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-rw-r--r--src/Java/gtPlusPlus/api/analytics/BlockingFlush.java12
-rw-r--r--src/Java/gtPlusPlus/api/interfaces/IRandomGenerator.java55
-rw-r--r--src/Java/gtPlusPlus/api/objects/CSPRNG.java271
-rw-r--r--src/Java/gtPlusPlus/core/util/SystemUtils.java77
-rw-r--r--src/Java/gtPlusPlus/core/util/Utils.java25
-rw-r--r--src/Java/gtPlusPlus/core/util/uuid/UUIDGenerator.java451
-rw-r--r--src/Java/gtPlusPlus/core/util/uuid/UUIDUtils.java25
7 files changed, 910 insertions, 6 deletions
diff --git a/src/Java/gtPlusPlus/api/analytics/BlockingFlush.java b/src/Java/gtPlusPlus/api/analytics/BlockingFlush.java
index 7dbf9cba06..cff4c84cce 100644
--- a/src/Java/gtPlusPlus/api/analytics/BlockingFlush.java
+++ b/src/Java/gtPlusPlus/api/analytics/BlockingFlush.java
@@ -14,16 +14,16 @@ import java.util.concurrent.Phaser;
* able to block until they're uploaded.
*
* <pre><code>
- * BlockingFlush blockingFlush = BlockingFlush.create();
- * Analytics analytics = Analytics.builder(writeKey)
- * .plugin(blockingFlush)
+ * BlockingFlush mBlockingFlush = BlockingFlush.create();
+ * Analytics mAnalytics = Analytics.builder(writeKey)
+ * .plugin(mBlockingFlush)
* .build();
*
* // Do some work.
*
- * analytics.flush(); // Trigger a flush.
- * blockingFlush.block(); // Block until the flush completes.
- * analytics.shutdown(); // Shut down after the flush is complete.
+ * mAnalytics.flush(); // Trigger a flush.
+ * mBlockingFlush.block(); // Block until the flush completes.
+ * mAnalytics.shutdown(); // Shut down after the flush is complete.
* </code></pre>
*/
public class BlockingFlush {
diff --git a/src/Java/gtPlusPlus/api/interfaces/IRandomGenerator.java b/src/Java/gtPlusPlus/api/interfaces/IRandomGenerator.java
new file mode 100644
index 0000000000..233fb93d4d
--- /dev/null
+++ b/src/Java/gtPlusPlus/api/interfaces/IRandomGenerator.java
@@ -0,0 +1,55 @@
+/*
+ * Copyright 2005, Nick Galbreath -- nickg [at] modp [dot] com
+ * All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions are
+ * met:
+ *
+ * Redistributions of source code must retain the above copyright
+ * notice, this list of conditions and the following disclaimer.
+ *
+ * Redistributions in binary form must reproduce the above copyright
+ * notice, this list of conditions and the following disclaimer in the
+ * documentation and/or other materials provided with the distribution.
+ *
+ * Neither the name of the modp.com nor the names of its
+ * contributors may be used to endorse or promote products derived from
+ * this software without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+ * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+ * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
+ * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
+ * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
+ * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
+ * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+ * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+ * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+ * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+ * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+ *
+ * This is the standard "new" BSD license:
+ * http://www.opensource.org/licenses/bsd-license.php
+ */
+
+package gtPlusPlus.api.interfaces;
+
+/**
+ * Simplified interface for random number generation
+ *
+ * @author Nick Galbreath -- nickg [at] modp [dot] com
+ * @version 1 -- 06-Jul-2005
+ */
+public interface IRandomGenerator {
+
+ /**
+ * Returns N random bits
+ *
+ * See also java.util.Random#next
+ * @param numBits
+ * @return and int with the LSB being random
+ */
+ public int next(int numBits);
+
+}
diff --git a/src/Java/gtPlusPlus/api/objects/CSPRNG.java b/src/Java/gtPlusPlus/api/objects/CSPRNG.java
new file mode 100644
index 0000000000..6b78eaccfc
--- /dev/null
+++ b/src/Java/gtPlusPlus/api/objects/CSPRNG.java
@@ -0,0 +1,271 @@
+/*
+ * Copyright 2005, Nick Galbreath -- nickg [at] modp [dot] com
+ * All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions are
+ * met:
+ *
+ * Redistributions of source code must retain the above copyright
+ * notice, this list of conditions and the following disclaimer.
+ *
+ * Redistributions in binary form must reproduce the above copyright
+ * notice, this list of conditions and the following disclaimer in the
+ * documentation and/or other materials provided with the distribution.
+ *
+ * Neither the name of the modp.com nor the names of its
+ * contributors may be used to endorse or promote products derived from
+ * this software without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+ * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+ * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
+ * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
+ * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
+ * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
+ * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+ * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+ * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+ * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+ * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+ *
+ * This is the standard "new" BSD license:
+ * http://www.opensource.org/licenses/bsd-license.php
+ */
+
+package gtPlusPlus.api.objects;
+import java.util.Random;
+
+import gtPlusPlus.api.interfaces.IRandomGenerator;
+import gtPlusPlus.core.util.Utils;
+
+import java.security.SecureRandom;
+import java.math.BigInteger;
+
+/**
+ * The Blum-Blum-Shub random number generator.
+ *
+ * <p>
+ * The Blum-Blum-Shub is a "cryptographically secure" random number
+ * generator. It has been proven that predicting the ouput
+ * is equivalent to factoring <i>n</i>, a large integer generated
+ * from two prime numbers.
+ * </p>
+ *
+ * <p>
+ * The Algorithm:
+ * </p>
+ * <ol>
+ * <li>
+ * (setup) generate two secret prime numbers <i>p</i>, <i>q</i> such that
+ * <i>p</i> &ne; <i>q</i>, <i>p</i> &equiv; 3 mod 4, <i>q</i> &equiv; 3 mod 4.
+ * </li>
+ * <li> (setup) compute <i>n</i> = <i>pq</i>. <i>n</i> can be re-used, but
+ * <i>p</i>, and <i>q</i> are secret and should be disposed of.</li>
+ * <li> Generate a (secure) random seed <i>s</i> in the range [1, <i>n</i> -1]
+ * such that gcd(<i>s</i>, <i>n</i>) = 1.
+ * <li> Compute <i>x</i> = <i>s</i><sup>2</sup> mod <i>n</i></li>
+ * <li> Compute a single random bit with:
+ * <ol>
+ * <li> <i>x</i> = <i>x</i><sup>2</sup> mod <i>n</i></li>
+ * <li> return Least-Significant-Bit(<i>x</i>) (i.e. <i>x</i> & 1)</li>
+ * </ol>
+ * Repeat as necessary.
+ * </li>
+ * </ol>
+ *
+ * <p>
+ * The code originally appeared in <a href="http://modp.com/cida/"><i>Cryptography for
+ * Internet and Database Applications </i>, Chapter 4, pages 174-177</a>
+ * </p>
+ * <p>
+ * More details are in the <a href="http://www.cacr.math.uwaterloo.ca/hac/"><i>Handbook of Applied Cryptography</i></a>,
+ * <a href="http://www.cacr.math.uwaterloo.ca/hac/about/chap5.pdf">Section 5.5.2</a>
+ * </p>
+ *
+ * @author Nick Galbreath -- nickg [at] modp [dot] com
+ * @version 3 -- 06-Jul-2005
+ *
+ */
+public class CSPRNG extends Random implements IRandomGenerator {
+
+ // pre-compute a few values
+ private static final BigInteger two = BigInteger.valueOf(2L);
+
+ private static final BigInteger three = BigInteger.valueOf(3L);
+
+ private static final BigInteger four = BigInteger.valueOf(4L);
+
+ /**
+ * main parameter
+ */
+ private BigInteger n;
+
+ private BigInteger state;
+
+ /**
+ * Generate appropriate prime number for use in Blum-Blum-Shub.
+ *
+ * This generates the appropriate primes (p = 3 mod 4) needed to compute the
+ * "n-value" for Blum-Blum-Shub.
+ *
+ * @param bits Number of bits in prime
+ * @param rand A source of randomness
+ */
+ private static BigInteger getPrime(int bits, Random rand) {
+ BigInteger p;
+ while (true) {
+ p = new BigInteger(bits, 100, rand);
+ if (p.mod(four).equals(three))
+ break;
+ }
+ return p;
+ }
+
+ /**
+ * This generates the "n value" -- the multiplication of two equally sized
+ * random prime numbers -- for use in the Blum-Blum-Shub algorithm.
+ *
+ * @param bits
+ * The number of bits of security
+ * @param rand
+ * A random instance to aid in generating primes
+ * @return A BigInteger, the <i>n</i>.
+ */
+ public static BigInteger generateN(int bits, Random rand) {
+ BigInteger p = getPrime(bits/2, rand);
+ BigInteger q = getPrime(bits/2, rand);
+
+ // make sure p != q (almost always true, but just in case, check)
+ while (p.equals(q)) {
+ q = getPrime(bits, rand);
+ }
+ return p.multiply(q);
+ }
+
+ /**
+ * Constructor, specifing bits for <i>n</i>
+ *
+ * @param bits number of bits
+ */
+ public CSPRNG(int bits) {
+ this(bits, new Random());
+ }
+
+ /**
+ * Constructor, generates prime and seed
+ *
+ * @param bits
+ * @param rand
+ */
+ public CSPRNG(int bits, Random rand) {
+ this(generateN(bits, rand));
+ }
+
+ /**
+ * A constructor to specify the "n-value" to the Blum-Blum-Shub algorithm.
+ * The inital seed is computed using Java's internal "true" random number
+ * generator.
+ *
+ * @param n
+ * The n-value.
+ */
+ public CSPRNG(BigInteger n) {
+ this(n, SecureRandom.getSeed(n.bitLength() / 8));
+ }
+
+ /**
+ * A constructor to specify both the n-value and the seed to the
+ * Blum-Blum-Shub algorithm.
+ *
+ * @param n
+ * The n-value using a BigInteger
+ * @param seed
+ * The seed value using a byte[] array.
+ */
+ public CSPRNG(BigInteger n, byte[] seed) {
+ this.n = n;
+ setSeed(seed);
+ }
+
+ /**
+ * Sets or resets the seed value and internal state
+ *
+ * @param seedBytes
+ * The new seed.
+ */
+ public void setSeed(byte[] seedBytes) {
+ // ADD: use hardwired default for n
+ BigInteger seed = new BigInteger(1, seedBytes);
+ state = seed.mod(n);
+ }
+
+ /**
+ * Returns up to numBit random bits
+ *
+ * @return int
+ */
+ public int next(int numBits) {
+ // TODO: find out how many LSB one can extract per cycle.
+ // it is more than one.
+ int result = 0;
+ for (int i = numBits; i != 0; --i) {
+ state = state.modPow(two, n);
+ result = (result << 1) | (state.testBit(0) == true ? 1 : 0);
+ }
+ return result;
+ }
+
+
+ public static CSPRNG generate(){
+ return generate(512);
+ }
+
+ /**
+ * @return CSPRNG
+ * @Author Draknyte1/Alkalus
+ */
+ public static CSPRNG generate(int bitsize){
+ // First use the internal, stock "true" random number
+ // generator to get a "true random seed"
+ SecureRandom r = Utils.generateSecureRandom();
+ r.nextInt(); // need to do something for SR to be triggered.
+ // Use this seed to generate a n-value for Blum-Blum-Shub
+ // This value can be re-used if desired.
+ BigInteger nval = CSPRNG.generateN(bitsize, r);
+ // now get a seed
+ byte[] seed = new byte[bitsize/8];
+ r.nextBytes(seed);
+ // now create an instance of BlumBlumShub
+ CSPRNG bbs = new CSPRNG(nval, seed);
+ return bbs;
+ }
+
+
+ /**
+ * @return CSPRNG
+ * @Author Draknyte1/Alkalus
+ */
+ public static CSPRNG generate(Random aRandom){
+ return generate(512, aRandom);
+ }
+
+ /**
+ * @return CSPRNG
+ * @Author Draknyte1/Alkalus
+ */
+ public static CSPRNG generate(int aBitSize, Random aRandom){
+ // First use the internal, stock "true" random number
+ // generator to get a "true random seed"
+ SecureRandom r = Utils.generateSecureRandom();
+ r.nextInt(); // need to do something for SR to be triggered.
+ // Use this seed to generate a n-value for Blum-Blum-Shub
+ // This value can be re-used if desired.
+ int bitsize = aBitSize;
+ // now create an instance of BlumBlumShub
+ // do everything almost automatically
+ CSPRNG bbs = new CSPRNG(bitsize, aRandom);
+ return bbs;
+ }
+
+}
diff --git a/src/Java/gtPlusPlus/core/util/SystemUtils.java b/src/Java/gtPlusPlus/core/util/SystemUtils.java
new file mode 100644
index 0000000000..45fc25caf6
--- /dev/null
+++ b/src/Java/gtPlusPlus/core/util/SystemUtils.java
@@ -0,0 +1,77 @@
+package gtPlusPlus.core.util;
+
+public class SystemUtils {
+
+ private static OS SystemType;
+
+ public static OS getOS(){
+ if (SystemType != null){
+ return SystemType;
+ }
+ else {
+ SystemType = getOperatingSystem();
+ return SystemType;
+ }
+ }
+
+ public static boolean isWindows() {
+ return (getOSString().indexOf("win") >= 0);
+ }
+
+ public static boolean isMac() {
+ return (getOSString().indexOf("mac") >= 0);
+ }
+
+ public static boolean isUnix() {
+ return (getOSString().indexOf("nix") >= 0 || getOSString().indexOf("nux") >= 0 || getOSString().indexOf("aix") > 0 );
+ }
+
+ public static boolean isSolaris() {
+ return (getOSString().indexOf("sunos") >= 0);
+ }
+
+ public static String getOSString(){
+ try {
+ return System.getProperty("os.name").toLowerCase();
+ }
+ catch (Throwable t){
+ return "other";
+ }
+ }
+
+ public static OS getOperatingSystem(){
+ if (isMac()){
+ return OS.MAC;
+ }
+ else if (isWindows()){
+ return OS.WINDOWS;
+ }
+ else if (isUnix()){
+ return OS.UNIX;
+ }
+ else if (isSolaris()){
+ return OS.SOLARIS;
+ }
+ else {
+ return OS.OTHER;
+ }
+ }
+
+ public static enum OS {
+ MAC(1),
+ WINDOWS(2),
+ UNIX(3),
+ SOLARIS(4),
+ OTHER(0);
+
+ private int mID;
+ private OS (final int ID){
+ this.mID = ID;
+ }
+
+ public int getID() {
+ return this.mID;
+ }
+ }
+
+}
diff --git a/src/Java/gtPlusPlus/core/util/Utils.java b/src/Java/gtPlusPlus/core/util/Utils.java
index 05c038f835..e9e7506cee 100644
--- a/src/Java/gtPlusPlus/core/util/Utils.java
+++ b/src/Java/gtPlusPlus/core/util/Utils.java
@@ -5,6 +5,8 @@ import java.awt.Graphics;
import java.io.File;
import java.lang.reflect.Field;
import java.lang.reflect.Method;
+import java.security.NoSuchAlgorithmException;
+import java.security.SecureRandom;
import java.util.ArrayList;
import java.util.Arrays;
import java.util.HashMap;
@@ -862,5 +864,28 @@ public class Utils {
Pair<Integer, Integer> ver = getGregtechVersion();
return ver.getValue();
}
+
+ public static SecureRandom generateSecureRandom(){
+ SecureRandom secRan;
+ String secRanType;
+
+ if (SystemUtils.isWindows()){
+ secRanType = "Windows-PRNG";
+ }
+ else {
+ secRanType = "NativePRNG";
+ }
+ try {
+ secRan = SecureRandom.getInstance(secRanType);
+ // Default constructor would have returned insecure SHA1PRNG algorithm, so make an explicit call.
+ byte[] b = new byte[64] ;
+ secRan.nextBytes(b);
+ return secRan;
+ }
+ catch (NoSuchAlgorithmException e) {
+ return null;
+ }
+ }
+
}
diff --git a/src/Java/gtPlusPlus/core/util/uuid/UUIDGenerator.java b/src/Java/gtPlusPlus/core/util/uuid/UUIDGenerator.java
new file mode 100644
index 0000000000..b6aa6ae6db
--- /dev/null
+++ b/src/Java/gtPlusPlus/core/util/uuid/UUIDGenerator.java
@@ -0,0 +1,451 @@
+package gtPlusPlus.core.util.uuid;
+
+import java.io.IOException;
+import java.net.InetAddress;
+import java.util.Random;
+import java.util.UUID;
+
+import gtPlusPlus.api.objects.CSPRNG;
+
+/**
+ *
+ * Implement modified version of Apache's OpenJPA UUID generator.
+ * This UUID generator is paired with a Blum-Blum-Shub random number generator
+ * which in itself is seeded by custom SecureRandom.
+ *
+ * The UUID generator class has been converted from a static factory to an instanced factory.
+ *
+ */
+
+//========================================= APACHE BLOCK =========================================
+
+/*
+ * Licensed to the Apache Software Foundation (ASF) under one
+ * or more contributor license agreements. See the NOTICE file
+ * distributed with this work for additional information
+ * regarding copyright ownership. The ASF licenses this file
+ * to you under the Apache License, Version 2.0 (the
+ * "License"); you may not use this file except in compliance
+ * with the License. You may obtain a copy of the License at
+ *
+ * http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing,
+ * software distributed under the License is distributed on an
+ * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
+ * KIND, either express or implied. See the License for the
+ * specific language governing permissions and limitations
+ * under the License.
+ */
+
+/**
+ * UUID value generator. Type 1 generator is based on the time-based generator
+ * in the Apache Commons Id project: http://jakarta.apache.org/commons/sandbox
+ * /id/uuid.html The type 4 generator uses the standard Java UUID generator.
+ *
+ * The type 1 code has been vastly simplified and modified to replace the
+ * ethernet address of the host machine with the IP, since we do not want to
+ * require native libs and Java cannot access the MAC address directly.
+ *
+ * In spirit, implements the IETF UUID draft specification, found here:<br />
+ * http://www1.ics.uci.edu/~ejw/authoring/uuid-guid/draft-leach-uuids-guids-01
+ * .txt
+ *
+ * @author Abe White, Kevin Sutter
+ * @since 0.3.3
+ */
+public class UUIDGenerator {
+
+ // supported UUID types
+ public static final int TYPE1 = 1;
+ public static final int TYPE4 = 4;
+ // indexes within the uuid array for certain boundaries
+ private static final byte IDX_TIME_HI = 6;
+ private static final byte IDX_TYPE = 6; // multiplexed
+ private static final byte IDX_TIME_MID = 4;
+ private static final byte IDX_TIME_LO = 0;
+ private static final byte IDX_TIME_SEQ = 8;
+ private static final byte IDX_VARIATION = 8; // multiplexed
+ // indexes and lengths within the timestamp for certain boundaries
+ private static final byte TS_TIME_LO_IDX = 4;
+ private static final byte TS_TIME_LO_LEN = 4;
+ private static final byte TS_TIME_MID_IDX = 2;
+ private static final byte TS_TIME_MID_LEN = 2;
+ private static final byte TS_TIME_HI_IDX = 0;
+ private static final byte TS_TIME_HI_LEN = 2;
+ // offset to move from 1/1/1970, which is 0-time for Java, to gregorian
+ // 0-time 10/15/1582, and multiplier to go from 100nsec to msec units
+ private static final long GREG_OFFSET = 0xB1D069B5400L;
+ private static final long MILLI_MULT = 10000L;
+ // type of UUID -- time based
+ private final static byte TYPE_TIME_BASED = 0x10;
+ // random number generator used to reduce conflicts with other JVMs, and
+ // hasher for strings.
+ private Random RANDOM;
+ // 4-byte IP address + 2 random bytes to compensate for the fact that
+ // the MAC address is usually 6 bytes
+ private byte[] IP;
+ // counter is initialized to 0 and is incremented for each uuid request
+ // within the same timestamp window.
+ private int _counter;
+ // current timestamp (used to detect multiple uuid requests within same
+ // timestamp)
+ private long _currentMillis;
+ // last used millis time, and a semi-random sequence that gets reset
+ // when it overflows
+ private long _lastMillis = 0L;
+ private static final int MAX_14BIT = 0x3FFF;
+ private short _seq = 0;
+ private boolean type1Initialized = false; /*
+ * Initializer for type 1 UUIDs. Creates random generator and genenerates
+ * the node portion of the UUID using the IP address.
+ */
+ private synchronized void initializeForType1() {
+ if (type1Initialized == true) {
+ return;
+ }
+ // note that secure random is very slow the first time
+ // it is used; consider switching to a standard random
+ RANDOM = CSPRNG.generate();
+ _seq = (short) RANDOM.nextInt(MAX_14BIT);
+
+ byte[] ip = null;
+ try {
+ ip = InetAddress.getLocalHost().getAddress();
+ } catch (IOException ioe) {
+ throw new RuntimeException(ioe);
+ }
+ IP = new byte[6];
+ RANDOM.nextBytes(IP);
+ //OPENJPA-2055: account for the fact that 'getAddress'
+ //may return an IPv6 address which is 16 bytes wide.
+ for( int i = 0 ; i < ip.length; ++i ) {
+ IP[2+(i%4)] ^= ip[i];
+ }
+ type1Initialized = true;
+ }
+ /**
+ * Return a unique UUID value.
+ */
+ public byte[] next(int type) {
+ if (type == TYPE4) {
+ return createType4();
+ }
+ return createType1();
+ }
+ /*
+ * Creates a type 1 UUID
+ */
+ public byte[] createType1() {
+ if (type1Initialized == false) {
+ initializeForType1();
+ }
+ // set ip addr
+ byte[] uuid = new byte[16];
+ System.arraycopy(IP, 0, uuid, 10, IP.length);
+ // Set time info. Have to do this processing within a synchronized
+ // block because of the statics...
+ long now = 0;
+ synchronized (UUIDGenerator.class) {
+ // Get the time to use for this uuid. This method has the side
+ // effect of modifying the clock sequence, as well.
+ now = getTime();
+ // Insert the resulting clock sequence into the uuid
+ uuid[IDX_TIME_SEQ] = (byte) ((_seq & 0x3F00) >>> 8);
+ uuid[IDX_VARIATION] |= 0x80;
+ uuid[IDX_TIME_SEQ+1] = (byte) (_seq & 0xFF);
+ }
+ // have to break up time because bytes are spread through uuid
+ byte[] timeBytes = Bytes.toBytes(now);
+ // Copy time low
+ System.arraycopy(timeBytes, TS_TIME_LO_IDX, uuid, IDX_TIME_LO,
+ TS_TIME_LO_LEN);
+ // Copy time mid
+ System.arraycopy(timeBytes, TS_TIME_MID_IDX, uuid, IDX_TIME_MID,
+ TS_TIME_MID_LEN);
+ // Copy time hi
+ System.arraycopy(timeBytes, TS_TIME_HI_IDX, uuid, IDX_TIME_HI,
+ TS_TIME_HI_LEN);
+ //Set version (time-based)
+ uuid[IDX_TYPE] |= TYPE_TIME_BASED; // 0001 0000
+ return uuid;
+ }
+ /*
+ * Creates a type 4 UUID
+ */
+ private byte[] createType4() {
+ UUID type4 = UUID.randomUUID();
+ byte[] uuid = new byte[16];
+ longToBytes(type4.getMostSignificantBits(), uuid, 0);
+ longToBytes(type4.getLeastSignificantBits(), uuid, 8);
+ return uuid;
+ }
+ /*
+ * Converts a long to byte values, setting them in a byte array
+ * at a given starting position.
+ */
+ private void longToBytes(long longVal, byte[] buf, int sPos) {
+ sPos += 7;
+ for(int i = 0; i < 8; i++)
+ buf[sPos-i] = (byte)(longVal >>> (i * 8));
+ }
+
+ /**
+ * Return the next unique uuid value as a 16-character string.
+ */
+ public String nextString(int type) {
+ byte[] bytes = next(type);
+ try {
+ return new String(bytes, "ISO-8859-1");
+ } catch (Exception e) {
+ return new String(bytes);
+ }
+ }
+ /**
+ * Return the next unique uuid value as a 32-character hex string.
+ */
+ public String nextHex(int type) {
+ return Base16Encoder.encode(next(type));
+ }
+ /**
+ * Get the timestamp to be used for this uuid. Must be called from
+ * a synchronized block.
+ *
+ * @return long timestamp
+ */
+ // package-visibility for testing
+ private long getTime() {
+ if (RANDOM == null)
+ initializeForType1();
+ long newTime = getUUIDTime();
+ if (newTime <= _lastMillis) {
+ incrementSequence();
+ newTime = getUUIDTime();
+ }
+ _lastMillis = newTime;
+ return newTime;
+ }
+ /**
+ * Gets the appropriately modified timestamep for the UUID. Must be called
+ * from a synchronized block.
+ *
+ * @return long timestamp in 100ns intervals since the Gregorian change
+ * offset
+ */
+ private long getUUIDTime() {
+ if (_currentMillis != System.currentTimeMillis()) {
+ _currentMillis = System.currentTimeMillis();
+ _counter = 0; // reset counter
+ }
+ // check to see if we have created too many uuid's for this timestamp
+ if (_counter + 1 >= MILLI_MULT) {
+ // Original algorithm threw exception. Seemed like overkill.
+ // Let's just increment the timestamp instead and start over...
+ _currentMillis++;
+ _counter = 0;
+ }
+ // calculate time as current millis plus offset times 100 ns ticks
+ long currentTime = (_currentMillis + GREG_OFFSET) * MILLI_MULT;
+ // return the uuid time plus the artificial tick counter incremented
+ return currentTime + _counter++;
+ }
+ /**
+ * Increments the clock sequence for this uuid. Must be called from a
+ * synchronized block.
+ */
+ private void incrementSequence() {
+ // increment, but if it's greater than its 14-bits, reset it
+ if (++_seq > MAX_14BIT) {
+ _seq = (short) RANDOM.nextInt(MAX_14BIT); // semi-random
+ }
+ }
+
+ //Add Dependant classes internally
+
+ /**
+ * This class came from the Apache Commons Id sandbox project in support
+ * of the UUIDGenerator implementation.
+ *
+ * <p>Static methods for managing byte arrays (all methods follow Big
+ * Endian order where most significant bits are in front).</p>
+ */
+ public static final class Bytes {
+ /**
+ * <p>Hide constructor in utility class.</p>
+ */
+ private Bytes() {
+ }
+ /**
+ * Appends two bytes array into one.
+ *
+ * @param a A byte[].
+ * @param b A byte[].
+ * @return A byte[].
+ */
+ public static byte[] append(byte[] a, byte[] b) {
+ byte[] z = new byte[a.length + b.length];
+ System.arraycopy(a, 0, z, 0, a.length);
+ System.arraycopy(b, 0, z, a.length, b.length);
+ return z;
+ }
+ /**
+ * Returns a 8-byte array built from a long.
+ *
+ * @param n The number to convert.
+ * @return A byte[].
+ */
+ public static byte[] toBytes(long n) {
+ return toBytes(n, new byte[8]);
+ }
+ /**
+ * Build a 8-byte array from a long. No check is performed on the
+ * array length.
+ *
+ * @param n The number to convert.
+ * @param b The array to fill.
+ * @return A byte[].
+ */
+ public static byte[] toBytes(long n, byte[] b) {
+ b[7] = (byte) (n);
+ n >>>= 8;
+ b[6] = (byte) (n);
+ n >>>= 8;
+ b[5] = (byte) (n);
+ n >>>= 8;
+ b[4] = (byte) (n);
+ n >>>= 8;
+ b[3] = (byte) (n);
+ n >>>= 8;
+ b[2] = (byte) (n);
+ n >>>= 8;
+ b[1] = (byte) (n);
+ n >>>= 8;
+ b[0] = (byte) (n);
+
+ return b;
+ }
+ /**
+ * Build a long from first 8 bytes of the array.
+ *
+ * @param b The byte[] to convert.
+ * @return A long.
+ */
+ public static long toLong(byte[] b) {
+ return ((((long) b[7]) & 0xFF)
+ + ((((long) b[6]) & 0xFF) << 8)
+ + ((((long) b[5]) & 0xFF) << 16)
+ + ((((long) b[4]) & 0xFF) << 24)
+ + ((((long) b[3]) & 0xFF) << 32)
+ + ((((long) b[2]) & 0xFF) << 40)
+ + ((((long) b[1]) & 0xFF) << 48)
+ + ((((long) b[0]) & 0xFF) << 56));
+ }
+ /**
+ * Compares two byte arrays for equality.
+ *
+ * @param a A byte[].
+ * @param b A byte[].
+ * @return True if the arrays have identical contents.
+ */
+ public static boolean areEqual(byte[] a, byte[] b) {
+ int aLength = a.length;
+ if (aLength != b.length) {
+ return false;
+ }
+ for (int i = 0; i < aLength; i++) {
+ if (a[i] != b[i]) {
+ return false;
+ }
+ }
+ return true;
+ }
+ /**
+ * <p>Compares two byte arrays as specified by <code>Comparable</code>.
+ *
+ * @param lhs - left hand value in the comparison operation.
+ * @param rhs - right hand value in the comparison operation.
+ * @return a negative integer, zero, or a positive integer as
+ * <code>lhs</code> is less than, equal to, or greater than
+ * <code>rhs</code>.
+ */
+ public static int compareTo(byte[] lhs, byte[] rhs) {
+ if (lhs == rhs) {
+ return 0;
+ }
+ if (lhs == null) {
+ return -1;
+ }
+ if (rhs == null) {
+ return +1;
+ }
+ if (lhs.length != rhs.length) {
+ return ((lhs.length < rhs.length) ? -1 : +1);
+ }
+ for (int i = 0; i < lhs.length; i++) {
+ if (lhs[i] < rhs[i]) {
+ return -1;
+ } else if (lhs[i] > rhs[i]) {
+ return 1;
+ }
+ }
+ return 0;
+ }
+ /**
+ * Build a short from first 2 bytes of the array.
+ *
+ * @param b The byte[] to convert.
+ * @return A short.
+ */
+ public static short toShort(byte[] b) {
+ return (short) ((b[1] & 0xFF) + ((b[0] & 0xFF) << 8));
+ }
+ }
+ /**
+ * Base 16 encoder.
+ *
+ * @author Marc Prud'hommeaux
+ */
+ public static final class Base16Encoder {
+
+ private final static char[] HEX = new char[]{
+ '0', '1', '2', '3', '4', '5', '6', '7',
+ '8', '9', 'A', 'B', 'C', 'D', 'E', 'F' };
+ /**
+ * Convert bytes to a base16 string.
+ */
+ public static String encode(byte[] byteArray) {
+ StringBuilder hexBuffer = new StringBuilder(byteArray.length * 2);
+ for (int i = 0; i < byteArray.length; i++)
+ for (int j = 1; j >= 0; j--)
+ hexBuffer.append(HEX[(byteArray[i] >> (j * 4)) & 0xF]);
+ return hexBuffer.toString();
+ }
+ /**
+ * Convert a base16 string into a byte array.
+ */
+ public static byte[] decode(String s) {
+ int len = s.length();
+ byte[] r = new byte[len / 2];
+ for (int i = 0; i < r.length; i++) {
+ int digit1 = s.charAt(i * 2), digit2 = s.charAt(i * 2 + 1);
+ if (digit1 >= '0' && digit1 <= '9')
+ digit1 -= '0';
+ else if (digit1 >= 'A' && digit1 <= 'F')
+ digit1 -= 'A' - 10;
+ if (digit2 >= '0' && digit2 <= '9')
+ digit2 -= '0';
+ else if (digit2 >= 'A' && digit2 <= 'F')
+ digit2 -= 'A' - 10;
+
+ r[i] = (byte) ((digit1 << 4) + digit2);
+ }
+ return r;
+ }
+ }
+
+
+
+}
+
+//========================================= APACHE BLOCK =========================================
+
diff --git a/src/Java/gtPlusPlus/core/util/uuid/UUIDUtils.java b/src/Java/gtPlusPlus/core/util/uuid/UUIDUtils.java
new file mode 100644
index 0000000000..13eaff5bc8
--- /dev/null
+++ b/src/Java/gtPlusPlus/core/util/uuid/UUIDUtils.java
@@ -0,0 +1,25 @@
+package gtPlusPlus.core.util.uuid;
+
+import java.nio.ByteBuffer;
+import java.util.UUID;
+
+public class UUIDUtils {
+
+ //UUID Methods below created by https://gist.github.com/jeffjohnson9046
+ //https://gist.github.com/jeffjohnson9046/c663dd22bbe6bb0b3f5e
+
+ public static byte[] getBytesFromUUID(UUID uuid) {
+ ByteBuffer bb = ByteBuffer.wrap(new byte[16]);
+ bb.putLong(uuid.getMostSignificantBits());
+ bb.putLong(uuid.getLeastSignificantBits());
+ return bb.array();
+ }
+
+ public static UUID getUUIDFromBytes(byte[] bytes) {
+ ByteBuffer byteBuffer = ByteBuffer.wrap(bytes);
+ Long high = byteBuffer.getLong();
+ Long low = byteBuffer.getLong();
+ return new UUID(high, low);
+ }
+
+}
generated by cgit (git 2.46.0) at 2025-03-11 01:05:29 +0000