Ruby中的简单加密,没有外部宝石

require 'openssl'

def encrypt(plaintext, key)
  cipher = OpenSSL::Cipher.new('AES-256-CBC')
  cipher.encrypt
  cipher.key = key
  iv = cipher.random_iv
  encrypted = cipher.update(plaintext) + cipher.final
  return encrypted, iv
end

def decrypt(encrypted, key, iv)
  decipher = OpenSSL::Cipher.new('AES-256-CBC')
  decipher.decrypt
  decipher.key = key
  decipher.iv = iv
  decrypted = decipher.update(encrypted) + decipher.final
  return decrypted
end

plaintext = "Hello, World!"
key = "ThisIsASecretKey"

encrypted_text, iv = encrypt(plaintext, key)
puts "Encrypted Text: #{encrypted_text}"
puts "Initialization Vector (IV): #{iv}"

decrypted_text = decrypt(encrypted_text, key, iv)
puts "Decrypted Text: #{decrypted_text}"