package main

import (
	"fmt"

	"github.com/pilinux/argon2"
)

func main() {
	// Argon2i
	// create hash using argon2i and without any secret
	// $argon2i$v=19$m=65536,t=1,p=2$frbISZVHQ/ZgUpNA0SgdNQ$GuGB9vz9rTcJmDIebUFmVk0kyAX9xninyCp696PRdCA
	hash, err := argon2.CreateHash("pa$$word", "", argon2.DefaultParams)
	if err != nil {
		fmt.Println(err)
		return
	}
	fmt.Println(hash)

	// ComparePasswordAndHash performs a constant-time comparison between a
	// plain-text password and argon2id hash, using the parameters and salt
	// contained in the hash. It returns true if they match, otherwise it returns
	// false.
	match, err := argon2.ComparePasswordAndHash("pa$$word", "", hash)
	if err != nil {
		fmt.Println(err)
		return
	}
	fmt.Printf("Match: %v\n", match)

	// create hash using argon2i and with secret
	// $argon2i$v=19$m=65536,t=1,p=2$TfGuJ6SGvluWcQjsDdQWPQ$Seozoi/ZKJngavqpyZ5rs5lX5EKzJ2HSnMWJwVwJmVU
	hash, err = argon2.CreateHash("pa$$word", "12€45", argon2.DefaultParams)
	if err != nil {
		fmt.Println(err)
		return
	}
	fmt.Println(hash)

	match, err = argon2.ComparePasswordAndHash("pa$$word", "12€45", hash)
	if err != nil {
		fmt.Println(err)
		return
	}
	fmt.Printf("Match: %v\n", match)
	// --------------------------------------------------------------

	// Argon2id
	// create hash using argon2id and without any secret
	// $argon2id$v=19$m=65536,t=1,p=2$+Ni27r9ZIaEBs8mZn60Dlg$cxuw8quTcT5fIDqNIU27SinXyKiKQWFo/mfF4sogeKo
	idHash, err := argon2.IDCreateHash("pa$$word", "", argon2.DefaultParams)
	if err != nil {
		fmt.Println(err)
		return
	}
	fmt.Println(idHash)

	match, err = argon2.ComparePasswordAndHash("pa$$word", "", idHash)
	if err != nil {
		fmt.Println(err)
		return
	}
	fmt.Printf("Match: %v\n", match)

	// create hash using argon2id and with secret
	// $argon2id$v=19$m=65536,t=1,p=2$+haa0lKvImdlxrXCs0aJ/A$1h2lpPic8KQ7XckSdg+cE7LJX5kQ83BAZGNCBL6zmZI
	idHash, err = argon2.IDCreateHash("pa$$word", "12€45", argon2.DefaultParams)
	if err != nil {
		fmt.Println(err)
		return
	}
	fmt.Println(idHash)

	match, err = argon2.ComparePasswordAndHash("pa$$word", "12€45", idHash)
	if err != nil {
		fmt.Println(err)
		return
	}
	fmt.Printf("Match: %v\n", match)
}

params := &argon2.Params{
		Memory:      128 * 1024,
		Iterations:  4,
		Parallelism: 4,
		SaltLength:  16,
		KeyLength:   32,
	}

hash, err := argon2.CreateHash("pa$$word", "", params)