1 // Copyright 2017 Google Inc. 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_PUBLIC_KEY_SIGN_H_ 18 #define TINK_PUBLIC_KEY_SIGN_H_ 19 20 #include <string> 21 22 #include "absl/strings/string_view.h" 23 #include "tink/util/statusor.h" 24 25 namespace crypto { 26 namespace tink { 27 28 /////////////////////////////////////////////////////////////////////////////// 29 // Interface for public key signing. 30 // Digital Signatures provide functionality of signing data and verification of 31 // the signatures. They are represented by a pair of primitives (interfaces) 32 // 'PublicKeySign' for signing of data, and 'PublicKeyVerify' for verification 33 // of signatures. Implementations of these interfaces are secure against 34 // adaptive chosen-message attacks. Signing data ensures the authenticity and 35 // the integrity of that data, but not its secrecy. 36 class PublicKeySign { 37 public: 38 // Computes the signature for 'data'. 39 virtual crypto::tink::util::StatusOr<std::string> Sign( 40 absl::string_view data) const = 0; 41 42 virtual ~PublicKeySign() = default; 43 }; 44 45 } // namespace tink 46 } // namespace crypto 47 48 #endif // TINK_PUBLIC_KEY_SIGN_H_ 49