1362 lines
38 KiB
C
1362 lines
38 KiB
C
//depot/Lab02_N/Net/sfm/afp/server/access.c#2 - edit change 2054 (text)
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/*
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Copyright (c) 1992 Microsoft Corporation
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Module Name:
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access.c
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Abstract:
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This module contains the routines for handling access related stuff.
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Author:
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Jameel Hyder (microsoft!jameelh)
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Revision History:
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20 Sep 1992 Initial Version
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Notes: Tab stop: 4
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--*/
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#define FILENUM FILE_ACCESS
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#include <afp.h>
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#include <fdparm.h>
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#include <pathmap.h>
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#define _ACCESS_LOCALS
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#include <access.h>
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#include <client.h>
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#include <secutil.h>
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#include <seposix.h>
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#ifdef ALLOC_PRAGMA
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#pragma alloc_text( PAGE, afpIsUserMemberOfGroup)
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#pragma alloc_text( PAGE, AfpGetUserAndPrimaryGroupSids)
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#pragma alloc_text( PAGE, AfpMakeSecurityDescriptorForUser)
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#pragma alloc_text( PAGE, AfpGetAfpPermissions)
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#pragma alloc_text( PAGE, afpMoveAces)
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#pragma alloc_text( PAGE, AfpSetAfpPermissions)
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#pragma alloc_text( PAGE, afpPermissions2NtMask)
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#pragma alloc_text( PAGE, afpAddAceToAcl)
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#if DBG
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#pragma alloc_text( PAGE, AfpDumpSid)
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#pragma alloc_text( PAGE, AfpDumpSidnMask)
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#endif
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#endif
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/*** afpIsUserMemberOfGroup
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*
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* Determine if the User is member of the given group, if it is a group.
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*/
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LOCAL BOOLEAN
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afpIsUserMemberOfGroup(
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IN PTOKEN_GROUPS pGroups,
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IN PSID pSidGroup
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)
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{
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DWORD i;
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BOOLEAN IsAMember = False;
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PAGED_CODE( );
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ASSERT ((pGroups != NULL) && (pSidGroup != NULL));
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AfpDumpSid("afpIsUserMemberOfGroup: Checking", pSidGroup);
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DBGPRINT(DBG_COMP_SECURITY, DBG_LEVEL_INFO,
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("afpIsUserMemberOfGroup: # of groups is %d\n", pGroups->GroupCount));
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for (i = 0; i < pGroups->GroupCount; i++)
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{
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AfpDumpSid("afpIsUserMemberOfGroup: Checking with", pGroups->Groups[i].Sid);
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if (RtlEqualSid(pSidGroup, pGroups->Groups[i].Sid))
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{
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IsAMember = True;
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DBGPRINT(DBG_COMP_SECURITY, DBG_LEVEL_INFO,
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("afpIsUserMemberOfGroup: Yes !!\n"));
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break;
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}
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}
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return IsAMember;
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}
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/*** AfpGetUserAndPrimaryGroupSids
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*
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* Get the Sids corres. to the user and his primary group.
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*/
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NTSTATUS
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AfpGetUserAndPrimaryGroupSids(
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IN PSDA pSda
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)
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{
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DWORD i, j;
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NTSTATUS Status = STATUS_SUCCESS;
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DWORD SidLength, SizeNeeded, ExtraSpace, Offset;
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PSID_AND_ATTRIBUTES pSidnAttr;
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PTOKEN_GROUPS pGroups;
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BYTE GrpsBuffer[1024];
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BYTE Buffer[256]; // We should not need a buffer larger
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// than this for User SID_AND_ATTRIBUTES
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PAGED_CODE( );
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do
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{
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pGroups = (PTOKEN_GROUPS)GrpsBuffer;
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pSda->sda_pGroups = NULL;
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if (pSda->sda_ClientType == SDA_CLIENT_GUEST)
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{
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pSda->sda_UserSid = &AfpSidWorld;
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pSda->sda_GroupSid = &AfpSidWorld; // Primary group of Guest is also 'World'
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break;
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}
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pSidnAttr = (PSID_AND_ATTRIBUTES)Buffer;
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// Get the Owner Sid out of the User token and copy it into the Sda
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Status = NtQueryInformationToken(pSda->sda_UserToken,
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TokenOwner,
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pSidnAttr,
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sizeof(Buffer),
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&SizeNeeded);
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ASSERT (NT_SUCCESS(Status));
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if (!NT_SUCCESS(Status))
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{
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break;
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}
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AfpDumpSid("AfpGetUserAndPrimaryGroupSids: LOGON Owner Sid", pSidnAttr->Sid);
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SidLength = RtlLengthSid(pSidnAttr->Sid);
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pSda->sda_UserSid = (PSID)ALLOC_ACCESS_MEM(SidLength);
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if (pSda->sda_UserSid == NULL)
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{
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Status = STATUS_INSUFFICIENT_RESOURCES;
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break;
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}
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RtlCopyMemory(pSda->sda_UserSid, pSidnAttr->Sid, SidLength);
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// Get the primary group of this user
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Status = NtQueryInformationToken(pSda->sda_UserToken,
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TokenPrimaryGroup,
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pSidnAttr,
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sizeof(Buffer),
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&SizeNeeded);
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ASSERT (NT_SUCCESS(Status));
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if (!NT_SUCCESS(Status))
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{
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break;
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}
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AfpDumpSid("AfpGetUserAndPrimaryGroupSids: LOGON Group Sid", pSidnAttr->Sid);
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SidLength = RtlLengthSid(pSidnAttr->Sid);
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pSda->sda_GroupSid = (PSID)ALLOC_ACCESS_MEM(SidLength);
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if (pSda->sda_GroupSid == NULL)
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{
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Status = STATUS_INSUFFICIENT_RESOURCES;
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break;
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}
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RtlCopyMemory(pSda->sda_GroupSid, pSidnAttr->Sid, SidLength);
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// Get the User Sid out of the User token. This will be added to the
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// list of groups that we query later, if this is different from
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// the Owner Sid (which is now in sda_UserSid).
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Status = NtQueryInformationToken(pSda->sda_UserToken,
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TokenUser,
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pSidnAttr,
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sizeof(Buffer),
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&SizeNeeded);
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ASSERT (NT_SUCCESS(Status));
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if (!NT_SUCCESS(Status))
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{
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break;
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}
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AfpDumpSid("AfpGetUserAndPrimaryGroupSids: LOGON User Sid", pSidnAttr->Sid);
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// Get the list of groups this user is member of
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SizeNeeded = sizeof(GrpsBuffer);
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do
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{
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if (Status != STATUS_SUCCESS)
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{
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if (pGroups != (PTOKEN_GROUPS)GrpsBuffer)
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AfpFreeMemory(pGroups);
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if ((pGroups = (PTOKEN_GROUPS)ALLOC_ACCESS_MEM(SizeNeeded)) == NULL)
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{
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Status = AFP_ERR_MISC;
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if (pSda->sda_ClientType == SDA_CLIENT_ADMIN)
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{
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Status = STATUS_INSUFFICIENT_RESOURCES;
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}
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break;
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}
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}
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Status = NtQueryInformationToken(pSda->sda_UserToken,
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TokenGroups,
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pGroups,
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SizeNeeded,
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&SizeNeeded);
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} while ((Status != STATUS_SUCCESS) &&
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((Status == STATUS_BUFFER_TOO_SMALL) ||
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(Status == STATUS_BUFFER_OVERFLOW) ||
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(Status == STATUS_MORE_ENTRIES)));
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if (!NT_SUCCESS(Status))
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{
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AFPLOG_ERROR(AFPSRVMSG_USER_GROUPS, Status, NULL, 0, NULL);
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break;
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}
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// Allocate enough memory to copy the group information in the sda. If
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// the User and Owner Sids in the user token are not the same then we
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// want to add the user sid to the list of groups. This is especially
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// the case where an ADMIN logs on but his Owner Sid is Administrators.
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// Also fix up the pointers appropriately !!!
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ExtraSpace = 0; Offset = 0; j = 0;
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if (!RtlEqualSid(pSidnAttr->Sid, pSda->sda_UserSid))
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{
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ExtraSpace = (RtlLengthSid(pSidnAttr->Sid) + sizeof(pSidnAttr->Attributes));
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Offset = sizeof(SID_AND_ATTRIBUTES);
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j = 1;
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}
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if ((pSda->sda_pGroups = (PTOKEN_GROUPS)AfpAllocPagedMemory(2*SizeNeeded+2*ExtraSpace)) == NULL)
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{
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Status = STATUS_INSUFFICIENT_RESOURCES;
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break;
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}
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// If we are not copying the User Sid in sda_pGroups, then copy pGroups to sda_pGroups
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// directly and then fixup the individual pSid pointers. If we are then make the User
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// Sid as the first one in the list and copy the actual sid at the tail end of the
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// buffer.
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pSda->sda_pGroups->GroupCount = pGroups->GroupCount;
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RtlCopyMemory(&pSda->sda_pGroups->Groups[j],
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&pGroups->Groups[0],
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SizeNeeded - sizeof(DWORD)); // DWORD accounts for GroupCount
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if (ExtraSpace > 0)
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{
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pSda->sda_pGroups->Groups[0].Sid = (PSID)((PBYTE)(pSda->sda_pGroups) + SizeNeeded);
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RtlCopyMemory(pSda->sda_pGroups->Groups[0].Sid,
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pSidnAttr->Sid,
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RtlLengthSid(pSidnAttr->Sid));
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pSda->sda_pGroups->Groups[0].Attributes = pSidnAttr->Attributes;
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pSda->sda_pGroups->GroupCount ++;
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AfpDumpSid("AfpGetUserAndPrimaryGroupSids: Member of ",
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pSda->sda_pGroups->Groups[0].Sid);
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}
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for (i = 0; i < pGroups->GroupCount; i++, j++)
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{
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pSda->sda_pGroups->Groups[j].Sid = (PSID)((PBYTE)(pGroups->Groups[i].Sid) -
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(PBYTE)pGroups +
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(PBYTE)(pSda->sda_pGroups) +
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Offset);
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AfpDumpSid("AfpGetUserAndPrimaryGroupSids: Member of ",
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pSda->sda_pGroups->Groups[j].Sid);
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DBGPRINT(DBG_COMP_SECURITY, DBG_LEVEL_INFO,
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("AfpGetUserAndPrimaryGroupSids: Attributes %lx\n",
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pSda->sda_pGroups->Groups[j].Attributes));
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}
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} while (False);
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if (pGroups != (PTOKEN_GROUPS)GrpsBuffer)
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AfpFreeMemory(pGroups);
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return Status;
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}
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/*** AfpMakeSecurityDescriptorForUser
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*
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* Create a security descriptor for a user. The security descriptor has the
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* Owner Sid, Primary Group Sid and Aces for the User alone.
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*/
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AFPSTATUS
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AfpMakeSecurityDescriptorForUser(
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IN PSID OwnerSid,
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IN PSID GroupSid,
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OUT PISECURITY_DESCRIPTOR * ppSecDesc
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)
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{
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AFPSTATUS Status = AFP_ERR_MISC;
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PISECURITY_DESCRIPTOR pSecDesc;
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int DaclSize;
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PACCESS_ALLOWED_ACE pAce;
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PAGED_CODE( );
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DBGPRINT(DBG_COMP_SECURITY, DBG_LEVEL_INFO,
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("AfpMakeSecurityDescriptorForUser: Entered\n"));
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do
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{
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// Allocate a security descriptor
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pSecDesc = (PISECURITY_DESCRIPTOR)ALLOC_ACCESS_MEM(sizeof(SECURITY_DESCRIPTOR));
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*ppSecDesc = pSecDesc;
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if (pSecDesc == NULL)
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break;
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// Initialize the security descriptor
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RtlCreateSecurityDescriptor(pSecDesc, SECURITY_DESCRIPTOR_REVISION);
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pSecDesc->Control = SE_DACL_PRESENT;
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// Set the owner and group Ids in the descriptor
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pSecDesc->Owner = OwnerSid;
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pSecDesc->Group = GroupSid;
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// Determine the size of the Dacl needed. The sizeof(DWORD) offsets the
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// SidStart field in the ACE. There are 7 aces in this security descriptor:
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//
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// 2 for the owner (owner+inherit for owner)
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// 2 for Administrators (one inherit)
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// 2 for world (1 for world and 1 inherit for world).
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// 2 for system
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DaclSize = sizeof(ACL) + 2*(sizeof(ACCESS_ALLOWED_ACE) - sizeof(DWORD) +
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RtlLengthSid(OwnerSid)) +
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2*(sizeof(ACCESS_ALLOWED_ACE) - sizeof(DWORD) +
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sizeof(AfpSidWorld)) +
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2*(sizeof(ACCESS_ALLOWED_ACE) - sizeof(DWORD) +
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AfpSizeSidAdmins) +
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2*(sizeof(ACCESS_ALLOWED_ACE) - sizeof(DWORD) +
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RtlLengthSid(&AfpSidSystem));
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if ((pSecDesc->Dacl = (PACL)ALLOC_ACCESS_MEM(DaclSize)) == NULL)
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break;
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// Initialize the ACL with one ACE corres. to Owner getting all the
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// privileges. Add another ace which is identical to the first ace but is
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// a inheritance ACE.
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// JH - Add another ace for world with minumum permissions and for administrators
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// with FullControl
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RtlCreateAcl(pSecDesc->Dacl, DaclSize, ACL_REVISION);
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// we will be adding to this as we add aces, so set it to the min here
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pSecDesc->Dacl->AclSize = sizeof(ACL);
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pAce = (PACCESS_ALLOWED_ACE)((PBYTE)pSecDesc->Dacl + sizeof(ACL));
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// Add the ALLOWED_ACE and the corres. inherit Ace for owner
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pAce = afpAddAceToAcl(pSecDesc->Dacl,
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pAce,
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(AFP_READ_ACCESS | AFP_WRITE_ACCESS | AFP_OWNER_ACCESS | FILE_DELETE_CHILD),
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OwnerSid,
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True);
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if (AfpSidAdmins != NULL)
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{
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// Add the ALLOWED_ACE and the corres. inherit Ace for 'Administrators'
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pAce = afpAddAceToAcl(pSecDesc->Dacl,
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pAce,
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(AFP_READ_ACCESS | AFP_WRITE_ACCESS | AFP_OWNER_ACCESS | FILE_DELETE_CHILD),
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AfpSidAdmins,
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True);
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}
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// Add a min. permission ace for world, but only if the owner is
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// not world already
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if (!RtlEqualSid(OwnerSid, &AfpSidWorld))
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{
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pAce = afpAddAceToAcl(pSecDesc->Dacl,
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pAce,
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(AFP_MIN_ACCESS),
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&AfpSidWorld,
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True);
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}
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// Now add Aces for System
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pAce = afpAddAceToAcl(pSecDesc->Dacl,
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pAce,
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AFP_READ_ACCESS | AFP_WRITE_ACCESS | AFP_OWNER_ACCESS,
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&AfpSidSystem,
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True);
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Status = AFP_ERR_NONE;
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} while (False);
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// Do any cleanup on error
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if (!NT_SUCCESS(Status) && (pSecDesc != NULL))
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{
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if (pSecDesc->Dacl != NULL)
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AfpFreeMemory(pSecDesc->Dacl);
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AfpFreeMemory(pSecDesc);
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}
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return Status;
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}
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/*** AfpGetAfpPermissions
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*
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* Read the security descriptor for this directory and obtain the SIDs for
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* Owner and Primary group. Determine if this user is a member of the directory
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* primary group. Finally obtain Owner,Group and World permissions.
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*
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* OwnerId, GroupId and permissions will always be valid if this call succeeds.
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*/
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NTSTATUS
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AfpGetAfpPermissions(
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IN PSDA pSda,
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IN HANDLE DirHandle,
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IN OUT PFILEDIRPARM pFDParm
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)
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{
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NTSTATUS Status = STATUS_SUCCESS;
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DWORD SizeNeeded;
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PISECURITY_DESCRIPTOR pSecDesc = NULL;
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PBYTE pAbsSecDesc = NULL; // Used in conversion of
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// sec descriptor to
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// absolute format
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BOOLEAN SawOwnerAce = False,
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SawGroupAce = False,
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SawWorldAce = False,
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SawDenyAceForUser = False,
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CheckUserRights;
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#ifdef PROFILING
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TIME TimeS, TimeE, TimeD;
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#endif
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PAGED_CODE( );
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#ifdef PROFILING
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INTERLOCKED_INCREMENT_LONG(&AfpServerProfile->perf_GetPermsCount);
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AfpGetPerfCounter(&TimeS);
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#endif
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// Read the security descriptor for this directory and determine the
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// rights for owner/group/world.We want to optimize on how much memory
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// we need to read this in. Its a pain to make a call just to get that.
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// So just make a guess. If that turns out to be short then do the exact
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// allocation.
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do
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{
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// 4096 has been emperically chosen
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SizeNeeded = 4096 - POOL_OVERHEAD;
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do
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{
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if (pSecDesc != NULL)
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{
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AfpFreeMemory(pSecDesc);
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}
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if ((pSecDesc = (PSECURITY_DESCRIPTOR)ALLOC_ACCESS_MEM(SizeNeeded)) == NULL)
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{
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Status = AFP_ERR_MISC;
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if (pSda->sda_ClientType == SDA_CLIENT_ADMIN)
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{
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Status = STATUS_INSUFFICIENT_RESOURCES;
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}
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break;
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}
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Status = NtQuerySecurityObject(DirHandle,
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OWNER_SECURITY_INFORMATION |
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GROUP_SECURITY_INFORMATION |
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DACL_SECURITY_INFORMATION,
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pSecDesc,
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SizeNeeded,
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&SizeNeeded);
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} while ((Status != STATUS_SUCCESS) &&
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((Status == STATUS_BUFFER_TOO_SMALL) ||
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(Status == STATUS_BUFFER_OVERFLOW) ||
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(Status == STATUS_MORE_ENTRIES)));
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if (!NT_SUCCESS(Status))
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{
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break;
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}
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// If the security descriptor is in self-relative form, convert to absolute
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pSecDesc = (PISECURITY_DESCRIPTOR)((PBYTE)pSecDesc);
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if (pSecDesc->Control & SE_SELF_RELATIVE)
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{
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DWORD AbsoluteSizeNeeded;
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// An absolute SD is not necessarily the same size as a relative
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// SD, so an in-place conversion may not be possible.
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AbsoluteSizeNeeded = SizeNeeded;
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Status = RtlSelfRelativeToAbsoluteSD2(pSecDesc, &AbsoluteSizeNeeded);
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if (Status == STATUS_BUFFER_TOO_SMALL)
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{
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// Allocate a new buffer in which to store the absolute
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// security descriptor, copy the contents of the relative
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// descriptor in and try again
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pAbsSecDesc = (PBYTE)ALLOC_ACCESS_MEM(AbsoluteSizeNeeded);
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if (pAbsSecDesc == NULL)
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{
|
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Status = STATUS_NO_MEMORY;
|
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DBGPRINT(DBG_COMP_SECURITY, DBG_LEVEL_ERR,
|
|
("AfpGetAfpPermissions: LocalAlloc error\n"));
|
|
}
|
|
else
|
|
{
|
|
RtlCopyMemory(pAbsSecDesc, pSecDesc, SizeNeeded);
|
|
Status = RtlSelfRelativeToAbsoluteSD2 (pAbsSecDesc,
|
|
&AbsoluteSizeNeeded);
|
|
if (NT_SUCCESS(Status))
|
|
{
|
|
// We don't need relative form anymore,
|
|
// we will work with the Absolute form
|
|
if (pSecDesc != NULL)
|
|
{
|
|
AfpFreeMemory(pSecDesc);
|
|
}
|
|
pSecDesc = (PISECURITY_DESCRIPTOR)pAbsSecDesc;
|
|
}
|
|
else
|
|
{
|
|
// We cannot use Absolute Form, throw it away
|
|
AfpFreeMemory(pAbsSecDesc);
|
|
pAbsSecDesc = NULL;
|
|
}
|
|
}
|
|
|
|
}
|
|
if (!NT_SUCCESS(Status))
|
|
{
|
|
DBGPRINT(DBG_COMP_SECURITY, DBG_LEVEL_ERR,
|
|
("AfpGetAfpPermissions: RtlSelfRelativeToAbsoluteSD2: returned error %lx\n", Status));
|
|
break;
|
|
}
|
|
}
|
|
|
|
// Now determine if the user is a member of the directories primary group.
|
|
pFDParm->_fdp_OwnerId = 0;
|
|
pFDParm->_fdp_GroupId = 0;
|
|
pFDParm->_fdp_UserIsOwner = False;
|
|
pFDParm->_fdp_UserIsMemberOfDirGroup = False;
|
|
|
|
if (pSecDesc->Owner != NULL)
|
|
{
|
|
AfpDumpSid("AfpGetAfpPermissions: OwnerSid", pSecDesc->Owner);
|
|
|
|
pFDParm->_fdp_UserIsOwner =
|
|
(RtlEqualSid(pSecDesc->Owner, pSda->sda_UserSid) ||
|
|
((pSda->sda_ClientType != SDA_CLIENT_GUEST) &&
|
|
(pSda->sda_ClientType != SDA_CLIENT_ADMIN) &&
|
|
afpIsUserMemberOfGroup(pSda->sda_pGroups,
|
|
pSecDesc->Owner)));
|
|
DBGPRINT(DBG_COMP_SECURITY, DBG_LEVEL_INFO,
|
|
("AfpGetAfpPermissions: User %s Owner\n",
|
|
pFDParm->_fdp_UserIsOwner ? "is" : "isnt"));
|
|
|
|
if (!NT_SUCCESS(Status = AfpSidToMacId(pSecDesc->Owner,
|
|
&pFDParm->_fdp_OwnerId)))
|
|
{
|
|
// If we cant map the Sid, return Id SE_NULL_POSIX_ID
|
|
pFDParm->_fdp_OwnerId = SE_NULL_POSIX_ID;
|
|
Status = AFP_ERR_NONE;
|
|
}
|
|
}
|
|
|
|
if (pSecDesc->Group != NULL)
|
|
{
|
|
AfpDumpSid("AfpGetAfpPermissions: GroupSid", pSecDesc->Group);
|
|
|
|
if (!pFDParm->_fdp_UserIsOwner)
|
|
pFDParm->_fdp_UserIsMemberOfDirGroup =
|
|
(RtlEqualSid(pSecDesc->Group, pSda->sda_UserSid) ||
|
|
((pSda->sda_ClientType != SDA_CLIENT_GUEST) &&
|
|
(pSda->sda_ClientType != SDA_CLIENT_ADMIN) &&
|
|
afpIsUserMemberOfGroup(pSda->sda_pGroups,
|
|
pSecDesc->Group)));
|
|
|
|
DBGPRINT(DBG_COMP_SECURITY, DBG_LEVEL_INFO,
|
|
("AfpGetAfpPermissions: User %s member of PrimaryGroup\n",
|
|
pFDParm->_fdp_UserIsMemberOfDirGroup ? "is" : "isnt"));
|
|
|
|
if (!NT_SUCCESS(Status = AfpSidToMacId(pSecDesc->Group,
|
|
&pFDParm->_fdp_GroupId)))
|
|
{
|
|
// If we cant map the Sid, return Id SE_NULL_POSIX_ID
|
|
pFDParm->_fdp_GroupId = SE_NULL_POSIX_ID;
|
|
Status = AFP_ERR_NONE;
|
|
}
|
|
}
|
|
|
|
// Walk through the ACL list and determine Owner/Group/World and User
|
|
// permissions. For Owner/Group and User, if the specific ace's are
|
|
// not present then they inherit the world permissions.
|
|
//
|
|
// A NULL Acl => All rights to everyone. An empty Acl on the other
|
|
// hand => no access for anyone.
|
|
|
|
pFDParm->_fdp_UserRights = 0;
|
|
pFDParm->_fdp_WorldRights = 0;
|
|
|
|
if ((pSecDesc->Control & SE_DACL_PRESENT) &&
|
|
(pSecDesc->Dacl != NULL))
|
|
{
|
|
USHORT i;
|
|
PSID pSid;
|
|
PACL pAcl;
|
|
PACCESS_ALLOWED_ACE pAce;
|
|
|
|
ASSERT (pSecDesc->Dacl != NULL);
|
|
pAcl = pSecDesc->Dacl;
|
|
pAce = (PACCESS_ALLOWED_ACE)((PBYTE)pAcl + sizeof(ACL));
|
|
CheckUserRights = ((pSda->sda_ClientType != SDA_CLIENT_GUEST) &&
|
|
(pSda->sda_ClientType != SDA_CLIENT_ADMIN));
|
|
DBGPRINT(DBG_COMP_SECURITY, DBG_LEVEL_INFO,
|
|
("AfpGetAfpPermissions: # of aces %d\n", pSecDesc->Dacl->AceCount));
|
|
for (i = 0; i < pSecDesc->Dacl->AceCount; i++)
|
|
{
|
|
pSid = (PSID)(&pAce->SidStart);
|
|
|
|
// Ignore inherit aces, Aces for CreatorOwner, CreatorGroup & system
|
|
if ((pAce->Header.AceFlags & INHERIT_ONLY_ACE) ||
|
|
RtlEqualSid(pSid, &AfpSidSystem))
|
|
{
|
|
AfpDumpSidnMask("AfpGetAfpPermissions: Skipping",
|
|
pSid,
|
|
pAce->Mask,
|
|
pAce->Header.AceType,
|
|
pAce->Header.AceFlags);
|
|
}
|
|
else
|
|
{
|
|
AfpDumpSidnMask("AfpGetAfpPermissions: ACE",
|
|
pSid,
|
|
pAce->Mask,
|
|
pAce->Header.AceType,
|
|
pAce->Header.AceFlags);
|
|
|
|
if (!SawOwnerAce &&
|
|
(pSecDesc->Owner != NULL) &&
|
|
RtlEqualSid(pSid, pSecDesc->Owner))
|
|
{
|
|
AfpAccessMask2AfpPermissions(pFDParm->_fdp_OwnerRights,
|
|
pAce->Mask,
|
|
pAce->Header.AceType);
|
|
DBGPRINT(DBG_COMP_SECURITY, DBG_LEVEL_INFO,
|
|
("%s Ace Mask %lx, Owner Permission: %x\n",
|
|
(pAce->Header.AceType == ACCESS_ALLOWED_ACE_TYPE) ?
|
|
"Allow" : "Deny",
|
|
pAce->Mask, pFDParm->_fdp_OwnerRights));
|
|
SawOwnerAce = True;
|
|
}
|
|
|
|
if (!SawGroupAce &&
|
|
(pSecDesc->Group != NULL) &&
|
|
RtlEqualSid(pSid, pSecDesc->Group))
|
|
{
|
|
AfpAccessMask2AfpPermissions(pFDParm->_fdp_GroupRights,
|
|
pAce->Mask,
|
|
pAce->Header.AceType);
|
|
DBGPRINT(DBG_COMP_SECURITY, DBG_LEVEL_INFO,
|
|
("%s Ace Mask %lx, Group Permission: %x\n",
|
|
(pAce->Header.AceType == ACCESS_ALLOWED_ACE_TYPE) ?
|
|
"Allow" : "Deny",
|
|
pAce->Mask, pFDParm->_fdp_GroupRights));
|
|
SawGroupAce = True;
|
|
}
|
|
|
|
if (!SawWorldAce &&
|
|
RtlEqualSid(pSid, (PSID)&AfpSidWorld))
|
|
{
|
|
AfpAccessMask2AfpPermissions(pFDParm->_fdp_WorldRights,
|
|
pAce->Mask,
|
|
pAce->Header.AceType);
|
|
DBGPRINT(DBG_COMP_SECURITY, DBG_LEVEL_INFO,
|
|
("%s Ace Mask %lx, World Permission: %x\n",
|
|
(pAce->Header.AceType == ACCESS_ALLOWED_ACE_TYPE) ?
|
|
"Allow" : "Deny",
|
|
pAce->Mask, pFDParm->_fdp_WorldRights));
|
|
SawWorldAce = True;
|
|
}
|
|
|
|
if (CheckUserRights &&
|
|
!SawDenyAceForUser &&
|
|
(RtlEqualSid(pSid, pSda->sda_UserSid) ||
|
|
afpIsUserMemberOfGroup(pSda->sda_pGroups, pSid)))
|
|
{
|
|
BYTE UserRights;
|
|
|
|
UserRights = 0;
|
|
AfpAccessMask2AfpPermissions(UserRights,
|
|
pAce->Mask,
|
|
ACCESS_ALLOWED_ACE_TYPE);
|
|
|
|
DBGPRINT(DBG_COMP_SECURITY, DBG_LEVEL_INFO,
|
|
("%s Ace Mask %lx, User Permission: %x\n",
|
|
(pAce->Header.AceType == ACCESS_ALLOWED_ACE_TYPE) ?
|
|
"Allow" : "Deny",
|
|
pAce->Mask, pFDParm->_fdp_WorldRights));
|
|
|
|
if (pAce->Header.AceType == ACCESS_ALLOWED_ACE_TYPE)
|
|
{
|
|
pFDParm->_fdp_UserRights |= UserRights;
|
|
}
|
|
else
|
|
{
|
|
SawDenyAceForUser = True;
|
|
pFDParm->_fdp_UserRights &= ~UserRights;
|
|
}
|
|
}
|
|
}
|
|
|
|
pAce = (PACCESS_ALLOWED_ACE)((PBYTE)pAce + pAce->Header.AceSize);
|
|
}
|
|
}
|
|
else // Security descriptor not present, party time
|
|
{
|
|
pFDParm->_fdp_WorldRights = DIR_ACCESS_ALL;
|
|
pFDParm->_fdp_UserRights = DIR_ACCESS_ALL | DIR_ACCESS_OWNER;
|
|
}
|
|
|
|
if (!SawGroupAce)
|
|
pFDParm->_fdp_GroupRights = pFDParm->_fdp_WorldRights;
|
|
|
|
// If this is a standalone server and the primary group of the
|
|
// directory is MACHINE\None, do not return this information to
|
|
// the caller.
|
|
if (AfpServerIsStandalone &&
|
|
(pSecDesc->Group != NULL) &&
|
|
RtlEqualSid(pSecDesc->Group, AfpSidNone))
|
|
{
|
|
pFDParm->_fdp_GroupRights = 0;
|
|
pFDParm->_fdp_GroupId = 0;
|
|
}
|
|
|
|
if (pSda->sda_ClientType == SDA_CLIENT_GUEST)
|
|
pFDParm->_fdp_UserRights = pFDParm->_fdp_WorldRights;
|
|
|
|
// Make sure we do not give a user anything if we saw a deny ace for him.
|
|
if (!SawOwnerAce && !SawDenyAceForUser)
|
|
pFDParm->_fdp_OwnerRights = pFDParm->_fdp_WorldRights;
|
|
} while (False);
|
|
|
|
if (pSecDesc != NULL)
|
|
AfpFreeMemory(pSecDesc);
|
|
|
|
#ifdef PROFILING
|
|
AfpGetPerfCounter(&TimeE);
|
|
TimeD.QuadPart = TimeE.QuadPart - TimeS.QuadPart;
|
|
INTERLOCKED_ADD_LARGE_INTGR(&AfpServerProfile->perf_GetPermsTime,
|
|
TimeD,
|
|
&AfpStatisticsLock);
|
|
#endif
|
|
return Status;
|
|
}
|
|
|
|
|
|
|
|
/*** afpMoveAces
|
|
*
|
|
* Move a bunch of aces from the old security descriptor to the new security
|
|
* descriptor.
|
|
*/
|
|
LOCAL PACCESS_ALLOWED_ACE
|
|
afpMoveAces(
|
|
IN PACL pOldDacl,
|
|
IN PACCESS_ALLOWED_ACE pAceStart,
|
|
IN PSID pSidOldOwner,
|
|
IN PSID pSidNewOwner,
|
|
IN PSID pSidOldGroup,
|
|
IN PSID pSidNewGroup,
|
|
IN BOOLEAN DenyAces,
|
|
IN OUT PACL pNewDacl
|
|
)
|
|
{
|
|
USHORT i;
|
|
PACCESS_ALLOWED_ACE pAceOld;
|
|
PSID pSidAce;
|
|
|
|
PAGED_CODE( );
|
|
|
|
for (i = 0, pAceOld = (PACCESS_ALLOWED_ACE)((PBYTE)pOldDacl + sizeof(ACL));
|
|
i < pOldDacl->AceCount;
|
|
i++, pAceOld = (PACCESS_ALLOWED_ACE)((PBYTE)pAceOld + pAceOld->Header.AceSize))
|
|
{
|
|
// Note: All deny aces are ahead of the grant aces.
|
|
if (DenyAces && (pAceOld->Header.AceType != ACCESS_DENIED_ACE_TYPE))
|
|
break;
|
|
|
|
if (!DenyAces && (pAceOld->Header.AceType == ACCESS_DENIED_ACE_TYPE))
|
|
continue;
|
|
|
|
pSidAce = (PSID)(&pAceOld->SidStart);
|
|
if (!RtlEqualSid(pSidAce, &AfpSidWorld) &&
|
|
!RtlEqualSid(pSidAce, &AfpSidSystem) &&
|
|
(AfpSidAdmins != NULL) &&
|
|
!RtlEqualSid(pSidAce, AfpSidAdmins) &&
|
|
!RtlEqualSid(pSidAce, pSidOldOwner) &&
|
|
!RtlEqualSid(pSidAce, pSidNewOwner) &&
|
|
!RtlEqualSid(pSidAce, pSidOldGroup) &&
|
|
!RtlEqualSid(pSidAce, pSidNewGroup))
|
|
{
|
|
RtlCopyMemory(pAceStart, pAceOld, pAceOld->Header.AceSize);
|
|
pNewDacl->AclSize += pAceOld->Header.AceSize;
|
|
pNewDacl->AceCount ++;
|
|
pAceStart = (PACCESS_ALLOWED_ACE)((PBYTE)pAceStart +
|
|
pAceStart->Header.AceSize);
|
|
}
|
|
}
|
|
return pAceStart;
|
|
}
|
|
|
|
|
|
/*** AfpSetAfpPermissions
|
|
*
|
|
* Set the permissions on this directory. Also optionally set the owner and
|
|
* group ids. For setting the owner and group ids verify if the user has the
|
|
* needed access. This access is however not good enough. We check for this
|
|
* access but do the actual setting of the permissions in the special server
|
|
* context (RESTORE privilege is needed).
|
|
*/
|
|
AFPSTATUS
|
|
AfpSetAfpPermissions(
|
|
IN HANDLE DirHandle,
|
|
IN DWORD Bitmap,
|
|
IN PFILEDIRPARM pFDParm
|
|
)
|
|
{
|
|
AFPSTATUS Status = STATUS_SUCCESS;
|
|
DWORD SizeNeeded;
|
|
PISECURITY_DESCRIPTOR pSecDesc;
|
|
PBYTE pAbsSecDesc = NULL; // Used in conversion of
|
|
// sec descriptor to
|
|
// absolute format
|
|
SECURITY_INFORMATION SecInfo = DACL_SECURITY_INFORMATION;
|
|
PSID pSidOwner = NULL, pSidGroup = NULL;
|
|
PSID pSidOldOwner, pSidOldGroup;
|
|
BOOLEAN SawOwnerAce = False, SawGroupAce = False;
|
|
BOOLEAN OwnerIsWorld = False, GroupIsWorld = False;
|
|
BOOLEAN fDir = IsDir(pFDParm);
|
|
PACL pDaclNew = NULL;
|
|
PACCESS_ALLOWED_ACE pAce;
|
|
LONG SizeNewDacl;
|
|
#ifdef PROFILING
|
|
TIME TimeS, TimeE, TimeD;
|
|
#endif
|
|
|
|
PAGED_CODE( );
|
|
|
|
#ifdef PROFILING
|
|
INTERLOCKED_INCREMENT_LONG(&AfpServerProfile->perf_SetPermsCount);
|
|
AfpGetPerfCounter(&TimeS);
|
|
#endif
|
|
do
|
|
{
|
|
// Read the security descriptor for this directory
|
|
SizeNeeded = 4096 - POOL_OVERHEAD;
|
|
pSecDesc = NULL;
|
|
|
|
do
|
|
{
|
|
if (pSecDesc != NULL)
|
|
{
|
|
AfpFreeMemory(pSecDesc);
|
|
}
|
|
|
|
SizeNewDacl = SizeNeeded;
|
|
if ((pSecDesc = (PSECURITY_DESCRIPTOR)ALLOC_ACCESS_MEM(SizeNeeded)) == NULL)
|
|
{
|
|
Status = AFP_ERR_MISC;
|
|
break;
|
|
}
|
|
|
|
Status = NtQuerySecurityObject(DirHandle,
|
|
OWNER_SECURITY_INFORMATION |
|
|
GROUP_SECURITY_INFORMATION |
|
|
DACL_SECURITY_INFORMATION,
|
|
pSecDesc,
|
|
SizeNeeded,
|
|
&SizeNeeded);
|
|
} while ((Status != STATUS_SUCCESS) &&
|
|
((Status == STATUS_BUFFER_TOO_SMALL) ||
|
|
(Status == STATUS_BUFFER_OVERFLOW) ||
|
|
(Status == STATUS_MORE_ENTRIES)));
|
|
|
|
if (!NT_SUCCESS(Status))
|
|
{
|
|
Status = AfpIoConvertNTStatusToAfpStatus(Status);
|
|
break;
|
|
}
|
|
|
|
|
|
pSecDesc = (PISECURITY_DESCRIPTOR)((PBYTE)pSecDesc);
|
|
// If the security descriptor is in self-relative form, convert to absolute
|
|
if (pSecDesc->Control & SE_SELF_RELATIVE)
|
|
{
|
|
DWORD AbsoluteSizeNeeded;
|
|
|
|
// An absolute SD is not necessarily the same size as a relative
|
|
// SD, so an in-place conversion may not be possible.
|
|
|
|
AbsoluteSizeNeeded = SizeNeeded;
|
|
Status = RtlSelfRelativeToAbsoluteSD2(pSecDesc, &AbsoluteSizeNeeded);
|
|
if (Status == STATUS_BUFFER_TOO_SMALL)
|
|
{
|
|
// Allocate a new buffer in which to store the absolute
|
|
// security descriptor, copy the contents of the relative
|
|
// descriptor in and try again
|
|
|
|
pAbsSecDesc = (PBYTE)ALLOC_ACCESS_MEM(AbsoluteSizeNeeded);
|
|
if (pAbsSecDesc == NULL)
|
|
{
|
|
Status = STATUS_NO_MEMORY;
|
|
DBGPRINT(DBG_COMP_SECURITY, DBG_LEVEL_ERR,
|
|
("AfpSetAfpPermissions: LocalAlloc error\n"));
|
|
}
|
|
else
|
|
{
|
|
RtlCopyMemory(pAbsSecDesc, pSecDesc, SizeNeeded);
|
|
Status = RtlSelfRelativeToAbsoluteSD2 (pAbsSecDesc,
|
|
&AbsoluteSizeNeeded);
|
|
if (NT_SUCCESS(Status))
|
|
{
|
|
// We don't need relative form anymore,
|
|
// we will work with the Absolute form
|
|
if (pSecDesc != NULL)
|
|
{
|
|
AfpFreeMemory(pSecDesc);
|
|
}
|
|
pSecDesc = (PISECURITY_DESCRIPTOR)pAbsSecDesc;
|
|
}
|
|
else
|
|
{
|
|
// We cannot use Absolute Form, throw it away
|
|
AfpFreeMemory(pAbsSecDesc);
|
|
pAbsSecDesc = NULL;
|
|
}
|
|
}
|
|
}
|
|
|
|
if (!NT_SUCCESS(Status))
|
|
{
|
|
DBGPRINT(DBG_COMP_SECURITY, DBG_LEVEL_ERR,
|
|
("AfpSetAfpPermissions: RtlSelfRelativeToAbsoluteSD2: returned error %lx\n", Status));
|
|
break;
|
|
}
|
|
SizeNeeded = AbsoluteSizeNeeded;
|
|
}
|
|
SizeNewDacl = SizeNeeded;
|
|
|
|
// Save the old Owner and Group Sids
|
|
pSidOldOwner = pSecDesc->Owner;
|
|
pSidOldGroup = pSecDesc->Group;
|
|
|
|
// Convert the owner/group ids, if any to be set to their corres. sids
|
|
if (Bitmap & DIR_BITMAP_OWNERID)
|
|
{
|
|
DBGPRINT(DBG_COMP_SECURITY, DBG_LEVEL_INFO,
|
|
("AfpSetAfpPermissions: Setting Owner to ID %lx\n",
|
|
pFDParm->_fdp_OwnerId));
|
|
|
|
if (AfpMacIdToSid(pFDParm->_fdp_OwnerId, &pSidOwner) != STATUS_SUCCESS)
|
|
{
|
|
Status = AFP_ERR_MISC;
|
|
break;
|
|
}
|
|
|
|
// Don't allow owner sid to be set as the NULL sid, or
|
|
// to what it is presently set to
|
|
if (!RtlEqualSid(pSecDesc->Owner, pSidOwner) &&
|
|
!RtlEqualSid(&AfpSidNull, pSidOwner))
|
|
{
|
|
AfpDumpSid("AfpSetAfpPermissions: Setting Owner Sid to ", pSidOwner);
|
|
pSecDesc->Owner = pSidOwner;
|
|
SecInfo |= OWNER_SECURITY_INFORMATION;
|
|
}
|
|
}
|
|
|
|
if (Bitmap & DIR_BITMAP_GROUPID)
|
|
{
|
|
DBGPRINT(DBG_COMP_SECURITY, DBG_LEVEL_INFO,
|
|
("AfpSetAfpPermissions: Setting Group to ID %lx\n",
|
|
pFDParm->_fdp_GroupId));
|
|
|
|
if (AfpMacIdToSid(pFDParm->_fdp_GroupId, &pSidGroup) != STATUS_SUCCESS)
|
|
{
|
|
Status = AFP_ERR_MISC;
|
|
break;
|
|
}
|
|
|
|
// Don't allow group sid to be set as the NULL or None sid, or
|
|
// to what it is presently set to
|
|
if (!RtlEqualSid(pSecDesc->Group, pSidGroup) &&
|
|
!RtlEqualSid(&AfpSidNull, pSidGroup) &&
|
|
(!AfpServerIsStandalone || !RtlEqualSid(AfpSidNone, pSidGroup)))
|
|
{
|
|
AfpDumpSid("AfpSetAfpPermissions: Setting Group Sid to ", pSidGroup);
|
|
pSecDesc->Group = pSidGroup;
|
|
SecInfo |= GROUP_SECURITY_INFORMATION;
|
|
}
|
|
|
|
}
|
|
|
|
// If either the owner or group or both is 'EveryOne' then coalesce the
|
|
// permissions
|
|
if (RtlEqualSid(pSecDesc->Owner, pSecDesc->Group))
|
|
{
|
|
pFDParm->_fdp_OwnerRights |= pFDParm->_fdp_GroupRights;
|
|
pFDParm->_fdp_GroupRights |= pFDParm->_fdp_OwnerRights;
|
|
}
|
|
|
|
if (RtlEqualSid(pSecDesc->Owner, &AfpSidWorld))
|
|
{
|
|
pFDParm->_fdp_WorldRights |= (pFDParm->_fdp_OwnerRights | DIR_ACCESS_OWNER);
|
|
OwnerIsWorld = True;
|
|
}
|
|
|
|
if (RtlEqualSid(pSecDesc->Group, &AfpSidWorld))
|
|
{
|
|
pFDParm->_fdp_WorldRights |= pFDParm->_fdp_GroupRights;
|
|
GroupIsWorld = True;
|
|
}
|
|
|
|
// Construct the new Dacl. This consists of Aces for World, Owner and Group
|
|
// followed by Old Aces for everybody else, but with Aces for World, OldOwner
|
|
// and OldGroup stripped out. First determine space for the new Dacl and
|
|
// allocated space for the new Dacl. Lets be exteremely conservative. We
|
|
// have two aces each for owner/group/world.
|
|
//
|
|
// JH - Add aces for DomainAdmins too.
|
|
|
|
SizeNewDacl +=
|
|
(RtlLengthSid(pSecDesc->Owner) + sizeof(ACCESS_ALLOWED_ACE) +
|
|
RtlLengthSid(pSecDesc->Group) + sizeof(ACCESS_ALLOWED_ACE) +
|
|
AfpSizeSidAdmins + sizeof(ACCESS_ALLOWED_ACE) +
|
|
sizeof(AfpSidSystem) + sizeof(ACCESS_ALLOWED_ACE) +
|
|
sizeof(AfpSidWorld) + sizeof(ACCESS_ALLOWED_ACE)) * 3;
|
|
|
|
if ((pDaclNew = (PACL)ALLOC_ACCESS_MEM(SizeNewDacl)) == NULL)
|
|
{
|
|
Status = AFP_ERR_MISC;
|
|
break;
|
|
}
|
|
|
|
RtlCreateAcl(pDaclNew, SizeNewDacl, ACL_REVISION);
|
|
|
|
// we will be adding to this as we add aces, so set it to the min here
|
|
pDaclNew->AclSize = sizeof(ACL);
|
|
|
|
pAce = (PACCESS_ALLOWED_ACE)((PBYTE)pDaclNew + sizeof(ACL));
|
|
|
|
// At this time the Acl list is empty, i.e. no access for anybody
|
|
// Start off by copying the Deny Aces from the original Dacl list
|
|
// weeding out the Aces for World, old and new owner, new and old
|
|
// group, creator owner and creator group
|
|
if (pSecDesc->Dacl != NULL)
|
|
{
|
|
pAce = afpMoveAces(pSecDesc->Dacl,
|
|
pAce,
|
|
pSidOldOwner,
|
|
pSecDesc->Owner,
|
|
pSidOldGroup,
|
|
pSecDesc->Group,
|
|
True,
|
|
pDaclNew);
|
|
|
|
DBGPRINT(DBG_COMP_SECURITY, DBG_LEVEL_INFO,
|
|
("AfpSetAfpPermissions: Added %d Deny Aces\n",
|
|
pDaclNew->AceCount));
|
|
|
|
ASSERT(((PBYTE)pAce - (PBYTE)pDaclNew) < SizeNewDacl);
|
|
}
|
|
|
|
// Now add Aces for System, World, Admins, Group & Owner - in that order
|
|
pAce = afpAddAceToAcl(pDaclNew,
|
|
pAce,
|
|
AFP_READ_ACCESS | AFP_WRITE_ACCESS | AFP_OWNER_ACCESS,
|
|
&AfpSidSystem,
|
|
fDir);
|
|
|
|
DBGPRINT(DBG_COMP_SECURITY, DBG_LEVEL_INFO,
|
|
("AfpSetAfpPermissions: Added Aces for System (%d)\n",
|
|
pDaclNew->AceCount));
|
|
|
|
ASSERT(((PBYTE)pAce - (PBYTE)pDaclNew) < SizeNewDacl);
|
|
|
|
// Now add Ace for World
|
|
pAce = afpAddAceToAcl(pDaclNew,
|
|
pAce,
|
|
afpPermissions2NtMask(pFDParm->_fdp_WorldRights),
|
|
&AfpSidWorld,
|
|
fDir);
|
|
|
|
DBGPRINT(DBG_COMP_SECURITY, DBG_LEVEL_INFO,
|
|
("AfpSetAfpPermissions: Added Aces for World (%d)\n",
|
|
pDaclNew->AceCount));
|
|
|
|
ASSERT(((PBYTE)pAce - (PBYTE)pDaclNew) < SizeNewDacl);
|
|
|
|
if (AfpSidAdmins != NULL)
|
|
{
|
|
// Add the ALLOWED_ACE and the corres. inherit Ace for
|
|
// 'Domain Admins' on PDC/BDC, or 'MACHINE\Administrators' for
|
|
// standalone server
|
|
pAce = afpAddAceToAcl(pDaclNew,
|
|
pAce,
|
|
(AFP_READ_ACCESS | AFP_WRITE_ACCESS | AFP_OWNER_ACCESS | FILE_DELETE_CHILD),
|
|
AfpSidAdmins,
|
|
fDir);
|
|
}
|
|
|
|
DBGPRINT(DBG_COMP_SECURITY, DBG_LEVEL_INFO,
|
|
("AfpSetAfpPermissions: Added Aces for Admins (%d)\n",
|
|
pDaclNew->AceCount));
|
|
|
|
// Now add Ace for Group
|
|
if (!GroupIsWorld &&
|
|
!RtlEqualSid(pSecDesc->Group, &AfpSidNull) &&
|
|
(!AfpServerIsStandalone || !RtlEqualSid(pSecDesc->Group, AfpSidNone)))
|
|
{
|
|
pAce = afpAddAceToAcl(pDaclNew,
|
|
pAce,
|
|
afpPermissions2NtMask(pFDParm->_fdp_GroupRights),
|
|
pSecDesc->Group,
|
|
fDir);
|
|
|
|
DBGPRINT(DBG_COMP_SECURITY, DBG_LEVEL_INFO,
|
|
("AfpSetAfpPermissions: Added Aces for World (%d)\n",
|
|
pDaclNew->AceCount));
|
|
|
|
ASSERT(((PBYTE)pAce - (PBYTE)pDaclNew) < SizeNewDacl);
|
|
}
|
|
|
|
if (!OwnerIsWorld && !RtlEqualSid(pSecDesc->Owner, &AfpSidNull))
|
|
{
|
|
pFDParm->_fdp_OwnerRights |= DIR_ACCESS_OWNER;
|
|
pAce = afpAddAceToAcl(pDaclNew,
|
|
pAce,
|
|
afpPermissions2NtMask(pFDParm->_fdp_OwnerRights),
|
|
pSecDesc->Owner,
|
|
fDir);
|
|
|
|
DBGPRINT(DBG_COMP_SECURITY, DBG_LEVEL_INFO,
|
|
("AfpSetAfpPermissions: Added Aces for Group (%d)\n",
|
|
pDaclNew->AceCount));
|
|
|
|
ASSERT(((PBYTE)pAce - (PBYTE)pDaclNew) < SizeNewDacl);
|
|
}
|
|
|
|
// Now add in the Grant Aces from the original Dacl list weeding out
|
|
// the Aces for World, old and new owner, new and old group, creator
|
|
// owner and creator group
|
|
if (pSecDesc->Dacl != NULL)
|
|
{
|
|
pAce = afpMoveAces(pSecDesc->Dacl,
|
|
pAce,
|
|
pSidOldOwner,
|
|
pSecDesc->Owner,
|
|
pSidOldGroup,
|
|
pSecDesc->Group,
|
|
False,
|
|
pDaclNew);
|
|
|
|
DBGPRINT(DBG_COMP_SECURITY, DBG_LEVEL_INFO,
|
|
("AfpSetAfpPermissions: Added old Grant Aces (%d)\n",
|
|
pDaclNew->AceCount));
|
|
|
|
ASSERT(((PBYTE)pAce - (PBYTE)pDaclNew) < SizeNewDacl);
|
|
}
|
|
|
|
// Now set the new security descriptor
|
|
pSecDesc->Dacl = pDaclNew;
|
|
|
|
// We need to impersonate the FspToken while we do this
|
|
AfpImpersonateClient(NULL);
|
|
Status = NtSetSecurityObject(DirHandle, SecInfo, pSecDesc);
|
|
if (!NT_SUCCESS(Status))
|
|
Status = AfpIoConvertNTStatusToAfpStatus(Status);
|
|
AfpRevertBack();
|
|
} while (False);
|
|
|
|
// Free the allocated buffers before we return
|
|
if (pSecDesc != NULL)
|
|
AfpFreeMemory(pSecDesc);
|
|
if (pDaclNew != NULL)
|
|
AfpFreeMemory(pDaclNew);
|
|
|
|
|
|
#ifdef PROFILING
|
|
AfpGetPerfCounter(&TimeE);
|
|
TimeD.QuadPart = TimeE.QuadPart - TimeS.QuadPart;
|
|
INTERLOCKED_ADD_LARGE_INTGR(&AfpServerProfile->perf_SetPermsTime,
|
|
TimeD,
|
|
&AfpStatisticsLock);
|
|
#endif
|
|
return Status;
|
|
}
|
|
|
|
|
|
/*** afpPermissions2NtMask
|
|
*
|
|
* Map Afp permissions to Nt access mask. FILE_DELETE_CHILD is added ONLY
|
|
* when all the Afp bits are set. This is in line with the FileManager
|
|
* which only sets this bit if "Full Control" is specified. Also under
|
|
* NT security model, FILE_DELETE_CHILD overrides any child access control
|
|
* as far as the ability to delete that entity goes.
|
|
*/
|
|
LOCAL ACCESS_MASK
|
|
afpPermissions2NtMask(
|
|
IN BYTE AfpPermissions
|
|
)
|
|
{
|
|
ACCESS_MASK NtAccess = 0;
|
|
|
|
PAGED_CODE( );
|
|
|
|
if (AfpPermissions & DIR_ACCESS_OWNER)
|
|
NtAccess |= AFP_OWNER_ACCESS;
|
|
|
|
if ((AfpPermissions & DIR_ACCESS_ALL) == DIR_ACCESS_ALL)
|
|
NtAccess |= AFP_READ_ACCESS | AFP_WRITE_ACCESS | FILE_DELETE_CHILD;
|
|
else
|
|
{
|
|
if (AfpPermissions & (DIR_ACCESS_READ | DIR_ACCESS_SEARCH))
|
|
NtAccess |= AFP_READ_ACCESS;
|
|
|
|
if (AfpPermissions & DIR_ACCESS_WRITE)
|
|
NtAccess |= AFP_WRITE_ACCESS;
|
|
}
|
|
return NtAccess;
|
|
}
|
|
|
|
|
|
/*** afpAddAceToAcl
|
|
*
|
|
* Build an Ace corres. to the Sid(s) and mask and add these to the Acl. It is
|
|
* assumed that the Acl has space for the Aces. If the mask is 0 i.e. no access
|
|
* we give AFP_MIN_ACCESS. This is so that the file/dir permissions can be
|
|
* queried and a belted icon is generated instead of nothing.
|
|
*/
|
|
LOCAL PACCESS_ALLOWED_ACE
|
|
afpAddAceToAcl(
|
|
IN PACL pAcl,
|
|
IN PACCESS_ALLOWED_ACE pAce,
|
|
IN ACCESS_MASK Mask,
|
|
IN PSID pSid,
|
|
IN BOOLEAN fInherit
|
|
)
|
|
{
|
|
USHORT SidLen;
|
|
|
|
PAGED_CODE( );
|
|
|
|
SidLen = (USHORT)RtlLengthSid(pSid);
|
|
|
|
// Add a vanilla ace
|
|
pAcl->AceCount ++;
|
|
pAce->Mask = Mask | SYNCHRONIZE | AFP_MIN_ACCESS;
|
|
pAce->Header.AceFlags = 0;
|
|
pAce->Header.AceType = ACCESS_ALLOWED_ACE_TYPE;
|
|
pAce->Header.AceSize = (USHORT)(sizeof(ACE_HEADER) +
|
|
sizeof(ACCESS_MASK) +
|
|
SidLen);
|
|
|
|
RtlCopyMemory((PSID)(&pAce->SidStart), pSid, SidLen);
|
|
|
|
pAcl->AclSize += pAce->Header.AceSize;
|
|
|
|
AfpDumpSidnMask("afpAddAceToAcl ",
|
|
pSid,
|
|
pAce->Mask,
|
|
ACCESS_ALLOWED_ACE_TYPE,
|
|
pAce->Header.AceFlags);
|
|
|
|
// Now add an inherit ace
|
|
if (fInherit)
|
|
{
|
|
pAce = (PACCESS_ALLOWED_ACE)((PBYTE)pAce + pAce->Header.AceSize);
|
|
pAcl->AceCount ++;
|
|
pAce->Mask = Mask | SYNCHRONIZE | AFP_MIN_ACCESS;
|
|
pAce->Header.AceFlags = CONTAINER_INHERIT_ACE |
|
|
OBJECT_INHERIT_ACE |
|
|
INHERIT_ONLY_ACE;
|
|
pAce->Header.AceType = ACCESS_ALLOWED_ACE_TYPE;
|
|
pAce->Header.AceSize = (USHORT)(sizeof(ACE_HEADER) +
|
|
sizeof(ACCESS_MASK) +
|
|
SidLen);
|
|
RtlCopyMemory((PSID)(&pAce->SidStart), pSid, SidLen);
|
|
|
|
pAcl->AclSize += pAce->Header.AceSize;
|
|
|
|
AfpDumpSidnMask("afpAddAceToAcl (Inherit) ",
|
|
pSid,
|
|
pAce->Mask,
|
|
ACCESS_ALLOWED_ACE_TYPE,
|
|
pAce->Header.AceFlags);
|
|
}
|
|
|
|
return ((PACCESS_ALLOWED_ACE)((PBYTE)pAce + pAce->Header.AceSize));
|
|
}
|
|
|
|
|
|
#if DBG
|
|
|
|
/*** AfpDumpSid
|
|
*
|
|
*/
|
|
VOID
|
|
AfpDumpSid(
|
|
IN PBYTE pString,
|
|
IN PISID pSid
|
|
)
|
|
{
|
|
WCHAR Buffer[128];
|
|
UNICODE_STRING SidStr;
|
|
|
|
PAGED_CODE( );
|
|
|
|
AfpSetEmptyUnicodeString(&SidStr, sizeof(Buffer), Buffer);
|
|
if ((AfpDebugComponent & DBG_COMP_SECURITY) && (DBG_LEVEL_INFO >= AfpDebugLevel))
|
|
{
|
|
RtlConvertSidToUnicodeString(&SidStr, pSid, False);
|
|
|
|
DBGPRINT(DBG_COMP_SECURITY, DBG_LEVEL_INFO,
|
|
("%s %ws\n", pString, SidStr.Buffer));
|
|
}
|
|
}
|
|
|
|
/*** AfpDumpSidnMask
|
|
*
|
|
*/
|
|
VOID
|
|
AfpDumpSidnMask(
|
|
IN PBYTE pString,
|
|
IN PISID pSid,
|
|
IN DWORD Mask,
|
|
IN UCHAR Type,
|
|
IN UCHAR Flags
|
|
)
|
|
{
|
|
WCHAR Buffer[128];
|
|
UNICODE_STRING SidStr;
|
|
|
|
PAGED_CODE( );
|
|
|
|
AfpSetEmptyUnicodeString(&SidStr, sizeof(Buffer), Buffer);
|
|
if ((AfpDebugComponent & DBG_COMP_SECURITY) && (DBG_LEVEL_INFO >= AfpDebugLevel))
|
|
{
|
|
RtlConvertSidToUnicodeString(&SidStr, pSid, False);
|
|
|
|
DBGPRINT(DBG_COMP_SECURITY, DBG_LEVEL_INFO,
|
|
("%s Sid %ws, Mask %lx, Type %x, Flags %x\n",
|
|
pString, SidStr.Buffer, Mask, Type, Flags));
|
|
}
|
|
}
|
|
|
|
#endif
|
|
|