CTF Data

Installing

Prerequisites

• Docker
• solc-select
• mpwn
• Python 3

Configuration

You'll need to update the following environment variables:

• RPC_URL to a valid Ethereum JSON-RPC endpoint
• PYTHONPATH to point to mpwn

You'll also need to manually install the following:

• solc-select install 0.4.16 0.4.24 0.5.12 0.6.12 0.7.0 0.7.6 0.8.0
• pip install ecdsa sha3

Build everything

./build

Run a challenge

Running a challenge will open a port which users will nc to. For Ethereum related challenges, an additional port must be supplied so that users can connect to the Ethereum node (which forks from mainnet state)

./run babycrypto 31337

On another terminal:

nc localhost 31337

For ETH challenges:

./run bank 31337 8545

Running the autosolver

./solve

Add a new challenge

1. Copy one of the existing challenge directories and rename it to your challenge's name
2. Edit the info.yaml to add your details
3. Add your contracts under the public/contracts directory
4. Add any contracts which are supposed to be private, such as the source code for a rev challenge or a challenge solution under the contracts/private directory
5. Add it to the build script with the dirname and compiler version
6. (Optional) Allow it to be auto-solved:
   1. Do either of the following:
      • Add an private/Exploit.sol file with a constructor(Setup setup) constructor that solves the challenge
      • Add a private/solve.py if it requires additional actions to be executed (e.g. babycrypto, vault)
   2. Then add it to the solve script