2 * Copyright 1995-2016 The OpenSSL Project Authors. All Rights Reserved.
4 * Licensed under the OpenSSL license (the "License"). You may not use
5 * this file except in compliance with the License. You can obtain a copy
6 * in the file LICENSE in the source distribution or at
7 * https://www.openssl.org/source/license.html
12 #include <openssl/objects.h>
13 #include <openssl/evp.h>
14 #include <openssl/hmac.h>
15 #include <openssl/ocsp.h>
16 #include <openssl/conf.h>
17 #include <openssl/x509v3.h>
18 #include <openssl/dh.h>
19 #include <openssl/bn.h>
21 #include <openssl/ct.h>
23 SSL3_ENC_METHOD const TLSv1_enc_data = {
27 tls1_generate_master_secret,
28 tls1_change_cipher_state,
29 tls1_final_finish_mac,
30 TLS_MD_CLIENT_FINISH_CONST, TLS_MD_CLIENT_FINISH_CONST_SIZE,
31 TLS_MD_SERVER_FINISH_CONST, TLS_MD_SERVER_FINISH_CONST_SIZE,
33 tls1_export_keying_material,
35 ssl3_set_handshake_header,
36 tls_close_construct_packet,
40 SSL3_ENC_METHOD const TLSv1_1_enc_data = {
44 tls1_generate_master_secret,
45 tls1_change_cipher_state,
46 tls1_final_finish_mac,
47 TLS_MD_CLIENT_FINISH_CONST, TLS_MD_CLIENT_FINISH_CONST_SIZE,
48 TLS_MD_SERVER_FINISH_CONST, TLS_MD_SERVER_FINISH_CONST_SIZE,
50 tls1_export_keying_material,
51 SSL_ENC_FLAG_EXPLICIT_IV,
52 ssl3_set_handshake_header,
53 tls_close_construct_packet,
57 SSL3_ENC_METHOD const TLSv1_2_enc_data = {
61 tls1_generate_master_secret,
62 tls1_change_cipher_state,
63 tls1_final_finish_mac,
64 TLS_MD_CLIENT_FINISH_CONST, TLS_MD_CLIENT_FINISH_CONST_SIZE,
65 TLS_MD_SERVER_FINISH_CONST, TLS_MD_SERVER_FINISH_CONST_SIZE,
67 tls1_export_keying_material,
68 SSL_ENC_FLAG_EXPLICIT_IV | SSL_ENC_FLAG_SIGALGS | SSL_ENC_FLAG_SHA256_PRF
69 | SSL_ENC_FLAG_TLS1_2_CIPHERS,
70 ssl3_set_handshake_header,
71 tls_close_construct_packet,
75 SSL3_ENC_METHOD const TLSv1_3_enc_data = {
78 tls13_setup_key_block,
79 tls13_generate_master_secret,
80 tls13_change_cipher_state,
81 tls13_final_finish_mac,
82 TLS_MD_CLIENT_FINISH_CONST, TLS_MD_CLIENT_FINISH_CONST_SIZE,
83 TLS_MD_SERVER_FINISH_CONST, TLS_MD_SERVER_FINISH_CONST_SIZE,
85 tls1_export_keying_material,
86 SSL_ENC_FLAG_SIGALGS | SSL_ENC_FLAG_SHA256_PRF,
87 ssl3_set_handshake_header,
88 tls_close_construct_packet,
92 long tls1_default_timeout(void)
95 * 2 hours, the 24 hours mentioned in the TLSv1 spec is way too long for
96 * http, the cache would over fill
105 s->method->ssl_clear(s);
109 void tls1_free(SSL *s)
111 OPENSSL_free(s->ext.session_ticket);
115 void tls1_clear(SSL *s)
118 if (s->method->version == TLS_ANY_VERSION)
119 s->version = TLS_MAX_VERSION;
121 s->version = s->method->version;
124 #ifndef OPENSSL_NO_EC
127 int nid; /* Curve NID */
128 int secbits; /* Bits of security (from SP800-57) */
129 unsigned int flags; /* Flags: currently just field type */
133 * Table of curve information.
134 * Do not delete entries or reorder this array! It is used as a lookup
135 * table: the index of each entry is one less than the TLS curve id.
137 static const tls_curve_info nid_list[] = {
138 {NID_sect163k1, 80, TLS_CURVE_CHAR2}, /* sect163k1 (1) */
139 {NID_sect163r1, 80, TLS_CURVE_CHAR2}, /* sect163r1 (2) */
140 {NID_sect163r2, 80, TLS_CURVE_CHAR2}, /* sect163r2 (3) */
141 {NID_sect193r1, 80, TLS_CURVE_CHAR2}, /* sect193r1 (4) */
142 {NID_sect193r2, 80, TLS_CURVE_CHAR2}, /* sect193r2 (5) */
143 {NID_sect233k1, 112, TLS_CURVE_CHAR2}, /* sect233k1 (6) */
144 {NID_sect233r1, 112, TLS_CURVE_CHAR2}, /* sect233r1 (7) */
145 {NID_sect239k1, 112, TLS_CURVE_CHAR2}, /* sect239k1 (8) */
146 {NID_sect283k1, 128, TLS_CURVE_CHAR2}, /* sect283k1 (9) */
147 {NID_sect283r1, 128, TLS_CURVE_CHAR2}, /* sect283r1 (10) */
148 {NID_sect409k1, 192, TLS_CURVE_CHAR2}, /* sect409k1 (11) */
149 {NID_sect409r1, 192, TLS_CURVE_CHAR2}, /* sect409r1 (12) */
150 {NID_sect571k1, 256, TLS_CURVE_CHAR2}, /* sect571k1 (13) */
151 {NID_sect571r1, 256, TLS_CURVE_CHAR2}, /* sect571r1 (14) */
152 {NID_secp160k1, 80, TLS_CURVE_PRIME}, /* secp160k1 (15) */
153 {NID_secp160r1, 80, TLS_CURVE_PRIME}, /* secp160r1 (16) */
154 {NID_secp160r2, 80, TLS_CURVE_PRIME}, /* secp160r2 (17) */
155 {NID_secp192k1, 80, TLS_CURVE_PRIME}, /* secp192k1 (18) */
156 {NID_X9_62_prime192v1, 80, TLS_CURVE_PRIME}, /* secp192r1 (19) */
157 {NID_secp224k1, 112, TLS_CURVE_PRIME}, /* secp224k1 (20) */
158 {NID_secp224r1, 112, TLS_CURVE_PRIME}, /* secp224r1 (21) */
159 {NID_secp256k1, 128, TLS_CURVE_PRIME}, /* secp256k1 (22) */
160 {NID_X9_62_prime256v1, 128, TLS_CURVE_PRIME}, /* secp256r1 (23) */
161 {NID_secp384r1, 192, TLS_CURVE_PRIME}, /* secp384r1 (24) */
162 {NID_secp521r1, 256, TLS_CURVE_PRIME}, /* secp521r1 (25) */
163 {NID_brainpoolP256r1, 128, TLS_CURVE_PRIME}, /* brainpoolP256r1 (26) */
164 {NID_brainpoolP384r1, 192, TLS_CURVE_PRIME}, /* brainpoolP384r1 (27) */
165 {NID_brainpoolP512r1, 256, TLS_CURVE_PRIME}, /* brainpool512r1 (28) */
166 {NID_X25519, 128, TLS_CURVE_CUSTOM}, /* X25519 (29) */
169 static const unsigned char ecformats_default[] = {
170 TLSEXT_ECPOINTFORMAT_uncompressed,
171 TLSEXT_ECPOINTFORMAT_ansiX962_compressed_prime,
172 TLSEXT_ECPOINTFORMAT_ansiX962_compressed_char2
175 /* The default curves */
176 static const unsigned char eccurves_default[] = {
177 0, 29, /* X25519 (29) */
178 0, 23, /* secp256r1 (23) */
179 0, 25, /* secp521r1 (25) */
180 0, 24, /* secp384r1 (24) */
183 static const unsigned char suiteb_curves[] = {
184 0, TLSEXT_curve_P_256,
185 0, TLSEXT_curve_P_384
188 int tls1_ec_curve_id2nid(int curve_id, unsigned int *pflags)
190 const tls_curve_info *cinfo;
191 /* ECC curves from RFC 4492 and RFC 7027 */
192 if ((curve_id < 1) || ((unsigned int)curve_id > OSSL_NELEM(nid_list)))
194 cinfo = nid_list + curve_id - 1;
196 *pflags = cinfo->flags;
200 int tls1_ec_nid2curve_id(int nid)
203 for (i = 0; i < OSSL_NELEM(nid_list); i++) {
204 if (nid_list[i].nid == nid)
211 * Get curves list, if "sess" is set return client curves otherwise
213 * Sets |num_curves| to the number of curves in the list, i.e.,
214 * the length of |pcurves| is 2 * num_curves.
215 * Returns 1 on success and 0 if the client curves list has invalid format.
216 * The latter indicates an internal error: we should not be accepting such
217 * lists in the first place.
218 * TODO(emilia): we should really be storing the curves list in explicitly
219 * parsed form instead. (However, this would affect binary compatibility
220 * so cannot happen in the 1.0.x series.)
222 int tls1_get_curvelist(SSL *s, int sess, const unsigned char **pcurves,
225 size_t pcurveslen = 0;
228 *pcurves = s->session->ext.supportedgroups;
229 pcurveslen = s->session->ext.supportedgroups_len;
231 /* For Suite B mode only include P-256, P-384 */
232 switch (tls1_suiteb(s)) {
233 case SSL_CERT_FLAG_SUITEB_128_LOS:
234 *pcurves = suiteb_curves;
235 pcurveslen = sizeof(suiteb_curves);
238 case SSL_CERT_FLAG_SUITEB_128_LOS_ONLY:
239 *pcurves = suiteb_curves;
243 case SSL_CERT_FLAG_SUITEB_192_LOS:
244 *pcurves = suiteb_curves + 2;
248 *pcurves = s->ext.supportedgroups;
249 pcurveslen = s->ext.supportedgroups_len;
252 *pcurves = eccurves_default;
253 pcurveslen = sizeof(eccurves_default);
257 /* We do not allow odd length arrays to enter the system. */
258 if (pcurveslen & 1) {
259 SSLerr(SSL_F_TLS1_GET_CURVELIST, ERR_R_INTERNAL_ERROR);
263 *num_curves = pcurveslen / 2;
267 /* See if curve is allowed by security callback */
268 int tls_curve_allowed(SSL *s, const unsigned char *curve, int op)
270 const tls_curve_info *cinfo;
273 if ((curve[1] < 1) || ((size_t)curve[1] > OSSL_NELEM(nid_list)))
275 cinfo = &nid_list[curve[1] - 1];
276 # ifdef OPENSSL_NO_EC2M
277 if (cinfo->flags & TLS_CURVE_CHAR2)
280 return ssl_security(s, op, cinfo->secbits, cinfo->nid, (void *)curve);
283 /* Check a curve is one of our preferences */
284 int tls1_check_curve(SSL *s, const unsigned char *p, size_t len)
286 const unsigned char *curves;
287 size_t num_curves, i;
288 unsigned int suiteb_flags = tls1_suiteb(s);
289 if (len != 3 || p[0] != NAMED_CURVE_TYPE)
291 /* Check curve matches Suite B preferences */
293 unsigned long cid = s->s3->tmp.new_cipher->id;
296 if (cid == TLS1_CK_ECDHE_ECDSA_WITH_AES_128_GCM_SHA256) {
297 if (p[2] != TLSEXT_curve_P_256)
299 } else if (cid == TLS1_CK_ECDHE_ECDSA_WITH_AES_256_GCM_SHA384) {
300 if (p[2] != TLSEXT_curve_P_384)
302 } else /* Should never happen */
305 if (!tls1_get_curvelist(s, 0, &curves, &num_curves))
307 for (i = 0; i < num_curves; i++, curves += 2) {
308 if (p[1] == curves[0] && p[2] == curves[1])
309 return tls_curve_allowed(s, p + 1, SSL_SECOP_CURVE_CHECK);
315 * For nmatch >= 0, return the NID of the |nmatch|th shared group or NID_undef
316 * if there is no match.
317 * For nmatch == -1, return number of matches
318 * For nmatch == -2, return the NID of the group to use for
319 * an EC tmp key, or NID_undef if there is no match.
321 int tls1_shared_group(SSL *s, int nmatch)
323 const unsigned char *pref, *supp;
324 size_t num_pref, num_supp, i, j;
327 /* Can't do anything on client side */
331 if (tls1_suiteb(s)) {
333 * For Suite B ciphersuite determines curve: we already know
334 * these are acceptable due to previous checks.
336 unsigned long cid = s->s3->tmp.new_cipher->id;
338 if (cid == TLS1_CK_ECDHE_ECDSA_WITH_AES_128_GCM_SHA256)
339 return NID_X9_62_prime256v1; /* P-256 */
340 if (cid == TLS1_CK_ECDHE_ECDSA_WITH_AES_256_GCM_SHA384)
341 return NID_secp384r1; /* P-384 */
342 /* Should never happen */
345 /* If not Suite B just return first preference shared curve */
349 * Avoid truncation. tls1_get_curvelist takes an int
350 * but s->options is a long...
352 if (!tls1_get_curvelist(s,
353 (s->options & SSL_OP_CIPHER_SERVER_PREFERENCE) != 0,
355 /* In practice, NID_undef == 0 but let's be precise. */
356 return nmatch == -1 ? 0 : NID_undef;
357 if (!tls1_get_curvelist(s,
358 (s->options & SSL_OP_CIPHER_SERVER_PREFERENCE) == 0,
360 return nmatch == -1 ? 0 : NID_undef;
362 for (k = 0, i = 0; i < num_pref; i++, pref += 2) {
363 const unsigned char *tsupp = supp;
365 for (j = 0; j < num_supp; j++, tsupp += 2) {
366 if (pref[0] == tsupp[0] && pref[1] == tsupp[1]) {
367 if (!tls_curve_allowed(s, pref, SSL_SECOP_CURVE_SHARED))
370 int id = (pref[0] << 8) | pref[1];
372 return tls1_ec_curve_id2nid(id, NULL);
380 /* Out of range (nmatch > k). */
384 int tls1_set_groups(unsigned char **pext, size_t *pextlen,
385 int *groups, size_t ngroups)
387 unsigned char *glist, *p;
390 * Bitmap of groups included to detect duplicates: only works while group
393 unsigned long dup_list = 0;
394 glist = OPENSSL_malloc(ngroups * 2);
397 for (i = 0, p = glist; i < ngroups; i++) {
398 unsigned long idmask;
400 /* TODO(TLS1.3): Convert for DH groups */
401 id = tls1_ec_nid2curve_id(groups[i]);
403 if (!id || (dup_list & idmask)) {
412 *pextlen = ngroups * 2;
416 # define MAX_CURVELIST 28
420 int nid_arr[MAX_CURVELIST];
423 static int nid_cb(const char *elem, int len, void *arg)
425 nid_cb_st *narg = arg;
431 if (narg->nidcnt == MAX_CURVELIST)
433 if (len > (int)(sizeof(etmp) - 1))
435 memcpy(etmp, elem, len);
437 nid = EC_curve_nist2nid(etmp);
438 if (nid == NID_undef)
439 nid = OBJ_sn2nid(etmp);
440 if (nid == NID_undef)
441 nid = OBJ_ln2nid(etmp);
442 if (nid == NID_undef)
444 for (i = 0; i < narg->nidcnt; i++)
445 if (narg->nid_arr[i] == nid)
447 narg->nid_arr[narg->nidcnt++] = nid;
451 /* Set groups based on a colon separate list */
452 int tls1_set_groups_list(unsigned char **pext, size_t *pextlen, const char *str)
456 if (!CONF_parse_list(str, ':', 1, nid_cb, &ncb))
460 return tls1_set_groups(pext, pextlen, ncb.nid_arr, ncb.nidcnt);
463 /* For an EC key set TLS id and required compression based on parameters */
464 static int tls1_set_ec_id(unsigned char *curve_id, unsigned char *comp_id,
471 /* Determine if it is a prime field */
472 grp = EC_KEY_get0_group(ec);
475 /* Determine curve ID */
476 id = EC_GROUP_get_curve_name(grp);
477 id = tls1_ec_nid2curve_id(id);
478 /* If no id return error: we don't support arbitrary explicit curves */
482 curve_id[1] = (unsigned char)id;
484 if (EC_KEY_get0_public_key(ec) == NULL)
486 if (EC_KEY_get_conv_form(ec) == POINT_CONVERSION_UNCOMPRESSED) {
487 *comp_id = TLSEXT_ECPOINTFORMAT_uncompressed;
489 if ((nid_list[id - 1].flags & TLS_CURVE_TYPE) == TLS_CURVE_PRIME)
490 *comp_id = TLSEXT_ECPOINTFORMAT_ansiX962_compressed_prime;
492 *comp_id = TLSEXT_ECPOINTFORMAT_ansiX962_compressed_char2;
498 /* Check an EC key is compatible with extensions */
499 static int tls1_check_ec_key(SSL *s,
500 unsigned char *curve_id, unsigned char *comp_id)
502 const unsigned char *pformats, *pcurves;
503 size_t num_formats, num_curves, i;
506 * If point formats extension present check it, otherwise everything is
507 * supported (see RFC4492).
509 if (comp_id && s->session->ext.ecpointformats) {
510 pformats = s->session->ext.ecpointformats;
511 num_formats = s->session->ext.ecpointformats_len;
512 for (i = 0; i < num_formats; i++, pformats++) {
513 if (*comp_id == *pformats)
516 if (i == num_formats)
521 /* Check curve is consistent with client and server preferences */
522 for (j = 0; j <= 1; j++) {
523 if (!tls1_get_curvelist(s, j, &pcurves, &num_curves))
525 if (j == 1 && num_curves == 0) {
527 * If we've not received any curves then skip this check.
528 * RFC 4492 does not require the supported elliptic curves extension
529 * so if it is not sent we can just choose any curve.
530 * It is invalid to send an empty list in the elliptic curves
531 * extension, so num_curves == 0 always means no extension.
535 for (i = 0; i < num_curves; i++, pcurves += 2) {
536 if (pcurves[0] == curve_id[0] && pcurves[1] == curve_id[1])
541 /* For clients can only check sent curve list */
548 void tls1_get_formatlist(SSL *s, const unsigned char **pformats,
552 * If we have a custom point format list use it otherwise use default
554 if (s->ext.ecpointformats) {
555 *pformats = s->ext.ecpointformats;
556 *num_formats = s->ext.ecpointformats_len;
558 *pformats = ecformats_default;
559 /* For Suite B we don't support char2 fields */
561 *num_formats = sizeof(ecformats_default) - 1;
563 *num_formats = sizeof(ecformats_default);
568 * Check cert parameters compatible with extensions: currently just checks EC
569 * certificates have compatible curves and compression.
571 static int tls1_check_cert_param(SSL *s, X509 *x, int set_ee_md)
573 unsigned char comp_id, curve_id[2];
576 pkey = X509_get0_pubkey(x);
579 /* If not EC nothing to do */
580 if (EVP_PKEY_id(pkey) != EVP_PKEY_EC)
582 rv = tls1_set_ec_id(curve_id, &comp_id, EVP_PKEY_get0_EC_KEY(pkey));
586 * Can't check curve_id for client certs as we don't have a supported
589 rv = tls1_check_ec_key(s, s->server ? curve_id : NULL, &comp_id);
593 * Special case for suite B. We *MUST* sign using SHA256+P-256 or
594 * SHA384+P-384, adjust digest if necessary.
596 if (set_ee_md && tls1_suiteb(s)) {
602 /* Check to see we have necessary signing algorithm */
603 if (curve_id[1] == TLSEXT_curve_P_256)
604 check_md = NID_ecdsa_with_SHA256;
605 else if (curve_id[1] == TLSEXT_curve_P_384)
606 check_md = NID_ecdsa_with_SHA384;
608 return 0; /* Should never happen */
609 for (i = 0; i < c->shared_sigalgslen; i++)
610 if (check_md == c->shared_sigalgs[i].signandhash_nid)
612 if (i == c->shared_sigalgslen)
614 if (set_ee_md == 2) {
615 if (check_md == NID_ecdsa_with_SHA256)
616 s->s3->tmp.md[SSL_PKEY_ECC] = EVP_sha256();
618 s->s3->tmp.md[SSL_PKEY_ECC] = EVP_sha384();
624 # ifndef OPENSSL_NO_EC
626 * tls1_check_ec_tmp_key - Check EC temporary key compatibility
628 * @cid: Cipher ID we're considering using
630 * Checks that the kECDHE cipher suite we're considering using
631 * is compatible with the client extensions.
633 * Returns 0 when the cipher can't be used or 1 when it can.
635 int tls1_check_ec_tmp_key(SSL *s, unsigned long cid)
638 * If Suite B, AES128 MUST use P-256 and AES256 MUST use P-384, no other
641 if (tls1_suiteb(s)) {
642 unsigned char curve_id[2];
643 /* Curve to check determined by ciphersuite */
644 if (cid == TLS1_CK_ECDHE_ECDSA_WITH_AES_128_GCM_SHA256)
645 curve_id[1] = TLSEXT_curve_P_256;
646 else if (cid == TLS1_CK_ECDHE_ECDSA_WITH_AES_256_GCM_SHA384)
647 curve_id[1] = TLSEXT_curve_P_384;
651 /* Check this curve is acceptable */
652 if (!tls1_check_ec_key(s, curve_id, NULL))
656 /* Need a shared curve */
657 if (tls1_shared_group(s, 0))
661 # endif /* OPENSSL_NO_EC */
665 static int tls1_check_cert_param(SSL *s, X509 *x, int set_ee_md)
670 #endif /* OPENSSL_NO_EC */
672 /* Default sigalg schemes */
673 static const uint16_t tls12_sigalgs[] = {
674 #ifndef OPENSSL_NO_EC
675 TLSEXT_SIGALG_ecdsa_secp256r1_sha256,
676 TLSEXT_SIGALG_ecdsa_secp384r1_sha384,
677 TLSEXT_SIGALG_ecdsa_secp521r1_sha512,
680 TLSEXT_SIGALG_rsa_pss_sha256,
681 TLSEXT_SIGALG_rsa_pss_sha384,
682 TLSEXT_SIGALG_rsa_pss_sha512,
684 TLSEXT_SIGALG_rsa_pkcs1_sha256,
685 TLSEXT_SIGALG_rsa_pkcs1_sha384,
686 TLSEXT_SIGALG_rsa_pkcs1_sha512,
688 #ifndef OPENSSL_NO_EC
689 TLSEXT_SIGALG_ecdsa_sha1,
691 TLSEXT_SIGALG_rsa_pkcs1_sha1,
692 #ifndef OPENSSL_NO_DSA
693 TLSEXT_SIGALG_dsa_sha1,
695 TLSEXT_SIGALG_dsa_sha256,
696 TLSEXT_SIGALG_dsa_sha384,
697 TLSEXT_SIGALG_dsa_sha512
701 #ifndef OPENSSL_NO_EC
702 static const uint16_t suiteb_sigalgs[] = {
703 TLSEXT_SIGALG_ecdsa_secp256r1_sha256,
704 TLSEXT_SIGALG_ecdsa_secp384r1_sha384
708 typedef struct sigalg_lookup_st {
717 static const SIGALG_LOOKUP sigalg_lookup_tbl[] = {
718 #ifndef OPENSSL_NO_EC
719 {"ecdsa_secp256r1_sha256", TLSEXT_SIGALG_ecdsa_secp256r1_sha256,
720 NID_sha256, EVP_PKEY_EC, NID_ecdsa_with_SHA256, NID_X9_62_prime256v1},
721 {"ecdsa_secp384r1_sha384", TLSEXT_SIGALG_ecdsa_secp384r1_sha384,
722 NID_sha384, EVP_PKEY_EC, NID_ecdsa_with_SHA384, NID_secp384r1},
723 {"ecdsa_secp521r1_sha512", TLSEXT_SIGALG_ecdsa_secp521r1_sha512,
724 NID_sha512, EVP_PKEY_EC, NID_ecdsa_with_SHA512, NID_secp521r1},
725 {NULL, TLSEXT_SIGALG_ecdsa_sha1,
726 NID_sha1, EVP_PKEY_EC, NID_ecdsa_with_SHA1, NID_undef},
728 {"rsa_pss_sha256", TLSEXT_SIGALG_rsa_pss_sha256,
729 NID_sha256, EVP_PKEY_RSA_PSS, NID_undef, NID_undef},
730 {"rsa_pss_sha384", TLSEXT_SIGALG_rsa_pss_sha384,
731 NID_sha384, EVP_PKEY_RSA_PSS, NID_undef, NID_undef},
732 {"rsa_pss_sha512", TLSEXT_SIGALG_rsa_pss_sha512,
733 NID_sha512, EVP_PKEY_RSA_PSS, NID_undef, NID_undef},
734 {"rsa_pkcs1_sha256", TLSEXT_SIGALG_rsa_pkcs1_sha256,
735 NID_sha256, EVP_PKEY_RSA, NID_sha256WithRSAEncryption, NID_undef},
736 {"rsa_pkcs1_sha384", TLSEXT_SIGALG_rsa_pkcs1_sha384,
737 NID_sha384, EVP_PKEY_RSA, NID_sha384WithRSAEncryption, NID_undef},
738 {"rsa_pkcs1_sha512", TLSEXT_SIGALG_rsa_pkcs1_sha512,
739 NID_sha512, EVP_PKEY_RSA, NID_sha512WithRSAEncryption, NID_undef},
740 {"rsa_pkcs1_sha1", TLSEXT_SIGALG_rsa_pkcs1_sha1,
741 NID_sha1, EVP_PKEY_RSA, NID_sha1WithRSAEncryption, NID_undef},
742 #ifndef OPENSSL_NO_DSA
743 {NULL, TLSEXT_SIGALG_dsa_sha256,
744 NID_sha256, EVP_PKEY_DSA, NID_dsa_with_SHA256, NID_undef},
745 {NULL, TLSEXT_SIGALG_dsa_sha384,
746 NID_sha384, EVP_PKEY_DSA, NID_undef, NID_undef},
747 {NULL, TLSEXT_SIGALG_dsa_sha512,
748 NID_sha512, EVP_PKEY_DSA, NID_undef, NID_undef},
749 {NULL, TLSEXT_SIGALG_dsa_sha1,
750 NID_sha1, EVP_PKEY_DSA, NID_dsaWithSHA1, NID_undef},
752 #ifndef OPENSSL_NO_GOST
753 {NULL, TLSEXT_SIGALG_gostr34102012_256_gostr34112012_256,
754 NID_id_GostR3411_2012_256, NID_id_GostR3410_2012_256, NID_undef,
756 {NULL, TLSEXT_SIGALG_gostr34102012_512_gostr34112012_512,
757 NID_id_GostR3411_2012_512, NID_id_GostR3410_2012_512, NID_undef,
759 {NULL, TLSEXT_SIGALG_gostr34102001_gostr3411,
760 NID_id_GostR3411_94, NID_id_GostR3410_2001, NID_undef, NID_undef}
764 static int tls_sigalg_get_hash(uint16_t sigalg)
767 const SIGALG_LOOKUP *curr;
769 for (i = 0, curr = sigalg_lookup_tbl; i < OSSL_NELEM(sigalg_lookup_tbl);
771 if (curr->sigalg == sigalg)
778 static int tls_sigalg_get_sig(uint16_t sigalg)
781 const SIGALG_LOOKUP *curr;
783 for (i = 0, curr = sigalg_lookup_tbl; i < OSSL_NELEM(sigalg_lookup_tbl);
785 if (curr->sigalg == sigalg)
792 size_t tls12_get_psigalgs(SSL *s, int sent, const uint16_t **psigs)
795 * If Suite B mode use Suite B sigalgs only, ignore any other
798 #ifndef OPENSSL_NO_EC
799 switch (tls1_suiteb(s)) {
800 case SSL_CERT_FLAG_SUITEB_128_LOS:
801 *psigs = suiteb_sigalgs;
802 return OSSL_NELEM(suiteb_sigalgs);
804 case SSL_CERT_FLAG_SUITEB_128_LOS_ONLY:
805 *psigs = suiteb_sigalgs;
808 case SSL_CERT_FLAG_SUITEB_192_LOS:
809 *psigs = suiteb_sigalgs + 1;
814 * We use client_sigalgs (if not NULL) if we're a server
815 * and sending a certificate request or if we're a client and
816 * determining which shared algorithm to use.
818 if ((s->server == sent) && s->cert->client_sigalgs != NULL) {
819 *psigs = s->cert->client_sigalgs;
820 return s->cert->client_sigalgslen;
821 } else if (s->cert->conf_sigalgs) {
822 *psigs = s->cert->conf_sigalgs;
823 return s->cert->conf_sigalgslen;
825 *psigs = tls12_sigalgs;
826 return OSSL_NELEM(tls12_sigalgs);
831 * Check signature algorithm is consistent with sent supported signature
832 * algorithms and if so set relevant digest and signature scheme in
835 int tls12_check_peer_sigalg(SSL *s, unsigned int sig, EVP_PKEY *pkey)
837 const uint16_t *sent_sigs;
838 const EVP_MD *md = NULL;
840 size_t sent_sigslen, i;
841 int pkeyid = EVP_PKEY_id(pkey);
843 /* Should never happen */
846 /* Check key type is consistent with signature */
847 peer_sigtype = tls_sigalg_get_sig(sig);
848 /* RSA keys can be used for RSA-PSS */
849 if (pkeyid != peer_sigtype
850 && (peer_sigtype != EVP_PKEY_RSA_PSS || pkeyid != EVP_PKEY_RSA)) {
851 SSLerr(SSL_F_TLS12_CHECK_PEER_SIGALG, SSL_R_WRONG_SIGNATURE_TYPE);
854 #ifndef OPENSSL_NO_EC
855 if (pkeyid == EVP_PKEY_EC) {
856 unsigned char curve_id[2], comp_id;
857 /* Check compression and curve matches extensions */
858 if (!tls1_set_ec_id(curve_id, &comp_id, EVP_PKEY_get0_EC_KEY(pkey)))
860 if (!s->server && !tls1_check_ec_key(s, curve_id, &comp_id)) {
861 SSLerr(SSL_F_TLS12_CHECK_PEER_SIGALG, SSL_R_WRONG_CURVE);
864 /* If Suite B only P-384+SHA384 or P-256+SHA-256 allowed */
865 if (tls1_suiteb(s)) {
868 if (curve_id[1] == TLSEXT_curve_P_256) {
869 if (tls_sigalg_get_hash(sig) != NID_sha256) {
870 SSLerr(SSL_F_TLS12_CHECK_PEER_SIGALG,
871 SSL_R_ILLEGAL_SUITEB_DIGEST);
874 } else if (curve_id[1] == TLSEXT_curve_P_384) {
875 if (tls_sigalg_get_hash(sig) != NID_sha384) {
876 SSLerr(SSL_F_TLS12_CHECK_PEER_SIGALG,
877 SSL_R_ILLEGAL_SUITEB_DIGEST);
883 } else if (tls1_suiteb(s))
887 /* Check signature matches a type we sent */
888 sent_sigslen = tls12_get_psigalgs(s, 1, &sent_sigs);
889 for (i = 0; i < sent_sigslen; i++, sent_sigs++) {
890 if (sig == *sent_sigs)
893 /* Allow fallback to SHA1 if not strict mode */
894 if (i == sent_sigslen
895 && (tls_sigalg_get_hash(sig) != NID_sha1
896 || s->cert->cert_flags & SSL_CERT_FLAGS_CHECK_TLS_STRICT)) {
897 SSLerr(SSL_F_TLS12_CHECK_PEER_SIGALG, SSL_R_WRONG_SIGNATURE_TYPE);
900 md = tls12_get_hash(tls_sigalg_get_hash(sig));
902 SSLerr(SSL_F_TLS12_CHECK_PEER_SIGALG, SSL_R_UNKNOWN_DIGEST);
906 * Make sure security callback allows algorithm. For historical reasons we
907 * have to pass the sigalg as a two byte char array.
909 sigalgstr[0] = (sig >> 8) & 0xff;
910 sigalgstr[1] = sig & 0xff;
911 if (!ssl_security(s, SSL_SECOP_SIGALG_CHECK,
912 EVP_MD_size(md) * 4, EVP_MD_type(md),
913 (void *)sigalgstr)) {
914 SSLerr(SSL_F_TLS12_CHECK_PEER_SIGALG, SSL_R_WRONG_SIGNATURE_TYPE);
918 * Store the digest used so applications can retrieve it if they wish.
920 s->s3->tmp.peer_md = md;
921 s->s3->tmp.peer_sigtype = peer_sigtype;
925 int SSL_get_peer_signature_type_nid(const SSL *s, int *pnid)
927 if (s->s3->tmp.peer_sigtype == NID_undef)
929 *pnid = s->s3->tmp.peer_sigtype;
934 * Set a mask of disabled algorithms: an algorithm is disabled if it isn't
935 * supported, doesn't appear in supported signature algorithms, isn't supported
936 * by the enabled protocol versions or by the security level.
938 * This function should only be used for checking which ciphers are supported
941 * Call ssl_cipher_disabled() to check that it's enabled or not.
943 void ssl_set_client_disabled(SSL *s)
945 s->s3->tmp.mask_a = 0;
946 s->s3->tmp.mask_k = 0;
947 ssl_set_sig_mask(&s->s3->tmp.mask_a, s, SSL_SECOP_SIGALG_MASK);
948 ssl_get_client_min_max_version(s, &s->s3->tmp.min_ver, &s->s3->tmp.max_ver);
949 #ifndef OPENSSL_NO_PSK
950 /* with PSK there must be client callback set */
951 if (!s->psk_client_callback) {
952 s->s3->tmp.mask_a |= SSL_aPSK;
953 s->s3->tmp.mask_k |= SSL_PSK;
955 #endif /* OPENSSL_NO_PSK */
956 #ifndef OPENSSL_NO_SRP
957 if (!(s->srp_ctx.srp_Mask & SSL_kSRP)) {
958 s->s3->tmp.mask_a |= SSL_aSRP;
959 s->s3->tmp.mask_k |= SSL_kSRP;
965 * ssl_cipher_disabled - check that a cipher is disabled or not
966 * @s: SSL connection that you want to use the cipher on
967 * @c: cipher to check
968 * @op: Security check that you want to do
970 * Returns 1 when it's disabled, 0 when enabled.
972 int ssl_cipher_disabled(SSL *s, const SSL_CIPHER *c, int op)
974 if (c->algorithm_mkey & s->s3->tmp.mask_k
975 || c->algorithm_auth & s->s3->tmp.mask_a)
977 if (s->s3->tmp.max_ver == 0)
979 if (!SSL_IS_DTLS(s) && ((c->min_tls > s->s3->tmp.max_ver)
980 || (c->max_tls < s->s3->tmp.min_ver)))
982 if (SSL_IS_DTLS(s) && (DTLS_VERSION_GT(c->min_dtls, s->s3->tmp.max_ver)
983 || DTLS_VERSION_LT(c->max_dtls, s->s3->tmp.min_ver)))
986 return !ssl_security(s, op, c->strength_bits, 0, (void *)c);
989 int tls_use_ticket(SSL *s)
991 if ((s->options & SSL_OP_NO_TICKET))
993 return ssl_security(s, SSL_SECOP_TICKET, 0, 0, NULL);
996 /* Initialise digests to default values */
997 void ssl_set_default_md(SSL *s)
999 const EVP_MD **pmd = s->s3->tmp.md;
1000 #ifndef OPENSSL_NO_DSA
1001 pmd[SSL_PKEY_DSA_SIGN] = ssl_md(SSL_MD_SHA1_IDX);
1003 #ifndef OPENSSL_NO_RSA
1004 if (SSL_USE_SIGALGS(s))
1005 pmd[SSL_PKEY_RSA_SIGN] = ssl_md(SSL_MD_SHA1_IDX);
1007 pmd[SSL_PKEY_RSA_SIGN] = ssl_md(SSL_MD_MD5_SHA1_IDX);
1008 pmd[SSL_PKEY_RSA_ENC] = pmd[SSL_PKEY_RSA_SIGN];
1010 #ifndef OPENSSL_NO_EC
1011 pmd[SSL_PKEY_ECC] = ssl_md(SSL_MD_SHA1_IDX);
1013 #ifndef OPENSSL_NO_GOST
1014 pmd[SSL_PKEY_GOST01] = ssl_md(SSL_MD_GOST94_IDX);
1015 pmd[SSL_PKEY_GOST12_256] = ssl_md(SSL_MD_GOST12_256_IDX);
1016 pmd[SSL_PKEY_GOST12_512] = ssl_md(SSL_MD_GOST12_512_IDX);
1020 int tls1_set_server_sigalgs(SSL *s)
1025 /* Clear any shared signature algorithms */
1026 OPENSSL_free(s->cert->shared_sigalgs);
1027 s->cert->shared_sigalgs = NULL;
1028 s->cert->shared_sigalgslen = 0;
1029 /* Clear certificate digests and validity flags */
1030 for (i = 0; i < SSL_PKEY_NUM; i++) {
1031 s->s3->tmp.md[i] = NULL;
1032 s->s3->tmp.valid_flags[i] = 0;
1035 /* If sigalgs received process it. */
1036 if (s->s3->tmp.peer_sigalgs) {
1037 if (!tls1_process_sigalgs(s)) {
1038 SSLerr(SSL_F_TLS1_SET_SERVER_SIGALGS, ERR_R_MALLOC_FAILURE);
1039 al = SSL_AD_INTERNAL_ERROR;
1042 /* Fatal error is no shared signature algorithms */
1043 if (!s->cert->shared_sigalgs) {
1044 SSLerr(SSL_F_TLS1_SET_SERVER_SIGALGS,
1045 SSL_R_NO_SHARED_SIGNATURE_ALGORITHMS);
1046 al = SSL_AD_ILLEGAL_PARAMETER;
1050 ssl_set_default_md(s);
1054 ssl3_send_alert(s, SSL3_AL_FATAL, al);
1059 * Gets the ticket information supplied by the client if any.
1061 * hello: The parsed ClientHello data
1062 * ret: (output) on return, if a ticket was decrypted, then this is set to
1063 * point to the resulting session.
1065 * If s->tls_session_secret_cb is set then we are expecting a pre-shared key
1066 * ciphersuite, in which case we have no use for session tickets and one will
1067 * never be decrypted, nor will s->ext.ticket_expected be set to 1.
1070 * -1: fatal error, either from parsing or decrypting the ticket.
1071 * 0: no ticket was found (or was ignored, based on settings).
1072 * 1: a zero length extension was found, indicating that the client supports
1073 * session tickets but doesn't currently have one to offer.
1074 * 2: either s->tls_session_secret_cb was set, or a ticket was offered but
1075 * couldn't be decrypted because of a non-fatal error.
1076 * 3: a ticket was successfully decrypted and *ret was set.
1079 * Sets s->ext.ticket_expected to 1 if the server will have to issue
1080 * a new session ticket to the client because the client indicated support
1081 * (and s->tls_session_secret_cb is NULL) but the client either doesn't have
1082 * a session ticket or we couldn't use the one it gave us, or if
1083 * s->ctx->ext.ticket_key_cb asked to renew the client's ticket.
1084 * Otherwise, s->ext.ticket_expected is set to 0.
1086 TICKET_RETURN tls_get_ticket_from_client(SSL *s, CLIENTHELLO_MSG *hello,
1091 RAW_EXTENSION *ticketext;
1094 s->ext.ticket_expected = 0;
1097 * If tickets disabled or not supported by the protocol version
1098 * (e.g. TLSv1.3) behave as if no ticket present to permit stateful
1101 if (s->version <= SSL3_VERSION || !tls_use_ticket(s))
1104 ticketext = &hello->pre_proc_exts[TLSEXT_IDX_session_ticket];
1105 if (!ticketext->present)
1108 size = PACKET_remaining(&ticketext->data);
1111 * The client will accept a ticket but doesn't currently have
1114 s->ext.ticket_expected = 1;
1115 return TICKET_EMPTY;
1117 if (s->ext.session_secret_cb) {
1119 * Indicate that the ticket couldn't be decrypted rather than
1120 * generating the session from ticket now, trigger
1121 * abbreviated handshake based on external mechanism to
1122 * calculate the master secret later.
1124 return TICKET_NO_DECRYPT;
1127 retv = tls_decrypt_ticket(s, PACKET_data(&ticketext->data), size,
1128 hello->session_id, hello->session_id_len, ret);
1130 case TICKET_NO_DECRYPT:
1131 s->ext.ticket_expected = 1;
1132 return TICKET_NO_DECRYPT;
1134 case TICKET_SUCCESS:
1135 return TICKET_SUCCESS;
1137 case TICKET_SUCCESS_RENEW:
1138 s->ext.ticket_expected = 1;
1139 return TICKET_SUCCESS;
1142 return TICKET_FATAL_ERR_OTHER;
1147 * tls_decrypt_ticket attempts to decrypt a session ticket.
1149 * etick: points to the body of the session ticket extension.
1150 * eticklen: the length of the session tickets extension.
1151 * sess_id: points at the session ID.
1152 * sesslen: the length of the session ID.
1153 * psess: (output) on return, if a ticket was decrypted, then this is set to
1154 * point to the resulting session.
1156 TICKET_RETURN tls_decrypt_ticket(SSL *s, const unsigned char *etick,
1157 size_t eticklen, const unsigned char *sess_id,
1158 size_t sesslen, SSL_SESSION **psess)
1161 unsigned char *sdec;
1162 const unsigned char *p;
1163 int slen, renew_ticket = 0, declen;
1164 TICKET_RETURN ret = TICKET_FATAL_ERR_OTHER;
1166 unsigned char tick_hmac[EVP_MAX_MD_SIZE];
1167 HMAC_CTX *hctx = NULL;
1168 EVP_CIPHER_CTX *ctx;
1169 SSL_CTX *tctx = s->initial_ctx;
1171 /* Initialize session ticket encryption and HMAC contexts */
1172 hctx = HMAC_CTX_new();
1174 return TICKET_FATAL_ERR_MALLOC;
1175 ctx = EVP_CIPHER_CTX_new();
1177 ret = TICKET_FATAL_ERR_MALLOC;
1180 if (tctx->ext.ticket_key_cb) {
1181 unsigned char *nctick = (unsigned char *)etick;
1182 int rv = tctx->ext.ticket_key_cb(s, nctick, nctick + 16,
1187 ret = TICKET_NO_DECRYPT;
1193 /* Check key name matches */
1194 if (memcmp(etick, tctx->ext.tick_key_name,
1195 sizeof(tctx->ext.tick_key_name)) != 0) {
1196 ret = TICKET_NO_DECRYPT;
1199 if (HMAC_Init_ex(hctx, tctx->ext.tick_hmac_key,
1200 sizeof(tctx->ext.tick_hmac_key),
1201 EVP_sha256(), NULL) <= 0
1202 || EVP_DecryptInit_ex(ctx, EVP_aes_256_cbc(), NULL,
1203 tctx->ext.tick_aes_key,
1205 + sizeof(tctx->ext.tick_key_name)) <= 0) {
1210 * Attempt to process session ticket, first conduct sanity and integrity
1213 mlen = HMAC_size(hctx);
1217 /* Sanity check ticket length: must exceed keyname + IV + HMAC */
1219 TLSEXT_KEYNAME_LENGTH + EVP_CIPHER_CTX_iv_length(ctx) + mlen) {
1220 ret = TICKET_NO_DECRYPT;
1224 /* Check HMAC of encrypted ticket */
1225 if (HMAC_Update(hctx, etick, eticklen) <= 0
1226 || HMAC_Final(hctx, tick_hmac, NULL) <= 0) {
1229 HMAC_CTX_free(hctx);
1230 if (CRYPTO_memcmp(tick_hmac, etick + eticklen, mlen)) {
1231 EVP_CIPHER_CTX_free(ctx);
1232 return TICKET_NO_DECRYPT;
1234 /* Attempt to decrypt session data */
1235 /* Move p after IV to start of encrypted ticket, update length */
1236 p = etick + 16 + EVP_CIPHER_CTX_iv_length(ctx);
1237 eticklen -= 16 + EVP_CIPHER_CTX_iv_length(ctx);
1238 sdec = OPENSSL_malloc(eticklen);
1239 if (sdec == NULL || EVP_DecryptUpdate(ctx, sdec, &slen, p,
1240 (int)eticklen) <= 0) {
1241 EVP_CIPHER_CTX_free(ctx);
1243 return TICKET_FATAL_ERR_OTHER;
1245 if (EVP_DecryptFinal(ctx, sdec + slen, &declen) <= 0) {
1246 EVP_CIPHER_CTX_free(ctx);
1248 return TICKET_NO_DECRYPT;
1251 EVP_CIPHER_CTX_free(ctx);
1255 sess = d2i_SSL_SESSION(NULL, &p, slen);
1259 * The session ID, if non-empty, is used by some clients to detect
1260 * that the ticket has been accepted. So we copy it to the session
1261 * structure. If it is empty set length to zero as required by
1265 memcpy(sess->session_id, sess_id, sesslen);
1266 sess->session_id_length = sesslen;
1269 return TICKET_SUCCESS_RENEW;
1271 return TICKET_SUCCESS;
1275 * For session parse failure, indicate that we need to send a new ticket.
1277 return TICKET_NO_DECRYPT;
1279 EVP_CIPHER_CTX_free(ctx);
1280 HMAC_CTX_free(hctx);
1284 int tls12_get_sigandhash(SSL *s, WPACKET *pkt, const EVP_PKEY *pk,
1285 const EVP_MD *md, int *ispss)
1289 const TLS_SIGALGS *curr;
1293 md_id = EVP_MD_type(md);
1294 sig_id = EVP_PKEY_id(pk);
1295 if (md_id == NID_undef)
1297 /* For TLS 1.3 only allow RSA-PSS */
1298 if (SSL_IS_TLS13(s) && sig_id == EVP_PKEY_RSA)
1299 sig_id = EVP_PKEY_RSA_PSS;
1301 for (i = 0, curr = s->cert->shared_sigalgs; i < s->cert->shared_sigalgslen;
1304 * Look for matching key and hash. If key type is RSA also match PSS
1307 if (curr->hash_nid == md_nid && (curr->sign_nid == sig_id
1308 || (sig_id == EVP_PKEY_RSA && curr->sign_nid == EVP_PKEY_RSA_PSS))){
1309 if (!WPACKET_put_bytes_u16(pkt, curr->rsigalg))
1311 *ispss = curr->sign_nid == EVP_PKEY_RSA_PSS;
1324 static const tls12_hash_info tls12_md_info[] = {
1325 {NID_md5, 64, SSL_MD_MD5_IDX},
1326 {NID_sha1, 80, SSL_MD_SHA1_IDX},
1327 {NID_sha224, 112, SSL_MD_SHA224_IDX},
1328 {NID_sha256, 128, SSL_MD_SHA256_IDX},
1329 {NID_sha384, 192, SSL_MD_SHA384_IDX},
1330 {NID_sha512, 256, SSL_MD_SHA512_IDX},
1331 {NID_id_GostR3411_94, 128, SSL_MD_GOST94_IDX},
1332 {NID_id_GostR3411_2012_256, 128, SSL_MD_GOST12_256_IDX},
1333 {NID_id_GostR3411_2012_512, 256, SSL_MD_GOST12_512_IDX},
1336 static const tls12_hash_info *tls12_get_hash_info(int hash_nid)
1339 if (hash_nid == NID_undef)
1342 for (i = 0; i < OSSL_NELEM(tls12_md_info); i++) {
1343 if (tls12_md_info[i].nid == hash_nid)
1344 return tls12_md_info + i;
1350 const EVP_MD *tls12_get_hash(int hash_nid)
1352 const tls12_hash_info *inf;
1353 if (hash_nid == NID_md5 && FIPS_mode())
1355 inf = tls12_get_hash_info(hash_nid);
1358 return ssl_md(inf->md_idx);
1361 static int tls12_get_pkey_idx(int sig_nid)
1364 #ifndef OPENSSL_NO_RSA
1366 return SSL_PKEY_RSA_SIGN;
1368 * For now return RSA key for PSS. When we support PSS only keys
1369 * this will need to be updated.
1371 case EVP_PKEY_RSA_PSS:
1372 return SSL_PKEY_RSA_SIGN;
1374 #ifndef OPENSSL_NO_DSA
1376 return SSL_PKEY_DSA_SIGN;
1378 #ifndef OPENSSL_NO_EC
1380 return SSL_PKEY_ECC;
1382 #ifndef OPENSSL_NO_GOST
1383 case NID_id_GostR3410_2001:
1384 return SSL_PKEY_GOST01;
1386 case NID_id_GostR3410_2012_256:
1387 return SSL_PKEY_GOST12_256;
1389 case NID_id_GostR3410_2012_512:
1390 return SSL_PKEY_GOST12_512;
1396 /* Convert TLS 1.2 signature algorithm extension values into NIDs */
1397 static void tls1_lookup_sigalg(int *phash_nid, int *psign_nid,
1398 int *psignhash_nid, uint16_t data)
1400 int sign_nid = NID_undef, hash_nid = NID_undef;
1401 if (!phash_nid && !psign_nid && !psignhash_nid)
1403 if (phash_nid || psignhash_nid) {
1404 hash_nid = tls_sigalg_get_hash(data);
1406 *phash_nid = hash_nid;
1408 if (psign_nid || psignhash_nid) {
1409 sign_nid = tls_sigalg_get_sig(data);
1411 *psign_nid = sign_nid;
1413 if (psignhash_nid) {
1414 if (sign_nid == NID_undef || hash_nid == NID_undef
1415 || OBJ_find_sigid_by_algs(psignhash_nid, hash_nid, sign_nid) <= 0)
1416 *psignhash_nid = NID_undef;
1420 /* Check to see if a signature algorithm is allowed */
1421 static int tls12_sigalg_allowed(SSL *s, int op, unsigned int ptmp)
1423 /* See if we have an entry in the hash table and it is enabled */
1424 const tls12_hash_info *hinf
1425 = tls12_get_hash_info(tls_sigalg_get_hash(ptmp));
1426 unsigned char sigalgstr[2];
1428 if (hinf == NULL || ssl_md(hinf->md_idx) == NULL)
1430 /* See if public key algorithm allowed */
1431 if (tls12_get_pkey_idx(tls_sigalg_get_sig(ptmp)) == -1)
1433 /* Finally see if security callback allows it */
1434 sigalgstr[0] = (ptmp >> 8) & 0xff;
1435 sigalgstr[1] = ptmp & 0xff;
1436 return ssl_security(s, op, hinf->secbits, hinf->nid, (void *)sigalgstr);
1440 * Get a mask of disabled public key algorithms based on supported signature
1441 * algorithms. For example if no signature algorithm supports RSA then RSA is
1445 void ssl_set_sig_mask(uint32_t *pmask_a, SSL *s, int op)
1447 const uint16_t *sigalgs;
1448 size_t i, sigalgslen;
1449 int have_rsa = 0, have_dsa = 0, have_ecdsa = 0;
1451 * Now go through all signature algorithms seeing if we support any for
1452 * RSA, DSA, ECDSA. Do this for all versions not just TLS 1.2. To keep
1453 * down calls to security callback only check if we have to.
1455 sigalgslen = tls12_get_psigalgs(s, 1, &sigalgs);
1456 for (i = 0; i < sigalgslen; i ++, sigalgs++) {
1457 switch (tls_sigalg_get_sig(*sigalgs)) {
1458 #ifndef OPENSSL_NO_RSA
1459 /* Any RSA-PSS signature algorithms also mean we allow RSA */
1460 case EVP_PKEY_RSA_PSS:
1462 if (!have_rsa && tls12_sigalg_allowed(s, op, *sigalgs))
1466 #ifndef OPENSSL_NO_DSA
1468 if (!have_dsa && tls12_sigalg_allowed(s, op, *sigalgs))
1472 #ifndef OPENSSL_NO_EC
1474 if (!have_ecdsa && tls12_sigalg_allowed(s, op, *sigalgs))
1481 *pmask_a |= SSL_aRSA;
1483 *pmask_a |= SSL_aDSS;
1485 *pmask_a |= SSL_aECDSA;
1488 int tls12_copy_sigalgs(SSL *s, WPACKET *pkt,
1489 const uint16_t *psig, size_t psiglen)
1493 for (i = 0; i < psiglen; i++, psig++) {
1494 if (tls12_sigalg_allowed(s, SSL_SECOP_SIGALG_SUPPORTED, *psig)) {
1495 if (!WPACKET_put_bytes_u16(pkt, *psig))
1502 /* Given preference and allowed sigalgs set shared sigalgs */
1503 static size_t tls12_shared_sigalgs(SSL *s, TLS_SIGALGS *shsig,
1504 const uint16_t *pref, size_t preflen,
1505 const uint16_t *allow, size_t allowlen)
1507 const uint16_t *ptmp, *atmp;
1508 size_t i, j, nmatch = 0;
1509 for (i = 0, ptmp = pref; i < preflen; i++, ptmp++) {
1510 /* Skip disabled hashes or signature algorithms */
1511 if (!tls12_sigalg_allowed(s, SSL_SECOP_SIGALG_SHARED, *ptmp))
1513 for (j = 0, atmp = allow; j < allowlen; j++, atmp++) {
1514 if (*ptmp == *atmp) {
1517 shsig->rsigalg = *ptmp;
1518 tls1_lookup_sigalg(&shsig->hash_nid,
1520 &shsig->signandhash_nid, *ptmp);
1530 /* Set shared signature algorithms for SSL structures */
1531 static int tls1_set_shared_sigalgs(SSL *s)
1533 const uint16_t *pref, *allow, *conf;
1534 size_t preflen, allowlen, conflen;
1536 TLS_SIGALGS *salgs = NULL;
1538 unsigned int is_suiteb = tls1_suiteb(s);
1540 OPENSSL_free(c->shared_sigalgs);
1541 c->shared_sigalgs = NULL;
1542 c->shared_sigalgslen = 0;
1543 /* If client use client signature algorithms if not NULL */
1544 if (!s->server && c->client_sigalgs && !is_suiteb) {
1545 conf = c->client_sigalgs;
1546 conflen = c->client_sigalgslen;
1547 } else if (c->conf_sigalgs && !is_suiteb) {
1548 conf = c->conf_sigalgs;
1549 conflen = c->conf_sigalgslen;
1551 conflen = tls12_get_psigalgs(s, 0, &conf);
1552 if (s->options & SSL_OP_CIPHER_SERVER_PREFERENCE || is_suiteb) {
1555 allow = s->s3->tmp.peer_sigalgs;
1556 allowlen = s->s3->tmp.peer_sigalgslen;
1560 pref = s->s3->tmp.peer_sigalgs;
1561 preflen = s->s3->tmp.peer_sigalgslen;
1563 nmatch = tls12_shared_sigalgs(s, NULL, pref, preflen, allow, allowlen);
1565 salgs = OPENSSL_malloc(nmatch * sizeof(TLS_SIGALGS));
1568 nmatch = tls12_shared_sigalgs(s, salgs, pref, preflen, allow, allowlen);
1572 c->shared_sigalgs = salgs;
1573 c->shared_sigalgslen = nmatch;
1577 /* Set preferred digest for each key type */
1579 int tls1_save_sigalgs(SSL *s, PACKET *pkt)
1585 /* Extension ignored for inappropriate versions */
1586 if (!SSL_USE_SIGALGS(s))
1588 /* Should never happen */
1592 size = PACKET_remaining(pkt);
1594 /* Invalid data length */
1595 if ((size & 1) != 0)
1600 OPENSSL_free(s->s3->tmp.peer_sigalgs);
1601 s->s3->tmp.peer_sigalgs = OPENSSL_malloc(size
1602 * sizeof(*s->s3->tmp.peer_sigalgs));
1603 if (s->s3->tmp.peer_sigalgs == NULL)
1605 s->s3->tmp.peer_sigalgslen = size;
1606 for (i = 0; i < size && PACKET_get_net_2(pkt, &stmp); i++)
1607 s->s3->tmp.peer_sigalgs[i] = stmp;
1615 int tls1_process_sigalgs(SSL *s)
1620 const EVP_MD **pmd = s->s3->tmp.md;
1621 uint32_t *pvalid = s->s3->tmp.valid_flags;
1623 TLS_SIGALGS *sigptr;
1624 if (!tls1_set_shared_sigalgs(s))
1627 for (i = 0, sigptr = c->shared_sigalgs;
1628 i < c->shared_sigalgslen; i++, sigptr++) {
1629 /* Ignore PKCS1 based sig algs in TLSv1.3 */
1630 if (SSL_IS_TLS13(s) && sigptr->sign_nid == EVP_PKEY_RSA)
1632 idx = tls12_get_pkey_idx(sigptr->sign_nid);
1633 if (idx > 0 && pmd[idx] == NULL) {
1634 md = tls12_get_hash(sigptr->hash_nid);
1636 pvalid[idx] = CERT_PKEY_EXPLICIT_SIGN;
1637 if (idx == SSL_PKEY_RSA_SIGN) {
1638 pvalid[SSL_PKEY_RSA_ENC] = CERT_PKEY_EXPLICIT_SIGN;
1639 pmd[SSL_PKEY_RSA_ENC] = md;
1645 * In strict mode or TLS1.3 leave unset digests as NULL to indicate we can't
1646 * use the certificate for signing.
1648 if (!(s->cert->cert_flags & SSL_CERT_FLAGS_CHECK_TLS_STRICT)
1649 && !SSL_IS_TLS13(s)) {
1651 * Set any remaining keys to default values. NOTE: if alg is not
1652 * supported it stays as NULL.
1654 #ifndef OPENSSL_NO_DSA
1655 if (pmd[SSL_PKEY_DSA_SIGN] == NULL)
1656 pmd[SSL_PKEY_DSA_SIGN] = EVP_sha1();
1658 #ifndef OPENSSL_NO_RSA
1659 if (pmd[SSL_PKEY_RSA_SIGN] == NULL) {
1660 pmd[SSL_PKEY_RSA_SIGN] = EVP_sha1();
1661 pmd[SSL_PKEY_RSA_ENC] = EVP_sha1();
1664 #ifndef OPENSSL_NO_EC
1665 if (pmd[SSL_PKEY_ECC] == NULL)
1666 pmd[SSL_PKEY_ECC] = EVP_sha1();
1668 #ifndef OPENSSL_NO_GOST
1669 if (pmd[SSL_PKEY_GOST01] == NULL)
1670 pmd[SSL_PKEY_GOST01] = EVP_get_digestbynid(NID_id_GostR3411_94);
1671 if (pmd[SSL_PKEY_GOST12_256] == NULL)
1672 pmd[SSL_PKEY_GOST12_256] =
1673 EVP_get_digestbynid(NID_id_GostR3411_2012_256);
1674 if (pmd[SSL_PKEY_GOST12_512] == NULL)
1675 pmd[SSL_PKEY_GOST12_512] =
1676 EVP_get_digestbynid(NID_id_GostR3411_2012_512);
1682 int SSL_get_sigalgs(SSL *s, int idx,
1683 int *psign, int *phash, int *psignhash,
1684 unsigned char *rsig, unsigned char *rhash)
1686 uint16_t *psig = s->s3->tmp.peer_sigalgs;
1687 size_t numsigalgs = s->s3->tmp.peer_sigalgslen;
1688 if (psig == NULL || numsigalgs > INT_MAX)
1691 if (idx >= (int)numsigalgs)
1695 *rhash = (unsigned char)((*psig >> 8) & 0xff);
1697 *rsig = (unsigned char)(*psig & 0xff);
1698 tls1_lookup_sigalg(phash, psign, psignhash, *psig);
1700 return (int)numsigalgs;
1703 int SSL_get_shared_sigalgs(SSL *s, int idx,
1704 int *psign, int *phash, int *psignhash,
1705 unsigned char *rsig, unsigned char *rhash)
1707 TLS_SIGALGS *shsigalgs = s->cert->shared_sigalgs;
1708 if (!shsigalgs || idx >= (int)s->cert->shared_sigalgslen
1709 || s->cert->shared_sigalgslen > INT_MAX)
1713 *phash = shsigalgs->hash_nid;
1715 *psign = shsigalgs->sign_nid;
1717 *psignhash = shsigalgs->signandhash_nid;
1719 *rsig = (unsigned char)(shsigalgs->rsigalg & 0xff);
1721 *rhash = (unsigned char)((shsigalgs->rsigalg >> 8) & 0xff);
1722 return (int)s->cert->shared_sigalgslen;
1725 #define MAX_SIGALGLEN (TLSEXT_hash_num * TLSEXT_signature_num * 2)
1729 int sigalgs[MAX_SIGALGLEN];
1732 static void get_sigorhash(int *psig, int *phash, const char *str)
1734 if (strcmp(str, "RSA") == 0) {
1735 *psig = EVP_PKEY_RSA;
1736 } else if (strcmp(str, "RSA-PSS") == 0 || strcmp(str, "PSS") == 0) {
1737 *psig = EVP_PKEY_RSA_PSS;
1738 } else if (strcmp(str, "DSA") == 0) {
1739 *psig = EVP_PKEY_DSA;
1740 } else if (strcmp(str, "ECDSA") == 0) {
1741 *psig = EVP_PKEY_EC;
1743 *phash = OBJ_sn2nid(str);
1744 if (*phash == NID_undef)
1745 *phash = OBJ_ln2nid(str);
1749 static int sig_cb(const char *elem, int len, void *arg)
1751 sig_cb_st *sarg = arg;
1754 int sig_alg = NID_undef, hash_alg = NID_undef;
1757 if (sarg->sigalgcnt == MAX_SIGALGLEN)
1759 if (len > (int)(sizeof(etmp) - 1))
1761 memcpy(etmp, elem, len);
1763 p = strchr(etmp, '+');
1771 get_sigorhash(&sig_alg, &hash_alg, etmp);
1772 get_sigorhash(&sig_alg, &hash_alg, p);
1774 if (sig_alg == NID_undef || hash_alg == NID_undef)
1777 for (i = 0; i < sarg->sigalgcnt; i += 2) {
1778 if (sarg->sigalgs[i] == sig_alg && sarg->sigalgs[i + 1] == hash_alg)
1781 sarg->sigalgs[sarg->sigalgcnt++] = hash_alg;
1782 sarg->sigalgs[sarg->sigalgcnt++] = sig_alg;
1787 * Set supported signature algorithms based on a colon separated list of the
1788 * form sig+hash e.g. RSA+SHA512:DSA+SHA512
1790 int tls1_set_sigalgs_list(CERT *c, const char *str, int client)
1794 if (!CONF_parse_list(str, ':', 1, sig_cb, &sig))
1798 return tls1_set_sigalgs(c, sig.sigalgs, sig.sigalgcnt, client);
1801 int tls1_set_sigalgs(CERT *c, const int *psig_nids, size_t salglen, int client)
1803 uint16_t *sigalgs, *sptr;
1808 sigalgs = OPENSSL_malloc((salglen / 2) * sizeof(*sigalgs));
1809 if (sigalgs == NULL)
1811 for (i = 0, sptr = sigalgs; i < salglen; i += 2) {
1813 const SIGALG_LOOKUP *curr;
1814 int md_id = *psig_nids++;
1815 int sig_id = *psig_nids++;
1817 for (j = 0, curr = sigalg_lookup_tbl; j < OSSL_NELEM(sigalg_lookup_tbl);
1819 if (curr->hash == md_id && curr->sig == sig_id) {
1820 *sptr++ = curr->sigalg;
1825 if (j == OSSL_NELEM(sigalg_lookup_tbl))
1830 OPENSSL_free(c->client_sigalgs);
1831 c->client_sigalgs = sigalgs;
1832 c->client_sigalgslen = salglen / 2;
1834 OPENSSL_free(c->conf_sigalgs);
1835 c->conf_sigalgs = sigalgs;
1836 c->conf_sigalgslen = salglen / 2;
1842 OPENSSL_free(sigalgs);
1846 static int tls1_check_sig_alg(CERT *c, X509 *x, int default_nid)
1850 if (default_nid == -1)
1852 sig_nid = X509_get_signature_nid(x);
1854 return sig_nid == default_nid ? 1 : 0;
1855 for (i = 0; i < c->shared_sigalgslen; i++)
1856 if (sig_nid == c->shared_sigalgs[i].signandhash_nid)
1861 /* Check to see if a certificate issuer name matches list of CA names */
1862 static int ssl_check_ca_name(STACK_OF(X509_NAME) *names, X509 *x)
1866 nm = X509_get_issuer_name(x);
1867 for (i = 0; i < sk_X509_NAME_num(names); i++) {
1868 if (!X509_NAME_cmp(nm, sk_X509_NAME_value(names, i)))
1875 * Check certificate chain is consistent with TLS extensions and is usable by
1876 * server. This servers two purposes: it allows users to check chains before
1877 * passing them to the server and it allows the server to check chains before
1878 * attempting to use them.
1881 /* Flags which need to be set for a certificate when stict mode not set */
1883 #define CERT_PKEY_VALID_FLAGS \
1884 (CERT_PKEY_EE_SIGNATURE|CERT_PKEY_EE_PARAM)
1885 /* Strict mode flags */
1886 #define CERT_PKEY_STRICT_FLAGS \
1887 (CERT_PKEY_VALID_FLAGS|CERT_PKEY_CA_SIGNATURE|CERT_PKEY_CA_PARAM \
1888 | CERT_PKEY_ISSUER_NAME|CERT_PKEY_CERT_TYPE)
1890 int tls1_check_chain(SSL *s, X509 *x, EVP_PKEY *pk, STACK_OF(X509) *chain,
1895 int check_flags = 0, strict_mode;
1896 CERT_PKEY *cpk = NULL;
1899 unsigned int suiteb_flags = tls1_suiteb(s);
1900 /* idx == -1 means checking server chains */
1902 /* idx == -2 means checking client certificate chains */
1905 idx = (int)(cpk - c->pkeys);
1907 cpk = c->pkeys + idx;
1908 pvalid = s->s3->tmp.valid_flags + idx;
1910 pk = cpk->privatekey;
1912 strict_mode = c->cert_flags & SSL_CERT_FLAGS_CHECK_TLS_STRICT;
1913 /* If no cert or key, forget it */
1919 idx = ssl_cert_type(x, pk);
1922 pvalid = s->s3->tmp.valid_flags + idx;
1924 if (c->cert_flags & SSL_CERT_FLAGS_CHECK_TLS_STRICT)
1925 check_flags = CERT_PKEY_STRICT_FLAGS;
1927 check_flags = CERT_PKEY_VALID_FLAGS;
1934 check_flags |= CERT_PKEY_SUITEB;
1935 ok = X509_chain_check_suiteb(NULL, x, chain, suiteb_flags);
1936 if (ok == X509_V_OK)
1937 rv |= CERT_PKEY_SUITEB;
1938 else if (!check_flags)
1943 * Check all signature algorithms are consistent with signature
1944 * algorithms extension if TLS 1.2 or later and strict mode.
1946 if (TLS1_get_version(s) >= TLS1_2_VERSION && strict_mode) {
1949 if (s->s3->tmp.peer_sigalgs)
1951 /* If no sigalgs extension use defaults from RFC5246 */
1954 case SSL_PKEY_RSA_ENC:
1955 case SSL_PKEY_RSA_SIGN:
1956 rsign = EVP_PKEY_RSA;
1957 default_nid = NID_sha1WithRSAEncryption;
1960 case SSL_PKEY_DSA_SIGN:
1961 rsign = EVP_PKEY_DSA;
1962 default_nid = NID_dsaWithSHA1;
1966 rsign = EVP_PKEY_EC;
1967 default_nid = NID_ecdsa_with_SHA1;
1970 case SSL_PKEY_GOST01:
1971 rsign = NID_id_GostR3410_2001;
1972 default_nid = NID_id_GostR3411_94_with_GostR3410_2001;
1975 case SSL_PKEY_GOST12_256:
1976 rsign = NID_id_GostR3410_2012_256;
1977 default_nid = NID_id_tc26_signwithdigest_gost3410_2012_256;
1980 case SSL_PKEY_GOST12_512:
1981 rsign = NID_id_GostR3410_2012_512;
1982 default_nid = NID_id_tc26_signwithdigest_gost3410_2012_512;
1991 * If peer sent no signature algorithms extension and we have set
1992 * preferred signature algorithms check we support sha1.
1994 if (default_nid > 0 && c->conf_sigalgs) {
1996 const uint16_t *p = c->conf_sigalgs;
1997 for (j = 0; j < c->conf_sigalgslen; j++, p++) {
1998 if (tls_sigalg_get_hash(*p) == NID_sha1
1999 && tls_sigalg_get_sig(*p) == rsign)
2002 if (j == c->conf_sigalgslen) {
2009 /* Check signature algorithm of each cert in chain */
2010 if (!tls1_check_sig_alg(c, x, default_nid)) {
2014 rv |= CERT_PKEY_EE_SIGNATURE;
2015 rv |= CERT_PKEY_CA_SIGNATURE;
2016 for (i = 0; i < sk_X509_num(chain); i++) {
2017 if (!tls1_check_sig_alg(c, sk_X509_value(chain, i), default_nid)) {
2019 rv &= ~CERT_PKEY_CA_SIGNATURE;
2026 /* Else not TLS 1.2, so mark EE and CA signing algorithms OK */
2027 else if (check_flags)
2028 rv |= CERT_PKEY_EE_SIGNATURE | CERT_PKEY_CA_SIGNATURE;
2030 /* Check cert parameters are consistent */
2031 if (tls1_check_cert_param(s, x, check_flags ? 1 : 2))
2032 rv |= CERT_PKEY_EE_PARAM;
2033 else if (!check_flags)
2036 rv |= CERT_PKEY_CA_PARAM;
2037 /* In strict mode check rest of chain too */
2038 else if (strict_mode) {
2039 rv |= CERT_PKEY_CA_PARAM;
2040 for (i = 0; i < sk_X509_num(chain); i++) {
2041 X509 *ca = sk_X509_value(chain, i);
2042 if (!tls1_check_cert_param(s, ca, 0)) {
2044 rv &= ~CERT_PKEY_CA_PARAM;
2051 if (!s->server && strict_mode) {
2052 STACK_OF(X509_NAME) *ca_dn;
2054 switch (EVP_PKEY_id(pk)) {
2056 check_type = TLS_CT_RSA_SIGN;
2059 check_type = TLS_CT_DSS_SIGN;
2062 check_type = TLS_CT_ECDSA_SIGN;
2066 const unsigned char *ctypes;
2070 ctypelen = (int)c->ctype_num;
2072 ctypes = (unsigned char *)s->s3->tmp.ctype;
2073 ctypelen = s->s3->tmp.ctype_num;
2075 for (i = 0; i < ctypelen; i++) {
2076 if (ctypes[i] == check_type) {
2077 rv |= CERT_PKEY_CERT_TYPE;
2081 if (!(rv & CERT_PKEY_CERT_TYPE) && !check_flags)
2084 rv |= CERT_PKEY_CERT_TYPE;
2086 ca_dn = s->s3->tmp.ca_names;
2088 if (!sk_X509_NAME_num(ca_dn))
2089 rv |= CERT_PKEY_ISSUER_NAME;
2091 if (!(rv & CERT_PKEY_ISSUER_NAME)) {
2092 if (ssl_check_ca_name(ca_dn, x))
2093 rv |= CERT_PKEY_ISSUER_NAME;
2095 if (!(rv & CERT_PKEY_ISSUER_NAME)) {
2096 for (i = 0; i < sk_X509_num(chain); i++) {
2097 X509 *xtmp = sk_X509_value(chain, i);
2098 if (ssl_check_ca_name(ca_dn, xtmp)) {
2099 rv |= CERT_PKEY_ISSUER_NAME;
2104 if (!check_flags && !(rv & CERT_PKEY_ISSUER_NAME))
2107 rv |= CERT_PKEY_ISSUER_NAME | CERT_PKEY_CERT_TYPE;
2109 if (!check_flags || (rv & check_flags) == check_flags)
2110 rv |= CERT_PKEY_VALID;
2114 if (TLS1_get_version(s) >= TLS1_2_VERSION) {
2115 if (*pvalid & CERT_PKEY_EXPLICIT_SIGN)
2116 rv |= CERT_PKEY_EXPLICIT_SIGN | CERT_PKEY_SIGN;
2117 else if (s->s3->tmp.md[idx] != NULL)
2118 rv |= CERT_PKEY_SIGN;
2120 rv |= CERT_PKEY_SIGN | CERT_PKEY_EXPLICIT_SIGN;
2123 * When checking a CERT_PKEY structure all flags are irrelevant if the
2127 if (rv & CERT_PKEY_VALID)
2130 /* Preserve explicit sign flag, clear rest */
2131 *pvalid &= CERT_PKEY_EXPLICIT_SIGN;
2138 /* Set validity of certificates in an SSL structure */
2139 void tls1_set_cert_validity(SSL *s)
2141 tls1_check_chain(s, NULL, NULL, NULL, SSL_PKEY_RSA_ENC);
2142 tls1_check_chain(s, NULL, NULL, NULL, SSL_PKEY_RSA_SIGN);
2143 tls1_check_chain(s, NULL, NULL, NULL, SSL_PKEY_DSA_SIGN);
2144 tls1_check_chain(s, NULL, NULL, NULL, SSL_PKEY_ECC);
2145 tls1_check_chain(s, NULL, NULL, NULL, SSL_PKEY_GOST01);
2146 tls1_check_chain(s, NULL, NULL, NULL, SSL_PKEY_GOST12_256);
2147 tls1_check_chain(s, NULL, NULL, NULL, SSL_PKEY_GOST12_512);
2150 /* User level utiity function to check a chain is suitable */
2151 int SSL_check_chain(SSL *s, X509 *x, EVP_PKEY *pk, STACK_OF(X509) *chain)
2153 return tls1_check_chain(s, x, pk, chain, -1);
2156 #ifndef OPENSSL_NO_DH
2157 DH *ssl_get_auto_dh(SSL *s)
2159 int dh_secbits = 80;
2160 if (s->cert->dh_tmp_auto == 2)
2161 return DH_get_1024_160();
2162 if (s->s3->tmp.new_cipher->algorithm_auth & (SSL_aNULL | SSL_aPSK)) {
2163 if (s->s3->tmp.new_cipher->strength_bits == 256)
2168 CERT_PKEY *cpk = ssl_get_server_send_pkey(s);
2169 dh_secbits = EVP_PKEY_security_bits(cpk->privatekey);
2172 if (dh_secbits >= 128) {
2180 if (dh_secbits >= 192)
2181 p = BN_get_rfc3526_prime_8192(NULL);
2183 p = BN_get_rfc3526_prime_3072(NULL);
2184 if (p == NULL || g == NULL || !DH_set0_pqg(dhp, p, NULL, g)) {
2192 if (dh_secbits >= 112)
2193 return DH_get_2048_224();
2194 return DH_get_1024_160();
2198 static int ssl_security_cert_key(SSL *s, SSL_CTX *ctx, X509 *x, int op)
2201 EVP_PKEY *pkey = X509_get0_pubkey(x);
2204 * If no parameters this will return -1 and fail using the default
2205 * security callback for any non-zero security level. This will
2206 * reject keys which omit parameters but this only affects DSA and
2207 * omission of parameters is never (?) done in practice.
2209 secbits = EVP_PKEY_security_bits(pkey);
2212 return ssl_security(s, op, secbits, 0, x);
2214 return ssl_ctx_security(ctx, op, secbits, 0, x);
2217 static int ssl_security_cert_sig(SSL *s, SSL_CTX *ctx, X509 *x, int op)
2219 /* Lookup signature algorithm digest */
2220 int secbits = -1, md_nid = NID_undef, sig_nid;
2221 /* Don't check signature if self signed */
2222 if ((X509_get_extension_flags(x) & EXFLAG_SS) != 0)
2224 sig_nid = X509_get_signature_nid(x);
2225 if (sig_nid && OBJ_find_sigid_algs(sig_nid, &md_nid, NULL)) {
2227 if (md_nid && (md = EVP_get_digestbynid(md_nid)))
2228 secbits = EVP_MD_size(md) * 4;
2231 return ssl_security(s, op, secbits, md_nid, x);
2233 return ssl_ctx_security(ctx, op, secbits, md_nid, x);
2236 int ssl_security_cert(SSL *s, SSL_CTX *ctx, X509 *x, int vfy, int is_ee)
2239 vfy = SSL_SECOP_PEER;
2241 if (!ssl_security_cert_key(s, ctx, x, SSL_SECOP_EE_KEY | vfy))
2242 return SSL_R_EE_KEY_TOO_SMALL;
2244 if (!ssl_security_cert_key(s, ctx, x, SSL_SECOP_CA_KEY | vfy))
2245 return SSL_R_CA_KEY_TOO_SMALL;
2247 if (!ssl_security_cert_sig(s, ctx, x, SSL_SECOP_CA_MD | vfy))
2248 return SSL_R_CA_MD_TOO_WEAK;
2253 * Check security of a chain, if sk includes the end entity certificate then
2254 * x is NULL. If vfy is 1 then we are verifying a peer chain and not sending
2255 * one to the peer. Return values: 1 if ok otherwise error code to use
2258 int ssl_security_cert_chain(SSL *s, STACK_OF(X509) *sk, X509 *x, int vfy)
2260 int rv, start_idx, i;
2262 x = sk_X509_value(sk, 0);
2267 rv = ssl_security_cert(s, NULL, x, vfy, 1);
2271 for (i = start_idx; i < sk_X509_num(sk); i++) {
2272 x = sk_X509_value(sk, i);
2273 rv = ssl_security_cert(s, NULL, x, vfy, 0);