34 lines
899 B
C++
34 lines
899 B
C++
// Copyright (c) 2014 The Bitcoin developers
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// Distributed under the MIT software license, see the accompanying
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// file COPYING or http://www.opensource.org/licenses/mit-license.php.
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#include "crypto/hmac_sha512.h"
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#include <string.h>
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CHMAC_SHA512::CHMAC_SHA512(const unsigned char* key, size_t keylen)
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{
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unsigned char rkey[128];
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if (keylen <= 128) {
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memcpy(rkey, key, keylen);
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memset(rkey + keylen, 0, 128 - keylen);
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} else {
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CSHA512().Write(key, keylen).Finalize(rkey);
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memset(rkey + 64, 0, 64);
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}
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for (int n = 0; n < 128; n++)
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rkey[n] ^= 0x5c;
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outer.Write(rkey, 128);
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for (int n = 0; n < 128; n++)
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rkey[n] ^= 0x5c ^ 0x36;
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inner.Write(rkey, 128);
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}
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void CHMAC_SHA512::Finalize(unsigned char hash[OUTPUT_SIZE])
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{
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unsigned char temp[64];
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inner.Finalize(temp);
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outer.Write(temp, 64).Finalize(hash);
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}
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