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[RTL]

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- Validate parameters passed into path functions

svn path=/trunk/; revision=52744
This commit is contained in:
Cameron Gutman 2011-07-20 17:59:16 +00:00
parent ad1f4ccd47
commit c4097c4a0c
1 changed files with 28 additions and 5 deletions
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33
reactos/lib/rtl/path.c
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@ -51,6 +51,9 @@ RtlIsDosDeviceName_Ustr(IN PUNICODE_STRING PathString)
USHORT ReturnOffset = 0, ReturnLength;
WCHAR c;
/* Validate the input */
if (!PathString) return 0;
/* Check what type of path this is */
switch (RtlDetermineDosPathNameType_Ustr(PathString))
{
@ -198,8 +201,14 @@ RTL_PATH_TYPE
NTAPI
RtlDetermineDosPathNameType_Ustr(IN PCUNICODE_STRING PathString)
{
PWCHAR Path = PathString->Buffer;
ULONG Chars = PathString->Length / sizeof(WCHAR);
PWCHAR Path;
ULONG Chars;
/* Validate the input */
if (!PathString) return RtlPathTypeUnknown;
Path = PathString->Buffer;
Chars = PathString->Length / sizeof(WCHAR);
/*
* The algorithm is similar to RtlDetermineDosPathNameType_U but here we
@ -282,7 +291,7 @@ RtlGetFullPathName_Ustr(IN PUNICODE_STRING FileName,
/* Handle initial path type and failure case */
*PathType = RtlPathTypeUnknown;
if (!(Size) || (FileName->Buffer[0] == UNICODE_NULL)) return 0;
if (!(Size) || !(Buffer) || !(FileName) || (FileName->Buffer[0] == UNICODE_NULL)) return 0;
/* Break filename into component parts */
FileNameBuffer = FileName->Buffer;
@ -358,13 +367,16 @@ RtlGetFullPathName_Ustr(IN PUNICODE_STRING FileName,
NTSTATUS
NTAPI
RtlpWin32NTNameToNtPathName_U(IN PUNICODE_STRING DosPath,
IN PUNICODE_STRING NtPath,
OUT PUNICODE_STRING NtPath,
OUT PCWSTR *PartName,
OUT PRTL_RELATIVE_NAME_U RelativeName)
{
ULONG DosLength;
PWSTR NewBuffer, p;
/* Validate the input */
if (!DosPath) return STATUS_OBJECT_NAME_INVALID;
/* Validate the DOS length */
DosLength = DosPath->Length;
if (DosLength >= UNICODE_STRING_MAX_BYTES) return STATUS_NAME_TOO_LONG;
@ -445,6 +457,9 @@ RtlpDosPathNameToRelativeNtPathName_Ustr(IN BOOLEAN HaveRelative,
HaveRelative, DosName, NtName, PartName, RelativeName);
MaxLength = sizeof(BigBuffer);
/* Validate the input */
if (!DosName) return STATUS_OBJECT_NAME_INVALID;
/* Capture input string */
CapturedDosName = *DosName;
@ -670,6 +685,9 @@ RtlDoesFileExists_UstrEx(IN PCUNICODE_STRING FileName,
NTSTATUS Status;
FILE_BASIC_INFORMATION BasicInformation;
/* Validate the input */
if (!FileName) return FALSE;
/* Get the NT Path */
Result = RtlDosPathNameToRelativeNtPathName_Ustr(FileName,
&NtPathName,
@ -798,7 +816,9 @@ NTAPI
RtlDetermineDosPathNameType_U(IN PCWSTR Path)
{
DPRINT("RtlDetermineDosPathNameType_U %S\n", Path);
ASSERT(Path != NULL);
/* Validate the input */
if (!Path) return RtlPathTypeUnknown;
/* Unlike the newer RtlDetermineDosPathNameType_U we assume 4 characters */
if (IS_PATH_SEPARATOR(Path[0]))
@ -1443,6 +1463,9 @@ RtlDosSearchPath_U(IN PCWSTR Path,
PWCHAR NewBuffer, BufferStart;
PCWSTR p;
/* Validate the input */
if (!(Path) || !(FileName)) return 0;
/* Check if this is an absolute path */
if (RtlDetermineDosPathNameType_U(FileName) != RtlPathTypeRelative)
{