| // Copyright 2017 Google Inc. |
| // |
| // 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.streamingaead; |
| |
| import com.google.crypto.tink.PrimitiveSet; |
| import com.google.crypto.tink.PrimitiveWrapper; |
| import com.google.crypto.tink.StreamingAead; |
| import java.security.GeneralSecurityException; |
| |
| /** |
| * StreamingAeadWrapper is the implementation of PrimitiveWrapper for the StreamingAead primitive. |
| * |
| * <p>The returned primitive works with a keyset (rather than a single key). To encrypt a plaintext, |
| * it uses the primary key in the keyset. To decrypt, the primitive tries the enabled keys from the |
| * keyset to select the right key for decryption. All keys in a keyset of StreamingAead have type |
| * {@link com.google.crypto.tink.proto.OutputPrefixType#RAW}. |
| */ |
| public final class StreamingAeadWrapper implements PrimitiveWrapper<StreamingAead> { |
| /** |
| * @return a StreamingAead primitive from a {@code keysetHandle}. |
| * @throws GeneralSecurityException |
| */ |
| @Override |
| public StreamingAead wrap(final PrimitiveSet<StreamingAead> primitives) |
| throws GeneralSecurityException { |
| return new StreamingAeadHelper(primitives); |
| } |
| |
| @Override |
| public Class<StreamingAead> getPrimitiveClass() { |
| return StreamingAead.class; |
| } |
| } |