This is a summary of what must be in place before the migration starts.

• A Windows host.
• The same Java version as for the corresponding Identity Manager release is installed and its java.exe in your PATH. See IDM 23.10.3 - Requirements and interoperability.
• Java has the Unlimited Strength Jurisdiction Policy Files installed.
• The new keypair has been generated.
• For every tenant on the system have access to:
  • tenant ID
  • administrative username + password

1. Extract the zip archive containing the Secret Fields Key Updater.
2. Go to the extracted Secret Fields Key Updater directory.
3. Edit the file database.properties as appropriate. For more information on this file, see Install Identity Manager.
   

dataSourceType=H2
dataSource.jdbcUrl=jdbc:sqlserver://<HOST_NAME>:<DB_PORT>;instance=<INSTANCE_NAME>;databaseName=<DB_NAME>;AUTO_SERVER=TRUE
dataSource.user=<USER_NAME>
dataSource.password=<USER_PASSWORD>

1. Open the file config/encryption-config.xml.
2. Update the EncryptedFields and NewEncryptedFields field descriptors and their referenced keys as described below. For more information on this file, see Sign and encrypt engine in Identity Manager.
   1. EncryptedFields is the old, to be replaced, descriptor. Adapt its values to match the ones that are currently set up in Identity Manager.
      In this example, EncryptedFields references oldEncCert as its key. Change the referenced key to match the one that is currently referenced in Identity Manager.
   2. NewEncryptedFields is the new descriptor, holding the information of the replacement key. Change its values accordingly.
      In this example, NewEncryptedFields references newEncCert as its key. Change the referenced key to match the key that will replace the old one in Identity Manager.

<?xml version="1.0" encoding="UTF-8"?>
<engineSignEncrypt>
  <descriptors>
    <descriptor name="EncryptedFields" version="1">
      <type algorithm="AES/CBC/PKCS7Padding" size="256" result="NX02" key="oldEncCert" asymCipher="RSA/None/OAEPWithSHA384AndMGF1Padding"/>
    </descriptor>
    <descriptor name="NewEncryptedFields" version="1">
      <type algorithm="AES/CBC/PKCS7Padding" size="256" result="NX02" key="newEncCert" asymCipher="RSA/None/OAEPWithSHA384AndMGF1Padding"/>
    </descriptor>
  </descriptors>
  <keys>
    <key name="oldEncCert">
      <type name="pkcs12" locationValue="classpath:oldEncKeypair.p12" pin="1234567"/>
    </key>
    <key name="newEncCert">
      <type name="pkcs12" locationValue="classpath:newEncKeypair.p12" pin="1234"/>
    </key>
  </keys>
</engineSignEncrypt>

Before you start the migration:

1. Stop the Identity Manager applications (shut down Tomcat or the respective docker containers by running docker compose down from within docker/compose/identitymanager/<webappname>/).
2. Create a backup of the respective databases.

1. Edit migrate_general.properties and set the following values:

   Attribute	Value	Description
   username		Name of the administrator of the respective tenant. This user will be used to perform the update.
   password		The administrator's password.
   tenantId		The Tenant ID.

1. Double-check that all preparation steps were executed, especially a database update of the state before migrating the first tenant.
2. Start the Secret Fields Key Updater by executing the batch file start_migration.bat on Windows.

During the migration, log files are created in the file logs/idm_migration.log.

If necessary, edit log4j.xml to customize the path of the log messages. 

1. When Secret Fields Key Updater is finished, look in the logfile.
   1. If you see the message "SUCCESS: Encrypted Fields Keypair changed!", the operation was successful. In this case, proceed with the next tenant, if any left, otherwise with the next section.
   2. If you see the message "FAILED: Changing the Encrypted Fields Keypair FAILED with status ...", the application has failed. Restore your database from the dump you created earlier and contact Nexus.

1. Make sure the Secret Fields Key Updater successfully ran for every single tenant on the system.

1. For docker:
   Open docker/compose/identitymanager/config/signencrypt.xml for editing.
   or:
   For WAR file deployment: 
   Open WEB-INF/classes/engineSignEncrypt.xml in Identity Manager Operator, Identity Manager Admin and Identity Manager Tenant for editing.
2. Change the attributes of the EncryptedFields descriptor and its referenced key to the values needed for the new keypair, as you set them for the NewEncryptedFields descriptor in the migration application. Note that the descriptor's name must still be EncryptedFields and not NewEncryptedFields for Identity Manager.
3. For docker:
   Run docker compose up from within  docker/compose/identitymanager/<webappname>/ for all Identity Manager applications (Admin, Operator and Tenant) to recreate the docker containers.
   or:
   For WAR file deployment:
   Start Identity Manager.