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/* Copyright (C) CZ.NIC, z.s.p.o. <knot-dns@labs.nic.cz>
* SPDX-License-Identifier: GPL-3.0-or-later
*/
/*!
* \file
*
* \brief Base64 implementation (RFC 4648).
*
* \addtogroup contrib
* @{
*/
#pragma once
#include <stdint.h>
/*!
* \brief Encodes binary data using Base64.
*
* \note Output data buffer contains Base64 text string which isn't
* terminated with '\0'!
*
* \param in Input binary data.
* \param in_len Length of input data.
* \param out Output data buffer.
* \param out_len Size of output buffer.
*
* \retval >=0 length of output string.
* \retval KNOT_E* if error.
*/
int32_t kr_base64_encode(const uint8_t *in,
const uint32_t in_len,
uint8_t *out,
const uint32_t out_len);
/*!
* \brief Encodes binary data using Base64 and output stores to own buffer.
*
* \note Output data buffer contains Base64 text string which isn't
* terminated with '\0'!
*
* \note Output buffer should be deallocated after use.
*
* \param in Input binary data.
* \param in_len Length of input data.
* \param out Output data buffer.
*
* \retval >=0 length of output string.
* \retval KNOT_E* if error.
*/
int32_t kr_base64_encode_alloc(const uint8_t *in,
const uint32_t in_len,
uint8_t **out);
/*!
* \brief Decodes text data using Base64.
*
* \note Input data needn't be terminated with '\0'.
*
* \note Input data must be continuous Base64 string!
*
* \param in Input text data.
* \param in_len Length of input string.
* \param out Output data buffer.
* \param out_len Size of output buffer.
*
* \retval >=0 length of output data.
* \retval KNOT_E* if error.
*/
int32_t kr_base64_decode(const uint8_t *in,
const uint32_t in_len,
uint8_t *out,
const uint32_t out_len);
/*!
* \brief Decodes text data using Base64 and output stores to own buffer.
*
* \note Input data needn't be terminated with '\0'.
*
* \note Input data must be continuous Base64 string!
*
* \note Output buffer should be deallocated after use.
*
* \param in Input text data.
* \param in_len Length of input string.
* \param out Output data buffer.
*
* \retval >=0 length of output data.
* \retval KNOT_E* if error.
*/
int32_t kr_base64_decode_alloc(const uint8_t *in,
const uint32_t in_len,
uint8_t **out);
/*! @} */
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