This directory contains a description and software for the RIPEMD-160 and RIPEMD-128 hash functions, as well as software for the MDx-MACs based on RIPEMD-160 and RIPEMD-128. The implementations are written for the sole purpose of documentation. No optimization whatsoever is performed: only readability and portability were kept in mind.

AB-9601.ps.gz:
description of RIPEMD-160 and RIPEMD-128. This has also been published in Fast Software Encryption, LNCS 1039, D. Gollmann (Ed.), pp. 71-82. This version differs from the published version in that a figure has been added, four small mistakes in the pseudo-code of Appendix A have been corrected, and the order in which the permutations pi and rhoi are applied in Section 3 have been exchanged. In addition, the hash value of the message consisting of 1 million 'a' characters has been added to Appendix B for both RIPEMD-160 and RIPEMD-128.
rmd160.c:
source code for RIPEMD-160
rmd160.h:
include file for RIPEMD-160. Make sure that the types byte and dword are respectively 8 and 32-bit unsigned quantities.
rmd128.c:
source code for RIPEMD-128
rmd128.h:
include file for RIPEMD-128. Make sure that the types byte and dword are respectively 8 and 32-bit unsigned quantities.
hashtest.c:
driver for both RIPEMD-160 and RIPEMD-128. Default is RIPEMD-160. For compilation with rmd128.c define RMDsize=128. Command line arguments of hashtest: any combination of
 filename -- compute hash code of file read binary
 -sstring -- print string & hashcode
 -t       -- perform time trial
 -x       -- execute standard test suite, ASCII input
A bug in the RMDonemillion() function of this driver has been corrected.

rmd160mc.c:
source code for RIPEMD160-MAC
rmd160mc.h:
include file for RIPEMD160-MAC. Make sure that the types byte and dword are respectively 8 and 32-bit unsigned quantities.
rmd128mc.c:
source code for RIPEMD128-MAC
rmd128mc.h:
include file for RIPEMD128-MAC. Make sure that the types byte and dword are respectively 8 and 32-bit unsigned quantities.
mactest.c:
driver for both RIPEMD160-MAC and RIPEMD128-MAC. Default is RIPEMD160-MAC. For compilation with rmd128mc.c define RMDsize=128. Command line arguments of mactest: any combination of
 filename keyfilename -- compute MAC of file binary read using 
                         key in keyfilename (hexadecimal format)
 -sstring             -- print string & MAC for default key
 -t                   -- perform time trial                        
 -x                   -- execute standard test suite, ASCII input

Any comments on the description or the implementation can be mailed to . See also the RIPEMD-160 web page for more information on all aspects of RIPEMD-160 and RIPEMD-128.