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Add decryption of credential encrypted fields; refactored config;

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This commit is contained in:
mitchell 2019-07-08 22:03:44 -04:00
parent 910bdeae12
commit 27215e6596
60 changed files with 370 additions and 151 deletions
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29
lib/utils/crypto.dart
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@ -1,11 +1,18 @@
import 'dart:math';
import 'dart:convert';
import 'dart:typed_data';
import 'package:crypt/crypt.dart';
import 'package:encrypt/encrypt.dart';
import 'package:password_hash/password_hash.dart';
String hashPassword(String password) {
const saltSize = 16;
const saltIntMax = 256;
final random = Random.secure();
final saltInts = List<int>.generate(16, (_) => random.nextInt(256));
final saltInts =
List<int>.generate(saltSize, (_) => random.nextInt(saltIntMax));
final salt = base64.encode(saltInts);
return Crypt.sha256(password, salt: salt).toString();
@ -13,3 +20,23 @@ String hashPassword(String password) {
bool matchHashedPassword(String hashedPassword, String password) =>
Crypt(hashedPassword).match(password);
String decryptPassword(String masterpass, privateKey, ciphertext) {
final key =
PBKDF2().generateKey(masterpass, privateKey, pbkdf2Rounds, keySize);
var cipherbytes = base64.decode(ciphertext);
final iv =
IV(Uint8List.fromList(cipherbytes.getRange(0, aesBlockSize).toList()));
cipherbytes = Uint8List.fromList(
cipherbytes.getRange(aesBlockSize, cipherbytes.length).toList());
final encrypter = Encrypter(AES(Key(key), mode: AESMode.cbc));
return encrypter.decrypt(Encrypted(cipherbytes), iv: iv);
}
const pbkdf2Rounds = 4096;
const keySize = 32;
const aesBlockSize = 16;