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| 1 | |||
| 2 | libdes, Version 4.01 10-Jan-97 | ||
| 3 | |||
| 4 | Copyright (c) 1997, Eric Young | ||
| 5 | All rights reserved. | ||
| 6 | |||
| 7 | This program is free software; you can redistribute it and/or modify | ||
| 8 | it under the terms specified in COPYRIGHT. | ||
| 9 | |||
| 10 | -- | ||
| 11 | The primary ftp site for this library is | ||
| 12 | ftp://ftp.psy.uq.oz.au/pub/Crypto/DES/libdes-x.xx.tar.gz | ||
| 13 | libdes is now also shipped with SSLeay. Primary ftp site of | ||
| 14 | ftp://ftp.psy.uq.oz.au/pub/Crypto/SSL/SSLeay-x.x.x.tar.gz | ||
| 15 | |||
| 16 | The best way to build this library is to build it as part of SSLeay. | ||
| 17 | |||
| 18 | This kit builds a DES encryption library and a DES encryption program. | ||
| 19 | It supports ecb, cbc, ofb, cfb, triple ecb, triple cbc, triple ofb, | ||
| 20 | triple cfb, desx, and MIT's pcbc encryption modes and also has a fast | ||
| 21 | implementation of crypt(3). | ||
| 22 | It contains support routines to read keys from a terminal, | ||
| 23 | generate a random key, generate a key from an arbitrary length string, | ||
| 24 | read/write encrypted data from/to a file descriptor. | ||
| 25 | |||
| 26 | The implementation was written so as to conform with the manual entry | ||
| 27 | for the des_crypt(3) library routines from MIT's project Athena. | ||
| 28 | |||
| 29 | destest should be run after compilation to test the des routines. | ||
| 30 | rpw should be run after compilation to test the read password routines. | ||
| 31 | The des program is a replacement for the sun des command. I believe it | ||
| 32 | conforms to the sun version. | ||
| 33 | |||
| 34 | The Imakefile is setup for use in the kerberos distribution. | ||
| 35 | |||
| 36 | These routines are best compiled with gcc or any other good | ||
| 37 | optimising compiler. | ||
| 38 | Just turn you optimiser up to the highest settings and run destest | ||
| 39 | after the build to make sure everything works. | ||
| 40 | |||
| 41 | I believe these routines are close to the fastest and most portable DES | ||
| 42 | routines that use small lookup tables (4.5k) that are publicly available. | ||
| 43 | The fcrypt routine is faster than ufc's fcrypt (when compiling with | ||
| 44 | gcc2 -O2) on the sparc 2 (1410 vs 1270) but is not so good on other machines | ||
| 45 | (on a sun3/260 168 vs 336). It is a function of CPU on chip cache size. | ||
| 46 | [ 10-Jan-97 and a function of an incorrect speed testing program in | ||
| 47 | ufc which gave much better test figures that reality ]. | ||
| 48 | |||
| 49 | It is worth noting that on sparc and Alpha CPUs, performance of the DES | ||
| 50 | library can vary by upto %10 due to the positioning of files after application | ||
| 51 | linkage. | ||
| 52 | |||
| 53 | Eric Young (eay@cryptsoft.com) | ||
| 54 | |||
