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/*
*
* Copyright 2016 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 "test/cpp/util/test_credentials_provider.h"
#include <cstdio>
#include <fstream>
#include <iostream>
#include <mutex>
#include <unordered_map>
#include "absl/flags/flag.h"
#include <grpc/support/log.h>
#include <grpc/support/sync.h>
#include <grpcpp/security/server_credentials.h>
#include "test/core/end2end/data/ssl_test_data.h"
ABSL_FLAG(std::string, tls_cert_file, "",
"The TLS cert file used when --use_tls=true");
ABSL_FLAG(std::string, tls_key_file, "",
"The TLS key file used when --use_tls=true");
namespace grpc {
namespace testing {
namespace {
std::string ReadFile(const std::string& src_path) {
std::ifstream src;
src.open(src_path, std::ifstream::in | std::ifstream::binary);
std::string contents;
src.seekg(0, std::ios::end);
contents.reserve(src.tellg());
src.seekg(0, std::ios::beg);
contents.assign((std::istreambuf_iterator<char>(src)),
(std::istreambuf_iterator<char>()));
return contents;
}
class DefaultCredentialsProvider : public CredentialsProvider {
public:
DefaultCredentialsProvider() {
if (!absl::GetFlag(FLAGS_tls_key_file).empty()) {
custom_server_key_ = ReadFile(absl::GetFlag(FLAGS_tls_key_file));
}
if (!absl::GetFlag(FLAGS_tls_cert_file).empty()) {
custom_server_cert_ = ReadFile(absl::GetFlag(FLAGS_tls_cert_file));
}
}
~DefaultCredentialsProvider() override {}
void AddSecureType(
const std::string& type,
std::unique_ptr<CredentialTypeProvider> type_provider) override {
// This clobbers any existing entry for type, except the defaults, which
// can't be clobbered.
std::unique_lock<std::mutex> lock(mu_);
auto it = std::find(added_secure_type_names_.begin(),
added_secure_type_names_.end(), type);
if (it == added_secure_type_names_.end()) {
added_secure_type_names_.push_back(type);
added_secure_type_providers_.push_back(std::move(type_provider));
} else {
added_secure_type_providers_[it - added_secure_type_names_.begin()] =
std::move(type_provider);
}
}
std::shared_ptr<ChannelCredentials> GetChannelCredentials(
const std::string& type, ChannelArguments* args) override {
if (type == grpc::testing::kInsecureCredentialsType) {
return InsecureChannelCredentials();
} else if (type == grpc::testing::kAltsCredentialsType) {
grpc::experimental::AltsCredentialsOptions alts_opts;
return grpc::experimental::AltsCredentials(alts_opts);
} else if (type == grpc::testing::kTlsCredentialsType) {
SslCredentialsOptions ssl_opts = {test_root_cert, "", ""};
args->SetSslTargetNameOverride("foo.test.google.fr");
return grpc::SslCredentials(ssl_opts);
} else if (type == grpc::testing::kGoogleDefaultCredentialsType) {
return grpc::GoogleDefaultCredentials();
} else {
std::unique_lock<std::mutex> lock(mu_);
auto it(std::find(added_secure_type_names_.begin(),
added_secure_type_names_.end(), type));
if (it == added_secure_type_names_.end()) {
gpr_log(GPR_ERROR, "Unsupported credentials type %s.", type.c_str());
return nullptr;
}
return added_secure_type_providers_[it - added_secure_type_names_.begin()]
->GetChannelCredentials(args);
}
}
std::shared_ptr<ServerCredentials> GetServerCredentials(
const std::string& type) override {
if (type == grpc::testing::kInsecureCredentialsType) {
return InsecureServerCredentials();
} else if (type == grpc::testing::kAltsCredentialsType) {
grpc::experimental::AltsServerCredentialsOptions alts_opts;
return grpc::experimental::AltsServerCredentials(alts_opts);
} else if (type == grpc::testing::kTlsCredentialsType) {
SslServerCredentialsOptions ssl_opts;
ssl_opts.pem_root_certs = "";
if (!custom_server_key_.empty() && !custom_server_cert_.empty()) {
SslServerCredentialsOptions::PemKeyCertPair pkcp = {
custom_server_key_, custom_server_cert_};
ssl_opts.pem_key_cert_pairs.push_back(pkcp);
} else {
SslServerCredentialsOptions::PemKeyCertPair pkcp = {test_server1_key,
test_server1_cert};
ssl_opts.pem_key_cert_pairs.push_back(pkcp);
}
return SslServerCredentials(ssl_opts);
} else {
std::unique_lock<std::mutex> lock(mu_);
auto it(std::find(added_secure_type_names_.begin(),
added_secure_type_names_.end(), type));
if (it == added_secure_type_names_.end()) {
gpr_log(GPR_ERROR, "Unsupported credentials type %s.", type.c_str());
return nullptr;
}
return added_secure_type_providers_[it - added_secure_type_names_.begin()]
->GetServerCredentials();
}
}
std::vector<std::string> GetSecureCredentialsTypeList() override {
std::vector<std::string> types;
types.push_back(grpc::testing::kTlsCredentialsType);
std::unique_lock<std::mutex> lock(mu_);
for (auto it = added_secure_type_names_.begin();
it != added_secure_type_names_.end(); it++) {
types.push_back(*it);
}
return types;
}
private:
std::mutex mu_;
std::vector<std::string> added_secure_type_names_;
std::vector<std::unique_ptr<CredentialTypeProvider>>
added_secure_type_providers_;
std::string custom_server_key_;
std::string custom_server_cert_;
};
CredentialsProvider* g_provider = nullptr;
} // namespace
CredentialsProvider* GetCredentialsProvider() {
if (g_provider == nullptr) {
g_provider = new DefaultCredentialsProvider;
}
return g_provider;
}
void SetCredentialsProvider(CredentialsProvider* provider) {
// For now, forbids overriding provider.
GPR_ASSERT(g_provider == nullptr);
g_provider = provider;
}
} // namespace testing
} // namespace grpc
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