BRUTE and BRUTESAV are programs designed to perform a brute forcekeysearch on S/MIME messages encrypted with 40-bit RC2. The followingfiles are included:

brute.exe - a Win32 console-based application (meaning that you mustrun it at a command prompt under Windows 95 or NT) that is themain brute force searcher
brutesav.scr - a Win32 screen saver version of the same thing
b64tobin.exe - converts a Base64 encoding to its binary equivalent.This will be used to convert an S/MIME message into a form wecan use.
parse.exe - takes a binary S/MIME message and strips out the ASN.1formatting, resulting in raw ciphertext for brute.exe's use.
prep.bat - just combines b64tobin and parse into a single step
startpt.exe - creates an initial starting point for brute. See thecomments on 'Picking a Start Point' below.
starttbl.bin - a data file for startpt.exe.
test.exe - will create a test file of the same form as the outputof parse.exe, used to make sure brute.exe can actually decryptthings.