/* * Copyright (c) 2005, 2010, 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 com.sun.crypto.provider; import java.security.*;import java.security.spec.AlgorithmParameterSpec; import javax.crypto.*;import javax.crypto.spec.*; import sun.security.internal.interfaces.TlsMasterSecret;import sun.security.internal.spec.*; import static com.sun.crypto.provider.TlsPrfGenerator.*; /** * KeyGenerator implementation for the SSL/TLS master secret derivation. * * @author Andreas Sterbenz * @since 1.6 */public final class TlsKeyMaterialGenerator extends KeyGeneratorSpi { private final static String MSG = "TlsKeyMaterialGenerator must be " + "initialized using a TlsKeyMaterialParameterSpec"; private TlsKeyMaterialParameterSpec spec; private int protocolVersion; public TlsKeyMaterialGenerator() { } protected void engineInit(SecureRandom random) { throw new InvalidParameterException(MSG); } protected void engineInit(AlgorithmParameterSpec params, SecureRandom random) throws InvalidAlgorithmParameterException { if (params instanceof TlsKeyMaterialParameterSpec == false) { throw new InvalidAlgorithmParameterException(MSG); } this.spec = (TlsKeyMaterialParameterSpec)params; if ("RAW".equals(spec.getMasterSecret().getFormat()) == false) { throw new InvalidAlgorithmParameterException( "Key format must be RAW"); } protocolVersion = (spec.getMajorVersion() << 8) | spec.getMinorVersion(); if ((protocolVersion < 0x0300) || (protocolVersion > 0x0303)) { throw new InvalidAlgorithmParameterException( "Only SSL 3.0, TLS 1.0/1.1/1.2 supported"); } } protected void engineInit(int keysize, SecureRandom random) { throw new InvalidParameterException(MSG); } protected SecretKey engineGenerateKey() { if (spec == null) { throw new IllegalStateException( "TlsKeyMaterialGenerator must be initialized"); } try { return engineGenerateKey0(); } catch (GeneralSecurityException e) { throw new ProviderException(e); } } private SecretKey engineGenerateKey0() throws GeneralSecurityException { byte[] masterSecret = spec.getMasterSecret().getEncoded(); byte[] clientRandom = spec.getClientRandom(); byte[] serverRandom = spec.getServerRandom(); SecretKey clientMacKey = null; SecretKey serverMacKey = null; SecretKey clientCipherKey = null; SecretKey serverCipherKey = null; IvParameterSpec clientIv = null; IvParameterSpec serverIv = null; int macLength = spec.getMacKeyLength(); int expandedKeyLength = spec.getExpandedCipherKeyLength(); boolean isExportable = (expandedKeyLength != 0); int keyLength = spec.getCipherKeyLength(); int ivLength = spec.getIvLength(); int keyBlockLen = macLength + keyLength + (isExportable ? 0 : ivLength); keyBlockLen <<= 1; byte[] keyBlock = new byte[keyBlockLen]; // These may be used again later for exportable suite calculations. MessageDigest md5 = null; MessageDigest sha = null; // generate key block if (protocolVersion >= 0x0303) { // TLS 1.2 byte[] seed = concat(serverRandom, clientRandom); keyBlock = doTLS12PRF(masterSecret, LABEL_KEY_EXPANSION, seed, keyBlockLen, spec.getPRFHashAlg(), spec.getPRFHashLength(), spec.getPRFBlockSize()); } else if (protocolVersion >= 0x0301) { // TLS 1.0/1.1 md5 = MessageDigest.getInstance("MD5"); sha = MessageDigest.getInstance("SHA1"); byte[] seed = concat(serverRandom, clientRandom); keyBlock = doTLS10PRF(masterSecret, LABEL_KEY_EXPANSION, seed, keyBlockLen, md5, sha); } else { // SSL md5 = MessageDigest.getInstance("MD5"); sha = MessageDigest.getInstance("SHA1"); keyBlock = new byte[keyBlockLen]; byte[] tmp = new byte[20]; for (int i = 0, remaining = keyBlockLen; remaining > 0; i++, remaining -= 16) { sha.update(SSL3_CONST[i]); sha.update(masterSecret); sha.update(serverRandom); sha.update(clientRandom); sha.digest(tmp, 0, 20); md5.update(masterSecret); md5.update(tmp); if (remaining >= 16) { md5.digest(keyBlock, i << 4, 16); } else { md5.digest(tmp, 0, 16); System.arraycopy(tmp, 0, keyBlock, i << 4, remaining); } } } // partition keyblock into individual secrets int ofs = 0; byte[] tmp = new byte[macLength]; // mac keys System.arraycopy(keyBlock, ofs, tmp, 0, macLength); ofs += macLength; clientMacKey = new SecretKeySpec(tmp, "Mac"); System.arraycopy(keyBlock, ofs, tmp, 0, macLength); ofs += macLength; serverMacKey = new SecretKeySpec(tmp, "Mac"); if (keyLength == 0) { // SSL_RSA_WITH_NULL_* ciphersuites return new TlsKeyMaterialSpec(clientMacKey, serverMacKey); } String alg = spec.getCipherAlgorithm(); // cipher keys byte[] clientKeyBytes = new byte[keyLength]; System.arraycopy(keyBlock, ofs, clientKeyBytes, 0, keyLength); ofs += keyLength; byte[] serverKeyBytes = new byte[keyLength]; System.arraycopy(keyBlock, ofs, serverKeyBytes, 0, keyLength); ofs += keyLength; if (isExportable == false) { // cipher keys clientCipherKey = new SecretKeySpec(clientKeyBytes, alg); serverCipherKey = new SecretKeySpec(serverKeyBytes, alg); // IV keys if needed. if (ivLength != 0) { tmp = new byte[ivLength]; System.arraycopy(keyBlock, ofs, tmp, 0, ivLength); ofs += ivLength; clientIv = new IvParameterSpec(tmp); System.arraycopy(keyBlock, ofs, tmp, 0, ivLength); ofs += ivLength; serverIv = new IvParameterSpec(tmp); } } else { // if exportable suites, calculate the alternate // cipher key expansion and IV generation if (protocolVersion >= 0x0302) { // TLS 1.1+ throw new RuntimeException( "Internal Error: TLS 1.1+ should not be negotiating" + "exportable ciphersuites"); } else if (protocolVersion == 0x0301) { // TLS 1.0 byte[] seed = concat(clientRandom, serverRandom); tmp = doTLS10PRF(clientKeyBytes, LABEL_CLIENT_WRITE_KEY, seed, expandedKeyLength, md5, sha); clientCipherKey = new SecretKeySpec(tmp, alg); tmp = doTLS10PRF(serverKeyBytes, LABEL_SERVER_WRITE_KEY, seed, expandedKeyLength, md5, sha); serverCipherKey = new SecretKeySpec(tmp, alg); if (ivLength != 0) { tmp = new byte[ivLength]; byte[] block = doTLS10PRF(null, LABEL_IV_BLOCK, seed, ivLength << 1, md5, sha); System.arraycopy(block, 0, tmp, 0, ivLength); clientIv = new IvParameterSpec(tmp); System.arraycopy(block, ivLength, tmp, 0, ivLength); serverIv = new IvParameterSpec(tmp); } } else { // SSLv3 tmp = new byte[expandedKeyLength]; md5.update(clientKeyBytes); md5.update(clientRandom); md5.update(serverRandom); System.arraycopy(md5.digest(), 0, tmp, 0, expandedKeyLength); clientCipherKey = new SecretKeySpec(tmp, alg); md5.update(serverKeyBytes); md5.update(serverRandom); md5.update(clientRandom); System.arraycopy(md5.digest(), 0, tmp, 0, expandedKeyLength); serverCipherKey = new SecretKeySpec(tmp, alg); if (ivLength != 0) { tmp = new byte[ivLength]; md5.update(clientRandom); md5.update(serverRandom); System.arraycopy(md5.digest(), 0, tmp, 0, ivLength); clientIv = new IvParameterSpec(tmp); md5.update(serverRandom); md5.update(clientRandom); System.arraycopy(md5.digest(), 0, tmp, 0, ivLength); serverIv = new IvParameterSpec(tmp); } } } return new TlsKeyMaterialSpec(clientMacKey, serverMacKey, clientCipherKey, clientIv, serverCipherKey, serverIv); } }
/*
* Copyright (c) 2005, 2010, 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 com.sun.crypto.provider;
import java.security.*;
import java.security.spec.AlgorithmParameterSpec;
import javax.crypto.*;
import javax.crypto.spec.*;
import sun.security.internal.interfaces.TlsMasterSecret;
import sun.security.internal.spec.*;
import static com.sun.crypto.provider.TlsPrfGenerator.*;
/**
* KeyGenerator implementation for the SSL/TLS master secret derivation.
*
* @author Andreas Sterbenz
* @since 1.6
*/
public final class TlsKeyMaterialGenerator extends KeyGeneratorSpi {
private final static String MSG = "TlsKeyMaterialGenerator must be "
+ "initialized using a TlsKeyMaterialParameterSpec";
private TlsKeyMaterialParameterSpec spec;
private int protocolVersion;
public TlsKeyMaterialGenerator() {
}
protected void engineInit(SecureRandom random) {
throw new InvalidParameterException(MSG);
}
protected void engineInit(AlgorithmParameterSpec params,
SecureRandom random) throws InvalidAlgorithmParameterException {
if (params instanceof TlsKeyMaterialParameterSpec == false) {
throw new InvalidAlgorithmParameterException(MSG);
}
this.spec = (TlsKeyMaterialParameterSpec)params;
if ("RAW".equals(spec.getMasterSecret().getFormat()) == false) {
throw new InvalidAlgorithmParameterException(
"Key format must be RAW");
}
protocolVersion = (spec.getMajorVersion() << 8)
| spec.getMinorVersion();
if ((protocolVersion < 0x0300) || (protocolVersion > 0x0303)) {
throw new InvalidAlgorithmParameterException(
"Only SSL 3.0, TLS 1.0/1.1/1.2 supported");
}
}
protected void engineInit(int keysize, SecureRandom random) {
throw new InvalidParameterException(MSG);
}
protected SecretKey engineGenerateKey() {
if (spec == null) {
throw new IllegalStateException(
"TlsKeyMaterialGenerator must be initialized");
}
try {
return engineGenerateKey0();
} catch (GeneralSecurityException e) {
throw new ProviderException(e);
}
}
private SecretKey engineGenerateKey0() throws GeneralSecurityException {
byte[] masterSecret = spec.getMasterSecret().getEncoded();
byte[] clientRandom = spec.getClientRandom();
byte[] serverRandom = spec.getServerRandom();
SecretKey clientMacKey = null;
SecretKey serverMacKey = null;
SecretKey clientCipherKey = null;
SecretKey serverCipherKey = null;
IvParameterSpec clientIv = null;
IvParameterSpec serverIv = null;
int macLength = spec.getMacKeyLength();
int expandedKeyLength = spec.getExpandedCipherKeyLength();
boolean isExportable = (expandedKeyLength != 0);
int keyLength = spec.getCipherKeyLength();
int ivLength = spec.getIvLength();
int keyBlockLen = macLength + keyLength
+ (isExportable ? 0 : ivLength);
keyBlockLen <<= 1;
byte[] keyBlock = new byte[keyBlockLen];
// These may be used again later for exportable suite calculations.
MessageDigest md5 = null;
MessageDigest sha = null;
// generate key block
if (protocolVersion >= 0x0303) {
// TLS 1.2
byte[] seed = concat(serverRandom, clientRandom);
keyBlock = doTLS12PRF(masterSecret, LABEL_KEY_EXPANSION, seed,
keyBlockLen, spec.getPRFHashAlg(),
spec.getPRFHashLength(), spec.getPRFBlockSize());
} else if (protocolVersion >= 0x0301) {
// TLS 1.0/1.1
md5 = MessageDigest.getInstance("MD5");
sha = MessageDigest.getInstance("SHA1");
byte[] seed = concat(serverRandom, clientRandom);
keyBlock = doTLS10PRF(masterSecret, LABEL_KEY_EXPANSION, seed,
keyBlockLen, md5, sha);
} else {
// SSL
md5 = MessageDigest.getInstance("MD5");
sha = MessageDigest.getInstance("SHA1");
keyBlock = new byte[keyBlockLen];
byte[] tmp = new byte[20];
for (int i = 0, remaining = keyBlockLen;
remaining > 0;
i++, remaining -= 16) {
sha.update(SSL3_CONST[i]);
sha.update(masterSecret);
sha.update(serverRandom);
sha.update(clientRandom);
sha.digest(tmp, 0, 20);
md5.update(masterSecret);
md5.update(tmp);
if (remaining >= 16) {
md5.digest(keyBlock, i << 4, 16);
} else {
md5.digest(tmp, 0, 16);
System.arraycopy(tmp, 0, keyBlock, i << 4, remaining);
}
}
}
// partition keyblock into individual secrets
int ofs = 0;
byte[] tmp = new byte[macLength];
// mac keys
System.arraycopy(keyBlock, ofs, tmp, 0, macLength);
ofs += macLength;
clientMacKey = new SecretKeySpec(tmp, "Mac");
System.arraycopy(keyBlock, ofs, tmp, 0, macLength);
ofs += macLength;
serverMacKey = new SecretKeySpec(tmp, "Mac");
if (keyLength == 0) { // SSL_RSA_WITH_NULL_* ciphersuites
return new TlsKeyMaterialSpec(clientMacKey, serverMacKey);
}
String alg = spec.getCipherAlgorithm();
// cipher keys
byte[] clientKeyBytes = new byte[keyLength];
System.arraycopy(keyBlock, ofs, clientKeyBytes, 0, keyLength);
ofs += keyLength;
byte[] serverKeyBytes = new byte[keyLength];
System.arraycopy(keyBlock, ofs, serverKeyBytes, 0, keyLength);
ofs += keyLength;
if (isExportable == false) {
// cipher keys
clientCipherKey = new SecretKeySpec(clientKeyBytes, alg);
serverCipherKey = new SecretKeySpec(serverKeyBytes, alg);
// IV keys if needed.
if (ivLength != 0) {
tmp = new byte[ivLength];
System.arraycopy(keyBlock, ofs, tmp, 0, ivLength);
ofs += ivLength;
clientIv = new IvParameterSpec(tmp);
System.arraycopy(keyBlock, ofs, tmp, 0, ivLength);
ofs += ivLength;
serverIv = new IvParameterSpec(tmp);
}
} else {
// if exportable suites, calculate the alternate
// cipher key expansion and IV generation
if (protocolVersion >= 0x0302) {
// TLS 1.1+
throw new RuntimeException(
"Internal Error: TLS 1.1+ should not be negotiating" +
"exportable ciphersuites");
} else if (protocolVersion == 0x0301) {
// TLS 1.0
byte[] seed = concat(clientRandom, serverRandom);
tmp = doTLS10PRF(clientKeyBytes, LABEL_CLIENT_WRITE_KEY, seed,
expandedKeyLength, md5, sha);
clientCipherKey = new SecretKeySpec(tmp, alg);
tmp = doTLS10PRF(serverKeyBytes, LABEL_SERVER_WRITE_KEY, seed,
expandedKeyLength, md5, sha);
serverCipherKey = new SecretKeySpec(tmp, alg);
if (ivLength != 0) {
tmp = new byte[ivLength];
byte[] block = doTLS10PRF(null, LABEL_IV_BLOCK, seed,
ivLength << 1, md5, sha);
System.arraycopy(block, 0, tmp, 0, ivLength);
clientIv = new IvParameterSpec(tmp);
System.arraycopy(block, ivLength, tmp, 0, ivLength);
serverIv = new IvParameterSpec(tmp);
}
} else {
// SSLv3
tmp = new byte[expandedKeyLength];
md5.update(clientKeyBytes);
md5.update(clientRandom);
md5.update(serverRandom);
System.arraycopy(md5.digest(), 0, tmp, 0, expandedKeyLength);
clientCipherKey = new SecretKeySpec(tmp, alg);
md5.update(serverKeyBytes);
md5.update(serverRandom);
md5.update(clientRandom);
System.arraycopy(md5.digest(), 0, tmp, 0, expandedKeyLength);
serverCipherKey = new SecretKeySpec(tmp, alg);
if (ivLength != 0) {
tmp = new byte[ivLength];
md5.update(clientRandom);
md5.update(serverRandom);
System.arraycopy(md5.digest(), 0, tmp, 0, ivLength);
clientIv = new IvParameterSpec(tmp);
md5.update(serverRandom);
md5.update(clientRandom);
System.arraycopy(md5.digest(), 0, tmp, 0, ivLength);
serverIv = new IvParameterSpec(tmp);
}
}
}
return new TlsKeyMaterialSpec(clientMacKey, serverMacKey,
clientCipherKey, clientIv, serverCipherKey, serverIv);
}
}