Shawn Willden | c1d1fee | 2016-01-26 22:44:56 -0700 | [diff] [blame] | 1 | /* |
| 2 | * Copyright (C) 2016 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 | |
Janis Danisevskis | 011675d | 2016-09-01 11:41:29 +0100 | [diff] [blame] | 17 | #define LOG_TAG "keystore" |
| 18 | |
Shawn Willden | c1d1fee | 2016-01-26 22:44:56 -0700 | [diff] [blame] | 19 | #include "key_store_service.h" |
| 20 | |
| 21 | #include <fcntl.h> |
| 22 | #include <sys/stat.h> |
| 23 | |
Janis Danisevskis | 7612fd4 | 2016-09-01 11:50:02 +0100 | [diff] [blame] | 24 | #include <algorithm> |
Shawn Willden | c1d1fee | 2016-01-26 22:44:56 -0700 | [diff] [blame] | 25 | #include <sstream> |
| 26 | |
Bartosz Fabianowski | a9452d9 | 2017-01-23 22:21:11 +0100 | [diff] [blame] | 27 | #include <binder/IInterface.h> |
Shawn Willden | c1d1fee | 2016-01-26 22:44:56 -0700 | [diff] [blame] | 28 | #include <binder/IPCThreadState.h> |
Bartosz Fabianowski | a9452d9 | 2017-01-23 22:21:11 +0100 | [diff] [blame] | 29 | #include <binder/IPermissionController.h> |
| 30 | #include <binder/IServiceManager.h> |
Shawn Willden | c1d1fee | 2016-01-26 22:44:56 -0700 | [diff] [blame] | 31 | |
| 32 | #include <private/android_filesystem_config.h> |
| 33 | |
Janis Danisevskis | c7a9fa2 | 2016-10-13 18:43:45 +0100 | [diff] [blame] | 34 | #include <android/hardware/keymaster/3.0/IHwKeymasterDevice.h> |
Shawn Willden | c1d1fee | 2016-01-26 22:44:56 -0700 | [diff] [blame] | 35 | |
| 36 | #include "defaults.h" |
Janis Danisevskis | 18f27ad | 2016-06-01 13:57:40 -0700 | [diff] [blame] | 37 | #include "keystore_attestation_id.h" |
Janis Danisevskis | c7a9fa2 | 2016-10-13 18:43:45 +0100 | [diff] [blame] | 38 | #include "keystore_keymaster_enforcement.h" |
Shawn Willden | c1d1fee | 2016-01-26 22:44:56 -0700 | [diff] [blame] | 39 | #include "keystore_utils.h" |
Janis Danisevskis | c7a9fa2 | 2016-10-13 18:43:45 +0100 | [diff] [blame] | 40 | #include <keystore/keystore_hidl_support.h> |
Shawn Willden | c1d1fee | 2016-01-26 22:44:56 -0700 | [diff] [blame] | 41 | |
Janis Danisevskis | c7a9fa2 | 2016-10-13 18:43:45 +0100 | [diff] [blame] | 42 | namespace keystore { |
| 43 | using namespace android; |
Shawn Willden | c1d1fee | 2016-01-26 22:44:56 -0700 | [diff] [blame] | 44 | |
| 45 | const size_t MAX_OPERATIONS = 15; |
| 46 | |
| 47 | struct BIGNUM_Delete { |
| 48 | void operator()(BIGNUM* p) const { BN_free(p); } |
| 49 | }; |
| 50 | typedef UniquePtr<BIGNUM, BIGNUM_Delete> Unique_BIGNUM; |
| 51 | |
| 52 | void KeyStoreService::binderDied(const wp<IBinder>& who) { |
| 53 | auto operations = mOperationMap.getOperationsForToken(who.unsafe_get()); |
Chih-Hung Hsieh | 24b2a39 | 2016-07-28 10:35:24 -0700 | [diff] [blame] | 54 | for (const auto& token : operations) { |
Shawn Willden | c1d1fee | 2016-01-26 22:44:56 -0700 | [diff] [blame] | 55 | abort(token); |
| 56 | } |
| 57 | } |
| 58 | |
Janis Danisevskis | c7a9fa2 | 2016-10-13 18:43:45 +0100 | [diff] [blame] | 59 | KeyStoreServiceReturnCode KeyStoreService::getState(int32_t userId) { |
Shawn Willden | c1d1fee | 2016-01-26 22:44:56 -0700 | [diff] [blame] | 60 | if (!checkBinderPermission(P_GET_STATE)) { |
Janis Danisevskis | c7a9fa2 | 2016-10-13 18:43:45 +0100 | [diff] [blame] | 61 | return ResponseCode::PERMISSION_DENIED; |
Shawn Willden | c1d1fee | 2016-01-26 22:44:56 -0700 | [diff] [blame] | 62 | } |
| 63 | |
Janis Danisevskis | c7a9fa2 | 2016-10-13 18:43:45 +0100 | [diff] [blame] | 64 | return ResponseCode(mKeyStore->getState(userId)); |
Shawn Willden | c1d1fee | 2016-01-26 22:44:56 -0700 | [diff] [blame] | 65 | } |
| 66 | |
Janis Danisevskis | c7a9fa2 | 2016-10-13 18:43:45 +0100 | [diff] [blame] | 67 | KeyStoreServiceReturnCode KeyStoreService::get(const String16& name, int32_t uid, |
| 68 | hidl_vec<uint8_t>* item) { |
Shawn Willden | c1d1fee | 2016-01-26 22:44:56 -0700 | [diff] [blame] | 69 | uid_t targetUid = getEffectiveUid(uid); |
| 70 | if (!checkBinderPermission(P_GET, targetUid)) { |
Janis Danisevskis | c7a9fa2 | 2016-10-13 18:43:45 +0100 | [diff] [blame] | 71 | return ResponseCode::PERMISSION_DENIED; |
Shawn Willden | c1d1fee | 2016-01-26 22:44:56 -0700 | [diff] [blame] | 72 | } |
| 73 | |
| 74 | String8 name8(name); |
| 75 | Blob keyBlob; |
| 76 | |
Janis Danisevskis | c7a9fa2 | 2016-10-13 18:43:45 +0100 | [diff] [blame] | 77 | KeyStoreServiceReturnCode rc = |
| 78 | mKeyStore->getKeyForName(&keyBlob, name8, targetUid, TYPE_GENERIC); |
| 79 | if (!rc.isOk()) { |
| 80 | if (item) *item = hidl_vec<uint8_t>(); |
| 81 | return rc; |
Shawn Willden | c1d1fee | 2016-01-26 22:44:56 -0700 | [diff] [blame] | 82 | } |
| 83 | |
Janis Danisevskis | c7a9fa2 | 2016-10-13 18:43:45 +0100 | [diff] [blame] | 84 | // Do not replace this with "if (item) *item = blob2hidlVec(keyBlob)"! |
| 85 | // blob2hidlVec creates a hidl_vec<uint8_t> that references, but not owns, the data in keyBlob |
| 86 | // the subsequent assignment (*item = resultBlob) makes a deep copy, so that *item will own the |
| 87 | // corresponding resources. |
| 88 | auto resultBlob = blob2hidlVec(keyBlob); |
| 89 | if (item) { |
| 90 | *item = resultBlob; |
| 91 | } |
Shawn Willden | c1d1fee | 2016-01-26 22:44:56 -0700 | [diff] [blame] | 92 | |
Janis Danisevskis | c7a9fa2 | 2016-10-13 18:43:45 +0100 | [diff] [blame] | 93 | return ResponseCode::NO_ERROR; |
Shawn Willden | c1d1fee | 2016-01-26 22:44:56 -0700 | [diff] [blame] | 94 | } |
| 95 | |
Janis Danisevskis | c7a9fa2 | 2016-10-13 18:43:45 +0100 | [diff] [blame] | 96 | KeyStoreServiceReturnCode KeyStoreService::insert(const String16& name, |
| 97 | const hidl_vec<uint8_t>& item, int targetUid, |
| 98 | int32_t flags) { |
Shawn Willden | c1d1fee | 2016-01-26 22:44:56 -0700 | [diff] [blame] | 99 | targetUid = getEffectiveUid(targetUid); |
Janis Danisevskis | c7a9fa2 | 2016-10-13 18:43:45 +0100 | [diff] [blame] | 100 | auto result = |
Shawn Willden | c1d1fee | 2016-01-26 22:44:56 -0700 | [diff] [blame] | 101 | checkBinderPermissionAndKeystoreState(P_INSERT, targetUid, flags & KEYSTORE_FLAG_ENCRYPTED); |
Janis Danisevskis | c7a9fa2 | 2016-10-13 18:43:45 +0100 | [diff] [blame] | 102 | if (!result.isOk()) { |
Shawn Willden | c1d1fee | 2016-01-26 22:44:56 -0700 | [diff] [blame] | 103 | return result; |
| 104 | } |
| 105 | |
| 106 | String8 name8(name); |
Tucker Sylvestro | 0ab28b7 | 2016-08-05 18:02:47 -0400 | [diff] [blame] | 107 | String8 filename(mKeyStore->getKeyNameForUidWithDir(name8, targetUid, ::TYPE_GENERIC)); |
Shawn Willden | c1d1fee | 2016-01-26 22:44:56 -0700 | [diff] [blame] | 108 | |
Janis Danisevskis | c7a9fa2 | 2016-10-13 18:43:45 +0100 | [diff] [blame] | 109 | Blob keyBlob(&item[0], item.size(), NULL, 0, ::TYPE_GENERIC); |
Shawn Willden | c1d1fee | 2016-01-26 22:44:56 -0700 | [diff] [blame] | 110 | keyBlob.setEncrypted(flags & KEYSTORE_FLAG_ENCRYPTED); |
| 111 | |
| 112 | return mKeyStore->put(filename.string(), &keyBlob, get_user_id(targetUid)); |
| 113 | } |
| 114 | |
Janis Danisevskis | c7a9fa2 | 2016-10-13 18:43:45 +0100 | [diff] [blame] | 115 | KeyStoreServiceReturnCode KeyStoreService::del(const String16& name, int targetUid) { |
Shawn Willden | c1d1fee | 2016-01-26 22:44:56 -0700 | [diff] [blame] | 116 | targetUid = getEffectiveUid(targetUid); |
| 117 | if (!checkBinderPermission(P_DELETE, targetUid)) { |
Janis Danisevskis | c7a9fa2 | 2016-10-13 18:43:45 +0100 | [diff] [blame] | 118 | return ResponseCode::PERMISSION_DENIED; |
Shawn Willden | c1d1fee | 2016-01-26 22:44:56 -0700 | [diff] [blame] | 119 | } |
| 120 | String8 name8(name); |
Tucker Sylvestro | 0ab28b7 | 2016-08-05 18:02:47 -0400 | [diff] [blame] | 121 | String8 filename(mKeyStore->getKeyNameForUidWithDir(name8, targetUid, ::TYPE_ANY)); |
Janis Danisevskis | c7a9fa2 | 2016-10-13 18:43:45 +0100 | [diff] [blame] | 122 | ResponseCode result = mKeyStore->del(filename.string(), ::TYPE_ANY, get_user_id(targetUid)); |
| 123 | if (result != ResponseCode::NO_ERROR) { |
Tucker Sylvestro | 0ab28b7 | 2016-08-05 18:02:47 -0400 | [diff] [blame] | 124 | return result; |
| 125 | } |
| 126 | |
| 127 | // Also delete any characteristics files |
Janis Danisevskis | c7a9fa2 | 2016-10-13 18:43:45 +0100 | [diff] [blame] | 128 | String8 chrFilename( |
| 129 | mKeyStore->getKeyNameForUidWithDir(name8, targetUid, ::TYPE_KEY_CHARACTERISTICS)); |
Tucker Sylvestro | 0ab28b7 | 2016-08-05 18:02:47 -0400 | [diff] [blame] | 130 | return mKeyStore->del(chrFilename.string(), ::TYPE_KEY_CHARACTERISTICS, get_user_id(targetUid)); |
Shawn Willden | c1d1fee | 2016-01-26 22:44:56 -0700 | [diff] [blame] | 131 | } |
| 132 | |
Janis Danisevskis | c7a9fa2 | 2016-10-13 18:43:45 +0100 | [diff] [blame] | 133 | KeyStoreServiceReturnCode KeyStoreService::exist(const String16& name, int targetUid) { |
Shawn Willden | c1d1fee | 2016-01-26 22:44:56 -0700 | [diff] [blame] | 134 | targetUid = getEffectiveUid(targetUid); |
| 135 | if (!checkBinderPermission(P_EXIST, targetUid)) { |
Janis Danisevskis | c7a9fa2 | 2016-10-13 18:43:45 +0100 | [diff] [blame] | 136 | return ResponseCode::PERMISSION_DENIED; |
Shawn Willden | c1d1fee | 2016-01-26 22:44:56 -0700 | [diff] [blame] | 137 | } |
| 138 | |
| 139 | String8 name8(name); |
Tucker Sylvestro | 0ab28b7 | 2016-08-05 18:02:47 -0400 | [diff] [blame] | 140 | String8 filename(mKeyStore->getKeyNameForUidWithDir(name8, targetUid, ::TYPE_ANY)); |
Shawn Willden | c1d1fee | 2016-01-26 22:44:56 -0700 | [diff] [blame] | 141 | |
| 142 | if (access(filename.string(), R_OK) == -1) { |
Janis Danisevskis | c7a9fa2 | 2016-10-13 18:43:45 +0100 | [diff] [blame] | 143 | return (errno != ENOENT) ? ResponseCode::SYSTEM_ERROR : ResponseCode::KEY_NOT_FOUND; |
Shawn Willden | c1d1fee | 2016-01-26 22:44:56 -0700 | [diff] [blame] | 144 | } |
Janis Danisevskis | c7a9fa2 | 2016-10-13 18:43:45 +0100 | [diff] [blame] | 145 | return ResponseCode::NO_ERROR; |
Shawn Willden | c1d1fee | 2016-01-26 22:44:56 -0700 | [diff] [blame] | 146 | } |
| 147 | |
Janis Danisevskis | c7a9fa2 | 2016-10-13 18:43:45 +0100 | [diff] [blame] | 148 | KeyStoreServiceReturnCode KeyStoreService::list(const String16& prefix, int targetUid, |
| 149 | Vector<String16>* matches) { |
Shawn Willden | c1d1fee | 2016-01-26 22:44:56 -0700 | [diff] [blame] | 150 | targetUid = getEffectiveUid(targetUid); |
| 151 | if (!checkBinderPermission(P_LIST, targetUid)) { |
Janis Danisevskis | c7a9fa2 | 2016-10-13 18:43:45 +0100 | [diff] [blame] | 152 | return ResponseCode::PERMISSION_DENIED; |
Shawn Willden | c1d1fee | 2016-01-26 22:44:56 -0700 | [diff] [blame] | 153 | } |
| 154 | const String8 prefix8(prefix); |
Tucker Sylvestro | 0ab28b7 | 2016-08-05 18:02:47 -0400 | [diff] [blame] | 155 | String8 filename(mKeyStore->getKeyNameForUid(prefix8, targetUid, TYPE_ANY)); |
Shawn Willden | c1d1fee | 2016-01-26 22:44:56 -0700 | [diff] [blame] | 156 | |
Janis Danisevskis | c7a9fa2 | 2016-10-13 18:43:45 +0100 | [diff] [blame] | 157 | if (mKeyStore->list(filename, matches, get_user_id(targetUid)) != ResponseCode::NO_ERROR) { |
| 158 | return ResponseCode::SYSTEM_ERROR; |
Shawn Willden | c1d1fee | 2016-01-26 22:44:56 -0700 | [diff] [blame] | 159 | } |
Janis Danisevskis | c7a9fa2 | 2016-10-13 18:43:45 +0100 | [diff] [blame] | 160 | return ResponseCode::NO_ERROR; |
Shawn Willden | c1d1fee | 2016-01-26 22:44:56 -0700 | [diff] [blame] | 161 | } |
| 162 | |
Janis Danisevskis | c7a9fa2 | 2016-10-13 18:43:45 +0100 | [diff] [blame] | 163 | KeyStoreServiceReturnCode KeyStoreService::reset() { |
Shawn Willden | c1d1fee | 2016-01-26 22:44:56 -0700 | [diff] [blame] | 164 | if (!checkBinderPermission(P_RESET)) { |
Janis Danisevskis | c7a9fa2 | 2016-10-13 18:43:45 +0100 | [diff] [blame] | 165 | return ResponseCode::PERMISSION_DENIED; |
Shawn Willden | c1d1fee | 2016-01-26 22:44:56 -0700 | [diff] [blame] | 166 | } |
| 167 | |
| 168 | uid_t callingUid = IPCThreadState::self()->getCallingUid(); |
| 169 | mKeyStore->resetUser(get_user_id(callingUid), false); |
Janis Danisevskis | c7a9fa2 | 2016-10-13 18:43:45 +0100 | [diff] [blame] | 170 | return ResponseCode::NO_ERROR; |
Shawn Willden | c1d1fee | 2016-01-26 22:44:56 -0700 | [diff] [blame] | 171 | } |
| 172 | |
Janis Danisevskis | c7a9fa2 | 2016-10-13 18:43:45 +0100 | [diff] [blame] | 173 | KeyStoreServiceReturnCode KeyStoreService::onUserPasswordChanged(int32_t userId, |
| 174 | const String16& password) { |
Shawn Willden | c1d1fee | 2016-01-26 22:44:56 -0700 | [diff] [blame] | 175 | if (!checkBinderPermission(P_PASSWORD)) { |
Janis Danisevskis | c7a9fa2 | 2016-10-13 18:43:45 +0100 | [diff] [blame] | 176 | return ResponseCode::PERMISSION_DENIED; |
Shawn Willden | c1d1fee | 2016-01-26 22:44:56 -0700 | [diff] [blame] | 177 | } |
| 178 | |
| 179 | const String8 password8(password); |
| 180 | // Flush the auth token table to prevent stale tokens from sticking |
| 181 | // around. |
| 182 | mAuthTokenTable.Clear(); |
| 183 | |
| 184 | if (password.size() == 0) { |
| 185 | ALOGI("Secure lockscreen for user %d removed, deleting encrypted entries", userId); |
| 186 | mKeyStore->resetUser(userId, true); |
Janis Danisevskis | c7a9fa2 | 2016-10-13 18:43:45 +0100 | [diff] [blame] | 187 | return ResponseCode::NO_ERROR; |
Shawn Willden | c1d1fee | 2016-01-26 22:44:56 -0700 | [diff] [blame] | 188 | } else { |
| 189 | switch (mKeyStore->getState(userId)) { |
| 190 | case ::STATE_UNINITIALIZED: { |
| 191 | // generate master key, encrypt with password, write to file, |
| 192 | // initialize mMasterKey*. |
| 193 | return mKeyStore->initializeUser(password8, userId); |
| 194 | } |
| 195 | case ::STATE_NO_ERROR: { |
| 196 | // rewrite master key with new password. |
| 197 | return mKeyStore->writeMasterKey(password8, userId); |
| 198 | } |
| 199 | case ::STATE_LOCKED: { |
| 200 | ALOGE("Changing user %d's password while locked, clearing old encryption", userId); |
| 201 | mKeyStore->resetUser(userId, true); |
| 202 | return mKeyStore->initializeUser(password8, userId); |
| 203 | } |
| 204 | } |
Janis Danisevskis | c7a9fa2 | 2016-10-13 18:43:45 +0100 | [diff] [blame] | 205 | return ResponseCode::SYSTEM_ERROR; |
Shawn Willden | c1d1fee | 2016-01-26 22:44:56 -0700 | [diff] [blame] | 206 | } |
| 207 | } |
| 208 | |
Janis Danisevskis | c7a9fa2 | 2016-10-13 18:43:45 +0100 | [diff] [blame] | 209 | KeyStoreServiceReturnCode KeyStoreService::onUserAdded(int32_t userId, int32_t parentId) { |
Shawn Willden | c1d1fee | 2016-01-26 22:44:56 -0700 | [diff] [blame] | 210 | if (!checkBinderPermission(P_USER_CHANGED)) { |
Janis Danisevskis | c7a9fa2 | 2016-10-13 18:43:45 +0100 | [diff] [blame] | 211 | return ResponseCode::PERMISSION_DENIED; |
Shawn Willden | c1d1fee | 2016-01-26 22:44:56 -0700 | [diff] [blame] | 212 | } |
| 213 | |
| 214 | // Sanity check that the new user has an empty keystore. |
| 215 | if (!mKeyStore->isEmpty(userId)) { |
| 216 | ALOGW("New user %d's keystore not empty. Clearing old entries.", userId); |
| 217 | } |
| 218 | // Unconditionally clear the keystore, just to be safe. |
| 219 | mKeyStore->resetUser(userId, false); |
| 220 | if (parentId != -1) { |
| 221 | // This profile must share the same master key password as the parent profile. Because the |
| 222 | // password of the parent profile is not known here, the best we can do is copy the parent's |
| 223 | // master key and master key file. This makes this profile use the same master key as the |
| 224 | // parent profile, forever. |
| 225 | return mKeyStore->copyMasterKey(parentId, userId); |
| 226 | } else { |
Janis Danisevskis | c7a9fa2 | 2016-10-13 18:43:45 +0100 | [diff] [blame] | 227 | return ResponseCode::NO_ERROR; |
Shawn Willden | c1d1fee | 2016-01-26 22:44:56 -0700 | [diff] [blame] | 228 | } |
| 229 | } |
| 230 | |
Janis Danisevskis | c7a9fa2 | 2016-10-13 18:43:45 +0100 | [diff] [blame] | 231 | KeyStoreServiceReturnCode KeyStoreService::onUserRemoved(int32_t userId) { |
Shawn Willden | c1d1fee | 2016-01-26 22:44:56 -0700 | [diff] [blame] | 232 | if (!checkBinderPermission(P_USER_CHANGED)) { |
Janis Danisevskis | c7a9fa2 | 2016-10-13 18:43:45 +0100 | [diff] [blame] | 233 | return ResponseCode::PERMISSION_DENIED; |
Shawn Willden | c1d1fee | 2016-01-26 22:44:56 -0700 | [diff] [blame] | 234 | } |
| 235 | |
| 236 | mKeyStore->resetUser(userId, false); |
Janis Danisevskis | c7a9fa2 | 2016-10-13 18:43:45 +0100 | [diff] [blame] | 237 | return ResponseCode::NO_ERROR; |
Shawn Willden | c1d1fee | 2016-01-26 22:44:56 -0700 | [diff] [blame] | 238 | } |
| 239 | |
Janis Danisevskis | c7a9fa2 | 2016-10-13 18:43:45 +0100 | [diff] [blame] | 240 | KeyStoreServiceReturnCode KeyStoreService::lock(int32_t userId) { |
Shawn Willden | c1d1fee | 2016-01-26 22:44:56 -0700 | [diff] [blame] | 241 | if (!checkBinderPermission(P_LOCK)) { |
Janis Danisevskis | c7a9fa2 | 2016-10-13 18:43:45 +0100 | [diff] [blame] | 242 | return ResponseCode::PERMISSION_DENIED; |
Shawn Willden | c1d1fee | 2016-01-26 22:44:56 -0700 | [diff] [blame] | 243 | } |
| 244 | |
| 245 | State state = mKeyStore->getState(userId); |
| 246 | if (state != ::STATE_NO_ERROR) { |
| 247 | ALOGD("calling lock in state: %d", state); |
Janis Danisevskis | c7a9fa2 | 2016-10-13 18:43:45 +0100 | [diff] [blame] | 248 | return ResponseCode(state); |
Shawn Willden | c1d1fee | 2016-01-26 22:44:56 -0700 | [diff] [blame] | 249 | } |
| 250 | |
| 251 | mKeyStore->lock(userId); |
Janis Danisevskis | c7a9fa2 | 2016-10-13 18:43:45 +0100 | [diff] [blame] | 252 | return ResponseCode::NO_ERROR; |
Shawn Willden | c1d1fee | 2016-01-26 22:44:56 -0700 | [diff] [blame] | 253 | } |
| 254 | |
Janis Danisevskis | c7a9fa2 | 2016-10-13 18:43:45 +0100 | [diff] [blame] | 255 | KeyStoreServiceReturnCode KeyStoreService::unlock(int32_t userId, const String16& pw) { |
Shawn Willden | c1d1fee | 2016-01-26 22:44:56 -0700 | [diff] [blame] | 256 | if (!checkBinderPermission(P_UNLOCK)) { |
Janis Danisevskis | c7a9fa2 | 2016-10-13 18:43:45 +0100 | [diff] [blame] | 257 | return ResponseCode::PERMISSION_DENIED; |
Shawn Willden | c1d1fee | 2016-01-26 22:44:56 -0700 | [diff] [blame] | 258 | } |
| 259 | |
| 260 | State state = mKeyStore->getState(userId); |
| 261 | if (state != ::STATE_LOCKED) { |
| 262 | switch (state) { |
| 263 | case ::STATE_NO_ERROR: |
| 264 | ALOGI("calling unlock when already unlocked, ignoring."); |
| 265 | break; |
| 266 | case ::STATE_UNINITIALIZED: |
| 267 | ALOGE("unlock called on uninitialized keystore."); |
| 268 | break; |
| 269 | default: |
| 270 | ALOGE("unlock called on keystore in unknown state: %d", state); |
| 271 | break; |
| 272 | } |
Janis Danisevskis | c7a9fa2 | 2016-10-13 18:43:45 +0100 | [diff] [blame] | 273 | return ResponseCode(state); |
Shawn Willden | c1d1fee | 2016-01-26 22:44:56 -0700 | [diff] [blame] | 274 | } |
| 275 | |
| 276 | const String8 password8(pw); |
| 277 | // read master key, decrypt with password, initialize mMasterKey*. |
| 278 | return mKeyStore->readMasterKey(password8, userId); |
| 279 | } |
| 280 | |
| 281 | bool KeyStoreService::isEmpty(int32_t userId) { |
| 282 | if (!checkBinderPermission(P_IS_EMPTY)) { |
| 283 | return false; |
| 284 | } |
| 285 | |
| 286 | return mKeyStore->isEmpty(userId); |
| 287 | } |
| 288 | |
Janis Danisevskis | c7a9fa2 | 2016-10-13 18:43:45 +0100 | [diff] [blame] | 289 | KeyStoreServiceReturnCode KeyStoreService::generate(const String16& name, int32_t targetUid, |
| 290 | int32_t keyType, int32_t keySize, int32_t flags, |
| 291 | Vector<sp<KeystoreArg>>* args) { |
Shawn Willden | c1d1fee | 2016-01-26 22:44:56 -0700 | [diff] [blame] | 292 | targetUid = getEffectiveUid(targetUid); |
Janis Danisevskis | c7a9fa2 | 2016-10-13 18:43:45 +0100 | [diff] [blame] | 293 | auto result = |
Shawn Willden | c1d1fee | 2016-01-26 22:44:56 -0700 | [diff] [blame] | 294 | checkBinderPermissionAndKeystoreState(P_INSERT, targetUid, flags & KEYSTORE_FLAG_ENCRYPTED); |
Janis Danisevskis | c7a9fa2 | 2016-10-13 18:43:45 +0100 | [diff] [blame] | 295 | if (!result.isOk()) { |
Shawn Willden | c1d1fee | 2016-01-26 22:44:56 -0700 | [diff] [blame] | 296 | return result; |
| 297 | } |
| 298 | |
Janis Danisevskis | c7a9fa2 | 2016-10-13 18:43:45 +0100 | [diff] [blame] | 299 | keystore::AuthorizationSet params; |
| 300 | add_legacy_key_authorizations(keyType, ¶ms); |
Shawn Willden | c1d1fee | 2016-01-26 22:44:56 -0700 | [diff] [blame] | 301 | |
| 302 | switch (keyType) { |
| 303 | case EVP_PKEY_EC: { |
Janis Danisevskis | c7a9fa2 | 2016-10-13 18:43:45 +0100 | [diff] [blame] | 304 | params.push_back(TAG_ALGORITHM, Algorithm::EC); |
Shawn Willden | c1d1fee | 2016-01-26 22:44:56 -0700 | [diff] [blame] | 305 | if (keySize == -1) { |
| 306 | keySize = EC_DEFAULT_KEY_SIZE; |
| 307 | } else if (keySize < EC_MIN_KEY_SIZE || keySize > EC_MAX_KEY_SIZE) { |
| 308 | ALOGI("invalid key size %d", keySize); |
Janis Danisevskis | c7a9fa2 | 2016-10-13 18:43:45 +0100 | [diff] [blame] | 309 | return ResponseCode::SYSTEM_ERROR; |
Shawn Willden | c1d1fee | 2016-01-26 22:44:56 -0700 | [diff] [blame] | 310 | } |
Janis Danisevskis | c7a9fa2 | 2016-10-13 18:43:45 +0100 | [diff] [blame] | 311 | params.push_back(TAG_KEY_SIZE, keySize); |
Shawn Willden | c1d1fee | 2016-01-26 22:44:56 -0700 | [diff] [blame] | 312 | break; |
| 313 | } |
| 314 | case EVP_PKEY_RSA: { |
Janis Danisevskis | c7a9fa2 | 2016-10-13 18:43:45 +0100 | [diff] [blame] | 315 | params.push_back(TAG_ALGORITHM, Algorithm::RSA); |
Shawn Willden | c1d1fee | 2016-01-26 22:44:56 -0700 | [diff] [blame] | 316 | if (keySize == -1) { |
| 317 | keySize = RSA_DEFAULT_KEY_SIZE; |
| 318 | } else if (keySize < RSA_MIN_KEY_SIZE || keySize > RSA_MAX_KEY_SIZE) { |
| 319 | ALOGI("invalid key size %d", keySize); |
Janis Danisevskis | c7a9fa2 | 2016-10-13 18:43:45 +0100 | [diff] [blame] | 320 | return ResponseCode::SYSTEM_ERROR; |
Shawn Willden | c1d1fee | 2016-01-26 22:44:56 -0700 | [diff] [blame] | 321 | } |
Janis Danisevskis | c7a9fa2 | 2016-10-13 18:43:45 +0100 | [diff] [blame] | 322 | params.push_back(TAG_KEY_SIZE, keySize); |
Shawn Willden | c1d1fee | 2016-01-26 22:44:56 -0700 | [diff] [blame] | 323 | unsigned long exponent = RSA_DEFAULT_EXPONENT; |
| 324 | if (args->size() > 1) { |
| 325 | ALOGI("invalid number of arguments: %zu", args->size()); |
Janis Danisevskis | c7a9fa2 | 2016-10-13 18:43:45 +0100 | [diff] [blame] | 326 | return ResponseCode::SYSTEM_ERROR; |
Shawn Willden | c1d1fee | 2016-01-26 22:44:56 -0700 | [diff] [blame] | 327 | } else if (args->size() == 1) { |
Chih-Hung Hsieh | 24b2a39 | 2016-07-28 10:35:24 -0700 | [diff] [blame] | 328 | const sp<KeystoreArg>& expArg = args->itemAt(0); |
Shawn Willden | c1d1fee | 2016-01-26 22:44:56 -0700 | [diff] [blame] | 329 | if (expArg != NULL) { |
| 330 | Unique_BIGNUM pubExpBn(BN_bin2bn( |
| 331 | reinterpret_cast<const unsigned char*>(expArg->data()), expArg->size(), NULL)); |
| 332 | if (pubExpBn.get() == NULL) { |
| 333 | ALOGI("Could not convert public exponent to BN"); |
Janis Danisevskis | c7a9fa2 | 2016-10-13 18:43:45 +0100 | [diff] [blame] | 334 | return ResponseCode::SYSTEM_ERROR; |
Shawn Willden | c1d1fee | 2016-01-26 22:44:56 -0700 | [diff] [blame] | 335 | } |
| 336 | exponent = BN_get_word(pubExpBn.get()); |
| 337 | if (exponent == 0xFFFFFFFFL) { |
| 338 | ALOGW("cannot represent public exponent as a long value"); |
Janis Danisevskis | c7a9fa2 | 2016-10-13 18:43:45 +0100 | [diff] [blame] | 339 | return ResponseCode::SYSTEM_ERROR; |
Shawn Willden | c1d1fee | 2016-01-26 22:44:56 -0700 | [diff] [blame] | 340 | } |
| 341 | } else { |
| 342 | ALOGW("public exponent not read"); |
Janis Danisevskis | c7a9fa2 | 2016-10-13 18:43:45 +0100 | [diff] [blame] | 343 | return ResponseCode::SYSTEM_ERROR; |
Shawn Willden | c1d1fee | 2016-01-26 22:44:56 -0700 | [diff] [blame] | 344 | } |
| 345 | } |
Janis Danisevskis | c7a9fa2 | 2016-10-13 18:43:45 +0100 | [diff] [blame] | 346 | params.push_back(TAG_RSA_PUBLIC_EXPONENT, exponent); |
Shawn Willden | c1d1fee | 2016-01-26 22:44:56 -0700 | [diff] [blame] | 347 | break; |
| 348 | } |
| 349 | default: { |
| 350 | ALOGW("Unsupported key type %d", keyType); |
Janis Danisevskis | c7a9fa2 | 2016-10-13 18:43:45 +0100 | [diff] [blame] | 351 | return ResponseCode::SYSTEM_ERROR; |
Shawn Willden | c1d1fee | 2016-01-26 22:44:56 -0700 | [diff] [blame] | 352 | } |
| 353 | } |
| 354 | |
Janis Danisevskis | c7a9fa2 | 2016-10-13 18:43:45 +0100 | [diff] [blame] | 355 | auto rc = generateKey(name, params.hidl_data(), hidl_vec<uint8_t>(), targetUid, flags, |
| 356 | /*outCharacteristics*/ NULL); |
| 357 | if (!rc.isOk()) { |
| 358 | ALOGW("generate failed: %d", int32_t(rc)); |
Shawn Willden | c1d1fee | 2016-01-26 22:44:56 -0700 | [diff] [blame] | 359 | } |
| 360 | return translateResultToLegacyResult(rc); |
| 361 | } |
| 362 | |
Janis Danisevskis | c7a9fa2 | 2016-10-13 18:43:45 +0100 | [diff] [blame] | 363 | KeyStoreServiceReturnCode KeyStoreService::import(const String16& name, |
| 364 | const hidl_vec<uint8_t>& data, int targetUid, |
| 365 | int32_t flags) { |
Shawn Willden | c1d1fee | 2016-01-26 22:44:56 -0700 | [diff] [blame] | 366 | |
Janis Danisevskis | c7a9fa2 | 2016-10-13 18:43:45 +0100 | [diff] [blame] | 367 | const uint8_t* ptr = &data[0]; |
| 368 | |
| 369 | Unique_PKCS8_PRIV_KEY_INFO pkcs8(d2i_PKCS8_PRIV_KEY_INFO(NULL, &ptr, data.size())); |
Shawn Willden | c1d1fee | 2016-01-26 22:44:56 -0700 | [diff] [blame] | 370 | if (!pkcs8.get()) { |
Janis Danisevskis | c7a9fa2 | 2016-10-13 18:43:45 +0100 | [diff] [blame] | 371 | return ResponseCode::SYSTEM_ERROR; |
Shawn Willden | c1d1fee | 2016-01-26 22:44:56 -0700 | [diff] [blame] | 372 | } |
| 373 | Unique_EVP_PKEY pkey(EVP_PKCS82PKEY(pkcs8.get())); |
| 374 | if (!pkey.get()) { |
Janis Danisevskis | c7a9fa2 | 2016-10-13 18:43:45 +0100 | [diff] [blame] | 375 | return ResponseCode::SYSTEM_ERROR; |
Shawn Willden | c1d1fee | 2016-01-26 22:44:56 -0700 | [diff] [blame] | 376 | } |
| 377 | int type = EVP_PKEY_type(pkey->type); |
Janis Danisevskis | c7a9fa2 | 2016-10-13 18:43:45 +0100 | [diff] [blame] | 378 | AuthorizationSet params; |
| 379 | add_legacy_key_authorizations(type, ¶ms); |
Shawn Willden | c1d1fee | 2016-01-26 22:44:56 -0700 | [diff] [blame] | 380 | switch (type) { |
| 381 | case EVP_PKEY_RSA: |
Janis Danisevskis | c7a9fa2 | 2016-10-13 18:43:45 +0100 | [diff] [blame] | 382 | params.push_back(TAG_ALGORITHM, Algorithm::RSA); |
Shawn Willden | c1d1fee | 2016-01-26 22:44:56 -0700 | [diff] [blame] | 383 | break; |
| 384 | case EVP_PKEY_EC: |
Janis Danisevskis | c7a9fa2 | 2016-10-13 18:43:45 +0100 | [diff] [blame] | 385 | params.push_back(TAG_ALGORITHM, Algorithm::EC); |
Shawn Willden | c1d1fee | 2016-01-26 22:44:56 -0700 | [diff] [blame] | 386 | break; |
| 387 | default: |
| 388 | ALOGW("Unsupported key type %d", type); |
Janis Danisevskis | c7a9fa2 | 2016-10-13 18:43:45 +0100 | [diff] [blame] | 389 | return ResponseCode::SYSTEM_ERROR; |
Shawn Willden | c1d1fee | 2016-01-26 22:44:56 -0700 | [diff] [blame] | 390 | } |
Janis Danisevskis | c7a9fa2 | 2016-10-13 18:43:45 +0100 | [diff] [blame] | 391 | |
| 392 | auto rc = importKey(name, params.hidl_data(), KeyFormat::PKCS8, data, targetUid, flags, |
| 393 | /*outCharacteristics*/ NULL); |
| 394 | |
| 395 | if (!rc.isOk()) { |
| 396 | ALOGW("importKey failed: %d", int32_t(rc)); |
Shawn Willden | c1d1fee | 2016-01-26 22:44:56 -0700 | [diff] [blame] | 397 | } |
| 398 | return translateResultToLegacyResult(rc); |
| 399 | } |
| 400 | |
Janis Danisevskis | c7a9fa2 | 2016-10-13 18:43:45 +0100 | [diff] [blame] | 401 | KeyStoreServiceReturnCode KeyStoreService::sign(const String16& name, const hidl_vec<uint8_t>& data, |
| 402 | hidl_vec<uint8_t>* out) { |
Shawn Willden | c1d1fee | 2016-01-26 22:44:56 -0700 | [diff] [blame] | 403 | if (!checkBinderPermission(P_SIGN)) { |
Janis Danisevskis | c7a9fa2 | 2016-10-13 18:43:45 +0100 | [diff] [blame] | 404 | return ResponseCode::PERMISSION_DENIED; |
Shawn Willden | c1d1fee | 2016-01-26 22:44:56 -0700 | [diff] [blame] | 405 | } |
Janis Danisevskis | c7a9fa2 | 2016-10-13 18:43:45 +0100 | [diff] [blame] | 406 | return doLegacySignVerify(name, data, out, hidl_vec<uint8_t>(), KeyPurpose::SIGN); |
Shawn Willden | c1d1fee | 2016-01-26 22:44:56 -0700 | [diff] [blame] | 407 | } |
| 408 | |
Janis Danisevskis | c7a9fa2 | 2016-10-13 18:43:45 +0100 | [diff] [blame] | 409 | KeyStoreServiceReturnCode KeyStoreService::verify(const String16& name, |
| 410 | const hidl_vec<uint8_t>& data, |
| 411 | const hidl_vec<uint8_t>& signature) { |
Shawn Willden | c1d1fee | 2016-01-26 22:44:56 -0700 | [diff] [blame] | 412 | if (!checkBinderPermission(P_VERIFY)) { |
Janis Danisevskis | c7a9fa2 | 2016-10-13 18:43:45 +0100 | [diff] [blame] | 413 | return ResponseCode::PERMISSION_DENIED; |
Shawn Willden | c1d1fee | 2016-01-26 22:44:56 -0700 | [diff] [blame] | 414 | } |
Janis Danisevskis | c7a9fa2 | 2016-10-13 18:43:45 +0100 | [diff] [blame] | 415 | return doLegacySignVerify(name, data, nullptr, signature, KeyPurpose::VERIFY); |
Shawn Willden | c1d1fee | 2016-01-26 22:44:56 -0700 | [diff] [blame] | 416 | } |
| 417 | |
| 418 | /* |
| 419 | * TODO: The abstraction between things stored in hardware and regular blobs |
| 420 | * of data stored on the filesystem should be moved down to keystore itself. |
| 421 | * Unfortunately the Java code that calls this has naming conventions that it |
| 422 | * knows about. Ideally keystore shouldn't be used to store random blobs of |
| 423 | * data. |
| 424 | * |
| 425 | * Until that happens, it's necessary to have a separate "get_pubkey" and |
| 426 | * "del_key" since the Java code doesn't really communicate what it's |
| 427 | * intentions are. |
| 428 | */ |
Janis Danisevskis | c7a9fa2 | 2016-10-13 18:43:45 +0100 | [diff] [blame] | 429 | KeyStoreServiceReturnCode KeyStoreService::get_pubkey(const String16& name, |
| 430 | hidl_vec<uint8_t>* pubKey) { |
Shawn Willden | c1d1fee | 2016-01-26 22:44:56 -0700 | [diff] [blame] | 431 | ExportResult result; |
Janis Danisevskis | c7a9fa2 | 2016-10-13 18:43:45 +0100 | [diff] [blame] | 432 | exportKey(name, KeyFormat::X509, hidl_vec<uint8_t>(), hidl_vec<uint8_t>(), UID_SELF, &result); |
| 433 | if (!result.resultCode.isOk()) { |
| 434 | ALOGW("export failed: %d", int32_t(result.resultCode)); |
Shawn Willden | c1d1fee | 2016-01-26 22:44:56 -0700 | [diff] [blame] | 435 | return translateResultToLegacyResult(result.resultCode); |
| 436 | } |
| 437 | |
Janis Danisevskis | c7a9fa2 | 2016-10-13 18:43:45 +0100 | [diff] [blame] | 438 | if (pubKey) *pubKey = std::move(result.exportData); |
| 439 | return ResponseCode::NO_ERROR; |
Shawn Willden | c1d1fee | 2016-01-26 22:44:56 -0700 | [diff] [blame] | 440 | } |
| 441 | |
Janis Danisevskis | c7a9fa2 | 2016-10-13 18:43:45 +0100 | [diff] [blame] | 442 | KeyStoreServiceReturnCode KeyStoreService::grant(const String16& name, int32_t granteeUid) { |
Shawn Willden | c1d1fee | 2016-01-26 22:44:56 -0700 | [diff] [blame] | 443 | uid_t callingUid = IPCThreadState::self()->getCallingUid(); |
Janis Danisevskis | c7a9fa2 | 2016-10-13 18:43:45 +0100 | [diff] [blame] | 444 | auto result = checkBinderPermissionAndKeystoreState(P_GRANT); |
| 445 | if (!result.isOk()) { |
Shawn Willden | c1d1fee | 2016-01-26 22:44:56 -0700 | [diff] [blame] | 446 | return result; |
| 447 | } |
| 448 | |
| 449 | String8 name8(name); |
Tucker Sylvestro | 0ab28b7 | 2016-08-05 18:02:47 -0400 | [diff] [blame] | 450 | String8 filename(mKeyStore->getKeyNameForUidWithDir(name8, callingUid, ::TYPE_ANY)); |
Shawn Willden | c1d1fee | 2016-01-26 22:44:56 -0700 | [diff] [blame] | 451 | |
| 452 | if (access(filename.string(), R_OK) == -1) { |
Janis Danisevskis | c7a9fa2 | 2016-10-13 18:43:45 +0100 | [diff] [blame] | 453 | return (errno != ENOENT) ? ResponseCode::SYSTEM_ERROR : ResponseCode::KEY_NOT_FOUND; |
Shawn Willden | c1d1fee | 2016-01-26 22:44:56 -0700 | [diff] [blame] | 454 | } |
| 455 | |
| 456 | mKeyStore->addGrant(filename.string(), granteeUid); |
Janis Danisevskis | c7a9fa2 | 2016-10-13 18:43:45 +0100 | [diff] [blame] | 457 | return ResponseCode::NO_ERROR; |
Shawn Willden | c1d1fee | 2016-01-26 22:44:56 -0700 | [diff] [blame] | 458 | } |
| 459 | |
Janis Danisevskis | c7a9fa2 | 2016-10-13 18:43:45 +0100 | [diff] [blame] | 460 | KeyStoreServiceReturnCode KeyStoreService::ungrant(const String16& name, int32_t granteeUid) { |
Shawn Willden | c1d1fee | 2016-01-26 22:44:56 -0700 | [diff] [blame] | 461 | uid_t callingUid = IPCThreadState::self()->getCallingUid(); |
Janis Danisevskis | c7a9fa2 | 2016-10-13 18:43:45 +0100 | [diff] [blame] | 462 | auto result = checkBinderPermissionAndKeystoreState(P_GRANT); |
| 463 | if (!result.isOk()) { |
Shawn Willden | c1d1fee | 2016-01-26 22:44:56 -0700 | [diff] [blame] | 464 | return result; |
| 465 | } |
| 466 | |
| 467 | String8 name8(name); |
Tucker Sylvestro | 0ab28b7 | 2016-08-05 18:02:47 -0400 | [diff] [blame] | 468 | String8 filename(mKeyStore->getKeyNameForUidWithDir(name8, callingUid, ::TYPE_ANY)); |
Shawn Willden | c1d1fee | 2016-01-26 22:44:56 -0700 | [diff] [blame] | 469 | |
| 470 | if (access(filename.string(), R_OK) == -1) { |
Janis Danisevskis | c7a9fa2 | 2016-10-13 18:43:45 +0100 | [diff] [blame] | 471 | return (errno != ENOENT) ? ResponseCode::SYSTEM_ERROR : ResponseCode::KEY_NOT_FOUND; |
Shawn Willden | c1d1fee | 2016-01-26 22:44:56 -0700 | [diff] [blame] | 472 | } |
| 473 | |
Janis Danisevskis | c7a9fa2 | 2016-10-13 18:43:45 +0100 | [diff] [blame] | 474 | return mKeyStore->removeGrant(filename.string(), granteeUid) ? ResponseCode::NO_ERROR |
| 475 | : ResponseCode::KEY_NOT_FOUND; |
Shawn Willden | c1d1fee | 2016-01-26 22:44:56 -0700 | [diff] [blame] | 476 | } |
| 477 | |
| 478 | int64_t KeyStoreService::getmtime(const String16& name, int32_t uid) { |
| 479 | uid_t targetUid = getEffectiveUid(uid); |
| 480 | if (!checkBinderPermission(P_GET, targetUid)) { |
| 481 | ALOGW("permission denied for %d: getmtime", targetUid); |
| 482 | return -1L; |
| 483 | } |
| 484 | |
| 485 | String8 name8(name); |
Tucker Sylvestro | 0ab28b7 | 2016-08-05 18:02:47 -0400 | [diff] [blame] | 486 | String8 filename(mKeyStore->getKeyNameForUidWithDir(name8, targetUid, ::TYPE_ANY)); |
Shawn Willden | c1d1fee | 2016-01-26 22:44:56 -0700 | [diff] [blame] | 487 | |
| 488 | if (access(filename.string(), R_OK) == -1) { |
| 489 | ALOGW("could not access %s for getmtime", filename.string()); |
| 490 | return -1L; |
| 491 | } |
| 492 | |
| 493 | int fd = TEMP_FAILURE_RETRY(open(filename.string(), O_NOFOLLOW, O_RDONLY)); |
| 494 | if (fd < 0) { |
| 495 | ALOGW("could not open %s for getmtime", filename.string()); |
| 496 | return -1L; |
| 497 | } |
| 498 | |
| 499 | struct stat s; |
| 500 | int ret = fstat(fd, &s); |
| 501 | close(fd); |
| 502 | if (ret == -1) { |
| 503 | ALOGW("could not stat %s for getmtime", filename.string()); |
| 504 | return -1L; |
| 505 | } |
| 506 | |
| 507 | return static_cast<int64_t>(s.st_mtime); |
| 508 | } |
| 509 | |
Tucker Sylvestro | 0ab28b7 | 2016-08-05 18:02:47 -0400 | [diff] [blame] | 510 | // TODO(tuckeris): This is dead code, remove it. Don't bother copying over key characteristics here |
Janis Danisevskis | c7a9fa2 | 2016-10-13 18:43:45 +0100 | [diff] [blame] | 511 | KeyStoreServiceReturnCode KeyStoreService::duplicate(const String16& srcKey, int32_t srcUid, |
| 512 | const String16& destKey, int32_t destUid) { |
Shawn Willden | c1d1fee | 2016-01-26 22:44:56 -0700 | [diff] [blame] | 513 | uid_t callingUid = IPCThreadState::self()->getCallingUid(); |
| 514 | pid_t spid = IPCThreadState::self()->getCallingPid(); |
| 515 | if (!has_permission(callingUid, P_DUPLICATE, spid)) { |
| 516 | ALOGW("permission denied for %d: duplicate", callingUid); |
Janis Danisevskis | c7a9fa2 | 2016-10-13 18:43:45 +0100 | [diff] [blame] | 517 | return ResponseCode::PERMISSION_DENIED; |
Shawn Willden | c1d1fee | 2016-01-26 22:44:56 -0700 | [diff] [blame] | 518 | } |
| 519 | |
| 520 | State state = mKeyStore->getState(get_user_id(callingUid)); |
| 521 | if (!isKeystoreUnlocked(state)) { |
| 522 | ALOGD("calling duplicate in state: %d", state); |
Janis Danisevskis | c7a9fa2 | 2016-10-13 18:43:45 +0100 | [diff] [blame] | 523 | return ResponseCode(state); |
Shawn Willden | c1d1fee | 2016-01-26 22:44:56 -0700 | [diff] [blame] | 524 | } |
| 525 | |
| 526 | if (srcUid == -1 || static_cast<uid_t>(srcUid) == callingUid) { |
| 527 | srcUid = callingUid; |
| 528 | } else if (!is_granted_to(callingUid, srcUid)) { |
| 529 | ALOGD("migrate not granted from source: %d -> %d", callingUid, srcUid); |
Janis Danisevskis | c7a9fa2 | 2016-10-13 18:43:45 +0100 | [diff] [blame] | 530 | return ResponseCode::PERMISSION_DENIED; |
Shawn Willden | c1d1fee | 2016-01-26 22:44:56 -0700 | [diff] [blame] | 531 | } |
| 532 | |
| 533 | if (destUid == -1) { |
| 534 | destUid = callingUid; |
| 535 | } |
| 536 | |
| 537 | if (srcUid != destUid) { |
| 538 | if (static_cast<uid_t>(srcUid) != callingUid) { |
| 539 | ALOGD("can only duplicate from caller to other or to same uid: " |
| 540 | "calling=%d, srcUid=%d, destUid=%d", |
| 541 | callingUid, srcUid, destUid); |
Janis Danisevskis | c7a9fa2 | 2016-10-13 18:43:45 +0100 | [diff] [blame] | 542 | return ResponseCode::PERMISSION_DENIED; |
Shawn Willden | c1d1fee | 2016-01-26 22:44:56 -0700 | [diff] [blame] | 543 | } |
| 544 | |
| 545 | if (!is_granted_to(callingUid, destUid)) { |
| 546 | ALOGD("duplicate not granted to dest: %d -> %d", callingUid, destUid); |
Janis Danisevskis | c7a9fa2 | 2016-10-13 18:43:45 +0100 | [diff] [blame] | 547 | return ResponseCode::PERMISSION_DENIED; |
Shawn Willden | c1d1fee | 2016-01-26 22:44:56 -0700 | [diff] [blame] | 548 | } |
| 549 | } |
| 550 | |
| 551 | String8 source8(srcKey); |
Tucker Sylvestro | 0ab28b7 | 2016-08-05 18:02:47 -0400 | [diff] [blame] | 552 | String8 sourceFile(mKeyStore->getKeyNameForUidWithDir(source8, srcUid, ::TYPE_ANY)); |
Shawn Willden | c1d1fee | 2016-01-26 22:44:56 -0700 | [diff] [blame] | 553 | |
| 554 | String8 target8(destKey); |
Tucker Sylvestro | 0ab28b7 | 2016-08-05 18:02:47 -0400 | [diff] [blame] | 555 | String8 targetFile(mKeyStore->getKeyNameForUidWithDir(target8, destUid, ::TYPE_ANY)); |
Shawn Willden | c1d1fee | 2016-01-26 22:44:56 -0700 | [diff] [blame] | 556 | |
| 557 | if (access(targetFile.string(), W_OK) != -1 || errno != ENOENT) { |
| 558 | ALOGD("destination already exists: %s", targetFile.string()); |
Janis Danisevskis | c7a9fa2 | 2016-10-13 18:43:45 +0100 | [diff] [blame] | 559 | return ResponseCode::SYSTEM_ERROR; |
Shawn Willden | c1d1fee | 2016-01-26 22:44:56 -0700 | [diff] [blame] | 560 | } |
| 561 | |
| 562 | Blob keyBlob; |
| 563 | ResponseCode responseCode = |
| 564 | mKeyStore->get(sourceFile.string(), &keyBlob, TYPE_ANY, get_user_id(srcUid)); |
Janis Danisevskis | c7a9fa2 | 2016-10-13 18:43:45 +0100 | [diff] [blame] | 565 | if (responseCode != ResponseCode::NO_ERROR) { |
Shawn Willden | c1d1fee | 2016-01-26 22:44:56 -0700 | [diff] [blame] | 566 | return responseCode; |
| 567 | } |
| 568 | |
| 569 | return mKeyStore->put(targetFile.string(), &keyBlob, get_user_id(destUid)); |
| 570 | } |
| 571 | |
| 572 | int32_t KeyStoreService::is_hardware_backed(const String16& keyType) { |
| 573 | return mKeyStore->isHardwareBacked(keyType) ? 1 : 0; |
| 574 | } |
| 575 | |
Janis Danisevskis | c7a9fa2 | 2016-10-13 18:43:45 +0100 | [diff] [blame] | 576 | KeyStoreServiceReturnCode KeyStoreService::clear_uid(int64_t targetUid64) { |
Shawn Willden | c1d1fee | 2016-01-26 22:44:56 -0700 | [diff] [blame] | 577 | uid_t targetUid = getEffectiveUid(targetUid64); |
| 578 | if (!checkBinderPermissionSelfOrSystem(P_CLEAR_UID, targetUid)) { |
Janis Danisevskis | c7a9fa2 | 2016-10-13 18:43:45 +0100 | [diff] [blame] | 579 | return ResponseCode::PERMISSION_DENIED; |
Shawn Willden | c1d1fee | 2016-01-26 22:44:56 -0700 | [diff] [blame] | 580 | } |
| 581 | |
| 582 | String8 prefix = String8::format("%u_", targetUid); |
| 583 | Vector<String16> aliases; |
Janis Danisevskis | c7a9fa2 | 2016-10-13 18:43:45 +0100 | [diff] [blame] | 584 | if (mKeyStore->list(prefix, &aliases, get_user_id(targetUid)) != ResponseCode::NO_ERROR) { |
| 585 | return ResponseCode::SYSTEM_ERROR; |
Shawn Willden | c1d1fee | 2016-01-26 22:44:56 -0700 | [diff] [blame] | 586 | } |
| 587 | |
| 588 | for (uint32_t i = 0; i < aliases.size(); i++) { |
| 589 | String8 name8(aliases[i]); |
Tucker Sylvestro | 0ab28b7 | 2016-08-05 18:02:47 -0400 | [diff] [blame] | 590 | String8 filename(mKeyStore->getKeyNameForUidWithDir(name8, targetUid, ::TYPE_ANY)); |
Shawn Willden | c1d1fee | 2016-01-26 22:44:56 -0700 | [diff] [blame] | 591 | mKeyStore->del(filename.string(), ::TYPE_ANY, get_user_id(targetUid)); |
Tucker Sylvestro | 0ab28b7 | 2016-08-05 18:02:47 -0400 | [diff] [blame] | 592 | |
| 593 | // del() will fail silently if no cached characteristics are present for this alias. |
Janis Danisevskis | c7a9fa2 | 2016-10-13 18:43:45 +0100 | [diff] [blame] | 594 | String8 chr_filename( |
| 595 | mKeyStore->getKeyNameForUidWithDir(name8, targetUid, ::TYPE_KEY_CHARACTERISTICS)); |
Tucker Sylvestro | 0ab28b7 | 2016-08-05 18:02:47 -0400 | [diff] [blame] | 596 | mKeyStore->del(chr_filename.string(), ::TYPE_KEY_CHARACTERISTICS, get_user_id(targetUid)); |
Shawn Willden | c1d1fee | 2016-01-26 22:44:56 -0700 | [diff] [blame] | 597 | } |
Janis Danisevskis | c7a9fa2 | 2016-10-13 18:43:45 +0100 | [diff] [blame] | 598 | return ResponseCode::NO_ERROR; |
Shawn Willden | c1d1fee | 2016-01-26 22:44:56 -0700 | [diff] [blame] | 599 | } |
| 600 | |
Janis Danisevskis | c7a9fa2 | 2016-10-13 18:43:45 +0100 | [diff] [blame] | 601 | KeyStoreServiceReturnCode KeyStoreService::addRngEntropy(const hidl_vec<uint8_t>& entropy) { |
| 602 | const auto& device = mKeyStore->getDevice(); |
| 603 | return KS_HANDLE_HIDL_ERROR(device->addRngEntropy(entropy)); |
Shawn Willden | c1d1fee | 2016-01-26 22:44:56 -0700 | [diff] [blame] | 604 | } |
| 605 | |
Janis Danisevskis | c7a9fa2 | 2016-10-13 18:43:45 +0100 | [diff] [blame] | 606 | KeyStoreServiceReturnCode KeyStoreService::generateKey(const String16& name, |
| 607 | const hidl_vec<KeyParameter>& params, |
| 608 | const hidl_vec<uint8_t>& entropy, int uid, |
| 609 | int flags, |
| 610 | KeyCharacteristics* outCharacteristics) { |
Shawn Willden | c1d1fee | 2016-01-26 22:44:56 -0700 | [diff] [blame] | 611 | uid = getEffectiveUid(uid); |
Janis Danisevskis | c7a9fa2 | 2016-10-13 18:43:45 +0100 | [diff] [blame] | 612 | KeyStoreServiceReturnCode rc = |
| 613 | checkBinderPermissionAndKeystoreState(P_INSERT, uid, flags & KEYSTORE_FLAG_ENCRYPTED); |
| 614 | if (!rc.isOk()) { |
Shawn Willden | c1d1fee | 2016-01-26 22:44:56 -0700 | [diff] [blame] | 615 | return rc; |
| 616 | } |
| 617 | |
Janis Danisevskis | c7a9fa2 | 2016-10-13 18:43:45 +0100 | [diff] [blame] | 618 | bool usingFallback = false; |
| 619 | auto& dev = mKeyStore->getDevice(); |
| 620 | AuthorizationSet keyCharacteristics = params; |
Tucker Sylvestro | 0ab28b7 | 2016-08-05 18:02:47 -0400 | [diff] [blame] | 621 | |
Shawn Willden | c1d1fee | 2016-01-26 22:44:56 -0700 | [diff] [blame] | 622 | // TODO: Seed from Linux RNG before this. |
Janis Danisevskis | c7a9fa2 | 2016-10-13 18:43:45 +0100 | [diff] [blame] | 623 | rc = addRngEntropy(entropy); |
| 624 | if (!rc.isOk()) { |
Shawn Willden | c1d1fee | 2016-01-26 22:44:56 -0700 | [diff] [blame] | 625 | return rc; |
| 626 | } |
| 627 | |
Janis Danisevskis | c7a9fa2 | 2016-10-13 18:43:45 +0100 | [diff] [blame] | 628 | KeyStoreServiceReturnCode error; |
| 629 | auto hidl_cb = [&](ErrorCode ret, const hidl_vec<uint8_t>& hidlKeyBlob, |
| 630 | const KeyCharacteristics& keyCharacteristics) { |
| 631 | error = ret; |
| 632 | if (!error.isOk()) { |
| 633 | return; |
| 634 | } |
| 635 | if (outCharacteristics) *outCharacteristics = keyCharacteristics; |
Shawn Willden | c1d1fee | 2016-01-26 22:44:56 -0700 | [diff] [blame] | 636 | |
Janis Danisevskis | c7a9fa2 | 2016-10-13 18:43:45 +0100 | [diff] [blame] | 637 | // Write the key |
| 638 | String8 name8(name); |
| 639 | String8 filename(mKeyStore->getKeyNameForUidWithDir(name8, uid, ::TYPE_KEYMASTER_10)); |
Shawn Willden | c1d1fee | 2016-01-26 22:44:56 -0700 | [diff] [blame] | 640 | |
Janis Danisevskis | c7a9fa2 | 2016-10-13 18:43:45 +0100 | [diff] [blame] | 641 | Blob keyBlob(&hidlKeyBlob[0], hidlKeyBlob.size(), NULL, 0, ::TYPE_KEYMASTER_10); |
| 642 | keyBlob.setFallback(usingFallback); |
| 643 | keyBlob.setEncrypted(flags & KEYSTORE_FLAG_ENCRYPTED); |
Shawn Willden | c1d1fee | 2016-01-26 22:44:56 -0700 | [diff] [blame] | 644 | |
Janis Danisevskis | c7a9fa2 | 2016-10-13 18:43:45 +0100 | [diff] [blame] | 645 | error = mKeyStore->put(filename.string(), &keyBlob, get_user_id(uid)); |
| 646 | }; |
| 647 | |
| 648 | rc = KS_HANDLE_HIDL_ERROR(dev->generateKey(params, hidl_cb)); |
| 649 | if (!rc.isOk()) { |
Tucker Sylvestro | 0ab28b7 | 2016-08-05 18:02:47 -0400 | [diff] [blame] | 650 | return rc; |
| 651 | } |
Janis Danisevskis | c7a9fa2 | 2016-10-13 18:43:45 +0100 | [diff] [blame] | 652 | if (!error.isOk()) { |
| 653 | ALOGE("Failed to generate key -> falling back to software keymaster"); |
| 654 | usingFallback = true; |
Janis Danisevskis | e8ba180 | 2017-01-30 10:49:51 +0000 | [diff] [blame^] | 655 | auto fallback = mKeyStore->getFallbackDevice(); |
| 656 | if (!fallback.isOk()) { |
| 657 | return error; |
| 658 | } |
| 659 | rc = KS_HANDLE_HIDL_ERROR(fallback.value()->generateKey(params, hidl_cb)); |
Janis Danisevskis | c7a9fa2 | 2016-10-13 18:43:45 +0100 | [diff] [blame] | 660 | if (!rc.isOk()) { |
| 661 | return rc; |
| 662 | } |
| 663 | if (!error.isOk()) { |
| 664 | return error; |
| 665 | } |
| 666 | } |
Tucker Sylvestro | 0ab28b7 | 2016-08-05 18:02:47 -0400 | [diff] [blame] | 667 | |
| 668 | // Write the characteristics: |
Janis Danisevskis | c7a9fa2 | 2016-10-13 18:43:45 +0100 | [diff] [blame] | 669 | String8 name8(name); |
Tucker Sylvestro | 0ab28b7 | 2016-08-05 18:02:47 -0400 | [diff] [blame] | 670 | String8 cFilename(mKeyStore->getKeyNameForUidWithDir(name8, uid, ::TYPE_KEY_CHARACTERISTICS)); |
| 671 | |
Janis Danisevskis | c7a9fa2 | 2016-10-13 18:43:45 +0100 | [diff] [blame] | 672 | std::stringstream kc_stream; |
| 673 | keyCharacteristics.Serialize(&kc_stream); |
| 674 | if (kc_stream.bad()) { |
| 675 | return ResponseCode::SYSTEM_ERROR; |
| 676 | } |
| 677 | auto kc_buf = kc_stream.str(); |
| 678 | Blob charBlob(reinterpret_cast<const uint8_t*>(kc_buf.data()), kc_buf.size(), NULL, 0, |
| 679 | ::TYPE_KEY_CHARACTERISTICS); |
| 680 | charBlob.setFallback(usingFallback); |
Tucker Sylvestro | 0ab28b7 | 2016-08-05 18:02:47 -0400 | [diff] [blame] | 681 | charBlob.setEncrypted(flags & KEYSTORE_FLAG_ENCRYPTED); |
| 682 | |
| 683 | return mKeyStore->put(cFilename.string(), &charBlob, get_user_id(uid)); |
Shawn Willden | c1d1fee | 2016-01-26 22:44:56 -0700 | [diff] [blame] | 684 | } |
| 685 | |
Janis Danisevskis | c7a9fa2 | 2016-10-13 18:43:45 +0100 | [diff] [blame] | 686 | KeyStoreServiceReturnCode |
| 687 | KeyStoreService::getKeyCharacteristics(const String16& name, const hidl_vec<uint8_t>& clientId, |
| 688 | const hidl_vec<uint8_t>& appData, int32_t uid, |
| 689 | KeyCharacteristics* outCharacteristics) { |
Shawn Willden | c1d1fee | 2016-01-26 22:44:56 -0700 | [diff] [blame] | 690 | if (!outCharacteristics) { |
Janis Danisevskis | c7a9fa2 | 2016-10-13 18:43:45 +0100 | [diff] [blame] | 691 | return ErrorCode::UNEXPECTED_NULL_POINTER; |
Shawn Willden | c1d1fee | 2016-01-26 22:44:56 -0700 | [diff] [blame] | 692 | } |
| 693 | |
| 694 | uid_t targetUid = getEffectiveUid(uid); |
| 695 | uid_t callingUid = IPCThreadState::self()->getCallingUid(); |
| 696 | if (!is_granted_to(callingUid, targetUid)) { |
| 697 | ALOGW("uid %d not permitted to act for uid %d in getKeyCharacteristics", callingUid, |
| 698 | targetUid); |
Janis Danisevskis | c7a9fa2 | 2016-10-13 18:43:45 +0100 | [diff] [blame] | 699 | return ResponseCode::PERMISSION_DENIED; |
Shawn Willden | c1d1fee | 2016-01-26 22:44:56 -0700 | [diff] [blame] | 700 | } |
| 701 | |
| 702 | Blob keyBlob; |
| 703 | String8 name8(name); |
Shawn Willden | c1d1fee | 2016-01-26 22:44:56 -0700 | [diff] [blame] | 704 | |
Janis Danisevskis | c7a9fa2 | 2016-10-13 18:43:45 +0100 | [diff] [blame] | 705 | KeyStoreServiceReturnCode rc = |
Shawn Willden | c1d1fee | 2016-01-26 22:44:56 -0700 | [diff] [blame] | 706 | mKeyStore->getKeyForName(&keyBlob, name8, targetUid, TYPE_KEYMASTER_10); |
Janis Danisevskis | c7a9fa2 | 2016-10-13 18:43:45 +0100 | [diff] [blame] | 707 | if (!rc.isOk()) { |
| 708 | return rc; |
Shawn Willden | c1d1fee | 2016-01-26 22:44:56 -0700 | [diff] [blame] | 709 | } |
Janis Danisevskis | c7a9fa2 | 2016-10-13 18:43:45 +0100 | [diff] [blame] | 710 | |
| 711 | auto hidlKeyBlob = blob2hidlVec(keyBlob); |
| 712 | auto& dev = mKeyStore->getDevice(keyBlob); |
| 713 | |
| 714 | KeyStoreServiceReturnCode error; |
| 715 | |
| 716 | auto hidlCb = [&](ErrorCode ret, const KeyCharacteristics& keyCharacteristics) { |
| 717 | error = ret; |
| 718 | if (!error.isOk()) { |
| 719 | return; |
Shawn Willden | 98c5916 | 2016-03-20 09:10:18 -0600 | [diff] [blame] | 720 | } |
Janis Danisevskis | c7a9fa2 | 2016-10-13 18:43:45 +0100 | [diff] [blame] | 721 | *outCharacteristics = keyCharacteristics; |
| 722 | }; |
| 723 | |
| 724 | rc = KS_HANDLE_HIDL_ERROR(dev->getKeyCharacteristics(hidlKeyBlob, clientId, appData, hidlCb)); |
| 725 | if (!rc.isOk()) { |
| 726 | return rc; |
| 727 | } |
| 728 | |
| 729 | if (error == ErrorCode::KEY_REQUIRES_UPGRADE) { |
| 730 | AuthorizationSet upgradeParams; |
| 731 | if (clientId.size()) { |
| 732 | upgradeParams.push_back(TAG_APPLICATION_ID, clientId); |
| 733 | } |
| 734 | if (appData.size()) { |
| 735 | upgradeParams.push_back(TAG_APPLICATION_DATA, appData); |
Shawn Willden | 98c5916 | 2016-03-20 09:10:18 -0600 | [diff] [blame] | 736 | } |
| 737 | rc = upgradeKeyBlob(name, targetUid, upgradeParams, &keyBlob); |
Janis Danisevskis | c7a9fa2 | 2016-10-13 18:43:45 +0100 | [diff] [blame] | 738 | if (!rc.isOk()) { |
Shawn Willden | 98c5916 | 2016-03-20 09:10:18 -0600 | [diff] [blame] | 739 | return rc; |
| 740 | } |
Shawn Willden | 715d023 | 2016-01-21 00:45:13 -0700 | [diff] [blame] | 741 | |
Janis Danisevskis | c7a9fa2 | 2016-10-13 18:43:45 +0100 | [diff] [blame] | 742 | auto upgradedHidlKeyBlob = blob2hidlVec(keyBlob); |
| 743 | |
| 744 | rc = KS_HANDLE_HIDL_ERROR( |
| 745 | dev->getKeyCharacteristics(upgradedHidlKeyBlob, clientId, appData, hidlCb)); |
| 746 | if (!rc.isOk()) { |
| 747 | return rc; |
| 748 | } |
| 749 | // Note that, on success, "error" will have been updated by the hidlCB callback. |
| 750 | // So it is fine to return "error" below. |
| 751 | } |
| 752 | return error; |
Shawn Willden | c1d1fee | 2016-01-26 22:44:56 -0700 | [diff] [blame] | 753 | } |
| 754 | |
Janis Danisevskis | c7a9fa2 | 2016-10-13 18:43:45 +0100 | [diff] [blame] | 755 | KeyStoreServiceReturnCode |
| 756 | KeyStoreService::importKey(const String16& name, const hidl_vec<KeyParameter>& params, |
| 757 | KeyFormat format, const hidl_vec<uint8_t>& keyData, int uid, int flags, |
| 758 | KeyCharacteristics* outCharacteristics) { |
Shawn Willden | c1d1fee | 2016-01-26 22:44:56 -0700 | [diff] [blame] | 759 | uid = getEffectiveUid(uid); |
Janis Danisevskis | c7a9fa2 | 2016-10-13 18:43:45 +0100 | [diff] [blame] | 760 | KeyStoreServiceReturnCode rc = |
| 761 | checkBinderPermissionAndKeystoreState(P_INSERT, uid, flags & KEYSTORE_FLAG_ENCRYPTED); |
| 762 | if (!rc.isOk()) { |
Shawn Willden | c1d1fee | 2016-01-26 22:44:56 -0700 | [diff] [blame] | 763 | return rc; |
| 764 | } |
| 765 | |
Janis Danisevskis | c7a9fa2 | 2016-10-13 18:43:45 +0100 | [diff] [blame] | 766 | bool usingFallback = false; |
| 767 | auto& dev = mKeyStore->getDevice(); |
Shawn Willden | c1d1fee | 2016-01-26 22:44:56 -0700 | [diff] [blame] | 768 | |
Shawn Willden | c1d1fee | 2016-01-26 22:44:56 -0700 | [diff] [blame] | 769 | String8 name8(name); |
Shawn Willden | c1d1fee | 2016-01-26 22:44:56 -0700 | [diff] [blame] | 770 | |
Janis Danisevskis | c7a9fa2 | 2016-10-13 18:43:45 +0100 | [diff] [blame] | 771 | KeyStoreServiceReturnCode error; |
Shawn Willden | c1d1fee | 2016-01-26 22:44:56 -0700 | [diff] [blame] | 772 | |
Janis Danisevskis | c7a9fa2 | 2016-10-13 18:43:45 +0100 | [diff] [blame] | 773 | auto hidlCb = [&](ErrorCode ret, const hidl_vec<uint8_t>& keyBlob, |
| 774 | const KeyCharacteristics& keyCharacteristics) { |
| 775 | error = ret; |
| 776 | if (!error.isOk()) { |
| 777 | return; |
| 778 | } |
Shawn Willden | c1d1fee | 2016-01-26 22:44:56 -0700 | [diff] [blame] | 779 | |
Janis Danisevskis | c7a9fa2 | 2016-10-13 18:43:45 +0100 | [diff] [blame] | 780 | if (outCharacteristics) *outCharacteristics = keyCharacteristics; |
| 781 | |
| 782 | // Write the key: |
| 783 | String8 filename(mKeyStore->getKeyNameForUidWithDir(name8, uid, ::TYPE_KEYMASTER_10)); |
| 784 | |
| 785 | Blob ksBlob(&keyBlob[0], keyBlob.size(), NULL, 0, ::TYPE_KEYMASTER_10); |
| 786 | ksBlob.setFallback(usingFallback); |
| 787 | ksBlob.setEncrypted(flags & KEYSTORE_FLAG_ENCRYPTED); |
| 788 | |
| 789 | error = mKeyStore->put(filename.string(), &ksBlob, get_user_id(uid)); |
| 790 | }; |
| 791 | |
| 792 | rc = KS_HANDLE_HIDL_ERROR(dev->importKey(params, format, keyData, hidlCb)); |
| 793 | // possible hidl error |
| 794 | if (!rc.isOk()) { |
Tucker Sylvestro | 0ab28b7 | 2016-08-05 18:02:47 -0400 | [diff] [blame] | 795 | return rc; |
| 796 | } |
Janis Danisevskis | c7a9fa2 | 2016-10-13 18:43:45 +0100 | [diff] [blame] | 797 | // now check error from callback |
| 798 | if (!error.isOk()) { |
| 799 | ALOGE("Failed to import key -> falling back to software keymaster"); |
| 800 | usingFallback = true; |
Janis Danisevskis | e8ba180 | 2017-01-30 10:49:51 +0000 | [diff] [blame^] | 801 | auto fallback = mKeyStore->getFallbackDevice(); |
| 802 | if (!fallback.isOk()) { |
| 803 | return error; |
| 804 | } |
| 805 | rc = KS_HANDLE_HIDL_ERROR(fallback.value()->importKey(params, format, keyData, hidlCb)); |
Janis Danisevskis | c7a9fa2 | 2016-10-13 18:43:45 +0100 | [diff] [blame] | 806 | // possible hidl error |
| 807 | if (!rc.isOk()) { |
| 808 | return rc; |
| 809 | } |
| 810 | // now check error from callback |
| 811 | if (!error.isOk()) { |
| 812 | return error; |
| 813 | } |
| 814 | } |
Tucker Sylvestro | 0ab28b7 | 2016-08-05 18:02:47 -0400 | [diff] [blame] | 815 | |
| 816 | // Write the characteristics: |
| 817 | String8 cFilename(mKeyStore->getKeyNameForUidWithDir(name8, uid, ::TYPE_KEY_CHARACTERISTICS)); |
| 818 | |
Janis Danisevskis | c7a9fa2 | 2016-10-13 18:43:45 +0100 | [diff] [blame] | 819 | AuthorizationSet opParams = params; |
| 820 | std::stringstream kcStream; |
| 821 | opParams.Serialize(&kcStream); |
| 822 | if (kcStream.bad()) return ResponseCode::SYSTEM_ERROR; |
| 823 | auto kcBuf = kcStream.str(); |
| 824 | |
| 825 | Blob charBlob(reinterpret_cast<const uint8_t*>(kcBuf.data()), kcBuf.size(), NULL, 0, |
| 826 | ::TYPE_KEY_CHARACTERISTICS); |
| 827 | charBlob.setFallback(usingFallback); |
Tucker Sylvestro | 0ab28b7 | 2016-08-05 18:02:47 -0400 | [diff] [blame] | 828 | charBlob.setEncrypted(flags & KEYSTORE_FLAG_ENCRYPTED); |
| 829 | |
| 830 | return mKeyStore->put(cFilename.string(), &charBlob, get_user_id(uid)); |
Shawn Willden | c1d1fee | 2016-01-26 22:44:56 -0700 | [diff] [blame] | 831 | } |
| 832 | |
Janis Danisevskis | c7a9fa2 | 2016-10-13 18:43:45 +0100 | [diff] [blame] | 833 | void KeyStoreService::exportKey(const String16& name, KeyFormat format, |
| 834 | const hidl_vec<uint8_t>& clientId, const hidl_vec<uint8_t>& appData, |
Shawn Willden | c1d1fee | 2016-01-26 22:44:56 -0700 | [diff] [blame] | 835 | int32_t uid, ExportResult* result) { |
| 836 | |
| 837 | uid_t targetUid = getEffectiveUid(uid); |
| 838 | uid_t callingUid = IPCThreadState::self()->getCallingUid(); |
| 839 | if (!is_granted_to(callingUid, targetUid)) { |
| 840 | ALOGW("uid %d not permitted to act for uid %d in exportKey", callingUid, targetUid); |
Janis Danisevskis | c7a9fa2 | 2016-10-13 18:43:45 +0100 | [diff] [blame] | 841 | result->resultCode = ResponseCode::PERMISSION_DENIED; |
Shawn Willden | c1d1fee | 2016-01-26 22:44:56 -0700 | [diff] [blame] | 842 | return; |
| 843 | } |
| 844 | |
| 845 | Blob keyBlob; |
| 846 | String8 name8(name); |
Shawn Willden | c1d1fee | 2016-01-26 22:44:56 -0700 | [diff] [blame] | 847 | |
Janis Danisevskis | c7a9fa2 | 2016-10-13 18:43:45 +0100 | [diff] [blame] | 848 | result->resultCode = mKeyStore->getKeyForName(&keyBlob, name8, targetUid, TYPE_KEYMASTER_10); |
| 849 | if (!result->resultCode.isOk()) { |
Shawn Willden | c1d1fee | 2016-01-26 22:44:56 -0700 | [diff] [blame] | 850 | return; |
| 851 | } |
Janis Danisevskis | c7a9fa2 | 2016-10-13 18:43:45 +0100 | [diff] [blame] | 852 | |
| 853 | auto key = blob2hidlVec(keyBlob); |
| 854 | auto& dev = mKeyStore->getDevice(keyBlob); |
| 855 | |
| 856 | auto hidlCb = [&](ErrorCode ret, const ::android::hardware::hidl_vec<uint8_t>& keyMaterial) { |
| 857 | result->resultCode = ret; |
| 858 | if (!result->resultCode.isOk()) { |
Ji Wang | 2c14231 | 2016-10-14 17:21:10 +0800 | [diff] [blame] | 859 | return; |
| 860 | } |
Janis Danisevskis | c7a9fa2 | 2016-10-13 18:43:45 +0100 | [diff] [blame] | 861 | result->exportData = keyMaterial; |
| 862 | }; |
| 863 | KeyStoreServiceReturnCode rc = |
| 864 | KS_HANDLE_HIDL_ERROR(dev->exportKey(format, key, clientId, appData, hidlCb)); |
| 865 | // Overwrite result->resultCode only on HIDL error. Otherwise we want the result set in the |
| 866 | // callback hidlCb. |
| 867 | if (!rc.isOk()) { |
| 868 | result->resultCode = rc; |
Ji Wang | 2c14231 | 2016-10-14 17:21:10 +0800 | [diff] [blame] | 869 | } |
| 870 | |
Janis Danisevskis | c7a9fa2 | 2016-10-13 18:43:45 +0100 | [diff] [blame] | 871 | if (result->resultCode == ErrorCode::KEY_REQUIRES_UPGRADE) { |
| 872 | AuthorizationSet upgradeParams; |
| 873 | if (clientId.size()) { |
| 874 | upgradeParams.push_back(TAG_APPLICATION_ID, clientId); |
| 875 | } |
| 876 | if (appData.size()) { |
| 877 | upgradeParams.push_back(TAG_APPLICATION_DATA, appData); |
| 878 | } |
| 879 | result->resultCode = upgradeKeyBlob(name, targetUid, upgradeParams, &keyBlob); |
| 880 | if (!result->resultCode.isOk()) { |
| 881 | return; |
| 882 | } |
| 883 | |
| 884 | auto upgradedHidlKeyBlob = blob2hidlVec(keyBlob); |
| 885 | |
| 886 | result->resultCode = KS_HANDLE_HIDL_ERROR( |
| 887 | dev->exportKey(format, upgradedHidlKeyBlob, clientId, appData, hidlCb)); |
| 888 | if (!result->resultCode.isOk()) { |
| 889 | return; |
| 890 | } |
| 891 | } |
Shawn Willden | c1d1fee | 2016-01-26 22:44:56 -0700 | [diff] [blame] | 892 | } |
| 893 | |
Janis Danisevskis | c7a9fa2 | 2016-10-13 18:43:45 +0100 | [diff] [blame] | 894 | static inline void addAuthTokenToParams(AuthorizationSet* params, const HardwareAuthToken* token) { |
| 895 | if (token) { |
| 896 | params->push_back(TAG_AUTH_TOKEN, authToken2HidlVec(*token)); |
| 897 | } |
| 898 | } |
| 899 | |
| 900 | void KeyStoreService::begin(const sp<IBinder>& appToken, const String16& name, KeyPurpose purpose, |
| 901 | bool pruneable, const hidl_vec<KeyParameter>& params, |
| 902 | const hidl_vec<uint8_t>& entropy, int32_t uid, |
| 903 | OperationResult* result) { |
Shawn Willden | c1d1fee | 2016-01-26 22:44:56 -0700 | [diff] [blame] | 904 | uid_t callingUid = IPCThreadState::self()->getCallingUid(); |
| 905 | uid_t targetUid = getEffectiveUid(uid); |
| 906 | if (!is_granted_to(callingUid, targetUid)) { |
| 907 | ALOGW("uid %d not permitted to act for uid %d in begin", callingUid, targetUid); |
Janis Danisevskis | c7a9fa2 | 2016-10-13 18:43:45 +0100 | [diff] [blame] | 908 | result->resultCode = ResponseCode::PERMISSION_DENIED; |
Shawn Willden | c1d1fee | 2016-01-26 22:44:56 -0700 | [diff] [blame] | 909 | return; |
| 910 | } |
| 911 | if (!pruneable && get_app_id(callingUid) != AID_SYSTEM) { |
| 912 | ALOGE("Non-system uid %d trying to start non-pruneable operation", callingUid); |
Janis Danisevskis | c7a9fa2 | 2016-10-13 18:43:45 +0100 | [diff] [blame] | 913 | result->resultCode = ResponseCode::PERMISSION_DENIED; |
Shawn Willden | c1d1fee | 2016-01-26 22:44:56 -0700 | [diff] [blame] | 914 | return; |
| 915 | } |
Janis Danisevskis | c7a9fa2 | 2016-10-13 18:43:45 +0100 | [diff] [blame] | 916 | if (!checkAllowedOperationParams(params)) { |
| 917 | result->resultCode = ErrorCode::INVALID_ARGUMENT; |
Shawn Willden | c1d1fee | 2016-01-26 22:44:56 -0700 | [diff] [blame] | 918 | return; |
| 919 | } |
| 920 | Blob keyBlob; |
| 921 | String8 name8(name); |
Janis Danisevskis | c7a9fa2 | 2016-10-13 18:43:45 +0100 | [diff] [blame] | 922 | result->resultCode = mKeyStore->getKeyForName(&keyBlob, name8, targetUid, TYPE_KEYMASTER_10); |
| 923 | if (!result->resultCode.isOk()) { |
Shawn Willden | c1d1fee | 2016-01-26 22:44:56 -0700 | [diff] [blame] | 924 | return; |
| 925 | } |
Janis Danisevskis | c7a9fa2 | 2016-10-13 18:43:45 +0100 | [diff] [blame] | 926 | |
| 927 | auto key = blob2hidlVec(keyBlob); |
| 928 | auto& dev = mKeyStore->getDevice(keyBlob); |
| 929 | AuthorizationSet opParams = params; |
| 930 | KeyCharacteristics characteristics; |
| 931 | result->resultCode = getOperationCharacteristics(key, &dev, opParams, &characteristics); |
| 932 | |
| 933 | if (result->resultCode == ErrorCode::KEY_REQUIRES_UPGRADE) { |
| 934 | result->resultCode = upgradeKeyBlob(name, targetUid, opParams, &keyBlob); |
| 935 | if (!result->resultCode.isOk()) { |
Shawn Willden | 98c5916 | 2016-03-20 09:10:18 -0600 | [diff] [blame] | 936 | return; |
| 937 | } |
Janis Danisevskis | c7a9fa2 | 2016-10-13 18:43:45 +0100 | [diff] [blame] | 938 | key = blob2hidlVec(keyBlob); |
| 939 | result->resultCode = getOperationCharacteristics(key, &dev, opParams, &characteristics); |
Shawn Willden | 98c5916 | 2016-03-20 09:10:18 -0600 | [diff] [blame] | 940 | } |
Janis Danisevskis | c7a9fa2 | 2016-10-13 18:43:45 +0100 | [diff] [blame] | 941 | if (!result->resultCode.isOk()) { |
Shawn Willden | c1d1fee | 2016-01-26 22:44:56 -0700 | [diff] [blame] | 942 | return; |
| 943 | } |
Janis Danisevskis | c7a9fa2 | 2016-10-13 18:43:45 +0100 | [diff] [blame] | 944 | |
| 945 | const HardwareAuthToken* authToken = NULL; |
Tucker Sylvestro | 0ab28b7 | 2016-08-05 18:02:47 -0400 | [diff] [blame] | 946 | |
| 947 | // Merge these characteristics with the ones cached when the key was generated or imported |
| 948 | Blob charBlob; |
| 949 | AuthorizationSet persistedCharacteristics; |
Janis Danisevskis | c7a9fa2 | 2016-10-13 18:43:45 +0100 | [diff] [blame] | 950 | result->resultCode = |
| 951 | mKeyStore->getKeyForName(&charBlob, name8, targetUid, TYPE_KEY_CHARACTERISTICS); |
| 952 | if (result->resultCode.isOk()) { |
| 953 | // TODO write one shot stream buffer to avoid copying (twice here) |
| 954 | std::string charBuffer(reinterpret_cast<const char*>(charBlob.getValue()), |
| 955 | charBlob.getLength()); |
| 956 | std::stringstream charStream(charBuffer); |
| 957 | persistedCharacteristics.Deserialize(&charStream); |
Tucker Sylvestro | 0ab28b7 | 2016-08-05 18:02:47 -0400 | [diff] [blame] | 958 | } else { |
| 959 | ALOGD("Unable to read cached characteristics for key"); |
| 960 | } |
| 961 | |
| 962 | // Replace the sw_enforced set with those persisted to disk, minus hw_enforced |
Janis Danisevskis | c7a9fa2 | 2016-10-13 18:43:45 +0100 | [diff] [blame] | 963 | AuthorizationSet softwareEnforced = characteristics.softwareEnforced; |
| 964 | AuthorizationSet teeEnforced = characteristics.teeEnforced; |
| 965 | persistedCharacteristics.Union(softwareEnforced); |
| 966 | persistedCharacteristics.Subtract(teeEnforced); |
| 967 | characteristics.softwareEnforced = persistedCharacteristics.hidl_data(); |
Tucker Sylvestro | 0ab28b7 | 2016-08-05 18:02:47 -0400 | [diff] [blame] | 968 | |
Janis Danisevskis | c7a9fa2 | 2016-10-13 18:43:45 +0100 | [diff] [blame] | 969 | result->resultCode = getAuthToken(characteristics, 0, purpose, &authToken, |
Shawn Willden | c1d1fee | 2016-01-26 22:44:56 -0700 | [diff] [blame] | 970 | /*failOnTokenMissing*/ false); |
| 971 | // If per-operation auth is needed we need to begin the operation and |
| 972 | // the client will need to authorize that operation before calling |
| 973 | // update. Any other auth issues stop here. |
Janis Danisevskis | c7a9fa2 | 2016-10-13 18:43:45 +0100 | [diff] [blame] | 974 | if (!result->resultCode.isOk() && result->resultCode != ResponseCode::OP_AUTH_NEEDED) return; |
| 975 | |
| 976 | addAuthTokenToParams(&opParams, authToken); |
| 977 | |
Shawn Willden | c1d1fee | 2016-01-26 22:44:56 -0700 | [diff] [blame] | 978 | // Add entropy to the device first. |
Janis Danisevskis | c7a9fa2 | 2016-10-13 18:43:45 +0100 | [diff] [blame] | 979 | if (entropy.size()) { |
| 980 | result->resultCode = addRngEntropy(entropy); |
| 981 | if (!result->resultCode.isOk()) { |
Shawn Willden | c1d1fee | 2016-01-26 22:44:56 -0700 | [diff] [blame] | 982 | return; |
| 983 | } |
| 984 | } |
Shawn Willden | c1d1fee | 2016-01-26 22:44:56 -0700 | [diff] [blame] | 985 | |
| 986 | // Create a keyid for this key. |
Janis Danisevskis | c7a9fa2 | 2016-10-13 18:43:45 +0100 | [diff] [blame] | 987 | km_id_t keyid; |
Shawn Willden | c1d1fee | 2016-01-26 22:44:56 -0700 | [diff] [blame] | 988 | if (!enforcement_policy.CreateKeyId(key, &keyid)) { |
| 989 | ALOGE("Failed to create a key ID for authorization checking."); |
Janis Danisevskis | c7a9fa2 | 2016-10-13 18:43:45 +0100 | [diff] [blame] | 990 | result->resultCode = ErrorCode::UNKNOWN_ERROR; |
Shawn Willden | c1d1fee | 2016-01-26 22:44:56 -0700 | [diff] [blame] | 991 | return; |
| 992 | } |
| 993 | |
| 994 | // Check that all key authorization policy requirements are met. |
Janis Danisevskis | c7a9fa2 | 2016-10-13 18:43:45 +0100 | [diff] [blame] | 995 | AuthorizationSet key_auths = characteristics.teeEnforced; |
| 996 | key_auths.append(&characteristics.softwareEnforced[0], |
| 997 | &characteristics.softwareEnforced[characteristics.softwareEnforced.size()]); |
| 998 | |
| 999 | result->resultCode = enforcement_policy.AuthorizeOperation( |
| 1000 | purpose, keyid, key_auths, opParams, 0 /* op_handle */, true /* is_begin_operation */); |
| 1001 | if (!result->resultCode.isOk()) { |
Shawn Willden | c1d1fee | 2016-01-26 22:44:56 -0700 | [diff] [blame] | 1002 | return; |
| 1003 | } |
| 1004 | |
Shawn Willden | c1d1fee | 2016-01-26 22:44:56 -0700 | [diff] [blame] | 1005 | // If there are more than MAX_OPERATIONS, abort the oldest operation that was started as |
| 1006 | // pruneable. |
| 1007 | while (mOperationMap.getOperationCount() >= MAX_OPERATIONS) { |
| 1008 | ALOGD("Reached or exceeded concurrent operations limit"); |
| 1009 | if (!pruneOperation()) { |
| 1010 | break; |
| 1011 | } |
| 1012 | } |
| 1013 | |
Janis Danisevskis | c7a9fa2 | 2016-10-13 18:43:45 +0100 | [diff] [blame] | 1014 | auto hidlCb = [&](ErrorCode ret, const hidl_vec<KeyParameter>& outParams, |
| 1015 | uint64_t operationHandle) { |
| 1016 | result->resultCode = ret; |
| 1017 | if (!result->resultCode.isOk()) { |
| 1018 | return; |
| 1019 | } |
| 1020 | result->handle = operationHandle; |
| 1021 | result->outParams = outParams; |
| 1022 | }; |
| 1023 | |
| 1024 | ErrorCode rc = KS_HANDLE_HIDL_ERROR(dev->begin(purpose, key, opParams.hidl_data(), hidlCb)); |
| 1025 | if (rc != ErrorCode::OK) { |
| 1026 | ALOGW("Got error %d from begin()", rc); |
Shawn Willden | c1d1fee | 2016-01-26 22:44:56 -0700 | [diff] [blame] | 1027 | } |
| 1028 | |
| 1029 | // If there are too many operations abort the oldest operation that was |
| 1030 | // started as pruneable and try again. |
Janis Danisevskis | c7a9fa2 | 2016-10-13 18:43:45 +0100 | [diff] [blame] | 1031 | while (rc == ErrorCode::TOO_MANY_OPERATIONS && mOperationMap.hasPruneableOperation()) { |
| 1032 | ALOGW("Ran out of operation handles"); |
Shawn Willden | c1d1fee | 2016-01-26 22:44:56 -0700 | [diff] [blame] | 1033 | if (!pruneOperation()) { |
| 1034 | break; |
| 1035 | } |
Janis Danisevskis | c7a9fa2 | 2016-10-13 18:43:45 +0100 | [diff] [blame] | 1036 | rc = KS_HANDLE_HIDL_ERROR(dev->begin(purpose, key, opParams.hidl_data(), hidlCb)); |
Shawn Willden | c1d1fee | 2016-01-26 22:44:56 -0700 | [diff] [blame] | 1037 | } |
Janis Danisevskis | c7a9fa2 | 2016-10-13 18:43:45 +0100 | [diff] [blame] | 1038 | if (rc != ErrorCode::OK) { |
| 1039 | result->resultCode = rc; |
Shawn Willden | c1d1fee | 2016-01-26 22:44:56 -0700 | [diff] [blame] | 1040 | return; |
| 1041 | } |
| 1042 | |
Janis Danisevskis | c7a9fa2 | 2016-10-13 18:43:45 +0100 | [diff] [blame] | 1043 | // Note: The operation map takes possession of the contents of "characteristics". |
| 1044 | // It is safe to use characteristics after the following line but it will be empty. |
| 1045 | sp<IBinder> operationToken = mOperationMap.addOperation( |
| 1046 | result->handle, keyid, purpose, dev, appToken, std::move(characteristics), pruneable); |
| 1047 | assert(characteristics.teeEnforced.size() == 0); |
| 1048 | assert(characteristics.softwareEnforced.size() == 0); |
| 1049 | |
Shawn Willden | c1d1fee | 2016-01-26 22:44:56 -0700 | [diff] [blame] | 1050 | if (authToken) { |
| 1051 | mOperationMap.setOperationAuthToken(operationToken, authToken); |
| 1052 | } |
| 1053 | // Return the authentication lookup result. If this is a per operation |
| 1054 | // auth'd key then the resultCode will be ::OP_AUTH_NEEDED and the |
| 1055 | // application should get an auth token using the handle before the |
| 1056 | // first call to update, which will fail if keystore hasn't received the |
| 1057 | // auth token. |
Janis Danisevskis | c7a9fa2 | 2016-10-13 18:43:45 +0100 | [diff] [blame] | 1058 | // All fields but "token" were set in the begin operation's callback. |
Shawn Willden | c1d1fee | 2016-01-26 22:44:56 -0700 | [diff] [blame] | 1059 | result->token = operationToken; |
Shawn Willden | c1d1fee | 2016-01-26 22:44:56 -0700 | [diff] [blame] | 1060 | } |
| 1061 | |
Janis Danisevskis | c7a9fa2 | 2016-10-13 18:43:45 +0100 | [diff] [blame] | 1062 | void KeyStoreService::update(const sp<IBinder>& token, const hidl_vec<KeyParameter>& params, |
| 1063 | const hidl_vec<uint8_t>& data, OperationResult* result) { |
| 1064 | if (!checkAllowedOperationParams(params)) { |
| 1065 | result->resultCode = ErrorCode::INVALID_ARGUMENT; |
Shawn Willden | c1d1fee | 2016-01-26 22:44:56 -0700 | [diff] [blame] | 1066 | return; |
| 1067 | } |
Janis Danisevskis | c7a9fa2 | 2016-10-13 18:43:45 +0100 | [diff] [blame] | 1068 | km_device_t dev; |
| 1069 | uint64_t handle; |
| 1070 | KeyPurpose purpose; |
| 1071 | km_id_t keyid; |
| 1072 | const KeyCharacteristics* characteristics; |
Shawn Willden | c1d1fee | 2016-01-26 22:44:56 -0700 | [diff] [blame] | 1073 | if (!mOperationMap.getOperation(token, &handle, &keyid, &purpose, &dev, &characteristics)) { |
Janis Danisevskis | c7a9fa2 | 2016-10-13 18:43:45 +0100 | [diff] [blame] | 1074 | result->resultCode = ErrorCode::INVALID_OPERATION_HANDLE; |
Shawn Willden | c1d1fee | 2016-01-26 22:44:56 -0700 | [diff] [blame] | 1075 | return; |
| 1076 | } |
Janis Danisevskis | c7a9fa2 | 2016-10-13 18:43:45 +0100 | [diff] [blame] | 1077 | AuthorizationSet opParams = params; |
| 1078 | result->resultCode = addOperationAuthTokenIfNeeded(token, &opParams); |
| 1079 | if (!result->resultCode.isOk()) { |
Shawn Willden | c1d1fee | 2016-01-26 22:44:56 -0700 | [diff] [blame] | 1080 | return; |
| 1081 | } |
Shawn Willden | c1d1fee | 2016-01-26 22:44:56 -0700 | [diff] [blame] | 1082 | |
| 1083 | // Check that all key authorization policy requirements are met. |
Janis Danisevskis | c7a9fa2 | 2016-10-13 18:43:45 +0100 | [diff] [blame] | 1084 | AuthorizationSet key_auths(characteristics->teeEnforced); |
| 1085 | key_auths.append(&characteristics->softwareEnforced[0], |
| 1086 | &characteristics->softwareEnforced[characteristics->softwareEnforced.size()]); |
Shawn Willden | c1d1fee | 2016-01-26 22:44:56 -0700 | [diff] [blame] | 1087 | result->resultCode = enforcement_policy.AuthorizeOperation( |
Janis Danisevskis | c7a9fa2 | 2016-10-13 18:43:45 +0100 | [diff] [blame] | 1088 | purpose, keyid, key_auths, opParams, handle, false /* is_begin_operation */); |
| 1089 | if (!result->resultCode.isOk()) { |
Shawn Willden | c1d1fee | 2016-01-26 22:44:56 -0700 | [diff] [blame] | 1090 | return; |
| 1091 | } |
| 1092 | |
Janis Danisevskis | c7a9fa2 | 2016-10-13 18:43:45 +0100 | [diff] [blame] | 1093 | auto hidlCb = [&](ErrorCode ret, uint32_t inputConsumed, |
| 1094 | const hidl_vec<KeyParameter>& outParams, const hidl_vec<uint8_t>& output) { |
| 1095 | result->resultCode = ret; |
| 1096 | if (!result->resultCode.isOk()) { |
| 1097 | return; |
| 1098 | } |
| 1099 | result->inputConsumed = inputConsumed; |
| 1100 | result->outParams = outParams; |
| 1101 | result->data = output; |
| 1102 | }; |
| 1103 | |
Janis Danisevskis | b0245ee | 2017-01-25 15:43:01 +0000 | [diff] [blame] | 1104 | KeyStoreServiceReturnCode rc = KS_HANDLE_HIDL_ERROR(dev->update(handle, opParams.hidl_data(), |
| 1105 | data, hidlCb)); |
Janis Danisevskis | c7a9fa2 | 2016-10-13 18:43:45 +0100 | [diff] [blame] | 1106 | // just a reminder: on success result->resultCode was set in the callback. So we only overwrite |
| 1107 | // it if there was a communication error indicated by the ErrorCode. |
| 1108 | if (!rc.isOk()) { |
| 1109 | result->resultCode = rc; |
Shawn Willden | c1d1fee | 2016-01-26 22:44:56 -0700 | [diff] [blame] | 1110 | } |
| 1111 | } |
| 1112 | |
Janis Danisevskis | c7a9fa2 | 2016-10-13 18:43:45 +0100 | [diff] [blame] | 1113 | void KeyStoreService::finish(const sp<IBinder>& token, const hidl_vec<KeyParameter>& params, |
| 1114 | const hidl_vec<uint8_t>& signature, const hidl_vec<uint8_t>& entropy, |
Shawn Willden | c1d1fee | 2016-01-26 22:44:56 -0700 | [diff] [blame] | 1115 | OperationResult* result) { |
Janis Danisevskis | c7a9fa2 | 2016-10-13 18:43:45 +0100 | [diff] [blame] | 1116 | if (!checkAllowedOperationParams(params)) { |
| 1117 | result->resultCode = ErrorCode::INVALID_ARGUMENT; |
Shawn Willden | c1d1fee | 2016-01-26 22:44:56 -0700 | [diff] [blame] | 1118 | return; |
| 1119 | } |
Janis Danisevskis | c7a9fa2 | 2016-10-13 18:43:45 +0100 | [diff] [blame] | 1120 | km_device_t dev; |
| 1121 | uint64_t handle; |
| 1122 | KeyPurpose purpose; |
| 1123 | km_id_t keyid; |
| 1124 | const KeyCharacteristics* characteristics; |
Shawn Willden | c1d1fee | 2016-01-26 22:44:56 -0700 | [diff] [blame] | 1125 | if (!mOperationMap.getOperation(token, &handle, &keyid, &purpose, &dev, &characteristics)) { |
Janis Danisevskis | c7a9fa2 | 2016-10-13 18:43:45 +0100 | [diff] [blame] | 1126 | result->resultCode = ErrorCode::INVALID_OPERATION_HANDLE; |
Shawn Willden | c1d1fee | 2016-01-26 22:44:56 -0700 | [diff] [blame] | 1127 | return; |
| 1128 | } |
Janis Danisevskis | c7a9fa2 | 2016-10-13 18:43:45 +0100 | [diff] [blame] | 1129 | AuthorizationSet opParams = params; |
| 1130 | result->resultCode = addOperationAuthTokenIfNeeded(token, &opParams); |
| 1131 | if (!result->resultCode.isOk()) { |
Shawn Willden | c1d1fee | 2016-01-26 22:44:56 -0700 | [diff] [blame] | 1132 | return; |
| 1133 | } |
Janis Danisevskis | c7a9fa2 | 2016-10-13 18:43:45 +0100 | [diff] [blame] | 1134 | |
| 1135 | if (entropy.size()) { |
| 1136 | result->resultCode = addRngEntropy(entropy); |
| 1137 | if (!result->resultCode.isOk()) { |
Shawn Willden | c1d1fee | 2016-01-26 22:44:56 -0700 | [diff] [blame] | 1138 | return; |
| 1139 | } |
| 1140 | } |
| 1141 | |
Shawn Willden | c1d1fee | 2016-01-26 22:44:56 -0700 | [diff] [blame] | 1142 | // Check that all key authorization policy requirements are met. |
Janis Danisevskis | c7a9fa2 | 2016-10-13 18:43:45 +0100 | [diff] [blame] | 1143 | AuthorizationSet key_auths(characteristics->teeEnforced); |
| 1144 | key_auths.append(&characteristics->softwareEnforced[0], |
| 1145 | &characteristics->softwareEnforced[characteristics->softwareEnforced.size()]); |
| 1146 | result->resultCode = enforcement_policy.AuthorizeOperation( |
| 1147 | purpose, keyid, key_auths, opParams, handle, false /* is_begin_operation */); |
| 1148 | if (!result->resultCode.isOk()) return; |
Shawn Willden | c1d1fee | 2016-01-26 22:44:56 -0700 | [diff] [blame] | 1149 | |
Janis Danisevskis | c7a9fa2 | 2016-10-13 18:43:45 +0100 | [diff] [blame] | 1150 | auto hidlCb = [&](ErrorCode ret, const hidl_vec<KeyParameter>& outParams, |
| 1151 | const hidl_vec<uint8_t>& output) { |
| 1152 | result->resultCode = ret; |
| 1153 | if (!result->resultCode.isOk()) { |
| 1154 | return; |
| 1155 | } |
| 1156 | result->outParams = outParams; |
| 1157 | result->data = output; |
| 1158 | }; |
| 1159 | |
| 1160 | KeyStoreServiceReturnCode rc = KS_HANDLE_HIDL_ERROR(dev->finish( |
| 1161 | handle, opParams.hidl_data(), |
| 1162 | hidl_vec<uint8_t>() /* TODO(swillden): wire up input to finish() */, signature, hidlCb)); |
Shawn Willden | c1d1fee | 2016-01-26 22:44:56 -0700 | [diff] [blame] | 1163 | // Remove the operation regardless of the result |
| 1164 | mOperationMap.removeOperation(token); |
| 1165 | mAuthTokenTable.MarkCompleted(handle); |
| 1166 | |
Janis Danisevskis | c7a9fa2 | 2016-10-13 18:43:45 +0100 | [diff] [blame] | 1167 | // just a reminder: on success result->resultCode was set in the callback. So we only overwrite |
| 1168 | // it if there was a communication error indicated by the ErrorCode. |
| 1169 | if (!rc.isOk()) { |
| 1170 | result->resultCode = rc; |
Shawn Willden | c1d1fee | 2016-01-26 22:44:56 -0700 | [diff] [blame] | 1171 | } |
| 1172 | } |
| 1173 | |
Janis Danisevskis | c7a9fa2 | 2016-10-13 18:43:45 +0100 | [diff] [blame] | 1174 | KeyStoreServiceReturnCode KeyStoreService::abort(const sp<IBinder>& token) { |
| 1175 | km_device_t dev; |
| 1176 | uint64_t handle; |
| 1177 | KeyPurpose purpose; |
| 1178 | km_id_t keyid; |
Shawn Willden | c1d1fee | 2016-01-26 22:44:56 -0700 | [diff] [blame] | 1179 | if (!mOperationMap.getOperation(token, &handle, &keyid, &purpose, &dev, NULL)) { |
Janis Danisevskis | c7a9fa2 | 2016-10-13 18:43:45 +0100 | [diff] [blame] | 1180 | return ErrorCode::INVALID_OPERATION_HANDLE; |
Shawn Willden | c1d1fee | 2016-01-26 22:44:56 -0700 | [diff] [blame] | 1181 | } |
| 1182 | mOperationMap.removeOperation(token); |
Janis Danisevskis | c7a9fa2 | 2016-10-13 18:43:45 +0100 | [diff] [blame] | 1183 | |
| 1184 | ErrorCode rc = KS_HANDLE_HIDL_ERROR(dev->abort(handle)); |
Shawn Willden | c1d1fee | 2016-01-26 22:44:56 -0700 | [diff] [blame] | 1185 | mAuthTokenTable.MarkCompleted(handle); |
Janis Danisevskis | c7a9fa2 | 2016-10-13 18:43:45 +0100 | [diff] [blame] | 1186 | return rc; |
Shawn Willden | c1d1fee | 2016-01-26 22:44:56 -0700 | [diff] [blame] | 1187 | } |
| 1188 | |
| 1189 | bool KeyStoreService::isOperationAuthorized(const sp<IBinder>& token) { |
Janis Danisevskis | c7a9fa2 | 2016-10-13 18:43:45 +0100 | [diff] [blame] | 1190 | km_device_t dev; |
| 1191 | uint64_t handle; |
| 1192 | const KeyCharacteristics* characteristics; |
| 1193 | KeyPurpose purpose; |
| 1194 | km_id_t keyid; |
Shawn Willden | c1d1fee | 2016-01-26 22:44:56 -0700 | [diff] [blame] | 1195 | if (!mOperationMap.getOperation(token, &handle, &keyid, &purpose, &dev, &characteristics)) { |
| 1196 | return false; |
| 1197 | } |
Janis Danisevskis | c7a9fa2 | 2016-10-13 18:43:45 +0100 | [diff] [blame] | 1198 | const HardwareAuthToken* authToken = NULL; |
Shawn Willden | c1d1fee | 2016-01-26 22:44:56 -0700 | [diff] [blame] | 1199 | mOperationMap.getOperationAuthToken(token, &authToken); |
Janis Danisevskis | c7a9fa2 | 2016-10-13 18:43:45 +0100 | [diff] [blame] | 1200 | AuthorizationSet ignored; |
| 1201 | auto authResult = addOperationAuthTokenIfNeeded(token, &ignored); |
| 1202 | return authResult.isOk(); |
Shawn Willden | c1d1fee | 2016-01-26 22:44:56 -0700 | [diff] [blame] | 1203 | } |
| 1204 | |
Janis Danisevskis | c7a9fa2 | 2016-10-13 18:43:45 +0100 | [diff] [blame] | 1205 | KeyStoreServiceReturnCode KeyStoreService::addAuthToken(const uint8_t* token, size_t length) { |
| 1206 | // TODO(swillden): When gatekeeper and fingerprint are ready, this should be updated to |
| 1207 | // receive a HardwareAuthToken, rather than an opaque byte array. |
| 1208 | |
Shawn Willden | c1d1fee | 2016-01-26 22:44:56 -0700 | [diff] [blame] | 1209 | if (!checkBinderPermission(P_ADD_AUTH)) { |
| 1210 | ALOGW("addAuthToken: permission denied for %d", IPCThreadState::self()->getCallingUid()); |
Janis Danisevskis | c7a9fa2 | 2016-10-13 18:43:45 +0100 | [diff] [blame] | 1211 | return ResponseCode::PERMISSION_DENIED; |
Shawn Willden | c1d1fee | 2016-01-26 22:44:56 -0700 | [diff] [blame] | 1212 | } |
| 1213 | if (length != sizeof(hw_auth_token_t)) { |
Janis Danisevskis | c7a9fa2 | 2016-10-13 18:43:45 +0100 | [diff] [blame] | 1214 | return ErrorCode::INVALID_ARGUMENT; |
Shawn Willden | c1d1fee | 2016-01-26 22:44:56 -0700 | [diff] [blame] | 1215 | } |
Janis Danisevskis | c7a9fa2 | 2016-10-13 18:43:45 +0100 | [diff] [blame] | 1216 | |
| 1217 | hw_auth_token_t authToken; |
| 1218 | memcpy(reinterpret_cast<void*>(&authToken), token, sizeof(hw_auth_token_t)); |
| 1219 | if (authToken.version != 0) { |
| 1220 | return ErrorCode::INVALID_ARGUMENT; |
| 1221 | } |
| 1222 | |
| 1223 | std::unique_ptr<HardwareAuthToken> hidlAuthToken(new HardwareAuthToken); |
| 1224 | hidlAuthToken->challenge = authToken.challenge; |
| 1225 | hidlAuthToken->userId = authToken.user_id; |
| 1226 | hidlAuthToken->authenticatorId = authToken.authenticator_id; |
| 1227 | hidlAuthToken->authenticatorType = authToken.authenticator_type; |
| 1228 | hidlAuthToken->timestamp = authToken.timestamp; |
| 1229 | static_assert( |
| 1230 | std::is_same<decltype(hidlAuthToken->hmac), |
| 1231 | ::android::hardware::hidl_array<uint8_t, sizeof(authToken.hmac)>>::value, |
| 1232 | "This function assumes token HMAC is 32 bytes, but it might not be."); |
| 1233 | std::copy(authToken.hmac, authToken.hmac + sizeof(authToken.hmac), hidlAuthToken->hmac.data()); |
| 1234 | |
Shawn Willden | c1d1fee | 2016-01-26 22:44:56 -0700 | [diff] [blame] | 1235 | // The table takes ownership of authToken. |
Janis Danisevskis | c7a9fa2 | 2016-10-13 18:43:45 +0100 | [diff] [blame] | 1236 | mAuthTokenTable.AddAuthenticationToken(hidlAuthToken.release()); |
| 1237 | return ResponseCode::NO_ERROR; |
Shawn Willden | c1d1fee | 2016-01-26 22:44:56 -0700 | [diff] [blame] | 1238 | } |
| 1239 | |
Janis Danisevskis | 7612fd4 | 2016-09-01 11:50:02 +0100 | [diff] [blame] | 1240 | constexpr size_t KEY_ATTESTATION_APPLICATION_ID_MAX_SIZE = 1024; |
| 1241 | |
Bartosz Fabianowski | a9452d9 | 2017-01-23 22:21:11 +0100 | [diff] [blame] | 1242 | bool isDeviceIdAttestationRequested(const hidl_vec<KeyParameter>& params) { |
| 1243 | for (size_t i = 0; i < params.size(); ++i) { |
| 1244 | switch (params[i].tag) { |
| 1245 | case Tag::ATTESTATION_ID_BRAND: |
| 1246 | case Tag::ATTESTATION_ID_DEVICE: |
| 1247 | case Tag::ATTESTATION_ID_PRODUCT: |
| 1248 | case Tag::ATTESTATION_ID_SERIAL: |
| 1249 | case Tag::ATTESTATION_ID_IMEI: |
| 1250 | case Tag::ATTESTATION_ID_MEID: |
| 1251 | return true; |
| 1252 | default: |
| 1253 | break; |
| 1254 | } |
| 1255 | } |
| 1256 | return false; |
| 1257 | } |
| 1258 | |
Janis Danisevskis | c7a9fa2 | 2016-10-13 18:43:45 +0100 | [diff] [blame] | 1259 | KeyStoreServiceReturnCode KeyStoreService::attestKey(const String16& name, |
| 1260 | const hidl_vec<KeyParameter>& params, |
| 1261 | hidl_vec<hidl_vec<uint8_t>>* outChain) { |
| 1262 | if (!outChain) { |
| 1263 | return ErrorCode::OUTPUT_PARAMETER_NULL; |
| 1264 | } |
Shawn Willden | 50eb1b2 | 2016-01-21 12:41:23 -0700 | [diff] [blame] | 1265 | |
Janis Danisevskis | c7a9fa2 | 2016-10-13 18:43:45 +0100 | [diff] [blame] | 1266 | if (!checkAllowedOperationParams(params)) { |
| 1267 | return ErrorCode::INVALID_ARGUMENT; |
Shawn Willden | 50eb1b2 | 2016-01-21 12:41:23 -0700 | [diff] [blame] | 1268 | } |
| 1269 | |
| 1270 | uid_t callingUid = IPCThreadState::self()->getCallingUid(); |
| 1271 | |
Bartosz Fabianowski | a9452d9 | 2017-01-23 22:21:11 +0100 | [diff] [blame] | 1272 | bool attestingDeviceIds = isDeviceIdAttestationRequested(params); |
| 1273 | if (attestingDeviceIds) { |
| 1274 | sp<IBinder> binder = defaultServiceManager()->getService(String16("permission")); |
| 1275 | if (binder == 0) { |
| 1276 | return ErrorCode::CANNOT_ATTEST_IDS; |
| 1277 | } |
| 1278 | if (!interface_cast<IPermissionController>(binder)->checkPermission( |
| 1279 | String16("android.permission.READ_PRIVILEGED_PHONE_STATE"), |
| 1280 | IPCThreadState::self()->getCallingPid(), callingUid)) { |
| 1281 | return ErrorCode::CANNOT_ATTEST_IDS; |
| 1282 | } |
| 1283 | } |
| 1284 | |
Shawn Willden | 50eb1b2 | 2016-01-21 12:41:23 -0700 | [diff] [blame] | 1285 | Blob keyBlob; |
| 1286 | String8 name8(name); |
Janis Danisevskis | c7a9fa2 | 2016-10-13 18:43:45 +0100 | [diff] [blame] | 1287 | KeyStoreServiceReturnCode responseCode = |
Shawn Willden | 50eb1b2 | 2016-01-21 12:41:23 -0700 | [diff] [blame] | 1288 | mKeyStore->getKeyForName(&keyBlob, name8, callingUid, TYPE_KEYMASTER_10); |
Janis Danisevskis | c7a9fa2 | 2016-10-13 18:43:45 +0100 | [diff] [blame] | 1289 | if (!responseCode.isOk()) { |
Shawn Willden | 50eb1b2 | 2016-01-21 12:41:23 -0700 | [diff] [blame] | 1290 | return responseCode; |
| 1291 | } |
| 1292 | |
Janis Danisevskis | 18f27ad | 2016-06-01 13:57:40 -0700 | [diff] [blame] | 1293 | auto asn1_attestation_id_result = security::gather_attestation_application_id(callingUid); |
Janis Danisevskis | 011675d | 2016-09-01 11:41:29 +0100 | [diff] [blame] | 1294 | if (!asn1_attestation_id_result.isOk()) { |
Janis Danisevskis | 18f27ad | 2016-06-01 13:57:40 -0700 | [diff] [blame] | 1295 | ALOGE("failed to gather attestation_id"); |
Janis Danisevskis | c7a9fa2 | 2016-10-13 18:43:45 +0100 | [diff] [blame] | 1296 | return ErrorCode::ATTESTATION_APPLICATION_ID_MISSING; |
Janis Danisevskis | 18f27ad | 2016-06-01 13:57:40 -0700 | [diff] [blame] | 1297 | } |
Janis Danisevskis | c7a9fa2 | 2016-10-13 18:43:45 +0100 | [diff] [blame] | 1298 | std::vector<uint8_t>& asn1_attestation_id = asn1_attestation_id_result; |
Janis Danisevskis | 18f27ad | 2016-06-01 13:57:40 -0700 | [diff] [blame] | 1299 | |
| 1300 | /* |
Janis Danisevskis | c7a9fa2 | 2016-10-13 18:43:45 +0100 | [diff] [blame] | 1301 | * The attestation application ID cannot be longer than |
| 1302 | * KEY_ATTESTATION_APPLICATION_ID_MAX_SIZE, so we truncate if too long. |
Janis Danisevskis | 18f27ad | 2016-06-01 13:57:40 -0700 | [diff] [blame] | 1303 | */ |
Janis Danisevskis | c7a9fa2 | 2016-10-13 18:43:45 +0100 | [diff] [blame] | 1304 | if (asn1_attestation_id.size() > KEY_ATTESTATION_APPLICATION_ID_MAX_SIZE) |
| 1305 | asn1_attestation_id.resize(KEY_ATTESTATION_APPLICATION_ID_MAX_SIZE); |
Janis Danisevskis | 18f27ad | 2016-06-01 13:57:40 -0700 | [diff] [blame] | 1306 | |
Janis Danisevskis | c7a9fa2 | 2016-10-13 18:43:45 +0100 | [diff] [blame] | 1307 | AuthorizationSet mutableParams = params; |
Shawn Willden | 50eb1b2 | 2016-01-21 12:41:23 -0700 | [diff] [blame] | 1308 | |
Janis Danisevskis | c7a9fa2 | 2016-10-13 18:43:45 +0100 | [diff] [blame] | 1309 | mutableParams.push_back(TAG_ATTESTATION_APPLICATION_ID, blob2hidlVec(asn1_attestation_id)); |
| 1310 | |
| 1311 | KeyStoreServiceReturnCode error; |
| 1312 | auto hidlCb = [&](ErrorCode ret, const hidl_vec<hidl_vec<uint8_t>>& certChain) { |
| 1313 | error = ret; |
| 1314 | if (!error.isOk()) { |
| 1315 | return; |
| 1316 | } |
| 1317 | if (outChain) *outChain = certChain; |
| 1318 | }; |
| 1319 | |
| 1320 | auto hidlKey = blob2hidlVec(keyBlob); |
| 1321 | auto& dev = mKeyStore->getDevice(keyBlob); |
Bartosz Fabianowski | a9452d9 | 2017-01-23 22:21:11 +0100 | [diff] [blame] | 1322 | KeyStoreServiceReturnCode attestationRc = |
Janis Danisevskis | c7a9fa2 | 2016-10-13 18:43:45 +0100 | [diff] [blame] | 1323 | KS_HANDLE_HIDL_ERROR(dev->attestKey(hidlKey, mutableParams.hidl_data(), hidlCb)); |
Bartosz Fabianowski | a9452d9 | 2017-01-23 22:21:11 +0100 | [diff] [blame] | 1324 | |
| 1325 | KeyStoreServiceReturnCode deletionRc; |
| 1326 | if (attestingDeviceIds) { |
| 1327 | // When performing device id attestation, treat the key as ephemeral and delete it straight |
| 1328 | // away. |
| 1329 | deletionRc = KS_HANDLE_HIDL_ERROR(dev->deleteKey(hidlKey)); |
Janis Danisevskis | c7a9fa2 | 2016-10-13 18:43:45 +0100 | [diff] [blame] | 1330 | } |
Bartosz Fabianowski | a9452d9 | 2017-01-23 22:21:11 +0100 | [diff] [blame] | 1331 | |
| 1332 | if (!attestationRc.isOk()) { |
| 1333 | return attestationRc; |
| 1334 | } |
| 1335 | if (!error.isOk()) { |
| 1336 | return error; |
| 1337 | } |
| 1338 | return deletionRc; |
Shawn Willden | 50eb1b2 | 2016-01-21 12:41:23 -0700 | [diff] [blame] | 1339 | } |
| 1340 | |
Janis Danisevskis | c7a9fa2 | 2016-10-13 18:43:45 +0100 | [diff] [blame] | 1341 | KeyStoreServiceReturnCode KeyStoreService::onDeviceOffBody() { |
Tucker Sylvestro | 0ab28b7 | 2016-08-05 18:02:47 -0400 | [diff] [blame] | 1342 | // TODO(tuckeris): add permission check. This should be callable from ClockworkHome only. |
| 1343 | mAuthTokenTable.onDeviceOffBody(); |
Janis Danisevskis | c7a9fa2 | 2016-10-13 18:43:45 +0100 | [diff] [blame] | 1344 | return ResponseCode::NO_ERROR; |
Tucker Sylvestro | 0ab28b7 | 2016-08-05 18:02:47 -0400 | [diff] [blame] | 1345 | } |
| 1346 | |
Shawn Willden | c1d1fee | 2016-01-26 22:44:56 -0700 | [diff] [blame] | 1347 | /** |
| 1348 | * Prune the oldest pruneable operation. |
| 1349 | */ |
| 1350 | bool KeyStoreService::pruneOperation() { |
| 1351 | sp<IBinder> oldest = mOperationMap.getOldestPruneableOperation(); |
| 1352 | ALOGD("Trying to prune operation %p", oldest.get()); |
| 1353 | size_t op_count_before_abort = mOperationMap.getOperationCount(); |
| 1354 | // We mostly ignore errors from abort() because all we care about is whether at least |
| 1355 | // one operation has been removed. |
| 1356 | int abort_error = abort(oldest); |
| 1357 | if (mOperationMap.getOperationCount() >= op_count_before_abort) { |
| 1358 | ALOGE("Failed to abort pruneable operation %p, error: %d", oldest.get(), abort_error); |
| 1359 | return false; |
| 1360 | } |
| 1361 | return true; |
| 1362 | } |
| 1363 | |
| 1364 | /** |
| 1365 | * Get the effective target uid for a binder operation that takes an |
| 1366 | * optional uid as the target. |
| 1367 | */ |
| 1368 | uid_t KeyStoreService::getEffectiveUid(int32_t targetUid) { |
| 1369 | if (targetUid == UID_SELF) { |
| 1370 | return IPCThreadState::self()->getCallingUid(); |
| 1371 | } |
| 1372 | return static_cast<uid_t>(targetUid); |
| 1373 | } |
| 1374 | |
| 1375 | /** |
| 1376 | * Check if the caller of the current binder method has the required |
| 1377 | * permission and if acting on other uids the grants to do so. |
| 1378 | */ |
| 1379 | bool KeyStoreService::checkBinderPermission(perm_t permission, int32_t targetUid) { |
| 1380 | uid_t callingUid = IPCThreadState::self()->getCallingUid(); |
| 1381 | pid_t spid = IPCThreadState::self()->getCallingPid(); |
| 1382 | if (!has_permission(callingUid, permission, spid)) { |
| 1383 | ALOGW("permission %s denied for %d", get_perm_label(permission), callingUid); |
| 1384 | return false; |
| 1385 | } |
| 1386 | if (!is_granted_to(callingUid, getEffectiveUid(targetUid))) { |
| 1387 | ALOGW("uid %d not granted to act for %d", callingUid, targetUid); |
| 1388 | return false; |
| 1389 | } |
| 1390 | return true; |
| 1391 | } |
| 1392 | |
| 1393 | /** |
| 1394 | * Check if the caller of the current binder method has the required |
| 1395 | * permission and the target uid is the caller or the caller is system. |
| 1396 | */ |
| 1397 | bool KeyStoreService::checkBinderPermissionSelfOrSystem(perm_t permission, int32_t targetUid) { |
| 1398 | uid_t callingUid = IPCThreadState::self()->getCallingUid(); |
| 1399 | pid_t spid = IPCThreadState::self()->getCallingPid(); |
| 1400 | if (!has_permission(callingUid, permission, spid)) { |
| 1401 | ALOGW("permission %s denied for %d", get_perm_label(permission), callingUid); |
| 1402 | return false; |
| 1403 | } |
| 1404 | return getEffectiveUid(targetUid) == callingUid || callingUid == AID_SYSTEM; |
| 1405 | } |
| 1406 | |
| 1407 | /** |
| 1408 | * Check if the caller of the current binder method has the required |
| 1409 | * permission or the target of the operation is the caller's uid. This is |
| 1410 | * for operation where the permission is only for cross-uid activity and all |
| 1411 | * uids are allowed to act on their own (ie: clearing all entries for a |
| 1412 | * given uid). |
| 1413 | */ |
| 1414 | bool KeyStoreService::checkBinderPermissionOrSelfTarget(perm_t permission, int32_t targetUid) { |
| 1415 | uid_t callingUid = IPCThreadState::self()->getCallingUid(); |
| 1416 | if (getEffectiveUid(targetUid) == callingUid) { |
| 1417 | return true; |
| 1418 | } else { |
| 1419 | return checkBinderPermission(permission, targetUid); |
| 1420 | } |
| 1421 | } |
| 1422 | |
| 1423 | /** |
| 1424 | * Helper method to check that the caller has the required permission as |
| 1425 | * well as the keystore is in the unlocked state if checkUnlocked is true. |
| 1426 | * |
| 1427 | * Returns NO_ERROR on success, PERMISSION_DENIED on a permission error and |
| 1428 | * otherwise the state of keystore when not unlocked and checkUnlocked is |
| 1429 | * true. |
| 1430 | */ |
Janis Danisevskis | c7a9fa2 | 2016-10-13 18:43:45 +0100 | [diff] [blame] | 1431 | KeyStoreServiceReturnCode |
| 1432 | KeyStoreService::checkBinderPermissionAndKeystoreState(perm_t permission, int32_t targetUid, |
| 1433 | bool checkUnlocked) { |
Shawn Willden | c1d1fee | 2016-01-26 22:44:56 -0700 | [diff] [blame] | 1434 | if (!checkBinderPermission(permission, targetUid)) { |
Janis Danisevskis | c7a9fa2 | 2016-10-13 18:43:45 +0100 | [diff] [blame] | 1435 | return ResponseCode::PERMISSION_DENIED; |
Shawn Willden | c1d1fee | 2016-01-26 22:44:56 -0700 | [diff] [blame] | 1436 | } |
| 1437 | State state = mKeyStore->getState(get_user_id(getEffectiveUid(targetUid))); |
| 1438 | if (checkUnlocked && !isKeystoreUnlocked(state)) { |
Janis Danisevskis | c7a9fa2 | 2016-10-13 18:43:45 +0100 | [diff] [blame] | 1439 | // All State values coincide with ResponseCodes |
| 1440 | return static_cast<ResponseCode>(state); |
Shawn Willden | c1d1fee | 2016-01-26 22:44:56 -0700 | [diff] [blame] | 1441 | } |
| 1442 | |
Janis Danisevskis | c7a9fa2 | 2016-10-13 18:43:45 +0100 | [diff] [blame] | 1443 | return ResponseCode::NO_ERROR; |
Shawn Willden | c1d1fee | 2016-01-26 22:44:56 -0700 | [diff] [blame] | 1444 | } |
| 1445 | |
| 1446 | bool KeyStoreService::isKeystoreUnlocked(State state) { |
| 1447 | switch (state) { |
| 1448 | case ::STATE_NO_ERROR: |
| 1449 | return true; |
| 1450 | case ::STATE_UNINITIALIZED: |
| 1451 | case ::STATE_LOCKED: |
| 1452 | return false; |
| 1453 | } |
| 1454 | return false; |
| 1455 | } |
| 1456 | |
Shawn Willden | c1d1fee | 2016-01-26 22:44:56 -0700 | [diff] [blame] | 1457 | /** |
Janis Danisevskis | c7a9fa2 | 2016-10-13 18:43:45 +0100 | [diff] [blame] | 1458 | * Check that all KeyParameter's provided by the application are |
Shawn Willden | c1d1fee | 2016-01-26 22:44:56 -0700 | [diff] [blame] | 1459 | * allowed. Any parameter that keystore adds itself should be disallowed here. |
| 1460 | */ |
Janis Danisevskis | c7a9fa2 | 2016-10-13 18:43:45 +0100 | [diff] [blame] | 1461 | bool KeyStoreService::checkAllowedOperationParams(const hidl_vec<KeyParameter>& params) { |
| 1462 | for (size_t i = 0; i < params.size(); ++i) { |
| 1463 | switch (params[i].tag) { |
| 1464 | case Tag::AUTH_TOKEN: |
Janis Danisevskis | 18f27ad | 2016-06-01 13:57:40 -0700 | [diff] [blame] | 1465 | // fall through intended |
Janis Danisevskis | c7a9fa2 | 2016-10-13 18:43:45 +0100 | [diff] [blame] | 1466 | case Tag::ATTESTATION_APPLICATION_ID: |
Shawn Willden | c1d1fee | 2016-01-26 22:44:56 -0700 | [diff] [blame] | 1467 | return false; |
| 1468 | default: |
| 1469 | break; |
| 1470 | } |
| 1471 | } |
| 1472 | return true; |
| 1473 | } |
| 1474 | |
Janis Danisevskis | c7a9fa2 | 2016-10-13 18:43:45 +0100 | [diff] [blame] | 1475 | ErrorCode KeyStoreService::getOperationCharacteristics(const hidl_vec<uint8_t>& key, |
| 1476 | km_device_t* dev, |
| 1477 | const AuthorizationSet& params, |
| 1478 | KeyCharacteristics* out) { |
| 1479 | hidl_vec<uint8_t> appId; |
| 1480 | hidl_vec<uint8_t> appData; |
Shawn Willden | c1d1fee | 2016-01-26 22:44:56 -0700 | [diff] [blame] | 1481 | for (auto param : params) { |
Janis Danisevskis | c7a9fa2 | 2016-10-13 18:43:45 +0100 | [diff] [blame] | 1482 | if (param.tag == Tag::APPLICATION_ID) { |
| 1483 | appId = authorizationValue(TAG_APPLICATION_ID, param).value(); |
| 1484 | } else if (param.tag == Tag::APPLICATION_DATA) { |
| 1485 | appData = authorizationValue(TAG_APPLICATION_DATA, param).value(); |
Shawn Willden | c1d1fee | 2016-01-26 22:44:56 -0700 | [diff] [blame] | 1486 | } |
| 1487 | } |
Janis Danisevskis | c7a9fa2 | 2016-10-13 18:43:45 +0100 | [diff] [blame] | 1488 | ErrorCode error = ErrorCode::OK; |
| 1489 | |
| 1490 | auto hidlCb = [&](ErrorCode ret, const KeyCharacteristics& keyCharacteristics) { |
| 1491 | error = ret; |
| 1492 | if (error != ErrorCode::OK) { |
| 1493 | return; |
| 1494 | } |
| 1495 | if (out) *out = keyCharacteristics; |
| 1496 | }; |
| 1497 | |
| 1498 | ErrorCode rc = KS_HANDLE_HIDL_ERROR((*dev)->getKeyCharacteristics(key, appId, appData, hidlCb)); |
| 1499 | if (rc != ErrorCode::OK) { |
| 1500 | return rc; |
Shawn Willden | c1d1fee | 2016-01-26 22:44:56 -0700 | [diff] [blame] | 1501 | } |
| 1502 | return error; |
| 1503 | } |
| 1504 | |
| 1505 | /** |
| 1506 | * Get the auth token for this operation from the auth token table. |
| 1507 | * |
Janis Danisevskis | c7a9fa2 | 2016-10-13 18:43:45 +0100 | [diff] [blame] | 1508 | * Returns ResponseCode::NO_ERROR if the auth token was set or none was required. |
Shawn Willden | c1d1fee | 2016-01-26 22:44:56 -0700 | [diff] [blame] | 1509 | * ::OP_AUTH_NEEDED if it is a per op authorization, no |
| 1510 | * authorization token exists for that operation and |
| 1511 | * failOnTokenMissing is false. |
| 1512 | * KM_ERROR_KEY_USER_NOT_AUTHENTICATED if there is no valid auth |
| 1513 | * token for the operation |
| 1514 | */ |
Janis Danisevskis | c7a9fa2 | 2016-10-13 18:43:45 +0100 | [diff] [blame] | 1515 | KeyStoreServiceReturnCode KeyStoreService::getAuthToken(const KeyCharacteristics& characteristics, |
| 1516 | uint64_t handle, KeyPurpose purpose, |
| 1517 | const HardwareAuthToken** authToken, |
| 1518 | bool failOnTokenMissing) { |
Shawn Willden | c1d1fee | 2016-01-26 22:44:56 -0700 | [diff] [blame] | 1519 | |
Janis Danisevskis | c7a9fa2 | 2016-10-13 18:43:45 +0100 | [diff] [blame] | 1520 | AuthorizationSet allCharacteristics; |
| 1521 | for (size_t i = 0; i < characteristics.softwareEnforced.size(); i++) { |
| 1522 | allCharacteristics.push_back(characteristics.softwareEnforced[i]); |
Shawn Willden | c1d1fee | 2016-01-26 22:44:56 -0700 | [diff] [blame] | 1523 | } |
Janis Danisevskis | c7a9fa2 | 2016-10-13 18:43:45 +0100 | [diff] [blame] | 1524 | for (size_t i = 0; i < characteristics.teeEnforced.size(); i++) { |
| 1525 | allCharacteristics.push_back(characteristics.teeEnforced[i]); |
Shawn Willden | c1d1fee | 2016-01-26 22:44:56 -0700 | [diff] [blame] | 1526 | } |
Janis Danisevskis | c7a9fa2 | 2016-10-13 18:43:45 +0100 | [diff] [blame] | 1527 | AuthTokenTable::Error err = |
| 1528 | mAuthTokenTable.FindAuthorization(allCharacteristics, purpose, handle, authToken); |
Shawn Willden | c1d1fee | 2016-01-26 22:44:56 -0700 | [diff] [blame] | 1529 | switch (err) { |
Janis Danisevskis | c7a9fa2 | 2016-10-13 18:43:45 +0100 | [diff] [blame] | 1530 | case AuthTokenTable::OK: |
| 1531 | case AuthTokenTable::AUTH_NOT_REQUIRED: |
| 1532 | return ResponseCode::NO_ERROR; |
| 1533 | case AuthTokenTable::AUTH_TOKEN_NOT_FOUND: |
| 1534 | case AuthTokenTable::AUTH_TOKEN_EXPIRED: |
| 1535 | case AuthTokenTable::AUTH_TOKEN_WRONG_SID: |
| 1536 | return ErrorCode::KEY_USER_NOT_AUTHENTICATED; |
| 1537 | case AuthTokenTable::OP_HANDLE_REQUIRED: |
| 1538 | return failOnTokenMissing ? KeyStoreServiceReturnCode(ErrorCode::KEY_USER_NOT_AUTHENTICATED) |
| 1539 | : KeyStoreServiceReturnCode(ResponseCode::OP_AUTH_NEEDED); |
Shawn Willden | c1d1fee | 2016-01-26 22:44:56 -0700 | [diff] [blame] | 1540 | default: |
| 1541 | ALOGE("Unexpected FindAuthorization return value %d", err); |
Janis Danisevskis | c7a9fa2 | 2016-10-13 18:43:45 +0100 | [diff] [blame] | 1542 | return ErrorCode::INVALID_ARGUMENT; |
Shawn Willden | c1d1fee | 2016-01-26 22:44:56 -0700 | [diff] [blame] | 1543 | } |
| 1544 | } |
| 1545 | |
| 1546 | /** |
| 1547 | * Add the auth token for the operation to the param list if the operation |
| 1548 | * requires authorization. Uses the cached result in the OperationMap if available |
| 1549 | * otherwise gets the token from the AuthTokenTable and caches the result. |
| 1550 | * |
Janis Danisevskis | c7a9fa2 | 2016-10-13 18:43:45 +0100 | [diff] [blame] | 1551 | * Returns ResponseCode::NO_ERROR if the auth token was added or not needed. |
Shawn Willden | c1d1fee | 2016-01-26 22:44:56 -0700 | [diff] [blame] | 1552 | * KM_ERROR_KEY_USER_NOT_AUTHENTICATED if the operation is not |
| 1553 | * authenticated. |
| 1554 | * KM_ERROR_INVALID_OPERATION_HANDLE if token is not a valid |
| 1555 | * operation token. |
| 1556 | */ |
Janis Danisevskis | c7a9fa2 | 2016-10-13 18:43:45 +0100 | [diff] [blame] | 1557 | KeyStoreServiceReturnCode KeyStoreService::addOperationAuthTokenIfNeeded(const sp<IBinder>& token, |
| 1558 | AuthorizationSet* params) { |
| 1559 | const HardwareAuthToken* authToken = nullptr; |
Shawn Willden | c1d1fee | 2016-01-26 22:44:56 -0700 | [diff] [blame] | 1560 | mOperationMap.getOperationAuthToken(token, &authToken); |
| 1561 | if (!authToken) { |
Janis Danisevskis | c7a9fa2 | 2016-10-13 18:43:45 +0100 | [diff] [blame] | 1562 | km_device_t dev; |
| 1563 | uint64_t handle; |
| 1564 | const KeyCharacteristics* characteristics = nullptr; |
| 1565 | KeyPurpose purpose; |
| 1566 | km_id_t keyid; |
Shawn Willden | c1d1fee | 2016-01-26 22:44:56 -0700 | [diff] [blame] | 1567 | if (!mOperationMap.getOperation(token, &handle, &keyid, &purpose, &dev, &characteristics)) { |
Janis Danisevskis | c7a9fa2 | 2016-10-13 18:43:45 +0100 | [diff] [blame] | 1568 | return ErrorCode::INVALID_OPERATION_HANDLE; |
Shawn Willden | c1d1fee | 2016-01-26 22:44:56 -0700 | [diff] [blame] | 1569 | } |
Janis Danisevskis | c7a9fa2 | 2016-10-13 18:43:45 +0100 | [diff] [blame] | 1570 | auto result = getAuthToken(*characteristics, handle, purpose, &authToken); |
| 1571 | if (!result.isOk()) { |
Shawn Willden | c1d1fee | 2016-01-26 22:44:56 -0700 | [diff] [blame] | 1572 | return result; |
| 1573 | } |
| 1574 | if (authToken) { |
| 1575 | mOperationMap.setOperationAuthToken(token, authToken); |
| 1576 | } |
| 1577 | } |
Janis Danisevskis | c7a9fa2 | 2016-10-13 18:43:45 +0100 | [diff] [blame] | 1578 | addAuthTokenToParams(params, authToken); |
| 1579 | return ResponseCode::NO_ERROR; |
Shawn Willden | c1d1fee | 2016-01-26 22:44:56 -0700 | [diff] [blame] | 1580 | } |
| 1581 | |
| 1582 | /** |
| 1583 | * Translate a result value to a legacy return value. All keystore errors are |
| 1584 | * preserved and keymaster errors become SYSTEM_ERRORs |
| 1585 | */ |
Janis Danisevskis | c7a9fa2 | 2016-10-13 18:43:45 +0100 | [diff] [blame] | 1586 | KeyStoreServiceReturnCode KeyStoreService::translateResultToLegacyResult(int32_t result) { |
Shawn Willden | c1d1fee | 2016-01-26 22:44:56 -0700 | [diff] [blame] | 1587 | if (result > 0) { |
Janis Danisevskis | c7a9fa2 | 2016-10-13 18:43:45 +0100 | [diff] [blame] | 1588 | return static_cast<ResponseCode>(result); |
Shawn Willden | c1d1fee | 2016-01-26 22:44:56 -0700 | [diff] [blame] | 1589 | } |
Janis Danisevskis | c7a9fa2 | 2016-10-13 18:43:45 +0100 | [diff] [blame] | 1590 | return ResponseCode::SYSTEM_ERROR; |
Shawn Willden | c1d1fee | 2016-01-26 22:44:56 -0700 | [diff] [blame] | 1591 | } |
| 1592 | |
Janis Danisevskis | c7a9fa2 | 2016-10-13 18:43:45 +0100 | [diff] [blame] | 1593 | static NullOr<const Algorithm&> |
| 1594 | getKeyAlgoritmFromKeyCharacteristics(const KeyCharacteristics& characteristics) { |
| 1595 | for (size_t i = 0; i < characteristics.teeEnforced.size(); ++i) { |
| 1596 | auto algo = authorizationValue(TAG_ALGORITHM, characteristics.teeEnforced[i]); |
| 1597 | if (algo.isOk()) return algo.value(); |
Shawn Willden | c1d1fee | 2016-01-26 22:44:56 -0700 | [diff] [blame] | 1598 | } |
Janis Danisevskis | c7a9fa2 | 2016-10-13 18:43:45 +0100 | [diff] [blame] | 1599 | for (size_t i = 0; i < characteristics.softwareEnforced.size(); ++i) { |
| 1600 | auto algo = authorizationValue(TAG_ALGORITHM, characteristics.softwareEnforced[i]); |
| 1601 | if (algo.isOk()) return algo.value(); |
Shawn Willden | c1d1fee | 2016-01-26 22:44:56 -0700 | [diff] [blame] | 1602 | } |
Janis Danisevskis | c7a9fa2 | 2016-10-13 18:43:45 +0100 | [diff] [blame] | 1603 | return {}; |
Shawn Willden | c1d1fee | 2016-01-26 22:44:56 -0700 | [diff] [blame] | 1604 | } |
| 1605 | |
Janis Danisevskis | c7a9fa2 | 2016-10-13 18:43:45 +0100 | [diff] [blame] | 1606 | void KeyStoreService::addLegacyBeginParams(const String16& name, AuthorizationSet* params) { |
Shawn Willden | c1d1fee | 2016-01-26 22:44:56 -0700 | [diff] [blame] | 1607 | // All legacy keys are DIGEST_NONE/PAD_NONE. |
Janis Danisevskis | c7a9fa2 | 2016-10-13 18:43:45 +0100 | [diff] [blame] | 1608 | params->push_back(TAG_DIGEST, Digest::NONE); |
| 1609 | params->push_back(TAG_PADDING, PaddingMode::NONE); |
Shawn Willden | c1d1fee | 2016-01-26 22:44:56 -0700 | [diff] [blame] | 1610 | |
| 1611 | // Look up the algorithm of the key. |
| 1612 | KeyCharacteristics characteristics; |
Janis Danisevskis | c7a9fa2 | 2016-10-13 18:43:45 +0100 | [diff] [blame] | 1613 | auto rc = getKeyCharacteristics(name, hidl_vec<uint8_t>(), hidl_vec<uint8_t>(), UID_SELF, |
| 1614 | &characteristics); |
| 1615 | if (!rc.isOk()) { |
Shawn Willden | c1d1fee | 2016-01-26 22:44:56 -0700 | [diff] [blame] | 1616 | ALOGE("Failed to get key characteristics"); |
| 1617 | return; |
| 1618 | } |
Janis Danisevskis | c7a9fa2 | 2016-10-13 18:43:45 +0100 | [diff] [blame] | 1619 | auto algorithm = getKeyAlgoritmFromKeyCharacteristics(characteristics); |
| 1620 | if (!algorithm.isOk()) { |
Shawn Willden | c1d1fee | 2016-01-26 22:44:56 -0700 | [diff] [blame] | 1621 | ALOGE("getKeyCharacteristics did not include KM_TAG_ALGORITHM"); |
| 1622 | return; |
| 1623 | } |
Janis Danisevskis | c7a9fa2 | 2016-10-13 18:43:45 +0100 | [diff] [blame] | 1624 | params->push_back(TAG_ALGORITHM, algorithm.value()); |
Shawn Willden | c1d1fee | 2016-01-26 22:44:56 -0700 | [diff] [blame] | 1625 | } |
| 1626 | |
Janis Danisevskis | c7a9fa2 | 2016-10-13 18:43:45 +0100 | [diff] [blame] | 1627 | KeyStoreServiceReturnCode KeyStoreService::doLegacySignVerify(const String16& name, |
| 1628 | const hidl_vec<uint8_t>& data, |
| 1629 | hidl_vec<uint8_t>* out, |
| 1630 | const hidl_vec<uint8_t>& signature, |
| 1631 | KeyPurpose purpose) { |
Shawn Willden | c1d1fee | 2016-01-26 22:44:56 -0700 | [diff] [blame] | 1632 | |
| 1633 | std::basic_stringstream<uint8_t> outBuffer; |
| 1634 | OperationResult result; |
Janis Danisevskis | c7a9fa2 | 2016-10-13 18:43:45 +0100 | [diff] [blame] | 1635 | AuthorizationSet inArgs; |
| 1636 | addLegacyBeginParams(name, &inArgs); |
Shawn Willden | c1d1fee | 2016-01-26 22:44:56 -0700 | [diff] [blame] | 1637 | sp<IBinder> appToken(new BBinder); |
| 1638 | sp<IBinder> token; |
| 1639 | |
Janis Danisevskis | c7a9fa2 | 2016-10-13 18:43:45 +0100 | [diff] [blame] | 1640 | begin(appToken, name, purpose, true, inArgs.hidl_data(), hidl_vec<uint8_t>(), UID_SELF, |
| 1641 | &result); |
| 1642 | if (!result.resultCode.isOk()) { |
| 1643 | if (result.resultCode == ResponseCode::KEY_NOT_FOUND) { |
Shawn Willden | c1d1fee | 2016-01-26 22:44:56 -0700 | [diff] [blame] | 1644 | ALOGW("Key not found"); |
| 1645 | } else { |
Janis Danisevskis | c7a9fa2 | 2016-10-13 18:43:45 +0100 | [diff] [blame] | 1646 | ALOGW("Error in begin: %d", int32_t(result.resultCode)); |
Shawn Willden | c1d1fee | 2016-01-26 22:44:56 -0700 | [diff] [blame] | 1647 | } |
| 1648 | return translateResultToLegacyResult(result.resultCode); |
| 1649 | } |
Janis Danisevskis | c7a9fa2 | 2016-10-13 18:43:45 +0100 | [diff] [blame] | 1650 | inArgs.Clear(); |
Shawn Willden | c1d1fee | 2016-01-26 22:44:56 -0700 | [diff] [blame] | 1651 | token = result.token; |
| 1652 | size_t consumed = 0; |
| 1653 | size_t lastConsumed = 0; |
Janis Danisevskis | c7a9fa2 | 2016-10-13 18:43:45 +0100 | [diff] [blame] | 1654 | hidl_vec<uint8_t> data_view; |
Shawn Willden | c1d1fee | 2016-01-26 22:44:56 -0700 | [diff] [blame] | 1655 | do { |
Janis Danisevskis | c7a9fa2 | 2016-10-13 18:43:45 +0100 | [diff] [blame] | 1656 | data_view.setToExternal(const_cast<uint8_t*>(&data[consumed]), data.size() - consumed); |
| 1657 | update(token, inArgs.hidl_data(), data_view, &result); |
Shawn Willden | c1d1fee | 2016-01-26 22:44:56 -0700 | [diff] [blame] | 1658 | if (result.resultCode != ResponseCode::NO_ERROR) { |
Janis Danisevskis | c7a9fa2 | 2016-10-13 18:43:45 +0100 | [diff] [blame] | 1659 | ALOGW("Error in update: %d", int32_t(result.resultCode)); |
Shawn Willden | c1d1fee | 2016-01-26 22:44:56 -0700 | [diff] [blame] | 1660 | return translateResultToLegacyResult(result.resultCode); |
| 1661 | } |
| 1662 | if (out) { |
Janis Danisevskis | c7a9fa2 | 2016-10-13 18:43:45 +0100 | [diff] [blame] | 1663 | outBuffer.write(&result.data[0], result.data.size()); |
Shawn Willden | c1d1fee | 2016-01-26 22:44:56 -0700 | [diff] [blame] | 1664 | } |
| 1665 | lastConsumed = result.inputConsumed; |
| 1666 | consumed += lastConsumed; |
Janis Danisevskis | c7a9fa2 | 2016-10-13 18:43:45 +0100 | [diff] [blame] | 1667 | } while (consumed < data.size() && lastConsumed > 0); |
Shawn Willden | c1d1fee | 2016-01-26 22:44:56 -0700 | [diff] [blame] | 1668 | |
Janis Danisevskis | c7a9fa2 | 2016-10-13 18:43:45 +0100 | [diff] [blame] | 1669 | if (consumed != data.size()) { |
| 1670 | ALOGW("Not all data consumed. Consumed %zu of %zu", consumed, data.size()); |
| 1671 | return ResponseCode::SYSTEM_ERROR; |
Shawn Willden | c1d1fee | 2016-01-26 22:44:56 -0700 | [diff] [blame] | 1672 | } |
| 1673 | |
Janis Danisevskis | c7a9fa2 | 2016-10-13 18:43:45 +0100 | [diff] [blame] | 1674 | finish(token, inArgs.hidl_data(), signature, hidl_vec<uint8_t>(), &result); |
Shawn Willden | c1d1fee | 2016-01-26 22:44:56 -0700 | [diff] [blame] | 1675 | if (result.resultCode != ResponseCode::NO_ERROR) { |
Janis Danisevskis | c7a9fa2 | 2016-10-13 18:43:45 +0100 | [diff] [blame] | 1676 | ALOGW("Error in finish: %d", int32_t(result.resultCode)); |
Shawn Willden | c1d1fee | 2016-01-26 22:44:56 -0700 | [diff] [blame] | 1677 | return translateResultToLegacyResult(result.resultCode); |
| 1678 | } |
| 1679 | if (out) { |
Janis Danisevskis | c7a9fa2 | 2016-10-13 18:43:45 +0100 | [diff] [blame] | 1680 | outBuffer.write(&result.data[0], result.data.size()); |
Shawn Willden | c1d1fee | 2016-01-26 22:44:56 -0700 | [diff] [blame] | 1681 | } |
| 1682 | |
| 1683 | if (out) { |
| 1684 | auto buf = outBuffer.str(); |
Janis Danisevskis | c7a9fa2 | 2016-10-13 18:43:45 +0100 | [diff] [blame] | 1685 | out->resize(buf.size()); |
| 1686 | memcpy(&(*out)[0], buf.data(), out->size()); |
Shawn Willden | c1d1fee | 2016-01-26 22:44:56 -0700 | [diff] [blame] | 1687 | } |
| 1688 | |
Janis Danisevskis | c7a9fa2 | 2016-10-13 18:43:45 +0100 | [diff] [blame] | 1689 | return ResponseCode::NO_ERROR; |
Shawn Willden | c1d1fee | 2016-01-26 22:44:56 -0700 | [diff] [blame] | 1690 | } |
| 1691 | |
Janis Danisevskis | c7a9fa2 | 2016-10-13 18:43:45 +0100 | [diff] [blame] | 1692 | KeyStoreServiceReturnCode KeyStoreService::upgradeKeyBlob(const String16& name, uid_t uid, |
| 1693 | const AuthorizationSet& params, |
| 1694 | Blob* blob) { |
Shawn Willden | 98c5916 | 2016-03-20 09:10:18 -0600 | [diff] [blame] | 1695 | // Read the blob rather than assuming the caller provided the right name/uid/blob triplet. |
| 1696 | String8 name8(name); |
| 1697 | ResponseCode responseCode = mKeyStore->getKeyForName(blob, name8, uid, TYPE_KEYMASTER_10); |
Janis Danisevskis | c7a9fa2 | 2016-10-13 18:43:45 +0100 | [diff] [blame] | 1698 | if (responseCode != ResponseCode::NO_ERROR) { |
Shawn Willden | 98c5916 | 2016-03-20 09:10:18 -0600 | [diff] [blame] | 1699 | return responseCode; |
| 1700 | } |
| 1701 | |
Janis Danisevskis | c7a9fa2 | 2016-10-13 18:43:45 +0100 | [diff] [blame] | 1702 | auto hidlKey = blob2hidlVec(*blob); |
| 1703 | auto& dev = mKeyStore->getDevice(*blob); |
Shawn Willden | 98c5916 | 2016-03-20 09:10:18 -0600 | [diff] [blame] | 1704 | |
Janis Danisevskis | c7a9fa2 | 2016-10-13 18:43:45 +0100 | [diff] [blame] | 1705 | KeyStoreServiceReturnCode error; |
| 1706 | auto hidlCb = [&](ErrorCode ret, const hidl_vec<uint8_t>& upgradedKeyBlob) { |
| 1707 | error = ret; |
| 1708 | if (!error.isOk()) { |
| 1709 | return; |
| 1710 | } |
| 1711 | |
| 1712 | String8 filename(mKeyStore->getKeyNameForUidWithDir(name8, uid, ::TYPE_KEYMASTER_10)); |
| 1713 | error = mKeyStore->del(filename.string(), ::TYPE_ANY, get_user_id(uid)); |
| 1714 | if (!error.isOk()) { |
| 1715 | return; |
| 1716 | } |
| 1717 | |
| 1718 | Blob newBlob(&upgradedKeyBlob[0], upgradedKeyBlob.size(), nullptr /* info */, |
| 1719 | 0 /* infoLength */, ::TYPE_KEYMASTER_10); |
| 1720 | newBlob.setFallback(blob->isFallback()); |
| 1721 | newBlob.setEncrypted(blob->isEncrypted()); |
| 1722 | |
| 1723 | error = mKeyStore->put(filename.string(), &newBlob, get_user_id(uid)); |
| 1724 | if (!error.isOk()) { |
| 1725 | return; |
| 1726 | } |
| 1727 | |
| 1728 | // Re-read blob for caller. We can't use newBlob because writing it modified it. |
| 1729 | error = mKeyStore->getKeyForName(blob, name8, uid, TYPE_KEYMASTER_10); |
| 1730 | }; |
| 1731 | |
| 1732 | KeyStoreServiceReturnCode rc = |
| 1733 | KS_HANDLE_HIDL_ERROR(dev->upgradeKey(hidlKey, params.hidl_data(), hidlCb)); |
| 1734 | if (!rc.isOk()) { |
Shawn Willden | 98c5916 | 2016-03-20 09:10:18 -0600 | [diff] [blame] | 1735 | return rc; |
| 1736 | } |
| 1737 | |
Janis Danisevskis | c7a9fa2 | 2016-10-13 18:43:45 +0100 | [diff] [blame] | 1738 | return error; |
Shawn Willden | 98c5916 | 2016-03-20 09:10:18 -0600 | [diff] [blame] | 1739 | } |
| 1740 | |
Shawn Willden | c1d1fee | 2016-01-26 22:44:56 -0700 | [diff] [blame] | 1741 | } // namespace android |