X-Git-Url: http://git.zerfleddert.de/cgi-bin/gitweb.cgi/proxmark3-svn/blobdiff_plain/e0c635d19c58423d88ae698788a31c865e5554ab..8de6b69d1ef8f20c9cd7baa79590ff7a61c7254f:/client/mifarehost.c

diff --git a/client/mifarehost.c b/client/mifarehost.c
index fc29e10e..f34759df 100644
--- a/client/mifarehost.c
+++ b/client/mifarehost.c
@@ -295,9 +295,12 @@ uint32_t ks3;
 
 uint32_t uid;     // serial number
 uint32_t nt;      // tag challenge
+uint32_t nt_par; 
 uint32_t nr_enc;  // encrypted reader challenge
 uint32_t ar_enc;  // encrypted reader response
+uint32_t nr_ar_par; 
 uint32_t at_enc;  // encrypted tag response
+uint32_t at_par; 
 
 int isTraceCardEmpty(void) {
 	return ((traceCard[0] == 0) && (traceCard[1] == 0) && (traceCard[2] == 0) && (traceCard[3] == 0));
@@ -401,7 +404,7 @@ void mf_crypto1_decrypt(struct Crypto1State *pcs, uint8_t *data, int len, bool i
 }
 
 
-int mfTraceDecode(uint8_t *data_src, int len, bool wantSaveToEmlFile) {
+int mfTraceDecode(uint8_t *data_src, int len, uint32_t parity, bool wantSaveToEmlFile) {
 	uint8_t data[64];
 
 	if (traceState == TRACE_ERROR) return 1;
@@ -419,7 +422,13 @@ int mfTraceDecode(uint8_t *data_src, int len, bool wantSaveToEmlFile) {
 	
 	switch (traceState) {
 	case TRACE_IDLE: 
-		// TODO: check packet crc16!
+		// check packet crc16!
+		if ((len >= 4) && (!CheckCrc14443(CRC_14443_A, data, len))) {
+			PrintAndLog("dec> CRC ERROR!!!");
+			AddLogLine(logHexFileName, "dec> ", "CRC ERROR!!!"); 
+			traceState = TRACE_ERROR;  // do not decrypt the next commands
+			return 1;
+		}
 		
 		// AUTHENTICATION
 		if ((len ==4) && ((data[0] == 0x60) || (data[0] == 0x61))) {
@@ -498,6 +507,7 @@ int mfTraceDecode(uint8_t *data_src, int len, bool wantSaveToEmlFile) {
 			traceState = TRACE_AUTH2;
 
 			nt = bytes_to_num(data, 4);
+			nt_par = parity;
 			return 0;
 		} else {
 			traceState = TRACE_ERROR;
@@ -511,6 +521,7 @@ int mfTraceDecode(uint8_t *data_src, int len, bool wantSaveToEmlFile) {
 
 			nr_enc = bytes_to_num(data, 4);
 			ar_enc = bytes_to_num(data + 4, 4);
+			nr_ar_par = parity;
 			return 0;
 		} else {
 			traceState = TRACE_ERROR;
@@ -523,6 +534,7 @@ int mfTraceDecode(uint8_t *data_src, int len, bool wantSaveToEmlFile) {
 			traceState = TRACE_IDLE;
 
 			at_enc = bytes_to_num(data, 4);
+			at_par = parity;
 			
 			//  decode key here)
 			if (!traceCrypto1) {