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Support Article

IllegalBlockSizeException thrown trying to login after upgrade



Errors occurred when the application was updated from Pega 7.1.6 to Pega 7.1.7.

Error Messages

[1/12/15 20:29:20:908 EST] 00000095 SystemOut     O 2015-01-12 20:29:20,906 [    WebContainer : 1] [  STANDARD] [                    ] [                    ] (ernal.authorization.ContextMap) ERROR <HOST>|<IP Address>  - Error while decoding access group (PRSecServlet/8ocUd_nMQ30_O4DyweUtkg[[*)
javax.crypto.IllegalBlockSizeException: Input length (with padding) not multiple of 8 bytes
        at Source)
        at Source)

Steps to Reproduce

Log in through Siteminder authentication screen with subsequent URL redirect to PRCustomServlet.

Root Cause

A defect or misconfiguration in the PRPC operating environment:
The SSO login worked in Pega 7.1.6, but the same setup with Siteminder SSO results in the error in Pega 7.1.7. PRCustomServlet was assumed to be configured the same way in both environments, but web.xml of the deployed-PRPC EAR revealed that it did not have the necessary Servlet definition information for PRCustom authentication servlet.


Perform the following local-change:
Modify web.xml of the deployed PRPC archive and update it with the necessary information for PRCustom form of Authentication.

Published October 18, 2016 - Updated October 8, 2020

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