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645 lines
18 KiB
C
645 lines
18 KiB
C
/*
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* PROJECT: Registry manipulation library
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* LICENSE: GPL - See COPYING in the top level directory
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* COPYRIGHT: Copyright 2005 Filip Navara <navaraf@reactos.org>
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* Copyright 2001 - 2005 Eric Kohl
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*/
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#include "cmlib.h"
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#define NDEBUG
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#include <debug.h>
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/**
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* @name HvpVerifyHiveHeader
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*
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* Internal function to verify that a hive header has valid format.
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*/
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BOOLEAN CMAPI
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HvpVerifyHiveHeader(
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IN PHBASE_BLOCK BaseBlock)
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{
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if (BaseBlock->Signature != HV_SIGNATURE ||
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BaseBlock->Major != HSYS_MAJOR ||
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BaseBlock->Minor < HSYS_MINOR ||
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BaseBlock->Type != HFILE_TYPE_PRIMARY ||
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BaseBlock->Format != HBASE_FORMAT_MEMORY ||
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BaseBlock->Cluster != 1 ||
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BaseBlock->Sequence1 != BaseBlock->Sequence2 ||
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HvpHiveHeaderChecksum(BaseBlock) != BaseBlock->CheckSum)
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{
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DPRINT1("Verify Hive Header failed:\n");
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DPRINT1(" Signature: 0x%x, expected 0x%x; Major: 0x%x, expected 0x%x\n",
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BaseBlock->Signature, HV_SIGNATURE, BaseBlock->Major, HSYS_MAJOR);
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DPRINT1(" Minor: 0x%x expected to be >= 0x%x; Type: 0x%x, expected 0x%x\n",
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BaseBlock->Minor, HSYS_MINOR, BaseBlock->Type, HFILE_TYPE_PRIMARY);
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DPRINT1(" Format: 0x%x, expected 0x%x; Cluster: 0x%x, expected 1\n",
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BaseBlock->Format, HBASE_FORMAT_MEMORY, BaseBlock->Cluster);
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DPRINT1(" Sequence: 0x%x, expected 0x%x; Checksum: 0x%x, expected 0x%x\n",
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BaseBlock->Sequence1, BaseBlock->Sequence2,
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HvpHiveHeaderChecksum(BaseBlock), BaseBlock->CheckSum);
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return FALSE;
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}
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return TRUE;
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}
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/**
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* @name HvpFreeHiveBins
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*
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* Internal function to free all bin storage associated with a hive descriptor.
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*/
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VOID CMAPI
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HvpFreeHiveBins(
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PHHIVE Hive)
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{
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ULONG i;
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PHBIN Bin;
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ULONG Storage;
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for (Storage = 0; Storage < Hive->StorageTypeCount; Storage++)
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{
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Bin = NULL;
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for (i = 0; i < Hive->Storage[Storage].Length; i++)
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{
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if (Hive->Storage[Storage].BlockList[i].BinAddress == (ULONG_PTR)NULL)
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continue;
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if (Hive->Storage[Storage].BlockList[i].BinAddress != (ULONG_PTR)Bin)
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{
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Bin = (PHBIN)Hive->Storage[Storage].BlockList[i].BinAddress;
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Hive->Free((PHBIN)Hive->Storage[Storage].BlockList[i].BinAddress, 0);
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}
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Hive->Storage[Storage].BlockList[i].BinAddress = (ULONG_PTR)NULL;
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Hive->Storage[Storage].BlockList[i].BlockAddress = (ULONG_PTR)NULL;
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}
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if (Hive->Storage[Storage].Length)
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Hive->Free(Hive->Storage[Storage].BlockList, 0);
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}
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}
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/**
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* @name HvpAllocBaseBlockAligned
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*
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* Internal helper function to allocate cluster-aligned hive base blocks.
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*/
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static __inline PHBASE_BLOCK
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HvpAllocBaseBlockAligned(
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IN PHHIVE Hive,
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IN BOOLEAN Paged,
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IN ULONG Tag)
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{
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PHBASE_BLOCK BaseBlock;
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ULONG Alignment;
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ASSERT(sizeof(HBASE_BLOCK) >= (HSECTOR_SIZE * Hive->Cluster));
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/* Allocate the buffer */
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BaseBlock = Hive->Allocate(Hive->BaseBlockAlloc, Paged, Tag);
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if (!BaseBlock) return NULL;
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/* Check for, and enforce, alignment */
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Alignment = Hive->Cluster * HSECTOR_SIZE -1;
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if ((ULONG_PTR)BaseBlock & Alignment)
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{
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/* Free the old header and reallocate a new one, always paged */
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Hive->Free(BaseBlock, Hive->BaseBlockAlloc);
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BaseBlock = Hive->Allocate(PAGE_SIZE, TRUE, Tag);
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if (!BaseBlock) return NULL;
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Hive->BaseBlockAlloc = PAGE_SIZE;
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}
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return BaseBlock;
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}
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/**
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* @name HvpInitFileName
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*
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* Internal function to initialize the UNICODE NULL-terminated hive file name
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* member of a hive header by copying the last 31 characters of the file name.
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* Mainly used for debugging purposes.
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*/
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static VOID
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HvpInitFileName(
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IN OUT PHBASE_BLOCK BaseBlock,
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IN PCUNICODE_STRING FileName OPTIONAL)
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{
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ULONG_PTR Offset;
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SIZE_T Length;
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/* Always NULL-initialize */
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RtlZeroMemory(BaseBlock->FileName, (HIVE_FILENAME_MAXLEN + 1) * sizeof(WCHAR));
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/* Copy the 31 last characters of the hive file name if any */
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if (!FileName) return;
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if (FileName->Length / sizeof(WCHAR) <= HIVE_FILENAME_MAXLEN)
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{
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Offset = 0;
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Length = FileName->Length;
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}
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else
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{
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Offset = FileName->Length / sizeof(WCHAR) - HIVE_FILENAME_MAXLEN;
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Length = HIVE_FILENAME_MAXLEN * sizeof(WCHAR);
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}
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RtlCopyMemory(BaseBlock->FileName, FileName->Buffer + Offset, Length);
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}
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/**
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* @name HvpCreateHive
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*
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* Internal helper function to initialize a hive descriptor structure
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* for a newly created hive in memory.
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*
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* @see HvInitialize
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*/
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NTSTATUS CMAPI
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HvpCreateHive(
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IN OUT PHHIVE RegistryHive,
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IN PCUNICODE_STRING FileName OPTIONAL)
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{
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PHBASE_BLOCK BaseBlock;
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ULONG Index;
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/* Allocate the base block */
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BaseBlock = HvpAllocBaseBlockAligned(RegistryHive, FALSE, TAG_CM);
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if (BaseBlock == NULL)
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return STATUS_NO_MEMORY;
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/* Clear it */
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RtlZeroMemory(BaseBlock, RegistryHive->BaseBlockAlloc);
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BaseBlock->Signature = HV_SIGNATURE;
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BaseBlock->Major = HSYS_MAJOR;
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BaseBlock->Minor = HSYS_MINOR;
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BaseBlock->Type = HFILE_TYPE_PRIMARY;
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BaseBlock->Format = HBASE_FORMAT_MEMORY;
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BaseBlock->Cluster = 1;
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BaseBlock->RootCell = HCELL_NIL;
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BaseBlock->Length = 0;
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BaseBlock->Sequence1 = 1;
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BaseBlock->Sequence2 = 1;
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BaseBlock->TimeStamp.QuadPart = 0ULL;
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/*
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* No need to compute the checksum since
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* the hive resides only in memory so far.
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*/
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BaseBlock->CheckSum = 0;
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/* Set default boot type */
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BaseBlock->BootType = 0;
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/* Setup hive data */
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RegistryHive->BaseBlock = BaseBlock;
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RegistryHive->Version = BaseBlock->Minor; // == HSYS_MINOR
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for (Index = 0; Index < 24; Index++)
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{
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RegistryHive->Storage[Stable].FreeDisplay[Index] = HCELL_NIL;
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RegistryHive->Storage[Volatile].FreeDisplay[Index] = HCELL_NIL;
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}
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HvpInitFileName(BaseBlock, FileName);
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return STATUS_SUCCESS;
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}
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/**
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* @name HvpInitializeMemoryHive
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*
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* Internal helper function to initialize hive descriptor structure for
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* an existing hive stored in memory. The data of the hive is copied
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* and it is prepared for read/write access.
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*
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* @see HvInitialize
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*/
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NTSTATUS CMAPI
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HvpInitializeMemoryHive(
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PHHIVE Hive,
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PHBASE_BLOCK ChunkBase,
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IN PCUNICODE_STRING FileName OPTIONAL)
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{
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SIZE_T BlockIndex;
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PHBIN Bin, NewBin;
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ULONG i;
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ULONG BitmapSize;
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PULONG BitmapBuffer;
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SIZE_T ChunkSize;
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ChunkSize = ChunkBase->Length;
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DPRINT("ChunkSize: %zx\n", ChunkSize);
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if (ChunkSize < sizeof(HBASE_BLOCK) ||
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!HvpVerifyHiveHeader(ChunkBase))
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{
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DPRINT1("Registry is corrupt: ChunkSize 0x%zx < sizeof(HBASE_BLOCK) 0x%zx, "
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"or HvpVerifyHiveHeader() failed\n", ChunkSize, sizeof(HBASE_BLOCK));
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return STATUS_REGISTRY_CORRUPT;
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}
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/* Allocate the base block */
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Hive->BaseBlock = HvpAllocBaseBlockAligned(Hive, FALSE, TAG_CM);
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if (Hive->BaseBlock == NULL)
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return STATUS_NO_MEMORY;
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RtlCopyMemory(Hive->BaseBlock, ChunkBase, sizeof(HBASE_BLOCK));
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/* Setup hive data */
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Hive->Version = ChunkBase->Minor;
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/*
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* Build a block list from the in-memory chunk and copy the data as
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* we go.
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*/
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Hive->Storage[Stable].Length = (ULONG)(ChunkSize / HBLOCK_SIZE);
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Hive->Storage[Stable].BlockList =
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Hive->Allocate(Hive->Storage[Stable].Length *
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sizeof(HMAP_ENTRY), FALSE, TAG_CM);
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if (Hive->Storage[Stable].BlockList == NULL)
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{
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DPRINT1("Allocating block list failed\n");
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Hive->Free(Hive->BaseBlock, Hive->BaseBlockAlloc);
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return STATUS_NO_MEMORY;
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}
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for (BlockIndex = 0; BlockIndex < Hive->Storage[Stable].Length; )
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{
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Bin = (PHBIN)((ULONG_PTR)ChunkBase + (BlockIndex + 1) * HBLOCK_SIZE);
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if (Bin->Signature != HV_BIN_SIGNATURE ||
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(Bin->Size % HBLOCK_SIZE) != 0)
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{
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DPRINT1("Invalid bin at BlockIndex %lu, Signature 0x%x, Size 0x%x\n",
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(unsigned long)BlockIndex, (unsigned)Bin->Signature, (unsigned)Bin->Size);
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Hive->Free(Hive->Storage[Stable].BlockList, 0);
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Hive->Free(Hive->BaseBlock, Hive->BaseBlockAlloc);
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return STATUS_REGISTRY_CORRUPT;
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}
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NewBin = Hive->Allocate(Bin->Size, TRUE, TAG_CM);
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if (NewBin == NULL)
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{
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Hive->Free(Hive->Storage[Stable].BlockList, 0);
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Hive->Free(Hive->BaseBlock, Hive->BaseBlockAlloc);
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return STATUS_NO_MEMORY;
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}
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Hive->Storage[Stable].BlockList[BlockIndex].BinAddress = (ULONG_PTR)NewBin;
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Hive->Storage[Stable].BlockList[BlockIndex].BlockAddress = (ULONG_PTR)NewBin;
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RtlCopyMemory(NewBin, Bin, Bin->Size);
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if (Bin->Size > HBLOCK_SIZE)
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{
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for (i = 1; i < Bin->Size / HBLOCK_SIZE; i++)
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{
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Hive->Storage[Stable].BlockList[BlockIndex + i].BinAddress = (ULONG_PTR)NewBin;
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Hive->Storage[Stable].BlockList[BlockIndex + i].BlockAddress =
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((ULONG_PTR)NewBin + (i * HBLOCK_SIZE));
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}
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}
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BlockIndex += Bin->Size / HBLOCK_SIZE;
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}
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if (HvpCreateHiveFreeCellList(Hive))
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{
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HvpFreeHiveBins(Hive);
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Hive->Free(Hive->BaseBlock, Hive->BaseBlockAlloc);
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return STATUS_NO_MEMORY;
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}
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BitmapSize = ROUND_UP(Hive->Storage[Stable].Length,
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sizeof(ULONG) * 8) / 8;
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BitmapBuffer = (PULONG)Hive->Allocate(BitmapSize, TRUE, TAG_CM);
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if (BitmapBuffer == NULL)
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{
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HvpFreeHiveBins(Hive);
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Hive->Free(Hive->BaseBlock, Hive->BaseBlockAlloc);
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return STATUS_NO_MEMORY;
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}
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RtlInitializeBitMap(&Hive->DirtyVector, BitmapBuffer, BitmapSize * 8);
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RtlClearAllBits(&Hive->DirtyVector);
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HvpInitFileName(Hive->BaseBlock, FileName);
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return STATUS_SUCCESS;
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}
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/**
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* @name HvpInitializeFlatHive
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*
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* Internal helper function to initialize hive descriptor structure for
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* a hive stored in memory. The in-memory data of the hive are directly
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* used and it is read-only accessible.
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*
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* @see HvInitialize
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*/
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NTSTATUS CMAPI
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HvpInitializeFlatHive(
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PHHIVE Hive,
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PHBASE_BLOCK ChunkBase)
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{
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if (!HvpVerifyHiveHeader(ChunkBase))
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return STATUS_REGISTRY_CORRUPT;
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/* Setup hive data */
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Hive->BaseBlock = ChunkBase;
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Hive->Version = ChunkBase->Minor;
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Hive->Flat = TRUE;
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Hive->ReadOnly = TRUE;
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Hive->StorageTypeCount = 1;
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/* Set default boot type */
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ChunkBase->BootType = 0;
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return STATUS_SUCCESS;
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}
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typedef enum _RESULT
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{
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NotHive,
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Fail,
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NoMemory,
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HiveSuccess,
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RecoverHeader,
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RecoverData,
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SelfHeal
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} RESULT;
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RESULT CMAPI
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HvpGetHiveHeader(IN PHHIVE Hive,
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IN PHBASE_BLOCK *HiveBaseBlock,
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IN PLARGE_INTEGER TimeStamp)
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{
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PHBASE_BLOCK BaseBlock;
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ULONG Result;
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ULONG Offset = 0;
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ASSERT(sizeof(HBASE_BLOCK) >= (HSECTOR_SIZE * Hive->Cluster));
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/* Assume failure and allocate the base block */
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*HiveBaseBlock = NULL;
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BaseBlock = HvpAllocBaseBlockAligned(Hive, TRUE, TAG_CM);
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if (!BaseBlock) return NoMemory;
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/* Clear it */
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RtlZeroMemory(BaseBlock, sizeof(HBASE_BLOCK));
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/* Now read it from disk */
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Result = Hive->FileRead(Hive,
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HFILE_TYPE_PRIMARY,
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&Offset,
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BaseBlock,
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Hive->Cluster * HSECTOR_SIZE);
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/* Couldn't read: assume it's not a hive */
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if (!Result) return NotHive;
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/* Do validation */
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if (!HvpVerifyHiveHeader(BaseBlock)) return NotHive;
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/* Return information */
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*HiveBaseBlock = BaseBlock;
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*TimeStamp = BaseBlock->TimeStamp;
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return HiveSuccess;
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}
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NTSTATUS CMAPI
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HvLoadHive(IN PHHIVE Hive,
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IN PCUNICODE_STRING FileName OPTIONAL)
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{
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NTSTATUS Status;
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PHBASE_BLOCK BaseBlock = NULL;
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ULONG Result;
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LARGE_INTEGER TimeStamp;
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ULONG Offset = 0;
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PVOID HiveData;
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ULONG FileSize;
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/* Get the hive header */
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Result = HvpGetHiveHeader(Hive, &BaseBlock, &TimeStamp);
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switch (Result)
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{
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/* Out of memory */
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case NoMemory:
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/* Fail */
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return STATUS_INSUFFICIENT_RESOURCES;
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/* Not a hive */
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case NotHive:
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/* Fail */
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return STATUS_NOT_REGISTRY_FILE;
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/* Has recovery data */
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case RecoverData:
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case RecoverHeader:
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/* Fail */
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return STATUS_REGISTRY_CORRUPT;
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}
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/* Set default boot type */
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BaseBlock->BootType = 0;
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/* Setup hive data */
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Hive->BaseBlock = BaseBlock;
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Hive->Version = BaseBlock->Minor;
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/* Allocate a buffer large enough to hold the hive */
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FileSize = HBLOCK_SIZE + BaseBlock->Length; // == sizeof(HBASE_BLOCK) + BaseBlock->Length;
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HiveData = Hive->Allocate(FileSize, TRUE, TAG_CM);
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if (!HiveData)
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{
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Hive->Free(BaseBlock, Hive->BaseBlockAlloc);
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return STATUS_INSUFFICIENT_RESOURCES;
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}
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/* Now read the whole hive */
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Result = Hive->FileRead(Hive,
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HFILE_TYPE_PRIMARY,
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&Offset,
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HiveData,
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FileSize);
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if (!Result)
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{
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Hive->Free(HiveData, FileSize);
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Hive->Free(BaseBlock, Hive->BaseBlockAlloc);
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return STATUS_NOT_REGISTRY_FILE;
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}
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// This is a HACK!
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/* Free our base block... it's usless in this implementation */
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Hive->Free(BaseBlock, Hive->BaseBlockAlloc);
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/* Initialize the hive directly from memory */
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Status = HvpInitializeMemoryHive(Hive, HiveData, FileName);
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if (!NT_SUCCESS(Status))
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Hive->Free(HiveData, FileSize);
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return Status;
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}
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/**
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* @name HvInitialize
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*
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* Allocate a new hive descriptor structure and intialize it.
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*
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* @param RegistryHive
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* Output variable to store pointer to the hive descriptor.
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* @param OperationType
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* - HV_OPERATION_CREATE_HIVE
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* Create a new hive for read/write access.
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* - HV_OPERATION_MEMORY
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* Load and copy in-memory hive for read/write access. The
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* pointer to data passed to this routine can be freed after
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* the function is executed.
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* - HV_OPERATION_MEMORY_INPLACE
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* Load an in-memory hive for read-only access. The pointer
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* to data passed to this routine MUSTN'T be freed until
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* HvFree is called.
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* @param ChunkBase
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* Pointer to hive data.
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* @param ChunkSize
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* Size of passed hive data.
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*
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* @return
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* STATUS_NO_MEMORY - A memory allocation failed.
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* STATUS_REGISTRY_CORRUPT - Registry corruption was detected.
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* STATUS_SUCCESS
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*
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* @see HvFree
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*/
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NTSTATUS CMAPI
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HvInitialize(
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PHHIVE RegistryHive,
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ULONG OperationType,
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ULONG HiveFlags,
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ULONG FileType,
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PVOID HiveData OPTIONAL,
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PALLOCATE_ROUTINE Allocate,
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PFREE_ROUTINE Free,
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|
PFILE_SET_SIZE_ROUTINE FileSetSize,
|
|
PFILE_WRITE_ROUTINE FileWrite,
|
|
PFILE_READ_ROUTINE FileRead,
|
|
PFILE_FLUSH_ROUTINE FileFlush,
|
|
ULONG Cluster OPTIONAL,
|
|
PCUNICODE_STRING FileName OPTIONAL)
|
|
{
|
|
NTSTATUS Status;
|
|
PHHIVE Hive = RegistryHive;
|
|
|
|
/*
|
|
* Create a new hive structure that will hold all the maintenance data.
|
|
*/
|
|
|
|
RtlZeroMemory(Hive, sizeof(HHIVE));
|
|
|
|
Hive->Allocate = Allocate;
|
|
Hive->Free = Free;
|
|
Hive->FileSetSize = FileSetSize;
|
|
Hive->FileWrite = FileWrite;
|
|
Hive->FileRead = FileRead;
|
|
Hive->FileFlush = FileFlush;
|
|
|
|
Hive->RefreshCount = 0;
|
|
Hive->StorageTypeCount = HTYPE_COUNT;
|
|
Hive->Cluster = Cluster;
|
|
Hive->BaseBlockAlloc = sizeof(HBASE_BLOCK); // == HBLOCK_SIZE
|
|
|
|
Hive->Version = HSYS_MINOR;
|
|
#if (NTDDI_VERSION < NTDDI_VISTA)
|
|
Hive->Log = (FileType == HFILE_TYPE_LOG);
|
|
#endif
|
|
Hive->HiveFlags = HiveFlags & ~HIVE_NOLAZYFLUSH;
|
|
|
|
switch (OperationType)
|
|
{
|
|
case HINIT_CREATE:
|
|
Status = HvpCreateHive(Hive, FileName);
|
|
break;
|
|
|
|
case HINIT_MEMORY:
|
|
Status = HvpInitializeMemoryHive(Hive, HiveData, FileName);
|
|
break;
|
|
|
|
case HINIT_FLAT:
|
|
Status = HvpInitializeFlatHive(Hive, HiveData);
|
|
break;
|
|
|
|
case HINIT_FILE:
|
|
{
|
|
Status = HvLoadHive(Hive, FileName);
|
|
if ((Status != STATUS_SUCCESS) &&
|
|
(Status != STATUS_REGISTRY_RECOVERED))
|
|
{
|
|
/* Unrecoverable failure */
|
|
return Status;
|
|
}
|
|
|
|
/* Check for previous damage */
|
|
ASSERT(Status != STATUS_REGISTRY_RECOVERED);
|
|
break;
|
|
}
|
|
|
|
case HINIT_MEMORY_INPLACE:
|
|
// Status = HvpInitializeMemoryInplaceHive(Hive, HiveData);
|
|
// break;
|
|
|
|
case HINIT_MAPFILE:
|
|
|
|
default:
|
|
/* FIXME: A better return status value is needed */
|
|
Status = STATUS_NOT_IMPLEMENTED;
|
|
ASSERT(FALSE);
|
|
}
|
|
|
|
if (!NT_SUCCESS(Status)) return Status;
|
|
|
|
/* HACK: ROS: Init root key cell and prepare the hive */
|
|
// r31253
|
|
// if (OperationType == HINIT_CREATE) CmCreateRootNode(Hive, L"");
|
|
if (OperationType != HINIT_CREATE) CmPrepareHive(Hive);
|
|
|
|
return Status;
|
|
}
|
|
|
|
/**
|
|
* @name HvFree
|
|
*
|
|
* Free all stroage and handles associated with hive descriptor.
|
|
* But do not free the hive descriptor itself.
|
|
*/
|
|
VOID CMAPI
|
|
HvFree(
|
|
PHHIVE RegistryHive)
|
|
{
|
|
if (!RegistryHive->ReadOnly)
|
|
{
|
|
/* Release hive bitmap */
|
|
if (RegistryHive->DirtyVector.Buffer)
|
|
{
|
|
RegistryHive->Free(RegistryHive->DirtyVector.Buffer, 0);
|
|
}
|
|
|
|
HvpFreeHiveBins(RegistryHive);
|
|
|
|
/* Free the BaseBlock */
|
|
if (RegistryHive->BaseBlock)
|
|
{
|
|
RegistryHive->Free(RegistryHive->BaseBlock, RegistryHive->BaseBlockAlloc);
|
|
RegistryHive->BaseBlock = NULL;
|
|
}
|
|
}
|
|
}
|
|
|
|
/* EOF */
|