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From "Oleg Kalnichevski (JIRA)" <j...@apache.org>
Subject [jira] Resolved: (HTTPCLIENT-617) Hostname verification: turn off wildcards when CN is an IP address
Date Thu, 11 Oct 2007 09:20:50 GMT

     [ https://issues.apache.org/jira/browse/HTTPCLIENT-617?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel

Oleg Kalnichevski resolved HTTPCLIENT-617.

    Resolution: Fixed

Patch checked in. Many thanks, Julius. 

Test cases would be very welcome, as always.


> Hostname verification:  turn off wildcards when CN is an IP address
> -------------------------------------------------------------------
>                 Key: HTTPCLIENT-617
>                 URL: https://issues.apache.org/jira/browse/HTTPCLIENT-617
>             Project: HttpComponents HttpClient
>          Issue Type: Bug
>          Components: HttpConn
>    Affects Versions: Snapshot
>            Reporter: Julius Davies
>            Priority: Minor
>             Fix For: 4.0 Alpha 2
>         Attachments: guard_against_ip4_wildcard.patch
> Hostname verification:   turn off wildcards when CN is an IP address.  This is a further
improvement on HTTPCLIENT-613 and HTTPCLIENT-614.
> Example - don't allow:
> CN=*.114.102.2
> I'm thinking of grabbing the substring following the final dot, and running it through
"Integer.parseInt()".  If the NumberFormatException isn't thrown (so Integer.parseInt() actually
worked!), then I'll turn off wildcard matching.  Notice that this won't be a problem with
IP6 addresses, since they don't use dots.  It's only a problem with IP4, where the meaning
of the dots clashes with dots in domain names.
> Note:  when I turn off wildcard matching, I still attempt an exact match with the hostname.
 If through some weird mechanism the client is actually able to use a hostname such as "https://*.114.102.2/",
then they will be okay if that's what the certificate on the server contains.

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