Convert Encrypt / Decrypt PHP function to Node JS

I have no time to do it so I need someone to convert two functions from PHP code to Node JS. - Make this functions easy to use by creating a module so I can just do something like > var encdec = require('encdec'); < (this is not for redistribute, it is for a private project, so no need manuals nor any extras) and then I can just do > [login to view URL]('myEncryptedString'); < - This one returns a false on fail (which never happen) but try to do it error free as much as possible. /** * 256-bit decryption with mcrypt * MCRYPT_RIJNDAEL_128 is AES-compliant, and MCRYPT_MODE_CBC * Note: ECB mode is inadequate for many purposes because it does not use an IV * * @param string $encrypted receives the encrypted string to decrypt * return bool false on fail, or decrypted string if succeeded */ function myDecrypt ($encrypted) { // salt $salt = '!kqM*Ff7pXe1kBn%9'; // Build a 256-bit $key which is a SHA256 hash of $salt and $password. $key = hash('SHA256', $salt ."LPC9aVs3w8k45vx7oHOxZgoNus3banTGPp5wmhJ6hSnJko9rjB/G5Q1mdhdxjm01q6kK2h44MP5L6DML4nY/uq", true); // Retrieve $iv which is the first 22 characters plus ==, base64_decoded. $iv = base64_decode(substr($encrypted, 0, 22) . '=='); // Remove $iv from $encrypted. $encrypted = substr($encrypted, 22); // Decrypt the data. rtrim won't corrupt the data because the last 32 characters are the md5 hash; thus any \0 character has to be padding. @$decrypted = rtrim(mcrypt_decrypt(MCRYPT_RIJNDAEL_128, $key, base64_decode($encrypted), MCRYPT_MODE_CBC, $iv), "\0\4"); // Retrieve $hash which is the last 32 characters of $decrypted. $hash = substr($decrypted, - 32); // Remove the last 32 characters from $decrypted. $decrypted = substr($decrypted, 0, - 32); // Integrity check. If this fails, either the data is corrupted, or the password/salt was incorrect. if (md5($decrypted) != $hash) return false; // Yay! return $decrypted; } /** * 256-bit encryption with mcrypt * MCRYPT_RIJNDAEL_128 is AES-compliant, and MCRYPT_MODE_CBC * Note: ECB mode is inadequate for many purposes because it does not use an IV * * @param string $decrypted receives the unencrypted string to encrypt * return bool false on fail, or encrypted string if succeeded */ function myEncrypt($decrypted) { // salt $salt = '!kqM*Ff7pXe1kBn%9'; // Build a 256-bit $key which is a SHA256 hash of $salt and $password. $key = hash('SHA256', $salt ."LPC9aVs3w8k45vx7oHOxZgoNus3banTGPp5wmhJ6hSnJko9rjB/G5Q1mdhdxjm01q6kK2h44MP5L6DML4nY/uq", true); // Build $iv and $iv_base64. We use a block size of 128 bits (AES compliant) and CBC mode. (Note: ECB mode is inadequate as IV is not used.) srand(); $iv = mcrypt_create_iv(mcrypt_get_iv_size(MCRYPT_RIJNDAEL_128, MCRYPT_MODE_CBC), MCRYPT_RAND); if (strlen($iv_base64 = rtrim(base64_encode($iv), '=')) != 22) return false; // Encrypt $decrypted and an MD5 of $decrypted using $key. MD5 is fine to use here because it's just to verify successful decryption. $encrypted = base64_encode(mcrypt_encrypt(MCRYPT_RIJNDAEL_128, $key, $decrypted . md5($decrypted), MCRYPT_MODE_CBC, $iv)); // We're done! return $iv_base64 . $encrypted; }