How to use the signxml.XMLSigner function in signxml
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TadaSoftware / PyNFe / pynfe / processamento / assinatura.py View on Github 
def assinar(self, xml, retorna_string=False):
# busca tag que tem id(reference_uri), logo nao importa se tem namespace
reference = xml.find(".//*[@Id]").attrib['Id']
# retira acentos
xml_str = remover_acentos(etree.tostring(xml, encoding="unicode", pretty_print=False))
xml = etree.fromstring(xml_str)
signer = XMLSigner(
method=signxml.methods.enveloped, signature_algorithm="rsa-sha1",
digest_algorithm='sha1',
c14n_algorithm='http://www.w3.org/TR/2001/REC-xml-c14n-20010315')
ns = {None: signer.namespaces['ds']}
signer.namespaces = ns
ref_uri = ('#%s' % reference) if reference else None
signed_root = signer.sign(
xml, key=self.key, cert=self.cert, reference_uri=ref_uri)
ns = {'ns': NAMESPACE_SIG}
# coloca o certificado na tag X509Data/X509Certificate
tagX509Data = signed_root.find('.//ns:X509Data', namespaces=ns)
etree.SubElement(tagX509Data, 'X509Certificate').text = self.cert
if retorna_string:from signxml import XMLSigner, XMLVerifier
signer = XMLSigner()
verifier = XMLVerifier()
def sign(tree, key, cert, **kwargs):
return signer.sign(tree, key=key, cert=cert, **kwargs)
def verify(tree, **kwargs):
return verifier.verify(tree, **kwargs).signed_xml is not None
