go-argon2

Go bindings for the reference C implementation of Argon2, the winner of the Password Hash Competition.

Installation

$ go get -d github.com/tvdburgt/go-argon2

This package depends on libargon2, specifically libargon2.so and argon2.h. Make sure the library files are available in /usr:

$ git clone https://github.com/P-H-C/phc-winner-argon2.git argon2
$ cd argon2
$ git checkout tags/20171227 # switch to latest release
$ sudo make install

Test everything is installed correctly:

$ cd $GOPATH/src/github.com/tvdburgt/go-argon2/
$ go test

Usage

Raw hash with default configuration

hash, err := argon2.Hash(argon2.NewContext(), []byte("password"), []byte("somesalt"))
if err != nil {
	log.Fatal(err)
}

fmt.Printf("%x\n", hash)

Encoded hash with custom configuration

ctx := &argon2.Context{
	Iterations:  5,
	Memory:      1 << 16,
	Parallelism: 2,
	HashLen:     32,
	Mode:        argon2.ModeArgon2i,
	Version:     argon2.Version13,
}

s, err := argon2.HashEncoded(ctx, []byte("password"), []byte("somesalt"))
if err != nil {
	log.Fatal(err)
}

fmt.Println(s)