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Commit | Line | Data |
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846e33c7 | 1 | /* |
3c7d0945 | 2 | * Copyright 1995-2018 The OpenSSL Project Authors. All Rights Reserved. |
f1fd4544 | 3 | * |
2c18d164 | 4 | * Licensed under the Apache License 2.0 (the "License"). You may not use |
846e33c7 RS |
5 | * this file except in compliance with the License. You can obtain a copy |
6 | * in the file LICENSE in the source distribution or at | |
7 | * https://www.openssl.org/source/license.html | |
f1fd4544 | 8 | */ |
58964a49 | 9 | |
a76ce286 P |
10 | /* We need access to the deprecated low level HMAC APIs */ |
11 | #define OPENSSL_SUPPRESS_DEPRECATED | |
12 | ||
58964a49 | 13 | #include <stdio.h> |
aa474d1f | 14 | #include <stdlib.h> |
ec577822 | 15 | #include <openssl/objects.h> |
6434abbf DSH |
16 | #include <openssl/evp.h> |
17 | #include <openssl/hmac.h> | |
a76ce286 | 18 | #include <openssl/core_names.h> |
67c8e7f4 | 19 | #include <openssl/ocsp.h> |
5951e840 MC |
20 | #include <openssl/conf.h> |
21 | #include <openssl/x509v3.h> | |
3c27208f RS |
22 | #include <openssl/dh.h> |
23 | #include <openssl/bn.h> | |
677963e5 | 24 | #include "internal/nelem.h" |
c2041da8 | 25 | #include "internal/evp.h" |
706457b7 | 26 | #include "ssl_local.h" |
3c27208f | 27 | #include <openssl/ct.h> |
58964a49 | 28 | |
5235ef44 | 29 | static const SIGALG_LOOKUP *find_sig_alg(SSL *s, X509 *x, EVP_PKEY *pkey); |
b0031e5d | 30 | static int tls12_sigalg_allowed(const SSL *s, int op, const SIGALG_LOOKUP *lu); |
5235ef44 | 31 | |
0f113f3e MC |
32 | SSL3_ENC_METHOD const TLSv1_enc_data = { |
33 | tls1_enc, | |
34 | tls1_mac, | |
35 | tls1_setup_key_block, | |
36 | tls1_generate_master_secret, | |
37 | tls1_change_cipher_state, | |
38 | tls1_final_finish_mac, | |
0f113f3e MC |
39 | TLS_MD_CLIENT_FINISH_CONST, TLS_MD_CLIENT_FINISH_CONST_SIZE, |
40 | TLS_MD_SERVER_FINISH_CONST, TLS_MD_SERVER_FINISH_CONST_SIZE, | |
41 | tls1_alert_code, | |
42 | tls1_export_keying_material, | |
43 | 0, | |
a29fa98c | 44 | ssl3_set_handshake_header, |
2c7b4dbc | 45 | tls_close_construct_packet, |
0f113f3e MC |
46 | ssl3_handshake_write |
47 | }; | |
48 | ||
49 | SSL3_ENC_METHOD const TLSv1_1_enc_data = { | |
50 | tls1_enc, | |
51 | tls1_mac, | |
52 | tls1_setup_key_block, | |
53 | tls1_generate_master_secret, | |
54 | tls1_change_cipher_state, | |
55 | tls1_final_finish_mac, | |
0f113f3e MC |
56 | TLS_MD_CLIENT_FINISH_CONST, TLS_MD_CLIENT_FINISH_CONST_SIZE, |
57 | TLS_MD_SERVER_FINISH_CONST, TLS_MD_SERVER_FINISH_CONST_SIZE, | |
58 | tls1_alert_code, | |
59 | tls1_export_keying_material, | |
60 | SSL_ENC_FLAG_EXPLICIT_IV, | |
a29fa98c | 61 | ssl3_set_handshake_header, |
2c7b4dbc | 62 | tls_close_construct_packet, |
0f113f3e MC |
63 | ssl3_handshake_write |
64 | }; | |
65 | ||
66 | SSL3_ENC_METHOD const TLSv1_2_enc_data = { | |
67 | tls1_enc, | |
68 | tls1_mac, | |
69 | tls1_setup_key_block, | |
70 | tls1_generate_master_secret, | |
71 | tls1_change_cipher_state, | |
72 | tls1_final_finish_mac, | |
0f113f3e MC |
73 | TLS_MD_CLIENT_FINISH_CONST, TLS_MD_CLIENT_FINISH_CONST_SIZE, |
74 | TLS_MD_SERVER_FINISH_CONST, TLS_MD_SERVER_FINISH_CONST_SIZE, | |
75 | tls1_alert_code, | |
76 | tls1_export_keying_material, | |
77 | SSL_ENC_FLAG_EXPLICIT_IV | SSL_ENC_FLAG_SIGALGS | SSL_ENC_FLAG_SHA256_PRF | |
78 | | SSL_ENC_FLAG_TLS1_2_CIPHERS, | |
a29fa98c | 79 | ssl3_set_handshake_header, |
2c7b4dbc | 80 | tls_close_construct_packet, |
0f113f3e MC |
81 | ssl3_handshake_write |
82 | }; | |
58964a49 | 83 | |
582a17d6 | 84 | SSL3_ENC_METHOD const TLSv1_3_enc_data = { |
bebc0c7d | 85 | tls13_enc, |
582a17d6 | 86 | tls1_mac, |
92760c21 MC |
87 | tls13_setup_key_block, |
88 | tls13_generate_master_secret, | |
89 | tls13_change_cipher_state, | |
90 | tls13_final_finish_mac, | |
582a17d6 MC |
91 | TLS_MD_CLIENT_FINISH_CONST, TLS_MD_CLIENT_FINISH_CONST_SIZE, |
92 | TLS_MD_SERVER_FINISH_CONST, TLS_MD_SERVER_FINISH_CONST_SIZE, | |
04904312 | 93 | tls13_alert_code, |
0ca8d1ec | 94 | tls13_export_keying_material, |
bebc0c7d | 95 | SSL_ENC_FLAG_SIGALGS | SSL_ENC_FLAG_SHA256_PRF, |
582a17d6 MC |
96 | ssl3_set_handshake_header, |
97 | tls_close_construct_packet, | |
98 | ssl3_handshake_write | |
99 | }; | |
100 | ||
f3b656b2 | 101 | long tls1_default_timeout(void) |
0f113f3e MC |
102 | { |
103 | /* | |
104 | * 2 hours, the 24 hours mentioned in the TLSv1 spec is way too long for | |
105 | * http, the cache would over fill | |
106 | */ | |
107 | return (60 * 60 * 2); | |
108 | } | |
58964a49 | 109 | |
6b691a5c | 110 | int tls1_new(SSL *s) |
0f113f3e MC |
111 | { |
112 | if (!ssl3_new(s)) | |
b77f3ed1 MC |
113 | return 0; |
114 | if (!s->method->ssl_clear(s)) | |
115 | return 0; | |
116 | ||
117 | return 1; | |
0f113f3e | 118 | } |
58964a49 | 119 | |
6b691a5c | 120 | void tls1_free(SSL *s) |
0f113f3e | 121 | { |
aff8c126 | 122 | OPENSSL_free(s->ext.session_ticket); |
0f113f3e MC |
123 | ssl3_free(s); |
124 | } | |
58964a49 | 125 | |
b77f3ed1 | 126 | int tls1_clear(SSL *s) |
0f113f3e | 127 | { |
b77f3ed1 MC |
128 | if (!ssl3_clear(s)) |
129 | return 0; | |
130 | ||
4fa52141 | 131 | if (s->method->version == TLS_ANY_VERSION) |
5c587fb6 | 132 | s->version = TLS_MAX_VERSION_INTERNAL; |
4fa52141 VD |
133 | else |
134 | s->version = s->method->version; | |
b77f3ed1 MC |
135 | |
136 | return 1; | |
0f113f3e | 137 | } |
58964a49 | 138 | |
2dc1aeed | 139 | /* |
dbc6268f | 140 | * Table of group information. |
2dc1aeed | 141 | */ |
65dc5c3c | 142 | #if !defined(OPENSSL_NO_DH) || !defined(OPENSSL_NO_EC) |
0e464d9d | 143 | static const TLS_GROUP_INFO nid_list[] = { |
65dc5c3c | 144 | # ifndef OPENSSL_NO_EC |
9aaecbfc | 145 | {NID_sect163k1, 80, TLS_GROUP_CURVE_CHAR2, 0x0001}, /* sect163k1 (1) */ |
146 | {NID_sect163r1, 80, TLS_GROUP_CURVE_CHAR2, 0x0002}, /* sect163r1 (2) */ | |
147 | {NID_sect163r2, 80, TLS_GROUP_CURVE_CHAR2, 0x0003}, /* sect163r2 (3) */ | |
148 | {NID_sect193r1, 80, TLS_GROUP_CURVE_CHAR2, 0x0004}, /* sect193r1 (4) */ | |
149 | {NID_sect193r2, 80, TLS_GROUP_CURVE_CHAR2, 0x0005}, /* sect193r2 (5) */ | |
150 | {NID_sect233k1, 112, TLS_GROUP_CURVE_CHAR2, 0x0006}, /* sect233k1 (6) */ | |
151 | {NID_sect233r1, 112, TLS_GROUP_CURVE_CHAR2, 0x0007}, /* sect233r1 (7) */ | |
152 | {NID_sect239k1, 112, TLS_GROUP_CURVE_CHAR2, 0x0008}, /* sect239k1 (8) */ | |
153 | {NID_sect283k1, 128, TLS_GROUP_CURVE_CHAR2, 0x0009}, /* sect283k1 (9) */ | |
154 | {NID_sect283r1, 128, TLS_GROUP_CURVE_CHAR2, 0x000A}, /* sect283r1 (10) */ | |
155 | {NID_sect409k1, 192, TLS_GROUP_CURVE_CHAR2, 0x000B}, /* sect409k1 (11) */ | |
156 | {NID_sect409r1, 192, TLS_GROUP_CURVE_CHAR2, 0x000C}, /* sect409r1 (12) */ | |
157 | {NID_sect571k1, 256, TLS_GROUP_CURVE_CHAR2, 0x000D}, /* sect571k1 (13) */ | |
158 | {NID_sect571r1, 256, TLS_GROUP_CURVE_CHAR2, 0x000E}, /* sect571r1 (14) */ | |
159 | {NID_secp160k1, 80, TLS_GROUP_CURVE_PRIME, 0x000F}, /* secp160k1 (15) */ | |
160 | {NID_secp160r1, 80, TLS_GROUP_CURVE_PRIME, 0x0010}, /* secp160r1 (16) */ | |
161 | {NID_secp160r2, 80, TLS_GROUP_CURVE_PRIME, 0x0011}, /* secp160r2 (17) */ | |
162 | {NID_secp192k1, 80, TLS_GROUP_CURVE_PRIME, 0x0012}, /* secp192k1 (18) */ | |
163 | {NID_X9_62_prime192v1, 80, TLS_GROUP_CURVE_PRIME, 0x0013}, /* secp192r1 (19) */ | |
164 | {NID_secp224k1, 112, TLS_GROUP_CURVE_PRIME, 0x0014}, /* secp224k1 (20) */ | |
165 | {NID_secp224r1, 112, TLS_GROUP_CURVE_PRIME, 0x0015}, /* secp224r1 (21) */ | |
166 | {NID_secp256k1, 128, TLS_GROUP_CURVE_PRIME, 0x0016}, /* secp256k1 (22) */ | |
167 | {NID_X9_62_prime256v1, 128, TLS_GROUP_CURVE_PRIME, 0x0017}, /* secp256r1 (23) */ | |
168 | {NID_secp384r1, 192, TLS_GROUP_CURVE_PRIME, 0x0018}, /* secp384r1 (24) */ | |
169 | {NID_secp521r1, 256, TLS_GROUP_CURVE_PRIME, 0x0019}, /* secp521r1 (25) */ | |
170 | {NID_brainpoolP256r1, 128, TLS_GROUP_CURVE_PRIME, 0x001A}, /* brainpoolP256r1 (26) */ | |
171 | {NID_brainpoolP384r1, 192, TLS_GROUP_CURVE_PRIME, 0x001B}, /* brainpoolP384r1 (27) */ | |
172 | {NID_brainpoolP512r1, 256, TLS_GROUP_CURVE_PRIME, 0x001C}, /* brainpool512r1 (28) */ | |
173 | {EVP_PKEY_X25519, 128, TLS_GROUP_CURVE_CUSTOM, 0x001D}, /* X25519 (29) */ | |
174 | {EVP_PKEY_X448, 224, TLS_GROUP_CURVE_CUSTOM, 0x001E}, /* X448 (30) */ | |
65dc5c3c MC |
175 | # endif /* OPENSSL_NO_EC */ |
176 | # ifndef OPENSSL_NO_DH | |
9aaecbfc | 177 | /* Security bit values for FFDHE groups are updated as per RFC 7919 */ |
178 | {NID_ffdhe2048, 103, TLS_GROUP_FFDHE_FOR_TLS1_3, 0x0100}, /* ffdhe2048 (0x0100) */ | |
179 | {NID_ffdhe3072, 125, TLS_GROUP_FFDHE_FOR_TLS1_3, 0x0101}, /* ffdhe3072 (0x0101) */ | |
180 | {NID_ffdhe4096, 150, TLS_GROUP_FFDHE_FOR_TLS1_3, 0x0102}, /* ffdhe4096 (0x0102) */ | |
181 | {NID_ffdhe6144, 175, TLS_GROUP_FFDHE_FOR_TLS1_3, 0x0103}, /* ffdhe6144 (0x0103) */ | |
182 | {NID_ffdhe8192, 192, TLS_GROUP_FFDHE_FOR_TLS1_3, 0x0104}, /* ffdhe8192 (0x0104) */ | |
65dc5c3c | 183 | # endif /* OPENSSL_NO_DH */ |
0f113f3e | 184 | }; |
65dc5c3c | 185 | #endif |
0f113f3e | 186 | |
dbc6268f | 187 | #ifndef OPENSSL_NO_EC |
0f113f3e MC |
188 | static const unsigned char ecformats_default[] = { |
189 | TLSEXT_ECPOINTFORMAT_uncompressed, | |
190 | TLSEXT_ECPOINTFORMAT_ansiX962_compressed_prime, | |
191 | TLSEXT_ECPOINTFORMAT_ansiX962_compressed_char2 | |
192 | }; | |
65dc5c3c | 193 | #endif /* !defined(OPENSSL_NO_EC) || !defined(OPENSSL_NO_DH) */ |
0f113f3e | 194 | |
fe6ef247 | 195 | /* The default curves */ |
65dc5c3c | 196 | #if !defined(OPENSSL_NO_DH) || !defined(OPENSSL_NO_EC) |
9aaecbfc | 197 | static const uint16_t supported_groups_default[] = { |
65dc5c3c | 198 | # ifndef OPENSSL_NO_EC |
9e84a42d DSH |
199 | 29, /* X25519 (29) */ |
200 | 23, /* secp256r1 (23) */ | |
0e1d6ecf | 201 | 30, /* X448 (30) */ |
9e84a42d DSH |
202 | 25, /* secp521r1 (25) */ |
203 | 24, /* secp384r1 (24) */ | |
65dc5c3c MC |
204 | # endif |
205 | # ifndef OPENSSL_NO_DH | |
9aaecbfc | 206 | 0x100, /* ffdhe2048 (0x100) */ |
207 | 0x101, /* ffdhe3072 (0x101) */ | |
208 | 0x102, /* ffdhe4096 (0x102) */ | |
209 | 0x103, /* ffdhe6144 (0x103) */ | |
210 | 0x104, /* ffdhe8192 (0x104) */ | |
65dc5c3c | 211 | # endif |
de57d237 | 212 | }; |
65dc5c3c | 213 | #endif /* !defined(OPENSSL_NO_EC) || !defined(OPENSSL_NO_DH) */ |
de57d237 | 214 | |
dbc6268f | 215 | #ifndef OPENSSL_NO_EC |
9e84a42d DSH |
216 | static const uint16_t suiteb_curves[] = { |
217 | TLSEXT_curve_P_256, | |
218 | TLSEXT_curve_P_384 | |
0f113f3e | 219 | }; |
dbc6268f | 220 | #endif |
2ea80354 | 221 | |
f48d826e | 222 | const TLS_GROUP_INFO *tls1_group_id_lookup(uint16_t group_id) |
0f113f3e | 223 | { |
65dc5c3c | 224 | #if !defined(OPENSSL_NO_DH) || !defined(OPENSSL_NO_EC) |
9aaecbfc | 225 | size_t i; |
226 | ||
227 | /* ECC curves from RFC 4492 and RFC 7027 FFDHE group from RFC 8446 */ | |
228 | for (i = 0; i < OSSL_NELEM(nid_list); i++) { | |
229 | if (nid_list[i].group_id == group_id) | |
230 | return &nid_list[i]; | |
231 | } | |
65dc5c3c | 232 | #endif /* !defined(OPENSSL_NO_DH) || !defined(OPENSSL_NO_EC) */ |
9aaecbfc | 233 | return NULL; |
0f113f3e | 234 | } |
525de5d3 | 235 | |
65dc5c3c | 236 | #if !defined(OPENSSL_NO_DH) || !defined(OPENSSL_NO_EC) |
84d4b9e3 | 237 | int tls1_group_id2nid(uint16_t group_id) |
238 | { | |
239 | const TLS_GROUP_INFO *ginf = tls1_group_id_lookup(group_id); | |
240 | ||
241 | return ginf == NULL ? NID_undef : ginf->nid; | |
242 | } | |
243 | ||
4a1b4280 | 244 | static uint16_t tls1_nid2group_id(int nid) |
0f113f3e | 245 | { |
2fa2d15a | 246 | size_t i; |
9aaecbfc | 247 | |
2fa2d15a DSH |
248 | for (i = 0; i < OSSL_NELEM(nid_list); i++) { |
249 | if (nid_list[i].nid == nid) | |
9aaecbfc | 250 | return nid_list[i].group_id; |
0f113f3e | 251 | } |
2fa2d15a | 252 | return 0; |
0f113f3e | 253 | } |
65dc5c3c | 254 | #endif /* !defined(OPENSSL_NO_EC) || !defined(OPENSSL_NO_DH) */ |
0f113f3e | 255 | |
740580c2 | 256 | /* |
ff6d20a6 DSH |
257 | * Set *pgroups to the supported groups list and *pgroupslen to |
258 | * the number of groups supported. | |
fd2b65ce | 259 | */ |
ff6d20a6 DSH |
260 | void tls1_get_supported_groups(SSL *s, const uint16_t **pgroups, |
261 | size_t *pgroupslen) | |
0f113f3e | 262 | { |
65dc5c3c | 263 | #if !defined(OPENSSL_NO_EC) || !defined(OPENSSL_NO_DH) |
34e5292c DSH |
264 | /* For Suite B mode only include P-256, P-384 */ |
265 | switch (tls1_suiteb(s)) { | |
65dc5c3c | 266 | # ifndef OPENSSL_NO_EC |
34e5292c | 267 | case SSL_CERT_FLAG_SUITEB_128_LOS: |
ff6d20a6 DSH |
268 | *pgroups = suiteb_curves; |
269 | *pgroupslen = OSSL_NELEM(suiteb_curves); | |
34e5292c DSH |
270 | break; |
271 | ||
272 | case SSL_CERT_FLAG_SUITEB_128_LOS_ONLY: | |
ff6d20a6 DSH |
273 | *pgroups = suiteb_curves; |
274 | *pgroupslen = 1; | |
34e5292c DSH |
275 | break; |
276 | ||
277 | case SSL_CERT_FLAG_SUITEB_192_LOS: | |
ff6d20a6 DSH |
278 | *pgroups = suiteb_curves + 1; |
279 | *pgroupslen = 1; | |
34e5292c | 280 | break; |
65dc5c3c | 281 | # endif |
34e5292c DSH |
282 | |
283 | default: | |
284 | if (s->ext.supportedgroups == NULL) { | |
9aaecbfc | 285 | *pgroups = supported_groups_default; |
286 | *pgroupslen = OSSL_NELEM(supported_groups_default); | |
34e5292c | 287 | } else { |
ff6d20a6 DSH |
288 | *pgroups = s->ext.supportedgroups; |
289 | *pgroupslen = s->ext.supportedgroups_len; | |
0f113f3e | 290 | } |
34e5292c | 291 | break; |
0f113f3e | 292 | } |
65dc5c3c MC |
293 | #else |
294 | *pgroups = NULL; | |
295 | *pgroupslen = 0; | |
296 | #endif /* !defined(OPENSSL_NO_EC) || !defined(OPENSSL_NO_DH) */ | |
0f113f3e | 297 | } |
b362ccab | 298 | |
9aaecbfc | 299 | int tls_valid_group(SSL *s, uint16_t group_id, int version) |
300 | { | |
301 | const TLS_GROUP_INFO *ginfo = tls1_group_id_lookup(group_id); | |
302 | ||
303 | if (version < TLS1_3_VERSION) { | |
304 | if ((ginfo->flags & TLS_GROUP_ONLY_FOR_TLS1_3) != 0) | |
305 | return 0; | |
306 | } | |
307 | return 1; | |
308 | } | |
309 | ||
dbc6268f MC |
310 | /* See if group is allowed by security callback */ |
311 | int tls_group_allowed(SSL *s, uint16_t group, int op) | |
0f113f3e | 312 | { |
dbc6268f MC |
313 | const TLS_GROUP_INFO *ginfo = tls1_group_id_lookup(group); |
314 | unsigned char gtmp[2]; | |
5ce5f787 | 315 | |
dbc6268f | 316 | if (ginfo == NULL) |
0f113f3e | 317 | return 0; |
dbc6268f MC |
318 | #ifdef OPENSSL_NO_EC2M |
319 | if (ginfo->flags & TLS_GROUP_CURVE_CHAR2) | |
9aaecbfc | 320 | return 0; |
dbc6268f MC |
321 | #endif |
322 | #ifdef OPENSSL_NO_DH | |
323 | if (ginfo->flags & TLS_GROUP_FFDHE) | |
0f113f3e | 324 | return 0; |
dbc6268f MC |
325 | #endif |
326 | gtmp[0] = group >> 8; | |
327 | gtmp[1] = group & 0xff; | |
328 | return ssl_security(s, op, ginfo->secbits, ginfo->nid, (void *)gtmp); | |
0f113f3e | 329 | } |
b362ccab | 330 | |
b50951d3 DSH |
331 | /* Return 1 if "id" is in "list" */ |
332 | static int tls1_in_list(uint16_t id, const uint16_t *list, size_t listlen) | |
333 | { | |
334 | size_t i; | |
335 | for (i = 0; i < listlen; i++) | |
336 | if (list[i] == id) | |
337 | return 1; | |
338 | return 0; | |
339 | } | |
340 | ||
1d97c843 | 341 | /*- |
8841154a | 342 | * For nmatch >= 0, return the id of the |nmatch|th shared group or 0 |
6977e8ee KR |
343 | * if there is no match. |
344 | * For nmatch == -1, return number of matches | |
8841154a | 345 | * For nmatch == -2, return the id of the group to use for |
b50951d3 | 346 | * a tmp key, or 0 if there is no match. |
d0595f17 | 347 | */ |
8841154a | 348 | uint16_t tls1_shared_group(SSL *s, int nmatch) |
0f113f3e | 349 | { |
9e84a42d | 350 | const uint16_t *pref, *supp; |
b50951d3 | 351 | size_t num_pref, num_supp, i; |
0f113f3e | 352 | int k; |
3e373518 | 353 | |
0f113f3e MC |
354 | /* Can't do anything on client side */ |
355 | if (s->server == 0) | |
8841154a | 356 | return 0; |
0f113f3e MC |
357 | if (nmatch == -2) { |
358 | if (tls1_suiteb(s)) { | |
359 | /* | |
360 | * For Suite B ciphersuite determines curve: we already know | |
361 | * these are acceptable due to previous checks. | |
362 | */ | |
555cbb32 | 363 | unsigned long cid = s->s3.tmp.new_cipher->id; |
3e373518 | 364 | |
0f113f3e | 365 | if (cid == TLS1_CK_ECDHE_ECDSA_WITH_AES_128_GCM_SHA256) |
8841154a | 366 | return TLSEXT_curve_P_256; |
0f113f3e | 367 | if (cid == TLS1_CK_ECDHE_ECDSA_WITH_AES_256_GCM_SHA384) |
8841154a | 368 | return TLSEXT_curve_P_384; |
0f113f3e | 369 | /* Should never happen */ |
8841154a | 370 | return 0; |
0f113f3e MC |
371 | } |
372 | /* If not Suite B just return first preference shared curve */ | |
373 | nmatch = 0; | |
374 | } | |
375 | /* | |
ff6d20a6 DSH |
376 | * If server preference set, our groups are the preference order |
377 | * otherwise peer decides. | |
0f113f3e | 378 | */ |
ff6d20a6 DSH |
379 | if (s->options & SSL_OP_CIPHER_SERVER_PREFERENCE) { |
380 | tls1_get_supported_groups(s, &pref, &num_pref); | |
381 | tls1_get_peer_groups(s, &supp, &num_supp); | |
382 | } else { | |
383 | tls1_get_peer_groups(s, &pref, &num_pref); | |
384 | tls1_get_supported_groups(s, &supp, &num_supp); | |
385 | } | |
3c06513f | 386 | |
9e84a42d DSH |
387 | for (k = 0, i = 0; i < num_pref; i++) { |
388 | uint16_t id = pref[i]; | |
3e373518 | 389 | |
b50951d3 | 390 | if (!tls1_in_list(id, supp, num_supp) |
dbc6268f | 391 | || !tls_group_allowed(s, id, SSL_SECOP_CURVE_SHARED)) |
0f113f3e | 392 | continue; |
b50951d3 DSH |
393 | if (nmatch == k) |
394 | return id; | |
395 | k++; | |
0f113f3e MC |
396 | } |
397 | if (nmatch == -1) | |
398 | return k; | |
399 | /* Out of range (nmatch > k). */ | |
8841154a | 400 | return 0; |
0f113f3e | 401 | } |
d0595f17 | 402 | |
9e84a42d | 403 | int tls1_set_groups(uint16_t **pext, size_t *pextlen, |
de4d764e | 404 | int *groups, size_t ngroups) |
0f113f3e | 405 | { |
65dc5c3c | 406 | #if !defined(OPENSSL_NO_EC) || !defined(OPENSSL_NO_DH) |
9e84a42d | 407 | uint16_t *glist; |
0f113f3e MC |
408 | size_t i; |
409 | /* | |
9aaecbfc | 410 | * Bitmap of groups included to detect duplicates: two variables are added |
411 | * to detect duplicates as some values are more than 32. | |
0f113f3e | 412 | */ |
9aaecbfc | 413 | unsigned long *dup_list = NULL; |
414 | unsigned long dup_list_egrp = 0; | |
415 | unsigned long dup_list_dhgrp = 0; | |
cdb10bae | 416 | |
680bd131 MC |
417 | if (ngroups == 0) { |
418 | SSLerr(SSL_F_TLS1_SET_GROUPS, SSL_R_BAD_LENGTH); | |
419 | return 0; | |
420 | } | |
cdb10bae RS |
421 | if ((glist = OPENSSL_malloc(ngroups * sizeof(*glist))) == NULL) { |
422 | SSLerr(SSL_F_TLS1_SET_GROUPS, ERR_R_MALLOC_FAILURE); | |
0f113f3e | 423 | return 0; |
cdb10bae | 424 | } |
9e84a42d | 425 | for (i = 0; i < ngroups; i++) { |
0f113f3e | 426 | unsigned long idmask; |
9e84a42d | 427 | uint16_t id; |
4a1b4280 | 428 | id = tls1_nid2group_id(groups[i]); |
9aaecbfc | 429 | if ((id & 0x00FF) >= (sizeof(unsigned long) * 8)) |
430 | goto err; | |
431 | idmask = 1L << (id & 0x00FF); | |
432 | dup_list = (id < 0x100) ? &dup_list_egrp : &dup_list_dhgrp; | |
433 | if (!id || ((*dup_list) & idmask)) | |
434 | goto err; | |
435 | *dup_list |= idmask; | |
9e84a42d | 436 | glist[i] = id; |
0f113f3e | 437 | } |
b548a1f1 | 438 | OPENSSL_free(*pext); |
de4d764e | 439 | *pext = glist; |
9e84a42d | 440 | *pextlen = ngroups; |
0f113f3e | 441 | return 1; |
9aaecbfc | 442 | err: |
443 | OPENSSL_free(glist); | |
444 | return 0; | |
65dc5c3c MC |
445 | #else |
446 | return 0; | |
447 | #endif /* !defined(OPENSSL_NO_EC) || !defined(OPENSSL_NO_DH) */ | |
0f113f3e MC |
448 | } |
449 | ||
65dc5c3c MC |
450 | #if !defined(OPENSSL_NO_EC) || !defined(OPENSSL_NO_DH) |
451 | # define MAX_GROUPLIST OSSL_NELEM(nid_list) | |
0f113f3e MC |
452 | |
453 | typedef struct { | |
454 | size_t nidcnt; | |
dbc6268f | 455 | int nid_arr[MAX_GROUPLIST]; |
0f113f3e | 456 | } nid_cb_st; |
d0595f17 DSH |
457 | |
458 | static int nid_cb(const char *elem, int len, void *arg) | |
0f113f3e MC |
459 | { |
460 | nid_cb_st *narg = arg; | |
461 | size_t i; | |
dbc6268f | 462 | int nid = NID_undef; |
0f113f3e | 463 | char etmp[20]; |
2747d73c KR |
464 | if (elem == NULL) |
465 | return 0; | |
dbc6268f | 466 | if (narg->nidcnt == MAX_GROUPLIST) |
0f113f3e MC |
467 | return 0; |
468 | if (len > (int)(sizeof(etmp) - 1)) | |
469 | return 0; | |
470 | memcpy(etmp, elem, len); | |
471 | etmp[len] = 0; | |
65dc5c3c | 472 | # ifndef OPENSSL_NO_EC |
0f113f3e | 473 | nid = EC_curve_nist2nid(etmp); |
65dc5c3c | 474 | # endif |
0f113f3e MC |
475 | if (nid == NID_undef) |
476 | nid = OBJ_sn2nid(etmp); | |
477 | if (nid == NID_undef) | |
478 | nid = OBJ_ln2nid(etmp); | |
479 | if (nid == NID_undef) | |
480 | return 0; | |
481 | for (i = 0; i < narg->nidcnt; i++) | |
482 | if (narg->nid_arr[i] == nid) | |
483 | return 0; | |
484 | narg->nid_arr[narg->nidcnt++] = nid; | |
485 | return 1; | |
486 | } | |
65dc5c3c | 487 | #endif /* !defined(OPENSSL_NO_EC) || !defined(OPENSSL_NO_DH) */ |
0f113f3e | 488 | |
de4d764e | 489 | /* Set groups based on a colon separate list */ |
9e84a42d | 490 | int tls1_set_groups_list(uint16_t **pext, size_t *pextlen, const char *str) |
0f113f3e | 491 | { |
65dc5c3c | 492 | #if !defined(OPENSSL_NO_EC) || !defined(OPENSSL_NO_DH) |
0f113f3e MC |
493 | nid_cb_st ncb; |
494 | ncb.nidcnt = 0; | |
495 | if (!CONF_parse_list(str, ':', 1, nid_cb, &ncb)) | |
496 | return 0; | |
497 | if (pext == NULL) | |
498 | return 1; | |
de4d764e | 499 | return tls1_set_groups(pext, pextlen, ncb.nid_arr, ncb.nidcnt); |
65dc5c3c MC |
500 | #else |
501 | return 0; | |
502 | #endif | |
0f113f3e | 503 | } |
b50951d3 | 504 | |
4a1b4280 | 505 | /* Check a group id matches preferences */ |
dcf8b01f | 506 | int tls1_check_group_id(SSL *s, uint16_t group_id, int check_own_groups) |
4a1b4280 DSH |
507 | { |
508 | const uint16_t *groups; | |
b50951d3 | 509 | size_t groups_len; |
4a1b4280 DSH |
510 | |
511 | if (group_id == 0) | |
512 | return 0; | |
513 | ||
6447e818 | 514 | /* Check for Suite B compliance */ |
555cbb32 TS |
515 | if (tls1_suiteb(s) && s->s3.tmp.new_cipher != NULL) { |
516 | unsigned long cid = s->s3.tmp.new_cipher->id; | |
6447e818 DSH |
517 | |
518 | if (cid == TLS1_CK_ECDHE_ECDSA_WITH_AES_128_GCM_SHA256) { | |
519 | if (group_id != TLSEXT_curve_P_256) | |
520 | return 0; | |
521 | } else if (cid == TLS1_CK_ECDHE_ECDSA_WITH_AES_256_GCM_SHA384) { | |
522 | if (group_id != TLSEXT_curve_P_384) | |
523 | return 0; | |
524 | } else { | |
525 | /* Should never happen */ | |
526 | return 0; | |
527 | } | |
528 | } | |
b50951d3 | 529 | |
dcf8b01f MC |
530 | if (check_own_groups) { |
531 | /* Check group is one of our preferences */ | |
532 | tls1_get_supported_groups(s, &groups, &groups_len); | |
533 | if (!tls1_in_list(group_id, groups, groups_len)) | |
534 | return 0; | |
535 | } | |
4a1b4280 | 536 | |
dbc6268f | 537 | if (!tls_group_allowed(s, group_id, SSL_SECOP_CURVE_CHECK)) |
6447e818 DSH |
538 | return 0; |
539 | ||
4a1b4280 DSH |
540 | /* For clients, nothing more to check */ |
541 | if (!s->server) | |
542 | return 1; | |
543 | ||
544 | /* Check group is one of peers preferences */ | |
ff6d20a6 | 545 | tls1_get_peer_groups(s, &groups, &groups_len); |
4a1b4280 DSH |
546 | |
547 | /* | |
548 | * RFC 4492 does not require the supported elliptic curves extension | |
549 | * so if it is not sent we can just choose any curve. | |
550 | * It is invalid to send an empty list in the supported groups | |
551 | * extension, so groups_len == 0 always means no extension. | |
552 | */ | |
553 | if (groups_len == 0) | |
554 | return 1; | |
b50951d3 | 555 | return tls1_in_list(group_id, groups, groups_len); |
0f113f3e | 556 | } |
d61ff83b | 557 | |
dbc6268f | 558 | #ifndef OPENSSL_NO_EC |
7da160b0 MC |
559 | void tls1_get_formatlist(SSL *s, const unsigned char **pformats, |
560 | size_t *num_formats) | |
0f113f3e MC |
561 | { |
562 | /* | |
563 | * If we have a custom point format list use it otherwise use default | |
564 | */ | |
aff8c126 RS |
565 | if (s->ext.ecpointformats) { |
566 | *pformats = s->ext.ecpointformats; | |
567 | *num_formats = s->ext.ecpointformats_len; | |
0f113f3e MC |
568 | } else { |
569 | *pformats = ecformats_default; | |
570 | /* For Suite B we don't support char2 fields */ | |
571 | if (tls1_suiteb(s)) | |
572 | *num_formats = sizeof(ecformats_default) - 1; | |
573 | else | |
574 | *num_formats = sizeof(ecformats_default); | |
575 | } | |
576 | } | |
577 | ||
dbc6268f MC |
578 | /* Check a key is compatible with compression extension */ |
579 | static int tls1_check_pkey_comp(SSL *s, EVP_PKEY *pkey) | |
580 | { | |
581 | const EC_KEY *ec; | |
582 | const EC_GROUP *grp; | |
583 | unsigned char comp_id; | |
584 | size_t i; | |
585 | ||
586 | /* If not an EC key nothing to check */ | |
c2041da8 | 587 | if (!EVP_PKEY_is_a(pkey, "EC")) |
dbc6268f MC |
588 | return 1; |
589 | ec = EVP_PKEY_get0_EC_KEY(pkey); | |
590 | grp = EC_KEY_get0_group(ec); | |
591 | ||
592 | /* Get required compression id */ | |
593 | if (EC_KEY_get_conv_form(ec) == POINT_CONVERSION_UNCOMPRESSED) { | |
594 | comp_id = TLSEXT_ECPOINTFORMAT_uncompressed; | |
595 | } else if (SSL_IS_TLS13(s)) { | |
596 | /* | |
597 | * ec_point_formats extension is not used in TLSv1.3 so we ignore | |
598 | * this check. | |
599 | */ | |
600 | return 1; | |
601 | } else { | |
602 | int field_type = EC_METHOD_get_field_type(EC_GROUP_method_of(grp)); | |
603 | ||
604 | if (field_type == NID_X9_62_prime_field) | |
605 | comp_id = TLSEXT_ECPOINTFORMAT_ansiX962_compressed_prime; | |
606 | else if (field_type == NID_X9_62_characteristic_two_field) | |
607 | comp_id = TLSEXT_ECPOINTFORMAT_ansiX962_compressed_char2; | |
608 | else | |
609 | return 0; | |
610 | } | |
611 | /* | |
612 | * If point formats extension present check it, otherwise everything is | |
613 | * supported (see RFC4492). | |
614 | */ | |
cd0fb43c | 615 | if (s->ext.peer_ecpointformats == NULL) |
dbc6268f MC |
616 | return 1; |
617 | ||
cd0fb43c MC |
618 | for (i = 0; i < s->ext.peer_ecpointformats_len; i++) { |
619 | if (s->ext.peer_ecpointformats[i] == comp_id) | |
dbc6268f MC |
620 | return 1; |
621 | } | |
622 | return 0; | |
623 | } | |
624 | ||
625 | /* Return group id of a key */ | |
626 | static uint16_t tls1_get_group_id(EVP_PKEY *pkey) | |
627 | { | |
c2041da8 | 628 | int curve_nid = evp_pkey_get_EC_KEY_curve_nid(pkey); |
dbc6268f | 629 | |
c2041da8 | 630 | if (curve_nid == NID_undef) |
dbc6268f | 631 | return 0; |
c2041da8 | 632 | return tls1_nid2group_id(curve_nid); |
dbc6268f MC |
633 | } |
634 | ||
0f113f3e MC |
635 | /* |
636 | * Check cert parameters compatible with extensions: currently just checks EC | |
637 | * certificates have compatible curves and compression. | |
d61ff83b | 638 | */ |
9195ddcd | 639 | static int tls1_check_cert_param(SSL *s, X509 *x, int check_ee_md) |
0f113f3e | 640 | { |
4a1b4280 | 641 | uint16_t group_id; |
0f113f3e | 642 | EVP_PKEY *pkey; |
8382fd3a | 643 | pkey = X509_get0_pubkey(x); |
4a1b4280 | 644 | if (pkey == NULL) |
0f113f3e MC |
645 | return 0; |
646 | /* If not EC nothing to do */ | |
c2041da8 | 647 | if (!EVP_PKEY_is_a(pkey, "EC")) |
0f113f3e | 648 | return 1; |
4a1b4280 DSH |
649 | /* Check compression */ |
650 | if (!tls1_check_pkey_comp(s, pkey)) | |
0f113f3e | 651 | return 0; |
4a1b4280 | 652 | group_id = tls1_get_group_id(pkey); |
dcf8b01f MC |
653 | /* |
654 | * For a server we allow the certificate to not be in our list of supported | |
655 | * groups. | |
656 | */ | |
657 | if (!tls1_check_group_id(s, group_id, !s->server)) | |
0f113f3e MC |
658 | return 0; |
659 | /* | |
660 | * Special case for suite B. We *MUST* sign using SHA256+P-256 or | |
9195ddcd | 661 | * SHA384+P-384. |
0f113f3e | 662 | */ |
9195ddcd | 663 | if (check_ee_md && tls1_suiteb(s)) { |
0f113f3e MC |
664 | int check_md; |
665 | size_t i; | |
9e84a42d | 666 | |
0f113f3e | 667 | /* Check to see we have necessary signing algorithm */ |
4a1b4280 | 668 | if (group_id == TLSEXT_curve_P_256) |
0f113f3e | 669 | check_md = NID_ecdsa_with_SHA256; |
4a1b4280 | 670 | else if (group_id == TLSEXT_curve_P_384) |
0f113f3e MC |
671 | check_md = NID_ecdsa_with_SHA384; |
672 | else | |
673 | return 0; /* Should never happen */ | |
29948ac8 BK |
674 | for (i = 0; i < s->shared_sigalgslen; i++) { |
675 | if (check_md == s->shared_sigalgs[i]->sigandhash) | |
4a1b4280 DSH |
676 | return 1;; |
677 | } | |
678 | return 0; | |
0f113f3e | 679 | } |
4a1b4280 | 680 | return 1; |
0f113f3e MC |
681 | } |
682 | ||
6977e8ee | 683 | /* |
8483a003 | 684 | * tls1_check_ec_tmp_key - Check EC temporary key compatibility |
6977e8ee KR |
685 | * @s: SSL connection |
686 | * @cid: Cipher ID we're considering using | |
687 | * | |
688 | * Checks that the kECDHE cipher suite we're considering using | |
689 | * is compatible with the client extensions. | |
690 | * | |
691 | * Returns 0 when the cipher can't be used or 1 when it can. | |
692 | */ | |
2ea80354 | 693 | int tls1_check_ec_tmp_key(SSL *s, unsigned long cid) |
0f113f3e | 694 | { |
4a1b4280 DSH |
695 | /* If not Suite B just need a shared group */ |
696 | if (!tls1_suiteb(s)) | |
697 | return tls1_shared_group(s, 0) != 0; | |
0f113f3e MC |
698 | /* |
699 | * If Suite B, AES128 MUST use P-256 and AES256 MUST use P-384, no other | |
700 | * curves permitted. | |
701 | */ | |
4a1b4280 | 702 | if (cid == TLS1_CK_ECDHE_ECDSA_WITH_AES_128_GCM_SHA256) |
dcf8b01f | 703 | return tls1_check_group_id(s, TLSEXT_curve_P_256, 1); |
4a1b4280 | 704 | if (cid == TLS1_CK_ECDHE_ECDSA_WITH_AES_256_GCM_SHA384) |
dcf8b01f | 705 | return tls1_check_group_id(s, TLSEXT_curve_P_384, 1); |
4a1b4280 DSH |
706 | |
707 | return 0; | |
0f113f3e | 708 | } |
d0595f17 | 709 | |
14536c8c DSH |
710 | #else |
711 | ||
712 | static int tls1_check_cert_param(SSL *s, X509 *x, int set_ee_md) | |
0f113f3e MC |
713 | { |
714 | return 1; | |
715 | } | |
14536c8c | 716 | |
0f113f3e | 717 | #endif /* OPENSSL_NO_EC */ |
f1fd4544 | 718 | |
703bcee0 | 719 | /* Default sigalg schemes */ |
98c792d1 | 720 | static const uint16_t tls12_sigalgs[] = { |
703bcee0 MC |
721 | #ifndef OPENSSL_NO_EC |
722 | TLSEXT_SIGALG_ecdsa_secp256r1_sha256, | |
723 | TLSEXT_SIGALG_ecdsa_secp384r1_sha384, | |
724 | TLSEXT_SIGALG_ecdsa_secp521r1_sha512, | |
3d234c9e | 725 | TLSEXT_SIGALG_ed25519, |
0e1d6ecf | 726 | TLSEXT_SIGALG_ed448, |
e481f9b9 | 727 | #endif |
0f113f3e | 728 | |
f55e99f7 BK |
729 | TLSEXT_SIGALG_rsa_pss_pss_sha256, |
730 | TLSEXT_SIGALG_rsa_pss_pss_sha384, | |
731 | TLSEXT_SIGALG_rsa_pss_pss_sha512, | |
732 | TLSEXT_SIGALG_rsa_pss_rsae_sha256, | |
733 | TLSEXT_SIGALG_rsa_pss_rsae_sha384, | |
734 | TLSEXT_SIGALG_rsa_pss_rsae_sha512, | |
536199ec | 735 | |
703bcee0 MC |
736 | TLSEXT_SIGALG_rsa_pkcs1_sha256, |
737 | TLSEXT_SIGALG_rsa_pkcs1_sha384, | |
738 | TLSEXT_SIGALG_rsa_pkcs1_sha512, | |
0f113f3e | 739 | |
5eeb6c6e | 740 | #ifndef OPENSSL_NO_EC |
d8311fc9 | 741 | TLSEXT_SIGALG_ecdsa_sha224, |
42ab2230 | 742 | TLSEXT_SIGALG_ecdsa_sha1, |
5eeb6c6e | 743 | #endif |
d8311fc9 | 744 | TLSEXT_SIGALG_rsa_pkcs1_sha224, |
42ab2230 | 745 | TLSEXT_SIGALG_rsa_pkcs1_sha1, |
5eeb6c6e | 746 | #ifndef OPENSSL_NO_DSA |
d8311fc9 | 747 | TLSEXT_SIGALG_dsa_sha224, |
42ab2230 MC |
748 | TLSEXT_SIGALG_dsa_sha1, |
749 | ||
703bcee0 MC |
750 | TLSEXT_SIGALG_dsa_sha256, |
751 | TLSEXT_SIGALG_dsa_sha384, | |
41f10305 DB |
752 | TLSEXT_SIGALG_dsa_sha512, |
753 | #endif | |
754 | #ifndef OPENSSL_NO_GOST | |
6f892296 NM |
755 | TLSEXT_SIGALG_gostr34102012_256_intrinsic, |
756 | TLSEXT_SIGALG_gostr34102012_512_intrinsic, | |
41f10305 DB |
757 | TLSEXT_SIGALG_gostr34102012_256_gostr34112012_256, |
758 | TLSEXT_SIGALG_gostr34102012_512_gostr34112012_512, | |
759 | TLSEXT_SIGALG_gostr34102001_gostr3411, | |
5eeb6c6e | 760 | #endif |
fc101f88 | 761 | }; |
0f113f3e | 762 | |
e481f9b9 | 763 | #ifndef OPENSSL_NO_EC |
98c792d1 | 764 | static const uint16_t suiteb_sigalgs[] = { |
703bcee0 MC |
765 | TLSEXT_SIGALG_ecdsa_secp256r1_sha256, |
766 | TLSEXT_SIGALG_ecdsa_secp384r1_sha384 | |
2ea80354 | 767 | }; |
e481f9b9 | 768 | #endif |
aff8c126 | 769 | |
7a531ee4 | 770 | static const SIGALG_LOOKUP sigalg_lookup_tbl[] = { |
5eeb6c6e | 771 | #ifndef OPENSSL_NO_EC |
edbfba1a | 772 | {"ecdsa_secp256r1_sha256", TLSEXT_SIGALG_ecdsa_secp256r1_sha256, |
17ae384e DSH |
773 | NID_sha256, SSL_MD_SHA256_IDX, EVP_PKEY_EC, SSL_PKEY_ECC, |
774 | NID_ecdsa_with_SHA256, NID_X9_62_prime256v1}, | |
edbfba1a | 775 | {"ecdsa_secp384r1_sha384", TLSEXT_SIGALG_ecdsa_secp384r1_sha384, |
17ae384e DSH |
776 | NID_sha384, SSL_MD_SHA384_IDX, EVP_PKEY_EC, SSL_PKEY_ECC, |
777 | NID_ecdsa_with_SHA384, NID_secp384r1}, | |
edbfba1a | 778 | {"ecdsa_secp521r1_sha512", TLSEXT_SIGALG_ecdsa_secp521r1_sha512, |
17ae384e DSH |
779 | NID_sha512, SSL_MD_SHA512_IDX, EVP_PKEY_EC, SSL_PKEY_ECC, |
780 | NID_ecdsa_with_SHA512, NID_secp521r1}, | |
b04d4e38 | 781 | {"ed25519", TLSEXT_SIGALG_ed25519, |
d2916a5b | 782 | NID_undef, -1, EVP_PKEY_ED25519, SSL_PKEY_ED25519, |
b04d4e38 | 783 | NID_undef, NID_undef}, |
0e1d6ecf MC |
784 | {"ed448", TLSEXT_SIGALG_ed448, |
785 | NID_undef, -1, EVP_PKEY_ED448, SSL_PKEY_ED448, | |
786 | NID_undef, NID_undef}, | |
d8311fc9 MC |
787 | {NULL, TLSEXT_SIGALG_ecdsa_sha224, |
788 | NID_sha224, SSL_MD_SHA224_IDX, EVP_PKEY_EC, SSL_PKEY_ECC, | |
789 | NID_ecdsa_with_SHA224, NID_undef}, | |
edbfba1a | 790 | {NULL, TLSEXT_SIGALG_ecdsa_sha1, |
17ae384e DSH |
791 | NID_sha1, SSL_MD_SHA1_IDX, EVP_PKEY_EC, SSL_PKEY_ECC, |
792 | NID_ecdsa_with_SHA1, NID_undef}, | |
5eeb6c6e | 793 | #endif |
f55e99f7 BK |
794 | {"rsa_pss_rsae_sha256", TLSEXT_SIGALG_rsa_pss_rsae_sha256, |
795 | NID_sha256, SSL_MD_SHA256_IDX, EVP_PKEY_RSA_PSS, SSL_PKEY_RSA, | |
796 | NID_undef, NID_undef}, | |
797 | {"rsa_pss_rsae_sha384", TLSEXT_SIGALG_rsa_pss_rsae_sha384, | |
798 | NID_sha384, SSL_MD_SHA384_IDX, EVP_PKEY_RSA_PSS, SSL_PKEY_RSA, | |
799 | NID_undef, NID_undef}, | |
800 | {"rsa_pss_rsae_sha512", TLSEXT_SIGALG_rsa_pss_rsae_sha512, | |
801 | NID_sha512, SSL_MD_SHA512_IDX, EVP_PKEY_RSA_PSS, SSL_PKEY_RSA, | |
802 | NID_undef, NID_undef}, | |
803 | {"rsa_pss_pss_sha256", TLSEXT_SIGALG_rsa_pss_pss_sha256, | |
17ae384e DSH |
804 | NID_sha256, SSL_MD_SHA256_IDX, EVP_PKEY_RSA_PSS, SSL_PKEY_RSA_PSS_SIGN, |
805 | NID_undef, NID_undef}, | |
f55e99f7 | 806 | {"rsa_pss_pss_sha384", TLSEXT_SIGALG_rsa_pss_pss_sha384, |
17ae384e DSH |
807 | NID_sha384, SSL_MD_SHA384_IDX, EVP_PKEY_RSA_PSS, SSL_PKEY_RSA_PSS_SIGN, |
808 | NID_undef, NID_undef}, | |
f55e99f7 | 809 | {"rsa_pss_pss_sha512", TLSEXT_SIGALG_rsa_pss_pss_sha512, |
17ae384e DSH |
810 | NID_sha512, SSL_MD_SHA512_IDX, EVP_PKEY_RSA_PSS, SSL_PKEY_RSA_PSS_SIGN, |
811 | NID_undef, NID_undef}, | |
edbfba1a | 812 | {"rsa_pkcs1_sha256", TLSEXT_SIGALG_rsa_pkcs1_sha256, |
d0ff28f8 | 813 | NID_sha256, SSL_MD_SHA256_IDX, EVP_PKEY_RSA, SSL_PKEY_RSA, |
17ae384e | 814 | NID_sha256WithRSAEncryption, NID_undef}, |
edbfba1a | 815 | {"rsa_pkcs1_sha384", TLSEXT_SIGALG_rsa_pkcs1_sha384, |
d0ff28f8 | 816 | NID_sha384, SSL_MD_SHA384_IDX, EVP_PKEY_RSA, SSL_PKEY_RSA, |
17ae384e | 817 | NID_sha384WithRSAEncryption, NID_undef}, |
edbfba1a | 818 | {"rsa_pkcs1_sha512", TLSEXT_SIGALG_rsa_pkcs1_sha512, |
d0ff28f8 | 819 | NID_sha512, SSL_MD_SHA512_IDX, EVP_PKEY_RSA, SSL_PKEY_RSA, |
17ae384e | 820 | NID_sha512WithRSAEncryption, NID_undef}, |
d8311fc9 MC |
821 | {"rsa_pkcs1_sha224", TLSEXT_SIGALG_rsa_pkcs1_sha224, |
822 | NID_sha224, SSL_MD_SHA224_IDX, EVP_PKEY_RSA, SSL_PKEY_RSA, | |
823 | NID_sha224WithRSAEncryption, NID_undef}, | |
edbfba1a | 824 | {"rsa_pkcs1_sha1", TLSEXT_SIGALG_rsa_pkcs1_sha1, |
d0ff28f8 | 825 | NID_sha1, SSL_MD_SHA1_IDX, EVP_PKEY_RSA, SSL_PKEY_RSA, |
17ae384e | 826 | NID_sha1WithRSAEncryption, NID_undef}, |
5eeb6c6e | 827 | #ifndef OPENSSL_NO_DSA |
edbfba1a | 828 | {NULL, TLSEXT_SIGALG_dsa_sha256, |
17ae384e DSH |
829 | NID_sha256, SSL_MD_SHA256_IDX, EVP_PKEY_DSA, SSL_PKEY_DSA_SIGN, |
830 | NID_dsa_with_SHA256, NID_undef}, | |
edbfba1a | 831 | {NULL, TLSEXT_SIGALG_dsa_sha384, |
17ae384e DSH |
832 | NID_sha384, SSL_MD_SHA384_IDX, EVP_PKEY_DSA, SSL_PKEY_DSA_SIGN, |
833 | NID_undef, NID_undef}, | |
edbfba1a | 834 | {NULL, TLSEXT_SIGALG_dsa_sha512, |
17ae384e DSH |
835 | NID_sha512, SSL_MD_SHA512_IDX, EVP_PKEY_DSA, SSL_PKEY_DSA_SIGN, |
836 | NID_undef, NID_undef}, | |
d8311fc9 MC |
837 | {NULL, TLSEXT_SIGALG_dsa_sha224, |
838 | NID_sha224, SSL_MD_SHA224_IDX, EVP_PKEY_DSA, SSL_PKEY_DSA_SIGN, | |
839 | NID_undef, NID_undef}, | |
edbfba1a | 840 | {NULL, TLSEXT_SIGALG_dsa_sha1, |
17ae384e DSH |
841 | NID_sha1, SSL_MD_SHA1_IDX, EVP_PKEY_DSA, SSL_PKEY_DSA_SIGN, |
842 | NID_dsaWithSHA1, NID_undef}, | |
5eeb6c6e MC |
843 | #endif |
844 | #ifndef OPENSSL_NO_GOST | |
6f892296 NM |
845 | {NULL, TLSEXT_SIGALG_gostr34102012_256_intrinsic, |
846 | NID_id_GostR3411_2012_256, SSL_MD_GOST12_256_IDX, | |
847 | NID_id_GostR3410_2012_256, SSL_PKEY_GOST12_256, | |
848 | NID_undef, NID_undef}, | |
849 | {NULL, TLSEXT_SIGALG_gostr34102012_512_intrinsic, | |
850 | NID_id_GostR3411_2012_512, SSL_MD_GOST12_512_IDX, | |
851 | NID_id_GostR3410_2012_512, SSL_PKEY_GOST12_512, | |
852 | NID_undef, NID_undef}, | |
edbfba1a | 853 | {NULL, TLSEXT_SIGALG_gostr34102012_256_gostr34112012_256, |
17ae384e DSH |
854 | NID_id_GostR3411_2012_256, SSL_MD_GOST12_256_IDX, |
855 | NID_id_GostR3410_2012_256, SSL_PKEY_GOST12_256, | |
856 | NID_undef, NID_undef}, | |
edbfba1a | 857 | {NULL, TLSEXT_SIGALG_gostr34102012_512_gostr34112012_512, |
17ae384e DSH |
858 | NID_id_GostR3411_2012_512, SSL_MD_GOST12_512_IDX, |
859 | NID_id_GostR3410_2012_512, SSL_PKEY_GOST12_512, | |
860 | NID_undef, NID_undef}, | |
edbfba1a | 861 | {NULL, TLSEXT_SIGALG_gostr34102001_gostr3411, |
17ae384e DSH |
862 | NID_id_GostR3411_94, SSL_MD_GOST94_IDX, |
863 | NID_id_GostR3410_2001, SSL_PKEY_GOST01, | |
864 | NID_undef, NID_undef} | |
5eeb6c6e | 865 | #endif |
703bcee0 | 866 | }; |
0972bc5c DSH |
867 | /* Legacy sigalgs for TLS < 1.2 RSA TLS signatures */ |
868 | static const SIGALG_LOOKUP legacy_rsa_sigalg = { | |
869 | "rsa_pkcs1_md5_sha1", 0, | |
870 | NID_md5_sha1, SSL_MD_MD5_SHA1_IDX, | |
871 | EVP_PKEY_RSA, SSL_PKEY_RSA, | |
872 | NID_undef, NID_undef | |
873 | }; | |
874 | ||
875 | /* | |
876 | * Default signature algorithm values used if signature algorithms not present. | |
877 | * From RFC5246. Note: order must match certificate index order. | |
878 | */ | |
879 | static const uint16_t tls_default_sigalg[] = { | |
880 | TLSEXT_SIGALG_rsa_pkcs1_sha1, /* SSL_PKEY_RSA */ | |
045d078a | 881 | 0, /* SSL_PKEY_RSA_PSS_SIGN */ |
0972bc5c DSH |
882 | TLSEXT_SIGALG_dsa_sha1, /* SSL_PKEY_DSA_SIGN */ |
883 | TLSEXT_SIGALG_ecdsa_sha1, /* SSL_PKEY_ECC */ | |
884 | TLSEXT_SIGALG_gostr34102001_gostr3411, /* SSL_PKEY_GOST01 */ | |
6f892296 NM |
885 | TLSEXT_SIGALG_gostr34102012_256_intrinsic, /* SSL_PKEY_GOST12_256 */ |
886 | TLSEXT_SIGALG_gostr34102012_512_intrinsic, /* SSL_PKEY_GOST12_512 */ | |
0e1d6ecf MC |
887 | 0, /* SSL_PKEY_ED25519 */ |
888 | 0, /* SSL_PKEY_ED448 */ | |
0972bc5c | 889 | }; |
703bcee0 | 890 | |
4d43ee28 DSH |
891 | /* Lookup TLS signature algorithm */ |
892 | static const SIGALG_LOOKUP *tls1_lookup_sigalg(uint16_t sigalg) | |
703bcee0 MC |
893 | { |
894 | size_t i; | |
4d43ee28 | 895 | const SIGALG_LOOKUP *s; |
703bcee0 | 896 | |
4d43ee28 DSH |
897 | for (i = 0, s = sigalg_lookup_tbl; i < OSSL_NELEM(sigalg_lookup_tbl); |
898 | i++, s++) { | |
899 | if (s->sigalg == sigalg) | |
900 | return s; | |
703bcee0 | 901 | } |
4d43ee28 DSH |
902 | return NULL; |
903 | } | |
168067b6 | 904 | /* Lookup hash: return 0 if invalid or not enabled */ |
c8f6c28a | 905 | int tls1_lookup_md(SSL_CTX *ctx, const SIGALG_LOOKUP *lu, const EVP_MD **pmd) |
168067b6 DSH |
906 | { |
907 | const EVP_MD *md; | |
908 | if (lu == NULL) | |
909 | return 0; | |
910 | /* lu->hash == NID_undef means no associated digest */ | |
911 | if (lu->hash == NID_undef) { | |
912 | md = NULL; | |
913 | } else { | |
c8f6c28a | 914 | md = ssl_md(ctx, lu->hash_idx); |
168067b6 DSH |
915 | if (md == NULL) |
916 | return 0; | |
917 | } | |
918 | if (pmd) | |
919 | *pmd = md; | |
920 | return 1; | |
921 | } | |
922 | ||
0fe3db25 NR |
923 | /* |
924 | * Check if key is large enough to generate RSA-PSS signature. | |
925 | * | |
926 | * The key must greater than or equal to 2 * hash length + 2. | |
927 | * SHA512 has a hash length of 64 bytes, which is incompatible | |
928 | * with a 128 byte (1024 bit) key. | |
929 | */ | |
930 | #define RSA_PSS_MINIMUM_KEY_SIZE(md) (2 * EVP_MD_size(md) + 2) | |
c5f87134 | 931 | static int rsa_pss_check_min_key_size(SSL_CTX *ctx, const EVP_PKEY *pkey, |
c8f6c28a | 932 | const SIGALG_LOOKUP *lu) |
0fe3db25 NR |
933 | { |
934 | const EVP_MD *md; | |
935 | ||
c5f87134 | 936 | if (pkey == NULL) |
0fe3db25 | 937 | return 0; |
c8f6c28a | 938 | if (!tls1_lookup_md(ctx, lu, &md) || md == NULL) |
0fe3db25 | 939 | return 0; |
c5f87134 | 940 | if (EVP_PKEY_size(pkey) < RSA_PSS_MINIMUM_KEY_SIZE(md)) |
0fe3db25 NR |
941 | return 0; |
942 | return 1; | |
943 | } | |
944 | ||
0972bc5c | 945 | /* |
b0031e5d KR |
946 | * Returns a signature algorithm when the peer did not send a list of supported |
947 | * signature algorithms. The signature algorithm is fixed for the certificate | |
948 | * type. |idx| is a certificate type index (SSL_PKEY_*). When |idx| is -1 the | |
949 | * certificate type from |s| will be used. | |
950 | * Returns the signature algorithm to use, or NULL on error. | |
0972bc5c DSH |
951 | */ |
952 | static const SIGALG_LOOKUP *tls1_get_legacy_sigalg(const SSL *s, int idx) | |
953 | { | |
7f6b466b DSH |
954 | if (idx == -1) { |
955 | if (s->server) { | |
956 | size_t i; | |
957 | ||
958 | /* Work out index corresponding to ciphersuite */ | |
959 | for (i = 0; i < SSL_PKEY_NUM; i++) { | |
960 | const SSL_CERT_LOOKUP *clu = ssl_cert_lookup_by_idx(i); | |
961 | ||
555cbb32 | 962 | if (clu->amask & s->s3.tmp.new_cipher->algorithm_auth) { |
7f6b466b DSH |
963 | idx = i; |
964 | break; | |
965 | } | |
966 | } | |
1f65c045 DB |
967 | |
968 | /* | |
969 | * Some GOST ciphersuites allow more than one signature algorithms | |
970 | * */ | |
555cbb32 | 971 | if (idx == SSL_PKEY_GOST01 && s->s3.tmp.new_cipher->algorithm_auth != SSL_aGOST01) { |
1f65c045 DB |
972 | int real_idx; |
973 | ||
974 | for (real_idx = SSL_PKEY_GOST12_512; real_idx >= SSL_PKEY_GOST01; | |
975 | real_idx--) { | |
976 | if (s->cert->pkeys[real_idx].privatekey != NULL) { | |
977 | idx = real_idx; | |
978 | break; | |
979 | } | |
980 | } | |
981 | } | |
7f6b466b DSH |
982 | } else { |
983 | idx = s->cert->key - s->cert->pkeys; | |
984 | } | |
985 | } | |
0972bc5c DSH |
986 | if (idx < 0 || idx >= (int)OSSL_NELEM(tls_default_sigalg)) |
987 | return NULL; | |
988 | if (SSL_USE_SIGALGS(s) || idx != SSL_PKEY_RSA) { | |
989 | const SIGALG_LOOKUP *lu = tls1_lookup_sigalg(tls_default_sigalg[idx]); | |
990 | ||
c8f6c28a | 991 | if (!tls1_lookup_md(s->ctx, lu, NULL)) |
0972bc5c | 992 | return NULL; |
b0031e5d KR |
993 | if (!tls12_sigalg_allowed(s, SSL_SECOP_SIGALG_SUPPORTED, lu)) |
994 | return NULL; | |
0972bc5c DSH |
995 | return lu; |
996 | } | |
b0031e5d KR |
997 | if (!tls12_sigalg_allowed(s, SSL_SECOP_SIGALG_SUPPORTED, &legacy_rsa_sigalg)) |
998 | return NULL; | |
0972bc5c DSH |
999 | return &legacy_rsa_sigalg; |
1000 | } | |
1001 | /* Set peer sigalg based key type */ | |
1002 | int tls1_set_peer_legacy_sigalg(SSL *s, const EVP_PKEY *pkey) | |
1003 | { | |
52fd27f9 DSH |
1004 | size_t idx; |
1005 | const SIGALG_LOOKUP *lu; | |
0972bc5c | 1006 | |
52fd27f9 DSH |
1007 | if (ssl_cert_lookup_by_pkey(pkey, &idx) == NULL) |
1008 | return 0; | |
1009 | lu = tls1_get_legacy_sigalg(s, idx); | |
0972bc5c DSH |
1010 | if (lu == NULL) |
1011 | return 0; | |
555cbb32 | 1012 | s->s3.tmp.peer_sigalg = lu; |
0972bc5c DSH |
1013 | return 1; |
1014 | } | |
703bcee0 | 1015 | |
98c792d1 | 1016 | size_t tls12_get_psigalgs(SSL *s, int sent, const uint16_t **psigs) |
0f113f3e MC |
1017 | { |
1018 | /* | |
1019 | * If Suite B mode use Suite B sigalgs only, ignore any other | |
1020 | * preferences. | |
1021 | */ | |
e481f9b9 | 1022 | #ifndef OPENSSL_NO_EC |
0f113f3e MC |
1023 | switch (tls1_suiteb(s)) { |
1024 | case SSL_CERT_FLAG_SUITEB_128_LOS: | |
1025 | *psigs = suiteb_sigalgs; | |
7a531ee4 | 1026 | return OSSL_NELEM(suiteb_sigalgs); |
0f113f3e MC |
1027 | |
1028 | case SSL_CERT_FLAG_SUITEB_128_LOS_ONLY: | |
1029 | *psigs = suiteb_sigalgs; | |
7a531ee4 | 1030 | return 1; |
0f113f3e MC |
1031 | |
1032 | case SSL_CERT_FLAG_SUITEB_192_LOS: | |
7a531ee4 MC |
1033 | *psigs = suiteb_sigalgs + 1; |
1034 | return 1; | |
0f113f3e | 1035 | } |
e481f9b9 | 1036 | #endif |
a9669ddc DSH |
1037 | /* |
1038 | * We use client_sigalgs (if not NULL) if we're a server | |
1039 | * and sending a certificate request or if we're a client and | |
1040 | * determining which shared algorithm to use. | |
1041 | */ | |
1042 | if ((s->server == sent) && s->cert->client_sigalgs != NULL) { | |
0f113f3e MC |
1043 | *psigs = s->cert->client_sigalgs; |
1044 | return s->cert->client_sigalgslen; | |
1045 | } else if (s->cert->conf_sigalgs) { | |
1046 | *psigs = s->cert->conf_sigalgs; | |
1047 | return s->cert->conf_sigalgslen; | |
1048 | } else { | |
1049 | *psigs = tls12_sigalgs; | |
703bcee0 | 1050 | return OSSL_NELEM(tls12_sigalgs); |
0f113f3e MC |
1051 | } |
1052 | } | |
1053 | ||
65d2c16c | 1054 | #ifndef OPENSSL_NO_EC |
de4dc598 MC |
1055 | /* |
1056 | * Called by servers only. Checks that we have a sig alg that supports the | |
1057 | * specified EC curve. | |
1058 | */ | |
1059 | int tls_check_sigalg_curve(const SSL *s, int curve) | |
1060 | { | |
1061 | const uint16_t *sigs; | |
1062 | size_t siglen, i; | |
1063 | ||
1064 | if (s->cert->conf_sigalgs) { | |
1065 | sigs = s->cert->conf_sigalgs; | |
1066 | siglen = s->cert->conf_sigalgslen; | |
1067 | } else { | |
1068 | sigs = tls12_sigalgs; | |
1069 | siglen = OSSL_NELEM(tls12_sigalgs); | |
1070 | } | |
1071 | ||
1072 | for (i = 0; i < siglen; i++) { | |
1073 | const SIGALG_LOOKUP *lu = tls1_lookup_sigalg(sigs[i]); | |
1074 | ||
1075 | if (lu == NULL) | |
1076 | continue; | |
1077 | if (lu->sig == EVP_PKEY_EC | |
1078 | && lu->curve != NID_undef | |
1079 | && curve == lu->curve) | |
1080 | return 1; | |
1081 | } | |
1082 | ||
1083 | return 0; | |
1084 | } | |
65d2c16c | 1085 | #endif |
de4dc598 | 1086 | |
620c97b6 KR |
1087 | /* |
1088 | * Return the number of security bits for the signature algorithm, or 0 on | |
1089 | * error. | |
1090 | */ | |
1091 | static int sigalg_security_bits(SSL_CTX *ctx, const SIGALG_LOOKUP *lu) | |
1092 | { | |
1093 | const EVP_MD *md = NULL; | |
1094 | int secbits = 0; | |
1095 | ||
1096 | if (!tls1_lookup_md(ctx, lu, &md)) | |
1097 | return 0; | |
1098 | if (md != NULL) | |
1099 | { | |
1100 | /* Security bits: half digest bits */ | |
1101 | secbits = EVP_MD_size(md) * 4; | |
1102 | } else { | |
1103 | /* Values from https://tools.ietf.org/html/rfc8032#section-8.5 */ | |
1104 | if (lu->sigalg == TLSEXT_SIGALG_ed25519) | |
1105 | secbits = 128; | |
1106 | else if (lu->sigalg == TLSEXT_SIGALG_ed448) | |
1107 | secbits = 224; | |
1108 | } | |
1109 | return secbits; | |
1110 | } | |
1111 | ||
0f113f3e MC |
1112 | /* |
1113 | * Check signature algorithm is consistent with sent supported signature | |
b2eb6998 DSH |
1114 | * algorithms and if so set relevant digest and signature scheme in |
1115 | * s. | |
ec4a50b3 | 1116 | */ |
f742cda8 | 1117 | int tls12_check_peer_sigalg(SSL *s, uint16_t sig, EVP_PKEY *pkey) |
0f113f3e | 1118 | { |
98c792d1 | 1119 | const uint16_t *sent_sigs; |
5554facb | 1120 | const EVP_MD *md = NULL; |
703bcee0 | 1121 | char sigalgstr[2]; |
11d2641f | 1122 | size_t sent_sigslen, i, cidx; |
c2041da8 | 1123 | int pkeyid = -1; |
f742cda8 | 1124 | const SIGALG_LOOKUP *lu; |
620c97b6 | 1125 | int secbits = 0; |
4d43ee28 | 1126 | |
c2041da8 RL |
1127 | /* |
1128 | * TODO(3.0) Remove this when we adapted this function for provider | |
1129 | * side keys. We know that EVP_PKEY_get0() downgrades an EVP_PKEY | |
1130 | * to contain a legacy key. | |
1131 | * | |
1132 | * THIS IS TEMPORARY | |
1133 | */ | |
1134 | EVP_PKEY_get0(pkey); | |
1135 | if (EVP_PKEY_id(pkey) == EVP_PKEY_NONE) | |
1136 | return 0; | |
1137 | ||
1138 | pkeyid = EVP_PKEY_id(pkey); | |
0f113f3e | 1139 | /* Should never happen */ |
536199ec | 1140 | if (pkeyid == -1) |
0f113f3e | 1141 | return -1; |
5a8916d9 DSH |
1142 | if (SSL_IS_TLS13(s)) { |
1143 | /* Disallow DSA for TLS 1.3 */ | |
1144 | if (pkeyid == EVP_PKEY_DSA) { | |
f63a17d6 MC |
1145 | SSLfatal(s, SSL_AD_ILLEGAL_PARAMETER, SSL_F_TLS12_CHECK_PEER_SIGALG, |
1146 | SSL_R_WRONG_SIGNATURE_TYPE); | |
5a8916d9 DSH |
1147 | return 0; |
1148 | } | |
1149 | /* Only allow PSS for TLS 1.3 */ | |
1150 | if (pkeyid == EVP_PKEY_RSA) | |
1151 | pkeyid = EVP_PKEY_RSA_PSS; | |
1152 | } | |
f742cda8 DSH |
1153 | lu = tls1_lookup_sigalg(sig); |
1154 | /* | |
d8311fc9 MC |
1155 | * Check sigalgs is known. Disallow SHA1/SHA224 with TLS 1.3. Check key type |
1156 | * is consistent with signature: RSA keys can be used for RSA-PSS | |
f742cda8 | 1157 | */ |
d8311fc9 MC |
1158 | if (lu == NULL |
1159 | || (SSL_IS_TLS13(s) && (lu->hash == NID_sha1 || lu->hash == NID_sha224)) | |
095a982b | 1160 | || (pkeyid != lu->sig |
f742cda8 | 1161 | && (lu->sig != EVP_PKEY_RSA_PSS || pkeyid != EVP_PKEY_RSA))) { |
f63a17d6 MC |
1162 | SSLfatal(s, SSL_AD_ILLEGAL_PARAMETER, SSL_F_TLS12_CHECK_PEER_SIGALG, |
1163 | SSL_R_WRONG_SIGNATURE_TYPE); | |
0f113f3e MC |
1164 | return 0; |
1165 | } | |
11d2641f MC |
1166 | /* Check the sigalg is consistent with the key OID */ |
1167 | if (!ssl_cert_lookup_by_nid(EVP_PKEY_id(pkey), &cidx) | |
1168 | || lu->sig_idx != (int)cidx) { | |
1169 | SSLfatal(s, SSL_AD_ILLEGAL_PARAMETER, SSL_F_TLS12_CHECK_PEER_SIGALG, | |
1170 | SSL_R_WRONG_SIGNATURE_TYPE); | |
1171 | return 0; | |
1172 | } | |
1173 | ||
e481f9b9 | 1174 | #ifndef OPENSSL_NO_EC |
fe3066ee | 1175 | if (pkeyid == EVP_PKEY_EC) { |
44b6318f | 1176 | |
4a1b4280 DSH |
1177 | /* Check point compression is permitted */ |
1178 | if (!tls1_check_pkey_comp(s, pkey)) { | |
f63a17d6 MC |
1179 | SSLfatal(s, SSL_AD_ILLEGAL_PARAMETER, |
1180 | SSL_F_TLS12_CHECK_PEER_SIGALG, | |
1181 | SSL_R_ILLEGAL_POINT_COMPRESSION); | |
4a1b4280 DSH |
1182 | return 0; |
1183 | } | |
1184 | ||
1185 | /* For TLS 1.3 or Suite B check curve matches signature algorithm */ | |
1186 | if (SSL_IS_TLS13(s) || tls1_suiteb(s)) { | |
c2041da8 | 1187 | int curve = evp_pkey_get_EC_KEY_curve_nid(pkey); |
4a1b4280 | 1188 | |
a34a9df0 | 1189 | if (lu->curve != NID_undef && curve != lu->curve) { |
f63a17d6 MC |
1190 | SSLfatal(s, SSL_AD_ILLEGAL_PARAMETER, |
1191 | SSL_F_TLS12_CHECK_PEER_SIGALG, SSL_R_WRONG_CURVE); | |
8f88cb53 DSH |
1192 | return 0; |
1193 | } | |
4a1b4280 DSH |
1194 | } |
1195 | if (!SSL_IS_TLS13(s)) { | |
1196 | /* Check curve matches extensions */ | |
dcf8b01f | 1197 | if (!tls1_check_group_id(s, tls1_get_group_id(pkey), 1)) { |
f63a17d6 MC |
1198 | SSLfatal(s, SSL_AD_ILLEGAL_PARAMETER, |
1199 | SSL_F_TLS12_CHECK_PEER_SIGALG, SSL_R_WRONG_CURVE); | |
8f88cb53 DSH |
1200 | return 0; |
1201 | } | |
8f88cb53 | 1202 | if (tls1_suiteb(s)) { |
f1adb006 DSH |
1203 | /* Check sigalg matches a permissible Suite B value */ |
1204 | if (sig != TLSEXT_SIGALG_ecdsa_secp256r1_sha256 | |
1205 | && sig != TLSEXT_SIGALG_ecdsa_secp384r1_sha384) { | |
f63a17d6 MC |
1206 | SSLfatal(s, SSL_AD_HANDSHAKE_FAILURE, |
1207 | SSL_F_TLS12_CHECK_PEER_SIGALG, | |
1208 | SSL_R_WRONG_SIGNATURE_TYPE); | |
0f113f3e | 1209 | return 0; |
f1adb006 | 1210 | } |
8f88cb53 | 1211 | } |
0f113f3e | 1212 | } |
8f88cb53 | 1213 | } else if (tls1_suiteb(s)) { |
f63a17d6 MC |
1214 | SSLfatal(s, SSL_AD_HANDSHAKE_FAILURE, SSL_F_TLS12_CHECK_PEER_SIGALG, |
1215 | SSL_R_WRONG_SIGNATURE_TYPE); | |
0f113f3e | 1216 | return 0; |
8f88cb53 | 1217 | } |
e481f9b9 | 1218 | #endif |
0f113f3e MC |
1219 | |
1220 | /* Check signature matches a type we sent */ | |
a9669ddc | 1221 | sent_sigslen = tls12_get_psigalgs(s, 1, &sent_sigs); |
536199ec | 1222 | for (i = 0; i < sent_sigslen; i++, sent_sigs++) { |
703bcee0 | 1223 | if (sig == *sent_sigs) |
0f113f3e MC |
1224 | break; |
1225 | } | |
1226 | /* Allow fallback to SHA1 if not strict mode */ | |
f742cda8 DSH |
1227 | if (i == sent_sigslen && (lu->hash != NID_sha1 |
1228 | || s->cert->cert_flags & SSL_CERT_FLAGS_CHECK_TLS_STRICT)) { | |
f63a17d6 MC |
1229 | SSLfatal(s, SSL_AD_HANDSHAKE_FAILURE, SSL_F_TLS12_CHECK_PEER_SIGALG, |
1230 | SSL_R_WRONG_SIGNATURE_TYPE); | |
0f113f3e MC |
1231 | return 0; |
1232 | } | |
c8f6c28a | 1233 | if (!tls1_lookup_md(s->ctx, lu, &md)) { |
f63a17d6 MC |
1234 | SSLfatal(s, SSL_AD_HANDSHAKE_FAILURE, SSL_F_TLS12_CHECK_PEER_SIGALG, |
1235 | SSL_R_UNKNOWN_DIGEST); | |
1236 | return 0; | |
0f113f3e | 1237 | } |
620c97b6 KR |
1238 | /* |
1239 | * Make sure security callback allows algorithm. For historical | |
1240 | * reasons we have to pass the sigalg as a two byte char array. | |
1241 | */ | |
1242 | sigalgstr[0] = (sig >> 8) & 0xff; | |
1243 | sigalgstr[1] = sig & 0xff; | |
1244 | secbits = sigalg_security_bits(s->ctx, lu); | |
1245 | if (secbits == 0 || | |
1246 | !ssl_security(s, SSL_SECOP_SIGALG_CHECK, secbits, | |
1247 | md != NULL ? EVP_MD_type(md) : NID_undef, | |
1248 | (void *)sigalgstr)) { | |
1249 | SSLfatal(s, SSL_AD_HANDSHAKE_FAILURE, SSL_F_TLS12_CHECK_PEER_SIGALG, | |
1250 | SSL_R_WRONG_SIGNATURE_TYPE); | |
1251 | return 0; | |
0f113f3e | 1252 | } |
6cbebb55 | 1253 | /* Store the sigalg the peer uses */ |
555cbb32 | 1254 | s->s3.tmp.peer_sigalg = lu; |
0f113f3e MC |
1255 | return 1; |
1256 | } | |
2ea80354 | 1257 | |
42ef7aea DSH |
1258 | int SSL_get_peer_signature_type_nid(const SSL *s, int *pnid) |
1259 | { | |
555cbb32 | 1260 | if (s->s3.tmp.peer_sigalg == NULL) |
42ef7aea | 1261 | return 0; |
555cbb32 | 1262 | *pnid = s->s3.tmp.peer_sigalg->sig; |
42ef7aea DSH |
1263 | return 1; |
1264 | } | |
1265 | ||
a51c9f63 VD |
1266 | int SSL_get_signature_type_nid(const SSL *s, int *pnid) |
1267 | { | |
555cbb32 | 1268 | if (s->s3.tmp.sigalg == NULL) |
a51c9f63 | 1269 | return 0; |
555cbb32 | 1270 | *pnid = s->s3.tmp.sigalg->sig; |
a51c9f63 VD |
1271 | return 1; |
1272 | } | |
1273 | ||
0f113f3e | 1274 | /* |
3eb2aff4 KR |
1275 | * Set a mask of disabled algorithms: an algorithm is disabled if it isn't |
1276 | * supported, doesn't appear in supported signature algorithms, isn't supported | |
1277 | * by the enabled protocol versions or by the security level. | |
1278 | * | |
1279 | * This function should only be used for checking which ciphers are supported | |
1280 | * by the client. | |
1281 | * | |
1282 | * Call ssl_cipher_disabled() to check that it's enabled or not. | |
b7bfe69b | 1283 | */ |
1d0c08b4 | 1284 | int ssl_set_client_disabled(SSL *s) |
0f113f3e | 1285 | { |
555cbb32 TS |
1286 | s->s3.tmp.mask_a = 0; |
1287 | s->s3.tmp.mask_k = 0; | |
1288 | ssl_set_sig_mask(&s->s3.tmp.mask_a, s, SSL_SECOP_SIGALG_MASK); | |
1289 | if (ssl_get_min_max_version(s, &s->s3.tmp.min_ver, | |
1290 | &s->s3.tmp.max_ver, NULL) != 0) | |
1d0c08b4 | 1291 | return 0; |
a230b26e | 1292 | #ifndef OPENSSL_NO_PSK |
0f113f3e MC |
1293 | /* with PSK there must be client callback set */ |
1294 | if (!s->psk_client_callback) { | |
555cbb32 TS |
1295 | s->s3.tmp.mask_a |= SSL_aPSK; |
1296 | s->s3.tmp.mask_k |= SSL_PSK; | |
0f113f3e | 1297 | } |
a230b26e | 1298 | #endif /* OPENSSL_NO_PSK */ |
e481f9b9 | 1299 | #ifndef OPENSSL_NO_SRP |
0f113f3e | 1300 | if (!(s->srp_ctx.srp_Mask & SSL_kSRP)) { |
555cbb32 TS |
1301 | s->s3.tmp.mask_a |= SSL_aSRP; |
1302 | s->s3.tmp.mask_k |= SSL_kSRP; | |
0f113f3e | 1303 | } |
e481f9b9 | 1304 | #endif |
1d0c08b4 | 1305 | return 1; |
0f113f3e | 1306 | } |
fc101f88 | 1307 | |
3eb2aff4 KR |
1308 | /* |
1309 | * ssl_cipher_disabled - check that a cipher is disabled or not | |
1310 | * @s: SSL connection that you want to use the cipher on | |
1311 | * @c: cipher to check | |
1312 | * @op: Security check that you want to do | |
8af91fd9 | 1313 | * @ecdhe: If set to 1 then TLSv1 ECDHE ciphers are also allowed in SSLv3 |
3eb2aff4 KR |
1314 | * |
1315 | * Returns 1 when it's disabled, 0 when enabled. | |
1316 | */ | |
b0031e5d | 1317 | int ssl_cipher_disabled(const SSL *s, const SSL_CIPHER *c, int op, int ecdhe) |
0f113f3e | 1318 | { |
555cbb32 TS |
1319 | if (c->algorithm_mkey & s->s3.tmp.mask_k |
1320 | || c->algorithm_auth & s->s3.tmp.mask_a) | |
0f113f3e | 1321 | return 1; |
555cbb32 | 1322 | if (s->s3.tmp.max_ver == 0) |
3eb2aff4 | 1323 | return 1; |
8af91fd9 MC |
1324 | if (!SSL_IS_DTLS(s)) { |
1325 | int min_tls = c->min_tls; | |
1326 | ||
1327 | /* | |
1328 | * For historical reasons we will allow ECHDE to be selected by a server | |
1329 | * in SSLv3 if we are a client | |
1330 | */ | |
1331 | if (min_tls == TLS1_VERSION && ecdhe | |
1332 | && (c->algorithm_mkey & (SSL_kECDHE | SSL_kECDHEPSK)) != 0) | |
1333 | min_tls = SSL3_VERSION; | |
1334 | ||
555cbb32 | 1335 | if ((min_tls > s->s3.tmp.max_ver) || (c->max_tls < s->s3.tmp.min_ver)) |
8af91fd9 MC |
1336 | return 1; |
1337 | } | |
555cbb32 TS |
1338 | if (SSL_IS_DTLS(s) && (DTLS_VERSION_GT(c->min_dtls, s->s3.tmp.max_ver) |
1339 | || DTLS_VERSION_LT(c->max_dtls, s->s3.tmp.min_ver))) | |
3eb2aff4 KR |
1340 | return 1; |
1341 | ||
0f113f3e MC |
1342 | return !ssl_security(s, op, c->strength_bits, 0, (void *)c); |
1343 | } | |
b362ccab | 1344 | |
7da160b0 | 1345 | int tls_use_ticket(SSL *s) |
0f113f3e | 1346 | { |
08191294 | 1347 | if ((s->options & SSL_OP_NO_TICKET)) |
0f113f3e MC |
1348 | return 0; |
1349 | return ssl_security(s, SSL_SECOP_TICKET, 0, 0, NULL); | |
1350 | } | |
ed3883d2 | 1351 | |
e469af8d | 1352 | int tls1_set_server_sigalgs(SSL *s) |
0f113f3e | 1353 | { |
0f113f3e | 1354 | size_t i; |
8483a003 F |
1355 | |
1356 | /* Clear any shared signature algorithms */ | |
29948ac8 BK |
1357 | OPENSSL_free(s->shared_sigalgs); |
1358 | s->shared_sigalgs = NULL; | |
1359 | s->shared_sigalgslen = 0; | |
9195ddcd DSH |
1360 | /* Clear certificate validity flags */ |
1361 | for (i = 0; i < SSL_PKEY_NUM; i++) | |
555cbb32 | 1362 | s->s3.tmp.valid_flags[i] = 0; |
a8bb912d DSH |
1363 | /* |
1364 | * If peer sent no signature algorithms check to see if we support | |
1365 | * the default algorithm for each certificate type | |
1366 | */ | |
555cbb32 TS |
1367 | if (s->s3.tmp.peer_cert_sigalgs == NULL |
1368 | && s->s3.tmp.peer_sigalgs == NULL) { | |
a8bb912d DSH |
1369 | const uint16_t *sent_sigs; |
1370 | size_t sent_sigslen = tls12_get_psigalgs(s, 1, &sent_sigs); | |
0f113f3e | 1371 | |
a8bb912d DSH |
1372 | for (i = 0; i < SSL_PKEY_NUM; i++) { |
1373 | const SIGALG_LOOKUP *lu = tls1_get_legacy_sigalg(s, i); | |
1374 | size_t j; | |
1375 | ||
1376 | if (lu == NULL) | |
1377 | continue; | |
1378 | /* Check default matches a type we sent */ | |
1379 | for (j = 0; j < sent_sigslen; j++) { | |
1380 | if (lu->sigalg == sent_sigs[j]) { | |
555cbb32 | 1381 | s->s3.tmp.valid_flags[i] = CERT_PKEY_SIGN; |
a8bb912d DSH |
1382 | break; |
1383 | } | |
1384 | } | |
1385 | } | |
9195ddcd | 1386 | return 1; |
a8bb912d | 1387 | } |
9195ddcd DSH |
1388 | |
1389 | if (!tls1_process_sigalgs(s)) { | |
f63a17d6 MC |
1390 | SSLfatal(s, SSL_AD_INTERNAL_ERROR, |
1391 | SSL_F_TLS1_SET_SERVER_SIGALGS, ERR_R_INTERNAL_ERROR); | |
1392 | return 0; | |
d376e57d | 1393 | } |
29948ac8 | 1394 | if (s->shared_sigalgs != NULL) |
9195ddcd | 1395 | return 1; |
f63a17d6 | 1396 | |
fb34a0f4 | 1397 | /* Fatal error if no shared signature algorithms */ |
f63a17d6 MC |
1398 | SSLfatal(s, SSL_AD_HANDSHAKE_FAILURE, SSL_F_TLS1_SET_SERVER_SIGALGS, |
1399 | SSL_R_NO_SHARED_SIGNATURE_ALGORITHMS); | |
0f113f3e MC |
1400 | return 0; |
1401 | } | |
e469af8d | 1402 | |
1d97c843 | 1403 | /*- |
1ab3836b | 1404 | * Gets the ticket information supplied by the client if any. |
e7f0d921 | 1405 | * |
1ab3836b | 1406 | * hello: The parsed ClientHello data |
c519e89f BM |
1407 | * ret: (output) on return, if a ticket was decrypted, then this is set to |
1408 | * point to the resulting session. | |
6434abbf | 1409 | */ |
61fb5923 | 1410 | SSL_TICKET_STATUS tls_get_ticket_from_client(SSL *s, CLIENTHELLO_MSG *hello, |
df0fed9a | 1411 | SSL_SESSION **ret) |
0f113f3e | 1412 | { |
1ab3836b MC |
1413 | size_t size; |
1414 | RAW_EXTENSION *ticketext; | |
e7f0d921 | 1415 | |
0f113f3e | 1416 | *ret = NULL; |
aff8c126 | 1417 | s->ext.ticket_expected = 0; |
0f113f3e MC |
1418 | |
1419 | /* | |
9362c93e MC |
1420 | * If tickets disabled or not supported by the protocol version |
1421 | * (e.g. TLSv1.3) behave as if no ticket present to permit stateful | |
0f113f3e MC |
1422 | * resumption. |
1423 | */ | |
1ab3836b | 1424 | if (s->version <= SSL3_VERSION || !tls_use_ticket(s)) |
df0fed9a | 1425 | return SSL_TICKET_NONE; |
9ceb2426 | 1426 | |
70af3d8e MC |
1427 | ticketext = &hello->pre_proc_exts[TLSEXT_IDX_session_ticket]; |
1428 | if (!ticketext->present) | |
df0fed9a | 1429 | return SSL_TICKET_NONE; |
1ab3836b MC |
1430 | |
1431 | size = PACKET_remaining(&ticketext->data); | |
70af3d8e | 1432 | |
c0638ade | 1433 | return tls_decrypt_ticket(s, PACKET_data(&ticketext->data), size, |
70af3d8e | 1434 | hello->session_id, hello->session_id_len, ret); |
1ab3836b MC |
1435 | } |
1436 | ||
1d97c843 TH |
1437 | /*- |
1438 | * tls_decrypt_ticket attempts to decrypt a session ticket. | |
c519e89f | 1439 | * |
61fb5923 MC |
1440 | * If s->tls_session_secret_cb is set and we're not doing TLSv1.3 then we are |
1441 | * expecting a pre-shared key ciphersuite, in which case we have no use for | |
1442 | * session tickets and one will never be decrypted, nor will | |
1443 | * s->ext.ticket_expected be set to 1. | |
1444 | * | |
1445 | * Side effects: | |
1446 | * Sets s->ext.ticket_expected to 1 if the server will have to issue | |
1447 | * a new session ticket to the client because the client indicated support | |
1448 | * (and s->tls_session_secret_cb is NULL) but the client either doesn't have | |
1449 | * a session ticket or we couldn't use the one it gave us, or if | |
1450 | * s->ctx->ext.ticket_key_cb asked to renew the client's ticket. | |
1451 | * Otherwise, s->ext.ticket_expected is set to 0. | |
1452 | * | |
c519e89f | 1453 | * etick: points to the body of the session ticket extension. |
8483a003 | 1454 | * eticklen: the length of the session tickets extension. |
c519e89f BM |
1455 | * sess_id: points at the session ID. |
1456 | * sesslen: the length of the session ID. | |
1457 | * psess: (output) on return, if a ticket was decrypted, then this is set to | |
1458 | * point to the resulting session. | |
c519e89f | 1459 | */ |
61fb5923 | 1460 | SSL_TICKET_STATUS tls_decrypt_ticket(SSL *s, const unsigned char *etick, |
df0fed9a TS |
1461 | size_t eticklen, const unsigned char *sess_id, |
1462 | size_t sesslen, SSL_SESSION **psess) | |
0f113f3e | 1463 | { |
61fb5923 | 1464 | SSL_SESSION *sess = NULL; |
0f113f3e MC |
1465 | unsigned char *sdec; |
1466 | const unsigned char *p; | |
ddf6ec00 | 1467 | int slen, renew_ticket = 0, declen; |
61fb5923 | 1468 | SSL_TICKET_STATUS ret = SSL_TICKET_FATAL_ERR_OTHER; |
348240c6 | 1469 | size_t mlen; |
0f113f3e | 1470 | unsigned char tick_hmac[EVP_MAX_MD_SIZE]; |
a76ce286 | 1471 | SSL_HMAC *hctx = NULL; |
ee763495 | 1472 | EVP_CIPHER_CTX *ctx = NULL; |
222da979 | 1473 | SSL_CTX *tctx = s->session_ctx; |
e97763c9 | 1474 | |
61fb5923 MC |
1475 | if (eticklen == 0) { |
1476 | /* | |
1477 | * The client will accept a ticket but doesn't currently have | |
1478 | * one (TLSv1.2 and below), or treated as a fatal error in TLSv1.3 | |
1479 | */ | |
1480 | ret = SSL_TICKET_EMPTY; | |
1481 | goto end; | |
1482 | } | |
1483 | if (!SSL_IS_TLS13(s) && s->ext.session_secret_cb) { | |
1484 | /* | |
1485 | * Indicate that the ticket couldn't be decrypted rather than | |
1486 | * generating the session from ticket now, trigger | |
1487 | * abbreviated handshake based on external mechanism to | |
1488 | * calculate the master secret later. | |
1489 | */ | |
1490 | ret = SSL_TICKET_NO_DECRYPT; | |
1491 | goto end; | |
1492 | } | |
1493 | ||
ee763495 MC |
1494 | /* Need at least keyname + iv */ |
1495 | if (eticklen < TLSEXT_KEYNAME_LENGTH + EVP_MAX_IV_LENGTH) { | |
df0fed9a | 1496 | ret = SSL_TICKET_NO_DECRYPT; |
c0638ade | 1497 | goto end; |
ee763495 MC |
1498 | } |
1499 | ||
0f113f3e | 1500 | /* Initialize session ticket encryption and HMAC contexts */ |
a76ce286 | 1501 | hctx = ssl_hmac_new(tctx); |
c0638ade MC |
1502 | if (hctx == NULL) { |
1503 | ret = SSL_TICKET_FATAL_ERR_MALLOC; | |
1504 | goto end; | |
1505 | } | |
846ec07d | 1506 | ctx = EVP_CIPHER_CTX_new(); |
35b1a433 | 1507 | if (ctx == NULL) { |
df0fed9a | 1508 | ret = SSL_TICKET_FATAL_ERR_MALLOC; |
c0638ade | 1509 | goto end; |
35b1a433 | 1510 | } |
a76ce286 P |
1511 | #ifndef OPENSSL_NO_DEPRECATED_3_0 |
1512 | if (tctx->ext.ticket_key_evp_cb != NULL || tctx->ext.ticket_key_cb != NULL) | |
1513 | #else | |
1514 | if (tctx->ext.ticket_key_evp_cb != NULL) | |
1515 | #endif | |
1516 | { | |
0f113f3e | 1517 | unsigned char *nctick = (unsigned char *)etick; |
a76ce286 P |
1518 | int rv = 0; |
1519 | ||
1520 | if (tctx->ext.ticket_key_evp_cb != NULL) | |
1521 | rv = tctx->ext.ticket_key_evp_cb(s, nctick, | |
1522 | nctick + TLSEXT_KEYNAME_LENGTH, | |
1523 | ctx, | |
1524 | ssl_hmac_get0_EVP_MAC_CTX(hctx), | |
1525 | 0); | |
1526 | #ifndef OPENSSL_NO_DEPRECATED_3_0 | |
1527 | else if (tctx->ext.ticket_key_cb != NULL) | |
1528 | /* if 0 is returned, write an empty ticket */ | |
1529 | rv = tctx->ext.ticket_key_cb(s, nctick, | |
ee763495 | 1530 | nctick + TLSEXT_KEYNAME_LENGTH, |
a76ce286 P |
1531 | ctx, ssl_hmac_get0_HMAC_CTX(hctx), 0); |
1532 | #endif | |
c0638ade MC |
1533 | if (rv < 0) { |
1534 | ret = SSL_TICKET_FATAL_ERR_OTHER; | |
1535 | goto end; | |
1536 | } | |
35b1a433 | 1537 | if (rv == 0) { |
df0fed9a | 1538 | ret = SSL_TICKET_NO_DECRYPT; |
c0638ade | 1539 | goto end; |
35b1a433 | 1540 | } |
0f113f3e MC |
1541 | if (rv == 2) |
1542 | renew_ticket = 1; | |
1543 | } else { | |
148bfd26 MC |
1544 | EVP_CIPHER *aes256cbc = NULL; |
1545 | ||
0f113f3e | 1546 | /* Check key name matches */ |
aff8c126 | 1547 | if (memcmp(etick, tctx->ext.tick_key_name, |
ee763495 | 1548 | TLSEXT_KEYNAME_LENGTH) != 0) { |
df0fed9a | 1549 | ret = SSL_TICKET_NO_DECRYPT; |
c0638ade | 1550 | goto end; |
35b1a433 | 1551 | } |
148bfd26 MC |
1552 | |
1553 | aes256cbc = EVP_CIPHER_fetch(s->ctx->libctx, "AES-256-CBC", | |
1554 | s->ctx->propq); | |
1555 | if (aes256cbc == NULL | |
1556 | || ssl_hmac_init(hctx, tctx->ext.secure->tick_hmac_key, | |
1557 | sizeof(tctx->ext.secure->tick_hmac_key), | |
1558 | "SHA256") <= 0 | |
1559 | || EVP_DecryptInit_ex(ctx, aes256cbc, NULL, | |
4bfb96f2 | 1560 | tctx->ext.secure->tick_aes_key, |
ee763495 | 1561 | etick + TLSEXT_KEYNAME_LENGTH) <= 0) { |
148bfd26 | 1562 | EVP_CIPHER_free(aes256cbc); |
c0638ade MC |
1563 | ret = SSL_TICKET_FATAL_ERR_OTHER; |
1564 | goto end; | |
a230b26e | 1565 | } |
148bfd26 | 1566 | EVP_CIPHER_free(aes256cbc); |
c0638ade MC |
1567 | if (SSL_IS_TLS13(s)) |
1568 | renew_ticket = 1; | |
0f113f3e MC |
1569 | } |
1570 | /* | |
1571 | * Attempt to process session ticket, first conduct sanity and integrity | |
1572 | * checks on ticket. | |
1573 | */ | |
a76ce286 | 1574 | mlen = ssl_hmac_size(hctx); |
348240c6 | 1575 | if (mlen == 0) { |
c0638ade MC |
1576 | ret = SSL_TICKET_FATAL_ERR_OTHER; |
1577 | goto end; | |
0f113f3e | 1578 | } |
c0638ade | 1579 | |
e97763c9 DSH |
1580 | /* Sanity check ticket length: must exceed keyname + IV + HMAC */ |
1581 | if (eticklen <= | |
348240c6 | 1582 | TLSEXT_KEYNAME_LENGTH + EVP_CIPHER_CTX_iv_length(ctx) + mlen) { |
df0fed9a | 1583 | ret = SSL_TICKET_NO_DECRYPT; |
c0638ade | 1584 | goto end; |
e97763c9 | 1585 | } |
0f113f3e MC |
1586 | eticklen -= mlen; |
1587 | /* Check HMAC of encrypted ticket */ | |
a76ce286 P |
1588 | if (ssl_hmac_update(hctx, etick, eticklen) <= 0 |
1589 | || ssl_hmac_final(hctx, tick_hmac, NULL, sizeof(tick_hmac)) <= 0) { | |
c0638ade MC |
1590 | ret = SSL_TICKET_FATAL_ERR_OTHER; |
1591 | goto end; | |
5f3d93e4 | 1592 | } |
c0638ade | 1593 | |
0f113f3e | 1594 | if (CRYPTO_memcmp(tick_hmac, etick + eticklen, mlen)) { |
c0638ade MC |
1595 | ret = SSL_TICKET_NO_DECRYPT; |
1596 | goto end; | |
0f113f3e MC |
1597 | } |
1598 | /* Attempt to decrypt session data */ | |
1599 | /* Move p after IV to start of encrypted ticket, update length */ | |
57b0d651 BE |
1600 | p = etick + TLSEXT_KEYNAME_LENGTH + EVP_CIPHER_CTX_iv_length(ctx); |
1601 | eticklen -= TLSEXT_KEYNAME_LENGTH + EVP_CIPHER_CTX_iv_length(ctx); | |
0f113f3e | 1602 | sdec = OPENSSL_malloc(eticklen); |
348240c6 MC |
1603 | if (sdec == NULL || EVP_DecryptUpdate(ctx, sdec, &slen, p, |
1604 | (int)eticklen) <= 0) { | |
d1247df2 | 1605 | OPENSSL_free(sdec); |
c0638ade MC |
1606 | ret = SSL_TICKET_FATAL_ERR_OTHER; |
1607 | goto end; | |
0f113f3e | 1608 | } |
348240c6 | 1609 | if (EVP_DecryptFinal(ctx, sdec + slen, &declen) <= 0) { |
0f113f3e | 1610 | OPENSSL_free(sdec); |
c0638ade MC |
1611 | ret = SSL_TICKET_NO_DECRYPT; |
1612 | goto end; | |
0f113f3e | 1613 | } |
348240c6 | 1614 | slen += declen; |
0f113f3e MC |
1615 | p = sdec; |
1616 | ||
1617 | sess = d2i_SSL_SESSION(NULL, &p, slen); | |
d3bc9805 | 1618 | slen -= p - sdec; |
0f113f3e MC |
1619 | OPENSSL_free(sdec); |
1620 | if (sess) { | |
79020b27 | 1621 | /* Some additional consistency checks */ |
32305f88 | 1622 | if (slen != 0) { |
79020b27 | 1623 | SSL_SESSION_free(sess); |
5f96a95e | 1624 | sess = NULL; |
c0638ade MC |
1625 | ret = SSL_TICKET_NO_DECRYPT; |
1626 | goto end; | |
79020b27 | 1627 | } |
0f113f3e MC |
1628 | /* |
1629 | * The session ID, if non-empty, is used by some clients to detect | |
1630 | * that the ticket has been accepted. So we copy it to the session | |
1631 | * structure. If it is empty set length to zero as required by | |
1632 | * standard. | |
1633 | */ | |
32305f88 | 1634 | if (sesslen) { |
0f113f3e | 1635 | memcpy(sess->session_id, sess_id, sesslen); |
32305f88 MC |
1636 | sess->session_id_length = sesslen; |
1637 | } | |
0f113f3e | 1638 | if (renew_ticket) |
c0638ade | 1639 | ret = SSL_TICKET_SUCCESS_RENEW; |
0f113f3e | 1640 | else |
c0638ade MC |
1641 | ret = SSL_TICKET_SUCCESS; |
1642 | goto end; | |
0f113f3e MC |
1643 | } |
1644 | ERR_clear_error(); | |
1645 | /* | |
1646 | * For session parse failure, indicate that we need to send a new ticket. | |
1647 | */ | |
c0638ade MC |
1648 | ret = SSL_TICKET_NO_DECRYPT; |
1649 | ||
1650 | end: | |
846ec07d | 1651 | EVP_CIPHER_CTX_free(ctx); |
a76ce286 | 1652 | ssl_hmac_free(hctx); |
c0638ade MC |
1653 | |
1654 | /* | |
61fb5923 MC |
1655 | * If set, the decrypt_ticket_cb() is called unless a fatal error was |
1656 | * detected above. The callback is responsible for checking |ret| before it | |
1657 | * performs any action | |
c0638ade | 1658 | */ |
61fb5923 MC |
1659 | if (s->session_ctx->decrypt_ticket_cb != NULL |
1660 | && (ret == SSL_TICKET_EMPTY | |
1661 | || ret == SSL_TICKET_NO_DECRYPT | |
1662 | || ret == SSL_TICKET_SUCCESS | |
1663 | || ret == SSL_TICKET_SUCCESS_RENEW)) { | |
c0638ade | 1664 | size_t keyname_len = eticklen; |
61fb5923 | 1665 | int retcb; |
c0638ade MC |
1666 | |
1667 | if (keyname_len > TLSEXT_KEYNAME_LENGTH) | |
1668 | keyname_len = TLSEXT_KEYNAME_LENGTH; | |
61fb5923 MC |
1669 | retcb = s->session_ctx->decrypt_ticket_cb(s, sess, etick, keyname_len, |
1670 | ret, | |
1671 | s->session_ctx->ticket_cb_data); | |
1672 | switch (retcb) { | |
1673 | case SSL_TICKET_RETURN_ABORT: | |
1674 | ret = SSL_TICKET_FATAL_ERR_OTHER; | |
1675 | break; | |
1676 | ||
1677 | case SSL_TICKET_RETURN_IGNORE: | |
1678 | ret = SSL_TICKET_NONE; | |
1679 | SSL_SESSION_free(sess); | |
1680 | sess = NULL; | |
1681 | break; | |
1682 | ||
1683 | case SSL_TICKET_RETURN_IGNORE_RENEW: | |
1684 | if (ret != SSL_TICKET_EMPTY && ret != SSL_TICKET_NO_DECRYPT) | |
1685 | ret = SSL_TICKET_NO_DECRYPT; | |
1686 | /* else the value of |ret| will already do the right thing */ | |
1687 | SSL_SESSION_free(sess); | |
1688 | sess = NULL; | |
1689 | break; | |
1690 | ||
1691 | case SSL_TICKET_RETURN_USE: | |
1692 | case SSL_TICKET_RETURN_USE_RENEW: | |
1693 | if (ret != SSL_TICKET_SUCCESS | |
1694 | && ret != SSL_TICKET_SUCCESS_RENEW) | |
1695 | ret = SSL_TICKET_FATAL_ERR_OTHER; | |
1696 | else if (retcb == SSL_TICKET_RETURN_USE) | |
1697 | ret = SSL_TICKET_SUCCESS; | |
1698 | else | |
1699 | ret = SSL_TICKET_SUCCESS_RENEW; | |
1700 | break; | |
1701 | ||
1702 | default: | |
1703 | ret = SSL_TICKET_FATAL_ERR_OTHER; | |
1704 | } | |
c0638ade MC |
1705 | } |
1706 | ||
309371d6 MC |
1707 | if (s->ext.session_secret_cb == NULL || SSL_IS_TLS13(s)) { |
1708 | switch (ret) { | |
1709 | case SSL_TICKET_NO_DECRYPT: | |
1710 | case SSL_TICKET_SUCCESS_RENEW: | |
1711 | case SSL_TICKET_EMPTY: | |
1712 | s->ext.ticket_expected = 1; | |
1713 | } | |
c0638ade MC |
1714 | } |
1715 | ||
61fb5923 MC |
1716 | *psess = sess; |
1717 | ||
1718 | return ret; | |
0f113f3e | 1719 | } |
6434abbf | 1720 | |
b362ccab | 1721 | /* Check to see if a signature algorithm is allowed */ |
b0031e5d | 1722 | static int tls12_sigalg_allowed(const SSL *s, int op, const SIGALG_LOOKUP *lu) |
0f113f3e | 1723 | { |
703bcee0 | 1724 | unsigned char sigalgstr[2]; |
44b6318f | 1725 | int secbits; |
703bcee0 | 1726 | |
44b6318f | 1727 | /* See if sigalgs is recognised and if hash is enabled */ |
c8f6c28a | 1728 | if (!tls1_lookup_md(s->ctx, lu, NULL)) |
0f113f3e | 1729 | return 0; |
224b4e37 DSH |
1730 | /* DSA is not allowed in TLS 1.3 */ |
1731 | if (SSL_IS_TLS13(s) && lu->sig == EVP_PKEY_DSA) | |
1732 | return 0; | |
6ffeb269 | 1733 | /* TODO(OpenSSL1.2) fully axe DSA/etc. in ClientHello per TLS 1.3 spec */ |
555cbb32 | 1734 | if (!s->server && !SSL_IS_DTLS(s) && s->s3.tmp.min_ver >= TLS1_3_VERSION |
6ffeb269 BK |
1735 | && (lu->sig == EVP_PKEY_DSA || lu->hash_idx == SSL_MD_SHA1_IDX |
1736 | || lu->hash_idx == SSL_MD_MD5_IDX | |
1737 | || lu->hash_idx == SSL_MD_SHA224_IDX)) | |
1738 | return 0; | |
871980a9 | 1739 | |
0f113f3e | 1740 | /* See if public key algorithm allowed */ |
b8858aec | 1741 | if (ssl_cert_is_disabled(lu->sig_idx)) |
0f113f3e | 1742 | return 0; |
871980a9 MC |
1743 | |
1744 | if (lu->sig == NID_id_GostR3410_2012_256 | |
1745 | || lu->sig == NID_id_GostR3410_2012_512 | |
1746 | || lu->sig == NID_id_GostR3410_2001) { | |
1747 | /* We never allow GOST sig algs on the server with TLSv1.3 */ | |
1748 | if (s->server && SSL_IS_TLS13(s)) | |
1749 | return 0; | |
1750 | if (!s->server | |
1751 | && s->method->version == TLS_ANY_VERSION | |
555cbb32 | 1752 | && s->s3.tmp.max_ver >= TLS1_3_VERSION) { |
871980a9 MC |
1753 | int i, num; |
1754 | STACK_OF(SSL_CIPHER) *sk; | |
1755 | ||
1756 | /* | |
1757 | * We're a client that could negotiate TLSv1.3. We only allow GOST | |
1758 | * sig algs if we could negotiate TLSv1.2 or below and we have GOST | |
1759 | * ciphersuites enabled. | |
1760 | */ | |
1761 | ||
555cbb32 | 1762 | if (s->s3.tmp.min_ver >= TLS1_3_VERSION) |
871980a9 MC |
1763 | return 0; |
1764 | ||
1765 | sk = SSL_get_ciphers(s); | |
1766 | num = sk != NULL ? sk_SSL_CIPHER_num(sk) : 0; | |
1767 | for (i = 0; i < num; i++) { | |
1768 | const SSL_CIPHER *c; | |
1769 | ||
1770 | c = sk_SSL_CIPHER_value(sk, i); | |
1771 | /* Skip disabled ciphers */ | |
1772 | if (ssl_cipher_disabled(s, c, SSL_SECOP_CIPHER_SUPPORTED, 0)) | |
1773 | continue; | |
1774 | ||
1775 | if ((c->algorithm_mkey & SSL_kGOST) != 0) | |
1776 | break; | |
1777 | } | |
1778 | if (i == num) | |
1779 | return 0; | |
1780 | } | |
1781 | } | |
1782 | ||
0f113f3e | 1783 | /* Finally see if security callback allows it */ |
620c97b6 | 1784 | secbits = sigalg_security_bits(s->ctx, lu); |
b0e9ab95 DSH |
1785 | sigalgstr[0] = (lu->sigalg >> 8) & 0xff; |
1786 | sigalgstr[1] = lu->sigalg & 0xff; | |
44b6318f | 1787 | return ssl_security(s, op, secbits, lu->hash, (void *)sigalgstr); |
0f113f3e MC |
1788 | } |
1789 | ||
1790 | /* | |
1791 | * Get a mask of disabled public key algorithms based on supported signature | |
1792 | * algorithms. For example if no signature algorithm supports RSA then RSA is | |
1793 | * disabled. | |
b362ccab DSH |
1794 | */ |
1795 | ||
90d9e49a | 1796 | void ssl_set_sig_mask(uint32_t *pmask_a, SSL *s, int op) |
0f113f3e | 1797 | { |
98c792d1 | 1798 | const uint16_t *sigalgs; |
0f113f3e | 1799 | size_t i, sigalgslen; |
13cc2574 | 1800 | uint32_t disabled_mask = SSL_aRSA | SSL_aDSS | SSL_aECDSA; |
0f113f3e | 1801 | /* |
13cc2574 DSH |
1802 | * Go through all signature algorithms seeing if we support any |
1803 | * in disabled_mask. | |
0f113f3e | 1804 | */ |
a9669ddc | 1805 | sigalgslen = tls12_get_psigalgs(s, 1, &sigalgs); |
b2555168 | 1806 | for (i = 0; i < sigalgslen; i++, sigalgs++) { |
b0e9ab95 | 1807 | const SIGALG_LOOKUP *lu = tls1_lookup_sigalg(*sigalgs); |
13cc2574 | 1808 | const SSL_CERT_LOOKUP *clu; |
b0e9ab95 DSH |
1809 | |
1810 | if (lu == NULL) | |
1811 | continue; | |
13cc2574 DSH |
1812 | |
1813 | clu = ssl_cert_lookup_by_idx(lu->sig_idx); | |
dd6b2706 P |
1814 | if (clu == NULL) |
1815 | continue; | |
13cc2574 DSH |
1816 | |
1817 | /* If algorithm is disabled see if we can enable it */ | |
1818 | if ((clu->amask & disabled_mask) != 0 | |
1819 | && tls12_sigalg_allowed(s, op, lu)) | |
1820 | disabled_mask &= ~clu->amask; | |
0f113f3e | 1821 | } |
13cc2574 | 1822 | *pmask_a |= disabled_mask; |
0f113f3e | 1823 | } |
b362ccab | 1824 | |
ae2f7b37 | 1825 | int tls12_copy_sigalgs(SSL *s, WPACKET *pkt, |
98c792d1 | 1826 | const uint16_t *psig, size_t psiglen) |
2c7b4dbc MC |
1827 | { |
1828 | size_t i; | |
b0e9ab95 | 1829 | int rv = 0; |
c0f9e23c | 1830 | |
703bcee0 | 1831 | for (i = 0; i < psiglen; i++, psig++) { |
b0e9ab95 DSH |
1832 | const SIGALG_LOOKUP *lu = tls1_lookup_sigalg(*psig); |
1833 | ||
1834 | if (!tls12_sigalg_allowed(s, SSL_SECOP_SIGALG_SUPPORTED, lu)) | |
1835 | continue; | |
1836 | if (!WPACKET_put_bytes_u16(pkt, *psig)) | |
1837 | return 0; | |
1838 | /* | |
1839 | * If TLS 1.3 must have at least one valid TLS 1.3 message | |
d8311fc9 | 1840 | * signing algorithm: i.e. neither RSA nor SHA1/SHA224 |
b0e9ab95 DSH |
1841 | */ |
1842 | if (rv == 0 && (!SSL_IS_TLS13(s) | |
d8311fc9 MC |
1843 | || (lu->sig != EVP_PKEY_RSA |
1844 | && lu->hash != NID_sha1 | |
1845 | && lu->hash != NID_sha224))) | |
b0e9ab95 | 1846 | rv = 1; |
2c7b4dbc | 1847 | } |
5528d68f DSH |
1848 | if (rv == 0) |
1849 | SSLerr(SSL_F_TLS12_COPY_SIGALGS, SSL_R_NO_SUITABLE_SIGNATURE_ALGORITHM); | |
b0e9ab95 | 1850 | return rv; |
2c7b4dbc MC |
1851 | } |
1852 | ||
4453cd8c | 1853 | /* Given preference and allowed sigalgs set shared sigalgs */ |
4d43ee28 | 1854 | static size_t tls12_shared_sigalgs(SSL *s, const SIGALG_LOOKUP **shsig, |
98c792d1 DSH |
1855 | const uint16_t *pref, size_t preflen, |
1856 | const uint16_t *allow, size_t allowlen) | |
0f113f3e | 1857 | { |
98c792d1 | 1858 | const uint16_t *ptmp, *atmp; |
0f113f3e | 1859 | size_t i, j, nmatch = 0; |
703bcee0 | 1860 | for (i = 0, ptmp = pref; i < preflen; i++, ptmp++) { |
b0e9ab95 DSH |
1861 | const SIGALG_LOOKUP *lu = tls1_lookup_sigalg(*ptmp); |
1862 | ||
0f113f3e | 1863 | /* Skip disabled hashes or signature algorithms */ |
b0e9ab95 | 1864 | if (!tls12_sigalg_allowed(s, SSL_SECOP_SIGALG_SHARED, lu)) |
0f113f3e | 1865 | continue; |
703bcee0 MC |
1866 | for (j = 0, atmp = allow; j < allowlen; j++, atmp++) { |
1867 | if (*ptmp == *atmp) { | |
0f113f3e | 1868 | nmatch++; |
b0e9ab95 DSH |
1869 | if (shsig) |
1870 | *shsig++ = lu; | |
0f113f3e MC |
1871 | break; |
1872 | } | |
1873 | } | |
1874 | } | |
1875 | return nmatch; | |
1876 | } | |
4453cd8c DSH |
1877 | |
1878 | /* Set shared signature algorithms for SSL structures */ | |
1879 | static int tls1_set_shared_sigalgs(SSL *s) | |
0f113f3e | 1880 | { |
98c792d1 | 1881 | const uint16_t *pref, *allow, *conf; |
0f113f3e MC |
1882 | size_t preflen, allowlen, conflen; |
1883 | size_t nmatch; | |
4d43ee28 | 1884 | const SIGALG_LOOKUP **salgs = NULL; |
0f113f3e MC |
1885 | CERT *c = s->cert; |
1886 | unsigned int is_suiteb = tls1_suiteb(s); | |
b548a1f1 | 1887 | |
29948ac8 BK |
1888 | OPENSSL_free(s->shared_sigalgs); |
1889 | s->shared_sigalgs = NULL; | |
1890 | s->shared_sigalgslen = 0; | |
0f113f3e MC |
1891 | /* If client use client signature algorithms if not NULL */ |
1892 | if (!s->server && c->client_sigalgs && !is_suiteb) { | |
1893 | conf = c->client_sigalgs; | |
1894 | conflen = c->client_sigalgslen; | |
1895 | } else if (c->conf_sigalgs && !is_suiteb) { | |
1896 | conf = c->conf_sigalgs; | |
1897 | conflen = c->conf_sigalgslen; | |
1898 | } else | |
a9669ddc | 1899 | conflen = tls12_get_psigalgs(s, 0, &conf); |
0f113f3e MC |
1900 | if (s->options & SSL_OP_CIPHER_SERVER_PREFERENCE || is_suiteb) { |
1901 | pref = conf; | |
1902 | preflen = conflen; | |
555cbb32 TS |
1903 | allow = s->s3.tmp.peer_sigalgs; |
1904 | allowlen = s->s3.tmp.peer_sigalgslen; | |
0f113f3e MC |
1905 | } else { |
1906 | allow = conf; | |
1907 | allowlen = conflen; | |
555cbb32 TS |
1908 | pref = s->s3.tmp.peer_sigalgs; |
1909 | preflen = s->s3.tmp.peer_sigalgslen; | |
0f113f3e MC |
1910 | } |
1911 | nmatch = tls12_shared_sigalgs(s, NULL, pref, preflen, allow, allowlen); | |
34e3edbf | 1912 | if (nmatch) { |
cdb10bae RS |
1913 | if ((salgs = OPENSSL_malloc(nmatch * sizeof(*salgs))) == NULL) { |
1914 | SSLerr(SSL_F_TLS1_SET_SHARED_SIGALGS, ERR_R_MALLOC_FAILURE); | |
34e3edbf | 1915 | return 0; |
cdb10bae | 1916 | } |
34e3edbf DSH |
1917 | nmatch = tls12_shared_sigalgs(s, salgs, pref, preflen, allow, allowlen); |
1918 | } else { | |
1919 | salgs = NULL; | |
1920 | } | |
29948ac8 BK |
1921 | s->shared_sigalgs = salgs; |
1922 | s->shared_sigalgslen = nmatch; | |
0f113f3e MC |
1923 | return 1; |
1924 | } | |
4453cd8c | 1925 | |
9e84a42d | 1926 | int tls1_save_u16(PACKET *pkt, uint16_t **pdest, size_t *pdestlen) |
0f113f3e | 1927 | { |
98c792d1 | 1928 | unsigned int stmp; |
703bcee0 | 1929 | size_t size, i; |
9e84a42d | 1930 | uint16_t *buf; |
0f113f3e | 1931 | |
703bcee0 MC |
1932 | size = PACKET_remaining(pkt); |
1933 | ||
1934 | /* Invalid data length */ | |
8f12296e | 1935 | if (size == 0 || (size & 1) != 0) |
703bcee0 MC |
1936 | return 0; |
1937 | ||
1938 | size >>= 1; | |
1939 | ||
cdb10bae RS |
1940 | if ((buf = OPENSSL_malloc(size * sizeof(*buf))) == NULL) { |
1941 | SSLerr(SSL_F_TLS1_SAVE_U16, ERR_R_MALLOC_FAILURE); | |
0f113f3e | 1942 | return 0; |
cdb10bae | 1943 | } |
98c792d1 | 1944 | for (i = 0; i < size && PACKET_get_net_2(pkt, &stmp); i++) |
9e84a42d | 1945 | buf[i] = stmp; |
703bcee0 | 1946 | |
9e84a42d DSH |
1947 | if (i != size) { |
1948 | OPENSSL_free(buf); | |
703bcee0 | 1949 | return 0; |
9e84a42d DSH |
1950 | } |
1951 | ||
1952 | OPENSSL_free(*pdest); | |
1953 | *pdest = buf; | |
1954 | *pdestlen = size; | |
703bcee0 | 1955 | |
0f113f3e MC |
1956 | return 1; |
1957 | } | |
6b7be581 | 1958 | |
c589c34e | 1959 | int tls1_save_sigalgs(SSL *s, PACKET *pkt, int cert) |
9e84a42d DSH |
1960 | { |
1961 | /* Extension ignored for inappropriate versions */ | |
1962 | if (!SSL_USE_SIGALGS(s)) | |
1963 | return 1; | |
1964 | /* Should never happen */ | |
1965 | if (s->cert == NULL) | |
1966 | return 0; | |
1967 | ||
c589c34e | 1968 | if (cert) |
555cbb32 TS |
1969 | return tls1_save_u16(pkt, &s->s3.tmp.peer_cert_sigalgs, |
1970 | &s->s3.tmp.peer_cert_sigalgslen); | |
c589c34e | 1971 | else |
555cbb32 TS |
1972 | return tls1_save_u16(pkt, &s->s3.tmp.peer_sigalgs, |
1973 | &s->s3.tmp.peer_sigalgslen); | |
9e84a42d | 1974 | |
9e84a42d DSH |
1975 | } |
1976 | ||
1977 | /* Set preferred digest for each key type */ | |
1978 | ||
c800c27a | 1979 | int tls1_process_sigalgs(SSL *s) |
0f113f3e | 1980 | { |
0f113f3e | 1981 | size_t i; |
555cbb32 | 1982 | uint32_t *pvalid = s->s3.tmp.valid_flags; |
4d43ee28 | 1983 | |
0f113f3e MC |
1984 | if (!tls1_set_shared_sigalgs(s)) |
1985 | return 0; | |
1986 | ||
9195ddcd DSH |
1987 | for (i = 0; i < SSL_PKEY_NUM; i++) |
1988 | pvalid[i] = 0; | |
1989 | ||
29948ac8 BK |
1990 | for (i = 0; i < s->shared_sigalgslen; i++) { |
1991 | const SIGALG_LOOKUP *sigptr = s->shared_sigalgs[i]; | |
9195ddcd | 1992 | int idx = sigptr->sig_idx; |
4d43ee28 | 1993 | |
523fb323 | 1994 | /* Ignore PKCS1 based sig algs in TLSv1.3 */ |
4d43ee28 | 1995 | if (SSL_IS_TLS13(s) && sigptr->sig == EVP_PKEY_RSA) |
523fb323 | 1996 | continue; |
9195ddcd | 1997 | /* If not disabled indicate we can explicitly sign */ |
b8858aec DSH |
1998 | if (pvalid[idx] == 0 && !ssl_cert_is_disabled(idx)) |
1999 | pvalid[idx] = CERT_PKEY_EXPLICIT_SIGN | CERT_PKEY_SIGN; | |
0f113f3e MC |
2000 | } |
2001 | return 1; | |
2002 | } | |
4817504d | 2003 | |
e7f8ff43 | 2004 | int SSL_get_sigalgs(SSL *s, int idx, |
0f113f3e MC |
2005 | int *psign, int *phash, int *psignhash, |
2006 | unsigned char *rsig, unsigned char *rhash) | |
2007 | { | |
555cbb32 TS |
2008 | uint16_t *psig = s->s3.tmp.peer_sigalgs; |
2009 | size_t numsigalgs = s->s3.tmp.peer_sigalgslen; | |
348240c6 | 2010 | if (psig == NULL || numsigalgs > INT_MAX) |
0f113f3e MC |
2011 | return 0; |
2012 | if (idx >= 0) { | |
4d43ee28 DSH |
2013 | const SIGALG_LOOKUP *lu; |
2014 | ||
703bcee0 | 2015 | if (idx >= (int)numsigalgs) |
0f113f3e MC |
2016 | return 0; |
2017 | psig += idx; | |
4d43ee28 | 2018 | if (rhash != NULL) |
536199ec | 2019 | *rhash = (unsigned char)((*psig >> 8) & 0xff); |
4d43ee28 | 2020 | if (rsig != NULL) |
536199ec | 2021 | *rsig = (unsigned char)(*psig & 0xff); |
4d43ee28 DSH |
2022 | lu = tls1_lookup_sigalg(*psig); |
2023 | if (psign != NULL) | |
2024 | *psign = lu != NULL ? lu->sig : NID_undef; | |
2025 | if (phash != NULL) | |
2026 | *phash = lu != NULL ? lu->hash : NID_undef; | |
2027 | if (psignhash != NULL) | |
2028 | *psignhash = lu != NULL ? lu->sigandhash : NID_undef; | |
0f113f3e | 2029 | } |
348240c6 | 2030 | return (int)numsigalgs; |
0f113f3e | 2031 | } |
4453cd8c DSH |
2032 | |
2033 | int SSL_get_shared_sigalgs(SSL *s, int idx, | |
0f113f3e MC |
2034 | int *psign, int *phash, int *psignhash, |
2035 | unsigned char *rsig, unsigned char *rhash) | |
2036 | { | |
4d43ee28 | 2037 | const SIGALG_LOOKUP *shsigalgs; |
29948ac8 | 2038 | if (s->shared_sigalgs == NULL |
6d047e06 | 2039 | || idx < 0 |
29948ac8 BK |
2040 | || idx >= (int)s->shared_sigalgslen |
2041 | || s->shared_sigalgslen > INT_MAX) | |
0f113f3e | 2042 | return 0; |
29948ac8 | 2043 | shsigalgs = s->shared_sigalgs[idx]; |
4d43ee28 DSH |
2044 | if (phash != NULL) |
2045 | *phash = shsigalgs->hash; | |
2046 | if (psign != NULL) | |
2047 | *psign = shsigalgs->sig; | |
2048 | if (psignhash != NULL) | |
2049 | *psignhash = shsigalgs->sigandhash; | |
2050 | if (rsig != NULL) | |
2051 | *rsig = (unsigned char)(shsigalgs->sigalg & 0xff); | |
2052 | if (rhash != NULL) | |
2053 | *rhash = (unsigned char)((shsigalgs->sigalg >> 8) & 0xff); | |
29948ac8 | 2054 | return (int)s->shared_sigalgslen; |
0f113f3e MC |
2055 | } |
2056 | ||
787ebcaf DSH |
2057 | /* Maximum possible number of unique entries in sigalgs array */ |
2058 | #define TLS_MAX_SIGALGCNT (OSSL_NELEM(sigalg_lookup_tbl) * 2) | |
0f229cce | 2059 | |
0f113f3e MC |
2060 | typedef struct { |
2061 | size_t sigalgcnt; | |
fd5e1a8c BK |
2062 | /* TLSEXT_SIGALG_XXX values */ |
2063 | uint16_t sigalgs[TLS_MAX_SIGALGCNT]; | |
0f113f3e | 2064 | } sig_cb_st; |
0f229cce | 2065 | |
431f458d DSH |
2066 | static void get_sigorhash(int *psig, int *phash, const char *str) |
2067 | { | |
2068 | if (strcmp(str, "RSA") == 0) { | |
2069 | *psig = EVP_PKEY_RSA; | |
b2eb6998 DSH |
2070 | } else if (strcmp(str, "RSA-PSS") == 0 || strcmp(str, "PSS") == 0) { |
2071 | *psig = EVP_PKEY_RSA_PSS; | |
431f458d DSH |
2072 | } else if (strcmp(str, "DSA") == 0) { |
2073 | *psig = EVP_PKEY_DSA; | |
2074 | } else if (strcmp(str, "ECDSA") == 0) { | |
2075 | *psig = EVP_PKEY_EC; | |
2076 | } else { | |
2077 | *phash = OBJ_sn2nid(str); | |
2078 | if (*phash == NID_undef) | |
2079 | *phash = OBJ_ln2nid(str); | |
2080 | } | |
2081 | } | |
787ebcaf DSH |
2082 | /* Maximum length of a signature algorithm string component */ |
2083 | #define TLS_MAX_SIGSTRING_LEN 40 | |
431f458d | 2084 | |
0f229cce | 2085 | static int sig_cb(const char *elem, int len, void *arg) |
0f113f3e MC |
2086 | { |
2087 | sig_cb_st *sarg = arg; | |
2088 | size_t i; | |
fd5e1a8c | 2089 | const SIGALG_LOOKUP *s; |
787ebcaf | 2090 | char etmp[TLS_MAX_SIGSTRING_LEN], *p; |
431f458d | 2091 | int sig_alg = NID_undef, hash_alg = NID_undef; |
2747d73c KR |
2092 | if (elem == NULL) |
2093 | return 0; | |
787ebcaf | 2094 | if (sarg->sigalgcnt == TLS_MAX_SIGALGCNT) |
0f113f3e MC |
2095 | return 0; |
2096 | if (len > (int)(sizeof(etmp) - 1)) | |
2097 | return 0; | |
2098 | memcpy(etmp, elem, len); | |
2099 | etmp[len] = 0; | |
2100 | p = strchr(etmp, '+'); | |
fd5e1a8c BK |
2101 | /* |
2102 | * We only allow SignatureSchemes listed in the sigalg_lookup_tbl; | |
2103 | * if there's no '+' in the provided name, look for the new-style combined | |
2104 | * name. If not, match both sig+hash to find the needed SIGALG_LOOKUP. | |
2105 | * Just sig+hash is not unique since TLS 1.3 adds rsa_pss_pss_* and | |
2106 | * rsa_pss_rsae_* that differ only by public key OID; in such cases | |
2107 | * we will pick the _rsae_ variant, by virtue of them appearing earlier | |
2108 | * in the table. | |
2109 | */ | |
8a43a42a | 2110 | if (p == NULL) { |
8a43a42a DSH |
2111 | for (i = 0, s = sigalg_lookup_tbl; i < OSSL_NELEM(sigalg_lookup_tbl); |
2112 | i++, s++) { | |
2113 | if (s->name != NULL && strcmp(etmp, s->name) == 0) { | |
fd5e1a8c | 2114 | sarg->sigalgs[sarg->sigalgcnt++] = s->sigalg; |
8a43a42a DSH |
2115 | break; |
2116 | } | |
2117 | } | |
fd5e1a8c BK |
2118 | if (i == OSSL_NELEM(sigalg_lookup_tbl)) |
2119 | return 0; | |
8a43a42a DSH |
2120 | } else { |
2121 | *p = 0; | |
2122 | p++; | |
2123 | if (*p == 0) | |
2124 | return 0; | |
2125 | get_sigorhash(&sig_alg, &hash_alg, etmp); | |
2126 | get_sigorhash(&sig_alg, &hash_alg, p); | |
fd5e1a8c BK |
2127 | if (sig_alg == NID_undef || hash_alg == NID_undef) |
2128 | return 0; | |
2129 | for (i = 0, s = sigalg_lookup_tbl; i < OSSL_NELEM(sigalg_lookup_tbl); | |
2130 | i++, s++) { | |
2131 | if (s->hash == hash_alg && s->sig == sig_alg) { | |
2132 | sarg->sigalgs[sarg->sigalgcnt++] = s->sigalg; | |
2133 | break; | |
2134 | } | |
2135 | } | |
2136 | if (i == OSSL_NELEM(sigalg_lookup_tbl)) | |
2137 | return 0; | |
8a43a42a | 2138 | } |
0f113f3e | 2139 | |
fd5e1a8c BK |
2140 | /* Reject duplicates */ |
2141 | for (i = 0; i < sarg->sigalgcnt - 1; i++) { | |
c1acef92 | 2142 | if (sarg->sigalgs[i] == sarg->sigalgs[sarg->sigalgcnt - 1]) { |
fd5e1a8c | 2143 | sarg->sigalgcnt--; |
0f113f3e | 2144 | return 0; |
fd5e1a8c | 2145 | } |
0f113f3e | 2146 | } |
0f113f3e MC |
2147 | return 1; |
2148 | } | |
2149 | ||
2150 | /* | |
9d22666e | 2151 | * Set supported signature algorithms based on a colon separated list of the |
0f113f3e MC |
2152 | * form sig+hash e.g. RSA+SHA512:DSA+SHA512 |
2153 | */ | |
3dbc46df | 2154 | int tls1_set_sigalgs_list(CERT *c, const char *str, int client) |
0f113f3e MC |
2155 | { |
2156 | sig_cb_st sig; | |
2157 | sig.sigalgcnt = 0; | |
2158 | if (!CONF_parse_list(str, ':', 1, sig_cb, &sig)) | |
2159 | return 0; | |
2160 | if (c == NULL) | |
2161 | return 1; | |
fd5e1a8c BK |
2162 | return tls1_set_raw_sigalgs(c, sig.sigalgs, sig.sigalgcnt, client); |
2163 | } | |
2164 | ||
2165 | int tls1_set_raw_sigalgs(CERT *c, const uint16_t *psigs, size_t salglen, | |
2166 | int client) | |
2167 | { | |
2168 | uint16_t *sigalgs; | |
2169 | ||
cdb10bae RS |
2170 | if ((sigalgs = OPENSSL_malloc(salglen * sizeof(*sigalgs))) == NULL) { |
2171 | SSLerr(SSL_F_TLS1_SET_RAW_SIGALGS, ERR_R_MALLOC_FAILURE); | |
fd5e1a8c | 2172 | return 0; |
cdb10bae | 2173 | } |
fd5e1a8c BK |
2174 | memcpy(sigalgs, psigs, salglen * sizeof(*sigalgs)); |
2175 | ||
2176 | if (client) { | |
2177 | OPENSSL_free(c->client_sigalgs); | |
2178 | c->client_sigalgs = sigalgs; | |
2179 | c->client_sigalgslen = salglen; | |
2180 | } else { | |
2181 | OPENSSL_free(c->conf_sigalgs); | |
2182 | c->conf_sigalgs = sigalgs; | |
2183 | c->conf_sigalgslen = salglen; | |
2184 | } | |
2185 | ||
2186 | return 1; | |
0f113f3e MC |
2187 | } |
2188 | ||
a230b26e | 2189 | int tls1_set_sigalgs(CERT *c, const int *psig_nids, size_t salglen, int client) |
0f113f3e | 2190 | { |
98c792d1 | 2191 | uint16_t *sigalgs, *sptr; |
0f113f3e | 2192 | size_t i; |
63c1df09 | 2193 | |
0f113f3e MC |
2194 | if (salglen & 1) |
2195 | return 0; | |
cdb10bae RS |
2196 | if ((sigalgs = OPENSSL_malloc((salglen / 2) * sizeof(*sigalgs))) == NULL) { |
2197 | SSLerr(SSL_F_TLS1_SET_SIGALGS, ERR_R_MALLOC_FAILURE); | |
0f113f3e | 2198 | return 0; |
cdb10bae | 2199 | } |
0f113f3e | 2200 | for (i = 0, sptr = sigalgs; i < salglen; i += 2) { |
63c1df09 | 2201 | size_t j; |
7a531ee4 | 2202 | const SIGALG_LOOKUP *curr; |
63c1df09 MC |
2203 | int md_id = *psig_nids++; |
2204 | int sig_id = *psig_nids++; | |
2205 | ||
2206 | for (j = 0, curr = sigalg_lookup_tbl; j < OSSL_NELEM(sigalg_lookup_tbl); | |
2207 | j++, curr++) { | |
fe3066ee | 2208 | if (curr->hash == md_id && curr->sig == sig_id) { |
63c1df09 MC |
2209 | *sptr++ = curr->sigalg; |
2210 | break; | |
2211 | } | |
2212 | } | |
0f113f3e | 2213 | |
63c1df09 | 2214 | if (j == OSSL_NELEM(sigalg_lookup_tbl)) |
0f113f3e | 2215 | goto err; |
0f113f3e MC |
2216 | } |
2217 | ||
2218 | if (client) { | |
b548a1f1 | 2219 | OPENSSL_free(c->client_sigalgs); |
0f113f3e | 2220 | c->client_sigalgs = sigalgs; |
7a531ee4 | 2221 | c->client_sigalgslen = salglen / 2; |
0f113f3e | 2222 | } else { |
b548a1f1 | 2223 | OPENSSL_free(c->conf_sigalgs); |
0f113f3e | 2224 | c->conf_sigalgs = sigalgs; |
7a531ee4 | 2225 | c->conf_sigalgslen = salglen / 2; |
0f113f3e MC |
2226 | } |
2227 | ||
2228 | return 1; | |
2229 | ||
2230 | err: | |
2231 | OPENSSL_free(sigalgs); | |
2232 | return 0; | |
2233 | } | |
4453cd8c | 2234 | |
29948ac8 | 2235 | static int tls1_check_sig_alg(SSL *s, X509 *x, int default_nid) |
0f113f3e | 2236 | { |
5235ef44 | 2237 | int sig_nid, use_pc_sigalgs = 0; |
0f113f3e | 2238 | size_t i; |
5235ef44 MC |
2239 | const SIGALG_LOOKUP *sigalg; |
2240 | size_t sigalgslen; | |
0f113f3e MC |
2241 | if (default_nid == -1) |
2242 | return 1; | |
2243 | sig_nid = X509_get_signature_nid(x); | |
2244 | if (default_nid) | |
2245 | return sig_nid == default_nid ? 1 : 0; | |
5235ef44 MC |
2246 | |
2247 | if (SSL_IS_TLS13(s) && s->s3.tmp.peer_cert_sigalgs != NULL) { | |
2248 | /* | |
2249 | * If we're in TLSv1.3 then we only get here if we're checking the | |
2250 | * chain. If the peer has specified peer_cert_sigalgs then we use them | |
2251 | * otherwise we default to normal sigalgs. | |
2252 | */ | |
2253 | sigalgslen = s->s3.tmp.peer_cert_sigalgslen; | |
2254 | use_pc_sigalgs = 1; | |
2255 | } else { | |
2256 | sigalgslen = s->shared_sigalgslen; | |
2257 | } | |
2258 | for (i = 0; i < sigalgslen; i++) { | |
2259 | sigalg = use_pc_sigalgs | |
2260 | ? tls1_lookup_sigalg(s->s3.tmp.peer_cert_sigalgs[i]) | |
2261 | : s->shared_sigalgs[i]; | |
2262 | if (sig_nid == sigalg->sigandhash) | |
0f113f3e | 2263 | return 1; |
5235ef44 | 2264 | } |
0f113f3e MC |
2265 | return 0; |
2266 | } | |
2267 | ||
6dbb6219 DSH |
2268 | /* Check to see if a certificate issuer name matches list of CA names */ |
2269 | static int ssl_check_ca_name(STACK_OF(X509_NAME) *names, X509 *x) | |
0f113f3e | 2270 | { |
8cc86b81 | 2271 | const X509_NAME *nm; |
0f113f3e MC |
2272 | int i; |
2273 | nm = X509_get_issuer_name(x); | |
2274 | for (i = 0; i < sk_X509_NAME_num(names); i++) { | |
2275 | if (!X509_NAME_cmp(nm, sk_X509_NAME_value(names, i))) | |
2276 | return 1; | |
2277 | } | |
2278 | return 0; | |
2279 | } | |
2280 | ||
2281 | /* | |
2282 | * Check certificate chain is consistent with TLS extensions and is usable by | |
2283 | * server. This servers two purposes: it allows users to check chains before | |
2284 | * passing them to the server and it allows the server to check chains before | |
2285 | * attempting to use them. | |
d61ff83b | 2286 | */ |
6dbb6219 | 2287 | |
69687aa8 | 2288 | /* Flags which need to be set for a certificate when strict mode not set */ |
6dbb6219 | 2289 | |
e481f9b9 | 2290 | #define CERT_PKEY_VALID_FLAGS \ |
0f113f3e | 2291 | (CERT_PKEY_EE_SIGNATURE|CERT_PKEY_EE_PARAM) |
6dbb6219 | 2292 | /* Strict mode flags */ |
e481f9b9 | 2293 | #define CERT_PKEY_STRICT_FLAGS \ |
0f113f3e MC |
2294 | (CERT_PKEY_VALID_FLAGS|CERT_PKEY_CA_SIGNATURE|CERT_PKEY_CA_PARAM \ |
2295 | | CERT_PKEY_ISSUER_NAME|CERT_PKEY_CERT_TYPE) | |
6dbb6219 | 2296 | |
d61ff83b | 2297 | int tls1_check_chain(SSL *s, X509 *x, EVP_PKEY *pk, STACK_OF(X509) *chain, |
0f113f3e MC |
2298 | int idx) |
2299 | { | |
2300 | int i; | |
2301 | int rv = 0; | |
2302 | int check_flags = 0, strict_mode; | |
2303 | CERT_PKEY *cpk = NULL; | |
2304 | CERT *c = s->cert; | |
f7d53487 | 2305 | uint32_t *pvalid; |
0f113f3e MC |
2306 | unsigned int suiteb_flags = tls1_suiteb(s); |
2307 | /* idx == -1 means checking server chains */ | |
2308 | if (idx != -1) { | |
2309 | /* idx == -2 means checking client certificate chains */ | |
2310 | if (idx == -2) { | |
2311 | cpk = c->key; | |
348240c6 | 2312 | idx = (int)(cpk - c->pkeys); |
0f113f3e MC |
2313 | } else |
2314 | cpk = c->pkeys + idx; | |
555cbb32 | 2315 | pvalid = s->s3.tmp.valid_flags + idx; |
0f113f3e MC |
2316 | x = cpk->x509; |
2317 | pk = cpk->privatekey; | |
2318 | chain = cpk->chain; | |
2319 | strict_mode = c->cert_flags & SSL_CERT_FLAGS_CHECK_TLS_STRICT; | |
2320 | /* If no cert or key, forget it */ | |
2321 | if (!x || !pk) | |
2322 | goto end; | |
0f113f3e | 2323 | } else { |
52fd27f9 DSH |
2324 | size_t certidx; |
2325 | ||
0f113f3e | 2326 | if (!x || !pk) |
d813f9eb | 2327 | return 0; |
52fd27f9 DSH |
2328 | |
2329 | if (ssl_cert_lookup_by_pkey(pk, &certidx) == NULL) | |
d813f9eb | 2330 | return 0; |
52fd27f9 | 2331 | idx = certidx; |
555cbb32 | 2332 | pvalid = s->s3.tmp.valid_flags + idx; |
6383d316 | 2333 | |
0f113f3e MC |
2334 | if (c->cert_flags & SSL_CERT_FLAGS_CHECK_TLS_STRICT) |
2335 | check_flags = CERT_PKEY_STRICT_FLAGS; | |
2336 | else | |
2337 | check_flags = CERT_PKEY_VALID_FLAGS; | |
2338 | strict_mode = 1; | |
2339 | } | |
2340 | ||
2341 | if (suiteb_flags) { | |
2342 | int ok; | |
2343 | if (check_flags) | |
2344 | check_flags |= CERT_PKEY_SUITEB; | |
2345 | ok = X509_chain_check_suiteb(NULL, x, chain, suiteb_flags); | |
2346 | if (ok == X509_V_OK) | |
2347 | rv |= CERT_PKEY_SUITEB; | |
2348 | else if (!check_flags) | |
2349 | goto end; | |
2350 | } | |
2351 | ||
2352 | /* | |
2353 | * Check all signature algorithms are consistent with signature | |
2354 | * algorithms extension if TLS 1.2 or later and strict mode. | |
2355 | */ | |
2356 | if (TLS1_get_version(s) >= TLS1_2_VERSION && strict_mode) { | |
2357 | int default_nid; | |
536199ec | 2358 | int rsign = 0; |
555cbb32 TS |
2359 | if (s->s3.tmp.peer_cert_sigalgs != NULL |
2360 | || s->s3.tmp.peer_sigalgs != NULL) { | |
0f113f3e MC |
2361 | default_nid = 0; |
2362 | /* If no sigalgs extension use defaults from RFC5246 */ | |
c589c34e | 2363 | } else { |
0f113f3e | 2364 | switch (idx) { |
d0ff28f8 | 2365 | case SSL_PKEY_RSA: |
536199ec | 2366 | rsign = EVP_PKEY_RSA; |
0f113f3e MC |
2367 | default_nid = NID_sha1WithRSAEncryption; |
2368 | break; | |
2369 | ||
2370 | case SSL_PKEY_DSA_SIGN: | |
536199ec | 2371 | rsign = EVP_PKEY_DSA; |
0f113f3e MC |
2372 | default_nid = NID_dsaWithSHA1; |
2373 | break; | |
2374 | ||
2375 | case SSL_PKEY_ECC: | |
536199ec | 2376 | rsign = EVP_PKEY_EC; |
0f113f3e MC |
2377 | default_nid = NID_ecdsa_with_SHA1; |
2378 | break; | |
2379 | ||
e44380a9 | 2380 | case SSL_PKEY_GOST01: |
536199ec | 2381 | rsign = NID_id_GostR3410_2001; |
e44380a9 DB |
2382 | default_nid = NID_id_GostR3411_94_with_GostR3410_2001; |
2383 | break; | |
2384 | ||
2385 | case SSL_PKEY_GOST12_256: | |
536199ec | 2386 | rsign = NID_id_GostR3410_2012_256; |
e44380a9 DB |
2387 | default_nid = NID_id_tc26_signwithdigest_gost3410_2012_256; |
2388 | break; | |
2389 | ||
2390 | case SSL_PKEY_GOST12_512: | |
536199ec | 2391 | rsign = NID_id_GostR3410_2012_512; |
e44380a9 DB |
2392 | default_nid = NID_id_tc26_signwithdigest_gost3410_2012_512; |
2393 | break; | |
2394 | ||
0f113f3e MC |
2395 | default: |
2396 | default_nid = -1; | |
2397 | break; | |
2398 | } | |
2399 | } | |
2400 | /* | |
2401 | * If peer sent no signature algorithms extension and we have set | |
2402 | * preferred signature algorithms check we support sha1. | |
2403 | */ | |
2404 | if (default_nid > 0 && c->conf_sigalgs) { | |
2405 | size_t j; | |
98c792d1 | 2406 | const uint16_t *p = c->conf_sigalgs; |
703bcee0 | 2407 | for (j = 0; j < c->conf_sigalgslen; j++, p++) { |
44b6318f DSH |
2408 | const SIGALG_LOOKUP *lu = tls1_lookup_sigalg(*p); |
2409 | ||
2410 | if (lu != NULL && lu->hash == NID_sha1 && lu->sig == rsign) | |
0f113f3e MC |
2411 | break; |
2412 | } | |
2413 | if (j == c->conf_sigalgslen) { | |
2414 | if (check_flags) | |
2415 | goto skip_sigs; | |
2416 | else | |
2417 | goto end; | |
2418 | } | |
2419 | } | |
2420 | /* Check signature algorithm of each cert in chain */ | |
5235ef44 MC |
2421 | if (SSL_IS_TLS13(s)) { |
2422 | /* | |
2423 | * We only get here if the application has called SSL_check_chain(), | |
2424 | * so check_flags is always set. | |
2425 | */ | |
2426 | if (find_sig_alg(s, x, pk) != NULL) | |
2427 | rv |= CERT_PKEY_EE_SIGNATURE; | |
2428 | } else if (!tls1_check_sig_alg(s, x, default_nid)) { | |
0f113f3e MC |
2429 | if (!check_flags) |
2430 | goto end; | |
2431 | } else | |
2432 | rv |= CERT_PKEY_EE_SIGNATURE; | |
2433 | rv |= CERT_PKEY_CA_SIGNATURE; | |
2434 | for (i = 0; i < sk_X509_num(chain); i++) { | |
29948ac8 | 2435 | if (!tls1_check_sig_alg(s, sk_X509_value(chain, i), default_nid)) { |
0f113f3e MC |
2436 | if (check_flags) { |
2437 | rv &= ~CERT_PKEY_CA_SIGNATURE; | |
2438 | break; | |
2439 | } else | |
2440 | goto end; | |
2441 | } | |
2442 | } | |
2443 | } | |
2444 | /* Else not TLS 1.2, so mark EE and CA signing algorithms OK */ | |
2445 | else if (check_flags) | |
2446 | rv |= CERT_PKEY_EE_SIGNATURE | CERT_PKEY_CA_SIGNATURE; | |
2447 | skip_sigs: | |
2448 | /* Check cert parameters are consistent */ | |
9195ddcd | 2449 | if (tls1_check_cert_param(s, x, 1)) |
0f113f3e MC |
2450 | rv |= CERT_PKEY_EE_PARAM; |
2451 | else if (!check_flags) | |
2452 | goto end; | |
2453 | if (!s->server) | |
2454 | rv |= CERT_PKEY_CA_PARAM; | |
2455 | /* In strict mode check rest of chain too */ | |
2456 | else if (strict_mode) { | |
2457 | rv |= CERT_PKEY_CA_PARAM; | |
2458 | for (i = 0; i < sk_X509_num(chain); i++) { | |
2459 | X509 *ca = sk_X509_value(chain, i); | |
2460 | if (!tls1_check_cert_param(s, ca, 0)) { | |
2461 | if (check_flags) { | |
2462 | rv &= ~CERT_PKEY_CA_PARAM; | |
2463 | break; | |
2464 | } else | |
2465 | goto end; | |
2466 | } | |
2467 | } | |
2468 | } | |
2469 | if (!s->server && strict_mode) { | |
2470 | STACK_OF(X509_NAME) *ca_dn; | |
2471 | int check_type = 0; | |
c2041da8 RL |
2472 | |
2473 | if (EVP_PKEY_is_a(pk, "RSA")) | |
0f113f3e | 2474 | check_type = TLS_CT_RSA_SIGN; |
c2041da8 | 2475 | else if (EVP_PKEY_is_a(pk, "DSA")) |
0f113f3e | 2476 | check_type = TLS_CT_DSS_SIGN; |
c2041da8 | 2477 | else if (EVP_PKEY_is_a(pk, "EC")) |
0f113f3e | 2478 | check_type = TLS_CT_ECDSA_SIGN; |
c2041da8 | 2479 | |
0f113f3e | 2480 | if (check_type) { |
555cbb32 | 2481 | const uint8_t *ctypes = s->s3.tmp.ctype; |
75c13e78 DSH |
2482 | size_t j; |
2483 | ||
555cbb32 | 2484 | for (j = 0; j < s->s3.tmp.ctype_len; j++, ctypes++) { |
75c13e78 | 2485 | if (*ctypes == check_type) { |
0f113f3e MC |
2486 | rv |= CERT_PKEY_CERT_TYPE; |
2487 | break; | |
2488 | } | |
2489 | } | |
2490 | if (!(rv & CERT_PKEY_CERT_TYPE) && !check_flags) | |
2491 | goto end; | |
75c13e78 | 2492 | } else { |
0f113f3e | 2493 | rv |= CERT_PKEY_CERT_TYPE; |
75c13e78 | 2494 | } |
0f113f3e | 2495 | |
555cbb32 | 2496 | ca_dn = s->s3.tmp.peer_ca_names; |
0f113f3e MC |
2497 | |
2498 | if (!sk_X509_NAME_num(ca_dn)) | |
2499 | rv |= CERT_PKEY_ISSUER_NAME; | |
2500 | ||
2501 | if (!(rv & CERT_PKEY_ISSUER_NAME)) { | |
2502 | if (ssl_check_ca_name(ca_dn, x)) | |
2503 | rv |= CERT_PKEY_ISSUER_NAME; | |
2504 | } | |
2505 | if (!(rv & CERT_PKEY_ISSUER_NAME)) { | |
2506 | for (i = 0; i < sk_X509_num(chain); i++) { | |
2507 | X509 *xtmp = sk_X509_value(chain, i); | |
2508 | if (ssl_check_ca_name(ca_dn, xtmp)) { | |
2509 | rv |= CERT_PKEY_ISSUER_NAME; | |
2510 | break; | |
2511 | } | |
2512 | } | |
2513 | } | |
2514 | if (!check_flags && !(rv & CERT_PKEY_ISSUER_NAME)) | |
2515 | goto end; | |
2516 | } else | |
2517 | rv |= CERT_PKEY_ISSUER_NAME | CERT_PKEY_CERT_TYPE; | |
2518 | ||
2519 | if (!check_flags || (rv & check_flags) == check_flags) | |
2520 | rv |= CERT_PKEY_VALID; | |
2521 | ||
2522 | end: | |
2523 | ||
a8bb912d DSH |
2524 | if (TLS1_get_version(s) >= TLS1_2_VERSION) |
2525 | rv |= *pvalid & (CERT_PKEY_EXPLICIT_SIGN | CERT_PKEY_SIGN); | |
2526 | else | |
0f113f3e MC |
2527 | rv |= CERT_PKEY_SIGN | CERT_PKEY_EXPLICIT_SIGN; |
2528 | ||
2529 | /* | |
2530 | * When checking a CERT_PKEY structure all flags are irrelevant if the | |
2531 | * chain is invalid. | |
2532 | */ | |
2533 | if (!check_flags) { | |
a8bb912d | 2534 | if (rv & CERT_PKEY_VALID) { |
6383d316 | 2535 | *pvalid = rv; |
a8bb912d DSH |
2536 | } else { |
2537 | /* Preserve sign and explicit sign flag, clear rest */ | |
2538 | *pvalid &= CERT_PKEY_EXPLICIT_SIGN | CERT_PKEY_SIGN; | |
0f113f3e MC |
2539 | return 0; |
2540 | } | |
2541 | } | |
2542 | return rv; | |
2543 | } | |
d61ff83b DSH |
2544 | |
2545 | /* Set validity of certificates in an SSL structure */ | |
2546 | void tls1_set_cert_validity(SSL *s) | |
0f113f3e | 2547 | { |
d0ff28f8 | 2548 | tls1_check_chain(s, NULL, NULL, NULL, SSL_PKEY_RSA); |
045d078a | 2549 | tls1_check_chain(s, NULL, NULL, NULL, SSL_PKEY_RSA_PSS_SIGN); |
17dd65e6 | 2550 | tls1_check_chain(s, NULL, NULL, NULL, SSL_PKEY_DSA_SIGN); |
17dd65e6 | 2551 | tls1_check_chain(s, NULL, NULL, NULL, SSL_PKEY_ECC); |
e44380a9 DB |
2552 | tls1_check_chain(s, NULL, NULL, NULL, SSL_PKEY_GOST01); |
2553 | tls1_check_chain(s, NULL, NULL, NULL, SSL_PKEY_GOST12_256); | |
2554 | tls1_check_chain(s, NULL, NULL, NULL, SSL_PKEY_GOST12_512); | |
3d234c9e | 2555 | tls1_check_chain(s, NULL, NULL, NULL, SSL_PKEY_ED25519); |
0e1d6ecf | 2556 | tls1_check_chain(s, NULL, NULL, NULL, SSL_PKEY_ED448); |
0f113f3e MC |
2557 | } |
2558 | ||
69687aa8 | 2559 | /* User level utility function to check a chain is suitable */ |
18d71588 | 2560 | int SSL_check_chain(SSL *s, X509 *x, EVP_PKEY *pk, STACK_OF(X509) *chain) |
0f113f3e MC |
2561 | { |
2562 | return tls1_check_chain(s, x, pk, chain, -1); | |
2563 | } | |
d61ff83b | 2564 | |
09599b52 DSH |
2565 | #ifndef OPENSSL_NO_DH |
2566 | DH *ssl_get_auto_dh(SSL *s) | |
0f113f3e MC |
2567 | { |
2568 | int dh_secbits = 80; | |
2569 | if (s->cert->dh_tmp_auto == 2) | |
2570 | return DH_get_1024_160(); | |
555cbb32 TS |
2571 | if (s->s3.tmp.new_cipher->algorithm_auth & (SSL_aNULL | SSL_aPSK)) { |
2572 | if (s->s3.tmp.new_cipher->strength_bits == 256) | |
0f113f3e MC |
2573 | dh_secbits = 128; |
2574 | else | |
2575 | dh_secbits = 80; | |
2576 | } else { | |
555cbb32 | 2577 | if (s->s3.tmp.cert == NULL) |
f365a3e2 | 2578 | return NULL; |
555cbb32 | 2579 | dh_secbits = EVP_PKEY_security_bits(s->s3.tmp.cert->privatekey); |
0f113f3e MC |
2580 | } |
2581 | ||
2582 | if (dh_secbits >= 128) { | |
2583 | DH *dhp = DH_new(); | |
0aeddcfa | 2584 | BIGNUM *p, *g; |
a71edf3b | 2585 | if (dhp == NULL) |
0f113f3e | 2586 | return NULL; |
0aeddcfa | 2587 | g = BN_new(); |
8eab767a P |
2588 | if (g == NULL || !BN_set_word(g, 2)) { |
2589 | DH_free(dhp); | |
2590 | BN_free(g); | |
2591 | return NULL; | |
2592 | } | |
0f113f3e | 2593 | if (dh_secbits >= 192) |
9021a5df | 2594 | p = BN_get_rfc3526_prime_8192(NULL); |
0f113f3e | 2595 | else |
9021a5df | 2596 | p = BN_get_rfc3526_prime_3072(NULL); |
8eab767a | 2597 | if (p == NULL || !DH_set0_pqg(dhp, p, NULL, g)) { |
0f113f3e | 2598 | DH_free(dhp); |
0aeddcfa MC |
2599 | BN_free(p); |
2600 | BN_free(g); | |
0f113f3e MC |
2601 | return NULL; |
2602 | } | |
2603 | return dhp; | |
2604 | } | |
2605 | if (dh_secbits >= 112) | |
2606 | return DH_get_2048_224(); | |
2607 | return DH_get_1024_160(); | |
2608 | } | |
09599b52 | 2609 | #endif |
b362ccab DSH |
2610 | |
2611 | static int ssl_security_cert_key(SSL *s, SSL_CTX *ctx, X509 *x, int op) | |
0f113f3e | 2612 | { |
72245f34 | 2613 | int secbits = -1; |
8382fd3a | 2614 | EVP_PKEY *pkey = X509_get0_pubkey(x); |
0f113f3e | 2615 | if (pkey) { |
72245f34 DSH |
2616 | /* |
2617 | * If no parameters this will return -1 and fail using the default | |
2618 | * security callback for any non-zero security level. This will | |
2619 | * reject keys which omit parameters but this only affects DSA and | |
2620 | * omission of parameters is never (?) done in practice. | |
2621 | */ | |
0f113f3e | 2622 | secbits = EVP_PKEY_security_bits(pkey); |
72245f34 | 2623 | } |
0f113f3e MC |
2624 | if (s) |
2625 | return ssl_security(s, op, secbits, 0, x); | |
2626 | else | |
2627 | return ssl_ctx_security(ctx, op, secbits, 0, x); | |
2628 | } | |
b362ccab DSH |
2629 | |
2630 | static int ssl_security_cert_sig(SSL *s, SSL_CTX *ctx, X509 *x, int op) | |
0f113f3e MC |
2631 | { |
2632 | /* Lookup signature algorithm digest */ | |
65e89736 | 2633 | int secbits, nid, pknid; |
221c7b55 DSH |
2634 | /* Don't check signature if self signed */ |
2635 | if ((X509_get_extension_flags(x) & EXFLAG_SS) != 0) | |
2636 | return 1; | |
65e89736 DSH |
2637 | if (!X509_get_signature_info(x, &nid, &pknid, &secbits, NULL)) |
2638 | secbits = -1; | |
2639 | /* If digest NID not defined use signature NID */ | |
2640 | if (nid == NID_undef) | |
2641 | nid = pknid; | |
0f113f3e | 2642 | if (s) |
65e89736 | 2643 | return ssl_security(s, op, secbits, nid, x); |
0f113f3e | 2644 | else |
65e89736 | 2645 | return ssl_ctx_security(ctx, op, secbits, nid, x); |
0f113f3e | 2646 | } |
b362ccab DSH |
2647 | |
2648 | int ssl_security_cert(SSL *s, SSL_CTX *ctx, X509 *x, int vfy, int is_ee) | |
0f113f3e MC |
2649 | { |
2650 | if (vfy) | |
2651 | vfy = SSL_SECOP_PEER; | |
2652 | if (is_ee) { | |
2653 | if (!ssl_security_cert_key(s, ctx, x, SSL_SECOP_EE_KEY | vfy)) | |
2654 | return SSL_R_EE_KEY_TOO_SMALL; | |
2655 | } else { | |
2656 | if (!ssl_security_cert_key(s, ctx, x, SSL_SECOP_CA_KEY | vfy)) | |
2657 | return SSL_R_CA_KEY_TOO_SMALL; | |
2658 | } | |
2659 | if (!ssl_security_cert_sig(s, ctx, x, SSL_SECOP_CA_MD | vfy)) | |
2660 | return SSL_R_CA_MD_TOO_WEAK; | |
2661 | return 1; | |
2662 | } | |
2663 | ||
2664 | /* | |
69687aa8 F |
2665 | * Check security of a chain, if |sk| includes the end entity certificate then |
2666 | * |x| is NULL. If |vfy| is 1 then we are verifying a peer chain and not sending | |
0f113f3e | 2667 | * one to the peer. Return values: 1 if ok otherwise error code to use |
b362ccab DSH |
2668 | */ |
2669 | ||
2670 | int ssl_security_cert_chain(SSL *s, STACK_OF(X509) *sk, X509 *x, int vfy) | |
0f113f3e MC |
2671 | { |
2672 | int rv, start_idx, i; | |
2673 | if (x == NULL) { | |
2674 | x = sk_X509_value(sk, 0); | |
2675 | start_idx = 1; | |
2676 | } else | |
2677 | start_idx = 0; | |
2678 | ||
2679 | rv = ssl_security_cert(s, NULL, x, vfy, 1); | |
2680 | if (rv != 1) | |
2681 | return rv; | |
2682 | ||
2683 | for (i = start_idx; i < sk_X509_num(sk); i++) { | |
2684 | x = sk_X509_value(sk, i); | |
2685 | rv = ssl_security_cert(s, NULL, x, vfy, 0); | |
2686 | if (rv != 1) | |
2687 | return rv; | |
2688 | } | |
2689 | return 1; | |
2690 | } | |
93a77f9e | 2691 | |
7f6b466b DSH |
2692 | /* |
2693 | * For TLS 1.2 servers check if we have a certificate which can be used | |
b46867d7 | 2694 | * with the signature algorithm "lu" and return index of certificate. |
7f6b466b DSH |
2695 | */ |
2696 | ||
b46867d7 | 2697 | static int tls12_get_cert_sigalg_idx(const SSL *s, const SIGALG_LOOKUP *lu) |
7f6b466b | 2698 | { |
b46867d7 DSH |
2699 | int sig_idx = lu->sig_idx; |
2700 | const SSL_CERT_LOOKUP *clu = ssl_cert_lookup_by_idx(sig_idx); | |
7f6b466b DSH |
2701 | |
2702 | /* If not recognised or not supported by cipher mask it is not suitable */ | |
b8fef8ee | 2703 | if (clu == NULL |
555cbb32 | 2704 | || (clu->amask & s->s3.tmp.new_cipher->algorithm_auth) == 0 |
b8fef8ee | 2705 | || (clu->nid == EVP_PKEY_RSA_PSS |
555cbb32 | 2706 | && (s->s3.tmp.new_cipher->algorithm_mkey & SSL_kRSA) != 0)) |
b46867d7 DSH |
2707 | return -1; |
2708 | ||
555cbb32 | 2709 | return s->s3.tmp.valid_flags[sig_idx] & CERT_PKEY_VALID ? sig_idx : -1; |
7f6b466b DSH |
2710 | } |
2711 | ||
c589c34e | 2712 | /* |
5235ef44 MC |
2713 | * Checks the given cert against signature_algorithm_cert restrictions sent by |
2714 | * the peer (if any) as well as whether the hash from the sigalg is usable with | |
2715 | * the key. | |
2716 | * Returns true if the cert is usable and false otherwise. | |
c589c34e | 2717 | */ |
5235ef44 MC |
2718 | static int check_cert_usable(SSL *s, const SIGALG_LOOKUP *sig, X509 *x, |
2719 | EVP_PKEY *pkey) | |
c589c34e BK |
2720 | { |
2721 | const SIGALG_LOOKUP *lu; | |
ecbb2fca | 2722 | int mdnid, pknid, supported; |
c589c34e BK |
2723 | size_t i; |
2724 | ||
b5a27688 DW |
2725 | /* |
2726 | * If the given EVP_PKEY cannot supporting signing with this sigalg, | |
2727 | * the answer is simply 'no'. | |
2728 | */ | |
2729 | ERR_set_mark(); | |
2730 | supported = EVP_PKEY_supports_digest_nid(pkey, sig->hash); | |
2731 | ERR_pop_to_mark(); | |
2732 | if (supported == 0) | |
2733 | return 0; | |
2734 | ||
2735 | /* | |
2736 | * The TLS 1.3 signature_algorithms_cert extension places restrictions | |
2737 | * on the sigalg with which the certificate was signed (by its issuer). | |
2738 | */ | |
555cbb32 | 2739 | if (s->s3.tmp.peer_cert_sigalgs != NULL) { |
b5a27688 DW |
2740 | if (!X509_get_signature_info(x, &mdnid, &pknid, NULL, NULL)) |
2741 | return 0; | |
555cbb32 TS |
2742 | for (i = 0; i < s->s3.tmp.peer_cert_sigalgslen; i++) { |
2743 | lu = tls1_lookup_sigalg(s->s3.tmp.peer_cert_sigalgs[i]); | |
b5a27688 | 2744 | if (lu == NULL) |
c589c34e | 2745 | continue; |
ecbb2fca | 2746 | |
5235ef44 | 2747 | /* |
b5a27688 DW |
2748 | * TODO this does not differentiate between the |
2749 | * rsa_pss_pss_* and rsa_pss_rsae_* schemes since we do not | |
2750 | * have a chain here that lets us look at the key OID in the | |
2751 | * signing certificate. | |
5235ef44 | 2752 | */ |
b5a27688 DW |
2753 | if (mdnid == lu->hash && pknid == lu->sig) |
2754 | return 1; | |
c589c34e BK |
2755 | } |
2756 | return 0; | |
2757 | } | |
b5a27688 | 2758 | |
5235ef44 | 2759 | /* |
b5a27688 DW |
2760 | * Without signat_algorithms_cert, any certificate for which we have |
2761 | * a viable public key is permitted. | |
5235ef44 | 2762 | */ |
ecbb2fca | 2763 | return 1; |
c589c34e BK |
2764 | } |
2765 | ||
5235ef44 MC |
2766 | /* |
2767 | * Returns true if |s| has a usable certificate configured for use | |
2768 | * with signature scheme |sig|. | |
2769 | * "Usable" includes a check for presence as well as applying | |
2770 | * the signature_algorithm_cert restrictions sent by the peer (if any). | |
2771 | * Returns false if no usable certificate is found. | |
2772 | */ | |
2773 | static int has_usable_cert(SSL *s, const SIGALG_LOOKUP *sig, int idx) | |
2774 | { | |
2775 | /* TLS 1.2 callers can override sig->sig_idx, but not TLS 1.3 callers. */ | |
2776 | if (idx == -1) | |
2777 | idx = sig->sig_idx; | |
2778 | if (!ssl_has_cert(s, idx)) | |
2779 | return 0; | |
2780 | ||
2781 | return check_cert_usable(s, sig, s->cert->pkeys[idx].x509, | |
2782 | s->cert->pkeys[idx].privatekey); | |
2783 | } | |
2784 | ||
2785 | /* | |
2786 | * Returns true if the supplied cert |x| and key |pkey| is usable with the | |
2787 | * specified signature scheme |sig|, or false otherwise. | |
2788 | */ | |
2789 | static int is_cert_usable(SSL *s, const SIGALG_LOOKUP *sig, X509 *x, | |
2790 | EVP_PKEY *pkey) | |
2791 | { | |
2792 | size_t idx; | |
2793 | ||
2794 | if (ssl_cert_lookup_by_pkey(pkey, &idx) == NULL) | |
2795 | return 0; | |
2796 | ||
2797 | /* Check the key is consistent with the sig alg */ | |
2798 | if ((int)idx != sig->sig_idx) | |
2799 | return 0; | |
2800 | ||
2801 | return check_cert_usable(s, sig, x, pkey); | |
2802 | } | |
2803 | ||
2804 | /* | |
2805 | * Find a signature scheme that works with the supplied certificate |x| and key | |
2806 | * |pkey|. |x| and |pkey| may be NULL in which case we additionally look at our | |
2807 | * available certs/keys to find one that works. | |
2808 | */ | |
2809 | static const SIGALG_LOOKUP *find_sig_alg(SSL *s, X509 *x, EVP_PKEY *pkey) | |
2810 | { | |
2811 | const SIGALG_LOOKUP *lu = NULL; | |
2812 | size_t i; | |
2813 | #ifndef OPENSSL_NO_EC | |
2814 | int curve = -1; | |
2815 | #endif | |
2816 | EVP_PKEY *tmppkey; | |
2817 | ||
2818 | /* Look for a shared sigalgs matching possible certificates */ | |
2819 | for (i = 0; i < s->shared_sigalgslen; i++) { | |
2820 | lu = s->shared_sigalgs[i]; | |
2821 | ||
2822 | /* Skip SHA1, SHA224, DSA and RSA if not PSS */ | |
2823 | if (lu->hash == NID_sha1 | |
2824 | || lu->hash == NID_sha224 | |
2825 | || lu->sig == EVP_PKEY_DSA | |
2826 | || lu->sig == EVP_PKEY_RSA) | |
2827 | continue; | |
2828 | /* Check that we have a cert, and signature_algorithms_cert */ | |
c8f6c28a | 2829 | if (!tls1_lookup_md(s->ctx, lu, NULL)) |
5235ef44 MC |
2830 | continue; |
2831 | if ((pkey == NULL && !has_usable_cert(s, lu, -1)) | |
2832 | || (pkey != NULL && !is_cert_usable(s, lu, x, pkey))) | |
2833 | continue; | |
2834 | ||
2835 | tmppkey = (pkey != NULL) ? pkey | |
2836 | : s->cert->pkeys[lu->sig_idx].privatekey; | |
2837 | ||
2838 | if (lu->sig == EVP_PKEY_EC) { | |
2839 | #ifndef OPENSSL_NO_EC | |
c2041da8 RL |
2840 | if (curve == -1) |
2841 | curve = evp_pkey_get_EC_KEY_curve_nid(tmppkey); | |
5235ef44 MC |
2842 | if (lu->curve != NID_undef && curve != lu->curve) |
2843 | continue; | |
2844 | #else | |
2845 | continue; | |
2846 | #endif | |
2847 | } else if (lu->sig == EVP_PKEY_RSA_PSS) { | |
2848 | /* validate that key is large enough for the signature algorithm */ | |
c5f87134 | 2849 | if (!rsa_pss_check_min_key_size(s->ctx, tmppkey, lu)) |
5235ef44 MC |
2850 | continue; |
2851 | } | |
2852 | break; | |
2853 | } | |
2854 | ||
2855 | if (i == s->shared_sigalgslen) | |
2856 | return NULL; | |
2857 | ||
2858 | return lu; | |
2859 | } | |
2860 | ||
93a77f9e DSH |
2861 | /* |
2862 | * Choose an appropriate signature algorithm based on available certificates | |
717a265a DSH |
2863 | * Sets chosen certificate and signature algorithm. |
2864 | * | |
f63a17d6 MC |
2865 | * For servers if we fail to find a required certificate it is a fatal error, |
2866 | * an appropriate error code is set and a TLS alert is sent. | |
717a265a | 2867 | * |
f63a17d6 | 2868 | * For clients fatalerrs is set to 0. If a certificate is not suitable it is not |
717a265a DSH |
2869 | * a fatal error: we will either try another certificate or not present one |
2870 | * to the server. In this case no error is set. | |
93a77f9e | 2871 | */ |
f63a17d6 | 2872 | int tls_choose_sigalg(SSL *s, int fatalerrs) |
93a77f9e | 2873 | { |
0972bc5c | 2874 | const SIGALG_LOOKUP *lu = NULL; |
b46867d7 | 2875 | int sig_idx = -1; |
0972bc5c | 2876 | |
555cbb32 TS |
2877 | s->s3.tmp.cert = NULL; |
2878 | s->s3.tmp.sigalg = NULL; | |
717a265a | 2879 | |
93a77f9e | 2880 | if (SSL_IS_TLS13(s)) { |
5235ef44 MC |
2881 | lu = find_sig_alg(s, NULL, NULL); |
2882 | if (lu == NULL) { | |
f63a17d6 | 2883 | if (!fatalerrs) |
717a265a | 2884 | return 1; |
f63a17d6 MC |
2885 | SSLfatal(s, SSL_AD_HANDSHAKE_FAILURE, SSL_F_TLS_CHOOSE_SIGALG, |
2886 | SSL_R_NO_SUITABLE_SIGNATURE_ALGORITHM); | |
0972bc5c DSH |
2887 | return 0; |
2888 | } | |
2889 | } else { | |
7f6b466b | 2890 | /* If ciphersuite doesn't require a cert nothing to do */ |
555cbb32 | 2891 | if (!(s->s3.tmp.new_cipher->algorithm_auth & SSL_aCERT)) |
7f6b466b DSH |
2892 | return 1; |
2893 | if (!s->server && !ssl_has_cert(s, s->cert->key - s->cert->pkeys)) | |
717a265a | 2894 | return 1; |
0972bc5c DSH |
2895 | |
2896 | if (SSL_USE_SIGALGS(s)) { | |
c589c34e | 2897 | size_t i; |
555cbb32 | 2898 | if (s->s3.tmp.peer_sigalgs != NULL) { |
599b586d | 2899 | #ifndef OPENSSL_NO_EC |
c2041da8 | 2900 | int curve = -1; |
599b586d DSH |
2901 | |
2902 | /* For Suite B need to match signature algorithm to curve */ | |
c2041da8 RL |
2903 | if (tls1_suiteb(s)) |
2904 | curve = | |
2905 | evp_pkey_get_EC_KEY_curve_nid(s->cert->pkeys[SSL_PKEY_ECC] | |
2906 | .privatekey); | |
599b586d | 2907 | #endif |
0972bc5c DSH |
2908 | |
2909 | /* | |
2910 | * Find highest preference signature algorithm matching | |
2911 | * cert type | |
2912 | */ | |
29948ac8 BK |
2913 | for (i = 0; i < s->shared_sigalgslen; i++) { |
2914 | lu = s->shared_sigalgs[i]; | |
7f6b466b DSH |
2915 | |
2916 | if (s->server) { | |
b46867d7 | 2917 | if ((sig_idx = tls12_get_cert_sigalg_idx(s, lu)) == -1) |
7f6b466b | 2918 | continue; |
b46867d7 DSH |
2919 | } else { |
2920 | int cc_idx = s->cert->key - s->cert->pkeys; | |
2921 | ||
2922 | sig_idx = lu->sig_idx; | |
c589c34e BK |
2923 | if (cc_idx != sig_idx) |
2924 | continue; | |
b2021556 | 2925 | } |
c589c34e BK |
2926 | /* Check that we have a cert, and sig_algs_cert */ |
2927 | if (!has_usable_cert(s, lu, sig_idx)) | |
2928 | continue; | |
0fe3db25 NR |
2929 | if (lu->sig == EVP_PKEY_RSA_PSS) { |
2930 | /* validate that key is large enough for the signature algorithm */ | |
bcec0b94 | 2931 | EVP_PKEY *pkey = s->cert->pkeys[sig_idx].privatekey; |
0fe3db25 | 2932 | |
c5f87134 | 2933 | if (!rsa_pss_check_min_key_size(s->ctx, pkey, lu)) |
0fe3db25 NR |
2934 | continue; |
2935 | } | |
7f6b466b DSH |
2936 | #ifndef OPENSSL_NO_EC |
2937 | if (curve == -1 || lu->curve == curve) | |
599b586d | 2938 | #endif |
0972bc5c DSH |
2939 | break; |
2940 | } | |
db30f432 DB |
2941 | #ifndef OPENSSL_NO_GOST |
2942 | /* | |
2943 | * Some Windows-based implementations do not send GOST algorithms indication | |
2944 | * in supported_algorithms extension, so when we have GOST-based ciphersuite, | |
2945 | * we have to assume GOST support. | |
2946 | */ | |
2947 | if (i == s->shared_sigalgslen && s->s3.tmp.new_cipher->algorithm_auth & (SSL_aGOST01 | SSL_aGOST12)) { | |
2948 | if ((lu = tls1_get_legacy_sigalg(s, -1)) == NULL) { | |
2949 | if (!fatalerrs) | |
2950 | return 1; | |
2951 | SSLfatal(s, SSL_AD_HANDSHAKE_FAILURE, | |
2952 | SSL_F_TLS_CHOOSE_SIGALG, | |
2953 | SSL_R_NO_SUITABLE_SIGNATURE_ALGORITHM); | |
2954 | return 0; | |
2955 | } else { | |
2956 | i = 0; | |
2957 | sig_idx = lu->sig_idx; | |
2958 | } | |
2959 | } | |
2960 | #endif | |
29948ac8 | 2961 | if (i == s->shared_sigalgslen) { |
f63a17d6 | 2962 | if (!fatalerrs) |
717a265a | 2963 | return 1; |
b8fef8ee MC |
2964 | SSLfatal(s, SSL_AD_HANDSHAKE_FAILURE, |
2965 | SSL_F_TLS_CHOOSE_SIGALG, | |
2966 | SSL_R_NO_SUITABLE_SIGNATURE_ALGORITHM); | |
0972bc5c DSH |
2967 | return 0; |
2968 | } | |
2969 | } else { | |
2970 | /* | |
2971 | * If we have no sigalg use defaults | |
2972 | */ | |
2973 | const uint16_t *sent_sigs; | |
c589c34e | 2974 | size_t sent_sigslen; |
0972bc5c | 2975 | |
7f6b466b | 2976 | if ((lu = tls1_get_legacy_sigalg(s, -1)) == NULL) { |
f63a17d6 | 2977 | if (!fatalerrs) |
717a265a | 2978 | return 1; |
f63a17d6 | 2979 | SSLfatal(s, SSL_AD_INTERNAL_ERROR, SSL_F_TLS_CHOOSE_SIGALG, |
a70535f8 | 2980 | SSL_R_NO_SUITABLE_SIGNATURE_ALGORITHM); |
0972bc5c DSH |
2981 | return 0; |
2982 | } | |
2983 | ||
2984 | /* Check signature matches a type we sent */ | |
2985 | sent_sigslen = tls12_get_psigalgs(s, 1, &sent_sigs); | |
2986 | for (i = 0; i < sent_sigslen; i++, sent_sigs++) { | |
c589c34e BK |
2987 | if (lu->sigalg == *sent_sigs |
2988 | && has_usable_cert(s, lu, lu->sig_idx)) | |
0972bc5c DSH |
2989 | break; |
2990 | } | |
2991 | if (i == sent_sigslen) { | |
f63a17d6 | 2992 | if (!fatalerrs) |
717a265a | 2993 | return 1; |
f63a17d6 MC |
2994 | SSLfatal(s, SSL_AD_ILLEGAL_PARAMETER, |
2995 | SSL_F_TLS_CHOOSE_SIGALG, | |
2996 | SSL_R_WRONG_SIGNATURE_TYPE); | |
0972bc5c DSH |
2997 | return 0; |
2998 | } | |
2999 | } | |
3000 | } else { | |
7f6b466b | 3001 | if ((lu = tls1_get_legacy_sigalg(s, -1)) == NULL) { |
f63a17d6 | 3002 | if (!fatalerrs) |
717a265a | 3003 | return 1; |
f63a17d6 | 3004 | SSLfatal(s, SSL_AD_INTERNAL_ERROR, SSL_F_TLS_CHOOSE_SIGALG, |
a70535f8 | 3005 | SSL_R_NO_SUITABLE_SIGNATURE_ALGORITHM); |
0972bc5c DSH |
3006 | return 0; |
3007 | } | |
3008 | } | |
93a77f9e | 3009 | } |
b46867d7 DSH |
3010 | if (sig_idx == -1) |
3011 | sig_idx = lu->sig_idx; | |
555cbb32 TS |
3012 | s->s3.tmp.cert = &s->cert->pkeys[sig_idx]; |
3013 | s->cert->key = s->s3.tmp.cert; | |
3014 | s->s3.tmp.sigalg = lu; | |
93a77f9e DSH |
3015 | return 1; |
3016 | } | |
cf72c757 F |
3017 | |
3018 | int SSL_CTX_set_tlsext_max_fragment_length(SSL_CTX *ctx, uint8_t mode) | |
3019 | { | |
3020 | if (mode != TLSEXT_max_fragment_length_DISABLED | |
3021 | && !IS_MAX_FRAGMENT_LENGTH_EXT_VALID(mode)) { | |
3022 | SSLerr(SSL_F_SSL_CTX_SET_TLSEXT_MAX_FRAGMENT_LENGTH, | |
3023 | SSL_R_SSL3_EXT_INVALID_MAX_FRAGMENT_LENGTH); | |
3024 | return 0; | |
3025 | } | |
3026 | ||
3027 | ctx->ext.max_fragment_len_mode = mode; | |
3028 | return 1; | |
3029 | } | |
3030 | ||
3031 | int SSL_set_tlsext_max_fragment_length(SSL *ssl, uint8_t mode) | |
3032 | { | |
3033 | if (mode != TLSEXT_max_fragment_length_DISABLED | |
3034 | && !IS_MAX_FRAGMENT_LENGTH_EXT_VALID(mode)) { | |
3035 | SSLerr(SSL_F_SSL_SET_TLSEXT_MAX_FRAGMENT_LENGTH, | |
3036 | SSL_R_SSL3_EXT_INVALID_MAX_FRAGMENT_LENGTH); | |
3037 | return 0; | |
3038 | } | |
3039 | ||
3040 | ssl->ext.max_fragment_len_mode = mode; | |
3041 | return 1; | |
3042 | } | |
3043 | ||
3044 | uint8_t SSL_SESSION_get_max_fragment_length(const SSL_SESSION *session) | |
3045 | { | |
3046 | return session->ext.max_fragment_len_mode; | |
3047 | } | |
a76ce286 P |
3048 | |
3049 | /* | |
3050 | * Helper functions for HMAC access with legacy support included. | |
3051 | */ | |
3052 | SSL_HMAC *ssl_hmac_new(const SSL_CTX *ctx) | |
3053 | { | |
3054 | SSL_HMAC *ret = OPENSSL_zalloc(sizeof(*ret)); | |
3055 | EVP_MAC *mac = NULL; | |
3056 | ||
3057 | if (ret == NULL) | |
3058 | return NULL; | |
3059 | #ifndef OPENSSL_NO_DEPRECATED_3_0 | |
3060 | if (ctx->ext.ticket_key_evp_cb == NULL | |
3061 | && ctx->ext.ticket_key_cb != NULL) { | |
3062 | ret->old_ctx = HMAC_CTX_new(); | |
3063 | if (ret->old_ctx == NULL) | |
3064 | goto err; | |
3065 | return ret; | |
3066 | } | |
3067 | #endif | |
3068 | mac = EVP_MAC_fetch(ctx->libctx, "HMAC", NULL); | |
3069 | if (mac == NULL || (ret->ctx = EVP_MAC_CTX_new(mac)) == NULL) | |
3070 | goto err; | |
3071 | EVP_MAC_free(mac); | |
3072 | return ret; | |
3073 | err: | |
3074 | EVP_MAC_CTX_free(ret->ctx); | |
3075 | EVP_MAC_free(mac); | |
3076 | OPENSSL_free(ret); | |
3077 | return NULL; | |
3078 | } | |
3079 | ||
3080 | void ssl_hmac_free(SSL_HMAC *ctx) | |
3081 | { | |
3082 | if (ctx != NULL) { | |
3083 | EVP_MAC_CTX_free(ctx->ctx); | |
3084 | #ifndef OPENSSL_NO_DEPRECATED_3_0 | |
3085 | HMAC_CTX_free(ctx->old_ctx); | |
3086 | #endif | |
3087 | OPENSSL_free(ctx); | |
3088 | } | |
3089 | } | |
3090 | ||
3091 | #ifndef OPENSSL_NO_DEPRECATED_3_0 | |
3092 | HMAC_CTX *ssl_hmac_get0_HMAC_CTX(SSL_HMAC *ctx) | |
3093 | { | |
3094 | return ctx->old_ctx; | |
3095 | } | |
3096 | #endif | |
3097 | ||
3098 | EVP_MAC_CTX *ssl_hmac_get0_EVP_MAC_CTX(SSL_HMAC *ctx) | |
3099 | { | |
3100 | return ctx->ctx; | |
3101 | } | |
3102 | ||
3103 | int ssl_hmac_init(SSL_HMAC *ctx, void *key, size_t len, char *md) | |
3104 | { | |
3105 | OSSL_PARAM params[3], *p = params; | |
3106 | ||
3107 | if (ctx->ctx != NULL) { | |
3108 | *p++ = OSSL_PARAM_construct_utf8_string(OSSL_MAC_PARAM_DIGEST, md, 0); | |
3109 | *p++ = OSSL_PARAM_construct_octet_string(OSSL_KDF_PARAM_KEY, key, len); | |
3110 | *p = OSSL_PARAM_construct_end(); | |
3111 | if (EVP_MAC_CTX_set_params(ctx->ctx, params) && EVP_MAC_init(ctx->ctx)) | |
3112 | return 1; | |
3113 | } | |
3114 | #ifndef OPENSSL_NO_DEPRECATED_3_0 | |
3115 | if (ctx->old_ctx != NULL) | |
3116 | return HMAC_Init_ex(ctx->old_ctx, key, len, | |
3117 | EVP_get_digestbyname(md), NULL); | |
3118 | #endif | |
3119 | return 0; | |
3120 | } | |
3121 | ||
3122 | int ssl_hmac_update(SSL_HMAC *ctx, const unsigned char *data, size_t len) | |
3123 | { | |
3124 | if (ctx->ctx != NULL) | |
3125 | return EVP_MAC_update(ctx->ctx, data, len); | |
3126 | #ifndef OPENSSL_NO_DEPRECATED_3_0 | |
3127 | if (ctx->old_ctx != NULL) | |
3128 | return HMAC_Update(ctx->old_ctx, data, len); | |
3129 | #endif | |
3130 | return 0; | |
3131 | } | |
3132 | ||
3133 | int ssl_hmac_final(SSL_HMAC *ctx, unsigned char *md, size_t *len, | |
3134 | size_t max_size) | |
3135 | { | |
3136 | if (ctx->ctx != NULL) | |
3137 | return EVP_MAC_final(ctx->ctx, md, len, max_size); | |
3138 | #ifndef OPENSSL_NO_DEPRECATED_3_0 | |
3139 | if (ctx->old_ctx != NULL) { | |
3140 | unsigned int l; | |
3141 | ||
3142 | if (HMAC_Final(ctx->old_ctx, md, &l) > 0) { | |
3143 | if (len != NULL) | |
3144 | *len = l; | |
3145 | return 1; | |
3146 | } | |
3147 | } | |
3148 | #endif | |
3149 | return 0; | |
3150 | } | |
3151 | ||
3152 | size_t ssl_hmac_size(const SSL_HMAC *ctx) | |
3153 | { | |
3154 | if (ctx->ctx != NULL) | |
3155 | return EVP_MAC_size(ctx->ctx); | |
3156 | #ifndef OPENSSL_NO_DEPRECATED_3_0 | |
3157 | if (ctx->old_ctx != NULL) | |
3158 | return HMAC_size(ctx->old_ctx); | |
3159 | #endif | |
3160 | return 0; | |
3161 | } | |
3162 |