mirror of git://gcc.gnu.org/git/gcc.git
318 lines
9.6 KiB
Java
318 lines
9.6 KiB
Java
/* EncryptedPrivateKeyInfo.java -- As in PKCS #8.
|
|
Copyright (C) 2004 Free Software Foundation, Inc.
|
|
|
|
This file is part of GNU Classpath.
|
|
|
|
GNU Classpath 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, or (at your option)
|
|
any later version.
|
|
|
|
GNU Classpath 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 GNU Classpath; see the file COPYING. If not, write to the
|
|
Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA
|
|
02110-1301 USA.
|
|
|
|
Linking this library statically or dynamically with other modules is
|
|
making a combined work based on this library. Thus, the terms and
|
|
conditions of the GNU General Public License cover the whole
|
|
combination.
|
|
|
|
As a special exception, the copyright holders of this library give you
|
|
permission to link this library with independent modules to produce an
|
|
executable, regardless of the license terms of these independent
|
|
modules, and to copy and distribute the resulting executable under
|
|
terms of your choice, provided that you also meet, for each linked
|
|
independent module, the terms and conditions of the license of that
|
|
module. An independent module is a module which is not derived from
|
|
or based on this library. If you modify this library, you may extend
|
|
this exception to your version of the library, but you are not
|
|
obligated to do so. If you do not wish to do so, delete this
|
|
exception statement from your version. */
|
|
|
|
|
|
package javax.crypto;
|
|
|
|
import gnu.java.security.OID;
|
|
import gnu.java.security.der.DER;
|
|
import gnu.java.security.der.DERReader;
|
|
import gnu.java.security.der.DERValue;
|
|
|
|
import java.io.IOException;
|
|
import java.security.AlgorithmParameters;
|
|
import java.security.NoSuchAlgorithmException;
|
|
import java.security.spec.InvalidKeySpecException;
|
|
import java.security.spec.PKCS8EncodedKeySpec;
|
|
import java.util.ArrayList;
|
|
import java.util.List;
|
|
|
|
/**
|
|
* An implementation of the <code>EncryptedPrivateKeyInfo</code> ASN.1
|
|
* type as specified in <a
|
|
* href="http://www.rsasecurity.com/rsalabs/pkcs/pkcs-8/">PKCS #8 -
|
|
* Private-Key Information Syntax Standard</a>.
|
|
*
|
|
* <p>The ASN.1 type <code>EncryptedPrivateKeyInfo</code> is:
|
|
*
|
|
* <blockquote>
|
|
* <pre>EncryptedPrivateKeyInfo ::= SEQUENCE {
|
|
* encryptionAlgorithm EncryptionAlgorithmIdentifier,
|
|
* encryptedData EncryptedData }
|
|
*
|
|
* EncryptionAlgorithmIdentifier ::= AlgorithmIdentifier
|
|
*
|
|
* EncrytpedData ::= OCTET STRING
|
|
*
|
|
* AlgorithmIdentifier ::= SEQUENCE {
|
|
* algorithm OBJECT IDENTIFIER,
|
|
* parameters ANY DEFINED BY algorithm OPTIONAL }</pre>
|
|
* </blockquote>
|
|
*
|
|
* @author Casey Marshall (csm@gnu.org)
|
|
* @since 1.4
|
|
* @see java.security.spec.PKCS8EncodedKeySpec
|
|
*/
|
|
public class EncryptedPrivateKeyInfo
|
|
{
|
|
|
|
// Fields.
|
|
// ------------------------------------------------------------------------
|
|
|
|
/** The encrypted data. */
|
|
private byte[] encryptedData;
|
|
|
|
/** The encoded, encrypted key. */
|
|
private byte[] encoded;
|
|
|
|
/** The OID of the encryption algorithm. */
|
|
private OID algOid;
|
|
|
|
/** The encryption algorithm name. */
|
|
private String algName;
|
|
|
|
/** The encryption algorithm's parameters. */
|
|
private AlgorithmParameters params;
|
|
|
|
/** The encoded ASN.1 algorithm parameters. */
|
|
private byte[] encodedParams;
|
|
|
|
// Constructors.
|
|
// ------------------------------------------------------------------------
|
|
|
|
/**
|
|
* Create a new <code>EncryptedPrivateKeyInfo</code> object from raw
|
|
* encrypted data and the parameters used for encryption.
|
|
*
|
|
* <p>The <code>encryptedData</code> array is cloned.
|
|
*
|
|
* @param params The encryption algorithm parameters.
|
|
* @param encryptedData The encrypted key data.
|
|
* @throws java.lang.IllegalArgumentException If the
|
|
* <code>encryptedData</code> array is empty (zero-length).
|
|
* @throws java.security.NoSuchAlgorithmException If the algorithm
|
|
* specified in the parameters is not supported.
|
|
* @throws java.lang.NullPointerException If <code>encryptedData</code>
|
|
* is null.
|
|
*/
|
|
public EncryptedPrivateKeyInfo(AlgorithmParameters params,
|
|
byte[] encryptedData)
|
|
throws IllegalArgumentException, NoSuchAlgorithmException
|
|
{
|
|
if (encryptedData.length == 0)
|
|
{
|
|
throw new IllegalArgumentException("0-length encryptedData");
|
|
}
|
|
this.params = params;
|
|
algName = params.getAlgorithm ();
|
|
algOid = getOid (algName);
|
|
this.encryptedData = (byte[]) encryptedData.clone();
|
|
}
|
|
|
|
/**
|
|
* Create a new <code>EncryptedPrivateKeyInfo</code> from an encoded
|
|
* representation, parsing the ASN.1 sequence.
|
|
*
|
|
* @param encoded The encoded info.
|
|
* @throws java.io.IOException If parsing the encoded data fails.
|
|
* @throws java.lang.NullPointerException If <code>encoded</code> is
|
|
* null.
|
|
*/
|
|
public EncryptedPrivateKeyInfo(byte[] encoded)
|
|
throws IOException
|
|
{
|
|
this.encoded = (byte[]) encoded.clone();
|
|
decode();
|
|
}
|
|
|
|
/**
|
|
* Create a new <code>EncryptedPrivateKeyInfo</code> from the cipher
|
|
* name and the encrytpedData.
|
|
*
|
|
* <p>The <code>encryptedData</code> array is cloned.
|
|
*
|
|
* @param algName The name of the algorithm (as an object identifier).
|
|
* @param encryptedData The encrypted key data.
|
|
* @throws java.lang.IllegalArgumentException If the
|
|
* <code>encryptedData</code> array is empty (zero-length).
|
|
* @throws java.security.NoSuchAlgorithmException If algName is not
|
|
* the name of a supported algorithm.
|
|
* @throws java.lang.NullPointerException If <code>encryptedData</code>
|
|
* is null.
|
|
*/
|
|
public EncryptedPrivateKeyInfo(String algName, byte[] encryptedData)
|
|
throws IllegalArgumentException, NoSuchAlgorithmException,
|
|
NullPointerException
|
|
{
|
|
if (encryptedData.length == 0)
|
|
{
|
|
throw new IllegalArgumentException("0-length encryptedData");
|
|
}
|
|
this.algName = algName.toString (); // do NP check
|
|
this.algOid = getOid (algName);
|
|
this.encryptedData = (byte[]) encryptedData.clone();
|
|
}
|
|
|
|
/**
|
|
* Return the OID for the given cipher name.
|
|
*
|
|
* @param str The string.
|
|
* @throws NoSuchAlgorithmException If the OID is not known.
|
|
*/
|
|
private static OID getOid (final String str)
|
|
throws NoSuchAlgorithmException
|
|
{
|
|
if (str.equalsIgnoreCase ("DSA"))
|
|
{
|
|
return new OID ("1.2.840.10040.4.3");
|
|
}
|
|
// FIXME add more
|
|
|
|
try
|
|
{
|
|
return new OID (str);
|
|
}
|
|
catch (Throwable t)
|
|
{
|
|
}
|
|
throw new NoSuchAlgorithmException ("cannot determine OID for '" + str + "'");
|
|
}
|
|
|
|
// Instance methods.
|
|
// ------------------------------------------------------------------------
|
|
|
|
/**
|
|
* Return the name of the cipher used to encrypt this key.
|
|
*
|
|
* @return The algorithm name.
|
|
*/
|
|
public String getAlgName()
|
|
{
|
|
return algOid.toString();
|
|
}
|
|
|
|
public AlgorithmParameters getAlgParameters()
|
|
{
|
|
if (params == null && encodedParams != null)
|
|
{
|
|
try
|
|
{
|
|
params = AlgorithmParameters.getInstance(getAlgName());
|
|
params.init(encodedParams);
|
|
}
|
|
catch (NoSuchAlgorithmException ignore)
|
|
{
|
|
// FIXME throw exception?
|
|
}
|
|
catch (IOException ignore)
|
|
{
|
|
}
|
|
}
|
|
return params;
|
|
}
|
|
|
|
public synchronized byte[] getEncoded() throws IOException
|
|
{
|
|
if (encoded == null) encode();
|
|
return (byte[]) encoded.clone();
|
|
}
|
|
|
|
public byte[] getEncryptedData()
|
|
{
|
|
return encryptedData;
|
|
}
|
|
|
|
public PKCS8EncodedKeySpec getKeySpec(Cipher cipher)
|
|
throws InvalidKeySpecException
|
|
{
|
|
try
|
|
{
|
|
return new PKCS8EncodedKeySpec(cipher.doFinal(encryptedData));
|
|
}
|
|
catch (Exception x)
|
|
{
|
|
throw new InvalidKeySpecException(x.toString());
|
|
}
|
|
}
|
|
|
|
// Own methods.
|
|
// -------------------------------------------------------------------------
|
|
|
|
private void decode() throws IOException
|
|
{
|
|
DERReader der = new DERReader(encoded);
|
|
DERValue val = der.read();
|
|
if (val.getTag() != DER.SEQUENCE)
|
|
throw new IOException("malformed EncryptedPrivateKeyInfo");
|
|
val = der.read();
|
|
if (val.getTag() != DER.SEQUENCE)
|
|
throw new IOException("malformed AlgorithmIdentifier");
|
|
int algpLen = val.getLength();
|
|
DERValue oid = der.read();
|
|
if (oid.getTag() != DER.OBJECT_IDENTIFIER)
|
|
throw new IOException("malformed AlgorithmIdentifier");
|
|
algOid = (OID) oid.getValue();
|
|
if (algpLen == 0)
|
|
{
|
|
val = der.read();
|
|
if (val.getTag() != 0)
|
|
{
|
|
encodedParams = val.getEncoded();
|
|
der.read();
|
|
}
|
|
}
|
|
else if (oid.getEncodedLength() < val.getLength())
|
|
{
|
|
val = der.read();
|
|
encodedParams = val.getEncoded();
|
|
}
|
|
val = der.read();
|
|
if (val.getTag() != DER.OCTET_STRING)
|
|
throw new IOException("malformed AlgorithmIdentifier");
|
|
encryptedData = (byte[]) val.getValue();
|
|
}
|
|
|
|
private void encode() throws IOException
|
|
{
|
|
List algId = new ArrayList(2);
|
|
algId.add(new DERValue(DER.OBJECT_IDENTIFIER, algOid));
|
|
getAlgParameters();
|
|
if (params != null)
|
|
{
|
|
algId.add (DERReader.read (params.getEncoded()));
|
|
}
|
|
else
|
|
{
|
|
algId.add (new DERValue (DER.NULL, null));
|
|
}
|
|
List epki = new ArrayList(2);
|
|
epki.add(new DERValue(DER.CONSTRUCTED|DER.SEQUENCE, algId));
|
|
epki.add(new DERValue(DER.OCTET_STRING, encryptedData));
|
|
encoded = new DERValue(DER.CONSTRUCTED|DER.SEQUENCE, epki).getEncoded();
|
|
}
|
|
}
|