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/*
* RFC 1521 base64 encoding/decoding
*
* Copyright (C) 2018, Nordic Semiconductor ASA
* Copyright (C) 2006-2015, ARM Limited, All Rights Reserved
* SPDX-License-Identifier: Apache-2.0
*
* Licensed under the Apache License, Version 2.0 (the "License"); you may
* not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
* WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*
* Adapted for Zephyr by Carles Cufi (carles.cufi@nordicsemi.no)
* - Removed mbedtls_ prefixes
* - Reworked coding style
*/
#ifndef ZEPHYR_INCLUDE_SYS_BASE64_H_
#define ZEPHYR_INCLUDE_SYS_BASE64_H_
#include <stddef.h>
#include <zephyr/types.h>
#ifdef __cplusplus
extern "C" {
#endif
/**
* @brief Encode a buffer into base64 format
*
* @param dst destination buffer
* @param dlen size of the destination buffer
* @param olen number of bytes written
* @param src source buffer
* @param slen amount of data to be encoded
*
* @return 0 if successful, or -ENOMEM if the buffer is too small.
* *olen is always updated to reflect the amount
* of data that has (or would have) been written.
* If that length cannot be represented, then no data is
* written to the buffer and *olen is set to the maximum
* length representable as a size_t.
*
* @note Call this function with dlen = 0 to obtain the
* required buffer size in *olen
*/
int base64_encode(uint8_t *dst, size_t dlen, size_t *olen, const uint8_t *src,
size_t slen);
/**
* @brief Decode a base64-formatted buffer
*
* @param dst destination buffer (can be NULL for checking size)
* @param dlen size of the destination buffer
* @param olen number of bytes written
* @param src source buffer
* @param slen amount of data to be decoded
*
* @return 0 if successful, -ENOMEM, or -EINVAL if the input data is
* not correct. *olen is always updated to reflect the amount
* of data that has (or would have) been written.
*
* @note Call this function with *dst = NULL or dlen = 0 to obtain
* the required buffer size in *olen
*/
int base64_decode(uint8_t *dst, size_t dlen, size_t *olen, const uint8_t *src,
size_t slen);
#ifdef __cplusplus
}
#endif
#endif /* ZEPHYR_INCLUDE_SYS_BASE64_H_ */