# diffie-hellman-php

**Repository Path**: wang-guanglei99/diffie-hellman-php

## Basic Information

- **Project Name**: diffie-hellman-php
- **Description**: php DH加密库
- **Primary Language**: Unknown
- **License**: Not specified
- **Default Branch**: master
- **Homepage**: None
- **GVP Project**: No

## Statistics

- **Stars**: 0
- **Forks**: 0
- **Created**: 2024-02-01
- **Last Updated**: 2024-02-01

## Categories & Tags

**Categories**: Uncategorized

**Tags**: None

## README

Diffie-Hellman Key Exchange (PHP)
============
This is an academic example of the diffie-hellman key exchange in PHP. It is  not meant to be used for any real world purpose. The values of $p; $g; $a; $b are generated randomly as per the Diffie-Hellman protocol.

Requirements
============

This library requires `PHP >= 7.x` and the `GNU Multiple Precision/GMP` functions enabled in PHP's `Mathematical Extensions` (http://php.net/manual/en/book.gmp.php)
without this it will NOT work. This application is meant to handle very large integers, tested as high as 3072 bits.

Installation
============
Application can be run from anywhere. On windows, you can just put it in the same folder as your PHP binary.

Usage
============
Run via terminal. The program takes the size of the prime number p in the specified bit range.

Command:

`php ./diffie-hellman.php 32`

Output:

`The value of p selected: 2205759217`

`The value of g selected: 2000375980`

`The value of a selected by Alice: 2016295672`

`The value of b selected by Bob: 1146783380`

`The value of A sent to Bob by Alice: 591592312`

`The value of B sent to Bob by Alice: 287287597`

`Shared Key: 218785632`

License
============

This is free and unencumbered software released into the public domain for educational purposes.