Line data    Source code

       1             : // Copyright (c) 2014-2018 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 <string.h>
       8             : 
       9      322952 : CHMAC_SHA512::CHMAC_SHA512(const unsigned char* key, size_t keylen)
      10      161476 : {
      11      161476 :     unsigned char rkey[128];
      12      161476 :     if (keylen <= 128) {
      13      161473 :         memcpy(rkey, key, keylen);
      14      161473 :         memset(rkey + keylen, 0, 128 - keylen);
      15      161473 :     } else {
      16           3 :         CSHA512().Write(key, keylen).Finalize(rkey);
      17           3 :         memset(rkey + 64, 0, 64);
      18             :     }
      19             : 
      20    20830404 :     for (int n = 0; n < 128; n++)
      21    20668928 :         rkey[n] ^= 0x5c;
      22      161476 :     outer.Write(rkey, 128);
      23             : 
      24    20830404 :     for (int n = 0; n < 128; n++)
      25    20668928 :         rkey[n] ^= 0x5c ^ 0x36;
      26      161476 :     inner.Write(rkey, 128);
      27      322952 : }
      28             : 
      29      165061 : void CHMAC_SHA512::Finalize(unsigned char hash[OUTPUT_SIZE])
      30             : {
      31      165061 :     unsigned char temp[64];
      32      165061 :     inner.Finalize(temp);
      33      165061 :     outer.Write(temp, 64).Finalize(hash);
      34      165061 : }