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<td class="text-paragraph-pattern-container mobile-resize-text " style="padding: 0px; border-collapse: collapse; padding: 0 0 10px 0"> <p style="margin: 10px 0 0 0; margin-top: 0">I don't know why we are clearing those there. It's been that way since the original impl in v2 in 2006. I personally can't find anything in the spec that suggests that query params in the supplied endpoint URL are disallowed. I'm speculating that the original implementer might have misinterpreted this text in SAML Bindings 3.4.4.1 line 606-607:</p>
<blockquote style="margin: 10px 0 0 0; border-left: 1px solid #cccccc; color: #707070; margin-left: 19px; padding: 10px 20px">
<p style="margin: 10px 0 0 0; margin-top: 0">... Any other content in the original query string is not included and not signed.</p>
</blockquote> <p style="margin: 10px 0 0 0">However that is in the context of signature generation only, and so means merely that other query string content is <b>not included in the signature</b>, and therefore not signed.</p> <p style="margin: 10px 0 0 0">I'll let Scott weigh in just in case I'm missing something, and to confirm what the SP does. But I think I agree at this point that this is a bug.</p> <p style="margin: 10px 0 0 0">In fixing I think we do need to disallow the query param names which are already reserved for use in this binding, namely:</p> <p style="margin: 10px 0 0 0">SAMLEncoding<br> SAMLRequest<br> SAMLResponse<br> RelayState<br> SigAlg<br> Signature</p> <p style="margin: 10px 0 0 0">So those would be cleared, but any others would be allowed through.</p> </td>
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