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https://github.com/JKornev/hidden
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500 lines
15 KiB
C
500 lines
15 KiB
C
#include "ExcludeList.h"
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#include "Helper.h"
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//#include <Ntifs.h>
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#define EXCLUDE_ALLOC_TAG 'LcxE'
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typedef struct _EXCULE_FILE_PATH {
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UNICODE_STRING fullPath;
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UNICODE_STRING dirName;
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UNICODE_STRING fileName;
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} EXCULE_FILE_PATH, *PEXCULE_FILE_PATH;
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typedef struct _EXCLUDE_FILE_LIST_ENTRY {
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LIST_ENTRY list;
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ULONGLONG guid;
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ULONGLONG parentGuid;
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EXCULE_FILE_PATH path;
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} EXCLUDE_FILE_LIST_ENTRY, *PEXCLUDE_FILE_LIST_ENTRY;
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typedef struct _EXCLUDE_FILE_CONTEXT {
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LIST_ENTRY listHead;
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FAST_MUTEX listLock;
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ULONGLONG guidCounter;
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UINT32 childCounter;
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UINT32 type;
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} EXCLUDE_FILE_CONTEXT, *PEXCLUDE_FILE_CONTEXT;
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NTSTATUS AddExcludeListEntry(ExcludeContext Context, PUNICODE_STRING FilePath, UINT32 Type, PExcludeEntryId EntryId, ExcludeEntryId ParentId);
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BOOLEAN FillDirectoryFromPath(PEXCULE_FILE_PATH path, PUNICODE_STRING filePath);
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unsigned int GetCrc32(void* buf, unsigned int size, unsigned int ivect);
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NTSTATUS RtlDowncaseUnicodeString(
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PUNICODE_STRING DestinationString,
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_In_ PCUNICODE_STRING SourceString,
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_In_ BOOLEAN AllocateDestinationString
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);
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// ==========================================================================================
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NTSTATUS InitializeExcludeListContext(PExcludeContext Context, UINT32 Type)
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{
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PEXCLUDE_FILE_CONTEXT cntx;
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if (Type >= ExcludeMaxType)
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{
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LogWarning("Error, invalid exclude list type: %d", Type);
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return STATUS_INVALID_MEMBER;
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}
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cntx = (PEXCLUDE_FILE_CONTEXT)ExAllocatePoolWithTag(NonPagedPool, sizeof(EXCLUDE_FILE_CONTEXT), EXCLUDE_ALLOC_TAG);
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if (!cntx)
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{
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LogWarning("Error, can't allocate memory for context: %p", Context);
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return STATUS_ACCESS_DENIED;
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}
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InitializeListHead(&cntx->listHead);
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ExInitializeFastMutex(&cntx->listLock);
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cntx->guidCounter = 1;
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cntx->childCounter = 0;
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cntx->type = Type;
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*Context = cntx;
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return STATUS_SUCCESS;
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}
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VOID DestroyExcludeListContext(ExcludeContext Context)
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{
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PEXCLUDE_FILE_CONTEXT cntx = (PEXCLUDE_FILE_CONTEXT)Context;
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RemoveAllExcludeListEntries(Context);
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ExFreePoolWithTag(cntx, EXCLUDE_ALLOC_TAG);
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}
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NTSTATUS AddExcludeListFile(ExcludeContext Context, PUNICODE_STRING FilePath, PExcludeEntryId EntryId, ExcludeEntryId ParentId)
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{
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return AddExcludeListEntry(Context, FilePath, ExcludeFile, EntryId, ParentId);
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}
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NTSTATUS AddExcludeListDirectory(ExcludeContext Context, PUNICODE_STRING DirPath, PExcludeEntryId EntryId, ExcludeEntryId ParentId)
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{
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return AddExcludeListEntry(Context, DirPath, ExcludeDirectory, EntryId, ParentId);
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}
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NTSTATUS AddExcludeListRegistryKey(ExcludeContext Context, PUNICODE_STRING KeyPath, PExcludeEntryId EntryId, ExcludeEntryId ParentId)
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{
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return AddExcludeListEntry(Context, KeyPath, ExcludeRegKey, EntryId, ParentId);
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}
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NTSTATUS AddExcludeListRegistryValue(ExcludeContext Context, PUNICODE_STRING ValuePath, PExcludeEntryId EntryId, ExcludeEntryId ParentId)
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{
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return AddExcludeListEntry(Context, ValuePath, ExcludeRegValue, EntryId, ParentId);
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}
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NTSTATUS AddExcludeListEntry(ExcludeContext Context, PUNICODE_STRING FilePath, UINT32 Type, PExcludeEntryId EntryId, ExcludeEntryId ParentId)
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{
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enum { MAX_PATH_SIZE = 1024 };
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PEXCLUDE_FILE_CONTEXT cntx = (PEXCLUDE_FILE_CONTEXT)Context;
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PEXCLUDE_FILE_LIST_ENTRY entry, head;
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UNICODE_STRING temp;
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SIZE_T size;
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if (cntx->type != Type)
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{
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LogWarning("Warning, type isn't equal: %d != %d", cntx->type, Type);
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return STATUS_INVALID_MEMBER;
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}
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if (FilePath->Length == 0 || FilePath->Length >= MAX_PATH_SIZE)
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{
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LogWarning("Warning, invalid string size : %d", (UINT32)FilePath->Length);
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return STATUS_ACCESS_DENIED;
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}
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// Allocate and fill new list entry
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size = sizeof(EXCLUDE_FILE_LIST_ENTRY) + FilePath->Length + sizeof(WCHAR);
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entry = ExAllocatePoolWithTag(NonPagedPool, size, EXCLUDE_ALLOC_TAG);
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if (entry == NULL)
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{
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LogWarning("Warning, exclude file list is not NULL : %p", cntx);
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return STATUS_ACCESS_DENIED;
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}
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RtlZeroMemory(entry, size);
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temp.Buffer = (PWCH)((PCHAR)entry + sizeof(EXCLUDE_FILE_LIST_ENTRY));
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temp.Length = 0;
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temp.MaximumLength = FilePath->Length;
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RtlCopyUnicodeString(&temp, FilePath);
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if (!FillDirectoryFromPath(&entry->path, &temp))
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{
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ExFreePoolWithTag(entry, EXCLUDE_ALLOC_TAG);
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LogWarning("Warning, exclude file list is not NULL : %p", cntx);
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return STATUS_ACCESS_DENIED;
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}
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// Push new list entry to context
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if (Type == ExcludeRegKey || Type == ExcludeRegValue)
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{
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// We should add new entry in alphabet order
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head = (PEXCLUDE_FILE_LIST_ENTRY)cntx->listHead.Flink;
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while (head != (PEXCLUDE_FILE_LIST_ENTRY)&cntx->listHead)
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{
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INT res = RtlCompareUnicodeString(&entry->path.fullPath, &head->path.fullPath, TRUE);
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if (res <= 0)
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break;
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head = (PEXCLUDE_FILE_LIST_ENTRY)head->list.Flink;
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}
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}
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else
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{
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head = (PEXCLUDE_FILE_LIST_ENTRY)&cntx->listHead;
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}
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// Parent GUID is used when we want to link few entries in a group with one master,
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// in this case parent GUID should be any valid entry GUID. When we remove parent entry
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// all it's children will be removed too
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entry->parentGuid = ParentId;
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ExAcquireFastMutex(&cntx->listLock);
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if (entry->parentGuid)
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cntx->childCounter++;
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entry->guid = cntx->guidCounter++;
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InsertTailList((PLIST_ENTRY)head, (PLIST_ENTRY)entry);
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ExReleaseFastMutex(&cntx->listLock);
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*EntryId = entry->guid;
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return STATUS_SUCCESS;
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}
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NTSTATUS RemoveExcludeListEntry(ExcludeContext Context, ExcludeEntryId EntryId)
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{
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NTSTATUS status = STATUS_NOT_FOUND;
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PEXCLUDE_FILE_CONTEXT cntx = (PEXCLUDE_FILE_CONTEXT)Context;
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PEXCLUDE_FILE_LIST_ENTRY entry;
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ExAcquireFastMutex(&cntx->listLock);
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entry = (PEXCLUDE_FILE_LIST_ENTRY)cntx->listHead.Flink;
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while (entry != (PEXCLUDE_FILE_LIST_ENTRY)&cntx->listHead)
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{
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if (EntryId == entry->guid)
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{
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RemoveEntryList((PLIST_ENTRY)entry);
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ExFreePoolWithTag(entry, EXCLUDE_ALLOC_TAG);
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status = STATUS_SUCCESS;
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break;
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}
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entry = (PEXCLUDE_FILE_LIST_ENTRY)entry->list.Flink;
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}
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if (cntx->childCounter)
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{
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entry = (PEXCLUDE_FILE_LIST_ENTRY)cntx->listHead.Flink;
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while (entry != (PEXCLUDE_FILE_LIST_ENTRY)&cntx->listHead)
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{
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PEXCLUDE_FILE_LIST_ENTRY remove = entry;
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entry = (PEXCLUDE_FILE_LIST_ENTRY)entry->list.Flink;
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if (EntryId == remove->parentGuid)
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{
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ASSERT(cntx->childCounter > 0);
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cntx->childCounter--;
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RemoveEntryList((PLIST_ENTRY)remove);
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ExFreePoolWithTag(remove, EXCLUDE_ALLOC_TAG);
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}
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}
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}
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ExReleaseFastMutex(&cntx->listLock);
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return status;
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}
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NTSTATUS RemoveAllExcludeListEntries(ExcludeContext Context)
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{
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PEXCLUDE_FILE_CONTEXT cntx = (PEXCLUDE_FILE_CONTEXT)Context;
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PEXCLUDE_FILE_LIST_ENTRY entry;
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ExAcquireFastMutex(&cntx->listLock);
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entry = (PEXCLUDE_FILE_LIST_ENTRY)cntx->listHead.Flink;
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while (entry != (PEXCLUDE_FILE_LIST_ENTRY)&cntx->listHead)
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{
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PEXCLUDE_FILE_LIST_ENTRY remove = entry;
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entry = (PEXCLUDE_FILE_LIST_ENTRY)entry->list.Flink;
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if (remove->parentGuid)
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{
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ASSERT(cntx->childCounter > 0);
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cntx->childCounter--;
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}
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RemoveEntryList((PLIST_ENTRY)remove);
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ExFreePoolWithTag(remove, EXCLUDE_ALLOC_TAG);
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}
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ASSERT(cntx->childCounter == 0);
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ExReleaseFastMutex(&cntx->listLock);
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return STATUS_SUCCESS;
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}
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BOOLEAN CheckExcludeListFile(ExcludeContext Context, PCUNICODE_STRING Path)
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{
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PEXCLUDE_FILE_CONTEXT cntx = (PEXCLUDE_FILE_CONTEXT)Context;
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PEXCLUDE_FILE_LIST_ENTRY entry;
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BOOLEAN result = FALSE;
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ExAcquireFastMutex(&cntx->listLock);
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entry = (PEXCLUDE_FILE_LIST_ENTRY)cntx->listHead.Flink;
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while (entry != (PEXCLUDE_FILE_LIST_ENTRY)&cntx->listHead)
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{
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if (RtlCompareUnicodeString(&entry->path.fullPath, Path, TRUE) == 0)
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{
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result = TRUE;
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break;
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}
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entry = (PEXCLUDE_FILE_LIST_ENTRY)entry->list.Flink;
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}
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ExReleaseFastMutex(&cntx->listLock);
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return result;
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}
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BOOLEAN CheckExcludeListDirectory(ExcludeContext Context, PCUNICODE_STRING Path)
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{
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PEXCLUDE_FILE_CONTEXT cntx = (PEXCLUDE_FILE_CONTEXT)Context;
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PEXCLUDE_FILE_LIST_ENTRY entry;
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UNICODE_STRING Directory, dir;
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BOOLEAN result = FALSE;
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Directory = *Path;
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if (Directory.Length > 0 && Directory.Buffer[Directory.Length / sizeof(WCHAR) - 1] == L'\\')
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Directory.Length -= sizeof(WCHAR);
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ExAcquireFastMutex(&cntx->listLock);
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entry = (PEXCLUDE_FILE_LIST_ENTRY)cntx->listHead.Flink;
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while (entry != (PEXCLUDE_FILE_LIST_ENTRY)&cntx->listHead)
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{
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dir = Directory;
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if (dir.Length >= entry->path.fullPath.Length)
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{
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BOOLEAN compare = TRUE;
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if (dir.Length > entry->path.fullPath.Length)
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{
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if (dir.Buffer[entry->path.fullPath.Length / sizeof(WCHAR)] != L'\\')
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compare = FALSE;
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else
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dir.Length = entry->path.fullPath.Length;
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}
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if (compare && RtlCompareUnicodeString(&entry->path.fullPath, &dir, TRUE) == 0)
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{
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result = TRUE;
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break;
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}
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}
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entry = (PEXCLUDE_FILE_LIST_ENTRY)entry->list.Flink;
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}
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ExReleaseFastMutex(&cntx->listLock);
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return result;
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}
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BOOLEAN CheckExcludeListDirFile(ExcludeContext Context, PCUNICODE_STRING Dir, PCUNICODE_STRING File)
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{
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PEXCLUDE_FILE_CONTEXT cntx = (PEXCLUDE_FILE_CONTEXT)Context;
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PEXCLUDE_FILE_LIST_ENTRY entry;
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UNICODE_STRING Directory;
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BOOLEAN result = FALSE;
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Directory = *Dir;
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if (Directory.Length > 0 && Directory.Buffer[Directory.Length / sizeof(WCHAR) - 1] == L'\\')
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Directory.Length -= sizeof(WCHAR);
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ExAcquireFastMutex(&cntx->listLock);
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entry = (PEXCLUDE_FILE_LIST_ENTRY)cntx->listHead.Flink;
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while (entry != (PEXCLUDE_FILE_LIST_ENTRY)&cntx->listHead)
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{
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if (RtlCompareUnicodeString(&entry->path.dirName, &Directory, TRUE) == 0
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&& RtlCompareUnicodeString(&entry->path.fileName, File, TRUE) == 0)
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{
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result = TRUE;
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break;
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}
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entry = (PEXCLUDE_FILE_LIST_ENTRY)entry->list.Flink;
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}
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ExReleaseFastMutex(&cntx->listLock);
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return result;
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}
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BOOLEAN CheckExcludeListRegKey(ExcludeContext Context, PUNICODE_STRING Key)
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{
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return CheckExcludeListDirectory(Context, Key);
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}
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BOOLEAN CheckExcludeListRegKeyValueName(ExcludeContext Context, PUNICODE_STRING Key, PUNICODE_STRING Name, PUINT32 Increament)
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{
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PEXCLUDE_FILE_CONTEXT cntx = (PEXCLUDE_FILE_CONTEXT)Context;
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PEXCLUDE_FILE_LIST_ENTRY entry;
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UNICODE_STRING Directory;
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BOOLEAN result = FALSE;
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Directory = *Key;
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*Increament = 0;
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if (Directory.Length > 0 && Directory.Buffer[Directory.Length / sizeof(WCHAR)-1] == L'\\')
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Directory.Length -= sizeof(WCHAR);
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ExAcquireFastMutex(&cntx->listLock);
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entry = (PEXCLUDE_FILE_LIST_ENTRY)cntx->listHead.Flink;
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while (entry != (PEXCLUDE_FILE_LIST_ENTRY)&cntx->listHead)
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{
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if (RtlCompareUnicodeString(&entry->path.dirName, &Directory, TRUE) == 0)
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{
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INT res;
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res = RtlCompareUnicodeString(&entry->path.fileName, Name, TRUE);
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if (res == 0)
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{
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(*Increament)++;
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result = TRUE;
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break;
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}
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else if (res < 0)
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{
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(*Increament)++;
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}
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else if (res > 0)
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{
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break;
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}
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}
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entry = (PEXCLUDE_FILE_LIST_ENTRY)entry->list.Flink;
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}
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ExReleaseFastMutex(&cntx->listLock);
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return result;
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}
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// ==========================================================================================
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BOOLEAN FillDirectoryFromPath(PEXCULE_FILE_PATH path, PUNICODE_STRING filePath)
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{
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USHORT i, count;
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LPWSTR buffer = filePath->Buffer;
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count = filePath->Length / sizeof(WCHAR);
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if (count < 1)
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return FALSE;
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i = count;
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do
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{
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i--;
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if (buffer[i] == L'\\')
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{
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if (i + 1 >= count)
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return FALSE;
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path->fileName.Buffer = buffer + i + 1;
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path->fileName.Length = (count - i - 1) * sizeof(WCHAR);
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path->fileName.MaximumLength = path->fileName.Length;
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path->fullPath = *filePath;
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path->dirName.Buffer = filePath->Buffer;
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path->dirName.Length = i * sizeof(WCHAR);
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path->dirName.MaximumLength = path->dirName.Length;
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return TRUE;
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}
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}
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while (i > 0);
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return FALSE;
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}
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// code from wikipedia.org
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static const unsigned int g_crc32Table [256] = {
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0x00000000, 0x77073096, 0xEE0E612C, 0x990951BA, 0x076DC419, 0x706AF48F, 0xE963A535,
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0x9E6495A3, 0x0EDB8832, 0x79DCB8A4, 0xE0D5E91E, 0x97D2D988, 0x09B64C2B, 0x7EB17CBD,
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0xE7B82D07, 0x90BF1D91, 0x1DB71064, 0x6AB020F2, 0xF3B97148, 0x84BE41DE, 0x1ADAD47D,
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0x6DDDE4EB, 0xF4D4B551, 0x83D385C7, 0x136C9856, 0x646BA8C0, 0xFD62F97A, 0x8A65C9EC,
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0x14015C4F, 0x63066CD9, 0xFA0F3D63, 0x8D080DF5, 0x3B6E20C8, 0x4C69105E, 0xD56041E4,
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0xA2677172, 0x3C03E4D1, 0x4B04D447, 0xD20D85FD, 0xA50AB56B, 0x35B5A8FA, 0x42B2986C,
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0xDBBBC9D6, 0xACBCF940, 0x32D86CE3, 0x45DF5C75, 0xDCD60DCF, 0xABD13D59, 0x26D930AC,
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0x51DE003A, 0xC8D75180, 0xBFD06116, 0x21B4F4B5, 0x56B3C423, 0xCFBA9599, 0xB8BDA50F,
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0x2802B89E, 0x5F058808, 0xC60CD9B2, 0xB10BE924, 0x2F6F7C87, 0x58684C11, 0xC1611DAB,
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0xB6662D3D, 0x76DC4190, 0x01DB7106, 0x98D220BC, 0xEFD5102A, 0x71B18589, 0x06B6B51F,
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0x9FBFE4A5, 0xE8B8D433, 0x7807C9A2, 0x0F00F934, 0x9609A88E, 0xE10E9818, 0x7F6A0DBB,
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0x086D3D2D, 0x91646C97, 0xE6635C01, 0x6B6B51F4, 0x1C6C6162, 0x856530D8, 0xF262004E,
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0x6C0695ED, 0x1B01A57B, 0x8208F4C1, 0xF50FC457, 0x65B0D9C6, 0x12B7E950, 0x8BBEB8EA,
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0xFCB9887C, 0x62DD1DDF, 0x15DA2D49, 0x8CD37CF3, 0xFBD44C65, 0x4DB26158, 0x3AB551CE,
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0xA3BC0074, 0xD4BB30E2, 0x4ADFA541, 0x3DD895D7, 0xA4D1C46D, 0xD3D6F4FB, 0x4369E96A,
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0x346ED9FC, 0xAD678846, 0xDA60B8D0, 0x44042D73, 0x33031DE5, 0xAA0A4C5F, 0xDD0D7CC9,
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0x5005713C, 0x270241AA, 0xBE0B1010, 0xC90C2086, 0x5768B525, 0x206F85B3, 0xB966D409,
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0xCE61E49F, 0x5EDEF90E, 0x29D9C998, 0xB0D09822, 0xC7D7A8B4, 0x59B33D17, 0x2EB40D81,
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0xB7BD5C3B, 0xC0BA6CAD, 0xEDB88320, 0x9ABFB3B6, 0x03B6E20C, 0x74B1D29A, 0xEAD54739,
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0x9DD277AF, 0x04DB2615, 0x73DC1683, 0xE3630B12, 0x94643B84, 0x0D6D6A3E, 0x7A6A5AA8,
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0xE40ECF0B, 0x9309FF9D, 0x0A00AE27, 0x7D079EB1, 0xF00F9344, 0x8708A3D2, 0x1E01F268,
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|
0x6906C2FE, 0xF762575D, 0x806567CB, 0x196C3671, 0x6E6B06E7, 0xFED41B76, 0x89D32BE0,
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0x10DA7A5A, 0x67DD4ACC, 0xF9B9DF6F, 0x8EBEEFF9, 0x17B7BE43, 0x60B08ED5, 0xD6D6A3E8,
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0xA1D1937E, 0x38D8C2C4, 0x4FDFF252, 0xD1BB67F1, 0xA6BC5767, 0x3FB506DD, 0x48B2364B,
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|
0xD80D2BDA, 0xAF0A1B4C, 0x36034AF6, 0x41047A60, 0xDF60EFC3, 0xA867DF55, 0x316E8EEF,
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0x4669BE79, 0xCB61B38C, 0xBC66831A, 0x256FD2A0, 0x5268E236, 0xCC0C7795, 0xBB0B4703,
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|
0x220216B9, 0x5505262F, 0xC5BA3BBE, 0xB2BD0B28, 0x2BB45A92, 0x5CB36A04, 0xC2D7FFA7,
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0xB5D0CF31, 0x2CD99E8B, 0x5BDEAE1D, 0x9B64C2B0, 0xEC63F226, 0x756AA39C, 0x026D930A,
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0x9C0906A9, 0xEB0E363F, 0x72076785, 0x05005713, 0x95BF4A82, 0xE2B87A14, 0x7BB12BAE,
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0x0CB61B38, 0x92D28E9B, 0xE5D5BE0D, 0x7CDCEFB7, 0x0BDBDF21, 0x86D3D2D4, 0xF1D4E242,
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|
0x68DDB3F8, 0x1FDA836E, 0x81BE16CD, 0xF6B9265B, 0x6FB077E1, 0x18B74777, 0x88085AE6,
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0xFF0F6A70, 0x66063BCA, 0x11010B5C, 0x8F659EFF, 0xF862AE69, 0x616BFFD3, 0x166CCF45,
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|
0xA00AE278, 0xD70DD2EE, 0x4E048354, 0x3903B3C2, 0xA7672661, 0xD06016F7, 0x4969474D,
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|
0x3E6E77DB, 0xAED16A4A, 0xD9D65ADC, 0x40DF0B66, 0x37D83BF0, 0xA9BCAE53, 0xDEBB9EC5,
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|
0x47B2CF7F, 0x30B5FFE9, 0xBDBDF21C, 0xCABAC28A, 0x53B39330, 0x24B4A3A6, 0xBAD03605,
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|
0xCDD70693, 0x54DE5729, 0x23D967BF, 0xB3667A2E, 0xC4614AB8, 0x5D681B02, 0x2A6F2B94,
|
|
0xB40BBE37, 0xC30C8EA1, 0x5A05DF1B, 0x2D02EF8D
|
|
};
|
|
|
|
unsigned int GetCrc32(void* buf, unsigned int size, unsigned int ivect)
|
|
{
|
|
unsigned char *src = (unsigned char*)buf;
|
|
unsigned int crc = ~ivect;
|
|
|
|
while (size--)
|
|
crc = (crc >> 8) ^ g_crc32Table[(crc ^ *src++) & 0xFF];
|
|
|
|
return 0xFFFFFFFF ^ crc;
|
|
}
|