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author | Wladimir J. van der Laan <laanwj@gmail.com> | 2014-12-01 14:57:49 +0100 |
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committer | Wladimir J. van der Laan <laanwj@gmail.com> | 2014-12-01 14:57:58 +0100 |
commit | f0877f8b6200dcf6df12df5e69d498d365f81f8b (patch) | |
tree | dc5f63386a9c0752a62301a815d6a976286a1b42 /src/crypto/hmac_sha512.cpp | |
parent | 89151d9f29870cc9246f76baba75b75d3a7528d7 (diff) | |
parent | 4cdaa95a209808276992dc1eb0ed0773f7927073 (diff) | |
download | bitcoin-f0877f8b6200dcf6df12df5e69d498d365f81f8b.tar.xz |
Merge pull request #5227
4cdaa95 Resize after succesful result (Pieter Wuille)
9d8604f Header define style cleanups (Pieter Wuille)
a53fd41 Deterministic signing (Pieter Wuille)
3060e36 Add the RFC6979 PRNG (Pieter Wuille)
a8f5087 Add HMAC-SHA256 (Pieter Wuille)
36fa4a7 Split up crypto/sha2 (Pieter Wuille)
Diffstat (limited to 'src/crypto/hmac_sha512.cpp')
-rw-r--r-- | src/crypto/hmac_sha512.cpp | 34 |
1 files changed, 34 insertions, 0 deletions
diff --git a/src/crypto/hmac_sha512.cpp b/src/crypto/hmac_sha512.cpp new file mode 100644 index 0000000000..940a93277c --- /dev/null +++ b/src/crypto/hmac_sha512.cpp @@ -0,0 +1,34 @@ +// Copyright (c) 2014 The Bitcoin developers +// Distributed under the MIT software license, see the accompanying +// file COPYING or http://www.opensource.org/licenses/mit-license.php. + +#include "crypto/hmac_sha512.h" + +#include <string.h> + +CHMAC_SHA512::CHMAC_SHA512(const unsigned char* key, size_t keylen) +{ + unsigned char rkey[128]; + if (keylen <= 128) { + memcpy(rkey, key, keylen); + memset(rkey + keylen, 0, 128 - keylen); + } else { + CSHA512().Write(key, keylen).Finalize(rkey); + memset(rkey + 64, 0, 64); + } + + for (int n = 0; n < 128; n++) + rkey[n] ^= 0x5c; + outer.Write(rkey, 128); + + for (int n = 0; n < 128; n++) + rkey[n] ^= 0x5c ^ 0x36; + inner.Write(rkey, 128); +} + +void CHMAC_SHA512::Finalize(unsigned char hash[OUTPUT_SIZE]) +{ + unsigned char temp[64]; + inner.Finalize(temp); + outer.Write(temp, 64).Finalize(hash); +} |