/* * Copyright (c) 1998, 2007, Oracle and/or its affiliates. All rights reserved. * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. * * This code is free software; you can redistribute it and/or modify it * 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. */package javax.crypto.spec;import java.io.UnsupportedEncodingException;import java.security.Key;import java.security.spec.KeySpec;import javax.crypto.SecretKey;/** * This class specifies a secret key in a provider-independent fashion. * * <p>It can be used to construct a <code>SecretKey</code> from a byte array, * without having to go through a (provider-based) * <code>SecretKeyFactory</code>. * * <p>This class is only useful for raw secret keys that can be represented as * a byte array and have no key parameters associated with them, e.g., DES or * Triple DES keys. * * @author Jan Luehe * * @see javax.crypto.SecretKey * @see javax.crypto.SecretKeyFactory * @since 1.4 */public class SecretKeySpec implements KeySpec, SecretKey { private static final long serialVersionUID = 6577238317307289933L; /** * The secret key. * * @serial */ private byte[] key; /** * The name of the algorithm associated with this key. * * @serial */ private String algorithm; /** * Constructs a secret key from the given byte array. * * <p>This constructor does not check if the given bytes indeed specify a * secret key of the specified algorithm. For example, if the algorithm is * DES, this constructor does not check if <code>key</code> is 8 bytes * long, and also does not check for weak or semi-weak keys. * In order for those checks to be performed, an algorithm-specific * <i>key specification</i> class (in this case: * {@link DESKeySpec DESKeySpec}) * should be used. * * @param key the key material of the secret key. The contents of * the array are copied to protect against subsequent modification. * @param algorithm the name of the secret-key algorithm to be associated * with the given key material. * See Appendix A in the <a href= * "{@docRoot}/../technotes/guides/security/crypto/CryptoSpec.html#AppA"> * Java Cryptography Architecture Reference Guide</a> * for information about standard algorithm names. * @exception IllegalArgumentException if <code>algorithm</code> * is null or <code>key</code> is null or empty. */ public SecretKeySpec(byte[] key, String algorithm) { if (key == null || algorithm == null) { throw new IllegalArgumentException("Missing argument"); } if (key.length == 0) { throw new IllegalArgumentException("Empty key"); } this.key = (byte[])key.clone(); this.algorithm = algorithm; } /** * Constructs a secret key from the given byte array, using the first * <code>len</code> bytes of <code>key</code>, starting at * <code>offset</code> inclusive. * * <p> The bytes that constitute the secret key are * those between <code>key[offset]</code> and * <code>key[offset+len-1]</code> inclusive. * * <p>This constructor does not check if the given bytes indeed specify a * secret key of the specified algorithm. For example, if the algorithm is * DES, this constructor does not check if <code>key</code> is 8 bytes * long, and also does not check for weak or semi-weak keys. * In order for those checks to be performed, an algorithm-specific key * specification class (in this case: * {@link DESKeySpec DESKeySpec}) * must be used. * * @param key the key material of the secret key. The first * <code>len</code> bytes of the array beginning at * <code>offset</code> inclusive are copied to protect * against subsequent modification. * @param offset the offset in <code>key</code> where the key material * starts. * @param len the length of the key material. * @param algorithm the name of the secret-key algorithm to be associated * with the given key material. * See Appendix A in the <a href= * "{@docRoot}/../technotes/guides/security/crypto/CryptoSpec.html#AppA"> * Java Cryptography Architecture Reference Guide</a> * for information about standard algorithm names. * @exception IllegalArgumentException if <code>algorithm</code> * is null or <code>key</code> is null, empty, or too short, * i.e. <code>key.length-offset<len</code>. * @exception ArrayIndexOutOfBoundsException is thrown if * <code>offset</code> or <code>len</code> index bytes outside the * <code>key</code>. */ public SecretKeySpec(byte[] key, int offset, int len, String algorithm) { if (key == null || algorithm == null) { throw new IllegalArgumentException("Missing argument"); } if (key.length == 0) { throw new IllegalArgumentException("Empty key"); } if (key.length-offset < len) { throw new IllegalArgumentException ("Invalid offset/length combination"); } if (len < 0) { throw new ArrayIndexOutOfBoundsException("len is negative"); } this.key = new byte[len]; System.arraycopy(key, offset, this.key, 0, len); this.algorithm = algorithm; } /** * Returns the name of the algorithm associated with this secret key. * * @return the secret key algorithm. */ public String getAlgorithm() { return this.algorithm; } /** * Returns the name of the encoding format for this secret key. * * @return the string "RAW". */ public String getFormat() { return "RAW"; } /** * Returns the key material of this secret key. * * @return the key material. Returns a new array * each time this method is called. */ public byte[] getEncoded() { return (byte[])this.key.clone(); } /** * Calculates a hash code value for the object. * Objects that are equal will also have the same hashcode. */ public int hashCode() { int retval = 0; for (int i = 1; i < this.key.length; i++) { retval += this.key[i] * i; } if (this.algorithm.equalsIgnoreCase("TripleDES")) return (retval ^= "desede".hashCode()); else return (retval ^= this.algorithm.toLowerCase().hashCode()); } /** * Tests for equality between the specified object and this * object. Two SecretKeySpec objects are considered equal if * they are both SecretKey instances which have the * same case-insensitive algorithm name and key encoding. * * @param obj the object to test for equality with this object. * * @return true if the objects are considered equal, false if * <code>obj</code> is null or otherwise. */ public boolean equals(Object obj) { if (this == obj) return true; if (!(obj instanceof SecretKey)) return false; String thatAlg = ((SecretKey)obj).getAlgorithm(); if (!(thatAlg.equalsIgnoreCase(this.algorithm))) { if ((!(thatAlg.equalsIgnoreCase("DESede")) || !(this.algorithm.equalsIgnoreCase("TripleDES"))) && (!(thatAlg.equalsIgnoreCase("TripleDES")) || !(this.algorithm.equalsIgnoreCase("DESede")))) return false; } byte[] thatKey = ((SecretKey)obj).getEncoded(); return java.util.Arrays.equals(this.key, thatKey); }}
/*
* Copyright (c) 1998, 2007, Oracle and/or its affiliates. All rights reserved.
* DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
*
* This code is free software; you can redistribute it and/or modify it
* 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.
*/
package javax.crypto.spec;
import java.io.UnsupportedEncodingException;
import java.security.Key;
import java.security.spec.KeySpec;
import javax.crypto.SecretKey;
/**
* This class specifies a secret key in a provider-independent fashion.
*
* <p>It can be used to construct a <code>SecretKey</code> from a byte array,
* without having to go through a (provider-based)
* <code>SecretKeyFactory</code>.
*
* <p>This class is only useful for raw secret keys that can be represented as
* a byte array and have no key parameters associated with them, e.g., DES or
* Triple DES keys.
*
* @author Jan Luehe
*
* @see javax.crypto.SecretKey
* @see javax.crypto.SecretKeyFactory
* @since 1.4
*/
public class SecretKeySpec implements KeySpec, SecretKey {
private static final long serialVersionUID = 6577238317307289933L;
/**
* The secret key.
*
* @serial
*/
private byte[] key;
/**
* The name of the algorithm associated with this key.
*
* @serial
*/
private String algorithm;
/**
* Constructs a secret key from the given byte array.
*
* <p>This constructor does not check if the given bytes indeed specify a
* secret key of the specified algorithm. For example, if the algorithm is
* DES, this constructor does not check if <code>key</code> is 8 bytes
* long, and also does not check for weak or semi-weak keys.
* In order for those checks to be performed, an algorithm-specific
* <i>key specification</i> class (in this case:
* {@link DESKeySpec DESKeySpec})
* should be used.
*
* @param key the key material of the secret key. The contents of
* the array are copied to protect against subsequent modification.
* @param algorithm the name of the secret-key algorithm to be associated
* with the given key material.
* See Appendix A in the <a href=
* "{@docRoot}/../technotes/guides/security/crypto/CryptoSpec.html#AppA">
* Java Cryptography Architecture Reference Guide</a>
* for information about standard algorithm names.
* @exception IllegalArgumentException if <code>algorithm</code>
* is null or <code>key</code> is null or empty.
*/
public SecretKeySpec(byte[] key, String algorithm) {
if (key == null || algorithm == null) {
throw new IllegalArgumentException("Missing argument");
}
if (key.length == 0) {
throw new IllegalArgumentException("Empty key");
}
this.key = (byte[])key.clone();
this.algorithm = algorithm;
}
/**
* Constructs a secret key from the given byte array, using the first
* <code>len</code> bytes of <code>key</code>, starting at
* <code>offset</code> inclusive.
*
* <p> The bytes that constitute the secret key are
* those between <code>key[offset]</code> and
* <code>key[offset+len-1]</code> inclusive.
*
* <p>This constructor does not check if the given bytes indeed specify a
* secret key of the specified algorithm. For example, if the algorithm is
* DES, this constructor does not check if <code>key</code> is 8 bytes
* long, and also does not check for weak or semi-weak keys.
* In order for those checks to be performed, an algorithm-specific key
* specification class (in this case:
* {@link DESKeySpec DESKeySpec})
* must be used.
*
* @param key the key material of the secret key. The first
* <code>len</code> bytes of the array beginning at
* <code>offset</code> inclusive are copied to protect
* against subsequent modification.
* @param offset the offset in <code>key</code> where the key material
* starts.
* @param len the length of the key material.
* @param algorithm the name of the secret-key algorithm to be associated
* with the given key material.
* See Appendix A in the <a href=
* "{@docRoot}/../technotes/guides/security/crypto/CryptoSpec.html#AppA">
* Java Cryptography Architecture Reference Guide</a>
* for information about standard algorithm names.
* @exception IllegalArgumentException if <code>algorithm</code>
* is null or <code>key</code> is null, empty, or too short,
* i.e. <code>key.length-offset<len</code>.
* @exception ArrayIndexOutOfBoundsException is thrown if
* <code>offset</code> or <code>len</code> index bytes outside the
* <code>key</code>.
*/
public SecretKeySpec(byte[] key, int offset, int len, String algorithm) {
if (key == null || algorithm == null) {
throw new IllegalArgumentException("Missing argument");
}
if (key.length == 0) {
throw new IllegalArgumentException("Empty key");
}
if (key.length-offset < len) {
throw new IllegalArgumentException
("Invalid offset/length combination");
}
if (len < 0) {
throw new ArrayIndexOutOfBoundsException("len is negative");
}
this.key = new byte[len];
System.arraycopy(key, offset, this.key, 0, len);
this.algorithm = algorithm;
}
/**
* Returns the name of the algorithm associated with this secret key.
*
* @return the secret key algorithm.
*/
public String getAlgorithm() {
return this.algorithm;
}
/**
* Returns the name of the encoding format for this secret key.
*
* @return the string "RAW".
*/
public String getFormat() {
return "RAW";
}
/**
* Returns the key material of this secret key.
*
* @return the key material. Returns a new array
* each time this method is called.
*/
public byte[] getEncoded() {
return (byte[])this.key.clone();
}
/**
* Calculates a hash code value for the object.
* Objects that are equal will also have the same hashcode.
*/
public int hashCode() {
int retval = 0;
for (int i = 1; i < this.key.length; i++) {
retval += this.key[i] * i;
}
if (this.algorithm.equalsIgnoreCase("TripleDES"))
return (retval ^= "desede".hashCode());
else
return (retval ^= this.algorithm.toLowerCase().hashCode());
}
/**
* Tests for equality between the specified object and this
* object. Two SecretKeySpec objects are considered equal if
* they are both SecretKey instances which have the
* same case-insensitive algorithm name and key encoding.
*
* @param obj the object to test for equality with this object.
*
* @return true if the objects are considered equal, false if
* <code>obj</code> is null or otherwise.
*/
public boolean equals(Object obj) {
if (this == obj)
return true;
if (!(obj instanceof SecretKey))
return false;
String thatAlg = ((SecretKey)obj).getAlgorithm();
if (!(thatAlg.equalsIgnoreCase(this.algorithm))) {
if ((!(thatAlg.equalsIgnoreCase("DESede"))
|| !(this.algorithm.equalsIgnoreCase("TripleDES")))
&& (!(thatAlg.equalsIgnoreCase("TripleDES"))
|| !(this.algorithm.equalsIgnoreCase("DESede"))))
return false;
}
byte[] thatKey = ((SecretKey)obj).getEncoded();
return java.util.Arrays.equals(this.key, thatKey);
}
}