protected XMLSignatureInput enginePerformTransform(
XMLSignatureInput input, OutputStream os, Transform transform
) throws CanonicalizationException {
Canonicalizer11_WithComments c14n = new Canonicalizer11_WithComments();
if (os != null) {
c14n.setWriter(os);
}
byte[] result = null;
result = c14n.engineCanonicalize(input);
XMLSignatureInput output = new XMLSignatureInput(result);
if (os != null) {
output.setOutputStream(os);
}
return output;