def analyseEchoes(self, echoes, value, timestamp):
validEchoes = []
for (server_id, data_signature) in echoes:
if Signature.verifySign(Signature.getPublicKey(server_id, -1, self.CERT_PATH), data_signature, value + str(timestamp)):
validEchoes.append((server_id, data_signature))
return validEchoes
def analyseResponse(self, responses):
array = []
for (rValue, rTimestamp, data_sign, server_id, server) in responses:
if rTimestamp == -1:
#nao ha dado escrito no servidor
self.OUT_DATED_SERVERS.append(server)
else:
if Signature.verifySign(Signature.getPublicKey(server_id, -1, self.CERT_PATH), data_sign, rValue + str(rTimestamp)):
self.addResponseToArrayWithRepeatTimes(array, rValue, rTimestamp, data_sign, server_id, server)
else:
# assinatura invalida
self.OUT_DATED_SERVERS.append(server)
return self.getValidResponse(array)
def isEchoValid(self, echoes, value, timestamp, type):
validEchoes = 0
for (server_id, data_signature) in echoes:
try:
if Signature.verifySign(
Signature.getPublicKey(server_id, -1, self.CERT_PATH),
data_signature, value + str(timestamp)):
validEchoes = validEchoes + 1
except Exception as msg:
if self.VERBOSE > 0:
print('Error on isEchoValid, ' + 'Error code: ' +
str(msg[0]) + ', Error message: ' + str(msg[1]))
if type == Define.write:
return validEchoes >= self.QUORUM
else: #write_back
return validEchoes >= self.FAULTS + 1
def analyseResponse(self, responses):
value = ''
timestamp = -1
repeatTimes = 0
auxServers = []
data_signature = ''
client_id = -1
for (rValue, rTimestamp, data_sign, r_client_id, server) in responses:
if rTimestamp == -1 or r_client_id == -1:
#nao ha dado escrito no servidor
self.OUT_DATED_SERVERS.append(server)
else:
if Signature.verifySign(
Signature.getPublicKey(-1, r_client_id,
self.CERT_PATH), data_sign,
rValue + str(rTimestamp)):
if (rTimestamp == timestamp):
repeatTimes = repeatTimes + 1
auxServers.append(server)
elif (rTimestamp > timestamp):
timestamp = rTimestamp
repeatTimes = 1
value = rValue
data_signature = data_sign
client_id = r_client_id
self.transferObjects(auxServers,
self.OUT_DATED_SERVERS)
auxServers.append(server)
else:
self.OUT_DATED_SERVERS.append(server)
else:
# assinatura invalida
self.OUT_DATED_SERVERS.append(server)
return (value, timestamp, data_signature, client_id)