rapid7/metasploit-framework

//  Copyright 2015 Google Inc. All Rights Reserved.
//
//  Licensed under the Apache License, Version 2.0 (the "License");
//  you may not use this file except in compliance with the License.
//  You may obtain a copy of the License at
//
//  http ://www.apache.org/licenses/LICENSE-2.0
//
//  Unless required by applicable law or agreed to in writing, software
//  distributed under the License is distributed on an "AS IS" BASIS,
//  WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
//  See the License for the specific language governing permissions and
//  limitations under the License.

#include "stdafx.h"
#include "CommonUtils.h"
#include "ntimports.h"

HANDLE CreateSymlink(HANDLE root, LPCWSTR linkname, LPCWSTR targetname)
{
    DEFINE_NTDLL(RtlInitUnicodeString);
    DEFINE_NTDLL(NtCreateSymbolicLinkObject);
    
    OBJECT_ATTRIBUTES objAttr;
    UNICODE_STRING name;
    UNICODE_STRING target;

    fRtlInitUnicodeString(&name, linkname);
    fRtlInitUnicodeString(&target, targetname);

    InitializeObjectAttributes(&objAttr, &name, OBJ_CASE_INSENSITIVE, root, nullptr);    

    HANDLE hLink;

    NTSTATUS status = fNtCreateSymbolicLinkObject(&hLink, 
        SYMBOLIC_LINK_ALL_ACCESS, &objAttr, &target);
    if (status == 0)
    {
        //DebugPrintf("Opened Link %ls -> %ls: %p\n", linkname, targetname, hLink);
        return hLink;
    }
    else
    {
        SetLastError(NtStatusToDosError(status));
        return nullptr;
    }
}

HANDLE OpenSymlink(HANDLE root, LPCWSTR linkname)
{
    DEFINE_NTDLL(RtlInitUnicodeString);
    DEFINE_NTDLL(NtOpenSymbolicLinkObject);

    OBJECT_ATTRIBUTES objAttr;
    UNICODE_STRING name;    

    fRtlInitUnicodeString(&name, linkname);    

    InitializeObjectAttributes(&objAttr, &name, OBJ_CASE_INSENSITIVE, root, nullptr);

    HANDLE hLink;

    NTSTATUS status = fNtOpenSymbolicLinkObject(&hLink,
        SYMBOLIC_LINK_ALL_ACCESS, &objAttr);
    if (status == 0)
    {        
        return hLink;
    }
    else
    {
        SetLastError(NtStatusToDosError(status));
        return nullptr;
    }
}