RSA Message Signing and Verification

This repository contains a Python program for signing and verifying messages using RSA encryption.

Setup

To run the program, ensure you have Python 3 installed on your system.

Usage

Generating RSA Keys

To generate RSA key pairs, execute the following command:

python3 *.py 1

Alternatively, you can use:

make run

This will create two files:

• e_n.csv: Public key
• d_n.csv: Private key

Signing a Message

To sign a message, execute the following command:

python3 *.py 2 s message.txt

Or using the make command:

make run2 MESSAGE=message.txt

This will create a file named message.txt.signed which includes the original message along with the encrypted signature.

Verifying a Signature

To verify a signature, execute the following command:

python3 *.py 2 v message.txt.signed

Or using the make command:

make run2v MESSAGE=message.txt.signed

This will verify the signature against the content of the file and output whether the signature is valid or not.

File Structure

• README.md: Instructions and information about the repository.
• *.py: Python scripts for generating keys, signing, and verifying messages.
• message.txt: Text file containing the message to be signed.
• e_n.csv: CSV file containing the public key.
• d_n.csv: CSV file containing the private key.
• message.txt.signed: File containing the original message with the encrypted signature.

Notes

• Ensure you have proper permissions set up to execute the Python scripts.
• Make sure to have all necessary dependencies installed.

Please feel free to contribute or report issues!