jvazquez-r7
152 lines
4.1 KiB
Ruby
152 lines
4.1 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 field description representation (fieldDesc). It's used for
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# both primitive descriptions (primitiveDesc) and object descriptions (objectDesc).
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class Field < Element
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include Rex::Java::Serialization
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# @!attribute type
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# @return [String] The type of the field.
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attr_accessor :type
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# @!attribute name
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# @return [Java::Serialization::Model::Utf] The name of the field.
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attr_accessor :name
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# @!attribute field_type
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# @return [Java::Serialization::Model::Utf] The type of the field on object types.
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attr_accessor :field_type
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def initialize
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self.type = ''
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self.name = nil
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self.field_type = nil
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end
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# Deserializes a Java::Serialization::Model::Field
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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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# @faise [RuntimeError] if deserialization doesn't succeed
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def decode(io)
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code = io.read(1)
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unless code && is_valid?(code)
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raise ::RuntimeError, 'Failed to unserialize Field'
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end
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self.type = TYPE_CODES[code]
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self.name = Utf.decode(io)
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if is_object?
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self.field_type = decode_field_type(io)
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end
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self
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end
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# Serializes the Java::Serialization::Model::Field
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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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unless name.class == Java::Serialization::Model::Utf
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raise ::RuntimeError, 'Failed to serialize Field'
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end
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unless is_type_valid?
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raise ::RuntimeError, 'Failed to serialize Field'
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end
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encoded = ''
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encoded << TYPE_CODES.key(type)
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encoded << name.encode
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if is_object?
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encoded << encode_field_type
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end
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encoded
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end
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# Whether the field type is valid.
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#
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# @return [Boolean]
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def is_type_valid?
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if TYPE_CODES.values.include?(type)
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return true
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end
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false
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end
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# Whether the field type is a primitive one.
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#
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# @return [Boolean]
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def is_primitive?
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if PRIMITIVE_TYPE_CODES.values.include?(type)
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return true
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end
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false
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end
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# Whether the field type is an object one.
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#
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# @return [Boolean]
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def is_object?
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if OBJECT_TYPE_CODES.values.include?(type)
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return true
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end
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false
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end
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private
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# Whether the type opcode is a valid one.
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#
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# @param code [String] A type opcode
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# @return [Boolean]
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def is_valid?(code)
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if TYPE_CODES.keys.include?(code)
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return true
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end
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false
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end
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# Serializes the `field_type` attribute.
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#
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# @return [String]
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def encode_field_type
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unless field_type.class == Java::Serialization::Model::Utf
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raise ::RuntimeError, 'Failed to serialize Field'
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end
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encoded = [TC_STRING].pack('C')
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encoded << field_type.encode
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encoded
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end
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# Deserializes the `field_type` value.
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#
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# @param io [IO] the io to read from
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# @return [Java::Serialization::Model::Utf]
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# @raise [RuntimeError] if unserialization doesn't succeed
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def decode_field_type(io)
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opcode = io.read(1)
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unless opcode && opcode == [TC_STRING].pack('C')
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raise ::RuntimeError, 'Failed to unserialize Field'
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end
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type = Utf.decode(io)
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type
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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 |