def data_unsigned_decrypted(self,data, keyPublic,keyPrivate):
#####################################################################################
#INPUT
#-object serialized and crypted under keYPublic
#-public key
#-private key
#FUNCTION
#-decryption under keyPublic
#-signature verification
#-unserialization data
#-decryption under private key
#OUTPUT
#D_privateKey((serialized)((serialized)data,signature_privateKey((serialized)data)))
#if some problem appens it returns false
#####################################################################################
logging.debug("Inside data_unsigned_decrypted")
logging.debug("Try to decrypt data")
pkt_un=crypto.decrypt(keyPrivate, data)
logging.debug("Try to unserialize data and sig")
#print pkt_un
t = pickle.loads(pkt_un)
(data_p,signature) = t
logging.debug("Try to verify sig")
if not (crypto.verify_sign(keyPublic,data_p, signature)):
logging.error("Signature not verified")# check this!!!!!
return False#check this!!!!
logging.debug("Try to unserialize data")
data=pickle.loads(data_p)
logging.debug("Return data")
return data
def checkCertificate(cert,keyPublic=crypto.loadPublicKey("TIS")):
if cert.__len__()!=3:
logging.error("Invalid certificate, (Data,PublicKey,Signature)")
return False
if not (crypto.verify_sign(keyPublic,(cert[0]+cert[1]),cert[2])):
logging.error("Signature into certificate not verified")# check this!!!!!
return False#check this!!!!
return True