def Payload_Challenge_Response(ID, RAND, ETYPE):
# Let's build EAP-Payload Challenge-Response AVP
# Create EAP-Payload (empty)
EAP = eap.EAPItem()
# Set command code
EAP.cmd = eap.EAP_CODE_RESPONSE
# Set id
EAP.id = ID
# Set type
EAP.type = ETYPE
# Set sub-type
EAP.stype = eap.dictEAPSUBname2type("SIM-Challenge")
# RAND is copied from Challenge
# These values can be calculated or entered manually
# Copied from SIP-Auth-Data-Item->Authentication-Information-SIM(301)
a1 = "8b7e0f1147f9af050809bbaf50881dbb08014ca81b36d9fa"
# Copied from SIP-Auth-Data-Item->Authorization-Information-SIM(302)
b1 = "334131fc"
RAND, KC = prepareKeysFromTriplets(a1, a1, a1)
SRES = b1 + b1 + b1
# Step 2
KENCR, KAUT, MSK, EMSK, MK = eap.sim_calc_keys(IDENTITY, KC, NONCE_MT,
VERSION_LIST, "1")
# Add AT_MAC as last
eap.addMAC(EAP, KAUT, SRES)
# Do not add any AVPs after adding MAC
Payload = eap.encode_EAP(EAP)
# Payload now contains EAP-Payload AVP
return Payload
def Payload_Challenge_Response(ID,RAND,ETYPE):
# Let's build EAP-Payload Challenge-Response AVP
# Create EAP-Payload (empty)
EAP=eap.EAPItem()
# Set command code
EAP.cmd=eap.EAP_CODE_RESPONSE
# Set id
EAP.id=ID
# Set type
EAP.type=ETYPE
# Set sub-type
EAP.stype=eap.dictEAPSUBname2type("SIM-Challenge")
# RAND is copied from Challenge
# These values can be calculated or entered manually
# Copied from SIP-Auth-Data-Item->Authentication-Information-SIM(301)
a1="8b7e0f1147f9af050809bbaf50881dbb08014ca81b36d9fa"
# Copied from SIP-Auth-Data-Item->Authorization-Information-SIM(302)
b1="334131fc"
RAND,KC=prepareKeysFromTriplets(a1,a1,a1)
SRES=b1+b1+b1
# Step 2
KENCR,KAUT,MSK,EMSK,MK=eap.sim_calc_keys(IDENTITY,KC,NONCE_MT,VERSION_LIST, "1")
# Add AT_MAC as last
eap.addMAC(EAP,KAUT, SRES)
# Do not add any AVPs after adding MAC
Payload=eap.encode_EAP(EAP)
# Payload now contains EAP-Payload AVP
return Payload
"hex")
a3 = "323534333064306365383134306564656238386464653763303135326432343235386261656331386330386331633030".decode(
"hex")
# Copied from SIP-Auth-Data-Item->Authorization-Information-SIM(302)
b1 = "6639333733396536"
b2 = "3937356635386534"
b3 = "3737343362623433"
SRES = b1 + b2 + b3
RAND, KC = prepareKeysFromTriplets(a1, a2, a3)
print RAND, SRES, KC
print "RAND=", RAND.encode("hex")
print "KC=", KC.encode("hex")
print "=" * 30
# Step 2
KENCR, KAUT, MSK, EMSK, MK = eap.sim_calc_keys(Identity, KC.encode("hex"),
NONCE_MT, VERSION_LIST,
SELECTED_VER)
# KAUT is used to sign AT_MAC
# Step 3 (optional)
DATA = eap.decrypt_data(IV, KENCR, ENCR_DATA)
print DATA
print "-" * 30
avps = eap.splitEAPAVPs(DATA)
for avp in avps:
(Name, Value) = avp
print Name, "=", Value
REAUTH = findAVP("AT_NEXT_REAUTH_ID", avps)
if REAUTH <> ERROR:
print REAUTH.decode("hex")
print "=" * 30
# Copied from SIP-Auth-Data-Item->Authentication-Information-SIM(301)
a1="343766636361653132353364383564326662383664393337636266653631313532373163633231646232643365303030".decode("hex")
a2="663065366339636161643166353733613832616137356665363066343666353965346331396335393936316161633030".decode("hex")
a3="323534333064306365383134306564656238386464653763303135326432343235386261656331386330386331633030".decode("hex")
# Copied from SIP-Auth-Data-Item->Authorization-Information-SIM(302)
b1="6639333733396536"
b2="3937356635386534"
b3="3737343362623433"
SRES=b1+b2+b3
RAND,KC=prepareKeysFromTriplets(a1,a2,a3)
print RAND,SRES,KC
print "RAND=",RAND.encode("hex")
print "KC=",KC.encode("hex")
print "="*30
# Step 2
KENCR,KAUT,MSK,EMSK,MK=eap.sim_calc_keys(Identity,KC.encode("hex"),NONCE_MT,VERSION_LIST,SELECTED_VER)
# KAUT is used to sign AT_MAC
# Step 3 (optional)
DATA=eap.decrypt_data(IV,KENCR,ENCR_DATA)
print DATA
print "-"*30
avps=eap.splitEAPAVPs(DATA)
for avp in avps:
(Name,Value)=avp
print Name,"=",Value
REAUTH=findAVP("AT_NEXT_REAUTH_ID",avps)
if REAUTH<>ERROR:
print REAUTH.decode("hex")
print "="*30
######################################################
