[jira] [Created] (HTTPCLIENT-1319) InetAddressUtils.isIPv6HexCompressedAddress does not detect excess (or insufficient) groups

["Sebb (JIRA)" <ji...@apache.org>]

Sebb created HTTPCLIENT-1319:
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             Summary: InetAddressUtils.isIPv6HexCompressedAddress does not detect excess (or insufficient) groups
                 Key: HTTPCLIENT-1319
                 URL: https://issues.apache.org/jira/browse/HTTPCLIENT-1319
             Project: HttpComponents HttpClient
          Issue Type: Bug
    Affects Versions: 4.3 Alpha1
            Reporter: Sebb
            Priority: Minor


The IPV6 compressed format regex allows 0 or more hex groups before or after the ::.

This does not detect too many groups (there should be at most 7 surrounding groups in total).
It also allows no groups, i.e "::" which is not permitted AFAIK.

The first issue could be detected by counting the number of ':' characters in the string. 
There should be no more than 7 colons.
The empty group could be detected by checking the length of the string - it must be at least 3 characters.
That should probably be tested first as it is relatively cheap.

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