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// Copyright 2022 gRPC authors.
//
// 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 <string>
#include <utility>
#include "absl/status/status.h"
#include "absl/status/statusor.h"
#include "absl/strings/string_view.h"
#include "absl/types/optional.h"
#include "gmock/gmock.h"
#include "gtest/gtest.h"
#include <grpc/grpc.h>
#include <grpc/grpc_security.h>
#include <grpc/grpc_security_constants.h>
#include <grpc/status.h>
#include "src/core/lib/channel/channel_args.h"
#include "src/core/lib/channel/promise_based_filter.h"
#include "src/core/lib/gpr/useful.h"
#include "src/core/lib/gprpp/ref_counted_ptr.h"
#include "src/core/lib/gprpp/unique_type_name.h"
#include "src/core/lib/promise/arena_promise.h"
#include "src/core/lib/promise/promise.h"
#include "src/core/lib/security/context/security_context.h"
#include "src/core/lib/security/credentials/credentials.h"
#include "src/core/lib/security/credentials/fake/fake_credentials.h"
#include "src/core/lib/security/security_connector/security_connector.h"
#include "src/core/lib/security/transport/auth_filters.h"
#include "src/core/lib/transport/transport.h"
#include "test/core/filters/filter_test.h"
// TODO(roth): Need to add a lot more tests here. I created this file
// as part of adding a feature, and I added tests only for the feature I
// was adding. When we have time, we need to go back and write
// comprehensive tests for all of the functionality in the filter.
namespace grpc_core {
namespace {
class ClientAuthFilterTest : public FilterTest<ClientAuthFilter> {
protected:
class FailCallCreds : public grpc_call_credentials {
public:
explicit FailCallCreds(absl::Status status)
: grpc_call_credentials(GRPC_SECURITY_NONE),
status_(std::move(status)) {}
UniqueTypeName type() const override {
static UniqueTypeName::Factory kFactory("FailCallCreds");
return kFactory.Create();
}
ArenaPromise<absl::StatusOr<ClientMetadataHandle>> GetRequestMetadata(
ClientMetadataHandle /*initial_metadata*/,
const GetRequestMetadataArgs* /*args*/) override {
return Immediate<absl::StatusOr<ClientMetadataHandle>>(status_);
}
int cmp_impl(const grpc_call_credentials* other) const override {
return QsortCompare(
status_.ToString(),
static_cast<const FailCallCreds*>(other)->status_.ToString());
}
private:
absl::Status status_;
};
ClientAuthFilterTest()
: channel_creds_(grpc_fake_transport_security_credentials_create()) {}
Channel MakeChannelWithCallCredsResult(absl::Status status) {
return MakeChannel(MakeChannelArgs(std::move(status))).value();
}
ChannelArgs MakeChannelArgs(absl::Status status_for_call_creds) {
ChannelArgs args;
auto security_connector = channel_creds_->create_security_connector(
status_for_call_creds.ok()
? nullptr
: MakeRefCounted<FailCallCreds>(std::move(status_for_call_creds)),
std::string(target()).c_str(), &args);
auto auth_context = MakeRefCounted<grpc_auth_context>(nullptr);
absl::string_view security_level = "TSI_SECURITY_NONE";
auth_context->add_property(GRPC_TRANSPORT_SECURITY_LEVEL_PROPERTY_NAME,
security_level.data(), security_level.size());
return args.SetObject(std::move(security_connector))
.SetObject(std::move(auth_context));
}
absl::string_view target() { return "localhost:1234"; }
RefCountedPtr<grpc_channel_credentials> channel_creds_;
};
TEST_F(ClientAuthFilterTest, CreateFailsWithoutRequiredChannelArgs) {
EXPECT_FALSE(
ClientAuthFilter::Create(ChannelArgs(), ChannelFilter::Args()).ok());
}
TEST_F(ClientAuthFilterTest, CreateSucceeds) {
auto filter = MakeChannel(MakeChannelArgs(absl::OkStatus()));
EXPECT_TRUE(filter.ok()) << filter.status();
}
TEST_F(ClientAuthFilterTest, CallCredsFails) {
Call call(MakeChannelWithCallCredsResult(
absl::UnauthenticatedError("access denied")));
call.Start(call.NewClientMetadata({{":authority", target()}}));
EXPECT_EVENT(Finished(
&call, HasMetadataResult(absl::UnauthenticatedError("access denied"))));
Step();
}
TEST_F(ClientAuthFilterTest, RewritesInvalidStatusFromCallCreds) {
Call call(MakeChannelWithCallCredsResult(absl::AbortedError("nope")));
call.Start(call.NewClientMetadata({{":authority", target()}}));
EXPECT_EVENT(Finished(&call, HasMetadataResult(absl::InternalError(
"Illegal status code from call credentials; "
"original status: ABORTED: nope"))));
Step();
}
} // namespace
} // namespace grpc_core
int main(int argc, char** argv) {
::testing::InitGoogleTest(&argc, argv);
grpc_init();
int retval = RUN_ALL_TESTS();
grpc_shutdown();
return retval;
}
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