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/home/pharmacy/public_html/wp-content/plugins/sendpress/classes/class-sendpress-base.php
<?php 

// Prevent loading this file directly
if ( !defined('SENDPRESS_VERSION') ) {
    header('HTTP/1.0 403 Forbidden');
    die;
}

class SendPress_Base {

	/**
     * Decrypt Text Data
     **/
   static  function _decrypt( $text, $key = 'E0fRGYRjiMlAZsubeDYzPfpJHuUjRWigHuSRRFkm1wKPCrjeKM' ) {
        if ( function_exists( 'mcrypt_decrypt' ) ) {
            return trim( @mcrypt_decrypt( MCRYPT_RIJNDAEL_256, $key, base64_decode( $text ), MCRYPT_MODE_ECB ) );
        } else {
            return $text;
        }
    }

    /**
     * Encrypt and decrypt
     *
     * @author Nazmul Ahsan <n.mukto@gmail.com>
     * @link http://nazmulahsan.me/simple-two-way-function-encrypt-decrypt-string/
     *
     * @param string $string string to be encrypted/decrypted
     * @param string $action what to do with this? e for encrypt, d for decrypt
     * @return bool|string
     */
    static function my_simple_crypt( $string, $action = 'e' , $key = 'E0fRGYRjiMlAZsubeDYzPfpJHuUjRWigHuSRRFkm1wKPCrjeKM') {
        // you may change these values to your own
        $secret_key = $key;
        $secret_iv = $key;
        $output = false;
        $encrypt_method = "AES-256-CBC";
        $key = hash( 'sha256', $secret_key );
        $iv = substr( hash( 'sha256', $secret_iv ), 0, 16 );
        if( $action == 'e' ) {
            $output = base64_encode( openssl_encrypt( $string, $encrypt_method, $key, 0, $iv ) );
        }
        else if( $action == 'd' ){
            $output = openssl_decrypt( base64_decode( $string ), $encrypt_method, $key, 0, $iv );
        }
        return $output;
    }

}