A header-only C++11 implementation of SipHash-2-4, a fast short-input PRF with a 128-bit key and 64-bit output.
Extract from the description:
SipHash is a family of pseudorandom functions (a.k.a. keyed hash
functions) optimized for speed on short messages.
Target applications include network traffic authentication and defense
against hash-flooding DoS attacks.
SipHash is secure, fast, and simple (for real):
* SipHash is simpler and faster than previous cryptographic algorithms
(e.g. MACs based on universal hashing)
* SipHash is competitive in performance with insecure
non-cryptographic algorithms (e.g. MurmurHash)
* We propose that hash tables switch to SipHash as a hash
function. Users of SipHash already include OpenDNS, Perl 5, Ruby, or
Rust.
Introductory blog post: https://idea.popcount.org/2013-01-24-siphash/
Copy siphash.hpp to your code directory, or add to include path.
Shortest program:
#include <iostream>
#include "siphash.hpp"
int main() {
siphash::Key key = {0,1,2,3,4,5,6,7,8,9,0xa,0xb,0xc,0xd,0xe,0xf};
char pt[] = "hello world!";
std::uint64_t hash = siphash::siphash24(pt, key);
std::cout << "plaintext=" << pt << " hash=" << hash << std::endl;
return 0;
}Type make:
$ make
64 tests passed in 0.008ms, 125ns per test
This code is released under the MIT License, the full text of which can be found is in the header of siphash.hpp.