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Add support for standard USB Smartcard Readers (#765)

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* add PCSC interface (pcsc.c and pcsc.h)
* new command 'sc select' to choose an USB Smartcard Reader
* updated CI/.travis.yml accordingly
* remove TCK CRC check in i2c.c It is done in PrintATR() anyway
* Fix TCK CRC check in PrintATR()
* Add PCSC reader support to 'sc info'
This commit is contained in:
pwpiwi 2019-01-28 21:54:34 +01:00 • committed by GitHub
commit a9104f7e31
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14 changed files with 382 additions and 93 deletions
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22
armsrc/i2c.c
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@ -656,28 +656,6 @@ static bool GetATR(smart_card_atr_t *card_ptr) {
if ( !sc_rx_bytes(card_ptr->atr, &len) )
return false;
uint8_t pos_td = 1;
if ( (card_ptr->atr[1] & 0x10) == 0x10) pos_td++;
if ( (card_ptr->atr[1] & 0x20) == 0x20) pos_td++;
if ( (card_ptr->atr[1] & 0x40) == 0x40) pos_td++;
// T0 indicate presence T=0 vs T=1. T=1 has checksum TCK
if ( (card_ptr->atr[1] & 0x80) == 0x80) {
pos_td++;
// 1 == T1 , presence of checksum TCK
if ( (card_ptr->atr[pos_td] & 0x01) == 0x01) {
uint8_t chksum = 0;
// xor property. will be zero when xored with chksum.
for (uint8_t i = 1; i < len; ++i)
chksum ^= card_ptr->atr[i];
if ( chksum ) {
if ( MF_DBGLEVEL > 2) DbpString("Wrong ATR checksum");
}
}
}
card_ptr->atr_len = len;
LogTrace(card_ptr->atr, card_ptr->atr_len, 0, 0, NULL, false);