ECPoint

Good Evening Gentlemen,

I am trying to use java ECPoint of org.bouncycastle.ec.math package. I generate random number and create ECPoing ( public coordinates) as follows.  I am using P-256 curve. My expectation is AffineXcoordiante or AffineYCoord will be 32 bytes.
However I some time get 32 other time it gives 33. am I missing something?

Your answer will be appreciated.

Thank you.
Regards,
rn


ECPoint g = x9.getG()
ECPoint pointQ = g.multiply(privateKey); 
pointQ=pointQ.normalize();
byte[] datax1=pointQ.getAffineXCoord().toBigInteger().toByteArray();
byte[] datay1=pointQ.getAffineYCoord().toBigInteger().toByteArray();
System.out.println(“Len X=“+ datax1.length+”  Y=“+datay1.length)