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/* GENERATED SOURCE. DO NOT MODIFY. */
/*
* Copyright (C) 2013 The Android Open Source Project
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* 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 under the License.
*/
package com.android.org.conscrypt;
import java.lang.reflect.Constructor;
import java.lang.reflect.InvocationTargetException;
import java.math.BigInteger;
import java.security.InvalidKeyException;
import java.security.Key;
import java.security.KeyFactorySpi;
import java.security.PrivateKey;
import java.security.PublicKey;
import java.security.spec.AlgorithmParameterSpec;
import java.security.spec.InvalidKeySpecException;
import java.security.spec.KeySpec;
import java.security.spec.PKCS8EncodedKeySpec;
import java.security.spec.X509EncodedKeySpec;
/**
* An implementation of a {@link KeyFactorySpi} for EC keys based on BoringSSL.
* @hide This class is not part of the Android public SDK API
*/
@Internal
public final class OpenSSLXDHKeyFactory extends KeyFactorySpi {
public OpenSSLXDHKeyFactory() {}
@Override
protected PublicKey engineGeneratePublic(KeySpec keySpec) throws InvalidKeySpecException {
if (keySpec == null) {
throw new InvalidKeySpecException("keySpec == null");
}
if (keySpec instanceof X509EncodedKeySpec) {
return new OpenSSLX25519PublicKey((X509EncodedKeySpec) keySpec);
}
throw new InvalidKeySpecException("Must use ECPublicKeySpec or X509EncodedKeySpec; was "
+ keySpec.getClass().getName());
}
@Override
protected PrivateKey engineGeneratePrivate(KeySpec keySpec) throws InvalidKeySpecException {
if (keySpec == null) {
throw new InvalidKeySpecException("keySpec == null");
}
if (keySpec instanceof PKCS8EncodedKeySpec) {
return new OpenSSLX25519PrivateKey((PKCS8EncodedKeySpec) keySpec);
}
throw new InvalidKeySpecException("Must use ECPrivateKeySpec or PKCS8EncodedKeySpec; was "
+ keySpec.getClass().getName());
}
@Override
protected <T extends KeySpec> T engineGetKeySpec(Key key, Class<T> keySpec)
throws InvalidKeySpecException {
if (key == null) {
throw new InvalidKeySpecException("key == null");
}
if (keySpec == null) {
throw new InvalidKeySpecException("keySpec == null");
}
if (!"XDH".equals(key.getAlgorithm())) {
throw new InvalidKeySpecException("Key must be an XDH key");
}
Class<?> publicKeySpec = getJavaPublicKeySpec();
Class<?> privateKeySpec = getJavaPrivateKeySpec();
if (publicKeySpec != null && key instanceof PublicKey && publicKeySpec.isAssignableFrom(keySpec)) {
final byte[] encoded = key.getEncoded();
if (!"X.509".equals(key.getFormat()) || encoded == null) {
throw new InvalidKeySpecException("Not a valid X.509 encoding");
}
OpenSSLX25519PublicKey publicKey = (OpenSSLX25519PublicKey) engineGeneratePublic(new X509EncodedKeySpec(encoded));
@SuppressWarnings("unchecked")
T result = (T) constructJavaPublicKeySpec(publicKeySpec, publicKey);
return result;
} else if (privateKeySpec != null && key instanceof PrivateKey && privateKeySpec.isAssignableFrom(keySpec)) {
final byte[] encoded = key.getEncoded();
if (!"PKCS#8".equals(key.getFormat()) || encoded == null) {
throw new InvalidKeySpecException("Not a valid PKCS#8 encoding");
}
OpenSSLX25519PrivateKey privateKey = (OpenSSLX25519PrivateKey) engineGeneratePrivate(new PKCS8EncodedKeySpec(encoded));
@SuppressWarnings("unchecked")
T result = (T) constructJavaPrivateKeySpec(privateKeySpec, privateKey);
return result;
} else if (key instanceof PrivateKey && PKCS8EncodedKeySpec.class.isAssignableFrom(keySpec)) {
final byte[] encoded = key.getEncoded();
if (!"PKCS#8".equals(key.getFormat())) {
throw new InvalidKeySpecException("Encoding type must be PKCS#8; was "
+ key.getFormat());
} else if (encoded == null) {
throw new InvalidKeySpecException("Key is not encodable");
}
@SuppressWarnings("unchecked") T result = (T) new PKCS8EncodedKeySpec(encoded);
return result;
} else if (key instanceof PublicKey && X509EncodedKeySpec.class.isAssignableFrom(keySpec)) {
final byte[] encoded = key.getEncoded();
if (!"X.509".equals(key.getFormat())) {
throw new InvalidKeySpecException("Encoding type must be X.509; was "
+ key.getFormat());
} else if (encoded == null) {
throw new InvalidKeySpecException("Key is not encodable");
}
@SuppressWarnings("unchecked") T result = (T) new X509EncodedKeySpec(encoded);
return result;
}
throw new InvalidKeySpecException("Unsupported key type and key spec combination; key="
+ key.getClass().getName() + ", keySpec=" + keySpec.getName());
}
@Override
protected Key engineTranslateKey(Key key) throws InvalidKeyException {
if (key == null) {
throw new InvalidKeyException("key == null");
}
if ((key instanceof OpenSSLX25519PublicKey) || (key instanceof OpenSSLX25519PrivateKey)) {
return key;
} else if ((key instanceof PrivateKey) && "PKCS#8".equals(key.getFormat())) {
byte[] encoded = key.getEncoded();
if (encoded == null) {
throw new InvalidKeyException("Key does not support encoding");
}
try {
return engineGeneratePrivate(new PKCS8EncodedKeySpec(encoded));
} catch (InvalidKeySpecException e) {
throw new InvalidKeyException(e);
}
} else if ((key instanceof PublicKey) && "X.509".equals(key.getFormat())) {
byte[] encoded = key.getEncoded();
if (encoded == null) {
throw new InvalidKeyException("Key does not support encoding");
}
try {
return engineGeneratePublic(new X509EncodedKeySpec(encoded));
} catch (InvalidKeySpecException e) {
throw new InvalidKeyException(e);
}
} else {
throw new InvalidKeyException("Key must be EC public or private key; was "
+ key.getClass().getName());
}
}
private static Class<?> getJavaPrivateKeySpec() {
try {
return Class.forName("java.security.spec.XECPrivateKeySpec");
} catch (ClassNotFoundException ignored) {
return null;
}
}
private static Class<?> getJavaPublicKeySpec() {
try {
return Class.forName("java.security.spec.XECPublicKeySpec");
} catch (ClassNotFoundException ignored) {
return null;
}
}
private KeySpec constructJavaPrivateKeySpec(Class<?> privateKeySpec, OpenSSLX25519PrivateKey privateKey) throws InvalidKeySpecException {
if (privateKeySpec == null) {
throw new InvalidKeySpecException("Could not find java.security.spec.XECPrivateKeySpec");
}
try {
Constructor<?> c = privateKeySpec.getConstructor(AlgorithmParameterSpec.class, byte[].class);
@SuppressWarnings("unchecked")
KeySpec result = (KeySpec) c.newInstance(new OpenSSLXECParameterSpec(OpenSSLXECParameterSpec.X25519), privateKey.getU());
return result;
} catch (NoSuchMethodException e) {
throw new InvalidKeySpecException("Could not find java.security.spec.XECPrivateKeySpec", e);
} catch (InstantiationException e) {
throw new InvalidKeySpecException("Could not find java.security.spec.XECPrivateKeySpec", e);
} catch (IllegalAccessException e) {
throw new InvalidKeySpecException("Could not find java.security.spec.XECPrivateKeySpec", e);
} catch (InvocationTargetException e) {
throw new InvalidKeySpecException("Could not find java.security.spec.XECPrivateKeySpec", e);
}
}
private KeySpec constructJavaPublicKeySpec(Class<?> publicKeySpec, OpenSSLX25519PublicKey publicKey) throws InvalidKeySpecException {
try {
Constructor<?> c = publicKeySpec.getConstructor(AlgorithmParameterSpec.class, BigInteger.class);
@SuppressWarnings("unchecked")
KeySpec result = (KeySpec) c.newInstance(new OpenSSLXECParameterSpec(OpenSSLXECParameterSpec.X25519), new BigInteger(1, publicKey.getU()));
return result;
} catch (NoSuchMethodException e) {
throw new InvalidKeySpecException("Could not find java.security.spec.XECPublicKeySpec", e);
} catch (InstantiationException e) {
throw new InvalidKeySpecException("Could not find java.security.spec.XECPublicKeySpec", e);
} catch (IllegalAccessException e) {
throw new InvalidKeySpecException("Could not find java.security.spec.XECPublicKeySpec", e);
} catch (InvocationTargetException e) {
throw new InvalidKeySpecException("Could not find java.security.spec.XECPublicKeySpec", e);
}
}
}
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