Secure Hasher Project

Overview

The Secure Hasher Project is a cross-platform Java application designed to securely generate a strong hash of a UTF-8 encoded string, download a public key from a remote URL, and encrypt the hash using that public key. To enhance security, the hashing and encryption logic is implemented in C++ to make reverse-engineering more difficult.

Features

• Secure hashing of UTF-8 encoded strings.
• Encryption using public keys retrieved from remote URLs.
• Hybrid Java and C++ implementation for enhanced security.
• Cross-platform support (Windows, macOS, Linux).

Prerequisites

Java Requirements

• Java JDK (version 8 or higher) - Download Here
• Maven - Download Here

C++ Requirements

• GCC (for compiling C++ code):
  • Pre-installed on most Linux systems.
  • Available via MinGW for Windows - Download Here
• OpenSSL library (for encryption) - Download Here

Setup Instructions

1. Compile Java Code to Generate Header File

javac -cp "C:\Users\Ole Kacak\.m2\repository\org\json\json\20210307\json-20210307.jar" -h ../cpp src/main/java/com/secure/SecureHasher.java

2. Compile C++ Code

g++ -shared -o SecureHasherNative.dll -I"%JAVA_HOME%\include" -I"%JAVA_HOME%\include\win32" SecureHasher.cpp -lssl -lcrypto

3. Package the Application Using Maven

mvn compile package

Running the Application

java -Djava.library.path="target" -cp "target/hashing-1.0-SNAPSHOT.jar;target/json-20210307.jar" com.secure.SecureHasher

Additional Notes

• Ensure the SecureHasherNative.dll (or libSecureHasherNative.so for Linux) file is present in the target folder before running the application.
• Make sure the OpenSSL library is installed and accessible during the compilation of the C++ code.
• Adjust file paths and extensions according to your operating system.

Compatibility

• Windows (DLL handling).
• macOS (Requires compilation with .dylib).
• Linux (Requires compilation with .so).