java加密与nodejs解密
发布于 10 年前 作者 hf201429 12744 次浏览 最后一次编辑是 8 年前 来自 问答

我们公司用nodejs做了个项目，现在要嵌入到java做的大系统中去。其中需要涉及到java的加密和nodejs的解密。 java加密过程中：

//加密的方式
		final String Algorithm = "DESede";
		byte[] encoded = null;
		Cipher cipher = null;
		SecretKey secretKey = null;
		try {
			secretKey = getSecretKey(enkey,Algorithm);
			cipher = Cipher.getInstance(Algorithm);
			cipher.init(Cipher.ENCRYPT_MODE, secretKey);
			encoded = cipher.doFinal(reqStr);
		} catch (Exception e) {
		}

上述中 DESede 在nodejs中对应应该用哪个进行解密啊？求各路大神指导下。

6 回复

http://nodejs.org/api/crypto.html

你可以看看这个，虽然我也不清楚 DESede 对应哪个

根据： Java文档：http://docs.oracle.com/javase/7/docs/api/javax/crypto/KeyGenerator.html OpenSSL文档：http://www.openssl.org/docs/apps/ciphers.html#CIPHER_LIST_FORMAT

DESede => 3DES

去 crypto 里面找到对应算法就好了

Every implementation of the Java platform is required to support the following standard KeyGenerator algorithms with the keysizes in parentheses:

  • AES (128)
  • DES (56)
  • DESede (168)
  • HmacSHA1
  • HmacSHA256

引用自Java文档：http://docs.oracle.com/javase/7/docs/api/javax/crypto/KeyGenerator.html

3DES cipher suites using triple DES. DES cipher suites using DES (not triple DES).

OpenSSL文档：http://www.openssl.org/docs/apps/ciphers.html#CIPHER_LIST_FORMAT

** 常识：DES的密匙长度是 56Bits 3DES的密匙长度是 168Bits **

谢谢各位

楼主 我有一个类似问题，困扰我很久了，您能帮我分析下吗？ Java里面key是直接数组 KEY: private static byte[] getDesKey() { byte[] key = new byte[24]; MessageDigest digest; String norInfo = “asfasdadsf asdfasi12”; try { digest = MessageDigest.getInstance(“md5”); } catch (NoSuchAlgorithmException e) { throw new RuntimeException(e.getMessage(), e); }

	for (int i = 0; i < 3; i++)
	{

		byte[] buf = digest.digest(norInfo.substring(i).getBytes());
		for (int j = 0; j < 8; j++)
		{
			key[(j + i * 8)] = buf[j];
		}
	}
	
	return key;
}

加密		SecretKey deskey = new SecretKeySpec(KEY, "DESede");
	Cipher cipher = Cipher.getInstance("DESede");
	cipher.init(1, deskey);
	return cipher.doFinal(source);

现在我需要用nodejs实现这套
var encrypt3Des = function(data, key, iv) {  
var keys = getDesKey(key);  
var iv = new Buffer(iv ? iv : 0);
var plaintext = data;
var alg = 'des-ede3';
var autoPad = true;        
//encrypt  	
var cipher = crypto.createCipheriv(alg, key, iv);  
cipher.setAutoPadding(autoPad);  //default true  
var ciph = cipher.update(plaintext, 'utf8', 'hex');  
ciph += cipher.final('hex');
return (new Buffer(ciph).toString("base64"));

 var getDesKey = function(norInfo){
var key = new Buffer(24);
for (var i = 0; i < 3; i++)
{
	var str = getBytes(norInfo.substring(i));
	console.log(str);
    var buf = encryptMd51(str);
	console.log(buf)
	for (var j = 0; j < 8; j++)
	{
		
		key[(j + i * 8)] = buf[j];
	}
}

return key;

}

 function getBytes(str) {

var bytes = [], char; str = encodeURI(str);

while (str.length) { char = str.slice(0, 1); str = str.slice(1);

if ('%' !== char) {
  bytes.push(char.charCodeAt(0));
} else {
  char = str.slice(0, 2);
  str = str.slice(2);

  bytes.push(parseInt(char, 16));
}

}

return bytes; };

nodejs加密和java加密出来始终不对。能指导下吗？

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