(Go) Generate a Random 256-bit AES Key and RSA Encrypt

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Generates a random 256-bit AES key and encrypts using an RSA public key. Only the owner of the RSA private key will be able to decrypt the AES key.

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    // The RSA public key is used for encryption, and the private key for decryption.

    // The public key's role is to make encryption accessible to anyone while ensuring that
    // only the private key holder can decrypt the messages.
    // The public key is designed to be widely distributed so anyone can use it to encrypt messages
    // intended for the owner of the private key.

    // Load our 2048-bit RSA public key.
    pubKey := chilkat.NewPublicKey()
    // In all Chilkat methods expecting a path, you pass either absolute or relative paths.
    success := pubKey.LoadFromFile("rsaKeys/Test2048Rsa.pem")
    if success == false {
        fmt.Println(pubKey.LastErrorText())
        pubKey.DisposePublicKey()
        return
    }

    rsa := chilkat.NewRsa()

    // Tell RSA to use the public key.
    rsa.ImportPublicKeyObj(pubKey)

    // Generate a random 256-bit AES key (32 bytes)
    bdAesKey := chilkat.NewBinData()
    prng := chilkat.NewPrng()
    prng.GenRandomBd(32,bdAesKey)

    // RSA encrypt.
    rsa.EncryptBd(bdAesKey,false)

    // Save the RSA encrypted AES key to a file.
    success = bdAesKey.WriteFile("rsaEncrypted/myAes.key")

    pubKey.DisposePublicKey()
    rsa.DisposeRsa()
    bdAesKey.DisposeBinData()
    prng.DisposePrng()