diff options
Diffstat (limited to 'src/hash.cpp')
| -rw-r--r-- | src/hash.cpp | 14 |
1 files changed, 12 insertions, 2 deletions
diff --git a/src/hash.cpp b/src/hash.cpp index 83b90ae063..cc46043c2b 100644 --- a/src/hash.cpp +++ b/src/hash.cpp @@ -1,4 +1,4 @@ -// Copyright (c) 2013-2018 The Bitcoin Core developers +// Copyright (c) 2013-2020 The Bitcoin Core developers // Distributed under the MIT software license, see the accompanying // file COPYING or http://www.opensource.org/licenses/mit-license.php. @@ -6,6 +6,7 @@ #include <crypto/common.h> #include <crypto/hmac_sha512.h> +#include <string> inline uint32_t ROTL32(uint32_t x, int8_t r) { @@ -14,7 +15,7 @@ inline uint32_t ROTL32(uint32_t x, int8_t r) unsigned int MurmurHash3(unsigned int nHashSeed, Span<const unsigned char> vDataToHash) { - // The following is MurmurHash3 (x86_32), see http://code.google.com/p/smhasher/source/browse/trunk/MurmurHash3.cpp + // The following is MurmurHash3 (x86_32), see https://code.google.com/p/smhasher/source/browse/trunk/MurmurHash3.cpp uint32_t h1 = nHashSeed; const uint32_t c1 = 0xcc9e2d51; const uint32_t c2 = 0x1b873593; @@ -84,3 +85,12 @@ uint256 SHA256Uint256(const uint256& input) CSHA256().Write(input.begin(), 32).Finalize(result.begin()); return result; } + +CHashWriter TaggedHash(const std::string& tag) +{ + CHashWriter writer(SER_GETHASH, 0); + uint256 taghash; + CSHA256().Write((const unsigned char*)tag.data(), tag.size()).Finalize(taghash.begin()); + writer << taghash << taghash; + return writer; +} |