24 KiB

Raw Blame History

Security

This chapter describes how security works with Apache ActiveMQ Artemis and how you can configure it. To disable security completely simply set the security-enabled property to false in the broker.xml file.

For performance reasons security is cached and invalidated every so long. To change this period set the property security-invalidation-interval, which is in milliseconds. The default is 10000 ms.

Role based security for addresses

Apache ActiveMQ Artemis contains a flexible role-based security model for applying security to queues, based on their addresses.

As explained in Using Core, Apache ActiveMQ Artemis core consists mainly of sets of queues bound to addresses. A message is sent to an address and the server looks up the set of queues that are bound to that address, the server then routes the message to those set of queues.

Apache ActiveMQ Artemis allows sets of permissions to be defined against the queues based on their address. An exact match on the address can be used or a wildcard match can be used using the wildcard characters '#' and '*'.

Seven different permissions can be given to the set of queues which match the address. Those permissions are:

createDurableQueue. This permission allows the user to create a durable queue under matching addresses.
deleteDurableQueue. This permission allows the user to delete a durable queue under matching addresses.
createNonDurableQueue. This permission allows the user to create a non-durable queue under matching addresses.
deleteNonDurableQueue. This permission allows the user to delete a non-durable queue under matching addresses.
send. This permission allows the user to send a message to matching addresses.
consume. This permission allows the user to consume a message from a queue bound to matching addresses.
manage. This permission allows the user to invoke management operations by sending management messages to the management address.

For each permission, a list of roles who are granted that permission is specified. If the user has any of those roles, he/she will be granted that permission for that set of addresses.

Let's take a simple example, here's a security block from broker.xml file:

<security-setting match="globalqueues.europe.#">
   <permission type="createDurableQueue" roles="admin"/>
   <permission type="deleteDurableQueue" roles="admin"/>
   <permission type="createNonDurableQueue" roles="admin, guest, europe-users"/>
   <permission type="deleteNonDurableQueue" roles="admin, guest, europe-users"/>
   <permission type="send" roles="admin, europe-users"/>
   <permission type="consume" roles="admin, europe-users"/>
</security-setting>

The '#' character signifies "any sequence of words". Words are delimited by the '.' character. For a full description of the wildcard syntax please see Understanding the Wildcard Syntax. The above security block applies to any address that starts with the string "globalqueues.europe.":

Only users who have the admin role can create or delete durable queues bound to an address that starts with the string "globalqueues.europe."

Any users with the roles admin, guest, or europe-users can create or delete temporary queues bound to an address that starts with the string "globalqueues.europe."

Any users with the roles admin or europe-users can send messages to these addresses or consume messages from queues bound to an address that starts with the string "globalqueues.europe."

The mapping between a user and what roles they have is handled by the security manager. Apache ActiveMQ Artemis ships with a user manager that reads user credentials from a file on disk, and can also plug into JAAS or JBoss Application Server security.

For more information on configuring the security manager, please see 'Changing the Security Manager'.

There can be zero or more security-setting elements in each xml file. Where more than one match applies to a set of addresses the more specific match takes precedence.

Let's look at an example of that, here's another security-setting block:

<security-setting match="globalqueues.europe.orders.#">
   <permission type="send" roles="europe-users"/>
   <permission type="consume" roles="europe-users"/>
</security-setting>

In this security-setting block the match 'globalqueues.europe.orders.#' is more specific than the previous match 'globalqueues.europe.#'. So any addresses which match 'globalqueues.europe.orders.#' will take their security settings only from the latter security-setting block.

Note that settings are not inherited from the former block. All the settings will be taken from the more specific matching block, so for the address 'globalqueues.europe.orders.plastics' the only permissions that exist are send and consume for the role europe-users. The permissions createDurableQueue, deleteDurableQueue, createNonDurableQueue, deleteNonDurableQueue are not inherited from the other security-setting block.

By not inheriting permissions, it allows you to effectively deny permissions in more specific security-setting blocks by simply not specifying them. Otherwise it would not be possible to deny permissions in sub-groups of addresses.

Secure Sockets Layer (SSL) Transport

When messaging clients are connected to servers, or servers are connected to other servers (e.g. via bridges) over an untrusted network then Apache ActiveMQ Artemis allows that traffic to be encrypted using the Secure Sockets Layer (SSL) transport.

For more information on configuring the SSL transport, please see Configuring the Transport.

User credentials

Apache ActiveMQ Artemis ships with two security manager implementations:

The legacy, deprecated ActiveMQSecurityManager that reads user credentials, i.e. user names, passwords and role information from properties files on the classpath called artemis-users.properties and artemis-roles.properties. This is the default security manager.
The flexible, pluggable ActiveMQJAASSecurityManager which supports any standard JAAS login module. Artemis ships with several login modules which will be discussed further down.

Non-JAAS Security Manager

If you wish to use the legacy, deprecated ActiveMQSecurityManager, then it needs to be added to the bootstrap.xml configuration. Lets take a look at what this might look like:

<basic-security>
  <users>file:${activemq.home}/config/non-clustered/artemis-users.properties</users>
  <roles>file:${activemq.home}/config/non-clustered/artemis-roles.properties</roles>
  <default-user>guest</default-user>
</basic-security>

The first 2 elements users and roles define what properties files should be used to load in the users and passwords.

The next thing to note is the element defaultuser. This defines what user will be assumed when the client does not specify a username/password when creating a session. In this case they will be the user guest. Multiple roles can be specified for a default user in the artemis-roles.properties.

Lets now take a look at the artemis-users.properties file, this is basically just a set of key value pairs that define the users and their password, like so:

bill=activemq
andrew=activemq1
frank=activemq2
sam=activemq3

The artemis-roles.properties defines what groups these users belong too where the key is the user and the value is a comma separated list of the groups the user belongs to, like so:

bill=user
andrew=europe-user,user
frank=us-user,news-user,user
sam=news-user,user

JAAS Security Manager

When using JAAS much of the configuration depends on which login module is used. However, there are a few commonalities for every case. Just like in the non-JAAS use-case, the first place to look is in bootstrap.xml. Here is an example using the PropertiesLogin JAAS login module which reads user, password, and role information from properties files much like the non-JAAS security manager implementation:

<jaas-security login-module="PropertiesLogin"/>

No matter what login module you're using, you'll need to specify it here in bootstrap.xml. The login-module attribute here refers to the relevant login module entry in login.config. For example:

PropertiesLogin {
    org.apache.activemq.artemis.spi.core.security.jaas.PropertiesLoginModule required
        debug=true
        org.apache.activemq.jaas.properties.user="artemis-users.properties"
        org.apache.activemq.jaas.properties.role="artemis-roles.properties";
};

The login.config file is a standard JAAS configuration file. You can read more about this file on Oracle's website. In short, the file defines:

an alias for a configuration (e.g. PropertiesLogin)
the implementation class (e.g. org.apache.activemq.artemis.spi.core.security.jaas.PropertiesLoginModule)
a flag which indicates whether the success of the LoginModule is required, requisite, sufficient, or optional
a list of configuration options specific to the login module implementation

By default, the location and name of login.config is specified on the Artemis command-line which is set by etc/artemis.profile on linux and etc\artemis.profile.cmd on Windows.

GuestLoginModule

Allows users without credentials (and, depending on how it is configured, possibly also users with invalid credentials) to access the broker. Normally, the guest login module is chained with another login module, such as a properties login module. It is implemented by org.apache.activemq.artemis.spi.core.security.jaas.GuestLoginModule.

org.apache.activemq.jaas.guest.user - the user name to assign; default is "guest"
org.apache.activemq.jaas.guest.role - the role name to assign; default is "guests"
credentialsInvalidate - boolean flag; if true, reject login requests that include a password (i.e. guest login succeeds only when the user does not provide a password); default is false
debug - boolean flag; if true, enable debugging; this is used only for testing or debugging; normally, it should be set to false, or omitted; default is false

There are two basic use cases for the guest login module, as follows:

Guests with no credentials or invalid credentials.
Guests with no credentials only.

The following snippet shows how to configure a JAAS login entry for the use case where users with no credentials or invalid credentials are logged in as guests. In this example, the guest login module is used in combination with the properties login module.

activemq-domain {
  org.apache.activemq.artemis.spi.core.security.jaas.PropertiesLoginModule sufficient
      debug=true
      org.apache.activemq.jaas.properties.user="artemis-users.properties"
      org.apache.activemq.jaas.properties.role="artemis-roles.properties";

  org.apache.activemq.artemis.spi.core.security.jaas.GuestLoginModule sufficient
      debug=true
      org.apache.activemq.jaas.guest.user="anyone"
      org.apache.activemq.jaas.guest.role="restricted";
};

Depending on the user login data, authentication proceeds as follows:

User logs in with a valid password — the properties login module successfully authenticates the user and returns immediately. The guest login module is not invoked.
User logs in with an invalid password — the properties login module fails to authenticate the user, and authentication proceeds to the guest login module. The guest login module successfully authenticates the user and returns the guest principal.
User logs in with a blank password — the properties login module fails to authenticate the user, and authentication proceeds to the guest login module. The guest login module successfully authenticates the user and returns the guest principal.

The following snipped shows how to configure a JAAS login entry for the use case where only those users with no credentials are logged in as guests. To support this use case, you must set the credentialsInvalidate option to true in the configuration of the guest login module. You should also note that, compared with the preceding example, the order of the login modules is reversed and the flag attached to the properties login module is changed to requisite.

activemq-guest-when-no-creds-only-domain {
    org.apache.activemq.artemis.spi.core.security.jaas.GuestLoginModule sufficient
        debug=true
       credentialsInvalidate=true
       org.apache.activemq.jaas.guest.user="guest"
       org.apache.activemq.jaas.guest.role="guests";

    org.apache.activemq.artemis.spi.core.security.jaas.PropertiesLoginModule requisite
        debug=true
        org.apache.activemq.jaas.properties.user="artemis-users.properties"
        org.apache.activemq.jaas.properties.role="artemis-roles.properties";
};

Depending on the user login data, authentication proceeds as follows:

User logs in with a valid password — the guest login module fails to authenticate the user (because the user has presented a password while the credentialsInvalidate option is enabled) and authentication proceeds to the properties login module. The properties login module sucessfully authenticates the user and returns.
User logs in with an invalid password — the guest login module fails to authenticate the user and authentication proceeds to the properties login module. The properties login module also fails to authenticate the user. The nett result is authentication failure.
User logs in with a blank password — the guest login module successfully authenticates the user and returns immediately. The properties login module is not invoked.

PropertiesLoginModule

The JAAS properties login module provides a simple store of authentication data, where the relevant user data is stored in a pair of flat files. This is convenient for demonstrations and testing, but for an enterprise system, the integration with LDAP is preferable. It is implemented by org.apache.activemq.artemis.spi.core.security.jaas.PropertiesLoginModule.

org.apache.activemq.jaas.properties.user - the path to the file which contains user and password properties
org.apache.activemq.jaas.properties.role - the path to the file which contains user and role properties
debug - boolean flag; if true, enable debugging; this is used only for testing or debugging; normally, it should be set to false, or omitted; default is false

In the context of the properties login module, the artemis-users.properties file consists of a list of properties of the form, UserName=Password. For example, to define the users system, user, and guest, you could create a file like the following:

system=manager
user=password
guest=password

The artemis-roles.properties file consists of a list of properties of the form, Role=UserList, where UserList is a comma-separated list of users. For example, to define the roles admins, users, and guests, you could create a file like the following:

admins=system
users=system,user
guests=guest

LDAPLoginModule

The LDAP login module enables you to perform authentication and authorization by checking the incoming credentials against user data stored in a central X.500 directory server. For systems that already have an X.500 directory server in place, this means that you can rapidly integrate ActiveMQ Artemis with the existing security database and user accounts can be managed using the X.500 system. It is implemented by org.apache.activemq.artemis.spi.core.security.jaas.LDAPLoginModule.

initialContextFactory - must always be set to com.sun.jndi.ldap.LdapCtxFactory
connectionURL - specify the location of the directory server using an ldap URL, ldap://Host:Port. You can optionally qualify this URL, by adding a forward slash, /, followed by the DN of a particular node in the directory tree. For example, ldap://ldapserver:10389/ou=system.
authentication - specifies the authentication method used when binding to the LDAP server. Can take either of the values, simple (username and password) or none (anonymous).
connectionUsername - the DN of the user that opens the connection to the directory server. For example, uid=admin,ou=system. Directory servers generally require clients to present username/password credentials in order to open a connection.
connectionPassword - the password that matches the DN from connectionUsername. In the directory server, in the DIT, the password is normally stored as a userPassword attribute in the corresponding directory entry.
connectionProtocol - currently, the only supported value is a blank string. In future, this option will allow you to select the Secure Socket Layer (SSL) for the connection to the directory server. This option must be set explicitly to an empty string, because it has no default value.
userBase - selects a particular subtree of the DIT to search for user entries. The subtree is specified by a DN, which specifes the base node of the subtree. For example, by setting this option to ou=User,ou=ActiveMQ,ou=system, the search for user entries is restricted to the subtree beneath the ou=User,ou=ActiveMQ,ou=system node.
userSearchMatching - specifies an LDAP search filter, which is applied to the subtree selected by userBase. Before passing to the LDAP search operation, the string value you provide here is subjected to string substitution, as implemented by the java.text.MessageFormat class. Essentially, this means that the special string, {0}, is substituted by the username, as extracted from the incoming client credentials.

After substitution, the string is interpreted as an LDAP search filter, where the LDAP search filter syntax is defined by the IETF standard, RFC 2254. A short introduction to the search filter syntax is available from Oracle's JNDI tutorial, Search Filters.

For example, if this option is set to (uid={0}) and the received username is jdoe, the search filter becomes (uid=jdoe) after string substitution. If the resulting search filter is applied to the subtree selected by the user base, ou=User,ou=ActiveMQ,ou=system, it would match the entry, uid=jdoe,ou=User,ou=ActiveMQ,ou=system (and possibly more deeply nested entries, depending on the specified search depth—see the userSearchSubtree option).
userSearchSubtree - specify the search depth for user entries, relative to the node specified by userBase. This option is a boolean. false indicates it will try to match one of the child entries of the userBase node (maps to javax.naming.directory.SearchControls.ONELEVEL_SCOPE). true indicates it will try to match any entry belonging to the subtree of the userBase node (maps to javax.naming.directory.SearchControls.SUBTREE_SCOPE).
userRoleName - specifies the name of the multi-valued attribute of the user entry that contains a list of role names for the user (where the role names are interpreted as group names by the broker's authorization plug-in). If you omit this option, no role names are extracted from the user entry.
roleBase - if you want to store role data directly in the directory server, you can use a combination of role options (roleBase, roleSearchMatching, roleSearchSubtree, and roleName) as an alternative to (or in addition to) specifying the userRoleName option. This option selects a particular subtree of the DIT to search for role/group entries. The subtree is specified by a DN, which specifes the base node of the subtree. For example, by setting this option to ou=Group,ou=ActiveMQ,ou=system, the search for role/group entries is restricted to the subtree beneath the ou=Group,ou=ActiveMQ,ou=system node.
roleName - specifies the attribute type of the role entry that contains the name of the role/group (e.g. C, O, OU, etc.). If you omit this option, the role search feature is effectively disabled.
roleSearchMatching - specifies an LDAP search filter, which is applied to the subtree selected by roleBase. This works in a similar manner to the userSearchMatching option, except that it supports two substitution strings, as follows:
- {0} - substitutes the full DN of the matched user entry (that is, the result of the user search). For example, for the user, jdoe, the substituted string could be uid=jdoe,ou=User,ou=ActiveMQ,ou=system.
- {1} - substitutes the received username. For example, jdoe.
For example, if this option is set to (member=uid={1}) and the received username is jdoe, the search filter becomes (member=uid=jdoe) after string substitution (assuming ApacheDS search filter syntax). If the resulting search filter is applied to the subtree selected by the role base, ou=Group,ou=ActiveMQ,ou=system, it matches all role entries that have a member attribute equal to uid=jdoe (the value of a member attribute is a DN).

This option must always be set, even if role searching is disabled, because it has no default value.

If you use OpenLDAP, the syntax of the search filter is (member:=uid=jdoe).
roleSearchSubtree - specify the search depth for role entries, relative to the node specified by roleBase. This option can take boolean values, as follows:
- false (default) - try to match one of the child entries of the roleBase node (maps to javax.naming.directory.SearchControls.ONELEVEL_SCOPE).
- true — try to match any entry belonging to the subtree of the roleBase node (maps to javax.naming.directory.SearchControls.SUBTREE_SCOPE).
debug - boolean flag; if true, enable debugging; this is used only for testing or debugging; normally, it should be set to false, or omitted; default is false

Add user entries under the node specified by the userBase option. When creating a new user entry in the directory, choose an object class that supports the userPassword attribute (for example, the person or inetOrgPerson object classes are typically suitable). After creating the user entry, add the userPassword attribute, to hold the user's password.

If you want to store role data in dedicated role entries (where each node represents a particular role), create a role entry as follows. Create a new child of the roleBase node, where the objectClass of the child is groupOfNames. Set the cn (or whatever attribute type is specified by roleName) of the new child node equal to the name of the role/group. Define a member attribute for each member of the role/group, setting the member value to the DN of the corresponding user (where the DN is specified either fully, uid=jdoe,ou=User,ou=ActiveMQ,ou=system, or partially, uid=jdoe).

If you want to add roles to user entries, you would need to customize the directory schema, by adding a suitable attribute type to the user entry's object class. The chosen attribute type must be capable of handling multiple values.

Changing the username/password for clustering

In order for cluster connections to work correctly, each node in the cluster must make connections to the other nodes. The username/password they use for this should always be changed from the installation default to prevent a security risk.

Please see Management for instructions on how to do this.

24 KiB Raw Blame History