[proxmark3-svn] / armsrc / mifareutil.c

//-----------------------------------------------------------------------------\r
// Merlok, May 2011\r
// Many authors, that makes 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
// code for 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
uint8_t* mifare_get_bigbufptr(void) {\r
	return (((uint8_t *)BigBuf) + 3560);	// was 3560 - tied to other size changes\r
}\r
\r
int mifare_sendcmd_short(struct Crypto1State *pcs, uint8_t crypted, uint8_t cmd, uint8_t data, uint8_t* answer)\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 = ReaderReceive(answer);\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
int mifare_classic_auth(struct Crypto1State *pcs, uint32_t uid, uint8_t blockNo, uint8_t keyType, uint64_t ui64Key, uint64_t isNested) \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
//	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
	Dbprintf("auth uid: %08x nt: %08x", uid, 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
		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
		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
		Dbprintf("Cmd Error: %02x", receivedAnswer[0]);  \r
		return 1;\r
	}\r
	if (len != 18) {\r
		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
		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
		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
		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, 1, 0x50, 0x00, receivedAnswer);\r
	if (len != 0) {\r
		Dbprintf("halt error. response len: %x", len);  \r
		return 1;\r
	}\r
\r
	return 0;\r
}\r
Commit	Line	Data
20f9a2a1 M	1	//-----------------------------------------------------------------------------\r
	2	// Merlok, May 2011\r
	3	// Many authors, that makes it possible\r
	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
	9	// code for work with mifare cards.\r
	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
	22	uint8_t* mifare_get_bigbufptr(void) {\r
	23	return (((uint8_t *)BigBuf) + 3560); // was 3560 - tied to other size changes\r
	24	}\r
	25	\r
	26	int mifare_sendcmd_short(struct Crypto1State pcs, uint8_t crypted, uint8_t cmd, uint8_t data, uint8_t answer)\r
	27	{\r
	28	uint8_t dcmd[4], ecmd[4];\r
	29	uint32_t pos, par, res;\r
	30	\r
	31	dcmd[0] = cmd;\r
	32	dcmd[1] = data;\r
	33	AppendCrc14443a(dcmd, 2);\r
	34	\r
	35	memcpy(ecmd, dcmd, sizeof(dcmd));\r
	36	\r
	37	if (crypted) {\r
	38	par = 0;\r
	39	for (pos = 0; pos < 4; pos++)\r
	40	{\r
	41	ecmd[pos] = crypto1_byte(pcs, 0x00, 0) ^ dcmd[pos];\r
	42	par = (par >> 1) \| ( ((filter(pcs->odd) ^ oddparity(dcmd[pos])) & 0x01) * 0x08 );\r
	43	} \r
	44	\r
	45	ReaderTransmitPar(ecmd, sizeof(ecmd), par);\r
	46	\r
	47	} else {\r
	48	ReaderTransmit(dcmd, sizeof(dcmd));\r
	49	}\r
	50	\r
	51	int len = ReaderReceive(answer);\r
	52	\r
4abe4f58	53	if (crypted == CRYPT_ALL) {\r
20f9a2a1 M	54	if (len == 1) {\r
	55	res = 0;\r
	56	for (pos = 0; pos < 4; pos++)\r
	57	res \|= (crypto1_bit(pcs, 0, 0) ^ BIT(answer[0], pos)) << pos;\r
	58	\r
	59	answer[0] = res;\r
	60	\r
	61	} else {\r
	62	for (pos = 0; pos < len; pos++)\r
	63	{\r
	64	answer[pos] = crypto1_byte(pcs, 0x00, 0) ^ answer[pos];\r
	65	}\r
	66	}\r
	67	}\r
	68	\r
	69	return len;\r
	70	}\r
	71	\r
	72	int mifare_classic_auth(struct Crypto1State *pcs, uint32_t uid, uint8_t blockNo, uint8_t keyType, uint64_t ui64Key, uint64_t isNested) \r
	73	{\r
	74	// variables\r
4abe4f58	75	int len; \r
20f9a2a1 M	76	uint32_t pos;\r
20f9a2a1 M	77	uint8_t tmp4[4];\r
4abe4f58 M	78	byte_t par = 0;\r
4abe4f58 M	79	byte_t ar[4];\r
20f9a2a1 M	80	uint32_t nt, ntpp; // Supplied tag nonce\r
	81	\r
	82	uint8_t mf_nr_ar[] = { 0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00 };\r
4abe4f58	83	uint8_t* receivedAnswer = mifare_get_bigbufptr();\r
20f9a2a1	84	\r
4abe4f58	85	// Transmit MIFARE_CLASSIC_AUTH\r
20f9a2a1 M	86	len = mifare_sendcmd_short(pcs, isNested, 0x60 + (keyType & 0x01), blockNo, receivedAnswer);\r
20f9a2a1 M	87	// Dbprintf("rand nonce len: %x", len); \r
4abe4f58	88	if (len != 4) return 1;\r
20f9a2a1 M	89	\r
	90	ar[0] = 0x55;\r
	91	ar[1] = 0x41;\r
	92	ar[2] = 0x49;\r
	93	ar[3] = 0x92; \r
	94	\r
	95	// Save the tag nonce (nt)\r
	96	nt = bytes_to_num(receivedAnswer, 4);\r
20f9a2a1 M	97	\r
20f9a2a1 M	98	// ----------------------------- crypto1 create\r
4abe4f58 M	99	if (isNested)\r
	100	crypto1_destroy(pcs);\r
	101	\r
	102	// Init cipher with key\r
20f9a2a1 M	103	crypto1_create(pcs, ui64Key);\r
20f9a2a1 M	104	\r
4abe4f58 M	105	if (isNested == AUTH_NESTED) {\r
	106	// decrypt nt with help of new key \r
	107	nt = crypto1_word(pcs, nt ^ uid, 1) ^ nt;\r
	108	} else {\r
	109	// Load (plain) uid^nt into the cipher\r
	110	crypto1_word(pcs, nt ^ uid, 0);\r
	111	}\r
	112	\r
	113	// some statistic\r
	114	Dbprintf("auth uid: %08x nt: %08x", uid, nt); \r
20f9a2a1 M	115	\r
20f9a2a1 M	116	par = 0;\r
4abe4f58 M	117	// Generate (encrypted) nr+parity by loading it into the cipher (Nr)\r
	118	for (pos = 0; pos < 4; pos++)\r
	119	{\r
	120	mf_nr_ar[pos] = crypto1_byte(pcs, ar[pos], 0) ^ ar[pos];\r
20f9a2a1	121	par = (par >> 1) \| ( ((filter(pcs->odd) ^ oddparity(ar[pos])) & 0x01) * 0x80 );\r
4abe4f58	122	} \r
20f9a2a1	123	\r
4abe4f58 M	124	// Skip 32 bits in pseudo random generator\r
4abe4f58 M	125	nt = prng_successor(nt,32);\r
20f9a2a1 M	126	\r
20f9a2a1 M	127	// ar+parity\r
4abe4f58 M	128	for (pos = 4; pos < 8; pos++)\r
4abe4f58 M	129	{\r
20f9a2a1	130	nt = prng_successor(nt,8);\r
4abe4f58	131	mf_nr_ar[pos] = crypto1_byte(pcs,0x00,0) ^ (nt & 0xff);\r
20f9a2a1	132	par = (par >> 1)\| ( ((filter(pcs->odd) ^ oddparity(nt & 0xff)) & 0x01) * 0x80 );\r
4abe4f58	133	} \r
20f9a2a1	134	\r
4abe4f58 M	135	// Transmit reader nonce and reader answer\r
4abe4f58 M	136	ReaderTransmitPar(mf_nr_ar, sizeof(mf_nr_ar), par);\r
20f9a2a1	137	\r
4abe4f58	138	// Receive 4 bit answer\r
20f9a2a1	139	len = ReaderReceive(receivedAnswer);\r
4abe4f58 M	140	if (!len)\r
	141	{\r
	142	Dbprintf("Authentication failed. Card timeout.");\r
20f9a2a1	143	return 2;\r
4abe4f58	144	}\r
20f9a2a1	145	\r
4abe4f58	146	memcpy(tmp4, receivedAnswer, 4);\r
20f9a2a1 M	147	ntpp = prng_successor(nt, 32) ^ crypto1_word(pcs, 0,0);\r
	148	\r
	149	if (ntpp != bytes_to_num(tmp4, 4)) {\r
4abe4f58	150	Dbprintf("Authentication failed. Error card response.");\r
20f9a2a1 M	151	return 3;\r
	152	}\r
	153	\r
	154	return 0;\r
	155	}\r
	156	\r
	157	int mifare_classic_readblock(struct Crypto1State pcs, uint32_t uid, uint8_t blockNo, uint8_t blockData) \r
	158	{\r
	159	// variables\r
4abe4f58	160	int len; \r
20f9a2a1 M	161	uint8_t bt[2];\r
20f9a2a1 M	162	\r
4abe4f58	163	uint8_t* receivedAnswer = mifare_get_bigbufptr();\r
20f9a2a1	164	\r
4abe4f58	165	// command MIFARE_CLASSIC_READBLOCK\r
20f9a2a1 M	166	len = mifare_sendcmd_short(pcs, 1, 0x30, blockNo, receivedAnswer);\r
	167	if (len == 1) {\r
	168	Dbprintf("Cmd Error: %02x", receivedAnswer[0]); \r
	169	return 1;\r
	170	}\r
	171	if (len != 18) {\r
	172	Dbprintf("Cmd Error: card timeout. len: %x", len); \r
	173	return 2;\r
	174	}\r
	175	\r
	176	memcpy(bt, receivedAnswer + 16, 2);\r
4abe4f58	177	AppendCrc14443a(receivedAnswer, 16);\r
20f9a2a1 M	178	if (bt[0] != receivedAnswer[16] \|\| bt[1] != receivedAnswer[17]) {\r
	179	Dbprintf("Cmd CRC response error."); \r
	180	return 3;\r
	181	}\r
	182	\r
	183	memcpy(blockData, receivedAnswer, 16);\r
	184	return 0;\r
	185	}\r
	186	\r
	187	int mifare_classic_writeblock(struct Crypto1State pcs, uint32_t uid, uint8_t blockNo, uint8_t blockData) \r
	188	{\r
	189	// variables\r
4abe4f58	190	int len, i; \r
20f9a2a1	191	uint32_t pos;\r
4abe4f58 M	192	uint32_t par = 0;\r
4abe4f58 M	193	byte_t res;\r
20f9a2a1 M	194	\r
20f9a2a1 M	195	uint8_t d_block[18], d_block_enc[18];\r
4abe4f58	196	uint8_t* receivedAnswer = mifare_get_bigbufptr();\r
20f9a2a1	197	\r
4abe4f58	198	// command MIFARE_CLASSIC_WRITEBLOCK\r
20f9a2a1 M	199	len = mifare_sendcmd_short(pcs, 1, 0xA0, blockNo, receivedAnswer);\r
	200	\r
	201	if ((len != 1) \|\| (receivedAnswer[0] != 0x0A)) { // 0x0a - ACK\r
	202	Dbprintf("Cmd Error: %02x", receivedAnswer[0]); \r
	203	return 1;\r
	204	}\r
	205	\r
	206	memcpy(d_block, blockData, 16);\r
	207	AppendCrc14443a(d_block, 16);\r
	208	\r
	209	// crypto\r
	210	par = 0;\r
4abe4f58 M	211	for (pos = 0; pos < 18; pos++)\r
	212	{\r
	213	d_block_enc[pos] = crypto1_byte(pcs, 0x00, 0) ^ d_block[pos];\r
20f9a2a1	214	par = (par >> 1) \| ( ((filter(pcs->odd) ^ oddparity(d_block[pos])) & 0x01) * 0x20000 );\r
4abe4f58	215	} \r
20f9a2a1	216	\r
4abe4f58	217	ReaderTransmitPar(d_block_enc, sizeof(d_block_enc), par);\r
20f9a2a1	218	\r
4abe4f58	219	// Receive the response\r
20f9a2a1 M	220	len = ReaderReceive(receivedAnswer); \r
	221	\r
	222	res = 0;\r
	223	for (i = 0; i < 4; i++)\r
	224	res \|= (crypto1_bit(pcs, 0, 0) ^ BIT(receivedAnswer[0], i)) << i;\r
	225	\r
	226	if ((len != 1) \|\| (res != 0x0A)) {\r
	227	Dbprintf("Cmd send data2 Error: %02x", res); \r
	228	return 2;\r
	229	}\r
	230	\r
	231	return 0;\r
	232	}\r
	233	\r
	234	int mifare_classic_halt(struct Crypto1State *pcs, uint32_t uid) \r
	235	{\r
	236	// variables\r
4abe4f58	237	int len; \r
20f9a2a1 M	238	\r
20f9a2a1 M	239	// Mifare HALT\r
4abe4f58	240	uint8_t* receivedAnswer = mifare_get_bigbufptr();\r
20f9a2a1 M	241	\r
20f9a2a1 M	242	len = mifare_sendcmd_short(pcs, 1, 0x50, 0x00, receivedAnswer);\r
4abe4f58	243	if (len != 0) {\r
20f9a2a1 M	244	Dbprintf("halt error. response len: %x", len); \r
	245	return 1;\r
	246	}\r
	247	\r
	248	return 0;\r
	249	}\r