Make TLS version number available in STATUS command

This adds a new STATUS command field "eap_tls_version" that shows the
TLS version number that was used during EAP-TLS/TTLS/PEAP/FAST exchange.
For now, this is only supported with OpenSSL.

Signed-off-by: Jouni Malinen <j@w1.fi>

src/crypto/tls_openssl.c

@@ -3097,6 +3097,22 @@ int tls_connection_set_cipher_list(void *tls_ctx, struct tls_connection *conn,
 }
 
 
+int tls_get_version(void *ssl_ctx, struct tls_connection *conn,
+		    char *buf, size_t buflen)
+{
+	const char *name;
+	if (conn == NULL || conn->ssl == NULL)
+		return -1;
+
+	name = SSL_get_version(conn->ssl);
+	if (name == NULL)
+		return -1;
+
+	os_strlcpy(buf, name, buflen);
+	return 0;
+}
+
+
 int tls_get_cipher(void *ssl_ctx, struct tls_connection *conn,
 		   char *buf, size_t buflen)
 {