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aes_file_storage.rb

require 'openssl'

# Method to encrypt a file using AES
def encrypt_file_aes(path)
  # Generate a random key and initialization vector (IV)
  key = OpenSSL::Random.random_bytes(32)
  iv = OpenSSL::Random.random_bytes(16)

  # Read the file content
  file_content = File.read(path)

  # Create an AES cipher with the key and IV
  cipher = OpenSSL::Cipher.new('AES-256-CBC')
  cipher.encrypt
  cipher.key = key
  cipher.iv = iv

  # Encrypt the file content
  encrypted = cipher.update(file_content) + cipher.final

  # Write the encrypted content to a new file
  File.write("#{path}.enc", encrypted)

  # Return the key and IV
  [key, iv]
end

# Method to decrypt a file using AES
def decrypt_file_aes(path, key, iv)
  # Read the encrypted content from the file
  encrypted = File.read(path)

  # Create an AES cipher with the key and IV
  cipher = OpenSSL::Cipher.new('AES-256-CBC')
  cipher.decrypt
  cipher.key = key
  cipher.iv = iv

  # Decrypt the content
  decrypted = cipher.update(encrypted) + cipher.final

  # Write the decrypted content to a new file
  File.write("#{path}.dec", decrypted)
end