43 lines
1.1 KiB
Bash
Executable file
43 lines
1.1 KiB
Bash
Executable file
#!/usr/bin/env bash
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if [ -z "$1" ] || [ -z "$2" ] || [[ $2 != "encode" && $2 != "decode" ]]
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then echo "launch the script with the desired filename and operation"
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echo "./AmazonPrimeWhatever.sh FILENAME OPERATION(encode or decode)"
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exit
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fi
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image="kitten.jpg"
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imagesize=$(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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if [ $2 = "encode" ]
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then cp $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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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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echo ""
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echo "end of my job"
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