From: Oleg Moiseenko <olegmsn@gmail.com>
Date: Tue, 18 Sep 2018 15:29:59 +0000 (+0300)
Subject: Merge branch 'master' into emv_argtable
X-Git-Tag: v3.1.0~9^2~3
X-Git-Url: http://cvs.zerfleddert.de/cgi-bin/gitweb.cgi/proxmark3-svn/commitdiff_plain/654b6ae3f4bf56bc210022b603edbb1575e05dff

Merge branch 'master' into emv_argtable
---

654b6ae3f4bf56bc210022b603edbb1575e05dff
diff --cc client/emv/cmdemv.c
index d1ae2d45,541f505a..dceade79
--- a/client/emv/cmdemv.c
+++ b/client/emv/cmdemv.c
@@@ -11,7 -11,21 +11,22 @@@
  #include <ctype.h>
  #include "cmdemv.h"
  #include "test/cryptotest.h"
 +#include "cliparser/cliparser.h"
+ #include <jansson.h>
+ 
+ int UsageCmdHFEMVSelect(void) {
+ 	PrintAndLog("HELP :  Executes select applet command:\n");
+ 	PrintAndLog("Usage:  hf emv select [-s][-k][-a][-t] <HEX applet AID>\n");
+ 	PrintAndLog("  Options:");
+ 	PrintAndLog("  -s       : select card");
+ 	PrintAndLog("  -k       : keep field for next command");
+ 	PrintAndLog("  -a       : show APDU reqests and responses\n");
+ 	PrintAndLog("  -t       : TLV decode results\n");
+ 	PrintAndLog("Samples:");
+ 	PrintAndLog(" hf emv select -s a00000000101 -> select card, select applet");
+ 	PrintAndLog(" hf emv select -s -t a00000000101 -> select card, select applet, show result in TLV");
+ 	return 0;
+ }
  
  int CmdHFEMVSelect(const char *cmd) {
  	uint8_t data[APDU_AID_LEN] = {0};
@@@ -105,197 -190,75 +120,197 @@@ int CmdHFEMVSearch(const char *cmd) 
  	return 0;
  }
  
 -int UsageCmdHFEMVPPSE(void) {
 -	PrintAndLog("HELP :  Executes PSE/PPSE select command. It returns list of applet on the card:\n");
 -	PrintAndLog("Usage:  hf emv pse [-s][-k][-1][-2][-a][-t]\n");
 -	PrintAndLog("  Options:");
 -	PrintAndLog("  -s       : select card");
 -	PrintAndLog("  -k       : keep field for next command");
 -	PrintAndLog("  -1       : ppse (1PAY.SYS.DDF01)");
 -	PrintAndLog("  -2       : pse (2PAY.SYS.DDF01)");
 -	PrintAndLog("  -a       : show APDU reqests and responses\n");
 -	PrintAndLog("  -t       : TLV decode results\n");
 -	PrintAndLog("Samples:");
 -	PrintAndLog(" hf emv pse -s -1 -> select, get pse");
 -	PrintAndLog(" hf emv pse -s -k -2 -> select, get ppse, keep field");
 -	PrintAndLog(" hf emv pse -s -t -2 -> select, get ppse, show result in TLV");
 -	return 0;
 -}
 -
  int CmdHFEMVPPSE(const char *cmd) {
  	
 +	CLIParserInit("hf emv pse", 
 +		"Executes PSE/PPSE select command. It returns list of applet on the card:\n", 
 +		"Usage:\n\thf emv pse -s1 -> select, get pse\n\thf emv pse -st2 -> select, get ppse, show result in TLV\n");
 +
 +	void* argtable[] = {
 +		arg_param_begin,
 +		arg_lit0("sS",  "select",  "activate field and select card"),
 +		arg_lit0("kK",  "keep",    "keep field ON for next command"),
 +		arg_lit0("1",   "pse",     "pse (1PAY.SYS.DDF01) mode"),
 +		arg_lit0("2",   "ppse",    "ppse (2PAY.SYS.DDF01) mode (default mode)"),
 +		arg_lit0("aA",  "apdu",    "show APDU reqests and responses"),
 +		arg_lit0("tT",  "tlv",     "TLV decode results of selected applets"),
 +		arg_param_end
 +	};
 +	CLIExecWithReturn(cmd, argtable, true);
 +	
 +	bool activateField = arg_get_lit(1);
 +	bool leaveSignalON = arg_get_lit(2);
  	uint8_t PSENum = 2;
 -	bool activateField = false;
 -	bool leaveSignalON = false;
 -	bool decodeTLV = false;
 +	if (arg_get_lit(3))
 +		PSENum = 1;
 +	if (arg_get_lit(4))
 +		PSENum = 2;
 +	bool APDULogging = arg_get_lit(5);
 +	bool decodeTLV = arg_get_lit(6);
 +	CLIParserFree();	
 +	
 +	SetAPDULogging(APDULogging);
 +	
 +	// exec
 +	uint8_t buf[APDU_RES_LEN] = {0};
 +	size_t len = 0;
 +	uint16_t sw = 0;
 +	int res = EMVSelectPSE(activateField, leaveSignalON, PSENum, buf, sizeof(buf), &len, &sw);
 +	
 +	if (sw)
 +		PrintAndLog("APDU response status: %04x - %s", sw, GetAPDUCodeDescription(sw >> 8, sw & 0xff)); 
  
 -	if (strlen(cmd) < 1) {
 -		UsageCmdHFEMVPPSE();
 +	if (res)
 +		return res;
 +	
 +	
 +	if (decodeTLV)
 +		TLVPrintFromBuffer(buf, len);
 +
 +	return 0;
 +}
 +
- #define TLV_ADD(tag, value)( tlvdb_add(tlvRoot, tlvdb_fixed(tag, sizeof(value) - 1, (const unsigned char *)value)) )
++#define TLV_ADD(tag, value)( tlvdb_change_or_add_node(tlvRoot, tag, sizeof(value) - 1, (const unsigned char *)value) )
 +
 +int CmdHFEMVGPO(const char *cmd) {
 +	uint8_t data[APDU_RES_LEN] = {0};
 +	int datalen = 0;
 +
 +	CLIParserInit("hf emv gpo", 
 +		"Executes Get Processing Options command. It returns data in TLV format (0x77 - format2) or plain format (0x80 - format1).\nNeeds a EMV applet to be selected.", 
 +		"Usage:\n\thf emv gpo -k -> execute GPO\n"
 +			"\thf emv gpo -st 01020304 -> execute GPO with 4-byte PDOL data, show result in TLV\n"); 
 +			// here need to add load params from file and gen pdol
 +
 +	void* argtable[] = {
 +		arg_param_begin,
 +		arg_lit0("kK",  "keep",    "keep field ON for next command"),
 +		arg_lit0("pP",  "params",  "load parameters for PDOL making from `emv/defparams.json` file (by default uses default parameters) (NOT WORK!!!)"),
 +		arg_lit0("mM",  "make",    "make PDOLdata from PDOL (tag 9F38) and parameters (NOT WORK!!!)"),
 +		arg_lit0("aA",  "apdu",    "show APDU reqests and responses"),
 +		arg_lit0("tT",  "tlv",     "TLV decode results of selected applets"),
 +		arg_str0(NULL,  NULL,      "<HEX PDOLdata/PDOL>", NULL),
 +		arg_param_end
 +	};
 +	CLIExecWithReturn(cmd, argtable, true);
 +	
 +	bool leaveSignalON = arg_get_lit(1);
 +	bool paramsLoadFromFile = arg_get_lit(2);
 +	bool dataMakeFromPDOL = arg_get_lit(3);
 +	bool APDULogging = arg_get_lit(4);
 +	bool decodeTLV = arg_get_lit(5);
 +	CLIGetStrWithReturn(6, data, &datalen);
 +	CLIParserFree();	
 +	
 +	SetAPDULogging(APDULogging);
 +	
 +	// Init TLV tree
 +	const char *alr = "Root terminal TLV tree";
 +	struct tlvdb *tlvRoot = tlvdb_fixed(1, strlen(alr), (const unsigned char *)alr);
 +	
 +	// calc PDOL
 +	struct tlv *pdol_data_tlv = NULL;
 +	struct tlv data_tlv = {
 +		.tag = 0x01,
 +		.len = datalen,
 +		.value = (uint8_t *)data,
 +	};
 +	if (dataMakeFromPDOL) {
 +		// TODO
 +		PrintAndLog("Make PDOL data not implemented!");
 +
 +		//9F02:(Amount, authorized (Numeric)) len:6
 +		TLV_ADD(0x9F02, "\x00\x00\x00\x00\x01\x00");
 +		//9F1A:(Terminal Country Code) len:2
 +		TLV_ADD(0x9F1A, "ru");
 +		//5F2A:(Transaction Currency Code) len:2
 +		// USD 840, EUR 978, RUR 810, RUB 643, RUR 810(old), UAH 980, AZN 031, n/a 999
 +		TLV_ADD(0x5F2A, "\x09\x80");
 +		//9A:(Transaction Date) len:3
 +		TLV_ADD(0x9A,   "\x00\x00\x00");
 +		//9C:(Transaction Type) len:1   |  00 => Goods and service #01 => Cash
 +		TLV_ADD(0x9C,   "\x00");
 +		// 9F37 Unpredictable Number len:4
 +		TLV_ADD(0x9F37, "\x01\x02\x03\x04");
 +		// 9F6A Unpredictable Number (MSD for UDOL) len:4
 +		TLV_ADD(0x9F6A, "\x01\x02\x03\x04");
 +		//9F66:(Terminal Transaction Qualifiers (TTQ)) len:4
 +		TLV_ADD(0x9F66, "\x26\x00\x00\x00"); // qVSDC
 +
 +		if (paramsLoadFromFile) {
 +		};
 +/*		pdol_data_tlv = dol_process(tlvdb_get(tlvRoot, 0x9f38, NULL), tlvRoot, 0x83);
 +		if (!pdol_data_tlv){
 +			PrintAndLog("ERROR: can't create PDOL TLV.");
 +			tlvdb_free(tlvRoot);
 +			return 4;
 +		}*/
  		return 0;
 +	} else {
 +		pdol_data_tlv = &data_tlv;
 +	}
 +
 +	size_t pdol_data_tlv_data_len = 0;
 +	unsigned char *pdol_data_tlv_data = tlv_encode(pdol_data_tlv, &pdol_data_tlv_data_len);
 +	if (!pdol_data_tlv_data) {
 +		PrintAndLog("ERROR: can't create PDOL data.");
 +		tlvdb_free(tlvRoot);
 +		return 4;
  	}
 +	PrintAndLog("PDOL data[%d]: %s", pdol_data_tlv_data_len, sprint_hex(pdol_data_tlv_data, pdol_data_tlv_data_len));
 +	
 +	// exec
 +	uint8_t buf[APDU_RES_LEN] = {0};
 +	size_t len = 0;
 +	uint16_t sw = 0;
 +	int res = EMVGPO(leaveSignalON, pdol_data_tlv_data, pdol_data_tlv_data_len, buf, sizeof(buf), &len, &sw, tlvRoot);
 +	
 +	free(pdol_data_tlv_data);
 +	tlvdb_free(tlvRoot);
 +	
 +	if (sw)
 +		PrintAndLog("APDU response status: %04x - %s", sw, GetAPDUCodeDescription(sw >> 8, sw & 0xff)); 
  
 -	SetAPDULogging(false);
 +	if (res)
 +		return res;
  	
 -	int cmdp = 0;
 -	while(param_getchar(cmd, cmdp) != 0x00) {
 -		char c = param_getchar(cmd, cmdp);
 -		if ((c == '-') && (param_getlength(cmd, cmdp) == 2))
 -			switch (param_getchar_indx(cmd, 1, cmdp)) {
 -				case 'h':
 -				case 'H':
 -					UsageCmdHFEMVPPSE();
 -					return 0;
 -				case 's':
 -				case 'S':
 -					activateField = true;
 -					break;
 -				case 'k':
 -				case 'K':
 -					leaveSignalON = true;
 -					break;
 -				case 'a':
 -				case 'A':
 -					SetAPDULogging(true);
 -					break;
 -				case 't':
 -				case 'T':
 -					decodeTLV = true;
 -					break;
 -				case '1':
 -					PSENum = 1;
 -					break;
 -				case '2':
 -					PSENum = 2;
 -					break;
 -				default:
 -					PrintAndLog("Unknown parameter '%c'", param_getchar_indx(cmd, 1, cmdp));
 -					return 1;
 -		}
 -		cmdp++;
 +	if (decodeTLV)
 +		TLVPrintFromBuffer(buf, len);
 +
 +	return 0;
 +}
 +
 +int CmdHFEMVReadRecord(const char *cmd) {
 +	uint8_t data[APDU_RES_LEN] = {0};
 +	int datalen = 0;
 +
 +	CLIParserInit("hf emv readrec", 
 +		"Executes Read Record command. It returns data in TLV format.\nNeeds a bank applet to be selected and sometimes needs GPO to be executed.", 
 +		"Usage:\n\thf emv readrec -k 0101 -> read file SFI=01, SFIrec=01\n\thf emv readrec -kt 0201-> read file 0201 and show result in TLV\n");
 +
 +	void* argtable[] = {
 +		arg_param_begin,
 +		arg_lit0("kK",  "keep",    "keep field ON for next command"),
 +		arg_lit0("aA",  "apdu",    "show APDU reqests and responses"),
 +		arg_lit0("tT",  "tlv",     "TLV decode results of selected applets"),
 +		arg_str1(NULL,  NULL,      "<SFI 1byte HEX><SFIrec 1byte HEX>", NULL),
 +		arg_param_end
 +	};
 +	CLIExecWithReturn(cmd, argtable, true);
 +	
 +	bool leaveSignalON = arg_get_lit(1);
 +	bool APDULogging = arg_get_lit(2);
 +	bool decodeTLV = arg_get_lit(3);
 +	CLIGetStrWithReturn(4, data, &datalen);
 +	CLIParserFree();
 +	
 +	if (datalen != 2) {
 +		PrintAndLog("ERROR: Command needs to have 2 bytes of data");
 +		return 1;
  	}
  	
 +	SetAPDULogging(APDULogging);
 +		
  	// exec
  	uint8_t buf[APDU_RES_LEN] = {0};
  	size_t len = 0;
@@@ -315,182 -278,9 +330,182 @@@
  	return 0;
  }
  
 +int CmdHFEMVAC(const char *cmd) {
 +	uint8_t data[APDU_RES_LEN] = {0};
 +	int datalen = 0;
 +
 +	CLIParserInit("hf emv genac", 
 +		"Generate Application Cryptogram command. It returns data in TLV format .\nNeeds a EMV applet to be selected and GPO to be executed.", 
 +		"Usage:\n\thf emv genac -k 0102 -> generate AC with 2-byte CDOLdata and keep field ON after command\n"
 +			"\thf emv genac -t 01020304 -> generate AC with 4-byte CDOL data, show result in TLV\n"
 +			"\thf emv genac -Daac 01020304 -> generate AC with 4-byte CDOL data and terminal decision 'declined'\n"); 
 +
 +	void* argtable[] = {
 +		arg_param_begin,
 +		arg_lit0("kK",  "keep",     "keep field ON for next command"),
 +		arg_lit0("cC",  "cda",      "executes CDA transaction. Needs to get SDAD in results."),
 +		arg_str0("dD",  "decision", "<aac|tc|arqc>", "Terminal decision. aac - declined, tc - approved, arqc - online authorisation requested"),
 +		arg_lit0("aA",  "apdu",     "show APDU reqests and responses"),
 +		arg_lit0("tT",  "tlv",      "TLV decode results of selected applets"),
 +		arg_str1(NULL,  NULL,       "<HEX CDOLdata>", NULL),
 +		arg_param_end
 +	};
 +	CLIExecWithReturn(cmd, argtable, false);
 +	
 +	bool leaveSignalON = arg_get_lit(1);
 +	bool trTypeCDA = arg_get_lit(2);
 +	uint8_t termDecision = 0xff;
 +	if (arg_get_str_len(3)) {
 +		if (!strncmp(arg_get_str(3)->sval[0], "aac", 4))
 +			termDecision = EMVAC_AAC;
 +		if (!strncmp(arg_get_str(3)->sval[0], "tc", 4))
 +			termDecision = EMVAC_TC;
 +		if (!strncmp(arg_get_str(3)->sval[0], "arqc", 4))
 +			termDecision = EMVAC_ARQC;
 +
 +		if (termDecision == 0xff) {
 +			PrintAndLog("ERROR: can't find terminal decision '%s'", arg_get_str(3)->sval[0]);
 +			return 1;
 +		}
 +	} else {
 +		termDecision = EMVAC_TC;
 +	}
 +	if (trTypeCDA)
 +		termDecision = termDecision | EMVAC_CDAREQ;
 +	bool APDULogging = arg_get_lit(4);
 +	bool decodeTLV = arg_get_lit(5);
 +	CLIGetStrWithReturn(6, data, &datalen);
 +	CLIParserFree();	
 +	
 +	SetAPDULogging(APDULogging);
 +	
 +	// Init TLV tree
 +	const char *alr = "Root terminal TLV tree";
 +	struct tlvdb *tlvRoot = tlvdb_fixed(1, strlen(alr), (const unsigned char *)alr);
 +	
 +	// calc CDOL
 +	struct tlv *cdol_data_tlv = NULL;
 +//	struct tlv *cdol_data_tlv = dol_process(tlvdb_get(tlvRoot, 0x8c, NULL), tlvRoot, 0x01); // 0x01 - dummy tag
 +	struct tlv data_tlv = {
 +		.tag = 0x01,
 +		.len = datalen,
 +		.value = (uint8_t *)data,
 +	};	
 +	cdol_data_tlv = &data_tlv;
 +	PrintAndLog("CDOL data[%d]: %s", cdol_data_tlv->len, sprint_hex(cdol_data_tlv->value, cdol_data_tlv->len));
 +	
 +	// exec
 +	uint8_t buf[APDU_RES_LEN] = {0};
 +	size_t len = 0;
 +	uint16_t sw = 0;
 +	int res = EMVAC(leaveSignalON, termDecision, (uint8_t *)cdol_data_tlv->value, cdol_data_tlv->len, buf, sizeof(buf), &len, &sw, tlvRoot);
 +	
 +//	free(cdol_data_tlv);
 +	tlvdb_free(tlvRoot);
 +	
 +	if (sw)
 +		PrintAndLog("APDU response status: %04x - %s", sw, GetAPDUCodeDescription(sw >> 8, sw & 0xff)); 
 +
 +	if (res)
 +		return res;
 +	
 +	if (decodeTLV)
 +		TLVPrintFromBuffer(buf, len);
 +
 +	return 0;	
 +}
 +
 +int CmdHFEMVGenerateChallenge(const char *cmd) {
 +
 +	CLIParserInit("hf emv challenge", 
 +		"Executes Generate Challenge command. It returns 4 or 8-byte random number from card.\nNeeds a EMV applet to be selected and GPO to be executed.", 
 +		"Usage:\n\thf emv challenge -> get challenge\n\thf emv challenge -k -> get challenge, keep fileld ON\n");
 +
 +	void* argtable[] = {
 +		arg_param_begin,
 +		arg_lit0("kK",  "keep",    "keep field ON for next command"),
 +		arg_lit0("aA",  "apdu",    "show APDU reqests and responses"),
 +		arg_param_end
 +	};
 +	CLIExecWithReturn(cmd, argtable, true);
 +	
 +	bool leaveSignalON = arg_get_lit(1);
 +	bool APDULogging = arg_get_lit(2);
 +	CLIParserFree();	
 +	
 +	SetAPDULogging(APDULogging);
 +	
 +	// exec
 +	uint8_t buf[APDU_RES_LEN] = {0};
 +	size_t len = 0;
 +	uint16_t sw = 0;
 +	int res = EMVGenerateChallenge(leaveSignalON, buf, sizeof(buf), &len, &sw, NULL);
 +	
 +	if (sw)
 +		PrintAndLog("APDU response status: %04x - %s", sw, GetAPDUCodeDescription(sw >> 8, sw & 0xff)); 
 +
 +	if (res)
 +		return res;
 +
 +	PrintAndLog("Challenge: %s", sprint_hex(buf, len));
 +	
 +	if (len != 4 && len != 8)
 +		PrintAndLog("WARNING: length of challenge must be 4 or 8, but it %d", len);
 +	
 +	return 0;
 +}
 +
 +int CmdHFEMVInternalAuthenticate(const char *cmd) {
 +	uint8_t data[APDU_RES_LEN] = {0};
 +	int datalen = 0;
 +
 +	CLIParserInit("hf emv intauth", 
 +		"Generate Internal Authenticate command. Usually needs 4-byte random number. It returns data in TLV format .\nNeeds a EMV applet to be selected and GPO to be executed.", 
 +		"Usage:\n\thf emv intauth -k 01020304 -> execute Internal Authenticate with 4-byte DDOLdata and keep field ON after command\n"
 +			"\thf emv intauth -t 01020304 -> execute Internal Authenticate with 4-byte DDOL data, show result in TLV\n"); 
 +
 +	void* argtable[] = {
 +		arg_param_begin,
 +		arg_lit0("kK",  "keep",    "keep field ON for next command"),
 +		arg_lit0("aA",  "apdu",    "show APDU reqests and responses"),
 +		arg_lit0("tT",  "tlv",     "TLV decode results of selected applets"),
 +		arg_str1(NULL,  NULL,      "<HEX DDOLdata>", NULL),
 +		arg_param_end
 +	};
 +	CLIExecWithReturn(cmd, argtable, false);
 +	
 +	bool leaveSignalON = arg_get_lit(1);
 +	bool APDULogging = arg_get_lit(2);
 +	bool decodeTLV = arg_get_lit(3);
 +	CLIGetStrWithReturn(4, data, &datalen);
 +	CLIParserFree();	
 +	
 +	SetAPDULogging(APDULogging);
 +	
 +	// DDOL
 +	PrintAndLog("DDOL data[%d]: %s", datalen, sprint_hex(data, datalen));
 +	
 +	// exec
 +	uint8_t buf[APDU_RES_LEN] = {0};
 +	size_t len = 0;
 +	uint16_t sw = 0;
 +	int res = EMVInternalAuthenticate(leaveSignalON, data, datalen, buf, sizeof(buf), &len, &sw, NULL);
 +	
 +	if (sw)
 +		PrintAndLog("APDU response status: %04x - %s", sw, GetAPDUCodeDescription(sw >> 8, sw & 0xff)); 
 +
 +	if (res)
 +		return res;
 +	
 +	if (decodeTLV)
 +		TLVPrintFromBuffer(buf, len);
 +
 +	return 0;	
 +}
 +
  int UsageCmdHFEMVExec(void) {
  	PrintAndLog("HELP :  Executes EMV contactless transaction:\n");
- 	PrintAndLog("Usage:  hf emv exec [-s][-a][-t][-f][-v][-c][-x][-g]\n");
+ 	PrintAndLog("Usage:  hf emv exec [-s][-a][-t][-j][-f][-v][-c][-x][-g]\n");
  	PrintAndLog("  Options:");
  	PrintAndLog("  -s       : select card");
  	PrintAndLog("  -a       : show APDU reqests and responses\n");
@@@ -507,8 -298,159 +523,158 @@@
  	return 0;
  }
  
 -#define TLV_ADD(tag, value)( tlvdb_change_or_add_node(tlvRoot, tag, sizeof(value) - 1, (const unsigned char *)value) )
  #define dreturn(n) {free(pdol_data_tlv);tlvdb_free(tlvSelect);tlvdb_free(tlvRoot);DropField();return n;}
  
+ bool HexToBuffer(const char *errormsg, const char *hexvalue, uint8_t * buffer, size_t maxbufferlen, size_t *bufferlen) {
+ 	int buflen = 0;	
+ 	
+ 	switch(param_gethex_to_eol(hexvalue, 0, buffer, maxbufferlen, &buflen)) {
+ 	case 1:
+ 		PrintAndLog("%s Invalid HEX value.", errormsg);
+ 		return false;
+ 	case 2:
+ 		PrintAndLog("%s Hex value too large.", errormsg);
+ 		return false;
+ 	case 3:
+ 		PrintAndLog("%s Hex value must have even number of digits.", errormsg);
+ 		return false;
+ 	}
+ 	
+ 	if (buflen > maxbufferlen) {
+ 		PrintAndLog("%s HEX length (%d) more than %d", errormsg, *bufferlen, maxbufferlen);
+ 		return false;
+ 	}
+ 	
+ 	*bufferlen = buflen;
+ 	
+ 	return true;
+ }
+ 
+ bool ParamLoadFromJson(struct tlvdb *tlv) {
+ 	json_t *root;
+ 	json_error_t error;
+ 
+ 	if (!tlv) {
+ 		PrintAndLog("ERROR load params: tlv tree is NULL.");
+ 		return false; 
+ 	}
+ 
+ 	// current path + file name
+ 	const char *relfname = "emv/defparams.json"; 
+ 	char fname[strlen(get_my_executable_directory()) + strlen(relfname) + 1];
+ 	strcpy(fname, get_my_executable_directory());
+ 	strcat(fname, relfname);
+ 
+ 	root = json_load_file(fname, 0, &error);
+ 	if (!root) {
+ 		PrintAndLog("Load params: json error on line %d: %s", error.line, error.text);
+ 		return false; 
+ 	}
+ 	
+ 	if (!json_is_array(root)) {
+ 		PrintAndLog("Load params: Invalid json format. root must be array.");
+ 		return false; 
+ 	}
+ 	
+ 	PrintAndLog("Load params: json OK");
+ 	
+ 	for(int i = 0; i < json_array_size(root); i++) {
+ 		json_t *data, *jtype, *jlength, *jvalue;
+ 
+ 		data = json_array_get(root, i);
+ 		if(!json_is_object(data))
+ 		{
+ 			PrintAndLog("Load params: data [%d] is not an object", i + 1);
+ 			json_decref(root);
+ 			return false;
+ 		}
+ 		
+ 		jtype = json_object_get(data, "type");
+ 		if(!json_is_string(jtype))
+ 		{
+ 			PrintAndLog("Load params: data [%d] type is not a string", i + 1);
+ 			json_decref(root);
+ 			return false;
+ 		}
+ 		const char *tlvType = json_string_value(jtype);
+ 
+ 		jvalue = json_object_get(data, "value");
+ 		if(!json_is_string(jvalue))
+ 		{
+ 			PrintAndLog("Load params: data [%d] value is not a string", i + 1);
+ 			json_decref(root);
+ 			return false;
+ 		}
+ 		const char *tlvValue = json_string_value(jvalue);
+ 
+ 		jlength = json_object_get(data, "length");
+ 		if(!json_is_number(jlength))
+ 		{
+ 			PrintAndLog("Load params: data [%d] length is not a number", i + 1);
+ 			json_decref(root);
+ 			return false;
+ 		}
+ 		
+ 		int tlvLength = json_integer_value(jlength);
+ 		if (tlvLength > 250) {
+ 			PrintAndLog("Load params: data [%d] length more than 250", i + 1);
+ 			json_decref(root);
+ 			return false;
+ 		}
+ 		
+ 		PrintAndLog("TLV param: %s[%d]=%s", tlvType, tlvLength, tlvValue);
+ 		uint8_t buf[251] = {0};
+ 		size_t buflen = 0;
+ 		
+ 		// here max length must be 4, but now tlv_tag_t is 2-byte var. so let it be 2 by now...  TODO: needs refactoring tlv_tag_t...
+ 		if (!HexToBuffer("TLV Error type:", tlvType, buf, 2, &buflen)) { 
+ 			json_decref(root);
+ 			return false;
+ 		}
+ 		tlv_tag_t tag = 0;
+ 		for (int i = 0; i < buflen; i++) {
+ 			tag = (tag << 8) + buf[i];
+ 		}	
+ 		
+ 		if (!HexToBuffer("TLV Error value:", tlvValue, buf, sizeof(buf) - 1, &buflen)) {
+ 			json_decref(root);
+ 			return false;
+ 		}
+ 		
+ 		if (buflen != tlvLength) {
+ 			PrintAndLog("Load params: data [%d] length of HEX must(%d) be identical to length in TLV param(%d)", i + 1, buflen, tlvLength);
+ 			json_decref(root);
+ 			return false;
+ 		}
+ 		
+ 		tlvdb_change_or_add_node(tlv, tag, tlvLength, (const unsigned char *)buf);		
+ 	}
+ 
+ 	json_decref(root);
+ 
+ 	return true;
+ }
+ 
+ void ParamLoadDefaults(struct tlvdb *tlvRoot) {
+ 	//9F02:(Amount, authorized (Numeric)) len:6
+ 	TLV_ADD(0x9F02, "\x00\x00\x00\x00\x01\x00");
+ 	//9F1A:(Terminal Country Code) len:2
+ 	TLV_ADD(0x9F1A, "ru");
+ 	//5F2A:(Transaction Currency Code) len:2
+ 	// USD 840, EUR 978, RUR 810, RUB 643, RUR 810(old), UAH 980, AZN 031, n/a 999
+ 	TLV_ADD(0x5F2A, "\x09\x80");
+ 	//9A:(Transaction Date) len:3
+ 	TLV_ADD(0x9A,   "\x00\x00\x00");
+ 	//9C:(Transaction Type) len:1   |  00 => Goods and service #01 => Cash
+ 	TLV_ADD(0x9C,   "\x00");
+ 	// 9F37 Unpredictable Number len:4
+ 	TLV_ADD(0x9F37, "\x01\x02\x03\x04");
+ 	// 9F6A Unpredictable Number (MSD for UDOL) len:4
+ 	TLV_ADD(0x9F6A, "\x01\x02\x03\x04");
+ 	//9F66:(Terminal Transaction Qualifiers (TTQ)) len:4
+ 	TLV_ADD(0x9F66, "\x26\x00\x00\x00"); // qVSDC
+ }
+ 
  int CmdHFEMVExec(const char *cmd) {
  	bool activateField = false;
  	bool showAPDU = false;
@@@ -1044,17 -1005,13 +1229,18 @@@ int CmdHFEMVTest(const char *cmd) 
  
  int CmdHelp(const char *Cmd);
  static command_t CommandTable[] =  {
 -	{"help",	CmdHelp,		1,	"This help"},
 -	{"exec",	CmdHFEMVExec,	0,	"Executes EMV contactless transaction."},
 -	{"pse",		CmdHFEMVPPSE,	0,	"Execute PPSE. It selects 2PAY.SYS.DDF01 or 1PAY.SYS.DDF01 directory."},
 -	{"search",	CmdHFEMVSearch,	0,	"Try to select all applets from applets list and print installed applets."},
 -	{"select",	CmdHFEMVSelect,	0,	"Select applet."},
 +	{"help",		CmdHelp,						1,	"This help"},
 +	{"exec",		CmdHFEMVExec,					0,	"Executes EMV contactless transaction."},
 +	{"pse",			CmdHFEMVPPSE,					0,	"Execute PPSE. It selects 2PAY.SYS.DDF01 or 1PAY.SYS.DDF01 directory."},
 +	{"search",		CmdHFEMVSearch,					0,	"Try to select all applets from applets list and print installed applets."},
 +	{"select",		CmdHFEMVSelect,					0,	"Select applet."},
 +	{"gpo",			CmdHFEMVGPO,					0,	"Execute GetProcessingOptions."},
 +	{"readrec",		CmdHFEMVReadRecord,				0,	"Read files from card."},
 +	{"genac",		CmdHFEMVAC,						0,	"Generate ApplicationCryptogram."},
 +	{"challenge",	CmdHFEMVGenerateChallenge,		0,	"Generate challenge."},
 +	{"intauth",		CmdHFEMVInternalAuthenticate,	0,	"Internal authentication."},
+ //	{"scan",	CmdHFEMVScan,	0,	"Scan EMV card and save it contents to json file for emulator."},
 -	{"test",	CmdHFEMVTest,	0,	"Crypto logic test."},
 +	{"test",		CmdHFEMVTest,					0,	"Crypto logic test."},
  	{NULL, NULL, 0, NULL}
  };