ykneo.c

   1 #ifdef HAVE_CONFIG_H
   2 # include "config.h"
   3 #endif
   4 #include <stdlib.h>
   5 #include <string.h>
   6 #include <alloca.h>
   7
   8 #include "token.h"
   9
  10 #define NAMEPFX "YubikeyNEO"
  11
  12 static const BYTE selcmd[] = {0x00, 0xA4, 0x04, 0x00, 0x07, 0xA0,
  13                                 0x00, 0x00, 0x05, 0x27, 0x20, 0x01, 0x00};
  14 static const BYTE cr_cmd[] = {0x00, 0x01, 0xff, 0x00};
  15
  16 static BYTE cr_for_slot[3] = {0xff, 0x30, 0x38};
  17
  18 static int slot;
  19
  20 static int ykn_parse_option(char *key, char *val)
  21 {
  22         if (!strcmp(key, "slot")) {
  23                 if (!strcmp(val, "1")) {
  24                         slot = 1;
  25                 } else if (!strcmp(val, "2")) {
  26                         slot = 2;
  27                 } else {
  28                         return -1;
  29                 }
  30         } else {
  31                 return -1;
  32         }
  33         return 0;
  34 }
  35
  36 static DWORD ykn_check_atr_hb(BYTE *str, DWORD size)
  37 {
  38         if (size < strlen(NAMEPFX)) return SCARD_W_UNSUPPORTED_CARD;
  39         if (memcmp(str, NAMEPFX, strlen(NAMEPFX)))
  40                 return SCARD_W_UNSUPPORTED_CARD;
  41         return SCARD_S_SUCCESS;
  42 }
  43
  44 static DWORD ykn_prologue(SCARDHANDLE hCard)
  45 {
  46         BYTE buf[258];
  47         DWORD rsize = sizeof(buf);
  48         DWORD rc = SCardBeginTransaction(hCard);
  49         if (rc) return rc;
  50         rc = SCardTransmit(hCard, &pioSendPci, selcmd, sizeof(selcmd),
  51                 NULL, buf, &rsize);
  52         if (rc) return rc;
  53         if ((buf[rsize-2] == 0x90) && (buf[rsize-1] == 0x00))
  54                 return SCARD_S_SUCCESS;
  55         else return SCARD_W_CARD_NOT_AUTHENTICATED;
  56 }
  57
  58 static DWORD ykn_trancieve(SCARDHANDLE hCard,
  59         BYTE *send, DWORD sendsize, BYTE *recv, LPDWORD recvsize_p)
  60 {
  61         DWORD rc;
  62         DWORD rsize = *recvsize_p + 2;
  63         BYTE *rbuf = alloca(rsize);
  64         BYTE *sbuf = alloca(sendsize + 6);
  65         memcpy(sbuf, cr_cmd, sizeof(cr_cmd));
  66         sbuf[2] = cr_for_slot[slot];
  67         sbuf[sizeof(cr_cmd)] = sendsize;
  68         memcpy(sbuf + sizeof(cr_cmd) + 1, send, sendsize);
  69         sbuf[sendsize + 5] = rsize;
  70         rc = SCardTransmit(hCard, &pioSendPci, sbuf, sendsize + 6,
  71                 NULL, rbuf, &rsize);
  72         if (rc) return rc;
  73         if ((rbuf[rsize-2] != 0x90) || (rbuf[rsize-1] != 0x00))
  74                 return SCARD_W_CARD_NOT_AUTHENTICATED;
  75         memcpy(recv, rbuf, rsize - 2);
  76         *recvsize_p = rsize - 2;
  77         return SCARD_S_SUCCESS;
  78 }
  79
  80 static DWORD ykn_epilogue(SCARDHANDLE hCard)
  81 {
  82         return SCardEndTransaction(hCard, SCARD_LEAVE_CARD);
  83 }
  84
  85 struct token_interface ykneo_interface = {
  86         .name           = "ykneo",
  87         .parse_option   = ykn_parse_option,
  88         .check_atr_hb   = ykn_check_atr_hb,
  89         .prologue       = ykn_prologue,
  90         .trancieve      = ykn_trancieve,
  91         .epilogue       = ykn_epilogue,
  92 };