1 // Copyright 2023 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_SIGNATURE_ED25519_PRIVATE_KEY_H_ 18 #define TINK_SIGNATURE_ED25519_PRIVATE_KEY_H_ 19 20 #include "tink/partial_key_access_token.h" 21 #include "tink/restricted_data.h" 22 #include "tink/signature/ed25519_public_key.h" 23 #include "tink/signature/signature_private_key.h" 24 #include "tink/util/statusor.h" 25 26 namespace crypto { 27 namespace tink { 28 29 class Ed25519PrivateKey : public SignaturePrivateKey { 30 public: 31 // Copyable and movable. 32 Ed25519PrivateKey(const Ed25519PrivateKey& other) = default; 33 Ed25519PrivateKey& operator=(const Ed25519PrivateKey& other) = default; 34 Ed25519PrivateKey(Ed25519PrivateKey&& other) = default; 35 Ed25519PrivateKey& operator=(Ed25519PrivateKey&& other) = default; 36 37 // Creates a new Ed25519 private key from `private_key_bytes`. Returns an 38 // error if `public_key` does not belong to the same key pair as 39 // `private_key_bytes`. 40 static util::StatusOr<Ed25519PrivateKey> Create( 41 const Ed25519PublicKey& public_key, 42 const RestrictedData& private_key_bytes, PartialKeyAccessToken token); 43 GetPrivateKeyBytes(PartialKeyAccessToken token)44 const RestrictedData& GetPrivateKeyBytes(PartialKeyAccessToken token) const { 45 return private_key_bytes_; 46 } 47 GetPublicKey()48 const Ed25519PublicKey& GetPublicKey() const override { return public_key_; } 49 50 bool operator==(const Key& other) const override; 51 52 private: Ed25519PrivateKey(const Ed25519PublicKey & public_key,const RestrictedData & private_key_bytes)53 explicit Ed25519PrivateKey(const Ed25519PublicKey& public_key, 54 const RestrictedData& private_key_bytes) 55 : public_key_(public_key), private_key_bytes_(private_key_bytes) {} 56 57 Ed25519PublicKey public_key_; 58 RestrictedData private_key_bytes_; 59 }; 60 61 } // namespace tink 62 } // namespace crypto 63 64 #endif // TINK_SIGNATURE_ED25519_PRIVATE_KEY_H_ 65