Setup

Install Rust

First, you need a Rust environment. If you don't have it yet, install it with:

curl --proto '=https' --tlsv1.2 https://sh.rustup.rs -sSf | sh

Then, add Rust to your PATH. Add the following to your .bash_profile or .bash_rc:

export PATH="$HOME/.cargo/bin:$PATH"

Don't forget to source it.

Install circom

Build and install from source:

cd ..
git clone https://github.com/iden3/circom.git
cd circom
cargo build --release
cargo install --path circom

Install npm packages

npm install

Project setup

Get git submodules:

git submodule update --init --recursive

Modify the necessary include files in circom-chacha20:

Update the includes in circom-chacha20/circuits/aes/helper_functions.circom as follows:

include "../../../node_modules/circomlib/circuits/bitify.circom";
include "../../../node_modules/circomlib/circuits/gates.circom";
include "../../../node_modules/circomlib/circuits/comparators.circom";

Update the includes in poseidon-encryption-circom2/circom/poseidon.circom as follows:

include "../../node_modules/circomlib/circuits/poseidon.circom";
include "../../node_modules/circomlib/circuits/escalarmulany.circom";

Run scripts

If you haven't performed the Trusted setup, do it first. Depending on the size of the image to be processed, the number of constraints should be at least 2^20.

./zkkey.sh somedir 20

Modify exec.sh as needed and run it:

./exec.sh