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/*
* Copyright (C) 2015 Google, Inc.
*
* This software is licensed under the terms of the GNU General Public
* License version 2, as published by the Free Software Foundation, and
* may be copied, distributed, and modified under those terms.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*/
#ifndef __INCLUDE_B64_DECODE_H__
#define __INCLUDE_B64_DECODE_H__
#include <stddef.h>
#include <stdint.h>
/*
* A function to convert a buffer of base64 format data into its source.
*
* The user provides output buffer of the size guaranteed to fit the result.
*
* Returns the size of the decoded data or zero if invalid charactes were
* encountered in the input buffer.
*/
size_t b64_decode(const uint8_t *input_data,
size_t input_length,
uint8_t *output_data);
/* A macro to derive decoded size of a base64 encoded blob. */
#define B64_DECODED_SIZE(encoded_size) (((encoded_size) * 3)/4)
#endif
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