| /* |
| * Copyright (c) 2005, 2011, 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.InvalidKeyException; |
| import java.security.spec.KeySpec; |
| import java.security.spec.InvalidKeySpecException; |
| import javax.crypto.SecretKey; |
| import javax.crypto.SecretKeyFactorySpi; |
| import javax.crypto.spec.PBEKeySpec; |
| |
| /** |
| * This class implements a key factory for PBE keys derived using |
| * PBKDF2 with HmacSHA1 psuedo random function(PRF) as defined in |
| * PKCS#5 v2.0. |
| * |
| * @author Valerie Peng |
| * |
| */ |
| public final class PBKDF2HmacSHA1Factory extends SecretKeyFactorySpi { |
| |
| /** |
| * Empty constructor |
| */ |
| public PBKDF2HmacSHA1Factory() { |
| } |
| |
| /** |
| * Generates a <code>SecretKey</code> object from the provided key |
| * specification (key material). |
| * |
| * @param keySpec the specification (key material) of the secret key |
| * |
| * @return the secret key |
| * |
| * @exception InvalidKeySpecException if the given key specification |
| * is inappropriate for this key factory to produce a public key. |
| */ |
| protected SecretKey engineGenerateSecret(KeySpec keySpec) |
| throws InvalidKeySpecException |
| { |
| if (!(keySpec instanceof PBEKeySpec)) { |
| throw new InvalidKeySpecException("Invalid key spec"); |
| } |
| PBEKeySpec ks = (PBEKeySpec) keySpec; |
| return new PBKDF2KeyImpl(ks, "HmacSHA1"); |
| } |
| |
| /** |
| * Returns a specification (key material) of the given key |
| * in the requested format. |
| * |
| * @param key the key |
| * |
| * @param keySpecCl the requested format in which the key material shall be |
| * returned |
| * |
| * @return the underlying key specification (key material) in the |
| * requested format |
| * |
| * @exception InvalidKeySpecException if the requested key |
| * specification is inappropriate for the given key, or the |
| * given key cannot be processed (e.g., the given key has an |
| * unrecognized algorithm or format). |
| */ |
| protected KeySpec engineGetKeySpec(SecretKey key, Class<?> keySpecCl) |
| throws InvalidKeySpecException { |
| if (key instanceof javax.crypto.interfaces.PBEKey) { |
| // Check if requested key spec is amongst the valid ones |
| if ((keySpecCl != null) |
| && PBEKeySpec.class.isAssignableFrom(keySpecCl)) { |
| javax.crypto.interfaces.PBEKey pKey = |
| (javax.crypto.interfaces.PBEKey) key; |
| return new PBEKeySpec |
| (pKey.getPassword(), pKey.getSalt(), |
| pKey.getIterationCount(), pKey.getEncoded().length*8); |
| } else { |
| throw new InvalidKeySpecException("Invalid key spec"); |
| } |
| } else { |
| throw new InvalidKeySpecException("Invalid key " + |
| "format/algorithm"); |
| } |
| } |
| |
| /** |
| * Translates a <code>SecretKey</code> object, whose provider may be |
| * unknown or potentially untrusted, into a corresponding |
| * <code>SecretKey</code> object of this key factory. |
| * |
| * @param key the key whose provider is unknown or untrusted |
| * |
| * @return the translated key |
| * |
| * @exception InvalidKeyException if the given key cannot be processed by |
| * this key factory. |
| */ |
| protected SecretKey engineTranslateKey(SecretKey key) |
| throws InvalidKeyException { |
| if ((key != null) && |
| (key.getAlgorithm().equalsIgnoreCase("PBKDF2WithHmacSHA1")) && |
| (key.getFormat().equalsIgnoreCase("RAW"))) { |
| |
| // Check if key originates from this factory |
| if (key instanceof com.sun.crypto.provider.PBKDF2KeyImpl) { |
| return key; |
| } |
| // Check if key implements the PBEKey |
| if (key instanceof javax.crypto.interfaces.PBEKey) { |
| javax.crypto.interfaces.PBEKey pKey = |
| (javax.crypto.interfaces.PBEKey) key; |
| try { |
| PBEKeySpec spec = |
| new PBEKeySpec(pKey.getPassword(), |
| pKey.getSalt(), |
| pKey.getIterationCount(), |
| pKey.getEncoded().length*8); |
| return new PBKDF2KeyImpl(spec, "HmacSHA1"); |
| } catch (InvalidKeySpecException re) { |
| InvalidKeyException ike = new InvalidKeyException |
| ("Invalid key component(s)"); |
| ike.initCause(re); |
| throw ike; |
| } |
| } |
| } |
| throw new InvalidKeyException("Invalid key format/algorithm"); |
| } |
| } |