annotate libcommon/alpha_valid.c @ 74:8562d8508cf2

grcard2-set-{adm,super}-hex commands implemented It appears that GrcardSIM2 cards allow arbitrary 64-bit keys for ADM and SUPER ADM, not necessarily consisting of ASCII digits like the specs require for standard PIN and PUK, and pySim-prog.py in fact sets the ADM key to 4444444444444444 in hex by default, which is not an ASCII digit string. If the cards allow such keys, we need to support them too.
author Mychaela Falconia <falcon@freecalypso.org>
date Tue, 16 Feb 2021 04:10:36 +0000
parents f7145c77b7fb
children
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0
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1 /*
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2 * This module contains functions for validating alpha fields
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3 * that exist in various SIM files.
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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 <string.h>
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8 #include <strings.h>
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9 #include <stdio.h>
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10 #include <stdlib.h>
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11
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12 static
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13 validate_classic_gsm(data, nbytes, textlenp)
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14 u_char *data;
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15 unsigned nbytes, *textlenp;
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16 {
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17 u_char *dp;
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18 unsigned n;
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19
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20 dp = data;
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21 for (n = 0; n < nbytes; n++) {
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22 if (*dp == 0xFF)
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23 break;
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24 if (*dp & 0x80)
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25 return(-1);
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26 dp++;
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27 }
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28 if (textlenp)
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29 *textlenp = n;
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30 for (; n < nbytes; n++)
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31 if (*dp++ != 0xFF)
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32 return(-1);
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33 return(0);
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34 }
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35
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36 static
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37 validate_ucs2_80(data, nbytes, textlenp)
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38 u_char *data;
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39 unsigned nbytes, *textlenp;
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40 {
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41 u_char *dp, *endp;
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42
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43 if (nbytes < 3)
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44 return(-1);
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45 dp = data + 1;
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46 endp = data + nbytes;
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47 while (dp < endp) {
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48 if (dp + 1 == endp) {
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49 if (*dp != 0xFF)
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50 return(-1);
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51 if (textlenp)
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52 *textlenp = dp - data;
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53 return(0);
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54 }
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55 if (dp[0] == 0xFF && dp[1] == 0xFF)
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56 break;
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57 dp += 2;
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58 }
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59 if (textlenp)
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60 *textlenp = dp - data;
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61 while (dp < endp)
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62 if (*dp++ != 0xFF)
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63 return(-1);
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64 return(0);
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65 }
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66
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67 static
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68 validate_ucs2_81(data, nbytes, textlenp)
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69 u_char *data;
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70 unsigned nbytes, *textlenp;
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71 {
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72 u_char *dp, *endp;
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73 unsigned textlen;
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74
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75 if (nbytes < 4)
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76 return(-1);
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77 if (!data[1])
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78 return(-1);
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79 textlen = data[1] + 3;
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80 if (textlen > nbytes)
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81 return(-1);
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82 if (textlenp)
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83 *textlenp = textlen;
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84 dp = data + textlen;
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85 endp = data + nbytes;
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86 while (dp < endp)
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87 if (*dp++ != 0xFF)
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88 return(-1);
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89 return(0);
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90 }
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91
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92 static
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93 validate_ucs2_82(data, nbytes, textlenp)
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94 u_char *data;
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95 unsigned nbytes, *textlenp;
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96 {
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97 u_char *dp, *endp;
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98 unsigned textlen;
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99
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100 if (nbytes < 5)
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101 return(-1);
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102 if (!data[1])
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103 return(-1);
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104 textlen = data[1] + 4;
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105 if (textlen > nbytes)
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106 return(-1);
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107 if (textlenp)
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108 *textlenp = textlen;
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109 dp = data + textlen;
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110 endp = data + nbytes;
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111 while (dp < endp)
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112 if (*dp++ != 0xFF)
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113 return(-1);
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114 return(0);
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115 }
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116
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117 static
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118 validate_empty(data, nbytes, textlenp)
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119 u_char *data;
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120 unsigned nbytes, *textlenp;
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121 {
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122 u_char *dp;
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123 unsigned n;
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124
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125 dp = data;
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126 for (n = 0; n < nbytes; n++)
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127 if (*dp++ != 0xFF)
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128 return(-1);
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129 if (textlenp)
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130 *textlenp = 0;
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131 return(0);
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132 }
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133
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134 validate_alpha_field(data, nbytes, textlenp)
f7145c77b7fb starting libcommon: factored out of fc-simtool
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
135 u_char *data;
f7145c77b7fb starting libcommon: factored out of fc-simtool
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
136 unsigned nbytes, *textlenp;
f7145c77b7fb starting libcommon: factored out of fc-simtool
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
137 {
f7145c77b7fb starting libcommon: factored out of fc-simtool
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
138 if (data[0] < 0x80)
f7145c77b7fb starting libcommon: factored out of fc-simtool
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
139 return validate_classic_gsm(data, nbytes, textlenp);
f7145c77b7fb starting libcommon: factored out of fc-simtool
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
140 switch (data[0]) {
f7145c77b7fb starting libcommon: factored out of fc-simtool
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
141 case 0x80:
f7145c77b7fb starting libcommon: factored out of fc-simtool
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
142 return validate_ucs2_80(data, nbytes, textlenp);
f7145c77b7fb starting libcommon: factored out of fc-simtool
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
143 case 0x81:
f7145c77b7fb starting libcommon: factored out of fc-simtool
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
144 return validate_ucs2_81(data, nbytes, textlenp);
f7145c77b7fb starting libcommon: factored out of fc-simtool
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
145 case 0x82:
f7145c77b7fb starting libcommon: factored out of fc-simtool
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
146 return validate_ucs2_82(data, nbytes, textlenp);
f7145c77b7fb starting libcommon: factored out of fc-simtool
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
147 case 0xFF:
f7145c77b7fb starting libcommon: factored out of fc-simtool
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
148 return validate_empty(data, nbytes, textlenp);
f7145c77b7fb starting libcommon: factored out of fc-simtool
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
149 default:
f7145c77b7fb starting libcommon: factored out of fc-simtool
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
150 return -1;
f7145c77b7fb starting libcommon: factored out of fc-simtool
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
151 }
f7145c77b7fb starting libcommon: factored out of fc-simtool
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
152 }