| /* |
| * Copyright (c) 2005, 2007, 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.pkcs11; |
| |
| import java.security.*; |
| import java.security.spec.AlgorithmParameterSpec; |
| |
| import javax.crypto.*; |
| import javax.crypto.spec.*; |
| |
| import sun.security.internal.spec.TlsPrfParameterSpec; |
| |
| import static sun.security.pkcs11.TemplateManager.*; |
| import sun.security.pkcs11.wrapper.*; |
| import static sun.security.pkcs11.wrapper.PKCS11Constants.*; |
| |
| /** |
| * KeyGenerator for the TLS PRF. Note that although the PRF is used in a number |
| * of places during the handshake, this class is usually only used to calculate |
| * the Finished messages. The reason is that for those other uses more specific |
| * PKCS#11 mechanisms have been defined (CKM_SSL3_MASTER_KEY_DERIVE, etc.). |
| * |
| * <p>This class supports the CKM_TLS_PRF mechanism from PKCS#11 v2.20 and |
| * the older NSS private mechanism. |
| * |
| * @author Andreas Sterbenz |
| * @since 1.6 |
| */ |
| final class P11TlsPrfGenerator extends KeyGeneratorSpi { |
| |
| private final static String MSG = |
| "TlsPrfGenerator must be initialized using a TlsPrfParameterSpec"; |
| |
| // token instance |
| private final Token token; |
| |
| // algorithm name |
| private final String algorithm; |
| |
| // mechanism id |
| private final long mechanism; |
| |
| private TlsPrfParameterSpec spec; |
| |
| private P11Key p11Key; |
| |
| P11TlsPrfGenerator(Token token, String algorithm, long mechanism) |
| throws PKCS11Exception { |
| super(); |
| this.token = token; |
| this.algorithm = algorithm; |
| this.mechanism = mechanism; |
| } |
| |
| protected void engineInit(SecureRandom random) { |
| throw new InvalidParameterException(MSG); |
| } |
| |
| protected void engineInit(AlgorithmParameterSpec params, |
| SecureRandom random) throws InvalidAlgorithmParameterException { |
| if (params instanceof TlsPrfParameterSpec == false) { |
| throw new InvalidAlgorithmParameterException(MSG); |
| } |
| this.spec = (TlsPrfParameterSpec)params; |
| SecretKey key = spec.getSecret(); |
| if (key == null) { |
| key = NULL_KEY; |
| } |
| try { |
| p11Key = P11SecretKeyFactory.convertKey(token, key, null); |
| } catch (InvalidKeyException e) { |
| throw new InvalidAlgorithmParameterException("init() failed", e); |
| } |
| } |
| |
| // SecretKeySpec does not allow zero length keys, so we define our own class. |
| private static final SecretKey NULL_KEY = new SecretKey() { |
| public byte[] getEncoded() { |
| return new byte[0]; |
| } |
| public String getFormat() { |
| return "RAW"; |
| } |
| public String getAlgorithm() { |
| return "Generic"; |
| } |
| }; |
| |
| protected void engineInit(int keysize, SecureRandom random) { |
| throw new InvalidParameterException(MSG); |
| } |
| |
| protected SecretKey engineGenerateKey() { |
| if (spec == null) { |
| throw new IllegalStateException("TlsPrfGenerator must be initialized"); |
| } |
| byte[] label = P11Util.getBytesUTF8(spec.getLabel()); |
| byte[] seed = spec.getSeed(); |
| |
| if (mechanism == CKM_NSS_TLS_PRF_GENERAL) { |
| Session session = null; |
| try { |
| session = token.getOpSession(); |
| token.p11.C_SignInit |
| (session.id(), new CK_MECHANISM(mechanism), p11Key.keyID); |
| token.p11.C_SignUpdate(session.id(), 0, label, 0, label.length); |
| token.p11.C_SignUpdate(session.id(), 0, seed, 0, seed.length); |
| byte[] out = token.p11.C_SignFinal |
| (session.id(), spec.getOutputLength()); |
| return new SecretKeySpec(out, "TlsPrf"); |
| } catch (PKCS11Exception e) { |
| throw new ProviderException("Could not calculate PRF", e); |
| } finally { |
| token.releaseSession(session); |
| } |
| } |
| |
| // mechanism == CKM_TLS_PRF |
| |
| byte[] out = new byte[spec.getOutputLength()]; |
| CK_TLS_PRF_PARAMS params = new CK_TLS_PRF_PARAMS(seed, label, out); |
| |
| Session session = null; |
| try { |
| session = token.getOpSession(); |
| long keyID = token.p11.C_DeriveKey(session.id(), |
| new CK_MECHANISM(mechanism, params), p11Key.keyID, null); |
| // ignore keyID, returned PRF bytes are in 'out' |
| return new SecretKeySpec(out, "TlsPrf"); |
| } catch (PKCS11Exception e) { |
| throw new ProviderException("Could not calculate PRF", e); |
| } finally { |
| token.releaseSession(session); |
| } |
| } |
| |
| } |