java和php对等的3DES加密算法_PHP_编程开发_程序员俱乐部

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。

参考文章：http://www.cnblogs.com/happyhippy/archive/2006/12/23/601353.html

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class="java" name="code">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[] randomIVBytes() {
        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

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<?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";
	$cipher_text = TripleDES::encryptText($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();
*/
?>