On 17/10/17 21:27, Chris Bare wrote:
> I have the following code:
>
> setup_ssl (char *server_name, char *port, SSL_CTX *ctx)
> {
> BIO *output = BIO_new_ssl_connect (ctx);
> if (!output)
> {
> return (NULL);
> }
> BIO_get_ssl (output, &ssl);
> SSL_set_mode (ssl, SSL_MODE_AUTO_RETRY);
> SSL_set_verify (ssl, true, NULL);
> BIO_set_conn_hostname (output, server_name);
> BIO_set_conn_port(output, port);
>
> if (BIO_do_connect (output) <= 0)
> {
> BIO_free (output);
> return (NULL);
> }
> }
>
> If the server I'm trying to connect to does not have ssl enabled, I get
> the error:
> SSL23_GET_SERVER_HELLO:unknown protocol
> and BIO_do_connect fails as expected, but BIO_free gives this error:
> SSL_shutdown:shutdown while in init
Hmmm...that looks like an OpenSSL bug to me. It should not call
SSL_shutdown() if we are still in init. I raised this issue:
https://github.com/openssl/openssl/issues/4545
>
> If I don't free it, I have a memory leak.
> Is there something else I need to do to clean up the BIO?
As a workaround for this I think you can just ignore the error. From
code inspection it looks to me like it should go ahead and free
everything anyway.
Matt
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