Livecode mergAESEncryptWithKey function - php

Question

I want to encrypt data in livecode using mergAESEncryptWithKey pData,pKey,pIV,[pMode],[pKeySize],[pPadding]. The encrypted data is then posted to php. PhP decrypts the data using the same function, does something with the data and then encrypts the results and posts them to livecode. Livecode then decrypts the data from php
My PHP Code looks like this (This works perfect)
function encrypt($plaintext, $salt) {
$method = "AES-256-CBC";
$key = hash('sha256', $salt, true);
$iv = openssl_random_pseudo_bytes(32);
$ciphertext = openssl_encrypt($plaintext, $method, $key, $iv);
$hash = hash_hmac('sha256', $ciphertext . $iv, $key, true);
return $iv . $hash . $ciphertext;
}
function decrypt($ivHashCiphertext, $salt) {
$method = "AES-256-CBC";
$iv = substr($ivHashCiphertext, 0, 32);
$hash = substr($ivHashCiphertext, 32, 48);
$ciphertext = substr($ivHashCiphertext, 64);
$key = hash('sha256', $salt, true);
//if (!hash_equals(hash_hmac('sha256', $ciphertext . $iv, $key, true), $hash)) return null;
return openssl_decrypt($ciphertext, $method, $key, $iv);
}
echo $encrypted."</br>";
echo "----------------------------The message is:<br/>";
echo decrypt($encrypted, 'hashsalt');

Answer 1

For most of you who just don't know but still want to post good for nothing comments, I figured it out. #Sammitch and #Mark asking a question don't mean someone is stupid.
/*
* Encrypt or decrypt data using
* AES-256-CBC
*/
function encrypt_decrypt($mode,$data,$key,$salt){
//define the cipher method
$ciphering = "AES-256-CBC";
// Use OpenSSl Encryption method. This works on PHP 7.2 and above
$iv_length = openssl_cipher_iv_length($ciphering);
$options = 0;
if($mode=="encrypt"){
// Use openssl_encrypt() function to encrypt the data
$Data = openssl_encrypt($data, $ciphering, $key, $options, $salt);
}else{
// Use openssl_decrypt() function to decrypt the data
$Data = openssl_decrypt($data, $ciphering, $key,$options, $salt);
}
return $Data;
}
Oooh and this is for livecode
//encrypt
encrypt tString using "aes-256-cbc" with key theKey and IV saltHash at 256 bit
//decrypt
decrypt base64Decode(varEnc) using "aes-256-cbc" with key theKey and IV saltHash at 256 bit