TAB at EOL (GPG and PGP interoperability)
Fri Jan 10 00:08:02 2003
>Date: Thu, 9 Jan 2003 16:56:16 -0500
>From: David Shaw <firstname.lastname@example.org>
>Subject: Re: TAB at EOL (GPG and PGP interoperability)
>On Thu, Jan 09, 2003 at 12:02:04PM -0800, Knut Forkalsrud wrote:
> I'm using GPG version 1.2.1 and some files signed using PGP 7.0.4 have
> caused problems. It turns out that the problem files have trailing
> TAB characters on some lines. All PGP versions I have tried can
> verify the signature easily, but GPG insists it's a BAD signature.
>This is a bug in PGP. The OpenPGP standard dictates that "...any
>trailing whitespace (spaces, and tabs, 0x09) at the end of any line is
>ignored when the cleartext signature is calculated." PGP only ignores
>spaces and includes tabs.
is it a 'bug' or a 'feature' ? ;^)
it is sort-of improbable that the files Kurt was referring to just had
'tabs' added onto the end .
it is more likely that some of the plaintext was arranged in columns like:
and then, after pgp 'wrapping'(or e-mail wrapping), the character at the end of the line,
got transferred to the beginning of the next line, leaving a TAB to end the line, but not as intentional trailing space
it would seem reasonable to think about either preventing 'wrapping'
from doing this,
or allowing gnupg to accept it
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