FreeCalypso > hg > fc-sim-tools

annotate serial/collect_atr.c @ 93:6041c601304d

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fcsim1-mkprov: revert OTA key addition It appears that GrcardSIM2 cards (which is what we got for FCSIM1) do not support OTA after all, contrary to what we were previously led to believe by some tech support emails from Grcard - apparently those support emails and OTA descriptions referred to some other card model(s).
author Mychaela Falconia <falcon@freecalypso.org>
date Wed, 21 Apr 2021 05:38:39 +0000
parents 1d96f3b4f155
children
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38
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1 /*
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2 * This module contains the code for collecting ATR bytes from the SIM,
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3 * as well as subsequent byte Rx.
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4 */
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5
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6 #include <sys/types.h>
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7 #include <sys/time.h>
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8 #include <sys/errno.h>
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9 #include <stdio.h>
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10 #include <stdlib.h>
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11 #include <unistd.h>
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12
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13 extern int target_fd;
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14
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15 #define MAX_ATR_BYTES 33
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16
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17 extern unsigned char inverse_coding_table[256];
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18
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19 u_char atr_buf[MAX_ATR_BYTES];
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20 unsigned atr_length;
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21 int inverse_coding;
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22
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23 void
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24 invert_bytes(buf, nbytes)
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25 u_char *buf;
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26 unsigned nbytes;
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27 {
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28 unsigned n;
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29
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30 for (n = 0; n < nbytes; n++)
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31 buf[n] = inverse_coding_table[buf[n]];
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32 }
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33
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34 collect_bytes_from_sim(buf, expect_len)
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35 u_char *buf;
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36 unsigned expect_len;
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37 {
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38 fd_set fds;
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39 struct timeval tv;
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40 unsigned rcvd;
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41 int cc;
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42
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43 for (rcvd = 0; rcvd < expect_len; ) {
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44 FD_ZERO(&fds);
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45 FD_SET(target_fd, &fds);
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46 tv.tv_sec = 2;
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47 tv.tv_usec = 0;
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48 cc = select(target_fd+1, &fds, NULL, NULL, &tv);
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49 if (cc < 0) {
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50 if (errno == EINTR)
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51 continue;
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52 perror("select");
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53 return(-1);
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54 }
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55 if (cc < 1) {
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56 fprintf(stderr,
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57 "error: timeout waiting for byte(s) from SIM\n");
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58 return(-1);
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59 }
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60 cc = read(target_fd, buf + rcvd, expect_len - rcvd);
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61 if (cc <= 0) {
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62 perror("read after successful select");
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63 return(-1);
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64 }
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65 rcvd += cc;
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66 }
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67 if (inverse_coding)
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68 invert_bytes(buf, rcvd);
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69 return(0);
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70 }
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71
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72 check_atr_tck()
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73 {
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74 unsigned b, p;
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75
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76 b = 0;
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77 for (p = 1; p < atr_length; p++)
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78 b ^= atr_buf[p];
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79 if (b) {
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80 fprintf(stderr, "error: ATR checksum is bad\n");
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81 return(-1);
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82 }
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83 return(0);
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84 }
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85
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86 collect_atr()
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87 {
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88 int rc;
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89 unsigned count, y, nhist, have_tck;
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90
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91 rc = collect_bytes_from_sim(atr_buf, 2);
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92 if (rc < 0)
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93 return(rc);
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94 if (atr_buf[0] == 0x3B) {
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95 /* direct convention */
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96 } else if (atr_buf[0] == 0x03) {
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97 /* inverse convention */
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98 inverse_coding = 1;
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99 atr_buf[0] = 0x3F;
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100 atr_buf[1] = inverse_coding_table[atr_buf[1]];
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101 } else {
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102 fprintf(stderr,
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103 "error: received TS=0x%02X, matches neither convention\n",
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104 atr_buf[0]);
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105 return(-1);
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106 }
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107 atr_length = 2;
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108 nhist = atr_buf[1] & 0x0F;
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109 y = atr_buf[1] & 0xF0;
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110 have_tck = 0;
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111 while (y) {
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112 count = 0;
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113 if (y & 0x10)
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114 count++;
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115 if (y & 0x20)
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116 count++;
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117 if (y & 0x40)
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118 count++;
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119 if (y & 0x80)
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120 count++;
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121 if (atr_length + count > MAX_ATR_BYTES) {
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122 atr_too_long: fprintf(stderr, "error: ATR exceeds 33 byte limit\n");
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123 return(-1);
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124 }
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125 rc = collect_bytes_from_sim(atr_buf + atr_length, count);
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126 if (rc < 0)
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127 return(rc);
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128 atr_length += count;
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129 if (y & 0x80) {
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130 y = atr_buf[atr_length-1] & 0xF0;
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diff changeset
131 if (atr_buf[atr_length-1] & 0x0F)
1d96f3b4f155 serial: started with fcsim-serial-atr
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
132 have_tck = 1;
1d96f3b4f155 serial: started with fcsim-serial-atr
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
133 } else
1d96f3b4f155 serial: started with fcsim-serial-atr
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
134 y = 0;
1d96f3b4f155 serial: started with fcsim-serial-atr
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
135 }
1d96f3b4f155 serial: started with fcsim-serial-atr
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
136 count = nhist + have_tck;
1d96f3b4f155 serial: started with fcsim-serial-atr
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
137 if (count) {
1d96f3b4f155 serial: started with fcsim-serial-atr
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
138 if (atr_length + count > MAX_ATR_BYTES)
1d96f3b4f155 serial: started with fcsim-serial-atr
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
139 goto atr_too_long;
1d96f3b4f155 serial: started with fcsim-serial-atr
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
140 rc = collect_bytes_from_sim(atr_buf + atr_length, count);
1d96f3b4f155 serial: started with fcsim-serial-atr
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
141 if (rc < 0)
1d96f3b4f155 serial: started with fcsim-serial-atr
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
142 return(rc);
1d96f3b4f155 serial: started with fcsim-serial-atr
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
143 atr_length += count;
1d96f3b4f155 serial: started with fcsim-serial-atr
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
144 }
1d96f3b4f155 serial: started with fcsim-serial-atr
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
145 if (have_tck)
1d96f3b4f155 serial: started with fcsim-serial-atr
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
146 return check_atr_tck();
1d96f3b4f155 serial: started with fcsim-serial-atr
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
147 else
1d96f3b4f155 serial: started with fcsim-serial-atr
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
148 return 0;
1d96f3b4f155 serial: started with fcsim-serial-atr
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
149 }
1d96f3b4f155 serial: started with fcsim-serial-atr
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
150
1d96f3b4f155 serial: started with fcsim-serial-atr
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
151 void
1d96f3b4f155 serial: started with fcsim-serial-atr
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
152 print_atr(head)
1d96f3b4f155 serial: started with fcsim-serial-atr
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
153 char *head;
1d96f3b4f155 serial: started with fcsim-serial-atr
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
154 {
1d96f3b4f155 serial: started with fcsim-serial-atr
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
155 unsigned n;
1d96f3b4f155 serial: started with fcsim-serial-atr
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
156
1d96f3b4f155 serial: started with fcsim-serial-atr
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
157 fputs(head, stdout);
1d96f3b4f155 serial: started with fcsim-serial-atr
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
158 for (n = 0; n < atr_length; n++) {
1d96f3b4f155 serial: started with fcsim-serial-atr
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
159 printf(" %02X", atr_buf[n]);
1d96f3b4f155 serial: started with fcsim-serial-atr
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
160 }
1d96f3b4f155 serial: started with fcsim-serial-atr
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
161 putchar('\n');
1d96f3b4f155 serial: started with fcsim-serial-atr
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
162 }