src/src/pdkim/polarssl/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 #ifndef POLARSSL_BASE64_H
  26 #define POLARSSL_BASE64_H
  27
  28 #define POLARSSL_ERR_BASE64_BUFFER_TOO_SMALL               0x0010
  29 #define POLARSSL_ERR_BASE64_INVALID_CHARACTER              0x0012
  30
  31 #ifdef __cplusplus
  32 extern "C" {
  33 #endif
  34
  35 /**
  36  * \brief          Encode a buffer into base64 format
  37  *
  38  * \param dst      destination buffer
  39  * \param dlen     size of the buffer
  40  * \param src      source buffer
  41  * \param slen     amount of data to be encoded
  42  *
  43  * \return         0 if successful, or POLARSSL_ERR_BASE64_BUFFER_TOO_SMALL.
  44  *                 *dlen is always updated to reflect the amount
  45  *                 of data that has (or would have) been written.
  46  *
  47  * \note           Call this function with *dlen = 0 to obtain the
  48  *                 required buffer size in *dlen
  49  */
  50 int base64_encode( unsigned char *dst, int *dlen,
  51                    const unsigned char *src, int  slen );
  52
  53 /**
  54  * \brief          Decode a base64-formatted buffer
  55  *
  56  * \param dst      destination buffer
  57  * \param dlen     size of the buffer
  58  * \param src      source buffer
  59  * \param slen     amount of data to be decoded
  60  *
  61  * \return         0 if successful, POLARSSL_ERR_BASE64_BUFFER_TOO_SMALL, or
  62  *                 POLARSSL_ERR_BASE64_INVALID_DATA if the input data is not
  63  *                 correct. *dlen is always updated to reflect the amount
  64  *                 of data that has (or would have) been written.
  65  *
  66  * \note           Call this function with *dlen = 0 to obtain the
  67  *                 required buffer size in *dlen
  68  */
  69 int base64_decode( unsigned char *dst, int *dlen,
  70                    const unsigned char *src, int  slen );
  71
  72 /**
  73  * \brief          Checkup routine
  74  *
  75  * \return         0 if successful, or 1 if the test failed
  76  */
  77 int base64_self_test( int verbose );
  78
  79 #ifdef __cplusplus
  80 }
  81 #endif
  82
  83 #endif /* base64.h */