Unable to decode incoming request

Ryan Suarez ryan.suarez at sheridancollege.ca
Tue Jul 16 12:02:20 EDT 2019


Thanks Peter/Chris,

I'll notify the SP of their bug.

regards,
Ryan


On Tue, 2019-07-16 at 10:51 -0500, Christopher Bongaarts wrote:
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> 
> 
> This looks suspiciously similar to a case we ran into yesterday; from
> what I gather, whatever SP software the vendor is using consumes SAML
> metadata, but blindly grabs the first SSO endpoint it sees instead of
> the one it plans to use (SAML2 HTTP-Redirect).
> 
> On 7/16/2019 10:45 AM, Peter Schober wrote:
> > * Ryan Suarez <ryan.suarez at sheridancollege.ca> [2019-07-16 17:33]:
> > > POST https://my.idp.ca/idp/profile/Shibboleth/SSO
> > 
> > That's your endpoint for proprietary "Shibboleth" protocol requests
> > under SAML1.
> > 
> > > <saml2p:AuthnRequest
> > > Destination="https://my.idp.ca/idp/profile/Shibboleth/SSO"
> > > ForceAuthn="false" ID="LI_qd47rn684941iui6hebvqmdqc4"
> > > IsPassive="false" IssueInstant="2019-07-16T15:18:29.733Z"
> > > ProtocolBinding="urn:oasis:names:tc:SAML:2.0:bindings:HTTP-POST"
> > > Version="2.0" xmlns:saml2p="urn:oasis:names:tc:SAML:2.0:protocol"
> > > >
> > > <saml2:Issuer
> > > xmlns:saml2="urn:oasis:names:tc:SAML:2.0:assertion">
> > > https://some.sp.com/someEndPoint/ABEAAAAAAAAirCEAAAAAAuNRbAHzAzyYcMFFTC97fZ9C4TfaBxvDtg</saml2:Issuer>
> > > ;
> > > <saml2p:NameIDPolicy AllowCreate="true" /> </saml2p:AuthnRequest>
> > 
> > But the authentication request is using the SAML 2.0 protocol.
> > I.e., the SP is configured with the wrong endpoint for your IDP.
> > 
> > -peter
> 
> --
> %%  Christopher A. Bongaarts   %%  cab at umn.edu          %%
> %%  OIT - Identity Management  %%  http://umn.edu/~cab  %%
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