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retrieve uid correctly, patched by 'gregy'

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roel@libnfc.org 2013-05-03 06:58:24 +00:00
parent 90d74dc206
commit ed258538da
1 changed files with 46 additions and 47 deletions
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91
armsrc/iso14443a.c
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@ -1599,26 +1599,26 @@ int ReaderReceivePar(uint8_t* receivedAnswer, uint32_t * parptr)
* fills the uid pointer unless NULL
* fills resp_data unless NULL */
int iso14443a_select_card(byte_t* uid_ptr, iso14a_card_select_t* p_hi14a_card, uint32_t* cuid_ptr) {
uint8_t wupa[] = { 0x52 }; // 0x26 - REQA 0x52 - WAKE-UP
uint8_t sel_all[] = { 0x93,0x20 };
uint8_t sel_uid[] = { 0x93,0x70,0x00,0x00,0x00,0x00,0x00,0x00,0x00 };
uint8_t rats[] = { 0xE0,0x80,0x00,0x00 }; // FSD=256, FSDI=8, CID=0
uint8_t* resp = (((uint8_t *)BigBuf) + FREE_BUFFER_OFFSET); // was 3560 - tied to other size changes
uint8_t wupa[] = { 0x52 }; // 0x26 - REQA 0x52 - WAKE-UP
uint8_t sel_all[] = { 0x93,0x20 };
uint8_t sel_uid[] = { 0x93,0x70,0x00,0x00,0x00,0x00,0x00,0x00,0x00 };
uint8_t rats[] = { 0xE0,0x80,0x00,0x00 }; // FSD=256, FSDI=8, CID=0
uint8_t* resp = (((uint8_t *)BigBuf) + FREE_BUFFER_OFFSET); // was 3560 - tied to other size changes
byte_t uid_resp[4];
size_t uid_resp_len;
uint8_t sak = 0x04; // cascade uid
int cascade_level = 0;
int len;
uint8_t sak = 0x04; // cascade uid
int cascade_level = 0;
int len;
// Broadcast for a card, WUPA (0x52) will force response from all cards in the field
// Broadcast for a card, WUPA (0x52) will force response from all cards in the field
ReaderTransmitBitsPar(wupa,7,0);
// Receive the ATQA
if(!ReaderReceive(resp)) return 0;
// Receive the ATQA
if(!ReaderReceive(resp)) return 0;
// Dbprintf("atqa: %02x %02x",resp[0],resp[1]);
if(p_hi14a_card) {
memcpy(p_hi14a_card->atqa, resp, 2);
if(p_hi14a_card) {
memcpy(p_hi14a_card->atqa, resp, 2);
p_hi14a_card->uidlen = 0;
memset(p_hi14a_card->uid,0,10);
}
@ -1628,17 +1628,16 @@ int iso14443a_select_card(byte_t* uid_ptr, iso14a_card_select_t* p_hi14a_card, u
memset(uid_ptr,0,10);
}
// OK we will select at least at cascade 1, lets see if first byte of UID was 0x88 in
// which case we need to make a cascade 2 request and select - this is a long UID
// While the UID is not complete, the 3nd bit (from the right) is set in the SAK.
for(; sak & 0x04; cascade_level++)
{
// SELECT_* (L1: 0x93, L2: 0x95, L3: 0x97)
sel_uid[0] = sel_all[0] = 0x93 + cascade_level * 2;
// OK we will select at least at cascade 1, lets see if first byte of UID was 0x88 in
// which case we need to make a cascade 2 request and select - this is a long UID
// While the UID is not complete, the 3nd bit (from the right) is set in the SAK.
for(; sak & 0x04; cascade_level++) {
// SELECT_* (L1: 0x93, L2: 0x95, L3: 0x97)
sel_uid[0] = sel_all[0] = 0x93 + cascade_level * 2;
// SELECT_ALL
ReaderTransmit(sel_all,sizeof(sel_all));
if (!ReaderReceive(resp)) return 0;
// SELECT_ALL
ReaderTransmit(sel_all,sizeof(sel_all));
if (!ReaderReceive(resp)) return 0;
// First backup the current uid
memcpy(uid_resp,resp,4);
@ -1650,20 +1649,20 @@ int iso14443a_select_card(byte_t* uid_ptr, iso14a_card_select_t* p_hi14a_card, u
*cuid_ptr = bytes_to_num(uid_resp, 4);
}
// Construct SELECT UID command
// Construct SELECT UID command
memcpy(sel_uid+2,resp,5);
AppendCrc14443a(sel_uid,7);
ReaderTransmit(sel_uid,sizeof(sel_uid));
AppendCrc14443a(sel_uid,7);
ReaderTransmit(sel_uid,sizeof(sel_uid));
// Receive the SAK
if (!ReaderReceive(resp)) return 0;
sak = resp[0];
// Receive the SAK
if (!ReaderReceive(resp)) return 0;
sak = resp[0];
// Test if more parts of the uid are comming
if ((sak & 0x04) && uid_resp[0] == 0x88) {
// Remove first byte, 0x88 is not an UID byte, it CT, see page 3 of:
// http://www.nxp.com/documents/application_note/AN10927.pdf
memcpy(uid_ptr, uid_ptr + 1, 3);
memcpy(uid_resp, uid_resp + 1, 3);
uid_resp_len = 3;
}
@ -1675,31 +1674,31 @@ int iso14443a_select_card(byte_t* uid_ptr, iso14a_card_select_t* p_hi14a_card, u
memcpy(p_hi14a_card->uid + (cascade_level*3), uid_resp, uid_resp_len);
p_hi14a_card->uidlen += uid_resp_len;
}
}
if(p_hi14a_card) {
p_hi14a_card->sak = sak;
p_hi14a_card->ats_len = 0;
}
if( (sak & 0x20) == 0) {
return 2; // non iso14443a compliant tag
}
// Request for answer to select
if(p_hi14a_card) {
p_hi14a_card->sak = sak;
p_hi14a_card->ats_len = 0;
}
if( (sak & 0x20) == 0) {
return 2; // non iso14443a compliant tag
}
// Request for answer to select
AppendCrc14443a(rats, 2);
ReaderTransmit(rats, sizeof(rats));
if (!(len = ReaderReceive(resp))) return 0;
if(p_hi14a_card) {
memcpy(p_hi14a_card->ats, resp, sizeof(p_hi14a_card->ats));
p_hi14a_card->ats_len = len;
}
memcpy(p_hi14a_card->ats, resp, sizeof(p_hi14a_card->ats));
p_hi14a_card->ats_len = len;
}
// reset the PCB block number
iso14_pcb_blocknum = 0;
return 1;
// reset the PCB block number
iso14_pcb_blocknum = 0;
return 1;
}
void iso14443a_setup() {