BLAKE2.zig

This is a BLAKE2 implementation written in Zig.

There is already an implementation in the standard library, but this library lets you pass an optional key and an arbitrary digest length (although still within limitations).

Usage

test.zig

const blake2 = @import("blake2");

test "Simple API" {
    // Produce BLAKE2b-512 digest
    var buffer0: [64]u8 = undefined;
    try blake2.Blake2b("abc", &buffer0, null);

    // Produce BLAKE2s-256 digest
    var buffer1: [32]u8 = undefined;
    try blake2.Blake2s("abc", &buffer1, null);
}

test "Streaming API" {
    var buffer0: [64]u8 = undefined;
    var buffer1: [32]u8 = undefined;

    var blake2b_context = try blake2.Blake2bContext.init(buffer0.len, null);
    blake2b_context.update("abc");
    try blake2b_context.final(&buffer0);

    var blake2s_context = try blake2.Blake2sContext.init(buffer1.len, null);
    blake2s_context.update("abc");
    try blake2s_context.final(&buffer1);
}

build.zig

const builtin = @import("builtin");
const std = @import("std");

pub fn build(b: *std.build.Builder) void {
    const run_test_step = b.step("test", "Run all tests in debug mode");
    {
        const tests = b.addTest("test.zig");
        tests.setBuildMode(builtin.Mode.Debug);

        // Assuming this library's folder is placed on the root directory...
        tests.addPackagePath("blake2", "blake2/blake2.zig");

        run_test_step.dependOn(&tests.step);
    }

    b.default_step.dependOn(run_test_step);
}

To-do

• SIMD
• b2sum example