74 lines
No EOL
2.5 KiB
Bash
74 lines
No EOL
2.5 KiB
Bash
#!/bin/bash
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echo "GPG Encrypted Message Utility"
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echo "1) Write (Encrypt & Sign a message)"
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echo "2) Read (Decrypt a message)"
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echo "3) Import someone's public key"
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read -p "Select an option (1, 2, or 3): " option
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echo ""
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if [ "$option" == "1" ]; then
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# WRITING / ENCRYPTING
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read -p "Enter the recipient's email address: " email
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read -p "Enter the name for the output file (e.g., secret.asc): " outfile
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echo "----------------------------------------"
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echo "Type your secret message below."
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echo "When you are finished, press [Enter] to go to a new line, then press [Ctrl+D]."
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echo "----------------------------------------"
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# This reads directly from the terminal input and feeds it to GPG
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gpg --encrypt --sign --armor --recipient "$email" > "$outfile"
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if [ $? -eq 0 ]; then
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echo ""
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echo "Success! Message encrypted and saved to '$outfile'."
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echo "You can now safely send this file to $email."
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else
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echo ""
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echo "Error: Encryption failed. Are you sure you imported their public key?"
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fi
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elif [ "$option" == "2" ]; then
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# READING / DECRYPTING
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read -p "Enter the path to the encrypted file (e.g., secret.asc): " infile
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if [ -f "$infile" ]; then
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echo ""
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echo "Decrypting message..."
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echo "----------------------------------------"
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# GPG automatically knows to use your private key to decrypt
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gpg --decrypt "$infile"
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echo ""
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echo "----------------------------------------"
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else
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echo "Error: File '$infile' does not exist in this directory."
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fi
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elif [ "$option" == "3" ]; then
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# IMPORTING PUBLIC KEY
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read -p "Enter the path to the public key file you want to import (e.g., friend_key.asc): " keyfile
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if [ -f "$keyfile" ]; then
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echo ""
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echo "Importing public key from '$keyfile'..."
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echo "----------------------------------------"
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gpg --import "$keyfile"
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if [ $? -eq 0 ]; then
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echo "----------------------------------------"
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echo "Success! The public key has been added to your keychain."
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echo "You can now use Option 1 to send encrypted messages to this person."
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else
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echo "----------------------------------------"
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echo "Error: Failed to import the key. Make sure it is a valid GPG public key file."
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fi
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else
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echo "Error: File '$keyfile' does not exist in this directory."
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fi
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else
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echo "Invalid option selected. Exiting."
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fi |