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swu_emulator.py
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import serial
import struct
import socket
import random
import time
import select
import sys
import os
import fcntl
import subprocess
import multiprocessing
import requests
from optparse import OptionParser
from binascii import hexlify, unhexlify
from cryptography.hazmat.backends import default_backend
from cryptography.hazmat.primitives.asymmetric import dh
from cryptography.hazmat.primitives import hashes, hmac
from cryptography.hazmat.primitives.ciphers import Cipher, algorithms, modes
from Crypto.Cipher import AES
from cryptography.hazmat.primitives.ciphers.aead import AESGCM
from smartcard.System import readers
from smartcard.util import toHexString,toBytes
from CryptoMobile.Milenage import Milenage
from card.USIM import *
requests.packages.urllib3.disable_warnings()
'''
Ike Process
IPsec_encoder (receives data from tunnel interface -> encrypts and sends it towards the server/epdg)
IPsec_decoder (receives encrypted data from server/epdg -> decypts it and sends it to the tunnel interface)
'''
INTER_PROCESS_CREATE_SA = 1
INTER_PROCESS_UPDATE_SA = 2
INTER_PROCESS_DELETE_SA = 3
INTER_PROCESS_IKE = 4
INTER_PROCESS_IE_ENCR_ALG = 1
INTER_PROCESS_IE_INTEG_ALG = 2
INTER_PROCESS_IE_ENCR_KEY = 3
INTER_PROCESS_IE_INTEG_KEY = 4
INTER_PROCESS_IE_SPI_INIT = 5
INTER_PROCESS_IE_SPI_RESP = 6
INTER_PROCESS_IE_IKE_MESSAGE = 7
#DEFAULTs
DEFAULT_IKE_PORT = 500
DEFAULT_IKE_NAT_TRAVERSAL_PORT = 4500
DEFAULT_SERVER = '1.2.3.4'
DEFAULT_COM = '/dev/ttyUSB2'
DEFAULT_IMSI = '123456012345678'
DEFAULT_MCC = '123'
DEFAULT_MNC = '456'
DEFAULT_APN = 'internet'
DEFAULT_TIMEOUT_UDP = 2
#DEFAULT_TIMEOUT_UDP_NAT_TRANSVERSAL = 2
DEFAULT_CK = '0123456789ABCDEF0123456789ABCDEF'
DEFAULT_IK = '0123456789ABCDEF0123456789ABCDEF'
DEFAULT_RES = '0123456789ABCDEF'
NONE = 0
#IKEv2 Payload Types
SA = 33
KE = 34
IDI = 35
IDR = 36
CERT = 37
CERTREQ = 38
AUTH = 39
NINR = 40
N = 41
D = 42
V = 43
TSI = 44
TSR = 45
SK = 46
CP = 47
EAP = 48
#IKEv2 Exchange Types
IKE_SA_INIT = 34
IKE_AUTH = 35
CREATE_CHILD_SA = 36
INFORMATIONAL = 37
RESERVED = 0
IKE = 1
AH = 2
ESP = 3
#Transform Type Values
ENCR = 1
PRF = 2
INTEG = 3
D_H = 4
ESN = 5
#Transform Type 1 - Encryption Algorithm Transform IDs
ENCR_DES_IV64 = 1
ENCR_DES= 2
ENCR_3DES = 3
ENCR_RC5 = 4
ENCR_IDEA = 5
ENCR_CAST = 6
ENCR_BLOWFISH = 7
ENCR_3IDEA = 8
ENCR_DES_IV32 = 9
ENCR_NULL = 11 #Not allowed
ENCR_AES_CBC = 12
ENCR_AES_CTR = 13
ENCR_AES_CCM_8 = 14
ENCR_AES_CCM_12 = 15
ENCR_AES_CCM_16 = 16
ENCR_AES_GCM_8 = 18
ENCR_AES_GCM_12 = 19
ENCR_AES_GCM_16 = 20
#Transform Type 2 - Pseudorandom Function Transform IDs
PRF_HMAC_MD5 = 1
PRF_HMAC_SHA1 = 2
PRF_HMAC_TIGER = 3
PRF_AES128_XCBC = 4
PRF_HMAC_SHA2_256 = 5
PRF_HMAC_SHA2_384 = 6
PRF_HMAC_SHA2_512 = 7
PRF_AES128_CMAC = 8
#Transform Type 3 - Integrity Algorithm Transform IDs
NONE = 0
AUTH_HMAC_MD5_96 = 1
AUTH_HMAC_SHA1_96 = 2
AUTH_DES_MAC = 3
AUTH_KPDK_MD5 = 4
AUTH_AES_XCBC_96 = 5
AUTH_HMAC_MD5_128 = 6
AUTH_HMAC_SHA1_160 = 7
AUTH_AES_CMAC_96 = 8
AUTH_AES_128_GMAC = 9
AUTH_AES_192_GMAC = 10
AUTH_AES_256_GMAC = 11
AUTH_HMAC_SHA2_256_128 = 12
AUTH_HMAC_SHA2_384_192 = 13
AUTH_HMAC_SHA2_512_256 = 14
#Transform Type 4 - Diffie-Hellman Group Transform IDs
MODP_768_bit = 1
MODP_1024_bit = 2
MODP_1536_bit = 5
MODP_2048_bit = 14
MODP_3072_bit = 15
MODP_4096_bit = 16
MODP_6144_bit = 17
MODP_8192_bit = 18
ESN_NO_ESN = 0
ESN_ESN = 1
TLV = 0
TV = 1
#IKEv2 Transform Attribute Types
KEY_LENGTH = (14, TV)
#states
OK = 0
TIMEOUT = 1
REPEAT_STATE = 2
DECODING_ERROR = 3
MANDATORY_INFORMATION_MISSING = 4
OTHER_ERROR = 5
REPEAT_STATE_COOKIE = 6
#IKEv2 Notify Message Types - Error Types
UNSUPPORTED_CRITICAL_PAYLOAD = 1
INVALID_IKE_SPI = 4
INVALID_MAJOR_VERSION = 5
INVALID_SYNTAX = 7
INVALID_MESSAGE_ID = 9
INVALID_SPI = 11
NO_PROPOSAL_CHOSEN = 14
INVALID_KE_PAYLOAD = 17
AUTHENTICATION_FAILED = 24
SINGLE_PAIR_REQUIRED = 34
NO_ADDITIONAL_SAS = 35
INTERNAL_ADDRESS_FAILURE = 36
FAILED_CP_REQUIRED = 37
TS_UNACCEPTABLE = 38
INVALID_SELECTORS = 39
TEMPORARY_FAILURE = 43
CHILD_SA_NOT_FOUND = 44
# from 24.302
PDN_CONNECTION_REJECTION = 8192
MAX_CONNECTION_REACHED = 8193
SEMANTIC_ERROR_IN_THE_TFT_OPERATION = 8241
SYNTACTICAL_ERROR_IN_THE_TFT_OPERATION = 8242
SEMANTIC_ERRORS_IN_PACKET_FILTERS = 8244
SYNTACTICAL_ERRORS_IN_PACKET_FILTERS = 8245
NON_3GPP_ACCESS_TO_EPC_NOT_ALLOWED = 9000
USER_UNKNOWN = 9001
NO_APN_SUBSCRIPTION = 9002
AUTHORIZATION_REJECTED = 9003
ILLEGAL_ME = 9006
NETWORK_FAILURE = 10500
RAT_TYPE_NOT_ALLOWED = 11001
IMEI_NOT_ACCEPTED = 11005
PLMN_NOT_ALLOWED = 11011
UNAUTHENTICATED_EMERGENCY_NOT_SUPPORTED = 11055
#IKEv2 Notify Message Types - Status Types
INITIAL_CONTACT = 16384
SET_WINDOW_SIZE = 16385
ADDITIONAL_TS_POSSIBLE = 16386
IPCOMP_SUPPORTED = 16387
NAT_DETECTION_SOURCE_IP = 16388
NAT_DETECTION_DESTINATION_IP = 16389
COOKIE = 16390
USE_TRANSPORT_MODE = 16391
HTTP_CERT_LOOKUP_SUPPORTED = 16392
REKEY_SA = 16393
ESP_TFC_PADDING_NOT_SUPPORTED = 16394
NON_FIRST_FRAGMENTS_ALSO = 16395
EAP_ONLY_AUTHENTICATION = 16417
# from 24.302
REACTIVATION_REQUESTED_CAUSE = 40961
BACKOFF_TIMER = 41041
PDN_TYPE_IPv4_ONLY_ALLOWED = 41050
PDN_TYPE_IPv6_ONLY_ALLOWED = 41051
DEVICE_IDENTITY = 41101
EMERGENCY_SUPPORT = 41112
EMERGENCY_CALL_NUMBERS = 41134
NBIFOM_GENERIC_CONTAINER = 41288
P_CSCF_RESELECTION_SUPPORT = 41304
PTI = 41501
IKEV2_MULTIPLE_BEARER_PDN_CONNECTIVITY = 42011
EPS_QOS = 42014
EXTENDED_EPS_QOS = 42015
TFT = 42017
MODIFIED_BEARER = 42020
APN_AMBR = 42094
EXTENDED_APN_AMBR = 42095
N1_MODE_CAPABILITY = 51015
#IKEv2 Authenticaton Method
RSA_DIGITAL_SIGNATURE = 1
SHARED_KEY_MESSAGE_INTEGRITY_CODE = 2
DSS_DIGITAL_SIGNATURE = 3
#IKEv2 Traffic Selector Types
TS_IPV4_ADDR_RANGE = 7
TS_IPV6_ADDR_RANGE = 8
#IP protocol_id
ANY = 0
TCP = 6
UDP = 17
ICMP = 1
ESP_PROTOCOL = 50
NAT_TRAVERSAL = 4500
#IKEv2 Configuration Payload CFG Types
CFG_REQUEST = 1
CFG_REPLY = 2
CFG_SET = 3
CFG_ACK = 4
# IKEv2 Configuration Payload Attribute Types (num, length) None = more
INTERNAL_IP4_ADDRESS = 1
INTERNAL_IP4_NETMASK = 2
INTERNAL_IP4_DNS = 3
INTERNAL_IP4_NBNS = 4
INTERNAL_IP4_DHCP = 6
APPLICATION_VERSION = 7
INTERNAL_IP6_ADDRESS = 8
INTERNAL_IP6_DNS = 10
INTERNAL_IP6_DHCP = 12
INTERNAL_IP4_SUBNET = 13
SUPPORTED_ATTRIBUTES = 14
INTERNAL_IP6_SUBNET = 15
MIP6_HOME_PREFIX = 16
INTERNAL_IP6_LINK = 17
INTERNAL_IP6_PREFIX = 18
HOME_AGENT_ADDRESS = 19
P_CSCF_IP4_ADDRESS = 20
P_CSCF_IP6_ADDRESS = 21
FTT_KAT = 22
EXTERNAL_SOURCE_IP4_NAT_INFO = 23
TIMEOUT_PERIOD_FOR_LIVENESS_CHECK = 24
INTERNAL_DNS_DOMAIN = 25
INTERNAL_DNSSEC_TA = 26
#IKEv2 Identification Payload ID Types
ID_IPV4_ADDR = 1
ID_FQDN = 2
ID_RFC822_ADDR = 3
ID_IPV6_ADDR = 5
ID_DER_ASN1_DN = 9
ID_DER_ASN1_GN = 10
ID_KEY_ID = 11
ID_FC_NAME = 12
ID_NULL = 13
#EAP COde type
EAP_REQUEST = 1
EAP_RESPONSE = 2
EAP_SUCCESS = 3
EAP_FAILURE = 4
#IANA EAP Type
EAP_AKA = 23
#EAP-AKA/EAP-SIM Subtypes:
AKA_Challenge = 1
AKA_Authentication_Reject = 2
AKA_Synchronization_Failure = 4
AKA_Identity = 5
SIM_Start = 10
SIM_Challenge = 11
AKA_Notification = 12
SIM_Notification = 12
AKA_Reauthentication = 13
SIM_Reauthentication = 13
AKA_Client_Error = 14
SIM_Client_Error = 14
#EAP-AKA/EAP-SIM Atrributes:
AT_RAND = 1
AT_AUTN = 2
AT_RES = 3
AT_AUTS = 4
AT_PADDING = 6
AT_NONCE_MT = 7
AT_PERMANENT_ID_REQ = 10
AT_MAC = 11
AT_NOTIFICATION = 12
AT_ANY_ID_REQ = 13
AT_IDENTITY = 14
AT_VERSION_LIST = 15
AT_SELECTED_VERSION = 16
AT_FULLAUTH_ID_REQ = 17
AT_COUNTER = 19
AT_COUNTER_TOO_SMALL = 20
AT_NONCE_S = 21
AT_CLIENT_ERROR_CODE = 22
AT_IV = 129
AT_ENCR_DATA = 130
AT_NEXT_PSEUDONYM = 132
AT_NEXT_REAUTH_ID = 133
AT_CHECKCODE = 134
AT_RESULT_IND = 135
# Role
ROLE_INITIATOR = 1
ROLE_RESPONDER = 0
class swu():
def __init__(self, source_address,epdg_address,apn,modem,default_gateway,mcc,mnc,imsi,ki,op,opc,netns,sqn):
self.source_address = source_address
self.epdg_address = epdg_address
self.apn = apn
self.com_port = modem
self.default_gateway = default_gateway
self.mcc = mcc
self.mnc = mnc
self.imsi = imsi
self.ki = ki
self.op = op
self.opc = opc
self.netns_name = netns
self.sqn = sqn
self.set_variables()
self.set_udp() # default
self.create_socket(self.client_address)
self.create_socket_nat(self.client_address_nat)
self.create_socket_esp(self.client_address_esp)
self.userplane_mode = ESP_PROTOCOL
self.sk_ENCR_NULL_pad_length = 0 #[0 or 1 byte] SK payload is not definied in RFC for IKEv2. Some vendors don't use pad length byte, others use.
def set_variables(self):
self.port = DEFAULT_IKE_PORT
self.port_nat = DEFAULT_IKE_NAT_TRAVERSAL_PORT
self.client_address = (self.source_address,self.port)
self.client_address_nat = (self.source_address,self.port_nat)
self.client_address_esp = (self.source_address,0)
self.timeout = DEFAULT_TIMEOUT_UDP
self.state = 0
self.server_address = (self.epdg_address, self.port)
self.server_address_nat = (self.epdg_address, self.port_nat)
self.server_address_esp = (self.epdg_address, 0)
self.message_id_request = 0
self.message_id_responses = 0
self.role = ROLE_INITIATOR
self.old_ike_message_received = False
self.ike_spi_initiator_old = None
self.ike_spi_responder_old = None
self.next_reauth_id = None
self.check_nat = True
self.set_identification(IDI,ID_RFC822_ADDR,'0' + self.imsi + '@nai.epc.mnc' + self.mnc + '.mcc' + self.mcc + '.3gppnetwork.org')
# self.set_identification(IDR,ID_FQDN, self.apn + '.apn.epc.mnc' + self.mnc + '.mcc' + self.mcc + '.3gppnetwork.org')
self.set_identification(IDR,ID_FQDN, self.apn)
self.ike_decoded_header = {}
self.decodable_payloads = [
SA,
KE,
IDI,
IDR,
CERT,
CERTREQ,
AUTH,
NINR,
N,
D,
V,
TSI,
TSR,
SK,
CP,
EAP
]
self.iana_diffie_hellman = {
MODP_768_bit: 768,
MODP_1024_bit: 1024,
MODP_1536_bit: 1536,
MODP_2048_bit: 2048,
MODP_3072_bit: 3072,
MODP_4096_bit: 4096,
MODP_6144_bit: 6144,
MODP_8192_bit: 8192
}
self.prf_function = {
PRF_HMAC_MD5 : hashes.MD5(),
PRF_HMAC_SHA1 : hashes.SHA1(),
#PRF_HMAC_TIGER : 3
#PRF_AES128_XCBC : 4
PRF_HMAC_SHA2_256 : hashes.SHA256(),
PRF_HMAC_SHA2_384 : hashes.SHA384(),
PRF_HMAC_SHA2_512 : hashes.SHA512()
#PRF_AES128_CMAC : 8
}
self.prf_key_len_bytes = {
PRF_HMAC_MD5 : 16,
PRF_HMAC_SHA1 : 20,
#PRF_HMAC_TIGER : -,
PRF_AES128_XCBC : 16,
PRF_HMAC_SHA2_256 : 32,
PRF_HMAC_SHA2_384 : 48,
PRF_HMAC_SHA2_512 : 64,
PRF_AES128_CMAC : 16,
}
self.integ_function = {
NONE : None,
AUTH_HMAC_MD5_96 : hashes.MD5(),
AUTH_HMAC_SHA1_96 : hashes.SHA1(),
#AUTH_DES_MAC : -,
#AUTH_KPDK_MD5 : -,
#AUTH_AES_XCBC_96 : 16,
#AUTH_HMAC_MD5_128 : -,
#AUTH_HMAC_SHA1_160 : -,
#AUTH_AES_CMAC_96 : -,
#AUTH_AES_128_GMAC : 16,
#AUTH_AES_192_GMAC : 24,
#AUTH_AES_256_GMAC : 32,
AUTH_HMAC_SHA2_256_128 : hashes.SHA256(),
AUTH_HMAC_SHA2_384_192 : hashes.SHA384(),
AUTH_HMAC_SHA2_512_256 : hashes.SHA512()
}
self.integ_key_len_bytes = {
NONE : 0,
AUTH_HMAC_MD5_96 : 16,
AUTH_HMAC_SHA1_96 : 20,
#AUTH_DES_MAC : -,
#AUTH_KPDK_MD5 : -,
#AUTH_AES_XCBC_96 : 16,
#AUTH_HMAC_MD5_128 : -,
#AUTH_HMAC_SHA1_160 : -,
#AUTH_AES_CMAC_96 : -,
#AUTH_AES_128_GMAC : 16,
#AUTH_AES_192_GMAC : 24,
#AUTH_AES_256_GMAC : 32,
AUTH_HMAC_SHA2_256_128 : 32,
AUTH_HMAC_SHA2_384_192 : 48,
AUTH_HMAC_SHA2_512_256 : 64
}
self.integ_key_truncated_len_bytes = {
NONE : 0,
AUTH_HMAC_MD5_96 : 12,
AUTH_HMAC_SHA1_96 : 12,
#AUTH_DES_MAC : -,
#AUTH_KPDK_MD5 : -,
#AUTH_AES_XCBC_96 : 12,
#AUTH_HMAC_MD5_128 : -,
#AUTH_HMAC_SHA1_160 : -,
#AUTH_AES_CMAC_96 : -,
#AUTH_AES_128_GMAC : 16?,
#AUTH_AES_192_GMAC : 24?,
#AUTH_AES_256_GMAC : 32?,
AUTH_HMAC_SHA2_256_128 : 16,
AUTH_HMAC_SHA2_384_192 : 24,
AUTH_HMAC_SHA2_512_256 : 32
}
self.configuration_payload_len_bytes = {
INTERNAL_IP4_ADDRESS : 4,
INTERNAL_IP4_NETMASK : 4,
INTERNAL_IP4_DNS : 4,
INTERNAL_IP4_NBNS : 4,
INTERNAL_IP4_DHCP : 4,
APPLICATION_VERSION : None,
INTERNAL_IP6_ADDRESS : 16,
INTERNAL_IP6_DNS : 16,
INTERNAL_IP6_DHCP : 16,
INTERNAL_IP4_SUBNET : 8,
SUPPORTED_ATTRIBUTES : None,
INTERNAL_IP6_SUBNET : 17,
MIP6_HOME_PREFIX : 21,
INTERNAL_IP6_LINK : None,
INTERNAL_IP6_PREFIX : 17,
HOME_AGENT_ADDRESS : None, #16 or 20
P_CSCF_IP4_ADDRESS : 4,
P_CSCF_IP6_ADDRESS : 16,
FTT_KAT : 2,
EXTERNAL_SOURCE_IP4_NAT_INFO : 6,
TIMEOUT_PERIOD_FOR_LIVENESS_CHECK : 4,
INTERNAL_DNS_DOMAIN : None,
INTERNAL_DNSSEC_TA : None
}
self.errors = {
OK : 'OK',
TIMEOUT : 'TIMEOUT',
REPEAT_STATE : 'REPEAT_STATE',
DECODING_ERROR : 'DECODING_ERROR',
MANDATORY_INFORMATION_MISSING : 'MANDATORY_INFORMATION_MISSING',
OTHER_ERROR : 'OTHER_ERROR'
}
def return_integrity_algorithm_name(self):
integ_alg = {
AUTH_HMAC_MD5_96 : "HMAC_MD5_96 [RFC2403]",
AUTH_HMAC_SHA1_96 : "HMAC_SHA1_96 [RFC2404]",
AUTH_HMAC_SHA2_256_128 : "HMAC_SHA2_256_128 [RFC4868]",
AUTH_HMAC_SHA2_384_192 : "HMAC_SHA2_384_192 [RFC4868]",
AUTH_HMAC_SHA2_512_256 : "HMAC_SHA2_512_256 [RFC4868]",
NONE : "NONE [RFC4306]"
}
return integ_alg.get(self.negotiated_integrity_algorithm,'UNKNOWN')
def return_encryption_algorithm_name(self):
encr_alg = ''
key_size = self.negotiated_encryption_algorithm_key_size
if key_size == 128 and self.negotiated_encryption_algorithm == ENCR_AES_CBC:
encr_alg = "AES-CBC-128 [RFC3602]"
elif key_size == 256 and self.negotiated_encryption_algorithm == ENCR_AES_CBC:
encr_alg = "AES-CBC-256 [RFC3602]"
elif self.negotiated_encryption_algorithm == ENCR_NULL:
encr_alg = "NULL [RFC2410]"
return encr_alg
def return_integrity_algorithm_child_name(self):
integ_alg = {
AUTH_HMAC_MD5_96 : "HMAC-MD5-96 [RFC2403]",
AUTH_HMAC_SHA1_96 : "HMAC-SHA-1-96 [RFC2404]",
AUTH_HMAC_SHA2_256_128 : "HMAC-SHA-256-128 [RFC4868]",
AUTH_HMAC_SHA2_384_192 : "HMAC-SHA-384-192 [RFC4868]",
AUTH_HMAC_SHA2_512_256 : "HMAC-SHA-512-256 [RFC4868]",
NONE : "NULL"
}
return integ_alg.get(self.negotiated_integrity_algorithm_child,'UNKNOWN')
def return_encryption_algorithm_child_name(self):
encr_alg = ''
if self.negotiated_encryption_algorithm_child == ENCR_AES_CBC:
encr_alg = "AES-CBC [RFC3602]"
elif self.negotiated_encryption_algorithm_child == ENCR_AES_GCM_8:
encr_alg = "AES-GCM [RFC4106]"
elif self.negotiated_encryption_algorithm_child == ENCR_AES_GCM_12:
encr_alg = "AES-GCM [RFC4106]"
elif self.negotiated_encryption_algorithm_child == ENCR_AES_GCM_16:
encr_alg = "AES-GCM [RFC4106]"
elif self.negotiated_encryption_algorithm_child == ENCR_NULL:
encr_alg = "NULL"
return encr_alg
def print_ikev2_decryption_table(self):
print('IKEv2 DECRYPTION TABLE INFO (Wireshark):')
text = toHex(self.ike_spi_initiator) + ',' + toHex(self.ike_spi_responder) + ','
text += toHex(self.SK_EI) + ',' + toHex(self.SK_ER) + ',"' + self.return_encryption_algorithm_name() + '",'
text += toHex(self.SK_AI) + ',' + toHex(self.SK_AR) + ',"' + self.return_integrity_algorithm_name() + '"'
print(text)
text = toHex(self.ike_spi_responder) + ',' + toHex(self.ike_spi_initiator) + ','
text += toHex(self.SK_ER) + ',' + toHex(self.SK_EI) + ',"' + self.return_encryption_algorithm_name() + '",'
text += toHex(self.SK_AR) + ',' + toHex(self.SK_AI) + ',"' + self.return_integrity_algorithm_name() + '"'
print(text)
def print_esp_sa(self):
print('ESP SA INFO (wireshark):')
text = '"IPv4","' + self.source_address + '","' + self.epdg_address + '","0x' + toHex(self.spi_resp_child)
text += '","' + self.return_encryption_algorithm_child_name() + '","0x' + toHex(self.SK_IPSEC_EI)
text += '","' + self.return_integrity_algorithm_child_name() + '","0x' + toHex(self.SK_IPSEC_AI) + '"'
print(text)
text = '"IPv4","' + self.epdg_address + '","' + self.source_address + '","0x' + toHex(self.spi_init_child)
text += '","' + self.return_encryption_algorithm_child_name() + '","0x' + toHex(self.SK_IPSEC_ER)
text += '","' + self.return_integrity_algorithm_child_name() + '","0x' + toHex(self.SK_IPSEC_AR) + '"'
print(text)
def set_timeout(self,value):
self.timeout = value
def set_udp(self):
self.socket_type = UDP
def create_socket(self,client_address):
if self.socket_type == UDP:
self.socket = socket.socket(socket.AF_INET, socket.SOCK_DGRAM)
else:
exit()
self.socket.bind(client_address)
self.socket.settimeout(self.timeout)
def create_socket_nat(self,client_address):
if self.socket_type == UDP:
self.socket_nat = socket.socket(socket.AF_INET, socket.SOCK_DGRAM)
else:
exit()
self.socket_nat.bind(client_address)
self.socket_nat.settimeout(self.timeout)
def create_socket_esp(self,client_address):
self.socket_esp = socket.socket(socket.AF_INET, socket.SOCK_RAW, ESP_PROTOCOL)
self.socket_esp.bind(client_address)
def set_server(self,address):
self.server_address = (address,self.port)
def set_server_nat(self,address):
self.server_address_nat = (address,self.port_nat)
def set_server_esp(self,address):
self.server_address_esp = (address,0)
def send_data(self, data):
if self.userplane_mode == ESP_PROTOCOL:
self.socket.sendto(data, self.server_address)
else:
self.socket_nat.sendto(b'\x00'*4 + data, self.server_address_nat)
def return_random_bytes(self,size):
if size == 0: return b''
if size == 4: return struct.pack('!I', random.randrange(pow(2,32)-1))
if size == 8: return struct.pack('!Q', random.randrange(pow(2,64)-1))
if size == 16: return struct.pack('!Q', random.randrange(pow(2,64)-1)) + struct.pack('!Q', random.randrange(pow(2,64)-1))
def return_random_int(self,size):
if size == 4: return random.randrange(pow(2,32)-1)
if size == 8: return random.randrange(pow(2,64)-1)
if size == 16: return random.randrange(pow(2,128)-1)
def return_flags(self,value): #works with value or tuple
if type(value) is int:
rvi = (value//8)%8
return (rvi // 4, (rvi//2)%2, rvi%2)
else: #is a tuple with (r,v,i)
return 32*value[0]+16*value[1]+8*value[2]
def dh_create_private_key_and_public_bytes(self,key_size):
prime = {
768: 0xFFFFFFFFFFFFFFFFC90FDAA22168C234C4C6628B80DC1CD129024E088A67CC74020BBEA63B139B22514A08798E3404DDEF9519B3CD3A431B302B0A6DF25F14374FE1356D6D51C245E485B576625E7EC6F44C42E9A63A3620FFFFFFFFFFFFFFFF,
1024: 0xFFFFFFFFFFFFFFFFC90FDAA22168C234C4C6628B80DC1CD129024E088A67CC74020BBEA63B139B22514A08798E3404DDEF9519B3CD3A431B302B0A6DF25F14374FE1356D6D51C245E485B576625E7EC6F44C42E9A637ED6B0BFF5CB6F406B7EDEE386BFB5A899FA5AE9F24117C4B1FE649286651ECE65381FFFFFFFFFFFFFFFF,
1536: 0xffffffffffffffffc90fdaa22168c234c4c6628b80dc1cd129024e088a67cc74020bbea63b139b22514a08798e3404ddef9519b3cd3a431b302b0a6df25f14374fe1356d6d51c245e485b576625e7ec6f44c42e9a637ed6b0bff5cb6f406b7edee386bfb5a899fa5ae9f24117c4b1fe649286651ece45b3dc2007cb8a163bf0598da48361c55d39a69163fa8fd24cf5f83655d23dca3ad961c62f356208552bb9ed529077096966d670c354e4abc9804f1746c08ca237327ffffffffffffffff,
2048: 0xffffffffffffffffc90fdaa22168c234c4c6628b80dc1cd129024e088a67cc74020bbea63b139b22514a08798e3404ddef9519b3cd3a431b302b0a6df25f14374fe1356d6d51c245e485b576625e7ec6f44c42e9a637ed6b0bff5cb6f406b7edee386bfb5a899fa5ae9f24117c4b1fe649286651ece45b3dc2007cb8a163bf0598da48361c55d39a69163fa8fd24cf5f83655d23dca3ad961c62f356208552bb9ed529077096966d670c354e4abc9804f1746c08ca18217c32905e462e36ce3be39e772c180e86039b2783a2ec07a28fb5c55df06f4c52c9de2bcbf6955817183995497cea956ae515d2261898fa051015728e5a8aacaa68ffffffffffffffff,
3072: 0xffffffffffffffffc90fdaa22168c234c4c6628b80dc1cd129024e088a67cc74020bbea63b139b22514a08798e3404ddef9519b3cd3a431b302b0a6df25f14374fe1356d6d51c245e485b576625e7ec6f44c42e9a637ed6b0bff5cb6f406b7edee386bfb5a899fa5ae9f24117c4b1fe649286651ece45b3dc2007cb8a163bf0598da48361c55d39a69163fa8fd24cf5f83655d23dca3ad961c62f356208552bb9ed529077096966d670c354e4abc9804f1746c08ca18217c32905e462e36ce3be39e772c180e86039b2783a2ec07a28fb5c55df06f4c52c9de2bcbf6955817183995497cea956ae515d2261898fa051015728e5a8aaac42dad33170d04507a33a85521abdf1cba64ecfb850458dbef0a8aea71575d060c7db3970f85a6e1e4c7abf5ae8cdb0933d71e8c94e04a25619dcee3d2261ad2ee6bf12ffa06d98a0864d87602733ec86a64521f2b18177b200cbbe117577a615d6c770988c0bad946e208e24fa074e5ab3143db5bfce0fd108e4b82d120a93ad2caffffffffffffffff,
4096: 0xffffffffffffffffc90fdaa22168c234c4c6628b80dc1cd129024e088a67cc74020bbea63b139b22514a08798e3404ddef9519b3cd3a431b302b0a6df25f14374fe1356d6d51c245e485b576625e7ec6f44c42e9a637ed6b0bff5cb6f406b7edee386bfb5a899fa5ae9f24117c4b1fe649286651ece45b3dc2007cb8a163bf0598da48361c55d39a69163fa8fd24cf5f83655d23dca3ad961c62f356208552bb9ed529077096966d670c354e4abc9804f1746c08ca18217c32905e462e36ce3be39e772c180e86039b2783a2ec07a28fb5c55df06f4c52c9de2bcbf6955817183995497cea956ae515d2261898fa051015728e5a8aaac42dad33170d04507a33a85521abdf1cba64ecfb850458dbef0a8aea71575d060c7db3970f85a6e1e4c7abf5ae8cdb0933d71e8c94e04a25619dcee3d2261ad2ee6bf12ffa06d98a0864d87602733ec86a64521f2b18177b200cbbe117577a615d6c770988c0bad946e208e24fa074e5ab3143db5bfce0fd108e4b82d120a92108011a723c12a787e6d788719a10bdba5b2699c327186af4e23c1a946834b6150bda2583e9ca2ad44ce8dbbbc2db04de8ef92e8efc141fbecaa6287c59474e6bc05d99b2964fa090c3a2233ba186515be7ed1f612970cee2d7afb81bdd762170481cd0069127d5b05aa993b4ea988d8fddc186ffb7dc90a6c08f4df435c934063199ffffffffffffffff,
6144: 0xffffffffffffffffc90fdaa22168c234c4c6628b80dc1cd129024e088a67cc74020bbea63b139b22514a08798e3404ddef9519b3cd3a431b302b0a6df25f14374fe1356d6d51c245e485b576625e7ec6f44c42e9a637ed6b0bff5cb6f406b7edee386bfb5a899fa5ae9f24117c4b1fe649286651ece45b3dc2007cb8a163bf0598da48361c55d39a69163fa8fd24cf5f83655d23dca3ad961c62f356208552bb9ed529077096966d670c354e4abc9804f1746c08ca18217c32905e462e36ce3be39e772c180e86039b2783a2ec07a28fb5c55df06f4c52c9de2bcbf6955817183995497cea956ae515d2261898fa051015728e5a8aaac42dad33170d04507a33a85521abdf1cba64ecfb850458dbef0a8aea71575d060c7db3970f85a6e1e4c7abf5ae8cdb0933d71e8c94e04a25619dcee3d2261ad2ee6bf12ffa06d98a0864d87602733ec86a64521f2b18177b200cbbe117577a615d6c770988c0bad946e208e24fa074e5ab3143db5bfce0fd108e4b82d120a92108011a723c12a787e6d788719a10bdba5b2699c327186af4e23c1a946834b6150bda2583e9ca2ad44ce8dbbbc2db04de8ef92e8efc141fbecaa6287c59474e6bc05d99b2964fa090c3a2233ba186515be7ed1f612970cee2d7afb81bdd762170481cd0069127d5b05aa993b4ea988d8fddc186ffb7dc90a6c08f4df435c93402849236c3fab4d27c7026c1d4dcb2602646dec9751e763dba37bdf8ff9406ad9e530ee5db382f413001aeb06a53ed9027d831179727b0865a8918da3edbebcf9b14ed44ce6cbaced4bb1bdb7f1447e6cc254b332051512bd7af426fb8f401378cd2bf5983ca01c64b92ecf032ea15d1721d03f482d7ce6e74fef6d55e702f46980c82b5a84031900b1c9e59e7c97fbec7e8f323a97a7e36cc88be0f1d45b7ff585ac54bd407b22b4154aacc8f6d7ebf48e1d814cc5ed20f8037e0a79715eef29be32806a1d58bb7c5da76f550aa3d8a1fbff0eb19ccb1a313d55cda56c9ec2ef29632387fe8d76e3c0468043e8f663f4860ee12bf2d5b0b7474d6e694f91e6dcc4024ffffffffffffffff,
8192: 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
}
g = 2
self.pn = dh.DHParameterNumbers(prime.get(key_size),g)
parameters = self.pn.parameters()
self.dh_private_key = parameters.generate_private_key()
self.dh_public_key_bytes = self.dh_private_key.public_key().public_numbers().y.to_bytes(key_size//8,'big')
def dh_calculate_shared_key(self,peer_public_key_bytes):
peer_public_numbers = dh.DHPublicNumbers(int.from_bytes(peer_public_key_bytes, byteorder='big'), self.pn)
peer_public_key = peer_public_numbers.public_key()
self.dh_shared_key = self.dh_private_key.exchange(peer_public_key)
print('DIFFIE-HELLMAN KEY',toHex(self.dh_shared_key))
def get_identity(self):
imsi = return_imsi(self.com_port)
self.imsi = imsi
self.set_identification(IDI,ID_RFC822_ADDR,'0' + self.imsi + '@nai.epc.mnc' + self.mnc + '.mcc' + self.mcc + '.3gppnetwork.org')
def encode_eap_at_identity(self, identity):
""" Returns the EAP AT Identity as bytes """
# 4 bytes -> header (type, at_len, identity_len)
full_len = 4 + len(identity)
at_len = int(full_len / 4)
pad = 0
if full_len % 4:
pad = 4 - (full_len % 4)
at_len += 1
# 0e -> AT_IDENTITY
eap_at_identity = (bytes([0x0e, at_len])
+ struct.pack('>H', len(identity))
+ identity.encode("utf-8")
+ pad * b'\x00')
return eap_at_identity
def eap_keys_calculation(self,ck, ik):
identity = self.identification_initiator[1].encode('utf-8') #idi value
digest = hashes.Hash(hashes.SHA1())
digest.update(identity + ik + ck)
MK = digest.finalize()
print('MK',toHex(MK))
result = b''
xval = MK
modulus = pow(2,160)
for i in range(4):
w0 = sha1_dss(xval)
xval = ((int.from_bytes(xval,'big') + int.from_bytes(w0, 'big') + 1 ) % modulus).to_bytes(20,'big')
w1 = sha1_dss(xval)
xval = ((int.from_bytes(xval,'big') + int.from_bytes(w1, 'big') + 1 ) % modulus).to_bytes(20,'big')
result += w0 + w1
# return
return result[0:16],result[16:32],result[32:96],result[96:160],MK
def eap_keys_calculation_fast_reauth(self,counter, nonce_s):
identity = self.identification_initiator[1].encode('utf-8') #idi value
digest = hashes.Hash(hashes.SHA1())
digest.update(identity + struct.pack('!H',counter) + nonce_s + self.MK)
XKEY = digest.finalize()
print('XKEY',toHex(XKEY))
result = b''
xval = XKEY
modulus = pow(2,160)
for i in range(4):
w0 = sha1_dss(xval)
xval = ((int.from_bytes(xval,'big') + int.from_bytes(w0, 'big') + 1 ) % modulus).to_bytes(20,'big')
w1 = sha1_dss(xval)
xval = ((int.from_bytes(xval,'big') + int.from_bytes(w1, 'big') + 1 ) % modulus).to_bytes(20,'big')
result += w0 + w1
# return
return result[0:64],result[64:128],XKEY
#######################################################################################################################
#######################################################################################################################
################ D E C O D E F U N C T I O N S ################
#######################################################################################################################
#######################################################################################################################
def decode_header(self, data):
try:
#if True:
self.ike_decoded_header['initiator_spi'] = data[0:8]
self.ike_decoded_header['responder_spi'] = data[8:16]
self.ike_decoded_header['next_payload'] = data[16]
self.ike_decoded_header['major_version'] = data[17] // 16
self.ike_decoded_header['minor_version'] = data[17] % 16
self.ike_decoded_header['exchange_type'] = data[18]
self.ike_decoded_header['flags'] = self.return_flags(data[19])
self.ike_decoded_header['message_id'] = struct.unpack("!I",data[20:24])[0]
self.ike_decoded_header['length'] = struct.unpack("!I", data[24:28])[0] #header + payloads
if self.ike_spi_responder == (0).to_bytes(8,'big') and self.ike_spi_initiator == self.ike_decoded_header['initiator_spi'] :
self.ike_spi_responder = self.ike_decoded_header['responder_spi']
self.ike_decoded_header_ok = True
self.old_ike_message_received = False
return
if self.ike_spi_initiator == self.ike_decoded_header['initiator_spi'] and self.ike_spi_responder == self.ike_decoded_header['responder_spi']:
self.ike_decoded_header_ok = True
self.old_ike_message_received = False
return
if self.ike_spi_initiator_old == self.ike_decoded_header['initiator_spi'] and self.ike_spi_responder_old == self.ike_decoded_header['responder_spi']:
self.ike_decoded_header_ok = True
self.old_ike_message_received = True
return
self.ike_decoded_header_ok = False
return
except:
self.ike_decoded_header_ok = False
def decode_generic_payload_header(self,data, position, payload_type):
ike_decoded_payload_header = {}
ike_decoded_payload_header['next_payload'] = data[position]
ike_decoded_payload_header['C'] = data[position+1] // 128
ike_decoded_payload_header['length'] = struct.unpack("!H", data[position+2:position+4])[0]
ike_decoded_payload_header['data'] = data[position+4:position+ike_decoded_payload_header['length']]
#to be used for SK decryption
self.current_next_payload = ike_decoded_payload_header['next_payload']
if payload_type in self.decodable_payloads:
ike_decoded_payload_header['decoded'] = [payload_type, self.decode_payload_type(payload_type, ike_decoded_payload_header['data'])]
else:
ike_decoded_payload_header['decoded'] = [payload_type, None]
position += ike_decoded_payload_header['length']
return position, ike_decoded_payload_header['decoded'], ike_decoded_payload_header['next_payload']
def decode_payload(self, data, next_payload, position=28): #by default it uses position 28 for normal
decoded_payload = []
while position < len(data):
position, payload_decoded, next_payload = self.decode_generic_payload_header(data, position, next_payload)
decoded_payload.append(payload_decoded)
return (True, decoded_payload)
def decode_ike(self, data):
self.current_packet_received = data
try:
#if True:
self.decode_header(data)
if self.ike_decoded_header_ok == False:
self.ike_decoded_ok = False
else:
(self.decoded_payload_ok, self.decoded_payload) = self.decode_payload(data, self.ike_decoded_header['next_payload'])
if self.decoded_payload_ok == False:
self.ike_decoded_ok = False
else:
self.ike_decoded_ok = True
print('received decoded message:')
print(self.decoded_payload)
except:
self.ike_decoded_ok = False
def decode_payload_type(self, type, data):
payload_type = {
SA: self.decode_payload_type_sa ,
KE: self.decode_payload_type_ke ,
IDI: self.decode_payload_type_idi ,
IDR: self.decode_payload_type_idr ,
CERT: self.decode_payload_type_cert ,
CERTREQ: self.decode_payload_type_certreq ,
AUTH: self.decode_payload_type_auth ,
NINR: self.decode_payload_type_ninr ,
N: self.decode_payload_type_n ,
D: self.decode_payload_type_d ,
V: self.decode_payload_type_v ,
TSI: self.decode_payload_type_tsi_tsr ,
TSR: self.decode_payload_type_tsi_tsr ,
SK: self.decode_payload_type_sk ,
CP: self.decode_payload_type_cp ,
EAP: self.decode_payload_type_eap
}
func = payload_type.get(type, self.unsupported_payload_type)
return func(data)
def decode_payload_type_sa(self, data):
spi = b''
if data[5]!= 0:
spi = data[8:8+data[6]]
return [data[4],data[5],spi] # proposal number, protocol_id, spi
def decode_payload_type_ke(self, data):
return [struct.unpack("!H", data[0:2])[0], data[4:]] # diffie-hellman group, key
def decode_payload_type_idi(self, data):
return [data[0],data[4:]]
def decode_payload_type_idr(self, data):
return [data[0],data[4:]]
def decode_payload_type_cert(self, data):
return [data[0],data[1:]]
def decode_payload_type_certreq(self, data):
return [data[0],data[1:]]
def decode_payload_type_auth(self, data):
return [data[0],data[4:]]
def decode_payload_type_ninr(self, data):
return [data] # nounce_received
def decode_payload_type_n(self, data):
spi = b''
notification_data = b''
if data[1]!= 0: #spi present
spi = data[4:4+data[1]]
if len(data)>4 +data[1]: #notification data present
notification_data = data[4+data[1]:]
return [data[0],struct.unpack("!H", data[2:4])[0],spi,notification_data] # protocol_id, notify_message_type, spi, notification_data
def decode_payload_type_d(self, data):
spi = b''
spi_list = []
num_of_spi = 0
if data[1]!= 0: #spi present
num_of_spi = struct.unpack("!H", data[2:4])[0]
for i in range(num_of_spi):
spi_list.append(data[4+i*data[1]:4+(i+1)*data[1]])
return [data[0],num_of_spi, spi_list] # [protocol_id, number of spi, [spi1, spi2, ... spi n]]
def decode_payload_type_v(self, data):
return [data]
def decode_payload_type_tsi_tsr(self, data):
num_of_ts = data[0]
ts_list = []
position = 4
for i in range(num_of_ts):
ts_type = data[position]
protocol_id = data[position+1]
start_port, end_port = struct.unpack("!H", data[position+4:position+6])[0], struct.unpack("!H", data[position+6:position+8])[0]
if ts_type == TS_IPV4_ADDR_RANGE:
starting_address = socket.inet_ntop(socket.AF_INET,data[position+8:position+12])
ending_address = socket.inet_ntop(socket.AF_INET,data[position+12:position+16])
position += 16
elif ts_type == TS_IPV6_ADDR_RANGE:
starting_address = socket.inet_ntop(socket.AF_INET6,data[position+8:position+24])
ending_address = socket.inet_ntop(socket.AF_INET6,data[position+24:position+40])
position += 40
ts_list.append((ts_type,protocol_id,start_port,end_port,starting_address,ending_address))
return [num_of_ts,ts_list]