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Lemma9

Verification of Cryptographic Protocols with Unbounded Sessions

An implementation of inductive invariants checking and inference for depth-bounded protocols.

The name comes from a "Lemma 9" which was the internal name of a cornerstone component of the verification method, now called "Absorption Lemma".

Contacts

This work is licensed under a Creative Commons Attribution 4.0 International License. Please give proper attribution.

Reproducing the results

The benchmark models can be found in benchmarks.

To reproduce the results on the benchmarks, first you need to install all the dependencies as explained in the next section. Then by running pytest -s tests/test_Timing.py from the root directory the solver will check each benchmark and produce a table of timings and results.

Running the tests to completion takes approximately 15 minutes on a standard laptop. To select a subset of the benchmarks for testing, open tests/test_Timing.py and comment the entries of the benchmarks you want to exclude in the main ordered dictionary, then run pytest -s tests/test_Timing.py from the root directory.

How to install and run benchmarks

The program is written in Python 2.7. We recommend using pyenv and pip to setup the right environment and install dependencies, as detailed below. A Dockerfile is provided and can be used to create a container running the tool with all the dependencies installed. For details on usage of the tool, please look at the tutorial/TUTORIAL.md file.

Installing with pyenv

# ASSUMES this repo has been cloned into "lemma9"
cd lemma9
# OPTIONAL STEPS
pyenv virtualenv lemma9 # creates a new "lemma9" virtualenv
pyenv local lemma9      # sets virtualenv for this project
pyenv activate lemma9   # activate virtualenv
# END OPTIONAL STEPS
# Install the dependencies:
pip install -r requirements.txt
# Run the tests displaying the results table:
pytest -s tests/test_Timing.py

Installing with virtualenv

If you don't like pyenv you can use virtualenv directly:

# If virtualenv is not installed:
pip install virtualenv
pip virtualenv venv # create new virtualenv in venv
source venv/bin/activate
# Install the dependencies:
pip install -r requirements.txt
# Run the tests displaying the results table:
pytest -s tests/test_Timing.py

Installing globally

If you don't like virtualenv either, you can always install the dependencies globally and, provided there is no dependency conflict, run the tests:

pip install -r requirements.txt
pytest -s tests/test_Timing.py

Using Docker

With Docker installed, you can build an image with

docker build -t lemma9 .

from the root folder of the repo. Then you can run the benchmarks using

docker run lemma9

If you want to experiment with Lemma9's CLI and tutorial, run

docker run -it --entrypoint /bin/bash lemma9

which will give you an interactive shell within the container.

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