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SipHash (2-4, 1-3 + 128 bit variant) implementations for Rust
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jedisct1/rust-siphash
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This crates implements SipHash-2-4 and SipHash-1-3 in Rust.
It is based on the original implementation from rust-core and exposes thesame API.
It also implements SipHash variants returning 128-bit tags.
Thesip module implements the standard 64-bit mode, whereas thesip128module implements the 128-bit mode.
InCargo.toml:
[dependencies]siphasher ="1"
If you wantserde support, include the feature like this:
[dependencies]siphasher = {version ="1",features = ["serde"] }
64-bit mode:
use siphasher::sip::{SipHasher,SipHasher13,SipHasher24};// one-shot:let array:&[u8] =&[1,2,3];let key:&[u8;16] =&[1,2,3,4,5,6,7,8,9,10,11,12,13,14,15,16];let hasher =SipHasher13::new_with_key(key);let h = hasher.hash(array);// incremental:use core::hash::Hasher;let array1:&[u8] =&[1,2,3];let array2:&[u8] =&[4,5,6];let key:&[u8;16] =&[1,2,3,4,5,6,7,8,9,10,11,12,13,14,15,16];letmut hasher =SipHasher13::new_with_key(key);hasher.write(array1);hasher.write(array2);let h = hasher.finish();
128-bit mode:
use siphasher::sip128::{Hasher128,SipHasher,SipHasher13,SipHasher24};// one-shot:let array:&[u8] =&[1,2,3];let key:&[u8;16] =&[1,2,3,4,5,6,7,8,9,10,11,12,13,14,15,16];let hasher =SipHasher13::new_with_key(key);let h = hasher.hash(array).as_bytes();// incremental:use core::hash::Hasher;let array1:&[u8] =&[1,2,3];let array2:&[u8] =&[4,5,6];let key:&[u8;16] =&[1,2,3,4,5,6,7,8,9,10,11,12,13,14,15,16];letmut hasher =SipHasher13::new_with_key(key);hasher.write(array1);hasher.write(array2);let h = hasher.finish128().as_bytes();
Due to a confusing and not well documented API, methods from theHasher trait of the standard library (std::hash::Hasher,core::hash::Hasher) produce non-portable results.
This is not specific to SipHash, and affects all hash functions.
The only safe methods in that trait arewrite() andfinish().
It is thus recommended to use SipHash (and all other hash functions, actually) as documented above.
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SipHash (2-4, 1-3 + 128 bit variant) implementations for Rust