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Make derive_milenage_opc and calculate_luhn publicly available through utils.py

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Change-Id: I2effc85fd55da0981de0ada74dcb28b7e8e56a01
This commit is contained in:
Alexander Chemeris
2018-01-11 13:06:43 +09:00
parent e0d9d88cd5
commit 19fffa1db7
2 changed files with 22 additions and 19 deletions
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20
pySim-prog.py
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@@ -39,7 +39,7 @@ except ImportError:
from pySim.commands import SimCardCommands
from pySim.cards import _cards_classes
from pySim.utils import h2b, swap_nibbles, rpad
from pySim.utils import h2b, swap_nibbles, rpad, derive_milenage_opc, calculate_luhn
def parse_options():
@@ -234,24 +234,6 @@ def _dbi_binary_quote(s):
return ''.join(out)
def calculate_luhn(cc):
num = map(int, str(cc))
check_digit = 10 - sum(num[-2::-2] + [sum(divmod(d * 2, 10)) for d in num[::-2]]) % 10
return 0 if check_digit == 10 else check_digit
def derive_milenage_opc(ki_hex, op_hex):
"""
Run the milenage algorithm.
"""
from Crypto.Cipher import AES
from Crypto.Util.strxor import strxor
from pySim.utils import b2h
# We pass in hex string and now need to work on bytes
aes = AES.new(h2b(ki_hex))
opc_bytes = aes.encrypt(h2b(op_hex))
return b2h(strxor(opc_bytes, h2b(op_hex)))
def gen_parameters(opts):
"""Generates Name, ICCID, MCC, MNC, IMSI, SMSP, Ki, PIN-ADM from the
options given by the user"""

21
pySim/utils.py
View File

@@ -92,3 +92,24 @@ def enc_spn(name, hplmn_disp=False, oplmn_disp=False):
if hplmn_disp: byte1 = byte1|0x01
if oplmn_disp: byte1 = byte1|0x02
return i2h([byte1])+s2h(name)
def derive_milenage_opc(ki_hex, op_hex):
"""
Run the milenage algorithm to calculate OPC from Ki and OP
"""
from Crypto.Cipher import AES
from Crypto.Util.strxor import strxor
from pySim.utils import b2h
# We pass in hex string and now need to work on bytes
aes = AES.new(h2b(ki_hex))
opc_bytes = aes.encrypt(h2b(op_hex))
return b2h(strxor(opc_bytes, h2b(op_hex)))
def calculate_luhn(cc):
"""
Calculate Luhn checksum used in e.g. ICCID and IMEI
"""
num = map(int, str(cc))
check_digit = 10 - sum(num[-2::-2] + [sum(divmod(d * 2, 10)) for d in num[::-2]]) % 10
return 0 if check_digit == 10 else check_digit