C++ SDK overview

Windows onlyInvite onlyC++17

EonAuth’s C++ SDK is a static library for Windows apps with a single public header. Your app includes eonauth.h, calls Init once, and then signs users in, checks their tiers and fetches protected data from any .cpp file:

#include "eonauth.h"

eonauth::LoginAsync(user, pass, [](const eonauth::Result& r) { /* runs on your UI thread */ });
if (eonauth::HasTier("Pro")) { /* instant, no network */ }

Getting access

The SDK is invite only for now. These docs are public so you can see what it does before you ask. To get it, DM @snailyt on Telegram.

Platform support

Operating system	Windows only (it uses WinHTTP, CNG, DPAPI and the Windows certificate store)
Compiler	Visual Studio 2022 or 2026, C++17 or newer
Architectures	x64 and Win32, Debug and Release
Runtime library	/MD and /MDd (the Visual Studio default)
Other platforms	Not available yet

What’s in the package

Path	What it is
eonauth/	The SDK: EonAuth.vcxproj (static library), EonAuth.props, include/ and src/
eonauth/include/eonauth.h	The only header your app includes
GUI Demo/	A Win32 app: password, key and free sign-in, a plan screen, upgrade with a key, session resume
main.cpp	A console demo using the blocking API
config.h	Your app’s constants, generated by the panel. Never commit a real one
demo_config.h	Turns config.h into an eonauth::Config

What it protects, and what it doesn’t

The SDK secures the connection and the protocol. Requests are encrypted, signed, replay-protected and sent only over a pinned TLS connection. Every response must carry an Ed25519 signature from EonAuth’s server, so nobody can stand up a fake server for your app, even with the keys pulled out of your binary.

It does not secure your binary. Anyone who controls the PC can patch out calls, attach a debugger and read memory, or run a modified copy. “The SDK checks passed” never means “this can’t be bypassed.”

So:

• Let the server decide. Bans, expiry, PC locks and revocation are all checked on the server.
• Make valuable features depend on something only the server hands out: tier-gated variables or files, not a local HasTier check alone.
• Anti-debugging, obfuscation and anti-VM are out of scope for the SDK.

Read Security model for the details.

Next

1. Install it in your Visual Studio solution.
2. Generate config.h in the panel.
3. Follow the Quickstart.