/// <summary>
/// Traverse AssistStructure and add ViewNode metadata to a flat list.
/// </summary>
/// <returns>The parse.</returns>
/// <param name="forFill">If set to <c>true</c> for fill.</param>
/// <param name="isManualRequest"></param>
string Parse(bool forFill, bool isManualRequest)
{
CommonUtil.logd("Parsing structure for " + Structure.ActivityComponent);
var nodes = Structure.WindowNodeCount;
ClientFormData = new FilledAutofillFieldCollection();
String webDomain = null;
_editTextsWithoutHint.Clear();
for (int i = 0; i < nodes; i++)
{
var node = Structure.GetWindowNodeAt(i);
var view = node.RootViewNode;
ParseLocked(forFill, isManualRequest, view, ref webDomain);
}
List <AssistStructure.ViewNode> passwordFields = new List <AssistStructure.ViewNode>();
List <AssistStructure.ViewNode> usernameFields = new List <AssistStructure.ViewNode>();
if (AutofillFields.Empty)
{
passwordFields = _editTextsWithoutHint.Where(IsPassword).ToList();
if (!passwordFields.Any())
{
passwordFields = _editTextsWithoutHint.Where(HasPasswordHint).ToList();
}
foreach (var passwordField in passwordFields)
{
var usernameField = _editTextsWithoutHint.TakeWhile(f => f.AutofillId != passwordField.AutofillId).LastOrDefault();
if (usernameField != null)
{
usernameFields.Add(usernameField);
}
}
//for some pages with two-step login, we don't see a password field and don't display the autofill for non-manual requests. But if the user forces autofill,
//let's assume it is a username field:
if (isManualRequest && !passwordFields.Any() && _editTextsWithoutHint.Count == 1)
{
usernameFields.Add(_editTextsWithoutHint.First());
}
}
//force focused fields to be included in autofill fields when request was triggered manually. This allows to fill fields which are "off" or don't have a hint (in case there are hints)
if (isManualRequest)
{
foreach (AssistStructure.ViewNode editText in _editTextsWithoutHint)
{
if (editText.IsFocused)
{
if (IsPassword(editText) || HasPasswordHint(editText))
{
passwordFields.Add(editText);
}
else
{
usernameFields.Add(editText);
}
break;
}
}
}
if (forFill)
{
foreach (var uf in usernameFields)
{
AutofillFields.Add(new AutofillFieldMetadata(uf, new[] { View.AutofillHintUsername }));
}
foreach (var pf in passwordFields)
{
AutofillFields.Add(new AutofillFieldMetadata(pf, new[] { View.AutofillHintPassword }));
}
}
else
{
foreach (var uf in usernameFields)
{
ClientFormData.Add(new FilledAutofillField(uf, new[] { View.AutofillHintUsername }));
}
foreach (var pf in passwordFields)
{
ClientFormData.Add(new FilledAutofillField(pf, new[] { View.AutofillHintPassword }));
}
}
String packageName = Structure.ActivityComponent.PackageName;
if (!string.IsNullOrEmpty(webDomain))
{
bool valid = Kp2aDigitalAssetLinksDataSource.Instance.IsValid(mContext, webDomain, packageName);
if (!valid)
{
CommonUtil.loge($"DAL verification failed for {packageName}/{webDomain}");
webDomain = null;
}
}
if (string.IsNullOrEmpty(webDomain))
{
webDomain = "androidapp://" + packageName;
CommonUtil.logd("no web domain. Using package name.");
}
return(webDomain);
}
void ParseLocked(bool forFill, bool isManualRequest, AssistStructure.ViewNode viewNode, ref string validWebdomain)
{
String webDomain = viewNode.WebDomain;
if (webDomain != null)
{
CommonUtil.logd($"child web domain: {webDomain}");
if (!string.IsNullOrEmpty(validWebdomain))
{
if (webDomain == validWebdomain)
{
throw new Java.Lang.SecurityException($"Found multiple web domains: valid= {validWebdomain}, child={webDomain}");
}
}
else
{
validWebdomain = webDomain;
}
}
string[] viewHints = viewNode.GetAutofillHints();
if (viewHints != null && viewHints.Length == 1 && viewHints.First() == "off" && viewNode.IsFocused &&
isManualRequest)
{
viewHints[0] = "on";
}
CommonUtil.logd("viewHints=" + viewHints);
CommonUtil.logd("class=" + viewNode.ClassName);
CommonUtil.logd("tag=" + (viewNode?.HtmlInfo?.Tag ?? "(null)"));
if (viewNode?.HtmlInfo?.Tag == "input")
{
foreach (var p in viewNode.HtmlInfo.Attributes)
{
CommonUtil.logd("attr=" + p.First + "/" + p.Second);
}
}
if (viewHints != null && viewHints.Length > 0 && viewHints.First() != "on" /*if hint is "on", treat as if there is no hint*/)
{
if (forFill)
{
AutofillFields.Add(new AutofillFieldMetadata(viewNode));
}
else
{
FilledAutofillField filledAutofillField = new FilledAutofillField(viewNode);
ClientFormData.Add(filledAutofillField);
}
}
else
{
if (viewNode.ClassName == "android.widget.EditText" || viewNode?.HtmlInfo?.Tag == "input")
{
_editTextsWithoutHint.Add(viewNode);
}
}
var childrenSize = viewNode.ChildCount;
if (childrenSize > 0)
{
for (int i = 0; i < childrenSize; i++)
{
ParseLocked(forFill, isManualRequest, viewNode.GetChildAt(i), ref validWebdomain);
}
}
}
public override void OnFillRequest(FillRequest request, CancellationSignal cancellationSignal, FillCallback callback)
{
bool isManual = (request.Flags & FillRequest.FlagManualRequest) != 0;
CommonUtil.logd("onFillRequest " + (isManual ? "manual" : "auto"));
var structure = request.FillContexts.Last().Structure;
if (_lockTime + _lockTimeout < DateTime.Now)
{
_lockTime = DateTime.Now;
//TODO support package signature verification as soon as this is supported in Keepass storage
var clientState = request.ClientState;
CommonUtil.logd("onFillRequest(): data=" + CommonUtil.BundleToString(clientState));
cancellationSignal.CancelEvent += (sender, e) =>
{
Kp2aLog.Log("Cancel autofill not implemented yet.");
_lockTime = DateTime.MinValue;
};
// Parse AutoFill data in Activity
StructureParser.AutofillTargetId query = null;
var parser = new StructureParser(this, structure);
try
{
query = parser.ParseForFill(isManual);
}
catch (Java.Lang.SecurityException e)
{
Log.Warn(CommonUtil.Tag, "Security exception handling request");
callback.OnFailure(e.Message);
return;
}
AutofillFieldMetadataCollection autofillFields = parser.AutofillFields;
var autofillIds = autofillFields.GetAutofillIds();
if (autofillIds.Length != 0 && CanAutofill(query, isManual))
{
var responseBuilder = new FillResponse.Builder();
bool hasEntryDataset = false;
if (query.IncompatiblePackageAndDomain == false)
{
Kp2aLog.Log("AF: (query.IncompatiblePackageAndDomain == false)");
//domain and package are compatible. Use Domain if available and package otherwise. Can fill without warning.
foreach (var entryDataset in BuildEntryDatasets(query.DomainOrPackage, query.WebDomain,
query.PackageName,
autofillIds, parser, DisplayWarning.None).Where(ds => ds != null)
)
{
Kp2aLog.Log("AF: Got EntryDataset " + (entryDataset == null));
responseBuilder.AddDataset(entryDataset);
hasEntryDataset = true;
}
}
{
if (query.WebDomain != null)
{
AddQueryDataset(query.WebDomain,
query.WebDomain, query.PackageName,
isManual, autofillIds, responseBuilder, !hasEntryDataset,
query.IncompatiblePackageAndDomain
? DisplayWarning.FillDomainInUntrustedApp
: DisplayWarning.None);
}
else
{
AddQueryDataset(query.PackageNameWithPseudoSchema,
query.WebDomain, query.PackageName,
isManual, autofillIds, responseBuilder, !hasEntryDataset, DisplayWarning.None);
}
}
AddDisableDataset(query.DomainOrPackage, autofillIds, responseBuilder, isManual);
if (PreferenceManager.GetDefaultSharedPreferences(this)
.GetBoolean(GetString(Resource.String.OfferSaveCredentials_key), true))
{
if (!CompatBrowsers.Contains(parser.PackageId))
{
responseBuilder.SetSaveInfo(new SaveInfo.Builder(parser.AutofillFields.SaveType,
parser.AutofillFields.GetAutofillIds()).Build());
}
}
Kp2aLog.Log("return autofill success");
callback.OnSuccess(responseBuilder.Build());
}
else
{
Kp2aLog.Log("cannot autofill");
callback.OnSuccess(null);
}
}
else
{
Kp2aLog.Log("Ignoring onFillRequest as there is another request going on.");
}
}
public override void OnDisconnected()
{
_lockTime = DateTime.MinValue;
CommonUtil.logd("onDisconnected");
}
public override void OnConnected()
{
CommonUtil.logd("onConnected");
}
public override void OnFillRequest(FillRequest request, CancellationSignal cancellationSignal, FillCallback callback)
{
bool isManual = (request.Flags & FillRequest.FlagManualRequest) != 0;
CommonUtil.logd("onFillRequest " + (isManual ? "manual" : "auto"));
var structure = request.FillContexts[request.FillContexts.Count - 1].Structure;
//TODO support package signature verification as soon as this is supported in Keepass storage
var clientState = request.ClientState;
CommonUtil.logd("onFillRequest(): data=" + CommonUtil.BundleToString(clientState));
cancellationSignal.CancelEvent += (sender, e) => {
Log.Warn(CommonUtil.Tag, "Cancel autofill not implemented yet.");
};
// Parse AutoFill data in Activity
string query = null;
var parser = new StructureParser(this, structure);
try
{
query = parser.ParseForFill(isManual);
}
catch (Java.Lang.SecurityException e)
{
Log.Warn(CommonUtil.Tag, "Security exception handling request");
callback.OnFailure(e.Message);
return;
}
AutofillFieldMetadataCollection autofillFields = parser.AutofillFields;
var autofillIds = autofillFields.GetAutofillIds();
if (autofillIds.Length != 0 && CanAutofill(query, isManual))
{
var responseBuilder = new FillResponse.Builder();
var entryDataset = AddEntryDataset(query, parser);
bool hasEntryDataset = entryDataset != null;
if (entryDataset != null)
{
responseBuilder.AddDataset(entryDataset);
}
AddQueryDataset(query, isManual, autofillIds, responseBuilder, !hasEntryDataset);
AddDisableDataset(query, autofillIds, responseBuilder, isManual);
if (PreferenceManager.GetDefaultSharedPreferences(this).GetBoolean(GetString(Resource.String.OfferSaveCredentials_key), true))
{
responseBuilder.SetSaveInfo(new SaveInfo.Builder(parser.AutofillFields.SaveType,
parser.AutofillFields.GetAutofillIds()).Build());
}
callback.OnSuccess(responseBuilder.Build());
}
else
{
callback.OnSuccess(null);
}
}
