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When configuring MIT Kerberos to use an LDAP database instead of DB2, I was surprised to see that user password hashes are stored in two different fields: userPassword and krbPrincipalKey. Seems the hashing algorithms may be different, but that seems unnecessary too. Why not just consolidate to avoid synchronization issues?

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OpenLDAP cannot directly handle krbPrincipalKey data for authentication. I am not entirely familiar with how FreeIPA handles handles passwords, but for other OpenLDAP/Kerberos installations, OpenLDAP is often instructed to use SASL passthrough authentication.

  • Yes, but why? It seems it would be easier to update either Kerberos or the LDAP server to be able handle a different password field format then go through all the trouble to handle keeping two separate fields in sync or setting up an external SASL daemon for SASL passthrough. – Ryan Apr 10 '18 at 13:45

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