/*
* Adito
*
* Copyright (C) 2003-2006 3SP LTD. All Rights Reserved
*
* This program is free software; you can redistribute it and/or
* modify it under the terms of the GNU General Public License
* as published by the Free Software Foundation; either version 2 of
* the License, or (at your option) any later version.
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public
* License along with this program; if not, write to the Free Software
* Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
*/
package com.adito.security.pki;
import java.io.File;
import java.io.FileInputStream;
import java.io.IOException;
import java.io.InputStream;
import org.apache.commons.logging.Log;
import org.apache.commons.logging.LogFactory;
import com.maverick.util.ByteArrayReader;
/**
*
*
* @author $author$
*/
public class SshPrivateKeyFile {
private static Log log = LogFactory.getLog(SshPrivateKeyFile.class);
private SshPrivateKeyFormat format;
private byte[] keyblob;
/**
* Creates a new SshPrivateKeyFile object.
*
* @param keyblob
* @param format
*/
protected SshPrivateKeyFile(byte[] keyblob, SshPrivateKeyFormat format) {
this.keyblob = keyblob;
this.format = format;
}
/**
*
*
* @return
*/
public byte[] getBytes() {
return keyblob;
}
/**
*
*
* @param passphrase
*
* @return byte[]
*
* @throws InvalidKeyException
*/
public byte[] getKeyBlob(String passphrase) throws InvalidKeyException {
return format.decryptKeyblob(keyblob, passphrase);
}
/**
*
*
* @param oldPassphrase
* @param newPassphrase
*
* @throws InvalidKeyException
*/
public void changePassphrase(String oldPassphrase, String newPassphrase)
throws InvalidKeyException {
byte[] raw = format.decryptKeyblob(keyblob, oldPassphrase);
keyblob = format.encryptKeyblob(raw, newPassphrase);
}
/**
*
*
* @param formattedKey
*
* @return
*
* @throws InvalidKeyException
*/
public static SshPrivateKeyFile parse(byte[] formattedKey)
throws InvalidKeyException {
if (formattedKey == null) {
throw new InvalidKeyException("Key data is null");
}
if (log.isInfoEnabled())
log.info("Parsing private key file");
// Try the default private key format
SshPrivateKeyFormat format;
format = SshPrivateKeyFormatFactory.newInstance(SshPrivateKeyFormatFactory.getDefaultFormatType());
boolean valid = format.isFormatted(formattedKey);
if (valid) {
return new SshPrivateKeyFile(formattedKey, format);
} else {
throw new InvalidKeyException(
"The key format is not a supported format");
}
}
/**
*
*
* @param keyfile
*
* @return SshPrivateKeyFile
*
* @throws InvalidKeyException
* @throws IOException
*/
public static SshPrivateKeyFile parse(File keyfile)
throws InvalidKeyException, IOException {
return parse(new FileInputStream(keyfile));
}
/**
* @param in
* @return SshPrivateKeyFile
* @throws InvalidKeyException
* @throws IOException
*/
public static SshPrivateKeyFile parse(InputStream in)
throws InvalidKeyException, IOException {
byte[] data = null;
try {
data = new byte[in.available()];
in.read(data);
} finally {
try {
if (in != null) {
in.close();
}
} catch (IOException ex) {
}
}
return parse(data);
}
/**
*
*
* @return
*/
public boolean isPassphraseProtected() {
return format.isPassphraseProtected(keyblob);
}
/*public void changePassphrase(String oldPassphrase, String newPassphrase)
throws InvalidKeyException {
keyblob = format.changePassphrase(keyblob, oldPassphrase, newPassphrase);
}*/
/**
* @param key
* @param passphrase
* @param format
* @return SshPrivateKeyFile
* @throws InvalidKeyException
*/
public static SshPrivateKeyFile create(SshPrivateKey key,
String passphrase, SshPrivateKeyFormat format)
throws InvalidKeyException {
byte[] keyblob = format.encryptKeyblob(key.getEncoded(), passphrase);
return new SshPrivateKeyFile(keyblob, format);
}
/**
*
*
* @param newFormat
* @param passphrase
*
* @throws InvalidKeyException
*/
public void setFormat(SshPrivateKeyFormat newFormat, String passphrase)
throws InvalidKeyException {
byte[] raw = this.format.decryptKeyblob(keyblob, passphrase);
format = newFormat;
keyblob = format.encryptKeyblob(raw, passphrase);
}
/**
*
*
* @return SshPrivateKeyFormat
*/
public SshPrivateKeyFormat getFormat() {
return format;
}
/**
*
*
* @param passphrase
*
* @return SshPrivateKey
*
* @throws InvalidKeyException
*/
public SshPrivateKey toPrivateKey(String passphrase)
throws InvalidKeyException {
byte[] raw = format.decryptKeyblob(keyblob, passphrase);
SshKeyPair pair = SshKeyPairFactory.newInstance(getAlgorithm(raw));
return pair.decodePrivateKey(raw);
}
/**
*
*
* @return String
*/
public String toString() {
return new String(keyblob);
}
/**
* @param raw
* @return String
*/
private String getAlgorithm(byte[] raw) {
try {
ByteArrayReader r = new ByteArrayReader(raw);
return r.readString();
} catch (IOException e) {
return null;
}
}
}