0N/A/*
2362N/A * Copyright (c) 1999, 2007, Oracle and/or its affiliates. All rights reserved.
0N/A * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
0N/A *
0N/A * This code is free software; you can redistribute it and/or modify it
0N/A * under the terms of the GNU General Public License version 2 only, as
2362N/A * published by the Free Software Foundation. Oracle designates this
0N/A * particular file as subject to the "Classpath" exception as provided
2362N/A * by Oracle in the LICENSE file that accompanied this code.
0N/A *
0N/A * This code is distributed in the hope that it will be useful, but WITHOUT
0N/A * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
0N/A * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
0N/A * version 2 for more details (a copy is included in the LICENSE file that
0N/A * accompanied this code).
0N/A *
0N/A * You should have received a copy of the GNU General Public License version
0N/A * 2 along with this work; if not, write to the Free Software Foundation,
0N/A * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
0N/A *
2362N/A * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
2362N/A * or visit www.oracle.com if you need additional information or have any
2362N/A * questions.
0N/A */
0N/A
0N/Apackage com.sun.crypto.provider;
0N/A
0N/Aimport java.security.Key;
0N/Aimport java.security.PublicKey;
0N/Aimport java.security.PrivateKey;
0N/Aimport java.security.KeyFactory;
0N/Aimport java.security.InvalidKeyException;
0N/Aimport java.security.NoSuchProviderException;
0N/Aimport java.security.NoSuchAlgorithmException;
0N/Aimport java.security.spec.PKCS8EncodedKeySpec;
0N/Aimport java.security.spec.X509EncodedKeySpec;
0N/Aimport java.security.spec.InvalidKeySpecException;
0N/A
0N/Aimport javax.crypto.Cipher;
0N/Aimport javax.crypto.CipherSpi;
0N/Aimport javax.crypto.SecretKey;
0N/Aimport javax.crypto.IllegalBlockSizeException;
0N/Aimport javax.crypto.BadPaddingException;
0N/Aimport javax.crypto.spec.SecretKeySpec;
0N/A
0N/A/**
0N/A * This class entends the javax.crypto.CipherSpi class with a concrete
0N/A * implementation of the methods for wrapping and unwrapping
0N/A * keys.
0N/A *
0N/A * @author Sharon Liu
0N/A *
0N/A *
0N/A * @see javax.crypto.CipherSpi
0N/A * @see BlowfishCipher
0N/A * @see DESCipher
0N/A * @see PBEWithMD5AndDESCipher
0N/A */
0N/A
0N/Apublic abstract class CipherWithWrappingSpi extends CipherSpi {
0N/A
0N/A /**
0N/A * Wrap a key.
0N/A *
0N/A * @param key the key to be wrapped.
0N/A *
0N/A * @return the wrapped key.
0N/A *
0N/A * @exception IllegalBlockSizeException if this cipher is a block
0N/A * cipher, no padding has been requested, and the length of the
0N/A * encoding of the key to be wrapped is not a
0N/A * multiple of the block size.
0N/A *
0N/A * @exception InvalidKeyException if it is impossible or unsafe to
0N/A * wrap the key with this cipher (e.g., a hardware protected key is
0N/A * being passed to a software only cipher).
0N/A */
0N/A protected final byte[] engineWrap(Key key)
0N/A throws IllegalBlockSizeException, InvalidKeyException
0N/A {
0N/A byte[] result = null;
0N/A
0N/A try {
0N/A byte[] encodedKey = key.getEncoded();
0N/A if ((encodedKey == null) || (encodedKey.length == 0)) {
0N/A throw new InvalidKeyException("Cannot get an encoding of " +
0N/A "the key to be wrapped");
0N/A }
0N/A
0N/A result = engineDoFinal(encodedKey, 0, encodedKey.length);
0N/A } catch (BadPaddingException e) {
0N/A // Should never happen
0N/A }
0N/A
0N/A return result;
0N/A }
0N/A
0N/A /**
0N/A * Unwrap a previously wrapped key.
0N/A *
0N/A * @param wrappedKey the key to be unwrapped.
0N/A *
0N/A * @param wrappedKeyAlgorithm the algorithm the wrapped key is for.
0N/A *
0N/A * @param wrappedKeyType the type of the wrapped key.
0N/A * This is one of <code>Cipher.SECRET_KEY</code>,
0N/A * <code>Cipher.PRIVATE_KEY</code>, or <code>Cipher.PUBLIC_KEY</code>.
0N/A *
0N/A * @return the unwrapped key.
0N/A *
0N/A * @exception InvalidKeyException if <code>wrappedKey</code> does not
0N/A * represent a wrapped key, or if the algorithm associated with the
0N/A * wrapped key is different from <code>wrappedKeyAlgorithm</code>
0N/A * and/or its key type is different from <code>wrappedKeyType</code>.
0N/A *
0N/A * @exception NoSuchAlgorithmException if no installed providers
0N/A * can create keys for the <code>wrappedKeyAlgorithm</code>.
0N/A */
0N/A protected final Key engineUnwrap(byte[] wrappedKey,
0N/A String wrappedKeyAlgorithm,
0N/A int wrappedKeyType)
0N/A throws InvalidKeyException, NoSuchAlgorithmException
0N/A {
0N/A byte[] encodedKey;
0N/A Key result = null;
0N/A
0N/A try {
0N/A encodedKey = engineDoFinal(wrappedKey, 0,
0N/A wrappedKey.length);
0N/A } catch (BadPaddingException ePadding) {
0N/A throw new InvalidKeyException();
0N/A } catch (IllegalBlockSizeException eBlockSize) {
0N/A throw new InvalidKeyException();
0N/A }
0N/A
0N/A switch (wrappedKeyType) {
0N/A case Cipher.SECRET_KEY:
0N/A result = constructSecretKey(encodedKey,
0N/A wrappedKeyAlgorithm);
0N/A break;
0N/A case Cipher.PRIVATE_KEY:
0N/A result = constructPrivateKey(encodedKey,
0N/A wrappedKeyAlgorithm);
0N/A break;
0N/A case Cipher.PUBLIC_KEY:
0N/A result = constructPublicKey(encodedKey,
0N/A wrappedKeyAlgorithm);
0N/A break;
0N/A }
0N/A
0N/A return result;
0N/A
0N/A }
0N/A
0N/A /**
0N/A * Construct a public key from its encoding.
0N/A *
0N/A * @param encodedKey the encoding of a public key.
0N/A *
0N/A * @param encodedKeyAlgorithm the algorithm the encodedKey is for.
0N/A *
0N/A * @return a public key constructed from the encodedKey.
0N/A */
0N/A private final PublicKey constructPublicKey(byte[] encodedKey,
0N/A String encodedKeyAlgorithm)
0N/A throws InvalidKeyException, NoSuchAlgorithmException
0N/A {
0N/A PublicKey key = null;
0N/A
0N/A try {
0N/A KeyFactory keyFactory =
0N/A KeyFactory.getInstance(encodedKeyAlgorithm, "SunJCE");
0N/A X509EncodedKeySpec keySpec = new X509EncodedKeySpec(encodedKey);
0N/A key = keyFactory.generatePublic(keySpec);
0N/A } catch (NoSuchAlgorithmException nsae) {
0N/A // Try to see whether there is another
0N/A // provider which supports this algorithm
0N/A try {
0N/A KeyFactory keyFactory =
0N/A KeyFactory.getInstance(encodedKeyAlgorithm);
0N/A X509EncodedKeySpec keySpec =
0N/A new X509EncodedKeySpec(encodedKey);
0N/A key = keyFactory.generatePublic(keySpec);
0N/A } catch (NoSuchAlgorithmException nsae2) {
0N/A throw new NoSuchAlgorithmException("No installed providers " +
0N/A "can create keys for the " +
0N/A encodedKeyAlgorithm +
0N/A "algorithm");
0N/A } catch (InvalidKeySpecException ikse2) {
0N/A // Should never happen.
0N/A }
0N/A } catch (InvalidKeySpecException ikse) {
0N/A // Should never happen.
0N/A } catch (NoSuchProviderException nspe) {
0N/A // Should never happen.
0N/A }
0N/A
0N/A return key;
0N/A }
0N/A
0N/A /**
0N/A * Construct a private key from its encoding.
0N/A *
0N/A * @param encodedKey the encoding of a private key.
0N/A *
0N/A * @param encodedKeyAlgorithm the algorithm the wrapped key is for.
0N/A *
0N/A * @return a private key constructed from the encodedKey.
0N/A */
0N/A private final PrivateKey constructPrivateKey(byte[] encodedKey,
0N/A String encodedKeyAlgorithm)
0N/A throws InvalidKeyException, NoSuchAlgorithmException
0N/A {
0N/A PrivateKey key = null;
0N/A
0N/A try {
0N/A KeyFactory keyFactory =
0N/A KeyFactory.getInstance(encodedKeyAlgorithm, "SunJCE");
0N/A PKCS8EncodedKeySpec keySpec = new PKCS8EncodedKeySpec(encodedKey);
0N/A return keyFactory.generatePrivate(keySpec);
0N/A } catch (NoSuchAlgorithmException nsae) {
0N/A // Try to see whether there is another
0N/A // provider which supports this algorithm
0N/A try {
0N/A KeyFactory keyFactory =
0N/A KeyFactory.getInstance(encodedKeyAlgorithm);
0N/A PKCS8EncodedKeySpec keySpec =
0N/A new PKCS8EncodedKeySpec(encodedKey);
0N/A key = keyFactory.generatePrivate(keySpec);
0N/A } catch (NoSuchAlgorithmException nsae2) {
0N/A throw new NoSuchAlgorithmException("No installed providers " +
0N/A "can create keys for the " +
0N/A encodedKeyAlgorithm +
0N/A "algorithm");
0N/A } catch (InvalidKeySpecException ikse2) {
0N/A // Should never happen.
0N/A }
0N/A } catch (InvalidKeySpecException ikse) {
0N/A // Should never happen.
0N/A } catch (NoSuchProviderException nspe) {
0N/A // Should never happen.
0N/A }
0N/A
0N/A return key;
0N/A }
0N/A
0N/A /**
0N/A * Construct a secret key from its encoding.
0N/A *
0N/A * @param encodedKey the encoding of a secret key.
0N/A *
0N/A * @param encodedKeyAlgorithm the algorithm the secret key is for.
0N/A *
0N/A * @return a secret key constructed from the encodedKey.
0N/A */
0N/A private final SecretKey constructSecretKey(byte[] encodedKey,
0N/A String encodedKeyAlgorithm)
0N/A {
0N/A return (new SecretKeySpec(encodedKey, encodedKeyAlgorithm));
0N/A }
0N/A}