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Swarm hash.

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This commit is contained in:
chriseth 2016-11-14 14:24:19 +01:00
parent 58e75c7a48
commit 2f83a45577
1 changed files with 8 additions and 0 deletions
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8
libdevcore/SHA3.h
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@ -53,4 +53,12 @@ inline std::string keccak256(std::string const& _input, bool _isNibbles) { retur
/// Calculate SHA3-256 MAC
inline void keccak256mac(bytesConstRef _secret, bytesConstRef _plain, bytesRef _output) { keccak256(_secret.toBytes() + _plain.toBytes()).ref().populate(_output); }
h256 swarmHash(bytes const& _data)
{
bytes size(8);
for (size_t i = 0; i < 8; ++i)
size[i] = (_data.size() >> (8 * i)) & 0xff;
return keccak256(size + _data);
}
}