Hi Mark,
On 18/04/2011 22:15, Mark Inaba wrote:
is there no way to say my DN is 'cn=minaba,DC=foo,DC=com' in the bind request
and have the ldap server itself know who i mean? what determines just how many
X=y pairs are needed to make a bindable DN? is that configured by the
administrator or is it every non-leaf/DC,CN,OU that i'm a part of? i'm still
perplexed how ldap.exe can
magically bind me with only the following info neither of which is my DN:
user: minaba
pass: *******
domain: earth.foo.com
user: marsinaba
pass: *******
domain: mars.foo.com
You can do
$ad->bind( 'min...@earth.foo.com',password=>'MyPassword') or die "$@";
$ad->bind( 'marsin...@mars.foo.com',password=>'HisPassword') or die "$@";
Which might help you.
Cheers,
Duncan
(and they both work! how!? did he give me an app that already has the reader
account in the settings? i looked but didn't see anything..but gui's...i never
know if i've seen the entire confituration...grepping a .conf seems much easier
:)
hmm LDAPS and SASL... i guess LDAPS would protect me from sniffers and SASL
would protect me from vi'ers (assuming i have to keep the script world readable
and i have to use a reader/test/bind account.) i hope i'll be able to use both,
but the dev ldap doesn't have encrpytion so i'll have to wait till i can target
our prod ldap server..wherever that is...
thanks much for your help! i guess if i can't find what makes the ldap.exe
magical, i'll just sit on my current script version that uses a reader account
and cross the bridges as they appear...
-mark
-----Original Message-----
From: Dan Cutler [mailto:dcut...@intelimedix.com]
Sent: Thursday, April 14, 2011 3:55 PM
To: Mark Inaba
Cc: 'perl-ldap@perl.org'
Subject: RE: basic question about binding without knowing the DN
Mark,
"AD" = Active Directory. This is Microsoft's version of an LDAP server.
I've literally been where you are; don't give up, rewards are great ;-)
The simple answer is unfortunately "not so simple".
From my perspective, the "owner" of the directory should give you a read-only
system account so that you can determine the DN of users (ie do searches).
Since you need to provide a "base" to do a serach, you'll want to fetch the
root_dse to get the naming contexts. This value will be the base DN to start your search
from using the read only account.
ie:
use Net::LDAP;
use Net::LDAP::RootDSE;
use Data::Dumper;
my $user = "juser"; # a user's login
my $ldap = Net::LDAP->new(...)
my $mesg = $ldap->bind; #using your RO system account
my $dse = $ldap->root_dse(); # root dse is like "system settings"
# Try this
# perl Dumper $dse - to see all sorts of "settings".
#the get your base for searches...
my $base_to_start_all_searches = $dse->get_value('namingContexts');
# do you search :
# my $result = $ldap->search( base => $base_to_start_all_searches,
scope => 'sub',
filter => "(sAMAccountName=$user)");
# * "sAMAccountName" is a MS field, your actual field will vary depending on
LDAP server...
foreach my $entr ($search->entries) {
my $user_dn = $entr->dn();
}
As for the whole SASL issue...
This is a little tricky.
Its difficult to set up (particularly if you are going from say Linux to
Windoze).
I personally use LDAPS from Linux to AD (MS LDAP) to get to the good stuff
(like being able to set initial passwords from a script running on Linux).
From a "security perspective", storing a login/pw is not the best solution however its
also not a horribly bad one either. As long as the "system account" that you use to bind
with can't do anything but bind and do searches, this is preferable to convincing the owner of the
directory to open it for anonymous binds. So while not ideal, its better than other alternatives.
In either case, you should use LDAPS (ie wire encryption) so that
eavesdroppers, will not see anything useful.
This is a whole other topic for another day...
-----Original Message-----
From: Mark Inaba [mailto:min...@nyx.com]
Sent: Thursday, April 14, 2011 3:27 PM
To: Dan Cutler
Subject: RE: basic question about binding without knowing the DN
hi dan,
so i was wondering if a user can bind with a subset of the DN...like foo.com.
i'm wondering how in the world
ldap.exe does it. another poster mentioned something about AD, but i don't know
how AD fits into LDAP (except that it's the middle two letters reversed..)
-----Original Message-----
From: Dan Cutler [mailto:dcut...@intelimedix.com]
Sent: Thursday, April 14, 2011 1:55 PM
To: Mark Inaba; 'perl-ldap@perl.org'
Subject: RE: basic question about binding without knowing the DN
Mark,
Wow. I remember having the EXACT same thoughts some years ago.
As it turns out, the process that happens when a user logs in is somewhat
"shielded" from the average user. Once you find out what is really happening,
you'll gain some great insights into LDAP processes.
It is quite typical to not allow anonymous searches. This usually a good idea.
Behind the scenes, "authenticating" requires three things:
An LDAP server that houses you "account"
An identifier called a "DN" (aka Distinguished Name) that represents the unique
identifier of your account
A valid password.
What can be quite puzzling is the DN.
Nearly every LDAP authentication script I write follows a process like this:
Collect the user's login name and passwd:
Bind to the directory using a known "system account" and "system" password.
Search the directory for this user (the login name is unique) and return its
"DN".
If the DN is found, use it as a parameter and bind again as the actual user
(you).
Does this help?
--Dan
-----Original Message-----
From: Mark Inaba [mailto:min...@nyx.com]
Sent: Thursday, April 14, 2011 1:23 PM
To: 'perl-ldap@perl.org'
Subject: basic question about binding without knowing the DN
hello perl-ldap mailing list,
i'm wondering if i'm trying to do the impossible, even though it seems like
this might be a common situation.
i'm trying to verify a user/password by having the user bind to an ldap server.
the problem is that just given a username, i can't guess the DN because the
DN's components have values that could be many things:
example:
CN=mark,OU=paris,OU=short,...,DC=partA,DC=foo,DC=com
CN=mike,OU=new york,OU=tall,...,DC=partB,DC=foo,DC=com
it seems that all of this is necessary for me to bind (i can't just use
CN=mark,DC=foo,DC=com and try a password against all matches sigh)
so if i get another user, i don't know what sort of OU values his/her DN will
have. also, the DC's might be different too.
here's the wrinkles that make it harder:
1) anon bind is turned off, so i can't search around for promising matches and
use their DN
2) they don't want a generic 'read' account to log in because they don't want
the password in a file.
but i might be ok if:
a) though if script is not called by user i might be able to convince
them to use o-r.
b) if the final server is sasl aware, i might be able to use an encrypted
string in the script
but here's why i think it MIGHT be possible... using the windows program:
ldap.exe
i noticed that i'm able to bind filling in only the fields:
USER: mark
PASSWORD: mypassword
DOMAIN: parta.foo.com
so unless the application knows some secret settings...how does it authenticate
me without my telling it my full DN?
if i new that i think i could write my perl script that checks every user
against
DOMAIN: parta.foo.com and partb.foo.com
thanks for any help :)
-mark (not in paris...alas..)
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