How to get compatible encryption version in flutter as in iOS - ios

Question

I am working on iOS and flutter application together. There is encryption of data happening on both the sides. Below is the iOS encryption code which is already live,
func encryption(encryptionKey: String) -> String{
if(self.isEmpty){
return ""
}else{
let key = encryptionKey
let dataBytes : [UInt8] = Array(self.utf8)
let keyBytes : [UInt8] = Array(key.utf8)
do {
let encryptedData = try AES(key: keyBytes, blockMode: ECB(), padding: .pkcs7).encrypt(dataBytes)
let encodedString = Data(encryptedData).base64EncodedString()
return encodedString
} catch let error {
print(error)
return ""
}
}
Below is the flutter encryption code that I am working on now (Using encrypt.dart package),
final key = Key.fromBase64("Some_Key");
final iv = IV.fromLength(16));
final encrypter = Encrypter(AES(key, mode: AESMode.ecb, padding: 'PKCS7'));
final encrypted = encrypter.encrypt(someString, iv: iv); //IV is ignored in ECB mode
The issue here is the encrypted string that I am getting in flutter must be the same as iOS which is not the case. Could someone help me out in getting a compatible encryption version in flutter? Kindly help...

Answer 1

I finally resolved it myself. Posting the answer over here hoping it helps someone.
I had to change the below line,
from
final key = Key.fromBase64("Some_Key");
to
final key = Key.fromUtf8("Some_Key");
That't it. It works!!