https://gist.github.com/forthxu/ebddb968059f2b844fa9
class STD3Des {
private $key = "";
private $iv = "";
private $mode = MCRYPT_MODE_ECB;
function __construct($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 = $iv;
}
public function encrypt($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);
mcrypt_generic_init($td, $key, $iv);
$dec = mcrypt_generic($td, $value);
$ret = base64_encode($dec);
mcrypt_generic_deinit($td);
mcrypt_module_close($td);
return $ret;
}
public function decrypt($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);
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);
}
}
传入的key 需要base64下
$des = new STD3Des(base64_encode('886b4DXf0F329XC34b4b57Sd'));
$data = $des->encrypt(json_encode(array('username' => $username, 'password' => md5($password))));
