2 /* Mifare Classic implementation, PCD side.
4 * (C) 2005-2006 by Harald Welte <laforge@gnumonks.org>
9 * This program is free software; you can redistribute it and/or modify
10 * it under the terms of the GNU General Public License version 2
11 * as published by the Free Software Foundation
13 * This program is distributed in the hope that it will be useful,
14 * but WITHOUT ANY WARRANTY; without even the implied warranty of
15 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
16 * GNU General Public License for more details.
18 * You should have received a copy of the GNU General Public License
19 * along with this program; if not, write to the Free Software
20 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA
28 #include <librfid/rfid.h>
29 #include <librfid/rfid_protocol.h>
30 #include <librfid/rfid_layer2.h>
31 #include <librfid/rfid_protocol_mifare_classic.h>
33 #include <librfid/rfid_reader.h>
35 #include "rfid_iso14443_common.h"
38 #define MIFARE_UL_CMD_WRITE 0xA2
39 #define MIFARE_UL_CMD_READ 0x30
42 #define MIFARE_CL_READ_FWT 100
43 #define MIFARE_CL_WRITE_FWT 100
46 mfcl_read(struct rfid_protocol_handle *ph, unsigned int page,
47 unsigned char *rx_data, unsigned int *rx_len)
49 unsigned char rx_buf[16];
50 unsigned int real_rx_len = sizeof(rx_buf);
54 if (page > MIFARE_CL_PAGE_MAX)
57 tx[0] = MIFARE_CL_CMD_READ;
60 ret = rfid_layer2_transceive(ph->l2h, RFID_MIFARE_FRAME, tx,
61 sizeof(tx), rx_buf, &real_rx_len,
62 MIFARE_CL_READ_FWT, 0);
67 if (real_rx_len == 1 && *rx_buf == 0x04)
70 if (real_rx_len < *rx_len)
71 *rx_len = real_rx_len;
73 memcpy(rx_data, rx_buf, *rx_len);
79 mfcl_write(struct rfid_protocol_handle *ph, unsigned int page,
80 unsigned char *tx_data, unsigned int tx_len)
84 unsigned int rx_len = sizeof(rx);
87 if (page > MIFARE_CL_PAGE_MAX)
90 if (tx_len != 16 && tx_len != 4)
94 tx[0] = MIFARE_CL_CMD_WRITE16;
97 ret = rfid_layer2_transceive(ph->l2h, RFID_MIFARE_FRAME, tx,
99 MIFARE_CL_WRITE_FWT, 0);
103 ret = rfid_layer2_transceive(ph->l2h, RFID_MIFARE_FRAME, tx_data,
105 MIFARE_CL_WRITE_FWT, 0);
109 if (rx[0] != MIFARE_UL_RESP_ACK)
112 ret = rfid_layer2_transceive(ph->l2h, RFID_MIFARE_FRAME, tx,
113 sizeof(tx), rx, &rx_len,
114 MIFARE_CL_WRITE_FWT, 0);
118 if (rx[0] != MIFARE_UL_RESP_ACK)
121 } else if (tx_len == 4) {
123 tx[0] = MIFARE_CL_CMD_WRITE4;
126 memcpy(tx+2, tx_data, 4);
128 ret = rfid_layer2_transceive(ph->l2h, RFID_MIFARE_FRAME, tx,
130 MIFARE_CL_WRITE_FWT, 0);
134 if (rx[0] != MIFARE_UL_RESP_ACK)
143 mfcl_getopt(struct rfid_protocol_handle *ph, int optname, void *optval,
144 unsigned int *optlen)
148 unsigned int atqa_size = sizeof(atqa);
149 unsigned int *size = optval;
152 case RFID_OPT_PROTO_SIZE:
153 if (*optlen < sizeof(*size))
155 *optlen = sizeof(*size);
157 rfid_layer2_getopt(ph->l2h, RFID_OPT_14443A_ATQA,
159 if (atqa[0] == 0x04 && atqa[1] == 0x00)
161 else if (atqa[0] == 0x02 && atqa[1] == 0x00)
171 static struct rfid_protocol_handle *
172 mfcl_init(struct rfid_layer2_handle *l2h)
174 struct rfid_protocol_handle *ph;
176 if (l2h->l2->id != RFID_LAYER2_ISO14443A)
179 if (l2h->uid_len != 4)
182 ph = malloc_protocol_handle(sizeof(struct rfid_protocol_handle));
186 static int mfcl_fini(struct rfid_protocol_handle *ph)
188 free_protocol_handle(ph);
192 const struct rfid_protocol rfid_protocol_mfcl = {
193 .id = RFID_PROTOCOL_MIFARE_CLASSIC,
194 .name = "Mifare Classic",
198 .write = &mfcl_write,
200 .getopt = &mfcl_getopt,
204 int mfcl_set_key(struct rfid_protocol_handle *ph, unsigned char *key)
206 if (!ph->l2h->rh->reader->mifare_classic.setkey)
209 return ph->l2h->rh->reader->mifare_classic.setkey(ph->l2h->rh, key);
212 int mfcl_auth(struct rfid_protocol_handle *ph, u_int8_t cmd, u_int8_t block)
214 u_int32_t serno = *((u_int32_t *)ph->l2h->uid);
216 if (!ph->l2h->rh->reader->mifare_classic.auth)
219 return ph->l2h->rh->reader->mifare_classic.auth(ph->l2h->rh, cmd,