使用salt和迭代计数-节点等效的用户密码的Java/Node PBKDF2散列

Question

我试图在Nodejs中复制此方法。我想知道它在Node中的等价性，类似于在Node.js (PBKDF2WithHmacSHA1)中复制Java密码散列代码。

Java代码：

  private final byte[] _createSaltedPassword(String password, byte[] salt, int iterationCount) {
    
    byte[] dk;    
    PBEKeySpec keySpec = new PBEKeySpec(password.toCharArray(), salt, iterationCount, 256);
    SecretKeyFactory key = SecretKeyFactory.getInstance("PBKDF2WithHmacSHA256");
    dk = key.generateSecret(keySpec).getEncoded();
    return dk; 
  }

为了本例，我将用户(用户)、客户端nonce (aabbccddaabbccdd)、密码(Password123)、salt和迭代计数(4096)保持不变。我最后一次尝试用密码在Node中得到等价物。

  const crypto = require("crypto");

  const saltedPassword = crypto.pbkdf2Sync(password, salt, iterationCount, 32, 'sha256').toString('base64');
  console.log('Salted Password:', saltedPassword);

它用于摘要身份验证。Java程序的输出日志：

Java程序输出日志

Java密码：nA0hWFpZshs+iME/leUy+e2gM5mjIgo6PYJ8eNjRdhY=

节点盐渍密码：PYgn6rcngiE0HSMwzmWhd2W5qTdaRilw4PEeuy3OyRo=

谢谢。

Answer 1

很抱歉，我懒得检查链接的代码，但是我用Crypto为Java和NodeJS提供了两个示例，它们使用PBKDF2算法从密码库中生成一个秘密密钥。您可以在在线编译器- Java代码和NodeJs码中运行这两种代码。

这是带有一个固定的=不安全的的输出

Generate a 32 byte long AES key with PBKDF2
aesKeySha256 length:  32  data:  e1ea3e4b0376c0f9bf93b94fe71719a099317297b79108aacd88c8a355d7a3d4

安全警告:以下代码没有任何异常处理，仅用于教育目的。不要在生产中使用固定盐，它只用于显示两个平台生成相同的密钥。。

Java代码：

import javax.crypto.SecretKeyFactory;
import javax.crypto.spec.PBEKeySpec;
import java.security.SecureRandom;
import java.security.spec.KeySpec;

public class Main {
    public static void main(String[] args) throws Exception {
        System.out.println("Generate a 32 byte long AES key with PBKDF2");

        // get the password as char array
        char[] passwordChar = "secret password".toCharArray();
        final int PBKDF2_ITERATIONS = 15000; // number of iterations, higher is better but slower
        // ### security warning - never use a fixed salt in production, this is for compare reasons only
        byte[] salt = generateFixedSalt32Byte();
        // please use below generateSalt32Byte()
        //byte[] salt = generateSalt32Byte();
        byte[] aesKeySha256 = generateAes256KeyPbkdf2Sha256(passwordChar, PBKDF2_ITERATIONS, salt);
        System.out.println("aesKeySha256 length: " + aesKeySha256.length + " data: " + bytesToHex(aesKeySha256));
    }

    public static byte[] generateAes256KeyPbkdf2Sha256(char[] password, int iterations, byte[] salt) throws Exception {
        SecretKeyFactory secretKeyFactory = SecretKeyFactory.getInstance("PBKDF2WithHmacSHA256");
        KeySpec keySpec = new PBEKeySpec(password, salt, iterations, 32 * 8);
        return secretKeyFactory.generateSecret(keySpec).getEncoded();
    }

    private static byte[] generateSalt32Byte() {
        SecureRandom secureRandom = new SecureRandom();
        byte[] salt = new byte[32];
        secureRandom.nextBytes(salt);
        return salt;
    }

    private static byte[] generateFixedSalt32Byte() {
        // ### security warning - never use this in production ###
        byte[] salt = new byte[32]; // 32 x0's
        return salt;
    }

    private static String bytesToHex(byte[] bytes) {
        StringBuffer result = new StringBuffer();
        for (byte b : bytes) result.append(Integer.toString((b & 0xff) + 0x100, 16).substring(1));
        return result.toString();
    }
}

NodeJs码

console.log("Generate a 32 byte long AES key with PBKDF2");
var crypto = require('crypto');

var password = "secret password";
var PBKDF2_ITERATIONS = 15000; // number of iterations, higher is better but slower

// ### security warning - never use a fixed salt in production, this is for compare reasons only
var salt = generateFixedSalt32Byte();
// please use below generateSalt32Byte()
//var salt = generateSalt32Byte();

var aesKeySha256 = generateAes256KeyPbkdf2Sha256(password, PBKDF2_ITERATIONS, salt);
console.log('aesKeySha256 length: ',
  aesKeySha256.length, ' data: ', bytesToHex(aesKeySha256));

function generateAes256KeyPbkdf2Sha256(password, iterations, salt) {
  return crypto.pbkdf2Sync(password, salt, iterations, 32, 'sha256');
}

function generateSalt32Byte() {
  return crypto.randomBytes(32);
}

function generateFixedSalt32Byte() {
  return Buffer.from('0000000000000000000000000000000000000000000000000000000000000000', 'hex');
}

function bytesToHex(input) {
  return input.toString('hex');
}