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#email-avatar { margin: 1px 8px 8px 0 !important; padding: 0 !important; }
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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>
created <img src="https://issues.shibboleth.net/jira/images/icons/issuetypes/bug.png" height="16" width="16" border="0" align="absmiddle" alt="Bug"> <a style='color:#326ca6;text-decoration:none;' href='https://issues.shibboleth.net/jira/browse/IDP-602'>IDP-602</a>
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<a style='color:#326ca6;text-decoration:none;' href='https://issues.shibboleth.net/jira/browse/IDP-602'><strong>authentication context class default is unexpected</strong></a>
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<strong style="font-weight:normal;color:#505050;">Issue Type:</strong>
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<img src="https://issues.shibboleth.net/jira/images/icons/issuetypes/bug.png" height="16" width="16" border="0" align="absmiddle" alt="Bug"> Bug
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<strong style="font-weight:normal;color:#505050;">Affects Versions:</strong>
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3.0.0 </td>
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<strong style="font-weight:normal;color:#505050;">Assignee:</strong>
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<a class="user-hover" rel="cantor.2@osu.edu" id="email_cantor.2@osu.edu" href="https://issues.shibboleth.net/jira/secure/ViewProfile.jspa?name=cantor.2%40osu.edu" style="color:#326ca6;">Scott Cantor</a>
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<strong style="font-weight:normal;color:#505050;">Components:</strong>
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Authentication </td>
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<strong style="font-weight:normal;color:#505050;">Created:</strong>
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11/Feb/15 12:43 PM
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<strong style="font-weight:normal;color:#505050;">Description:</strong>
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<p style='margin-top:0;margin-bottom:10px;'>In SAML 2, in the absence of a specific context class being requested by the SP, the V3.0.0 IdP uses <tt>urn:oasis:names:tc:SAML:2.0:ac:classes:Password</tt>.</p>
<p style='margin-top:0;margin-bottom:10px;'>After discussion with Scott, this does not appear to be a default in the sense of a predictable and documented value. Instead, it's an arbitrary element extracted from a <tt>Set</tt> of compatible values. This means that at least in principle that a different value (in particular, <tt>urn:oasis:names:tc:SAML:2.0:ac:classes:PasswordProtectedTransport</tt>) might be used if the implementation details of that <tt>Set</tt> changed. This potential seems undesirable.</p>
<p style='margin-top:0;margin-bottom:10px;'>It is possible to set the default context class per-profile to achieve particular results, which would override this implicit not-quite-default. So people who care about this and aren't happy with the current behaviour have a way to get what they want.</p>
<p style='margin-top:0;margin-bottom:10px;'>However, I think that:</p>
<ul>
<li>It would be better for us to have a stable and documented default than to have one which is not under out control might change without warning</li>
</ul>
<ul>
<li>It would be nice for that default to be available as an IdP property associated with SAML2 in general, so that it can be changed for all profiles in a single place</li>
</ul>
<ul>
<li>It would make sense for the default default to be <tt>urn:oasis:names:tc:SAML:2.0:ac:classes:PasswordProtectedTransport</tt> as that's what <b>every</b> IdP should be using</li>
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<strong style="font-weight:normal;color:#505050;">Project:</strong>
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<a style="color:#326ca6;" href="https://issues.shibboleth.net/jira/browse/IDP">Identity Provider</a>
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<strong style="font-weight:normal;color:#505050;">Priority:</strong>
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<img src="https://issues.shibboleth.net/jira/images/icons/priorities/major.png" height="16" width="16" border="0" align="absmiddle" alt="Major"> Major
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<strong style="font-weight:normal;color:#505050;">Reporter:</strong>
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<td style="color:#000000;font-family:Arial,FreeSans,Helvetica,sans-serif;font-size:12px;padding:0 0 10px 0;width:100%;">
<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>
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