Fix AID selection.

Signed-off-by: Pol Henarejos <pol.henarejos@cttc.es>

src/fido/cmd_register.c

@@ -33,10 +33,13 @@ int u2f_unload();
 int u2f_process_apdu();
 
 int u2f_select(app_t *a) {
+    if (cap_supported(CAP_U2F)) {
         a->process_apdu = u2f_process_apdu;
         a->unload = u2f_unload;
         return CCID_OK;
     }
+    return CCID_ERR_FILE_NOT_FOUND;
+}
 
 void __attribute__((constructor)) u2f_ctor() {
     register_app(u2f_select, u2f_aid);

src/fido/fido.c

@@ -55,10 +55,13 @@ const uint8_t atr_fido[] = {
 };
 
 int fido_select(app_t *a) {
+    if (cap_supported(CAP_FIDO2)) {
         a->process_apdu = fido_process_apdu;
         a->unload = fido_unload;
         return CCID_OK;
     }
+    return CCID_ERR_FILE_NOT_FOUND;
+}
 
 void __attribute__((constructor)) fido_ctor() {
 #if defined(USB_ITF_CCID) || defined(ENABLE_EMULATION)

src/fido/oath.c

@@ -69,6 +69,7 @@ const uint8_t oath_aid[] = {
 };
 
 int oath_select(app_t *a) {
+    if (cap_supported(CAP_OATH)) {
         a->process_apdu = oath_process_apdu;
         a->unload = oath_unload;
         res_APDU_size = 0;
@@ -105,6 +106,8 @@ int oath_select(app_t *a) {
         apdu.ne = res_APDU_size;
         return CCID_OK;
     }
+    return CCID_ERR_FILE_NOT_FOUND;
+}
 
 void __attribute__((constructor)) oath_ctor() {
     register_app(oath_select, oath_aid);

src/fido/otp.c

@@ -117,6 +117,7 @@ const uint8_t otp_aid[] = {
 };
 
 int otp_select(app_t *a) {
+    if (cap_supported(CAP_OTP)) {
         a->process_apdu = otp_process_apdu;
         a->unload = otp_unload;
         if (file_has_data(search_dynamic_file(EF_OTP_SLOT1)) ||
@@ -132,6 +133,8 @@ int otp_select(app_t *a) {
         apdu.ne = res_APDU_size;
         return CCID_OK;
     }
+    return CCID_ERR_FILE_NOT_FOUND;
+}
 
 uint8_t modhex_tab[] =
 { 'c', 'b', 'd', 'e', 'f', 'g', 'h', 'i', 'j', 'k', 'l', 'n', 'r', 't', 'u', 'v' };