X-Git-Url: https://git.openssl.org/?p=openssl.git;a=blobdiff_plain;f=ssl%2Ft1_lib.c;h=5f44f5a112beeb56bc57ee57c22787f6f98c65b0;hp=7b10d108f4bee33eb0cc06f2338ffc52cdb49bd8;hb=717a265aa5f618fb30f857f240f6b2b0ab7ad4c7;hpb=42ab22300074eeaf1283ccb983ae0b3830758293 diff --git a/ssl/t1_lib.c b/ssl/t1_lib.c index 7b10d108f4..5f44f5a112 100644 --- a/ssl/t1_lib.c +++ b/ssl/t1_lib.c @@ -20,10 +20,6 @@ #include "ssl_locl.h" #include -static int tls_decrypt_ticket(SSL *s, const unsigned char *tick, size_t ticklen, - const unsigned char *sess_id, size_t sesslen, - SSL_SESSION **psess); - SSL3_ENC_METHOD const TLSv1_enc_data = { tls1_enc, tls1_mac, @@ -184,43 +180,6 @@ static const unsigned char eccurves_default[] = { 0, 24, /* secp384r1 (24) */ }; -static const unsigned char eccurves_all[] = { - 0, 29, /* X25519 (29) */ - 0, 23, /* secp256r1 (23) */ - 0, 25, /* secp521r1 (25) */ - 0, 24, /* secp384r1 (24) */ - 0, 26, /* brainpoolP256r1 (26) */ - 0, 27, /* brainpoolP384r1 (27) */ - 0, 28, /* brainpool512r1 (28) */ - - /* - * Remaining curves disabled by default but still permitted if set - * via an explicit callback or parameters. - */ - 0, 22, /* secp256k1 (22) */ - 0, 14, /* sect571r1 (14) */ - 0, 13, /* sect571k1 (13) */ - 0, 11, /* sect409k1 (11) */ - 0, 12, /* sect409r1 (12) */ - 0, 9, /* sect283k1 (9) */ - 0, 10, /* sect283r1 (10) */ - 0, 20, /* secp224k1 (20) */ - 0, 21, /* secp224r1 (21) */ - 0, 18, /* secp192k1 (18) */ - 0, 19, /* secp192r1 (19) */ - 0, 15, /* secp160k1 (15) */ - 0, 16, /* secp160r1 (16) */ - 0, 17, /* secp160r2 (17) */ - 0, 8, /* sect239k1 (8) */ - 0, 6, /* sect233k1 (6) */ - 0, 7, /* sect233r1 (7) */ - 0, 4, /* sect193r1 (4) */ - 0, 5, /* sect193r2 (5) */ - 0, 1, /* sect163k1 (1) */ - 0, 2, /* sect163r1 (2) */ - 0, 3, /* sect163r2 (3) */ -}; - static const unsigned char suiteb_curves[] = { 0, TLSEXT_curve_P_256, 0, TLSEXT_curve_P_384 @@ -264,6 +223,7 @@ int tls1_get_curvelist(SSL *s, int sess, const unsigned char **pcurves, size_t *num_curves) { size_t pcurveslen = 0; + if (sess) { *pcurves = s->session->ext.supportedgroups; pcurveslen = s->session->ext.supportedgroups_len; @@ -299,10 +259,9 @@ int tls1_get_curvelist(SSL *s, int sess, const unsigned char **pcurves, SSLerr(SSL_F_TLS1_GET_CURVELIST, ERR_R_INTERNAL_ERROR); *num_curves = 0; return 0; - } else { - *num_curves = pcurveslen / 2; - return 1; } + *num_curves = pcurveslen / 2; + return 1; } /* See if curve is allowed by security callback */ @@ -364,6 +323,7 @@ int tls1_shared_group(SSL *s, int nmatch) const unsigned char *pref, *supp; size_t num_pref, num_supp, i, j; int k; + /* Can't do anything on client side */ if (s->server == 0) return -1; @@ -374,6 +334,7 @@ int tls1_shared_group(SSL *s, int nmatch) * these are acceptable due to previous checks. */ unsigned long cid = s->s3->tmp.new_cipher->id; + if (cid == TLS1_CK_ECDHE_ECDSA_WITH_AES_128_GCM_SHA256) return NID_X9_62_prime256v1; /* P-256 */ if (cid == TLS1_CK_ECDHE_ECDSA_WITH_AES_256_GCM_SHA384) @@ -388,37 +349,26 @@ int tls1_shared_group(SSL *s, int nmatch) * Avoid truncation. tls1_get_curvelist takes an int * but s->options is a long... */ - if (!tls1_get_curvelist - (s, (s->options & SSL_OP_CIPHER_SERVER_PREFERENCE) != 0, &supp, - &num_supp)) + if (!tls1_get_curvelist(s, + (s->options & SSL_OP_CIPHER_SERVER_PREFERENCE) != 0, + &supp, &num_supp)) /* In practice, NID_undef == 0 but let's be precise. */ return nmatch == -1 ? 0 : NID_undef; - if (!tls1_get_curvelist - (s, !(s->options & SSL_OP_CIPHER_SERVER_PREFERENCE), &pref, &num_pref)) + if (!tls1_get_curvelist(s, + (s->options & SSL_OP_CIPHER_SERVER_PREFERENCE) == 0, + &pref, &num_pref)) return nmatch == -1 ? 0 : NID_undef; - /* - * If the client didn't send the elliptic_curves extension all of them - * are allowed. - */ - if (num_supp == 0 && (s->options & SSL_OP_CIPHER_SERVER_PREFERENCE) != 0) { - supp = eccurves_all; - num_supp = sizeof(eccurves_all) / 2; - } else if (num_pref == 0 && - (s->options & SSL_OP_CIPHER_SERVER_PREFERENCE) == 0) { - pref = eccurves_all; - num_pref = sizeof(eccurves_all) / 2; - } - - k = 0; - for (i = 0; i < num_pref; i++, pref += 2) { + for (k = 0, i = 0; i < num_pref; i++, pref += 2) { const unsigned char *tsupp = supp; + for (j = 0; j < num_supp; j++, tsupp += 2) { if (pref[0] == tsupp[0] && pref[1] == tsupp[1]) { if (!tls_curve_allowed(s, pref, SSL_SECOP_CURVE_SHARED)) continue; if (nmatch == k) { int id = (pref[0] << 8) | pref[1]; + return tls1_ec_curve_id2nid(id, NULL); } k++; @@ -657,7 +607,7 @@ static int tls1_check_cert_param(SSL *s, X509 *x, int set_ee_md) else return 0; /* Should never happen */ for (i = 0; i < c->shared_sigalgslen; i++) - if (check_md == c->shared_sigalgs[i].signandhash_nid) + if (check_md == c->shared_sigalgs[i]->sigandhash) break; if (i == c->shared_sigalgslen) return 0; @@ -720,7 +670,7 @@ static int tls1_check_cert_param(SSL *s, X509 *x, int set_ee_md) #endif /* OPENSSL_NO_EC */ /* Default sigalg schemes */ -static const unsigned int tls12_sigalgs[] = { +static const uint16_t tls12_sigalgs[] = { #ifndef OPENSSL_NO_EC TLSEXT_SIGALG_ecdsa_secp256r1_sha256, TLSEXT_SIGALG_ecdsa_secp384r1_sha384, @@ -735,82 +685,163 @@ static const unsigned int tls12_sigalgs[] = { TLSEXT_SIGALG_rsa_pkcs1_sha384, TLSEXT_SIGALG_rsa_pkcs1_sha512, +#ifndef OPENSSL_NO_EC TLSEXT_SIGALG_ecdsa_sha1, +#endif TLSEXT_SIGALG_rsa_pkcs1_sha1, +#ifndef OPENSSL_NO_DSA TLSEXT_SIGALG_dsa_sha1, TLSEXT_SIGALG_dsa_sha256, TLSEXT_SIGALG_dsa_sha384, TLSEXT_SIGALG_dsa_sha512 +#endif }; #ifndef OPENSSL_NO_EC -static const unsigned int suiteb_sigalgs[] = { +static const uint16_t suiteb_sigalgs[] = { TLSEXT_SIGALG_ecdsa_secp256r1_sha256, TLSEXT_SIGALG_ecdsa_secp384r1_sha384 }; #endif -typedef struct sigalg_lookup_st { - unsigned int sigalg; - int hash; - int sig; -} SIGALG_LOOKUP; - -static SIGALG_LOOKUP sigalg_lookup_tbl[] = { - {TLSEXT_SIGALG_ecdsa_secp256r1_sha256, NID_sha256, EVP_PKEY_EC}, - {TLSEXT_SIGALG_ecdsa_secp384r1_sha384, NID_sha384, EVP_PKEY_EC}, - {TLSEXT_SIGALG_ecdsa_secp521r1_sha512, NID_sha512, EVP_PKEY_EC}, - {TLSEXT_SIGALG_ecdsa_sha1, NID_sha1, EVP_PKEY_EC}, - /* - * PSS must appear before PKCS1 so that we prefer that when signing where - * possible - */ - {TLSEXT_SIGALG_rsa_pss_sha256, NID_sha256, EVP_PKEY_RSA}, - {TLSEXT_SIGALG_rsa_pss_sha384, NID_sha384, EVP_PKEY_RSA}, - {TLSEXT_SIGALG_rsa_pss_sha512, NID_sha512, EVP_PKEY_RSA}, - {TLSEXT_SIGALG_rsa_pkcs1_sha256, NID_sha256, EVP_PKEY_RSA}, - {TLSEXT_SIGALG_rsa_pkcs1_sha384, NID_sha384, EVP_PKEY_RSA}, - {TLSEXT_SIGALG_rsa_pkcs1_sha512, NID_sha512, EVP_PKEY_RSA}, - {TLSEXT_SIGALG_rsa_pkcs1_sha1, NID_sha1, EVP_PKEY_RSA}, - {TLSEXT_SIGALG_dsa_sha256, NID_sha256, EVP_PKEY_DSA}, - {TLSEXT_SIGALG_dsa_sha384, NID_sha384, EVP_PKEY_DSA}, - {TLSEXT_SIGALG_dsa_sha512, NID_sha512, EVP_PKEY_DSA}, - {TLSEXT_SIGALG_dsa_sha1, NID_sha1, EVP_PKEY_DSA}, - {TLSEXT_SIGALG_gostr34102012_256_gostr34112012_256, NID_id_GostR3411_2012_256, NID_id_GostR3410_2012_256}, - {TLSEXT_SIGALG_gostr34102012_512_gostr34112012_512, NID_id_GostR3411_2012_512, NID_id_GostR3410_2012_512}, - {TLSEXT_SIGALG_gostr34102001_gostr3411, NID_id_GostR3411_94, NID_id_GostR3410_2001} +static const SIGALG_LOOKUP sigalg_lookup_tbl[] = { +#ifndef OPENSSL_NO_EC + {"ecdsa_secp256r1_sha256", TLSEXT_SIGALG_ecdsa_secp256r1_sha256, + NID_sha256, SSL_MD_SHA256_IDX, EVP_PKEY_EC, SSL_PKEY_ECC, + NID_ecdsa_with_SHA256, NID_X9_62_prime256v1}, + {"ecdsa_secp384r1_sha384", TLSEXT_SIGALG_ecdsa_secp384r1_sha384, + NID_sha384, SSL_MD_SHA384_IDX, EVP_PKEY_EC, SSL_PKEY_ECC, + NID_ecdsa_with_SHA384, NID_secp384r1}, + {"ecdsa_secp521r1_sha512", TLSEXT_SIGALG_ecdsa_secp521r1_sha512, + NID_sha512, SSL_MD_SHA512_IDX, EVP_PKEY_EC, SSL_PKEY_ECC, + NID_ecdsa_with_SHA512, NID_secp521r1}, + {NULL, TLSEXT_SIGALG_ecdsa_sha1, + NID_sha1, SSL_MD_SHA1_IDX, EVP_PKEY_EC, SSL_PKEY_ECC, + NID_ecdsa_with_SHA1, NID_undef}, +#endif + {"rsa_pss_sha256", TLSEXT_SIGALG_rsa_pss_sha256, + NID_sha256, SSL_MD_SHA256_IDX, EVP_PKEY_RSA_PSS, SSL_PKEY_RSA_PSS_SIGN, + NID_undef, NID_undef}, + {"rsa_pss_sha384", TLSEXT_SIGALG_rsa_pss_sha384, + NID_sha384, SSL_MD_SHA384_IDX, EVP_PKEY_RSA_PSS, SSL_PKEY_RSA_PSS_SIGN, + NID_undef, NID_undef}, + {"rsa_pss_sha512", TLSEXT_SIGALG_rsa_pss_sha512, + NID_sha512, SSL_MD_SHA512_IDX, EVP_PKEY_RSA_PSS, SSL_PKEY_RSA_PSS_SIGN, + NID_undef, NID_undef}, + {"rsa_pkcs1_sha256", TLSEXT_SIGALG_rsa_pkcs1_sha256, + NID_sha256, SSL_MD_SHA256_IDX, EVP_PKEY_RSA, SSL_PKEY_RSA, + NID_sha256WithRSAEncryption, NID_undef}, + {"rsa_pkcs1_sha384", TLSEXT_SIGALG_rsa_pkcs1_sha384, + NID_sha384, SSL_MD_SHA384_IDX, EVP_PKEY_RSA, SSL_PKEY_RSA, + NID_sha384WithRSAEncryption, NID_undef}, + {"rsa_pkcs1_sha512", TLSEXT_SIGALG_rsa_pkcs1_sha512, + NID_sha512, SSL_MD_SHA512_IDX, EVP_PKEY_RSA, SSL_PKEY_RSA, + NID_sha512WithRSAEncryption, NID_undef}, + {"rsa_pkcs1_sha1", TLSEXT_SIGALG_rsa_pkcs1_sha1, + NID_sha1, SSL_MD_SHA1_IDX, EVP_PKEY_RSA, SSL_PKEY_RSA, + NID_sha1WithRSAEncryption, NID_undef}, +#ifndef OPENSSL_NO_DSA + {NULL, TLSEXT_SIGALG_dsa_sha256, + NID_sha256, SSL_MD_SHA256_IDX, EVP_PKEY_DSA, SSL_PKEY_DSA_SIGN, + NID_dsa_with_SHA256, NID_undef}, + {NULL, TLSEXT_SIGALG_dsa_sha384, + NID_sha384, SSL_MD_SHA384_IDX, EVP_PKEY_DSA, SSL_PKEY_DSA_SIGN, + NID_undef, NID_undef}, + {NULL, TLSEXT_SIGALG_dsa_sha512, + NID_sha512, SSL_MD_SHA512_IDX, EVP_PKEY_DSA, SSL_PKEY_DSA_SIGN, + NID_undef, NID_undef}, + {NULL, TLSEXT_SIGALG_dsa_sha1, + NID_sha1, SSL_MD_SHA1_IDX, EVP_PKEY_DSA, SSL_PKEY_DSA_SIGN, + NID_dsaWithSHA1, NID_undef}, +#endif +#ifndef OPENSSL_NO_GOST + {NULL, TLSEXT_SIGALG_gostr34102012_256_gostr34112012_256, + NID_id_GostR3411_2012_256, SSL_MD_GOST12_256_IDX, + NID_id_GostR3410_2012_256, SSL_PKEY_GOST12_256, + NID_undef, NID_undef}, + {NULL, TLSEXT_SIGALG_gostr34102012_512_gostr34112012_512, + NID_id_GostR3411_2012_512, SSL_MD_GOST12_512_IDX, + NID_id_GostR3410_2012_512, SSL_PKEY_GOST12_512, + NID_undef, NID_undef}, + {NULL, TLSEXT_SIGALG_gostr34102001_gostr3411, + NID_id_GostR3411_94, SSL_MD_GOST94_IDX, + NID_id_GostR3410_2001, SSL_PKEY_GOST01, + NID_undef, NID_undef} +#endif +}; +/* Legacy sigalgs for TLS < 1.2 RSA TLS signatures */ +static const SIGALG_LOOKUP legacy_rsa_sigalg = { + "rsa_pkcs1_md5_sha1", 0, + NID_md5_sha1, SSL_MD_MD5_SHA1_IDX, + EVP_PKEY_RSA, SSL_PKEY_RSA, + NID_undef, NID_undef +}; + +/* + * Default signature algorithm values used if signature algorithms not present. + * From RFC5246. Note: order must match certificate index order. + */ +static const uint16_t tls_default_sigalg[] = { + TLSEXT_SIGALG_rsa_pkcs1_sha1, /* SSL_PKEY_RSA */ + TLSEXT_SIGALG_dsa_sha1, /* SSL_PKEY_DSA_SIGN */ + TLSEXT_SIGALG_ecdsa_sha1, /* SSL_PKEY_ECC */ + TLSEXT_SIGALG_gostr34102001_gostr3411, /* SSL_PKEY_GOST01 */ + TLSEXT_SIGALG_gostr34102012_256_gostr34112012_256, /* SSL_PKEY_GOST12_256 */ + TLSEXT_SIGALG_gostr34102012_512_gostr34112012_512 /* SSL_PKEY_GOST12_512 */ }; -static int tls_sigalg_get_hash(unsigned int sigalg) +/* Lookup TLS signature algorithm */ +static const SIGALG_LOOKUP *tls1_lookup_sigalg(uint16_t sigalg) { size_t i; - SIGALG_LOOKUP *curr; + const SIGALG_LOOKUP *s; - for (i = 0, curr = sigalg_lookup_tbl; i < OSSL_NELEM(sigalg_lookup_tbl); - i++, curr++) { - if (curr->sigalg == sigalg) - return curr->hash; + for (i = 0, s = sigalg_lookup_tbl; i < OSSL_NELEM(sigalg_lookup_tbl); + i++, s++) { + if (s->sigalg == sigalg) + return s; } - - return 0; + return NULL; } - -static int tls_sigalg_get_sig(unsigned int sigalg) +/* + * Return a signature algorithm for TLS < 1.2 where the signature type + * is fixed by the certificate type. + */ +static const SIGALG_LOOKUP *tls1_get_legacy_sigalg(const SSL *s, int idx) { - size_t i; - SIGALG_LOOKUP *curr; + if (idx < 0 || idx >= (int)OSSL_NELEM(tls_default_sigalg)) + return NULL; + if (SSL_USE_SIGALGS(s) || idx != SSL_PKEY_RSA) { + const SIGALG_LOOKUP *lu = tls1_lookup_sigalg(tls_default_sigalg[idx]); - for (i = 0, curr = sigalg_lookup_tbl; i < OSSL_NELEM(sigalg_lookup_tbl); - i++, curr++) { - if (curr->sigalg == sigalg) - return curr->sig; + if (lu == NULL || ssl_md(lu->hash_idx) == NULL) { + return NULL; + } + return lu; } + return &legacy_rsa_sigalg; +} +/* Set peer sigalg based key type */ +int tls1_set_peer_legacy_sigalg(SSL *s, const EVP_PKEY *pkey) +{ + int idx = ssl_cert_type(NULL, pkey); - return 0; + const SIGALG_LOOKUP *lu = tls1_get_legacy_sigalg(s, idx); + if (lu == NULL) + return 0; + s->s3->tmp.peer_sigalg = lu; + return 1; } -size_t tls12_get_psigalgs(SSL *s, const unsigned int **psigs) +static int tls_sigalg_get_sig(uint16_t sigalg) +{ + const SIGALG_LOOKUP *r = tls1_lookup_sigalg(sigalg); + + return r != NULL ? r->sig : 0; +} + +size_t tls12_get_psigalgs(SSL *s, int sent, const uint16_t **psigs) { /* * If Suite B mode use Suite B sigalgs only, ignore any other @@ -820,19 +851,23 @@ size_t tls12_get_psigalgs(SSL *s, const unsigned int **psigs) switch (tls1_suiteb(s)) { case SSL_CERT_FLAG_SUITEB_128_LOS: *psigs = suiteb_sigalgs; - return sizeof(suiteb_sigalgs); + return OSSL_NELEM(suiteb_sigalgs); case SSL_CERT_FLAG_SUITEB_128_LOS_ONLY: *psigs = suiteb_sigalgs; - return 2; + return 1; case SSL_CERT_FLAG_SUITEB_192_LOS: - *psigs = suiteb_sigalgs + 2; - return 2; + *psigs = suiteb_sigalgs + 1; + return 1; } #endif - /* If server use client authentication sigalgs if not NULL */ - if (s->server && s->cert->client_sigalgs) { + /* + * We use client_sigalgs (if not NULL) if we're a server + * and sending a certificate request or if we're a client and + * determining which shared algorithm to use. + */ + if ((s->server == sent) && s->cert->client_sigalgs != NULL) { *psigs = s->cert->client_sigalgs; return s->cert->client_sigalgslen; } else if (s->cert->conf_sigalgs) { @@ -846,71 +881,96 @@ size_t tls12_get_psigalgs(SSL *s, const unsigned int **psigs) /* * Check signature algorithm is consistent with sent supported signature - * algorithms and if so return relevant digest. + * algorithms and if so set relevant digest and signature scheme in + * s. */ -int tls12_check_peer_sigalg(const EVP_MD **pmd, SSL *s, unsigned int sig, - EVP_PKEY *pkey) +int tls12_check_peer_sigalg(SSL *s, uint16_t sig, EVP_PKEY *pkey) { - const unsigned int *sent_sigs; + const uint16_t *sent_sigs; + const EVP_MD *md = NULL; char sigalgstr[2]; size_t sent_sigslen, i; int pkeyid = EVP_PKEY_id(pkey); + const SIGALG_LOOKUP *lu; + /* Should never happen */ if (pkeyid == -1) return -1; - /* Check key type is consistent with signature */ - if (pkeyid != tls_sigalg_get_sig(sig)) { + /* Only allow PSS for TLS 1.3 */ + if (SSL_IS_TLS13(s) && pkeyid == EVP_PKEY_RSA) + pkeyid = EVP_PKEY_RSA_PSS; + lu = tls1_lookup_sigalg(sig); + /* + * Check sigalgs is known and key type is consistent with signature: + * RSA keys can be used for RSA-PSS + */ + if (lu == NULL || (pkeyid != lu->sig + && (lu->sig != EVP_PKEY_RSA_PSS || pkeyid != EVP_PKEY_RSA))) { SSLerr(SSL_F_TLS12_CHECK_PEER_SIGALG, SSL_R_WRONG_SIGNATURE_TYPE); return 0; } #ifndef OPENSSL_NO_EC if (pkeyid == EVP_PKEY_EC) { - unsigned char curve_id[2], comp_id; - /* Check compression and curve matches extensions */ - if (!tls1_set_ec_id(curve_id, &comp_id, EVP_PKEY_get0_EC_KEY(pkey))) - return 0; - if (!s->server && !tls1_check_ec_key(s, curve_id, &comp_id)) { - SSLerr(SSL_F_TLS12_CHECK_PEER_SIGALG, SSL_R_WRONG_CURVE); - return 0; - } - /* If Suite B only P-384+SHA384 or P-256+SHA-256 allowed */ - if (tls1_suiteb(s)) { - if (curve_id[0]) + EC_KEY *ec = EVP_PKEY_get0_EC_KEY(pkey); + int curve = EC_GROUP_get_curve_name(EC_KEY_get0_group(ec)); + + if (SSL_IS_TLS13(s)) { + /* For TLS 1.3 check curve matches signature algorithm */ + + if (lu->curve != NID_undef && curve != lu->curve) { + SSLerr(SSL_F_TLS12_CHECK_PEER_SIGALG, SSL_R_WRONG_CURVE); return 0; - if (curve_id[1] == TLSEXT_curve_P_256) { - if (tls_sigalg_get_hash(sig) != NID_sha256) { + } + } else { + unsigned char curve_id[2], comp_id; + + /* Check compression and curve matches extensions */ + if (!tls1_set_ec_id(curve_id, &comp_id, ec)) + return 0; + if (!s->server && !tls1_check_ec_key(s, curve_id, &comp_id)) { + SSLerr(SSL_F_TLS12_CHECK_PEER_SIGALG, SSL_R_WRONG_CURVE); + return 0; + } + if (tls1_suiteb(s)) { + /* Check sigalg matches a permissible Suite B value */ + if (sig != TLSEXT_SIGALG_ecdsa_secp256r1_sha256 + && sig != TLSEXT_SIGALG_ecdsa_secp384r1_sha384) { SSLerr(SSL_F_TLS12_CHECK_PEER_SIGALG, - SSL_R_ILLEGAL_SUITEB_DIGEST); + SSL_R_WRONG_SIGNATURE_TYPE); return 0; } - } else if (curve_id[1] == TLSEXT_curve_P_384) { - if (tls_sigalg_get_hash(sig) != NID_sha384) { + /* + * Suite B also requires P-256+SHA256 and P-384+SHA384: + * this matches the TLS 1.3 requirements so we can just + * check the curve is the expected TLS 1.3 value. + * If this fails an inappropriate digest is being used. + */ + if (curve != lu->curve) { SSLerr(SSL_F_TLS12_CHECK_PEER_SIGALG, SSL_R_ILLEGAL_SUITEB_DIGEST); return 0; } - } else - return 0; + } } - } else if (tls1_suiteb(s)) + } else if (tls1_suiteb(s)) { return 0; + } #endif /* Check signature matches a type we sent */ - sent_sigslen = tls12_get_psigalgs(s, &sent_sigs); + sent_sigslen = tls12_get_psigalgs(s, 1, &sent_sigs); for (i = 0; i < sent_sigslen; i++, sent_sigs++) { if (sig == *sent_sigs) break; } /* Allow fallback to SHA1 if not strict mode */ - if (i == sent_sigslen - && (tls_sigalg_get_hash(sig) != NID_sha1 - || s->cert->cert_flags & SSL_CERT_FLAGS_CHECK_TLS_STRICT)) { + if (i == sent_sigslen && (lu->hash != NID_sha1 + || s->cert->cert_flags & SSL_CERT_FLAGS_CHECK_TLS_STRICT)) { SSLerr(SSL_F_TLS12_CHECK_PEER_SIGALG, SSL_R_WRONG_SIGNATURE_TYPE); return 0; } - *pmd = tls12_get_hash(tls_sigalg_get_hash(sig)); - if (*pmd == NULL) { + md = ssl_md(lu->hash_idx); + if (md == NULL) { SSLerr(SSL_F_TLS12_CHECK_PEER_SIGALG, SSL_R_UNKNOWN_DIGEST); return 0; } @@ -921,15 +981,21 @@ int tls12_check_peer_sigalg(const EVP_MD **pmd, SSL *s, unsigned int sig, sigalgstr[0] = (sig >> 8) & 0xff; sigalgstr[1] = sig & 0xff; if (!ssl_security(s, SSL_SECOP_SIGALG_CHECK, - EVP_MD_size(*pmd) * 4, EVP_MD_type(*pmd), + EVP_MD_size(md) * 4, EVP_MD_type(md), (void *)sigalgstr)) { SSLerr(SSL_F_TLS12_CHECK_PEER_SIGALG, SSL_R_WRONG_SIGNATURE_TYPE); return 0; } - /* - * Store the digest used so applications can retrieve it if they wish. - */ - s->s3->tmp.peer_md = *pmd; + /* Store the sigalg the peer uses */ + s->s3->tmp.peer_sigalg = lu; + return 1; +} + +int SSL_get_peer_signature_type_nid(const SSL *s, int *pnid) +{ + if (s->s3->tmp.peer_sigalg == NULL) + return 0; + *pnid = s->s3->tmp.peer_sigalg->sig; return 1; } @@ -991,7 +1057,7 @@ int ssl_cipher_disabled(SSL *s, const SSL_CIPHER *c, int op) int tls_use_ticket(SSL *s) { - if ((s->options & SSL_OP_NO_TICKET) || SSL_IS_TLS13(s)) + if ((s->options & SSL_OP_NO_TICKET)) return 0; return ssl_security(s, SSL_SECOP_TICKET, 0, 0, NULL); } @@ -1005,10 +1071,9 @@ void ssl_set_default_md(SSL *s) #endif #ifndef OPENSSL_NO_RSA if (SSL_USE_SIGALGS(s)) - pmd[SSL_PKEY_RSA_SIGN] = ssl_md(SSL_MD_SHA1_IDX); + pmd[SSL_PKEY_RSA] = ssl_md(SSL_MD_SHA1_IDX); else - pmd[SSL_PKEY_RSA_SIGN] = ssl_md(SSL_MD_MD5_SHA1_IDX); - pmd[SSL_PKEY_RSA_ENC] = pmd[SSL_PKEY_RSA_SIGN]; + pmd[SSL_PKEY_RSA] = ssl_md(SSL_MD_MD5_SHA1_IDX); #endif #ifndef OPENSSL_NO_EC pmd[SSL_PKEY_ECC] = ssl_md(SSL_MD_SHA1_IDX); @@ -1086,8 +1151,8 @@ int tls1_set_server_sigalgs(SSL *s) * s->ctx->ext.ticket_key_cb asked to renew the client's ticket. * Otherwise, s->ext.ticket_expected is set to 0. */ -int tls_get_ticket_from_client(SSL *s, CLIENTHELLO_MSG *hello, - SSL_SESSION **ret) +TICKET_RETURN tls_get_ticket_from_client(SSL *s, CLIENTHELLO_MSG *hello, + SSL_SESSION **ret) { int retv; size_t size; @@ -1102,11 +1167,11 @@ int tls_get_ticket_from_client(SSL *s, CLIENTHELLO_MSG *hello, * resumption. */ if (s->version <= SSL3_VERSION || !tls_use_ticket(s)) - return 0; + return TICKET_NONE; ticketext = &hello->pre_proc_exts[TLSEXT_IDX_session_ticket]; if (!ticketext->present) - return 0; + return TICKET_NONE; size = PACKET_remaining(&ticketext->data); if (size == 0) { @@ -1115,7 +1180,7 @@ int tls_get_ticket_from_client(SSL *s, CLIENTHELLO_MSG *hello, * one. */ s->ext.ticket_expected = 1; - return 1; + return TICKET_EMPTY; } if (s->ext.session_secret_cb) { /* @@ -1124,25 +1189,25 @@ int tls_get_ticket_from_client(SSL *s, CLIENTHELLO_MSG *hello, * abbreviated handshake based on external mechanism to * calculate the master secret later. */ - return 2; + return TICKET_NO_DECRYPT; } retv = tls_decrypt_ticket(s, PACKET_data(&ticketext->data), size, hello->session_id, hello->session_id_len, ret); switch (retv) { - case 2: /* ticket couldn't be decrypted */ + case TICKET_NO_DECRYPT: s->ext.ticket_expected = 1; - return 2; + return TICKET_NO_DECRYPT; - case 3: /* ticket was decrypted */ - return 3; + case TICKET_SUCCESS: + return TICKET_SUCCESS; - case 4: /* ticket decrypted but need to renew */ + case TICKET_SUCCESS_RENEW: s->ext.ticket_expected = 1; - return 3; + return TICKET_SUCCESS; - default: /* fatal error */ - return -1; + default: + return TICKET_FATAL_ERR_OTHER; } } @@ -1155,35 +1220,29 @@ int tls_get_ticket_from_client(SSL *s, CLIENTHELLO_MSG *hello, * sesslen: the length of the session ID. * psess: (output) on return, if a ticket was decrypted, then this is set to * point to the resulting session. - * - * Returns: - * -2: fatal error, malloc failure. - * -1: fatal error, either from parsing or decrypting the ticket. - * 2: the ticket couldn't be decrypted. - * 3: a ticket was successfully decrypted and *psess was set. - * 4: same as 3, but the ticket needs to be renewed. */ -static int tls_decrypt_ticket(SSL *s, const unsigned char *etick, - size_t eticklen, const unsigned char *sess_id, - size_t sesslen, SSL_SESSION **psess) +TICKET_RETURN tls_decrypt_ticket(SSL *s, const unsigned char *etick, + size_t eticklen, const unsigned char *sess_id, + size_t sesslen, SSL_SESSION **psess) { SSL_SESSION *sess; unsigned char *sdec; const unsigned char *p; - int slen, renew_ticket = 0, ret = -1, declen; + int slen, renew_ticket = 0, declen; + TICKET_RETURN ret = TICKET_FATAL_ERR_OTHER; size_t mlen; unsigned char tick_hmac[EVP_MAX_MD_SIZE]; HMAC_CTX *hctx = NULL; EVP_CIPHER_CTX *ctx; - SSL_CTX *tctx = s->initial_ctx; + SSL_CTX *tctx = s->session_ctx; /* Initialize session ticket encryption and HMAC contexts */ hctx = HMAC_CTX_new(); if (hctx == NULL) - return -2; + return TICKET_FATAL_ERR_MALLOC; ctx = EVP_CIPHER_CTX_new(); if (ctx == NULL) { - ret = -2; + ret = TICKET_FATAL_ERR_MALLOC; goto err; } if (tctx->ext.ticket_key_cb) { @@ -1193,7 +1252,7 @@ static int tls_decrypt_ticket(SSL *s, const unsigned char *etick, if (rv < 0) goto err; if (rv == 0) { - ret = 2; + ret = TICKET_NO_DECRYPT; goto err; } if (rv == 2) @@ -1202,7 +1261,7 @@ static int tls_decrypt_ticket(SSL *s, const unsigned char *etick, /* Check key name matches */ if (memcmp(etick, tctx->ext.tick_key_name, sizeof(tctx->ext.tick_key_name)) != 0) { - ret = 2; + ret = TICKET_NO_DECRYPT; goto err; } if (HMAC_Init_ex(hctx, tctx->ext.tick_hmac_key, @@ -1210,8 +1269,8 @@ static int tls_decrypt_ticket(SSL *s, const unsigned char *etick, EVP_sha256(), NULL) <= 0 || EVP_DecryptInit_ex(ctx, EVP_aes_256_cbc(), NULL, tctx->ext.tick_aes_key, - etick + sizeof(tctx->ext.tick_key_name)) <= - 0) { + etick + + sizeof(tctx->ext.tick_key_name)) <= 0) { goto err; } } @@ -1226,7 +1285,7 @@ static int tls_decrypt_ticket(SSL *s, const unsigned char *etick, /* Sanity check ticket length: must exceed keyname + IV + HMAC */ if (eticklen <= TLSEXT_KEYNAME_LENGTH + EVP_CIPHER_CTX_iv_length(ctx) + mlen) { - ret = 2; + ret = TICKET_NO_DECRYPT; goto err; } eticklen -= mlen; @@ -1238,23 +1297,23 @@ static int tls_decrypt_ticket(SSL *s, const unsigned char *etick, HMAC_CTX_free(hctx); if (CRYPTO_memcmp(tick_hmac, etick + eticklen, mlen)) { EVP_CIPHER_CTX_free(ctx); - return 2; + return TICKET_NO_DECRYPT; } /* Attempt to decrypt session data */ /* Move p after IV to start of encrypted ticket, update length */ - p = etick + 16 + EVP_CIPHER_CTX_iv_length(ctx); - eticklen -= 16 + EVP_CIPHER_CTX_iv_length(ctx); + p = etick + TLSEXT_KEYNAME_LENGTH + EVP_CIPHER_CTX_iv_length(ctx); + eticklen -= TLSEXT_KEYNAME_LENGTH + EVP_CIPHER_CTX_iv_length(ctx); sdec = OPENSSL_malloc(eticklen); if (sdec == NULL || EVP_DecryptUpdate(ctx, sdec, &slen, p, (int)eticklen) <= 0) { EVP_CIPHER_CTX_free(ctx); OPENSSL_free(sdec); - return -1; + return TICKET_FATAL_ERR_OTHER; } if (EVP_DecryptFinal(ctx, sdec + slen, &declen) <= 0) { EVP_CIPHER_CTX_free(ctx); OPENSSL_free(sdec); - return 2; + return TICKET_NO_DECRYPT; } slen += declen; EVP_CIPHER_CTX_free(ctx); @@ -1275,15 +1334,15 @@ static int tls_decrypt_ticket(SSL *s, const unsigned char *etick, sess->session_id_length = sesslen; *psess = sess; if (renew_ticket) - return 4; + return TICKET_SUCCESS_RENEW; else - return 3; + return TICKET_SUCCESS; } ERR_clear_error(); /* * For session parse failure, indicate that we need to send a new ticket. */ - return 2; + return TICKET_NO_DECRYPT; err: EVP_CIPHER_CTX_free(ctx); HMAC_CTX_free(hctx); @@ -1293,9 +1352,9 @@ static int tls_decrypt_ticket(SSL *s, const unsigned char *etick, int tls12_get_sigandhash(SSL *s, WPACKET *pkt, const EVP_PKEY *pk, const EVP_MD *md, int *ispss) { - int md_id, sig_id, tmpispss = 0; + int md_id, sig_id; size_t i; - SIGALG_LOOKUP *curr; + const SIGALG_LOOKUP *curr; if (md == NULL) return 0; @@ -1303,86 +1362,57 @@ int tls12_get_sigandhash(SSL *s, WPACKET *pkt, const EVP_PKEY *pk, sig_id = EVP_PKEY_id(pk); if (md_id == NID_undef) return 0; + /* For TLS 1.3 only allow RSA-PSS */ + if (SSL_IS_TLS13(s) && sig_id == EVP_PKEY_RSA) + sig_id = EVP_PKEY_RSA_PSS; - for (i = 0, curr = sigalg_lookup_tbl; i < OSSL_NELEM(sigalg_lookup_tbl); - i++, curr++) { - if (curr->hash == md_id && curr->sig == sig_id) { - if (sig_id == EVP_PKEY_RSA) { - tmpispss = SIGID_IS_PSS(curr->sigalg); - if (!SSL_IS_TLS13(s) && tmpispss) { - size_t j; - - /* - * Check peer actually sent a PSS sig id - it could have - * been a PKCS1 sig id instead. - */ - for (j = 0; j < s->cert->shared_sigalgslen; j++) - if (s->cert->shared_sigalgs[j].rsigalg == curr->sigalg) - break; - - if (j == s->cert->shared_sigalgslen) - continue; - } + if (s->s3->tmp.peer_sigalgs == NULL) { + /* Should never happen: we abort if no sigalgs extension and TLS 1.3 */ + if (SSL_IS_TLS13(s)) + return 0; + /* For TLS 1.2 and no sigalgs lookup using complete table */ + for (i = 0, curr = sigalg_lookup_tbl; i < OSSL_NELEM(sigalg_lookup_tbl); + i++, curr++) { + if (curr->hash == md_id && curr->sig == sig_id) { + if (!WPACKET_put_bytes_u16(pkt, curr->sigalg)) + return 0; + *ispss = curr->sig == EVP_PKEY_RSA_PSS; + return 1; } + } + return 0; + } + + for (i = 0; i < s->cert->shared_sigalgslen; i++) { + curr = s->cert->shared_sigalgs[i]; + + /* + * Look for matching key and hash. If key type is RSA also match PSS + * signature type. + */ + if (curr->hash == md_id && (curr->sig == sig_id + || (sig_id == EVP_PKEY_RSA && curr->sig == EVP_PKEY_RSA_PSS))){ if (!WPACKET_put_bytes_u16(pkt, curr->sigalg)) return 0; - *ispss = tmpispss; + *ispss = curr->sig == EVP_PKEY_RSA_PSS; return 1; } } - return 0; } -typedef struct { - int nid; - int secbits; - int md_idx; -} tls12_hash_info; - -static const tls12_hash_info tls12_md_info[] = { - {NID_md5, 64, SSL_MD_MD5_IDX}, - {NID_sha1, 80, SSL_MD_SHA1_IDX}, - {NID_sha224, 112, SSL_MD_SHA224_IDX}, - {NID_sha256, 128, SSL_MD_SHA256_IDX}, - {NID_sha384, 192, SSL_MD_SHA384_IDX}, - {NID_sha512, 256, SSL_MD_SHA512_IDX}, - {NID_id_GostR3411_94, 128, SSL_MD_GOST94_IDX}, - {NID_id_GostR3411_2012_256, 128, SSL_MD_GOST12_256_IDX}, - {NID_id_GostR3411_2012_512, 256, SSL_MD_GOST12_512_IDX}, -}; - -static const tls12_hash_info *tls12_get_hash_info(int hash_nid) -{ - unsigned int i; - if (hash_nid == NID_undef) - return NULL; - - for (i = 0; i < OSSL_NELEM(tls12_md_info); i++) { - if (tls12_md_info[i].nid == hash_nid) - return tls12_md_info + i; - } - - return NULL; -} - -const EVP_MD *tls12_get_hash(int hash_nid) -{ - const tls12_hash_info *inf; - if (hash_nid == NID_md5 && FIPS_mode()) - return NULL; - inf = tls12_get_hash_info(hash_nid); - if (!inf) - return NULL; - return ssl_md(inf->md_idx); -} - static int tls12_get_pkey_idx(int sig_nid) { switch (sig_nid) { #ifndef OPENSSL_NO_RSA case EVP_PKEY_RSA: - return SSL_PKEY_RSA_SIGN; + return SSL_PKEY_RSA; + /* + * For now return RSA key for PSS. When we support PSS only keys + * this will need to be updated. + */ + case EVP_PKEY_RSA_PSS: + return SSL_PKEY_RSA; #endif #ifndef OPENSSL_NO_DSA case EVP_PKEY_DSA: @@ -1406,47 +1436,25 @@ static int tls12_get_pkey_idx(int sig_nid) return -1; } -/* Convert TLS 1.2 signature algorithm extension values into NIDs */ -static void tls1_lookup_sigalg(int *phash_nid, int *psign_nid, - int *psignhash_nid, unsigned int data) -{ - int sign_nid = NID_undef, hash_nid = NID_undef; - if (!phash_nid && !psign_nid && !psignhash_nid) - return; - if (phash_nid || psignhash_nid) { - hash_nid = tls_sigalg_get_hash(data); - if (phash_nid) - *phash_nid = hash_nid; - } - if (psign_nid || psignhash_nid) { - sign_nid = tls_sigalg_get_sig(data); - if (psign_nid) - *psign_nid = sign_nid; - } - if (psignhash_nid) { - if (sign_nid == NID_undef || hash_nid == NID_undef - || OBJ_find_sigid_by_algs(psignhash_nid, hash_nid, sign_nid) <= 0) - *psignhash_nid = NID_undef; - } -} - /* Check to see if a signature algorithm is allowed */ -static int tls12_sigalg_allowed(SSL *s, int op, unsigned int ptmp) +static int tls12_sigalg_allowed(SSL *s, int op, uint16_t ptmp) { - /* See if we have an entry in the hash table and it is enabled */ - const tls12_hash_info *hinf - = tls12_get_hash_info(tls_sigalg_get_hash(ptmp)); + const SIGALG_LOOKUP *lu = tls1_lookup_sigalg(ptmp); unsigned char sigalgstr[2]; + int secbits; - if (hinf == NULL || ssl_md(hinf->md_idx) == NULL) + /* See if sigalgs is recognised and if hash is enabled */ + if (lu == NULL || ssl_md(lu->hash_idx) == NULL) return 0; /* See if public key algorithm allowed */ - if (tls12_get_pkey_idx(tls_sigalg_get_sig(ptmp)) == -1) + if (tls12_get_pkey_idx(lu->sig) == -1) return 0; + /* Security bits: half digest bits */ + secbits = EVP_MD_size(ssl_md(lu->hash_idx)) * 4; /* Finally see if security callback allows it */ sigalgstr[0] = (ptmp >> 8) & 0xff; sigalgstr[1] = ptmp & 0xff; - return ssl_security(s, op, hinf->secbits, hinf->nid, (void *)sigalgstr); + return ssl_security(s, op, secbits, lu->hash, (void *)sigalgstr); } /* @@ -1457,7 +1465,7 @@ static int tls12_sigalg_allowed(SSL *s, int op, unsigned int ptmp) void ssl_set_sig_mask(uint32_t *pmask_a, SSL *s, int op) { - const unsigned int *sigalgs; + const uint16_t *sigalgs; size_t i, sigalgslen; int have_rsa = 0, have_dsa = 0, have_ecdsa = 0; /* @@ -1465,10 +1473,12 @@ void ssl_set_sig_mask(uint32_t *pmask_a, SSL *s, int op) * RSA, DSA, ECDSA. Do this for all versions not just TLS 1.2. To keep * down calls to security callback only check if we have to. */ - sigalgslen = tls12_get_psigalgs(s, &sigalgs); + sigalgslen = tls12_get_psigalgs(s, 1, &sigalgs); for (i = 0; i < sigalgslen; i ++, sigalgs++) { switch (tls_sigalg_get_sig(*sigalgs)) { #ifndef OPENSSL_NO_RSA + /* Any RSA-PSS signature algorithms also mean we allow RSA */ + case EVP_PKEY_RSA_PSS: case EVP_PKEY_RSA: if (!have_rsa && tls12_sigalg_allowed(s, op, *sigalgs)) have_rsa = 1; @@ -1497,7 +1507,7 @@ void ssl_set_sig_mask(uint32_t *pmask_a, SSL *s, int op) } int tls12_copy_sigalgs(SSL *s, WPACKET *pkt, - const unsigned int *psig, size_t psiglen) + const uint16_t *psig, size_t psiglen) { size_t i; @@ -1511,11 +1521,11 @@ int tls12_copy_sigalgs(SSL *s, WPACKET *pkt, } /* Given preference and allowed sigalgs set shared sigalgs */ -static size_t tls12_shared_sigalgs(SSL *s, TLS_SIGALGS *shsig, - const unsigned int *pref, size_t preflen, - const unsigned int *allow, size_t allowlen) +static size_t tls12_shared_sigalgs(SSL *s, const SIGALG_LOOKUP **shsig, + const uint16_t *pref, size_t preflen, + const uint16_t *allow, size_t allowlen) { - const unsigned int *ptmp, *atmp; + const uint16_t *ptmp, *atmp; size_t i, j, nmatch = 0; for (i = 0, ptmp = pref; i < preflen; i++, ptmp++) { /* Skip disabled hashes or signature algorithms */ @@ -1525,10 +1535,7 @@ static size_t tls12_shared_sigalgs(SSL *s, TLS_SIGALGS *shsig, if (*ptmp == *atmp) { nmatch++; if (shsig) { - shsig->rsigalg = *ptmp; - tls1_lookup_sigalg(&shsig->hash_nid, - &shsig->sign_nid, - &shsig->signandhash_nid, *ptmp); + *shsig = tls1_lookup_sigalg(*ptmp); shsig++; } break; @@ -1541,10 +1548,10 @@ static size_t tls12_shared_sigalgs(SSL *s, TLS_SIGALGS *shsig, /* Set shared signature algorithms for SSL structures */ static int tls1_set_shared_sigalgs(SSL *s) { - const unsigned int *pref, *allow, *conf; + const uint16_t *pref, *allow, *conf; size_t preflen, allowlen, conflen; size_t nmatch; - TLS_SIGALGS *salgs = NULL; + const SIGALG_LOOKUP **salgs = NULL; CERT *c = s->cert; unsigned int is_suiteb = tls1_suiteb(s); @@ -1559,7 +1566,7 @@ static int tls1_set_shared_sigalgs(SSL *s) conf = c->conf_sigalgs; conflen = c->conf_sigalgslen; } else - conflen = tls12_get_psigalgs(s, &conf); + conflen = tls12_get_psigalgs(s, 0, &conf); if (s->options & SSL_OP_CIPHER_SERVER_PREFERENCE || is_suiteb) { pref = conf; preflen = conflen; @@ -1573,7 +1580,7 @@ static int tls1_set_shared_sigalgs(SSL *s) } nmatch = tls12_shared_sigalgs(s, NULL, pref, preflen, allow, allowlen); if (nmatch) { - salgs = OPENSSL_malloc(nmatch * sizeof(TLS_SIGALGS)); + salgs = OPENSSL_malloc(nmatch * sizeof(*salgs)); if (salgs == NULL) return 0; nmatch = tls12_shared_sigalgs(s, salgs, pref, preflen, allow, allowlen); @@ -1590,6 +1597,7 @@ static int tls1_set_shared_sigalgs(SSL *s) int tls1_save_sigalgs(SSL *s, PACKET *pkt) { CERT *c = s->cert; + unsigned int stmp; size_t size, i; /* Extension ignored for inappropriate versions */ @@ -1613,9 +1621,8 @@ int tls1_save_sigalgs(SSL *s, PACKET *pkt) if (s->s3->tmp.peer_sigalgs == NULL) return 0; s->s3->tmp.peer_sigalgslen = size; - for (i = 0; i < size && PACKET_get_net_2(pkt, &s->s3->tmp.peer_sigalgs[i]); - i++) - continue; + for (i = 0; i < size && PACKET_get_net_2(pkt, &stmp); i++) + s->s3->tmp.peer_sigalgs[i] = stmp; if (i != size) return 0; @@ -1631,30 +1638,22 @@ int tls1_process_sigalgs(SSL *s) const EVP_MD **pmd = s->s3->tmp.md; uint32_t *pvalid = s->s3->tmp.valid_flags; CERT *c = s->cert; - TLS_SIGALGS *sigptr; + if (!tls1_set_shared_sigalgs(s)) return 0; - for (i = 0, sigptr = c->shared_sigalgs; - i < c->shared_sigalgslen; i++, sigptr++) { + for (i = 0; i < c->shared_sigalgslen; i++) { + const SIGALG_LOOKUP *sigptr = c->shared_sigalgs[i]; + /* Ignore PKCS1 based sig algs in TLSv1.3 */ - if (SSL_IS_TLS13(s) - && (sigptr->rsigalg == TLSEXT_SIGALG_rsa_pkcs1_sha1 - || sigptr->rsigalg == TLSEXT_SIGALG_rsa_pkcs1_sha256 - || sigptr->rsigalg == TLSEXT_SIGALG_rsa_pkcs1_sha384 - || sigptr->rsigalg == TLSEXT_SIGALG_rsa_pkcs1_sha512)) + if (SSL_IS_TLS13(s) && sigptr->sig == EVP_PKEY_RSA) continue; - idx = tls12_get_pkey_idx(sigptr->sign_nid); - if (idx > 0 && pmd[idx] == NULL) { - md = tls12_get_hash(sigptr->hash_nid); + idx = tls12_get_pkey_idx(sigptr->sig); + if (idx >= 0 && pmd[idx] == NULL) { + md = ssl_md(sigptr->hash_idx); pmd[idx] = md; pvalid[idx] = CERT_PKEY_EXPLICIT_SIGN; - if (idx == SSL_PKEY_RSA_SIGN) { - pvalid[SSL_PKEY_RSA_ENC] = CERT_PKEY_EXPLICIT_SIGN; - pmd[SSL_PKEY_RSA_ENC] = md; - } } - } /* * In strict mode or TLS1.3 leave unset digests as NULL to indicate we can't @@ -1671,9 +1670,8 @@ int tls1_process_sigalgs(SSL *s) pmd[SSL_PKEY_DSA_SIGN] = EVP_sha1(); #endif #ifndef OPENSSL_NO_RSA - if (pmd[SSL_PKEY_RSA_SIGN] == NULL) { - pmd[SSL_PKEY_RSA_SIGN] = EVP_sha1(); - pmd[SSL_PKEY_RSA_ENC] = EVP_sha1(); + if (pmd[SSL_PKEY_RSA] == NULL) { + pmd[SSL_PKEY_RSA] = EVP_sha1(); } #endif #ifndef OPENSSL_NO_EC @@ -1698,19 +1696,27 @@ int SSL_get_sigalgs(SSL *s, int idx, int *psign, int *phash, int *psignhash, unsigned char *rsig, unsigned char *rhash) { - unsigned int *psig = s->s3->tmp.peer_sigalgs; + uint16_t *psig = s->s3->tmp.peer_sigalgs; size_t numsigalgs = s->s3->tmp.peer_sigalgslen; if (psig == NULL || numsigalgs > INT_MAX) return 0; if (idx >= 0) { + const SIGALG_LOOKUP *lu; + if (idx >= (int)numsigalgs) return 0; psig += idx; - if (rhash) + if (rhash != NULL) *rhash = (unsigned char)((*psig >> 8) & 0xff); - if (rsig) + if (rsig != NULL) *rsig = (unsigned char)(*psig & 0xff); - tls1_lookup_sigalg(phash, psign, psignhash, *psig); + lu = tls1_lookup_sigalg(*psig); + if (psign != NULL) + *psign = lu != NULL ? lu->sig : NID_undef; + if (phash != NULL) + *phash = lu != NULL ? lu->hash : NID_undef; + if (psignhash != NULL) + *psignhash = lu != NULL ? lu->sigandhash : NID_undef; } return (int)numsigalgs; } @@ -1719,35 +1725,40 @@ int SSL_get_shared_sigalgs(SSL *s, int idx, int *psign, int *phash, int *psignhash, unsigned char *rsig, unsigned char *rhash) { - TLS_SIGALGS *shsigalgs = s->cert->shared_sigalgs; - if (!shsigalgs || idx >= (int)s->cert->shared_sigalgslen - || s->cert->shared_sigalgslen > INT_MAX) + const SIGALG_LOOKUP *shsigalgs; + if (s->cert->shared_sigalgs == NULL + || idx < 0 + || idx >= (int)s->cert->shared_sigalgslen + || s->cert->shared_sigalgslen > INT_MAX) return 0; - shsigalgs += idx; - if (phash) - *phash = shsigalgs->hash_nid; - if (psign) - *psign = shsigalgs->sign_nid; - if (psignhash) - *psignhash = shsigalgs->signandhash_nid; - if (rsig) - *rsig = (unsigned char)(shsigalgs->rsigalg & 0xff); - if (rhash) - *rhash = (unsigned char)((shsigalgs->rsigalg >> 8) & 0xff); + shsigalgs = s->cert->shared_sigalgs[idx]; + if (phash != NULL) + *phash = shsigalgs->hash; + if (psign != NULL) + *psign = shsigalgs->sig; + if (psignhash != NULL) + *psignhash = shsigalgs->sigandhash; + if (rsig != NULL) + *rsig = (unsigned char)(shsigalgs->sigalg & 0xff); + if (rhash != NULL) + *rhash = (unsigned char)((shsigalgs->sigalg >> 8) & 0xff); return (int)s->cert->shared_sigalgslen; } -#define MAX_SIGALGLEN (TLSEXT_hash_num * TLSEXT_signature_num * 2) +/* Maximum possible number of unique entries in sigalgs array */ +#define TLS_MAX_SIGALGCNT (OSSL_NELEM(sigalg_lookup_tbl) * 2) typedef struct { size_t sigalgcnt; - int sigalgs[MAX_SIGALGLEN]; + int sigalgs[TLS_MAX_SIGALGCNT]; } sig_cb_st; static void get_sigorhash(int *psig, int *phash, const char *str) { if (strcmp(str, "RSA") == 0) { *psig = EVP_PKEY_RSA; + } else if (strcmp(str, "RSA-PSS") == 0 || strcmp(str, "PSS") == 0) { + *psig = EVP_PKEY_RSA_PSS; } else if (strcmp(str, "DSA") == 0) { *psig = EVP_PKEY_DSA; } else if (strcmp(str, "ECDSA") == 0) { @@ -1758,31 +1769,44 @@ static void get_sigorhash(int *psig, int *phash, const char *str) *phash = OBJ_ln2nid(str); } } +/* Maximum length of a signature algorithm string component */ +#define TLS_MAX_SIGSTRING_LEN 40 static int sig_cb(const char *elem, int len, void *arg) { sig_cb_st *sarg = arg; size_t i; - char etmp[20], *p; + char etmp[TLS_MAX_SIGSTRING_LEN], *p; int sig_alg = NID_undef, hash_alg = NID_undef; if (elem == NULL) return 0; - if (sarg->sigalgcnt == MAX_SIGALGLEN) + if (sarg->sigalgcnt == TLS_MAX_SIGALGCNT) return 0; if (len > (int)(sizeof(etmp) - 1)) return 0; memcpy(etmp, elem, len); etmp[len] = 0; p = strchr(etmp, '+'); - if (!p) - return 0; - *p = 0; - p++; - if (!*p) - return 0; - - get_sigorhash(&sig_alg, &hash_alg, etmp); - get_sigorhash(&sig_alg, &hash_alg, p); + /* See if we have a match for TLS 1.3 names */ + if (p == NULL) { + const SIGALG_LOOKUP *s; + + for (i = 0, s = sigalg_lookup_tbl; i < OSSL_NELEM(sigalg_lookup_tbl); + i++, s++) { + if (s->name != NULL && strcmp(etmp, s->name) == 0) { + sig_alg = s->sig; + hash_alg = s->hash; + break; + } + } + } else { + *p = 0; + p++; + if (*p == 0) + return 0; + get_sigorhash(&sig_alg, &hash_alg, etmp); + get_sigorhash(&sig_alg, &hash_alg, p); + } if (sig_alg == NID_undef || hash_alg == NID_undef) return 0; @@ -1811,32 +1835,24 @@ int tls1_set_sigalgs_list(CERT *c, const char *str, int client) return tls1_set_sigalgs(c, sig.sigalgs, sig.sigalgcnt, client); } -/* TODO(TLS1.3): Needs updating to allow setting of TLS1.3 sig algs */ int tls1_set_sigalgs(CERT *c, const int *psig_nids, size_t salglen, int client) { - unsigned int *sigalgs, *sptr; + uint16_t *sigalgs, *sptr; size_t i; if (salglen & 1) return 0; - sigalgs = OPENSSL_malloc(salglen * sizeof(*sigalgs)); + sigalgs = OPENSSL_malloc((salglen / 2) * sizeof(*sigalgs)); if (sigalgs == NULL) return 0; - /* - * TODO(TLS1.3): Somehow we need to be able to set RSA-PSS as well as - * RSA-PKCS1. For now we only allow setting of RSA-PKCS1 - */ for (i = 0, sptr = sigalgs; i < salglen; i += 2) { size_t j; - SIGALG_LOOKUP *curr; + const SIGALG_LOOKUP *curr; int md_id = *psig_nids++; int sig_id = *psig_nids++; for (j = 0, curr = sigalg_lookup_tbl; j < OSSL_NELEM(sigalg_lookup_tbl); j++, curr++) { - /* Skip setting PSS so we get PKCS1 by default */ - if (SIGID_IS_PSS(curr->sigalg)) - continue; if (curr->hash == md_id && curr->sig == sig_id) { *sptr++ = curr->sigalg; break; @@ -1850,11 +1866,11 @@ int tls1_set_sigalgs(CERT *c, const int *psig_nids, size_t salglen, int client) if (client) { OPENSSL_free(c->client_sigalgs); c->client_sigalgs = sigalgs; - c->client_sigalgslen = salglen; + c->client_sigalgslen = salglen / 2; } else { OPENSSL_free(c->conf_sigalgs); c->conf_sigalgs = sigalgs; - c->conf_sigalgslen = salglen; + c->conf_sigalgslen = salglen / 2; } return 1; @@ -1874,7 +1890,7 @@ static int tls1_check_sig_alg(CERT *c, X509 *x, int default_nid) if (default_nid) return sig_nid == default_nid ? 1 : 0; for (i = 0; i < c->shared_sigalgslen; i++) - if (sig_nid == c->shared_sigalgs[i].signandhash_nid) + if (sig_nid == c->shared_sigalgs[i]->sigandhash) return 1; return 0; } @@ -1972,8 +1988,7 @@ int tls1_check_chain(SSL *s, X509 *x, EVP_PKEY *pk, STACK_OF(X509) *chain, /* If no sigalgs extension use defaults from RFC5246 */ else { switch (idx) { - case SSL_PKEY_RSA_ENC: - case SSL_PKEY_RSA_SIGN: + case SSL_PKEY_RSA: rsign = EVP_PKEY_RSA; default_nid = NID_sha1WithRSAEncryption; break; @@ -2014,10 +2029,11 @@ int tls1_check_chain(SSL *s, X509 *x, EVP_PKEY *pk, STACK_OF(X509) *chain, */ if (default_nid > 0 && c->conf_sigalgs) { size_t j; - const unsigned int *p = c->conf_sigalgs; + const uint16_t *p = c->conf_sigalgs; for (j = 0; j < c->conf_sigalgslen; j++, p++) { - if (tls_sigalg_get_hash(*p) == NID_sha1 - && tls_sigalg_get_sig(*p) == rsign) + const SIGALG_LOOKUP *lu = tls1_lookup_sigalg(*p); + + if (lu != NULL && lu->hash == NID_sha1 && lu->sig == rsign) break; } if (j == c->conf_sigalgslen) { @@ -2159,8 +2175,7 @@ int tls1_check_chain(SSL *s, X509 *x, EVP_PKEY *pk, STACK_OF(X509) *chain, /* Set validity of certificates in an SSL structure */ void tls1_set_cert_validity(SSL *s) { - tls1_check_chain(s, NULL, NULL, NULL, SSL_PKEY_RSA_ENC); - tls1_check_chain(s, NULL, NULL, NULL, SSL_PKEY_RSA_SIGN); + tls1_check_chain(s, NULL, NULL, NULL, SSL_PKEY_RSA); tls1_check_chain(s, NULL, NULL, NULL, SSL_PKEY_DSA_SIGN); tls1_check_chain(s, NULL, NULL, NULL, SSL_PKEY_ECC); tls1_check_chain(s, NULL, NULL, NULL, SSL_PKEY_GOST01); @@ -2186,8 +2201,9 @@ DH *ssl_get_auto_dh(SSL *s) else dh_secbits = 80; } else { - CERT_PKEY *cpk = ssl_get_server_send_pkey(s); - dh_secbits = EVP_PKEY_security_bits(cpk->privatekey); + if (s->s3->tmp.cert == NULL) + return NULL; + dh_secbits = EVP_PKEY_security_bits(s->s3->tmp.cert->privatekey); } if (dh_secbits >= 128) { @@ -2297,3 +2313,173 @@ int ssl_security_cert_chain(SSL *s, STACK_OF(X509) *sk, X509 *x, int vfy) } return 1; } + +/* + * Choose an appropriate signature algorithm based on available certificates + * Sets chosen certificate and signature algorithm. + * + * For servers if we fail to find a required certificate it is a fatal error + * and an appropriate error code is set and the TLS alert set in *al. + * + * For clients al is set to NULL. If a certificate is not suitable it is not + * a fatal error: we will either try another certificate or not present one + * to the server. In this case no error is set. + */ +int tls_choose_sigalg(SSL *s, int *al) +{ + int idx = -1; + const SIGALG_LOOKUP *lu = NULL; + + s->s3->tmp.cert = NULL; + s->s3->tmp.sigalg = NULL; + + if (SSL_IS_TLS13(s)) { + size_t i; +#ifndef OPENSSL_NO_EC + int curve = -1; +#endif + + /* Look for a certificate matching shared sigaglgs */ + for (i = 0; i < s->cert->shared_sigalgslen; i++) { + lu = s->cert->shared_sigalgs[i]; + + /* Skip RSA if not PSS */ + if (lu->sig == EVP_PKEY_RSA) + continue; + if (ssl_md(lu->hash_idx) == NULL) + continue; + idx = lu->sig_idx; + if (!ssl_has_cert(s, idx)) + continue; + if (lu->sig == EVP_PKEY_EC) { +#ifndef OPENSSL_NO_EC + if (curve == -1) { + EC_KEY *ec = EVP_PKEY_get0_EC_KEY(s->cert->pkeys[idx].privatekey); + + curve = EC_GROUP_get_curve_name(EC_KEY_get0_group(ec)); + } + if (lu->curve != NID_undef && curve != lu->curve) + continue; +#else + continue; +#endif + } + break; + } + if (i == s->cert->shared_sigalgslen) { + if (al == NULL) + return 1; + *al = SSL_AD_HANDSHAKE_FAILURE; + SSLerr(SSL_F_TLS_CHOOSE_SIGALG, + SSL_R_NO_SUITABLE_SIGNATURE_ALGORITHM); + return 0; + } + } else { + if (s->server) { + /* Find index corresponding to ciphersuite */ + idx = ssl_cipher_get_cert_index(s->s3->tmp.new_cipher); + /* If no certificate for ciphersuite return */ + if (idx == -1) + return 1; + if (idx == SSL_PKEY_GOST_EC) { + /* Work out which GOST certificate is avaiable */ + if (ssl_has_cert(s, SSL_PKEY_GOST12_512)) { + idx = SSL_PKEY_GOST12_512; + } else if (ssl_has_cert(s, SSL_PKEY_GOST12_256)) { + idx = SSL_PKEY_GOST12_256; + } else if (ssl_has_cert(s, SSL_PKEY_GOST01)) { + idx = SSL_PKEY_GOST01; + } else { + if (al == NULL) + return 1; + *al = SSL_AD_INTERNAL_ERROR; + SSLerr(SSL_F_TLS_CHOOSE_SIGALG, ERR_R_INTERNAL_ERROR); + return 0; + } + } else if (!ssl_has_cert(s, idx)) { + if (al == NULL) + return 1; + *al = SSL_AD_INTERNAL_ERROR; + SSLerr(SSL_F_TLS_CHOOSE_SIGALG, ERR_R_INTERNAL_ERROR); + return 0; + } + } else { + /* Find index for client certificate */ + idx = s->cert->key - s->cert->pkeys; + if (!ssl_has_cert(s, idx)) + return 1; + } + + if (SSL_USE_SIGALGS(s)) { + if (s->s3->tmp.peer_sigalgs != NULL) { + size_t i; + + /* + * Find highest preference signature algorithm matching + * cert type + */ + for (i = 0; i < s->cert->shared_sigalgslen; i++) { + lu = s->cert->shared_sigalgs[i]; + if (lu->sig_idx == idx) + break; + if (idx == SSL_PKEY_RSA && lu->sig == EVP_PKEY_RSA_PSS) + break; + } + if (i == s->cert->shared_sigalgslen) { + if (al == NULL) + return 1; + *al = SSL_AD_INTERNAL_ERROR; + SSLerr(SSL_F_TLS_CHOOSE_SIGALG, ERR_R_INTERNAL_ERROR); + return 0; + } + } else { + /* + * If we have no sigalg use defaults + */ + const uint16_t *sent_sigs; + size_t sent_sigslen, i; + + if ((lu = tls1_get_legacy_sigalg(s, idx)) == NULL) { + if (al == NULL) + return 1; + *al = SSL_AD_INTERNAL_ERROR; + SSLerr(SSL_F_TLS_CHOOSE_SIGALG, ERR_R_INTERNAL_ERROR); + return 0; + } + + /* Check signature matches a type we sent */ + sent_sigslen = tls12_get_psigalgs(s, 1, &sent_sigs); + for (i = 0; i < sent_sigslen; i++, sent_sigs++) { + if (lu->sigalg == *sent_sigs) + break; + } + if (i == sent_sigslen) { + if (al == NULL) + return 1; + SSLerr(SSL_F_TLS_CHOOSE_SIGALG, SSL_R_WRONG_SIGNATURE_TYPE); + *al = SSL_AD_HANDSHAKE_FAILURE; + return 0; + } + } + } else { + if ((lu = tls1_get_legacy_sigalg(s, idx)) == NULL) { + if (al == NULL) + return 1; + *al = SSL_AD_INTERNAL_ERROR; + SSLerr(SSL_F_TLS_CHOOSE_SIGALG, ERR_R_INTERNAL_ERROR); + return 0; + } + } + } + if (idx == -1) { + if (al != NULL) { + *al = SSL_AD_INTERNAL_ERROR; + SSLerr(SSL_F_TLS_CHOOSE_SIGALG, ERR_R_INTERNAL_ERROR); + } + return 0; + } + s->s3->tmp.cert = &s->cert->pkeys[idx]; + s->cert->key = s->s3->tmp.cert; + s->s3->tmp.sigalg = lu; + return 1; +}