pbkdf2 static method
Implements PBKDF2 (Password-Based Key Derivation Function 2).
This is a simplified implementation for demonstration purposes. In a production environment, consider using a dedicated PBKDF2 library.
Implementation
static List<int> pbkdf2({
required List<int> bytes,
required List<int> salt,
required int iterations,
required int keyLength,
required Hash hashAlgorithm,
}) {
final hmac = Hmac(hashAlgorithm, bytes);
final blockCount = (keyLength / hashAlgorithm.blockSize).ceil();
final result = List<int>.filled(keyLength, 0);
for (var i = 1; i <= blockCount; i++) {
final block = _pbkdf2Block(hmac, salt, iterations, i);
final offset = (i - 1) * hashAlgorithm.blockSize;
final length = i == blockCount
? keyLength - (blockCount - 1) * hashAlgorithm.blockSize
: hashAlgorithm.blockSize;
for (var j = 0; j < length; j++) {
if (offset + j < result.length) {
result[offset + j] = block[j];
}
}
}
return result;
}