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| author | Holger Levsen <holger@layer-acht.org> | 2016-11-24 02:01:54 +0100 |
|---|---|---|
| committer | Holger Levsen <holger@layer-acht.org> | 2016-11-24 02:01:54 +0100 |
| commit | e9fa05b0a068fde0197ea01f2ff31e2513b7965f (patch) | |
| tree | bcea53e8c377b330fb5cda1e1cc47e15c147e1d3 /presentations/2016-11-30-Profitbricks/index.html | |
| parent | 33db20cf1eacb112a71657056e02b984649690d5 (diff) | |
| download | jenkins.debian.net-e9fa05b0a068fde0197ea01f2ff31e2513b7965f.tar.xz | |
copied from git.debian.org/git/reproducible/presentations.git / 2016-11-13-MiniDebConfCambridge there, Copyright & thanks to Chris Lamb
Signed-off-by: Holger Levsen <holger@layer-acht.org>
Diffstat (limited to 'presentations/2016-11-30-Profitbricks/index.html')
| -rw-r--r-- | presentations/2016-11-30-Profitbricks/index.html | 324 |
1 files changed, 324 insertions, 0 deletions
diff --git a/presentations/2016-11-30-Profitbricks/index.html b/presentations/2016-11-30-Profitbricks/index.html new file mode 100644 index 00000000..13d4a448 --- /dev/null +++ b/presentations/2016-11-30-Profitbricks/index.html @@ -0,0 +1,324 @@ +<!doctype html> +<html lang="en"> + +<head> + <meta charset="utf-8"> + <title>Reproducible builds status update</title> + <meta name="apple-mobile-web-app-capable" content="yes"> + <meta name="apple-mobile-web-app-status-bar-style" content="black-translucent"> + + <meta name="viewport" content="width=device-width, initial-scale=1.0, maximum-scale=1.0, user-scalable=no, minimal-ui"> + + <link rel="stylesheet" href="css/reveal.css"> + <link rel="stylesheet" href="css/theme/black.css" id="theme"> + + <style type="text/css"> + li { + margin-top: 28px !important; + } + ul ul li { + margin-top: 16px !important; + } + * { + text-transform: none !important; + } + a { + color: inherit !important; + } + code { + font-size: 90% !important; + } + table { + width: 100%; + } + .reveal table td { + border-bottom: none; + } + .reveal section img { + border: none; + box-shadow: none; + } + </style> + + <!--[if lt IE 9]> + <script src="lib/js/html5shiv.js"></script> + <![endif]--> + + <script> + var link = document.createElement('link'); + link.rel = 'stylesheet'; + link.type = 'text/css'; + link.href = window.location.search.match( /print-pdf/gi ) ? 'css/print/pdf.css' : 'css/print/paper.css'; + document.getElementsByTagName('head')[0].appendChild( link ); +</script> +</head> + +<body> + <div class="reveal"> + <div class="slides" style="text-align: left;"> + <section data-background="images/debian_logo.png" data-background-size="10%" data-background-position="90% 10%"> + <h2>Reproducible builds status update</h2> + <h4> + <br> + Chris Lamb (lamby)<br>Holger Levsen (h01ger) + </h4> + </section> + + <section data-background="images/install.jpg" data-background-size="80%" data-background-color="black"> + <h2>The problem</h2> + <ul> + <li class="fragment">Can inspect the source code of free software for flaws</li> + <li class="fragment">But distributions provide binary/compiled packages</li> + </ul> + </section> + + <section> + <h2>Can we trust this process?</h2> + + <ul> + <li class="fragment">To get users, go after the developers</li> + <li class="fragment">Financial incentives to crack developer machines / build infrastructure</li> + <li class="fragment"><code>CVE-2002-0083</code>: Remote root exploit in OpenSSH (single bit difference in binary)</li> + <li class="fragment">Kernel module modifying source code when "viewed" by GCC only (see <code>media.ccc.de</code>)</li> + <li class="fragment">Compromised Apple iOS SDK, <em>Xcodeghost</em>, etc.</li> + </ul> + </section> + + <section> + <h2 style="line-height: 130%;"> + The motivation behind "reproducible" builds is to allow verification + that no flaws have been introduced during the compilation process. + </h2> + </section> + + <section> + <h2>The solution</h2> + + <ol> + <li class="fragment">Ensure compilation always identical results</li> + <li class="fragment">Multiple parties compare compilation results</li> + <li class="fragment">Attacker needs to infect everybody simultaneously (or they are detected)</li> + </ol> + </section> + + <section> + <h2>Challenges</h2> + <ul> + <ul> + <li class="fragment">Timestamps</li> + <li class="fragment">Timezones & locales</li> + <li class="fragment">Non-deterministic file ordering</li> + <li class="fragment">Dictionary/hash key ordering</li> + <li class="fragment">Users, groups, <code>umask</code>, environment variables</li> + <li class="fragment">Build paths</li> + <li class="fragment">Specifying the environment</li> + </ul> + </ul> + </section> + + <section> + <h2>Technical advantages</h2> + + <ul> + <ul> + <li class="fragment">Faster to build; saves time, money & the environment</li> + <li class="fragment">Easier to test changes/revisions</li> + <li class="fragment">Unsafe behaviour (eg. internet access)</li> + <li class="fragment">Unreliable / non-deterministic behaviours (eg. timing)</li> + <li class="fragment">Finds bugs in uncommon timezones or locales</li> + <li class="fragment">Detect corrupted build environments</li> + <li class="fragment">Find future build failures (eg. expired certificates)</li> + </ul> + </ul> + </section> + + <section data-background="images/debian.jpg" data-background-color="black"> + <h2>Reproducible builds in Debian</h2> + + <p>Continuously build every package twice, varying:</p> + + <ul class="fragment"> + <ul> + <li class="fragment">Time & date</li> + <li class="fragment">Hostname & domain name</li> + <li class="fragment">Filesystem (<code><strike>disorderfs</strike></code>)</li> + <li class="fragment">Timezone & locale</li> + <li class="fragment"><code>uid</code> & <code>gid</code></li> + <li class="fragment">GECOS information, the shell & a bunch of environment variables </li> + <li class="fragment">Kernel & CPU type</li> + <li class="fragment">and more…</li> + </ul> + </ul> + </section> + + <section data-background="images/testing_status.png"> + + </section> + + <section data-background="images/unstable_status.png"> + + </section> + <section data-background="images/stats_bugs_sin_ftbfs_state.png"> + + </section> + + <section> + <h2>Toolchain</h2> + + <ul> + <li>Previously needed to use custom packages</li> + <li>Not needed since dpkg <code>1.18.11</code></li> + </ul> + </section> + + <section> + <h2>Build paths</h2> + + <ul> + <li class="fragment">Many builds embed path they are built from</li> + <li class="fragment">our test setup previously used same build path</li> + <li class="fragment">In unstable, we now vary the build path → lots of unreproducibility</li> + <li class="fragment">Work on general solutions ongoing (eg. <code>SOURCE_PREFIX_MAP</code> for GCC)</li> + </ul> + </section> + + <section> + <h2><code>.buildinfo</code> files (1/2)</h2> + + <ul> + <li class="fragment">Definition of the environment used during a build</li> + <li class="fragment">Specificies: + <ul> + <li>Inputs: <code>.dsc</code>, <code>Build-Depends</code>, build path, etc.</li> + <li>Outputs: <code>.deb</code> checksums, etc.</li> + </ul> + <li class="fragment"><code>dak</code> needs to accept and forward them</li> + <li class="fragment">Will be signed by autobuilders, third-parties, etc.</li> + <li class="fragment">Experimental server at <a href="https://buildinfo.debian.net/">buildinfo.debian.net</a></li> + </ul> + </section> + + <section> + <h2><code>.buildinfo</code> files (2/2)</h2> + + <ul> + <li class="fragment">Outstanding questions: + <ul> + <li class="fragment">Filename scheme</li> + <li class="fragment">Time</li> + <li class="fragment">Environment variables</li> + </ul> + <li class="fragment">How to host 100,000s of files on <code>ftp-master.d.o</code></li> + </ul> + </section> + + <section> + <h2>2016 summit meeting</h2> + + <ul> + <li>Three-day workshop in Berlin, Germany</li> + <li>Follow-up to Athens 2015 event</li> + </ul> + + <br> + <br> + + <p style="text-align: center;"> + <a href="https://reproducible-builds.org/events/berlin2016/"><code>reproducible-builds.org/events/berlin2016/</code></a> + </p> + </section> + + <section> + <h2>Beyond Debian…</h2> + <ul> + <li class="fragment">coreboot, Fedora, LEDE, OpenWRT, NetBSD, FreeBSD, Arch, Qubes, F-Droid, NixOS, Guix, etc.</li> + <li class="fragment">Other projects now using "our" testing framework, <code>SOURCE_DATE_EPOCH</code>, <code>.buildinfo</code> file concept</li> + <li class="fragment">Reproducible Builds summits (Athens, Berlin)</li> + <li class="fragment">Some challenges moving from <code>debian-</code> prefixes, mailing lists, etc.</li> + <li class="fragment">Generic tools</li> + </ul> + </section> + + <section data-background="images/diffoscope.png"> + + </section> + + <section> + <h2>Future work</h2> + + <ul class="fragment"> + <li class="fragment">dak (<code>.buildinfo</code> file support)</li> + <li class="fragment">How to make it meaningful for end-users</li> + <li class="fragment">Source code still vulnerable</li> + </ul> + </section> + + <section> + <h2>Getting involved</h2> + <ul class="fragment"> + <li class="fragment">Check your own packages</li> + <li class="fragment">Visit <a href="https://reproducible-builds.org/"><code>reproducible-builds.org</a></code></li class="fragment"> + <li class="fragment">Stop using dates (or use <tt><a href="https://reproducible-builds.org/specs/">SOURCE_DATE_EPOCH</a></tt>)</li> + <li class="fragment"><code>#reproducible-builds</code> on <code>irc.oftc.net</code></li> + </ul> + </section> + + <section data-background-color="white"> + <p> + <img src="images/cii.png"> + <br> + <img src="images/lf.png"> + <br> + <img src="images/profitbricks.jpg"> + <br> + <img src="images/debian_logo.png"> + </p> + </section> + + <section data-background="images/debian.jpg" data-background-color="black"> + <h2 style="text-align: center;">Questions?</h2> + + <br> + <br> + + <table> + <tr> + <td> + <a href="mailto:lamby@debian.org">lamby@debian.org</a> + </td> + <td style="text-align: right;"> + <code>C2FE 4BD2 71C1 39B8 6C53 3E46 1E95 3E27 D431 1E58</code> + </td> + </tr> + <tr> + <td> + <a href="mailto:holger@debian.org">holger@debian.org</a> + </td> + <td style="text-align: right;"> + <code>B8BF 5413 7B09 D35C F026 FE9D 091A B856 069A AA1C</code> + </td> + </tr> + </table> + + <br> + + <p style="text-align: center;"> + <a href="https://reproducible-builds.org/"><code>reproducible-builds.org</code></a> + <br> + <code>#reproducible-builds</code> on <code>irc.oftc.net</code> + </p> + </section> + </div> + </div> + + <script src="lib/js/head.min.js"></script> + <script src="js/reveal.js"></script> + <script> + Reveal.initialize({ + controls: false, + progress: false, + history: true + }); + </script> +</body> +</html> |