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-<h1>LDAP Gateway</h1>
-<p>
-The LDAP directory has a PGP secured mail gateway that
-allows users to safely and conveniently effect changes to their entries. It
-makes use of PGP signed input messages to positively identify the user and
-to confirm the validity of the request. Furthermore it implements a replay
-cache that prevents the gateway from accepting the same message more than
-once.
-<p>
-There are three functions logically split into 3 seperate email addresses
-that are implemented by the gateway: <b>ping</b>, <b>new password</b> and
-<b>changes</b>. The function to act on is the first argument to the program.
-<p>
-Error handling is currently done by generating a bounce message and passing
-descriptive error text to the mailer. This can generate a somewhat hard to
-read error message, but it does have all the relevent information.
-<h1>Ping</h1>
-The ping command simply returns the users public record. It is useful for
-testing the gateway and for the requester to get a basic dump of their
-record. In future this address might 'freshen' the record to indicate the
-user is alive. Any PGP signed message will produce a reply.
-<h1>New Password</h1>
-If a user looses their password they can request that a new one be generated
-for them. This is done by sending the phrase "Please change my Debian
-password" to chpasswd@db.debian.org. The phrase is required to prevent the
-daemon from triggering on arbitary signed email. The best way to invoke this
-feature is with
-<pre>echo "Please change my Debian password" | gpg --clearsign | mail chpasswd@db.debian.org</pre>
-After validating the request the daemon will generate a new random password,
-set it in the directory and respond with an encrpyted message containing the
-new password. The password can be changed using one of the other interface
-methods.
-<h1>Changes</h1>
-An address (changes@db.debian.org) is provided for making almost arbitary
-changes to the contents of the record. The daemon parses its input line by
-line and acts on each line in a command oriented manner. Anything, except for
-passwords, can be changed using this mechanism. Note however that because
-this is a mail gateway it does stringent checking on its input. The other
-tools allow fields to be set to virtually anything, the gateway requires
-specific field formats to be met.
-<ul>
-<li>A line of the form <tt>'field: value'</tt> will change the contents of
-the field to value. Some simple checks are performed on value to make sure
-that it is not set to nonsense. The values that can be changed are:
-<b>c</b>, <b>l</b>, <b>facsimiletelephonenumber</b>, <b>telephonenumber</b>,
-<b>postaladdress</b>, <b>postalcode</b>,
-<b>loginshell</b>, <b>emailforward</b>, <b>ircnick</b>, <b>onvacation</b>,
-and <b>labledurl</b>
-<li>The daemon has a special parser to help changing latitude and longitude
-values. It accepts several common formats for position information and
-converts them to one of the standard forms. The permitted types are
-<pre>D = Degrees, M = Minutes, S = Seconds, x = n,s,e,w
-+-DDD.DDDDD, +- DDDMM.MMMM, +-DDDMMSS.SSSS [standard forms]
-DDxMM.MMMM, DD:MM.MMMM x, DD:MM:SS.SSS X)</pre>
-and the request format is <tt>'Lat: xxx Long: xxx'</tt> where <tt>xxx</tt>
-is one of the permitted types. The resulting response will include how the
-input was parsed and the value in decimal degrees.
-<li>
-Part of the replicated dataset is a virtual .ssh/authorized_keys file for
-each user. The change address is the simplest way to set the RSA key(s) you
-intend to use. Simply place a key on a line by itself, the full SSH key
-format specification is supported, see sshd(8). Probably the most common way
-to use this function will be
-<pre>cat .ssh/identity.pub | gpg --clearsign | mail change@db.debian.org</pre>
-which will set the authentication key to the identity you are using.
-Multiple keys per user are supported, but they must all be sent at once.
-<li>Debian.net DNS Zone Entry. The only way to get a debian.net address is
-to use the mail gateway. It
-will verify the request and prevent name collisions automatically. Requests
-can take two forms: <tt>'foo in a 1.2.3.4'</tt> or <tt>'foo in cname
-foo.bar.'</tt> The precise form is critical and must not be deviated from.
-Like the SSH function above, multiple hosts are supported, but they must all
-be sent at once. The debian.net zone is only reloaded once per day at
-midnight -0700.
-<li>If the single word <b>show</b> appears on a line then a PGP encrypted version
-of the entire record will be attached to the resulting email.
-</ul>
-After processing the requests the daemon will generate a report which contains
-each input command and the action taken. If there are any parsing errors
-processing stops immediately, but valid changes up to that point are
-processed.
-<h2>Notes</h2>
-<p>
-In this document PGP refers to any message or key that GnuPG is
-able to generate or parse, specificaly it includes both PGP2.x and OpenPGP
-(aka GnuPG) keys.
-<p>
-Due to the replay cache the clock on the computer that generates the
-signatures has to be accurate to at least one day. If it is off by several
-months or more then the deamon will outright reject all messages.
-<p>
-Examples are given using GnuPG, but PGP 2.x can also be used. The correct
-options to generate a clear signed ascii armored message in 'filter' mode
-are <tt>pgp -fast</tt> which does the same as <tt>gpg --clearsign</tt>
-<p>
-Debian.org machines rely on secured replication to transfer login data out
-of the database. Replication is performed at 15 min intervals so it can take
-a short while before any changes made take effect.
-<hr noshade width="100%" size="1">
-Back to the <a href="http://www.debian.org/">Debian Project homepage</a>.
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-You can contact us at
-<a href="mailto:admin@db.debian.org">admin@db.debian.org</a>.
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-<small>
-Last Modified: Fri, Jul 12 17:23:30 UTC 2002
- <br>
- Copyright © 1997-2002
- <a href="http://www.spi-inc.org/">SPI</a>; See <a href="http://www.debian.org/license">license terms</a>
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projects / mirror / userdir-ldap.git / blobdiff