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module Trunk
class CompositeSerializer
def initialize(serializers = [])
@serializers = serializers
end
def add(serializer)
@serializers.push(serializer)
end
def serialize(value)
@serializers.each do |x|
value = x.serialize(value)
end
value
end
def deserialize(value)
puts "deserialize"
@serializers.reverse.each do |x|
puts x.class
value = x.deserialize(value)
end
value
end
end
class Base64Serializer
def serialize(value)
Base64.strict_encode64(value)
end
def deserialize(value)
Base64.decode64(value)
end
end
class SymmetricCrypto
attr_reader :private_key, :algorithm
def initialize(private_key, algorithm: 'AES-256-CBC')
@private_key = private_key
@algorithm = algorithm
end
def serialize(plain_text)
cipher = OpenSSL::Cipher.new(algorithm)
cipher.encrypt
cipher.key = private_key
cipher.random_iv + cipher.update(plain_text) + cipher.final
end
def deserialize(cipher_text)
cipher = OpenSSL::Cipher.new(algorithm)
cipher.decrypt
iv = cipher_text[0..cipher.iv_len - 1]
data = cipher_text[cipher.iv_len..-1]
cipher.key = private_key
cipher.iv = iv
cipher.update(data) + cipher.final
end
end
class Storage
def initialize(hash, serializer)
@hash = hash
@serializer = serializer
end
def fetch(key)
value = @hash[key]
return if value.nil?
@serializer.deserialize(value)
end
def store(key, value)
@hash[key] = @serializer.serialize(value)
end
end
end
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