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Fix for missing biometric integrity check in iOS extensions under certain conditions (#1162)

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* Fix for biometric check in extension on fresh install

* make sure bio integrity values are written to pref storage

* integrity state migration to pref storage

* remove automatic state saving upon null validation
This commit is contained in:
Matt Portune 2020-12-01 15:30:23 -05:00 committed by GitHub
parent e27370cf32
commit ffd8f9951f
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GPG Key ID: 4AEE18F83AFDEB23
8 changed files with 64 additions and 20 deletions
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6
src/App/Resources/AppResources.Designer.cs generated
View File

@ -2943,6 +2943,12 @@ namespace Bit.App.Resources {
}
}
public static string BiometricInvalidatedExtension {
get {
return ResourceManager.GetString("BiometricInvalidatedExtension", resourceCulture);
}
}
public static string EnableSyncOnRefresh {
get {
return ResourceManager.GetString("EnableSyncOnRefresh", resourceCulture);

5
src/App/Resources/AppResources.resx
View File

@ -1675,7 +1675,10 @@
<comment>Confirmation alert message when soft-deleting a cipher.</comment>
</data>
<data name="BiometricInvalidated" xml:space="preserve">
<value>Biometric change detected, login using Master Password to enable again.</value>
<value>Biometric unlock disabled pending verification of master password.</value>
</data>
<data name="BiometricInvalidatedExtension" xml:space="preserve">
<value>Biometric unlock for autofill disabled pending verification of master password.</value>
</data>
<data name="EnableSyncOnRefresh" xml:space="preserve">
<value>Enable sync on refresh</value>

3
src/App/Services/MobileStorageService.cs
View File

@ -32,8 +32,11 @@ namespace Bit.App.Services
Constants.MigratedFromV1AutofillPromptShown,
Constants.TriedV1Resync,
Constants.ClearCiphersCacheKey,
Constants.BiometricIntegrityKey,
Constants.iOSAutoFillClearCiphersCacheKey,
Constants.iOSAutoFillBiometricIntegrityKey,
Constants.iOSExtensionClearCiphersCacheKey,
Constants.iOSExtensionBiometricIntegrityKey,
Constants.EnvironmentUrlsKey,
Constants.InlineAutofillEnabledKey,
};

3
src/Core/Constants.cs
View File

@ -29,8 +29,11 @@
public static string OldUserIdKey = "userId";
public static string AddSitePromptShownKey = "addSitePromptShown";
public static string ClearCiphersCacheKey = "clearCiphersCache";
public static string BiometricIntegrityKey = "biometricIntegrityState";
public static string iOSAutoFillClearCiphersCacheKey = "iOSAutoFillClearCiphersCache";
public static string iOSAutoFillBiometricIntegrityKey = "iOSAutoFillBiometricIntegrityState";
public static string iOSExtensionClearCiphersCacheKey = "iOSExtensionClearCiphersCache";
public static string iOSExtensionBiometricIntegrityKey = "iOSExtensionBiometricIntegrityState";
public static string MigratedFromV1 = "migratedFromV1";
public static string MigratedFromV1AutofillPromptShown = "migratedV1AutofillPromptShown";
public static string TriedV1Resync = "triedV1Resync";

2
src/iOS.Autofill/LockPasswordViewController.cs
View File

@ -8,7 +8,7 @@ namespace Bit.iOS.Autofill
public LockPasswordViewController(IntPtr handle)
: base(handle)
{
BiometricIntegrityKey = "autofillBiometricState";
BiometricIntegrityKey = Bit.Core.Constants.iOSAutoFillBiometricIntegrityKey;
DismissModalAction = Cancel;
}

6
src/iOS.Core/Controllers/LockPasswordViewController.cs
View File

@ -59,6 +59,8 @@ namespace Bit.iOS.Core.Controllers
_pinLock = (_pinSet.Item1 && _vaultTimeoutService.PinProtectedKey != null) || _pinSet.Item2;
_biometricLock = _vaultTimeoutService.IsBiometricLockSetAsync().GetAwaiter().GetResult() &&
_cryptoService.HasKeyAsync().GetAwaiter().GetResult();
_biometricIntegrityValid = _biometricService.ValidateIntegrityAsync(BiometricIntegrityKey).GetAwaiter()
.GetResult();
BaseNavItem.Title = _pinLock ? AppResources.VerifyPIN : AppResources.VerifyMasterPassword;
BaseCancelButton.Title = AppResources.Cancel;
@ -88,8 +90,6 @@ namespace Bit.iOS.Core.Controllers
if (_biometricLock)
{
_biometricIntegrityValid = _biometricService.ValidateIntegrityAsync(BiometricIntegrityKey).GetAwaiter()
.GetResult();
if (!_biometricIntegrityValid)
{
return;
@ -293,7 +293,7 @@ namespace Bit.iOS.Core.Controllers
cell.TextLabel.Font = ThemeHelpers.GetDangerFont();
cell.TextLabel.Lines = 0;
cell.TextLabel.LineBreakMode = UILineBreakMode.WordWrap;
cell.TextLabel.Text = AppResources.BiometricInvalidated;
cell.TextLabel.Text = AppResources.BiometricInvalidatedExtension;
}
return cell;
}

57
src/iOS.Core/Services/BiometricService.cs
View File

@ -18,7 +18,7 @@ namespace Bit.iOS.Core.Services
{
if (bioIntegrityKey == null)
{
bioIntegrityKey = "biometricState";
bioIntegrityKey = Bit.Core.Constants.BiometricIntegrityKey;
}
var state = GetState();
if (state != null)
@ -31,28 +31,27 @@ namespace Bit.iOS.Core.Services
public async Task<bool> ValidateIntegrityAsync(string bioIntegrityKey = null)
{
var state = GetState();
if (state == null)
{
// Fallback for devices unable to retrieve state
return true;
}
if (bioIntegrityKey == null)
{
bioIntegrityKey = "biometricState";
bioIntegrityKey = Bit.Core.Constants.BiometricIntegrityKey;
}
var oldState = await _storageService.GetAsync<string>(bioIntegrityKey);
if (oldState == null)
{
// Fallback for upgraded devices
await SetupBiometricAsync(bioIntegrityKey);
return true;
oldState = await GetMigratedIntegrityState(bioIntegrityKey);
}
else
if (oldState != null)
{
var state = GetState();
if (state != null)
{
return FromBase64(oldState).Equals(state);
}
return true;
return FromBase64(oldState).Equals(state);
}
return false;
}
private NSData GetState()
@ -73,5 +72,35 @@ namespace Bit.iOS.Core.Services
var bytes = System.Convert.FromBase64String(data);
return NSData.FromArray(bytes);
}
private async Task<string> GetMigratedIntegrityState(string bioIntegrityKey)
{
var legacyKey = "biometricState";
if (bioIntegrityKey == Bit.Core.Constants.iOSAutoFillBiometricIntegrityKey)
{
legacyKey = "autofillBiometricState";
}
else if (bioIntegrityKey == Bit.Core.Constants.iOSExtensionBiometricIntegrityKey)
{
legacyKey = "extensionBiometricState";
}
// Original values are pulled from DB since the legacy keys were never defined in _preferenceStorageKeys
var integrityState = await _storageService.GetAsync<string>(legacyKey);
if (integrityState != null)
{
// Save original value to pref storage with new key
await _storageService.SaveAsync(bioIntegrityKey, integrityState);
// Remove value from DB storage with legacy key
await _storageService.RemoveAsync(legacyKey);
// Return value as if it was always in pref storage
return integrityState;
}
// Return null since the state was never set
return null;
}
}
}

2
src/iOS.Extension/LockPasswordViewController.cs
View File

@ -9,7 +9,7 @@ namespace Bit.iOS.Extension
public LockPasswordViewController(IntPtr handle)
: base(handle)
{
BiometricIntegrityKey = "extensionBiometricState";
BiometricIntegrityKey = Bit.Core.Constants.iOSExtensionBiometricIntegrityKey;
DismissModalAction = Cancel;
}