Encrypts an IPv4 address to another IPv4 address
Can be used to "anonymize" logs, etc.
Takes as argument a CSV file and the index of a field containing IP addresses
Uses a custom 4-byte-block cipher, inspired from SipHash.
Set the variable KEY to a 16-byte secret key
Example use, with the default key some 16-byte key:
$ cat test.csv
a,127.0.0.1
b,8.8.8.8
c,1.2.3.4
$ python ipcrypt.py test.csv 1 e
a,114.62.227.59
b,46.48.51.50
c,171.238.15.199
$ python ipcrypt.py test.csv 1 e > tmp
$ python ipcrypt.py tmp 1 d
a,127.0.0.1
b,8.8.8.8
c,1.2.3.4
The Go version has a similar syntax; for example
$ go build ipcrypt.go
$ ./ipcrypt test.csv 1 e
a,114.62.227.59
b,46.48.51.50
c,171.238.15.199
Copyright (c) 2015 Jean-Philippe Aumasson jeanphilippe.aumasson@gmail.com
Under CC0 license http://creativecommons.org/publicdomain/zero/1.0/