card: Better detect removed cards. Add TCOS PIN menu.

* tools/card-call-scd.c (scd_change_pin): Add arg 'nullpin'.
* tools/gpg-card.h (struct card_info_s): Add field 'card_removed'.
* tools/gpg-card.c (fixup_scd_errors): New.
(maybe_set_card_removed): New.
(list_one_kinfo): Change type of first arg to get access to INFO.  Set
card_removed flag.
(list_all_kinfo): Improve label alignment.
(cmd_list): Check that the current card is still available.
(cmd_passwd): Add option --nullpin and menu to chnage TCOS PINs.
(dispatch_command): Handle card_removed flag.
(interactive_loop): Ditto.
--

Note that that I was not able to change the NullPIN of the standard
PIN using a Signature V2 Brainpool test card.  Changing the NullPIN of
the QES PIN worked, though.  I checked the commands send to scdaemon
and they were correct - I used the very same command with
gpg-connect-agent last week to set a Pin for a production Brainpool
Signature card.  Thus this might be a problem with this specific test
card.

Signed-off-by: Werner Koch <wk@gnupg.org>

1 files changed, 2 insertions, 1 deletions

diff --git a/tools/gpg-card.h b/tools/gpg-card.h
index 82064999c..56e117bf3 100644
--- a/tools/gpg-card.h
+++ b/tools/gpg-card.h
@@ -139,6 +139,7 @@ struct card_info_s
 {
   int initialized;   /* True if a learn command was successful. */
   int need_sn_cmd;   /* The SERIALNO command needs to be issued.  */
+  int card_removed;  /* Helper flag set by some listing functions.  */
   int error;         /* private. */
   char *reader;      /* Reader information.  */
   char *cardtype;    /* NULL or type of the card.  */
@@ -232,7 +233,7 @@ gpg_error_t scd_readcert (const char *certidstr,
 gpg_error_t scd_readkey (const char *keyrefstr, gcry_sexp_t *r_result);
 gpg_error_t scd_cardlist (strlist_t *result);
 gpg_error_t scd_applist (strlist_t *result, int all);
-gpg_error_t scd_change_pin (const char *pinref, int reset_mode);
+gpg_error_t scd_change_pin (const char *pinref, int reset_mode, int nullpin);
 gpg_error_t scd_checkpin (const char *serialno);
 
 unsigned long agent_get_s2k_count (void);