1 files changed, 75 insertions, 0 deletions
diff --git a/rebootescrow/aidl/default/RebootEscrow.cpp b/rebootescrow/aidl/default/RebootEscrow.cpp
new file mode 100644
index 0000000000..94d09010d9
--- /dev/null
+++ b/rebootescrow/aidl/default/RebootEscrow.cpp
@@ -0,0 +1,75 @@
+/*
+ * Copyright (C) 2019 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 <android-base/file.h>
+#include <android-base/logging.h>
+#include <android-base/unique_fd.h>
+
+#include "HadamardUtils.h"
+#include "rebootescrow-impl/RebootEscrow.h"
+
+namespace aidl {
+namespace android {
+namespace hardware {
+namespace rebootescrow {
+
+using ::android::base::unique_fd;
+
+ndk::ScopedAStatus RebootEscrow::storeKey(const std::vector<int8_t>& kek) {
+    int rawFd = TEMP_FAILURE_RETRY(::open(REBOOT_ESCROW_DEVICE, O_WRONLY | O_NOFOLLOW | O_CLOEXEC));
+    unique_fd fd(rawFd);
+    if (fd.get() < 0) {
+        LOG(WARNING) << "Could not open reboot escrow device";
+        return ndk::ScopedAStatus(AStatus_fromExceptionCode(EX_UNSUPPORTED_OPERATION));
+    }
+
+    std::vector<uint8_t> ukek(kek.begin(), kek.end());
+    auto encoded = hadamard::EncodeKey(ukek);
+
+    if (!::android::base::WriteFully(fd, encoded.data(), encoded.size())) {
+        LOG(WARNING) << "Could not write data fully to character device";
+        return ndk::ScopedAStatus(AStatus_fromExceptionCode(EX_UNSUPPORTED_OPERATION));
+    }
+
+    return ndk::ScopedAStatus::ok();
+}
+
+ndk::ScopedAStatus RebootEscrow::retrieveKey(std::vector<int8_t>* _aidl_return) {
+    int rawFd = TEMP_FAILURE_RETRY(::open(REBOOT_ESCROW_DEVICE, O_RDONLY | O_NOFOLLOW | O_CLOEXEC));
+    unique_fd fd(rawFd);
+    if (fd.get() < 0) {
+        LOG(WARNING) << "Could not open reboot escrow device";
+        return ndk::ScopedAStatus(AStatus_fromExceptionCode(EX_UNSUPPORTED_OPERATION));
+    }
+
+    std::string encodedString;
+    if (!::android::base::ReadFdToString(fd, &encodedString)) {
+        LOG(WARNING) << "Could not read device to string";
+        return ndk::ScopedAStatus(AStatus_fromExceptionCode(EX_UNSUPPORTED_OPERATION));
+    }
+
+    std::vector<uint8_t> encodedBytes(encodedString.begin(), encodedString.end());
+    auto keyBytes = hadamard::DecodeKey(encodedBytes);
+
+    std::vector<int8_t> signedKeyBytes(keyBytes.begin(), keyBytes.end());
+    *_aidl_return = signedKeyBytes;
+    return ndk::ScopedAStatus::ok();
+}
+
+}  // namespace rebootescrow
+}  // namespace hardware
+}  // namespace android
+}  // namespace aidl