reactos/lib/rtl/bootdata.c
Jérôme Gardou 4553986560 Sync with trunk (r48008)
Bets are open : will this break anything?

svn path=/branches/reactos-yarotows/; revision=48024
2010-07-13 17:46:03 +00:00

730 lines
21 KiB
C

/* COPYRIGHT: See COPYING in the top level directory
* PROJECT: ReactOS system libraries
* PURPOSE: Boot Data implementation
* FILE: lib/rtl/bootdata.c
* PROGRAMMERS:
*/
/* INCLUDES *****************************************************************/
#include <rtl.h>
#define NDEBUG
#include <debug.h>
/* FUNCTIONS *****************************************************************/
static SID_IDENTIFIER_AUTHORITY LocalSystemAuthority = {SECURITY_NT_AUTHORITY};
static NTSTATUS
RtlpSysVolCreateSecurityDescriptor(OUT PISECURITY_DESCRIPTOR *SecurityDescriptor,
OUT PSID *SystemSid)
{
PSECURITY_DESCRIPTOR AbsSD = NULL;
PSID LocalSystemSid = NULL;
PACL Dacl = NULL;
ULONG DaclSize;
NTSTATUS Status;
/* create the local SYSTEM SID */
Status = RtlAllocateAndInitializeSid(&LocalSystemAuthority,
1,
SECURITY_LOCAL_SYSTEM_RID,
0,
0,
0,
0,
0,
0,
0,
&LocalSystemSid);
if (!NT_SUCCESS(Status))
{
return Status;
}
/* allocate and initialize the security descriptor */
AbsSD = RtlpAllocateMemory(sizeof(SECURITY_DESCRIPTOR),
'dSeS');
if (AbsSD == NULL)
{
Status = STATUS_NO_MEMORY;
goto Cleanup;
}
Status = RtlCreateSecurityDescriptor(AbsSD,
SECURITY_DESCRIPTOR_REVISION);
if (!NT_SUCCESS(Status))
{
goto Cleanup;
}
/* allocate and create the DACL */
DaclSize = sizeof(ACL) + sizeof(ACE) +
RtlLengthSid(LocalSystemSid);
Dacl = RtlpAllocateMemory(DaclSize,
'cAeS');
if (Dacl == NULL)
{
Status = STATUS_NO_MEMORY;
goto Cleanup;
}
Status = RtlCreateAcl(Dacl,
DaclSize,
ACL_REVISION);
if (!NT_SUCCESS(Status))
{
goto Cleanup;
}
Status = RtlAddAccessAllowedAceEx(Dacl,
ACL_REVISION,
OBJECT_INHERIT_ACE | CONTAINER_INHERIT_ACE,
STANDARD_RIGHTS_ALL | SPECIFIC_RIGHTS_ALL,
LocalSystemSid);
if (!NT_SUCCESS(Status))
{
goto Cleanup;
}
/* set the DACL in the security descriptor */
Status = RtlSetDaclSecurityDescriptor(AbsSD,
TRUE,
Dacl,
FALSE);
/* all done */
if (NT_SUCCESS(Status))
{
*SecurityDescriptor = AbsSD;
*SystemSid = LocalSystemSid;
}
else
{
Cleanup:
if (LocalSystemSid != NULL)
{
RtlFreeSid(LocalSystemSid);
}
if (Dacl != NULL)
{
RtlpFreeMemory(Dacl,
'cAeS');
}
if (AbsSD != NULL)
{
RtlpFreeMemory(AbsSD,
'dSeS');
}
}
return Status;
}
static NTSTATUS
RtlpSysVolCheckOwnerAndSecurity(IN HANDLE DirectoryHandle,
IN PISECURITY_DESCRIPTOR SecurityDescriptor)
{
PSECURITY_DESCRIPTOR RelSD = NULL;
PSECURITY_DESCRIPTOR NewRelSD = NULL;
PSECURITY_DESCRIPTOR AbsSD = NULL;
#ifdef _WIN64
BOOLEAN AbsSDAllocated = FALSE;
#endif
PSID AdminSid = NULL;
PSID LocalSystemSid = NULL;
ULONG DescriptorSize;
ULONG AbsSDSize, RelSDSize = 0;
PACL Dacl;
BOOLEAN DaclPresent, DaclDefaulted;
PSID OwnerSid;
BOOLEAN OwnerDefaulted;
ULONG AceIndex;
PACE Ace = NULL;
NTSTATUS Status;
/* find out how much memory we need to allocate for the self-relative
descriptor we're querying */
Status = ZwQuerySecurityObject(DirectoryHandle,
OWNER_SECURITY_INFORMATION | DACL_SECURITY_INFORMATION,
NULL,
0,
&DescriptorSize);
if (Status != STATUS_BUFFER_TOO_SMALL)
{
/* looks like the FS doesn't support security... return success */
Status = STATUS_SUCCESS;
goto Cleanup;
}
/* allocate enough memory for the security descriptor */
RelSD = RtlpAllocateMemory(DescriptorSize,
'dSeS');
if (RelSD == NULL)
{
Status = STATUS_NO_MEMORY;
goto Cleanup;
}
/* query the self-relative security descriptor */
Status = ZwQuerySecurityObject(DirectoryHandle,
OWNER_SECURITY_INFORMATION | DACL_SECURITY_INFORMATION,
RelSD,
DescriptorSize,
&DescriptorSize);
if (!NT_SUCCESS(Status))
{
/* FIXME - handle the case where someone else modified the owner and/or
DACL while we allocated memory. But that should be *very*
unlikely.... */
goto Cleanup;
}
/* query the owner and DACL from the descriptor */
Status = RtlGetOwnerSecurityDescriptor(RelSD,
&OwnerSid,
&OwnerDefaulted);
if (!NT_SUCCESS(Status))
{
goto Cleanup;
}
Status = RtlGetDaclSecurityDescriptor(RelSD,
&DaclPresent,
&Dacl,
&DaclDefaulted);
if (!NT_SUCCESS(Status))
{
goto Cleanup;
}
/* create the Administrators SID */
Status = RtlAllocateAndInitializeSid(&LocalSystemAuthority,
2,
SECURITY_BUILTIN_DOMAIN_RID,
DOMAIN_ALIAS_RID_ADMINS,
0,
0,
0,
0,
0,
0,
&AdminSid);
if (!NT_SUCCESS(Status))
{
goto Cleanup;
}
/* create the local SYSTEM SID */
Status = RtlAllocateAndInitializeSid(&LocalSystemAuthority,
1,
SECURITY_LOCAL_SYSTEM_RID,
0,
0,
0,
0,
0,
0,
0,
&LocalSystemSid);
if (!NT_SUCCESS(Status))
{
goto Cleanup;
}
/* check if the Administrators are the owner and at least a not-NULL DACL
is present */
if (OwnerSid != NULL &&
RtlEqualSid(OwnerSid,
AdminSid) &&
DaclPresent && Dacl != NULL)
{
/* check the DACL for an Allowed ACE for the SYSTEM account */
AceIndex = 0;
do
{
Status = RtlGetAce(Dacl,
AceIndex++,
(PVOID*)&Ace);
if (!NT_SUCCESS(Status))
{
Ace = NULL;
}
else if (Ace != NULL && Ace->Header.AceType == ACCESS_ALLOWED_ACE_TYPE)
{
/* check if the the ACE is a set of allowed permissions for the
local SYSTEM account */
if (RtlEqualSid((PSID)(Ace + 1),
LocalSystemSid))
{
/* check if the ACE is inherited by noncontainer and
container objects, if not attempt to change that */
if (!(Ace->Header.AceFlags & OBJECT_INHERIT_ACE) ||
!(Ace->Header.AceFlags & CONTAINER_INHERIT_ACE))
{
Ace->Header.AceFlags |= OBJECT_INHERIT_ACE | CONTAINER_INHERIT_ACE;
Status = ZwSetSecurityObject(DirectoryHandle,
DACL_SECURITY_INFORMATION,
RelSD);
}
else
{
/* all done, we have access */
Status = STATUS_SUCCESS;
}
goto Cleanup;
}
}
} while (Ace != NULL);
}
AbsSDSize = DescriptorSize;
/* because we need to change any existing data we need to convert it to
an absolute security descriptor first */
Status = RtlSelfRelativeToAbsoluteSD2(RelSD,
&AbsSDSize);
#ifdef _WIN64
if (Status == STATUS_BUFFER_TOO_SMALL)
{
/* this error code can only be returned on 64 bit builds because
the size of an absolute security descriptor is greater than the
size of a self-relative security descriptor */
ASSERT(AbsSDSize > DescriptorSize);
AbsSD = RtlpAllocateMemory(DescriptorSize,
'dSeS');
if (AbsSD == NULL)
{
Status = STATUS_NO_MEMORY;
goto Cleanup;
}
AbsSDAllocated = TRUE;
/* make a raw copy of the self-relative descriptor */
RtlCopyMemory(AbsSD,
RelSD,
DescriptorSize);
/* finally convert it */
Status = RtlSelfRelativeToAbsoluteSD2(AbsSD,
&AbsSDSize);
}
else
#endif
{
AbsSD = RelSD;
}
if (!NT_SUCCESS(Status))
{
goto Cleanup;
}
/* set the owner SID */
Status = RtlSetOwnerSecurityDescriptor(AbsSD,
AdminSid,
FALSE);
if (!NT_SUCCESS(Status))
{
goto Cleanup;
}
/* set the DACL in the security descriptor */
Status = RtlSetDaclSecurityDescriptor(AbsSD,
TRUE,
SecurityDescriptor->Dacl,
FALSE);
if (!NT_SUCCESS(Status))
{
goto Cleanup;
}
/* convert it back to a self-relative descriptor, find out how much
memory we need */
Status = RtlAbsoluteToSelfRelativeSD(AbsSD,
NULL,
&RelSDSize);
if (Status != STATUS_BUFFER_TOO_SMALL)
{
goto Cleanup;
}
/* allocate enough memory for the new self-relative descriptor */
NewRelSD = RtlpAllocateMemory(RelSDSize,
'dSeS');
if (NewRelSD == NULL)
{
Status = STATUS_NO_MEMORY;
goto Cleanup;
}
/* convert the security descriptor to self-relative format */
Status = RtlAbsoluteToSelfRelativeSD(AbsSD,
NewRelSD,
&RelSDSize);
if (Status == STATUS_BUFFER_TOO_SMALL)
{
goto Cleanup;
}
/* finally attempt to change the security information */
Status = ZwSetSecurityObject(DirectoryHandle,
OWNER_SECURITY_INFORMATION | DACL_SECURITY_INFORMATION,
NewRelSD);
Cleanup:
if (AdminSid != NULL)
{
RtlFreeSid(AdminSid);
}
if (LocalSystemSid != NULL)
{
RtlFreeSid(LocalSystemSid);
}
if (RelSD != NULL)
{
RtlpFreeMemory(RelSD,
'dSeS');
}
if (NewRelSD != NULL)
{
RtlpFreeMemory(NewRelSD,
'dSeS');
}
#ifdef _WIN64
if (AbsSDAllocated)
{
RtlpFreeMemory(AbsSD,
'dSeS');
}
#endif
return Status;
}
static NTSTATUS
RtlpSysVolTakeOwnership(IN PUNICODE_STRING DirectoryPath,
IN PSECURITY_DESCRIPTOR SecurityDescriptor)
{
TOKEN_PRIVILEGES TokenPrivileges;
OBJECT_ATTRIBUTES ObjectAttributes;
SECURITY_DESCRIPTOR AbsSD;
PSID AdminSid = NULL;
IO_STATUS_BLOCK IoStatusBlock;
BOOLEAN TokenEnabled = FALSE;
HANDLE hToken = NULL;
HANDLE hDirectory = NULL;
NTSTATUS Status;
Status = ZwOpenProcessToken(NtCurrentProcess(),
TOKEN_QUERY | TOKEN_ADJUST_PRIVILEGES,
&hToken);
if (!NT_SUCCESS(Status))
{
goto Cleanup;
}
/* attempt to enable the SE_TAKE_OWNERSHIP_PRIVILEGE privilege */
TokenPrivileges.PrivilegeCount = 1;
TokenPrivileges.Privileges[0].Luid.LowPart = SE_TAKE_OWNERSHIP_PRIVILEGE;
TokenPrivileges.Privileges[0].Luid.HighPart = 0;
TokenPrivileges.Privileges[0].Attributes = SE_PRIVILEGE_ENABLED;
Status = ZwAdjustPrivilegesToken(hToken,
FALSE,
&TokenPrivileges,
sizeof(TokenPrivileges),
&TokenPrivileges,
NULL);
if (!NT_SUCCESS(Status))
{
goto Cleanup;
}
TokenEnabled = (TokenPrivileges.PrivilegeCount != 0);
/* open the directory */
InitializeObjectAttributes(&ObjectAttributes,
DirectoryPath,
0,
NULL,
SecurityDescriptor);
Status = ZwOpenFile(&hDirectory,
SYNCHRONIZE | WRITE_OWNER,
&ObjectAttributes,
&IoStatusBlock,
FILE_SHARE_READ | FILE_SHARE_WRITE | FILE_SHARE_DELETE,
FILE_DIRECTORY_FILE | FILE_SYNCHRONOUS_IO_NONALERT);
if (!NT_SUCCESS(Status))
{
goto Cleanup;
}
/* create the Administrators SID */
Status = RtlAllocateAndInitializeSid(&LocalSystemAuthority,
2,
SECURITY_BUILTIN_DOMAIN_RID,
DOMAIN_ALIAS_RID_ADMINS,
0,
0,
0,
0,
0,
0,
&AdminSid);
if (!NT_SUCCESS(Status))
{
goto Cleanup;
}
/* create the security descriptor */
Status = RtlCreateSecurityDescriptor(&AbsSD,
SECURITY_DESCRIPTOR_REVISION);
if (!NT_SUCCESS(Status))
{
goto Cleanup;
}
Status = RtlSetOwnerSecurityDescriptor(&AbsSD,
AdminSid,
FALSE);
if (!NT_SUCCESS(Status))
{
goto Cleanup;
}
/* attempt to take ownership */
Status = ZwSetSecurityObject(hDirectory,
OWNER_SECURITY_INFORMATION,
&AbsSD);
Cleanup:
if (TokenEnabled)
{
ZwAdjustPrivilegesToken(hToken,
FALSE,
&TokenPrivileges,
0,
NULL,
NULL);
}
if (AdminSid != NULL)
{
RtlFreeSid(AdminSid);
}
if (hDirectory != NULL)
{
ZwClose(hDirectory);
}
if (hToken != NULL)
{
ZwClose(hToken);
}
return Status;
}
/*
* @implemented
*/
NTSTATUS
NTAPI
RtlCreateSystemVolumeInformationFolder(
IN PUNICODE_STRING VolumeRootPath
)
{
OBJECT_ATTRIBUTES ObjectAttributes;
IO_STATUS_BLOCK IoStatusBlock;
HANDLE hDirectory;
UNICODE_STRING DirectoryName, NewPath;
ULONG PathLen;
PISECURITY_DESCRIPTOR SecurityDescriptor = NULL;
PSID SystemSid = NULL;
BOOLEAN AddSep = FALSE;
NTSTATUS Status;
PAGED_CODE_RTL();
RtlInitUnicodeString(&DirectoryName,
L"System Volume Information");
PathLen = VolumeRootPath->Length + DirectoryName.Length;
/* make sure we don't overflow while appending the strings */
if (PathLen > 0xFFFC)
{
return STATUS_INVALID_PARAMETER;
}
if (VolumeRootPath->Buffer[(VolumeRootPath->Length / sizeof(WCHAR)) - 1] != L'\\')
{
AddSep = TRUE;
PathLen += sizeof(WCHAR);
}
/* allocate the new string */
NewPath.MaximumLength = (USHORT)PathLen + sizeof(WCHAR);
NewPath.Buffer = RtlpAllocateStringMemory(NewPath.MaximumLength,
TAG_USTR);
if (NewPath.Buffer == NULL)
{
return STATUS_INSUFFICIENT_RESOURCES;
}
/* create the new path string */
NewPath.Length = VolumeRootPath->Length;
RtlCopyMemory(NewPath.Buffer,
VolumeRootPath->Buffer,
NewPath.Length);
if (AddSep)
{
NewPath.Buffer[NewPath.Length / sizeof(WCHAR)] = L'\\';
NewPath.Length += sizeof(WCHAR);
}
RtlCopyMemory(NewPath.Buffer + (NewPath.Length / sizeof(WCHAR)),
DirectoryName.Buffer,
DirectoryName.Length);
NewPath.Length += DirectoryName.Length;
NewPath.Buffer[NewPath.Length / sizeof(WCHAR)] = L'\0';
ASSERT(NewPath.Length == PathLen);
ASSERT(NewPath.Length == NewPath.MaximumLength - sizeof(WCHAR));
/* create the security descriptor for the new directory */
Status = RtlpSysVolCreateSecurityDescriptor(&SecurityDescriptor,
&SystemSid);
if (NT_SUCCESS(Status))
{
/* create or open the directory */
InitializeObjectAttributes(&ObjectAttributes,
&NewPath,
0,
NULL,
SecurityDescriptor);
Status = ZwCreateFile(&hDirectory,
SYNCHRONIZE | WRITE_OWNER | WRITE_DAC | READ_CONTROL,
&ObjectAttributes,
&IoStatusBlock,
NULL,
FILE_ATTRIBUTE_SYSTEM | FILE_ATTRIBUTE_HIDDEN,
FILE_SHARE_READ | FILE_SHARE_WRITE | FILE_SHARE_DELETE,
FILE_OPEN_IF,
FILE_DIRECTORY_FILE | FILE_SYNCHRONOUS_IO_NONALERT,
NULL,
0);
if (!NT_SUCCESS(Status))
{
Status = RtlpSysVolTakeOwnership(&NewPath,
SecurityDescriptor);
if (NT_SUCCESS(Status))
{
/* successfully took ownership, attempt to open it */
Status = ZwCreateFile(&hDirectory,
SYNCHRONIZE | WRITE_OWNER | WRITE_DAC | READ_CONTROL,
&ObjectAttributes,
&IoStatusBlock,
NULL,
FILE_ATTRIBUTE_SYSTEM | FILE_ATTRIBUTE_HIDDEN,
FILE_SHARE_READ | FILE_SHARE_WRITE | FILE_SHARE_DELETE,
FILE_OPEN_IF,
FILE_DIRECTORY_FILE | FILE_SYNCHRONOUS_IO_NONALERT,
NULL,
0);
}
}
if (NT_SUCCESS(Status))
{
/* check security now and adjust it if neccessary */
Status = RtlpSysVolCheckOwnerAndSecurity(hDirectory,
SecurityDescriptor);
ZwClose(hDirectory);
}
/* free allocated memory */
ASSERT(SecurityDescriptor != NULL);
ASSERT(SecurityDescriptor->Dacl != NULL);
RtlpFreeMemory(SecurityDescriptor->Dacl,
'cAeS');
RtlpFreeMemory(SecurityDescriptor,
'dSeS');
RtlFreeSid(SystemSid);
}
RtlpFreeStringMemory(NewPath.Buffer,
TAG_USTR);
return Status;
}
/*
* @unimplemented
*/
NTSTATUS
NTAPI
RtlCreateBootStatusDataFile(VOID)
{
UNIMPLEMENTED;
return STATUS_NOT_IMPLEMENTED;
}
/*
* @unimplemented
*/
NTSTATUS
NTAPI
RtlGetSetBootStatusData(
HANDLE Filehandle,
BOOLEAN WriteMode,
DWORD DataClass,
PVOID Buffer,
ULONG BufferSize,
DWORD DataClass2
)
{
UNIMPLEMENTED;
return STATUS_NOT_IMPLEMENTED;
}
/*
* @unimplemented
*/
NTSTATUS
NTAPI
RtlLockBootStatusData(
HANDLE Filehandle
)
{
UNIMPLEMENTED;
return STATUS_NOT_IMPLEMENTED;
}
/*
* @unimplemented
*/
NTSTATUS
NTAPI
RtlUnlockBootStatusData(
HANDLE Filehandle
)
{
UNIMPLEMENTED;
return STATUS_NOT_IMPLEMENTED;
}
/* EOF */