code review

src/main/java/com/josh/vku2f/IDSecret.java

@@ -79,6 +79,7 @@ public class IDSecret {
 	}
 
 	public void encryptCx(){
+		// pkcs#7 padding
 		Util.arrayFill(paddedCx, (short)4, (short)12, (byte)0x0c );
 		Util.arrayCopy(Cx, (short)0, paddedCx, (short)0, (short)Cx.length);
 		aesEncrypt.doFinal(paddedCx, (short)0, (short) paddedCx.length, encryptedCx, (short)0);
@@ -98,6 +99,7 @@ public class IDSecret {
 			updateOffset += (byte)32;
 		}
 		sha256.doFinal(scratch, updateOffset, scratchLength, scratch, (short)0);
+		// pkcs#7 padding
 		Util.arrayFill(scratch, (short)32, (short)16, (byte)0x10);
 		aesEncrypt.update(scratch, (short)0, (short)16, outputBuffer, outputOffset);
 		aesEncrypt.update(scratch, (short)16, (short)16 , outputBuffer, (short)(outputOffset+16) );