| // Copyright 2020 Google LLC |
| // |
| // Licensed under the Apache License, Version 2.0 (the "License"); |
| // you may not use this file except in compliance with the License. |
| // You may obtain a copy of the License at |
| // |
| // http://www.apache.org/licenses/LICENSE-2.0 |
| // |
| // Unless required by applicable law or agreed to in writing, software |
| // distributed under the License is distributed on an "AS IS" BASIS, |
| // WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. |
| // See the License for the specific language governing permissions and |
| // limitations under the License. |
| // |
| //////////////////////////////////////////////////////////////////////////////// |
| |
| package com.google.crypto.tink; |
| |
| import com.google.crypto.tink.annotations.Alpha; |
| import com.google.crypto.tink.internal.KeyTypeManager; |
| import com.google.crypto.tink.internal.PrivateKeyTypeManager; |
| import com.google.crypto.tink.proto.KeyData; |
| import com.google.protobuf.ByteString; |
| import com.google.protobuf.InvalidProtocolBufferException; |
| import com.google.protobuf.MessageLite; |
| import java.security.GeneralSecurityException; |
| |
| /** |
| * Implementation of the {@link PrivateKeyManager} interface based on an {@link |
| * PrivateKeyTypeManager} and the corresponding public key manager, implemented by an {@link |
| * KeyTypeManager}. |
| * |
| * <p>Choosing {@code PrimitiveT} equal to {@link java.lang.Void} is valid; in this case the |
| * functions {@link #getPrimitive} will throw if invoked. |
| */ |
| @Alpha |
| class PrivateKeyManagerImpl< |
| PrimitiveT, KeyProtoT extends MessageLite, PublicKeyProtoT extends MessageLite> |
| extends KeyManagerImpl<PrimitiveT, KeyProtoT> implements PrivateKeyManager<PrimitiveT> { |
| |
| private final PrivateKeyTypeManager<KeyProtoT, PublicKeyProtoT> privateKeyManager; |
| private final KeyTypeManager<PublicKeyProtoT> publicKeyManager; |
| |
| public PrivateKeyManagerImpl( |
| PrivateKeyTypeManager<KeyProtoT, PublicKeyProtoT> privateKeyManager, |
| KeyTypeManager<PublicKeyProtoT> publicKeyManager, |
| Class<PrimitiveT> primitiveClass) { |
| super(privateKeyManager, primitiveClass); |
| this.privateKeyManager = privateKeyManager; |
| this.publicKeyManager = publicKeyManager; |
| } |
| |
| @Override |
| public KeyData getPublicKeyData(ByteString serializedKey) throws GeneralSecurityException { |
| try { |
| KeyProtoT privKeyProto = privateKeyManager.parseKey(serializedKey); |
| privateKeyManager.validateKey(privKeyProto); |
| PublicKeyProtoT publicKeyProto = privateKeyManager.getPublicKey(privKeyProto); |
| publicKeyManager.validateKey(publicKeyProto); |
| return KeyData.newBuilder() |
| .setTypeUrl(publicKeyManager.getKeyType()) |
| .setValue(publicKeyProto.toByteString()) |
| .setKeyMaterialType(publicKeyManager.keyMaterialType()) |
| .build(); |
| } catch (InvalidProtocolBufferException e) { |
| throw new GeneralSecurityException("expected serialized proto of type ", e); |
| } |
| } |
| } |