1 // Copyright 2019 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 #ifndef TINK_SIGNATURE_ED25519_SIGN_KEY_MANAGER_H_ 17 #define TINK_SIGNATURE_ED25519_SIGN_KEY_MANAGER_H_ 18 19 #include <memory> 20 #include <string> 21 22 #include "absl/memory/memory.h" 23 #include "absl/strings/str_cat.h" 24 #include "tink/core/private_key_type_manager.h" 25 #include "tink/public_key_sign.h" 26 #include "tink/util/constants.h" 27 #include "tink/util/errors.h" 28 #include "tink/util/input_stream_util.h" 29 #include "tink/util/protobuf_helper.h" 30 #include "tink/util/status.h" 31 #include "tink/util/statusor.h" 32 #include "proto/ed25519.pb.h" 33 34 namespace crypto { 35 namespace tink { 36 37 class Ed25519SignKeyManager 38 : public PrivateKeyTypeManager<google::crypto::tink::Ed25519PrivateKey, 39 google::crypto::tink::Ed25519KeyFormat, 40 google::crypto::tink::Ed25519PublicKey, 41 List<PublicKeySign>> { 42 public: 43 class PublicKeySignFactory : public PrimitiveFactory<PublicKeySign> { 44 crypto::tink::util::StatusOr<std::unique_ptr<PublicKeySign>> Create( 45 const google::crypto::tink::Ed25519PrivateKey& private_key) 46 const override; 47 }; 48 Ed25519SignKeyManager()49 Ed25519SignKeyManager() 50 : PrivateKeyTypeManager(absl::make_unique<PublicKeySignFactory>()) {} 51 get_version()52 uint32_t get_version() const override { return 0; } 53 key_material_type()54 google::crypto::tink::KeyData::KeyMaterialType key_material_type() 55 const override { 56 return google::crypto::tink::KeyData::ASYMMETRIC_PRIVATE; 57 } 58 get_key_type()59 const std::string& get_key_type() const override { return key_type_; } 60 61 crypto::tink::util::Status ValidateKey( 62 const google::crypto::tink::Ed25519PrivateKey& key) const override; 63 64 crypto::tink::util::Status ValidateKeyFormat( 65 const google::crypto::tink::Ed25519KeyFormat& key_format) const override; 66 67 crypto::tink::util::StatusOr<google::crypto::tink::Ed25519PrivateKey> 68 CreateKey( 69 const google::crypto::tink::Ed25519KeyFormat& key_format) const override; 70 71 crypto::tink::util::StatusOr<google::crypto::tink::Ed25519PublicKey> GetPublicKey(const google::crypto::tink::Ed25519PrivateKey & private_key)72 GetPublicKey(const google::crypto::tink::Ed25519PrivateKey& private_key) 73 const override { 74 return private_key.public_key(); 75 } 76 77 crypto::tink::util::StatusOr<google::crypto::tink::Ed25519PrivateKey> 78 DeriveKey(const google::crypto::tink::Ed25519KeyFormat& key_format, 79 InputStream* input_stream) const override; 80 81 private: 82 const std::string key_type_ = 83 absl::StrCat(kTypeGoogleapisCom, 84 google::crypto::tink::Ed25519PrivateKey().GetTypeName()); 85 static constexpr int kEd25519SecretSeedSize = 32; 86 }; 87 88 } // namespace tink 89 } // namespace crypto 90 91 #endif // TINK_SIGNATURE_ED25519_SIGN_KEY_MANAGER_H_ 92