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big-endian compatibility for generate_unicons_offsets

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also a bit refactored using methods from CResourceEditor


git-svn-id: https://svn.code.sf.net/p/nsis/code/NSIS/trunk@4618 212acab6-be3b-0410-9dea-997c60f758d6
This commit is contained in:
kichik 2006-03-25 19:30:45 +00:00
parent eebbf93155
commit 3697599cb4
2 changed files with 38 additions and 47 deletions
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81
Source/util.cpp
View file

@ -280,66 +280,56 @@ unsigned char* generate_uninstall_icon_data(const char* filename, size_t &size)
int find_in_dir(PRESOURCE_DIRECTORY rd, WORD id) {
WORD i = FIX_ENDIAN_INT16(rd->Header.NumberOfNamedEntries);
WORD l = FIX_ENDIAN_INT16(rd->Header.NumberOfNamedEntries + rd->Header.NumberOfIdEntries);
WORD l = i + FIX_ENDIAN_INT16(rd->Header.NumberOfIdEntries);
for (; i < l; i++) {
if (FIX_ENDIAN_INT16(rd->Entries[i].Id) == id) {
return i;
}
}
return -1;
}
// Fill the array of icons for uninstall with their offsets
// Returns 0 if failed, anything else is the icon offset in the PE.
int generate_unicons_offsets(unsigned char* exeHeader, unsigned char* uninstIconData) {
int i;
// Returns zero on failure
int generate_unicons_offsets(unsigned char* exeHeader, size_t exeHeaderSize, unsigned char* uninstIconData) {
DWORD dwResourceSectionVA;
MY_ASSERT(PIMAGE_DOS_HEADER(exeHeader)->e_magic != IMAGE_DOS_SIGNATURE, "invalid dos header");
PIMAGE_NT_HEADERS ntHeaders = PIMAGE_NT_HEADERS(exeHeader + PIMAGE_DOS_HEADER(exeHeader)->e_lfanew);
MY_ASSERT(ntHeaders->Signature != IMAGE_NT_SIGNATURE, "invalid nt headers");
DWORD dwResourceSectionVA = ntHeaders->OptionalHeader.DataDirectory[IMAGE_DIRECTORY_ENTRY_RESOURCE].VirtualAddress;
PIMAGE_SECTION_HEADER sectionHeadersArray = IMAGE_FIRST_SECTION(ntHeaders);
for (i = 0; i < ntHeaders->FileHeader.NumberOfSections; i++)
if (dwResourceSectionVA == sectionHeadersArray[i].VirtualAddress)
break;
MY_ASSERT(i == ntHeaders->FileHeader.NumberOfSections, "can't find resource section");
PRESOURCE_DIRECTORY rdRoot = PRESOURCE_DIRECTORY(exeHeader + sectionHeadersArray[i].PointerToRawData);
int iNextSection;
if (i == ntHeaders->FileHeader.NumberOfSections - 1)
iNextSection = (int)ntHeaders->OptionalHeader.SizeOfImage;
else
iNextSection = (int)sectionHeadersArray[i+1].PointerToRawData;
MY_ASSERT((long)rdRoot - (long)exeHeader > iNextSection, "corrupted EXE - invalid pointer");
PIMAGE_NT_HEADERS ntHeaders = CResourceEditor::GetNTHeaders(exeHeader);
PRESOURCE_DIRECTORY rdRoot = CResourceEditor::GetResourceDirectory(exeHeader, exeHeaderSize, ntHeaders, &dwResourceSectionVA);
int idx = find_in_dir(rdRoot, (WORD) (long) RT_ICON);
MY_ASSERT(idx == -1, "no icons?!");
MY_ASSERT(!rdRoot->Entries[idx].DirectoryOffset.DataIsDirectory, "bad resource directory");
MY_ASSERT(idx < 0, "no icons found");
MY_IMAGE_RESOURCE_DIRECTORY_ENTRY rdEntry = rdRoot->Entries[idx];
FIX_ENDIAN_INT32_INPLACE(rdEntry.OffsetToData);
MY_ASSERT(!rdEntry.DirectoryOffset.DataIsDirectory, "bad resource directory");
PRESOURCE_DIRECTORY rdIcons = PRESOURCE_DIRECTORY(rdRoot->Entries[idx].DirectoryOffset.OffsetToDirectory + DWORD(rdRoot));
PRESOURCE_DIRECTORY rdIcons = PRESOURCE_DIRECTORY(rdEntry.DirectoryOffset.OffsetToDirectory + DWORD(rdRoot));
MY_ASSERT((long)rdIcons - (long)exeHeader > iNextSection, "corrupted EXE - invalid pointer");
MY_ASSERT((size_t)rdIcons - (size_t)exeHeader > exeHeaderSize, "corrupted EXE - invalid pointer");
MY_ASSERT(rdIcons->Header.NumberOfIdEntries == 0, "no icons found");
WORD wNumberOfEntries = FIX_ENDIAN_INT16(rdIcons->Header.NumberOfIdEntries);
for (i = 0; i < rdIcons->Header.NumberOfIdEntries; i++) { // Icons dir can't have named entries
MY_ASSERT(!rdIcons->Entries[i].DirectoryOffset.DataIsDirectory, "bad resource directory");
PRESOURCE_DIRECTORY rd = PRESOURCE_DIRECTORY(rdIcons->Entries[i].DirectoryOffset.OffsetToDirectory + DWORD(rdRoot));
MY_ASSERT(wNumberOfEntries == 0, "no icons found");
MY_ASSERT((long)rd - (long)exeHeader > iNextSection, "corrupted EXE - invalid pointer");
MY_ASSERT(rd->Entries[0].DirectoryOffset.DataIsDirectory, "bad resource directory");
for (WORD i = 0; i < wNumberOfEntries; i++) { // Icons dir can't have named entries
MY_IMAGE_RESOURCE_DIRECTORY_ENTRY icoEntry = rdIcons->Entries[i];
FIX_ENDIAN_INT32_INPLACE(icoEntry.OffsetToData);
PIMAGE_RESOURCE_DATA_ENTRY rde = PIMAGE_RESOURCE_DATA_ENTRY(rd->Entries[0].OffsetToData + DWORD(rdRoot));
MY_ASSERT(!icoEntry.DirectoryOffset.DataIsDirectory, "bad resource directory");
PRESOURCE_DIRECTORY rd = PRESOURCE_DIRECTORY(icoEntry.DirectoryOffset.OffsetToDirectory + DWORD(rdRoot));
MY_ASSERT((long)rde - (long)exeHeader > iNextSection, "corrupted EXE - invalid pointer");
MY_ASSERT((size_t)rd - (size_t)exeHeader > exeHeaderSize, "corrupted EXE - invalid pointer");
MY_IMAGE_RESOURCE_DIRECTORY_ENTRY datEntry = rd->Entries[0];
FIX_ENDIAN_INT32_INPLACE(datEntry.OffsetToData);
MY_ASSERT(datEntry.DirectoryOffset.DataIsDirectory, "bad resource directory");
PIMAGE_RESOURCE_DATA_ENTRY rde = PIMAGE_RESOURCE_DATA_ENTRY(datEntry.OffsetToData + DWORD(rdRoot));
MY_ASSERT((size_t)rde - (size_t)exeHeader > exeHeaderSize, "corrupted EXE - invalid pointer");
// find icon to replace
LPBYTE seeker = uninstIconData;
@ -351,16 +341,17 @@ int generate_unicons_offsets(unsigned char* exeHeader, unsigned char* uninstIcon
if (!dwOffset && dwSize == rde->Size)
break;
seeker += dwSize + sizeof(DWORD);
seeker += FIX_ENDIAN_INT32(dwSize) + sizeof(DWORD);
// reached the end of the list and no match
MY_ASSERT(!*seeker, "installer, uninstaller icon size mismatch - see the Icon instruction's documentation for more information");
}
// Set offset
*(LPDWORD) seeker = rde->OffsetToData + DWORD(rdRoot) - dwResourceSectionVA - DWORD(exeHeader);
DWORD dwOffset = FIX_ENDIAN_INT32(rde->OffsetToData) + DWORD(rdRoot) - dwResourceSectionVA - DWORD(exeHeader);
*(LPDWORD) seeker = FIX_ENDIAN_INT32(dwOffset);
MY_ASSERT(*(int*)seeker > iNextSection || *(int*)seeker < (long)rdRoot - (long)exeHeader, "invalid data offset - icon resource probably compressed");
MY_ASSERT(dwOffset > exeHeaderSize || dwOffset < (DWORD)rdRoot - (DWORD)exeHeader, "invalid data offset - icon resource probably compressed");
}
LPBYTE seeker = uninstIconData;
@ -371,10 +362,10 @@ int generate_unicons_offsets(unsigned char* exeHeader, unsigned char* uninstIcon
seeker += sizeof(DWORD);
// offset isn't set which means we found no match for this one
MY_ASSERT(!dwOffset, "installer, uninstaller number of icons doesn't match - see the Icon instruction's documentation for more information");
seeker += dwSize;
seeker += FIX_ENDIAN_INT32(dwSize);
}
return PIMAGE_RESOURCE_DATA_ENTRY(PRESOURCE_DIRECTORY(rdIcons->Entries[0].DirectoryOffset.OffsetToDirectory + DWORD(rdRoot))->Entries[0].OffsetToData + DWORD(rdRoot))->OffsetToData + DWORD(rdRoot) - dwResourceSectionVA - DWORD(exeHeader);
return 1;
}
#endif // NSIS_CONFIG_UNINSTALL_SUPPORT

2
Source/util.h
View file

@ -28,7 +28,7 @@ void replace_icon(CResourceEditor* re, WORD wIconId, const char* filename);
// returns the data of the uninstaller icon (inside filename) that should replace the installer icon data
unsigned char* generate_uninstall_icon_data(const char* filename, size_t &size);
// Fill the array of icons for uninstall with their offsets
int generate_unicons_offsets(unsigned char* exeHeader, unsigned char* uninstIconData);
int generate_unicons_offsets(unsigned char* exeHeader, size_t exeHeaderSize, unsigned char* uninstIconData);
#endif//NSIS_CONFIG_UNINSTALL_SUPPORT
// returns the number of WCHARs in str including null charcter