Ittooka couple of evenings to divine the format of an installshield 2 filein thismanner. I used wisdec to explore the compiled files, changing scripts, recompiling them, and observing the differences reported by wisdec. Wisdec is amasterful piece of work, which obviously involved reverse engineeringtheinstallshield compiler to discover the format of the compiled scriptfiles. IsDcc was written with the help of wisdec v1.0, by NaTzGUL/SiraX, see NaTzGUL's InstallSHIELD Script Cracking. GNU Emacs, and MS Visual C++ would be useful if you intend torecompile the thing. Due to the nature ofthe original installshield compiler, the 'original' source code cannotbe recovered exactly, but compilable scripts are produced, providingthe same version of the installshield compiler is used to recompilethem. Like wisdec, isDcc allows decompilation of a compiled installshieldscript (.ins file) into source code (.rul file). It describes howthemain algorithms work, so you should have a good understanding ofcomputeralgorithm design. This is an overview of the main structure of isDcc.

( ) Beginner ( ) Intermediate (X) Advanced () Expert There is a crack, a crack ineverything That's how the light gets in There is a crack, a crack ineverything That's how the light gets in. Transparency and free knowledge are our (very strong) weapons, dark hyding and hideous concealing are the (very strong) weapons of our enemies. In a sofware world where more and more processes are hidden or concealed from the users, the fact that (some) users are re-gaining control is a very positive development. Installshield decompiling is developing into a full-fledged science, after NaTzGUL's 'bahnbrechenden' InstallSHIELD Script Cracking. You'll be able to download isDcc either here or on Andrew's main page.

a 'real' reversing essay! Andrew shows us all here what's like when you seriously work on an 'our tools' project. Laste_09.htm: isDcc: An installshield DecompilerĬourtesy of Fravia's page of reverse engineering

Decompiler installshield