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Diffstat (limited to 'openssl/crypto/des/README')
| -rw-r--r-- | openssl/crypto/des/README | 54 |
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diff --git a/openssl/crypto/des/README b/openssl/crypto/des/README new file mode 100644 index 000000000..621a5ab46 --- /dev/null +++ b/openssl/crypto/des/README @@ -0,0 +1,54 @@ + + 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) + |