epass2003 - Fix misshandling of SM mode

When calling to erase the card (which the code says it does not handle)
the sm.mode is left set even if sm mode can not be established.
This can cause the problem with the next APDU failing which can cause
a conversion to a sm_apdu being returned as NULL.

also see: OpenSC#3196

Author: dengert

src/libopensc/card-epass2003.c

@@ -2831,7 +2831,6 @@ epass2003_create_file(struct sc_card *card, sc_file_t * file)
 	apdu.lc = len;
 	apdu.datalen = len;
 	apdu.data = sbuf;
-
 	r = sc_transmit_apdu_t(card, &apdu);
 	LOG_TEST_RET(card->ctx, r, "APDU transmit failed");
 	r = sc_check_sw(card, apdu.sw1, apdu.sw2);
@@ -3215,6 +3214,7 @@ epass2003_erase_card(struct sc_card *card)
 	static const unsigned char mf_path[2] = { 0x3f, 0x00 };
 	sc_apdu_t apdu;
 	int r;
+	int saved_sm_mode = 0;
 
 	LOG_FUNC_CALLED(card->ctx);
 	sc_invalidate_cache(card);
@@ -3224,7 +3224,13 @@ epass2003_erase_card(struct sc_card *card)
 	apdu.cla = 0x80;
 	apdu.data = install_magic_pin;
 	apdu.datalen = apdu.lc = sizeof(install_magic_pin);
+
+	saved_sm_mode = card->sm_ctx.sm_mode;
+        card->sm_ctx.sm_mode = 0;
+
 	r = sc_transmit_apdu(card, &apdu);
+	card->sm_ctx.sm_mode = saved_sm_mode;
+
 	LOG_TEST_RET(card->ctx, r, "APDU install magic pin failed");
 	r = sc_check_sw(card, apdu.sw1, apdu.sw2);
 	LOG_TEST_RET(card->ctx, r, "install magic pin failed");

src/pkcs15init/pkcs15-epass2003.c

@@ -37,8 +37,10 @@ static int epass2003_pkcs15_erase_card(struct sc_profile *profile,
 {
 	SC_FUNC_CALLED(p15card->card->ctx, SC_LOG_DEBUG_VERBOSE);
 
-	if (sc_select_file(p15card->card, sc_get_mf_path(), NULL) < 0)
-		return SC_SUCCESS;
+	if (sc_select_file(p15card->card, sc_get_mf_path(), NULL) < 0) {
+		sc_do_log(p15card->card->ctx, SC_LOG_DEBUG_VERBOSE_TOOL,NULL,0,NULL,
+			"epass2003_pkcs15__erase_card failed calling sc_select_file, continue with erase. \n");
+	}
 
 	return sc_card_ctl(p15card->card, SC_CARDCTL_ERASE_CARD, 0);
 }