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// Copyright (c) 2002 Graz University of Technology. All rights reserved.
//
// Redistribution and use in source and binary forms, with or without
// modification, are permitted provided that the following conditions are met:
//
// 1. Redistributions of source code must retain the above copyright notice,
// this list of conditions and the following disclaimer.
//
// 2. Redistributions in binary form must reproduce the above copyright notice,
// this list of conditions and the following disclaimer in the documentation
// and/or other materials provided with the distribution.
//
// 3. The end-user documentation included with the redistribution, if any, must
// include the following acknowledgment:
//
// "This product includes software developed by IAIK of Graz University of
// Technology."
//
// Alternately, this acknowledgment may appear in the software itself, if and
// wherever such third-party acknowledgments normally appear.
//
// 4. The names "Graz University of Technology" and "IAIK of Graz University of
// Technology" must not be used to endorse or promote products derived from
// this software without prior written permission.
//
// 5. Products derived from this software may not be called "IAIK PKCS Wrapper",
// nor may "IAIK" appear in their name, without prior written permission of
// Graz University of Technology.
//
// THIS SOFTWARE IS PROVIDED "AS IS" AND ANY EXPRESSED OR IMPLIED
// WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
// WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
// PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE LICENSOR BE
// LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY,
// OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
// PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA,
// OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON
// ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
// OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
// OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
// POSSIBILITY OF SUCH DAMAGE.
package iaik.pkcs.pkcs11.objects;
import iaik.pkcs.pkcs11.Session;
import iaik.pkcs.pkcs11.TokenException;
import iaik.pkcs.pkcs11.Util;
import iaik.pkcs.pkcs11.wrapper.Constants;
/**
* Objects of this class represent Twofish secret keys as specified by
* PKCS#11 v2.20.
*
* @author Karl Scheibelhofer
* @version 1.0
* @invariants (value_ <> null)
* and (valueLen_ <> null)
*/
public class TwofishSecretKey extends SecretKey {
/**
* The value attribute of this secret key.
*/
protected ByteArrayAttribute value_;
/**
* The length of this secret key in bytes.
*/
protected LongAttribute valueLen_;
/**
* Default Constructor.
*
* @preconditions
* @postconditions
*/
public TwofishSecretKey() {
super();
keyType_.setLongValue(KeyType.GENERIC_SECRET);
}
/**
* Called by getInstance to create an instance of a PKCS#11 generic secret
* key.
*
* @param session
* The session to use for reading attributes. This session must
* have the appropriate rights; i.e. it must be a user-session, if
* it is a private object.
* @param objectHandle
* The object handle as given from the PKCS#111 module.
* @exception TokenException
* If getting the attributes failed.
* @preconditions (session <> null)
* @postconditions
*/
protected TwofishSecretKey(Session session, long objectHandle)
throws TokenException {
super(session, objectHandle);
keyType_.setLongValue(KeyType.GENERIC_SECRET);
}
/**
* The getInstance method of the SecretKey class uses this method to create
* an instance of a PKCS#11 generic Secret key.
*
* @param session
* The session to use for reading attributes. This session must
* have the appropriate rights; i.e. it must be a user-session, if
* it is a private object.
* @param objectHandle
* The object handle as given from the PKCS#111 module.
* @return The object representing the PKCS#11 object.
* The returned object can be casted to the
* according sub-class.
* @exception TokenException
* If getting the attributes failed.
* @preconditions (session <> null)
* @postconditions (result <> null)
*/
public static Object getInstance(Session session, long objectHandle)
throws TokenException {
return new TwofishSecretKey(session, objectHandle);
}
/**
* Put all attributes of the given object into the attributes table of this
* object. This method is only static to be able to access invoke the
* implementation of this method for each class separately (see use in
* clone()).
*
* @param object
* The object to handle.
* @preconditions (object <> null)
* @postconditions
*/
protected static void putAttributesInTable(TwofishSecretKey object) {
Util.requireNonNull("object", object);
object.attributeTable_.put(Attribute.VALUE, object.value_);
object.attributeTable_.put(Attribute.VALUE_LEN, object.valueLen_);
}
/**
* Allocates the attribute objects for this class and adds them to the
* attribute table.
*
* @preconditions
* @postconditions
*/
@Override
protected void allocateAttributes() {
super.allocateAttributes();
value_ = new ByteArrayAttribute(Attribute.VALUE);
valueLen_ = new LongAttribute(Attribute.VALUE_LEN);
putAttributesInTable(this);
}
/**
* Create a (deep) clone of this object.
*
* @return A clone of this object.
* @preconditions
* @postconditions (result <> null)
* and (result instanceof GenericSecretKey)
* and (result.equals(this))
*/
@Override
public java.lang.Object clone() {
TwofishSecretKey clone = (TwofishSecretKey) super.clone();
clone.value_ = (ByteArrayAttribute) this.value_.clone();
clone.valueLen_ = (LongAttribute) this.valueLen_.clone();
// put all cloned attributes into the new table
putAttributesInTable(clone);
return clone;
}
/**
* Compares all member variables of this object with the other object.
* Returns only true, if all are equal in both objects.
*
* @param otherObject
* The other object to compare to.
* @return True, if other is an instance of this class and all member
* variables of both objects are equal. False, otherwise.
* @preconditions
* @postconditions
*/
@Override
public boolean equals(java.lang.Object otherObject) {
if (this == otherObject) {
return true;
}
if (!(otherObject instanceof TwofishSecretKey)) {
return false;
}
TwofishSecretKey other = (TwofishSecretKey) otherObject;
return super.equals(other)
&& this.value_.equals(other.value_)
&& this.valueLen_.equals(other.valueLen_);
}
/**
* Gets the value attribute of this generic key.
*
* @return The value attribute.
* @preconditions
* @postconditions (result <> null)
*/
public ByteArrayAttribute getValue() {
return value_;
}
/**
* Gets the value length attribute of this generic key (in bytes).
*
* @return The value attribute.
* @preconditions
* @postconditions (result <> null)
*/
public LongAttribute getValueLen() {
return valueLen_;
}
/**
* Read the values of the attributes of this object from the token.
*
* @param session
* The session to use for reading attributes. This session must
* have the appropriate rights; i.e. it must be a user-session, if
* it is a private object.
* @exception TokenException
* If getting the attributes failed.
* @preconditions (session <> null)
* @postconditions
*/
@Override
public void readAttributes(Session session)
throws TokenException {
super.readAttributes(session);
Object.getAttributeValue(session, objectHandle_, value_);
Object.getAttributeValue(session, objectHandle_, valueLen_);
}
/**
* This method returns a string representation of the current object. The
* output is only for debugging purposes and should not be used for other
* purposes.
*
* @return A string presentation of this object for debugging output.
* @preconditions
* @postconditions (result <> null)
*/
@Override
public String toString() {
StringBuilder buffer = new StringBuilder(1024);
buffer.append(super.toString());
buffer.append(Constants.NEWLINE_INDENT_HEXVALUE);
buffer.append(value_.toString());
buffer.append(Constants.NEWLINE_INDENT_VALUELEN);
buffer.append(valueLen_.toString(10));
return buffer.toString();
}
}
