[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
	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
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
//	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)\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
		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
f89c7050 M	27	{\r
	28	return mifare_sendcmd_shortex(pcs, crypted, cmd, data, answer, NULL);\r
	29	}\r
	30	\r
	31	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	32	{\r
	33	uint8_t dcmd[4], ecmd[4];\r
	34	uint32_t pos, par, res;\r
	35	\r
	36	dcmd[0] = cmd;\r
	37	dcmd[1] = data;\r
	38	AppendCrc14443a(dcmd, 2);\r
	39	\r
	40	memcpy(ecmd, dcmd, sizeof(dcmd));\r
	41	\r
	42	if (crypted) {\r
	43	par = 0;\r
	44	for (pos = 0; pos < 4; pos++)\r
	45	{\r
	46	ecmd[pos] = crypto1_byte(pcs, 0x00, 0) ^ dcmd[pos];\r
	47	par = (par >> 1) \| ( ((filter(pcs->odd) ^ oddparity(dcmd[pos])) & 0x01) * 0x08 );\r
	48	} \r
	49	\r
	50	ReaderTransmitPar(ecmd, sizeof(ecmd), par);\r
	51	\r
	52	} else {\r
	53	ReaderTransmit(dcmd, sizeof(dcmd));\r
	54	}\r
	55	\r
f89c7050 M	56	int len = ReaderReceivePar(answer, &par);\r
	57	\r
	58	if (parptr) *parptr = par;\r
20f9a2a1	59	\r
4abe4f58	60	if (crypted == CRYPT_ALL) {\r
20f9a2a1 M	61	if (len == 1) {\r
	62	res = 0;\r
	63	for (pos = 0; pos < 4; pos++)\r
	64	res \|= (crypto1_bit(pcs, 0, 0) ^ BIT(answer[0], pos)) << pos;\r
	65	\r
	66	answer[0] = res;\r
	67	\r
	68	} else {\r
	69	for (pos = 0; pos < len; pos++)\r
	70	{\r
	71	answer[pos] = crypto1_byte(pcs, 0x00, 0) ^ answer[pos];\r
	72	}\r
	73	}\r
	74	}\r
	75	\r
	76	return len;\r
	77	}\r
	78	\r
	79	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	80	{\r
	81	return mifare_classic_authex(pcs, uid, blockNo, keyType, ui64Key, isNested, NULL);\r
	82	}\r
	83	\r
	84	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	85	{\r
20f9a2a1 M	86	// variables\r
4abe4f58	87	int len; \r
20f9a2a1 M	88	uint32_t pos;\r
20f9a2a1 M	89	uint8_t tmp4[4];\r
4abe4f58 M	90	byte_t par = 0;\r
4abe4f58 M	91	byte_t ar[4];\r
20f9a2a1 M	92	uint32_t nt, ntpp; // Supplied tag nonce\r
	93	\r
	94	uint8_t mf_nr_ar[] = { 0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00 };\r
4abe4f58	95	uint8_t* receivedAnswer = mifare_get_bigbufptr();\r
20f9a2a1	96	\r
4abe4f58	97	// Transmit MIFARE_CLASSIC_AUTH\r
20f9a2a1 M	98	len = mifare_sendcmd_short(pcs, isNested, 0x60 + (keyType & 0x01), blockNo, receivedAnswer);\r
20f9a2a1 M	99	// Dbprintf("rand nonce len: %x", len); \r
4abe4f58	100	if (len != 4) return 1;\r
20f9a2a1 M	101	\r
	102	ar[0] = 0x55;\r
	103	ar[1] = 0x41;\r
	104	ar[2] = 0x49;\r
	105	ar[3] = 0x92; \r
	106	\r
	107	// Save the tag nonce (nt)\r
	108	nt = bytes_to_num(receivedAnswer, 4);\r
20f9a2a1 M	109	\r
20f9a2a1 M	110	// ----------------------------- crypto1 create\r
4abe4f58 M	111	if (isNested)\r
	112	crypto1_destroy(pcs);\r
	113	\r
	114	// Init cipher with key\r
20f9a2a1 M	115	crypto1_create(pcs, ui64Key);\r
20f9a2a1 M	116	\r
4abe4f58 M	117	if (isNested == AUTH_NESTED) {\r
	118	// decrypt nt with help of new key \r
	119	nt = crypto1_word(pcs, nt ^ uid, 1) ^ nt;\r
	120	} else {\r
	121	// Load (plain) uid^nt into the cipher\r
	122	crypto1_word(pcs, nt ^ uid, 0);\r
	123	}\r
	124	\r
	125	// some statistic\r
f89c7050 M	126	if (!ntptr)\r
	127	Dbprintf("auth uid: %08x nt: %08x", uid, nt); \r
	128	\r
	129	// save Nt\r
	130	if (ntptr)\r
	131	*ntptr = nt;\r
20f9a2a1 M	132	\r
20f9a2a1 M	133	par = 0;\r
4abe4f58 M	134	// Generate (encrypted) nr+parity by loading it into the cipher (Nr)\r
	135	for (pos = 0; pos < 4; pos++)\r
	136	{\r
	137	mf_nr_ar[pos] = crypto1_byte(pcs, ar[pos], 0) ^ ar[pos];\r
20f9a2a1	138	par = (par >> 1) \| ( ((filter(pcs->odd) ^ oddparity(ar[pos])) & 0x01) * 0x80 );\r
4abe4f58	139	} \r
20f9a2a1	140	\r
4abe4f58 M	141	// Skip 32 bits in pseudo random generator\r
4abe4f58 M	142	nt = prng_successor(nt,32);\r
20f9a2a1 M	143	\r
20f9a2a1 M	144	// ar+parity\r
4abe4f58 M	145	for (pos = 4; pos < 8; pos++)\r
4abe4f58 M	146	{\r
20f9a2a1	147	nt = prng_successor(nt,8);\r
4abe4f58	148	mf_nr_ar[pos] = crypto1_byte(pcs,0x00,0) ^ (nt & 0xff);\r
20f9a2a1	149	par = (par >> 1)\| ( ((filter(pcs->odd) ^ oddparity(nt & 0xff)) & 0x01) * 0x80 );\r
4abe4f58	150	} \r
20f9a2a1	151	\r
4abe4f58 M	152	// Transmit reader nonce and reader answer\r
4abe4f58 M	153	ReaderTransmitPar(mf_nr_ar, sizeof(mf_nr_ar), par);\r
20f9a2a1	154	\r
4abe4f58	155	// Receive 4 bit answer\r
20f9a2a1	156	len = ReaderReceive(receivedAnswer);\r
4abe4f58 M	157	if (!len)\r
	158	{\r
	159	Dbprintf("Authentication failed. Card timeout.");\r
20f9a2a1	160	return 2;\r
4abe4f58	161	}\r
20f9a2a1	162	\r
4abe4f58	163	memcpy(tmp4, receivedAnswer, 4);\r
20f9a2a1 M	164	ntpp = prng_successor(nt, 32) ^ crypto1_word(pcs, 0,0);\r
	165	\r
	166	if (ntpp != bytes_to_num(tmp4, 4)) {\r
4abe4f58	167	Dbprintf("Authentication failed. Error card response.");\r
20f9a2a1 M	168	return 3;\r
	169	}\r
	170	\r
	171	return 0;\r
	172	}\r
	173	\r
	174	int mifare_classic_readblock(struct Crypto1State pcs, uint32_t uid, uint8_t blockNo, uint8_t blockData) \r
	175	{\r
	176	// variables\r
4abe4f58	177	int len; \r
20f9a2a1 M	178	uint8_t bt[2];\r
20f9a2a1 M	179	\r
4abe4f58	180	uint8_t* receivedAnswer = mifare_get_bigbufptr();\r
20f9a2a1	181	\r
4abe4f58	182	// command MIFARE_CLASSIC_READBLOCK\r
20f9a2a1 M	183	len = mifare_sendcmd_short(pcs, 1, 0x30, blockNo, receivedAnswer);\r
	184	if (len == 1) {\r
	185	Dbprintf("Cmd Error: %02x", receivedAnswer[0]); \r
	186	return 1;\r
	187	}\r
	188	if (len != 18) {\r
	189	Dbprintf("Cmd Error: card timeout. len: %x", len); \r
	190	return 2;\r
	191	}\r
	192	\r
	193	memcpy(bt, receivedAnswer + 16, 2);\r
4abe4f58	194	AppendCrc14443a(receivedAnswer, 16);\r
20f9a2a1 M	195	if (bt[0] != receivedAnswer[16] \|\| bt[1] != receivedAnswer[17]) {\r
	196	Dbprintf("Cmd CRC response error."); \r
	197	return 3;\r
	198	}\r
	199	\r
	200	memcpy(blockData, receivedAnswer, 16);\r
	201	return 0;\r
	202	}\r
	203	\r
	204	int mifare_classic_writeblock(struct Crypto1State pcs, uint32_t uid, uint8_t blockNo, uint8_t blockData) \r
	205	{\r
	206	// variables\r
4abe4f58	207	int len, i; \r
20f9a2a1	208	uint32_t pos;\r
4abe4f58 M	209	uint32_t par = 0;\r
4abe4f58 M	210	byte_t res;\r
20f9a2a1 M	211	\r
20f9a2a1 M	212	uint8_t d_block[18], d_block_enc[18];\r
4abe4f58	213	uint8_t* receivedAnswer = mifare_get_bigbufptr();\r
20f9a2a1	214	\r
4abe4f58	215	// command MIFARE_CLASSIC_WRITEBLOCK\r
20f9a2a1 M	216	len = mifare_sendcmd_short(pcs, 1, 0xA0, blockNo, receivedAnswer);\r
	217	\r
	218	if ((len != 1) \|\| (receivedAnswer[0] != 0x0A)) { // 0x0a - ACK\r
	219	Dbprintf("Cmd Error: %02x", receivedAnswer[0]); \r
	220	return 1;\r
	221	}\r
	222	\r
	223	memcpy(d_block, blockData, 16);\r
	224	AppendCrc14443a(d_block, 16);\r
	225	\r
	226	// crypto\r
	227	par = 0;\r
4abe4f58 M	228	for (pos = 0; pos < 18; pos++)\r
	229	{\r
	230	d_block_enc[pos] = crypto1_byte(pcs, 0x00, 0) ^ d_block[pos];\r
20f9a2a1	231	par = (par >> 1) \| ( ((filter(pcs->odd) ^ oddparity(d_block[pos])) & 0x01) * 0x20000 );\r
4abe4f58	232	} \r
20f9a2a1	233	\r
4abe4f58	234	ReaderTransmitPar(d_block_enc, sizeof(d_block_enc), par);\r
20f9a2a1	235	\r
4abe4f58	236	// Receive the response\r
20f9a2a1 M	237	len = ReaderReceive(receivedAnswer); \r
	238	\r
	239	res = 0;\r
	240	for (i = 0; i < 4; i++)\r
	241	res \|= (crypto1_bit(pcs, 0, 0) ^ BIT(receivedAnswer[0], i)) << i;\r
	242	\r
	243	if ((len != 1) \|\| (res != 0x0A)) {\r
	244	Dbprintf("Cmd send data2 Error: %02x", res); \r
	245	return 2;\r
	246	}\r
	247	\r
	248	return 0;\r
	249	}\r
	250	\r
	251	int mifare_classic_halt(struct Crypto1State *pcs, uint32_t uid) \r
	252	{\r
	253	// variables\r
4abe4f58	254	int len; \r
20f9a2a1 M	255	\r
20f9a2a1 M	256	// Mifare HALT\r
4abe4f58	257	uint8_t* receivedAnswer = mifare_get_bigbufptr();\r
20f9a2a1 M	258	\r
20f9a2a1 M	259	len = mifare_sendcmd_short(pcs, 1, 0x50, 0x00, receivedAnswer);\r
4abe4f58	260	if (len != 0) {\r
20f9a2a1 M	261	Dbprintf("halt error. response len: %x", len); \r
	262	return 1;\r
	263	}\r
	264	\r
	265	return 0;\r
	266	}\r