Brian Carlstrom | 3e6251d | 2011-04-11 09:05:06 -0700 | [diff] [blame] | 1 | /* |
| 2 | * Copyright (C) 2011 The Android Open Source Project |
| 3 | * |
| 4 | * Licensed under the Apache License, Version 2.0 (the "License"); |
| 5 | * you may not use this file except in compliance with the License. |
| 6 | * You may obtain a copy of the License at |
| 7 | * |
| 8 | * http://www.apache.org/licenses/LICENSE-2.0 |
| 9 | * |
| 10 | * Unless required by applicable law or agreed to in writing, software |
| 11 | * distributed under the License is distributed on an "AS IS" BASIS, |
| 12 | * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. |
| 13 | * See the License for the specific language governing permissions and |
| 14 | * limitations under the License. |
| 15 | */ |
| 16 | |
| 17 | package com.android.keychain; |
| 18 | |
Chad Brubaker | 2099a7d | 2016-05-02 13:13:23 -0700 | [diff] [blame] | 19 | import android.app.BroadcastOptions; |
Fred Quintana | fb2e18e | 2011-07-13 14:54:05 -0700 | [diff] [blame] | 20 | import android.app.IntentService; |
| 21 | import android.content.ContentValues; |
Brian Carlstrom | 3e6251d | 2011-04-11 09:05:06 -0700 | [diff] [blame] | 22 | import android.content.Context; |
| 23 | import android.content.Intent; |
Fred Quintana | fb2e18e | 2011-07-13 14:54:05 -0700 | [diff] [blame] | 24 | import android.content.pm.PackageManager; |
Robin Lee | 7e9d045 | 2017-02-20 20:57:41 +0000 | [diff] [blame] | 25 | import android.content.pm.StringParceledListSlice; |
Fred Quintana | fb2e18e | 2011-07-13 14:54:05 -0700 | [diff] [blame] | 26 | import android.database.Cursor; |
| 27 | import android.database.DatabaseUtils; |
| 28 | import android.database.sqlite.SQLiteDatabase; |
| 29 | import android.database.sqlite.SQLiteOpenHelper; |
Kenny Root | 6f1f03b | 2012-03-08 10:30:39 -0800 | [diff] [blame] | 30 | import android.os.Binder; |
Chad Brubaker | 2099a7d | 2016-05-02 13:13:23 -0700 | [diff] [blame] | 31 | import android.os.Build; |
Brian Carlstrom | 3e6251d | 2011-04-11 09:05:06 -0700 | [diff] [blame] | 32 | import android.os.IBinder; |
Kenny Root | 6f1f03b | 2012-03-08 10:30:39 -0800 | [diff] [blame] | 33 | import android.os.Process; |
Robin Lee | 93772c3 | 2014-09-02 14:53:50 +0100 | [diff] [blame] | 34 | import android.os.UserHandle; |
Brian Carlstrom | 3e6251d | 2011-04-11 09:05:06 -0700 | [diff] [blame] | 35 | import android.security.Credentials; |
| 36 | import android.security.IKeyChainService; |
Selim Gurun | 39e36e5 | 2012-02-14 10:50:42 -0800 | [diff] [blame] | 37 | import android.security.KeyChain; |
Brian Carlstrom | 3e6251d | 2011-04-11 09:05:06 -0700 | [diff] [blame] | 38 | import android.security.KeyStore; |
| 39 | import android.util.Log; |
| 40 | import java.io.ByteArrayInputStream; |
Brian Carlstrom | a58db54 | 2011-05-11 23:02:20 -0700 | [diff] [blame] | 41 | import java.io.IOException; |
Brian Carlstrom | 3e6251d | 2011-04-11 09:05:06 -0700 | [diff] [blame] | 42 | import java.security.cert.CertificateException; |
Zoltan Szatmary-Ban | 3d25b31 | 2014-08-18 10:54:19 +0100 | [diff] [blame] | 43 | import java.security.cert.CertificateEncodingException; |
Brian Carlstrom | 3e6251d | 2011-04-11 09:05:06 -0700 | [diff] [blame] | 44 | import java.security.cert.CertificateFactory; |
| 45 | import java.security.cert.X509Certificate; |
Zoltan Szatmary-Ban | 3d25b31 | 2014-08-18 10:54:19 +0100 | [diff] [blame] | 46 | import java.util.Set; |
| 47 | import java.util.List; |
| 48 | import java.util.ArrayList; |
| 49 | import java.util.Collections; |
Fred Quintana | fb2e18e | 2011-07-13 14:54:05 -0700 | [diff] [blame] | 50 | |
Kenny Root | 3048b6c | 2013-04-23 22:38:11 -0700 | [diff] [blame] | 51 | import com.android.org.conscrypt.TrustedCertificateStore; |
Brian Carlstrom | 3e6251d | 2011-04-11 09:05:06 -0700 | [diff] [blame] | 52 | |
Fred Quintana | fb2e18e | 2011-07-13 14:54:05 -0700 | [diff] [blame] | 53 | public class KeyChainService extends IntentService { |
Selim Gurun | 39e36e5 | 2012-02-14 10:50:42 -0800 | [diff] [blame] | 54 | |
Fred Quintana | fb2e18e | 2011-07-13 14:54:05 -0700 | [diff] [blame] | 55 | private static final String TAG = "KeyChain"; |
Brian Carlstrom | 3e6251d | 2011-04-11 09:05:06 -0700 | [diff] [blame] | 56 | |
Fred Quintana | fb2e18e | 2011-07-13 14:54:05 -0700 | [diff] [blame] | 57 | private static final String DATABASE_NAME = "grants.db"; |
| 58 | private static final int DATABASE_VERSION = 1; |
| 59 | private static final String TABLE_GRANTS = "grants"; |
| 60 | private static final String GRANTS_ALIAS = "alias"; |
| 61 | private static final String GRANTS_GRANTEE_UID = "uid"; |
Brian Carlstrom | 3e6251d | 2011-04-11 09:05:06 -0700 | [diff] [blame] | 62 | |
Fred Quintana | fb2e18e | 2011-07-13 14:54:05 -0700 | [diff] [blame] | 63 | /** created in onCreate(), closed in onDestroy() */ |
| 64 | public DatabaseHelper mDatabaseHelper; |
Brian Carlstrom | 3e6251d | 2011-04-11 09:05:06 -0700 | [diff] [blame] | 65 | |
Fred Quintana | fb2e18e | 2011-07-13 14:54:05 -0700 | [diff] [blame] | 66 | private static final String SELECTION_COUNT_OF_MATCHING_GRANTS = |
| 67 | "SELECT COUNT(*) FROM " + TABLE_GRANTS |
| 68 | + " WHERE " + GRANTS_GRANTEE_UID + "=? AND " + GRANTS_ALIAS + "=?"; |
| 69 | |
| 70 | private static final String SELECT_GRANTS_BY_UID_AND_ALIAS = |
| 71 | GRANTS_GRANTEE_UID + "=? AND " + GRANTS_ALIAS + "=?"; |
| 72 | |
| 73 | private static final String SELECTION_GRANTS_BY_UID = GRANTS_GRANTEE_UID + "=?"; |
| 74 | |
Robin Lee | ba755b1 | 2016-02-24 15:27:43 +0000 | [diff] [blame] | 75 | private static final String SELECTION_GRANTS_BY_ALIAS = GRANTS_ALIAS + "=?"; |
| 76 | |
Fred Quintana | fb2e18e | 2011-07-13 14:54:05 -0700 | [diff] [blame] | 77 | public KeyChainService() { |
| 78 | super(KeyChainService.class.getSimpleName()); |
| 79 | } |
Brian Carlstrom | 3e6251d | 2011-04-11 09:05:06 -0700 | [diff] [blame] | 80 | |
| 81 | @Override public void onCreate() { |
| 82 | super.onCreate(); |
Fred Quintana | fb2e18e | 2011-07-13 14:54:05 -0700 | [diff] [blame] | 83 | mDatabaseHelper = new DatabaseHelper(this); |
| 84 | } |
| 85 | |
| 86 | @Override |
| 87 | public void onDestroy() { |
| 88 | super.onDestroy(); |
| 89 | mDatabaseHelper.close(); |
| 90 | mDatabaseHelper = null; |
Brian Carlstrom | 3e6251d | 2011-04-11 09:05:06 -0700 | [diff] [blame] | 91 | } |
| 92 | |
| 93 | private final IKeyChainService.Stub mIKeyChainService = new IKeyChainService.Stub() { |
Brian Carlstrom | 3e6251d | 2011-04-11 09:05:06 -0700 | [diff] [blame] | 94 | private final KeyStore mKeyStore = KeyStore.getInstance(); |
Brian Carlstrom | a58db54 | 2011-05-11 23:02:20 -0700 | [diff] [blame] | 95 | private final TrustedCertificateStore mTrustedCertificateStore |
| 96 | = new TrustedCertificateStore(); |
Brian Carlstrom | 3e6251d | 2011-04-11 09:05:06 -0700 | [diff] [blame] | 97 | |
Kenny Root | 6f1f03b | 2012-03-08 10:30:39 -0800 | [diff] [blame] | 98 | @Override |
| 99 | public String requestPrivateKey(String alias) { |
| 100 | checkArgs(alias); |
| 101 | |
| 102 | final String keystoreAlias = Credentials.USER_PRIVATE_KEY + alias; |
| 103 | final int uid = Binder.getCallingUid(); |
Janis Danisevskis | c394aea | 2017-06-07 10:20:45 -0700 | [diff] [blame^] | 104 | return mKeyStore.grant(keystoreAlias, uid); |
Brian Carlstrom | 3e6251d | 2011-04-11 09:05:06 -0700 | [diff] [blame] | 105 | } |
| 106 | |
Fred Quintana | fb2e18e | 2011-07-13 14:54:05 -0700 | [diff] [blame] | 107 | @Override public byte[] getCertificate(String alias) { |
Kenny Root | 6f1f03b | 2012-03-08 10:30:39 -0800 | [diff] [blame] | 108 | checkArgs(alias); |
| 109 | return mKeyStore.get(Credentials.USER_CERTIFICATE + alias); |
Brian Carlstrom | 3e6251d | 2011-04-11 09:05:06 -0700 | [diff] [blame] | 110 | } |
| 111 | |
Rubin Xu | 8714f06 | 2016-03-23 12:37:10 +0000 | [diff] [blame] | 112 | @Override public byte[] getCaCertificates(String alias) { |
| 113 | checkArgs(alias); |
| 114 | return mKeyStore.get(Credentials.CA_CERTIFICATE + alias); |
| 115 | } |
| 116 | |
Kenny Root | 6f1f03b | 2012-03-08 10:30:39 -0800 | [diff] [blame] | 117 | private void checkArgs(String alias) { |
Brian Carlstrom | 3e6251d | 2011-04-11 09:05:06 -0700 | [diff] [blame] | 118 | if (alias == null) { |
| 119 | throw new NullPointerException("alias == null"); |
| 120 | } |
Kenny Root | 4ff2296 | 2013-02-14 10:17:06 -0800 | [diff] [blame] | 121 | if (!mKeyStore.isUnlocked()) { |
Nick Kralevich | c8b0463 | 2012-05-21 15:13:07 -0700 | [diff] [blame] | 122 | throw new IllegalStateException("keystore is " |
| 123 | + mKeyStore.state().toString()); |
Brian Carlstrom | 3e6251d | 2011-04-11 09:05:06 -0700 | [diff] [blame] | 124 | } |
Nick Kralevich | c8b0463 | 2012-05-21 15:13:07 -0700 | [diff] [blame] | 125 | |
Fred Quintana | fb2e18e | 2011-07-13 14:54:05 -0700 | [diff] [blame] | 126 | final int callingUid = getCallingUid(); |
| 127 | if (!hasGrantInternal(mDatabaseHelper.getReadableDatabase(), callingUid, alias)) { |
| 128 | throw new IllegalStateException("uid " + callingUid |
| 129 | + " doesn't have permission to access the requested alias"); |
Brian Carlstrom | 3e6251d | 2011-04-11 09:05:06 -0700 | [diff] [blame] | 130 | } |
Brian Carlstrom | 3e6251d | 2011-04-11 09:05:06 -0700 | [diff] [blame] | 131 | } |
| 132 | |
Bartosz Fabianowski | 9bacf2b | 2017-02-10 02:26:45 +0100 | [diff] [blame] | 133 | @Override public String installCaCertificate(byte[] caCertificate) { |
Brian Carlstrom | 43f5b77 | 2011-06-27 02:27:16 -0700 | [diff] [blame] | 134 | checkCertInstallerOrSystemCaller(); |
Bartosz Fabianowski | 9bacf2b | 2017-02-10 02:26:45 +0100 | [diff] [blame] | 135 | final String alias; |
Brian Carlstrom | a58db54 | 2011-05-11 23:02:20 -0700 | [diff] [blame] | 136 | try { |
Bartosz Fabianowski | 9bacf2b | 2017-02-10 02:26:45 +0100 | [diff] [blame] | 137 | final X509Certificate cert = parseCertificate(caCertificate); |
Brian Carlstrom | a58db54 | 2011-05-11 23:02:20 -0700 | [diff] [blame] | 138 | synchronized (mTrustedCertificateStore) { |
Bartosz Fabianowski | 9bacf2b | 2017-02-10 02:26:45 +0100 | [diff] [blame] | 139 | mTrustedCertificateStore.installCertificate(cert); |
| 140 | alias = mTrustedCertificateStore.getCertificateAlias(cert); |
Brian Carlstrom | a58db54 | 2011-05-11 23:02:20 -0700 | [diff] [blame] | 141 | } |
| 142 | } catch (IOException e) { |
| 143 | throw new IllegalStateException(e); |
| 144 | } catch (CertificateException e) { |
| 145 | throw new IllegalStateException(e); |
| 146 | } |
Chad Brubaker | 2099a7d | 2016-05-02 13:13:23 -0700 | [diff] [blame] | 147 | broadcastLegacyStorageChange(); |
| 148 | broadcastTrustStoreChange(); |
Bartosz Fabianowski | 9bacf2b | 2017-02-10 02:26:45 +0100 | [diff] [blame] | 149 | return alias; |
Brian Carlstrom | a58db54 | 2011-05-11 23:02:20 -0700 | [diff] [blame] | 150 | } |
Brian Carlstrom | 5aeadd9 | 2011-05-17 00:40:33 -0700 | [diff] [blame] | 151 | |
Rubin Xu | 8714f06 | 2016-03-23 12:37:10 +0000 | [diff] [blame] | 152 | /** |
| 153 | * Install a key pair to the keystore. |
| 154 | * |
| 155 | * @param privateKey The private key associated with the client certificate |
| 156 | * @param userCertificate The client certificate to be installed |
| 157 | * @param userCertificateChain The rest of the chain for the client certificate |
| 158 | * @param alias The alias under which the key pair is installed |
| 159 | * @return Whether the operation succeeded or not. |
| 160 | */ |
Bernhard Bauer | d300fc5 | 2014-07-21 15:32:30 +0100 | [diff] [blame] | 161 | @Override public boolean installKeyPair(byte[] privateKey, byte[] userCertificate, |
Rubin Xu | 8714f06 | 2016-03-23 12:37:10 +0000 | [diff] [blame] | 162 | byte[] userCertificateChain, String alias) { |
Bernhard Bauer | d300fc5 | 2014-07-21 15:32:30 +0100 | [diff] [blame] | 163 | checkCertInstallerOrSystemCaller(); |
Robin Lee | 8847b12 | 2015-07-27 12:50:28 +0100 | [diff] [blame] | 164 | if (!mKeyStore.isUnlocked()) { |
| 165 | Log.e(TAG, "Keystore is " + mKeyStore.state().toString() + ". Credentials cannot" |
| 166 | + " be installed until device is unlocked"); |
| 167 | return false; |
| 168 | } |
Robin Lee | ba755b1 | 2016-02-24 15:27:43 +0000 | [diff] [blame] | 169 | if (!removeKeyPair(alias)) { |
| 170 | return false; |
| 171 | } |
Bernhard Bauer | d300fc5 | 2014-07-21 15:32:30 +0100 | [diff] [blame] | 172 | if (!mKeyStore.importKey(Credentials.USER_PRIVATE_KEY + alias, privateKey, -1, |
| 173 | KeyStore.FLAG_ENCRYPTED)) { |
| 174 | Log.e(TAG, "Failed to import private key " + alias); |
| 175 | return false; |
| 176 | } |
| 177 | if (!mKeyStore.put(Credentials.USER_CERTIFICATE + alias, userCertificate, -1, |
| 178 | KeyStore.FLAG_ENCRYPTED)) { |
| 179 | Log.e(TAG, "Failed to import user certificate " + userCertificate); |
Alex Klyubin | 44c777b | 2015-06-08 09:46:15 -0700 | [diff] [blame] | 180 | if (!mKeyStore.delete(Credentials.USER_PRIVATE_KEY + alias)) { |
Bernhard Bauer | d300fc5 | 2014-07-21 15:32:30 +0100 | [diff] [blame] | 181 | Log.e(TAG, "Failed to delete private key after certificate importing failed"); |
| 182 | } |
| 183 | return false; |
| 184 | } |
Rubin Xu | 8714f06 | 2016-03-23 12:37:10 +0000 | [diff] [blame] | 185 | if (userCertificateChain != null && userCertificateChain.length > 0) { |
| 186 | if (!mKeyStore.put(Credentials.CA_CERTIFICATE + alias, userCertificateChain, -1, |
| 187 | KeyStore.FLAG_ENCRYPTED)) { |
| 188 | Log.e(TAG, "Failed to import certificate chain" + userCertificateChain); |
| 189 | if (!removeKeyPair(alias)) { |
| 190 | Log.e(TAG, "Failed to clean up key chain after certificate chain" |
| 191 | + " importing failed"); |
| 192 | } |
| 193 | return false; |
| 194 | } |
| 195 | } |
Chad Brubaker | 2099a7d | 2016-05-02 13:13:23 -0700 | [diff] [blame] | 196 | broadcastKeychainChange(); |
| 197 | broadcastLegacyStorageChange(); |
Bernhard Bauer | d300fc5 | 2014-07-21 15:32:30 +0100 | [diff] [blame] | 198 | return true; |
| 199 | } |
| 200 | |
Robin Lee | f44a519 | 2015-08-03 17:18:02 +0100 | [diff] [blame] | 201 | @Override public boolean removeKeyPair(String alias) { |
| 202 | checkCertInstallerOrSystemCaller(); |
Robin Lee | ba755b1 | 2016-02-24 15:27:43 +0000 | [diff] [blame] | 203 | if (!Credentials.deleteAllTypesForAlias(mKeyStore, alias)) { |
| 204 | return false; |
| 205 | } |
| 206 | removeGrantsForAlias(alias); |
Chad Brubaker | 2099a7d | 2016-05-02 13:13:23 -0700 | [diff] [blame] | 207 | broadcastKeychainChange(); |
| 208 | broadcastLegacyStorageChange(); |
Robin Lee | ba755b1 | 2016-02-24 15:27:43 +0000 | [diff] [blame] | 209 | return true; |
Robin Lee | f44a519 | 2015-08-03 17:18:02 +0100 | [diff] [blame] | 210 | } |
| 211 | |
Brian Carlstrom | 5aeadd9 | 2011-05-17 00:40:33 -0700 | [diff] [blame] | 212 | private X509Certificate parseCertificate(byte[] bytes) throws CertificateException { |
| 213 | CertificateFactory cf = CertificateFactory.getInstance("X.509"); |
| 214 | return (X509Certificate) cf.generateCertificate(new ByteArrayInputStream(bytes)); |
| 215 | } |
| 216 | |
Brian Carlstrom | a58db54 | 2011-05-11 23:02:20 -0700 | [diff] [blame] | 217 | @Override public boolean reset() { |
| 218 | // only Settings should be able to reset |
Brian Carlstrom | 43f5b77 | 2011-06-27 02:27:16 -0700 | [diff] [blame] | 219 | checkSystemCaller(); |
Fred Quintana | fb2e18e | 2011-07-13 14:54:05 -0700 | [diff] [blame] | 220 | removeAllGrants(mDatabaseHelper.getWritableDatabase()); |
Brian Carlstrom | a58db54 | 2011-05-11 23:02:20 -0700 | [diff] [blame] | 221 | boolean ok = true; |
Brian Carlstrom | a58db54 | 2011-05-11 23:02:20 -0700 | [diff] [blame] | 222 | synchronized (mTrustedCertificateStore) { |
| 223 | // delete user-installed CA certs |
| 224 | for (String alias : mTrustedCertificateStore.aliases()) { |
| 225 | if (TrustedCertificateStore.isUser(alias)) { |
Brian Carlstrom | 43f5b77 | 2011-06-27 02:27:16 -0700 | [diff] [blame] | 226 | if (!deleteCertificateEntry(alias)) { |
Brian Carlstrom | a58db54 | 2011-05-11 23:02:20 -0700 | [diff] [blame] | 227 | ok = false; |
| 228 | } |
| 229 | } |
| 230 | } |
Brian Carlstrom | a58db54 | 2011-05-11 23:02:20 -0700 | [diff] [blame] | 231 | } |
Chad Brubaker | 2099a7d | 2016-05-02 13:13:23 -0700 | [diff] [blame] | 232 | broadcastTrustStoreChange(); |
Chad Brubaker | 8df30b5 | 2017-03-10 13:02:48 -0800 | [diff] [blame] | 233 | broadcastKeychainChange(); |
Chad Brubaker | 2099a7d | 2016-05-02 13:13:23 -0700 | [diff] [blame] | 234 | broadcastLegacyStorageChange(); |
Selim Gurun | 39e36e5 | 2012-02-14 10:50:42 -0800 | [diff] [blame] | 235 | return ok; |
Brian Carlstrom | a58db54 | 2011-05-11 23:02:20 -0700 | [diff] [blame] | 236 | } |
Brian Carlstrom | 43f5b77 | 2011-06-27 02:27:16 -0700 | [diff] [blame] | 237 | |
| 238 | @Override public boolean deleteCaCertificate(String alias) { |
| 239 | // only Settings should be able to delete |
| 240 | checkSystemCaller(); |
Selim Gurun | 39e36e5 | 2012-02-14 10:50:42 -0800 | [diff] [blame] | 241 | boolean ok = true; |
| 242 | synchronized (mTrustedCertificateStore) { |
| 243 | ok = deleteCertificateEntry(alias); |
| 244 | } |
Chad Brubaker | 2099a7d | 2016-05-02 13:13:23 -0700 | [diff] [blame] | 245 | broadcastTrustStoreChange(); |
| 246 | broadcastLegacyStorageChange(); |
Selim Gurun | 39e36e5 | 2012-02-14 10:50:42 -0800 | [diff] [blame] | 247 | return ok; |
Brian Carlstrom | 43f5b77 | 2011-06-27 02:27:16 -0700 | [diff] [blame] | 248 | } |
| 249 | |
| 250 | private boolean deleteCertificateEntry(String alias) { |
| 251 | try { |
| 252 | mTrustedCertificateStore.deleteCertificateEntry(alias); |
| 253 | return true; |
| 254 | } catch (IOException e) { |
| 255 | Log.w(TAG, "Problem removing CA certificate " + alias, e); |
| 256 | return false; |
| 257 | } catch (CertificateException e) { |
| 258 | Log.w(TAG, "Problem removing CA certificate " + alias, e); |
| 259 | return false; |
| 260 | } |
| 261 | } |
| 262 | |
| 263 | private void checkCertInstallerOrSystemCaller() { |
| 264 | String actual = checkCaller("com.android.certinstaller"); |
| 265 | if (actual == null) { |
| 266 | return; |
| 267 | } |
| 268 | checkSystemCaller(); |
| 269 | } |
| 270 | private void checkSystemCaller() { |
| 271 | String actual = checkCaller("android.uid.system:1000"); |
| 272 | if (actual != null) { |
| 273 | throw new IllegalStateException(actual); |
| 274 | } |
| 275 | } |
| 276 | /** |
| 277 | * Returns null if actually caller is expected, otherwise return bad package to report |
| 278 | */ |
| 279 | private String checkCaller(String expectedPackage) { |
| 280 | String actualPackage = getPackageManager().getNameForUid(getCallingUid()); |
| 281 | return (!expectedPackage.equals(actualPackage)) ? actualPackage : null; |
| 282 | } |
Brian Carlstrom | 3e6251d | 2011-04-11 09:05:06 -0700 | [diff] [blame] | 283 | |
Fred Quintana | fb2e18e | 2011-07-13 14:54:05 -0700 | [diff] [blame] | 284 | @Override public boolean hasGrant(int uid, String alias) { |
| 285 | checkSystemCaller(); |
| 286 | return hasGrantInternal(mDatabaseHelper.getReadableDatabase(), uid, alias); |
Brian Carlstrom | 3e6251d | 2011-04-11 09:05:06 -0700 | [diff] [blame] | 287 | } |
| 288 | |
Fred Quintana | fb2e18e | 2011-07-13 14:54:05 -0700 | [diff] [blame] | 289 | @Override public void setGrant(int uid, String alias, boolean value) { |
| 290 | checkSystemCaller(); |
| 291 | setGrantInternal(mDatabaseHelper.getWritableDatabase(), uid, alias, value); |
Chad Brubaker | 2099a7d | 2016-05-02 13:13:23 -0700 | [diff] [blame] | 292 | broadcastPermissionChange(uid, alias, value); |
| 293 | broadcastLegacyStorageChange(); |
Brian Carlstrom | 3e6251d | 2011-04-11 09:05:06 -0700 | [diff] [blame] | 294 | } |
Zoltan Szatmary-Ban | 3d25b31 | 2014-08-18 10:54:19 +0100 | [diff] [blame] | 295 | |
Zoltan Szatmary-Ban | 3d25b31 | 2014-08-18 10:54:19 +0100 | [diff] [blame] | 296 | @Override |
Robin Lee | 7e9d045 | 2017-02-20 20:57:41 +0000 | [diff] [blame] | 297 | public StringParceledListSlice getUserCaAliases() { |
Zoltan Szatmary-Ban | 3d25b31 | 2014-08-18 10:54:19 +0100 | [diff] [blame] | 298 | synchronized (mTrustedCertificateStore) { |
Robin Lee | 7e9d045 | 2017-02-20 20:57:41 +0000 | [diff] [blame] | 299 | return new StringParceledListSlice(new ArrayList<String>( |
| 300 | mTrustedCertificateStore.userAliases())); |
Zoltan Szatmary-Ban | 3d25b31 | 2014-08-18 10:54:19 +0100 | [diff] [blame] | 301 | } |
| 302 | } |
| 303 | |
| 304 | @Override |
Robin Lee | 7e9d045 | 2017-02-20 20:57:41 +0000 | [diff] [blame] | 305 | public StringParceledListSlice getSystemCaAliases() { |
Zoltan Szatmary-Ban | 3d25b31 | 2014-08-18 10:54:19 +0100 | [diff] [blame] | 306 | synchronized (mTrustedCertificateStore) { |
Robin Lee | 7e9d045 | 2017-02-20 20:57:41 +0000 | [diff] [blame] | 307 | return new StringParceledListSlice(new ArrayList<String>( |
| 308 | mTrustedCertificateStore.allSystemAliases())); |
Zoltan Szatmary-Ban | 3d25b31 | 2014-08-18 10:54:19 +0100 | [diff] [blame] | 309 | } |
| 310 | } |
| 311 | |
| 312 | @Override |
| 313 | public boolean containsCaAlias(String alias) { |
| 314 | return mTrustedCertificateStore.containsAlias(alias); |
| 315 | } |
| 316 | |
| 317 | @Override |
| 318 | public byte[] getEncodedCaCertificate(String alias, boolean includeDeletedSystem) { |
| 319 | synchronized (mTrustedCertificateStore) { |
| 320 | X509Certificate certificate = (X509Certificate) mTrustedCertificateStore |
| 321 | .getCertificate(alias, includeDeletedSystem); |
| 322 | if (certificate == null) { |
| 323 | Log.w(TAG, "Could not find CA certificate " + alias); |
| 324 | return null; |
| 325 | } |
| 326 | try { |
| 327 | return certificate.getEncoded(); |
| 328 | } catch (CertificateEncodingException e) { |
| 329 | Log.w(TAG, "Error while encoding CA certificate " + alias); |
| 330 | return null; |
| 331 | } |
| 332 | } |
| 333 | } |
| 334 | |
| 335 | @Override |
| 336 | public List<String> getCaCertificateChainAliases(String rootAlias, |
| 337 | boolean includeDeletedSystem) { |
| 338 | synchronized (mTrustedCertificateStore) { |
| 339 | X509Certificate root = (X509Certificate) mTrustedCertificateStore.getCertificate( |
| 340 | rootAlias, includeDeletedSystem); |
| 341 | try { |
| 342 | List<X509Certificate> chain = mTrustedCertificateStore.getCertificateChain( |
| 343 | root); |
| 344 | List<String> aliases = new ArrayList<String>(chain.size()); |
| 345 | final int n = chain.size(); |
| 346 | for (int i = 0; i < n; ++i) { |
| 347 | String alias = mTrustedCertificateStore.getCertificateAlias(chain.get(i), |
| 348 | true); |
| 349 | if (alias != null) { |
| 350 | aliases.add(alias); |
| 351 | } |
| 352 | } |
| 353 | return aliases; |
| 354 | } catch (CertificateException e) { |
| 355 | Log.w(TAG, "Error retrieving cert chain for root " + rootAlias); |
| 356 | return Collections.emptyList(); |
| 357 | } |
| 358 | } |
| 359 | } |
Brian Carlstrom | 3e6251d | 2011-04-11 09:05:06 -0700 | [diff] [blame] | 360 | }; |
| 361 | |
Fred Quintana | fb2e18e | 2011-07-13 14:54:05 -0700 | [diff] [blame] | 362 | private boolean hasGrantInternal(final SQLiteDatabase db, final int uid, final String alias) { |
| 363 | final long numMatches = DatabaseUtils.longForQuery(db, SELECTION_COUNT_OF_MATCHING_GRANTS, |
| 364 | new String[]{String.valueOf(uid), alias}); |
| 365 | return numMatches > 0; |
| 366 | } |
Brian Carlstrom | 3e6251d | 2011-04-11 09:05:06 -0700 | [diff] [blame] | 367 | |
Fred Quintana | fb2e18e | 2011-07-13 14:54:05 -0700 | [diff] [blame] | 368 | private void setGrantInternal(final SQLiteDatabase db, |
| 369 | final int uid, final String alias, final boolean value) { |
| 370 | if (value) { |
| 371 | if (!hasGrantInternal(db, uid, alias)) { |
| 372 | final ContentValues values = new ContentValues(); |
| 373 | values.put(GRANTS_ALIAS, alias); |
| 374 | values.put(GRANTS_GRANTEE_UID, uid); |
| 375 | db.insert(TABLE_GRANTS, GRANTS_ALIAS, values); |
| 376 | } |
| 377 | } else { |
| 378 | db.delete(TABLE_GRANTS, SELECT_GRANTS_BY_UID_AND_ALIAS, |
| 379 | new String[]{String.valueOf(uid), alias}); |
| 380 | } |
| 381 | } |
| 382 | |
Robin Lee | ba755b1 | 2016-02-24 15:27:43 +0000 | [diff] [blame] | 383 | private void removeGrantsForAlias(String alias) { |
| 384 | final SQLiteDatabase db = mDatabaseHelper.getWritableDatabase(); |
| 385 | db.delete(TABLE_GRANTS, SELECTION_GRANTS_BY_ALIAS, new String[] {alias}); |
| 386 | } |
| 387 | |
Fred Quintana | fb2e18e | 2011-07-13 14:54:05 -0700 | [diff] [blame] | 388 | private void removeAllGrants(final SQLiteDatabase db) { |
| 389 | db.delete(TABLE_GRANTS, null /* whereClause */, null /* whereArgs */); |
| 390 | } |
| 391 | |
| 392 | private class DatabaseHelper extends SQLiteOpenHelper { |
| 393 | public DatabaseHelper(Context context) { |
| 394 | super(context, DATABASE_NAME, null /* CursorFactory */, DATABASE_VERSION); |
| 395 | } |
| 396 | |
| 397 | @Override |
| 398 | public void onCreate(final SQLiteDatabase db) { |
| 399 | db.execSQL("CREATE TABLE " + TABLE_GRANTS + " ( " |
| 400 | + GRANTS_ALIAS + " STRING NOT NULL, " |
| 401 | + GRANTS_GRANTEE_UID + " INTEGER NOT NULL, " |
| 402 | + "UNIQUE (" + GRANTS_ALIAS + "," + GRANTS_GRANTEE_UID + "))"); |
| 403 | } |
| 404 | |
| 405 | @Override |
| 406 | public void onUpgrade(final SQLiteDatabase db, int oldVersion, final int newVersion) { |
| 407 | Log.e(TAG, "upgrade from version " + oldVersion + " to version " + newVersion); |
| 408 | |
| 409 | if (oldVersion == 1) { |
| 410 | // the first upgrade step goes here |
| 411 | oldVersion++; |
Brian Carlstrom | 3e6251d | 2011-04-11 09:05:06 -0700 | [diff] [blame] | 412 | } |
Brian Carlstrom | 7037b73 | 2011-06-30 15:04:49 -0700 | [diff] [blame] | 413 | } |
Fred Quintana | fb2e18e | 2011-07-13 14:54:05 -0700 | [diff] [blame] | 414 | } |
| 415 | |
| 416 | @Override public IBinder onBind(Intent intent) { |
Brian Carlstrom | 7037b73 | 2011-06-30 15:04:49 -0700 | [diff] [blame] | 417 | if (IKeyChainService.class.getName().equals(intent.getAction())) { |
Brian Carlstrom | 3e6251d | 2011-04-11 09:05:06 -0700 | [diff] [blame] | 418 | return mIKeyChainService; |
| 419 | } |
Brian Carlstrom | 3e6251d | 2011-04-11 09:05:06 -0700 | [diff] [blame] | 420 | return null; |
| 421 | } |
Fred Quintana | fb2e18e | 2011-07-13 14:54:05 -0700 | [diff] [blame] | 422 | |
| 423 | @Override |
| 424 | protected void onHandleIntent(final Intent intent) { |
| 425 | if (Intent.ACTION_PACKAGE_REMOVED.equals(intent.getAction())) { |
| 426 | purgeOldGrants(); |
| 427 | } |
| 428 | } |
| 429 | |
| 430 | private void purgeOldGrants() { |
| 431 | final PackageManager packageManager = getPackageManager(); |
| 432 | final SQLiteDatabase db = mDatabaseHelper.getWritableDatabase(); |
| 433 | Cursor cursor = null; |
| 434 | db.beginTransaction(); |
| 435 | try { |
| 436 | cursor = db.query(TABLE_GRANTS, |
| 437 | new String[]{GRANTS_GRANTEE_UID}, null, null, GRANTS_GRANTEE_UID, null, null); |
| 438 | while (cursor.moveToNext()) { |
| 439 | final int uid = cursor.getInt(0); |
| 440 | final boolean packageExists = packageManager.getPackagesForUid(uid) != null; |
| 441 | if (packageExists) { |
| 442 | continue; |
| 443 | } |
| 444 | Log.d(TAG, "deleting grants for UID " + uid |
| 445 | + " because its package is no longer installed"); |
| 446 | db.delete(TABLE_GRANTS, SELECTION_GRANTS_BY_UID, |
| 447 | new String[]{Integer.toString(uid)}); |
| 448 | } |
| 449 | db.setTransactionSuccessful(); |
| 450 | } finally { |
| 451 | if (cursor != null) { |
| 452 | cursor.close(); |
| 453 | } |
| 454 | db.endTransaction(); |
| 455 | } |
| 456 | } |
Selim Gurun | 39e36e5 | 2012-02-14 10:50:42 -0800 | [diff] [blame] | 457 | |
Chad Brubaker | 2099a7d | 2016-05-02 13:13:23 -0700 | [diff] [blame] | 458 | private void broadcastLegacyStorageChange() { |
Selim Gurun | 39e36e5 | 2012-02-14 10:50:42 -0800 | [diff] [blame] | 459 | Intent intent = new Intent(KeyChain.ACTION_STORAGE_CHANGED); |
Chad Brubaker | 2099a7d | 2016-05-02 13:13:23 -0700 | [diff] [blame] | 460 | BroadcastOptions opts = BroadcastOptions.makeBasic(); |
Chad Brubaker | 0402807 | 2016-07-08 10:48:54 -0700 | [diff] [blame] | 461 | opts.setMaxManifestReceiverApiLevel(Build.VERSION_CODES.N_MR1); |
Chad Brubaker | e5a5dd1 | 2016-07-25 14:34:54 -0700 | [diff] [blame] | 462 | sendBroadcastAsUser(intent, UserHandle.of(UserHandle.myUserId()), null, opts.toBundle()); |
Selim Gurun | 39e36e5 | 2012-02-14 10:50:42 -0800 | [diff] [blame] | 463 | } |
| 464 | |
Chad Brubaker | 2099a7d | 2016-05-02 13:13:23 -0700 | [diff] [blame] | 465 | private void broadcastKeychainChange() { |
| 466 | Intent intent = new Intent(KeyChain.ACTION_KEYCHAIN_CHANGED); |
Chad Brubaker | e5a5dd1 | 2016-07-25 14:34:54 -0700 | [diff] [blame] | 467 | sendBroadcastAsUser(intent, UserHandle.of(UserHandle.myUserId())); |
Chad Brubaker | 2099a7d | 2016-05-02 13:13:23 -0700 | [diff] [blame] | 468 | } |
| 469 | |
| 470 | private void broadcastTrustStoreChange() { |
| 471 | Intent intent = new Intent(KeyChain.ACTION_TRUST_STORE_CHANGED); |
Chad Brubaker | e5a5dd1 | 2016-07-25 14:34:54 -0700 | [diff] [blame] | 472 | sendBroadcastAsUser(intent, UserHandle.of(UserHandle.myUserId())); |
Chad Brubaker | 2099a7d | 2016-05-02 13:13:23 -0700 | [diff] [blame] | 473 | } |
| 474 | |
| 475 | private void broadcastPermissionChange(int uid, String alias, boolean access) { |
| 476 | // Since the permission change only impacts one uid only send to that uid's packages. |
| 477 | final PackageManager packageManager = getPackageManager(); |
| 478 | String[] packages = packageManager.getPackagesForUid(uid); |
| 479 | if (packages == null) { |
| 480 | return; |
| 481 | } |
| 482 | for (String pckg : packages) { |
| 483 | Intent intent = new Intent(KeyChain.ACTION_KEY_ACCESS_CHANGED); |
| 484 | intent.putExtra(KeyChain.EXTRA_KEY_ALIAS, alias); |
| 485 | intent.putExtra(KeyChain.EXTRA_KEY_ACCESSIBLE, access); |
| 486 | intent.setPackage(pckg); |
Chad Brubaker | e5a5dd1 | 2016-07-25 14:34:54 -0700 | [diff] [blame] | 487 | sendBroadcastAsUser(intent, UserHandle.of(UserHandle.myUserId())); |
Chad Brubaker | 2099a7d | 2016-05-02 13:13:23 -0700 | [diff] [blame] | 488 | } |
| 489 | } |
Brian Carlstrom | 3e6251d | 2011-04-11 09:05:06 -0700 | [diff] [blame] | 490 | } |