157 lines
4.0 KiB
PHP
Executable File
157 lines
4.0 KiB
PHP
Executable File
<?php
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class CryptAES
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{
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protected $cipher = MCRYPT_RIJNDAEL_128;
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protected $mode = MCRYPT_MODE_ECB;
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protected $pad_method = NULL;
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protected $secret_key = '';
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protected $iv = '';
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public function set_cipher($cipher)
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{
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$this->cipher = $cipher;
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}
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public function set_mode($mode)
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{
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$this->mode = $mode;
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}
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public function set_iv($iv)
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{
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$this->iv = $iv;
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}
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public function set_key($key)
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{
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$this->secret_key = $key;
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}
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public function require_pkcs5()
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{
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$this->pad_method = 'pkcs5';
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}
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protected function pad_or_unpad($str, $ext)
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{
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if ( is_null($this->pad_method) )
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{
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return $str;
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}
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else
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{
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$func_name = __CLASS__ . '::' . $this->pad_method . '_' . $ext . 'pad';
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if ( is_callable($func_name) )
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{
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$size = @mcrypt_get_block_size($this->cipher, $this->mode);
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return call_user_func($func_name, $str, $size);
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}
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}
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return $str;
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}
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protected function pad($str)
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{
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return $this->pad_or_unpad($str, '');
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}
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protected function unpad($str)
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{
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return $this->pad_or_unpad($str, 'un');
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}
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public function encrypt($str)
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{
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$str = $this->pad($str);
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$td = mcrypt_module_open($this->cipher, '', $this->mode, '');
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if ( empty($this->iv) )
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{
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$iv = @mcrypt_create_iv(mcrypt_enc_get_iv_size($td), MCRYPT_RAND);
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}
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else
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{
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$iv = $this->iv;
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}
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mcrypt_generic_init($td, hex2bin($this->secret_key), $iv);
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$cyper_text = mcrypt_generic($td, $str);
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$rt = strtoupper(bin2hex($cyper_text));
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mcrypt_generic_deinit($td);
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mcrypt_module_close($td);
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return $rt;
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}
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public function encryptNew($str)
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{
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$str = $this->pad($str);
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$td = @mcrypt_module_open($this->cipher, '', $this->mode, '');
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if ( empty($this->iv) )
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{
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$iv = @mcrypt_create_iv(mcrypt_enc_get_iv_size($td), MCRYPT_RAND);
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}
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else
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{
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$iv = $this->iv;
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}
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//mcrypt_generic_init($td, hex2bin($this->secret_key), $iv);
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@mcrypt_generic_init($td, $this->secret_key, $iv);
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$cyper_text = @mcrypt_generic($td, $str);
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//$rt = strtoupper(bin2hex($cyper_text));
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$rt = base64_encode($cyper_text);
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@mcrypt_generic_deinit($td);
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@mcrypt_module_close($td);
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return $rt;
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}
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public function decrypt($str){
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$td = @mcrypt_module_open($this->cipher, '', $this->mode, '');
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if ( empty($this->iv) )
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{
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$iv = @mcrypt_create_iv(mcrypt_enc_get_iv_size($td), MCRYPT_RAND);
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}
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else
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{
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$iv = $this->iv;
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}
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@mcrypt_generic_init($td, $this->secret_key, $iv);
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//$decrypted_text = mdecrypt_generic($td, self::hex2bin($str));
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$decrypted_text = @mdecrypt_generic($td, base64_decode($str));
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$rt = $decrypted_text;
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@mcrypt_generic_deinit($td);
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@mcrypt_module_close($td);
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return $this->unpad($rt);
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}
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public static function hex2bin($hexdata) {
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$bindata = '';
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$length = strlen($hexdata);
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for ($i=0; $i< $length; $i += 2)
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{
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$bindata .= chr(hexdec(substr($hexdata, $i, 2)));
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}
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return $bindata;
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}
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public static function pkcs5_pad($text, $blocksize)
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{
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$pad = $blocksize - (strlen($text) % $blocksize);
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return $text . str_repeat(chr($pad), $pad);
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}
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public static function pkcs5_unpad($text)
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{
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$pad = ord($text{strlen($text) - 1});
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if ($pad > strlen($text)) return false;
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if (strspn($text, chr($pad), strlen($text) - $pad) != $pad) return false;
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return substr($text, 0, -1 * $pad);
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}
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} |