\documentclass[10pt,a4paper]{article}

% Packages
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\usepackage{multicol}           % Allows multicols in tables
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\usepackage{tabulary}           % Used in header and footer
\usepackage{hhline}             % Border under tables
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\usepackage{setspace}           % For line height
\usepackage{lastpage}           % Needed for total page number
\usepackage{seqsplit}           % Splits long words.
%\usepackage{opensans}          % Can't make this work so far. Shame. Would be lovely.
\usepackage[normalem]{ulem}     % For underlining links
% Most of the following are not required for the majority
% of cheat sheets but are needed for some symbol support.
\usepackage{amsmath}            % Symbols
\usepackage{MnSymbol}           % Symbols
\usepackage{wasysym}            % Symbols
%\usepackage[english,german,french,spanish,italian]{babel}              % Languages

% Document Info
\author{mdoehle}
\pdfinfo{
  /Title (pki-openssl.pdf)
  /Creator (Cheatography)
  /Author (mdoehle)
  /Subject (PKI / openSSL Cheat Sheet)
}

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% the right line height in the tables
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% Commands
\newcommand{\SetRowColor}[1]{\noalign{\gdef\RowColorName{#1}}\rowcolor{\RowColorName}} % Shortcut for row colour
\newcommand{\mymulticolumn}[3]{\multicolumn{#1}{>{\columncolor{\RowColorName}}#2}{#3}} % For coloured multi-cols
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\renewcommand{\familydefault}{\sfdefault}
\color{TextColor}

% Header and Footer
\pagestyle{fancy}
\fancyhead{} % Set header to blank
\fancyfoot{} % Set footer to blank
\fancyhead[L]{
\noindent
\begin{multicols}{3}
\begin{tabulary}{5.8cm}{C}
    \SetRowColor{DarkBackground}
    \vspace{-7pt}
    {\parbox{\dimexpr\textwidth-2\fboxsep\relax}{\noindent
        \hspace*{-6pt}\includegraphics[width=5.8cm]{/web/www.cheatography.com/public/images/cheatography_logo.pdf}}
    }
\end{tabulary}
\columnbreak
\begin{tabulary}{11cm}{L}
    \vspace{-2pt}\large{\bf{\textcolor{DarkBackground}{\textrm{PKI / openSSL Cheat Sheet}}}} \\
    \normalsize{by \textcolor{DarkBackground}{mdoehle} via \textcolor{DarkBackground}{\uline{cheatography.com/23234/cs/5082/}}}
\end{tabulary}
\end{multicols}}

\fancyfoot[L]{ \footnotesize
\noindent
\begin{multicols}{3}
\begin{tabulary}{5.8cm}{LL}
  \SetRowColor{FootBackground}
  \mymulticolumn{2}{p{5.377cm}}{\bf\textcolor{white}{Cheatographer}}  \\
  \vspace{-2pt}mdoehle \\
  \uline{cheatography.com/mdoehle} \\
  \end{tabulary}
\vfill
\columnbreak
\begin{tabulary}{5.8cm}{L}
  \SetRowColor{FootBackground}
  \mymulticolumn{1}{p{5.377cm}}{\bf\textcolor{white}{Cheat Sheet}}  \\
   \vspace{-2pt}Published 31st August, 2015.\\
   Updated 11th May, 2016.\\
   Page {\thepage} of \pageref{LastPage}.
\end{tabulary}
\vfill
\columnbreak
\begin{tabulary}{5.8cm}{L}
  \SetRowColor{FootBackground}
  \mymulticolumn{1}{p{5.377cm}}{\bf\textcolor{white}{Sponsor}}  \\
  \SetRowColor{white}
  \vspace{-5pt}
  %\includegraphics[width=48px,height=48px]{dave.jpeg}
  Measure your website readability!\\
  www.readability-score.com
\end{tabulary}
\end{multicols}}




\begin{document}
\raggedright
\raggedcolumns

% Set font size to small. Switch to any value
% from this page to resize cheat sheet text:
% www.emerson.emory.edu/services/latex/latex_169.html
\footnotesize % Small font.

\begin{multicols*}{2}

\begin{tabularx}{8.4cm}{X}
\SetRowColor{DarkBackground}
\mymulticolumn{1}{x{8.4cm}}{\bf\textcolor{white}{Certificate Signing Request (CSR)}}  \tn
\SetRowColor{white}
\mymulticolumn{1}{x{8.4cm}}{{\bf{Generate a new private key and Certificate Signing Request}} \newline % Row Count 2 (+ 2)
  `openssl req -out CSR.csr -new -newkey rsa:2048 -nodes -sha256 -keyout privateKey.key` \newline % Row Count 4 (+ 2)
{\bf{Generate a self-signed certificate}} \newline % Row Count 5 (+ 1)
  `openssl req -x509 -sha256 -nodes -days 365 -newkey rsa:2048 -keyout privateKey.key -out certificate.crt` \newline % Row Count 8 (+ 3)
{\bf{Generate a certificate signing request (CSR) for an existing private key}} \newline % Row Count 10 (+ 2)
  `openssl req -out CSR.csr -key privateKey.key -new` \newline % Row Count 12 (+ 2)
{\bf{Generate a certificate signing request based on an existing certificate}} \newline % Row Count 14 (+ 2)
  `openssl x509 -x509toreq -in certificate.crt -out CSR.csr -signkey privateKey.key` \newline % Row Count 16 (+ 2)
{\bf{Remove a passphrase from a private key}} \newline % Row Count 17 (+ 1)
  `openssl rsa -in privateKey.pem -out newPrivateKey.pem`% Row Count 19 (+ 2)
} \tn 
\hhline{>{\arrayrulecolor{DarkBackground}}-}
\end{tabularx}
\par\addvspace{1.3em}

\begin{tabularx}{8.4cm}{X}
\SetRowColor{DarkBackground}
\mymulticolumn{1}{x{8.4cm}}{\bf\textcolor{white}{Check Files}}  \tn
\SetRowColor{white}
\mymulticolumn{1}{x{8.4cm}}{{\bf{Check a Certificate Signing Request (CSR)}} \newline % Row Count 1 (+ 1)
  `openssl req -text -noout -verify -in CSR.csr` \newline % Row Count 2 (+ 1)
{\bf{Check a private key}} \newline % Row Count 3 (+ 1)
  `openssl rsa -in privateKey.key -check` \newline % Row Count 4 (+ 1)
{\bf{Check a certificate}} \newline % Row Count 5 (+ 1)
  `openssl x509 -in certificate.crt -text -noout` \newline % Row Count 6 (+ 1)
{\bf{Check a PKCS\#12 file (.pfx or .p12)}} \newline % Row Count 7 (+ 1)
  `openssl pkcs12 -info -in keyStore.p12`% Row Count 8 (+ 1)
} \tn 
\hhline{>{\arrayrulecolor{DarkBackground}}-}
\end{tabularx}
\par\addvspace{1.3em}

\begin{tabularx}{8.4cm}{X}
\SetRowColor{DarkBackground}
\mymulticolumn{1}{x{8.4cm}}{\bf\textcolor{white}{Debugging}}  \tn
\SetRowColor{white}
\mymulticolumn{1}{x{8.4cm}}{{\bf{Print certificate}} \newline % Row Count 1 (+ 1)
`openssl x509 -noout -text -in certificate.crt` \newline % Row Count 2 (+ 1)
{\bf{Check an SSL connection. All the certificates (including Intermediates) should be displayed}} \newline % Row Count 4 (+ 2)
`openssl s\_client -connect www.paypal.com:443`% Row Count 5 (+ 1)
} \tn 
\hhline{>{\arrayrulecolor{DarkBackground}}-}
\end{tabularx}
\par\addvspace{1.3em}

\begin{tabularx}{8.4cm}{X}
\SetRowColor{DarkBackground}
\mymulticolumn{1}{x{8.4cm}}{\bf\textcolor{white}{Remove Passphrase}}  \tn
\SetRowColor{white}
\mymulticolumn{1}{x{8.4cm}}{{\bf{Convert a PKCS\#12 file (.pfx .p12) containing a private key and certificates to PEM}} \newline % Row Count 2 (+ 2)
`openssl pkcs12 -in keyStore.p12 -out keyStore.pem -nodes` \newline % Row Count 4 (+ 2)
{\bf{Remove Passphrase from key-file}} \newline % Row Count 5 (+ 1)
`openssl rsa -in example.key -out example.nocrypt.key`% Row Count 7 (+ 2)
} \tn 
\hhline{>{\arrayrulecolor{DarkBackground}}-}
\end{tabularx}
\par\addvspace{1.3em}

\begin{tabularx}{8.4cm}{X}
\SetRowColor{DarkBackground}
\mymulticolumn{1}{x{8.4cm}}{\bf\textcolor{white}{Performance}}  \tn
\SetRowColor{white}
\mymulticolumn{1}{x{8.4cm}}{{\bf{Check the SSL performance}} \newline % Row Count 1 (+ 1)
`openssl speed sha1` \newline % Row Count 2 (+ 1)
`openssl speed aes-256-cbc` \newline % Row Count 3 (+ 1)
`openssl speed -evp aes-256-cbc`% Row Count 4 (+ 1)
} \tn 
\hhline{>{\arrayrulecolor{DarkBackground}}-}
\end{tabularx}
\par\addvspace{1.3em}

\begin{tabularx}{8.4cm}{X}
\SetRowColor{DarkBackground}
\mymulticolumn{1}{x{8.4cm}}{\bf\textcolor{white}{How to get a A+ at SSL-Labs}}  \tn
\SetRowColor{white}
\mymulticolumn{1}{x{8.4cm}}{{\bf{Check versions}} \newline % Row Count 1 (+ 1)
`\# openssl version` \newline % Row Count 2 (+ 1)
`OpenSSL 1.0.1e 11 Feb 2013` \newline % Row Count 3 (+ 1)
`\# apache2 -v` \newline % Row Count 4 (+ 1)
`Server version: Apache/2.2.22 (Debian)` \newline % Row Count 5 (+ 1)
`Server built:   Aug 18 2015 09:50:52` \newline % Row Count 6 (+ 1)
{\bf{Enable mods}} \newline % Row Count 7 (+ 1)
`a2enmod ssl` \newline % Row Count 8 (+ 1)
`a2enmod headers` \newline % Row Count 9 (+ 1)
`a2enmod setenvif` \newline % Row Count 10 (+ 1)
{\bf{Configure virtual host}} \newline % Row Count 11 (+ 1)
`   SSLEngine on` \newline % Row Count 12 (+ 1)
` ` \newline % Row Count 13 (+ 1)
`    SSLHonorCipherOrder On` \newline % Row Count 14 (+ 1)
`    SSLCipherSuite \seqsplit{ECDHE-RSA-AES128-GCM-SHA256:ECDHE-ECDSA-AES128-GCM-SHA256:ECDHE-RSA-AES256-GCM-SHA384:ECDHE-ECDSA-AES256-GCM-SHA384:DHE-DSS-AES128-GCM-SHA256:kEDH+AESGCM:ECDHE-RSA-AES128-SHA256:ECDHE-E`} \newline % Row Count 19 (+ 5)
`    SSLProtocol -ALL +TLSv1 +TLSv1.1 +TLSv1.2` \newline % Row Count 20 (+ 1)
`    SSLCertificateFile      \seqsplit{/etc/ssl/www.example.com.pem`} \newline % Row Count 22 (+ 2)
`    SSLCertificateKeyFile   \seqsplit{/etc/ssl/www.example.com.key`} \newline % Row Count 24 (+ 2)
`    SSLCertificateChainFile /etc/ssl/chain.pem` \newline % Row Count 25 (+ 1)
` ` \newline % Row Count 26 (+ 1)
`    SSLStrictSNIVHostCheck On` \newline % Row Count 27 (+ 1)
` ` \newline % Row Count 28 (+ 1)
`    Header always set \seqsplit{Strict-Transport-Security} "max-age=63072000; includeSubdomains; preload"` \newline % Row Count 30 (+ 2)
} \tn 
\end{tabularx}
\par\addvspace{1.3em}

\vfill
\columnbreak
\begin{tabularx}{8.4cm}{X}
\SetRowColor{DarkBackground}
\mymulticolumn{1}{x{8.4cm}}{\bf\textcolor{white}{How to get a A+ at SSL-Labs (cont)}}  \tn
\SetRowColor{white}
\mymulticolumn{1}{x{8.4cm}}{` ` \newline % Row Count 1 (+ 1)
`    \textless{}FilesMatch "\textbackslash{}.(cgi|shtml|phtml|php)\$"\textgreater{}` \newline % Row Count 2 (+ 1)
`        SSLOptions +StdEnvVars` \newline % Row Count 3 (+ 1)
`    \textless{}/FilesMatch\textgreater{}` \newline % Row Count 4 (+ 1)
`    \textless{}Directory /usr/lib/cgi-bin\textgreater{}` \newline % Row Count 5 (+ 1)
`        SSLOptions +StdEnvVars` \newline % Row Count 6 (+ 1)
`    \textless{}/Directory\textgreater{}` \newline % Row Count 7 (+ 1)
` ` \newline % Row Count 8 (+ 1)
`    BrowserMatch "MSIE {[}2-6{]}" \textbackslash{}  ` \newline % Row Count 9 (+ 1)
`        nokeepalive ssl-unclean-shutdown \textbackslash{}  ` \newline % Row Count 10 (+ 1)
`        downgrade-1.0 force-response-1.0` \newline % Row Count 11 (+ 1)
`    \# MSIE 7 and newer should be able to use keepalive` \newline % Row Count 13 (+ 2)
`    BrowserMatch "MSIE {[}17-9{]}" ssl-unclean-shutdown`% Row Count 15 (+ 2)
} \tn 
\hhline{>{\arrayrulecolor{DarkBackground}}-}
\end{tabularx}
\par\addvspace{1.3em}


% That's all folks
\end{multicols*}

\end{document}