lib/gnutls_datum.c

   1 /*
   2  *      Copyright (C) 2001,2002 Nikos Mavroyanopoulos
   3  *
   4  * This file is part of GNUTLS.
   5  *
   6  *  The GNUTLS library is free software; you can redistribute it and/or
   7  *  modify it under the terms of the GNU Lesser General Public
   8  *  License as published by the Free Software Foundation; either
   9  *  version 2.1 of the License, or (at your option) any later version.
  10  *
  11  *  This library 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 GNU
  14  *  Lesser General Public License for more details.
  15  *
  16  *  You should have received a copy of the GNU Lesser General Public
  17  *  License along with this library; if not, write to the Free Software
  18  *  Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307  USA
  19  *
  20  */
  21
  22 #include <gnutls_int.h>
  23 #include <gnutls_num.h>
  24 #include <gnutls_datum.h>
  25 #include <gnutls_errors.h>
  26
  27 /* contains functions that make it easier to
  28  * write vectors of <size|data>. The destination size
  29  * should be preallocated (datum.size+(bits/8))
  30  */
  31
  32 void _gnutls_write_datum16( opaque* dest, gnutls_datum dat) {
  33         _gnutls_write_uint16( dat.size, dest);
  34         memcpy( &dest[2], dat.data, dat.size);
  35 }
  36 void _gnutls_write_datum24( opaque* dest, gnutls_datum dat) {
  37         _gnutls_write_uint24( dat.size, dest);
  38         memcpy( &dest[3], dat.data, dat.size);
  39 }
  40 void _gnutls_write_datum32( opaque* dest, gnutls_datum dat) {
  41         _gnutls_write_uint32( dat.size, dest);
  42         memcpy( &dest[4], dat.data, dat.size);
  43 }
  44 void _gnutls_write_datum8( opaque* dest, gnutls_datum dat) {
  45         dest[0] = (uint8) dat.size;
  46         memcpy( &dest[1], dat.data, dat.size);
  47 }
  48
  49 int gnutls_set_datum( gnutls_datum* dat, const void* data, int data_size) {
  50         dat->data = gnutls_malloc(data_size);
  51         if (dat->data==NULL) return GNUTLS_E_MEMORY_ERROR;
  52
  53         dat->size = data_size;
  54         memcpy( dat->data, data, data_size);
  55
  56         return 0;
  57 }
  58
  59 int gnutls_datum_append( gnutls_datum* dst, const void* data, int data_size) {
  60
  61         dst->data = gnutls_realloc(dst->data, data_size+dst->size);
  62         if (dst->data==NULL) return GNUTLS_E_MEMORY_ERROR;
  63
  64         memcpy( &dst->data[dst->size], data, data_size);
  65         dst->size += data_size;
  66
  67         return 0;
  68 }
  69
  70 int gnutls_sset_datum( gnutls_datum* dat, const void* data, int data_size) {
  71         dat->data = gnutls_secure_malloc(data_size);
  72         if (dat->data==NULL) return GNUTLS_E_MEMORY_ERROR;
  73
  74         dat->size = data_size;
  75         memcpy( dat->data, data, data_size);
  76
  77         return 0;
  78 }
  79
  80 void gnutls_free_datum( gnutls_datum* dat) {
  81         if (dat->data!=NULL && dat->size!=0)
  82                 gnutls_free( dat->data);
  83
  84         dat->data = NULL;
  85         dat->size = 0;
  86 }
  87
  88 void gnutls_sfree_datum( gnutls_datum* dat) {
  89         if (dat->data!=NULL && dat->size!=0)
  90                 gnutls_free( dat->data);
  91
  92         dat->data = NULL;
  93         dat->size = 0;
  94 }