| /* |
| * 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 org.apache.sshd.common.config.keys.writer; |
| |
| import java.io.IOException; |
| import java.io.OutputStream; |
| import java.security.GeneralSecurityException; |
| import java.security.KeyPair; |
| import java.security.PublicKey; |
| |
| import org.apache.sshd.common.config.keys.loader.PrivateKeyEncryptionContext; |
| |
| /** |
| * A {@code KeyPairResourceWriter} can serialize keys to an external representation. |
| * |
| * @param <OPTIONS> The type of {@link PrivateKeyEncryptionContext} to use with this {@code KeyPairResourceWriter}. |
| */ |
| public interface KeyPairResourceWriter<OPTIONS extends PrivateKeyEncryptionContext> { |
| /** |
| * Writes a serialization of a private key from a given {@link KeyPair} to a given {@link OutputStream}. |
| * |
| * @param key to write the private key of |
| * @param comment to write with the private key |
| * @param options for writing the key; may be {@code null} if no encryption is wanted. The caller |
| * is responsible for clearing the options when no longer needed. If the passphrase |
| * obtained from the context is {@code null} or an empty/blank string (length zero |
| * or containing only whitespace), the key is written unencrypted. |
| * @param out The {@link OutputStream} to write to - recommend using a |
| * {@code SecureByteArrayOutputStream} in order to reduce sensitive data exposure |
| * in memory |
| * @throws GeneralSecurityException if the key is inconsistent or unknown, or the encryption specified cannot be |
| * applied |
| * @throws IOException if the key cannot be written |
| */ |
| void writePrivateKey(KeyPair key, String comment, OPTIONS options, OutputStream out) |
| throws IOException, GeneralSecurityException; |
| |
| /** |
| * Writes a serialization of a public key from a given {@link KeyPair} to a given {@link OutputStream}. |
| * |
| * @param key to write the public key of |
| * @param comment to write with the public key |
| * @param out The {@link OutputStream} to write to - recommend using a |
| * {@code SecureByteArrayOutputStream} in order to reduce sensitive data exposure |
| * in memory |
| * @throws GeneralSecurityException if the key is unknown |
| * @throws IOException if the key cannot be written |
| */ |
| default void writePublicKey(KeyPair key, String comment, OutputStream out) |
| throws IOException, GeneralSecurityException { |
| writePublicKey(key.getPublic(), comment, out); |
| } |
| |
| /** |
| * Writes a serialization of a {@link PublicKey} to a given {@link OutputStream}. |
| * |
| * @param key to write |
| * @param comment to write with the key |
| * @param out The {@link OutputStream} to write to - recommend using a |
| * {@code SecureByteArrayOutputStream} in order to reduce sensitive data exposure |
| * in memory |
| * @throws GeneralSecurityException if the key is unknown |
| * @throws IOException if the key cannot be written |
| */ |
| void writePublicKey(PublicKey key, String comment, OutputStream out) |
| throws IOException, GeneralSecurityException; |
| } |