java.security -> Signature.verify() throwing ArrayIndexOutofBoundsException

["Venkatesan Krishnamoorthy" <venkatesan_k () infosys com>]

Dear All:
I am getting a java.lang.ArrayIndexOutOfBoundsException  when I attempt to verify a digital signature, i.e when I 
invoke the Signature.verify() method of java.security.* package. This is the stack trace;
java.lang.ArrayIndexOutOfBoundsException
        at sun.security.util.DerInputStream.init(DerInputStream.java:87)
        at sun.security.util.DerInputStream.(DerInputStream.java:64)
        at sun.security.provider.DSA.engineVerify(DSA.java:195)
        at java.security.Signature.verify(Signature.java:418)

Could any of you please tell me how I can fix it? Thanks.
Venkat