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wine/dlls/imagehlp/integrity.c
Eric Pouech 8b7beee065 imagehlp: Enable compilation with long types. 
Signed-off-by: Eric Pouech <eric.pouech@gmail.com>
Signed-off-by: Alexandre Julliard <julliard@winehq.org>
2022-02-11 10:58:42 +01:00

969 lines
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/*
* IMAGEHLP library
*
* Copyright 1998 Patrik Stridvall
* Copyright 2003 Mike McCormack
* Copyright 2009 Owen Rudge for CodeWeavers
* Copyright 2010 Juan Lang
* Copyright 2010 Andrey Turkin
*
* This library is free software; you can redistribute it and/or
* modify it under the terms of the GNU Lesser General Public
* License as published by the Free Software Foundation; either
* version 2.1 of the License, or (at your option) any later version.
*
* This library 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
* Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public
* License along with this library; if not, write to the Free Software
* Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301, USA
*/
#include <stdarg.h>
#include "windef.h"
#include "winbase.h"
#include "winerror.h"
#include "winternl.h"
#include "winnt.h"
#include "imagehlp.h"
#include "wine/debug.h"
WINE_DEFAULT_DEBUG_CHANNEL(imagehlp);
/*
* These functions are partially documented at:
* http://www.cs.auckland.ac.nz/~pgut001/pubs/authenticode.txt
*/
#define HDR_FAIL -1
#define HDR_NT32 0
#define HDR_NT64 1
/***********************************************************************
* IMAGEHLP_GetNTHeaders (INTERNAL)
*
* Return the IMAGE_NT_HEADERS for a PE file, after validating magic
* numbers and distinguishing between 32-bit and 64-bit files.
*/
static int IMAGEHLP_GetNTHeaders(HANDLE handle, DWORD *pe_offset, IMAGE_NT_HEADERS32 *nt32, IMAGE_NT_HEADERS64 *nt64)
{
IMAGE_DOS_HEADER dos_hdr;
DWORD count;
BOOL r;
TRACE("handle %p\n", handle);
if ((!nt32) || (!nt64))
return HDR_FAIL;
/* read the DOS header */
count = SetFilePointer(handle, 0, NULL, FILE_BEGIN);
if (count == INVALID_SET_FILE_POINTER)
return HDR_FAIL;
count = 0;
r = ReadFile(handle, &dos_hdr, sizeof dos_hdr, &count, NULL);
if (!r)
return HDR_FAIL;
if (count != sizeof dos_hdr)
return HDR_FAIL;
/* verify magic number of 'MZ' */
if (dos_hdr.e_magic != IMAGE_DOS_SIGNATURE)
return HDR_FAIL;
if (pe_offset != NULL)
*pe_offset = dos_hdr.e_lfanew;
/* read the PE header */
count = SetFilePointer(handle, dos_hdr.e_lfanew, NULL, FILE_BEGIN);
if (count == INVALID_SET_FILE_POINTER)
return HDR_FAIL;
count = 0;
r = ReadFile(handle, nt32, sizeof(IMAGE_NT_HEADERS32), &count, NULL);
if (!r)
return HDR_FAIL;
if (count != sizeof(IMAGE_NT_HEADERS32))
return HDR_FAIL;
/* verify NT signature */
if (nt32->Signature != IMAGE_NT_SIGNATURE)
return HDR_FAIL;
/* check if we have a 32-bit or 64-bit executable */
switch (nt32->OptionalHeader.Magic)
{
case IMAGE_NT_OPTIONAL_HDR32_MAGIC:
return HDR_NT32;
case IMAGE_NT_OPTIONAL_HDR64_MAGIC:
/* Re-read as 64-bit */
count = SetFilePointer(handle, dos_hdr.e_lfanew, NULL, FILE_BEGIN);
if (count == INVALID_SET_FILE_POINTER)
return HDR_FAIL;
count = 0;
r = ReadFile(handle, nt64, sizeof(IMAGE_NT_HEADERS64), &count, NULL);
if (!r)
return HDR_FAIL;
if (count != sizeof(IMAGE_NT_HEADERS64))
return HDR_FAIL;
/* verify NT signature */
if (nt64->Signature != IMAGE_NT_SIGNATURE)
return HDR_FAIL;
return HDR_NT64;
}
return HDR_FAIL;
}
/***********************************************************************
* IMAGEHLP_GetSecurityDirOffset (INTERNAL)
*
* Read a file's PE header, and return the offset and size of the
* security directory.
*/
static BOOL IMAGEHLP_GetSecurityDirOffset( HANDLE handle,
DWORD *pdwOfs, DWORD *pdwSize )
{
IMAGE_NT_HEADERS32 nt_hdr32;
IMAGE_NT_HEADERS64 nt_hdr64;
IMAGE_DATA_DIRECTORY *sd;
int ret;
ret = IMAGEHLP_GetNTHeaders(handle, NULL, &nt_hdr32, &nt_hdr64);
if (ret == HDR_NT32)
sd = &nt_hdr32.OptionalHeader.DataDirectory[IMAGE_FILE_SECURITY_DIRECTORY];
else if (ret == HDR_NT64)
sd = &nt_hdr64.OptionalHeader.DataDirectory[IMAGE_FILE_SECURITY_DIRECTORY];
else
return FALSE;
TRACE("ret = %d size = %lx addr = %lx\n", ret, sd->Size, sd->VirtualAddress);
*pdwSize = sd->Size;
*pdwOfs = sd->VirtualAddress;
return TRUE;
}
/***********************************************************************
* IMAGEHLP_SetSecurityDirOffset (INTERNAL)
*
* Read a file's PE header, and update the offset and size of the
* security directory.
*/
static BOOL IMAGEHLP_SetSecurityDirOffset(HANDLE handle,
DWORD dwOfs, DWORD dwSize)
{
IMAGE_NT_HEADERS32 nt_hdr32;
IMAGE_NT_HEADERS64 nt_hdr64;
IMAGE_DATA_DIRECTORY *sd;
int ret, nt_hdr_size = 0;
DWORD pe_offset;
void *nt_hdr;
DWORD count;
BOOL r;
ret = IMAGEHLP_GetNTHeaders(handle, &pe_offset, &nt_hdr32, &nt_hdr64);
if (ret == HDR_NT32)
{
sd = &nt_hdr32.OptionalHeader.DataDirectory[IMAGE_FILE_SECURITY_DIRECTORY];
nt_hdr = &nt_hdr32;
nt_hdr_size = sizeof(IMAGE_NT_HEADERS32);
}
else if (ret == HDR_NT64)
{
sd = &nt_hdr64.OptionalHeader.DataDirectory[IMAGE_FILE_SECURITY_DIRECTORY];
nt_hdr = &nt_hdr64;
nt_hdr_size = sizeof(IMAGE_NT_HEADERS64);
}
else
return FALSE;
sd->Size = dwSize;
sd->VirtualAddress = dwOfs;
TRACE("size = %lx addr = %lx\n", sd->Size, sd->VirtualAddress);
/* write the header back again */
count = SetFilePointer(handle, pe_offset, NULL, FILE_BEGIN);
if (count == INVALID_SET_FILE_POINTER)
return FALSE;
count = 0;
r = WriteFile(handle, nt_hdr, nt_hdr_size, &count, NULL);
if (!r)
return FALSE;
if (count != nt_hdr_size)
return FALSE;
return TRUE;
}
/***********************************************************************
* IMAGEHLP_GetCertificateOffset (INTERNAL)
*
* Read a file's PE header, and return the offset and size of the
* security directory.
*/
static BOOL IMAGEHLP_GetCertificateOffset( HANDLE handle, DWORD num,
DWORD *pdwOfs, DWORD *pdwSize )
{
DWORD size, count, offset, len, sd_VirtualAddr;
BOOL r;
r = IMAGEHLP_GetSecurityDirOffset( handle, &sd_VirtualAddr, &size );
if( !r )
return FALSE;
offset = 0;
/* take the n'th certificate */
while( 1 )
{
/* read the length of the current certificate */
count = SetFilePointer( handle, sd_VirtualAddr + offset,
NULL, FILE_BEGIN );
if( count == INVALID_SET_FILE_POINTER )
return FALSE;
r = ReadFile( handle, &len, sizeof len, &count, NULL );
if( !r )
return FALSE;
if( count != sizeof len )
return FALSE;
/* check the certificate is not too big or too small */
if( len < sizeof len )
return FALSE;
if( len > (size-offset) )
return FALSE;
if( !num-- )
break;
/* calculate the offset of the next certificate */
offset += len;
/* padded out to the nearest 8-byte boundary */
if( len % 8 )
offset += 8 - (len % 8);
if( offset >= size )
return FALSE;
}
*pdwOfs = sd_VirtualAddr + offset;
*pdwSize = len;
TRACE("len = %lx addr = %lx\n", len, sd_VirtualAddr + offset);
return TRUE;
}
/***********************************************************************
* IMAGEHLP_RecalculateChecksum (INTERNAL)
*
* Update the NT header checksum for the specified file.
*/
static BOOL IMAGEHLP_RecalculateChecksum(HANDLE handle)
{
DWORD FileLength, count, HeaderSum, pe_offset, nt_hdr_size;
IMAGE_NT_HEADERS32 nt_hdr32;
IMAGE_NT_HEADERS64 nt_hdr64;
LPVOID BaseAddress;
HANDLE hMapping;
DWORD *CheckSum;
void *nt_hdr;
int ret;
BOOL r;
TRACE("handle %p\n", handle);
ret = IMAGEHLP_GetNTHeaders(handle, &pe_offset, &nt_hdr32, &nt_hdr64);
if (ret == HDR_NT32)
{
CheckSum = &nt_hdr32.OptionalHeader.CheckSum;
nt_hdr = &nt_hdr32;
nt_hdr_size = sizeof(IMAGE_NT_HEADERS32);
}
else if (ret == HDR_NT64)
{
CheckSum = &nt_hdr64.OptionalHeader.CheckSum;
nt_hdr = &nt_hdr64;
nt_hdr_size = sizeof(IMAGE_NT_HEADERS64);
}
else
return FALSE;
hMapping = CreateFileMappingW(handle, NULL, PAGE_READONLY, 0, 0, NULL);
if (!hMapping)
return FALSE;
BaseAddress = MapViewOfFile(hMapping, FILE_MAP_READ, 0, 0, 0);
if (!BaseAddress)
{
CloseHandle(hMapping);
return FALSE;
}
FileLength = GetFileSize(handle, NULL);
*CheckSum = 0;
CheckSumMappedFile(BaseAddress, FileLength, &HeaderSum, CheckSum);
UnmapViewOfFile(BaseAddress);
CloseHandle(hMapping);
if (*CheckSum)
{
/* write the header back again */
count = SetFilePointer(handle, pe_offset, NULL, FILE_BEGIN);
if (count == INVALID_SET_FILE_POINTER)
return FALSE;
count = 0;
r = WriteFile(handle, nt_hdr, nt_hdr_size, &count, NULL);
if (!r)
return FALSE;
if (count != nt_hdr_size)
return FALSE;
return TRUE;
}
return FALSE;
}
/***********************************************************************
* ImageAddCertificate (IMAGEHLP.@)
*
* Adds the specified certificate to the security directory of
* open PE file.
*/
BOOL WINAPI ImageAddCertificate(
HANDLE FileHandle, LPWIN_CERTIFICATE Certificate, PDWORD Index)
{
DWORD size = 0, count = 0, offset = 0, sd_VirtualAddr = 0, index = 0;
WIN_CERTIFICATE hdr;
const size_t cert_hdr_size = sizeof hdr - sizeof hdr.bCertificate;
BOOL r;
TRACE("(%p, %p, %p)\n", FileHandle, Certificate, Index);
r = IMAGEHLP_GetSecurityDirOffset(FileHandle, &sd_VirtualAddr, &size);
/* If we've already got a security directory, find the end of it */
if ((r) && (sd_VirtualAddr != 0))
{
/* Check if the security directory is at the end of the file.
If not, we should probably relocate it. */
if (GetFileSize(FileHandle, NULL) != sd_VirtualAddr + size)
{
FIXME("Security directory already present but not located at EOF, not adding certificate\n");
SetLastError(ERROR_NOT_SUPPORTED);
return FALSE;
}
while (offset < size)
{
/* read the length of the current certificate */
count = SetFilePointer (FileHandle, sd_VirtualAddr + offset,
NULL, FILE_BEGIN);
if (count == INVALID_SET_FILE_POINTER)
return FALSE;
r = ReadFile(FileHandle, &hdr, cert_hdr_size, &count, NULL);
if (!r)
return FALSE;
if (count != cert_hdr_size)
return FALSE;
/* check the certificate is not too big or too small */
if (hdr.dwLength < cert_hdr_size)
return FALSE;
if (hdr.dwLength > (size-offset))
return FALSE;
/* next certificate */
offset += hdr.dwLength;
/* padded out to the nearest 8-byte boundary */
if (hdr.dwLength % 8)
offset += 8 - (hdr.dwLength % 8);
index++;
}
count = SetFilePointer (FileHandle, sd_VirtualAddr + offset, NULL, FILE_BEGIN);
if (count == INVALID_SET_FILE_POINTER)
return FALSE;
}
else
{
sd_VirtualAddr = SetFilePointer(FileHandle, 0, NULL, FILE_END);
if (sd_VirtualAddr == INVALID_SET_FILE_POINTER)
return FALSE;
}
/* Write the certificate to the file */
r = WriteFile(FileHandle, Certificate, Certificate->dwLength, &count, NULL);
if (!r)
return FALSE;
/* Pad out if necessary */
if (Certificate->dwLength % 8)
{
char null[8];
ZeroMemory(null, 8);
WriteFile(FileHandle, null, 8 - (Certificate->dwLength % 8), &count, NULL);
size += 8 - (Certificate->dwLength % 8);
}
size += Certificate->dwLength;
/* Update the security directory offset and size */
if (!IMAGEHLP_SetSecurityDirOffset(FileHandle, sd_VirtualAddr, size))
return FALSE;
if (!IMAGEHLP_RecalculateChecksum(FileHandle))
return FALSE;
if(Index)
*Index = index;
return TRUE;
}
/***********************************************************************
* ImageEnumerateCertificates (IMAGEHLP.@)
*/
BOOL WINAPI ImageEnumerateCertificates(
HANDLE handle, WORD TypeFilter, PDWORD CertificateCount,
PDWORD Indices, DWORD IndexCount)
{
DWORD size, count, offset, sd_VirtualAddr, index;
WIN_CERTIFICATE hdr;
const size_t cert_hdr_size = sizeof hdr - sizeof hdr.bCertificate;
BOOL r;
TRACE("%p %hd %p %p %ld\n",
handle, TypeFilter, CertificateCount, Indices, IndexCount);
r = IMAGEHLP_GetSecurityDirOffset( handle, &sd_VirtualAddr, &size );
if( !r )
return FALSE;
offset = 0;
index = 0;
*CertificateCount = 0;
while( offset < size )
{
/* read the length of the current certificate */
count = SetFilePointer( handle, sd_VirtualAddr + offset,
NULL, FILE_BEGIN );
if( count == INVALID_SET_FILE_POINTER )
return FALSE;
r = ReadFile( handle, &hdr, cert_hdr_size, &count, NULL );
if( !r )
return FALSE;
if( count != cert_hdr_size )
return FALSE;
TRACE("Size = %08lx id = %08hx\n",
hdr.dwLength, hdr.wCertificateType );
/* check the certificate is not too big or too small */
if( hdr.dwLength < cert_hdr_size )
return FALSE;
if( hdr.dwLength > (size-offset) )
return FALSE;
if( (TypeFilter == CERT_SECTION_TYPE_ANY) ||
(TypeFilter == hdr.wCertificateType) )
{
(*CertificateCount)++;
if(Indices && *CertificateCount <= IndexCount)
*Indices++ = index;
}
/* next certificate */
offset += hdr.dwLength;
/* padded out to the nearest 8-byte boundary */
if (hdr.dwLength % 8)
offset += 8 - (hdr.dwLength % 8);
index++;
}
return TRUE;
}
/***********************************************************************
* ImageGetCertificateData (IMAGEHLP.@)
*
* FIXME: not sure that I'm dealing with the Index the right way
*/
BOOL WINAPI ImageGetCertificateData(
HANDLE handle, DWORD Index,
LPWIN_CERTIFICATE Certificate, PDWORD RequiredLength)
{
DWORD r, offset, ofs, size, count;
TRACE("%p %ld %p %p\n", handle, Index, Certificate, RequiredLength);
if( !RequiredLength)
{
SetLastError( ERROR_INVALID_PARAMETER );
return FALSE;
}
if( !IMAGEHLP_GetCertificateOffset( handle, Index, &ofs, &size ) )
return FALSE;
if( *RequiredLength < size )
{
*RequiredLength = size;
SetLastError( ERROR_INSUFFICIENT_BUFFER );
return FALSE;
}
if( !Certificate )
{
SetLastError( ERROR_INVALID_PARAMETER );
return FALSE;
}
*RequiredLength = size;
offset = SetFilePointer( handle, ofs, NULL, FILE_BEGIN );
if( offset == INVALID_SET_FILE_POINTER )
return FALSE;
r = ReadFile( handle, Certificate, size, &count, NULL );
if( !r )
return FALSE;
if( count != size )
return FALSE;
TRACE("OK\n");
SetLastError( NO_ERROR );
return TRUE;
}
/***********************************************************************
* ImageGetCertificateHeader (IMAGEHLP.@)
*/
BOOL WINAPI ImageGetCertificateHeader(
HANDLE handle, DWORD index, LPWIN_CERTIFICATE pCert)
{
DWORD r, offset, ofs, size, count;
const size_t cert_hdr_size = sizeof *pCert - sizeof pCert->bCertificate;
TRACE("%p %ld %p\n", handle, index, pCert);
if( !IMAGEHLP_GetCertificateOffset( handle, index, &ofs, &size ) )
return FALSE;
if( size < cert_hdr_size )
return FALSE;
offset = SetFilePointer( handle, ofs, NULL, FILE_BEGIN );
if( offset == INVALID_SET_FILE_POINTER )
return FALSE;
r = ReadFile( handle, pCert, cert_hdr_size, &count, NULL );
if( !r )
return FALSE;
if( count != cert_hdr_size )
return FALSE;
TRACE("OK\n");
return TRUE;
}
/* Finds the section named section in the array of IMAGE_SECTION_HEADERs hdr. If
* found, returns the offset to the section. Otherwise returns 0. If the section
* is found, optionally returns the size of the section (in size) and the base
* address of the section (in base.)
*/
static DWORD IMAGEHLP_GetSectionOffset( IMAGE_SECTION_HEADER *hdr,
DWORD num_sections, LPCSTR section, PDWORD size, PDWORD base )
{
DWORD i, offset = 0;
for( i = 0; !offset && i < num_sections; i++, hdr++ )
{
if( !memcmp( hdr->Name, section, strlen(section) ) )
{
offset = hdr->PointerToRawData;
if( size )
*size = hdr->SizeOfRawData;
if( base )
*base = hdr->VirtualAddress;
}
}
return offset;
}
/* Calls DigestFunction e bytes at offset offset from the file mapped at map.
* Returns the return value of DigestFunction, or FALSE if the data is not available.
*/
static BOOL IMAGEHLP_ReportSectionFromOffset( DWORD offset, DWORD size,
BYTE *map, DWORD fileSize, DIGEST_FUNCTION DigestFunction, DIGEST_HANDLE DigestHandle )
{
if( offset + size > fileSize )
{
SetLastError(ERROR_INVALID_PARAMETER);
return FALSE;
}
return DigestFunction( DigestHandle, map + offset, size );
}
/* Finds the section named section among the IMAGE_SECTION_HEADERs in
* section_headers and calls DigestFunction for this section. Returns
* the return value from DigestFunction, or FALSE if the data could not be read.
*/
static BOOL IMAGEHLP_ReportSection( IMAGE_SECTION_HEADER *section_headers,
DWORD num_sections, LPCSTR section, BYTE *map, DWORD fileSize,
DIGEST_FUNCTION DigestFunction, DIGEST_HANDLE DigestHandle )
{
DWORD offset, size = 0;
offset = IMAGEHLP_GetSectionOffset( section_headers, num_sections, section,
&size, NULL );
if( !offset )
return FALSE;
return IMAGEHLP_ReportSectionFromOffset( offset, size, map, fileSize,
DigestFunction, DigestHandle );
}
/* Calls DigestFunction for all sections with the IMAGE_SCN_CNT_CODE flag set.
* Returns the return value from * DigestFunction, or FALSE if a section could not be read.
*/
static BOOL IMAGEHLP_ReportCodeSections( IMAGE_SECTION_HEADER *hdr, DWORD num_sections,
BYTE *map, DWORD fileSize, DIGEST_FUNCTION DigestFunction, DIGEST_HANDLE DigestHandle )
{
DWORD i;
BOOL ret = TRUE;
for( i = 0; ret && i < num_sections; i++, hdr++ )
{
if( hdr->Characteristics & IMAGE_SCN_CNT_CODE )
ret = IMAGEHLP_ReportSectionFromOffset( hdr->PointerToRawData,
hdr->SizeOfRawData, map, fileSize, DigestFunction, DigestHandle );
}
return ret;
}
/* Reports the import section from the file FileHandle. If
* CERT_PE_IMAGE_DIGEST_ALL_IMPORT_INFO is set in DigestLevel, reports the entire
* import section.
* FIXME: if it's not set, the function currently fails.
*/
static BOOL IMAGEHLP_ReportImportSection( IMAGE_SECTION_HEADER *hdr,
DWORD num_sections, BYTE *map, DWORD fileSize, DWORD DigestLevel,
DIGEST_FUNCTION DigestFunction, DIGEST_HANDLE DigestHandle )
{
BOOL ret = FALSE;
DWORD offset, size, base;
/* Get import data */
offset = IMAGEHLP_GetSectionOffset( hdr, num_sections, ".idata", &size,
&base );
if( !offset )
return FALSE;
/* If CERT_PE_IMAGE_DIGEST_ALL_IMPORT_INFO is set, the entire
* section is reported. Otherwise, the debug info section is
* decoded and reported piecemeal. See tests. However, I haven't been
* able to figure out how the native implementation decides which values
* to report. Either it's buggy or my understanding is flawed.
*/
if( DigestLevel & CERT_PE_IMAGE_DIGEST_ALL_IMPORT_INFO )
ret = IMAGEHLP_ReportSectionFromOffset( offset, size, map, fileSize,
DigestFunction, DigestHandle );
else
{
FIXME("not supported except for CERT_PE_IMAGE_DIGEST_ALL_IMPORT_INFO\n");
SetLastError(ERROR_INVALID_PARAMETER);
ret = FALSE;
}
return ret;
}
/***********************************************************************
* ImageGetDigestStream (IMAGEHLP.@)
*
* Gets a stream of bytes from a PE file over which a hash might be computed to
* verify that the image has not changed. Useful for creating a certificate to
* be added to the file with ImageAddCertificate.
*
* PARAMS
* FileHandle [In] File for which to return a stream.
* DigestLevel [In] Flags to control which portions of the file to return.
* 0 is allowed, as is any combination of:
* CERT_PE_IMAGE_DIGEST_ALL_IMPORT_INFO: reports the entire
* import section rather than selected portions of it.
* CERT_PE_IMAGE_DIGEST_DEBUG_INFO: reports the debug section.
* CERT_PE_IMAGE_DIGEST_RESOURCES: reports the resources
section.
* DigestFunction [In] Callback function.
* DigestHandle [In] Handle passed as first parameter to DigestFunction.
*
* RETURNS
* TRUE if successful.
* FALSE if unsuccessful. GetLastError returns more about the error.
*
* NOTES
* Only supports 32-bit PE files, not tested with any other format.
* Reports data in the following order:
* 1. The file headers are reported first
* 2. Any code sections are reported next.
* 3. The data (".data" and ".rdata") sections are reported next.
* 4. The import section is reported next.
* 5. If CERT_PE_IMAGE_DIGEST_DEBUG_INFO is set in DigestLevel, the debug section is
* reported next.
* 6. If CERT_PE_IMAGE_DIGEST_RESOURCES is set in DigestLevel, the resources section
* is reported next.
*
* BUGS
* CERT_PE_IMAGE_DIGEST_ALL_IMPORT_INFO must be specified, returns an error if not.
*/
BOOL WINAPI ImageGetDigestStream(
HANDLE FileHandle, DWORD DigestLevel,
DIGEST_FUNCTION DigestFunction, DIGEST_HANDLE DigestHandle)
{
DWORD error = 0;
BOOL ret = FALSE;
DWORD offset, size, num_sections, fileSize;
HANDLE hMap = INVALID_HANDLE_VALUE;
BYTE *map = NULL;
IMAGE_DOS_HEADER *dos_hdr;
IMAGE_NT_HEADERS *nt_hdr;
IMAGE_SECTION_HEADER *section_headers;
TRACE("(%p, %ld, %p, %p)\n", FileHandle, DigestLevel, DigestFunction,
DigestHandle);
/* Get the file size */
if( !FileHandle )
goto invalid_parameter;
fileSize = GetFileSize( FileHandle, NULL );
if(fileSize == INVALID_FILE_SIZE )
goto invalid_parameter;
/* map file */
hMap = CreateFileMappingW( FileHandle, NULL, PAGE_READONLY, 0, 0, NULL );
if( hMap == INVALID_HANDLE_VALUE )
goto invalid_parameter;
map = MapViewOfFile( hMap, FILE_MAP_COPY, 0, 0, 0 );
if( !map )
goto invalid_parameter;
/* Read the file header */
if( fileSize < sizeof(IMAGE_DOS_HEADER) )
goto invalid_parameter;
dos_hdr = (IMAGE_DOS_HEADER *)map;
if( dos_hdr->e_magic != IMAGE_DOS_SIGNATURE )
goto invalid_parameter;
offset = dos_hdr->e_lfanew;
if( !offset || offset > fileSize )
goto invalid_parameter;
ret = DigestFunction( DigestHandle, map, offset );
if( !ret )
goto end;
/* Read the NT header */
if( offset + sizeof(IMAGE_NT_HEADERS) > fileSize )
goto invalid_parameter;
nt_hdr = (IMAGE_NT_HEADERS *)(map + offset);
if( nt_hdr->Signature != IMAGE_NT_SIGNATURE )
goto invalid_parameter;
/* It's clear why the checksum is cleared, but why only these size headers?
*/
nt_hdr->OptionalHeader.SizeOfInitializedData = 0;
nt_hdr->OptionalHeader.SizeOfImage = 0;
nt_hdr->OptionalHeader.CheckSum = 0;
size = sizeof(nt_hdr->Signature) + sizeof(nt_hdr->FileHeader) +
nt_hdr->FileHeader.SizeOfOptionalHeader;
ret = DigestFunction( DigestHandle, map + offset, size );
if( !ret )
goto end;
/* Read the section headers */
offset += size;
num_sections = nt_hdr->FileHeader.NumberOfSections;
size = num_sections * sizeof(IMAGE_SECTION_HEADER);
if( offset + size > fileSize )
goto invalid_parameter;
ret = DigestFunction( DigestHandle, map + offset, size );
if( !ret )
goto end;
section_headers = (IMAGE_SECTION_HEADER *)(map + offset);
IMAGEHLP_ReportCodeSections( section_headers, num_sections,
map, fileSize, DigestFunction, DigestHandle );
IMAGEHLP_ReportSection( section_headers, num_sections, ".data",
map, fileSize, DigestFunction, DigestHandle );
IMAGEHLP_ReportSection( section_headers, num_sections, ".rdata",
map, fileSize, DigestFunction, DigestHandle );
IMAGEHLP_ReportImportSection( section_headers, num_sections,
map, fileSize, DigestLevel, DigestFunction, DigestHandle );
if( DigestLevel & CERT_PE_IMAGE_DIGEST_DEBUG_INFO )
IMAGEHLP_ReportSection( section_headers, num_sections, ".debug",
map, fileSize, DigestFunction, DigestHandle );
if( DigestLevel & CERT_PE_IMAGE_DIGEST_RESOURCES )
IMAGEHLP_ReportSection( section_headers, num_sections, ".rsrc",
map, fileSize, DigestFunction, DigestHandle );
end:
if( map )
UnmapViewOfFile( map );
if( hMap != INVALID_HANDLE_VALUE )
CloseHandle( hMap );
if( error )
SetLastError(error);
return ret;
invalid_parameter:
error = ERROR_INVALID_PARAMETER;
goto end;
}
/***********************************************************************
* ImageRemoveCertificate (IMAGEHLP.@)
*/
BOOL WINAPI ImageRemoveCertificate(HANDLE FileHandle, DWORD Index)
{
DWORD size = 0, count = 0, sd_VirtualAddr = 0, offset = 0;
DWORD data_size = 0, cert_size = 0, cert_size_padded = 0, ret = 0;
LPVOID cert_data;
BOOL r;
TRACE("(%p, %ld)\n", FileHandle, Index);
r = ImageEnumerateCertificates(FileHandle, CERT_SECTION_TYPE_ANY, &count, NULL, 0);
if ((!r) || (count == 0))
return FALSE;
if ((!IMAGEHLP_GetSecurityDirOffset(FileHandle, &sd_VirtualAddr, &size)) ||
(!IMAGEHLP_GetCertificateOffset(FileHandle, Index, &offset, &cert_size)))
return FALSE;
/* Ignore any padding we have, too */
if (cert_size % 8)
cert_size_padded = cert_size + (8 - (cert_size % 8));
else
cert_size_padded = cert_size;
data_size = size - (offset - sd_VirtualAddr) - cert_size_padded;
if (data_size == 0)
{
ret = SetFilePointer(FileHandle, sd_VirtualAddr, NULL, FILE_BEGIN);
if (ret == INVALID_SET_FILE_POINTER)
return FALSE;
}
else
{
cert_data = HeapAlloc(GetProcessHeap(), HEAP_ZERO_MEMORY, data_size);
if (!cert_data)
return FALSE;
ret = SetFilePointer(FileHandle, offset + cert_size_padded, NULL, FILE_BEGIN);
if (ret == INVALID_SET_FILE_POINTER)
goto error;
/* Read any subsequent certificates */
r = ReadFile(FileHandle, cert_data, data_size, &count, NULL);
if ((!r) || (count != data_size))
goto error;
SetFilePointer(FileHandle, offset, NULL, FILE_BEGIN);
/* Write them one index back */
r = WriteFile(FileHandle, cert_data, data_size, &count, NULL);
if ((!r) || (count != data_size))
goto error;
HeapFree(GetProcessHeap(), 0, cert_data);
}
/* If security directory is at end of file, trim the file */
if (GetFileSize(FileHandle, NULL) == sd_VirtualAddr + size)
SetEndOfFile(FileHandle);
if (count == 1)
r = IMAGEHLP_SetSecurityDirOffset(FileHandle, 0, 0);
else
r = IMAGEHLP_SetSecurityDirOffset(FileHandle, sd_VirtualAddr, size - cert_size_padded);
if (!r)
return FALSE;
if (!IMAGEHLP_RecalculateChecksum(FileHandle))
return FALSE;
return TRUE;
error:
HeapFree(GetProcessHeap(), 0, cert_data);
return FALSE;
}
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