def make_2g_vector(self, IMSI, RAND=None):
"""
return a 2G authentication vector "triplet":
RAND [16 bytes], RES [4 bytes], Kc [8 bytes]
or None if the IMSI is not defined in the db or ALG is invalid
RAND can be passed as argument
"""
# lookup db for authentication Key and algorithm id for IMSI
try:
K_ALG_SQN_OP = self.db[IMSI]
except KeyError:
self._log('WNG', '[make_2g_vector] IMSI %s not present in AuC.db' % IMSI)
return None
if len(K_ALG_SQN_OP) == 4:
K, ALG, SQN, OP = K_ALG_SQN_OP
else:
K, ALG, SQN = K_ALG_SQN_OP
OP = None
#
if not RAND:
RAND = genrand(16)
#
if ALG == 0:
# Milenage, adapted to 2G
if OP is not None:
XRES, CK, IK, AK = self.Milenage.f2345(RAND, K, OP)
else:
XRES, CK, IK, AK = self.Milenage.f2345(RAND, K)
RES, Kc = conv_102_C2(XRES), conv_102_C3(CK, IK)
elif ALG == 4:
# TUAK, adapted to 2G
if OP is not None:
# which is actually TOP, for TUAK
XRES, CK, IK, AK = self.TUAK.f2345(RAND, K, OP)
else:
XRES, CK, IK, AK = self.TUAK.f2345(RAND, K)
RES, Kc = conv_102_C2(XRES), conv_102_C3(CK, IK)
else:
# COMP128
if ALG == 1:
RES, Kc = comp128v1(K, RAND)
elif ALG == 2:
RES, Kc = comp128v2(K, RAND)
elif ALG == 3:
RES, Kc = comp128v3(K, RAND)
else:
# invalid ALG
return None
#
# return auth vector
self._log('DBG', '[make_2g_vector] IMSI %s: RAND %s, RES %s, Kc %s'\
% (IMSI, hexlify(RAND).decode('ascii'), hexlify(RES).decode('ascii'),
hexlify(Kc).decode('ascii')))
return RAND, RES, Kc
def make_2g_vector(self, IMSI, RAND=None):
"""
return a 2G authentication vector "triplet":
RAND [16 bytes], RES [4 bytes], Kc [8 bytes]
or None if the IMSI is not defined in the db or ALG2 is invalid
RAND can be passed as argument
"""
# lookup db for authentication Key and algorithm id for IMSI
try:
K, ALG2, SQN, OP = self.db[IMSI]
except KeyError:
self._log('WNG',
'[make_2g_vector] IMSI %s not present in AuC.db' % IMSI)
return None
#
if not RAND:
RAND = genrand(16)
#
if ALG2 == 0:
if OP is not None:
XRES, CK, IK, AK = self.Milenage.f2345(RAND, K, OP)
else:
XRES, CK, IK, AK = self.Milenage.f2345(RAND, K)
RES, Ck = conv_C2(XRES), conv_C3(CK, IK)
else:
if ALG2 == 1:
RES, Ck = comp128v1(K, RAND)
elif ALG2 == 2:
RES, Ck = comp128v2(K, RAND)
elif ALG2 == 3:
RES, Ck = comp128v3(K, RAND)
else:
return None
#
# return auth vector
self._log('DBG', '[make_2g_vector] IMSI %s: RAND %s, RES %s, Kc %s'\
% (IMSI, hexlify(RAND).decode('ascii'), hexlify(RES).decode('ascii'),
hexlify(Kc).decode('ascii')))
return RAND, RES, Kc