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DoorKeeper
Warning
May contain traces of software.
Hardware
https://www.wemos.cc/product/d1.html
https://en.wikipedia.org/wiki/ESP8266
Software
https://github.com/esp8266/Arduino
Dependencies (Arduino Libraries)
CRC32
https://github.com/bakercp/CRC32/
Crypto
https://github.com/rweather/arduinolibs/tree/master/libraries/Crypto
Sign & verify
Ed25519 https://en.wikipedia.org/wiki/Ed25519
Session key
Curve25519 https://en.wikipedia.org/wiki/Curve25519
Stream Cipher
ChaCha20 https://en.wikipedia.org/wiki/ChaCha20
ESP8266 hacked version of Crypto libs
use internal esp8266 hardware random generator
http://esp8266-re.foogod.com/wiki/Random_Number_Generator
https://github.com/kollera/arduinolibs
NTP
https://github.com/Juppit/esp8266-SNTPClock
Project
What is it all about?
An attempt to enable secure communication, authentication & authorization for my ESP8266 project.
Some details
Take a look here
FAQ
Why dont use SSL/TLS?
When i started my project, TLS for Arduino was not available (to be precise, it was, but not in a stable version).
Whats the advantage of your solution?
No idea. It's this public - private - elliptic - curve - stream - cipher ... thing. For details, ask the NSA!
Do you know how ECDH works?
No. But Wikipedia does.
https://en.wikipedia.org/wiki/Elliptic_curve_Diffie%E2%80%93Hellman
Do you know how StreamCipher works?
No. But Wikipedia does.
https://en.wikipedia.org/wiki/Stream_cipher
Your code looks kind of messy.
Yes, thats right!
I found a bug / I know how to improve your code.
Excellent! Please use the bugtracker