def str2hex(_str): """ the following function will be used to convert a strin chr message into hex-digits string """ str_bin = pad_to_block(string_to_bits(_str), ASCII_BITS) return hex(int(display_bits(str_bin), 2))[2:-1].zfill(len(str_bin) / 4)
def str2hex(_str):
"""
the following function will be used to convert
a strin chr message into hex-digits string
"""
str_bin = pad_to_block(string_to_bits(_str), ASCII_BITS)
return hex(int(display_bits(str_bin), 2))[2:-1].zfill(len(str_bin) / 4)
def test_counter_block_function():
hex_nonce = ''.join('00 6C B6 DB'.split())
print hex_nonce
hex_iv = ''.join('C0 54 3B 59 DA 48 D9 0B'.split())
print hex_iv
bin_nonce = pad_to_block(convert_to_bits(int(hex_nonce, 16)), len(hex_nonce)*4)
print bin_nonce
bin_iv = pad_to_block(convert_to_bits(int(hex_iv, 16)), len(hex_iv)*4)
ctr = Counter.new(32)
def counter_block():
return bits_to_string(bin_nonce + bin_iv + string_to_bits(ctr()))
final_str = hex(int(display_bits(string_to_bits(counter_block())), 2))[2:-1].zfill(32)
print final_str
print final_str == ''.join('00 6C B6 DB C0 54 3B 59 DA 48 D9 0B 00 00 00 01'.lower().split())
final_str = hex(int(display_bits(string_to_bits(counter_block())), 2))[2:-1].zfill(32)
print final_str
print final_str == ''.join('00 6C B6 DB C0 54 3B 59 DA 48 D9 0B 00 00 00 02'.lower().split())
def generate_bills(bill_amount, bill_count=100):
global _NONCES
_NONCES = []
bills = []
for _ in range(bill_count):
bill = create_bill(random.randint(0, 100), bill_amount)
bill_int = bits_to_int(string_to_bits(bill))
nonce = random_nonce()
t = blind_msg(bill_int, nonce, BANK_PUBLIC_KEY[0], BANK_PUBLIC_KEY[1])
_NONCES.append(nonce)
bills.append(t)
return bills
def test_counter_block_function():
hex_nonce = ''.join('00 6C B6 DB'.split())
print hex_nonce
hex_iv = ''.join('C0 54 3B 59 DA 48 D9 0B'.split())
print hex_iv
bin_nonce = pad_to_block(convert_to_bits(int(hex_nonce, 16)),
len(hex_nonce) * 4)
print bin_nonce
bin_iv = pad_to_block(convert_to_bits(int(hex_iv, 16)), len(hex_iv) * 4)
ctr = Counter.new(32)
def counter_block():
return bits_to_string(bin_nonce + bin_iv + string_to_bits(ctr()))
final_str = hex(int(display_bits(string_to_bits(counter_block())),
2))[2:-1].zfill(32)
print final_str
print final_str == ''.join(
'00 6C B6 DB C0 54 3B 59 DA 48 D9 0B 00 00 00 01'.lower().split())
final_str = hex(int(display_bits(string_to_bits(counter_block())),
2))[2:-1].zfill(32)
print final_str
print final_str == ''.join(
'00 6C B6 DB C0 54 3B 59 DA 48 D9 0B 00 00 00 02'.lower().split())
def counter_block(): return bits_to_string(bin_nonce + bin_iv + string_to_bits(ctr()))
def create_bill_message(i, bill_amount, nonce):
bill = create_bill(i, bill_amount)
# print "Created bill:", bill
bill_int = bits_to_int(string_to_bits(bill))
t = blind_msg(bill_int, nonce, BANK_PUBLIC_KEY[0], BANK_PUBLIC_KEY[1])
return t
def counter_block():
return bits_to_string(bin_nonce + bin_iv + string_to_bits(ctr()))
def create_bill_message(i, bill_amount, nonce):
bill = create_bill(i, bill_amount)
bill_int = bits_to_int(string_to_bits(bill))
t = blind_msg(bill_int, nonce, BANK_PUBLIC_KEY[0], BANK_PUBLIC_KEY[1])
return t
def string_to_int(s):
return bits_to_int(string_to_bits(s))