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annotate simtool/grcard1.c @ 72:5f7377392211

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doc/GrcardSIM1-notes article written
author Mychaela Falconia <falcon@freecalypso.org>
date Wed, 07 Apr 2021 05:18:17 +0000
parents c8e2a0e89d08
children
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1 /*
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2 * This module implements a few special commands for those very few
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3 * incredibly lucky people on Earth who have no-longer-available
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4 * sysmoSIM-GR1 cards, or any other branded variant of the same card
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5 * from Grcard. All knowledge of proprietary APDUs that appears in
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6 * this code comes from this Osmocom wiki page:
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7 *
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8 * https://osmocom.org/projects/cellular-infrastructure/wiki/GrcardSIM
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9 */
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10
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11 #include <sys/types.h>
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12 #include <stdio.h>
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13 #include "simresp.h"
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14
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15 /*
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16 * grcard1-set-pin1 command sets PIN1 and PUK1,
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17 * grcard1-set-pin2 command sets PIN2 and PUK2.
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18 *
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19 * The proprietary APDU structure for these commands is naturally
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20 * intuitive (agrees with common sense), hence they are expected
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21 * to be correct despite lack of testing.
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22 */
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23
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24 cmd_grcard1_set_pin(argc, argv)
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25 char **argv;
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26 {
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27 u_char cmd[21];
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28 int rc;
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29
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30 /* Grcard1 proprietary command APDU */
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31 cmd[0] = 0x80;
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32 cmd[1] = 0xD4;
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33 cmd[2] = 0x00;
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34 switch (argv[0][15]) {
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35 case '1':
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36 cmd[3] = 0x01;
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37 break;
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38 case '2':
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39 cmd[3] = 0x02;
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40 break;
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41 default:
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42 fprintf(stderr, "BUG in grcard1-set-pinN command\n");
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43 return(-1);
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44 }
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45 cmd[4] = 16;
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46 rc = encode_pin_entry(argv[1], cmd + 5);
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47 if (rc < 0)
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48 return(rc);
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49 rc = encode_pin_entry(argv[2], cmd + 13);
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50 if (rc < 0)
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51 return(rc);
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52 rc = apdu_exchange(cmd, 21);
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53 if (rc < 0)
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54 return(rc);
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55 if (sim_resp_sw != 0x9000) {
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56 fprintf(stderr, "bad SW response: %04X\n", sim_resp_sw);
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57 return(-1);
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58 }
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59 return(0);
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60 }
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61
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62 /*
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63 * The ADM PIN structure of GrcardSIM1 cards is poorly understood.
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64 * The Osmocom wiki page describes ADM1 and ADM2 per Grcard's ADMn
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65 * naming convention (see ../doc/ADM-PIN-numbering), but each of those
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66 * also has an associated unblock code (called AUK1 and AUK2 in the
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67 * wiki page), and the command APDUs set ADM+AUK pairs: either
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68 * ADM1+AUK1 or ADM2+AUK2. The following blind (untested) code is
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69 * based on this wiki page description.
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70 *
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71 * Because these access control codes are proprietary to Grcard
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72 * (not standard PIN1/PIN2/PUK1/PUK2), they can be arbitrary 64-bit
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73 * keys, not restricted to the ASCII-decimal subset used for standard
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74 * PINs and PUKs. According to pySim-prog, the canonical ADM2 key
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75 * on these cards is hex 4444444444444444, which is outside of the
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76 * ASCII-decimal range (contrast with the situation on GrcardSIM2,
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77 * where the canonical SUPER ADM is decimal 88888888) - hence our
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78 * grcard1-set-admN commands take hex strings for ADMn and AUKn,
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79 * not decimal ones like grcard1-set-pinN.
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80 */
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81
10
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82 cmd_grcard1_set_adm(argc, argv)
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83 char **argv;
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84 {
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85 u_char cmd[23];
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86 int rc;
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87
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88 /* Grcard1 proprietary command APDU */
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89 cmd[0] = 0x80;
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90 cmd[1] = 0xD4;
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91 cmd[2] = 0x01;
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92 switch (argv[0][15]) {
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93 case '1':
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94 case '4':
10
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95 cmd[3] = 0x04;
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96 break;
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97 case '2':
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98 case '5':
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99 cmd[3] = 0x05;
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100 break;
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101 default:
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102 fprintf(stderr, "BUG in grcard1-set-admN command\n");
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103 return(-1);
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104 }
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105 cmd[4] = 18;
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106 cmd[5] = 0x03;
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107 cmd[6] = 0x00;
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108 rc = decode_hex_data_from_string(argv[1], cmd + 7, 8, 8);
10
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109 if (rc < 0)
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110 return(rc);
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111 rc = decode_hex_data_from_string(argv[2], cmd + 15, 8, 8);
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112 if (rc < 0)
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113 return(rc);
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114 rc = apdu_exchange(cmd, 23);
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115 if (rc < 0)
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116 return(rc);
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117 if (sim_resp_sw != 0x9000) {
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118 fprintf(stderr, "bad SW response: %04X\n", sim_resp_sw);
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119 return(-1);
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120 }
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121 return(0);
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122 }
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123
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124 /*
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125 * The command for setting Ki has been extensively exercised
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126 * by Osmocom people, hence it is assumed to be correct.
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127 */
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128
10
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129 cmd_grcard1_set_ki(argc, argv)
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130 char **argv;
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131 {
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132 u_char cmd[21];
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133 int rc;
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134
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135 /* Grcard1 proprietary command APDU */
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136 cmd[0] = 0x80;
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137 cmd[1] = 0xD4;
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138 cmd[2] = 0x02;
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139 cmd[3] = 0x00;
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140 cmd[4] = 16;
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141 rc = decode_hex_data_from_string(argv[1], cmd + 5, 16, 16);
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142 if (rc < 0)
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143 return(rc);
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144 rc = apdu_exchange(cmd, 21);
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145 if (rc < 0)
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146 return(rc);
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147 if (sim_resp_sw != 0x9000) {
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148 fprintf(stderr, "bad SW response: %04X\n", sim_resp_sw);
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149 return(-1);
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150 }
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151 return(0);
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152 }