/*
* DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
*
* 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.
*/
/**
* This class implements the DES-EDE key factory of the Sun provider.
*
* @author Jan Luehe
*
*/
/**
* Empty constructor
*/
public DESedeKeyFactory() {
}
/**
* 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.
*/
throws InvalidKeySpecException {
try {
if (keySpec instanceof DESedeKeySpec) {
} else {
throw new InvalidKeySpecException
("Inappropriate key specification");
}
} catch (InvalidKeyException e) {
}
return desEdeKey;
}
/**
* Returns a specification (key material) of the given key
* in the requested format.
*
* @param key the key
*
* @param keySpec 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).
*/
throws InvalidKeySpecException {
try {
// Check if requested key spec is amongst the valid ones
} else {
throw new InvalidKeySpecException
("Inappropriate key specification");
}
} else {
throw new InvalidKeySpecException
}
} catch (InvalidKeyException e) {
throw new InvalidKeySpecException("Secret key has wrong size");
}
}
/**
* 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.
*/
throws InvalidKeyException {
try {
// Check if key originates from this factory
return key;
}
// Convert key to spec
DESedeKeySpec.class);
// Create key from spec, and return it
return engineGenerateSecret(desEdeKeySpec);
} else {
throw new InvalidKeyException
}
} catch (InvalidKeySpecException e) {
throw new InvalidKeyException("Cannot translate key");
}
}
}