标准的3DES加密&解密（Java 和 PHP 版）

STD3DES.java

// javac test3.java
// java test3
import java.security.Key;

import javax.crypto.Cipher;
import javax.crypto.SecretKeyFactory;
import javax.crypto.spec.DESedeKeySpec;
import javax.crypto.spec.IvParameterSpec;


import sun.misc.BASE64Decoder;
import sun.misc.BASE64Encoder;

/**
 *
 * @author Administrator
 */
public class STD3Des {

    public static void main(String[] args) throws Exception {

        byte[] key = ("f510b8737344cddbca1c8564").getBytes();
		// byte[] keyiv = {0x66,0x6f,0x61,0x6f,0x63,0x75,0x65,0x6e};
		byte[] keyiv = {'f','o','a','o','c','u','e','n'};

        System.out.println("\r\nkey.length:" + key.length);
        byte[] data = "中国ABCabc1234".getBytes("UTF-8");

        System.out.println("ECB加密解密");
        byte[] str3 = des3EncodeECB(key, data);
        byte[] str4 = ees3DecodeECB(key, str3);
        System.out.println(new BASE64Encoder().encode(str3));
        System.out.println(new String(str4, "UTF-8"));

        System.out.println("<=============>");

       System.out.println("CBC加密解密");
       byte[] str5 = des3EncodeCBC(key, keyiv, data);
       byte[] str6 = des3DecodeCBC(key, keyiv, str5);
       System.out.println(new BASE64Encoder().encode(str5));
       System.out.println(new String(str6, "UTF-8"));

    }

    /**
     * ECB加密,不要IV
     *
     * @param key 密钥
     * @param data 明文
     * @return Base64编码的密文
     * @throws Exception
     */
    public static byte[] des3EncodeECB(byte[] key, byte[] data)
            throws Exception {

        Key deskey = null;
        DESedeKeySpec spec = new DESedeKeySpec(key);
        SecretKeyFactory keyfactory = SecretKeyFactory.getInstance("desede");
        deskey = keyfactory.generateSecret(spec);

        Cipher cipher = Cipher.getInstance("desede" + "/ECB/PKCS5Padding");

        cipher.init(Cipher.ENCRYPT_MODE, deskey);
        byte[] bOut = cipher.doFinal(data);

        return bOut;
    }

    /**
     * ECB解密,不要IV
     *
     * @param key 密钥
     * @param data Base64编码的密文
     * @return 明文
     * @throws Exception
     */
    public static byte[] ees3DecodeECB(byte[] key, byte[] data)
            throws Exception {

        Key deskey = null;
        DESedeKeySpec spec = new DESedeKeySpec(key);
        SecretKeyFactory keyfactory = SecretKeyFactory.getInstance("desede");
        deskey = keyfactory.generateSecret(spec);

        Cipher cipher = Cipher.getInstance("desede" + "/ECB/PKCS5Padding");

        cipher.init(Cipher.DECRYPT_MODE, deskey);

        byte[] bOut = cipher.doFinal(data);

        return bOut;

    }

    /**
     * CBC加密
     *
     * @param key 密钥
     * @param keyiv IV
     * @param data 明文
     * @return Base64编码的密文
     * @throws Exception
     */
    public static byte[] des3EncodeCBC(byte[] key, byte[] keyiv, byte[] data)
            throws Exception {

        Key deskey = null;
        DESedeKeySpec spec = new DESedeKeySpec(key);
        SecretKeyFactory keyfactory = SecretKeyFactory.getInstance("desede");
        deskey = keyfactory.generateSecret(spec);

        Cipher cipher = Cipher.getInstance("desede" + "/CBC/PKCS5Padding");
        IvParameterSpec ips = new IvParameterSpec(keyiv);
        cipher.init(Cipher.ENCRYPT_MODE, deskey, ips);
        byte[] bOut = cipher.doFinal(data);

        return bOut;
    }

    /**
     * CBC解密
     *
     * @param key 密钥
     * @param keyiv IV
     * @param data Base64编码的密文
     * @return 明文
     * @throws Exception
     */
    public static byte[] des3DecodeCBC(byte[] key, byte[] keyiv, byte[] data)
            throws Exception {

        Key deskey = null;
        DESedeKeySpec spec = new DESedeKeySpec(key);
        SecretKeyFactory keyfactory = SecretKeyFactory.getInstance("desede");
        deskey = keyfactory.generateSecret(spec);

        Cipher cipher = Cipher.getInstance("desede" + "/CBC/PKCS5Padding");
        IvParameterSpec ips = new IvParameterSpec(keyiv);

        cipher.init(Cipher.DECRYPT_MODE, deskey, ips);

        byte[] bOut = cipher.doFinal(data);

        return bOut;

    }

}

STD3DES.php

<?php

/**
 * 3des 对称加密解密，与 java c#兼容
 * $iv cbc 分组模式的偏移量，没有则使用 ecb 模式
 */
class STD3Des {

    private $key  = "";
    private $iv   = "";
    private $mode = MCRYPT_MODE_CBC;

    /**
     * 构造，传递二个已经进行 base64_encode 的 KEY 与 IV
     *
     * @param string $key
     * @param string $iv
     */
    function __construct($key, $iv = null) {
        if (empty($key)) {
            echo 'key is not valid';
            exit();
        }
        if ($iv == null) {
            $iv         = $key;
            $this->mode = MCRYPT_MODE_ECB;
        }
        $this->key = $key;
        $this->iv  = $iv;
    }

    /**
     * 加密
     * @param <type> $value
     * @return <type>
     */
    public function encrypt($value) {
        $td    = mcrypt_module_open(MCRYPT_3DES, '', $this->mode, '');
        $iv    = $this->mode == MCRYPT_MODE_CBC ? base64_decode($this->iv) : mcrypt_create_iv(mcrypt_enc_get_iv_size($td), MCRYPT_RAND);
        $value = $this->PaddingPKCS7($value);
        //$key   = base64_decode($this->key); // 对京东风控 API 不适用
        mcrypt_generic_init($td, $key, $iv);
        $dec   = mcrypt_generic($td, $value);
        $ret   = base64_encode($dec);
        mcrypt_generic_deinit($td);
        mcrypt_module_close($td);
        return $ret;
    }

    /**
     * 解密
     * @param <type> $value
     * @return <type>
     */
    public function decrypt($value) {
        $td  = mcrypt_module_open(MCRYPT_3DES, '', $this->mode, '');
        $iv  = $this->mode == MCRYPT_MODE_CBC ? base64_decode($this->iv) : mcrypt_create_iv(mcrypt_enc_get_iv_size($td), MCRYPT_RAND);
        //$key = base64_decode($this->key); // 对京东风控 API 不适用
        mcrypt_generic_init($td, $key, $iv);
        $ret = trim(mdecrypt_generic($td, base64_decode($value)));
        $ret = $this->UnPaddingPKCS7($ret);
        mcrypt_generic_deinit($td);
        mcrypt_module_close($td);
        return $ret;
    }

    private function PaddingPKCS7($data) {
        $block_size   = mcrypt_get_block_size('tripledes', $this->mode);
        $padding_char = $block_size - (strlen($data) % $block_size);
        $data .= str_repeat(chr($padding_char), $padding_char);
        return $data;
    }

    private function UnPaddingPKCS7($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);
    }

}

关于调用京东风控 API 的加密解密注意项：

1. PHP 版代码 41 行，注释掉
2. PHP 版代码 58 行，注释掉

Great. Thanks.

加密或者解密的$key 应该是$this->key