Add zbar-tools package to read QRs using webcam and `create-key-sha…

…re-card` script
aitorpazos · Mar 27, 2021 · 41a111c · 41a111c
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diff --git a/CHANGELOG.md b/CHANGELOG.md
@@ -4,6 +4,13 @@ All notable changes to this project will be documented in this file.
 The format is based on [Keep a Changelog](https://keepachangelog.com/en/1.0.0/),
 and this project adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0.html).
 
+## [0.8.0] - 2021-03-27
+
+### Added
+
+- `zbarcam` tool to be able to scan QR codes using the webcam
+- `create-key-share-card` script to generate printable cards in xfce ISO
+
 ## [0.7.0] - 2021-03-14
 
 ### Added

diff --git a/files-min/config/README.txt b/files-min/config/README.txt
@@ -16,6 +16,8 @@ echo "My passphrase" | scrypt-rs -l<generated key length> -s <salt string>
 echo "My text" | qrencode -o <qr file.png>
 - Display QR image:
 display <qr file.png>
+- Scan QR code using webcam:
+zbarcam --raw
 
 If you are dealing with BIP39 word lists or seeds you can use the `hal` command:
 hal bip39 get-seed "your BIP words" | jq -r .entropy | ssss-split -t <x> -n <n>

diff --git a/files-min/config/packages b/files-min/config/packages
@@ -18,3 +18,4 @@ xbitmaps
 xdg-user-dirs 
 xinit
 xterm
+zbar-tools
diff --git a/files-min/config/shamir-background.png b/files-min/config/shamir-background.png
diff --git a/files-xfce/config/README.txt b/files-xfce/config/README.txt
@@ -16,6 +16,8 @@ echo "My passphrase" | scrypt-rs -l<generated key length> -s <salt string>
 echo "My text" | qrencode -o <qr file.png>
 - Display QR image:
 display <qr file.png>
+- Scan QR code using webcam:
+zbarcam --raw
 
 If you are dealing with BIP39 word lists or seeds you can use the `hal` command:
 hal bip39 get-seed "your BIP words" | jq -r .entropy | ssss-split -t <x> -n <n>
@@ -30,6 +32,12 @@ If you don't select the correct number of words, the generation will fail. Howev
 
 ## Experimental USB printer support:
 
+- You can generate a card that you can print using your browser with the following command:
+create-key-share-card SHARE_NAME SHARE_KEY_VALUE
+
+This command will generate a SHARE_NAME.htm file that you can open in the browser and print it from it after you
+configure a printer.
+
 - Add a printer (user: user , password: user) using CUPS admin page in the browser:
 http://127.0.0.1:631/admin
 - Display detected printers:

diff --git a/files-xfce/config/configure.sh b/files-xfce/config/configure.sh
@@ -9,7 +9,8 @@ chmod a+r /usr/share/pixmaps/shamir-background.png
 
 cp /root/hal /usr/bin/
 cp /root/scrypt-rs /usr/bin/
-chmod a+rx /usr/bin/hal /usr/bin/scrypt-rs
+cp /root/create-key-share-card /usr/bin/
+chmod a+rx /usr/bin/hal /usr/bin/scrypt-rs /usr/bin/create-key-share-card
 
 cat > /etc/skel/.config/epiphany/web-extension-settings.ini << EOF
 [org/gnome/epiphany]

diff --git a/files-xfce/config/create-key-share-card b/files-xfce/config/create-key-share-card
@@ -0,0 +1,100 @@
+#!/usr/bin/env bash
+
+function usage() {
+  cat << EOF
+Incorrect parameters used.
+
+Usage: $0 SHARE_NAME SHARE_KEY_VALUE
+  SHARE_NAME      An arbitrary short name for the share
+  SHARE_KEY_VALUE Value string of the key share (use - to read string from standard input)
+
+This script will generate SHARE_NAME.htm and SHARE_NAME.png files that can be used to print the share as card.
+EOF
+}
+
+if [ "$#" -ne 2 ]; then
+  usage;
+  exit 1
+fi
+
+NAME=$1
+INPUT_KEY=$2
+
+QR_IMG="./${NAME}.png"
+
+if [ "${INPUT_KEY}" = "-" ]; then
+  read
+  INPUT_KEY="${REPLY}"
+fi
+
+echo "${INPUT_KEY}" | qrencode -o ${QR_IMG}
+
+cat > ${NAME}.htm << EOHTML
+<html>
+<head>
+<title>Shamir key part card - ${NAME}</title>
+<style>
+body { background-color: white; font-family: sans-serif}
+.card { border: solid black 1mm; padding: 2mm; margin: 1mm; width: 10cm; height: 6cm; }
+.header { font-weight: bolder; font-size: 16pt; text-align: center; height: 10mm; }
+.content { display: flex; height: 47mm; }
+.footer { font-size: 8pt; text-align: center; }
+.cell { display: block; }
+#key_text { height: 40mm; width: 60mm; }
+#key_text h1 { font-size: 12pt; font-weight: bold; margin: 1mm; }
+#key_text p { margin: 1mm; }
+#key_value { word-break: break-all }
+#key_qr { height: 40mm; width: 40mm; text-align: right; }
+#key_qr img { height: 100%; width: 100%; }
+#instructions { font-size: 8pt; display: block; margin: 0; }
+#instructions p { margin: 0; }
+</style>
+</head>
+<body>
+<div class="card" id="front">
+    <div class="header">
+        Shamir key share part
+    </div>
+    <div class="content">
+        <div class="cell" id="key_text">
+            <h1>Name:</h1>
+            <p id="key_name">${NAME}</p>
+            <h1>Shamir key share value:</h1>
+            <p id="key_value">${INPUT_KEY}</p>
+        </div>
+        <div class="cell" id="key_qr">
+            <img src="${QR_IMG}" />
+        </div>
+    </div>
+    <div class="footer">
+        Generated by Shamir-iso ( https://aitorpazos.es/shamir-iso )
+    </div>
+</div>
+<hr />
+<div class="card" id="back">
+    <div class="header">
+        Shamir key share instructions
+    </div>
+    <div class="content" id="instructions">
+        <p>
+            The key written on the front of this card is one of the shares of a key divided using Shamir's secret sharing
+            scheme.
+        </p>
+        <p>
+            Important notes:
+        </p>
+        <ul>
+            <li>You can only recover the original key having access to the number of shares defined by the threshold
+            selected when this part was generated.</li>
+            <li>Any combination of the shares that count up to the threshold is able to recover the original key.</li>
+            <li>This is a high value key.</li>
+            <li>It is important that you keep this key in a safe place and protected from unauthorized access.</li>
+        </ul>
+    </div>
+    <div class="footer">
+        Generated by Shamir-iso ( https://aitorpazos.es/shamir-iso )    
+    </div>
+</div>
+</body>
+</html>
+EOHTML
diff --git a/files-xfce/config/packages b/files-xfce/config/packages
@@ -32,3 +32,4 @@ xbitmaps
 xdg-user-dirs 
 xinit
 xterm
+zbar-tools
diff --git a/files-xfce/config/shamir-background.png b/files-xfce/config/shamir-background.png
diff --git a/shamir-background.kra b/shamir-background.kra
-Original file line number
+Diff line change
@@ Expand Up / @@ -18,3 +18,4 @@ xbitmaps @@
     xdg-user-dirs
     xinit
     xterm
+    zbar-tools