diff options
Diffstat (limited to 'src/tls/tlsv1_server_read.c')
| -rw-r--r-- | src/tls/tlsv1_server_read.c | 80 |
1 files changed, 80 insertions, 0 deletions
diff --git a/src/tls/tlsv1_server_read.c b/src/tls/tlsv1_server_read.c index e727806..11116f1 100644 --- a/src/tls/tlsv1_server_read.c +++ b/src/tls/tlsv1_server_read.c @@ -842,6 +842,47 @@ static int tls_process_certificate_verify(struct tlsv1_server *conn, u8 ct, hpos = hash; +#ifdef CONFIG_TLSV12 + if (conn->rl.tls_version == TLS_VERSION_1_2) { + /* + * RFC 5246, 4.7: + * TLS v1.2 adds explicit indication of the used signature and + * hash algorithms. + * + * struct { + * HashAlgorithm hash; + * SignatureAlgorithm signature; + * } SignatureAndHashAlgorithm; + */ + if (end - pos < 2) { + tlsv1_server_alert(conn, TLS_ALERT_LEVEL_FATAL, + TLS_ALERT_DECODE_ERROR); + return -1; + } + if (pos[0] != TLS_HASH_ALG_SHA256 || + pos[1] != TLS_SIGN_ALG_RSA) { + wpa_printf(MSG_DEBUG, "TLSv1.2: Unsupported hash(%u)/" + "signature(%u) algorithm", + pos[0], pos[1]); + tlsv1_server_alert(conn, TLS_ALERT_LEVEL_FATAL, + TLS_ALERT_INTERNAL_ERROR); + return -1; + } + pos += 2; + + hlen = SHA256_MAC_LEN; + if (conn->verify.sha256_cert == NULL || + crypto_hash_finish(conn->verify.sha256_cert, hpos, &hlen) < + 0) { + conn->verify.sha256_cert = NULL; + tlsv1_server_alert(conn, TLS_ALERT_LEVEL_FATAL, + TLS_ALERT_INTERNAL_ERROR); + return -1; + } + conn->verify.sha256_cert = NULL; + } else { +#endif /* CONFIG_TLSV12 */ + if (alg == SIGN_ALG_RSA) { hlen = MD5_MAC_LEN; if (conn->verify.md5_cert == NULL || @@ -872,6 +913,10 @@ static int tls_process_certificate_verify(struct tlsv1_server *conn, u8 ct, if (alg == SIGN_ALG_RSA) hlen += MD5_MAC_LEN; +#ifdef CONFIG_TLSV12 + } +#endif /* CONFIG_TLSV12 */ + wpa_hexdump(MSG_MSGDUMP, "TLSv1: CertificateVerify hash", hash, hlen); if (end - pos < 2) { @@ -911,6 +956,41 @@ static int tls_process_certificate_verify(struct tlsv1_server *conn, u8 ct, wpa_hexdump_key(MSG_MSGDUMP, "TLSv1: Decrypted Signature", buf, buflen); +#ifdef CONFIG_TLSV12 + if (conn->rl.tls_version >= TLS_VERSION_1_2) { + /* + * RFC 3447, A.2.4 RSASSA-PKCS1-v1_5 + * + * DigestInfo ::= SEQUENCE { + * digestAlgorithm DigestAlgorithm, + * digest OCTET STRING + * } + * + * SHA-256 OID: sha256WithRSAEncryption ::= {pkcs-1 11} + * + * DER encoded DigestInfo for SHA256 per RFC 3447: + * 30 31 30 0d 06 09 60 86 48 01 65 03 04 02 01 05 00 04 20 || + * H + */ + if (buflen >= 19 + 32 && + os_memcmp(buf, "\x30\x31\x30\x0d\x06\x09\x60\x86\x48\x01" + "\x65\x03\x04\x02\x01\x05\x00\x04\x20", 19) == 0) + { + wpa_printf(MSG_DEBUG, "TLSv1.2: DigestAlgorithn = " + "SHA-256"); + os_memmove(buf, buf + 19, buflen - 19); + buflen -= 19; + } else { + wpa_printf(MSG_DEBUG, "TLSv1.2: Unrecognized " + "DigestInfo"); + os_free(buf); + tlsv1_server_alert(conn, TLS_ALERT_LEVEL_FATAL, + TLS_ALERT_DECRYPT_ERROR); + return -1; + } + } +#endif /* CONFIG_TLSV12 */ + if (buflen != hlen || os_memcmp(buf, hash, buflen) != 0) { wpa_printf(MSG_DEBUG, "TLSv1: Invalid Signature in " "CertificateVerify - did not match with calculated " |