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77 lines
1.8 KiB
C
77 lines
1.8 KiB
C
/* Sha1.h -- SHA-1 Hash
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2021-02-08 : Igor Pavlov : Public domain */
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#ifndef __7Z_SHA1_H
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#define __7Z_SHA1_H
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#include "7zTypes.h"
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EXTERN_C_BEGIN
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#define SHA1_NUM_BLOCK_WORDS 16
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#define SHA1_NUM_DIGEST_WORDS 5
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#define SHA1_BLOCK_SIZE (SHA1_NUM_BLOCK_WORDS * 4)
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#define SHA1_DIGEST_SIZE (SHA1_NUM_DIGEST_WORDS * 4)
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typedef void (MY_FAST_CALL *SHA1_FUNC_UPDATE_BLOCKS)(UInt32 state[5], const Byte *data, size_t numBlocks);
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/*
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if (the system supports different SHA1 code implementations)
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{
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(CSha1::func_UpdateBlocks) will be used
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(CSha1::func_UpdateBlocks) can be set by
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Sha1_Init() - to default (fastest)
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Sha1_SetFunction() - to any algo
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}
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else
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{
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(CSha1::func_UpdateBlocks) is ignored.
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}
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*/
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typedef struct
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{
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SHA1_FUNC_UPDATE_BLOCKS func_UpdateBlocks;
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UInt64 count;
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UInt64 __pad_2[2];
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UInt32 state[SHA1_NUM_DIGEST_WORDS];
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UInt32 __pad_3[3];
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Byte buffer[SHA1_BLOCK_SIZE];
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} CSha1;
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#define SHA1_ALGO_DEFAULT 0
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#define SHA1_ALGO_SW 1
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#define SHA1_ALGO_HW 2
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/*
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Sha1_SetFunction()
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return:
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0 - (algo) value is not supported, and func_UpdateBlocks was not changed
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1 - func_UpdateBlocks was set according (algo) value.
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*/
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BoolInt Sha1_SetFunction(CSha1 *p, unsigned algo);
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void Sha1_InitState(CSha1 *p);
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void Sha1_Init(CSha1 *p);
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void Sha1_Update(CSha1 *p, const Byte *data, size_t size);
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void Sha1_Final(CSha1 *p, Byte *digest);
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void Sha1_PrepareBlock(const CSha1 *p, Byte *block, unsigned size);
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void Sha1_GetBlockDigest(const CSha1 *p, const Byte *data, Byte *destDigest);
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// void MY_FAST_CALL Sha1_UpdateBlocks(UInt32 state[5], const Byte *data, size_t numBlocks);
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/*
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call Sha1Prepare() once at program start.
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It prepares all supported implementations, and detects the fastest implementation.
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*/
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void Sha1Prepare(void);
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EXTERN_C_END
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#endif
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