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Add specialization of SipHash for 256 + 32 bit data

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We'll need a version of SipHash for tuples of 256 bits and 32 bits
data, when CCoinsViewCache switches from using txids to COutPoints as
keys.
This commit is contained in:
Pieter Wuille
2017-04-25 11:29:16 -07:00
parent e484652fc3
commit 7e00322906
3 changed files with 59 additions and 0 deletions
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17
src/test/hash_tests.cpp
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@@ -128,6 +128,23 @@ BOOST_AUTO_TEST_CASE(siphash)
tx.nVersion = 1;
ss << tx;
BOOST_CHECK_EQUAL(SipHashUint256(1, 2, ss.GetHash()), 0x79751e980c2a0a35ULL);
// Check consistency between CSipHasher and SipHashUint256[Extra].
FastRandomContext ctx;
for (int i = 0; i < 16; ++i) {
uint64_t k1 = ctx.rand64();
uint64_t k2 = ctx.rand64();
uint256 x = GetRandHash();
uint32_t n = ctx.rand32();
uint8_t nb[4];
WriteLE32(nb, n);
CSipHasher sip256(k1, k2);
sip256.Write(x.begin(), 32);
CSipHasher sip288 = sip256;
sip288.Write(nb, 4);
BOOST_CHECK_EQUAL(SipHashUint256(k1, k2, x), sip256.Finalize());
BOOST_CHECK_EQUAL(SipHashUint256Extra(k1, k2, x, n), sip288.Finalize());
}
}
BOOST_AUTO_TEST_SUITE_END()