/* * QEMU PAM authorization driver * * Copyright (c) 2018 Red Hat, Inc. * * This library is free software; you can redistribute it and/or * modify it under the terms of the GNU Lesser General Public * License as published by the Free Software Foundation; either * version 2 of the License, or (at your option) any later version. * * This library is distributed in the hope that it will be useful, * but WITHOUT ANY WARRANTY; without even the implied warranty of * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU * Lesser General Public License for more details. * * You should have received a copy of the GNU Lesser General Public * License along with this library; if not, see <http://www.gnu.org/licenses/>. * */ #include "qemu/osdep.h" #include "authz/pamacct.h" #include "trace.h" #include "qom/object_interfaces.h" #include <security/pam_appl.h> static bool qauthz_pam_is_allowed(QAuthZ *authz, const char *identity, Error **errp) { QAuthZPAM *pauthz = QAUTHZ_PAM(authz); const struct pam_conv pam_conversation = { 0 }; pam_handle_t *pamh = NULL; int ret; trace_qauthz_pam_check(authz, identity, pauthz->service); ret = pam_start(pauthz->service, identity, &pam_conversation, &pamh); if (ret != PAM_SUCCESS) { error_setg(errp, "Unable to start PAM transaction: %s", pam_strerror(NULL, ret)); return false; } ret = pam_acct_mgmt(pamh, PAM_SILENT); pam_end(pamh, ret); if (ret != PAM_SUCCESS) { error_setg(errp, "Unable to authorize user '%s': %s", identity, pam_strerror(pamh, ret)); return false; } return true; } static void qauthz_pam_prop_set_service(Object *obj, const char *service, Error **errp G_GNUC_UNUSED) { QAuthZPAM *pauthz = QAUTHZ_PAM(obj); g_free(pauthz->service); pauthz->service = g_strdup(service); } static char * qauthz_pam_prop_get_service(Object *obj, Error **errp G_GNUC_UNUSED) { QAuthZPAM *pauthz = QAUTHZ_PAM(obj); return g_strdup(pauthz->service); } static void qauthz_pam_complete(UserCreatable *uc, Error **errp) { } static void qauthz_pam_finalize(Object *obj) { QAuthZPAM *pauthz = QAUTHZ_PAM(obj); g_free(pauthz->service); } static void qauthz_pam_class_init(ObjectClass *oc, void *data) { UserCreatableClass *ucc = USER_CREATABLE_CLASS(oc); QAuthZClass *authz = QAUTHZ_CLASS(oc); ucc->complete = qauthz_pam_complete; authz->is_allowed = qauthz_pam_is_allowed; object_class_property_add_str(oc, "service", qauthz_pam_prop_get_service, qauthz_pam_prop_set_service, NULL); } QAuthZPAM *qauthz_pam_new(const char *id, const char *service, Error **errp) { return QAUTHZ_PAM( object_new_with_props(TYPE_QAUTHZ_PAM, object_get_objects_root(), id, errp, "service", service, NULL)); } static const TypeInfo qauthz_pam_info = { .parent = TYPE_QAUTHZ, .name = TYPE_QAUTHZ_PAM, .instance_size = sizeof(QAuthZPAM), .instance_finalize = qauthz_pam_finalize, .class_size = sizeof(QAuthZPAMClass), .class_init = qauthz_pam_class_init, .interfaces = (InterfaceInfo[]) { { TYPE_USER_CREATABLE }, { } } }; static void qauthz_pam_register_types(void) { type_register_static(&qauthz_pam_info); } type_init(qauthz_pam_register_types);