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

1 files changed, 62 insertions, 0 deletions

diff --git a/confirmationui/1.0/default/PlatformSpecifics.cpp b/confirmationui/1.0/default/PlatformSpecifics.cpp
new file mode 100644
index 0000000000..dd039e22ba
--- /dev/null
+++ b/confirmationui/1.0/default/PlatformSpecifics.cpp
@@ -0,0 +1,62 @@
+/*
+**
+** 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 "PlatformSpecifics.h"
+
+#include <openssl/hmac.h>
+#include <openssl/sha.h>
+#include <time.h>
+
+namespace android {
+namespace hardware {
+namespace confirmationui {
+namespace V1_0 {
+namespace implementation {
+
+MonotonicClockTimeStamper::TimeStamp MonotonicClockTimeStamper::now() {
+    timespec ts;
+    if (!clock_gettime(CLOCK_BOOTTIME, &ts)) {
+        return TimeStamp(ts.tv_sec * UINT64_C(1000) + ts.tv_nsec / UINT64_C(1000000));
+    } else {
+        return {};
+    }
+}
+
+support::NullOr<support::array<uint8_t, 32>> HMacImplementation::hmac256(
+    const uint8_t key[32], std::initializer_list<support::ByteBufferProxy> buffers) {
+    HMAC_CTX hmacCtx;
+    HMAC_CTX_init(&hmacCtx);
+    if (!HMAC_Init_ex(&hmacCtx, key, 32, EVP_sha256(), nullptr)) {
+        return {};
+    }
+    for (auto& buffer : buffers) {
+        if (!HMAC_Update(&hmacCtx, buffer.data(), buffer.size())) {
+            return {};
+        }
+    }
+    support::array<uint8_t, 32> result;
+    if (!HMAC_Final(&hmacCtx, result.data(), nullptr)) {
+        return {};
+    }
+    return result;
+}
+
+}  // namespace implementation
+}  // namespace V1_0
+}  // namespace confirmationui
+}  // namespace hardware
+}  // namespace android