/*
* Automagically allocate a MifareTag given a device and target info.
*/
MifareTag
freefare_tag_new (nfc_device *device, nfc_iso14443a_info nai)
{
bool found = false;
struct supported_tag *tag_info;
MifareTag tag;
/* Ensure the target is supported */
for (size_t i = 0; i < sizeof (supported_tags) / sizeof (struct supported_tag); i++) {
if (((nai.szUidLen == 4) || (nai.abtUid[0] == NXP_MANUFACTURER_CODE)) &&
(nai.btSak == supported_tags[i].SAK) &&
(!supported_tags[i].ATS_min_length || ((nai.szAtsLen >= supported_tags[i].ATS_min_length) &&
(0 == memcmp (nai.abtAts, supported_tags[i].ATS, supported_tags[i].ATS_compare_length)))) &&
((supported_tags[i].check_tag_on_reader == NULL) ||
supported_tags[i].check_tag_on_reader(device, nai))) {
tag_info = &(supported_tags[i]);
found = true;
break;
}
}
if (!found)
return NULL;
/* Allocate memory for the found MIFARE target */
switch (tag_info->type) {
case CLASSIC_1K:
case CLASSIC_4K:
tag = mifare_classic_tag_new ();
break;
case DESFIRE:
tag = mifare_desfire_tag_new ();
break;
case ULTRALIGHT:
case ULTRALIGHT_C:
tag = mifare_ultralight_tag_new ();
break;
}
if (!tag)
return NULL;
/*
* Initialize common fields
* (Target specific fields are initialized in mifare_*_tag_new())
*/
tag->device = device;
tag->info = nai;
tag->active = 0;
tag->tag_info = tag_info;
return tag;
}
/*
* Get a list of the MIFARE targets near to the provided NFC initiator.
*
* The list has to be freed using the freefare_free_tags() function.
*/
MifareTag *
freefare_get_tags (nfc_device_t *device)
{
MifareTag *tags = NULL;
int tag_count = 0;
nfc_initiator_init(device);
// Drop the field for a while
nfc_configure(device,NDO_ACTIVATE_FIELD,false);
// Let the reader only try once to find a tag
nfc_configure(device,NDO_INFINITE_SELECT,false);
// Configure the CRC and Parity settings
nfc_configure(device,NDO_HANDLE_CRC,true);
nfc_configure(device,NDO_HANDLE_PARITY,true);
// Enable field so more power consuming cards can power themselves up
nfc_configure(device,NDO_ACTIVATE_FIELD,true);
// Poll for a ISO14443A (MIFARE) tag
nfc_target_info_t target_info;
tags = malloc(sizeof (void *));
if(!tags) return NULL;
tags[0] = NULL;
while (nfc_initiator_select_passive_target(device,NM_ISO14443A_106,NULL,0,&target_info)) {
bool found = false;
struct supported_tag *tag_info;
for (size_t i = 0; i < sizeof (supported_tags) / sizeof (struct supported_tag); i++) {
if (((target_info.nai.szUidLen == 4) || (target_info.nai.abtUid[0] == NXP_MANUFACTURER_CODE)) &&
(target_info.nai.btSak == supported_tags[i].SAK) &&
(target_info.nai.szAtsLen == supported_tags[i].ATS_length) &&
(0 == memcmp (target_info.nai.abtAts, supported_tags[i].ATS, supported_tags[i].ATS_length))) {
tag_info = &(supported_tags[i]);
found = true;
break;
}
}
if (!found)
goto deselect;
tag_count++;
/* (Re)Allocate memory for the found MIFARE targets array */
MifareTag *p = realloc (tags, (tag_count + 1) * sizeof (MifareTag));
if (p)
tags = p;
else
return tags; // FAIL! Return what has been found so far.
/* Allocate memory for the found MIFARE target */
switch (tag_info->type) {
case CLASSIC_1K:
case CLASSIC_4K:
tags[tag_count-1] = mifare_classic_tag_new ();
break;
case DESFIRE:
tags[tag_count-1] = mifare_desfire_tag_new (0); //JIM
break;
case ULTRALIGHT:
tags[tag_count-1] = mifare_ultralight_tag_new ();
break;
}
if (!tags[tag_count-1])
return tags; // FAIL! Return what has been found before.
/*
* Initialize common fields
* (Target specific fields are initialized in mifare_*_tag_new())
*/
(tags[tag_count-1])->device = device;
(tags[tag_count-1])->info = target_info.nai;
(tags[tag_count-1])->active = 0;
(tags[tag_count-1])->tag_info = tag_info;
tags[tag_count] = NULL;
deselect:
nfc_initiator_deselect_target (device);
}
return tags;
}
/*
* Automagically allocate a FreefareTag given a device and target info.
*/
FreefareTag
freefare_tag_new (nfc_device *device, nfc_target target)
{
bool found = false;
struct supported_tag *tag_info;
FreefareTag tag;
/* Ensure the target is supported */
for (size_t i = 0; i < sizeof (supported_tags) / sizeof (struct supported_tag); i++) {
if (target.nm.nmt != supported_tags[i].modulation_type)
continue;
if (target.nm.nmt == NMT_FELICA) {
tag_info = &(supported_tags[i]);
found = true;
break;
}
if ((target.nm.nmt == NMT_ISO14443A) && ((target.nti.nai.szUidLen == 4) || (target.nti.nai.abtUid[0] == NXP_MANUFACTURER_CODE) || (target.nti.nai.abtUid[0] == RANDOM_UID)) &&
(target.nti.nai.btSak == supported_tags[i].SAK) &&
(!supported_tags[i].ATS_min_length || ((target.nti.nai.szAtsLen >= supported_tags[i].ATS_min_length) &&
(0 == memcmp (target.nti.nai.abtAts, supported_tags[i].ATS, supported_tags[i].ATS_compare_length)))) &&
((supported_tags[i].check_tag_on_reader == NULL) ||
supported_tags[i].check_tag_on_reader(device, target.nti.nai))) {
tag_info = &(supported_tags[i]);
found = true;
break;
}
}
if (!found)
return NULL;
/* Allocate memory for the found MIFARE target */
switch (tag_info->type) {
case FELICA:
tag = felica_tag_new ();
break;
case MIFARE_CLASSIC_1K:
case MIFARE_CLASSIC_4K:
tag = mifare_classic_tag_new ();
break;
case MIFARE_DESFIRE:
tag = mifare_desfire_tag_new ();
break;
case MIFARE_ULTRALIGHT:
case MIFARE_ULTRALIGHT_C:
tag = mifare_ultralight_tag_new ();
break;
}
if (!tag)
return NULL;
/*
* Initialize common fields
* (Target specific fields are initialized in mifare_*_tag_new())
*/
tag->device = device;
tag->info = target;
tag->active = 0;
tag->tag_info = tag_info;
return tag;
}
