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from __future__ import unicode_literals
from binascii import unhexlify, hexlify
from base64 import b64encode, b64decode
from six import integer_types
def value_encode(val, base64=False):
"""Encodes int into hex or base64."""
return b64_from(val) if base64 else hex_from(val)
def hex_from_b64(val):
"""Returns hex string representation for base64 encoded value.
:param str val:
:rtype: bytes|str
"""
return hex_from(b64decode(val))
def hex_from(val):
"""Returns hex string representation for a given value.
:param bytes|str|unicode|int|long val:
:rtype: bytes|str
"""
if isinstance(val, integer_types):
hex_str = '%x' % val
if len(hex_str) % 2:
hex_str = '0' + hex_str
return hex_str
return hexlify(val)
def int_from_hex(hexstr):
"""Returns int/long representation for a given hex string.
:param bytes|str|unicode hexstr:
:rtype: int|long
"""
return int(hexstr, 16)
def int_to_bytes(val):
"""Returns bytes representation for a given int/long.
:param int|long val:
:rtype: bytes|str
"""
hex_str = hex_from(val)
return unhexlify(hex_str)
def b64_from(val):
"""Returns base64 encoded bytes for a given int/long/bytes value.
:param int|long|bytes val:
:rtype: bytes|str
"""
if isinstance(val, integer_types):
val = int_to_bytes(val)
return b64encode(val).decode('ascii')
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