?? ds8007.lst
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756 5 if ((curByte != 0x3f) && (curByte != 0x3b))
757 5 {
758 6 dssc_powerdown();
759 6 return ERR_POWERUP_ATR_INVALID;
760 6 }
761 5 check = 0;
762 5 }
763 4 else
764 4 check ^= curByte;
765 4 if (index == 2)
766 4 {
767 5 historicalBytes = curByte & 0x0F;
768 5 expectedCharacters = curByte & 0xF0;
769 5 lastATR[currentSlot].T0 = curByte;
770 5 }
771 4 if (index > 2)
772 4 {
773 5 switch(expectedCharacters)
774 5 {
775 6 case 0x00:
776 6 // Historical characters
777 6 historicalBytes--;
778 6 lastATR[currentSlot].Historical[lastATR[currentSlot].HistoricalLength++] = curByte;
779 6 if (historicalBytes == 0)
780 6 {
781 7 if (T==0)
782 7 {
783 8 done = 1;
784 8 }
785 7 else
786 7 expectedCharacters = 0x01; // Go to checksum state
787 7 }
788 6 break;
789 6 case 0x01:
790 6 // TCK case
791 6 lastATR[currentSlot].TCK = curByte;
792 6 done = 1;
793 6 break;
794 6
795 6 case 0x10:
796 6 case 0x30:
797 6 case 0x50:
798 6 case 0x70:
C51 COMPILER V8.08 DS8007 10/26/2007 09:32:25 PAGE 14
799 6 case 0x90:
800 6 case 0xB0:
801 6 case 0xD0:
802 6 case 0xF0:
803 6 // TA case
804 6 expectedCharacters &= 0xE0;
805 6 lastATR[currentSlot].TA[interfaceIteration] = curByte;
806 6 break;
807 6
808 6 case 0x20:
809 6 case 0x60:
810 6 case 0xA0:
811 6 case 0xE0:
812 6 // TB case
813 6 expectedCharacters &= 0xD0;
814 6
815 6 lastATR[currentSlot].TB[interfaceIteration] = curByte;
816 6 break;
817 6
818 6 case 0x40:
819 6 case 0xC0:
820 6 // TC case
821 6 expectedCharacters &= 0xB0;
822 6 lastATR[currentSlot].TC[interfaceIteration] = curByte;
823 6 break;
824 6
825 6 case 0x80:
826 6 // TD case
827 6 expectedCharacters=(curByte&0xF0);
828 6 // Handle zero historical characters
829 6 if ((expectedCharacters == 0x00) && (historicalBytes == 0))
830 6 {
831 7 if (T==0)
832 7 {
833 8 done = 1;
834 8 }
835 7 else
836 7 expectedCharacters = 0x01;
837 7 }
838 6 lastATR[currentSlot].TD[interfaceIteration] = curByte;
839 6 // If we get TD1, we have the first protocol selection
840 6 if ((interfaceIteration==1))
841 6 {
842 7 T=curByte & 0x0F;
843 7 }
844 6 else
845 6 {
846 7 // Changing protocols is only valid under ISO (not allowed in EMV)
847 7 if (mode == POWERUP_ISO)
848 7 {
849 8 if ((curByte & 0x0F) != T)
850 8 {
851 9 T=curByte & 0x0F;
852 9 }
853 8 }
854 7 else
855 7 return ERR_POWERUP_ATR_INVALID; // You cannot change T protocol under EMV
856 7 }
857 6 interfaceIteration++;
858 6 break;
859 6 default:
860 6 dssc_powerdown();
C51 COMPILER V8.08 DS8007 10/26/2007 09:32:25 PAGE 15
861 6 return ERR_POWERUP_ATR_INVALID;
862 6 break;
863 6 }
864 5 }
865 4
866 4 if (mode == POWERUP_ISO)
867 4 {
868 5 // Reset timer for 9600 etu between characters in ATR
869 5 dssc_writeregister(TOC,0x00);
870 5 dssc_writeregister(TOR3,0x25);
871 5 dssc_writeregister(TOR2,0x80);
872 5 dssc_writeregister(TOR1,0x00);
873 5 // Start timer
874 5 dssc_writeregister(TOC,0x61);
875 5 }
876 4 else // mode is EMV
877 4 {
878 5 // Set up timer for 9600 etu between characters in ATR
879 5 // Don't modify TOR1 as it is in auto-reload mode.
880 5 dssc_writeregister(TOC,0x05);
881 5 dssc_writeregister(TOR3,0x25);
882 5 dssc_writeregister(TOR2,0x80);
883 5
884 5 // Start timer
885 5 dssc_writeregister(TOC,0x65);
886 5 }
887 4 }
888 3 }
889 2
890 2 // Read Timer status
891 2 if (USRval & USR_TOL3_MASK)
892 2 {
893 3 dssc_powerdown();
894 3 return ERR_POWERUP_ATR_TIMEOUT;
895 3 }
896 2 if ((mode == POWERUP_EMV) && (USRval & USR_TOL1_MASK))
897 2 {
898 3 // If 192 ETU rollover, increment total count
899 3 etucount++;
900 3 // If we exceed 192 * 100 or 19200 etu, we fail as the whole ATR has not come
901 3 if (etucount > 100)
902 3 {
903 4 dssc_powerdown();
904 4 return ERR_POWERUP_ATR_TIMEOUT;
905 4 }
906 3 }
907 2 }
908 1
909 1 // If we are in T=1 protocol, we get a LRC (xor checksum) at the end
910 1 if (T==1)
911 1 {
912 2 if (check != 0)
913 2 {
914 3 dssc_powerdown();
915 3 return ERR_POWERUP_ATR_CRC_FAILURE;
916 3 }
917 2 }
918 1
919 1 // Set ATR length for the ATR received
920 1 ATRLength[currentSlot] = index;
921 1 // Set T protocol mode
922 1 TMode[currentSlot] = T;
C51 COMPILER V8.08 DS8007 10/26/2007 09:32:25 PAGE 16
923 1
924 1 // Set the DS8007 UCR1.PROT mode according to T value
925 1 val = dssc_readregister(UCR1);
926 1 if (T == 0)
927 1 dssc_writeregister(UCR1,val & ~UCR1_PROT_MASK);
928 1 else
929 1 dssc_writeregister(UCR1,val | UCR1_PROT_MASK);
930 1
931 1 // Set extra guard time if present in TC1, else use guard time of 0
932 1 if (lastATR[currentSlot].TC[1] != -1)
933 1 dssc_writeregister(GTR,lastATR[currentSlot].TC[1]);
934 1 else
935 1 dssc_writeregister(GTR,0x00);
936 1
937 1 // Set the EDC type (either LRC or CRC)
938 1 EDCtype[currentSlot] = EDC_TYPE_LRC; // Default to LRC if not told otherwise.
939 1 for (i = 3;i < 8;i++)
940 1 {
941 2 if (lastATR[currentSlot].TC[3] != -1)
942 2 {
943 3 EDCtype[currentSlot] = (lastATR[currentSlot].TC[3] & 0x01)?EDC_TYPE_CRC:EDC_TYPE_LRC;
944 3 }
945 2 }
946 1
947 1 // Set IFSC (max segment size of card) if TA3 present (only used for T=1 protocol)
948 1 if (lastATR[currentSlot].TA[3] != -1)
949 1 {
950 2 val = lastATR[currentSlot].TA[3];
951 2 if ((val < 0x10) || (val == 0xFF))
952 2 {
953 3 dssc_powerdown();
954 3 return ERR_POWERUP_ATR_INVALID;
955 3 }
956 2 IFSC[currentSlot] = val;
957 2 }
958 1 else
959 1 IFSC[currentSlot] = 0x20; // Default for IFSC is 0x20 according to EMV 4.1 8.3.3.9 and ISO7816 9.5.2.1
960 1
961 1 // Set WWT if present in TC2 (only used for T=0), ISO7816 8.2
962 1 if (lastATR[currentSlot].TC[2] != -1)
963 1 WWT[currentSlot] = lastATR[currentSlot].TC[2] * 960;
964 1 else
965 1 WWT[currentSlot] = 960 * 10;
966 1
967 1 if (mode == POWERUP_EMV)
968 1 {
969 2 if (lastATR[currentSlot].TB[3] == -1)
970 2 {
971 3 dssc_powerdown();
972 3 return ERR_POWERUP_ATR_INVALID;
973 3 }
974 2 else
975 2 {
976 3 val = lastATR[currentSlot].TB[i] & 0x0F;
977 3 // Fail if CWI is out of range
978 3 if (val > 5)
979 3 {
980 4 dssc_powerdown();
981 4 return ERR_POWERUP_ATR_INVALID;
982 4 }
983 3 val = (lastATR[currentSlot].TB[i] & 0x0F) >> 4;
984 3 // Fail if BWI is out of range
C51 COMPILER V8.08 DS8007 10/26/2007 09:32:25 PAGE 17
985 3 if (val > 4)
986 3 {
987 4 dssc_powerdown();
988 4 return ERR_POWERUP_ATR_INVALID;
989 4 }
990 3 }
991 2 }
992 1
993 1 // Set default values for CWT and BWT, ISO7816 9.5.3.1 and 9.5.3.2
994 1 CWT[currentSlot] = 11 + (1 << 13);
995 1 BWT[currentSlot] = 11 + (1 << 4) * 960;
996 1 for (i = 3;i < 8;i++)
997 1 {
998 2 // Set CWT and BWT if present in TBi
999 2 if (lastATR[currentSlot].TB[i] != -1)
1000 2 {
1001 3 val = lastATR[currentSlot].TB[i] & 0x0F;
1002 3 CWT[currentSlot] = 11 + (1 << val);
1003 3 val = (lastATR[currentSlot].TB[i] & 0x0F) >> 4;
1004 3 if (val > 9)
1005 3 {
1006 4 dssc_powerdown();
1007 4 return ERR_POWERUP_ATR_INVALID;
1008 4 }
1009 3 BWT[currentSlot] = 11 + (1 << val) * 960;
1010 3 break;
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