[proxmark3-svn] / armsrc / mifareutil.c

//-----------------------------------------------------------------------------\r
// Merlok, May 2011, 2012\r
// Many authors, whom made it possible\r
//\r
// This code is licensed to you under the terms of the GNU GPL, version 2 or,\r
// at your option, any later version. See the LICENSE.txt file for the text of\r
// the license.\r
//-----------------------------------------------------------------------------\r
// Work with mifare cards.\r
//-----------------------------------------------------------------------------\r
\r
#include "proxmark3.h"\r
#include "apps.h"\r
#include "util.h"\r
#include "string.h"\r
\r
#include "iso14443crc.h"\r
#include "iso14443a.h"\r
#include "crapto1.h"\r
#include "mifareutil.h"\r
\r
int MF_DBGLEVEL = MF_DBG_ALL;\r
\r
// memory management\r
uint8_t* mifare_get_bigbufptr(void) {\r
	return (((uint8_t *)BigBuf) + MIFARE_BUFF_OFFSET);	// was 3560 - tied to other size changes\r
}\r
uint8_t* eml_get_bigbufptr_sendbuf(void) {\r
	return (((uint8_t *)BigBuf) + RECV_CMD_OFFSET);	\r
}\r
uint8_t* eml_get_bigbufptr_recbuf(void) {\r
	return (((uint8_t *)BigBuf) + MIFARE_BUFF_OFFSET);\r
}\r
uint8_t* eml_get_bigbufptr_cardmem(void) {\r
	return (((uint8_t *)BigBuf) + CARD_MEMORY);\r
}\r
\r
// crypto1 helpers\r
void mf_crypto1_decrypt(struct Crypto1State *pcs, uint8_t *data, int len){\r
	uint8_t	bt = 0;\r
	int i;\r
	\r
	if (len != 1) {\r
		for (i = 0; i < len; i++)\r
			data[i] = crypto1_byte(pcs, 0x00, 0) ^ data[i];\r
	} else {\r
		bt = 0;\r
		for (i = 0; i < 4; i++)\r
			bt |= (crypto1_bit(pcs, 0, 0) ^ BIT(data[0], i)) << i;\r
				\r
		data[0] = bt;\r
	}\r
	return;\r
}\r
\r
void mf_crypto1_encrypt(struct Crypto1State *pcs, uint8_t *data, int len, uint32_t *par) {\r
	uint8_t bt = 0;\r
	int i;\r
	uint32_t mltpl = 1 << (len - 1); // for len=18 it=0x20000\r
	*par = 0;\r
	for (i = 0; i < len; i++) {\r
		bt = data[i];\r
		data[i] = crypto1_byte(pcs, 0x00, 0) ^ data[i];\r
		*par = (*par >> 1) | ( ((filter(pcs->odd) ^ oddparity(bt)) & 0x01) * mltpl );\r
	}	\r
	return;\r
}\r
\r
uint8_t mf_crypto1_encrypt4bit(struct Crypto1State *pcs, uint8_t data) {\r
	uint8_t bt = 0;\r
	int i;\r
\r
	for (i = 0; i < 4; i++)\r
		bt |= (crypto1_bit(pcs, 0, 0) ^ BIT(data, i)) << i;\r
		\r
	return bt;\r
}\r
\r
// send commands\r
int mifare_sendcmd_short(struct Crypto1State *pcs, uint8_t crypted, uint8_t cmd, uint8_t data, uint8_t* answer)\r
{\r
	return mifare_sendcmd_shortex(pcs, crypted, cmd, data, answer, NULL);\r
}\r
\r
int mifare_sendcmd_shortex(struct Crypto1State *pcs, uint8_t crypted, uint8_t cmd, uint8_t data, uint8_t* answer, uint32_t * parptr)\r
{\r
	uint8_t dcmd[4], ecmd[4];\r
	uint32_t pos, par, res;\r
\r
	dcmd[0] = cmd;\r
	dcmd[1] = data;\r
	AppendCrc14443a(dcmd, 2);\r
	\r
	memcpy(ecmd, dcmd, sizeof(dcmd));\r
	\r
	if (crypted) {\r
		par = 0;\r
		for (pos = 0; pos < 4; pos++)\r
		{\r
			ecmd[pos] = crypto1_byte(pcs, 0x00, 0) ^ dcmd[pos];\r
			par = (par >> 1) | ( ((filter(pcs->odd) ^ oddparity(dcmd[pos])) & 0x01) * 0x08 );\r
		}	\r
\r
		ReaderTransmitPar(ecmd, sizeof(ecmd), par);\r
\r
	} else {\r
		ReaderTransmit(dcmd, sizeof(dcmd));\r
	}\r
\r
	int len = ReaderReceivePar(answer, &par);\r
	\r
	if (parptr) *parptr = par;\r
\r
	if (crypted == CRYPT_ALL) {\r
		if (len == 1) {\r
			res = 0;\r
			for (pos = 0; pos < 4; pos++)\r
				res |= (crypto1_bit(pcs, 0, 0) ^ BIT(answer[0], pos)) << pos;\r
				\r
			answer[0] = res;\r
			\r
		} else {\r
			for (pos = 0; pos < len; pos++)\r
			{\r
				answer[pos] = crypto1_byte(pcs, 0x00, 0) ^ answer[pos];\r
			}\r
		}\r
	}\r
	\r
	return len;\r
}\r
\r
// mifare commands\r
int mifare_classic_auth(struct Crypto1State *pcs, uint32_t uid, uint8_t blockNo, uint8_t keyType, uint64_t ui64Key, uint64_t isNested) \r
{\r
	return mifare_classic_authex(pcs, uid, blockNo, keyType, ui64Key, isNested, NULL);\r
}\r
\r
int mifare_classic_authex(struct Crypto1State *pcs, uint32_t uid, uint8_t blockNo, uint8_t keyType, uint64_t ui64Key, uint64_t isNested, uint32_t * ntptr) \r
{\r
	// variables\r
	int len;	\r
	uint32_t pos;\r
	uint8_t tmp4[4];\r
	byte_t par = 0;\r
	byte_t ar[4];\r
	uint32_t nt, ntpp; // Supplied tag nonce\r
	\r
	uint8_t mf_nr_ar[] = { 0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00 };\r
	uint8_t* receivedAnswer = mifare_get_bigbufptr();\r
\r
	// Transmit MIFARE_CLASSIC_AUTH\r
	len = mifare_sendcmd_short(pcs, isNested, 0x60 + (keyType & 0x01), blockNo, receivedAnswer);\r
  if (MF_DBGLEVEL >= 4)	Dbprintf("rand nonce len: %x", len);  \r
	if (len != 4) return 1;\r
	\r
	ar[0] = 0x55;\r
	ar[1] = 0x41;\r
	ar[2] = 0x49;\r
	ar[3] = 0x92; \r
	\r
	// Save the tag nonce (nt)\r
	nt = bytes_to_num(receivedAnswer, 4);\r
\r
	//  ----------------------------- crypto1 create\r
	if (isNested)\r
		crypto1_destroy(pcs);\r
\r
	// Init cipher with key\r
	crypto1_create(pcs, ui64Key);\r
\r
	if (isNested == AUTH_NESTED) {\r
		// decrypt nt with help of new key \r
		nt = crypto1_word(pcs, nt ^ uid, 1) ^ nt;\r
	} else {\r
		// Load (plain) uid^nt into the cipher\r
		crypto1_word(pcs, nt ^ uid, 0);\r
	}\r
\r
	// some statistic\r
	if (!ntptr && (MF_DBGLEVEL >= 3))\r
		Dbprintf("auth uid: %08x nt: %08x", uid, nt);  \r
	\r
	// save Nt\r
	if (ntptr)\r
		*ntptr = nt;\r
\r
	par = 0;\r
	// Generate (encrypted) nr+parity by loading it into the cipher (Nr)\r
	for (pos = 0; pos < 4; pos++)\r
	{\r
		mf_nr_ar[pos] = crypto1_byte(pcs, ar[pos], 0) ^ ar[pos];\r
		par = (par >> 1) | ( ((filter(pcs->odd) ^ oddparity(ar[pos])) & 0x01) * 0x80 );\r
	}	\r
		\r
	// Skip 32 bits in pseudo random generator\r
	nt = prng_successor(nt,32);\r
\r
	//  ar+parity\r
	for (pos = 4; pos < 8; pos++)\r
	{\r
		nt = prng_successor(nt,8);\r
		mf_nr_ar[pos] = crypto1_byte(pcs,0x00,0) ^ (nt & 0xff);\r
		par = (par >> 1)| ( ((filter(pcs->odd) ^ oddparity(nt & 0xff)) & 0x01) * 0x80 );\r
	}	\r
		\r
	// Transmit reader nonce and reader answer\r
	ReaderTransmitPar(mf_nr_ar, sizeof(mf_nr_ar), par);\r
\r
	// Receive 4 bit answer\r
	len = ReaderReceive(receivedAnswer);\r
	if (!len)\r
	{\r
		if (MF_DBGLEVEL >= 1)	Dbprintf("Authentication failed. Card timeout.");\r
		return 2;\r
	}\r
	\r
	memcpy(tmp4, receivedAnswer, 4);\r
	ntpp = prng_successor(nt, 32) ^ crypto1_word(pcs, 0,0);\r
	\r
	if (ntpp != bytes_to_num(tmp4, 4)) {\r
		if (MF_DBGLEVEL >= 1)	Dbprintf("Authentication failed. Error card response.");\r
		return 3;\r
	}\r
\r
	return 0;\r
}\r
\r
int mifare_classic_readblock(struct Crypto1State *pcs, uint32_t uid, uint8_t blockNo, uint8_t *blockData) \r
{\r
	// variables\r
	int len;	\r
	uint8_t	bt[2];\r
	\r
	uint8_t* receivedAnswer = mifare_get_bigbufptr();\r
	\r
	// command MIFARE_CLASSIC_READBLOCK\r
	len = mifare_sendcmd_short(pcs, 1, 0x30, blockNo, receivedAnswer);\r
	if (len == 1) {\r
		if (MF_DBGLEVEL >= 1)	Dbprintf("Cmd Error: %02x", receivedAnswer[0]);  \r
		return 1;\r
	}\r
	if (len != 18) {\r
		if (MF_DBGLEVEL >= 1)	Dbprintf("Cmd Error: card timeout. len: %x", len);  \r
		return 2;\r
	}\r
\r
	memcpy(bt, receivedAnswer + 16, 2);\r
	AppendCrc14443a(receivedAnswer, 16);\r
	if (bt[0] != receivedAnswer[16] || bt[1] != receivedAnswer[17]) {\r
		if (MF_DBGLEVEL >= 1)	Dbprintf("Cmd CRC response error.");  \r
		return 3;\r
	}\r
	\r
	memcpy(blockData, receivedAnswer, 16);\r
	return 0;\r
}\r
\r
int mifare_classic_writeblock(struct Crypto1State *pcs, uint32_t uid, uint8_t blockNo, uint8_t *blockData) \r
{\r
	// variables\r
	int len, i;	\r
	uint32_t pos;\r
	uint32_t par = 0;\r
	byte_t res;\r
	\r
	uint8_t d_block[18], d_block_enc[18];\r
	uint8_t* receivedAnswer = mifare_get_bigbufptr();\r
	\r
	// command MIFARE_CLASSIC_WRITEBLOCK\r
	len = mifare_sendcmd_short(pcs, 1, 0xA0, blockNo, receivedAnswer);\r
\r
	if ((len != 1) || (receivedAnswer[0] != 0x0A)) {   //  0x0a - ACK\r
		if (MF_DBGLEVEL >= 1)	Dbprintf("Cmd Error: %02x", receivedAnswer[0]);  \r
		return 1;\r
	}\r
	\r
	memcpy(d_block, blockData, 16);\r
	AppendCrc14443a(d_block, 16);\r
	\r
	// crypto\r
	par = 0;\r
	for (pos = 0; pos < 18; pos++)\r
	{\r
		d_block_enc[pos] = crypto1_byte(pcs, 0x00, 0) ^ d_block[pos];\r
		par = (par >> 1) | ( ((filter(pcs->odd) ^ oddparity(d_block[pos])) & 0x01) * 0x20000 );\r
	}	\r
\r
	ReaderTransmitPar(d_block_enc, sizeof(d_block_enc), par);\r
\r
	// Receive the response\r
	len = ReaderReceive(receivedAnswer);	\r
\r
	res = 0;\r
	for (i = 0; i < 4; i++)\r
		res |= (crypto1_bit(pcs, 0, 0) ^ BIT(receivedAnswer[0], i)) << i;\r
\r
	if ((len != 1) || (res != 0x0A)) {\r
		if (MF_DBGLEVEL >= 1)	Dbprintf("Cmd send data2 Error: %02x", res);  \r
		return 2;\r
	}\r
	\r
	return 0;\r
}\r
\r
int mifare_classic_halt(struct Crypto1State *pcs, uint32_t uid) \r
{\r
	// variables\r
	int len;	\r
	\r
	// Mifare HALT\r
	uint8_t* receivedAnswer = mifare_get_bigbufptr();\r
\r
	len = mifare_sendcmd_short(pcs, pcs == NULL ? 0:1, 0x50, 0x00, receivedAnswer);\r
	if (len != 0) {\r
		if (MF_DBGLEVEL >= 1)	Dbprintf("halt error. response len: %x", len);  \r
		return 1;\r
	}\r
\r
	return 0;\r
}\r
\r
// work with emulator memory\r
void emlSetMem(uint8_t *data, int blockNum, int blocksCount) {\r
	uint8_t* emCARD = eml_get_bigbufptr_cardmem();\r
	\r
	memcpy(emCARD + blockNum * 16, data, blocksCount * 16);\r
}\r
\r
void emlGetMem(uint8_t *data, int blockNum, int blocksCount) {\r
	uint8_t* emCARD = eml_get_bigbufptr_cardmem();\r
	\r
	memcpy(data, emCARD + blockNum * 16, blocksCount * 16);\r
}\r
\r
void emlGetMemBt(uint8_t *data, int bytePtr, int byteCount) {\r
	uint8_t* emCARD = eml_get_bigbufptr_cardmem();\r
	\r
	memcpy(data, emCARD + bytePtr, byteCount);\r
}\r
\r
int emlCheckValBl(int blockNum) {\r
	uint8_t* emCARD = eml_get_bigbufptr_cardmem();\r
	uint8_t* data = emCARD + blockNum * 16;\r
\r
	if ((data[0] != (data[4] ^ 0xff)) || (data[0] != data[8]) ||\r
			(data[1] != (data[5] ^ 0xff)) || (data[1] != data[9]) ||\r
			(data[2] != (data[6] ^ 0xff)) || (data[2] != data[10]) ||\r
			(data[3] != (data[7] ^ 0xff)) || (data[3] != data[11]) ||\r
			(data[12] != (data[13] ^ 0xff)) || (data[12] != data[14]) ||\r
			(data[12] != (data[15] ^ 0xff))\r
		 ) \r
		return 1;\r
	return 0;\r
}\r
\r
int emlGetValBl(uint32_t *blReg, uint8_t *blBlock, int blockNum) {\r
	uint8_t* emCARD = eml_get_bigbufptr_cardmem();\r
	uint8_t* data = emCARD + blockNum * 16;\r
	\r
	if (emlCheckValBl(blockNum)) {\r
		return 1;\r
	}\r
	\r
	memcpy(blReg, data, 4);\r
	*blBlock = data[12];\r
	\r
	return 0;\r
}\r
\r
int emlSetValBl(uint32_t blReg, uint8_t blBlock, int blockNum) {\r
	uint8_t* emCARD = eml_get_bigbufptr_cardmem();\r
	uint8_t* data = emCARD + blockNum * 16;\r
	\r
	memcpy(data + 0, &blReg, 4);\r
	memcpy(data + 8, &blReg, 4);\r
	blReg = blReg ^ 0xffffffff;\r
	memcpy(data + 4, &blReg, 4);\r
	\r
	data[12] = blBlock;\r
	data[13] = blBlock ^ 0xff;\r
	data[14] = blBlock;\r
	data[15] = blBlock ^ 0xff;\r
	\r
	return 0;\r
}\r
\r
uint64_t emlGetKey(int sectorNum, int keyType) {\r
	uint8_t key[6];\r
	uint8_t* emCARD = eml_get_bigbufptr_cardmem();\r
	\r
	memcpy(key, emCARD + 3 * 16 + sectorNum * 4 * 16 + keyType * 10, 6);\r
	return bytes_to_num(key, 6);\r
}\r
\r
void emlClearMem(void) {\r
	int b;\r
	\r
	const uint8_t trailer[] = {0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0x07, 0x80, 0x69, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff};\r
	const uint8_t uid[]   =   {0xe6, 0x84, 0x87, 0xf3, 0x16, 0x88, 0x04, 0x00, 0x46, 0x8e, 0x45, 0x55, 0x4d, 0x70, 0x41, 0x04};\r
	uint8_t* emCARD = eml_get_bigbufptr_cardmem();\r
	\r
	memset(emCARD, 0, CARD_MEMORY_LEN);\r
	\r
	// fill sectors trailer data\r
	for(b = 3; b < 256; b<127?(b+=4):(b+=16)) {\r
		emlSetMem((uint8_t *)trailer, b , 1);\r
	}	\r
\r
	// uid\r
	emlSetMem((uint8_t *)uid, 0, 1);\r
	return;\r
}\r
Commit	Line	Data
20f9a2a1	1	//-----------------------------------------------------------------------------\r
b62a5a84	2	// Merlok, May 2011, 2012\r
8f51ddb0	3	// Many authors, whom made it possible\r
20f9a2a1 M	4	//\r
	5	// This code is licensed to you under the terms of the GNU GPL, version 2 or,\r
	6	// at your option, any later version. See the LICENSE.txt file for the text of\r
	7	// the license.\r
	8	//-----------------------------------------------------------------------------\r
8f51ddb0	9	// Work with mifare cards.\r
20f9a2a1 M	10	//-----------------------------------------------------------------------------\r
	11	\r
	12	#include "proxmark3.h"\r
	13	#include "apps.h"\r
	14	#include "util.h"\r
	15	#include "string.h"\r
	16	\r
	17	#include "iso14443crc.h"\r
	18	#include "iso14443a.h"\r
	19	#include "crapto1.h"\r
	20	#include "mifareutil.h"\r
	21	\r
f397b5cc M	22	int MF_DBGLEVEL = MF_DBG_ALL;\r
f397b5cc M	23	\r
8f51ddb0	24	// memory management\r
20f9a2a1	25	uint8_t* mifare_get_bigbufptr(void) {\r
8f51ddb0 M	26	return (((uint8_t *)BigBuf) + MIFARE_BUFF_OFFSET); // was 3560 - tied to other size changes\r
	27	}\r
	28	uint8_t* eml_get_bigbufptr_sendbuf(void) {\r
	29	return (((uint8_t *)BigBuf) + RECV_CMD_OFFSET); \r
	30	}\r
	31	uint8_t* eml_get_bigbufptr_recbuf(void) {\r
	32	return (((uint8_t *)BigBuf) + MIFARE_BUFF_OFFSET);\r
	33	}\r
	34	uint8_t* eml_get_bigbufptr_cardmem(void) {\r
	35	return (((uint8_t *)BigBuf) + CARD_MEMORY);\r
	36	}\r
	37	\r
	38	// crypto1 helpers\r
	39	void mf_crypto1_decrypt(struct Crypto1State pcs, uint8_t data, int len){\r
	40	uint8_t bt = 0;\r
	41	int i;\r
	42	\r
	43	if (len != 1) {\r
	44	for (i = 0; i < len; i++)\r
	45	data[i] = crypto1_byte(pcs, 0x00, 0) ^ data[i];\r
	46	} else {\r
	47	bt = 0;\r
	48	for (i = 0; i < 4; i++)\r
	49	bt \|= (crypto1_bit(pcs, 0, 0) ^ BIT(data[0], i)) << i;\r
	50	\r
	51	data[0] = bt;\r
	52	}\r
	53	return;\r
	54	}\r
	55	\r
	56	void mf_crypto1_encrypt(struct Crypto1State pcs, uint8_t data, int len, uint32_t *par) {\r
	57	uint8_t bt = 0;\r
	58	int i;\r
	59	uint32_t mltpl = 1 << (len - 1); // for len=18 it=0x20000\r
	60	*par = 0;\r
	61	for (i = 0; i < len; i++) {\r
	62	bt = data[i];\r
	63	data[i] = crypto1_byte(pcs, 0x00, 0) ^ data[i];\r
	64	par = (par >> 1) \| ( ((filter(pcs->odd) ^ oddparity(bt)) & 0x01) * mltpl );\r
	65	} \r
	66	return;\r
	67	}\r
	68	\r
	69	uint8_t mf_crypto1_encrypt4bit(struct Crypto1State *pcs, uint8_t data) {\r
	70	uint8_t bt = 0;\r
	71	int i;\r
	72	\r
	73	for (i = 0; i < 4; i++)\r
	74	bt \|= (crypto1_bit(pcs, 0, 0) ^ BIT(data, i)) << i;\r
	75	\r
	76	return bt;\r
20f9a2a1 M	77	}\r
20f9a2a1 M	78	\r
8f51ddb0	79	// send commands\r
20f9a2a1	80	int mifare_sendcmd_short(struct Crypto1State pcs, uint8_t crypted, uint8_t cmd, uint8_t data, uint8_t answer)\r
f89c7050 M	81	{\r
	82	return mifare_sendcmd_shortex(pcs, crypted, cmd, data, answer, NULL);\r
	83	}\r
	84	\r
	85	int mifare_sendcmd_shortex(struct Crypto1State pcs, uint8_t crypted, uint8_t cmd, uint8_t data, uint8_t answer, uint32_t * parptr)\r
20f9a2a1 M	86	{\r
	87	uint8_t dcmd[4], ecmd[4];\r
	88	uint32_t pos, par, res;\r
	89	\r
	90	dcmd[0] = cmd;\r
	91	dcmd[1] = data;\r
	92	AppendCrc14443a(dcmd, 2);\r
	93	\r
	94	memcpy(ecmd, dcmd, sizeof(dcmd));\r
	95	\r
	96	if (crypted) {\r
	97	par = 0;\r
	98	for (pos = 0; pos < 4; pos++)\r
	99	{\r
	100	ecmd[pos] = crypto1_byte(pcs, 0x00, 0) ^ dcmd[pos];\r
	101	par = (par >> 1) \| ( ((filter(pcs->odd) ^ oddparity(dcmd[pos])) & 0x01) * 0x08 );\r
	102	} \r
	103	\r
	104	ReaderTransmitPar(ecmd, sizeof(ecmd), par);\r
	105	\r
	106	} else {\r
	107	ReaderTransmit(dcmd, sizeof(dcmd));\r
	108	}\r
	109	\r
f89c7050 M	110	int len = ReaderReceivePar(answer, &par);\r
	111	\r
	112	if (parptr) *parptr = par;\r
20f9a2a1	113	\r
4abe4f58	114	if (crypted == CRYPT_ALL) {\r
20f9a2a1 M	115	if (len == 1) {\r
	116	res = 0;\r
	117	for (pos = 0; pos < 4; pos++)\r
	118	res \|= (crypto1_bit(pcs, 0, 0) ^ BIT(answer[0], pos)) << pos;\r
	119	\r
	120	answer[0] = res;\r
	121	\r
	122	} else {\r
	123	for (pos = 0; pos < len; pos++)\r
	124	{\r
	125	answer[pos] = crypto1_byte(pcs, 0x00, 0) ^ answer[pos];\r
	126	}\r
	127	}\r
	128	}\r
	129	\r
	130	return len;\r
	131	}\r
	132	\r
8f51ddb0	133	// mifare commands\r
20f9a2a1	134	int mifare_classic_auth(struct Crypto1State *pcs, uint32_t uid, uint8_t blockNo, uint8_t keyType, uint64_t ui64Key, uint64_t isNested) \r
f89c7050 M	135	{\r
	136	return mifare_classic_authex(pcs, uid, blockNo, keyType, ui64Key, isNested, NULL);\r
	137	}\r
	138	\r
	139	int mifare_classic_authex(struct Crypto1State pcs, uint32_t uid, uint8_t blockNo, uint8_t keyType, uint64_t ui64Key, uint64_t isNested, uint32_t ntptr) \r
20f9a2a1 M	140	{\r
20f9a2a1 M	141	// variables\r
4abe4f58	142	int len; \r
20f9a2a1 M	143	uint32_t pos;\r
20f9a2a1 M	144	uint8_t tmp4[4];\r
4abe4f58 M	145	byte_t par = 0;\r
4abe4f58 M	146	byte_t ar[4];\r
20f9a2a1 M	147	uint32_t nt, ntpp; // Supplied tag nonce\r
	148	\r
	149	uint8_t mf_nr_ar[] = { 0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00 };\r
4abe4f58	150	uint8_t* receivedAnswer = mifare_get_bigbufptr();\r
20f9a2a1	151	\r
4abe4f58	152	// Transmit MIFARE_CLASSIC_AUTH\r
20f9a2a1	153	len = mifare_sendcmd_short(pcs, isNested, 0x60 + (keyType & 0x01), blockNo, receivedAnswer);\r
f397b5cc	154	if (MF_DBGLEVEL >= 4) Dbprintf("rand nonce len: %x", len); \r
4abe4f58	155	if (len != 4) return 1;\r
20f9a2a1 M	156	\r
	157	ar[0] = 0x55;\r
	158	ar[1] = 0x41;\r
	159	ar[2] = 0x49;\r
	160	ar[3] = 0x92; \r
	161	\r
	162	// Save the tag nonce (nt)\r
	163	nt = bytes_to_num(receivedAnswer, 4);\r
20f9a2a1 M	164	\r
20f9a2a1 M	165	// ----------------------------- crypto1 create\r
4abe4f58 M	166	if (isNested)\r
	167	crypto1_destroy(pcs);\r
	168	\r
	169	// Init cipher with key\r
20f9a2a1 M	170	crypto1_create(pcs, ui64Key);\r
20f9a2a1 M	171	\r
4abe4f58 M	172	if (isNested == AUTH_NESTED) {\r
	173	// decrypt nt with help of new key \r
	174	nt = crypto1_word(pcs, nt ^ uid, 1) ^ nt;\r
	175	} else {\r
	176	// Load (plain) uid^nt into the cipher\r
	177	crypto1_word(pcs, nt ^ uid, 0);\r
	178	}\r
	179	\r
	180	// some statistic\r
f397b5cc	181	if (!ntptr && (MF_DBGLEVEL >= 3))\r
f89c7050 M	182	Dbprintf("auth uid: %08x nt: %08x", uid, nt); \r
	183	\r
	184	// save Nt\r
	185	if (ntptr)\r
	186	*ntptr = nt;\r
20f9a2a1 M	187	\r
20f9a2a1 M	188	par = 0;\r
4abe4f58 M	189	// Generate (encrypted) nr+parity by loading it into the cipher (Nr)\r
	190	for (pos = 0; pos < 4; pos++)\r
	191	{\r
	192	mf_nr_ar[pos] = crypto1_byte(pcs, ar[pos], 0) ^ ar[pos];\r
20f9a2a1	193	par = (par >> 1) \| ( ((filter(pcs->odd) ^ oddparity(ar[pos])) & 0x01) * 0x80 );\r
4abe4f58	194	} \r
20f9a2a1	195	\r
4abe4f58 M	196	// Skip 32 bits in pseudo random generator\r
4abe4f58 M	197	nt = prng_successor(nt,32);\r
20f9a2a1 M	198	\r
20f9a2a1 M	199	// ar+parity\r
4abe4f58 M	200	for (pos = 4; pos < 8; pos++)\r
4abe4f58 M	201	{\r
20f9a2a1	202	nt = prng_successor(nt,8);\r
4abe4f58	203	mf_nr_ar[pos] = crypto1_byte(pcs,0x00,0) ^ (nt & 0xff);\r
20f9a2a1	204	par = (par >> 1)\| ( ((filter(pcs->odd) ^ oddparity(nt & 0xff)) & 0x01) * 0x80 );\r
4abe4f58	205	} \r
20f9a2a1	206	\r
4abe4f58 M	207	// Transmit reader nonce and reader answer\r
4abe4f58 M	208	ReaderTransmitPar(mf_nr_ar, sizeof(mf_nr_ar), par);\r
20f9a2a1	209	\r
4abe4f58	210	// Receive 4 bit answer\r
20f9a2a1	211	len = ReaderReceive(receivedAnswer);\r
4abe4f58 M	212	if (!len)\r
4abe4f58 M	213	{\r
f397b5cc	214	if (MF_DBGLEVEL >= 1) Dbprintf("Authentication failed. Card timeout.");\r
20f9a2a1	215	return 2;\r
4abe4f58	216	}\r
20f9a2a1	217	\r
4abe4f58	218	memcpy(tmp4, receivedAnswer, 4);\r
20f9a2a1 M	219	ntpp = prng_successor(nt, 32) ^ crypto1_word(pcs, 0,0);\r
	220	\r
	221	if (ntpp != bytes_to_num(tmp4, 4)) {\r
f397b5cc	222	if (MF_DBGLEVEL >= 1) Dbprintf("Authentication failed. Error card response.");\r
20f9a2a1 M	223	return 3;\r
	224	}\r
	225	\r
	226	return 0;\r
	227	}\r
	228	\r
	229	int mifare_classic_readblock(struct Crypto1State pcs, uint32_t uid, uint8_t blockNo, uint8_t blockData) \r
	230	{\r
	231	// variables\r
4abe4f58	232	int len; \r
20f9a2a1 M	233	uint8_t bt[2];\r
20f9a2a1 M	234	\r
4abe4f58	235	uint8_t* receivedAnswer = mifare_get_bigbufptr();\r
20f9a2a1	236	\r
4abe4f58	237	// command MIFARE_CLASSIC_READBLOCK\r
20f9a2a1 M	238	len = mifare_sendcmd_short(pcs, 1, 0x30, blockNo, receivedAnswer);\r
20f9a2a1 M	239	if (len == 1) {\r
f397b5cc	240	if (MF_DBGLEVEL >= 1) Dbprintf("Cmd Error: %02x", receivedAnswer[0]); \r
20f9a2a1 M	241	return 1;\r
	242	}\r
	243	if (len != 18) {\r
f397b5cc	244	if (MF_DBGLEVEL >= 1) Dbprintf("Cmd Error: card timeout. len: %x", len); \r
20f9a2a1 M	245	return 2;\r
	246	}\r
	247	\r
	248	memcpy(bt, receivedAnswer + 16, 2);\r
4abe4f58	249	AppendCrc14443a(receivedAnswer, 16);\r
20f9a2a1	250	if (bt[0] != receivedAnswer[16] \|\| bt[1] != receivedAnswer[17]) {\r
f397b5cc	251	if (MF_DBGLEVEL >= 1) Dbprintf("Cmd CRC response error."); \r
20f9a2a1 M	252	return 3;\r
	253	}\r
	254	\r
	255	memcpy(blockData, receivedAnswer, 16);\r
	256	return 0;\r
	257	}\r
	258	\r
	259	int mifare_classic_writeblock(struct Crypto1State pcs, uint32_t uid, uint8_t blockNo, uint8_t blockData) \r
	260	{\r
	261	// variables\r
4abe4f58	262	int len, i; \r
20f9a2a1	263	uint32_t pos;\r
4abe4f58 M	264	uint32_t par = 0;\r
4abe4f58 M	265	byte_t res;\r
20f9a2a1 M	266	\r
20f9a2a1 M	267	uint8_t d_block[18], d_block_enc[18];\r
4abe4f58	268	uint8_t* receivedAnswer = mifare_get_bigbufptr();\r
20f9a2a1	269	\r
4abe4f58	270	// command MIFARE_CLASSIC_WRITEBLOCK\r
20f9a2a1 M	271	len = mifare_sendcmd_short(pcs, 1, 0xA0, blockNo, receivedAnswer);\r
	272	\r
	273	if ((len != 1) \|\| (receivedAnswer[0] != 0x0A)) { // 0x0a - ACK\r
f397b5cc	274	if (MF_DBGLEVEL >= 1) Dbprintf("Cmd Error: %02x", receivedAnswer[0]); \r
20f9a2a1 M	275	return 1;\r
	276	}\r
	277	\r
	278	memcpy(d_block, blockData, 16);\r
	279	AppendCrc14443a(d_block, 16);\r
	280	\r
	281	// crypto\r
	282	par = 0;\r
4abe4f58 M	283	for (pos = 0; pos < 18; pos++)\r
	284	{\r
	285	d_block_enc[pos] = crypto1_byte(pcs, 0x00, 0) ^ d_block[pos];\r
20f9a2a1	286	par = (par >> 1) \| ( ((filter(pcs->odd) ^ oddparity(d_block[pos])) & 0x01) * 0x20000 );\r
4abe4f58	287	} \r
20f9a2a1	288	\r
4abe4f58	289	ReaderTransmitPar(d_block_enc, sizeof(d_block_enc), par);\r
20f9a2a1	290	\r
4abe4f58	291	// Receive the response\r
20f9a2a1 M	292	len = ReaderReceive(receivedAnswer); \r
	293	\r
	294	res = 0;\r
	295	for (i = 0; i < 4; i++)\r
	296	res \|= (crypto1_bit(pcs, 0, 0) ^ BIT(receivedAnswer[0], i)) << i;\r
	297	\r
	298	if ((len != 1) \|\| (res != 0x0A)) {\r
f397b5cc	299	if (MF_DBGLEVEL >= 1) Dbprintf("Cmd send data2 Error: %02x", res); \r
20f9a2a1 M	300	return 2;\r
	301	}\r
	302	\r
	303	return 0;\r
	304	}\r
	305	\r
	306	int mifare_classic_halt(struct Crypto1State *pcs, uint32_t uid) \r
	307	{\r
	308	// variables\r
4abe4f58	309	int len; \r
20f9a2a1 M	310	\r
20f9a2a1 M	311	// Mifare HALT\r
4abe4f58	312	uint8_t* receivedAnswer = mifare_get_bigbufptr();\r
20f9a2a1	313	\r
0675f200	314	len = mifare_sendcmd_short(pcs, pcs == NULL ? 0:1, 0x50, 0x00, receivedAnswer);\r
4abe4f58	315	if (len != 0) {\r
f397b5cc	316	if (MF_DBGLEVEL >= 1) Dbprintf("halt error. response len: %x", len); \r
20f9a2a1 M	317	return 1;\r
	318	}\r
	319	\r
	320	return 0;\r
	321	}\r
9ca155ba	322	\r
8f51ddb0 M	323	// work with emulator memory\r
	324	void emlSetMem(uint8_t *data, int blockNum, int blocksCount) {\r
	325	uint8_t* emCARD = eml_get_bigbufptr_cardmem();\r
	326	\r
	327	memcpy(emCARD + blockNum * 16, data, blocksCount * 16);\r
	328	}\r
	329	\r
	330	void emlGetMem(uint8_t *data, int blockNum, int blocksCount) {\r
	331	uint8_t* emCARD = eml_get_bigbufptr_cardmem();\r
	332	\r
	333	memcpy(data, emCARD + blockNum * 16, blocksCount * 16);\r
	334	}\r
	335	\r
	336	void emlGetMemBt(uint8_t *data, int bytePtr, int byteCount) {\r
	337	uint8_t* emCARD = eml_get_bigbufptr_cardmem();\r
	338	\r
	339	memcpy(data, emCARD + bytePtr, byteCount);\r
	340	}\r
	341	\r
0014cb46 M	342	int emlCheckValBl(int blockNum) {\r
	343	uint8_t* emCARD = eml_get_bigbufptr_cardmem();\r
	344	uint8_t* data = emCARD + blockNum * 16;\r
	345	\r
	346	if ((data[0] != (data[4] ^ 0xff)) \|\| (data[0] != data[8]) \|\|\r
	347	(data[1] != (data[5] ^ 0xff)) \|\| (data[1] != data[9]) \|\|\r
	348	(data[2] != (data[6] ^ 0xff)) \|\| (data[2] != data[10]) \|\|\r
	349	(data[3] != (data[7] ^ 0xff)) \|\| (data[3] != data[11]) \|\|\r
	350	(data[12] != (data[13] ^ 0xff)) \|\| (data[12] != data[14]) \|\|\r
	351	(data[12] != (data[15] ^ 0xff))\r
	352	) \r
	353	return 1;\r
	354	return 0;\r
	355	}\r
	356	\r
	357	int emlGetValBl(uint32_t blReg, uint8_t blBlock, int blockNum) {\r
	358	uint8_t* emCARD = eml_get_bigbufptr_cardmem();\r
	359	uint8_t* data = emCARD + blockNum * 16;\r
	360	\r
	361	if (emlCheckValBl(blockNum)) {\r
	362	return 1;\r
	363	}\r
	364	\r
	365	memcpy(blReg, data, 4);\r
	366	*blBlock = data[12];\r
	367	\r
	368	return 0;\r
	369	}\r
	370	\r
	371	int emlSetValBl(uint32_t blReg, uint8_t blBlock, int blockNum) {\r
	372	uint8_t* emCARD = eml_get_bigbufptr_cardmem();\r
	373	uint8_t* data = emCARD + blockNum * 16;\r
	374	\r
	375	memcpy(data + 0, &blReg, 4);\r
	376	memcpy(data + 8, &blReg, 4);\r
	377	blReg = blReg ^ 0xffffffff;\r
	378	memcpy(data + 4, &blReg, 4);\r
	379	\r
	380	data[12] = blBlock;\r
	381	data[13] = blBlock ^ 0xff;\r
	382	data[14] = blBlock;\r
	383	data[15] = blBlock ^ 0xff;\r
	384	\r
	385	return 0;\r
	386	}\r
	387	\r
8556b852 M	388	uint64_t emlGetKey(int sectorNum, int keyType) {\r
	389	uint8_t key[6];\r
	390	uint8_t* emCARD = eml_get_bigbufptr_cardmem();\r
	391	\r
	392	memcpy(key, emCARD + 3 * 16 + sectorNum * 4 * 16 + keyType * 10, 6);\r
	393	return bytes_to_num(key, 6);\r
	394	}\r
	395	\r
8f51ddb0	396	void emlClearMem(void) {\r
aea4d766	397	int b;\r
8f51ddb0 M	398	\r
8f51ddb0 M	399	const uint8_t trailer[] = {0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0x07, 0x80, 0x69, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff};\r
8f51ddb0	400	const uint8_t uid[] = {0xe6, 0x84, 0x87, 0xf3, 0x16, 0x88, 0x04, 0x00, 0x46, 0x8e, 0x45, 0x55, 0x4d, 0x70, 0x41, 0x04};\r
aea4d766	401	uint8_t* emCARD = eml_get_bigbufptr_cardmem();\r
	402	\r
	403	memset(emCARD, 0, CARD_MEMORY_LEN);\r
	404	\r
	405	// fill sectors trailer data\r
	406	for(b = 3; b < 256; b<127?(b+=4):(b+=16)) {\r
	407	emlSetMem((uint8_t *)trailer, b , 1);\r
	408	} \r
8f51ddb0 M	409	\r
	410	// uid\r
	411	emlSetMem((uint8_t *)uid, 0, 1);\r
	412	return;\r
	413	}\r