1a768b36b4
From Marc Petit-Huguenin: - Removed directResponseForwarding. - The certificate_type enum is now defined as RFC 6091's CertificateType so moved the definition to packet-ssl-utils.[ch]. - Fixed invalid values for CERTIFICATE_BY_NODE and CERTIFICATE_BY_USER Kinds. https://bugs.wireshark.org/bugzilla/show_bug.cgi?id=5967 svn path=/trunk/; revision=37452
571 lines
18 KiB
C
571 lines
18 KiB
C
/* packet-ssl-utils.h
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* ssl manipulation functions
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* By Paolo Abeni <paolo.abeni@email.com>
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*
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* $Id$
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*
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* Wireshark - Network traffic analyzer
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* By Gerald Combs <gerald@wireshark.org>
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* Copyright 1998 Gerald Combs
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*
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* This program is free software; you can redistribute it and/or
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* modify it under the terms of the GNU General Public License
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* as published by the Free Software Foundation; either version 2
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* of the License, or (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program; if not, write to the Free Software
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* Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
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*/
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#ifndef __SSL_UTILS_H_
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#define __SSL_UTILS_H_
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#include <glib.h>
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#include <epan/packet.h>
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#include <epan/emem.h>
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#include <epan/value_string.h>
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#include <stdio.h>
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#ifdef HAVE_LIBGNUTLS
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#include <gcrypt.h>
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#include <gnutls/x509.h>
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#include <gnutls/pkcs12.h>
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#include <epan/conversation.h>
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/* #define SSL_FAST 1 */
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#define SSL_DECRYPT_DEBUG
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#define SSL_CIPHER_CTX gcry_cipher_hd_t
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#define SSL_PSK_KEY guchar
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#ifdef SSL_FAST
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#define SSL_PRIVATE_KEY gcry_mpi_t
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#else /* SSL_FAST */
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#define SSL_PRIVATE_KEY struct gcry_sexp
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#endif /* SSL_FAST */
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#else /* HAVE_LIBGNUTLS */
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#define SSL_CIPHER_CTX void*
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#define SSL_PRIVATE_KEY void
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#define SSL_PSK_KEY void
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#endif /* HAVE_LIBGNUTLS */
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/* version state tables */
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#define SSL_VER_UNKNOWN 0
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#define SSL_VER_SSLv2 1
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#define SSL_VER_SSLv3 2
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#define SSL_VER_TLS 3
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#define SSL_VER_TLSv1DOT1 4
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#define SSL_VER_DTLS 5
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#define SSL_VER_PCT 6
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#define SSL_VER_TLSv1DOT2 7
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/* other defines */
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#define SSL_ID_CHG_CIPHER_SPEC 0x14
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#define SSL_ID_ALERT 0x15
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#define SSL_ID_HANDSHAKE 0x16
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#define SSL_ID_APP_DATA 0x17
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#define SSL_HND_HELLO_REQUEST 0
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#define SSL_HND_CLIENT_HELLO 1
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#define SSL_HND_SERVER_HELLO 2
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#define SSL_HND_HELLO_VERIFY_REQUEST 3
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#define SSL_HND_CERTIFICATE 11
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#define SSL_HND_SERVER_KEY_EXCHG 12
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#define SSL_HND_CERT_REQUEST 13
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#define SSL_HND_SVR_HELLO_DONE 14
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#define SSL_HND_CERT_VERIFY 15
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#define SSL_HND_CLIENT_KEY_EXCHG 16
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#define SSL_HND_FINISHED 20
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#define SSL_HND_CERT_STATUS 22
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#define SSL2_HND_ERROR 0x00
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#define SSL2_HND_CLIENT_HELLO 0x01
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#define SSL2_HND_CLIENT_MASTER_KEY 0x02
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#define SSL2_HND_CLIENT_FINISHED 0x03
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#define SSL2_HND_SERVER_HELLO 0x04
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#define SSL2_HND_SERVER_VERIFY 0x05
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#define SSL2_HND_SERVER_FINISHED 0x06
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#define SSL2_HND_REQUEST_CERTIFICATE 0x07
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#define SSL2_HND_CLIENT_CERTIFICATE 0x08
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#define PCT_VERSION_1 0x8001
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#define PCT_MSG_CLIENT_HELLO 0x01
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#define PCT_MSG_SERVER_HELLO 0x02
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#define PCT_MSG_CLIENT_MASTER_KEY 0x03
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#define PCT_MSG_SERVER_VERIFY 0x04
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#define PCT_MSG_ERROR 0x05
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#define PCT_CH_OFFSET_V1 0xa
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#define PCT_CIPHER_DES 0x01
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#define PCT_CIPHER_IDEA 0x02
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#define PCT_CIPHER_RC2 0x03
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#define PCT_CIPHER_RC4 0x04
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#define PCT_CIPHER_DES_112 0x05
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#define PCT_CIPHER_DES_168 0x06
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#define PCT_HASH_MD5 0x0001
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#define PCT_HASH_MD5_TRUNC_64 0x0002
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#define PCT_HASH_SHA 0x0003
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#define PCT_HASH_SHA_TRUNC_80 0x0004
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#define PCT_HASH_DES_DM 0x0005
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#define PCT_CERT_NONE 0x00
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#define PCT_CERT_X509 0x01
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#define PCT_CERT_PKCS7 0x02
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#define PCT_SIG_NONE 0x0000
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#define PCT_SIG_RSA_MD5 0x0001
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#define PCT_SIG_RSA_SHA 0x0002
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#define PCT_SIG_DSA_SHA 0x0003
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#define PCT_EXCH_RSA_PKCS1 0x01
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#define PCT_EXCH_RSA_PKCS1_TOKEN_DES 0x02
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#define PCT_EXCH_RSA_PKCS1_TOKEN_DES3 0x03
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#define PCT_EXCH_RSA_PKCS1_TOKEN_RC2 0x04
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#define PCT_EXCH_RSA_PKCS1_TOKEN_RC4 0x05
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#define PCT_EXCH_DH_PKCS3 0x06
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#define PCT_EXCH_DH_PKCS3_TOKEN_DES 0x07
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#define PCT_EXCH_DH_PKCS3_TOKEN_DES3 0x08
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#define PCT_EXCH_FORTEZZA_TOKEN 0x09
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#define PCT_ERR_BAD_CERTIFICATE 0x01
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#define PCT_ERR_CLIENT_AUTH_FAILED 0x02
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#define PCT_ERR_ILLEGAL_MESSAGE 0x03
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#define PCT_ERR_INTEGRITY_CHECK_FAILED 0x04
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#define PCT_ERR_SERVER_AUTH_FAILED 0x05
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#define PCT_ERR_SPECS_MISMATCH 0x06
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#define SSL_HND_HELLO_EXT_ELLIPTIC_CURVES 0x000a
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#define SSL_HND_HELLO_EXT_EC_POINT_FORMATS 0x000b
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#define SSL_HND_CERT_STATUS_TYPE_OCSP 1
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/*
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* Lookup tables
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*/
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extern const value_string ssl_version_short_names[];
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extern const value_string ssl_20_msg_types[];
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extern value_string_ext ssl_20_cipher_suites_ext;
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extern const value_string ssl_20_certificate_type[];
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extern const value_string ssl_31_content_type[];
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extern const value_string ssl_versions[];
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extern const value_string ssl_31_change_cipher_spec[];
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extern const value_string ssl_31_alert_level[];
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extern const value_string ssl_31_alert_description[];
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extern const value_string ssl_31_handshake_type[];
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extern const value_string ssl_31_compression_method[];
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extern const value_string ssl_31_key_exchange_algorithm[];
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extern const value_string ssl_31_signature_algorithm[];
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extern const value_string ssl_31_client_certificate_type[];
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extern const value_string ssl_31_public_value_encoding[];
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extern value_string_ext ssl_31_ciphersuite_ext;
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extern const value_string pct_msg_types[];
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extern const value_string pct_cipher_type[];
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extern const value_string pct_hash_type[];
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extern const value_string pct_cert_type[];
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extern const value_string pct_sig_type[];
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extern const value_string pct_exch_type[];
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extern const value_string pct_error_code[];
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extern const value_string tls_hello_extension_types[];
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extern const value_string tls_hash_algorithm[];
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extern const value_string tls_signature_algorithm[];
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extern const value_string tls_certificate_type[];
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extern const value_string tls_cert_status_type[];
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extern const value_string ssl_extension_curves[];
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extern const value_string ssl_extension_ec_point_formats[];
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/* XXX Should we use GByteArray instead? */
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typedef struct _StringInfo {
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guchar* data;
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guint data_len;
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} StringInfo;
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#define SSL_WRITE_KEY 1
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#define SSLV3_VERSION 0x300
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#define TLSV1_VERSION 0x301
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#define TLSV1DOT1_VERSION 0x302
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#define TLSV1DOT2_VERSION 0x303
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#define DTLSV1DOT0_VERSION 0xfeff
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#define DTLSV1DOT0_VERSION_NOT 0x100
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#define SSL_CLIENT_RANDOM (1<<0)
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#define SSL_SERVER_RANDOM (1<<1)
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#define SSL_CIPHER (1<<2)
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#define SSL_HAVE_SESSION_KEY (1<<3)
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#define SSL_VERSION (1<<4)
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#define SSL_MASTER_SECRET (1<<5)
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#define SSL_PRE_MASTER_SECRET (1<<6)
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#define SSL_CIPHER_MODE_STREAM 0
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#define SSL_CIPHER_MODE_CBC 1
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#define SSL_DEBUG_USE_STDERR "-"
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#define SSLV2_MAX_SESSION_ID_LENGTH_IN_BYTES 16
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typedef struct _SslCipherSuite {
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gint number;
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gint kex;
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gint sig;
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gint enc;
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gint block;
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gint bits;
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gint eff_bits;
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gint dig;
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gint dig_len;
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gint export;
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gint mode;
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} SslCipherSuite;
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typedef struct _SslFlow {
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guint32 byte_seq;
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guint16 flags;
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emem_tree_t *multisegment_pdus;
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} SslFlow;
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typedef struct _SslDecompress SslDecompress;
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typedef struct _SslDecoder {
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SslCipherSuite* cipher_suite;
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gint compression;
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guchar _mac_key[20];
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StringInfo mac_key;
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SSL_CIPHER_CTX evp;
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SslDecompress *decomp;
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guint32 seq;
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guint16 epoch;
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SslFlow *flow;
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} SslDecoder;
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#define KEX_RSA 0x10
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#define KEX_DH 0x11
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#define KEX_PSK 0x12
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#define SIG_RSA 0x20
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#define SIG_DSS 0x21
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#define SIG_NONE 0x22
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#define ENC_DES 0x30
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#define ENC_3DES 0x31
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#define ENC_RC4 0x32
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#define ENC_RC2 0x33
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#define ENC_IDEA 0x34
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#define ENC_AES 0x35
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#define ENC_AES256 0x36
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#define ENC_NULL 0x37
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#define DIG_MD5 0x40
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#define DIG_SHA 0x41
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struct tvbuff;
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typedef struct _SslRecordInfo {
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struct tvbuff* tvb;
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gint id;
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struct _SslRecordInfo* next;
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} SslRecordInfo;
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typedef struct _SslDataInfo {
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gint key;
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StringInfo plain_data;
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guint32 seq;
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guint32 nxtseq;
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SslFlow *flow;
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struct _SslDataInfo *next;
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} SslDataInfo;
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typedef struct {
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SslDataInfo *appl_data;
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SslRecordInfo* handshake_data;
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} SslPacketInfo;
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typedef struct _SslDecryptSession {
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guchar _master_secret[48];
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guchar _session_id[256];
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guchar _client_random[32];
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guchar _server_random[32];
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StringInfo session_id;
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StringInfo server_random;
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StringInfo client_random;
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StringInfo master_secret;
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/* the data store for this StringInfo must be allocated explicitly with a capture lifetime scope */
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StringInfo pre_master_secret;
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guchar _server_data_for_iv[24];
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StringInfo server_data_for_iv;
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guchar _client_data_for_iv[24];
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StringInfo client_data_for_iv;
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gint cipher;
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gint compression;
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gint state;
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SslCipherSuite cipher_suite;
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SslDecoder *server;
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SslDecoder *client;
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SslDecoder *server_new;
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SslDecoder *client_new;
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SSL_PRIVATE_KEY* private_key;
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SSL_PSK_KEY* psk;
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guint32 version;
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guint16 version_netorder;
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StringInfo app_data_segment;
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address srv_addr;
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port_type srv_ptype;
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guint srv_port;
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} SslDecryptSession;
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typedef struct _SslAssociation {
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gboolean tcp;
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guint ssl_port;
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dissector_handle_t handle;
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gchar* info;
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gboolean from_key_list;
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} SslAssociation;
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typedef struct _SslService {
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address addr;
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guint port;
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} SslService;
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typedef struct _Ssl_private_key {
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#ifdef HAVE_LIBGNUTLS
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gnutls_x509_crt_t x509_cert;
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gnutls_x509_privkey_t x509_pkey;
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#endif
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SSL_PRIVATE_KEY *sexp_pkey;
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} Ssl_private_key_t;
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/* User Access Table */
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typedef struct _ssldecrypt_assoc_t {
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char* ipaddr;
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char* port;
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char* protocol;
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char* keyfile;
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char* password;
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} ssldecrypt_assoc_t;
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gboolean ssldecrypt_uat_fld_ip_chk_cb(void*, const char*, unsigned, const void*, const void*, const char** err);
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gboolean ssldecrypt_uat_fld_port_chk_cb(void*, const char*, unsigned, const void*, const void*, const char** err);
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gboolean ssldecrypt_uat_fld_protocol_chk_cb(void*, const char*, unsigned, const void*, const void*, const char** err);
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gboolean ssldecrypt_uat_fld_fileopen_chk_cb(void*, const char*, unsigned, const void*, const void*, const char** err);
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gboolean ssldecrypt_uat_fld_password_chk_cb(void*, const char*, unsigned, const void*, const void*, const char** err);
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/** Initialize decryption engine/ssl layer. To be called once per execution */
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extern void
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ssl_lib_init(void);
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/** Initialize an ssl session struct
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@param ssl pointer to ssl session struct to be initialized */
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extern void
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ssl_session_init(SslDecryptSession* ssl);
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/** Set server address and port */
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extern void
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ssl_set_server(SslDecryptSession* ssl, address *addr, port_type ptype, guint32 port);
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/** set the data and len for the stringInfo buffer. buf should be big enough to
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* contain the provided data
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@param buf the buffer to update
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@param src the data source
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@param len the source data len */
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extern void
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ssl_data_set(StringInfo* buf, const guchar* src, guint len);
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extern gint
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ssl_cipher_setiv(SSL_CIPHER_CTX *cipher, guchar* iv, gint iv_len);
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/** Load an RSA private key from specified file
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@param fp the file that contain the key data
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@return a pointer to the loaded key on success, or NULL */
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extern Ssl_private_key_t *
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ssl_load_key(FILE* fp);
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extern Ssl_private_key_t *
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ssl_load_pkcs12(FILE* fp, const gchar *cert_passwd);
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/** Deallocate the memory used for specified key
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@param key pointer to the key to be freed */
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extern void
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ssl_free_key(Ssl_private_key_t* key);
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/* Find private key in associations */
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extern gint
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ssl_find_private_key(SslDecryptSession *ssl_session, GHashTable *key_hash, GTree* associations, packet_info *pinfo);
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/** Search for the specified cipher souite id
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@param num the id of the cipher suite to be searched
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@param cs pointer to the cipher suite struct to be filled
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@return 0 if the cipher suite is found, -1 elsewhere */
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extern gint
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ssl_find_cipher(int num,SslCipherSuite* cs);
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/** Expand the pre_master_secret to generate all the session information
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* (master secret, session keys, ivs)
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@param ssl_session the store for all the session data
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@return 0 on success */
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extern gint
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ssl_generate_keyring_material(SslDecryptSession*ssl_session);
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extern void
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ssl_change_cipher(SslDecryptSession *ssl_session, gboolean server);
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/** Try to find the pre-master secret for the given encrypted pre-master secret
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from a log of secrets.
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@param ssl_session the store for the decrypted pre_master_secret
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@param ssl_keylog_filename a file that contains a log of pre-master secrets
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@param encrypted_pre_master the rsa encrypted pre_master_secret
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@return 0 on success */
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int
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ssl_keylog_lookup(SslDecryptSession* ssl_session,
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const gchar* ssl_keylog_filename,
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StringInfo* encrypted_pre_master);
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/** Try to decrypt in place the encrypted pre_master_secret
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@param ssl_session the store for the decrypted pre_master_secret
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@param encrypted_pre_master the rsa encrypted pre_master_secret
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@param pk the private key to be used for decryption
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@return 0 on success */
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extern gint
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ssl_decrypt_pre_master_secret(SslDecryptSession*ssl_session,
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StringInfo* encrypted_pre_master, SSL_PRIVATE_KEY *pk);
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/** Try to decrypt an ssl record
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@param ssl ssl_session the store all the session data
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@param decoder the stream decoder to be used
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@param ct the content type of this ssl record
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@param in a pinter to the ssl record to be decrypted
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@param inl the record length
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@param comp_str
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@param out_str a pointer to the store for the decrypted data
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@param outl the decrypted data len
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@return 0 on success */
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extern gint
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ssl_decrypt_record(SslDecryptSession* ssl,SslDecoder* decoder, gint ct,
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const guchar* in, guint inl, StringInfo* comp_str, StringInfo* out_str, guint* outl);
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/* Common part bitween SSL and DTLS dissectors */
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/* Hash Functions for TLS/DTLS sessions table and private keys table */
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extern gint
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ssl_equal (gconstpointer v, gconstpointer v2);
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extern guint
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ssl_hash (gconstpointer v);
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extern gint
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ssl_private_key_equal (gconstpointer v, gconstpointer v2);
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extern guint
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ssl_private_key_hash (gconstpointer v);
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|
|
/* private key table entries have a scope 'larger' then packet capture,
|
|
* so we can't relay on se_alloc** function */
|
|
extern void
|
|
ssl_private_key_free(gpointer id, gpointer key, gpointer dummy _U_);
|
|
|
|
/* handling of association between tls/dtls ports and clear text protocol */
|
|
extern void
|
|
ssl_association_add(GTree* associations, dissector_handle_t handle, guint port, const gchar *protocol, gboolean tcp, gboolean from_key_list);
|
|
|
|
extern void
|
|
ssl_association_remove(GTree* associations, SslAssociation *assoc);
|
|
|
|
extern gint
|
|
ssl_association_cmp(gconstpointer a, gconstpointer b);
|
|
|
|
extern SslAssociation*
|
|
ssl_association_find(GTree * associations, guint port, gboolean tcp);
|
|
|
|
extern gint
|
|
ssl_assoc_from_key_list(gpointer key _U_, gpointer data, gpointer user_data);
|
|
|
|
extern gint
|
|
ssl_packet_from_server(SslDecryptSession* ssl, GTree* associations, packet_info *pinfo);
|
|
|
|
/* add to packet data a newly allocated tvb with the specified real data*/
|
|
extern void
|
|
ssl_add_record_info(gint proto, packet_info *pinfo, guchar* data, gint data_len, gint record_id);
|
|
|
|
/* search in packet data the tvbuff associated to the specified id */
|
|
extern tvbuff_t*
|
|
ssl_get_record_info(gint proto, packet_info *pinfo, gint record_id);
|
|
|
|
void
|
|
ssl_add_data_info(gint proto, packet_info *pinfo, guchar* data, gint data_len, gint key, SslFlow *flow);
|
|
|
|
SslDataInfo*
|
|
ssl_get_data_info(int proto, packet_info *pinfo, gint key);
|
|
|
|
/* initialize/reset per capture state data (ssl sessions cache) */
|
|
extern void
|
|
ssl_common_init(GHashTable **session_hash, StringInfo *decrypted_data, StringInfo *compressed_data);
|
|
|
|
/* parse ssl related preferences (private keys and ports association strings) */
|
|
extern void
|
|
ssl_parse_key_list(const ssldecrypt_assoc_t * uats, GHashTable *key_hash, GTree* associations, dissector_handle_t handle, gboolean tcp);
|
|
|
|
/* store master secret into session data cache */
|
|
extern void
|
|
ssl_save_session(SslDecryptSession* ssl, GHashTable *session_hash);
|
|
|
|
extern void
|
|
ssl_restore_session(SslDecryptSession* ssl, GHashTable *session_hash);
|
|
|
|
extern gint
|
|
ssl_is_valid_content_type(guint8 type);
|
|
|
|
#ifdef SSL_DECRYPT_DEBUG
|
|
extern void
|
|
ssl_debug_printf(const gchar* fmt,...) G_GNUC_PRINTF(1,2);
|
|
extern void
|
|
ssl_print_data(const gchar* name, const guchar* data, size_t len);
|
|
extern void
|
|
ssl_print_string(const gchar* name, const StringInfo* data);
|
|
extern void
|
|
ssl_print_text_data(const gchar* name, const guchar* data, size_t len);
|
|
extern void
|
|
ssl_set_debug(gchar* name);
|
|
extern void
|
|
ssl_debug_flush(void);
|
|
#else
|
|
|
|
/* No debug: nullify debug operation*/
|
|
static inline void G_GNUC_PRINTF(1,2)
|
|
ssl_debug_printf(const gchar* fmt _U_,...)
|
|
{
|
|
}
|
|
#define ssl_print_data(a, b, c)
|
|
#define ssl_print_string(a, b)
|
|
#define ssl_print_text_data(a, b, c)
|
|
#define ssl_set_debug(name)
|
|
#define ssl_debug_flush()
|
|
|
|
#endif /* SSL_DECRYPT_DEBUG */
|
|
|
|
#endif /* SSL_UTILS_H */
|
|
|
|
/*
|
|
* Editor modelines - http://www.wireshark.org/tools/modelines.html
|
|
*
|
|
* Local variables:
|
|
* c-basic-offset: 4
|
|
* tab-width: 8
|
|
* indent-tabs-mode: nil
|
|
* End:
|
|
*
|
|
* vi: set shiftwidth=4 tabstop=8 expandtab
|
|
* :indentSize=4:tabSize=8:noTabs=true:
|
|
*/
|