MD5 and Zip Libraries

[Baker]

[andrewj]

By MD5 you mean the message digest algorithm (not the model format), right?

One place is in Quake3: code/qcommon/md5.c

I've written a C++ class for it:
http://edge.svn.sourceforge.net/viewvc/ ... xt%2Fplain
http://edge.svn.sourceforge.net/viewvc/ ... xt%2Fplain

For ZIP archives, LibPHYSFS is probably the best way to go, though Quake3 does have reading code (for pk3 files) in code/qcommon/unzip.cc but it's pretty hard to follow.

I've written some *very basic* C++ code to read and write ZIP files:
http://oblige.svn.sourceforge.net/viewv ... xt%2Fplain
http://oblige.svn.sourceforge.net/viewv ... xt%2Fplain

[Baker]

[revelator]

physfs is cool it also handles quake1 pak files doom formats etc.
Maybe good as a general archive handler for quake ?.

[Spirit]

http://7-zip.org is LGPL

[mh]

7-zip was the first one I thought of too, but I'm not certain what would be involved in integrating it into another program the way Baker wants.

I use the RSA MD5 code which is public domain. http://www.ietf.org/rfc/rfc1321.txt

[Baker]

[Spike]

the only time I've used md5 hashes was for smtp/pop3 protocol stuff...
if you're protecting passwords, you should use something else if you're not bound by compatibility.
if its just for cheat protection then I guess it makes no real difference.
sha1 is generally greatly favoured nowadays.

[Stroggos]

miniz is also Public Domain:


On top of that if you're already using zlib all you need to do is place the source file in your project and you're set.

[Baker]

[Spike]

aye, makes no real difference then. md5 is a little faster than sha1, so still works nicely for hashes and stuff, though its not as fast as eg adler32 (commonly part of zlib).
heck, texture compares could probably be just the first four bytes of the image, though I know that zquake+ uses crcs for that.

from a quakeworld perspective, all engines already have code for md4, as well as some 16bit crc. Spoilt for choice really. The crc provides network proxy protection (supposedly), while md4 provides map verification to stop people from chopping out all the walls in the map.

Soo... As you were!

[Baker]