def hexbinstrxor(_hex, _bin):
# convert both the hex and bin string into ASCII-characters string
str1 = bits_to_string(
pad_to_block(convert_to_bits(int(_hex, 16)),
len(_hex) * 4))
str2 = bits_to_string([b for b in _bin])
size = min(len(str1), len(str2))
return ''.join(
[chr(ord(c1) ^ ord(c2)) for c1, c2 in zip(str1[:size], str2[:size])])
def hex2str(_hex):
"""
the following function will be used to convert
a hex message into a string of characters
"""
if not is_hex(_hex):
raise Exception('Key to AES_CTR must be hex-digits')
hex_int = int(_hex, 16)
hex_bin = convert_to_bits(hex_int)
return bits_to_string(pad_to_block(hex_bin, len(_hex) * 4))
def hex2str(_hex):
"""
the following function will be used to convert
a hex message into a string of characters
"""
if not is_hex(_hex):
raise Exception('Key to AES_CTR must be hex-digits')
hex_int = int(_hex, 16)
hex_bin = convert_to_bits(hex_int)
return bits_to_string(pad_to_block(hex_bin, len(_hex) * 4))
def hex_blks2str(_blks_list):
"""
the following function will be used to convert hex-digits blocks
of the plaintext into a single string of ASCII-characters
"""
list_str = ''.join((' '.join(_blks_list)).split())
num_hex_digits = len(list_str)
hex_int = int(list_str, 16)
hex_bin = convert_to_bits(hex_int)
return bits_to_string(pad_to_block(hex_bin, num_hex_digits * 4))
def msg_hex2str(self):
"""
the following function will be used to convert
a hex message into a string of characters
"""
if not self.is_empty():
hex_int = int(self.data, 16)
hex_bin = convert_to_bits(hex_int)
return bits_to_string(pad_to_block(hex_bin, ASCII_BITS))
else:
raise Exception('Message is EMPTY')
def msg_hex2str(self):
"""
the following function will be used to convert
a hex message into a string of characters
"""
if not self.is_empty():
hex_int = int(self.data, 16)
hex_bin = convert_to_bits(hex_int)
return bits_to_string(pad_to_block(hex_bin, ASCII_BITS))
else:
raise Exception('Message is EMPTY')
def counter_block(): return bits_to_string(bin_nonce + bin_iv + string_to_bits(ctr()))
def counter_block():
return bits_to_string(bin_nonce + bin_iv + string_to_bits(ctr()))
def message_value(message):
message = bits_to_string(pad_to_block(convert_to_bits(message), 8))
return bill_value(message)
def int_to_string(n):
return bits_to_string(pad_bits(convert_to_bits(n), 8))