Re: MD5 and RPG or...?

[Keith Carpenter <carpcon@xxxxxxx>]

If done correctly, it won't matter whether the hash was done with one or 
multiple calls to the MD5 functions.  If you look at the source for the 
typical "md5sum", it processes a file in blocks (multiple calls).

I've compared md5sum in PASE, ILE C, and ILE C modified to use CIPHER. 
CIPHER was the fastest with PASE close behind.  ILE C (no MI) is a 
slower.  RPG using CIPHER should perform well.

Remember to consider ebcdic/ascii issues if not processing files as binary.


Keith



Tom Liotta wrote:
> midrange-l-request@xxxxxxxxxxxx wrote:
>
>
> >  7. RE: MD5 and RPG or...? (Wilt, Charles)
> >
> > You should be able to find more info in the archives.  But there's a couple of parameters that allow you to call CIPHER repeatedly, once for each chunk of an unlimited size file.
>
>
> Charles:
>
> There are a lot of archive references, but nearly all that I read were 
> concerned with individual calls to CIPHER. The only ones that seemed beyond 
> that were Leif's and the lone unanswered one (which is what made me wonder how 
> fruitful further searching/reading would be).
>
> It'll be interesting to see how a series of CIPHERs matches with md5sum.
>
> Thanks.
>
> Tom Liotta