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| author | Mounir IDRASSI <mounir.idrassi@idrix.fr> | 2024-08-21 09:24:57 +0200 |
|---|---|---|
| committer | Mounir IDRASSI <mounir.idrassi@idrix.fr> | 2024-08-21 09:24:57 +0200 |
| commit | 695d1735a097910403d28640f9af8b6b363c3493 (patch) | |
| tree | 54872139b8515bbe1e9ef13220c1fbdb9bb49cdc /src/Common | |
| parent | 0f94015041927cc373e4e83f25042c559344f4b8 (diff) | |
| download | VeraCrypt-695d1735a097910403d28640f9af8b6b363c3493.tar.gz VeraCrypt-695d1735a097910403d28640f9af8b6b363c3493.zip | |
Windows: Only load valid XML language files (Language.xx.xml or Language.xx-yy.xml format)
Diffstat (limited to 'src/Common')
| -rw-r--r-- | src/Common/Language.c | 44 |
1 files changed, 44 insertions, 0 deletions
diff --git a/src/Common/Language.c b/src/Common/Language.c index 278b7dd1..a6bc9891 100644 --- a/src/Common/Language.c +++ b/src/Common/Language.c @@ -83,6 +83,31 @@ static char *MapFirstLanguageFile () return LanguageFileBuffer; } +static int IsValidLanguageFileName(const wchar_t* filename) { + size_t len = wcslen(filename); + + // Check the base format and length directly + if (_wcsnicmp(filename, L"Language.", 9) != 0 || (len != 15 && len != 18)) + return 0; // Does not start with "Language." or has incorrect length + + // Check for the ".xml" suffix + if (_wcsicmp(filename + len - 4, L".xml") != 0) + return 0; // Does not end with ".xml" + + // Detailed checks based on the specific length + if (len == 15) { + // Format should be Language.xx.xml + if (iswalpha(filename[9]) && iswalpha(filename[10])) + return 1; // Valid format for short code + } else if (len == 18) { + // Format should be Language.xx-yy.xml + if (iswalpha(filename[9]) && iswalpha(filename[10]) && filename[11] == L'-' && + iswalpha(filename[12]) && iswalpha(filename[13])) + return 1; // Valid format for long code + } + + return 0; // If none of the conditions are met, the filename is invalid +} static char *MapNextLanguageFile (int resourceid) { @@ -91,6 +116,7 @@ static char *MapNextLanguageFile (int resourceid) HANDLE file; DWORD read; BOOL bStatus; + BOOL validFileFound = FALSE; /* free memory here to avoid leaks */ if (LanguageFileBuffer != NULL) @@ -122,6 +148,24 @@ static char *MapNextLanguageFile (int resourceid) if (LanguageFileFindHandle == INVALID_HANDLE_VALUE) return NULL; if (find.nFileSizeHigh != 0) return NULL; + // Validate the file name format + while (!validFileFound) + { + if (!IsValidLanguageFileName(find.cFileName)) + { + if (!FindNextFileW(LanguageFileFindHandle, &find)) + { + FindClose(LanguageFileFindHandle); + LanguageFileFindHandle = INVALID_HANDLE_VALUE; + return NULL; + } + } + else + { + validFileFound = TRUE; + } + } + LanguageFileBuffer = malloc(find.nFileSizeLow + 1); if (LanguageFileBuffer == NULL) return NULL; |