[xmlsec] failed:expr=xpointer(id('1234'))

[Aleksey Sanin]

1) I am not sure what "<Reference Id="#1234">" means. In this case URI is ""
i.e. the whole document is selected. IMHO, it *could not* work if there 
is no
transforms for this Reference (i.e. your signature could not be validated).
2) In order to use "<Reference URI="#1234">" you need to have a DTD or 
schema.
For explanations and workarounds see section 3.2 from FAQ:
     http://www.aleksey.com/xmlsec/faq.html
3) "1234" is *not* a valid ID attribute. Please, read XML spec or search 
xmlsec
mailing list archive, it was discussed a couple times at least.

Aleksey