I need a clarification about the terminology used in SAML2.0. I want to know if by "assertions" we mean a particular subcategory of SAML2.0 messages
or if we mean ALL SAML2.0 messages.
A SAML Assertion is an XML document that represents a set of claims (i.e. name/value pairs) about a user asserted by an Identity Provider. A SAML Assertion is not a SAML message itself, but it is contained in a SAML Response message. Apart from that there are other SAML messages such as SAML Requests, Logout Requests and Logout Responses that don't contain Assertions.
Related
I have custom policies setup within our Azure AD B2C tenant to setup a SAML based signin SP initiated flow. On receipt of the response from the third party IDP I get the exception "The response has an invalid relay cookie".
I believe this is because the IDP's response is missing the InResponseTo property. Having spoken to said IDP, they are not able to send back the InResponseTo property in their response.
Is there a way to either remove the InResponseTo property from our initial request, OR is it possible to disable checking the InResponseTo attribute on receipt of the response?
I've successfully run a signin using the same custom policies in B2C, but using https://samltest.id/start-sp-test/ as the IDP instead, and can see the InResponseTo property returned in the response from here. So this is the only thing I have been able to identify as the a possible cause.
I know this is bad practice / a security flaw, but we are trying to prove we can get the identity flow working with this third party, with a view this will be fixed at a later date.
We are implementing SAML integration and I am the service provider and my identity provider is asking me to send "SAML Consumer URL" and "RelayState"
I would need help to understand what is SAML consumer URL & RelayState and how do I get/generate it for my application.
Thank you for your time and help!
TLDR, AssertionConsumerUrl (ACS) endpoint is SAML protocol endpoint, RelayState is like cross-domain cookie, used to coordinate messages and actions of IdPs and SPs.
In 5.1.Web Browser SSO Profile of SAML 2.0 Technical Review, it will give you a general understanding of how the flow goes.
Down to the SSO implementation, for example Shibboleth, this FlowAndConfig doc details the SSO flow pretty well.
In 2. SP Determines IdP and Issues Authentication Request:
Cookie Set by SP
During this step, the SP will preserve the original
resource requested by the browser using a "relay state" mechanism,
which is configured by a relayState property on the <SessionInitiator>
element. The default mechanism does not rely on a cookie any longer,
but many systems do, and send a state management cookie containing the
resource URL to the client along with the request prepared for the IdP
or DS/WAYF.
In 5. Back to the SP:
The browser delivers the response from the IdP to an Assertion Consumer Service endpoint at the SP.
relay state info returned from IdP to SP
Cookie Read by SP
The "relay state" information returned by the IdP, if any, will have
been created by the SP and if using a cookie, will point to a
specially named cookie that should accompany the authentication
response supplied to the ACS endpoint in this step. This is the cookie
set in Step 2 above. If this cookie is missing (or if no relay state
exists at all), the associated application's homeURL property is
substituted as a fall back.
Also, Shibboleth has some wiki for those two terms as well.
AssertionConsumerService concept
RelayState concept
Hope it helps!
Using WSO2 5.1.0. Needs to send SAML assertion like firstName, lastName from WSO2 as IDP to SP. Refer Configuration. User profile do have first name and last name values.
Restarted WSO2, no error in logs. But I don't receive these values in SAML response sent from WSO2 to my Service porvider.
For this, in your Service Provider's SAML Configuration, you need to make sure following two checkboxes are selected.
Enable Attribute Profile
Include Attributes in the Response Always
Then, inside the Claim Configuration section of the Service Provider configuration, you need to add the particular claims you need to receive as Requested Claims. Then these claims will be included in SAML response.
If you want the claims to have a different key name, you can define a custom claim dialect there and provide your own key names for claims.
I am implementing single sign on with multiple SPs. Here is my basic understanding:
1) Browser(User) requests resource from Service Provider (SP).
2) SP Redirects (with SAML Request) to Identity Provider (IdP).
3) Since it is first login, User gives the (IdP) his/her valid credentials.
4) IdP then redirects Browser (with SAML Response which includes SAML token) to the SP page.
Now let's say I have Service Provider A and Service Provider B. A user has completed the step about for Service Provider A. From service provider A (salesforce.com in my scenario), I have written a server-side method which instantiates a callout to an endpoint on Service Provider B. Is it possible to re-use the SAML assertion in this case? I.e. will service provider B trust the backend method?
You would have to customize Service Provider B in order for it to accept, understand and interpret the Assertion obtained by Service Provider A. It would certainly not work out-of-the-box.
The SAML Assertion included in the SAML Response to Service Provider A contains pieces of data which correlate it with the original SAML Request and define recipients of the message (for example using elements SubjectConfirmationData and Audience). The Service Provider B would need to ignore values in these fields, as it is actually not the indented recipient of the Assertion.
The problem of how to broker trust between two machines where user's identity is asserted by an identity provider can be solved with multiple standard approaches. One is to use a Session Token Service (based on WS-Trust) which defines how to request and issue tokens to 3rd party services. Another is to use OAuth 2.0. You could of course also simply authenticate Service Provider A to Service Provider B using a custom scheme with a password, HMAC, ...
The short answer - no if Service Provider B is implemented as a standard SAML 2.0 SP.
SAML 2.0 assertions are "targeted" and signed. They have a specified audience and a recipient URL. You cannot change them without breaking the signature.
The assertion received by SP A contains the name of SP A as audience and the ACS end point of SP A as recipient URL. Such an assertion will not be accepted by SP B.
What prevents you from just calling SP B in a standard way and let it initiate its own SAML 2.0 flow? Another option would be to perform an IDP-initiated SSO flow for SP B. Not all IDP implementations support it though.
I got SAML assertion from TrustAuthorityClient API. with below Public API code
securityToken = client.getSecurityToken("default", endpointURL, mexEndpointURL,
(java.lang.Object)ssoToken, SecurityMechanism.STS_SECURITY_URI,
(getServletConfig()).getServletContext());
But this is created with SunSTS.
When I test this Assertion to retrieve access token from SalseForce. it gives me invalid Assertion.
Is there any way retrieve SAML response from OpenAM for SalesForce?
When I test IDP initiates SSO with SalesForce. In Debug log I can see SAML Response is created for SSO.
How should I retrieve this SAML response from OpenAM?
You may need to grab the SAML Response via JavaScript at the front end. The full response will be in a SAMLResponse object after SSO, so your Assertion Consumer Service URL (SP SSO URL) that would receive this would need to check for that parameter, save it and somehow submit to SFDC for OAuth token exchange. Alternatively, take the Assertion from SunSTS and make your SAMLP Response wrapper yourself.
I believe this is due to SFDC implementing an earlier draft of the SAML 2.0 Bearer Assertion Profiles for OAuth 2.0 (see: https://datatracker.ietf.org/doc/html/draft-ietf-oauth-saml2-bearer-10).
The latest draft of that spec does not require the Response wrapper - likely just the Assertion itself from SunSTS will work, provided SFDC updates to support it.