chromium/third_party/grpc/src/src/core/lib/security/credentials/tls/grpc_tls_certificate_provider.h

//
// 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_SRC_CORE_LIB_SECURITY_CREDENTIALS_TLS_GRPC_TLS_CERTIFICATE_PROVIDER_H
#define GRPC_SRC_CORE_LIB_SECURITY_CREDENTIALS_TLS_GRPC_TLS_CERTIFICATE_PROVIDER_H

#include <grpc/support/port_platform.h>

#include <stdint.h>

#include <map>
#include <string>

#include "absl/base/thread_annotations.h"
#include "absl/status/statusor.h"
#include "absl/strings/string_view.h"
#include "absl/types/optional.h"

#include <grpc/grpc_security.h>
#include <grpc/support/log.h>
#include <grpc/support/sync.h>

#include "src/core/lib/gpr/useful.h"
#include "src/core/lib/gprpp/ref_counted.h"
#include "src/core/lib/gprpp/ref_counted_ptr.h"
#include "src/core/lib/gprpp/sync.h"
#include "src/core/lib/gprpp/thd.h"
#include "src/core/lib/gprpp/unique_type_name.h"
#include "src/core/lib/iomgr/iomgr_fwd.h"
#include "src/core/lib/security/credentials/tls/grpc_tls_certificate_distributor.h"
#include "src/core/lib/security/security_connector/ssl_utils.h"

// Interface for a grpc_tls_certificate_provider that handles the process to
// fetch credentials and validation contexts. Implementations are free to rely
// on local or remote sources to fetch the latest secrets, and free to share any
// state among different instances as they deem fit.
//
// On creation, grpc_tls_certificate_provider creates a
// grpc_tls_certificate_distributor object. When the credentials and validation
// contexts become valid or changed, a grpc_tls_certificate_provider should
// notify its distributor so as to propagate the update to the watchers.
struct grpc_tls_certificate_provider
    : public grpc_core::RefCounted<grpc_tls_certificate_provider> {};

namespace grpc_core {

// A basic provider class that will get credentials from string during
// initialization.
class StaticDataCertificateProvider final
    : public grpc_tls_certificate_provider {};

// A provider class that will watch the credential changes on the file system.
class FileWatcherCertificateProvider final
    : public grpc_tls_certificate_provider {};

//  Checks if the private key matches the certificate's public key.
//  Returns a not-OK status on failure, or a bool indicating
//  whether the key/cert pair matches.
absl::StatusOr<bool> PrivateKeyAndCertificateMatch(
    absl::string_view private_key, absl::string_view cert_chain);

}  // namespace grpc_core

#endif  // GRPC_SRC_CORE_LIB_SECURITY_CREDENTIALS_TLS_GRPC_TLS_CERTIFICATE_PROVIDER_H