| /* IKeyWrappingAlgorithm.java -- FIXME: briefly describe file purpose |
| Copyright (C) 2006 Free Software Foundation, Inc. |
| |
| This file is 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, 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; see the file COPYING. If not, write to the |
| Free Software Foundation, Inc., 51 Franklin Street, 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. */ |
| |
| |
| package gnu.javax.crypto.kwa; |
| |
| import java.security.InvalidKeyException; |
| import java.security.SecureRandom; |
| import java.util.Map; |
| |
| import javax.crypto.ShortBufferException; |
| |
| /** |
| * Constants and visible methods available to all GNU Key Wrapping Algorithm |
| * implementations. |
| */ |
| public interface IKeyWrappingAlgorithm |
| { |
| /** |
| * Name of the property, in the attributes map, that references the Key |
| * Wrapping Algorithm KEK (Key Encryption Key) material. The object referenced |
| * by this property is a byte array containing the keying material for the |
| * underlying block cipher. |
| */ |
| String KEY_ENCRYPTION_KEY_MATERIAL = "gnu.crypto.kwa.kek"; |
| /** |
| * Name of the property, in the attributes map, that references the Initial |
| * Value (IV) material. The object referenced by this property is a byte array |
| * containing the initial integrity check register value. |
| */ |
| String INITIAL_VALUE = "gnu.crypto.kwa.iv"; |
| /** |
| * Property name of an optional {@link SecureRandom} instance to use. The |
| * default is to use a {@link gnu.java.security.util.PRNG} instance. |
| */ |
| String SOURCE_OF_RANDOMNESS = "gnu.crypto.kwa.prng"; |
| |
| /** |
| * Returns the canonical name of this Key Wrapping Algorithm. |
| * |
| * @return the canonical name of this Key Wrapping Algorithm. |
| */ |
| String name(); |
| |
| /** |
| * Initializes this instance with the designated algorithm specific |
| * attributes. |
| * |
| * @param attributes a map of name-to-value pairs the Key Wrapping Algorithm |
| * must use for its setup. |
| * @throws InvalidKeyException if an exception is encountered while seting up |
| * the Key Wrapping Algorithm keying material (KEK). |
| */ |
| void init(Map attributes) throws InvalidKeyException; |
| |
| /** |
| * Wraps the designated plain text bytes. |
| * |
| * @param in the input byte array containing the plain text. |
| * @param inOffset the offset into <code>in</code> where the first byte of |
| * the plain text (key material) to wrap is located. |
| * @param length the number of bytes to wrap. |
| * @param out the output byte array where the wrapped key material will be |
| * stored. |
| * @param outOffset the offset into <code>out</code> of the first wrapped |
| * byte. |
| * @return the number of bytes of the wrapped key material; i.e. the length, |
| * in <code>out</code>, starting from <code>outOffset</code> |
| * where the cipher text (wrapped key material) are stored. |
| * @throws ShortBufferException if the output buffer is not long enough to |
| * accomodate the number of bytes resulting from wrapping the plain |
| * text. |
| */ |
| int wrap(byte[] in, int inOffset, int length, byte[] out, int outOffset) |
| throws ShortBufferException; |
| |
| /** |
| * Wraps the designated plain text bytes. |
| * |
| * @param in the input byte array containing the plain text. |
| * @param inOffset the offset into <code>in</code> where the first byte of |
| * the plain text (key material) to wrap is located. |
| * @param length the number of bytes to wrap. |
| * @return a newly allocated byte array containing the cipher text. |
| */ |
| byte[] wrap(byte[] in, int inOffset, int length); |
| |
| /** |
| * Unwraps the designated cipher text bytes. |
| * |
| * @param in the input byte array containing the cipher text. |
| * @param inOffset the offset into <code>in</code> where the first byte of |
| * the cipher text (already wrapped key material) to unwrap is |
| * located. |
| * @param length the number of bytes to unwrap. |
| * @param out the output byte array where the unwrapped key material will be |
| * stored. |
| * @param outOffset the offset into <code>out</code> of the first unwrapped |
| * byte. |
| * @return the number of bytes of the unwrapped key material; i.e. the length, |
| * in <code>out</code>, starting from <code>outOffset</code> |
| * where the plain text (unwrapped key material) are stored. |
| * @throws ShortBufferException if the output buffer is not long enough to |
| * accomodate the number of bytes resulting from unwrapping the |
| * cipher text. |
| * @throws KeyUnwrappingException if after unwrapping the cipher text, the |
| * bytes at the begining did not match the initial value. |
| */ |
| int unwrap(byte[] in, int inOffset, int length, byte[] out, int outOffset) |
| throws ShortBufferException, KeyUnwrappingException; |
| |
| /** |
| * Unwraps the designated cipher text bytes. |
| * |
| * @param in the input byte array containing the cipher text. |
| * @param inOffset the offset into <code>in</code> where the first byte of |
| * the cipher text (already wrapped key material) to unwrap is |
| * located. |
| * @param length the number of bytes to unwrap. |
| * @return a newly allocated byte array containing the plain text. |
| * @throws KeyUnwrappingException if after unwrapping the cipher text, the |
| * bytes at the begining did not match the initial value. |
| */ |
| byte[] unwrap(byte[] in, int inOffset, int length) |
| throws KeyUnwrappingException; |
| } |