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<img id="email-avatar" src="https://issues.shibboleth.net/jira/secure/useravatar?ownerId=ian%40iay.org.uk&avatarId=10125" alt="" height="48" width="48" border="0" align="left" style="padding:0;margin: 0 16px 16px 0;" />
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<a class="user-hover" rel="ian@iay.org.uk" id="email_ian@iay.org.uk" href="https://issues.shibboleth.net/jira/secure/ViewProfile.jspa?name=ian%40iay.org.uk" style="color:#326ca6;">Ian Young</a>
commented on <img src="https://issues.shibboleth.net/jira/images/icons/issuetypes/improvement.png" height="16" width="16" border="0" align="absmiddle" alt="Improvement"> <a style='color:#326ca6;text-decoration:none;' href='https://issues.shibboleth.net/jira/browse/CPPXT-101'>CPPXT-101</a>
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<a style='color:#326ca6;text-decoration:none;' href='https://issues.shibboleth.net/jira/browse/CPPXT-101'><strong>Disable SSLv3 by default in SOAP client</strong></a>
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<div class="comment-block" style="background-color:#edf5ff;border:1px solid #dddddd;color:#000000;padding:12px;"><blockquote>
<p>Ian, is it unacceptable to disable SSL3 entirely, or does this need to be an option?</p></blockquote>
<p>I think it's acceptable to disable the SSLv3 <b>protocol</b> entirely. The only circumstances in which that would cause an issue would be an IdP which supported back-channel queries but did not support TLSv1.0, which seems like an implausible combination even for quite old IdPs.</p>
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<p>I also added !SSLv3 to the cipher list, but that is controllable (and I'll expose an explicit option for that in a future minor rev).</p></blockquote>
<p>It's my recollection that SSLv3 and TLSv1.0 share a list of cipher suites, so saying <tt>!SSLv3</tt> <b>in the cipher suite list</b> also disables TLSv1.0 unintentionally. So, that would be bad as it would require IdPs to support TLSv1.1 or TLSv1.2 which isn't broadly the case yet.</p>
<p>I did a quick search and found this:</p>
<p><a href="http://security.stackexchange.com/questions/70832/why-doesnt-the-tls-protocol-work-without-the-sslv3-ciphersuites" class="external-link">http://security.stackexchange.com/questions/70832/why-doesnt-the-tls-protocol-work-without-the-sslv3-ciphersuites</a></p>
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