merged from the lp:~mvo/apt/mvo branch

[apt.git] / doc / apt-secure.8.xml

diff --git a/doc/apt-secure.8.xml b/doc/apt-secure.8.xml
index f345c3f89ac6286050462aa8a108a424b3e80bfa..8cdfe3ab68a4d5beb68a4c06101f8b0e767ed913 100644 (file)
--- a/doc/apt-secure.8.xml
+++ b/doc/apt-secure.8.xml
@@ -1,6 +1,6 @@
 <?xml version="1.0" encoding="utf-8" standalone="no"?>
 <?xml version="1.0" encoding="utf-8" standalone="no"?>

-<!DOCTYPE refentry PUBLIC "-//OASIS//DTD DocBook XML V4.2//EN"
-  "http://www.oasis-open.org/docbook/xml/4.2/docbookx.dtd" [
+<!DOCTYPE refentry PUBLIC "-//OASIS//DTD DocBook XML V4.5//EN"
+  "http://www.oasis-open.org/docbook/xml/4.5/docbookx.dtd" [

 
 <!ENTITY % aptent SYSTEM "apt.ent">
 %aptent;
 
 <!ENTITY % aptent SYSTEM "apt.ent">
 %aptent;


@@ -11,8 +11,15 @@
 ]>
 
 <refentry>
 ]>
 
 <refentry>

- &apt-docinfo;
- 
+ <refentryinfo>
+   &apt-author.jgunthorpe;
+   &apt-author.team;
+   &apt-email;
+   &apt-product;
+   <!-- The last update date -->
+   <date>2012-06-09T00:00:00Z</date>
+ </refentryinfo>
+

  <refmeta>
    <refentrytitle>apt-secure</refentrytitle>
    <manvolnum>8</manvolnum>
  <refmeta>
    <refentrytitle>apt-secure</refentrytitle>
    <manvolnum>8</manvolnum>


@@ -50,11 +57,11 @@
    </para>
 
    <para>
    </para>
 
    <para>

-   If a package comes from a archive without a signature or with a
-   signature that apt does not have a key for that package is
-   considered untrusted and installing it will result in a big
+   If a package comes from a archive without a signature, or with a
+   signature that apt does not have a key for, that package is
+   considered untrusted, and installing it will result in a big

    warning. <command>apt-get</command> will currently only warn
    warning. <command>apt-get</command> will currently only warn

-   for unsigned archives, future releases might force all sources
+   for unsigned archives; future releases might force all sources

    to be verified before downloading packages from them.
    </para>
 
    to be verified before downloading packages from them.
    </para>
 


@@ -68,11 +75,11 @@
 
    <para> 
    The chain of trust from an apt archive to the end user is made up of
 
    <para> 
    The chain of trust from an apt archive to the end user is made up of

-   different steps. <command>apt-secure</command> is the last step in
-   this chain, trusting an archive does not mean that the packages
-   that you trust it do not contain malicious code but means that you
-   trust the archive maintainer. It's the archive maintainer
-   responsibility to ensure that the archive integrity is correct.
+   several steps. <command>apt-secure</command> is the last step in
+   this chain; trusting an archive does not mean that you trust its
+   packages not to contain malicious code, but means that you
+   trust the archive maintainer. It's the archive maintainer's
+   responsibility to ensure that the archive's integrity is preserved.

    </para>
 
    <para>apt-secure does not review signatures at a
    </para>
 
    <para>apt-secure does not review signatures at a


@@ -83,30 +90,29 @@
 
    <para>
    The chain of trust in Debian starts when a maintainer uploads a new
 
    <para>
    The chain of trust in Debian starts when a maintainer uploads a new

-   package or a new version of a package to the Debian archive. This
-   upload in order to become effective needs to be signed by a key of
-   a maintainer within the Debian maintainer's keyring (available in
-   the debian-keyring package). Maintainer's keys are signed by
+   package or a new version of a package to the Debian archive. In
+   order to become effective, this upload needs to be signed by a key
+   contained in the Debian Maintainers keyring (available in
+   the debian-keyring package). Maintainers' keys are signed by

    other maintainers following pre-established procedures to
    ensure the identity of the key holder.
    </para>
 
    <para>
    Once the uploaded package is verified and included in the archive,
    other maintainers following pre-established procedures to
    ensure the identity of the key holder.
    </para>
 
    <para>
    Once the uploaded package is verified and included in the archive,

-   the maintainer signature is stripped off, an MD5 sum of the package
-   is computed and put in the Packages file. The MD5 sum of all of the
-   packages files are then computed and put into the Release file. The
-   Release file is then signed by the archive key (which is created
-   once a year) and distributed through the FTP server. This key is
-   also on the Debian keyring.
+   the maintainer signature is stripped off, and checksums of the package
+   are computed and put in the Packages file. The checksums of all of the
+   Packages files are then computed and put into the Release file. The
+   Release file is then signed by the archive key for this Debian release,
+   and distributed alongside the packages and the Packages files on
+   Debian mirrors. The keys are in the Debian archive keyring available in
+   the <package>debian-archive-keyring</package> package.

    </para>
 
    <para>
    </para>
 
    <para>

-   Any end user can check the signature of the Release file, extract the MD5
-   sum of a package from it and compare it with the MD5 sum of the
-   package he downloaded. Prior to version 0.6 only the MD5 sum of the
-   downloaded Debian package was checked. Now both the MD5 sum and the
-   signature of the Release file are checked.
+   End users can check the signature of the Release file, extract a checksum
+   of a package from it and compare it with the checksum of the package
+   they downloaded by hand - or rely on APT doing this automatically.

    </para>
 
    <para>Notice that this is distinct from checking signatures on a
    </para>
 
    <para>Notice that this is distinct from checking signatures on a


@@ -115,11 +121,11 @@
 
     <itemizedlist>
        <listitem><para><literal>Network "man in the middle"
 
     <itemizedlist>
        <listitem><para><literal>Network "man in the middle"

-       attacks</literal>. Without signature checking, a malicious
-       agent can introduce himself in the package download process and
+       attacks</literal>. Without signature checking, malicious
+       agents can introduce themselves into the package download process and

        provide malicious software either by controlling a network
        element (router, switch, etc.) or by redirecting traffic to a
        provide malicious software either by controlling a network
        element (router, switch, etc.) or by redirecting traffic to a

-       rogue server (through arp or DNS spoofing
+       rogue server (through ARP or DNS spoofing

        attacks).</para></listitem>
  
        <listitem><para><literal>Mirror network compromise</literal>.
        attacks).</para></listitem>
  
        <listitem><para><literal>Mirror network compromise</literal>.


@@ -138,8 +144,8 @@
  <refsect1><title>User configuration</title>
    <para>
    <command>apt-key</command> is the program that manages the list
  <refsect1><title>User configuration</title>
    <para>
    <command>apt-key</command> is the program that manages the list

-   of keys used by apt. It can be used to add or remove keys although
-   an installation of this release will automatically provide the
+   of keys used by apt. It can be used to add or remove keys, although
+   an installation of this release will automatically contain the

    default Debian archive signing keys used in the Debian package
    repositories.
    </para>
    default Debian archive signing keys used in the Debian package
    repositories.
    </para>


@@ -148,8 +154,8 @@
    (you should make sure you are using a trusted communication channel
    when retrieving it), add it with <command>apt-key</command> and
    then run <command>apt-get update</command> so that apt can download
    (you should make sure you are using a trusted communication channel
    when retrieving it), add it with <command>apt-key</command> and
    then run <command>apt-get update</command> so that apt can download

-   and verify the <filename>Release.gpg</filename> files from the archives you
-   have configured.
+   and verify the <filename>InRelease</filename> or <filename>Release.gpg</filename>
+   files from the archives you have configured.

    </para>
 </refsect1>
 
    </para>
 </refsect1>
 


@@ -166,6 +172,7 @@
        (provided in apt-utils).</para></listitem>
    
       <listitem><para><emphasis>Sign it</emphasis>. You can do this by running
        (provided in apt-utils).</para></listitem>
    
       <listitem><para><emphasis>Sign it</emphasis>. You can do this by running

+      <command>gpg --clearsign -o InRelease Release</command> and

       <command>gpg -abs -o Release.gpg Release</command>.</para></listitem>
 
       <listitem><para><emphasis>Publish the key fingerprint</emphasis>,
       <command>gpg -abs -o Release.gpg Release</command>.</para></listitem>
 
       <listitem><para><emphasis>Publish the key fingerprint</emphasis>,


@@ -175,9 +182,9 @@
 
     </itemizedlist>
 
 
     </itemizedlist>
 

-    <para>Whenever the contents of the archive changes (new packages
+    <para>Whenever the contents of the archive change (new packages

     are added or removed) the archive maintainer has to follow the
     are added or removed) the archive maintainer has to follow the

-    first two steps previously outlined.</para>
+    first two steps outlined above.</para>

 
 </refsect1>
 
 
 </refsect1>
 


@@ -189,7 +196,7 @@
 
 <para>For more background information you might want to review the
 <ulink
 
 <para>For more background information you might want to review the
 <ulink

-url="http://www.debian.org/doc/manuals/securing-debian-howto/ch7.en.html">Debian
+url="http://www.debian.org/doc/manuals/securing-debian-howto/ch7">Debian

 Security Infrastructure</ulink> chapter of the Securing Debian Manual
 (available also in the harden-doc package) and the
 <ulink url="http://www.cryptnet.net/fdp/crypto/strong_distro.html"
 Security Infrastructure</ulink> chapter of the Securing Debian Manual
 (available also in the harden-doc package) and the
 <ulink url="http://www.cryptnet.net/fdp/crypto/strong_distro.html"