A gpg wrapper to decrypt files.

decrypt-with-gpg.sh

#!/bin/bash
#
# decrypt-with-gpg
#

usage="$0 path/to/encripted/file.txt"

if [ ! $# -eq 0 ] ; then
 
    param=$1
    error=1

    if [ ! -f "$param" ] ; then
        # No such file
        error=0
        echo "Error: File \"$param\" does not exist"
        exit 1
    fi

    if ! type gpg > /dev/null ; then
        # gpg is not present in PATH
        error=0
        echo "Error: gpg is not installed. Please install gpg first."
        exit 1
    fi

    if [ $error -eq 1 ] ; then
        # Decrypt
        TMPFILE="/tmp/${0##*/}-$$"
        echo "$TMPFILE"
        gpg --decrypt "$param" > "$TMPFILE"
        cat "$TMPFILE"

        if ! type shred > /dev/null ; then
            rm "$TMPFILE"
        else
            # shred is present in PATH
            shred "$TMPFILE"
        fi

        # Prompt for clear terminal
        echo
        echo
        echo "=== End ==="
        echo
        read -r -p "Clear terminal? (y/n) : " choice
        case "$choice" in 
          y|Y ) clear;;
          * ) exit 1;;
        esac
    else
        echo "Error: There was an unknown error." 
        exit 1
    fi

else
    echo "Usage:"
    echo "$usage"
    exit 1
fi