99N/A

99N/A libdes, Version 4.01 10-Jan-97

99N/A

99N/A Copyright (c) 1997, Eric Young

99N/A All rights reserved.

99N/A

99N/A This program is free software; you can redistribute it and/or modify

99N/A it under the terms specified in COPYRIGHT.

99N/A

99N/A--

99N/AThe primary ftp site for this library is

99N/Alibdes is now also shipped with SSLeay. Primary ftp site of

99N/A

99N/AThe best way to build this library is to build it as part of SSLeay.

99N/A

99N/AThis kit builds a DES encryption library and a DES encryption program.

99N/AIt supports ecb, cbc, ofb, cfb, triple ecb, triple cbc, triple ofb,

99N/Atriple cfb, desx, and MIT's pcbc encryption modes and also has a fast

2302N/Aimplementation of crypt(3).

99N/AIt contains support routines to read keys from a terminal,

127N/Agenerate a random key, generate a key from an arbitrary length string,

99N/Aread/write encrypted data from/to a file descriptor.

99N/A

99N/AThe implementation was written so as to conform with the manual entry

99N/Afor the des_crypt(3) library routines from MIT's project Athena.

2302N/A

618N/Adestest should be run after compilation to test the des routines.

99N/Arpw should be run after compilation to test the read password routines.

99N/AThe des program is a replacement for the sun des command. I believe it

844N/Aconforms to the sun version.

2302N/A

99N/AThe Imakefile is setup for use in the kerberos distribution.

1258N/A

99N/AThese routines are best compiled with gcc or any other good

2818N/Aoptimising compiler.

2818N/AJust turn you optimiser up to the highest settings and run destest

2818N/Aafter the build to make sure everything works.

99N/A

99N/AI believe these routines are close to the fastest and most portable DES

99N/Aroutines that use small lookup tables (4.5k) that are publicly available.

99N/AThe fcrypt routine is faster than ufc's fcrypt (when compiling with

783N/Agcc2 -O2) on the sparc 2 (1410 vs 1270) but is not so good on other machines

783N/A(on a sun3/260 168 vs 336). It is a function of CPU on chip cache size.

783N/A[ 10-Jan-97 and a function of an incorrect speed testing program in

99N/A ufc which gave much better test figures that reality ].

99N/A

196N/AIt is worth noting that on sparc and Alpha CPUs, performance of the DES

196N/Alibrary can vary by upto %10 due to the positioning of files after application

196N/Alinkage.

196N/A

99N/AEric Young (eay@cryptsoft.com)

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1938N/A