This page describes the differences between SURFconext and SURFsecureID that are relevant for a SAML service provider (SP) that is migrating from SURFconext to the SURFsecureID gateway, or that is using both simultaneously.
Note that this is only relevant if you connect to the SURFsecureID gateway directly because you need advanced features. Normally, SP's that want to use SURFsecureID can just interfacce with SURFconext.
SURFconext (engine.surfconext.nl) and SURFsecureID (sa-gw.surfconext.nl) are both SAML proxies. The image below shows how SURFconext and SURFsecureID relate to each other.
Your SP connects to the IdP side of the proxy. An authentication to SURFsecureID (route 1) will pass though SURFconext. This means that SURFconext functionality like consent, authorization, attribute aggregation functions just like a direct authentication to SURFconext (route 2).
A service that uses SURFsecureID directly (route 1 in the image below) thus can continue to use SURFconext for authentication (route 2 in the image below). It is your SP that, for each authentication, decides which route it wants to use. The SP will receive the same attributes and user identifiers regardless of the route it takes. To get strong authentication your SP must authenticate to SURFsecureID.
If your SP trusts multiple IdPs (e.g. SURFconext IdP and the SURFsecureID IdP), your SP must always verify from which IdP (the
Issuer) it received the
SAMLResponse. If your SAML library supports the IdP initiated flow (a.k.a unsolicited assertions), your SP could receive, and accept as valid, a
SAMLResponse from any trusted IdP at any time.
SURFsecureID and OpenID Connect
Please note that SURFsecureID does not yet support OpenID Connect whereas SURFconext does. If you must use OpenID Connect, using an OpenID Connect - SAML proxy (like SaToSa) may be an option.
Because the SURFsecureID proxy is a separate SAML IdP from the normal SURFconext, it has different SAML 2.0 metadata. The EntityID, SAML signing certificate and Single Sign On Location are all different from the normal SURFconext.
This means that some metadata related features are unavailable when using the SURFsecureID gateway:
- IdP selection through metadata (transparent metadata, Dutch scoping)
The attributes you receive from SURFsecureID come from the SURFconext. SURFsecureID requires that your SP receives the eduPersonTargetedID (EPTI) attribute. If this attribute is not present, the authentication will fail at the SURFsecureID gateway.
eduPersonTargetedID (EPTI) is required
Selecting a binding using the
AssertionConsumerServiceIndex attribute is not supported.
Single Sign on for the second factor is not provided: for each authentication request with a LoA > 1 the user must always authenticate using his second factor.
ForceAuthn to true may force a re-authentication of the user at the institutional IdP for the first factor, but this cannot be guaranteed.
No SessionIndex in the AuthnStatement
SessionIndex in the SAML Response returned to the SP. More information (see at line 1107).
IdP initiated login
SURFsecureID does not support IdP initiated login (IdP-geïnitieerde login).
Because your SP can still use the SURFconext, you could first authenticate the user there and then authenticate the user at SURFsecureID. Because the user has SSO at the IdP, and SURFconext remembers the selected IdP the user will not get a WAYF (IdP selection screen) and does not need to reauthenticate at the IdP.
Scoping using IDPList
Selecting IdP(s) by adding a
IDPList in the
Scoping element in a
AuthnRequest is not supported.
Because your SP can still use the normal SURFconext, you could first authenticate the user there and then authenticate the user at SURFsecureID. Because the user has SSO at the IdP, and SURFconext remembers the selected IdP the user wil not get a WAYF (IdP selection screen) and does not need to reauthenticate at the IdP.
AuthenticationContext in the Assertion
When authentication fails, it is generally because the user:
- cancels authentication during verification of the second factor or
- does not have a suitable second factor identification
The SURFsecureID gateway will send a SAML Response to the SP about the failure. The SP should be ready to handle the response. The response contains non-success
- First level
with second level StatusCode
urn:oasis:names:tc:SAML:2.0:status:AuthnFailed: user canceled the authentication.