/* $Id: scrw.c,v 1.6 2001/07/20 15:51:45 rees Exp $ */ /* copyright 1997, 1999, 2000 the regents of the university of michigan all rights reserved permission is granted to use, copy, create derivative works and redistribute this software and such derivative works for any purpose, so long as the name of the university of michigan is not used in any advertising or publicity pertaining to the use or distribution of this software without specific, written prior authorization. if the above copyright notice or any other identification of the university of michigan is included in any copy of any portion of this software, then the disclaimer below must also be included. this software is provided as is, without representation from the university of michigan as to its fitness for any purpose, and without warranty by the university of michigan of any kind, either express or implied, including without limitation the implied warranties of merchantability and fitness for a particular purpose. the regents of the university of michigan shall not be liable for any damages, including special, indirect, incidental, or consequential damages, with respect to any claim arising out of or in connection with the use of the software, even if it has been or is hereafter advised of the possibility of such damages. */ /* * OS independent part * * Jim Rees, University of Michigan, October 1997 */ #ifdef __palmos__ #include #include #include #include #include #include #include "field.h" #else #include #include #endif #ifdef SCPERF #define SCPERF_FIRST_APPEARANCE #endif /* SCPERF */ #include "sectok.h" #include "sc7816.h" #include "todos_scrw.h" /* external variable */ #ifdef BYTECOUNT extern int num_getc, num_putc; #endif /* BYTECOUNT */ struct scparam scparam[4]; /* reset the card, and return answer to reset (atr) */ int todos_scxreset(int ttyn, int flags, unsigned char *atr, int *ep) { unsigned char buf[33]; int n, err; if (ep) *ep = SCEOK; else ep = &err; if (!todos_sccardpresent(ttyn)) { *ep = SCENOCARD; return 0; } if (!atr) atr = buf; if (!(flags & SCRTODOS) && (todos_scsetflags(ttyn, 0, 0) & SCOXDTR)) flags |= SCRTODOS; todos_scsetspeed(ttyn, 9600); todos_scsetflags(ttyn, 0, SCOINVRT); if (todos_scdtr(ttyn, (flags & SCRTODOS)) < 0) { *ep = SCENOCARD; return 0; } /* 7816-3 sec 5.2 says >= 40000 clock cycles, ~=12 msec */ scsleep(20); todos_scdtr(ttyn, !(flags & SCRTODOS)); n = todos_get_atr(ttyn, flags, atr, &scparam[ttyn]); if (!n && ep) *ep = SCESLAG; if (scparam[ttyn].t < 0 && ep) *ep = SCENOSUPP; return n; } static int todos_scioproc(int ttyn, int io, unsigned char *cp) { int code; /* Wait extra guard time if needed */ if (!io && scparam[ttyn].n) scsleep(((scparam[ttyn].n * scparam[ttyn].etu) + 999) / 1000); code = (!io ? scputc(ttyn, *cp) : scgetc(ttyn, cp, scparam[ttyn].cwt)); return code; } /* This does the real work of transferring data to or from the card. Since the ack handling is the same for both send and receive, we do it all here. */ static int todos_scioT0(int ttyn, int io, int cla, int ins, int p1, int p2, int p3, unsigned char *buf, int *sw1p, int *sw2p) { int n = 0, ack, ackxins; unsigned char *bp = buf, c, apdu[5]; #ifdef BYTECOUNT int tmp_num_getc, tmp_num_putc; #endif /* BYTECOUNT */ #ifdef BYTECOUNT tmp_num_getc = num_getc; tmp_num_putc = num_putc; #endif /* BYTECOUNT */ #ifdef SCPERF SetTime("SCIO starts"); #endif /* SCPERF */ #ifdef DEBUG printf("scioT0 %3s %02x %02x %02x %02x %02x\n", io ? "out" : "in", cla, ins, p1, p2, p3); #endif apdu[0] = cla; apdu[1] = ins; apdu[2] = p1; apdu[3] = p2; apdu[4] = p3; scputblk(ttyn, apdu, 5); #ifdef SCPERF SetTime("Finish sending APDU"); #endif /* SCPERF */ while (1) { /* read ack byte; see 7816-3 8.2.2 */ if (scgetc(ttyn, &c, scparam[ttyn].cwt) != SCEOK) { #ifdef DEBUG printf("%d ms timeout reading ack\n", scparam[ttyn].cwt); #endif return -1; } ack = c; if (ack == 0x60) { /* null (no-op but resets timer) */ #ifdef DEBUG printf("got 0x60 (null) ack; reset timer\n"); #endif continue; } if ((ack & 0xf0) == 0x60 || (ack & 0xf0) == 0x90) { /* SW1; get SW2 and return */ *sw1p = ack; if (scgetc(ttyn, &c, scparam[ttyn].cwt) != SCEOK) { #ifdef DEBUG printf("%d ms timeout reading sw2\n", scparam[ttyn].cwt); #endif return -1; } *sw2p = (c & 0xff); break; } /* we would set VPP here if the interface supported it */ ackxins = (ack ^ ins) & 0xfe; if (ackxins == 0xfe) { if (n < p3) { /* xfer next data byte */ if (todos_scioproc(ttyn, io, bp++) != SCEOK) { #ifdef DEBUG printf("%d ms timeout reading next data byte\n", scparam[ttyn].cwt); #endif return -1; } n++; } } else if (ackxins == 0) { /* xfer all remaining data bytes */ while (n < p3) { if (todos_scioproc(ttyn, io, bp++) != SCEOK) { #ifdef DEBUG printf("%d ms timeout reading all remaining data bytes\n", scparam[ttyn].cwt); #endif return -1; } n++; } #ifdef SCPERF SetTime("Finish sending or receiving DATA"); #endif /* SCPERF */ } else { /* ?? unknown ack byte */ #ifdef DEBUG printf("unknown ack %x\n", ack); continue; #else return -1; #endif } } #ifdef SCPERF SetTime("Finish scio"); #endif /* SCPERF */ #ifdef BYTECOUNT tmp_num_putc = num_putc - tmp_num_putc; tmp_num_getc = num_getc - tmp_num_getc - tmp_num_putc; MESSAGE3("#getc=%d, #putc=%d\n", tmp_num_getc, tmp_num_putc); #endif /* BYTECOUNT */ return n; } int todos_scrw(int ttyn, int cla, int ins, int p1, int p2, int ilen, unsigned char *ibuf, int olen, unsigned char *obuf, int *sw1p, int *sw2p) { int r; if (scparam[ttyn].t == 0) { if (ilen > 0 && ibuf) { /* Send "in" data */ r = (todos_scioT0(ttyn, 0, cla, ins, p1, p2, ilen, ibuf, sw1p, sw2p) >= 0) ? 0 : -1; if (r >= 0 && *sw1p == 0x61 && olen >= *sw2p && obuf) { /* Response available; get it */ r = todos_scioT0(ttyn, 1, cla, 0xc0, 0, 0, *sw2p, obuf, sw1p, sw2p); } } else { /* Get "out" data */ r = todos_scioT0(ttyn, 1, cla, ins, p1, p2, olen, obuf, sw1p, sw2p); } #ifndef NO_T_EQ_1 } else if (scparam[ttyn].t == 1) { r = scioT1(ttyn, cla, ins, p1, p2, ilen, ibuf, olen, obuf, sw1p, sw2p); #endif } else r = -1; return r; }