separated Client from ClientCLI

src/client/client_internal.h

@@ -0,0 +1,36 @@
+#pragma once
+#include "client.h"
+#include "cryptography/AES.h"
+#include "cryptography/RSA.h"
+#include "network/encrypted_sockets.h"
+
+typedef struct ServerConnection ServerConnection;
+
+typedef struct Client {
+    str username;
+    Array(u8) user_data_key;
+    Array(u8) token;
+    ServerConnection* server_connection;
+} Client;
+
+
+typedef struct ServerConnection {
+    EndpointIPv4 server_end;
+    br_rsa_public_key server_pk;
+    RSAEncryptor rsa_enc;
+    u64 session_id;
+    Array(u8) session_key;
+    EncryptedSocketTCP sock;
+    str server_name;
+    str server_description;
+} ServerConnection;
+
+/// @param server_addr_cstr 
+/// @param server_pk_base64 public key encoded by `RSA_serializePublicKey_base64()`
+Result(ServerConnection*) ServerConnection_open(cstr server_addr_cstr, cstr server_pk_base64);
+void ServerConnection_close(ServerConnection* conn);
+
+/// updates conn->server_name
+Result(void) ServerConnection_requestServerName(ServerConnection* conn);
+/// updates conn->server_description
+Result(void) ServerConnection_requestServerDescription(ServerConnection* conn);