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; |
Zoltan Szatmary-Ban | 3d25b31 | 2014-08-18 10:54:19 +0100 | [diff] [blame] | 25 | import android.content.pm.ParceledListSlice; |
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; |
Zoltan Szatmary-Ban | 3d25b31 | 2014-08-18 10:54:19 +0100 | [diff] [blame] | 40 | import com.android.internal.util.ParcelableString; |
Brian Carlstrom | 3e6251d | 2011-04-11 09:05:06 -0700 | [diff] [blame] | 41 | import java.io.ByteArrayInputStream; |
Brian Carlstrom | a58db54 | 2011-05-11 23:02:20 -0700 | [diff] [blame] | 42 | import java.io.IOException; |
Brian Carlstrom | 3e6251d | 2011-04-11 09:05:06 -0700 | [diff] [blame] | 43 | import java.security.cert.CertificateException; |
Zoltan Szatmary-Ban | 3d25b31 | 2014-08-18 10:54:19 +0100 | [diff] [blame] | 44 | import java.security.cert.CertificateEncodingException; |
Brian Carlstrom | 3e6251d | 2011-04-11 09:05:06 -0700 | [diff] [blame] | 45 | import java.security.cert.CertificateFactory; |
| 46 | import java.security.cert.X509Certificate; |
Zoltan Szatmary-Ban | 3d25b31 | 2014-08-18 10:54:19 +0100 | [diff] [blame] | 47 | import java.util.Set; |
| 48 | import java.util.List; |
| 49 | import java.util.ArrayList; |
| 50 | import java.util.Collections; |
Fred Quintana | fb2e18e | 2011-07-13 14:54:05 -0700 | [diff] [blame] | 51 | |
Kenny Root | 3048b6c | 2013-04-23 22:38:11 -0700 | [diff] [blame] | 52 | import com.android.org.conscrypt.TrustedCertificateStore; |
Brian Carlstrom | 3e6251d | 2011-04-11 09:05:06 -0700 | [diff] [blame] | 53 | |
Fred Quintana | fb2e18e | 2011-07-13 14:54:05 -0700 | [diff] [blame] | 54 | public class KeyChainService extends IntentService { |
Selim Gurun | 39e36e5 | 2012-02-14 10:50:42 -0800 | [diff] [blame] | 55 | |
Fred Quintana | fb2e18e | 2011-07-13 14:54:05 -0700 | [diff] [blame] | 56 | private static final String TAG = "KeyChain"; |
Brian Carlstrom | 3e6251d | 2011-04-11 09:05:06 -0700 | [diff] [blame] | 57 | |
Fred Quintana | fb2e18e | 2011-07-13 14:54:05 -0700 | [diff] [blame] | 58 | private static final String DATABASE_NAME = "grants.db"; |
| 59 | private static final int DATABASE_VERSION = 1; |
| 60 | private static final String TABLE_GRANTS = "grants"; |
| 61 | private static final String GRANTS_ALIAS = "alias"; |
| 62 | private static final String GRANTS_GRANTEE_UID = "uid"; |
Brian Carlstrom | 3e6251d | 2011-04-11 09:05:06 -0700 | [diff] [blame] | 63 | |
Fred Quintana | fb2e18e | 2011-07-13 14:54:05 -0700 | [diff] [blame] | 64 | /** created in onCreate(), closed in onDestroy() */ |
| 65 | public DatabaseHelper mDatabaseHelper; |
Brian Carlstrom | 3e6251d | 2011-04-11 09:05:06 -0700 | [diff] [blame] | 66 | |
Fred Quintana | fb2e18e | 2011-07-13 14:54:05 -0700 | [diff] [blame] | 67 | private static final String SELECTION_COUNT_OF_MATCHING_GRANTS = |
| 68 | "SELECT COUNT(*) FROM " + TABLE_GRANTS |
| 69 | + " WHERE " + GRANTS_GRANTEE_UID + "=? AND " + GRANTS_ALIAS + "=?"; |
| 70 | |
| 71 | private static final String SELECT_GRANTS_BY_UID_AND_ALIAS = |
| 72 | GRANTS_GRANTEE_UID + "=? AND " + GRANTS_ALIAS + "=?"; |
| 73 | |
| 74 | private static final String SELECTION_GRANTS_BY_UID = GRANTS_GRANTEE_UID + "=?"; |
| 75 | |
Robin Lee | ba755b1 | 2016-02-24 15:27:43 +0000 | [diff] [blame] | 76 | private static final String SELECTION_GRANTS_BY_ALIAS = GRANTS_ALIAS + "=?"; |
| 77 | |
Fred Quintana | fb2e18e | 2011-07-13 14:54:05 -0700 | [diff] [blame] | 78 | public KeyChainService() { |
| 79 | super(KeyChainService.class.getSimpleName()); |
| 80 | } |
Brian Carlstrom | 3e6251d | 2011-04-11 09:05:06 -0700 | [diff] [blame] | 81 | |
| 82 | @Override public void onCreate() { |
| 83 | super.onCreate(); |
Fred Quintana | fb2e18e | 2011-07-13 14:54:05 -0700 | [diff] [blame] | 84 | mDatabaseHelper = new DatabaseHelper(this); |
| 85 | } |
| 86 | |
| 87 | @Override |
| 88 | public void onDestroy() { |
| 89 | super.onDestroy(); |
| 90 | mDatabaseHelper.close(); |
| 91 | mDatabaseHelper = null; |
Brian Carlstrom | 3e6251d | 2011-04-11 09:05:06 -0700 | [diff] [blame] | 92 | } |
| 93 | |
| 94 | private final IKeyChainService.Stub mIKeyChainService = new IKeyChainService.Stub() { |
Brian Carlstrom | 3e6251d | 2011-04-11 09:05:06 -0700 | [diff] [blame] | 95 | private final KeyStore mKeyStore = KeyStore.getInstance(); |
Brian Carlstrom | a58db54 | 2011-05-11 23:02:20 -0700 | [diff] [blame] | 96 | private final TrustedCertificateStore mTrustedCertificateStore |
| 97 | = new TrustedCertificateStore(); |
Brian Carlstrom | 3e6251d | 2011-04-11 09:05:06 -0700 | [diff] [blame] | 98 | |
Kenny Root | 6f1f03b | 2012-03-08 10:30:39 -0800 | [diff] [blame] | 99 | @Override |
| 100 | public String requestPrivateKey(String alias) { |
| 101 | checkArgs(alias); |
| 102 | |
| 103 | final String keystoreAlias = Credentials.USER_PRIVATE_KEY + alias; |
| 104 | final int uid = Binder.getCallingUid(); |
| 105 | if (!mKeyStore.grant(keystoreAlias, uid)) { |
| 106 | return null; |
| 107 | } |
Robin Lee | 93772c3 | 2014-09-02 14:53:50 +0100 | [diff] [blame] | 108 | final int userHandle = UserHandle.getUserId(uid); |
| 109 | final int systemUidForUser = UserHandle.getUid(userHandle, Process.SYSTEM_UID); |
Kenny Root | 6f1f03b | 2012-03-08 10:30:39 -0800 | [diff] [blame] | 110 | |
| 111 | final StringBuilder sb = new StringBuilder(); |
Robin Lee | 93772c3 | 2014-09-02 14:53:50 +0100 | [diff] [blame] | 112 | sb.append(systemUidForUser); |
Kenny Root | 6f1f03b | 2012-03-08 10:30:39 -0800 | [diff] [blame] | 113 | sb.append('_'); |
| 114 | sb.append(keystoreAlias); |
| 115 | |
| 116 | return sb.toString(); |
Brian Carlstrom | 3e6251d | 2011-04-11 09:05:06 -0700 | [diff] [blame] | 117 | } |
| 118 | |
Fred Quintana | fb2e18e | 2011-07-13 14:54:05 -0700 | [diff] [blame] | 119 | @Override public byte[] getCertificate(String alias) { |
Kenny Root | 6f1f03b | 2012-03-08 10:30:39 -0800 | [diff] [blame] | 120 | checkArgs(alias); |
| 121 | return mKeyStore.get(Credentials.USER_CERTIFICATE + alias); |
Brian Carlstrom | 3e6251d | 2011-04-11 09:05:06 -0700 | [diff] [blame] | 122 | } |
| 123 | |
Rubin Xu | 8714f06 | 2016-03-23 12:37:10 +0000 | [diff] [blame] | 124 | @Override public byte[] getCaCertificates(String alias) { |
| 125 | checkArgs(alias); |
| 126 | return mKeyStore.get(Credentials.CA_CERTIFICATE + alias); |
| 127 | } |
| 128 | |
Kenny Root | 6f1f03b | 2012-03-08 10:30:39 -0800 | [diff] [blame] | 129 | private void checkArgs(String alias) { |
Brian Carlstrom | 3e6251d | 2011-04-11 09:05:06 -0700 | [diff] [blame] | 130 | if (alias == null) { |
| 131 | throw new NullPointerException("alias == null"); |
| 132 | } |
Kenny Root | 4ff2296 | 2013-02-14 10:17:06 -0800 | [diff] [blame] | 133 | if (!mKeyStore.isUnlocked()) { |
Nick Kralevich | c8b0463 | 2012-05-21 15:13:07 -0700 | [diff] [blame] | 134 | throw new IllegalStateException("keystore is " |
| 135 | + mKeyStore.state().toString()); |
Brian Carlstrom | 3e6251d | 2011-04-11 09:05:06 -0700 | [diff] [blame] | 136 | } |
Nick Kralevich | c8b0463 | 2012-05-21 15:13:07 -0700 | [diff] [blame] | 137 | |
Fred Quintana | fb2e18e | 2011-07-13 14:54:05 -0700 | [diff] [blame] | 138 | final int callingUid = getCallingUid(); |
| 139 | if (!hasGrantInternal(mDatabaseHelper.getReadableDatabase(), callingUid, alias)) { |
| 140 | throw new IllegalStateException("uid " + callingUid |
| 141 | + " doesn't have permission to access the requested alias"); |
Brian Carlstrom | 3e6251d | 2011-04-11 09:05:06 -0700 | [diff] [blame] | 142 | } |
Brian Carlstrom | 3e6251d | 2011-04-11 09:05:06 -0700 | [diff] [blame] | 143 | } |
| 144 | |
Brian Carlstrom | a58db54 | 2011-05-11 23:02:20 -0700 | [diff] [blame] | 145 | @Override public void installCaCertificate(byte[] caCertificate) { |
Brian Carlstrom | 43f5b77 | 2011-06-27 02:27:16 -0700 | [diff] [blame] | 146 | checkCertInstallerOrSystemCaller(); |
Brian Carlstrom | a58db54 | 2011-05-11 23:02:20 -0700 | [diff] [blame] | 147 | try { |
| 148 | synchronized (mTrustedCertificateStore) { |
| 149 | mTrustedCertificateStore.installCertificate(parseCertificate(caCertificate)); |
| 150 | } |
| 151 | } catch (IOException e) { |
| 152 | throw new IllegalStateException(e); |
| 153 | } catch (CertificateException e) { |
| 154 | throw new IllegalStateException(e); |
| 155 | } |
Chad Brubaker | 2099a7d | 2016-05-02 13:13:23 -0700 | [diff] [blame^] | 156 | broadcastLegacyStorageChange(); |
| 157 | broadcastTrustStoreChange(); |
Brian Carlstrom | a58db54 | 2011-05-11 23:02:20 -0700 | [diff] [blame] | 158 | } |
Brian Carlstrom | 5aeadd9 | 2011-05-17 00:40:33 -0700 | [diff] [blame] | 159 | |
Rubin Xu | 8714f06 | 2016-03-23 12:37:10 +0000 | [diff] [blame] | 160 | /** |
| 161 | * Install a key pair to the keystore. |
| 162 | * |
| 163 | * @param privateKey The private key associated with the client certificate |
| 164 | * @param userCertificate The client certificate to be installed |
| 165 | * @param userCertificateChain The rest of the chain for the client certificate |
| 166 | * @param alias The alias under which the key pair is installed |
| 167 | * @return Whether the operation succeeded or not. |
| 168 | */ |
Bernhard Bauer | d300fc5 | 2014-07-21 15:32:30 +0100 | [diff] [blame] | 169 | @Override public boolean installKeyPair(byte[] privateKey, byte[] userCertificate, |
Rubin Xu | 8714f06 | 2016-03-23 12:37:10 +0000 | [diff] [blame] | 170 | byte[] userCertificateChain, String alias) { |
Bernhard Bauer | d300fc5 | 2014-07-21 15:32:30 +0100 | [diff] [blame] | 171 | checkCertInstallerOrSystemCaller(); |
Robin Lee | 8847b12 | 2015-07-27 12:50:28 +0100 | [diff] [blame] | 172 | if (!mKeyStore.isUnlocked()) { |
| 173 | Log.e(TAG, "Keystore is " + mKeyStore.state().toString() + ". Credentials cannot" |
| 174 | + " be installed until device is unlocked"); |
| 175 | return false; |
| 176 | } |
Robin Lee | ba755b1 | 2016-02-24 15:27:43 +0000 | [diff] [blame] | 177 | if (!removeKeyPair(alias)) { |
| 178 | return false; |
| 179 | } |
Bernhard Bauer | d300fc5 | 2014-07-21 15:32:30 +0100 | [diff] [blame] | 180 | if (!mKeyStore.importKey(Credentials.USER_PRIVATE_KEY + alias, privateKey, -1, |
| 181 | KeyStore.FLAG_ENCRYPTED)) { |
| 182 | Log.e(TAG, "Failed to import private key " + alias); |
| 183 | return false; |
| 184 | } |
| 185 | if (!mKeyStore.put(Credentials.USER_CERTIFICATE + alias, userCertificate, -1, |
| 186 | KeyStore.FLAG_ENCRYPTED)) { |
| 187 | Log.e(TAG, "Failed to import user certificate " + userCertificate); |
Alex Klyubin | 44c777b | 2015-06-08 09:46:15 -0700 | [diff] [blame] | 188 | if (!mKeyStore.delete(Credentials.USER_PRIVATE_KEY + alias)) { |
Bernhard Bauer | d300fc5 | 2014-07-21 15:32:30 +0100 | [diff] [blame] | 189 | Log.e(TAG, "Failed to delete private key after certificate importing failed"); |
| 190 | } |
| 191 | return false; |
| 192 | } |
Rubin Xu | 8714f06 | 2016-03-23 12:37:10 +0000 | [diff] [blame] | 193 | if (userCertificateChain != null && userCertificateChain.length > 0) { |
| 194 | if (!mKeyStore.put(Credentials.CA_CERTIFICATE + alias, userCertificateChain, -1, |
| 195 | KeyStore.FLAG_ENCRYPTED)) { |
| 196 | Log.e(TAG, "Failed to import certificate chain" + userCertificateChain); |
| 197 | if (!removeKeyPair(alias)) { |
| 198 | Log.e(TAG, "Failed to clean up key chain after certificate chain" |
| 199 | + " importing failed"); |
| 200 | } |
| 201 | return false; |
| 202 | } |
| 203 | } |
Chad Brubaker | 2099a7d | 2016-05-02 13:13:23 -0700 | [diff] [blame^] | 204 | broadcastKeychainChange(); |
| 205 | broadcastLegacyStorageChange(); |
Bernhard Bauer | d300fc5 | 2014-07-21 15:32:30 +0100 | [diff] [blame] | 206 | return true; |
| 207 | } |
| 208 | |
Robin Lee | f44a519 | 2015-08-03 17:18:02 +0100 | [diff] [blame] | 209 | @Override public boolean removeKeyPair(String alias) { |
| 210 | checkCertInstallerOrSystemCaller(); |
Robin Lee | ba755b1 | 2016-02-24 15:27:43 +0000 | [diff] [blame] | 211 | if (!Credentials.deleteAllTypesForAlias(mKeyStore, alias)) { |
| 212 | return false; |
| 213 | } |
| 214 | removeGrantsForAlias(alias); |
Chad Brubaker | 2099a7d | 2016-05-02 13:13:23 -0700 | [diff] [blame^] | 215 | broadcastKeychainChange(); |
| 216 | broadcastLegacyStorageChange(); |
Robin Lee | ba755b1 | 2016-02-24 15:27:43 +0000 | [diff] [blame] | 217 | return true; |
Robin Lee | f44a519 | 2015-08-03 17:18:02 +0100 | [diff] [blame] | 218 | } |
| 219 | |
Brian Carlstrom | 5aeadd9 | 2011-05-17 00:40:33 -0700 | [diff] [blame] | 220 | private X509Certificate parseCertificate(byte[] bytes) throws CertificateException { |
| 221 | CertificateFactory cf = CertificateFactory.getInstance("X.509"); |
| 222 | return (X509Certificate) cf.generateCertificate(new ByteArrayInputStream(bytes)); |
| 223 | } |
| 224 | |
Brian Carlstrom | a58db54 | 2011-05-11 23:02:20 -0700 | [diff] [blame] | 225 | @Override public boolean reset() { |
| 226 | // only Settings should be able to reset |
Brian Carlstrom | 43f5b77 | 2011-06-27 02:27:16 -0700 | [diff] [blame] | 227 | checkSystemCaller(); |
Fred Quintana | fb2e18e | 2011-07-13 14:54:05 -0700 | [diff] [blame] | 228 | removeAllGrants(mDatabaseHelper.getWritableDatabase()); |
Brian Carlstrom | a58db54 | 2011-05-11 23:02:20 -0700 | [diff] [blame] | 229 | boolean ok = true; |
Brian Carlstrom | a58db54 | 2011-05-11 23:02:20 -0700 | [diff] [blame] | 230 | synchronized (mTrustedCertificateStore) { |
| 231 | // delete user-installed CA certs |
| 232 | for (String alias : mTrustedCertificateStore.aliases()) { |
| 233 | if (TrustedCertificateStore.isUser(alias)) { |
Brian Carlstrom | 43f5b77 | 2011-06-27 02:27:16 -0700 | [diff] [blame] | 234 | if (!deleteCertificateEntry(alias)) { |
Brian Carlstrom | a58db54 | 2011-05-11 23:02:20 -0700 | [diff] [blame] | 235 | ok = false; |
| 236 | } |
| 237 | } |
| 238 | } |
Brian Carlstrom | a58db54 | 2011-05-11 23:02:20 -0700 | [diff] [blame] | 239 | } |
Chad Brubaker | 2099a7d | 2016-05-02 13:13:23 -0700 | [diff] [blame^] | 240 | broadcastTrustStoreChange(); |
| 241 | broadcastLegacyStorageChange(); |
Selim Gurun | 39e36e5 | 2012-02-14 10:50:42 -0800 | [diff] [blame] | 242 | return ok; |
Brian Carlstrom | a58db54 | 2011-05-11 23:02:20 -0700 | [diff] [blame] | 243 | } |
Brian Carlstrom | 43f5b77 | 2011-06-27 02:27:16 -0700 | [diff] [blame] | 244 | |
| 245 | @Override public boolean deleteCaCertificate(String alias) { |
| 246 | // only Settings should be able to delete |
| 247 | checkSystemCaller(); |
Selim Gurun | 39e36e5 | 2012-02-14 10:50:42 -0800 | [diff] [blame] | 248 | boolean ok = true; |
| 249 | synchronized (mTrustedCertificateStore) { |
| 250 | ok = deleteCertificateEntry(alias); |
| 251 | } |
Chad Brubaker | 2099a7d | 2016-05-02 13:13:23 -0700 | [diff] [blame^] | 252 | broadcastTrustStoreChange(); |
| 253 | broadcastLegacyStorageChange(); |
Selim Gurun | 39e36e5 | 2012-02-14 10:50:42 -0800 | [diff] [blame] | 254 | return ok; |
Brian Carlstrom | 43f5b77 | 2011-06-27 02:27:16 -0700 | [diff] [blame] | 255 | } |
| 256 | |
| 257 | private boolean deleteCertificateEntry(String alias) { |
| 258 | try { |
| 259 | mTrustedCertificateStore.deleteCertificateEntry(alias); |
| 260 | return true; |
| 261 | } catch (IOException e) { |
| 262 | Log.w(TAG, "Problem removing CA certificate " + alias, e); |
| 263 | return false; |
| 264 | } catch (CertificateException e) { |
| 265 | Log.w(TAG, "Problem removing CA certificate " + alias, e); |
| 266 | return false; |
| 267 | } |
| 268 | } |
| 269 | |
| 270 | private void checkCertInstallerOrSystemCaller() { |
| 271 | String actual = checkCaller("com.android.certinstaller"); |
| 272 | if (actual == null) { |
| 273 | return; |
| 274 | } |
| 275 | checkSystemCaller(); |
| 276 | } |
| 277 | private void checkSystemCaller() { |
| 278 | String actual = checkCaller("android.uid.system:1000"); |
| 279 | if (actual != null) { |
| 280 | throw new IllegalStateException(actual); |
| 281 | } |
| 282 | } |
| 283 | /** |
| 284 | * Returns null if actually caller is expected, otherwise return bad package to report |
| 285 | */ |
| 286 | private String checkCaller(String expectedPackage) { |
| 287 | String actualPackage = getPackageManager().getNameForUid(getCallingUid()); |
| 288 | return (!expectedPackage.equals(actualPackage)) ? actualPackage : null; |
| 289 | } |
Brian Carlstrom | 3e6251d | 2011-04-11 09:05:06 -0700 | [diff] [blame] | 290 | |
Fred Quintana | fb2e18e | 2011-07-13 14:54:05 -0700 | [diff] [blame] | 291 | @Override public boolean hasGrant(int uid, String alias) { |
| 292 | checkSystemCaller(); |
| 293 | return hasGrantInternal(mDatabaseHelper.getReadableDatabase(), uid, alias); |
Brian Carlstrom | 3e6251d | 2011-04-11 09:05:06 -0700 | [diff] [blame] | 294 | } |
| 295 | |
Fred Quintana | fb2e18e | 2011-07-13 14:54:05 -0700 | [diff] [blame] | 296 | @Override public void setGrant(int uid, String alias, boolean value) { |
| 297 | checkSystemCaller(); |
| 298 | setGrantInternal(mDatabaseHelper.getWritableDatabase(), uid, alias, value); |
Chad Brubaker | 2099a7d | 2016-05-02 13:13:23 -0700 | [diff] [blame^] | 299 | broadcastPermissionChange(uid, alias, value); |
| 300 | broadcastLegacyStorageChange(); |
Brian Carlstrom | 3e6251d | 2011-04-11 09:05:06 -0700 | [diff] [blame] | 301 | } |
Zoltan Szatmary-Ban | 3d25b31 | 2014-08-18 10:54:19 +0100 | [diff] [blame] | 302 | |
| 303 | private ParceledListSlice<ParcelableString> makeAliasesParcelableSynchronised( |
| 304 | Set<String> aliasSet) { |
| 305 | List<ParcelableString> aliases = new ArrayList<ParcelableString>(aliasSet.size()); |
| 306 | for (String alias : aliasSet) { |
| 307 | ParcelableString parcelableString = new ParcelableString(); |
| 308 | parcelableString.string = alias; |
| 309 | aliases.add(parcelableString); |
| 310 | } |
| 311 | return new ParceledListSlice<ParcelableString>(aliases); |
| 312 | } |
| 313 | |
| 314 | @Override |
| 315 | public ParceledListSlice<ParcelableString> getUserCaAliases() { |
| 316 | synchronized (mTrustedCertificateStore) { |
| 317 | Set<String> aliasSet = mTrustedCertificateStore.userAliases(); |
| 318 | return makeAliasesParcelableSynchronised(aliasSet); |
| 319 | } |
| 320 | } |
| 321 | |
| 322 | @Override |
| 323 | public ParceledListSlice<ParcelableString> getSystemCaAliases() { |
| 324 | synchronized (mTrustedCertificateStore) { |
| 325 | Set<String> aliasSet = mTrustedCertificateStore.allSystemAliases(); |
| 326 | return makeAliasesParcelableSynchronised(aliasSet); |
| 327 | } |
| 328 | } |
| 329 | |
| 330 | @Override |
| 331 | public boolean containsCaAlias(String alias) { |
| 332 | return mTrustedCertificateStore.containsAlias(alias); |
| 333 | } |
| 334 | |
| 335 | @Override |
| 336 | public byte[] getEncodedCaCertificate(String alias, boolean includeDeletedSystem) { |
| 337 | synchronized (mTrustedCertificateStore) { |
| 338 | X509Certificate certificate = (X509Certificate) mTrustedCertificateStore |
| 339 | .getCertificate(alias, includeDeletedSystem); |
| 340 | if (certificate == null) { |
| 341 | Log.w(TAG, "Could not find CA certificate " + alias); |
| 342 | return null; |
| 343 | } |
| 344 | try { |
| 345 | return certificate.getEncoded(); |
| 346 | } catch (CertificateEncodingException e) { |
| 347 | Log.w(TAG, "Error while encoding CA certificate " + alias); |
| 348 | return null; |
| 349 | } |
| 350 | } |
| 351 | } |
| 352 | |
| 353 | @Override |
| 354 | public List<String> getCaCertificateChainAliases(String rootAlias, |
| 355 | boolean includeDeletedSystem) { |
| 356 | synchronized (mTrustedCertificateStore) { |
| 357 | X509Certificate root = (X509Certificate) mTrustedCertificateStore.getCertificate( |
| 358 | rootAlias, includeDeletedSystem); |
| 359 | try { |
| 360 | List<X509Certificate> chain = mTrustedCertificateStore.getCertificateChain( |
| 361 | root); |
| 362 | List<String> aliases = new ArrayList<String>(chain.size()); |
| 363 | final int n = chain.size(); |
| 364 | for (int i = 0; i < n; ++i) { |
| 365 | String alias = mTrustedCertificateStore.getCertificateAlias(chain.get(i), |
| 366 | true); |
| 367 | if (alias != null) { |
| 368 | aliases.add(alias); |
| 369 | } |
| 370 | } |
| 371 | return aliases; |
| 372 | } catch (CertificateException e) { |
| 373 | Log.w(TAG, "Error retrieving cert chain for root " + rootAlias); |
| 374 | return Collections.emptyList(); |
| 375 | } |
| 376 | } |
| 377 | } |
Brian Carlstrom | 3e6251d | 2011-04-11 09:05:06 -0700 | [diff] [blame] | 378 | }; |
| 379 | |
Fred Quintana | fb2e18e | 2011-07-13 14:54:05 -0700 | [diff] [blame] | 380 | private boolean hasGrantInternal(final SQLiteDatabase db, final int uid, final String alias) { |
| 381 | final long numMatches = DatabaseUtils.longForQuery(db, SELECTION_COUNT_OF_MATCHING_GRANTS, |
| 382 | new String[]{String.valueOf(uid), alias}); |
| 383 | return numMatches > 0; |
| 384 | } |
Brian Carlstrom | 3e6251d | 2011-04-11 09:05:06 -0700 | [diff] [blame] | 385 | |
Fred Quintana | fb2e18e | 2011-07-13 14:54:05 -0700 | [diff] [blame] | 386 | private void setGrantInternal(final SQLiteDatabase db, |
| 387 | final int uid, final String alias, final boolean value) { |
| 388 | if (value) { |
| 389 | if (!hasGrantInternal(db, uid, alias)) { |
| 390 | final ContentValues values = new ContentValues(); |
| 391 | values.put(GRANTS_ALIAS, alias); |
| 392 | values.put(GRANTS_GRANTEE_UID, uid); |
| 393 | db.insert(TABLE_GRANTS, GRANTS_ALIAS, values); |
| 394 | } |
| 395 | } else { |
| 396 | db.delete(TABLE_GRANTS, SELECT_GRANTS_BY_UID_AND_ALIAS, |
| 397 | new String[]{String.valueOf(uid), alias}); |
| 398 | } |
| 399 | } |
| 400 | |
Robin Lee | ba755b1 | 2016-02-24 15:27:43 +0000 | [diff] [blame] | 401 | private void removeGrantsForAlias(String alias) { |
| 402 | final SQLiteDatabase db = mDatabaseHelper.getWritableDatabase(); |
| 403 | db.delete(TABLE_GRANTS, SELECTION_GRANTS_BY_ALIAS, new String[] {alias}); |
| 404 | } |
| 405 | |
Fred Quintana | fb2e18e | 2011-07-13 14:54:05 -0700 | [diff] [blame] | 406 | private void removeAllGrants(final SQLiteDatabase db) { |
| 407 | db.delete(TABLE_GRANTS, null /* whereClause */, null /* whereArgs */); |
| 408 | } |
| 409 | |
| 410 | private class DatabaseHelper extends SQLiteOpenHelper { |
| 411 | public DatabaseHelper(Context context) { |
| 412 | super(context, DATABASE_NAME, null /* CursorFactory */, DATABASE_VERSION); |
| 413 | } |
| 414 | |
| 415 | @Override |
| 416 | public void onCreate(final SQLiteDatabase db) { |
| 417 | db.execSQL("CREATE TABLE " + TABLE_GRANTS + " ( " |
| 418 | + GRANTS_ALIAS + " STRING NOT NULL, " |
| 419 | + GRANTS_GRANTEE_UID + " INTEGER NOT NULL, " |
| 420 | + "UNIQUE (" + GRANTS_ALIAS + "," + GRANTS_GRANTEE_UID + "))"); |
| 421 | } |
| 422 | |
| 423 | @Override |
| 424 | public void onUpgrade(final SQLiteDatabase db, int oldVersion, final int newVersion) { |
| 425 | Log.e(TAG, "upgrade from version " + oldVersion + " to version " + newVersion); |
| 426 | |
| 427 | if (oldVersion == 1) { |
| 428 | // the first upgrade step goes here |
| 429 | oldVersion++; |
Brian Carlstrom | 3e6251d | 2011-04-11 09:05:06 -0700 | [diff] [blame] | 430 | } |
Brian Carlstrom | 7037b73 | 2011-06-30 15:04:49 -0700 | [diff] [blame] | 431 | } |
Fred Quintana | fb2e18e | 2011-07-13 14:54:05 -0700 | [diff] [blame] | 432 | } |
| 433 | |
| 434 | @Override public IBinder onBind(Intent intent) { |
Brian Carlstrom | 7037b73 | 2011-06-30 15:04:49 -0700 | [diff] [blame] | 435 | if (IKeyChainService.class.getName().equals(intent.getAction())) { |
Brian Carlstrom | 3e6251d | 2011-04-11 09:05:06 -0700 | [diff] [blame] | 436 | return mIKeyChainService; |
| 437 | } |
Brian Carlstrom | 3e6251d | 2011-04-11 09:05:06 -0700 | [diff] [blame] | 438 | return null; |
| 439 | } |
Fred Quintana | fb2e18e | 2011-07-13 14:54:05 -0700 | [diff] [blame] | 440 | |
| 441 | @Override |
| 442 | protected void onHandleIntent(final Intent intent) { |
| 443 | if (Intent.ACTION_PACKAGE_REMOVED.equals(intent.getAction())) { |
| 444 | purgeOldGrants(); |
| 445 | } |
| 446 | } |
| 447 | |
| 448 | private void purgeOldGrants() { |
| 449 | final PackageManager packageManager = getPackageManager(); |
| 450 | final SQLiteDatabase db = mDatabaseHelper.getWritableDatabase(); |
| 451 | Cursor cursor = null; |
| 452 | db.beginTransaction(); |
| 453 | try { |
| 454 | cursor = db.query(TABLE_GRANTS, |
| 455 | new String[]{GRANTS_GRANTEE_UID}, null, null, GRANTS_GRANTEE_UID, null, null); |
| 456 | while (cursor.moveToNext()) { |
| 457 | final int uid = cursor.getInt(0); |
| 458 | final boolean packageExists = packageManager.getPackagesForUid(uid) != null; |
| 459 | if (packageExists) { |
| 460 | continue; |
| 461 | } |
| 462 | Log.d(TAG, "deleting grants for UID " + uid |
| 463 | + " because its package is no longer installed"); |
| 464 | db.delete(TABLE_GRANTS, SELECTION_GRANTS_BY_UID, |
| 465 | new String[]{Integer.toString(uid)}); |
| 466 | } |
| 467 | db.setTransactionSuccessful(); |
| 468 | } finally { |
| 469 | if (cursor != null) { |
| 470 | cursor.close(); |
| 471 | } |
| 472 | db.endTransaction(); |
| 473 | } |
| 474 | } |
Selim Gurun | 39e36e5 | 2012-02-14 10:50:42 -0800 | [diff] [blame] | 475 | |
Chad Brubaker | 2099a7d | 2016-05-02 13:13:23 -0700 | [diff] [blame^] | 476 | private void broadcastLegacyStorageChange() { |
Selim Gurun | 39e36e5 | 2012-02-14 10:50:42 -0800 | [diff] [blame] | 477 | Intent intent = new Intent(KeyChain.ACTION_STORAGE_CHANGED); |
Chad Brubaker | 2099a7d | 2016-05-02 13:13:23 -0700 | [diff] [blame^] | 478 | BroadcastOptions opts = BroadcastOptions.makeBasic(); |
| 479 | // TODO: Make this N-MR1 once N-MR1 API is available. |
| 480 | opts.setMaxManifestReceiverApiLevel(Build.VERSION_CODES.N); |
| 481 | sendBroadcast(intent, null, opts.toBundle()); |
Selim Gurun | 39e36e5 | 2012-02-14 10:50:42 -0800 | [diff] [blame] | 482 | } |
| 483 | |
Chad Brubaker | 2099a7d | 2016-05-02 13:13:23 -0700 | [diff] [blame^] | 484 | private void broadcastKeychainChange() { |
| 485 | Intent intent = new Intent(KeyChain.ACTION_KEYCHAIN_CHANGED); |
| 486 | sendBroadcast(intent); |
| 487 | } |
| 488 | |
| 489 | private void broadcastTrustStoreChange() { |
| 490 | Intent intent = new Intent(KeyChain.ACTION_TRUST_STORE_CHANGED); |
| 491 | sendBroadcast(intent); |
| 492 | } |
| 493 | |
| 494 | private void broadcastPermissionChange(int uid, String alias, boolean access) { |
| 495 | // Since the permission change only impacts one uid only send to that uid's packages. |
| 496 | final PackageManager packageManager = getPackageManager(); |
| 497 | String[] packages = packageManager.getPackagesForUid(uid); |
| 498 | if (packages == null) { |
| 499 | return; |
| 500 | } |
| 501 | for (String pckg : packages) { |
| 502 | Intent intent = new Intent(KeyChain.ACTION_KEY_ACCESS_CHANGED); |
| 503 | intent.putExtra(KeyChain.EXTRA_KEY_ALIAS, alias); |
| 504 | intent.putExtra(KeyChain.EXTRA_KEY_ACCESSIBLE, access); |
| 505 | intent.setPackage(pckg); |
| 506 | sendBroadcast(intent); |
| 507 | } |
| 508 | } |
Brian Carlstrom | 3e6251d | 2011-04-11 09:05:06 -0700 | [diff] [blame] | 509 | } |