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/OMAC.java | 303 +++++++++++++++++++++++ 1 file changed, 303 insertions(+) create mode 100644 libjava/classpath/gnu/javax/crypto/mac/OMAC.java (limited to 'libjava/classpath/gnu/javax/crypto/mac/OMAC.java') diff --git a/libjava/classpath/gnu/javax/crypto/mac/OMAC.java b/libjava/classpath/gnu/javax/crypto/mac/OMAC.java new file mode 100644 index 000000000..6758b314f --- /dev/null +++ b/libjava/classpath/gnu/javax/crypto/mac/OMAC.java @@ -0,0 +1,303 @@ +/* OMAC.java -- + Copyright (C) 2004, 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 gnu.java.security.Configuration; +import gnu.java.security.Registry; +import gnu.java.security.util.Util; +import gnu.javax.crypto.cipher.CipherFactory; +import gnu.javax.crypto.cipher.IBlockCipher; +import gnu.javax.crypto.mode.IMode; + +import java.security.InvalidKeyException; +import java.util.Arrays; +import java.util.HashMap; +import java.util.Map; +import java.util.logging.Logger; + +/** + * The One-Key CBC MAC, OMAC. This message authentication code is based on a + * block cipher in CBC mode. + *

+ * References: + *

    + *
  1. Tetsu Iwata and Kaoru Kurosawa, OMAC: One-Key CBC + * MAC.
    2. + *
+ */ +public class OMAC + implements IMac +{ + private static final Logger log = Logger.getLogger(OMAC.class.getName()); + private static final byte C1 = (byte) 0x87; + private static final byte C2 = 0x1b; + // Test key for OMAC-AES-128 + private static final byte[] KEY0 = + Util.toBytesFromString("2b7e151628aed2a6abf7158809cf4f3c"); + // Test MAC for zero-length input. + private static final byte[] DIGEST0 = + Util.toBytesFromString("bb1d6929e95937287fa37d129b756746"); + private static Boolean valid; + private final IBlockCipher cipher; + private final String name; + private IMode mode; + private int blockSize; + private int outputSize; + private byte[] Lu, Lu2; + private byte[] M; + private byte[] Y; + private boolean init; + private int index; + + public OMAC(IBlockCipher cipher) + { + this.cipher = cipher; + this.name = "OMAC-" + cipher.name(); + } + + public Object clone() + { + return new OMAC(cipher); + } + + public String name() + { + return name; + } + + public int macSize() + { + return outputSize; + } + + public void init(Map attrib) throws InvalidKeyException + { + HashMap attrib2 = new HashMap(); + attrib2.put(IBlockCipher.KEY_MATERIAL, attrib.get(MAC_KEY_MATERIAL)); + cipher.reset(); + cipher.init(attrib2); + blockSize = cipher.currentBlockSize(); + Integer os = (Integer) attrib.get(TRUNCATED_SIZE); + if (os != null) + { + outputSize = os.intValue(); + if (outputSize < 0 || outputSize > blockSize) + throw new IllegalArgumentException("truncated size out of range"); + } + else + outputSize = blockSize; + + byte[] L = new byte[blockSize]; + cipher.encryptBlock(L, 0, L, 0); + if (Configuration.DEBUG) + log.fine("L = " + Util.toString(L).toLowerCase()); + if (Lu != null) + { + Arrays.fill(Lu, (byte) 0); + if (Lu.length != blockSize) + Lu = new byte[blockSize]; + } + else + Lu = new byte[blockSize]; + if (Lu2 != null) + { + Arrays.fill(Lu2, (byte) 0); + if (Lu2.length != blockSize) + Lu2 = new byte[blockSize]; + } + else + Lu2 = new byte[blockSize]; + + boolean msb = (L[0] & 0x80) != 0; + for (int i = 0; i < blockSize; i++) + { + Lu[i] = (byte)(L[i] << 1 & 0xFF); + if (i + 1 < blockSize) + Lu[i] |= (byte)((L[i + 1] & 0x80) >> 7); + } + if (msb) + { + if (blockSize == 16) + Lu[Lu.length - 1] ^= C1; + else if (blockSize == 8) + Lu[Lu.length - 1] ^= C2; + else + throw new IllegalArgumentException("unsupported cipher block size: " + + blockSize); + } + if (Configuration.DEBUG) + log.fine("Lu = " + Util.toString(Lu).toLowerCase()); + msb = (Lu[0] & 0x80) != 0; + for (int i = 0; i < blockSize; i++) + { + Lu2[i] = (byte)(Lu[i] << 1 & 0xFF); + if (i + 1 < blockSize) + Lu2[i] |= (byte)((Lu[i + 1] & 0x80) >> 7); + } + if (msb) + { + if (blockSize == 16) + Lu2[Lu2.length - 1] ^= C1; + else + Lu2[Lu2.length - 1] ^= C2; + } + if (Configuration.DEBUG) + log.fine("Lu2 = " + Util.toString(Lu2).toLowerCase()); + if (M != null) + { + Arrays.fill(M, (byte) 0); + if (M.length != blockSize) + M = new byte[blockSize]; + } + else + M = new byte[blockSize]; + if (Y != null) + { + Arrays.fill(Y, (byte) 0); + if (Y.length != blockSize) + Y = new byte[blockSize]; + } + else + Y = new byte[blockSize]; + + index = 0; + init = true; + } + + public void update(byte b) + { + if (! init) + throw new IllegalStateException("not initialized"); + if (index == M.length) + { + process(); + index = 0; + } + M[index++] = b; + } + + public void update(byte[] buf, int off, int len) + { + if (! init) + throw new IllegalStateException("not initialized"); + if (off < 0 || len < 0 || off + len > buf.length) + throw new IndexOutOfBoundsException("size=" + buf.length + "; off=" + off + + "; len=" + len); + for (int i = 0; i < len;) + { + if (index == blockSize) + { + process(); + index = 0; + } + int count = Math.min(blockSize - index, len - i); + System.arraycopy(buf, off + i, M, index, count); + index += count; + i += count; + } + } + + public byte[] digest() + { + byte[] b = new byte[outputSize]; + digest(b, 0); + return b; + } + + public void digest(byte[] out, int off) + { + if (! init) + throw new IllegalStateException("not initialized"); + if (off < 0 || off + outputSize > out.length) + throw new IndexOutOfBoundsException("size=" + out.length + "; off=" + off + + "; len=" + outputSize); + byte[] T = new byte[blockSize]; + byte[] L = Lu; + if (index < blockSize) + { + M[index++] = (byte) 0x80; + while (index < blockSize) + M[index++] = 0; + L = Lu2; + } + for (int i = 0; i < blockSize; i++) + T[i] = (byte)(M[i] ^ Y[i] ^ L[i]); + cipher.encryptBlock(T, 0, T, 0); + System.arraycopy(T, 0, out, off, outputSize); + reset(); + } + + public void reset() + { + index = 0; + if (Y != null) + Arrays.fill(Y, (byte) 0); + if (M != null) + Arrays.fill(M, (byte) 0); + } + + public boolean selfTest() + { + OMAC mac = new OMAC(CipherFactory.getInstance(Registry.AES_CIPHER)); + mac.reset(); + Map attr = new HashMap(); + attr.put(MAC_KEY_MATERIAL, KEY0); + byte[] digest = null; + try + { + mac.init(attr); + digest = mac.digest(); + } + catch (Exception x) + { + return false; + } + if (digest == null) + return false; + return Arrays.equals(DIGEST0, digest); + } + + private void process() + { + for (int i = 0; i < blockSize; i++) + M[i] = (byte)(M[i] ^ Y[i]); + cipher.encryptBlock(M, 0, Y, 0); + } +} -- cgit v1.2.3