1 /* 2 ** Copyright 2018, The Android Open Source Project 3 ** 4 ** Licensed under the Apache License, Version 2.0 (the "License"); 5 ** you may not use this file except in compliance with the License. 6 ** You may obtain a copy of the License at 7 ** 8 ** http://www.apache.org/licenses/LICENSE-2.0 9 ** 10 ** Unless required by applicable law or agreed to in writing, software 11 ** distributed under the License is distributed on an "AS IS" BASIS, 12 ** WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. 13 ** See the License for the specific language governing permissions and 14 ** limitations under the License. 15 */ 16 17 #include <unistd.h> 18 19 #define LOG_TAG "wait_for_strongbox" 20 #include <android-base/logging.h> 21 22 #include <keymasterV4_1/Keymaster.h> 23 24 using android::hardware::keymaster::V4_1::SecurityLevel; 25 using android::hardware::keymaster::V4_1::support::Keymaster; 26 27 useconds_t kWaitTimeMicroseconds = 1 * 1000; // 1 milliseconds 28 main()29int main() { 30 for (unsigned cycleCount = 0; /* Forever */; ++cycleCount) { 31 auto keymasters = Keymaster::enumerateAvailableDevices(); 32 33 bool foundStrongBox = false; 34 bool foundTee = false; 35 for (auto &dev : keymasters) { 36 SecurityLevel securityLevel = dev->halVersion().securityLevel; 37 uint8_t majorVersion = dev->halVersion().majorVersion; 38 if (securityLevel == SecurityLevel::STRONGBOX && majorVersion == 4) { 39 foundStrongBox = true; 40 } 41 if (securityLevel == SecurityLevel::TRUSTED_ENVIRONMENT && majorVersion == 4) { 42 foundTee = true; 43 } 44 } 45 46 if (foundTee && foundStrongBox) { 47 return 0; 48 } 49 if (cycleCount % 10 == 1) { 50 if (!foundStrongBox) { 51 LOG(WARNING) << "Still waiting for StrongBox Keymaster"; 52 } 53 if (!foundTee) { 54 LOG(WARNING) << "Still waiting for TEE Keymaster"; 55 } 56 } 57 usleep(kWaitTimeMicroseconds); 58 } 59 } 60