Class: Onelogin::Saml::Authrequest

Inherits:
Object
  • Object
show all
Defined in:
lib/onelogin/ruby-saml-bm/authrequest.rb

Instance Method Summary collapse

Instance Method Details

#create(settings, params = {}) ⇒ Object 



12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
 
# File 'lib/onelogin/ruby-saml-bm/authrequest.rb', line 12

def create(settings, params = {})
  request_doc = create_authentication_xml_doc(settings)

  request = ""
  request_doc.write(request)

  Logging.debug "Created AuthnRequest: #{request}"

  deflated_request  = Zlib::Deflate.deflate(request, 9)[2..-5]
  base64_request    = Base64.encode64(deflated_request)
  encoded_request   = CGI.escape(base64_request)
  params_prefix     = (settings.idp_sso_target_url =~ /\?/) ? '&' : '?'
  request_params    = "#{params_prefix}SAMLRequest=#{encoded_request}"

  params.each_pair do |key, value|
    if key == "back_url"
      request_params << "&RelayState=#{CGI.escape(value.to_s)}"
    end
  end

  settings.idp_sso_target_url + request_params
end

#create_authentication_xml_doc(settings) ⇒ Object 



35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
 
# File 'lib/onelogin/ruby-saml-bm/authrequest.rb', line 35

def create_authentication_xml_doc(settings)
  uuid = "_" + UUID.new.generate
  time = Time.now.utc.strftime("%Y-%m-%dT%H:%M:%SZ")
  # Create AuthnRequest root element using REXML 
  request_doc = REXML::Document.new

  root = request_doc.add_element "samlp:AuthnRequest", { "xmlns:samlp" => "urn:oasis:names:tc:SAML:2.0:protocol" }
  root.attributes['ID'] = uuid
  root.attributes['IssueInstant'] = time
  root.attributes['Version'] = "2.0"

  # Conditionally defined elements based on settings
  if settings.assertion_consumer_service_url != nil
    root.attributes["AssertionConsumerServiceURL"] = settings.assertion_consumer_service_url
  end
  if settings.issuer != nil
    issuer = root.add_element "saml:Issuer", { "xmlns:saml" => "urn:oasis:names:tc:SAML:2.0:assertion" }
    issuer.text = settings.issuer
  end
  if settings.name_identifier_format != nil
    root.add_element "samlp:NameIDPolicy", { 
        "xmlns:samlp" => "urn:oasis:names:tc:SAML:2.0:protocol",
        # Might want to make AllowCreate a setting?
        "AllowCreate" => "true",
        "Format" => settings.name_identifier_format
    }
  end

  # BUG fix here -- if an authn_context is defined, add the tags with an "exact"
  # match required for authentication to succeed.  If this is not defined, 
  # the IdP will choose default rules for authentication.  (Shibboleth IdP)
  if settings.authn_context != nil
    requested_context = root.add_element "samlp:RequestedAuthnContext", { 
      "xmlns:samlp" => "urn:oasis:names:tc:SAML:2.0:protocol",
      "Comparison" => "exact",
    }
    class_ref = requested_context.add_element "saml:AuthnContextClassRef", { 
      "xmlns:saml" => "urn:oasis:names:tc:SAML:2.0:assertion",
    }
    class_ref.text = settings.authn_context
  end
  request_doc
end