Simone
d074cc7c07
Plugin: ns7zip v2.0.0 Architectures: x86-ansi, x86-unicode, amd64-unicode License: LGPL-2.1-or-later
54 lines
1006 B
C++
54 lines
1006 B
C++
// HmacSha256.cpp
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#include "StdAfx.h"
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#include <string.h>
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#include "../../../C/CpuArch.h"
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#include "HmacSha256.h"
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namespace NCrypto {
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namespace NSha256 {
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void CHmac::SetKey(const Byte *key, size_t keySize)
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{
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MY_ALIGN (16)
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UInt32 temp[SHA256_NUM_BLOCK_WORDS];
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size_t i;
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for (i = 0; i < SHA256_NUM_BLOCK_WORDS; i++)
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temp[i] = 0;
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if (keySize > kBlockSize)
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{
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Sha256_Init(&_sha);
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Sha256_Update(&_sha, key, keySize);
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Sha256_Final(&_sha, (Byte *)temp);
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}
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else
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memcpy(temp, key, keySize);
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for (i = 0; i < SHA256_NUM_BLOCK_WORDS; i++)
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temp[i] ^= 0x36363636;
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Sha256_Init(&_sha);
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Sha256_Update(&_sha, (const Byte *)temp, kBlockSize);
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for (i = 0; i < SHA256_NUM_BLOCK_WORDS; i++)
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temp[i] ^= 0x36363636 ^ 0x5C5C5C5C;
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Sha256_Init(&_sha2);
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Sha256_Update(&_sha2, (const Byte *)temp, kBlockSize);
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}
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void CHmac::Final(Byte *mac)
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{
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Sha256_Final(&_sha, mac);
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Sha256_Update(&_sha2, mac, SHA256_DIGEST_SIZE);
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Sha256_Final(&_sha2, mac);
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}
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}}
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