gnu.javax.crypto.key

Class GnuSecretKey

Implemented Interfaces:
Key, Serializable

public class GnuSecretKey
extends Object
implements Key

A secret key composed of a sequence of raw, unformatted octets. This class is analogous to the SecretKeySpec class, but is provided for platforms that do not or cannot contain that class.

Fields inherited from interface java.security.Key

serialVersionUID

Constructor Summary

GnuSecretKey(byte[] key, int offset, int length, String algorithm)
Creates a new secret key from a portion of a byte array.
GnuSecretKey(byte[] key, String algorithm)
Creates a new secret key.

Method Summary

boolean
equals(Object o)
Determine whether this Object is semantically equal to another Object.
String
getAlgorithm()
Returns the algorithm name, if any.
byte[]
getEncoded()
Returns the encoded key, which is merely the byte array this class was created with.
String
getFormat()
Returns the string "RAW".
String
toString()
Convert this Object to a human-readable String.

Methods inherited from class java.lang.Object

clone, equals, extends Object> getClass, finalize, hashCode, notify, notifyAll, toString, wait, wait, wait

Constructor Details

GnuSecretKey

public GnuSecretKey(byte[] key,
                    int offset,
                    int length,
                    String algorithm)
Creates a new secret key from a portion of a byte array.
Parameters:
key - The raw, secret key.
offset - The offset at which the key begins.
length - The number of bytes that comprise the key.
algorithm - The algorithm name, which can be null or empty.

GnuSecretKey

public GnuSecretKey(byte[] key,
                    String algorithm)
Creates a new secret key. The supplied byte array is copied by this constructor.
Parameters:
key - The raw, secret key.
algorithm - The algorithm name, which can be null or empty.

Method Details

equals

public boolean equals(Object o)
Determine whether this Object is semantically equal to another Object.

There are some fairly strict requirements on this method which subclasses must follow:

  • It must be transitive. If a.equals(b) and b.equals(c), then a.equals(c) must be true as well.
  • It must be symmetric. a.equals(b) and b.equals(a) must have the same value.
  • It must be reflexive. a.equals(a) must always be true.
  • It must be consistent. Whichever value a.equals(b) returns on the first invocation must be the value returned on all later invocations.
  • a.equals(null) must be false.
  • It must be consistent with hashCode(). That is, a.equals(b) must imply a.hashCode() == b.hashCode(). The reverse is not true; two objects that are not equal may have the same hashcode, but that has the potential to harm hashing performance.

This is typically overridden to throw a ClassCastException if the argument is not comparable to the class performing the comparison, but that is not a requirement. It is legal for a.equals(b) to be true even though a.getClass() != b.getClass(). Also, it is typical to never cause a NullPointerException.

In general, the Collections API (java.util) use the equals method rather than the == operator to compare objects. However, IdentityHashMap is an exception to this rule, for its own good reasons.

The default implementation returns this == o.

Overrides:
equals in interface Object
Parameters:
Returns:
whether this Object is semantically equal to another

getAlgorithm

public String getAlgorithm()
Returns the algorithm name, if any.
Specified by:
getAlgorithm in interface Key
Returns:
The algorithm name.

getEncoded

public byte[] getEncoded()
Returns the encoded key, which is merely the byte array this class was created with. A reference to the internal byte array is returned, so the caller can delete this key from memory by modifying the returned array.
Specified by:
getEncoded in interface Key
Returns:
The raw key.

getFormat

public String getFormat()
Returns the string "RAW".
Specified by:
getFormat in interface Key
Returns:
The string "RAW".

toString

public String toString()
Convert this Object to a human-readable String. There are no limits placed on how long this String should be or what it should contain. We suggest you make it as intuitive as possible to be able to place it into System.out.println() and such.

It is typical, but not required, to ensure that this method never completes abruptly with a RuntimeException.

This method will be called when performing string concatenation with this object. If the result is null, string concatenation will instead use "null".

The default implementation returns getClass().getName() + "@" + Integer.toHexString(hashCode()).

Overrides:
toString in interface Object
Returns:
the String representing this Object, which may be null

GnuSecretKey.java -- Copyright (C) 2003, 2006 Free Software Foundation, Inc. This file is a part of GNU Classpath. GNU Classpath is free software; you can redistribute it and/or modify it under the terms of the GNU General Public License as published by the Free Software Foundation; either version 2 of the License, or (at your option) any later version. GNU Classpath 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 for more details. You should have received a copy of the GNU General Public License along with GNU Classpath; if not, write to the Free Software Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA Linking this library statically or dynamically with other modules is making a combined work based on this library. Thus, the terms and conditions of the GNU General Public License cover the whole combination. As a special exception, the copyright holders of this library give you permission to link this library with independent modules to produce an executable, regardless of the license terms of these independent modules, and to copy and distribute the resulting executable under terms of your choice, provided that you also meet, for each linked independent module, the terms and conditions of the license of that module. An independent module is a module which is not derived from or based on this library. If you modify this library, you may extend this exception to your version of the library, but you are not obligated to do so. If you do not wish to do so, delete this exception statement from your version.