I am trying to integrate our ADFS login with our application which uses ActiveAdmin in combination with Devise. I succesfully added omniauth-saml for that purpose. The application now redirects to ADFS, the login succeeds but than fails on the callback. I get the error Invalid ticket.
When I try to look into the response on the server in the omniauth-saml lib I can see it says: @document=<UNDEFINED> ... </> and @decrypted_document=<UNDEFINED> ... </>
The initializers/devise.rb reads:
config.omniauth :saml,
assertion_consumer_service_url: 'https://my_server/admin/auth/saml/callback',
issuer: 'https://my_server/',
authn_context: 'urn:oasis:names:tc:SAML:2.0:ac:classes:PasswordProtectedTransport',
idp_sso_target_url: 'https://my_adfs_server/adfs/ls/',
assertion_consumer_service_binding: 'urn:oasis:names:tc:SAML:2.0:bindings:HTTP-POST',
assertion_consumer_logout_service_binding: 'urn:oasis:names:tc:SAML:2.0:bindings:HTTP-Redirect',
idp_sso_target_url_runtime_params: {original_request_param: :mapped_idp_param},
name_identifier_format: 'urn:oasis:names:tc:SAML:1.1:nameid-format:emailAddress',
idp_cert: idp_certificate,
request_attributes: {},
attribute_statements: {email: ['http://schemas.xmlsoap.org/ws/2005/05/identity/claims/emailaddress'],
name: ['http://schemas.xmlsoap.org/ws/2005/05/identity/claims/name'],
first_name: ['http://schemas.xmlsoap.org/ws/2005/05/identity/claims/givenname'],
last_name: ['http://schemas.xmlsoap.org/ws/2005/05/identity/claims/surname']},
private_key: sp_key,
certificate: sp_certificate,
security: {authn_requests_signed: true,
logout_requests_signed: true,
logout_responses_signed: true,
metadata_signed: true,
digest_method: XMLSecurity::Document::SHA1,
signature_method: XMLSecurity::Document::RSA_SHA1,
embed_sign: false}
How can I solve this?
Addition: It appears that REXML::Document is unable to decrypt the Cypher inside of the SAML response. It fails to do so without errorring. When I try to do it myself by using https://www.samltool.com/decrypt.php I see no problems with it though.
I picked the wrong certificate from ADFS metadata xml. Need to pick the signing, not the encryption certificate.
Found this by using https://www.samltool.com/validate_response.php for debugging.