Шифрование с парой ключей RSA (Ruby)
key.rb
Code (ruby)
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require ‘openssl’
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module Crypto
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def self.create_keys(priv = "rsa_key", pub = "#{priv}.pub", bits = 1024)
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private_key = OpenSSL::PKey::RSA.new(bits)
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File.open(priv, "w+") { |fp| fp << private_key.to_s }
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File.open(pub, "w+") { |fp| fp << private_key.public_key.to_s }
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private_key
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end
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class Key
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def initialize(data)
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@public = (data =~ /^—–BEGIN (RSA|DSA) PRIVATE KEY—–$/).nil?
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@key = OpenSSL::PKey::RSA.new(data)
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end
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def self.from_file(filename)
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self.new File.read( filename )
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end
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def encrypt(text)
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Base64.encode64(@key.send("#{key_type}_encrypt", text))
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end
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def decrypt(text)
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@key.send("#{key_type}_decrypt", Base64.decode64(text))
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end
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def private? !@public end
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def public? @public end
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def key_type
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@public ? :public : :private
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end
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end
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end
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использование
Code (ruby)
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require ‘key’
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Crypto.create_keys # creates rsa_key and rsa_key.pub
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priv_key = Crypto::Key.from_file(‘rsa_key’)
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pub_key = Crypto::Key.from_file(‘rsa_key.pub‘)
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text = "I was encrypted but came back!"
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secret = pub_key.encrypt(text)
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puts priv_key.decrypt(secret) #=>
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"I was encrypted but came back!"
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