Bitcoin ABC  0.24.7
P2P Digital Currency
hmac_sha512.cpp
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1 // Copyright (c) 2014 The Bitcoin Core developers
2 // Distributed under the MIT software license, see the accompanying
3 // file COPYING or http://www.opensource.org/licenses/mit-license.php.
4 
5 #include <crypto/hmac_sha512.h>
6 
7 #include <cstring>
8 
9 CHMAC_SHA512::CHMAC_SHA512(const uint8_t *key, size_t keylen) {
10  uint8_t rkey[128];
11  if (keylen <= 128) {
12  memcpy(rkey, key, keylen);
13  memset(rkey + keylen, 0, 128 - keylen);
14  } else {
15  CSHA512().Write(key, keylen).Finalize(rkey);
16  memset(rkey + 64, 0, 64);
17  }
18 
19  for (int n = 0; n < 128; n++) {
20  rkey[n] ^= 0x5c;
21  }
22  outer.Write(rkey, 128);
23 
24  for (int n = 0; n < 128; n++) {
25  rkey[n] ^= 0x5c ^ 0x36;
26  }
27  inner.Write(rkey, 128);
28 }
29 
30 void CHMAC_SHA512::Finalize(uint8_t hash[OUTPUT_SIZE]) {
31  uint8_t temp[64];
32  inner.Finalize(temp);
33  outer.Write(temp, 64).Finalize(hash);
34 }
hmac_sha512.h
CHMAC_SHA512::Finalize
void Finalize(uint8_t hash[OUTPUT_SIZE])
Definition: hmac_sha512.cpp:30
CSHA512::Finalize
void Finalize(uint8_t hash[OUTPUT_SIZE])
Definition: sha512.cpp:273
CHMAC_SHA512::outer
CSHA512 outer
Definition: hmac_sha512.h:16
CHMAC_SHA512::inner
CSHA512 inner
Definition: hmac_sha512.h:17
CSHA512
A hasher class for SHA-512.
Definition: sha512.h:12
CHMAC_SHA512::CHMAC_SHA512
CHMAC_SHA512(const uint8_t *key, size_t keylen)
Definition: hmac_sha512.cpp:9
CSHA512::Write
CSHA512 & Write(const uint8_t *data, size_t len)
Definition: sha512.cpp:248