mirror of
https://github.com/openjdk/jdk.git
synced 2026-04-08 14:08:48 +00:00
241 lines
8.2 KiB
Java
241 lines
8.2 KiB
Java
/*
|
|
* Copyright (c) 2006, 2023, Oracle and/or its affiliates. All rights reserved.
|
|
* DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
|
|
*
|
|
* This code is free software; you can redistribute it and/or modify it
|
|
* under the terms of the GNU General Public License version 2 only, as
|
|
* published by the Free Software Foundation. Oracle designates this
|
|
* particular file as subject to the "Classpath" exception as provided
|
|
* by Oracle in the LICENSE file that accompanied this code.
|
|
*
|
|
* This code 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
|
|
* version 2 for more details (a copy is included in the LICENSE file that
|
|
* accompanied this code).
|
|
*
|
|
* You should have received a copy of the GNU General Public License version
|
|
* 2 along with this work; if not, write to the Free Software Foundation,
|
|
* Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
|
|
*
|
|
* Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
|
|
* or visit www.oracle.com if you need additional information or have any
|
|
* questions.
|
|
*/
|
|
|
|
package sun.security.ec;
|
|
|
|
import java.io.IOException;
|
|
import java.io.InvalidObjectException;
|
|
import java.io.ObjectInputStream;
|
|
import java.math.BigInteger;
|
|
|
|
import java.security.*;
|
|
import java.security.interfaces.*;
|
|
import java.security.spec.*;
|
|
import java.util.Arrays;
|
|
|
|
import sun.security.ec.point.AffinePoint;
|
|
import sun.security.ec.point.MutablePoint;
|
|
import sun.security.util.*;
|
|
import sun.security.x509.AlgorithmId;
|
|
import sun.security.pkcs.PKCS8Key;
|
|
|
|
/**
|
|
* Key implementation for EC private keys.
|
|
* <p>
|
|
* ASN.1 syntax for EC private keys from SEC 1 v1.5 (draft):
|
|
*
|
|
* <pre>
|
|
* EXPLICIT TAGS
|
|
*
|
|
* ECPrivateKey ::= SEQUENCE {
|
|
* version INTEGER { ecPrivkeyVer1(1) } (ecPrivkeyVer1),
|
|
* privateKey OCTET STRING,
|
|
* parameters [0] ECDomainParameters {{ SECGCurveNames }} OPTIONAL,
|
|
* publicKey [1] BIT STRING OPTIONAL
|
|
* }
|
|
* </pre>
|
|
*
|
|
* We currently ignore the optional parameters and publicKey fields. We
|
|
* require that the parameters are encoded as part of the AlgorithmIdentifier,
|
|
* not in the private key structure.
|
|
*
|
|
* @since 1.6
|
|
* @author Andreas Sterbenz
|
|
*/
|
|
public final class ECPrivateKeyImpl extends PKCS8Key implements ECPrivateKey {
|
|
|
|
@java.io.Serial
|
|
private static final long serialVersionUID = 88695385615075129L;
|
|
|
|
private BigInteger s; // private value
|
|
private byte[] arrayS; // private value as a little-endian array
|
|
@SuppressWarnings("serial") // Type of field is not Serializable
|
|
private ECParameterSpec params;
|
|
|
|
/**
|
|
* Construct a key from its encoding. Called by the ECKeyFactory.
|
|
*/
|
|
ECPrivateKeyImpl(byte[] encoded) throws InvalidKeyException {
|
|
super(encoded);
|
|
parseKeyBits();
|
|
}
|
|
|
|
/**
|
|
* Construct a key from its components. Used by the
|
|
* KeyFactory.
|
|
*/
|
|
ECPrivateKeyImpl(BigInteger s, ECParameterSpec params)
|
|
throws InvalidKeyException {
|
|
this.s = s;
|
|
this.params = params;
|
|
makeEncoding(s);
|
|
|
|
}
|
|
|
|
ECPrivateKeyImpl(byte[] s, ECParameterSpec params)
|
|
throws InvalidKeyException {
|
|
this.arrayS = s.clone();
|
|
this.params = params;
|
|
makeEncoding(s);
|
|
}
|
|
|
|
private void makeEncoding(byte[] s) throws InvalidKeyException {
|
|
algid = new AlgorithmId
|
|
(AlgorithmId.EC_oid, ECParameters.getAlgorithmParameters(params));
|
|
DerOutputStream out = new DerOutputStream();
|
|
out.putInteger(1); // version 1
|
|
byte[] privBytes = s.clone();
|
|
ArrayUtil.reverse(privBytes);
|
|
out.putOctetString(privBytes);
|
|
Arrays.fill(privBytes, (byte) 0);
|
|
DerValue val = DerValue.wrap(DerValue.tag_Sequence, out);
|
|
key = val.toByteArray();
|
|
val.clear();
|
|
}
|
|
|
|
private void makeEncoding(BigInteger s) throws InvalidKeyException {
|
|
algid = new AlgorithmId(AlgorithmId.EC_oid,
|
|
ECParameters.getAlgorithmParameters(params));
|
|
byte[] sArr = s.toByteArray();
|
|
// convert to fixed-length array
|
|
int numOctets = (params.getOrder().bitLength() + 7) / 8;
|
|
byte[] sOctets = new byte[numOctets];
|
|
int inPos = Math.max(sArr.length - sOctets.length, 0);
|
|
int outPos = Math.max(sOctets.length - sArr.length, 0);
|
|
int length = Math.min(sArr.length, sOctets.length);
|
|
System.arraycopy(sArr, inPos, sOctets, outPos, length);
|
|
Arrays.fill(sArr, (byte) 0);
|
|
|
|
DerOutputStream out = new DerOutputStream();
|
|
out.putInteger(1); // version 1
|
|
out.putOctetString(sOctets);
|
|
Arrays.fill(sOctets, (byte) 0);
|
|
DerValue val = DerValue.wrap(DerValue.tag_Sequence, out);
|
|
key = val.toByteArray();
|
|
val.clear();
|
|
}
|
|
|
|
// see JCA doc
|
|
public String getAlgorithm() {
|
|
return "EC";
|
|
}
|
|
|
|
// see JCA doc
|
|
public BigInteger getS() {
|
|
if (s == null) {
|
|
byte[] arrCopy = arrayS.clone();
|
|
ArrayUtil.reverse(arrCopy);
|
|
s = new BigInteger(1, arrCopy);
|
|
Arrays.fill(arrCopy, (byte)0);
|
|
}
|
|
return s;
|
|
}
|
|
|
|
private byte[] getArrayS0() {
|
|
if (arrayS == null) {
|
|
arrayS = ECUtil.sArray(getS(), params);
|
|
}
|
|
return arrayS;
|
|
}
|
|
|
|
public byte[] getArrayS() {
|
|
return getArrayS0().clone();
|
|
}
|
|
|
|
// see JCA doc
|
|
public ECParameterSpec getParams() {
|
|
return params;
|
|
}
|
|
|
|
private void parseKeyBits() throws InvalidKeyException {
|
|
try {
|
|
DerInputStream in = new DerInputStream(key);
|
|
DerValue derValue = in.getDerValue();
|
|
if (derValue.tag != DerValue.tag_Sequence) {
|
|
throw new IOException("Not a SEQUENCE");
|
|
}
|
|
DerInputStream data = derValue.data;
|
|
int version = data.getInteger();
|
|
if (version != 1) {
|
|
throw new IOException("Version must be 1");
|
|
}
|
|
byte[] privData = data.getOctetString();
|
|
ArrayUtil.reverse(privData);
|
|
arrayS = privData;
|
|
while (data.available() != 0) {
|
|
DerValue value = data.getDerValue();
|
|
if (value.isContextSpecific((byte) 0)) {
|
|
// ignore for now
|
|
} else if (value.isContextSpecific((byte) 1)) {
|
|
// ignore for now
|
|
} else {
|
|
throw new InvalidKeyException("Unexpected value: " + value);
|
|
}
|
|
}
|
|
AlgorithmParameters algParams = this.algid.getParameters();
|
|
if (algParams == null) {
|
|
throw new InvalidKeyException("EC domain parameters must be "
|
|
+ "encoded in the algorithm identifier");
|
|
}
|
|
params = algParams.getParameterSpec(ECParameterSpec.class);
|
|
} catch (IOException | InvalidParameterSpecException e) {
|
|
throw new InvalidKeyException("Invalid EC private key", e);
|
|
}
|
|
}
|
|
|
|
@Override
|
|
public PublicKey calculatePublicKey() {
|
|
ECParameterSpec ecParams = getParams();
|
|
ECOperations ops = ECOperations.forParameters(ecParams)
|
|
.orElseThrow(ProviderException::new);
|
|
MutablePoint pub = ops.multiply(ecParams.getGenerator(), getArrayS0());
|
|
AffinePoint affPub = pub.asAffine();
|
|
ECPoint w = new ECPoint(affPub.getX().asBigInteger(),
|
|
affPub.getY().asBigInteger());
|
|
try {
|
|
return new ECPublicKeyImpl(w, ecParams);
|
|
} catch (InvalidKeyException e) {
|
|
throw new ProviderException(
|
|
"Unexpected error calculating public key", e);
|
|
}
|
|
}
|
|
|
|
/**
|
|
* Restores the state of this object from the stream.
|
|
* <p>
|
|
* Deserialization of this object is not supported.
|
|
*
|
|
* @param stream the {@code ObjectInputStream} from which data is read
|
|
* @throws IOException if an I/O error occurs
|
|
* @throws ClassNotFoundException if a serialized class cannot be loaded
|
|
*/
|
|
@java.io.Serial
|
|
private void readObject(ObjectInputStream stream)
|
|
throws IOException, ClassNotFoundException {
|
|
throw new InvalidObjectException(
|
|
"ECPrivateKeyImpl keys are not directly deserializable");
|
|
}
|
|
}
|