IJ46474: JSSE NPE IN KRB5CLIENTKEYEXCHANGEPRODUCER.PRODUCE()

APAR status

• Closed as program error.

Error description

• Error Message: N/A
  .
  Stack Trace: Java callstack:
    java.lang.NullPointerException
    at
  com.ibm.jsse2.Krb5ClientKeyExchange$Krb5ClientKeyExchangeProduce
  r.produce(Krb5ClientKeyExchange.java:103)
    at
  com.ibm.jsse2.ClientKeyExchange$ClientKeyExchangeProducer.produc
  e(ClientKeyExchange.java:60)
    at com.ibm.jsse2.SSLHandshake.produce(SSLHandshake.java:415)
    at
  com.ibm.jsse2.ServerHelloDone$ServerHelloDoneConsumer.consume(Se
  rverHelloDone.java:177)
    at com.ibm.jsse2.SSLHandshake.consume(SSLHandshake.java:371)
    at
  com.ibm.jsse2.HandshakeContext.dispatch(HandshakeContext.java:67
  2)
    at
  com.ibm.jsse2.HandshakeContext.dispatch(HandshakeContext.java:65
  0)
    at
  com.ibm.jsse2.TransportContext.dispatch(TransportContext.java:19
  5)
    at com.ibm.jsse2.SSLTransport.decode(SSLTransport.java:149)
    at com.ibm.jsse2.SSLSocketImpl.decode(SSLSocketImpl.java:1319)
    at
  com.ibm.jsse2.SSLSocketImpl.readHandshakeRecord(SSLSocketImpl.ja
  va:1229)
    at
  com.ibm.jsse2.SSLSocketImpl.startHandshake(SSLSocketImpl.java:41
  3)
    at
  com.ibm.jsse2.SSLSocketImpl.ensureNegotiated(SSLSocketImpl.java:
  833)
    at
  com.ibm.jsse2.SSLSocketImpl.access$200(SSLSocketImpl.java:72)
    at
  com.ibm.jsse2.SSLSocketImpl$AppOutputStream.write(SSLSocketImpl.
  java:1134)
  .
  

Local fix

• N/A
  

Problem summary

• Krb5ClientKeyExchangeProducer.produce() makes a direct reference
  to the ClientHandshakeContext.requestedServerNames field, which
  can be null.
  The code should be modified to use the
  HandshakeContext.getRequestedServerNames() getter method which
  returns an empty list, instead of null.
  

Problem conclusion

• Modified Krb5ClientKeyExchangeProducer.produce() to use the
  HandshakeContext.getRequestedServerNames() getter method which
  returns an empty list,
  instead of null, avoiding the NPE.
  The files affected by this APAR are: ibmjsseprovider2.jar (Java
  8: Non-FIPS: build_20230330--649, FIPS140-3:
  build_20230330--650).
  The associated Hursley RTC Problem Report is: PR149056.
  The associated Austin Git issue is: Issue #257 for JSSE.
  The associated Austin APAR issue is: N/A.
  .
  This APAR will be fixed in the following Releases:
  .
  IBM SDK, Java Technology Edition
     8    SR8 FP10  (8.0.8.10)
  .
  Contact your IBM Product's Service Team for these Service
  Refreshes and Fix Packs.
  For those running stand-alone, information about the available
  maintenance can be found at:
             https://www.ibm.com/support/pages/java-sdk
  

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