java3des.net_java与.NET通用的3DES加密解密方法

import java.security.Key;

import javax.crypto.Cipher;

import javax.crypto.SecretKeyFactory;

import javax.crypto.spec.DESedeKeySpec;

import sun.misc.BASE64Decoder;

import sun.misc.BASE64Encoder;

public class 3DESUtil {

/**

* ECB加密,不要IV

* &＃64;param key 密钥

* &＃64;param data 明文

* &＃64;return Base64编码的密文

* &＃64;throws Exception

*/

public static String des3EncodeECB(String key, String data)

throws Exception {

key &＃61; procKey(key);

byte[] newkey &＃61; new BASE64Decoder().decodeBuffer(key);

Key deskey &＃61; null;

DESedeKeySpec spec &＃61; new DESedeKeySpec(newkey);

SecretKeyFactory keyfactory &＃61; SecretKeyFactory.getInstance("desede");

deskey &＃61; keyfactory.generateSecret(spec);

Cipher cipher &＃61; Cipher.getInstance("desede" &＃43; "/ECB/PKCS5Padding");

cipher.init(Cipher.ENCRYPT_MODE, deskey);

byte[] newdata &＃61; data.getBytes("UTF-8");

byte[] bOut &＃61; cipher.doFinal(newdata);

return new BASE64Encoder().encode(bOut);

}

/**

* ECB解密,不要IV

* &＃64;param key 密钥

* &＃64;param data Base64编码的密文

* &＃64;return 明文

* &＃64;throws Exception

*/

public static String ees3DecodeECB(String key, String data)

throws Exception {

key &＃61; procKey(key);

byte[] newkey &＃61; new BASE64Decoder().decodeBuffer(key);

Key deskey &＃61; null;

DESedeKeySpec spec &＃61; new DESedeKeySpec(newkey);

SecretKeyFactory keyfactory &＃61; SecretKeyFactory.getInstance("desede");

deskey &＃61; keyfactory.generateSecret(spec);

Cipher cipher &＃61; Cipher.getInstance("desede" &＃43; "/ECB/PKCS5Padding");

cipher.init(Cipher.DECRYPT_MODE, deskey);

byte[] newdata &＃61; new BASE64Decoder().decodeBuffer(data);

byte[] bOut &＃61; cipher.doFinal(newdata);

return new String(bOut,"UTF-8");

}

private static String procKey(String key) {

if(key.length()<32) {

while(key.length()<32) {

key &＃61; key &＃43; "0";

}

return key;

}else if(key.length()>32) {

return key.substring(0,32);

}

return key;

}

}