A .local/bin/print_codes

@@ -0,0 +1,97 @@
+#!/bin/sh
+
+# Copyright (c) 2021, la-ninpre
+#
+# Permission to use, copy, modify, and/or distribute this software for any
+# purpose with or without fee is hereby granted, provided that the above
+# copyright notice and this permission notice appear in all copies.
+# 
+# THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
+# WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
+# MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
+# ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
+# WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
+# ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
+# OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
+
+
+# small script to create page with qr-coded recovery tokens for otp
+# uses: qrencode, imagemagick(convert, montage)
+#
+# file with codes should be in following format:
+# - recovery codes should be on separate lines
+# - every line beginning with # is ignored
+
+QRENCODE_ERR_CORR_LEVEL=H
+CODES_KEEP_PNG=0
+CODES_MAKE_PDF=0
+
+usage() {
+    echo "create qr-coded recovery tokens for easy printing"
+    echo
+    echo "USAGE:"
+    echo "  $0 [OPTIONS] <text-file>"
+    echo
+    echo "OPTIONS:"
+    echo "  -k  keep png files with qrcodes"
+    echo "  -l {L,M,Q,H}"
+    echo "      set qrencode error correction level"    
+    echo "  -p  produce pdf instead of image"
+    echo "  -h  print this help message"
+    echo
+}
+
+while getopts kl:ph arg
+do
+    case "$arg" in
+        k) CODES_KEEP_PNG=1
+            ;;
+        l) case $OPTARG in
+            [lL]) QRENCODE_ERR_CORR_LEVEL=L ;;
+            [mM]) QRENCODE_ERR_CORR_LEVEL=M ;;
+            [qQ]) QRENCODE_ERR_CORR_LEVEL=Q ;;
+            [hH]) QRENCODE_ERR_CORR_LEVEL=H ;;
+            *)  echo "error correction level should be one of L, M, Q or H"
+                exit 1 ;;
+            esac
+            ;;
+        p) CODES_MAKE_PDF=1
+            ;;
+        h|*) usage && exit 1
+            ;;
+    esac
+done
+
+shift $((OPTIND - 1))
+
+[ $# -ne 1 ] && usage && exit 1
+
+CODES_FILE="$1"
+CODES_BASENAME="${CODES_FILE%%.*}"
+CODES_EXT="${CODES_FILE##*.}"
+CODES_DIR="$PWD/${CODES_BASENAME}_${CODES_EXT}_dir"
+CODES_DATE="$(date +'%Y-%m-%d %H:%M')"
+CODES_OUTPUT="${CODES_BASENAME}_qrcodes"
+CODES_OUT_IMG="${CODES_OUTPUT}.png"
+CODES_OUT_PDF="${CODES_OUTPUT}.pdf"
+
+rm -f "$CODES_OUT_IMG" "$CODES_OUT_PDF"
+[ -d "$CODES_DIR" ] && rm -rf "$CODES_DIR"
+mkdir "$CODES_DIR"
+
+sed -e '/^#.*/ d' -e '/^\s*$/ d' < "$CODES_FILE" \
+    | xargs -I{} \
+    qrencode -l "$QRENCODE_ERR_CORR_LEVEL" -t png -d 150 \
+    -o "$CODES_DIR/{}-code.png" {}
+
+montage -title "\n$CODES_FILE\n$CODES_DATE" \
+    "$CODES_DIR/*-code.png" -page a4 -geometry 128x128\> "$CODES_OUT_IMG"
+
+[ "$CODES_MAKE_PDF" -ne 0 ] && {
+    convert \( -size 1240x1754 xc: \) "$CODES_OUT_IMG" \
+        -composite "$CODES_OUT_PDF"
+    [ "$CODES_KEEP_PNG" -eq 0 ] && rm -f "$CODES_OUT_IMG"
+    }
+
+[ "$CODES_KEEP_PNG" -eq 0 ] && rm -rf "$CODES_DIR" || exit 0
+