0N/A/*
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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
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0N/A * You should have received a copy of the GNU General Public License version
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0N/A */
0N/A
0N/Apackage com.sun.crypto.provider;
0N/A
0N/Aimport javax.crypto.SecretKey;
0N/Aimport javax.crypto.SecretKeyFactorySpi;
0N/Aimport javax.crypto.spec.DESKeySpec;
0N/Aimport java.security.InvalidKeyException;
0N/Aimport java.security.spec.KeySpec;
0N/Aimport java.security.spec.InvalidKeySpecException;
0N/A
0N/A/**
0N/A * This class implements the DES key factory of the Sun provider.
0N/A *
0N/A * @author Jan Luehe
0N/A *
0N/A */
0N/A
0N/Apublic final class DESKeyFactory extends SecretKeyFactorySpi {
0N/A
0N/A /**
1460N/A * Empty constructor
0N/A */
0N/A public DESKeyFactory() {
0N/A }
1460N/A
0N/A /**
0N/A * Generates a <code>SecretKey</code> object from the provided key
0N/A * specification (key material).
0N/A *
0N/A * @param keySpec the specification (key material) of the secret key
0N/A *
0N/A * @return the secret key
0N/A *
0N/A * @exception InvalidKeySpecException if the given key specification
0N/A * is inappropriate for this key factory to produce a public key.
0N/A */
0N/A protected SecretKey engineGenerateSecret(KeySpec keySpec)
0N/A throws InvalidKeySpecException {
0N/A DESKey desKey = null;
0N/A
0N/A try {
0N/A if (!(keySpec instanceof DESKeySpec)) {
0N/A throw new InvalidKeySpecException
0N/A ("Inappropriate key specification");
0N/A }
0N/A else {
0N/A DESKeySpec desKeySpec = (DESKeySpec)keySpec;
0N/A desKey = new DESKey(desKeySpec.getKey());
0N/A }
0N/A } catch (InvalidKeyException e) {
0N/A }
0N/A return desKey;
0N/A }
0N/A
0N/A /**
0N/A * Returns a specification (key material) of the given key
0N/A * in the requested format.
0N/A *
0N/A * @param key the key
0N/A *
0N/A * @param keySpec the requested format in which the key material shall be
0N/A * returned
0N/A *
0N/A * @return the underlying key specification (key material) in the
0N/A * requested format
0N/A *
0N/A * @exception InvalidKeySpecException if the requested key specification is
0N/A * inappropriate for the given key, or the given key cannot be processed
0N/A * (e.g., the given key has an unrecognized algorithm or format).
0N/A */
0N/A protected KeySpec engineGetKeySpec(SecretKey key, Class keySpec)
0N/A throws InvalidKeySpecException {
0N/A
0N/A try {
0N/A
0N/A if ((key instanceof SecretKey)
0N/A && (key.getAlgorithm().equalsIgnoreCase("DES"))
0N/A && (key.getFormat().equalsIgnoreCase("RAW"))) {
0N/A
0N/A // Check if requested key spec is amongst the valid ones
0N/A if ((keySpec != null) &&
0N/A DESKeySpec.class.isAssignableFrom(keySpec)) {
0N/A return new DESKeySpec(key.getEncoded());
0N/A
0N/A } else {
0N/A throw new InvalidKeySpecException
0N/A ("Inappropriate key specification");
0N/A }
0N/A
0N/A } else {
0N/A throw new InvalidKeySpecException
0N/A ("Inappropriate key format/algorithm");
0N/A }
0N/A
0N/A } catch (InvalidKeyException e) {
0N/A throw new InvalidKeySpecException("Secret key has wrong size");
0N/A }
0N/A }
0N/A
0N/A /**
0N/A * Translates a <code>SecretKey</code> object, whose provider may be
0N/A * unknown or potentially untrusted, into a corresponding
0N/A * <code>SecretKey</code> object of this key factory.
0N/A *
0N/A * @param key the key whose provider is unknown or untrusted
0N/A *
0N/A * @return the translated key
0N/A *
0N/A * @exception InvalidKeyException if the given key cannot be processed by
0N/A * this key factory.
0N/A */
0N/A protected SecretKey engineTranslateKey(SecretKey key)
0N/A throws InvalidKeyException {
0N/A
0N/A try {
0N/A
0N/A if ((key != null) &&
0N/A (key.getAlgorithm().equalsIgnoreCase("DES")) &&
0N/A (key.getFormat().equalsIgnoreCase("RAW"))) {
0N/A
0N/A // Check if key originates from this factory
0N/A if (key instanceof com.sun.crypto.provider.DESKey) {
0N/A return key;
0N/A }
0N/A // Convert key to spec
0N/A DESKeySpec desKeySpec
0N/A = (DESKeySpec)engineGetKeySpec(key, DESKeySpec.class);
0N/A // Create key from spec, and return it
0N/A return engineGenerateSecret(desKeySpec);
0N/A
0N/A } else {
0N/A throw new InvalidKeyException
0N/A ("Inappropriate key format/algorithm");
0N/A }
0N/A
0N/A } catch (InvalidKeySpecException e) {
0N/A throw new InvalidKeyException("Cannot translate key");
0N/A }
0N/A }
0N/A}