我使用 DES 加密 nodeJs 中的字符串参数,但是如何在 Java 中正确使用 DES 解密。
在nodejs中我使用这种方法来加密:https ://github.com/ElmerZhang/ezcrypto/blob/master/lib/des.js
var DES = C.DES = {
_blockSize : 2,
_keyschedule : null,
_state : new State(),
_init : function(k) {
this._keyschedule = new KeySchedule(k);
},
encrypt : function(message, password, options) {
options = options || {};
// Determine mode
var mode = options.mode || new C.mode.OFB;
// Allow mode to override options
if (mode.fixOptions)
mode.fixOptions(options);
var
// Convert to bytes if message is a string
m = (message.constructor == String ? UTF8.stringToBytes(message)
: message),
// Generate random IV
iv = options.iv || util.randomBytes(8),
// Generate key
k = (password.constructor == String ?
// Derive key from passphrase
C.PBKDF2(password, iv, 8, {
asBytes : true
}) :
// else, assume byte array representing cryptographic key
password);
// Create key schedule
this._keyschedule = new KeySchedule(k);
// Encrypt
mode.encrypt(DES, m, iv);
// Return ciphertext
m = options.iv ? m : iv.concat(m);
return (options && options.asBytes) ? m : util.bytesToBase64(m);
},
_encryptBlock : function(message, offset) {
this._state.initialPerm(message, offset);
for ( var i = 0; i <= 15; i++) {
this._state.round(this._keyschedule.getKey(i));
}
this._state.finalPerm(message, offset);
}
};
这是我在java中的des解密:
public class DES {
private static byte[] iv = {1,2,3,4,5,6,7,8};
public static String encryptDES(String encryptString, String encryptKey) throws Exception {
IvParameterSpec zeroIv = new IvParameterSpec(iv);
SecretKeySpec key = new SecretKeySpec(encryptKey.getBytes(), "DES");
Cipher cipher = Cipher.getInstance("DES/CBC/PKCS5Padding");
cipher.init(Cipher.ENCRYPT_MODE, key, zeroIv);
byte[] encryptedData = cipher.doFinal(encryptString.getBytes());
return Base64.encode(encryptedData);
}
public static String decryptDES(String decryptString, String decryptKey) throws Exception {
byte[] byteMi = new Base64().decode(decryptString);
IvParameterSpec zeroIv = new IvParameterSpec(iv);
SecretKeySpec key = new SecretKeySpec(decryptKey.getBytes(), "DES");
Cipher cipher = Cipher.getInstance("DES/CBC/PKCS5Padding");
cipher.init(Cipher.DECRYPT_MODE, key, zeroIv);
byte decryptedData[] = cipher.doFinal(byteMi);
return new String(decryptedData);
}
}