utils/ypr0tools/unpack-firmware.sh

   1 #!/bin/bash
   2
   3 ######################################################################
   4 #             __________               __   ___.
   5 #   Open      \______   \ ____   ____ |  | _\_ |__   _______  ___
   6 #   Source     |       _//  _ \_/ ___\|  |/ /| __ \ /  _ \  \/  /
   7 #   Jukebox    |    |   (  <_> )  \___|    < | \_\ (  <_> > <  <
   8 #   Firmware   |____|_  /\____/ \___  >__|_ \|___  /\____/__/\_ \
   9 #                     \/            \/     \/    \/            \/
  10 #
  11 #   * Script to unpack a Samsung YP-R0 firmware file (R0.ROM) */
  12 ######################################################################
  13
  14 # The file was originally called MuonDecrypt.sh
  15 #
  16 # I'm not sure about the original author of this file, as it wasn't included in Samsung package.
  17 # But I guess it was done by JeanLouis, an Italian user of the Hardware Upgrade Forum. If needed, we should search throug old posts for that...
  18 #
  19
  20
  21 # bail out early
  22 set -e
  23
  24 # some sanity checks
  25 if [ $# -lt 1 ] || [ $# -gt 2 ]; then
  26     echo "Usage $0 <rom file> [out dir]"
  27     exit 1
  28 fi
  29
  30
  31 ROM=$1
  32 DIR=${2:-"."}
  33 DIR=${DIR%/}
  34 MBOOT="$DIR/MBoot.bin"
  35 MBOOT_TMP="${TMP_DIR:-$DIR}/MBoot.tmp"
  36 LINUX="$DIR/zImage"
  37 CRAMFS="$DIR/cramfs-fsl.rom"
  38 SYSDATA="$DIR/SYSDATA.bin"
  39 MD5SUMS="$DIR/MD5SUMS"
  40 TMP="${TMP_DIR:-$DIR}/_$$.tmp"
  41
  42
  43 if [ ! -f ./extract_section ]; then
  44     echo "Couldn't find extract_section binary (try 'make')"
  45     exit 1
  46 fi
  47
  48 if [ ! -f ./MuonEncrypt ]; then
  49     echo "Couldn't find MuonEncrypt binary (try 'make')"
  50     exit 1
  51 fi
  52
  53 mkdir -p $DIR
  54
  55 if [ ! -w $DIR ]; then
  56     echo "Target dir not writable"
  57     exit 1
  58 fi
  59
  60 ExtractAndDecrypt() {
  61         START=$(expr $START - $2)
  62         echo "Extracting $1..."
  63         ./extract_section $ROM $TMP $START $2
  64         echo "Decrypt $1..."
  65         ./MuonEncrypt $TMP > $1
  66 }
  67
  68 size=( `head -n 9 $ROM | tail -n 4 | while read LINE; do echo $LINE | cut -d\( -f 2 | cut -d\) -f 1; done`)
  69 checksum=( `head -n 9 $ROM | tail -n 4 | while read LINE; do echo $LINE | cut -d\( -f 3 | cut -d\) -f 1; done`)
  70
  71 echo "${checksum[0]}  $MBOOT" > $MD5SUMS
  72 echo "${checksum[1]}  $LINUX" >> $MD5SUMS
  73 echo "${checksum[2]}  $CRAMFS" >> $MD5SUMS
  74 echo "${checksum[3]}  $SYSDATA" >> $MD5SUMS
  75
  76 START=`stat -c%s $ROM`
  77
  78 ExtractAndDecrypt $SYSDATA ${size[3]}
  79 ExtractAndDecrypt $CRAMFS ${size[2]}
  80 ExtractAndDecrypt $LINUX ${size[1]}
  81 ExtractAndDecrypt $MBOOT_TMP ${size[0]}
  82
  83 rm $TMP
  84 echo "Create $MBOOT..."
  85 dd if=$MBOOT_TMP of=$MBOOT bs=96 count=1 2>/dev/null
  86 dd if=$MBOOT_TMP of=$MBOOT bs=1088 skip=1 seek=1 2>/dev/null
  87 rm $MBOOT_TMP
  88
  89 echo "Check integrity:"
  90 md5sum -c $MD5SUMS