[jbossseam-issues] [JBoss JIRA] Created: (JBSEAM-4398) RememberMe Issue - Base 64 encoded cookie containing '=' is not processed correctly in some cases

Peter Goldstein (JIRA) jira-events at lists.jboss.org
Mon Aug 31 05:03:23 EDT 2009

RememberMe Issue - Base 64 encoded cookie containing '=' is not processed correctly in some cases

                 Key: JBSEAM-4398
                 URL: https://jira.jboss.org/jira/browse/JBSEAM-4398
             Project: Seam
          Issue Type: Bug
    Affects Versions: 2.2.0.GA, 2.1.2.GA
         Environment: Observed on Windows Vista, JBoss 5.1.0 GA.  Problem likely exists on other operating systems and other Tomcat 6 based systems.
            Reporter: Peter Goldstein

When attempting to use the RememberMe component in auto-login mode I discovered a bug in the cookie handling of this component.

When attempting to log using an auth token I was encountering repeated failures - the token was simply not being found in the database. After some investigation I discovered that the problem was that the value parameter passed into the query was truncated by one character - the last character was cut off.

I tracked the problem further back, and discovered that the truncated value originated in JBoss' Tomcat. The cookie value being passed in was missing the last two '=' characters.

Some Google searching revealed that this was deliberate - Tomcat 6 in the JBoss 5.1.0 GA configuration enforces strict character rules in the cookie value, which excludes '='.

I'm not sure if Tomcat 6 is 'right' or not, but I do know that either way, this is a trivial issue to address on the Seam side.

All one has to do is replace the '=' from the Base64 encoded token value with another allowed character (say '_' or '-') before placing it in a cookie, and reverse the process when reading a cookie.

I have a patch for this issue on the 2.2.0 GA code.  I simply need to know how to submit it.

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