Class: Duse::Client::SecretMarshaller

Inherits:
Object
  • Object
show all
Defined in:
lib/duse/client/secret.rb

Instance Method Summary collapse

Constructor Details

#initialize(secret, private_key) ⇒ SecretMarshaller

Returns a new instance of SecretMarshaller.



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# File 'lib/duse/client/secret.rb', line 8

def initialize(secret, private_key)
  @secret       = secret
  @private_key  = private_key
end

Instance Method Details

#parts_from_secret ⇒ Object 



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# File 'lib/duse/client/secret.rb', line 20

def parts_from_secret
  # sliced of 18 is a result of trial & error, if it's too large then
  # encryption will fail. Might improve with: http://stackoverflow.com/questions/11505547/how-calculate-size-of-rsa-cipher-text-using-key-size-clear-text-length
  secret_text_in_slices_of(18).map do |secret_part|
    shares = SecretSharing.split_secret(secret_part, 2, @secret.users.length)
    @secret.users.each_with_index.map do |user, index|
      share = shares[index]
      content, signature = Duse::Encryption.encrypt(@private_key, user.public_key, share)
      {"user_id" => user.id, "content" => content, "signature" => signature}
    end
  end
end

#secret_text_in_slices_of(piece_size) ⇒ Object 



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# File 'lib/duse/client/secret.rb', line 33

def secret_text_in_slices_of(piece_size)
  encoded_secret = Encryption.encode(@secret.secret_text)
  encoded_secret.chars.each_slice(piece_size).map(&:join)
end

#to_h ⇒ Object 



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# File 'lib/duse/client/secret.rb', line 13

def to_h
  secret_hash = {}
  secret_hash['title'] = @secret.title     if @secret.title
  secret_hash['parts'] = parts_from_secret if @secret.secret_text
  secret_hash
end