/
mifare_desfire.c
2098 lines (1588 loc) · 57 KB
/
mifare_desfire.c
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/*
* This implementation was written based on information provided by the
* following documents:
*
* Draft ISO/IEC FCD 14443-4
* Identification cards
* - Contactless integrated circuit(s) cards
* - Proximity cards
* - Part 4: Transmission protocol
* Final Committee Draft - 2000-03-10
*
* http://ridrix.wordpress.com/2009/09/19/mifare-desfire-communication-example/
*/
#if defined(HAVE_CONFIG_H)
#include "config.h"
#endif
#if defined(HAVE_SYS_TYPES_H)
#include <sys/types.h>
#endif
#if defined(HAVE_SYS_ENDIAN_H)
#include <sys/endian.h>
#endif
#if defined(HAVE_ENDIAN_H)
#include <endian.h>
#endif
#if defined(HAVE_COREFOUNDATION_COREFOUNDATION_H)
#include <CoreFoundation/CoreFoundation.h>
#endif
#if defined(HAVE_BYTESWAP_H)
#include <byteswap.h>
#endif
#include <errno.h>
#include <stdlib.h>
#include <string.h>
#include <strings.h>
#ifdef WITH_DEBUG
#include <libutil.h>
#endif
#include <openssl/rand.h>
#include <freefare.h>
#include "freefare_internal.h"
#pragma pack (push)
#pragma pack (1)
struct mifare_desfire_raw_file_settings {
uint8_t file_type;
uint8_t communication_settings;
uint16_t access_rights;
union {
struct {
uint8_t file_size[3];
} standard_file;
struct {
int32_t lower_limit;
int32_t upper_limit;
int32_t limited_credit_value;
uint8_t limited_credit_enabled;
} value_file;
struct {
uint8_t record_size[3];
uint8_t max_number_of_records[3];
uint8_t current_number_of_records[3];
} linear_record_file;
} settings;
};
#pragma pack (pop)
#define MAX_APPLICATION_COUNT 28
#define MAX_FILE_COUNT 32
#define CMAC_LENGTH 8
static struct mifare_desfire_file_settings cached_file_settings[MAX_FILE_COUNT];
static bool cached_file_settings_current[MAX_FILE_COUNT];
static int desfire_transceive(FreefareTag tag, const uint8_t *msg, size_t msg_len, uint8_t *res, size_t res_size, size_t *res_len);
static int authenticate(FreefareTag tag, uint8_t cmd, uint8_t key_no, MifareDESFireKey key);
static int create_file1(FreefareTag tag, uint8_t command, uint8_t file_no, int has_iso_file_id, uint16_t iso_file_id, uint8_t communication_settings, uint16_t access_rights, uint32_t file_size);
static int create_file2(FreefareTag tag, uint8_t command, uint8_t file_no, int has_iso_file_id, uint16_t iso_file_id, uint8_t communication_settings, uint16_t access_rights, uint32_t record_size, uint32_t max_number_of_records);
static ssize_t write_data(FreefareTag tag, uint8_t command, uint8_t file_no, off_t offset, size_t length, const void *data, int cs);
static ssize_t read_data(FreefareTag tag, uint8_t command, uint8_t file_no, off_t offset, size_t length, void *data, int cs);
#define NOT_YET_AUTHENTICATED 255
#define ASSERT_AUTHENTICATED(tag) \
do { \
if (MIFARE_DESFIRE (tag)->authenticated_key_no == NOT_YET_AUTHENTICATED) { \
return errno = EINVAL, -1;\
} \
} while (0)
/*
* XXX: cs < 0 is a CommunicationSettings detection error. Other values are
* user errors. We may need to distinguish them.
*/
#define ASSERT_CS(cs) \
do { \
if (cs < 0) { \
return errno = EINVAL, -1; \
} else if (cs == 0x02) { \
return errno = EINVAL, -1; \
} else if (cs > 0x03) { \
return errno = EINVAL, -1; \
} \
} while (0)
#define ASSERT_NOT_NULL(argument) \
do { \
if (!argument) { \
return errno = EINVAL, -1; \
} \
} while (0)
/* Native DESFire APDUs will be wrapped in ISO7816-4 APDUs:
CAPDUs will be 5 bytes longer (CLA+P1+P2+Lc+Le)
RAPDUs will be 1 byte longer (SW1 SW2 instead of 1 status byte)
Max APDU sizes to be ISO encapsulated by desfire_transceive()
From MIFARE DESFire Functional specification:
MAX_CAPDU_SIZE: "The length of the total wrapped DESFire
command is not longer than 55 byte long."
MAX_RAPDU_SIZE: 1 status byte + 59 bytes
*/
#define MAX_CAPDU_SIZE 55
#define MAX_RAPDU_SIZE 60
/*
* Transmit the message msg to the NFC tag and receive the response res. The
* response buffer's size is set according to the quantity of data received.
*
* The Mifare DESFire function return value which is returned at the end of the
* response is copied at the beginning to match the PICC documentation.
*/
static int
desfire_transceive(FreefareTag tag, const uint8_t *msg, size_t msg_len, uint8_t *res, size_t res_size, size_t *res_len)
{
uint8_t msg_buf[MAX_CAPDU_SIZE + 5];
uint8_t res_buf[MAX_RAPDU_SIZE + 1];
size_t len = 5;
int rc;
if (!msg) {
errno = EINVAL;
return -1;
}
memset (msg_buf, 0, sizeof(msg_buf));
msg_buf[0] = 0x90; // CLA
msg_buf[1] = msg[0]; // INS
// P1 & P2 is zero by default
if (msg_len > 1) {
len += msg_len;
msg_buf[4] = msg_len - 1; // Lc
memcpy (msg_buf + 5, msg + 1, msg_len - 1);
}
MIFARE_DESFIRE (tag)->last_picc_error = OPERATION_OK;
MIFARE_DESFIRE (tag)->last_pcd_error = OPERATION_OK;
DEBUG_XFER (msg_buf, len, "===> ");
if ((rc = nfc_initiator_transceive_bytes (tag->device, msg_buf, len, res_buf, sizeof(res_buf), tag->timeout)) < 2) {
errno = (errno == ETIMEDOUT) ? errno : EIO;
return -1;
}
DEBUG_XFER (res_buf, rc, "<=== ");
rc--;
if (rc > (int)res_size) {
errno = ENOBUFS;
return -1;
}
int lpe = res_buf[rc];
res[rc - 1] = lpe;
if ((1 == rc) && (ADDITIONAL_FRAME != res_buf[rc]) && (OPERATION_OK != res_buf[rc])) {
if (AUTHENTICATION_ERROR == lpe)
errno = EACCES;
MIFARE_DESFIRE (tag)->last_picc_error = lpe;
return -1;
}
if (res_len)
*res_len = rc;
memcpy (res, res_buf, rc - 1);
errno = 0;
return 0;
}
/*
* Convenience macros.
*/
#ifdef WITH_DEBUG
// define a small but cute wrapper to allow debug output
#define MIFARE_DESFIRE_TRANSCEIVE(tag, msg, msg_len, res, res_size, res_len) ({ \
int __err = 0; \
do { \
DEBUG_FUNCTION(); \
__err = desfire_transceive(tag, msg, msg_len, res, res_size, res_len); \
} while (0); \
__err; \
})
#else
#define MIFARE_DESFIRE_TRANSCEIVE desfire_transceive
#endif
/*
* Miscellaneous low-level memory manipulation functions.
*/
static int32_t le24toh(uint8_t data[3]);
static int
madame_soleil_get_read_communication_settings(FreefareTag tag, uint8_t file_no)
{
struct mifare_desfire_file_settings settings;
if (mifare_desfire_get_file_settings(tag, file_no, &settings))
return -1;
if ((MIFARE_DESFIRE(tag)->authenticated_key_no == MDAR_READ(settings.access_rights)) ||
(MIFARE_DESFIRE(tag)->authenticated_key_no == MDAR_READ_WRITE(settings.access_rights)))
return settings.communication_settings;
else
return 0;
}
static int
madame_soleil_get_write_communication_settings(FreefareTag tag, uint8_t file_no)
{
struct mifare_desfire_file_settings settings;
if (mifare_desfire_get_file_settings(tag, file_no, &settings))
return -1;
if ((MIFARE_DESFIRE(tag)->authenticated_key_no == MDAR_WRITE(settings.access_rights)) ||
(MIFARE_DESFIRE(tag)->authenticated_key_no == MDAR_READ_WRITE(settings.access_rights)))
return settings.communication_settings;
else
return 0;
}
static int32_t
le24toh(uint8_t data[3])
{
return (data[2] << 16) | (data[1] << 8) | data[0];
}
bool
mifare_desfire_taste(nfc_device *device, nfc_target target)
{
// We have three different ATS prefixes to
// check for, standalone, JCOP and JCOP3.
static const char STANDALONE_DESFIRE[] = { 0x75, 0x77, 0x81, 0x02 };
static const char JCOP_DESFIRE[] = { 0x75, 0xf7, 0xb1, 0x02 };
static const char JCOP3_DESFIRE[] = { 0x78, 0x77, 0x71, 0x02 };
(void) device;
return target.nm.nmt == NMT_ISO14443A &&
target.nti.nai.btSak == 0x20 && ((
target.nti.nai.szAtsLen >= 5 && (
memcmp(target.nti.nai.abtAts, STANDALONE_DESFIRE, sizeof(STANDALONE_DESFIRE)) == 0 ||
memcmp(target.nti.nai.abtAts, JCOP_DESFIRE, sizeof(JCOP_DESFIRE)) == 0))
|| (target.nti.nai.szAtsLen == 4 &&
memcmp(target.nti.nai.abtAts, JCOP3_DESFIRE, sizeof(JCOP3_DESFIRE)) == 0));
}
/*
* Memory management functions.
*/
/*
* Allocates and initialize a MIFARE DESFire tag.
*/
FreefareTag
mifare_desfire_tag_new(nfc_device *device, nfc_target target)
{
FreefareTag tag;
if ((tag = malloc(sizeof(struct mifare_desfire_tag)))) {
MIFARE_DESFIRE(tag)->last_picc_error = OPERATION_OK;
MIFARE_DESFIRE(tag)->last_pcd_error = OPERATION_OK;
MIFARE_DESFIRE(tag)->session_key = NULL;
MIFARE_DESFIRE(tag)->crypto_buffer = NULL;
MIFARE_DESFIRE(tag)->crypto_buffer_size = 0;
tag->type = MIFARE_DESFIRE;
tag->free_tag = mifare_desfire_tag_free;
tag->device = device;
tag->info = target;
tag->active = 0;
}
return tag;
}
/*
* Free the provided tag.
*/
void
mifare_desfire_tag_free(FreefareTag tag)
{
free(MIFARE_DESFIRE(tag)->session_key);
free(MIFARE_DESFIRE(tag)->crypto_buffer);
free(tag);
}
/*
* MIFARE card communication preparation functions
*
* The following functions send NFC commands to the initiator to prepare
* communication with a MIFARE card, and perform required cleannups after using
* the target.
*/
/*
* Establish connection to the provided tag.
*/
int
mifare_desfire_connect(FreefareTag tag)
{
ASSERT_INACTIVE(tag);
nfc_target pnti;
nfc_modulation modulation = {
.nmt = NMT_ISO14443A,
.nbr = NBR_424
};
if (nfc_initiator_select_passive_target(tag->device, modulation, tag->info.nti.nai.abtUid, tag->info.nti.nai.szUidLen, &pnti) >= 0) {
// The registered ISO AID of DESFire D2760000850100
// Selecting this AID selects the MF
BUFFER_INIT(cmd, 12);
BUFFER_INIT(res, 2);
BUFFER_APPEND(cmd, 0x00);
BUFFER_APPEND(cmd, 0xa4);
BUFFER_APPEND(cmd, 0x04);
BUFFER_APPEND(cmd, 0x00);
uint8_t AID[] = { 0xd2, 0x76, 0x00, 0x00, 0x85, 0x01, 0x00};
BUFFER_APPEND(cmd, sizeof(AID));
BUFFER_APPEND_BYTES(cmd, AID, sizeof(AID));
if ((nfc_initiator_transceive_bytes(tag->device, cmd, BUFFER_SIZE(cmd), res, BUFFER_MAXSIZE(cmd), tag->timeout) < 0) || (res[0] != 0x90 || res[1] != 0x00)) {
errno = (errno == ETIMEDOUT) ? errno : EIO;
return -1;
}
tag->active = 1;
free(MIFARE_DESFIRE(tag)->session_key);
MIFARE_DESFIRE(tag)->session_key = NULL;
MIFARE_DESFIRE(tag)->last_picc_error = OPERATION_OK;
MIFARE_DESFIRE(tag)->last_pcd_error = OPERATION_OK;
MIFARE_DESFIRE(tag)->authenticated_key_no = NOT_YET_AUTHENTICATED;
MIFARE_DESFIRE(tag)->selected_application = 0;
} else {
errno = EIO;
return -1;
}
return 0;
}
/*
* Terminate connection with the provided tag.
*/
int
mifare_desfire_disconnect(FreefareTag tag)
{
ASSERT_ACTIVE(tag);
free(MIFARE_DESFIRE(tag)->session_key);
MIFARE_DESFIRE(tag)->session_key = NULL;
if (nfc_initiator_deselect_target(tag->device) >= 0) {
tag->active = 0;
}
return 0;
}
#define AUTHENTICATE_LEGACY 0x0A
#define AUTHENTICATE_ISO 0x1A
#define AUTHENTICATE_AES 0xAA
static int
authenticate(FreefareTag tag, uint8_t cmd, uint8_t key_no, MifareDESFireKey key)
{
int rc;
ASSERT_ACTIVE(tag);
memset(MIFARE_DESFIRE(tag)->ivect, 0, MAX_CRYPTO_BLOCK_SIZE);
MIFARE_DESFIRE(tag)->authenticated_key_no = NOT_YET_AUTHENTICATED;
free(MIFARE_DESFIRE(tag)->session_key);
MIFARE_DESFIRE(tag)->session_key = NULL;
MIFARE_DESFIRE(tag)->authentication_scheme = (AUTHENTICATE_LEGACY == cmd) ? AS_LEGACY : AS_NEW;
BUFFER_INIT(cmd1, 2);
BUFFER_INIT(res, 17);
BUFFER_APPEND(cmd1, cmd);
BUFFER_APPEND(cmd1, key_no);
if ((rc = MIFARE_DESFIRE_TRANSCEIVE(tag, cmd1, __cmd1_n, res, __res_size, &__res_n)) < 0)
return rc;
size_t key_length = __res_n - 1;
uint8_t PICC_E_RndB[16];
memcpy(PICC_E_RndB, res, key_length);
uint8_t PICC_RndB[16];
memcpy(PICC_RndB, PICC_E_RndB, key_length);
mifare_cypher_blocks_chained(tag, key, MIFARE_DESFIRE(tag)->ivect, PICC_RndB, key_length, MCD_RECEIVE, MCO_DECYPHER);
uint8_t PCD_RndA[16];
RAND_bytes(PCD_RndA, 16);
uint8_t PCD_r_RndB[16];
memcpy(PCD_r_RndB, PICC_RndB, key_length);
rol(PCD_r_RndB, key_length);
uint8_t token[32];
memcpy(token, PCD_RndA, key_length);
memcpy(token + key_length, PCD_r_RndB, key_length);
mifare_cypher_blocks_chained(tag, key, MIFARE_DESFIRE(tag)->ivect, token, 2 * key_length, MCD_SEND, (AUTHENTICATE_LEGACY == cmd) ? MCO_DECYPHER : MCO_ENCYPHER);
BUFFER_INIT(cmd2, 33);
BUFFER_APPEND(cmd2, 0xAF);
BUFFER_APPEND_BYTES(cmd2, token, 2 * key_length);
if ((rc = MIFARE_DESFIRE_TRANSCEIVE(tag, cmd2, __cmd2_n, res, __res_size, &__res_n)) < 0)
return rc;
uint8_t PICC_E_RndA_s[16];
memcpy(PICC_E_RndA_s, res, key_length);
uint8_t PICC_RndA_s[16];
memcpy(PICC_RndA_s, PICC_E_RndA_s, key_length);
mifare_cypher_blocks_chained(tag, key, MIFARE_DESFIRE(tag)->ivect, PICC_RndA_s, key_length, MCD_RECEIVE, MCO_DECYPHER);
uint8_t PCD_RndA_s[key_length];
memcpy(PCD_RndA_s, PCD_RndA, key_length);
rol(PCD_RndA_s, key_length);
if (0 != memcmp(PCD_RndA_s, PICC_RndA_s, key_length)) {
#ifdef WITH_DEBUG
hexdump(PCD_RndA_s, key_length, "PCD ", 0);
hexdump(PICC_RndA_s, key_length, "PICC ", 0);
#endif
errno = EACCES;
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);
memset(MIFARE_DESFIRE(tag)->ivect, 0, MAX_CRYPTO_BLOCK_SIZE);
switch (MIFARE_DESFIRE(tag)->authentication_scheme) {
case AS_LEGACY:
break;
case AS_NEW:
cmac_generate_subkeys(MIFARE_DESFIRE(tag)->session_key);
break;
}
return 0;
}
int
mifare_desfire_authenticate(FreefareTag tag, uint8_t key_no, MifareDESFireKey key)
{
switch (key->type) {
case MIFARE_KEY_DES:
case MIFARE_KEY_2K3DES:
return authenticate(tag, AUTHENTICATE_LEGACY, key_no, key);
break;
case MIFARE_KEY_3K3DES:
return authenticate(tag, AUTHENTICATE_ISO, key_no, key);
break;
case MIFARE_KEY_AES128:
return authenticate(tag, AUTHENTICATE_AES, key_no, key);
break;
}
return -1; /* NOTREACHED */
}
int
mifare_desfire_authenticate_iso(FreefareTag tag, uint8_t key_no, MifareDESFireKey key)
{
return authenticate(tag, AUTHENTICATE_ISO, key_no, key);
}
int
mifare_desfire_authenticate_aes(FreefareTag tag, uint8_t key_no, MifareDESFireKey key)
{
return authenticate(tag, AUTHENTICATE_AES, key_no, key);
}
int
mifare_desfire_change_key_settings(FreefareTag tag, uint8_t settings)
{
int rc;
ASSERT_ACTIVE(tag);
ASSERT_AUTHENTICATED(tag);
BUFFER_INIT(cmd, 9 + CMAC_LENGTH);
BUFFER_INIT(res, 1 + CMAC_LENGTH);
BUFFER_APPEND(cmd, 0x54);
BUFFER_APPEND(cmd, settings);
uint8_t *p = mifare_cryto_preprocess_data(tag, cmd, &__cmd_n, 1, MDCM_ENCIPHERED | ENC_COMMAND);
if ((rc = MIFARE_DESFIRE_TRANSCEIVE(tag, p, __cmd_n, res, __res_size, &__res_n)) < 0)
return rc;
ssize_t n = __res_n;
p = mifare_cryto_postprocess_data(tag, res, &n, MDCM_PLAIN | CMAC_COMMAND | CMAC_VERIFY | MAC_COMMAND | MAC_VERIFY);
if (!p)
return errno = EINVAL, -1;
return 0;
}
int
mifare_desfire_get_key_settings(FreefareTag tag, uint8_t *settings, uint8_t *max_keys)
{
int rc;
ASSERT_ACTIVE(tag);
BUFFER_INIT(cmd, 1);
BUFFER_INIT(res, 3 + CMAC_LENGTH);
BUFFER_APPEND(cmd, 0x45);
uint8_t *p = mifare_cryto_preprocess_data(tag, cmd, &__cmd_n, 1, MDCM_PLAIN | CMAC_COMMAND);
if ((rc = MIFARE_DESFIRE_TRANSCEIVE(tag, cmd, __cmd_n, res, __res_size, &__res_n)) < 0)
return rc;
ssize_t n = __res_n;
p = mifare_cryto_postprocess_data(tag, res, &n, MDCM_PLAIN | CMAC_COMMAND | CMAC_VERIFY);
if (!p)
return errno = EINVAL, -1;
if (settings)
*settings = p[0];
if (max_keys)
*max_keys = p[1] & 0x0F;
return 0;
}
int
mifare_desfire_change_key(FreefareTag tag, uint8_t key_no, MifareDESFireKey new_key, MifareDESFireKey old_key)
{
int rc;
ASSERT_ACTIVE(tag);
ASSERT_AUTHENTICATED(tag);
BUFFER_INIT(cmd, 42);
BUFFER_INIT(res, 1 + CMAC_LENGTH);
key_no &= 0x0F;
/*
* Because new crypto methods can be setup only at application creation,
* changing the card master key to one of them require a key_no tweak.
*/
if (0x000000 == MIFARE_DESFIRE(tag)->selected_application) {
switch (new_key->type) {
case MIFARE_KEY_DES:
case MIFARE_KEY_2K3DES:
break;
case MIFARE_KEY_3K3DES:
key_no |= 0x40;
break;
case MIFARE_KEY_AES128:
key_no |= 0x80;
break;
}
}
BUFFER_APPEND(cmd, 0xC4);
BUFFER_APPEND(cmd, key_no);
int new_key_length;
switch (new_key->type) {
case MIFARE_KEY_DES:
case MIFARE_KEY_2K3DES:
case MIFARE_KEY_AES128:
new_key_length = 16;
break;
case MIFARE_KEY_3K3DES:
new_key_length = 24;
break;
}
memcpy(cmd + __cmd_n, new_key->data, new_key_length);
if ((MIFARE_DESFIRE(tag)->authenticated_key_no & 0x0f) != (key_no & 0x0f)) {
if (old_key) {
for (int n = 0; n < new_key_length; n++) {
cmd[__cmd_n + n] ^= old_key->data[n];
}
}
}
__cmd_n += new_key_length;
if (new_key->type == MIFARE_KEY_AES128)
cmd[__cmd_n++] = new_key->aes_version;
if ((MIFARE_DESFIRE(tag)->authenticated_key_no & 0x0f) != (key_no & 0x0f)) {
switch (MIFARE_DESFIRE(tag)->authentication_scheme) {
case AS_LEGACY:
iso14443a_crc_append(cmd + 2, __cmd_n - 2);
__cmd_n += 2;
iso14443a_crc(new_key->data, new_key_length, cmd + __cmd_n);
__cmd_n += 2;
break;
case AS_NEW:
desfire_crc32_append(cmd, __cmd_n);
__cmd_n += 4;
desfire_crc32(new_key->data, new_key_length, cmd + __cmd_n);
__cmd_n += 4;
break;
}
} else {
switch (MIFARE_DESFIRE(tag)->authentication_scheme) {
case AS_LEGACY:
iso14443a_crc_append(cmd + 2, __cmd_n - 2);
__cmd_n += 2;
break;
case AS_NEW:
desfire_crc32_append(cmd, __cmd_n);
__cmd_n += 4;
break;
}
}
uint8_t *p = mifare_cryto_preprocess_data(tag, cmd, &__cmd_n, 2, MDCM_ENCIPHERED | ENC_COMMAND | NO_CRC);
if ((rc = MIFARE_DESFIRE_TRANSCEIVE(tag, p, __cmd_n, res, __res_size, &__res_n)) < 0)
return rc;
ssize_t sn = __res_n;
p = mifare_cryto_postprocess_data(tag, res, &sn, MDCM_PLAIN | CMAC_COMMAND | CMAC_VERIFY);
if (!p)
return errno = EINVAL, -1;
/*
* If we changed the current authenticated key, we are not authenticated
* anymore.
*/
if (key_no == MIFARE_DESFIRE(tag)->authenticated_key_no) {
free(MIFARE_DESFIRE(tag)->session_key);
MIFARE_DESFIRE(tag)->session_key = NULL;
}
return 0;
}
/*
* Retrieve version information for a given key.
*/
int
mifare_desfire_get_key_version(FreefareTag tag, uint8_t key_no, uint8_t *version)
{
int rc;
ASSERT_ACTIVE(tag);
ASSERT_NOT_NULL(version);
BUFFER_INIT(cmd, 2);
BUFFER_APPEND(cmd, 0x64);
BUFFER_APPEND(cmd, key_no);
BUFFER_INIT(res, 2 + CMAC_LENGTH);
uint8_t *p = mifare_cryto_preprocess_data(tag, cmd, &__cmd_n, 0, MDCM_PLAIN | CMAC_COMMAND);
if ((rc = MIFARE_DESFIRE_TRANSCEIVE(tag, p, __cmd_n, res, __res_size, &__res_n)) < 0)
return rc;
ssize_t sn = __res_n;
p = mifare_cryto_postprocess_data(tag, res, &sn, MDCM_PLAIN | CMAC_COMMAND | CMAC_VERIFY | MAC_VERIFY);
if (!p)
return errno = EINVAL, -1;
*version = p[0];
return 0;
}
static int
create_application(FreefareTag tag, MifareDESFireAID aid, uint8_t settings1, uint8_t settings2, int want_iso_application, int want_iso_file_identifiers, uint16_t iso_file_id, uint8_t *iso_file_name, size_t iso_file_name_len)
{
int rc;
ASSERT_ACTIVE(tag);
BUFFER_INIT(cmd, 22);
BUFFER_INIT(res, 1 + CMAC_LENGTH);
if (want_iso_file_identifiers)
settings2 |= 0x20;
BUFFER_APPEND(cmd, 0xCA);
BUFFER_APPEND_LE(cmd, aid->data, sizeof(aid->data), sizeof(aid->data));
BUFFER_APPEND(cmd, settings1);
BUFFER_APPEND(cmd, settings2);
if (want_iso_application)
BUFFER_APPEND_LE(cmd, iso_file_id, sizeof(iso_file_id), sizeof(iso_file_id));
if (iso_file_name_len)
BUFFER_APPEND_BYTES(cmd, iso_file_name, iso_file_name_len);
uint8_t *p = mifare_cryto_preprocess_data(tag, cmd, &__cmd_n, 0, MDCM_PLAIN | CMAC_COMMAND);
if ((rc = MIFARE_DESFIRE_TRANSCEIVE(tag, p, __cmd_n, res, __res_size, &__res_n)) < 0)
return rc;
ssize_t sn = __res_n;
p = mifare_cryto_postprocess_data(tag, res, &sn, MDCM_PLAIN | CMAC_COMMAND | CMAC_VERIFY | MAC_VERIFY);
if (!p)
return errno = EINVAL, -1;
return 0;
}
int
mifare_desfire_create_application(FreefareTag tag, MifareDESFireAID aid, uint8_t settings, uint8_t key_no)
{
return create_application(tag, aid, settings, key_no, 0, 0, 0, NULL, 0);
}
int
mifare_desfire_create_application_iso(FreefareTag tag, MifareDESFireAID aid, uint8_t settings, uint8_t key_no, int want_iso_file_identifiers, uint16_t iso_file_id, uint8_t *iso_file_name, size_t iso_file_name_len)
{
return create_application(tag, aid, settings, key_no, 1, want_iso_file_identifiers, iso_file_id, iso_file_name, iso_file_name_len);
}
int
mifare_desfire_create_application_3k3des(FreefareTag tag, MifareDESFireAID aid, uint8_t settings, uint8_t key_no)
{
return create_application(tag, aid, settings, APPLICATION_CRYPTO_3K3DES | key_no, 0, 0, 0, NULL, 0);
}
int
mifare_desfire_create_application_3k3des_iso(FreefareTag tag, MifareDESFireAID aid, uint8_t settings, uint8_t key_no, int want_iso_file_identifiers, uint16_t iso_file_id, uint8_t *iso_file_name, size_t iso_file_name_len)
{
return create_application(tag, aid, settings, APPLICATION_CRYPTO_3K3DES | key_no, 1, want_iso_file_identifiers, iso_file_id, iso_file_name, iso_file_name_len);
}
int
mifare_desfire_create_application_aes(FreefareTag tag, MifareDESFireAID aid, uint8_t settings, uint8_t key_no)
{
return create_application(tag, aid, settings, APPLICATION_CRYPTO_AES | key_no, 0, 0, 0, NULL, 0);
}
int
mifare_desfire_create_application_aes_iso(FreefareTag tag, MifareDESFireAID aid, uint8_t settings, uint8_t key_no, int want_iso_file_identifiers, uint16_t iso_file_id, uint8_t *iso_file_name, size_t iso_file_name_len)
{
return create_application(tag, aid, settings, APPLICATION_CRYPTO_AES | key_no, 1, want_iso_file_identifiers, iso_file_id, iso_file_name, iso_file_name_len);
}
int
mifare_desfire_delete_application(FreefareTag tag, MifareDESFireAID aid)
{
int rc;
ASSERT_ACTIVE(tag);
BUFFER_INIT(cmd, 4 + CMAC_LENGTH);
BUFFER_INIT(res, 1 + CMAC_LENGTH);
BUFFER_APPEND(cmd, 0xDA);
BUFFER_APPEND_LE(cmd, aid->data, sizeof(aid->data), sizeof(aid->data));
uint8_t *p = mifare_cryto_preprocess_data(tag, cmd, &__cmd_n, 0, MDCM_PLAIN | CMAC_COMMAND);
if ((rc = MIFARE_DESFIRE_TRANSCEIVE(tag, p, __cmd_n, res, __res_size, &__res_n)) < 0)
return rc;
ssize_t sn = __res_n;
p = mifare_cryto_postprocess_data(tag, res, &sn, MDCM_PLAIN | CMAC_COMMAND | CMAC_VERIFY);
if (!p)
return errno = EINVAL, -1;
/*
* If we have deleted the current application, we are not authenticated
* anymore.
*/
if (MIFARE_DESFIRE(tag)->selected_application == (uint32_t)(aid->data[0] | aid->data[1] << 8 | aid->data[2] << 16)) {
free(MIFARE_DESFIRE(tag)->session_key);
MIFARE_DESFIRE(tag)->session_key = NULL;
MIFARE_DESFIRE(tag)->selected_application = 0x000000;
}
return 0;
}
int
mifare_desfire_get_application_ids(FreefareTag tag, MifareDESFireAID *aids[], size_t *count)
{
int rc;
ASSERT_ACTIVE(tag);
BUFFER_INIT(cmd, 1);
BUFFER_INIT(res, MAX_RAPDU_SIZE);
BUFFER_APPEND(cmd, 0x6A);
uint8_t buffer[3 * MAX_APPLICATION_COUNT + CMAC_LENGTH + 1];
*count = 0;
uint8_t *p = mifare_cryto_preprocess_data(tag, cmd, &__cmd_n, 0, MDCM_PLAIN | CMAC_COMMAND);
if ((rc = MIFARE_DESFIRE_TRANSCEIVE(tag, p, __cmd_n, res, __res_size, &__res_n)) < 0)
return rc;
// FIXME This code needs refactoring!
memcpy(buffer, res, __res_n);
if (res[__res_n - 1] == 0xAF) {
off_t offset = __res_n - 1;
p[0] = 0xAF;
if ((rc = MIFARE_DESFIRE_TRANSCEIVE(tag, p, __cmd_n, res, __res_size, &__res_n)) < 0)
return rc;
memcpy((uint8_t *)buffer + offset, res, __res_n);
__res_n += offset;
}
ssize_t sn = __res_n;
p = mifare_cryto_postprocess_data(tag, buffer, &sn, MDCM_PLAIN | CMAC_COMMAND | CMAC_VERIFY | MAC_VERIFY);
if (!p)
return errno = EINVAL, -1;
*count = (sn - 1) / 3;
if (!(*aids = malloc((*count + 1) * sizeof(MifareDESFireAID))))
return -1;
for (size_t i = 0; i < *count; i++) {
if (!((*aids)[i] = memdup(p + 3 * i, 3))) {
while (i--) {
free((*aids)[i]);
}
free(aids);
return -1;
}
}
(*aids)[*count] = NULL;
return 0;
}
int
mifare_desfire_get_df_names(FreefareTag tag, MifareDESFireDF *dfs[], size_t *count)
{
int rc;
ASSERT_ACTIVE(tag);
*count = 0;
*dfs = NULL;
BUFFER_INIT(cmd, 1);
BUFFER_INIT(res, 22 + CMAC_LENGTH);
BUFFER_APPEND(cmd, 0x6D);
uint8_t *p = mifare_cryto_preprocess_data(tag, cmd, &__cmd_n, 0, MDCM_PLAIN | CMAC_COMMAND);
do {
if ((rc = MIFARE_DESFIRE_TRANSCEIVE(tag, p, __cmd_n, res, __res_size, &__res_n)) < 0)
return rc;
if (__res_n > 1) {
MifareDESFireDF *new_dfs;
if ((new_dfs = realloc(*dfs, sizeof(*new_dfs) * (*count + 1)))) {
new_dfs[*count].aid = le24toh(res);
new_dfs[*count].fid = le16toh(*(uint16_t *)(res + 3));
memcpy(new_dfs[*count].df_name, res + 5, __res_n - 6);
new_dfs[*count].df_name_len = __res_n - 6;
*dfs = new_dfs;
*count += 1;
}
}
p[0] = 0XAF;
} while (res[__res_n - 1] == 0xAF);
return 0;
}
void
mifare_desfire_free_application_ids(MifareDESFireAID aids[])
{
for (int i = 0; aids[i]; i++)
free(aids[i]);
free(aids);
}
/*
* 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(FreefareTag tag, MifareDESFireAID aid)
{
int rc;
ASSERT_ACTIVE(tag);
struct mifare_desfire_aid null_aid = { .data = { 0x00, 0x00, 0x00 } };
if (!aid) {
aid = &null_aid;
}
BUFFER_INIT(cmd, 4 + CMAC_LENGTH);
BUFFER_INIT(res, 1 + CMAC_LENGTH);
BUFFER_APPEND(cmd, 0x5A);
BUFFER_APPEND_LE(cmd, aid->data, sizeof(aid->data), sizeof(aid->data));
uint8_t *p = mifare_cryto_preprocess_data(tag, cmd, &__cmd_n, 0, MDCM_PLAIN | CMAC_COMMAND);
if ((rc = MIFARE_DESFIRE_TRANSCEIVE(tag, p, __cmd_n, res, __res_size, &__res_n)) < 0)
return rc;
ssize_t sn = __res_n;
p = mifare_cryto_postprocess_data(tag, res, &sn, MDCM_PLAIN | CMAC_COMMAND);
if (!p)
return errno = EINVAL, -1;
for (int n = 0; n < MAX_FILE_COUNT; n++)
cached_file_settings_current[n] = false;
free(MIFARE_DESFIRE(tag)->session_key);
MIFARE_DESFIRE(tag)->session_key = NULL;
MIFARE_DESFIRE(tag)->selected_application = aid->data[0] | aid->data[1] << 8 | aid->data[2] << 16;
return 0;
}
int
mifare_desfire_format_picc(FreefareTag tag)
{
int rc;
ASSERT_ACTIVE(tag);
ASSERT_AUTHENTICATED(tag);
BUFFER_INIT(cmd, 1 + CMAC_LENGTH);
BUFFER_INIT(res, 1 + CMAC_LENGTH);