| /* |
| * Licensed to the Apache Software Foundation (ASF) under one or more |
| * contributor license agreements. See the NOTICE file distributed with |
| * this work for additional information regarding copyright ownership. |
| * The ASF licenses this file to You 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 javax.crypto; |
| |
| import java.security.InvalidKeyException; |
| import java.security.spec.InvalidKeySpecException; |
| import java.security.spec.KeySpec; |
| |
| /** |
| * The <i>Service Provider Interface</i> (<b>SPI</b>) definition for the {@code |
| * SecretKeyFactory} class. |
| */ |
| public abstract class SecretKeyFactorySpi { |
| |
| /** |
| * Creates a new {@code SecretKeyFactorySpi} instance. |
| */ |
| public SecretKeyFactorySpi() { |
| } |
| |
| /** |
| * Generate a secret key from the specified key specification. |
| * |
| * @param keySpec |
| * the key specification. |
| * @return a secret key. |
| * @throws InvalidKeySpecException |
| * if the specified key specification cannot be used to generate |
| * a secret key. |
| */ |
| protected abstract SecretKey engineGenerateSecret(KeySpec keySpec) |
| throws InvalidKeySpecException; |
| |
| /** |
| * Returns the key specification of the specified secret key. |
| * |
| * @param key |
| * the secret key to get the specification from. |
| * @param keySpec |
| * the target key specification class. |
| * @return an instance of the specified key specification class. |
| * @throws InvalidKeySpecException |
| * if the specified secret key cannot be transformed into the |
| * requested key specification. |
| */ |
| @SuppressWarnings("unchecked") |
| protected abstract KeySpec engineGetKeySpec(SecretKey key, Class keySpec) |
| throws InvalidKeySpecException; |
| |
| /** |
| * Translates the specified secret key into an instance of the corresponding |
| * key from the provider of this key factory. |
| * |
| * @param key |
| * the secret key to translate. |
| * @return the corresponding translated key. |
| * @throws InvalidKeyException |
| * if the specified key cannot be translated using this key |
| * factory. |
| */ |
| protected abstract SecretKey engineTranslateKey(SecretKey key) |
| throws InvalidKeyException; |
| } |