Class: Rex::ElfScan::Scanner::RegexScanner

Inherits:
JmpRegScanner show all
Defined in:
lib/rex/elfscan/scanner.rb

Instance Attribute Summary

Attributes inherited from Generic

#elf, #regex

Instance Method Summary collapse

Methods inherited from JmpRegScanner

#_build_byte_list, #_parse_ret, #_ret_size

Methods inherited from Generic

#initialize, #scan

Constructor Details

This class inherits a constructor from Rex::ElfScan::Scanner::Generic

Instance Method Details

#config(param) ⇒ Object 



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# File 'lib/rex/elfscan/scanner.rb', line 193

def config(param)
  self.regex = Regexp.new(param['args'], nil, 'n')
end

#scan_segment(program_header, param = {}) ⇒ Object 



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# File 'lib/rex/elfscan/scanner.rb', line 197

def scan_segment(program_header, param={})
  offset = program_header.p_offset

  hits = []

  while offset < program_header.p_offset + program_header.p_filesz &&
  (offset = elf.index(regex, offset)) != nil

    idx = offset
    buf = ''
    mat = nil

    while (! (mat = buf.match(regex)))
      buf << elf.read(idx, 1)
      idx += 1
    end

    rva = elf.offset_to_rva(offset)

    hits << [ rva, buf.unpack("H*") ]
    offset += buf.length
  end

  return hits
end