idncheck-old 0.1.0

Returns IDN restriction level of a string.

# IDNCheck

IDNcheck performs safety checks on international domain names. This might be useful if you want to see how likely a given domain is to be used for nefarious purposes such as phishing. It returns the unicode restriction level passed by a string, as described in Unicode Technical Standard #39, Unicode Security Mechanisms (see References).

Note: On first run, it will automatically download a file if it doesn’t exist: http://www.unicode.org/Public/UNIDATA/Scripts.txt

## How to use

Typical usage might look something like this:

python >>> import idncheck >>> idncheck.idncheck(“hello”) 1 >>> idncheck.idncheck(“φilosoφia”) 42 >>> idncheck.idncheck(“φilosoφia”, 3) # FIXME True >>> idncheck.idncheck(“paypal”) 1 >>> idncheck.idncheck(“paypаl”) 4 >>> idncheck.idncheck(“раура1”) 4

or

#!/usr/bin/env python

import idncheck

idncheck.idencheck(“φilosoφia”, 3): # FIXME

print(“I see what you’re doing there”)

## References

This tool serves as an implementation of the Restriction-Level detection described in Unicode Technical Standard #39, Unicode Security Mechanisms:

• [TR 39](http://www.unicode.org/reports/tr39/#Restriction_Level_Detection)

Additional use cases and details are available in these blog posts:

• [Gmail post](http://googleonlinesecurity.blogspot.com/2014/08/protecting-gmail-in-global-world.html)

• [Another Google post](http://googleenterprise.blogspot.com/2014/08/protecting-gmail-in-global-world.html)

## TODO

• Create a web service on a Gandi Python Simple Hosting instance