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daemon: add tcp_min_ssf option
Add an option to allow the admin to requet a higher minimum SSF for connections than the built-in default. The current default is 56 (single DES equivalent, to support old kerberos) and will be raised to 112 in the future. https://bugzilla.redhat.com/show_bug.cgi?id=1431589 Signed-off-by: Ján Tomko <jtomko@redhat.com> Reviewed-by: Michal Privoznik <mprivozn@redhat.com>
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@ -43,6 +43,7 @@ module @DAEMON_NAME_UC@ =
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@CUT_ENABLE_IP@
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| str_entry "auth_tcp"
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| str_entry "auth_tls"
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| int_entry "tcp_min_ssf"
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let certificate_entry = str_entry "key_file"
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| str_entry "cert_file"
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@ -197,6 +197,14 @@
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# It is possible to make use of any SASL authentication
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# mechanism as well, by using 'sasl' for this option
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#auth_tls = "none"
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# Enforce a minimum SSF value for TCP sockets
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#
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# The default minimum is currently 56 (single-DES) which will
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# be raised to 112 in the future.
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#
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# This option can be used to set values higher than 112
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#tcp_min_ssf = 112
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@END@
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@ -210,6 +210,9 @@ daemonSetupNetworking(virNetServer *srv,
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int unix_sock_ro_mask = 0;
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int unix_sock_rw_mask = 0;
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int unix_sock_adm_mask = 0;
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#if WITH_SASL
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unsigned int tcp_min_ssf = 0;
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#endif /* !WITH_SASL */
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g_autoptr(virSystemdActivation) act = NULL;
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virSystemdActivationMap actmap[] = {
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{ .name = DAEMON_NAME ".socket", .family = AF_UNIX, .path = sock_path },
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@ -403,10 +406,13 @@ daemonSetupNetworking(virNetServer *srv,
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return -1;
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#if WITH_SASL
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# if WITH_IP
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tcp_min_ssf = config->tcp_min_ssf;
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# endif
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if (virNetServerNeedsAuth(srv, REMOTE_AUTH_SASL) &&
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!(saslCtxt = virNetSASLContextNewServer(
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(const char *const*)config->sasl_allowed_username_list,
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56)))
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tcp_min_ssf)))
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return -1;
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#endif
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@ -134,6 +134,10 @@ daemonConfigNew(bool privileged G_GNUC_UNUSED)
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data->auth_tls = REMOTE_AUTH_NONE;
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#endif /* ! WITH_IP */
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#if WITH_IP
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data->tcp_min_ssf = 56; /* good enough for kerberos */
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#endif
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data->min_workers = 5;
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data->max_workers = 20;
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data->max_clients = 5000;
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@ -298,6 +302,17 @@ daemonConfigLoadOptions(struct daemonConfig *data,
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if (virConfGetValueString(conf, "tls_priority", &data->tls_priority) < 0)
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return -1;
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if (virConfGetValueUInt(conf, "tcp_min_ssf", &data->tcp_min_ssf) < 0)
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return -1;
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if (data->tcp_min_ssf < SSF_WARNING_LEVEL) {
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virReportError(VIR_ERR_CONFIG_UNSUPPORTED,
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_("minimum SSF levels lower than %d are not supported"),
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SSF_WARNING_LEVEL);
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return -1;
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}
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#endif /* ! WITH_IP */
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if (virConfGetValueStringList(conf, "sasl_allowed_username_list", false,
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@ -56,6 +56,7 @@ struct daemonConfig {
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bool tls_no_sanity_certificate;
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char **tls_allowed_dn_list;
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char *tls_priority;
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unsigned int tcp_min_ssf;
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char *key_file;
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char *cert_file;
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@ -19,6 +19,7 @@ module Test_@DAEMON_NAME@ =
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@CUT_ENABLE_IP@
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{ "auth_tcp" = "sasl" }
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{ "auth_tls" = "none" }
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{ "tcp_min_ssf" = "112" }
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@END@
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{ "access_drivers"
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{ "1" = "polkit" }
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