e68d957777
Deleting wifi certificates isn't supported yet since cascading the removal back into wifi configs will need some easy way of enumerating wifi configs first. Bug: 29208062 Change-Id: I2d9d1ea7e0974701009bfa6ea162b8bc80806639
422 lines
16 KiB
Java
422 lines
16 KiB
Java
/*
|
|
* Copyright (C) 2015 The Android Open Source Project
|
|
*
|
|
* Licensed under the Apache License, Version 2.0 (the "License");
|
|
* you may not use this file except in compliance with the License.
|
|
* You may obtain a copy of the License at
|
|
*
|
|
* http://www.apache.org/licenses/LICENSE-2.0
|
|
*
|
|
* Unless required by applicable law or agreed to in writing, software
|
|
* distributed under the License is distributed on an "AS IS" BASIS,
|
|
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
|
|
* See the License for the specific language governing permissions and
|
|
* limitations under the License.
|
|
*/
|
|
|
|
package com.android.settings;
|
|
|
|
import android.annotation.LayoutRes;
|
|
import android.annotation.Nullable;
|
|
import android.app.AlertDialog;
|
|
import android.app.Dialog;
|
|
import android.app.DialogFragment;
|
|
import android.app.Fragment;
|
|
import android.content.Context;
|
|
import android.content.DialogInterface;
|
|
import android.os.AsyncTask;
|
|
import android.os.Bundle;
|
|
import android.os.Parcel;
|
|
import android.os.Parcelable;
|
|
import android.os.Process;
|
|
import android.os.RemoteException;
|
|
import android.os.UserHandle;
|
|
import android.os.UserManager;
|
|
import android.security.Credentials;
|
|
import android.security.IKeyChainService;
|
|
import android.security.KeyChain;
|
|
import android.security.KeyChain.KeyChainConnection;
|
|
import android.security.KeyStore;
|
|
import android.util.Log;
|
|
import android.util.SparseArray;
|
|
import android.view.LayoutInflater;
|
|
import android.view.View;
|
|
import android.view.ViewGroup;
|
|
import android.widget.AdapterView;
|
|
import android.widget.AdapterView.OnItemClickListener;
|
|
import android.widget.ArrayAdapter;
|
|
import android.widget.ListView;
|
|
import android.widget.TextView;
|
|
|
|
import com.android.internal.logging.MetricsProto.MetricsEvent;
|
|
import com.android.internal.widget.LockPatternUtils;
|
|
import com.android.settingslib.RestrictedLockUtils;
|
|
import com.android.settingslib.RestrictedLockUtils.EnforcedAdmin;
|
|
|
|
import java.util.ArrayList;
|
|
import java.util.EnumSet;
|
|
import java.util.List;
|
|
import java.util.SortedMap;
|
|
import java.util.TreeMap;
|
|
|
|
import static android.view.View.GONE;
|
|
import static android.view.View.VISIBLE;
|
|
|
|
public class UserCredentialsSettings extends OptionsMenuFragment implements OnItemClickListener {
|
|
private static final String TAG = "UserCredentialsSettings";
|
|
|
|
private ListView mListView;
|
|
|
|
@Override
|
|
protected int getMetricsCategory() {
|
|
return MetricsEvent.USER_CREDENTIALS;
|
|
}
|
|
|
|
@Override
|
|
public void onResume() {
|
|
super.onResume();
|
|
refreshItems();
|
|
}
|
|
|
|
@Override
|
|
public View onCreateView(
|
|
LayoutInflater inflater, ViewGroup parent, Bundle savedInstanceState) {
|
|
final View rootView = inflater.inflate(R.layout.user_credentials, parent, false);
|
|
|
|
// Set up an OnItemClickListener for the credential list.
|
|
mListView = (ListView) rootView.findViewById(R.id.credential_list);
|
|
mListView.setOnItemClickListener(this);
|
|
|
|
return rootView;
|
|
}
|
|
|
|
@Override
|
|
public void onItemClick(AdapterView<?> parent, View view, int position, long id) {
|
|
final Credential item = (Credential) parent.getItemAtPosition(position);
|
|
CredentialDialogFragment.show(this, item);
|
|
}
|
|
|
|
protected void announceRemoval(String alias) {
|
|
if (isAdded()) {
|
|
mListView.announceForAccessibility(getString(R.string.user_credential_removed, alias));
|
|
}
|
|
}
|
|
|
|
protected void refreshItems() {
|
|
if (isAdded()) {
|
|
new AliasLoader().execute();
|
|
}
|
|
}
|
|
|
|
public static class CredentialDialogFragment extends DialogFragment {
|
|
private static final String TAG = "CredentialDialogFragment";
|
|
private static final String ARG_CREDENTIAL = "credential";
|
|
|
|
public static void show(Fragment target, Credential item) {
|
|
final Bundle args = new Bundle();
|
|
args.putParcelable(ARG_CREDENTIAL, item);
|
|
|
|
if (target.getFragmentManager().findFragmentByTag(TAG) == null) {
|
|
final DialogFragment frag = new CredentialDialogFragment();
|
|
frag.setTargetFragment(target, /* requestCode */ -1);
|
|
frag.setArguments(args);
|
|
frag.show(target.getFragmentManager(), TAG);
|
|
}
|
|
}
|
|
|
|
@Override
|
|
public Dialog onCreateDialog(Bundle savedInstanceState) {
|
|
final Credential item = (Credential) getArguments().getParcelable(ARG_CREDENTIAL);
|
|
|
|
View root = getActivity().getLayoutInflater()
|
|
.inflate(R.layout.user_credential_dialog, null);
|
|
ViewGroup infoContainer = (ViewGroup) root.findViewById(R.id.credential_container);
|
|
View contentView = getCredentialView(item, R.layout.user_credential, null,
|
|
infoContainer, /* expanded */ true);
|
|
infoContainer.addView(contentView);
|
|
|
|
AlertDialog.Builder builder = new AlertDialog.Builder(getActivity())
|
|
.setView(root)
|
|
.setTitle(R.string.user_credential_title)
|
|
.setPositiveButton(R.string.done, null);
|
|
|
|
final String restriction = UserManager.DISALLOW_CONFIG_CREDENTIALS;
|
|
final int myUserId = UserHandle.myUserId();
|
|
if (!RestrictedLockUtils.hasBaseUserRestriction(getContext(), restriction, myUserId)) {
|
|
DialogInterface.OnClickListener listener = new DialogInterface.OnClickListener() {
|
|
@Override public void onClick(DialogInterface dialog, int id) {
|
|
final EnforcedAdmin admin = RestrictedLockUtils.checkIfRestrictionEnforced(
|
|
getContext(), restriction, myUserId);
|
|
if (admin != null) {
|
|
RestrictedLockUtils.sendShowAdminSupportDetailsIntent(getContext(),
|
|
admin);
|
|
} else {
|
|
new RemoveCredentialsTask(getContext(), getTargetFragment())
|
|
.execute(item);
|
|
}
|
|
dialog.dismiss();
|
|
}
|
|
};
|
|
if (item.isSystem()) {
|
|
// TODO: a safe means of clearing wifi certificates. Configs refer to aliases
|
|
// directly so deleting certs will break dependent access points.
|
|
builder.setNegativeButton(R.string.trusted_credentials_remove_label, listener);
|
|
}
|
|
}
|
|
return builder.create();
|
|
}
|
|
|
|
/**
|
|
* Deletes all certificates and keys under a given alias.
|
|
*
|
|
* If the {@link Credential} is for a system alias, all active grants to the alias will be
|
|
* removed using {@link KeyChain}.
|
|
*/
|
|
private class RemoveCredentialsTask extends AsyncTask<Credential, Void, Credential[]> {
|
|
private Context context;
|
|
private Fragment targetFragment;
|
|
|
|
public RemoveCredentialsTask(Context context, Fragment targetFragment) {
|
|
this.context = context;
|
|
this.targetFragment = targetFragment;
|
|
}
|
|
|
|
@Override
|
|
protected Credential[] doInBackground(Credential... credentials) {
|
|
for (final Credential credential : credentials) {
|
|
if (credential.isSystem()) {
|
|
removeGrantsAndDelete(credential);
|
|
continue;
|
|
}
|
|
throw new UnsupportedOperationException(
|
|
"Not implemented for wifi certificates. This should not be reachable.");
|
|
}
|
|
return credentials;
|
|
}
|
|
|
|
private void removeGrantsAndDelete(final Credential credential) {
|
|
final KeyChainConnection conn;
|
|
try {
|
|
conn = KeyChain.bind(getContext());
|
|
} catch (InterruptedException e) {
|
|
Log.w(TAG, "Connecting to KeyChain", e);
|
|
return;
|
|
}
|
|
|
|
try {
|
|
IKeyChainService keyChain = conn.getService();
|
|
keyChain.removeKeyPair(credential.alias);
|
|
} catch (RemoteException e) {
|
|
Log.w(TAG, "Removing credentials", e);
|
|
} finally {
|
|
conn.close();
|
|
}
|
|
}
|
|
|
|
@Override
|
|
protected void onPostExecute(Credential... credentials) {
|
|
if (targetFragment instanceof UserCredentialsSettings && targetFragment.isAdded()) {
|
|
final UserCredentialsSettings target = (UserCredentialsSettings) targetFragment;
|
|
for (final Credential credential : credentials) {
|
|
target.announceRemoval(credential.alias);
|
|
}
|
|
target.refreshItems();
|
|
}
|
|
}
|
|
}
|
|
}
|
|
|
|
/**
|
|
* Opens a background connection to KeyStore to list user credentials.
|
|
* The credentials are stored in a {@link CredentialAdapter} attached to the main
|
|
* {@link ListView} in the fragment.
|
|
*/
|
|
private class AliasLoader extends AsyncTask<Void, Void, List<Credential>> {
|
|
/**
|
|
* @return a list of credentials ordered:
|
|
* <ol>
|
|
* <li>first by purpose;</li>
|
|
* <li>then by alias.</li>
|
|
* </ol>
|
|
*/
|
|
@Override
|
|
protected List<Credential> doInBackground(Void... params) {
|
|
final KeyStore keyStore = KeyStore.getInstance();
|
|
|
|
// Certificates can be installed into SYSTEM_UID or WIFI_UID through CertInstaller.
|
|
final int myUserId = UserHandle.myUserId();
|
|
final int systemUid = UserHandle.getUid(myUserId, Process.SYSTEM_UID);
|
|
final int wifiUid = UserHandle.getUid(myUserId, Process.WIFI_UID);
|
|
|
|
List<Credential> credentials = new ArrayList<>();
|
|
credentials.addAll(getCredentialsForUid(keyStore, systemUid).values());
|
|
credentials.addAll(getCredentialsForUid(keyStore, wifiUid).values());
|
|
return credentials;
|
|
}
|
|
|
|
private SortedMap<String, Credential> getCredentialsForUid(KeyStore keyStore, int uid) {
|
|
final SortedMap<String, Credential> aliasMap = new TreeMap<>();
|
|
for (final Credential.Type type : Credential.Type.values()) {
|
|
for (final String alias : keyStore.list(type.prefix, uid)) {
|
|
// Do not show work profile keys in user credentials
|
|
if (alias.startsWith(LockPatternUtils.PROFILE_KEY_NAME_ENCRYPT) ||
|
|
alias.startsWith(LockPatternUtils.PROFILE_KEY_NAME_DECRYPT)) {
|
|
continue;
|
|
}
|
|
Credential c = aliasMap.get(alias);
|
|
if (c == null) {
|
|
c = new Credential(alias, uid);
|
|
aliasMap.put(alias, c);
|
|
}
|
|
c.storedTypes.add(type);
|
|
}
|
|
}
|
|
return aliasMap;
|
|
}
|
|
|
|
@Override
|
|
protected void onPostExecute(List<Credential> credentials) {
|
|
final Credential[] credentialArray = credentials.toArray(new Credential[0]);
|
|
mListView.setAdapter(new CredentialAdapter(getContext(), credentialArray));
|
|
}
|
|
}
|
|
|
|
/**
|
|
* Helper class to display {@link Credential}s in a list.
|
|
*/
|
|
private static class CredentialAdapter extends ArrayAdapter<Credential> {
|
|
private static final int LAYOUT_RESOURCE = R.layout.user_credential_preference;
|
|
|
|
public CredentialAdapter(Context context, final Credential[] objects) {
|
|
super(context, LAYOUT_RESOURCE, objects);
|
|
}
|
|
|
|
@Override
|
|
public View getView(int position, @Nullable View view, ViewGroup parent) {
|
|
return getCredentialView(getItem(position), LAYOUT_RESOURCE, view, parent,
|
|
/* expanded */ false);
|
|
}
|
|
}
|
|
|
|
/**
|
|
* Mapping from View IDs in {@link R} to the types of credentials they describe.
|
|
*/
|
|
private static final SparseArray<Credential.Type> credentialViewTypes = new SparseArray<>();
|
|
static {
|
|
credentialViewTypes.put(R.id.contents_userkey, Credential.Type.USER_PRIVATE_KEY);
|
|
credentialViewTypes.put(R.id.contents_usercrt, Credential.Type.USER_CERTIFICATE);
|
|
credentialViewTypes.put(R.id.contents_cacrt, Credential.Type.CA_CERTIFICATE);
|
|
}
|
|
|
|
protected static View getCredentialView(Credential item, @LayoutRes int layoutResource,
|
|
@Nullable View view, ViewGroup parent, boolean expanded) {
|
|
if (view == null) {
|
|
view = LayoutInflater.from(parent.getContext()).inflate(layoutResource, parent, false);
|
|
}
|
|
|
|
((TextView) view.findViewById(R.id.alias)).setText(item.alias);
|
|
((TextView) view.findViewById(R.id.purpose)).setText(item.isSystem()
|
|
? R.string.credential_for_vpn_and_apps
|
|
: R.string.credential_for_wifi);
|
|
|
|
view.findViewById(R.id.contents).setVisibility(expanded ? View.VISIBLE : View.GONE);
|
|
if (expanded) {
|
|
for (int i = 0; i < credentialViewTypes.size(); i++) {
|
|
final View detail = view.findViewById(credentialViewTypes.keyAt(i));
|
|
detail.setVisibility(item.storedTypes.contains(credentialViewTypes.valueAt(i))
|
|
? View.VISIBLE : View.GONE);
|
|
}
|
|
}
|
|
return view;
|
|
}
|
|
|
|
static class AliasEntry {
|
|
public String alias;
|
|
public int uid;
|
|
}
|
|
|
|
static class Credential implements Parcelable {
|
|
static enum Type {
|
|
CA_CERTIFICATE (Credentials.CA_CERTIFICATE),
|
|
USER_CERTIFICATE (Credentials.USER_CERTIFICATE),
|
|
USER_PRIVATE_KEY (Credentials.USER_PRIVATE_KEY),
|
|
USER_SECRET_KEY (Credentials.USER_SECRET_KEY);
|
|
|
|
final String prefix;
|
|
|
|
Type(String prefix) {
|
|
this.prefix = prefix;
|
|
}
|
|
}
|
|
|
|
/**
|
|
* Main part of the credential's alias. To fetch an item from KeyStore, prepend one of the
|
|
* prefixes from {@link CredentialItem.storedTypes}.
|
|
*/
|
|
final String alias;
|
|
|
|
/**
|
|
* UID under which this credential is stored. Typically {@link Process#SYSTEM_UID} but can
|
|
* also be {@link Process#WIFI_UID} for credentials installed as wifi certificates.
|
|
*/
|
|
final int uid;
|
|
|
|
/**
|
|
* Should contain some non-empty subset of:
|
|
* <ul>
|
|
* <li>{@link Credentials.CA_CERTIFICATE}</li>
|
|
* <li>{@link Credentials.USER_CERTIFICATE}</li>
|
|
* <li>{@link Credentials.USER_PRIVATE_KEY}</li>
|
|
* <li>{@link Credentials.USER_SECRET_KEY}</li>
|
|
* </ul>
|
|
*/
|
|
final EnumSet<Type> storedTypes = EnumSet.noneOf(Type.class);
|
|
|
|
Credential(final String alias, final int uid) {
|
|
this.alias = alias;
|
|
this.uid = uid;
|
|
}
|
|
|
|
Credential(Parcel in) {
|
|
this(in.readString(), in.readInt());
|
|
|
|
long typeBits = in.readLong();
|
|
for (Type i : Type.values()) {
|
|
if ((typeBits & (1L << i.ordinal())) != 0L) {
|
|
storedTypes.add(i);
|
|
}
|
|
}
|
|
}
|
|
|
|
public void writeToParcel(Parcel out, int flags) {
|
|
out.writeString(alias);
|
|
out.writeInt(uid);
|
|
|
|
long typeBits = 0;
|
|
for (Type i : storedTypes) {
|
|
typeBits |= 1L << i.ordinal();
|
|
}
|
|
out.writeLong(typeBits);
|
|
}
|
|
|
|
public int describeContents() {
|
|
return 0;
|
|
}
|
|
|
|
public static final Parcelable.Creator<Credential> CREATOR
|
|
= new Parcelable.Creator<Credential>() {
|
|
public Credential createFromParcel(Parcel in) {
|
|
return new Credential(in);
|
|
}
|
|
|
|
public Credential[] newArray(int size) {
|
|
return new Credential[size];
|
|
}
|
|
};
|
|
|
|
public boolean isSystem() {
|
|
return UserHandle.getAppId(uid) == Process.SYSTEM_UID;
|
|
}
|
|
}
|
|
}
|