IJ10491: AES/GCM CIPHER - AAD NOT RESET TO UN-INIT STATE AFTER DOFINAL( ) AND INIT( )

APAR status

• Closed as program error.

Error description

• Error Message: N/A
  .
  Stack Trace: N/A
  .
  When the same AES/GCM cipher object is used to perform both the
  encryption and the decryption of a piece of data, the customer
  observed that if an AAD value with length=0 is supplied for
  decryption, then the decryption operation would unexpectedly
  succeed.
  

Local fix

Problem summary

• The IBMJCE provider code was failing to reset the AAD value to
  its uninitialized state within the AES/GCM cipher object state
  during init( ) processing and doFinal( ) processing, as dictated
  by the Cipher javadocs.
  The Cipher framework updateAAD( ) method discards any AAD values
  with length=0.  Therefore, the AAD value supplied to the AES/GCM
  cipher object for decryption was being discarded, and the AAD
  value that had been supplied for encryption was retained and was
  reused for decryption.
  

Problem conclusion

• The AES/GCM cipher code of the IBMPKCS11Impl provider has been
  modified to set the AAD value within the cipher object to its
  uninitialized state during init( ) and doFinal( ) processing.
  The GIT issue associated with this change is #1.
  The RTC Problem report associated with this change is 139433.
  The affected IBM JVM's are:  70sr10fp35, 7.1sr4fp35, and
  80sr5fp25
  The affected jar file is ibmjceprovider.jar.
  The build level of the updated IBMJCE70 jar file is:  build-169
  The build level of the updated IBMJCE80 jar file is:  build-170
  .
  This APAR will be fixed in the following Java Releases:
     8    SR5 FP25  (8.0.5.25)
     7    SR10 FP35 (7.0.10.35)
     7 R1 SR4 FP35  (7.1.4.35)
  .
  Contact your IBM Product's Service Team for these Service
  Refreshes and Fix Packs.
  For those running stand-alone, information about the available
  Service Refreshes and Fix Packs can be found at:
             https://www.ibm.com/developerworks/java/jdk/
  

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

  SECURITY

• Fixed component ID

  620700125

Applicable component levels