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comparison simtool/sysmo.c @ 1:2071b28cd0c7

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simtool: first refactored version
author Mychaela Falconia <falcon@freecalypso.org>
date Thu, 11 Feb 2021 23:04:28 +0000
parents
children c0cd0d4635bb
comparison
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0:f7145c77b7fb 1:2071b28cd0c7
1 /*
2 * This module implements special commands for programmable and
3 * semi-programmable (made-up term for the version without ADM keys)
4 * SIM cards made by Sysmocom.
5 */
6
7 #include <sys/types.h>
8 #include <string.h>
9 #include <strings.h>
10 #include <stdio.h>
11 #include <stdlib.h>
12 #include "simresp.h"
13 #include "curfile.h"
14 #include "file_id.h"
15
16 cmd_fix_sysmo_msisdn()
17 {
18 int rc;
19 unsigned n;
20 u_char newrec[34];
21
22 rc = select_op(DF_TELECOM);
23 if (rc < 0)
24 return(rc);
25 rc = select_op(EF_MSISDN);
26 if (rc < 0)
27 return(rc);
28 rc = parse_ef_select_response();
29 if (rc < 0)
30 return(rc);
31 if (curfile_structure != 0x01) {
32 fprintf(stderr, "error: EF_MSISDN is not linear fixed\n");
33 return(-1);
34 }
35 if (curfile_record_len != 34) {
36 fprintf(stderr,
37 "error: expected EF_MSISDN record length of 34 bytes, got %u\n",
38 curfile_record_len);
39 return(-1);
40 }
41 rc = readrec_op(1, 0x04, 34);
42 if (rc < 0)
43 return(rc);
44 for (n = 0; n < 18; n++) {
45 if (sim_resp_data[n] != 0xFF) {
46 fprintf(stderr,
47 "error: non-FF data in the first 18 bytes of alpha tag area\n");
48 return(-1);
49 }
50 }
51 if (sim_resp_data[18] == 0xFF && sim_resp_data[19] == 0xFF) {
52 printf(
53 "last 2 bytes of alpha tag area are clear - already fixed?\n");
54 return(0);
55 }
56 if (sim_resp_data[18] != 0x07 || sim_resp_data[19] != 0x91) {
57 fprintf(stderr,
58 "error: bytes 18 & 19 don't match expected bogus programming\n");
59 return(-1);
60 }
61 memset(newrec, 0xFF, 34);
62 memcpy(newrec + 20, sim_resp_data + 18, 8);
63 return update_rec_op(1, 0x04, newrec, 34);
64 }