SAML v1.1 Protocol

CAS supports the standardized SAML 1.1 protocol primarily to:

A SAML 1.1 ticket validation response is obtained by validating a ticket via POST at the /samlValidate URI.

Support is enabled by including the following dependency in the WAR overlay:



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<dependency>
    <groupId>org.apereo.cas</groupId>
    <artifactId>cas-server-support-saml</artifactId>
    <version>${cas.version}</version>
</dependency>





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implementation "org.apereo.cas:cas-server-support-saml:${project.'cas.version'}"





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dependencyManagement {
    imports {
        mavenBom "org.apereo.cas:cas-server-support-bom:${project.'cas.version'}"
    }
}

dependencies {
    implementation "org.apereo.cas:cas-server-support-saml"
}





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dependencies {
    /*
    The following platform references should be included automatically and are listed here for reference only.
            
    implementation enforcedPlatform("org.apereo.cas:cas-server-support-bom:${project.'cas.version'}")
    implementation platform(org.springframework.boot.gradle.plugin.SpringBootPlugin.BOM_COORDINATES)
    */

    implementation "org.apereo.cas:cas-server-support-saml"
}

Applications

Registering SAML v1.1 applications with CAS is similar to any other CAS applications:



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{
  "@class" : "org.apereo.cas.services.CasRegisteredService",
  "serviceId" : "^https://app.example.org.+",
  "name" : "App",
  "id" : 1,
  "supportedProtocols": [ "java.util.HashSet", [ "SAML1" ] ]
}

Please note that there is no dedicated separate application type in CAS for SAML v1.1 applications. As the example indicates, you should register your SAML v1.1 applications with CAS using the CasRegisteredService type.

Actuator Endpoints

The following endpoints are provided by CAS:

 Handle validation request and produce saml1 payload.


Sample Request



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POST /cas/samlValidate?ticket=
Host: cas.example.com
Content-Length: 491
Content-Type: text/xml

<SOAP-ENV:Envelope xmlns:SOAP-ENV="http://schemas.xmlsoap.org/soap/envelope/">
  <SOAP-ENV:Header/>
  <SOAP-ENV:Body>
    <samlp:Request xmlns:samlp="urn:oasis:names:tc:SAML:1.0:protocol" MajorVersion="1"
      MinorVersion="1" RequestID="_192.168.16.51.1024506224022"
      IssueInstant="2002-06-19T17:03:44.022Z">
      <samlp:AssertionArtifact>
        ST-1-u4hrm3td92cLxpCvrjylcas.example.com
      </samlp:AssertionArtifact>
    </samlp:Request>
  </SOAP-ENV:Body>
</SOAP-ENV:Envelope>

Sample Response



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<?xml version="1.0" encoding="UTF-8"?>
<SOAP-ENV:Envelope xmlns:SOAP-ENV="http://schemas.xmlsoap.org/soap/envelope/">
  <SOAP-ENV:Body>
    <saml1p:Response xmlns:saml1p="urn:oasis:names:tc:SAML:1.0:protocol" InResponseTo="...." IssueInstant="2017-08-15T06:30:04.622Z" MajorVersion="1" MinorVersion="1" ResponseID="_bf6957bad275fc74a1c079a445581441">
      <saml1p:Status>
        <saml1p:StatusCode Value="saml1p:Success" />
      </saml1p:Status>
      <saml1:Assertion xmlns:saml1="urn:oasis:names:tc:SAML:1.0:assertion" AssertionID="_d9673d8af414cc9612929480b58cb2a1" IssueInstant="2017-08-15T06:30:04.622Z" Issuer="testIssuer" MajorVersion="1" MinorVersion="1">
        <saml1:Conditions NotBefore="2017-08-15T06:30:04.622Z" NotOnOrAfter="2017-08-15T06:30:05.622Z">
          <saml1:AudienceRestrictionCondition>
            <saml1:Audience>https://google.com</saml1:Audience>
          </saml1:AudienceRestrictionCondition>
        </saml1:Conditions>
        <saml1:AuthenticationStatement AuthenticationInstant="2017-08-15T06:46:43.585Z" AuthenticationMethod="urn:ietf:rfc:2246">
          <saml1:Subject>
            <saml1:NameIdentifier>testPrincipal</saml1:NameIdentifier>
            <saml1:SubjectConfirmation>
              <saml1:ConfirmationMethod>urn:oasis:names:tc:SAML:1.0:cm:artifact</saml1:ConfirmationMethod>
            </saml1:SubjectConfirmation>
          </saml1:Subject>
        </saml1:AuthenticationStatement>
        <saml1:AttributeStatement>
          <saml1:Subject>
            <saml1:NameIdentifier>testPrincipal</saml1:NameIdentifier>
            <saml1:SubjectConfirmation>
              <saml1:ConfirmationMethod>urn:oasis:names:tc:SAML:1.0:cm:artifact</saml1:ConfirmationMethod>
            </saml1:SubjectConfirmation>
          </saml1:Subject>
          <saml1:Attribute AttributeName="testAttribute" AttributeNamespace="whatever">
            <saml1:AttributeValue>testValue</saml1:AttributeValue>
          </saml1:Attribute>
          <saml1:Attribute AttributeName="samlAuthenticationStatementAuthMethod" AttributeNamespace="whatever">
            <saml1:AttributeValue>urn:ietf:rfc:2246</saml1:AttributeValue>
          </saml1:Attribute>
          <saml1:Attribute AttributeName="testSamlAttribute" AttributeNamespace="whatever">
            <saml1:AttributeValue>value</saml1:AttributeValue>
          </saml1:Attribute>
          <saml1:Attribute AttributeName="testAttributeCollection" AttributeNamespace="whatever">
            <saml1:AttributeValue>tac1</saml1:AttributeValue>
            <saml1:AttributeValue>tac2</saml1:AttributeValue>
          </saml1:Attribute>
        </saml1:AttributeStatement>
      </saml1:Assertion>
    </saml1p:Response>
  </SOAP-ENV:Body>
</SOAP-ENV:Envelope>

Configuration

The following settings and properties are available from the CAS configuration catalog:

The configuration settings listed below are tagged as Required in the CAS configuration metadata. This flag indicates that the presence of the setting may be needed to activate or affect the behavior of the CAS feature and generally should be reviewed, possibly owned and adjusted. If the setting is assigned a default value, you do not need to strictly put the setting in your copy of the configuration, but should review it nonetheless to make sure it matches your deployment expectations.

The configuration settings listed below are tagged as Optional in the CAS configuration metadata. This flag indicates that the presence of the setting is not immediately necessary in the end-user CAS configuration, because a default value is assigned or the activation of the feature is not conditionally controlled by the setting value. In other words, you should only include this field in your configuration if you need to modify the default value or if you need to turn on the feature controlled by the setting.

  • cas.saml-core.attribute-namespace=http://www.ja-sig.org/products/cas/

    • Attribute namespace to use when generating SAML1 responses.

    org.apereo.cas.configuration.model.support.saml.SamlCoreProperties.

    How can I configure this property?

  • cas.saml-core.issue-length=PT30S

    • Issue length that controls the validity period of the assertion.

    This settings supports the java.time.Duration syntax [?].

    org.apereo.cas.configuration.model.support.saml.SamlCoreProperties.

    How can I configure this property?

  • cas.saml-core.issuer=localhost

    • Issuer of the assertion when generating SAML1 responses.

    org.apereo.cas.configuration.model.support.saml.SamlCoreProperties.

    How can I configure this property?

  • cas.saml-core.security-manager=org.apache.xerces.util.SecurityManager

    • Qualified name of the security manager class used for creating a SAML parser pool.

    org.apereo.cas.configuration.model.support.saml.SamlCoreProperties.

    How can I configure this property?

  • cas.saml-core.skew-allowance=PT30S

    • Skew allowance that controls the issue instance of the authentication.

    This settings supports the java.time.Duration syntax [?].

    org.apereo.cas.configuration.model.support.saml.SamlCoreProperties.

    How can I configure this property?

  • cas.saml-core.ticketid-saml2=false

    • Whether ticket ids generated should be saml2 compliant when generating SAML1 responses.

    org.apereo.cas.configuration.model.support.saml.SamlCoreProperties.

    How can I configure this property?

    Configuration Metadata

    The collection of configuration properties listed in this section are automatically generated from the CAS source and components that contain the actual field definitions, types, descriptions, modules, etc. This metadata may not always be 100% accurate, or could be lacking details and sufficient explanations.

    Be Selective

    This section is meant as a guide only. Do NOT copy/paste the entire collection of settings into your CAS configuration; rather pick only the properties that you need. Do NOT enable settings unless you are certain of their purpose and do NOT copy settings into your configuration only to keep them as reference. All these ideas lead to upgrade headaches, maintenance nightmares and premature aging.

    YAGNI

    Note that for nearly ALL use cases, declaring and configuring properties listed here is sufficient. You should NOT have to explicitly massage a CAS XML/Java/etc configuration file to design an authentication handler, create attribute release policies, etc. CAS at runtime will auto-configure all required changes for you. If you are unsure about the meaning of a given CAS setting, do NOT turn it on without hesitation. Review the codebase or better yet, ask questions to clarify the intended behavior.

    Naming Convention

    Property names can be specified in very relaxed terms. For instance cas.someProperty, cas.some-property, cas.some_property are all valid names. While all forms are accepted by CAS, there are certain components (in CAS and other frameworks used) whose activation at runtime is conditional on a property value, where this property is required to have been specified in CAS configuration using kebab case. This is both true for properties that are owned by CAS as well as those that might be presented to the system via an external library or framework such as Spring Boot, etc.

    :information_source: Note

    When possible, properties should be stored in lower-case kebab format, such as cas.property-name=value. The only possible exception to this rule is when naming actuator endpoints; The name of the actuator endpoints (i.e. ssoSessions) MUST remain in camelCase mode.

    Settings and properties that are controlled by the CAS platform directly always begin with the prefix cas. All other settings are controlled and provided to CAS via other underlying frameworks and may have their own schemas and syntax. BE CAREFUL with the distinction. Unrecognized properties are rejected by CAS and/or frameworks upon which CAS depends. This means if you somehow misspell a property definition or fail to adhere to the dot-notation syntax and such, your setting is entirely refused by CAS and likely the feature it controls will never be activated in the way you intend.

    Validation

    Configuration properties are automatically validated on CAS startup to report issues with configuration binding, specially if defined CAS settings cannot be recognized or validated by the configuration schema. Additional validation processes are also handled via Configuration Metadata and property migrations applied automatically on startup by Spring Boot and family.

    Indexed Settings

    CAS settings able to accept multiple values are typically documented with an index, such as cas.some.setting[0]=value. The index [0] is meant to be incremented by the adopter to allow for distinct multiple configuration blocks.

    You may also need to declare the following repository in your CAS Overlay to be able to resolve dependencies:

    

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    repositories {
    maven { 
        mavenContent { releasesOnly() }
        url "https://build.shibboleth.net/maven/releases/" 
    }
}