Configuring Open Banking Key Manager

Follow the steps below to deploy the Open Banking Key Manager.

Do the following configurations in Key Manager and restart the server.

Go to the <WSO2_OB_KM_HOME>/bin directory and execute the following command:

./wso2server.sh

Configuring datasources

Configure the <WSO2_OB_KM_HOME>/repository/conf/datasources/master-datasources.xml file with the following configurations.

Update the URL, username, password, and driverClassName with the database credentials, and relevant database driver name in the WSO2AM_DB, WSO2CONFIG_DB, WSO2REG_DB, and WSO2UM_DB datasources. Given below is a sample of MySQL configurations.

If you are using Oracle, update the validationQuery in each datasource with the value below.

<validationQuery>SELECT 1 FROM DUAL</validationQuery>

<datasource>
   <name>WSO2AM_DB</name>
   <description>The datasource used for API Manager database</description>
   <jndiConfig>
      <name>jdbc/WSO2AM_DB</name>
   </jndiConfig>
   <definition type="RDBMS">
      <configuration>
         <url>jdbc:mysql://localhost:3306/openbank_apimgtdb?autoReconnect=true&useSSL=false</url>
         <username>root</username>
         <password>root</password>
         <driverClassName>com.mysql.jdbc.Driver</driverClassName>
         <maxActive>150</maxActive>
         <maxWait>60000</maxWait>
         <testOnBorrow>true</testOnBorrow>
         <validationQuery>SELECT 1</validationQuery>
         <validationInterval>30000</validationInterval>
         <defaultAutoCommit>false</defaultAutoCommit>
      </configuration>
   </definition>
</datasource>

Update the WSO2_CONSENT_DB datasource in the <WSO2_OBKM_HOME>/repository/conf/datasources/open-banking-datasources.xml file with the following configurations.

<datasources>
        <datasource>
            <name>WSO2_CONSENT_DB</name>
            <description>The datasource used for registry and user manager</description>
            <jndiConfig>
                <name>jdbc/WSO2ConsentDB</name>
            </jndiConfig>
            <definition type="RDBMS">
                <configuration>
                    <url>jdbc:mysql://localhost:3306/openbank_consentdb?autoReconnect=true&useSSL=false</url>
                    <username>root</username>
                    <password>root</password>
                    <driverClassName>com.mysql.jdbc.Driver</driverClassName>
                    <maxActive>150</maxActive>
                    <maxWait>60000</maxWait>
                    <testOnBorrow>true</testOnBorrow>
                    <validationQuery>SELECT 1</validationQuery>
                    <validationInterval>30000</validationInterval>
                    <defaultAutoCommit>false</defaultAutoCommit>
				</configuration>
			</definition>
		</datasource>
</datasources>

In the <WSO2_OBKM_HOME>/repository/conf/registry.xml file, update the properties given below.

<dbConfig name="configRegistry">
    <dataSource>jdbc/WSO2Config_DB</dataSource>
</dbConfig>
 
<remoteInstance url="https://<WSO2_OB_KM_HOST>:9443/registry">
    <id>configInstance</id>
    <dbConfig>configRegistry</dbConfig>
    <readOnly>false</readOnly>
    <enableCache>true</enableCache>
    <registryRoot>/</registryRoot>
</remoteInstance>
 
<mount path="/_system/config" overwrite="true">
    <instanceId>configInstance</instanceId>
    <targetPath>/_system/config</targetPath>
</mount>
 
<dbConfig name="governanceRegistry">
    <dataSource>jdbc/WSO2REG_DB</dataSource>
</dbConfig>
 
<remoteInstance url="https://<WSO2_OB_KM_HOST>:9443/registry">
    <id>governanceInstance</id>
    <dbConfig>governanceRegistry</dbConfig>
    <readOnly>false</readOnly>
    <enableCache>true</enableCache>
    <registryRoot>/</registryRoot>
</remoteInstance>
 
<mount path="/_system/governance" overwrite="true">
    <instanceId>governanceInstance</instanceId>
    <targetPath>/_system/governance</targetPath>
</mount>

In the <WSO2_OBKM_HOME>/repository/conf/user-mgt.xml file, update the datasource property to point to the WSO2UM_DB.

<Property name="dataSource">jdbc/WSO2UM_DB</Property>

Enable the internal JDBC user store in the <WSO2_OBKM_HOME>/repository/conf/user-mgt.xml file. Update the UsernameJavaRegEx, UsernameJavaScriptRegEx, CaseInsensitiveUsername, and UsernameWithEmailJavaScriptRegEx properties. Follow the sample configuration given below:

<UserStoreManager class="org.wso2.carbon.user.core.jdbc.JDBCUserStoreManager">
            <Property name="TenantManager">org.wso2.carbon.user.core.tenant.JDBCTenantManager</Property>
            <Property name="ReadOnly">false</Property>
            <Property name="ReadGroups">true</Property>
            <Property name="WriteGroups">true</Property>
            <Property name="UsernameJavaRegEx">a-zA-Z0-9@._-{3,30}$</Property>
            <Property name="UsernameJavaScriptRegEx">^[a-zA-Z0-9._-]+@[a-zA-Z0-9.-]+\.[a-zA-Z]{2,4}$</Property>
            <Property name="UsernameJavaRegExViolationErrorMsg">Username pattern policy violated</Property>
            <Property name="PasswordJavaRegEx">^[\S]{5,30}$</Property>
            <Property name="PasswordJavaScriptRegEx">^[\S]{5,30}$</Property>
            <Property name="PasswordJavaRegExViolationErrorMsg">Password length should be within 5 to 30 characters</Property>
            <Property name="RolenameJavaRegEx">^[\S]{3,30}$</Property>
            <Property name="RolenameJavaScriptRegEx">^[\S]{3,30}$</Property>
            <Property name="CaseInsensitiveUsername">true</Property>
            <Property name="SCIMEnabled">false</Property>
            <Property name="IsBulkImportSupported">false</Property>
            <Property name="PasswordDigest">SHA-256</Property>
            <Property name="StoreSaltedPassword">true</Property>
            <Property name="MultiAttributeSeparator">,</Property>
            <Property name="MaxUserNameListLength">100</Property>
            <Property name="MaxRoleNameListLength">100</Property>
            <Property name="UserRolesCacheEnabled">true</Property>
            <Property name="UserNameUniqueAcrossTenants">false</Property>
	        <Property name="UsernameWithEmailJavaScriptRegEx">^[\S]{3,30}$</Property>
        </UserStoreManager>

Configuring the carbon.xml file

Apply the following changes in the <WSO2_OBKM_HOME>/repository/conf/carbon.xml file:
1. Update the <HostName> and <MgtHostName> with the IP addresses of the Key Manager server(s).
2. Update the < KeyAlias> under <KeyStore> to match with the alias provided during the KeyStore creation for the Key Manager server.

Configuring the application-authentication.xml file

Update the <WSO2_OBKM_HOME>/repository/conf/identity/application-authentication.xml file with the following configurations.
1. Update the <AuthenticationEndpointURL> and <AuthenticationEndpointRetryURL> attributes with the URLs of the authentication web application, as shown below.
```
<AuthenticationEndpointURL>https://<OBKM_HOSTNAME>/authenticationendpoint/login.do</AuthenticationEndpointURL>
<AuthenticationEndpointRetryURL>https://<OBKM_HOSTNAME>/authenticationendpoint/retry.do</AuthenticationEndpointRetryURL>
```
2. Add the include action to the <AutheticationEndpointRedirectParams> request parameter in the <WSO2_OBKM_HOME>/repository/conf/identity/application-authentication.xml file. When the action is set to include, the defined parameters will be sent to the AuthenticationEndpoint as query parameters.
```
<AuthenticationEndpointRedirectParams action="include" removeOnConsumeFromAPI="true">
        <AuthenticationEndpointRedirectParam name="sessionDataKeyConsent"/>
        <AuthenticationEndpointRedirectParam name="relyingParty"/>
        <AuthenticationEndpointRedirectParam name="authenticators"/>
</AuthenticationEndpointRedirectParams>
```
  If you're using a customized authentication web app, you can access the hidden parameters using the sessionDataKeyConsent parameter. For more information, see Authentication Data API.

Configuring the identity.xml file

Update the <WSO2_OBKM_HOME>/repository/conf/identity/identity.xml file with the following configurations.

Define the Open Banking specific Request Object Validator under the <OpenIDConnect> as follows:

<RequestObjectValidator>com.wso2.finance.request.object.validator.OBRequestObjectValidatorImpl</RequestObjectValidator>

Update the following configurations under the <OAuth> property with the URL of the Open Banking API Manager Gateway.

<OAuth2AuthzEPUrl>${carbon.protocol}://<OBAM_HOSTNAME>:8243/authorize</OAuth2AuthzEPUrl>
<OAuth2TokenEPUrl>${carbon.protocol}://<OBAM_HOSTNAME>:8243/token</OAuth2TokenEPUrl>

<OAuth2UserInfoEPUrl>${carbon.protocol}://<OBAM_HOSTNAME>:8243/userinfo</OAuth2UserInfoEPUrl>

<OAuth2DCREPUrl>${carbon.protocol}://<OBAM_HOSTNAME>:8243/register</OAuth2DCREPUrl>

Update the following configuration under the <OpenIDConnect> tag with the hostname of the Open Banking API Manager server.
```
<IDTokenIssuerID>https://<WSO2_OB_APIM_HOST>:8243/token</IDTokenIssuerID>
```
Make sure the RenewRefreshTokenForRefreshGrant value set to false. With this configuration, the refresh token that is received by the refresh token grant type is not renewed. This is used to enforce consent re-authorization.
```
<RenewRefreshTokenForRefreshGrant>false</RenewRefreshTokenForRefreshGrant>
```
Add RenewTokenPerRequest and set the value to true. This configuration enforces a new token per each request, which will revoke any active tokens for the same application and user. This configuration is used to revoke previous tokens bound to the PSU during consent re-authentication.
```
<RenewTokenPerRequest>true</RenewTokenPerRequest>
```
Configure the Receiver URL of the <EventPublisher> under <AdaptiveAuth> with the hostname of the Open Banking Business Intelligence Server. By default, the relevant Siddhi Apps are configured to listen to port 8006.
```
<ReceiverURL>http://<WSO2_OB_BI_HOSTNAME>:8006/</ReceiverURL>
```

Add Open Banking specific response type handlers under <SupportedResponseTypes> as follows:

<SupportedResponseType>
	<ResponseTypeName>code</ResponseTypeName>
	<ResponseTypeHandlerImplClass>com.wso2.finance.open.banking.identity.extensions.response.type.handlers.OBCodeResponseTypeHandler</ResponseTypeHandlerImplClass>
</SupportedResponseType>
<SupportedResponseType>
	<ResponseTypeName>code id_token</ResponseTypeName>
	<ResponseTypeHandlerImplClass>com.wso2.finance.open.banking.identity.extensions.response.type.handlers.OBHybridResponseTypeHandler</ResponseTypeHandlerImplClass>
</SupportedResponseType>

Add the Open Banking specific grant types under <SupportedGrantTypes> as follows:

<SupportedGrantType>
	<GrantTypeName>authorization_code</GrantTypeName>
	<GrantTypeHandlerImplClass>com.wso2.finance.open.banking.identity.extensions.grant.type.handlers.OBAuthorizationCodeGrantHandler</GrantTypeHandlerImplClass>
</SupportedGrantType>
<SupportedGrantType>
	<GrantTypeName>client_credentials</GrantTypeName>
	<GrantTypeHandlerImplClass>com.wso2.finance.open.banking.identity.extensions.grant.type.handlers.OBClientCredentialsGrantHandler</GrantTypeHandlerImplClass>
</SupportedGrantType>

The cache configurations are available in <CacheConfig> under <CacheManager> element. You can update the configurations according to your requirements.
The ID Token Builder and the algorithm that signs the ID Token Builder are configurable.
By default, <IDTokenBuilder> is set to org.wso2.carbon.identity.openidconnect.DefaultIDTokenBuilder. For example, to sign the <IDTokenBuilder> with the SHA256withPS algorithm the configurations are as follows:
```
<OpenIDConnect>
	<IDTokenBuilder>org.wso2.carbon.identity.openidconnect.DefaultIDTokenBuilder</IDTokenBuilder>
	<SignatureAlgorithm>SHA256withPS</SignatureAlgorithm>
</OpenIDConnect>
```