phpseclib
Java代码
- <?php
- //set_include_path(get_include_path().PATH_SEPARATOR.'phpseclib');
- include('Crypt/DES.php');
- $des = new Crypt_DES();
- $des->setKey('abcdefgh');
- $plaintext = 'a';
- $jiami = base64_encode($des->encrypt($plaintext));
- echo "Encode:".$jiami."<br/>";
- echo "Decode:".$des->decrypt(base64_decode($jiami));
- ?>
由于PHP使用mcrypt扩展进行3DES加密，填充模式是跟Java以及.NET是不一样的，JAVA和.NET填充模式使用的是PKCS7。
所以PHP端必须自定义一个函数对加密字符串进行PKCS7模式补位填充 。
另外一点就是双方的KEY注意进行base64编码，最后PHP端经过3DES加密后得到的结果也需要进行base64编码。
以上几点都做好之后，加密结果就一致了。
再谷歌一番发现这么一段代码（原作者“幻想曲.NET”），实现了上述规则，这个3DES加密类兼容.net 和java ：
Java代码
- <?php
- class STD3Des
- {
- private $key = "";
- private $iv = "";
- /**
- * 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, $iv)
- {
- if (empty($key) || empty($iv)) {
- echo 'key and iv is not valid';
- exit();
- }
- $this->key = $key;
- $this->iv = $iv;
- }
- /**
- *加密
- * @param <type> $value
- * @return <type>
- */
- public function encrypt($value)
- {
- $td = mcrypt_module_open(MCRYPT_3DES, '', MCRYPT_MODE_CBC, '');
- $iv = base64_decode($this->iv);
- $value = $this->PaddingPKCS7($value);
- $key = base64_decode($this->key);
- mcrypt_generic_init($td, $key, $iv);
- $ret = base64_encode(mcrypt_generic($td, $value));
- mcrypt_generic_deinit($td);
- mcrypt_module_close($td);
- return $ret;
- }
- /**
- *解密
- * @param <type> $value
- * @return <type>
- */
- public function decrypt($value)
- {
- $td = mcrypt_module_open(MCRYPT_3DES, '', MCRYPT_MODE_CBC, '');
- $iv = base64_decode($this->iv);
- $key = base64_decode($this->key);
- 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', 'cbc');
- $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);
- }
- }
- //使用
- include('STD3Des.class.php');
- $key = 'abcdefgh';
- $iv = 'abcdefgh';
- $msg = 'test string';
- $des = new STD3Des(base64_encode($key), base64_encode($iv));
- $rs1 = $des->encrypt($msg);
- echo $rs1 . '<br />';
- $rs2 = $des->decrypt($rs1);
- echo $rs2;
- ?>
