FreeCalypso > hg > fc-sim-tools

annotate libcommon/apdu.c @ 22:f893cdde97a4

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updated top-level README added
author Mychaela Falconia <falcon@freecalypso.org>
date Sun, 14 Mar 2021 08:20:20 +0000
parents c9ef9e91dd8e
children
Ignore whitespace changes - Everywhere: Within whitespace: At end of lines:
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9
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1 #include <sys/types.h>
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2 #include <ctype.h>
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3 #include <stdio.h>
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4 #include <stdlib.h>
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5 #include <string.h>
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6 #include <strings.h>
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7
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8 extern FILE *cpipeF, *rpipeF;
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9
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10 u_char sim_resp_data[258];
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11 unsigned sim_resp_data_len, sim_resp_sw;
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12
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13 static void
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14 send_cmd(cmd_apdu, cmd_apdu_len)
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15 u_char *cmd_apdu;
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16 unsigned cmd_apdu_len;
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17 {
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18 unsigned n;
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19
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20 for (n = 0; n < cmd_apdu_len; n++)
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21 fprintf(cpipeF, "%02X", cmd_apdu[n]);
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22 putc('\n', cpipeF);
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23 fflush(cpipeF);
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24 }
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25
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26 static
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27 parse_response_hex_string(input)
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28 char *input;
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29 {
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30 char *cp;
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31
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32 sim_resp_data_len = 0;
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33 for (cp = input; *cp; cp += 2) {
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34 if (!isxdigit(cp[0]) || !isxdigit(cp[1])) {
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35 fprintf(stderr,
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36 "comm error: invalid hex string from back end\n");
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37 return(-1);
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38 }
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39 sim_resp_data[sim_resp_data_len++] =
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40 (decode_hex_digit(cp[0]) << 4) |
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41 decode_hex_digit(cp[1]);
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42 }
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43 return(0);
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44 }
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45
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46 apdu_exchange(cmd_apdu, cmd_apdu_len)
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47 u_char *cmd_apdu;
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48 unsigned cmd_apdu_len;
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49 {
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50 char inbuf[518], *cp;
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51 u_char *sw;
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52 int rc;
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53
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54 send_cmd(cmd_apdu, cmd_apdu_len);
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55 if (!fgets(inbuf, sizeof inbuf, rpipeF)) {
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56 fprintf(stderr, "comm error: EOF reading from back end\n");
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57 return(-1);
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58 }
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59 cp = index(inbuf, '\n');
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60 if (!cp) {
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61 fprintf(stderr,
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62 "comm error: response from back end has no newline\n");
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63 return(-1);
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64 }
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65 *cp = '\0';
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66 if (!inbuf[0]) {
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67 fprintf(stderr,
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68 "comm error: response from back end is an empty line\n");
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69 return(-1);
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70 }
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71 if (!isxdigit(inbuf[0]) || !isxdigit(inbuf[1]) || !isxdigit(inbuf[2])
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72 || !isxdigit(inbuf[3])) {
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73 /* we got a back end error message */
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74 fprintf(stderr, "%s\n", inbuf);
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75 return(-1);
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76 }
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77 rc = parse_response_hex_string(inbuf);
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78 if (rc < 0)
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79 return(rc);
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80 sim_resp_data_len -= 2;
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81 sw = sim_resp_data + sim_resp_data_len;
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82 sim_resp_sw = (sw[0] << 8) | sw[1];
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83 return(0);
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84 }