Question

尝试获取PBKDF2的java实现，我将其用作我的C＃版本：https://github.com/shawnmclean/SimpleCrypto.net

我的代码：

import java.security.Key;
import java.security.NoSuchAlgorithmException;
import java.security.spec.InvalidKeySpecException;
import java.security.spec.KeySpec;

import javax.crypto.SecretKey;
import javax.crypto.SecretKeyFactory;
import javax.crypto.spec.PBEKeySpec;
import javax.crypto.spec.SecretKeySpec;

public class PBKDF2 {

    public static void main(String[] args) {
        try {
            SecretKeyFactory f = SecretKeyFactory.getInstance("PBKDF2WithHmacSHA1");
            KeySpec ks = new PBEKeySpec("iamtwentycharacterss".toCharArray(),"50.eGIYr3ZpxpWw67utH17s/A==".getBytes(),50,64);
            SecretKey s = f.generateSecret(ks);
            Key k = new SecretKeySpec(s.getEncoded(),"HmacSHA1");
            System.out.println(new String(k.getEncoded()));
        } catch (NoSuchAlgorithmException e) {
            e.printStackTrace();
        } catch (InvalidKeySpecException e) {
            e.printStackTrace();
        }       
    }

}

我在stackoverflow上尝试了各种答案：

Java SimpleCrypto Class for encryption / decryption producing different results in Coldfusion 9 and Java (Android)

Java - PBKDF2 with HMACSHA256 as the PRF

Password Verification with PBKDF2 in Java

不幸的是结果不匹配，结果应该是： mOs/Mw7ZRM99i/BTJ+xnmj5Pm6QlqP1vuPqrf/Qa3WwassxI1QJ447OqdoBzunbJjvrx7+bHAO1Dnj8ltS4TKA==

Answer 1

如果可能有帮助，我已用以下代码解决了我的问题，Rfc2898DeriveBytes类：http://pastebin.com/iReZJ3Vq

import java.nio.charset.Charset;

import org.bouncycastle.util.encoders.Base64;

public class PBKDF2 {

    public static void main(String[] args) {
        try {
            String password = "iamtwentycharacterss";
            String salt = "50.eGIYr3ZpxpWw67utH17s/A==";
            int iterations = Integer.parseInt(salt.substring(0, salt.indexOf('.')));
            byte[] saltBytes = salt.getBytes(Charset.forName("UTF-8"));

            Rfc2898DeriveBytes rfc2898 = new Rfc2898DeriveBytes(password, saltBytes, iterations);
            byte[] key = rfc2898.getBytes(64);
            String hash = new String(Base64.encode(key));
            System.out.println(hash);
        } catch (Exception ex) {
            System.out.println("ERROR: " + ex);
        }
    }

}

Answer 2

我多么想念这一点......

程序中所需的密钥长度为64，但结果的密钥长度为512.将pbekeyspec中的所需密钥长度更改为512

KeySpec ks = new PBEKeySpec("iamtwentycharacterss".toCharArray(),"50.eGIYr3ZpxpWw67utH17s/A==".getBytes(),50,512);

PBKDF2，来自C＃的Java实现

2 个答案: