Signing Base64-encoded data and SignatureProperties

[Marina Moreno <ma...@hotmail.com>]

Hi all!!

   I am trying to sign (detached) some base64-encoded data along with a 
SignatureProperty (SigningTime). If I base64-decode the data before signing 
and specify C14N transform for the SignatureProperty, everything is OK; 
however, if I do not base64-decode the data but I include Base64-decode 
transformation instead, keeping C14NTransform for SignatureProperty, I get 
the following exception at signing time:

[Fatal Error] :1:1: Content is not allowed in prolog.
org.apache.xml.security.signature.XMLSignatureException: Content is not 
allowed in prolog.
Original Exception was 
org.apache.xml.security.signature.ReferenceNotInitializedException: Content 
is not allowed in prolog.
Original Exception was 
org.apache.xml.security.signature.ReferenceNotInitializedException: Content 
is not allowed in prolog.
Original Exception was 
org.apache.xml.security.signature.XMLSignatureException: Content is not 
allowed in prolog.
Original Exception was 
org.apache.xml.security.transforms.TransformationException: Content is not 
allowed in prolog.
Original Exception was 
org.apache.xml.security.c14n.CanonicalizationException: Content is not 
allowed in prolog.
Original Exception was org.xml.sax.SAXParseException: Content is not allowed 
in prolog.
	at org.apache.xml.security.signature.XMLSignature.sign(Unknown Source)

Could somebody so kind as to tell me what is wrong, please?

Thanks in advance.

Marina.

_________________________________________________________________
Moda para esta temporada. Ponte al día de todas las tendencias. 
http://www.msn.es/Mujer/moda/default.asp