passwd's Introduction

passwd

Password hashing with argon2id, winner of the Password Hashing Competition in 2015. A replacement for bcrypt.

Usage

By default, it will use the basic configuration suggested for the argon2id hasher:

package main

import (
	"log"

	"github.com/alextanhongpin/passwd"
)

func main() {
	password := []byte("your raw text password")
	hash, err := passwd.Encrypt(password)
	if err != nil {
		log.Fatal(err)
	}
	log.Println(hash)

	match, err := passwd.Compare(hash, password)
	if err != nil {
		log.Fatal(err)
	}
	if !match {
		log.Fatal("password do not match")
	}
}

Output:

$argon2id$m=65536,t=2,p=4$HvNaNwCf4Bn55RLuR8uu1g==$e7ZgRsnRbZaFkXs2ogmbD5dt/mF5B0IAvOTYDr0ebZI=

Custom

There is a factory provided to customize the configuration for the hasher:

package main

import (
	"log"

	"github.com/alextanhongpin/passwd"
)

func main() {
	hasher := passwd.New(
		passwd.Time(2),
		passwd.Memory(64*1024),
		passwd.Parallelism(4),
		passwd.SaltLen(32),
		passwd.KeyLen(100),
	)

	password := []byte("secret")
	hash, err := hasher.Encrypt(password)
	if err != nil {
		log.Fatal(err)
	}
	log.Println(hash)

	match, err := hasher.Compare(hash, password)
	if err != nil {
		log.Fatal(err)
	}
	if !match {
		log.Fatal("password do not match")
	}
}

Output:

$argon2id$m=65536,t=2,p=4$ylby4LzuL0HRUW8MYKabENOgbX1NhOBSMDxSRkAMkQQ=$iDtW/fLs+vxsZQeDu3Aq/5JB9wTq4qG2OksocjLcdg0LaxTdOJtLHaDvN65XZB1ypP4v+K4rTOKQUHNaBWKNt/4fDNOVTXT5KExrZ+jRi+n1Wwd7L
BXVhqGofieSZRoPiBv1YA==

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