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/*
* 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 org.conscrypt;
import java.io.IOException;
import java.io.NotSerializableException;
import java.io.ObjectInputStream;
import java.io.ObjectOutputStream;
import java.security.InvalidKeyException;
import java.util.Arrays;
import javax.crypto.SecretKey;
public class OpenSSLSecretKey implements SecretKey, OpenSSLKeyHolder {
private static final long serialVersionUID = 1831053062911514589L;
private final String algorithm;
private final int type;
private final byte[] encoded;
private transient OpenSSLKey key;
public OpenSSLSecretKey(String algorithm, byte[] encoded) {
this.algorithm = algorithm;
this.encoded = encoded;
type = NativeCrypto.EVP_PKEY_HMAC;
key = new OpenSSLKey(NativeCrypto.EVP_PKEY_new_mac_key(type, encoded));
}
public OpenSSLSecretKey(String algorithm, OpenSSLKey key) {
this.algorithm = algorithm;
this.key = key;
type = NativeCrypto.EVP_PKEY_type(key.getPkeyContext());
encoded = null;
}
public static OpenSSLKey getInstance(SecretKey key) throws InvalidKeyException {
try {
return new OpenSSLKey(NativeCrypto.EVP_PKEY_new_mac_key(NativeCrypto.EVP_PKEY_HMAC,
key.getEncoded()));
} catch (Exception e) {
throw new InvalidKeyException(e);
}
}
@Override
public String getAlgorithm() {
return algorithm;
}
@Override
public String getFormat() {
if (key.isEngineBased()) {
return null;
}
return "RAW";
}
@Override
public byte[] getEncoded() {
if (key.isEngineBased()) {
return null;
}
return encoded;
}
@Override
public OpenSSLKey getOpenSSLKey() {
return key;
}
@Override
public boolean equals(Object o) {
if (o == this) {
return true;
}
if (!(o instanceof SecretKey)) {
return false;
}
SecretKey other = (SecretKey) o;
if (!algorithm.equals(other.getAlgorithm())) {
return false;
}
if (o instanceof OpenSSLSecretKey) {
OpenSSLSecretKey otherOpenSSL = (OpenSSLSecretKey) o;
return key.equals(otherOpenSSL.getOpenSSLKey());
} else if (key.isEngineBased()) {
return false;
}
if (!getFormat().equals(other.getFormat())) {
return false;
}
return Arrays.equals(encoded, other.getEncoded());
}
@Override
public int hashCode() {
return key.hashCode();
}
private void readObject(ObjectInputStream stream) throws IOException, ClassNotFoundException {
stream.defaultReadObject();
key = new OpenSSLKey(NativeCrypto.EVP_PKEY_new_mac_key(type, encoded));
}
private void writeObject(ObjectOutputStream stream) throws IOException {
if (getOpenSSLKey().isEngineBased()) {
throw new NotSerializableException("engine-based keys can not be serialized");
}
stream.defaultWriteObject();
}
}
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