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95 lines
3.1 KiB
C
95 lines
3.1 KiB
C
/**
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* \file base64.h
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*
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* \brief RFC 1521 base64 encoding/decoding
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*/
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/*
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* Copyright The Mbed TLS Contributors
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* SPDX-License-Identifier: Apache-2.0
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*
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* Licensed under the Apache License, Version 2.0 (the "License"); you may
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* not use this file except in compliance with the License.
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* You may obtain a copy of the License at
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
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* WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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* See the License for the specific language governing permissions and
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* limitations under the License.
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*/
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#ifndef MBEDTLS_BASE64_H
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#define MBEDTLS_BASE64_H
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#include "mbedtls/build_info.h"
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#include <stddef.h>
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/** Output buffer too small. */
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#define MBEDTLS_ERR_BASE64_BUFFER_TOO_SMALL -0x002A
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/** Invalid character in input. */
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#define MBEDTLS_ERR_BASE64_INVALID_CHARACTER -0x002C
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#ifdef __cplusplus
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extern "C" {
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#endif
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/**
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* \brief Encode a buffer into base64 format
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*
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* \param dst destination buffer
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* \param dlen size of the destination buffer
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* \param olen number of bytes written
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* \param src source buffer
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* \param slen amount of data to be encoded
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*
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* \return 0 if successful, or MBEDTLS_ERR_BASE64_BUFFER_TOO_SMALL.
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* *olen is always updated to reflect the amount
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* of data that has (or would have) been written.
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* If that length cannot be represented, then no data is
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* written to the buffer and *olen is set to the maximum
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* length representable as a size_t.
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*
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* \note Call this function with dlen = 0 to obtain the
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* required buffer size in *olen
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*/
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int mbedtls_base64_encode( unsigned char *dst, size_t dlen, size_t *olen,
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const unsigned char *src, size_t slen );
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/**
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* \brief Decode a base64-formatted buffer
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*
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* \param dst destination buffer (can be NULL for checking size)
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* \param dlen size of the destination buffer
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* \param olen number of bytes written
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* \param src source buffer
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* \param slen amount of data to be decoded
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*
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* \return 0 if successful, MBEDTLS_ERR_BASE64_BUFFER_TOO_SMALL, or
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* MBEDTLS_ERR_BASE64_INVALID_CHARACTER if the input data is
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* not correct. *olen is always updated to reflect the amount
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* of data that has (or would have) been written.
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*
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* \note Call this function with *dst = NULL or dlen = 0 to obtain
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* the required buffer size in *olen
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*/
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int mbedtls_base64_decode( unsigned char *dst, size_t dlen, size_t *olen,
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const unsigned char *src, size_t slen );
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#if defined(MBEDTLS_SELF_TEST)
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/**
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* \brief Checkup routine
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*
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* \return 0 if successful, or 1 if the test failed
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*/
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int mbedtls_base64_self_test( int verbose );
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#endif /* MBEDTLS_SELF_TEST */
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#ifdef __cplusplus
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}
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#endif
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#endif /* base64.h */
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