318 lines
9.5 KiB
C
318 lines
9.5 KiB
C
/*++
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Copyright (c) 1991-1992 Microsoft Corporation
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Module Name:
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AudArray.c
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Abstract:
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This file contains RxpConvertAuditArray.
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Author:
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John Rogers (JohnRo) 05-Nov-1991
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Environment:
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Portable to any flat, 32-bit environment. (Uses Win32 typedefs.)
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Requires ANSI C extensions: slash-slash comments, long external names.
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Notes:
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The logic in ErrConv.c is based on the logic in AudArray.c.
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Make sure that you check both files if you find a bug in either.
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Revision History:
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05-Nov-1991 JohnRo
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Created.
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08-Nov-1991 JohnRo
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Fix array increment bug. Fixed wrong inp var ptr being passed to
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convert variable data.
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22-Nov-1991 JohnRo
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Set ae_data_size field.
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07-Feb-1992 JohnRo
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Use NetApiBufferAllocate() instead of private version.
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16-Jun-1992 JohnRo
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RAID 10311: NetAuditRead and NetErrorLogRead pointer arithmetic wrong.
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Use PREFIX_ equates.
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07-Jul-1992 JohnRo
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RAID 9933: ALIGN_WORST should be 8 for x86 builds.
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17-Aug-1992 JohnRo
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RAID 2920: Support UTC timezone in net code.
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01-Oct-1992 JohnRo
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RAID 3556: Added NetpSystemTimeToGmtTime() for DosPrint APIs.
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30-Oct-1992 JohnRo
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RAID 10218: Fixed potential trash of output record for unknown entries.
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--*/
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// These must be included first:
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#include <windows.h> // IN, LPTSTR, etc.
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#include <lmcons.h> // DEVLEN, NET_API_STATUS, etc.
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#include <lmaudit.h> // Needed by rxaudit.h
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// These may be included in any order:
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#include <align.h> // ALIGN_ and ROUND_ equates.
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#include <lmapibuf.h> // NetApiBufferAllocate().
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#include <lmerr.h> // ERROR_ and NERR_ equates.
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#include <netdebug.h> // NetpKdPrint(()), FORMAT_ equates.
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#include <prefix.h> // PREFIX_ equates.
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#include <rxaudit.h> // RxpAudit routine prototypes.
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#include <rxp.h> // RxpEstimateLogSize().
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#include <rxpdebug.h> // IF_DEBUG().
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#include <smbgtpt.h> // Smb{Get,Put} macros.
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#include <timelib.h> // NetpLocalTimeToGmtTime().
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#define DOWNLEVEL_AUDIT_FIXED_ENTRY_SIZE \
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( 2 /* ae_len */ \
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+ 2 /* ae_reserved */ \
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+ 4 /* ae_time */ \
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+ 2 /* ae_type */ \
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+ 2 ) /* ae_data_offset */
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#define MIN_DOWNLEVEL_ENTRY_SIZE \
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( DOWNLEVEL_AUDIT_FIXED_ENTRY_SIZE \
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+ 2 /* min variable data size */ \
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+ 2 ) /* ae_len2 */
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NET_API_STATUS
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RxpConvertAuditArray(
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IN LPVOID InputArray,
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IN DWORD InputByteCount,
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OUT LPBYTE * OutputArrayPtr, // will be alloc'ed (free w/ NetApiBufferFree).
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OUT LPDWORD OutputByteCountPtr
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)
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{
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DWORD EntryType;
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const LPBYTE InputArrayEndPtr
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= (LPVOID) ( ((LPBYTE)InputArray) + InputByteCount );
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LPBYTE InputBytePtr;
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DWORD InputDataOffset;
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DWORD InputTotalEntrySize;
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LPBYTE InputFixedPtr;
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LPBYTE InputVariablePtr;
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DWORD InputVariableSize;
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LPVOID OutputArray;
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DWORD OutputArraySize;
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DWORD OutputBytesUsed = 0;
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DWORD OutputEntrySizeSoFar;
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LPAUDIT_ENTRY OutputFixedPtr;
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DWORD OutputVariableSize;
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LPBYTE OutputVariablePtr;
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NET_API_STATUS Status;
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//
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// Error check caller's parameters.
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// Set output parameters to make error handling easier below.
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// (Also check for memory faults while we're at it.)
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//
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if (OutputArrayPtr != NULL) {
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*OutputArrayPtr = NULL;
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}
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if (OutputByteCountPtr != NULL) {
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*OutputByteCountPtr = 0;
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}
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if ( (OutputArrayPtr == NULL) || (OutputByteCountPtr == NULL) ) {
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return (ERROR_INVALID_PARAMETER);
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}
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if ( (InputArray == NULL) || (InputByteCount == 0) ) {
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return (ERROR_INVALID_PARAMETER);
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}
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//
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// Compute size needed for output buffer, taking into account:
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// per field expansion,
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// per entry expansion,
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// and alignment.
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//
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Status = RxpEstimateLogSize(
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DOWNLEVEL_AUDIT_FIXED_ENTRY_SIZE,
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InputByteCount, // input (downlevel) array size in bytes.
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FALSE, // no, we're not doing error log
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& OutputArraySize); // set estimated array size in bytes.
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if (Status != NO_ERROR) {
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return (Status); // (output vars are already set.)
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}
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NetpAssert( OutputArraySize > 0 );
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NetpAssert( OutputArraySize > InputByteCount );
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*OutputByteCountPtr = OutputArraySize;
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//
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// Allocate oversize area for output; we'll realloc it to shrink it.
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//
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Status = NetApiBufferAllocate(
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OutputArraySize,
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(LPVOID *) & OutputArray );
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if (Status != NERR_Success) {
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return (Status); // (output vars are already set.)
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}
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NetpAssert( OutputArray != NULL );
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NetpAssert( POINTER_IS_ALIGNED( OutputArray, ALIGN_WORST ) );
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//
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// Loop for each entry in the input area.
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//
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OutputFixedPtr = OutputArray;
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for (InputBytePtr = InputArray; InputBytePtr < InputArrayEndPtr; ) {
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InputFixedPtr = InputBytePtr;
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NetpAssert( POINTER_IS_ALIGNED( OutputFixedPtr, ALIGN_WORST ) );
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IF_DEBUG(AUDIT) {
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NetpKdPrint(( PREFIX_NETLIB
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"RxpConvertAuditArray: doing input entry at "
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FORMAT_LPVOID ", out entry at " FORMAT_LPVOID ".\n",
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(LPVOID) InputFixedPtr, (LPVOID) OutputFixedPtr ));
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}
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//
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// Process each field in input fixed entry.
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//
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InputTotalEntrySize = (DWORD) SmbGetUshort( (LPWORD) InputBytePtr );
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if (InputTotalEntrySize < MIN_DOWNLEVEL_ENTRY_SIZE) {
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goto FileCorrupt;
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}
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{
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LPBYTE EndPos = InputBytePtr + InputTotalEntrySize;
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if (EndPos > InputArrayEndPtr) {
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goto FileCorrupt;
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}
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EndPos -= sizeof(WORD); // the last ae_len2
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if (SmbGetUshort( (LPWORD) EndPos ) != InputTotalEntrySize) {
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goto FileCorrupt;
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}
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}
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InputBytePtr += sizeof(WORD); // skip ae_len.
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OutputFixedPtr->ae_reserved =
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(DWORD) SmbGetUshort( (LPWORD) InputBytePtr );
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InputBytePtr += sizeof(WORD); // skip ae_reserved
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{
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DWORD LocalTime = (DWORD) SmbGetUlong( (LPDWORD) InputBytePtr );
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DWORD GmtTime;
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NetpLocalTimeToGmtTime( LocalTime, & GmtTime );
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OutputFixedPtr->ae_time = GmtTime;
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InputBytePtr += sizeof(DWORD);
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}
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EntryType = (DWORD) SmbGetUshort( (LPWORD) InputBytePtr );
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OutputFixedPtr->ae_type = EntryType;
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InputBytePtr += sizeof(WORD);
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InputDataOffset = (DWORD) SmbGetUshort( (LPWORD) InputBytePtr );
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NetpAssert( InputDataOffset >= DOWNLEVEL_AUDIT_FIXED_ENTRY_SIZE );
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InputBytePtr += sizeof(WORD);
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OutputEntrySizeSoFar = sizeof(AUDIT_ENTRY);
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//
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// Process variable portion (if any):
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//
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InputVariablePtr = (LPVOID)
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( ((LPBYTE) InputFixedPtr) + InputDataOffset );
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InputVariableSize =
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(InputTotalEntrySize - InputDataOffset)
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- sizeof(WORD); // don't include ae_len2.
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OutputVariablePtr = (LPVOID)
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( ((LPBYTE) OutputFixedPtr) + sizeof(AUDIT_ENTRY) );
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// Align variable part.
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OutputVariablePtr = ROUND_UP_POINTER( OutputVariablePtr, ALIGN_WORST );
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OutputEntrySizeSoFar =
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ROUND_UP_COUNT( OutputEntrySizeSoFar, ALIGN_WORST );
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OutputFixedPtr->ae_data_offset = OutputEntrySizeSoFar;
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// Copy and convert the variable part.
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RxpConvertAuditEntryVariableData(
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EntryType,
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InputVariablePtr,
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OutputVariablePtr,
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InputVariableSize,
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& OutputVariableSize);
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#ifdef REVISED_AUDIT_ENTRY_STRUCT
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OutputFixedPtr->ae_data_size = OutputVariableSize;
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#endif
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// Account for variable area and ae_len2 in total length.
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OutputEntrySizeSoFar += (OutputVariableSize + sizeof(DWORD));
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// Round size up so next entry (if any) is worst-case aligned.
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OutputEntrySizeSoFar =
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ROUND_UP_COUNT( OutputEntrySizeSoFar, ALIGN_WORST );
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#define OutputEntrySize OutputEntrySizeSoFar
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OutputFixedPtr->ae_len = OutputEntrySize;
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{
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LPDWORD EndSizePtr = (LPVOID)
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( ((LPBYTE)OutputFixedPtr)
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+ OutputEntrySize - sizeof(DWORD) );
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*EndSizePtr = OutputEntrySize; // set ae_len2.
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}
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//
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// Update for next loop iteration.
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//
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InputBytePtr = (LPVOID)
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( ((LPBYTE) InputFixedPtr)
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+ InputTotalEntrySize);
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OutputFixedPtr = (LPVOID)
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( ((LPBYTE) OutputFixedPtr) + OutputEntrySize );
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OutputBytesUsed += OutputEntrySize;
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NetpAssert( OutputBytesUsed <= OutputArraySize );
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}
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NetpAssert(OutputBytesUsed > 0);
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NetpAssert( OutputBytesUsed <= OutputArraySize );
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*OutputArrayPtr = OutputArray;
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*OutputByteCountPtr = OutputBytesUsed;
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return (NERR_Success);
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FileCorrupt:
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NetpKdPrint(( PREFIX_NETAPI
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"RxpConvertAuditArray: corrupt audit log!\n" ));
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if (OutputArray != NULL) {
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(VOID) NetApiBufferFree( OutputArray );
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}
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if (OutputArrayPtr != NULL) {
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*OutputArrayPtr = NULL;
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}
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if (OutputByteCountPtr != NULL) {
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*OutputByteCountPtr = 0;
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}
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return (NERR_LogFileCorrupt);
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}
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