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54 lines
944 B
54 lines
944 B
#!/usr/bin/ruby
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require_relative "rsa"
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Primes = File.read("smallprimes.txt").chomp.split(",").map do |pstr|
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pstr.to_i
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end
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def get_random_primes
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puts "Fetching random primes..."
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p1, p2 = Primes.sample, Primes.sample
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return p1, p2
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end
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def choose_primes
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print "1st prime: "
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p1 = gets.chomp.to_i
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print "2nd prime: "
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p2 = gets.chomp.to_i
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return p1, p2
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end
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puts "[1] Random primes"
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puts "[2] Choose primes"
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ch = gets.chomp.to_i
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case ch
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when 1
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p1, p2 = get_random_primes
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when 2
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p1, p2 = choose_primes
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else
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p1, p2 = get_random_primes
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end
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puts "p1=#{p1}, p2=#{p2}"
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puts
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key = RSA::Key.new(p1, p2)
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print "Message to be encrypted: "
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msg = gets.chomp
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data = RSA::Data.new(msg)
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puts
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data.encrypt!(key)
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puts "Encrypted bytes (hex): #{data.raw}"
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puts "Encrypted bytes (dec): #{data.to_si}"
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puts
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data.decrypt!(key)
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puts "Decrypted bytes (hex): #{data.raw}"
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puts "Decrypted bytes (dec): #{data.to_si}"
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puts "Decrypted msg: #{data.to_s}"
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