FreeCalypso > hg > fc-sim-tools

annotate serial/exchange.c @ 43:be27d1c85861

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serial: main function implemented
author Mychaela Falconia <falcon@freecalypso.org>
date Sat, 20 Mar 2021 21:49:59 +0000
parents
children
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43
be27d1c85861 serial: main function implemented
Mychaela Falconia <falcon@freecalypso.org>
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1 /*
be27d1c85861 serial: main function implemented
Mychaela Falconia <falcon@freecalypso.org>
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2 * This module implements the main function of our back end:
be27d1c85861 serial: main function implemented
Mychaela Falconia <falcon@freecalypso.org>
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3 * exchanging APDUs with the SIM.
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4 */
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5
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6 #include <sys/types.h>
be27d1c85861 serial: main function implemented
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7 #include <stdio.h>
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8
be27d1c85861 serial: main function implemented
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9 static
be27d1c85861 serial: main function implemented
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10 collect_one_byte()
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11 {
be27d1c85861 serial: main function implemented
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12 u_char buf;
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13 int rc;
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14
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15 rc = collect_bytes_from_sim(&buf, 1);
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16 if (rc < 0)
be27d1c85861 serial: main function implemented
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17 return rc;
be27d1c85861 serial: main function implemented
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18 else
be27d1c85861 serial: main function implemented
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19 return buf;
be27d1c85861 serial: main function implemented
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20 }
be27d1c85861 serial: main function implemented
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21
be27d1c85861 serial: main function implemented
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22 static void
be27d1c85861 serial: main function implemented
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23 finish_sw(sw1, data, datalen)
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24 unsigned sw1, datalen;
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25 u_char *data;
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26 {
be27d1c85861 serial: main function implemented
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27 unsigned sw2, n;
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28 int rc;
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29
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30 rc = collect_one_byte();
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31 if (rc < 0) {
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32 printf("back end error at SW2 Rx step\n");
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33 return;
be27d1c85861 serial: main function implemented
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34 }
be27d1c85861 serial: main function implemented
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35 sw2 = rc;
be27d1c85861 serial: main function implemented
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36 for (n = 0; n < datalen; n++)
be27d1c85861 serial: main function implemented
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37 printf("%02X", data[n]);
be27d1c85861 serial: main function implemented
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38 printf("%02X%02X\n", sw1, sw2);
be27d1c85861 serial: main function implemented
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39 }
be27d1c85861 serial: main function implemented
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40
be27d1c85861 serial: main function implemented
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41 static void
be27d1c85861 serial: main function implemented
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42 exchange_data_out(ins, data, datalen)
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43 unsigned ins, datalen;
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44 u_char *data;
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45 {
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46 int rc;
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47 unsigned null_count, bytes_sent, ack, ack1;
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48
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49 ack = ins & 0xFE;
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50 ack1 = ~ins & 0xFE;
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51 bytes_sent = 0;
be27d1c85861 serial: main function implemented
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52 null_count = 0;
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53 for (;;) {
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54 rc = collect_one_byte();
be27d1c85861 serial: main function implemented
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55 if (rc < 0) {
be27d1c85861 serial: main function implemented
Mychaela Falconia <falcon@freecalypso.org>
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56 printf("back end error at procedure byte step\n");
be27d1c85861 serial: main function implemented
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57 return;
be27d1c85861 serial: main function implemented
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58 }
be27d1c85861 serial: main function implemented
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59 if (rc == 0x60) {
be27d1c85861 serial: main function implemented
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60 null_count++;
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61 if (null_count >= 32) {
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62 printf(
be27d1c85861 serial: main function implemented
Mychaela Falconia <falcon@freecalypso.org>
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63 "ERROR: too many stalling NULL bytes received from SIM\n");
be27d1c85861 serial: main function implemented
Mychaela Falconia <falcon@freecalypso.org>
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64 return;
be27d1c85861 serial: main function implemented
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65 }
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66 continue;
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67 }
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68 if ((rc & 0xF0) == 0x60 || (rc & 0xF0) == 0x90) {
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69 finish_sw(rc, 0, 0);
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70 return;
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71 }
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72 if ((rc & 0xFE) == ack) {
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Mychaela Falconia <falcon@freecalypso.org>
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73 if (bytes_sent >= datalen) {
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74 bad_xfer_req: printf(
be27d1c85861 serial: main function implemented
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75 "ERROR: SIM requests more xfer after we sent everything\n");
be27d1c85861 serial: main function implemented
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76 return;
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77 }
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78 rc = send_bytes_to_sim(data + bytes_sent,
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79 datalen - bytes_sent);
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80 if (rc < 0) {
be27d1c85861 serial: main function implemented
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81 printf("back end error at data output step\n");
be27d1c85861 serial: main function implemented
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82 return;
be27d1c85861 serial: main function implemented
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83 }
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84 bytes_sent = datalen;
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85 continue;
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86 }
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87 if ((rc & 0xFE) == ack1) {
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88 if (bytes_sent >= datalen)
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89 goto bad_xfer_req;
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90 rc = send_bytes_to_sim(data + bytes_sent, 1);
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91 if (rc < 0) {
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92 printf("back end error at data output step\n");
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93 return;
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94 }
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95 bytes_sent++;
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96 continue;
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97 }
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98 printf("ERROR: non-understood procedure byte %02X\n", rc);
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99 return;
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100 }
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101 }
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102
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103 static void
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104 exchange_data_in(ins, datalen)
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105 unsigned ins, datalen;
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106 {
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107 int rc;
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108 unsigned null_count, bytes_rcvd, ack, ack1;
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109 u_char data[256];
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110
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111 if (!datalen)
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112 datalen = 256;
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113 ack = ins & 0xFE;
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114 ack1 = ~ins & 0xFE;
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Mychaela Falconia <falcon@freecalypso.org>
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115 bytes_rcvd = 0;
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116 null_count = 0;
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117 for (;;) {
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118 rc = collect_one_byte();
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Mychaela Falconia <falcon@freecalypso.org>
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119 if (rc < 0) {
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120 printf("back end error at procedure byte step\n");
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121 return;
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122 }
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123 if (rc == 0x60) {
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124 null_count++;
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125 if (null_count >= 32) {
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126 printf(
be27d1c85861 serial: main function implemented
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127 "ERROR: too many stalling NULL bytes received from SIM\n");
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Mychaela Falconia <falcon@freecalypso.org>
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128 return;
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Mychaela Falconia <falcon@freecalypso.org>
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129 }
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130 continue;
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Mychaela Falconia <falcon@freecalypso.org>
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131 }
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Mychaela Falconia <falcon@freecalypso.org>
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132 if ((rc & 0xF0) == 0x60 || (rc & 0xF0) == 0x90) {
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Mychaela Falconia <falcon@freecalypso.org>
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133 finish_sw(rc, data, bytes_rcvd);
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134 return;
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135 }
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136 if ((rc & 0xFE) == ack) {
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Mychaela Falconia <falcon@freecalypso.org>
parents:
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137 if (bytes_rcvd >= datalen) {
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Mychaela Falconia <falcon@freecalypso.org>
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138 bad_xfer_req: printf(
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Mychaela Falconia <falcon@freecalypso.org>
parents:
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139 "ERROR: SIM requests more xfer after we received all expected data\n");
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Mychaela Falconia <falcon@freecalypso.org>
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140 return;
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141 }
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142 rc = collect_bytes_from_sim(data + bytes_rcvd,
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143 datalen - bytes_rcvd);
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144 if (rc < 0) {
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Mychaela Falconia <falcon@freecalypso.org>
parents:
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145 printf("back end error at data input step\n");
be27d1c85861 serial: main function implemented
Mychaela Falconia <falcon@freecalypso.org>
parents:
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146 return;
be27d1c85861 serial: main function implemented
Mychaela Falconia <falcon@freecalypso.org>
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147 }
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Mychaela Falconia <falcon@freecalypso.org>
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148 bytes_rcvd = datalen;
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149 continue;
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Mychaela Falconia <falcon@freecalypso.org>
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150 }
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parents:
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151 if ((rc & 0xFE) == ack1) {
be27d1c85861 serial: main function implemented
Mychaela Falconia <falcon@freecalypso.org>
parents:
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152 if (bytes_rcvd >= datalen)
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153 goto bad_xfer_req;
be27d1c85861 serial: main function implemented
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154 rc = collect_one_byte();
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Mychaela Falconia <falcon@freecalypso.org>
parents:
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155 if (rc < 0) {
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Mychaela Falconia <falcon@freecalypso.org>
parents:
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156 printf("back end error at data input step\n");
be27d1c85861 serial: main function implemented
Mychaela Falconia <falcon@freecalypso.org>
parents:
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157 return;
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158 }
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159 data[bytes_rcvd++] = rc;
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160 continue;
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161 }
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162 printf("ERROR: non-understood procedure byte %02X\n", rc);
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163 return;
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164 }
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165 }
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166
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167 void
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168 apdu_exchange(cmd_apdu, cmd_apdu_len)
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169 u_char *cmd_apdu;
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170 unsigned cmd_apdu_len;
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171 {
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172 int rc;
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173
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174 rc = send_bytes_to_sim(cmd_apdu, 5);
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175 if (rc < 0) {
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176 printf("back end error at the command sending step\n");
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177 return;
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178 }
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179 if (cmd_apdu_len > 5)
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180 exchange_data_out(cmd_apdu[1], cmd_apdu + 5, cmd_apdu_len - 5);
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181 else
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182 exchange_data_in(cmd_apdu[1], cmd_apdu[4]);
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183 }