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For instance to call/wrap the auth.sentCode method (link below):
https://core.telegram.org/method/auth.sendCode
I have tried:
var url = "https://149.154.167.40";
var data = "(auth.sendCode \"PHONE_CODE+NO\" 0 APP_ID \"SECRET_HASH\" \"en\")";
using (var wc = new WebClient())
{
var result = wc.UploadData(url, GetBytes(data));
}
I get this exception (and inner exception)
The underlying connection was closed: An unexpected error occurred on a send. (Authentication failed because the remote party has closed the transport stream.)
502
In MTProto, the clients and the server authenticate messages by ensuring that SHA-256(auth_key_fragment + plaintext + padding) = msg_key and that the plaintext always contains message length, server salt, session_id and other data not known to a potential attacker before accepting any message.
Telegram uses a custom build symmetric encryption scheme called MTProto. The protocol was developed by Nikolai Durov and other developers at Telegram and is based on 256-bit symmetric AES encryption, 2048-bit RSA encryption and Diffie–Hellman key exchange.
MTProto is the Telegram Messenger protocol "designed for access to a server API from applications running on mobile devices".
You an get started with this SO post
You would need to understand how to generate an AuthKey first.
The Telegram-API documentation is not very well written, but if you keep studying it... you eventually get the hand of it.
Working through generating the AuthKey would help you build up a pattern and functions that you can then use to tackle the rest of the API
Cheers.
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