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/*
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* Copyright (c) 2005, 2010, 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.internal.spec;
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import java.security.spec.AlgorithmParameterSpec;
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import javax.crypto.SecretKey;
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/**
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* Parameters for SSL/TLS key material generation.
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* This class is used to initialize KeyGenerator of the type
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* "TlsKeyMaterial". The keys returned by such KeyGenerators will be
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* instances of {@link TlsKeyMaterialSpec}.
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*
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* <p>Instances of this class are immutable.
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*
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* @since 1.6
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* @author Andreas Sterbenz
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* @deprecated Sun JDK internal use only --- WILL BE REMOVED in a future
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* release.
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*/
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@Deprecated
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public class TlsKeyMaterialParameterSpec implements AlgorithmParameterSpec {
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private final SecretKey masterSecret;
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private final int majorVersion, minorVersion;
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private final byte[] clientRandom, serverRandom;
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private final String cipherAlgorithm;
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private final int cipherKeyLength, ivLength, macKeyLength;
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private final int expandedCipherKeyLength; // == 0 for domestic ciphersuites
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private final String prfHashAlg;
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private final int prfHashLength;
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private final int prfBlockSize;
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/**
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* Constructs a new TlsKeyMaterialParameterSpec.
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*
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* @param masterSecret the master secret
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* @param majorVersion the major number of the protocol version
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* @param minorVersion the minor number of the protocol version
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* @param clientRandom the client's random value
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* @param serverRandom the server's random value
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* @param cipherAlgorithm the algorithm name of the cipher keys to
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* be generated
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* @param cipherKeyLength if 0, no cipher keys will be generated;
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* otherwise, the length in bytes of cipher keys to be
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* generated for domestic cipher suites; for cipher suites defined as
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* exportable, the number of key material bytes to be generated;
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* @param expandedCipherKeyLength 0 for domestic cipher suites; for
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* exportable cipher suites the length in bytes of the key to be
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* generated.
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* @param ivLength the length in bytes of the initialization vector
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* to be generated, or 0 if no initialization vector is required
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* @param macKeyLength the length in bytes of the MAC key to be generated
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* @param prfHashAlg the name of the TLS PRF hash algorithm to use.
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* Used only for TLS 1.2+. TLS1.1 and earlier use a fixed PRF.
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* @param prfHashLength the output length of the TLS PRF hash algorithm.
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* Used only for TLS 1.2+.
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* @param prfBlockSize the input block size of the TLS PRF hash algorithm.
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* Used only for TLS 1.2+.
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*
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* @throws NullPointerException if masterSecret, clientRandom,
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* serverRandom, or cipherAlgorithm are null
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* @throws IllegalArgumentException if the algorithm of masterSecret is
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* not TlsMasterSecret, or if majorVersion or minorVersion are
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* negative or larger than 255; or if cipherKeyLength, expandedKeyLength,
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* ivLength, or macKeyLength are negative
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*/
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public TlsKeyMaterialParameterSpec(SecretKey masterSecret,
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int majorVersion, int minorVersion, byte[] clientRandom,
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byte[] serverRandom, String cipherAlgorithm, int cipherKeyLength,
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int expandedCipherKeyLength, int ivLength, int macKeyLength,
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String prfHashAlg, int prfHashLength, int prfBlockSize) {
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if (masterSecret.getAlgorithm().equals("TlsMasterSecret") == false) {
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throw new IllegalArgumentException("Not a TLS master secret");
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}
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if (cipherAlgorithm == null) {
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throw new NullPointerException();
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}
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this.masterSecret = masterSecret;
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this.majorVersion =
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TlsMasterSecretParameterSpec.checkVersion(majorVersion);
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this.minorVersion =
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TlsMasterSecretParameterSpec.checkVersion(minorVersion);
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this.clientRandom = clientRandom.clone();
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this.serverRandom = serverRandom.clone();
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this.cipherAlgorithm = cipherAlgorithm;
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this.cipherKeyLength = checkSign(cipherKeyLength);
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this.expandedCipherKeyLength = checkSign(expandedCipherKeyLength);
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this.ivLength = checkSign(ivLength);
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this.macKeyLength = checkSign(macKeyLength);
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this.prfHashAlg = prfHashAlg;
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this.prfHashLength = prfHashLength;
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this.prfBlockSize = prfBlockSize;
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}
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private static int checkSign(int k) {
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if (k < 0) {
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throw new IllegalArgumentException("Value must not be negative");
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}
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return k;
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}
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/**
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* Returns the master secret.
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*
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* @return the master secret.
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*/
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public SecretKey getMasterSecret() {
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return masterSecret;
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}
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/**
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* Returns the major version number.
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*
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* @return the major version number.
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*/
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public int getMajorVersion() {
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return majorVersion;
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}
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/**
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* Returns the minor version number.
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*
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* @return the minor version number.
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*/
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public int getMinorVersion() {
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return minorVersion;
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}
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/**
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* Returns a copy of the client's random value.
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*
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* @return a copy of the client's random value.
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*/
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public byte[] getClientRandom() {
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return clientRandom.clone();
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}
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/**
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* Returns a copy of the server's random value.
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*
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* @return a copy of the server's random value.
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*/
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public byte[] getServerRandom() {
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return serverRandom.clone();
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}
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/**
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* Returns the cipher algorithm.
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*
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* @return the cipher algorithm.
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*/
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public String getCipherAlgorithm() {
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return cipherAlgorithm;
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}
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/**
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* Returns the length in bytes of the encryption key to be generated.
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*
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* @return the length in bytes of the encryption key to be generated.
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*/
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public int getCipherKeyLength() {
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return cipherKeyLength;
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}
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/**
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* Returns the length in bytes of the expanded encryption key to be
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* generated. Returns zero if the expanded encryption key is not
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* supposed to be generated.
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*
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* @return the length in bytes of the expanded encryption key to be
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* generated.
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*/
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public int getExpandedCipherKeyLength() {
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// TLS v1.1 disables the exportable weak cipher suites.
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if (majorVersion >= 0x03 && minorVersion >= 0x02) {
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return 0;
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}
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return expandedCipherKeyLength;
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}
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/**
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* Returns the length in bytes of the initialization vector to be
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* generated. Returns zero if the initialization vector is not
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* supposed to be generated.
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*
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* @return the length in bytes of the initialization vector to be
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* generated.
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*/
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public int getIvLength() {
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// TLS v1.1 or later uses an explicit IV to protect against
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// the CBC attacks.
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if (majorVersion >= 0x03 && minorVersion >= 0x02) {
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return 0;
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}
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return ivLength;
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}
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/**
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* Returns the length in bytes of the MAC key to be generated.
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*
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* @return the length in bytes of the MAC key to be generated.
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*/
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public int getMacKeyLength() {
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return macKeyLength;
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}
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/**
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* Obtains the PRF hash algorithm to use in the PRF calculation.
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*
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* @return the hash algorithm.
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*/
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public String getPRFHashAlg() {
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return prfHashAlg;
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}
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/**
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* Obtains the length of the PRF hash algorithm.
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*
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* @return the hash algorithm length.
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*/
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public int getPRFHashLength() {
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return prfHashLength;
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}
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/**
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* Obtains the block size of the PRF hash algorithm.
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*
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* @return the hash algorithm block size
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*/
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public int getPRFBlockSize() {
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return prfBlockSize;
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}
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}
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