lib/gnutls_datum.c

   1 /*
   2  *      Copyright (C) 2001 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_num.h>
  23 #include <gnutls_datum.h>
  24 #include <gnutls_errors.h>
  25
  26 /* contains functions that make it easier to
  27  * write vectors of <size|data>. The destination size
  28  * should be preallocated (datum.size+(bits/8))
  29  */
  30
  31 void WRITEdatum16( opaque* dest, gnutls_datum dat) {
  32         WRITEuint16( dat.size, dest);
  33         memcpy( &dest[2], dat.data, dat.size);
  34 }
  35 void WRITEdatum24( opaque* dest, gnutls_datum dat) {
  36         WRITEuint24( dat.size, dest);
  37         memcpy( &dest[3], dat.data, dat.size);
  38 }
  39 void WRITEdatum32( opaque* dest, gnutls_datum dat) {
  40         WRITEuint32( dat.size, dest);
  41         memcpy( &dest[4], dat.data, dat.size);
  42 }
  43 void WRITEdatum8( opaque* dest, gnutls_datum dat) {
  44         dest[0] = (uint8) dat.size;
  45         memcpy( &dest[1], dat.data, dat.size);
  46 }
  47
  48 int gnutls_set_datum( gnutls_datum* dat, const void* data, int data_size) {
  49         dat->data = gnutls_malloc(data_size);
  50         if (dat->data==NULL) return GNUTLS_E_MEMORY_ERROR;
  51
  52         dat->size = data_size;
  53         memcpy( dat->data, data, data_size);
  54
  55         return 0;
  56 }
  57
  58 int gnutls_datum_append( gnutls_datum* dst, const void* data, int data_size) {
  59
  60         dst->data = gnutls_realloc(dst->data, data_size+dst->size);
  61         if (dst->data==NULL) return GNUTLS_E_MEMORY_ERROR;
  62
  63         memcpy( &dst->data[dst->size], data, data_size);
  64         dst->size += data_size;
  65
  66         return 0;
  67 }
  68
  69 int gnutls_sset_datum( gnutls_datum* dat, const void* data, int data_size) {
  70         dat->data = gnutls_secure_malloc(data_size);
  71         if (dat->data==NULL) return GNUTLS_E_MEMORY_ERROR;
  72
  73         dat->size = data_size;
  74         memcpy( dat->data, data, data_size);
  75
  76         return 0;
  77 }
  78
  79 void gnutls_free_datum( gnutls_datum* dat) {
  80         if (dat->data!=NULL && dat->size!=0)
  81                 gnutls_free( dat->data);
  82
  83         dat->data = NULL;
  84         dat->size = 0;
  85 }
  86
  87 void gnutls_sfree_datum( gnutls_datum* dat) {
  88         if (dat->data!=NULL && dat->size!=0)
  89                 gnutls_secure_free( dat->data);
  90
  91         dat->data = NULL;
  92         dat->size = 0;
  93 }