blake2b: blake2b password hashing algorithm support

This module implements the blake2b password hashing algorithm, bug-for-bug compatible with the classic OpenBSD implementation. It is not recommended except in cases of backwards-compatibility with legacy systems.

This is a low-level module which implements cryptographic primitives. Direct use of cryptographic primitives is not recommended for non-experts, as incorrect use of these primitives can easily lead to the introduction of security vulnerabilities. Non-experts are advised to use the high-level operations available in the top-level crypto:: module.

Be advised that Hare's cryptography implementations have not been audited.

// Undocumented types:
type digest = struct {
	hash::hash,
	h: [8]u64,
	tlow: u64,
	thigh: u64,
	block: [BSZ]u8,
	blocklen: size,
};

fn blake2b(key: []u8, sz: size) digest;

type digest = struct {
	hash::hash,
	h: [8]u64,
	tlow: u64,
	thigh: u64,
	block: [BSZ]u8,
	blocklen: size,
};

fn blake2b(key: []u8, sz: size) digest;