XKCP/XKCP

the official Rust and C implementations of the BLAKE3 cryptographic hash function

CIRCL: Cloudflare Interoperable Reusable Cryptographic Library

C library for prototyping and experimenting with quantum-resistant cryptography

Collection of cryptographic hash functions written in pure Rust

Audited & minimal JS implementation of hash functions, MACs and KDFs.

Code

LibTomCrypt is a fairly comprehensive, modular and portable cryptographic toolkit that provides developers with a vast array of well known published block ciphers, one-way hash functions, chaining modes, pseudo-random number generators, public key cryptography and a plethora of other routines.

Optimized C library for EC operations on curve secp256k1

free C++ class library of cryptographic schemes