本文实例讲述了PHP实现的AES加密类定义与用法。分享给大家供大家参考,具体如下:
PHP;">
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,$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,-1 * $pad);
}
}
?>
用法:
hex2bin($keyStr);
$aes->set_key($keyStr);
$aes->require_pkcs5();
$d = $aes->encrypt($data);
注:
PHP.ini中开启:extension=PHP_mcrypt.dll
PS:关于加密解密感兴趣的朋友还可以参考本站在线工具:
文字在线加密解密工具(包含AES、DES、RC4等):
在线MD5/hash/SHA-1/SHA-2/SHA-256/SHA-512/SHA-3/RIPEMD-160加密工具:
在线sha1/sha224/sha256/sha384/sha512加密工具:
更多关于PHP相关内容感兴趣的读者可查看本站专题:《》、《》、《》、《》、《》、《》、《》及《PHP正则表达式用法总结》
希望本文所述对大家PHP程序设计有所帮助。