php java aes加密解密_php与java通用AES加密解密算法
{protected $cipher =MCRYPT_RIJNDAEL_128;protected $mode =MCRYPT_MODE_ECB;protected $pad_method =NULL;protected $secret_key = '';protected $iv = '';publicfunction set_cipher($cipher)
{
$this->cipher =$cipher;
}publicfunction set_mode($mode)
{
$this->mode =$mode;
}publicfunction set_iv($iv)
{
$this->iv =$iv;
}publicfunction set_key($key)
{
$this->secret_key =$key;
}publicfunction require_pkcs5()
{
$this->pad_method = 'pkcs5';
}protectedfunction pad_or_unpad($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, $this->mode);returncall_user_func($func_name, $str, $size);
}
}return$str;
}protectedfunction pad($str)
{return $this->pad_or_unpad($str, '');
}protectedfunction unpad($str)
{return $this->pad_or_unpad($str, 'un');
}publicfunction 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$rt;
}publicfunction decrypt($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 staticfunction hex2bin($hexdata) {
$bindata= '';
$length=strlen($hexdata);for ($i=0; $i amp;< $length; $i += 2)
{
$bindata .= chr(hexdec(substr($hexdata, $i, 2)));
}return$bindata;
}public staticfunction pkcs5_pad($text, $blocksize)
{
$pad= $blocksize - (strlen($text) %$blocksize);return$text . str_repeat(chr($pad), $pad);
}public staticfunction pkcs5_unpad($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= newCryptAES();
$aes->set_key($keyStr);
$aes->require_pkcs5();
$encText= $aes->encrypt($plainText);
$decString= $aes->decrypt($encText);
echo $encText,"n",$decString;?>