Module: Msf::Simple::Buffer

Defined in:
lib/msf/base/simple/buffer.rb

Overview

Wraps interaction with a generated buffer from the framework. Its primary use is to transform a raw buffer into another format.

Defined Under Namespace

Classes: BufferFormatError

Class Method Summary collapse

Class Method Details

.comment(buf, fmt = "ruby") ⇒ Object

Creates a comment using the supplied format. The formats supported are raw, ruby, python, perl, bash, js_be, js_le, c, and java.


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# File 'lib/msf/base/simple/buffer.rb', line 76

def self.comment(buf, fmt = "ruby")
  case fmt
    when 'raw'
    when 'num', 'dword', 'dw', 'hex'
      buf = Rex::Text.to_js_comment(buf)
    when 'ruby', 'rb', 'python', 'py'
      buf = Rex::Text.to_ruby_comment(buf)
    when 'perl', 'pl'
      buf = Rex::Text.to_perl_comment(buf)
    when 'bash', 'sh'
      buf = Rex::Text.to_bash_comment(buf)
    when 'c'
      buf = Rex::Text.to_c_comment(buf)
    when 'csharp'
      buf = Rex::Text.to_c_comment(buf)
    when 'js_be', 'js_le'
      buf = Rex::Text.to_js_comment(buf)
    when 'java'
      buf = Rex::Text.to_c_comment(buf)
    when 'powershell','ps1'
      buf = Rex::Text.to_psh_comment(buf)
    else
      raise BufferFormatError, "Unsupported buffer format: #{fmt}", caller
  end

  return buf
end

.encryption_formatsObject


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# File 'lib/msf/base/simple/buffer.rb', line 136

def self.encryption_formats
  [
    'xor',
    'base64',
    'aes256',
    'rc4'
  ]
end

.transform(buf, fmt = "ruby", var_name = 'buf', encryption_opts = {}) ⇒ Object

Serializes a buffer to a provided format. The formats supported are raw, num, dword, ruby, python, perl, bash, c, js_be, js_le, java and psh


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# File 'lib/msf/base/simple/buffer.rb', line 22

def self.transform(buf, fmt = "ruby", var_name = 'buf', encryption_opts={})
  default_wrap = 60

  unless encryption_opts.empty?
    buf = encrypt_buffer(buf, encryption_opts)
  end

  case fmt
    when 'raw'
    when 'num'
      buf = Rex::Text.to_num(buf)
    when 'hex'
      buf = Rex::Text.to_hex(buf, '')
    when 'dword', 'dw'
      buf = Rex::Text.to_dword(buf)
    when 'python', 'py'
      buf = Rex::Text.to_python(buf, default_wrap, var_name)
    when 'ruby', 'rb'
      buf = Rex::Text.to_ruby(buf, default_wrap, var_name)
    when 'perl', 'pl'
      buf = Rex::Text.to_perl(buf, default_wrap, var_name)
    when 'bash', 'sh'
      buf = Rex::Text.to_bash(buf, default_wrap, var_name)
    when 'c'
      buf = Rex::Text.to_c(buf, default_wrap, var_name)
    when 'csharp'
      buf = Rex::Text.to_csharp(buf, default_wrap, var_name)
    when 'js_be'
      buf = Rex::Text.to_unescape(buf, ENDIAN_BIG)
    when 'js_le'
      buf = Rex::Text.to_unescape(buf, ENDIAN_LITTLE)
    when 'java'
      buf = Rex::Text.to_java(buf, var_name)
    when 'powershell', 'ps1'
      buf = Rex::Powershell.to_powershell(buf, var_name)
    when 'vbscript'
      buf = Rex::Text.to_vbscript(buf, var_name)
    when 'vbapplication'
      buf = Rex::Text.to_vbapplication(buf, var_name)
    when 'base32'
      buf = Rex::Text.encode_base32(buf)
    when 'base64'
      buf = Rex::Text.encode_base64(buf)
    else
      raise BufferFormatError, "Unsupported buffer format: #{fmt}", caller
  end

  return buf
end

.transform_formatsObject

Returns the list of supported formats


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# File 'lib/msf/base/simple/buffer.rb', line 107

def self.transform_formats
  [
    'base32',
    'base64',
    'bash',
    'c',
    'csharp',
    'dw',
    'dword',
    'hex',
    'java',
    'js_be',
    'js_le',
    'num',
    'perl',
    'pl',
    'powershell',
    'ps1',
    'py',
    'python',
    'raw',
    'rb',
    'ruby',
    'sh',
    'vbapplication',
    'vbscript'
  ]
end