懂php和java的进来，求教一个问题

Question

1 和别的公司对接业务，对方java，我是php。2 双方把把数据先DES加密，再base64加密。进行传输3 对方发了一个java的加密解密，我应该照着做一个php的。但看不懂java代码。4 求大神能忙，万谢。 package com.ab.mediation.util; import java.io.File; import java.io.FileInputStream; import java.io.IOException; import java.io.InputStreamReader; import java.security.SecureRandom; import javax.crypto.Cipher; import javax.crypto.SecretKey; import javax.crypto.SecretKeyFactory; import javax.crypto.spec.DESKeySpec; import sun.misc.BASE64Decoder; import sun.misc.BASE64Encoder; /** * 对外接口数据加密/解密类 * @author xin * */ public class DesUtil { private final static String DES = "DES"; public static void main(String[] args) throws Exception { String tDoc = "";// 请求报文 String encoding = "GBK"; // 将函数参数赋给本地参数 String path = "/Users/jieliu/Code/a.txt"; // String path = "F:\\testxml\\requestAppPolInp881.xml"; String path1 = path; // 初始化文件对象f File f = new File(path1); // 初始化读数据流对象reader InputStreamReader reader = new InputStreamReader(new FileInputStream( path1), encoding); // 根据f文件长度初始化字符串数据c[] char c[] = new char[(int) (f.length())]; // 取到字符串长度，并将文件f内容写入数组c int length = reader.read(c); // 逐字节将字符串数组c[]，赋给变量tDoc for (int i = 0; i < length; i++) { tDoc = tDoc + c[i]; } String key = "12dc293d43db3b237849"; System.out.println(encrypt(tDoc, key)); System.out.println(decrypt(encrypt(tDoc, key), key)); } /** * Description 根据键值进行加密 * * @param data * @param key * 加密键byte数组 * @return * @throws Exception */ public static String encrypt(String data, String key) throws Exception { byte[] bt = encrypt(data.getBytes(), key.getBytes()); String strs = new BASE64Encoder().encode(bt); return strs; } /** * 指定字符编码方式并加密 * @param data * @param key * @param encoding * @return * @throws Exception */ public static String encrypt(String data, String key, String encoding) throws Exception { byte[] bt = encrypt(data.getBytes(encoding), key.getBytes()); String strs = new BASE64Encoder().encode(bt); return strs; } /** * Description 根据键值进行解密 * * @param data * @param key * 加密键byte数组 * @return * @throws IOException * @throws Exception */ public static String decrypt(String data, String key) throws IOException, Exception { if (data == null) return null; BASE64Decoder decoder = new BASE64Decoder(); byte[] buf = decoder.decodeBuffer(data); byte[] bt = decrypt(buf, key.getBytes()); return new String(bt); } /** * 根据键值解密并返回指定编码方式字符串 * @param data * @param key * @param encoding * @return * @throws IOException * @throws Exception */ public static String decrypt(String data, String key, String encoding) throws IOException, Exception { if (data == null) return null; BASE64Decoder decoder = new BASE64Decoder(); byte[] buf = decoder.decodeBuffer(data); byte[] bt = decrypt(buf, key.getBytes()); return new String(bt, encoding); } /** * Description 根据键值进行加密 * * @param data * @param key * 加密键byte数组 * @return * @throws Exception */ private static byte[] encrypt(byte[] data, byte[] key) throws Exception { // 生成一个可信任的随机数源 SecureRandom sr = new SecureRandom(); // 从原始密钥数据创建DESKeySpec对象 DESKeySpec dks = new DESKeySpec(key); // 创建一个密钥工厂，然后用它把DESKeySpec转换成SecretKey对象 SecretKeyFactory keyFactory = SecretKeyFactory.getInstance(DES); SecretKey securekey = keyFactory.generateSecret(dks); // Cipher对象实际完成加密操作 Cipher cipher = Cipher.getInstance(DES); // 用密钥初始化Cipher对象 cipher.init(Cipher.ENCRYPT_MODE, securekey, sr); return cipher.doFinal(data); } /** * Description 根据键值进行解密 * * @param data * @param key * 加密键byte数组 * @return * @throws Exception */ private static byte[] decrypt(byte[] data, byte[] key) throws Exception { // 生成一个可信任的随机数源 SecureRandom sr = new SecureRandom(); // 从原始密钥数据创建DESKeySpec对象 DESKeySpec dks = new DESKeySpec(key); // 创建一个密钥工厂，然后用它把DESKeySpec转换成SecretKey对象 SecretKeyFactory keyFactory = SecretKeyFactory.getInstance(DES); SecretKey securekey = keyFactory.generateSecret(dks); // Cipher对象实际完成解密操作 Cipher cipher = Cipher.getInstance(DES); // 用密钥初始化Cipher对象 cipher.init(Cipher.DECRYPT_MODE, securekey, sr); return cipher.doFinal(data); } }

Answer 1

已解决

class DES {
    protected $cipher; //密码
    protected $mode; //模式
    private $_secret_key; //密钥

    public function __construct($key, $cipher=MCRYPT_TRIPLEDES, $mode=MCRYPT_MODE_ECB) {
        $this->_secret_key = $key;
        $this->cipher = $cipher;
        $this->mode = $mode;
    }

    public function encrypt($str, $padding = true) {
        if ($padding) {
            $size = mcrypt_get_block_size($this->cipher, $this->mode);
            $pad = $size - (strlen($str) % $size);
            $str .= str_repeat(chr($pad), $pad);
        }

        $td = mcrypt_module_open($this->cipher, '', $this->mode, '');
        $iv = @mcrypt_create_iv(mcrypt_enc_get_iv_size($td), MCRYPT_RAND);
        mcrypt_generic_init($td, $this->_secret_key, $iv);
        $data = mcrypt_generic($td, $str);
        mcrypt_generic_deinit($td);
        mcrypt_module_close($td);

        return base64_encode($data);
    }

    public function decrypt($str, $padding = true) {
        $td = mcrypt_module_open($this->cipher, '', $this->mode, '');
        $iv = @mcrypt_create_iv(mcrypt_enc_get_iv_size($td), MCRYPT_RAND);
        mcrypt_generic_init($td, $this->_secret_key, $iv);
        $data = mdecrypt_generic($td, base64_decode($str));
        mcrypt_generic_deinit($td);
        mcrypt_module_close($td);

        if ($padding) {
            $pad = ord($data{strlen($data) - 1});
            return substr($data, 0, -1 * $pad);
        }
        return $data;
    }
}