Vorbereitung Base64-Grafik

gefahrgutformular/gefahrgutformular.cls

 \setcounter{errorcontextlines}{100}
 \listfiles
 \NeedsTeXFormat{LaTeX2e}[1999/12/01]
-\ProvidesClass{Gefahrgutformular}
+\ProvidesClass{gefahrgutformular}
     [2019/04/03 v0.1a Gefahrgutformular (RN/PTB)]
 
 \DeclareOption*{\PassOptionsToClass{\CurrentOption}{scrartcl}}
@@ -61,6 +61,8 @@
 \newcommand*\ContactPersonTelephon[1]{\gdef\vl@ContactPersonTelephon{#1}}
 \newcommand*\vl@SignatureGraphic{}
 \newcommand*\SignatureGraphic[1]{\gdef\vl@SignatureGraphic{#1}}
+\newcommand*\vl@SignatureGraphicBaseLXIV{}
+\newcommand*\SignatureGraphicBaseLXIV[1]{\gdef\vl@SignatureGraphicBaseLXIV{#1}}
 \newcommand*\vl@SenderAddress{}
 \newcommand*\SenderAddress[1]{\long\gdef\vl@SenderAddress{#1}}
 \newcommand*\vl@RecipientAddress{}
@@ -167,6 +169,7 @@
         \put(\vl@tempdimc,-17bp){\makebox(0,0)[c]{%
           \includegraphics[height=26bp]{\vl@SignatureGraphic}}}%
       %%% https://ipfs-sec.stackexchange.cloudflare-ipfs.com/tex/A/question/208819.html
+      %%% https://github.com/csachs/luaimageembed
       \fi
       \put(\vl@tempdimc,-45bp){\makebox(0,0)[c]{Unterschrift}}%
     }%

gefahrgutformular/test-gefahrgutformular.tex

@@ -9,7 +9,6 @@
 \Type{Paket}
 \ContactPerson{Ute Becker}
 \ContactPersonTelephon{7467}
-\SignatureGraphic{SIG_Ute_Becker.png}
 \SenderAddress{%
 PTB\\
 AG 7.54\\
@@ -26,6 +25,11 @@ Pfeiffer-vacuum SAS\\
   \item 6 Lecks; Druck \SI{1.5}{\bar}; UN 1046; Helium \dots
   \item 2 Lecks; Druck \SI{1.5}{\bar}; UN 1046; Wasserstoff \dots 
 }
+\SignatureGraphic{SIG_Ute_Becker.png}
+\SignatureGraphicBaseLXIV{%
+iVBORw0KGgoAAAANSUhEUgAAAAMAAAADCAAAAABzQ+pjAAAAFElEQVQI12P4z/Cf4f9/BgYGBgYA
+IOsD/UqPmwUAAAAASUVORK5CYII=
+}
 
 \begin{document}
 \end{document}