author | xuelei |
Sat, 09 Jun 2018 08:08:12 -0700 | |
branch | JDK-8145252-TLS13-branch |
changeset 56714 | 2d7e08d730b6 |
parent 56646 | e57205a6e4ee |
permissions | -rw-r--r-- |
56542 | 1 |
/* |
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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.ProviderException; |
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import java.security.spec.AlgorithmParameterSpec; |
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import javax.crypto.KeyGenerator; |
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import javax.crypto.SecretKey; |
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import javax.crypto.spec.IvParameterSpec; |
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import javax.crypto.spec.SecretKeySpec; |
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import javax.net.ssl.SSLHandshakeException; |
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import sun.security.internal.spec.TlsKeyMaterialParameterSpec; |
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import sun.security.internal.spec.TlsKeyMaterialSpec; |
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import sun.security.ssl.CipherSuite.HashAlg; |
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import static sun.security.ssl.CipherSuite.HashAlg.H_NONE; |
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enum SSLTrafficKeyDerivation implements SSLKeyDerivationGenerator { |
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SSL30 ("kdf_ssl30", new S30TrafficKeyDerivationGenerator()), |
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TLS10 ("kdf_tls10", new T10TrafficKeyDerivationGenerator()), |
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TLS12 ("kdf_tls12", new T12TrafficKeyDerivationGenerator()), |
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TLS13 ("kdf_tls13", new T13TrafficKeyDerivationGenerator()); |
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final String name; |
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final SSLKeyDerivationGenerator keyDerivationGenerator; |
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SSLTrafficKeyDerivation(String name, |
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SSLKeyDerivationGenerator keyDerivationGenerator) { |
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this.name = name; |
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this.keyDerivationGenerator = keyDerivationGenerator; |
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} |
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static SSLTrafficKeyDerivation valueOf(ProtocolVersion protocolVersion) { |
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switch (protocolVersion) { |
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case SSL30: |
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return SSLTrafficKeyDerivation.SSL30; |
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case TLS10: |
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case TLS11: |
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case DTLS10: |
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return SSLTrafficKeyDerivation.TLS10; |
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case TLS12: |
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case DTLS12: |
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return SSLTrafficKeyDerivation.TLS12; |
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case TLS13: |
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return SSLTrafficKeyDerivation.TLS13; |
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} |
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return null; |
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} |
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@Override |
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public SSLKeyDerivation createKeyDerivation(HandshakeContext context, |
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SecretKey secretKey) throws IOException { |
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return keyDerivationGenerator.createKeyDerivation(context, secretKey); |
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} |
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private static final class S30TrafficKeyDerivationGenerator |
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implements SSLKeyDerivationGenerator { |
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private S30TrafficKeyDerivationGenerator() { |
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// blank |
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} |
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@Override |
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public SSLKeyDerivation createKeyDerivation( |
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HandshakeContext context, SecretKey secretKey) throws IOException { |
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return new LegacyTrafficKeyDerivation(context, secretKey); |
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} |
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} |
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private static final class T10TrafficKeyDerivationGenerator |
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implements SSLKeyDerivationGenerator { |
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private T10TrafficKeyDerivationGenerator() { |
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// blank |
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} |
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@Override |
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public SSLKeyDerivation createKeyDerivation( |
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HandshakeContext context, SecretKey secretKey) throws IOException { |
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return new LegacyTrafficKeyDerivation(context, secretKey); |
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} |
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} |
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private static final class T12TrafficKeyDerivationGenerator |
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implements SSLKeyDerivationGenerator { |
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private T12TrafficKeyDerivationGenerator() { |
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// blank |
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} |
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@Override |
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public SSLKeyDerivation createKeyDerivation( |
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HandshakeContext context, SecretKey secretKey) throws IOException { |
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return new LegacyTrafficKeyDerivation(context, secretKey); |
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} |
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} |
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private static final class T13TrafficKeyDerivationGenerator |
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implements SSLKeyDerivationGenerator { |
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private T13TrafficKeyDerivationGenerator() { |
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// blank |
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} |
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@Override |
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public SSLKeyDerivation createKeyDerivation( |
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HandshakeContext context, |
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SecretKey secretKey) throws IOException { |
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return new T13TrafficKeyDerivation(context, secretKey); |
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} |
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} |
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static final class T13TrafficKeyDerivation implements SSLKeyDerivation { |
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private final CipherSuite cs; |
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private final SecretKey secret; |
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T13TrafficKeyDerivation( |
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HandshakeContext context, SecretKey secret) { |
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this.secret = secret; |
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this.cs = context.negotiatedCipherSuite; |
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} |
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@Override |
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public SecretKey deriveKey(String algorithm, |
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AlgorithmParameterSpec params) throws IOException { |
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KeySchedule ks = KeySchedule.valueOf(algorithm); |
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try { |
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HKDF hkdf = new HKDF(cs.hashAlg.name); |
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byte[] hkdfInfo = |
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createHkdfInfo(ks.label, ks.getKeyLength(cs)); |
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return hkdf.expand(secret, hkdfInfo, |
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ks.getKeyLength(cs), |
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ks.getAlgorithm(cs, 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, int length) throws IOException { |
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byte[] info = new byte[4 + label.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.putInt8(m, 0x00); // zero-length context |
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} catch (IOException ioe) { |
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// unlikely |
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56646
e57205a6e4ee
integer overflow, remove ununsed code and comments
xuelei
parents:
56542
diff
changeset
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throw new RuntimeException("Unexpected exception", ioe); |
56542 | 173 |
} |
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return info; |
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} |
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} |
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private enum KeySchedule { |
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// Note that we use enum name as the key/ name. |
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TlsKey ("key", false), |
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TlsIv ("iv", true), |
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TlsUpdateNplus1 ("traffic upd", false); |
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private final byte[] label; |
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private final boolean isIv; |
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private KeySchedule(String label, boolean isIv) { |
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this.label = ("tls13 " + label).getBytes(); |
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this.isIv = isIv; |
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} |
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int getKeyLength(CipherSuite cs) { |
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if (this == KeySchedule.TlsUpdateNplus1) |
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return cs.hashAlg.hashLength; |
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return isIv ? cs.bulkCipher.ivSize : cs.bulkCipher.keySize; |
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} |
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String getAlgorithm(CipherSuite cs, String algorithm) { |
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return isIv ? algorithm : cs.bulkCipher.algorithm; |
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} |
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} |
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@SuppressWarnings("deprecation") |
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static final class LegacyTrafficKeyDerivation implements SSLKeyDerivation { |
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private final HandshakeContext context; |
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private final SecretKey masterSecret; |
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private final TlsKeyMaterialSpec keyMaterialSpec; |
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LegacyTrafficKeyDerivation( |
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HandshakeContext context, SecretKey masterSecret) { |
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this.context = context; |
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this.masterSecret = masterSecret; |
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CipherSuite cipherSuite = context.negotiatedCipherSuite; |
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ProtocolVersion protocolVersion = context.negotiatedProtocol; |
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/* |
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* For both the read and write sides of the protocol, we use the |
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* master to generate MAC secrets and cipher keying material. Block |
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* ciphers need initialization vectors, which we also generate. |
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* |
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* First we figure out how much keying material is needed. |
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*/ |
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int hashSize = cipherSuite.macAlg.size; |
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boolean is_exportable = cipherSuite.exportable; |
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SSLCipher cipher = cipherSuite.bulkCipher; |
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int expandedKeySize = is_exportable ? cipher.expandedKeySize : 0; |
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// Which algs/params do we need to use? |
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String keyMaterialAlg; |
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HashAlg hashAlg; |
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byte majorVersion = protocolVersion.major; |
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byte minorVersion = protocolVersion.minor; |
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if (protocolVersion.isDTLS) { |
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// Use TLS version number for DTLS key calculation |
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if (protocolVersion.id == ProtocolVersion.DTLS10.id) { |
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majorVersion = ProtocolVersion.TLS11.major; |
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minorVersion = ProtocolVersion.TLS11.minor; |
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keyMaterialAlg = "SunTlsKeyMaterial"; |
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hashAlg = H_NONE; |
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} else { // DTLS 1.2+ |
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majorVersion = ProtocolVersion.TLS12.major; |
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minorVersion = ProtocolVersion.TLS12.minor; |
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keyMaterialAlg = "SunTls12KeyMaterial"; |
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hashAlg = cipherSuite.hashAlg; |
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} |
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} else { |
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if (protocolVersion.id >= ProtocolVersion.TLS12.id) { |
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keyMaterialAlg = "SunTls12KeyMaterial"; |
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hashAlg = cipherSuite.hashAlg; |
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} else { |
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keyMaterialAlg = "SunTlsKeyMaterial"; |
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hashAlg = H_NONE; |
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} |
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} |
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// TLS v1.1+ and DTLS use an explicit IV in CBC cipher suites to |
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// protect against the CBC attacks. AEAD/GCM cipher suites in |
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// TLS v1.2 or later use a fixed IV as the implicit part of the |
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// partially implicit nonce technique described in RFC 5116. |
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int ivSize = cipher.ivSize; |
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if (cipher.cipherType == CipherType.AEAD_CIPHER) { |
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ivSize = cipher.fixedIvSize; |
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} else if ( |
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cipher.cipherType == CipherType.BLOCK_CIPHER && |
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protocolVersion.useTLS11PlusSpec()) { |
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ivSize = 0; |
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} |
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TlsKeyMaterialParameterSpec spec = new TlsKeyMaterialParameterSpec( |
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masterSecret, (majorVersion & 0xFF), (minorVersion & 0xFF), |
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context.clientHelloRandom.randomBytes, |
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context.serverHelloRandom.randomBytes, |
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cipher.algorithm, cipher.keySize, expandedKeySize, |
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ivSize, hashSize, |
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hashAlg.name, hashAlg.hashLength, hashAlg.blockSize); |
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try { |
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KeyGenerator kg = JsseJce.getKeyGenerator(keyMaterialAlg); |
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kg.init(spec); |
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this.keyMaterialSpec = (TlsKeyMaterialSpec)kg.generateKey(); |
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} catch (GeneralSecurityException e) { |
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throw new ProviderException(e); |
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} |
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} |
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SecretKey getTrafficKey(String algorithm) { |
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switch (algorithm) { |
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case "clientMacKey": |
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return keyMaterialSpec.getClientMacKey(); |
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case "serverMacKey": |
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return keyMaterialSpec.getServerMacKey(); |
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case "clientWriteKey": |
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return keyMaterialSpec.getClientCipherKey(); |
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case "serverWriteKey": |
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return keyMaterialSpec.getServerCipherKey(); |
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case "clientWriteIv": |
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IvParameterSpec cliIvSpec = keyMaterialSpec.getClientIv(); |
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return (cliIvSpec == null) ? null : |
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new SecretKeySpec(cliIvSpec.getIV(), "TlsIv"); |
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case "serverWriteIv": |
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IvParameterSpec srvIvSpec = keyMaterialSpec.getServerIv(); |
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return (srvIvSpec == null) ? null : |
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new SecretKeySpec(srvIvSpec.getIV(), "TlsIv"); |
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} |
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return null; |
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} |
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@Override |
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public SecretKey deriveKey(String algorithm, |
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AlgorithmParameterSpec params) throws IOException { |
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return getTrafficKey(algorithm); |
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} |
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} |
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} |
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