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#ifndef BASE64_H
#define BASE64_H
/*
* Redistribution and use in source and binary forms, with or
* without modification, are permitted provided that the following
* conditions are met:
*
* 1. Redistributions of source code must retain the above
* copyright notice, this list of conditions and the
* following disclaimer.
*
* 2. Redistributions in binary form must reproduce the above
* copyright notice, this list of conditions and the following
* disclaimer in the documentation and/or other materials
* provided with the distribution.
*
* THIS SOFTWARE IS PROVIDED BY <COPYRIGHT HOLDER> ``AS IS'' AND
* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
* TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
* A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL
* <COPYRIGHT HOLDER> OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT,
* INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
* SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR
* BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF
* LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF
* THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
* SUCH DAMAGE.
*/
/*
* This is part of the libb64 project, and has been placed in the
* public domain. For details, see
* http://sourceforge.net/projects/libb64
*/
#ifdef __cplusplus
extern "C" {
#endif
#define BASE64_CHARS_PER_LINE 72
static inline int
base64_bufsize(int binsize)
{
int datasize = binsize * 4/3 + 4;
int newlines = ((datasize + BASE64_CHARS_PER_LINE - 1)/
BASE64_CHARS_PER_LINE);
return datasize + newlines;
}
/**
* Encode a binary stream into BASE64 text.
*
* @pre the buffer size is at least 4/3 of the stream
* size + stream_size/72 (newlines) + 4
*
* @param[in] in_bin the binary input stream to decode
* @param[in] in_len size of the input
* @param[out] out_base64 output buffer for the encoded data
* @param[in] out_len buffer size, must be at least
* 4/3 of the input size
*
* @return the size of encoded output
*/
int
base64_encode(const char *in_bin, int in_len,
char *out_base64, int out_len);
/**
* Decode a BASE64 text into a binary
*
* @param[in] in_base64 the BASE64 stream to decode
* @param[in] in_len size of the input
* @param[out] out_bin output buffer size
* @param[in] out_len buffer size
*
* @pre the output buffer size must be at least
* 3/4 + 1 of the size of the input
*
* @return the size of decoded output
*/
int base64_decode(const char *in_base64, int in_len,
char *out_bin, int out_len);
#ifdef __cplusplus
} /* extern "C" */
#endif
#endif /* BASE64_H */
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