# NOJSCAP client

The client directory includes NOJSCAP client implementations in multiple languages. Each version takes a challenge string and a difficulty level, then searches for a nonce such that the SHA-256 hash of `challenge + nonce` begins with the required number of leading zero bits.

## Implementations

- **C**: `nojscap.c`
- **Go**: `nojscap.go`
- **Python**: `nojscap.py`
- **JavaScript (Node.js)**: `nojscap.js`
- **Rust**: `nojscap.rs`

Each implementation provides similar usage and functionality.

---

## C Version

### Compilation

You need:

- GCC or any C compiler
- OpenSSL development libraries (`libssl-dev` on Debian-based systems)

```sh
gcc -O2 -o nojscap nojscap.c -lssl -lcrypto
```

### Usage

```sh
./nojscap <challenge_string> <difficulty_bits>
```

- `challenge_string`: Any input string used as the challenge.
- `difficulty_bits`: Integer between 1 and 256. Higher values are more computationally expensive.

### Example

```sh
./nojscap libroot12 26
Attempts: 0
Attempts: 1048576
Attempts: 2097152
Attempts: 3145728
Attempts: 4194304
Attempts: 5242880
Attempts: 6291456
Found nonce: 6368109
Hash: 0000000e724d990815e84e8a53f3f2410875046fe62a050de830d706b853ebe2
```

---

## Python

```sh
python3 nojscap.py <challenge_string> <difficulty_bits>
```

May require the `hashlib` module if using older Python verisons (standard in Python 3).

## Go

```sh
go run nojscap.go <challenge_string> <difficulty_bits>
```

Requires Go 1.13+.

## JavaScript (Node.js)

```sh
node nojscap.js <challenge_string> <difficulty_bits>
```

Uses the built-in `crypto` module.

## Rust

```sh
rustc nojscap.rs -o nojscap_rs
./nojscap_rs <challenge_string> <difficulty_bits>
```

Requires Rust and `sha2` crate if using the `Cargo` version.