FreeCalypso > hg > themwi-ota-tools

annotate smswrap/ota-smswrap-sjs1.c @ 11:b4b4a822286c default tip

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add INSTALL
author Mychaela Falconia <falcon@freecalypso.org>
date Tue, 21 May 2024 01:06:04 +0000
parents 8dfa3bfaa9c1
children
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2
d5e9af482548 ota-smswrap-sjs1 program written, compiles
Mychaela Falconia <falcon@freecalypso.org>
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1 /*
d5e9af482548 ota-smswrap-sjs1 program written, compiles
Mychaela Falconia <falcon@freecalypso.org>
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2 * This utility will read a string of RFM APDU commands from stdin
d5e9af482548 ota-smswrap-sjs1 program written, compiles
Mychaela Falconia <falcon@freecalypso.org>
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3 * and wrap this OTA command block into an SMS-PP User Data element
d5e9af482548 ota-smswrap-sjs1 program written, compiles
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4 * as appropriate for sysmoUSIM-SJS1 version of SIM RFM, including
d5e9af482548 ota-smswrap-sjs1 program written, compiles
Mychaela Falconia <falcon@freecalypso.org>
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5 * the necessary cryptographic checksum and ciphering.
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Mychaela Falconia <falcon@freecalypso.org>
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6 *
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Mychaela Falconia <falcon@freecalypso.org>
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7 * The two command line arguments are KIC2 and KID2 secret keys
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Mychaela Falconia <falcon@freecalypso.org>
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8 * for the target SIM, the payload to be wrapped is supplied on stdin.
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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 <openssl/des.h>
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13 #include <stdio.h>
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14 #include <stdlib.h>
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15 #include <string.h>
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16 #include <strings.h>
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17
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18 #define MAX_PAYLOAD_LEN 106
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19
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20 #define MAX_SIGBUF (MAX_PAYLOAD_LEN + 16 + 6)
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21 #define MAX_CIPHERTEXT (MAX_PAYLOAD_LEN + 14)
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22
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23 u_char payload_data[MAX_PAYLOAD_LEN];
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24 unsigned payload_len, padding_len;
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25 int padding_mode;
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26
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27 DES_key_schedule keysched_kic[2], keysched_kid[2];
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28
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29 u_char part_head[8] = {0x15, 0x06, 0x01, 0x25, 0x25, 0xB0, 0x00, 0x10};
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30
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31 u_char part_cnt[6], signature[8];
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32 u_char ciphertext[MAX_CIPHERTEXT];
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33 unsigned ciphertext_len;
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34
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35 process_key_arg(arg, sched, name)
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36 char *arg, *name;
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37 DES_key_schedule *sched;
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38 {
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39 DES_cblock keybin[2];
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Mychaela Falconia <falcon@freecalypso.org>
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40 int rc;
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41 unsigned n;
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42
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43 rc = decode_hex_data_from_string(arg, keybin, 16, 16);
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44 if (rc < 0)
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45 exit(1); /* error msg already printed */
3
8dfa3bfaa9c1 Sysmocom 2DES keys don't have correct parity
Mychaela Falconia <falcon@freecalypso.org>
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46 for (n = 0; n < 2; n++)
8dfa3bfaa9c1 Sysmocom 2DES keys don't have correct parity
Mychaela Falconia <falcon@freecalypso.org>
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47 DES_set_key_unchecked(keybin + n, sched + n);
2
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48 }
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49
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50 read_payload()
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51 {
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52 int rc;
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Mychaela Falconia <falcon@freecalypso.org>
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53 unsigned maxlen;
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54
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55 maxlen = MAX_PAYLOAD_LEN;
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56 if (padding_mode)
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Mychaela Falconia <falcon@freecalypso.org>
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57 maxlen -= 8;
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58 rc = read_hex_from_stdin(payload_data, maxlen);
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Mychaela Falconia <falcon@freecalypso.org>
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59 if (rc < 0)
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60 exit(1); /* error msg already printed */
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61 payload_len = rc;
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62 }
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63
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64 compute_pad_length()
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65 {
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66 unsigned ciph_len, rem;
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67
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Mychaela Falconia <falcon@freecalypso.org>
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68 ciph_len = payload_len + 14;
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Mychaela Falconia <falcon@freecalypso.org>
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69 rem = ciph_len & 7;
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70 if (!rem && !padding_mode)
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71 padding_len = 0;
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72 else
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73 padding_len = 8 - rem;
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74 }
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75
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76 compute_signature()
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77 {
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78 u_char plainbuf[MAX_SIGBUF], cipher_out[MAX_SIGBUF];
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Mychaela Falconia <falcon@freecalypso.org>
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79 unsigned ciphlen;
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Mychaela Falconia <falcon@freecalypso.org>
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80 DES_cblock ivec;
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81
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82 plainbuf[0] = 0;
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83 plainbuf[1] = payload_len + padding_len + 8 + 8 + 6;
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Mychaela Falconia <falcon@freecalypso.org>
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84 bcopy(part_head, plainbuf + 2, 8);
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85 bcopy(part_cnt, plainbuf + 10, 6);
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86 bcopy(payload_data, plainbuf + 16, payload_len + padding_len);
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87 bzero(plainbuf + 16 + payload_len + padding_len, 6);
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88 ciphlen = payload_len + padding_len + 16 + 6;
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89 bzero(&ivec, sizeof ivec);
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90 DES_ede2_cbc_encrypt(plainbuf, cipher_out, ciphlen, &keysched_kid[0],
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91 &keysched_kid[1], &ivec, DES_ENCRYPT);
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92 bcopy(cipher_out + ciphlen - 8, signature, 8);
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93 }
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94
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95 encrypt_message()
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96 {
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97 u_char plainbuf[MAX_CIPHERTEXT];
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98 DES_cblock ivec;
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99
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100 bcopy(part_cnt, plainbuf, 6);
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101 bcopy(signature, plainbuf + 6, 8);
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102 bcopy(payload_data, plainbuf + 14, payload_len + padding_len);
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103 ciphertext_len = payload_len + padding_len + 14;
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104 bzero(&ivec, sizeof ivec);
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105 DES_ede2_cbc_encrypt(plainbuf, ciphertext, ciphertext_len,
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106 &keysched_kic[0], &keysched_kic[1], &ivec,
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107 DES_ENCRYPT);
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108 }
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109
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110 emit_hex_bytes(bytes, len)
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111 u_char *bytes;
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112 unsigned len;
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113 {
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114 u_char *dp;
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115 unsigned n;
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116
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117 dp = bytes;
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118 for (n = 0; n < len; n++)
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119 printf("%02X", *dp++);
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120 }
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121
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122 main(argc, argv)
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123 char **argv;
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124 {
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125 if (argc < 3 || argc > 4) {
d5e9af482548 ota-smswrap-sjs1 program written, compiles
Mychaela Falconia <falcon@freecalypso.org>
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126 fprintf(stderr, "usage: %s KIC2-hex KID2-hex\n", argv[0]);
d5e9af482548 ota-smswrap-sjs1 program written, compiles
Mychaela Falconia <falcon@freecalypso.org>
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127 exit(1);
d5e9af482548 ota-smswrap-sjs1 program written, compiles
Mychaela Falconia <falcon@freecalypso.org>
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128 }
d5e9af482548 ota-smswrap-sjs1 program written, compiles
Mychaela Falconia <falcon@freecalypso.org>
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129 process_key_arg(argv[1], keysched_kic, "KIC2");
d5e9af482548 ota-smswrap-sjs1 program written, compiles
Mychaela Falconia <falcon@freecalypso.org>
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130 process_key_arg(argv[2], keysched_kid, "KID2");
d5e9af482548 ota-smswrap-sjs1 program written, compiles
Mychaela Falconia <falcon@freecalypso.org>
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131 if (argc > 3)
d5e9af482548 ota-smswrap-sjs1 program written, compiles
Mychaela Falconia <falcon@freecalypso.org>
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132 padding_mode = atoi(argv[3]);
d5e9af482548 ota-smswrap-sjs1 program written, compiles
Mychaela Falconia <falcon@freecalypso.org>
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133 else
d5e9af482548 ota-smswrap-sjs1 program written, compiles
Mychaela Falconia <falcon@freecalypso.org>
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134 padding_mode = 0;
d5e9af482548 ota-smswrap-sjs1 program written, compiles
Mychaela Falconia <falcon@freecalypso.org>
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135 read_payload();
d5e9af482548 ota-smswrap-sjs1 program written, compiles
Mychaela Falconia <falcon@freecalypso.org>
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136 compute_pad_length();
d5e9af482548 ota-smswrap-sjs1 program written, compiles
Mychaela Falconia <falcon@freecalypso.org>
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137 part_cnt[5] = padding_len;
d5e9af482548 ota-smswrap-sjs1 program written, compiles
Mychaela Falconia <falcon@freecalypso.org>
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138 compute_signature();
d5e9af482548 ota-smswrap-sjs1 program written, compiles
Mychaela Falconia <falcon@freecalypso.org>
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139 encrypt_message();
d5e9af482548 ota-smswrap-sjs1 program written, compiles
Mychaela Falconia <falcon@freecalypso.org>
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140 /* emit output! */
d5e9af482548 ota-smswrap-sjs1 program written, compiles
Mychaela Falconia <falcon@freecalypso.org>
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141 printf("027000%04X", ciphertext_len + 8);
d5e9af482548 ota-smswrap-sjs1 program written, compiles
Mychaela Falconia <falcon@freecalypso.org>
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142 emit_hex_bytes(part_head, 8);
d5e9af482548 ota-smswrap-sjs1 program written, compiles
Mychaela Falconia <falcon@freecalypso.org>
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143 emit_hex_bytes(ciphertext, ciphertext_len);
d5e9af482548 ota-smswrap-sjs1 program written, compiles
Mychaela Falconia <falcon@freecalypso.org>
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144 putchar('\n');
d5e9af482548 ota-smswrap-sjs1 program written, compiles
Mychaela Falconia <falcon@freecalypso.org>
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145 exit(0);
d5e9af482548 ota-smswrap-sjs1 program written, compiles
Mychaela Falconia <falcon@freecalypso.org>
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146 }