keyflag subpacket and key expiration subpacket

[Christoph Anton Mitterer]

David Shaw wrote:

>Honestly, no.  It would be a significant project to rewrite those
>sections of the program.
>  
>
Ok, thanks anyway :-)

I'm going to try to create such sigs by patching a lokal version of gpg,...
1) Creating a new 0x1F sig containing the required stuff (this should be 
the same things as found on the 0x1F sigs for the revokation-key, 
correct? - of course without the revokation key subpacket itself) with 
an additional key-expiration-time and key-flag subpacket.
2) Recreate the 0x13 for all the UIDs,.. and simply delete the 
key-expiration-time and key-flag subpacket, correct?

Ok,.. I'm always unsure if my patches are correct, but is true that 
everything should have worked well if:
- I manually look up the hexcode of the whole signature packet and 
compare it with the standard,...
- import the sig in gpg to see if the signature data itself has been 
calculatet correctly. If not gpg should complain...


Chris.
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