This file is indexed.

/etc/shibboleth/protocols.xml is in shibboleth-sp2-common 2.6.1+dfsg1-2.

This file is owned by root:root, with mode 0o644.

The actual contents of the file can be viewed below.

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<Protocols xmlns="urn:mace:shibboleth:2.0:native:sp:protocols">
  
  <!-- SAML 2.0 -->
  <Protocol id="SAML2">
    <Service id="SSO">
      <Initiator id="SAML2" />
      <Binding id="urn:oasis:names:tc:SAML:2.0:bindings:HTTP-POST" path="/SAML2/POST" />
      <Binding id="urn:oasis:names:tc:SAML:2.0:bindings:HTTP-POST-SimpleSign" path="/SAML2/POST-SimpleSign" />
      <Binding id="urn:oasis:names:tc:SAML:2.0:bindings:HTTP-Artifact" path="/SAML2/Artifact" />
      <Binding id="urn:oasis:names:tc:SAML:2.0:bindings:PAOS" path="/SAML2/ECP" />
    </Service>
    <Service id="Logout">
      <Initiator id="SAML2" />
      <Binding id="urn:oasis:names:tc:SAML:2.0:bindings:SOAP" path="/SLO/SOAP" />
      <Binding id="urn:oasis:names:tc:SAML:2.0:bindings:HTTP-Redirect" path="/SLO/Redirect" />
      <Binding id="urn:oasis:names:tc:SAML:2.0:bindings:HTTP-POST" path="/SLO/POST" />
      <Binding id="urn:oasis:names:tc:SAML:2.0:bindings:HTTP-Artifact" path="/SLO/Artifact" />
    </Service>
    <Service id="NameIDMgmt">
      <Binding id="urn:oasis:names:tc:SAML:2.0:bindings:SOAP" path="/NIM/SOAP" />
      <Binding id="urn:oasis:names:tc:SAML:2.0:bindings:HTTP-Redirect" path="/NIM/Redirect" />
      <Binding id="urn:oasis:names:tc:SAML:2.0:bindings:HTTP-POST" path="/NIM/POST" />
      <Binding id="urn:oasis:names:tc:SAML:2.0:bindings:HTTP-Artifact" path="/NIM/Artifact" />
    </Service>
    <Service id="ArtifactResolution">
      <Binding id="urn:oasis:names:tc:SAML:2.0:bindings:SOAP" path="/Artifact/SOAP" />
    </Service>
  </Protocol>

  <!-- SAML 1.1 and SAML 1.0 -->
  <Protocol id="SAML1">
    <Service id="SSO">
      <Initiator id="Shib1" />
      <Binding id="urn:oasis:names:tc:SAML:1.0:profiles:browser-post" path="/SAML/POST" />
      <Binding id="urn:oasis:names:tc:SAML:1.0:profiles:artifact-01" path="/SAML/Artifact" />
    </Service>
  </Protocol>

  <!-- ADFSv1 / WS-Federation -->
  <Protocol id="ADFS">
    <Service id="SSO">
      <Initiator id="ADFS" />
      <Binding id="http://schemas.xmlsoap.org/ws/2003/07/secext" path="/ADFS" />
    </Service>
    <Service id="Logout">
      <Initiator id="ADFS" />
    </Service>
  </Protocol>

  <!-- Local Logout -->
  <Protocol id="Local">
    <Service id="Logout">
      <Initiator id="Local" />
    </Service>
  </Protocol>
  
</Protocols>