Posted: 2012-10-23 Tags: Programming | MD5 | Lisp

The MD5 implementation for Common Lisp implemented by Pierre R. Mai a decade ago has been floating around in various tweaked versions for some time now. We have now produced a new consolidated release (release 2.0.0) of this with proper packaging, all known fixes and tweaks and implementation optimizations. The new release is still available from its PMSF page, and its new GitHub home.

Many thanks go to Christophe Rhodes, Alexey Dejneka, Nathan Froyd, Andreas Fuchs, John Desoi, Dmitriy Ivanov, and Kevin M. Rosenberg who improved, tweaked and maintained versions of MD5 over the years.

Note that MD5 has been cryptographically broken, and should therefore not be used in situations where a cryptographically secure hash function is needed. However due to its wide historical use and its remaining suitability in non-cryptographically secure settings, this implementation is still of some interest.

Posted: 2010-10-11 Tags: Programming | Deflate | Lisp

A new minor release of Deflate is available, which only contains two changes from 1.0.0:

1. Due to popular demand, the Deflate system is now called "deflate" instead of "Deflate", thus allowing (require :deflate) or (asdf:oos 'asdf:load-op :deflate) to do the right thing. Note that this is an incompatible change from version 1.0.0, thus requiring changes to system definition or init files referencing "Deflate" to reference "deflate" or :deflate or #:deflate instead. Sorry for the inconvenience.

2. A minor bug workaround for ECL, which also improves performance on ECL by a factor of 2 (although performance on ECL is still very much non-optimized, patches are always welcome). Note that you will need to use ECL from the current git repository, since only this version currently contains other fixes needed to let Deflate work correctly (thanks go to Juan Jose Garcia-Ripoll for the quick fixes)!

Links

• PMSF Resources Page for Deflate
• GitHub Project Page for Deflate