mirror-processhacker/2.x/trunk/phlib/native.c

/*
 * Process Hacker - 
 *   native support functions
 * 
 * Copyright (C) 2009-2011 wj32
 * 
 * This file is part of Process Hacker.
 * 
 * Process Hacker is free software; you can redistribute it and/or modify
 * it under the terms of the GNU General Public License as published by
 * the Free Software Foundation, either version 3 of the License, or
 * (at your option) any later version.
 *
 * Process Hacker is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 * GNU General Public License for more details.
 *
 * You should have received a copy of the GNU General Public License
 * along with Process Hacker.  If not, see <http://www.gnu.org/licenses/>.
 */

#include <ph.h>
#include <kphuser.h>
#include <symprv.h>

#define PH_DEVICE_PREFIX_LENGTH 64
#define PH_DEVICE_MUP_PREFIX_MAX_COUNT 16

typedef BOOLEAN (NTAPI *PPHP_ENUM_PROCESS_MODULES_CALLBACK)(
    __in HANDLE ProcessHandle,
    __in PLDR_DATA_TABLE_ENTRY Entry,
    __in PVOID AddressOfEntry,
    __in_opt PVOID Context1,
    __in_opt PVOID Context2
    );

typedef BOOLEAN (NTAPI *PPHP_ENUM_PROCESS_MODULES32_CALLBACK)(
    __in HANDLE ProcessHandle,
    __in PLDR_DATA_TABLE_ENTRY32 Entry,
    __in ULONG AddressOfEntry,
    __in_opt PVOID Context1,
    __in_opt PVOID Context2
    );

static PH_INITONCE PhDevicePrefixesInitOnce = PH_INITONCE_INIT;

static PH_STRINGREF PhDevicePrefixes[26];
static PH_QUEUED_LOCK PhDevicePrefixesLock = PH_QUEUED_LOCK_INIT;

static PPH_STRING PhDeviceMupPrefixes[PH_DEVICE_MUP_PREFIX_MAX_COUNT] = { 0 };
static ULONG PhDeviceMupPrefixesCount = 0;
static PH_QUEUED_LOCK PhDeviceMupPrefixesLock = PH_QUEUED_LOCK_INIT;

static PH_INITONCE PhPredefineKeyInitOnce = PH_INITONCE_INIT;
static PH_STRINGREF PhPredefineKeyNames[PH_KEY_MAXIMUM_PREDEFINE] =
{
    PH_STRINGREF_INIT(L"\\Registry\\Machine"),
    PH_STRINGREF_INIT(L"\\Registry\\User"),
    PH_STRINGREF_INIT(L"\\Registry\\Machine\\Software\\Classes"),
    { 0, 0, NULL }
};
static HANDLE PhPredefineKeyHandles[PH_KEY_MAXIMUM_PREDEFINE] = { 0 };

/**
 * Opens a process.
 *
 * \param ProcessHandle A variable which receives a handle to the process.
 * \param DesiredAccess The desired access to the process.
 * \param ProcessId The ID of the process.
 */
NTSTATUS PhOpenProcess(
    __out PHANDLE ProcessHandle,
    __in ACCESS_MASK DesiredAccess,
    __in HANDLE ProcessId
    )
{
    OBJECT_ATTRIBUTES objectAttributes = { 0 };
    CLIENT_ID clientId;

    clientId.UniqueProcess = ProcessId;
    clientId.UniqueThread = NULL;

    if (PhKphHandle)
    {
        return KphOpenProcess(
            PhKphHandle,
            ProcessHandle,
            DesiredAccess,
            &clientId
            );
    }
    else
    {

        return NtOpenProcess(
            ProcessHandle,
            DesiredAccess,
            &objectAttributes,
            &clientId
            );
    }
}

/**
 * Opens a thread.
 *
 * \param ThreadHandle A variable which receives a handle to the thread.
 * \param DesiredAccess The desired access to the thread.
 * \param ThreadId The ID of the thread.
 */
NTSTATUS PhOpenThread(
    __out PHANDLE ThreadHandle,
    __in ACCESS_MASK DesiredAccess,
    __in HANDLE ThreadId
    )
{
    OBJECT_ATTRIBUTES objectAttributes = { 0 };
    CLIENT_ID clientId;

    clientId.UniqueProcess = NULL;
    clientId.UniqueThread = ThreadId;

    if (PhKphHandle)
    {
        return KphOpenThread(
            PhKphHandle,
            ThreadHandle,
            DesiredAccess,
            &clientId
            );
    }
    else
    {
        return NtOpenThread(
            ThreadHandle,
            DesiredAccess,
            &objectAttributes,
            &clientId
            );
    }
}

NTSTATUS PhOpenThreadProcess(
    __out PHANDLE ProcessHandle,
    __in ACCESS_MASK DesiredAccess,
    __in HANDLE ThreadHandle
    )
{
    if (PhKphHandle)
    {
        return KphOpenThreadProcess(
            PhKphHandle,
            ThreadHandle,
            DesiredAccess,
            ProcessHandle
            );
    }
    else
    {
        NTSTATUS status;
        THREAD_BASIC_INFORMATION basicInfo;

        if (!NT_SUCCESS(status = PhGetThreadBasicInformation(
            ThreadHandle,
            &basicInfo
            )))
            return status;

        return PhOpenProcess(
            ProcessHandle,
            DesiredAccess,
            basicInfo.ClientId.UniqueProcess
            );
    }
}

/**
 * Opens a process token.
 *
 * \param TokenHandle A variable which receives a handle to the token.
 * \param DesiredAccess The desired access to the token.
 * \param ProcessHandle A handle to a process.
 */
NTSTATUS PhOpenProcessToken(
    __out PHANDLE TokenHandle,
    __in ACCESS_MASK DesiredAccess,
    __in HANDLE ProcessHandle
    )
{
    if (PhKphHandle)
    {
        return KphOpenProcessToken(
            PhKphHandle,
            ProcessHandle,
            DesiredAccess,
            TokenHandle
            );
    }
    else
    {
        return NtOpenProcessToken(
            ProcessHandle,
            DesiredAccess,
            TokenHandle
            );
    }
}

/**
 * Opens a thread token.
 *
 * \param TokenHandle A variable which receives a handle to the token.
 * \param DesiredAccess The desired access to the token.
 * \param ThreadHandle A handle to a thread.
 * \param OpenAsSelf TRUE to use the primary token for access checks, 
 * FALSE to use the impersonation token.
 */
NTSTATUS PhOpenThreadToken(
    __out PHANDLE TokenHandle,
    __in ACCESS_MASK DesiredAccess,
    __in HANDLE ThreadHandle,
    __in BOOLEAN OpenAsSelf
    )
{
    return NtOpenThreadToken(
        ThreadHandle,
        DesiredAccess,
        OpenAsSelf,
        TokenHandle
        );
}

NTSTATUS PhGetObjectSecurity(
    __in HANDLE Handle,
    __in SECURITY_INFORMATION SecurityInformation,
    __out PSECURITY_DESCRIPTOR *SecurityDescriptor
    )
{
    NTSTATUS status;
    ULONG bufferSize;
    PVOID buffer;

    bufferSize = 0x100;
    buffer = PhAllocate(bufferSize);

    status = NtQuerySecurityObject(
        Handle,
        SecurityInformation,
        buffer,
        bufferSize,
        &bufferSize
        );

    if (status == STATUS_BUFFER_TOO_SMALL)
    {
        PhFree(buffer);
        buffer = PhAllocate(bufferSize);

        status = NtQuerySecurityObject(
            Handle,
            SecurityInformation,
            buffer,
            bufferSize,
            &bufferSize
            );
    }

    if (!NT_SUCCESS(status))
    {
        PhFree(buffer);
        return status;
    }

    *SecurityDescriptor = (PSECURITY_DESCRIPTOR)buffer;

    return status;
}

NTSTATUS PhSetObjectSecurity(
    __in HANDLE Handle,
    __in SECURITY_INFORMATION SecurityInformation,
    __in PSECURITY_DESCRIPTOR SecurityDescriptor
    )
{
    return NtSetSecurityObject(
        Handle,
        SecurityInformation,
        SecurityDescriptor
        );
}

/**
 * Terminates a process.
 *
 * \param ProcessHandle A handle to a process. The handle must 
 * have PROCESS_TERMINATE access.
 * \param ExitStatus A status value that indicates why the 
 * process is being terminated.
 */
NTSTATUS PhTerminateProcess(
    __in HANDLE ProcessHandle,
    __in NTSTATUS ExitStatus
    )
{
    NTSTATUS status;

    if (PhKphHandle)
    {
        status = KphTerminateProcess(
            PhKphHandle,
            ProcessHandle,
            ExitStatus
            );

        if (status != STATUS_NOT_SUPPORTED)
            return status;
    }

    return NtTerminateProcess(
        ProcessHandle,
        ExitStatus
        );
}

/**
 * Suspends a process' threads.
 *
 * \param ProcessHandle A handle to a process. The handle must 
 * have PROCESS_SUSPEND_RESUME access.
 */
NTSTATUS PhSuspendProcess(
    __in HANDLE ProcessHandle
    )
{
    if (PhKphHandle && WINDOWS_HAS_PSSUSPENDRESUMEPROCESS)
    {
        return KphSuspendProcess(PhKphHandle, ProcessHandle);
    }
    else
    {
        return NtSuspendProcess(ProcessHandle);
    }
}

/**
 * Resumes a process' threads.
 *
 * \param ProcessHandle A handle to a process. The handle must 
 * have PROCESS_SUSPEND_RESUME access.
 */
NTSTATUS PhResumeProcess(
    __in HANDLE ProcessHandle
    )
{
    if (PhKphHandle && WINDOWS_HAS_PSSUSPENDRESUMEPROCESS)
    {
        return KphResumeProcess(PhKphHandle, ProcessHandle);
    }
    else
    {
        return NtResumeProcess(ProcessHandle);
    }
}

/**
 * Terminates a thread.
 *
 * \param ThreadHandle A handle to a thread. The handle must 
 * have THREAD_TERMINATE access.
 * \param ExitStatus A status value that indicates why the 
 * thread is being terminated.
 */
NTSTATUS PhTerminateThread(
    __in HANDLE ThreadHandle,
    __in NTSTATUS ExitStatus
    )
{
    NTSTATUS status;

    if (PhKphHandle)
    {
        status = KphTerminateThread(
            PhKphHandle,
            ThreadHandle,
            ExitStatus
            );

        if (status != STATUS_NOT_SUPPORTED)
            return status;
    }

    return NtTerminateThread(
        ThreadHandle,
        ExitStatus
        );
}

/**
 * Suspends a thread.
 *
 * \param ThreadHandle A handle to a thread. The handle must 
 * have THREAD_SUSPEND_RESUME access.
 * \param PreviousSuspendCount A variable which receives the 
 * number of times the thread had been suspended.
 */
NTSTATUS PhSuspendThread(
    __in HANDLE ThreadHandle,
    __out_opt PULONG PreviousSuspendCount
    )
{
    return NtSuspendThread(ThreadHandle, PreviousSuspendCount);
}

/**
 * Resumes a thread.
 *
 * \param ThreadHandle A handle to a thread. The handle must 
 * have THREAD_SUSPEND_RESUME access.
 * \param PreviousSuspendCount A variable which receives the 
 * number of times the thread had been suspended.
 */
NTSTATUS PhResumeThread(
    __in HANDLE ThreadHandle,
    __out_opt PULONG PreviousSuspendCount
    )
{
    return NtResumeThread(ThreadHandle, PreviousSuspendCount);
}

/**
 * Gets the processor context of a thread.
 *
 * \param ThreadHandle A handle to a thread. The handle must 
 * have THREAD_GET_CONTEXT access.
 * \param Context A variable which receives the context 
 * structure.
 */
NTSTATUS PhGetThreadContext(
    __in HANDLE ThreadHandle,
    __inout PCONTEXT Context
    )
{
    if (PhKphHandle)
    {
        return KphGetContextThread(PhKphHandle, ThreadHandle, Context);
    }
    else
    {
        return NtGetContextThread(ThreadHandle, Context);
    }
}

/**
 * Sets the processor context of a thread.
 *
 * \param ThreadHandle A handle to a thread. The handle must 
 * have THREAD_SET_CONTEXT access.
 * \param Context The new context structure.
 */
NTSTATUS PhSetThreadContext(
    __in HANDLE ThreadHandle,
    __in PCONTEXT Context
    )
{
    if (PhKphHandle)
    {
        return KphSetContextThread(PhKphHandle, ThreadHandle, Context);
    }
    else
    {
        return NtSetContextThread(ThreadHandle, Context);
    }
}

/**
 * Copies memory from another process into the current process.
 *
 * \param ProcessHandle A handle to a process. The handle must 
 * have PROCESS_VM_READ access.
 * \param BaseAddress The address from which memory is to be copied.
 * \param Buffer A buffer which receives the copied memory.
 * \param BufferSize The number of bytes to copy.
 * \param NumberOfBytesRead A variable which receives the number 
 * of bytes copied to the buffer.
 */
NTSTATUS PhReadVirtualMemory(
    __in HANDLE ProcessHandle,
    __in PVOID BaseAddress,
    __out_bcount(BufferSize) PVOID Buffer,
    __in SIZE_T BufferSize,
    __out_opt PSIZE_T NumberOfBytesRead
    )
{
    NTSTATUS status;

    // KphReadVirtualMemory is much slower than 
    // NtReadVirtualMemory, so we'll stick to 
    // the using the original system call whenever possible.

    status = NtReadVirtualMemory(
        ProcessHandle,
        BaseAddress,
        Buffer,
        BufferSize,
        NumberOfBytesRead
        );

    if (status == STATUS_ACCESS_DENIED && PhKphHandle && BufferSize <= MAXULONG32)
    {
        status = KphReadVirtualMemory(
            PhKphHandle,
            ProcessHandle,
            BaseAddress,
            Buffer,
            BufferSize,
            NumberOfBytesRead
            );
    }

    return status;
}

/**
 * Copies memory from the current process into another process.
 *
 * \param ProcessHandle A handle to a process. The handle must 
 * have PROCESS_VM_WRITE access.
 * \param BaseAddress The address to which memory is to be copied.
 * \param Buffer A buffer which contains the memory to copy.
 * \param BufferSize The number of bytes to copy.
 * \param NumberOfBytesWritten A variable which receives the number 
 * of bytes copied from the buffer.
 */
NTSTATUS PhWriteVirtualMemory(
    __in HANDLE ProcessHandle,
    __in PVOID BaseAddress,
    __in_bcount(BufferSize) PVOID Buffer,
    __in SIZE_T BufferSize,
    __out_opt PSIZE_T NumberOfBytesWritten
    )
{
    NTSTATUS status;

    status = NtWriteVirtualMemory(
        ProcessHandle,
        BaseAddress,
        Buffer,
        BufferSize,
        NumberOfBytesWritten
        );

    if (status == STATUS_ACCESS_DENIED && PhKphHandle && BufferSize <= MAXULONG32)
    {
        status = KphWriteVirtualMemory(
            PhKphHandle,
            ProcessHandle,
            BaseAddress,
            Buffer,
            BufferSize,
            NumberOfBytesWritten
            );
    }

    return status;
}

/**
 * Queries variable-sized information for a process.
 * The function allocates a buffer to contain the information.
 *
 * \param ProcessHandle A handle to a process. The access required 
 * depends on the information class specified.
 * \param ProcessInformationClass The information class to retrieve.
 * \param Buffer A variable which receives a pointer to a buffer 
 * containing the information. You must free the buffer using 
 * PhFree() when you no longer need it.
 */
NTSTATUS PhpQueryProcessVariableSize(
    __in HANDLE ProcessHandle,
    __in PROCESS_INFORMATION_CLASS ProcessInformationClass,
    __out PPVOID Buffer
    )
{
    NTSTATUS status;
    PVOID buffer;
    ULONG returnLength = 0;

    NtQueryInformationProcess(
        ProcessHandle,
        ProcessInformationClass,
        NULL,
        0,
        &returnLength
        );
    buffer = PhAllocate(returnLength);
    status = NtQueryInformationProcess(
        ProcessHandle,
        ProcessInformationClass,
        buffer,
        returnLength,
        &returnLength
        );

    if (NT_SUCCESS(status))
    {
        *Buffer = buffer;
    }
    else
    {
        PhFree(buffer);
    }

    return status;
}

/**
 * Gets the file name of the process' image.
 *
 * \param ProcessHandle A handle to a process. The handle must 
 * have PROCESS_QUERY_LIMITED_INFORMATION access.
 * \param FileName A variable which receives a pointer to a 
 * string containing the file name. You must free the string 
 * using PhDereferenceObject() when you no longer need it.
 */
NTSTATUS PhGetProcessImageFileName(
    __in HANDLE ProcessHandle,
    __out PPH_STRING *FileName
    )
{
    NTSTATUS status;
    PUNICODE_STRING fileName;

    status = PhpQueryProcessVariableSize(
        ProcessHandle,
        ProcessImageFileName,
        &fileName
        );

    if (!NT_SUCCESS(status))
        return status;

    *FileName = PhCreateStringEx(fileName->Buffer, fileName->Length);
    PhFree(fileName);

    return status;
}

/**
 * Gets the Win32 file name of the process' image.
 *
 * \param ProcessHandle A handle to a process. The handle must 
 * have PROCESS_QUERY_LIMITED_INFORMATION access.
 * \param FileName A variable which receives a pointer to a 
 * string containing the file name. You must free the string 
 * using PhDereferenceObject() when you no longer need it.
 *
 * \remarks This function is only available on Windows Vista 
 * and above.
 */
NTSTATUS PhGetProcessImageFileNameWin32(
    __in HANDLE ProcessHandle,
    __out PPH_STRING *FileName
    )
{
    NTSTATUS status;
    PUNICODE_STRING fileName;

    status = PhpQueryProcessVariableSize(
        ProcessHandle,
        ProcessImageFileNameWin32,
        &fileName
        );

    if (!NT_SUCCESS(status))
        return status;

    *FileName = PhCreateStringEx(fileName->Buffer, fileName->Length);
    PhFree(fileName);

    return status;
}

/**
 * Gets a string stored in a process' parameters structure.
 *
 * \param ProcessHandle A handle to a process. The handle must 
 * have PROCESS_QUERY_LIMITED_INFORMATION and PROCESS_VM_READ 
 * access.
 * \param Offset The string to retrieve.
 * \param String A variable which receives a pointer to the 
 * requested string. You must free the string using 
 * PhDereferenceObject() when you no longer need it.
 *
 * \retval STATUS_INVALID_PARAMETER_2 An invalid value was 
 * specified in the Offset parameter.
 */
NTSTATUS PhGetProcessPebString(
    __in HANDLE ProcessHandle,
    __in PH_PEB_OFFSET Offset,
    __out PPH_STRING *String
    )
{
    NTSTATUS status;
    PPH_STRING string;
    ULONG offset;

#define PEB_OFFSET_CASE(Enum, Field) \
    case Enum: offset = FIELD_OFFSET(RTL_USER_PROCESS_PARAMETERS, Field); break; \
    case Enum | PhpoWow64: offset = FIELD_OFFSET(RTL_USER_PROCESS_PARAMETERS32, Field); break

    switch (Offset)
    {
        PEB_OFFSET_CASE(PhpoCurrentDirectory, CurrentDirectory);
        PEB_OFFSET_CASE(PhpoDllPath, DllPath);
        PEB_OFFSET_CASE(PhpoImagePathName, ImagePathName);
        PEB_OFFSET_CASE(PhpoCommandLine, CommandLine);
        PEB_OFFSET_CASE(PhpoWindowTitle, WindowTitle);
        PEB_OFFSET_CASE(PhpoDesktopInfo, DesktopInfo);
        PEB_OFFSET_CASE(PhpoShellInfo, ShellInfo);
        PEB_OFFSET_CASE(PhpoRuntimeData, RuntimeData);
    default:
        return STATUS_INVALID_PARAMETER_2;
    }

    if (!(Offset & PhpoWow64))
    {
        PROCESS_BASIC_INFORMATION basicInfo;
        PVOID processParameters;
        UNICODE_STRING unicodeString;

        // Get the PEB address.
        if (!NT_SUCCESS(status = PhGetProcessBasicInformation(ProcessHandle, &basicInfo)))
            return status;

        // Read the address of the process parameters.
        if (!NT_SUCCESS(status = PhReadVirtualMemory(
            ProcessHandle,
            PTR_ADD_OFFSET(basicInfo.PebBaseAddress, FIELD_OFFSET(PEB, ProcessParameters)),
            &processParameters,
            sizeof(PVOID),
            NULL
            )))
            return status;

        // Read the string structure.
        if (!NT_SUCCESS(status = PhReadVirtualMemory(
            ProcessHandle,
            PTR_ADD_OFFSET(processParameters, offset),
            &unicodeString,
            sizeof(UNICODE_STRING),
            NULL
            )))
            return status;

        string = PhCreateStringEx(NULL, unicodeString.Length);

        // Read the string contents.
        if (!NT_SUCCESS(status = PhReadVirtualMemory(
            ProcessHandle,
            unicodeString.Buffer,
            string->Buffer,
            string->Length,
            NULL
            )))
        {
            PhDereferenceObject(string);
            return status;
        }
    }
    else
    {
        PVOID peb32;
        ULONG processParameters32;
        UNICODE_STRING32 unicodeString32;

        if (!NT_SUCCESS(status = PhGetProcessPeb32(ProcessHandle, &peb32)))
            return status;

        if (!NT_SUCCESS(status = PhReadVirtualMemory(
            ProcessHandle,
            PTR_ADD_OFFSET(peb32, FIELD_OFFSET(PEB32, ProcessParameters)),
            &processParameters32,
            sizeof(ULONG),
            NULL
            )))
            return status;

        if (!NT_SUCCESS(status = PhReadVirtualMemory(
            ProcessHandle,
            PTR_ADD_OFFSET(processParameters32, offset),
            &unicodeString32,
            sizeof(UNICODE_STRING32),
            NULL
            )))
            return status;

        string = PhCreateStringEx(NULL, unicodeString32.Length);

        // Read the string contents.
        if (!NT_SUCCESS(status = PhReadVirtualMemory(
            ProcessHandle,
            UlongToPtr(unicodeString32.Buffer),
            string->Buffer,
            string->Length,
            NULL
            )))
        {
            PhDereferenceObject(string);
            return status;
        }
    }

    *String = string;

    return status;
}

/**
 * Gets whether the process is running under the POSIX 
 * subsystem.
 *
 * \param ProcessHandle A handle to a process. The handle 
 * must have PROCESS_QUERY_LIMITED_INFORMATION and 
 * PROCESS_VM_READ access.
 * \param IsPosix A variable which receives a boolean 
 * indicating whether the process is running under the 
 * POSIX subsystem.
 */
NTSTATUS PhGetProcessIsPosix(
    __in HANDLE ProcessHandle,
    __out PBOOLEAN IsPosix
    )
{
    NTSTATUS status;
    PROCESS_BASIC_INFORMATION basicInfo;
    ULONG imageSubsystem;

    status = PhGetProcessBasicInformation(ProcessHandle, &basicInfo);

    if (!NT_SUCCESS(status))
        return status;

    // No PEB for processes like System.
    if (!basicInfo.PebBaseAddress)
        return STATUS_UNSUCCESSFUL;

    status = PhReadVirtualMemory(
        ProcessHandle,
        PTR_ADD_OFFSET(basicInfo.PebBaseAddress, FIELD_OFFSET(PEB, ImageSubsystem)),
        &imageSubsystem,
        sizeof(ULONG),
        NULL
        );

    if (NT_SUCCESS(status))
    {
        *IsPosix = imageSubsystem == IMAGE_SUBSYSTEM_POSIX_CUI;
    }

    return status;
}

/**
 * Gets a process' no-execute status.
 *
 * \param ProcessHandle A handle to a process. The handle 
 * must have PROCESS_QUERY_INFORMATION access.
 * \param ExecuteFlags A variable which receives the 
 * no-execute flags.
 */
NTSTATUS PhGetProcessExecuteFlags(
    __in HANDLE ProcessHandle,
    __out PULONG ExecuteFlags
    )
{
    if (PhKphHandle)
    {
        return KphQueryInformationProcess(
            PhKphHandle,
            ProcessHandle,
            KphProcessExecuteFlags,
            ExecuteFlags,
            sizeof(ULONG),
            NULL
            );
    }
    else
    {
        return NtQueryInformationProcess(
            ProcessHandle,
            ProcessExecuteFlags,
            ExecuteFlags,
            sizeof(ULONG),
            NULL
            );
    }
}

NTSTATUS PhGetProcessDepStatus(
    __in HANDLE ProcessHandle,
    __out PULONG DepStatus
    )
{
    NTSTATUS status;
    ULONG executeFlags;
    ULONG depStatus;

    if (!NT_SUCCESS(status = PhGetProcessExecuteFlags(
        ProcessHandle,
        &executeFlags
        )))
        return status;

    // Check if execution of data pages is enabled.
    if (executeFlags & MEM_EXECUTE_OPTION_ENABLE)
        depStatus = 0;
    else
        depStatus = PH_PROCESS_DEP_ENABLED;

    if (executeFlags & MEM_EXECUTE_OPTION_DISABLE_THUNK_EMULATION)
        depStatus |= PH_PROCESS_DEP_ATL_THUNK_EMULATION_DISABLED;
    if (executeFlags & MEM_EXECUTE_OPTION_PERMANENT)
        depStatus |= PH_PROCESS_DEP_PERMANENT;

    *DepStatus = depStatus;

    return status;
}

/**
 * Gets the POSIX command line of a process.
 *
 * \param ProcessHandle A handle to a process. The handle 
 * must have PROCESS_QUERY_LIMITED_INFORMATION and 
 * PROCESS_VM_READ access.
 * \param CommandLine A variable which receives a pointer 
 * to a string containing the POSIX command line. You must 
 * free the string using PhDereferenceObject() when you no 
 * longer need it.
 *
 * \retval STATUS_UNSUCCESSFUL The command line of the 
 * process could not be retrieved because it is too large.
 *
 * \remarks Do not use this function on a non-POSIX process. 
 * Use the PhGetProcessIsPosix() function to determine 
 * whether a process is running under the POSIX subsystem.
 */
NTSTATUS PhGetProcessPosixCommandLine(
    __in HANDLE ProcessHandle,
    __out PPH_STRING *CommandLine
    )
{
    NTSTATUS status;
    PROCESS_BASIC_INFORMATION basicInfo;
    PVOID processParameters;
    UNICODE_STRING commandLine;

    status = PhGetProcessBasicInformation(ProcessHandle, &basicInfo);

    if (!NT_SUCCESS(status))
        return status;

    if (!NT_SUCCESS(status = PhReadVirtualMemory(
        ProcessHandle,
        PTR_ADD_OFFSET(basicInfo.PebBaseAddress, FIELD_OFFSET(PEB, ProcessParameters)),
        &processParameters,
        sizeof(PVOID),
        NULL
        )))
        return status;

    if (!NT_SUCCESS(status = PhReadVirtualMemory(
        ProcessHandle,
        PTR_ADD_OFFSET(processParameters, FIELD_OFFSET(RTL_USER_PROCESS_PARAMETERS, CommandLine)),
        &commandLine,
        sizeof(UNICODE_STRING),
        NULL
        )))
        return status;

    // See ProcessHandle.cs from PH 1.x for how POSIX command lines work.
    {
        PVOID pointer = NULL;
        PVOID firstPointer = NULL;
        PVOID lastPointer = NULL;
        BOOLEAN zeroReached = FALSE;
        ULONG i;
        ULONG commandLineChunkSize;
        PCHAR commandLineChunk;

        i = 0;

        // Read the first command line pointer + the first environment pointer.

        while (i < sizeof(PVOID) * 100) // reasonable limit
        {
            PhReadVirtualMemory(
                ProcessHandle,
                PTR_ADD_OFFSET(commandLine.Buffer, i),
                &pointer,
                sizeof(PVOID),
                NULL
                );

            if (pointer && !firstPointer)
                firstPointer = pointer;
            if (zeroReached)
                lastPointer = pointer;

            i += sizeof(PVOID);

            if (zeroReached)
                break;
            else if (!pointer)
                zeroReached = TRUE;

            pointer = NULL;
        }

        commandLineChunkSize = (ULONG)((PBYTE)lastPointer - (PBYTE)firstPointer);

        // Set a limit on how much we're going to read.
        if (commandLineChunkSize > 0x1000)
            return STATUS_UNSUCCESSFUL;

        commandLineChunk = PhAllocate(commandLineChunkSize);

        // Read the chunk.
        if (!NT_SUCCESS(status = PhReadVirtualMemory(
            ProcessHandle,
            firstPointer,
            commandLineChunk,
            commandLineChunkSize,
            NULL
            )))
        {
            PhFree(commandLineChunk);
            return status;
        }

        // Replace the nulls in the chunk with spaces.
        for (i = 0; i < commandLineChunkSize; i++)
        {
            if (commandLineChunk[i] == 0)
            {
                commandLineChunk[i] = ' ';

                // Trim the last null/space.
                if (i == commandLineChunkSize - 1)
                {
                    commandLineChunkSize--;
                    break;
                }
            }
        }

        *CommandLine = PhCreateStringFromAnsiEx(
            commandLineChunk,
            commandLineChunkSize
            );
        PhFree(commandLineChunk);

        return status;
    }
}

/**
 * Gets a process' environment variables.
 *
 * \param ProcessHandle A handle to a process. The handle 
 * must have PROCESS_QUERY_INFORMATION and PROCESS_VM_READ 
 * access.
 * \param Variables A variable which will receive a pointer 
 * to an array of \ref PH_ENVIRONMENT_VARIABLE structures, one 
 * for each variable. You must free the array using 
 * PhFreeProcessEnvironmentVariables() when you no longer 
 * need it.
 * \param NumberOfVariables A variable which will receive 
 * the number of environment variables returned in the 
 * array.
 */
NTSTATUS PhGetProcessEnvironmentVariables(
    __in HANDLE ProcessHandle,
    __out PPH_ENVIRONMENT_VARIABLE *Variables,
    __out PULONG NumberOfVariables
    )
{
    return PhGetProcessEnvironmentVariablesEx(
        ProcessHandle,
        0,
        Variables,
        NumberOfVariables
        );
}

/**
 * Gets a process' environment variables.
 *
 * \param ProcessHandle A handle to a process. The handle 
 * must have PROCESS_QUERY_INFORMATION and PROCESS_VM_READ 
 * access.
 * \param Flags A combination of the following flags:
 * \li \c PH_GET_PROCESS_ENVIRONMENT_WOW64 Retrieve the WOW64 
 * environment block.
 * \param Variables A variable which will receive a pointer 
 * to an array of \ref PH_ENVIRONMENT_VARIABLE structures, one 
 * for each variable. You must free the array using 
 * PhFreeProcessEnvironmentVariables() when you no longer 
 * need it.
 * \param NumberOfVariables A variable which will receive 
 * the number of environment variables returned in the 
 * array.
 */
NTSTATUS PhGetProcessEnvironmentVariablesEx(
    __in HANDLE ProcessHandle,
    __in ULONG Flags,
    __out PPH_ENVIRONMENT_VARIABLE *Variables,
    __out PULONG NumberOfVariables
    )
{
    NTSTATUS status;
    PVOID environment;
    ULONG environmentLength;
    PWSTR buffer;
    PPH_LIST pairsList;
    ULONG i;
    PPH_ENVIRONMENT_VARIABLE variables;

    if (!(Flags & PH_GET_PROCESS_ENVIRONMENT_WOW64))
    {
        PROCESS_BASIC_INFORMATION basicInfo;
        PVOID processParameters;

        status = PhGetProcessBasicInformation(ProcessHandle, &basicInfo);

        if (!NT_SUCCESS(status))
            return status;

        if (!NT_SUCCESS(status = PhReadVirtualMemory(
            ProcessHandle,
            PTR_ADD_OFFSET(basicInfo.PebBaseAddress, FIELD_OFFSET(PEB, ProcessParameters)),
            &processParameters,
            sizeof(PVOID),
            NULL
            )))
            return status;

        if (!NT_SUCCESS(status = PhReadVirtualMemory(
            ProcessHandle,
            PTR_ADD_OFFSET(processParameters, FIELD_OFFSET(RTL_USER_PROCESS_PARAMETERS, Environment)),
            &environment,
            sizeof(PVOID),
            NULL
            )))
            return status;
    }
    else
    {
        PVOID peb32;
        ULONG processParameters32;
        ULONG environment32;

        status = PhGetProcessPeb32(ProcessHandle, &peb32);

        if (!NT_SUCCESS(status))
            return status;

        if (!NT_SUCCESS(status = PhReadVirtualMemory(
            ProcessHandle,
            PTR_ADD_OFFSET(peb32, FIELD_OFFSET(PEB32, ProcessParameters)),
            &processParameters32,
            sizeof(ULONG),
            NULL
            )))
            return status;

        if (!NT_SUCCESS(status = PhReadVirtualMemory(
            ProcessHandle,
            PTR_ADD_OFFSET(processParameters32, FIELD_OFFSET(RTL_USER_PROCESS_PARAMETERS32, Environment)),
            &environment32,
            sizeof(ULONG),
            NULL
            )))
            return status;

        environment = UlongToPtr(environment32);
    }

    {
        MEMORY_BASIC_INFORMATION mbi;

        if (!NT_SUCCESS(status = NtQueryVirtualMemory(
            ProcessHandle,
            environment,
            MemoryBasicInformation,
            &mbi,
            sizeof(MEMORY_BASIC_INFORMATION),
            NULL
            )))
            return status;

        environmentLength = (ULONG)(mbi.RegionSize -
            ((ULONG_PTR)environment - (ULONG_PTR)mbi.BaseAddress));
    }

    // Read in the entire region of memory.

    buffer = PhAllocate(environmentLength);

    if (!NT_SUCCESS(status = PhReadVirtualMemory(
        ProcessHandle,
        environment,
        buffer,
        environmentLength,
        NULL
        )))
    {
        PhFree(buffer);
        return status;
    }

    // Create a list of pairs.

    pairsList = PhCreateList(20);
    i = 0;
    environmentLength /= 2;

    while (TRUE)
    {
        ULONG oldIndex;

        // Go through the buffer and stop when we reach 
        // the end of the pair string.

        oldIndex = i;

        while (i < environmentLength && buffer[i] != 0)
            i++;

        // Check if the environment block has ended 
        // (the last string is zero-length) or if we 
        // overran the buffer.
        if (i == oldIndex || i >= environmentLength)
            break;

        // Save a pointer to the current pair string.
        PhAddItemList(pairsList, &buffer[oldIndex]);
        i++; // skip the null terminator
    }

    // Create the output array.

    variables = PhAllocate(sizeof(PH_ENVIRONMENT_VARIABLE) * pairsList->Count);

    for (i = 0; i < pairsList->Count; i++)
    {
        PWSTR pairPointer;
        PWSTR valuePointer;

        pairPointer = (PWSTR)pairsList->Items[i];
        valuePointer = wcschr(pairPointer, '=');

        variables[i].Name = PhCreateStringEx(pairPointer, (valuePointer - pairPointer) * 2);
        variables[i].Value = PhCreateString(valuePointer + 1);
    }

    *Variables = variables;
    *NumberOfVariables = pairsList->Count;

    PhDereferenceObject(pairsList);
    PhFree(buffer);

    return STATUS_SUCCESS;
}

/**
 * Frees an array of environment variables returned 
 * by PhGetProcessEnvironmentVariables().
 *
 * \param Variables A pointer to an array of 
 * environment variables.
 * \param NumberOfVariables The number of environment 
 * variables in the array.
 */
VOID PhFreeProcessEnvironmentVariables(
    __in PPH_ENVIRONMENT_VARIABLE Variables,
    __in ULONG NumberOfVariables
    )
{
    ULONG i;

    for (i = 0; i < NumberOfVariables; i++)
    {
        PhDereferenceObject(Variables[i].Name);
        PhDereferenceObject(Variables[i].Value);
    }

    PhFree(Variables);
}

/**
 * Gets the file name of a mapped section.
 *
 * \param ProcessHandle A handle to a process. The handle 
 * must have PROCESS_QUERY_INFORMATION access.
 * \param BaseAddress The base address of the section view.
 * \param FileName A variable which receives a pointer to 
 * a string containing the file name of the section. You 
 * must free the string using PhDereferenceObject() when 
 * you no longer need it.
 */
NTSTATUS PhGetProcessMappedFileName(
    __in HANDLE ProcessHandle,
    __in PVOID BaseAddress,
    __out PPH_STRING *FileName
    )
{
    NTSTATUS status;
    PVOID buffer;
    SIZE_T bufferSize;
    SIZE_T returnLength;
    PUNICODE_STRING unicodeString;

    bufferSize = 0x100;
    buffer = PhAllocate(bufferSize);

    status = NtQueryVirtualMemory(
        ProcessHandle,
        BaseAddress,
        MemoryMappedFilenameInformation,
        buffer,
        bufferSize,
        &returnLength
        );

    if (status == STATUS_BUFFER_OVERFLOW)
    {
        PhFree(buffer);
        bufferSize = returnLength;
        buffer = PhAllocate(bufferSize);

        status = NtQueryVirtualMemory(
            ProcessHandle,
            BaseAddress,
            MemoryMappedFilenameInformation,
            buffer,
            bufferSize,
            &returnLength
            );
    }

    if (!NT_SUCCESS(status))
    {
        PhFree(buffer);
        return status;
    }

    unicodeString = (PUNICODE_STRING)buffer;
    *FileName = PhCreateStringEx(
        unicodeString->Buffer,
        unicodeString->Length
        );
    PhFree(buffer);

    return status;
}

/**
 * Gets working set information for a process.
 *
 * \param ProcessHandle A handle to a process. The handle 
 * must have PROCESS_QUERY_INFORMATION access.
 * \param WorkingSetInformation A variable which receives a
 * pointer to the information. You must free the buffer using
 * PhFree() when you no longer need it.
 */
NTSTATUS PhGetProcessWorkingSetInformation(
    __in HANDLE ProcessHandle,
    __out PMEMORY_WORKING_SET_INFORMATION *WorkingSetInformation
    )
{
    NTSTATUS status;
    PVOID buffer;
    SIZE_T bufferSize;

    bufferSize = 0x8000;
    buffer = PhAllocate(bufferSize);

    while ((status = NtQueryVirtualMemory(
        ProcessHandle,
        NULL,
        MemoryWorkingSetInformation,
        buffer,
        bufferSize,
        NULL
        )) == STATUS_INFO_LENGTH_MISMATCH)
    {
        PhFree(buffer);
        bufferSize *= 2;

        // Fail if we're resizing the buffer to over 
        // 16 MB.
        if (bufferSize > PH_LARGE_BUFFER_SIZE)
            return STATUS_INSUFFICIENT_RESOURCES;

        buffer = PhAllocate(bufferSize);
    }

    if (!NT_SUCCESS(status))
    {
        PhFree(buffer);
        return status;
    }

    *WorkingSetInformation = (PMEMORY_WORKING_SET_INFORMATION)buffer;

    return status;
}

/**
 * Gets working set counters for a process.
 *
 * \param ProcessHandle A handle to a process. The handle 
 * must have PROCESS_QUERY_INFORMATION access.
 * \param WsCounters A variable which receives the 
 * counters.
 */
NTSTATUS PhGetProcessWsCounters(
    __in HANDLE ProcessHandle,
    __out PPH_PROCESS_WS_COUNTERS WsCounters
    )
{
    NTSTATUS status;
    PMEMORY_WORKING_SET_INFORMATION wsInfo;
    PH_PROCESS_WS_COUNTERS wsCounters;
    ULONG i;

    if (!NT_SUCCESS(status = PhGetProcessWorkingSetInformation(
        ProcessHandle,
        &wsInfo
        )))
        return status;

    memset(&wsCounters, 0, sizeof(PH_PROCESS_WS_COUNTERS));

    for (i = 0; i < wsInfo->NumberOfEntries; i++)
    {
        wsCounters.NumberOfPages++;

        if (wsInfo->WorkingSetInfo[i].ShareCount > 1)
            wsCounters.NumberOfSharedPages++;
        if (wsInfo->WorkingSetInfo[i].ShareCount == 0)
            wsCounters.NumberOfPrivatePages++;
        if (wsInfo->WorkingSetInfo[i].Shared)
            wsCounters.NumberOfShareablePages++;
    }

    PhFree(wsInfo);

    *WsCounters = wsCounters;

    return status;
}

/**
 * Enumerates all handles in a process.
 *
 * \param ProcessHandle A handle to a process.
 * \param Handles A variable which receives a pointer 
 * to a buffer containing information about the 
 * opened handles. You must free the structure using 
 * PhFree() when you no longer need it.
 *
 * \remarks This function requires a valid KProcessHacker 
 * handle.
 */
NTSTATUS PhEnumProcessHandles(
    __in HANDLE ProcessHandle,
    __out PKPH_PROCESS_HANDLE_INFORMATION *Handles
    )
{
    NTSTATUS status;
    PVOID buffer;
    ULONG bufferSize = 2048;

    buffer = PhAllocate(bufferSize);

    while (TRUE)
    {
        status = KphEnumerateProcessHandles(
            PhKphHandle,
            ProcessHandle,
            buffer,
            bufferSize,
            &bufferSize
            );

        if (status == STATUS_BUFFER_TOO_SMALL)
        {
            PhFree(buffer);
            buffer = PhAllocate(bufferSize);
        }
        else
        {
            break;
        }
    }

    if (!NT_SUCCESS(status))
    {
        PhFree(buffer);
        return status;
    }

    *Handles = buffer;

    return status;
}

/**
 * Sets a process' affinity mask.
 *
 * \param ProcessHandle A handle to a process. The handle 
 * must have PROCESS_SET_INFORMATION access.
 * \param AffinityMask The new affinity mask.
 */
NTSTATUS PhSetProcessAffinityMask(
    __in HANDLE ProcessHandle,
    __in ULONG_PTR AffinityMask
    )
{
    return NtSetInformationProcess(
        ProcessHandle,
        ProcessAffinityMask,
        &AffinityMask,
        sizeof(ULONG_PTR)
        );
}

/**
 * Sets a process' I/O priority.
 *
 * \param ProcessHandle A handle to a process. The handle 
 * must have PROCESS_SET_INFORMATION access.
 * \param IoPriority The new I/O priority.
 */
NTSTATUS PhSetProcessIoPriority(
    __in HANDLE ProcessHandle,
    __in ULONG IoPriority
    )
{
    if (PhKphHandle)
    {
        return KphSetInformationProcess(
            PhKphHandle,
            ProcessHandle,
            KphProcessIoPriority,
            &IoPriority,
            sizeof(ULONG)
            );
    }
    else
    {
        return NtSetInformationProcess(
            ProcessHandle,
            ProcessIoPriority,
            &IoPriority,
            sizeof(ULONG)
            );
    }
}

/**
 * Sets a process' no-execute status.
 *
 * \param ProcessHandle A handle to a process.
 * \param ExecuteFlags The new no-execute flags.
 *
 * \remarks This function requires a valid KProcessHacker 
 * handle.
 */
NTSTATUS PhSetProcessExecuteFlags(
    __in HANDLE ProcessHandle,
    __in ULONG ExecuteFlags
    )
{
    return KphSetInformationProcess(
        PhKphHandle,
        ProcessHandle,
        KphProcessExecuteFlags,
        &ExecuteFlags,
        sizeof(ULONG)
        );
}

NTSTATUS PhSetProcessDepStatus(
    __in HANDLE ProcessHandle,
    __in ULONG DepStatus
    )
{
    ULONG executeFlags;

    if (DepStatus & PH_PROCESS_DEP_ENABLED)
        executeFlags = MEM_EXECUTE_OPTION_DISABLE;
    else
        executeFlags = MEM_EXECUTE_OPTION_ENABLE;

    if (DepStatus & PH_PROCESS_DEP_ATL_THUNK_EMULATION_DISABLED)
        executeFlags |= MEM_EXECUTE_OPTION_DISABLE_THUNK_EMULATION;
    if (DepStatus & PH_PROCESS_DEP_PERMANENT)
        executeFlags |= MEM_EXECUTE_OPTION_PERMANENT;

    return PhSetProcessExecuteFlags(ProcessHandle, executeFlags);
}

NTSTATUS PhSetProcessDepStatusInvasive(
    __in HANDLE ProcessHandle,
    __in ULONG DepStatus,
    __in_opt PLARGE_INTEGER Timeout
    )
{
    NTSTATUS status;
    HANDLE threadHandle;
    PVOID setProcessDepPolicy;
    ULONG flags;

    setProcessDepPolicy = PhGetProcAddress(L"kernel32.dll", "SetProcessDEPPolicy");

    if (!setProcessDepPolicy)
        return STATUS_NOT_SUPPORTED;

    flags = 0;

    if (DepStatus & PH_PROCESS_DEP_ENABLED)
        flags |= PROCESS_DEP_ENABLE;
    if (DepStatus & PH_PROCESS_DEP_ATL_THUNK_EMULATION_DISABLED)
        flags |= PROCESS_DEP_DISABLE_ATL_THUNK_EMULATION;

    if (WindowsVersion >= WINDOWS_VISTA)
    {
        status = RtlCreateUserThread(
            ProcessHandle,
            NULL,
            FALSE,
            0,
            0,
            0,
            (PUSER_THREAD_START_ROUTINE)setProcessDepPolicy,
            (PVOID)flags,
            &threadHandle,
            NULL
            );
    }
    else
    {
        if (threadHandle = CreateRemoteThread(
            ProcessHandle,
            NULL,
            0,
            (PTHREAD_START_ROUTINE)setProcessDepPolicy,
            (PVOID)flags,
            0,
            NULL
            ))
        {
            status = STATUS_SUCCESS;
        }
        else
        {
            status = PhGetLastWin32ErrorAsNtStatus();
        }
    }

    if (!NT_SUCCESS(status))
        return status;

    // Wait for the thread to finish.
    status = NtWaitForSingleObject(threadHandle, FALSE, Timeout);
    NtClose(threadHandle);

    return status;
}

/**
 * Causes a process to load a DLL.
 *
 * \param ProcessHandle A handle to a process. The handle 
 * must have PROCESS_QUERY_LIMITED_INFORMATION, PROCESS_CREATE_THREAD,
 * PROCESS_VM_OPERATION, PROCESS_VM_READ and PROCESS_VM_WRITE access.
 * \param FileName The file name of the DLL to inject.
 * \param Timeout The timeout, in milliseconds, for the 
 * process to load the DLL.
 *
 * \remarks If the process does not load the DLL before 
 * the timeout expires it may crash. Choose the timeout 
 * value carefully.
 */
NTSTATUS PhInjectDllProcess(
    __in HANDLE ProcessHandle,
    __in PWSTR FileName,
    __in_opt PLARGE_INTEGER Timeout
    )
{
#ifdef _M_X64
    static PVOID loadLibraryW32 = NULL;
#endif

    NTSTATUS status;
#ifdef _M_X64
    BOOLEAN isWow64 = FALSE;
    BOOLEAN isModule32 = FALSE;
    PH_MAPPED_IMAGE mappedImage;
#endif
    PVOID threadStart;
    PH_STRINGREF fileName;
    PVOID baseAddress = NULL;
    SIZE_T allocSize;
    HANDLE threadHandle;

#ifdef _M_X64
    PhGetProcessIsWow64(ProcessHandle, &isWow64);

    if (isWow64)
    {
        if (!NT_SUCCESS(status = PhLoadMappedImage(FileName, NULL, TRUE, &mappedImage)))
            return status;

        isModule32 = mappedImage.Magic == IMAGE_NT_OPTIONAL_HDR32_MAGIC;
        PhUnloadMappedImage(&mappedImage);
    }

    if (!isModule32)
    {
#endif
        threadStart = PhGetProcAddress(L"kernel32.dll", "LoadLibraryW");
#ifdef _M_X64
    }
    else
    {
        threadStart = loadLibraryW32;

        if (!threadStart)
        {
            PPH_STRING kernel32FileName;

            kernel32FileName = PhConcatStrings2(USER_SHARED_DATA->NtSystemRoot, L"\\SysWow64\\kernel32.dll");
            status = PhGetProcedureAddressRemote(
                ProcessHandle,
                kernel32FileName->Buffer,
                "LoadLibraryW",
                0,
                &loadLibraryW32,
                NULL
                );
            PhDereferenceObject(kernel32FileName);

            if (!NT_SUCCESS(status))
                return status;

            threadStart = loadLibraryW32;
        }
    }
#endif

    PhInitializeStringRef(&fileName, FileName);
    allocSize = fileName.Length + sizeof(WCHAR);

    if (!NT_SUCCESS(status = NtAllocateVirtualMemory(
        ProcessHandle,
        &baseAddress,
        0,
        &allocSize,
        MEM_COMMIT,
        PAGE_READWRITE
        )))
        return status;

    if (!NT_SUCCESS(status = PhWriteVirtualMemory(
        ProcessHandle,
        baseAddress,
        fileName.Buffer,
        fileName.Length + sizeof(WCHAR),
        NULL
        )))
        goto FreeExit;

    // Vista seems to support native threads better than XP.
    if (WindowsVersion >= WINDOWS_VISTA)
    {
        if (!NT_SUCCESS(status = RtlCreateUserThread(
            ProcessHandle,
            NULL,
            FALSE,
            0,
            0,
            0,
            (PUSER_THREAD_START_ROUTINE)threadStart,
            baseAddress,
            &threadHandle,
            NULL
            )))
            goto FreeExit;
    }
    else
    {
        if (!(threadHandle = CreateRemoteThread(
            ProcessHandle,
            NULL,
            0,
            (PTHREAD_START_ROUTINE)threadStart,
            baseAddress,
            0,
            NULL
            )))
        {
            status = PhGetLastWin32ErrorAsNtStatus();
            goto FreeExit;
        }
    }

    // Wait for the thread to finish.
    status = NtWaitForSingleObject(threadHandle, FALSE, Timeout);
    NtClose(threadHandle);

FreeExit:
    // Size needs to be zero if we're freeing.
    allocSize = 0;
    NtFreeVirtualMemory(
        ProcessHandle,
        &baseAddress,
        &allocSize,
        MEM_RELEASE
        );

    return status;
}

/**
 * Causes a process to unload a DLL.
 *
 * \param ProcessHandle A handle to a process. The handle 
 * must have PROCESS_QUERY_LIMITED_INFORMATION, PROCESS_CREATE_THREAD,
 * PROCESS_VM_OPERATION, PROCESS_VM_READ and PROCESS_VM_WRITE access.
 * \param BaseAddress The base address of the DLL to unload.
 * \param Timeout The timeout, in milliseconds, for the 
 * process to unload the DLL.
 */
NTSTATUS PhUnloadDllProcess(
    __in HANDLE ProcessHandle,
    __in PVOID BaseAddress,
    __in_opt PLARGE_INTEGER Timeout
    )
{
#ifdef _M_X64
    static PVOID ldrUnloadDll32 = NULL;
#endif

    NTSTATUS status;
#ifdef _M_X64
    BOOLEAN isWow64 = FALSE;
    BOOLEAN isModule32 = FALSE;
#endif
    HANDLE threadHandle;
    THREAD_BASIC_INFORMATION basicInfo;
    PVOID threadStart;

#ifdef _M_X64
    PhGetProcessIsWow64(ProcessHandle, &isWow64);
#endif

    status = PhSetProcessModuleLoadCount(
        ProcessHandle,
        BaseAddress,
        1
        );

#ifdef _M_X64
    if (isWow64 && status == STATUS_DLL_NOT_FOUND)
    {
        // The DLL might be 32-bit.
        status = PhSetProcessModuleLoadCount32(
            ProcessHandle,
            BaseAddress,
            1
            );

        if (NT_SUCCESS(status))
            isModule32 = TRUE;
    }
#endif

    if (!NT_SUCCESS(status))
        return status;

#ifdef _M_X64
    if (!isModule32)
    {
#endif
        threadStart = PhGetProcAddress(L"ntdll.dll", "LdrUnloadDll");
#ifdef _M_X64
    }
    else
    {
        threadStart = ldrUnloadDll32;

        if (!threadStart)
        {
            PPH_STRING ntdll32FileName;

            ntdll32FileName = PhConcatStrings2(USER_SHARED_DATA->NtSystemRoot, L"\\SysWow64\\ntdll.dll");
            status = PhGetProcedureAddressRemote(
                ProcessHandle,
                ntdll32FileName->Buffer,
                "LdrUnloadDll",
                0,
                &ldrUnloadDll32,
                NULL
                );
            PhDereferenceObject(ntdll32FileName);

            if (!NT_SUCCESS(status))
                return status;

            threadStart = ldrUnloadDll32;
        }
    }
#endif

    if (WindowsVersion >= WINDOWS_VISTA)
    {
        status = RtlCreateUserThread(
            ProcessHandle,
            NULL,
            FALSE,
            0,
            0,
            0,
            (PUSER_THREAD_START_ROUTINE)threadStart,
            BaseAddress,
            &threadHandle,
            NULL
            );
    }
    else
    {
        if (!(threadHandle = CreateRemoteThread(
            ProcessHandle,
            NULL,
            0,
            (PTHREAD_START_ROUTINE)threadStart,
            BaseAddress,
            0,
            NULL
            )))
        {
            status = PhGetLastWin32ErrorAsNtStatus();
        }
    }

    if (!NT_SUCCESS(status))
        return status;

    status = NtWaitForSingleObject(threadHandle, FALSE, Timeout);

    if (status == STATUS_WAIT_0)
    {
        status = PhGetThreadBasicInformation(threadHandle, &basicInfo);

        if (NT_SUCCESS(status))
            status = basicInfo.ExitStatus;
    }

    NtClose(threadHandle);

    return status;
}

/**
 * Sets a thread's affinity mask.
 *
 * \param ThreadHandle A handle to a thread. The handle 
 * must have THREAD_SET_LIMITED_INFORMATION access.
 * \param AffinityMask The new affinity mask.
 */
NTSTATUS PhSetThreadAffinityMask(
    __in HANDLE ThreadHandle,
    __in ULONG_PTR AffinityMask
    )
{
    return NtSetInformationThread(
        ThreadHandle,
        ThreadAffinityMask,
        &AffinityMask,
        sizeof(ULONG_PTR)
        );
}

/**
 * Sets a thread's I/O priority.
 *
 * \param ThreadHandle A handle to a thread. The handle 
 * must have THREAD_SET_LIMITED_INFORMATION access.
 * \param IoPriority The new I/O priority.
 */
NTSTATUS PhSetThreadIoPriority(
    __in HANDLE ThreadHandle,
    __in ULONG IoPriority
    )
{
    if (PhKphHandle)
    {
        return KphSetInformationThread(
            PhKphHandle,
            ThreadHandle,
            KphThreadIoPriority,
            &IoPriority,
            sizeof(ULONG)
            );
    }
    else
    {
        return NtSetInformationThread(
            ThreadHandle,
            ThreadIoPriority,
            &IoPriority,
            sizeof(ULONG)
            );
    }
}

/**
 * Converts a STACKFRAME64 structure to a 
 * PH_THREAD_STACK_FRAME structure.
 *
 * \param StackFrame64 A pointer to the STACKFRAME64 structure
 * to convert.
 * \param ThreadStackFrame A pointer to the resulting 
 * PH_THREAD_STACK_FRAME structure.
 */
VOID PhpConvertStackFrame(
    __in STACKFRAME64 *StackFrame64,
    __out PPH_THREAD_STACK_FRAME ThreadStackFrame
    )
{
    ULONG i;

    ThreadStackFrame->PcAddress = (PVOID)StackFrame64->AddrPC.Offset;
    ThreadStackFrame->ReturnAddress = (PVOID)StackFrame64->AddrReturn.Offset;
    ThreadStackFrame->FrameAddress = (PVOID)StackFrame64->AddrFrame.Offset;
    ThreadStackFrame->StackAddress = (PVOID)StackFrame64->AddrStack.Offset;
    ThreadStackFrame->BStoreAddress = (PVOID)StackFrame64->AddrBStore.Offset;

    for (i = 0; i < 4; i++)
        ThreadStackFrame->Params[i] = (PVOID)StackFrame64->Params[i];
}

/**
 * Walks a thread's stack.
 *
 * \param ThreadHandle A handle to a thread. The handle 
 * must have THREAD_GET_CONTEXT and THREAD_SUSPEND_RESUME 
 * access. The handle can have any access for kernel stack 
 * walking.
 * \param ProcessHandle A handle to the thread's parent 
 * process. The handle must have PROCESS_QUERY_INFORMATION 
 * and PROCESS_VM_READ access. If a symbol provider is 
 * being used, pass its process handle.
 * \param Flags A combination of flags.
 * \li \c PH_WALK_I386_STACK Walks the x86 stack. On AMD64 
 * systems this flag walks the WOW64 stack.
 * \li \c PH_WALK_AMD64_STACK Walks the AMD64 stack. On x86 
 * systems this flag is ignored.
 * \li \c PH_WALK_KERNEL_STACK Walks the kernel stack. This 
 * flag is ignored if there is no active KProcessHacker
 * connection.
 * \param Callback A callback function which is executed 
 * for each stack frame.
 * \param Context A user-defined value to pass to the 
 * callback function.
 */
NTSTATUS PhWalkThreadStack(
    __in HANDLE ThreadHandle,
    __in_opt HANDLE ProcessHandle,
    __in ULONG Flags,
    __in PPH_WALK_THREAD_STACK_CALLBACK Callback,
    __in_opt PVOID Context
    )
{
    NTSTATUS status = STATUS_SUCCESS;
    BOOLEAN suspended = FALSE;
    BOOLEAN processOpened = FALSE;

    // Open a handle to the process if we weren't given one.
    if (!ProcessHandle)
    {
        if (!NT_SUCCESS(status = PhOpenThreadProcess(
            &ProcessHandle,
            PROCESS_QUERY_INFORMATION | PROCESS_VM_READ,
            ThreadHandle
            )))
            return status;

        processOpened = TRUE;
    }

    // Suspend the thread to avoid inaccurate results.
    if (NT_SUCCESS(NtSuspendThread(ThreadHandle, NULL)))
        suspended = TRUE;

    // Kernel stack walk.
    if ((Flags & PH_WALK_KERNEL_STACK) && PhKphHandle)
    {
        PVOID stack[62 - 1]; // 62 limit for XP and Server 2003.
        ULONG capturedFrames;
        ULONG i;

        if (NT_SUCCESS(KphCaptureStackBackTraceThread(
            PhKphHandle,
            ThreadHandle,
            1,
            sizeof(stack) / sizeof(PVOID),
            stack,
            &capturedFrames,
            NULL
            )))
        {
            PH_THREAD_STACK_FRAME threadStackFrame;

            memset(&threadStackFrame, 0, sizeof(PH_THREAD_STACK_FRAME));

            for (i = 0; i < capturedFrames; i++)
            {
                threadStackFrame.PcAddress = stack[i];

                if (!Callback(&threadStackFrame, Context))
                {
                    goto ResumeExit;
                }
            }
        }
    }

#ifdef _M_X64
    if (Flags & PH_WALK_AMD64_STACK)
    {
        STACKFRAME64 stackFrame;
        PH_THREAD_STACK_FRAME threadStackFrame;
        CONTEXT context;

        context.ContextFlags = CONTEXT_ALL;

        if (!NT_SUCCESS(status = PhGetThreadContext(
            ThreadHandle,
            &context
            )))
            goto SkipAmd64Stack;

        memset(&stackFrame, 0, sizeof(STACKFRAME64));
        stackFrame.AddrPC.Mode = AddrModeFlat;
        stackFrame.AddrPC.Offset = context.Rip;
        stackFrame.AddrStack.Mode = AddrModeFlat;
        stackFrame.AddrStack.Offset = context.Rsp;
        stackFrame.AddrFrame.Mode = AddrModeFlat;
        stackFrame.AddrFrame.Offset = context.Rbp;

        while (TRUE)
        {
            if (!PhStackWalk(
                IMAGE_FILE_MACHINE_AMD64,
                ProcessHandle,
                ThreadHandle,
                &stackFrame,
                &context,
                NULL,
                NULL,
                NULL,
                NULL
                ))
                break;

            // If we have an invalid instruction pointer, break.
            if (!stackFrame.AddrPC.Offset || stackFrame.AddrPC.Offset == -1)
                break;

            // Convert the stack frame and execute the callback.

            PhpConvertStackFrame(&stackFrame, &threadStackFrame);

            if (!Callback(&threadStackFrame, Context))
                goto ResumeExit;
        }
    }

SkipAmd64Stack:
#endif

    // x86/WOW64 stack walk.
    if (Flags & PH_WALK_I386_STACK)
    {
        STACKFRAME64 stackFrame;
        PH_THREAD_STACK_FRAME threadStackFrame;
#ifndef _M_X64
        CONTEXT context;

        context.ContextFlags = CONTEXT_ALL;

        if (!NT_SUCCESS(status = PhGetThreadContext(
            ThreadHandle,
            &context
            )))
            goto SkipI386Stack;
#else
        WOW64_CONTEXT context;

        context.ContextFlags = WOW64_CONTEXT_ALL;

        if (!NT_SUCCESS(status = NtQueryInformationThread(
            ThreadHandle,
            ThreadWow64Context,
            &context,
            sizeof(WOW64_CONTEXT),
            NULL
            )))
            goto SkipI386Stack;
#endif

        memset(&stackFrame, 0, sizeof(STACKFRAME64));
        stackFrame.AddrPC.Mode = AddrModeFlat;
        stackFrame.AddrPC.Offset = context.Eip;
        stackFrame.AddrStack.Mode = AddrModeFlat;
        stackFrame.AddrStack.Offset = context.Esp;
        stackFrame.AddrFrame.Mode = AddrModeFlat;
        stackFrame.AddrFrame.Offset = context.Ebp;

        while (TRUE)
        {
            if (!PhStackWalk(
                IMAGE_FILE_MACHINE_I386,
                ProcessHandle,
                ThreadHandle,
                &stackFrame,
                &context,
                NULL,
                NULL,
                NULL,
                NULL
                ))
                break;

            // If we have an invalid instruction pointer, break.
            if (!stackFrame.AddrPC.Offset || stackFrame.AddrPC.Offset == -1)
                break;

            // Convert the stack frame and execute the callback.

            PhpConvertStackFrame(&stackFrame, &threadStackFrame);

            if (!Callback(&threadStackFrame, Context))
                goto ResumeExit;
        }
    }

SkipI386Stack:

ResumeExit:
    if (suspended)
        NtResumeThread(ThreadHandle, NULL);

    if (processOpened)
        NtClose(ProcessHandle);

    return status;
}

NTSTATUS PhGetJobProcessIdList(
    __in HANDLE JobHandle,
    __out PJOBOBJECT_BASIC_PROCESS_ID_LIST *ProcessIdList
    )
{
    NTSTATUS status;
    PVOID buffer;
    ULONG bufferSize;

    bufferSize = 0x100;
    buffer = PhAllocate(bufferSize);

    status = NtQueryInformationJobObject(
        JobHandle,
        JobObjectBasicProcessIdList,
        buffer,
        bufferSize,
        &bufferSize
        );

    if (status == STATUS_BUFFER_OVERFLOW)
    {
        PhFree(buffer);
        buffer = PhAllocate(bufferSize);

        status = NtQueryInformationJobObject(
            JobHandle,
            JobObjectBasicProcessIdList,
            buffer,
            bufferSize,
            NULL
            );
    }

    if (!NT_SUCCESS(status))
    {
        PhFree(buffer);
        return status;
    }

    *ProcessIdList = (PJOBOBJECT_BASIC_PROCESS_ID_LIST)buffer;

    return status;
}

/**
 * Queries variable-sized information for a token.
 * The function allocates a buffer to contain the information.
 *
 * \param TokenHandle A handle to a token. The access required 
 * depends on the information class specified.
 * \param TokenInformationClass The information class to retrieve.
 * \param Buffer A variable which receives a pointer to a buffer 
 * containing the information. You must free the buffer using 
 * PhFree() when you no longer need it.
 */
NTSTATUS PhpQueryTokenVariableSize(
    __in HANDLE TokenHandle,
    __in TOKEN_INFORMATION_CLASS TokenInformationClass,
    __out PPVOID Buffer
    )
{
    NTSTATUS status;
    PVOID buffer;
    ULONG returnLength = 0;

    NtQueryInformationToken(
        TokenHandle,
        TokenInformationClass,
        NULL,
        0,
        &returnLength
        );
    buffer = PhAllocate(returnLength);
    status = NtQueryInformationToken(
        TokenHandle,
        TokenInformationClass,
        buffer,
        returnLength,
        &returnLength
        );

    if (NT_SUCCESS(status))
    {
        *Buffer = buffer;
    }
    else
    {
        PhFree(buffer);
    }

    return status;
}

/**
 * Gets a token's user.
 *
 * \param TokenHandle A handle to a token. The handle 
 * must have TOKEN_QUERY access.
 * \param User A variable which receives a pointer to 
 * a structure containing the token's user. You must 
 * free the structure using PhFree() when you no longer 
 * need it.
 */
NTSTATUS PhGetTokenUser(
    __in HANDLE TokenHandle,
    __out PTOKEN_USER *User
    )
{
    return PhpQueryTokenVariableSize(
        TokenHandle,
        TokenUser,
        User
        );
}

/**
 * Gets a token's owner.
 *
 * \param TokenHandle A handle to a token. The handle 
 * must have TOKEN_QUERY access.
 * \param Owner A variable which receives a pointer to 
 * a structure containing the token's owner. You must 
 * free the structure using PhFree() when you no longer 
 * need it.
 */
NTSTATUS PhGetTokenOwner(
    __in HANDLE TokenHandle,
    __out PTOKEN_OWNER *Owner
    )
{
    return PhpQueryTokenVariableSize(
        TokenHandle,
        TokenOwner,
        Owner
        );
}

/**
 * Gets a token's primary group.
 *
 * \param TokenHandle A handle to a token. The handle 
 * must have TOKEN_QUERY access.
 * \param PrimaryGroup A variable which receives a pointer to 
 * a structure containing the token's primary group. You must 
 * free the structure using PhFree() when you no longer 
 * need it.
 */
NTSTATUS PhGetTokenPrimaryGroup(
    __in HANDLE TokenHandle,
    __out PTOKEN_PRIMARY_GROUP *PrimaryGroup
    )
{
    return PhpQueryTokenVariableSize(
        TokenHandle,
        TokenPrimaryGroup,
        PrimaryGroup
        );
}

/**
 * Gets a token's groups.
 *
 * \param TokenHandle A handle to a token. The handle 
 * must have TOKEN_QUERY access.
 * \param Groups A variable which receives a pointer to 
 * a structure containing the token's groups. You must 
 * free the structure using PhFree() when you no longer 
 * need it.
 */
NTSTATUS PhGetTokenGroups(
    __in HANDLE TokenHandle,
    __out PTOKEN_GROUPS *Groups
    )
{
    return PhpQueryTokenVariableSize(
        TokenHandle,
        TokenGroups,
        Groups
        );
}

/**
 * Gets a token's privileges.
 *
 * \param TokenHandle A handle to a token. The handle 
 * must have TOKEN_QUERY access.
 * \param Privileges A variable which receives a pointer to 
 * a structure containing the token's privileges. You must 
 * free the structure using PhFree() when you no longer 
 * need it.
 */
NTSTATUS PhGetTokenPrivileges(
    __in HANDLE TokenHandle,
    __out PTOKEN_PRIVILEGES *Privileges
    )
{
    return PhpQueryTokenVariableSize(
        TokenHandle,
        TokenPrivileges,
        Privileges
        );
}

NTSTATUS PhSetTokenSessionId(
    __in HANDLE TokenHandle,
    __in ULONG SessionId
    )
{
    return NtSetInformationToken(
        TokenHandle,
        TokenSessionId,
        &SessionId,
        sizeof(ULONG)
        );
}

/**
 * Modifies a token privilege.
 *
 * \param TokenHandle A handle to a token. The handle
 * must have TOKEN_ADJUST_PRIVILEGES access.
 * \param PrivilegeName The name of the privilege to 
 * modify. If this parameter is NULL, you must specify 
 * a LUID in the \a PrivilegeLuid parameter.
 * \param PrivilegeLuid The LUID of the privilege to 
 * modify. If this parameter is NULL, you must specify 
 * a name in the \a PrivilegeName parameter.
 * \param Attributes The new attributes of the privilege.
 */
BOOLEAN PhSetTokenPrivilege(
    __in HANDLE TokenHandle,
    __in_opt PWSTR PrivilegeName,
    __in_opt PLUID PrivilegeLuid,
    __in ULONG Attributes
    )
{
    NTSTATUS status;
    TOKEN_PRIVILEGES privileges;

    privileges.PrivilegeCount = 1;
    privileges.Privileges[0].Attributes = Attributes;

    if (PrivilegeLuid)
    {
        privileges.Privileges[0].Luid = *PrivilegeLuid;
    }
    else if (PrivilegeName)
    {
        PH_STRINGREF privilegeName;

        PhInitializeStringRef(&privilegeName, PrivilegeName);

        if (!PhLookupPrivilegeValue(
            &privilegeName,
            &privileges.Privileges[0].Luid
            ))
            return FALSE;
    }
    else
    {
        return FALSE;
    }

    if (!NT_SUCCESS(status = NtAdjustPrivilegesToken(
        TokenHandle,
        FALSE,
        &privileges,
        0,
        NULL,
        NULL
        )))
        return FALSE;

    if (status == STATUS_NOT_ALL_ASSIGNED)
        return FALSE;

    return TRUE;
}

BOOLEAN PhSetTokenPrivilege2(
    __in HANDLE TokenHandle,
    __in LONG Privilege,
    __in ULONG Attributes
    )
{
    LUID privilegeLuid;

    privilegeLuid = RtlConvertLongToLuid(Privilege);

    return PhSetTokenPrivilege(TokenHandle, NULL, &privilegeLuid, Attributes);
}

/**
 * Sets whether virtualization is enabled for a token.
 *
 * \param TokenHandle A handle to a token. The handle 
 * must have TOKEN_WRITE access.
 * \param IsVirtualizationEnabled A boolean indicating 
 * whether virtualization is to be enabled for the token.
 */
NTSTATUS PhSetTokenIsVirtualizationEnabled(
    __in HANDLE TokenHandle,
    __in BOOLEAN IsVirtualizationEnabled
    )
{
    ULONG virtualizationEnabled;

    virtualizationEnabled = IsVirtualizationEnabled;

    return NtSetInformationToken(
        TokenHandle,
        TokenVirtualizationEnabled,
        &virtualizationEnabled,
        sizeof(ULONG)
        );
}

/**
 * Gets a token's integrity level.
 *
 * \param TokenHandle A handle to a token. The handle 
 * must have TOKEN_QUERY access.
 * \param IntegrityLevel A variable which receives 
 * the integrity level of the token.
 * \param IntegrityString A variable which receives a 
 * pointer to a string containing a string representation 
 * of the integrity level.
 */
NTSTATUS PhGetTokenIntegrityLevel(
    __in HANDLE TokenHandle,
    __out_opt PPH_INTEGRITY IntegrityLevel, 
    __out_opt PWSTR *IntegrityString
    )
{
    NTSTATUS status;
    PTOKEN_MANDATORY_LABEL mandatoryLabel;
    ULONG subAuthority;
    PH_INTEGRITY integrityLevel;
    PWSTR integrityString;

    status = PhpQueryTokenVariableSize(TokenHandle, TokenIntegrityLevel, &mandatoryLabel);

    if (!NT_SUCCESS(status))
        return status;

    subAuthority = *RtlSubAuthoritySid(mandatoryLabel->Label.Sid, 0);
    PhFree(mandatoryLabel);

    switch (subAuthority)
    {
    case SECURITY_MANDATORY_UNTRUSTED_RID:
        integrityLevel = PiUntrusted;
        integrityString = L"Untrusted";
        break;
    case SECURITY_MANDATORY_LOW_RID:
        integrityLevel = PiLow;
        integrityString = L"Low";
        break;
    case SECURITY_MANDATORY_MEDIUM_RID:
        integrityLevel = PiMedium;
        integrityString = L"Medium";
        break;
    case SECURITY_MANDATORY_MEDIUM_PLUS_RID:
        integrityLevel = PiMediumPlus;
        integrityString = L"MediumPlus";
        break;
    case SECURITY_MANDATORY_HIGH_RID:
        integrityLevel = PiHigh;
        integrityString = L"High";
        break;
    case SECURITY_MANDATORY_SYSTEM_RID:
        integrityLevel = PiSystem;
        integrityString = L"System";
        break;
    case SECURITY_MANDATORY_PROTECTED_PROCESS_RID:
        integrityLevel = PiProtected;
        integrityString = L"Protected";
        break;
    default:
        return STATUS_UNSUCCESSFUL;
    }

    if (IntegrityLevel)
        *IntegrityLevel = integrityLevel;
    if (IntegrityString)
        *IntegrityString = integrityString;

    return status;
}

NTSTATUS PhpQueryFileVariableSize(
    __in HANDLE FileHandle,
    __in FILE_INFORMATION_CLASS FileInformationClass,
    __out PPVOID Buffer
    )
{
    NTSTATUS status;
    IO_STATUS_BLOCK isb;
    PVOID buffer;
    ULONG bufferSize = 0x200;

    buffer = PhAllocate(bufferSize);

    while (TRUE)
    {
        status = NtQueryInformationFile(
            FileHandle,
            &isb,
            buffer,
            bufferSize,
            FileInformationClass
            );

        if (
            status == STATUS_BUFFER_OVERFLOW ||
            status == STATUS_BUFFER_TOO_SMALL ||
            status == STATUS_INFO_LENGTH_MISMATCH
            )
        {
            PhFree(buffer);
            bufferSize *= 2;
            buffer = PhAllocate(bufferSize);
        }
        else
        {
            break;
        }
    }

    if (NT_SUCCESS(status))
    {
        *Buffer = buffer;
    }
    else
    {
        PhFree(buffer);
    }

    return status;
}

NTSTATUS PhGetFileSize(
    __in HANDLE FileHandle,
    __out PLARGE_INTEGER Size
    )
{
    NTSTATUS status;
    FILE_STANDARD_INFORMATION standardInfo;
    IO_STATUS_BLOCK isb;

    status = NtQueryInformationFile(
        FileHandle,
        &isb,
        &standardInfo,
        sizeof(FILE_STANDARD_INFORMATION),
        FileStandardInformation
        );

    if (!NT_SUCCESS(status))
        return status;

    *Size = standardInfo.EndOfFile;

    return status;
}

NTSTATUS PhSetFileSize(
    __in HANDLE FileHandle,
    __in PLARGE_INTEGER Size
    )
{
    FILE_END_OF_FILE_INFORMATION endOfFileInfo;
    IO_STATUS_BLOCK isb;

    endOfFileInfo.EndOfFile = *Size;

    return NtSetInformationFile(
        FileHandle,
        &isb,
        &endOfFileInfo,
        sizeof(FILE_END_OF_FILE_INFORMATION),
        FileEndOfFileInformation
        );
}

NTSTATUS PhpQueryTransactionManagerVariableSize(
    __in HANDLE TransactionManagerHandle,
    __in TRANSACTIONMANAGER_INFORMATION_CLASS TransactionManagerInformationClass,
    __out PPVOID Buffer
    )
{
    NTSTATUS status;
    PVOID buffer;
    ULONG bufferSize = 0x100;

    if (!NtQueryInformationTransactionManager)
        return STATUS_NOT_SUPPORTED;

    buffer = PhAllocate(bufferSize);

    while (TRUE)
    {
        status = NtQueryInformationTransactionManager(
            TransactionManagerHandle,
            TransactionManagerInformationClass,
            buffer,
            bufferSize,
            NULL
            );

        if (status == STATUS_BUFFER_OVERFLOW)
        {
            PhFree(buffer);
            bufferSize *= 2;

            if (bufferSize > 1 * 1024 * 1024)
                return STATUS_INSUFFICIENT_RESOURCES;

            buffer = PhAllocate(bufferSize);
        }
        else
        {
            break;
        }
    }

    if (NT_SUCCESS(status))
    {
        *Buffer = buffer;
    }
    else
    {
        PhFree(buffer);
    }

    return status;
}

NTSTATUS PhGetTransactionManagerBasicInformation(
    __in HANDLE TransactionManagerHandle,
    __out PTRANSACTIONMANAGER_BASIC_INFORMATION BasicInformation
    )
{
    if (NtQueryInformationTransactionManager)
    {
        return NtQueryInformationTransactionManager(
            TransactionManagerHandle,
            TransactionManagerBasicInformation,
            BasicInformation,
            sizeof(TRANSACTIONMANAGER_BASIC_INFORMATION),
            NULL
            );
    }
    else
    {
        return STATUS_NOT_SUPPORTED;
    }
}

NTSTATUS PhGetTransactionManagerLogFileName(
    __in HANDLE TransactionManagerHandle,
    __out PPH_STRING *LogFileName
    )
{
    NTSTATUS status;
    PTRANSACTIONMANAGER_LOGPATH_INFORMATION logPathInfo;

    status = PhpQueryTransactionManagerVariableSize(
        TransactionManagerHandle,
        TransactionManagerLogPathInformation,
        &logPathInfo
        );

    if (!NT_SUCCESS(status))
        return status;

    *LogFileName = PhCreateStringEx(
        logPathInfo->LogPath,
        logPathInfo->LogPathLength
        );
    PhFree(logPathInfo);

    return status;
}

NTSTATUS PhpQueryTransactionVariableSize(
    __in HANDLE TransactionHandle,
    __in TRANSACTION_INFORMATION_CLASS TransactionInformationClass,
    __out PPVOID Buffer
    )
{
    NTSTATUS status;
    PVOID buffer;
    ULONG bufferSize = 0x100;

    if (!NtQueryInformationTransaction)
        return STATUS_NOT_SUPPORTED;

    buffer = PhAllocate(bufferSize);

    while (TRUE)
    {
        status = NtQueryInformationTransaction(
            TransactionHandle,
            TransactionInformationClass,
            buffer,
            bufferSize,
            NULL
            );

        if (status == STATUS_BUFFER_OVERFLOW)
        {
            PhFree(buffer);
            bufferSize *= 2;

            if (bufferSize > 1 * 1024 * 1024)
                return STATUS_INSUFFICIENT_RESOURCES;

            buffer = PhAllocate(bufferSize);
        }
        else
        {
            break;
        }
    }

    if (NT_SUCCESS(status))
    {
        *Buffer = buffer;
    }
    else
    {
        PhFree(buffer);
    }

    return status;
}

NTSTATUS PhGetTransactionBasicInformation(
    __in HANDLE TransactionHandle,
    __out PTRANSACTION_BASIC_INFORMATION BasicInformation
    )
{
    if (NtQueryInformationTransaction)
    {
        return NtQueryInformationTransaction(
            TransactionHandle,
            TransactionBasicInformation,
            BasicInformation,
            sizeof(TRANSACTION_BASIC_INFORMATION),
            NULL
            );
    }
    else
    {
        return STATUS_NOT_SUPPORTED;
    }
}

NTSTATUS PhGetTransactionPropertiesInformation(
    __in HANDLE TransactionHandle,
    __out_opt PLARGE_INTEGER Timeout,
    __out_opt TRANSACTION_OUTCOME *Outcome,
    __out_opt PPH_STRING *Description
    )
{
    NTSTATUS status;
    PTRANSACTION_PROPERTIES_INFORMATION propertiesInfo;

    status = PhpQueryTransactionVariableSize(
        TransactionHandle,
        TransactionPropertiesInformation,
        &propertiesInfo
        );

    if (!NT_SUCCESS(status))
        return status;

    if (Timeout)
    {
        *Timeout = propertiesInfo->Timeout;
    }

    if (Outcome)
    {
        *Outcome = propertiesInfo->Outcome;
    }

    if (Description)
    {
        *Description = PhCreateStringEx(
            propertiesInfo->Description,
            propertiesInfo->DescriptionLength
            );
    }

    PhFree(propertiesInfo);

    return status;
}

NTSTATUS PhpQueryResourceManagerVariableSize(
    __in HANDLE ResourceManagerHandle,
    __in RESOURCEMANAGER_INFORMATION_CLASS ResourceManagerInformationClass,
    __out PPVOID Buffer
    )
{
    NTSTATUS status;
    PVOID buffer;
    ULONG bufferSize = 0x100;

    if (!NtQueryInformationResourceManager)
        return STATUS_NOT_SUPPORTED;

    buffer = PhAllocate(bufferSize);

    while (TRUE)
    {
        status = NtQueryInformationResourceManager(
            ResourceManagerHandle,
            ResourceManagerInformationClass,
            buffer,
            bufferSize,
            NULL
            );

        if (status == STATUS_BUFFER_OVERFLOW)
        {
            PhFree(buffer);
            bufferSize *= 2;

            if (bufferSize > 1 * 1024 * 1024)
                return STATUS_INSUFFICIENT_RESOURCES;

            buffer = PhAllocate(bufferSize);
        }
        else
        {
            break;
        }
    }

    if (NT_SUCCESS(status))
    {
        *Buffer = buffer;
    }
    else
    {
        PhFree(buffer);
    }

    return status;
}

NTSTATUS PhGetResourceManagerBasicInformation(
    __in HANDLE ResourceManagerHandle,
    __out_opt PGUID Guid,
    __out_opt PPH_STRING *Description
    )
{
    NTSTATUS status;
    PRESOURCEMANAGER_BASIC_INFORMATION basicInfo;

    status = PhpQueryResourceManagerVariableSize(
        ResourceManagerHandle,
        ResourceManagerBasicInformation,
        &basicInfo
        );

    if (!NT_SUCCESS(status))
        return status;

    if (Guid)
    {
        *Guid = basicInfo->ResourceManagerId;
    }

    if (Description)
    {
        *Description = PhCreateStringEx(
            basicInfo->Description,
            basicInfo->DescriptionLength
            );
    }

    PhFree(basicInfo);

    return status;
}

NTSTATUS PhGetEnlistmentBasicInformation(
    __in HANDLE EnlistmentHandle,
    __out PENLISTMENT_BASIC_INFORMATION BasicInformation
    )
{
    if (NtQueryInformationEnlistment)
    {
        return NtQueryInformationEnlistment(
            EnlistmentHandle,
            EnlistmentBasicInformation,
            BasicInformation,
            sizeof(ENLISTMENT_BASIC_INFORMATION),
            NULL
            );
    }
    else
    {
        return STATUS_NOT_SUPPORTED;
    }
}

typedef struct _OPEN_DRIVER_BY_BASE_ADDRESS_CONTEXT
{
    NTSTATUS Status;
    PVOID BaseAddress;
    HANDLE DriverHandle;
} OPEN_DRIVER_BY_BASE_ADDRESS_CONTEXT, *POPEN_DRIVER_BY_BASE_ADDRESS_CONTEXT;

BOOLEAN NTAPI PhpOpenDriverByBaseAddressCallback(
    __in PPH_STRING Name,
    __in PPH_STRING TypeName,
    __in_opt PVOID Context
    )
{
    static PH_STRINGREF driverDirectoryName = PH_STRINGREF_INIT(L"\\Driver\\");

    NTSTATUS status;
    POPEN_DRIVER_BY_BASE_ADDRESS_CONTEXT context = Context;
    PPH_STRING driverName;
    OBJECT_ATTRIBUTES objectAttributes;
    HANDLE driverHandle;
    DRIVER_BASIC_INFORMATION basicInfo;

    driverName = PhConcatStringRef2(&driverDirectoryName, &Name->sr);
    InitializeObjectAttributes(
        &objectAttributes,
        &driverName->us,
        0,
        NULL,
        NULL
        );

    status = KphOpenDriver(PhKphHandle, &driverHandle, &objectAttributes);
    PhDereferenceObject(driverName);

    if (!NT_SUCCESS(status))
        return TRUE;

    status = KphQueryInformationDriver(
        PhKphHandle,
        driverHandle,
        DriverBasicInformation,
        &basicInfo,
        sizeof(DRIVER_BASIC_INFORMATION),
        NULL
        );

    if (NT_SUCCESS(status))
    {
        if (basicInfo.DriverStart == context->BaseAddress)
        {
            context->Status = STATUS_SUCCESS;
            context->DriverHandle = driverHandle;

            return FALSE;
        }
    }

    NtClose(driverHandle);

    return TRUE;
}

/**
 * Opens a driver object using a base address.
 *
 * \param DriverHandle A variable which receives a 
 * handle to the driver object.
 * \param BaseAddress The base address of the driver 
 * to open.
 *
 * \retval STATUS_OBJECT_NAME_NOT_FOUND The driver could 
 * not be found.
 *
 * \remarks This function requires a valid KProcessHacker 
 * handle. 
 */
NTSTATUS PhOpenDriverByBaseAddress(
    __out PHANDLE DriverHandle,
    __in PVOID BaseAddress
    )
{
    NTSTATUS status;
    UNICODE_STRING driverDirectoryName;
    OBJECT_ATTRIBUTES objectAttributes;
    HANDLE driverDirectoryHandle;
    OPEN_DRIVER_BY_BASE_ADDRESS_CONTEXT context;

    RtlInitUnicodeString(
        &driverDirectoryName,
        L"\\Driver"
        );
    InitializeObjectAttributes(
        &objectAttributes,
        &driverDirectoryName,
        0,
        NULL,
        NULL
        );

    if (!NT_SUCCESS(status = NtOpenDirectoryObject(
        &driverDirectoryHandle,
        DIRECTORY_QUERY,
        &objectAttributes
        )))
        return status;

    context.Status = STATUS_OBJECT_NAME_NOT_FOUND;
    context.BaseAddress = BaseAddress;

    status = PhEnumDirectoryObjects(
        driverDirectoryHandle,
        PhpOpenDriverByBaseAddressCallback,
        &context
        );
    NtClose(driverDirectoryHandle);

    if (!NT_SUCCESS(status) && !NT_SUCCESS(context.Status))
        return status;

    if (NT_SUCCESS(context.Status))
    {
        *DriverHandle = context.DriverHandle;
    }

    return context.Status;
}

/**
 * Queries variable-sized information for a driver.
 * The function allocates a buffer to contain the information.
 *
 * \param DriverHandle A handle to a driver. The access required 
 * depends on the information class specified.
 * \param DriverInformationClass The information class to retrieve.
 * \param Buffer A variable which receives a pointer to a buffer 
 * containing the information. You must free the buffer using 
 * PhFree() when you no longer need it.
 *
 * \remarks This function requires a valid KProcessHacker 
 * handle.
 */
NTSTATUS PhpQueryDriverVariableSize(
    __in HANDLE DriverHandle,
    __in DRIVER_INFORMATION_CLASS DriverInformationClass,
    __out PPVOID Buffer
    )
{
    NTSTATUS status;
    PVOID buffer;
    ULONG returnLength = 0;

    KphQueryInformationDriver(
        PhKphHandle,
        DriverHandle,
        DriverInformationClass,
        NULL,
        0,
        &returnLength
        );
    buffer = PhAllocate(returnLength);
    status = KphQueryInformationDriver(
        PhKphHandle,
        DriverHandle,
        DriverInformationClass,
        buffer,
        returnLength,
        &returnLength
        );

    if (NT_SUCCESS(status))
    {
        *Buffer = buffer;
    }
    else
    {
        PhFree(buffer);
    }

    return status;
}

/**
 * Gets the service key name of a driver.
 *
 * \param DriverHandle A handle to a driver.
 * \param ServiceKeyName A variable which receives a pointer 
 * to a string containing the service key name. You must 
 * free the string using PhDereferenceObject() when you no 
 * longer need it.
 *
 * \remarks This function requires a valid KProcessHacker 
 * handle.
 */
NTSTATUS PhGetDriverServiceKeyName(
    __in HANDLE DriverHandle,
    __out PPH_STRING *ServiceKeyName
    )
{
    NTSTATUS status;
    PUNICODE_STRING unicodeString;

    if (!NT_SUCCESS(status = PhpQueryDriverVariableSize(
        DriverHandle,
        DriverServiceKeyNameInformation,
        &unicodeString
        )))
        return status;

    *ServiceKeyName = PhCreateStringEx(
        unicodeString->Buffer,
        unicodeString->Length
        );
    PhFree(unicodeString);

    return status;
}

NTSTATUS PhpUnloadDriver(
    __in PPH_STRING ServiceKeyName
    )
{
    static PH_STRINGREF fullServicesKeyName = PH_STRINGREF_INIT(L"\\Registry\\Machine\\System\\CurrentControlSet\\Services\\");

    NTSTATUS status;
    PPH_STRING fullServiceKeyName;
    HANDLE serviceKeyHandle;
    ULONG disposition;

    fullServiceKeyName = PhConcatStringRef2(&fullServicesKeyName, &ServiceKeyName->sr);

    if (NT_SUCCESS(status = PhCreateKey(
        &serviceKeyHandle,
        KEY_WRITE | DELETE,
        NULL,
        &fullServiceKeyName->sr,
        0,
        0,
        &disposition
        )))
    {
        if (disposition == REG_CREATED_NEW_KEY)
        {
            static PH_STRINGREF imagePath = PH_STRINGREF_INIT(L"\\SystemRoot\\system32\\drivers\\ntfs.sys");

            UNICODE_STRING valueName;
            ULONG dword;

            // Set up the required values.
            dword = 1;
            RtlInitUnicodeString(&valueName, L"ErrorControl");
            NtSetValueKey(serviceKeyHandle, &valueName, 0, REG_DWORD, &dword, sizeof(ULONG));
            RtlInitUnicodeString(&valueName, L"Start");
            NtSetValueKey(serviceKeyHandle, &valueName, 0, REG_DWORD, &dword, sizeof(ULONG));
            RtlInitUnicodeString(&valueName, L"Type");
            NtSetValueKey(serviceKeyHandle, &valueName, 0, REG_DWORD, &dword, sizeof(ULONG));

            // Use a bogus name.
            RtlInitUnicodeString(&valueName, L"ImagePath");
            NtSetValueKey(serviceKeyHandle, &valueName, 0, REG_SZ, imagePath.Buffer, imagePath.Length + 2);
        }

        status = NtUnloadDriver(&fullServiceKeyName->us);

        if (disposition == REG_CREATED_NEW_KEY)
        {
            // We added values, not subkeys, so this function will work correctly.
            NtDeleteKey(serviceKeyHandle);
        }

        NtClose(serviceKeyHandle);
    }

    PhDereferenceObject(fullServiceKeyName);

    return status;
}

/**
 * Unloads a driver.
 *
 * \param BaseAddress The base address of the driver. 
 * This parameter can be NULL if a value is specified 
 * in \c Name.
 * \param Name The base name of the driver. This 
 * parameter can be NULL if a value is specified in 
 * \c BaseAddress and KProcessHacker is loaded.
 *
 * \retval STATUS_INVALID_PARAMETER_MIX Both 
 * \c BaseAddress and \c Name were null, or \c Name 
 * was not specified and KProcessHacker is not loaded.
 * \retval STATUS_OBJECT_NAME_NOT_FOUND The driver 
 * could not be found.
 */
NTSTATUS PhUnloadDriver(
    __in_opt PVOID BaseAddress,
    __in_opt PWSTR Name
    )
{
    NTSTATUS status;
    HANDLE driverHandle;
    PPH_STRING serviceKeyName = NULL;

    if (!BaseAddress && !Name)
        return STATUS_INVALID_PARAMETER_MIX;
    if (!Name && !PhKphHandle)
        return STATUS_INVALID_PARAMETER_MIX;

    // Try to get the service key name by scanning the 
    // Driver directory.

    if (PhKphHandle && BaseAddress)
    {
        if (NT_SUCCESS(PhOpenDriverByBaseAddress(
            &driverHandle,
            BaseAddress
            )))
        {
            PhGetDriverServiceKeyName(driverHandle, &serviceKeyName);
            NtClose(driverHandle);
        }
    }

    // Use the base name if we didn't get the service 
    // key name.

    if (!serviceKeyName && Name)
    {
        PPH_STRING name;

        name = PhCreateString(Name);

        // Remove the extension if it is present.
        if (PhEndsWithString2(name, L".sys", TRUE))
        {
            serviceKeyName = PhSubstring(name, 0, name->Length / 2 - 4);
            PhDereferenceObject(name);
        }
        else
        {
            serviceKeyName = name;
        }
    }

    if (!serviceKeyName)
        return STATUS_OBJECT_NAME_NOT_FOUND;

    status = PhpUnloadDriver(serviceKeyName);
    PhDereferenceObject(serviceKeyName);

    return status;
}

/**
 * Duplicates a handle.
 *
 * \param SourceProcessHandle A handle to the source 
 * process. The handle must have PROCESS_DUP_HANDLE 
 * access.
 * \param SourceHandle The handle to duplicate from 
 * the source process.
 * \param TargetProcessHandle A handle to the target 
 * process. If DUPLICATE_CLOSE_SOURCE is specified 
 * in the \a Options parameter, this parameter can be 
 * NULL.
 * \param TargetHandle A variable which receives 
 * the new handle in the target process. If 
 * DUPLICATE_CLOSE_SOURCE is specified in the \a Options 
 * parameter, this parameter can be NULL.
 * \param DesiredAccess The desired access to the 
 * object referenced by the source handle.
 * \param HandleAttributes The attributes to apply 
 * to the new handle.
 * \param Options The options to use when duplicating 
 * the handle.
 */
NTSTATUS PhDuplicateObject(
    __in HANDLE SourceProcessHandle,
    __in HANDLE SourceHandle,
    __in_opt HANDLE TargetProcessHandle,
    __out_opt PHANDLE TargetHandle,
    __in ACCESS_MASK DesiredAccess,
    __in ULONG HandleAttributes,
    __in ULONG Options
    )
{
    NTSTATUS status;

    if (PhKphHandle)
    {
        status = KphDuplicateObject(
            PhKphHandle,
            SourceProcessHandle,
            SourceHandle,
            TargetProcessHandle,
            TargetHandle,
            DesiredAccess,
            HandleAttributes,
            Options
            );

        // If KPH couldn't duplicate the handle, pass through to 
        // NtDuplicateObject. This is for special objects like ALPC ports.
        if (status != STATUS_NOT_SUPPORTED)
            return status;
    }

    return NtDuplicateObject(
        SourceProcessHandle,
        SourceHandle,
        TargetProcessHandle,
        TargetHandle,
        DesiredAccess,
        HandleAttributes,
        Options
        );
}

NTSTATUS PhpEnumProcessModules(
    __in HANDLE ProcessHandle,
    __in PPHP_ENUM_PROCESS_MODULES_CALLBACK Callback,
    __in_opt PVOID Context1,
    __in_opt PVOID Context2
    )
{
    NTSTATUS status;
    PROCESS_BASIC_INFORMATION basicInfo;
    PPEB_LDR_DATA ldr;
    PEB_LDR_DATA pebLdrData;
    PLIST_ENTRY startLink;
    PLIST_ENTRY currentLink;
    ULONG dataTableEntrySize;
    LDR_DATA_TABLE_ENTRY currentEntry;
    ULONG i;

    // Get the PEB address.
    status = PhGetProcessBasicInformation(ProcessHandle, &basicInfo);

    if (!NT_SUCCESS(status))
        return status;

    // Read the address of the loader data.
    status = PhReadVirtualMemory(
        ProcessHandle,
        PTR_ADD_OFFSET(basicInfo.PebBaseAddress, FIELD_OFFSET(PEB, Ldr)),
        &ldr,
        sizeof(PVOID),
        NULL
        );

    if (!NT_SUCCESS(status))
        return status;

    // Read the loader data.
    status = PhReadVirtualMemory(
        ProcessHandle,
        ldr,
        &pebLdrData,
        sizeof(PEB_LDR_DATA),
        NULL
        );

    if (!NT_SUCCESS(status))
        return status;

    if (!pebLdrData.Initialized)
        return STATUS_UNSUCCESSFUL;

    if (WindowsVersion >= WINDOWS_7)
        dataTableEntrySize = sizeof(LDR_DATA_TABLE_ENTRY);
    else
        dataTableEntrySize = LDR_DATA_TABLE_ENTRY_SIZE_WINXP;

    // Traverse the linked list (in load order).

    i = 0;
    startLink = PTR_ADD_OFFSET(ldr, FIELD_OFFSET(PEB_LDR_DATA, InLoadOrderModuleList));
    currentLink = pebLdrData.InLoadOrderModuleList.Flink;

    while (
        currentLink != startLink &&
        i <= PH_ENUM_PROCESS_MODULES_ITERS
        )
    {
        PVOID addressOfEntry;

        addressOfEntry = CONTAINING_RECORD(currentLink, LDR_DATA_TABLE_ENTRY, InLoadOrderLinks);
        status = PhReadVirtualMemory(
            ProcessHandle,
            addressOfEntry,
            &currentEntry,
            dataTableEntrySize,
            NULL
            );

        if (!NT_SUCCESS(status))
            return status;

        // Make sure the entry is valid.
        if (currentEntry.DllBase)
        {
            // Execute the callback.
            if (!Callback(
                ProcessHandle,
                &currentEntry,
                addressOfEntry,
                Context1,
                Context2
                ))
                break;
        }

        currentLink = currentEntry.InLoadOrderLinks.Flink;
        i++;
    }

    return status;
}

BOOLEAN NTAPI PhpEnumProcessModulesCallback(
    __in HANDLE ProcessHandle,
    __in PLDR_DATA_TABLE_ENTRY Entry,
    __in PVOID AddressOfEntry,
    __in_opt PVOID Context1,
    __in_opt PVOID Context2
    )
{
    NTSTATUS status;
    BOOLEAN cont;
    PWSTR fullDllNameOriginal;
    PWSTR fullDllNameBuffer;
    PWSTR baseDllNameOriginal;
    PWSTR baseDllNameBuffer;

    // Read the full DLL name string and add a null terminator.

    fullDllNameOriginal = Entry->FullDllName.Buffer;
    fullDllNameBuffer = PhAllocate(Entry->FullDllName.Length + 2);

    if (NT_SUCCESS(status = PhReadVirtualMemory(
        ProcessHandle,
        Entry->FullDllName.Buffer,
        fullDllNameBuffer,
        Entry->FullDllName.Length,
        NULL
        )))
    {
        fullDllNameBuffer[Entry->FullDllName.Length / 2] = 0;
        Entry->FullDllName.Buffer = fullDllNameBuffer;
    }

    baseDllNameOriginal = Entry->BaseDllName.Buffer;

    // Try to use the buffer we just read in.
    if (
        NT_SUCCESS(status) &&
        (ULONG_PTR)baseDllNameOriginal >= (ULONG_PTR)fullDllNameOriginal &&
        (ULONG_PTR)baseDllNameOriginal + Entry->BaseDllName.Length >= (ULONG_PTR)baseDllNameOriginal &&
        (ULONG_PTR)baseDllNameOriginal + Entry->BaseDllName.Length <= (ULONG_PTR)fullDllNameOriginal + Entry->FullDllName.Length
        )
    {
        baseDllNameBuffer = NULL;

        Entry->BaseDllName.Buffer = (PWSTR)((ULONG_PTR)Entry->FullDllName.Buffer +
            ((ULONG_PTR)baseDllNameOriginal - (ULONG_PTR)fullDllNameOriginal));
    }
    else
    {
        // Read the base DLL name string and add a null terminator.

        baseDllNameBuffer = PhAllocate(Entry->BaseDllName.Length + 2);

        if (NT_SUCCESS(PhReadVirtualMemory(
            ProcessHandle,
            Entry->BaseDllName.Buffer,
            baseDllNameBuffer,
            Entry->BaseDllName.Length,
            NULL
            )))
        {
            baseDllNameBuffer[Entry->BaseDllName.Length / 2] = 0;
            Entry->BaseDllName.Buffer = baseDllNameBuffer;
        }
    }

    // Execute the callback.
    cont = ((PPH_ENUM_PROCESS_MODULES_CALLBACK)Context1)(Entry, Context2);

    PhFree(fullDllNameBuffer);

    if (baseDllNameBuffer)
        PhFree(baseDllNameBuffer);

    return cont;
}

/**
 * Enumerates the modules loaded by a process.
 *
 * \param ProcessHandle A handle to a process. The 
 * handle must have PROCESS_QUERY_LIMITED_INFORMATION 
 * and PROCESS_VM_READ access.
 * \param Callback A callback function which is 
 * executed for each process module.
 * \param Context A user-defined value to pass to the 
 * callback function.
 */
NTSTATUS PhEnumProcessModules(
    __in HANDLE ProcessHandle,
    __in PPH_ENUM_PROCESS_MODULES_CALLBACK Callback,
    __in_opt PVOID Context
    )
{
    return PhpEnumProcessModules(
        ProcessHandle,
        PhpEnumProcessModulesCallback,
        Callback,
        Context
        );
}

typedef struct _SET_PROCESS_MODULE_LOAD_COUNT_CONTEXT
{
    NTSTATUS Status;
    PVOID BaseAddress;
    USHORT LoadCount;
} SET_PROCESS_MODULE_LOAD_COUNT_CONTEXT, *PSET_PROCESS_MODULE_LOAD_COUNT_CONTEXT;

BOOLEAN NTAPI PhpSetProcessModuleLoadCountCallback(
    __in HANDLE ProcessHandle,
    __in PLDR_DATA_TABLE_ENTRY Entry,
    __in PVOID AddressOfEntry,
    __in_opt PVOID Context1,
    __in_opt PVOID Context2
    )
{
    PSET_PROCESS_MODULE_LOAD_COUNT_CONTEXT context = Context1;

    if (Entry->DllBase == context->BaseAddress)
    {
        context->Status = PhWriteVirtualMemory(
            ProcessHandle,
            PTR_ADD_OFFSET(AddressOfEntry, FIELD_OFFSET(LDR_DATA_TABLE_ENTRY, LoadCount)),
            &context->LoadCount,
            sizeof(USHORT),
            NULL
            );

        return FALSE;
    }

    return TRUE;
}

/**
 * Sets the load count of a process module.
 *
 * \param ProcessHandle A handle to a process. The 
 * handle must have PROCESS_QUERY_LIMITED_INFORMATION, 
 * PROCESS_VM_READ and PROCESS_VM_WRITE access.
 * \param BaseAddress The base address of a module.
 * \param LoadCount The new load count of the module.
 *
 * \retval STATUS_DLL_NOT_FOUND The module was not found.
 */
NTSTATUS PhSetProcessModuleLoadCount(
    __in HANDLE ProcessHandle,
    __in PVOID BaseAddress,
    __in USHORT LoadCount
    )
{
    NTSTATUS status;
    SET_PROCESS_MODULE_LOAD_COUNT_CONTEXT context;

    context.Status = STATUS_DLL_NOT_FOUND;
    context.BaseAddress = BaseAddress;
    context.LoadCount = LoadCount;

    status = PhpEnumProcessModules(
        ProcessHandle,
        PhpSetProcessModuleLoadCountCallback,
        &context,
        NULL
        );

    if (!NT_SUCCESS(status))
        return status;

    return context.Status;
}

NTSTATUS PhpEnumProcessModules32(
    __in HANDLE ProcessHandle,
    __in PPHP_ENUM_PROCESS_MODULES32_CALLBACK Callback,
    __in_opt PVOID Context1,
    __in_opt PVOID Context2
    )
{
    NTSTATUS status;
    PPEB32 peb;
    ULONG ldr; // PEB_LDR_DATA32 *32
    PEB_LDR_DATA32 pebLdrData;
    ULONG startLink; // LIST_ENTRY32 *32
    ULONG currentLink; // LIST_ENTRY32 *32
    LDR_DATA_TABLE_ENTRY32 currentEntry;
    ULONG i;

    // Get the 32-bit PEB address.
    status = PhGetProcessPeb32(ProcessHandle, &peb);

    if (!NT_SUCCESS(status))
        return status;

    if (!peb)
        return STATUS_NOT_SUPPORTED; // not a WOW64 process

    // Read the address of the loader data.
    status = PhReadVirtualMemory(
        ProcessHandle,
        PTR_ADD_OFFSET(peb, FIELD_OFFSET(PEB32, Ldr)),
        &ldr,
        sizeof(ULONG),
        NULL
        );

    if (!NT_SUCCESS(status))
        return status;

    // Read the loader data.
    status = PhReadVirtualMemory(
        ProcessHandle,
        UlongToPtr(ldr),
        &pebLdrData,
        sizeof(PEB_LDR_DATA32),
        NULL
        );

    if (!NT_SUCCESS(status))
        return status;

    if (!pebLdrData.Initialized)
        return STATUS_UNSUCCESSFUL;

    // Traverse the linked list (in load order).

    i = 0;
    startLink = (ULONG)(ldr + FIELD_OFFSET(PEB_LDR_DATA32, InLoadOrderModuleList));
    currentLink = pebLdrData.InLoadOrderModuleList.Flink;

    while (
        currentLink != startLink &&
        i <= PH_ENUM_PROCESS_MODULES_ITERS
        )
    {
        ULONG addressOfEntry;

        addressOfEntry = (ULONG)CONTAINING_RECORD(UlongToPtr(currentLink), LDR_DATA_TABLE_ENTRY32, InLoadOrderLinks);
        status = PhReadVirtualMemory(
            ProcessHandle,
            UlongToPtr(addressOfEntry),
            &currentEntry,
            LDR_DATA_TABLE_ENTRY_SIZE_WINXP32,
            NULL
            );

        if (!NT_SUCCESS(status))
            return status;

        // Make sure the entry is valid.
        if (currentEntry.DllBase)
        {
            // Execute the callback.
            if (!Callback(
                ProcessHandle,
                &currentEntry,
                addressOfEntry,
                Context1,
                Context2
                ))
                break;
        }

        currentLink = currentEntry.InLoadOrderLinks.Flink;
        i++;
    }

    return status;
}

BOOLEAN NTAPI PhpEnumProcessModules32Callback(
    __in HANDLE ProcessHandle,
    __in PLDR_DATA_TABLE_ENTRY32 Entry,
    __in ULONG AddressOfEntry,
    __in_opt PVOID Context1,
    __in_opt PVOID Context2
    )
{
    BOOLEAN cont;
    LDR_DATA_TABLE_ENTRY nativeEntry;
    PWSTR baseDllNameBuffer;
    PWSTR fullDllNameBuffer;

    // Convert the 32-bit entry to a native-sized entry.

    memset(&nativeEntry, 0, sizeof(LDR_DATA_TABLE_ENTRY));
    nativeEntry.DllBase = UlongToPtr(Entry->DllBase);
    nativeEntry.EntryPoint = UlongToPtr(Entry->EntryPoint);
    nativeEntry.SizeOfImage = Entry->SizeOfImage;
    UStr32ToUStr(&nativeEntry.FullDllName, &Entry->FullDllName);
    UStr32ToUStr(&nativeEntry.BaseDllName, &Entry->BaseDllName);
    nativeEntry.Flags = Entry->Flags;
    nativeEntry.LoadCount = Entry->LoadCount;
    nativeEntry.TlsIndex = Entry->TlsIndex;

    // Read the base DLL name string and add a null terminator.

    baseDllNameBuffer = PhAllocate(nativeEntry.BaseDllName.Length + 2);

    if (NT_SUCCESS(PhReadVirtualMemory(
        ProcessHandle,
        nativeEntry.BaseDllName.Buffer,
        baseDllNameBuffer,
        nativeEntry.BaseDllName.Length,
        NULL
        )))
    {
        baseDllNameBuffer[nativeEntry.BaseDllName.Length / 2] = 0;
        nativeEntry.BaseDllName.Buffer = baseDllNameBuffer;
    }

    // Read the full DLL name string and add a null terminator.

    fullDllNameBuffer = PhAllocate(nativeEntry.FullDllName.Length + 2);

    if (NT_SUCCESS(PhReadVirtualMemory(
        ProcessHandle,
        nativeEntry.FullDllName.Buffer,
        fullDllNameBuffer,
        nativeEntry.FullDllName.Length,
        NULL
        )))
    {
        fullDllNameBuffer[nativeEntry.FullDllName.Length / 2] = 0;
        nativeEntry.FullDllName.Buffer = fullDllNameBuffer;
    }

    // Execute the callback.
    cont = ((PPH_ENUM_PROCESS_MODULES_CALLBACK)Context1)(&nativeEntry, Context2);

    PhFree(baseDllNameBuffer);
    PhFree(fullDllNameBuffer);

    return cont;
}

/**
 * Enumerates the 32-bit modules loaded by a process.
 *
 * \param ProcessHandle A handle to a process. The 
 * handle must have PROCESS_QUERY_LIMITED_INFORMATION 
 * and PROCESS_VM_READ access.
 * \param Callback A callback function which is 
 * executed for each process module.
 * \param Context A user-defined value to pass to the 
 * callback function.
 *
 * \retval STATUS_NOT_SUPPORTED The process is not 
 * running under WOW64.
 *
 * \remarks Do not use this function under a 32-bit 
 * environment.
 */
NTSTATUS PhEnumProcessModules32(
    __in HANDLE ProcessHandle,
    __in PPH_ENUM_PROCESS_MODULES_CALLBACK Callback,
    __in_opt PVOID Context
    )
{
    return PhpEnumProcessModules32(
        ProcessHandle,
        PhpEnumProcessModules32Callback,
        Callback,
        Context
        );
}

BOOLEAN NTAPI PhpSetProcessModuleLoadCount32Callback(
    __in HANDLE ProcessHandle,
    __in PLDR_DATA_TABLE_ENTRY32 Entry,
    __in ULONG AddressOfEntry,
    __in_opt PVOID Context1,
    __in_opt PVOID Context2
    )
{
    PSET_PROCESS_MODULE_LOAD_COUNT_CONTEXT context = Context1;

    if (UlongToPtr(Entry->DllBase) == context->BaseAddress)
    {
        context->Status = PhWriteVirtualMemory(
            ProcessHandle,
            UlongToPtr(AddressOfEntry + FIELD_OFFSET(LDR_DATA_TABLE_ENTRY32, LoadCount)),
            &context->LoadCount,
            sizeof(USHORT),
            NULL
            );

        return FALSE;
    }

    return TRUE;
}

/**
 * Sets the load count of a 32-bit process module.
 *
 * \param ProcessHandle A handle to a process. The 
 * handle must have PROCESS_QUERY_LIMITED_INFORMATION, 
 * PROCESS_VM_READ and PROCESS_VM_WRITE access.
 * \param BaseAddress The base address of a module.
 * \param LoadCount The new load count of the module.
 *
 * \retval STATUS_DLL_NOT_FOUND The module was not found.
 * \retval STATUS_NOT_SUPPORTED The process is not 
 * running under WOW64.
 *
 * \remarks Do not use this function under a 32-bit 
 * environment.
 */
NTSTATUS PhSetProcessModuleLoadCount32(
    __in HANDLE ProcessHandle,
    __in PVOID BaseAddress,
    __in USHORT LoadCount
    )
{
    NTSTATUS status;
    SET_PROCESS_MODULE_LOAD_COUNT_CONTEXT context;

    context.Status = STATUS_DLL_NOT_FOUND;
    context.BaseAddress = BaseAddress;
    context.LoadCount = LoadCount;

    status = PhpEnumProcessModules32(
        ProcessHandle,
        PhpSetProcessModuleLoadCount32Callback,
        &context,
        NULL
        );

    if (!NT_SUCCESS(status))
        return status;

    return context.Status;
}

typedef struct _GET_PROCEDURE_ADDRESS_REMOTE_CONTEXT
{
    PH_STRINGREF FileName;
    PVOID DllBase;
} GET_PROCEDURE_ADDRESS_REMOTE_CONTEXT, *PGET_PROCEDURE_ADDRESS_REMOTE_CONTEXT;

static BOOLEAN PhpGetProcedureAddressRemoteCallback(
    __in PLDR_DATA_TABLE_ENTRY Module,
    __in_opt PVOID Context
    )
{
    PGET_PROCEDURE_ADDRESS_REMOTE_CONTEXT context = Context;
    PH_STRINGREF fullDllName;

    fullDllName.us = Module->FullDllName;

    if (PhEqualStringRef(&fullDllName, &context->FileName, TRUE))
    {
        context->DllBase = Module->DllBase;
        return FALSE;
    }

    return TRUE;
}

/**
 * Gets the address of a procedure in a process.
 *
 * \param ProcessHandle A handle to a process. The 
 * handle must have PROCESS_QUERY_LIMITED_INFORMATION 
 * and PROCESS_VM_READ access.
 * \param FileName The file name of the DLL containing 
 * the procedure.
 * \param ProcedureName The name of the procedure.
 * \param ProcedureNumber The ordinal of the procedure.
 * \param ProcedureAddress A variable which receives the 
 * address of the procedure in the address space of the 
 * process.
 * \param DllBase A variable which receives the base 
 * address of the DLL containing the procedure.
 */
NTSTATUS PhGetProcedureAddressRemote(
    __in HANDLE ProcessHandle,
    __in PWSTR FileName,
    __in_opt PSTR ProcedureName,
    __in_opt ULONG ProcedureNumber,
    __out PVOID *ProcedureAddress,
    __out_opt PVOID *DllBase
    )
{
    NTSTATUS status;
    PH_MAPPED_IMAGE mappedImage;
    PH_MAPPED_IMAGE_EXPORTS exports;
    GET_PROCEDURE_ADDRESS_REMOTE_CONTEXT context;

    if (!NT_SUCCESS(status = PhLoadMappedImage(FileName, NULL, TRUE, &mappedImage)))
        return status;

    PhInitializeStringRef(&context.FileName, FileName);
    context.DllBase = NULL;

    if (mappedImage.Magic == IMAGE_NT_OPTIONAL_HDR32_MAGIC)
    {
#ifdef _M_X64
        status = PhEnumProcessModules32(ProcessHandle, PhpGetProcedureAddressRemoteCallback, &context);
#else
        status = PhEnumProcessModules(ProcessHandle, PhpGetProcedureAddressRemoteCallback, &context);
#endif
    }
    else
    {
#ifdef _M_X64
        status = PhEnumProcessModules(ProcessHandle, PhpGetProcedureAddressRemoteCallback, &context);
#else
        status = STATUS_NOT_SUPPORTED;
#endif
    }

    if (!NT_SUCCESS(status))
        goto CleanupExit;

    if (!NT_SUCCESS(status = PhGetMappedImageExports(&exports, &mappedImage)))
        goto CleanupExit;

    status = PhGetMappedImageExportFunctionRemote(
        &exports,
        ProcedureName,
        (USHORT)ProcedureNumber,
        context.DllBase,
        ProcedureAddress
        );

    if (NT_SUCCESS(status))
    {
        if (DllBase)
            *DllBase = context.DllBase;
    }

CleanupExit:
    PhUnloadMappedImage(&mappedImage);

    return status;
}

/**
 * Enumerates the modules loaded by the kernel.
 *
 * \param Modules A variable which receives a pointer 
 * to a structure containing information about 
 * the kernel modules. You must free the structure 
 * using PhFree() when you no longer need it.
 */
NTSTATUS PhEnumKernelModules(
    __out PRTL_PROCESS_MODULES *Modules
    )
{
    NTSTATUS status;
    PVOID buffer;
    ULONG bufferSize = 2048;

    buffer = PhAllocate(bufferSize);

    status = NtQuerySystemInformation(
        SystemModuleInformation,
        buffer,
        bufferSize,
        &bufferSize
        );

    if (status == STATUS_INFO_LENGTH_MISMATCH)
    {
        PhFree(buffer);
        buffer = PhAllocate(bufferSize);

        status = NtQuerySystemInformation(
            SystemModuleInformation,
            buffer,
            bufferSize,
            &bufferSize
            );
    }

    if (!NT_SUCCESS(status))
        return status;

    *Modules = buffer;

    return status;
}

/**
 * Enumerates the modules loaded by the kernel.
 *
 * \param Modules A variable which receives a pointer 
 * to a structure containing information about 
 * the kernel modules. You must free the structure 
 * using PhFree() when you no longer need it.
 */
NTSTATUS PhEnumKernelModulesEx(
    __out PRTL_PROCESS_MODULE_INFORMATION_EX *Modules
    )
{
    NTSTATUS status;
    PVOID buffer;
    ULONG bufferSize = 2048;

    buffer = PhAllocate(bufferSize);

    status = NtQuerySystemInformation(
        SystemModuleInformationEx,
        buffer,
        bufferSize,
        &bufferSize
        );

    if (status == STATUS_INFO_LENGTH_MISMATCH)
    {
        PhFree(buffer);
        buffer = PhAllocate(bufferSize);

        status = NtQuerySystemInformation(
            SystemModuleInformationEx,
            buffer,
            bufferSize,
            &bufferSize
            );
    }

    if (!NT_SUCCESS(status))
        return status;

    *Modules = buffer;

    return status;
}

/**
 * Gets the file name of the kernel image.
 *
 * \return A pointer to a string containing the 
 * kernel image file name. You must free the string 
 * using PhDereferenceObject() when you no longer 
 * need it.
 */
PPH_STRING PhGetKernelFileName()
{
    PRTL_PROCESS_MODULES modules;
    PPH_STRING fileName = NULL;

    if (!NT_SUCCESS(PhEnumKernelModules(&modules)))
        return NULL;

    if (modules->NumberOfModules >= 1)
    {
        fileName = PhCreateStringFromAnsi(modules->Modules[0].FullPathName);
    }

    PhFree(modules);

    return fileName;
}

/**
 * Enumerates the running processes.
 *
 * \param Processes A variable which receives a 
 * pointer to a buffer containing process 
 * information. You must free the buffer using 
 * PhFree() when you no longer need it.
 *
 * \remarks You can use the \ref PH_FIRST_PROCESS 
 * and \ref PH_NEXT_PROCESS macros to process the 
 * information contained in the buffer.
 */
NTSTATUS PhEnumProcesses(
    __out PPVOID Processes
    )
{
    static ULONG initialBufferSize = 0x4000;
    NTSTATUS status;
    PVOID buffer;
    ULONG bufferSize;

    bufferSize = initialBufferSize;
    buffer = PhAllocate(bufferSize);

    while (TRUE)
    {
        status = NtQuerySystemInformation(
            SystemProcessInformation,
            buffer,
            bufferSize,
            &bufferSize
            );

        if (status == STATUS_BUFFER_TOO_SMALL || status == STATUS_INFO_LENGTH_MISMATCH)
        {
            PhFree(buffer);
            buffer = PhAllocate(bufferSize);
        }
        else
        {
            break;
        }
    }

    if (!NT_SUCCESS(status))
    {
        PhFree(buffer);
        return status;
    }

    if (bufferSize <= 0x20000) initialBufferSize = bufferSize;
    *Processes = buffer;

    return status;
}

/**
 * Enumerates the running processes for a session.
 *
 * \param Processes A variable which receives a 
 * pointer to a buffer containing process 
 * information. You must free the buffer using 
 * PhFree() when you no longer need it.
 * \param SessionId A session ID.
 *
 * \remarks You can use the \ref PH_FIRST_PROCESS 
 * and \ref PH_NEXT_PROCESS macros to process the 
 * information contained in the buffer.
 */
NTSTATUS PhEnumProcessesForSession(
    __out PPVOID Processes,
    __in ULONG SessionId
    )
{
    static ULONG initialBufferSize = 0x4000;
    NTSTATUS status;
    SYSTEM_SESSION_PROCESS_INFORMATION sessionProcessInfo;
    PVOID buffer;
    ULONG bufferSize;

    bufferSize = initialBufferSize;
    buffer = PhAllocate(bufferSize);

    sessionProcessInfo.SessionId = SessionId;

    while (TRUE)
    {
        sessionProcessInfo.SizeOfBuf = bufferSize;
        sessionProcessInfo.Buffer = buffer;

        status = NtQuerySystemInformation(
            SystemSessionProcessInformation,
            &sessionProcessInfo,
            sizeof(SYSTEM_SESSION_PROCESS_INFORMATION),
            &bufferSize // size of the inner buffer gets returned
            );

        if (status == STATUS_BUFFER_TOO_SMALL || status == STATUS_INFO_LENGTH_MISMATCH)
        {
            PhFree(buffer);
            buffer = PhAllocate(bufferSize);
        }
        else
        {
            break;
        }
    }

    if (!NT_SUCCESS(status))
    {
        PhFree(buffer);
        return status;
    }

    if (bufferSize <= 0x20000) initialBufferSize = bufferSize;
    *Processes = buffer;

    return status;
}

/**
 * Enumerates the running processes.
 *
 * \param Processes A variable which receives a 
 * pointer to a buffer containing process 
 * information. You must free the buffer using 
 * PhFree() when you no longer need it.
 *
 * \remarks You can use the \ref PH_FIRST_PROCESS 
 * and \ref PH_NEXT_PROCESS macros to process the 
 * information contained in the buffer.
 */
NTSTATUS PhEnumProcessesEx(
    __out PPVOID Processes
    )
{
    static ULONG initialBufferSize = 0x4000;
    NTSTATUS status;
    PVOID buffer;
    ULONG bufferSize;

    bufferSize = initialBufferSize;
    buffer = PhAllocate(bufferSize);

    while (TRUE)
    {
        status = NtQuerySystemInformation(
            SystemExtendedProcessInformation,
            buffer,
            bufferSize,
            &bufferSize
            );

        if (status == STATUS_BUFFER_TOO_SMALL || status == STATUS_INFO_LENGTH_MISMATCH)
        {
            PhFree(buffer);
            buffer = PhAllocate(bufferSize);
        }
        else
        {
            break;
        }
    }

    if (!NT_SUCCESS(status))
    {
        PhFree(buffer);
        return status;
    }

    if (bufferSize <= 0x20000) initialBufferSize = bufferSize;
    *Processes = buffer;

    return status;
}

/**
 * Finds the process information structure for a 
 * specific process.
 *
 * \param Processes A pointer to a buffer returned 
 * by PhEnumProcesses().
 * \param ProcessId The ID of the process.
 *
 * \return A pointer to the process information 
 * structure for the specified process, or NULL if 
 * the structure could not be found.
 */
PSYSTEM_PROCESS_INFORMATION PhFindProcessInformation(
    __in PVOID Processes,
    __in HANDLE ProcessId
    )
{
    PSYSTEM_PROCESS_INFORMATION process;

    process = PH_FIRST_PROCESS(Processes);

    do
    {
        if (process->UniqueProcessId == ProcessId)
            return process;
    } while (process = PH_NEXT_PROCESS(process));

    return NULL;
}

/**
 * Enumerates all open handles.
 *
 * \param Handles A variable which receives a pointer 
 * to a structure containing information about all 
 * opened handles. You must free the structure using 
 * PhFree() when you no longer need it.
 *
 * \retval STATUS_INSUFFICIENT_RESOURCES The 
 * handle information returned by the kernel is too 
 * large.
 */
NTSTATUS PhEnumHandles(
    __out PSYSTEM_HANDLE_INFORMATION *Handles
    )
{
    static ULONG initialBufferSize = 0x4000;
    NTSTATUS status;
    PVOID buffer;
    ULONG bufferSize;

    bufferSize = initialBufferSize;
    buffer = PhAllocate(bufferSize);

    while ((status = NtQuerySystemInformation(
        SystemHandleInformation,
        buffer,
        bufferSize,
        NULL
        )) == STATUS_INFO_LENGTH_MISMATCH)
    {
        PhFree(buffer);
        bufferSize *= 2;

        // Fail if we're resizing the buffer to something 
        // very large.
        if (bufferSize > PH_LARGE_BUFFER_SIZE)
            return STATUS_INSUFFICIENT_RESOURCES;

        buffer = PhAllocate(bufferSize);
    }

    if (!NT_SUCCESS(status))
    {
        PhFree(buffer);
        return status;
    }

    if (bufferSize <= 0x100000) initialBufferSize = bufferSize;
    *Handles = (PSYSTEM_HANDLE_INFORMATION)buffer;

    return status;
}

/**
 * Enumerates all open handles.
 *
 * \param Handles A variable which receives a pointer 
 * to a structure containing information about all 
 * opened handles. You must free the structure using 
 * PhFree() when you no longer need it.
 *
 * \retval STATUS_INSUFFICIENT_RESOURCES The 
 * handle information returned by the kernel is too 
 * large.
 *
 * \remarks This function is only available starting 
 * with Windows XP.
 */
NTSTATUS PhEnumHandlesEx(
    __out PSYSTEM_HANDLE_INFORMATION_EX *Handles
    )
{
    static ULONG initialBufferSize = 0x10000;
    NTSTATUS status;
    PVOID buffer;
    ULONG bufferSize;

    bufferSize = initialBufferSize;
    buffer = PhAllocate(bufferSize);

    while ((status = NtQuerySystemInformation(
        SystemExtendedHandleInformation,
        buffer,
        bufferSize,
        NULL
        )) == STATUS_INFO_LENGTH_MISMATCH)
    {
        PhFree(buffer);
        bufferSize *= 2;

        // Fail if we're resizing the buffer to something 
        // very large.
        if (bufferSize > PH_LARGE_BUFFER_SIZE)
            return STATUS_INSUFFICIENT_RESOURCES;

        buffer = PhAllocate(bufferSize);
    }

    if (!NT_SUCCESS(status))
    {
        PhFree(buffer);
        return status;
    }

    if (bufferSize <= 0x200000) initialBufferSize = bufferSize;
    *Handles = (PSYSTEM_HANDLE_INFORMATION_EX)buffer;

    return status;
}

/**
 * Enumerates all pagefiles.
 *
 * \param Pagefiles A variable which receives a pointer 
 * to a buffer containing information about all 
 * active pagefiles. You must free the structure using 
 * PhFree() when you no longer need it.
 *
 * \retval STATUS_INSUFFICIENT_RESOURCES The 
 * handle information returned by the kernel is too 
 * large.
 */
NTSTATUS PhEnumPagefiles(
    __out PPVOID Pagefiles
    )
{
    NTSTATUS status;
    PVOID buffer;
    ULONG bufferSize = 0x200;

    buffer = PhAllocate(bufferSize);

    while ((status = NtQuerySystemInformation(
        SystemPageFileInformation,
        buffer,
        bufferSize,
        NULL
        )) == STATUS_INFO_LENGTH_MISMATCH)
    {
        PhFree(buffer);
        bufferSize *= 2;

        // Fail if we're resizing the buffer to something 
        // very large.
        if (bufferSize > PH_LARGE_BUFFER_SIZE)
            return STATUS_INSUFFICIENT_RESOURCES;

        buffer = PhAllocate(bufferSize);
    }

    if (!NT_SUCCESS(status))
    {
        PhFree(buffer);
        return status;
    }

    *Pagefiles = buffer;

    return status;
}

/**
 * Gets the file name of a process' image.
 *
 * \param ProcessId The ID of the process.
 * \param FileName A variable which receives a pointer to a 
 * string containing the file name. You must free the string 
 * using PhDereferenceObject() when you no longer need it.
 *
 * \remarks This function only works on Windows Vista and 
 * above. There does not appear to be any access checking 
 * performed by the kernel for this.
 */
NTSTATUS PhGetProcessImageFileNameByProcessId(
    __in HANDLE ProcessId,
    __out PPH_STRING *FileName
    )
{
    NTSTATUS status;
    PVOID buffer;
    ULONG bufferSize = 0x100;
    SYSTEM_PROCESS_ID_INFORMATION processIdInfo;

    buffer = PhAllocate(bufferSize);

    processIdInfo.ProcessId = ProcessId;
    processIdInfo.ImageName.Length = 0;
    processIdInfo.ImageName.MaximumLength = (USHORT)bufferSize;
    processIdInfo.ImageName.Buffer = buffer;

    status = NtQuerySystemInformation(
        SystemProcessIdInformation,
        &processIdInfo,
        sizeof(SYSTEM_PROCESS_ID_INFORMATION),
        NULL
        );

    if (status == STATUS_INFO_LENGTH_MISMATCH)
    {
        // Required length is stored in MaximumLength.

        PhFree(buffer);
        buffer = PhAllocate(processIdInfo.ImageName.MaximumLength);
        processIdInfo.ImageName.Buffer = buffer;

        status = NtQuerySystemInformation(
            SystemProcessIdInformation,
            &processIdInfo,
            sizeof(SYSTEM_PROCESS_ID_INFORMATION),
            NULL
            );
    }

    if (!NT_SUCCESS(status))
    {
        PhFree(buffer);
        return status;
    }

    *FileName = PhCreateStringEx(processIdInfo.ImageName.Buffer, processIdInfo.ImageName.Length);
    PhFree(buffer);

    return status;
}

typedef struct _GET_PROCESS_IS_DOT_NET_CONTEXT
{
    HANDLE ProcessId;
    PPH_STRING SectionName;
    PPH_STRING SectionNameV4;
    BOOLEAN Found;
} GET_PROCESS_IS_DOT_NET_CONTEXT, *PGET_PROCESS_IS_DOT_NET_CONTEXT;

BOOLEAN NTAPI PhpGetProcessIsDotNetCallback(
    __in PPH_STRING Name,
    __in PPH_STRING TypeName,
    __in_opt PVOID Context
    )
{
    PGET_PROCESS_IS_DOT_NET_CONTEXT context = Context;

    if (PhEqualString2(TypeName, L"Section", TRUE) &&
        (PhEqualString(Name, context->SectionName, TRUE) ||
        PhEqualString(Name, context->SectionNameV4, TRUE))
        )
    {
        context->Found = TRUE;
        return FALSE;
    }

    return TRUE;
}

/**
 * Determines if a process is managed.
 *
 * \param ProcessId The ID of the process.
 * \param IsDotNet A variable which receives a boolean indicating 
 * whether the process is managed.
 */
NTSTATUS PhGetProcessIsDotNet(
    __in HANDLE ProcessId,
    __out PBOOLEAN IsDotNet
    )
{
    // All .NET processes have a handle open to a section named 
    // \BaseNamedObjects\Cor_Private_IPCBlock(_v4)_<ProcessId>.
    // This is the same object used by the ICorPublish::GetProcess 
    // function. Instead of calling that function, we simply check 
    // for the existence of that section object. This means:
    // * Better performance.
    // * No need for admin rights to get .NET status of processes 
    //   owned by other users.

    NTSTATUS status;
    OBJECT_ATTRIBUTES oa;
    UNICODE_STRING directoryName;
    HANDLE directoryHandle;
    GET_PROCESS_IS_DOT_NET_CONTEXT context;

    RtlInitUnicodeString(&directoryName, L"\\BaseNamedObjects");
    InitializeObjectAttributes(
        &oa,
        &directoryName,
        OBJ_CASE_INSENSITIVE,
        NULL,
        NULL
        );
    status = NtOpenDirectoryObject(
        &directoryHandle,
        DIRECTORY_QUERY,
        &oa
        );

    if (!NT_SUCCESS(status))
        return status;

    context.ProcessId = ProcessId;
    context.SectionName = PhFormatString(L"Cor_Private_IPCBlock_%u", (ULONG)ProcessId);
    context.SectionNameV4 = PhFormatString(L"Cor_Private_IPCBlock_v4_%u", (ULONG)ProcessId);
    context.Found = FALSE;

    PhEnumDirectoryObjects(
        directoryHandle,
        PhpGetProcessIsDotNetCallback,
        &context
        );

    PhDereferenceObject(context.SectionName);
    PhDereferenceObject(context.SectionNameV4);

    NtClose(directoryHandle);

    *IsDotNet = context.Found;

    return status;
}

typedef struct _PH_IS_DOT_NET_ENTRY
{
    ULONG Next; // can't use pointer; if the entries array is resized, the pointer becomes invalid
    ULONG Flags;
    HANDLE ProcessId;
} PH_IS_DOT_NET_ENTRY, *PPH_IS_DOT_NET_ENTRY;

typedef struct _PH_IS_DOT_NET_CONTEXT
{
    PPH_IS_DOT_NET_ENTRY Entries;
    ULONG NumberOfEntries;
    ULONG NumberOfAllocatedEntries;
    ULONG Buckets[16];
} PH_IS_DOT_NET_CONTEXT, *PPH_IS_DOT_NET_CONTEXT;

BOOLEAN NTAPI PhpCreateIsDotNetContextCallback(
    __in PPH_STRING Name,
    __in PPH_STRING TypeName,
    __in_opt PVOID Context
    )
{
    static PH_STRINGREF prefix = PH_STRINGREF_INIT(L"Cor_Private_IPCBlock_");
    static PH_STRINGREF prefixAddV4 = PH_STRINGREF_INIT(L"v4_");

    PPH_IS_DOT_NET_CONTEXT context = Context;

    if (
        PhEqualString2(TypeName, L"Section", TRUE) &&
        PhStartsWithStringRef(&Name->sr, &prefix, TRUE)
        )
    {
        PPH_IS_DOT_NET_ENTRY entry;
        ULONG flags;
        PH_STRINGREF name;
        ULONG64 processId;
        ULONG entryIndex;
        ULONG index;

        flags = 0;

        name = Name->sr;
        name.Buffer += prefix.Length / sizeof(WCHAR);
        name.Length -= prefix.Length;

        if (PhStartsWithStringRef(&name, &prefixAddV4, TRUE))
        {
            flags |= PH_IS_DOT_NET_VERSION_4;
            name.Buffer += prefixAddV4.Length / sizeof(WCHAR);
            name.Length -= prefixAddV4.Length;
        }

        if (PhStringToInteger64(&name, 10, &processId))
        {
            if (context->NumberOfEntries == context->NumberOfAllocatedEntries)
            {
                context->NumberOfAllocatedEntries *= 2;
                context->Entries = PhReAllocate(
                    context->Entries,
                    context->NumberOfAllocatedEntries * sizeof(PH_IS_DOT_NET_ENTRY)
                    );
            }

            entryIndex = context->NumberOfEntries++;
            entry = &context->Entries[entryIndex];
            entry->Flags = flags;
            entry->ProcessId = (HANDLE)processId;

            index = ((ULONG)processId / 4) & (sizeof(context->Buckets) / sizeof(ULONG) - 1);
            entry->Next = context->Buckets[index];
            context->Buckets[index] = entryIndex;
        }
    }

    return TRUE;
}

NTSTATUS PhCreateIsDotNetContext(
    __out PPH_IS_DOT_NET_CONTEXT *IsDotNetContext,
    __in_opt PPH_STRINGREF DirectoryNames,
    __in ULONG NumberOfDirectoryNames
    )
{
    NTSTATUS status;
    PPH_IS_DOT_NET_CONTEXT isDotNetContext;
    OBJECT_ATTRIBUTES oa;
    HANDLE directoryHandle;
    PH_STRINGREF defaultDirectoryName;
    ULONG i;

    isDotNetContext = PhAllocate(sizeof(PH_IS_DOT_NET_CONTEXT));
    isDotNetContext->NumberOfEntries = 0;
    isDotNetContext->NumberOfAllocatedEntries = 16;
    isDotNetContext->Entries = PhAllocate(isDotNetContext->NumberOfAllocatedEntries * sizeof(PH_IS_DOT_NET_ENTRY));
    memset(isDotNetContext->Buckets, -1, sizeof(isDotNetContext->Buckets));

    if (!DirectoryNames || NumberOfDirectoryNames == 0)
    {
        PhInitializeStringRef(&defaultDirectoryName, L"\\BaseNamedObjects");
        DirectoryNames = &defaultDirectoryName;
        NumberOfDirectoryNames = 1;
    }

    for (i = 0; i < NumberOfDirectoryNames; i++)
    {
        InitializeObjectAttributes(
            &oa,
            &DirectoryNames[i].us,
            OBJ_CASE_INSENSITIVE,
            NULL,
            NULL
            );
        status = NtOpenDirectoryObject(
            &directoryHandle,
            DIRECTORY_QUERY,
            &oa
            );

        if (NT_SUCCESS(status))
        {
            PhEnumDirectoryObjects(
                directoryHandle,
                PhpCreateIsDotNetContextCallback,
                isDotNetContext
                );

            NtClose(directoryHandle);
        }
    }

    *IsDotNetContext = isDotNetContext;

    return STATUS_SUCCESS;
}

VOID PhFreeIsDotNetContext(
    __inout PPH_IS_DOT_NET_CONTEXT IsDotNetContext
    )
{
    PhFree(IsDotNetContext->Entries);
    PhFree(IsDotNetContext);
}

BOOLEAN PhGetProcessIsDotNetFromContext(
    __in PPH_IS_DOT_NET_CONTEXT IsDotNetContext,
    __in HANDLE ProcessId,
    __out_opt PULONG Flags
    )
{
    PPH_IS_DOT_NET_ENTRY entry;
    ULONG index;
    ULONG i;

    index = ((ULONG)ProcessId / 4) & (sizeof(IsDotNetContext->Buckets) / sizeof(ULONG) - 1);

    for (i = IsDotNetContext->Buckets[index]; i != -1; i = entry->Next)
    {
        entry = &IsDotNetContext->Entries[i];

        if (entry->ProcessId == ProcessId)
        {
            if (Flags)
                *Flags = entry->Flags;

            return TRUE;
        }
    }

    return FALSE;
}

/**
 * Enumerates the objects in a directory object.
 *
 * \param DirectoryHandle A handle to a directory. The 
 * handle must have DIRECTORY_QUERY access.
 * \param Callback A callback function which is 
 * executed for each object.
 * \param Context A user-defined value to pass to the 
 * callback function.
 */
NTSTATUS PhEnumDirectoryObjects(
    __in HANDLE DirectoryHandle,
    __in PPH_ENUM_DIRECTORY_OBJECTS Callback,
    __in_opt PVOID Context
    )
{
    NTSTATUS status;
    ULONG context = 0;
    BOOLEAN firstTime = TRUE;
    ULONG bufferSize;
    POBJECT_DIRECTORY_INFORMATION buffer;
    ULONG i;
    BOOLEAN cont;

    bufferSize = 0x200;
    buffer = PhAllocate(bufferSize);

    while (TRUE)
    {
        // Get a batch of entries.

        while ((status = NtQueryDirectoryObject(
            DirectoryHandle,
            buffer,
            bufferSize,
            FALSE,
            firstTime,
            &context,
            NULL
            )) == STATUS_MORE_ENTRIES)
        {
            // Check if we have at least one entry. If not, 
            // we'll double the buffer size and try again.
            if (buffer[0].Name.Buffer)
                break;

            // Make sure we don't use too much memory.
            if (bufferSize > PH_LARGE_BUFFER_SIZE)
            {
                PhFree(buffer);
                return STATUS_INSUFFICIENT_RESOURCES;
            }

            PhFree(buffer);
            bufferSize *= 2;
            buffer = PhAllocate(bufferSize);
        }

        if (!NT_SUCCESS(status))
        {
            PhFree(buffer);
            return status;
        }

        // Read the batch and execute the callback function 
        // for each object.

        i = 0;
        cont = TRUE;

        while (TRUE)
        {
            POBJECT_DIRECTORY_INFORMATION info;
            PPH_STRING name;
            PPH_STRING typeName;

            info = &buffer[i];

            if (!info->Name.Buffer)
                break;

            name = PhCreateStringEx(info->Name.Buffer, info->Name.Length);
            typeName = PhCreateStringEx(info->TypeName.Buffer, info->TypeName.Length);  

            cont = Callback(name, typeName, Context);

            PhDereferenceObject(name);
            PhDereferenceObject(typeName);

            if (!cont)
                break;

            i++;
        }

        if (!cont)
            break;

        if (status != STATUS_MORE_ENTRIES)
            break;

        firstTime = FALSE;
    }

    PhFree(buffer);

    return STATUS_SUCCESS;
}

NTSTATUS PhEnumDirectoryFile(
    __in HANDLE FileHandle,
    __in_opt PPH_STRINGREF SearchPattern,
    __in PPH_ENUM_DIRECTORY_FILE Callback,
    __in_opt PVOID Context
    )
{
    NTSTATUS status;
    IO_STATUS_BLOCK isb;
    BOOLEAN firstTime = TRUE;
    PVOID buffer;
    ULONG bufferSize = 0x400;
    ULONG i;
    BOOLEAN cont;

    buffer = PhAllocate(bufferSize);

    while (TRUE)
    {
        // Query the directory, doubling the buffer each time NtQueryDirectoryFile 
        // fails.
        while (TRUE)
        {
            status = NtQueryDirectoryFile(
                FileHandle,
                NULL,
                NULL,
                NULL,
                &isb,
                buffer,
                bufferSize,
                FileDirectoryInformation,
                FALSE,
                SearchPattern ? &SearchPattern->us : NULL,
                firstTime
                );

            // Our ISB is on the stack, so we have to wait for the operation to 
            // complete before continuing.
            if (status == STATUS_PENDING)
            {
                status = NtWaitForSingleObject(FileHandle, FALSE, NULL);

                if (NT_SUCCESS(status))
                    status = isb.Status;
            }

            if (status == STATUS_BUFFER_OVERFLOW || status == STATUS_INFO_LENGTH_MISMATCH)
            {
                PhFree(buffer);
                bufferSize *= 2;
                buffer = PhAllocate(bufferSize);
            }
            else
            {
                break;
            }
        }

        // If we don't have any entries to read, exit.
        if (status == STATUS_NO_MORE_FILES)
        {
            status = STATUS_SUCCESS;
            break;
        }

        if (!NT_SUCCESS(status))
            break;

        // Read the batch and execute the callback function 
        // for each file.

        i = 0;
        cont = TRUE;

        while (TRUE)
        {
            PFILE_DIRECTORY_INFORMATION information;

            information = (PFILE_DIRECTORY_INFORMATION)(PTR_ADD_OFFSET(buffer, i));

            if (!Callback(
                information,
                Context
                ))
            {
                cont = FALSE;
                break;
            }

            if (information->NextEntryOffset != 0)
                i += information->NextEntryOffset;
            else
                break;
        }

        if (!cont)
            break;

        firstTime = FALSE;
    }

    PhFree(buffer);

    return status;
}

NTSTATUS PhEnumFileStreams(
    __in HANDLE FileHandle,
    __out PPVOID Streams
    )
{
    return PhpQueryFileVariableSize(
        FileHandle,
        FileStreamInformation,
        Streams
        );
}

/**
 * Initializes the device prefixes module.
 */
VOID PhInitializeDevicePrefixes()
{
    ULONG i;
    PUCHAR buffer;

    // Allocate one buffer for all 26 prefixes to reduce overhead.
    buffer = PhAllocate(PH_DEVICE_PREFIX_LENGTH * sizeof(WCHAR) * 26);

    for (i = 0; i < 26; i++)
    {
        PhDevicePrefixes[i].Length = 0;
        PhDevicePrefixes[i].us.MaximumLength = PH_DEVICE_PREFIX_LENGTH * sizeof(WCHAR);
        PhDevicePrefixes[i].Buffer = (PWSTR)buffer;
        buffer += PH_DEVICE_PREFIX_LENGTH * sizeof(WCHAR);
    }
}

VOID PhRefreshMupDevicePrefixes()
{
    static PH_STRINGREF orderKeyName = PH_STRINGREF_INIT(L"System\\CurrentControlSet\\Control\\NetworkProvider\\Order");
    static PH_STRINGREF servicesStringPart = PH_STRINGREF_INIT(L"System\\CurrentControlSet\\Services\\");
    static PH_STRINGREF networkProviderStringPart = PH_STRINGREF_INIT(L"\\NetworkProvider");

    HANDLE orderKeyHandle;
    PPH_STRING providerOrder = NULL;
    ULONG i;
    PH_STRINGREF remainingPart;
    PH_STRINGREF part;

    // The provider names are stored in the ProviderOrder value in this key:
    // HKLM\System\CurrentControlSet\Control\NetworkProvider\Order
    // Each name can then be looked up, its device name in the DeviceName value in:
    // HKLM\System\CurrentControlSet\Services\<ProviderName>\NetworkProvider

    // Note that we assume the providers only claim their device name. Some providers 
    // such as DFS claim an extra part, and are not resolved correctly here.

    if (NT_SUCCESS(PhOpenKey(
        &orderKeyHandle,
        KEY_READ,
        PH_KEY_LOCAL_MACHINE,
        &orderKeyName,
        0
        )))
    {
        providerOrder = PhQueryRegistryString(orderKeyHandle, L"ProviderOrder");
        NtClose(orderKeyHandle);
    }

    if (!providerOrder)
        return;

    PhAcquireQueuedLockExclusive(&PhDeviceMupPrefixesLock);

    for (i = 0; i < PhDeviceMupPrefixesCount; i++)
    {
        PhDereferenceObject(PhDeviceMupPrefixes[i]);
        PhDeviceMupPrefixes[i] = NULL;
    }

    PhDeviceMupPrefixesCount = 0;

    PhDeviceMupPrefixes[PhDeviceMupPrefixesCount++] = PhCreateString(L"\\Device\\Mup");

    // DFS claims an extra part of file names, which we don't handle.
    /*if (WindowsVersion >= WINDOWS_VISTA)
        PhDeviceMupPrefixes[PhDeviceMupPrefixesCount++] = PhCreateString(L"\\Device\\DfsClient");
    else
        PhDeviceMupPrefixes[PhDeviceMupPrefixesCount++] = PhCreateString(L"\\Device\\WinDfs");*/

    remainingPart = providerOrder->sr;

    while (remainingPart.Length != 0)
    {
        PPH_STRING serviceKeyName;
        HANDLE networkProviderKeyHandle;
        PPH_STRING deviceName;

        if (PhDeviceMupPrefixesCount == PH_DEVICE_MUP_PREFIX_MAX_COUNT)
            break;

        PhSplitStringRefAtChar(&remainingPart, ',', &part, &remainingPart);

        if (part.Length != 0)
        {
            serviceKeyName = PhConcatStringRef3(&servicesStringPart, &part, &networkProviderStringPart);

            if (NT_SUCCESS(PhOpenKey(
                &networkProviderKeyHandle,
                KEY_READ,
                PH_KEY_LOCAL_MACHINE,
                &serviceKeyName->sr,
                0
                )))
            {
                if (deviceName = PhQueryRegistryString(networkProviderKeyHandle, L"DeviceName"))
                {
                    PhDeviceMupPrefixes[PhDeviceMupPrefixesCount] = deviceName;
                    PhDeviceMupPrefixesCount++;
                }

                NtClose(networkProviderKeyHandle);
            }

            PhDereferenceObject(serviceKeyName);
        }
    }

    PhReleaseQueuedLockExclusive(&PhDeviceMupPrefixesLock);

    PhDereferenceObject(providerOrder);
}

/**
 * Refreshes the DOS device names array.
 */
VOID PhRefreshDosDevicePrefixes()
{
    WCHAR deviceNameBuffer[7] = L"\\??\\ :";
    ULONG i;

    for (i = 0; i < 26; i++)
    {
        HANDLE linkHandle;
        OBJECT_ATTRIBUTES oa;
        UNICODE_STRING deviceName;

        deviceNameBuffer[4] = (WCHAR)('A' + i);
        deviceName.Buffer = deviceNameBuffer;
        deviceName.Length = 6 * sizeof(WCHAR);

        InitializeObjectAttributes(
            &oa,
            &deviceName,
            OBJ_CASE_INSENSITIVE,
            NULL,
            NULL
            );

        if (NT_SUCCESS(NtOpenSymbolicLinkObject(
            &linkHandle,
            SYMBOLIC_LINK_QUERY,
            &oa
            )))
        {
            PhAcquireQueuedLockExclusive(&PhDevicePrefixesLock);

            if (!NT_SUCCESS(NtQuerySymbolicLinkObject(
                linkHandle,
                &PhDevicePrefixes[i].us,
                NULL
                )))
            {
                PhDevicePrefixes[i].Length = 0;
            }

            PhReleaseQueuedLockExclusive(&PhDevicePrefixesLock);

            NtClose(linkHandle);
        }
        else
        {
            PhDevicePrefixes[i].Length = 0;
        }
    }
}

/**
 * Resolves a NT path into a Win32 path.
 *
 * \param Name A string containing the path to resolve.
 *
 * \return A pointer to a string containing the Win32 
 * path. You must free the string using PhDereferenceObject() 
 * when you no longer need it.
 */
PPH_STRING PhResolveDevicePrefix(
    __in PPH_STRING Name
    )
{
    ULONG i;
    PPH_STRING newName = NULL;

    if (PhBeginInitOnce(&PhDevicePrefixesInitOnce))
    {
        PhInitializeDevicePrefixes();
        PhRefreshDosDevicePrefixes();
        PhRefreshMupDevicePrefixes();

        PhEndInitOnce(&PhDevicePrefixesInitOnce);
    }

    // Go through the DOS devices and try to find a matching prefix.
    for (i = 0; i < 26; i++)
    {
        BOOLEAN isPrefix = FALSE;
        ULONG prefixLength;

        PhAcquireQueuedLockShared(&PhDevicePrefixesLock);

        prefixLength = PhDevicePrefixes[i].Length;

        if (prefixLength != 0)
            isPrefix = PhStartsWithStringRef(&Name->sr, &PhDevicePrefixes[i], TRUE);

        PhReleaseQueuedLockShared(&PhDevicePrefixesLock);

        if (isPrefix)
        {
            // <letter>:path
            newName = PhCreateStringEx(NULL, 2 * sizeof(WCHAR) + Name->Length - prefixLength);
            newName->Buffer[0] = (WCHAR)('A' + i);
            newName->Buffer[1] = ':';
            memcpy(
                &newName->Buffer[2],
                &Name->Buffer[prefixLength / sizeof(WCHAR)],
                Name->Length - prefixLength
                );

            break;
        }
    }

    if (i == 26)
    {
        // Resolve network providers.

        PhAcquireQueuedLockShared(&PhDeviceMupPrefixesLock);

        for (i = 0; i < PhDeviceMupPrefixesCount; i++)
        {
            BOOLEAN isPrefix = FALSE;
            ULONG prefixLength;

            prefixLength = PhDeviceMupPrefixes[i]->Length;

            if (prefixLength != 0)
                isPrefix = PhStartsWithString(Name, PhDeviceMupPrefixes[i], TRUE);

            if (isPrefix)
            {
                // Don't resolve if the name *is* the prefix. Otherwise, we will end up 
                // with a useless string like "\".
                if (Name->Length - prefixLength != 0)
                {
                    // \path
                    newName = PhCreateStringEx(NULL, 1 * sizeof(WCHAR) + Name->Length - prefixLength);
                    newName->Buffer[0] = '\\';
                    memcpy(
                        &newName->Buffer[1],
                        &Name->Buffer[prefixLength / sizeof(WCHAR)],
                        Name->Length - prefixLength
                        );
                }

                break;
            }
        }

        PhReleaseQueuedLockShared(&PhDeviceMupPrefixesLock);
    }

    return newName;
}

/**
 * Converts a file name into Win32 format.
 *
 * \param FileName A string containing a file name.
 *
 * \return A pointer to a string containing the Win32 
 * file name. You must free the string using 
 * PhDereferenceObject() when you no longer need it.
 *
 * \remarks This function may convert NT object 
 * name paths to invalid ones. If the path to be 
 * converted is not necessarily a file name, use 
 * PhResolveDevicePrefix().
 */
PPH_STRING PhGetFileName(
    __in PPH_STRING FileName
    )
{
    PPH_STRING newFileName;

    newFileName = FileName;

    // "\??\" refers to \GLOBAL??. Just remove it.
    if (PhStartsWithString2(FileName, L"\\??\\", FALSE))
    {
        newFileName = PhCreateStringEx(NULL, FileName->Length - 8);
        memcpy(newFileName->Buffer, &FileName->Buffer[4], FileName->Length - 8);
    }
    // "\SystemRoot" means "C:\Windows".
    else if (PhStartsWithString2(FileName, L"\\SystemRoot", TRUE))
    {
        ULONG systemRootLength;

        systemRootLength = (ULONG)wcslen(USER_SHARED_DATA->NtSystemRoot);
        newFileName = PhCreateStringEx(NULL, systemRootLength * 2 + FileName->Length - 22);
        memcpy(newFileName->Buffer, USER_SHARED_DATA->NtSystemRoot, systemRootLength * 2);
        memcpy(&newFileName->Buffer[systemRootLength], &FileName->Buffer[11], FileName->Length - 22);
    }
    else if (FileName->Length != 0 && FileName->Buffer[0] == '\\')
    {
        PPH_STRING resolvedName;

        resolvedName = PhResolveDevicePrefix(FileName);

        if (resolvedName)
        {
            newFileName = resolvedName;
        }
        else
        {
            // We didn't find a match.
            // If the file name starts with "\Windows", prepend the system drive.
            if (PhStartsWithString2(newFileName, L"\\Windows", TRUE))
            {
                newFileName = PhCreateStringEx(NULL, FileName->Length + 4);
                newFileName->Buffer[0] = USER_SHARED_DATA->NtSystemRoot[0];
                newFileName->Buffer[1] = ':';
                memcpy(&newFileName->Buffer[2], FileName->Buffer, FileName->Length);
            }
            else
            {
                PhReferenceObject(newFileName);
            }
        }
    }
    else
    {
        // Just return the supplied file name. Note that we need 
        // to add a reference.
        PhReferenceObject(newFileName);
    }

    return newFileName;
}

typedef struct _ENUM_GENERIC_PROCESS_MODULES_CONTEXT
{
    PPH_ENUM_GENERIC_MODULES_CALLBACK Callback;
    PVOID Context;
    ULONG Type;
    PPH_LIST BaseAddressList;

    ULONG LoadOrderIndex;
} ENUM_GENERIC_PROCESS_MODULES_CONTEXT, *PENUM_GENERIC_PROCESS_MODULES_CONTEXT;

static BOOLEAN EnumGenericProcessModulesCallback(
    __in PLDR_DATA_TABLE_ENTRY Module,
    __in_opt PVOID Context
    )
{
    PENUM_GENERIC_PROCESS_MODULES_CONTEXT context;
    PH_MODULE_INFO moduleInfo;
    PPH_STRING fileName;
    BOOLEAN cont;

    context = (PENUM_GENERIC_PROCESS_MODULES_CONTEXT)Context;

    // Check if we have a duplicate base address.
    if (PhFindItemList(context->BaseAddressList, Module->DllBase) != -1)
    {
        return TRUE;
    }
    else
    {
        PhAddItemList(context->BaseAddressList, Module->DllBase);
    }

    fileName = PhCreateStringEx(
        Module->FullDllName.Buffer,
        Module->FullDllName.Length
        );

    moduleInfo.Type = context->Type;
    moduleInfo.BaseAddress = Module->DllBase;
    moduleInfo.Size = Module->SizeOfImage;
    moduleInfo.EntryPoint = Module->EntryPoint;
    moduleInfo.Flags = Module->Flags;
    moduleInfo.Name = PhCreateStringEx(
        Module->BaseDllName.Buffer,
        Module->BaseDllName.Length
        );
    moduleInfo.FileName = PhGetFileName(fileName);
    moduleInfo.LoadOrderIndex = (USHORT)(context->LoadOrderIndex++);
    moduleInfo.LoadCount = Module->LoadCount;

    PhDereferenceObject(fileName);

    cont = context->Callback(&moduleInfo, context->Context);

    PhDereferenceObject(moduleInfo.Name);
    PhDereferenceObject(moduleInfo.FileName);

    return cont;
}

VOID PhpRtlModulesToGenericModules(
    __in PRTL_PROCESS_MODULES Modules,
    __in PPH_ENUM_GENERIC_MODULES_CALLBACK Callback,
    __in_opt PVOID Context,
    __in PPH_LIST BaseAddressList
    )
{
    PRTL_PROCESS_MODULE_INFORMATION module;
    ULONG i;
    PH_MODULE_INFO moduleInfo;
    BOOLEAN cont;

    for (i = 0; i < Modules->NumberOfModules; i++)
    {
        PPH_STRING fileName;

        module = &Modules->Modules[i];

        // Check if we have a duplicate base address.
        if (PhFindItemList(BaseAddressList, module->ImageBase) != -1)
        {
            continue;
        }
        else
        {
            PhAddItemList(BaseAddressList, module->ImageBase);
        }

        fileName = PhCreateStringFromAnsi(module->FullPathName);

        if ((ULONG_PTR)module->ImageBase <= PhSystemBasicInformation.MaximumUserModeAddress)
            moduleInfo.Type = PH_MODULE_TYPE_MODULE;
        else
            moduleInfo.Type = PH_MODULE_TYPE_KERNEL_MODULE;

        moduleInfo.BaseAddress = module->ImageBase;
        moduleInfo.Size = module->ImageSize;
        moduleInfo.EntryPoint = NULL;
        moduleInfo.Flags = module->Flags;
        moduleInfo.Name = PhCreateStringFromAnsi(&module->FullPathName[module->OffsetToFileName]);
        moduleInfo.FileName = PhGetFileName(fileName); // convert to DOS file name
        moduleInfo.LoadOrderIndex = module->LoadOrderIndex;
        moduleInfo.LoadCount = module->LoadCount;

        PhDereferenceObject(fileName);

        cont = Callback(&moduleInfo, Context);

        PhDereferenceObject(moduleInfo.Name);
        PhDereferenceObject(moduleInfo.FileName);

        if (!cont)
            break;
    }
}

VOID PhpRtlModulesExToGenericModules(
    __in PRTL_PROCESS_MODULE_INFORMATION_EX Modules,
    __in PPH_ENUM_GENERIC_MODULES_CALLBACK Callback,
    __in_opt PVOID Context,
    __in PPH_LIST BaseAddressList
    )
{
    PRTL_PROCESS_MODULE_INFORMATION_EX module;
    PH_MODULE_INFO moduleInfo;
    BOOLEAN cont;

    module = Modules;

    while (module->NextOffset != 0)
    {
        PPH_STRING fileName;

        // Check if we have a duplicate base address.
        if (PhFindItemList(BaseAddressList, module->BaseInfo.ImageBase) != -1)
        {
            continue;
        }
        else
        {
            PhAddItemList(BaseAddressList, module->BaseInfo.ImageBase);
        }

        fileName = PhCreateStringFromAnsi(module->BaseInfo.FullPathName);

        if ((ULONG_PTR)module->BaseInfo.ImageBase <= PhSystemBasicInformation.MaximumUserModeAddress)
            moduleInfo.Type = PH_MODULE_TYPE_MODULE;
        else
            moduleInfo.Type = PH_MODULE_TYPE_KERNEL_MODULE;

        moduleInfo.BaseAddress = module->BaseInfo.ImageBase;
        moduleInfo.Size = module->BaseInfo.ImageSize;
        moduleInfo.EntryPoint = NULL;
        moduleInfo.Flags = module->BaseInfo.Flags;
        moduleInfo.Name = PhCreateStringFromAnsi(&module->BaseInfo.FullPathName[module->BaseInfo.OffsetToFileName]);
        moduleInfo.FileName = PhGetFileName(fileName); // convert to DOS file name
        moduleInfo.LoadOrderIndex = module->BaseInfo.LoadOrderIndex;
        moduleInfo.LoadCount = module->BaseInfo.LoadCount;

        PhDereferenceObject(fileName);

        cont = Callback(&moduleInfo, Context);

        PhDereferenceObject(moduleInfo.Name);
        PhDereferenceObject(moduleInfo.FileName);

        if (!cont)
            break;

        module = PTR_ADD_OFFSET(module, module->NextOffset);
    }
}

VOID PhpEnumGenericMappedFiles(
    __in HANDLE ProcessHandle,
    __in PPH_ENUM_GENERIC_MODULES_CALLBACK Callback,
    __in_opt PVOID Context,
    __in PPH_LIST BaseAddressList
    )
{
    PVOID baseAddress;
    MEMORY_BASIC_INFORMATION basicInfo;

    baseAddress = (PVOID)0;

    while (NT_SUCCESS(NtQueryVirtualMemory(
        ProcessHandle,
        baseAddress,
        MemoryBasicInformation,
        &basicInfo,
        sizeof(MEMORY_BASIC_INFORMATION),
        NULL
        )))
    {
        if (basicInfo.Type == MEM_MAPPED)
        {
            PPH_STRING fileName;
            PPH_STRING newFileName;
            PH_MODULE_INFO moduleInfo;
            BOOLEAN cont;

            // Check if we have a duplicate base address.
            if (PhFindItemList(BaseAddressList, baseAddress) != -1)
            {
                goto ContinueLoop;
            }
            else
            {
                PhAddItemList(BaseAddressList, baseAddress);
            }

            if (!NT_SUCCESS(PhGetProcessMappedFileName(
                ProcessHandle,
                baseAddress,
                &fileName
                )))
                goto ContinueLoop;

            // Get the DOS file name and then get the base name.

            newFileName = PhGetFileName(fileName);
            PhDereferenceObject(fileName);

            moduleInfo.Type = PH_MODULE_TYPE_MAPPED_FILE;
            moduleInfo.BaseAddress = baseAddress;
            moduleInfo.Size = (ULONG)basicInfo.RegionSize;
            moduleInfo.EntryPoint = NULL;
            moduleInfo.Flags = 0;
            moduleInfo.FileName = newFileName;
            moduleInfo.Name = PhGetBaseName(newFileName);
            moduleInfo.LoadOrderIndex = -1;
            moduleInfo.LoadCount = -1;

            cont = Callback(&moduleInfo, Context);

            PhDereferenceObject(moduleInfo.FileName);
            PhDereferenceObject(moduleInfo.Name);

            if (!cont)
                break;
        }

ContinueLoop:
        baseAddress = PTR_ADD_OFFSET(baseAddress, basicInfo.RegionSize);
    }
}

/**
 * Enumerates the modules loaded by a process.
 *
 * \param ProcessId The ID of a process. If 
 * \ref SYSTEM_PROCESS_ID is specified the function 
 * enumerates the kernel modules.
 * \param ProcessHandle A handle to the process.
 * \param Flags Flags controlling the information 
 * to retrieve.
 * \li \c PH_ENUM_GENERIC_MAPPED_FILES Enumerate mapped 
 * files.
 * \param Callback A callback function which is executed 
 * for each module.
 * \param Context A user-defined value to pass 
 * to the callback function.
 */
NTSTATUS PhEnumGenericModules(
    __in HANDLE ProcessId,
    __in_opt HANDLE ProcessHandle,
    __in ULONG Flags,
    __in PPH_ENUM_GENERIC_MODULES_CALLBACK Callback,
    __in_opt PVOID Context
    )
{
    NTSTATUS status;
    PPH_LIST baseAddressList;

    baseAddressList = PhCreateList(20);

    if (ProcessId == SYSTEM_PROCESS_ID)
    {
        // Kernel modules

        PVOID modules;

        //if (WindowsVersion >= WINDOWS_VISTA && NT_SUCCESS(status = PhEnumKernelModulesEx((PRTL_PROCESS_MODULE_INFORMATION_EX *)&modules)))
        //{
        //    PhpRtlModulesExToGenericModules(
        //        modules,
        //        Callback,
        //        Context,
        //        baseAddressList
        //        );
        //    PhFree(modules);
        //}
        //else if (NT_SUCCESS(status = PhEnumKernelModules((PRTL_PROCESS_MODULES *)&modules)))
        //{
        //    PhpRtlModulesToGenericModules(
        //        modules,
        //        Callback,
        //        Context,
        //        baseAddressList
        //        );
        //    PhFree(modules);
        //}

        if (NT_SUCCESS(status = PhEnumKernelModules((PRTL_PROCESS_MODULES *)&modules)))
        {
            PhpRtlModulesToGenericModules(
                modules,
                Callback,
                Context,
                baseAddressList
                );
            PhFree(modules);
        }
    }
    else
    {
        // Process modules

        BOOLEAN opened = FALSE;
#ifdef _M_X64
        BOOLEAN isWow64 = FALSE;
#endif
        ENUM_GENERIC_PROCESS_MODULES_CONTEXT context;

        if (!ProcessHandle)
        {
            if (!NT_SUCCESS(status = PhOpenProcess(
                &ProcessHandle,
                PROCESS_QUERY_INFORMATION | PROCESS_VM_READ, // needed for enumerating mapped files
                ProcessId
                )))
            {
                if (!NT_SUCCESS(status = PhOpenProcess(
                    &ProcessHandle,
                    ProcessQueryAccess | PROCESS_VM_READ,
                    ProcessId
                    )))
                {
                    goto CleanupExit;
                }
            }

            opened = TRUE;
        }

        context.Callback = Callback;
        context.Context = Context;
        context.Type = PH_MODULE_TYPE_MODULE;
        context.BaseAddressList = baseAddressList;
        context.LoadOrderIndex = 0;

        status = PhEnumProcessModules(
            ProcessHandle,
            EnumGenericProcessModulesCallback,
            &context
            );

#ifdef _M_X64
        PhGetProcessIsWow64(ProcessHandle, &isWow64);

        // 32-bit process modules
        if (isWow64)
        {
            context.Callback = Callback;
            context.Context = Context;
            context.Type = PH_MODULE_TYPE_WOW64_MODULE;
            context.BaseAddressList = baseAddressList;
            context.LoadOrderIndex = 0;

            status = PhEnumProcessModules32(
                ProcessHandle,
                EnumGenericProcessModulesCallback,
                &context
                );
        }
#endif

        // Mapped files
        // This is done last because it provides the least amount of information.

        if (Flags & PH_ENUM_GENERIC_MAPPED_FILES)
        {
            PhpEnumGenericMappedFiles(
                ProcessHandle,
                Callback,
                Context,
                baseAddressList
                );
        }

        if (opened)
            NtClose(ProcessHandle);
    }

CleanupExit:
    PhDereferenceObject(baseAddressList);

    return status;
}

/**
 * Initializes usage of predefined keys.
 */
VOID PhpInitializePredefineKeys()
{
    static PH_STRINGREF currentUserPrefix = PH_STRINGREF_INIT(L"\\Registry\\User\\");

    NTSTATUS status;
    HANDLE tokenHandle;
    PTOKEN_USER tokenUser;
    UNICODE_STRING stringSid;
    WCHAR stringSidBuffer[MAX_UNICODE_STACK_BUFFER_LENGTH];
    PPH_STRINGREF currentUserKeyName;

    // Get the string SID of the current user.
    if (NT_SUCCESS(status = NtOpenProcessToken(NtCurrentProcess(), TOKEN_QUERY, &tokenHandle)))
    {
        if (NT_SUCCESS(status = PhGetTokenUser(tokenHandle, &tokenUser)))
        {
            stringSid.Buffer = stringSidBuffer;
            stringSid.MaximumLength = sizeof(stringSidBuffer);

            status = RtlConvertSidToUnicodeString(
                &stringSid,
                tokenUser->User.Sid,
                FALSE
                );

            PhFree(tokenUser);
        }

        NtClose(tokenHandle);
    }

    // Construct the current user key name.
    if (NT_SUCCESS(status))
    {
        currentUserKeyName = &PhPredefineKeyNames[PH_KEY_CURRENT_USER_NUMBER];
        currentUserKeyName->Length = currentUserPrefix.Length + stringSid.Length;
        currentUserKeyName->Buffer = PhAllocate(currentUserKeyName->Length + sizeof(WCHAR));
        memcpy(currentUserKeyName->Buffer, currentUserPrefix.Buffer, currentUserPrefix.Length);
        memcpy(&currentUserKeyName->Buffer[currentUserPrefix.Length / sizeof(WCHAR)], stringSid.Buffer, stringSid.Length);
    }
}

/**
 * Initializes the attributes of a key object for creating/opening.
 *
 * \param RootDirectory A handle to a root key, or one of the predefined 
 * keys. See PhCreateKey() for details.
 * \param ObjectName The path to the key.
 * \param Attributes Additional object flags.
 * \param ObjectAttributes The OBJECT_ATTRIBUTES structure to initialize.
 * \param NeedsClose A variable which receives a handle that must be 
 * closed when the create/open operation is finished. The variable may 
 * be set to NULL if no handle needs to be closed.
 */
NTSTATUS PhpInitializeKeyObjectAttributes(
    __in_opt HANDLE RootDirectory,
    __in PPH_STRINGREF ObjectName,
    __in ULONG Attributes,
    __out POBJECT_ATTRIBUTES ObjectAttributes,
    __out PHANDLE NeedsClose
    )
{
    NTSTATUS status;
    ULONG predefineIndex;
    HANDLE predefineHandle;
    OBJECT_ATTRIBUTES predefineObjectAttributes;

    InitializeObjectAttributes(
        ObjectAttributes,
        &ObjectName->us,
        Attributes | OBJ_CASE_INSENSITIVE,
        RootDirectory,
        NULL
        );

    *NeedsClose = NULL;

    if (RootDirectory && PH_KEY_IS_PREDEFINED(RootDirectory))
    {
        predefineIndex = PH_KEY_PREDEFINE_TO_NUMBER(RootDirectory);

        if (predefineIndex < PH_KEY_MAXIMUM_PREDEFINE)
        {
            if (PhBeginInitOnce(&PhPredefineKeyInitOnce))
            {
                PhpInitializePredefineKeys();
                PhEndInitOnce(&PhPredefineKeyInitOnce);
            }

            predefineHandle = PhPredefineKeyHandles[predefineIndex];

            if (!predefineHandle)
            {
                // The predefined key has not been opened yet. Do so now.

                if (!PhPredefineKeyNames[predefineIndex].Buffer) // we may have failed in getting the current user key name
                    return STATUS_UNSUCCESSFUL;

                InitializeObjectAttributes(
                    &predefineObjectAttributes,
                    &PhPredefineKeyNames[predefineIndex].us,
                    OBJ_CASE_INSENSITIVE,
                    NULL,
                    NULL
                    );

                status = NtOpenKey(
                    &predefineHandle,
                    KEY_READ,
                    &predefineObjectAttributes
                    );

                if (!NT_SUCCESS(status))
                    return status;

                if (_InterlockedCompareExchangePointer(
                    &PhPredefineKeyHandles[predefineIndex],
                    predefineHandle,
                    NULL
                    ) != NULL)
                {
                    // Someone else already opened the key and cached it. Indicate that 
                    // the caller needs to close the handle later, since it isn't shared.
                    *NeedsClose = predefineHandle;
                }
            }

            ObjectAttributes->RootDirectory = predefineHandle;
        }
    }

    return STATUS_SUCCESS;
}

/**
 * Creates or opens a registry key.
 *
 * \param KeyHandle A variable which receives a handle to the key.
 * \param DesiredAccess The desired access to the key.
 * \param RootDirectory A handle to a root key, or one of the following predefined 
 * keys:
 * \li \c PH_KEY_LOCAL_MACHINE Represents \\Registry\\Machine.
 * \li \c PH_KEY_USERS Represents \\Registry\\User.
 * \li \c PH_KEY_CLASSES_ROOT Represents \\Registry\\Machine\\Software\\Classes.
 * \li \c PH_KEY_CURRENT_USER Represents \\Registry\\User\\[SID of current user].
 * \param ObjectName The path to the key.
 * \param Attributes Additional object flags.
 * \param CreateOptions The options to apply when creating or opening the key.
 * \param Disposition A variable which receives a value indicating whether a 
 * new key was created or an existing key was opened:
 * \li \c REG_CREATED_NEW_KEY A new key was created.
 * \li \c REG_OPENED_EXISTING_KEY An existing key was opened.
 */
NTSTATUS PhCreateKey(
    __out PHANDLE KeyHandle,
    __in ACCESS_MASK DesiredAccess,
    __in_opt HANDLE RootDirectory,
    __in PPH_STRINGREF ObjectName,
    __in ULONG Attributes,
    __in ULONG CreateOptions,
    __out_opt PULONG Disposition
    )
{
    NTSTATUS status;
    OBJECT_ATTRIBUTES objectAttributes;
    HANDLE needsClose;

    if (!NT_SUCCESS(status = PhpInitializeKeyObjectAttributes(
        RootDirectory,
        ObjectName,
        Attributes,
        &objectAttributes,
        &needsClose
        )))
    {
        return status;
    }

    status = NtCreateKey(
        KeyHandle,
        DesiredAccess,
        &objectAttributes,
        0,
        NULL,
        CreateOptions,
        Disposition
        );

    if (needsClose)
        NtClose(needsClose);

    return status;
}

/**
 * Opens a registry key.
 *
 * \param KeyHandle A variable which receives a handle to the key.
 * \param DesiredAccess The desired access to the key.
 * \param RootDirectory A handle to a root key, or one of the predefined 
 * keys. See PhCreateKey() for details.
 * \param ObjectName The path to the key.
 * \param Attributes Additional object flags.
 */
NTSTATUS PhOpenKey(
    __out PHANDLE KeyHandle,
    __in ACCESS_MASK DesiredAccess,
    __in_opt HANDLE RootDirectory,
    __in PPH_STRINGREF ObjectName,
    __in ULONG Attributes
    )
{
    NTSTATUS status;
    OBJECT_ATTRIBUTES objectAttributes;
    HANDLE needsClose;

    if (!NT_SUCCESS(status = PhpInitializeKeyObjectAttributes(
        RootDirectory,
        ObjectName,
        Attributes,
        &objectAttributes,
        &needsClose
        )))
    {
        return status;
    }

    status = NtOpenKey(
        KeyHandle,
        DesiredAccess,
        &objectAttributes
        );

    if (needsClose)
        NtClose(needsClose);

    return status;
}