29 lines
945 B
Ruby
29 lines
945 B
Ruby
# Creates asymetric key pairs for cryptographically secure operations.
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# Mostly used for creation of jwt.pem- which is used to verify authenticity of
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# JSON Web Tokens
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class KeyGen
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SAVE_PATH = "jwt.#{Rails.env}.pem"
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def self.try_file(path = SAVE_PATH)
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OpenSSL::PKey::RSA.new(File.read(path)) if File.file?(path)
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end
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def self.generate_new_key(path = SAVE_PATH)
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rsa = OpenSSL::PKey::RSA.generate(2048)
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File.open(path, 'w') { |f| f.write(rsa.to_pem) }
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return rsa
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end
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# Heroku / 12Factor users can't store stuff on the file system.
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# Store your pem file in ENV['RSA_KEY'] if that applies to you.
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def self.try_env
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OpenSSL::PKey::RSA.new(ENV['RSA_KEY']) if ENV['RSA_KEY']
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end
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# Lazy loads a crypto key. Will look in ENV['RSA_KEY'], then
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# jwt.environment_name.pem. Generates new key if neither is available.
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def self.current
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@current ||= ( try_env || try_file || generate_new_key)
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end
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end
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