CircGen - Circuit Description Generation tool

This is a prototype of the CircGen tool. It is based on CompCert - a certified compiler for C (http://compcert.inria.fr). Please consult the original CompCert's README and its manual for addition information on CompCert on its copyright/usage instructions.

The current prototype translates source C programs into a representation of combinatory boolean circuits in a format accepted by most secure computation engines (the Bristrol SMC circuit syntax). The tool is fully functional but is still under active development. It still lacks support for specific features (such as division and moduli operations, floating-point types, etc.). Please refer to the paper A Fast and Verified Software Stack for Secure Function Evaluation for further details.

Instalation

This repository includes, as a submodule, the original CompCert distribution (v2.5).

Dependencies

In order to compile to prototype, the following dependencies are needed:

• Python3
• Ocaml functional language (version 4.00 or higher)
• Coq proof assistant (version 8.4.6)
• Menhir parser generator (version 20171222)
• SsReflect Ssreflect/MathComp (version 1.6.1)

All the above packages are available through the OPAM (Ocaml Package Manager).

opam install coq.8.4.6
opam install menhir.20171222
opam repo add coq-released https://coq.inria.fr/opam/released
opam install coq-mathcomp-algebra.1.6.1

Clone the repository

The circgen tool reposity includes the CompCert repository as a submodule. In order to clone it (including CompCert's repo) please perform:

$ git clone --recursive https://github.com/haslab/CircGen.git
$ cd circgen

Preparing the build directory

The tool is compiled in a dedicated build directory that only has links to both CompCert's and CircGen's source files. The toplevel Makefile includes a target to setup the build directory.

$ make clean_setup_build_dir
$ cd build

Compilation

To compile the tool, please execute ($OS is either macosx or linux):

$ ./configure bool-circ-$OS
$ make depend
$ make

Examples

Directory ./tests/bcircuits includes several examples on the usage of the tool. These examples include standard SMC test circuits, such as the AES symmetric cipher or the SHA-256 compression function.