ConfirmationUI reference implementation

This reference implementation implements the core
logic of the confirmation provider including the
cryptographic operations. For a full implementation
a user interface and a few policy checks are missing.

Bug: 63928580
Test: VtsHalConfirmationUIV1_0TargetTest
Change-Id: I22ca138ed612979223f8e83792b525a31709e0fe
diff --git a/confirmationui/1.0/default/PlatformSpecifics.h b/confirmationui/1.0/default/PlatformSpecifics.h
new file mode 100644
index 0000000..18b88c8
--- /dev/null
+++ b/confirmationui/1.0/default/PlatformSpecifics.h
@@ -0,0 +1,64 @@
+/*
+**
+** 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.
+*/
+
+#ifndef CONFIRMATIONUI_1_0_DEFAULT_PLATFORMSPECIFICS_H_
+#define CONFIRMATIONUI_1_0_DEFAULT_PLATFORMSPECIFICS_H_
+
+#include <stdint.h>
+#include <time.h>
+
+#include <android/hardware/confirmationui/1.0/IConfirmationResultCallback.h>
+#include <android/hardware/confirmationui/1.0/generic/GenericOperation.h>
+#include <android/hardware/confirmationui/support/confirmationui_utils.h>
+
+namespace android {
+namespace hardware {
+namespace confirmationui {
+namespace V1_0 {
+namespace implementation {
+
+struct MonotonicClockTimeStamper {
+    class TimeStamp {
+       public:
+        explicit TimeStamp(uint64_t ts) : timestamp_(ts), ok_(true) {}
+        TimeStamp() : timestamp_(0), ok_(false) {}
+        bool isOk() const { return ok_; }
+        operator const uint64_t() const { return timestamp_; }
+
+       private:
+        uint64_t timestamp_;
+        bool ok_;
+    };
+    static TimeStamp now();
+};
+
+class HMacImplementation {
+   public:
+    static support::NullOr<support::array<uint8_t, 32>> hmac256(
+        const uint8_t key[32], std::initializer_list<support::ByteBufferProxy> buffers);
+};
+
+using MyOperation = generic::Operation<sp<IConfirmationResultCallback>, MonotonicClockTimeStamper,
+                                       HMacImplementation>;
+
+}  // namespace implementation
+}  // namespace V1_0
+}  // namespace confirmationui
+}  // namespace hardware
+}  // namespace android
+
+#endif  // CONFIRMATIONUI_1_0_DEFAULT_PLATFORMSPECIFICS_H_