公開鍵を用いた暗号化、秘密鍵を用いた復号化テスト用rubyスクリプト

rsa_key_test.rb

require 'openssl'                                                                                                                                                                                                     
require 'base64'

# openssl genrsa -out ./id_rsa で作成
private_key = nil 
File.open("id_rsa") do |f| 
  private_key = OpenSSL::PKey::RSA.new(f)
end

# openssl rsa -in id_rsa -pubout -out id_rsa_pub で作成
public_key = nil 
File.open("id_rsa_pub") do |f| 
  public_key = OpenSSL::PKey::RSA.new(f)
end

str = "aaabbbcccdddeeefffhogeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeee"
encrypted_str = Base64.encode64(public_key.public_encrypt(str)).gsub("\n", "") 
puts encrypted_str
p private_key.private_decrypt(Base64.decode64(encrypted_str))