A simple bash script to grep within a bunch of GPG encrypted files.

grep-with-gpg.sh

#!/bin/bash
#
# Usage grep-with-gpg path/to/encrypted/files/*
#

if [ -z "$1" ]; then
    echo "Usage: $0 'search string' [path/to/encrypted/files/*]";
    exit 1;
else
    SEARCH=$1;
fi

TMPDIR="/tmp/${0##*/}-$$";

if [ -d "$TMPDIR" ]; then
    if [ ! -w "$TMPDIR" ]; then
        echo "Error: cannot delete $TMPDIR"
        exit 1;
    else
        rm -rf $TMPDIR
    fi
fi

mkdir -v "$TMPDIR";

echo "Searching for $SEARCH ...";

function decrypt {
    declare dir=${0}
    declare relative=${1/#$dir\//}
    declare full=${1}
    mkdir -p $(dirname $full)
    gpg --quiet --batch -d --output "${full}.txt" --yes --compress-algo=none --no-encrypt-to --use-agent "${relative}" > /dev/null
}

export -f decrypt
find ${@:2} -type f -name '*.gpg' -exec bash -c 'decrypt "$0/$1"' $TMPDIR {} \;


if [ "$(ls -A $TMPDIR)" ]; then
    grep --color=always -rni "$SEARCH" $TMPDIR

    # Shred files
    if type shred > /dev/null ; then
        # shred is present in PATH
        find ${TMPDIR} -type f -exec shred -n 25 -u -z {} \;
    fi

    rm -rf ${TMPDIR}

else
    echo "Error decrypting files.";
fi

exit 1;