fido fix (#775)

[proxmark3-svn] / armsrc / i2c.c

diff --git a/armsrc/i2c.c b/armsrc/i2c.c
index 0560d306b508d1c6fb648da9ed75761c7e666371..7ef0c9c035ce767bfe8cd39b7f4e6a2cec021d5e 100644 (file)
--- a/armsrc/i2c.c
+++ b/armsrc/i2c.c
@@ -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);