36 lines
1.1 KiB
C
36 lines
1.1 KiB
C
/*
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* Copyright (C) 2015 Google, Inc.
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*
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* This software is licensed under the terms of the GNU General Public
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* License version 2, as published by the Free Software Foundation, and
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* may be copied, distributed, and modified under those terms.
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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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#ifndef __INCLUDE_B64_DECODE_H__
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#define __INCLUDE_B64_DECODE_H__
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#include <stddef.h>
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#include <stdint.h>
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/*
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* A function to convert a buffer of base64 format data into its source.
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*
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* The user provides output buffer of the size guaranteed to fit the result.
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*
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* Returns the size of the decoded data or zero if invalid characters were
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* encountered in the input buffer.
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*/
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size_t b64_decode(const uint8_t *input_data,
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size_t input_length,
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uint8_t *output_data);
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/* A macro to derive decoded size of a base64 encoded blob. */
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#define B64_DECODED_SIZE(encoded_size) (((encoded_size) * 3)/4)
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#endif
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