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dll: fuse: use -ouid=-1,gid=-1 to specify user/group who mounted file system

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This commit is contained in:
Bill Zissimopoulos
2017-02-02 17:06:10 -08:00
parent 25b3e111fa
commit 0c945b67f3
3 changed files with 165 additions and 68 deletions
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206
src/dll/fuse/fuse_intf.c
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@ -116,19 +116,6 @@ NTSTATUS fsp_fuse_op_enter(FSP_FILE_SYSTEM *FileSystem,
PWSTR FileName = 0, Suffix;
WCHAR Root[2] = L"\\";
HANDLE Token = 0;
union
{
TOKEN_USER V;
UINT8 B[128];
} UserInfoBuf;
PTOKEN_USER UserInfo = &UserInfoBuf.V;
union
{
TOKEN_PRIMARY_GROUP V;
UINT8 B[128];
} GroupInfoBuf;
PTOKEN_PRIMARY_GROUP GroupInfo = &GroupInfoBuf.V;
DWORD Size;
NTSTATUS Result;
if (FspFsctlTransactCreateKind == Request->Kind)
@ -157,55 +144,7 @@ NTSTATUS fsp_fuse_op_enter(FSP_FILE_SYSTEM *FileSystem,
if (0 != Token)
{
if (!GetTokenInformation(Token, TokenUser, UserInfo, sizeof UserInfoBuf, &Size))
{
if (ERROR_INSUFFICIENT_BUFFER != GetLastError())
{
Result = FspNtStatusFromWin32(GetLastError());
goto exit;
}
UserInfo = MemAlloc(Size);
if (0 == UserInfo)
{
Result = STATUS_INSUFFICIENT_RESOURCES;
goto exit;
}
if (!GetTokenInformation(Token, TokenUser, UserInfo, Size, &Size))
{
Result = FspNtStatusFromWin32(GetLastError());
goto exit;
}
}
if (!GetTokenInformation(Token, TokenPrimaryGroup, GroupInfo, sizeof GroupInfoBuf, &Size))
{
if (ERROR_INSUFFICIENT_BUFFER != GetLastError())
{
Result = FspNtStatusFromWin32(GetLastError());
goto exit;
}
GroupInfo = MemAlloc(Size);
if (0 == UserInfo)
{
Result = STATUS_INSUFFICIENT_RESOURCES;
goto exit;
}
if (!GetTokenInformation(Token, TokenPrimaryGroup, GroupInfo, Size, &Size))
{
Result = FspNtStatusFromWin32(GetLastError());
goto exit;
}
}
Result = FspPosixMapSidToUid(UserInfo->User.Sid, &Uid);
if (!NT_SUCCESS(Result))
goto exit;
Result = FspPosixMapSidToUid(GroupInfo->PrimaryGroup, &Gid);
Result = fsp_fuse_get_token_uidgid(Token, TokenUser, &Uid, &Gid);
if (!NT_SUCCESS(Result))
goto exit;
}
@ -230,12 +169,6 @@ NTSTATUS fsp_fuse_op_enter(FSP_FILE_SYSTEM *FileSystem,
Result = STATUS_SUCCESS;
exit:
if (UserInfo != &UserInfoBuf.V)
MemFree(UserInfo);
if (GroupInfo != &GroupInfoBuf.V)
MemFree(GroupInfo);
if (!NT_SUCCESS(Result) && 0 != PosixPath)
FspPosixDeletePath(PosixPath);
@ -2062,3 +1995,140 @@ FSP_FILE_SYSTEM_INTERFACE fsp_fuse_intf =
fsp_fuse_intf_SetReparsePoint,
fsp_fuse_intf_DeleteReparsePoint,
};
/*
* Utility
*/
NTSTATUS fsp_fuse_get_token_uidgid(
HANDLE Token,
TOKEN_INFORMATION_CLASS UserOrOwnerClass, /* TokenUser|TokenOwner */
PUINT32 PUid, PUINT32 PGid)
{
UINT32 Uid, Gid;
union
{
TOKEN_USER V;
UINT8 B[128];
} UserInfoBuf;
PTOKEN_USER UserInfo = &UserInfoBuf.V;
union
{
TOKEN_OWNER V;
UINT8 B[128];
} OwnerInfoBuf;
PTOKEN_OWNER OwnerInfo = &OwnerInfoBuf.V;
union
{
TOKEN_PRIMARY_GROUP V;
UINT8 B[128];
} GroupInfoBuf;
PTOKEN_PRIMARY_GROUP GroupInfo = &GroupInfoBuf.V;
DWORD Size;
NTSTATUS Result;
if (0 != PUid && TokenUser == UserOrOwnerClass)
{
if (!GetTokenInformation(Token, TokenUser, UserInfo, sizeof UserInfoBuf, &Size))
{
if (ERROR_INSUFFICIENT_BUFFER != GetLastError())
{
Result = FspNtStatusFromWin32(GetLastError());
goto exit;
}
UserInfo = MemAlloc(Size);
if (0 == UserInfo)
{
Result = STATUS_INSUFFICIENT_RESOURCES;
goto exit;
}
if (!GetTokenInformation(Token, TokenUser, UserInfo, Size, &Size))
{
Result = FspNtStatusFromWin32(GetLastError());
goto exit;
}
}
Result = FspPosixMapSidToUid(UserInfo->User.Sid, &Uid);
if (!NT_SUCCESS(Result))
goto exit;
}
else if (0 != PUid && TokenOwner == UserOrOwnerClass)
{
if (!GetTokenInformation(Token, TokenOwner, OwnerInfo, sizeof OwnerInfoBuf, &Size))
{
if (ERROR_INSUFFICIENT_BUFFER != GetLastError())
{
Result = FspNtStatusFromWin32(GetLastError());
goto exit;
}
OwnerInfo = MemAlloc(Size);
if (0 == OwnerInfo)
{
Result = STATUS_INSUFFICIENT_RESOURCES;
goto exit;
}
if (!GetTokenInformation(Token, TokenOwner, OwnerInfo, Size, &Size))
{
Result = FspNtStatusFromWin32(GetLastError());
goto exit;
}
}
Result = FspPosixMapSidToUid(OwnerInfo->Owner, &Uid);
if (!NT_SUCCESS(Result))
goto exit;
}
if (0 != PGid)
{
if (!GetTokenInformation(Token, TokenPrimaryGroup, GroupInfo, sizeof GroupInfoBuf, &Size))
{
if (ERROR_INSUFFICIENT_BUFFER != GetLastError())
{
Result = FspNtStatusFromWin32(GetLastError());
goto exit;
}
GroupInfo = MemAlloc(Size);
if (0 == GroupInfo)
{
Result = STATUS_INSUFFICIENT_RESOURCES;
goto exit;
}
if (!GetTokenInformation(Token, TokenPrimaryGroup, GroupInfo, Size, &Size))
{
Result = FspNtStatusFromWin32(GetLastError());
goto exit;
}
}
Result = FspPosixMapSidToUid(GroupInfo->PrimaryGroup, &Gid);
if (!NT_SUCCESS(Result))
goto exit;
}
if (0 != PUid)
*PUid = Uid;
if (0 != PGid)
*PGid = Gid;
Result = STATUS_SUCCESS;
exit:
if (UserInfo != &UserInfoBuf.V)
MemFree(UserInfo);
if (OwnerInfo != &OwnerInfoBuf.V)
MemFree(OwnerInfo);
if (GroupInfo != &GroupInfoBuf.V)
MemFree(GroupInfo);
return Result;
}