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Difference between revisions of "Jetty/Tutorial/Realms"

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| details =
 
| details =
  
Realm definitions in Jetty configuration files are placed in a section like this:
+
A realm - known as a LoginService - can be made available to all web applications on a Server instance by defining it in a jetty configuration file, for example $JETTY_HOME/etc/jetty.xml. Here's an example of defining an in-memory type of LoginService called the HashLoginService (note in jetty-6 this was called the HashUserRealm):
  
 
<source lang="xml">
 
<source lang="xml">
<Set name="UserRealms">
+
<Configure id="Server" class="org.eclipse.jetty.server.Server">
  <Array type="org.eclipse.jetty.security.UserRealm">
+
    <Item>
+
      ...
+
    </Item>
+
    <Item>
+
    ...
+
    </Item>
+
  
     ...
+
     <Call name="addBean">
 +
      <Arg>
 +
        <New class="org.eclipse.jetty.security.HashLoginService">
 +
          <Set name="name">Test Realm</Set>
 +
          <Set name="config"><SystemProperty name="jetty.home" default="."/>/etc/realm.properties</Set>
 +
          <Set name="refreshInterval">0</Set>
 +
        </New>
 +
      </Arg>
 +
    </Call>
  
  </Array>
+
 
</Set>
+
</Configure>
 
</source>
 
</source>
  
Alternatively, you may define a realm for just a single webapp in a ContextDeployer file:
+
Alternatively, you may define a LoginService for just a single web application in a context file. Here's how you would define the same HashLoginService but inside
 +
a context xml file instead:
 +
 
 
<source lang="xml">
 
<source lang="xml">
 
<Configure class="org.eclipse.jetty.webapp.WebAppContext">
 
<Configure class="org.eclipse.jetty.webapp.WebAppContext">
 
   <Set name="contextPath">/test</Set>
 
   <Set name="contextPath">/test</Set>
 
   <Set name="war"><SystemProperty name="jetty.home" default="."/>/webapps/test</Set>
 
   <Set name="war"><SystemProperty name="jetty.home" default="."/>/webapps/test</Set>
    ...
+
 
 
   <Get name="securityHandler">
 
   <Get name="securityHandler">
     <Set name="userRealm">
+
     <Set name="loginService">
       <New class="org.eclipse.jetty.security.HashUserRealm">
+
       <New class="org.eclipse.jetty.security.HashLoginService">
 
             <Set name="name">Test Realm</Set>
 
             <Set name="name">Test Realm</Set>
 
             <Set name="config"><SystemProperty name="jetty.home" default="."/>/etc/realm.properties</Set>
 
             <Set name="config"><SystemProperty name="jetty.home" default="."/>/etc/realm.properties</Set>
Line 39: Line 42:
 
     </Set>
 
     </Set>
 
   </Get>
 
   </Get>
 +
 
</Configure>
 
</Configure>
 
</source>
 
</source>
  
Jetty provides a number of different realm types from which you can choose.
+
Jetty provides a number of different LoginService types from which you can choose.
  
=== HashUserRealm ===
+
=== HashLoginService ===
  
This realm is a simple realm whose authentication and authorization information is stored in a properties file. Each line in the file contains a username, a password, and 0 or more role assignments. The format is:
+
This LoginService is a simple realm whose authentication and authorization information is stored in a properties file. Each line in the file contains a username, a password, and 0 or more role assignments. The format is:
 
  username: password[,rolename ...]
 
  username: password[,rolename ...]
  
Line 59: Line 63:
 
  guest: guest,read-only
 
  guest: guest,read-only
  
The HashUserRealm is configured with a name and a reference to the location of the properties file:
+
The HashLoginService is configured with a name and a reference to the location of the properties file:
 
<source lang="xml">
 
<source lang="xml">
 
<Item>
 
<Item>
   <New class="org.eclipse.jetty.security.HashUserRealm">
+
   <New class="org.eclipse.jetty.security.HashLoginService">
 
     <Set name="name">Test Realm</Set>
 
     <Set name="name">Test Realm</Set>
 
     <Set name="config"><SystemProperty name="jetty.home" default="."/>/etc/realm.properties</Set>
 
     <Set name="config"><SystemProperty name="jetty.home" default="."/>/etc/realm.properties</Set>
Line 71: Line 75:
 
are detected. The reloadInterval is in seconds:
 
are detected. The reloadInterval is in seconds:
 
<source lang="xml">
 
<source lang="xml">
<Item>
+
 
   <New class="org.mortbay.jetty.security.HashUserRealm">
+
   <New class="org.eclipse.jetty.security.HashLoginService">
 
     <Set name="name">Test Realm</Set>
 
     <Set name="name">Test Realm</Set>
 
     <Set name="config"><SystemProperty name="jetty.home" default="."/>/etc/realm.properties</Set>
 
     <Set name="config"><SystemProperty name="jetty.home" default="."/>/etc/realm.properties</Set>
Line 78: Line 82:
 
     <Call name="start"></Call>
 
     <Call name="start"></Call>
 
   </New>
 
   </New>
</Item>
+
 
 
</source>
 
</source>
  
=== JDBCUserRealm ===
+
=== JDBCLoginService ===
  
 
In this implementation, authentication and role information is stored in a database accessed via JDBC. A properties file defines the JDBC connection and database table information. Below is an example of a properties file for this realm implementation:
 
In this implementation, authentication and role information is stored in a database accessed via JDBC. A properties file defines the JDBC connection and database table information. Below is an example of a properties file for this realm implementation:
Line 148: Line 152:
 
If you want to use obfuscated, MD5 hashed or encrypted passwords the 'pwd' column of the 'users' table must be large enough to hold the obfuscated, hashed or encrypted password text plus the appropriate prefix.
 
If you want to use obfuscated, MD5 hashed or encrypted passwords the 'pwd' column of the 'users' table must be large enough to hold the obfuscated, hashed or encrypted password text plus the appropriate prefix.
  
A JDBCRealm is defined with the name of the realm and the location of the properties file describing the database:
+
A JDBCLoginService is defined with the name of the realm and the location of the properties file describing the database:
 
<source lang="xml">
 
<source lang="xml">
<Item>
+
 
   <New class="org.eclipse.jetty.security.JDBCUserRealm">
+
   <New class="org.eclipse.jetty.security.JDBCLoginService">
 
   <Set name="name">Test JDBC Realm</Set>
 
   <Set name="name">Test JDBC Realm</Set>
 
   <Set name="config">etc/jdbcRealm.properties</Set>
 
   <Set name="config">etc/jdbcRealm.properties</Set>
 
   </New>
 
   </New>
</Item>
+
 
 
</source>
 
</source>
 
| more =
 
| more =

Revision as of 11:59, 5 March 2010



Introduction

This tutorial describes how to configure security realms to provide authentication and access control for web applications running in Jetty. A realm has a unique name, and is composed of a set of users. Each user has authentication information (e.g. a password) and a set of roles associated with him/herself.

You may configure one or many different realms depending on your needs. A single realm would indicate that you wish to share common security information across all of your web applications. Distinct realms allow you to partition your security information webapp by webapp.

Details

A realm - known as a LoginService - can be made available to all web applications on a Server instance by defining it in a jetty configuration file, for example $JETTY_HOME/etc/jetty.xml. Here's an example of defining an in-memory type of LoginService called the HashLoginService (note in jetty-6 this was called the HashUserRealm):

<Configure id="Server" class="org.eclipse.jetty.server.Server">
 
    <Call name="addBean">
      <Arg>
        <New class="org.eclipse.jetty.security.HashLoginService">
          <Set name="name">Test Realm</Set>
          <Set name="config"><SystemProperty name="jetty.home" default="."/>/etc/realm.properties</Set>
          <Set name="refreshInterval">0</Set>
        </New>
      </Arg>
    </Call>
 
 
</Configure>

Alternatively, you may define a LoginService for just a single web application in a context file. Here's how you would define the same HashLoginService but inside a context xml file instead:

<Configure class="org.eclipse.jetty.webapp.WebAppContext">
  <Set name="contextPath">/test</Set>
  <Set name="war"><SystemProperty name="jetty.home" default="."/>/webapps/test</Set>
 
  <Get name="securityHandler">
    <Set name="loginService">
      <New class="org.eclipse.jetty.security.HashLoginService">
            <Set name="name">Test Realm</Set>
            <Set name="config"><SystemProperty name="jetty.home" default="."/>/etc/realm.properties</Set>
      </New>
    </Set>
  </Get>
 
</Configure>

Jetty provides a number of different LoginService types from which you can choose.

HashLoginService

This LoginService is a simple realm whose authentication and authorization information is stored in a properties file. Each line in the file contains a username, a password, and 0 or more role assignments. The format is:

username: password[,rolename ...]

where:

  • username is the user's unique identity;
  • password is the user's (possibly obfuscated or MD5 encrypted) password;
  • rolename is the user's role.

For example:

admin: CRYPT:ad1ks..kc.1Ug,server-administrator,content-administrator,admin
other: OBF:1xmk1w261u9r1w1c1xmq
guest: guest,read-only

The HashLoginService is configured with a name and a reference to the location of the properties file:

<Item>
  <New class="org.eclipse.jetty.security.HashLoginService">
     <Set name="name">Test Realm</Set>
    <Set name="config"><SystemProperty name="jetty.home" default="."/>/etc/realm.properties</Set>
  </New>
</Item>

You can also configure it to check the properties file regularly for changes and reload when changes are detected. The reloadInterval is in seconds:

  <New class="org.eclipse.jetty.security.HashLoginService">
    <Set name="name">Test Realm</Set>
    <Set name="config"><SystemProperty name="jetty.home" default="."/>/etc/realm.properties</Set>
    <Set name="reloadInterval">5</Set>
    <Call name="start"></Call>
  </New>

JDBCLoginService

In this implementation, authentication and role information is stored in a database accessed via JDBC. A properties file defines the JDBC connection and database table information. Below is an example of a properties file for this realm implementation:

jdbcdriver = org.gjt.mm.mysql.Driver
url = jdbc:mysql://localhost/jetty
username = jetty
password = jetty
usertable = users
usertablekey = id
usertableuserfield = username
usertablepasswordfield = pwd
roletable = roles
roletablekey = id
roletablerolefield = role
userroletable = user_roles
userroletableuserkey = user_id
userroletablerolekey = role_id
cachetime = 300

The format of the database tables is (pseudo-sql):

users
(
  id INTEGER PRIMARY KEY,
  username VARCHAR(100) NOT NULL UNIQUE KEY,
  pwd VARCHAR(50) NOT NULL
);
user_roles
(
  user_id INTEGER NOT NULL,
  role_id INTEGER NOT NULL,
  UNIQUE KEY (user_id, role_id),
  INDEX(user_id)
);
roles
(
  id INTEGER PRIMARY KEY,
  ROLE VARCHAR(100) NOT NULL UNIQUE KEY
);

Where:

  • users is a table containing one entry for every user consisting of:
    • id - the unique identity of a user
    • user - the name of the user
    • pwd - the user's password (possibily obfuscated or MD5 encrypted)
  • user-roles is a table containing one row for every role granted to a user:
    • user_id - the unique identity of the user
    • role_id - the role for a user
  • roles is a a table containing one role for every role in the system:
    • id is the unique identifier of a role
    • role is a human-readable name for a role

If you want to use obfuscated, MD5 hashed or encrypted passwords the 'pwd' column of the 'users' table must be large enough to hold the obfuscated, hashed or encrypted password text plus the appropriate prefix.

A JDBCLoginService is defined with the name of the realm and the location of the properties file describing the database:

  <New class="org.eclipse.jetty.security.JDBCLoginService">
  <Set name="name">Test JDBC Realm</Set>
  <Set name="config">etc/jdbcRealm.properties</Set>
  </New>

Additional Resources

See Java Authentication and Authorization Service (JAAS) tutorial for additional information about configuring security realms.

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