Sun Java System Application Server Enterprise Edition 8.1 2005Q2 Administration Guide

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### Managing Security of Passwords

In this release of the Application Server, the file `domain.xml`, which contains the specifications for a particular domain, initially contains the password of the Sun Java System Message Queue broker in clear text. The element in the `domain.xml` file that contains this password is the `admin-password` attribute of the `jms-host` element. Because this password is not changeable at installation time, it is not a significant security impact.

However, use the Admin Console to add users and resources and assign passwords to these users and resources. Some of these passwords are written to the `domain.xml` file in clear text, for example, passwords for accessing a database. Having these passwords in clear text in the `domain.xml` file can present a security hazard. You can encrypt any password in `domain.xml`, including the `admin-password` attribute or a database password using the following procedure.

#### To encrypt a password in domain.xml

1. From the directory where the `domain.xml` file resides (domain-dir`/config` by default), run the following `asadmin` command:

       asadmin create-password-alias --user admin alias-name

   For example,

       asadmin create-password-alias --user admin jms-password

   A password prompt appears (`admin` in this case). Refer to the man pages for the `create-password-alias`, `list-password-aliases`, `delete-password-alias` commands for more information.

2. Remove and replace the password in `domain.xml`. This is accomplished using the `asadmin set` command. An example of using the `set` command for this purpose is as follows:

       asadmin set --user admin server.jms-service.jms-host.
       default_JMS_host.admin-password='${ALIAS=jms-password}'

3. Restart the Application Server for the relevant domain.

#### Protecting files with encoded passwords

Some files contain encoded passwords that need protecting using file system permissions. These files include the following:

- domain-dir`/master-password`

  This file contains the encoded master password and should be protected with file system permissions 600.

- Any password file created to pass as an argument using the `--passwordfile` argument to `asadmin` should be protected with file system permissions 600.

#### To change the master password

The master password (MP) is an overall shared password. It is never used for authentication and is never transmitted over the network. This password is the choke point for overall security; the user can choose to enter it manually when required, or obscure it in a file. It is the most sensitive piece of data in the system. The user can force prompting for the MP by removing this file. When the master password is changed, it is re-saved in the master-password keystore.

1. Stop the Application Server for the domain. Use the `asadmin change-master-password` command, which prompts for the old and new passwords, then re-encrypts all dependent items. For example,

       asadmin change-master-password>
       Please enter the master password>
       Please enter the new master password>
       Please enter the the new master password again>

2. Restart the Application Server.

   Caution –

   At this point in time, server instances that are running must not be started and running server instances must not be restarted until the SMP on their corresponding node agent has been changed. If a server instance is restarted before changing its SMP, it will fail to come up.

3. Stop each node agent and its related servers one at a time. Run the `asadmin change-master-password` command again, and then restart the node agent and its related servers.

4. Continue with the next node agent until all node agents have been addressed. In this way, a rolling change is accomplished.

#### To change the admin password

Encrypting the admin password was discussed in Managing Security of Passwords. Encrypting the admin password is strongly encouraged. If you want to change the admin password before encrypting it, use the `asadmin set` command. An example of using the `set` command for this purpose is as follows:

    asadmin set --user admin
    server.jms-service.jms-host.default_JMS_host.admin-password=new_pwd

It is also possible to change the admin password using the Admin Console as in the following procedure.

1. In the Admin Console tree component, expand the Configurations node.

2. Select the instance to configure:

   - To configure a particular instance, expand the instance’s config node. For example, the default instance, `server`, expand the `server-config` node.

   - To configure the default settings for all instances, expand the `default-config` node.

3. Expand the Security node.

4. Expand the Realms node.

5. Select the `admin-realm` node.

6. Click the Manage Users button from the Edit Realm page.

7. Select the user named `admin`.

8. Enter the new password and confirm the password.

9. Click Save to save or click Close to close without saving.

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- Next: Assigning Security Responsibilities

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