keycloak-scim/docbook/saml-adapter-docs/reference/en/en-US/modules/assertion-api.xml

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<chapter id="assertions">
    <title>Obtaining Assertion Attributes</title>
    <para>
        After a successful SAML login, your application code may want to obtain attribute values passed with the SAML assertion.
        <literal>HttpServletRequest.getUserPrincipal</literal> returns a Principal object that you can typecast into a
        Keycloak specific class called <literal>org.keycloak.adapters.saml.SamlPrincipal</literal>.  This object allows
        you to look at the raw assertion and also has convenience functions to look up attribute values.
    </para>
    <para>
<programlisting><![CDATA[
package org.keycloak.adapters.saml;

public class SamlPrincipal implements Serializable, Principal {
    /**
     * Get full saml assertion
     *
     * @return
     */
    public AssertionType getAssertion() {
       ...
    }

    /**
     * Get SAML subject sent in assertion
     *
     * @return
     */
    public String getSamlSubject() {
        ...
    }

    /**
     * Subject nameID format
     *
     * @return
     */
    public String getNameIDFormat() {
        ...
    }

    @Override
    public String getName() {
        ...
    }

    /**
     * Convenience function that gets Attribute value by attribute name
     *
     * @param name
     * @return
     */
    public List<String> getAttributes(String name) {
        ...

    }

    /**
     * Convenience function that gets Attribute value by attribute friendly name
     *
     * @param friendlyName
     * @return
     */
    public List<String> getFriendlyAttributes(String friendlyName) {
        ...
    }

    /**
     * Convenience function that gets first  value of an attribute by attribute name
     *
     * @param name
     * @return
     */
    public String getAttribute(String name) {
        ...
    }

    /**
     * Convenience function that gets first  value of an attribute by attribute name
     *
     *
     * @param friendlyName
     * @return
     */
    public String getFriendlyAttribute(String friendlyName) {
        ...
    }

    /**
     * Get set of all assertion attribute names
     *
     * @return
     */
    public Set<String> getAttributeNames() {
        ...
    }

    /**
     * Get set of all assertion friendly attribute names
     *
     * @return
     */
    public Set<String> getFriendlyNames() {
        ...
    }
}
]]>
</programlisting>
    </para>
</chapter>