Porting the client <-> HAL interface layer for RPC
This change creates a Device for the IRemotelyProvisionedComponent
interface, in line with the general architecture for how KeyMint is
structured. The Device handles translating calls from the client into
calls to the underlying HAL implementation.
Test: atest VtsHalRemotelyProvisionedComponentTargetTest
Change-Id: I23d9d4df11b64ca41432d098f9852e4976afe7ce
diff --git a/ng/AndroidRemotelyProvisionedComponentDevice.cpp b/ng/AndroidRemotelyProvisionedComponentDevice.cpp
new file mode 100644
index 0000000..0e5387c
--- /dev/null
+++ b/ng/AndroidRemotelyProvisionedComponentDevice.cpp
@@ -0,0 +1,130 @@
+/*
+ * Copyright (C) 2021 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 "AndroidRemotelyProvisionedComponentDevice.h"
+
+#include <assert.h>
+#include <variant>
+
+#include <cppbor.h>
+#include <cppbor_parse.h>
+
+#include <KeyMintUtils.h>
+#include <keymaster/cppcose/cppcose.h>
+#include <keymaster/keymaster_configuration.h>
+
+#include <openssl/bn.h>
+#include <openssl/ec.h>
+#include <openssl/rand.h>
+#include <openssl/x509.h>
+
+namespace aidl::android::hardware::security::keymint {
+
+using ::std::string;
+using ::std::tuple;
+using ::std::unique_ptr;
+using ::std::variant;
+using ::std::vector;
+using bytevec = ::std::vector<uint8_t>;
+
+using namespace cppcose;
+using namespace keymaster;
+
+namespace {
+
+constexpr auto STATUS_FAILED = IRemotelyProvisionedComponent::STATUS_FAILED;
+
+struct AStatusDeleter {
+ void operator()(AStatus* p) { AStatus_delete(p); }
+};
+
+class Status {
+ public:
+ Status() : status_(AStatus_newOk()) {}
+ Status(int32_t errCode, const std::string& errMsg)
+ : status_(AStatus_fromServiceSpecificErrorWithMessage(errCode, errMsg.c_str())) {}
+ explicit Status(const std::string& errMsg)
+ : status_(AStatus_fromServiceSpecificErrorWithMessage(STATUS_FAILED, errMsg.c_str())) {}
+ explicit Status(AStatus* status) : status_(status ? status : AStatus_newOk()) {}
+
+ Status(Status&&) = default;
+ Status(const Status&) = delete;
+
+ operator ::ndk::ScopedAStatus() && { return ndk::ScopedAStatus(status_.release()); }
+
+ bool isOk() const { return AStatus_isOk(status_.get()); }
+
+ const char* getMessage() const { return AStatus_getMessage(status_.get()); }
+
+ private:
+ std::unique_ptr<AStatus, AStatusDeleter> status_;
+};
+
+} // namespace
+
+AndroidRemotelyProvisionedComponentDevice::AndroidRemotelyProvisionedComponentDevice(
+ const std::shared_ptr<AndroidKeyMintDevice>& keymint) {
+ impl_ = keymint->getKeymasterImpl();
+}
+
+ScopedAStatus AndroidRemotelyProvisionedComponentDevice::getHardwareInfo(RpcHardwareInfo* info) {
+ info->versionNumber = 1;
+ info->rpcAuthorName = "Google";
+ info->supportedEekCurve = RpcHardwareInfo::CURVE_25519;
+ return ScopedAStatus::ok();
+}
+
+ScopedAStatus AndroidRemotelyProvisionedComponentDevice::generateEcdsaP256KeyPair(
+ bool testMode, MacedPublicKey* macedPublicKey, bytevec* privateKeyHandle) {
+ GenerateRkpKeyRequest request(impl_->message_version());
+ request.test_mode = testMode;
+ GenerateRkpKeyResponse response(impl_->message_version());
+ impl_->GenerateRkpKey(request, &response);
+ if (response.error != KM_ERROR_OK) {
+ return Status(-static_cast<int32_t>(response.error), "Failure in key generation.");
+ }
+
+ macedPublicKey->macedKey = km_utils::kmBlob2vector(response.maced_public_key);
+ *privateKeyHandle = km_utils::kmBlob2vector(response.key_blob);
+ return ScopedAStatus::ok();
+}
+
+ScopedAStatus AndroidRemotelyProvisionedComponentDevice::generateCertificateRequest(
+ bool testMode, const vector<MacedPublicKey>& keysToSign, const bytevec& endpointEncCertChain,
+ const bytevec& challenge, DeviceInfo* deviceInfo, ProtectedData* protectedData,
+ bytevec* keysToSignMac) {
+ GenerateCsrRequest request(impl_->message_version());
+ request.test_mode = testMode;
+ request.num_keys = keysToSign.size();
+ request.keys_to_sign_array = new KeymasterBlob[keysToSign.size()];
+ for (size_t i = 0; i < keysToSign.size(); i++) {
+ request.SetKeyToSign(i, keysToSign[i].macedKey.data(), keysToSign[i].macedKey.size());
+ }
+ request.SetEndpointEncCertChain(endpointEncCertChain.data(), endpointEncCertChain.size());
+ request.SetChallenge(challenge.data(), challenge.size());
+ GenerateCsrResponse response(impl_->message_version());
+ impl_->GenerateCsr(request, &response);
+
+ if (response.error != KM_ERROR_OK) {
+ return Status(-static_cast<int32_t>(response.error), "Failure in CSR Generation.");
+ }
+ deviceInfo->deviceInfo = km_utils::kmBlob2vector(response.device_info_blob);
+ protectedData->protectedData = km_utils::kmBlob2vector(response.protected_data_blob);
+ *keysToSignMac = km_utils::kmBlob2vector(response.keys_to_sign_mac);
+ return ScopedAStatus::ok();
+}
+
+} // namespace aidl::android::hardware::security::keymint