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| 2 | libdes, Version 3.00 93/10/07 |
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| 3 | |
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| 4 | Copyright (c) 1993, Eric Young |
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| 5 | All rights reserved. |
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| 6 | |
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| 7 | This program is free software; you can redistribute it and/or modify |
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| 8 | it under the terms of either: |
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| 9 | |
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| 10 | a) the GNU General Public License as published by the Free |
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| 11 | Software Foundation; either version 1, or (at your option) any |
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| 12 | later version, or |
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| 13 | |
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| 14 | b) the "Artistic License" which comes with this Kit. |
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| 15 | |
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| 16 | This program is distributed in the hope that it will be useful, |
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| 17 | but WITHOUT ANY WARRANTY; without even the implied warranty of |
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| 18 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See either |
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| 19 | the GNU General Public License or the Artistic License for more details. |
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| 20 | |
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| 21 | You should have received a copy of the Artistic License with this |
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| 22 | Kit, in the file named "Artistic". If not, I'll be glad to provide one. |
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| 23 | |
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| 24 | You should also have received a copy of the GNU General Public License |
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| 25 | along with this program; if not, write to the Free Software |
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| 26 | Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA. |
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| 27 | --- |
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| 28 | This kit builds a DES encryption library and a DES encryption program. |
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| 29 | It suports ecb, cbc, ofb, cfb, triple ecb, triple cbc and MIT's pcbc |
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| 30 | encryption modes and also has a fast implementation of crypt(3). |
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| 31 | It contains support routines to read keys from a terminal, |
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| 32 | generate a random key, generate a key from an arbitary length string, |
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| 33 | read/write encrypted data from/to a file descriptor. |
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| 34 | |
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| 35 | The implementation was written so as to conform with the manual entry |
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| 36 | for the des_crypt(3) library routines from MIT's project Athena. |
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| 37 | |
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| 38 | destest should be run after compilation to test the des routines. |
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| 39 | rpw should be run after compilation to test the read password routines. |
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| 40 | The des program is a replacement for the sun des command. I believe it |
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| 41 | conforms to the sun version. |
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| 42 | |
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| 43 | The Imakefile is setup for use in the kerberos distribution. |
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| 44 | |
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| 45 | These routines are best compiled with gcc or any other good |
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| 46 | optimising compiler. |
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| 47 | Just turn you optimiser up to the highest settings and run destest |
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| 48 | after the build to make sure everything works. |
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| 49 | |
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| 50 | I believe these routines are close to the fastest and most portable DES |
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| 51 | routines that use small lookup tables (4.5k) that are publicly available. |
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| 52 | The fcrypt routine is faster than ufc's fcrypt (when compiling with |
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| 53 | gcc2 -O2) on the sparc 2 (1410 vs 1270) but is not so good on other machines |
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| 54 | (on a sun3/260 168 vs 336). |
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| 55 | |
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| 56 | Eric Young (eay@psych.psy.uq.oz.au) |
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