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#!/bin/bash

DIR_BIN=$1
DIR_SIGNED=$2

TMP_DIR=$DIR_SIGNED/tmp$$
SIGN_LOG=sign.log

GPG_VER=`gpg --version | head -n 1 | sed -e 's/gpg (GnuPG) //'`

if [ -z $DIR_BIN ] ; then
	echo "Specify original directory as first argument."
	exit 1
fi

if [ -z $DIR_SIGNED ] ; then
	echo "Specify destination directory as second argument."
	exit 1
fi

if [ ! -e $DIR_BIN ] ; then
	echo "Original directory $DIR_BIN doesn't exist."
	exit 1
fi

list_of_packages=`find $DIR_BIN -type f -name "*.deb"`
list_of_udebs=`find $DIR_BIN -type f -name "*.udeb"`
#echo $list_of_packages

for i in $list_of_packages ; do
	pack_name=`echo $i | awk '{sub(/^.+\//,"",$0) ; a=$0; print a}'`
	mkdir -p $TMP_DIR/{control,data}
	cp $i $TMP_DIR
	pushd $TMP_DIR
	ar x $pack_name

# Definig archives type
	data_arch_type=`ls data.tar* | cut -d'.' -f3`
	control_arch_type=`ls control.tar* | cut -d'.' -f3`
	popd

# Unpack data archive
	pushd $TMP_DIR/data
	case $data_arch_type in
	        xz)
		tar --same-permissions --same-owner -xJf ../data.tar.xz
		;;
		gz)
		tar --same-permissions --same-owner -xzf ../data.tar.gz
		;;
		bz2)
		tar --same-permissions --same-owner -xjf ../data.tar.bz2
		;;
		lzma)
		tar --same-permissions --same-owner --lzma -xf ../data.tar.lzma
		;;
	esac
	popd

# Unpack control archive
	pushd $TMP_DIR/control
	case $control_arch_type in
		xz)
		tar --same-permissions --same-owner -xJf ../control.tar.xz
		;;
	        gz)
		tar --same-permissions --same-owner -xzf ../control.tar.gz
		;;
		bz2)
		tar --same-permissions --same-owner -xjf ../control.tar.bz2
		;;
		lzma)
		tar --same-permissions --same-owner --lzma -xf ../control.tar.lzma
		;;
	esac
	popd

# Sign files
	pushd $TMP_DIR/data
	for file in `find . -type f` ; do
	    if [ -x $file ] || [ "`echo $file | sed -e 's/^.*\.so.*$/so/g'`" = "so" ] ; then
		if [ ! -L $file ]; then
		    oldstat=`stat -c %a $file`
		    GPG2OPTS=
		    if [ "$GPGVER" = "2.1.18" ] || [ ! "$GPGVER" = "1.4.18" ]; then
			GPG2OPTS="--batch --pinentry-mode=loopback"
		    fi
		    bsign -N -s --pgoptions="--default-key 12345678 $GPG2OPTS --passphrase-file ./key_password.txt" $file
		    bsign -V $file | grep -v "not ELF64"
		    bsign -w $file | grep -v "not ELF64"
		    newstat=`stat -c %a $file`
		    [ $newstat != $oldstat ] && echo "BSIGN_CHMOD_ERROR in $file" >> ${SIGN_LOG} 2>&1
		fi
	    fi
	done
	popd

# Counting md5sums
	pushd $TMP_DIR/control
	if [ -e ./md5sums ] ; then
		filenames=`cat md5sums | awk -F'  ' '{print $2}'`
		popd
		pushd $TMP_DIR/data
		for j in $filenames
		do
			echo `md5sum $j` >> $TMP_DIR/control/md5sums.new
		done
		sed -e 's/\ /\ \ /g' $TMP_DIR/control/md5sums.new > $TMP_DIR/control/md5sums.new_mod
		popd
		mv -f $TMP_DIR/control/md5sums.new_mod $TMP_DIR/control/md5sums
		rm -f $TMP_DIR/control/md5sums.new
	fi

# Packing back in deb
	pushd $TMP_DIR/data
	case $data_arch_type in
		xz)
		tar --same-permissions --same-owner -cJf ../data.tar.xz .
		;;
	        gz)
		tar --same-permissions --same-owner -czf ../data.tar.gz .
		;;
		bz2)
		tar --same-permissions --same-owner -cjf ../data.tar.bz2 .
		;;
		lzma)
		tar --same-permissions --same-owner --lzma -cf ../data.tar.lzma .
		;;
	esac
	popd

	pushd $TMP_DIR/control
	case $control_arch_type in
    		xz)
		tar --same-permissions --same-owner -cJvf ../control.tar.xz .
		;;
		gz)
		tar --same-permissions --same-owner -czvf ../control.tar.gz .
		;;
		bz2)
		tar --same-permissions --same-owner -cjvf ../control.tar.bz2 .
		;;
		lzma)
		tar --same-permissions --same-owner --lzma -cvf ../control.tar.lzma .
		;;
	esac
	popd
	pushd $TMP_DIR
	ar rcs $TMP_DIR/$pack_name debian-binary control.tar.$control_arch_type data.tar.$data_arch_type
	cp $pack_name  $DIR_SIGNED/
	popd
	rm -rf $TMP_DIR
done

for j in $list_of_udebs ; do
    cp $j $DIR_SIGNED
done

echo "Sign done"