Long passphrases are truncated on Unix-like by default

[hakavlad]

Linux and macOS terminal emulators TRUNCATE input to 4095. Windows - not. This problem is a bit similar to the one we discussed recently.
https://stackoverflow.com/questions/18015137/linux-terminal-input-reading-user-input-from-terminal-truncating-lines-at-4095

In Linux, the command

$ stty -icanon   # Disable canonical mode.

disables the input truncation.

Possible solution:
Truncate passphrases to 2048 bytes to ensure crossplatform compatibility.
(and warn users that very long phrases will be truncated for compatibility)

[samuel-lucas6]

That's an interesting point. This will need some testing. I should've restricted them to 128 characters like in Cahir because there's no reason to use excessively long passphrases. Fortunately, nobody should realistically be affected by this.

[samuel-lucas6]

I quickly tested this on a Debian distro and the macOS Terminal, and there was no problem for both -p:"password" and -p.

[hakavlad]

Sorry, I didn't test this with Kryptor before reporting the issue. Kryptor is getting untruncated input for some reason. The issue has been identified and is specific to Python and getpass.getpass().
age also needs to be checked.

[hakavlad]

It looks like age has this problem. More testing is needed.