Move Keymaster wrapper into support library.
This wrapper was used to manage KM3/KM4 compatibility in keystore.
It's also needed in vold, so this CL moves it here, to make it usable
for vold.
Test: keystore CTS tests
Change-Id: I8079b8577f7d4a8fd67f47fbe1f48861e4a0734b
diff --git a/keymaster/4.0/support/Keymaster4.cpp b/keymaster/4.0/support/Keymaster4.cpp
new file mode 100644
index 0000000..fdf78ae
--- /dev/null
+++ b/keymaster/4.0/support/Keymaster4.cpp
@@ -0,0 +1,48 @@
+/*
+**
+** Copyright 2017, 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 <keymasterV4_0/Keymaster4.h>
+
+#include <android-base/logging.h>
+
+namespace android {
+namespace hardware {
+namespace keymaster {
+namespace V4_0 {
+namespace support {
+
+void Keymaster4::getVersionIfNeeded() {
+ if (haveVersion_) return;
+
+ auto rc = dev_->getHardwareInfo([&](SecurityLevel securityLevel, auto...) {
+ securityLevel_ = securityLevel;
+ haveVersion_ = true;
+ });
+
+ CHECK(rc.isOk()) << "Got error " << rc.description() << " trying to get hardware info";
+}
+
+Keymaster::VersionResult Keymaster4::halVersion() {
+ getVersionIfNeeded();
+ return {ErrorCode::OK, halMajorVersion(), securityLevel_, true};
+}
+
+} // namespace support
+} // namespace V4_0
+} // namespace keymaster
+} // namespace hardware
+} // namespace android