[HADOOP-16023] Support system /etc/krb5.conf for auth_to_local rules

• Type: Improvement
• Status: Open
• Priority: Major
• Resolution: Unresolved
• Labels: security
• Tags: security
• Assignee: Bolke de Bruin
• Reporter: Bolke de Bruin
• Created: 30/Dec/18 15:45
• Updated: 11/Apr/19 20:16

Description

Hadoop has long maintained its own configuration for Kerberos' auth_to_local rules. To the user this is counter intuitive and increases the complexity of maintaining a secure system as the normal way of configuring these auth_to_local rules is done in the site wide krb5.conf usually /etc/krb5.conf.

With HADOOP-15996 there is now support for configuring how Hadoop should evaluate auth_to_local rules. A "system" mechanism should be added.

It should be investigated how to properly parse krb5.conf. JDK seems to be lacking as it is unable to obtain auth_to_local rules due to a bug in its parser. Apache Kerby has an implementation that could be used. A native (C) version is also a possibility.

Issue Links

• depends upon: DIRKRB-730 Unable to parse krb5.conf rules due to java.lang.IndexOutOfBoundsException
• depends upon: HADOOP-15996 Plugin interface to support more complex usernames in Hadoop