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https://issues.apache.org/jira/browse/HTTPCLIENT-1316?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13571245#comment-13571245
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Sebb commented on HTTPCLIENT-1316:
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I put the code in AbstractVerifier because the format is specifically for
comparisons. It did not seem particularly useful elsewhere.
If it is moved to InetAddressUtils it should probably be renamed to clarify its
purpose, as there might be a need for an RFC5952 version later.
I'm now wondering whether the code should throw IllegalState or log a warning?
Might be too drastic to throw.
> Certificate verification rejects IPv6 addresses which are not String-equal
> --------------------------------------------------------------------------
>
> Key: HTTPCLIENT-1316
> URL: https://issues.apache.org/jira/browse/HTTPCLIENT-1316
> Project: HttpComponents HttpClient
> Issue Type: Bug
> Components: HttpConn
> Affects Versions: 4.2.3
> Reporter: James Livingston
> Fix For: Future
>
> Attachments: HTTPCLIENT-1316.patch
>
>
> org.apache.http.conn.ssl.AbstractVerifier.verify() does not correctly handle
> host name verification when IPv6 addresses are used, as it simply does a
> string equality check when doWildcard is false.
> http://tools.ietf.org/html/rfc5952#section-3.2.5 specifically mentions X.509
> certificates as an example when textual comparison of IPv6 addresses is not
> correct. Examples of incorrect behaviour are with:
> * leading zeroes
> * zero compression
> * case insensitivity
> For example if you have a SSL certificate for the IP address
> 2001:0db8:aaaa:bbbb:cccc:0:0:0001, the alternative representation of
> 2001:db8:AAAA:bbbb:cccc::1 should be accepted as a match.
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