source: general/genlib/openssl.xml@ 52d29f7

<?xml version="1.0" encoding="ISO-8859-1"?>
<!DOCTYPE sect1 PUBLIC "-//OASIS//DTD DocBook XML V4.3//EN"
   "http://www.oasis-open.org/docbook/xml/4.3/docbookx.dtd" [
  <!ENTITY % general-entities SYSTEM "../../general.ent">
  %general-entities;


<!ENTITY openssl-download-http "http://www.openssl.org/source/openssl-&openssl-version;.tar.gz">
<!ENTITY openssl-download-ftp "ftp://ftp.openssl.org/source/openssl-&openssl-version;.tar.gz">
<!ENTITY openssl-size "2.7 MB">
<!ENTITY openssl-buildsize "25 MB">
<!ENTITY openssl-time "1.16 SBU">

]>


<sect1 id="openssl" xreflabel="OpenSSL-&openssl-version;">
<?dbhtml filename="openssl.html"?>
<title>OpenSSL-&openssl-version;</title>


<sect2>
<title>Introduction to <application>OpenSSL</application></title>
                                                                                
<para>The <application>OpenSSL</application> package contains management tools
and libraries relating to cryptography.  These are useful for providing
cryptography functions to other packages, notably <application>OpenSSH
</application> and web browsers (for accessing secure https sites).</para>
                                                                                
<sect3><title>Package information</title>
<itemizedlist spacing='compact'>
<listitem><para>Download (HTTP): <ulink url="&openssl-download-http;"/></para></listitem>
<listitem><para>Download (FTP): <ulink url="&openssl-download-ftp;"/></para></listitem>
<listitem><para>Download size: &openssl-size;</para></listitem>
<listitem><para>Estimated Disk space required: &openssl-buildsize;</para></listitem>
<listitem><para>Estimated build time: &openssl-time;</para></listitem></itemizedlist>
</sect3>
</sect2>

<sect2>
<title>Installation of <application>OpenSSL</application></title>
                                                                                
<para>Install <application>OpenSSL</application> by running the following commands:</para>

<screen><userinput><command>sed 's/^passwd/openssl-passwd/' doc/apps/passwd.pod \
    > doc/apps/openssl-passwd.pod &amp;&amp;
rm doc/apps/passwd.pod &amp;&amp;
mv doc/crypto/{,openssl_}threads.pod &amp;&amp;
sed -i -e 's/-m486/-march=i486/' Configure &amp;&amp;
./config --openssldir=/etc/ssl --prefix=/usr shared &amp;&amp;
make MANDIR=/usr/share/man &amp;&amp;
make MANDIR=/usr/share/man install &amp;&amp;
cp -r certs /etc/ssl &amp;&amp;
rmdir /etc/ssl/lib</command></userinput></screen>
                                                                                
</sect2>

<sect2>
<title>Command explanations</title>
                                                                                
<para><option>no-rc5 no-idea</option>: When added to the
<command>./config</command> command, this will eliminate the building of those
encryption methods. Patent licenses may be needed for you to utilize either of
those methods in your projects.</para>
                                                                                
<para><command>rm doc/apps/passwd.pod</command>: This command prevents
<application>Open<acronym>SSL</acronym></application> from installing its
passwd man page over an existing man page with the same name.</para>
                                                                                
<para><command>mv doc/crypto/{,openssl_}threads.pod</command>: This
commands prevents <application>Open<acronym>SSL</acronym></application> from
overwriting an existing man page from <application>Perl</application>.</para>
                                                                                
<para><command>sed -i -e 's/-m486/-march=i486/' Configure</command>:
<application>GCC</application> issues a warning on every
compilation because the <command>Configure</command>
command uses deprecated <parameter>-m486</parameter> instead of
<parameter>-march=i486</parameter>.</para>

<para><screen><command>make MANDIR=/usr/share/man
make MANDIR=/usr/share/man install</command></screen> These
commands install <application>OpenSSL</application> with the man pages
in <filename class='directory'>/usr/share/man</filename> instead of the
default which is <filename class='directory'>/etc/ssl/man</filename>.</para>
                                                                                
<para><command>cp -r certs /etc/ssl</command>: The certificates
must be copied manually since the install script
skips this step.</para>
                                                                                
<para><command>rmdir /etc/ssl/lib</command>: This is simply a tidy-up command.
For some reason, the <application>openssl</application> install routine creates
the <filename class='directory'>/etc/ssl/lib</filename> directory even though
the libraries have been installed in
<filename class='directory'>/usr/lib</filename>.  We remove it to keep things
nice and tidy!</para>
                                                                                
</sect2>

<sect2>
<title>Configuring <application>OpenSSL</application></title>
                                                                                
<sect3><title>Config files</title>
<para><filename>/etc/ssl/openssl.cnf</filename></para>
</sect3>
                                                                                
<sect3><title>Configuration Information</title>
                                                                                
<para>Most people who just want to use
<application>openssl</application> for providing functions
to other programs such as <application>OpenSSH</application> and web browsers won't need to worry
about configuring <application>OpenSSL</application>.  Configuring
<application>OpenSSL</application> is an advanced topic and
so those who do would normally be expected to either know how to do it
or to be able to find out how to do it.</para>
</sect3>
                                                                                
</sect2>

<sect2>
<title>Contents</title>
                                                                                
<para>The <application>Open<acronym>SSL</acronym></application> package contains <command>
c_rehash</command>, <command>openssl</command>, <filename
class='libraryfile'>libcrypto</filename> libraries and <filename
class='libraryfile'>libssl</filename> libraries.</para>
                                                                                
</sect2>
                                                                                
<sect2><title>Description</title>
                                                                                
<sect3><title>c_rehash</title>
                                                                                
<para><command>c_rehash</command> is a <application>Perl</application> script
that scans all files in a directory and adds symbolic links to their hash
values.</para>
                                                                                
</sect3>

<sect3><title>openssl</title>
                                                                                
<para>The <command>openssl</command> program is a command-line tool for using
the various cryptography functions of
<application>Open<acronym>SSL</acronym></application>'s
crypto library from the shell. It can be used for various functions which are
documented in <command>man 1 openssl</command>.</para>
                                                                                
</sect3>
                                                                                
<sect3><title>libcrypto</title>
                                                                                
<para>The <application>Open<acronym>SSL</acronym></application> crypto library implements a wide
range of cryptographic  algorithms used in various Internet standards. The
services provided by  this library are used by the
<application>Open<acronym>SSL</acronym>
</application> implementations of <acronym>SSL</acronym>, <acronym>TLS
</acronym> and <acronym>S/MIME</acronym>, and they have also been used to
implement <application>Open<acronym>SSH</acronym></application>,
<application>Open<acronym>PGP</acronym>
</application>, and other cryptographic standards.</para>
                                                                                
</sect3>
                                                                                
<sect3><title>libssl</title>
                                                                                
<para>The <application>Open<acronym>SSL</acronym></application> <acronym>SSL</acronym> library
implements the Secure Sockets Layer (<acronym>SSL</acronym> v2/v3) and
Transport Layer Security (<acronym>TLS</acronym> v1) protocols. It provides a
rich <acronym>API</acronym>, documentation on which can be found by running
<command>man 3 ssl</command>.</para>
                                                                                
</sect3>
                                                                                
</sect2>

</sect1>