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
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
|
#include <stdio.h>
#include <stdint.h>
#include <stdbool.h>
#include <fcntl.h>
#include <sys/mman.h>
#include <sys/types.h>
#include <sys/stat.h>
#include <unistd.h>
#include <err.h>
#include "memory.h"
#include "uchars.h"
#include "api.h"
uint32_t MsiGetFileVersionW(const char16_t *filename,
char16_t *version, uint32_t *version_size,
char16_t *language, uint32_t *language_size)
{
char *fname = ascii(filename, true);
uint32_t toret = 1006; /* ERROR_FILE_INVALID == 'no version info found' */
int fd = -1;
void *mapv = MAP_FAILED;
if (version && *version_size)
*version = 0;
if (language && *language_size)
*language = 0;
fd = open(fname, O_RDONLY);
if (fd < 0)
err(1, "%s: open", fname);
struct stat st;
if (fstat(fd, &st) < 0)
err(1, "%s: fstat", fname);
size_t fsize = st.st_size;
mapv = mmap(NULL, fsize, PROT_READ, MAP_PRIVATE, fd, 0);
if (mapv == MAP_FAILED)
err(1, "%s: mmap", fname);
unsigned char *map = (unsigned char *)mapv;
#define BYTE(offset) ({ \
size_t _boffset = (offset); \
if (_boffset >= fsize) goto cleanup; /* outside file bounds */ \
map[_boffset]; \
})
#define WORD16(offset) ({ \
size_t _woffset = (offset); \
uint16_t toret = BYTE(_woffset+1); \
toret = (toret << 8) | BYTE(_woffset+0); \
toret; \
})
#define WORD32(offset) ({ \
size_t _doffset = (offset); \
uint32_t toret = BYTE(_doffset+3); \
toret = (toret << 8) | BYTE(_doffset+2); \
toret = (toret << 8) | BYTE(_doffset+1); \
toret = (toret << 8) | BYTE(_doffset+0); \
toret; \
})
if (WORD16(0) != (('Z'<<8) | 'M')) {
warnx("MsiGetFileInfo(%s) -> no MZ", fname);
goto cleanup;
}
unsigned pe_pos = WORD32(0x3c);
if (WORD32(pe_pos) != (('E'<<8) | 'P')) {
warnx("MsiGetFileInfo(%s) -> no PE", fname);
goto cleanup;
}
pe_pos += 4; /* skip to the main header */
unsigned nsections = WORD16(pe_pos + 2);
unsigned opthdr_size = WORD16(pe_pos + 16);
unsigned opthdr_pos = pe_pos + 20;
/* bool sixtyfourbit = WORD16(opthdr_pos) == 0x020B; */
unsigned secthdr_pos = opthdr_pos + opthdr_size;
while (nsections > 0) {
if (BYTE(secthdr_pos+0) == '.' &&
BYTE(secthdr_pos+1) == 'r' &&
BYTE(secthdr_pos+2) == 's' &&
BYTE(secthdr_pos+3) == 'r' &&
BYTE(secthdr_pos+4) == 'c' &&
BYTE(secthdr_pos+5) == 0)
goto found_resource_section;
secthdr_pos += 0x28;
nsections--;
}
warnx("MsiGetFileInfo(%s) -> no .rsrc", fname);
goto cleanup;
found_resource_section:;
unsigned rsrc_size = WORD32(secthdr_pos+8);
unsigned rsrc_offset = WORD32(secthdr_pos+20);
unsigned rsrc_vaddr = WORD32(secthdr_pos+12);
unsigned res_dir_offset = rsrc_offset;
unsigned nnamed, nid;
nnamed = WORD16(res_dir_offset+12);
nid = WORD16(res_dir_offset+14);
for (unsigned i = nnamed; i < nnamed+nid; i++) {
unsigned id = WORD32(res_dir_offset + 16 + 8*i);
unsigned entry = WORD32(res_dir_offset + 16 + 8*i + 4);
if (id == 16 && (entry & 0x80000000)) {
res_dir_offset = rsrc_offset + (entry & 0x7FFFFFFF);
goto found_versioninfo_toplevel;
}
}
warnx("MsiGetFileInfo(%s) -> no top-level numeric key 16 for versioninfo", fname);
goto cleanup;
found_versioninfo_toplevel:
nnamed = WORD16(res_dir_offset+12);
nid = WORD16(res_dir_offset+14);
for (unsigned i = 0; i < nnamed+nid; i++) {
unsigned entry = WORD32(res_dir_offset + 16 + 8*i + 4);
if (entry & 0x80000000) {
res_dir_offset = rsrc_offset + (entry & 0x7FFFFFFF);
goto found_versioninfo_2ndlevel;
}
}
warnx("MsiGetFileInfo(%s) -> no 2nd-level subdir", fname);
goto cleanup;
found_versioninfo_2ndlevel:
nnamed = WORD16(res_dir_offset+12);
nid = WORD16(res_dir_offset+14);
for (unsigned i = 0; i < nnamed+nid; i++) {
unsigned entry = WORD32(res_dir_offset + 16 + 8*i + 4);
if (!(entry & 0x80000000)) {
res_dir_offset = rsrc_offset + (entry & 0x7FFFFFFF);
goto found_versioninfo_3rdlevel;
}
}
warnx("MsiGetFileInfo(%s) -> no 3rd-level resource data", fname);
goto cleanup;
found_versioninfo_3rdlevel:;
unsigned versioninfo_offset = WORD32(res_dir_offset);
unsigned versioninfo_size = WORD32(res_dir_offset+4);
versioninfo_offset = rsrc_offset + versioninfo_offset - rsrc_vaddr;
unsigned name_offset = versioninfo_offset + 6;
const char *next_name_chr = "VS_VERSION_INFO";
do {
if (WORD16(name_offset) != *next_name_chr)
goto cleanup; /* identifying string didn't match */
name_offset += 2;
} while (*next_name_chr++);
unsigned fixed_offset = (name_offset + 3) & ~3;
if (WORD32(fixed_offset) != 0xFEEF04BDU) {
warnx("MsiGetFileInfo(%s) -> no VS_FIXEDFILEINFO magic number", fname);
goto cleanup;
}
int four_part_version[4];
four_part_version[0] = WORD16(fixed_offset + 10);
four_part_version[1] = WORD16(fixed_offset + 8);
four_part_version[2] = WORD16(fixed_offset + 14);
four_part_version[3] = WORD16(fixed_offset + 12);
unsigned child_offset = fixed_offset +
WORD16(versioninfo_offset+2);
unsigned lcid;
while (child_offset < versioninfo_offset + versioninfo_size) {
unsigned this_child_offset = child_offset;
child_offset += WORD16(child_offset);
child_offset = (child_offset + 3) &~ 3;
if (child_offset <= this_child_offset) {
warnx("MsiGetFileInfo(%s) -> bad length field", fname);
goto cleanup;
}
const char *next_name_chr = "VarFileInfo";
name_offset = this_child_offset + 6;
do {
if (WORD16(name_offset) != *next_name_chr)
goto this_is_not_a_varfileinfo;
name_offset += 2;
} while (*next_name_chr++);
unsigned subchild_offset = (name_offset + 3) & ~3;
next_name_chr = "Translation";
name_offset = subchild_offset + 6;
do {
if (WORD16(name_offset) != *next_name_chr) {
warnx("MsiGetFileInfo(%s) -> child not called 'Translation'", fname);
goto cleanup;
}
name_offset += 2;
} while (*next_name_chr++);
subchild_offset = (name_offset + 3) & ~3;
lcid = WORD16(subchild_offset);
goto success;
this_is_not_a_varfileinfo:
continue;
}
warnx("MsiGetFileInfo(%s) -> no VarFileInfo found", fname);
goto cleanup;
success:;
char verbuf[256], langbuf[256];
snprintf(verbuf, sizeof(verbuf), "%d.%d.%d.%d",
four_part_version[0], four_part_version[1],
four_part_version[2], four_part_version[3]);
snprintf(langbuf, sizeof(langbuf), "%u", lcid);
warnx("MsiGetFileInfo(%s) -> version %s lang %s", fname, verbuf, langbuf);
if (version)
c16cpy(version, version_size, verbuf);
if (language)
c16cpy(language, language_size, langbuf);
toret = 0;
cleanup:
if (mapv != MAP_FAILED)
munmap(mapv, fsize);
if (fd != -1)
close(fd);
sfree(fname);
return toret;
}
|