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1392 lines
32 KiB
1392 lines
32 KiB
/*++
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Copyright (c) 1991-1992 Microsoft Corporation
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Module Name:
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secobj.c
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Abstract:
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This module provides support routines to simplify the creation of
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security descriptors for user-mode objects.
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Adapted the code from \nt\private\net\netlib\secobj.h
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Author:
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Rita Wong (ritaw) 27-Feb-1991
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Environment:
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Contains NT specific code.
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Revision History:
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16-Apr-1991 JohnRo
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Include header files for <netlib.h>.
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14 Apr 1992 RichardW
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Changed for modified ACE_HEADER struct.
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19 Sep. 1995 MadanA
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Adapted the code for the internet project and made to use WIN32
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APIs instead RTL functions.
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--*/
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#include <windows.h>
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#include <rpc.h>
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#include <inetsec.h>
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#include <proto.h>
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#if DBG
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#define STATIC
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#else
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#define STATIC static
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#endif // DBG
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//-------------------------------------------------------------------//
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// //
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// Global variables //
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// //
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//-------------------------------------------------------------------//
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//
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// NT well-known SIDs
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//
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PSID NullSid = NULL; // No members SID
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PSID WorldSid = NULL; // All users SID
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PSID LocalSid = NULL; // NT local users SID
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PSID NetworkSid = NULL; // NT remote users SID
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PSID LocalSystemSid = NULL; // NT system processes SID
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PSID BuiltinDomainSid = NULL; // Domain Id of the Builtin Domain
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//
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// Well Known Aliases.
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//
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// These are aliases that are relative to the built-in domain.
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//
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PSID LocalAdminSid = NULL; // NT local admins SID
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PSID AliasAdminsSid = NULL;
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PSID AliasUsersSid = NULL;
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PSID AliasGuestsSid = NULL;
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PSID AliasPowerUsersSid = NULL;
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PSID AliasAccountOpsSid = NULL;
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PSID AliasSystemOpsSid = NULL;
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PSID AliasPrintOpsSid = NULL;
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PSID AliasBackupOpsSid = NULL;
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STATIC
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struct _SID_DATA {
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PSID *Sid;
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SID_IDENTIFIER_AUTHORITY IdentifierAuthority;
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ULONG SubAuthority;
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} SidData[] = {
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{&NullSid, SECURITY_NULL_SID_AUTHORITY, SECURITY_NULL_RID},
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{&WorldSid, SECURITY_WORLD_SID_AUTHORITY, SECURITY_WORLD_RID},
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{&LocalSid, SECURITY_LOCAL_SID_AUTHORITY, SECURITY_LOCAL_RID},
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{&NetworkSid, SECURITY_NT_AUTHORITY, SECURITY_NETWORK_RID},
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{&LocalSystemSid, SECURITY_NT_AUTHORITY, SECURITY_LOCAL_SYSTEM_RID},
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{&BuiltinDomainSid, SECURITY_NT_AUTHORITY, SECURITY_BUILTIN_DOMAIN_RID}
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};
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STATIC
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struct _BUILTIN_DOMAIN_SID_DATA {
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PSID *Sid;
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ULONG RelativeId;
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} BuiltinDomainSidData[] = {
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{ &LocalAdminSid, DOMAIN_ALIAS_RID_ADMINS},
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{ &AliasAdminsSid, DOMAIN_ALIAS_RID_ADMINS },
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{ &AliasUsersSid, DOMAIN_ALIAS_RID_USERS },
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{ &AliasGuestsSid, DOMAIN_ALIAS_RID_GUESTS },
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{ &AliasPowerUsersSid, DOMAIN_ALIAS_RID_POWER_USERS },
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{ &AliasAccountOpsSid, DOMAIN_ALIAS_RID_ACCOUNT_OPS },
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{ &AliasSystemOpsSid, DOMAIN_ALIAS_RID_SYSTEM_OPS },
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{ &AliasPrintOpsSid, DOMAIN_ALIAS_RID_PRINT_OPS },
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{ &AliasBackupOpsSid, DOMAIN_ALIAS_RID_BACKUP_OPS }
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};
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PVOID
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INetpMemoryAllocate(
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DWORD Size
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)
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/*++
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Routine Description:
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This function allocates the required size of memory by calling
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LocalAlloc.
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Arguments:
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Size - size of the memory block required.
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Return Value:
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Pointer to the allocated block.
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--*/
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{
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LPVOID NewPointer;
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NewPointer = LocalAlloc( LMEM_FIXED | LMEM_ZEROINIT, Size );
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#if DBG
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// ASSERT( NewPointer != NULL );
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#endif
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return( NewPointer );
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}
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VOID
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INetpMemoryFree(
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PVOID Memory
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)
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/*++
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Routine Description:
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This function frees up the memory that was allocated by
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InternetAllocateMemory.
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Arguments:
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Memory - pointer to the memory block that needs to be freed up.
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Return Value:
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none.
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--*/
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{
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LPVOID Ptr;
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#if DBG
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// ASSERT( Memory != NULL );
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#endif
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Ptr = LocalFree( Memory );
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#if DBG
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// ASSERT( Ptr == NULL );
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#endif
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}
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DWORD
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INetpInitializeAllowedAce(
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IN PACCESS_ALLOWED_ACE AllowedAce,
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IN USHORT AceSize,
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IN BYTE InheritFlags,
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IN BYTE AceFlags,
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IN ACCESS_MASK Mask,
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IN PSID AllowedSid
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)
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/*++
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Routine Description:
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This function assigns the specified ACE values into an allowed type ACE.
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Arguments:
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AllowedAce - Supplies a pointer to the ACE that is initialized.
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AceSize - Supplies the size of the ACE in bytes.
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InheritFlags - Supplies ACE inherit flags.
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AceFlags - Supplies ACE type specific control flags.
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Mask - Supplies the allowed access masks.
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AllowedSid - Supplies the pointer to the SID of user/group which is allowed
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the specified access.
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Return Value:
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WIN32 Error Code.
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--*/
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{
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AllowedAce->Header.AceType = ACCESS_ALLOWED_ACE_TYPE;
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AllowedAce->Header.AceSize = AceSize;
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AllowedAce->Header.AceFlags = AceFlags | InheritFlags;
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AllowedAce->Mask = Mask;
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if( CopySid(
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GetLengthSid(AllowedSid), // should be valid SID ??
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&(AllowedAce->SidStart),
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AllowedSid ) == FALSE ) {
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return( GetLastError() );
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}
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return( ERROR_SUCCESS );
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}
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DWORD
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INetpInitializeDeniedAce(
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IN PACCESS_DENIED_ACE DeniedAce,
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IN USHORT AceSize,
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IN BYTE InheritFlags,
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IN BYTE AceFlags,
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IN ACCESS_MASK Mask,
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IN PSID DeniedSid
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)
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/*++
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Routine Description:
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This function assigns the specified ACE values into a denied type ACE.
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Arguments:
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DeniedAce - Supplies a pointer to the ACE that is initialized.
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AceSize - Supplies the size of the ACE in bytes.
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InheritFlags - Supplies ACE inherit flags.
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AceFlags - Supplies ACE type specific control flags.
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Mask - Supplies the denied access masks.
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AllowedSid - Supplies the pointer to the SID of user/group which is denied
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the specified access.
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Return Value:
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WIN32 Error Code.
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--*/
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{
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DeniedAce->Header.AceType = ACCESS_DENIED_ACE_TYPE;
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DeniedAce->Header.AceSize = AceSize;
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DeniedAce->Header.AceFlags = AceFlags | InheritFlags;
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DeniedAce->Mask = Mask;
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if( CopySid(
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GetLengthSid(DeniedSid), // should be valid SID ??
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&(DeniedAce->SidStart),
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DeniedSid ) == FALSE ) {
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return( GetLastError() );
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}
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return( ERROR_SUCCESS );
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}
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DWORD
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INetpInitializeAuditAce(
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IN PACCESS_ALLOWED_ACE AuditAce,
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IN USHORT AceSize,
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IN BYTE InheritFlags,
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IN BYTE AceFlags,
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IN ACCESS_MASK Mask,
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IN PSID AuditSid
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)
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/*++
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Routine Description:
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This function assigns the specified ACE values into an audit type ACE.
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Arguments:
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AuditAce - Supplies a pointer to the ACE that is initialized.
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AceSize - Supplies the size of the ACE in bytes.
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InheritFlags - Supplies ACE inherit flags.
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AceFlags - Supplies ACE type specific control flags.
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Mask - Supplies the allowed access masks.
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AuditSid - Supplies the pointer to the SID of user/group which is to be
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audited.
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Return Value:
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WIN32 Error Code.
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--*/
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{
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AuditAce->Header.AceType = SYSTEM_AUDIT_ACE_TYPE;
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AuditAce->Header.AceSize = AceSize;
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AuditAce->Header.AceFlags = AceFlags | InheritFlags;
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AuditAce->Mask = Mask;
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if( CopySid(
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GetLengthSid(AuditSid),
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&(AuditAce->SidStart),
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AuditSid ) == FALSE ) {
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return( GetLastError() );
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}
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return( ERROR_SUCCESS );
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}
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DWORD
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INetpAllocateAndInitializeSid(
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OUT PSID *Sid,
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IN PSID_IDENTIFIER_AUTHORITY IdentifierAuthority,
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IN ULONG SubAuthorityCount
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)
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/*++
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Routine Description:
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This function allocates memory for a SID and initializes it.
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Arguments:
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None.
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Return Value:
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WIN32 Error Code.
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--*/
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{
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*Sid = (PSID)
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INetpMemoryAllocate(
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GetSidLengthRequired( (BYTE)SubAuthorityCount) );
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if (*Sid == NULL) {
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return ERROR_NOT_ENOUGH_MEMORY;
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}
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InitializeSid( *Sid, IdentifierAuthority, (BYTE)SubAuthorityCount );
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return( ERROR_SUCCESS );
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}
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DWORD
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INetpDomainIdToSid(
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IN PSID DomainId,
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IN ULONG RelativeId,
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OUT PSID *Sid
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)
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/*++
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Routine Description:
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Given a domain Id and a relative ID create a SID
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Arguments:
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DomainId - The template SID to use.
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RelativeId - The relative Id to append to the DomainId.
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Sid - Returns a pointer to an allocated buffer containing the resultant
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Sid. Free this buffer using NetpMemoryFree.
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Return Value:
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WIN32 Error Code.
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--*/
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{
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DWORD Error;
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BYTE DomainIdSubAuthorityCount; // Number of sub authorities in domain ID
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ULONG SidLength; // Length of newly allocated SID
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//
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// Allocate a Sid which has one more sub-authority than the domain ID.
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//
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DomainIdSubAuthorityCount = *(GetSidSubAuthorityCount( DomainId ));
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SidLength = GetSidLengthRequired( (BYTE)(DomainIdSubAuthorityCount+1) );
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if ((*Sid = (PSID) INetpMemoryAllocate( SidLength )) == NULL ) {
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return ERROR_NOT_ENOUGH_MEMORY;
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}
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//
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// Initialize the new SID to have the same inital value as the
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// domain ID.
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//
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if( CopySid(SidLength, *Sid, DomainId) == FALSE ) {
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Error = GetLastError();
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INetpMemoryFree( *Sid );
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return( Error );
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}
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//
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// Adjust the sub-authority count and
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// add the relative Id unique to the newly allocated SID
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//
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(*(GetSidSubAuthorityCount( *Sid ))) ++;
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*GetSidSubAuthority( *Sid, DomainIdSubAuthorityCount ) = RelativeId;
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return( ERROR_SUCCESS );
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}
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DWORD
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INetpCreateSecurityDescriptor(
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IN PACE_DATA AceData,
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IN ULONG AceCount,
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IN PSID OwnerSid OPTIONAL,
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IN PSID GroupSid OPTIONAL,
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OUT PSECURITY_DESCRIPTOR *NewDescriptor
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)
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/*++
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Routine Description:
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This function creates an absolutes security descriptor containing
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the supplied ACE information.
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A sample usage of this function:
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//
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// Order matters! These ACEs are inserted into the DACL in the
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// following order. Security access is granted or denied based on
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// the order of the ACEs in the DACL.
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//
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ACE_DATA AceData[4] = {
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{ACCESS_ALLOWED_ACE_TYPE, 0, 0,
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GENERIC_ALL, &LocalAdminSid},
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{ACCESS_DENIED_ACE_TYPE, 0, 0,
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GENERIC_ALL, &NetworkSid},
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{ACCESS_ALLOWED_ACE_TYPE, 0, 0,
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WKSTA_CONFIG_GUEST_INFO_GET |
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WKSTA_CONFIG_USER_INFO_GET, &DomainUsersSid},
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{ACCESS_ALLOWED_ACE_TYPE, 0, 0,
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WKSTA_CONFIG_GUEST_INFO_GET, &DomainGuestsSid}
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};
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return NetpCreateSecurityDescriptor(
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AceData,
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4,
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NullSid,
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LocalSystemSid,
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&ConfigurationInfoSd
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);
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Arguments:
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AceData - Supplies the structure of information that describes the DACL.
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AceCount - Supplies the number of entries in AceData structure.
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OwnerSid - Supplies the pointer to the SID of the security descriptor
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owner. If not specified, a security descriptor with no owner
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will be created.
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GroupSid - Supplies the pointer to the SID of the security descriptor
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primary group. If not specified, a security descriptor with no primary
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group will be created.
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NewDescriptor - Returns a pointer to the absolute secutiry descriptor
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allocated using NetpMemoryAllocate.
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Return Value:
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WIN32 Error Code.
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--*/
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{
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DWORD Error;
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DWORD i;
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|
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//
|
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// Pointer to memory dynamically allocated by this routine to hold
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// the absolute security descriptor, the DACL, the SACL, and all the ACEs.
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//
|
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// +---------------------------------------------------------------+
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// | Security Descriptor |
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// +-------------------------------+-------+---------------+-------+
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// | DACL | ACE 1 | . . . | ACE n |
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// +-------------------------------+-------+---------------+-------+
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// | SACL | ACE 1 | . . . | ACE n |
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// +-------------------------------+-------+---------------+-------+
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//
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PSECURITY_DESCRIPTOR AbsoluteSd = NULL;
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PACL Dacl = NULL; // Pointer to the DACL portion of above buffer
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PACL Sacl = NULL; // Pointer to the SACL portion of above buffer
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|
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DWORD DaclSize = sizeof(ACL);
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DWORD SaclSize = sizeof(ACL);
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DWORD MaxAceSize = 0;
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PVOID MaxAce = NULL;
|
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|
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LPBYTE CurrentAvailable;
|
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DWORD Size;
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|
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// ASSERT( AceCount > 0 );
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|
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//
|
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// Compute the total size of the DACL and SACL ACEs and the maximum
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// size of any ACE.
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//
|
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for (i = 0; i < AceCount; i++) {
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DWORD AceSize;
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AceSize = GetLengthSid( *(AceData[i].Sid) );
|
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|
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switch (AceData[i].AceType) {
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case ACCESS_ALLOWED_ACE_TYPE:
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AceSize += sizeof(ACCESS_ALLOWED_ACE);
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DaclSize += AceSize;
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break;
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case ACCESS_DENIED_ACE_TYPE:
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AceSize += sizeof(ACCESS_DENIED_ACE);
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DaclSize += AceSize;
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break;
|
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case SYSTEM_AUDIT_ACE_TYPE:
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AceSize += sizeof(SYSTEM_AUDIT_ACE);
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SaclSize += AceSize;
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break;
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default:
|
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return( ERROR_INVALID_PARAMETER );
|
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}
|
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MaxAceSize = max( MaxAceSize, AceSize );
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}
|
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|
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//
|
|
// Allocate a chunk of memory large enough the security descriptor
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|
// the DACL, the SACL and all ACEs.
|
|
//
|
|
// A security descriptor is of opaque data type but
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// SECURITY_DESCRIPTOR_MIN_LENGTH is the right size.
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//
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Size = SECURITY_DESCRIPTOR_MIN_LENGTH;
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|
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if ( DaclSize != sizeof(ACL) ) {
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Size += DaclSize;
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}
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|
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if ( SaclSize != sizeof(ACL) ) {
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Size += SaclSize;
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}
|
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|
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if ((AbsoluteSd = INetpMemoryAllocate( Size )) == NULL) {
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|
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Error = ERROR_NOT_ENOUGH_MEMORY;
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goto Cleanup;
|
|
}
|
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|
|
//
|
|
// Initialize the Dacl and Sacl
|
|
//
|
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|
|
CurrentAvailable = (LPBYTE)AbsoluteSd + SECURITY_DESCRIPTOR_MIN_LENGTH;
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|
|
if ( DaclSize != sizeof(ACL) ) {
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|
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Dacl = (PACL)CurrentAvailable;
|
|
CurrentAvailable += DaclSize;
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|
|
if( InitializeAcl( Dacl, DaclSize, ACL_REVISION ) == FALSE ) {
|
|
|
|
Error = GetLastError();
|
|
goto Cleanup;
|
|
}
|
|
}
|
|
|
|
if ( SaclSize != sizeof(ACL) ) {
|
|
|
|
Sacl = (PACL)CurrentAvailable;
|
|
CurrentAvailable += SaclSize;
|
|
|
|
if( InitializeAcl( Sacl, SaclSize, ACL_REVISION ) == FALSE ) {
|
|
|
|
Error = GetLastError();
|
|
goto Cleanup;
|
|
}
|
|
}
|
|
|
|
//
|
|
// Allocate a temporary buffer big enough for the biggest ACE.
|
|
//
|
|
|
|
if ((MaxAce = INetpMemoryAllocate( MaxAceSize )) == NULL ) {
|
|
|
|
Error = ERROR_NOT_ENOUGH_MEMORY;
|
|
goto Cleanup;
|
|
}
|
|
|
|
//
|
|
// Initialize each ACE, and append it into the end of the DACL or SACL.
|
|
//
|
|
|
|
for (i = 0; i < AceCount; i++) {
|
|
|
|
DWORD AceSize;
|
|
PACL CurrentAcl;
|
|
|
|
AceSize = GetLengthSid( *(AceData[i].Sid) );
|
|
|
|
switch (AceData[i].AceType) {
|
|
case ACCESS_ALLOWED_ACE_TYPE:
|
|
|
|
AceSize += sizeof(ACCESS_ALLOWED_ACE);
|
|
CurrentAcl = Dacl;
|
|
|
|
Error = INetpInitializeAllowedAce(
|
|
MaxAce,
|
|
(USHORT) AceSize,
|
|
AceData[i].InheritFlags,
|
|
AceData[i].AceFlags,
|
|
AceData[i].Mask,
|
|
*(AceData[i].Sid) );
|
|
break;
|
|
|
|
case ACCESS_DENIED_ACE_TYPE:
|
|
|
|
AceSize += sizeof(ACCESS_DENIED_ACE);
|
|
CurrentAcl = Dacl;
|
|
|
|
Error = INetpInitializeDeniedAce(
|
|
MaxAce,
|
|
(USHORT) AceSize,
|
|
AceData[i].InheritFlags,
|
|
AceData[i].AceFlags,
|
|
AceData[i].Mask,
|
|
*(AceData[i].Sid) );
|
|
break;
|
|
|
|
case SYSTEM_AUDIT_ACE_TYPE:
|
|
|
|
AceSize += sizeof(SYSTEM_AUDIT_ACE);
|
|
CurrentAcl = Sacl;
|
|
|
|
Error = INetpInitializeAuditAce(
|
|
MaxAce,
|
|
(USHORT) AceSize,
|
|
AceData[i].InheritFlags,
|
|
AceData[i].AceFlags,
|
|
AceData[i].Mask,
|
|
*(AceData[i].Sid) );
|
|
break;
|
|
}
|
|
|
|
if ( Error != ERROR_SUCCESS ) {
|
|
goto Cleanup;
|
|
}
|
|
|
|
//
|
|
// Append the initialized ACE to the end of DACL or SACL
|
|
//
|
|
|
|
|
|
if ( AddAce(
|
|
CurrentAcl,
|
|
ACL_REVISION,
|
|
MAXDWORD,
|
|
MaxAce,
|
|
AceSize ) == FALSE ) {
|
|
|
|
Error = GetLastError();
|
|
goto Cleanup;
|
|
}
|
|
}
|
|
|
|
//
|
|
// Create the security descriptor with absolute pointers to SIDs
|
|
// and ACLs.
|
|
//
|
|
// Owner = OwnerSid
|
|
// Group = GroupSid
|
|
// Dacl = Dacl
|
|
// Sacl = Sacl
|
|
//
|
|
|
|
if ( InitializeSecurityDescriptor(
|
|
AbsoluteSd,
|
|
SECURITY_DESCRIPTOR_REVISION ) == FALSE ) {
|
|
|
|
Error = GetLastError();
|
|
goto Cleanup;
|
|
}
|
|
|
|
if ( SetSecurityDescriptorOwner(
|
|
AbsoluteSd,
|
|
OwnerSid,
|
|
FALSE ) == FALSE ) {
|
|
|
|
Error = GetLastError();
|
|
goto Cleanup;
|
|
}
|
|
|
|
if ( SetSecurityDescriptorGroup(
|
|
AbsoluteSd,
|
|
GroupSid,
|
|
FALSE ) == FALSE ) {
|
|
|
|
Error = GetLastError();
|
|
goto Cleanup;
|
|
}
|
|
|
|
if ( SetSecurityDescriptorDacl(
|
|
AbsoluteSd,
|
|
TRUE,
|
|
Dacl,
|
|
FALSE ) == FALSE ) {
|
|
|
|
Error = GetLastError();
|
|
goto Cleanup;
|
|
}
|
|
|
|
if ( SetSecurityDescriptorSacl(
|
|
AbsoluteSd,
|
|
FALSE,
|
|
Sacl,
|
|
FALSE ) == FALSE ) {
|
|
|
|
Error = GetLastError();
|
|
goto Cleanup;
|
|
}
|
|
|
|
//
|
|
// Done
|
|
//
|
|
|
|
*NewDescriptor = AbsoluteSd;
|
|
AbsoluteSd = NULL;
|
|
Error = ERROR_SUCCESS;
|
|
|
|
//
|
|
// Clean up
|
|
//
|
|
|
|
Cleanup:
|
|
|
|
if( AbsoluteSd != NULL ) {
|
|
|
|
//
|
|
// delete the partially made SD if we are not completely
|
|
// successful
|
|
//
|
|
|
|
INetpMemoryFree( AbsoluteSd );
|
|
}
|
|
|
|
//
|
|
// Delete the temporary ACE
|
|
//
|
|
|
|
if ( MaxAce != NULL ) {
|
|
|
|
INetpMemoryFree( MaxAce );
|
|
}
|
|
|
|
return( Error );
|
|
}
|
|
|
|
DWORD
|
|
INetCreateWellKnownSids(
|
|
VOID
|
|
)
|
|
/*++
|
|
|
|
Routine Description:
|
|
|
|
This function creates some well-known SIDs and store them in global
|
|
variables.
|
|
|
|
Arguments:
|
|
|
|
none.
|
|
|
|
Return Value:
|
|
|
|
WIN32 Error Code.
|
|
|
|
--*/
|
|
{
|
|
DWORD Error;
|
|
DWORD i;
|
|
|
|
//
|
|
// Allocate and initialize well-known SIDs which aren't relative to
|
|
// the domain Id.
|
|
//
|
|
|
|
for (i = 0; i < (sizeof(SidData) / sizeof(SidData[0])) ; i++) {
|
|
|
|
Error = INetpAllocateAndInitializeSid(
|
|
SidData[i].Sid,
|
|
&(SidData[i].IdentifierAuthority),
|
|
1);
|
|
|
|
if ( Error != ERROR_SUCCESS ) {
|
|
return Error;
|
|
}
|
|
|
|
*(GetSidSubAuthority(*(SidData[i].Sid), 0)) = SidData[i].SubAuthority;
|
|
}
|
|
|
|
//
|
|
// Build each SID which is relative to the Builtin Domain Id.
|
|
//
|
|
|
|
for ( i = 0;
|
|
i < (sizeof(BuiltinDomainSidData) /
|
|
sizeof(BuiltinDomainSidData[0]));
|
|
i++) {
|
|
|
|
|
|
Error = INetpDomainIdToSid(
|
|
BuiltinDomainSid,
|
|
BuiltinDomainSidData[i].RelativeId,
|
|
BuiltinDomainSidData[i].Sid );
|
|
|
|
if ( Error != ERROR_SUCCESS ) {
|
|
return Error;
|
|
}
|
|
}
|
|
|
|
return ERROR_SUCCESS;
|
|
}
|
|
|
|
VOID
|
|
INetFreeWellKnownSids(
|
|
VOID
|
|
)
|
|
/*++
|
|
|
|
Routine Description:
|
|
|
|
This function frees up the dynamic memory consumed by the well-known
|
|
SIDs.
|
|
|
|
Arguments:
|
|
|
|
none.
|
|
|
|
Return Value:
|
|
|
|
none
|
|
|
|
--*/
|
|
{
|
|
DWORD i;
|
|
|
|
//
|
|
// free up memory allocated for well-known SIDs
|
|
//
|
|
|
|
for (i = 0; i < (sizeof(SidData) / sizeof(SidData[0])) ; i++) {
|
|
|
|
if( *SidData[i].Sid != NULL ) {
|
|
INetpMemoryFree( *SidData[i].Sid );
|
|
*SidData[i].Sid = NULL;
|
|
}
|
|
}
|
|
|
|
//
|
|
// free up memory allocated for Builtin Domain SIDs
|
|
//
|
|
|
|
for (i = 0;
|
|
i < (sizeof(BuiltinDomainSidData) /
|
|
sizeof(BuiltinDomainSidData[0])) ;
|
|
i++) {
|
|
|
|
if( *BuiltinDomainSidData[i].Sid != NULL ) {
|
|
INetpMemoryFree( *BuiltinDomainSidData[i].Sid );
|
|
*BuiltinDomainSidData[i].Sid = NULL;
|
|
}
|
|
}
|
|
|
|
}
|
|
|
|
DWORD
|
|
INetCreateSecurityObject(
|
|
IN PACE_DATA AceData,
|
|
IN ULONG AceCount,
|
|
IN PSID OwnerSid,
|
|
IN PSID GroupSid,
|
|
IN PGENERIC_MAPPING GenericMapping,
|
|
OUT PSECURITY_DESCRIPTOR *NewDescriptor
|
|
)
|
|
/*++
|
|
|
|
Routine Description:
|
|
|
|
This function creates the DACL for the security descriptor based on
|
|
on the ACE information specified, and creates the security descriptor
|
|
which becomes the user-mode security object.
|
|
|
|
A sample usage of this function:
|
|
|
|
//
|
|
// Structure that describes the mapping of Generic access rights to
|
|
// object specific access rights for the ConfigurationInfo object.
|
|
//
|
|
|
|
GENERIC_MAPPING WsConfigInfoMapping = {
|
|
STANDARD_RIGHTS_READ | // Generic read
|
|
WKSTA_CONFIG_GUEST_INFO_GET |
|
|
WKSTA_CONFIG_USER_INFO_GET |
|
|
WKSTA_CONFIG_ADMIN_INFO_GET,
|
|
STANDARD_RIGHTS_WRITE | // Generic write
|
|
WKSTA_CONFIG_INFO_SET,
|
|
STANDARD_RIGHTS_EXECUTE, // Generic execute
|
|
WKSTA_CONFIG_ALL_ACCESS // Generic all
|
|
};
|
|
|
|
//
|
|
// Order matters! These ACEs are inserted into the DACL in the
|
|
// following order. Security access is granted or denied based on
|
|
// the order of the ACEs in the DACL.
|
|
//
|
|
|
|
ACE_DATA AceData[4] = {
|
|
{ACCESS_ALLOWED_ACE_TYPE, 0, 0,
|
|
GENERIC_ALL, &LocalAdminSid},
|
|
|
|
{ACCESS_DENIED_ACE_TYPE, 0, 0,
|
|
GENERIC_ALL, &NetworkSid},
|
|
|
|
{ACCESS_ALLOWED_ACE_TYPE, 0, 0,
|
|
WKSTA_CONFIG_GUEST_INFO_GET |
|
|
WKSTA_CONFIG_USER_INFO_GET, &DomainUsersSid},
|
|
|
|
{ACCESS_ALLOWED_ACE_TYPE, 0, 0,
|
|
WKSTA_CONFIG_GUEST_INFO_GET, &DomainGuestsSid}
|
|
};
|
|
|
|
return INetCreateSecurityObject(
|
|
AceData,
|
|
4,
|
|
NullSid,
|
|
LocalSystemSid,
|
|
&WsConfigInfoMapping,
|
|
&ConfigurationInfoSd
|
|
);
|
|
|
|
Arguments:
|
|
|
|
AceData - Supplies the structure of information that describes the DACL.
|
|
|
|
AceCount - Supplies the number of entries in AceData structure.
|
|
|
|
OwnerSid - Supplies the pointer to the SID of the security descriptor
|
|
owner.
|
|
|
|
GroupSid - Supplies the pointer to the SID of the security descriptor
|
|
primary group.
|
|
|
|
GenericMapping - Supplies the pointer to a generic mapping array denoting
|
|
the mapping between each generic right to specific rights.
|
|
|
|
NewDescriptor - Returns a pointer to the self-relative security descriptor
|
|
which represents the user-mode object.
|
|
|
|
Return Value:
|
|
|
|
WIN32 Error Code.
|
|
|
|
NOTE : the security object created by calling this function may be
|
|
freed up by calling INetDeleteSecurityObject().
|
|
|
|
--*/
|
|
{
|
|
DWORD Error;
|
|
PSECURITY_DESCRIPTOR AbsoluteSd = NULL;
|
|
HANDLE TokenHandle = NULL;
|
|
|
|
|
|
Error = INetpCreateSecurityDescriptor(
|
|
AceData,
|
|
AceCount,
|
|
OwnerSid,
|
|
GroupSid,
|
|
&AbsoluteSd
|
|
);
|
|
|
|
if( Error != ERROR_SUCCESS ) {
|
|
return( Error );
|
|
}
|
|
|
|
if( OpenProcessToken(
|
|
GetCurrentProcess(),
|
|
TOKEN_QUERY,
|
|
&TokenHandle ) == FALSE ) {
|
|
|
|
TokenHandle = INVALID_HANDLE_VALUE;
|
|
Error = GetLastError();
|
|
goto Cleanup;
|
|
}
|
|
|
|
//
|
|
// Create the security object (a user-mode object is really a pseudo-
|
|
// object represented by a security descriptor that have relative
|
|
// pointers to SIDs and ACLs). This routine allocates the memory to
|
|
// hold the relative security descriptor so the memory allocated for the
|
|
// DACL, ACEs, and the absolute descriptor can be freed.
|
|
//
|
|
if( CreatePrivateObjectSecurity(
|
|
NULL, // Parent descriptor
|
|
AbsoluteSd, // Creator descriptor
|
|
NewDescriptor, // Pointer to new descriptor
|
|
FALSE, // Is directory object
|
|
TokenHandle, // Token
|
|
GenericMapping // Generic mapping
|
|
) == FALSE ) {
|
|
|
|
Error = GetLastError();
|
|
goto Cleanup;
|
|
}
|
|
|
|
Error = ERROR_SUCCESS;
|
|
|
|
Cleanup:
|
|
|
|
if( TokenHandle != NULL ) {
|
|
CloseHandle( TokenHandle );
|
|
}
|
|
|
|
//
|
|
// Free dynamic memory before returning
|
|
//
|
|
|
|
if( AbsoluteSd != NULL ) {
|
|
INetpMemoryFree( AbsoluteSd );
|
|
}
|
|
|
|
return( Error );
|
|
}
|
|
|
|
DWORD
|
|
INetDeleteSecurityObject(
|
|
IN PSECURITY_DESCRIPTOR *Descriptor
|
|
)
|
|
/*++
|
|
|
|
Routine Description:
|
|
|
|
This function deletes a security object that was created by calling
|
|
INetCreateSecurityObject() function.
|
|
|
|
Arguments:
|
|
|
|
Descriptor - Returns a pointer to the self-relative security descriptor
|
|
which represents the user-mode object.
|
|
|
|
Return Value:
|
|
|
|
WIN32 Error Code.
|
|
|
|
--*/
|
|
{
|
|
if( DestroyPrivateObjectSecurity( Descriptor ) == FALSE ) {
|
|
|
|
return( GetLastError() );
|
|
}
|
|
|
|
return( ERROR_SUCCESS );
|
|
}
|
|
|
|
DWORD
|
|
INetAccessCheckAndAuditW(
|
|
IN LPCWSTR SubsystemName,
|
|
IN LPWSTR ObjectTypeName,
|
|
IN PSECURITY_DESCRIPTOR SecurityDescriptor,
|
|
IN ACCESS_MASK DesiredAccess,
|
|
IN PGENERIC_MAPPING GenericMapping
|
|
)
|
|
/*++
|
|
|
|
Routine Description:
|
|
|
|
This function impersonates the caller so that it can perform access
|
|
validation using NtAccessCheckAndAuditAlarm; and reverts back to
|
|
itself before returning.
|
|
|
|
Arguments:
|
|
|
|
SubsystemName - Supplies a name string identifying the subsystem
|
|
calling this routine.
|
|
|
|
ObjectTypeName - Supplies the name of the type of the object being
|
|
accessed.
|
|
|
|
SecurityDescriptor - A pointer to the Security Descriptor against which
|
|
acccess is to be checked.
|
|
|
|
DesiredAccess - Supplies desired acccess mask. This mask must have been
|
|
previously mapped to contain no generic accesses.
|
|
|
|
GenericMapping - Supplies a pointer to the generic mapping associated
|
|
with this object type.
|
|
|
|
Return Value:
|
|
|
|
NET_API_STATUS - NERR_Success or reason for failure.
|
|
|
|
--*/
|
|
{
|
|
DWORD Error;
|
|
|
|
ACCESS_MASK GrantedAccess;
|
|
BOOL GenerateOnClose;
|
|
BOOL AccessStatus;
|
|
|
|
Error = RpcImpersonateClient( NULL ) ;
|
|
|
|
if( Error != ERROR_SUCCESS ) {
|
|
return( Error );
|
|
}
|
|
|
|
if( AccessCheckAndAuditAlarmW(
|
|
SubsystemName,
|
|
NULL, // No handle for object
|
|
ObjectTypeName,
|
|
NULL,
|
|
SecurityDescriptor,
|
|
DesiredAccess,
|
|
GenericMapping,
|
|
FALSE, // open existing object.
|
|
&GrantedAccess,
|
|
&AccessStatus,
|
|
&GenerateOnClose ) == FALSE ) {
|
|
|
|
Error = GetLastError();
|
|
goto Cleanup;
|
|
}
|
|
|
|
if ( AccessStatus == FALSE ) {
|
|
|
|
Error = ERROR_ACCESS_DENIED;
|
|
goto Cleanup;
|
|
}
|
|
|
|
Error = ERROR_SUCCESS;
|
|
|
|
Cleanup:
|
|
|
|
RpcRevertToSelf();
|
|
|
|
return( Error );
|
|
}
|
|
|
|
DWORD
|
|
INetAccessCheckAndAuditA(
|
|
IN LPCSTR SubsystemName,
|
|
IN LPSTR ObjectTypeName,
|
|
IN PSECURITY_DESCRIPTOR SecurityDescriptor,
|
|
IN ACCESS_MASK DesiredAccess,
|
|
IN PGENERIC_MAPPING GenericMapping
|
|
)
|
|
/*++
|
|
|
|
Routine Description:
|
|
|
|
This function impersonates the caller so that it can perform access
|
|
validation using NtAccessCheckAndAuditAlarm; and reverts back to
|
|
itself before returning.
|
|
|
|
Arguments:
|
|
|
|
SubsystemName - Supplies a name string identifying the subsystem
|
|
calling this routine.
|
|
|
|
ObjectTypeName - Supplies the name of the type of the object being
|
|
accessed.
|
|
|
|
SecurityDescriptor - A pointer to the Security Descriptor against which
|
|
acccess is to be checked.
|
|
|
|
DesiredAccess - Supplies desired acccess mask. This mask must have been
|
|
previously mapped to contain no generic accesses.
|
|
|
|
GenericMapping - Supplies a pointer to the generic mapping associated
|
|
with this object type.
|
|
|
|
Return Value:
|
|
|
|
NET_API_STATUS - NERR_Success or reason for failure.
|
|
|
|
--*/
|
|
{
|
|
DWORD Error;
|
|
|
|
ACCESS_MASK GrantedAccess;
|
|
BOOL GenerateOnClose;
|
|
BOOL AccessStatus;
|
|
|
|
Error = RpcImpersonateClient( NULL ) ;
|
|
|
|
if( Error != ERROR_SUCCESS ) {
|
|
return( Error );
|
|
}
|
|
|
|
if( AccessCheckAndAuditAlarmA(
|
|
SubsystemName,
|
|
NULL, // No handle for object
|
|
ObjectTypeName,
|
|
NULL,
|
|
SecurityDescriptor,
|
|
DesiredAccess,
|
|
GenericMapping,
|
|
FALSE, // open existing object.
|
|
&GrantedAccess,
|
|
&AccessStatus,
|
|
&GenerateOnClose ) == FALSE ) {
|
|
|
|
Error = GetLastError();
|
|
goto Cleanup;
|
|
}
|
|
|
|
if ( AccessStatus == FALSE ) {
|
|
|
|
Error = ERROR_ACCESS_DENIED;
|
|
goto Cleanup;
|
|
}
|
|
|
|
Error = ERROR_SUCCESS;
|
|
|
|
Cleanup:
|
|
|
|
RpcRevertToSelf();
|
|
|
|
return( Error );
|
|
}
|
|
|
|
DWORD
|
|
INetAccessCheck(
|
|
IN PSECURITY_DESCRIPTOR SecurityDescriptor,
|
|
IN ACCESS_MASK DesiredAccess,
|
|
IN PGENERIC_MAPPING GenericMapping
|
|
)
|
|
/*++
|
|
|
|
Routine Description:
|
|
|
|
This function impersonates the caller so that it can perform access
|
|
validation using NtAccessCheck; and reverts back to
|
|
itself before returning.
|
|
|
|
This routine differs from NetpAccessCheckAndAudit in that it doesn't require
|
|
the caller to have SE_AUDIT_PRIVILEGE nor does it generate audits.
|
|
That is typically fine since the passed in security descriptor typically doesn't
|
|
have a SACL requesting an audit.
|
|
|
|
Arguments:
|
|
|
|
SecurityDescriptor - A pointer to the Security Descriptor against which
|
|
acccess is to be checked.
|
|
|
|
DesiredAccess - Supplies desired acccess mask. This mask must have been
|
|
previously mapped to contain no generic accesses.
|
|
|
|
GenericMapping - Supplies a pointer to the generic mapping associated
|
|
with this object type.
|
|
|
|
Return Value:
|
|
|
|
NET_API_STATUS - NERR_Success or reason for failure.
|
|
|
|
--*/
|
|
{
|
|
DWORD Error;
|
|
|
|
HANDLE ClientToken = NULL;
|
|
|
|
DWORD GrantedAccess;
|
|
BOOL AccessStatus;
|
|
BYTE PrivilegeSet[500]; // Large buffer
|
|
|
|
DWORD PrivilegeSetSize;
|
|
|
|
|
|
//
|
|
// Impersonate the client.
|
|
//
|
|
|
|
Error = RpcImpersonateClient(NULL);
|
|
|
|
if ( Error != ERROR_SUCCESS ) {
|
|
|
|
return( Error );
|
|
}
|
|
|
|
//
|
|
// Open the impersonated token.
|
|
//
|
|
|
|
if ( OpenThreadToken(
|
|
GetCurrentThread(),
|
|
TOKEN_QUERY,
|
|
TRUE, // use process security context to open token
|
|
&ClientToken ) == FALSE ) {
|
|
|
|
Error = GetLastError();
|
|
goto Cleanup;
|
|
}
|
|
|
|
//
|
|
// Check if the client has the required access.
|
|
//
|
|
|
|
PrivilegeSetSize = sizeof(PrivilegeSet);
|
|
if ( AccessCheck(
|
|
SecurityDescriptor,
|
|
ClientToken,
|
|
DesiredAccess,
|
|
GenericMapping,
|
|
(PPRIVILEGE_SET)&PrivilegeSet,
|
|
&PrivilegeSetSize,
|
|
&GrantedAccess,
|
|
&AccessStatus ) == FALSE ) {
|
|
|
|
Error = GetLastError();
|
|
goto Cleanup;
|
|
|
|
}
|
|
|
|
if ( AccessStatus == FALSE ) {
|
|
|
|
Error = ERROR_ACCESS_DENIED;
|
|
goto Cleanup;
|
|
}
|
|
|
|
//
|
|
// Success
|
|
//
|
|
|
|
Error = ERROR_SUCCESS;
|
|
|
|
Cleanup:
|
|
|
|
RpcRevertToSelf();
|
|
|
|
if ( ClientToken != NULL ) {
|
|
CloseHandle( ClientToken );
|
|
}
|
|
|
|
return( Error );
|
|
}
|
|
|