Sample code

Before you run the example files, ensure that the following prerequisites are stored in the same place as requirements.txt, main.py and dtmCSC.py files:

cert.pem file
key.pem file
chain.pem file
JPEG image to be signed (under 4MB).
Python 3.10 or higher. (Python 3.11 is recommended)
PIN

Note

This sample code works with a file named road.jpg and returns signed image named signed_road.jpg.

Run the script

Go to the directory where the above items and python scripts are stored (including requirements.txt), run:
```
cd ./folder_name 
```

Create a virtual environment, run:

python -m venv venv or python3.11 -m venv venv

Activate the virtual environment, run:

source venv/bin/activate (mac/linux)      
.\venv\Scripts\activate (Windows)      
.\venv\Scripts\Activate.ps1 (Windows powershell)      
.\venv\Scripts\activate.bat (Windows command prompt)

Your prompt will show (venv) to indicate that it is active.

Install requirements.txt, run:
```
pip install -r requirements.txt  
```
An outdated pip causes installation errors. To upgrade it inside your virtual environment run:
```
python -m pip install --upgrade pip
```

To execute, run:

python3.11 main.py <unsigned_image_path> <signed_image_path>    
for ex- python3.11 main.py image.jpg signed_image.jpg

In this section: