EFA Identity Assertion SAML2 Binding

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EFA Identity Assertion SAML2 Binding
EFA Identity Assertion SAML2 Binding
Implementierungsleitfaden
vorgelegt von:
February 2013
Jörg Caumanns, Raik Kuhlisch
Draft
Version: 0.9
Datum: March 2013
Status: xxx
Verfahren: {{{Verfahren}}}
Realm: Flag de.svg Deutschland
Copyright © 2012-2013: HL7 Deutschland


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Hinweise zum Kommentierungsverfahren einschließlich aller Formulare und Kontaktadressen finden Sie auf der Seite "Kommentierung EFAv2.0".

SAML 2.0 Profile for ECR Identity Assertions

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Assertion Element Opt Usage Convention
@Version R MUST be “2.0”
@ID R URN encoded unique identifier (UUID) of the assertion
@IssueInstant R time instant of issuance in UTC
Issuer R address URI that identifies the endpoint of the issuing service
Subject R This element defines the subject confirmation method of the user in order to use the Identity Assertion as a protection token. Moreover, it defines the subject name identifier that accords with the user identity.
NameID R Identifier of the HP encoded as an X.509 subject name, an e-Mail address or as a string value (unspecified format). Only identifiers must be used that can be long-term tracked back to an individual person.
@Format R MUST be urn:oasis:names:tc:SAML:1.1:nameid-format:unspecified

or urn:oasis:names:tc:SAML:1.1:nameid-format:X509SubjectName
or urn:oasis:names:tc:SAML:1.1:nameid-format:emailAddress
For providing an OID as a subject identifier the unspecified format must be used. The OID must be provided as a string encoded in ISO format.

SubjectConfirmation R
@Method R This element MUST hold a URI reference that identifies a protocol to be used to authenticate the subject.[SAML2.0core] The value of this element MUST be set to

urn:oasis:names:tc:SAML:2.0:cm:holder-of-key or
urn:oasis:names:tc:SAML:2.0:cm:bearer
If the bearer method is used, the EFA Identity Assertion SHALL only be exchanged over secure channels with trusted endpoints in order to maintain confidentiality and message integrity.

SubjectConfirmationData R
ds:KeyInfo R The XML Signature [XMLSignature] element MUST embed a cryptographic key that is only held by the user. This can be the user’s public key (ds:KeyValue/ds:RSAKeyValue), the complete user’s X.509 certificate (ds:X509Data/ds:X509Certificate), or an encrypted symmetric key (xenc:EncryptedKey [XMLEncryption]). This symmetric key MUST be encrypted by using the public key of the consumer service’s certificate [eFA PKI 1.2].
Conditions R
@NotBefore R time instant from which the assertion is useable. This condition MUST be assessed by the assertion consumer to proof the validity of the assertion.
@NotOnOrAfter R time instant at which the assertion expires. This condition MUST be assessed by the assertion consumer to proof the validity of the assertion. The maximum validity timespan for an HCP Identity Assertion MUST NOT be more than 4 hours.
AuthnStatement R
@AuthnInstant R time instant of HP authentication in UTC
@SessionNotOnOrAfter O Time instant of the expiration of the session
AuthnContext R
AuthnContextClassRef R A URI reference that specifies the type of authentication that took place (see SAML 2.0).
AttributeStatement R HP identity attributes and permissions (see section below for details)
ds:Signature R Enveloped XML signature of the issuer of the HCP Identity Assertion (see section below for details).

German Profile

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The subject must refer to a health professional. The subject identifier must be provided as an OID. Only the following identitification schemes must be used:

Person Role Scheme Code System OID
Physician Telematik ID
This ID scheme MUST be preferred only if the Telematik ID is recorded within the HBA AUT certificate of the physician. 		not defined yet
Physician ID of the HBA AUT Certificate 1.2.276.0.76.4.75
Physician Lebenslange Arztnummer KV 1.2.276.0.76.4.16
Hospital Staff
Practice Staff 		Any internal identification scheme that guarantees a unique identification within the scope of the identified organization. The <representedOrganization> and an <id> for this organization MUST be recorded. local code system

Assertion Signature

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Every HP Identity Assertion MUST be signed by its issuer. The XML signature MUST be applied by using the saml:Assertion/ds:Signature element as defined below.

Signature Parameter Usage Convention
CanonicalizationMethod SHOULD be http://www.w3.org/2001/10/xml-exc-c14n#
Transformation Enveloped signature transform acc. to section 6.6.4 of [W3C XMLDSig] SHOULD be used (http://www.w3.org/2000/09/xmldsig#enveloped-signature). In addition, exclusive canonicalization SHOULD be defined as transformation (http://www.w3.org/2001/10/xml-exc-c14n#, acc. [W3C XMLDSig] and [W3C XML-EXC 1.0]). As inclusive namespaces other prefixes than the ones defined in EFA Namespaces MUST NOT be used.
SignatureMethod For signing assertions the signature method

http://www.w3.org/2001/04/xmldsig-more#rsa-sha256 or
http://www.w3.org/2000/09/xmldsig#rsa-sha1
SHOULD be used. An assertion consumer MAY reject signatures that use SHA-1 for digesting.

DigestMethod For signing assertions the digest method

http://www.w3.org/2000/09/xmldsig#sha1 or
http://www.w3.org/2001/04/xmlenc#sha256
SHOULD be used. An assertion consumer MAY reject SHA-1 digests.

KeyInfo This element MUST either contain a wsse:SecurityTokenReference element which references the X.509 certificate of the assertion’s issuer by using a subject key identifier OR contain a ds:X509Data element which contains the X.509 certificate of the assertion issuer.

HCP Identity Attributes

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An identity assertion can carry an arbitrary number of attributes on the authenticated entity. Each attribute MUST be encoded using a SAML attribute element.

For ECR the following attribute names and catalogues are defined.

HP Identifier
FriendlyName XSPA Subject
Name urn:oasis:names:tc:xacml:1.0:subject:subject-id
Values Human readable name of the HP
Type String
Optionality Mandatory
Description This attribute MUST contain the full name of the HP.
Structural Role of the HCP
FriendlyName XSPA Role
Name urn:oasis:names:tc:xacml:2.0:subject:role
Values See ASTM E1986-98 (2005). Only the ASTM structural roles “dentist”, “nurse” “pharmacist”, “physician”, “nurse midwife”, “admission clerk”, “ancillary services” and “clinical services” MUST be used.
Type String
Optionality Mandatory
Delegated Rights
FriendlyName OnBehalfOf
Name urn:epsos:names:wp3.4:subject:on-behalf-of
Values See ASTM E1986-98 (2005). Only the ASTM structural roles “dentist”, “pharmacist”, “physician” and “nurse midwife” MUST be used.
Type String
Optionality Mandatory if a structural role of “ancillary services” or “clinical services” is presented. For all other structural roles this attribute is optional
Description If a person is acting on behalf of another person the role of this person MAY be provided with this attribute. If this attribute is included with a HCP identity assertion, the issuer of the assertion MUST be able to track back the delefation to the two natural persons involved. Only valid roles as defined for HCP structural roles MUST be used.
An assertion consumer MAY decide not to accept delegated access rights by just ignoring this attribute.
Healthcare Professional Organisation
FriendlyName XSPA Organization
Name urn:oasis:names:tc:xspa:1.0:subject:organization
Values Name of the Healthcare Professional Organisation
Type String
Optionality Optional
Description This value SHOULD only be provided if different from the point of care (e.g. in cases where a hospital organization runs multiple points of care or where a hospital just provides a professional environment for otherwise independent care providers)
Healthcare Professional Organisation ID
FriendlyName XSPA Organization Id
Name urn:oasis:names:tc:xspa:1.0:subject:organization-id
Values URN encoded OID of the Healthcare Professional Organisation
Type URI
Optionality Mandatory
Purpose of Use
FriendlyName XSPA Purpose of Use
Name urn:oasis:names:tc:xspa:1.0:subject:purposeofuse
Values MUST be TREATMENT
Optionality Optional
Description ECR access is only granted for treatment purposes.
Point of Care
Attribute Name XSPA Locality
Name urn:oasis:names:tc:xspa:1.0:environment:locality
Values String
Optionality Optional
Description Name of the hospital or medical facility where patient care takes place.

ECR regional networks MAY agree on further attributes. Any attributes not listed in this list MAY be ignored by the assertion consumer.

German Extensions

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Speciality of the HP
FriendlyName Clinical Speciality
Name TO BE DEFINED
Values HIER MUSS NOCH DIE PASSENDE KBV SCHLÜSSELTABELLE RAUSGESUCHT WERDEN
Type URI
Optionality Optional
Description Clinical speciality of the HP as expressed in her Health Professional Card (HBA)
Attention icon.svg HBA attributes will only be available with the Telematik-Infrastruktur. Before the final roll-out of the Telematik-Infrastruktur identifiers based on HBA SHOULD NOT be used.

Example Assertion

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 <soap12:Envelope … >
 <soap12:Header … >
  <wsse:Security … > 
   <saml:Assertion xmlns:saml="urn:oasis:names:tc:SAML:2.0:assertion"
                   ID="_2c356d70-1215-42f9-93a0-fc6fab1c966e" 
                   IssueInstant="2009-09-21T12:03:28.788Z" Version="2.0">
   <saml:Issuer>urn:de:berlin:hp:idp</saml:Issuer>
    <ds:Signature xmlns:ds="http://www.w3.org/2000/09/xmldsig#">
     <ds:SignedInfo>
      <ds:CanonicalizationMethod
       Algorithm="http://www.w3.org/2001/10/xml-exc-c14n#" />
       <ds:SignatureMethod Algorithm="http://www.w3.org/2000/09/xmldsig#rsa-sha1" />
       <ds:Reference URI="#urn:uuid:7102AC72154DCFD1F51253534608780">
        <ds:Transforms>
         <ds:Transform 
          Algorithm="http://www.w3.org/2000/09/xmldsig#enveloped-signature" />
         <ds:Transform 
          Algorithm="http://www.w3.org/2001/10/xml-exc-c14n#">
          <ec:InclusiveNamespaces 
           xmlns:ec="http://www.w3.org/2001/10/xml-exc-c14n#" 
           PrefixList="ds saml xs" />
         </ds:Transform>
        </ds:Transforms>
        <ds:DigestMethod Algorithm="http://www.w3.org/2000/09/xmldsig#sha1" />
        <ds:DigestValue>A1LyLvFHRrYaOJ28YVFd3MfKGSI=</ds:DigestValue>
       </ds:Reference>
      </ds:SignedInfo>
      <ds:SignatureValue>cH+lCY … </ds:SignatureValue>
      <ds:KeyInfo>
       <ds:X509Data>
        <ds:X509Certificate> … </ds:X509Certificate>
       </ds:X509Data>
      </ds:KeyInfo>
     </ds:Signature>
     <saml:Subject>
      <saml:NameID 
       Format="urn:oasis:names:tc:SAML:1.1:nameid-format:X509SubjectName">
       ...
      </saml:NameID>
      <saml:SubjectConfirmation 
       Method="urn:oasis:names:tc:SAML:2.0:cm:holder-of-key">
       <saml:SubjectConfirmationData>
         <ds:KeyInfo>
           <ds:X509Data>
             <ds:X509Certificate> … </ds:X509Certificate>
           </ds:X509Data>
         </ds:KeyInfo>
        </saml:SubjectConfirmationData/>
      </saml:SubjectConfirmation>
     </saml:Subject>
     <saml:Conditions 
      NotBefore="2012-09-21T12:03:28.788Z" 
      NotOnOrAfter="2012-09-21T16:03:28.788Z">
    </saml:Conditions>
    <saml:AuthnStatement 
     AuthnInstant="2012-09-21T12:03:28.788Z" 
     SessionNotOnOrAfter="2012-09-21T16:03:28.788Z">
     <saml:AuthnContext>
     <saml:AuthnContextClassRef>
      urn:oasis:names:tc:SAML:2.0:ac:classes:X509
     </saml:AuthnContextClassRef>
     </saml:AuthnContext>
    </saml:AuthnStatement>
   <saml:AttributeStatement>
   <saml:Attribute 
    FriendlyName="XSPA Subject" 
    Name="urn:oasis:names:tc:xacml:1.0:subject:subject-id" 
    NameFormat="urn:oasis:names:tc:SAML:2.0:attrname-format:uri">
    <saml:AttributeValue 
     xmlns:xs="http://www.w3.org/2001/XMLSchema" 
     xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" 
     xsi:type="xs:string">Dr. Peter Meier
    </saml:AttributeValue>
   </saml:Attribute>
   <saml:Attribute 
    FriendlyName="XSPA Organization" 
    Name="urn:oasis:names:tc:xspa:1.0:subject:organization" 
    NameFormat="urn:oasis:names:tc:SAML:2.0:attrname-format:uri">
    <saml:AttributeValue 
     xmlns:xs="http://www.w3.org/2001/XMLSchema" 
     xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" 
     xsi:type="xs:string">Kreiskrankenhaus Neustadt
    </saml:AttributeValue>
   </saml:Attribute>
   </saml:Attribute>
   <saml:Attribute 
    FriendlyName="XSPA Role" 
    Name="urn:oasis:names:tc:xacml:2.0:subject:role" 
    NameFormat="urn:oasis:names:tc:SAML:2.0:attrname-format:uri">
    <saml:AttributeValue 
     xmlns:xs="http://www.w3.org/2001/XMLSchema" 
     xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" 
     xsi:type="xs:string">physician
    </saml:AttributeValue>
   </saml:Attribute>
   <saml:Attribute 
    FriendlyName="XSPA Purpose of Use" 
    Name="urn:oasis:names:tc:xspa:1.0:subject:purposeofuse" 
    NameFormat="urn:oasis:names:tc:SAML:2.0:attrname-format:uri">
    <saml:AttributeValue 
     xmlns:xs="http://www.w3.org/2001/XMLSchema" 
     xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" 
     xsi:type="xs:string">TREATMENT
    </saml:AttributeValue>
   </saml:Attribute>
   <saml:Attribute 
    FriendlyName="XSPA Locality" 
    Name="urn:oasis:names:tc:xspa:1.0:environment:locality" 
    NameFormat="urn:oasis:names:tc:SAML:2.0:attrname-format:uri">
    <saml:AttributeValue 
     xmlns:xs="http://www.w3.org/2001/XMLSchema" 
     xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" 
     xsi:type="xs:string">Kreiskrankenhaus Neustadt
    </saml:AttributeValue>
   </saml:Attribute>
  </saml:AttributeStatement>
 </saml:Assertion>
</wsse:Security>
</pre>


Querverweise und Referenzen

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