Subject: Re: bug#35540: Installer displays encrypted partition password entry in cleartext

From: Mathieu Othacehe <[email-masked]>
Date: Sun, 05 May 2019 13:04:03 +0200

Hello,

> #2 would please everybody, but I do not know what widgets Newt
> provides for this.  Mathieu, would you know if changing the
> visibility with e.g. a checkbox is doable?

You'll find a patch attached that adds a checkbox to toggle password
hiding. Every password input now has such a checkbox, WDYT?

Thanks,

Mathieu
From fba1d82b2e27917a5efef339b326fe2d98e62bc0 Mon Sep 17 00:00:00 2001
From: Mathieu Othacehe <[email-masked]>
Date: Sun, 5 May 2019 12:54:40 +0200
Subject: [PATCH] installer: Add password 'hide' checkbox.

* gnu/installer/newt/page.scm (run-input-page)[input-hide-checkbox?]: New
parameter adding a checkbox to toggle password hiding. By default, the
checkbox is active and the password is hence hided.
* gnu/installer/newt/partition.scm (prompt-luks-passwords): Enable the
previous parameter on both password input pages.
* gnu/installer/newt/user.scm (run-root-password-page): Enable the previous
parameter,
(confirm-password): ditto,
(run-user-add-page): add a checkbox to toggle password hiding.
---
 gnu/installer/newt/page.scm      | 34 +++++++++++++++++++++++---------
 gnu/installer/newt/partition.scm |  9 +++------
 gnu/installer/newt/user.scm      | 22 ++++++++++++++++++---
 3 files changed, 47 insertions(+), 18 deletions(-)

diff --git a/gnu/installer/newt/page.scm b/gnu/installer/newt/page.scm
index 8a32c403df..4645486ff7 100644
--- a/gnu/installer/newt/page.scm
+++ b/gnu/installer/newt/page.scm
@@ -75,6 +75,7 @@ this page to TITLE."
                          #:key
                          (allow-empty-input? #f)
                          (default-text #f)
+                         (input-hide-checkbox? #f)
                          (input-field-width 40)
                          (input-flags 0))
   "Run a page to prompt user for an input. The given TEXT will be displayed
@@ -86,22 +87,37 @@ input box, such as FLAG-PASSWORD."
           (make-reflowed-textbox -1 -1 text
                                  input-field-width
                                  #:flags FLAG-BORDER))
-         (grid (make-grid 1 3))
+         (input-visible-cb
+          (make-checkbox -1 -1 (G_ "Hide") #\x "x "))
+         (input-flags* (if input-hide-checkbox?
+                           (logior FLAG-PASSWORD input-flags)
+                           input-flags))
          (input-entry (make-entry -1 -1 20
-                                  #:flags input-flags))
+                                  #:flags input-flags*))
          (ok-button (make-button -1 -1 (G_ "OK")))
+         (grid (vertically-stacked-grid
+                GRID-ELEMENT-COMPONENT text-box
+                GRID-ELEMENT-SUBGRID
+                (apply
+                 horizontal-stacked-grid
+                 GRID-ELEMENT-COMPONENT input-entry
+                 `(,@(if input-hide-checkbox?
+                         (list GRID-ELEMENT-COMPONENT input-visible-cb)
+                         '())))
+                GRID-ELEMENT-COMPONENT ok-button))
          (form (make-form)))
 
+    (add-component-callback
+     input-visible-cb
+     (lambda (component)
+       (set-entry-flags input-entry
+                        FLAG-PASSWORD
+                        FLAG-ROLE-TOGGLE)))
+
     (when default-text
       (set-entry-text input-entry default-text))
 
-    (set-grid-field grid 0 0 GRID-ELEMENT-COMPONENT text-box)
-    (set-grid-field grid 0 1 GRID-ELEMENT-COMPONENT input-entry
-                    #:pad-top 1)
-    (set-grid-field grid 0 2 GRID-ELEMENT-COMPONENT ok-button
-                    #:pad-top 1)
-
-    (add-components-to-form form text-box input-entry ok-button)
+    (add-form-to-grid grid form #t)
     (make-wrapped-grid-window grid title)
     (let ((error-page (lambda ()
                         (run-error-page (G_ "Please enter a non empty input.")
diff --git a/gnu/installer/newt/partition.scm b/gnu/installer/newt/partition.scm
index 3fb6c5079e..ecf241b8e2 100644
--- a/gnu/installer/newt/partition.scm
+++ b/gnu/installer/newt/partition.scm
@@ -153,21 +153,18 @@ USER-PARTITIONS list. Return this list with password fields filled-in."
                 (file-name (user-partition-file-name user-part))
                 (password-page
                  (lambda ()
-                   ;; Note: Don't use FLAG-PASSWORD here because this is the
-                   ;; first bit of text that the user types in, so it's
-                   ;; probably safer if they can see that the keyboard layout
-                   ;; they chose is in effect.
                    (run-input-page
                     (format #f (G_ "Please enter the password for the \
 encryption of partition ~a (label: ~a).") file-name crypt-label)
-                    (G_ "Password required"))))
+                    (G_ "Password required")
+                    #:input-hide-checkbox? #t)))
                 (password-confirm-page
                  (lambda ()
                    (run-input-page
                     (format #f (G_ "Please confirm the password for the \
 encryption of partition ~a (label: ~a).") file-name crypt-label)
                     (G_ "Password confirmation required")
-                    #:input-flags FLAG-PASSWORD))))
+                    #:input-hide-checkbox? #t))))
            (if crypt-label
                (let loop ()
                  (let ((password (password-page))
diff --git a/gnu/installer/newt/user.scm b/gnu/installer/newt/user.scm
index deab056e0c..6aa103aa5a 100644
--- a/gnu/installer/newt/user.scm
+++ b/gnu/installer/newt/user.scm
@@ -51,9 +51,11 @@ REAL-NAME, and HOME-DIRECTORY as the initial values in the form."
                                       #:initial-value real-name))
          (entry-home-directory (make-entry -1 -1 entry-width
                                            #:initial-value home-directory))
+         (password-visible-cb
+          (make-checkbox -1 -1 (G_ "Hide") #\x "x "))
          (entry-password (make-entry -1 -1 entry-width
                                      #:flags FLAG-PASSWORD))
-         (entry-grid (make-grid 2 5))
+         (entry-grid (make-grid 3 5))
          (button-grid (make-grid 1 1))
          (ok-button (make-button -1 -1 (G_ "OK")))
          (grid (make-grid 1 2))
@@ -71,6 +73,12 @@ REAL-NAME, and HOME-DIRECTORY as the initial values in the form."
     (set-entry-grid-field 0 3 label-password)
     (set-entry-grid-field 1 3 entry-password)
 
+    (set-grid-field entry-grid
+                    2 3
+                    GRID-ELEMENT-COMPONENT
+                    password-visible-cb
+                    #:pad-left 1)
+
     (set-grid-field button-grid 0 0 GRID-ELEMENT-COMPONENT ok-button)
 
     (add-component-callback
@@ -83,11 +91,19 @@ REAL-NAME, and HOME-DIRECTORY as the initial values in the form."
          (set-entry-text entry-real-name
                          (string-titlecase (entry-value entry-name))))))
 
+    (add-component-callback
+     password-visible-cb
+     (lambda (component)
+       (set-entry-flags entry-password
+                        FLAG-PASSWORD
+                        FLAG-ROLE-TOGGLE)))
+
     (add-components-to-form form
                             label-name label-real-name
                             label-home-directory label-password
                             entry-name entry-real-name
                             entry-home-directory entry-password
+                            password-visible-cb
                             ok-button)
 
     (make-wrapped-grid-window (vertically-stacked-grid
@@ -136,7 +152,7 @@ a thunk, if the confirmation doesn't match PASSWORD, and return its result."
     (run-input-page (G_ "Please confirm the password.")
                     (G_ "Password confirmation required")
                     #:allow-empty-input? #t
-                    #:input-flags FLAG-PASSWORD))
+                    #:input-hide-checkbox? #t))
 
   (if (string=? password confirmation)
       password
@@ -153,7 +169,7 @@ a thunk, if the confirmation doesn't match PASSWORD, and return its result."
     (run-input-page (G_ "Please choose a password for the system \
 administrator (\"root\").")
                     (G_ "System administrator password")
-                    #:input-flags FLAG-PASSWORD))
+                    #:input-hide-checkbox? #t))
 
   (confirm-password password run-root-password-page))
 
-- 
2.17.1