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/*
** Copyright 2018, The Android Open Source Project
**
** Licensed under the Apache License, Version 2.0 (the "License");
** you may not use this file except in compliance with the License.
** You may obtain a copy of the License at
**
** http://www.apache.org/licenses/LICENSE-2.0
**
** Unless required by applicable law or agreed to in writing, software
** distributed under the License is distributed on an "AS IS" BASIS,
** WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
** See the License for the specific language governing permissions and
** limitations under the License.
*/
#include <unistd.h>
#define LOG_TAG "wait_for_strongbox"
#include <android-base/logging.h>
#include <keymasterV4_1/Keymaster.h>
using android::hardware::keymaster::V4_1::SecurityLevel;
using android::hardware::keymaster::V4_1::support::Keymaster;
useconds_t kWaitTimeMicroseconds = 1 * 1000; // 1 milliseconds
int main() {
for (unsigned cycleCount = 0; /* Forever */; ++cycleCount) {
auto keymasters = Keymaster::enumerateAvailableDevices();
bool foundStrongBox = false;
bool foundTee = false;
for (auto &dev : keymasters) {
SecurityLevel securityLevel = dev->halVersion().securityLevel;
uint8_t majorVersion = dev->halVersion().majorVersion;
if (securityLevel == SecurityLevel::STRONGBOX && majorVersion == 4) {
foundStrongBox = true;
}
if (securityLevel == SecurityLevel::TRUSTED_ENVIRONMENT && majorVersion == 4) {
foundTee = true;
}
}
if (foundTee && foundStrongBox) {
return 0;
}
if (cycleCount % 10 == 1) {
if (!foundStrongBox) {
LOG(WARNING) << "Still waiting for StrongBox Keymaster";
}
if (!foundTee) {
LOG(WARNING) << "Still waiting for TEE Keymaster";
}
}
usleep(kWaitTimeMicroseconds);
}
}
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