mirror of
https://github.com/openjdk/jdk.git
synced 2026-01-28 12:09:14 +00:00
4c0a0ab6bc
Co-authored-by: Kevin Driver <kdriver@openjdk.org> Reviewed-by: djelinski, wetmore, mullan, kdriver, weijun
77 lines
2.8 KiB
Java
77 lines
2.8 KiB
Java
/*
|
|
* Copyright (c) 2018, 2025, 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.ssl;
|
|
|
|
import java.io.IOException;
|
|
import java.nio.ByteBuffer;
|
|
import java.security.GeneralSecurityException;
|
|
import javax.crypto.KDF;
|
|
import javax.crypto.SecretKey;
|
|
import javax.crypto.spec.HKDFParameterSpec;
|
|
import javax.net.ssl.SSLHandshakeException;
|
|
|
|
import sun.security.ssl.CipherSuite.HashAlg;
|
|
|
|
final class SSLBasicKeyDerivation implements SSLKeyDerivation {
|
|
private final String hkdfAlg;
|
|
private final SecretKey secret;
|
|
private final byte[] hkdfInfo;
|
|
private final int keyLen;
|
|
|
|
SSLBasicKeyDerivation(SecretKey secret, HashAlg hashAlg, byte[] label,
|
|
byte[] context) {
|
|
this.hkdfAlg = hashAlg.hkdfAlgorithm;
|
|
this.secret = secret;
|
|
this.hkdfInfo = createHkdfInfo(label, context, hashAlg.hashLength);
|
|
this.keyLen = hashAlg.hashLength;
|
|
}
|
|
|
|
@Override
|
|
public SecretKey deriveKey(String type) throws IOException {
|
|
try {
|
|
KDF hkdf = KDF.getInstance(hkdfAlg);
|
|
return hkdf.deriveKey(type,
|
|
HKDFParameterSpec.expandOnly(secret, hkdfInfo, keyLen));
|
|
} catch (GeneralSecurityException gse) {
|
|
throw new SSLHandshakeException("Could not generate secret", gse);
|
|
}
|
|
}
|
|
|
|
private static byte[] createHkdfInfo(
|
|
byte[] label, byte[] context, int length) {
|
|
byte[] info = new byte[4 + label.length + context.length];
|
|
ByteBuffer m = ByteBuffer.wrap(info);
|
|
try {
|
|
Record.putInt16(m, length);
|
|
Record.putBytes8(m, label);
|
|
Record.putBytes8(m, context);
|
|
} catch (IOException ioe) {
|
|
// unlikely
|
|
}
|
|
return info;
|
|
}
|
|
}
|