Hide chars field password

[link76]

I use this code to hide a field containing a password, but when I insert the @ or # characters are not hidden!

Code: Select all

on keyDown pKey
   if the length of me <= 10 then
      put "*" after me
      put pKey after fld "hidden_psw1"
   else
      // If there are 5 or more characters in the field
      // beep and prevent text entry
      //beep
   end if
end keyDown

[MaxV]

Try this:

Code: Select all

on keyUp
   lock screen
   set the imagesource the last char of me to 922
   unlock screen
end keyUp

[richmond62]

PASSWORDER.livecode.zip

(21.68 KiB) Downloaded 338 times

[richmond62]

If you "feel funny" about using numToCodePoint(9679) (black blob)

you can use numToCodePoint(8226) (standard Unicode Password obfuscation black blob)

you get this 'blob' if you type ALT/OPT 8 on a Macintosh.

[richmond62]

My example stack has two fields: the one an end-user might see on-screen showing blobs, and
an off-screen field that might end up containing the actual password for the stack to use.

The only real reason for the on-screen field is so that:

1. The end-user knows s/he has entered a sufficient number of characters.

2. The end-user gets a "warm fuzzy".

as from a programming point of view it is not necessary at all.

[link76]

how can I limit the length of the field?

on keyDown pKey
if the length of me >= 5 then
// If there are 5 or more characters in the field
// beep and prevent text entry
beep
else
pass keyDown
lock screen
put the last char of me after fld "hidden_psw1"
set the text of the last char of me to numToCodePoint(9679)
unlock screen
end if
end keyDown

[Klaus]

Hi friends,

the easiest was is to load one of the free TTF "Password" fonts from the net and use this for your password field. Add this to your standalone and "start using font file "path_to_password.ttf".


Best

Klaus

[bogs]

how can I limit the length of the field?

You might try

Code: Select all

get the number of chars of field "Entry" // your field...

and then something like

Code: Select all

if it > 5 then...

From the dictionary entry for 'characters'.

Interesting idea Klaus, I know nothing about that one.

[Klaus]

Trevor De Vore (the guy who created the datagrid!), supplies the TTF font and a nice lesson here:
http://revolution.screenstepslive.com/s ... word-field

[richmond62]

Surely a Password font simply consists of a font with a blob in every position: if so anyone with half a brain
only has to copy-paste the string somewhere else and change the font to see the password.

[Klaus]

Surely a Password font simply consists of a font with a blob in every position: if so anyone with half a brain
only has to copy-paste the string somewhere else and change the font to see the password.

Yes, and again, you, as a developer, have to prevent this, maybe by cathing the "pastekey".

[jacque]

I use this code to hide a field containing a password, but when I insert the @ or # characters are not hidden!

I just tested this on Mac OS X and it works fine with # and @. Those characters are hidden the same as any others.

[SparkOut]

Surely a Password font simply consists of a font with a blob in every position: if so anyone with half a brain
only has to copy-paste the string somewhere else and change the font to see the password.

Yes, and again, you, as a developer, have to prevent this, maybe by cathing the "pastekey".

Trevor's lesson linked above does include info related to preventing copy of the password field text. It is correct to think there is more to it than just changing the letters to identical blobs.

[Klaus]

...
Yes, and again, you, as a developer, have to prevent this, maybe by cathing the "pastekey".

Trevor's lesson linked above does include info related to preventing copy of the password field text. It is correct to think there is more to it than just changing the letters to identical blobs.

Yep, maybe I should have been writing: ...have to prevent this, maybe by reading Trevors above mentioned lesson.

[MaxV]

The ask password of livecode is not good enough?