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-rw-r--r--scd/app.c22
1 files changed, 20 insertions, 2 deletions
diff --git a/scd/app.c b/scd/app.c
index aeb773a67..3686c0f6c 100644
--- a/scd/app.c
+++ b/scd/app.c
@@ -1606,9 +1606,13 @@ check_external_interference (app_t app, ctrl_t ctrl)
/*
* Only when a user is using Yubikey with pcsc-shared configuration,
* we need this detection. Otherwise, the card/token is under full
- * control of scdaemon, there's no problem at all.
+ * control of scdaemon, there's no problem at all. However, if the
+ * APDU command has been used we better also check whether the AID
+ * is still valid.
*/
- if (!opt.pcsc_shared || app->card->cardtype != CARDTYPE_YUBIKEY)
+ if (app && app->card && app->card->maybe_check_aid)
+ app->card->maybe_check_aid = 0;
+ else if (!opt.pcsc_shared || app->card->cardtype != CARDTYPE_YUBIKEY)
return 0;
if (app->fnc.check_aid)
@@ -1646,6 +1650,20 @@ maybe_switch_app (ctrl_t ctrl, card_t card, const char *keyref)
if (!card->app)
return gpg_error (GPG_ERR_CARD_NOT_INITIALIZED);
+
+ if (card->maybe_check_aid && card->app->fnc.reselect
+ && check_external_interference (card->app, ctrl))
+ {
+ if (DBG_APP)
+ log_debug ("slot %d, app %s: forced re-select due to direct APDU use\n",
+ card->slot, xstrapptype (card->app));
+ err = card->app->fnc.reselect (card->app, ctrl);
+ if (err)
+ log_error ("slot %d, app %s: forced re-select failed: %s - ignored\n",
+ card->slot, xstrapptype (card->app), gpg_strerror (err));
+ err = 0;
+ }
+
if (!ctrl->current_apptype)
{
/* For whatever reasons the current apptype has not been set -