Mercurial > dropbear

annotate libtomcrypt/notes/etc/NoekeonVects.java @ 1829:a7cc3332d8ab

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Replace ChanType.sepfds with Channel.bidir_fd This handles the case where a svrchansess has separate FDs for nopty, but a single FD for pty mode. The use of sepfds was also previously incorrect for X11 and agent forwarding
author Matt Johnston <matt@ucc.asn.au>
date Mon, 11 Oct 2021 15:42:14 +0800
parents 6dba84798cd5
children
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1 /*
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2 NoekeonVects.java - Generate Noekeon test vectors using BouncyCastle.
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3
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4 Written in 2011 by Patrick Pelletier <[email protected]>
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5
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6 To the extent possible under law, the author(s) have dedicated all
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7 copyright and related and neighboring rights to this software to
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8 the public domain worldwide. This software is distributed without
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9 any warranty.
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10
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11 This file is dedicated to the public domain with the CC0 Public Domain
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12 Dedication: http://creativecommons.org/publicdomain/zero/1.0/legalcode.txt
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13
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14 You may also consider this file to be covered by the WTFPL, as contained
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15 in the LibTomCrypt LICENSE file, if that makes you happier for some reason.
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16
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17 ----------------------------------------------------------------------
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18
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19 This program was inspired by the comment in Botan 1.10.1's
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20 doc/examples/eax_test.cpp:
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21
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22 // Noekeon: unknown cause, though LTC's lone test vector does not
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23 // match Botan
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24
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25 So, I investigated the discrepancy by comparing them with a third
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26 implementation, BouncyCastle: http://www.bouncycastle.org/java.html
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27
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28 I determined that there are two reasons why LibTomCrypt's Noekeon does
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29 not match Botan:
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30
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31 1) Botan uses "indirect Noekeon" (with a key schedule), while
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32 LibTomCrypt and BouncyCastle both use "direct Noekeon" (without
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33 a key schedule). See slide 14 of
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34 http://gro.noekeon.org/Noekeon-slides.pdf
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35
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36 2) However, LibTomCrypt's direct Noekeon still does not match
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37 BouncyCastle's direct Noekeon. This is because of a bug in
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38 LibTomCrypt's PI1 and PI2 functions:
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39 https://github.com/libtom/libtomcrypt/issues/5
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40
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41 This program uses BouncyCastle to produce test vectors which are
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42 suitable for Botan (by explicitly scheduling the key, thus
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43 building indirect Noekeon out of BouncyCastle's direct Noekeon),
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44 and also produces test vectors which would be suitable for
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45 LibTomCrypt (direct Noekeon) once its PI1 and PI2 functions are
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46 fixed to match the Noekeon specification.
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47
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48 Although this program uses a PRNG from BouncyCastle to generate
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49 data for the test vectors, it uses a fixed seed and thus will
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50 produce the same output every time it is run.
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51 */
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52
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53 import java.io.ByteArrayOutputStream;
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54 import java.io.IOException;
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55 import java.util.Locale;
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56 import org.bouncycastle.crypto.digests.RIPEMD128Digest;
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57 import org.bouncycastle.crypto.engines.NoekeonEngine;
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58 import org.bouncycastle.crypto.modes.EAXBlockCipher;
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59 import org.bouncycastle.crypto.params.AEADParameters;
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60 import org.bouncycastle.crypto.params.KeyParameter;
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61 import org.bouncycastle.crypto.prng.DigestRandomGenerator;
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62 import org.bouncycastle.util.encoders.HexEncoder;
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63
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64 public class NoekeonVects
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65 {
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66 private final DigestRandomGenerator r =
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67 new DigestRandomGenerator(new RIPEMD128Digest());
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68
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69 private final HexEncoder h = new HexEncoder();
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70
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71 private final NoekeonEngine noekeon = new NoekeonEngine();
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72
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73 private final KeyParameter null_key = new KeyParameter(new byte[16]);
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74
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75 private final boolean schedule_key;
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76
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77 private final boolean botan_format;
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78
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