83 lines
2.9 KiB
C
83 lines
2.9 KiB
C
/**
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* @copyright
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*
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* Tencent is pleased to support the open source community by making IoT Hub available.
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* Copyright(C) 2018 - 2021 THL A29 Limited, a Tencent company.All rights reserved.
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*
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* Licensed under the MIT License(the "License"); you may not use this file except in
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* compliance with the License. You may obtain a copy of the License at
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* http://opensource.org/licenses/MIT
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*
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* Unless required by applicable law or agreed to in writing, software distributed under the License is
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* distributed on an "AS IS" basis, WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND,
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* either express or implied. 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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* @file utils_base64.h
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* @brief utils base64 header file
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* @author fancyxu (fancyxu@tencent.com)
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* @version 1.0
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* @date 2021-05-28
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*
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* @par Change Log:
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* <table>
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* <tr><th>Date <th>Version <th>Author <th>Description
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* <tr><td>2021-05-28 <td>1.0 <td>fancyxu <td>first commit
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* </table>
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*/
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#ifndef IOT_HUB_DEVICE_C_SDK_COMMON_CRYPTOLOGY_INC_UTILS_BASE64_H_
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#define IOT_HUB_DEVICE_C_SDK_COMMON_CRYPTOLOGY_INC_UTILS_BASE64_H_
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#ifdef __cplusplus
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extern "C" {
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#endif
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#include <stdio.h>
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#include <stdint.h>
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#include <stdlib.h>
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/**
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* @brief Encode a buffer into base64 format.
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*
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* @param[out] dst destination buffer
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* @param[in] dlen size of the destination buffer
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* @param[out] olen number of bytes written
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* @param[in] src source buffer
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* @param[in] slen amount of data to be encoded
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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 utils_base64encode(unsigned char *dst, size_t dlen, size_t *olen, 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[out] dst destination buffer (can be NULL for checking size)
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* @param[in] dlen size of the destination buffer
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* @param[out] olen number of bytes written
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* @param[in] src source buffer
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* @param[in] slen amount of data to be decoded
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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 utils_base64decode(unsigned char *dst, size_t dlen, size_t *olen, const unsigned char *src, size_t slen);
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#ifdef __cplusplus
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}
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#endif
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#endif // IOT_HUB_DEVICE_C_SDK_COMMON_CRYPTOLOGY_INC_UTILS_BASE64_H_
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