| |
| // 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_LIB_SECURITY_AUTHORIZATION_AUTHORIZATION_ENGINE_H |
| #define GRPC_CORE_LIB_SECURITY_AUTHORIZATION_AUTHORIZATION_ENGINE_H |
| |
| #include <grpc/support/port_platform.h> |
| |
| #include <grpc/support/log.h> |
| #include <map> |
| #include <memory> |
| #include <string> |
| #include <vector> |
| |
| #include "absl/container/flat_hash_set.h" |
| #include "envoy/config/rbac/v3/rbac.upb.h" |
| #include "google/api/expr/v1alpha1/syntax.upb.h" |
| #include "upb/upb.hpp" |
| |
| #include "src/core/lib/security/authorization/evaluate_args.h" |
| #include "src/core/lib/security/authorization/mock_cel/activation.h" |
| |
| namespace grpc_core { |
| |
| // AuthorizationEngine makes an AuthorizationDecision to ALLOW or DENY the |
| // current action based on the condition fields in provided RBAC policies. |
| // The engine may be constructed with one or two policies. If two polcies, |
| // the first policy is deny-if-matched and the second is allow-if-matched. |
| // The engine returns UNDECIDED decision if it fails to find a match in any |
| // policy. This engine ignores the principal and permission fields in RBAC |
| // policies. It is the caller's responsibility to provide RBAC policies that |
| // are compatible with this engine. |
| // |
| // Example: |
| // AuthorizationEngine* |
| // auth_engine = AuthorizationEngine::CreateAuthorizationEngine(rbac_policies); |
| // auth_engine->Evaluate(evaluate_args); // returns authorization decision. |
| class AuthorizationEngine { |
| public: |
| // rbac_policies must be a vector containing either a single policy of any |
| // kind, or one deny policy and one allow policy, in that order. |
| static std::unique_ptr<AuthorizationEngine> CreateAuthorizationEngine( |
| const std::vector<envoy_config_rbac_v3_RBAC*>& rbac_policies); |
| |
| // Users should use the CreateAuthorizationEngine factory function |
| // instead of calling the AuthorizationEngine constructor directly. |
| explicit AuthorizationEngine( |
| const std::vector<envoy_config_rbac_v3_RBAC*>& rbac_policies); |
| // TODO(mywang@google.com): add an Evaluate member function. |
| |
| private: |
| enum Action { |
| kAllow, |
| kDeny, |
| }; |
| |
| std::unique_ptr<mock_cel::Activation> CreateActivation( |
| const EvaluateArgs& args); |
| |
| std::map<const std::string, const google_api_expr_v1alpha1_Expr*> |
| deny_if_matched_; |
| std::map<const std::string, const google_api_expr_v1alpha1_Expr*> |
| allow_if_matched_; |
| upb::Arena arena_; |
| absl::flat_hash_set<std::string> envoy_attributes_; |
| absl::flat_hash_set<std::string> header_keys_; |
| std::unique_ptr<mock_cel::CelMap> headers_; |
| }; |
| |
| } // namespace grpc_core |
| |
| #endif /* GRPC_CORE_LIB_SECURITY_AUTHORIZATION_AUTHORIZATION_ENGINE_H */ |