| /* |
| * Copyright (c) 2003, 2009, 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.util.Arrays; |
| import java.nio.ByteBuffer; |
| |
| import javax.crypto.MacSpi; |
| import javax.crypto.SecretKey; |
| import javax.crypto.spec.SecretKeySpec; |
| import javax.crypto.spec.PBEParameterSpec; |
| import java.security.*; |
| import java.security.spec.*; |
| |
| /** |
| * This is an implementation of the HMAC-PBESHA1 algorithm as defined |
| * in PKCS#12 v1.0 standard. |
| * |
| * @author Valerie Peng |
| */ |
| public final class HmacPKCS12PBESHA1 extends MacSpi implements Cloneable { |
| |
| private HmacCore hmac = null; |
| private static final int SHA1_BLOCK_LENGTH = 64; |
| |
| /** |
| * Standard constructor, creates a new HmacSHA1 instance. |
| */ |
| public HmacPKCS12PBESHA1() throws NoSuchAlgorithmException { |
| this.hmac = new HmacCore(MessageDigest.getInstance("SHA1"), |
| SHA1_BLOCK_LENGTH); |
| } |
| |
| /** |
| * Returns the length of the HMAC in bytes. |
| * |
| * @return the HMAC length in bytes. |
| */ |
| protected int engineGetMacLength() { |
| return hmac.getDigestLength(); |
| } |
| |
| /** |
| * Initializes the HMAC with the given secret key and algorithm parameters. |
| * |
| * @param key the secret key. |
| * @param params the algorithm parameters. |
| * |
| * @exception InvalidKeyException if the given key is inappropriate for |
| * initializing this MAC. |
| u* @exception InvalidAlgorithmParameterException if the given algorithm |
| * parameters are inappropriate for this MAC. |
| */ |
| protected void engineInit(Key key, AlgorithmParameterSpec params) |
| throws InvalidKeyException, InvalidAlgorithmParameterException { |
| char[] passwdChars; |
| byte[] salt = null; |
| int iCount = 0; |
| if (key instanceof javax.crypto.interfaces.PBEKey) { |
| javax.crypto.interfaces.PBEKey pbeKey = |
| (javax.crypto.interfaces.PBEKey) key; |
| passwdChars = pbeKey.getPassword(); |
| salt = pbeKey.getSalt(); // maybe null if unspecified |
| iCount = pbeKey.getIterationCount(); // maybe 0 if unspecified |
| } else if (key instanceof SecretKey) { |
| byte[] passwdBytes = key.getEncoded(); |
| if ((passwdBytes == null) || |
| !(key.getAlgorithm().regionMatches(true, 0, "PBE", 0, 3))) { |
| throw new InvalidKeyException("Missing password"); |
| } |
| passwdChars = new char[passwdBytes.length]; |
| for (int i=0; i<passwdChars.length; i++) { |
| passwdChars[i] = (char) (passwdBytes[i] & 0x7f); |
| } |
| } else { |
| throw new InvalidKeyException("SecretKey of PBE type required"); |
| } |
| if (params == null) { |
| // generate default for salt and iteration count if necessary |
| if (salt == null) { |
| salt = new byte[20]; |
| SunJCE.RANDOM.nextBytes(salt); |
| } |
| if (iCount == 0) iCount = 100; |
| } else if (!(params instanceof PBEParameterSpec)) { |
| throw new InvalidAlgorithmParameterException |
| ("PBEParameterSpec type required"); |
| } else { |
| PBEParameterSpec pbeParams = (PBEParameterSpec) params; |
| // make sure the parameter values are consistent |
| if (salt != null) { |
| if (!Arrays.equals(salt, pbeParams.getSalt())) { |
| throw new InvalidAlgorithmParameterException |
| ("Inconsistent value of salt between key and params"); |
| } |
| } else { |
| salt = pbeParams.getSalt(); |
| } |
| if (iCount != 0) { |
| if (iCount != pbeParams.getIterationCount()) { |
| throw new InvalidAlgorithmParameterException |
| ("Different iteration count between key and params"); |
| } |
| } else { |
| iCount = pbeParams.getIterationCount(); |
| } |
| } |
| // For security purpose, we need to enforce a minimum length |
| // for salt; just require the minimum salt length to be 8-byte |
| // which is what PKCS#5 recommends and openssl does. |
| if (salt.length < 8) { |
| throw new InvalidAlgorithmParameterException |
| ("Salt must be at least 8 bytes long"); |
| } |
| if (iCount <= 0) { |
| throw new InvalidAlgorithmParameterException |
| ("IterationCount must be a positive number"); |
| } |
| byte[] derivedKey = PKCS12PBECipherCore.derive(passwdChars, salt, |
| iCount, hmac.getDigestLength(), PKCS12PBECipherCore.MAC_KEY); |
| SecretKey cipherKey = new SecretKeySpec(derivedKey, "HmacSHA1"); |
| hmac.init(cipherKey, null); |
| } |
| |
| /** |
| * Processes the given byte. |
| * |
| * @param input the input byte to be processed. |
| */ |
| protected void engineUpdate(byte input) { |
| hmac.update(input); |
| } |
| |
| /** |
| * Processes the first <code>len</code> bytes in <code>input</code>, |
| * starting at <code>offset</code>. |
| * |
| * @param input the input buffer. |
| * @param offset the offset in <code>input</code> where the input starts. |
| * @param len the number of bytes to process. |
| */ |
| protected void engineUpdate(byte input[], int offset, int len) { |
| hmac.update(input, offset, len); |
| } |
| |
| protected void engineUpdate(ByteBuffer input) { |
| hmac.update(input); |
| } |
| |
| /** |
| * Completes the HMAC computation and resets the HMAC for further use, |
| * maintaining the secret key that the HMAC was initialized with. |
| * |
| * @return the HMAC result. |
| */ |
| protected byte[] engineDoFinal() { |
| return hmac.doFinal(); |
| } |
| |
| /** |
| * Resets the HMAC for further use, maintaining the secret key that the |
| * HMAC was initialized with. |
| */ |
| protected void engineReset() { |
| hmac.reset(); |
| } |
| |
| /* |
| * Clones this object. |
| */ |
| public Object clone() { |
| HmacPKCS12PBESHA1 that = null; |
| try { |
| that = (HmacPKCS12PBESHA1)super.clone(); |
| that.hmac = (HmacCore)this.hmac.clone(); |
| } catch (CloneNotSupportedException e) { |
| } |
| return that; |
| } |
| } |