mirror of https://github.com/apache/cloudstack.git
110 lines
3.2 KiB
Java
110 lines
3.2 KiB
Java
// Licensed to the Apache Software Foundation (ASF) under one
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// or more contributor license agreements. See the NOTICE file
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// distributed with this work for additional information
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// regarding copyright ownership. The ASF licenses this file
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// to you under the Apache License, Version 2.0 (the
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// "License"); you may not use this file except in compliance
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// the License. You may obtain a copy of the License at
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//
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// http://www.apache.org/licenses/LICENSE-2.0
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//
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// Unless required by applicable law or agreed to in writing,
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// software distributed under the License is distributed on an
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// "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
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// KIND, either express or implied. See the License for the
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// specific language governing permissions and limitations
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// under the License.
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package com.cloud.utils.ssh;
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import java.io.ByteArrayOutputStream;
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import java.security.MessageDigest;
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import java.security.NoSuchAlgorithmException;
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import org.apache.commons.codec.binary.Base64;
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import com.jcraft.jsch.JSch;
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import com.jcraft.jsch.JSchException;
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import com.jcraft.jsch.KeyPair;
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public class SSHKeysHelper {
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private KeyPair keyPair;
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private static final char[] hexChars = { '0','1','2','3','4','5','6','7','8','9','a','b','c','d','e','f' };
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private static String toHexString(byte[] b) {
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StringBuffer sb = new StringBuffer();
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for (int i = 0; i < b.length; i++) {
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sb.append(hexChars[ (int)(((int)b[i] >> 4) & 0x0f)]);
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sb.append(hexChars[ (int)(((int)b[i]) & 0x0f)]);
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}
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return sb.toString();
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}
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public SSHKeysHelper() {
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try {
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keyPair = KeyPair.genKeyPair(new JSch(), KeyPair.RSA);
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} catch (JSchException e) {
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e.printStackTrace();
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}
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}
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public String getPublicKeyFingerPrint() {
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return getPublicKeyFingerprint(getPublicKey());
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}
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public static String getPublicKeyFingerprint(String publicKey) {
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String key[] = publicKey.split(" ");
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if (key.length < 2) {
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throw new RuntimeException("Incorrect public key is passed in");
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}
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byte[] keyBytes = Base64.decodeBase64(key[1]);
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MessageDigest md5 = null;
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try {
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md5 = MessageDigest.getInstance("MD5");
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} catch (NoSuchAlgorithmException e) {
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e.printStackTrace();
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}
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String sumString = toHexString(md5.digest(keyBytes));
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String rString = "";
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for (int i = 2; i <= sumString.length(); i += 2) {
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rString += sumString.substring(i-2, i);
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if (i != sumString.length())
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rString += ":";
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}
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return rString;
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}
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public static String getPublicKeyFromKeyMaterial(String keyMaterial) {
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if (!keyMaterial.contains(" "))
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keyMaterial = new String(Base64.decodeBase64(keyMaterial.getBytes()));
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if ((!keyMaterial.startsWith("ssh-rsa") && !keyMaterial.startsWith("ssh-dss")) || !keyMaterial.contains(" "))
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return null;
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String[] key = keyMaterial.split(" ");
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if (key.length < 2)
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return null;
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return key[0].concat(" ").concat(key[1]);
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}
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public String getPublicKey() {
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ByteArrayOutputStream baos = new ByteArrayOutputStream();
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keyPair.writePublicKey(baos, "");
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return baos.toString();
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}
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public String getPrivateKey() {
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ByteArrayOutputStream baos = new ByteArrayOutputStream();
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keyPair.writePrivateKey(baos);
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return baos.toString();
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}
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}
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