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;
}
Hi, after reading your requirements i decided to place a bid on this project.
I lead a team of node.js development. My total experience in node.js is around three years.
overall IT experience is 7 years.
We have experienced team of experts of Node.js, html designers, mongodb and web applications.
We can discuss more on skype username 'morwal89'.
Hope to hear back.
Thank you.
$35 USD σε 1 ημέρα
5,0 (1 αξιολόγηση)
1,8
1,8
6 freelancers δίνουν μια μέση προσφορά $43 USD για αυτή τη δουλειά
Hello, The task is trivial. I will create a node module (wrapper over crypto module) which exports two functions: encrypt and decrypt. I have a 4 years experience in designing complex software using python and nodejs.
Thank you and good luck!
I am a highly experienced developer and very familiar with javascript and node.js
Your task is straight-forward and I will complete it very quickly with unit tests included.