66 lines
1.5 KiB
Ruby
66 lines
1.5 KiB
Ruby
require 'msf/core'
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require 'rex/encoder/alpha2/unicode_upper'
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module Msf
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module Encoders
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module X86
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class UnicodeUpper < Msf::Encoder::Alphanum
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Rank = LowRanking
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def initialize
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super(
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'Name' => "Alpha2 Alphanumeric Unicode Uppercase Encoder",
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'Version' => '$Revision$',
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'Description' => %q{
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Encodes payloas as unicode-safe uppercase text. This encoder uses
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SkyLined's Alpha2 encoding suite.
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},
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'Author' => [ 'pusscat', 'skylined' ],
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'Arch' => ARCH_X86,
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'License' => GPL_LICENSE,
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'EncoderType' => Msf::Encoder::Type::AlphanumUnicodeUpper,
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'Decoder' =>
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{
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'BlockSize' => 1,
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})
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end
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#
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# Returns the decoder stub that is adjusted for the size of the buffer
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# being encoded.
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#
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def decoder_stub(state)
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reg = datastore['BufferRegister'] || 'EAX'
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offset = datastore['BufferOffset'].to_i || 0
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Rex::Encoder::Alpha2::UnicodeUpper::gen_decoder(reg, offset)
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end
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#
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# Encodes a one byte block with the current index of the length of the
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# payload.
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#
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def encode_block(state, block)
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Rex::Encoder::Alpha2::UnicodeUpper::encode_byte(block.unpack('C')[0], datastore['BadChars'])
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end
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#
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# Tack on our terminator
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#
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def encode_end(state)
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state.encoded += Rex::Encoder::Alpha2::UnicodeUpper::add_terminator()
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end
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#
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# Returns the unicode version of the supplied buffer.
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#
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def to_native(buffer)
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Rex::Text.to_unicode(buffer)
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end
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end
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end end end
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