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
|
#include <endian.h>
#include <string.h>
#include <perk/perk.h>
#include "perk_impl.h"
int pe_read_optional_header(const union pe_opt_hdr * p, struct pe_meta_opt_hdr * m)
{
m->std.magic = pe_read_short(p->opt_hdr_32.magic);
memset(&m->dirs,0,sizeof(m->dirs));
#if (BYTE_ORDER == LITTLE_ENDIAN)
memcpy(&m->std,p,sizeof(struct pe_meta_opt_hdr_std));
switch (m->std.magic) {
case PE_MAGIC_PE32:
memcpy(&m->vers,&p->opt_hdr_32.major_os_ver,sizeof(struct pe_meta_opt_hdr_vers));
memcpy(&m->align,&p->opt_hdr_32.section_align,sizeof(struct pe_meta_opt_hdr_align));
memcpy(&m->img,&p->opt_hdr_32.size_of_image,sizeof(struct pe_meta_opt_hdr_img));
memcpy(&m->ldr,&p->opt_hdr_32.loader_flags,sizeof(struct pe_meta_opt_hdr_ldr));
if (m->ldr.rva_and_sizes > 0x10)
return PERK_BAD_IMAGE_TYPE;
else
memcpy(&m->dirs,&p->opt_hdr_32.export_tbl,sizeof(struct pe_meta_opt_hdr_dirs));
break;
case PE_MAGIC_PE32_PLUS:
memcpy(&m->vers,&p->opt_hdr_64.major_os_ver,sizeof(struct pe_meta_opt_hdr_vers));
memcpy(&m->align,&p->opt_hdr_64.section_align,sizeof(struct pe_meta_opt_hdr_align));
memcpy(&m->img,&p->opt_hdr_64.size_of_image,sizeof(struct pe_meta_opt_hdr_img));
memcpy(&m->ldr,&p->opt_hdr_64.loader_flags,sizeof(struct pe_meta_opt_hdr_ldr));
if (m->ldr.rva_and_sizes > 0x10)
return PERK_BAD_IMAGE_TYPE;
else
memcpy(&m->dirs,&p->opt_hdr_64.export_tbl,sizeof(struct pe_meta_opt_hdr_dirs));
break;
default:
return PERK_BAD_IMAGE_TYPE;
};
#else
struct pe_opt_hdr_std * astd;
struct pe_opt_hdr_vers * avers;
struct pe_opt_hdr_align * aalign;
struct pe_opt_hdr_img * aimg;
struct pe_opt_hdr_ldr * aldr;
struct pe_opt_hdr_dirs * adirs;
size_t sdirs;
astd = (struct pe_opt_hdr_std *)p;
switch (m->std.magic) {
case PE_MAGIC_PE32:
avers = (struct pe_opt_hdr_vers *)&p->opt_hdr_32.major_os_ver;
aalign = (struct pe_opt_hdr_align *)&p->opt_hdr_32.section_align;
aimg = (struct pe_opt_hdr_img *)&p->opt_hdr_32.size_of_image;
aldr = (struct pe_opt_hdr_ldr *)&p->opt_hdr_32.loader_flags;
adirs = (struct pe_opt_hdr_dirs *)&p->opt_hdr_32.export_tbl;
break;
case PE_MAGIC_PE32_PLUS:
avers = (struct pe_opt_hdr_vers *)&p->opt_hdr_64.major_os_ver;
aalign = (struct pe_opt_hdr_align *)&p->opt_hdr_64.section_align;
aimg = (struct pe_opt_hdr_img *)&p->opt_hdr_64.size_of_image;
aldr = (struct pe_opt_hdr_ldr *)&p->opt_hdr_64.loader_flags;
adirs = (struct pe_opt_hdr_dirs *)&p->opt_hdr_64.export_tbl;
break;
default:
return PERK_BAD_IMAGE_TYPE;
}
/* std */
m->std.major_linker_ver = astd->major_linker_ver[0];
m->std.minor_linker_ver = astd->minor_linker_ver[0];
m->std.size_of_code = pe_read_long(astd->size_of_code);
m->std.size_of_initialized_data = pe_read_long(astd->size_of_initialized_data);
m->std.size_of_uninitialized_data = pe_read_long(astd->size_of_uninitialized_data);
m->std.entry_point = pe_read_long(astd->entry_point);
m->std.base_of_code = pe_read_long(astd->base_of_code);
/* vers */
m->vers.major_os_ver = pe_read_short(avers->major_os_ver);
m->vers.minor_os_ver = pe_read_short(avers->minor_os_ver);
m->vers.major_image_ver = pe_read_short(avers->major_image_ver);
m->vers.minor_image_ver = pe_read_short(avers->minor_image_ver);
m->vers.major_subsys_ver = pe_read_short(avers->major_subsys_ver);
m->vers.minor_subsys_ver = pe_read_short(avers->minor_subsys_ver);
m->vers.win32_ver = pe_read_long(avers->win32_ver);
/* align */
m->align.section_align = pe_read_long(aalign->section_align);
m->align.file_align = pe_read_long(aalign->file_align);
/* img */
m->img.size_of_image = pe_read_long(aimg->size_of_image);
m->img.size_of_headers = pe_read_long(aimg->size_of_headers);
m->img.checksum = pe_read_long(aimg->checksum);
m->img.subsystem = pe_read_short(aimg->subsystem);
m->img.dll_characteristics = pe_read_short(aimg->dll_characteristics);
/* ldr */
m->ldr.loader_flags = pe_read_long(aldr->loader_flags);
m->ldr.rva_and_sizes = pe_read_long(aldr->rva_and_sizes);
#endif
switch (m->std.magic) {
case PE_MAGIC_PE32:
m->mem.base_of_data = pe_read_long(p->opt_hdr_32.base_of_data);
m->mem.image_base = pe_read_long(p->opt_hdr_32.image_base);
m->mem.size_of_stack_reserve = pe_read_long(p->opt_hdr_32.size_of_stack_reserve);
m->mem.size_of_stack_commit = pe_read_long(p->opt_hdr_32.size_of_stack_commit);
m->mem.size_of_heap_reserve = pe_read_long(p->opt_hdr_32.size_of_heap_reserve);
m->mem.size_of_heap_commit = pe_read_long(p->opt_hdr_32.size_of_heap_commit);
break;
case PE_MAGIC_PE32_PLUS:
m->mem.base_of_data = (uint64_t)-1;
m->mem.image_base = pe_read_quad(p->opt_hdr_64.image_base);
m->mem.size_of_stack_reserve = pe_read_quad(p->opt_hdr_64.size_of_stack_reserve);
m->mem.size_of_stack_commit = pe_read_quad(p->opt_hdr_64.size_of_stack_commit);
m->mem.size_of_heap_reserve = pe_read_quad(p->opt_hdr_64.size_of_heap_reserve);
m->mem.size_of_heap_commit = pe_read_quad(p->opt_hdr_64.size_of_heap_commit);
break;
};
return 0;
}
|
