commit 0a0bf4a2cde102bfaef5ea7ad3575156dccf39f9 Author: Damian Johnson atagar@torproject.org Date: Sun Jul 10 23:35:36 2011 -0700

Obscuring contact email addresses

Trying to make address scraping a tiny bit harder. --- src/cli/wizard.py | 71 +++++++++++++++++++++++++++++++++++++++++++++++++++++ 1 files changed, 71 insertions(+), 0 deletions(-)

diff --git a/src/cli/wizard.py b/src/cli/wizard.py index e5d6257..0f35247 100644 --- a/src/cli/wizard.py +++ b/src/cli/wizard.py @@ -3,8 +3,10 @@ Provides user prompts for setting up a new relay. This autogenerates a torrc that's used by arm to run its own tor instance. """

+import re import os import sys +import random import shutil import functools import curses @@ -79,6 +81,14 @@ MSG_COLOR = "green" OPTION_COLOR = "yellow" DISABLED_COLOR = "cyan"

+# bracketing pairs used in email address obscuring +BRACKETS = ((' ', ' '), + ('<', '>'), + ('[', ']'), + ('(', ')'), + ('{', '}'), + ('|', '|')) + # tor's defaults for config options, used to filter unneeded options TOR_DEFAULTS = {Options.BANDWIDTH: "5 MB", Options.REUSE: "10 minutes"} @@ -517,6 +527,9 @@ def getTorrc(relayType, config): elif key == Options.NOTICE: # notice option is only applied if using low ports value &= config[Options.LOWPORTS].getValue() + elif key == Options.CONTACT and _isEmailAddress(value): + # obscures the email address + value = _obscureEmailAddress(value)

templateOptions[key.upper()] = value

@@ -702,6 +715,64 @@ def _splitStr(msg, width):

return results

+def _isEmailAddress(address): + """ + True if the input is an email address, false otherwise. + """ + + # just checks if there's an '@' and '.' in the input w/o whitespace + emailMatcher = re.compile("\S*@\S*.\S*") + return emailMatcher.match(address) + +def _obscureEmailAddress(address): + """ + Makes some effort to obscure an email address while keeping it readable. + + Arguments: + address - actual email address + """ + + address = _obscureChar(address, '@', (_randomCase("at"), )) + address = _obscureChar(address, '.', (_randomCase("dot"), )) + return address + +def _randomCase(word): + """ + Provides a word back with the case of its letters randomized. + + Arguments: + word - word for which to randomize the case + """ + + result = [] + for letter in word: + result.append(random.choice((letter.lower(), letter.upper()))) + + return "".join(result) + +def _obscureChar(inputText, target, options): + """ + Obscures the given character from the input, replacing it with something + from a set of options and bracketing the selection. + + Arguments: + inputText - text to be obscured + target - character to be replaced + options - replacement options for the character + """ + + leftSpace = random.randint(0, 3) + leftFill = random.choice((' ', '_', '-', '=', '<')) + + rightSpace = random.randint(0, 3) + rightFill = random.choice((' ', '_', '-', '=', '>')) + + bracketLeft, bracketRight = random.choice(BRACKETS) + optSelection = random.choice(options) + replacement = "".join((bracketLeft, leftFill * leftSpace, optSelection, rightFill * rightSpace, bracketRight)) + + return inputText.replace(target, replacement) + def _toggleEnabledAction(toggleOptions, option, value): """ Enables or disables custom exit policy options based on our selection.