the session ticket extension. |
8483a003 | 1768 | * eticklen: the length of the session tickets extension. |
c519e89f BM |
1769 | * sess_id: points at the session ID. |
1770 | * sesslen: the length of the session ID. | |
1771 | * psess: (output) on return, if a ticket was decrypted, then this is set to | |
1772 | * point to the resulting session. | |
c519e89f | 1773 | */ |
61fb5923 | 1774 | SSL_TICKET_STATUS tls_decrypt_ticket(SSL *s, const unsigned char *etick, |
df0fed9a TS |
1775 | size_t eticklen, const unsigned char *sess_id, |
1776 | size_t sesslen, SSL_SESSION **psess) | |
0f113f3e | 1777 | { |
61fb5923 | 1778 | SSL_SESSION *sess = NULL; |
0f113f3e MC |
1779 | unsigned char *sdec; |
1780 | const unsigned char *p; | |
ddf6ec00 | 1781 | int slen, renew_ticket = 0, declen; |
61fb5923 | 1782 | SSL_TICKET_STATUS ret = SSL_TICKET_FATAL_ERR_OTHER; |
348240c6 | 1783 | size_t mlen; |
0f113f3e | 1784 | unsigned char tick_hmac[EVP_MAX_MD_SIZE]; |
a76ce286 | 1785 | SSL_HMAC *hctx = NULL; |
ee763495 | 1786 | EVP_CIPHER_CTX *ctx = NULL; |
222da979 | 1787 | SSL_CTX *tctx = s->session_ctx; |
e97763c9 | 1788 | |
61fb5923 MC |
1789 | if (eticklen == 0) { |
1790 | /* | |
1791 | * The client will accept a ticket but doesn't currently have | |
1792 | * one (TLSv1.2 and below), or treated as a fatal error in TLSv1.3 | |
1793 | */ | |
1794 | ret = SSL_TICKET_EMPTY; | |
1795 | goto end; | |
1796 | } | |
1797 | if (!SSL_IS_TLS13(s) && s->ext.session_secret_cb) { | |
1798 | /* | |
1799 | * Indicate that the ticket couldn't be decrypted rather than | |
1800 | * generating the session from ticket now, trigger | |
1801 | * abbreviated handshake based on external mechanism to | |
1802 | * calculate the master secret later. | |
1803 | */ | |
1804 | ret = SSL_TICKET_NO_DECRYPT; | |
1805 | goto end; | |
1806 | } | |
1807 | ||
ee763495 MC |
1808 | /* Need at least keyname + iv */ |
1809 | if (eticklen < TLSEXT_KEYNAME_LENGTH + EVP_MAX_IV_LENGTH) { | |
df0fed9a | 1810 | ret = SSL_TICKET_NO_DECRYPT; |
c0638ade | 1811 | goto end; |
ee763495 MC |
1812 | } |
1813 | ||
0f113f3e | 1814 | /* Initialize session ticket encryption and HMAC contexts */ |
a76ce286 | 1815 | hctx = ssl_hmac_new(tctx); |
c0638ade MC |
1816 | if (hctx == NULL) { |
1817 | ret = SSL_TICKET_FATAL_ERR_MALLOC; | |
1818 | goto end; | |
1819 | } | |
846ec07d | 1820 | ctx = EVP_CIPHER_CTX_new(); |
35b1a433 | 1821 | if (ctx == NULL) { |
df0fed9a | 1822 | ret = SSL_TICKET_FATAL_ERR_MALLOC; |
c0638ade | 1823 | goto end; |
35b1a433 | 1824 | } |
a76ce286 P |
1825 | #ifndef OPENSSL_NO_DEPRECATED_3_0 |
1826 | if (tctx->ext.ticket_key_evp_cb != NULL || tctx->ext.ticket_key_cb != NULL) | |
1827 | #else | |
1828 | if (tctx->ext.ticket_key_evp_cb != NULL) | |
1829 | #endif | |
1830 | { | |
0f113f3e | 1831 | unsigned char *nctick = (unsigned char *)etick; |
a76ce286 P |
1832 | int rv = 0; |
1833 | ||
1834 | if (tctx->ext.ticket_key_evp_cb != NULL) | |
1835 | rv = tctx->ext.ticket_key_evp_cb(s, nctick, | |
1836 | nctick + TLSEXT_KEYNAME_LENGTH, | |
1837 | ctx, | |
1838 | ssl_hmac_get0_EVP_MAC_CTX(hctx), | |
1839 | 0); | |
1840 | #ifndef OPENSSL_NO_DEPRECATED_3_0 | |
1841 | else if (tctx->ext.ticket_key_cb != NULL) | |
1842 | /* if 0 is returned, write an empty ticket */ | |
1843 | rv = tctx->ext.ticket_key_cb(s, nctick, | |
ee763495 | 1844 | nctick + TLSEXT_KEYNAME_LENGTH, |
a76ce286 P |
1845 | ctx, ssl_hmac_get0_HMAC_CTX(hctx), 0); |
1846 | #endif | |
c0638ade MC |
1847 | if (rv < 0) { |
1848 | ret = SSL_TICKET_FATAL_ERR_OTHER; | |
1849 | goto end; | |
1850 | } | |
35b1a433 | 1851 | if (rv == 0) { |
df0fed9a | 1852 | ret = SSL_TICKET_NO_DECRYPT; |
c0638ade | 1853 | goto end; |
35b1a433 | 1854 | } |
0f113f3e MC |
1855 | if (rv == 2) |
1856 | renew_ticket = 1; | |
1857 | } else { | |
148bfd26 MC |
1858 | EVP_CIPHER *aes256cbc = NULL; |
1859 | ||
0f113f3e | 1860 | /* Check key name matches */ |
aff8c126 | 1861 | if (memcmp(etick, tctx->ext.tick_key_name, |
ee763495 | 1862 | TLSEXT_KEYNAME_LENGTH) != 0) { |
df0fed9a | 1863 | ret = SSL_TICKET_NO_DECRYPT; |
c0638ade | 1864 | goto end; |
35b1a433 | 1865 | } |
148bfd26 MC |
1866 | |
1867 | aes256cbc = EVP_CIPHER_fetch(s->ctx->libctx, "AES-256-CBC", | |
1868 | s->ctx->propq); | |
1869 | if (aes256cbc == NULL | |
1870 | || ssl_hmac_init(hctx, tctx->ext.secure->tick_hmac_key, | |
1871 | sizeof(tctx->ext.secure->tick_hmac_key), | |
1872 | "SHA256") <= 0 | |
1873 | || EVP_DecryptInit_ex(ctx, aes256cbc, NULL, | |
4bfb96f2 | 1874 | tctx->ext.secure->tick_aes_key, |
ee763495 | 1875 | etick + TLSEXT_KEYNAME_LENGTH) <= 0) { |
148bfd26 | 1876 | EVP_CIPHER_free(aes256cbc); |
c0638ade MC |
1877 | ret = SSL_TICKET_FATAL_ERR_OTHER; |
1878 | goto end; | |
a230b26e | 1879 | } |
148bfd26 | 1880 | EVP_CIPHER_free(aes256cbc); |
c0638ade MC |
1881 | if (SSL_IS_TLS13(s)) |
1882 | renew_ticket = 1; | |
0f113f3e MC |
1883 | } |
1884 | /* | |
1885 | * Attempt to process session ticket, first conduct sanity and integrity | |
1886 | * checks on ticket. | |
1887 | */ | |
a76ce286 | 1888 | mlen = ssl_hmac_size(hctx); |
348240c6 | 1889 | if (mlen == 0) { |
c0638ade MC |
1890 | ret = SSL_TICKET_FATAL_ERR_OTHER; |
1891 | goto end; | |
0f113f3e | 1892 | } |
c0638ade | 1893 | |
e97763c9 DSH |
1894 | /* Sanity check ticket length: must exceed keyname + IV + HMAC */ |
1895 | if (eticklen <= | |
ed576acd | 1896 | TLSEXT_KEYNAME_LENGTH + EVP_CIPHER_CTX_get_iv_length(ctx) + mlen) { |
df0fed9a | 1897 | ret = SSL_TICKET_NO_DECRYPT; |
c0638ade | 1898 | goto end; |
e97763c9 | 1899 | } |
0f113f3e MC |
1900 | eticklen -= mlen; |
1901 | /* Check HMAC of encrypted ticket */ | |
a76ce286 P |
1902 | if (ssl_hmac_update(hctx, etick, eticklen) <= 0 |
1903 | || ssl_hmac_final(hctx, tick_hmac, NULL, sizeof(tick_hmac)) <= 0) { | |
c0638ade MC |
1904 | ret = SSL_TICKET_FATAL_ERR_OTHER; |
1905 | goto end; | |
5f3d93e4 | 1906 | } |
c0638ade | 1907 | |
0f113f3e | 1908 | if (CRYPTO_memcmp(tick_hmac, etick + eticklen, mlen)) { |
c0638ade MC |
1909 | ret = SSL_TICKET_NO_DECRYPT; |
1910 | goto end; | |
0f113f3e MC |
1911 | } |
1912 | /* Attempt to decrypt session data */ | |
1913 | /* Move p after IV to start of encrypted ticket, update length */ | |
ed576acd TM |
1914 | p = etick + TLSEXT_KEYNAME_LENGTH + EVP_CIPHER_CTX_get_iv_length(ctx); |
1915 | eticklen -= TLSEXT_KEYNAME_LENGTH + EVP_CIPHER_CTX_get_iv_length(ctx); | |
0f113f3e | 1916 | sdec = OPENSSL_malloc(eticklen); |
348240c6 MC |
1917 | if (sdec == NULL || EVP_DecryptUpdate(ctx, sdec, &slen, p, |
1918 | (int)eticklen) <= 0) { | |
d1247df2 | 1919 | OPENSSL_free(sdec); |
c0638ade MC |
1920 | ret = SSL_TICKET_FATAL_ERR_OTHER; |
1921 | goto end; | |
0f113f3e | 1922 | } |
348240c6 | 1923 | if (EVP_DecryptFinal(ctx, sdec + slen, &declen) <= 0) { |
0f113f3e | 1924 | OPENSSL_free(sdec); |
c0638ade MC |
1925 | ret = SSL_TICKET_NO_DECRYPT; |
1926 | goto end; | |
0f113f3e | 1927 | } |
348240c6 | 1928 | slen += declen; |
0f113f3e MC |
1929 | p = sdec; |
1930 | ||
1931 | sess = d2i_SSL_SESSION(NULL, &p, slen); | |
d3bc9805 | 1932 | slen -= p - sdec; |
0f113f3e MC |
1933 | OPENSSL_free(sdec); |
1934 | if (sess) { | |
79020b27 | 1935 | /* Some additional consistency checks */ |
32305f88 | 1936 | if (slen != 0) { |
79020b27 | 1937 | SSL_SESSION_free(sess); |
5f96a95e | 1938 | sess = NULL; |
c0638ade MC |
1939 | ret = SSL_TICKET_NO_DECRYPT; |
1940 | goto end; | |
79020b27 | 1941 | } |
0f113f3e MC |
1942 | /* |
1943 | * The session ID, if non-empty, is used by some clients to detect | |
1944 | * that the ticket has been accepted. So we copy it to the session | |
1945 | * structure. If it is empty set length to zero as required by | |
1946 | * standard. | |
1947 | */ | |
32305f88 | 1948 | if (sesslen) { |
0f113f3e | 1949 | memcpy(sess->session_id, sess_id, sesslen); |
32305f88 MC |
1950 | sess->session_id_length = sesslen; |
1951 | } | |
0f113f3e | 1952 | if (renew_ticket) |
c0638ade | 1953 | ret = SSL_TICKET_SUCCESS_RENEW; |
0f113f3e | 1954 | else |
c0638ade MC |
1955 | ret = SSL_TICKET_SUCCESS; |
1956 | goto end; | |
0f113f3e MC |
1957 | } |
1958 | ERR_clear_error(); | |
1959 | /* | |
1960 | * For session parse failure, indicate that we need to send a new ticket. | |
1961 | */ | |
c0638ade MC |
1962 | ret = SSL_TICKET_NO_DECRYPT; |
1963 | ||
1964 | end: | |
846ec07d | 1965 | EVP_CIPHER_CTX_free(ctx); |
a76ce286 | 1966 | ssl_hmac_free(hctx); |
c0638ade MC |
1967 | |
1968 | /* | |
61fb5923 MC |
1969 | * If set, the decrypt_ticket_cb() is called unless a fatal error was |
1970 | * detected above. The callback is responsible for checking |ret| before it | |
1971 | * performs any action | |
c0638ade | 1972 | */ |
61fb5923 MC |
1973 | if (s->session_ctx->decrypt_ticket_cb != NULL |
1974 | && (ret == SSL_TICKET_EMPTY | |
1975 | || ret == SSL_TICKET_NO_DECRYPT | |
1976 | || ret == SSL_TICKET_SUCCESS | |
1977 | || ret == SSL_TICKET_SUCCESS_RENEW)) { | |
c0638ade | 1978 | size_t keyname_len = eticklen; |
61fb5923 | 1979 | int retcb; |
c0638ade MC |
1980 | |
1981 | if (keyname_len > TLSEXT_KEYNAME_LENGTH) | |
1982 | keyname_len = TLSEXT_KEYNAME_LENGTH; | |
61fb5923 MC |
1983 | retcb = s->session_ctx->decrypt_ticket_cb(s, sess, etick, keyname_len, |
1984 | ret, | |
1985 | s->session_ctx->ticket_cb_data); | |
1986 | switch (retcb) { | |
1987 | case SSL_TICKET_RETURN_ABORT: | |
1988 | ret = SSL_TICKET_FATAL_ERR_OTHER; | |
1989 | break; | |
1990 | ||
1991 | case SSL_TICKET_RETURN_IGNORE: | |
1992 | ret = SSL_TICKET_NONE; | |
1993 | SSL_SESSION_free(sess); | |
1994 | sess = NULL; | |
1995 | break; | |
1996 | ||
1997 | case SSL_TICKET_RETURN_IGNORE_RENEW: | |
1998 | if (ret != SSL_TICKET_EMPTY && ret != SSL_TICKET_NO_DECRYPT) | |
1999 | ret = SSL_TICKET_NO_DECRYPT; | |
2000 | /* else the value of |ret| will already do the right thing */ | |
2001 | SSL_SESSION_free(sess); | |
2002 | sess = NULL; | |
2003 | break; | |
2004 | ||
2005 | case SSL_TICKET_RETURN_USE: | |
2006 | case SSL_TICKET_RETURN_USE_RENEW: | |
2007 | if (ret != SSL_TICKET_SUCCESS | |
2008 | && ret != SSL_TICKET_SUCCESS_RENEW) | |
2009 | ret = SSL_TICKET_FATAL_ERR_OTHER; | |
2010 | else if (retcb == SSL_TICKET_RETURN_USE) | |
2011 | ret = SSL_TICKET_SUCCESS; | |
2012 | else | |
2013 | ret = SSL_TICKET_SUCCESS_RENEW; | |
2014 | break; | |
2015 | ||
2016 | default: | |
2017 | ret = SSL_TICKET_FATAL_ERR_OTHER; | |
2018 | } | |
c0638ade MC |
2019 | } |
2020 | ||
309371d6 MC |
2021 | if (s->ext.session_secret_cb == NULL || SSL_IS_TLS13(s)) { |
2022 | switch (ret) { | |
2023 | case SSL_TICKET_NO_DECRYPT: | |
2024 | case SSL_TICKET_SUCCESS_RENEW: | |
2025 | case SSL_TICKET_EMPTY: | |
2026 | s->ext.ticket_expected = 1; | |
2027 | } | |
c0638ade MC |
2028 | } |
2029 | ||
61fb5923 MC |
2030 | *psess = sess; |
2031 | ||
2032 | return ret; | |
0f113f3e | 2033 | } |
6434abbf | 2034 | |
b362ccab | 2035 | /* Check to see if a signature algorithm is allowed */ |
b0031e5d | 2036 | static int tls12_sigalg_allowed(const SSL *s, int op, const SIGALG_LOOKUP *lu) |
0f113f3e | 2037 | { |
703bcee0 | 2038 | unsigned char sigalgstr[2]; |
44b6318f | 2039 | int secbits; |
703bcee0 | 2040 | |
263ff2c9 | 2041 | if (lu == NULL || !lu->enabled) |
0f113f3e | 2042 | return 0; |
224b4e37 DSH |
2043 | /* DSA is not allowed in TLS 1.3 */ |
2044 | if (SSL_IS_TLS13(s) && lu->sig == EVP_PKEY_DSA) | |
2045 | return 0; | |
08cea586 MC |
2046 | /* |
2047 | * At some point we should fully axe DSA/etc. in ClientHello as per TLS 1.3 | |
2048 | * spec | |
2049 | */ | |
555cbb32 | 2050 | if (!s->server && !SSL_IS_DTLS(s) && s->s3.tmp.min_ver >= TLS1_3_VERSION |
6ffeb269 BK |
2051 | && (lu->sig == EVP_PKEY_DSA || lu->hash_idx == SSL_MD_SHA1_IDX |
2052 | || lu->hash_idx == SSL_MD_MD5_IDX | |
2053 | || lu->hash_idx == SSL_MD_SHA224_IDX)) | |
2054 | return 0; | |
871980a9 | 2055 | |
0f113f3e | 2056 | /* See if public key algorithm allowed */ |
a68eee67 | 2057 | if (ssl_cert_is_disabled(s->ctx, lu->sig_idx)) |
0f113f3e | 2058 | return 0; |
871980a9 MC |
2059 | |
2060 | if (lu->sig == NID_id_GostR3410_2012_256 | |
2061 | || lu->sig == NID_id_GostR3410_2012_512 | |
2062 | || lu->sig == NID_id_GostR3410_2001) { | |
2063 | /* We never allow GOST sig algs on the server with TLSv1.3 */ | |
2064 | if (s->server && SSL_IS_TLS13(s)) | |
2065 | return 0; | |
2066 | if (!s->server | |
2067 | && s->method->version == TLS_ANY_VERSION | |
555cbb32 | 2068 | && s->s3.tmp.max_ver >= TLS1_3_VERSION) { |
871980a9 MC |
2069 | int i, num; |
2070 | STACK_OF(SSL_CIPHER) *sk; | |
2071 | ||
2072 | /* | |
2073 | * We're a client that could negotiate TLSv1.3. We only allow GOST | |
2074 | * sig algs if we could negotiate TLSv1.2 or below and we have GOST | |
2075 | * ciphersuites enabled. | |
2076 | */ | |
2077 | ||
555cbb32 | 2078 | if (s->s3.tmp.min_ver >= TLS1_3_VERSION) |
871980a9 MC |
2079 | return 0; |
2080 | ||
2081 | sk = SSL_get_ciphers(s); | |
2082 | num = sk != NULL ? sk_SSL_CIPHER_num(sk) : 0; | |
2083 | for (i = 0; i < num; i++) { | |
2084 | const SSL_CIPHER *c; | |
2085 | ||
2086 | c = sk_SSL_CIPHER_value(sk, i); | |
2087 | /* Skip disabled ciphers */ | |
2088 | if (ssl_cipher_disabled(s, c, SSL_SECOP_CIPHER_SUPPORTED, 0)) | |
2089 | continue; | |
2090 | ||
5a5530a2 | 2091 | if ((c->algorithm_mkey & (SSL_kGOST | SSL_kGOST18)) != 0) |
871980a9 MC |
2092 | break; |
2093 | } | |
2094 | if (i == num) | |
2095 | return 0; | |
2096 | } | |
2097 | } | |
2098 | ||
0f113f3e | 2099 | /* Finally see if security callback allows it */ |
620c97b6 | 2100 | secbits = sigalg_security_bits(s->ctx, lu); |
b0e9ab95 DSH |
2101 | sigalgstr[0] = (lu->sigalg >> 8) & 0xff; |
2102 | sigalgstr[1] = lu->sigalg & 0xff; | |
44b6318f | 2103 | return ssl_security(s, op, secbits, lu->hash, (void *)sigalgstr); |
0f113f3e MC |
2104 | } |
2105 | ||
2106 | /* | |
2107 | * Get a mask of disabled public key algorithms based on supported signature | |
2108 | * algorithms. For example if no signature algorithm supports RSA then RSA is | |
2109 | * disabled. | |
b362ccab DSH |
2110 | */ |
2111 | ||
90d9e49a | 2112 | void ssl_set_sig_mask(uint32_t *pmask_a, SSL *s, int op) |
0f113f3e | 2113 | { |
98c792d1 | 2114 | const uint16_t *sigalgs; |
0f113f3e | 2115 | size_t i, sigalgslen; |
13cc2574 | 2116 | uint32_t disabled_mask = SSL_aRSA | SSL_aDSS | SSL_aECDSA; |
0f113f3e | 2117 | /* |
13cc2574 DSH |
2118 | * Go through all signature algorithms seeing if we support any |
2119 | * in disabled_mask. | |
0f113f3e | 2120 | */ |
a9669ddc | 2121 | sigalgslen = tls12_get_psigalgs(s, 1, &sigalgs); |
b2555168 | 2122 | for (i = 0; i < sigalgslen; i++, sigalgs++) { |
263ff2c9 | 2123 | const SIGALG_LOOKUP *lu = tls1_lookup_sigalg(s, *sigalgs); |
13cc2574 | 2124 | const SSL_CERT_LOOKUP *clu; |
b0e9ab95 DSH |
2125 | |
2126 | if (lu == NULL) | |
2127 | continue; | |
13cc2574 DSH |
2128 | |
2129 | clu = ssl_cert_lookup_by_idx(lu->sig_idx); | |
dd6b2706 P |
2130 | if (clu == NULL) |
2131 | continue; | |
13cc2574 DSH |
2132 | |
2133 | /* If algorithm is disabled see if we can enable it */ | |
2134 | if ((clu->amask & disabled_mask) != 0 | |
2135 | && tls12_sigalg_allowed(s, op, lu)) | |
2136 | disabled_mask &= ~clu->amask; | |
0f113f3e | 2137 | } |
13cc2574 | 2138 | *pmask_a |= disabled_mask; |
0f113f3e | 2139 | } |
b362ccab | 2140 | |
ae2f7b37 | 2141 | int tls12_copy_sigalgs(SSL *s, WPACKET *pkt, |
98c792d1 | 2142 | const uint16_t *psig, size_t psiglen) |
2c7b4dbc MC |
2143 | { |
2144 | size_t i; | |
b0e9ab95 | 2145 | int rv = 0; |
c0f9e23c | 2146 | |
703bcee0 | 2147 | for (i = 0; i < psiglen; i++, psig++) { |
263ff2c9 | 2148 | const SIGALG_LOOKUP *lu = tls1_lookup_sigalg(s, *psig); |
b0e9ab95 | 2149 | |
54e3efff MC |
2150 | if (lu == NULL |
2151 | || !tls12_sigalg_allowed(s, SSL_SECOP_SIGALG_SUPPORTED, lu)) | |
b0e9ab95 DSH |
2152 | continue; |
2153 | if (!WPACKET_put_bytes_u16(pkt, *psig)) | |
2154 | return 0; | |
2155 | /* | |
2156 | * If TLS 1.3 must have at least one valid TLS 1.3 message | |
d8311fc9 | 2157 | * signing algorithm: i.e. neither RSA nor SHA1/SHA224 |
b0e9ab95 DSH |
2158 | */ |
2159 | if (rv == 0 && (!SSL_IS_TLS13(s) | |
d8311fc9 MC |
2160 | || (lu->sig != EVP_PKEY_RSA |
2161 | && lu->hash != NID_sha1 | |
2162 | && lu->hash != NID_sha224))) | |
b0e9ab95 | 2163 | rv = 1; |
2c7b4dbc | 2164 | } |
5528d68f | 2165 | if (rv == 0) |
6849b73c | 2166 | ERR_raise(ERR_LIB_SSL, SSL_R_NO_SUITABLE_SIGNATURE_ALGORITHM); |
b0e9ab95 | 2167 | return rv; |
2c7b4dbc MC |
2168 | } |
2169 | ||
4453cd8c | 2170 | /* Given preference and allowed sigalgs set shared sigalgs */ |
4d43ee28 | 2171 | static size_t tls12_shared_sigalgs(SSL *s, const SIGALG_LOOKUP **shsig, |
98c792d1 DSH |
2172 | const uint16_t *pref, size_t preflen, |
2173 | const uint16_t *allow, size_t allowlen) | |
0f113f3e | 2174 | { |
98c792d1 | 2175 | const uint16_t *ptmp, *atmp; |
0f113f3e | 2176 | size_t i, j, nmatch = 0; |
703bcee0 | 2177 | for (i = 0, ptmp = pref; i < preflen; i++, ptmp++) { |
263ff2c9 | 2178 | const SIGALG_LOOKUP *lu = tls1_lookup_sigalg(s, *ptmp); |
b0e9ab95 | 2179 | |
0f113f3e | 2180 | /* Skip disabled hashes or signature algorithms */ |
54e3efff MC |
2181 | if (lu == NULL |
2182 | || !tls12_sigalg_allowed(s, SSL_SECOP_SIGALG_SHARED, lu)) | |
0f113f3e | 2183 | continue; |
703bcee0 MC |
2184 | for (j = 0, atmp = allow; j < allowlen; j++, atmp++) { |
2185 | if (*ptmp == *atmp) { | |
0f113f3e | 2186 | nmatch++; |
b0e9ab95 DSH |
2187 | if (shsig) |
2188 | *shsig++ = lu; | |
0f113f3e MC |
2189 | break; |
2190 | } | |
2191 | } | |
2192 | } | |
2193 | return nmatch; | |
2194 | } | |
4453cd8c DSH |
2195 | |
2196 | /* Set shared signature algorithms for SSL structures */ | |
2197 | static int tls1_set_shared_sigalgs(SSL *s) | |
0f113f3e | 2198 | { |
98c792d1 | 2199 | const uint16_t *pref, *allow, *conf; |
0f113f3e MC |
2200 | size_t preflen, allowlen, conflen; |
2201 | size_t nmatch; | |
4d43ee28 | 2202 | const SIGALG_LOOKUP **salgs = NULL; |
0f113f3e MC |
2203 | CERT *c = s->cert; |
2204 | unsigned int is_suiteb = tls1_suiteb(s); | |
b548a1f1 | 2205 | |
29948ac8 BK |
2206 | OPENSSL_free(s->shared_sigalgs); |
2207 | s->shared_sigalgs = NULL; | |
2208 | s->shared_sigalgslen = 0; | |
0f113f3e MC |
2209 | /* If client use client signature algorithms if not NULL */ |
2210 | if (!s->server && c->client_sigalgs && !is_suiteb) { | |
2211 | conf = c->client_sigalgs; | |
2212 | conflen = c->client_sigalgslen; | |
2213 | } else if (c->conf_sigalgs && !is_suiteb) { | |
2214 | conf = c->conf_sigalgs; | |
2215 | conflen = c->conf_sigalgslen; | |
2216 | } else | |
a9669ddc | 2217 | conflen = tls12_get_psigalgs(s, 0, &conf); |
0f113f3e MC |
2218 | if (s->options & SSL_OP_CIPHER_SERVER_PREFERENCE || is_suiteb) { |
2219 | pref = conf; | |
2220 | preflen = conflen; | |
555cbb32 TS |
2221 | allow = s->s3.tmp.peer_sigalgs; |
2222 | allowlen = s->s3.tmp.peer_sigalgslen; | |
0f113f3e MC |
2223 | } else { |
2224 | allow = conf; | |
2225 | allowlen = conflen; | |
555cbb32 TS |
2226 | pref = s->s3.tmp.peer_sigalgs; |
2227 | preflen = s->s3.tmp.peer_sigalgslen; | |
0f113f3e MC |
2228 | } |
2229 | nmatch = tls12_shared_sigalgs(s, NULL, pref, preflen, allow, allowlen); | |
34e3edbf | 2230 | if (nmatch) { |
cdb10bae | 2231 | if ((salgs = OPENSSL_malloc(nmatch * sizeof(*salgs))) == NULL) { |
6849b73c | 2232 | ERR_raise(ERR_LIB_SSL, ERR_R_MALLOC_FAILURE); |
34e3edbf | 2233 | return 0; |
cdb10bae | 2234 | } |
34e3edbf DSH |
2235 | nmatch = tls12_shared_sigalgs(s, salgs, pref, preflen, allow, allowlen); |
2236 | } else { | |
2237 | salgs = NULL; | |
2238 | } | |
29948ac8 BK |
2239 | s->shared_sigalgs = salgs; |
2240 | s->shared_sigalgslen = nmatch; | |
0f113f3e MC |
2241 | return 1; |
2242 | } | |
4453cd8c | 2243 | |
9e84a42d | 2244 | int tls1_save_u16(PACKET *pkt, uint16_t **pdest, size_t *pdestlen) |
0f113f3e | 2245 | { |
98c792d1 | 2246 | unsigned int stmp; |
703bcee0 | 2247 | size_t size, i; |
9e84a42d | 2248 | uint16_t *buf; |
0f113f3e | 2249 | |
703bcee0 MC |
2250 | size = PACKET_remaining(pkt); |
2251 | ||
2252 | /* Invalid data length */ | |
8f12296e | 2253 | if (size == 0 || (size & 1) != 0) |
703bcee0 MC |
2254 | return 0; |
2255 | ||
2256 | size >>= 1; | |
2257 | ||
cdb10bae | 2258 | if ((buf = OPENSSL_malloc(size * sizeof(*buf))) == NULL) { |
6849b73c | 2259 | ERR_raise(ERR_LIB_SSL, ERR_R_MALLOC_FAILURE); |
0f113f3e | 2260 | return 0; |
cdb10bae | 2261 | } |
98c792d1 | 2262 | for (i = 0; i < size && PACKET_get_net_2(pkt, &stmp); i++) |
9e84a42d | 2263 | buf[i] = stmp; |
703bcee0 | 2264 | |
9e84a42d DSH |
2265 | if (i != size) { |
2266 | OPENSSL_free(buf); | |
703bcee0 | 2267 | return 0; |
9e84a42d DSH |
2268 | } |
2269 | ||
2270 | OPENSSL_free(*pdest); | |
2271 | *pdest = buf; | |
2272 | *pdestlen = size; | |
703bcee0 | 2273 | |
0f113f3e MC |
2274 | return 1; |
2275 | } | |
6b7be581 | 2276 | |
c589c34e | 2277 | int tls1_save_sigalgs(SSL *s, PACKET *pkt, int cert) |
9e84a42d DSH |
2278 | { |
2279 | /* Extension ignored for inappropriate versions */ | |
2280 | if (!SSL_USE_SIGALGS(s)) | |
2281 | return 1; | |
2282 | /* Should never happen */ | |
2283 | if (s->cert == NULL) | |
2284 | return 0; | |
2285 | ||
c589c34e | 2286 | if (cert) |
555cbb32 TS |
2287 | return tls1_save_u16(pkt, &s->s3.tmp.peer_cert_sigalgs, |
2288 | &s->s3.tmp.peer_cert_sigalgslen); | |
c589c34e | 2289 | else |
555cbb32 TS |
2290 | return tls1_save_u16(pkt, &s->s3.tmp.peer_sigalgs, |
2291 | &s->s3.tmp.peer_sigalgslen); | |
9e84a42d | 2292 | |
9e84a42d DSH |
2293 | } |
2294 | ||
2295 | /* Set preferred digest for each key type */ | |
2296 | ||
c800c27a | 2297 | int tls1_process_sigalgs(SSL *s) |
0f113f3e | 2298 | { |
0f113f3e | 2299 | size_t i; |
555cbb32 | 2300 | uint32_t *pvalid = s->s3.tmp.valid_flags; |
4d43ee28 | 2301 | |
0f113f3e MC |
2302 | if (!tls1_set_shared_sigalgs(s)) |
2303 | return 0; | |
2304 | ||
9195ddcd DSH |
2305 | for (i = 0; i < SSL_PKEY_NUM; i++) |
2306 | pvalid[i] = 0; | |
2307 | ||
29948ac8 BK |
2308 | for (i = 0; i < s->shared_sigalgslen; i++) { |
2309 | const SIGALG_LOOKUP *sigptr = s->shared_sigalgs[i]; | |
9195ddcd | 2310 | int idx = sigptr->sig_idx; |
4d43ee28 | 2311 | |
523fb323 | 2312 | /* Ignore PKCS1 based sig algs in TLSv1.3 */ |
4d43ee28 | 2313 | if (SSL_IS_TLS13(s) && sigptr->sig == EVP_PKEY_RSA) |
523fb323 | 2314 | continue; |
9195ddcd | 2315 | /* If not disabled indicate we can explicitly sign */ |
a68eee67 | 2316 | if (pvalid[idx] == 0 && !ssl_cert_is_disabled(s->ctx, idx)) |
b8858aec | 2317 | pvalid[idx] = CERT_PKEY_EXPLICIT_SIGN | CERT_PKEY_SIGN; |
0f113f3e MC |
2318 | } |
2319 | return 1; | |
2320 | } | |
4817504d | 2321 | |
e7f8ff43 | 2322 | int SSL_get_sigalgs(SSL *s, int idx, |
0f113f3e MC |
2323 | int *psign, int *phash, int *psignhash, |
2324 | unsigned char *rsig, unsigned char *rhash) | |
2325 | { | |
555cbb32 TS |
2326 | uint16_t *psig = s->s3.tmp.peer_sigalgs; |
2327 | size_t numsigalgs = s->s3.tmp.peer_sigalgslen; | |
348240c6 | 2328 | if (psig == NULL || numsigalgs > INT_MAX) |
0f113f3e MC |
2329 | return 0; |
2330 | if (idx >= 0) { | |
4d43ee28 DSH |
2331 | const SIGALG_LOOKUP *lu; |
2332 | ||
703bcee0 | 2333 | if (idx >= (int)numsigalgs) |
0f113f3e MC |
2334 | return 0; |
2335 | psig += idx; | |
4d43ee28 | 2336 | if (rhash != NULL) |
536199ec | 2337 | *rhash = (unsigned char)((*psig >> 8) & 0xff); |
4d43ee28 | 2338 | if (rsig != NULL) |
536199ec | 2339 | *rsig = (unsigned char)(*psig & 0xff); |
263ff2c9 | 2340 | lu = tls1_lookup_sigalg(s, *psig); |
4d43ee28 DSH |
2341 | if (psign != NULL) |
2342 | *psign = lu != NULL ? lu->sig : NID_undef; | |
2343 | if (phash != NULL) | |
2344 | *phash = lu != NULL ? lu->hash : NID_undef; | |
2345 | if (psignhash != NULL) | |
2346 | *psignhash = lu != NULL ? lu->sigandhash : NID_undef; | |
0f113f3e | 2347 | } |
348240c6 | 2348 | return (int)numsigalgs; |
0f113f3e | 2349 | } |
4453cd8c DSH |
2350 | |
2351 | int SSL_get_shared_sigalgs(SSL *s, int idx, | |
0f113f3e MC |
2352 | int *psign, int *phash, int *psignhash, |
2353 | unsigned char *rsig, unsigned char *rhash) | |
2354 | { | |
4d43ee28 | 2355 | const SIGALG_LOOKUP *shsigalgs; |
29948ac8 | 2356 | if (s->shared_sigalgs == NULL |
6d047e06 | 2357 | || idx < 0 |
29948ac8 BK |
2358 | || idx >= (int)s->shared_sigalgslen |
2359 | || s->shared_sigalgslen > INT_MAX) | |
0f113f3e | 2360 | return 0; |
29948ac8 | 2361 | shsigalgs = s->shared_sigalgs[idx]; |
4d43ee28 DSH |
2362 | if (phash != NULL) |
2363 | *phash = shsigalgs->hash; | |
2364 | if (psign != NULL) | |
2365 | *psign = shsigalgs->sig; | |
2366 | if (psignhash != NULL) | |
2367 | *psignhash = shsigalgs->sigandhash; | |
2368 | if (rsig != NULL) | |
2369 | *rsig = (unsigned char)(shsigalgs->sigalg & 0xff); | |
2370 | if (rhash != NULL) | |
2371 | *rhash = (unsigned char)((shsigalgs->sigalg >> 8) & 0xff); | |
29948ac8 | 2372 | return (int)s->shared_sigalgslen; |
0f113f3e MC |
2373 | } |
2374 | ||
787ebcaf DSH |
2375 | /* Maximum possible number of unique entries in sigalgs array */ |
2376 | #define TLS_MAX_SIGALGCNT (OSSL_NELEM(sigalg_lookup_tbl) * 2) | |
0f229cce | 2377 | |
0f113f3e MC |
2378 | typedef struct { |
2379 | size_t sigalgcnt; | |
fd5e1a8c BK |
2380 | /* TLSEXT_SIGALG_XXX values */ |
2381 | uint16_t sigalgs[TLS_MAX_SIGALGCNT]; | |
0f113f3e | 2382 | } sig_cb_st; |
0f229cce | 2383 | |
431f458d DSH |
2384 | static void get_sigorhash(int *psig, int *phash, const char *str) |
2385 | { | |
2386 | if (strcmp(str, "RSA") == 0) { | |
2387 | *psig = EVP_PKEY_RSA; | |
b2eb6998 DSH |
2388 | } else if (strcmp(str, "RSA-PSS") == 0 || strcmp(str, "PSS") == 0) { |
2389 | *psig = EVP_PKEY_RSA_PSS; | |
431f458d DSH |
2390 | } else if (strcmp(str, "DSA") == 0) { |
2391 | *psig = EVP_PKEY_DSA; | |
2392 | } else if (strcmp(str, "ECDSA") == 0) { | |
2393 | *psig = EVP_PKEY_EC; | |
2394 | } else { | |
2395 | *phash = OBJ_sn2nid(str); | |
2396 | if (*phash == NID_undef) | |
2397 | *phash = OBJ_ln2nid(str); | |
2398 | } | |
2399 | } | |
787ebcaf DSH |
2400 | /* Maximum length of a signature algorithm string component */ |
2401 | #define TLS_MAX_SIGSTRING_LEN 40 | |
431f458d | 2402 | |
0f229cce | 2403 | static int sig_cb(const char *elem, int len, void *arg) |
0f113f3e MC |
2404 | { |
2405 | sig_cb_st *sarg = arg; | |
2406 | size_t i; | |
fd5e1a8c | 2407 | const SIGALG_LOOKUP *s; |
787ebcaf | 2408 | char etmp[TLS_MAX_SIGSTRING_LEN], *p; |
431f458d | 2409 | int sig_alg = NID_undef, hash_alg = NID_undef; |
2747d73c KR |
2410 | if (elem == NULL) |
2411 | return 0; | |
787ebcaf | 2412 | if (sarg->sigalgcnt == TLS_MAX_SIGALGCNT) |
0f113f3e MC |
2413 | return 0; |
2414 | if (len > (int)(sizeof(etmp) - 1)) | |
2415 | return 0; | |
2416 | memcpy(etmp, elem, len); | |
2417 | etmp[len] = 0; | |
2418 | p = strchr(etmp, '+'); | |
fd5e1a8c BK |
2419 | /* |
2420 | * We only allow SignatureSchemes listed in the sigalg_lookup_tbl; | |
2421 | * if there's no '+' in the provided name, look for the new-style combined | |
2422 | * name. If not, match both sig+hash to find the needed SIGALG_LOOKUP. | |
2423 | * Just sig+hash is not unique since TLS 1.3 adds rsa_pss_pss_* and | |
2424 | * rsa_pss_rsae_* that differ only by public key OID; in such cases | |
2425 | * we will pick the _rsae_ variant, by virtue of them appearing earlier | |
2426 | * in the table. | |
2427 | */ | |
8a43a42a | 2428 | if (p == NULL) { |
8a43a42a DSH |
2429 | for (i = 0, s = sigalg_lookup_tbl; i < OSSL_NELEM(sigalg_lookup_tbl); |
2430 | i++, s++) { | |
2431 | if (s->name != NULL && strcmp(etmp, s->name) == 0) { | |
fd5e1a8c | 2432 | sarg->sigalgs[sarg->sigalgcnt++] = s->sigalg; |
8a43a42a DSH |
2433 | break; |
2434 | } | |
2435 | } | |
fd5e1a8c BK |
2436 | if (i == OSSL_NELEM(sigalg_lookup_tbl)) |
2437 | return 0; | |
8a43a42a DSH |
2438 | } else { |
2439 | *p = 0; | |
2440 | p++; | |
2441 | if (*p == 0) | |
2442 | return 0; | |
2443 | get_sigorhash(&sig_alg, &hash_alg, etmp); | |
2444 | get_sigorhash(&sig_alg, &hash_alg, p); | |
fd5e1a8c BK |
2445 | if (sig_alg == NID_undef || hash_alg == NID_undef) |
2446 | return 0; | |
2447 | for (i = 0, s = sigalg_lookup_tbl; i < OSSL_NELEM(sigalg_lookup_tbl); | |
2448 | i++, s++) { | |
2449 | if (s->hash == hash_alg && s->sig == sig_alg) { | |
2450 | sarg->sigalgs[sarg->sigalgcnt++] = s->sigalg; | |
2451 | break; | |
2452 | } | |
2453 | } | |
2454 | if (i == OSSL_NELEM(sigalg_lookup_tbl)) | |
2455 | return 0; | |
8a43a42a | 2456 | } |
0f113f3e | 2457 | |
fd5e1a8c BK |
2458 | /* Reject duplicates */ |
2459 | for (i = 0; i < sarg->sigalgcnt - 1; i++) { | |
c1acef92 | 2460 | if (sarg->sigalgs[i] == sarg->sigalgs[sarg->sigalgcnt - 1]) { |
fd5e1a8c | 2461 | sarg->sigalgcnt--; |
0f113f3e | 2462 | return 0; |
fd5e1a8c | 2463 | } |
0f113f3e | 2464 | } |
0f113f3e MC |
2465 | return 1; |
2466 | } | |
2467 | ||
2468 | /* | |
9d22666e | 2469 | * Set supported signature algorithms based on a colon separated list of the |
0f113f3e MC |
2470 | * form sig+hash e.g. RSA+SHA512:DSA+SHA512 |
2471 | */ | |
3dbc46df | 2472 | int tls1_set_sigalgs_list(CERT *c, const char *str, int client) |
0f113f3e MC |
2473 | { |
2474 | sig_cb_st sig; | |
2475 | sig.sigalgcnt = 0; | |
2476 | if (!CONF_parse_list(str, ':', 1, sig_cb, &sig)) | |
2477 | return 0; | |
2478 | if (c == NULL) | |
2479 | return 1; | |
fd5e1a8c BK |
2480 | return tls1_set_raw_sigalgs(c, sig.sigalgs, sig.sigalgcnt, client); |
2481 | } | |
2482 | ||
2483 | int tls1_set_raw_sigalgs(CERT *c, const uint16_t *psigs, size_t salglen, | |
2484 | int client) | |
2485 | { | |
2486 | uint16_t *sigalgs; | |
2487 | ||
cdb10bae | 2488 | if ((sigalgs = OPENSSL_malloc(salglen * sizeof(*sigalgs))) == NULL) { |
6849b73c | 2489 | ERR_raise(ERR_LIB_SSL, ERR_R_MALLOC_FAILURE); |
fd5e1a8c | 2490 | return 0; |
cdb10bae | 2491 | } |
fd5e1a8c BK |
2492 | memcpy(sigalgs, psigs, salglen * sizeof(*sigalgs)); |
2493 | ||
2494 | if (client) { | |
2495 | OPENSSL_free(c->client_sigalgs); | |
2496 | c->client_sigalgs = sigalgs; | |
2497 | c->client_sigalgslen = salglen; | |
2498 | } else { | |
2499 | OPENSSL_free(c->conf_sigalgs); | |
2500 | c->conf_sigalgs = sigalgs; | |
2501 | c->conf_sigalgslen = salglen; | |
2502 | } | |
2503 | ||
2504 | return 1; | |
0f113f3e MC |
2505 | } |
2506 | ||
a230b26e | 2507 | int tls1_set_sigalgs(CERT *c, const int *psig_nids, size_t salglen, int client) |
0f113f3e | 2508 | { |
98c792d1 | 2509 | uint16_t *sigalgs, *sptr; |
0f113f3e | 2510 | size_t i; |
63c1df09 | 2511 | |
0f113f3e MC |
2512 | if (salglen & 1) |
2513 | return 0; | |
cdb10bae | 2514 | if ((sigalgs = OPENSSL_malloc((salglen / 2) * sizeof(*sigalgs))) == NULL) { |
6849b73c | 2515 | ERR_raise(ERR_LIB_SSL, ERR_R_MALLOC_FAILURE); |
0f113f3e | 2516 | return 0; |
cdb10bae | 2517 | } |
0f113f3e | 2518 | for (i = 0, sptr = sigalgs; i < salglen; i += 2) { |
63c1df09 | 2519 | size_t j; |
7a531ee4 | 2520 | const SIGALG_LOOKUP *curr; |
63c1df09 MC |
2521 | int md_id = *psig_nids++; |
2522 | int sig_id = *psig_nids++; | |
2523 | ||
2524 | for (j = 0, curr = sigalg_lookup_tbl; j < OSSL_NELEM(sigalg_lookup_tbl); | |
2525 | j++, curr++) { | |
fe3066ee | 2526 | if (curr->hash == md_id && curr->sig == sig_id) { |
63c1df09 MC |
2527 | *sptr++ = curr->sigalg; |
2528 | break; | |
2529 | } | |
2530 | } | |
0f113f3e | 2531 | |
63c1df09 | 2532 | if (j == OSSL_NELEM(sigalg_lookup_tbl)) |
0f113f3e | 2533 | goto err; |
0f113f3e MC |
2534 | } |
2535 | ||
2536 | if (client) { | |
b548a1f1 | 2537 | OPENSSL_free(c->client_sigalgs); |
0f113f3e | 2538 | c->client_sigalgs = sigalgs; |
7a531ee4 | 2539 | c->client_sigalgslen = salglen / 2; |
0f113f3e | 2540 | } else { |
b548a1f1 | 2541 | OPENSSL_free(c->conf_sigalgs); |
0f113f3e | 2542 | c->conf_sigalgs = sigalgs; |
7a531ee4 | 2543 | c->conf_sigalgslen = salglen / 2; |
0f113f3e MC |
2544 | } |
2545 | ||
2546 | return 1; | |
2547 | ||
2548 | err: | |
2549 | OPENSSL_free(sigalgs); | |
2550 | return 0; | |
2551 | } | |
4453cd8c | 2552 | |
29948ac8 | 2553 | static int tls1_check_sig_alg(SSL *s, X509 *x, int default_nid) |
0f113f3e | 2554 | { |
5235ef44 | 2555 | int sig_nid, use_pc_sigalgs = 0; |
0f113f3e | 2556 | size_t i; |
5235ef44 MC |
2557 | const SIGALG_LOOKUP *sigalg; |
2558 | size_t sigalgslen; | |
0f113f3e MC |
2559 | if (default_nid == -1) |
2560 | return 1; | |
2561 | sig_nid = X509_get_signature_nid(x); | |
2562 | if (default_nid) | |
2563 | return sig_nid == default_nid ? 1 : 0; | |
5235ef44 MC |
2564 | |
2565 | if (SSL_IS_TLS13(s) && s->s3.tmp.peer_cert_sigalgs != NULL) { | |
2566 | /* | |
2567 | * If we're in TLSv1.3 then we only get here if we're checking the | |
2568 | * chain. If the peer has specified peer_cert_sigalgs then we use them | |
2569 | * otherwise we default to normal sigalgs. | |
2570 | */ | |
2571 | sigalgslen = s->s3.tmp.peer_cert_sigalgslen; | |
2572 | use_pc_sigalgs = 1; | |
2573 | } else { | |
2574 | sigalgslen = s->shared_sigalgslen; | |
2575 | } | |
2576 | for (i = 0; i < sigalgslen; i++) { | |
2577 | sigalg = use_pc_sigalgs | |
263ff2c9 | 2578 | ? tls1_lookup_sigalg(s, s->s3.tmp.peer_cert_sigalgs[i]) |
5235ef44 | 2579 | : s->shared_sigalgs[i]; |
a87f3fe0 | 2580 | if (sigalg != NULL && sig_nid == sigalg->sigandhash) |
0f113f3e | 2581 | return 1; |
5235ef44 | 2582 | } |
0f113f3e MC |
2583 | return 0; |
2584 | } | |
2585 | ||
6dbb6219 DSH |
2586 | /* Check to see if a certificate issuer name matches list of CA names */ |
2587 | static int ssl_check_ca_name(STACK_OF(X509_NAME) *names, X509 *x) | |
0f113f3e | 2588 | { |
8cc86b81 | 2589 | const X509_NAME *nm; |
0f113f3e MC |
2590 | int i; |
2591 | nm = X509_get_issuer_name(x); | |
2592 | for (i = 0; i < sk_X509_NAME_num(names); i++) { | |
2593 | if (!X509_NAME_cmp(nm, sk_X509_NAME_value(names, i))) | |
2594 | return 1; | |
2595 | } | |
2596 | return 0; | |
2597 | } | |
2598 | ||
2599 | /* | |
2600 | * Check certificate chain is consistent with TLS extensions and is usable by | |
2601 | * server. This servers two purposes: it allows users to check chains before | |
2602 | * passing them to the server and it allows the server to check chains before | |
2603 | * attempting to use them. | |
d61ff83b | 2604 | */ |
6dbb6219 | 2605 | |
69687aa8 | 2606 | /* Flags which need to be set for a certificate when strict mode not set */ |
6dbb6219 | 2607 | |
e481f9b9 | 2608 | #define CERT_PKEY_VALID_FLAGS \ |
0f113f3e | 2609 | (CERT_PKEY_EE_SIGNATURE|CERT_PKEY_EE_PARAM) |
6dbb6219 | 2610 | /* Strict mode flags */ |
e481f9b9 | 2611 | #define CERT_PKEY_STRICT_FLAGS \ |
0f113f3e MC |
2612 | (CERT_PKEY_VALID_FLAGS|CERT_PKEY_CA_SIGNATURE|CERT_PKEY_CA_PARAM \ |
2613 | | CERT_PKEY_ISSUER_NAME|CERT_PKEY_CERT_TYPE) | |
6dbb6219 | 2614 | |
d61ff83b | 2615 | int tls1_check_chain(SSL *s, X509 *x, EVP_PKEY *pk, STACK_OF(X509) *chain, |
0f113f3e MC |
2616 | int idx) |
2617 | { | |
2618 | int i; | |
2619 | int rv = 0; | |
2620 | int check_flags = 0, strict_mode; | |
2621 | CERT_PKEY *cpk = NULL; | |
2622 | CERT *c = s->cert; | |
f7d53487 | 2623 | uint32_t *pvalid; |
0f113f3e MC |
2624 | unsigned int suiteb_flags = tls1_suiteb(s); |
2625 | /* idx == -1 means checking server chains */ | |
2626 | if (idx != -1) { | |
2627 | /* idx == -2 means checking client certificate chains */ | |
2628 | if (idx == -2) { | |
2629 | cpk = c->key; | |
348240c6 | 2630 | idx = (int)(cpk - c->pkeys); |
0f113f3e MC |
2631 | } else |
2632 | cpk = c->pkeys + idx; | |
555cbb32 | 2633 | pvalid = s->s3.tmp.valid_flags + idx; |
0f113f3e MC |
2634 | x = cpk->x509; |
2635 | pk = cpk->privatekey; | |
2636 | chain = cpk->chain; | |
2637 | strict_mode = c->cert_flags & SSL_CERT_FLAGS_CHECK_TLS_STRICT; | |
2638 | /* If no cert or key, forget it */ | |
2639 | if (!x || !pk) | |
2640 | goto end; | |
0f113f3e | 2641 | } else { |
52fd27f9 DSH |
2642 | size_t certidx; |
2643 | ||
0f113f3e | 2644 | if (!x || !pk) |
d813f9eb | 2645 | return 0; |
52fd27f9 DSH |
2646 | |
2647 | if (ssl_cert_lookup_by_pkey(pk, &certidx) == NULL) | |
d813f9eb | 2648 | return 0; |
52fd27f9 | 2649 | idx = certidx; |
555cbb32 | 2650 | pvalid = s->s3.tmp.valid_flags + idx; |
6383d316 | 2651 | |
0f113f3e MC |
2652 | if (c->cert_flags & SSL_CERT_FLAGS_CHECK_TLS_STRICT) |
2653 | check_flags = CERT_PKEY_STRICT_FLAGS; | |
2654 | else | |
2655 | check_flags = CERT_PKEY_VALID_FLAGS; | |
2656 | strict_mode = 1; | |
2657 | } | |
2658 | ||
2659 | if (suiteb_flags) { | |
2660 | int ok; | |
2661 | if (check_flags) | |
2662 | check_flags |= CERT_PKEY_SUITEB; | |
2663 | ok = X509_chain_check_suiteb(NULL, x, chain, suiteb_flags); | |
2664 | if (ok == X509_V_OK) | |
2665 | rv |= CERT_PKEY_SUITEB; | |
2666 | else if (!check_flags) | |
2667 | goto end; | |
2668 | } | |
2669 | ||
2670 | /* | |
2671 | * Check all signature algorithms are consistent with signature | |
2672 | * algorithms extension if TLS 1.2 or later and strict mode. | |
2673 | */ | |
2674 | if (TLS1_get_version(s) >= TLS1_2_VERSION && strict_mode) { | |
2675 | int default_nid; | |
536199ec | 2676 | int rsign = 0; |
555cbb32 TS |
2677 | if (s->s3.tmp.peer_cert_sigalgs != NULL |
2678 | || s->s3.tmp.peer_sigalgs != NULL) { | |
0f113f3e MC |
2679 | default_nid = 0; |
2680 | /* If no sigalgs extension use defaults from RFC5246 */ | |
c589c34e | 2681 | } else { |
0f113f3e | 2682 | switch (idx) { |
d0ff28f8 | 2683 | case SSL_PKEY_RSA: |
536199ec | 2684 | rsign = EVP_PKEY_RSA; |
0f113f3e MC |
2685 | default_nid = NID_sha1WithRSAEncryption; |
2686 | break; | |
2687 | ||
2688 | case SSL_PKEY_DSA_SIGN: | |
536199ec | 2689 | rsign = EVP_PKEY_DSA; |
0f113f3e MC |
2690 | default_nid = NID_dsaWithSHA1; |
2691 | break; | |
2692 | ||
2693 | case SSL_PKEY_ECC: | |
536199ec | 2694 | rsign = EVP_PKEY_EC; |
0f113f3e MC |
2695 | default_nid = NID_ecdsa_with_SHA1; |
2696 | break; | |
2697 | ||
e44380a9 | 2698 | case SSL_PKEY_GOST01: |
536199ec | 2699 | rsign = NID_id_GostR3410_2001; |
e44380a9 DB |
2700 | default_nid = NID_id_GostR3411_94_with_GostR3410_2001; |
2701 | break; | |
2702 | ||
2703 | case SSL_PKEY_GOST12_256: | |
536199ec | 2704 | rsign = NID_id_GostR3410_2012_256; |
e44380a9 DB |
2705 | default_nid = NID_id_tc26_signwithdigest_gost3410_2012_256; |
2706 | break; | |
2707 | ||
2708 | case SSL_PKEY_GOST12_512: | |
536199ec | 2709 | rsign = NID_id_GostR3410_2012_512; |
e44380a9 DB |
2710 | default_nid = NID_id_tc26_signwithdigest_gost3410_2012_512; |
2711 | break; | |
2712 | ||
0f113f3e MC |
2713 | default: |
2714 | default_nid = -1; | |
2715 | break; | |
2716 | } | |
2717 | } | |
2718 | /* | |
2719 | * If peer sent no signature algorithms extension and we have set | |
2720 | * preferred signature algorithms check we support sha1. | |
2721 | */ | |
2722 | if (default_nid > 0 && c->conf_sigalgs) { | |
2723 | size_t j; | |
98c792d1 | 2724 | const uint16_t *p = c->conf_sigalgs; |
703bcee0 | 2725 | for (j = 0; j < c->conf_sigalgslen; j++, p++) { |
263ff2c9 | 2726 | const SIGALG_LOOKUP *lu = tls1_lookup_sigalg(s, *p); |
44b6318f DSH |
2727 | |
2728 | if (lu != NULL && lu->hash == NID_sha1 && lu->sig == rsign) | |
0f113f3e MC |
2729 | break; |
2730 | } | |
2731 | if (j == c->conf_sigalgslen) { | |
2732 | if (check_flags) | |
2733 | goto skip_sigs; | |
2734 | else | |
2735 | goto end; | |
2736 | } | |
2737 | } | |
2738 | /* Check signature algorithm of each cert in chain */ | |
5235ef44 MC |
2739 | if (SSL_IS_TLS13(s)) { |
2740 | /* | |
2741 | * We only get here if the application has called SSL_check_chain(), | |
2742 | * so check_flags is always set. | |
2743 | */ | |
2744 | if (find_sig_alg(s, x, pk) != NULL) | |
2745 | rv |= CERT_PKEY_EE_SIGNATURE; | |
2746 | } else if (!tls1_check_sig_alg(s, x, default_nid)) { | |
0f113f3e MC |
2747 | if (!check_flags) |
2748 | goto end; | |
2749 | } else | |
2750 | rv |= CERT_PKEY_EE_SIGNATURE; | |
2751 | rv |= CERT_PKEY_CA_SIGNATURE; | |
2752 | for (i = 0; i < sk_X509_num(chain); i++) { | |
29948ac8 | 2753 | if (!tls1_check_sig_alg(s, sk_X509_value(chain, i), default_nid)) { |
0f113f3e MC |
2754 | if (check_flags) { |
2755 | rv &= ~CERT_PKEY_CA_SIGNATURE; | |
2756 | break; | |
2757 | } else | |
2758 | goto end; | |
2759 | } | |
2760 | } | |
2761 | } | |
2762 | /* Else not TLS 1.2, so mark EE and CA signing algorithms OK */ | |
2763 | else if (check_flags) | |
2764 | rv |= CERT_PKEY_EE_SIGNATURE | CERT_PKEY_CA_SIGNATURE; | |
2765 | skip_sigs: | |
2766 | /* Check cert parameters are consistent */ | |
9195ddcd | 2767 | if (tls1_check_cert_param(s, x, 1)) |
0f113f3e MC |
2768 | rv |= CERT_PKEY_EE_PARAM; |
2769 | else if (!check_flags) | |
2770 | goto end; | |
2771 | if (!s->server) | |
2772 | rv |= CERT_PKEY_CA_PARAM; | |
2773 | /* In strict mode check rest of chain too */ | |
2774 | else if (strict_mode) { | |
2775 | rv |= CERT_PKEY_CA_PARAM; | |
2776 | for (i = 0; i < sk_X509_num(chain); i++) { | |
2777 | X509 *ca = sk_X509_value(chain, i); | |
2778 | if (!tls1_check_cert_param(s, ca, 0)) { | |
2779 | if (check_flags) { | |
2780 | rv &= ~CERT_PKEY_CA_PARAM; | |
2781 | break; | |
2782 | } else | |
2783 | goto end; | |
2784 | } | |
2785 | } | |
2786 | } | |
2787 | if (!s->server && strict_mode) { | |
2788 | STACK_OF(X509_NAME) *ca_dn; | |
2789 | int check_type = 0; | |
c2041da8 RL |
2790 | |
2791 | if (EVP_PKEY_is_a(pk, "RSA")) | |
0f113f3e | 2792 | check_type = TLS_CT_RSA_SIGN; |
c2041da8 | 2793 | else if (EVP_PKEY_is_a(pk, "DSA")) |
0f113f3e | 2794 | check_type = TLS_CT_DSS_SIGN; |
c2041da8 | 2795 | else if (EVP_PKEY_is_a(pk, "EC")) |
0f113f3e | 2796 | check_type = TLS_CT_ECDSA_SIGN; |
c2041da8 | 2797 | |
0f113f3e | 2798 | if (check_type) { |
555cbb32 | 2799 | const uint8_t *ctypes = s->s3.tmp.ctype; |
75c13e78 DSH |
2800 | size_t j; |
2801 | ||
555cbb32 | 2802 | for (j = 0; j < s->s3.tmp.ctype_len; j++, ctypes++) { |
75c13e78 | 2803 | if (*ctypes == check_type) { |
0f113f3e MC |
2804 | rv |= CERT_PKEY_CERT_TYPE; |
2805 | break; | |
2806 | } | |
2807 | } | |
2808 | if (!(rv & CERT_PKEY_CERT_TYPE) && !check_flags) | |
2809 | goto end; | |
75c13e78 | 2810 | } else { |
0f113f3e | 2811 | rv |= CERT_PKEY_CERT_TYPE; |
75c13e78 | 2812 | } |
0f113f3e | 2813 | |
555cbb32 | 2814 | ca_dn = s->s3.tmp.peer_ca_names; |
0f113f3e MC |
2815 | |
2816 | if (!sk_X509_NAME_num(ca_dn)) | |
2817 | rv |= CERT_PKEY_ISSUER_NAME; | |
2818 | ||
2819 | if (!(rv & CERT_PKEY_ISSUER_NAME)) { | |
2820 | if (ssl_check_ca_name(ca_dn, x)) | |
2821 | rv |= CERT_PKEY_ISSUER_NAME; | |
2822 | } | |
2823 | if (!(rv & CERT_PKEY_ISSUER_NAME)) { | |
2824 | for (i = 0; i < sk_X509_num(chain); i++) { | |
2825 | X509 *xtmp = sk_X509_value(chain, i); | |
2826 | if (ssl_check_ca_name(ca_dn, xtmp)) { | |
2827 | rv |= CERT_PKEY_ISSUER_NAME; | |
2828 | break; | |
2829 | } | |
2830 | } | |
2831 | } | |
2832 | if (!check_flags && !(rv & CERT_PKEY_ISSUER_NAME)) | |
2833 | goto end; | |
2834 | } else | |
2835 | rv |= CERT_PKEY_ISSUER_NAME | CERT_PKEY_CERT_TYPE; | |
2836 | ||
2837 | if (!check_flags || (rv & check_flags) == check_flags) | |
2838 | rv |= CERT_PKEY_VALID; | |
2839 | ||
2840 | end: | |
2841 | ||
a8bb912d DSH |
2842 | if (TLS1_get_version(s) >= TLS1_2_VERSION) |
2843 | rv |= *pvalid & (CERT_PKEY_EXPLICIT_SIGN | CERT_PKEY_SIGN); | |
2844 | else | |
0f113f3e MC |
2845 | rv |= CERT_PKEY_SIGN | CERT_PKEY_EXPLICIT_SIGN; |
2846 | ||
2847 | /* | |
2848 | * When checking a CERT_PKEY structure all flags are irrelevant if the | |
2849 | * chain is invalid. | |
2850 | */ | |
2851 | if (!check_flags) { | |
a8bb912d | 2852 | if (rv & CERT_PKEY_VALID) { |
6383d316 | 2853 | *pvalid = rv; |
a8bb912d DSH |
2854 | } else { |
2855 | /* Preserve sign and explicit sign flag, clear rest */ | |
2856 | *pvalid &= CERT_PKEY_EXPLICIT_SIGN | CERT_PKEY_SIGN; | |
0f113f3e MC |
2857 | return 0; |
2858 | } | |
2859 | } | |
2860 | return rv; | |
2861 | } | |
d61ff83b DSH |
2862 | |
2863 | /* Set validity of certificates in an SSL structure */ | |
2864 | void tls1_set_cert_validity(SSL *s) | |
0f113f3e | 2865 | { |
d0ff28f8 | 2866 | tls1_check_chain(s, NULL, NULL, NULL, SSL_PKEY_RSA); |
045d078a | 2867 | tls1_check_chain(s, NULL, NULL, NULL, SSL_PKEY_RSA_PSS_SIGN); |
17dd65e6 | 2868 | tls1_check_chain(s, NULL, NULL, NULL, SSL_PKEY_DSA_SIGN); |
17dd65e6 | 2869 | tls1_check_chain(s, NULL, NULL, NULL, SSL_PKEY_ECC); |
e44380a9 DB |
2870 | tls1_check_chain(s, NULL, NULL, NULL, SSL_PKEY_GOST01); |
2871 | tls1_check_chain(s, NULL, NULL, NULL, SSL_PKEY_GOST12_256); | |
2872 | tls1_check_chain(s, NULL, NULL, NULL, SSL_PKEY_GOST12_512); | |
3d234c9e | 2873 | tls1_check_chain(s, NULL, NULL, NULL, SSL_PKEY_ED25519); |
0e1d6ecf | 2874 | tls1_check_chain(s, NULL, NULL, NULL, SSL_PKEY_ED448); |
0f113f3e MC |
2875 | } |
2876 | ||
69687aa8 | 2877 | /* User level utility function to check a chain is suitable */ |
18d71588 | 2878 | int SSL_check_chain(SSL *s, X509 *x, EVP_PKEY *pk, STACK_OF(X509) *chain) |
0f113f3e MC |
2879 | { |
2880 | return tls1_check_chain(s, x, pk, chain, -1); | |
2881 | } | |
d61ff83b | 2882 | |
091f6074 | 2883 | EVP_PKEY *ssl_get_auto_dh(SSL *s) |
0f113f3e | 2884 | { |
091f6074 MC |
2885 | EVP_PKEY *dhp = NULL; |
2886 | BIGNUM *p; | |
d7b5c648 | 2887 | int dh_secbits = 80, sec_level_bits; |
091f6074 MC |
2888 | EVP_PKEY_CTX *pctx = NULL; |
2889 | OSSL_PARAM_BLD *tmpl = NULL; | |
2890 | OSSL_PARAM *params = NULL; | |
2891 | ||
7646610b HK |
2892 | if (s->cert->dh_tmp_auto != 2) { |
2893 | if (s->s3.tmp.new_cipher->algorithm_auth & (SSL_aNULL | SSL_aPSK)) { | |
2894 | if (s->s3.tmp.new_cipher->strength_bits == 256) | |
2895 | dh_secbits = 128; | |
2896 | else | |
2897 | dh_secbits = 80; | |
2898 | } else { | |
2899 | if (s->s3.tmp.cert == NULL) | |
2900 | return NULL; | |
ed576acd | 2901 | dh_secbits = EVP_PKEY_get_security_bits(s->s3.tmp.cert->privatekey); |
7646610b | 2902 | } |
0f113f3e MC |
2903 | } |
2904 | ||
d7b5c648 P |
2905 | /* Do not pick a prime that is too weak for the current security level */ |
2906 | sec_level_bits = ssl_get_security_level_bits(s, NULL, NULL); | |
2907 | if (dh_secbits < sec_level_bits) | |
2908 | dh_secbits = sec_level_bits; | |
2909 | ||
7646610b HK |
2910 | if (dh_secbits >= 192) |
2911 | p = BN_get_rfc3526_prime_8192(NULL); | |
2912 | else if (dh_secbits >= 152) | |
2913 | p = BN_get_rfc3526_prime_4096(NULL); | |
2914 | else if (dh_secbits >= 128) | |
2915 | p = BN_get_rfc3526_prime_3072(NULL); | |
2916 | else if (dh_secbits >= 112) | |
2917 | p = BN_get_rfc3526_prime_2048(NULL); | |
2918 | else | |
2919 | p = BN_get_rfc2409_prime_1024(NULL); | |
091f6074 MC |
2920 | if (p == NULL) |
2921 | goto err; | |
2922 | ||
2923 | pctx = EVP_PKEY_CTX_new_from_name(s->ctx->libctx, "DH", s->ctx->propq); | |
2924 | if (pctx == NULL | |
2db985b7 | 2925 | || EVP_PKEY_fromdata_init(pctx) != 1) |
091f6074 MC |
2926 | goto err; |
2927 | ||
2928 | tmpl = OSSL_PARAM_BLD_new(); | |
2929 | if (tmpl == NULL | |
2930 | || !OSSL_PARAM_BLD_push_BN(tmpl, OSSL_PKEY_PARAM_FFC_P, p) | |
2931 | || !OSSL_PARAM_BLD_push_uint(tmpl, OSSL_PKEY_PARAM_FFC_G, 2)) | |
2932 | goto err; | |
2933 | ||
2934 | params = OSSL_PARAM_BLD_to_param(tmpl); | |
2db985b7 SL |
2935 | if (params == NULL |
2936 | || EVP_PKEY_fromdata(pctx, &dhp, EVP_PKEY_KEY_PARAMETERS, params) != 1) | |
091f6074 MC |
2937 | goto err; |
2938 | ||
2939 | err: | |
3f883c7c | 2940 | OSSL_PARAM_free(params); |
091f6074 MC |
2941 | OSSL_PARAM_BLD_free(tmpl); |
2942 | EVP_PKEY_CTX_free(pctx); | |
2943 | BN_free(p); | |
7646610b | 2944 | return dhp; |
0f113f3e | 2945 | } |
b362ccab DSH |
2946 | |
2947 | static int ssl_security_cert_key(SSL *s, SSL_CTX *ctx, X509 *x, int op) | |
0f113f3e | 2948 | { |
72245f34 | 2949 | int secbits = -1; |
8382fd3a | 2950 | EVP_PKEY *pkey = X509_get0_pubkey(x); |
0f113f3e | 2951 | if (pkey) { |
72245f34 DSH |
2952 | /* |
2953 | * If no parameters this will return -1 and fail using the default | |
2954 | * security callback for any non-zero security level. This will | |
2955 | * reject keys which omit parameters but this only affects DSA and | |
2956 | * omission of parameters is never (?) done in practice. | |
2957 | */ | |
ed576acd | 2958 | secbits = EVP_PKEY_get_security_bits(pkey); |
72245f34 | 2959 | } |
0f113f3e MC |
2960 | if (s) |
2961 | return ssl_security(s, op, secbits, 0, x); | |
2962 | else | |
2963 | return ssl_ctx_security(ctx, op, secbits, 0, x); | |
2964 | } | |
b362ccab DSH |
2965 | |
2966 | static int ssl_security_cert_sig(SSL *s, SSL_CTX *ctx, X509 *x, int op) | |
0f113f3e MC |
2967 | { |
2968 | /* Lookup signature algorithm digest */ | |
65e89736 | 2969 | int secbits, nid, pknid; |
221c7b55 DSH |
2970 | /* Don't check signature if self signed */ |
2971 | if ((X509_get_extension_flags(x) & EXFLAG_SS) != 0) | |
2972 | return 1; | |
65e89736 DSH |
2973 | if (!X509_get_signature_info(x, &nid, &pknid, &secbits, NULL)) |
2974 | secbits = -1; | |
2975 | /* If digest NID not defined use signature NID */ | |
2976 | if (nid == NID_undef) | |
2977 | nid = pknid; | |
0f113f3e | 2978 | if (s) |
65e89736 | 2979 | return ssl_security(s, op, secbits, nid, x); |
0f113f3e | 2980 | else |
65e89736 | 2981 | return ssl_ctx_security(ctx, op, secbits, nid, x); |
0f113f3e | 2982 | } |
b362ccab DSH |
2983 | |
2984 | int ssl_security_cert(SSL *s, SSL_CTX *ctx, X509 *x, int vfy, int is_ee) | |
0f113f3e MC |
2985 | { |
2986 | if (vfy) | |
2987 | vfy = SSL_SECOP_PEER; | |
2988 | if (is_ee) { | |
2989 | if (!ssl_security_cert_key(s, ctx, x, SSL_SECOP_EE_KEY | vfy)) | |
2990 | return SSL_R_EE_KEY_TOO_SMALL; | |
2991 | } else { | |
2992 | if (!ssl_security_cert_key(s, ctx, x, SSL_SECOP_CA_KEY | vfy)) | |
2993 | return SSL_R_CA_KEY_TOO_SMALL; | |
2994 | } | |
2995 | if (!ssl_security_cert_sig(s, ctx, x, SSL_SECOP_CA_MD | vfy)) | |
2996 | return SSL_R_CA_MD_TOO_WEAK; | |
2997 | return 1; | |
2998 | } | |
2999 | ||
3000 | /* | |
69687aa8 F |
3001 | * Check security of a chain, if |sk| includes the end entity certificate then |
3002 | * |x| is NULL. If |vfy| is 1 then we are verifying a peer chain and not sending | |
0f113f3e | 3003 | * one to the peer. Return values: 1 if ok otherwise error code to use |
b362ccab DSH |
3004 | */ |
3005 | ||
3006 | int ssl_security_cert_chain(SSL *s, STACK_OF(X509) *sk, X509 *x, int vfy) | |
0f113f3e MC |
3007 | { |
3008 | int rv, start_idx, i; | |
3009 | if (x == NULL) { | |
3010 | x = sk_X509_value(sk, 0); | |
3011 | start_idx = 1; | |
3012 | } else | |
3013 | start_idx = 0; | |
3014 | ||
3015 | rv = ssl_security_cert(s, NULL, x, vfy, 1); | |
3016 | if (rv != 1) | |
3017 | return rv; | |
3018 | ||
3019 | for (i = start_idx; i < sk_X509_num(sk); i++) { | |
3020 | x = sk_X509_value(sk, i); | |
3021 | rv = ssl_security_cert(s, NULL, x, vfy, 0); | |
3022 | if (rv != 1) | |
3023 | return rv; | |
3024 | } | |
3025 | return 1; | |
3026 | } | |
93a77f9e | 3027 | |
7f6b466b DSH |
3028 | /* |
3029 | * For TLS 1.2 servers check if we have a certificate which can be used | |
b46867d7 | 3030 | * with the signature algorithm "lu" and return index of certificate. |
7f6b466b DSH |
3031 | */ |
3032 | ||
b46867d7 | 3033 | static int tls12_get_cert_sigalg_idx(const SSL *s, const SIGALG_LOOKUP *lu) |
7f6b466b | 3034 | { |
b46867d7 DSH |
3035 | int sig_idx = lu->sig_idx; |
3036 | const SSL_CERT_LOOKUP *clu = ssl_cert_lookup_by_idx(sig_idx); | |
7f6b466b DSH |
3037 | |
3038 | /* If not recognised or not supported by cipher mask it is not suitable */ | |
b8fef8ee | 3039 | if (clu == NULL |
555cbb32 | 3040 | || (clu->amask & s->s3.tmp.new_cipher->algorithm_auth) == 0 |
b8fef8ee | 3041 | || (clu->nid == EVP_PKEY_RSA_PSS |
555cbb32 | 3042 | && (s->s3.tmp.new_cipher->algorithm_mkey & SSL_kRSA) != 0)) |
b46867d7 DSH |
3043 | return -1; |
3044 | ||
555cbb32 | 3045 | return s->s3.tmp.valid_flags[sig_idx] & CERT_PKEY_VALID ? sig_idx : -1; |
7f6b466b DSH |
3046 | } |
3047 | ||
c589c34e | 3048 | /* |
5235ef44 MC |
3049 | * Checks the given cert against signature_algorithm_cert restrictions sent by |
3050 | * the peer (if any) as well as whether the hash from the sigalg is usable with | |
3051 | * the key. | |
3052 | * Returns true if the cert is usable and false otherwise. | |
c589c34e | 3053 | */ |
5235ef44 MC |
3054 | static int check_cert_usable(SSL *s, const SIGALG_LOOKUP *sig, X509 *x, |
3055 | EVP_PKEY *pkey) | |
c589c34e BK |
3056 | { |
3057 | const SIGALG_LOOKUP *lu; | |
ecbb2fca | 3058 | int mdnid, pknid, supported; |
c589c34e | 3059 | size_t i; |
e9fe0f7e | 3060 | const char *mdname = NULL; |
c589c34e | 3061 | |
b5a27688 | 3062 | /* |
e9fe0f7e | 3063 | * If the given EVP_PKEY cannot support signing with this digest, |
b5a27688 DW |
3064 | * the answer is simply 'no'. |
3065 | */ | |
e9fe0f7e TM |
3066 | if (sig->hash != NID_undef) |
3067 | mdname = OBJ_nid2sn(sig->hash); | |
3068 | supported = EVP_PKEY_digestsign_supports_digest(pkey, s->ctx->libctx, | |
3069 | mdname, | |
3070 | s->ctx->propq); | |
3071 | if (supported <= 0) | |
b5a27688 DW |
3072 | return 0; |
3073 | ||
3074 | /* | |
3075 | * The TLS 1.3 signature_algorithms_cert extension places restrictions | |
3076 | * on the sigalg with which the certificate was signed (by its issuer). | |
3077 | */ | |
555cbb32 | 3078 | if (s->s3.tmp.peer_cert_sigalgs != NULL) { |
b5a27688 DW |
3079 | if (!X509_get_signature_info(x, &mdnid, &pknid, NULL, NULL)) |
3080 | return 0; | |
555cbb32 | 3081 | for (i = 0; i < s->s3.tmp.peer_cert_sigalgslen; i++) { |
263ff2c9 | 3082 | lu = tls1_lookup_sigalg(s, s->s3.tmp.peer_cert_sigalgs[i]); |
b5a27688 | 3083 | if (lu == NULL) |
c589c34e | 3084 | continue; |
ecbb2fca | 3085 | |
5235ef44 | 3086 | /* |
407820c0 | 3087 | * This does not differentiate between the |
b5a27688 DW |
3088 | * rsa_pss_pss_* and rsa_pss_rsae_* schemes since we do not |
3089 | * have a chain here that lets us look at the key OID in the | |
3090 | * signing certificate. | |
5235ef44 | 3091 | */ |
b5a27688 DW |
3092 | if (mdnid == lu->hash && pknid == lu->sig) |
3093 | return 1; | |
c589c34e BK |
3094 | } |
3095 | return 0; | |
3096 | } | |
b5a27688 | 3097 | |
5235ef44 | 3098 | /* |
b5a27688 DW |
3099 | * Without signat_algorithms_cert, any certificate for which we have |
3100 | * a viable public key is permitted. | |
5235ef44 | 3101 | */ |
ecbb2fca | 3102 | return 1; |
c589c34e BK |
3103 | } |
3104 | ||
5235ef44 MC |
3105 | /* |
3106 | * Returns true if |s| has a usable certificate configured for use | |
3107 | * with signature scheme |sig|. | |
3108 | * "Usable" includes a check for presence as well as applying | |
3109 | * the signature_algorithm_cert restrictions sent by the peer (if any). | |
3110 | * Returns false if no usable certificate is found. | |
3111 | */ | |
3112 | static int has_usable_cert(SSL *s, const SIGALG_LOOKUP *sig, int idx) | |
3113 | { | |
3114 | /* TLS 1.2 callers can override sig->sig_idx, but not TLS 1.3 callers. */ | |
3115 | if (idx == -1) | |
3116 | idx = sig->sig_idx; | |
3117 | if (!ssl_has_cert(s, idx)) | |
3118 | return 0; | |
3119 | ||
3120 | return check_cert_usable(s, sig, s->cert->pkeys[idx].x509, | |
3121 | s->cert->pkeys[idx].privatekey); | |
3122 | } | |
3123 | ||
3124 | /* | |
3125 | * Returns true if the supplied cert |x| and key |pkey| is usable with the | |
3126 | * specified signature scheme |sig|, or false otherwise. | |
3127 | */ | |
3128 | static int is_cert_usable(SSL *s, const SIGALG_LOOKUP *sig, X509 *x, | |
3129 | EVP_PKEY *pkey) | |
3130 | { | |
3131 | size_t idx; | |
3132 | ||
3133 | if (ssl_cert_lookup_by_pkey(pkey, &idx) == NULL) | |
3134 | return 0; | |
3135 | ||
3136 | /* Check the key is consistent with the sig alg */ | |
3137 | if ((int)idx != sig->sig_idx) | |
3138 | return 0; | |
3139 | ||
3140 | return check_cert_usable(s, sig, x, pkey); | |
3141 | } | |
3142 | ||
3143 | /* | |
3144 | * Find a signature scheme that works with the supplied certificate |x| and key | |
3145 | * |pkey|. |x| and |pkey| may be NULL in which case we additionally look at our | |
3146 | * available certs/keys to find one that works. | |
3147 | */ | |
3148 | static const SIGALG_LOOKUP *find_sig_alg(SSL *s, X509 *x, EVP_PKEY *pkey) | |
3149 | { | |
3150 | const SIGALG_LOOKUP *lu = NULL; | |
3151 | size_t i; | |
5235ef44 | 3152 | int curve = -1; |
5235ef44 MC |
3153 | EVP_PKEY *tmppkey; |
3154 | ||
3155 | /* Look for a shared sigalgs matching possible certificates */ | |
3156 | for (i = 0; i < s->shared_sigalgslen; i++) { | |
3157 | lu = s->shared_sigalgs[i]; | |
3158 | ||
3159 | /* Skip SHA1, SHA224, DSA and RSA if not PSS */ | |
3160 | if (lu->hash == NID_sha1 | |
3161 | || lu->hash == NID_sha224 | |
3162 | || lu->sig == EVP_PKEY_DSA | |
3163 | || lu->sig == EVP_PKEY_RSA) | |
3164 | continue; | |
3165 | /* Check that we have a cert, and signature_algorithms_cert */ | |
c8f6c28a | 3166 | if (!tls1_lookup_md(s->ctx, lu, NULL)) |
5235ef44 MC |
3167 | continue; |
3168 | if ((pkey == NULL && !has_usable_cert(s, lu, -1)) | |
3169 | || (pkey != NULL && !is_cert_usable(s, lu, x, pkey))) | |
3170 | continue; | |
3171 | ||
3172 | tmppkey = (pkey != NULL) ? pkey | |
3173 | : s->cert->pkeys[lu->sig_idx].privatekey; | |
3174 | ||
3175 | if (lu->sig == EVP_PKEY_EC) { | |
c2041da8 | 3176 | if (curve == -1) |
d8975dec | 3177 | curve = ssl_get_EC_curve_nid(tmppkey); |
5235ef44 MC |
3178 | if (lu->curve != NID_undef && curve != lu->curve) |
3179 | continue; | |
5235ef44 MC |
3180 | } else if (lu->sig == EVP_PKEY_RSA_PSS) { |
3181 | /* validate that key is large enough for the signature algorithm */ | |
c5f87134 | 3182 | if (!rsa_pss_check_min_key_size(s->ctx, tmppkey, lu)) |
5235ef44 MC |
3183 | continue; |
3184 | } | |
3185 | break; | |
3186 | } | |
3187 | ||
3188 | if (i == s->shared_sigalgslen) | |
3189 | return NULL; | |
3190 | ||
3191 | return lu; | |
3192 | } | |
3193 | ||
93a77f9e DSH |
3194 | /* |
3195 | * Choose an appropriate signature algorithm based on available certificates | |
717a265a DSH |
3196 | * Sets chosen certificate and signature algorithm. |
3197 | * | |
f63a17d6 MC |
3198 | * For servers if we fail to find a required certificate it is a fatal error, |
3199 | * an appropriate error code is set and a TLS alert is sent. | |
717a265a | 3200 | * |
f63a17d6 | 3201 | * For clients fatalerrs is set to 0. If a certificate is not suitable it is not |
717a265a DSH |
3202 | * a fatal error: we will either try another certificate or not present one |
3203 | * to the server. In this case no error is set. | |
93a77f9e | 3204 | */ |
f63a17d6 | 3205 | int tls_choose_sigalg(SSL *s, int fatalerrs) |
93a77f9e | 3206 | { |
0972bc5c | 3207 | const SIGALG_LOOKUP *lu = NULL; |
b46867d7 | 3208 | int sig_idx = -1; |
0972bc5c | 3209 | |
555cbb32 TS |
3210 | s->s3.tmp.cert = NULL; |
3211 | s->s3.tmp.sigalg = NULL; | |
717a265a | 3212 | |
93a77f9e | 3213 | if (SSL_IS_TLS13(s)) { |
5235ef44 MC |
3214 | lu = find_sig_alg(s, NULL, NULL); |
3215 | if (lu == NULL) { | |
f63a17d6 | 3216 | if (!fatalerrs) |
717a265a | 3217 | return 1; |
c48ffbcc | 3218 | SSLfatal(s, SSL_AD_HANDSHAKE_FAILURE, |
f63a17d6 | 3219 | SSL_R_NO_SUITABLE_SIGNATURE_ALGORITHM); |
0972bc5c DSH |
3220 | return 0; |
3221 | } | |
3222 | } else { | |
7f6b466b | 3223 | /* If ciphersuite doesn't require a cert nothing to do */ |
555cbb32 | 3224 | if (!(s->s3.tmp.new_cipher->algorithm_auth & SSL_aCERT)) |
7f6b466b DSH |
3225 | return 1; |
3226 | if (!s->server && !ssl_has_cert(s, s->cert->key - s->cert->pkeys)) | |
717a265a | 3227 | return 1; |
0972bc5c DSH |
3228 | |
3229 | if (SSL_USE_SIGALGS(s)) { | |
c589c34e | 3230 | size_t i; |
555cbb32 | 3231 | if (s->s3.tmp.peer_sigalgs != NULL) { |
c2041da8 | 3232 | int curve = -1; |
599b586d DSH |
3233 | |
3234 | /* For Suite B need to match signature algorithm to curve */ | |
c2041da8 | 3235 | if (tls1_suiteb(s)) |
d8975dec RL |
3236 | curve = ssl_get_EC_curve_nid(s->cert->pkeys[SSL_PKEY_ECC] |
3237 | .privatekey); | |
0972bc5c DSH |
3238 | |
3239 | /* | |
3240 | * Find highest preference signature algorithm matching | |
3241 | * cert type | |
3242 | */ | |
29948ac8 BK |
3243 | for (i = 0; i < s->shared_sigalgslen; i++) { |
3244 | lu = s->shared_sigalgs[i]; | |
7f6b466b DSH |
3245 | |
3246 | if (s->server) { | |
b46867d7 | 3247 | if ((sig_idx = tls12_get_cert_sigalg_idx(s, lu)) == -1) |
7f6b466b | 3248 | continue; |
b46867d7 DSH |
3249 | } else { |
3250 | int cc_idx = s->cert->key - s->cert->pkeys; | |
3251 | ||
3252 | sig_idx = lu->sig_idx; | |
c589c34e BK |
3253 | if (cc_idx != sig_idx) |
3254 | continue; | |
b2021556 | 3255 | } |
c589c34e BK |
3256 | /* Check that we have a cert, and sig_algs_cert */ |
3257 | if (!has_usable_cert(s, lu, sig_idx)) | |
3258 | continue; | |
0fe3db25 NR |
3259 | if (lu->sig == EVP_PKEY_RSA_PSS) { |
3260 | /* validate that key is large enough for the signature algorithm */ | |
bcec0b94 | 3261 | EVP_PKEY *pkey = s->cert->pkeys[sig_idx].privatekey; |
0fe3db25 | 3262 | |
c5f87134 | 3263 | if (!rsa_pss_check_min_key_size(s->ctx, pkey, lu)) |
0fe3db25 NR |
3264 | continue; |
3265 | } | |
7f6b466b | 3266 | if (curve == -1 || lu->curve == curve) |
0972bc5c DSH |
3267 | break; |
3268 | } | |
db30f432 DB |
3269 | #ifndef OPENSSL_NO_GOST |
3270 | /* | |
3271 | * Some Windows-based implementations do not send GOST algorithms indication | |
3272 | * in supported_algorithms extension, so when we have GOST-based ciphersuite, | |
3273 | * we have to assume GOST support. | |
3274 | */ | |
3275 | if (i == s->shared_sigalgslen && s->s3.tmp.new_cipher->algorithm_auth & (SSL_aGOST01 | SSL_aGOST12)) { | |
3276 | if ((lu = tls1_get_legacy_sigalg(s, -1)) == NULL) { | |
3277 | if (!fatalerrs) | |
3278 | return 1; | |
3279 | SSLfatal(s, SSL_AD_HANDSHAKE_FAILURE, | |
db30f432 DB |
3280 | SSL_R_NO_SUITABLE_SIGNATURE_ALGORITHM); |
3281 | return 0; | |
3282 | } else { | |
3283 | i = 0; | |
3284 | sig_idx = lu->sig_idx; | |
3285 | } | |
3286 | } | |
3287 | #endif | |
29948ac8 | 3288 | if (i == s->shared_sigalgslen) { |
f63a17d6 | 3289 | if (!fatalerrs) |
717a265a | 3290 | return 1; |
b8fef8ee | 3291 | SSLfatal(s, SSL_AD_HANDSHAKE_FAILURE, |
b8fef8ee | 3292 | SSL_R_NO_SUITABLE_SIGNATURE_ALGORITHM); |
0972bc5c DSH |
3293 | return 0; |
3294 | } | |
3295 | } else { | |
3296 | /* | |
3297 | * If we have no sigalg use defaults | |
3298 | */ | |
3299 | const uint16_t *sent_sigs; | |
c589c34e | 3300 | size_t sent_sigslen; |
0972bc5c | 3301 | |
7f6b466b | 3302 | if ((lu = tls1_get_legacy_sigalg(s, -1)) == NULL) { |
f63a17d6 | 3303 | if (!fatalerrs) |
717a265a | 3304 | return 1; |
c48ffbcc | 3305 | SSLfatal(s, SSL_AD_INTERNAL_ERROR, |
a70535f8 | 3306 | SSL_R_NO_SUITABLE_SIGNATURE_ALGORITHM); |
0972bc5c DSH |
3307 | return 0; |
3308 | } | |
3309 | ||
3310 | /* Check signature matches a type we sent */ | |
3311 | sent_sigslen = tls12_get_psigalgs(s, 1, &sent_sigs); | |
3312 | for (i = 0; i < sent_sigslen; i++, sent_sigs++) { | |
c589c34e BK |
3313 | if (lu->sigalg == *sent_sigs |
3314 | && has_usable_cert(s, lu, lu->sig_idx)) | |
0972bc5c DSH |
3315 | break; |
3316 | } | |
3317 | if (i == sent_sigslen) { | |
f63a17d6 | 3318 | if (!fatalerrs) |
717a265a | 3319 | return 1; |
f63a17d6 | 3320 | SSLfatal(s, SSL_AD_ILLEGAL_PARAMETER, |
f63a17d6 | 3321 | SSL_R_WRONG_SIGNATURE_TYPE); |
0972bc5c DSH |
3322 | return 0; |
3323 | } | |
3324 | } | |
3325 | } else { | |
7f6b466b | 3326 | if ((lu = tls1_get_legacy_sigalg(s, -1)) == NULL) { |
f63a17d6 | 3327 | if (!fatalerrs) |
717a265a | 3328 | return 1; |
c48ffbcc | 3329 | SSLfatal(s, SSL_AD_INTERNAL_ERROR, |
a70535f8 | 3330 | SSL_R_NO_SUITABLE_SIGNATURE_ALGORITHM); |
0972bc5c DSH |
3331 | return 0; |
3332 | } | |
3333 | } | |
93a77f9e | 3334 | } |
b46867d7 DSH |
3335 | if (sig_idx == -1) |
3336 | sig_idx = lu->sig_idx; | |
555cbb32 TS |
3337 | s->s3.tmp.cert = &s->cert->pkeys[sig_idx]; |
3338 | s->cert->key = s->s3.tmp.cert; | |
3339 | s->s3.tmp.sigalg = lu; | |
93a77f9e DSH |
3340 | return 1; |
3341 | } | |
cf72c757 F |
3342 | |
3343 | int SSL_CTX_set_tlsext_max_fragment_length(SSL_CTX *ctx, uint8_t mode) | |
3344 | { | |
3345 | if (mode != TLSEXT_max_fragment_length_DISABLED | |
3346 | && !IS_MAX_FRAGMENT_LENGTH_EXT_VALID(mode)) { | |
6849b73c | 3347 | ERR_raise(ERR_LIB_SSL, SSL_R_SSL3_EXT_INVALID_MAX_FRAGMENT_LENGTH); |
cf72c757 F |
3348 | return 0; |
3349 | } | |
3350 | ||
3351 | ctx->ext.max_fragment_len_mode = mode; | |
3352 | return 1; | |
3353 | } | |
3354 | ||
3355 | int SSL_set_tlsext_max_fragment_length(SSL *ssl, uint8_t mode) | |
3356 | { | |
3357 | if (mode != TLSEXT_max_fragment_length_DISABLED | |
3358 | && !IS_MAX_FRAGMENT_LENGTH_EXT_VALID(mode)) { | |
6849b73c | 3359 | ERR_raise(ERR_LIB_SSL, SSL_R_SSL3_EXT_INVALID_MAX_FRAGMENT_LENGTH); |
cf72c757 F |
3360 | return 0; |
3361 | } | |
3362 | ||
3363 | ssl->ext.max_fragment_len_mode = mode; | |
3364 | return 1; | |
3365 | } | |
3366 | ||
3367 | uint8_t SSL_SESSION_get_max_fragment_length(const SSL_SESSION *session) | |
3368 | { | |
3369 | return session->ext.max_fragment_len_mode; | |
3370 | } | |
a76ce286 P |
3371 | |
3372 | /* | |
3373 | * Helper functions for HMAC access with legacy support included. | |
3374 | */ | |
3375 | SSL_HMAC *ssl_hmac_new(const SSL_CTX *ctx) | |
3376 | { | |
3377 | SSL_HMAC *ret = OPENSSL_zalloc(sizeof(*ret)); | |
3378 | EVP_MAC *mac = NULL; | |
3379 | ||
3380 | if (ret == NULL) | |
3381 | return NULL; | |
3382 | #ifndef OPENSSL_NO_DEPRECATED_3_0 | |
3383 | if (ctx->ext.ticket_key_evp_cb == NULL | |
3384 | && ctx->ext.ticket_key_cb != NULL) { | |
301fcb28 | 3385 | if (!ssl_hmac_old_new(ret)) |
a76ce286 P |
3386 | goto err; |
3387 | return ret; | |
3388 | } | |
3389 | #endif | |
7f80980f | 3390 | mac = EVP_MAC_fetch(ctx->libctx, "HMAC", ctx->propq); |
865adf97 | 3391 | if (mac == NULL || (ret->ctx = EVP_MAC_CTX_new(mac)) == NULL) |
a76ce286 P |
3392 | goto err; |
3393 | EVP_MAC_free(mac); | |
3394 | return ret; | |
3395 | err: | |
865adf97 | 3396 | EVP_MAC_CTX_free(ret->ctx); |
a76ce286 P |
3397 | EVP_MAC_free(mac); |
3398 | OPENSSL_free(ret); | |
3399 | return NULL; | |
3400 | } | |
3401 | ||
3402 | void ssl_hmac_free(SSL_HMAC *ctx) | |
3403 | { | |
3404 | if (ctx != NULL) { | |
865adf97 | 3405 | EVP_MAC_CTX_free(ctx->ctx); |
a76ce286 | 3406 | #ifndef OPENSSL_NO_DEPRECATED_3_0 |
301fcb28 | 3407 | ssl_hmac_old_free(ctx); |
a76ce286 P |
3408 | #endif |
3409 | OPENSSL_free(ctx); | |
3410 | } | |
3411 | } | |
3412 | ||
a76ce286 P |
3413 | EVP_MAC_CTX *ssl_hmac_get0_EVP_MAC_CTX(SSL_HMAC *ctx) |
3414 | { | |
3415 | return ctx->ctx; | |
3416 | } | |
3417 | ||
3418 | int ssl_hmac_init(SSL_HMAC *ctx, void *key, size_t len, char *md) | |
3419 | { | |
0edb8194 | 3420 | OSSL_PARAM params[2], *p = params; |
a76ce286 P |
3421 | |
3422 | if (ctx->ctx != NULL) { | |
3423 | *p++ = OSSL_PARAM_construct_utf8_string(OSSL_MAC_PARAM_DIGEST, md, 0); | |
a76ce286 | 3424 | *p = OSSL_PARAM_construct_end(); |
0edb8194 | 3425 | if (EVP_MAC_init(ctx->ctx, key, len, params)) |
a76ce286 P |
3426 | return 1; |
3427 | } | |
3428 | #ifndef OPENSSL_NO_DEPRECATED_3_0 | |
3429 | if (ctx->old_ctx != NULL) | |
301fcb28 | 3430 | return ssl_hmac_old_init(ctx, key, len, md); |
a76ce286 P |
3431 | #endif |
3432 | return 0; | |
3433 | } | |
3434 | ||
3435 | int ssl_hmac_update(SSL_HMAC *ctx, const unsigned char *data, size_t len) | |
3436 | { | |
3437 | if (ctx->ctx != NULL) | |
3438 | return EVP_MAC_update(ctx->ctx, data, len); | |
3439 | #ifndef OPENSSL_NO_DEPRECATED_3_0 | |
3440 | if (ctx->old_ctx != NULL) | |
301fcb28 | 3441 | return ssl_hmac_old_update(ctx, data, len); |
a76ce286 P |
3442 | #endif |
3443 | return 0; | |
3444 | } | |
3445 | ||
3446 | int ssl_hmac_final(SSL_HMAC *ctx, unsigned char *md, size_t *len, | |
3447 | size_t max_size) | |
3448 | { | |
3449 | if (ctx->ctx != NULL) | |
3450 | return EVP_MAC_final(ctx->ctx, md, len, max_size); | |
3451 | #ifndef OPENSSL_NO_DEPRECATED_3_0 | |
301fcb28 MC |
3452 | if (ctx->old_ctx != NULL) |
3453 | return ssl_hmac_old_final(ctx, md, len); | |
a76ce286 P |
3454 | #endif |
3455 | return 0; | |
3456 | } | |
3457 | ||
3458 | size_t ssl_hmac_size(const SSL_HMAC *ctx) | |
3459 | { | |
3460 | if (ctx->ctx != NULL) | |
90a2576b | 3461 | return EVP_MAC_CTX_get_mac_size(ctx->ctx); |
a76ce286 P |
3462 | #ifndef OPENSSL_NO_DEPRECATED_3_0 |
3463 | if (ctx->old_ctx != NULL) | |
301fcb28 | 3464 | return ssl_hmac_old_size(ctx); |
a76ce286 P |
3465 | #endif |
3466 | return 0; | |
3467 | } | |
3468 | ||
d8975dec RL |
3469 | int ssl_get_EC_curve_nid(const EVP_PKEY *pkey) |
3470 | { | |
3471 | char gname[OSSL_MAX_NAME_SIZE]; | |
3472 | ||
3473 | if (EVP_PKEY_get_group_name(pkey, gname, sizeof(gname), NULL) > 0) | |
3474 | return OBJ_txt2nid(gname); | |
3475 | ||
3476 | return NID_undef; | |
3477 | } |