相当于golang中的盐和哈希

Question

Here's an example of salting and hashing a given password in python.

import scrypt
import os

# Length of salt
PW_SALT_BYTES = 32
# Length of scrypt hash of passwords
PW_HASH_BYTES = 64
# test password
password = "hello"

salt = os.urandom(PW_SALT_BYTES).encode('hex')
# hash(password, salt, N=1 << 14, r=8, p=1, buflen=64)
hashed_password = scrypt.hash(str(password), salt.decode('hex'), buflen=PW_HASH_BYTES).encode('hex')
print(hashed_password)

Which would give us a hashed and salted string in return:-

4d1da45b401961fccb10e094ecd70ec79510f05483ca293d300bbd0024e35866ca39fe09fbc15f83a359431021a1ed9644f7d2b871b357e37a186300877edb18

How would I implement this in golang?

Answer 1

Go doesn't have scrypt in the standard library but there is an "official" implementation in the go.crypto repo.

import (
    "crypto/rand"
    "fmt"
    "io"
    "log"

    "code.google.com/p/go.crypto/scrypt"
)

const (
    PW_SALT_BYTES = 32
    PW_HASH_BYTES = 64

    password = "hello"
)

func main() {
    salt := make([]byte, PW_SALT_BYTES)
    _, err := io.ReadFull(rand.Reader, salt)
    if err != nil {
        log.Fatal(err)
    }

    hash, err := scrypt.Key([]byte(password), salt, 1<<14, 8, 1, PW_HASH_BYTES)
    if err != nil {
        log.Fatal(err)
    }

    fmt.Printf("%x
", hash)
}