10db04c78b
svn path=/trunk/; revision=19072
1796 lines
54 KiB
C
1796 lines
54 KiB
C
/* packet-ssl-utils.c
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*
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* $Id$
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*
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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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* 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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#ifdef HAVE_CONFIG_H
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# include "config.h"
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#endif
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#include <stdio.h>
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#include <stdlib.h>
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#include <string.h>
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#include "packet-ssl-utils.h"
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#include <epan/emem.h>
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void
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ssl_data_set(StringInfo* str, guchar* data, guint len)
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{
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memcpy(str->data, data, len);
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str->data_len = len;
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}
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#ifdef HAVE_LIBGNUTLS
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/* hmac abstraction layer */
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#define SSL_HMAC gcry_md_hd_t
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static inline void
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ssl_hmac_init(SSL_HMAC* md, const void * key, gint len, gint algo)
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{
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gcry_md_open(md,algo, GCRY_MD_FLAG_HMAC);
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gcry_md_setkey (*(md), key, len);
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}
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static inline void
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ssl_hmac_update(SSL_HMAC* md, const void* data, gint len)
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{
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gcry_md_write(*(md), data, len);
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}
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static inline void
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ssl_hmac_final(SSL_HMAC* md, guchar* data, guint* datalen)
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{
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gint algo;
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guint len;
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algo = gcry_md_get_algo (*(md));
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len = gcry_md_get_algo_dlen(algo);
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memcpy(data, gcry_md_read(*(md), algo), len);
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*datalen =len;
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}
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static inline void
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ssl_hmac_cleanup(SSL_HMAC* md)
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{
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gcry_md_close(*(md));
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}
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/* memory digest abstraction layer*/
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#define SSL_MD gcry_md_hd_t
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static inline void
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ssl_md_init(SSL_MD* md, gint algo)
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{
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gcry_md_open(md,algo, 0);
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}
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static inline void
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ssl_md_update(SSL_MD* md, guchar* data, gint len)
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{
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gcry_md_write(*(md), data, len);
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}
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static inline void
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ssl_md_final(SSL_MD* md, guchar* data, guint* datalen)
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{
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gint algo;
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gint len;
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algo = gcry_md_get_algo (*(md));
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len = gcry_md_get_algo_dlen (algo);
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memcpy(data, gcry_md_read(*(md), algo), len);
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*datalen = len;
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}
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static inline void
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ssl_md_cleanup(SSL_MD* md)
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{
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gcry_md_close(*(md));
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}
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/* md5 /sha abstraction layer */
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#define SSL_SHA_CTX gcry_md_hd_t
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#define SSL_MD5_CTX gcry_md_hd_t
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static inline void
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ssl_sha_init(SSL_SHA_CTX* md)
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{
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gcry_md_open(md,GCRY_MD_SHA1, 0);
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}
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static inline void
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ssl_sha_update(SSL_SHA_CTX* md, guchar* data, gint len)
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{
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gcry_md_write(*(md), data, len);
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}
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static inline void
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ssl_sha_final(guchar* buf, SSL_SHA_CTX* md)
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{
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memcpy(buf, gcry_md_read(*(md), GCRY_MD_SHA1),
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gcry_md_get_algo_dlen(GCRY_MD_SHA1));
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}
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static inline void
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ssl_sha_cleanup(SSL_SHA_CTX* md)
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{
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gcry_md_close(*(md));
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}
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static inline gint
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ssl_md5_init(SSL_MD5_CTX* md)
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{
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return gcry_md_open(md,GCRY_MD_MD5, 0);
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}
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static inline void
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ssl_md5_update(SSL_MD5_CTX* md, guchar* data, gint len)
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{
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gcry_md_write(*(md), data, len);
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}
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static inline void
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ssl_md5_final(guchar* buf, SSL_MD5_CTX* md)
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{
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memcpy(buf, gcry_md_read(*(md), GCRY_MD_MD5),
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gcry_md_get_algo_dlen(GCRY_MD_MD5));
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}
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static inline void
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ssl_md5_cleanup(SSL_MD5_CTX* md)
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{
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gcry_md_close(*(md));
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}
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static gint
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ssl_cipher_setiv(gcry_cipher_hd_t *cipher,guchar* iv, gint iv_len)
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{
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/* guchar * ivp; */
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gint ret;
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/* gint i; */
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gcry_cipher_hd_t c;
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ret=0;
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c=(gcry_cipher_hd_t)*cipher;
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ssl_debug_printf("--------------------------------------------------------------------");
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/*for(ivp=c->iv,i=0; i < iv_len; i++ )
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{
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ssl_debug_printf("%d ",ivp[i]);
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i++;
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}
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*/
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ssl_debug_printf("--------------------------------------------------------------------");
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ret = gcry_cipher_setiv(*(cipher), iv, iv_len);
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/*for(ivp=c->iv,i=0; i < iv_len; i++ )
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{
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ssl_debug_printf("%d ",ivp[i]);
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i++;
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}
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*/
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ssl_debug_printf("--------------------------------------------------------------------");
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return ret;
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}
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/* stream cipher abstraction layer*/
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static gint
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ssl_cipher_init(gcry_cipher_hd_t *cipher, gint algo, guchar* sk,
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guchar* iv, gint mode)
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{
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gint gcry_modes[]={GCRY_CIPHER_MODE_STREAM,GCRY_CIPHER_MODE_CBC};
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gint err;
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err = gcry_cipher_open(cipher, algo, gcry_modes[mode], 0);
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if (err !=0)
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return -1;
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err = gcry_cipher_setkey(*(cipher), sk, gcry_cipher_get_algo_keylen (algo));
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if (err != 0)
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return -1;
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err = gcry_cipher_setiv(*(cipher), iv, gcry_cipher_get_algo_blklen (algo));
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if (err != 0)
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return -1;
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return 0;
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}
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static inline gint
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ssl_cipher_decrypt(gcry_cipher_hd_t *cipher, guchar * out, gint outl,
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const guchar * in, gint inl)
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{
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return gcry_cipher_decrypt ( *(cipher), out, outl, in, inl);
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}
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static inline gint
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ssl_get_digest_by_name(const gchar*name)
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{
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return gcry_md_map_name(name);
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}
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static inline gint
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ssl_get_cipher_by_name(const gchar* name)
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{
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return gcry_cipher_map_name(name);
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}
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static inline void
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ssl_cipher_cleanup(gcry_cipher_hd_t *cipher)
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{
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gcry_cipher_close(*cipher);
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*cipher = NULL;
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}
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/* private key abstraction layer */
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static inline gint
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ssl_get_key_len(SSL_PRIVATE_KEY* pk) {return gcry_pk_get_nbits (pk); }
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gcry_err_code_t
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_gcry_rsa_decrypt (int algo, gcry_mpi_t *result, gcry_mpi_t *data,
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gcry_mpi_t *skey, gint flags);
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#define PUBKEY_FLAG_NO_BLINDING (1 << 0)
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/* decrypt data with private key. Store decrypted data directly into input
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* buffer */
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int
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ssl_private_decrypt(guint len, guchar* encr_data, SSL_PRIVATE_KEY* pk)
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{
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gint rc;
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size_t decr_len;
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gcry_sexp_t s_data, s_plain;
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gcry_mpi_t encr_mpi;
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size_t i, encr_len;
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guchar* decr_data_ptr;
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gcry_mpi_t text;
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decr_len = 0;
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encr_len = len;
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text=NULL;
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/* build up a mpi rappresentation for encrypted data */
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rc = gcry_mpi_scan(&encr_mpi, GCRYMPI_FMT_USG,encr_data, encr_len, &encr_len);
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if (rc != 0 ) {
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ssl_debug_printf("pcry_private_decrypt: can't convert encr_data to mpi (size %d):%s\n",
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len, gcry_strerror(rc));
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return 0;
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}
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#ifndef SSL_FAST
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/* put the data into a simple list */
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rc = gcry_sexp_build(&s_data, NULL, "(enc-val(rsa(a%m)))", encr_mpi);
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if (rc != 0) {
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ssl_debug_printf("pcry_private_decrypt: can't build encr_sexp:%s \n",
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gcry_strerror(rc));
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return 0;
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}
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/* pass it to libgcrypt */
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rc = gcry_pk_decrypt(&s_plain, s_data, pk);
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gcry_sexp_release(s_data);
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if (rc != 0)
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{
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ssl_debug_printf("pcry_private_decrypt: can't decrypt key:%s\n",
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gcry_strerror(rc));
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goto out;
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}
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/* convert plain text sexp to mpi format */
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text = gcry_sexp_nth_mpi(s_plain, 0, 0);
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/* compute size requested for plaintext buffer */
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decr_len = len;
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if (gcry_mpi_print(GCRYMPI_FMT_USG, NULL, decr_len, &decr_len, text) != 0) {
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ssl_debug_printf("pcry_private_decrypt: can't compute decr size:%s\n",
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gcry_strerror(rc));
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decr_len = 0;
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goto out;
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}
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/* sanity check on out buffer */
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if (decr_len > len) {
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ssl_debug_printf("pcry_private_decrypt: decrypted data is too long ?!? (%d max %d)\n",
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decr_len, len);
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return 0;
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}
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/* write plain text to encrypted data buffer */
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decr_data_ptr = encr_data;
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if (gcry_mpi_print( GCRYMPI_FMT_USG, decr_data_ptr, decr_len, &decr_len,
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text) != 0) {
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ssl_debug_printf("pcry_private_decrypt: can't print decr data to mpi (size %d):%s\n",
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decr_len, gcry_strerror(rc));
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g_free(decr_data_ptr);
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decr_len = 0;
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goto out;
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}
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/* strip the padding*/
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rc = 0;
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for (i = 1; i < decr_len; i++) {
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if (decr_data_ptr[i] == 0) {
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rc = i+1;
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break;
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}
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}
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ssl_debug_printf("pcry_private_decrypt: stripping %d bytes, decr_len %d\n",
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rc, decr_len);
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ssl_print_data("decypted_unstrip_pre_master", decr_data_ptr, decr_len);
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g_memmove(decr_data_ptr, &decr_data_ptr[rc], decr_len - rc);
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decr_len -= rc;
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out:
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gcry_sexp_release(s_plain);
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#else /* SSL_FAST */
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rc = _gcry_rsa_decrypt(0, &text, &encr_mpi, pk,0);
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gcry_mpi_print( GCRYMPI_FMT_USG, 0, 0, &decr_len, text);
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/* sanity check on out buffer */
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if (decr_len > len) {
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ssl_debug_printf("pcry_private_decrypt: decrypted data is too long ?!? (%d max %d)\n",
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decr_len, len);
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return 0;
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}
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/* write plain text to newly allocated buffer */
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decr_data_ptr = encr_data;
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if (gcry_mpi_print( GCRYMPI_FMT_USG, decr_data_ptr, decr_len, &decr_len,
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text) != 0) {
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ssl_debug_printf("pcry_private_decrypt: can't print decr data to mpi (size %d):%s\n",
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decr_len, gcry_strerror(rc));
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return 0;
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}
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/* strip the padding*/
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rc = 0;
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for (i = 1; i < decr_len; i++) {
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if (decr_data_ptr[i] == 0) {
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rc = i+1;
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break;
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}
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}
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ssl_debug_printf("pcry_private_decrypt: stripping %d bytes, decr_len %d\n",
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rc, decr_len);
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ssl_print_data("decypted_unstrip_pre_master", decr_data_ptr, decr_len);
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g_memmove(decr_data_ptr, &decr_data_ptr[rc], decr_len - rc);
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decr_len -= rc;
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#endif /* SSL_FAST */
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gcry_mpi_release(text);
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return decr_len;
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}
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/* stringinfo interface */
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static gint
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ssl_data_alloc(StringInfo* str, guint len)
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{
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str->data = g_malloc(len);
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if (!str->data)
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return -1;
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str->data_len = len;
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return 0;
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}
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#define PRF(ssl,secret,usage,rnd1,rnd2,out) ((ssl->version_netorder==SSLV3_VERSION)? \
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ssl3_prf(secret,usage,rnd1,rnd2,out): \
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tls_prf(secret,usage,rnd1,rnd2,out))
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static const gchar *digests[]={
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"MD5",
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"SHA1"
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};
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static const gchar *ciphers[]={
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"DES",
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"3DES",
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"ARCFOUR", /* gnutls does not support rc4, but this should be 100% compatible*/
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"RC2",
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"IDEA",
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"AES",
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"AES256",
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"*UNKNOWN*"
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};
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/* look in openssl/ssl/ssl_lib.c for a complete list of available cipersuite*/
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static SslCipherSuite cipher_suites[]={
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{1,KEX_RSA,SIG_RSA,ENC_NULL,0,0,0,DIG_MD5,16,0, SSL_CIPHER_MODE_STREAM},
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{2,KEX_RSA,SIG_RSA,ENC_NULL,0,0,0,DIG_SHA,20,0, SSL_CIPHER_MODE_STREAM},
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{3,KEX_RSA,SIG_RSA,ENC_RC4,1,128,40,DIG_MD5,16,1, SSL_CIPHER_MODE_STREAM},
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{4,KEX_RSA,SIG_RSA,ENC_RC4,1,128,128,DIG_MD5,16,0, SSL_CIPHER_MODE_STREAM},
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{5,KEX_RSA,SIG_RSA,ENC_RC4,1,128,128,DIG_SHA,20,0, SSL_CIPHER_MODE_STREAM},
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{6,KEX_RSA,SIG_RSA,ENC_RC2,8,128,40,DIG_SHA,20,1, SSL_CIPHER_MODE_STREAM},
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{7,KEX_RSA,SIG_RSA,ENC_IDEA,8,128,128,DIG_SHA,20,0, SSL_CIPHER_MODE_STREAM},
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{8,KEX_RSA,SIG_RSA,ENC_DES,8,64,40,DIG_SHA,20,1, SSL_CIPHER_MODE_CBC},
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{9,KEX_RSA,SIG_RSA,ENC_DES,8,64,64,DIG_SHA,20,0, SSL_CIPHER_MODE_CBC},
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{10,KEX_RSA,SIG_RSA,ENC_3DES,8,192,192,DIG_SHA,20,0, SSL_CIPHER_MODE_CBC},
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{11,KEX_DH,SIG_DSS,ENC_DES,8,64,40,DIG_SHA,20,1, SSL_CIPHER_MODE_STREAM},
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{12,KEX_DH,SIG_DSS,ENC_DES,8,64,64,DIG_SHA,20,0, SSL_CIPHER_MODE_STREAM},
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{13,KEX_DH,SIG_DSS,ENC_3DES,8,192,192,DIG_SHA,20,0, SSL_CIPHER_MODE_STREAM},
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{14,KEX_DH,SIG_RSA,ENC_DES,8,64,40,DIG_SHA,20,1, SSL_CIPHER_MODE_STREAM},
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{15,KEX_DH,SIG_RSA,ENC_DES,8,64,64,DIG_SHA,20,0, SSL_CIPHER_MODE_STREAM},
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{16,KEX_DH,SIG_RSA,ENC_3DES,8,192,192,DIG_SHA,20,0, SSL_CIPHER_MODE_STREAM},
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{17,KEX_DH,SIG_DSS,ENC_DES,8,64,40,DIG_SHA,20,1, SSL_CIPHER_MODE_STREAM},
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{18,KEX_DH,SIG_DSS,ENC_DES,8,64,64,DIG_SHA,20,0, SSL_CIPHER_MODE_STREAM},
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{19,KEX_DH,SIG_DSS,ENC_3DES,8,192,192,DIG_SHA,20,0, SSL_CIPHER_MODE_STREAM},
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{20,KEX_DH,SIG_RSA,ENC_DES,8,64,40,DIG_SHA,20,1, SSL_CIPHER_MODE_STREAM},
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{21,KEX_DH,SIG_RSA,ENC_DES,8,64,64,DIG_SHA,20,0, SSL_CIPHER_MODE_STREAM},
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{22,KEX_DH,SIG_RSA,ENC_3DES,8,192,192,DIG_SHA,20,0, SSL_CIPHER_MODE_STREAM},
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{23,KEX_DH,SIG_NONE,ENC_RC4,1,128,40,DIG_MD5,16,1, SSL_CIPHER_MODE_STREAM},
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{24,KEX_DH,SIG_NONE,ENC_RC4,1,128,128,DIG_MD5,16,0, SSL_CIPHER_MODE_STREAM},
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{25,KEX_DH,SIG_NONE,ENC_DES,8,64,40,DIG_MD5,16,1, SSL_CIPHER_MODE_STREAM},
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{26,KEX_DH,SIG_NONE,ENC_DES,8,64,64,DIG_MD5,16,0, SSL_CIPHER_MODE_STREAM},
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{27,KEX_DH,SIG_NONE,ENC_3DES,8,192,192,DIG_MD5,16,0, SSL_CIPHER_MODE_STREAM},
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{47,KEX_RSA,SIG_RSA,ENC_AES,16,128,128,DIG_SHA,20,0, SSL_CIPHER_MODE_CBC},
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{53,KEX_RSA,SIG_RSA,ENC_AES256,16,256,256,DIG_SHA,20,0, SSL_CIPHER_MODE_CBC},
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{96,KEX_RSA,SIG_RSA,ENC_RC4,1,128,56,DIG_MD5,16,1, SSL_CIPHER_MODE_STREAM},
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{97,KEX_RSA,SIG_RSA,ENC_RC2,1,128,56,DIG_MD5,16,1, SSL_CIPHER_MODE_STREAM},
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{98,KEX_RSA,SIG_RSA,ENC_DES,8,64,64,DIG_SHA,20,1, SSL_CIPHER_MODE_STREAM},
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{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:
|
|
free(s2.data);
|
|
free_s1:
|
|
free(s1.data);
|
|
free_seed:
|
|
free(seed.data);
|
|
free_md5:
|
|
free(md5_out.data);
|
|
free_sha:
|
|
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 gint
|
|
ssl_create_decoder(SslDecoder *dec, SslCipherSuite *cipher_suite,
|
|
guint8 *mk, guint8 *sk, guint8 *iv)
|
|
{
|
|
gint ciph;
|
|
ciph=0;
|
|
/* 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 -1;
|
|
}
|
|
|
|
/* 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->mac_key.data = dec->_mac_key;
|
|
ssl_data_set(&dec->mac_key, mk, cipher_suite->dig_len);
|
|
dec->seq = 0;
|
|
|
|
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 -1;
|
|
}
|
|
|
|
ssl_debug_printf("decoder initialized (digest len %d)\n", cipher_suite->dig_len);
|
|
return 0;
|
|
}
|
|
|
|
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");
|
|
if (ssl_create_decoder(&ssl_session->client,
|
|
&ssl_session->cipher_suite,c_mk,c_wk,c_iv)) {
|
|
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");
|
|
if (ssl_create_decoder(&ssl_session->server,
|
|
&ssl_session->cipher_suite,s_mk,s_wk,s_iv)) {
|
|
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.seq, ssl_session->server.seq);
|
|
g_free(key_block.data);
|
|
return 0;
|
|
|
|
fail:
|
|
g_free(key_block.data);
|
|
return -1;
|
|
}
|
|
|
|
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 lenght (%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 lenght 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 lenght 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 lenght 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_decrypt_record(SslDecryptSession*ssl,SslDecoder* decoder, gint ct,
|
|
const guchar* in, gint inl, guchar*out, gint* outl)
|
|
{
|
|
gint pad, worklen;
|
|
guint8 *mac;
|
|
|
|
|
|
ssl_debug_printf("ssl_decrypt_record ciphertext len %d\n", inl);
|
|
ssl_print_data("Ciphertext",in, inl);
|
|
|
|
/* First decrypt*/
|
|
if ((pad = ssl_cipher_decrypt(&decoder->evp,out,*outl,in,inl))!= 0)
|
|
ssl_debug_printf("ssl_decrypt_record: %s %s\n", gcry_strsource (pad),
|
|
gcry_strerror (pad));
|
|
|
|
ssl_print_data("Plaintext",out,inl);
|
|
worklen=inl;
|
|
|
|
/* Now strip off the padding*/
|
|
if(decoder->cipher_suite->block!=1){
|
|
pad=out[inl-1];
|
|
worklen-=(pad+1);
|
|
ssl_debug_printf("ssl_decrypt_record found padding %d final len %d\n",
|
|
pad, *outl);
|
|
}
|
|
|
|
/* And the MAC */
|
|
worklen-=decoder->cipher_suite->dig_len;
|
|
if (worklen < 0)
|
|
{
|
|
ssl_debug_printf("ssl_decrypt_record wrong record len/padding outlen %d\n work %d\n",*outl, worklen);
|
|
return -1;
|
|
}
|
|
mac=out+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,out+decoder->cipher_suite->block,worklen);
|
|
}
|
|
if(ssl->version_netorder==DTLSV1DOT0_VERSION){
|
|
worklen=worklen-decoder->cipher_suite->block;
|
|
memcpy(out,out+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,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,worklen,mac)< 0) {
|
|
ssl_debug_printf("ssl_decrypt_record: mac failed\n");
|
|
return -1;
|
|
}
|
|
}
|
|
else if(ssl->version_netorder==DTLSV1DOT0_VERSION){
|
|
/* follow the openssl dtls errors the rigth test is : dtls_check_mac(decoder,ct,ssl->version_netorder,out,worklen,mac)< 0 */
|
|
if(tls_check_mac(decoder,ct,TLSV1_VERSION,out,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;
|
|
return(0);
|
|
}
|
|
|
|
/* old relase of gnutls does not define the appropriate macros, so get
|
|
* them from the string*/
|
|
static void
|
|
ssl_get_version(gint* major, gint* minor, gint* patch)
|
|
{
|
|
const gchar* str = gnutls_check_version(NULL);
|
|
|
|
ssl_debug_printf("ssl_get_version: %s\n", str);
|
|
sscanf(str, "%d.%d.%d", major, minor, patch);
|
|
}
|
|
|
|
|
|
SSL_PRIVATE_KEY*
|
|
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.
|
|
*/
|
|
struct gnutls_x509_privkey_int* priv_key;
|
|
gnutls_datum key;
|
|
gnutls_datum m, e, d, p,q, u;
|
|
gint size, major, minor, patch;
|
|
guint bytes;
|
|
guint tmp_size;
|
|
#ifdef SSL_FAST
|
|
gcry_mpi_t* rsa_params = g_malloc(sizeof(gcry_mpi_t)*6);
|
|
#else
|
|
gcry_mpi_t rsa_params[6];
|
|
#endif
|
|
gcry_sexp_t rsa_priv_key;
|
|
|
|
/* 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");
|
|
return NULL;
|
|
}
|
|
if ((size = ftell(fp)) < 0) {
|
|
ssl_debug_printf("ssl_load_key: can't ftell file\n");
|
|
return NULL;
|
|
}
|
|
if (fseek(fp, 0, SEEK_SET) < 0) {
|
|
ssl_debug_printf("ssl_load_key: can't refseek file\n");
|
|
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);
|
|
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");
|
|
return NULL;
|
|
}
|
|
free(key.data);
|
|
|
|
/* RSA get parameter */
|
|
if (gnutls_x509_privkey_export_rsa_raw(priv_key, &m, &e, &d, &p, &q, &u) != 0) {
|
|
ssl_debug_printf("ssl_load_key: can't export rsa param (is a rsa private key file ?!?)\n");
|
|
return NULL;
|
|
}
|
|
|
|
/* convert each rsa parameter to mpi format*/
|
|
if (gcry_mpi_scan( &rsa_params[0], GCRYMPI_FMT_USG, m.data, m.size, &tmp_size) !=0) {
|
|
ssl_debug_printf("ssl_load_key: can't convert m rsa param to int (size %d)\n", m.size);
|
|
return NULL;
|
|
}
|
|
|
|
if (gcry_mpi_scan( &rsa_params[1], GCRYMPI_FMT_USG, e.data, e.size, &tmp_size) != 0) {
|
|
ssl_debug_printf("ssl_load_key: can't convert e rsa param to int (size %d)\n", e.size);
|
|
return NULL;
|
|
}
|
|
|
|
/*
|
|
* note: openssl and gnutls use 'p' and 'q' with opposite meaning:
|
|
* our 'p' must be equal to 'q' as provided from openssl and viceversa
|
|
*/
|
|
if (gcry_mpi_scan( &rsa_params[2], GCRYMPI_FMT_USG, d.data, d.size, &tmp_size) !=0) {
|
|
ssl_debug_printf("ssl_load_key: can't convert d rsa param to int (size %d)\n", d.size);
|
|
return NULL;
|
|
}
|
|
|
|
if (gcry_mpi_scan( &rsa_params[3], GCRYMPI_FMT_USG, q.data, q.size, &tmp_size) !=0) {
|
|
ssl_debug_printf("ssl_load_key: can't convert q rsa param to int (size %d)\n", q.size);
|
|
return NULL;
|
|
}
|
|
|
|
if (gcry_mpi_scan( &rsa_params[4], GCRYMPI_FMT_USG, p.data, p.size, &tmp_size) !=0) {
|
|
ssl_debug_printf("ssl_load_key: can't convert p rsa param to int (size %d)\n", p.size);
|
|
return NULL;
|
|
}
|
|
|
|
if (gcry_mpi_scan( &rsa_params[5], GCRYMPI_FMT_USG, u.data, u.size, &tmp_size) !=0) {
|
|
ssl_debug_printf("ssl_load_key: can't convert u rsa param to int (size %d)\n", m.size);
|
|
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");
|
|
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
|
|
}
|
|
|
|
void ssl_free_key(SSL_PRIVATE_KEY* key)
|
|
{
|
|
#if SSL_FAST
|
|
gint i;
|
|
for (i=0; i< 6; i++)
|
|
gcry_mpi_release(key[i]);
|
|
#else
|
|
gcry_sexp_release(key);
|
|
#endif
|
|
}
|
|
|
|
void
|
|
ssl_lib_init(void)
|
|
{
|
|
}
|
|
|
|
#else /* HAVE_LIBGNUTLS */
|
|
/* no libgnutl: dummy operation to keep interface consistent*/
|
|
void
|
|
ssl_lib_init(void)
|
|
{
|
|
}
|
|
|
|
SSL_PRIVATE_KEY*
|
|
ssl_load_key(FILE* fp)
|
|
{
|
|
ssl_debug_printf("ssl_load_key: impossible without glutls. fp %p\n",fp);
|
|
return NULL;
|
|
}
|
|
|
|
void
|
|
ssl_free_key(SSL_PRIVATE_KEY* 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;
|
|
}
|
|
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, gint inl, guchar*out, gint* 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;
|
|
}
|
|
|
|
#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",
|
|
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->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;
|
|
StringInfo* id;
|
|
guint* cur;
|
|
hash = 0;
|
|
id = (StringInfo*) v;
|
|
cur = (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 ;
|
|
guint* cur;
|
|
key = (const SslService *)v;
|
|
hash = key->port;
|
|
len = key->addr.len;
|
|
cur = (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*) 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);
|
|
strcpy(assoc->info, protocol);
|
|
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, assoc->handle);
|
|
|
|
|
|
if(!assoc->handle){
|
|
fprintf(stderr, "association_add() could not find handle for protocol:%s\n",protocol);
|
|
} else {
|
|
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, 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, 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 %d\n", ret);
|
|
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;
|
|
}
|
|
|
|
/* initialize/reset per capture state data (ssl sessions cache) */
|
|
void
|
|
ssl_common_init(GHashTable **session_hash , StringInfo * decrypted_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);
|
|
decrypted_data->data = g_malloc0(32);
|
|
decrypted_data->data_len = 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 * private_key;
|
|
FILE* fp;
|
|
|
|
start = strdup(keys_list);
|
|
tmp = start;
|
|
ssl_debug_printf("ssl_init keys string %s\n", start);
|
|
do {
|
|
gchar* addr, *port, *protocol, *filename;
|
|
|
|
addr = start;
|
|
/* split ip/file couple with ';' separator*/
|
|
end = strchr(start, ';');
|
|
if (end) {
|
|
*end = 0;
|
|
start = end+1;
|
|
}
|
|
|
|
/* 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);
|
|
break;
|
|
}
|
|
*port = 0;
|
|
port++;
|
|
|
|
protocol = strchr(port,',');
|
|
if (!protocol)
|
|
{
|
|
ssl_debug_printf("ssl_init entry malformed can't find protocol in %s\n", port);
|
|
break;
|
|
}
|
|
*protocol=0;
|
|
protocol++;
|
|
|
|
filename = strchr(protocol,',');
|
|
if (!filename)
|
|
{
|
|
ssl_debug_printf("ssl_init entry malformed can't find filename in %s\n", port);
|
|
break;
|
|
}
|
|
*filename=0;
|
|
filename++;
|
|
|
|
/* 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);
|
|
sscanf(addr, "%hhu.%hhu.%hhu.%hhu", &ip[0], &ip[1], &ip[2], &ip[3]);
|
|
service->port = atoi(port);
|
|
ssl_debug_printf("ssl_init addr %hhu.%hhu.%hhu.%hhu port %d filename %s\n",
|
|
ip[0], ip[1], ip[2], ip[3], service->port, filename);
|
|
|
|
/* try to load pen file*/
|
|
fp = fopen(filename, "rb");
|
|
if (!fp) {
|
|
fprintf(stderr, "can't open file %s \n",filename);
|
|
break;
|
|
}
|
|
|
|
private_key = ssl_load_key(fp);
|
|
if (!private_key) {
|
|
fprintf(stderr,"can't load private key from %s\n",
|
|
filename);
|
|
break;
|
|
}
|
|
fclose(fp);
|
|
|
|
ssl_debug_printf("ssl_init private key file %s successfully loaded\n",
|
|
filename);
|
|
g_hash_table_insert(key_hash, service, private_key);
|
|
|
|
ssl_association_add(associations, handle, atoi(port), protocol, tcp, TRUE);
|
|
|
|
} while (end != NULL);
|
|
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 = fopen(name, "w");
|
|
if (!use_stderr && ssl_debug_file)
|
|
debug_file_must_be_closed = 1;
|
|
}
|
|
|
|
|
|
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);
|
|
fflush(ssl_debug_file);
|
|
}
|
|
|
|
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");
|
|
fflush(ssl_debug_file);
|
|
}
|
|
|
|
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");
|
|
fflush(ssl_debug_file);
|
|
}
|
|
|
|
void
|
|
ssl_print_string(const gchar* name, const StringInfo* data)
|
|
{
|
|
ssl_print_data(name, data->data, data->data_len);
|
|
}
|
|
#endif /* SSL_DECRYPT_DEBUG */
|