instructions.txt

Here's the public key given to me: `MIIBIjANBgkqhkiG9w0BAQEFAAOCAQ8AMIIBCgKCAQEAl2uzoWA2iEGfeqDYO4XA0mQV8odb6qgdLT0T/k1PsbviMMt+SlAnZpwDkPlFySxNejOv8zAUHwDTWV7NGpYA0y+TrrBLkGGl9uUrzOjQLryJmFWsXxBGFd4emYXYBzROaH+r7pzhK7mIWLw1e2Cj5RL9Ac6wKA56axqCr2UZRNDBcS5A+nKTQTWy5eTrq6EQSBA6Hr81UWtYwlNSo1YbZ9JSNdD75Go7Du/zv1iPI+wWr7tMp0AJVBmieeB0kryXl+8zhli80wa72hDtyTkmfkBJAid5Il1biTrOXtMDaqXdfi9s4xzFp/ilP17KnA+VeAH2eLcqaC6LkEp/A1LApwIDAQAB`

I build a file with an extension of `.pem`, consisting of the public key in the following format:

    -----BEGIN PUBLIC KEY-----
    ...
    -----END PUBLIC KEY-----

After that,

    require 'openssl'
    require 'base64'
    
    pubblic_key = OpenSSL::PKey::RSA.new(File.read(/path/to/.pem/file))

    cipher_text = public_key.public_encrypt('n2yTcM0+ho4cnNPggQpoABi8wUbGteJIE/gfl1A/6Fo=\n')

    encrypted_text = Base64.encode64(cipher_text)

Running the above code gave me:

    FC/5xtnSnYSsOUP5fVNGLAK0JaJ3rVcc3WtZfhlyRdsbugbSs815FGHm3KN6\nPk+AuwWNngitm9UDzW5J1H2VwPGZ4vnK5d7q1Ue+O5U8P9uTMZ6Ect0/nL8z\ngAPRMfUMQY/Y9sBznx+x8u5kxOm4TADsXrHCp0Ny/X+0+fXQnTn2LWaDRiy/\nw7QwJDndYqQhjJhPEb4B6Jr6+OkoZ2A0MKtA06KTQQP7QAlQYNQXXVqP8B0v\nOfm6+rZIao1jaKrmAkid6PGdxqQqUliUmLB3nx4NjzWH3+sHGSJgypCFkfPh\n6a5sYb/Cu+7hDcKwYtzBl5wSuILdRHchZgtvdDN3dg==\n