FreeCalypso > hg > fc-sim-tools

annotate simtool/sjs1_hacks.c @ 83:3055d5c9e7a3

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fc-simtool update-rec* commands: check curfile_record_len and error out if it is not set
author Mychaela Falconia <falcon@freecalypso.org>
date Sun, 11 Apr 2021 02:38:31 +0000
parents ddd767f6e15b
children
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10
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1 /*
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2 * This module implements a few special commands for the recently
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3 * discontinued sysmoUSIM-SJS1 card model from Sysmocom. These commands
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4 * are NOT applicable to the successor sysmoISIM-SJA2 card model!
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5 */
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6
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7 #include <sys/types.h>
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8 #include <string.h>
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9 #include <strings.h>
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10 #include <stdio.h>
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11 #include <stdlib.h>
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12 #include "simresp.h"
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13 #include "curfile.h"
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14 #include "file_id.h"
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15
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16 /*
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17 * SJS1 is natively a UICC, supporting the classic GSM 11.11 SIM protocol
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18 * only as a backward compatibility mode. The makers of that UICC CardOS
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19 * clearly did not want people to do administrative programming via the
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20 * GSM 11.11 SIM protocol, instead their vision was that admin programming
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21 * should only be done in UICC mode. Toward this end, SJS1 cards do not
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22 * accept VERIFY CHV commands with CLA=0xA0 P2=0x0A for ADM1 authentication,
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23 * instead they only accept VERIFY PIN with CLA=0x00 for this purpose.
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24 *
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25 * They did leave one open loophole, however: if the UICC-style VERIFY PIN
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26 * command with P2=0x0A for ADM1 authentication is given as the very first
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27 * command in the card session, then it can be followed either by other
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28 * UICC protocol commands (making a UICC card session), or by CLA=0xA0
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29 * protocol commands, making a GSM 11.11 SIM session with ADM1 authentication.
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30 * In other words, they allow one special exception to the general rule
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31 * where SIM and UICC protocol commands are never allowed to mix in the
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32 * same card session.
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33 */
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34
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35 cmd_verify_sjs1_adm1(argc, argv)
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36 char **argv;
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37 {
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38 u_char cmd[13];
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39 int rc;
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40
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41 /* UICC-style VERIFY PIN command APDU */
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42 cmd[0] = 0x00;
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43 cmd[1] = 0x20;
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44 cmd[2] = 0x00;
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45 cmd[3] = 0x0A;
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46 cmd[4] = 8;
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47 rc = encode_pin_entry(argv[1], cmd + 5);
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48 if (rc < 0)
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49 return(rc);
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50 rc = apdu_exchange(cmd, 13);
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51 if (rc < 0)
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52 return(rc);
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53 if (sim_resp_sw != 0x9000) {
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54 fprintf(stderr, "bad SW response: %04X\n", sim_resp_sw);
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55 return(-1);
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56 }
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57 return(0);
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58 }
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59
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60 /*
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61 * Early sysmoUSIM-SJS1 cards (those sold in 2017, but not the very last
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62 * ones sold in late 2020) were shipped with a misprogrammed MSISDN record.
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63 * Our fix-sysmo-msisdn command fixes this particular misprogramming.
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64 */
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65
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66 cmd_fix_sysmo_msisdn()
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67 {
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68 int rc;
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69 unsigned n;
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70 u_char newrec[34];
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71
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72 rc = select_op(DF_TELECOM);
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73 if (rc < 0)
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74 return(rc);
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75 rc = select_op(EF_MSISDN);
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76 if (rc < 0)
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77 return(rc);
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78 rc = parse_ef_select_response();
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79 if (rc < 0)
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80 return(rc);
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81 if (curfile_structure != 0x01) {
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82 fprintf(stderr, "error: EF_MSISDN is not linear fixed\n");
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83 return(-1);
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84 }
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85 if (curfile_record_len != 34) {
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86 fprintf(stderr,
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87 "error: expected EF_MSISDN record length of 34 bytes, got %u\n",
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88 curfile_record_len);
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89 return(-1);
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90 }
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91 rc = readrec_op(1, 0x04, 34);
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92 if (rc < 0)
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93 return(rc);
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94 for (n = 0; n < 18; n++) {
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95 if (sim_resp_data[n] != 0xFF) {
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96 fprintf(stderr,
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97 "error: non-FF data in the first 18 bytes of alpha tag area\n");
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98 return(-1);
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99 }
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100 }
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101 if (sim_resp_data[18] == 0xFF && sim_resp_data[19] == 0xFF) {
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102 printf(
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103 "last 2 bytes of alpha tag area are clear - already fixed?\n");
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104 return(0);
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105 }
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106 if (sim_resp_data[18] != 0x07 || sim_resp_data[19] != 0x91) {
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107 fprintf(stderr,
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108 "error: bytes 18 & 19 don't match expected bogus programming\n");
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109 return(-1);
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110 }
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111 memset(newrec, 0xFF, 34);
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112 memcpy(newrec + 20, sim_resp_data + 18, 8);
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113 return update_rec_op(1, 0x04, newrec, 34);
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114 }