lib/gnutls_compress.c

   1 /*
   2  *      Copyright (C) 2000 Nikos Mavroyanopoulos
   3  *
   4  * This file is part of GNUTLS.
   5  *
   6  * GNUTLS is free software; you can redistribute it and/or modify
   7  * it under the terms of the GNU General Public License as published by
   8  * the Free Software Foundation; either version 2 of the License, or
   9  * (at your option) any later version.
  10  *
  11  * GNUTLS is distributed in the hope that it will be useful,
  12  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  13  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  14  * GNU General Public License for more details.
  15  *
  16  * You should have received a copy of the GNU General Public License
  17  * along with this program; if not, write to the Free Software
  18  * Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA
  19  */
  20
  21 #include "gnutls_int.h"
  22 #include "gnutls_compress.h"
  23 #include "gnutls_errors.h"
  24 #include "gnutls_compress_int.h"
  25
  26 /* These functions allocate the return value internally
  27  */
  28 int _gnutls_m_plaintext2compressed(GNUTLS_STATE state,
  29                                                      gnutls_datum*
  30                                                      compress,
  31                                                      gnutls_datum plaintext)
  32 {
  33         int size;
  34         char *data;
  35
  36         data=NULL;
  37
  38         size = _gnutls_compress( state->connection_state.write_compression_state,
  39                 plaintext.data, plaintext.size, &data, MAX_RECORD_SIZE+1024);
  40         if (size < 0) {
  41                 gnutls_assert();
  42                 return GNUTLS_E_COMPRESSION_FAILED;
  43         }
  44         compress->data = data;
  45         compress->size = size;
  46
  47         return 0;
  48 }
  49
  50 int _gnutls_m_compressed2plaintext(GNUTLS_STATE state,
  51                                                      gnutls_datum* plain,
  52                                                      gnutls_datum
  53                                                      compressed)
  54 {
  55         int size;
  56         char* data;
  57
  58         data=NULL;
  59
  60         size = _gnutls_decompress( state->connection_state.read_compression_state,
  61                 compressed.data, compressed.size, &data, MAX_RECORD_SIZE);
  62         if (size < 0) {
  63                 gnutls_assert();
  64                 return GNUTLS_E_DECOMPRESSION_FAILED;
  65         }
  66         plain->data = data;
  67         plain->size = size;
  68
  69         return 0;
  70 }
  71
  72
  73
  74