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MemoryModule/tests/LoadDll.cpp at master · binarymaster/MemoryModule · GitHub
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LoadDll.cpp
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#
define
WIN32_LEAN_AND_MEAN
#
ifndef
_CRT_SECURE_NO_WARNINGS
#
define
_CRT_SECURE_NO_WARNINGS
#
endif
#
include
<
assert.h
>
#
include
<
windows.h
>
#
include
<
tchar.h
>
#
include
<
stdio.h
>
#
include
<
malloc.h
>
#
include
"
../MemoryModule.h
"
typedef
int
(*addNumberProc)(
int
,
int
);
//
Thanks to Tim Cooper (from http://stackoverflow.com/a/8584708)
const
char
*
sstrstr
(
const
char
*haystack,
const
char
*needle,
size_t
length) {
size_t
needle_length =
strlen
(needle);
size_t
i;
for
(i =
0
; i < length; i++) {
if
(i + needle_length > length) {
return
NULL
;
}
if
(
strncmp
(&haystack[i], needle, needle_length) ==
0
) {
return
&haystack[i];
}
}
return
NULL
;
}
const
wchar_t
*
swcsstr
(
const
wchar_t
*haystack,
const
wchar_t
*needle,
size_t
length) {
size_t
needle_length =
wcslen
(needle);
size_t
i;
for
(i =
0
; i < length; i++) {
if
(i + needle_length > length) {
return
NULL
;
}
if
(
wcsncmp
(&haystack[i], needle, needle_length) ==
0
) {
return
&haystack[i];
}
}
return
NULL
;
}
BOOL
CheckResourceStrings
(
LPVOID
data,
DWORD
size,
const
char
*first,
const
wchar_t
*second) {
const
char
*first_pos;
const
wchar_t
*second_pos;
const
wchar_t
*src;
if
(data ==
NULL
|| size ==
0
) {
return
FALSE
;
}
first_pos =
sstrstr
((
const
char
*) data, first, size);
if
(first_pos ==
NULL
) {
fprintf
(stderr,
"
ERROR: data doesn't start with %s
\n
"
, first);
return
FALSE
;
}
src = (
const
wchar_t
*) (((
const
char
*) data) +
strlen
(first) +
1
);
second_pos =
swcsstr
(src, second, (size -
strlen
(first) -
1
) /
sizeof
(
wchar_t
));
if
(second_pos ==
NULL
) {
fwprintf
(stderr,
L"
ERROR: data doesn't continue with %s
\n
"
, second);
return
FALSE
;
}
return
TRUE
;
}
BOOL
LoadFromMemory
(
char
*filename)
{
FILE
*fp;
unsigned
char
*data=
NULL
;
long
size;
size_t
read;
HMEMORYMODULE
handle =
NULL
;
addNumberProc addNumber;
addNumberProc addNumber2;
HMEMORYRSRC
resourceInfo;
DWORD
resourceSize;
LPVOID
resourceData;
TCHAR
buffer[
100
];
BOOL
result =
TRUE
;
fp =
fopen
(filename,
"
rb
"
);
if
(fp ==
NULL
)
{
printf
(
"
Can't open DLL file
\"
%s
\"
.
"
, filename);
result =
FALSE
;
goto
exit;
}
fseek
(fp,
0
,
SEEK_END
);
size =
ftell
(fp);
assert
(size >
0
);
data = (
unsigned
char
*)
malloc
(size);
assert
(data !=
NULL
);
fseek
(fp,
0
,
SEEK_SET
);
read =
fread
(data,
1
, size, fp);
assert
(read ==
static_cast
<
size_t
>(size));
fclose
(fp);
handle =
MemoryLoadLibrary
(data, size);
if
(handle ==
NULL
)
{
_tprintf
(
_T
(
"
Can't load library from memory.
\n
"
));
result =
FALSE
;
goto
exit;
}
addNumber = (addNumberProc)
MemoryGetProcAddress
(handle,
NULL
);
if
(addNumber !=
NULL
) {
_tprintf
(
_T
(
"
MemoryGetProcAddress(NULL) returned %p
\n
"
), addNumber);
result =
FALSE
;
goto
exit;
}
addNumber = (addNumberProc)
MemoryGetProcAddress
(handle,
reinterpret_cast
<
LPCSTR
>(
0xff
));
if
(addNumber !=
NULL
) {
_tprintf
(
_T
(
"
MemoryGetProcAddress(0xff) returned %p
\n
"
), addNumber);
result =
FALSE
;
goto
exit;
}
addNumber = (addNumberProc)
MemoryGetProcAddress
(handle,
"
addNumbers
"
);
_tprintf
(
_T
(
"
From memory: %d
\n
"
),
addNumber
(
1
,
2
));
//
the DLL only exports one function, try to load by ordinal value
addNumber2 = (addNumberProc)
MemoryGetProcAddress
(handle,
reinterpret_cast
<
LPCSTR
>(
0x01
));
if
(addNumber != addNumber2) {
_tprintf
(
_T
(
"
MemoryGetProcAddress(0x01) returned %p (expected %p)
\n
"
), addNumber2, addNumber);
result =
FALSE
;
goto
exit;
}
resourceInfo =
MemoryFindResource
(handle,
MAKEINTRESOURCE
(
VS_VERSION_INFO
),
RT_VERSION
);
_tprintf
(
_T
(
"
MemoryFindResource returned 0x%p
\n
"
), resourceInfo);
if
(resourceInfo !=
NULL
) {
resourceSize =
MemorySizeofResource
(handle, resourceInfo);
resourceData =
MemoryLoadResource
(handle, resourceInfo);
_tprintf
(
_T
(
"
Memory resource data: %ld bytes at 0x%p
\n
"
), resourceSize, resourceData);
MemoryLoadString
(handle,
1
, buffer,
sizeof
(buffer));
_tprintf
(
_T
(
"
String1: %s
\n
"
), buffer);
MemoryLoadString
(handle,
20
, buffer,
sizeof
(buffer));
_tprintf
(
_T
(
"
String2: %s
\n
"
), buffer);
}
else
{
result =
FALSE
;
}
resourceInfo =
MemoryFindResource
(handle,
_T
(
"
stringres
"
),
RT_RCDATA
);
_tprintf
(
_T
(
"
MemoryFindResource returned 0x%p
\n
"
), resourceInfo);
if
(resourceInfo !=
NULL
) {
resourceSize =
MemorySizeofResource
(handle, resourceInfo);
resourceData =
MemoryLoadResource
(handle, resourceInfo);
_tprintf
(
_T
(
"
Memory resource data: %ld bytes at 0x%p
\n
"
), resourceSize, resourceData);
if
(!
CheckResourceStrings
(resourceData, resourceSize,
"
This is a ANSI string
"
,
L"
This is a UNICODE string
"
)) {
result =
FALSE
;
}
}
else
{
result =
FALSE
;
}
resourceInfo =
MemoryFindResource
(handle,
_T
(
"
stringres1
"
),
RT_RCDATA
);
_tprintf
(
_T
(
"
MemoryFindResource returned 0x%p
\n
"
), resourceInfo);
if
(resourceInfo !=
NULL
) {
resourceSize =
MemorySizeofResource
(handle, resourceInfo);
resourceData =
MemoryLoadResource
(handle, resourceInfo);
_tprintf
(
_T
(
"
Memory resource data: %ld bytes at 0x%p
\n
"
), resourceSize, resourceData);
if
(!
CheckResourceStrings
(resourceData, resourceSize,
"
This is ANSI string 1
"
,
L"
This is UNICODE string 1
"
)) {
result =
FALSE
;
}
}
else
{
result =
FALSE
;
}
resourceInfo =
MemoryFindResource
(handle,
_T
(
"
stringres2
"
),
RT_RCDATA
);
_tprintf
(
_T
(
"
MemoryFindResource returned 0x%p
\n
"
), resourceInfo);
if
(resourceInfo !=
NULL
) {
resourceSize =
MemorySizeofResource
(handle, resourceInfo);
resourceData =
MemoryLoadResource
(handle, resourceInfo);
_tprintf
(
_T
(
"
Memory resource data: %ld bytes at 0x%p
\n
"
), resourceSize, resourceData);
if
(!
CheckResourceStrings
(resourceData, resourceSize,
"
This is ANSI string 2
"
,
L"
This is UNICODE string 2
"
)) {
result =
FALSE
;
}
}
else
{
result =
FALSE
;
}
resourceInfo =
MemoryFindResource
(handle,
_T
(
"
stringres3
"
),
RT_RCDATA
);
_tprintf
(
_T
(
"
MemoryFindResource returned 0x%p
\n
"
), resourceInfo);
if
(resourceInfo !=
NULL
) {
resourceSize =
MemorySizeofResource
(handle, resourceInfo);
resourceData =
MemoryLoadResource
(handle, resourceInfo);
_tprintf
(
_T
(
"
Memory resource data: %ld bytes at 0x%p
\n
"
), resourceSize, resourceData);
if
(!
CheckResourceStrings
(resourceData, resourceSize,
"
This is ANSI string 3
"
,
L"
This is UNICODE string 3
"
)) {
result =
FALSE
;
}
}
else
{
result =
FALSE
;
}
exit:
MemoryFreeLibrary
(handle);
free
(data);
return
result;
}
int
main
(
int
argc,
char
* argv[])
{
if
(argc <
2
) {
fprintf
(stderr,
"
USAGE: %s <filename.dll>
\n
"
, argv[
0
]);
return
1
;
}
if
(!
LoadFromMemory
(argv[
1
])) {
return
2
;
}
return
0
;
}
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