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)
Exemple #2
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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
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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
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 def counter_block():
     return bits_to_string(bin_nonce + bin_iv + string_to_bits(ctr()))
Exemple #9
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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
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def string_to_int(s):
    return bits_to_int(string_to_bits(s))