SipHash Assembly Implementation

This repository contains an implementation of the SipHash algorithm for both NASM and MASM (x86-64). It includes two versions of the algorithm:

• SipHash-2-4: The original variant, optimized for speed.
• SipHash-4-8: A more secure variant with additional rounds.

The code includes a simple C test file to check the correctness.

Files

• siphash_nasm.asm: Contains the implementation of the SipHash algorithm for the NASM assembler.
• siphash_masm.asm: Contains the implementation of the SipHash algorithm for the MASM assembler.
• siphash.h: Header file for integrating the assembly functions into C programs.
• test.c: A C file to test the SipHash functions.

Example Usage (from C)

#include "siphash.h"

int main() {
    const char *message = "Test message";
    uint64_t key0 = 0x0706050403020100;
    uint64_t key1 = 0x1F1E1D1C1B1A1918;

    uint64_t hash = siphash_2_4((uint8_t *)message, strlen(message), key0, key1);
    printf("Hash: %llx\n", hash);
    
    return 0;
}

About This Implementation

This project includes an independent implementation of the SipHash algorithm, originally designed by Jean-Philippe Aumasson and Daniel J. Bernstein. SipHash is a cryptographic pseudorandom function optimized for speed on short messages and is free from patent claims, as explicitly stated by its authors. This implementation is not affiliated with or endorsed by the original authors of SipHash. It is provided under MIT license.

Attribution

This project uses test vectors derived from SipHash, which is released under the CC0-1.0, MIT, and Apache 2.0 with LLVM exceptions licenses.
The test vector values were used solely for verifying the correctness of this implementation.

References

• https://www.aumasson.jp/siphash/siphash_slides.pdf
• Test from https://github.com/veorq/SipHash/blob/master/vectors.h