Proyectos de Subversion LeadersLinked - Services

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222 efrain 1 
<?php
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declare(strict_types=1);
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namespace LeadersLinked\Library;
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class EasyAES {
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    private $iv;
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    private $key;
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    private $bit; //Only can use 128, 256
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    private $mode;
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    function __construct($key, $bit = 128, $iv = "") {
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        $this->bit = $bit;
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        // gen key
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        if($this->bit == 256){
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            $this->key = hash('SHA256', $key, true);
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            $this->mode = 'AES-256-CBC';
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        } else {
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            $this->key = hash('MD5', $key, true);
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            $this->mode = 'AES-128-CBC';
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        }
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        // gen iv
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        if($iv != ""){
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            $this->iv = hash('MD5', $iv, true);
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        } else {
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            //IV is not set. It doesn't recommend.
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            $this->iv = chr(0).chr(0).chr(0).chr(0).chr(0).chr(0).chr(0).chr(0).chr(0).chr(0).chr(0).chr(0).chr(0).chr(0).chr(0).chr(0);
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        }
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    }
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    function encrypt($str) {
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        if(version_compare(PHP_VERSION, '7.0.0', 'ge')) {
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            return $this->opensslEncrypt($str);
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        } else {
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            return $this->mcryptEncrypt($str);
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        }
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    }
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    function decrypt($str) {
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        if(version_compare(PHP_VERSION, '7.0.0', 'ge')) {
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            return $this->opensslDecrypt($str);
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        } else {
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            return $this->mcryptDecrypt($str);
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        }
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    }
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    private function opensslEncrypt($str) {
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        $data = openssl_encrypt($str, $this->mode, $this->key, OPENSSL_RAW_DATA, $this->iv);
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        return base64_encode($data);
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    }
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    private function opensslDecrypt($str) {
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        $decrypted = openssl_decrypt(base64_decode($str), $this->mode, $this->key, OPENSSL_RAW_DATA, $this->iv);
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        return $decrypted;
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    }
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    private function mcryptEncrypt($str) {
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        $mcryptMode = MCRYPT_RIJNDAEL_128;
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        if($this->bit == 256){
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            $mcryptMode = MCRYPT_RIJNDAEL_256;
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        }
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        //Open
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        $module = mcrypt_module_open($mcryptMode, '', MCRYPT_MODE_CBC, '');
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        mcrypt_generic_init($module, $this->key, $this->iv);
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        //Padding
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        $block = mcrypt_get_block_size($mcryptMode, MCRYPT_MODE_CBC); //Get Block Size
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        $pad = $block - (strlen($str) % $block); //Compute how many characters need to pad
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        $str .= str_repeat(chr($pad), $pad); // After pad, the str length must be equal to block or its integer multiples
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        //Encrypt
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        $encrypted = mcrypt_generic($module, $str);
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        //Close
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        mcrypt_generic_deinit($module);
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        mcrypt_module_close($module);
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        //Return
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        return base64_encode($encrypted);
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    }
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    private function mcryptDecrypt($str) {
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        $mcryptMode = MCRYPT_RIJNDAEL_128;
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        if($this->bit == 256){
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            $mcryptMode = MCRYPT_RIJNDAEL_256;
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        }
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        //Open
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        $module = mcrypt_module_open($mcryptMode, '', MCRYPT_MODE_CBC, '');
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        mcrypt_generic_init($module, $this->key, $this->iv);
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        //Decrypt
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        $str = mdecrypt_generic($module, base64_decode($str)); //Get original str
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        //Close
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        mcrypt_generic_deinit($module);
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        mcrypt_module_close($module);
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        //Depadding
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        $slast = ord(substr($str, -1)); //pad value and pad count
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        $str = substr($str, 0, strlen($str) - $slast);
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        //Return
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        return $str;
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    }
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223 efrain 110 
    /*
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    static function encryptString($content) {
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        //Set password and iv string here
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        $aes = new EasyAES('****************', 128, '################');
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        return $aes->encrypt($content);
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    }
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    static function decryptString($content) {
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        //Set password and iv string here
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        $aes = new  EasyAES('****************', 128, '################');
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        return $aes->decrypt($content);
223 efrain 121 
    }*/
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}