def get_hops_hash(self, hex=False): # pragma: no cover
"""
Returns the hash over all triples (ISD_AS, IG_IF, EG_IF) included in
the path segment.
"""
data = []
for asm in self.iter_asms():
pcbm = asm.pcbm(0)
data.append(asm.isd_as().pack())
data.append(struct.pack("!QQ", pcbm.p.inIF, pcbm.p.outIF))
data = b"".join(data)
if hex:
return crypto_hash(data).hex()
return crypto_hash(data)
def _zk_write_rev(self, data):
hash_ = crypto_hash(data).hex()
try:
self.rev_cache.store("%s-%s" % (hash_, SCIONTime.get_time()), data)
except ZkNoConnection:
logging.warning("Unable to store revocation(s) in shared path: "
"no connection to ZK")
def _share_object(self, pld, is_trc):
"""
Share path segments (via ZK) with other path servers.
"""
pld_packed = pld.pack()
pld_hash = crypto_hash(pld_packed).hex()
try:
if is_trc:
self.trc_cache.store(
"%s-%s" % (pld_hash, SCIONTime.get_time()), pld_packed)
else:
self.cc_cache.store("%s-%s" % (pld_hash, SCIONTime.get_time()),
pld_packed)
except ZkNoConnection:
logging.warning("Unable to store %s in shared path: "
"no connection to ZK" % "TRC" if is_trc else "CC")
return
logging.debug("%s stored in ZK: %s" %
("TRC" if is_trc else "CC", pld_hash))
