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Add desfire reading

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This commit is contained in:
Edith Boles
2026-03-05 02:29:39 -08:00
parent cce87178ca
commit 3b8e70c524
5 changed files with 227 additions and 47 deletions
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8
inc/crc32.h Normal file
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@@ -0,0 +1,8 @@
#ifndef CRC32_H_I5S4G2OH
#define CRC32_H_I5S4G2OH
#include <stdint.h>
uint32_t crc32(uint8_t *buffer, uint16_t len);
#endif /* end of include guard: CRC32_H_I5S4G2OH */

6
inc/crc8.h Normal file
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@@ -0,0 +1,6 @@
#ifndef CRC8_H_2PZB4QST
#define CRC8_H_2PZB4QST
unsigned char crc8(const unsigned char * data, const unsigned int size);
#endif /* end of include guard: CRC8_H_2PZB4QST */

85
src/crc32.c Normal file
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@@ -0,0 +1,85 @@
// https://gist.github.com/xobs/91a84d29152161e973d717b9be84c4d0
#include <stdint.h>
static const unsigned int crc_table[256] = {
0x00000000L, 0x77073096L, 0xee0e612cL, 0x990951baL, 0x076dc419L,
0x706af48fL, 0xe963a535L, 0x9e6495a3L, 0x0edb8832L, 0x79dcb8a4L,
0xe0d5e91eL, 0x97d2d988L, 0x09b64c2bL, 0x7eb17cbdL, 0xe7b82d07L,
0x90bf1d91L, 0x1db71064L, 0x6ab020f2L, 0xf3b97148L, 0x84be41deL,
0x1adad47dL, 0x6ddde4ebL, 0xf4d4b551L, 0x83d385c7L, 0x136c9856L,
0x646ba8c0L, 0xfd62f97aL, 0x8a65c9ecL, 0x14015c4fL, 0x63066cd9L,
0xfa0f3d63L, 0x8d080df5L, 0x3b6e20c8L, 0x4c69105eL, 0xd56041e4L,
0xa2677172L, 0x3c03e4d1L, 0x4b04d447L, 0xd20d85fdL, 0xa50ab56bL,
0x35b5a8faL, 0x42b2986cL, 0xdbbbc9d6L, 0xacbcf940L, 0x32d86ce3L,
0x45df5c75L, 0xdcd60dcfL, 0xabd13d59L, 0x26d930acL, 0x51de003aL,
0xc8d75180L, 0xbfd06116L, 0x21b4f4b5L, 0x56b3c423L, 0xcfba9599L,
0xb8bda50fL, 0x2802b89eL, 0x5f058808L, 0xc60cd9b2L, 0xb10be924L,
0x2f6f7c87L, 0x58684c11L, 0xc1611dabL, 0xb6662d3dL, 0x76dc4190L,
0x01db7106L, 0x98d220bcL, 0xefd5102aL, 0x71b18589L, 0x06b6b51fL,
0x9fbfe4a5L, 0xe8b8d433L, 0x7807c9a2L, 0x0f00f934L, 0x9609a88eL,
0xe10e9818L, 0x7f6a0dbbL, 0x086d3d2dL, 0x91646c97L, 0xe6635c01L,
0x6b6b51f4L, 0x1c6c6162L, 0x856530d8L, 0xf262004eL, 0x6c0695edL,
0x1b01a57bL, 0x8208f4c1L, 0xf50fc457L, 0x65b0d9c6L, 0x12b7e950L,
0x8bbeb8eaL, 0xfcb9887cL, 0x62dd1ddfL, 0x15da2d49L, 0x8cd37cf3L,
0xfbd44c65L, 0x4db26158L, 0x3ab551ceL, 0xa3bc0074L, 0xd4bb30e2L,
0x4adfa541L, 0x3dd895d7L, 0xa4d1c46dL, 0xd3d6f4fbL, 0x4369e96aL,
0x346ed9fcL, 0xad678846L, 0xda60b8d0L, 0x44042d73L, 0x33031de5L,
0xaa0a4c5fL, 0xdd0d7cc9L, 0x5005713cL, 0x270241aaL, 0xbe0b1010L,
0xc90c2086L, 0x5768b525L, 0x206f85b3L, 0xb966d409L, 0xce61e49fL,
0x5edef90eL, 0x29d9c998L, 0xb0d09822L, 0xc7d7a8b4L, 0x59b33d17L,
0x2eb40d81L, 0xb7bd5c3bL, 0xc0ba6cadL, 0xedb88320L, 0x9abfb3b6L,
0x03b6e20cL, 0x74b1d29aL, 0xead54739L, 0x9dd277afL, 0x04db2615L,
0x73dc1683L, 0xe3630b12L, 0x94643b84L, 0x0d6d6a3eL, 0x7a6a5aa8L,
0xe40ecf0bL, 0x9309ff9dL, 0x0a00ae27L, 0x7d079eb1L, 0xf00f9344L,
0x8708a3d2L, 0x1e01f268L, 0x6906c2feL, 0xf762575dL, 0x806567cbL,
0x196c3671L, 0x6e6b06e7L, 0xfed41b76L, 0x89d32be0L, 0x10da7a5aL,
0x67dd4accL, 0xf9b9df6fL, 0x8ebeeff9L, 0x17b7be43L, 0x60b08ed5L,
0xd6d6a3e8L, 0xa1d1937eL, 0x38d8c2c4L, 0x4fdff252L, 0xd1bb67f1L,
0xa6bc5767L, 0x3fb506ddL, 0x48b2364bL, 0xd80d2bdaL, 0xaf0a1b4cL,
0x36034af6L, 0x41047a60L, 0xdf60efc3L, 0xa867df55L, 0x316e8eefL,
0x4669be79L, 0xcb61b38cL, 0xbc66831aL, 0x256fd2a0L, 0x5268e236L,
0xcc0c7795L, 0xbb0b4703L, 0x220216b9L, 0x5505262fL, 0xc5ba3bbeL,
0xb2bd0b28L, 0x2bb45a92L, 0x5cb36a04L, 0xc2d7ffa7L, 0xb5d0cf31L,
0x2cd99e8bL, 0x5bdeae1dL, 0x9b64c2b0L, 0xec63f226L, 0x756aa39cL,
0x026d930aL, 0x9c0906a9L, 0xeb0e363fL, 0x72076785L, 0x05005713L,
0x95bf4a82L, 0xe2b87a14L, 0x7bb12baeL, 0x0cb61b38L, 0x92d28e9bL,
0xe5d5be0dL, 0x7cdcefb7L, 0x0bdbdf21L, 0x86d3d2d4L, 0xf1d4e242L,
0x68ddb3f8L, 0x1fda836eL, 0x81be16cdL, 0xf6b9265bL, 0x6fb077e1L,
0x18b74777L, 0x88085ae6L, 0xff0f6a70L, 0x66063bcaL, 0x11010b5cL,
0x8f659effL, 0xf862ae69L, 0x616bffd3L, 0x166ccf45L, 0xa00ae278L,
0xd70dd2eeL, 0x4e048354L, 0x3903b3c2L, 0xa7672661L, 0xd06016f7L,
0x4969474dL, 0x3e6e77dbL, 0xaed16a4aL, 0xd9d65adcL, 0x40df0b66L,
0x37d83bf0L, 0xa9bcae53L, 0xdebb9ec5L, 0x47b2cf7fL, 0x30b5ffe9L,
0xbdbdf21cL, 0xcabac28aL, 0x53b39330L, 0x24b4a3a6L, 0xbad03605L,
0xcdd70693L, 0x54de5729L, 0x23d967bfL, 0xb3667a2eL, 0xc4614ab8L,
0x5d681b02L, 0x2a6f2b94L, 0xb40bbe37L, 0xc30c8ea1L, 0x5a05df1bL,
0x2d02ef8dL
};
#define DO1(buf) crc = crc_table[((int)crc ^ (*buf++)) & 0xff] ^ (crc >> 8);
#define DO2(buf) \
DO1(buf); \
DO1(buf);
#define DO4(buf) \
DO2(buf); \
DO2(buf);
#define DO8(buf) \
DO4(buf); \
DO4(buf);
uint32_t crc32(uint8_t *buffer, uint16_t len)
{
uint32_t crc;
crc = 0;
crc = crc ^ 0xffffffffL;
while (len >= 8) {
DO8(buffer);
len -= 8;
}
if (len)
do {
DO1(buffer);
} while (--len);
return crc;
}

18
src/crc8.c Normal file
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@@ -0,0 +1,18 @@
#include "crc8.h"
unsigned char crc8(const unsigned char * data, const unsigned int size)
{
unsigned char crc = 0;
for ( unsigned int i = 0; i < size; ++i )
{
unsigned char inbyte = data[i];
for ( unsigned char j = 0; j < 8; ++j )
{
unsigned char mix = (crc ^ inbyte) & 0x01;
crc >>= 1;
if ( mix ) crc ^= 0x8C;
inbyte >>= 1;
}
}
return crc;
}

157
src/cvend.c
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@@ -1,7 +1,10 @@
#include <stdint.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <unistd.h>
#include "crc8.h"
#include "crc32.h"
int last_seq = 0;
@@ -40,6 +43,8 @@ enum message_type {
MTYPE_SAM_CTRL = 0xb6,
MTYPE_SAM_CTRL_REPLY = 0xb7,
MTYPE_DESFIRE_READ = 0xb9,
MTYPE_DESFIRE_INTERACT = 0xbc,
MTYPE_DESFIRE_INTERACT_REPLY = 0xbd,
MTYPE_UNHANDLED_CARD = 0xbe,
MTYPE_EMV = 0xd0,
MTYPE_EMV_STATUS = 0xd1,
@@ -50,6 +55,21 @@ enum message_type {
MTYPE_LOG = 0xed
};
enum card_type {
CTYPE_VDV_KA = 0x04,
CTYPE_MIFARE_CLASSIC = 0x05,
CTYPE_ISO = 0x06,
CTYPE_DESFIRE = 0x07,
CTYPE_GIROGO = 0x08,
CTYPE_ITSO = 0x09,
CTYPE_ULTRALIGHT_C = 0x0a
};
enum function_status {
FUNC_DISABLE = 0x00,
FUNC_ENABLE = 0x01
};
const char *stringify_msg_type(uint8_t msg_type)
{
switch (msg_type) {
@@ -135,6 +155,10 @@ const char *stringify_msg_type(uint8_t msg_type)
return "MTYPE_SECURITY_SERVICES";
case MTYPE_SECURITY_SERVICES_REPLY:
return "MTYPE_SECURITY_SERVICES_REPLY";
case MTYPE_DESFIRE_INTERACT:
return "MTYPE_DESFIRE_INTERACT";
case MTYPE_DESFIRE_INTERACT_REPLY:
return "MTYPE_DESFIRE_INTERACT_REPLY";
case MTYPE_LOG:
return "MTYPE_LOG";
default:
@@ -153,12 +177,47 @@ typedef struct cvend_packet {
uint32_t msg_crc;
} cvend_packet;
void calc_hdr_crc(cvend_packet *packet)
{
packet->magic = 0xbc;
packet->msg_len = (packet->msg_len << 8) + (packet->msg_len >> 8);
packet->hdr_crc = crc8((uint8_t *)packet, 6);
packet->msg_len = (packet->msg_len << 8) + (packet->msg_len >> 8);
}
void calc_msg_crc(cvend_packet *packet)
{
if (packet->msg_type & 0x80)
packet->msg_crc = crc32(packet->msg_data, packet->msg_len);
else
packet->msg_crc = 0;
}
void print_packet(cvend_packet *packet) {
printf("seq = %u\n", packet->seq);
printf("flags = %x\n", packet->flags);
printf("msg_type = %s", stringify_msg_type(packet->msg_type));
printf(" (%02X)\n", packet->msg_type);
printf("msg_len = %u\n", packet->msg_len);
printf("hdr_crc = %u\n", packet->hdr_crc);
printf("msg_data = ");
if (packet->msg_type == MTYPE_LOG) {
printf("%s", packet->msg_data);
} else {
for (uint16_t i = 0; i < packet->msg_len; i++)
printf("%02x ", packet->msg_data[i]);
}
printf("\n");
printf("msg_crc = %u\n\n", packet->msg_crc);
}
cvend_packet *cvend_read(FILE *file)
{
uint8_t buf;
fread(&buf, 1, 1, file);
if (buf != 0xbc) {
printf("failed: %x\n", buf);
exit(1);
return NULL;
}
@@ -166,13 +225,12 @@ cvend_packet *cvend_read(FILE *file)
fread(&packet->seq, 1, 1, file);
fread(&packet->flags, 1, 1, file);
fread(&packet->msg_type, 1, 1, file);
fread(&packet->msg_len + 1, 1, 1, file);
fread((uint8_t *)&packet->msg_len + 1, 1, 1, file);
fread(&packet->msg_len, 1, 1, file);
fread(&packet->hdr_crc, 1, 1, file);
packet->msg_data = malloc(packet->msg_len + 1);
packet->msg_data = malloc(packet->msg_len);
fread(packet->msg_data, 1, packet->msg_len, file);
packet->msg_data[packet->msg_len] = '\0';
if (packet->msg_type & 0x80)
fread(&packet->msg_crc, 1, 4, file);
else
@@ -181,8 +239,30 @@ cvend_packet *cvend_read(FILE *file)
return packet;
}
void cvend_send(uint8_t msg_type, uint8_t *msg_data, uint16_t msg_size)
void cvend_write(FILE *file, uint8_t msg_type, uint8_t *msg_data, uint16_t msg_len)
{
cvend_packet packet;
packet.seq = ++last_seq;
packet.flags = 0;
packet.msg_type = msg_type;
packet.msg_data = msg_data;
packet.msg_len = msg_len;
calc_hdr_crc(&packet);
calc_msg_crc(&packet);
fwrite(&packet.magic, 1, 1, file);
fwrite(&packet.seq, 1, 1, file);
fwrite(&packet.flags, 1, 1, file);
fwrite(&packet.msg_type, 1, 1, file);
fwrite((uint8_t *)&packet.msg_len + 1, 1, 1, file);
fwrite(&packet.msg_len, 1, 1, file);
fwrite(&packet.hdr_crc, 1, 1, file);
fwrite(packet.msg_data, 1, packet.msg_len, file);
if (packet.msg_type & 0x80)
fwrite(&packet.msg_crc, 1, 4, file);
fflush(file);
print_packet(&packet);
}
void cvend_free(cvend_packet *packet)
@@ -191,62 +271,45 @@ void cvend_free(cvend_packet *packet)
free(packet);
}
unsigned char dallas_crc8(const unsigned char * data, const unsigned int size)
{
unsigned char crc = 0;
for ( unsigned int i = 0; i < size; ++i )
{
unsigned char inbyte = data[i];
for ( unsigned char j = 0; j < 8; ++j )
{
unsigned char mix = (crc ^ inbyte) & 0x01;
crc >>= 1;
if ( mix ) crc ^= 0x8C;
inbyte >>= 1;
}
}
return crc;
}
void calc_hdr_crc(cvend_packet *packet)
{
packet->magic = 0xbc;
packet->msg_len = (packet->msg_len << 8) + (packet->msg_len >> 8);
packet->hdr_crc = dallas_crc8((uint8_t *) packet, 6);
packet->msg_len = (packet->msg_len << 8) + (packet->msg_len >> 8);
}
int main(int argc, char *argv[])
{
cvend_packet crc_packet;
crc_packet.seq = 131;
crc_packet.flags = 0;
crc_packet.msg_type = MTYPE_UNHANDLED_CARD;
crc_packet.msg_len = 41;
FILE *file = fopen(argc > 1 ? argv[1] : "/dev/ttymxc3", "w+");
uint8_t desfire_enable[] = { 0x00, CTYPE_DESFIRE, 0x01, FUNC_ENABLE };
uint8_t desfire_get_version[] = { 0x60 };
uint8_t desfire_select_application[] = { 0x5a, 0xF2, 0x10, 0xE0 };
uint8_t desfire_fid_list[] = { 0xf5, 0x00 };
uint8_t desfire_read[] = { 0xbd, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00 };
uint8_t desfire_free[] = { 0x6e };
printf("new_crc = %d\n", crc_packet.hdr_crc);
cvend_write(file, MTYPE_PROX_CARD_FUNCTION, desfire_enable, 4);
FILE *file = fopen(argc > 1 ? argv[1] : "/dev/ttymxc3", "r");
while (1) {
cvend_packet *packet;
do {
packet = cvend_read(file);
} while (!packet);
printf("\n");
printf("seq = %u\n", packet->seq);
printf("flags = %x\n", packet->flags);
printf("msg_type = %s\n", stringify_msg_type(packet->msg_type));
printf("msg_len = %u\n", packet->msg_len);
printf("hdr_crc = %u\n", packet->hdr_crc);
printf("msg_data = ");
for (uint16_t i = 0; i < packet->msg_len; i++)
printf("%02x ", packet->msg_data[i]);
printf("\n");
printf("msg_crc = %u\n\n", packet->msg_crc);
if (packet->msg_type != MTYPE_HEARTBEAT)
print_packet(packet);
if (packet->msg_type == MTYPE_DESFIRE_READ) {
//cvend_write(file, MTYPE_DESFIRE_INTERACT, desfire_get_version, 1);
cvend_write(file, MTYPE_DESFIRE_INTERACT, desfire_select_application, 4);
cvend_packet *response;
do {
response = cvend_read(file);
} while (!response);
print_packet(response);
cvend_write(file, MTYPE_DESFIRE_INTERACT, desfire_fid_list, 1);
cvend_free(response);
cvend_write(file, MTYPE_DESFIRE_INTERACT, desfire_read, 8);
cvend_write(file, MTYPE_DESFIRE_INTERACT, desfire_free, 1);
}
cvend_free(packet);
}
fclose(file);
return 0;
}