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87c6761704
Co-authored-by: Adam Petcher <adam.petcher@oracle.com> Co-authored-by: Amanda Jiang <amanda.jiang@oracle.com> Co-authored-by: Anthony Scarpino <anthony.scarpino@oracle.com> Co-authored-by: Bradford Wetmore <bradford.wetmore@oracle.com> Co-authored-by: Jamil Nimeh <jamil.j.nimeh@oracle.com> Co-authored-by: John Jiang <sha.jiang@oracle.com> Co-authored-by: Rajan Halade <rajan.halade@oracle.com> Co-authored-by: Sibabrata Sahoo <sibabrata.sahoo@oracle.com> Co-authored-by: Valerie Peng <valerie.peng@oracle.com> Co-authored-by: Weijun Wang <weijun.wang@oracle.com> Reviewed-by: ascarpino, coffeys, dfuchs, jjiang, jnimeh, mullan, rhalade, ssahoo, valeriep, weijun, wetmore, xuelei
81 lines
3 KiB
Java
81 lines
3 KiB
Java
/*
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* Copyright (c) 2018, Oracle and/or its affiliates. All rights reserved.
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* DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
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*
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* This code is free software; you can redistribute it and/or modify it
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* under the terms of the GNU General Public License version 2 only, as
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* published by the Free Software Foundation. Oracle designates this
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* particular file as subject to the "Classpath" exception as provided
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* by Oracle in the LICENSE file that accompanied this code.
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*
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* This code is distributed in the hope that it will be useful, but WITHOUT
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* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
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* FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
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* version 2 for more details (a copy is included in the LICENSE file that
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* accompanied this code).
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*
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* You should have received a copy of the GNU General Public License version
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* 2 along with this work; if not, write to the Free Software Foundation,
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* Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
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*
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* Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
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* or visit www.oracle.com if you need additional information or have any
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* questions.
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*/
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package sun.security.ssl;
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import java.io.IOException;
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import java.nio.ByteBuffer;
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import java.security.GeneralSecurityException;
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import java.security.spec.AlgorithmParameterSpec;
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import javax.crypto.SecretKey;
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import javax.net.ssl.SSLHandshakeException;
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final class SSLBasicKeyDerivation implements SSLKeyDerivation {
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private final String hashAlg;
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private final SecretKey secret;
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private final byte[] hkdfInfo;
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SSLBasicKeyDerivation(SecretKey secret, String hashAlg,
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byte[] label, byte[] context, int length) {
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this.hashAlg = hashAlg.replace("-", "");
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this.secret = secret;
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this.hkdfInfo = createHkdfInfo(label, context, length);
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}
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@Override
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public SecretKey deriveKey(String algorithm,
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AlgorithmParameterSpec keySpec) throws IOException {
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try {
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HKDF hkdf = new HKDF(hashAlg);
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return hkdf.expand(secret, hkdfInfo,
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((SecretSizeSpec)keySpec).length, algorithm);
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} catch (GeneralSecurityException gse) {
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throw (SSLHandshakeException) new SSLHandshakeException(
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"Could not generate secret").initCause(gse);
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}
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}
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private static byte[] createHkdfInfo(
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byte[] label, byte[] context, int length) {
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byte[] info = new byte[4 + label.length + context.length];
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ByteBuffer m = ByteBuffer.wrap(info);
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try {
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Record.putInt16(m, length);
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Record.putBytes8(m, label);
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Record.putBytes8(m, context);
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} catch (IOException ioe) {
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// unlikely
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}
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return info;
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}
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static class SecretSizeSpec implements AlgorithmParameterSpec {
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final int length;
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SecretSizeSpec(int length) {
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this.length = length;
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}
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}
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}
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