if [ $# -lt 1 ]

echo $0" infile [outfile]"

infile=$1

keyfile=$infile".key"

if [[ ! -z $2 ]]

outfile=$2

outfile=${infile/%.enc/}

if [[ $infile == $outfile ]]

then

echo ".enc extension missing from input file, manually specify output file"

exit 1

fi

if [[ ! -f $infile ]]

echo $infile" not found"

if [[ ! -f $keyfile ]]

if ! serial=$(connectadb)

then

echo "Device not found"

exit 1

fi

if ! adb -s $serial shell 'su -c ls /data/data/org.telegram.messenger/cache/'$keyfile >/dev/null 2>/dev/null

then

echo "Remote key file not found"

exit 1

fi

key=$(adb -s $serial shell 'su -c xxd -p -c256 /data/data/org.telegram.messenger/cache/'$keyfile | tr -d '\n ' | head -c64)

iv=$(adb -s $serial shell 'su -c xxd -p -c256 /data/data/org.telegram.messenger/cache/'$keyfile | tr -d '\n ' | tail -c +65 | head -c 24)

if [[ -z $key || -z $iv ]]

then

echo "Key file exists, but is not long enough"

exit

fi

iv=$iv"00000000"

key=$(xxd -p -c999 $keyfile | head -c64)

iv=$(xxd -p -c999 $keyfile | tail -c +65 | head -c 24)"00000000"

openssl enc -d -aes-256-ctr -nosalt -in $infile -K $key -iv $iv -out $outfile