<html><head><meta http-equiv="Content-Type" content="text/html; charset=utf-8"></head><body style="word-wrap: break-word; -webkit-nbsp-mode: space; line-break: after-white-space;" class=""><div class=""><br class=""></div>Wow, that was a lot more complex than I anticipated (in particular, making vehicleid’s unique per owner, not globally unique). 3,000 monolithic lines to 4,000 structured lines. Code has been committed to GitHub, and is running live on <a href="http://api.openvehicles.com" class="">api.openvehicles.com</a> now.<div class=""><br class=""></div><div class="">Warning: There may (will) be bugs. If killed all the obvious ones, but running live is still showing up some edge cases. I don’t recommend anybody else runs this in production yet (particularly as rolling back would be non-trivial, as a result of the database changes).</div><div class=""><br class=""></div><div class="">Major changes include:</div><div class=""><br class=""></div><div class=""><ol class="MailOutline"><li class="">Complete restructuring, to be plugin based. This allows optional functionality to be installed (for example, if you don’t require drupal integration don’t enable that plugin), as well as new plugins to be developed. The list of plugins I am using on my production server are: <span style="caret-color: rgb(0, 0, 0); color: rgb(0, 0, 0);" class="">VECE, DbDBI, AuthDrupal, ApiV2, Push, PushAPNS, PushGCM, PushMAIL, ApiHttp, ApiHttpCore, and ApiHttpMqapi.<br class=""><br class=""></span></li><li class=""><font color="#000000" class=""><span style="caret-color: rgb(0, 0, 0);" class="">The system is designed to be installed and run from a github clone. Just clone the server repository, change directory to v3/server, configure and run appropriately. The .gitignore file allows changes to be made to the configuration without affecting the master github.<br class=""></span></font><br class=""></li><li class="">Database format upgrades. See server/ovms_server_v2_to_v2.sql for the schema changes. If upgrading, you must deploy these database changes (just ’source’ the script in the mysql console). The upgrade may take a while (in particular, the last stage for historical data).<br class=""><br class=""></li><li class="">The database no longer requires vehicle IDs to be globally unique. However, there are some caveats:<br class=""><br class=""></li><ul class=""><li class="">The v2 crypto 0x30 scheme only sends the vehicle ID, not the owner’s username (so if there are two vehicles in the database with the same vehicle ID, we don’t know which one is the correct one). If you use that scheme (as everything does nowadays), vehicle ID still needs to be globally unique for you. For this reason, my Drupal vehicle plugin still checks and enforces unique IDs. The 0x30 login system won’t allow you to login to a vehicle who’s ID has more than one owner. Going forward, as we move away from 0x30 and ’server password’, this will become less of an issue.<br class=""><br class=""></li><li class="">The new v3 crypto 0x31 scheme sends username as well as vehicle ID, so supports per-user vehicle IDs.<br class=""><br class=""></li><li class="">The HTTP API sends username, so supports per-user vehicle IDs.<br class=""><br class=""></li><li class="">Perhaps we should move to ‘VIN’ as vehicle ID?<br class=""><br class=""></li></ul><li class="">The new crypto scheme 0x31 is much simpler to use, and script. Preferable, IMHO - but requires SSL/TLS for protection.<br class=""><br class=""></li><li class="">I’ve added support for API tokens, and love how they have turned out. I recommend this as the best approach going forward. Each token belongs to a particular owner, and has privilege rights associated with it. Tokens can be created and revoked by the owner. It is much easier to see which application (or car) has access to what. For example, the car module can ask for username+password, use that to obtain a token, store it locally and use that for authentication going forward (with no need to store the server password at all).<br class=""><br class=""></li><li class="">Plugin authentication works well. Extend with new mechanisms as required. The ‘Authenticate’ plugin callback is merely passed username+password and returns the permissions granted.<br class=""><br class=""></li><li class="">Push notifications are nicely modular and extendable. Already supports APNS, GCM, and MAIL.<br class=""><br class=""></li><li class="">I’ve called it v3, because this architecture will be able to cooperate with MQTT (for things like HTTP API, authentication, historical data, push notifications, etc).</li></ol></div><div class=""><div><div><br class=""></div><div>Still todo:</div><div><br class=""></div><div><ul class="MailOutline"><li class="">An option for automatic vehicle registration (easy).<br class=""><br class=""></li><li class="">Improvements to the token allocation API (in particular to retrieve existing tokens for specific application usage such as car modules).<br class=""><br class=""></li><li class="">A few miscellaneous functions not often used.<br class=""><br class=""></li><li class="">Documentation. I’ve documented the API changes (both v2 protocol for 0x31, and HTTP API extensions for authentication options and api tokens), but still to document installation and configuration instructions for the server itself.<br class=""><br class=""></li><li class="">Administrator access. Still deciding the best way to handle this. Perhaps ’administrative api tokens’.<br class=""><br class=""></li><li class="">Permissions and Rights. The core is there, but need to extend to everything and document what rights are used for what. This is only relevant for api tokens anyway (as the other two authentication methods grant ‘*’ rights anyway).</li></ul></div><div><br class=""></div><div>Final warning: Please don’t deploy this in productions systems yet. Changes are massive.</div><div><br class=""></div><div>Regards, Mark.</div><div><br class=""></div><blockquote type="cite" class=""><div class="">On 28 Feb 2020, at 3:47 PM, Mark Webb-Johnson <<a href="mailto:mark@webb-johnson.net" class="">mark@webb-johnson.net</a>> wrote:</div><br class="Apple-interchange-newline"><div class=""><meta http-equiv="Content-Type" content="text/html; charset=utf-8" class=""><div style="word-wrap: break-word; -webkit-nbsp-mode: space; line-break: after-white-space;" class=""><div class=""><br class=""></div>The new framework is running now on my development bench, and seems good. It was a major re-structuring, so I’ve upped the version to 3.0 (particularly as this is going to end up connecting to MQTT for HTTP API, database logging, push notifications, authentication, etc). I should finish my testing this weekend, then bring it up on <a href="http://api.openvehicles.com/" class="">api.openvehicles.com</a>. Others should migrate to it with care.<div class=""><br class=""></div><div class="">Regarding the authentication, I have almost finished implementing:</div><div class=""><br class=""></div><div class=""><ul class="MailOutline"><li class="">An Auth Token facility (with authtokens stored against an associated owner ID).</li><ul class=""><li class="">The HTTP API (using username+password authentication) can be used to issue new tokens, as well as enquire on the tokens already issued.</li><li class="">The HTTP API can be used to enumerate registered vehicles, and otherwise maintain them.</li><li class="">The drupal website extension will be extended to also allow viewing and maintenance of tokens.</li><li class="">An authentication token is:</li><ul class=""><li class="">Owner ID (so zero or more tokens belong to this owner)</li><li class="">Token issued by the server on request (the token itself, unique, and the primary key)</li><li class="">Usage identifier (identifying the car module, app id, etc)</li><li class="">Usage description (a textual description of the usage)</li><li class="">Permissions (a permission string identifying what the token can be used for)</li><li class="">Created date+time</li><li class="">Updated date+time</li></ul><li class="">Requests for a new token are passed the usage identifier and description as parameters, and authenticated by username+password.</li><ul class=""><li class="">If a token already exists for that usage identifier, then the description is simply updated (along with updated date+time) and the token returned.</li><li class="">If no token exists, a random one is created and returned (along with usage identifier, description, created and updated date+times).<br class=""><br class=""></li></ul></ul><li class="">An extension to MQTT authentication API to allow authentication either by username+password, or username+authtoken.<br class=""><br class=""></li><li class="">An extension to the HTTP API to allow authentication by username+token, in addition to the existing username+password.<br class=""><br class=""></li><li class="">An extension to the V2 API to allow authentication by username+password or username+authtoken, in addition to the existing vehicled+serverpassword (crypto scheme 0x31).<br class=""><br class=""></li><li class="">An extension to the V2 API to allow for optional automatic registration of new vehicles (a successful login with a non-existent vehicle ID will simply create it with a random server password).<br class=""><br class=""></li><li class="">Removed the restriction that vehicle ID should be unique on the server (now just unique for each user).<br class=""><br class=""></li><li class="">The preferred approach for a new app/car connection will then be:</li><ul class=""><li class="">The user is interactively asked to select a server and provide his username+password</li><li class="">A usage identifier and description is generated programatically</li><li class="">The HTTP API is used to obtain a token (or recall the token if previously registered)</li><li class="">The username, usage identifier, and token are stored persistently</li><li class="">The username, token, and vehicle ID is used to login using v2 or v3 protocols<br class=""><br class=""></li></ul><li class="">So, three complementary authentication mechanisms are provided:</li><ul class=""><li class="">The v2 vehicleid+serverpassword mechanism (with full permissions to access that particular vehicle)</li><li class="">Username+Password mechanism (with full permission to maintain tokens, access all vehicles, and do everything)</li><li class="">Username+Token mechanism (with permissions specified on the token)</li></ul></ul><div class=""><br class=""></div><div class="">Comments welcome, and we can refine the above if necessary, but it is at least a starting point. I am trying to maintain as much flexibility as possible, but at the same time make things easier for the user. I’ve had four support requests so far this week for people messing up either the server they are using (app api.openvehicles, car dexters-web), the vehicle ID, or confusion between all the passwords.</div><div class=""><br class=""></div><div class="">Regards, Mark.<br class=""><div class=""><br class=""><blockquote type="cite" class=""><div class="">On 23 Feb 2020, at 8:54 PM, Mark Webb-Johnson <<a href="mailto:mark@webb-johnson.net" class="">mark@webb-johnson.net</a>> wrote:</div><br class="Apple-interchange-newline"><div class=""><meta http-equiv="Content-Type" content="text/html; charset=utf-8" class=""><div style="word-wrap: break-word; -webkit-nbsp-mode: space; line-break: after-white-space;" class=""><div dir="auto" style="word-wrap: break-word; -webkit-nbsp-mode: space; line-break: after-white-space;" class="">This is turning into a bigger job than I imagined. "Give a mouse a cookie", and all that.<div class=""><br class=""></div><div class="">The ovms_server.pl has gotten horrendous over the years. Almost 3,000 monolithic lines of code, 4 server listeners, three different types of server, push notifications, database synchronisation, etc. I tried turning on ‘use strict’ and it showed up a bunch of bugs and errors.</div><div class=""><br class=""></div><div class="">So, I am refactoring it to a plugin architecture. That should make it more maintainable, and also provide a foundation for it to work better with the v3 MQTT. I suggest people hold off from making any changes to the server code in the next few days.</div><div class=""><br class=""></div><div class="">Regards, Mark<br class=""><div class=""><div class=""><br class=""><blockquote type="cite" class=""><div class="">On 21 Feb 2020, at 9:48 PM, Mark Webb-Johnson <<a href="mailto:mark@webb-johnson.net" class="">mark@webb-johnson.net</a>> wrote:</div><br class="Apple-interchange-newline"><div class=""><meta http-equiv="content-type" content="text/html; charset=utf-8" class=""><div dir="auto" class=""><div dir="ltr" class="">Ok. I will rework a modular approach. Should be able to get this done over the weekend.</div><div dir="ltr" class=""><br class=""></div><div dir="ltr" class="">Yes, strict and warn would help.</div><div dir="ltr" class=""><br class=""></div><div dir="ltr" class="">Mark</div><div dir="ltr" class=""><br class=""></div><div dir="ltr" class="">P.S. Explains why nobody used the http api on my server :-)</div><div dir="ltr" class=""><br class=""><blockquote type="cite" class="">On 21 Feb 2020, at 9:35 PM, Michael Balzer <<a href="mailto:dexter@expeedo.de" class="">dexter@expeedo.de</a>> wrote:<br class=""><br class=""></blockquote></div><blockquote type="cite" class=""><div dir="ltr" class="">
<meta http-equiv="Content-Type" content="text/html; charset=UTF-8" class="">
Thanks Mark,<br class="">
<br class="">
I must have been blind… but perl also never fails to amaze me in
terms of "compiles fine, but won't run" -- $ph isn't defined
anywhere else. Maybe "strict" mode would have told me about that.<br class="">
<br class="">
And I didn't think about meta data in the hash. You're right, we
need to pass both values to the function. And I need to rework my
password hashing…<br class="">
<br class="">
A modular solution seems to be best, easy to add custom
implementations and to provide some standard modules.<br class="">
<br class="">
Regards,<br class="">
Michael<br class="">
<br class="">
<br class="">
<div class="moz-cite-prefix">Am 21.02.20 um 12:15 schrieb Mark
Webb-Johnson:<br class="">
</div>
<blockquote type="cite" cite="mid:F4FAF182-04FF-4255-AAB6-6D7C1F9F565B@webb-johnson.net" class="">
<meta http-equiv="Content-Type" content="text/html; charset=UTF-8" class="">
<div class=""><br class="">
</div>
An alternative would be to implement a server authentication
module, and to ‘require’ that into the system at startup:
<blockquote style="margin: 0 0 0 40px; border: none; padding:
0px;" class=""><br class="">
require $config->val('db',’pw_module’,’auth_none.pl’);</blockquote>
<blockquote style="margin: 0 0 0 40px; border: none; padding:
0px;" class=""><br class="">
</blockquote>
<blockquote style="margin: 0 0 0 40px; border: none; padding:
0px;" class="">…</blockquote>
<blockquote style="margin: 0 0 0 40px; border: none; padding:
0px;" class=""><br class="">
</blockquote>
<blockquote style="margin: 0 0 0 40px; border: none; padding:
0px;" class="">If (&auth_password_check($passwordhash,
$password))</blockquote>
<blockquote style="margin: 0 0 0 40px; border: none; padding:
0px;" class=""> ...</blockquote>
<div class="">
<div class=""><br class="">
</div>
<div class="">Provide a ‘auto_none.pl’:</div>
<div class=""><br class="">
</div>
</div>
<blockquote style="margin: 0 0 0 40px; border: none; padding:
0px;" class="">
<div class="">
<div class="">#!/usr/bin/perl</div>
</div>
<div class=""><br class="">
</div>
<div class="">sub auth_password_check</div>
<div class=""> {</div>
<div class=""> my ($hash,$password) = @_;</div>
<div class=""><br class="">
</div>
<div class=""> return 0;</div>
<div class=""> }</div>
</blockquote>
<div class="">
<div class=""><br class="">
</div>
<div class="">Then a ‘auth_drupal7.pl’, ‘auth_sha1.pl’, etc.</div>
<div class=""><br class="">
</div>
<div class="">This could also be done in a perl modular fashion by having
the module provided as an object (using ‘use …’). Probably
cleaner than the old-style require.</div>
<div class=""><br class="">
</div>
<div class="">That is much more extendable and standardised. In
particular, there is also code that syncs Drupal users to
ovms_owners (svr_tim) and if we have a separate module that
drupal-dependant code could be removed from ovms_server.pl.</div>
<div class=""><br class="">
</div>
<div class="">Is that a better solution?</div>
<div class=""><br class="">
</div>
<div class="">Regards, Mark.</div>
<div class=""><br class="">
<blockquote type="cite" class="">
<div class="">On 21 Feb 2020, at 11:37 AM, Mark Webb-Johnson
<<a href="mailto:mark@webb-johnson.net" class="" moz-do-not-send="true">mark@webb-johnson.net</a>>
wrote:</div>
<br class="Apple-interchange-newline">
<div class="">
<meta http-equiv="Content-Type" content="text/html;
charset=UTF-8" class="">
<div style="word-wrap: break-word; -webkit-nbsp-mode:
space; line-break: after-white-space;" class="">Michael,
<div class=""><br class="">
</div>
<div class="">Just before your commit, the server code
was:</div>
<div class=""><br class="">
</div>
<blockquote style="margin: 0 0 0 40px; border: none;
padding: 0px;" class="">
<div class="">
<div class=""><font class="" face="Andale Mono"><span style="font-style: normal; font-size: 14px;" class="">my $passwordhash = $row->{'pass'};</span></font></div>
<div class=""><font class="" face="Andale Mono"><span style="font-style: normal; font-size: 14px;" class="">if
(&drupal_password_check($passwordhash,
$password))</span></font></div>
</div>
<div class=""><font class="" face="Andale Mono"><span style="font-style: normal; font-size: 14px;" class=""><br class="">
</span></font></div>
<div class=""><font class="" face="Andale Mono"><span style="font-style: normal; font-size: 14px;" class="">…</span></font></div>
<div class=""><font class="" face="Andale Mono"><span style="font-style: normal; font-size: 14px;" class=""><br class="">
</span></font></div>
<div class="">
<div class=""><font class="" face="Andale Mono"><span style="font-style: normal; font-size: 14px;" class="">sub drupal_password_check</span></font></div>
<div class=""><font class="" face="Andale Mono"><span style="font-style: normal; font-size: 14px;" class=""> {</span></font></div>
<div class=""><font class="" face="Andale Mono"><span style="font-style: normal; font-size: 14px;" class=""> my ($ph,$password) = @_;</span></font></div>
<div class=""><font class="" face="Andale Mono"><span style="font-style: normal; font-size: 14px;" class=""><br class="">
</span></font></div>
<div class=""><font class="" face="Andale Mono"><span style="font-style: normal; font-size: 14px;" class=""> my $iter_log2 =
index($itoa64,substr($ph,3,1));</span></font></div>
<div class=""><font class="" face="Andale Mono"><span style="font-style: normal; font-size: 14px;" class=""> my $iter_count = 1 <<
$iter_log2;</span></font></div>
<div class=""><font class="" face="Andale Mono"><span style="font-style: normal; font-size: 14px;" class=""><br class="">
</span></font></div>
<div class=""><font class="" face="Andale Mono"><span style="font-style: normal; font-size: 14px;" class=""> my $phash = substr($ph,0,12);</span></font></div>
<div class=""><font class="" face="Andale Mono"><span style="font-style: normal; font-size: 14px;" class=""> my $salt = substr($ph,4,8);</span></font></div>
<div class=""><font class="" face="Andale Mono"><span style="font-style: normal; font-size: 14px;" class=""><br class="">
</span></font></div>
<div class=""><font class="" face="Andale Mono"><span style="font-style: normal; font-size: 14px;" class=""> my $hash = sha512($salt.$password);</span></font></div>
<div class=""><font class="" face="Andale Mono"><span style="font-style: normal; font-size: 14px;" class=""> do</span></font></div>
<div class=""><font class="" face="Andale Mono"><span style="font-style: normal; font-size: 14px;" class=""> {</span></font></div>
<div class=""><font class="" face="Andale Mono"><span style="font-style: normal; font-size: 14px;" class=""> $hash = sha512($hash.$password);</span></font></div>
<div class=""><font class="" face="Andale Mono"><span style="font-style: normal; font-size: 14px;" class=""> $iter_count--;</span></font></div>
<div class=""><font class="" face="Andale Mono"><span style="font-style: normal; font-size: 14px;" class=""> } while ($iter_count > 0);</span></font></div>
<div class=""><font class="" face="Andale Mono"><span style="font-style: normal; font-size: 14px;" class=""><br class="">
</span></font></div>
<div class=""><font class="" face="Andale Mono"><span style="font-style: normal; font-size: 14px;" class=""> my $encoded = substr($phash .
&drupal_password_base64_encode($hash,length($hash)),0,55);</span></font></div>
<div class=""><font class="" face="Andale Mono"><span style="font-style: normal; font-size: 14px;" class=""><br class="">
</span></font></div>
<div class=""><font class="" face="Andale Mono"><span style="font-style: normal; font-size: 14px;" class=""> return ($encoded eq $ph);</span></font></div>
<div class=""><font class="" face="Andale Mono"><span style="font-style: normal; font-size: 14px;" class=""> }</span></font></div>
</div>
</blockquote>
<div class=""><br class="">
</div>
<div class="">Your change was:</div>
<div class=""><br class="">
</div>
<blockquote style="margin: 0 0 0 40px; border: none;
padding: 0px;" class="">
<div class="">
<div class=""><font class="" face="Andale Mono"><span style="font-style: normal; font-size: 14px;" class=""># User password encoding function:</span></font></div>
<div class=""><font class="" face="Andale Mono"><span style="font-style: normal; font-size: 14px;" class="">my $pw_encode =
$config->val('db','pw_encode','drupal_password($password)’);</span></font></div>
</div>
<div class=""><font class="" face="Andale Mono"><span style="font-style: normal; font-size: 14px;" class=""><br class="">
</span></font></div>
<div class=""><font class="" face="Andale Mono"><span style="font-style: normal; font-size: 14px;" class="">…</span></font></div>
<div class=""><font class="" face="Andale Mono"><span style="font-style: normal; font-size: 14px;" class=""><br class="">
</span></font></div>
<div class="">
<div class=""><font class="" face="Andale Mono"><span style="font-style: normal; font-size: 14px;" class="">my $passwordhash = $row->{'pass'};</span></font></div>
<div class=""><font class="" face="Andale Mono"><span style="font-style: normal; font-size: 14px;" class="">my $encoded = eval $pw_encode;</span></font></div>
<div class=""><font class="" face="Andale Mono"><span style="font-style: normal; font-size: 14px;" class="">if ($encoded eq $passwordhash)</span></font></div>
</div>
<div class=""><font class="" face="Andale Mono"><span style="font-style: normal; font-size: 14px;" class=""><br class="">
</span></font></div>
<div class=""><font class="" face="Andale Mono"><span style="font-style: normal; font-size: 14px;" class="">…</span></font></div>
<div class=""><font class="" face="Andale Mono"><span style="font-style: normal; font-size: 14px;" class=""><br class="">
</span></font></div>
<div class="">
<div class=""><font class="" face="Andale Mono"><span style="font-style: normal; font-size: 14px;" class="">sub drupal_password</span></font></div>
<div class=""><font class="" face="Andale Mono"><span style="font-style: normal; font-size: 14px;" class=""> {</span></font></div>
<div class=""><font class="" face="Andale Mono"><span style="font-style: normal; font-size: 14px;" class=""> my ($password) = @_;</span></font></div>
<div class=""><font class="" face="Andale Mono"><span style="font-style: normal; font-size: 14px;" class=""><br class="">
</span></font></div>
<div class=""><font class="" face="Andale Mono"><span style="font-style: normal; font-size: 14px;" class=""> my $iter_log2 =
index($itoa64,substr($ph,3,1));</span></font></div>
<div class=""><font class="" face="Andale Mono"><span style="font-style: normal; font-size: 14px;" class=""> my $iter_count = 1 <<
$iter_log2;</span></font></div>
<div class=""><font class="" face="Andale Mono"><span style="font-style: normal; font-size: 14px;" class=""><br class="">
</span></font></div>
<div class=""><font class="" face="Andale Mono"><span style="font-style: normal; font-size: 14px;" class=""> my $phash = substr($ph,0,12);</span></font></div>
<div class=""><font class="" face="Andale Mono"><span style="font-style: normal; font-size: 14px;" class=""> my $salt = substr($ph,4,8);</span></font></div>
<div class=""><font class="" face="Andale Mono"><span style="font-style: normal; font-size: 14px;" class=""><br class="">
</span></font></div>
<div class=""><font class="" face="Andale Mono"><span style="font-style: normal; font-size: 14px;" class=""> my $hash = sha512($salt.$password);</span></font></div>
<div class=""><font class="" face="Andale Mono"><span style="font-style: normal; font-size: 14px;" class=""> do</span></font></div>
<div class=""><font class="" face="Andale Mono"><span style="font-style: normal; font-size: 14px;" class=""> {</span></font></div>
<div class=""><font class="" face="Andale Mono"><span style="font-style: normal; font-size: 14px;" class=""> $hash = sha512($hash.$password);</span></font></div>
<div class=""><font class="" face="Andale Mono"><span style="font-style: normal; font-size: 14px;" class=""> $iter_count--;</span></font></div>
<div class=""><font class="" face="Andale Mono"><span style="font-style: normal; font-size: 14px;" class=""> } while ($iter_count > 0);</span></font></div>
<div class=""><font class="" face="Andale Mono"><span style="font-style: normal; font-size: 14px;" class=""><br class="">
</span></font></div>
<div class=""><font class="" face="Andale Mono"><span style="font-style: normal; font-size: 14px;" class=""> my $encoded = substr($phash .
&drupal_password_base64_encode($hash,length($hash)),0,55);</span></font></div>
<div class=""><font class="" face="Andale Mono"><span style="font-style: normal; font-size: 14px;" class=""><br class="">
</span></font></div>
<div class=""><font class="" face="Andale Mono"><span style="font-style: normal; font-size: 14px;" class=""> return $encoded;</span></font></div>
<div class=""><font class="" face="Andale Mono"><span style="font-style: normal; font-size: 14px;" class=""> }</span></font></div>
</div>
</blockquote>
<div class="">
<div class=""><br class="">
</div>
<div class="">You changed the parameters from
($ph,$password) to just ($password), but the
drupal_password function still needs to use $ph (the
hash) to extract meta data to set the encoding
parameters.</div>
<div class=""><br class="">
</div>
<div class="">The problem is that Drupal (and others)
has a strong hashing function with multiple
iterations. The meta data for that is stored in the
password hash itself. The unix crypt library does
something similar (with the encoding method and salt
stored as meta data in the hash). Just storing
passwords as straight hashes (md5, sha1, etc) is
fundamentally not secure, as it is trivial to use
rainbow tables to break the hashes - so most modern
systems use iterations, salts, or other techniques
to limit the effectiveness of rainbow tables and
make brute force approaches computationally
unfeasible.</div>
<div class=""><br class="">
</div>
<div class="">For many systems, we can only encode a
password in the same way as a previous encoding if
we know the meta data of the previous encoding (and
that is stored in the hash). Hence we need the hash
as a parameter, to extract the meta data to be able
to encode the new password in the same way.</div>
<div class=""><br class="">
</div>
<div class="">This won’t just affect drupal, but any
system with a non-trivial password hashing function.</div>
<div class=""><br class="">
</div>
<div class="">So, pw_encode() needs both the old hash
as well as the plaintext password to encode. At
which point, I think it becomes easier to make it
simply pw_check() returning a boolean. It also seems
easier to me to do that as a plugin function
(pw_check vs pw_encode) as it will allow other
non-trivial hashing comparisons if required. For
example, say you needed to check the password
against an external lookup (ldap, etc).</div>
<div class=""><br class="">
</div>
<div class="">Regards, Mark.</div>
<div class=""><br class="">
<blockquote type="cite" class="">
<div class="">On 21 Feb 2020, at 1:12 AM, Michael
Balzer <<a href="mailto:dexter@expeedo.de" class="" moz-do-not-send="true">dexter@expeedo.de</a>>
wrote:</div>
<br class="Apple-interchange-newline">
<div class="">
<meta http-equiv="Content-Type" content="text/html; charset=UTF-8" class="">
<div class=""> Mark,<br class="">
<br class="">
I did 1b73a7f8 to split the "create &
compare password" function into separate
"create" & "compare" steps, and introduced
the "pw_encode" config hook to be able to
supply just a custom "create" operation. That
simplifies the config (see example).<br class="">
<br class="">
That change has been working since 2016 on my
server. I see you reintroduced the "create
& compare" function as a separate function
for the MQTT auth, but don't see why that was
needed. I also don't see why the separated
function was broken on your server. Can you
please elaborate? I'd like to understand what
was going wrong.<br class="">
<br class="">
With reverting to the "create & compare",
this breaks the configuration of servers not
using Drupal. Essentially, the new "pw_check"
hook does just the previous "pw_encode" and
adds the comparison to that, so I'd rather opt
for adding a default function here that simply
reuses the existing "pw_encode" hook.<br class="">
<br class="">
Regards,<br class="">
Michael<br class="">
<br class="">
<br class="">
<div class="moz-cite-prefix">Am 20.02.20 um
04:09 schrieb Mark Webb-Johnson:<br class="">
</div>
<blockquote type="cite" cite="mid:F48FF6EE-9CB9-4DB5-8106-BE4CD73C5AE3@webb-johnson.net" class="">
<meta http-equiv="Content-Type" content="text/html; charset=UTF-8" class="">
Even stranger. This conversation obviously
triggered someone to try it and then raise a
support ticket that HTTP API authentication
didn’t work.
<div class=""><br class="">
</div>
<div class="">It seems a change was made
back in 2016-02-01 23:59:22 (1b73a7f8)
that broke the pw_encode function
(drupal_password). It was also weird
because we had drupal_password and
drupal_password_check functions, doing
pretty much the same thing (one used by
HTTP API and the other by MQ
authentication).</div>
<div class=""><br class="">
</div>
<div class="">I standardised to use a new
pw_check (overridable in the config)
parameter, which defaults to:</div>
<div class=""><br class="">
</div>
<blockquote style="margin: 0 0 0 40px;
border: none; padding: 0px;" class="">
<div class=""><font class="" face="Andale
Mono"><span style="font-style: normal;
font-size: 14px;" class="">drupal_password_check($passwordhash,$password)</span></font></div>
</blockquote>
<div class="">
<div class=""><br class="">
</div>
<div class="">and stopped using the
pw_encode config value. I also changed
the MQ authentication stuff to use the
same pw_check parameter (so both
authentication uses are now able to be
changed in the same config). If using
something other than drupal, just need
to change the pw_check parameter in the
config.</div>
<div class=""><br class="">
</div>
<div class="">I realise that this may
break other users of the server, but it
doesn’t seem a difficult fix to make,
and is a much better approach.</div>
<div class=""><br class="">
</div>
<div class="">Regards, Mark</div>
<div class=""><br class="">
<blockquote type="cite" class="">
<div class="">On 19 Feb 2020, at 1:53
PM, Mark Webb-Johnson <<a href="mailto:mark@webb-johnson.net" class="" moz-do-not-send="true">mark@webb-johnson.net</a>>
wrote:</div>
<br class="Apple-interchange-newline">
<div class="">
<div class="">Strange. I have zero
using mine. Must be a EU thing?<br class="">
<br class="">
I’ll keep it in mind and try not
to break anything.<br class="">
<br class="">
Regards, Mark.<br class="">
<br class="">
<blockquote type="cite" class="">On
18 Feb 2020, at 8:41 PM, Michael
Balzer <<a href="mailto:dexter@expeedo.de" class="" moz-do-not-send="true">dexter@expeedo.de</a>>
wrote:<br class="">
<br class="">
Mark,<br class="">
<br class="">
grep "main: http" in the log:
yes, I've got some users
accessing the API frequently.<br class="">
<br class="">
Usage is mostly /api/charge
followed by /api/status &
/api/historical, but almost all
calls have been used during the
last days.<br class="">
<br class="">
Regards,<br class="">
Michael<br class="">
<br class="">
<br class="">
Am 18.02.20 um 04:28 schrieb
Mark Webb-Johnson:<br class="">
<blockquote type="cite" class="">Is
anyone here using the HTTP API
at all?<br class="">
<br class="">
It seems so tied to the v2
protocol, as to not be much
use.<br class="">
<br class="">
Regards, Mark.<br class="">
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Weg 9 * D-58256 Ennepetal<br class="">
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