diff --git a/TODO.md b/TODO.md
index d1055a9..6550923 100644
--- a/TODO.md
+++ b/TODO.md
@@ -1,8 +1,9 @@
 # TODO:
 
 ## Current:
+- [ ] Login and registration error
 - [ ] PageUp/PageDown key functionality in lists
-- [ ] File upload multiline description
+- [ ] File upload multiline description (window)
 - [ ] Permission checkboxes for file upload/edit
 - [ ] More intuitive navigation between nested groups (by pressing left and right buttons)
 
diff --git a/src/draw_modal.c b/src/draw_modal.c
index eb94c42..72bc1bb 100644
--- a/src/draw_modal.c
+++ b/src/draw_modal.c
@@ -36,19 +36,7 @@ void app_draw_modal(app_t *app) {
     case S_UPLOAD_PARAMS:
       init_upload_props_dialogue_modal(app);
       break;
-    case WAIT_SERVER_INIT:
-    case WAIT_SERVER:
-    case WAIT_REGISTER:
-    case WAIT_REGISTER_CONFIRMATION:
-    case WAIT_CLIENT:
-    case S_FILE_LIST:
-    case S_FILE_SELECT:
-    case S_UPLOAD_REQUESTED:
-    case S_ASK_USER_BEFORE_LOGIN:
-    case S_ERR:
-    case S_WAIT_SERVER:
-    case S_N_D:
-    case S_NEXT_ACTION:
+    default:
       if (app->query_args->notification != NULL) {
         init_notification_modal(app);
       } else {
diff --git a/src/modals/upload_props_dialogue.c b/src/modals/upload_props_dialogue.c
index 1b4ba46..7b3f8bb 100644
--- a/src/modals/upload_props_dialogue.c
+++ b/src/modals/upload_props_dialogue.c
@@ -1,11 +1,12 @@
 #include "group.h"
-#include <widget.h>
+#include "widget_core.h"
 #include <ncursesw/ncurses.h>
 #include <stdint.h>
 #include <stdio.h>
 #include <stdlib.h>
 #include <string.h>
 #include <unistd.h>
+#include <widget.h>
 
 void upload_props_dialogue_modal_cb(callback_args_t *args) {
   callback_args_t d_args;
@@ -18,9 +19,10 @@ void upload_props_dialogue_modal_cb(callback_args_t *args) {
   char query[256];
   int32_t query_len = 0;
   input_t *desc_input = (input_t *)d->g_content->elements[0].element;
+  /* TODO: permissions */
   if (d_args.resp_data.code == cbrp_val) {
     switch (d_args.resp_data.val.val.num) {
-    case 0:
+    case 1:
       query_len =
           sprintf(query, "file upload \"%s\" %zu 1\n",
                   app->query_args->file->name, app->query_args->file->size);
@@ -31,7 +33,7 @@ void upload_props_dialogue_modal_cb(callback_args_t *args) {
       app->query_args->state = S_UPLOAD_REQUESTED;
       write(app->query_args->sd, query, query_len);
       break;
-    case 1:
+    case 2:
       if (app->query_args->file->name != NULL)
         free(app->query_args->file->name);
       if (app->query_args->file->path != NULL)
@@ -48,12 +50,15 @@ dialogue_t *init_upload_props_dialogue_modal(app_t *app) {
   if (app == NULL)
     return NULL;
   group_el_init_t content[] = {
-      {.type = w_input, .label = "File description", .length = 30},
+      {.type = w_checkbox, .label = "Visible for all", .is_default = true},
+      {.type = w_checkbox,
+       .label = "Visible for registered",
+       .is_default = false},
       {.type = w_end}};
 
   group_el_init_t actions[] = {
-      {.type = w_button, .label = "Upload", .is_default = true},
-      {.type = w_button, .label = "Cancel", .is_default = false},
+      {.type = w_button, .label = "Upload", .is_default = false, .val.num = 1},
+      {.type = w_button, .label = "Cancel", .is_default = false, .val.num = 2},
       {.type = w_end},
   };
 
@@ -63,8 +68,10 @@ dialogue_t *init_upload_props_dialogue_modal(app_t *app) {
   dialogue_t *d = &(app->modal);
 
   d->w.callback = upload_props_dialogue_modal_cb;
-  d->g_content = init_group(&(d->win), &(d->w), content, &(d->id_map), horizontal, g_content);
-  d->g_action = init_group(&(d->win), &(d->w), actions, &(d->id_map), horizontal, g_action);
+  d->g_content = init_group(&(d->win), &(d->w), content, &(d->id_map),
+                            horizontal, g_content);
+  d->g_action = init_group(&(d->win), &(d->w), actions, &(d->id_map),
+                           horizontal, g_action);
 
   app->query_args->active_dialogue = d;
 
diff --git a/src/query.c b/src/query.c
index e0864dd..2807d5c 100644
--- a/src/query.c
+++ b/src/query.c
@@ -45,10 +45,8 @@ void query_loop(app_t *app) {
   size_t qlen;
   int sr;
   static file_args_t file_args;
-  callback_args_t d_args = {.app = app,
-                            .element = NULL,
-                            .data = NULL,
-                            .resp_data.code = cbrc_none};
+  callback_args_t d_args = {
+      .app = app, .element = NULL, .data = NULL, .resp_data.code = cbrc_none};
 
   init_file_args(&file_args);
   query_args->sd = sd;
@@ -183,12 +181,7 @@ int process_query(app_t *app) {
   case WAIT_REGISTER:
     wait_register(query_args);
     break;
-  case S_ASK_SEVER_IP:
-  case S_ASK_LOGIN_TYPE:
-  case S_N_D:
-  case S_ASK_LOGIN_USER:
-  case S_PRINT_SERVER_MESSAGE:
-  case S_UPLOAD_FILE_SELECT:
+  default:
     break;
   }
   return 0;
diff --git a/src/server.c b/src/server.c
index 150beb8..a6fd9a9 100644
--- a/src/server.c
+++ b/src/server.c
@@ -62,13 +62,13 @@ int process_server_command(char *line, int l_len, app_t *app) {
   }
 
   /* LOGIN AGAIN */
-  if (!strncmp(line, "login_again>", ws_pos)) {
+  if (!strncmp(line, "login_again>\n", ws_pos)) {
+    alert("Incorrect credentials! Try again");
     free(params->uname);
     free(params->pass);
     params->uname = NULL;
     params->pass = NULL;
-    // get_missing_params(params);
-    write(q_args->sd, params->uname, strlen(params->uname));
+    q_args->state = S_ASK_LOGIN_USER;
     return 0;
   }
 
diff --git a/src/widget/button.h b/src/widget/button.h
index aacb19d..57d49d2 100644
--- a/src/widget/button.h
+++ b/src/widget/button.h
@@ -6,7 +6,7 @@
 
 typedef struct {
   widget_t w;
-  char hotkey;
+  int32_t hotkey;
   uint32_t is_disabled : 1;
 } button_t;
 
diff --git a/src/widget/checkbox.c b/src/widget/checkbox.c
new file mode 100644
index 0000000..1890642
--- /dev/null
+++ b/src/widget/checkbox.c
@@ -0,0 +1,68 @@
+#include <ncursesw/ncurses.h>
+#include <stdint.h>
+#include <stdlib.h>
+#include <string.h>
+
+#include "app.h"
+#include "checkbox.h"
+#include <widget_core.h>
+
+bool checkbox_default_key_action(callback_args_t *args) {
+  int32_t key = *((int32_t *)args->data);
+  group_el_t *g_el = args->active_el;
+  checkbox_t *cbx = g_el->element;
+  switch (key) {
+  case '\40':
+    cbx->value = !cbx->value;
+    break;
+  default:
+    break;
+  }
+  return true;
+}
+
+checkbox_t *init_checkbox(WINDOW **win, widget_t *w_parent, char *label) {
+  checkbox_t *cbx = malloc(sizeof(checkbox_t));
+  init_widget(&(cbx->w), w_parent, win, label);
+  cbx->is_disabled = false;
+  cbx->value = false;
+  cbx->w.sz.x = strlen(cbx->w.title) + 4; // + "[ ] "
+  cbx->w.sz.y = 1;
+  cbx->w.cur.y = 0;
+  cbx->w.cur.x = 1;
+  return cbx;
+}
+
+int32_t draw_checkbox(checkbox_t *cbx, uint32_t active_id) {
+  char title[DIALOGUE_TITLE + 6];
+  WINDOW *win = *(cbx->w.parent_win);
+  uint32_t margin_y = cbx->w.ps.y + cbx->w.m.y;
+  uint32_t margin_x = cbx->w.ps.x + cbx->w.m.x;
+
+  widget_t *w_par = cbx->w.w_parent;
+
+  while (w_par->parent_win == cbx->w.parent_win) {
+    margin_y += w_par->ps.y;
+    margin_x += w_par->ps.x;
+    w_par = w_par->w_parent;
+  }
+
+  char val = cbx->value ? 'x' : ' ';
+
+  if (cbx->w.id == active_id) {
+    sprintf(title, "[%c] %s", val, cbx->w.title);
+    wattrset(win, COLOR_PAIR(modal_color_pair) | A_BOLD | A_REVERSE);
+  } else {
+    sprintf(title, "[%c] %s", val, cbx->w.title);
+    wattrset(win, COLOR_PAIR(0) | A_REVERSE);
+  }
+
+  mvwprintw(win, margin_y, margin_x, "%s", title);
+  cbx->w.cur.y = margin_y;
+  cbx->w.cur.x = margin_x + 1;
+
+  wattroff(win, A_BOLD | A_REVERSE);
+  return strlen(title);
+}
+
+void destroy_checkbox(checkbox_t *btn) { free(btn); }
\ No newline at end of file
diff --git a/src/widget/checkbox.h b/src/widget/checkbox.h
new file mode 100644
index 0000000..60db01d
--- /dev/null
+++ b/src/widget/checkbox.h
@@ -0,0 +1,17 @@
+#ifndef CHECKBOX_H
+#define CHECKBOX_H
+
+#include <widget_core.h>
+#include <stdint.h>
+
+typedef struct {
+  widget_t w;
+  bool is_disabled;
+  bool value;
+} checkbox_t;
+
+bool checkbox_default_key_action(callback_args_t *args);
+checkbox_t *init_checkbox(WINDOW **win, widget_t *w_parent, char *label);
+int32_t draw_checkbox(checkbox_t *cbx, uint32_t active_id);
+void destroy_checkbox(checkbox_t *cbx);
+#endif
diff --git a/src/widget/dialogue.c b/src/widget/dialogue.c
index dc678b2..7f50656 100644
--- a/src/widget/dialogue.c
+++ b/src/widget/dialogue.c
@@ -4,6 +4,8 @@
 #include <sys/types.h>
 
 #include "app.h"
+#include "button.h"
+#include "checkbox.h"
 #include "dialogue.h"
 #include "file_list.h"
 #include "group.h"
@@ -193,14 +195,14 @@ void dialogue_init_active_id(dialogue_t *dialogue) {
 
 #define DETECT_GROUP_SIZE(group, line_max_len, y, x)                           \
   if (group) {                                                                 \
-    group->w.ps.y = y;                                                          \
-    if (line_max_len < group->w.sz.x) {                                           \
-      line_max_len = group->w.sz.x;                                               \
-      group->w.ps.x = 0;                                                        \
+    group->w.ps.y = y;                                                         \
+    if (line_max_len < group->w.sz.x) {                                        \
+      line_max_len = group->w.sz.x;                                            \
+      group->w.ps.x = 0;                                                       \
     } else {                                                                   \
-      group->w.ps.x = (line_max_len - group->w.sz.x) / 2;                          \
+      group->w.ps.x = (line_max_len - group->w.sz.x) / 2;                      \
     }                                                                          \
-    y += group->w.sz.y;                                                           \
+    y += group->w.sz.y;                                                        \
   }
 
 int32_t draw_dialogue(dialogue_t *d) {
@@ -275,11 +277,11 @@ int32_t draw_dialogue(dialogue_t *d) {
   }
 
   /* move cursor */
-  if (d->active_el != NULL && d->active_el->type == w_input) {
-    input_t *input = d->active_el->element;
-    d->w.cur.y = input->w.cur.y;
-    d->w.cur.x = input->w.cur.x + input->value_len;
-    d->w.cur.x -= input->cur_pos;
+  if (d->active_el != NULL &&
+      (d->active_el->type == w_input || d->active_el->type == w_checkbox)) {
+    widget_t *w = d->active_el->element;
+    d->w.cur.y = w->cur.y;
+    d->w.cur.x = w->cur.x;
     if (d->w.cur.y || d->w.cur.x) {
       wmove(d->win, d->w.cur.y, d->w.cur.x);
       curs_set(true);
diff --git a/src/widget/group.c b/src/widget/group.c
index bc8f98b..cd70423 100644
--- a/src/widget/group.c
+++ b/src/widget/group.c
@@ -1,5 +1,6 @@
 #include "group.h"
 #include "button.h"
+#include "checkbox.h"
 #include "d_array.h"
 #include "fs_file_list.h"
 #include "input.h"
@@ -12,51 +13,31 @@
 #include <sys/types.h>
 #include <utils.h>
 
+bool group_default_key_action(callback_args_t *args) {
+  group_el_t *element = args->active_el;
+  switch (element->type) {
+  case w_input:
+    return input_default_key_action(args);
+  case w_checkbox:
+    return checkbox_default_key_action(args);
+  default:
+    return false;
+  }
+}
+
 void group_default_callback(callback_args_t *args) {
-  group_t *g = (group_t *)args->element;
   int32_t key = *((int32_t *)args->data);
-  int64_t response = args->resp_data.val.val.num;
-  input_t *input;
   widget_t *widget;
   group_el_t *element_ptr = args->active_el;
-  u_int32_t start_pos = 0;
   callback_args_t new_args;
   switch (key) {
   case '\n': /* Enter */
     args->resp_data.code = cbrp_val;
     mempcpy(&(args->resp_data.val), &(element_ptr->val), sizeof(struct val_t));
-    break;
-  case KEY_BACKSPACE:
-  case KEY_DL:
-    if (element_ptr->type == w_input) {
-      input = (input_t *)element_ptr->element;
-      if (input->value_len) {
-        if (input->cur_pos > 0) {
-          start_pos = input->value_len-- - input->cur_pos;
-          memmove(input->value + start_pos - 1, input->value + start_pos,
-                  input->value_len - start_pos + 2);
-        } else {
-          input->value[--input->value_len] = '\0';
-        }
-      }
-    }
-    args->resp_data.code = cbrc_none;
+
     break;
   default:
-    if (element_ptr->type == w_input) {
-      input = (input_t *)element_ptr->element;
-      if (input->max_len > input->value_len) {
-        if (input->cur_pos > 0) {
-          start_pos = input->value_len++ - input->cur_pos;
-          memmove(input->value + start_pos + 1, input->value + start_pos,
-                  input->value_len - start_pos);
-          input->value[start_pos] = key;
-        } else {
-          input->value[input->value_len++] = key;
-          input->value[input->value_len] = '\0';
-        }
-      }
-    } else {
+    if (!group_default_key_action(args)) {
       /* callback case */
       widget = (widget_t *)element_ptr->element;
       if (widget->callback != NULL) {
@@ -145,6 +126,10 @@ group_t *init_group(WINDOW **win, widget_t *w_parent, group_el_init_t *children,
       elements[i].element = init_fs_file_list(win, &(group->w));
       w = &(((ui_progress_bar_t *)elements[i].element)->w);
       break;
+    case w_checkbox:
+      elements[i].element = init_checkbox(win, &(group->w), children[i].label);
+      w = &(((checkbox_t *)elements[i].element)->w);
+      break;
     }
     if (current.type != w_group) {
       if (i == 0) {
@@ -202,6 +187,9 @@ void draw_group(WINDOW *win, group_t *group, int32_t active_id) {
     case w_fs_file_list:
       draw_fs_file_list((ui_fs_file_list_t *)el->element);
       break;
+    case w_checkbox:
+      draw_checkbox((checkbox_t *)el->element, active_id);
+      break;
     }
   }
 }
@@ -229,6 +217,9 @@ void destroy_group(group_t *group) {
     case w_fs_file_list:
       destroy_fs_file_list(el->element);
       break;
+    case w_checkbox:
+      destroy_checkbox(el->element);
+      break;
     }
   }
   if (group->elements != NULL) {
diff --git a/src/widget/input.c b/src/widget/input.c
index e8c5ea9..589aaca 100644
--- a/src/widget/input.c
+++ b/src/widget/input.c
@@ -7,13 +7,49 @@
 #include "input.h"
 #include <widget_core.h>
 
+bool input_default_key_action(callback_args_t *args) {
+  int32_t key = *((int32_t *)args->data);
+  group_el_t *g_el = args->active_el;
+  input_t *input = g_el->element;
+  int64_t start_pos = 0;
+
+  switch (key) {
+  case KEY_BACKSPACE:
+  case KEY_DL:
+    if (input->value_len) {
+      if (input->cur_pos > 0) {
+        start_pos = input->value_len-- - input->cur_pos;
+        memmove(input->value + start_pos - 1, input->value + start_pos,
+                input->value_len - start_pos + 2);
+      } else {
+        input->value[--input->value_len] = '\0';
+      }
+    }
+    break;
+  default:
+    if (input->cur_pos > 0) {
+      start_pos = input->value_len++ - input->cur_pos;
+      memmove(input->value + start_pos + 1, input->value + start_pos,
+              input->value_len - start_pos);
+      input->value[start_pos] = key;
+    } else {
+      input->value[input->value_len++] = key;
+      input->value[input->value_len] = '\0';
+    }
+    break;
+  }
+  args->resp_data.code = cbrc_none;
+  return true;
+}
+
 input_t *init_input(WINDOW **win, widget_t *w_parent, char *label,
                     uint32_t length, uint32_t is_hidden_value) {
   input_t *input = malloc(sizeof(input_t));
   init_widget(&(input->w), w_parent, win, label);
   input->is_disabled = 0;
-  input->w.sz.y = 3;          // with borders
-  input->w.sz.x = length + 3; // with borders and extra space for the last element
+  input->w.sz.y = 3; // with borders
+  input->w.sz.x =
+      length + 3; // with borders and extra space for the last element
   uint32_t t_len = strlen(input->w.title) + 4; // with borders and space
   if (input->w.sz.x < t_len)
     input->w.sz.x = t_len;
@@ -70,15 +106,15 @@ int32_t draw_input(input_t *input, uint32_t active_id) {
   }
 
   if (input->is_hidden) {
-    mvwprintw(win, pos_y + 1, pos_x, "%.*s%*s", (int)input->value_len,
-              stars, (int)(input->w.sz.x - input->value_len - 2), "");
+    mvwprintw(win, pos_y + 1, pos_x, "%.*s%*s", (int)input->value_len, stars,
+              (int)(input->w.sz.x - input->value_len - 2), "");
   } else {
     mvwprintw(win, pos_y + 1, pos_x, "%s%*s", input->value,
               (int)(input->w.sz.x - input->value_len - 2), "");
   }
 
   input->w.cur.y = pos_y + 1;
-  input->w.cur.x = pos_x;
+  input->w.cur.x = pos_x + input->value_len - input->cur_pos;
 
   wattroff(win, A_BOLD | A_REVERSE);
   return 0;
diff --git a/src/widget/input.h b/src/widget/input.h
index 54b2707..4fcfe2a 100644
--- a/src/widget/input.h
+++ b/src/widget/input.h
@@ -15,6 +15,7 @@ typedef struct {
   bool is_hidden;
 } input_t;
 
+bool input_default_key_action(callback_args_t *args);
 input_t *init_input(WINDOW **win, widget_t *w_parent, char *label,
                     uint32_t size, uint32_t is_hidden_value);
 int32_t draw_input(input_t *input, uint32_t active_id);
diff --git a/src/widget/widget.h b/src/widget/widget.h
index 2d7bb7a..68ff5a8 100644
--- a/src/widget/widget.h
+++ b/src/widget/widget.h
@@ -8,4 +8,5 @@
 #include "group.h"
 #include "input.h"
 #include "progress_bar.h"
+#include "checkbox.h"
 #endif
\ No newline at end of file
diff --git a/src/widget_core/widget_core.h b/src/widget_core/widget_core.h
index 7e81ee5..c172c97 100644
--- a/src/widget_core/widget_core.h
+++ b/src/widget_core/widget_core.h
@@ -18,6 +18,7 @@ enum w_type {
   w_box,
   w_group,
   w_input,
+  w_checkbox,
   w_progress,
   w_fs_file_list,
 };