decal / percent_encode

Subvert detection by IDS/IPS rule sets when conducting web application and MiTB attacks, etc.

percent_encode

• Source
• Issues
• Documentation
• [Email](mailto:decal at ethernet.org)

Description

A collection of methods (constructive and destructive) for performing Percent encoding computations. Refer to this site for generic info about Unicode The Unicode Consirtium See this page for specific datum on utilizing Unicode style percent encoding URL Percent Encoding and Unicode This text file explains the byte and nibble based encoding styles used by this gem IDS/IPS Evasion for URI's

Features

• Adds customized percent encoding {String#urlencode!}.
  • First nibble encoding, i.e. '/index%%341.html'
  • Second nibble encoding, i.e. '/index%4%31.html'
  • Double nibble encoding, i.e. '/index%%34%31.html'
  • Double percent encoding, i.e. '/index%2541.html'
• Adds convenience methods:
  • {String#char_encode}
  • {String#percent_encode}
  • {String#percent_encode!}
  • {String#percent_decode}
  • {String#percent_decode!}
  • {String#urlencode}
  • {String#urlencode1}
  • {String#urlencode2}
  • {String#urlencode3}
  • {String#urlencode1!}
  • {String#urlencode2!}
  • {String#urlencode3!}

Examples

• Requiring the percent_encode RubyGem:

  require 'percent_encode' # => true

• One round of single percent encoding:

  'https://host.dom'.urlencode!( { :nibble => :single, :count => 1} ) # => "%68%74%74%70%73%3A%2F%2F%68%6F%73%74%2E%64%6F%6D"

• One round of first nibble encoding:

  'https://host.dom'.urlencode!( { :nibble => :first, :count => 1} ) # => "%%368%%374%%374%%370%%373%%331%%326%%326%%368%%366%%373%%374%%325%%364%%366%%364"

• One round of second nibble encoding:

  'https://host.dom'.urlencode!( { :nibble => :second, :count => 1} ) # => "%%3%38%%3%34%%3%34%%3%30%%3%33%%3%41%%3%46%%3%46%%3%38%%3%46%%3%33%%3%34%%3%45%%3%34%%3%46%%3%44"

• One round of double nibble encoding:

  'https://host.dom'.urlencode!( { :nibble => :double, :count => 1} ) # => "%25%36%38%25%37%34%25%37%34%25%37%30%25%37%33%25%33%41%25%32%46%25%32%46%25%36%38%25%36%46%25%37%33%25%37%34%25%32%45%25%36%34%25%36%46%25%36%44"

• One round of triple percent encoding:

  'https://host.dom'.urlencode!( { :nibble => :triple, :count => 1 } ) # => "%25%32%35%25%33%36%25%33%38%25%32%35%25%33%37%25%33%34%25%32%35%25%33%37%25%33%34%25%32%35%25%33%37%25%33%30%25%32%35%25%33%37%25%33%33%25%32%35%25%33%33%25%34%31%25%32%35%25%33%32%25%34%36%25%32%35%25%33%32%25%34%36%25%32%35%25%33%36%25%33%38%25%32%35%25%33%36%25%34%36%25%32%35%25%33%37%25%33%33%25%32%35%25%33%37%25%33%34%25%32%35%25%33%32%25%34%35%25%32%35%25%33%36%25%33%34%25%32%35%25%33%36%25%34%36%25%32%35%25%33%36%25%34%34"

• Two rounds of Unicode encoding:

  'https://host.dom'.urlencode!( { :nibble => :unicode, :count => 1 } ) => "%%U0036%U003%%U0037%U003%%U0037%U003%%U0037%U003%%U0037%U003%%U0033%U004%%U0032%U004%%U0032%U004%%U0036%U003%%U0036%U004%%U0037%U003%%U0037%U003%%U0032%U004%%U0036%U003%%U0036%U004%%U0036%U004"

Requirements

• Ruby >= 2.2.2

Install

• decal's GitHub: percent_encode

  $ git clone https://github.com/decal/percent_encode.git

Notices

Copyright (c) 2015 by Derek Callaway

See file:LICENSE.txt for license information View file:TODO.md for project "to-do" intentions/inspirations Read file:ChangeLog.md for code repository's official change log

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