def decrypt_element(encrypted_data, key, debug=False, inplace=False):
"""
Decrypts an encrypted element.
:param encrypted_data: The encrypted data.
:type: lxml.etree.Element | DOMElement | basestring
:param key: The key.
:type: string
:param debug: Activate the xmlsec debug
:type: bool
:param inplace: update passed data with decrypted result
:type: bool
:returns: The decrypted element.
:rtype: lxml.etree.Element
"""
if isinstance(encrypted_data, Element):
encrypted_data = fromstring(str(encrypted_data.toxml()))
if not inplace and isinstance(encrypted_data,
OneLogin_Saml2_XML._element_class):
encrypted_data = deepcopy(encrypted_data)
elif isinstance(encrypted_data, OneLogin_Saml2_XML._text_class):
encrypted_data = OneLogin_Saml2_XML._parse_etree(encrypted_data)
xmlsec.enable_debug_trace(debug)
manager = xmlsec.KeysManager()
manager.add_key(xmlsec.Key.from_memory(key, xmlsec.KeyFormat.PEM,
None))
enc_ctx = xmlsec.EncryptionContext(manager)
return enc_ctx.decrypt(encrypted_data)
