[proxmark3-svn] / client / cmdhftopaz.c

//-----------------------------------------------------------------------------
// Copyright (C) 2015 Piwi
//
// This code is licensed to you under the terms of the GNU GPL, version 2 or,
// at your option, any later version. See the LICENSE.txt file for the text of
// the license.
//-----------------------------------------------------------------------------
// High frequency Topaz (NFC Type 1) commands
//-----------------------------------------------------------------------------

#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <unistd.h>
#include "cmdmain.h"
#include "cmdparser.h"
#include "cmdhftopaz.h"
#include "cmdhf14a.h"
#include "ui.h"
#include "mifare.h"
#include "proxmark3.h"
#include "iso14443crc.h"
#include "protocols.h"

#define TOPAZ_STATIC_MEMORY	(0x0f * 8)		// 15 blocks with 8 Bytes each

// a struct to describe a memory area which contains lock bits and the corresponding lockable memory area
typedef struct dynamic_lock_area {
	struct dynamic_lock_area *next;
	uint16_t	byte_offset;			// the address of the lock bits
	uint16_t	size_in_bits;
	uint16_t	first_locked_byte;		// the address of the lockable area
	uint16_t	bytes_locked_per_bit;
} dynamic_lock_area_t;


static struct {
	uint8_t HR01[2];
	uint8_t uid[7];
	uint16_t size;
	uint8_t data_blocks[TOPAZ_STATIC_MEMORY/8][8];	// this memory is always there
	uint8_t *dynamic_memory;						// this memory can be there
	dynamic_lock_area_t *dynamic_lock_areas;		// lock area descriptors
} topaz_tag;


static void topaz_switch_on_field(void)
{
	UsbCommand c = {CMD_READER_ISO_14443a, {ISO14A_CONNECT | ISO14A_NO_SELECT | ISO14A_NO_DISCONNECT | ISO14A_TOPAZMODE, 0, 0}};
	SendCommand(&c);
}


static void topaz_switch_off_field(void)
{
	UsbCommand c = {CMD_READER_ISO_14443a, {0, 0, 0}};
	SendCommand(&c);
}


// send a raw topaz command, returns the length of the response (0 in case of error)
static int topaz_send_cmd_raw(uint8_t *cmd, uint8_t len, uint8_t *response)
{
	UsbCommand c = {CMD_READER_ISO_14443a, {ISO14A_RAW | ISO14A_NO_DISCONNECT | ISO14A_TOPAZMODE, len, 0}};
	memcpy(c.d.asBytes, cmd, len);
	SendCommand(&c);

	UsbCommand resp;
	WaitForResponse(CMD_ACK, &resp);

	if (resp.arg[0] > 0) {
		memcpy(response, resp.d.asBytes, resp.arg[0]);
	}
	
	return resp.arg[0];
}


// calculate CRC bytes and send topaz command, returns the length of the response (0 in case of error) 
static int topaz_send_cmd(uint8_t *cmd, uint8_t len, uint8_t *response)
{
	if (len > 1) {
        uint8_t first, second;
		ComputeCrc14443(CRC_14443_B, cmd, len-2, &first, &second);
        cmd[len-2] = first;
        cmd[len-1] = second;
	}

	return topaz_send_cmd_raw(cmd, len, response);
}


// select a topaz tag. Send WUPA and RID.
static int topaz_select(uint8_t *atqa, uint8_t *rid_response)
{
	// ToDo: implement anticollision

	uint8_t wupa_cmd[] = {TOPAZ_WUPA};
	uint8_t rid_cmd[] = {TOPAZ_RID, 0, 0, 0, 0, 0, 0, 0, 0};

	topaz_switch_on_field();

	if (!topaz_send_cmd(wupa_cmd, sizeof(wupa_cmd), atqa)) {
		topaz_switch_off_field();
		return -1;		// WUPA failed
	}

	if (!topaz_send_cmd(rid_cmd, sizeof(rid_cmd), rid_response)) {
		topaz_switch_off_field();
		return -2;		// RID failed
	}
	
	return 0;		// OK
}


// read all of the static memory of a selected Topaz tag.
static int topaz_rall(uint8_t *uid, uint8_t *response)
{
	uint8_t rall_cmd[] = {TOPAZ_RALL, 0, 0, 0, 0, 0, 0, 0, 0};

	memcpy(&rall_cmd[3], uid, 4);
	if (!topaz_send_cmd(rall_cmd, sizeof(rall_cmd), response)) {
		topaz_switch_off_field();
		return -1;		// RALL failed
	}
	
	return 0;
}


// read a block (8 Bytes) of a selected Topaz tag.
static int topaz_read_block(uint8_t *uid, uint8_t blockno, uint8_t *block_data)
{
	uint8_t read8_cmd[] = {TOPAZ_READ8, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0};
	uint8_t read8_response[11];
	
	read8_cmd[1] = blockno;
	memcpy(&read8_cmd[10], uid, 4);
	if (!topaz_send_cmd(read8_cmd, sizeof(read8_cmd), read8_response)) {
		topaz_switch_off_field();
		return -1;		// READ8 failed
	}
	
	memcpy(block_data, &read8_response[1], 8);
	
	return 0;
}


// read a segment (16 blocks = 128 Bytes) of a selected Topaz tag. Works only for tags with dynamic memory.
static int topaz_read_segment(uint8_t *uid, uint8_t segno, uint8_t *segment_data)
{
	uint8_t rseg_cmd[] = {TOPAZ_RSEG, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0};
	uint8_t rseg_response[131];
	
	rseg_cmd[1] = segno << 4;
	memcpy(&rseg_cmd[10], uid, 4);
	if (!topaz_send_cmd(rseg_cmd, sizeof(rseg_cmd), rseg_response)) {
		topaz_switch_off_field();
		return -1;		// RSEG failed
	}
	
	memcpy(segment_data, &rseg_response[1], 128);
	
	return 0;
}


// search for the lock area descriptor for the lockable area including byteno 
static dynamic_lock_area_t *get_dynamic_lock_area(uint16_t byteno)
{
	dynamic_lock_area_t *lock_area;
	
	lock_area = topaz_tag.dynamic_lock_areas;
	
	while (lock_area != NULL) {
		if (byteno < lock_area->first_locked_byte) {
			lock_area = lock_area->next;
		} else {
			return lock_area;
		}
	}

	return NULL;
}


// check if a memory byte is locked.
static bool topaz_byte_is_locked(uint16_t byteno)
{
	uint8_t *lockbits;
	uint16_t locked_bytes_per_bit;
	dynamic_lock_area_t *lock_area;
	
	if (byteno < TOPAZ_STATIC_MEMORY) {
		lockbits = &topaz_tag.data_blocks[0x0e][0];
		locked_bytes_per_bit = 8;
	} else {
		lock_area = get_dynamic_lock_area(byteno);
		if (lock_area == NULL) {
			return false;
		} else {
			lockbits = &topaz_tag.dynamic_memory[lock_area->byte_offset - TOPAZ_STATIC_MEMORY];
			locked_bytes_per_bit = lock_area->bytes_locked_per_bit;
			byteno = byteno - lock_area->first_locked_byte;
		}
	}

	uint16_t blockno = byteno / locked_bytes_per_bit;
	if(lockbits[blockno/8] & (0x01 << (blockno % 8))) {
		return true;
	} else {
		return false;
	}
}


// read and print the Capability Container
static int topaz_print_CC(uint8_t *data)
{
	if(data[0] != 0xe1) {
		topaz_tag.size = TOPAZ_STATIC_MEMORY;
		return -1;		// no NDEF message
	}

	PrintAndLog("Capability Container: %02x %02x %02x %02x", data[0], data[1], data[2], data[3]);
	PrintAndLog("  %02x: NDEF Magic Number", data[0]); 
	PrintAndLog("  %02x: version %d.%d supported by tag", data[1], (data[1] & 0xF0) >> 4, data[1] & 0x0f);
	uint16_t memsize = (data[2] + 1) * 8;
	topaz_tag.size = memsize;
	topaz_tag.dynamic_memory = malloc(memsize - TOPAZ_STATIC_MEMORY);
	PrintAndLog("  %02x: Physical Memory Size of this tag: %d bytes", data[2], memsize);
	PrintAndLog("  %02x: %s / %s", data[3], 
				(data[3] & 0xF0) ? "(RFU)" : "Read access granted without any security", 
				(data[3] & 0x0F)==0 ? "Write access granted without any security" : (data[3] & 0x0F)==0x0F ? "No write access granted at all" : "(RFU)");
	return 0;				
}


// return type, length and value of a TLV, starting at memory position *TLV_ptr 
static void get_TLV(uint8_t **TLV_ptr, uint8_t *TLV_type, uint16_t *TLV_length, uint8_t **TLV_value)
{
	*TLV_length = 0;
	*TLV_value = NULL;

	*TLV_type = **TLV_ptr;
	*TLV_ptr += 1;
	switch (*TLV_type) {
		case 0x00:			// NULL TLV.
		case 0xFE:			// Terminator TLV.
			break;
		case 0x01:			// Lock Control TLV
		case 0x02:			// Reserved Memory TLV
		case 0x03:			// NDEF message TLV
		case 0xFD:			// proprietary TLV
			*TLV_length = **TLV_ptr;
			*TLV_ptr += 1;
			if (*TLV_length == 0xff) {
				*TLV_length = **TLV_ptr << 8;
				*TLV_ptr += 1;
				*TLV_length |= **TLV_ptr;
				*TLV_ptr += 1;
			}
			*TLV_value = *TLV_ptr;
			*TLV_ptr += *TLV_length;
			break;
		default:			// RFU
			break;
	}
}


// lock area TLVs contain no information on the start of the respective lockable area. Lockable areas
// do not include the lock bits and reserved memory. We therefore need to adjust the start of the 
// respective lockable areas accordingly
static void adjust_lock_areas(uint16_t block_start, uint16_t block_size)
{
	dynamic_lock_area_t *lock_area = topaz_tag.dynamic_lock_areas;
	while (lock_area != NULL) {
		if (lock_area->first_locked_byte <= block_start) {
			lock_area->first_locked_byte += block_size;
		}
		lock_area = lock_area->next;
	}
}


// read and print the lock area and reserved memory TLVs
static void topaz_print_control_TLVs(uint8_t *memory)
{
	uint8_t *TLV_ptr = memory;
	uint8_t TLV_type = 0;
	uint16_t TLV_length;
	uint8_t *TLV_value;
	bool lock_TLV_present = false;
	bool reserved_memory_control_TLV_present = false;
	uint16_t next_lockable_byte = 0x0f * 8;				// first byte after static memory area
	
	while(*TLV_ptr != 0x03 && *TLV_ptr != 0xFD && *TLV_ptr != 0xFE) {	
		// all Lock Control TLVs shall be present before the NDEF message TLV, the proprietary TLV (and the Terminator TLV)
		get_TLV(&TLV_ptr, &TLV_type, &TLV_length, &TLV_value);
		if (TLV_type == 0x01) {			// a Lock Control TLV
			uint8_t pages_addr = TLV_value[0] >> 4;
			uint8_t byte_offset = TLV_value[0] & 0x0f;
			uint16_t size_in_bits = TLV_value[1] ? TLV_value[1] : 256;
			uint16_t size_in_bytes = (size_in_bits + 7)/8;
			uint16_t bytes_per_page = 1 << (TLV_value[2] & 0x0f);
			uint16_t bytes_locked_per_bit = 1 << (TLV_value[2] >> 4);
			uint16_t area_start = pages_addr * bytes_per_page + byte_offset;
			PrintAndLog("Lock Area of %d bits at byte offset 0x%04x. Each Lock Bit locks %d bytes.", 
						size_in_bits,
						area_start,
						bytes_locked_per_bit);
			lock_TLV_present = true;
			dynamic_lock_area_t *old = topaz_tag.dynamic_lock_areas;
			dynamic_lock_area_t *new = topaz_tag.dynamic_lock_areas;
			if (old == NULL) {
				new = topaz_tag.dynamic_lock_areas = (dynamic_lock_area_t *)malloc(sizeof(dynamic_lock_area_t));
			} else {
				while(old->next != NULL) {
					old = old->next;
				}
				new = old->next = (dynamic_lock_area_t *)malloc(sizeof(dynamic_lock_area_t));
			}
			new->next = NULL;
			if (area_start <= next_lockable_byte) {
				// lock areas are not lockable
				next_lockable_byte += size_in_bytes;
			}
			new->first_locked_byte = next_lockable_byte;
			new->byte_offset = area_start;
			new->size_in_bits = size_in_bits;
			new->bytes_locked_per_bit = bytes_locked_per_bit;
			next_lockable_byte += size_in_bits * bytes_locked_per_bit;		
		}
		if (TLV_type == 0x02) {			// a Reserved Memory Control TLV
			uint8_t pages_addr = TLV_value[0] >> 4;
			uint8_t byte_offset = TLV_value[0] & 0x0f;
			uint8_t size_in_bytes = TLV_value[1] ? TLV_value[1] : 256;
			uint8_t bytes_per_page = 1 << (TLV_value[2] & 0x0f);
			uint16_t area_start = pages_addr * bytes_per_page + byte_offset;
			PrintAndLog("Reserved Memory of %d bytes at byte offset 0x%02x.", 
						size_in_bytes,
						area_start);
			reserved_memory_control_TLV_present = true;
			adjust_lock_areas(area_start, size_in_bytes);  // reserved memory areas are not lockable
			if (area_start <= next_lockable_byte) {
				next_lockable_byte += size_in_bytes;
			}
		}
	}
	
	if (!lock_TLV_present) {
		PrintAndLog("(No Lock Control TLV present)");
	}
	
	if (!reserved_memory_control_TLV_present) {
		PrintAndLog("(No Reserved Memory Control TLV present)");
	}	
}


// read all of the dynamic memory
static int topaz_read_dynamic_data(void)
{
	// first read the remaining block of segment 0
	if(topaz_read_block(topaz_tag.uid, 0x0f, &topaz_tag.dynamic_memory[0]) == -1) {
		PrintAndLog("Error while reading dynamic memory block %02x. Aborting...", 0x0f);
		return -1;
	}
	
	// read the remaining segments
	uint8_t max_segment = topaz_tag.size / 128 - 1;
	for(uint8_t segment = 1; segment <= max_segment; segment++) {
		if(topaz_read_segment(topaz_tag.uid, segment, &topaz_tag.dynamic_memory[(segment-1)*128+8]) == -1) {
			PrintAndLog("Error while reading dynamic memory block %02x. Aborting...", 0x0f);
			return -1;
		}
	}
	
	return 0;
}
	

// read and print the dynamic memory
static void topaz_print_dynamic_data(void)
{
	if (topaz_tag.size > TOPAZ_STATIC_MEMORY) {
		PrintAndLog("Dynamic Data blocks:");
		if (topaz_read_dynamic_data() == 0) {
			PrintAndLog("block# | offset | Data                    | Locked(y/n)");
			char line[80];
			for (uint16_t blockno = 0x0f; blockno < topaz_tag.size/8; blockno++) {
				uint8_t *block_data = &topaz_tag.dynamic_memory[(blockno-0x0f)*8];
				char lockbits[9];
				for (uint16_t j = 0; j < 8; j++) {
					sprintf(&line[3*j], "%02x ", block_data[j]);
					lockbits[j] = topaz_byte_is_locked(blockno*8+j) ? 'y' : 'n';
				}
				lockbits[8] = '\0';
				PrintAndLog("  0x%02x | 0x%04x | %s|   %-3s", blockno, blockno*8, line, lockbits);
			}
		}
	}
}


static void topaz_print_lifecycle_state(uint8_t *data)
{
	// to be done
}


static void topaz_print_NDEF(uint8_t *data)
{
	// to be done. 
}


// read a Topaz tag and print some usefull information	
int CmdHFTopazReader(const char *Cmd)
{
	int status;
	uint8_t atqa[2];
	uint8_t rid_response[8];
	uint8_t *uid_echo = &rid_response[2];
	uint8_t rall_response[124];
	
	status = topaz_select(atqa, rid_response);
	
	if (status == -1) {
		PrintAndLog("Error: couldn't receive ATQA");
		return -1;
	}

	PrintAndLog("ATQA : %02x %02x", atqa[1], atqa[0]);
	if (atqa[1] != 0x0c && atqa[0] != 0x00) {
		PrintAndLog("Tag doesn't support the Topaz protocol.");
		topaz_switch_off_field();
		return -1;
	}
	
	if (status == -2) {
		PrintAndLog("Error: tag didn't answer to RID");
		topaz_switch_off_field();
		return -1;
	}

	topaz_tag.HR01[0] = rid_response[0];
	topaz_tag.HR01[1] = rid_response[1];
	
	// ToDo: CRC check
	PrintAndLog("HR0  : %02x (%sa Topaz tag (%scapable of carrying a NDEF message), %s memory map)", rid_response[0], 
						(rid_response[0] & 0xF0) == 0x10 ? "" : "not ",
						(rid_response[0] & 0xF0) == 0x10 ? "" : "not ",
						(rid_response[0] & 0x0F) == 0x10 ? "static" : "dynamic");
	PrintAndLog("HR1  : %02x", rid_response[1]);
	
	status = topaz_rall(uid_echo, rall_response);

	if(status == -1) {
		PrintAndLog("Error: tag didn't answer to RALL");
		topaz_switch_off_field();
		return -1;
	}

	memcpy(topaz_tag.uid, rall_response+2, 7);
	PrintAndLog("UID  : %02x %02x %02x %02x %02x %02x %02x", 
			topaz_tag.uid[6], 
			topaz_tag.uid[5], 
			topaz_tag.uid[4], 
			topaz_tag.uid[3], 
			topaz_tag.uid[2], 
			topaz_tag.uid[1], 
			topaz_tag.uid[0]);
	PrintAndLog("       UID[6] (Manufacturer Byte) = %02x, Manufacturer: %s", 
			topaz_tag.uid[6], 
			getTagInfo(topaz_tag.uid[6]));

	memcpy(topaz_tag.data_blocks, rall_response+2, 0x0f*8);
	PrintAndLog("");
	PrintAndLog("Static Data blocks 00 to 0c:");
	PrintAndLog("block# | offset | Data                    | Locked(y/n)");
	char line[80];
	for (uint16_t i = 0; i <= 0x0c; i++) {
		char lockbits[9];
		for (uint16_t j = 0; j < 8; j++) {
			sprintf(&line[3*j], "%02x ", topaz_tag.data_blocks[i][j] /*rall_response[2 + 8*i + j]*/);
			lockbits[j] = topaz_byte_is_locked(i*8+j) ? 'y' : 'n';
		}
		lockbits[8] = '\0';
		PrintAndLog("  0x%02x | 0x%04x | %s|   %-3s", i, i*8, line, lockbits);
	}
	
	PrintAndLog("");
	PrintAndLog("Static Reserved block 0d:");
	for (uint16_t j = 0; j < 8; j++) {
		sprintf(&line[3*j], "%02x ", topaz_tag.data_blocks[0x0d][j]);
	}
	PrintAndLog("  0x%02x | 0x%04x | %s|   %-3s", 0x0d, 0x0d*8, line, "n/a");
	
	PrintAndLog("");
	PrintAndLog("Static Lockbits and OTP Bytes:");
	for (uint16_t j = 0; j < 8; j++) {
		sprintf(&line[3*j], "%02x ", topaz_tag.data_blocks[0x0e][j]);
	}
	PrintAndLog("  0x%02x | 0x%04x | %s|   %-3s", 0x0e, 0x0e*8, line, "n/a");

	PrintAndLog("");

	status = topaz_print_CC(&topaz_tag.data_blocks[1][0]);
	
	if (status == -1) {
		PrintAndLog("No NDEF message data present");
		topaz_switch_off_field();
		return 0;
	}

	PrintAndLog("");
	topaz_print_control_TLVs(&topaz_tag.data_blocks[1][4]);

	PrintAndLog("");
	topaz_print_dynamic_data();
	
	topaz_print_lifecycle_state(&topaz_tag.data_blocks[1][0]);

	topaz_print_NDEF(&topaz_tag.data_blocks[1][0]);
	
	topaz_switch_off_field();
	return 0;
}


int CmdHFTopazCmdRaw(const char *Cmd)
{
	PrintAndLog("not yet implemented. Use hf 14 raw with option -T.");
	return 0;
}


static int CmdHelp(const char *Cmd);


static command_t CommandTable[] = 
{
	{"help",	CmdHelp,			1, "This help"},
	{"reader",	CmdHFTopazReader,	0, "Act like a Topaz reader"},
	{"snoop",	CmdHF14ASnoop,		0, "Eavesdrop a Topaz reader-tag communication"},
	{"raw",		CmdHFTopazCmdRaw,	0, "Send raw hex data to tag"},
	{NULL,		NULL,				0, NULL}
};


int CmdHFTopaz(const char *Cmd) {
	// flush
	WaitForResponseTimeout(CMD_ACK,NULL,100);

	// parse
	CmdsParse(CommandTable, Cmd);
	return 0;
}


static int CmdHelp(const char *Cmd)
{
	CmdsHelp(CommandTable);
	return 0;
}
Commit	Line	Data
05ddb52c	1	//-----------------------------------------------------------------------------
	2	// Copyright (C) 2015 Piwi
	3	//
	4	// This code is licensed to you under the terms of the GNU GPL, version 2 or,
	5	// at your option, any later version. See the LICENSE.txt file for the text of
	6	// the license.
	7	//-----------------------------------------------------------------------------
	8	// High frequency Topaz (NFC Type 1) commands
	9	//-----------------------------------------------------------------------------
	10
	11	#include <stdio.h>
	12	#include <stdlib.h>
	13	#include <string.h>
	14	#include <unistd.h>
	15	#include "cmdmain.h"
	16	#include "cmdparser.h"
	17	#include "cmdhftopaz.h"
	18	#include "cmdhf14a.h"
	19	#include "ui.h"
48ece4a7	20	#include "mifare.h"
	21	#include "proxmark3.h"
	22	#include "iso14443crc.h"
	23	#include "protocols.h"
	24
7624e8b2	25	#define TOPAZ_STATIC_MEMORY (0x0f * 8) // 15 blocks with 8 Bytes each
6e6f1099	26
7624e8b2	27	// a struct to describe a memory area which contains lock bits and the corresponding lockable memory area
6e6f1099	28	typedef struct dynamic_lock_area {
6e6f1099	29	struct dynamic_lock_area *next;
7624e8b2	30	uint16_t byte_offset; // the address of the lock bits
6e6f1099	31	uint16_t size_in_bits;
7624e8b2	32	uint16_t first_locked_byte; // the address of the lockable area
6e6f1099	33	uint16_t bytes_locked_per_bit;
	34	} dynamic_lock_area_t;
	35
48ece4a7	36
c5847ae8	37	static struct {
	38	uint8_t HR01[2];
	39	uint8_t uid[7];
7624e8b2	40	uint16_t size;
	41	uint8_t data_blocks[TOPAZ_STATIC_MEMORY/8][8]; // this memory is always there
	42	uint8_t *dynamic_memory; // this memory can be there
	43	dynamic_lock_area_t *dynamic_lock_areas; // lock area descriptors
c5847ae8	44	} topaz_tag;
48ece4a7	45
de15fc5f	46
48ece4a7	47	static void topaz_switch_on_field(void)
	48	{
	49	UsbCommand c = {CMD_READER_ISO_14443a, {ISO14A_CONNECT \| ISO14A_NO_SELECT \| ISO14A_NO_DISCONNECT \| ISO14A_TOPAZMODE, 0, 0}};
	50	SendCommand(&c);
48ece4a7	51	}
	52
	53
	54	static void topaz_switch_off_field(void)
	55	{
	56	UsbCommand c = {CMD_READER_ISO_14443a, {0, 0, 0}};
	57	SendCommand(&c);
48ece4a7	58	}
	59
	60
7624e8b2	61	// send a raw topaz command, returns the length of the response (0 in case of error)
de15fc5f	62	static int topaz_send_cmd_raw(uint8_t cmd, uint8_t len, uint8_t response)
48ece4a7	63	{
	64	UsbCommand c = {CMD_READER_ISO_14443a, {ISO14A_RAW \| ISO14A_NO_DISCONNECT \| ISO14A_TOPAZMODE, len, 0}};
	65	memcpy(c.d.asBytes, cmd, len);
	66	SendCommand(&c);
	67
	68	UsbCommand resp;
	69	WaitForResponse(CMD_ACK, &resp);
	70
de15fc5f	71	if (resp.arg[0] > 0) {
	72	memcpy(response, resp.d.asBytes, resp.arg[0]);
	73	}
	74
	75	return resp.arg[0];
48ece4a7	76	}
	77
	78
7624e8b2	79	// calculate CRC bytes and send topaz command, returns the length of the response (0 in case of error)
de15fc5f	80	static int topaz_send_cmd(uint8_t cmd, uint8_t len, uint8_t response)
48ece4a7	81	{
	82	if (len > 1) {
	83	uint8_t first, second;
de15fc5f	84	ComputeCrc14443(CRC_14443_B, cmd, len-2, &first, &second);
	85	cmd[len-2] = first;
	86	cmd[len-1] = second;
48ece4a7	87	}
48ece4a7	88
de15fc5f	89	return topaz_send_cmd_raw(cmd, len, response);
48ece4a7	90	}
	91
	92
7624e8b2	93	// select a topaz tag. Send WUPA and RID.
de15fc5f	94	static int topaz_select(uint8_t atqa, uint8_t rid_response)
48ece4a7	95	{
48ece4a7	96	// ToDo: implement anticollision
de15fc5f	97
48ece4a7	98	uint8_t wupa_cmd[] = {TOPAZ_WUPA};
de15fc5f	99	uint8_t rid_cmd[] = {TOPAZ_RID, 0, 0, 0, 0, 0, 0, 0, 0};
de15fc5f	100
48ece4a7	101	topaz_switch_on_field();
de15fc5f	102
	103	if (!topaz_send_cmd(wupa_cmd, sizeof(wupa_cmd), atqa)) {
	104	topaz_switch_off_field();
	105	return -1; // WUPA failed
	106	}
	107
	108	if (!topaz_send_cmd(rid_cmd, sizeof(rid_cmd), rid_response)) {
	109	topaz_switch_off_field();
	110	return -2; // RID failed
	111	}
	112
	113	return 0; // OK
	114	}
	115
	116
7624e8b2	117	// read all of the static memory of a selected Topaz tag.
c5847ae8	118	static int topaz_rall(uint8_t uid, uint8_t response)
de15fc5f	119	{
	120	uint8_t rall_cmd[] = {TOPAZ_RALL, 0, 0, 0, 0, 0, 0, 0, 0};
	121
	122	memcpy(&rall_cmd[3], uid, 4);
c5847ae8	123	if (!topaz_send_cmd(rall_cmd, sizeof(rall_cmd), response)) {
de15fc5f	124	topaz_switch_off_field();
	125	return -1; // RALL failed
	126	}
	127
	128	return 0;
48ece4a7	129	}
48ece4a7	130
05ddb52c	131
7624e8b2	132	// read a block (8 Bytes) of a selected Topaz tag.
	133	static int topaz_read_block(uint8_t uid, uint8_t blockno, uint8_t block_data)
	134	{
	135	uint8_t read8_cmd[] = {TOPAZ_READ8, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0};
	136	uint8_t read8_response[11];
	137
	138	read8_cmd[1] = blockno;
	139	memcpy(&read8_cmd[10], uid, 4);
	140	if (!topaz_send_cmd(read8_cmd, sizeof(read8_cmd), read8_response)) {
	141	topaz_switch_off_field();
	142	return -1; // READ8 failed
	143	}
	144
	145	memcpy(block_data, &read8_response[1], 8);
	146
	147	return 0;
	148	}
	149
	150
	151	// read a segment (16 blocks = 128 Bytes) of a selected Topaz tag. Works only for tags with dynamic memory.
	152	static int topaz_read_segment(uint8_t uid, uint8_t segno, uint8_t segment_data)
	153	{
	154	uint8_t rseg_cmd[] = {TOPAZ_RSEG, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0};
	155	uint8_t rseg_response[131];
	156
	157	rseg_cmd[1] = segno << 4;
	158	memcpy(&rseg_cmd[10], uid, 4);
	159	if (!topaz_send_cmd(rseg_cmd, sizeof(rseg_cmd), rseg_response)) {
	160	topaz_switch_off_field();
	161	return -1; // RSEG failed
	162	}
	163
	164	memcpy(segment_data, &rseg_response[1], 128);
	165
	166	return 0;
	167	}
	168
	169
	170	// search for the lock area descriptor for the lockable area including byteno
6e6f1099	171	static dynamic_lock_area_t *get_dynamic_lock_area(uint16_t byteno)
	172	{
	173	dynamic_lock_area_t *lock_area;
	174
	175	lock_area = topaz_tag.dynamic_lock_areas;
	176
	177	while (lock_area != NULL) {
	178	if (byteno < lock_area->first_locked_byte) {
	179	lock_area = lock_area->next;
	180	} else {
	181	return lock_area;
	182	}
	183	}
	184
	185	return NULL;
	186	}
	187
	188
7624e8b2	189	// check if a memory byte is locked.
6e6f1099	190	static bool topaz_byte_is_locked(uint16_t byteno)
de15fc5f	191	{
6e6f1099	192	uint8_t *lockbits;
	193	uint16_t locked_bytes_per_bit;
	194	dynamic_lock_area_t *lock_area;
	195
	196	if (byteno < TOPAZ_STATIC_MEMORY) {
	197	lockbits = &topaz_tag.data_blocks[0x0e][0];
	198	locked_bytes_per_bit = 8;
	199	} else {
	200	lock_area = get_dynamic_lock_area(byteno);
	201	if (lock_area == NULL) {
	202	return false;
7624e8b2	203	} else {
	204	lockbits = &topaz_tag.dynamic_memory[lock_area->byte_offset - TOPAZ_STATIC_MEMORY];
	205	locked_bytes_per_bit = lock_area->bytes_locked_per_bit;
	206	byteno = byteno - lock_area->first_locked_byte;
6e6f1099	207	}
6e6f1099	208	}
	209
	210	uint16_t blockno = byteno / locked_bytes_per_bit;
7624e8b2	211	if(lockbits[blockno/8] & (0x01 << (blockno % 8))) {
de15fc5f	212	return true;
	213	} else {
	214	return false;
	215	}
	216	}
	217
	218
7624e8b2	219	// read and print the Capability Container
de15fc5f	220	static int topaz_print_CC(uint8_t *data)
	221	{
	222	if(data[0] != 0xe1) {
7624e8b2	223	topaz_tag.size = TOPAZ_STATIC_MEMORY;
de15fc5f	224	return -1; // no NDEF message
	225	}
	226
	227	PrintAndLog("Capability Container: %02x %02x %02x %02x", data[0], data[1], data[2], data[3]);
	228	PrintAndLog(" %02x: NDEF Magic Number", data[0]);
	229	PrintAndLog(" %02x: version %d.%d supported by tag", data[1], (data[1] & 0xF0) >> 4, data[1] & 0x0f);
6e6f1099	230	uint16_t memsize = (data[2] + 1) * 8;
7624e8b2	231	topaz_tag.size = memsize;
6e6f1099	232	topaz_tag.dynamic_memory = malloc(memsize - TOPAZ_STATIC_MEMORY);
6e6f1099	233	PrintAndLog(" %02x: Physical Memory Size of this tag: %d bytes", data[2], memsize);
de15fc5f	234	PrintAndLog(" %02x: %s / %s", data[3],
	235	(data[3] & 0xF0) ? "(RFU)" : "Read access granted without any security",
	236	(data[3] & 0x0F)==0 ? "Write access granted without any security" : (data[3] & 0x0F)==0x0F ? "No write access granted at all" : "(RFU)");
	237	return 0;
	238	}
	239
	240
7624e8b2	241	// return type, length and value of a TLV, starting at memory position *TLV_ptr
7624e8b2	242	static void get_TLV(uint8_t *TLV_ptr, uint8_t TLV_type, uint16_t TLV_length, uint8_t *TLV_value)
de15fc5f	243	{
7624e8b2	244	*TLV_length = 0;
7624e8b2	245	*TLV_value = NULL;
de15fc5f	246
7624e8b2	247	TLV_type = *TLV_ptr;
de15fc5f	248	*TLV_ptr += 1;
7624e8b2	249	switch (*TLV_type) {
de15fc5f	250	case 0x00: // NULL TLV.
	251	case 0xFE: // Terminator TLV.
	252	break;
	253	case 0x01: // Lock Control TLV
	254	case 0x02: // Reserved Memory TLV
	255	case 0x03: // NDEF message TLV
	256	case 0xFD: // proprietary TLV
7624e8b2	257	TLV_length = *TLV_ptr;
de15fc5f	258	*TLV_ptr += 1;
7624e8b2	259	if (*TLV_length == 0xff) {
7624e8b2	260	TLV_length = *TLV_ptr << 8;
de15fc5f	261	*TLV_ptr += 1;
7624e8b2	262	TLV_length \|= *TLV_ptr;
de15fc5f	263	*TLV_ptr += 1;
de15fc5f	264	}
7624e8b2	265	TLV_value = TLV_ptr;
7624e8b2	266	TLV_ptr += TLV_length;
de15fc5f	267	break;
	268	default: // RFU
	269	break;
	270	}
	271	}
	272
	273
7624e8b2	274	// lock area TLVs contain no information on the start of the respective lockable area. Lockable areas
	275	// do not include the lock bits and reserved memory. We therefore need to adjust the start of the
	276	// respective lockable areas accordingly
	277	static void adjust_lock_areas(uint16_t block_start, uint16_t block_size)
	278	{
	279	dynamic_lock_area_t *lock_area = topaz_tag.dynamic_lock_areas;
	280	while (lock_area != NULL) {
	281	if (lock_area->first_locked_byte <= block_start) {
	282	lock_area->first_locked_byte += block_size;
	283	}
	284	lock_area = lock_area->next;
	285	}
	286	}
	287
	288
	289	// read and print the lock area and reserved memory TLVs
	290	static void topaz_print_control_TLVs(uint8_t *memory)
de15fc5f	291	{
de15fc5f	292	uint8_t *TLV_ptr = memory;
7624e8b2	293	uint8_t TLV_type = 0;
	294	uint16_t TLV_length;
	295	uint8_t *TLV_value;
de15fc5f	296	bool lock_TLV_present = false;
7624e8b2	297	bool reserved_memory_control_TLV_present = false;
7624e8b2	298	uint16_t next_lockable_byte = 0x0f * 8; // first byte after static memory area
de15fc5f	299
	300	while(TLV_ptr != 0x03 && TLV_ptr != 0xFD && *TLV_ptr != 0xFE) {
	301	// all Lock Control TLVs shall be present before the NDEF message TLV, the proprietary TLV (and the Terminator TLV)
7624e8b2	302	get_TLV(&TLV_ptr, &TLV_type, &TLV_length, &TLV_value);
	303	if (TLV_type == 0x01) { // a Lock Control TLV
	304	uint8_t pages_addr = TLV_value[0] >> 4;
	305	uint8_t byte_offset = TLV_value[0] & 0x0f;
	306	uint16_t size_in_bits = TLV_value[1] ? TLV_value[1] : 256;
	307	uint16_t size_in_bytes = (size_in_bits + 7)/8;
	308	uint16_t bytes_per_page = 1 << (TLV_value[2] & 0x0f);
	309	uint16_t bytes_locked_per_bit = 1 << (TLV_value[2] >> 4);
	310	uint16_t area_start = pages_addr * bytes_per_page + byte_offset;
6e6f1099	311	PrintAndLog("Lock Area of %d bits at byte offset 0x%04x. Each Lock Bit locks %d bytes.",
de15fc5f	312	size_in_bits,
7624e8b2	313	area_start,
de15fc5f	314	bytes_locked_per_bit);
de15fc5f	315	lock_TLV_present = true;
6e6f1099	316	dynamic_lock_area_t *old = topaz_tag.dynamic_lock_areas;
	317	dynamic_lock_area_t *new = topaz_tag.dynamic_lock_areas;
	318	if (old == NULL) {
	319	new = topaz_tag.dynamic_lock_areas = (dynamic_lock_area_t *)malloc(sizeof(dynamic_lock_area_t));
	320	} else {
	321	while(old->next != NULL) {
	322	old = old->next;
	323	}
	324	new = old->next = (dynamic_lock_area_t *)malloc(sizeof(dynamic_lock_area_t));
	325	}
	326	new->next = NULL;
7624e8b2	327	if (area_start <= next_lockable_byte) {
	328	// lock areas are not lockable
	329	next_lockable_byte += size_in_bytes;
	330	}
	331	new->first_locked_byte = next_lockable_byte;
	332	new->byte_offset = area_start;
6e6f1099	333	new->size_in_bits = size_in_bits;
6e6f1099	334	new->bytes_locked_per_bit = bytes_locked_per_bit;
7624e8b2	335	next_lockable_byte += size_in_bits * bytes_locked_per_bit;
	336	}
	337	if (TLV_type == 0x02) { // a Reserved Memory Control TLV
	338	uint8_t pages_addr = TLV_value[0] >> 4;
	339	uint8_t byte_offset = TLV_value[0] & 0x0f;
	340	uint8_t size_in_bytes = TLV_value[1] ? TLV_value[1] : 256;
	341	uint8_t bytes_per_page = 1 << (TLV_value[2] & 0x0f);
	342	uint16_t area_start = pages_addr * bytes_per_page + byte_offset;
	343	PrintAndLog("Reserved Memory of %d bytes at byte offset 0x%02x.",
	344	size_in_bytes,
	345	area_start);
	346	reserved_memory_control_TLV_present = true;
	347	adjust_lock_areas(area_start, size_in_bytes); // reserved memory areas are not lockable
	348	if (area_start <= next_lockable_byte) {
	349	next_lockable_byte += size_in_bytes;
	350	}
de15fc5f	351	}
	352	}
	353
	354	if (!lock_TLV_present) {
	355	PrintAndLog("(No Lock Control TLV present)");
de15fc5f	356	}
7624e8b2	357
	358	if (!reserved_memory_control_TLV_present) {
	359	PrintAndLog("(No Reserved Memory Control TLV present)");
	360	}
de15fc5f	361	}
	362
	363
7624e8b2	364	// read all of the dynamic memory
7624e8b2	365	static int topaz_read_dynamic_data(void)
de15fc5f	366	{
7624e8b2	367	// first read the remaining block of segment 0
	368	if(topaz_read_block(topaz_tag.uid, 0x0f, &topaz_tag.dynamic_memory[0]) == -1) {
	369	PrintAndLog("Error while reading dynamic memory block %02x. Aborting...", 0x0f);
	370	return -1;
	371	}
de15fc5f	372
7624e8b2	373	// read the remaining segments
	374	uint8_t max_segment = topaz_tag.size / 128 - 1;
	375	for(uint8_t segment = 1; segment <= max_segment; segment++) {
	376	if(topaz_read_segment(topaz_tag.uid, segment, &topaz_tag.dynamic_memory[(segment-1)*128+8]) == -1) {
	377	PrintAndLog("Error while reading dynamic memory block %02x. Aborting...", 0x0f);
	378	return -1;
de15fc5f	379	}
	380	}
	381
7624e8b2	382	return 0;
	383	}
	384
	385
	386	// read and print the dynamic memory
	387	static void topaz_print_dynamic_data(void)
	388	{
	389	if (topaz_tag.size > TOPAZ_STATIC_MEMORY) {
	390	PrintAndLog("Dynamic Data blocks:");
	391	if (topaz_read_dynamic_data() == 0) {
	392	PrintAndLog("block# \| offset \| Data \| Locked(y/n)");
	393	char line[80];
	394	for (uint16_t blockno = 0x0f; blockno < topaz_tag.size/8; blockno++) {
	395	uint8_t block_data = &topaz_tag.dynamic_memory[(blockno-0x0f)8];
	396	char lockbits[9];
	397	for (uint16_t j = 0; j < 8; j++) {
	398	sprintf(&line[3*j], "%02x ", block_data[j]);
	399	lockbits[j] = topaz_byte_is_locked(blockno*8+j) ? 'y' : 'n';
	400	}
	401	lockbits[8] = '\0';
	402	PrintAndLog(" 0x%02x \| 0x%04x \| %s\| %-3s", blockno, blockno*8, line, lockbits);
	403	}
	404	}
de15fc5f	405	}
	406	}
	407
	408
	409	static void topaz_print_lifecycle_state(uint8_t *data)
	410	{
7624e8b2	411	// to be done
de15fc5f	412	}
	413
	414
	415	static void topaz_print_NDEF(uint8_t *data)
	416	{
7624e8b2	417	// to be done.
de15fc5f	418	}
de15fc5f	419
7624e8b2	420
7624e8b2	421	// read a Topaz tag and print some usefull information
05ddb52c	422	int CmdHFTopazReader(const char *Cmd)
05ddb52c	423	{
de15fc5f	424	int status;
	425	uint8_t atqa[2];
	426	uint8_t rid_response[8];
	427	uint8_t *uid_echo = &rid_response[2];
c5847ae8	428	uint8_t rall_response[124];
de15fc5f	429
	430	status = topaz_select(atqa, rid_response);
	431
	432	if (status == -1) {
	433	PrintAndLog("Error: couldn't receive ATQA");
	434	return -1;
	435	}
	436
	437	PrintAndLog("ATQA : %02x %02x", atqa[1], atqa[0]);
	438	if (atqa[1] != 0x0c && atqa[0] != 0x00) {
	439	PrintAndLog("Tag doesn't support the Topaz protocol.");
	440	topaz_switch_off_field();
	441	return -1;
	442	}
	443
	444	if (status == -2) {
	445	PrintAndLog("Error: tag didn't answer to RID");
	446	topaz_switch_off_field();
	447	return -1;
	448	}
	449
c5847ae8	450	topaz_tag.HR01[0] = rid_response[0];
	451	topaz_tag.HR01[1] = rid_response[1];
	452
de15fc5f	453	// ToDo: CRC check
	454	PrintAndLog("HR0 : %02x (%sa Topaz tag (%scapable of carrying a NDEF message), %s memory map)", rid_response[0],
	455	(rid_response[0] & 0xF0) == 0x10 ? "" : "not ",
	456	(rid_response[0] & 0xF0) == 0x10 ? "" : "not ",
	457	(rid_response[0] & 0x0F) == 0x10 ? "static" : "dynamic");
	458	PrintAndLog("HR1 : %02x", rid_response[1]);
	459
c5847ae8	460	status = topaz_rall(uid_echo, rall_response);
de15fc5f	461
	462	if(status == -1) {
	463	PrintAndLog("Error: tag didn't answer to RALL");
	464	topaz_switch_off_field();
	465	return -1;
	466	}
	467
c5847ae8	468	memcpy(topaz_tag.uid, rall_response+2, 7);
de15fc5f	469	PrintAndLog("UID : %02x %02x %02x %02x %02x %02x %02x",
c5847ae8	470	topaz_tag.uid[6],
	471	topaz_tag.uid[5],
	472	topaz_tag.uid[4],
	473	topaz_tag.uid[3],
	474	topaz_tag.uid[2],
	475	topaz_tag.uid[1],
	476	topaz_tag.uid[0]);
de15fc5f	477	PrintAndLog(" UID[6] (Manufacturer Byte) = %02x, Manufacturer: %s",
c5847ae8	478	topaz_tag.uid[6],
	479	getTagInfo(topaz_tag.uid[6]));
	480
7624e8b2	481	memcpy(topaz_tag.data_blocks, rall_response+2, 0x0f*8);
de15fc5f	482	PrintAndLog("");
de15fc5f	483	PrintAndLog("Static Data blocks 00 to 0c:");
6e6f1099	484	PrintAndLog("block# \| offset \| Data \| Locked(y/n)");
de15fc5f	485	char line[80];
de15fc5f	486	for (uint16_t i = 0; i <= 0x0c; i++) {
7624e8b2	487	char lockbits[9];
de15fc5f	488	for (uint16_t j = 0; j < 8; j++) {
c5847ae8	489	sprintf(&line[3j], "%02x ", topaz_tag.data_blocks[i][j] /rall_response[2 + 8i + j]/);
7624e8b2	490	lockbits[j] = topaz_byte_is_locked(i*8+j) ? 'y' : 'n';
de15fc5f	491	}
7624e8b2	492	lockbits[8] = '\0';
7624e8b2	493	PrintAndLog(" 0x%02x \| 0x%04x \| %s\| %-3s", i, i*8, line, lockbits);
de15fc5f	494	}
	495
	496	PrintAndLog("");
	497	PrintAndLog("Static Reserved block 0d:");
	498	for (uint16_t j = 0; j < 8; j++) {
c5847ae8	499	sprintf(&line[3*j], "%02x ", topaz_tag.data_blocks[0x0d][j]);
de15fc5f	500	}
6e6f1099	501	PrintAndLog(" 0x%02x \| 0x%04x \| %s\| %-3s", 0x0d, 0x0d*8, line, "n/a");
de15fc5f	502
de15fc5f	503	PrintAndLog("");
c5847ae8	504	PrintAndLog("Static Lockbits and OTP Bytes:");
de15fc5f	505	for (uint16_t j = 0; j < 8; j++) {
c5847ae8	506	sprintf(&line[3*j], "%02x ", topaz_tag.data_blocks[0x0e][j]);
de15fc5f	507	}
6e6f1099	508	PrintAndLog(" 0x%02x \| 0x%04x \| %s\| %-3s", 0x0e, 0x0e*8, line, "n/a");
de15fc5f	509
	510	PrintAndLog("");
	511
c5847ae8	512	status = topaz_print_CC(&topaz_tag.data_blocks[1][0]);
de15fc5f	513
de15fc5f	514	if (status == -1) {
7624e8b2	515	PrintAndLog("No NDEF message data present");
de15fc5f	516	topaz_switch_off_field();
	517	return 0;
	518	}
	519
	520	PrintAndLog("");
7624e8b2	521	topaz_print_control_TLVs(&topaz_tag.data_blocks[1][4]);
de15fc5f	522
de15fc5f	523	PrintAndLog("");
7624e8b2	524	topaz_print_dynamic_data();
7624e8b2	525
c5847ae8	526	topaz_print_lifecycle_state(&topaz_tag.data_blocks[1][0]);
de15fc5f	527
c5847ae8	528	topaz_print_NDEF(&topaz_tag.data_blocks[1][0]);
de15fc5f	529
de15fc5f	530	topaz_switch_off_field();
05ddb52c	531	return 0;
	532	}
	533
	534
05ddb52c	535	int CmdHFTopazCmdRaw(const char *Cmd)
05ddb52c	536	{
7624e8b2	537	PrintAndLog("not yet implemented. Use hf 14 raw with option -T.");
05ddb52c	538	return 0;
	539	}
	540
	541
	542	static int CmdHelp(const char *Cmd);
	543
	544
	545	static command_t CommandTable[] =
	546	{
	547	{"help", CmdHelp, 1, "This help"},
	548	{"reader", CmdHFTopazReader, 0, "Act like a Topaz reader"},
05ddb52c	549	{"snoop", CmdHF14ASnoop, 0, "Eavesdrop a Topaz reader-tag communication"},
	550	{"raw", CmdHFTopazCmdRaw, 0, "Send raw hex data to tag"},
	551	{NULL, NULL, 0, NULL}
	552	};
	553
	554
	555	int CmdHFTopaz(const char *Cmd) {
	556	// flush
	557	WaitForResponseTimeout(CMD_ACK,NULL,100);
	558
	559	// parse
	560	CmdsParse(CommandTable, Cmd);
	561	return 0;
	562	}
	563
7624e8b2	564
05ddb52c	565	static int CmdHelp(const char *Cmd)
	566	{
	567	CmdsHelp(CommandTable);
	568	return 0;
	569	}
	570
	571