CryptoJS AES-128-ECB和PHP openssl_encrypt不匹配

Question

I have some code on PHP, which can't be edited and a database full of encrypted this way messages.

$key = '297796CCB81D2553B07B379D78D87618'
return $encrypted = openssl_encrypt($data, 'AES-128-ECB', $key);

I have to write some JS code to encrypt and decrypt these messages. I'm using CryptoJS for this purpose.

const key = '297796CCB81D2553B07B379D78D87618'
let k = CryptoJS.enc.Base64.parse(key)
let cypher = CryptoJS.AES.encrypt(this.text, k, {mode: CryptoJS.mode.ECB})
this.cypher = CryptoJS.enc.Base64.stringify(cypher.ciphertext)

I can not get these codes to produce the same results. For 'test' string i got following results: JS: H1AG6j/i/iSqifSNCG5JKw==, PHP: Nqrur4UMEicEMwJC39qq0A==

I'm trying to work this out for 3 days, but I cannot find the issue. The only code I can edit is JS.

Answer 1

I figured out what problem is. openssl_encrypt in PHP takes the key as a UTF-8 string. After taking enough length, it ignores next characters, so our key: '297796CCB81D2553B07B379D78D87618' trims to '297796CCB81D2553'. This code is working:

// JS 
const key = '297796CCB81D2553'
let k = CryptoJS.enc.Utf8.parse(key)
let cypher = CryptoJS.AES.encrypt(this.text, k, {mode: CryptoJS.mode.ECB})
this.cypher = CryptoJS.enc.Base64.stringify(cypher.ciphertext)