source: general/genlib/libssh2.xml@ 273bb5a

<?xml version="1.0" encoding="UTF-8"?>
<!DOCTYPE sect1 PUBLIC "-//OASIS//DTD DocBook XML V4.5//EN"
   "http://www.oasis-open.org/docbook/xml/4.5/docbookx.dtd" [
  <!ENTITY % general-entities SYSTEM "../../general.ent">
  %general-entities;

  <!ENTITY libssh2-download-http "https://www.libssh2.org/download/libssh2-&libssh2-version;.tar.gz">
  <!ENTITY libssh2-download-ftp  " ">
  <!ENTITY libssh2-md5sum        "a01d543fd891ca48fe47726540d50b17">
  <!ENTITY libssh2-size          "1.1 MB">
  <!ENTITY libssh2-buildsize     "13 MB (with tests)">
  <!ENTITY libssh2-time          "0.2 SBU (with tests)">
]>

<sect1 id="libssh2" xreflabel="libssh2-&libssh2-version;">
  <?dbhtml filename="libssh2.html"?>


  <title>libssh2-&libssh2-version;</title>

  <indexterm zone="libssh2">
    <primary sortas="a-libssh2">libssh2</primary>
  </indexterm>

  <sect2 role="package">
    <title>Introduction to libssh2</title>

    <para>
      <application>Libssh2</application> package is a client-side C library
      implementing the SSH2 protocol.
    </para>

    &lfs121_checked;

    <bridgehead renderas="sect3">Package Information</bridgehead>
    <itemizedlist spacing="compact">
      <listitem>
        <para>
          Download (HTTP): <ulink url="&libssh2-download-http;"/>
        </para>
      </listitem>
      <listitem>
        <para>
          Download (FTP): <ulink url="&libssh2-download-ftp;"/>
        </para>
      </listitem>
      <listitem>
        <para>
          Download MD5 sum: &libssh2-md5sum;
        </para>
      </listitem>
      <listitem>
        <para>
          Download size: &libssh2-size;
        </para>
      </listitem>
      <listitem>
        <para>
          Estimated disk space required: &libssh2-buildsize;
        </para>
      </listitem>
      <listitem>
        <para>
          Estimated build time: &libssh2-time;
        </para>
      </listitem>
    </itemizedlist>


    <bridgehead renderas="sect3">Additional Downloads</bridgehead>
    <itemizedlist spacing="compact">
      <listitem>
        <para>
          Required patch:
          <ulink url="&patch-root;/libssh2-&libssh2-version;-security_fixes-1.patch"/>
        </para>
      </listitem>
    </itemizedlist>

    <bridgehead renderas="sect3">libssh2 Dependencies</bridgehead>

    <bridgehead renderas="sect4">Optional</bridgehead>
    <para role="optional">
      <xref linkend="cmake"/> (can be used instead of the
      <command>configure</command> script),
      <xref linkend="libgcrypt"/> (can be used instead of OpenSSL),
      <xref linkend="openssh"/> (for some tests), and
      <ulink url='https://www.docker.com'>Docker</ulink> (for some tests)
    </para>

  </sect2>

  <sect2 role="installation">
    <title>Installation of libssh2</title>

    <para>
      <!-- the Terrapin attack -->
      First, fix a critical security vulnerability in libssh2:
    </para>

<screen><userinput remap="pre">patch -Np1 -i ../libssh2-&libssh2-version;-security_fixes-1.patch</userinput></screen>

    <para>
      If you want to test the package, exclude the tests requiring a static
      library, and remove the reference to an insecure algorithm removed
      since OpenSSH 9.8:
    </para>

<screen><userinput>sed -E '/^DOCKER_TEST/,/^SSHD_TEST/s/test_(auth_keyboard_info.* |hostkey |simple)/$(NOTHING)/' \
    -i tests/Makefile.inc &amp;&amp;
autoreconf -fi &amp;&amp;
sed 's/ssh-dss,//' -i tests/openssh_server/sshd_config</userinput></screen>

    <para>
      Install <application>libssh2</application> by running the following
      commands:
    </para>

<screen><userinput>./configure --prefix=/usr          \
            --disable-docker-tests \
            --disable-static       &amp;&amp;
make</userinput></screen>

    <para>
      To test the results, issue: <command>make check</command>.
    </para>

    <para>
      Now, as the <systemitem class="username">root</systemitem> user:
    </para>

<screen role="root"><userinput>make install</userinput></screen>
  </sect2>

  <sect2 role="commands">
    <title>Command Explanations</title>

    <para>
      <parameter>--disable-docker-tests</parameter>: Disable the tests
      requiring Docker, which is beyond the scope of BLFS.  Remove this
      switch if you've installed Docker and you wish to run the test suite.
    </para>

    <xi:include xmlns:xi="http://www.w3.org/2001/XInclude"
      href="../../xincludes/static-libraries.xml"/>

  </sect2>

  <sect2 role="content">
    <title>Contents</title>

    <segmentedlist>
      <segtitle>Installed Programs</segtitle>
      <segtitle>Installed Library</segtitle>
      <segtitle>Installed Directories</segtitle>

      <seglistitem>
        <seg>
          None
        </seg>
        <seg>
          libssh2.so
        </seg>
        <seg>
          None
        </seg>
      </seglistitem>
    </segmentedlist>

    <variablelist>
      <bridgehead renderas="sect3">Short Descriptions</bridgehead>
      <?dbfo list-presentation="list"?>
      <?dbhtml list-presentation="table"?>

      <varlistentry id="libssh2-lib">
        <term><filename class="libraryfile">libssh2.so</filename></term>
        <listitem>
          <para>
            contains functions to use the SSH2 protocol
          </para>
          <indexterm zone="libssh2 libssh2-lib">
            <primary sortas="c-libssh2">libssh2.so</primary>
          </indexterm>
        </listitem>
      </varlistentry>
    </variablelist>
  </sect2>

</sect1>