java 实现 pbkdf2_sha256 加密验证算法

 在线加密验证地址：PBKDF2 Derive Key Onlinehttps://8gwifi.org/pbkdf.jsp

import java.nio.charset.Charset;
import java.security.NoSuchAlgorithmException;
import java.security.spec.InvalidKeySpecException;
import java.security.spec.KeySpec;
import java.util.Base64;
import java.util.Date;
import java.util.Random;
import java.util.UUID;
import javax.crypto.SecretKey;
import javax.crypto.SecretKeyFactory;
import javax.crypto.spec.PBEKeySpec;
/**
* pbkdf2_sha256加密验证算法
* @author Administrator
*
*/
public class Pbkdf2Sha256 {
//默认迭代计数为 27500
private static final Integer DEFAULT_ITERATIONS = 27500;
//算法名称
private static final String algorithm = "pbkdf2_sha256";
// 密文长度
private static final Integer KEY_LENGTH = 512;
/**
* 获取密文
*
* @param password
密码明文
* @param salt
加盐
* @param iterations 迭代计数
* @return
*/
private static String getEncodedHash(String password, String salt, int iterations,int keyLength) {
// 仅返回整个编码密码的最后一部分
SecretKeyFactory keyFactory = null;
try {
// Instance：PBKDF2WithHmacSHA1、PBKDF2WithHmacSHA256、PBKDF2WithHmacSHA224、PBKDF2WithHmacSHA512、PBKDF2WithHmacSHA384
keyFactory = SecretKeyFactory.getInstance("PBKDF2WithHmacSHA256");
} catch (NoSuchAlgorithmException e) {
System.out.println("无法检索 pbkdf2_sha256 算法："+e);
}
KeySpec keySpec = new PBEKeySpec(password.toCharArray(), Base64.getDecoder().decode(salt), iterations, keyLength);
//
KeySpec keySpec = new PBEKeySpec(password.toCharArray(), salt.getBytes(Charset.forName("UTF-8")), iterations, keyLength);
SecretKey secret = null;
try {
secret = keyFactory.generateSecret(keySpec);
} catch (InvalidKeySpecException e) {
System.out.println("无法生成密钥："+e);
}
byte[] rawHash = secret.getEncoded();
byte[] hashBase64 = Base64.getEncoder().encode(rawHash);
return new String(hashBase64);
}
/**
* 明文加盐
*
* @return String
*/
private static String getSalt() {
int length = 22;
Random rand = new Random();
char[] rs = new char[length];
for (int i = 0; i < length; i++) {
int t = rand.nextInt(3);
if (t == 0) {
rs[i] = (char) (rand.nextInt(10) + 48);
} else if (t == 1) {
rs[i] = (char) (rand.nextInt(26) + 65);
} else {
rs[i] = (char) (rand.nextInt(26) + 97);
}
}
return new String(rs)+"==";
}
/**
* 随机加盐
* 默认迭代次数 27500
* 默认加密长度 512
* @param password 密码明文
* @return
*/
public static String encode(String password) {
return encode(password, getSalt());
}
/**
* 随机加盐
*
* @param password 密码明文
* @return
*/
public static String encode(String password, int iterations, int keyLength) {
return encode(password, getSalt(), iterations, keyLength);
}
/**
* 随机加盐
* 默认迭代次数 27500
* @param password 密码明文
* @return
*/
public static String encode(String password, int iterations) {
return encode(password, getSalt(), iterations, KEY_LENGTH);
}
/**
* 默认迭代次数 27500
* 默认加密长度 512
* @param password 密码明文
* @param salt 加盐
* @return
*/
public static String encode(String password, String salt) {
return encode(password, salt, DEFAULT_ITERATIONS, KEY_LENGTH);
}
/**
* @param password
密码明文
* @param salt
加盐
* @param iterations 迭代计数
* @return
*/
public static String encode(String password, String salt, int iterations,int keyLength) {
// 返回散列密码，以及算法、迭代次数和salt
String hash = getEncodedHash(password, salt, iterations,keyLength);
return String.format("%s$%d$%d$%s$%s", algorithm, iterations, keyLength, salt, hash);
}
/**
* 校验密码是否合法
*
* @param password
密码明文
* @param hashedPassword 密码密文
* @return
*/
public static boolean verification(String password, String hashedPassword) {
// hashedPassword包括：ALGORITHM、ITERATIONS_NUMBER、SALT和HASH；部分用美元字符(“$”)连接
String[] parts = hashedPassword.split("\$");
if (parts.length != 5) {
// 哈希格式错误
return false;
}
Integer iterations = Integer.parseInt(parts[1]);
Integer keyLength = Integer.parseInt(parts[2]);
String salt = parts[3];
String hash = encode(password, salt, iterations,keyLength);
return hash.equals(hashedPassword);
}
public static void main(String[] args) {
System.out.println(UUID.randomUUID());
System.out.println(new Date().getTime());
System.out.println(Pbkdf2Sha256.encode("123456", "Do7yDa9wXAvlvqwTJuIh0Q==", 27500,512));
String en = "pbkdf2_sha256$27500$512$Do7yDa9wXAvlvqwTJuIh0Q==$lqoUCJciczBJ3OqW1myBEru3dZEnVfsz7qS3wc/e6lBLA93p6SQEwuWTFrVUBshkQBQkHy/TbdjlqWVa5ZcVJw==";
System.out.println(Pbkdf2Sha256.verification("123456", en));
//
System.out.println(Pbkdf2Sha256.getSalt());
}
}

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