author | malenkov |
Tue, 29 Oct 2013 17:01:06 +0400 | |
changeset 21278 | ef8a3a2a72f2 |
parent 14405 | e7fff80005c1 |
child 23010 | 6dadb192ad81 |
permissions | -rw-r--r-- |
2 | 1 |
/* |
14405
e7fff80005c1
6383200: PBE: need new algorithm support in password based encryption
vinnie
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diff
changeset
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* Copyright (c) 1997, 2012, Oracle and/or its affiliates. All rights reserved. |
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* DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. |
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* |
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* This code is free software; you can redistribute it and/or modify it |
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* under the terms of the GNU General Public License version 2 only, as |
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* published by the Free Software Foundation. Oracle designates this |
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* particular file as subject to the "Classpath" exception as provided |
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* by Oracle in the LICENSE file that accompanied this code. |
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* |
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* This code is distributed in the hope that it will be useful, but WITHOUT |
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* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or |
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* FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License |
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* version 2 for more details (a copy is included in the LICENSE file that |
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* accompanied this code). |
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* |
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* You should have received a copy of the GNU General Public License version |
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* 2 along with this work; if not, write to the Free Software Foundation, |
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* Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. |
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* |
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* Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA |
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* or visit www.oracle.com if you need additional information or have any |
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* questions. |
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*/ |
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package com.sun.crypto.provider; |
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import java.io.UnsupportedEncodingException; |
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import java.security.*; |
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import java.security.spec.*; |
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import javax.crypto.*; |
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import javax.crypto.spec.*; |
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/** |
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* This class represents password-based encryption as defined by the PKCS #5 |
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* standard. |
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* The particular algorithm implemented is pbeWithMD5AndDES-CBC. |
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* Padding is done as described in PKCS #5. |
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* |
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* @author Jan Luehe |
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* |
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* |
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* @see javax.crypto.Cipher |
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*/ |
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public final class PBEWithMD5AndDESCipher extends CipherSpi { |
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// the encapsulated DES cipher |
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private PBES1Core core; |
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/** |
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* Creates an instance of this cipher, and initializes its mode (CBC) and |
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* padding (PKCS5). |
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* |
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* @exception NoSuchAlgorithmException if the required cipher mode (CBC) is |
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* unavailable |
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* @exception NoSuchPaddingException if the required padding mechanism |
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* (PKCS5Padding) is unavailable |
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*/ |
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public PBEWithMD5AndDESCipher() |
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throws NoSuchAlgorithmException, NoSuchPaddingException { |
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vinnie
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diff
changeset
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core = new PBES1Core("DES"); |
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} |
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/** |
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* Sets the mode of this cipher. This algorithm can only be run in CBC |
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* mode. |
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* |
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* @param mode the cipher mode |
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* |
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* @exception NoSuchAlgorithmException if the requested cipher mode is |
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* invalid |
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*/ |
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protected void engineSetMode(String mode) throws NoSuchAlgorithmException { |
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if ((mode != null) && (!mode.equalsIgnoreCase("CBC"))) { |
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throw new NoSuchAlgorithmException("Invalid cipher mode: " + mode); |
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} |
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} |
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/** |
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* Sets the padding mechanism of this cipher. This algorithm only uses |
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* PKCS #5 padding. |
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* |
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* @param padding the padding mechanism |
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* |
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* @exception NoSuchPaddingException if the requested padding mechanism |
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* is invalid |
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*/ |
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protected void engineSetPadding(String paddingScheme) |
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throws NoSuchPaddingException |
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{ |
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if ((paddingScheme != null) && |
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(!paddingScheme.equalsIgnoreCase("PKCS5Padding"))) { |
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throw new NoSuchPaddingException("Invalid padding scheme: " + |
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paddingScheme); |
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} |
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} |
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/** |
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* Returns the block size (in bytes). |
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* |
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* @return the block size (in bytes) |
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*/ |
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protected int engineGetBlockSize() { |
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return core.getBlockSize(); |
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} |
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/** |
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* Returns the length in bytes that an output buffer would need to be in |
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* order to hold the result of the next <code>update</code> or |
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* <code>doFinal</code> operation, given the input length |
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* <code>inputLen</code> (in bytes). |
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* |
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* <p>This call takes into account any unprocessed (buffered) data from a |
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* previous <code>update</code> call, and padding. |
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* |
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* <p>The actual output length of the next <code>update</code> or |
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* <code>doFinal</code> call may be smaller than the length returned by |
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* this method. |
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* |
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* @param inputLen the input length (in bytes) |
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* |
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* @return the required output buffer size (in bytes) |
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* |
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*/ |
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protected int engineGetOutputSize(int inputLen) { |
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return core.getOutputSize(inputLen); |
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} |
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/** |
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* Returns the initialization vector (IV) in a new buffer. |
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* |
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* <p> This is useful in the case where a random IV has been created |
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* (see <a href = "#init">init</a>), |
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* or in the context of password-based encryption or |
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* decryption, where the IV is derived from a user-supplied password. |
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* |
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* @return the initialization vector in a new buffer, or null if the |
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* underlying algorithm does not use an IV, or if the IV has not yet |
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* been set. |
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*/ |
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protected byte[] engineGetIV() { |
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return core.getIV(); |
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} |
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/** |
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* Returns the parameters used with this cipher. |
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* |
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* <p>The returned parameters may be the same that were used to initialize |
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* this cipher, or may contain the default set of parameters or a set of |
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* randomly generated parameters used by the underlying cipher |
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* implementation (provided that the underlying cipher implementation |
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* uses a default set of parameters or creates new parameters if it needs |
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* parameters but was not initialized with any). |
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* |
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* @return the parameters used with this cipher, or null if this cipher |
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* does not use any parameters. |
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*/ |
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protected AlgorithmParameters engineGetParameters() { |
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return core.getParameters(); |
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} |
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/** |
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* Initializes this cipher with a key and a source |
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* of randomness. |
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* The cipher is initialized for one of the following four operations: |
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* encryption, decryption, key wrapping or key unwrapping, depending on |
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* the value of <code>opmode</code>. |
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* |
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* <p>If this cipher (including its underlying feedback or padding scheme) |
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* requires any random bytes, it will get them from <code>random</code>. |
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* |
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* @param opmode the operation mode of this cipher (this is one of |
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* the following: |
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* <code>ENCRYPT_MODE</code>, <code>DECRYPT_MODE</code>), |
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* <code>WRAP_MODE</code> or <code>UNWRAP_MODE</code>) |
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* @param key the encryption key |
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* @param random the source of randomness |
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* |
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* @exception InvalidKeyException if the given key is inappropriate for |
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* initializing this cipher |
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*/ |
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protected void engineInit(int opmode, Key key, SecureRandom random) |
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throws InvalidKeyException { |
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try { |
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engineInit(opmode, key, (AlgorithmParameterSpec) null, random); |
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} catch (InvalidAlgorithmParameterException ie) { |
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InvalidKeyException ike = |
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new InvalidKeyException("requires PBE parameters"); |
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ike.initCause(ie); |
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throw ike; |
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} |
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} |
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/** |
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* Initializes this cipher with a key, a set of |
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* algorithm parameters, and a source of randomness. |
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* The cipher is initialized for one of the following four operations: |
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* encryption, decryption, key wrapping or key unwrapping, depending on |
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* the value of <code>opmode</code>. |
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* |
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* <p>If this cipher (including its underlying feedback or padding scheme) |
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* requires any random bytes, it will get them from <code>random</code>. |
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* |
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* @param opmode the operation mode of this cipher (this is one of |
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* the following: |
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* <code>ENCRYPT_MODE</code>, <code>DECRYPT_MODE</code>), |
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* <code>WRAP_MODE</code> or <code>UNWRAP_MODE</code>) |
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* @param key the encryption key |
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* @param params the algorithm parameters |
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* @param random the source of randomness |
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* |
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* @exception InvalidKeyException if the given key is inappropriate for |
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* initializing this cipher |
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* @exception InvalidAlgorithmParameterException if the given algorithm |
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* parameters are inappropriate for this cipher |
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*/ |
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protected void engineInit(int opmode, Key key, |
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AlgorithmParameterSpec params, |
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SecureRandom random) |
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throws InvalidKeyException, InvalidAlgorithmParameterException { |
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core.init(opmode, key, params, random); |
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} |
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protected void engineInit(int opmode, Key key, |
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AlgorithmParameters params, |
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SecureRandom random) |
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throws InvalidKeyException, InvalidAlgorithmParameterException { |
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core.init(opmode, key, params, random); |
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} |
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/** |
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* Continues a multiple-part encryption or decryption operation |
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* (depending on how this cipher was initialized), processing another data |
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* part. |
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* |
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* <p>The first <code>inputLen</code> bytes in the <code>input</code> |
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* buffer, starting at <code>inputOffset</code>, are processed, and the |
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* result is stored in a new buffer. |
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* |
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* @param input the input buffer |
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* @param inputOffset the offset in <code>input</code> where the input |
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* starts |
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* @param inputLen the input length |
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* |
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* @return the new buffer with the result |
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* |
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*/ |
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protected byte[] engineUpdate(byte[] input, int inputOffset, int inputLen) |
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{ |
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return core.update(input, inputOffset, inputLen); |
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} |
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||
253 |
/** |
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* Continues a multiple-part encryption or decryption operation |
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* (depending on how this cipher was initialized), processing another data |
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* part. |
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* |
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* <p>The first <code>inputLen</code> bytes in the <code>input</code> |
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* buffer, starting at <code>inputOffset</code>, are processed, and the |
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* result is stored in the <code>output</code> buffer, starting at |
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* <code>outputOffset</code>. |
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* |
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* @param input the input buffer |
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* @param inputOffset the offset in <code>input</code> where the input |
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* starts |
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* @param inputLen the input length |
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* @param output the buffer for the result |
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* @param outputOffset the offset in <code>output</code> where the result |
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* is stored |
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* |
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* @return the number of bytes stored in <code>output</code> |
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* |
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* @exception ShortBufferException if the given output buffer is too small |
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* to hold the result |
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*/ |
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protected int engineUpdate(byte[] input, int inputOffset, int inputLen, |
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byte[] output, int outputOffset) |
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throws ShortBufferException |
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{ |
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return core.update(input, inputOffset, inputLen, |
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output, outputOffset); |
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} |
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/** |
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* Encrypts or decrypts data in a single-part operation, |
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* or finishes a multiple-part operation. |
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* The data is encrypted or decrypted, depending on how this cipher was |
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* initialized. |
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* |
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290 |
* <p>The first <code>inputLen</code> bytes in the <code>input</code> |
|
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* buffer, starting at <code>inputOffset</code>, and any input bytes that |
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292 |
* may have been buffered during a previous <code>update</code> operation, |
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293 |
* are processed, with padding (if requested) being applied. |
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294 |
* The result is stored in a new buffer. |
|
295 |
* |
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296 |
* <p>The cipher is reset to its initial state (uninitialized) after this |
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297 |
* call. |
|
298 |
* |
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299 |
* @param input the input buffer |
|
300 |
* @param inputOffset the offset in <code>input</code> where the input |
|
301 |
* starts |
|
302 |
* @param inputLen the input length |
|
303 |
* |
|
304 |
* @return the new buffer with the result |
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305 |
* |
|
306 |
* @exception IllegalBlockSizeException if this cipher is a block cipher, |
|
307 |
* no padding has been requested (only in encryption mode), and the total |
|
308 |
* input length of the data processed by this cipher is not a multiple of |
|
309 |
* block size |
|
21278 | 310 |
* @exception BadPaddingException if decrypting and padding is chosen, |
2 | 311 |
* but the last input data does not have proper padding bytes. |
312 |
*/ |
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313 |
protected byte[] engineDoFinal(byte[] input, int inputOffset, int inputLen) |
|
314 |
throws IllegalBlockSizeException, BadPaddingException |
|
315 |
{ |
|
316 |
return core.doFinal(input, inputOffset, inputLen); |
|
317 |
} |
|
318 |
||
319 |
/** |
|
320 |
* Encrypts or decrypts data in a single-part operation, |
|
321 |
* or finishes a multiple-part operation. |
|
322 |
* The data is encrypted or decrypted, depending on how this cipher was |
|
323 |
* initialized. |
|
324 |
* |
|
325 |
* <p>The first <code>inputLen</code> bytes in the <code>input</code> |
|
326 |
* buffer, starting at <code>inputOffset</code>, and any input bytes that |
|
327 |
* may have been buffered during a previous <code>update</code> operation, |
|
328 |
* are processed, with padding (if requested) being applied. |
|
329 |
* The result is stored in the <code>output</code> buffer, starting at |
|
330 |
* <code>outputOffset</code>. |
|
331 |
* |
|
332 |
* <p>The cipher is reset to its initial state (uninitialized) after this |
|
333 |
* call. |
|
334 |
* |
|
335 |
* @param input the input buffer |
|
336 |
* @param inputOffset the offset in <code>input</code> where the input |
|
337 |
* starts |
|
338 |
* @param inputLen the input length |
|
339 |
* @param output the buffer for the result |
|
340 |
* @param outputOffset the offset in <code>output</code> where the result |
|
341 |
* is stored |
|
342 |
* |
|
343 |
* @return the number of bytes stored in <code>output</code> |
|
344 |
* |
|
345 |
* @exception IllegalBlockSizeException if this cipher is a block cipher, |
|
346 |
* no padding has been requested (only in encryption mode), and the total |
|
347 |
* input length of the data processed by this cipher is not a multiple of |
|
348 |
* block size |
|
349 |
* @exception ShortBufferException if the given output buffer is too small |
|
350 |
* to hold the result |
|
21278 | 351 |
* @exception BadPaddingException if decrypting and padding is chosen, |
2 | 352 |
* but the last input data does not have proper padding bytes. |
353 |
*/ |
|
354 |
protected int engineDoFinal(byte[] input, int inputOffset, int inputLen, |
|
355 |
byte[] output, int outputOffset) |
|
356 |
throws ShortBufferException, IllegalBlockSizeException, |
|
357 |
BadPaddingException |
|
358 |
{ |
|
359 |
return core.doFinal(input, inputOffset, inputLen, |
|
360 |
output, outputOffset); |
|
361 |
} |
|
362 |
||
363 |
/** |
|
364 |
* Returns the key size of the given key object. |
|
365 |
* |
|
366 |
* @param key the key object. |
|
367 |
* |
|
368 |
* @return the key size of the given key object. |
|
369 |
* |
|
370 |
* @exception InvalidKeyException if <code>key</code> is invalid. |
|
371 |
*/ |
|
372 |
protected int engineGetKeySize(Key key) throws InvalidKeyException { |
|
373 |
// Always returns 56 since the encryption key |
|
374 |
// is a DES key. |
|
375 |
return 56; |
|
376 |
} |
|
377 |
||
378 |
/** |
|
379 |
* Wrap a key. |
|
380 |
* |
|
381 |
* @param key the key to be wrapped. |
|
382 |
* |
|
383 |
* @return the wrapped key. |
|
384 |
* |
|
385 |
* @exception IllegalBlockSizeException if this cipher is a block |
|
386 |
* cipher, no padding has been requested, and the length of the |
|
387 |
* encoding of the key to be wrapped is not a |
|
388 |
* multiple of the block size. |
|
389 |
* |
|
390 |
* @exception InvalidKeyException if it is impossible or unsafe to |
|
391 |
* wrap the key with this cipher (e.g., a hardware protected key is |
|
392 |
* being passed to a software only cipher). |
|
393 |
*/ |
|
394 |
protected byte[] engineWrap(Key key) |
|
395 |
throws IllegalBlockSizeException, InvalidKeyException { |
|
396 |
return core.wrap(key); |
|
397 |
} |
|
398 |
||
399 |
/** |
|
400 |
* Unwrap a previously wrapped key. |
|
401 |
* |
|
402 |
* @param wrappedKey the key to be unwrapped. |
|
403 |
* |
|
404 |
* @param wrappedKeyAlgorithm the algorithm the wrapped key is for. |
|
405 |
* |
|
406 |
* @param wrappedKeyType the type of the wrapped key. |
|
407 |
* This is one of <code>Cipher.SECRET_KEY</code>, |
|
408 |
* <code>Cipher.PRIVATE_KEY</code>, or <code>Cipher.PUBLIC_KEY</code>. |
|
409 |
* |
|
410 |
* @return the unwrapped key. |
|
411 |
* |
|
412 |
* @exception NoSuchAlgorithmException if no installed providers |
|
413 |
* can create keys of type <code>wrappedKeyType</code> for the |
|
414 |
* <code>wrappedKeyAlgorithm</code>. |
|
415 |
* |
|
416 |
* @exception InvalidKeyException if <code>wrappedKey</code> does not |
|
417 |
* represent a wrapped key of type <code>wrappedKeyType</code> for |
|
418 |
* the <code>wrappedKeyAlgorithm</code>. |
|
419 |
*/ |
|
420 |
protected Key engineUnwrap(byte[] wrappedKey, |
|
421 |
String wrappedKeyAlgorithm, |
|
422 |
int wrappedKeyType) |
|
423 |
throws InvalidKeyException, NoSuchAlgorithmException { |
|
424 |
byte[] encodedKey; |
|
425 |
||
426 |
return core.unwrap(wrappedKey, wrappedKeyAlgorithm, |
|
427 |
wrappedKeyType); |
|
428 |
} |
|
429 |
} |