99 lines
3.1 KiB
C
99 lines
3.1 KiB
C
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// SPDX-License-Identifier: Apache-2.0
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/*
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* FIPS-180-2 compliant SHA-384/512 implementation
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*
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* Copyright (c) 2019 Fuzhou Rockchip Electronics Co., Ltd
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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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* This file is part of mbed TLS (https://tls.mbed.org)
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*/
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/*
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* The SHA-512 Secure Hash Standard was published by NIST in 2002.
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*
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* http://csrc.nist.gov/publications/fips/fips180-2/fips180-2.pdf
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*/
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#ifndef _SHA512_H
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#define _SHA512_H
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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 The SHA-512 context structure.
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*
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* The structure is used both for SHA-384 and for SHA-512
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* checksum calculations. The choice between these two is
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* made in the call to sha512_starts().
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*/
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typedef struct sha512_context {
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uint64_t total[2]; /*!< The number of Bytes processed. */
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uint64_t state[8]; /*!< The intermediate digest state. */
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unsigned char buffer[128]; /*!< The data block being processed. */
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int is384; /*!< Determines which function to use:
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0: Use SHA-512, or 1: Use SHA-384. */
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} sha512_context;
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/**
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* \brief This function starts a SHA-384 or SHA-512 checksum
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* calculation.
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*
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* \param ctx The SHA-512 context to initialize.
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* \param is384 Determines which function to use:
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* 0: Use SHA-512, or 1: Use SHA-384.
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*
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* \return \c 0 on success.
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*/
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int sha512_starts(sha512_context *ctx);
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/**
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* \brief This function feeds an input buffer into an ongoing
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* SHA-512 checksum calculation.
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*
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* \param ctx The SHA-512 context.
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* \param input The buffer holding the input data.
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* \param ilen The length of the input data.
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*
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* \return \c 0 on success.
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*/
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int sha512_update(sha512_context *ctx, const unsigned char *input, size_t ilen);
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/**
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* \brief This function finishes the SHA-512 operation, and writes
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* the result to the output buffer.
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*
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* \param ctx The SHA-512 context.
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* \param output The SHA-384 or SHA-512 checksum result.
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*
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* \return \c 0 on success.
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*/
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int sha512_finish(sha512_context *ctx, unsigned char output[64]);
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/**
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* \brief This function starts SHA-512 checksum for the input data.
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*
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* \param input The buffer holding the input data.
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* \param ilen The length of the input data.
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* \param output The SHA-384 or SHA-512 checksum result.
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*/
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void sha512_csum(const unsigned char *input, unsigned int ilen,
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unsigned char output[64]);
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#ifdef __cplusplus
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}
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#endif
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#endif /* sha512.h */
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