Re: Borland C random number generator?

G. Wade Johnson (gwadej@anomaly.org)
Thu, 27 Aug 1998 19:42:07 -0500

• Next message: Laurent Demailly: "IRC (was Re: Crypto Coding Project)"
• Previous message: Mike Stay: "Re: Encrypted chat - Anonymous identification protocol"
• Maybe in reply to: Berke Durak: "Encrypted chat - Anonymous identification protocol"
• Next in thread: mlynn@west.raytheon.com: "Re[2]: Borland C random number generator?"

At 03:51 PM 8/26/98 -0700, you wrote:
>Does anyone know the constants used in Borland's Turbo C linear
>congruential PRNG used in their rand() function? I would guess it's
>the same as for Borland Professional C++ and the other versions, but
>don't know that for a fact.
>
>I'm trying to replicate a DOS crypto-like program's operation on my
>more convenient Linux box.
>
>Thanks -
>
> Jim Gillogly
> 4 Halimath S.R. 1998, 22:51
> 12.19.5.8.7, 10 Manik 20 Yaxkin, Fifth Lord of Night

As of version 4.5, it was
multiplier = 0x015a4e35L
increment = 1
seeds are mod 32768
output is right-shifted 16 bits then mod 32768

G. Wade
G. Wade Johnson Telescan, Inc. gwadej@anomaly.org
"any technology sufficiently advanced is indistinguishable from a Perl
script."
                                                 -- Programming Perl, 2nd ed.

• Next message: Laurent Demailly: "IRC (was Re: Crypto Coding Project)"
• Previous message: Mike Stay: "Re: Encrypted chat - Anonymous identification protocol"
• Maybe in reply to: Berke Durak: "Encrypted chat - Anonymous identification protocol"
• Next in thread: mlynn@west.raytheon.com: "Re[2]: Borland C random number generator?"