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wine
wine-winehq
Commits
758c3841
Commit
758c3841
authored
Nov 25, 2000
by
Eric Kohl
Committed by
Alexandre Julliard
Nov 25, 2000
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Plain Diff
Implemented PE file checksum calculation.
parent
7379b891
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Showing
1 changed file
with
180 additions
and
6 deletions
+180
-6
modify.c
dlls/imagehlp/modify.c
+180
-6
No files found.
dlls/imagehlp/modify.c
View file @
758c3841
...
...
@@ -12,6 +12,9 @@
DEFAULT_DEBUG_CHANNEL
(
imagehlp
);
static
WORD
CalcCheckSum
(
DWORD
StartValue
,
LPVOID
BaseAddress
,
DWORD
WordCount
);
/***********************************************************************
* BindImage (IMAGEHLP.@)
*/
...
...
@@ -36,6 +39,33 @@ BOOL WINAPI BindImageEx(
return
FALSE
;
}
/***********************************************************************
* CheckSum (internal)
*/
static
WORD
CalcCheckSum
(
DWORD
StartValue
,
LPVOID
BaseAddress
,
DWORD
WordCount
)
{
LPWORD
Ptr
;
DWORD
Sum
;
DWORD
i
;
Sum
=
StartValue
;
Ptr
=
(
LPWORD
)
BaseAddress
;
for
(
i
=
0
;
i
<
WordCount
;
i
++
)
{
Sum
+=
*
Ptr
;
if
(
HIWORD
(
Sum
)
!=
0
)
{
Sum
=
LOWORD
(
Sum
)
+
HIWORD
(
Sum
);
}
Ptr
++
;
}
return
(
WORD
)(
LOWORD
(
Sum
)
+
HIWORD
(
Sum
));
}
/***********************************************************************
* CheckSumMappedFile (IMAGEHLP.@)
*/
...
...
@@ -43,11 +73,49 @@ PIMAGE_NT_HEADERS WINAPI CheckSumMappedFile(
LPVOID
BaseAddress
,
DWORD
FileLength
,
LPDWORD
HeaderSum
,
LPDWORD
CheckSum
)
{
PIMAGE_NT_HEADERS
Header
;
DWORD
CalcSum
;
DWORD
HdrSum
;
FIXME
(
"(%p, %ld, %p, %p): stub
\n
"
,
BaseAddress
,
FileLength
,
HeaderSum
,
CheckSum
);
SetLastError
(
ERROR_CALL_NOT_IMPLEMENTED
);
return
NULL
;
CalcSum
=
(
DWORD
)
CalcCheckSum
(
0
,
BaseAddress
,
(
FileLength
+
1
)
/
sizeof
(
WORD
));
Header
=
ImageNtHeader
(
BaseAddress
);
HdrSum
=
Header
->
OptionalHeader
.
CheckSum
;
/* Subtract image checksum from calculated checksum. */
/* fix low word of checksum */
if
(
LOWORD
(
CalcSum
)
>=
LOWORD
(
HdrSum
))
{
CalcSum
-=
LOWORD
(
HdrSum
);
}
else
{
CalcSum
=
((
LOWORD
(
CalcSum
)
-
LOWORD
(
HdrSum
))
&
0xFFFF
)
-
1
;
}
/* fix high word of checksum */
if
(
LOWORD
(
CalcSum
)
>=
HIWORD
(
HdrSum
))
{
CalcSum
-=
HIWORD
(
HdrSum
);
}
else
{
CalcSum
=
((
LOWORD
(
CalcSum
)
-
HIWORD
(
HdrSum
))
&
0xFFFF
)
-
1
;
}
/* add file length */
CalcSum
+=
FileLength
;
*
CheckSum
=
CalcSum
;
*
HeaderSum
=
Header
->
OptionalHeader
.
CheckSum
;
return
Header
;
}
/***********************************************************************
...
...
@@ -56,24 +124,130 @@ PIMAGE_NT_HEADERS WINAPI CheckSumMappedFile(
DWORD
WINAPI
MapFileAndCheckSumA
(
LPSTR
Filename
,
LPDWORD
HeaderSum
,
LPDWORD
CheckSum
)
{
FIXME
(
"(%s, %p, %p): stub
\n
"
,
HANDLE
hFile
;
HANDLE
hMapping
;
LPVOID
BaseAddress
;
DWORD
FileLength
;
TRACE
(
"(%s, %p, %p): stub
\n
"
,
debugstr_a
(
Filename
),
HeaderSum
,
CheckSum
);
SetLastError
(
ERROR_CALL_NOT_IMPLEMENTED
);
hFile
=
CreateFileA
(
Filename
,
GENERIC_READ
,
FILE_SHARE_READ
|
FILE_SHARE_WRITE
,
NULL
,
OPEN_EXISTING
,
FILE_ATTRIBUTE_NORMAL
,
0
);
if
(
hFile
==
INVALID_HANDLE_VALUE
)
{
return
CHECKSUM_OPEN_FAILURE
;
}
hMapping
=
CreateFileMappingW
(
hFile
,
NULL
,
PAGE_READONLY
,
0
,
0
,
NULL
);
if
(
hMapping
==
0
)
{
CloseHandle
(
hFile
);
return
CHECKSUM_MAP_FAILURE
;
}
BaseAddress
=
MapViewOfFile
(
hMapping
,
FILE_MAP_READ
,
0
,
0
,
0
);
if
(
hMapping
==
0
)
{
CloseHandle
(
hMapping
);
CloseHandle
(
hFile
);
return
CHECKSUM_MAPVIEW_FAILURE
;
}
FileLength
=
GetFileSize
(
hFile
,
NULL
);
CheckSumMappedFile
(
BaseAddress
,
FileLength
,
HeaderSum
,
CheckSum
);
UnmapViewOfFile
(
BaseAddress
);
CloseHandle
(
hMapping
);
CloseHandle
(
hFile
);
return
0
;
}
/***********************************************************************
* MapFileAndCheckSumW (IMAGEHLP.@)
*/
DWORD
WINAPI
MapFileAndCheckSumW
(
LPWSTR
Filename
,
LPDWORD
HeaderSum
,
LPDWORD
CheckSum
)
{
FIXME
(
"(%s, %p, %p): stub
\n
"
,
HANDLE
hFile
;
HANDLE
hMapping
;
LPVOID
BaseAddress
;
DWORD
FileLength
;
TRACE
(
"(%s, %p, %p): stub
\n
"
,
debugstr_w
(
Filename
),
HeaderSum
,
CheckSum
);
SetLastError
(
ERROR_CALL_NOT_IMPLEMENTED
);
hFile
=
CreateFileW
(
Filename
,
GENERIC_READ
,
FILE_SHARE_READ
|
FILE_SHARE_WRITE
,
NULL
,
OPEN_EXISTING
,
FILE_ATTRIBUTE_NORMAL
,
0
);
if
(
hFile
==
INVALID_HANDLE_VALUE
)
{
return
CHECKSUM_OPEN_FAILURE
;
}
hMapping
=
CreateFileMappingW
(
hFile
,
NULL
,
PAGE_READONLY
,
0
,
0
,
NULL
);
if
(
hMapping
==
0
)
{
CloseHandle
(
hFile
);
return
CHECKSUM_MAP_FAILURE
;
}
BaseAddress
=
MapViewOfFile
(
hMapping
,
FILE_MAP_READ
,
0
,
0
,
0
);
if
(
hMapping
==
0
)
{
CloseHandle
(
hMapping
);
CloseHandle
(
hFile
);
return
CHECKSUM_MAPVIEW_FAILURE
;
}
FileLength
=
GetFileSize
(
hFile
,
NULL
);
CheckSumMappedFile
(
BaseAddress
,
FileLength
,
HeaderSum
,
CheckSum
);
UnmapViewOfFile
(
BaseAddress
);
CloseHandle
(
hMapping
);
CloseHandle
(
hFile
);
return
0
;
}
/***********************************************************************
...
...
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