Add a change password option to xiloader.

This works by using the same login flow from before to validate the
correct user. However instead of returning to connect to the game
server, the user is prompted for a new password to set.

I tested all code paths manually: error cases and succesful password
changing cases.

fixed DarkstarProject#7

xiloader/network.cpp

@@ -227,16 +227,19 @@ namespace xiloader
             xiloader::console::output("What would you like to do?");
             xiloader::console::output("   1.) Login");
             xiloader::console::output("   2.) Create New Account");
+            xiloader::console::output("   3.) Change Account Password");
             xiloader::console::output("==========================================================");
             printf("\nEnter a selection: ");
 
             std::string input;
             std::cin >> input;
             std::cout << std::endl;
 
-            /* User wants to log into an existing account.. */
-            if (input == "1")
+            /* User wants to log into an existing account or modify an existing account's password. */
+            if (input == "1" || input == "3")
             {
+                if (input == "3")
+                    xiloader::console::output("Before resetting your password, first verify your account details.");
                 xiloader::console::output("Please enter your login information.");
                 std::cout << "\nUsername: ";
                 std::cin >> g_Username;
@@ -265,7 +268,8 @@ namespace xiloader
                 }
                 std::cout << std::endl;
 
-                sendBuffer[0x20] = 0x10;
+                char event_code = (input == "1") ? 0x10 : 0x30;
+                sendBuffer[0x20] = event_code;
             }
             /* User wants to create a new account.. */
             else if (input == "2")
@@ -275,6 +279,7 @@ namespace xiloader
                 std::cout << "\nUsername (3-15 characters): ";
                 std::cin >> g_Username;
                 std::cout << "Password (6-15 characters): ";
+                g_Password.clear();
                 std::cin >> g_Password;
                 std::cout << "Repeat Password           : ";
                 std::cin >> input;
@@ -333,6 +338,57 @@ namespace xiloader
             closesocket(sock->s);
             sock->s = INVALID_SOCKET;
             return false;
+
+        case 0x0005: // Request for updated password to change to.
+        {
+            xiloader::console::output(xiloader::color::success, "Log in verified for user %s.", g_Username.c_str());
+            std::string confirmed_password = "";
+            do
+            {
+                std::cout << "Enter new password (6-15 characters): ";
+                g_Password.clear();
+                std::cin >> g_Password;
+                std::cout << "Repeat Password           : ";
+                std::cin >> confirmed_password;
+                std::cout << std::endl;
+
+                if (g_Password != confirmed_password)
+                {
+                    xiloader::console::output(xiloader::color::error, "Passwords did not match! Please try again.");
+                }
+            } while (g_Password != confirmed_password);
+
+            /* Clear the buffers */
+            memset(sendBuffer, 0, 33);
+            memset(recvBuffer, 0, 16);
+
+            /* Copy the new password into the buffer. */
+            memcpy(sendBuffer, g_Password.c_str(), 16);
+
+            /* Send info to server and obtain response.. */
+            send(sock->s, sendBuffer, 16, 0);
+            recv(sock->s, recvBuffer, 16, 0);
+
+            /* Handle the final result. */
+            switch (recvBuffer[0])
+            {
+            case 0x0006: // Success (Changed Password)
+                xiloader::console::output(xiloader::color::success, "Password updated successfully!");
+                std::cout << std::endl;
+                g_Password.clear();
+                closesocket(sock->s);
+                sock->s = INVALID_SOCKET;
+                return false;
+
+            case 0x0007: // Error (Changed Password)
+                xiloader::console::output(xiloader::color::error, "Failed to change password.");
+                std::cout << std::endl;
+                g_Password.clear();
+                closesocket(sock->s);
+                sock->s = INVALID_SOCKET;
+                return false;
+            }
+        }
         }
 
         /* We should not get here.. */