1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
|
/* -*- Mode: C; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4 -*- */
/*
* qmi-firmware-update -- Command line tool to update firmware in QMI devices
*
* This program is free software: you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation, either version 2 of the License, or
* (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program. If not, see <http://www.gnu.org/licenses/>.
*
* Copyright (C) 2016 Bjørn Mork <bjorn@mork.no>
* Copyright (C) 2016 Zodiac Inflight Innovations
* Copyright (C) 2016 Aleksander Morgado <aleksander@aleksander.es>
*
* crc16 and HDLC escape code borrowed from modemmanager/libqcdm
* Copyright (C) 2010 Red Hat, Inc.
*/
#include <stdio.h>
#include <string.h>
#include <glib.h>
#include "qfu-utils.h"
/******************************************************************************/
gchar *
qfu_utils_str_hex (gconstpointer mem,
gsize size,
gchar delimiter)
{
const guint8 *data = mem;
gsize i;
gsize j;
gsize new_str_length;
gchar *new_str;
/* Get new string length. If input string has N bytes, we need:
* - 1 byte for last NUL char
* - 2N bytes for hexadecimal char representation of each byte...
* - N-1 bytes for the separator ':'
* So... a total of (1+2N+N-1) = 3N bytes are needed... */
new_str_length = 3 * size;
/* Allocate memory for new array and initialize contents to NUL */
new_str = g_malloc0 (new_str_length);
/* Print hexadecimal representation of each byte... */
for (i = 0, j = 0; i < size; i++, j += 3) {
/* Print character in output string... */
snprintf (&new_str[j], 3, "%02X", data[i]);
/* And if needed, add separator */
if (i != (size - 1) )
new_str[j + 2] = delimiter;
}
/* Set output string */
return new_str;
}
/******************************************************************************/
gchar *
qfu_utils_get_firmware_image_unique_id_printable (const GArray *unique_id)
{
gchar *unique_id_str;
guint i;
guint n_ascii = 0;
gboolean end = FALSE;
#define UNIQUE_ID_LEN 16
g_warn_if_fail (unique_id->len <= UNIQUE_ID_LEN);
unique_id_str = g_malloc0 (UNIQUE_ID_LEN + 1);
memcpy (unique_id_str, unique_id->data, UNIQUE_ID_LEN);
/* We want an ASCII string that, if finished before the 16 bytes,
* is suffixed with NUL bytes. */
for (i = 0; i < UNIQUE_ID_LEN; i++) {
/* If a byte isn't ASCII, stop */
if (unique_id_str[i] & 0x80)
break;
/* If string isn't finished yet... */
if (!end) {
/* String finished now */
if (unique_id_str[i] == '\0')
end = TRUE;
else
n_ascii++;
} else {
/* String finished but we then got
* another ASCII byte? not possible */
if (unique_id_str[i] != '\0')
break;
}
}
if (i == UNIQUE_ID_LEN && n_ascii > 0)
return unique_id_str;
#undef UNIQUE_ID_LEN
g_free (unique_id_str);
/* Get a raw hex string otherwise */
unique_id_str = qfu_utils_str_hex (unique_id->data, unique_id->len, ':');
return unique_id_str;
}
/******************************************************************************/
/* Table of CRCs for each possible byte, with a generator polynomial of 0x8408 */
static const guint16 crc_table[256] = {
0x0000, 0x1189, 0x2312, 0x329b, 0x4624, 0x57ad, 0x6536, 0x74bf,
0x8c48, 0x9dc1, 0xaf5a, 0xbed3, 0xca6c, 0xdbe5, 0xe97e, 0xf8f7,
0x1081, 0x0108, 0x3393, 0x221a, 0x56a5, 0x472c, 0x75b7, 0x643e,
0x9cc9, 0x8d40, 0xbfdb, 0xae52, 0xdaed, 0xcb64, 0xf9ff, 0xe876,
0x2102, 0x308b, 0x0210, 0x1399, 0x6726, 0x76af, 0x4434, 0x55bd,
0xad4a, 0xbcc3, 0x8e58, 0x9fd1, 0xeb6e, 0xfae7, 0xc87c, 0xd9f5,
0x3183, 0x200a, 0x1291, 0x0318, 0x77a7, 0x662e, 0x54b5, 0x453c,
0xbdcb, 0xac42, 0x9ed9, 0x8f50, 0xfbef, 0xea66, 0xd8fd, 0xc974,
0x4204, 0x538d, 0x6116, 0x709f, 0x0420, 0x15a9, 0x2732, 0x36bb,
0xce4c, 0xdfc5, 0xed5e, 0xfcd7, 0x8868, 0x99e1, 0xab7a, 0xbaf3,
0x5285, 0x430c, 0x7197, 0x601e, 0x14a1, 0x0528, 0x37b3, 0x263a,
0xdecd, 0xcf44, 0xfddf, 0xec56, 0x98e9, 0x8960, 0xbbfb, 0xaa72,
0x6306, 0x728f, 0x4014, 0x519d, 0x2522, 0x34ab, 0x0630, 0x17b9,
0xef4e, 0xfec7, 0xcc5c, 0xddd5, 0xa96a, 0xb8e3, 0x8a78, 0x9bf1,
0x7387, 0x620e, 0x5095, 0x411c, 0x35a3, 0x242a, 0x16b1, 0x0738,
0xffcf, 0xee46, 0xdcdd, 0xcd54, 0xb9eb, 0xa862, 0x9af9, 0x8b70,
0x8408, 0x9581, 0xa71a, 0xb693, 0xc22c, 0xd3a5, 0xe13e, 0xf0b7,
0x0840, 0x19c9, 0x2b52, 0x3adb, 0x4e64, 0x5fed, 0x6d76, 0x7cff,
0x9489, 0x8500, 0xb79b, 0xa612, 0xd2ad, 0xc324, 0xf1bf, 0xe036,
0x18c1, 0x0948, 0x3bd3, 0x2a5a, 0x5ee5, 0x4f6c, 0x7df7, 0x6c7e,
0xa50a, 0xb483, 0x8618, 0x9791, 0xe32e, 0xf2a7, 0xc03c, 0xd1b5,
0x2942, 0x38cb, 0x0a50, 0x1bd9, 0x6f66, 0x7eef, 0x4c74, 0x5dfd,
0xb58b, 0xa402, 0x9699, 0x8710, 0xf3af, 0xe226, 0xd0bd, 0xc134,
0x39c3, 0x284a, 0x1ad1, 0x0b58, 0x7fe7, 0x6e6e, 0x5cf5, 0x4d7c,
0xc60c, 0xd785, 0xe51e, 0xf497, 0x8028, 0x91a1, 0xa33a, 0xb2b3,
0x4a44, 0x5bcd, 0x6956, 0x78df, 0x0c60, 0x1de9, 0x2f72, 0x3efb,
0xd68d, 0xc704, 0xf59f, 0xe416, 0x90a9, 0x8120, 0xb3bb, 0xa232,
0x5ac5, 0x4b4c, 0x79d7, 0x685e, 0x1ce1, 0x0d68, 0x3ff3, 0x2e7a,
0xe70e, 0xf687, 0xc41c, 0xd595, 0xa12a, 0xb0a3, 0x8238, 0x93b1,
0x6b46, 0x7acf, 0x4854, 0x59dd, 0x2d62, 0x3ceb, 0x0e70, 0x1ff9,
0xf78f, 0xe606, 0xd49d, 0xc514, 0xb1ab, 0xa022, 0x92b9, 0x8330,
0x7bc7, 0x6a4e, 0x58d5, 0x495c, 0x3de3, 0x2c6a, 0x1ef1, 0x0f78
};
/* Calculate the CRC for a buffer using a seed of 0xffff */
guint16
qfu_utils_crc16 (const guint8 *buffer,
gsize len)
{
guint16 crc = 0xffff;
while (len--)
crc = crc_table[(crc ^ *buffer++) & 0xff] ^ (crc >> 8);
return ~crc;
}
|
