# Digital-Signatures-Library
A Digital Signatures Library (RSA)preceded with a hashing(SHA-1) library in C language

Requirement: gcc 6.2 or above
Project Execution on system:

Download all files except server.c on client side.
Download server.c, sha1.c, sha1.h files on server side.

Change the IP address of Server in client.c file on line number 30.

Run following commands in terminal:
First, on server side
  gcc -c server.c -o server.o
  gcc -c sha1.c -o sha1.o
  gcc server.o sha1.o -o server
  ./server

Then, on client side
  gcc -c client.c -o client.o
  gcc -c sha1.c -o sha1.o
  gcc -c rsa.c -o rsa.o
  gcc client.o sha1.o rsa.o -o client
  ./client


Future Scope: Improving RSA implementation by using 128 bit keys (stored using an array).

The Project is licensed under GNU-GPl