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