--- /dev/null Thu Jan 01 00:00:00 1970 +0000
+++ b/src/jdk.crypto.ec/share/classes/sun/security/ec/XDHKeyFactory.java Tue May 08 09:47:28 2018 -0400
@@ -0,0 +1,243 @@
+/*
+ * Copyright (c) 2018, 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.security.KeyFactorySpi;
+import java.security.Key;
+import java.security.PublicKey;
+import java.security.PrivateKey;
+import java.security.InvalidKeyException;
+import java.security.ProviderException;
+import java.security.interfaces.XECKey;
+import java.security.interfaces.XECPrivateKey;
+import java.security.interfaces.XECPublicKey;
+import java.security.spec.AlgorithmParameterSpec;
+import java.security.spec.NamedParameterSpec;
+import java.security.spec.KeySpec;
+import java.security.spec.InvalidKeySpecException;
+import java.security.spec.PKCS8EncodedKeySpec;
+import java.security.spec.X509EncodedKeySpec;
+import java.security.spec.XECPublicKeySpec;
+import java.security.spec.XECPrivateKeySpec;
+import java.util.function.Function;
+
+public class XDHKeyFactory extends KeyFactorySpi {
+
+ private XECParameters lockedParams = null;
+
+ XDHKeyFactory() {
+ // do nothing
+ }
+
+ protected XDHKeyFactory(AlgorithmParameterSpec paramSpec) {
+ lockedParams = XECParameters.get(ProviderException::new, paramSpec);
+ }
+
+ @Override
+ protected Key engineTranslateKey(Key key) throws InvalidKeyException {
+
+ if (key == null) {
+ throw new InvalidKeyException("Key must not be null");
+ }
+
+ if (key instanceof XECKey) {
+ XECKey xecKey = (XECKey) key;
+ XECParameters params = XECParameters.get(InvalidKeyException::new,
+ xecKey.getParams());
+ checkLockedParams(InvalidKeyException::new, params);
+
+ if (xecKey instanceof XECPublicKey) {
+ XECPublicKey publicKey = (XECPublicKey) xecKey;
+ return new XDHPublicKeyImpl(params, publicKey.getU());
+ } else if (xecKey instanceof XECPrivateKey) {
+ XECPrivateKey privateKey = (XECPrivateKey) xecKey;
+ byte[] scalar = privateKey.getScalar().orElseThrow(
+ () -> new InvalidKeyException("No private key data"));
+ return new XDHPrivateKeyImpl(params, scalar);
+ } else {
+ throw new InvalidKeyException("Unsupported XECKey subclass");
+ }
+ } else if (key instanceof PublicKey &&
+ key.getFormat().equals("X.509")) {
+ XDHPublicKeyImpl result = new XDHPublicKeyImpl(key.getEncoded());
+ checkLockedParams(InvalidKeyException::new, result.getParams());
+ return result;
+ } else if (key instanceof PrivateKey &&
+ key.getFormat().equals("PKCS#8")) {
+ XDHPrivateKeyImpl result = new XDHPrivateKeyImpl(key.getEncoded());
+ checkLockedParams(InvalidKeyException::new, result.getParams());
+ return result;
+ } else {
+ throw new InvalidKeyException("Unsupported key type or format");
+ }
+ }
+
+ private
+ <T extends Throwable>
+ void checkLockedParams(Function<String, T> exception,
+ AlgorithmParameterSpec spec) throws T {
+
+ XECParameters params = XECParameters.get(exception, spec);
+ checkLockedParams(exception, params);
+ }
+
+ private
+ <T extends Throwable>
+ void checkLockedParams(Function<String, T> exception,
+ XECParameters params) throws T {
+
+ if (lockedParams != null && lockedParams != params) {
+ throw exception.apply("Parameters must be " +
+ lockedParams.getName());
+ }
+ }
+
+ @Override
+ protected PublicKey engineGeneratePublic(KeySpec keySpec)
+ throws InvalidKeySpecException {
+
+ try {
+ return generatePublicImpl(keySpec);
+ } catch (InvalidKeyException ex) {
+ throw new InvalidKeySpecException(ex);
+ }
+ }
+
+ @Override
+ protected PrivateKey engineGeneratePrivate(KeySpec keySpec)
+ throws InvalidKeySpecException {
+
+ try {
+ return generatePrivateImpl(keySpec);
+ } catch (InvalidKeyException ex) {
+ throw new InvalidKeySpecException(ex);
+ }
+ }
+
+
+ private PublicKey generatePublicImpl(KeySpec keySpec)
+ throws InvalidKeyException, InvalidKeySpecException {
+
+ if (keySpec instanceof X509EncodedKeySpec) {
+ X509EncodedKeySpec x509Spec = (X509EncodedKeySpec) keySpec;
+ XDHPublicKeyImpl result =
+ new XDHPublicKeyImpl(x509Spec.getEncoded());
+ checkLockedParams(InvalidKeySpecException::new,
+ result.getParams());
+ return result;
+ } else if (keySpec instanceof XECPublicKeySpec) {
+ XECPublicKeySpec publicKeySpec = (XECPublicKeySpec) keySpec;
+ XECParameters params = XECParameters.get(
+ InvalidKeySpecException::new, publicKeySpec.getParams());
+ checkLockedParams(InvalidKeySpecException::new, params);
+ return new XDHPublicKeyImpl(params, publicKeySpec.getU());
+ } else {
+ throw new InvalidKeySpecException(
+ "Only X509EncodedKeySpec and XECPublicKeySpec are supported");
+ }
+ }
+
+ private PrivateKey generatePrivateImpl(KeySpec keySpec)
+ throws InvalidKeyException, InvalidKeySpecException {
+
+ if (keySpec instanceof PKCS8EncodedKeySpec) {
+ PKCS8EncodedKeySpec pkcsSpec = (PKCS8EncodedKeySpec) keySpec;
+ XDHPrivateKeyImpl result =
+ new XDHPrivateKeyImpl(pkcsSpec.getEncoded());
+ checkLockedParams(InvalidKeySpecException::new,
+ result.getParams());
+ return result;
+ } else if (keySpec instanceof XECPrivateKeySpec) {
+ XECPrivateKeySpec privateKeySpec = (XECPrivateKeySpec) keySpec;
+ XECParameters params = XECParameters.get(
+ InvalidKeySpecException::new, privateKeySpec.getParams());
+ checkLockedParams(InvalidKeySpecException::new, params);
+ return new XDHPrivateKeyImpl(params, privateKeySpec.getScalar());
+ } else {
+ throw new InvalidKeySpecException(
+ "Only PKCS8EncodedKeySpec and XECPrivateKeySpec supported");
+ }
+ }
+
+ protected <T extends KeySpec> T engineGetKeySpec(Key key, Class<T> keySpec)
+ throws InvalidKeySpecException {
+
+ if (key instanceof XECPublicKey) {
+ checkLockedParams(InvalidKeySpecException::new,
+ ((XECPublicKey) key).getParams());
+
+ if (X509EncodedKeySpec.class.isAssignableFrom(keySpec)) {
+ if (!key.getFormat().equals("X.509")) {
+ throw new InvalidKeySpecException("Format is not X.509");
+ }
+ return keySpec.cast(new X509EncodedKeySpec(key.getEncoded()));
+ } else if (XECPublicKeySpec.class.isAssignableFrom(keySpec)) {
+ XECPublicKey xecKey = (XECPublicKey) key;
+ return keySpec.cast(
+ new XECPublicKeySpec(xecKey.getParams(), xecKey.getU()));
+ } else {
+ throw new InvalidKeySpecException(
+ "KeySpec must be X509EncodedKeySpec or XECPublicKeySpec");
+ }
+ } else if (key instanceof XECPrivateKey) {
+ checkLockedParams(InvalidKeySpecException::new,
+ ((XECPrivateKey) key).getParams());
+
+ if (PKCS8EncodedKeySpec.class.isAssignableFrom(keySpec)) {
+ if (!key.getFormat().equals("PKCS#8")) {
+ throw new InvalidKeySpecException("Format is not PKCS#8");
+ }
+ return keySpec.cast(new PKCS8EncodedKeySpec(key.getEncoded()));
+ } else if (XECPrivateKeySpec.class.isAssignableFrom(keySpec)) {
+ XECPrivateKey xecKey = (XECPrivateKey) key;
+ byte[] scalar = xecKey.getScalar().orElseThrow(
+ () -> new InvalidKeySpecException("No private key value")
+ );
+ return keySpec.cast(
+ new XECPrivateKeySpec(xecKey.getParams(), scalar));
+ } else {
+ throw new InvalidKeySpecException
+ ("KeySpec must be PKCS8EncodedKeySpec or XECPrivateKeySpec");
+ }
+ } else {
+ throw new InvalidKeySpecException("Unsupported key type");
+ }
+ }
+
+ static class X25519 extends XDHKeyFactory {
+
+ public X25519() {
+ super(NamedParameterSpec.X25519);
+ }
+ }
+
+ static class X448 extends XDHKeyFactory {
+
+ public X448() {
+ super(NamedParameterSpec.X448);
+ }
+ }
+}