1 // 2 // 3 // Copyright 2016 gRPC authors. 4 // 5 // Licensed under the Apache License, Version 2.0 (the "License"); 6 // you may not use this file except in compliance with the License. 7 // You may obtain a copy of the License at 8 // 9 // http://www.apache.org/licenses/LICENSE-2.0 10 // 11 // Unless required by applicable law or agreed to in writing, software 12 // distributed under the License is distributed on an "AS IS" BASIS, 13 // WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. 14 // See the License for the specific language governing permissions and 15 // limitations under the License. 16 // 17 // 18 19 #ifndef GRPC_SRC_CORE_LIB_SECURITY_CREDENTIALS_JWT_JWT_CREDENTIALS_H 20 #define GRPC_SRC_CORE_LIB_SECURITY_CREDENTIALS_JWT_JWT_CREDENTIALS_H 21 22 #include <grpc/support/port_platform.h> 23 24 #include <stdint.h> 25 26 #include <initializer_list> 27 #include <string> 28 29 #include "absl/status/statusor.h" 30 #include "absl/strings/str_format.h" 31 #include "absl/strings/string_view.h" 32 #include "absl/time/time.h" 33 #include "absl/types/optional.h" 34 35 #include <grpc/grpc_security.h> 36 #include <grpc/support/sync.h> 37 #include <grpc/support/time.h> 38 39 #include "src/core/lib/gpr/useful.h" 40 #include "src/core/lib/gprpp/ref_counted_ptr.h" 41 #include "src/core/lib/gprpp/unique_type_name.h" 42 #include "src/core/lib/promise/arena_promise.h" 43 #include "src/core/lib/security/credentials/credentials.h" 44 #include "src/core/lib/security/credentials/jwt/json_token.h" 45 #include "src/core/lib/slice/slice.h" 46 #include "src/core/lib/transport/transport.h" 47 48 class grpc_service_account_jwt_access_credentials 49 : public grpc_call_credentials { 50 public: 51 grpc_service_account_jwt_access_credentials(grpc_auth_json_key key, 52 gpr_timespec token_lifetime); 53 ~grpc_service_account_jwt_access_credentials() override; 54 55 grpc_core::ArenaPromise<absl::StatusOr<grpc_core::ClientMetadataHandle>> 56 GetRequestMetadata(grpc_core::ClientMetadataHandle initial_metadata, 57 const GetRequestMetadataArgs* args) override; 58 jwt_lifetime()59 const gpr_timespec& jwt_lifetime() const { return jwt_lifetime_; } key()60 const grpc_auth_json_key& key() const { return key_; } 61 debug_string()62 std::string debug_string() override { 63 return absl::StrFormat( 64 "JWTAccessCredentials{ExpirationTime:%s}", 65 absl::FormatTime(absl::FromUnixMicros( 66 static_cast<int64_t>(gpr_timespec_to_micros(jwt_lifetime_))))); 67 }; 68 69 static grpc_core::UniqueTypeName Type(); 70 type()71 grpc_core::UniqueTypeName type() const override { return Type(); } 72 73 private: cmp_impl(const grpc_call_credentials * other)74 int cmp_impl(const grpc_call_credentials* other) const override { 75 // TODO(yashykt): Check if we can do something better here 76 return grpc_core::QsortCompare( 77 static_cast<const grpc_call_credentials*>(this), other); 78 } 79 80 // Have a simple cache for now with just 1 entry. We could have a map based on 81 // the service_url for a more sophisticated one. 82 gpr_mu cache_mu_; 83 struct Cache { 84 grpc_core::Slice jwt_value; 85 std::string service_url; 86 gpr_timespec jwt_expiration; 87 }; 88 absl::optional<Cache> cached_; 89 90 grpc_auth_json_key key_; 91 gpr_timespec jwt_lifetime_; 92 }; 93 94 // Private constructor for jwt credentials from an already parsed json key. 95 // Takes ownership of the key. 96 grpc_core::RefCountedPtr<grpc_call_credentials> 97 grpc_service_account_jwt_access_credentials_create_from_auth_json_key( 98 grpc_auth_json_key key, gpr_timespec token_lifetime); 99 100 namespace grpc_core { 101 102 // Exposed for testing purposes only. 103 absl::StatusOr<std::string> RemoveServiceNameFromJwtUri(absl::string_view uri); 104 105 } // namespace grpc_core 106 107 #endif // GRPC_SRC_CORE_LIB_SECURITY_CREDENTIALS_JWT_JWT_CREDENTIALS_H 108