Windows IPC (was: Pb decrypting with PGP 6.5.3 and GnuPG)

Mr Griffon griffon9 at
Sun Sep 3 09:42:38 CEST 2000

>BTW, we are working on GPA and this runs also as a native Windows
>program.  However, there are quite a lot of things we have still to do
>( and we do not need legal papers for GPA.

I've been following GPA from time to time, but it's not ready yet for prime 
time and I'm not very good at C (and there's no binary snapshot either), so 
I decided to code my own GUI in Delphi instead (which is a matter of minutes 
once the GnuPG interfacing code is done).

> > found out that the current version of GnuPG for Windows has absolutely 
> > way of getting the secret key password from another program. This means
>I have not yet implemented it but for other reasons (see below) but it
>should be fairly easy to do;  You can do it the same way as in Unix:
>use --passphrase-fd and specify the handle from a pipe you have
>created (see W32's CreatePipe()).  We are already using 2 pipes for
>the output and the status stream (gpa/gpapa/gpapaintern.c).  I am
>currently reworking that part but the code is still there.

Well I tried to do just that but didn't manage to get it right. I'm pretty 
sure my password pipe is fine (I can read back what I put in it), yet GnuPG 
doesn't seem to care. I get the message "Reading passphrase from file 
descriptor xx" but then get the error :
gpg: public key decryption failed: bad passphrase
gpg: decryption failed: secret key not available
I'm sure my passphrase is right of course :) . So either I forgot some 
"magic something" somewhere, or there's something broken in gnupg-1.0.2 for 
win32. I looked at the GPA code and doesn't seem to do anything more than I 

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