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87 lines
3 KiB
C
87 lines
3 KiB
C
/**
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* \file base64.h
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*
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* \brief RFC 1521 base64 encoding/decoding
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*
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* Copyright (C) 2006-2013, ARM Limited, All Rights Reserved
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*
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* This file is part of mbed TLS (https://tls.mbed.org)
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation; either version 2 of the License, or
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* (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License along
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* with this program; if not, write to the Free Software Foundation, Inc.,
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* 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
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*/
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#ifndef POLARSSL_BASE64_H
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#define POLARSSL_BASE64_H
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#include <stddef.h>
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#define POLARSSL_ERR_BASE64_BUFFER_TOO_SMALL -0x002A /**< Output buffer too small. */
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#define POLARSSL_ERR_BASE64_INVALID_CHARACTER -0x002C /**< Invalid character in input. */
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#ifdef __cplusplus
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extern "C" {
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#endif
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/**
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* \brief Encode a buffer into base64 format
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*
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* \param dst destination buffer
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* \param dlen size of the buffer
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* \param src source buffer
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* \param slen amount of data to be encoded
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*
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* \return 0 if successful, or POLARSSL_ERR_BASE64_BUFFER_TOO_SMALL.
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* *dlen is always updated to reflect the amount
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* of data that has (or would have) been written.
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* If that length cannot be represented, then no data is
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* written to the buffer and *dlen is set to SIZE_T_MAX.
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*
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* \note Call this function with *dlen = 0 to obtain the
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* required buffer size in *dlen
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*/
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int base64_encode( unsigned char *dst, size_t *dlen,
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const unsigned char *src, size_t slen );
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/**
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* \brief Decode a base64-formatted buffer
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*
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* \param dst destination buffer (can be NULL for checking size)
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* \param dlen size of the buffer
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* \param src source buffer
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* \param slen amount of data to be decoded
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*
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* \return 0 if successful, POLARSSL_ERR_BASE64_BUFFER_TOO_SMALL, or
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* POLARSSL_ERR_BASE64_INVALID_CHARACTER if the input data is
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* not correct. *dlen is always updated to reflect the amount
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* of data that has (or would have) been written.
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*
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* \note Call this function with *dst = NULL or *dlen = 0 to obtain
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* the required buffer size in *dlen
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*/
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int base64_decode( unsigned char *dst, size_t *dlen,
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const unsigned char *src, size_t slen );
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/**
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* \brief Checkup routine
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*
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* \return 0 if successful, or 1 if the test failed
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*/
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int base64_self_test( int verbose );
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#ifdef __cplusplus
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}
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#endif
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#endif /* base64.h */
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