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846e33c7 | 1 | /* |
3c7d0945 | 2 | * Copyright 1995-2018 The OpenSSL Project Authors. All Rights Reserved. |
f1fd4544 | 3 | * |
846e33c7 RS |
4 | * Licensed under the OpenSSL license (the "License"). You may not use |
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> | |
67c8e7f4 | 15 | #include <openssl/ocsp.h> |
5951e840 MC |
16 | #include <openssl/conf.h> |
17 | #include <openssl/x509v3.h> | |
3c27208f RS |
18 | #include <openssl/dh.h> |
19 | #include <openssl/bn.h> | |
677963e5 | 20 | #include "internal/nelem.h" |
58964a49 | 21 | #include "ssl_locl.h" |
3c27208f | 22 | #include <openssl/ct.h> |
58964a49 | 23 | |
0f113f3e MC |
24 | SSL3_ENC_METHOD const TLSv1_enc_data = { |
25 | tls1_enc, | |
26 | tls1_mac, | |
27 | tls1_setup_key_block, | |
28 | tls1_generate_master_secret, | |
29 | tls1_change_cipher_state, | |
30 | tls1_final_finish_mac, | |
0f113f3e MC |
31 | TLS_MD_CLIENT_FINISH_CONST, TLS_MD_CLIENT_FINISH_CONST_SIZE, |
32 | TLS_MD_SERVER_FINISH_CONST, TLS_MD_SERVER_FINISH_CONST_SIZE, | |
33 | tls1_alert_code, | |
34 | tls1_export_keying_material, | |
35 | 0, | |
a29fa98c | 36 | ssl3_set_handshake_header, |
2c7b4dbc | 37 | tls_close_construct_packet, |
0f113f3e MC |
38 | ssl3_handshake_write |
39 | }; | |
40 | ||
41 | SSL3_ENC_METHOD const TLSv1_1_enc_data = { | |
42 | tls1_enc, | |
43 | tls1_mac, | |
44 | tls1_setup_key_block, | |
45 | tls1_generate_master_secret, | |
46 | tls1_change_cipher_state, | |
47 | tls1_final_finish_mac, | |
0f113f3e MC |
48 | TLS_MD_CLIENT_FINISH_CONST, TLS_MD_CLIENT_FINISH_CONST_SIZE, |
49 | TLS_MD_SERVER_FINISH_CONST, TLS_MD_SERVER_FINISH_CONST_SIZE, | |
50 | tls1_alert_code, | |
51 | tls1_export_keying_material, | |
52 | SSL_ENC_FLAG_EXPLICIT_IV, | |
a29fa98c | 53 | ssl3_set_handshake_header, |
2c7b4dbc | 54 | tls_close_construct_packet, |
0f113f3e MC |
55 | ssl3_handshake_write |
56 | }; | |
57 | ||
58 | SSL3_ENC_METHOD const TLSv1_2_enc_data = { | |
59 | tls1_enc, | |
60 | tls1_mac, | |
61 | tls1_setup_key_block, | |
62 | tls1_generate_master_secret, | |
63 | tls1_change_cipher_state, | |
64 | tls1_final_finish_mac, | |
0f113f3e MC |
65 | TLS_MD_CLIENT_FINISH_CONST, TLS_MD_CLIENT_FINISH_CONST_SIZE, |
66 | TLS_MD_SERVER_FINISH_CONST, TLS_MD_SERVER_FINISH_CONST_SIZE, | |
67 | tls1_alert_code, | |
68 | tls1_export_keying_material, | |
69 | SSL_ENC_FLAG_EXPLICIT_IV | SSL_ENC_FLAG_SIGALGS | SSL_ENC_FLAG_SHA256_PRF | |
70 | | SSL_ENC_FLAG_TLS1_2_CIPHERS, | |
a29fa98c | 71 | ssl3_set_handshake_header, |
2c7b4dbc | 72 | tls_close_construct_packet, |
0f113f3e MC |
73 | ssl3_handshake_write |
74 | }; | |
58964a49 | 75 | |
582a17d6 | 76 | SSL3_ENC_METHOD const TLSv1_3_enc_data = { |
bebc0c7d | 77 | tls13_enc, |
582a17d6 | 78 | tls1_mac, |
92760c21 MC |
79 | tls13_setup_key_block, |
80 | tls13_generate_master_secret, | |
81 | tls13_change_cipher_state, | |
82 | tls13_final_finish_mac, | |
582a17d6 MC |
83 | TLS_MD_CLIENT_FINISH_CONST, TLS_MD_CLIENT_FINISH_CONST_SIZE, |
84 | TLS_MD_SERVER_FINISH_CONST, TLS_MD_SERVER_FINISH_CONST_SIZE, | |
04904312 | 85 | tls13_alert_code, |
0ca8d1ec | 86 | tls13_export_keying_material, |
bebc0c7d | 87 | SSL_ENC_FLAG_SIGALGS | SSL_ENC_FLAG_SHA256_PRF, |
582a17d6 MC |
88 | ssl3_set_handshake_header, |
89 | tls_close_construct_packet, | |
90 | ssl3_handshake_write | |
91 | }; | |
92 | ||
f3b656b2 | 93 | long tls1_default_timeout(void) |
0f113f3e MC |
94 | { |
95 | /* | |
96 | * 2 hours, the 24 hours mentioned in the TLSv1 spec is way too long for | |
97 | * http, the cache would over fill | |
98 | */ | |
99 | return (60 * 60 * 2); | |
100 | } | |
58964a49 | 101 | |
6b691a5c | 102 | int tls1_new(SSL *s) |
0f113f3e MC |
103 | { |
104 | if (!ssl3_new(s)) | |
b77f3ed1 MC |
105 | return 0; |
106 | if (!s->method->ssl_clear(s)) | |
107 | return 0; | |
108 | ||
109 | return 1; | |
0f113f3e | 110 | } |
58964a49 | 111 | |
6b691a5c | 112 | void tls1_free(SSL *s) |
0f113f3e | 113 | { |
aff8c126 | 114 | OPENSSL_free(s->ext.session_ticket); |
0f113f3e MC |
115 | ssl3_free(s); |
116 | } | |
58964a49 | 117 | |
b77f3ed1 | 118 | int tls1_clear(SSL *s) |
0f113f3e | 119 | { |
b77f3ed1 MC |
120 | if (!ssl3_clear(s)) |
121 | return 0; | |
122 | ||
4fa52141 VD |
123 | if (s->method->version == TLS_ANY_VERSION) |
124 | s->version = TLS_MAX_VERSION; | |
125 | else | |
126 | s->version = s->method->version; | |
b77f3ed1 MC |
127 | |
128 | return 1; | |
0f113f3e | 129 | } |
58964a49 | 130 | |
525de5d3 | 131 | #ifndef OPENSSL_NO_EC |
eda3766b | 132 | |
2dc1aeed DSH |
133 | /* |
134 | * Table of curve information. | |
ddb4c047 | 135 | * Do not delete entries or reorder this array! It is used as a lookup |
2dc1aeed DSH |
136 | * table: the index of each entry is one less than the TLS curve id. |
137 | */ | |
0e464d9d | 138 | static const TLS_GROUP_INFO nid_list[] = { |
0f113f3e MC |
139 | {NID_sect163k1, 80, TLS_CURVE_CHAR2}, /* sect163k1 (1) */ |
140 | {NID_sect163r1, 80, TLS_CURVE_CHAR2}, /* sect163r1 (2) */ | |
141 | {NID_sect163r2, 80, TLS_CURVE_CHAR2}, /* sect163r2 (3) */ | |
142 | {NID_sect193r1, 80, TLS_CURVE_CHAR2}, /* sect193r1 (4) */ | |
143 | {NID_sect193r2, 80, TLS_CURVE_CHAR2}, /* sect193r2 (5) */ | |
144 | {NID_sect233k1, 112, TLS_CURVE_CHAR2}, /* sect233k1 (6) */ | |
145 | {NID_sect233r1, 112, TLS_CURVE_CHAR2}, /* sect233r1 (7) */ | |
146 | {NID_sect239k1, 112, TLS_CURVE_CHAR2}, /* sect239k1 (8) */ | |
147 | {NID_sect283k1, 128, TLS_CURVE_CHAR2}, /* sect283k1 (9) */ | |
148 | {NID_sect283r1, 128, TLS_CURVE_CHAR2}, /* sect283r1 (10) */ | |
149 | {NID_sect409k1, 192, TLS_CURVE_CHAR2}, /* sect409k1 (11) */ | |
150 | {NID_sect409r1, 192, TLS_CURVE_CHAR2}, /* sect409r1 (12) */ | |
151 | {NID_sect571k1, 256, TLS_CURVE_CHAR2}, /* sect571k1 (13) */ | |
152 | {NID_sect571r1, 256, TLS_CURVE_CHAR2}, /* sect571r1 (14) */ | |
153 | {NID_secp160k1, 80, TLS_CURVE_PRIME}, /* secp160k1 (15) */ | |
154 | {NID_secp160r1, 80, TLS_CURVE_PRIME}, /* secp160r1 (16) */ | |
155 | {NID_secp160r2, 80, TLS_CURVE_PRIME}, /* secp160r2 (17) */ | |
156 | {NID_secp192k1, 80, TLS_CURVE_PRIME}, /* secp192k1 (18) */ | |
157 | {NID_X9_62_prime192v1, 80, TLS_CURVE_PRIME}, /* secp192r1 (19) */ | |
158 | {NID_secp224k1, 112, TLS_CURVE_PRIME}, /* secp224k1 (20) */ | |
159 | {NID_secp224r1, 112, TLS_CURVE_PRIME}, /* secp224r1 (21) */ | |
160 | {NID_secp256k1, 128, TLS_CURVE_PRIME}, /* secp256k1 (22) */ | |
161 | {NID_X9_62_prime256v1, 128, TLS_CURVE_PRIME}, /* secp256r1 (23) */ | |
162 | {NID_secp384r1, 192, TLS_CURVE_PRIME}, /* secp384r1 (24) */ | |
163 | {NID_secp521r1, 256, TLS_CURVE_PRIME}, /* secp521r1 (25) */ | |
164 | {NID_brainpoolP256r1, 128, TLS_CURVE_PRIME}, /* brainpoolP256r1 (26) */ | |
165 | {NID_brainpoolP384r1, 192, TLS_CURVE_PRIME}, /* brainpoolP384r1 (27) */ | |
166 | {NID_brainpoolP512r1, 256, TLS_CURVE_PRIME}, /* brainpool512r1 (28) */ | |
d2916a5b | 167 | {EVP_PKEY_X25519, 128, TLS_CURVE_CUSTOM}, /* X25519 (29) */ |
0e1d6ecf | 168 | {EVP_PKEY_X448, 224, TLS_CURVE_CUSTOM}, /* X448 (30) */ |
0f113f3e MC |
169 | }; |
170 | ||
171 | static const unsigned char ecformats_default[] = { | |
172 | TLSEXT_ECPOINTFORMAT_uncompressed, | |
173 | TLSEXT_ECPOINTFORMAT_ansiX962_compressed_prime, | |
174 | TLSEXT_ECPOINTFORMAT_ansiX962_compressed_char2 | |
175 | }; | |
176 | ||
fe6ef247 | 177 | /* The default curves */ |
9e84a42d DSH |
178 | static const uint16_t eccurves_default[] = { |
179 | 29, /* X25519 (29) */ | |
180 | 23, /* secp256r1 (23) */ | |
0e1d6ecf | 181 | 30, /* X448 (30) */ |
9e84a42d DSH |
182 | 25, /* secp521r1 (25) */ |
183 | 24, /* secp384r1 (24) */ | |
de57d237 EK |
184 | }; |
185 | ||
9e84a42d DSH |
186 | static const uint16_t suiteb_curves[] = { |
187 | TLSEXT_curve_P_256, | |
188 | TLSEXT_curve_P_384 | |
0f113f3e | 189 | }; |
2ea80354 | 190 | |
f48d826e | 191 | const TLS_GROUP_INFO *tls1_group_id_lookup(uint16_t group_id) |
0f113f3e MC |
192 | { |
193 | /* ECC curves from RFC 4492 and RFC 7027 */ | |
f48d826e | 194 | if (group_id < 1 || group_id > OSSL_NELEM(nid_list)) |
43b95d73 | 195 | return NULL; |
f48d826e | 196 | return &nid_list[group_id - 1]; |
0f113f3e | 197 | } |
525de5d3 | 198 | |
4a1b4280 | 199 | static uint16_t tls1_nid2group_id(int nid) |
0f113f3e | 200 | { |
2fa2d15a DSH |
201 | size_t i; |
202 | for (i = 0; i < OSSL_NELEM(nid_list); i++) { | |
203 | if (nid_list[i].nid == nid) | |
3a63c0ed | 204 | return (uint16_t)(i + 1); |
0f113f3e | 205 | } |
2fa2d15a | 206 | return 0; |
0f113f3e MC |
207 | } |
208 | ||
740580c2 | 209 | /* |
ff6d20a6 DSH |
210 | * Set *pgroups to the supported groups list and *pgroupslen to |
211 | * the number of groups supported. | |
fd2b65ce | 212 | */ |
ff6d20a6 DSH |
213 | void tls1_get_supported_groups(SSL *s, const uint16_t **pgroups, |
214 | size_t *pgroupslen) | |
0f113f3e | 215 | { |
3e373518 | 216 | |
34e5292c DSH |
217 | /* For Suite B mode only include P-256, P-384 */ |
218 | switch (tls1_suiteb(s)) { | |
219 | case SSL_CERT_FLAG_SUITEB_128_LOS: | |
ff6d20a6 DSH |
220 | *pgroups = suiteb_curves; |
221 | *pgroupslen = OSSL_NELEM(suiteb_curves); | |
34e5292c DSH |
222 | break; |
223 | ||
224 | case SSL_CERT_FLAG_SUITEB_128_LOS_ONLY: | |
ff6d20a6 DSH |
225 | *pgroups = suiteb_curves; |
226 | *pgroupslen = 1; | |
34e5292c DSH |
227 | break; |
228 | ||
229 | case SSL_CERT_FLAG_SUITEB_192_LOS: | |
ff6d20a6 DSH |
230 | *pgroups = suiteb_curves + 1; |
231 | *pgroupslen = 1; | |
34e5292c DSH |
232 | break; |
233 | ||
234 | default: | |
235 | if (s->ext.supportedgroups == NULL) { | |
ff6d20a6 DSH |
236 | *pgroups = eccurves_default; |
237 | *pgroupslen = OSSL_NELEM(eccurves_default); | |
34e5292c | 238 | } else { |
ff6d20a6 DSH |
239 | *pgroups = s->ext.supportedgroups; |
240 | *pgroupslen = s->ext.supportedgroups_len; | |
0f113f3e | 241 | } |
34e5292c | 242 | break; |
0f113f3e | 243 | } |
0f113f3e | 244 | } |
b362ccab DSH |
245 | |
246 | /* See if curve is allowed by security callback */ | |
9e84a42d | 247 | int tls_curve_allowed(SSL *s, uint16_t curve, int op) |
0f113f3e | 248 | { |
5ce5f787 | 249 | const TLS_GROUP_INFO *cinfo = tls1_group_id_lookup(curve); |
9e84a42d | 250 | unsigned char ctmp[2]; |
5ce5f787 DSH |
251 | |
252 | if (cinfo == NULL) | |
0f113f3e | 253 | return 0; |
0f113f3e MC |
254 | # ifdef OPENSSL_NO_EC2M |
255 | if (cinfo->flags & TLS_CURVE_CHAR2) | |
256 | return 0; | |
257 | # endif | |
9e84a42d DSH |
258 | ctmp[0] = curve >> 8; |
259 | ctmp[1] = curve & 0xff; | |
260 | return ssl_security(s, op, cinfo->secbits, cinfo->nid, (void *)ctmp); | |
0f113f3e | 261 | } |
b362ccab | 262 | |
b50951d3 DSH |
263 | /* Return 1 if "id" is in "list" */ |
264 | static int tls1_in_list(uint16_t id, const uint16_t *list, size_t listlen) | |
265 | { | |
266 | size_t i; | |
267 | for (i = 0; i < listlen; i++) | |
268 | if (list[i] == id) | |
269 | return 1; | |
270 | return 0; | |
271 | } | |
272 | ||
1d97c843 | 273 | /*- |
8841154a | 274 | * For nmatch >= 0, return the id of the |nmatch|th shared group or 0 |
6977e8ee KR |
275 | * if there is no match. |
276 | * For nmatch == -1, return number of matches | |
8841154a | 277 | * For nmatch == -2, return the id of the group to use for |
b50951d3 | 278 | * a tmp key, or 0 if there is no match. |
d0595f17 | 279 | */ |
8841154a | 280 | uint16_t tls1_shared_group(SSL *s, int nmatch) |
0f113f3e | 281 | { |
9e84a42d | 282 | const uint16_t *pref, *supp; |
b50951d3 | 283 | size_t num_pref, num_supp, i; |
0f113f3e | 284 | int k; |
3e373518 | 285 | |
0f113f3e MC |
286 | /* Can't do anything on client side */ |
287 | if (s->server == 0) | |
8841154a | 288 | return 0; |
0f113f3e MC |
289 | if (nmatch == -2) { |
290 | if (tls1_suiteb(s)) { | |
291 | /* | |
292 | * For Suite B ciphersuite determines curve: we already know | |
293 | * these are acceptable due to previous checks. | |
294 | */ | |
295 | unsigned long cid = s->s3->tmp.new_cipher->id; | |
3e373518 | 296 | |
0f113f3e | 297 | if (cid == TLS1_CK_ECDHE_ECDSA_WITH_AES_128_GCM_SHA256) |
8841154a | 298 | return TLSEXT_curve_P_256; |
0f113f3e | 299 | if (cid == TLS1_CK_ECDHE_ECDSA_WITH_AES_256_GCM_SHA384) |
8841154a | 300 | return TLSEXT_curve_P_384; |
0f113f3e | 301 | /* Should never happen */ |
8841154a | 302 | return 0; |
0f113f3e MC |
303 | } |
304 | /* If not Suite B just return first preference shared curve */ | |
305 | nmatch = 0; | |
306 | } | |
307 | /* | |
ff6d20a6 DSH |
308 | * If server preference set, our groups are the preference order |
309 | * otherwise peer decides. | |
0f113f3e | 310 | */ |
ff6d20a6 DSH |
311 | if (s->options & SSL_OP_CIPHER_SERVER_PREFERENCE) { |
312 | tls1_get_supported_groups(s, &pref, &num_pref); | |
313 | tls1_get_peer_groups(s, &supp, &num_supp); | |
314 | } else { | |
315 | tls1_get_peer_groups(s, &pref, &num_pref); | |
316 | tls1_get_supported_groups(s, &supp, &num_supp); | |
317 | } | |
3c06513f | 318 | |
9e84a42d DSH |
319 | for (k = 0, i = 0; i < num_pref; i++) { |
320 | uint16_t id = pref[i]; | |
3e373518 | 321 | |
b50951d3 DSH |
322 | if (!tls1_in_list(id, supp, num_supp) |
323 | || !tls_curve_allowed(s, id, SSL_SECOP_CURVE_SHARED)) | |
0f113f3e | 324 | continue; |
b50951d3 DSH |
325 | if (nmatch == k) |
326 | return id; | |
327 | k++; | |
0f113f3e MC |
328 | } |
329 | if (nmatch == -1) | |
330 | return k; | |
331 | /* Out of range (nmatch > k). */ | |
8841154a | 332 | return 0; |
0f113f3e | 333 | } |
d0595f17 | 334 | |
9e84a42d | 335 | int tls1_set_groups(uint16_t **pext, size_t *pextlen, |
de4d764e | 336 | int *groups, size_t ngroups) |
0f113f3e | 337 | { |
9e84a42d | 338 | uint16_t *glist; |
0f113f3e MC |
339 | size_t i; |
340 | /* | |
de4d764e | 341 | * Bitmap of groups included to detect duplicates: only works while group |
0f113f3e MC |
342 | * ids < 32 |
343 | */ | |
344 | unsigned long dup_list = 0; | |
cdb10bae | 345 | |
efd67e01 MC |
346 | if (ngroups == 0) { |
347 | SSLerr(SSL_F_TLS1_SET_GROUPS, SSL_R_BAD_LENGTH); | |
348 | return 0; | |
349 | } | |
cdb10bae RS |
350 | if ((glist = OPENSSL_malloc(ngroups * sizeof(*glist))) == NULL) { |
351 | SSLerr(SSL_F_TLS1_SET_GROUPS, ERR_R_MALLOC_FAILURE); | |
0f113f3e | 352 | return 0; |
cdb10bae | 353 | } |
9e84a42d | 354 | for (i = 0; i < ngroups; i++) { |
0f113f3e | 355 | unsigned long idmask; |
9e84a42d | 356 | uint16_t id; |
de4d764e | 357 | /* TODO(TLS1.3): Convert for DH groups */ |
4a1b4280 | 358 | id = tls1_nid2group_id(groups[i]); |
0f113f3e MC |
359 | idmask = 1L << id; |
360 | if (!id || (dup_list & idmask)) { | |
de4d764e | 361 | OPENSSL_free(glist); |
0f113f3e MC |
362 | return 0; |
363 | } | |
364 | dup_list |= idmask; | |
9e84a42d | 365 | glist[i] = id; |
0f113f3e | 366 | } |
b548a1f1 | 367 | OPENSSL_free(*pext); |
de4d764e | 368 | *pext = glist; |
9e84a42d | 369 | *pextlen = ngroups; |
0f113f3e MC |
370 | return 1; |
371 | } | |
372 | ||
ca50cd91 | 373 | # define MAX_CURVELIST OSSL_NELEM(nid_list) |
0f113f3e MC |
374 | |
375 | typedef struct { | |
376 | size_t nidcnt; | |
377 | int nid_arr[MAX_CURVELIST]; | |
378 | } nid_cb_st; | |
d0595f17 DSH |
379 | |
380 | static int nid_cb(const char *elem, int len, void *arg) | |
0f113f3e MC |
381 | { |
382 | nid_cb_st *narg = arg; | |
383 | size_t i; | |
384 | int nid; | |
385 | char etmp[20]; | |
2747d73c KR |
386 | if (elem == NULL) |
387 | return 0; | |
0f113f3e MC |
388 | if (narg->nidcnt == MAX_CURVELIST) |
389 | return 0; | |
390 | if (len > (int)(sizeof(etmp) - 1)) | |
391 | return 0; | |
392 | memcpy(etmp, elem, len); | |
393 | etmp[len] = 0; | |
394 | nid = EC_curve_nist2nid(etmp); | |
395 | if (nid == NID_undef) | |
396 | nid = OBJ_sn2nid(etmp); | |
397 | if (nid == NID_undef) | |
398 | nid = OBJ_ln2nid(etmp); | |
399 | if (nid == NID_undef) | |
400 | return 0; | |
401 | for (i = 0; i < narg->nidcnt; i++) | |
402 | if (narg->nid_arr[i] == nid) | |
403 | return 0; | |
404 | narg->nid_arr[narg->nidcnt++] = nid; | |
405 | return 1; | |
406 | } | |
407 | ||
de4d764e | 408 | /* Set groups based on a colon separate list */ |
9e84a42d | 409 | int tls1_set_groups_list(uint16_t **pext, size_t *pextlen, const char *str) |
0f113f3e MC |
410 | { |
411 | nid_cb_st ncb; | |
412 | ncb.nidcnt = 0; | |
413 | if (!CONF_parse_list(str, ':', 1, nid_cb, &ncb)) | |
414 | return 0; | |
415 | if (pext == NULL) | |
416 | return 1; | |
de4d764e | 417 | return tls1_set_groups(pext, pextlen, ncb.nid_arr, ncb.nidcnt); |
0f113f3e | 418 | } |
4a1b4280 DSH |
419 | /* Return group id of a key */ |
420 | static uint16_t tls1_get_group_id(EVP_PKEY *pkey) | |
0f113f3e | 421 | { |
4a1b4280 | 422 | EC_KEY *ec = EVP_PKEY_get0_EC_KEY(pkey); |
0f113f3e | 423 | const EC_GROUP *grp; |
4a1b4280 DSH |
424 | |
425 | if (ec == NULL) | |
0f113f3e | 426 | return 0; |
0f113f3e | 427 | grp = EC_KEY_get0_group(ec); |
4a1b4280 | 428 | return tls1_nid2group_id(EC_GROUP_get_curve_name(grp)); |
0f113f3e MC |
429 | } |
430 | ||
4a1b4280 DSH |
431 | /* Check a key is compatible with compression extension */ |
432 | static int tls1_check_pkey_comp(SSL *s, EVP_PKEY *pkey) | |
0f113f3e | 433 | { |
4a1b4280 DSH |
434 | const EC_KEY *ec; |
435 | const EC_GROUP *grp; | |
436 | unsigned char comp_id; | |
437 | size_t i; | |
438 | ||
439 | /* If not an EC key nothing to check */ | |
440 | if (EVP_PKEY_id(pkey) != EVP_PKEY_EC) | |
441 | return 1; | |
442 | ec = EVP_PKEY_get0_EC_KEY(pkey); | |
443 | grp = EC_KEY_get0_group(ec); | |
444 | ||
445 | /* Get required compression id */ | |
446 | if (EC_KEY_get_conv_form(ec) == POINT_CONVERSION_UNCOMPRESSED) { | |
447 | comp_id = TLSEXT_ECPOINTFORMAT_uncompressed; | |
448 | } else if (SSL_IS_TLS13(s)) { | |
7500bc33 MC |
449 | /* |
450 | * ec_point_formats extension is not used in TLSv1.3 so we ignore | |
451 | * this check. | |
452 | */ | |
453 | return 1; | |
4a1b4280 DSH |
454 | } else { |
455 | int field_type = EC_METHOD_get_field_type(EC_GROUP_method_of(grp)); | |
456 | ||
457 | if (field_type == NID_X9_62_prime_field) | |
458 | comp_id = TLSEXT_ECPOINTFORMAT_ansiX962_compressed_prime; | |
b2555168 | 459 | else if (field_type == NID_X9_62_characteristic_two_field) |
4a1b4280 DSH |
460 | comp_id = TLSEXT_ECPOINTFORMAT_ansiX962_compressed_char2; |
461 | else | |
462 | return 0; | |
463 | } | |
0f113f3e MC |
464 | /* |
465 | * If point formats extension present check it, otherwise everything is | |
466 | * supported (see RFC4492). | |
467 | */ | |
4a1b4280 | 468 | if (s->session->ext.ecpointformats == NULL) |
0f113f3e | 469 | return 1; |
4a1b4280 DSH |
470 | |
471 | for (i = 0; i < s->session->ext.ecpointformats_len; i++) { | |
472 | if (s->session->ext.ecpointformats[i] == comp_id) | |
473 | return 1; | |
474 | } | |
475 | return 0; | |
476 | } | |
b50951d3 | 477 | |
4a1b4280 | 478 | /* Check a group id matches preferences */ |
dcf8b01f | 479 | int tls1_check_group_id(SSL *s, uint16_t group_id, int check_own_groups) |
4a1b4280 DSH |
480 | { |
481 | const uint16_t *groups; | |
b50951d3 | 482 | size_t groups_len; |
4a1b4280 DSH |
483 | |
484 | if (group_id == 0) | |
485 | return 0; | |
486 | ||
6447e818 DSH |
487 | /* Check for Suite B compliance */ |
488 | if (tls1_suiteb(s) && s->s3->tmp.new_cipher != NULL) { | |
489 | unsigned long cid = s->s3->tmp.new_cipher->id; | |
490 | ||
491 | if (cid == TLS1_CK_ECDHE_ECDSA_WITH_AES_128_GCM_SHA256) { | |
492 | if (group_id != TLSEXT_curve_P_256) | |
493 | return 0; | |
494 | } else if (cid == TLS1_CK_ECDHE_ECDSA_WITH_AES_256_GCM_SHA384) { | |
495 | if (group_id != TLSEXT_curve_P_384) | |
496 | return 0; | |
497 | } else { | |
498 | /* Should never happen */ | |
499 | return 0; | |
500 | } | |
501 | } | |
b50951d3 | 502 | |
dcf8b01f MC |
503 | if (check_own_groups) { |
504 | /* Check group is one of our preferences */ | |
505 | tls1_get_supported_groups(s, &groups, &groups_len); | |
506 | if (!tls1_in_list(group_id, groups, groups_len)) | |
507 | return 0; | |
508 | } | |
4a1b4280 | 509 | |
6447e818 DSH |
510 | if (!tls_curve_allowed(s, group_id, SSL_SECOP_CURVE_CHECK)) |
511 | return 0; | |
512 | ||
4a1b4280 DSH |
513 | /* For clients, nothing more to check */ |
514 | if (!s->server) | |
515 | return 1; | |
516 | ||
517 | /* Check group is one of peers preferences */ | |
ff6d20a6 | 518 | tls1_get_peer_groups(s, &groups, &groups_len); |
4a1b4280 DSH |
519 | |
520 | /* | |
521 | * RFC 4492 does not require the supported elliptic curves extension | |
522 | * so if it is not sent we can just choose any curve. | |
523 | * It is invalid to send an empty list in the supported groups | |
524 | * extension, so groups_len == 0 always means no extension. | |
525 | */ | |
526 | if (groups_len == 0) | |
527 | return 1; | |
b50951d3 | 528 | return tls1_in_list(group_id, groups, groups_len); |
0f113f3e | 529 | } |
d61ff83b | 530 | |
7da160b0 MC |
531 | void tls1_get_formatlist(SSL *s, const unsigned char **pformats, |
532 | size_t *num_formats) | |
0f113f3e MC |
533 | { |
534 | /* | |
535 | * If we have a custom point format list use it otherwise use default | |
536 | */ | |
aff8c126 RS |
537 | if (s->ext.ecpointformats) { |
538 | *pformats = s->ext.ecpointformats; | |
539 | *num_formats = s->ext.ecpointformats_len; | |
0f113f3e MC |
540 | } else { |
541 | *pformats = ecformats_default; | |
542 | /* For Suite B we don't support char2 fields */ | |
543 | if (tls1_suiteb(s)) | |
544 | *num_formats = sizeof(ecformats_default) - 1; | |
545 | else | |
546 | *num_formats = sizeof(ecformats_default); | |
547 | } | |
548 | } | |
549 | ||
550 | /* | |
551 | * Check cert parameters compatible with extensions: currently just checks EC | |
552 | * certificates have compatible curves and compression. | |
d61ff83b | 553 | */ |
9195ddcd | 554 | static int tls1_check_cert_param(SSL *s, X509 *x, int check_ee_md) |
0f113f3e | 555 | { |
4a1b4280 | 556 | uint16_t group_id; |
0f113f3e | 557 | EVP_PKEY *pkey; |
8382fd3a | 558 | pkey = X509_get0_pubkey(x); |
4a1b4280 | 559 | if (pkey == NULL) |
0f113f3e MC |
560 | return 0; |
561 | /* If not EC nothing to do */ | |
3aeb9348 | 562 | if (EVP_PKEY_id(pkey) != EVP_PKEY_EC) |
0f113f3e | 563 | return 1; |
4a1b4280 DSH |
564 | /* Check compression */ |
565 | if (!tls1_check_pkey_comp(s, pkey)) | |
0f113f3e | 566 | return 0; |
4a1b4280 | 567 | group_id = tls1_get_group_id(pkey); |
dcf8b01f MC |
568 | /* |
569 | * For a server we allow the certificate to not be in our list of supported | |
570 | * groups. | |
571 | */ | |
572 | if (!tls1_check_group_id(s, group_id, !s->server)) | |
0f113f3e MC |
573 | return 0; |
574 | /* | |
575 | * Special case for suite B. We *MUST* sign using SHA256+P-256 or | |
9195ddcd | 576 | * SHA384+P-384. |
0f113f3e | 577 | */ |
9195ddcd | 578 | if (check_ee_md && tls1_suiteb(s)) { |
0f113f3e MC |
579 | int check_md; |
580 | size_t i; | |
581 | CERT *c = s->cert; | |
9e84a42d | 582 | |
0f113f3e | 583 | /* Check to see we have necessary signing algorithm */ |
4a1b4280 | 584 | if (group_id == TLSEXT_curve_P_256) |
0f113f3e | 585 | check_md = NID_ecdsa_with_SHA256; |
4a1b4280 | 586 | else if (group_id == TLSEXT_curve_P_384) |
0f113f3e MC |
587 | check_md = NID_ecdsa_with_SHA384; |
588 | else | |
589 | return 0; /* Should never happen */ | |
4a1b4280 | 590 | for (i = 0; i < c->shared_sigalgslen; i++) { |
4d43ee28 | 591 | if (check_md == c->shared_sigalgs[i]->sigandhash) |
4a1b4280 DSH |
592 | return 1;; |
593 | } | |
594 | return 0; | |
0f113f3e | 595 | } |
4a1b4280 | 596 | return 1; |
0f113f3e MC |
597 | } |
598 | ||
6977e8ee | 599 | /* |
8483a003 | 600 | * tls1_check_ec_tmp_key - Check EC temporary key compatibility |
6977e8ee KR |
601 | * @s: SSL connection |
602 | * @cid: Cipher ID we're considering using | |
603 | * | |
604 | * Checks that the kECDHE cipher suite we're considering using | |
605 | * is compatible with the client extensions. | |
606 | * | |
607 | * Returns 0 when the cipher can't be used or 1 when it can. | |
608 | */ | |
2ea80354 | 609 | int tls1_check_ec_tmp_key(SSL *s, unsigned long cid) |
0f113f3e | 610 | { |
4a1b4280 DSH |
611 | /* If not Suite B just need a shared group */ |
612 | if (!tls1_suiteb(s)) | |
613 | return tls1_shared_group(s, 0) != 0; | |
0f113f3e MC |
614 | /* |
615 | * If Suite B, AES128 MUST use P-256 and AES256 MUST use P-384, no other | |
616 | * curves permitted. | |
617 | */ | |
4a1b4280 | 618 | if (cid == TLS1_CK_ECDHE_ECDSA_WITH_AES_128_GCM_SHA256) |
dcf8b01f | 619 | return tls1_check_group_id(s, TLSEXT_curve_P_256, 1); |
4a1b4280 | 620 | if (cid == TLS1_CK_ECDHE_ECDSA_WITH_AES_256_GCM_SHA384) |
dcf8b01f | 621 | return tls1_check_group_id(s, TLSEXT_curve_P_384, 1); |
4a1b4280 DSH |
622 | |
623 | return 0; | |
0f113f3e | 624 | } |
d0595f17 | 625 | |
14536c8c DSH |
626 | #else |
627 | ||
628 | static int tls1_check_cert_param(SSL *s, X509 *x, int set_ee_md) | |
0f113f3e MC |
629 | { |
630 | return 1; | |
631 | } | |
14536c8c | 632 | |
0f113f3e | 633 | #endif /* OPENSSL_NO_EC */ |
f1fd4544 | 634 | |
703bcee0 | 635 | /* Default sigalg schemes */ |
98c792d1 | 636 | static const uint16_t tls12_sigalgs[] = { |
703bcee0 MC |
637 | #ifndef OPENSSL_NO_EC |
638 | TLSEXT_SIGALG_ecdsa_secp256r1_sha256, | |
639 | TLSEXT_SIGALG_ecdsa_secp384r1_sha384, | |
640 | TLSEXT_SIGALG_ecdsa_secp521r1_sha512, | |
3d234c9e | 641 | TLSEXT_SIGALG_ed25519, |
0e1d6ecf | 642 | TLSEXT_SIGALG_ed448, |
e481f9b9 | 643 | #endif |
0f113f3e | 644 | |
f55e99f7 BK |
645 | TLSEXT_SIGALG_rsa_pss_pss_sha256, |
646 | TLSEXT_SIGALG_rsa_pss_pss_sha384, | |
647 | TLSEXT_SIGALG_rsa_pss_pss_sha512, | |
648 | TLSEXT_SIGALG_rsa_pss_rsae_sha256, | |
649 | TLSEXT_SIGALG_rsa_pss_rsae_sha384, | |
650 | TLSEXT_SIGALG_rsa_pss_rsae_sha512, | |
536199ec | 651 | |
703bcee0 MC |
652 | TLSEXT_SIGALG_rsa_pkcs1_sha256, |
653 | TLSEXT_SIGALG_rsa_pkcs1_sha384, | |
654 | TLSEXT_SIGALG_rsa_pkcs1_sha512, | |
0f113f3e | 655 | |
5eeb6c6e | 656 | #ifndef OPENSSL_NO_EC |
d8311fc9 | 657 | TLSEXT_SIGALG_ecdsa_sha224, |
42ab2230 | 658 | TLSEXT_SIGALG_ecdsa_sha1, |
5eeb6c6e | 659 | #endif |
d8311fc9 | 660 | TLSEXT_SIGALG_rsa_pkcs1_sha224, |
42ab2230 | 661 | TLSEXT_SIGALG_rsa_pkcs1_sha1, |
5eeb6c6e | 662 | #ifndef OPENSSL_NO_DSA |
d8311fc9 | 663 | TLSEXT_SIGALG_dsa_sha224, |
42ab2230 MC |
664 | TLSEXT_SIGALG_dsa_sha1, |
665 | ||
703bcee0 MC |
666 | TLSEXT_SIGALG_dsa_sha256, |
667 | TLSEXT_SIGALG_dsa_sha384, | |
41f10305 DB |
668 | TLSEXT_SIGALG_dsa_sha512, |
669 | #endif | |
670 | #ifndef OPENSSL_NO_GOST | |
671 | TLSEXT_SIGALG_gostr34102012_256_gostr34112012_256, | |
672 | TLSEXT_SIGALG_gostr34102012_512_gostr34112012_512, | |
673 | TLSEXT_SIGALG_gostr34102001_gostr3411, | |
5eeb6c6e | 674 | #endif |
fc101f88 | 675 | }; |
0f113f3e | 676 | |
e481f9b9 | 677 | #ifndef OPENSSL_NO_EC |
98c792d1 | 678 | static const uint16_t suiteb_sigalgs[] = { |
703bcee0 MC |
679 | TLSEXT_SIGALG_ecdsa_secp256r1_sha256, |
680 | TLSEXT_SIGALG_ecdsa_secp384r1_sha384 | |
2ea80354 | 681 | }; |
e481f9b9 | 682 | #endif |
aff8c126 | 683 | |
7a531ee4 | 684 | static const SIGALG_LOOKUP sigalg_lookup_tbl[] = { |
5eeb6c6e | 685 | #ifndef OPENSSL_NO_EC |
edbfba1a | 686 | {"ecdsa_secp256r1_sha256", TLSEXT_SIGALG_ecdsa_secp256r1_sha256, |
17ae384e DSH |
687 | NID_sha256, SSL_MD_SHA256_IDX, EVP_PKEY_EC, SSL_PKEY_ECC, |
688 | NID_ecdsa_with_SHA256, NID_X9_62_prime256v1}, | |
edbfba1a | 689 | {"ecdsa_secp384r1_sha384", TLSEXT_SIGALG_ecdsa_secp384r1_sha384, |
17ae384e DSH |
690 | NID_sha384, SSL_MD_SHA384_IDX, EVP_PKEY_EC, SSL_PKEY_ECC, |
691 | NID_ecdsa_with_SHA384, NID_secp384r1}, | |
edbfba1a | 692 | {"ecdsa_secp521r1_sha512", TLSEXT_SIGALG_ecdsa_secp521r1_sha512, |
17ae384e DSH |
693 | NID_sha512, SSL_MD_SHA512_IDX, EVP_PKEY_EC, SSL_PKEY_ECC, |
694 | NID_ecdsa_with_SHA512, NID_secp521r1}, | |
b04d4e38 | 695 | {"ed25519", TLSEXT_SIGALG_ed25519, |
d2916a5b | 696 | NID_undef, -1, EVP_PKEY_ED25519, SSL_PKEY_ED25519, |
b04d4e38 | 697 | NID_undef, NID_undef}, |
0e1d6ecf MC |
698 | {"ed448", TLSEXT_SIGALG_ed448, |
699 | NID_undef, -1, EVP_PKEY_ED448, SSL_PKEY_ED448, | |
700 | NID_undef, NID_undef}, | |
d8311fc9 MC |
701 | {NULL, TLSEXT_SIGALG_ecdsa_sha224, |
702 | NID_sha224, SSL_MD_SHA224_IDX, EVP_PKEY_EC, SSL_PKEY_ECC, | |
703 | NID_ecdsa_with_SHA224, NID_undef}, | |
edbfba1a | 704 | {NULL, TLSEXT_SIGALG_ecdsa_sha1, |
17ae384e DSH |
705 | NID_sha1, SSL_MD_SHA1_IDX, EVP_PKEY_EC, SSL_PKEY_ECC, |
706 | NID_ecdsa_with_SHA1, NID_undef}, | |
5eeb6c6e | 707 | #endif |
f55e99f7 BK |
708 | {"rsa_pss_rsae_sha256", TLSEXT_SIGALG_rsa_pss_rsae_sha256, |
709 | NID_sha256, SSL_MD_SHA256_IDX, EVP_PKEY_RSA_PSS, SSL_PKEY_RSA, | |
710 | NID_undef, NID_undef}, | |
711 | {"rsa_pss_rsae_sha384", TLSEXT_SIGALG_rsa_pss_rsae_sha384, | |
712 | NID_sha384, SSL_MD_SHA384_IDX, EVP_PKEY_RSA_PSS, SSL_PKEY_RSA, | |
713 | NID_undef, NID_undef}, | |
714 | {"rsa_pss_rsae_sha512", TLSEXT_SIGALG_rsa_pss_rsae_sha512, | |
715 | NID_sha512, SSL_MD_SHA512_IDX, EVP_PKEY_RSA_PSS, SSL_PKEY_RSA, | |
716 | NID_undef, NID_undef}, | |
717 | {"rsa_pss_pss_sha256", TLSEXT_SIGALG_rsa_pss_pss_sha256, | |
17ae384e DSH |
718 | NID_sha256, SSL_MD_SHA256_IDX, EVP_PKEY_RSA_PSS, SSL_PKEY_RSA_PSS_SIGN, |
719 | NID_undef, NID_undef}, | |
f55e99f7 | 720 | {"rsa_pss_pss_sha384", TLSEXT_SIGALG_rsa_pss_pss_sha384, |
17ae384e DSH |
721 | NID_sha384, SSL_MD_SHA384_IDX, EVP_PKEY_RSA_PSS, SSL_PKEY_RSA_PSS_SIGN, |
722 | NID_undef, NID_undef}, | |
f55e99f7 | 723 | {"rsa_pss_pss_sha512", TLSEXT_SIGALG_rsa_pss_pss_sha512, |
17ae384e DSH |
724 | NID_sha512, SSL_MD_SHA512_IDX, EVP_PKEY_RSA_PSS, SSL_PKEY_RSA_PSS_SIGN, |
725 | NID_undef, NID_undef}, | |
edbfba1a | 726 | {"rsa_pkcs1_sha256", TLSEXT_SIGALG_rsa_pkcs1_sha256, |
d0ff28f8 | 727 | NID_sha256, SSL_MD_SHA256_IDX, EVP_PKEY_RSA, SSL_PKEY_RSA, |
17ae384e | 728 | NID_sha256WithRSAEncryption, NID_undef}, |
edbfba1a | 729 | {"rsa_pkcs1_sha384", TLSEXT_SIGALG_rsa_pkcs1_sha384, |
d0ff28f8 | 730 | NID_sha384, SSL_MD_SHA384_IDX, EVP_PKEY_RSA, SSL_PKEY_RSA, |
17ae384e | 731 | NID_sha384WithRSAEncryption, NID_undef}, |
edbfba1a | 732 | {"rsa_pkcs1_sha512", TLSEXT_SIGALG_rsa_pkcs1_sha512, |
d0ff28f8 | 733 | NID_sha512, SSL_MD_SHA512_IDX, EVP_PKEY_RSA, SSL_PKEY_RSA, |
17ae384e | 734 | NID_sha512WithRSAEncryption, NID_undef}, |
d8311fc9 MC |
735 | {"rsa_pkcs1_sha224", TLSEXT_SIGALG_rsa_pkcs1_sha224, |
736 | NID_sha224, SSL_MD_SHA224_IDX, EVP_PKEY_RSA, SSL_PKEY_RSA, | |
737 | NID_sha224WithRSAEncryption, NID_undef}, | |
edbfba1a | 738 | {"rsa_pkcs1_sha1", TLSEXT_SIGALG_rsa_pkcs1_sha1, |
d0ff28f8 | 739 | NID_sha1, SSL_MD_SHA1_IDX, EVP_PKEY_RSA, SSL_PKEY_RSA, |
17ae384e | 740 | NID_sha1WithRSAEncryption, NID_undef}, |
5eeb6c6e | 741 | #ifndef OPENSSL_NO_DSA |
edbfba1a | 742 | {NULL, TLSEXT_SIGALG_dsa_sha256, |
17ae384e DSH |
743 | NID_sha256, SSL_MD_SHA256_IDX, EVP_PKEY_DSA, SSL_PKEY_DSA_SIGN, |
744 | NID_dsa_with_SHA256, NID_undef}, | |
edbfba1a | 745 | {NULL, TLSEXT_SIGALG_dsa_sha384, |
17ae384e DSH |
746 | NID_sha384, SSL_MD_SHA384_IDX, EVP_PKEY_DSA, SSL_PKEY_DSA_SIGN, |
747 | NID_undef, NID_undef}, | |
edbfba1a | 748 | {NULL, TLSEXT_SIGALG_dsa_sha512, |
17ae384e DSH |
749 | NID_sha512, SSL_MD_SHA512_IDX, EVP_PKEY_DSA, SSL_PKEY_DSA_SIGN, |
750 | NID_undef, NID_undef}, | |
d8311fc9 MC |
751 | {NULL, TLSEXT_SIGALG_dsa_sha224, |
752 | NID_sha224, SSL_MD_SHA224_IDX, EVP_PKEY_DSA, SSL_PKEY_DSA_SIGN, | |
753 | NID_undef, NID_undef}, | |
edbfba1a | 754 | {NULL, TLSEXT_SIGALG_dsa_sha1, |
17ae384e DSH |
755 | NID_sha1, SSL_MD_SHA1_IDX, EVP_PKEY_DSA, SSL_PKEY_DSA_SIGN, |
756 | NID_dsaWithSHA1, NID_undef}, | |
5eeb6c6e MC |
757 | #endif |
758 | #ifndef OPENSSL_NO_GOST | |
edbfba1a | 759 | {NULL, TLSEXT_SIGALG_gostr34102012_256_gostr34112012_256, |
17ae384e DSH |
760 | NID_id_GostR3411_2012_256, SSL_MD_GOST12_256_IDX, |
761 | NID_id_GostR3410_2012_256, SSL_PKEY_GOST12_256, | |
762 | NID_undef, NID_undef}, | |
edbfba1a | 763 | {NULL, TLSEXT_SIGALG_gostr34102012_512_gostr34112012_512, |
17ae384e DSH |
764 | NID_id_GostR3411_2012_512, SSL_MD_GOST12_512_IDX, |
765 | NID_id_GostR3410_2012_512, SSL_PKEY_GOST12_512, | |
766 | NID_undef, NID_undef}, | |
edbfba1a | 767 | {NULL, TLSEXT_SIGALG_gostr34102001_gostr3411, |
17ae384e DSH |
768 | NID_id_GostR3411_94, SSL_MD_GOST94_IDX, |
769 | NID_id_GostR3410_2001, SSL_PKEY_GOST01, | |
770 | NID_undef, NID_undef} | |
5eeb6c6e | 771 | #endif |
703bcee0 | 772 | }; |
0972bc5c DSH |
773 | /* Legacy sigalgs for TLS < 1.2 RSA TLS signatures */ |
774 | static const SIGALG_LOOKUP legacy_rsa_sigalg = { | |
775 | "rsa_pkcs1_md5_sha1", 0, | |
776 | NID_md5_sha1, SSL_MD_MD5_SHA1_IDX, | |
777 | EVP_PKEY_RSA, SSL_PKEY_RSA, | |
778 | NID_undef, NID_undef | |
779 | }; | |
780 | ||
781 | /* | |
782 | * Default signature algorithm values used if signature algorithms not present. | |
783 | * From RFC5246. Note: order must match certificate index order. | |
784 | */ | |
785 | static const uint16_t tls_default_sigalg[] = { | |
786 | TLSEXT_SIGALG_rsa_pkcs1_sha1, /* SSL_PKEY_RSA */ | |
045d078a | 787 | 0, /* SSL_PKEY_RSA_PSS_SIGN */ |
0972bc5c DSH |
788 | TLSEXT_SIGALG_dsa_sha1, /* SSL_PKEY_DSA_SIGN */ |
789 | TLSEXT_SIGALG_ecdsa_sha1, /* SSL_PKEY_ECC */ | |
790 | TLSEXT_SIGALG_gostr34102001_gostr3411, /* SSL_PKEY_GOST01 */ | |
791 | TLSEXT_SIGALG_gostr34102012_256_gostr34112012_256, /* SSL_PKEY_GOST12_256 */ | |
07afa3d8 | 792 | TLSEXT_SIGALG_gostr34102012_512_gostr34112012_512, /* SSL_PKEY_GOST12_512 */ |
0e1d6ecf MC |
793 | 0, /* SSL_PKEY_ED25519 */ |
794 | 0, /* SSL_PKEY_ED448 */ | |
0972bc5c | 795 | }; |
703bcee0 | 796 | |
4d43ee28 DSH |
797 | /* Lookup TLS signature algorithm */ |
798 | static const SIGALG_LOOKUP *tls1_lookup_sigalg(uint16_t sigalg) | |
703bcee0 MC |
799 | { |
800 | size_t i; | |
4d43ee28 | 801 | const SIGALG_LOOKUP *s; |
703bcee0 | 802 | |
4d43ee28 DSH |
803 | for (i = 0, s = sigalg_lookup_tbl; i < OSSL_NELEM(sigalg_lookup_tbl); |
804 | i++, s++) { | |
805 | if (s->sigalg == sigalg) | |
806 | return s; | |
703bcee0 | 807 | } |
4d43ee28 DSH |
808 | return NULL; |
809 | } | |
168067b6 DSH |
810 | /* Lookup hash: return 0 if invalid or not enabled */ |
811 | int tls1_lookup_md(const SIGALG_LOOKUP *lu, const EVP_MD **pmd) | |
812 | { | |
813 | const EVP_MD *md; | |
814 | if (lu == NULL) | |
815 | return 0; | |
816 | /* lu->hash == NID_undef means no associated digest */ | |
817 | if (lu->hash == NID_undef) { | |
818 | md = NULL; | |
819 | } else { | |
820 | md = ssl_md(lu->hash_idx); | |
821 | if (md == NULL) | |
822 | return 0; | |
823 | } | |
824 | if (pmd) | |
825 | *pmd = md; | |
826 | return 1; | |
827 | } | |
828 | ||
0fe3db25 NR |
829 | /* |
830 | * Check if key is large enough to generate RSA-PSS signature. | |
831 | * | |
832 | * The key must greater than or equal to 2 * hash length + 2. | |
833 | * SHA512 has a hash length of 64 bytes, which is incompatible | |
834 | * with a 128 byte (1024 bit) key. | |
835 | */ | |
836 | #define RSA_PSS_MINIMUM_KEY_SIZE(md) (2 * EVP_MD_size(md) + 2) | |
837 | static int rsa_pss_check_min_key_size(const RSA *rsa, const SIGALG_LOOKUP *lu) | |
838 | { | |
839 | const EVP_MD *md; | |
840 | ||
841 | if (rsa == NULL) | |
842 | return 0; | |
843 | if (!tls1_lookup_md(lu, &md) || md == NULL) | |
844 | return 0; | |
845 | if (RSA_size(rsa) < RSA_PSS_MINIMUM_KEY_SIZE(md)) | |
846 | return 0; | |
847 | return 1; | |
848 | } | |
849 | ||
0972bc5c DSH |
850 | /* |
851 | * Return a signature algorithm for TLS < 1.2 where the signature type | |
852 | * is fixed by the certificate type. | |
853 | */ | |
854 | static const SIGALG_LOOKUP *tls1_get_legacy_sigalg(const SSL *s, int idx) | |
855 | { | |
7f6b466b DSH |
856 | if (idx == -1) { |
857 | if (s->server) { | |
858 | size_t i; | |
859 | ||
860 | /* Work out index corresponding to ciphersuite */ | |
861 | for (i = 0; i < SSL_PKEY_NUM; i++) { | |
862 | const SSL_CERT_LOOKUP *clu = ssl_cert_lookup_by_idx(i); | |
863 | ||
864 | if (clu->amask & s->s3->tmp.new_cipher->algorithm_auth) { | |
865 | idx = i; | |
866 | break; | |
867 | } | |
868 | } | |
1f65c045 DB |
869 | |
870 | /* | |
871 | * Some GOST ciphersuites allow more than one signature algorithms | |
872 | * */ | |
873 | if (idx == SSL_PKEY_GOST01 && s->s3->tmp.new_cipher->algorithm_auth != SSL_aGOST01) { | |
874 | int real_idx; | |
875 | ||
876 | for (real_idx = SSL_PKEY_GOST12_512; real_idx >= SSL_PKEY_GOST01; | |
877 | real_idx--) { | |
878 | if (s->cert->pkeys[real_idx].privatekey != NULL) { | |
879 | idx = real_idx; | |
880 | break; | |
881 | } | |
882 | } | |
883 | } | |
7f6b466b DSH |
884 | } else { |
885 | idx = s->cert->key - s->cert->pkeys; | |
886 | } | |
887 | } | |
0972bc5c DSH |
888 | if (idx < 0 || idx >= (int)OSSL_NELEM(tls_default_sigalg)) |
889 | return NULL; | |
890 | if (SSL_USE_SIGALGS(s) || idx != SSL_PKEY_RSA) { | |
891 | const SIGALG_LOOKUP *lu = tls1_lookup_sigalg(tls_default_sigalg[idx]); | |
892 | ||
168067b6 | 893 | if (!tls1_lookup_md(lu, NULL)) |
0972bc5c | 894 | return NULL; |
0972bc5c DSH |
895 | return lu; |
896 | } | |
897 | return &legacy_rsa_sigalg; | |
898 | } | |
899 | /* Set peer sigalg based key type */ | |
900 | int tls1_set_peer_legacy_sigalg(SSL *s, const EVP_PKEY *pkey) | |
901 | { | |
52fd27f9 DSH |
902 | size_t idx; |
903 | const SIGALG_LOOKUP *lu; | |
0972bc5c | 904 | |
52fd27f9 DSH |
905 | if (ssl_cert_lookup_by_pkey(pkey, &idx) == NULL) |
906 | return 0; | |
907 | lu = tls1_get_legacy_sigalg(s, idx); | |
0972bc5c DSH |
908 | if (lu == NULL) |
909 | return 0; | |
910 | s->s3->tmp.peer_sigalg = lu; | |
911 | return 1; | |
912 | } | |
703bcee0 | 913 | |
98c792d1 | 914 | size_t tls12_get_psigalgs(SSL *s, int sent, const uint16_t **psigs) |
0f113f3e MC |
915 | { |
916 | /* | |
917 | * If Suite B mode use Suite B sigalgs only, ignore any other | |
918 | * preferences. | |
919 | */ | |
e481f9b9 | 920 | #ifndef OPENSSL_NO_EC |
0f113f3e MC |
921 | switch (tls1_suiteb(s)) { |
922 | case SSL_CERT_FLAG_SUITEB_128_LOS: | |
923 | *psigs = suiteb_sigalgs; | |
7a531ee4 | 924 | return OSSL_NELEM(suiteb_sigalgs); |
0f113f3e MC |
925 | |
926 | case SSL_CERT_FLAG_SUITEB_128_LOS_ONLY: | |
927 | *psigs = suiteb_sigalgs; | |
7a531ee4 | 928 | return 1; |
0f113f3e MC |
929 | |
930 | case SSL_CERT_FLAG_SUITEB_192_LOS: | |
7a531ee4 MC |
931 | *psigs = suiteb_sigalgs + 1; |
932 | return 1; | |
0f113f3e | 933 | } |
e481f9b9 | 934 | #endif |
a9669ddc DSH |
935 | /* |
936 | * We use client_sigalgs (if not NULL) if we're a server | |
937 | * and sending a certificate request or if we're a client and | |
938 | * determining which shared algorithm to use. | |
939 | */ | |
940 | if ((s->server == sent) && s->cert->client_sigalgs != NULL) { | |
0f113f3e MC |
941 | *psigs = s->cert->client_sigalgs; |
942 | return s->cert->client_sigalgslen; | |
943 | } else if (s->cert->conf_sigalgs) { | |
944 | *psigs = s->cert->conf_sigalgs; | |
945 | return s->cert->conf_sigalgslen; | |
946 | } else { | |
947 | *psigs = tls12_sigalgs; | |
703bcee0 | 948 | return OSSL_NELEM(tls12_sigalgs); |
0f113f3e MC |
949 | } |
950 | } | |
951 | ||
6f54ae7a MC |
952 | /* |
953 | * Called by servers only. Checks that we have a sig alg that supports the | |
954 | * specified EC curve. | |
955 | */ | |
956 | int tls_check_sigalg_curve(const SSL *s, int curve) | |
957 | { | |
958 | const uint16_t *sigs; | |
959 | size_t siglen, i; | |
960 | ||
961 | if (s->cert->conf_sigalgs) { | |
962 | sigs = s->cert->conf_sigalgs; | |
963 | siglen = s->cert->conf_sigalgslen; | |
964 | } else { | |
965 | sigs = tls12_sigalgs; | |
966 | siglen = OSSL_NELEM(tls12_sigalgs); | |
967 | } | |
968 | ||
969 | for (i = 0; i < siglen; i++) { | |
970 | const SIGALG_LOOKUP *lu = tls1_lookup_sigalg(sigs[i]); | |
971 | ||
972 | if (lu == NULL) | |
973 | continue; | |
974 | if (lu->sig == EVP_PKEY_EC | |
975 | && lu->curve != NID_undef | |
976 | && curve == lu->curve) | |
977 | return 1; | |
978 | } | |
979 | ||
980 | return 0; | |
981 | } | |
982 | ||
0f113f3e MC |
983 | /* |
984 | * Check signature algorithm is consistent with sent supported signature | |
b2eb6998 DSH |
985 | * algorithms and if so set relevant digest and signature scheme in |
986 | * s. | |
ec4a50b3 | 987 | */ |
f742cda8 | 988 | int tls12_check_peer_sigalg(SSL *s, uint16_t sig, EVP_PKEY *pkey) |
0f113f3e | 989 | { |
98c792d1 | 990 | const uint16_t *sent_sigs; |
5554facb | 991 | const EVP_MD *md = NULL; |
703bcee0 | 992 | char sigalgstr[2]; |
11d2641f | 993 | size_t sent_sigslen, i, cidx; |
536199ec | 994 | int pkeyid = EVP_PKEY_id(pkey); |
f742cda8 | 995 | const SIGALG_LOOKUP *lu; |
4d43ee28 | 996 | |
0f113f3e | 997 | /* Should never happen */ |
536199ec | 998 | if (pkeyid == -1) |
0f113f3e | 999 | return -1; |
5a8916d9 DSH |
1000 | if (SSL_IS_TLS13(s)) { |
1001 | /* Disallow DSA for TLS 1.3 */ | |
1002 | if (pkeyid == EVP_PKEY_DSA) { | |
f63a17d6 MC |
1003 | SSLfatal(s, SSL_AD_ILLEGAL_PARAMETER, SSL_F_TLS12_CHECK_PEER_SIGALG, |
1004 | SSL_R_WRONG_SIGNATURE_TYPE); | |
5a8916d9 DSH |
1005 | return 0; |
1006 | } | |
1007 | /* Only allow PSS for TLS 1.3 */ | |
1008 | if (pkeyid == EVP_PKEY_RSA) | |
1009 | pkeyid = EVP_PKEY_RSA_PSS; | |
1010 | } | |
f742cda8 DSH |
1011 | lu = tls1_lookup_sigalg(sig); |
1012 | /* | |
d8311fc9 MC |
1013 | * Check sigalgs is known. Disallow SHA1/SHA224 with TLS 1.3. Check key type |
1014 | * is consistent with signature: RSA keys can be used for RSA-PSS | |
f742cda8 | 1015 | */ |
d8311fc9 MC |
1016 | if (lu == NULL |
1017 | || (SSL_IS_TLS13(s) && (lu->hash == NID_sha1 || lu->hash == NID_sha224)) | |
095a982b | 1018 | || (pkeyid != lu->sig |
f742cda8 | 1019 | && (lu->sig != EVP_PKEY_RSA_PSS || pkeyid != EVP_PKEY_RSA))) { |
f63a17d6 MC |
1020 | SSLfatal(s, SSL_AD_ILLEGAL_PARAMETER, SSL_F_TLS12_CHECK_PEER_SIGALG, |
1021 | SSL_R_WRONG_SIGNATURE_TYPE); | |
0f113f3e MC |
1022 | return 0; |
1023 | } | |
11d2641f MC |
1024 | /* Check the sigalg is consistent with the key OID */ |
1025 | if (!ssl_cert_lookup_by_nid(EVP_PKEY_id(pkey), &cidx) | |
1026 | || lu->sig_idx != (int)cidx) { | |
1027 | SSLfatal(s, SSL_AD_ILLEGAL_PARAMETER, SSL_F_TLS12_CHECK_PEER_SIGALG, | |
1028 | SSL_R_WRONG_SIGNATURE_TYPE); | |
1029 | return 0; | |
1030 | } | |
1031 | ||
e481f9b9 | 1032 | #ifndef OPENSSL_NO_EC |
fe3066ee | 1033 | if (pkeyid == EVP_PKEY_EC) { |
44b6318f | 1034 | |
4a1b4280 DSH |
1035 | /* Check point compression is permitted */ |
1036 | if (!tls1_check_pkey_comp(s, pkey)) { | |
f63a17d6 MC |
1037 | SSLfatal(s, SSL_AD_ILLEGAL_PARAMETER, |
1038 | SSL_F_TLS12_CHECK_PEER_SIGALG, | |
1039 | SSL_R_ILLEGAL_POINT_COMPRESSION); | |
4a1b4280 DSH |
1040 | return 0; |
1041 | } | |
1042 | ||
1043 | /* For TLS 1.3 or Suite B check curve matches signature algorithm */ | |
1044 | if (SSL_IS_TLS13(s) || tls1_suiteb(s)) { | |
1045 | EC_KEY *ec = EVP_PKEY_get0_EC_KEY(pkey); | |
1046 | int curve = EC_GROUP_get_curve_name(EC_KEY_get0_group(ec)); | |
1047 | ||
a34a9df0 | 1048 | if (lu->curve != NID_undef && curve != lu->curve) { |
f63a17d6 MC |
1049 | SSLfatal(s, SSL_AD_ILLEGAL_PARAMETER, |
1050 | SSL_F_TLS12_CHECK_PEER_SIGALG, SSL_R_WRONG_CURVE); | |
8f88cb53 DSH |
1051 | return 0; |
1052 | } | |
4a1b4280 DSH |
1053 | } |
1054 | if (!SSL_IS_TLS13(s)) { | |
1055 | /* Check curve matches extensions */ | |
dcf8b01f | 1056 | if (!tls1_check_group_id(s, tls1_get_group_id(pkey), 1)) { |
f63a17d6 MC |
1057 | SSLfatal(s, SSL_AD_ILLEGAL_PARAMETER, |
1058 | SSL_F_TLS12_CHECK_PEER_SIGALG, SSL_R_WRONG_CURVE); | |
8f88cb53 DSH |
1059 | return 0; |
1060 | } | |
8f88cb53 | 1061 | if (tls1_suiteb(s)) { |
f1adb006 DSH |
1062 | /* Check sigalg matches a permissible Suite B value */ |
1063 | if (sig != TLSEXT_SIGALG_ecdsa_secp256r1_sha256 | |
1064 | && sig != TLSEXT_SIGALG_ecdsa_secp384r1_sha384) { | |
f63a17d6 MC |
1065 | SSLfatal(s, SSL_AD_HANDSHAKE_FAILURE, |
1066 | SSL_F_TLS12_CHECK_PEER_SIGALG, | |
1067 | SSL_R_WRONG_SIGNATURE_TYPE); | |
0f113f3e | 1068 | return 0; |
f1adb006 | 1069 | } |
8f88cb53 | 1070 | } |
0f113f3e | 1071 | } |
8f88cb53 | 1072 | } else if (tls1_suiteb(s)) { |
f63a17d6 MC |
1073 | SSLfatal(s, SSL_AD_HANDSHAKE_FAILURE, SSL_F_TLS12_CHECK_PEER_SIGALG, |
1074 | SSL_R_WRONG_SIGNATURE_TYPE); | |
0f113f3e | 1075 | return 0; |
8f88cb53 | 1076 | } |
e481f9b9 | 1077 | #endif |
0f113f3e MC |
1078 | |
1079 | /* Check signature matches a type we sent */ | |
a9669ddc | 1080 | sent_sigslen = tls12_get_psigalgs(s, 1, &sent_sigs); |
536199ec | 1081 | for (i = 0; i < sent_sigslen; i++, sent_sigs++) { |
703bcee0 | 1082 | if (sig == *sent_sigs) |
0f113f3e MC |
1083 | break; |
1084 | } | |
1085 | /* Allow fallback to SHA1 if not strict mode */ | |
f742cda8 DSH |
1086 | if (i == sent_sigslen && (lu->hash != NID_sha1 |
1087 | || s->cert->cert_flags & SSL_CERT_FLAGS_CHECK_TLS_STRICT)) { | |
f63a17d6 MC |
1088 | SSLfatal(s, SSL_AD_HANDSHAKE_FAILURE, SSL_F_TLS12_CHECK_PEER_SIGALG, |
1089 | SSL_R_WRONG_SIGNATURE_TYPE); | |
0f113f3e MC |
1090 | return 0; |
1091 | } | |
168067b6 | 1092 | if (!tls1_lookup_md(lu, &md)) { |
f63a17d6 MC |
1093 | SSLfatal(s, SSL_AD_HANDSHAKE_FAILURE, SSL_F_TLS12_CHECK_PEER_SIGALG, |
1094 | SSL_R_UNKNOWN_DIGEST); | |
1095 | return 0; | |
0f113f3e | 1096 | } |
168067b6 DSH |
1097 | if (md != NULL) { |
1098 | /* | |
1099 | * Make sure security callback allows algorithm. For historical | |
1100 | * reasons we have to pass the sigalg as a two byte char array. | |
1101 | */ | |
1102 | sigalgstr[0] = (sig >> 8) & 0xff; | |
1103 | sigalgstr[1] = sig & 0xff; | |
1104 | if (!ssl_security(s, SSL_SECOP_SIGALG_CHECK, | |
1105 | EVP_MD_size(md) * 4, EVP_MD_type(md), | |
1106 | (void *)sigalgstr)) { | |
f63a17d6 MC |
1107 | SSLfatal(s, SSL_AD_HANDSHAKE_FAILURE, SSL_F_TLS12_CHECK_PEER_SIGALG, |
1108 | SSL_R_WRONG_SIGNATURE_TYPE); | |
168067b6 DSH |
1109 | return 0; |
1110 | } | |
0f113f3e | 1111 | } |
6cbebb55 | 1112 | /* Store the sigalg the peer uses */ |
f742cda8 | 1113 | s->s3->tmp.peer_sigalg = lu; |
0f113f3e MC |
1114 | return 1; |
1115 | } | |
2ea80354 | 1116 | |
42ef7aea DSH |
1117 | int SSL_get_peer_signature_type_nid(const SSL *s, int *pnid) |
1118 | { | |
f742cda8 | 1119 | if (s->s3->tmp.peer_sigalg == NULL) |
42ef7aea | 1120 | return 0; |
f742cda8 | 1121 | *pnid = s->s3->tmp.peer_sigalg->sig; |
42ef7aea DSH |
1122 | return 1; |
1123 | } | |
1124 | ||
45f24725 VD |
1125 | int SSL_get_signature_type_nid(const SSL *s, int *pnid) |
1126 | { | |
1127 | if (s->s3->tmp.sigalg == NULL) | |
1128 | return 0; | |
1129 | *pnid = s->s3->tmp.sigalg->sig; | |
1130 | return 1; | |
1131 | } | |
1132 | ||
0f113f3e | 1133 | /* |
3eb2aff4 KR |
1134 | * Set a mask of disabled algorithms: an algorithm is disabled if it isn't |
1135 | * supported, doesn't appear in supported signature algorithms, isn't supported | |
1136 | * by the enabled protocol versions or by the security level. | |
1137 | * | |
1138 | * This function should only be used for checking which ciphers are supported | |
1139 | * by the client. | |
1140 | * | |
1141 | * Call ssl_cipher_disabled() to check that it's enabled or not. | |
b7bfe69b | 1142 | */ |
1d0c08b4 | 1143 | int ssl_set_client_disabled(SSL *s) |
0f113f3e | 1144 | { |
4d69f9e6 DSH |
1145 | s->s3->tmp.mask_a = 0; |
1146 | s->s3->tmp.mask_k = 0; | |
4d69f9e6 | 1147 | ssl_set_sig_mask(&s->s3->tmp.mask_a, s, SSL_SECOP_SIGALG_MASK); |
1d0c08b4 | 1148 | if (ssl_get_min_max_version(s, &s->s3->tmp.min_ver, |
b5b993b2 | 1149 | &s->s3->tmp.max_ver, NULL) != 0) |
1d0c08b4 | 1150 | return 0; |
a230b26e | 1151 | #ifndef OPENSSL_NO_PSK |
0f113f3e MC |
1152 | /* with PSK there must be client callback set */ |
1153 | if (!s->psk_client_callback) { | |
4d69f9e6 | 1154 | s->s3->tmp.mask_a |= SSL_aPSK; |
fe5eef3a | 1155 | s->s3->tmp.mask_k |= SSL_PSK; |
0f113f3e | 1156 | } |
a230b26e | 1157 | #endif /* OPENSSL_NO_PSK */ |
e481f9b9 | 1158 | #ifndef OPENSSL_NO_SRP |
0f113f3e | 1159 | if (!(s->srp_ctx.srp_Mask & SSL_kSRP)) { |
4d69f9e6 DSH |
1160 | s->s3->tmp.mask_a |= SSL_aSRP; |
1161 | s->s3->tmp.mask_k |= SSL_kSRP; | |
0f113f3e | 1162 | } |
e481f9b9 | 1163 | #endif |
1d0c08b4 | 1164 | return 1; |
0f113f3e | 1165 | } |
fc101f88 | 1166 | |
3eb2aff4 KR |
1167 | /* |
1168 | * ssl_cipher_disabled - check that a cipher is disabled or not | |
1169 | * @s: SSL connection that you want to use the cipher on | |
1170 | * @c: cipher to check | |
1171 | * @op: Security check that you want to do | |
8af91fd9 | 1172 | * @ecdhe: If set to 1 then TLSv1 ECDHE ciphers are also allowed in SSLv3 |
3eb2aff4 KR |
1173 | * |
1174 | * Returns 1 when it's disabled, 0 when enabled. | |
1175 | */ | |
8af91fd9 | 1176 | int ssl_cipher_disabled(SSL *s, const SSL_CIPHER *c, int op, int ecdhe) |
0f113f3e | 1177 | { |
3eb2aff4 | 1178 | if (c->algorithm_mkey & s->s3->tmp.mask_k |
4d69f9e6 | 1179 | || c->algorithm_auth & s->s3->tmp.mask_a) |
0f113f3e | 1180 | return 1; |
3eb2aff4 KR |
1181 | if (s->s3->tmp.max_ver == 0) |
1182 | return 1; | |
8af91fd9 MC |
1183 | if (!SSL_IS_DTLS(s)) { |
1184 | int min_tls = c->min_tls; | |
1185 | ||
1186 | /* | |
1187 | * For historical reasons we will allow ECHDE to be selected by a server | |
1188 | * in SSLv3 if we are a client | |
1189 | */ | |
1190 | if (min_tls == TLS1_VERSION && ecdhe | |
1191 | && (c->algorithm_mkey & (SSL_kECDHE | SSL_kECDHEPSK)) != 0) | |
1192 | min_tls = SSL3_VERSION; | |
1193 | ||
1194 | if ((min_tls > s->s3->tmp.max_ver) || (c->max_tls < s->s3->tmp.min_ver)) | |
1195 | return 1; | |
1196 | } | |
3eb2aff4 | 1197 | if (SSL_IS_DTLS(s) && (DTLS_VERSION_GT(c->min_dtls, s->s3->tmp.max_ver) |
a230b26e | 1198 | || DTLS_VERSION_LT(c->max_dtls, s->s3->tmp.min_ver))) |
3eb2aff4 KR |
1199 | return 1; |
1200 | ||
0f113f3e MC |
1201 | return !ssl_security(s, op, c->strength_bits, 0, (void *)c); |
1202 | } | |
b362ccab | 1203 | |
7da160b0 | 1204 | int tls_use_ticket(SSL *s) |
0f113f3e | 1205 | { |
08191294 | 1206 | if ((s->options & SSL_OP_NO_TICKET)) |
0f113f3e MC |
1207 | return 0; |
1208 | return ssl_security(s, SSL_SECOP_TICKET, 0, 0, NULL); | |
1209 | } | |
ed3883d2 | 1210 | |
e469af8d | 1211 | int tls1_set_server_sigalgs(SSL *s) |
0f113f3e | 1212 | { |
0f113f3e | 1213 | size_t i; |
8483a003 F |
1214 | |
1215 | /* Clear any shared signature algorithms */ | |
b548a1f1 RS |
1216 | OPENSSL_free(s->cert->shared_sigalgs); |
1217 | s->cert->shared_sigalgs = NULL; | |
1218 | s->cert->shared_sigalgslen = 0; | |
9195ddcd DSH |
1219 | /* Clear certificate validity flags */ |
1220 | for (i = 0; i < SSL_PKEY_NUM; i++) | |
6383d316 | 1221 | s->s3->tmp.valid_flags[i] = 0; |
a8bb912d DSH |
1222 | /* |
1223 | * If peer sent no signature algorithms check to see if we support | |
1224 | * the default algorithm for each certificate type | |
1225 | */ | |
c589c34e BK |
1226 | if (s->s3->tmp.peer_cert_sigalgs == NULL |
1227 | && s->s3->tmp.peer_sigalgs == NULL) { | |
a8bb912d DSH |
1228 | const uint16_t *sent_sigs; |
1229 | size_t sent_sigslen = tls12_get_psigalgs(s, 1, &sent_sigs); | |
0f113f3e | 1230 | |
a8bb912d DSH |
1231 | for (i = 0; i < SSL_PKEY_NUM; i++) { |
1232 | const SIGALG_LOOKUP *lu = tls1_get_legacy_sigalg(s, i); | |
1233 | size_t j; | |
1234 | ||
1235 | if (lu == NULL) | |
1236 | continue; | |
1237 | /* Check default matches a type we sent */ | |
1238 | for (j = 0; j < sent_sigslen; j++) { | |
1239 | if (lu->sigalg == sent_sigs[j]) { | |
1240 | s->s3->tmp.valid_flags[i] = CERT_PKEY_SIGN; | |
1241 | break; | |
1242 | } | |
1243 | } | |
1244 | } | |
9195ddcd | 1245 | return 1; |
a8bb912d | 1246 | } |
9195ddcd DSH |
1247 | |
1248 | if (!tls1_process_sigalgs(s)) { | |
f63a17d6 MC |
1249 | SSLfatal(s, SSL_AD_INTERNAL_ERROR, |
1250 | SSL_F_TLS1_SET_SERVER_SIGALGS, ERR_R_INTERNAL_ERROR); | |
1251 | return 0; | |
d376e57d | 1252 | } |
9195ddcd DSH |
1253 | if (s->cert->shared_sigalgs != NULL) |
1254 | return 1; | |
f63a17d6 | 1255 | |
fb34a0f4 | 1256 | /* Fatal error if no shared signature algorithms */ |
f63a17d6 MC |
1257 | SSLfatal(s, SSL_AD_HANDSHAKE_FAILURE, SSL_F_TLS1_SET_SERVER_SIGALGS, |
1258 | SSL_R_NO_SHARED_SIGNATURE_ALGORITHMS); | |
0f113f3e MC |
1259 | return 0; |
1260 | } | |
e469af8d | 1261 | |
1d97c843 | 1262 | /*- |
1ab3836b | 1263 | * Gets the ticket information supplied by the client if any. |
e7f0d921 | 1264 | * |
1ab3836b | 1265 | * hello: The parsed ClientHello data |
c519e89f BM |
1266 | * ret: (output) on return, if a ticket was decrypted, then this is set to |
1267 | * point to the resulting session. | |
6434abbf | 1268 | */ |
61fb5923 | 1269 | SSL_TICKET_STATUS tls_get_ticket_from_client(SSL *s, CLIENTHELLO_MSG *hello, |
df0fed9a | 1270 | SSL_SESSION **ret) |
0f113f3e | 1271 | { |
1ab3836b MC |
1272 | size_t size; |
1273 | RAW_EXTENSION *ticketext; | |
e7f0d921 | 1274 | |
0f113f3e | 1275 | *ret = NULL; |
aff8c126 | 1276 | s->ext.ticket_expected = 0; |
0f113f3e MC |
1277 | |
1278 | /* | |
9362c93e MC |
1279 | * If tickets disabled or not supported by the protocol version |
1280 | * (e.g. TLSv1.3) behave as if no ticket present to permit stateful | |
0f113f3e MC |
1281 | * resumption. |
1282 | */ | |
1ab3836b | 1283 | if (s->version <= SSL3_VERSION || !tls_use_ticket(s)) |
df0fed9a | 1284 | return SSL_TICKET_NONE; |
9ceb2426 | 1285 | |
70af3d8e MC |
1286 | ticketext = &hello->pre_proc_exts[TLSEXT_IDX_session_ticket]; |
1287 | if (!ticketext->present) | |
df0fed9a | 1288 | return SSL_TICKET_NONE; |
1ab3836b MC |
1289 | |
1290 | size = PACKET_remaining(&ticketext->data); | |
70af3d8e | 1291 | |
c0638ade | 1292 | return tls_decrypt_ticket(s, PACKET_data(&ticketext->data), size, |
70af3d8e | 1293 | hello->session_id, hello->session_id_len, ret); |
1ab3836b MC |
1294 | } |
1295 | ||
1d97c843 TH |
1296 | /*- |
1297 | * tls_decrypt_ticket attempts to decrypt a session ticket. | |
c519e89f | 1298 | * |
61fb5923 MC |
1299 | * If s->tls_session_secret_cb is set and we're not doing TLSv1.3 then we are |
1300 | * expecting a pre-shared key ciphersuite, in which case we have no use for | |
1301 | * session tickets and one will never be decrypted, nor will | |
1302 | * s->ext.ticket_expected be set to 1. | |
1303 | * | |
1304 | * Side effects: | |
1305 | * Sets s->ext.ticket_expected to 1 if the server will have to issue | |
1306 | * a new session ticket to the client because the client indicated support | |
1307 | * (and s->tls_session_secret_cb is NULL) but the client either doesn't have | |
1308 | * a session ticket or we couldn't use the one it gave us, or if | |
1309 | * s->ctx->ext.ticket_key_cb asked to renew the client's ticket. | |
1310 | * Otherwise, s->ext.ticket_expected is set to 0. | |
1311 | * | |
c519e89f | 1312 | * etick: points to the body of the session ticket extension. |
8483a003 | 1313 | * eticklen: the length of the session tickets extension. |
c519e89f BM |
1314 | * sess_id: points at the session ID. |
1315 | * sesslen: the length of the session ID. | |
1316 | * psess: (output) on return, if a ticket was decrypted, then this is set to | |
1317 | * point to the resulting session. | |
c519e89f | 1318 | */ |
61fb5923 | 1319 | SSL_TICKET_STATUS tls_decrypt_ticket(SSL *s, const unsigned char *etick, |
df0fed9a TS |
1320 | size_t eticklen, const unsigned char *sess_id, |
1321 | size_t sesslen, SSL_SESSION **psess) | |
0f113f3e | 1322 | { |
61fb5923 | 1323 | SSL_SESSION *sess = NULL; |
0f113f3e MC |
1324 | unsigned char *sdec; |
1325 | const unsigned char *p; | |
ddf6ec00 | 1326 | int slen, renew_ticket = 0, declen; |
61fb5923 | 1327 | SSL_TICKET_STATUS ret = SSL_TICKET_FATAL_ERR_OTHER; |
348240c6 | 1328 | size_t mlen; |
0f113f3e | 1329 | unsigned char tick_hmac[EVP_MAX_MD_SIZE]; |
bf7c6817 | 1330 | HMAC_CTX *hctx = NULL; |
ee763495 | 1331 | EVP_CIPHER_CTX *ctx = NULL; |
222da979 | 1332 | SSL_CTX *tctx = s->session_ctx; |
e97763c9 | 1333 | |
61fb5923 MC |
1334 | if (eticklen == 0) { |
1335 | /* | |
1336 | * The client will accept a ticket but doesn't currently have | |
1337 | * one (TLSv1.2 and below), or treated as a fatal error in TLSv1.3 | |
1338 | */ | |
1339 | ret = SSL_TICKET_EMPTY; | |
1340 | goto end; | |
1341 | } | |
1342 | if (!SSL_IS_TLS13(s) && s->ext.session_secret_cb) { | |
1343 | /* | |
1344 | * Indicate that the ticket couldn't be decrypted rather than | |
1345 | * generating the session from ticket now, trigger | |
1346 | * abbreviated handshake based on external mechanism to | |
1347 | * calculate the master secret later. | |
1348 | */ | |
1349 | ret = SSL_TICKET_NO_DECRYPT; | |
1350 | goto end; | |
1351 | } | |
1352 | ||
ee763495 MC |
1353 | /* Need at least keyname + iv */ |
1354 | if (eticklen < TLSEXT_KEYNAME_LENGTH + EVP_MAX_IV_LENGTH) { | |
df0fed9a | 1355 | ret = SSL_TICKET_NO_DECRYPT; |
c0638ade | 1356 | goto end; |
ee763495 MC |
1357 | } |
1358 | ||
0f113f3e | 1359 | /* Initialize session ticket encryption and HMAC contexts */ |
bf7c6817 | 1360 | hctx = HMAC_CTX_new(); |
c0638ade MC |
1361 | if (hctx == NULL) { |
1362 | ret = SSL_TICKET_FATAL_ERR_MALLOC; | |
1363 | goto end; | |
1364 | } | |
846ec07d | 1365 | ctx = EVP_CIPHER_CTX_new(); |
35b1a433 | 1366 | if (ctx == NULL) { |
df0fed9a | 1367 | ret = SSL_TICKET_FATAL_ERR_MALLOC; |
c0638ade | 1368 | goto end; |
35b1a433 | 1369 | } |
aff8c126 | 1370 | if (tctx->ext.ticket_key_cb) { |
0f113f3e | 1371 | unsigned char *nctick = (unsigned char *)etick; |
ee763495 MC |
1372 | int rv = tctx->ext.ticket_key_cb(s, nctick, |
1373 | nctick + TLSEXT_KEYNAME_LENGTH, | |
1374 | ctx, hctx, 0); | |
c0638ade MC |
1375 | if (rv < 0) { |
1376 | ret = SSL_TICKET_FATAL_ERR_OTHER; | |
1377 | goto end; | |
1378 | } | |
35b1a433 | 1379 | if (rv == 0) { |
df0fed9a | 1380 | ret = SSL_TICKET_NO_DECRYPT; |
c0638ade | 1381 | goto end; |
35b1a433 | 1382 | } |
0f113f3e MC |
1383 | if (rv == 2) |
1384 | renew_ticket = 1; | |
1385 | } else { | |
1386 | /* Check key name matches */ | |
aff8c126 | 1387 | if (memcmp(etick, tctx->ext.tick_key_name, |
ee763495 | 1388 | TLSEXT_KEYNAME_LENGTH) != 0) { |
df0fed9a | 1389 | ret = SSL_TICKET_NO_DECRYPT; |
c0638ade | 1390 | goto end; |
35b1a433 | 1391 | } |
4bfb96f2 TS |
1392 | if (HMAC_Init_ex(hctx, tctx->ext.secure->tick_hmac_key, |
1393 | sizeof(tctx->ext.secure->tick_hmac_key), | |
5f3d93e4 | 1394 | EVP_sha256(), NULL) <= 0 |
a230b26e | 1395 | || EVP_DecryptInit_ex(ctx, EVP_aes_256_cbc(), NULL, |
4bfb96f2 | 1396 | tctx->ext.secure->tick_aes_key, |
ee763495 | 1397 | etick + TLSEXT_KEYNAME_LENGTH) <= 0) { |
c0638ade MC |
1398 | ret = SSL_TICKET_FATAL_ERR_OTHER; |
1399 | goto end; | |
a230b26e | 1400 | } |
c0638ade MC |
1401 | if (SSL_IS_TLS13(s)) |
1402 | renew_ticket = 1; | |
0f113f3e MC |
1403 | } |
1404 | /* | |
1405 | * Attempt to process session ticket, first conduct sanity and integrity | |
1406 | * checks on ticket. | |
1407 | */ | |
bf7c6817 | 1408 | mlen = HMAC_size(hctx); |
348240c6 | 1409 | if (mlen == 0) { |
c0638ade MC |
1410 | ret = SSL_TICKET_FATAL_ERR_OTHER; |
1411 | goto end; | |
0f113f3e | 1412 | } |
c0638ade | 1413 | |
e97763c9 DSH |
1414 | /* Sanity check ticket length: must exceed keyname + IV + HMAC */ |
1415 | if (eticklen <= | |
348240c6 | 1416 | TLSEXT_KEYNAME_LENGTH + EVP_CIPHER_CTX_iv_length(ctx) + mlen) { |
df0fed9a | 1417 | ret = SSL_TICKET_NO_DECRYPT; |
c0638ade | 1418 | goto end; |
e97763c9 | 1419 | } |
0f113f3e MC |
1420 | eticklen -= mlen; |
1421 | /* Check HMAC of encrypted ticket */ | |
bf7c6817 | 1422 | if (HMAC_Update(hctx, etick, eticklen) <= 0 |
a230b26e | 1423 | || HMAC_Final(hctx, tick_hmac, NULL) <= 0) { |
c0638ade MC |
1424 | ret = SSL_TICKET_FATAL_ERR_OTHER; |
1425 | goto end; | |
5f3d93e4 | 1426 | } |
c0638ade | 1427 | |
0f113f3e | 1428 | if (CRYPTO_memcmp(tick_hmac, etick + eticklen, mlen)) { |
c0638ade MC |
1429 | ret = SSL_TICKET_NO_DECRYPT; |
1430 | goto end; | |
0f113f3e MC |
1431 | } |
1432 | /* Attempt to decrypt session data */ | |
1433 | /* Move p after IV to start of encrypted ticket, update length */ | |
57b0d651 BE |
1434 | p = etick + TLSEXT_KEYNAME_LENGTH + EVP_CIPHER_CTX_iv_length(ctx); |
1435 | eticklen -= TLSEXT_KEYNAME_LENGTH + EVP_CIPHER_CTX_iv_length(ctx); | |
0f113f3e | 1436 | sdec = OPENSSL_malloc(eticklen); |
348240c6 MC |
1437 | if (sdec == NULL || EVP_DecryptUpdate(ctx, sdec, &slen, p, |
1438 | (int)eticklen) <= 0) { | |
d1247df2 | 1439 | OPENSSL_free(sdec); |
c0638ade MC |
1440 | ret = SSL_TICKET_FATAL_ERR_OTHER; |
1441 | goto end; | |
0f113f3e | 1442 | } |
348240c6 | 1443 | if (EVP_DecryptFinal(ctx, sdec + slen, &declen) <= 0) { |
0f113f3e | 1444 | OPENSSL_free(sdec); |
c0638ade MC |
1445 | ret = SSL_TICKET_NO_DECRYPT; |
1446 | goto end; | |
0f113f3e | 1447 | } |
348240c6 | 1448 | slen += declen; |
0f113f3e MC |
1449 | p = sdec; |
1450 | ||
1451 | sess = d2i_SSL_SESSION(NULL, &p, slen); | |
d3bc9805 | 1452 | slen -= p - sdec; |
0f113f3e MC |
1453 | OPENSSL_free(sdec); |
1454 | if (sess) { | |
79020b27 | 1455 | /* Some additional consistency checks */ |
32305f88 | 1456 | if (slen != 0) { |
79020b27 | 1457 | SSL_SESSION_free(sess); |
5f96a95e | 1458 | sess = NULL; |
c0638ade MC |
1459 | ret = SSL_TICKET_NO_DECRYPT; |
1460 | goto end; | |
79020b27 | 1461 | } |
0f113f3e MC |
1462 | /* |
1463 | * The session ID, if non-empty, is used by some clients to detect | |
1464 | * that the ticket has been accepted. So we copy it to the session | |
1465 | * structure. If it is empty set length to zero as required by | |
1466 | * standard. | |
1467 | */ | |
32305f88 | 1468 | if (sesslen) { |
0f113f3e | 1469 | memcpy(sess->session_id, sess_id, sesslen); |
32305f88 MC |
1470 | sess->session_id_length = sesslen; |
1471 | } | |
0f113f3e | 1472 | if (renew_ticket) |
c0638ade | 1473 | ret = SSL_TICKET_SUCCESS_RENEW; |
0f113f3e | 1474 | else |
c0638ade MC |
1475 | ret = SSL_TICKET_SUCCESS; |
1476 | goto end; | |
0f113f3e MC |
1477 | } |
1478 | ERR_clear_error(); | |
1479 | /* | |
1480 | * For session parse failure, indicate that we need to send a new ticket. | |
1481 | */ | |
c0638ade MC |
1482 | ret = SSL_TICKET_NO_DECRYPT; |
1483 | ||
1484 | end: | |
846ec07d | 1485 | EVP_CIPHER_CTX_free(ctx); |
bf7c6817 | 1486 | HMAC_CTX_free(hctx); |
c0638ade MC |
1487 | |
1488 | /* | |
61fb5923 MC |
1489 | * If set, the decrypt_ticket_cb() is called unless a fatal error was |
1490 | * detected above. The callback is responsible for checking |ret| before it | |
1491 | * performs any action | |
c0638ade | 1492 | */ |
61fb5923 MC |
1493 | if (s->session_ctx->decrypt_ticket_cb != NULL |
1494 | && (ret == SSL_TICKET_EMPTY | |
1495 | || ret == SSL_TICKET_NO_DECRYPT | |
1496 | || ret == SSL_TICKET_SUCCESS | |
1497 | || ret == SSL_TICKET_SUCCESS_RENEW)) { | |
c0638ade | 1498 | size_t keyname_len = eticklen; |
61fb5923 | 1499 | int retcb; |
c0638ade MC |
1500 | |
1501 | if (keyname_len > TLSEXT_KEYNAME_LENGTH) | |
1502 | keyname_len = TLSEXT_KEYNAME_LENGTH; | |
61fb5923 MC |
1503 | retcb = s->session_ctx->decrypt_ticket_cb(s, sess, etick, keyname_len, |
1504 | ret, | |
1505 | s->session_ctx->ticket_cb_data); | |
1506 | switch (retcb) { | |
1507 | case SSL_TICKET_RETURN_ABORT: | |
1508 | ret = SSL_TICKET_FATAL_ERR_OTHER; | |
1509 | break; | |
1510 | ||
1511 | case SSL_TICKET_RETURN_IGNORE: | |
1512 | ret = SSL_TICKET_NONE; | |
1513 | SSL_SESSION_free(sess); | |
1514 | sess = NULL; | |
1515 | break; | |
1516 | ||
1517 | case SSL_TICKET_RETURN_IGNORE_RENEW: | |
1518 | if (ret != SSL_TICKET_EMPTY && ret != SSL_TICKET_NO_DECRYPT) | |
1519 | ret = SSL_TICKET_NO_DECRYPT; | |
1520 | /* else the value of |ret| will already do the right thing */ | |
1521 | SSL_SESSION_free(sess); | |
1522 | sess = NULL; | |
1523 | break; | |
1524 | ||
1525 | case SSL_TICKET_RETURN_USE: | |
1526 | case SSL_TICKET_RETURN_USE_RENEW: | |
1527 | if (ret != SSL_TICKET_SUCCESS | |
1528 | && ret != SSL_TICKET_SUCCESS_RENEW) | |
1529 | ret = SSL_TICKET_FATAL_ERR_OTHER; | |
1530 | else if (retcb == SSL_TICKET_RETURN_USE) | |
1531 | ret = SSL_TICKET_SUCCESS; | |
1532 | else | |
1533 | ret = SSL_TICKET_SUCCESS_RENEW; | |
1534 | break; | |
1535 | ||
1536 | default: | |
1537 | ret = SSL_TICKET_FATAL_ERR_OTHER; | |
1538 | } | |
c0638ade MC |
1539 | } |
1540 | ||
309371d6 MC |
1541 | if (s->ext.session_secret_cb == NULL || SSL_IS_TLS13(s)) { |
1542 | switch (ret) { | |
1543 | case SSL_TICKET_NO_DECRYPT: | |
1544 | case SSL_TICKET_SUCCESS_RENEW: | |
1545 | case SSL_TICKET_EMPTY: | |
1546 | s->ext.ticket_expected = 1; | |
1547 | } | |
c0638ade MC |
1548 | } |
1549 | ||
61fb5923 MC |
1550 | *psess = sess; |
1551 | ||
1552 | return ret; | |
0f113f3e | 1553 | } |
6434abbf | 1554 | |
b362ccab | 1555 | /* Check to see if a signature algorithm is allowed */ |
b0e9ab95 | 1556 | static int tls12_sigalg_allowed(SSL *s, int op, const SIGALG_LOOKUP *lu) |
0f113f3e | 1557 | { |
703bcee0 | 1558 | unsigned char sigalgstr[2]; |
44b6318f | 1559 | int secbits; |
703bcee0 | 1560 | |
44b6318f | 1561 | /* See if sigalgs is recognised and if hash is enabled */ |
168067b6 | 1562 | if (!tls1_lookup_md(lu, NULL)) |
0f113f3e | 1563 | return 0; |
224b4e37 DSH |
1564 | /* DSA is not allowed in TLS 1.3 */ |
1565 | if (SSL_IS_TLS13(s) && lu->sig == EVP_PKEY_DSA) | |
1566 | return 0; | |
6ffeb269 BK |
1567 | /* TODO(OpenSSL1.2) fully axe DSA/etc. in ClientHello per TLS 1.3 spec */ |
1568 | if (!s->server && !SSL_IS_DTLS(s) && s->s3->tmp.min_ver >= TLS1_3_VERSION | |
1569 | && (lu->sig == EVP_PKEY_DSA || lu->hash_idx == SSL_MD_SHA1_IDX | |
1570 | || lu->hash_idx == SSL_MD_MD5_IDX | |
1571 | || lu->hash_idx == SSL_MD_SHA224_IDX)) | |
1572 | return 0; | |
871980a9 | 1573 | |
0f113f3e | 1574 | /* See if public key algorithm allowed */ |
b8858aec | 1575 | if (ssl_cert_is_disabled(lu->sig_idx)) |
0f113f3e | 1576 | return 0; |
871980a9 MC |
1577 | |
1578 | if (lu->sig == NID_id_GostR3410_2012_256 | |
1579 | || lu->sig == NID_id_GostR3410_2012_512 | |
1580 | || lu->sig == NID_id_GostR3410_2001) { | |
1581 | /* We never allow GOST sig algs on the server with TLSv1.3 */ | |
1582 | if (s->server && SSL_IS_TLS13(s)) | |
1583 | return 0; | |
1584 | if (!s->server | |
1585 | && s->method->version == TLS_ANY_VERSION | |
1586 | && s->s3->tmp.max_ver >= TLS1_3_VERSION) { | |
1587 | int i, num; | |
1588 | STACK_OF(SSL_CIPHER) *sk; | |
1589 | ||
1590 | /* | |
1591 | * We're a client that could negotiate TLSv1.3. We only allow GOST | |
1592 | * sig algs if we could negotiate TLSv1.2 or below and we have GOST | |
1593 | * ciphersuites enabled. | |
1594 | */ | |
1595 | ||
1596 | if (s->s3->tmp.min_ver >= TLS1_3_VERSION) | |
1597 | return 0; | |
1598 | ||
1599 | sk = SSL_get_ciphers(s); | |
1600 | num = sk != NULL ? sk_SSL_CIPHER_num(sk) : 0; | |
1601 | for (i = 0; i < num; i++) { | |
1602 | const SSL_CIPHER *c; | |
1603 | ||
1604 | c = sk_SSL_CIPHER_value(sk, i); | |
1605 | /* Skip disabled ciphers */ | |
1606 | if (ssl_cipher_disabled(s, c, SSL_SECOP_CIPHER_SUPPORTED, 0)) | |
1607 | continue; | |
1608 | ||
1609 | if ((c->algorithm_mkey & SSL_kGOST) != 0) | |
1610 | break; | |
1611 | } | |
1612 | if (i == num) | |
1613 | return 0; | |
1614 | } | |
1615 | } | |
1616 | ||
168067b6 DSH |
1617 | if (lu->hash == NID_undef) |
1618 | return 1; | |
44b6318f DSH |
1619 | /* Security bits: half digest bits */ |
1620 | secbits = EVP_MD_size(ssl_md(lu->hash_idx)) * 4; | |
0f113f3e | 1621 | /* Finally see if security callback allows it */ |
b0e9ab95 DSH |
1622 | sigalgstr[0] = (lu->sigalg >> 8) & 0xff; |
1623 | sigalgstr[1] = lu->sigalg & 0xff; | |
44b6318f | 1624 | return ssl_security(s, op, secbits, lu->hash, (void *)sigalgstr); |
0f113f3e MC |
1625 | } |
1626 | ||
1627 | /* | |
1628 | * Get a mask of disabled public key algorithms based on supported signature | |
1629 | * algorithms. For example if no signature algorithm supports RSA then RSA is | |
1630 | * disabled. | |
b362ccab DSH |
1631 | */ |
1632 | ||
90d9e49a | 1633 | void ssl_set_sig_mask(uint32_t *pmask_a, SSL *s, int op) |
0f113f3e | 1634 | { |
98c792d1 | 1635 | const uint16_t *sigalgs; |
0f113f3e | 1636 | size_t i, sigalgslen; |
13cc2574 | 1637 | uint32_t disabled_mask = SSL_aRSA | SSL_aDSS | SSL_aECDSA; |
0f113f3e | 1638 | /* |
13cc2574 DSH |
1639 | * Go through all signature algorithms seeing if we support any |
1640 | * in disabled_mask. | |
0f113f3e | 1641 | */ |
a9669ddc | 1642 | sigalgslen = tls12_get_psigalgs(s, 1, &sigalgs); |
b2555168 | 1643 | for (i = 0; i < sigalgslen; i++, sigalgs++) { |
b0e9ab95 | 1644 | const SIGALG_LOOKUP *lu = tls1_lookup_sigalg(*sigalgs); |
13cc2574 | 1645 | const SSL_CERT_LOOKUP *clu; |
b0e9ab95 DSH |
1646 | |
1647 | if (lu == NULL) | |
1648 | continue; | |
13cc2574 DSH |
1649 | |
1650 | clu = ssl_cert_lookup_by_idx(lu->sig_idx); | |
b2555168 K |
1651 | if (clu == NULL) |
1652 | continue; | |
13cc2574 DSH |
1653 | |
1654 | /* If algorithm is disabled see if we can enable it */ | |
1655 | if ((clu->amask & disabled_mask) != 0 | |
1656 | && tls12_sigalg_allowed(s, op, lu)) | |
1657 | disabled_mask &= ~clu->amask; | |
0f113f3e | 1658 | } |
13cc2574 | 1659 | *pmask_a |= disabled_mask; |
0f113f3e | 1660 | } |
b362ccab | 1661 | |
ae2f7b37 | 1662 | int tls12_copy_sigalgs(SSL *s, WPACKET *pkt, |
98c792d1 | 1663 | const uint16_t *psig, size_t psiglen) |
2c7b4dbc MC |
1664 | { |
1665 | size_t i; | |
b0e9ab95 | 1666 | int rv = 0; |
c0f9e23c | 1667 | |
703bcee0 | 1668 | for (i = 0; i < psiglen; i++, psig++) { |
b0e9ab95 DSH |
1669 | const SIGALG_LOOKUP *lu = tls1_lookup_sigalg(*psig); |
1670 | ||
1671 | if (!tls12_sigalg_allowed(s, SSL_SECOP_SIGALG_SUPPORTED, lu)) | |
1672 | continue; | |
1673 | if (!WPACKET_put_bytes_u16(pkt, *psig)) | |
1674 | return 0; | |
1675 | /* | |
1676 | * If TLS 1.3 must have at least one valid TLS 1.3 message | |
d8311fc9 | 1677 | * signing algorithm: i.e. neither RSA nor SHA1/SHA224 |
b0e9ab95 DSH |
1678 | */ |
1679 | if (rv == 0 && (!SSL_IS_TLS13(s) | |
d8311fc9 MC |
1680 | || (lu->sig != EVP_PKEY_RSA |
1681 | && lu->hash != NID_sha1 | |
1682 | && lu->hash != NID_sha224))) | |
b0e9ab95 | 1683 | rv = 1; |
2c7b4dbc | 1684 | } |
5528d68f DSH |
1685 | if (rv == 0) |
1686 | SSLerr(SSL_F_TLS12_COPY_SIGALGS, SSL_R_NO_SUITABLE_SIGNATURE_ALGORITHM); | |
b0e9ab95 | 1687 | return rv; |
2c7b4dbc MC |
1688 | } |
1689 | ||
4453cd8c | 1690 | /* Given preference and allowed sigalgs set shared sigalgs */ |
4d43ee28 | 1691 | static size_t tls12_shared_sigalgs(SSL *s, const SIGALG_LOOKUP **shsig, |
98c792d1 DSH |
1692 | const uint16_t *pref, size_t preflen, |
1693 | const uint16_t *allow, size_t allowlen) | |
0f113f3e | 1694 | { |
98c792d1 | 1695 | const uint16_t *ptmp, *atmp; |
0f113f3e | 1696 | size_t i, j, nmatch = 0; |
703bcee0 | 1697 | for (i = 0, ptmp = pref; i < preflen; i++, ptmp++) { |
b0e9ab95 DSH |
1698 | const SIGALG_LOOKUP *lu = tls1_lookup_sigalg(*ptmp); |
1699 | ||
0f113f3e | 1700 | /* Skip disabled hashes or signature algorithms */ |
b0e9ab95 | 1701 | if (!tls12_sigalg_allowed(s, SSL_SECOP_SIGALG_SHARED, lu)) |
0f113f3e | 1702 | continue; |
703bcee0 MC |
1703 | for (j = 0, atmp = allow; j < allowlen; j++, atmp++) { |
1704 | if (*ptmp == *atmp) { | |
0f113f3e | 1705 | nmatch++; |
b0e9ab95 DSH |
1706 | if (shsig) |
1707 | *shsig++ = lu; | |
0f113f3e MC |
1708 | break; |
1709 | } | |
1710 | } | |
1711 | } | |
1712 | return nmatch; | |
1713 | } | |
4453cd8c DSH |
1714 | |
1715 | /* Set shared signature algorithms for SSL structures */ | |
1716 | static int tls1_set_shared_sigalgs(SSL *s) | |
0f113f3e | 1717 | { |
98c792d1 | 1718 | const uint16_t *pref, *allow, *conf; |
0f113f3e MC |
1719 | size_t preflen, allowlen, conflen; |
1720 | size_t nmatch; | |
4d43ee28 | 1721 | const SIGALG_LOOKUP **salgs = NULL; |
0f113f3e MC |
1722 | CERT *c = s->cert; |
1723 | unsigned int is_suiteb = tls1_suiteb(s); | |
b548a1f1 RS |
1724 | |
1725 | OPENSSL_free(c->shared_sigalgs); | |
1726 | c->shared_sigalgs = NULL; | |
1727 | c->shared_sigalgslen = 0; | |
0f113f3e MC |
1728 | /* If client use client signature algorithms if not NULL */ |
1729 | if (!s->server && c->client_sigalgs && !is_suiteb) { | |
1730 | conf = c->client_sigalgs; | |
1731 | conflen = c->client_sigalgslen; | |
1732 | } else if (c->conf_sigalgs && !is_suiteb) { | |
1733 | conf = c->conf_sigalgs; | |
1734 | conflen = c->conf_sigalgslen; | |
1735 | } else | |
a9669ddc | 1736 | conflen = tls12_get_psigalgs(s, 0, &conf); |
0f113f3e MC |
1737 | if (s->options & SSL_OP_CIPHER_SERVER_PREFERENCE || is_suiteb) { |
1738 | pref = conf; | |
1739 | preflen = conflen; | |
76106e60 DSH |
1740 | allow = s->s3->tmp.peer_sigalgs; |
1741 | allowlen = s->s3->tmp.peer_sigalgslen; | |
0f113f3e MC |
1742 | } else { |
1743 | allow = conf; | |
1744 | allowlen = conflen; | |
76106e60 DSH |
1745 | pref = s->s3->tmp.peer_sigalgs; |
1746 | preflen = s->s3->tmp.peer_sigalgslen; | |
0f113f3e MC |
1747 | } |
1748 | nmatch = tls12_shared_sigalgs(s, NULL, pref, preflen, allow, allowlen); | |
34e3edbf | 1749 | if (nmatch) { |
cdb10bae RS |
1750 | if ((salgs = OPENSSL_malloc(nmatch * sizeof(*salgs))) == NULL) { |
1751 | SSLerr(SSL_F_TLS1_SET_SHARED_SIGALGS, ERR_R_MALLOC_FAILURE); | |
34e3edbf | 1752 | return 0; |
cdb10bae | 1753 | } |
34e3edbf DSH |
1754 | nmatch = tls12_shared_sigalgs(s, salgs, pref, preflen, allow, allowlen); |
1755 | } else { | |
1756 | salgs = NULL; | |
1757 | } | |
0f113f3e MC |
1758 | c->shared_sigalgs = salgs; |
1759 | c->shared_sigalgslen = nmatch; | |
1760 | return 1; | |
1761 | } | |
4453cd8c | 1762 | |
9e84a42d | 1763 | int tls1_save_u16(PACKET *pkt, uint16_t **pdest, size_t *pdestlen) |
0f113f3e | 1764 | { |
98c792d1 | 1765 | unsigned int stmp; |
703bcee0 | 1766 | size_t size, i; |
9e84a42d | 1767 | uint16_t *buf; |
0f113f3e | 1768 | |
703bcee0 MC |
1769 | size = PACKET_remaining(pkt); |
1770 | ||
1771 | /* Invalid data length */ | |
8f12296e | 1772 | if (size == 0 || (size & 1) != 0) |
703bcee0 MC |
1773 | return 0; |
1774 | ||
1775 | size >>= 1; | |
1776 | ||
cdb10bae RS |
1777 | if ((buf = OPENSSL_malloc(size * sizeof(*buf))) == NULL) { |
1778 | SSLerr(SSL_F_TLS1_SAVE_U16, ERR_R_MALLOC_FAILURE); | |
0f113f3e | 1779 | return 0; |
cdb10bae | 1780 | } |
98c792d1 | 1781 | for (i = 0; i < size && PACKET_get_net_2(pkt, &stmp); i++) |
9e84a42d | 1782 | buf[i] = stmp; |
703bcee0 | 1783 | |
9e84a42d DSH |
1784 | if (i != size) { |
1785 | OPENSSL_free(buf); | |
703bcee0 | 1786 | return 0; |
9e84a42d DSH |
1787 | } |
1788 | ||
1789 | OPENSSL_free(*pdest); | |
1790 | *pdest = buf; | |
1791 | *pdestlen = size; | |
703bcee0 | 1792 | |
0f113f3e MC |
1793 | return 1; |
1794 | } | |
6b7be581 | 1795 | |
c589c34e | 1796 | int tls1_save_sigalgs(SSL *s, PACKET *pkt, int cert) |
9e84a42d DSH |
1797 | { |
1798 | /* Extension ignored for inappropriate versions */ | |
1799 | if (!SSL_USE_SIGALGS(s)) | |
1800 | return 1; | |
1801 | /* Should never happen */ | |
1802 | if (s->cert == NULL) | |
1803 | return 0; | |
1804 | ||
c589c34e BK |
1805 | if (cert) |
1806 | return tls1_save_u16(pkt, &s->s3->tmp.peer_cert_sigalgs, | |
1807 | &s->s3->tmp.peer_cert_sigalgslen); | |
1808 | else | |
1809 | return tls1_save_u16(pkt, &s->s3->tmp.peer_sigalgs, | |
1810 | &s->s3->tmp.peer_sigalgslen); | |
9e84a42d | 1811 | |
9e84a42d DSH |
1812 | } |
1813 | ||
1814 | /* Set preferred digest for each key type */ | |
1815 | ||
c800c27a | 1816 | int tls1_process_sigalgs(SSL *s) |
0f113f3e | 1817 | { |
0f113f3e | 1818 | size_t i; |
f7d53487 | 1819 | uint32_t *pvalid = s->s3->tmp.valid_flags; |
0f113f3e | 1820 | CERT *c = s->cert; |
4d43ee28 | 1821 | |
0f113f3e MC |
1822 | if (!tls1_set_shared_sigalgs(s)) |
1823 | return 0; | |
1824 | ||
9195ddcd DSH |
1825 | for (i = 0; i < SSL_PKEY_NUM; i++) |
1826 | pvalid[i] = 0; | |
1827 | ||
4d43ee28 DSH |
1828 | for (i = 0; i < c->shared_sigalgslen; i++) { |
1829 | const SIGALG_LOOKUP *sigptr = c->shared_sigalgs[i]; | |
9195ddcd | 1830 | int idx = sigptr->sig_idx; |
4d43ee28 | 1831 | |
523fb323 | 1832 | /* Ignore PKCS1 based sig algs in TLSv1.3 */ |
4d43ee28 | 1833 | if (SSL_IS_TLS13(s) && sigptr->sig == EVP_PKEY_RSA) |
523fb323 | 1834 | continue; |
9195ddcd | 1835 | /* If not disabled indicate we can explicitly sign */ |
b8858aec DSH |
1836 | if (pvalid[idx] == 0 && !ssl_cert_is_disabled(idx)) |
1837 | pvalid[idx] = CERT_PKEY_EXPLICIT_SIGN | CERT_PKEY_SIGN; | |
0f113f3e MC |
1838 | } |
1839 | return 1; | |
1840 | } | |
4817504d | 1841 | |
e7f8ff43 | 1842 | int SSL_get_sigalgs(SSL *s, int idx, |
0f113f3e MC |
1843 | int *psign, int *phash, int *psignhash, |
1844 | unsigned char *rsig, unsigned char *rhash) | |
1845 | { | |
98c792d1 | 1846 | uint16_t *psig = s->s3->tmp.peer_sigalgs; |
703bcee0 | 1847 | size_t numsigalgs = s->s3->tmp.peer_sigalgslen; |
348240c6 | 1848 | if (psig == NULL || numsigalgs > INT_MAX) |
0f113f3e MC |
1849 | return 0; |
1850 | if (idx >= 0) { | |
4d43ee28 DSH |
1851 | const SIGALG_LOOKUP *lu; |
1852 | ||
703bcee0 | 1853 | if (idx >= (int)numsigalgs) |
0f113f3e MC |
1854 | return 0; |
1855 | psig += idx; | |
4d43ee28 | 1856 | if (rhash != NULL) |
536199ec | 1857 | *rhash = (unsigned char)((*psig >> 8) & 0xff); |
4d43ee28 | 1858 | if (rsig != NULL) |
536199ec | 1859 | *rsig = (unsigned char)(*psig & 0xff); |
4d43ee28 DSH |
1860 | lu = tls1_lookup_sigalg(*psig); |
1861 | if (psign != NULL) | |
1862 | *psign = lu != NULL ? lu->sig : NID_undef; | |
1863 | if (phash != NULL) | |
1864 | *phash = lu != NULL ? lu->hash : NID_undef; | |
1865 | if (psignhash != NULL) | |
1866 | *psignhash = lu != NULL ? lu->sigandhash : NID_undef; | |
0f113f3e | 1867 | } |
348240c6 | 1868 | return (int)numsigalgs; |
0f113f3e | 1869 | } |
4453cd8c DSH |
1870 | |
1871 | int SSL_get_shared_sigalgs(SSL *s, int idx, | |
0f113f3e MC |
1872 | int *psign, int *phash, int *psignhash, |
1873 | unsigned char *rsig, unsigned char *rhash) | |
1874 | { | |
4d43ee28 DSH |
1875 | const SIGALG_LOOKUP *shsigalgs; |
1876 | if (s->cert->shared_sigalgs == NULL | |
6d047e06 | 1877 | || idx < 0 |
4d43ee28 DSH |
1878 | || idx >= (int)s->cert->shared_sigalgslen |
1879 | || s->cert->shared_sigalgslen > INT_MAX) | |
0f113f3e | 1880 | return 0; |
4d43ee28 DSH |
1881 | shsigalgs = s->cert->shared_sigalgs[idx]; |
1882 | if (phash != NULL) | |
1883 | *phash = shsigalgs->hash; | |
1884 | if (psign != NULL) | |
1885 | *psign = shsigalgs->sig; | |
1886 | if (psignhash != NULL) | |
1887 | *psignhash = shsigalgs->sigandhash; | |
1888 | if (rsig != NULL) | |
1889 | *rsig = (unsigned char)(shsigalgs->sigalg & 0xff); | |
1890 | if (rhash != NULL) | |
1891 | *rhash = (unsigned char)((shsigalgs->sigalg >> 8) & 0xff); | |
348240c6 | 1892 | return (int)s->cert->shared_sigalgslen; |
0f113f3e MC |
1893 | } |
1894 | ||
787ebcaf DSH |
1895 | /* Maximum possible number of unique entries in sigalgs array */ |
1896 | #define TLS_MAX_SIGALGCNT (OSSL_NELEM(sigalg_lookup_tbl) * 2) | |
0f229cce | 1897 | |
0f113f3e MC |
1898 | typedef struct { |
1899 | size_t sigalgcnt; | |
fd5e1a8c BK |
1900 | /* TLSEXT_SIGALG_XXX values */ |
1901 | uint16_t sigalgs[TLS_MAX_SIGALGCNT]; | |
0f113f3e | 1902 | } sig_cb_st; |
0f229cce | 1903 | |
431f458d DSH |
1904 | static void get_sigorhash(int *psig, int *phash, const char *str) |
1905 | { | |
1906 | if (strcmp(str, "RSA") == 0) { | |
1907 | *psig = EVP_PKEY_RSA; | |
b2eb6998 DSH |
1908 | } else if (strcmp(str, "RSA-PSS") == 0 || strcmp(str, "PSS") == 0) { |
1909 | *psig = EVP_PKEY_RSA_PSS; | |
431f458d DSH |
1910 | } else if (strcmp(str, "DSA") == 0) { |
1911 | *psig = EVP_PKEY_DSA; | |
1912 | } else if (strcmp(str, "ECDSA") == 0) { | |
1913 | *psig = EVP_PKEY_EC; | |
1914 | } else { | |
1915 | *phash = OBJ_sn2nid(str); | |
1916 | if (*phash == NID_undef) | |
1917 | *phash = OBJ_ln2nid(str); | |
1918 | } | |
1919 | } | |
787ebcaf DSH |
1920 | /* Maximum length of a signature algorithm string component */ |
1921 | #define TLS_MAX_SIGSTRING_LEN 40 | |
431f458d | 1922 | |
0f229cce | 1923 | static int sig_cb(const char *elem, int len, void *arg) |
0f113f3e MC |
1924 | { |
1925 | sig_cb_st *sarg = arg; | |
1926 | size_t i; | |
fd5e1a8c | 1927 | const SIGALG_LOOKUP *s; |
787ebcaf | 1928 | char etmp[TLS_MAX_SIGSTRING_LEN], *p; |
431f458d | 1929 | int sig_alg = NID_undef, hash_alg = NID_undef; |
2747d73c KR |
1930 | if (elem == NULL) |
1931 | return 0; | |
787ebcaf | 1932 | if (sarg->sigalgcnt == TLS_MAX_SIGALGCNT) |
0f113f3e MC |
1933 | return 0; |
1934 | if (len > (int)(sizeof(etmp) - 1)) | |
1935 | return 0; | |
1936 | memcpy(etmp, elem, len); | |
1937 | etmp[len] = 0; | |
1938 | p = strchr(etmp, '+'); | |
fd5e1a8c BK |
1939 | /* |
1940 | * We only allow SignatureSchemes listed in the sigalg_lookup_tbl; | |
1941 | * if there's no '+' in the provided name, look for the new-style combined | |
1942 | * name. If not, match both sig+hash to find the needed SIGALG_LOOKUP. | |
1943 | * Just sig+hash is not unique since TLS 1.3 adds rsa_pss_pss_* and | |
1944 | * rsa_pss_rsae_* that differ only by public key OID; in such cases | |
1945 | * we will pick the _rsae_ variant, by virtue of them appearing earlier | |
1946 | * in the table. | |
1947 | */ | |
8a43a42a | 1948 | if (p == NULL) { |
8a43a42a DSH |
1949 | for (i = 0, s = sigalg_lookup_tbl; i < OSSL_NELEM(sigalg_lookup_tbl); |
1950 | i++, s++) { | |
1951 | if (s->name != NULL && strcmp(etmp, s->name) == 0) { | |
fd5e1a8c | 1952 | sarg->sigalgs[sarg->sigalgcnt++] = s->sigalg; |
8a43a42a DSH |
1953 | break; |
1954 | } | |
1955 | } | |
fd5e1a8c BK |
1956 | if (i == OSSL_NELEM(sigalg_lookup_tbl)) |
1957 | return 0; | |
8a43a42a DSH |
1958 | } else { |
1959 | *p = 0; | |
1960 | p++; | |
1961 | if (*p == 0) | |
1962 | return 0; | |
1963 | get_sigorhash(&sig_alg, &hash_alg, etmp); | |
1964 | get_sigorhash(&sig_alg, &hash_alg, p); | |
fd5e1a8c BK |
1965 | if (sig_alg == NID_undef || hash_alg == NID_undef) |
1966 | return 0; | |
1967 | for (i = 0, s = sigalg_lookup_tbl; i < OSSL_NELEM(sigalg_lookup_tbl); | |
1968 | i++, s++) { | |
1969 | if (s->hash == hash_alg && s->sig == sig_alg) { | |
1970 | sarg->sigalgs[sarg->sigalgcnt++] = s->sigalg; | |
1971 | break; | |
1972 | } | |
1973 | } | |
1974 | if (i == OSSL_NELEM(sigalg_lookup_tbl)) | |
1975 | return 0; | |
8a43a42a | 1976 | } |
0f113f3e | 1977 | |
fd5e1a8c BK |
1978 | /* Reject duplicates */ |
1979 | for (i = 0; i < sarg->sigalgcnt - 1; i++) { | |
c1acef92 | 1980 | if (sarg->sigalgs[i] == sarg->sigalgs[sarg->sigalgcnt - 1]) { |
fd5e1a8c | 1981 | sarg->sigalgcnt--; |
0f113f3e | 1982 | return 0; |
fd5e1a8c | 1983 | } |
0f113f3e | 1984 | } |
0f113f3e MC |
1985 | return 1; |
1986 | } | |
1987 | ||
1988 | /* | |
9d22666e | 1989 | * Set supported signature algorithms based on a colon separated list of the |
0f113f3e MC |
1990 | * form sig+hash e.g. RSA+SHA512:DSA+SHA512 |
1991 | */ | |
3dbc46df | 1992 | int tls1_set_sigalgs_list(CERT *c, const char *str, int client) |
0f113f3e MC |
1993 | { |
1994 | sig_cb_st sig; | |
1995 | sig.sigalgcnt = 0; | |
1996 | if (!CONF_parse_list(str, ':', 1, sig_cb, &sig)) | |
1997 | return 0; | |
1998 | if (c == NULL) | |
1999 | return 1; | |
fd5e1a8c BK |
2000 | return tls1_set_raw_sigalgs(c, sig.sigalgs, sig.sigalgcnt, client); |
2001 | } | |
2002 | ||
2003 | int tls1_set_raw_sigalgs(CERT *c, const uint16_t *psigs, size_t salglen, | |
2004 | int client) | |
2005 | { | |
2006 | uint16_t *sigalgs; | |
2007 | ||
cdb10bae RS |
2008 | if ((sigalgs = OPENSSL_malloc(salglen * sizeof(*sigalgs))) == NULL) { |
2009 | SSLerr(SSL_F_TLS1_SET_RAW_SIGALGS, ERR_R_MALLOC_FAILURE); | |
fd5e1a8c | 2010 | return 0; |
cdb10bae | 2011 | } |
fd5e1a8c BK |
2012 | memcpy(sigalgs, psigs, salglen * sizeof(*sigalgs)); |
2013 | ||
2014 | if (client) { | |
2015 | OPENSSL_free(c->client_sigalgs); | |
2016 | c->client_sigalgs = sigalgs; | |
2017 | c->client_sigalgslen = salglen; | |
2018 | } else { | |
2019 | OPENSSL_free(c->conf_sigalgs); | |
2020 | c->conf_sigalgs = sigalgs; | |
2021 | c->conf_sigalgslen = salglen; | |
2022 | } | |
2023 | ||
2024 | return 1; | |
0f113f3e MC |
2025 | } |
2026 | ||
a230b26e | 2027 | int tls1_set_sigalgs(CERT *c, const int *psig_nids, size_t salglen, int client) |
0f113f3e | 2028 | { |
98c792d1 | 2029 | uint16_t *sigalgs, *sptr; |
0f113f3e | 2030 | size_t i; |
63c1df09 | 2031 | |
0f113f3e MC |
2032 | if (salglen & 1) |
2033 | return 0; | |
cdb10bae RS |
2034 | if ((sigalgs = OPENSSL_malloc((salglen / 2) * sizeof(*sigalgs))) == NULL) { |
2035 | SSLerr(SSL_F_TLS1_SET_SIGALGS, ERR_R_MALLOC_FAILURE); | |
0f113f3e | 2036 | return 0; |
cdb10bae | 2037 | } |
0f113f3e | 2038 | for (i = 0, sptr = sigalgs; i < salglen; i += 2) { |
63c1df09 | 2039 | size_t j; |
7a531ee4 | 2040 | const SIGALG_LOOKUP *curr; |
63c1df09 MC |
2041 | int md_id = *psig_nids++; |
2042 | int sig_id = *psig_nids++; | |
2043 | ||
2044 | for (j = 0, curr = sigalg_lookup_tbl; j < OSSL_NELEM(sigalg_lookup_tbl); | |
2045 | j++, curr++) { | |
fe3066ee | 2046 | if (curr->hash == md_id && curr->sig == sig_id) { |
63c1df09 MC |
2047 | *sptr++ = curr->sigalg; |
2048 | break; | |
2049 | } | |
2050 | } | |
0f113f3e | 2051 | |
63c1df09 | 2052 | if (j == OSSL_NELEM(sigalg_lookup_tbl)) |
0f113f3e | 2053 | goto err; |
0f113f3e MC |
2054 | } |
2055 | ||
2056 | if (client) { | |
b548a1f1 | 2057 | OPENSSL_free(c->client_sigalgs); |
0f113f3e | 2058 | c->client_sigalgs = sigalgs; |
7a531ee4 | 2059 | c->client_sigalgslen = salglen / 2; |
0f113f3e | 2060 | } else { |
b548a1f1 | 2061 | OPENSSL_free(c->conf_sigalgs); |
0f113f3e | 2062 | c->conf_sigalgs = sigalgs; |
7a531ee4 | 2063 | c->conf_sigalgslen = salglen / 2; |
0f113f3e MC |
2064 | } |
2065 | ||
2066 | return 1; | |
2067 | ||
2068 | err: | |
2069 | OPENSSL_free(sigalgs); | |
2070 | return 0; | |
2071 | } | |
4453cd8c | 2072 | |
d61ff83b | 2073 | static int tls1_check_sig_alg(CERT *c, X509 *x, int default_nid) |
0f113f3e MC |
2074 | { |
2075 | int sig_nid; | |
2076 | size_t i; | |
2077 | if (default_nid == -1) | |
2078 | return 1; | |
2079 | sig_nid = X509_get_signature_nid(x); | |
2080 | if (default_nid) | |
2081 | return sig_nid == default_nid ? 1 : 0; | |
2082 | for (i = 0; i < c->shared_sigalgslen; i++) | |
4d43ee28 | 2083 | if (sig_nid == c->shared_sigalgs[i]->sigandhash) |
0f113f3e MC |
2084 | return 1; |
2085 | return 0; | |
2086 | } | |
2087 | ||
6dbb6219 DSH |
2088 | /* Check to see if a certificate issuer name matches list of CA names */ |
2089 | static int ssl_check_ca_name(STACK_OF(X509_NAME) *names, X509 *x) | |
0f113f3e MC |
2090 | { |
2091 | X509_NAME *nm; | |
2092 | int i; | |
2093 | nm = X509_get_issuer_name(x); | |
2094 | for (i = 0; i < sk_X509_NAME_num(names); i++) { | |
2095 | if (!X509_NAME_cmp(nm, sk_X509_NAME_value(names, i))) | |
2096 | return 1; | |
2097 | } | |
2098 | return 0; | |
2099 | } | |
2100 | ||
2101 | /* | |
2102 | * Check certificate chain is consistent with TLS extensions and is usable by | |
2103 | * server. This servers two purposes: it allows users to check chains before | |
2104 | * passing them to the server and it allows the server to check chains before | |
2105 | * attempting to use them. | |
d61ff83b | 2106 | */ |
6dbb6219 | 2107 | |
69687aa8 | 2108 | /* Flags which need to be set for a certificate when strict mode not set */ |
6dbb6219 | 2109 | |
e481f9b9 | 2110 | #define CERT_PKEY_VALID_FLAGS \ |
0f113f3e | 2111 | (CERT_PKEY_EE_SIGNATURE|CERT_PKEY_EE_PARAM) |
6dbb6219 | 2112 | /* Strict mode flags */ |
e481f9b9 | 2113 | #define CERT_PKEY_STRICT_FLAGS \ |
0f113f3e MC |
2114 | (CERT_PKEY_VALID_FLAGS|CERT_PKEY_CA_SIGNATURE|CERT_PKEY_CA_PARAM \ |
2115 | | CERT_PKEY_ISSUER_NAME|CERT_PKEY_CERT_TYPE) | |
6dbb6219 | 2116 | |
d61ff83b | 2117 | int tls1_check_chain(SSL *s, X509 *x, EVP_PKEY *pk, STACK_OF(X509) *chain, |
0f113f3e MC |
2118 | int idx) |
2119 | { | |
2120 | int i; | |
2121 | int rv = 0; | |
2122 | int check_flags = 0, strict_mode; | |
2123 | CERT_PKEY *cpk = NULL; | |
2124 | CERT *c = s->cert; | |
f7d53487 | 2125 | uint32_t *pvalid; |
0f113f3e MC |
2126 | unsigned int suiteb_flags = tls1_suiteb(s); |
2127 | /* idx == -1 means checking server chains */ | |
2128 | if (idx != -1) { | |
2129 | /* idx == -2 means checking client certificate chains */ | |
2130 | if (idx == -2) { | |
2131 | cpk = c->key; | |
348240c6 | 2132 | idx = (int)(cpk - c->pkeys); |
0f113f3e MC |
2133 | } else |
2134 | cpk = c->pkeys + idx; | |
6383d316 | 2135 | pvalid = s->s3->tmp.valid_flags + idx; |
0f113f3e MC |
2136 | x = cpk->x509; |
2137 | pk = cpk->privatekey; | |
2138 | chain = cpk->chain; | |
2139 | strict_mode = c->cert_flags & SSL_CERT_FLAGS_CHECK_TLS_STRICT; | |
2140 | /* If no cert or key, forget it */ | |
2141 | if (!x || !pk) | |
2142 | goto end; | |
0f113f3e | 2143 | } else { |
52fd27f9 DSH |
2144 | size_t certidx; |
2145 | ||
0f113f3e | 2146 | if (!x || !pk) |
d813f9eb | 2147 | return 0; |
52fd27f9 DSH |
2148 | |
2149 | if (ssl_cert_lookup_by_pkey(pk, &certidx) == NULL) | |
d813f9eb | 2150 | return 0; |
52fd27f9 | 2151 | idx = certidx; |
6383d316 DSH |
2152 | pvalid = s->s3->tmp.valid_flags + idx; |
2153 | ||
0f113f3e MC |
2154 | if (c->cert_flags & SSL_CERT_FLAGS_CHECK_TLS_STRICT) |
2155 | check_flags = CERT_PKEY_STRICT_FLAGS; | |
2156 | else | |
2157 | check_flags = CERT_PKEY_VALID_FLAGS; | |
2158 | strict_mode = 1; | |
2159 | } | |
2160 | ||
2161 | if (suiteb_flags) { | |
2162 | int ok; | |
2163 | if (check_flags) | |
2164 | check_flags |= CERT_PKEY_SUITEB; | |
2165 | ok = X509_chain_check_suiteb(NULL, x, chain, suiteb_flags); | |
2166 | if (ok == X509_V_OK) | |
2167 | rv |= CERT_PKEY_SUITEB; | |
2168 | else if (!check_flags) | |
2169 | goto end; | |
2170 | } | |
2171 | ||
2172 | /* | |
2173 | * Check all signature algorithms are consistent with signature | |
2174 | * algorithms extension if TLS 1.2 or later and strict mode. | |
2175 | */ | |
2176 | if (TLS1_get_version(s) >= TLS1_2_VERSION && strict_mode) { | |
2177 | int default_nid; | |
536199ec | 2178 | int rsign = 0; |
c589c34e BK |
2179 | if (s->s3->tmp.peer_cert_sigalgs != NULL |
2180 | || s->s3->tmp.peer_sigalgs != NULL) { | |
0f113f3e MC |
2181 | default_nid = 0; |
2182 | /* If no sigalgs extension use defaults from RFC5246 */ | |
c589c34e | 2183 | } else { |
0f113f3e | 2184 | switch (idx) { |
d0ff28f8 | 2185 | case SSL_PKEY_RSA: |
536199ec | 2186 | rsign = EVP_PKEY_RSA; |
0f113f3e MC |
2187 | default_nid = NID_sha1WithRSAEncryption; |
2188 | break; | |
2189 | ||
2190 | case SSL_PKEY_DSA_SIGN: | |
536199ec | 2191 | rsign = EVP_PKEY_DSA; |
0f113f3e MC |
2192 | default_nid = NID_dsaWithSHA1; |
2193 | break; | |
2194 | ||
2195 | case SSL_PKEY_ECC: | |
536199ec | 2196 | rsign = EVP_PKEY_EC; |
0f113f3e MC |
2197 | default_nid = NID_ecdsa_with_SHA1; |
2198 | break; | |
2199 | ||
e44380a9 | 2200 | case SSL_PKEY_GOST01: |
536199ec | 2201 | rsign = NID_id_GostR3410_2001; |
e44380a9 DB |
2202 | default_nid = NID_id_GostR3411_94_with_GostR3410_2001; |
2203 | break; | |
2204 | ||
2205 | case SSL_PKEY_GOST12_256: | |
536199ec | 2206 | rsign = NID_id_GostR3410_2012_256; |
e44380a9 DB |
2207 | default_nid = NID_id_tc26_signwithdigest_gost3410_2012_256; |
2208 | break; | |
2209 | ||
2210 | case SSL_PKEY_GOST12_512: | |
536199ec | 2211 | rsign = NID_id_GostR3410_2012_512; |
e44380a9 DB |
2212 | default_nid = NID_id_tc26_signwithdigest_gost3410_2012_512; |
2213 | break; | |
2214 | ||
0f113f3e MC |
2215 | default: |
2216 | default_nid = -1; | |
2217 | break; | |
2218 | } | |
2219 | } | |
2220 | /* | |
2221 | * If peer sent no signature algorithms extension and we have set | |
2222 | * preferred signature algorithms check we support sha1. | |
2223 | */ | |
2224 | if (default_nid > 0 && c->conf_sigalgs) { | |
2225 | size_t j; | |
98c792d1 | 2226 | const uint16_t *p = c->conf_sigalgs; |
703bcee0 | 2227 | for (j = 0; j < c->conf_sigalgslen; j++, p++) { |
44b6318f DSH |
2228 | const SIGALG_LOOKUP *lu = tls1_lookup_sigalg(*p); |
2229 | ||
2230 | if (lu != NULL && lu->hash == NID_sha1 && lu->sig == rsign) | |
0f113f3e MC |
2231 | break; |
2232 | } | |
2233 | if (j == c->conf_sigalgslen) { | |
2234 | if (check_flags) | |
2235 | goto skip_sigs; | |
2236 | else | |
2237 | goto end; | |
2238 | } | |
2239 | } | |
2240 | /* Check signature algorithm of each cert in chain */ | |
2241 | if (!tls1_check_sig_alg(c, x, default_nid)) { | |
2242 | if (!check_flags) | |
2243 | goto end; | |
2244 | } else | |
2245 | rv |= CERT_PKEY_EE_SIGNATURE; | |
2246 | rv |= CERT_PKEY_CA_SIGNATURE; | |
2247 | for (i = 0; i < sk_X509_num(chain); i++) { | |
2248 | if (!tls1_check_sig_alg(c, sk_X509_value(chain, i), default_nid)) { | |
2249 | if (check_flags) { | |
2250 | rv &= ~CERT_PKEY_CA_SIGNATURE; | |
2251 | break; | |
2252 | } else | |
2253 | goto end; | |
2254 | } | |
2255 | } | |
2256 | } | |
2257 | /* Else not TLS 1.2, so mark EE and CA signing algorithms OK */ | |
2258 | else if (check_flags) | |
2259 | rv |= CERT_PKEY_EE_SIGNATURE | CERT_PKEY_CA_SIGNATURE; | |
2260 | skip_sigs: | |
2261 | /* Check cert parameters are consistent */ | |
9195ddcd | 2262 | if (tls1_check_cert_param(s, x, 1)) |
0f113f3e MC |
2263 | rv |= CERT_PKEY_EE_PARAM; |
2264 | else if (!check_flags) | |
2265 | goto end; | |
2266 | if (!s->server) | |
2267 | rv |= CERT_PKEY_CA_PARAM; | |
2268 | /* In strict mode check rest of chain too */ | |
2269 | else if (strict_mode) { | |
2270 | rv |= CERT_PKEY_CA_PARAM; | |
2271 | for (i = 0; i < sk_X509_num(chain); i++) { | |
2272 | X509 *ca = sk_X509_value(chain, i); | |
2273 | if (!tls1_check_cert_param(s, ca, 0)) { | |
2274 | if (check_flags) { | |
2275 | rv &= ~CERT_PKEY_CA_PARAM; | |
2276 | break; | |
2277 | } else | |
2278 | goto end; | |
2279 | } | |
2280 | } | |
2281 | } | |
2282 | if (!s->server && strict_mode) { | |
2283 | STACK_OF(X509_NAME) *ca_dn; | |
2284 | int check_type = 0; | |
3aeb9348 | 2285 | switch (EVP_PKEY_id(pk)) { |
0f113f3e MC |
2286 | case EVP_PKEY_RSA: |
2287 | check_type = TLS_CT_RSA_SIGN; | |
2288 | break; | |
2289 | case EVP_PKEY_DSA: | |
2290 | check_type = TLS_CT_DSS_SIGN; | |
2291 | break; | |
2292 | case EVP_PKEY_EC: | |
2293 | check_type = TLS_CT_ECDSA_SIGN; | |
2294 | break; | |
0f113f3e MC |
2295 | } |
2296 | if (check_type) { | |
75c13e78 DSH |
2297 | const uint8_t *ctypes = s->s3->tmp.ctype; |
2298 | size_t j; | |
2299 | ||
2300 | for (j = 0; j < s->s3->tmp.ctype_len; j++, ctypes++) { | |
2301 | if (*ctypes == check_type) { | |
0f113f3e MC |
2302 | rv |= CERT_PKEY_CERT_TYPE; |
2303 | break; | |
2304 | } | |
2305 | } | |
2306 | if (!(rv & CERT_PKEY_CERT_TYPE) && !check_flags) | |
2307 | goto end; | |
75c13e78 | 2308 | } else { |
0f113f3e | 2309 | rv |= CERT_PKEY_CERT_TYPE; |
75c13e78 | 2310 | } |
0f113f3e | 2311 | |
fa7c2637 | 2312 | ca_dn = s->s3->tmp.peer_ca_names; |
0f113f3e MC |
2313 | |
2314 | if (!sk_X509_NAME_num(ca_dn)) | |
2315 | rv |= CERT_PKEY_ISSUER_NAME; | |
2316 | ||
2317 | if (!(rv & CERT_PKEY_ISSUER_NAME)) { | |
2318 | if (ssl_check_ca_name(ca_dn, x)) | |
2319 | rv |= CERT_PKEY_ISSUER_NAME; | |
2320 | } | |
2321 | if (!(rv & CERT_PKEY_ISSUER_NAME)) { | |
2322 | for (i = 0; i < sk_X509_num(chain); i++) { | |
2323 | X509 *xtmp = sk_X509_value(chain, i); | |
2324 | if (ssl_check_ca_name(ca_dn, xtmp)) { | |
2325 | rv |= CERT_PKEY_ISSUER_NAME; | |
2326 | break; | |
2327 | } | |
2328 | } | |
2329 | } | |
2330 | if (!check_flags && !(rv & CERT_PKEY_ISSUER_NAME)) | |
2331 | goto end; | |
2332 | } else | |
2333 | rv |= CERT_PKEY_ISSUER_NAME | CERT_PKEY_CERT_TYPE; | |
2334 | ||
2335 | if (!check_flags || (rv & check_flags) == check_flags) | |
2336 | rv |= CERT_PKEY_VALID; | |
2337 | ||
2338 | end: | |
2339 | ||
a8bb912d DSH |
2340 | if (TLS1_get_version(s) >= TLS1_2_VERSION) |
2341 | rv |= *pvalid & (CERT_PKEY_EXPLICIT_SIGN | CERT_PKEY_SIGN); | |
2342 | else | |
0f113f3e MC |
2343 | rv |= CERT_PKEY_SIGN | CERT_PKEY_EXPLICIT_SIGN; |
2344 | ||
2345 | /* | |
2346 | * When checking a CERT_PKEY structure all flags are irrelevant if the | |
2347 | * chain is invalid. | |
2348 | */ | |
2349 | if (!check_flags) { | |
a8bb912d | 2350 | if (rv & CERT_PKEY_VALID) { |
6383d316 | 2351 | *pvalid = rv; |
a8bb912d DSH |
2352 | } else { |
2353 | /* Preserve sign and explicit sign flag, clear rest */ | |
2354 | *pvalid &= CERT_PKEY_EXPLICIT_SIGN | CERT_PKEY_SIGN; | |
0f113f3e MC |
2355 | return 0; |
2356 | } | |
2357 | } | |
2358 | return rv; | |
2359 | } | |
d61ff83b DSH |
2360 | |
2361 | /* Set validity of certificates in an SSL structure */ | |
2362 | void tls1_set_cert_validity(SSL *s) | |
0f113f3e | 2363 | { |
d0ff28f8 | 2364 | tls1_check_chain(s, NULL, NULL, NULL, SSL_PKEY_RSA); |
045d078a | 2365 | tls1_check_chain(s, NULL, NULL, NULL, SSL_PKEY_RSA_PSS_SIGN); |
17dd65e6 | 2366 | tls1_check_chain(s, NULL, NULL, NULL, SSL_PKEY_DSA_SIGN); |
17dd65e6 | 2367 | tls1_check_chain(s, NULL, NULL, NULL, SSL_PKEY_ECC); |
e44380a9 DB |
2368 | tls1_check_chain(s, NULL, NULL, NULL, SSL_PKEY_GOST01); |
2369 | tls1_check_chain(s, NULL, NULL, NULL, SSL_PKEY_GOST12_256); | |
2370 | tls1_check_chain(s, NULL, NULL, NULL, SSL_PKEY_GOST12_512); | |
3d234c9e | 2371 | tls1_check_chain(s, NULL, NULL, NULL, SSL_PKEY_ED25519); |
0e1d6ecf | 2372 | tls1_check_chain(s, NULL, NULL, NULL, SSL_PKEY_ED448); |
0f113f3e MC |
2373 | } |
2374 | ||
69687aa8 | 2375 | /* User level utility function to check a chain is suitable */ |
18d71588 | 2376 | int SSL_check_chain(SSL *s, X509 *x, EVP_PKEY *pk, STACK_OF(X509) *chain) |
0f113f3e MC |
2377 | { |
2378 | return tls1_check_chain(s, x, pk, chain, -1); | |
2379 | } | |
d61ff83b | 2380 | |
09599b52 DSH |
2381 | #ifndef OPENSSL_NO_DH |
2382 | DH *ssl_get_auto_dh(SSL *s) | |
0f113f3e MC |
2383 | { |
2384 | int dh_secbits = 80; | |
2385 | if (s->cert->dh_tmp_auto == 2) | |
2386 | return DH_get_1024_160(); | |
adc5506a | 2387 | if (s->s3->tmp.new_cipher->algorithm_auth & (SSL_aNULL | SSL_aPSK)) { |
0f113f3e MC |
2388 | if (s->s3->tmp.new_cipher->strength_bits == 256) |
2389 | dh_secbits = 128; | |
2390 | else | |
2391 | dh_secbits = 80; | |
2392 | } else { | |
a497cf25 | 2393 | if (s->s3->tmp.cert == NULL) |
f365a3e2 | 2394 | return NULL; |
a497cf25 | 2395 | dh_secbits = EVP_PKEY_security_bits(s->s3->tmp.cert->privatekey); |
0f113f3e MC |
2396 | } |
2397 | ||
2398 | if (dh_secbits >= 128) { | |
2399 | DH *dhp = DH_new(); | |
0aeddcfa | 2400 | BIGNUM *p, *g; |
a71edf3b | 2401 | if (dhp == NULL) |
0f113f3e | 2402 | return NULL; |
0aeddcfa | 2403 | g = BN_new(); |
8eab767a P |
2404 | if (g == NULL || !BN_set_word(g, 2)) { |
2405 | DH_free(dhp); | |
2406 | BN_free(g); | |
2407 | return NULL; | |
2408 | } | |
0f113f3e | 2409 | if (dh_secbits >= 192) |
9021a5df | 2410 | p = BN_get_rfc3526_prime_8192(NULL); |
0f113f3e | 2411 | else |
9021a5df | 2412 | p = BN_get_rfc3526_prime_3072(NULL); |
8eab767a | 2413 | if (p == NULL || !DH_set0_pqg(dhp, p, NULL, g)) { |
0f113f3e | 2414 | DH_free(dhp); |
0aeddcfa MC |
2415 | BN_free(p); |
2416 | BN_free(g); | |
0f113f3e MC |
2417 | return NULL; |
2418 | } | |
2419 | return dhp; | |
2420 | } | |
2421 | if (dh_secbits >= 112) | |
2422 | return DH_get_2048_224(); | |
2423 | return DH_get_1024_160(); | |
2424 | } | |
09599b52 | 2425 | #endif |
b362ccab DSH |
2426 | |
2427 | static int ssl_security_cert_key(SSL *s, SSL_CTX *ctx, X509 *x, int op) | |
0f113f3e | 2428 | { |
72245f34 | 2429 | int secbits = -1; |
8382fd3a | 2430 | EVP_PKEY *pkey = X509_get0_pubkey(x); |
0f113f3e | 2431 | if (pkey) { |
72245f34 DSH |
2432 | /* |
2433 | * If no parameters this will return -1 and fail using the default | |
2434 | * security callback for any non-zero security level. This will | |
2435 | * reject keys which omit parameters but this only affects DSA and | |
2436 | * omission of parameters is never (?) done in practice. | |
2437 | */ | |
0f113f3e | 2438 | secbits = EVP_PKEY_security_bits(pkey); |
72245f34 | 2439 | } |
0f113f3e MC |
2440 | if (s) |
2441 | return ssl_security(s, op, secbits, 0, x); | |
2442 | else | |
2443 | return ssl_ctx_security(ctx, op, secbits, 0, x); | |
2444 | } | |
b362ccab DSH |
2445 | |
2446 | static int ssl_security_cert_sig(SSL *s, SSL_CTX *ctx, X509 *x, int op) | |
0f113f3e MC |
2447 | { |
2448 | /* Lookup signature algorithm digest */ | |
65e89736 | 2449 | int secbits, nid, pknid; |
221c7b55 DSH |
2450 | /* Don't check signature if self signed */ |
2451 | if ((X509_get_extension_flags(x) & EXFLAG_SS) != 0) | |
2452 | return 1; | |
65e89736 DSH |
2453 | if (!X509_get_signature_info(x, &nid, &pknid, &secbits, NULL)) |
2454 | secbits = -1; | |
2455 | /* If digest NID not defined use signature NID */ | |
2456 | if (nid == NID_undef) | |
2457 | nid = pknid; | |
0f113f3e | 2458 | if (s) |
65e89736 | 2459 | return ssl_security(s, op, secbits, nid, x); |
0f113f3e | 2460 | else |
65e89736 | 2461 | return ssl_ctx_security(ctx, op, secbits, nid, x); |
0f113f3e | 2462 | } |
b362ccab DSH |
2463 | |
2464 | int ssl_security_cert(SSL *s, SSL_CTX *ctx, X509 *x, int vfy, int is_ee) | |
0f113f3e MC |
2465 | { |
2466 | if (vfy) | |
2467 | vfy = SSL_SECOP_PEER; | |
2468 | if (is_ee) { | |
2469 | if (!ssl_security_cert_key(s, ctx, x, SSL_SECOP_EE_KEY | vfy)) | |
2470 | return SSL_R_EE_KEY_TOO_SMALL; | |
2471 | } else { | |
2472 | if (!ssl_security_cert_key(s, ctx, x, SSL_SECOP_CA_KEY | vfy)) | |
2473 | return SSL_R_CA_KEY_TOO_SMALL; | |
2474 | } | |
2475 | if (!ssl_security_cert_sig(s, ctx, x, SSL_SECOP_CA_MD | vfy)) | |
2476 | return SSL_R_CA_MD_TOO_WEAK; | |
2477 | return 1; | |
2478 | } | |
2479 | ||
2480 | /* | |
69687aa8 F |
2481 | * Check security of a chain, if |sk| includes the end entity certificate then |
2482 | * |x| is NULL. If |vfy| is 1 then we are verifying a peer chain and not sending | |
0f113f3e | 2483 | * one to the peer. Return values: 1 if ok otherwise error code to use |
b362ccab DSH |
2484 | */ |
2485 | ||
2486 | int ssl_security_cert_chain(SSL *s, STACK_OF(X509) *sk, X509 *x, int vfy) | |
0f113f3e MC |
2487 | { |
2488 | int rv, start_idx, i; | |
2489 | if (x == NULL) { | |
2490 | x = sk_X509_value(sk, 0); | |
2491 | start_idx = 1; | |
2492 | } else | |
2493 | start_idx = 0; | |
2494 | ||
2495 | rv = ssl_security_cert(s, NULL, x, vfy, 1); | |
2496 | if (rv != 1) | |
2497 | return rv; | |
2498 | ||
2499 | for (i = start_idx; i < sk_X509_num(sk); i++) { | |
2500 | x = sk_X509_value(sk, i); | |
2501 | rv = ssl_security_cert(s, NULL, x, vfy, 0); | |
2502 | if (rv != 1) | |
2503 | return rv; | |
2504 | } | |
2505 | return 1; | |
2506 | } | |
93a77f9e | 2507 | |
7f6b466b DSH |
2508 | /* |
2509 | * For TLS 1.2 servers check if we have a certificate which can be used | |
b46867d7 | 2510 | * with the signature algorithm "lu" and return index of certificate. |
7f6b466b DSH |
2511 | */ |
2512 | ||
b46867d7 | 2513 | static int tls12_get_cert_sigalg_idx(const SSL *s, const SIGALG_LOOKUP *lu) |
7f6b466b | 2514 | { |
b46867d7 DSH |
2515 | int sig_idx = lu->sig_idx; |
2516 | const SSL_CERT_LOOKUP *clu = ssl_cert_lookup_by_idx(sig_idx); | |
7f6b466b DSH |
2517 | |
2518 | /* If not recognised or not supported by cipher mask it is not suitable */ | |
b8fef8ee MC |
2519 | if (clu == NULL |
2520 | || (clu->amask & s->s3->tmp.new_cipher->algorithm_auth) == 0 | |
2521 | || (clu->nid == EVP_PKEY_RSA_PSS | |
2522 | && (s->s3->tmp.new_cipher->algorithm_mkey & SSL_kRSA) != 0)) | |
b46867d7 DSH |
2523 | return -1; |
2524 | ||
b46867d7 | 2525 | return s->s3->tmp.valid_flags[sig_idx] & CERT_PKEY_VALID ? sig_idx : -1; |
7f6b466b DSH |
2526 | } |
2527 | ||
c589c34e BK |
2528 | /* |
2529 | * Returns true if |s| has a usable certificate configured for use | |
2530 | * with signature scheme |sig|. | |
2531 | * "Usable" includes a check for presence as well as applying | |
2532 | * the signature_algorithm_cert restrictions sent by the peer (if any). | |
2533 | * Returns false if no usable certificate is found. | |
2534 | */ | |
2535 | static int has_usable_cert(SSL *s, const SIGALG_LOOKUP *sig, int idx) | |
2536 | { | |
2537 | const SIGALG_LOOKUP *lu; | |
2538 | int mdnid, pknid; | |
2539 | size_t i; | |
2540 | ||
2541 | /* TLS 1.2 callers can override lu->sig_idx, but not TLS 1.3 callers. */ | |
2542 | if (idx == -1) | |
2543 | idx = sig->sig_idx; | |
2544 | if (!ssl_has_cert(s, idx)) | |
2545 | return 0; | |
2546 | if (s->s3->tmp.peer_cert_sigalgs != NULL) { | |
2547 | for (i = 0; i < s->s3->tmp.peer_cert_sigalgslen; i++) { | |
2548 | lu = tls1_lookup_sigalg(s->s3->tmp.peer_cert_sigalgs[i]); | |
2549 | if (lu == NULL | |
2550 | || !X509_get_signature_info(s->cert->pkeys[idx].x509, &mdnid, | |
2551 | &pknid, NULL, NULL)) | |
2552 | continue; | |
2553 | /* | |
2554 | * TODO this does not differentiate between the | |
2555 | * rsa_pss_pss_* and rsa_pss_rsae_* schemes since we do not | |
2556 | * have a chain here that lets us look at the key OID in the | |
2557 | * signing certificate. | |
2558 | */ | |
2559 | if (mdnid == lu->hash && pknid == lu->sig) | |
2560 | return 1; | |
2561 | } | |
2562 | return 0; | |
2563 | } | |
2564 | return 1; | |
2565 | } | |
2566 | ||
93a77f9e DSH |
2567 | /* |
2568 | * Choose an appropriate signature algorithm based on available certificates | |
717a265a DSH |
2569 | * Sets chosen certificate and signature algorithm. |
2570 | * | |
f63a17d6 MC |
2571 | * For servers if we fail to find a required certificate it is a fatal error, |
2572 | * an appropriate error code is set and a TLS alert is sent. | |
717a265a | 2573 | * |
f63a17d6 | 2574 | * For clients fatalerrs is set to 0. If a certificate is not suitable it is not |
717a265a DSH |
2575 | * a fatal error: we will either try another certificate or not present one |
2576 | * to the server. In this case no error is set. | |
93a77f9e | 2577 | */ |
f63a17d6 | 2578 | int tls_choose_sigalg(SSL *s, int fatalerrs) |
93a77f9e | 2579 | { |
0972bc5c | 2580 | const SIGALG_LOOKUP *lu = NULL; |
b46867d7 | 2581 | int sig_idx = -1; |
0972bc5c | 2582 | |
717a265a DSH |
2583 | s->s3->tmp.cert = NULL; |
2584 | s->s3->tmp.sigalg = NULL; | |
2585 | ||
93a77f9e DSH |
2586 | if (SSL_IS_TLS13(s)) { |
2587 | size_t i; | |
21f198ec | 2588 | #ifndef OPENSSL_NO_EC |
7500bc33 | 2589 | int curve = -1; |
21f198ec | 2590 | #endif |
93a77f9e | 2591 | |
69687aa8 | 2592 | /* Look for a certificate matching shared sigalgs */ |
93a77f9e | 2593 | for (i = 0; i < s->cert->shared_sigalgslen; i++) { |
0972bc5c | 2594 | lu = s->cert->shared_sigalgs[i]; |
bcec0b94 | 2595 | sig_idx = -1; |
93a77f9e | 2596 | |
d8311fc9 MC |
2597 | /* Skip SHA1, SHA224, DSA and RSA if not PSS */ |
2598 | if (lu->hash == NID_sha1 | |
2599 | || lu->hash == NID_sha224 | |
2600 | || lu->sig == EVP_PKEY_DSA | |
095a982b | 2601 | || lu->sig == EVP_PKEY_RSA) |
93a77f9e | 2602 | continue; |
c589c34e BK |
2603 | /* Check that we have a cert, and signature_algorithms_cert */ |
2604 | if (!tls1_lookup_md(lu, NULL) || !has_usable_cert(s, lu, -1)) | |
93a77f9e | 2605 | continue; |
93a77f9e | 2606 | if (lu->sig == EVP_PKEY_EC) { |
21f198ec | 2607 | #ifndef OPENSSL_NO_EC |
93a77f9e | 2608 | if (curve == -1) { |
7f6b466b | 2609 | EC_KEY *ec = EVP_PKEY_get0_EC_KEY(s->cert->pkeys[SSL_PKEY_ECC].privatekey); |
93a77f9e DSH |
2610 | |
2611 | curve = EC_GROUP_get_curve_name(EC_KEY_get0_group(ec)); | |
2612 | } | |
7500bc33 | 2613 | if (lu->curve != NID_undef && curve != lu->curve) |
93a77f9e | 2614 | continue; |
21f198ec RL |
2615 | #else |
2616 | continue; | |
2617 | #endif | |
0fe3db25 NR |
2618 | } else if (lu->sig == EVP_PKEY_RSA_PSS) { |
2619 | /* validate that key is large enough for the signature algorithm */ | |
bcec0b94 | 2620 | EVP_PKEY *pkey; |
0fe3db25 | 2621 | |
c589c34e | 2622 | pkey = s->cert->pkeys[lu->sig_idx].privatekey; |
bcec0b94 | 2623 | if (!rsa_pss_check_min_key_size(EVP_PKEY_get0(pkey), lu)) |
0fe3db25 | 2624 | continue; |
93a77f9e | 2625 | } |
0972bc5c DSH |
2626 | break; |
2627 | } | |
2628 | if (i == s->cert->shared_sigalgslen) { | |
f63a17d6 | 2629 | if (!fatalerrs) |
717a265a | 2630 | return 1; |
f63a17d6 MC |
2631 | SSLfatal(s, SSL_AD_HANDSHAKE_FAILURE, SSL_F_TLS_CHOOSE_SIGALG, |
2632 | SSL_R_NO_SUITABLE_SIGNATURE_ALGORITHM); | |
0972bc5c DSH |
2633 | return 0; |
2634 | } | |
2635 | } else { | |
7f6b466b DSH |
2636 | /* If ciphersuite doesn't require a cert nothing to do */ |
2637 | if (!(s->s3->tmp.new_cipher->algorithm_auth & SSL_aCERT)) | |
2638 | return 1; | |
2639 | if (!s->server && !ssl_has_cert(s, s->cert->key - s->cert->pkeys)) | |
717a265a | 2640 | return 1; |
0972bc5c DSH |
2641 | |
2642 | if (SSL_USE_SIGALGS(s)) { | |
c589c34e | 2643 | size_t i; |
0972bc5c | 2644 | if (s->s3->tmp.peer_sigalgs != NULL) { |
599b586d DSH |
2645 | #ifndef OPENSSL_NO_EC |
2646 | int curve; | |
2647 | ||
2648 | /* For Suite B need to match signature algorithm to curve */ | |
2649 | if (tls1_suiteb(s)) { | |
7f6b466b | 2650 | EC_KEY *ec = EVP_PKEY_get0_EC_KEY(s->cert->pkeys[SSL_PKEY_ECC].privatekey); |
599b586d DSH |
2651 | curve = EC_GROUP_get_curve_name(EC_KEY_get0_group(ec)); |
2652 | } else { | |
2653 | curve = -1; | |
2654 | } | |
2655 | #endif | |
0972bc5c DSH |
2656 | |
2657 | /* | |
2658 | * Find highest preference signature algorithm matching | |
2659 | * cert type | |
2660 | */ | |
2661 | for (i = 0; i < s->cert->shared_sigalgslen; i++) { | |
2662 | lu = s->cert->shared_sigalgs[i]; | |
7f6b466b DSH |
2663 | |
2664 | if (s->server) { | |
b46867d7 | 2665 | if ((sig_idx = tls12_get_cert_sigalg_idx(s, lu)) == -1) |
7f6b466b | 2666 | continue; |
b46867d7 DSH |
2667 | } else { |
2668 | int cc_idx = s->cert->key - s->cert->pkeys; | |
2669 | ||
2670 | sig_idx = lu->sig_idx; | |
c589c34e BK |
2671 | if (cc_idx != sig_idx) |
2672 | continue; | |
b2021556 | 2673 | } |
c589c34e BK |
2674 | /* Check that we have a cert, and sig_algs_cert */ |
2675 | if (!has_usable_cert(s, lu, sig_idx)) | |
2676 | continue; | |
0fe3db25 NR |
2677 | if (lu->sig == EVP_PKEY_RSA_PSS) { |
2678 | /* validate that key is large enough for the signature algorithm */ | |
bcec0b94 | 2679 | EVP_PKEY *pkey = s->cert->pkeys[sig_idx].privatekey; |
0fe3db25 | 2680 | |
bcec0b94 | 2681 | if (!rsa_pss_check_min_key_size(EVP_PKEY_get0(pkey), lu)) |
0fe3db25 NR |
2682 | continue; |
2683 | } | |
7f6b466b DSH |
2684 | #ifndef OPENSSL_NO_EC |
2685 | if (curve == -1 || lu->curve == curve) | |
599b586d | 2686 | #endif |
0972bc5c DSH |
2687 | break; |
2688 | } | |
2689 | if (i == s->cert->shared_sigalgslen) { | |
f63a17d6 | 2690 | if (!fatalerrs) |
717a265a | 2691 | return 1; |
b8fef8ee MC |
2692 | SSLfatal(s, SSL_AD_HANDSHAKE_FAILURE, |
2693 | SSL_F_TLS_CHOOSE_SIGALG, | |
2694 | SSL_R_NO_SUITABLE_SIGNATURE_ALGORITHM); | |
0972bc5c DSH |
2695 | return 0; |
2696 | } | |
2697 | } else { | |
2698 | /* | |
2699 | * If we have no sigalg use defaults | |
2700 | */ | |
2701 | const uint16_t *sent_sigs; | |
c589c34e | 2702 | size_t sent_sigslen; |
0972bc5c | 2703 | |
7f6b466b | 2704 | if ((lu = tls1_get_legacy_sigalg(s, -1)) == NULL) { |
f63a17d6 | 2705 | if (!fatalerrs) |
717a265a | 2706 | return 1; |
f63a17d6 MC |
2707 | SSLfatal(s, SSL_AD_INTERNAL_ERROR, SSL_F_TLS_CHOOSE_SIGALG, |
2708 | ERR_R_INTERNAL_ERROR); | |
0972bc5c DSH |
2709 | return 0; |
2710 | } | |
2711 | ||
2712 | /* Check signature matches a type we sent */ | |
2713 | sent_sigslen = tls12_get_psigalgs(s, 1, &sent_sigs); | |
2714 | for (i = 0; i < sent_sigslen; i++, sent_sigs++) { | |
c589c34e BK |
2715 | if (lu->sigalg == *sent_sigs |
2716 | && has_usable_cert(s, lu, lu->sig_idx)) | |
0972bc5c DSH |
2717 | break; |
2718 | } | |
2719 | if (i == sent_sigslen) { | |
f63a17d6 | 2720 | if (!fatalerrs) |
717a265a | 2721 | return 1; |
f63a17d6 MC |
2722 | SSLfatal(s, SSL_AD_ILLEGAL_PARAMETER, |
2723 | SSL_F_TLS_CHOOSE_SIGALG, | |
2724 | SSL_R_WRONG_SIGNATURE_TYPE); | |
0972bc5c DSH |
2725 | return 0; |
2726 | } | |
2727 | } | |
2728 | } else { | |
7f6b466b | 2729 | if ((lu = tls1_get_legacy_sigalg(s, -1)) == NULL) { |
f63a17d6 | 2730 | if (!fatalerrs) |
717a265a | 2731 | return 1; |
f63a17d6 MC |
2732 | SSLfatal(s, SSL_AD_INTERNAL_ERROR, SSL_F_TLS_CHOOSE_SIGALG, |
2733 | ERR_R_INTERNAL_ERROR); | |
0972bc5c DSH |
2734 | return 0; |
2735 | } | |
2736 | } | |
93a77f9e | 2737 | } |
b46867d7 DSH |
2738 | if (sig_idx == -1) |
2739 | sig_idx = lu->sig_idx; | |
2740 | s->s3->tmp.cert = &s->cert->pkeys[sig_idx]; | |
59088e43 | 2741 | s->cert->key = s->s3->tmp.cert; |
0972bc5c | 2742 | s->s3->tmp.sigalg = lu; |
93a77f9e DSH |
2743 | return 1; |
2744 | } | |
cf72c757 F |
2745 | |
2746 | int SSL_CTX_set_tlsext_max_fragment_length(SSL_CTX *ctx, uint8_t mode) | |
2747 | { | |
2748 | if (mode != TLSEXT_max_fragment_length_DISABLED | |
2749 | && !IS_MAX_FRAGMENT_LENGTH_EXT_VALID(mode)) { | |
2750 | SSLerr(SSL_F_SSL_CTX_SET_TLSEXT_MAX_FRAGMENT_LENGTH, | |
2751 | SSL_R_SSL3_EXT_INVALID_MAX_FRAGMENT_LENGTH); | |
2752 | return 0; | |
2753 | } | |
2754 | ||
2755 | ctx->ext.max_fragment_len_mode = mode; | |
2756 | return 1; | |
2757 | } | |
2758 | ||
2759 | int SSL_set_tlsext_max_fragment_length(SSL *ssl, uint8_t mode) | |
2760 | { | |
2761 | if (mode != TLSEXT_max_fragment_length_DISABLED | |
2762 | && !IS_MAX_FRAGMENT_LENGTH_EXT_VALID(mode)) { | |
2763 | SSLerr(SSL_F_SSL_SET_TLSEXT_MAX_FRAGMENT_LENGTH, | |
2764 | SSL_R_SSL3_EXT_INVALID_MAX_FRAGMENT_LENGTH); | |
2765 | return 0; | |
2766 | } | |
2767 | ||
2768 | ssl->ext.max_fragment_len_mode = mode; | |
2769 | return 1; | |
2770 | } | |
2771 | ||
2772 | uint8_t SSL_SESSION_get_max_fragment_length(const SSL_SESSION *session) | |
2773 | { | |
2774 | return session->ext.max_fragment_len_mode; | |
2775 | } |