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new enc key implementation

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This commit is contained in:
Kyle Spearrin 2017-05-31 22:47:19 -04:00
parent aa1ed52f64
commit 2fa7b532b1
10 changed files with 84 additions and 84 deletions
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6
src/App/Abstractions/Services/ICryptoService.cs
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@ -8,11 +8,10 @@ namespace Bit.App.Abstractions
public interface ICryptoService
{
SymmetricCryptoKey Key { get; set; }
SymmetricCryptoKey PreviousKey { get; }
bool KeyChanged { get; }
SymmetricCryptoKey EncKey { get; }
byte[] PrivateKey { get; }
IDictionary<string, SymmetricCryptoKey> OrgKeys { get; }
void SetEncKey(CipherString encKeyEnc);
void SetPrivateKey(CipherString privateKeyEnc);
void SetOrgKeys(ProfileResponse profile);
void SetOrgKeys(Dictionary<string, string> orgKeysEncDict);
@ -26,5 +25,6 @@ namespace Bit.App.Abstractions
string MakeKeyFromPasswordBase64(string password, string salt);
byte[] HashPassword(SymmetricCryptoKey key, string password);
string HashPasswordBase64(SymmetricCryptoKey key, string password);
CipherString MakeEncKey(SymmetricCryptoKey key);
}
}

1
src/App/Models/Api/Request/RegisterRequest.cs
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@ -6,5 +6,6 @@
public string Email { get; set; }
public string MasterPasswordHash { get; set; }
public string MasterPasswordHint { get; set; }
public string Key { get; set; }
}
}

2
src/App/Models/Api/Response/ProfileResponse.cs
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@ -10,6 +10,8 @@ namespace Bit.App.Models.Api
public string MasterPasswordHint { get; set; }
public string Culture { get; set; }
public bool TwoFactorEnabled { get; set; }
public string Key { get; set; }
public string PrivateKey { get; set; }
public IEnumerable<ProfileOrganizationResponseModel> Organizations { get; set; }
}
}

1
src/App/Models/Api/Response/TokenResponse.cs
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@ -15,5 +15,6 @@ namespace Bit.App.Models.Api
public string TokenType { get; set; }
public List<int> TwoFactorProviders { get; set; }
public string PrivateKey { get; set; }
public string Key { get; set; }
}
}

7
src/App/Models/CipherString.cs
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@ -83,18 +83,13 @@ namespace Bit.App.Models
}
EncryptionType = encryptionType;
EncryptedString = string.Format("{0}|{1}", initializationVector, cipherText);
EncryptedString = string.Format("{0}.{1}|{2}", (byte)EncryptionType, initializationVector, cipherText);
if(!string.IsNullOrWhiteSpace(mac))
{
EncryptedString = string.Format("{0}|{1}", EncryptedString, mac);
}
if(EncryptionType != EncryptionType.AesCbc256_B64)
{
EncryptedString = string.Format("{0}.{1}", (byte)EncryptionType, EncryptedString);
}
CipherText = cipherText;
InitializationVector = initializationVector;
Mac = mac;

4
src/App/Pages/RegisterPage.cs
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@ -203,12 +203,14 @@ namespace Bit.App.Pages
var normalizedEmail = EmailCell.Entry.Text.ToLower();
var key = _cryptoService.MakeKeyFromPassword(PasswordCell.Entry.Text, normalizedEmail);
var encKey = _cryptoService.MakeEncKey(key);
var request = new RegisterRequest
{
Email = normalizedEmail,
MasterPasswordHash = _cryptoService.HashPasswordBase64(key, PasswordCell.Entry.Text),
MasterPasswordHint = !string.IsNullOrWhiteSpace(PasswordHintCell.Entry.Text)
? PasswordHintCell.Entry.Text : null
? PasswordHintCell.Entry.Text : null,
Key = encKey.EncryptedString
};
_userDialogs.ShowLoading(AppResources.CreatingAccount, MaskType.Black);

10
src/App/Pages/Vault/VaultListLoginsPage.cs
View File

@ -31,7 +31,6 @@ namespace Bit.App.Pages
private readonly ISettings _settings;
private readonly IGoogleAnalyticsService _googleAnalyticsService;
private readonly bool _favorites;
private bool _loadExistingData;
private CancellationTokenSource _filterResultsCancellationTokenSource;
public VaultListLoginsPage(bool favorites, string uri = null)
@ -50,7 +49,6 @@ namespace Bit.App.Pages
_googleAnalyticsService = Resolver.Resolve<IGoogleAnalyticsService>();
var cryptoService = Resolver.Resolve<ICryptoService>();
_loadExistingData = !_settings.GetValueOrDefault(Constants.FirstVaultLoad, true) || !cryptoService.KeyChanged;
Uri = uri;
@ -234,10 +232,7 @@ namespace Bit.App.Pages
Search.SearchButtonPressed += SearchBar_SearchButtonPressed;
AddLoginItem?.InitEvents();
if(_loadExistingData)
{
_filterResultsCancellationTokenSource = FetchAndLoadVault();
}
_filterResultsCancellationTokenSource = FetchAndLoadVault();
if(_connectivity.IsConnected && Device.RuntimePlatform == Device.iOS && !_favorites)
{
@ -307,9 +302,6 @@ namespace Bit.App.Pages
private CancellationTokenSource FetchAndLoadVault()
{
var cts = new CancellationTokenSource();
_settings.AddOrUpdateValue(Constants.FirstVaultLoad, false);
_loadExistingData = true;
if(PresentationFolders.Count > 0 && _syncService.SyncInProgress)
{
return cts;

7
src/App/Services/AuthService.cs
View File

@ -6,8 +6,6 @@ using Bit.App.Models.Api;
using Plugin.Settings.Abstractions;
using Bit.App.Models;
using System.Linq;
using System.Collections.Generic;
using System.Diagnostics;
namespace Bit.App.Services
{
@ -273,6 +271,11 @@ namespace Bit.App.Services
private async Task ProcessLoginSuccessAsync(SymmetricCryptoKey key, TokenResponse response)
{
if(response.Key != null)
{
_cryptoService.SetEncKey(new CipherString(response.PrivateKey));
}
if(response.PrivateKey != null)
{
_cryptoService.SetPrivateKey(new CipherString(response.PrivateKey));

102
src/App/Services/CryptoService.cs
View File

@ -16,8 +16,8 @@ namespace Bit.App.Services
public class CryptoService : ICryptoService
{
private const string KeyKey = "key";
private const string PreviousKeyKey = "previousKey";
private const string PrivateKeyKey = "encPrivateKey";
private const string EncKeyKey = "encKey";
private const string OrgKeysKey = "encOrgKeys";
private const int InitializationVectorSize = 16;
@ -25,6 +25,7 @@ namespace Bit.App.Services
private readonly ISecureStorageService _secureStorage;
private readonly IKeyDerivationService _keyDerivationService;
private SymmetricCryptoKey _key;
private SymmetricCryptoKey _encKey;
private SymmetricCryptoKey _legacyEtmKey;
private SymmetricCryptoKey _previousKey;
private IDictionary<string, SymmetricCryptoKey> _orgKeys;
@ -63,7 +64,6 @@ namespace Bit.App.Services
}
else
{
PreviousKey = _key;
_secureStorage.Delete(KeyKey);
}
@ -72,46 +72,27 @@ namespace Bit.App.Services
}
}
public SymmetricCryptoKey PreviousKey
public SymmetricCryptoKey EncKey
{
get
{
if(_previousKey == null && _secureStorage.Contains(PreviousKeyKey))
if(_encKey == null && _settings.Contains(EncKeyKey))
{
var keyBytes = _secureStorage.Retrieve(PreviousKeyKey);
if(keyBytes != null)
var encKey = _settings.GetValueOrDefault<string>(EncKeyKey);
var encKeyCs = new CipherString(encKey);
try
{
_previousKey = new SymmetricCryptoKey(keyBytes);
var decBytes = DecryptToBytes(encKeyCs, Key);
_encKey = new SymmetricCryptoKey(decBytes);
}
catch
{
_encKey = null;
Debug.WriteLine($"Cannot set enc key. Decryption failed.");
}
}
return _previousKey;
}
private set
{
if(value != null)
{
_secureStorage.Store(PreviousKeyKey, value.Key);
_previousKey = value;
}
}
}
public bool KeyChanged
{
get
{
if(Key == null)
{
return false;
}
if(PreviousKey == null)
{
return Key != null;
}
return !PreviousKey.Key.SequenceEqual(Key.Key);
return _encKey;
}
}
@ -169,6 +150,20 @@ namespace Bit.App.Services
}
}
public void SetEncKey(CipherString encKeyEnc)
{
if(encKeyEnc != null)
{
_settings.AddOrUpdateValue(EncKeyKey, encKeyEnc.EncryptedString);
}
else if(_settings.Contains(EncKeyKey))
{
_settings.Remove(EncKeyKey);
}
_encKey = null;
}
public void SetPrivateKey(CipherString privateKeyEnc)
{
if(privateKeyEnc != null)
@ -178,12 +173,9 @@ namespace Bit.App.Services
else if(_settings.Contains(PrivateKeyKey))
{
_settings.Remove(PrivateKeyKey);
_privateKey = null;
}
else
{
_privateKey = null;
}
_privateKey = null;
}
public void SetOrgKeys(ProfileResponse profile)
@ -234,13 +226,25 @@ namespace Bit.App.Services
SetOrgKeys((Dictionary<string, string>)null);
Key = null;
SetPrivateKey(null);
SetEncKey(null);
}
public CipherString Encrypt(string plaintextValue, SymmetricCryptoKey key = null)
{
if(plaintextValue == null)
{
throw new ArgumentNullException(nameof(plaintextValue));
}
var plaintextBytes = Encoding.UTF8.GetBytes(plaintextValue);
return Encrypt(plaintextBytes, key);
}
public CipherString Encrypt(byte[] plainBytes, SymmetricCryptoKey key = null)
{
if(key == null)
{
key = Key;
key = EncKey ?? Key;
}
if(key == null)
@ -248,17 +252,15 @@ namespace Bit.App.Services
throw new ArgumentNullException(nameof(key));
}
if(plaintextValue == null)
if(plainBytes == null)
{
throw new ArgumentNullException(nameof(plaintextValue));
throw new ArgumentNullException(nameof(plainBytes));
}
var plaintextBytes = Encoding.UTF8.GetBytes(plaintextValue);
var provider = WinRTCrypto.SymmetricKeyAlgorithmProvider.OpenAlgorithm(SymmetricAlgorithm.AesCbcPkcs7);
var cryptoKey = provider.CreateSymmetricKey(key.EncKey);
var iv = WinRTCrypto.CryptographicBuffer.GenerateRandom(provider.BlockLength);
var encryptedBytes = WinRTCrypto.CryptographicEngine.Encrypt(cryptoKey, plaintextBytes, iv);
var encryptedBytes = WinRTCrypto.CryptographicEngine.Encrypt(cryptoKey, plainBytes, iv);
var mac = key.MacKey != null ? ComputeMacBase64(encryptedBytes, iv, key.MacKey) : null;
return new CipherString(key.EncryptionType, Convert.ToBase64String(iv),
@ -283,7 +285,7 @@ namespace Bit.App.Services
{
if(key == null)
{
key = Key;
key = EncKey ?? Key;
}
if(key == null)
@ -448,7 +450,7 @@ namespace Bit.App.Services
{
if(key == null)
{
throw new ArgumentNullException(nameof(Key));
throw new ArgumentNullException(nameof(key));
}
if(password == null)
@ -466,5 +468,11 @@ namespace Bit.App.Services
var hash = HashPassword(key, password);
return Convert.ToBase64String(hash);
}
public CipherString MakeEncKey(SymmetricCryptoKey key)
{
var bytes = WinRTCrypto.CryptographicBuffer.GenerateRandom(512 / 8);
return Encrypt(bytes, key);
}
}
}

28
src/App/Services/SyncService.cs
View File

@ -9,7 +9,6 @@ using System.Collections.Generic;
using Xamarin.Forms;
using Newtonsoft.Json;
using Bit.App.Models;
using System.Diagnostics;
namespace Bit.App.Services
{
@ -203,7 +202,7 @@ namespace Bit.App.Services
return false;
}
await SyncOrgKeysAsync(profile.Result);
await SyncProfileKeysAsync(profile.Result);
SyncCompleted(true);
return true;
@ -258,11 +257,11 @@ namespace Bit.App.Services
var loginTask = SyncLoginsAsync(loginsDict);
var folderTask = SyncFoldersAsync(foldersDict);
var domainsTask = SyncDomainsAsync(domains.Result);
var orgKeysTask = SyncOrgKeysAsync(profile.Result);
await Task.WhenAll(loginTask, folderTask, domainsTask, orgKeysTask).ConfigureAwait(false);
var profileTask = SyncProfileKeysAsync(profile.Result);
await Task.WhenAll(loginTask, folderTask, domainsTask, profileTask).ConfigureAwait(false);
if(folderTask.Exception != null || loginTask.Exception != null || domainsTask.Exception != null ||
orgKeysTask.Exception != null)
profileTask.Exception != null)
{
SyncCompleted(false);
return false;
@ -397,23 +396,20 @@ namespace Bit.App.Services
catch(SQLite.SQLiteException) { }
}
private async Task SyncOrgKeysAsync(ProfileResponse profile)
private Task SyncProfileKeysAsync(ProfileResponse profile)
{
if(_cryptoService.PrivateKey == null && (profile.Organizations?.Any() ?? false))
if(!string.IsNullOrWhiteSpace(profile.Key))
{
var keys = await _accountsApiRepository.GetKeys();
if(!CheckSuccess(keys))
{
return;
}
_cryptoService.SetEncKey(new CipherString(profile.Key));
}
if(!string.IsNullOrWhiteSpace(keys.Result.PrivateKey))
{
_cryptoService.SetPrivateKey(new CipherString(keys.Result.PrivateKey));
}
if(!string.IsNullOrWhiteSpace(profile.PrivateKey))
{
_cryptoService.SetPrivateKey(new CipherString(profile.PrivateKey));
}
_cryptoService.SetOrgKeys(profile);
return Task.FromResult(0);
}
private void SyncStarted()