PI17836: CWWKS4106E: LTPA CONFIGURATION ERROR WHEN SETTING KEYSPASSWORD IN THE SERVER.XML

8.5.5.4: WebSphere Application Server V8.5.5 Fix Pack 4
8.5.5.5: WebSphere Application Server V8.5.5 Fix Pack 5
8.5.5.6: WebSphere Application Server V8.5.5 Fix Pack 6
8.5.5.7: WebSphere Application Server V8.5.5 Fix Pack 7
8.5.5.8: WebSphere Application Server V8.5.5 Fix Pack 8
8.5.5.9: WebSphere Application Server V8.5.5 Fix Pack 9
8.5.5.10: WebSphere Application Server V8.5.5 Fix Pack 10
8.5.5.11: WebSphere Application Server V8.5.5 Fix Pack 11
8.5.5.12: WebSphere Application Server V8.5.5 Fix Pack 12
8.5.5.13: WebSphere Application Server V8.5.5 Fix Pack 13
8.5.5.14: WebSphere Application Server V8.5.5 Fix Pack 14
8.5.5.15: WebSphere Application Server V8.5.5 Fix Pack 15
8.5.5.14: WebSphere Application Server V8.5.5 Fix Pack 14
8.5.5.17: WebSphere Application Server V8.5.5 Fix Pack 17
8.5.5.20: WebSphere Application Server V8.5.5.20
8.5.5.18: WebSphere Application Server V8.5.5 Fix Pack 18
8.5.5.19: WebSphere Application Server V8.5.5 Fix Pack 19
8.5.5.16: WebSphere Application Server V8.5.5 Fix Pack 16
8.5.5.21: WebSphere Application Server V8.5.5.21

APAR status

• Closed as program error.

Error description

• Ø
  Running WebSphere Application Server Liberty Core version
  8.5.5.2, when setting the keysPassword in the ltpa
  element in the server.xml with AES
  
  <ltpa
  keysFileName="${server.output.dir}/resources/security/ltpa.keys"
  keysPassword="{aes}ACwKKSNZmsIEqeR4lyWXK9Zr7oE3sWGjQzhorVPJnLwT"
  expiration="120"/>
  
  getting exceptions during server startup:
  
  com.ibm.ws.security.token.ltpa.internal.LTPAKeyInfoManager   1
  Error loading key; javax.crypto.BadPaddingException: Given
  final block not properly padded
  
  om.ibm.ws.security.token.ltpa.internal.LTPAConfigurationImpl >
  getKeyFile Entry
  
  om.ibm.ws.security.token.ltpa.internal.LTPAConfigurationImpl <
  getKeyFile Exit
  
  
  /opt/IBM/tivoli/impact/wlp/usr/servers/NCI/resources/security/lt
  pa.keys
  
  com.ibm.ws.security.token.ltpa.internal.LTPAKeyCreator       E
  CWWKS4106E: LTPA configuration error. Unable to create or read
  LTPA key file:
  /opt/IBM/tivoli/impact/wlp/usr/servers/NCI/resources/security/lt
  pa.keys
  

Local fix

• n/a
  

Problem summary

• ****************************************************************
  * USERS AFFECTED:  All users of IBM WebSphere Application      *
  *                  Server Liberty Profile.                     *
  ****************************************************************
  * PROBLEM DESCRIPTION: BadPaddingException occurs when LTPA    *
  *                      keys are configured to use AES          *
  *                      encryption.                             *
  ****************************************************************
  * RECOMMENDATION:                                              *
  ****************************************************************
  LTPA keys can be configured to use various encryption  protocols
  via the <ltpa/> element in the Liberty server.xml file. When the
  AES encryption protocol is used the customer could see
  BadPaddingException during server start up.
  

Problem conclusion

• Code has been changed to correctly process AES encryption.
  The fix for this APAR is currently targeted for inclusion in fix
  pack 8.5.5.4. Please refer to the Recommended Updates page for
  delivery information:
  http://www.ibm.com/support/docview.wss?rs=180&uid=swg27004980
  

Temporary fix

Comments

APAR Information

• APAR is sysrouted FROM one or more of the following:

• APAR is sysrouted TO one or more of the following:

Fix information

• Fixed component name

  WAS LIBERTY COR

• Fixed component ID

  5725L2900

Applicable component levels

• R855 PSY

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