importsigs.sh

#!/bin/sh

# This tries to import PGP data contained in a mail message
# Depends on:
# - GPGKEY having the value of my key
# - gpglist (part of signing-party package) (perl scripts)
# -
#
# Programs used
ZN=zenity
NM=notmuch
GPG=gpg
PERL=perl

# Generic error dialog with zenity
function error {
    $ZN --error --text="$1"
}

# Try to get signatures from a file
function sigfromfile {
    echo file: $1

    echo "# Trying direct import"
    $GPG --import $1 2>&1

    if [[ $? -ne 0 ]]; then
	echo "# Plain import failed, trying decrypting it first"
	$GPG -d $1 | $GPG --import 2>&1
    fi
    return $?
}

# Process cmdline args
case $# in
    2)
	# Both thread and message id
	msg_id=$2
	# Fallthrough
	;&
    1)
	# Just the thread id
	thr_id=$1
	;;
    *)
	error "Got $# arguments. ImportSig takes 1 or 2 arguments (thread_id and optional message_id)"
	exit 1
esac


if [[ $msg_id ]]; then
    (
	echo "Determining message filename"
	FILE=`$NM search --exclude=false --output=files "id:$msg_id"`
	# Try message file as a whole first
	sigfromfile $FILE
       	
	if [[ $? -ne 0 ]]; then
	    echo "# Decrypt message failed, trying attachments explicitly"
	    T=`mktemp -d`
	    mu extract --target-dir=$T --save-attachments $FILE
	    for att in `ls -1 $T`; do
		# extract from each attachment
		sigfromfile $T/$att
	    done
	fi

	echo "# Fetching unknown users"
	for KEY in `gpglist $GPGKEY | grep 'User ID not found' | $PERL -nwe '/([0-9A-F]{16})/ && print "$1\n"'`; do
	    $GPG --recv-keys $KEY 2>&1
	    gpglist $GPGKEY | grep $KEY
	done

	echo "# DONE"
    ) | $ZN --text-info --width 1000 --height 300 --auto-scroll \
	    --title="Trying to import PGP data from message..." \
	    --font=Monospace
fi