forked from osmocom/wireshark
![Anders Broman](/assets/img/avatar_default.png)
Enable decryption of TLS 1.2. Add some cipher suites from RFC5246 and RFC5289. Fixed a bug in the handling of stream cipher. (The explicit IV field in the application record doesn't exist when stream ciphers are used. But the original code handles it as if one-byte IV exists.) https://bugs.wireshark.org/bugzilla/show_bug.cgi?id=6688 svn path=/trunk/; revision=40273
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 <stdio.h> /* some APIs we declare take a stdio stream as an argument */
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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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#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[48];
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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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#define DIG_SHA256 0x42
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#define DIG_SHA384 0x43
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typedef struct _SslRecordInfo {
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guchar *real_data;
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gint data_len;
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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 suite 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
|
|
ssl_private_key_hash (gconstpointer v);
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|
|
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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_);
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|
|
/* handling of association between tls/dtls ports and clear text protocol */
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|
extern void
|
|
ssl_association_add(GTree* associations, dissector_handle_t handle, guint port, const gchar *protocol, gboolean tcp, gboolean from_key_list);
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|
|
|
extern void
|
|
ssl_association_remove(GTree* associations, SslAssociation *assoc);
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|
|
|
extern gint
|
|
ssl_association_cmp(gconstpointer a, gconstpointer b);
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|
|
|
extern SslAssociation*
|
|
ssl_association_find(GTree * associations, guint port, gboolean tcp);
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|
|
|
extern gint
|
|
ssl_assoc_from_key_list(gpointer key _U_, gpointer data, gpointer user_data);
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|
|
|
extern gint
|
|
ssl_packet_from_server(SslDecryptSession* ssl, GTree* associations, packet_info *pinfo);
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|
|
|
/* add to packet data a copy of 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 for the specified id; return a newly created tvb for the associated data */
|
|
extern tvbuff_t*
|
|
ssl_get_record_info(tvbuff_t *parent_tvb, 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:
|
|
*/
|