path: root/epan/dissectors/packet-ssl-utils.c

/* packet-ssl-utils.c
 * ssl manipulation functions
 * By Paolo Abeni <paolo.abeni@email.com>
 *
 * $Id$
 *
 * Wireshark - Network traffic analyzer
 * By Gerald Combs <gerald@wireshark.org>
 * Copyright 1998 Gerald Combs
 *
 * This program is free software; you can redistribute it and/or
 * modify it under the terms of the GNU General Public License
 * as published by the Free Software Foundation; either version 2
 * of the License, or (at your option) any later version.
 *
 * This program is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 * GNU General Public License for more details.
 *
 * You should have received a copy of the GNU General Public License
 * along with this program; if not, write to the Free Software
 * Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA  02111-1307, USA.
 */

#ifdef HAVE_CONFIG_H
# include "config.h"
#endif

#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#ifdef HAVE_LIBZ
#include <zlib.h>
#endif
#include "packet-ssl-utils.h"

#include <epan/emem.h>
#include <epan/strutil.h>
#include <wiretap/file_util.h>

/*
 * Lookup tables
 *
 */
const value_string ssl_20_msg_types[] = {
    { SSL2_HND_ERROR,               "Error" },
    { SSL2_HND_CLIENT_HELLO,        "Client Hello" },
    { SSL2_HND_CLIENT_MASTER_KEY,   "Client Master Key" },
    { SSL2_HND_CLIENT_FINISHED,     "Client Finished" },
    { SSL2_HND_SERVER_HELLO,        "Server Hello" },
    { SSL2_HND_SERVER_VERIFY,       "Server Verify" },
    { SSL2_HND_SERVER_FINISHED,     "Server Finished" },
    { SSL2_HND_REQUEST_CERTIFICATE, "Request Certificate" },
    { SSL2_HND_CLIENT_CERTIFICATE,  "Client Certificate" },
    { 0x00, NULL }
};

const value_string ssl_20_cipher_suites[] = {
    { 0x010080, "SSL2_RC4_128_WITH_MD5" },
    { 0x020080, "SSL2_RC4_128_EXPORT40_WITH_MD5" },
    { 0x030080, "SSL2_RC2_CBC_128_CBC_WITH_MD5" },
    { 0x040080, "SSL2_RC2_CBC_128_CBC_WITH_MD5" },
    { 0x050080, "SSL2_IDEA_128_CBC_WITH_MD5" },
    { 0x060040, "SSL2_DES_64_CBC_WITH_MD5" },
    { 0x0700c0, "SSL2_DES_192_EDE3_CBC_WITH_MD5" },
    { 0x080080, "SSL2_RC4_64_WITH_MD5" },
    { 0x000000, "TLS_NULL_WITH_NULL_NULL" },
    { 0x000001, "TLS_RSA_WITH_NULL_MD5" },
    { 0x000002, "TLS_RSA_WITH_NULL_SHA" },
    { 0x000003, "TLS_RSA_EXPORT_WITH_RC4_40_MD5" },
    { 0x000004, "TLS_RSA_WITH_RC4_128_MD5" },
    { 0x000005, "TLS_RSA_WITH_RC4_128_SHA" },
    { 0x000006, "TLS_RSA_EXPORT_WITH_RC2_CBC_40_MD5" },
    { 0x000007, "TLS_RSA_WITH_IDEA_CBC_SHA" },
    { 0x000008, "TLS_RSA_EXPORT_WITH_DES40_CBC_SHA" },
    { 0x000009, "TLS_RSA_WITH_DES_CBC_SHA" },
    { 0x00000a, "TLS_RSA_WITH_3DES_EDE_CBC_SHA" },
    { 0x00000b, "TLS_DH_DSS_EXPORT_WITH_DES40_CBC_SHA" },
    { 0x00000c, "TLS_DH_DSS_WITH_DES_CBC_SHA" },
    { 0x00000d, "TLS_DH_DSS_WITH_3DES_EDE_CBC_SHA" },
    { 0x00000e, "TLS_DH_RSA_EXPORT_WITH_DES40_CBC_SHA" },
    { 0x00000f, "TLS_DH_RSA_WITH_DES_CBC_SHA" },
    { 0x000010, "TLS_DH_RSA_WITH_3DES_EDE_CBC_SHA" },
    { 0x000011, "TLS_DHE_DSS_EXPORT_WITH_DES40_CBC_SHA" },
    { 0x000012, "TLS_DHE_DSS_WITH_DES_CBC_SHA" },
    { 0x000013, "TLS_DHE_DSS_WITH_3DES_EDE_CBC_SHA" },
    { 0x000014, "TLS_DHE_RSA_EXPORT_WITH_DES40_CBC_SHA" },
    { 0x000015, "TLS_DHE_RSA_WITH_DES_CBC_SHA" },
    { 0x000016, "TLS_DHE_RSA_WITH_3DES_EDE_CBC_SHA" },
    { 0x000017, "TLS_DH_anon_EXPORT_WITH_RC4_40_MD5" },
    { 0x000018, "TLS_DH_anon_WITH_RC4_128_MD5" },
    { 0x000019, "TLS_DH_anon_EXPORT_WITH_DES40_CBC_SHA" },
    { 0x00001a, "TLS_DH_anon_WITH_DES_CBC_SHA" },
    { 0x00001b, "TLS_DH_anon_WITH_3DES_EDE_CBC_SHA" },
    { 0x00001c, "SSL_FORTEZZA_KEA_WITH_NULL_SHA" },
    { 0x00001d, "SSL_FORTEZZA_KEA_WITH_FORTEZZA_CBC_SHA" },
    { 0x00001e, "SSL_FORTEZZA_KEA_WITH_RC4_128_SHA" },
    { 0x00002f, "TLS_RSA_WITH_AES_128_CBC_SHA" },
    { 0x000030, "TLS_DH_DSS_WITH_AES_128_CBC_SHA" },
    { 0x000031, "TLS_DH_RSA_WITH_AES_128_CBC_SHA" },
    { 0x000032, "TLS_DHE_DSS_WITH_AES_128_CBC_SHA" },
    { 0x000033, "TLS_DHE_RSA_WITH_AES_128_CBC_SHA" },
    { 0x000034, "TLS_DH_anon_WITH_AES_128_CBC_SHA" },
    { 0x000035, "TLS_RSA_WITH_AES_256_CBC_SHA" },
    { 0x000036, "TLS_DH_DSS_WITH_AES_256_CBC_SHA" },
    { 0x000037, "TLS_DH_RSA_WITH_AES_256_CBC_SHA" },
    { 0x000038, "TLS_DHE_DSS_WITH_AES_256_CBC_SHA" }, 
    { 0x000039, "TLS_DHE_RSA_WITH_AES_256_CBC_SHA" },
    { 0x00003A, "TLS_DH_anon_WITH_AES_256_CBC_SHA" },
    { 0x000041, "TLS_RSA_WITH_CAMELLIA_128_CBC_SHA" },
    { 0x000042, "TLS_DH_DSS_WITH_CAMELLIA_128_CBC_SHA" },
    { 0x000043, "TLS_DH_RSA_WITH_CAMELLIA_128_CBC_SHA" },
    { 0x000044, "TLS_DHE_DSS_WITH_CAMELLIA_128_CBC_SHA" },
    { 0x000045, "TLS_DHE_RSA_WITH_CAMELLIA_128_CBC_SHA" },
    { 0x000046, "TLS_DH_anon_WITH_CAMELLIA_128_CBC_SHA" },
    { 0x000047, "TLS_ECDH_ECDSA_WITH_NULL_SHA" },
    { 0x000048, "TLS_ECDH_ECDSA_WITH_RC4_128_SHA" },
    { 0x000049, "TLS_ECDH_ECDSA_WITH_DES_CBC_SHA" },
    { 0x00004A, "TLS_ECDH_ECDSA_WITH_3DES_EDE_CBC_SHA" },
    { 0x00004B, "TLS_ECDH_ECDSA_WITH_AES_128_CBC_SHA" },
    { 0x00004C, "TLS_ECDH_ECDSA_WITH_AES_256_CBC_SHA" },
    { 0x000060, "TLS_RSA_EXPORT1024_WITH_RC4_56_MD5" },
    { 0x000061, "TLS_RSA_EXPORT1024_WITH_RC2_CBC_56_MD5" },
    { 0x000062, "TLS_RSA_EXPORT1024_WITH_DES_CBC_SHA" },
    { 0x000063, "TLS_DHE_DSS_EXPORT1024_WITH_DES_CBC_SHA" },
    { 0x000064, "TLS_RSA_EXPORT1024_WITH_RC4_56_SHA" },
    { 0x000065, "TLS_DHE_DSS_EXPORT1024_WITH_RC4_56_SHA" },
    { 0x000066, "TLS_DHE_DSS_WITH_RC4_128_SHA" },
    { 0x000084, "TLS_RSA_WITH_CAMELLIA_256_CBC_SHA" },
    { 0x000085, "TLS_DH_DSS_WITH_CAMELLIA_256_CBC_SHA" },
    { 0x000086, "TLS_DH_RSA_WITH_CAMELLIA_256_CBC_SHA" },
    { 0x000087, "TLS_DHE_DSS_WITH_CAMELLIA_256_CBC_SHA" },
    { 0x000088, "TLS_DHE_RSA_WITH_CAMELLIA_256_CBC_SHA" },
    { 0x000089, "TLS_DH_anon_WITH_CAMELLIA_256_CBC_SHA" },
    /* these from http://www.mozilla.org/projects/
         security/pki/nss/ssl/fips-ssl-ciphersuites.html */
    { 0x00fefe, "SSL_RSA_FIPS_WITH_DES_CBC_SHA"},
    { 0x00feff, "SSL_RSA_FIPS_WITH_3DES_EDE_CBC_SHA" },
    { 0x00ffe0, "SSL_RSA_FIPS_WITH_3DES_EDE_CBC_SHA" },
    { 0x00ffe1, "SSL_RSA_FIPS_WITH_DES_CBC_SHA"},
    /* Microsoft's old PCT protocol. These are from Eric Rescorla's
       book "SSL and TLS" */
    { 0x8f8001, "PCT_SSL_COMPAT | PCT_VERSION_1" },
    { 0x800003, "PCT_SSL_CERT_TYPE | PCT1_CERT_X509_CHAIN" },
    { 0x800001, "PCT_SSL_CERT_TYPE | PCT1_CERT_X509" },
    { 0x810001, "PCT_SSL_HASH_TYPE | PCT1_HASH_MD5" },
    { 0x810003, "PCT_SSL_HASH_TYPE | PCT1_HASH_SHA" },
    { 0x820001, "PCT_SSL_EXCH_TYPE | PCT1_EXCH_RSA_PKCS1" },
    { 0x830004, "PCT_SSL_CIPHER_TYPE_1ST_HALF | PCT1_CIPHER_RC4" },
    { 0x848040, "PCT_SSL_CIPHER_TYPE_2ND_HALF | PCT1_ENC_BITS_128 | PCT1_MAC_BITS_128" },
    { 0x842840, "PCT_SSL_CIPHER_TYPE_2ND_HALF | PCT1_ENC_BITS_40 | PCT1_MAC_BITS_128" },
    /* note that ciphersuites of {0x00????} are TLS cipher suites in
     * a sslv2 client hello message; the ???? above is the two-byte
     * tls cipher suite id
     */
    { 0x00, NULL }
};

const value_string ssl_20_certificate_type[] = {
    { 0x00, "N/A" },
    { 0x01, "X.509 Certificate" },
    { 0x00, NULL }
};

const value_string ssl_31_content_type[] = {
    { 20, "Change Cipher Spec" },
    { 21, "Alert" },
    { 22, "Handshake" },
    { 23, "Application Data" },
    { 0x00, NULL }
};

const value_string ssl_versions[] = {
    { 0xfeff, "DTLS 1.0" },
    { 0x0100, "DTLS 1.0 (OpenSSL pre 0.9.8f)" },
    { 0x0302, "TLS 1.1" },
    { 0x0301, "TLS 1.0" },
    { 0x0300, "SSL 3.0" },
    { 0x0002, "SSL 2.0" },
    { 0x00, NULL }
};

#if 0
/* XXX - would be used if we dissected the body of a Change Cipher Spec
   message. */
const value_string ssl_31_change_cipher_spec[] = {
    { 1, "Change Cipher Spec" },
    { 0x00, NULL }
};
#endif

const value_string ssl_31_alert_level[] = {
    { 1, "Warning" },
    { 2, "Fatal" },
    { 0x00, NULL }
};

const value_string ssl_31_alert_description[] = {
    {  0,  "Close Notify" },
    { 10,  "Unexpected Message" },
    { 20,  "Bad Record MAC" },
    { 21,  "Decryption Failed" },
    { 22,  "Record Overflow" },
    { 30,  "Decompression Failure" },
    { 40,  "Handshake Failure" },
    { 42,  "Bad Certificate" },
    { 43,  "Unsupported Certificate" },
    { 44,  "Certificate Revoked" },
    { 45,  "Certificate Expired" },
    { 46,  "Certificate Unknown" },
    { 47,  "Illegal Parameter" },
    { 48,  "Unknown CA" },
    { 49,  "Access Denied" },
    { 50,  "Decode Error" },
    { 51,  "Decrypt Error" },
    { 60,  "Export Restriction" },
    { 70,  "Protocol Version" },
    { 71,  "Insufficient Security" },
    { 80,  "Internal Error" },
    { 90,  "User Canceled" },
    { 100, "No Renegotiation" },
    { 0x00, NULL }
};

const value_string ssl_31_handshake_type[] = {
    { SSL_HND_HELLO_REQUEST,     "Hello Request" },
    { SSL_HND_CLIENT_HELLO,      "Client Hello" },
    { SSL_HND_SERVER_HELLO,      "Server Hello" },
    { SSL_HND_HELLO_VERIFY_REQUEST, "Hello Verify Request"},
    { SSL_HND_CERTIFICATE,       "Certificate" },
    { SSL_HND_SERVER_KEY_EXCHG,  "Server Key Exchange" },
    { SSL_HND_CERT_REQUEST,      "Certificate Request" },
    { SSL_HND_SVR_HELLO_DONE,    "Server Hello Done" },
    { SSL_HND_CERT_VERIFY,       "Certificate Verify" },
    { SSL_HND_CLIENT_KEY_EXCHG,  "Client Key Exchange" },
    { SSL_HND_FINISHED,          "Finished" },
    { 0x00, NULL }
};

const value_string ssl_31_compression_method[] = {
    { 0, "null" },
    { 1, "DEFLATE" },
    { 64, "LZS" },
    { 0x00, NULL }
};

#if 0
/* XXX - would be used if we dissected a Signature, as would be
   seen in a server key exchange or certificate verify message. */
const value_string ssl_31_key_exchange_algorithm[] = {
    { 0, "RSA" },
    { 1, "Diffie Hellman" },
    { 0x00, NULL }
};

const value_string ssl_31_signature_algorithm[] = {
    { 0, "Anonymous" },
    { 1, "RSA" },
    { 2, "DSA" },
    { 0x00, NULL }
};
#endif

const value_string ssl_31_client_certificate_type[] = {
    { 1, "RSA Sign" },
    { 2, "DSS Sign" },
    { 3, "RSA Fixed DH" },
    { 4, "DSS Fixed DH" },
    { 0x00, NULL }
};

#if 0
/* XXX - would be used if we dissected exchange keys, as would be
   seen in a client key exchange message. */
const value_string ssl_31_public_value_encoding[] = {
    { 0, "Implicit" },
    { 1, "Explicit" },
    { 0x00, NULL }
};
#endif

const value_string ssl_31_ciphersuite[] = {
    /* RFC 2246, RFC 4346 */
    { 0x0000, "TLS_NULL_WITH_NULL_NULL" },
    { 0x0001, "TLS_RSA_WITH_NULL_MD5" },
    { 0x0002, "TLS_RSA_WITH_NULL_SHA" },
    { 0x0003, "TLS_RSA_EXPORT_WITH_RC4_40_MD5" },
    { 0x0004, "TLS_RSA_WITH_RC4_128_MD5" },
    { 0x0005, "TLS_RSA_WITH_RC4_128_SHA" },
    { 0x0006, "TLS_RSA_EXPORT_WITH_RC2_CBC_40_MD5" },
    { 0x0007, "TLS_RSA_WITH_IDEA_CBC_SHA" },
    { 0x0008, "TLS_RSA_EXPORT_WITH_DES40_CBC_SHA" },
    { 0x0009, "TLS_RSA_WITH_DES_CBC_SHA" },
    { 0x000a, "TLS_RSA_WITH_3DES_EDE_CBC_SHA" },
    { 0x000b, "TLS_DH_DSS_EXPORT_WITH_DES40_CBC_SHA" },
    { 0x000c, "TLS_DH_DSS_WITH_DES_CBC_SHA" },
    { 0x000d, "TLS_DH_DSS_WITH_3DES_EDE_CBC_SHA" },
    { 0x000e, "TLS_DH_RSA_EXPORT_WITH_DES40_CBC_SHA" },
    { 0x000f, "TLS_DH_RSA_WITH_DES_CBC_SHA" },
    { 0x0010, "TLS_DH_RSA_WITH_3DES_EDE_CBC_SHA" },
    { 0x0011, "TLS_DHE_DSS_EXPORT_WITH_DES40_CBC_SHA" },
    { 0x0012, "TLS_DHE_DSS_WITH_DES_CBC_SHA" },
    { 0x0013, "TLS_DHE_DSS_WITH_3DES_EDE_CBC_SHA" },
    { 0x0014, "TLS_DHE_RSA_EXPORT_WITH_DES40_CBC_SHA" },
    { 0x0015, "TLS_DHE_RSA_WITH_DES_CBC_SHA" },
    { 0x0016, "TLS_DHE_RSA_WITH_3DES_EDE_CBC_SHA" },
    { 0x0017, "TLS_DH_anon_EXPORT_WITH_RC4_40_MD5" },
    { 0x0018, "TLS_DH_anon_WITH_RC4_128_MD5" },
    { 0x0019, "TLS_DH_anon_EXPORT_WITH_DES40_CBC_SHA" },
    { 0x001a, "TLS_DH_anon_WITH_DES_CBC_SHA" },
    { 0x001b, "TLS_DH_anon_WITH_3DES_EDE_CBC_SHA" },

    { 0x001c, "SSL_FORTEZZA_KEA_WITH_NULL_SHA" },
    { 0x001d, "SSL_FORTEZZA_KEA_WITH_FORTEZZA_CBC_SHA" },
#if 0 /* Because it clashes with KRB5, is never used any more, and is safe
	 to remove according to David Hopwood <david.hopwood@zetnet.co.uk>
	 of the ietf-tls list */
    { 0x001e, "SSL_FORTEZZA_KEA_WITH_RC4_128_SHA" },
#endif

    /* RFC 2712 */
    { 0x001E, "TLS_KRB5_WITH_DES_CBC_SHA" },
    { 0x001F, "TLS_KRB5_WITH_3DES_EDE_CBC_SHA" },
    { 0x0020, "TLS_KRB5_WITH_RC4_128_SHA" },
    { 0x0021, "TLS_KRB5_WITH_IDEA_CBC_SHA" },
    { 0x0022, "TLS_KRB5_WITH_DES_CBC_MD5" },
    { 0x0023, "TLS_KRB5_WITH_3DES_EDE_CBC_MD5" },
    { 0x0024, "TLS_KRB5_WITH_RC4_128_MD5" },
    { 0x0025, "TLS_KRB5_WITH_IDEA_CBC_MD5" },
    { 0x0026, "TLS_KRB5_EXPORT_WITH_DES_CBC_40_SHA" },
    { 0x0027, "TLS_KRB5_EXPORT_WITH_RC2_CBC_40_SHA" },
    { 0x0028, "TLS_KRB5_EXPORT_WITH_RC4_40_SHA" },
    { 0x0029, "TLS_KRB5_EXPORT_WITH_DES_CBC_40_MD5" },
    { 0x002A, "TLS_KRB5_EXPORT_WITH_RC2_CBC_40_MD5" },
    { 0x002B, "TLS_KRB5_EXPORT_WITH_RC4_40_MD5" },

    /* RFC 4785 */
    { 0x002C, "TLS_PSK_WITH_NULL_SHA" },
    { 0x002D, "TLS_DHE_PSK_WITH_NULL_SHA" },
    { 0x002E, "TLS_RSA_PSK_WITH_NULL_SHA" },

    /* RFC 3268 */
    { 0x002F, "TLS_RSA_WITH_AES_128_CBC_SHA" },
    { 0x0030, "TLS_DH_DSS_WITH_AES_128_CBC_SHA" },
    { 0x0031, "TLS_DH_RSA_WITH_AES_128_CBC_SHA" },
    { 0x0032, "TLS_DHE_DSS_WITH_AES_128_CBC_SHA" },
    { 0x0033, "TLS_DHE_RSA_WITH_AES_128_CBC_SHA" },
    { 0x0034, "TLS_DH_anon_WITH_AES_128_CBC_SHA" },
    { 0x0035, "TLS_RSA_WITH_AES_256_CBC_SHA" },
    { 0x0036, "TLS_DH_DSS_WITH_AES_256_CBC_SHA" },
    { 0x0037, "TLS_DH_RSA_WITH_AES_256_CBC_SHA" },
    { 0x0038, "TLS_DHE_DSS_WITH_AES_256_CBC_SHA" },
    { 0x0039, "TLS_DHE_RSA_WITH_AES_256_CBC_SHA" },
    { 0x003A, "TLS_DH_anon_WITH_AES_256_CBC_SHA" },

    /* ??? */
    { 0x0060, "TLS_RSA_EXPORT1024_WITH_RC4_56_MD5" },
    { 0x0061, "TLS_RSA_EXPORT1024_WITH_RC2_CBC_56_MD5" },

    /* draft-ietf-tls-56-bit-ciphersuites-01.txt */
    { 0x0062, "TLS_RSA_EXPORT1024_WITH_DES_CBC_SHA" },
    { 0x0063, "TLS_DHE_DSS_EXPORT1024_WITH_DES_CBC_SHA" },
    { 0x0064, "TLS_RSA_EXPORT1024_WITH_RC4_56_SHA" },
    { 0x0065, "TLS_DHE_DSS_EXPORT1024_WITH_RC4_56_SHA" },
    { 0x0066, "TLS_DHE_DSS_WITH_RC4_128_SHA" },

    /* RFC 4132 */
    { 0x0041, "TLS_RSA_WITH_CAMELLIA_128_CBC_SHA" },
    { 0x0042, "TLS_DH_DSS_WITH_CAMELLIA_128_CBC_SHA" },
    { 0x0043, "TLS_DH_RSA_WITH_CAMELLIA_128_CBC_SHA" },
    { 0x0044, "TLS_DHE_DSS_WITH_CAMELLIA_128_CBC_SHA" },
    { 0x0045, "TLS_DHE_RSA_WITH_CAMELLIA_128_CBC_SHA" },
    { 0x0046, "TLS_DH_anon_WITH_CAMELLIA_128_CBC_SHA" },
    { 0x0084, "TLS_RSA_WITH_CAMELLIA_256_CBC_SHA" },
    { 0x0085, "TLS_DH_DSS_WITH_CAMELLIA_256_CBC_SHA" },
    { 0x0086, "TLS_DH_RSA_WITH_CAMELLIA_256_CBC_SHA" },
    { 0x0087, "TLS_DHE_DSS_WITH_CAMELLIA_256_CBC_SHA" },
    { 0x0088, "TLS_DHE_RSA_WITH_CAMELLIA_256_CBC_SHA" },
    { 0x0089, "TLS_DH_anon_WITH_CAMELLIA_256_CBC_SHA" },

    /* RFC 4279 */
    { 0x008A, "TLS_PSK_WITH_RC4_128_SHA" },
    { 0x008B, "TLS_PSK_WITH_3DES_EDE_CBC_SHA" },
    { 0x008C, "TLS_PSK_WITH_AES_128_CBC_SHA" },
    { 0x008D, "TLS_PSK_WITH_AES_256_CBC_SHA" },
    { 0x008E, "TLS_DHE_PSK_WITH_RC4_128_SHA" },
    { 0x008F, "TLS_DHE_PSK_WITH_3DES_EDE_CBC_SHA" },
    { 0x0090, "TLS_DHE_PSK_WITH_AES_128_CBC_SHA" },
    { 0x0091, "TLS_DHE_PSK_WITH_AES_256_CBC_SHA" },
    { 0x0092, "TLS_RSA_PSK_WITH_RC4_128_SHA" },
    { 0x0093, "TLS_RSA_PSK_WITH_3DES_EDE_CBC_SHA" },
    { 0x0094, "TLS_RSA_PSK_WITH_AES_128_CBC_SHA" },
    { 0x0095, "TLS_RSA_PSK_WITH_AES_256_CBC_SHA" },

    /* RFC 4162 */
    { 0x0096, "TLS_RSA_WITH_SEED_CBC_SHA" },
    { 0x0097, "TLS_DH_DSS_WITH_SEED_CBC_SHA" },
    { 0x0098, "TLS_DH_RSA_WITH_SEED_CBC_SHA" },
    { 0x0099, "TLS_DHE_DSS_WITH_SEED_CBC_SHA" },
    { 0x009A, "TLS_DHE_RSA_WITH_SEED_CBC_SHA" },
    { 0x009B, "TLS_DH_anon_WITH_SEED_CBC_SHA" },

    /* From RFC 4492 */
    { 0xc001, "TLS_ECDH_ECDSA_WITH_NULL_SHA" },
    { 0xc002, "TLS_ECDH_ECDSA_WITH_RC4_128_SHA" },
    { 0xc003, "TLS_ECDH_ECDSA_WITH_3DES_EDE_CBC_SHA" },
    { 0xc004, "TLS_ECDH_ECDSA_WITH_AES_128_CBC_SHA" },
    { 0xc005, "TLS_ECDH_ECDSA_WITH_AES_256_CBC_SHA" },
    { 0xc006, "TLS_ECDHE_ECDSA_WITH_NULL_SHA" },
    { 0xc007, "TLS_ECDHE_ECDSA_WITH_RC4_128_SHA" },
    { 0xc008, "TLS_ECDHE_ECDSA_WITH_3DES_EDE_CBC_SHA" },
    { 0xc009, "TLS_ECDHE_ECDSA_WITH_AES_128_CBC_SHA" },
    { 0xc00a, "TLS_ECDHE_ECDSA_WITH_AES_256_CBC_SHA" },
    { 0xc00b, "TLS_ECDH_RSA_WITH_NULL_SHA" },
    { 0xc00c, "TLS_ECDH_RSA_WITH_RC4_128_SHA" },
    { 0xc00d, "TLS_ECDH_RSA_WITH_3DES_EDE_CBC_SHA" },
    { 0xc00e, "TLS_ECDH_RSA_WITH_AES_128_CBC_SHA" },
    { 0xc00f, "TLS_ECDH_RSA_WITH_AES_256_CBC_SHA" },
    { 0xc010, "TLS_ECDHE_RSA_WITH_NULL_SHA" },
    { 0xc011, "TLS_ECDHE_RSA_WITH_RC4_128_SHA" },
    { 0xc012, "TLS_ECDHE_RSA_WITH_3DES_EDE_CBC_SHA" },
    { 0xc013, "TLS_ECDHE_RSA_WITH_AES_128_CBC_SHA" },
    { 0xc014, "TLS_ECDHE_RSA_WITH_AES_256_CBC_SHA" },
    { 0xc015, "TLS_ECDH_anon_WITH_NULL_SHA" },
    { 0xc016, "TLS_ECDH_anon_WITH_RC4_128_SHA" },
    { 0xc017, "TLS_ECDH_anon_WITH_3DES_EDE_CBC_SHA" },
    { 0xc018, "TLS_ECDH_anon_WITH_AES_128_CBC_SHA" },
    { 0xc019, "TLS_ECDH_anon_WITH_AES_256_CBC_SHA" },

    /* draft-ietf-tls-srp-14.txt */
    { 0xC01A, "TLS_SRP_SHA_WITH_3DES_EDE_CBC_SHA" },
    { 0xC01B, "TLS_SRP_SHA_RSA_WITH_3DES_EDE_CBC_SHA" },
    { 0xC01C, "TLS_SRP_SHA_DSS_WITH_3DES_EDE_CBC_SHA" },
    { 0xC01D, "TLS_SRP_SHA_WITH_AES_128_CBC_SHA" },
    { 0xC01E, "TLS_SRP_SHA_RSA_WITH_AES_128_CBC_SHA" },
    { 0xC01F, "TLS_SRP_SHA_DSS_WITH_AES_128_CBC_SHA" },
    { 0xC020, "TLS_SRP_SHA_WITH_AES_256_CBC_SHA" },
    { 0xC021, "TLS_SRP_SHA_RSA_WITH_AES_256_CBC_SHA" },
    { 0xC022, "TLS_SRP_SHA_DSS_WITH_AES_256_CBC_SHA" },

    /* these from http://www.mozilla.org/projects/
         security/pki/nss/ssl/fips-ssl-ciphersuites.html */
    { 0xfefe, "SSL_RSA_FIPS_WITH_DES_CBC_SHA"},
    { 0xfeff, "SSL_RSA_FIPS_WITH_3DES_EDE_CBC_SHA" },
    { 0xffe0, "SSL_RSA_FIPS_WITH_3DES_EDE_CBC_SHA" },
    { 0xffe1, "SSL_RSA_FIPS_WITH_DES_CBC_SHA"},
    /* note that ciphersuites 0xff00 - 0xffff are private */
    { 0x00, NULL }
};

const value_string pct_msg_types[] = {
    { PCT_MSG_CLIENT_HELLO,         "Client Hello" },
    { PCT_MSG_SERVER_HELLO,         "Server Hello" },
    { PCT_MSG_CLIENT_MASTER_KEY,    "Client Master Key" },
    { PCT_MSG_SERVER_VERIFY,        "Server Verify" },
    { PCT_MSG_ERROR,                "Error" },
    { 0x00, NULL }
};

const value_string pct_cipher_type[] = {
	{ PCT_CIPHER_DES, "DES" },
	{ PCT_CIPHER_IDEA, "IDEA" },
	{ PCT_CIPHER_RC2, "RC2" },
	{ PCT_CIPHER_RC4, "RC4" },
	{ PCT_CIPHER_DES_112, "DES 112 bit" },
	{ PCT_CIPHER_DES_168, "DES 168 bit" },
	{ 0x00, NULL }
};

const value_string pct_hash_type[] = {
	{ PCT_HASH_MD5, "MD5" },
	{ PCT_HASH_MD5_TRUNC_64, "MD5_TRUNC_64"},
	{ PCT_HASH_SHA, "SHA"},
	{ PCT_HASH_SHA_TRUNC_80, "SHA_TRUNC_80"},
	{ PCT_HASH_DES_DM, "DES_DM"},
	{ 0x00, NULL }
};

const value_string pct_cert_type[] = {
	{ PCT_CERT_NONE, "None" },
	{ PCT_CERT_X509, "X.509" },
	{ PCT_CERT_PKCS7, "PKCS #7" },
	{ 0x00, NULL }
};
const value_string pct_sig_type[] = {
	{ PCT_SIG_NONE, "None" },
	{ PCT_SIG_RSA_MD5, "MD5" },
	{ PCT_SIG_RSA_SHA, "RSA SHA" },
	{ PCT_SIG_DSA_SHA, "DSA SHA" },
	{ 0x00, NULL }
};

const value_string pct_exch_type[] = {
	{ PCT_EXCH_RSA_PKCS1, "RSA PKCS#1" },
	{ PCT_EXCH_RSA_PKCS1_TOKEN_DES, "RSA PKCS#1 Token DES" },
	{ PCT_EXCH_RSA_PKCS1_TOKEN_DES3, "RSA PKCS#1 Token 3DES" },
	{ PCT_EXCH_RSA_PKCS1_TOKEN_RC2, "RSA PKCS#1 Token RC-2" },
	{ PCT_EXCH_RSA_PKCS1_TOKEN_RC4, "RSA PKCS#1 Token RC-4" },
	{ PCT_EXCH_DH_PKCS3, "DH PKCS#3" },
	{ PCT_EXCH_DH_PKCS3_TOKEN_DES, "DH PKCS#3 Token DES" },
	{ PCT_EXCH_DH_PKCS3_TOKEN_DES3, "DH PKCS#3 Token 3DES" },
	{ PCT_EXCH_FORTEZZA_TOKEN, "Fortezza" },
	{ 0x00, NULL }
};

const value_string pct_error_code[] = {
	{ PCT_ERR_BAD_CERTIFICATE, "PCT_ERR_BAD_CERTIFICATE" },
	{ PCT_ERR_CLIENT_AUTH_FAILED, "PCT_ERR_CLIENT_AUTH_FAILE" },
	{ PCT_ERR_ILLEGAL_MESSAGE, "PCT_ERR_ILLEGAL_MESSAGE" },
	{ PCT_ERR_INTEGRITY_CHECK_FAILED, "PCT_ERR_INTEGRITY_CHECK_FAILED" },
	{ PCT_ERR_SERVER_AUTH_FAILED, "PCT_ERR_SERVER_AUTH_FAILED" },
	{ PCT_ERR_SPECS_MISMATCH, "PCT_ERR_SPECS_MISMATCH" },
	{ 0x00, NULL }
};

/* RFC 4366 */
const value_string tls_hello_extension_types[] = {
	{ 0, "server_name" },
	{ 1, "max_fragment_length" },
	{ 2, "client_certificate_url" },
	{ 3, "trusted_ca_keys" },
	{ 4, "truncated_hmac" },
	{ 5, "status_request" },
	{ 6, "user_mapping" },
	{ 7, "Reserved" },
	{ 8, "Reserved" },
	{ 9, "cert_type" },
	{ 10, "elliptic_curves" },
	{ 11, "ec_point_formats" },
	{ 35, "SessionTicket TLS" },
	{ 0, NULL }
};


/* we keep this internal to packet-ssl-utils, as there should be
   no need to access it any other way.

   This also allows us to hide the dependency on zlib.
*/
struct _SslDecompress {
    gint compression;
#ifdef HAVE_LIBZ
    z_stream istream;
#endif
};

static gint
ssl_data_alloc(StringInfo* str, guint len)
{
    str->data = g_malloc(len);
    if (!str->data)
        return -1;
    str->data_len = len;
    return 0;
}

void
ssl_data_set(StringInfo* str, const guchar* data, guint len)
{
    memcpy(str->data, data, len);
    str->data_len = len;
}

#ifdef HAVE_LIBGNUTLS

static gint ver_major, ver_minor, ver_patch;

/* hmac abstraction layer */
#define SSL_HMAC gcry_md_hd_t

static inline void
ssl_hmac_init(SSL_HMAC* md, const void * key, gint len, gint algo)
{
    gcry_md_open(md,algo, GCRY_MD_FLAG_HMAC);
    gcry_md_setkey (*(md), key, len);
}
static inline void
ssl_hmac_update(SSL_HMAC* md, const void* data, gint len)
{
    gcry_md_write(*(md), data, len);
}
static inline void
ssl_hmac_final(SSL_HMAC* md, guchar* data, guint* datalen)
{
    gint algo;
    guint len;
    algo = gcry_md_get_algo (*(md));
    len = gcry_md_get_algo_dlen(algo);
    memcpy(data, gcry_md_read(*(md), algo), len);
    *datalen =len;
}
static inline void
ssl_hmac_cleanup(SSL_HMAC* md)
{
    gcry_md_close(*(md));
}

/* memory digest abstraction layer*/
#define SSL_MD gcry_md_hd_t

static inline void
ssl_md_init(SSL_MD* md, gint algo)
{
    gcry_md_open(md,algo, 0);
}
static inline void
ssl_md_update(SSL_MD* md, guchar* data, gint len)
{
    gcry_md_write(*(md), data, len);
}
static inline void
ssl_md_final(SSL_MD* md, guchar* data, guint* datalen)
{
    gint algo;
    gint len;
    algo = gcry_md_get_algo (*(md));
    len = gcry_md_get_algo_dlen (algo);
    memcpy(data, gcry_md_read(*(md),  algo), len);
    *datalen = len;
}
static inline void
ssl_md_cleanup(SSL_MD* md)
{
    gcry_md_close(*(md));
}

/* md5 /sha abstraction layer */
#define SSL_SHA_CTX gcry_md_hd_t
#define SSL_MD5_CTX gcry_md_hd_t

static inline void
ssl_sha_init(SSL_SHA_CTX* md)
{
    gcry_md_open(md,GCRY_MD_SHA1, 0);
}
static inline void
ssl_sha_update(SSL_SHA_CTX* md, guchar* data, gint len)
{
    gcry_md_write(*(md), data, len);
}
static inline void
ssl_sha_final(guchar* buf, SSL_SHA_CTX* md)
{
    memcpy(buf, gcry_md_read(*(md),  GCRY_MD_SHA1),
        gcry_md_get_algo_dlen(GCRY_MD_SHA1));
}
static inline void
ssl_sha_cleanup(SSL_SHA_CTX* md)
{
    gcry_md_close(*(md));
}

static inline gint
ssl_md5_init(SSL_MD5_CTX* md)
{
    return gcry_md_open(md,GCRY_MD_MD5, 0);
}
static inline void
ssl_md5_update(SSL_MD5_CTX* md, guchar* data, gint len)
{
    gcry_md_write(*(md), data, len);
}
static inline void
ssl_md5_final(guchar* buf, SSL_MD5_CTX* md)
{
    memcpy(buf, gcry_md_read(*(md),  GCRY_MD_MD5),
        gcry_md_get_algo_dlen(GCRY_MD_MD5));
}
static inline void
ssl_md5_cleanup(SSL_MD5_CTX* md)
{
    gcry_md_close(*(md));
}

gint
ssl_cipher_setiv(SSL_CIPHER_CTX *cipher, guchar* iv, gint iv_len)
{
  /* guchar * ivp; */
  gint ret;
  /* gint i; */
  gcry_cipher_hd_t c;
  ret=0;
  c=(gcry_cipher_hd_t)*cipher;

  ssl_debug_printf("--------------------------------------------------------------------");
  /*for(ivp=c->iv,i=0; i < iv_len; i++ )
    {
      ssl_debug_printf("%d ",ivp[i]);
      i++;
    }
  */
  ssl_debug_printf("--------------------------------------------------------------------");
  ret = gcry_cipher_setiv(*(cipher), iv, iv_len);
  /*for(ivp=c->iv,i=0; i < iv_len; i++ )
    {
      ssl_debug_printf("%d ",ivp[i]);
      i++;
    }
  */
  ssl_debug_printf("--------------------------------------------------------------------");
  return ret;
}
/* stream cipher abstraction layer*/
static gint
ssl_cipher_init(gcry_cipher_hd_t *cipher, gint algo, guchar* sk,
        guchar* iv, gint mode)
{
    gint gcry_modes[]={GCRY_CIPHER_MODE_STREAM,GCRY_CIPHER_MODE_CBC};
    gint err;
    err = gcry_cipher_open(cipher, algo, gcry_modes[mode], 0);
    if (err !=0)
        return  -1;
    err = gcry_cipher_setkey(*(cipher), sk, gcry_cipher_get_algo_keylen (algo));
    if (err != 0)
        return -1;
    err = gcry_cipher_setiv(*(cipher), iv, gcry_cipher_get_algo_blklen (algo));
    if (err != 0)
        return -1;
    return 0;
}
static inline gint
ssl_cipher_decrypt(gcry_cipher_hd_t *cipher, guchar * out, gint outl,
                   const guchar * in, gint inl)
{
    return gcry_cipher_decrypt ( *(cipher), out, outl, in, inl);
}
static inline gint
ssl_get_digest_by_name(const gchar*name)
{
    return gcry_md_map_name(name);
}
static inline gint
ssl_get_cipher_by_name(const gchar* name)
{
    return gcry_cipher_map_name(name);
}

static inline void
ssl_cipher_cleanup(gcry_cipher_hd_t *cipher)
{
    gcry_cipher_close(*cipher);
    *cipher = NULL;
}

/* private key abstraction layer */
static inline gint
ssl_get_key_len(SSL_PRIVATE_KEY* pk) {return gcry_pk_get_nbits (pk); }

gcry_err_code_t
_gcry_rsa_decrypt (int algo, gcry_mpi_t *result, gcry_mpi_t *data,
                   gcry_mpi_t *skey, gint flags);

#define PUBKEY_FLAG_NO_BLINDING (1 << 0)

/* decrypt data with private key. Store decrypted data directly into input
 * buffer */
int
ssl_private_decrypt(guint len, guchar* encr_data, SSL_PRIVATE_KEY* pk)
{
    gint rc;
    size_t decr_len;
    gcry_sexp_t  s_data, s_plain;
    gcry_mpi_t encr_mpi;
    size_t i, encr_len;
    guchar* decr_data_ptr;
    gcry_mpi_t text;
    decr_len = 0;
    encr_len = len;
    text=NULL;
    /* build up a mpi rappresentation for encrypted data */
    rc = gcry_mpi_scan(&encr_mpi, GCRYMPI_FMT_USG,encr_data, encr_len, &encr_len);
    if (rc != 0 ) {
        ssl_debug_printf("pcry_private_decrypt: can't convert encr_data to mpi (size %d):%s\n",
            len, gcry_strerror(rc));
        return 0;
    }

#ifndef SSL_FAST
    /* put the data into a simple list */
    rc = gcry_sexp_build(&s_data, NULL, "(enc-val(rsa(a%m)))", encr_mpi);
    if (rc != 0) {
        ssl_debug_printf("pcry_private_decrypt: can't build encr_sexp:%s \n",
             gcry_strerror(rc));
        return 0;
    }

    /* pass it to libgcrypt */
    rc = gcry_pk_decrypt(&s_plain, s_data, pk);
    gcry_sexp_release(s_data);
    if (rc != 0)
    {
        ssl_debug_printf("pcry_private_decrypt: can't decrypt key:%s\n",
            gcry_strerror(rc));
        goto out;
    }

    /* convert plain text sexp to mpi format */
    text = gcry_sexp_nth_mpi(s_plain, 0, 0);

    /* compute size requested for plaintext buffer */
    decr_len = len;
    if (gcry_mpi_print(GCRYMPI_FMT_USG, NULL, decr_len, &decr_len, text) != 0) {
        ssl_debug_printf("pcry_private_decrypt: can't compute decr size:%s\n",
            gcry_strerror(rc));
        decr_len = 0;
        goto out;
    }

    /* sanity check on out buffer */
    if (decr_len > len) {
        ssl_debug_printf("pcry_private_decrypt: decrypted data is too long ?!? (%zd max %d)\n",
            decr_len, len);
        return 0;
    }

    /* write plain text to encrypted data buffer */
    decr_data_ptr = encr_data;
    if (gcry_mpi_print( GCRYMPI_FMT_USG, decr_data_ptr, decr_len, &decr_len,
            text) != 0) {
        ssl_debug_printf("pcry_private_decrypt: can't print decr data to mpi (size %zd):%s\n",
            decr_len, gcry_strerror(rc));
        g_free(decr_data_ptr);
        decr_len = 0;
        goto out;
    }

    /* strip the padding*/
    rc = 0;
    for (i = 1; i < decr_len; i++) {
        if (decr_data_ptr[i] == 0) {
            rc = i+1;
            break;
        }
    }

    ssl_debug_printf("pcry_private_decrypt: stripping %d bytes, decr_len %zd\n",
        rc, decr_len);
    ssl_print_data("decrypted_unstrip_pre_master", decr_data_ptr, decr_len);
    g_memmove(decr_data_ptr, &decr_data_ptr[rc], decr_len - rc);
    decr_len -= rc;

out:
    gcry_sexp_release(s_plain);
#else /* SSL_FAST */
    rc = _gcry_rsa_decrypt(0, &text,  &encr_mpi, pk,0);
    gcry_mpi_print( GCRYMPI_FMT_USG, 0, 0, &decr_len, text);

    /* sanity check on out buffer */
    if (decr_len > len) {
        ssl_debug_printf("pcry_private_decrypt: decrypted data is too long ?!? (%d max %d)\n",
            decr_len, len);
        return 0;
    }

    /* write plain text to newly allocated buffer */
    decr_data_ptr = encr_data;
    if (gcry_mpi_print( GCRYMPI_FMT_USG, decr_data_ptr, decr_len, &decr_len,
            text) != 0) {
        ssl_debug_printf("pcry_private_decrypt: can't print decr data to mpi (size %d):%s\n",
            decr_len, gcry_strerror(rc));
        return 0;
    }

    /* strip the padding*/
    rc = 0;
    for (i = 1; i < decr_len; i++) {
        if (decr_data_ptr[i] == 0) {
            rc = i+1;
            break;
        }
    }

    ssl_debug_printf("pcry_private_decrypt: stripping %d bytes, decr_len %d\n",
        rc, decr_len);
    ssl_print_data("decrypted_unstrip_pre_master", decr_data_ptr, decr_len);
    g_memmove(decr_data_ptr, &decr_data_ptr[rc], decr_len - rc);
    decr_len -= rc;
#endif /* SSL_FAST */
    gcry_mpi_release(text);
    return decr_len;
}

/* stringinfo interface */
static gint
ssl_data_realloc(StringInfo* str, guint len)
{
    str->data = g_realloc(str->data, len);
    if (!str->data)
        return -1;
    str->data_len = len;
    return 0;
}

static gint
ssl_data_copy(StringInfo* dst, StringInfo* src)
{
    if (dst->data_len < src->data_len) {
      if (ssl_data_realloc(dst, src->data_len))
        return -1;
    }
    memcpy(dst->data, src->data, src->data_len);
    dst->data_len = src->data_len;
    return 0;
}

#define PRF(ssl,secret,usage,rnd1,rnd2,out) ((ssl->version_netorder==SSLV3_VERSION)? \
        ssl3_prf(secret,usage,rnd1,rnd2,out): \
        tls_prf(secret,usage,rnd1,rnd2,out))

static const gchar *digests[]={
     "MD5",
     "SHA1"
};

static const gchar *ciphers[]={
     "DES",
     "3DES",
     "ARCFOUR", /* gnutls does not support rc4, but this should be 100% compatible*/
     "RC2",
     "IDEA",
     "AES",
     "AES256",
     "*UNKNOWN*"
};

/* look in openssl/ssl/ssl_lib.c for a complete list of available cipersuite*/
static SslCipherSuite cipher_suites[]={
    {1,KEX_RSA,SIG_RSA,ENC_NULL,0,0,0,DIG_MD5,16,0, SSL_CIPHER_MODE_STREAM},
    {2,KEX_RSA,SIG_RSA,ENC_NULL,0,0,0,DIG_SHA,20,0, SSL_CIPHER_MODE_STREAM},
    {3,KEX_RSA,SIG_RSA,ENC_RC4,1,128,40,DIG_MD5,16,1, SSL_CIPHER_MODE_STREAM},
    {4,KEX_RSA,SIG_RSA,ENC_RC4,1,128,128,DIG_MD5,16,0, SSL_CIPHER_MODE_STREAM},
    {5,KEX_RSA,SIG_RSA,ENC_RC4,1,128,128,DIG_SHA,20,0, SSL_CIPHER_MODE_STREAM},
    {6,KEX_RSA,SIG_RSA,ENC_RC2,8,128,40,DIG_SHA,20,1, SSL_CIPHER_MODE_STREAM},
    {7,KEX_RSA,SIG_RSA,ENC_IDEA,8,128,128,DIG_SHA,20,0, SSL_CIPHER_MODE_STREAM},
    {8,KEX_RSA,SIG_RSA,ENC_DES,8,64,40,DIG_SHA,20,1, SSL_CIPHER_MODE_CBC},
    {9,KEX_RSA,SIG_RSA,ENC_DES,8,64,64,DIG_SHA,20,0, SSL_CIPHER_MODE_CBC},
    {10,KEX_RSA,SIG_RSA,ENC_3DES,8,192,192,DIG_SHA,20,0, SSL_CIPHER_MODE_CBC},
    {11,KEX_DH,SIG_DSS,ENC_DES,8,64,40,DIG_SHA,20,1, SSL_CIPHER_MODE_STREAM},
    {12,KEX_DH,SIG_DSS,ENC_DES,8,64,64,DIG_SHA,20,0, SSL_CIPHER_MODE_STREAM},
    {13,KEX_DH,SIG_DSS,ENC_3DES,8,192,192,DIG_SHA,20,0, SSL_CIPHER_MODE_STREAM},
    {14,KEX_DH,SIG_RSA,ENC_DES,8,64,40,DIG_SHA,20,1, SSL_CIPHER_MODE_STREAM},
    {15,KEX_DH,SIG_RSA,ENC_DES,8,64,64,DIG_SHA,20,0, SSL_CIPHER_MODE_STREAM},
    {16,KEX_DH,SIG_RSA,ENC_3DES,8,192,192,DIG_SHA,20,0, SSL_CIPHER_MODE_STREAM},
    {17,KEX_DH,SIG_DSS,ENC_DES,8,64,40,DIG_SHA,20,1, SSL_CIPHER_MODE_STREAM},
    {18,KEX_DH,SIG_DSS,ENC_DES,8,64,64,DIG_SHA,20,0, SSL_CIPHER_MODE_STREAM},
    {19,KEX_DH,SIG_DSS,ENC_3DES,8,192,192,DIG_SHA,20,0, SSL_CIPHER_MODE_STREAM},
    {20,KEX_DH,SIG_RSA,ENC_DES,8,64,40,DIG_SHA,20,1, SSL_CIPHER_MODE_STREAM},
    {21,KEX_DH,SIG_RSA,ENC_DES,8,64,64,DIG_SHA,20,0, SSL_CIPHER_MODE_STREAM},
    {22,KEX_DH,SIG_RSA,ENC_3DES,8,192,192,DIG_SHA,20,0, SSL_CIPHER_MODE_STREAM},
    {23,KEX_DH,SIG_NONE,ENC_RC4,1,128,40,DIG_MD5,16,1, SSL_CIPHER_MODE_STREAM},
    {24,KEX_DH,SIG_NONE,ENC_RC4,1,128,128,DIG_MD5,16,0, SSL_CIPHER_MODE_STREAM},
    {25,KEX_DH,SIG_NONE,ENC_DES,8,64,40,DIG_MD5,16,1, SSL_CIPHER_MODE_STREAM},
    {26,KEX_DH,SIG_NONE,ENC_DES,8,64,64,DIG_MD5,16,0, SSL_CIPHER_MODE_STREAM},
    {27,KEX_DH,SIG_NONE,ENC_3DES,8,192,192,DIG_MD5,16,0, SSL_CIPHER_MODE_STREAM},
    {47,KEX_RSA,SIG_RSA,ENC_AES,16,128,128,DIG_SHA,20,0, SSL_CIPHER_MODE_CBC},
    {53,KEX_RSA,SIG_RSA,ENC_AES256,16,256,256,DIG_SHA,20,0, SSL_CIPHER_MODE_CBC},
    {96,KEX_RSA,SIG_RSA,ENC_RC4,1,128,56,DIG_MD5,16,1, SSL_CIPHER_MODE_STREAM},
    {97,KEX_RSA,SIG_RSA,ENC_RC2,1,128,56,DIG_MD5,16,1, SSL_CIPHER_MODE_STREAM},
    {98,KEX_RSA,SIG_RSA,ENC_DES,8,64,64,DIG_SHA,20,1, SSL_CIPHER_MODE_STREAM},
    {99,KEX_DH,SIG_DSS,ENC_DES,8,64,64,DIG_SHA,16,1, SSL_CIPHER_MODE_STREAM},
    {100,KEX_RSA,SIG_RSA,ENC_RC4,1,128,56,DIG_SHA,20,1, SSL_CIPHER_MODE_STREAM},
    {101,KEX_DH,SIG_DSS,ENC_RC4,1,128,56,DIG_SHA,20,1, SSL_CIPHER_MODE_STREAM},
    {102,KEX_DH,SIG_DSS,ENC_RC4,1,128,128,DIG_SHA,20,0, SSL_CIPHER_MODE_STREAM},
    {-1, 0,0,0,0,0,0,0,0,0, 0}
};

#define MAX_BLOCK_SIZE 16
#define MAX_KEY_SIZE 32

int
ssl_find_cipher(int num,SslCipherSuite* cs)
{
    SslCipherSuite *c;

    for(c=cipher_suites;c->number!=-1;c++){
        if(c->number==num){
            *cs=*c;
            return 0;
        }
    }

    return -1;
}

static gint
tls_hash(StringInfo* secret,
        StringInfo* seed, gint md, StringInfo* out)
{
    guint8 *ptr;
    guint left;
    gint tocpy;
    guint8 *A;
    guint8 _A[20],tmp[20];
    guint A_l,tmp_l;
    SSL_HMAC hm;
    ptr=out->data;
    left=out->data_len;


    ssl_print_string("tls_hash: hash secret", secret);
    ssl_print_string("tls_hash: hash seed", seed);
    A=seed->data;
    A_l=seed->data_len;

    while(left){
        ssl_hmac_init(&hm,secret->data,secret->data_len,md);
        ssl_hmac_update(&hm,A,A_l);
        ssl_hmac_final(&hm,_A,&A_l);
        ssl_hmac_cleanup(&hm);
        A=_A;

        ssl_hmac_init(&hm,secret->data,secret->data_len,md);
        ssl_hmac_update(&hm,A,A_l);
        ssl_hmac_update(&hm,seed->data,seed->data_len);
        ssl_hmac_final(&hm,tmp,&tmp_l);
        ssl_hmac_cleanup(&hm);

        tocpy=MIN(left,tmp_l);
        memcpy(ptr,tmp,tocpy);
        ptr+=tocpy;
        left-=tocpy;
    }

    ssl_print_string("hash out", out);
    return (0);
}

static gint
tls_prf(StringInfo* secret, const gchar *usage,
        StringInfo* rnd1, StringInfo* rnd2, StringInfo* out)
{
    StringInfo seed, sha_out, md5_out;
    guint8 *ptr;
    StringInfo s1, s2;
    guint i,s_l, r;
    gint usage_len;
    r=-1;
    usage_len = strlen(usage);

    /* initalize buffer for sha, md5 random seed*/
    if (ssl_data_alloc(&sha_out, MAX(out->data_len,20)) < 0)
        return -1;
    if (ssl_data_alloc(&md5_out, MAX(out->data_len,16)) < 0)
        goto free_sha;
    if (ssl_data_alloc(&seed, usage_len+rnd1->data_len+rnd2->data_len) < 0)
        goto free_md5;

    ptr=seed.data;
    memcpy(ptr,usage,usage_len); ptr+=usage_len;
    memcpy(ptr,rnd1->data,rnd1->data_len); ptr+=rnd1->data_len;
    memcpy(ptr,rnd2->data,rnd2->data_len); ptr+=rnd2->data_len;

    /* initalize buffer for client/server seeds*/
    s_l=secret->data_len/2 + secret->data_len%2;
    if (ssl_data_alloc(&s1, s_l) < 0)
        goto free_seed;
    if (ssl_data_alloc(&s2, s_l) < 0)
        goto free_s1;

    memcpy(s1.data,secret->data,s_l);
    memcpy(s2.data,secret->data + (secret->data_len - s_l),s_l);

    ssl_debug_printf("tls_prf: tls_hash(md5 secret_len %d seed_len %d )\n", s1.data_len, seed.data_len);
    if(tls_hash(&s1,&seed,ssl_get_digest_by_name("MD5"),&md5_out) != 0)
        goto free_all;
    ssl_debug_printf("tls_prf: tls_hash(sha)\n");
    if(tls_hash(&s2,&seed,ssl_get_digest_by_name("SHA1"),&sha_out) != 0)
        goto free_all;

    for(i=0;i<out->data_len;i++)
      out->data[i]=md5_out.data[i] ^ sha_out.data[i];
    r =0;

    ssl_print_string("PRF out",out);
free_all:
    g_free(s2.data);
free_s1:
    g_free(s1.data);
free_seed:
    g_free(seed.data);
free_md5:
    g_free(md5_out.data);
free_sha:
    g_free(sha_out.data);
    return r;
}

static gint
ssl3_generate_export_iv(StringInfo* r1,
        StringInfo* r2, StringInfo* out)
{
    SSL_MD5_CTX md5;
    guint8 tmp[16];

    ssl_md5_init(&md5);
    ssl_md5_update(&md5,r1->data,r1->data_len);
    ssl_md5_update(&md5,r2->data,r2->data_len);
    ssl_md5_final(tmp,&md5);
    ssl_md5_cleanup(&md5);

    memcpy(out->data,tmp,out->data_len);
    ssl_print_string("export iv", out);

    return(0);
}

static gint
ssl3_prf(StringInfo* secret, const gchar* usage,
        StringInfo* r1,
        StringInfo* r2,StringInfo* out)
{
    SSL_MD5_CTX md5;
    SSL_SHA_CTX sha;
    StringInfo *rnd1,*rnd2;
    guint off;
    gint i=0,j;
    guint8 buf[20];

    rnd1=r1; rnd2=r2;

    for(off=0;off<out->data_len;off+=16){
        guchar outbuf[16];
        gint tocpy;
        i++;

        ssl_debug_printf("ssl3_prf: sha1_hash(%d)\n",i);
        /* A, BB, CCC,  ... */
        for(j=0;j<i;j++){
            buf[j]=64+i;
        }

        ssl_sha_init(&sha);
        ssl_sha_update(&sha,buf,i);
        ssl_sha_update(&sha,secret->data,secret->data_len);

        if(!strcmp(usage,"client write key") || !strcmp(usage,"server write key")){
            ssl_sha_update(&sha,rnd2->data,rnd2->data_len);
            ssl_sha_update(&sha,rnd1->data,rnd1->data_len);
        }
        else{
            ssl_sha_update(&sha,rnd1->data,rnd1->data_len);
            ssl_sha_update(&sha,rnd2->data,rnd2->data_len);
        }

        ssl_sha_final(buf,&sha);
        ssl_sha_cleanup(&sha);

        ssl_debug_printf("ssl3_prf: md5_hash(%d) datalen %d\n",i,
            secret->data_len);
        ssl_md5_init(&md5);
        ssl_md5_update(&md5,secret->data,secret->data_len);
        ssl_md5_update(&md5,buf,20);
        ssl_md5_final(outbuf,&md5);
        ssl_md5_cleanup(&md5);

        tocpy=MIN(out->data_len-off,16);
        memcpy(out->data+off,outbuf,tocpy);
    }

    return(0);
}

static SslFlow*
ssl_create_flow(void)
{
  SslFlow *flow;

  flow = se_alloc(sizeof(SslFlow));
  flow->byte_seq = 0;
  flow->flags = 0;
  flow->multisegment_pdus = se_tree_create_non_persistent(EMEM_TREE_TYPE_RED_BLACK, "ssl_multisegment_pdus");
  return flow;
}

/* memory allocations functions for zlib intialization */
static void* ssl_zalloc(void* opaque _U_, unsigned int no, unsigned int size)
{
	return g_malloc0(no*size);
}
static void ssl_zfree(void* opaque _U_, void* address)
{
	g_free(address);
}

static SslDecompress*
ssl_create_decompressor(gint compression)
{
  SslDecompress *decomp;
#ifdef HAVE_LIBZ
  int err;
#endif

  if (compression == 0) return NULL;
  ssl_debug_printf("ssl_create_decompressor: compression method %d\n", compression);
  decomp = se_alloc(sizeof(SslDecompress));
  decomp->compression = compression;
  switch (decomp->compression) {
#ifdef HAVE_LIBZ
    case 1:  /* DEFLATE */
      decomp->istream.zalloc = ssl_zalloc;
      decomp->istream.zfree = ssl_zfree;
      decomp->istream.opaque = Z_NULL;
      decomp->istream.next_in = Z_NULL;
      decomp->istream.next_out = Z_NULL;
      decomp->istream.avail_in = 0;
      decomp->istream.avail_out = 0;
      err = inflateInit_(&decomp->istream, ZLIB_VERSION, sizeof(z_stream));
      if (err != Z_OK) {
        ssl_debug_printf("ssl_create_decompressor: inflateInit_() failed - %d\n", err);
        return NULL;
      }
      break;
#endif
    default:
      ssl_debug_printf("ssl_create_decompressor: unsupported compression method %d\n", decomp->compression);
      return NULL;
  }
  return decomp;
}

static SslDecoder*
ssl_create_decoder(SslCipherSuite *cipher_suite, gint compression,
        guint8 *mk, guint8 *sk, guint8 *iv)
{
    SslDecoder *dec;
    gint ciph;
    ciph=0;

    dec = se_alloc0(sizeof(SslDecoder));
    /* Find the SSLeay cipher */
    if(cipher_suite->enc!=ENC_NULL) {
        ssl_debug_printf("ssl_create_decoder CIPHER: %s\n", ciphers[cipher_suite->enc-0x30]);
        ciph=ssl_get_cipher_by_name(ciphers[cipher_suite->enc-0x30]);
    }
    if (ciph == 0) {
        ssl_debug_printf("ssl_create_decoder can't find cipher %s\n",
            ciphers[(cipher_suite->enc-0x30) > 7 ? 7 : (cipher_suite->enc-0x30)]);
        return NULL;
    }

    /* init mac buffer: mac storage is embedded into decoder struct to save a
     memory allocation and waste samo more memory*/
    dec->cipher_suite=cipher_suite;
    dec->compression = compression;
    dec->mac_key.data = dec->_mac_key;
    ssl_data_set(&dec->mac_key, mk, cipher_suite->dig_len);
    dec->seq = 0;
    dec->decomp = ssl_create_decompressor(compression);
    dec->flow = ssl_create_flow();

    if (dec->evp)
        ssl_cipher_cleanup(&dec->evp);

    if (ssl_cipher_init(&dec->evp,ciph,sk,iv,cipher_suite->mode) < 0) {
        ssl_debug_printf("ssl_create_decoder: can't create cipher id:%d mode:%d\n",
            ciph, cipher_suite->mode);
        return NULL;
    }

    ssl_debug_printf("decoder initialized (digest len %d)\n", cipher_suite->dig_len);
    return dec;
}

int
ssl_generate_keyring_material(SslDecryptSession*ssl_session)
{
    StringInfo key_block;
    guint8 _iv_c[MAX_BLOCK_SIZE],_iv_s[MAX_BLOCK_SIZE];
    guint8 _key_c[MAX_KEY_SIZE],_key_s[MAX_KEY_SIZE];
    gint needed;
    guint8 *ptr,*c_wk,*s_wk,*c_mk,*s_mk,*c_iv = _iv_c,*s_iv = _iv_s;

    /* if master_key is not yet generate, create it now*/
    if (!(ssl_session->state & SSL_MASTER_SECRET)) {
        ssl_debug_printf("ssl_generate_keyring_material:PRF(pre_master_secret)\n");
        if (PRF(ssl_session,&ssl_session->pre_master_secret,"master secret",
                &ssl_session->client_random,
                &ssl_session->server_random, &ssl_session->master_secret)) {
            ssl_debug_printf("ssl_generate_keyring_material can't generate master_secret\n");
            return -1;
        }
        ssl_print_string("master secret",&ssl_session->master_secret);
    }

    /* Compute the key block. First figure out how much data we need*/
    needed=ssl_session->cipher_suite.dig_len*2;
    needed+=ssl_session->cipher_suite.bits / 4;
    if(ssl_session->cipher_suite.block>1)
        needed+=ssl_session->cipher_suite.block*2;

    key_block.data_len = needed;
    key_block.data = g_malloc(needed);
    if (!key_block.data) {
        ssl_debug_printf("ssl_generate_keyring_material can't allacate key_block\n");
        return -1;
    }
    ssl_debug_printf("ssl_generate_keyring_material sess key generation\n");
    if (PRF(ssl_session,&ssl_session->master_secret,"key expansion",
            &ssl_session->server_random,&ssl_session->client_random,
            &key_block)) {
        ssl_debug_printf("ssl_generate_keyring_material can't generate key_block\n");
        goto fail;
    }
    ssl_print_string("key expansion", &key_block);

    ptr=key_block.data;
    c_mk=ptr; ptr+=ssl_session->cipher_suite.dig_len;
    s_mk=ptr; ptr+=ssl_session->cipher_suite.dig_len;

    c_wk=ptr; ptr+=ssl_session->cipher_suite.eff_bits/8;
    s_wk=ptr; ptr+=ssl_session->cipher_suite.eff_bits/8;

    if(ssl_session->cipher_suite.block>1){
        c_iv=ptr; ptr+=ssl_session->cipher_suite.block;
        s_iv=ptr; ptr+=ssl_session->cipher_suite.block;
    }

    if(ssl_session->cipher_suite.export){
        StringInfo iv_c,iv_s;
        StringInfo key_c,key_s;
        StringInfo k;

        if(ssl_session->cipher_suite.block>1){

            /* We only have room for MAX_BLOCK_SIZE bytes IVs, but that's
             all we should need. This is a sanity check */
            if(ssl_session->cipher_suite.block>MAX_BLOCK_SIZE) {
                ssl_debug_printf("ssl_generate_keyring_material cipher suite block must be at most %d nut is %d\n",
                    MAX_BLOCK_SIZE, ssl_session->cipher_suite.block);
                goto fail;
            }

            iv_c.data = _iv_c;
            iv_c.data_len = ssl_session->cipher_suite.block;
            iv_s.data = _iv_s;
            iv_s.data_len = ssl_session->cipher_suite.block;

            if(ssl_session->version_netorder==SSLV3_VERSION){
                ssl_debug_printf("ssl_generate_keyring_material ssl3_generate_export_iv\n");
                if (ssl3_generate_export_iv(&ssl_session->client_random,
                        &ssl_session->server_random,&iv_c)) {
                    ssl_debug_printf("ssl_generate_keyring_material can't generate sslv3 client iv\n");
                    goto fail;
                }
                ssl_debug_printf("ssl_generate_keyring_material ssl3_generate_export_iv(2)\n");
                if (ssl3_generate_export_iv(&ssl_session->server_random,
                        &ssl_session->client_random,&iv_s)) {
                    ssl_debug_printf("ssl_generate_keyring_material can't generate sslv3 server iv\n");
                    goto fail;
                }
            }
            else{
                guint8 _iv_block[MAX_BLOCK_SIZE * 2];
                StringInfo iv_block;
                StringInfo key_null;
                guint8 _key_null;

                key_null.data = &_key_null;
                key_null.data_len = 0;

                iv_block.data = _iv_block;
                iv_block.data_len = ssl_session->cipher_suite.block*2;

                ssl_debug_printf("ssl_generate_keyring_material prf(iv_block)\n");
                if(PRF(ssl_session,&key_null, "IV block",
                        &ssl_session->client_random,
                        &ssl_session->server_random,&iv_block)) {
                    ssl_debug_printf("ssl_generate_keyring_material can't generate tls31 iv block\n");
                    goto fail;
                }

                memcpy(_iv_c,iv_block.data,ssl_session->cipher_suite.block);
                memcpy(_iv_s,iv_block.data+ssl_session->cipher_suite.block,
                    ssl_session->cipher_suite.block);
            }

            c_iv=_iv_c;
            s_iv=_iv_s;
        }

        if (ssl_session->version_netorder==SSLV3_VERSION){

            SSL_MD5_CTX md5;
            ssl_debug_printf("ssl_generate_keyring_material MD5(client_random)\n");

            ssl_md5_init(&md5);
            ssl_md5_update(&md5,c_wk,ssl_session->cipher_suite.eff_bits/8);
            ssl_md5_update(&md5,ssl_session->client_random.data,
                ssl_session->client_random.data_len);
            ssl_md5_update(&md5,ssl_session->server_random.data,
                ssl_session->server_random.data_len);
            ssl_md5_final(_key_c,&md5);
            ssl_md5_cleanup(&md5);
            c_wk=_key_c;

            ssl_md5_init(&md5);
            ssl_debug_printf("ssl_generate_keyring_material MD5(server_random)\n");
            ssl_md5_update(&md5,s_wk,ssl_session->cipher_suite.eff_bits/8);
            ssl_md5_update(&md5,ssl_session->server_random.data,
                ssl_session->server_random.data_len);
            ssl_md5_update(&md5,ssl_session->client_random.data,
                ssl_session->client_random.data_len);
            ssl_md5_final(_key_s,&md5);
            ssl_md5_cleanup(&md5);
            s_wk=_key_s;
        }
        else{
            key_c.data = _key_c;
            key_c.data_len = sizeof(_key_c);
            key_s.data = _key_s;
            key_s.data_len = sizeof(_key_s);

            k.data = c_wk;
            k.data_len = ssl_session->cipher_suite.eff_bits/8;
            ssl_debug_printf("ssl_generate_keyring_material PRF(key_c)\n");
            if (PRF(ssl_session,&k,"client write key",
                    &ssl_session->client_random,
                    &ssl_session->server_random, &key_c)) {
                ssl_debug_printf("ssl_generate_keyring_material can't generate tll31 server key \n");
                goto fail;
            }
            c_wk=_key_c;

            k.data = s_wk;
            k.data_len = ssl_session->cipher_suite.eff_bits/8;
            ssl_debug_printf("ssl_generate_keyring_material PRF(key_s)\n");
            if(PRF(ssl_session,&k,"server write key",
                    &ssl_session->client_random,
                    &ssl_session->server_random, &key_s)) {
                ssl_debug_printf("ssl_generate_keyring_material can't generate tll31 client key \n");
                goto fail;
            }
            s_wk=_key_s;
        }
    }

    /* show key material info */
    ssl_print_data("Client MAC key",c_mk,ssl_session->cipher_suite.dig_len);
    ssl_print_data("Server MAC key",s_mk,ssl_session->cipher_suite.dig_len);
    ssl_print_data("Client Write key",c_wk,ssl_session->cipher_suite.bits/8);
    ssl_print_data("Server Write key",s_wk,ssl_session->cipher_suite.bits/8);

    if(ssl_session->cipher_suite.block>1) {
        ssl_print_data("Client Write IV",c_iv,ssl_session->cipher_suite.block);
        ssl_print_data("Server Write IV",s_iv,ssl_session->cipher_suite.block);
    }
    else {
        ssl_print_data("Client Write IV",c_iv,8);
        ssl_print_data("Server Write IV",s_iv,8);
    }

    /* create both client and server ciphers*/
    ssl_debug_printf("ssl_generate_keyring_material ssl_create_decoder(client)\n");
    ssl_session->client_new = ssl_create_decoder(&ssl_session->cipher_suite, ssl_session->compression, c_mk, c_wk, c_iv);
    if (!ssl_session->client_new) {
        ssl_debug_printf("ssl_generate_keyring_material can't init client decoder\n");
        goto fail;
    }
    ssl_debug_printf("ssl_generate_keyring_material ssl_create_decoder(server)\n");
    ssl_session->server_new = ssl_create_decoder(&ssl_session->cipher_suite, ssl_session->compression, s_mk, s_wk, s_iv);
    if (!ssl_session->server_new) {
        ssl_debug_printf("ssl_generate_keyring_material can't init client decoder\n");
        goto fail;
    }

    ssl_debug_printf("ssl_generate_keyring_material: client seq %d, server seq %d\n",
        ssl_session->client_new->seq, ssl_session->server_new->seq);
    g_free(key_block.data);
    return 0;

fail:
    g_free(key_block.data);
    return -1;
}

void
ssl_change_cipher(SslDecryptSession *ssl_session, gboolean server)
{
  ssl_debug_printf("ssl_change_cipher %s\n", (server)?"SERVER":"CLIENT");
  if (server) {
    ssl_session->server = ssl_session->server_new;
    ssl_session->server_new = NULL;
  } else {
    ssl_session->client = ssl_session->client_new;
    ssl_session->client_new = NULL;
  }
}

int
ssl_decrypt_pre_master_secret(SslDecryptSession*ssl_session,
    StringInfo* entrypted_pre_master, SSL_PRIVATE_KEY *pk)
{
    gint i;

    if(ssl_session->cipher_suite.kex!=KEX_RSA) {
        ssl_debug_printf("ssl_decrypt_pre_master_secret key %d diferent from KEX_RSA(%d)\n",
            ssl_session->cipher_suite.kex, KEX_RSA);
        return(-1);
    }

    /* with tls key loading will fail if not rsa type, so no need to check*/
    ssl_print_string("pre master encrypted",entrypted_pre_master);
    ssl_debug_printf("ssl_decrypt_pre_master_secret:RSA_private_decrypt\n");
    i=ssl_private_decrypt(entrypted_pre_master->data_len,
        entrypted_pre_master->data, pk);

    if (i!=48) {
        ssl_debug_printf("ssl_decrypt_pre_master_secret wrong "
            "pre_master_secret length (%d, expected %d)\n", i, 48);
        return -1;
    }

    /* the decrypted data has been written into the pre_master key buffer */
    ssl_session->pre_master_secret.data = entrypted_pre_master->data;
    ssl_session->pre_master_secret.data_len=48;
    ssl_print_string("pre master secret",&ssl_session->pre_master_secret);

    /* Remove the master secret if it was there.
       This force keying material regeneration in
       case we're renegotiating */
    ssl_session->state &= ~(SSL_MASTER_SECRET|SSL_HAVE_SESSION_KEY);
    return 0;
}

/* convert network byte order 32 byte number to right-aligned host byte order *
 * 8 bytes buffer */
static gint fmt_seq(guint32 num, guint8* buf)
{
    guint32 netnum;

    memset(buf,0,8);
    netnum=g_htonl(num);
    memcpy(buf+4,&netnum,4);

    return(0);
}

static gint
tls_check_mac(SslDecoder*decoder, gint ct, gint ver, guint8* data,
        guint32 datalen, guint8* mac)
{
    SSL_HMAC hm;
    gint md;
    guint32 len;
    guint8 buf[20];

    md=ssl_get_digest_by_name(digests[decoder->cipher_suite->dig-0x40]);
    ssl_debug_printf("tls_check_mac mac type:%s md %d\n",
        digests[decoder->cipher_suite->dig-0x40], md);

    ssl_hmac_init(&hm,decoder->mac_key.data,decoder->mac_key.data_len,md);

    /* hash sequence number */
    fmt_seq(decoder->seq,buf);

    decoder->seq++;

    ssl_hmac_update(&hm,buf,8);

    /* hash content type */
    buf[0]=ct;
    ssl_hmac_update(&hm,buf,1);

    /* hash version,data length and data*/
    *((gint16*)buf) = g_htons(ver);
    ssl_hmac_update(&hm,buf,2);

    *((gint16*)buf) = g_htons(datalen);
    ssl_hmac_update(&hm,buf,2);
    ssl_hmac_update(&hm,data,datalen);

    /* get digest and digest len*/
    ssl_hmac_final(&hm,buf,&len);
    ssl_print_data("Mac", buf, len);
    if(memcmp(mac,buf,len))
        return -1;

    ssl_hmac_cleanup(&hm);
    return(0);
}

int
ssl3_check_mac(SslDecoder*decoder,int ct,guint8* data,
        guint32 datalen, guint8* mac)
{
    SSL_MD mc;
    gint md;
    guint32 len;
    guint8 buf[64],dgst[20];
    gint pad_ct;

    pad_ct=(decoder->cipher_suite->dig==DIG_SHA)?40:48;

    /* get cipher used for digest comptuation */
    md=ssl_get_digest_by_name(digests[decoder->cipher_suite->dig-0x40]);
    ssl_md_init(&mc,md);

    /* do hash computation on data && padding */
    ssl_md_update(&mc,decoder->mac_key.data,decoder->mac_key.data_len);

    /* hash padding*/
    memset(buf,0x36,pad_ct);
    ssl_md_update(&mc,buf,pad_ct);

    /* hash sequence number */
    fmt_seq(decoder->seq,buf);
    decoder->seq++;
    ssl_md_update(&mc,buf,8);

    /* hash content type */
    buf[0]=ct;
    ssl_md_update(&mc,buf,1);

    /* hash data length in network byte order and data*/
    *((gint16* )buf) = g_htons(datalen);
    ssl_md_update(&mc,buf,2);
    ssl_md_update(&mc,data,datalen);

    /* get partial digest */
    ssl_md_final(&mc,dgst,&len);
    ssl_md_cleanup(&mc);

    ssl_md_init(&mc,md);

    /* hash mac key */
    ssl_md_update(&mc,decoder->mac_key.data,decoder->mac_key.data_len);

    /* hash padding and partial digest*/
    memset(buf,0x5c,pad_ct);
    ssl_md_update(&mc,buf,pad_ct);
    ssl_md_update(&mc,dgst,len);

    ssl_md_final(&mc,dgst,&len);
    ssl_md_cleanup(&mc);

    if(memcmp(mac,dgst,len))
        return -1;

    return(0);
}

#if 0
static gint
dtls_check_mac(SslDecoder*decoder, gint ct,int ver, guint8* data,
        guint32 datalen, guint8* mac)
{
    SSL_HMAC hm;
    gint md;
    guint32 len;
    guint8 buf[20];
    guint32 netnum;
    md=ssl_get_digest_by_name(digests[decoder->cipher_suite->dig-0x40]);
    ssl_debug_printf("dtls_check_mac mac type:%s md %d\n",
        digests[decoder->cipher_suite->dig-0x40], md);

    ssl_hmac_init(&hm,decoder->mac_key.data,decoder->mac_key.data_len,md);
    ssl_debug_printf("dtls_check_mac seq: %d epoch: %d\n",decoder->seq,decoder->epoch);
    /* hash sequence number */
    fmt_seq(decoder->seq,buf);
    buf[0]=decoder->epoch>>8;
    buf[1]=decoder->epoch;

    ssl_hmac_update(&hm,buf,8);

    /* hash content type */
    buf[0]=ct;
    ssl_hmac_update(&hm,buf,1);

    /* hash version,data length and data */
    *((gint16*)buf) = g_htons(ver);
    ssl_hmac_update(&hm,buf,2);

    *((gint16*)buf) = g_htons(datalen);
    ssl_hmac_update(&hm,buf,2);
    ssl_hmac_update(&hm,data,datalen);
    /* get digest and digest len */
    ssl_hmac_final(&hm,buf,&len);
    ssl_print_data("Mac", buf, len);
    if(memcmp(mac,buf,len))
        return -1;

    ssl_hmac_cleanup(&hm);
    return(0);
}
#endif


int
ssl_decompress_record(SslDecompress* decomp, const guchar* in, guint inl, StringInfo* out_str, guint* outl)
{
#ifdef HAVE_LIBZ
  gint err;
#endif

  switch (decomp->compression) {
#ifdef HAVE_LIBZ
    case 1:  /* DEFLATE */
      err = Z_OK;
      if (out_str->data_len < 16384) {  /* maximal plain length */
        ssl_data_realloc(out_str, 16384);
      }
      decomp->istream.next_in = (guchar*)in;
      decomp->istream.avail_in = inl;
      decomp->istream.next_out = out_str->data;
      decomp->istream.avail_out = out_str->data_len;
      if (inl > 0)
        err = inflate(&decomp->istream, Z_SYNC_FLUSH);
      if (err != Z_OK) {
        ssl_debug_printf("ssl_decompress_record: inflate() failed - %d\n", err);
        return -1;
      }
      *outl = out_str->data_len - decomp->istream.avail_out;
      break;
#endif  /* HAVE_LIBZ */
    default:
      ssl_debug_printf("ssl_decompress_record: unsupported compression method %d\n", decomp->compression);
      return -1;
  }
  return 0;
}

int
ssl_decrypt_record(SslDecryptSession*ssl,SslDecoder* decoder, gint ct,
        const guchar* in, guint inl, StringInfo* comp_str, StringInfo* out_str, guint* outl)
{
    guint pad, worklen, uncomplen;
    guint8 *mac;

    ssl_debug_printf("ssl_decrypt_record ciphertext len %d\n", inl);
    ssl_print_data("Ciphertext",in, inl);

    /* ensure we have enough storage space for decrypted data */
    if (inl > out_str->data_len)
    {
        ssl_debug_printf("ssl_decrypt_record: allocating %d bytes for decrypt data (old len %d)\n",
                inl + 32, out_str->data_len);
        ssl_data_realloc(out_str, inl + 32);
    }

    /* First decrypt*/
    if ((pad = ssl_cipher_decrypt(&decoder->evp, out_str->data, out_str->data_len, in, inl))!= 0) {
        ssl_debug_printf("ssl_decrypt_record failed: ssl_cipher_decrypt: %s %s\n", gcry_strsource (pad),
                    gcry_strerror (pad));
        return -1;
    }

    ssl_print_data("Plaintext", out_str->data, inl);
    worklen=inl;

    /* Now strip off the padding*/
    if(decoder->cipher_suite->block!=1) {
        pad=out_str->data[inl-1];
        worklen-=(pad+1);
        ssl_debug_printf("ssl_decrypt_record found padding %d final len %d\n",
            pad, worklen);
    }

    /* And the MAC */
    if (decoder->cipher_suite->dig_len > (gint)worklen)
    {
        ssl_debug_printf("ssl_decrypt_record wrong record len/padding outlen %d\n work %d\n",*outl, worklen);
        return -1;
    }
    worklen-=decoder->cipher_suite->dig_len;
    mac = out_str->data + worklen;

    /* if TLS 1.1 we use the transmitted IV and remove it after (to not modify dissector in others parts)*/
    if(ssl->version_netorder==TLSV1DOT1_VERSION){
	worklen=worklen-decoder->cipher_suite->block;
	memcpy(out_str->data,out_str->data+decoder->cipher_suite->block,worklen);
   }
  if(ssl->version_netorder==DTLSV1DOT0_VERSION ||
     ssl->version_netorder==DTLSV1DOT0_VERSION_NOT){
        worklen=worklen-decoder->cipher_suite->block;
	memcpy(out_str->data,out_str->data+decoder->cipher_suite->block,worklen);
   }
    /* Now check the MAC */
    ssl_debug_printf("checking mac (len %d, version %X, ct %d seq %d)\n",
        worklen, ssl->version_netorder, ct, decoder->seq);
    if(ssl->version_netorder==SSLV3_VERSION){
        if(ssl3_check_mac(decoder,ct,out_str->data,worklen,mac) < 0) {
            ssl_debug_printf("ssl_decrypt_record: mac failed\n");
            return -1;
        }
    }
    else if(ssl->version_netorder==TLSV1_VERSION || ssl->version_netorder==TLSV1DOT1_VERSION){
        if(tls_check_mac(decoder,ct,ssl->version_netorder,out_str->data,worklen,mac)< 0) {
            ssl_debug_printf("ssl_decrypt_record: mac failed\n");
            return -1;
        }
    }
    else if(ssl->version_netorder==DTLSV1DOT0_VERSION ||
	    ssl->version_netorder==DTLSV1DOT0_VERSION_NOT){
      /* follow the openssl dtls errors the rigth test is : dtls_check_mac(decoder,ct,ssl->version_netorder,out,worklen,mac)< 0 */
/* 	if(dtls_check_mac(decoder,ct,ssl->version_netorder,out_str->data,worklen,mac)< 0) { */
	if(tls_check_mac(decoder,ct,TLSV1_VERSION,out_str->data,worklen,mac)< 0) {
            ssl_debug_printf("ssl_decrypt_record: mac failed\n");
            return -1;
        }
    }
    ssl_debug_printf("ssl_decrypt_record: mac ok\n");
    *outl = worklen;

    if (decoder->compression > 0) {
      ssl_debug_printf("ssl_decrypt_record: compression method %d\n", decoder->compression);
      ssl_data_copy(comp_str, out_str);
      ssl_print_data("Plaintext compressed", comp_str->data, worklen);
      if (!decoder->decomp) {
        ssl_debug_printf("decrypt_ssl3_record: no decoder available\n");
        return -1;
      }
      if (ssl_decompress_record(decoder->decomp, comp_str->data, worklen, out_str, &uncomplen) < 0) return -1;
      ssl_print_data("Plaintext uncompressed", out_str->data, uncomplen);
      *outl = uncomplen;
    }

    return 0;
}

static void
ssl_get_version(gint* major, gint* minor, gint* patch)
{
  *major = ver_major;
  *minor = ver_minor;
  *patch = ver_patch;
}

#define RSA_PARS 6
SSL_PRIVATE_KEY*
ssl_privkey_to_sexp(struct gnutls_x509_privkey_int* priv_key)
{
    gnutls_datum_t rsa_datum[RSA_PARS]; /* m, e, d, p, q, u */
    size_t tmp_size;
    gcry_sexp_t rsa_priv_key;
    gint major, minor, patch;
    gint i;
    
#ifdef SSL_FAST
    gcry_mpi_t* rsa_params = g_malloc(sizeof(gcry_mpi_t)*RSA_PARS);
#else
    gcry_mpi_t rsa_params[RSA_PARS];
#endif

    /*
     * note: openssl and gnutls use 'p' and 'q' with opposite meaning:
     * our 'p' must be equal to 'q' as provided from openssl and viceversa
     */    

    /* RSA get parameter */
    if (gnutls_x509_privkey_export_rsa_raw(priv_key,
    	  &rsa_datum[0], &rsa_datum[1], &rsa_datum[2], &rsa_datum[4], &rsa_datum[3], &rsa_datum[5]) != 0) {
        ssl_debug_printf("ssl_load_key: can't export rsa param (is a rsa private key file ?!?)\n");
#ifdef SSL_FAST
        g_free(rsa_params);
#endif
        return NULL;
    }
    
    /* convert each rsa parameter to mpi format*/
    for(i=0; i<RSA_PARS; i++) {
      if (gcry_mpi_scan(&rsa_params[i], GCRYMPI_FMT_USG, rsa_datum[i].data, rsa_datum[i].size,&tmp_size) != 0) {
        ssl_debug_printf("ssl_load_key: can't convert m rsa param to int (size %d)\n", rsa_datum[i].size);
#ifdef SSL_FAST
        g_free(rsa_params);
#endif
        return NULL;
      }	
    }

    ssl_get_version(&major, &minor, &patch);

    /* certain versions of gnutls require swap of rsa params 'p' and 'q' */
    if ((major <= 1) && (minor <= 0) && (patch <=13))
    {
        gcry_mpi_t tmp;
        ssl_debug_printf("ssl_load_key: swapping p and q parametes\n");
        tmp = rsa_params[4];
        rsa_params[4] = rsa_params[3];
        rsa_params[3] = tmp;
    }

    if  (gcry_sexp_build( &rsa_priv_key, NULL,
            "(private-key(rsa((n%m)(e%m)(d%m)(p%m)(q%m)(u%m))))", rsa_params[0],
            rsa_params[1], rsa_params[2], rsa_params[3], rsa_params[4],
            rsa_params[5]) != 0) {
        ssl_debug_printf("ssl_load_key: can't built rsa private key s-exp\n");
#ifdef SSL_FAST
        g_free(rsa_params);
#endif        
        return NULL;
    }

#if SSL_FAST
    return rsa_params;
#else
    {
        gint i;
        for (i=0; i< 6; i++)
            gcry_mpi_release(rsa_params[i]);
    }
    return rsa_priv_key;
#endif
    
}

Ssl_private_key_t *
ssl_load_key(FILE* fp)
{
    /* gnutls make our work much harded, since we have to work internally with
     * s-exp formatted data, but PEM loader export only in "gnutls_datum"
     * format, and a datum -> s-exp convertion function does not exist.
     */
    gnutls_x509_privkey_t priv_key;
    gnutls_datum key;
    gint size;
    guint bytes;

    Ssl_private_key_t *private_key = g_malloc(sizeof(Ssl_private_key_t));
    private_key->x509_cert = 0;
    private_key->x509_pkey = 0;
    private_key->sexp_pkey = 0;
    
    /* init private key data*/
    gnutls_x509_privkey_init(&priv_key);

    /* compute file size and load all file contents into a datum buffer*/
    if (fseek(fp, 0, SEEK_END) < 0) {
        ssl_debug_printf("ssl_load_key: can't fseek file\n");
        g_free(private_key);
        return NULL;
    }
    if ((size = ftell(fp)) < 0) {
        ssl_debug_printf("ssl_load_key: can't ftell file\n");
        g_free(private_key);
        return NULL;
    }
    if (fseek(fp, 0, SEEK_SET) < 0) {
        ssl_debug_printf("ssl_load_key: can't refseek file\n");
        g_free(private_key);
        return NULL;
    }
    key.data = g_malloc(size);
    key.size = size;
    bytes = fread(key.data, 1, key.size, fp);
    if (bytes < key.size) {
        ssl_debug_printf("ssl_load_key: can't read from file %d bytes, got %d\n",
            key.size, bytes);
        g_free(private_key);
        g_free(key.data);    
        return NULL;
    }

    /* import PEM data*/
    if (gnutls_x509_privkey_import(priv_key, &key, GNUTLS_X509_FMT_PEM)!=0) {
        ssl_debug_printf("ssl_load_key: can't import pem data\n");
        g_free(private_key);
        g_free(key.data);
        return NULL;
    }
    g_free(key.data);

    private_key->x509_pkey = priv_key;
    private_key->sexp_pkey = ssl_privkey_to_sexp(priv_key);
    if ( !private_key->sexp_pkey ) {
        g_free(private_key);
        return NULL;
    } 
    return private_key;
}

const char *BAGTYPE(gnutls_pkcs12_bag_type_t x) {
  switch (x) {
    case GNUTLS_BAG_EMPTY:               return "Empty";
    case GNUTLS_BAG_PKCS8_ENCRYPTED_KEY: return "PKCS#8 Encrypted key";
    case GNUTLS_BAG_PKCS8_KEY:           return "PKCS#8 Key";
    case GNUTLS_BAG_CERTIFICATE:         return "Certificate";
    case GNUTLS_BAG_CRL:                 return "CRL";
    case GNUTLS_BAG_ENCRYPTED:           return "Encrypted";
    case GNUTLS_BAG_UNKNOWN:             return "Unknown";
    default:                             return "<undefined>";
    }
}

Ssl_private_key_t *
ssl_load_pkcs12(FILE* fp, const gchar *cert_passwd) {

  int i, j, ret, len;
  size_t rest;
  unsigned char *p;
  gnutls_datum_t data;
  gnutls_pkcs12_bag_t bag = NULL;
  gnutls_pkcs12_bag_type_t bag_type;
  size_t buf_len;
  static char buf_name[256];
  static char buf_email[128];
  unsigned char buf_keyid[32];

  gnutls_pkcs12_t       ssl_p12  = NULL;
  gnutls_x509_crt_t     ssl_cert = NULL;
  gnutls_x509_privkey_t ssl_pkey = NULL;

  Ssl_private_key_t *private_key = g_malloc(sizeof(Ssl_private_key_t));
  private_key->x509_cert = 0;
  private_key->x509_pkey = 0;
  private_key->sexp_pkey = 0;
    
  rest = 4096;
  data.data = g_malloc(rest);
  data.size = rest;
  p = data.data;
  while ((len = fread(p, 1, rest, fp)) > 0) {
    p += len;
    rest -= len;
    if (!rest) {
      rest = 1024;
      data.data = g_realloc(data.data, data.size + rest);
      p = data.data + data.size;
      data.size += rest;
    }
  }
  data.size -= rest;
  ssl_debug_printf("%d bytes read\n", data.size);
  if (!feof(fp)) {
    ssl_debug_printf( "Error during certificate reading.\n");
    g_free(private_key);
    return 0;
  }

  ret = gnutls_pkcs12_init(&ssl_p12);
  if (ret < 0) {
    ssl_debug_printf("gnutls_pkcs12_init(&st_p12) - %s", gnutls_strerror(ret));
    g_free(private_key);
    return 0;
  }
  ret = gnutls_pkcs12_import(ssl_p12, &data, GNUTLS_X509_FMT_DER, 0);
  g_free(data.data);
  if (ret < 0) {
    ssl_debug_printf("gnutls_pkcs12_import(ssl_p12, &data, GNUTLS_X509_FMT_DER, 0) - %s\n", gnutls_strerror(ret));
    g_free(private_key);
    return 0;
  }

  ssl_debug_printf( "PKCS#12 imported\n");

  for (i=0; ret==0; i++) {

    if (bag) { gnutls_pkcs12_bag_deinit(bag); bag = NULL; }

    ret = gnutls_pkcs12_bag_init(&bag);
    if (ret < 0) continue;

    ret = gnutls_pkcs12_get_bag(ssl_p12, i, bag);
    if (ret < 0) continue;

    for (j=0; ret==0 && j<gnutls_pkcs12_bag_get_count(bag); j++) {

      bag_type = gnutls_pkcs12_bag_get_type(bag, j);
      if (bag_type >= GNUTLS_BAG_UNKNOWN) continue;
      ssl_debug_printf( "Bag %d/%d: %s\n", i, j, BAGTYPE(bag_type));
      if (bag_type == GNUTLS_BAG_ENCRYPTED) {
        ret = gnutls_pkcs12_bag_decrypt(bag, cert_passwd);
        if (ret == 0) {
          bag_type = gnutls_pkcs12_bag_get_type(bag, j);
          if (bag_type >= GNUTLS_BAG_UNKNOWN) continue;
          ssl_debug_printf( "Bag %d/%d decrypted: %s\n", i, j, BAGTYPE(bag_type));
        }
        ret = 0;
      }

      ret = gnutls_pkcs12_bag_get_data(bag, j, &data);
      if (ret < 0) continue;

      switch (bag_type) {

        case GNUTLS_BAG_CERTIFICATE:

          ret = gnutls_x509_crt_init(&ssl_cert);
          if (ret < 0) {
            ssl_debug_printf( "gnutls_x509_crt_init(&ssl_cert) - %s\n", gnutls_strerror(ret));
            g_free(private_key);
            return 0;
          }

          ret = gnutls_x509_crt_import(ssl_cert, &data, GNUTLS_X509_FMT_DER);
          if (ret < 0) {
            ssl_debug_printf( "gnutls_x509_crt_import(ssl_cert, &data, GNUTLS_X509_FMT_DER) - %s\n", gnutls_strerror(ret));
            g_free(private_key);
            return 0;
          }

          buf_len = sizeof(buf_name);
          ret = gnutls_x509_crt_get_dn_by_oid(ssl_cert, GNUTLS_OID_X520_COMMON_NAME, 0, 0, buf_name, &buf_len);
          if (ret < 0) { g_strlcpy(buf_name, "<ERROR>", 256); }
          buf_len = sizeof(buf_email);
          ret = gnutls_x509_crt_get_dn_by_oid(ssl_cert, GNUTLS_OID_PKCS9_EMAIL, 0, 0, buf_email, &buf_len);
          if (ret < 0) { g_strlcpy(buf_email, "<ERROR>", 128); }

          buf_len = sizeof(buf_keyid);
          ret = gnutls_x509_crt_get_key_id(ssl_cert, 0, buf_keyid, &buf_len); 
          if (ret < 0) { g_strlcpy(buf_keyid, "<ERROR>", 32); }

          private_key->x509_cert = ssl_cert;
          ssl_debug_printf( "Certificate imported: %s <%s>, KeyID %s\n", buf_name, buf_email, bytes_to_str(buf_keyid, buf_len));
          break;

        case GNUTLS_BAG_PKCS8_KEY:
        case GNUTLS_BAG_PKCS8_ENCRYPTED_KEY:
      
          ret = gnutls_x509_privkey_init(&ssl_pkey);
          if (ret < 0) {
            ssl_debug_printf( "gnutls_x509_privkey_init(&ssl_pkey) - %s\n", gnutls_strerror(ret));
            g_free(private_key);
            return 0;
          }
          ret = gnutls_x509_privkey_import_pkcs8(ssl_pkey, &data, GNUTLS_X509_FMT_DER, cert_passwd, 
                                                 (bag_type==GNUTLS_BAG_PKCS8_KEY) ? GNUTLS_PKCS_PLAIN : 0);
          if (ret < 0) {
            ssl_debug_printf( "Can not decrypt private key - %s\n", gnutls_strerror(ret));
            g_free(private_key);
            return 0;
          }

          buf_len = sizeof(buf_keyid);
          ret = gnutls_x509_privkey_get_key_id(ssl_pkey, 0, buf_keyid, &buf_len); 
          if (ret < 0) {
            ssl_debug_printf( "gnutls_x509_privkey_get_key_id(ssl_pkey, 0, buf_keyid, &buf_len) - %s\n", gnutls_strerror(ret));
            return 0;
          }
          ssl_debug_printf( "Private key imported: KeyID %s\n", bytes_to_str(buf_keyid, buf_len));
          
          private_key->x509_pkey = ssl_pkey; 
          private_key->sexp_pkey = ssl_privkey_to_sexp(ssl_pkey);
          if ( !private_key->sexp_pkey ) {
            g_free(private_key);
            return NULL;
          } 
          break;

        default: ;
      }
    }  /* j */
  }  /* i */

  return private_key; 
}


void ssl_free_key(Ssl_private_key_t* key)
{
#if SSL_FAST
    gint i;
    for (i=0; i< 6; i++)
        gcry_mpi_release(key->sexp_pkey[i]);
#else
    gcry_sexp_release(key->sexp_pkey);
#endif

  if (!key->x509_cert)
    gnutls_x509_crt_deinit (key->x509_cert);
  
  if (!key->x509_pkey)
    gnutls_x509_privkey_deinit(key->x509_pkey);
  
  g_free((Ssl_private_key_t*)key);
}

void
ssl_lib_init(void)
{
    const gchar* str = gnutls_check_version(NULL);

    /* get library version */
    /* old relase of gnutls does not define the appropriate macros, so get
     * them from the string*/
    ssl_debug_printf("gnutls version: %s\n", str);
    sscanf(str, "%d.%d.%d", &ver_major, &ver_minor, &ver_patch);
}

#else /* HAVE_LIBGNUTLS */
/* no libgnutl: dummy operation to keep interface consistent*/
void
ssl_lib_init(void)
{
}

Ssl_private_key_t *
ssl_load_key(FILE* fp)
{
    ssl_debug_printf("ssl_load_key: impossible without glutls. fp %p\n",fp);
    return NULL;
}

Ssl_private_key_t *
ssl_load_pkcs12(FILE* fp, const gchar *cert_passwd _U_) {
    ssl_debug_printf("ssl_load_pkcs12: impossible without glutls. fp %p\n",fp);
    return NULL;
}

void
ssl_free_key(Ssl_private_key_t* key _U_)
{
}

int
ssl_find_cipher(int num,SslCipherSuite* cs)
{
    ssl_debug_printf("ssl_find_cipher: dummy without glutls. num %d cs %p\n",
        num,cs);
    return 0;
}
int
ssl_generate_keyring_material(SslDecryptSession*ssl)
{
    ssl_debug_printf("ssl_generate_keyring_material: impossible without glutls. ssl %p\n",
        ssl);
    return 0;
}
void
ssl_change_cipher(SslDecryptSession *ssl_session, gboolean server)
{
  ssl_debug_printf("ssl_change_cipher %s: makes no sence without gnutls. ssl %p\n", (server)?"SERVER":"CLIENT", ssl_session);
}

int
ssl_decrypt_pre_master_secret(SslDecryptSession* ssl_session,
    StringInfo* entrypted_pre_master, SSL_PRIVATE_KEY *pk)
{
    ssl_debug_printf("ssl_decrypt_pre_master_secret: impossible without glutls."
        " ssl %p entrypted_pre_master %p pk %p\n", ssl_session,
        entrypted_pre_master, pk);
    return 0;
}

int
ssl_decrypt_record(SslDecryptSession*ssl, SslDecoder* decoder, gint ct,
        const guchar* in, guint inl, StringInfo* comp_str _U_, StringInfo* out, guint* outl)
{
    ssl_debug_printf("ssl_decrypt_record: impossible without gnutls. ssl %p"
        "decoder %p ct %d, in %p inl %d out %p outl %p\n", ssl, decoder, ct,
        in, inl, out, outl);
    return 0;
}

gint
ssl_cipher_setiv(SSL_CIPHER_CTX *cipher _U_, guchar* iv _U_, gint iv_len _U_)
{
    ssl_debug_printf("ssl_cipher_setiv: impossible without glutls.\n");
    return 0;
}

#endif /* HAVE_LIBGNUTLS */

/* get ssl data for this session. if no ssl data is found allocate a new one*/
void
ssl_session_init(SslDecryptSession* ssl_session)
{
    ssl_debug_printf("ssl_session_init: initializing ptr %p size %lu\n",
                     (void *)ssl_session, (gulong)sizeof(SslDecryptSession));

    ssl_session->master_secret.data = ssl_session->_master_secret;
    ssl_session->session_id.data = ssl_session->_session_id;
    ssl_session->client_random.data = ssl_session->_client_random;
    ssl_session->server_random.data = ssl_session->_server_random;
    ssl_session->master_secret.data_len = 48;
    ssl_session->server_data_for_iv.data = 0;
    ssl_session->server_data_for_iv.data = ssl_session->_server_data_for_iv;
    ssl_session->client_data_for_iv.data = 0;
    ssl_session->client_data_for_iv.data = ssl_session->_client_data_for_iv;
    ssl_session->app_data_segment.data=NULL;
    ssl_session->app_data_segment.data_len=0;
}

/* Hash Functions for TLS/DTLS sessions table and private keys table*/
gint
ssl_equal (gconstpointer v, gconstpointer v2)
{
  const StringInfo *val1;
  const StringInfo *val2;
  val1 = (const StringInfo *)v;
  val2 = (const StringInfo *)v2;

  if (val1->data_len == val2->data_len &&
      !memcmp(val1->data, val2->data, val2->data_len)) {
    return 1;
  }
  return 0;
}

guint
ssl_hash  (gconstpointer v)
{
  guint l,hash;
  const StringInfo* id;
  const guint* cur;
  hash = 0;
  id = (const StringInfo*) v;
  cur = (const guint*) id->data;

  for (l=4; (l<id->data_len); l+=4, cur++)
    hash = hash ^ (*cur);

  return hash;
}

gint
ssl_private_key_equal (gconstpointer v, gconstpointer v2)
{
  const SslService *val1;
  const SslService *val2;
  val1 = (const SslService *)v;
  val2 = (const SslService *)v2;

  if ((val1->port == val2->port) &&
      ! CMP_ADDRESS(&val1->addr, &val2->addr)) {
    return 1;
  }
  return 0;
}

guint
ssl_private_key_hash  (gconstpointer v)
{
  const SslService *key;
  guint l, hash, len ;
  const guint* cur;
  key = (const SslService *)v;
  hash = key->port;
  len = key->addr.len;
  cur = (const guint*) key->addr.data;

  for (l=4; (l<len); l+=4, cur++)
    hash = hash ^ (*cur);

  return hash;
}

/* private key table entries have a scope 'larger' then packet capture,
 * so we can't relay on se_alloc** function */
void
ssl_private_key_free(gpointer id, gpointer key, gpointer dummy _U_)
{
  g_free(id);
  ssl_free_key((Ssl_private_key_t*) key);
}

/* handling of association between tls/dtls ports and clear text protocol */
void
ssl_association_add(GTree* associations, dissector_handle_t handle, guint port, const gchar *protocol, gboolean tcp, gboolean from_key_list)
{

  SslAssociation* assoc;
  assoc = g_malloc(sizeof(SslAssociation));

  assoc->tcp = tcp;
  assoc->ssl_port = port;
  assoc->info=g_malloc(strlen(protocol)+1);
  g_strlcpy(assoc->info, protocol, strlen(protocol)+1);
  assoc->handle = find_dissector(protocol);
  assoc->from_key_list = from_key_list;

  ssl_debug_printf("association_add %s port %d protocol %s handle %p\n",
		   (assoc->tcp)?"TCP":"UDP", port, protocol, (void *)(assoc->handle));


  if (!assoc->handle) {
    ssl_debug_printf("association_add could not find handle for protocol '%s', try to find 'data' dissector\n", protocol);
    assoc->handle = find_dissector("data");
  }

  if(!assoc->handle){
    fprintf(stderr, "association_add() could not find handle for protocol:%s\n",protocol);
  } else {
    if(port) { 
      if(tcp)
	dissector_add("tcp.port", port, handle);
      else
	dissector_add("udp.port", port, handle);
    }
    g_tree_insert(associations, assoc, assoc);
  }
}

void
ssl_association_remove(GTree* associations, SslAssociation *assoc)
{
  ssl_debug_printf("ssl_association_remove removing %s %u - %s handle %p\n",
		   (assoc->tcp)?"TCP":"UDP", assoc->ssl_port, assoc->info, (void *)(assoc->handle));
  if (assoc->handle)
    dissector_delete((assoc->tcp)?"tcp.port":"udp.port", assoc->ssl_port, assoc->handle);

  g_tree_remove(associations, assoc);
  g_free(assoc);
}

gint
ssl_association_cmp(gconstpointer a, gconstpointer b)
{
  const SslAssociation *assoc_a=a, *assoc_b=b;
  if (assoc_a->tcp != assoc_b->tcp) return (assoc_a->tcp)?1:-1;
  return assoc_a->ssl_port - assoc_b->ssl_port;
}

SslAssociation*
ssl_association_find(GTree * associations, guint port, gboolean tcp)
{
  register SslAssociation* ret;
  SslAssociation assoc_tmp;

  assoc_tmp.tcp = tcp;
  assoc_tmp.ssl_port = port;
  ret = g_tree_lookup(associations, &assoc_tmp);

  ssl_debug_printf("association_find: %s port %d found %p\n", (tcp)?"TCP":"UDP", port, (void *)ret);
  return ret;
}

gint
ssl_assoc_from_key_list(gpointer key _U_, gpointer data, gpointer user_data)
{
  if (((SslAssociation*)data)->from_key_list)
    ep_stack_push((ep_stack_t)user_data, data);
  return FALSE;
}

int
ssl_packet_from_server(GTree* associations, guint port, gboolean tcp)
{
  register gint ret;
  ret = ssl_association_find(associations, port, tcp) != 0;

  ssl_debug_printf("packet_from_server: is from server - %s\n", (ret)?"TRUE":"FALSE");
  return ret;
}

/* add to packet data a newly allocated tvb with the specified real data*/
void
ssl_add_record_info(gint proto, packet_info *pinfo, guchar* data, gint data_len, gint record_id)
{
  guchar* real_data;
  SslRecordInfo* rec;
  SslPacketInfo* pi;
  real_data = se_alloc(data_len);
  rec = se_alloc(sizeof(SslRecordInfo));
  pi = p_get_proto_data(pinfo->fd, proto);

  if (!pi)
    {
      pi = se_alloc0(sizeof(SslPacketInfo));
      p_add_proto_data(pinfo->fd, proto,pi);
    }

  rec->id = record_id;
  rec->tvb = tvb_new_real_data(real_data, data_len, data_len);
  memcpy(real_data, data, data_len);

  /* head insertion */
  rec->next= pi->handshake_data;
  pi->handshake_data = rec;
}


/* search in packet data the tvbuff associated to the specified id */
tvbuff_t*
ssl_get_record_info(int proto, packet_info *pinfo, gint record_id)
{
  SslRecordInfo* rec;
  SslPacketInfo* pi;
  pi = p_get_proto_data(pinfo->fd, proto);

  if (!pi)
    return NULL;

  for (rec = pi->handshake_data; rec; rec = rec->next)
    if (rec->id == record_id)
      return rec->tvb;

  return NULL;
}

void
ssl_add_data_info(gint proto, packet_info *pinfo, guchar* data, gint data_len, gint key, SslFlow *flow)
{
  SslDataInfo *rec, **prec;
  SslPacketInfo *pi;

  pi = p_get_proto_data(pinfo->fd, proto);
  if (!pi)
    {
      pi = se_alloc0(sizeof(SslPacketInfo));
      p_add_proto_data(pinfo->fd, proto,pi);
    }

  rec = se_alloc(sizeof(SslDataInfo)+data_len);
  rec->key = key;
  rec->plain_data.data = (guchar*)(rec + 1);
  memcpy(rec->plain_data.data, data, data_len);
  rec->plain_data.data_len = data_len;
  rec->seq = flow->byte_seq;
  rec->nxtseq = flow->byte_seq + data_len;
  rec->flow = flow;
  rec->next = NULL;

  flow->byte_seq += data_len;

  /* insertion */
  prec = &pi->appl_data;
  while (*prec) prec = &(*prec)->next;
  *prec = rec;

  ssl_debug_printf("ssl_add_data_info: new data inserted data_len = %d, seq = %u, nxtseq = %u\n",
                   rec->plain_data.data_len, rec->seq, rec->nxtseq);
}

SslDataInfo*
ssl_get_data_info(int proto, packet_info *pinfo, gint key)
{
  SslDataInfo* rec;
  SslPacketInfo* pi;
  pi = p_get_proto_data(pinfo->fd, proto);

  if (!pi) return NULL;

  rec = pi->appl_data;
  while (rec) {
    if (rec->key == key) return rec;
    rec = rec->next;
  }

  return NULL;
}

/* initialize/reset per capture state data (ssl sessions cache) */
void
ssl_common_init(GHashTable **session_hash, StringInfo *decrypted_data, StringInfo *compressed_data)
{
  if (*session_hash)
    g_hash_table_destroy(*session_hash);
  *session_hash = g_hash_table_new(ssl_hash, ssl_equal);

  if (decrypted_data->data)
    g_free(decrypted_data->data);
  ssl_data_alloc(decrypted_data, 32);

  if (compressed_data->data)
    g_free(compressed_data->data);
  ssl_data_alloc(compressed_data, 32);
}

/* parse ssl related preferences (private keys and ports association strings) */
void
ssl_parse_key_list(const gchar * keys_list, GHashTable *key_hash, GTree* associations, dissector_handle_t handle, gboolean tcp)
{
  gchar* end;
  gchar* start;
  gchar* tmp;
  guchar* ip;
  SslService* service;
  Ssl_private_key_t * private_key, *tmp_private_key;
  FILE* fp;

  start = g_strdup(keys_list);
  tmp = start;
  ssl_debug_printf("ssl_init keys string:\n%s\n", start);
  do {
    int read_index, write_index;
    gchar* addr, *port, *protocol, *filename, *cert_passwd;

    addr = start;
    /* split ip/file couple with ';' separator*/
    end = strpbrk(start, ";\n\r");
    if (end) {
      *end = 0;
      start = end+1;
    }

    /* skip comments (in file) */
    if (addr[0] == '#') continue;

    /* for each entry split ip, port, protocol, filename with ',' separator */
    ssl_debug_printf("ssl_init found host entry %s\n", addr);
    port = strchr(addr, ',');
    if (!port)
      {
	ssl_debug_printf("ssl_init entry malformed can't find port in '%s'\n", addr);
	continue;
      }
    *port = 0;
    port++;

    protocol = strchr(port,',');
    if (!protocol)
      {
	ssl_debug_printf("ssl_init entry malformed can't find protocol in %s\n", port);
	continue;
      }
    *protocol=0;
    protocol++;

    filename = strchr(protocol,',');
    if (!filename)
    {
	    ssl_debug_printf("ssl_init entry malformed can't find filename in %s\n", protocol);
	    continue;
    }
    *filename=0;
    filename++;
    
    cert_passwd = strchr(filename,',');
    if (cert_passwd)
    {
	    *cert_passwd=0;
      cert_passwd++;  
    }
    
    /* convert ip and port string to network rappresentation*/
    service = g_malloc(sizeof(SslService) + 4);
    service->addr.type = AT_IPv4;
    service->addr.len = 4;
    service->addr.data = ip = ((guchar*)service) + sizeof(SslService);
    
    /* remove all spaces in addr */
    read_index = 0;
    write_index = 0;
    
    while(addr[read_index]) {
      if (addr[read_index] != ' ') {
      	addr[write_index] = addr[read_index];
        write_index++;
      }  
      read_index++;	
    }
    addr[write_index] = 0;
    
    if ( !strcmp("any", addr) || !strcmp("ANY", addr) ) {
      ip[0] = 0;
      ip[1] = 0;
      ip[2] = 0;
      ip[3] = 0;
    } else {
      sscanf(addr, "%hhu.%hhu.%hhu.%hhu", &ip[0], &ip[1], &ip[2], &ip[3]);
    }

    if(!strcmp("start_tls", port)) {
      service->port = 0;
    } else {
      service->port = atoi(port);
    }
    ssl_debug_printf("ssl_init addr '%hhu.%hhu.%hhu.%hhu' port '%d' filename '%s' password(only for p12 file) '%s'\n",
		     ip[0], ip[1], ip[2], ip[3], service->port, filename, cert_passwd);

    /* try to load pen or p12 file*/
    fp = eth_fopen(filename, "rb");
    if (!fp) {
      fprintf(stderr, "can't open file %s \n",filename);
      continue;
    }
    
    if (!cert_passwd) {
      private_key = ssl_load_key(fp);
    }  
    else  
    {	
      private_key = ssl_load_pkcs12(fp,cert_passwd);
    }
    /* !!! */
    if (!private_key) {
      fprintf(stderr,"can't load private key from %s\n",
	      filename);
      continue;
    }
        
    fclose(fp);

    ssl_debug_printf("ssl_init private key file %s successfully loaded\n",filename);
    
    /* if item exists, remove first */
    tmp_private_key = g_hash_table_lookup(key_hash, service);
    if (tmp_private_key) {
      g_hash_table_remove(key_hash, service);
      ssl_free_key(tmp_private_key);
    } 
    g_hash_table_insert(key_hash, service, private_key);

    ssl_association_add(associations, handle, service->port, protocol, tcp, TRUE);

  } while (end != NULL);
  g_free(tmp);
}

/* store master secret into session data cache */
void
ssl_save_session(SslDecryptSession* ssl, GHashTable *session_hash)
{
  /* allocate stringinfo chunks for session id and master secret data*/
  StringInfo* session_id;
  StringInfo* master_secret;
  session_id = se_alloc0(sizeof(StringInfo) + ssl->session_id.data_len);
  master_secret = se_alloc0(48 + sizeof(StringInfo));

  master_secret->data = ((guchar*)master_secret+sizeof(StringInfo));
  session_id->data = ((guchar*)session_id+sizeof(StringInfo));

  ssl_data_set(session_id, ssl->session_id.data, ssl->session_id.data_len);
  ssl_data_set(master_secret, ssl->master_secret.data, ssl->master_secret.data_len);
  g_hash_table_insert(session_hash, session_id, master_secret);
  ssl_print_string("ssl_save_session stored session id", session_id);
  ssl_print_string("ssl_save_session stored master secret", master_secret);
}

void
ssl_restore_session(SslDecryptSession* ssl, GHashTable *session_hash)
{
  StringInfo* ms;
  ms = g_hash_table_lookup(session_hash, &ssl->session_id);

  if (!ms) {
    ssl_debug_printf("ssl_restore_session can't find stored session\n");
    return;
  }
  ssl_data_set(&ssl->master_secret, ms->data, ms->data_len);
  ssl->state |= SSL_MASTER_SECRET;
  ssl_debug_printf("ssl_restore_session master key retrived\n");
}

int
ssl_is_valid_content_type(guint8 type)
{
  if (type >= 0x14 && type <= 0x17)
    {
      return 1;
    }

  return 0;
}

#ifdef SSL_DECRYPT_DEBUG

static FILE* ssl_debug_file=NULL;

void
ssl_set_debug(char* name)
{
    static gint debug_file_must_be_closed;
    gint use_stderr;
    debug_file_must_be_closed = 0;
    use_stderr = name?(strcmp(name, SSL_DEBUG_USE_STDERR) == 0):0;

    if (debug_file_must_be_closed)
        fclose(ssl_debug_file);
    if (use_stderr)
        ssl_debug_file = stderr;
    else if (!name || (strcmp(name, "") ==0))
        ssl_debug_file = NULL;
    else
        ssl_debug_file = eth_fopen(name, "w");
    if (!use_stderr && ssl_debug_file)
        debug_file_must_be_closed = 1;
}

void
ssl_debug_flush(void)
{
  if (ssl_debug_file)
    fflush(ssl_debug_file);
}

void
ssl_debug_printf(const gchar* fmt, ...)
{
    va_list ap;
    gint ret;
    ret=0;

    if (!ssl_debug_file)
        return;

    va_start(ap, fmt);
    ret += vfprintf(ssl_debug_file, fmt, ap);
    va_end(ap);
}

void
ssl_print_text_data(const gchar* name, const guchar* data, gint len)
{
    gint i;
    if (!ssl_debug_file)
        return;
    fprintf(ssl_debug_file,"%s: ",name);
    for (i=0; i< len; i++) {
      fprintf(ssl_debug_file,"%c",data[i]);
    }
    fprintf(ssl_debug_file,"\n");
}

void
ssl_print_data(const gchar* name, const guchar* data, gint len)
{
    gint i;
    if (!ssl_debug_file)
        return;
    fprintf(ssl_debug_file,"%s[%d]:\n",name, len);
    for (i=0; i< len; i++) {
        if ((i>0) && (i%16 == 0))
            fprintf(ssl_debug_file,"\n");
        fprintf(ssl_debug_file,"%.2x ",data[i]&255);
    }
    fprintf(ssl_debug_file,"\n");
}

void
ssl_print_string(const gchar* name, const StringInfo* data)
{
    ssl_print_data(name, data->data, data->data_len);
}
#endif /* SSL_DECRYPT_DEBUG */