[proxmark3-svn] / client / cmdhflist.c

//-----------------------------------------------------------------------------
// Copyright (C) Merlok - 2017
//
// 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.
//-----------------------------------------------------------------------------
// Command: hf mf list. It shows data from arm buffer.
//-----------------------------------------------------------------------------

#include "cmdhflist.h"

#include <stdlib.h>
#include <stdio.h>
#include <string.h>
#include <stdint.h>
#include <stdbool.h>
#include "util.h"
#include "data.h"
#include "ui.h"
#include "iso14443crc.h"
#include "parity.h"
#include "protocols.h"
#include "crapto1/crapto1.h"
#include "mifarehost.h"
#include "mifaredefault.h"


enum MifareAuthSeq {
	masNone,
	masNt,
	masNrAr,
	masAt,
	masAuthComplete,
	masFirstData,
	masData,
	masError,
};
static enum MifareAuthSeq MifareAuthState;
static TAuthData AuthData;

void ClearAuthData() {
	AuthData.uid = 0;
	AuthData.nt = 0;
	AuthData.first_auth = true;
	AuthData.ks2 = 0;
	AuthData.ks3 = 0;
}

/**
 * @brief iso14443A_CRC_check Checks CRC in command or response
 * @param isResponse
 * @param data
 * @param len
 * @return  0 : CRC-command, CRC not ok
 *          1 : CRC-command, CRC ok
 *          2 : Not crc-command
 */
uint8_t iso14443A_CRC_check(bool isResponse, uint8_t* data, uint8_t len)
{
	uint8_t b1,b2;

	if(len <= 2) return 2;

	if(isResponse & (len < 6)) return 2;
	
	ComputeCrc14443(CRC_14443_A, data, len-2, &b1, &b2);
	if (b1 != data[len-2] || b2 != data[len-1]) {
		return 0;
	} else {
		return 1;
	}
}

uint8_t mifare_CRC_check(bool isResponse, uint8_t* data, uint8_t len)
{
	switch(MifareAuthState) {
		case masNone:
		case masError:
			return iso14443A_CRC_check(isResponse, data, len);
		default:
			return 2;
	}
}

void annotateIso14443a(char *exp, size_t size, uint8_t* cmd, uint8_t cmdsize)
{
	switch(cmd[0])
	{
	case ISO14443A_CMD_WUPA:        
		snprintf(exp,size,"WUPA"); 
		MifareAuthState = masNone;
		break;
	case ISO14443A_CMD_ANTICOLL_OR_SELECT:{
		// 93 20 = Anticollision (usage: 9320 - answer: 4bytes UID+1byte UID-bytes-xor)
		// 93 70 = Select (usage: 9370+5bytes 9320 answer - answer: 1byte SAK)
		if(cmd[1] == 0x70)
		{
			snprintf(exp,size,"SELECT_UID"); break;
		}else
		{
			snprintf(exp,size,"ANTICOLL"); break;
		}
	}
	case ISO14443A_CMD_ANTICOLL_OR_SELECT_2:{
		//95 20 = Anticollision of cascade level2
		//95 70 = Select of cascade level2
		if(cmd[2] == 0x70)
		{
			snprintf(exp,size,"SELECT_UID-2"); break;
		}else
		{
			snprintf(exp,size,"ANTICOLL-2"); break;
		}
	}
	case ISO14443A_CMD_REQA:		
		snprintf(exp,size,"REQA"); 
		MifareAuthState = masNone;
		break;
	case ISO14443A_CMD_READBLOCK:	snprintf(exp,size,"READBLOCK(%d)",cmd[1]); break;
	case ISO14443A_CMD_WRITEBLOCK:	snprintf(exp,size,"WRITEBLOCK(%d)",cmd[1]); break;
	case ISO14443A_CMD_HALT:		
		snprintf(exp,size,"HALT"); 
		MifareAuthState = masNone;
		break;
	case ISO14443A_CMD_RATS:		snprintf(exp,size,"RATS"); break;
	case MIFARE_CMD_INC:			snprintf(exp,size,"INC(%d)",cmd[1]); break;
	case MIFARE_CMD_DEC:			snprintf(exp,size,"DEC(%d)",cmd[1]); break;
	case MIFARE_CMD_RESTORE:		snprintf(exp,size,"RESTORE(%d)",cmd[1]); break;
	case MIFARE_CMD_TRANSFER:		snprintf(exp,size,"TRANSFER(%d)",cmd[1]); break;
	case MIFARE_AUTH_KEYA:
		if ( cmdsize > 3) {
			snprintf(exp,size,"AUTH-A(%d)",cmd[1]); 
			MifareAuthState = masNt;
		} else {
			//	case MIFARE_ULEV1_VERSION :  both 0x60.
			snprintf(exp,size,"EV1 VERSION");
		}
		break;
	case MIFARE_AUTH_KEYB:
		MifareAuthState = masNt;
		snprintf(exp,size,"AUTH-B(%d)",cmd[1]); 
		break;
	case MIFARE_MAGICWUPC1:			snprintf(exp,size,"MAGIC WUPC1"); break;
	case MIFARE_MAGICWUPC2:			snprintf(exp,size,"MAGIC WUPC2"); break;
	case MIFARE_MAGICWIPEC:			snprintf(exp,size,"MAGIC WIPEC"); break;
	case MIFARE_ULC_AUTH_1:		snprintf(exp,size,"AUTH "); break;
	case MIFARE_ULC_AUTH_2:		snprintf(exp,size,"AUTH_ANSW"); break;
	case MIFARE_ULEV1_AUTH:
		if ( cmdsize == 7 )
			snprintf(exp,size,"PWD-AUTH KEY: 0x%02x%02x%02x%02x", cmd[1], cmd[2], cmd[3], cmd[4] );
		else
			snprintf(exp,size,"PWD-AUTH");
		break;
	case MIFARE_ULEV1_FASTREAD:{
		if ( cmdsize >=3 && cmd[2] <= 0xE6)
			snprintf(exp,size,"READ RANGE (%d-%d)",cmd[1],cmd[2]); 
		else
			snprintf(exp,size,"?");
		break;
	}
	case MIFARE_ULC_WRITE:{
		if ( cmd[1] < 0x21 )
			snprintf(exp,size,"WRITEBLOCK(%d)",cmd[1]); 
		else
			snprintf(exp,size,"?");
		break;
	}
	case MIFARE_ULEV1_READ_CNT:{
		if ( cmd[1] < 5 )
			snprintf(exp,size,"READ CNT(%d)",cmd[1]);
		else
			snprintf(exp,size,"?");
		break;
	}
	case MIFARE_ULEV1_INCR_CNT:{
		if ( cmd[1] < 5 )
			snprintf(exp,size,"INCR(%d)",cmd[1]);
		else
			snprintf(exp,size,"?");
		break;
	}
	case MIFARE_ULEV1_READSIG:		snprintf(exp,size,"READ_SIG"); break;
	case MIFARE_ULEV1_CHECKTEAR:	snprintf(exp,size,"CHK_TEARING(%d)",cmd[1]); break;
	case MIFARE_ULEV1_VCSL:		snprintf(exp,size,"VCSL"); break;
	default:						snprintf(exp,size,"?"); break;
	}
	return;
}

void annotateMifare(char *exp, size_t size, uint8_t* cmd, uint8_t cmdsize, uint8_t* parity, uint8_t paritysize, bool isResponse) {
	// get UID
	if (MifareAuthState == masNone) {
		if (cmdsize == 9 && cmd[0] == ISO14443A_CMD_ANTICOLL_OR_SELECT && cmd[1] == 0x70) {
			ClearAuthData();
			AuthData.uid = bytes_to_num(&cmd[2], 4);
		}
		if (cmdsize == 9 && cmd[0] == ISO14443A_CMD_ANTICOLL_OR_SELECT_2 && cmd[1] == 0x70) {
			ClearAuthData();
			AuthData.uid = bytes_to_num(&cmd[2], 4);
		}
	}
	
	switch(MifareAuthState) {
		case masNt:
			if (cmdsize == 4 && isResponse) {
				snprintf(exp,size,"AUTH: nt %s", (AuthData.first_auth) ? "" : "(enc)");
				MifareAuthState = masNrAr;
				if (AuthData.first_auth)
					AuthData.nt = bytes_to_num(cmd, 4);
				else
					AuthData.nt_enc = bytes_to_num(cmd, 4);
					AuthData.nt_enc_par = parity[0];
				return;
			} else {
				MifareAuthState = masError;
			}
			break;
		case masNrAr:
			if (cmdsize == 8 && !isResponse) {
				snprintf(exp,size,"AUTH: nr ar (enc)");
				MifareAuthState = masAt;
				AuthData.nr_enc = bytes_to_num(cmd, 4);
				AuthData.ar_enc = bytes_to_num(&cmd[4], 4);
				AuthData.ar_enc_par = parity[0] << 4;
				return;
			} else {
				MifareAuthState = masError;
			}
			break;
		case masAt:
			if (cmdsize == 4 && isResponse) {
				snprintf(exp,size,"AUTH: at (enc)");
				MifareAuthState = masAuthComplete;
				AuthData.at_enc = bytes_to_num(cmd, 4);
				AuthData.at_enc_par = parity[0];
				return;
			} else {
				MifareAuthState = masError;
			}
			break;
		default:
			break;
	}
	
	if (!isResponse && ((MifareAuthState == masNone) || (MifareAuthState == masError)))
		annotateIso14443a(exp, size, cmd, cmdsize);
	
}

bool DecodeMifareData(uint8_t *cmd, uint8_t cmdsize, bool isResponse, uint8_t *mfData, size_t *mfDataLen) {
	static struct Crypto1State *traceCrypto1;	
	static uint64_t mfLastKey;
	
	*mfDataLen = 0;
	
	if (MifareAuthState == masAuthComplete) {
		if (traceCrypto1) {
			crypto1_destroy(traceCrypto1);
		}

		MifareAuthState = masFirstData;
		return false;
	}
	
	if (cmdsize > 32)
		return false;
	
	if (MifareAuthState == masFirstData) {
		if (AuthData.first_auth) {
			AuthData.ks2 = AuthData.ar_enc ^ prng_successor(AuthData.nt, 64);
			AuthData.ks3 = AuthData.at_enc ^ prng_successor(AuthData.nt, 96);
			struct Crypto1State *revstate = lfsr_recovery64(AuthData.ks2, AuthData.ks3);
			lfsr_rollback_word(revstate, 0, 0);
			lfsr_rollback_word(revstate, 0, 0);
			lfsr_rollback_word(revstate, AuthData.nr_enc, 1);
			lfsr_rollback_word(revstate, AuthData.uid ^ AuthData.nt, 0);

			uint64_t lfsr = 0;
			crypto1_get_lfsr(revstate, &lfsr);
			crypto1_destroy(revstate);
			mfLastKey = lfsr;
			PrintAndLog("            |          * | key | probable key:%x%x Prng:%s   ks2:%08x ks3:%08x |     |", 
				(unsigned int)((lfsr & 0xFFFFFFFF00000000) >> 32), (unsigned int)(lfsr & 0xFFFFFFFF), 
				validate_prng_nonce(AuthData.nt) ? "WEAK": "HARD",
				AuthData.ks2,
				AuthData.ks3);
			
			AuthData.first_auth = false;

			traceCrypto1 = lfsr_recovery64(AuthData.ks2, AuthData.ks3);
		} else {
			printf("uid:%x nt:%x ar_enc:%x at_enc:%x\n", AuthData.uid, AuthData.nt, AuthData.ar_enc, AuthData.at_enc);
			
			// check last used key
			if (mfLastKey) {
				if (NestedCheckKey(mfLastKey, &AuthData, cmd, cmdsize)) {
				};
			}
			
			// check default keys
			if (!traceCrypto1) {
				for (int defaultKeyCounter = 0; defaultKeyCounter < MifareDefaultKeysSize; defaultKeyCounter++){
					if (NestedCheckKey(MifareDefaultKeys[defaultKeyCounter], &AuthData, cmd, cmdsize)) {
						
						break;
					};
				}
			}
			
			// nested
			if (!traceCrypto1 && validate_prng_nonce(AuthData.nt)) {
				uint32_t ntx = prng_successor(AuthData.nt, 90);
				for (int i = 0; i < 16383; i++) {
					ntx = prng_successor(ntx, 1);
					if (NTParityChk(&AuthData, ntx)){

						uint32_t ks2 = AuthData.ar_enc ^ prng_successor(ntx, 64);
						uint32_t ks3 = AuthData.at_enc ^ prng_successor(ntx, 96);
						struct Crypto1State *pcs = lfsr_recovery64(ks2, ks3);
						memcpy(mfData, cmd, cmdsize);
						mf_crypto1_decrypt(pcs, mfData, cmdsize, 0);
				
						crypto1_destroy(pcs);
						if (CheckCrc14443(CRC_14443_A, mfData, cmdsize)) {
							AuthData.ks2 = ks2;
							AuthData.ks3 = ks3;
							traceCrypto1 = lfsr_recovery64(AuthData.ks2, AuthData.ks3);
							break;
						}
					}						
				}
				if (traceCrypto1)
					printf("key> nt=%08x nonce distance=%d \n", ntx, nonce_distance(AuthData.nt, ntx));
				else
					printf("key> don't have any valid nt( \n");					
			}
			
			//hardnested
			if (!traceCrypto1) {
			}
		}
		
		
		MifareAuthState = masData;
	}
	
	if (MifareAuthState == masData && traceCrypto1) {
		memcpy(mfData, cmd, cmdsize);
		mf_crypto1_decrypt(traceCrypto1, mfData, cmdsize, 0);
		*mfDataLen = cmdsize;
	}
	
	return *mfDataLen > 0;
}

bool NTParityChk(TAuthData *ad, uint32_t ntx) {
	if (
		(oddparity8(ntx >> 8 & 0xff) ^ (ntx & 0x01) ^ ((ad->nt_enc_par >> 5) & 0x01) ^ (ad->nt_enc & 0x01)) ||
		(oddparity8(ntx >> 16 & 0xff) ^ (ntx >> 8 & 0x01) ^ ((ad->nt_enc_par >> 6) & 0x01) ^ (ad->nt_enc >> 8 & 0x01)) ||
		(oddparity8(ntx >> 24 & 0xff) ^ (ntx >> 16 & 0x01) ^ ((ad->nt_enc_par >> 7) & 0x01) ^ (ad->nt_enc >> 16 & 0x01))
		)
		return false;
	
	uint32_t ar = prng_successor(ntx, 64);
	if (
		(oddparity8(ar >> 8 & 0xff) ^ (ar & 0x01) ^ ((ad->ar_enc_par >> 5) & 0x01) ^ (ad->ar_enc & 0x01)) ||
		(oddparity8(ar >> 16 & 0xff) ^ (ar >> 8 & 0x01) ^ ((ad->ar_enc_par >> 6) & 0x01) ^ (ad->ar_enc >> 8 & 0x01)) ||
		(oddparity8(ar >> 24 & 0xff) ^ (ar >> 16 & 0x01) ^ ((ad->ar_enc_par >> 7) & 0x01) ^ (ad->ar_enc >> 16 & 0x01))
		)
		return false;

	uint32_t at = prng_successor(ntx, 96);
	if (
		(oddparity8(ar & 0xff) ^ (at >> 24 & 0x01) ^ ((ad->ar_enc_par >> 4) & 0x01) ^ (ad->at_enc >> 24 & 0x01)) ||
		(oddparity8(at >> 8 & 0xff) ^ (at & 0x01) ^ ((ad->at_enc_par >> 5) & 0x01) ^ (ad->at_enc & 0x01)) ||
		(oddparity8(at >> 16 & 0xff) ^ (at >> 8 & 0x01) ^ ((ad->at_enc_par >> 6) & 0x01) ^ (ad->at_enc >> 8 & 0x01)) ||
		(oddparity8(at >> 24 & 0xff) ^ (at >> 16 & 0x01) ^ ((ad->at_enc_par >> 7) & 0x01) ^ (ad->at_enc >> 16 & 0x01))
		)
		return false;
		
	return true;
}

bool NestedCheckKey(uint64_t key, TAuthData *ad, uint8_t *cmd, uint8_t cmdsize) {
	uint8_t buf[32] = {0};
	struct Crypto1State *pcs;
	
	pcs = crypto1_create(key);
	uint32_t nt1 = crypto1_word(pcs, ad->nt_enc ^ ad->uid, 1) ^ ad->nt_enc;
	uint32_t ar = prng_successor(nt1, 64);
	uint32_t at = prng_successor(nt1, 96);
	printf("key> nested auth uid: %08x nt: %08x nt_parity: %s ar: %08x at: %08x\n", ad->uid, nt1, printBitsPar(&ad->nt_enc_par, 4), ar, at);
	uint32_t nr1 = crypto1_word(pcs, ad->nr_enc, 1) ^ ad->nr_enc;
	uint32_t ar1 = crypto1_word(pcs, 0, 0) ^ ad->ar_enc;
	uint32_t at1 = crypto1_word(pcs, 0, 0) ^ ad->at_enc;
	printf("key> the same key test. nr1: %08x ar1: %08x at1: %08x \n", nr1, ar1, at1);

	if (NTParityChk(ad, nt1))
		printf("key> the same key test OK. key=%x%x\n", (unsigned int)((key & 0xFFFFFFFF00000000) >> 32), (unsigned int)(key & 0xFFFFFFFF));
	else {
		printf("key> the same key test. check nt parity error.\n");
		return false;
	}

	memcpy(buf, cmd, cmdsize);
	mf_crypto1_decrypt(pcs, buf, cmdsize, 0);
	
	crypto1_destroy(pcs);
	
	return CheckCrc14443(CRC_14443_A, buf, cmdsize);
}
Commit	Line	Data
4f131b53	1	//-----------------------------------------------------------------------------
	2	// Copyright (C) Merlok - 2017
	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	// Command: hf mf list. It shows data from arm buffer.
	9	//-----------------------------------------------------------------------------
	10
	11	#include "cmdhflist.h"
	12
	13	#include <stdlib.h>
	14	#include <stdio.h>
	15	#include <string.h>
6612a5a2	16	#include <stdint.h>
	17	#include <stdbool.h>
	18	#include "util.h"
	19	#include "data.h"
	20	#include "ui.h"
	21	#include "iso14443crc.h"
	22	#include "parity.h"
	23	#include "protocols.h"
7b215d14 OM	24	#include "crapto1/crapto1.h"
7b215d14 OM	25	#include "mifarehost.h"
c6a886fb	26	#include "mifaredefault.h"
4f131b53	27
4f131b53	28
6612a5a2	29	enum MifareAuthSeq {
	30	masNone,
	31	masNt,
	32	masNrAr,
	33	masAt,
747885a6	34	masAuthComplete,
aadc6bf1	35	masFirstData,
6612a5a2	36	masData,
6612a5a2	37	masError,
	38	};
	39	static enum MifareAuthSeq MifareAuthState;
aadc6bf1 OM	40	static TAuthData AuthData;
	41
	42	void ClearAuthData() {
	43	AuthData.uid = 0;
	44	AuthData.nt = 0;
7b215d14	45	AuthData.first_auth = true;
e01bc794 OM	46	AuthData.ks2 = 0;
e01bc794 OM	47	AuthData.ks3 = 0;
aadc6bf1	48	}
6612a5a2	49
	50	/**
	51	* @brief iso14443A_CRC_check Checks CRC in command or response
	52	* @param isResponse
	53	* @param data
	54	* @param len
	55	* @return 0 : CRC-command, CRC not ok
	56	* 1 : CRC-command, CRC ok
	57	* 2 : Not crc-command
	58	*/
	59	uint8_t iso14443A_CRC_check(bool isResponse, uint8_t* data, uint8_t len)
	60	{
	61	uint8_t b1,b2;
	62
	63	if(len <= 2) return 2;
	64
	65	if(isResponse & (len < 6)) return 2;
	66
	67	ComputeCrc14443(CRC_14443_A, data, len-2, &b1, &b2);
	68	if (b1 != data[len-2] \|\| b2 != data[len-1]) {
	69	return 0;
	70	} else {
	71	return 1;
	72	}
	73	}
	74
	75	uint8_t mifare_CRC_check(bool isResponse, uint8_t* data, uint8_t len)
	76	{
	77	switch(MifareAuthState) {
	78	case masNone:
6612a5a2	79	case masError:
	80	return iso14443A_CRC_check(isResponse, data, len);
	81	default:
	82	return 2;
	83	}
6612a5a2	84	}
	85
	86	void annotateIso14443a(char exp, size_t size, uint8_t cmd, uint8_t cmdsize)
	87	{
	88	switch(cmd[0])
	89	{
a31f7f89 OM	90	case ISO14443A_CMD_WUPA:
	91	snprintf(exp,size,"WUPA");
	92	MifareAuthState = masNone;
	93	break;
6612a5a2	94	case ISO14443A_CMD_ANTICOLL_OR_SELECT:{
	95	// 93 20 = Anticollision (usage: 9320 - answer: 4bytes UID+1byte UID-bytes-xor)
	96	// 93 70 = Select (usage: 9370+5bytes 9320 answer - answer: 1byte SAK)
	97	if(cmd[1] == 0x70)
	98	{
	99	snprintf(exp,size,"SELECT_UID"); break;
	100	}else
	101	{
	102	snprintf(exp,size,"ANTICOLL"); break;
	103	}
	104	}
	105	case ISO14443A_CMD_ANTICOLL_OR_SELECT_2:{
	106	//95 20 = Anticollision of cascade level2
	107	//95 70 = Select of cascade level2
	108	if(cmd[2] == 0x70)
	109	{
	110	snprintf(exp,size,"SELECT_UID-2"); break;
	111	}else
	112	{
	113	snprintf(exp,size,"ANTICOLL-2"); break;
	114	}
	115	}
a31f7f89 OM	116	case ISO14443A_CMD_REQA:
	117	snprintf(exp,size,"REQA");
	118	MifareAuthState = masNone;
	119	break;
6612a5a2	120	case ISO14443A_CMD_READBLOCK: snprintf(exp,size,"READBLOCK(%d)",cmd[1]); break;
	121	case ISO14443A_CMD_WRITEBLOCK: snprintf(exp,size,"WRITEBLOCK(%d)",cmd[1]); break;
	122	case ISO14443A_CMD_HALT:
	123	snprintf(exp,size,"HALT");
	124	MifareAuthState = masNone;
	125	break;
	126	case ISO14443A_CMD_RATS: snprintf(exp,size,"RATS"); break;
	127	case MIFARE_CMD_INC: snprintf(exp,size,"INC(%d)",cmd[1]); break;
	128	case MIFARE_CMD_DEC: snprintf(exp,size,"DEC(%d)",cmd[1]); break;
	129	case MIFARE_CMD_RESTORE: snprintf(exp,size,"RESTORE(%d)",cmd[1]); break;
	130	case MIFARE_CMD_TRANSFER: snprintf(exp,size,"TRANSFER(%d)",cmd[1]); break;
	131	case MIFARE_AUTH_KEYA:
	132	if ( cmdsize > 3) {
	133	snprintf(exp,size,"AUTH-A(%d)",cmd[1]);
	134	MifareAuthState = masNt;
	135	} else {
	136	// case MIFARE_ULEV1_VERSION : both 0x60.
	137	snprintf(exp,size,"EV1 VERSION");
	138	}
	139	break;
	140	case MIFARE_AUTH_KEYB:
	141	MifareAuthState = masNt;
	142	snprintf(exp,size,"AUTH-B(%d)",cmd[1]);
	143	break;
	144	case MIFARE_MAGICWUPC1: snprintf(exp,size,"MAGIC WUPC1"); break;
	145	case MIFARE_MAGICWUPC2: snprintf(exp,size,"MAGIC WUPC2"); break;
	146	case MIFARE_MAGICWIPEC: snprintf(exp,size,"MAGIC WIPEC"); break;
	147	case MIFARE_ULC_AUTH_1: snprintf(exp,size,"AUTH "); break;
	148	case MIFARE_ULC_AUTH_2: snprintf(exp,size,"AUTH_ANSW"); break;
	149	case MIFARE_ULEV1_AUTH:
	150	if ( cmdsize == 7 )
	151	snprintf(exp,size,"PWD-AUTH KEY: 0x%02x%02x%02x%02x", cmd[1], cmd[2], cmd[3], cmd[4] );
	152	else
	153	snprintf(exp,size,"PWD-AUTH");
	154	break;
	155	case MIFARE_ULEV1_FASTREAD:{
	156	if ( cmdsize >=3 && cmd[2] <= 0xE6)
	157	snprintf(exp,size,"READ RANGE (%d-%d)",cmd[1],cmd[2]);
	158	else
	159	snprintf(exp,size,"?");
	160	break;
	161	}
	162	case MIFARE_ULC_WRITE:{
	163	if ( cmd[1] < 0x21 )
	164	snprintf(exp,size,"WRITEBLOCK(%d)",cmd[1]);
	165	else
	166	snprintf(exp,size,"?");
	167	break;
	168	}
	169	case MIFARE_ULEV1_READ_CNT:{
	170	if ( cmd[1] < 5 )
	171	snprintf(exp,size,"READ CNT(%d)",cmd[1]);
	172	else
	173	snprintf(exp,size,"?");
	174	break;
	175	}
	176	case MIFARE_ULEV1_INCR_CNT:{
	177	if ( cmd[1] < 5 )
	178	snprintf(exp,size,"INCR(%d)",cmd[1]);
	179	else
	180	snprintf(exp,size,"?");
	181	break;
	182	}
	183	case MIFARE_ULEV1_READSIG: snprintf(exp,size,"READ_SIG"); break;
184	case MIFARE_ULEV1_CHECKTEAR: snprintf(exp,size,"CHK_TEARING(%d)",cmd[1]); break;
185	case MIFARE_ULEV1_VCSL: snprintf(exp,size,"VCSL"); break;
186	default: snprintf(exp,size,"?"); break;
187	}
188	return;
189	}
190
b957bcd3	191	void annotateMifare(char exp, size_t size, uint8_t cmd, uint8_t cmdsize, uint8_t* parity, uint8_t paritysize, bool isResponse) {
aadc6bf1 OM	192	// get UID
aadc6bf1 OM	193	if (MifareAuthState == masNone) {
7b215d14	194	if (cmdsize == 9 && cmd[0] == ISO14443A_CMD_ANTICOLL_OR_SELECT && cmd[1] == 0x70) {
aadc6bf1 OM	195	ClearAuthData();
	196	AuthData.uid = bytes_to_num(&cmd[2], 4);
	197	}
7b215d14	198	if (cmdsize == 9 && cmd[0] == ISO14443A_CMD_ANTICOLL_OR_SELECT_2 && cmd[1] == 0x70) {
aadc6bf1 OM	199	ClearAuthData();
	200	AuthData.uid = bytes_to_num(&cmd[2], 4);
	201	}
	202	}
	203
6612a5a2	204	switch(MifareAuthState) {
6612a5a2	205	case masNt:
fb30f5a1	206	if (cmdsize == 4 && isResponse) {
aadc6bf1	207	snprintf(exp,size,"AUTH: nt %s", (AuthData.first_auth) ? "" : "(enc)");
6612a5a2	208	MifareAuthState = masNrAr;
aadc6bf1	209	if (AuthData.first_auth)
7b215d14	210	AuthData.nt = bytes_to_num(cmd, 4);
aadc6bf1	211	else
7b215d14	212	AuthData.nt_enc = bytes_to_num(cmd, 4);
b957bcd3	213	AuthData.nt_enc_par = parity[0];
6612a5a2	214	return;
	215	} else {
	216	MifareAuthState = masError;
6612a5a2	217	}
	218	break;
	219	case masNrAr:
fb30f5a1	220	if (cmdsize == 8 && !isResponse) {
6c30a244	221	snprintf(exp,size,"AUTH: nr ar (enc)");
6612a5a2	222	MifareAuthState = masAt;
7b215d14 OM	223	AuthData.nr_enc = bytes_to_num(cmd, 4);
7b215d14 OM	224	AuthData.ar_enc = bytes_to_num(&cmd[4], 4);
b957bcd3	225	AuthData.ar_enc_par = parity[0] << 4;
6612a5a2	226	return;
	227	} else {
	228	MifareAuthState = masError;
	229	}
	230	break;
	231	case masAt:
fb30f5a1	232	if (cmdsize == 4 && isResponse) {
6c30a244	233	snprintf(exp,size,"AUTH: at (enc)");
747885a6	234	MifareAuthState = masAuthComplete;
7b215d14	235	AuthData.at_enc = bytes_to_num(cmd, 4);
b957bcd3	236	AuthData.at_enc_par = parity[0];
6612a5a2	237	return;
	238	} else {
	239	MifareAuthState = masError;
	240	}
	241	break;
	242	default:
	243	break;
	244	}
	245
747885a6	246	if (!isResponse && ((MifareAuthState == masNone) \|\| (MifareAuthState == masError)))
6612a5a2	247	annotateIso14443a(exp, size, cmd, cmdsize);
	248
	249	}
7b215d14 OM	250
7b215d14 OM	251	bool DecodeMifareData(uint8_t cmd, uint8_t cmdsize, bool isResponse, uint8_t mfData, size_t *mfDataLen) {
747885a6	252	static struct Crypto1State *traceCrypto1;
dca8220f	253	static uint64_t mfLastKey;
747885a6	254
7b215d14 OM	255	*mfDataLen = 0;
7b215d14 OM	256
747885a6 OM	257	if (MifareAuthState == masAuthComplete) {
	258	if (traceCrypto1) {
	259	crypto1_destroy(traceCrypto1);
	260	}
	261
	262	MifareAuthState = masFirstData;
	263	return false;
	264	}
	265
7b215d14 OM	266	if (cmdsize > 32)
	267	return false;
	268
	269	if (MifareAuthState == masFirstData) {
	270	if (AuthData.first_auth) {
e01bc794 OM	271	AuthData.ks2 = AuthData.ar_enc ^ prng_successor(AuthData.nt, 64);
	272	AuthData.ks3 = AuthData.at_enc ^ prng_successor(AuthData.nt, 96);
	273	struct Crypto1State *revstate = lfsr_recovery64(AuthData.ks2, AuthData.ks3);
7b215d14 OM	274	lfsr_rollback_word(revstate, 0, 0);
	275	lfsr_rollback_word(revstate, 0, 0);
	276	lfsr_rollback_word(revstate, AuthData.nr_enc, 1);
	277	lfsr_rollback_word(revstate, AuthData.uid ^ AuthData.nt, 0);
	278
	279	uint64_t lfsr = 0;
	280	crypto1_get_lfsr(revstate, &lfsr);
	281	crypto1_destroy(revstate);
747885a6	282	mfLastKey = lfsr;
28ee794f	283	PrintAndLog(" \| * \| key \| probable key:%x%x Prng:%s ks2:%08x ks3:%08x \| \|",
7b215d14	284	(unsigned int)((lfsr & 0xFFFFFFFF00000000) >> 32), (unsigned int)(lfsr & 0xFFFFFFFF),
28ee794f	285	validate_prng_nonce(AuthData.nt) ? "WEAK": "HARD",
e01bc794 OM	286	AuthData.ks2,
e01bc794 OM	287	AuthData.ks3);
7b215d14 OM	288
7b215d14 OM	289	AuthData.first_auth = false;
747885a6	290
e01bc794	291	traceCrypto1 = lfsr_recovery64(AuthData.ks2, AuthData.ks3);
7b215d14	292	} else {
28ee794f	293	printf("uid:%x nt:%x ar_enc:%x at_enc:%x\n", AuthData.uid, AuthData.nt, AuthData.ar_enc, AuthData.at_enc);
747885a6 OM	294
	295	// check last used key
	296	if (mfLastKey) {
c6a886fb OM	297	if (NestedCheckKey(mfLastKey, &AuthData, cmd, cmdsize)) {
c6a886fb OM	298	};
747885a6 OM	299	}
	300
	301	// check default keys
7bea1581 OM	302	if (!traceCrypto1) {
	303	for (int defaultKeyCounter = 0; defaultKeyCounter < MifareDefaultKeysSize; defaultKeyCounter++){
	304	if (NestedCheckKey(MifareDefaultKeys[defaultKeyCounter], &AuthData, cmd, cmdsize)) {
	305
	306	break;
	307	};
	308	}
c6a886fb	309	}
747885a6 OM	310
747885a6 OM	311	// nested
7bea1581 OM	312	if (!traceCrypto1 && validate_prng_nonce(AuthData.nt)) {
	313	uint32_t ntx = prng_successor(AuthData.nt, 90);
	314	for (int i = 0; i < 16383; i++) {
	315	ntx = prng_successor(ntx, 1);
	316	if (NTParityChk(&AuthData, ntx)){
	317
	318	uint32_t ks2 = AuthData.ar_enc ^ prng_successor(ntx, 64);
	319	uint32_t ks3 = AuthData.at_enc ^ prng_successor(ntx, 96);
	320	struct Crypto1State *pcs = lfsr_recovery64(ks2, ks3);
	321	memcpy(mfData, cmd, cmdsize);
	322	mf_crypto1_decrypt(pcs, mfData, cmdsize, 0);
	323
	324	crypto1_destroy(pcs);
	325	if (CheckCrc14443(CRC_14443_A, mfData, cmdsize)) {
e01bc794 OM	326	AuthData.ks2 = ks2;
	327	AuthData.ks3 = ks3;
	328	traceCrypto1 = lfsr_recovery64(AuthData.ks2, AuthData.ks3);
7bea1581 OM	329	break;
	330	}
	331	}
	332	}
	333	if (traceCrypto1)
	334	printf("key> nt=%08x nonce distance=%d \n", ntx, nonce_distance(AuthData.nt, ntx));
	335	else
	336	printf("key> don't have any valid nt( \n");
747885a6 OM	337	}
	338
	339	//hardnested
7bea1581 OM	340	if (!traceCrypto1) {
7bea1581 OM	341	}
7b215d14 OM	342	}
	343
	344
	345
	346	MifareAuthState = masData;
7b215d14 OM	347	}
7b215d14 OM	348
747885a6 OM	349	if (MifareAuthState == masData && traceCrypto1) {
	350	memcpy(mfData, cmd, cmdsize);
	351	mf_crypto1_decrypt(traceCrypto1, mfData, cmdsize, 0);
	352	*mfDataLen = cmdsize;
7b215d14 OM	353	}
	354
	355	return *mfDataLen > 0;
	356	}
	357
dca8220f OM	358	bool NTParityChk(TAuthData *ad, uint32_t ntx) {
	359	if (
	360	(oddparity8(ntx >> 8 & 0xff) ^ (ntx & 0x01) ^ ((ad->nt_enc_par >> 5) & 0x01) ^ (ad->nt_enc & 0x01)) \|\|
	361	(oddparity8(ntx >> 16 & 0xff) ^ (ntx >> 8 & 0x01) ^ ((ad->nt_enc_par >> 6) & 0x01) ^ (ad->nt_enc >> 8 & 0x01)) \|\|
	362	(oddparity8(ntx >> 24 & 0xff) ^ (ntx >> 16 & 0x01) ^ ((ad->nt_enc_par >> 7) & 0x01) ^ (ad->nt_enc >> 16 & 0x01))
	363	)
	364	return false;
	365
	366	uint32_t ar = prng_successor(ntx, 64);
	367	if (
	368	(oddparity8(ar >> 8 & 0xff) ^ (ar & 0x01) ^ ((ad->ar_enc_par >> 5) & 0x01) ^ (ad->ar_enc & 0x01)) \|\|
	369	(oddparity8(ar >> 16 & 0xff) ^ (ar >> 8 & 0x01) ^ ((ad->ar_enc_par >> 6) & 0x01) ^ (ad->ar_enc >> 8 & 0x01)) \|\|
	370	(oddparity8(ar >> 24 & 0xff) ^ (ar >> 16 & 0x01) ^ ((ad->ar_enc_par >> 7) & 0x01) ^ (ad->ar_enc >> 16 & 0x01))
	371	)
	372	return false;
	373
	374	uint32_t at = prng_successor(ntx, 96);
	375	if (
	376	(oddparity8(ar & 0xff) ^ (at >> 24 & 0x01) ^ ((ad->ar_enc_par >> 4) & 0x01) ^ (ad->at_enc >> 24 & 0x01)) \|\|
	377	(oddparity8(at >> 8 & 0xff) ^ (at & 0x01) ^ ((ad->at_enc_par >> 5) & 0x01) ^ (ad->at_enc & 0x01)) \|\|
	378	(oddparity8(at >> 16 & 0xff) ^ (at >> 8 & 0x01) ^ ((ad->at_enc_par >> 6) & 0x01) ^ (ad->at_enc >> 8 & 0x01)) \|\|
	379	(oddparity8(at >> 24 & 0xff) ^ (at >> 16 & 0x01) ^ ((ad->at_enc_par >> 7) & 0x01) ^ (ad->at_enc >> 16 & 0x01))
	380	)
	381	return false;
	382
	383	return true;
	384	}
	385
c6a886fb	386	bool NestedCheckKey(uint64_t key, TAuthData ad, uint8_t cmd, uint8_t cmdsize) {
dca8220f OM	387	uint8_t buf[32] = {0};
	388	struct Crypto1State *pcs;
	389
	390	pcs = crypto1_create(key);
	391	uint32_t nt1 = crypto1_word(pcs, ad->nt_enc ^ ad->uid, 1) ^ ad->nt_enc;
	392	uint32_t ar = prng_successor(nt1, 64);
	393	uint32_t at = prng_successor(nt1, 96);
	394	printf("key> nested auth uid: %08x nt: %08x nt_parity: %s ar: %08x at: %08x\n", ad->uid, nt1, printBitsPar(&ad->nt_enc_par, 4), ar, at);
	395	uint32_t nr1 = crypto1_word(pcs, ad->nr_enc, 1) ^ ad->nr_enc;
	396	uint32_t ar1 = crypto1_word(pcs, 0, 0) ^ ad->ar_enc;
	397	uint32_t at1 = crypto1_word(pcs, 0, 0) ^ ad->at_enc;
	398	printf("key> the same key test. nr1: %08x ar1: %08x at1: %08x \n", nr1, ar1, at1);
	399
	400	if (NTParityChk(ad, nt1))
	401	printf("key> the same key test OK. key=%x%x\n", (unsigned int)((key & 0xFFFFFFFF00000000) >> 32), (unsigned int)(key & 0xFFFFFFFF));
	402	else {
	403	printf("key> the same key test. check nt parity error.\n");
	404	return false;
	405	}
	406
	407	memcpy(buf, cmd, cmdsize);
	408	mf_crypto1_decrypt(pcs, buf, cmdsize, 0);
	409
e0158d33 OM	410	crypto1_destroy(pcs);
e0158d33 OM	411
dca8220f	412	return CheckCrc14443(CRC_14443_A, buf, cmdsize);
c6a886fb	413	}