Class: SAML::AuthResponse

Inherits:
Object
  • Object
show all
Includes:
Onelogin::Saml::Codeing
Defined in:
lib/saml/auth_response.rb

Instance Attribute Summary collapse

Instance Method Summary collapse

Constructor Details

#initialize(request, logger = nil) ⇒ AuthResponse

Returns a new instance of AuthResponse.

Raises:

  • (ArgumentError) 


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# File 'lib/saml/auth_response.rb', line 9

def initialize(request, logger = nil)
  raise ArgumentError.new("Response cannot be nil") if request.nil?
  self.logger = logger || ActiveRecord::Base.logger
  self.request = inflate(decode(request))
  self.document = Nokogiri::XML(self.request)
end

Instance Attribute Details

#document ⇒ Object

Returns the value of attribute document.



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# File 'lib/saml/auth_response.rb', line 6

def document
  @document
end

#logger ⇒ Object

Returns the value of attribute logger.



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# File 'lib/saml/auth_response.rb', line 6

def logger
  @logger
end

#request ⇒ Object

Returns the value of attribute request.



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# File 'lib/saml/auth_response.rb', line 6

def request
  @request
end

Instance Method Details

#build_assertion_content(name_id, assert_id, time_line, sign = nil) ⇒ Object 



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# File 'lib/saml/auth_response.rb', line 88

def build_assertion_content(name_id, assert_id, time_line, sign =nil)
  time_and_ten = xml_time_format(time_line + 10.minutes)
  time = xml_time_format(time_line)

  xml = Builder::XmlMarkup.new

  xml.tag!('saml:Assertion', {"xmlns:saml"=>"urn:oasis:names:tc:SAML:2.0:assertion", "ID"=>assert_id, "Version"=>"2.0", "IssueInstant"=> time}) do
    xml.tag!("saml:Issuer", get_idp_issuer)

    xml << sign if sign.present?

    xml.tag! "saml:Subject" do
      xml.tag!("saml:NameID", {"Format"=>"urn:oasis:names:tc:SAML:2.0:nameid-format:transient"}, name_id)
      xml.tag!("saml:SubjectConfirmation", {"Method" => "urn:oasis:names:tc:SAML:2.0:cm:bearer"}) do
        xml.tag!("saml:SubjectConfirmationData", {"InResponseTo" => get_sp_response_to, "Recipient" => get_sp_destination, "NotOnOrAfter" => time_and_ten})
      end
    end

#        xml.tag!("saml:Conditions", {"NotBefore" => time, "NotOnOrAfter" => time_and_ten}) do
#          xml.tag!("saml:AudienceRestriction") do
#            xml.tag!("saml:Audience", get_sp_audience)
#          end
#        end

    xml.tag!("saml:AuthnStatement", {"AuthnInstant" => time, "SessionIndex" => assert_id}) do
      xml.tag!("saml:AuthnContext") do
        xml.tag!("saml:AuthnContextClassRef", "urn:oasis:names:tc:SAML:2.0:ac:classes:PasswordProtectedTransport")
      end
    end
  end
  xml.target!
end

#create(name_id) ⇒ Object 



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# File 'lib/saml/auth_response.rb', line 56

def create(name_id)
  time_line = Time.now.utc
  request_id = UUID.new.generate
  assert_id = UUID.new.generate

  time = xml_time_format(time_line)
  assertion = build_assertion_content(name_id, assert_id, time_line)

#      assertion_parsed = Nokogiri::XML(assertion)
#      assertion_parsed.xpath("//saml:Assertion//saml:Issuer").first.add_next_sibling(make_signature(assertion, assert_id))

  response = Builder::XmlMarkup.new
  response.tag!('samlp:Response', {"xmlns:samlp" => "urn:oasis:names:tc:SAML:2.0:protocol",
                                   "xmlns:saml" => "urn:oasis:names:tc:SAML:2.0:assertion",
                                   "xmlns:ds" => "http://www.w3.org/2000/09/xmldsig#",
                                   "ID" => request_id,
                                   "Version" => "2.0",
                                   "InResponseTo" => get_sp_response_to,
                                   "IssueInstant" => time,
                                   "Destination" => get_sp_destination}) do
    response.tag!("saml:Issuer", get_idp_issuer)
    response.tag!("samlp:Status") do
      response.tag!("samlp:StatusCode", "Value" => "urn:oasis:names:tc:SAML:2.0:status:Success")
    end
    response << build_assertion_content(name_id, assert_id, time_line, make_signature(assertion, assert_id))
    #todo if insert node this way - need to canonicalize. nokogiri 1.4.4 has no possibility to do it. only it's branch can do it:(
#        response << assertion_parsed.xpath("//saml:Assertion").canonicalize.to_s
  end
  response.target!
end

#get_idp_issuer ⇒ Object 



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# File 'lib/saml/auth_response.rb', line 24

def get_idp_issuer
  Settings.host
end

#get_sp_destination ⇒ Object 



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# File 'lib/saml/auth_response.rb', line 20

def get_sp_destination
  Settings.sso.sp_destination
end

#get_sp_response_to ⇒ Object 



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# File 'lib/saml/auth_response.rb', line 16

def get_sp_response_to
  document.xpath("//samlp:AuthnRequest").first["ID"]
end

#make_signature(assertion, assert_id) ⇒ Object 



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# File 'lib/saml/auth_response.rb', line 121

def make_signature(assertion, assert_id)
  certificate = File.read("#{Rails.root}/config/cert/#{Rails.env}/idp.ignite.com.crt")
#      certificate = File.read("#{Rails.root}/config/cert/development/IdpCertificate.cer")
  certificate.gsub!("-----BEGIN CERTIFICATE-----", "")
  certificate.gsub!("-----END CERTIFICATE-----", "")

  sign_info_xml_builder = Builder::XmlMarkup.new
  sign_info_xml_builder.tag!("ds:SignedInfo", {"xmlns:ds"=>"http://www.w3.org/2000/09/xmldsig#"}) do
    sign_info_xml_builder.tag!("ds:CanonicalizationMethod", {"Algorithm"=>"http://www.w3.org/2001/10/xml-exc-c14n#"})
    sign_info_xml_builder.tag!("ds:SignatureMethod", {"Algorithm"=>"http://www.w3.org/2000/09/xmldsig#rsa-sha1"})
    sign_info_xml_builder.tag!("ds:Reference", {"URI" => "##{assert_id}"}) do
      sign_info_xml_builder.tag!("ds:Transforms") do
        sign_info_xml_builder.tag!("ds:Transform", {"Algorithm"=>"http://www.w3.org/2000/09/xmldsig#enveloped-signature"})
        sign_info_xml_builder.tag!("ds:Transform", {"Algorithm"=>"http://www.w3.org/2001/10/xml-exc-c14n#"})
      end
      sign_info_xml_builder.tag!("ds:DigestMethod", {"Algorithm"=>"http://www.w3.org/2000/09/xmldsig#sha1"})
      sign_info_xml_builder.tag!("ds:DigestValue", {"URI" => assert_id}, signature_digest_value(assertion))
    end
  end
  sign_info_xml = sign_info_xml_builder.target!
  s_value = signature_sign_value(sign_info_xml)
  xml = Builder::XmlMarkup.new
  xml.tag!('ds:Signature', {"xmlns:ds" => "http://www.w3.org/2000/09/xmldsig#"}) do
    xml << sign_info_xml
    xml.tag!("ds:SignatureValue", {"xmlns:ds" => "http://www.w3.org/2000/09/xmldsig#"}, s_value)
    xml.tag!('ds:KeyInfo') do
      xml.tag!('ds:X509Data') do
        xml.tag!('ds:X509Certificate', certificate)
      end
    end
  end
  xml.target!
end

#response_url(name_id, params = {}) ⇒ Object 



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# File 'lib/saml/auth_response.rb', line 39

def response_url(name_id, params={})
  prepared_result = create(name_id)
  base64_request = encode(prepared_result)
#      deflated_request = deflate(create(name_id))
#      base64_request = encode(deflated_request)
  base64_request.gsub!(/\s/,"")
#      encoded_response = escape(base64_request)
#
#      encoded_response
##      request_params = "?SAMLResponse=" + encoded_response
#
#      params.each_pair do |key, value|
#        request_params << "&#{key}=#{escape(value.to_s)}"
#      end
#      Settings.sso.sp_destination+ request_params
end

#signature_digest_value(xml) ⇒ Object 



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# File 'lib/saml/auth_response.rb', line 169

def signature_digest_value(xml)
  document = XMLSecurity::SignedDocument.new(xml)
  canoner = XML::Util::XmlCanonicalizer.new(false, true)
  canon_hashed_element = canoner.canonicalize(document)
  Base64.encode64(Digest::SHA1.digest(canon_hashed_element)).chomp
end

#signature_sign_value(xml) ⇒ Object 



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# File 'lib/saml/auth_response.rb', line 156

def signature_sign_value(xml)
  document = XMLSecurity::SignedDocument.new(xml)
  canoner = XML::Util::XmlCanonicalizer.new(false, true)
  signed_info_element = REXML::XPath.first(document, "//ds:SignedInfo", {"ds"=>"http://www.w3.org/2000/09/xmldsig#"})
  canon_string = canoner.canonicalize(signed_info_element)
#      private_key = OpenSSL::PKey::RSA.new(File.read("#{Rails.root}/config/cert/#{Rails.env}/idp.ignite.com.key"))
  #private_key = OpenSSL::PKey::RSA.new(File.read("#{Rails.root}/config/cert/development/SPkey.key"))
  private_key = OpenSSL::PKey::RSA.new(File.read("#{Rails.root}/config/cert/development/IgniteKeyDecrypted.key"))

  sig = private_key.sign(OpenSSL::Digest::SHA1.new, canon_string)
  Base64.encode64(sig).chomp
end

#xml_time_format(time) ⇒ Object 



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# File 'lib/saml/auth_response.rb', line 34

def xml_time_format time
  time.strftime("%Y-%m-%dT%H:%M:%SZ")
end