LegacyMD5CngInNetCore

A cross-platform compatibility library for legacy .NET applications that need MD5 hashing on modern .NET runtimes.

🛠️ Overview

LegacyMD5CngInNetCore aims to simplify the migration of legacy applications that rely on the MD5Cng API to modern .NET environments, including Linux, macOS, and Docker containers.

It provides an alternative approach to generating MD5 hashes on platforms where the Windows-specific MD5Cng implementation is unavailable, while helping preserve compatibility with existing hashing workflows.

🚀 Key Features

• Cross-Platform Support: Designed for Linux, macOS, and containerized environments.
• Modern .NET Compatibility: Intended for applications targeting modern .NET versions, including .NET 6, 7, and 8.
• Legacy Integration: Helps reduce changes when migrating applications that depend on the legacy MD5Cng API.
• Native Cryptography Support: Relies on the cryptographic capabilities available through the underlying .NET runtime and platform.

📦 Use Cases

• Migrating legacy applications from .NET Framework to modern .NET.
• Maintaining compatibility with systems that require MD5-based checksums.
• Supporting legacy integrations that depend on existing MD5 hashing behavior.
• Testing and debugging cross-platform applications that use MD5.

⚠️ Security Considerations

• MD5 is cryptographically broken. Do not use it for passwords, digital signatures, or security-sensitive integrity verification.
• Not FIPS-compliant by default. Using MD5 does not provide FIPS compliance, regardless of the underlying platform or implementation.
• Compatibility is not guaranteed. Verify hash outputs and platform behavior against your existing implementation before deploying to production.

🎯 Goal

Provide a practical migration path for legacy .NET applications that need to preserve MD5-based compatibility while moving to modern, cross-platform runtimes.