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<section id="adapter-config">
    <title>General Adapter Config</title>
    <para>
        Each adapter supported by Keycloak can be configured by a simple JSON text file.  This is what one might
        look like:
    </para>
    <para>
<programlisting><![CDATA[{
  "realm" : "demo",
  "resource" : "customer-portal",
  "realm-public-key" : "MIGfMA0GCSqGSIb3D...31LwIDAQAB",
  "auth-server-url" : "https://localhost:8443/auth",
  "ssl-required" : "external",
  "use-resource-role-mappings" : false,
  "enable-cors" : true,
  "cors-max-age" : 1000,
  "cors-allowed-methods" : "POST, PUT, DELETE, GET",
  "bearer-only" : false,
  "enable-basic-auth" : false,
  "expose-token" : true,
   "credentials" : {
      "secret" : "234234-234234-234234"
   },

   "connection-pool-size" : 20,
   "disable-trust-manager": false,
   "allow-any-hostname" : false,
   "truststore" : "path/to/truststore.jks",
   "truststore-password" : "geheim",
   "client-keystore" : "path/to/client-keystore.jks",
   "client-keystore-password" : "geheim",
   "client-key-password" : "geheim"
}]]>

</programlisting>
    </para>
    <para>
        Some of these configuration switches may be adapter specific and some are common across all adapters.
        For Java adapters you can use <literal>${...}</literal> enclosure as System property replacement.
        For example <literal>${jboss.server.config.dir}</literal>.  Also, you can obtain a template
        for this config file from the admin console.  Go to the realm and select the application you want a template for.
        Go to the <literal>Installation</literal> tab and this will provide you with a template that includes
        the public key of the realm.
    </para>
    <para>
        Here is a description of each item:
    </para>
    <para>
        <variablelist>
            <varlistentry>
                <term>realm</term>
                <listitem>
                    <para>
                        Name of the realm representing the users of your distributed applications and services.
                        This is
                        <emphasis>REQUIRED.</emphasis>
                    </para>
                </listitem>
            </varlistentry>
            <varlistentry>
                <term>resource</term>
                <listitem>
                    <para>
                        Username of the application. Each application has a username that is used when the
                        application connects with the Keycloak server to turn an access code into an access token
                        (part of the OAuth 2.0 protocol). This is
                        <emphasis>REQUIRED.</emphasis>
                    </para>
                </listitem>
            </varlistentry>
            <varlistentry>
                <term>realm-public-key</term>
                <listitem>
                    <para>
                        PEM format of public key. You can obtain this from the administration console.
                        This is
                        <emphasis>REQUIRED.</emphasis>
                    </para>
                </listitem>
            </varlistentry>
            <varlistentry>
                <term>auth-server-url</term>
                <listitem>
                    <para>
                        The base URL of the Keycloak Server.  All other Keycloak pages and REST services are derived
                        from this.  It is usually of the form <literal>https://host:port/auth</literal>
                        This is
                        <emphasis>REQUIRED.</emphasis>
                    </para>
                </listitem>
            </varlistentry>
            <varlistentry>
                <term>ssl-required</term>
                <listitem>
                    <para>
                        Ensures that all communication to and from the Keycloak server from the adapter is over HTTPS.
                        This is <emphasis>OPTIONAL</emphasis>. The default value is
                        <emphasis>external</emphasis>
                        meaning that HTTPS is required by default for external requests. Valid values are 'all', 'external'
                        and 'none'.
                    </para>
                </listitem>
            </varlistentry>
            <varlistentry>
                <term>use-resource-role-mappings</term>
                <listitem>
                    <para>
                        If set to true, the adapter will look inside the token for application level role mappings for
                        the
                        user. If false, it will look at the realm level for user role mappings.
                        This is <emphasis>OPTIONAL</emphasis>. The default value is <emphasis>false</emphasis>.
                    </para>
                </listitem>
            </varlistentry>
            <varlistentry>
                <term>public-client</term>
                <listitem>
                    <para>
                        If set to true, the adapter will not send credentials for the client to Keycloak.
                        The default value is <emphasis>false</emphasis>.
                    </para>
                </listitem>
            </varlistentry>
            <varlistentry>
                <term>enable-cors</term>
                <listitem>
                    <para>
                        This enables CORS support. It will handle CORS preflight requests. It will also look into
                        the access token to determine valid origins.
                        This is <emphasis>OPTIONAL</emphasis>. The default value is <emphasis>false</emphasis>.
                    </para>
                </listitem>
            </varlistentry>
            <varlistentry>
                <term>cors-max-age</term>
                <listitem>
                    <para>
                        If CORS is enabled, this sets the value of the
                        <literal>Access-Control-Max-Age</literal>
                        header.
                        This is <emphasis>OPTIONAL</emphasis>. If not set, this header is not returned in CORS
                        responses.
                    </para>
                </listitem>
            </varlistentry>
            <varlistentry>
                <term>cors-allowed-methods</term>
                <listitem>
                    <para>
                        If CORS is enabled, this sets the value of the
                        <literal>Access-Control-Allow-Methods</literal>
                        header. This should be a comma-separated string.
                        This is <emphasis>OPTIONAL</emphasis>. If not set, this header is not returned in CORS
                        responses.
                    </para>
                </listitem>
            </varlistentry>
            <varlistentry>
                <term>cors-allowed-headers</term>
                <listitem>
                    <para>
                        If CORS is enabled, this sets the value of the
                        <literal>Access-Control-Allow-Headers</literal>
                        header. This should be a comma-separated string.
                        This is <emphasis>OPTIONAL</emphasis>. If not set, this header is not returned in CORS
                        responses.
                    </para>
                </listitem>
            </varlistentry>
            <varlistentry>
                <term>bearer-only</term>
                <listitem>
                    <para>
                        This tells the adapter to only do bearer token authentication. That is, it will not do
                        OAuth 2.0 redirects, but only accept bearer tokens through the
                        <literal>Authorization</literal>
                        header.
                        This is <emphasis>OPTIONAL</emphasis>. The default value is <emphasis>false</emphasis>.
                    </para>
                </listitem>
            </varlistentry>
            <varlistentry>
                <term>enable-basic-auth</term>
                <listitem>
                    <para>
                        This tells the adapter to also support basic authentication. If this option is enabled,
                        then <emphasis>secret</emphasis> must also be provided.
                        This is <emphasis>OPTIONAL</emphasis>. The default value is <emphasis>false</emphasis>.
                    </para>
                </listitem>
            </varlistentry>
            <varlistentry>
                <term>expose-token</term>
                <listitem>
                    <para>
                        If <literal>true</literal>, an authenticated browser client (via a Javascript HTTP invocation)
                        can obtain the signed access token via the URL <literal>root/k_query_bearer_token</literal>.
                        This is <emphasis>OPTIONAL</emphasis>. The default value is <emphasis>false</emphasis>.
                    </para>
                </listitem>
            </varlistentry>
            <varlistentry>
                <term>credentials</term>
                <listitem>
                    <para>
                        Specify the credentials of the application. This is an object notation where the key
                        is the credential type and the value is the value of the credential type. Currently only
                        <literal>password</literal>
                        is supported.
                        This is <emphasis>REQUIRED</emphasis>.
                    </para>
                </listitem>
            </varlistentry>

            <varlistentry>
                <term>connection-pool-size</term>
                <listitem>
                    <para>
                        Adapters will make separate HTTP invocations to the Keycloak Server to turn an access code
                        into an access token.  This config option defines how many connections to the Keycloak Server
                        should be pooled.
                        This is <emphasis>OPTIONAL</emphasis>.  The default value is <literal>20</literal>.
                    </para>
                </listitem>
            </varlistentry>
            <varlistentry>
                <term>disable-trust-manager</term>
                <listitem>
                    <para>
                        If the Keycloak Server requires HTTPS and this config option is set to <literal>true</literal>
                        you do not have to specify a truststore.  While convenient,  this setting is not recommended
                        as you will not be verifying the host name of the Keycloak Server.
                        This is <emphasis>OPTIONAL</emphasis>.  The default value is <literal>false</literal>.
                    </para>
                </listitem>
            </varlistentry>
            <varlistentry>
                <term>allow-any-hostname</term>
                <listitem>
                    <para>
                        If the Keycloak Server requires HTTPS and this config option is set to <literal>true</literal>
                        the Keycloak Server's certificate is validated via the truststore, but host name validation is
                        not done.  This is not a recommended.  This seting may be useful in test environments
                        This is <emphasis>OPTIONAL</emphasis>.  The default value is <literal>false</literal>.
                    </para>
                </listitem>
            </varlistentry>

            <varlistentry>
                <term>truststore</term>
                <listitem>
                    <para>
                        This setting is for Java adapters. The value is the file path to a Java keystore file.  If
                        you prefix the path with <literal>classpath:</literal>, then the truststore will be obtained
                        from the deployment's classpath instead.
                        Used for outgoing HTTPS communications to the Keycloak server. Client making HTTPS
                        requests need a way to verify the host of the server they are talking to. This is
                        what the trustore does. The keystore contains one or more trusted
                        host certificates or certificate authorities. You can
                        create this truststore by extracting the public certificate of the Keycloak server's SSL
                        keystore.
                        This is
                        <emphasis>OPTIONAL</emphasis>
                        if
                        <literal>ssl-required</literal>
                        is
                        <literal>none</literal>
                        or
                        <literal>disable-trust-manager</literal>
                        is <literal>true</literal>.
                    </para>
                </listitem>
            </varlistentry>
            <varlistentry>
                <term>truststore-password</term>
                <listitem>
                    <para>
                        Password for the truststore keystore.
                        This is
                        <emphasis>REQUIRED</emphasis>
                        if
                        <literal>truststore</literal>
                        is set.
                    </para>
                </listitem>
            </varlistentry>
            <varlistentry>
                <term>client-keystore</term>
                <listitem>
                    <para>
                        <emphasis>Not supported yet, but we will support in future versions.</emphasis>

                        This setting is for Java adapters. This is the file path to a Java keystore file.
                        This keystore contains client certificate for two-way SSL when the adapter makes
                        HTTPS requests to the Keycloak server.
                        This is <emphasis>OPTIONAL</emphasis>.
                    </para>
                </listitem>
            </varlistentry>
            <varlistentry>
                <term>client-keystore-password</term>
                <listitem>
                    <para>
                        <emphasis>Not supported yet, but we will support in future versions.</emphasis>
                        Password for the client keystore.
                        This is
                        <emphasis>REQUIRED</emphasis>
                        if
                        <literal>client-keystore</literal>
                        is set.
                    </para>
                </listitem>
            </varlistentry>
            <varlistentry>
                <term>client-key-password</term>
                <listitem>
                    <para>
                        <emphasis>Not supported yet, but we will support in future versions.</emphasis>
                        Password for the client's key.
                        This is
                        <emphasis>REQUIRED</emphasis>
                        if
                        <literal>client-keystore</literal>
                        is set.
                    </para>
                </listitem>
            </varlistentry>
            <varlistentry>
                <term>auth-server-url-for-backend-requests</term>
                <listitem>
                    <para>
                        Alternative location of auth-server-url used just for backend requests. It must be absolute URI. Useful
                        especially in cluster (see <link linkend="relative-uri-optimization">Relative URI Optimization</link>) or if you would like to use <emphasis>https</emphasis> for browser requests
                        but stick with <emphasis>http</emphasis> for backend requests etc.
                    </para>
                </listitem>
            </varlistentry>
            <varlistentry>
                <term>always-refresh-token</term>
                <listitem>
                    <para>
                        If <emphasis>true</emphasis>, Keycloak will refresh token in every request. More info in <link linkend="refresh-token-each-req">Refresh token in each request</link> .
                    </para>
                </listitem>
            </varlistentry>
            <varlistentry>
                <term>register-node-at-startup</term>
                <listitem>
                    <para>
                        If <emphasis>true</emphasis>, then adapter will send registration request to Keycloak. It's <emphasis>false</emphasis>
                        by default and useful just in cluster (See <link linkend="registration-app-nodes">Registration of application nodes to Keycloak</link>)
                    </para>
                </listitem>
            </varlistentry>
            <varlistentry>
                <term>register-node-period</term>
                <listitem>
                    <para>
                        Period for re-registration adapter to Keycloak. Useful in cluster. See <link linkend="registration-app-nodes">Registration of application nodes to Keycloak</link> for details.
                    </para>
                </listitem>
            </varlistentry>
            <varlistentry>
                <term>token-store</term>
                <listitem>
                    <para>
                        Possible values are <emphasis>session</emphasis> and <emphasis>cookie</emphasis>. Default is <emphasis>session</emphasis>,
                        which means that adapter stores account info in HTTP Session. Alternative <emphasis>cookie</emphasis> means storage of info in cookie.
                        See <link linkend="stateless-token-store">Stateless token store</link> for details.
                    </para>
                </listitem>
            </varlistentry>
            <varlistentry>
                <term>principal-attribute</term>
                <listitem>
                    <para>
                        OpenID Connection ID Token attribute to populate the UserPrincipal name with.  If token attribute is null, defaults to <literal>sub</literal>.
                        Possible values are <literal>sub</literal>, <literal>preferred_username</literal>, <literal>email</literal>, <literal>name</literal>, <literal>nickname</literal>, <literal>given_name</literal>, <literal>family_name</literal>.
                    </para>
                </listitem>
            </varlistentry>
            <varlistentry>
                <term>turn-off-change-session-id-on-login</term>
                <listitem>
                    <para>
                        The session id is changed by default on a successful login on some platforms to plug a security attack vector (Tomcat 8, Jetty9, Undertow/Wildfly).  Change this to true if you want to turn this off
                        This is <emphasis>OPTIONAL</emphasis>. The default value is <emphasis>false</emphasis>.
                    </para>
                </listitem>
            </varlistentry>
        </variablelist>
    </para>
</section>
