764 lines
19 KiB
Ruby
764 lines
19 KiB
Ruby
require 'base64'
|
|
require 'md5'
|
|
require 'stringio'
|
|
|
|
begin
|
|
require 'zlib'
|
|
rescue LoadError
|
|
end
|
|
|
|
module Rex
|
|
|
|
###
|
|
#
|
|
# This class formats text in various fashions and also provides
|
|
# a mechanism for wrapping text at a given column.
|
|
#
|
|
###
|
|
module Text
|
|
|
|
##
|
|
#
|
|
# Constants
|
|
#
|
|
##
|
|
|
|
States = ["AK", "AL", "AR", "AZ", "CA", "CO", "CT", "DE", "FL", "GA", "HI",
|
|
"IA", "ID", "IL", "IN", "KS", "KY", "LA", "MA", "MD", "ME", "MI", "MN",
|
|
"MO", "MS", "MT", "NC", "ND", "NE", "NH", "NJ", "NM", "NV", "NY", "OH",
|
|
"OK", "OR", "PA", "RI", "SC", "SD", "TN", "TX", "UT", "VA", "VT", "WA",
|
|
"WI", "WV", "WY"]
|
|
UpperAlpha = "ABCDEFGHIJKLMNOPQRSTUVWXYZ"
|
|
LowerAlpha = "abcdefghijklmnopqrstuvwxyz"
|
|
Numerals = "0123456789"
|
|
Alpha = UpperAlpha + LowerAlpha
|
|
AlphaNumeric = Alpha + Numerals
|
|
HighAscii = (0x80 .. 0xff).map { |b| [b].pack('C') }.to_s
|
|
DefaultWrap = 60
|
|
AllChars =
|
|
"\xff\x00\x01\x02\x03\x04\x05\x06\x07\x08\x09\x0a\x0b\x0c" +
|
|
"\x0d\x0e\x0f\x10\x11\x12\x13\x14\x15\x16\x17\x18\x19\x1a" +
|
|
"\x1b\x1c\x1d\x1e\x1f\x20\x21\x22\x23\x24\x25\x26\x27\x28" +
|
|
"\x29\x2a\x2b\x2c\x2d\x2e\x2f\x30\x31\x32\x33\x34\x35\x36" +
|
|
"\x37\x38\x39\x3a\x3b\x3c\x3d\x3e\x3f\x40\x41\x42\x43\x44" +
|
|
"\x45\x46\x47\x48\x49\x4a\x4b\x4c\x4d\x4e\x4f\x50\x51\x52" +
|
|
"\x53\x54\x55\x56\x57\x58\x59\x5a\x5b\x5c\x5d\x5e\x5f\x60" +
|
|
"\x61\x62\x63\x64\x65\x66\x67\x68\x69\x6a\x6b\x6c\x6d\x6e" +
|
|
"\x6f\x70\x71\x72\x73\x74\x75\x76\x77\x78\x79\x7a\x7b\x7c" +
|
|
"\x7d\x7e\x7f\x80\x81\x82\x83\x84\x85\x86\x87\x88\x89\x8a" +
|
|
"\x8b\x8c\x8d\x8e\x8f\x90\x91\x92\x93\x94\x95\x96\x97\x98" +
|
|
"\x99\x9a\x9b\x9c\x9d\x9e\x9f\xa0\xa1\xa2\xa3\xa4\xa5\xa6" +
|
|
"\xa7\xa8\xa9\xaa\xab\xac\xad\xae\xaf\xb0\xb1\xb2\xb3\xb4" +
|
|
"\xb5\xb6\xb7\xb8\xb9\xba\xbb\xbc\xbd\xbe\xbf\xc0\xc1\xc2" +
|
|
"\xc3\xc4\xc5\xc6\xc7\xc8\xc9\xca\xcb\xcc\xcd\xce\xcf\xd0" +
|
|
"\xd1\xd2\xd3\xd4\xd5\xd6\xd7\xd8\xd9\xda\xdb\xdc\xdd\xde" +
|
|
"\xdf\xe0\xe1\xe2\xe3\xe4\xe5\xe6\xe7\xe8\xe9\xea\xeb\xec" +
|
|
"\xed\xee\xef\xf0\xf1\xf2\xf3\xf4\xf5\xf6\xf7\xf8\xf9\xfa" +
|
|
"\xfb\xfc\xfd\xfe"
|
|
|
|
DefaultPatternSets = [ Rex::Text::UpperAlpha, Rex::Text::LowerAlpha, Rex::Text::Numerals ]
|
|
|
|
##
|
|
#
|
|
# Serialization
|
|
#
|
|
##
|
|
|
|
#
|
|
# Converts a raw string into a ruby buffer
|
|
#
|
|
def self.to_ruby(str, wrap = DefaultWrap)
|
|
return hexify(str, wrap, '"', '" +', '', '"')
|
|
end
|
|
|
|
#
|
|
# Creates a ruby-style comment
|
|
#
|
|
def self.to_ruby_comment(str, wrap = DefaultWrap)
|
|
return wordwrap(str, 0, wrap, '', '# ')
|
|
end
|
|
|
|
#
|
|
# Converts a raw string into a C buffer
|
|
#
|
|
def self.to_c(str, wrap = DefaultWrap, name = "buf")
|
|
return hexify(str, wrap, '"', '"', "unsigned char #{name}[] = \n", '";')
|
|
end
|
|
|
|
#
|
|
# Creates a c-style comment
|
|
#
|
|
def self.to_c_comment(str, wrap = DefaultWrap)
|
|
return "/*\n" + wordwrap(str, 0, wrap, '', ' * ') + " */\n"
|
|
end
|
|
|
|
#
|
|
# Creates a javascript-style comment
|
|
#
|
|
def self.to_js_comment(str, wrap = DefaultWrap)
|
|
return wordwrap(str, 0, wrap, '', '// ')
|
|
end
|
|
|
|
#
|
|
# Converts a raw string into a perl buffer
|
|
#
|
|
def self.to_perl(str, wrap = DefaultWrap)
|
|
return hexify(str, wrap, '"', '" .', '', '";')
|
|
end
|
|
|
|
#
|
|
# Creates a perl-style comment
|
|
#
|
|
def self.to_perl_comment(str, wrap = DefaultWrap)
|
|
return wordwrap(str, 0, wrap, '', '# ')
|
|
end
|
|
|
|
#
|
|
# Returns the raw string
|
|
#
|
|
def self.to_raw(str)
|
|
return str
|
|
end
|
|
|
|
#
|
|
# Returns a unicode escaped string for Javascript
|
|
#
|
|
def self.to_unescape(data, endian=ENDIAN_LITTLE)
|
|
data << "\x41" if (data.length % 2 != 0)
|
|
dptr = 0
|
|
buff = ''
|
|
while (dptr < data.length)
|
|
c1 = data[dptr]
|
|
dptr += 1
|
|
c2 = data[dptr]
|
|
dptr += 1
|
|
|
|
if (endian == ENDIAN_LITTLE)
|
|
buff << sprintf('%%u%.2x%.2x', c2, c1)
|
|
else
|
|
buff << sprintf('%%u%.2x%.2x', c1, c2)
|
|
end
|
|
end
|
|
return buff
|
|
end
|
|
|
|
#
|
|
# Returns the hex version of the supplied string
|
|
#
|
|
def self.to_hex(str, prefix = "\\x", count = 1)
|
|
raise RuntimeError, "unable to chunk into #{count} byte chunks" if ((str.length % count) > 0)
|
|
|
|
# XXX: Regexp.new is used here since using /.{#{count}}/o would compile
|
|
# the regex the first time it is used and never check again. Since we
|
|
# want to know how many to capture on every instance, we do it this
|
|
# way.
|
|
return str.unpack('H*')[0].gsub(Regexp.new(".{#{count * 2}}")) { |s| prefix + s }
|
|
end
|
|
|
|
#
|
|
# Converts standard ASCII text to a unicode string.
|
|
#
|
|
# Supported unicode types include: utf-16le, utf16-be, utf32-le, utf32-be, utf-7, and utf-8
|
|
#
|
|
# Providing 'mode' provides hints to the actual encoder as to how it should encode the string. Only UTF-7 and UTF-8 use "mode".
|
|
#
|
|
# utf-7 by default does not encode alphanumeric and a few other characters. By specifying the mode of "all", then all of the characters are encoded, not just the non-alphanumeric set.
|
|
# to_unicode(str, 'utf-7', 'all')
|
|
#
|
|
# utf-8 specifies that alphanumeric characters are used directly, eg "a" is just "a". However, there exist 6 different overlong encodings of "a" that are technically not valid, but parse just fine in most utf-8 parsers. (0xC1A1, 0xE081A1, 0xF08081A1, 0xF8808081A1, 0xFC80808081A1, 0xFE8080808081A1). How many bytes to use for the overlong enocding is specified providing 'size'.
|
|
# to_unicode(str, 'utf-8', 'overlong', 2)
|
|
#
|
|
# Many utf-8 parsers also allow invalid overlong encodings, where bits that are unused when encoding a single byte are modified. Many parsers will ignore these bits, rendering simple string matching to be ineffective for dealing with UTF-8 strings. There are many more invalid overlong encodings possible for "a". For example, three encodings are available for an invalid 2 byte encoding of "a". (0xC1E1 0xC161 0xC121). By specifying "invalid", a random invalid encoding is chosen for the given byte size.
|
|
# to_unicode(str, 'utf-8', 'invalid', 2)
|
|
#
|
|
# utf-7 defaults to 'normal' utf-7 encoding
|
|
# utf-8 defaults to 2 byte 'normal' encoding
|
|
#
|
|
def self.to_unicode(str='', type = 'utf-16le', mode = '', size = '')
|
|
case type
|
|
when 'utf-16le'
|
|
return str.unpack('C*').pack('v*')
|
|
when 'utf-16be'
|
|
return str.unpack('C*').pack('n*')
|
|
when 'utf-32le'
|
|
return str.unpack('C*').pack('V*')
|
|
when 'utf-32be'
|
|
return str.unpack('C*').pack('N*')
|
|
when 'utf-7'
|
|
case mode
|
|
when 'all'
|
|
return str.gsub(/./){ |a|
|
|
out = ''
|
|
if 'a' != '+'
|
|
out = encode_base64(to_unicode(a, 'utf-16be')).gsub(/[=\r\n]/, '')
|
|
end
|
|
'+' + out + '-'
|
|
}
|
|
else
|
|
return str.gsub(/[^\n\r\t\ A-Za-z0-9\'\(\),-.\/\:\?]/){ |a|
|
|
out = ''
|
|
if a != '+'
|
|
out = encode_base64(to_unicode(a, 'utf-16be')).gsub(/[=\r\n]/, '')
|
|
end
|
|
'+' + out + '-'
|
|
}
|
|
end
|
|
when 'utf-8'
|
|
if size == ''
|
|
size = 2
|
|
end
|
|
|
|
if size >= 2 and size <= 7
|
|
string = ''
|
|
str.each_byte { |a|
|
|
if (a < 21 || a > 0x7f) || mode != ''
|
|
# ugh. turn a single byte into the binary representation of it, in array form
|
|
bin = [a].pack('C').unpack('B8')[0].split(//)
|
|
|
|
# even more ugh.
|
|
bin.collect!{|a| a = a.to_i}
|
|
|
|
out = Array.new(8 * size, 0)
|
|
|
|
0.upto(size - 1) { |i|
|
|
out[i] = 1
|
|
out[i * 8] = 1
|
|
}
|
|
|
|
i = 0
|
|
byte = 0
|
|
bin.reverse.each { |bit|
|
|
if i < 6
|
|
mod = (((size * 8) - 1) - byte * 8) - i
|
|
out[mod] = bit
|
|
else
|
|
byte = byte + 1
|
|
i = 0
|
|
redo
|
|
end
|
|
i = i + 1
|
|
}
|
|
|
|
if mode != ''
|
|
case mode
|
|
when 'overlong'
|
|
# do nothing, since we already handle this as above...
|
|
when 'invalid'
|
|
done = 0
|
|
while done == 0
|
|
# the ghetto...
|
|
bits = [7, 8, 15, 16, 23, 24, 31, 32, 41]
|
|
bits.each { |bit|
|
|
bit = (size * 8) - bit
|
|
if bit > 1
|
|
set = rand(2)
|
|
if out[bit] != set
|
|
out[bit] = set
|
|
done = 1
|
|
end
|
|
end
|
|
}
|
|
end
|
|
else
|
|
raise TypeError, 'Invalid mode. Only "overlong" and "invalid" are acceptable modes for utf-8'
|
|
end
|
|
end
|
|
string += [out.join('')].pack('B*')
|
|
else
|
|
string += [a].pack('C')
|
|
end
|
|
}
|
|
return string
|
|
else
|
|
raise TypeError, 'invalid utf-8 size'
|
|
end
|
|
when 'uhwtfms' # suggested name from HD :P
|
|
load_codepage()
|
|
|
|
string = ''
|
|
# overloading mode as codepage
|
|
if mode == ''
|
|
mode = 1252 # ANSI - Latan 1, default for US installs of MS products
|
|
else
|
|
mode = mode.to_i
|
|
end
|
|
if $codepage_map_cache[mode].nil?
|
|
raise TypeError, "Invalid codepage #{mode}"
|
|
end
|
|
str.each_byte {|byte|
|
|
char = [byte].pack('C*')
|
|
possible = $codepage_map_cache[mode]['data'][char]
|
|
if possible.nil?
|
|
raise TypeError, "codepage #{mode} does not provide an encoding for 0x#{char.unpack('H*')[0]}"
|
|
end
|
|
string += possible[ rand(possible.length) ]
|
|
}
|
|
return string
|
|
else
|
|
raise TypeError, 'invalid utf type'
|
|
end
|
|
end
|
|
|
|
#
|
|
# Encode a string in a manor useful for HTTP URIs and URI Parameters.
|
|
#
|
|
def self.uri_encode(str, mode = 'hex-normal')
|
|
return str if mode == 'none' # fast track no encoding
|
|
|
|
all = /[^\/\\]+/
|
|
normal = /[^a-zA-Z1-9]+/
|
|
|
|
case mode
|
|
when 'hex-normal'
|
|
return str.gsub(normal) { |s| Rex::Text.to_hex(s, '%') }
|
|
when 'hex-all'
|
|
return str.gsub(all) { |s| Rex::Text.to_hex(s, '%') }
|
|
when 'u-normal'
|
|
return str.gsub(normal) { |s| Rex::Text.to_hex(Rex::Text.to_unicode(s, 'uhwtfms'), '%u', 2) }
|
|
when 'u-all'
|
|
return str.gsub(all) { |s| Rex::Text.to_hex(Rex::Text.to_unicode(s, 'uhwtfms'), '%u', 2) }
|
|
else
|
|
raise TypeError, 'invalid mode'
|
|
end
|
|
end
|
|
|
|
# Encode a string in a manor useful for HTTP URIs and URI Parameters.
|
|
#
|
|
# a = "javascript".gsub(/./) {|i| "(" + [ Rex::Text.html_encode(i, 'hex'), Rex::Text.html_encode(i, 'int'), Rex::Text.html_encode(i, 'int-wide')].join('|') +')[\s\x00]*' }
|
|
def self.html_encode(str, mode = 'hex')
|
|
case mode
|
|
when 'hex'
|
|
return str.gsub(/./) { |s| Rex::Text.to_hex(s, '&#x') }
|
|
when 'int'
|
|
return str.unpack('C*').collect{ |i| "&#" + i.to_s }.join('')
|
|
when 'int-wide'
|
|
return str.unpack('C*').collect{ |i| "&#" + ("0" * (7 - i.to_s.length)) + i.to_s }.join('')
|
|
else
|
|
raise TypeError, 'invalid mode'
|
|
end
|
|
end
|
|
|
|
#
|
|
# Converts a hex string to a raw string
|
|
#
|
|
def self.hex_to_raw(str)
|
|
[ str.downcase.gsub(/'/,'').gsub(/\\?x([a-f0-9][a-f0-9])/, '\1') ].pack("H*")
|
|
end
|
|
|
|
#
|
|
# Wraps text at a given column using a supplied indention
|
|
#
|
|
def self.wordwrap(str, indent = 0, col = DefaultWrap, append = '', prepend = '')
|
|
return str.gsub(/.{1,#{col - indent}}(?:\s|\Z)/){
|
|
( (" " * indent) + prepend + $& + append + 5.chr).gsub(/\n\005/,"\n").gsub(/\005/,"\n")}
|
|
end
|
|
|
|
#
|
|
# Converts a string to a hex version with wrapping support
|
|
#
|
|
def self.hexify(str, col = DefaultWrap, line_start = '', line_end = '', buf_start = '', buf_end = '')
|
|
output = buf_start
|
|
cur = 0
|
|
count = 0
|
|
new_line = true
|
|
|
|
# Go through each byte in the string
|
|
str.each_byte { |byte|
|
|
count += 1
|
|
append = ''
|
|
|
|
# If this is a new line, prepend with the
|
|
# line start text
|
|
if (new_line == true)
|
|
append += line_start
|
|
new_line = false
|
|
end
|
|
|
|
# Append the hexified version of the byte
|
|
append += sprintf("\\x%.2x", byte)
|
|
cur += append.length
|
|
|
|
# If we're about to hit the column or have gone past it,
|
|
# time to finish up this line
|
|
if ((cur + line_end.length >= col) or
|
|
(cur + buf_end.length >= col))
|
|
new_line = true
|
|
cur = 0
|
|
|
|
# If this is the last byte, use the buf_end instead of
|
|
# line_end
|
|
if (count == str.length)
|
|
append += buf_end + "\n"
|
|
else
|
|
append += line_end + "\n"
|
|
end
|
|
end
|
|
|
|
output += append
|
|
}
|
|
|
|
# If we were in the middle of a line, finish the buffer at this point
|
|
if (new_line == false)
|
|
output += buf_end + "\n"
|
|
end
|
|
|
|
return output
|
|
end
|
|
|
|
##
|
|
#
|
|
# Transforms
|
|
#
|
|
##
|
|
|
|
#
|
|
# Base64 encoder
|
|
#
|
|
def self.encode_base64(str)
|
|
Base64.encode64(str).chomp
|
|
end
|
|
|
|
#
|
|
# Base64 decoder
|
|
#
|
|
def self.decode_base64(str)
|
|
Base64.decode64(str)
|
|
end
|
|
|
|
#
|
|
# Raw MD5 digest of the supplied string
|
|
#
|
|
def self.md5_raw(str)
|
|
MD5.digest(str)
|
|
end
|
|
|
|
#
|
|
# Hexidecimal MD5 digest of the supplied string
|
|
#
|
|
def self.md5(str)
|
|
MD5.hexdigest(str)
|
|
end
|
|
|
|
##
|
|
#
|
|
# Executable generators
|
|
#
|
|
##
|
|
|
|
def self.to_win32pe(code = "\xcc", note="")
|
|
pe = ''
|
|
|
|
fd = File.open(File.join(File.dirname(__FILE__), "..", "..", "data", "templates", "template.exe"), "rb")
|
|
pe = fd.read(fd.stat.size)
|
|
fd.close
|
|
|
|
bo = pe.index('PAYLOAD:')
|
|
co = pe.index('COMMENT:')
|
|
|
|
pe[bo, 8192] = [code].pack('a8192') if bo
|
|
pe[co, 512] = [note].pack('a512') if co
|
|
|
|
return pe
|
|
end
|
|
|
|
##
|
|
#
|
|
# Generators
|
|
#
|
|
##
|
|
|
|
# Generates a random character.
|
|
def self.rand_char(bad, chars = AllChars)
|
|
rand_text(1, bad, chars)
|
|
end
|
|
|
|
# Base text generator method
|
|
def self.rand_base(len, bad, *foo)
|
|
# Remove restricted characters
|
|
(bad || '').split('').each { |c| foo.delete(c) }
|
|
|
|
# Return nil if all bytes are restricted
|
|
return nil if foo.length == 0
|
|
|
|
buff = ""
|
|
|
|
# Generate a buffer from the remaining bytes
|
|
if foo.length >= 256
|
|
len.times { buff << Kernel.rand(256) }
|
|
else
|
|
len.times { buff += foo[ rand(foo.length) ] }
|
|
end
|
|
|
|
return buff
|
|
end
|
|
|
|
# Generate random bytes of data
|
|
def self.rand_text(len, bad='', chars = AllChars)
|
|
foo = chars.split('')
|
|
rand_base(len, bad, *foo)
|
|
end
|
|
|
|
# Generate random bytes of alpha data
|
|
def self.rand_text_alpha(len, bad='')
|
|
foo = []
|
|
foo += ('A' .. 'Z').to_a
|
|
foo += ('a' .. 'z').to_a
|
|
rand_base(len, bad, *foo )
|
|
end
|
|
|
|
# Generate random bytes of lowercase alpha data
|
|
def self.rand_text_alpha_lower(len, bad='')
|
|
rand_base(len, bad, *('a' .. 'z').to_a)
|
|
end
|
|
|
|
# Generate random bytes of uppercase alpha data
|
|
def self.rand_text_alpha_upper(len, bad='')
|
|
rand_base(len, bad, *('A' .. 'Z').to_a)
|
|
end
|
|
|
|
# Generate random bytes of alphanumeric data
|
|
def self.rand_text_alphanumeric(len, bad='')
|
|
foo = []
|
|
foo += ('A' .. 'Z').to_a
|
|
foo += ('a' .. 'z').to_a
|
|
foo += ('0' .. '9').to_a
|
|
rand_base(len, bad, *foo )
|
|
end
|
|
|
|
# Generate random bytes of english-like data
|
|
def self.rand_text_english(len, bad='')
|
|
foo = []
|
|
foo += (0x21 .. 0x7e).map{ |c| c.chr }
|
|
rand_base(len, bad, *foo )
|
|
end
|
|
|
|
#
|
|
# Creates a pattern that can be used for offset calculation purposes. This
|
|
# routine is capable of generating patterns using a supplied set and a
|
|
# supplied number of identifiable characters (slots). The supplied sets
|
|
# should not contain any duplicate characters or the logic will fail.
|
|
#
|
|
def self.pattern_create(length, sets = [ UpperAlpha, LowerAlpha, Numerals ])
|
|
buf = ''
|
|
idx = 0
|
|
offsets = []
|
|
|
|
sets.length.times { offsets << 0 }
|
|
|
|
until buf.length >= length
|
|
begin
|
|
buf += converge_sets(sets, 0, offsets, length)
|
|
rescue RuntimeError
|
|
break
|
|
end
|
|
end
|
|
|
|
buf[0..length]
|
|
end
|
|
|
|
#
|
|
# Calculate the offset to a pattern
|
|
#
|
|
def self.pattern_offset(pattern, value)
|
|
if (value.kind_of?(String))
|
|
pattern.index(value)
|
|
elsif (value.kind_of?(Fixnum) or value.kind_of?(Bignum))
|
|
pattern.index([ value ].pack('V'))
|
|
else
|
|
raise ArgumentError, "Invalid class for value: #{value.class}"
|
|
end
|
|
end
|
|
|
|
#
|
|
# Compresses a string, eliminating all superfluous whitespace before and
|
|
# after lines and eliminating all lines.
|
|
#
|
|
def self.compress(str)
|
|
str.gsub(/\n/m, ' ').gsub(/\s+/, ' ').gsub(/^\s+/, '').gsub(/\s+$/, '')
|
|
end
|
|
|
|
# Returns true if zlib can be used.
|
|
def self.zlib_present?
|
|
begin
|
|
temp = Zlib
|
|
return true
|
|
rescue
|
|
return false
|
|
end
|
|
end
|
|
|
|
# backwards compat for just a bit...
|
|
def self.gzip_present?
|
|
self.zlib_present?
|
|
end
|
|
|
|
#
|
|
# Compresses a string using zlib
|
|
#
|
|
def self.zlib_deflate(str)
|
|
raise RuntimeError, "Gzip support is not present." if (!zlib_present?)
|
|
return Zlib::Deflate.deflate(str)
|
|
end
|
|
|
|
#
|
|
# Uncompresses a string using zlib
|
|
#
|
|
def self.zlib_inflate(str)
|
|
raise RuntimeError, "Gzip support is not present." if (!zlib_present?)
|
|
return Zlib::Inflate.inflate(str)
|
|
end
|
|
|
|
#
|
|
# Compresses a string using gzip
|
|
#
|
|
def self.gzip(str, level = 9)
|
|
raise RuntimeError, "Gzip support is not present." if (!zlib_present?)
|
|
raise RuntimeError, "Invalid gzip compression level" if (level < 1 or level > 9)
|
|
|
|
s = ""
|
|
gz = Zlib::GzipWriter.new(StringIO.new(s), level)
|
|
gz << str
|
|
gz.close
|
|
return s
|
|
end
|
|
|
|
#
|
|
# Uncompresses a string using gzip
|
|
#
|
|
def self.ungzip(str)
|
|
raise RuntimeError, "Gzip support is not present." if (!zlib_present?)
|
|
|
|
s = ""
|
|
gz = Zlib::GzipReader.new(StringIO.new(str))
|
|
s << gz.read
|
|
gz.close
|
|
return s
|
|
end
|
|
|
|
#
|
|
# Return the index of the first badchar in data, otherwise return
|
|
# nil if there wasn't any badchar occurences.
|
|
#
|
|
def self.badchar_index(data, badchars = '')
|
|
badchars.each_byte { |badchar|
|
|
pos = data.index(badchar)
|
|
return pos if pos
|
|
}
|
|
return nil
|
|
end
|
|
|
|
#
|
|
# This method removes bad characters from a string.
|
|
#
|
|
def self.remove_badchars(data, badchars = '')
|
|
data.delete(badchars)
|
|
end
|
|
|
|
#
|
|
# This method returns all chars but the supplied set
|
|
#
|
|
def self.charset_exclude(keepers)
|
|
[*(0..255)].pack('C*').delete(keepers)
|
|
end
|
|
|
|
#
|
|
# Shuffles a byte stream
|
|
#
|
|
def self.shuffle_s(str)
|
|
shuffle_a(str.unpack("C*")).pack("C*")
|
|
end
|
|
|
|
#
|
|
# Performs a Fisher-Yates shuffle on an array
|
|
#
|
|
def self.shuffle_a(arr)
|
|
len = arr.length
|
|
max = len - 1
|
|
cyc = [* (0..max) ]
|
|
for d in cyc
|
|
e = rand(d+1)
|
|
next if e == d
|
|
f = arr[d];
|
|
g = arr[e];
|
|
arr[d] = g;
|
|
arr[e] = f;
|
|
end
|
|
return arr
|
|
end
|
|
|
|
# Generate a random hostname
|
|
def self.rand_hostname
|
|
host = []
|
|
(rand(5) + 1).times {
|
|
host.push(Rex::Text.rand_text_alphanumeric(rand(10) + 1))
|
|
}
|
|
d = ['com', 'net', 'org', 'gov']
|
|
host.push(d[rand(d.size)])
|
|
host.join('.').downcase
|
|
end
|
|
|
|
# Generate a state
|
|
def self.rand_state()
|
|
States[rand(States.size)]
|
|
end
|
|
|
|
protected
|
|
|
|
def self.converge_sets(sets, idx, offsets, length) # :nodoc:
|
|
buf = sets[idx][offsets[idx]].chr
|
|
|
|
# If there are more sets after use, converage with them.
|
|
if (sets[idx + 1])
|
|
buf += converge_sets(sets, idx + 1, offsets, length)
|
|
else
|
|
# Increment the current set offset as well as previous ones if we
|
|
# wrap back to zero.
|
|
while (idx >= 0 and ((offsets[idx] = (offsets[idx] + 1) % sets[idx].length)) == 0)
|
|
idx -= 1
|
|
end
|
|
|
|
# If we reached the point where the idx fell below zero, then that
|
|
# means we've reached the maximum threshold for permutations.
|
|
if (idx < 0)
|
|
raise RuntimeError, "Maximum permutations reached"
|
|
end
|
|
end
|
|
|
|
buf
|
|
end
|
|
|
|
def self.load_codepage()
|
|
return if (!$codepage_map_cache.nil?)
|
|
file = File.join(File.dirname(__FILE__),'codepage.map')
|
|
page = ''
|
|
name = ''
|
|
map = {}
|
|
File.open(file).each { |line|
|
|
next if line =~ /^#/
|
|
next if line =~ /^\s*$/
|
|
data = line.split
|
|
if data[1] =~ /^\(/
|
|
page = data.shift.to_i
|
|
name = data.join(' ').sub(/^\(/,'').sub(/\)$/,'')
|
|
map[page] = {}
|
|
map[page]['name'] = name
|
|
map[page]['data'] = {}
|
|
else
|
|
data.each { |entry|
|
|
wide, char = entry.split(':')
|
|
char = [char].pack('H*')
|
|
wide = [wide].pack('H*')
|
|
if map[page]['data'][char].nil?
|
|
map[page]['data'][char] = [wide]
|
|
else
|
|
map[page]['data'][char].push(wide)
|
|
end
|
|
}
|
|
end
|
|
}
|
|
$codepage_map_cache = map
|
|
end
|
|
|
|
end
|
|
end
|