aes算法加密解密代码（aes加密）
aes算法加密解密代码（aes加密）
1. php的aes算法，加密时会存在空格，0，\0等方式进行补长，所以解密后需要进行trim操作，才能得到原数据串
2. aes加密后进行base64_encode，但是解密时，直接用aes进行解密，不需要先base64_decode.【这个操作很骚气】
function _decryptData($data,$password, $iv){
$decryptData=openssl_decrypt($data, 'aes-128-cbc', $password, OPENSSL_ZERO_PADDING, $iv);
$data =json_decode(trim($decryptData), true);
return $data;
}
function encryptData($data, $password, $iv){
$data = json_encode($data);//$data是一个数组，如果是字符串，请忽略此句.
$result = base64_encode(openssl_encrypt($data, 'aes-128-cbc', $password, OPENSSL_RAW_DATA, $iv));
return $result;
}
你解密的key必须是加密的key啊
你看看，你解密的时候又KeyGenerator.getInstance("AES").generateKey();这是重新搞了一个key啊，当然解不出来了
我估计你这代码人家原先是写在一起的吧，加密完了再直接解密给你看，人家只generateKey一次，自然很顺利，你分成了两个例子，居然分别generateKey，自然失败
class CryptAES
{
protected $cipher = MCRYPT_RIJNDAEL_128;
protected $mode = MCRYPT_MODE_ECB;
protected $pad_method = NULL;
protected $secret_key = '';
protected $iv = '';
public function set_cipher($cipher)
{
$this-cipher = $cipher;
}
public function set_mode($mode)
{
$this-mode = $mode;
}
public function set_iv($iv)
{
$this-iv = $iv;
}
public function set_key($key)
{
$this-secret_key = $key;
}
public function require_pkcs5()
{
$this-pad_method = 'pkcs5';
}
protected function pad_or_unpad($str, $ext)
{
if ( is_null($this-pad_method) )
{
return $str;
}
else
{
$func_name = __CLASS__ . '::' . $this-pad_method . '_' . $ext . 'pad';
if ( is_callable($func_name) )
{
$size = mcrypt_get_block_size($this-cipher, $this-mode);
return call_user_func($func_name, $str, $size);
}
}
return $str;
}
protected function pad($str)
{
return $this-pad_or_unpad($str, '');
}
protected function unpad($str)
{
return $this-pad_or_unpad($str, 'un');
}
public function encrypt($str)
{
$str = $this-pad($str);
$td = mcrypt_module_open($this-cipher, '', $this-mode, '');
if ( empty($this-iv) )
{
$iv = @mcrypt_create_iv(mcrypt_enc_get_iv_size($td), MCRYPT_RAND);
}
else
{
$iv = $this-iv;
}
mcrypt_generic_init($td, $this-secret_key, $iv);
$cyper_text = mcrypt_generic($td, $str);
$rt=base64_encode($cyper_text);
//$rt = bin2hex($cyper_text);
mcrypt_generic_deinit($td);
mcrypt_module_close($td);
return $rt;
}
public function decrypt($str){
$td = mcrypt_module_open($this-cipher, '', $this-mode, '');
if ( empty($this-iv) )
{
$iv = @mcrypt_create_iv(mcrypt_enc_get_iv_size($td), MCRYPT_RAND);
}
else
{
$iv = $this-iv;
}
mcrypt_generic_init($td, $this-secret_key, $iv);
//$decrypted_text = mdecrypt_generic($td, self::hex2bin($str));
$decrypted_text = mdecrypt_generic($td, base64_decode($str));
$rt = $decrypted_text;
mcrypt_generic_deinit($td);
mcrypt_module_close($td);
return $this-unpad($rt);
}
public static function hex2bin($hexdata) {
$bindata = '';
$length = strlen($hexdata);
for ($i=0; $i $length; $i += 2)
{
$bindata .= chr(hexdec(substr($hexdata, $i, 2)));
}
return $bindata;
}
public static function pkcs5_pad($text, $blocksize)
{
$pad = $blocksize - (@strlen($text) % $blocksize);
return $text . str_repeat(chr($pad), $pad);
}
public static function pkcs5_unpad($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 * $pad);
}
}
/*$keyStr = 'UITN25LMUQC436IM';
$plainText = 'this is a string will be AES_Encrypt';
$aes = new CryptAES();
$aes-set_key($keyStr);
$aes-require_pkcs5();
$encText = $aes-encrypt($plainText);
$decString = $aes-decrypt($encText);
echo $encText,"n",$decString;*/
