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repack.au3
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repack.au3
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#NoTrayIcon
#Region ;**** Directives created by AutoIt3Wrapper_GUI ****
#AutoIt3Wrapper_UseX64=y
#AutoIt3Wrapper_Change2CUI=y
#EndRegion ;**** Directives created by AutoIt3Wrapper_GUI ****
#include <FileConstants.au3>
#include <String.au3>
#include <Array.au3>
#include <File.au3>
#include "inc\Binary.au3"
#include "inc\Common.au3"
Global Const $iChunkPadding = 4096
Global Const $iMultiSizePerVol = 157286400 ; how many bytes each "volume" (in multi-volume LZO chunks) should be
Global Const $sLzoCompression = "-5" ; -1 is faster, -9 is better
If Not FileExists(@ScriptDir & "\unpacked") Then
ConsoleWrite("[!] Folder 'unpacked' does not exist. Unpack something first." & @CRLF)
Exit
EndIf
If FileExists(@ScriptDir & "\MstarUpgrade.bin.out") Then
ConsoleWrite("[!] A file named 'MstarUpgrade.bin.out' already exists. Remove or rename it first." & @CRLF)
Exit
EndIf
Global $sOutput = @ScriptDir & "\MstarUpgrade.bin.out"
Global $sOutputTmpHeader = $sOutput & ".tmp.1"
Global $sOutputTmpChunks = $sOutput & ".tmp.2"
Global $hOutput = FileOpen($sOutput, $FO_APPEND + $FO_BINARY)
Global $hOutputTmpHeader = FileOpen($sOutputTmpHeader, $FO_APPEND + $FO_BINARY)
Global $hOutputTmpChunks = FileOpen($sOutputTmpChunks, $FO_APPEND + $FO_BINARY)
Global $iCRC32_script
Global $aHeaderScript
checkFiles()
readHeader()
writeChunks()
writeHeader()
joinHeaderAndChunks()
writeFooter()
cleanup()
Func checkFiles()
$bOk = True
If $hOutput = -1 Then $bOk = False
If $hOutputTmpHeader = -1 Then $bOk = False
If $hOutputTmpChunks = -1 Then $bOk = False
If Not $bOk Then
ConsoleWrite("[!] Unable to get write permissions in current folder. Running as admin?")
Exit
EndIf
EndFunc
Func readHeader()
$aHeaderScript = FileReadToArray(@ScriptDir & "\unpacked\~bundle_script")
;_ArrayDisplay($aHeaderScript)
EndFunc
Func writeChunks()
$iTotalChunks = (IniReadSectionNames(@ScriptDir & "\unpacked\~bundle_info.ini"))[0] - 1 ; element 0 is the number of elements and [common] section is of no significance
$sIntermediateMultiIndex = "a"
For $i = 1 To $iTotalChunks
; get INI info for this chunk
$aChunkInfo = IniReadSection(@ScriptDir & "\unpacked\~bundle_info.ini", "chunk" & $i)
If @error Then
ConsoleWrite(" [!] WARNING! Chunk info missing, skipping. Ensure this chunk is removed" & @CRLF)
ConsoleWrite(" from the header script - otherwise flashing the device will fail!" & @CRLF)
ContinueLoop
EndIf
$sName = $aChunkInfo[1][1]
$sNameBare = $sName ; redundancy for non-lzo chunks
$sExtension = _getChunkExtensionByType($aChunkInfo[2][1])
$sChunkFilename = $sName & $sExtension
ConsoleWrite("[#] Adding chunk " & $i & "/" & $iTotalChunks & " (" & $sChunkFilename & ")... " & @CRLF)
If $sExtension = ".lzo" Then
Local $sTmp
$aTmp = _PathSplit($sChunkFilename, $sTmp, $sTmp, $sTmp, $sTmp)
$aTmp = _PathSplit($aTmp[3], $sTmp, $sTmp, $sTmp, $sTmp)
$sNameBare = $aTmp[3]
$iIndex = StringReplace($aTmp[4], ".", "")
If $aChunkInfo[5][1] = 1 Then
ConsoleWrite(" [#] Splitting to volume index " & $iIndex & " and recompressing..." & @CRLF)
; is a "multi-volume" LZO, dump the segment we need before compressing
$hVolumeInput = FileOpen(@ScriptDir & "\unpacked\" & $sNameBare & ".img", $FO_BINARY)
$sVolumeIntermediate = @ScriptDir & "\unpacked\" & $sNameBare & ".imga" & $sIntermediateMultiIndex
$hVolumeIntermediate = FileOpen($sVolumeIntermediate, $FO_OVERWRITE + $FO_BINARY)
FileWrite($hVolumeIntermediate, BinaryMid(FileRead($hVolumeInput), $iMultiSizePerVol * $iIndex + 1, $iMultiSizePerVol))
FileClose($hVolumeInput)
FileClose($hVolumeIntermediate)
; recompress it
RunWait(@ComSpec & ' /c ' & @ScriptDir & '\inc\lzop ' & $sLzoCompression & ' -o ' & @ScriptDir & "\unpacked\" & $sChunkFilename & ' < ' & $sVolumeIntermediate, @ScriptDir & "\unpacked", @SW_HIDE, $STDOUT_CHILD)
; increment the intermediate "volume index" (letter rather than number)
$sIntermediateMultiIndex = Chr(Asc($sIntermediateMultiIndex) + 1)
; delete the intermediate volume now that we're done recompressing it
FileDelete($sVolumeIntermediate)
Else
; not a multi-volume LZO, but still needs to be recompressed
ConsoleWrite(" [#] Recompressing..." & @CRLF)
;ConsoleWrite(@ComSpec & ' /c ' & @ScriptDir & '\inc\lzop ' & $sLzoCompression & ' -o ' & @ScriptDir & "\unpacked\" & $sChunkFilename & ' < ' & @ScriptDir & "\unpacked\" & $sNameBare & ".img")
RunWait(@ComSpec & ' /c ' & @ScriptDir & '\inc\lzop ' & $sLzoCompression & ' -o ' & @ScriptDir & "\unpacked\" & $sChunkFilename & ' < ' & @ScriptDir & "\unpacked\" & $sNameBare & ".img", @ScriptDir & "\unpacked", @SW_HIDE, $STDOUT_CHILD)
;ConsoleWrite("---" & @CRLF)
EndIf
EndIf
If Not FileExists(@ScriptDir & "\unpacked\" & $sChunkFilename) Then
ConsoleWrite(" [!] WARNING! Chunk file missing, skipping. Ensure this chunk is removed" & @CRLF)
ConsoleWrite(" from the header script - otherwise flashing the device will fail!" & @CRLF)
ContinueLoop
EndIf
; Update the header script with new size@offset values
$sOldOffsetAndSize = StringReplace($aChunkInfo[3][1] & " " & $aChunkInfo[4][1], "0x", "")
$iNewOffset = 16384 + FileGetSize($sOutputTmpChunks) ; returns 0 if file doesn't exist
$iNewSize = FileGetSize(@ScriptDir & "\unpacked\" & $sChunkFilename)
$sNewOffsetAndSize = _procHex(Hex($iNewOffset)) & " " & _procHex(Hex($iNewSize))
For $j = 0 To UBound($aHeaderScript) - 1
If StringInStr($aHeaderScript[$j], $sOldOffsetAndSize) > 0 Then
; update the in-memory header script
$aHeaderScript[$j] = StringReplace($aHeaderScript[$j], $sOldOffsetAndSize, $sNewOffsetAndSize)
; update the size parameter for this chunk's extract/write command (always appears after the chunk's load command)
$sOldSize = StringReplace($aChunkInfo[4][1], "0x", "")
For $k = $j To UBound($aHeaderScript) - 1
If StringInStr($aHeaderScript[$k], $sOldSize & " " & $sNameBare & " 1") > 0 Then
; multi-volume LZO extraction commands
$aHeaderScript[$k] = StringReplace($aHeaderScript[$k], ($sOldSize & " " & $sNameBare & " 1"), (_procHex(Hex($iNewSize)) & " " & $sNameBare & " 1"))
ElseIf StringInStr($aHeaderScript[$k], $sNameBare & " " & $sOldSize & " 1") > 0 Then
; mmc write commands
$aHeaderScript[$k] = StringReplace($aHeaderScript[$k], ($sNameBare & " " & $sOldSize & " 1"), ($sNameBare & " " & _procHex(Hex($iNewSize)) & " 1"))
EndIf
Next
; write-back changes to the INI
$aChunkInfo[3][1] = _procHex(Hex($iNewOffset))
$aChunkInfo[4][1] = _procHex(Hex($iNewSize))
IniWriteSection(@ScriptDir & "\unpacked\~bundle_info.ini", "chunk" & $i, $aChunkInfo)
EndIf
Next
;ExitLoop
; write-out this chunk
$hInput = FileOpen(@ScriptDir & "\unpacked\" & $sChunkFilename, $FO_READ + $FO_BINARY)
FileWrite($hOutputTmpChunks, FileRead($hInput))
FileFlush($hOutputTmpChunks)
FileClose($hInput)
; pad the file to the next 8KB boundary
$iFileSize = FileGetSize($sOutputTmpChunks)
$iPadding = 0
While 1
If Mod(($iFileSize + $iPadding), $iChunkPadding) = 0 Then
;ConsoleWrite(" [i] File size before padding = " & $iFileSize & @CRLF)
For $l = 1 To $iPadding
FileWrite($hOutputTmpChunks, Chr(0xFF))
Next
FileFlush($hOutputTmpChunks)
;ConsoleWrite(" [i] File size after padding = " & FileGetSize($sOutputTmpChunks) & @CRLF)
ExitLoop
Else
$iPadding = $iPadding + 1
EndIf
WEnd
; delete the recompressed lzo file if necessary
If $sExtension = ".lzo" Then
FileDelete(@ScriptDir & "\unpacked\" & $sChunkFilename)
EndIf
Next
EndFunc
Func writeHeader()
; write-out the header script
ConsoleWrite("[#] Writing header..." & @CRLF)
For $i = 0 To UBound($aHeaderScript) - 1
FileWriteLine($hOutputTmpHeader, $aHeaderScript[$i] & @LF)
Next
FileFlush($hOutputTmpHeader)
; also copy the new header script back to the unpacked folder
FileCopy($sOutputTmpHeader, @ScriptDir & "\unpacked\~bundle_script", $FC_OVERWRITE)
; pad the script to 16KB
$iPadding = 16384 - FileGetSize($sOutputTmpHeader)
For $i = 1 To $iPadding
FileWrite($hOutputTmpHeader, Chr(0xFF))
Next
FileFlush($hOutputTmpHeader)
; calculate the new script CRC for later
$iPID = Run(@ComSpec & " /c " & @ScriptDir & '\inc\crc32 ' & $sOutputTmpHeader, @ScriptDir, @SW_HIDE, $STDERR_MERGED)
$sCmdOutput = ""
Do
$sCmdOutput &= StdoutRead($iPID)
Until @error
$aResult = StringSplit($sCmdOutput, " ")
If $aResult[0] <> 2 Then
ConsoleWrite("[!] Error calculating CRC!" & @CRLF)
Exit
EndIf
$iCRC32_script = StringReplace($aResult[1], "0x", "")
ConsoleWrite("[i] Header script CRC32 = " & $iCRC32_script & @CRLF)
EndFunc
Func joinHeaderAndChunks()
ConsoleWrite("[#] Joining header and chunks..." & @CRLF)
FileFlush($hOutputTmpHeader)
FileWrite($hOutput, FileRead($sOutputTmpHeader))
FileFlush($hOutput)
FileFlush($hOutputTmpChunks)
FileWrite($hOutput, FileRead($sOutputTmpChunks))
FileFlush($hOutput)
EndFunc
Func writeFooter()
FileWrite($hOutput, $MAGIC_FOOTER)
FileFlush($hOutput)
FileWrite($hOutput, _BinaryReverse("0x" & $iCRC32_script))
FileFlush($hOutput)
$iCRC32_unknown = IniRead(@ScriptDir & "\unpacked\~bundle_info.ini", "common", "crc32_unknown", 0)
FileWrite($hOutput, _BinaryReverse($iCRC32_unknown))
FileFlush($hOutput)
$sFooterCmd = IniRead(@ScriptDir & "\unpacked\~bundle_info.ini", "common", "footer_cmd", 0)
;ConsoleWrite("'" & IniRead(@ScriptDir & "\unpacked\~bundle_info.ini", "common", "footer_cmd", 0) & "'" & @CRLF)
FileWrite($hOutput, $sFooterCmd)
FileFlush($hOutput)
EndFunc
Func cleanup()
;ConsoleWrite("[#] Cleaning up..." & @CRLF)
If FileExists($sOutputTmpHeader) Then FileDelete($sOutputTmpHeader)
If FileExists($sOutputTmpChunks) Then FileDelete($sOutputTmpChunks)
EndFunc