src/pdkim/base64.h

   1 /**
   2  * \file base64.h
   3  *
   4  *  Copyright (C) 2006-2010, Brainspark B.V.
   5  *
   6  *  This file is part of PolarSSL (http://www.polarssl.org)
   7  *  Lead Maintainer: Paul Bakker <polarssl_maintainer at polarssl.org>
   8  *
   9  *  All rights reserved.
  10  *
  11  *  This program is free software; you can redistribute it and/or modify
  12  *  it under the terms of the GNU General Public License as published by
  13  *  the Free Software Foundation; either version 2 of the License, or
  14  *  (at your option) any later version.
  15  *
  16  *  This program is distributed in the hope that it will be useful,
  17  *  but WITHOUT ANY WARRANTY; without even the implied warranty of
  18  *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  19  *  GNU General Public License for more details.
  20  *
  21  *  You should have received a copy of the GNU General Public License along
  22  *  with this program; if not, write to the Free Software Foundation, Inc.,
  23  *  51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
  24  */
  25
  26 #ifndef POLARSSL_BASE64_H
  27 #define POLARSSL_BASE64_H
  28
  29 #define POLARSSL_ERR_BASE64_BUFFER_TOO_SMALL               0x0010
  30 #define POLARSSL_ERR_BASE64_INVALID_CHARACTER              0x0012
  31
  32 #ifdef __cplusplus
  33 extern "C" {
  34 #endif
  35
  36 /**
  37  * \brief          Encode a buffer into base64 format
  38  *
  39  * \param dst      destination buffer
  40  * \param dlen     size of the buffer
  41  * \param src      source buffer
  42  * \param slen     amount of data to be encoded
  43  *
  44  * \return         0 if successful, or POLARSSL_ERR_BASE64_BUFFER_TOO_SMALL.
  45  *                 *dlen is always updated to reflect the amount
  46  *                 of data that has (or would have) been written.
  47  *
  48  * \note           Call this function with *dlen = 0 to obtain the
  49  *                 required buffer size in *dlen
  50  */
  51 int base64_encode( unsigned char *dst, int *dlen,
  52                    const unsigned char *src, int  slen );
  53
  54 /**
  55  * \brief          Decode a base64-formatted buffer
  56  *
  57  * \param dst      destination buffer
  58  * \param dlen     size of the buffer
  59  * \param src      source buffer
  60  * \param slen     amount of data to be decoded
  61  *
  62  * \return         0 if successful, POLARSSL_ERR_BASE64_BUFFER_TOO_SMALL, or
  63  *                 POLARSSL_ERR_BASE64_INVALID_DATA if the input data is not
  64  *                 correct. *dlen is always updated to reflect the amount
  65  *                 of data that has (or would have) been written.
  66  *
  67  * \note           Call this function with *dlen = 0 to obtain the
  68  *                 required buffer size in *dlen
  69  */
  70 int base64_decode( unsigned char *dst, int *dlen,
  71                    const unsigned char *src, int  slen );
  72
  73 #ifdef __cplusplus
  74 }
  75 #endif
  76
  77 #endif /* base64.h */