Method processChallenge

src/SecureRpcHelper.java:280–303

Handles passing a buffer off to the sasl client for challenge evaluation @param b The buffer to process @return The results of the challenge if successful, or null if there was a SaslException. @throws IllegalStateException when processing of the action failed due to a PrivilegedActionException

(final byte[] b)

   * a PrivilegedActionException
   */
  protected byte[] processChallenge(final byte[] b) {
    try {
      final class PrivilegedAction implements PrivilegedExceptionAction<byte[]> {
        @Override
        public byte[] run() {
          try {
            return sasl_client.evaluateChallenge(b);
          } catch (SaslException e) {
            LOG.error("Failed Sasl challenge", e);
            return null;
          }
        }
        @Override
        public String toString() {
          return "evaluate sasl challenge";
        }
      }
      
      return Subject.doAs(client_auth_provider.getClientSubject(),
          new PrivilegedAction());
    } catch (PrivilegedActionException e) {
      throw new IllegalStateException("Failed to process challenge", e);
    }
  }

}