/
UYaffi.pas
3470 lines (3119 loc) · 138 KB
/
UYaffi.pas
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{ YAFFI - Yet Another Free Forensic Imager Copyright (C) <2015> <Ted Smith>
A free, cross platform, GUI based imager for acquiring images
in DD raw and EWF format:
https://github.com/tedsmith/yaffi
Provision of the libEWF C library by Joachim Metz is heavily
acknowledged and credited : https://github.com/libyal/libewf
My personal thanks to Joachim for the several e-mails he read
and helpfully replied to!
Contributions from Erwan Labalec for the provision of the
originating Delphi library that contained some of the converted
libEWF functions, a supporting zlib DLL and a compatabile
libewf.dll file (68Kb). These were needed for the opening of
an EWF image file. That is acknowledged: http://labalec.fr/erwan/?p=1235
That same library has then been adjusted and enhanced by Ted Smith :
* Addition of several other functions that are needed for imaging
* Better error reporting added for verbose errors on -1 return values
* Adjusted for use with the Freepascal Compiler and Lazarus IDE
* See unit LibEWFUnit.pas for more details.
This program 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 any later version.
This program 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 this program. If not, see <http://www.gnu.org/licenses/>.
}
unit UYaffi;
{$mode objfpc}{$H+}
interface
uses
{$ifdef UNIX}
process,
{$IFDEF UseCThreads}
cthreads,
{$ENDIF}
{$endif}
{$ifdef Windows}
Process, Windows, ActiveX, ComObj, Variants,
win32proc, GPTMBR, uGPT, // for the OS name detection : http://free-pascal-lazarus.989080.n3.nabble.com/Lazarus-WindowsVersion-td4032307.html
{$endif}
LibEWFUnit, diskspecification, uProgress, Classes, SysUtils, FileUtil,
Forms, Controls, Graphics, LazUTF8, strutils,
Dialogs, StdCtrls, ComCtrls, ExtCtrls, Menus,
textsearch,
{HashLib4Pascal and xxHash64 libraries are both licensed under the MIT License
https://opensource.org/licenses/MIT
HashLib4Pascal : https://github.com/Xor-el/HashLib4Pascal
xxHash64 : https://github.com/Cyan4973/xxHash and http://cyan4973.github.io/xxHash/
}
HlpHashFactory,
HlpIHash,
HlpIHashResult;
type
{ TfrmYaffi }
TfrmYaffi = class(TForm)
btnAbort: TButton;
btnChooseImageName: TButton;
btnStartImaging: TButton;
btnRefreshDiskList: TButton;
btnSearchOptions: TButton;
cbdisks: TComboBox;
cbVerify: TCheckBox;
ComboCompression: TComboBox;
ComboSegmentSize: TComboBox;
ComboImageType: TComboBox;
comboHashChoice: TComboBox;
lblFreeSpaceReceivingDisk: TLabel;
ledtComputedHashA: TLabeledEdit;
ledtComputedHashB: TLabeledEdit;
ledtExaminersName: TLabeledEdit;
ledtCaseName: TLabeledEdit;
GroupBox1: TGroupBox;
ImageList1: TImageList;
Label1: TLabel;
Label2: TLabel;
Label3: TLabel;
Label4: TLabel;
Label5: TLabel;
ledtImageHashA: TLabeledEdit;
ledtImageHashB: TLabeledEdit;
ledtImageName: TLabeledEdit;
ledtExhibitRef: TLabeledEdit;
ledtSelectedItem: TLabeledEdit;
lt: TLabel;
ls: TLabel;
lm: TLabel;
lv: TLabel;
memNotes: TMemo;
memGeneralCaseNotes: TMemo;
menShowDiskManager: TMenuItem;
menShowDiskTechData: TMenuItem;
memImageDisk: TMenuItem;
menHashDisk: TMenuItem;
MenuItem1: TMenuItem;
MenuItem2: TMenuItem;
PopupMenu1: TPopupMenu;
SaveImageDialog: TSaveDialog;
toggleSearchMode: TToggleBox;
TreeView1: TTreeView;
// http://forum.lazarus.freepascal.org/index.php/topic,28560.0.html
procedure btnAbortClick(Sender: TObject);
procedure btnSearchOptionsClick(Sender: TObject);
procedure btnStartImagingClick(Sender: TObject);
procedure btnRefreshDiskListClick(Sender: TObject);
procedure btnChooseImageNameClick(Sender: TObject);
procedure ComboCompressionSelect(Sender: TObject);
procedure ComboImageTypeSelect(Sender: TObject);
procedure ComboSegmentSizeSelect(Sender: TObject);
procedure FormClose(Sender: TObject; var CloseAction: TCloseAction);
procedure FormCreate(Sender: TObject);
procedure ledtCaseNameEnter(Sender: TObject);
procedure ledtExaminersNameEnter(Sender: TObject);
procedure ledtExhibitRefEnter(Sender: TObject);
procedure memGeneralCaseNotesEnter(Sender: TObject);
procedure memNotesEnter(Sender: TObject);
procedure menHashDiskClick(Sender: TObject);
procedure menShowDiskManagerClick(Sender: TObject);
procedure MenuItem2Click(Sender: TObject);
procedure TreeView1SelectionChanged(Sender: TObject);
function InitialiseHashChoice(Sender : TObject) : Integer;
function InitialiseImageType(Sender : TObject) : Integer;
function InitialiseSegmentSize(Sender : TObject) : Int64;
function InitialiseCompressionChoice(Sender : TObject) : Integer;
procedure cbdisksChange(Sender: TObject);
function GetDiskTechnicalSpecs(Sender: TObject) : Integer;
function GetDiskTechnicalSpecsLinux(Sender: TObject) : Integer;
function GetFriendlyDiskDriveName (str : string) : string;
procedure memWipeDiskClick(Sender: TObject);
private
{ private declarations }
public
Stop : boolean;
BytesPerSector : integer;
{ public declarations }
end;
var
frmYaffi: TfrmYaffi;
PhyDiskNode, PartitionNoNode, DriveLetterNode : TTreeNode;
HashChoice : integer;
slOffsetsOfHits : TStringList;
{$ifdef Windows}
// These four functions are needed for traversing the attached disks in Windows.
// Yes, all these for just that!! The joy of Windows coding
// Credit to RRUZ at SO : https://stackoverflow.com/questions/12271269/how-can-i-correlate-logical-drives-and-physical-disks-using-the-wmi-and-delphi/12271778#comment49108167_12271778
// https://theroadtodelphi.wordpress.com/2010/12/01/accesing-the-wmi-from-pascal-code-delphi-oxygene-freepascal/#Lazarus
function ListDrives : string;
function VarStrNull(const V:OleVariant):string;
function GetWMIObject(const objectName: String): IDispatch;
function VarArrayToStr(const vArray: variant): string;
// Formatting functions
function GetDiskLengthInBytes(hSelectedDisk : THandle) : Int64;
function GetSectorSizeInBytes(hSelectedDisk : THandle) : Int64;
function GetJustDriveLetter(str : widestring) : string;
function GetDriveIDFromLetter(str : string) : Byte;
function GetVolumeName(DriveLetter: Char): string;
function GetOSName() : string;
{$endif}
{$ifdef Unix}
function ListDrivesLinux : string;
function GetOSNameLinux() : string;
function GetBlockCountLinux(s : string) : string;
function GetBlockSizeLinux(DiskDevName : string) : Integer;
function GetDiskLabels(DiskDevName : string) : string;
function GetByteCountLinux(DiskDevName : string) : QWord;
{$endif}
function ImageDiskDD(hDiskHandle : THandle; DiskSize : Int64; HashChoice : Integer; fsImageName : TFileStream) : Int64;
function VerifyDDImage(fsImageName : TFileStream; ImageFileSize : Int64) : string;
function ImageDiskE01(hDiskHandle : THandle; SegmentSize : Int64; DiskSize : Int64; HashChoice : Integer) : Int64;
function VerifyE01Image(strImageName : widestring) : string;
function HashDisk(hDiskHandle : THandle; DiskSize : Int64; HashChoice : Integer) : Int64;
function FormatByteSize(const bytes: QWord): string;
function ExtractNumbers(s: string): string;
function DoCaseSensitiveTextSearchOfBuffer (Buffer : array of byte; TotalBytesRead : Int64; BytesRead : Integer) : Integer;
function DoCaseINSensitiveTextSearchOfBuffer(Buffer : array of byte; TotalBytesRead : Int64; BytesRead : Integer) : Integer;
function DoHEXSearchOfBuffer (Buffer : array of byte; TotalBytesRead : Int64; BytesRead : Integer) : Integer;
implementation
{$R *.lfm}
{ TfrmYaffi }
// Enable or disable elements depending on the OS hosting the application
procedure TfrmYaffi.FormCreate(Sender: TObject);
var
MissingFileCount : integer;
begin
Stop := false;
MissingFileCount := 0;
ledtComputedHashA.Enabled := false;
ledtComputedHashB.Enabled := false;
slOffsetsOfHits := TStringList.Create;
{$ifdef Windows}
// These are the Linux centric elements, so disable them on Windows
cbdisks.Enabled := false;
cbdisks.Visible := false;
Label1.Enabled := false;
Label1.Visible := false;
Label2.Enabled := false;
Label2.Visible := false;
Label3.Enabled := false;
Label3.Visible := false;
Label4.Enabled := false;
Label4.Visible := false;
Label5.Enabled := false;
Label5.Visible := false;
lv.Enabled := false;
lv.Visible := false;
lm.Enabled := false;
lm.Visible := false;
ls.Enabled := false;
ls.Visible := false;
lt.Enabled := false;
lt.Visible := false;
if FileExists('libewf.dll') = false
then
begin
Showmessage('Libewf.dll not found. Only DD imaging will work.');
inc(MissingFileCount, 1);
end;
if FileExists('zlib.dll') = false
then
begin
Showmessage('Zlib.dll not found. Any E01 image compression will fail');
inc(MissingFileCount, 1);
end;
if FileExists('msvcr100.dll') = false
then
begin
Showmessage('msvcr100.dll not found. May only cause a problem if using Windows XP or earlier');
inc(MissingFileCount, 1);
end;
{$endif Windows}
{$ifdef UNIX}
if FileExists('libewf.so') = false
then
begin
Showmessage('Libewf.so not found. Only DD imaging will work.');
inc(MissingFileCount, 1);
end;
if FileExists('libz.so') = false
then
begin
Showmessage('libz.so (Linux zlip library) not found. Any E01 image compression will fail');
inc(MissingFileCount, 1);
end;
{$endif}
if MissingFileCount = 3 then
Showmessage('You are missing three important DLL files.' + #13#10 +
'Considering they came zipped with YAFFI, this is perplexing.' + #13#10 +
'Whilst continuing is indeed possible, expect problems!');
GroupBox1.Enabled := true;
GroupBox1.Visible := true;
end;
procedure TfrmYaffi.ledtCaseNameEnter(Sender: TObject);
begin
ledtCaseName.Clear;
end;
procedure TfrmYaffi.ledtExaminersNameEnter(Sender: TObject);
begin
ledtExaminersName.Clear;
end;
procedure TfrmYaffi.ledtExhibitRefEnter(Sender: TObject);
begin
ledtExhibitRef.Clear;
end;
procedure TfrmYaffi.memGeneralCaseNotesEnter(Sender: TObject);
begin
memGeneralCaseNotes.Clear;
end;
procedure TfrmYaffi.memNotesEnter(Sender: TObject);
begin
memNotes.Clear;
end;
procedure TfrmYaffi.btnRefreshDiskListClick(Sender: TObject);
begin
{$ifdef Windows}
try
TreeView1.Items.Clear;
ListDrives;
finally
end;
{$endif}
{$ifdef UNIX}
try
Treeview1.Items.Clear;
ListDrivesLinux;
finally
end;
{$endif}
end;
procedure TfrmYaffi.btnAbortClick(Sender: TObject);
begin
Stop := TRUE;
if Stop = TRUE then
begin
ledtComputedHashA.Text := 'Process aborted.';
ledtComputedHashB.Text := 'Process aborted.';
ledtImageHashA.Text := 'Process aborted.';
ledtImageHashB.Text := 'Process aborted.';
Abort;
end;
end;
procedure TfrmYaffi.btnSearchOptionsClick(Sender: TObject);
begin
frmTextSearch.Show;
end;
procedure TfrmYaffi.ComboImageTypeSelect(Sender: TObject);
begin
if frmYaffi.InitialiseImageType(nil) = 1 then
begin
ledtImageName.Text := ChangeFileExt(ledtImageName.Text, '.E01');
ComboCompression.Enabled := true;
ComboSegmentSize.Enabled := true;
end;
if frmYaffi.InitialiseImageType(nil) = 2 then
begin
ledtImageName.Text := ChangeFileExt(ledtImageName.Text, '.dd');
ComboCompression.Enabled := false;
ComboSegmentSize.Enabled := false;
end;
end;
procedure TfrmYaffi.ComboSegmentSizeSelect(Sender: TObject);
begin
frmYaffi.InitialiseSegmentSize(nil);
end;
procedure TfrmYaffi.FormClose(Sender: TObject; var CloseAction: TCloseAction);
begin
if assigned(slSearchList) then slSearchList.Free;
if assigned(slOffsetsOfHits) then slOffsetsOfHits.Free;
end;
procedure TfrmYaffi.ComboCompressionSelect(Sender: TObject);
begin
frmYaffi.InitialiseCompressionChoice(nil);
end;
// For now, returns -1 if no hits found. 1 otherwise.
function DoCaseSensitiveTextSearchOfBuffer(Buffer : array of byte; TotalBytesRead : Int64; BytesRead : Integer) : Integer;
var
TextData : ansistring;
i, Counter, PositionFoundInBuffer : integer;
PositionFoundOnDisk : Int64;
begin
i := 0;
Counter := 0;
PositionFoundInBuffer := 0;
PositionFoundOnDisk := 0;
// Convert the binary byte array to an array of chars for searching in
TextData := textsearch.ByteArrayToString(Buffer);
// Now search the array of chars case sensitively
for i := 0 to slSearchList.Count -1 do
begin
if Pos(Trim(slSearchList.Strings[i]), TextData) > 0 then
begin
PositionFoundInBuffer := Pos(slSearchList.Strings[i], TextData);
PositionFoundOnDisk := (TotalBytesRead - BytesRead) + (PositionFoundInBuffer -1);
slOffsetsOfHits.Add(slSearchList.Strings[i] + ' at offset ' + IntToStr(PositionFoundOnDisk));
Counter := 1;
// Check the buffer again, from the point the first hit was found, for any more hits
if PosEx(slSearchList.Strings[i], TextData, (PositionFoundInBuffer + Length(slSearchList.Strings[i]))) > 0 then
repeat
PositionFoundInBuffer := PosEx(slSearchList.Strings[i], TextData, (PositionFoundInBuffer + Length(slSearchList.Strings[i])));
PositionFoundOnDisk := (TotalBytesRead - BytesRead) + (PositionFoundInBuffer -1);
inc(PositionFoundInBuffer, 1);
inc(Counter, 1);
slOffsetsOfHits.Add(slSearchList.Strings[i] + ' at offset ' + IntToStr(PositionFoundOnDisk));
until PosEx(slSearchList.Strings[i], TextData, PositionFoundInBuffer) = 0;
Result := Counter;
end
else Result := -1;
end;
end;
// For now, returns -1 if no hits found. 1 otherwise.
function DoCaseINSensitiveTextSearchOfBuffer(Buffer : array of byte; TotalBytesRead : Int64; BytesRead : Integer) : Integer;
var
TextData : ansistring;
i, Counter, PositionFoundInBuffer : integer;
PositionFoundOnDisk : Int64;
begin
i := 0;
TextData := '';
PositionFoundInBuffer := 0;
PositionFoundOnDisk := 0;
Counter := 0;
// Convert the binary byte array to an array of chars for searching in
TextData := textsearch.ByteArrayToString(Buffer);
// Now search the array of chars case INsensitively
for i := 0 to slSearchList.Count -1 do
begin
if textsearch.PosCaseInsensitive(Trim(slSearchList.Strings[i]), TextData) > 0 then
begin
PositionFoundInBuffer := PosCaseInsensitive(slSearchList.Strings[i], TextData);
PositionFoundOnDisk := (TotalBytesRead - BytesRead) + (PositionFoundInBuffer -1);
slOffsetsOfHits.Add(slSearchList.Strings[i] + ' at offset ' + IntToStr(PositionFoundOnDisk));
Counter := 1;
// Check the buffer again, from the point the first hit was found, for any more hits
if textsearch.InsensPosEx(slSearchList.Strings[i], TextData, (PositionFoundInBuffer + Length(slSearchList.Strings[i]))) > 0 then
repeat
PositionFoundInBuffer := textsearch.InsensPosEx(slSearchList.Strings[i], TextData, (PositionFoundInBuffer + Length(slSearchList.Strings[i])));
PositionFoundOnDisk := (TotalBytesRead - BytesRead) + (PositionFoundInBuffer -1);
inc(PositionFoundInBuffer, 1);
inc(Counter, 1);
slOffsetsOfHits.Add(slSearchList.Strings[i] + ' at offset ' + IntToStr(PositionFoundOnDisk));
until textsearch.InsensPosEx(slSearchList.Strings[i], TextData, PositionFoundInBuffer) = 0;
Result := Counter;
end
else Result := -1;
end;
end;
// For now, returns -1 if no hex entries are found. 1 otherwise.
function DoHEXSearchOfBuffer(Buffer : array of byte; TotalBytesRead : Int64; BytesRead : Integer) : Integer;
var
strHexVal : ansistring;
i, Counter, PosInBufferOfHexValue : integer;
intHexValAsDec : QWORD;
PositionFoundOnDisk : Int64;
begin
Result := -1;
PositionFoundOnDisk := 0;
intHexValAsDec := 0;
Counter := 0;
// Loop through the users list of hex entries and search the buffer for each one
for i := 0 to slSearchList.Count -1 do
begin
// Format the hex strings in the user list (remove spaces, add a $ before it etc)
strHexVal := DelSpace(slSearchList[i]);
intHexValAsDec := textsearch.Hex2DecBig(strHexVal);
// Search for the integer representation using bespoke, fast, IndexOfDWord function
PosInBufferOfHexValue := textsearch.IndexOfDWord(@Buffer[0], Length(Buffer), SwapEndian(intHexValAsDec)); //SwapEndian($4003E369)); //StrToInt('$' + Memo1.Lines[i]));
// If it was found, detail the find
if PosInBufferOfHexValue > -1 then
begin
PositionFoundOnDisk := (TotalBytesRead - BytesRead) + PosInBufferOfHexValue;
slOffsetsOfHits.Add(slSearchList.Strings[i] + ' at offset ' + IntToStr(PositionFoundOnDisk));
inc(Counter, 1);
Result := Counter;
end;
end;
end;
// Gets variosu disk properties like model, manufacturer etc, for Linux usage
// Returns a concatanated string for display in the Treeview
function GetDiskLabels(DiskDevName : string) : string;
const
smodel = 'ID_MODEL=';
sserial = 'ID_SERIAL_SHORT=';
stype = 'ID_TYPE=';
svendor = 'ID_VENDOR=';
var
DiskInfoProcess : TProcess;
DiskInfoProcessUDISKS : TProcess;
diskinfo, diskinfoUDISKS : TStringList;
i : Integer;
stmp, strModel, strVendor, strType, strSerial : String;
begin
// Probe all attached disks and populate the interface
DiskInfoProcess:=TProcess.Create(nil);
DiskInfoProcess.Options:=[poWaitOnExit, poUsePipes];
DiskInfoProcess.CommandLine:='/sbin/udevadm info --query=property --name='+DiskDevName; //get info about selected disk
DiskInfoProcess.Execute;
diskinfo:=TStringList.Create;
diskinfo.LoadFromStream(DiskInfoProcess.Output);
for i:=0 to diskinfo.Count-1 do
begin
if pos(smodel, diskinfo.Strings[i])>0 then
begin
stmp:=diskinfo.Strings[i];
Delete(stmp, 1, Length(smodel));
if pos('_', stmp)>0 then
begin
strModel:=Copy(stmp, 1, pos('_', stmp)-1);
Delete(stmp, 1, pos('_', stmp));
strModel :=stmp;
if Length(strModel) = 0 then strModel := 'No Value';
end
else
strModel:=stmp;
end
else if pos(sserial, diskinfo.Strings[i])>0 then
begin
strSerial := Copy(diskinfo.Strings[i], Length(sserial)+1, Length(diskinfo.Strings[i])-Length(sserial));
if Length(strSerial) = 0 then strSerial := 'No Value';
end
else if pos(stype, diskinfo.Strings[i])>0 then
begin
strType := Copy(diskinfo.Strings[i], Length(stype)+1, Length(diskinfo.Strings[i])-Length(stype));
if Length(strType) = 0 then strType := 'No Value';
end
else if pos(svendor, diskinfo.Strings[i])>0 then
begin
strVendor := Copy(diskinfo.Strings[i], Length(svendor)+1, Length(diskinfo.Strings[i])-Length(svendor));
if Length(strVendor) = 0 then strVendor := 'No Value';
end;
end;
result := '(Model: ' + strModel + ', Serial No: ' + strSerial + ', Type: ' + strType + ', Vendor: ' + strVendor + ')';
end;
// Delete this eventually, once youre sure the Combo box is redundant
procedure TfrmYaffi.cbdisksChange(Sender: TObject);
const
smodel = 'ID_MODEL=';
sserial = 'ID_SERIAL_SHORT=';
stype = 'ID_TYPE=';
svendor = 'ID_VENDOR=';
var
DiskInfoProcess : TProcess;
DiskInfoProcessUDISKS : TProcess;
diskinfo, diskinfoUDISKS : TStringList;
i : Integer;
stmp : String;
begin
if cbdisks.ItemIndex<0 then
exit;
lv.Caption:='';
lm.Caption:='';
ls.Caption:='';
lt.Caption:='';
// Probe all attached disks and populate the interface
DiskInfoProcess:=TProcess.Create(nil);
DiskInfoProcess.Options:=[poWaitOnExit, poUsePipes];
DiskInfoProcess.CommandLine:='/sbin/udevadm info --query=property --name='+cbdisks.Text; //get info about selected disk
DiskInfoProcess.Execute;
diskinfo:=TStringList.Create;
diskinfo.LoadFromStream(DiskInfoProcess.Output);
for i:=0 to diskinfo.Count-1 do
begin
if pos(smodel, diskinfo.Strings[i])>0 then
begin
stmp:=diskinfo.Strings[i];
Delete(stmp, 1, Length(smodel));
if pos('_', stmp)>0 then
begin
lv.Caption:=Copy(stmp, 1, pos('_', stmp)-1);
Delete(stmp, 1, pos('_', stmp));
lm.Caption:=stmp;
end
else
lm.Caption:=stmp;
end
else if pos(sserial, diskinfo.Strings[i])>0 then
ls.Caption:=Copy(diskinfo.Strings[i], Length(sserial)+1, Length(diskinfo.Strings[i])-Length(sserial))
else if pos(stype, diskinfo.Strings[i])>0 then
lt.Caption:=Copy(diskinfo.Strings[i], Length(stype)+1, Length(diskinfo.Strings[i])-Length(stype))
else if pos(svendor, diskinfo.Strings[i])>0 then
begin
lm.Caption:=lv.Caption+' '+lm.Caption;
lv.Caption:=Copy(diskinfo.Strings[i], Length(svendor)+1, Length(diskinfo.Strings[i])-Length(svendor));
end;
end;
// Get all technical specifications about a user selected disk and save it
DiskInfoProcessUDISKS := TProcess.Create(nil);
DiskInfoProcessUDISKS.Options := [poWaitOnExit, poUsePipes];
DiskInfoProcessUDISKS.CommandLine := 'udisks --show-info /dev/' + cbdisks.Text;
DiskInfoProcessUDISKS.Execute;
diskinfoUDISKS := TStringList.Create;
diskinfoUDISKS.LoadFromStream(diskinfoProcessUDISKS.Output);
diskinfoUDISKS.SaveToFile('TechnicalDiskDetails.txt');
// Free everything
diskinfo.Free;
diskinfoUDISKS.Free;
DiskInfoProcess.Free;
DiskInfoProcessUDISKS.Free;
end;
{$ifdef UNIX}
function ListDrivesLinux : string;
var
DisksProcess: TProcess;
i: Integer;
slDisklist: TSTringList;
PhyDiskNode, PartitionNoNode, DriveLetterNode : TTreeNode;
strPhysDiskSize, strLogDiskSize, DiskDevName, DiskLabels, dmCryptDiscovered : string;
begin
DisksProcess:=TProcess.Create(nil);
DisksProcess.Options:=[poWaitOnExit, poUsePipes];
DisksProcess.CommandLine:='cat /proc/partitions'; //get all disks/partitions list
DisksProcess.Execute;
slDisklist:=TStringList.Create;
slDisklist.LoadFromStream(DisksProcess.Output);
slDisklist.Delete(0); //delete columns name line
slDisklist.Delete(0); //delete separator line
//cbdisks.Items.Clear;
frmYAFFI.Treeview1.Images := frmYAFFI.ImageList1;
PhyDiskNode := frmYAFFI.TreeView1.Items.Add(nil,'Physical Disk') ;
PhyDiskNode.ImageIndex := 0;
DriveLetterNode := frmYAFFI.TreeView1.Items.Add(nil,'Logical Volume') ;
DriveLetterNode.ImageIndex := 1;
// List physical disks, e.g. sda, sdb, hda, hdb etc
for i:=0 to slDisklist.Count-1 do
begin
if Length(Copy(slDisklist.Strings[i], 26, Length(slDisklist.Strings[i])-25))=3 then
begin
DiskDevName := '/dev/' + Trim(RightStr(slDisklist.Strings[i], 3));
DiskLabels := GetDiskLabels(DiskDevName);
strPhysDiskSize := FormatByteSize(GetByteCountLinux(DiskDevName));
frmYaffi.TreeView1.Items.AddChild(PhyDiskNode, DiskDevName + ' | ' + strPhysDiskSize + ' ' + DiskLabels);
end;
//cbdisks.Items.Add(Copy(slDisklist.Strings[i], 26, Length(slDisklist.Strings[i])-25));
end;
// List Logical drives (partitions), e.g. sda1, sdb2, hda1, hdb2 etc
for i:=0 to slDisklist.Count-1 do
begin
dmCryptDiscovered := '';
if Length(Copy(slDisklist.Strings[i], 26, Length(slDisklist.Strings[i])-25))=4 then
begin
DiskDevName := '/dev/' + Trim(RightStr(slDisklist.Strings[i], 4));
DiskLabels := GetDiskLabels(DiskDevName);
if Pos('/dm', DiskDevName) > 0 then
begin
dmCryptDiscovered := '*** mounted dmCrypt drive! ***';
end;
strLogDiskSize := FormatByteSize(GetByteCountLinux(DiskDevName));
frmYaffi.TreeView1.Items.AddChild(DriveLetterNode, DiskDevName + ' | ' + strLogDiskSize + ' ' + dmCryptDiscovered +' ' + DiskLabels);
end;
end;
frmYaffi.Treeview1.AlphaSort;
slDisklist.Free;
DisksProcess.Free;
end;
{$endif}
// Returns a string holding the disk block COUNT (not size) as extracted from the string from
// /proc/partitions. e.g. : 8 0 312571224 sda
function GetBlockCountLinux(s : string) : string;
var
strBlockCount : string;
StartPos, EndPos : integer;
begin
strBlockCount := '';
StartPos := 0;
EndPos := 0;
EndPos := RPos(Chr($20), s);
StartPos := RPosEx(Chr($20), s, EndPos-1);
strBlockCount := Copy(s, StartPos, EndPos-StartPos);
result := strBlockCount;
end;
function GetBlockSizeLinux(DiskDevName : string) : Integer;
var
DiskProcess: TProcess;
BlockSize, StartOffset, i : Integer;
slDevDisk: TSTringList;
strBlockSize : string;
RelLine : boolean;
begin
RelLine := false;
BlockSize := 0;
DiskProcess:=TProcess.Create(nil);
DiskProcess.Options:=[poWaitOnExit, poUsePipes];
DiskProcess.CommandLine:='udisks --show-info ' + DiskDevName; //get all disks/partitions list
DiskProcess.Execute;
slDevDisk := TStringList.Create;
slDevDisk.LoadFromStream(DiskProcess.Output);
for i := 0 to slDevDisk.Count -1 do
begin
if pos('block size:', slDevDisk.Strings[i]) > 0 then
begin
strBlockSize := RightStr(slDevDisk.Strings[i], 4);
if Length(strBlockSize) > 0 then result := StrToInt(strBlockSize);
end;
end;
end;
// Extracts the byte value "Size: " from the output of udisks --show-info /dev/sdX
//
function GetByteCountLinux(DiskDevName : string) : QWord;
var
DiskProcess: TProcess;
StartOffset, i : Integer;
slDevDisk: TSTringList;
strByteCount : string;
ScanDiskData : boolean;
intByteCount : QWord;
begin
ScanDiskData := false;
result := 0;
intByteCount := 0;
strByteCount := '';
DiskProcess:=TProcess.Create(nil);
DiskProcess.Options:=[poWaitOnExit, poUsePipes];
DiskProcess.CommandLine:='udisks --show-info ' + DiskDevName; //get all disks/partitions list
DiskProcess.Execute;
slDevDisk := TStringList.Create;
slDevDisk.LoadFromStream(DiskProcess.Output);
for i := 0 to slDevDisk.Count -1 do
begin
// Search for 'Size:' in the output, but note there are two values.
// This function only wants the first value, so abort once it's found
if (pos('size:', slDevDisk.Strings[i]) > 0) and (ScanDiskData = false) then
begin
ScanDiskData := true;
strByteCount := ExtractNumbers(slDevDisk.Strings[i]);
if Length(strByteCount) > 0 then
begin
intByteCount := StrToQWord(strByteCount);
result := intByteCount;
end;
end;
end;
slDevDisk.free;
end;
procedure TfrmYaffi.btnStartImagingClick(Sender: TObject);
const
// These values are needed for For FSCTL_ALLOW_EXTENDED_DASD_IO to work properly
// on logical volumes. They are sourced from
// https://github.com/magicmonty/delphi-code-coverage/blob/master/3rdParty/JCL/jcl-2.3.1.4197/source/windows/JclWin32.pas
FILE_DEVICE_FILE_SYSTEM = $00000009;
FILE_ANY_ACCESS = 0;
METHOD_NEITHER = 3;
FSCTL_ALLOW_EXTENDED_DASD_IO = ((FILE_DEVICE_FILE_SYSTEM shl 16)
or (FILE_ANY_ACCESS shl 14)
or (32 shl 2) or METHOD_NEITHER);
var
SourceDevice, strImageName : widestring;
hSelectedDisk : THandle;
ExactDiskSize, SectorCount, ImageResult,
SegmentSize, ImageFileSize : Int64;
ImageTypeChoice, ExactSectorSize : integer;
slImagingLog : TStringList;
BytesReturned : DWORD;
VerificationHash : string;
ImageVerified : boolean;
StartedAt, EndedAt,
VerificationStartedAt, VerificationEndedAt,
TimeTakenToImage, TimeTakenToVerify : TDateTime;
fsImageName : TFileStream;
begin
BytesReturned := 0;
ExactDiskSize := 0;
ExactSectorSize := 0;
SectorCount := 0;
ImageResult := 0;
ImageFileSize := 0;
HashChoice := -1;
ImageTypeChoice := -1;
SegmentSize := 0;
SegmentSize := InitialiseSegmentSize(nil);
StartedAt := 0;
EndedAt := 0;
TimeTakenToImage:= 0;
VerificationStartedAt := 0;
VerificationEndedAt := 0;
TimeTakenToVerify := 0;
SourceDevice := ledtSelectedItem.Text;
strImageName := ledtImageName.Text;
ImageVerified := false;
ComboImageType.Enabled := false;
comboHashChoice.Enabled := false;
ComboSegmentSize.Enabled := false;
frmProgress.lblResult.Caption := 'Awaiting result...';
frmProgress.btnCloseProgressWindow.Enabled := false;
// Determine what hash algorithm to use. MD5 = 1, SHA-1 = 2, MD5 & SHA-1 = 3, Use Non = 4. -1 is false
HashChoice := frmYaffi.InitialiseHashChoice(nil);
if HashChoice = -1 then abort;
// Deterime whether to image as DD or E01
ImageTypeChoice := frmYaffi.InitialiseImageType(nil);
if ImageTypeChoice = -1 then abort;
// Avoid overwriting an existing image if the user just presses start again
// after already running an image
// TODO : For some weird reason, this returns true for DD images even though the file
// doesnt exist yet? But for the E01 images, it works as expected
{
if FileExists(strImageName) then
begin
ShowMessage(strImageName + ' already exists. Delete it first.');
ComboImageType.Enabled := true;
comboHashChoice.Enabled := true;
ComboSegmentSize.Enabled := true;
ComboCompression.Enabled := true;
Abort;
end;
}
// Create handle to source disk. Abort if fails
{$ifdef Windows}
hSelectedDisk := CreateFileW(PWideChar(SourceDevice),
FILE_READ_DATA,
FILE_SHARE_READ AND FILE_SHARE_WRITE,
nil,
OPEN_EXISTING,
FILE_FLAG_SEQUENTIAL_SCAN,
0);
// Check if handle is valid before doing anything else
if hSelectedDisk = INVALID_HANDLE_VALUE then
begin
RaiseLastOSError;
end
{$else ifdef UNIX}
hSelectedDisk := FileOpen(SourceDevice, fmOpenRead);
// Check if handle is valid before doing anything else
if hSelectedDisk = -1 then
begin
RaiseLastOSError;
end
{$endif}
else
begin
// If chosen device is logical volume, initiate FSCTL_ALLOW_EXTENDED_DASD_IO
// to ensure all sectors acquired, even those protected by the OS normally.
// https://msdn.microsoft.com/en-us/library/windows/desktop/aa363147%28v=vs.85%29.aspx
// https://msdn.microsoft.com/en-us/library/windows/desktop/aa364556%28v=vs.85%29.aspx
{$ifdef Windows}
if Pos('?', SourceDevice) > 0 then
begin
if not DeviceIOControl(hSelectedDisk, FSCTL_ALLOW_EXTENDED_DASD_IO, nil, 0,
nil, 0, BytesReturned, nil) then
raise Exception.Create('Unable to initiate FSCTL_ALLOW_EXTENDED_DASD_IO.');
end;
{$endif}
// Source disk handle is OK. So attempt imaging of it
// First, compute the exact disk size of the disk or volume
{$ifdef Windows}
ExactDiskSize := GetDiskLengthInBytes(hSelectedDisk);
{$endif}
{$ifdef UNIX}
ExactDiskSize := GetByteCountLinux(SourceDevice);
{$endif}
// Now query the sector size.
// 512 bytes is common with MBR but with GPT disks, 1024 or 4096 is likely
{$ifdef Windows}
ExactSectorSize := GetSectorSizeInBytes(hSelectedDisk);
{$endif}
{$ifdef Unix}
ExactSectorSize := GetBlockSizeLinux(SourceDevice);
{$endif}
// Now we can assign a sector count based on sector size and disk size
SectorCount := ExactDiskSize DIV ExactSectorSize;
frmProgress.lblTotalBytesSource.Caption := ' bytes captured of ' + IntToStr(ExactDiskSize);
// Now image the chosen device, passing the exact size and
// hash selection and Image name.
// If InitialiseImageType returns 1, we use E01 and libEWF C library. Otherwise, DD.
// E01 IMAGE
if InitialiseImageType(nil) = 1 then
begin
StartedAt := Now;
// libEWF takes care of assigning handles to image etc
ImageResult := ImageDiskE01(hSelectedDisk, SegmentSize, ExactDiskSize, HashChoice);
If ImageResult = ExactDiskSize then
begin
frmProgress.lblStatus.Caption := 'Imaged OK. ' + IntToStr(ExactDiskSize)+' bytes captured.';
EndedAt := Now;
TimeTakenToImage := EndedAt - StartedAt;
// Verify the E01 image, if desired by the user
if (cbVerify.Checked) and (ImageResult > -1) then
begin
VerificationStartedAt := Now;
VerificationHash := VerifyE01Image(strImageName);
if (Length(VerificationHash) = 32) or // MD5
(Length(VerificationHash) = 40) or // SHA-1
(Length(VerificationHash) = 73) then // Both hashes with a space char
begin
ImageVerified := true;
VerificationEndedAt := Now;
TimeTakenToVerify := VerificationEndedAt - VerificationStartedAt;
frmProgress.lblStatus.Caption := 'Image re-read OK. Verifies. See log file';
frmProgress.lblResult.Caption := 'Imaged and verified OK. Total time: ' + FormatDateTime('HHH:MM:SS', (TimeTakenToImage + TimeTakenToVerify));
end;
end;
end
else
begin
ShowMessage('Imaging failed\aborted. ' + IntToStr(ImageResult) + ' bytes captured of the reported ' + IntToStr(ExactDiskSize));
end;
end
// DD IMAGE
else if InitialiseImageType(nil) = 2 then
begin
StartedAt := Now;
// Create a filestream for the output image file
fsImageName := TFileStream.Create(Trim(ledtImageName.Text), fmCreate);
// Image hSelectedDisk to fsImageName, returning the number of bytes read
ImageResult := ImageDiskDD(hSelectedDisk, ExactDiskSize, HashChoice, fsImageName);
If ImageResult = ExactDiskSize then
begin
frmProgress.lblResult.Caption := 'Imaged OK. ' + IntToStr(ExactDiskSize)+' bytes captured.';
EndedAt := Now;
TimeTakenToImage := EndedAt - StartedAt;
Application.ProcessMessages;
// Verify the DD image, if desired by the user
if (cbVerify.Checked) and (ImageResult > -1) then
begin
ImageFileSize := fsImageName.Size;
VerificationStartedAt := Now;
VerificationHash := VerifyDDImage(fsImageName, fsImageName.Size);
if (Length(VerificationHash) = 32) or // MD5
(Length(VerificationHash) = 40) or // SHA-1
(Length(VerificationHash) = 73) then // Both hashes with a space char
begin
ImageVerified := true;
VerificationEndedAt := Now;