lib/x509_b64.h

   1 /*
   2  * Copyright (C) 2000, 2001, 2002, 2003, 2004, 2005, 2010 Free Software
   3  * Foundation, Inc.
   4  *
   5  * Author: Nikos Mavrogiannopoulos
   6  *
   7  * This file is part of GnuTLS.
   8  *
   9  * The GnuTLS is free software; you can redistribute it and/or
  10  * modify it under the terms of the GNU Lesser General Public License
  11  * as published by the Free Software Foundation; either version 2.1 of
  12  * the License, or (at your option) any later version.
  13  *
  14  * This library is distributed in the hope that it will be useful, but
  15  * WITHOUT ANY WARRANTY; without even the implied warranty of
  16  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  17  * Lesser General Public License for more details.
  18  *
  19  * You should have received a copy of the GNU Lesser General Public
  20  * License along with this library; if not, write to the Free Software
  21  * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301,
  22  * USA
  23  *
  24  */
  25
  26 int _gnutls_base64_encode (const uint8_t * data, size_t data_size,
  27                            uint8_t ** result);
  28 int _gnutls_fbase64_encode (const char *msg, const uint8_t * data,
  29                             int data_size, uint8_t ** result);
  30 int _gnutls_base64_decode (const uint8_t * data, size_t data_size,
  31                            uint8_t ** result);
  32 int _gnutls_fbase64_decode (const char *header, const uint8_t * data,
  33                             size_t data_size, uint8_t ** result);
  34
  35 #define B64SIZE( data_size) ((data_size%3==0)?((data_size*4)/3):(4+((data_size/3)*4)))
  36
  37 /* The size for B64 encoding + newlines plus header
  38  */
  39
  40 #define HEADSIZE( hsize) \
  41         sizeof("-----BEGIN ")-1+sizeof("-----")-1+ \
  42         sizeof("\n-----END ")-1+sizeof("-----\n")-1+hsize+hsize
  43
  44 #define B64FSIZE( hsize, dsize) \
  45         (B64SIZE(dsize) + HEADSIZE(hsize) + /*newlines*/ \
  46         B64SIZE(dsize)/64 + (((B64SIZE(dsize) % 64) > 0) ? 1 : 0))