1*e7b1675dSTing-Kang Chang // Copyright 2017 Google Inc. 2*e7b1675dSTing-Kang Chang // 3*e7b1675dSTing-Kang Chang // Licensed under the Apache License, Version 2.0 (the "License"); 4*e7b1675dSTing-Kang Chang // you may not use this file except in compliance with the License. 5*e7b1675dSTing-Kang Chang // You may obtain a copy of the License at 6*e7b1675dSTing-Kang Chang // 7*e7b1675dSTing-Kang Chang // http://www.apache.org/licenses/LICENSE-2.0 8*e7b1675dSTing-Kang Chang // 9*e7b1675dSTing-Kang Chang // Unless required by applicable law or agreed to in writing, software 10*e7b1675dSTing-Kang Chang // distributed under the License is distributed on an "AS IS" BASIS, 11*e7b1675dSTing-Kang Chang // WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. 12*e7b1675dSTing-Kang Chang // See the License for the specific language governing permissions and 13*e7b1675dSTing-Kang Chang // limitations under the License. 14*e7b1675dSTing-Kang Chang // 15*e7b1675dSTing-Kang Chang /////////////////////////////////////////////////////////////////////////////// 16*e7b1675dSTing-Kang Chang 17*e7b1675dSTing-Kang Chang #ifndef TINK_PUBLIC_KEY_SIGN_H_ 18*e7b1675dSTing-Kang Chang #define TINK_PUBLIC_KEY_SIGN_H_ 19*e7b1675dSTing-Kang Chang 20*e7b1675dSTing-Kang Chang #include <string> 21*e7b1675dSTing-Kang Chang 22*e7b1675dSTing-Kang Chang #include "absl/strings/string_view.h" 23*e7b1675dSTing-Kang Chang #include "tink/util/statusor.h" 24*e7b1675dSTing-Kang Chang 25*e7b1675dSTing-Kang Chang namespace crypto { 26*e7b1675dSTing-Kang Chang namespace tink { 27*e7b1675dSTing-Kang Chang 28*e7b1675dSTing-Kang Chang /////////////////////////////////////////////////////////////////////////////// 29*e7b1675dSTing-Kang Chang // Interface for public key signing. 30*e7b1675dSTing-Kang Chang // Digital Signatures provide functionality of signing data and verification of 31*e7b1675dSTing-Kang Chang // the signatures. They are represented by a pair of primitives (interfaces) 32*e7b1675dSTing-Kang Chang // 'PublicKeySign' for signing of data, and 'PublicKeyVerify' for verification 33*e7b1675dSTing-Kang Chang // of signatures. Implementations of these interfaces are secure against 34*e7b1675dSTing-Kang Chang // adaptive chosen-message attacks. Signing data ensures the authenticity and 35*e7b1675dSTing-Kang Chang // the integrity of that data, but not its secrecy. 36*e7b1675dSTing-Kang Chang class PublicKeySign { 37*e7b1675dSTing-Kang Chang public: 38*e7b1675dSTing-Kang Chang // Computes the signature for 'data'. 39*e7b1675dSTing-Kang Chang virtual crypto::tink::util::StatusOr<std::string> Sign( 40*e7b1675dSTing-Kang Chang absl::string_view data) const = 0; 41*e7b1675dSTing-Kang Chang 42*e7b1675dSTing-Kang Chang virtual ~PublicKeySign() = default; 43*e7b1675dSTing-Kang Chang }; 44*e7b1675dSTing-Kang Chang 45*e7b1675dSTing-Kang Chang } // namespace tink 46*e7b1675dSTing-Kang Chang } // namespace crypto 47*e7b1675dSTing-Kang Chang 48*e7b1675dSTing-Kang Chang #endif // TINK_PUBLIC_KEY_SIGN_H_ 49