/*
* Retrieve version information form the PICC.
*/
int
mifare_desfire_get_version (MifareTag tag, struct mifare_desfire_version_info *version_info)
{
ASSERT_ACTIVE (tag);
ASSERT_MIFARE_DESFIRE (tag);
ASSERT_NOT_NULL (version_info);
BUFFER_INIT (cmd, 1);
BUFFER_INIT (res, 15); /* 8, 8, then 15 byte results */
BUFFER_APPEND (cmd, 0x60);
DESFIRE_TRANSCEIVE (tag, cmd, res);
memcpy (&(version_info->hardware), res+1, 7);
cmd[0] = 0xAF;
DESFIRE_TRANSCEIVE (tag, cmd, res);
memcpy (&(version_info->software), res+1, 7);
DESFIRE_TRANSCEIVE (tag, cmd, res);
memcpy (&(version_info->uid), res+1, 14);
return 0;
}
int
mifare_desfire_get_value_ex (MifareTag tag, uint8_t file_no, int32_t *value, int cs)
{
if (!value)
return errno = EINVAL, -1;
void *p;
ASSERT_ACTIVE (tag);
ASSERT_MIFARE_DESFIRE (tag);
BUFFER_INIT (cmd, 2);
BUFFER_INIT (res, 9);
BUFFER_APPEND (cmd, 0x6C);
BUFFER_APPEND (cmd, file_no);
DESFIRE_TRANSCEIVE (tag, cmd, res);
p = (uint8_t *)res + 1;
if (cs) {
ssize_t rdl = BUFFER_SIZE (res) - 1;
p = mifare_cryto_postprocess_data (tag, p, &rdl, cs);
if (rdl != 4) {
printf ("invalid data length");
return -1;
}
}
*value = le32toh (*(int32_t *)(p));
return 0;
}
int
mifare_desfire_change_key_settings (MifareTag tag, uint8_t settings)
{
ASSERT_ACTIVE (tag);
ASSERT_MIFARE_DESFIRE (tag);
ASSERT_AUTHENTICATED (tag);
BUFFER_INIT (cmd, 9);
BUFFER_INIT (res, 1);
BUFFER_APPEND (cmd, 0x54);
uint8_t data[8];
data[0] = settings;
iso14443a_crc (data, 1, data + 1);
bzero (data+3, 5);
mifare_cbc_des (MIFARE_DESFIRE (tag)->session_key, data, 8, MD_SEND, 0);
BUFFER_APPEND_BYTES (cmd, data, 8);
DESFIRE_TRANSCEIVE (tag, cmd, res);
return 0;
}
static ssize_t
read_data (MifareTag tag, uint8_t command, uint8_t file_no, off_t offset, size_t length, void *data, int cs)
{
ssize_t bytes_read = 0;
void *p = data;
ASSERT_ACTIVE (tag);
ASSERT_MIFARE_DESFIRE (tag);
BUFFER_INIT (cmd, 8);
BUFFER_INIT (res, MAX_FRAME_SIZE);
BUFFER_APPEND (cmd, command);
BUFFER_APPEND (cmd, file_no);
BUFFER_APPEND_LE (cmd, offset, 3, sizeof (off_t));
BUFFER_APPEND_LE (cmd, length, 3, sizeof (size_t));
if (cs) {
if (!(p = assert_crypto_buffer_size (tag, MAX_FRAME_SIZE - 1)))
return -1;
}
do {
ssize_t frame_bytes;
DESFIRE_TRANSCEIVE (tag, cmd, res);
frame_bytes = BUFFER_SIZE (res) - 1;
memcpy ((uint8_t *)p + bytes_read, res + 1, frame_bytes);
bytes_read += frame_bytes;
if (res[0] == 0xAF) {
if (p != data) {
// If we are handling memory, request more for next frame.
if (!(p = assert_crypto_buffer_size (tag, bytes_read + MAX_FRAME_SIZE - 1)))
return -1;
}
BUFFER_CLEAR (cmd);
BUFFER_APPEND (cmd, 0xAF);
}
} while (res[0] != 0x00);
if (cs) {
if (mifare_cryto_postprocess_data (tag, p, &bytes_read, cs))
memcpy (data, p, bytes_read);
}
return bytes_read;
}
int
mifare_desfire_change_key (MifareTag tag, uint8_t key_no, MifareDESFireKey new_key, MifareDESFireKey old_key)
{
ASSERT_ACTIVE (tag);
ASSERT_MIFARE_DESFIRE (tag);
ASSERT_AUTHENTICATED (tag);
BUFFER_INIT (cmd, 1+1+24);
BUFFER_INIT (res, 1);
BUFFER_APPEND (cmd, 0xC4);
BUFFER_APPEND (cmd, key_no);
uint8_t data[24];
if ((MIFARE_DESFIRE (tag)->authenticated_key_no != key_no) /* FIXME && (ChangeKey key != 0x0E)*/) {
if (old_key) {
memcpy (data, old_key->data, 16);
} else {
bzero (data, 16);
}
for (int n=0; n<16; n++) {
data[n] ^= new_key->data[n];
}
// Append XORed data CRC
iso14443a_crc (data, 16, data+16);
// Append new key CRC
iso14443a_crc (new_key->data, 16, data+18);
// Padding
for (int n=20; n<24; n++) {
data[n] = 0x00;
}
} else {
memcpy (data, new_key->data, 16);
// Append new key CRC
iso14443a_crc (data, 16, data+16);
// Padding
for (int n=18; n<24; n++) {
data[n] = 0x00;
}
}
mifare_cbc_des (MIFARE_DESFIRE (tag)->session_key, data, 24, MD_SEND, 0);
BUFFER_APPEND_BYTES (cmd, data, 24);
DESFIRE_TRANSCEIVE (tag, cmd, res);
return 0;
}
/*
* Terminate connection with the provided tag.
*/
int
mifare_desfire_disconnect (MifareTag tag)
{
ASSERT_ACTIVE (tag);
ASSERT_MIFARE_DESFIRE (tag);
free (MIFARE_DESFIRE (tag)->session_key);
MIFARE_DESFIRE(tag)->session_key = NULL;
if (nfc_initiator_deselect_target (tag->device)) {
tag->active = 0;
}
return 0;
}
/*
* Terminate connection with the provided tag.
*/
int
mifare_ultralight_disconnect (MifareTag tag)
{
ASSERT_ACTIVE (tag);
ASSERT_MIFARE_ULTRALIGHT (tag);
if (nfc_initiator_deselect_target (tag->device) >= 0) {
tag->active = 0;
} else {
errno = EIO;
return -1;
}
return 0;
}
static ssize_t
write_data (MifareTag tag, uint8_t command, uint8_t file_no, off_t offset, size_t length, void *data, int cs)
{
size_t bytes_left;
size_t bytes_send = 0;
void *p = data;
ASSERT_ACTIVE (tag);
ASSERT_MIFARE_DESFIRE (tag);
BUFFER_INIT (cmd, MAX_FRAME_SIZE);
BUFFER_INIT (res, 1);
BUFFER_APPEND (cmd, command);
BUFFER_APPEND (cmd, file_no);
BUFFER_APPEND_LE (cmd, offset, 3, sizeof (off_t));
BUFFER_APPEND_LE (cmd, length, 3, sizeof (size_t));
p = mifare_cryto_preprocess_data (tag, data, &length, cs);
bytes_left = 52;
while (bytes_send < length) {
size_t frame_bytes = MIN(bytes_left, length - bytes_send);
BUFFER_APPEND_BYTES (cmd, (uint8_t *)p + bytes_send, frame_bytes);
DESFIRE_TRANSCEIVE (tag, cmd, res);
bytes_send += frame_bytes;
if (0x00 == res[0])
break;
// PICC returned 0xAF and expects more data
BUFFER_CLEAR (cmd);
BUFFER_APPEND (cmd, 0xAF);
bytes_left = 0x59;
}
if (0x00 != res[0]) {
// 0xAF (additionnal Frame) failure can happen here (wrong crypto method).
MIFARE_DESFIRE (tag)->last_picc_error = res[0];
bytes_send = -1;
}
return bytes_send;
}
int
mifare_desfire_abort_transaction (MifareTag tag)
{
ASSERT_ACTIVE (tag);
ASSERT_MIFARE_DESFIRE (tag);
BUFFER_INIT (cmd, 1);
BUFFER_INIT (res, 1);
BUFFER_APPEND (cmd, 0xA7);
DESFIRE_TRANSCEIVE (tag, cmd, res);
return 0;
}
/* Step the game simulation by handling events, and drawing: */
int game_step(void *input) {
GameData *gd = input;
ASSERT_ACTIVE();
EventType temp;
/* Handle all queued events: */
while( (temp=gamelib_event_get_type()) != GAME_EVENT_NONE ) {
/* Trying to resize the window? */
if(temp == GAME_EVENT_RESIZE) {
Rect r = gamelib_event_resize_get_size();
screen_resize(gd->data.active.s, r.w, r.h);
/* Trying to toggle fullscreen? */
} else if(temp == GAME_EVENT_TOGGLE_FULLSCREEN) {
screen_set_fullscreen(gd->data.active.s, -1);
/* Trying to exit? */
} else if(temp == GAME_EVENT_EXIT) {
return 1;
}
/* Done with this event: */
gamelib_event_done();
}
/* Clear everything: */
tanklist_map(gd->data.active.tl, tank_clear(t, gd->data.active.b));
plist_clear (gd->data.active.pl, gd->data.active.b);
/* Charge a small bit of energy for life: */
tanklist_map(gd->data.active.tl, tank_alter_energy(t, TANK_IDLE_COST));
/* See if we need to be healed: */
tanklist_map(gd->data.active.tl, tank_try_base_heal(t));
/* Move everything: */
plist_step (gd->data.active.pl, gd->data.active.lvl, gd->data.active.tl);
tanklist_map(gd->data.active.tl, tank_move(t, gd->data.active.tl));
/* Draw everything: */
plist_draw (gd->data.active.pl, gd->data.active.b);
tanklist_map(gd->data.active.tl, tank_draw(t, gd->data.active.b));
screen_draw (gd->data.active.s);
return 0;
}
int
mifare_desfire_delete_file (MifareTag tag, uint8_t file_no)
{
ASSERT_ACTIVE (tag);
ASSERT_MIFARE_DESFIRE (tag);
BUFFER_INIT (cmd, 2);
BUFFER_INIT (res, 1);
BUFFER_APPEND (cmd, 0xDF);
BUFFER_APPEND (cmd, file_no);
DESFIRE_TRANSCEIVE (tag, cmd, res);
return 0;
}
int
mifare_desfire_format_picc (MifareTag tag)
{
ASSERT_ACTIVE (tag);
ASSERT_MIFARE_DESFIRE (tag);
ASSERT_AUTHENTICATED (tag);
BUFFER_INIT (cmd, 1);
BUFFER_INIT (res, 1);
BUFFER_APPEND (cmd, 0xFC);
DESFIRE_TRANSCEIVE (tag, cmd, res);
return 0;
}
int
mifare_desfire_delete_application (MifareTag tag, MifareDESFireAID aid)
{
ASSERT_ACTIVE (tag);
ASSERT_MIFARE_DESFIRE (tag);
BUFFER_INIT (cmd, 4);
BUFFER_INIT (res, 1);
BUFFER_APPEND (cmd, 0xDA);
BUFFER_APPEND_LE (cmd, aid->data, sizeof (aid->data), sizeof (aid->data));
DESFIRE_TRANSCEIVE (tag, cmd, res);
return 0;
}
int
mifare_desfire_change_file_settings (MifareTag tag, uint8_t file_no, uint8_t communication_settings, uint16_t access_rights)
{
ASSERT_ACTIVE (tag);
ASSERT_MIFARE_DESFIRE (tag);
// TODO: Use a current application files settings cache.
struct mifare_desfire_file_settings settings;
int res = mifare_desfire_get_file_settings (tag, file_no, &settings);
if (res < 0)
return res;
if (MDAR_CHANGE_AR(settings.access_rights) == MDAR_FREE) {
BUFFER_INIT (cmd, 5);
BUFFER_INIT (res, 1);
BUFFER_APPEND (cmd, 0x5F);
BUFFER_APPEND (cmd, file_no);
BUFFER_APPEND (cmd, communication_settings);
BUFFER_APPEND_LE (cmd, access_rights, 2, sizeof (uint16_t));
DESFIRE_TRANSCEIVE (tag, cmd, res);
} else {
BUFFER_INIT (cmd, 10);
BUFFER_INIT (res, 1);
uint8_t data[8];
BUFFER_APPEND (cmd, 0x5F);
BUFFER_APPEND (cmd, file_no);
data[0] = communication_settings;
uint16_t le_ar = htole16 (access_rights);
memcpy (data + 1, &le_ar, sizeof (le_ar));
iso14443a_crc (data, 3, data+3);
bzero (data + 5, 3);
mifare_cbc_des (MIFARE_DESFIRE (tag)->session_key, data, 8, MD_SEND, 0);
BUFFER_APPEND_BYTES (cmd, data, 8);
DESFIRE_TRANSCEIVE (tag, cmd, res);
}
return 0;
}
int
mifare_desfire_create_application (MifareTag tag, MifareDESFireAID aid, uint8_t settings, uint8_t key_no)
{
ASSERT_ACTIVE (tag);
ASSERT_MIFARE_DESFIRE (tag);
BUFFER_INIT (cmd, 6);
BUFFER_INIT (res, 1);
BUFFER_APPEND (cmd, 0xCA);
BUFFER_APPEND_LE (cmd, aid->data, sizeof (aid->data), sizeof (aid->data));
BUFFER_APPEND (cmd, settings);
BUFFER_APPEND (cmd, key_no);
DESFIRE_TRANSCEIVE (tag, cmd, res);
return 0;
}
static int
create_file1 (MifareTag tag, uint8_t command, uint8_t file_no, uint8_t communication_settings, uint16_t access_rights, uint32_t file_size)
{
ASSERT_ACTIVE (tag);
ASSERT_MIFARE_DESFIRE (tag);
BUFFER_INIT (cmd, 8);
BUFFER_INIT (res, 1);
BUFFER_APPEND (cmd, command);
BUFFER_APPEND (cmd, file_no);
BUFFER_APPEND (cmd, communication_settings);
BUFFER_APPEND_LE (cmd, access_rights, 2, sizeof (uint16_t));
BUFFER_APPEND_LE (cmd, file_size, 3, sizeof (uint32_t));
DESFIRE_TRANSCEIVE (tag, cmd, res);
return 0;
}
int
mifare_desfire_get_file_settings (MifareTag tag, uint8_t file_no, struct mifare_desfire_file_settings *settings)
{
ASSERT_ACTIVE (tag);
ASSERT_MIFARE_DESFIRE (tag);
BUFFER_INIT (cmd, 2);
BUFFER_INIT (res, 18);
BUFFER_APPEND (cmd, 0xF5);
BUFFER_APPEND (cmd, file_no);
DESFIRE_TRANSCEIVE (tag, cmd, res);
struct mifare_desfire_raw_file_settings raw_settings;
memcpy (&raw_settings, res+1, BUFFER_SIZE (res)-1);
settings->file_type = raw_settings.file_type;
settings->communication_settings = raw_settings.communication_settings;
settings->access_rights = le16toh (raw_settings.access_rights);
switch (settings->file_type) {
case MDFT_STANDARD_DATA_FILE:
case MDFT_BACKUP_DATA_FILE:
settings->settings.standard_file.file_size = le24toh (raw_settings.settings.standard_file.file_size);
break;
case MDFT_VALUE_FILE_WITH_BACKUP:
settings->settings.value_file.lower_limit = le32toh (raw_settings.settings.value_file.lower_limit);
settings->settings.value_file.upper_limit = le32toh (raw_settings.settings.value_file.upper_limit);
settings->settings.value_file.limited_credit_value = le32toh (raw_settings.settings.value_file.limited_credit_value);
settings->settings.value_file.limited_credit_enabled = raw_settings.settings.value_file.limited_credit_enabled;
break;
case MDFT_LINEAR_RECORD_FILE_WITH_BACKUP:
case MDFT_CYCLIC_RECORD_FILE_WITH_BACKUP:
settings->settings.linear_record_file.record_size = le24toh (raw_settings.settings.linear_record_file.record_size);
settings->settings.linear_record_file.max_number_of_records = le24toh (raw_settings.settings.linear_record_file.max_number_of_records);
settings->settings.linear_record_file.current_number_of_records = le24toh (raw_settings.settings.linear_record_file.current_number_of_records);
break;
}
return 0;
}
int
mifare_desfire_get_key_settings (MifareTag tag, uint8_t *settings, uint8_t *max_keys)
{
ASSERT_ACTIVE (tag);
ASSERT_MIFARE_DESFIRE (tag);
BUFFER_INIT (cmd, 1);
BUFFER_INIT (res, 3);
BUFFER_APPEND (cmd, 0x45);
DESFIRE_TRANSCEIVE (tag, cmd, res);
if (settings)
*settings = res[1];
if (max_keys)
*max_keys = res[2];
return 0;
}
/*
* Retrieve version information for a given key.
*/
int
mifare_desfire_get_key_version (MifareTag tag, uint8_t key_no, uint8_t *version)
{
ASSERT_ACTIVE (tag);
ASSERT_MIFARE_DESFIRE (tag);
ASSERT_NOT_NULL (version);
BUFFER_INIT (cmd, 2);
BUFFER_APPEND (cmd, 0x64);
BUFFER_APPEND (cmd, key_no);
BUFFER_INIT (res, 2);
DESFIRE_TRANSCEIVE (tag, cmd, res);
*version = res[1];
return 0;
}
/*
* Read data to the provided MIFARE tag.
*/
int
mifare_ultralight_write (MifareTag tag, const MifareUltralightPageNumber page, const MifareUltralightPage data)
{
ASSERT_ACTIVE (tag);
ASSERT_MIFARE_ULTRALIGHT (tag);
ASSERT_VALID_PAGE (tag, page, true);
BUFFER_INIT (cmd, 6);
BUFFER_INIT (res, 1);
BUFFER_APPEND (cmd, 0xA2);
BUFFER_APPEND (cmd, page);
BUFFER_APPEND_BYTES (cmd, data, sizeof (MifareUltralightPage));
ULTRALIGHT_TRANSCEIVE (tag, cmd, res);
/* Invalidate page in cache */
MIFARE_ULTRALIGHT(tag)->cached_pages[page] = 0;
return 0;
}
/*
* Select the application specified by aid for further operation. If aid is
* NULL, the master application is selected (equivalent to aid = 0x00000).
*/
int
mifare_desfire_select_application (MifareTag tag, MifareDESFireAID aid)
{
ASSERT_ACTIVE (tag);
ASSERT_MIFARE_DESFIRE (tag);
struct mifare_desfire_aid null_aid = { .data = { 0x00, 0x00, 0x00 } };
if (!aid) {
aid = &null_aid;
}
BUFFER_INIT (cmd, 4);
BUFFER_INIT (res, 1);
BUFFER_APPEND (cmd, 0x5A);
BUFFER_APPEND_LE (cmd, aid->data, sizeof (aid->data), sizeof (aid->data));
DESFIRE_TRANSCEIVE (tag, cmd, res);
return 0;
}
int
mifare_desfire_create_value_file (MifareTag tag, uint8_t file_no, uint8_t communication_settings, uint16_t access_rights, int32_t lower_limit, int32_t upper_limit, int32_t value, uint8_t limited_credit_enable)
{
ASSERT_ACTIVE (tag);
ASSERT_MIFARE_DESFIRE (tag);
BUFFER_INIT (cmd, 18);
BUFFER_INIT (res, 1);
BUFFER_APPEND (cmd, 0xCC);
BUFFER_APPEND (cmd, file_no);
BUFFER_APPEND (cmd, communication_settings);
BUFFER_APPEND_LE (cmd, access_rights, 2, sizeof (uint16_t));
BUFFER_APPEND_LE (cmd, lower_limit, 4, sizeof (int32_t));
BUFFER_APPEND_LE (cmd, upper_limit, 4, sizeof (int32_t));
BUFFER_APPEND_LE (cmd, value, 4, sizeof (int32_t));
BUFFER_APPEND (cmd, limited_credit_enable);
DESFIRE_TRANSCEIVE (tag, cmd, res);
return 0;
}
int
mifare_desfire_limited_credit_ex (MifareTag tag, uint8_t file_no, int32_t amount, int cs)
{
ASSERT_ACTIVE (tag);
ASSERT_MIFARE_DESFIRE (tag);
BUFFER_INIT (cmd, 10);
BUFFER_INIT (res, 1);
BUFFER_INIT (data, 4);
BUFFER_APPEND_LE (data, amount, 4, sizeof (int32_t));
BUFFER_APPEND (cmd, 0x1C);
BUFFER_APPEND (cmd, file_no);
size_t n = 4;
void *d = mifare_cryto_preprocess_data (tag, data, &n, cs);
BUFFER_APPEND_BYTES (cmd, d, n);
DESFIRE_TRANSCEIVE (tag, cmd, res);
return 0;
}
int
mifare_desfire_get_file_ids (MifareTag tag, uint8_t *files[], size_t *count)
{
ASSERT_ACTIVE (tag);
ASSERT_MIFARE_DESFIRE (tag);
BUFFER_INIT (cmd, 1);
BUFFER_INIT (res, 16);
BUFFER_APPEND (cmd, 0x6F);
DESFIRE_TRANSCEIVE (tag, cmd, res);
*count = BUFFER_SIZE (res) - 1;
if (!(*files = malloc (*count))) {
errno = ENOMEM;
return -1;
}
memcpy (*files, res+1, *count);
return 0;
}
int
mifare_desfire_get_application_ids (MifareTag tag, MifareDESFireAID *aids[], size_t *count)
{
ASSERT_ACTIVE (tag);
ASSERT_MIFARE_DESFIRE (tag);
BUFFER_INIT (cmd, 1);
BUFFER_INIT (res, MAX_FRAME_SIZE);
BUFFER_APPEND (cmd, 0x6A);
DESFIRE_TRANSCEIVE (tag, cmd, res);
*count = (BUFFER_SIZE (res)-1)/3;
*aids = malloc ((*count + 1) * sizeof (MifareDESFireAID));
for (size_t i = 0; (3*i + 1) < BUFFER_SIZE (res); i++) {
(*aids)[i] = memdup (res + 3*i + 1, 3);
}
if (res[0] == 0xAF) {
cmd[0] = 0xAF;
DESFIRE_TRANSCEIVE (tag, cmd, res);
*count += (BUFFER_SIZE (res)-1) / 3;
MifareDESFireAID *p;
if ((p = realloc (*aids, (*count + 1) * sizeof (MifareDESFireAID)))) {
*aids = p;
for (size_t i = 0; (3*i + 1) < BUFFER_SIZE (res); i++) {
(*aids)[19+i] = memdup (res + 3*i + 1, 3);
}
}
}
(*aids)[*count] = NULL;
return 0;
}
/*
* Read data from the provided MIFARE tag.
*/
int
mifare_ultralight_read (MifareTag tag, MifareUltralightPageNumber page, MifareUltralightPage *data)
{
ASSERT_ACTIVE (tag);
ASSERT_MIFARE_ULTRALIGHT (tag);
ASSERT_VALID_PAGE (tag, page, false);
if (!MIFARE_ULTRALIGHT(tag)->cached_pages[page]) {
BUFFER_INIT (cmd, 2);
BUFFER_ALIAS (res, MIFARE_ULTRALIGHT(tag)->cache[page], sizeof(MifareUltralightPage) * 4);
BUFFER_APPEND (cmd, 0x30);
BUFFER_APPEND (cmd, page);
ULTRALIGHT_TRANSCEIVE (tag, cmd, res);
/* Handle wrapped pages */
int iPageCount;
if (IS_MIFARE_ULTRALIGHT_C(tag)) {
iPageCount = MIFARE_ULTRALIGHT_C_PAGE_COUNT_READ;
} else {
iPageCount = MIFARE_ULTRALIGHT_PAGE_COUNT;
}
for (int i = iPageCount; i <= page + 3; i++) {
memcpy (MIFARE_ULTRALIGHT(tag)->cache[i % iPageCount], MIFARE_ULTRALIGHT(tag)->cache[i], sizeof (MifareUltralightPage));
}
/* Mark pages as cached */
for (int i = page; i <= page + 3; i++) {
MIFARE_ULTRALIGHT(tag)->cached_pages[i % iPageCount] = 1;
}
}
memcpy (data, MIFARE_ULTRALIGHT(tag)->cache[page], sizeof (*data));
return 0;
}
/*
* Authenticate to the provided MIFARE tag.
*/
int
mifare_ultralightc_authenticate (MifareTag tag, const MifareDESFireKey key)
{
ASSERT_ACTIVE (tag);
ASSERT_MIFARE_ULTRALIGHT_C (tag);
BUFFER_INIT (cmd1, 2);
BUFFER_INIT (res, 9);
BUFFER_APPEND (cmd1, 0x1A);
BUFFER_APPEND (cmd1, 0x00);
ULTRALIGHT_TRANSCEIVE_RAW(tag, cmd1, res);
uint8_t PICC_E_RndB[8];
memcpy (PICC_E_RndB, res+1, 8);
uint8_t PICC_RndB[8];
memcpy (PICC_RndB, PICC_E_RndB, 8);
uint8_t ivect[8];
memset (ivect, '\0', sizeof (ivect));
mifare_cypher_single_block (key, PICC_RndB, ivect, MCD_RECEIVE, MCO_DECYPHER, 8);
uint8_t PCD_RndA[8];
DES_random_key ((DES_cblock*)&PCD_RndA);
uint8_t PCD_r_RndB[8];
memcpy (PCD_r_RndB, PICC_RndB, 8);
rol (PCD_r_RndB, 8);
uint8_t token[16];
memcpy (token, PCD_RndA, 8);
memcpy (token+8, PCD_r_RndB, 8);
size_t offset = 0;
while (offset < 16) {
mifare_cypher_single_block (key, token + offset, ivect, MCD_SEND, MCO_ENCYPHER, 8);
offset += 8;
}
BUFFER_INIT (cmd2, 17);
BUFFER_APPEND (cmd2, 0xAF);
BUFFER_APPEND_BYTES (cmd2, token, 16);
ULTRALIGHT_TRANSCEIVE_RAW(tag, cmd2, res);
uint8_t PICC_E_RndA_s[8];
memcpy (PICC_E_RndA_s, res+1, 8);
uint8_t PICC_RndA_s[8];
memcpy (PICC_RndA_s, PICC_E_RndA_s, 8);
mifare_cypher_single_block (key, PICC_RndA_s, ivect, MCD_RECEIVE, MCO_DECYPHER, 8);
uint8_t PCD_RndA_s[8];
memcpy (PCD_RndA_s, PCD_RndA, 8);
rol (PCD_RndA_s, 8);
if (0 != memcmp (PCD_RndA_s, PICC_RndA_s, 8)) {
return -1;
}
// XXX Should we store the state "authenticated" in the tag struct??
return 0;
}
int
mifare_desfire_authenticate (MifareTag tag, uint8_t key_no, MifareDESFireKey key)
{
ASSERT_ACTIVE (tag);
ASSERT_MIFARE_DESFIRE (tag);
MIFARE_DESFIRE (tag)->last_picc_error = OPERATION_OK;
MIFARE_DESFIRE (tag)->authenticated_key_no = NOT_YET_AUTHENTICATED;
free (MIFARE_DESFIRE (tag)->session_key);
MIFARE_DESFIRE (tag)->session_key = NULL;
BUFFER_INIT (cmd1, 2);
BUFFER_INIT (res, 9);
BUFFER_APPEND (cmd1, 0x0A);
BUFFER_APPEND (cmd1, key_no);
DESFIRE_TRANSCEIVE (tag, cmd1, res);
uint8_t PICC_E_RndB[8];
memcpy (PICC_E_RndB, res+1, 8);
uint8_t PICC_RndB[8];
memcpy (PICC_RndB, PICC_E_RndB, 8);
mifare_cbc_des (key, PICC_RndB, 8, MD_RECEIVE, 0);
uint8_t PCD_RndA[8];
DES_random_key ((DES_cblock*)&PCD_RndA);
uint8_t PCD_r_RndB[8];
memcpy (PCD_r_RndB, PICC_RndB, 8);
rol8 (PCD_r_RndB);
uint8_t token[16];
memcpy (token, PCD_RndA, 8);
memcpy (token+8, PCD_r_RndB, 8);
mifare_cbc_des (key, token, 16, MD_SEND, 0);
BUFFER_INIT (cmd2, 17);
BUFFER_APPEND (cmd2, 0xAF);
BUFFER_APPEND_BYTES (cmd2, token, 16);
DESFIRE_TRANSCEIVE (tag, cmd2, res);
uint8_t PICC_E_RndA_s[8];
memcpy (PICC_E_RndA_s, res+1, 8);
uint8_t PICC_RndA_s[8];
memcpy (PICC_RndA_s, PICC_E_RndA_s, 8);
mifare_cbc_des (key, PICC_RndA_s, 8, MD_RECEIVE, 0);
uint8_t PCD_RndA_s[8];
memcpy (PCD_RndA_s, PCD_RndA, 8);
rol8 (PCD_RndA_s);
if (0 != memcmp (PCD_RndA_s, PICC_RndA_s, 8)) {
printf ("PCD_RndA_s != PICC_RndA_s");
return -1;
}
MIFARE_DESFIRE (tag)->authenticated_key_no = key_no;
MIFARE_DESFIRE (tag)->session_key = mifare_desfire_session_key_new (PCD_RndA, PICC_RndB, key);
return 0;
}
