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632 lines
15 KiB
632 lines
15 KiB
/******************************************************************************
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*
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* Copyright (c) 1999 Microsoft Corporation
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*
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* Module Name:
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* verifyBlob.c
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*
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* Abstract:
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* This file contains blob verification code
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*
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* Revision History:
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* Neal Christiansen (nealch) 12/18/2000
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*
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*****************************************************************************/
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BOOL
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VerifyBlobHeader(
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BlobHeader *BlobHead,
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PCHAR Name,
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DWORD BlobType
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)
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/*++
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Routine Description:
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Verify that the given BLOB Header is valid
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Arguments:
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Return Value:
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TRUE if OK else FALSE
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--*/
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{
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BOOL good = TRUE;
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if (BlobHead->m_dwVersion != BLOB_VERSION_NUM) {
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printf("Invalid VERSION in %s blob header, was %08x, should be %08x\n",
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Name,
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BlobHead->m_dwVersion,
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BLOB_VERSION_NUM);
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good = FALSE;
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}
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if (BlobHead->m_dwBlbType != BlobType) {
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printf("Invalid TYPE in %s blob header, was %08x, should be %08x\n",
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Name,
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BlobHead->m_dwBlbType,
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BlobType);
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good = FALSE;
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}
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if (BlobHead->m_dwMagicNum != BLOB_MAGIC_NUM) {
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printf("Invalid MAGIC NUMBER in %s blob header, was %08x, should be %08x\n",
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Name,
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BlobHead->m_dwMagicNum,
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BLOB_MAGIC_NUM);
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good = FALSE;
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}
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if ((BlobHead->m_dwEntries <= 0) || (BlobHead->m_dwEntries >= 10000)) {
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printf("Invalid ENTRIES in %s blob header, was %08x, should be > 0 and < 10,000\n",
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Name,
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BlobHead->m_dwEntries);
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good = FALSE;
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}
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return good;
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}
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BOOL
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VerifyHashHeader(
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ListHeader *HashHead,
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PCHAR Name,
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DWORD Offset
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)
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/*++
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Routine Description:
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Verify that the given TREE Header is valid
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Arguments:
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Return Value:
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TRUE if OK else FALSE
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--*/
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{
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BOOL good = TRUE;
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DWORD calculatedSize;
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DWORD numNodes;
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//
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// Verify BLOB header
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//
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if (!VerifyBlobHeader(&HashHead->m_BlobHeader,Name,BLOB_TYPE_HASHLIST)) {
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return FALSE;
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}
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//
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// paulmcd: jan/2001
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// m_iHashBuckets will not be exact with m_dwEntries as it is the next
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// highest prime number. but it will always be larger than or equalto.
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//
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if (HashHead->m_iHashBuckets < HashHead->m_BlobHeader.m_dwEntries) {
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printf("Invalid HASH BUCKET COUNT in %s header, is %08x, should be %08x or %08x\n",
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Name,
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HashHead->m_iHashBuckets,
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HashHead->m_BlobHeader.m_dwEntries,
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HashHead->m_BlobHeader.m_dwEntries+1);
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good = FALSE;
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}
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if ((HashHead->m_dwDataOff != HashHead->m_BlobHeader.m_dwMaxSize)) {
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printf("Invalid DATA OFFSET in %s header, is %08x, should be %08x\n",
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Name,
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HashHead->m_dwDataOff,
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HashHead->m_BlobHeader.m_dwMaxSize);
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good = FALSE;
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}
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if ((HashHead->m_iFreeNode != 0)) {
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printf("Invalid FREE NODE in %s header, is %08x, should be 0\n",
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Name,
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HashHead->m_iFreeNode);
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good = FALSE;
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}
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//
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// Make sure the calucalted size is accurate
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//
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numNodes = HashHead->m_BlobHeader.m_dwEntries + 1;
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calculatedSize = sizeof(ListHeader) +
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(HashHead->m_iHashBuckets * sizeof(DWORD)) +
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(numNodes * sizeof(ListEntry));
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if (calculatedSize >= HashHead->m_BlobHeader.m_dwMaxSize) {
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printf("Invalid CALCULATED SIZE in %s header, is %08x, should be < %08x\n",
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Name,
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calculatedSize,
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HashHead->m_BlobHeader.m_dwMaxSize);
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good = FALSE;
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}
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return good;
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}
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BOOL
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VerifyHash(
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ListHeader *HashHead,
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PCHAR Name,
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DWORD Offset
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)
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/*++
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Routine Description:
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Verify that the given TREE entries are valid
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Arguments:
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Return Value:
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TRUE if OK else FALSE
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--*/
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{
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BOOL good = TRUE;
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UINT i;
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DWORD dataStart;
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DWORD numNodes;
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DWORD numBuckets;
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DWORD *hTable;
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ListEntry *hNode;
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//
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// Validate the HEADER
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//
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if (!VerifyHashHeader(HashHead,Name,Offset)) {
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return FALSE;
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}
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//
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// paulmcd: we have hash bucket and actual nodes. there is one extra
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// actual node than reported due to offset zero being null. the bucket
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// count is the next largest prime from numNodes
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//
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numBuckets = HashHead->m_iHashBuckets;
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numNodes = HashHead->m_BlobHeader.m_dwEntries + 1;
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//
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// Validate Hash table entries
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//
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hTable = (DWORD *)(HashHead + 1);
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for (i=0;i < HashHead->m_iHashBuckets;i++,hTable++) {
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if (*hTable >= numNodes) {
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printf("Invalid HASH TABLE ENTRY[%d] in %s, is %08x, should be < %08x\n",
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i,
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Name,
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*hTable,
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numNodes);
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good = FALSE;
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}
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}
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//
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// Validate the start of the Hash LIST entries
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//
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{
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ULONG_PTR actualOffset;
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ULONG_PTR calculatedOffset;
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actualOffset = (ULONG_PTR)hTable - (ULONG_PTR)HashHead;
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calculatedOffset = sizeof(ListHeader) +
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(HashHead->m_iHashBuckets * sizeof(DWORD));
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if (calculatedOffset != actualOffset) {
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printf("Invalid HASH LIST START in %s, offset is %08x, should be %08x\n",
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Name,
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actualOffset,
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calculatedOffset);
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return FALSE;
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}
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}
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//
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// Validate the Hash DATA entries
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//
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hNode = (ListEntry *)hTable;
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dataStart = sizeof(ListHeader) +
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(HashHead->m_iHashBuckets * sizeof(DWORD)) +
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(numNodes * sizeof(ListEntry));
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for (i=0;i < numNodes;i++,hNode++) {
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if ((hNode->m_iNext < 0) ||
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(hNode->m_iNext >= (INT)HashHead->m_iHashBuckets)) {
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printf("Invalid HASH NODE[%d] NEXT INDEX in %s, is %08x, should be < %08x\n",
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i,
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Name,
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hNode->m_iNext,
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HashHead->m_iHashBuckets);
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good = FALSE;
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}
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if ((hNode->m_dwData != 0) &&
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((hNode->m_dwData < dataStart) ||
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(hNode->m_dwData >= HashHead->m_BlobHeader.m_dwMaxSize))) {
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printf("Invalid HASH NODE[%d] DATA INDEX in %s, is %08x, should be >= %08x and < %08x\n",
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i,
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Name,
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hNode->m_dwData,
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dataStart,
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HashHead->m_BlobHeader.m_dwMaxSize);
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good = FALSE;
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} else if ((hNode->m_dwData != 0) &&
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((WCHAR)hNode->m_dwDataLen != *(PWCHAR)((DWORD_PTR)HashHead + hNode->m_dwData))) {
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printf("Invalid HASH NODE[%d] DATA LENGTH in %s, is %08x, should be %08x\n",
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i,
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Name,
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hNode->m_dwDataLen,
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*(PWCHAR)((DWORD_PTR)HashHead + hNode->m_dwData));
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good = FALSE;
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}
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if ((hNode->m_dwType != NODE_TYPE_UNKNOWN) &&
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(hNode->m_dwType != NODE_TYPE_INCLUDE) &&
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(hNode->m_dwType != NODE_TYPE_EXCLUDE))
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{
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printf("Invalid HASH NODE[%d] TYPE in %s, is %08x, should be %08x, %08x or %08x\n",
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i,
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Name,
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hNode->m_dwType,
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NODE_TYPE_UNKNOWN,
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NODE_TYPE_INCLUDE,
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NODE_TYPE_EXCLUDE);
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good = FALSE;
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}
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}
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return good;
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}
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BOOL
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VerifyTreeHeader(
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TreeHeader *TreeHead,
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PCHAR Name
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)
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/*++
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Routine Description:
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Verify that the given TREE Header is valid
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Arguments:
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Return Value:
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TRUE if OK else FALSE
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--*/
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{
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BOOL good = TRUE;
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DWORD calculatedSize;
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//
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// Verify BLOB header
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//
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if (!VerifyBlobHeader(&TreeHead->m_BlobHeader,Name,BLOB_TYPE_PATHTREE)) {
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return FALSE;
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}
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if ((TreeHead->m_dwMaxNodes != TreeHead->m_BlobHeader.m_dwEntries)) {
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printf("Invalid MAX NODES in %s header, is %08x, should be %08x\n",
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Name,
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TreeHead->m_dwMaxNodes,
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TreeHead->m_BlobHeader.m_dwEntries);
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good = FALSE;
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}
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if ((TreeHead->m_dwDataSize >= TreeHead->m_BlobHeader.m_dwMaxSize)) {
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printf("Invalid DATA SIZE in %s header, is %08x, should be < %08x\n",
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Name,
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TreeHead->m_dwDataSize,
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TreeHead->m_BlobHeader.m_dwMaxSize);
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good = FALSE;
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}
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if ((TreeHead->m_dwDataOff != TreeHead->m_BlobHeader.m_dwMaxSize)) {
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printf("Invalid DATA OFFSET in %s header, is %08x, should be %08x\n",
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Name,
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TreeHead->m_dwDataOff,
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TreeHead->m_BlobHeader.m_dwMaxSize);
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good = FALSE;
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}
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if ((TreeHead->m_iFreeNode != 0)) {
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printf("Invalid FREE NODE in %s header, is %08x, should be 0\n",
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Name,
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TreeHead->m_iFreeNode);
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good = FALSE;
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}
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if ((TreeHead->m_dwDefault != NODE_TYPE_EXCLUDE)) {
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printf("Invalid DEFAULT in %s header, is %08x, should be %08x\n",
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Name,
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TreeHead->m_dwDefault,
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NODE_TYPE_EXCLUDE);
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good = FALSE;
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}
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//
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// Make sure the calucalted size is accurate
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//
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calculatedSize = sizeof(TreeHeader) +
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(TreeHead->m_dwMaxNodes * sizeof(TreeNode)) +
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TreeHead->m_dwDataSize;
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if (calculatedSize != TreeHead->m_BlobHeader.m_dwMaxSize) {
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printf("Invalid CALCULATED SIZE in %s header, is %08x, should be %08x\n",
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Name,
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calculatedSize,
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TreeHead->m_BlobHeader.m_dwMaxSize);
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good = FALSE;
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}
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return good;
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}
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BOOL
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VerifyTree(
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TreeHeader *TreeHead,
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PCHAR Name,
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DWORD Offset
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)
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/*++
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Routine Description:
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Verify that the given TREE entries are valid
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Arguments:
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Return Value:
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TRUE if OK else FALSE
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--*/
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{
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BOOL good = TRUE;
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UINT i;
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DWORD dataStart;
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TreeNode *tn;
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ListHeader *localHashHead;
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char localName[128];
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//
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// Validate the HEADER
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//
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if (!VerifyTreeHeader(TreeHead,Name)) {
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return FALSE;
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}
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//
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// Validate the DATA entries
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//
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tn = (TreeNode *)(TreeHead + 1);
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dataStart = sizeof(TreeHeader) +
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(TreeHead->m_dwMaxNodes * sizeof(TreeNode));
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for (i=0;i < TreeHead->m_dwMaxNodes;i++,tn++) {
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if ((tn->m_iFather < 0) ||
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(tn->m_iFather >= (INT)TreeHead->m_dwMaxNodes))
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{
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printf("Invalid TREE NODE[%d] FATHER index in %s, is %08x, should be < %08x\n",
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i,
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Name,
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tn->m_iFather,
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TreeHead->m_dwMaxNodes);
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good = FALSE;
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}
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if ((tn->m_iSon < 0) ||
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(tn->m_iSon >= (INT)TreeHead->m_dwMaxNodes))
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{
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printf("Invalid TREE NODE[%d] SON index in %s, is %08x, should be < %08x\n",
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i,
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Name,
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tn->m_iSon,
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TreeHead->m_dwMaxNodes);
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good = FALSE;
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}
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if ((tn->m_iSibling < 0) ||
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(tn->m_iSibling >= (INT)TreeHead->m_dwMaxNodes))
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{
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printf("Invalid TREE NODE[%d] SIBLING index in %s, is %08x, should be < %08x\n",
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i,
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Name,
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tn->m_iSibling,
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TreeHead->m_dwMaxNodes);
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good = FALSE;
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}
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if ((tn->m_dwData < dataStart) ||
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(tn->m_dwData >= TreeHead->m_BlobHeader.m_dwMaxSize))
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{
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printf("Invalid TREE NODE[%d] DATA index in %s, is %08x, should be >= %08x and < %08x\n",
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i,
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Name,
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tn->m_dwData,
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dataStart,
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TreeHead->m_BlobHeader.m_dwMaxSize);
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good = FALSE;
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}
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if (tn->m_dwFileList != 0) {
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if ((tn->m_dwFileList < dataStart) ||
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(tn->m_dwFileList >= TreeHead->m_BlobHeader.m_dwMaxSize))
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{
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printf("Invalid TREE NODE[%d] FILELIST index in %s, is %08x, should be >= %08x and < %08x\n",
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i,
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Name,
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tn->m_dwData,
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dataStart,
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TreeHead->m_BlobHeader.m_dwMaxSize);
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good = FALSE;
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} else {
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localHashHead = (ListHeader *)((DWORD_PTR)TreeHead + tn->m_dwFileList);
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sprintf(localName,"TreeNode[%d]",i);
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if (!VerifyHash(localHashHead,localName,(Offset+tn->m_dwFileList))) {
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good = FALSE;
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}
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}
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}
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if ((tn->m_dwType != NODE_TYPE_UNKNOWN) &&
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(tn->m_dwType != NODE_TYPE_INCLUDE) &&
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(tn->m_dwType != NODE_TYPE_EXCLUDE))
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{
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printf("Invalid TREE NODE[%d] TYPE in %s, is %08x, should be %08x, %08x or %08x\n",
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i,
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Name,
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tn->m_dwType,
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NODE_TYPE_UNKNOWN,
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NODE_TYPE_INCLUDE,
|
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NODE_TYPE_EXCLUDE);
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good = FALSE;
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}
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}
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return good;
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}
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BOOL
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VerifyBlob(
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DWORD_PTR Blob
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)
|
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/*++
|
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|
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Routine Description:
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|
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Verify that the given BLOB is valid
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Arguments:
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|
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Return Value:
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TRUE if OK else FALSE
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|
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--*/
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{
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BlobHeader *blobHead;
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TreeHeader *treeHead;
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ListHeader *hashHead;
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DWORD calculatedSize = 0;
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|
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//
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// Verify header to entire blob
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//
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blobHead = (BlobHeader *)Blob;
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|
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if (!VerifyBlobHeader(blobHead,"PRIMARY",BLOB_TYPE_CONTAINER)) {
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return FALSE;
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}
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|
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calculatedSize += sizeof(BlobHeader);
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|
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//
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// Verify TreeHeader and Data
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//
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treeHead = (TreeHeader *)(Blob + calculatedSize);
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if (!VerifyTree(treeHead,"PRIMARY TREE",calculatedSize)) {
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return FALSE;
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}
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calculatedSize += treeHead->m_BlobHeader.m_dwMaxSize;
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|
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//
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// Verify HashHeader and DATA
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//
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hashHead = (ListHeader *)(Blob + calculatedSize);
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|
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if (!VerifyHash(hashHead,"PRIMARY HASH",calculatedSize)) {
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return FALSE;
|
|
}
|
|
|
|
calculatedSize += hashHead->m_BlobHeader.m_dwMaxSize;
|
|
|
|
//
|
|
// Validate total SIZE
|
|
//
|
|
|
|
if (calculatedSize != blobHead->m_dwMaxSize) {
|
|
|
|
printf("Invalid PRIMARY BLOB size, is %08x, calculated to be %08x\n",
|
|
blobHead->m_dwMaxSize,
|
|
calculatedSize);
|
|
return FALSE;
|
|
}
|
|
|
|
|
|
return TRUE;
|
|
}
|