SipHash64

SipHash function with 64-bit output.

Recommended parameters are:

(c_rounds=4, d_rounds=8) for conservative security; regular hash functions such as BLAKE2 or BLAKE3 are usually a better alternative.
(c_rounds=2, d_rounds=4) standard parameters.
(c_rounds=1, d_rounds=3) reduced-round function. Faster, no known implications on its practical security level.
(c_rounds=1, d_rounds=2) fastest option, but the output may be distinguishable from random data with related keys or non-uniform input - not suitable as a PRF.

SipHash is not a traditional hash function. If the input includes untrusted content, a secret key is absolutely necessary. And due to its small output size, collisions in SipHash64 can be found with an exhaustive search.

Fields of this type

Fields

state:State
buf:[8]u8
buf_len:usize

Initialize a state for a SipHash function

Functions

init: Initialize a state for a SipHash function
update: Add data to the state
peek
final: Return an authentication tag for the current state
finalResult
create: Return an authentication tag for a message and a key
finalInt: Return an authentication tag for the current state, as an integer
toInt: Return an authentication tag for a message and a key, as an integer
writer

Error sets in this namespace

Error Sets

Error

= 16

Values

key_length: = 16
mac_length: = @sizeOf(T)
block_length: = 8

Source

Implementation

pub fn SipHash64(comptime c_rounds: usize, comptime d_rounds: usize) type {
    return SipHash(u64, c_rounds, d_rounds);
}