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@@ -0,0 +1,49 @@
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+#!/usr/bin/env bash
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+
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+if [ -z "$1" ] || [ -z "$2" ] || [[ $2 != "encode" && $2 != "decode" ]]
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+ then echo "launch the script with the desired filename and operation"
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+ echo "./AmazonPrimeWhatever.sh FILENAME OPERATION(encode or decode)"
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+ exit
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+fi
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+
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+
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+
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+
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+if [ $2 = "encode" ]; then
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+ imagejpg="random.jpg"
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+ image="random.DNG"
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+ #generate random image:
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+ mx=320;my=256;head -c "$((3*mx*my))" /dev/urandom | convert -depth 8 -size "${mx}x${my}" RGB:- $imagejpg
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+ mv $imagejpg $image
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+ imagesize=$(du -b $image | cut -f1)
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+ origsha=$(sha1sum $1 | cut -d " " -f1)
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+ destimage="FakeKitten_"$imagesize"_"$1"_"$origsha"_"$image
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+ mv $image $destimage
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+ dd if=$1 bs=1M >> "$destimage"
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+ echo "encode completed in $destimage"
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+fi
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+
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+if [ $2 = "decode" ]; then
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+ imagebs=$(echo $1 | cut -d "_" -f2)
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+ origname=$(echo $1 | cut -d "_" -f3)
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+ origsha=$(echo $1 | cut -d "_" -f4)
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+ origimage=$(echo $1 | cut -d "_" -f5)
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+ dd if=$1 bs=1M skip=$imagebs iflag=skip_bytes > "$origname"
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+ echo "decode completed in $origimage, checking file integrity"
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+ echo $origsha" "$origname > $origname".sha1"
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+ shaoutput=$(sha1sum -c $origname".sha1")
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+ echo $shaoutput
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+ if [[ $shaoutput != *"OK"* ]]; then
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+ echo ""
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+ echo "!!! FAILED SHA VERIFICATION!!! EXITING"
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+ echo "!!! DELETING ALL CREATED FILES !!!"
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+ rm $origname
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+ rm $origname".sha1"
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+ exit
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+ fi
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+ rm $origname".sha1"
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+fi
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+
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+
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+echo ""
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+echo "end of my job"
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m