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##
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# This module requires Metasploit: https://metasploit.com/download
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# Current source: https://github.com/rapid7/metasploit-framework
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##
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class MetasploitModule < Msf::Encoder
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  # This may produce incorrect code due to minimal escaping
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  Rank = LowRanking
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  def initialize
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    super(
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      'Name'        => 'Bash Brace Expansion Command Encoder',
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      'Description' => %q{
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        This encoder uses brace expansion in Bash and other shells
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        to avoid whitespace without being overly fancy.
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      },
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      'Author'      => ['wvu', 'egypt'],
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      'Platform'    => %w[ linux unix ],
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      'Arch'        => ARCH_CMD,
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      'EncoderType' => Msf::Encoder::Type::CmdPosixBrace
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    )
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  end
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  def encode_block(state, buf)
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    # Skip encoding if there are no badchars
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    return buf if state.badchars !~ /\s/
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    # Perform brace expansion encoding
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    "{#{buf.gsub(/([{,}])/, '\\\\\1').gsub(/\s+/, ',')}}"
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  end
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end
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