diff --git a/inc/crc32.h b/inc/crc32.h new file mode 100644 index 0000000..5964255 --- /dev/null +++ b/inc/crc32.h @@ -0,0 +1,8 @@ +#ifndef CRC32_H_I5S4G2OH +#define CRC32_H_I5S4G2OH + +#include + +uint32_t crc32(uint8_t *buffer, uint16_t len); + +#endif /* end of include guard: CRC32_H_I5S4G2OH */ diff --git a/inc/crc8.h b/inc/crc8.h new file mode 100644 index 0000000..f84e7f0 --- /dev/null +++ b/inc/crc8.h @@ -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 */ diff --git a/src/crc32.c b/src/crc32.c new file mode 100644 index 0000000..35f3692 --- /dev/null +++ b/src/crc32.c @@ -0,0 +1,85 @@ +// https://gist.github.com/xobs/91a84d29152161e973d717b9be84c4d0 + +#include + +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; +} diff --git a/src/crc8.c b/src/crc8.c new file mode 100644 index 0000000..e14172c --- /dev/null +++ b/src/crc8.c @@ -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; +} diff --git a/src/cvend.c b/src/cvend.c index c8b9365..ab0c996 100644 --- a/src/cvend.c +++ b/src/cvend.c @@ -1,7 +1,10 @@ #include #include #include +#include #include +#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; } + +