| // 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.subtle; |
| |
| import java.security.GeneralSecurityException; |
| |
| /** |
| * This interface for symmetric key ciphers that are indistinguishable against chosen-plaintext |
| * attacks. |
| * |
| * <p>Said primitives do not provide authentication, thus should not be used directly, but only to |
| * construct safer primitives such as {@link com.google.crypto.tink.Aead}. |
| * |
| * @since 1.0.0 |
| */ |
| public interface IndCpaCipher { |
| /** |
| * Encrypts {@code plaintext}. The resulting ciphertext is indistinguishable under |
| * chosen-plaintext attack. However, it does not have integrity protection. |
| * |
| * @return the resulting ciphertext. |
| */ |
| byte[] encrypt(final byte[] plaintext) throws GeneralSecurityException; |
| |
| /** |
| * Decrypts {@code ciphertext}. |
| * |
| * @return the resulting plaintext. |
| */ |
| byte[] decrypt(final byte[] ciphertext) throws GeneralSecurityException; |
| } |