[midPoint] Construct Password for SASL Pass Through

[Ivan Noris]

Brad, 

I once tried similar thing, which was not yet deployed into production with that customer. So you may try it, it might actually work. 

In my case I wanted to take/decrypt midPoint password and hash it with (MD5 in my example, use something stronger :-) ) function and base64-encode. It looked like it works, but it was onyl deployed with my prototype (CSV or DB table; not real resource). 

<credentials> 
<password> 
<outbound> 
<expression> 
<script> 
<code> 
import com.evolveum.midpoint.prism.crypto.Protector 
import java.security.MessageDigest 
import com.evolveum.prism.xml.ns._public.types_3.ProtectedStringType 
import javax.xml.bind.DatatypeConverter 

Protector protector = midpoint. at protector 

MessageDigest md = MessageDigest.getInstance("MD5") // XXX SHA-2 

log.info('midpoint protector = {}', midpoint. at protector) 
if (input) { 
clr = protector?.decryptString(input) 
log.info("XXXXXXXXXXXXXXX input = {}, clr = {}", input, clr) 

md.update(clr.getBytes("UTF-8")); 
byte[] digest = md.digest() 

base64 = '{MD5}' + DatatypeConverter.printBase64Binary(digest) 
log.info("XXXXXXXX base64 = {}", base64) 

newPassword = base64 
return protector?.encryptString(newPassword) 
} 
</code> 
</script> 
</expression> 
</outbound> 
<!-- FIXME this is Default Password Policy --> 
<passwordPolicyRef oid="00000000-0000-0000-0000-000000000003"/> 
</password> 
</credentials> 

Of course my mapping would influence all accounts. 

Regarding other sources for password (like your $user/name), I think it was not implemented as the other (attribute) mappings, at least not in older versions of midPoint. In 3.6 it might be different. 

Maybe someone from developers will have anything to add. Or someone from the list who actually has such things up and running. 

Best regards, 
Ivan 

----- Original Message -----

> From: "Brad Firestone" <bhotrock at gmail.com>
> To: "midPoint General Discussion" <midpoint at lists.evolveum.com>
> Sent: Friday, May 5, 2017 9:44:38 PM
> Subject: [midPoint] Construct Password for SASL Pass Through

> Hi All,

> I have one certain group of users that will be provisioned on an OpenLDAP
> resource. This group of users needs to use SASL Pass Through to Active
> Directory, so the password stored in OpenLDAP userPassword attribute will be
> in the format of:
> { SASL}user at example.com
> Here's some information about SASL Pass Through:
> https://ltb-project.org/documentation/general/sasl_delegation

> I have this configured and working, if I enter the password directly into
> OpenLDAP. But I need to have midPoint enter this value automatically.

> I can easily construct this value using Groovy, but because it's a
> "password", I can't seem to work with it in midPoint like other attributes.
> Here are the things I've tried:

> 1. Tried to generate it using an outbound expression in <credentials> for the
> OpenLDAP resource.
> <credentials>
> <password>
> <outbound>
> <source>
> <path>$user/name</path>
> </source>
> <expression>
> <script>
> <code>'{SASL}' + name</code>
> </script>
> </expression>
> </outbound>
> </password>
> </credentials>

> This doesn't throw any errors, but I don't know if it's really generating the
> right value, because when it stores the password on the resource, it hashes
> it, like normal. And the pass through function doesn't work.

> 2. I tried to bypass the password hashing function by generating the needed
> value in the User Template, and storing it in midPoint $user/costCenter. I
> then tried to use outbound mapping in a Role to map $user/costCenter to
> ri:userPassword. That gave an error of:
> Attribute { http://midpoint.evolveum.com/xml/ns/public/resource/instance-3
> }userPassword not found in schema for account type default, resource:
> Account Testing OpenLDAP (OID:d0811790-1d80-11e4-86b2-3c970e467874) as
> definied in role: HQ-User (OID:880f1186-2f77-11e7-93c2-bfabd497cae2) .
> userPassword is the attribute used in the OpenLDAP resource, but I'm guessing
> it's not treated like other attributes.

> Is there anyway to pass a "plain text" value to a resource userPassword
> attribute? If so, then I will need to do this for only ONE set of users. The
> rest of the user accounts on that resource need to be handled in a normal
> way.

> Thanks for any suggestions!
> Brad

> _______________________________________________
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> midPoint at lists.evolveum.com
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-- 
Ivan Noris 
Senior Identity Engineer 
evolveum.com 
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