PHC Crypto - Scrypt

According to Wikipedia:

scrypt (pronounced "ess crypt") is a password-based key derivation function created by Colin Percival, originally for the Tarsnap online backup service. The algorithm was specifically designed to make it costly to perform large-scale custom hardware attacks by requiring large amounts of memory. In 2016, the scrypt algorithm was published by IETF as RFC 7914. A simplified version of scrypt is used as a proof-of-work scheme by a number of cryptocurrencies, first implemented by an anonymous programmer called ArtForz in Tenebrix and followed by Fairbrix and Litecoin soon after.

Configuration options

Key	Type	Default	Notes
Cost	int	32768	Iterations count (affects memory and CPU usage)
Rounds	int	8	Block size (affects memory and CPU usage)
Parallelism	int	1	Parallelism factor (threads to run in parallel - affects the memory, CPU usage).
KeyLen	int	32	How many bytes to generate as output.
SaltLen	int	16	Salt length in bytes

Usage with PHC Crypto

package main

import (
	"fmt"
	"github.com/aldy505/phc-crypto"
)

func main() {
	crypto, err := phccrypto.Use(phccrypto.Scrypt, phccrypto.Config{
		Parallelism: 3,
	})
	if err != nil {
		fmt.Println(err)
	}

	hash, err := phccrypto.Hash("password")
	if err != nil {
		fmt.Println(err)
	}
	fmt.Println(hash) // $scrypt$v=0$p=3,ln=32768,r=8$64ecb15ec1aa81bc403a892efb2289ce$4fc8d3bc...

	verify, err := phccrypto.Verify(hash, "password")
	if err != nil {
		fmt.Println(err)
	}
	fmt.Println(verify) // true
}

Standalone usage

package main

import (
	"fmt"
	"github.com/aldy505/phc-crypto/scrypt"
)

func main() {
	hash, err := scrypt.Hash("password", scrypt.Config{
		Parallelism: 3,
	})
	if err != nil {
		fmt.Println(err)
	}
	fmt.Println(hash) // $scrypt$v=0$p=3,ln=32768,r=8$64ecb15ec1aa81bc403a892efb2289ce$4fc8d3bc...

	verify, err := scrypt.Verify(hash, "password")
	if err != nil {
		fmt.Println(err)
	}
	fmt.Println(verify) // true
}