bin/mega-dl.sh

#!/bin/bash

if [[ $# != 2 ]]; then 
    echo "usage: mega-dl.sh <url> <output>"
    exit 1
fi

url="$1"
enc_file="$2.enc"
out_file="$2"

id=`echo $url | awk -F '!' '{print $2}'`
key=`echo $url | awk -F '!' '{print $3}' | sed -e 's/-/+/g' -e 's/_/\//g' -e 's/,//g'`
b64_hex_key=`echo -n $key | base64 --decode --ignore-garbage 2> /dev/null | xxd -p | tr -d '\n'`
key[0]=$(( 0x${b64_hex_key:00:16} ^ 0x${b64_hex_key:32:16} ))
key[1]=$(( 0x${b64_hex_key:16:16} ^ 0x${b64_hex_key:48:16} ))
key=`printf "%x" ${key[*]}`
iv="${b64_hex_key:32:16}0000000000000000"
response=`curl --silent --request POST --data-binary '[{"a":"g","g":1,"p":"'$id'"}]' https://eu.api.mega.co.nz/cs`
echo "$response"
new_url=`echo "$response" | awk -F '"' '{print $10}'`
curl --output "$enc_file" "$new_url"
openssl enc -d -aes-128-ctr -K $key -iv $iv -in "$enc_file" -out "$out_file"
rm -f "$enc_file"