IJ09107: IBMPKCS11IMPL CRYPTO PROVIDER - INTERMITTENT ERROR WITH SECP521R1 SIGNATURE ON Z/OS

APAR status

• Closed as program error.

Error description

• Error Message: An intermittent exception is seen by the
  IBMPKCS11Impl provider on the z/OS platform when attempting to
  verify an ECDSA signature based upon the secp521r1 curve.  The
  exception is:
  com.ibm.pkcs11.PKCS11Exception: Signature length is out of range
          at com.ibm.pkcs11.nat.NativePKCS11Session.verify(Native
  Method)
          at
  com.ibm.crypto.pkcs11impl.provider.Session.verify(Session.java:5
  30)
          at
  com.ibm.crypto.pkcs11impl.provider.Signature.engineVerify(Signat
  ure.java:532)
          at
  com.ibm.crypto.pkcs11impl.provider.GeneralSignature.engineVerify
  (GeneralSignature.java:523)
          at
  java.security.Signature$Delegate.engineVerify(Signature.java:123
  0)
          at java.security.Signature.verify(Signature.java:661)
          at ecdsa.testDataECDSA213(ecdsa.java:79)
          at ecdsa.main(ecdsa.java:38)
  This error was introduced by an Oracle Security Bulletin which
  updated the Signature.asn1ToECDSA() method.  The new method
  trims leading zeroes from the "r" and "s" values of an ECDSA
  signature prior to signature verification by the hardware.
  However, the error appears to be related to the length of the
  data buffer allocated to hold the trimmed signature.
  No exceptions have been seen by the IBMPKCS11Impl provider when
  using either SafeNet or Thales HSMs.
  .
  Stack Trace: com.ibm.pkcs11.PKCS11Exception: Signature length is
  out of range
          at com.ibm.pkcs11.nat.NativePKCS11Session.verify(Native
  Method)
          at
  com.ibm.crypto.pkcs11impl.provider.Session.verify(Session.java:5
  30)
          at
  com.ibm.crypto.pkcs11impl.provider.Signature.engineVerify(Signat
  ure.java:532)
          at
  com.ibm.crypto.pkcs11impl.provider.GeneralSignature.engineVerify
  (GeneralSignature.java:523)
          at
  java.security.Signature$Delegate.engineVerify(Signature.java:123
  0)
          at java.security.Signature.verify(Signature.java:661)
          at ecdsa.testDataECDSA213(ecdsa.java:79)
          at ecdsa.main(ecdsa.java:38)
  .
  

Local fix

Problem summary

• An intermittent exception is seen by the IBMPKCS11Impl provider
  on the z/OS platform when attempting to verify an ECDSA
  signature based upon the secp521r1 curve.  The exception is:
  com.ibm.pkcs11.PKCS11Exception: Signature length is out of range
          at com.ibm.pkcs11.nat.NativePKCS11Session.verify(Native
  Method)
          at
  com.ibm.crypto.pkcs11impl.provider.Session.verify(Session.java:5
  30)
          at
  com.ibm.crypto.pkcs11impl.provider.Signature.engineVerify(Signat
  ure.java:532)
          at
  com.ibm.crypto.pkcs11impl.provider.GeneralSignature.engineVerify
  (GeneralSignature.java:523)
          at
  java.security.Signature$Delegate.engineVerify(Signature.java:123
  0)
          at java.security.Signature.verify(Signature.java:661)
          at ecdsa.testDataECDSA213(ecdsa.java:79)
          at ecdsa.main(ecdsa.java:38)
  This error was introduced by an Oracle Security Bulletin which
  updated the Signature.asn1ToECDSA() method.  The new method
  trims leading zeroes from the "r" and "s" values of an ECDSA
  signature prior to signature verification by the hardware.
  However, the error appears to be related to the length of the
  data buffer allocated to hold the trimmed signature.
  No exceptions have been seen by the IBMPKCS11Impl provider when
  using either SafeNet or Thales HSMs.
  

Problem conclusion

• A fix has been applied to the Signature.asn1toECDSA( ) method
  for the z/OS platform only.
  .
  This APAR will be fixed in the following Java Releases:
     8    SR5 FP25  (8.0.5.25)
     7 R1 SR4 FP35  (7.1.4.35)
     7    SR10 FP35 (7.0.10.35)
  .
  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