Line data Source code
1 : // Copyright (c) 2014 The Bitcoin 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 <string.h> 8 : 9 114137 : CHMAC_SHA512::CHMAC_SHA512(const unsigned char* key, size_t keylen) 10 : { 11 114137 : unsigned char rkey[128]; 12 114137 : if (keylen <= 128) { 13 114134 : memcpy(rkey, key, keylen); 14 114134 : memset(rkey + keylen, 0, 128 - keylen); 15 : } else { 16 3 : CSHA512().Write(key, keylen).Finalize(rkey); 17 3 : memset(rkey + 64, 0, 64); 18 : } 19 : 20 14723670 : for (int n = 0; n < 128; n++) 21 14609540 : rkey[n] ^= 0x5c; 22 114137 : outer.Write(rkey, 128); 23 : 24 14723670 : for (int n = 0; n < 128; n++) 25 14609540 : rkey[n] ^= 0x5c ^ 0x36; 26 114137 : inner.Write(rkey, 128); 27 114137 : } 28 : 29 117668 : void CHMAC_SHA512::Finalize(unsigned char hash[OUTPUT_SIZE]) 30 : { 31 117668 : unsigned char temp[64]; 32 117668 : inner.Finalize(temp); 33 117668 : outer.Write(temp, 64).Finalize(hash); 34 117668 : }