Steven Wroblewski
4df328243c
FNV-1a für Zustandsprüfsummen und SplitMix64 als einzige Zufallsquelle des Kerns. Beide sind gegen veröffentlichte Referenzwerte geprüft. Co-Authored-By: Claude Haiku 4.5 <noreply@anthropic.com>
18 lines
497 B
Rust
18 lines
497 B
Rust
//! FNV-1a hashing for state checksums.
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//!
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//! The hash only has to reveal accidental divergence between peers. It is
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//! not meant to resist tampering.
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const FNV_OFFSET_BASIS: u64 = 0xcbf2_9ce4_8422_2325;
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const FNV_PRIME: u64 = 0x0000_0100_0000_01b3;
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/// Returns the 64-bit FNV-1a hash of `bytes`.
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pub fn fnv1a64(bytes: &[u8]) -> u64 {
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let mut hash = FNV_OFFSET_BASIS;
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for &byte in bytes {
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hash ^= u64::from(byte);
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hash = hash.wrapping_mul(FNV_PRIME);
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}
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hash
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}
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