OpenSSL-EVP-C++

This project demonstrates how to use the OpenSSL EVP API (openssl/evp.h) in C++ to implement various cryptographic techniques. It serves as an introductory guide to the powerful features provided by OpenSSL's EVP API, covering the following areas:

• Hashing: Securely hash data using various algorithms.
• Key Generation: Create cryptographic keys for signing, encryption, and decryption tasks.
• Signing: Use private keys to sign data for authentication purposes.
• Verifying: Verify signatures to ensure data integrity and authenticity.

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Features

• Comprehensive examples of hashing, signing, and verifying.
• Demonstrates how to handle cryptographic key generation.
• A clean and structured approach to using the EVP API in C++.

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Prerequisites

Ensure the following dependencies are installed:

OpenSSL Installation

On Ubuntu/Debian-based Systems:

sudo apt-get install openssl

On Arch-based Systems:

sudo pacman -S openssl

Development Tools

• GCC or Clang compiler
• make utility

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Getting Started

Building the Program

1. Clean Previous Builds Remove any existing compiled files:

   make clean

2. Compile the Program Build the main executable:

   make main

3. Run the Program Execute the compiled program using:

   ./object/main

   Alternatively, you can use the following command:

   make exec

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Example Usage

Demonstrate cryptographic techniques like:

• Hashing a message
• Generating and saving cryptographic keys
• Signing a message with a private key
• Verifying the signature with a public key

Refer to the source code for detailed examples.

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License

This project is licensed under both the OpenSSL License and the Apache License 2.0. For more details, refer to the LICENSE file or the links below:

• OpenSSL License
• Apache License 2.0

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Acknowledgments

This project utilizes the OpenSSL library, an industry-standard tool for secure communication and cryptographic operations.