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js加密，java解密

  • 作者： 佚名     来源： 网络转载
  • 时间：2019-12-02

在做项目的时候，通常需要js加密，java解密，在网上找了一下，一个基于rsa的加密，解密方案。

js加密：

<!DOCTYPE html>
<html>
<head>
<meta charset="UTF-8">
<title>Insert title here</title>
<script type="text/javascript" src="jsencrypt.min.js"></script>
<script type="text/javascript">

var encrypt = new JSEncrypt();
encrypt.setPublicKey("MFwwDQYJKoZIhvcNAQEBBQADSwAwSAJBAJK+CtxbfTYxQofcZ48yFb+MabIniIwG
" + 
		"5lhykq7y20Xe/7lcWQW1qL870LCsuWjlKy/GL+A5G2xta57a4Qy8Z78CAwEAAQ==");
console.log("这是123456的密文："+encrypt.encrypt("123456"));

</script>
</head>
<body>
2132

<a href="/authLogin">登录</a>
</body>
</html>

下载地址：https://codeload.github.com/travist/jsencrypt/zip/master

java解密：

package com.oauth.client;

import java.security.Key;
import java.security.KeyFactory;
import java.security.KeyPair;
import java.security.KeyPairGenerator;
import java.security.NoSuchAlgorithmException;
import java.security.PrivateKey;
import java.security.PublicKey;
import java.security.Signature;
import java.security.spec.PKCS8EncodedKeySpec;
import java.security.spec.X509EncodedKeySpec;
import java.util.HashMap;
import java.util.Map;

import javax.crypto.Cipher;

import org.apache.commons.codec.binary.Base64;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
 
/**
 * @author lpf
 * 在线密钥http://travistidwell.com/jsencrypt/demo/index.html
 * pkcs8转码：http://tool.chacuo.net/cryptrsapkcs1pkcs8
 */
public class RSACoder {
private static Logger logger = LoggerFactory.getLogger(RSACoder.class);
	
	public static final String KEY_ALGORITHM = "RSA";
	public static final String SIGNATURE_ALGORITHM = "MD5withRSA";
 
	private static final String PUBLIC_KEY = "RSAPublicKey";
	private static final String PRIVATE_KEY = "RSAPrivateKey";
  
	public static void main(String[] args) throws Exception {
		
		  String encryptAndBase64ByPublicKey =  RSACoder.encryptAndBase64ByPublicKey("这里445545输入密文", publicKey);
		  System.out.println( encryptAndBase64ByPublicKey );
		 
 		byte[] de = RSACoder.decryptBase64AndRSAByPrivateKey(encryptAndBase64ByPublicKey);
 		System.out.println(new String(de)  );
		
		   de = RSACoder.decryptBase64AndRSAByPrivateKey(
		  "UfuAgO1OeEJ3rzxrkjZcnwxNtDwDp1yuaEgrDzT6p6cw9FRusZwb8MwCTf+rFVAvitXBUPrV/7Kr/cIoB3u7Fw=="
		  ); System.out.println( new String(de)  );
		 
	}
	/**公钥，请换掉这里的key，乱写的**/
	public static String publicKey = "MFwwDQYJKoZIhvcNAQEBBQADSwAwSAJBAJK+CtxbfTYxQofcZ48yFb+MabIniIwG
" + 
			"5lhykq7y20Xe/7lcWQW1qL870LCsuWjlKy/GL+A5G2xta57a4Qy8Z78CAwEAAQ==";
	/**私钥，请换掉这里的key，乱写的**/
	
	  public static String privateKey =
	  "MIIBVAIBADANBgkqhkiG9w0BAQEFAASCAT4wggE6AgEAAkEAkr4K3Ft9NjFCh9xn
" +
	  "jzIVv4xpsieIjAbmWHKSrvLbRd7/uVxZBbWovzvQsKy5aOUrL8Yv4DkbbG1rntrh
" +
	  "DLxnvwIDAQABAkBxuQJlwCmLpCVxcSh421HrfwAy51x1WKuPhEuVdfTlcj1yeqdD
" +
	  "I39QEH4ruXuZGNODsJrykRDruu8kW7gR6PmxAiEA1OhTrw3XaRmdDynIJ99UpiMz
" +
	  "m7DsbJjmBNqkcR3or/MCIQCwcWhXZefQHbPk4QGVkRUmE3UE2eKvyj7LsCr2lUEo
" +
	  "BQIgfn1o+l+m0vI8tX2FROsSR4IybxU14W8VeVzMxceXLrECIBG3ETbVMHUgxlMQ
" +
	  "lEwkCO+NvI4EIlJsB+oDggzH54bRAiEAoWP+zcIYPt1F3DSjGJJ0zwdFmuo2gNKE
" +
	  "gn2aM6Yg0Po=";
	 
 
	
	
	
	static {
		init();
	}
	
	public static void init() {
		/**
		 * 生成key
		 */
//		Map<String, Key> keyMap;
//		try {
//			keyMap = RSACoder.initKey();
//			publicKey = RSACoder.getPublicKey(keyMap);
//			privateKey = RSACoder.getPrivateKey(keyMap);
//		} catch (Exception e) {
//			// TODO Auto-generated catch block
//			logger.error("初始化前端js加密秘钥失败：",e);
//		}
		logger.info("公钥: 

" + publicKey);
		logger.info("私钥： 

" + privateKey);
	}
  
	public static byte[] decryptBASE64(String key) {
		return Base64.decodeBase64(key);
	}
 
	public static String encryptBASE64(byte[] bytes) {
		return Base64.encodeBase64String(bytes);
	}
	
	public static byte[] decryptBase64AndRSAByPrivateKey(String data)throws Exception{
		return decryptByPrivateKey(RSACoder.decryptBASE64(data),privateKey);
	}
	
	/**
	 * 私钥解密
	 * @param data  要解密的base64编码的数据；
	 * @param key   私钥的base64编码数据；
	 * @return
	 * @throws Exception
	 */
	public static byte[] decryptAndBase64ByPrivateKey(String data, String key) throws Exception{
		return decryptByPrivateKey(RSACoder.decryptBASE64(data),key);
	}
  
	/**
	 * 公钥加密
	 * 返回base64字符串
	 * @param data
	 * @param key
	 * @return
	 * @throws Exception
	 */
	public static String encryptAndBase64ByPublicKey(String data,String key) throws Exception {
		return encryptBASE64(encryptByPublicKey(data,key));
	}
 
  /**
   * 
   * 用私钥对信息生成数字签名
   *
   * @param data    加密数据
   * @param privateKey 私钥
   * @return
   * @throws Exception
   */
  public static String sign(byte[] data, String privateKey) throws Exception {
	  // 解密由base64编码的私钥
	  byte[] keyBytes = decryptBASE64(privateKey);
	  // 构造PKCS8EncodedKeySpec对象
	  PKCS8EncodedKeySpec pkcs8KeySpec = new PKCS8EncodedKeySpec(keyBytes);
	  // KEY_ALGORITHM 指定的加密算法
	  KeyFactory keyFactory = KeyFactory.getInstance(KEY_ALGORITHM);
	  // 取私钥匙对象
	  PrivateKey priKey = keyFactory.generatePrivate(pkcs8KeySpec);
	  // 用私钥对信息生成数字签名
	  Signature signature = Signature.getInstance(SIGNATURE_ALGORITHM);
	  signature.initSign(priKey);
	  signature.update(data);
	  return encryptBASE64(signature.sign());
  }
 
  /**
   * 校验数字签名
   * 
   * @param data   加密数据
   * @param publicKey 公钥
   * @param sign   数字签名
   * @return 校验成功返回true 失败返回false
   * @throws Exception
   */
  public static boolean verify(byte[] data, String publicKey, String sign)
      throws Exception {
    // 解密由base64编码的公钥
    byte[] keyBytes = decryptBASE64(publicKey);
    // 构造X509EncodedKeySpec对象
    X509EncodedKeySpec keySpec = new X509EncodedKeySpec(keyBytes);
    // KEY_ALGORITHM 指定的加密算法
    KeyFactory keyFactory = KeyFactory.getInstance(KEY_ALGORITHM);
    // 取公钥匙对象
    PublicKey pubKey = keyFactory.generatePublic(keySpec);
    Signature signature = Signature.getInstance(SIGNATURE_ALGORITHM);
    signature.initVerify(pubKey);
    signature.update(data);
    // 验证签名是否正常
    return signature.verify(decryptBASE64(sign));
  }
  
  /**
   * 使用私钥解密
   * @param data
   * @param privateKey
   * @return
   * @throws Exception
   */
  public static byte[] decryptByPrivateKey(byte[] data,  Key privateKey) throws Exception{
	  // 对数据解密
	  Cipher cipher = Cipher.getInstance(KEY_ALGORITHM);
	  cipher.init(Cipher.DECRYPT_MODE, privateKey);
	  return cipher.doFinal(data);
  }
  
  public static byte[] decryptByPrivateKey(byte[] data, String key) throws Exception{
	  // 	对密钥解密
	  byte[] keyBytes = decryptBASE64(key);
	  // 取得私钥
	  PKCS8EncodedKeySpec pkcs8KeySpec = new PKCS8EncodedKeySpec(keyBytes);
	  KeyFactory keyFactory = KeyFactory.getInstance(KEY_ALGORITHM);
	  Key privateKey = keyFactory.generatePrivate(pkcs8KeySpec);
	  return decryptByPrivateKey(data,privateKey);
  }
 
  /**
   * 解密<br>
   * 用私钥解密
   *
   * @param data
   * @param key
   * @return
   * @throws Exception
   */
  public static byte[] decryptByPrivateKey(String data, String key)
      throws Exception {
    return decryptByPrivateKey(decryptBASE64(data),key);
  }
 
  /**
   * 解密<br>
   * 用公钥解密
   *
   * @param data
   * @param key
   * @return
   * @throws Exception
   */
  public static byte[] decryptByPublicKey(byte[] data, String key)
      throws Exception {
    // 对密钥解密
    byte[] keyBytes = decryptBASE64(key);
    // 取得公钥
    X509EncodedKeySpec x509KeySpec = new X509EncodedKeySpec(keyBytes);
    KeyFactory keyFactory = KeyFactory.getInstance(KEY_ALGORITHM);
    Key publicKey = keyFactory.generatePublic(x509KeySpec);
    // 对数据解密
    Cipher cipher = Cipher.getInstance(keyFactory.getAlgorithm());
    cipher.init(Cipher.DECRYPT_MODE, publicKey);
    return cipher.doFinal(data);
  }
 
  /**
   * 加密<br>
   * 用公钥加密
   *
   * @param data
   * @param key
   * @return
   * @throws Exception
   */
  public static byte[] encryptByPublicKey(String data, String key)
      throws Exception {
    // 对公钥解密
    byte[] keyBytes = decryptBASE64(key);
    // 取得公钥
    X509EncodedKeySpec x509KeySpec = new X509EncodedKeySpec(keyBytes);
    KeyFactory keyFactory = KeyFactory.getInstance(KEY_ALGORITHM);
    Key publicKey = keyFactory.generatePublic(x509KeySpec);
    // 对数据加密
    Cipher cipher = Cipher.getInstance(keyFactory.getAlgorithm());
    cipher.init(Cipher.ENCRYPT_MODE, publicKey);
    return cipher.doFinal(data.getBytes());
  }
  
  /**
   * 加密<br>
   * 用私钥加密
   *
   * @param data
   * @param key
   * @return
   * @throws Exception
   */
  public static byte[] encryptByPrivateKey(byte[] data, String key)
      throws Exception {
    // 对密钥解密
    byte[] keyBytes = decryptBASE64(key);
    // 取得私钥
    PKCS8EncodedKeySpec pkcs8KeySpec = new PKCS8EncodedKeySpec(keyBytes);
    KeyFactory keyFactory = KeyFactory.getInstance(KEY_ALGORITHM);
    Key privateKey = keyFactory.generatePrivate(pkcs8KeySpec);
    // 对数据加密
    Cipher cipher = Cipher.getInstance(keyFactory.getAlgorithm());
    cipher.init(Cipher.ENCRYPT_MODE, privateKey);
    return cipher.doFinal(data);
  }
 
  /**
   * 取得私钥
   *
   * @param keyMap
   * @return
   * @throws Exception
   */
  public static String getPrivateKey(Map<String, Key> keyMap)
      throws Exception {
    Key key = (Key) keyMap.get(PRIVATE_KEY);
    return encryptBASE64(key.getEncoded());
  }
 
  /**
   * 取得公钥
   *
   * @param keyMap
   * @return
   * @throws Exception
   */
  public static String getPublicKey(Map<String, Key> keyMap)
      throws Exception {
    Key key = keyMap.get(PUBLIC_KEY);
    return encryptBASE64(key.getEncoded());
  }
 
  /**
   * 初始化密钥
   *
   * @return
 * @throws NoSuchAlgorithmException 
   * @throws Exception
   */
  public static Map<String, Key> initKey() throws NoSuchAlgorithmException {
    KeyPairGenerator keyPairGen = KeyPairGenerator
        .getInstance(KEY_ALGORITHM);
    keyPairGen.initialize(1024);
    KeyPair keyPair = keyPairGen.generateKeyPair();
    Map<String, Key> keyMap = new HashMap<String, Key>(2);
    keyMap.put(PUBLIC_KEY, keyPair.getPublic());// 公钥
    keyMap.put(PRIVATE_KEY, keyPair.getPrivate());// 私钥
    return keyMap;
  }
 
}

在写私钥的时候，报了一个错误

Caused by: java.security.InvalidKeyException: IOException : algid parse error, not a sequence
需要私钥进行pkcs8转码：http://tool.chacuo.net/cryptrsapkcs1pkcs8