1 // Copyright 2018 Google LLC 2 // 3 // Licensed under the Apache License, Version 2.0 (the "License"); 4 // you may not use this file except in compliance with the License. 5 // You may obtain a copy of the License at 6 // 7 // http://www.apache.org/licenses/LICENSE-2.0 8 // 9 // Unless required by applicable law or agreed to in writing, software 10 // distributed under the License is distributed on an "AS IS" BASIS, 11 // WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. 12 // See the License for the specific language governing permissions and 13 // limitations under the License. 14 // 15 /////////////////////////////////////////////////////////////////////////////// 16 17 #ifndef TINK_KMS_CLIENT_H_ 18 #define TINK_KMS_CLIENT_H_ 19 20 #include <memory> 21 22 #include "absl/strings/string_view.h" 23 #include "tink/aead.h" 24 #include "tink/util/statusor.h" 25 26 namespace crypto { 27 namespace tink { 28 29 // KmsClient knows how to produce primitives backed by keys stored 30 // in remote KMS services. 31 class KmsClient { 32 public: 33 // Returns true iff this client does support KMS key specified by 'key_uri'. 34 virtual bool DoesSupport(absl::string_view key_uri) const = 0; 35 36 // Returns an Aead-primitive backed by KMS key specified by 'key_uri', 37 // provided that this KmsClient does support 'key_uri'. 38 virtual crypto::tink::util::StatusOr<std::unique_ptr<Aead>> 39 GetAead(absl::string_view key_uri) const = 0; 40 41 virtual ~KmsClient() = default; 42 }; 43 44 } // namespace tink 45 } // namespace crypto 46 47 #endif // TINK_KMS_CLIENT_H_ 48