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Java Network Security Overview

Java Network Security Overview. Paul Flynn 21 Sep 2005. Overview. Authentication BASIC Example Forms Example JAAS Usage Using SSL Generate a certificate Deploy on Tomcat Demo Crypto Overview. Basic. Works like .net basic Specify user database in XML file

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Java Network Security Overview

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  1. Java Network Security Overview Paul Flynn 21 Sep 2005

  2. Overview • Authentication • BASIC Example • Forms Example • JAAS Usage • Using SSL • Generate a certificate • Deploy on Tomcat • Demo • Crypto Overview

  3. Basic • Works like .net basic • Specify user database in XML file • Can use Tomcat manager to handle users • Specify in web.xml

  4. Basic • - <security-constraint> • <display-name>Example Security Constraint</display-name> • - <web-resource-collection> • <web-resource-name>Protected Area</web-resource-name> <!-- Define the context-relative URL(s) to be protected --> • <url-pattern>/testbasic.html</url-pattern> • </web-resource-collection> • - <auth-constraint> <!-- Anyone with one of the listed roles may access this area --> • <role-name>dbadmin</role-name> • </auth-constraint> • </security-constraint> • - <security-constraint> • <display-name>Example Security Constraint</display-name> • - <web-resource-collection> • <web-resource-name>Protected JPG</web-resource-name> <!-- Define the context-relative URL(s) to be protected --> • <url-pattern>*.jpg</url-pattern> • </web-resource-collection> • - <auth-constraint> <!-- Anyone with one of the listed roles may access this area --> • <role-name>dbadmin</role-name> • </auth-constraint> • </security-constraint> • - <security-constraint> • <display-name>Exlcude Gifs</display-name> • - <web-resource-collection> • <web-resource-name>Gifs ok</web-resource-name> • <url-pattern>*.gif</url-pattern> • </web-resource-collection> • </security-constraint> <!-- Default login configuration uses form-based authentication --> • - <login-config> • <auth-method>BASIC</auth-method> • <realm-name>Tomcat Manager Application</realm-name> • </login-config> <!-- Security roles referenced by this web application --> • - <security-role> • <role-name>dbadmin</role-name> • </security-role> • </web-app>

  5. Forms • Designated in web.xml • Action = “j_security_check” • Username parameter= “j_user_name” • Password param= “j_password” • Designate a login page and error page

  6. - <security-constraint> • <display-name>Example Security Constraint</display-name> • - <web-resource-collection> • <web-resource-name>Protected JPG</web-resource-name> <!-- Define the context-relative URL(s) to be protected --> • <url-pattern>*.jpg</url-pattern> • </web-resource-collection> • - <auth-constraint> <!-- Anyone with one of the listed roles may access this area --> • <role-name>manager</role-name> • </auth-constraint> • </security-constraint> • - <security-constraint> • <display-name>Exlcude Gifs</display-name> • - <web-resource-collection> • <web-resource-name>Gifs ok</web-resource-name> • <url-pattern>*.gif</url-pattern> • </web-resource-collection> • </security-constraint> <!-- Default login configuration uses form-based authentication --> • - <login-config> • <auth-method>FORM</auth-method> • <realm-name>Forms test</realm-name> • - <form-login-config> • <form-login-page>/login.jsp</form-login-page> • <form-error-page>/error.jsp</form-error-page> • </form-login-config> • </login-config>

  7. JAAS • Plug-in very flexible • Very hard to configure • Tomcat ? • Appllication Servers – JBoss

  8. JAAS • Subclass LoginModule • Initialize() , login(), commit(), abort(),logout() • Declare JAAS Config file • WebLogin { • com.jspservletcookbook.DataSourceLoginModule requisite; • };

  9. Generate Certificate for SSL • Use the “keytool” command • Alternate use certificate from provider >keytool -genkey -alias tomcat -keyalg RSA Enter keystore password: changeit What is your first and last name? [Unknown]: Paul Flynn What is the name of your organizational unit? [Unknown]: CS872 What is the name of your organization? [Unknown]: ODU What is the name of your City or Locality? [Unknown]: Norfolk What is the name of your State or Province? [Unknown]: VA What is the two-letter country code for this unit? [Unknown]: VA Is CN=Paul Flynn, OU=CS872, O=ODU, L=Norfolk, ST=VA, C=VA correct? [no]: yes Enter key password for <tomcat> (RETURN if same as keystore password):

  10. Enable Tomcat Connector • Simply uncomment provided Connector in server.xml <Connector className="org.apache.coyote.tomcat4.CoyoteConnector" port="8443" minProcessors="5" maxProcessors="75" enableLookups="true" acceptCount="100" debug="0" scheme="https" secure="true" useURIValidationHack="false" disableUploadTimeout="true"> <Factory className="org.apache.coyote.tomcat4.CoyoteServerSocketFactory" clientAuth="false" protocol="TLS" /> </Connector>

  11. Cookies and Sessions • See examples: • Cookies-http://localhost:8080/examples/servlet/CookieExample • Sessions-http://localhost:8080/examples/servlet/SessionExample

  12. Signing Jars • Make a certificate (like for SSL) • Use jarsigner Jarsigner – keystore myKeystore test.jar mycert

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