jvazquez-r7
92 lines
2.7 KiB
Ruby
92 lines
2.7 KiB
Ruby
module Rex
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module Java
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module Serialization
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module Model
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# This class provides a Java Stream representation
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class Stream < Element
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include Rex::Java::Serialization::Model::Contents
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# @!attribute magic
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# @return [Fixnum] The stream signature
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attr_accessor :magic
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# @!attribute version
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# @return [Fixnum] The stream version
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attr_accessor :version
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# @!attribute contents
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# @return [Array] The stream's contents
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attr_accessor :contents
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def initialize(stream = nil)
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super(stream)
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self.magic = STREAM_MAGIC
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self.version = STREAM_VERSION
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self.contents = []
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end
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# Deserializes a Java::Serialization::Model::Stream
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#
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# @param io [IO] the io to read from
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# @return [self] if deserialization succeeds
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# @raise [RuntimeError] if deserialization doesn't succeed
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def decode(io)
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self.magic = decode_magic(io)
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self.version = decode_version(io)
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until io.eof?
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content = decode_content(io)
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self.contents << content
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end
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self
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end
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# Serializes the Java::Serialization::Model::Stream
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#
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# @return [String] if serialization succeeds
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# @raise [RuntimeError] if serialization doesn't succeed
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def encode
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encoded = ''
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encoded << [magic].pack('n')
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encoded << [version].pack('n')
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contents.each do |content|
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encoded << encode_content(content)
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end
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encoded
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end
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private
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# Deserializes the magic stream value
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#
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# @param io [IO] the io to read from
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# @return [String] if deserialization succeeds
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# @raise [RuntimeError] if deserialization doesn't succeed
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def decode_magic(io)
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magic = io.read(2)
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unless magic && magic.length == 2 && magic.unpack('n')[0] == STREAM_MAGIC
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raise ::RuntimeError, 'Failed to unserialize Stream'
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end
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STREAM_MAGIC
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end
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# Deserializes the version stream
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#
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# @param io [IO] the io to read from
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# @return [Fixnum] if deserialization succeeds
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# @raise [RuntimeError] if deserialization doesn't succeed
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def decode_version(io)
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version = io.read(2)
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unless version && version.unpack('n')[0] == STREAM_VERSION
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raise ::RuntimeError, 'Failed to unserialize Stream'
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end
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STREAM_VERSION
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end
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end
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end
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end
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end
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end |