...
This page is meant as a template for writing a KIP. To create a KIP choose Tools->Copy on this page and modify with your content and replace the heading with the next KIP number and a description of your issue. Replace anything in italics with your own description.
Status
Current state: ["Under Discussion"] Accepted
Discussion thread: here
JIRA:
here Jira server ASF JIRA columns key,summary,type,created,updated,due,assignee,reporter,priority,status,resolution serverId 5aa69414-a9e9-3523-82ec-879b028fb15b key KAFKA-5764
Please keep the discussion on the mailing list rather than commenting on the wiki (wiki discussions get unwieldy fast).
...
However, this may not be desired given how different operating system handle usernames, whereas where some are case-sensitive and some are case-insensitive. For example, Linux is case-sensitive and Windows is case-insensitive. To help with this issue, the rule can support to force the translated result to be all lower case.Reference
Proposed Changes
We propose to extend "sasl.kerberos.principal.to.local.rules" config rule format/syntax by supporting an optional "/L" (toLowerCase) at the end of the rule. However, it must be noted that this does not affect how pattern matches on input and therefore that will still be case-sensitive. Since usernames are locale insensitive strings, we propose to use Locale.ENGLISH for the case conversion
For example, given the rules
Code Block |
---|
"RULE:[2:$1@$0](joe-qa-.*@EXAMPLE.COM)s/.*/JOE-QA//L", "RULE:[2:$1@$0](JOE-QA-.*@EXAMPLE.COM)s/.*/JOE-QA-UPPER//L", "RULE:[2:$1@$0](.*@EXAMPLE.COM)s/@.*///L" |
...
Code Block |
---|
If the source string is joe-qa-cl1/host@EXAMPLE.COM, the result will isbe joe-qa If the source string is JOE-QA-cl1/host@EXAMPLE.COM, the result will isbe joe-qa-upper If the source string is joe_user/host@EXAMPLE.COM, the result will isbe joe_user If the source string is JOE_USER/host@EXAMPLE.COM, the result will isbe joe_use |
However, it must be noted that this does not affect how pattern matches on input and therefore that will still be case-sensitive.
Compatibility, Deprecation, and Migration Plan
This is an extension to the existing sasl.kerberos.principal.to.local.rules format and there will be no impact on existing users.
Rejected Alternatives
...
.