Delete key from OpenPGP card?
Nguyễn Hồng Quân
quannguyen at mbm.vn
Mon Mar 4 10:24:54 CET 2013
How's about emptying Extended Header List
I tried to put these data to 004D tag, but none of them works.
- 4D 08 A400 7F48 00 5F48 00
(null data to 7848 and 5F48)
- 4D 10 A400 7F48 08 9100 9200 9300 9500 5F48 00
(null data to 91 (exponent), 92 (p), 93 (q), 95 (modulus) and null data
- 4D 13 A400 7F48 0B 9103010001 9200 9300 9500 5F48 00
(like above, but set default value (010001) for exponent)
I use 95 as modulus holder, instead of 97, because I look in to GnuPG
source and found 95 is used.
What's the correct APDU, or correct data to reset Extended Header List?
On Mon 04 Mar 2013 02:48:50 PM ICT, Nguyễn Hồng Quân wrote:
> I'm implementing "delete key" in OpenSC for OpenPGP card.
> To delete authentication key, for example, I think I have to empty these
> - 00C9, containing fingerprint for the key
> - 00D0, containing creation time for the key
> and rewrite the Extended header list with 00DB command.
> However, I failed to empty 00C9. I tried these APDU:
> 1. 00 DA 00 C9
> Return error 6700 (Wrong length)
> 2. 00 DA 00 C9 00
> Return error 6400 (Execution error)
> The 1st form, I tried with normal DO, like 005B, and succeeded.
> The 2nd form, I referenced
> (This script is for Gnuk card and success with Gnuk).
> Why none of these APDU work with OpenPGP card? What is the correct APDU
> for OpenPGP?
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