RfidResearchGroup/proxmark3
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FIX: the lfsampling.c for t55xx had a tendecy to enter a neverending loop. Moved exit branch into the while statement, which seems to solve it.

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FIX: Strange int -> uint8_t casting behavior  (0x05 gets the 25bit set and becomes 0x10005 instead) in fskdemod,  removed int and sscanf.
This commit is contained in:
iceman1001 2015-12-01 22:38:37 +01:00
parent fff6d2a3ba
commit 3f26796673
3 changed files with 21 additions and 22 deletions
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5
armsrc/lfsampling.c
View file

@ -271,7 +271,7 @@ void doT55x7Acquisition(size_t sample_size) {
uint8_t curSample = 0;
uint8_t lastSample = 0;
uint16_t skipCnt = 0;
while(!BUTTON_PRESS() && !usb_poll_validate_length() && skipCnt<1000) {
while(!BUTTON_PRESS() && !usb_poll_validate_length() && skipCnt < 1000 && (i < bufsize) ) {
WDT_HIT();
if (AT91C_BASE_SSC->SSC_SR & AT91C_SSC_TXRDY) {
AT91C_BASE_SSC->SSC_THR = 0x43;
@ -306,11 +306,10 @@ void doT55x7Acquisition(size_t sample_size) {
// if just found start - recover last sample
if (!startFound) {
dest[i++] = lastSample;
startFound = true;
startFound = true;
}
// collect samples
dest[i++] = curSample;
if (i >= bufsize-1) break;
}
}
}

36
client/cmddata.c
View file

@ -934,15 +934,15 @@ char *GetFSKType(uint8_t fchigh, uint8_t fclow, uint8_t invert)
int FSKrawDemod(const char *Cmd, bool verbose)
{
//raw fsk demod no manchester decoding no start bit finding just get binary from wave
uint8_t rfLen, invert, fchigh, fclow;
//set defaults
int rfLen = 0;
int invert = 0;
int fchigh = 0;
int fclow = 0;
//set options from parameters entered with the command
sscanf(Cmd, "%i %i %i %i", &rfLen, &invert, &fchigh, &fclow);
rfLen = param_get8ex(Cmd, 0, 0, 10);
invert = param_get8ex(Cmd, 1, 0, 10);
fchigh = param_get8ex(Cmd, 2, 0, 10);
fclow = param_get8ex(Cmd, 3, 0, 10);
if (strlen(Cmd)>0 && strlen(Cmd)<=2) {
if (rfLen==1){
invert = 1; //if invert option only is used
@ -958,31 +958,31 @@ int FSKrawDemod(const char *Cmd, bool verbose)
if (fchigh==0 || fclow == 0){
fcs = countFC(BitStream, BitLen, 1);
if (fcs==0){
fchigh=10;
fclow=8;
}else{
fchigh = 10;
fclow = 8;
} else {
fchigh = (fcs >> 8) & 0xFF;
fclow = fcs & 0xFF;
}
}
//get bit clock length
if (rfLen==0){
if (rfLen == 0){
rfLen = detectFSKClk(BitStream, BitLen, fchigh, fclow);
if (rfLen == 0) rfLen = 50;
}
int size = fskdemod(BitStream,BitLen,(uint8_t)rfLen,(uint8_t)invert,(uint8_t)fchigh,(uint8_t)fclow);
if (size>0){
setDemodBuf(BitStream,size,0);
int size = fskdemod(BitStream, BitLen, rfLen, invert, fchigh, fclow);
if (size > 0){
setDemodBuf(BitStream, size, 0);
// Now output the bitstream to the scrollback by line of 16 bits
if (verbose || g_debugMode) {
PrintAndLog("\nUsing Clock:%d, invert:%d, fchigh:%d, fclow:%d", rfLen, invert, fchigh, fclow);
PrintAndLog("%s decoded bitstream:",GetFSKType(fchigh,fclow,invert));
PrintAndLog("\nUsing Clock:%d, invert:%d, fchigh:%d, fclow:%u", rfLen, invert, fchigh, fclow);
PrintAndLog("%s decoded bitstream:", GetFSKType(fchigh, fclow, invert));
printDemodBuff();
}
return 1;
} else{
} else {
if (g_debugMode) PrintAndLog("no FSK data found");
}
return 0;

2
client/cmdlft55xx.c
View file

@ -1407,7 +1407,7 @@ int CmdT55xxBruteForce(const char *Cmd) {
found = tryDetectModulation();
if ( found ) {
PrintAndLog("Found valid password:[%08X]", testpwd);
PrintAndLog("Found valid password: [%08X]", testpwd);
return 0;
}
}