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# $Id$
import base64, sax_utils, resource_set
class msg_pdu(object):
"""
Base type for all Up-Down PDUs.
"""
def __str__(self):
return ('\
<?xml version="1.0" encoding="UTF-8"?>\n\
<message xmlns="http://www.apnic.net/specs/rescerts/up-down/"\n\
version="1"\n\
sender="%s"\n\
recipient="%s"\n\
type="%s">\n' \
% (self.sender, self.recipient, self.type)
) + self.toXML() + "</message>\n"
def toXML(self):
return ""
def startElement(self, name, attrs):
pass
def endElement(self, name, text):
pass
class cert_elt(object):
"""
Up-Down protocol representation of an issued certificate.
"""
def __init__(self, attrs):
sax_utils.snarf_attribute(self, attrs, "cert_url")
sax_utils.snarf_attribute(self, attrs, "req_resource_set_as", resource_set.resource_set_as)
sax_utils.snarf_attribute(self, attrs, "req_resource_set_ipv4", resource_set.resource_set_ipv4)
sax_utils.snarf_attribute(self, attrs, "req_resource_set_ipv6", resource_set.resource_set_ipv6)
def __str__(self):
xml = (' <certificate cert_url="%s"' % (self.cert_url))
if self.req_resource_set_as:
xml += ('\n req_resource_set_as="%s"' % self.req_resource_set_as)
if self.req_resource_set_ipv4:
xml += ('\n req_resource_set_ipv4="%s"' % self.req_resource_set_ipv4)
if self.req_resource_set_ipv6:
xml += ('\n req_resource_set_ipv6="%s"' % self.req_resource_set_ipv6)
xml += ">" + base64.b64encode(self.cert) + "</certificate>\n"
return xml
class class_elt(object):
"""
Up-Down protocol representation of a resource class.
"""
def __init__(self, attrs):
sax_utils.snarf_attribute(self, attrs, ("class_name", "cert_url", "suggested_sia_head"))
sax_utils.snarf_attribute(self, attrs, "resource_set_as", resource_set.resource_set_as)
sax_utils.snarf_attribute(self, attrs, "resource_set_ipv4", resource_set.resource_set_ipv4)
sax_utils.snarf_attribute(self, attrs, "resource_set_ipv6", resource_set.resource_set_ipv6)
self.certs = []
def __str__(self):
xml = ('\
<class class_name="%s"\n\
cert_url="%s"\n\
resource_set_as="%s"\n\
resource_set_ipv4="%s"\n\
resource_set_ipv6="%s"' \
% (self.class_name, self.cert_url,
self.resource_set_as, self.resource_set_ipv4, self.resource_set_ipv6))
if self.suggested_sia_head:
xml += ('\n suggested_sia_head="%s"' % (self.suggested_sia_head))
xml += ">\n"
for cert in self.certs:
xml += str(cert)
xml += " <issuer>" + base64.b64encode(self.issuer) + "</issuer>\n </class>\n"
return xml
class list_pdu(msg_pdu):
"""
Up-Down protocol "list" PDU.
"""
pass
class list_response_pdu(msg_pdu):
"""
Up-Down protocol "list_response" PDU.
"""
def __init__(self):
self.classes = []
def startElement(self, name, attrs):
if name == "class":
self.classes.append(class_elt(attrs))
elif name == "certificate":
self.classes[-1].certs.append(cert_elt(attrs))
def endElement(self, name, text):
if name == "certificate":
self.classes[-1].certs[-1].cert = base64.b64decode(text)
elif name == "issuer":
self.classes[-1].issuer = base64.b64decode(text)
def toXML(self):
return "".join(map(str, self.classes))
class issue_pdu(msg_pdu):
"""
Up-Down protocol "issue" PDU.
"""
def startElement(self, name, attrs):
assert name == "request"
sax_utils.snarf_attribute(self, attrs, "class_name")
sax_utils.snarf_attribute(self, attrs, "req_resource_set_as", resource_set.resource_set_as)
sax_utils.snarf_attribute(self, attrs, "req_resource_set_ipv4", resource_set.resource_set_ipv4)
sax_utils.snarf_attribute(self, attrs, "req_resource_set_ipv6", resource_set.resource_set_ipv6)
def endElement(self, name, text):
assert name == "request"
self.pkcs10 = base64.b64decode(text)
def toXML(self):
xml = (' <request class_name="%s"' % self.class_name)
if self.req_resource_set_as:
xml += ('\n req_resource_set_as="%s"' % self.req_resource_set_as)
if self.req_resource_set_ipv4:
xml += ('\n req_resource_set_ipv4="%s"' % self.req_resource_set_ipv4)
if self.req_resource_set_ipv6:
xml += ('\n req_resource_set_ipv6="%s"' % self.req_resource_set_ipv6)
return xml + ">" + base64.b64encode(self.pkcs10) + "</request>\n"
class issue_response_pdu(list_response_pdu):
"""
Up-Down protocol "issue_response" PDU.
"""
def toXML(self):
assert len(self.classes) == 1
return list_response_pdu.toXML(self)
class revoke_pdu(msg_pdu):
"""
Up-Down protocol "revoke" PDU.
"""
def startElement(self, name, attrs):
sax_utils.snarf_attribute(self, attrs, ("class_name", "ski"))
def toXML(self):
return (' <key class_name="%s" ski="%s" />\n' % (self.class_name, self.ski))
class revoke_response_pdu(revoke_pdu):
"""
Up-Down protocol "revoke_response" PDU.
"""
pass
class error_response_pdu(msg_pdu):
"""
Up-Down protocol "error_response" PDU.
"""
def toXML(self):
return ' <status>%d</status>\n' % self.status
def endElement(self, name, text):
if name == "status":
self.status = int(text)
elif name == "last_message_processed":
self.last_message_processed = text
elif name == "description":
self.description = text
class sax_handler(sax_utils.handler):
"""
SAX handler for Up-Down protocol. Builds message PDU then
dispatches to that class's handler for nested data.
"""
def startElement(self, name, attrs):
if name == "message":
assert int(attrs.getValue("version")) == 1
self.set_obj({ "list" : list_pdu(),
"list_response" : list_response_pdu(),
"issue" : issue_pdu(),
"issue_response" : issue_response_pdu(),
"revoke" : revoke_pdu(),
"revoke_response" : revoke_response_pdu(),
"error_response" : error_response_pdu()
}[attrs.getValue("type").encode("ascii")])
sax_utils.snarf_attribute(self.obj, attrs, ("sender", "recipient", "type"))
else:
self.obj.startElement(name, attrs)
def endElement(self, name):
if name != "message":
self.obj.endElement(name, self.get_text())
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