1 files changed, 111 insertions, 0 deletions
diff --git a/gpg/card/makecard b/gpg/card/makecard
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+++ b/gpg/card/makecard
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+#!/bin/bash
+#
+# Creates an OpenPGP fingerprint business card.
+# This script uses an SVG file as a template and replaces
+# values such as $NAME and $FINGERPRINT with contents extracted
+# from a key.
+#
+# Note that this script uses "gpg --with-colons" to parse key information.
+# Documentation on the returned format can be found in "doc/DETAILS"
+# of the GnuPG distribution.
+
+set -e
+
+# Show help
+print_usage() {
+cat <<- EOF
+makecard - Create business cards with GnuPG
+
+    $0 [-t template] gpgid
+
+Print an SVG business card containing an OpenPGP fingerprint to standard output.
+
+    -t template
+        Use the file <template> as an SVG template for the business card.
+
+    gpgid
+        GnuPG id used on card. This may be anything accepted by gpg, such as an email address, key id or fingerprint.
+
+EOF
+}
+
+# Parameters
+#
+
+# GPG key identity to use
+GPGID=
+
+# Template file in which to replace variables
+TEMPLATE="multiple.svg"
+
+# Process command-line parameters
+while test $# -gt 0; do
+	case "$1" in
+		-h)
+			print_usage
+			exit 0
+			;;
+		-t)
+			shift
+			if [ $# -gt 0 ]; then
+				TEMPLATE=$1
+			else
+				echo "No template specified. Aborting." 1>&2
+				exit 1
+			fi
+			;;
+		*)
+			GPGID=$1
+			;;
+	esac
+	shift
+done
+
+# Parameters processed beyond this point
+if [ -z "$GPGID" ]; then
+	echo "No gpg identity specified. Aborting." 1>&2
+	exit 1
+fi
+if [ ! -e "$TEMPLATE" ]; then
+	echo "Template not found. Aborting." 1>&2
+	exit 1
+fi
+
+
+# Compute number of keys available under given identity
+NUMKEYS=$(gpg --with-colons --list-keys "$GPGID" | awk -F: '/^fpr/{ print $10 }' | wc -l)
+
+# Only one key is supported by this script
+if [ "$NUMKEYS" -eq 0 ]; then
+	echo "No keys found for $GPGID. Aborting." 1>&2
+	exit 1
+fi
+if [ "$NUMKEYS" -gt 1 ]; then
+	echo "More than one key found for $GPGID. Aborting." 1>&2;
+	exit 1
+fi
+
+# Extract name
+USERID=$(gpg --with-colons --list-keys --fingerprint "$GPGID" | awk -F: '/^pub/{ print $10 }')
+NAME=$(echo "$USERID"| awk -F' <' '{ print $1 }')
+
+# Extract fingerprint
+FINGERPRINT=$(gpg --with-colons --list-keys "$GPGID" | awk -F: '/^fpr/{ print $10 }')
+# First 20 characters of fingerprint, separated intp groups of 4
+FP1=$(echo "$FINGERPRINT" | cut -c1-20 | fold -w4 | paste -sd\  -)
+# Second 20 characters of fingerprint, separated intp groups of 4
+FP2=$(echo "$FINGERPRINT" | cut -c21-40 | fold -w4 | paste -sd\  -)
+
+# Data to include in QR code
+# Remove "options=mr" from URL query to get human-readable output
+QRDATA="https://pgp.mit.edu/pks/lookup?op=get&options=mr&search=0x$FINGERPRINT"
+
+# Encode QR code
+QRCODE="data:image/png;base64,$(echo "$QRDATA" | qrencode -t PNG -m 0 -o - | base64)"
+
+# Replace variables in tamplate
+cat "$TEMPLATE" \
+ | sed "s/\$NAME/$NAME/g" \
+ | sed "s/\$FP1/$FP1/g" \
+ | sed "s/\$FP2/$FP2/g" \
+ | awk -v QRCODE="$QRCODE" '{ gsub(/\$QRCODE/, QRCODE); print }'
+\ No newline at end of file