I want to encrypt a data with PHP. I before used from a javascript code to encrypt.
JavaScript Code:
const SHARED_KEY="XXelkee4v3WjMP81fvjgpNRs2u2cwJ7n3lnJzPt8iVY=";
const ZERO_IV=[0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0];
let data="6104337983063890";
aesEncrypt = async (data) => {
try{
let key = new Uint8Array(this.base64ToArray(SHARED_KEY));
let aes = new aesJs.ModeOfOperation.cbc(key, ZERO_IV)
let bData = aesJs.utils.utf8.toBytes(data);
let encBytes = aes.encrypt(aesJs.padding.pkcs7.pad(bData))
return this.arrayToHex(encBytes)
}catch(err) {
console.error(err)
return null
}
}
PHP Code:
$sharedSecret=base64_decode('XXelkee4v3WjMP81fvjgpNRs2u2cwJ7n3lnJzPt8iVY=');
$iv = '0000000000000000';
$data="6104337983063890";
$output = openssl_encrypt(
$data,
'AES-128-CBC',
$sharedSecret,
OPENSSL_RAW_DATA,
$iv
);
$output=bin2hex($output);
Output in two languages is:
JavaScript: 4b685c988d9e166efd0bc5830e926ae0d60111d9dd73d7b4f3c547282994546f (Correct)
PHP: 091da5cf4ffd853e58f5b4f0a07902219ce7ac9647801af5b3e8f755d63b71b4
I need encrypt with PHP that give me same with JavaScript.
You must use aes-256-cbc as algorithm in the PHP code, because the key is 32 bytes large.
Also you have to apply a zero vector as IV in the PHP code, which you can create with:
$iv = hex2bin('00000000000000000000000000000000');
This way, the PHP code provides the same ciphertext as the JavaScript code.
Note that a static IV is insecure. The correct way is to generate a random (non-secret) IV for each encryption and pass this IV along with the ciphertext to the decrypting side (typically concatenated).