xn-reverser

Enumerate possible ASCII text being spoofed by a particular IDN domain name

pip install xn-reverser

The basic algorithm for how this library works is as follows:

Convert raw xn-- IDN domain to Unicode representation (using idna library)
For each Unicode char in the domain:
Check a pre-built mapping for possible ASCII characters that look similar to the Unicode character (i.e. plaintext ASCII characters that the Unicode character could be spoofing)
Compute the Cartesian product of the character lists (using itertools.product) to generate the possible plaintext domain names

import xn_reverser

result = xn_reverser.xn_reverser("xn--80ak6aa92e.com")
print(result["possible_spoofed_ascii"])

xn_reverser() returns a dict containing the following elements:

domain_raw (string): the actual xn-- raw IDN domain provided as the input
domain_idn_rendered (string): the rendered Unicode form of the IDN domain
possible_spoofed_ascii (list): a list of possible ASCII domains converted from the IDN form

Provide feedback