#define TLS_PROTO_TLS1_1	0x08
#define TLS_PROTO_TLS1_2	0x10
#define TLS_PROTO_TLS1_3	0x20
#define ENABLED(flag, mask)	(((flag) & (mask)) == (mask))

#define SSLKEYLOGFILE		"SSLKEYLOGFILE"

/*
 * Static data structures
 */

#ifndef OPENSSL_NO_DH
#include "dh_params.h"
#endif

/*
 * Thread-Safe TLS Code
 */

#ifdef TCL_THREADS
#define OPENSSL_THREAD_DEFINES
#include <openssl/opensslconf.h>

	    BIO_free(bio);
	    Tcl_DStringFree(&ds);
	    if (!dh) {
		Tcl_AppendResult(interp, "Could not read DH parameters from file", (char *) NULL);
		SSL_CTX_free(ctx);
		return NULL;
	    }
	    SSL_CTX_set_tmp_dh(ctx, dh);
	    DH_free(dh);

	} else {
	    /* Use well known DH parameters that have built-in support in OpenSSL */
	    dh = get_dhParams();
	}
	    if (!SSL_CTX_set_dh_auto(ctx, 1)) {
		Tcl_AppendResult(interp, "Could not enable set DH auto: ", REASON(), (char *) NULL);
		SSL_CTX_free(ctx);
		return NULL;
	    }
	SSL_CTX_set_tmp_dh(ctx, dh);
	DH_free(dh);
	}
    }
#endif

    /* set our certificate */
    load_private_key = 0;
    if (certfile != NULL) {
	load_private_key = 1;