def process_letter(l):
sender = alias.get_cert(l.attributes['SENDER'],l.attributes['VIA'],False)
receiver_pub = alias.get_cert(l.attributes['RECEIVER'],l.attributes['VIA'],False)
receiver_prv = None
if sender == False or receiver_pub == False:
raise Exception("Cannot find sender or/and receiver's certificate.")
outputbuffer = []
jsons = splitjsons(l.body.strip())
k = keys.keys()
for j in jsons:
try:
jp = json.loads(j)
except Exception,e:
print 'Error decoding json: %s' % e
continue
try:
if jp['Title'] == 'Intermediate_Key':
if receiver_prv == None:
receiver_prv = alias.get_cert(l.attributes['RECEIVER'],l.attributes['VIA'],True)
if receiver_prv == False:
raise Exception("Cannot find receiver's private certificate.")
k.load(jp,sender,receiver_prv)
elif jp['Title'] == 'Message':
outputbuffer.append(packager.depackage(k.decrypt(jp)))
except Exception,e:
raise Exception("%s" % e)
def process_letter(l):
sender_pub = alias.get_cert(l.attributes['SENDER'],l.attributes['VIA'],False)
receiver = alias.get_cert(l.attributes['RECEIVER'],l.attributes['VIA'],False)
if sender_pub == False or receiver == False:
raise Exception("Cannot find sender[%s] or/and receiver[%s]'s certificate." % (l.attributes['SENDER'],l.attributes['RECEIVER']))
outputbuffer = []
k = keys.keys()
do_gen = False
if not k.find_key(sender_pub,receiver):
do_gen = True
elif k.deprecated:
do_gen = True
if do_gen:
sender_prv = alias.get_cert(l.attributes['SENDER'],l.attributes['VIA'],True)
if sender_prv == False:
raise Exception("Cannot find sender's private certificate.")
newkeystr = k.new(sender_prv,receiver,432000,False)
outputbuffer.append(newkeystr)
elif k.activated == False and k.deprecated == False and k.exchange_info != '': # Try Key Exchange
outputbuffer.append(json.dumps(k.exchange_info))
trans = k.encrypt(packager.package(l.body),False)
outputbuffer.append(trans)
return outputbuffer
