From 554fd8c5195424bdbcabf5de30fdc183aba391bd Mon Sep 17 00:00:00 2001 From: upstream source tree Date: Sun, 15 Mar 2015 20:14:05 -0400 Subject: obtained gcc-4.6.4.tar.bz2 from upstream website; verified gcc-4.6.4.tar.bz2.sig; imported gcc-4.6.4 source tree from verified upstream tarball. downloading a git-generated archive based on the 'upstream' tag should provide you with a source tree that is binary identical to the one extracted from the above tarball. if you have obtained the source via the command 'git clone', however, do note that line-endings of files in your working directory might differ from line-endings of the respective files in the upstream repository. --- libjava/classpath/gnu/javax/crypto/mac/IMac.java | 181 +++++++++++++++++++++++ 1 file changed, 181 insertions(+) create mode 100644 libjava/classpath/gnu/javax/crypto/mac/IMac.java (limited to 'libjava/classpath/gnu/javax/crypto/mac/IMac.java') diff --git a/libjava/classpath/gnu/javax/crypto/mac/IMac.java b/libjava/classpath/gnu/javax/crypto/mac/IMac.java new file mode 100644 index 000000000..a9582564d --- /dev/null +++ b/libjava/classpath/gnu/javax/crypto/mac/IMac.java @@ -0,0 +1,181 @@ +/* IMac.java -- + Copyright (C) 2001, 2002, 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. */ + + +package gnu.javax.crypto.mac; + +import java.security.InvalidKeyException; +import java.util.Map; + +/** + * The basic visible methods of any MAC (Message Authentication Code) algorithm. + *

+ * A MAC provides a way to check the integrity of information + * transmitted over, or stored in, an unreliable medium, based on a secret key. + * Typically, MACs are used between two parties, that share a common + * secret key, in order to validate information transmitted between them. + *

+ * When a MAC algorithm is based on a cryptographic hash function, it is + * then called to a HMAC (Hashed Message Authentication Code) --see RFC-2104. + *

+ * Another type of MAC algorithms exist: UMAC or Universal Message + * Authentication Code, described in + * draft-krovetz-umac-01.txt. + *

+ * With UMACs, the sender and receiver share a common secret key (the + * MAC key) which determines: + *

+ *

+ * References: + *

    + *
  1. RFC 2104HMAC: + * Keyed-Hashing for Message Authentication.
    + * H. Krawczyk, M. Bellare, and R. Canetti.
    2. + *
  2. + * UMAC: Message Authentication Code using Universal Hashing.
    + * T. Krovetz, J. Black, S. Halevi, A. Hevia, H. Krawczyk, and P. Rogaway.
    3. + *
+ */ +public interface IMac +{ + /** + * Property name of the user-supplied key material. The value associated to + * this property name is taken to be a byte array. + */ + String MAC_KEY_MATERIAL = "gnu.crypto.mac.key.material"; + /** + * Property name of the desired truncated output size in bytes. The value + * associated to this property name is taken to be an integer. If no value is + * specified in the attributes map at initialisation time, then all bytes of + * the underlying hash algorithm's output are emitted. + *

+ * This implementation, follows the recommendation of the RFC 2104 + * authors; specifically: + * 

+   *     We recommend that the output length t be not less than half the
+   *     length of the hash output (to match the birthday attack bound)
+   *     and not less than 80 bits (a suitable lower bound on the number
+   *     of bits that need to be predicted by an attacker).
+   *
+ */ + String TRUNCATED_SIZE = "gnu.crypto.mac.truncated.size"; + + /** + * Returns the canonical name of this algorithm. + * + * @return the canonical name of this algorithm. + */ + String name(); + + /** + * Returns the output length in bytes of this MAC algorithm. + * + * @return the output length in bytes of this MAC algorithm. + */ + int macSize(); + + /** + * Initialises the algorithm with designated attributes. Permissible names and + * values are described in the class documentation above. + * + * @param attributes a set of name-value pairs that describe the desired + * future instance behaviour. + * @exception InvalidKeyException if the key data is invalid. + * @exception IllegalStateException if the instance is already initialised. + * @see #MAC_KEY_MATERIAL + */ + void init(Map attributes) throws InvalidKeyException, IllegalStateException; + + /** + * Continues a MAC operation using the input byte. + * + * @param b the input byte to digest. + */ + void update(byte b); + + /** + * Continues a MAC operation, by filling the buffer, processing data + * in the algorithm's MAC_SIZE-bit block(s), updating the context and count, + * and buffering the remaining bytes in buffer for the next operation. + * + * @param in the input block. + * @param offset start of meaningful bytes in input block. + * @param length number of bytes, in input block, to consider. + */ + void update(byte[] in, int offset, int length); + + /** + * Completes the MAC by performing final operations such as padding + * and resetting the instance. + * + * @return the array of bytes representing the MAC value. + */ + byte[] digest(); + + /** + * Resets the algorithm instance for re-initialisation and use with other + * characteristics. This method always succeeds. + */ + void reset(); + + /** + * A basic test. Ensures that the MAC of a pre-determined message is equal to + * a known pre-computed value. + * + * @return true if the implementation passes a basic self-test. + * Returns false otherwise. + */ + boolean selfTest(); + + /** + * Returns a clone copy of this instance. + * + * @return a clone copy of this instance. + */ + Object clone() throws CloneNotSupportedException; +} -- cgit v1.2.3