Rewrite dissectors to use Libgcrypt functions.

As discussed on the mailinglist, rewriting dissectors to use Libgcrypt
functions as Libgcrypt will be mandatory after change 20030.
Removal of following functions:
- crypt_md4
- crypt_rc4*
- aes_cmac_encrypt_*
- md5_*
- sha1_*
- sha256_*

Further candidates:
- aes_*
- rijndael_*
- ...

Added functions:
- ws_hmac_buffer

Added const macros:
- HASH_MD5_LENGTH
- HASH_SHA1_LENGTH

Changes on epan/crypt/* verified with captures from
https://wiki.wireshark.org/HowToDecrypt802.11
Changes on packet-snmp.c and packet-radius.c verified with captures from
https://wiki.wireshark.org/SampleCapture
Changes on packet-tacacs.c verified with capture from
http://ccie-in-3-months.blogspot.nl/2009/04/decoding-login-credentials-regardless.html

Change-Id: Iea6ba2bf207cf0f1bf2117068fb1abcfeaafaa46
Link: https://www.wireshark.org/lists/wireshark-dev/201702/msg00011.html
Reviewed-on: https://code.wireshark.org/review/20095
Petri-Dish: Peter Wu <peter@lekensteyn.nl>
Tested-by: Petri Dish Buildbot <buildbot-no-reply@wireshark.org>
Reviewed-by: Peter Wu <peter@lekensteyn.nl>

1 files changed, 0 insertions, 112 deletions

diff --git a/wsutil/rc4.c b/wsutil/rc4.c
deleted file mode 100644
index 5f91f6ca1a..0000000000
--- a/wsutil/rc4.c
+++ /dev/null
@@ -1,112 +0,0 @@
-/*
-   Unix SMB/CIFS implementation.
-
-   a partial implementation of RC4 designed for use in the
-   SMB authentication protocol
-
-   Copyright (C) Andrew Tridgell 1998
-
-   This program is free software; you can redistribute it and/or modify
-   it under the terms of the GNU General Public License as published by
-   the Free Software Foundation; either version 2 of the License, or
-   (at your option) any later version.
-
-   This program is distributed in the hope that it will be useful,
-   but WITHOUT ANY WARRANTY; without even the implied warranty of
-   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
-   GNU General Public License for more details.
-
-   You should have received a copy of the GNU General Public License
-   along with this program; if not, write to the Free Software
-   Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
-*/
-
-#include "config.h"
-
-#include <string.h>
-
-#include "rc4.h"
-
-/* Perform RC4 on a block of data using specified key.  "data" is a pointer
-   to the block to be processed.  Output is written to same memory as input,
-   so caller may need to make a copy before calling this function, since
-   the input will be overwritten.
-
-   Taken from Samba source code.  Modified to allow us to maintain state
-   between calls to crypt_rc4.
-*/
-
-void crypt_rc4_init(rc4_state_struct *rc4_state,
-                    const unsigned char *key, int key_len)
-{
-  int ind;
-  unsigned char j = 0;
-  unsigned char *s_box;
-
-  memset(rc4_state, 0, sizeof(rc4_state_struct));
-  s_box = rc4_state->s_box;
-
-  for (ind = 0; ind < 256; ind++)
-  {
-    s_box[ind] = (unsigned char)ind;
-  }
-
-  for( ind = 0; ind < 256; ind++)
-  {
-     unsigned char tc;
-
-     j += (s_box[ind] + key[ind%key_len]);
-
-     tc = s_box[ind];
-     s_box[ind] = s_box[j];
-     s_box[j] = tc;
-  }
-
-}
-
-void crypt_rc4(rc4_state_struct *rc4_state, unsigned char *data, int data_len)
-{
-  unsigned char *s_box;
-  unsigned char index_i;
-  unsigned char index_j;
-  int ind;
-
-  /* retrieve current state from the state struct (so we can resume where
-     we left off) */
-  index_i = rc4_state->index_i;
-  index_j = rc4_state->index_j;
-  s_box = rc4_state->s_box;
-
-  for( ind = 0; ind < data_len; ind++)
-  {
-    unsigned char tc;
-    unsigned char t;
-
-    index_i++;
-    index_j += s_box[index_i];
-
-    tc = s_box[index_i];
-    s_box[index_i] = s_box[index_j];
-    s_box[index_j] = tc;
-
-    t = s_box[index_i] + s_box[index_j];
-    data[ind] = data[ind] ^ s_box[t];
-  }
-
-  /* Store the updated state */
-  rc4_state->index_i = index_i;
-  rc4_state->index_j = index_j;
-}
-
-/*
- * Editor modelines  -  http://www.wireshark.org/tools/modelines.html
- *
- * Local Variables:
- * c-basic-offset: 2
- * tab-width: 8
- * indent-tabs-mode: nil
- * End:
- *
- * ex: set shiftwidth=2 tabstop=8 expandtab:
- * :indentSize=2:tabSize=8:noTabs=true:
- */