src/purple/purple-digest.c

   1 /**
   2  * @file purple-digest.c
   3  *
   4  * pidgin-sipe
   5  *
   6  * Copyright (C) 2010 SIPE Project <http://sipe.sourceforge.net/>
   7  *
   8  * This program is free software; you can redistribute it and/or modify
   9  * it under the terms of the GNU General Public License as published by
  10  * the Free Software Foundation; either version 2 of the License, or
  11  * (at your option) any later version.
  12  *
  13  * This program is distributed in the hope that it will be useful,
  14  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  15  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  16  * GNU General Public License for more details.
  17  *
  18  * You should have received a copy of the GNU General Public License
  19  * along with this program; if not, write to the Free Software
  20  * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
  21  */
  22
  23 #include "glib.h"
  24 #include "cipher.h"
  25
  26 #include "sipe-digest.h"
  27
  28 void sipe_digest_hmac_md5(const guchar *key, gsize key_length,
  29                           const guchar *data, gsize data_length,
  30                           guchar *digest)
  31 {
  32         PurpleCipherContext *context = purple_cipher_context_new_by_name("hmac", NULL);
  33         purple_cipher_context_set_option(context, "hash", "md5");
  34         purple_cipher_context_set_key_with_len(context, key, key_length);
  35         purple_cipher_context_append(context, data, data_length);
  36         purple_cipher_context_digest(context, SIPE_DIGEST_HMAC_MD5_LENGTH, digest, NULL);
  37         purple_cipher_context_destroy(context);
  38 }
  39
  40 static void purple_digest(const gchar *algorithm,
  41                           const guchar *data, gsize data_length,
  42                           guchar *digest, gsize digest_length)
  43 {
  44         PurpleCipherContext *ctx = purple_cipher_context_new_by_name(algorithm, NULL);
  45         purple_cipher_context_append(ctx, data, data_length);
  46         purple_cipher_context_digest(ctx, digest_length, digest, NULL);
  47         purple_cipher_context_destroy(ctx);
  48 }
  49
  50 void sipe_digest_md4(const guchar *data, gsize length, guchar *digest)
  51 {
  52         purple_digest("md4", data, length, digest, SIPE_DIGEST_MD4_LENGTH);
  53 }
  54
  55 void sipe_digest_md5(const guchar *data, gsize length, guchar *digest)
  56 {
  57         purple_digest("md5", data, length, digest, SIPE_DIGEST_MD5_LENGTH);
  58 }
  59
  60 void sipe_digest_sha1(const guchar *data, gsize length, guchar *digest)
  61 {
  62         purple_digest("sha1", data, length, digest, SIPE_DIGEST_SHA1_LENGTH);
  63 }
  64
  65 /* Stream HMAC(SHA1) digest for file transfer */
  66 gpointer sipe_digest_ft_start(const guchar *sha1_digest)
  67 {
  68         PurpleCipherContext *context = purple_cipher_context_new_by_name("hmac", NULL);
  69         purple_cipher_context_set_option(context, "hash", "sha1");
  70         /* used only the first 16 bytes of the 20 byte SHA1 digest */
  71         purple_cipher_context_set_key_with_len(context, sha1_digest, 16);
  72         return(context);
  73 }
  74
  75 void sipe_digest_ft_update(gpointer context, const guchar *data, gsize length)
  76 {
  77         purple_cipher_context_append(context, data, length);
  78 }
  79
  80 void sipe_digest_ft_end(gpointer context, guchar *digest)
  81 {
  82         purple_cipher_context_digest(context, SIPE_DIGEST_FILETRANSFER_LENGTH, digest, NULL);
  83 }
  84
  85 void sipe_digest_ft_destroy(gpointer context)
  86 {
  87         purple_cipher_context_destroy(context);
  88 }
  89
  90 /*
  91   Local Variables:
  92   mode: c
  93   c-file-style: "bsd"
  94   indent-tabs-mode: t
  95   tab-width: 8
  96   End:
  97 */