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attempt hitag2 uid read for lf search

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This commit is contained in:
marshmellow42 2016-08-04 13:51:37 -04:00
commit f86d6b557a
4 changed files with 107 additions and 46 deletions
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67
armsrc/hitag2.c
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@ -697,6 +697,42 @@ static bool hitag2_test_auth_attempts(byte_t* rx, const size_t rxlen, byte_t* tx
return true;
}
static bool hitag2_read_uid(byte_t* rx, const size_t rxlen, byte_t* tx, size_t* txlen) {
// Reset the transmission frame length
*txlen = 0;
// Try to find out which command was send by selecting on length (in bits)
switch (rxlen) {
// No answer, try to resurrect
case 0: {
// Just starting or if there is no answer
*txlen = 5;
memcpy(tx,"\xc0",nbytes(*txlen));
} break;
// Received UID
case 32: {
// Check if we received answer tag (at)
if (bAuthenticating) {
bAuthenticating = false;
} else {
// Store the received block
memcpy(tag.sectors[blocknr],rx,4);
blocknr++;
}
if (blocknr > 0) {
//DbpString("Read successful!");
bSuccessful = true;
return false;
}
} break;
// Unexpected response
default: {
Dbprintf("Uknown frame length: %d",rxlen);
return false;
} break;
}
return true;
}
void SnoopHitag(uint32_t type) {
int frame_count;
@ -1123,19 +1159,18 @@ void ReaderHitag(hitag_function htf, hitag_data* htd) {
set_tracing(TRUE);
clear_trace();
DbpString("Starting Hitag reader family");
//DbpString("Starting Hitag reader family");
// Check configuration
switch(htf) {
case RHT2F_PASSWORD: {
Dbprintf("List identifier in password mode");
memcpy(password,htd->pwd.password,4);
blocknr = 0;
blocknr = 0;
bQuitTraceFull = false;
bQuiet = false;
bPwd = false;
} break;
case RHT2F_AUTHENTICATE: {
DbpString("Authenticating using nr,ar pair:");
memcpy(NrAr,htd->auth.NrAr,8);
@ -1145,7 +1180,6 @@ void ReaderHitag(hitag_function htf, hitag_data* htd) {
bAuthenticating = false;
bQuitTraceFull = true;
} break;
case RHT2F_CRYPTO: {
DbpString("Authenticating using key:");
memcpy(key,htd->crypto.key,6); //HACK; 4 or 6?? I read both in the code.
@ -1156,7 +1190,6 @@ void ReaderHitag(hitag_function htf, hitag_data* htd) {
bAuthenticating = false;
bQuitTraceFull = true;
} break;
case RHT2F_TEST_AUTH_ATTEMPTS: {
Dbprintf("Testing %d authentication attempts",(auth_table_len/8));
auth_table_pos = 0;
@ -1165,7 +1198,12 @@ void ReaderHitag(hitag_function htf, hitag_data* htd) {
bQuiet = false;
bCrypto = false;
} break;
case RHT2F_UID_ONLY: {
blocknr = 0;
bQuiet = false;
bCrypto = false;
bAuthenticating = false;
} break;
default: {
Dbprintf("Error, unknown function: %d",htf);
return;
@ -1222,22 +1260,22 @@ void ReaderHitag(hitag_function htf, hitag_data* htd) {
// hitagS settings
reset_sof = 1;
t_wait = 200;
DbpString("Configured for hitagS reader");
//DbpString("Configured for hitagS reader");
} else if (htf < 20) {
// hitag1 settings
reset_sof = 1;
t_wait = 200;
DbpString("Configured for hitag1 reader");
//DbpString("Configured for hitag1 reader");
} else if (htf < 30) {
// hitag2 settings
reset_sof = 4;
t_wait = HITAG_T_WAIT_2;
DbpString("Configured for hitag2 reader");
//DbpString("Configured for hitag2 reader");
} else {
Dbprintf("Error, unknown hitag reader type: %d",htf);
return;
}
uint8_t attempt_count=0;
while(!bStop && !BUTTON_PRESS()) {
// Watchdog hit
WDT_HIT();
@ -1272,6 +1310,11 @@ void ReaderHitag(hitag_function htf, hitag_data* htd) {
case RHT2F_TEST_AUTH_ATTEMPTS: {
bStop = !hitag2_test_auth_attempts(rx,rxlen,tx,&txlen);
} break;
case RHT2F_UID_ONLY: {
bStop = !hitag2_read_uid(rx, rxlen, tx, &txlen);
attempt_count++; //attempt 3 times to get uid then quit
if (!bStop && attempt_count == 3) bStop = true;
} break;
default: {
Dbprintf("Error, unknown function: %d",htf);
return;
@ -1381,7 +1424,7 @@ void ReaderHitag(hitag_function htf, hitag_data* htd) {
AT91C_BASE_TC1->TC_CCR = AT91C_TC_CLKDIS;
AT91C_BASE_TC0->TC_CCR = AT91C_TC_CLKDIS;
FpgaWriteConfWord(FPGA_MAJOR_MODE_OFF);
Dbprintf("frame received: %d",frame_count);
DbpString("All done");
//Dbprintf("frame received: %d",frame_count);
//DbpString("All done");
cmd_send(CMD_ACK,bSuccessful,0,0,(byte_t*)tag.sectors,48);
}