以下是在python中对给定密码进行腌制和散列的示例。
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)
这会给我们一个哈希和盐渍的字符串作为回报: -
4d1da45b401961fccb10e094ecd70ec79510f05483ca293d300bbd0024e35866ca39fe09fbc15f83a359431021a1ed9644f7d2b871b357e37a186300877edb18
我如何在golang中实现这个?
答案 0 :(得分:17)
Go并没有在标准库中有scrypt但是有一个&#34;官方&#34;在go.crypto repo中实现。
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\n", hash)
}
答案 1 :(得分:8)
在Golang中使用随机盐安全散列密码的优秀库golang.org/x/crypto/bcrypt不是使用scrypt
,而是在下面的答案中提到:
Bcrypt password hashing in Golang (compatible with Node.js)?
使用bcrypt
代替scrypt
的一些好处:
以下是使用上述答案中的bcrypt的例子:
package main
import (
"golang.org/x/crypto/bcrypt"
"fmt"
)
func main() {
password := []byte("MyDarkSecret")
// Hashing the password with the default cost of 10
hashedPassword, err := bcrypt.GenerateFromPassword(password, bcrypt.DefaultCost)
if err != nil {
panic(err)
}
fmt.Println(string(hashedPassword))
// Comparing the password with the hash
err = bcrypt.CompareHashAndPassword(hashedPassword, password)
fmt.Println(err) // nil means it is a match
}
答案 2 :(得分:6)
现在看起来Go已经在官方图书馆中得到了解读。其中许多其他加密函数中的subrepository x/crypto都有scrypt。
以下是如何使用它的示例:
package main
import (
"golang.org/x/crypto/scrypt"
"fmt"
)
func main(){
salt := []byte("asdfasdf")
dk, err := scrypt.Key([]byte("some password"), salt, 16384, 8, 1, 32)
fmt.Println(dk)
fmt.Println(err)
}
答案 3 :(得分:1)
这是我根据RFC 2898 / PKCS #5 v2.0
编写的一个完整的哈希实用程序函数。
Hash
可用于散列密码,例如Hash("hello")
Verify
可以用于针对哈希的原始密码,基本上,它的作用是哈希原始字符串并将其与实际哈希进行比较。
package common
import (
"crypto/rand"
"crypto/sha1"
"encoding/base64"
"errors"
"fmt"
"golang.org/x/crypto/pbkdf2"
"io"
"strconv"
"strings"
)
const (
SALT_BYTE_SIZE = 24
HASH_BYTE_SIZE = 24
PBKDF2_ITERATIONS = 1000
)
func Hash(password string) (string, error) {
salt := make([]byte, SALT_BYTE_SIZE)
if _, err := io.ReadFull(rand.Reader, salt); err != nil {
fmt.Print("Err generating random salt")
return "", errors.New("Err generating random salt")
}
//todo: enhance: randomize itrs as well
hbts := pbkdf2.Key([]byte(password), salt, PBKDF2_ITERATIONS, HASH_BYTE_SIZE, sha1.New)
//hbtstr := fmt.Sprintf("%x", hbts)
return fmt.Sprintf("%v:%v:%v",
PBKDF2_ITERATIONS,
base64.StdEncoding.EncodeToString(salt),
base64.StdEncoding.EncodeToString(hbts)), nil
}
func Verify(raw, hash string) (bool, error) {
hparts := strings.Split(hash, ":")
itr, err := strconv.Atoi(hparts[0])
if err != nil {
fmt.Printf("wrong hash %v", hash)
return false, errors.New("wrong hash, iteration is invalid")
}
salt, err := base64.StdEncoding.DecodeString(hparts[1])
if err != nil {
fmt.Print("wrong hash, salt error:", err)
return false, errors.New("wrong hash, salt error:" + err.Error())
}
hsh, err := base64.StdEncoding.DecodeString(hparts[2])
if err != nil {
fmt.Print("wrong hash, hash error:", err)
return false, errors.New("wrong hash, hash error:" + err.Error())
}
rhash := pbkdf2.Key([]byte(raw), salt, itr, len(hsh), sha1.New)
return equal(rhash, hsh), nil
}
//bytes comparisons
func equal(h1, h2 []byte) bool {
diff := uint32(len(h1)) ^ uint32(len(h2))
for i := 0; i < len(h1) && i < len(h2); i++ {
diff |= uint32(h1[i] ^ h2[i])
}
return diff == 0
}
这里的单元测试将帮助您弄清楚如何调用此类函数
package common
import (
"github.com/stretchr/testify/assert"
"testing"
)
func TestHash(t *testing.T) {
hash, err := Hash("hello")
assert.Nil(t, err)
assert.NotEmpty(t, hash)
}
func TestVerify(t *testing.T) {
hash, err := Hash("hello")
assert.Nil(t, err)
assert.NotEmpty(t, hash)
ok, err := Verify("hello", hash)
assert.Nil(t, err)
assert.True(t, ok)
}