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//
//
// Copyright 2020 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.
//
//
#ifndef GRPC_CORE_EXT_XDS_CERTIFICATE_PROVIDER_STORE_H
#define GRPC_CORE_EXT_XDS_CERTIFICATE_PROVIDER_STORE_H
#include <grpc/support/port_platform.h>
#include <map>
#include "absl/strings/string_view.h"
#include "src/core/ext/xds/certificate_provider_factory.h"
#include "src/core/lib/gprpp/orphanable.h"
#include "src/core/lib/gprpp/ref_counted_ptr.h"
#include "src/core/lib/gprpp/sync.h"
#include "src/core/lib/security/credentials/tls/grpc_tls_certificate_provider.h"
namespace grpc_core {
// Map for xDS based grpc_tls_certificate_provider instances.
class CertificateProviderStore
: public InternallyRefCounted<CertificateProviderStore> {
public:
struct PluginDefinition {
std::string plugin_name;
RefCountedPtr<CertificateProviderFactory::Config> config;
};
// Maps plugin instance (opaque) name to plugin defition.
typedef std::map<std::string, PluginDefinition> PluginDefinitionMap;
explicit CertificateProviderStore(PluginDefinitionMap plugin_config_map)
: plugin_config_map_(std::move(plugin_config_map)) {}
// If a certificate provider corresponding to the instance name \a key is
// found, a ref to the grpc_tls_certificate_provider is returned. If no
// provider is found for the key, a new provider is created from the plugin
// definition map.
// Returns nullptr on failure to get or create a new certificate provider.
RefCountedPtr<grpc_tls_certificate_provider> CreateOrGetCertificateProvider(
absl::string_view key);
void Orphan() override { Unref(); }
private:
// A thin wrapper around `grpc_tls_certificate_provider` which allows removing
// the entry from the CertificateProviderStore when the refcount reaches zero.
class CertificateProviderWrapper : public grpc_tls_certificate_provider {
public:
CertificateProviderWrapper(
RefCountedPtr<grpc_tls_certificate_provider> certificate_provider,
RefCountedPtr<CertificateProviderStore> store, absl::string_view key)
: certificate_provider_(std::move(certificate_provider)),
store_(std::move(store)),
key_(key) {}
~CertificateProviderWrapper() override {
store_->ReleaseCertificateProvider(key_, this);
}
grpc_core::RefCountedPtr<grpc_tls_certificate_distributor> distributor()
const override {
return certificate_provider_->distributor();
}
grpc_pollset_set* interested_parties() const override {
return certificate_provider_->interested_parties();
}
absl::string_view key() const { return key_; }
private:
RefCountedPtr<grpc_tls_certificate_provider> certificate_provider_;
RefCountedPtr<CertificateProviderStore> store_;
absl::string_view key_;
};
RefCountedPtr<CertificateProviderWrapper> CreateCertificateProviderLocked(
absl::string_view key);
// Releases a previously created certificate provider from the certificate
// provider map if the value matches \a wrapper.
void ReleaseCertificateProvider(absl::string_view key,
CertificateProviderWrapper* wrapper);
Mutex mu_;
// Map of plugin configurations
PluginDefinitionMap plugin_config_map_;
// Underlying map for the providers.
std::map<absl::string_view, CertificateProviderWrapper*>
certificate_providers_map_;
};
} // namespace grpc_core
#endif // GRPC_CORE_EXT_XDS_CERTIFICATE_PROVIDER_STORE_H
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