A .local/bin/backup-secret-key

@@ -0,0 +1,55 @@
+#!/bin/sh
+
+ERR_1_MSG="Please specify valid uid or keyid."
+QRENCODE_FLAGS="-8 -l H"
+
+[ -z $1 ] && ( echo $ERR_1_MSG && exit 1 )
+
+gpg -K $1 > /dev/null || ( echo $ERR_1_MSG && exit 1 )
+
+export_secret() {
+    gpg --export-secret-keys $1 \
+        | paperkey --output-type raw 
+}
+
+export_public() {
+    gpg --export $1
+}
+
+qr_png_prettify () {
+    OUTPUT_TITLE="$1 paperkey backup   $(date +"%F %T")"
+    montage -pointsize 18 \
+            -title "$OUTPUT_TITLE" \
+            -label pubkey "$2" \
+            -label seckey "$3" \
+            -mode concatenate \
+            backup.png
+}
+
+qr_png () {
+    QRENCODE_FLAGS="${QRENCODE_FLAGS} -t png -s 10"
+    QRENCODE_PUBKEY_FLAGS="${QRENCODE_FLAGS} -o $1-pubkey.png"
+    QRENCODE_SECKEY_FLAGS="${QRENCODE_FLAGS} -o $1-seckey.png"
+
+    export_secret $1 | qrencode $QRENCODE_SECKEY_FLAGS
+    export_public $1 | qrencode $QRENCODE_PUBKEY_FLAGS
+
+    qr_png_prettify $1 "$1-pubkey.png" "$1-seckey.png"
+
+    rm "$1-pubkey.png" "$1-seckey.png"
+}
+
+qr_utf8 () {
+    QRENCODE_FLAGS="${QRENCODE_FLAGS} -t UTF8 -o -"
+
+    echo "$1 secret paperkey"
+    export_secret $1 | qrencode $QRENCODE_FLAGS
+    echo "$1 public key"
+    export_public $1 | qrencode $QRENCODE_FLAGS
+}
+
+case $2 in
+    "png" ) qr_png $1 ;;
+    * ) qr_utf8 $1 ;;
+esac
+