76 lines
1.2 KiB
Ruby
76 lines
1.2 KiB
Ruby
##
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# $Id$
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##
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module Msf
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###
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#
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# This module provides some functions for dealing with MCI RIFF data
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#
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###
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module Exploit::RIFF
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#
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# Builds a RIFF chunk with a specified tag and data
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#
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def riff_chunk(tag, data)
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len = data.length
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padding = len % 2 # RIFF chunks must be 2 byte aligned
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return tag + [len].pack('V') + data + ("\x00" * padding)
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end
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#
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# Builds a RIFF list chunk (one containing other chunks)
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#
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def riff_list_chunk(tag, type, data)
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len = data.length + 4
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padding = len % 2
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return tag + [len].pack('V') + type + data
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end
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#
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# Generates a random number of random RIFF chunks, up to 4352 bytes
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#
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def random_riff_chunks(count = rand(16) + 17)
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chunks = ''
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0.upto(count) do
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chunks << random_riff_chunk()
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end
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return chunks
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end
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#
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# Generates a random RIFF chunk, up to 136 bytes
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#
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def random_riff_chunk(len = rand(128) + 1)
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riff_chunk(random_riff_tag, rand_text(len))
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end
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#
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# Generates a random RIFF tag, making sure that it's not one of the
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# tags processed by LoadAniIcon or LoadCursorIconFromFileMap
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#
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def random_riff_tag
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valid = ['RIFF', 'ACON', 'anih', 'LIST', 'fram', 'icon', 'rate']
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tag = nil
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begin
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tag = rand_text_alpha(4)
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end while valid.include? tag
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return tag
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end
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end
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end
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