29 lines
815 B
Ruby
29 lines
815 B
Ruby
# frozen_string_literal: true
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require_relative 'actionhash/version'
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# main module
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module ActionHash
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class Error < StandardError; end
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# Create a new Action Hash
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def self.create(prev_hash, input_data, key)
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data = [prev_hash, input_data].join(',')
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encrypted_data = xor_encrypt(data, key)
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encrypted_data.unpack1('H*') # Convert to hex
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end
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# Decrypt an Action Hash to its components
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def self.down_layer(hash, key)
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hex_decoded = [hash].pack('H*') # Convert from hex
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decrypted_data = xor_encrypt(hex_decoded, key)
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prev_hash, input_data = decrypted_data.split(',')
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{ prev_hash: prev_hash.to_i, input_data: input_data.to_i }
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end
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# XOR encrypt/decrypt (symmetric)
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def self.xor_encrypt(data, key)
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data.bytes.zip(key.bytes.cycle).map { |a, b| (a ^ b).chr }.join
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end
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end
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