23 lines
710 B
Bash
23 lines
710 B
Bash
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#!/usr/bin/env nix-shell
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#!nix-shell -i bash -p bash openssl
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# Check if the user provided a file name as an argument
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if [ $# -eq 0 ]; then
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echo "Expected usage: decrypt.sh <filename>"
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exit 1
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fi
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# Store the provided filename in a variable
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file_name="$1"
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# Check if the provided argument is a file and not a folder
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if [ ! -f "$file_name" ]; then
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echo "Error: '$file_name' is not a valid file. Look inside the 'files' folder with 'ls -R'!"
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exit 1
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fi
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# If there's an error reading the file, print an error message
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if ! openssl enc -d -aes-256-cbc -pbkdf2 -iter 100000 -salt -in "$file_name" -k picoCTF; then
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echo "Error: Failed to decrypt '$file_name'. This flag is fake! Keep looking!"
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fi
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