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DOMKeyValue.java
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/**
* 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
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*
* 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
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/*
* Copyright (c) 2005, 2019, Oracle and/or its affiliates. All rights reserved.
*/
/*
* $Id: DOMKeyValue.java 1854026 2019-02-21 09:30:01Z coheigea $
*/
package org.jcp.xml.dsig.internal.dom;
import java.io.IOException;
import java.math.BigInteger;
import java.security.KeyException;
import java.security.KeyFactory;
import java.security.NoSuchAlgorithmException;
import java.security.PublicKey;
import java.security.interfaces.DSAParams;
import java.security.interfaces.DSAPublicKey;
import java.security.interfaces.ECPublicKey;
import java.security.interfaces.RSAPublicKey;
import java.security.spec.DSAPublicKeySpec;
import java.security.spec.ECField;
import java.security.spec.ECFieldFp;
import java.security.spec.ECParameterSpec;
import java.security.spec.ECPoint;
import java.security.spec.ECPublicKeySpec;
import java.security.spec.EllipticCurve;
import java.security.spec.InvalidKeySpecException;
import java.security.spec.KeySpec;
import java.security.spec.RSAPublicKeySpec;
import java.util.Arrays;
import javax.xml.crypto.MarshalException;
import javax.xml.crypto.dom.DOMCryptoContext;
import javax.xml.crypto.dsig.XMLSignature;
import javax.xml.crypto.dsig.keyinfo.KeyValue;
import com.sun.org.apache.xml.internal.security.utils.XMLUtils;
import org.w3c.dom.Document;
import org.w3c.dom.Element;
import org.w3c.dom.Node;
/**
* DOM-based implementation of KeyValue.
*
*/
public abstract class DOMKeyValue<K extends PublicKey> extends DOMStructure implements KeyValue {
private static final String XMLDSIG_11_XMLNS
= "http://www.w3.org/2009/xmldsig11#";
private final K publicKey;
public DOMKeyValue(K key) throws KeyException {
if (key == null) {
throw new NullPointerException("key cannot be null");
}
this.publicKey = key;
}
/**
* Creates a {@code DOMKeyValue} from an element.
*
* @param kvtElem a KeyValue child element
*/
public DOMKeyValue(Element kvtElem) throws MarshalException {
this.publicKey = unmarshalKeyValue(kvtElem);
}
static KeyValue unmarshal(Element kvElem) throws MarshalException {
Element kvtElem = DOMUtils.getFirstChildElement(kvElem);
if (kvtElem == null) {
throw new MarshalException("KeyValue must contain at least one type");
}
String namespace = kvtElem.getNamespaceURI();
if (kvtElem.getLocalName().equals("DSAKeyValue") && XMLSignature.XMLNS.equals(namespace)) {
return new DSA(kvtElem);
} else if (kvtElem.getLocalName().equals("RSAKeyValue") && XMLSignature.XMLNS.equals(namespace)) {
return new RSA(kvtElem);
} else if (kvtElem.getLocalName().equals("ECKeyValue") && XMLDSIG_11_XMLNS.equals(namespace)) {
return new EC(kvtElem);
} else {
return new Unknown(kvtElem);
}
}
public PublicKey getPublicKey() throws KeyException {
if (publicKey == null) {
throw new KeyException("can't convert KeyValue to PublicKey");
} else {
return publicKey;
}
}
@Override
public void marshal(Node parent, String dsPrefix, DOMCryptoContext context)
throws MarshalException
{
Document ownerDoc = DOMUtils.getOwnerDocument(parent);
// create KeyValue element
Element kvElem = DOMUtils.createElement(ownerDoc, "KeyValue",
XMLSignature.XMLNS, dsPrefix);
marshalPublicKey(kvElem, ownerDoc, dsPrefix, context);
parent.appendChild(kvElem);
}
abstract void marshalPublicKey(Node parent, Document doc, String dsPrefix,
DOMCryptoContext context) throws MarshalException;
abstract K unmarshalKeyValue(Element kvtElem)
throws MarshalException;
private static PublicKey generatePublicKey(KeyFactory kf, KeySpec keyspec) {
try {
return kf.generatePublic(keyspec);
} catch (InvalidKeySpecException e) {
//@@@ should dump exception to LOG
return null;
}
}
@Override
public boolean equals(Object obj) {
if (this == obj) {
return true;
}
if (!(obj instanceof KeyValue)) {
return false;
}
try {
KeyValue kv = (KeyValue)obj;
if (publicKey == null ) {
if (kv.getPublicKey() != null) {
return false;
}
} else if (!publicKey.equals(kv.getPublicKey())) {
return false;
}
} catch (KeyException ke) {
// no practical way to determine if the keys are equal
return false;
}
return true;
}
public static BigInteger decode(Element elem) throws MarshalException {
try {
String base64str = elem.getFirstChild().getNodeValue();
return new BigInteger(1, XMLUtils.decode(base64str));
} catch (Exception ex) {
throw new MarshalException(ex);
}
}
@Override
public int hashCode() {
int result = 17;
if (publicKey != null) {
result = 31 * result + publicKey.hashCode();
}
return result;
}
static final class RSA extends DOMKeyValue<RSAPublicKey> {
// RSAKeyValue CryptoBinaries
private DOMCryptoBinary modulus, exponent;
private KeyFactory rsakf;
RSA(RSAPublicKey key) throws KeyException {
super(key);
RSAPublicKey rkey = key;
exponent = new DOMCryptoBinary(rkey.getPublicExponent());
modulus = new DOMCryptoBinary(rkey.getModulus());
}
RSA(Element elem) throws MarshalException {
super(elem);
}
void marshalPublicKey(Node parent, Document doc, String dsPrefix,
DOMCryptoContext context) throws MarshalException {
Element rsaElem = DOMUtils.createElement(doc, "RSAKeyValue",
XMLSignature.XMLNS,
dsPrefix);
Element modulusElem = DOMUtils.createElement(doc, "Modulus",
XMLSignature.XMLNS,
dsPrefix);
Element exponentElem = DOMUtils.createElement(doc, "Exponent",
XMLSignature.XMLNS,
dsPrefix);
modulus.marshal(modulusElem, dsPrefix, context);
exponent.marshal(exponentElem, dsPrefix, context);
rsaElem.appendChild(modulusElem);
rsaElem.appendChild(exponentElem);
parent.appendChild(rsaElem);
}
@Override
RSAPublicKey unmarshalKeyValue(Element kvtElem)
throws MarshalException
{
if (rsakf == null) {
try {
rsakf = KeyFactory.getInstance("RSA");
} catch (NoSuchAlgorithmException e) {
throw new RuntimeException
("unable to create RSA KeyFactory: " + e.getMessage());
}
}
Element modulusElem = DOMUtils.getFirstChildElement(kvtElem,
"Modulus",
XMLSignature.XMLNS);
BigInteger modulus = decode(modulusElem);
Element exponentElem = DOMUtils.getNextSiblingElement(modulusElem,
"Exponent",
XMLSignature.XMLNS);
BigInteger exponent = decode(exponentElem);
RSAPublicKeySpec spec = new RSAPublicKeySpec(modulus, exponent);
return (RSAPublicKey) generatePublicKey(rsakf, spec);
}
}
static final class DSA extends DOMKeyValue<DSAPublicKey> {
// DSAKeyValue CryptoBinaries
private DOMCryptoBinary p, q, g, y; //, seed, pgen;
private KeyFactory dsakf;
DSA(DSAPublicKey key) throws KeyException {
super(key);
DSAPublicKey dkey = key;
DSAParams params = dkey.getParams();
p = new DOMCryptoBinary(params.getP());
q = new DOMCryptoBinary(params.getQ());
g = new DOMCryptoBinary(params.getG());
y = new DOMCryptoBinary(dkey.getY());
}
DSA(Element elem) throws MarshalException {
super(elem);
}
@Override
void marshalPublicKey(Node parent, Document doc, String dsPrefix,
DOMCryptoContext context)
throws MarshalException
{
Element dsaElem = DOMUtils.createElement(doc, "DSAKeyValue",
XMLSignature.XMLNS,
dsPrefix);
// parameters J, Seed & PgenCounter are not included
Element pElem = DOMUtils.createElement(doc, "P", XMLSignature.XMLNS,
dsPrefix);
Element qElem = DOMUtils.createElement(doc, "Q", XMLSignature.XMLNS,
dsPrefix);
Element gElem = DOMUtils.createElement(doc, "G", XMLSignature.XMLNS,
dsPrefix);
Element yElem = DOMUtils.createElement(doc, "Y", XMLSignature.XMLNS,
dsPrefix);
p.marshal(pElem, dsPrefix, context);
q.marshal(qElem, dsPrefix, context);
g.marshal(gElem, dsPrefix, context);
y.marshal(yElem, dsPrefix, context);
dsaElem.appendChild(pElem);
dsaElem.appendChild(qElem);
dsaElem.appendChild(gElem);
dsaElem.appendChild(yElem);
parent.appendChild(dsaElem);
}
@Override
DSAPublicKey unmarshalKeyValue(Element kvtElem)
throws MarshalException
{
if (dsakf == null) {
try {
dsakf = KeyFactory.getInstance("DSA");
} catch (NoSuchAlgorithmException e) {
throw new RuntimeException
("unable to create DSA KeyFactory: " + e.getMessage());
}
}
Element curElem = DOMUtils.getFirstChildElement(kvtElem);
if (curElem == null) {
throw new MarshalException("KeyValue must contain at least one type");
}
// check for P and Q
BigInteger p = null;
BigInteger q = null;
if (curElem.getLocalName().equals("P") && XMLSignature.XMLNS.equals(curElem.getNamespaceURI())) {
p = decode(curElem);
curElem = DOMUtils.getNextSiblingElement(curElem, "Q", XMLSignature.XMLNS);
q = decode(curElem);
curElem = DOMUtils.getNextSiblingElement(curElem);
}
BigInteger g = null;
if (curElem != null
&& curElem.getLocalName().equals("G") && XMLSignature.XMLNS.equals(curElem.getNamespaceURI())) {
g = decode(curElem);
curElem = DOMUtils.getNextSiblingElement(curElem, "Y", XMLSignature.XMLNS);
}
BigInteger y = null;
if (curElem != null) {
y = decode(curElem);
curElem = DOMUtils.getNextSiblingElement(curElem);
}
//if (curElem != null && curElem.getLocalName().equals("J")) {
//j = new DOMCryptoBinary(curElem.getFirstChild());
// curElem = DOMUtils.getNextSiblingElement(curElem);
//}
//@@@ do we care about j, pgenCounter or seed?
DSAPublicKeySpec spec = new DSAPublicKeySpec(y, p, q, g);
return (DSAPublicKey) generatePublicKey(dsakf, spec);
}
}
static final class EC extends DOMKeyValue<ECPublicKey> {
// ECKeyValue CryptoBinaries
private byte[] ecPublicKey;
private KeyFactory eckf;
private ECParameterSpec ecParams;
/* Supported curve, secp256r1 */
private static final Curve SECP256R1 = initializeCurve(
"secp256r1 [NIST P-256, X9.62 prime256v1]",
"1.2.840.10045.3.1.7",
"FFFFFFFF00000001000000000000000000000000FFFFFFFFFFFFFFFFFFFFFFFF",
"FFFFFFFF00000001000000000000000000000000FFFFFFFFFFFFFFFFFFFFFFFC",
"5AC635D8AA3A93E7B3EBBD55769886BC651D06B0CC53B0F63BCE3C3E27D2604B",
"6B17D1F2E12C4247F8BCE6E563A440F277037D812DEB33A0F4A13945D898C296",
"4FE342E2FE1A7F9B8EE7EB4A7C0F9E162BCE33576B315ECECBB6406837BF51F5",
"FFFFFFFF00000000FFFFFFFFFFFFFFFFBCE6FAADA7179E84F3B9CAC2FC632551",
1
);
/* Supported curve secp384r1 */
private static final Curve SECP384R1 = initializeCurve(
"secp384r1 [NIST P-384]",
"1.3.132.0.34",
"FFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFEFFFFFFFF0000000000000000FFFFFFFF",
"FFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFEFFFFFFFF0000000000000000FFFFFFFC",
"B3312FA7E23EE7E4988E056BE3F82D19181D9C6EFE8141120314088F5013875AC656398D8A2ED19D2A85C8EDD3EC2AEF",
"AA87CA22BE8B05378EB1C71EF320AD746E1D3B628BA79B9859F741E082542A385502F25DBF55296C3A545E3872760AB7",
"3617DE4A96262C6F5D9E98BF9292DC29F8F41DBD289A147CE9DA3113B5F0B8C00A60B1CE1D7E819D7A431D7C90EA0E5F",
"FFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFC7634D81F4372DDF581A0DB248B0A77AECEC196ACCC52973",
1
);
/* Supported curve secp521r1 */
private static final Curve SECP521R1 = initializeCurve(
"secp521r1 [NIST P-521]",
"1.3.132.0.35",
"01FFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFF",
"01FFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFC",
"0051953EB9618E1C9A1F929A21A0B68540EEA2DA725B99B315F3B8B489918EF109E156193951EC7E937B1652C0BD3BB1BF073573DF883D2C34F1EF451FD46B503F00",
"00C6858E06B70404E9CD9E3ECB662395B4429C648139053FB521F828AF606B4D3DBAA14B5E77EFE75928FE1DC127A2FFA8DE3348B3C1856A429BF97E7E31C2E5BD66",
"011839296A789A3BC0045C8A5FB42C7D1BD998F54449579B446817AFBD17273E662C97EE72995EF42640C550B9013FAD0761353C7086A272C24088BE94769FD16650",
"01FFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFA51868783BF2F966B7FCC0148F709A5D03BB5C9B8899C47AEBB6FB71E91386409",
1
);
private static Curve initializeCurve(String name, String oid,
String sfield, String a, String b,
String x, String y, String n, int h) {
BigInteger p = bigInt(sfield);
ECField field = new ECFieldFp(p);
EllipticCurve curve = new EllipticCurve(field, bigInt(a),
bigInt(b));
ECPoint g = new ECPoint(bigInt(x), bigInt(y));
return new Curve(name, oid, curve, g, bigInt(n), h);
}
EC(ECPublicKey ecKey) throws KeyException {
super(ecKey);
ECPoint ecPoint = ecKey.getW();
ecParams = ecKey.getParams();
ecPublicKey = encodePoint(ecPoint, ecParams.getCurve());
}
EC(Element dmElem) throws MarshalException {
super(dmElem);
}
private static ECPoint decodePoint(byte[] data, EllipticCurve curve)
throws IOException {
if (data.length == 0 || data[0] != 4) {
throw new IOException("Only uncompressed point format " +
"supported");
}
// Per ANSI X9.62, an encoded point is a 1 byte type followed by
// ceiling(LOG base 2 field-size / 8) bytes of x and the same of y.
int n = (data.length - 1) / 2;
if (n != (curve.getField().getFieldSize() + 7) >> 3) {
throw new IOException("Point does not match field size");
}
byte[] xb = Arrays.copyOfRange(data, 1, 1 + n);
byte[] yb = Arrays.copyOfRange(data, n + 1, n + 1 + n);
return new ECPoint(new BigInteger(1, xb), new BigInteger(1, yb));
}
private static byte[] encodePoint(ECPoint point, EllipticCurve curve) {
// get field size in bytes (rounding up)
int n = (curve.getField().getFieldSize() + 7) >> 3;
byte[] xb = trimZeroes(point.getAffineX().toByteArray());
byte[] yb = trimZeroes(point.getAffineY().toByteArray());
if (xb.length > n || yb.length > n) {
throw new RuntimeException("Point coordinates do not " +
"match field size");
}
byte[] b = new byte[1 + (n << 1)];
b[0] = 4; // uncompressed
System.arraycopy(xb, 0, b, n - xb.length + 1, xb.length);
System.arraycopy(yb, 0, b, b.length - yb.length, yb.length);
return b;
}
private static byte[] trimZeroes(byte[] b) {
int i = 0;
while (i < b.length - 1 && b[i] == 0) {
i++;
}
if (i == 0) {
return b;
}
return Arrays.copyOfRange(b, i, b.length);
}
private static String getCurveOid(ECParameterSpec params) {
// Check that the params represent one of the supported
// curves. If there is a match, return the object identifier
// of the curve.
Curve match;
if (matchCurve(params, SECP256R1)) {
match = SECP256R1;
} else if (matchCurve(params, SECP384R1)) {
match = SECP384R1;
} else if (matchCurve(params, SECP521R1)) {
match = SECP521R1;
} else {
return null;
}
return match.getObjectId();
}
private static boolean matchCurve(ECParameterSpec params, Curve curve) {
int fieldSize = params.getCurve().getField().getFieldSize();
if (curve.getCurve().getField().getFieldSize() == fieldSize
&& curve.getCurve().equals(params.getCurve())
&& curve.getGenerator().equals(params.getGenerator())
&& curve.getOrder().equals(params.getOrder())
&& curve.getCofactor() == params.getCofactor()) {
return true;
} else {
return false;
}
}
@Override
void marshalPublicKey(Node parent, Document doc, String dsPrefix,
DOMCryptoContext context)
throws MarshalException
{
String prefix = DOMUtils.getNSPrefix(context, XMLDSIG_11_XMLNS);
Element ecKeyValueElem = DOMUtils.createElement(doc, "ECKeyValue",
XMLDSIG_11_XMLNS,
prefix);
Element namedCurveElem = DOMUtils.createElement(doc, "NamedCurve",
XMLDSIG_11_XMLNS,
prefix);
Element publicKeyElem = DOMUtils.createElement(doc, "PublicKey",
XMLDSIG_11_XMLNS,
prefix);
String oid = getCurveOid(ecParams);
if (oid == null) {
throw new MarshalException("Invalid ECParameterSpec");
}
DOMUtils.setAttribute(namedCurveElem, "URI", "urn:oid:" + oid);
String qname = prefix == null || prefix.length() == 0
? "xmlns" : "xmlns:" + prefix;
namedCurveElem.setAttributeNS("http://www.w3.org/2000/xmlns/",
qname, XMLDSIG_11_XMLNS);
ecKeyValueElem.appendChild(namedCurveElem);
String encoded = XMLUtils.encodeToString(ecPublicKey);
publicKeyElem.appendChild
(DOMUtils.getOwnerDocument(publicKeyElem).createTextNode(encoded));
ecKeyValueElem.appendChild(publicKeyElem);
parent.appendChild(ecKeyValueElem);
}
@Override
ECPublicKey unmarshalKeyValue(Element kvtElem)
throws MarshalException
{
if (eckf == null) {
try {
eckf = KeyFactory.getInstance("EC");
} catch (NoSuchAlgorithmException e) {
throw new RuntimeException
("unable to create EC KeyFactory: " + e.getMessage());
}
}
ECParameterSpec ecParams = null;
Element curElem = DOMUtils.getFirstChildElement(kvtElem);
if (curElem == null) {
throw new MarshalException("KeyValue must contain at least one type");
}
if (curElem.getLocalName().equals("ECParameters")
&& XMLDSIG_11_XMLNS.equals(curElem.getNamespaceURI())) {
throw new UnsupportedOperationException
("ECParameters not supported");
} else if (curElem.getLocalName().equals("NamedCurve")
&& XMLDSIG_11_XMLNS.equals(curElem.getNamespaceURI())) {
String uri = DOMUtils.getAttributeValue(curElem, "URI");
// strip off "urn:oid"
if (uri.startsWith("urn:oid:")) {
String oid = uri.substring("urn:oid:".length());
ecParams = getECParameterSpec(oid);
if (ecParams == null) {
throw new MarshalException("Invalid curve OID");
}
} else {
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