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test: add shared SipHash vectors

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Lock SipHash-2-4 behavior into shared vectors before refactoring its round and finalization code.
Store inputs as ordered hex byte blocks so `CSipHasher` and the independent Python implementation hash the same byte sequence, with applicable `PresaltedSipHasher` overloads checked against the same vectors.
Add the 64 official SipHash-2-4 vectors alongside block-partition and empty-block cases for the generic path.
Move randomized generic/fixed comparisons to the integer fuzzer.

SipHash-1-3-UJ coverage can add expected outputs for compatible 8- and 32-byte block sequences.
The Python test reads a build-tree copy so functional-test staging behaves consistently when files are symlinked or copied.

Co-authored-by: Pieter Wuille <pieter@wuille.net>
This commit is contained in:
Lőrinc
2026-07-15 15:15:15 -07:00
parent 18c05d9301
commit af50ba8500
7 changed files with 797 additions and 23 deletions
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13
src/test/fuzz/integer.cpp
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@@ -67,6 +67,7 @@ FUZZ_TARGET(integer, .init = initialize_integer)
// ConsumeIntegral<char>() instead of casting from {u,}int8_t.
const char ch = fuzzed_data_provider.ConsumeIntegral<char>();
const bool b = fuzzed_data_provider.ConsumeBool();
const uint64_t u64_2{fuzzed_data_provider.ConsumeIntegral<uint64_t>()};
const Consensus::Params& consensus_params = Params().GetConsensus();
(void)CheckProofOfWorkImpl(u256, u32, consensus_params);
@@ -118,8 +119,16 @@ FUZZ_TARGET(integer, .init = initialize_integer)
}
(void)MillisToTimeval(i64);
(void)SighashToStr(uch);
(void)PresaltedSipHasher(u64, u64)(u256);
(void)PresaltedSipHasher(u64, u64)(u256, u32);
{
CSipHasher hasher{u64, u64_2};
const PresaltedSipHasher presalted_hasher{u64, u64_2};
hasher.Write(u256);
assert(presalted_hasher(u256) == hasher.Finalize());
uint8_t extra[4]{};
WriteLE32(extra, u32);
hasher.Write(extra);
assert(presalted_hasher(u256, u32) == hasher.Finalize());
}
(void)ToLower(ch);
(void)ToUpper(ch);
{