JAVA 和php对等的3DES加密算法，ECB的加密模式没有CBC安全，iv是初始向量相当于种子
JAVA代码：
package org.jamie.demo;
import java.security.NoSuchAlgorithmException;
import java.security.Security;
import java.util.Random;
import javax.crypto.Cipher;
import javax.crypto.KeyGenerator;
import javax.crypto.SecretKey;
import javax.crypto.SecretKeyFactory;
import javax.crypto.spec.DESedeKeySpec;
import javax.crypto.spec.IvParameterSpec;
@SuppressWarnings(“restriction”)
public class TripleDES {
static {
Security.addProvider(new com.sun.crypto.provider.SunJCE());
}
private static final String MCRYPT_TRIPLEDES = “DESede”;
private static final String TRANSFORMATION = “DESede/CBC/PKCS5Padding”;
public static Byte [] decrypt(byte[] data, byte[] key, byte[] iv) throws Exception {
DESedeKeySpec spec = new DESedeKeySpec(key);
SecretKeyFactory keyFactory = SecretKeyFactory. getInstance (MCRYPT_TRIPLEDES);
SecretKey sec = keyFactory.generateSecret(spec);
Cipher cipher = Cipher.getInstance(TRANSFORMATION);
IvParameterSpec IvParameters = new IvParameterSpec(iv);
cipher.init(Cipher.DECRYPT_MODE, sec, IvParameters);
return cipher.doFinal(data);
}
public static byte[] encrypt(byte[] data, byte[] key, byte[] iv) throws Exception {
DESedeKeySpec spec = new DESedeKeySpec(key);
SecretKeyFactory keyFactory = SecretKeyFactory.getInstance(“DESede”);
SecretKey sec = keyFactory.generateSecret(spec);
Cipher cipher = Cipher.getInstance(TRANSFORMATION);
IvParameterSpec IvParameters = new IvParameterSpec(iv);
cipher.init(Cipher.ENCRYPT_MODE, sec, IvParameters);
return cipher.doFinal(data);
}
public static byte[] generateSecretKey() throws NoSuchAlgorithmException {
KeyGenerator keygen = KeyGenerator.getInstance(MCRYPT_TRIPLEDES);
return keygen.generateKey().getEncoded();
}
public static byte[] randomIV bytes () {
Random ran = new Random();
byte[] bytes = new byte[8];
for (int i = 0; i < bytes.length; ++i) {
bytes[i] = (byte) ran.nextInt(Byte.MAX_VALUE + 1);
}
return bytes;
}
public static void main(String args[]) throws Exception {
String plainText = “a12*&1c中文”;
final byte[] secretBytes = TripleDES.generateSecretKey();
final byte[] ivbytes = TripleDES.randomIVBytes();
System.out.println(“plain text: ” + plainText);
byte[] encrypt = TripleDES.encrypt(plainText.getBytes(), secretBytes, ivbytes);
System.out.println(“cipher text: ” + encrypt);
System.out.println(“decrypt text: ” + new String(TripleDES.decrypt(encrypt, secretBytes, ivbytes), “UTF-8”));
}
}
PHP代码：
<?php
class TripleDES {
public static function genIvParameter() {
return mcrypt_create_iv(mcrypt_get_iv_size(MCRYPT_TRIPLEDES,MCRYPT_MODE_CBC), MCRYPT_RAND);
}
private static function pkcs5Pad($text, $blocksize) {
$pad = $blocksize – (strlen($text) % $blocksize); // in php, strlen returns the bytes of $text
return $text . str_repeat(chr($pad), $pad);
}
private static function pkcs5Unpad($text) {
$pad = ord($text{strlen($text)-1});
if ($pad > strlen($text)) return false;
if (strspn($text, chr($pad), strlen($text) – $pad) != $pad) return false;
return substr($text, 0, -1 * $pad);
}
public static function encryptText($plain_text, $key, $iv) {
$padded = TripleDES::pkcs5Pad($plain_text, mcrypt_get_block_size(MCRYPT_TRIPLEDES, MCRYPT_MODE_CBC));
return mcrypt_encrypt(MCRYPT_TRIPLEDES, $key, $padded, MCRYPT_MODE_CBC, $iv);
}
public static function decryptText($cipher_text, $key, $iv) {
$plain_text = mcrypt_decrypt(MCRYPT_TRIPLEDES, $key, $cipher_text, MCRYPT_MODE_CBC, $iv);
return TripleDES::pkcs5Unpad($plain_text);
}
};
/*
function main() {
$iv = TripleDES::genIvParameter();
print “\$iv=$iv\n”;
$plain_text=”this is a test，包括中文”;
$key=”ABCDEFGHIJ0123456789ABCD”; //此处要注意key 必须是24位的，不够的要补全
$cipher_text = TripleDES::encryptText($plain_text, $key, $iv);
print “\$cipher_text=$cipher_text\n”;
$plain_text = TripleDES::decryptText($cipher_text, $key, $iv);
print “\$plain_text=$plain_text\n”;
}
main();
*/
?>
