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- The CryptSums utility checksums the Mach segments of an application at compile
- time and inserts encrypted checksums into the binary so the application can
- verify at startup that it hasn't been damaged or tampered with.
-
- Once properly installed, it allows you to simply do 'make secure' to create a
- secure version of you application. You'll still be able to do standard 'make'
- and 'make debug' without interference from the checksum test. CryptSums
- provides a simple routine that your application can call at startup/runtime
- to check that the segments in memory still result in the same checksum as the
- file at compile time. You select which Mach segments and sections to verify.
-
- Read CryptSums.rtf for details about how to install and use this utility.
-
- CryptSums is ShareWare, if you use it as is or as a basis for your own software
- security enhancements please chip in $5 per developer or $15 per network of
- developers. (There is no 'end user' charge for software that incorporates the
- CryptSums library.) Please include an EMail address if you're interested in
- update notices. There is no warranty provided on this software nor any
- software that incorporates it. Full sources are provided and bug reports are
- welcome. This software copyright 1992 by C.D.Lane -- all rights reserved.
-
- Christopher Lane
- 1843 Lenolt Street
- Redwood City, CA 94063-1068
-
- lane@sumex-aim.stanford.edu
-