New upstream version 1.29.90 upstream/1.29.90

1 files changed, 450 insertions, 0 deletions

diff --git a/src/core/nm-audit-manager.c b/src/core/nm-audit-manager.c
new file mode 100644
index 00000000..8f419472
--- /dev/null
+++ b/src/core/nm-audit-manager.c
@@ -0,0 +1,450 @@
+/* SPDX-License-Identifier: GPL-2.0-or-later */
+/*
+ * Copyright (C) 2015 Red Hat, Inc.
+ */
+
+#include "src/core/nm-default-daemon.h"
+
+#include "nm-audit-manager.h"
+
+#if HAVE_LIBAUDIT
+    #include <libaudit.h>
+#endif
+
+#include "nm-libnm-core-intern/nm-auth-subject.h"
+#include "nm-config.h"
+#include "nm-dbus-manager.h"
+#include "settings/nm-settings-connection.h"
+
+/*****************************************************************************/
+
+typedef enum {
+    BACKEND_LOG    = (1 << 0),
+    BACKEND_AUDITD = (1 << 1),
+    _BACKEND_LAST,
+    BACKEND_ALL = ((_BACKEND_LAST - 1) << 1) - 1,
+} AuditBackend;
+
+typedef struct {
+    const char * name;
+    GValue       value;
+    gboolean     need_encoding;
+    AuditBackend backends;
+} AuditField;
+
+/*****************************************************************************/
+
+typedef struct {
+    NMConfig *config;
+    int       auditd_fd;
+} NMAuditManagerPrivate;
+
+struct _NMAuditManager {
+    GObject parent;
+#if HAVE_LIBAUDIT
+    NMAuditManagerPrivate _priv;
+#endif
+};
+
+struct _NMAuditManagerClass {
+    GObjectClass parent;
+};
+
+G_DEFINE_TYPE(NMAuditManager, nm_audit_manager, G_TYPE_OBJECT)
+
+#define NM_AUDIT_MANAGER_GET_PRIVATE(self) \
+    _NM_GET_PRIVATE(self, NMAuditManager, NM_IS_AUDIT_MANAGER)
+
+/*****************************************************************************/
+
+#define AUDIT_LOG_LEVEL LOGL_INFO
+
+#define _NMLOG_PREFIX_NAME "audit"
+#define _NMLOG(level, domain, ...)                                         \
+    G_STMT_START                                                           \
+    {                                                                      \
+        nm_log((level),                                                    \
+               (domain),                                                   \
+               NULL,                                                       \
+               NULL,                                                       \
+               "%s" _NM_UTILS_MACRO_FIRST(__VA_ARGS__),                    \
+               _NMLOG_PREFIX_NAME ": " _NM_UTILS_MACRO_REST(__VA_ARGS__)); \
+    }                                                                      \
+    G_STMT_END
+
+/*****************************************************************************/
+
+NM_DEFINE_SINGLETON_GETTER(NMAuditManager, nm_audit_manager_get, NM_TYPE_AUDIT_MANAGER);
+
+/*****************************************************************************/
+
+static void
+_audit_field_init_string(AuditField * field,
+                         const char * name,
+                         const char * str,
+                         gboolean     need_encoding,
+                         AuditBackend backends)
+{
+    field->name          = name;
+    field->need_encoding = need_encoding;
+    field->backends      = backends;
+    g_value_init(&field->value, G_TYPE_STRING);
+    g_value_set_static_string(&field->value, str);
+}
+
+static void
+_audit_field_init_uint(AuditField *field, const char *name, uint val, AuditBackend backends)
+{
+    field->name     = name;
+    field->backends = backends;
+    g_value_init(&field->value, G_TYPE_UINT);
+    g_value_set_uint(&field->value, val);
+}
+
+static char *
+build_message(GPtrArray *fields, AuditBackend backend)
+{
+    GString *   string;
+    AuditField *field;
+    gboolean    first = TRUE;
+    guint       i;
+
+    string = g_string_new(NULL);
+
+    for (i = 0; i < fields->len; i++) {
+        field = fields->pdata[i];
+
+        if (!NM_FLAGS_ANY(field->backends, backend))
+            continue;
+
+        if (first)
+            first = FALSE;
+        else
+            g_string_append_c(string, ' ');
+
+        if (G_VALUE_HOLDS_STRING(&field->value)) {
+            const char *str = g_value_get_string(&field->value);
+
+#if HAVE_LIBAUDIT
+            if (backend == BACKEND_AUDITD) {
+                if (field->need_encoding) {
+                    char *value;
+
+                    value = audit_encode_nv_string(field->name, str, 0);
+                    g_string_append(string, value);
+                    g_free(value);
+                } else
+                    g_string_append_printf(string, "%s=%s", field->name, str);
+                continue;
+            }
+#endif /* HAVE_LIBAUDIT */
+            g_string_append_printf(string, "%s=\"%s\"", field->name, str);
+        } else if (G_VALUE_HOLDS_UINT(&field->value)) {
+            g_string_append_printf(string, "%s=%u", field->name, g_value_get_uint(&field->value));
+        } else
+            g_assert_not_reached();
+    }
+    return g_string_free(string, FALSE);
+}
+
+static void
+nm_audit_log(NMAuditManager *self,
+             GPtrArray *     fields,
+             const char *    file,
+             guint           line,
+             const char *    func,
+             gboolean        success)
+{
+#if HAVE_LIBAUDIT
+    NMAuditManagerPrivate *priv;
+#endif
+    char *msg;
+
+    g_return_if_fail(NM_IS_AUDIT_MANAGER(self));
+
+#if HAVE_LIBAUDIT
+    priv = NM_AUDIT_MANAGER_GET_PRIVATE(self);
+
+    if (priv->auditd_fd >= 0) {
+        msg = build_message(fields, BACKEND_AUDITD);
+        audit_log_user_message(priv->auditd_fd, AUDIT_USYS_CONFIG, msg, NULL, NULL, NULL, success);
+        g_free(msg);
+    }
+#endif
+
+    if (nm_logging_enabled(AUDIT_LOG_LEVEL, LOGD_AUDIT)) {
+        msg = build_message(fields, BACKEND_LOG);
+        _NMLOG(AUDIT_LOG_LEVEL, LOGD_AUDIT, "%s", msg);
+        g_free(msg);
+    }
+}
+
+static void
+_audit_log_helper(NMAuditManager *self,
+                  GPtrArray *     fields,
+                  const char *    file,
+                  guint           line,
+                  const char *    func,
+                  const char *    op,
+                  gboolean        result,
+                  gpointer        subject_context,
+                  const char *    reason)
+{
+    AuditField      op_field = {}, pid_field = {}, uid_field = {};
+    AuditField      result_field = {}, reason_field = {};
+    gulong          pid, uid;
+    NMAuthSubject * subject                     = NULL;
+    gs_unref_object NMAuthSubject *subject_free = NULL;
+
+    _audit_field_init_string(&op_field, "op", op, FALSE, BACKEND_ALL);
+    g_ptr_array_insert(fields, 0, &op_field);
+
+    if (subject_context) {
+        if (NM_IS_AUTH_SUBJECT(subject_context))
+            subject = subject_context;
+        else if (G_IS_DBUS_METHOD_INVOCATION(subject_context)) {
+            GDBusMethodInvocation *context = subject_context;
+
+            subject = subject_free = nm_dbus_manager_new_auth_subject_from_context(context);
+        } else
+            g_warn_if_reached();
+    }
+    if (subject && nm_auth_subject_get_subject_type(subject) == NM_AUTH_SUBJECT_TYPE_UNIX_PROCESS) {
+        pid = nm_auth_subject_get_unix_process_pid(subject);
+        uid = nm_auth_subject_get_unix_process_uid(subject);
+        if (pid != G_MAXULONG) {
+            _audit_field_init_uint(&pid_field, "pid", pid, BACKEND_ALL);
+            g_ptr_array_add(fields, &pid_field);
+        }
+        if (uid != G_MAXULONG) {
+            _audit_field_init_uint(&uid_field, "uid", uid, BACKEND_ALL);
+            g_ptr_array_add(fields, &uid_field);
+        }
+    }
+
+    _audit_field_init_string(&result_field,
+                             "result",
+                             result ? "success" : "fail",
+                             FALSE,
+                             BACKEND_ALL);
+    g_ptr_array_add(fields, &result_field);
+
+    if (reason) {
+        _audit_field_init_string(&reason_field, "reason", reason, FALSE, BACKEND_LOG);
+        g_ptr_array_add(fields, &reason_field);
+    }
+
+    nm_audit_log(self, fields, file, line, func, result);
+}
+
+gboolean
+nm_audit_manager_audit_enabled(NMAuditManager *self)
+{
+#if HAVE_LIBAUDIT
+    NMAuditManagerPrivate *priv = NM_AUDIT_MANAGER_GET_PRIVATE(self);
+
+    if (priv->auditd_fd >= 0)
+        return TRUE;
+#endif
+
+    return nm_logging_enabled(AUDIT_LOG_LEVEL, LOGD_AUDIT);
+}
+
+void
+_nm_audit_manager_log_connection_op(NMAuditManager *      self,
+                                    const char *          file,
+                                    guint                 line,
+                                    const char *          func,
+                                    const char *          op,
+                                    NMSettingsConnection *connection,
+                                    gboolean              result,
+                                    const char *          args,
+                                    gpointer              subject_context,
+                                    const char *          reason)
+{
+    gs_unref_ptrarray GPtrArray *fields     = NULL;
+    AuditField                   uuid_field = {}, name_field = {}, args_field = {};
+
+    g_return_if_fail(op);
+
+    fields = g_ptr_array_new();
+
+    if (connection) {
+        _audit_field_init_string(&uuid_field,
+                                 "uuid",
+                                 nm_settings_connection_get_uuid(connection),
+                                 FALSE,
+                                 BACKEND_ALL);
+        g_ptr_array_add(fields, &uuid_field);
+
+        _audit_field_init_string(&name_field,
+                                 "name",
+                                 nm_settings_connection_get_id(connection),
+                                 TRUE,
+                                 BACKEND_ALL);
+        g_ptr_array_add(fields, &name_field);
+    }
+
+    if (args) {
+        _audit_field_init_string(&args_field, "args", args, FALSE, BACKEND_ALL);
+        g_ptr_array_add(fields, &args_field);
+    }
+
+    _audit_log_helper(self, fields, file, line, func, op, result, subject_context, reason);
+}
+
+void
+_nm_audit_manager_log_generic_op(NMAuditManager *self,
+                                 const char *    file,
+                                 guint           line,
+                                 const char *    func,
+                                 const char *    op,
+                                 const char *    arg,
+                                 gboolean        result,
+                                 gpointer        subject_context,
+                                 const char *    reason)
+{
+    gs_unref_ptrarray GPtrArray *fields    = NULL;
+    AuditField                   arg_field = {};
+
+    g_return_if_fail(op);
+    g_return_if_fail(arg);
+
+    fields = g_ptr_array_new();
+
+    _audit_field_init_string(&arg_field, "arg", arg, TRUE, BACKEND_ALL);
+    g_ptr_array_add(fields, &arg_field);
+
+    _audit_log_helper(self, fields, file, line, func, op, result, subject_context, reason);
+}
+
+void
+_nm_audit_manager_log_device_op(NMAuditManager *self,
+                                const char *    file,
+                                guint           line,
+                                const char *    func,
+                                const char *    op,
+                                NMDevice *      device,
+                                gboolean        result,
+                                const char *    args,
+                                gpointer        subject_context,
+                                const char *    reason)
+{
+    gs_unref_ptrarray GPtrArray *fields          = NULL;
+    AuditField                   interface_field = {}, ifindex_field = {}, args_field = {};
+    int                          ifindex;
+
+    g_return_if_fail(op);
+    g_return_if_fail(device);
+
+    fields = g_ptr_array_new();
+
+    _audit_field_init_string(&interface_field,
+                             "interface",
+                             nm_device_get_ip_iface(device),
+                             TRUE,
+                             BACKEND_ALL);
+    g_ptr_array_add(fields, &interface_field);
+
+    ifindex = nm_device_get_ip_ifindex(device);
+    if (ifindex > 0) {
+        _audit_field_init_uint(&ifindex_field, "ifindex", ifindex, BACKEND_ALL);
+        g_ptr_array_add(fields, &ifindex_field);
+    }
+
+    if (args) {
+        _audit_field_init_string(&args_field, "args", args, FALSE, BACKEND_ALL);
+        g_ptr_array_add(fields, &args_field);
+    }
+
+    _audit_log_helper(self, fields, file, line, func, op, result, subject_context, reason);
+}
+
+#if HAVE_LIBAUDIT
+static void
+init_auditd(NMAuditManager *self)
+{
+    NMAuditManagerPrivate *priv = NM_AUDIT_MANAGER_GET_PRIVATE(self);
+    NMConfigData *         data = nm_config_get_data(priv->config);
+    int                    errsv;
+
+    if (nm_config_data_get_value_boolean(data,
+                                         NM_CONFIG_KEYFILE_GROUP_LOGGING,
+                                         NM_CONFIG_KEYFILE_KEY_LOGGING_AUDIT,
+                                         NM_CONFIG_DEFAULT_LOGGING_AUDIT_BOOL)) {
+        if (priv->auditd_fd < 0) {
+            priv->auditd_fd = audit_open();
+            if (priv->auditd_fd < 0) {
+                errsv = errno;
+                _LOGE(LOGD_CORE, "failed to open auditd socket: %s", nm_strerror_native(errsv));
+            } else
+                _LOGD(LOGD_CORE, "socket created");
+        }
+    } else {
+        if (priv->auditd_fd >= 0) {
+            audit_close(priv->auditd_fd);
+            priv->auditd_fd = -1;
+            _LOGD(LOGD_CORE, "socket closed");
+        }
+    }
+}
+
+static void
+config_changed_cb(NMConfig *          config,
+                  NMConfigData *      config_data,
+                  NMConfigChangeFlags changes,
+                  NMConfigData *      old_data,
+                  NMAuditManager *    self)
+{
+    if (NM_FLAGS_HAS(changes, NM_CONFIG_CHANGE_VALUES))
+        init_auditd(self);
+}
+#endif
+
+/*****************************************************************************/
+
+static void
+nm_audit_manager_init(NMAuditManager *self)
+{
+#if HAVE_LIBAUDIT
+    NMAuditManagerPrivate *priv = NM_AUDIT_MANAGER_GET_PRIVATE(self);
+
+    priv->config = g_object_ref(nm_config_get());
+    g_signal_connect(G_OBJECT(priv->config),
+                     NM_CONFIG_SIGNAL_CONFIG_CHANGED,
+                     G_CALLBACK(config_changed_cb),
+                     self);
+    priv->auditd_fd = -1;
+
+    init_auditd(self);
+#endif
+}
+
+static void
+dispose(GObject *object)
+{
+#if HAVE_LIBAUDIT
+    NMAuditManager *       self = NM_AUDIT_MANAGER(object);
+    NMAuditManagerPrivate *priv = NM_AUDIT_MANAGER_GET_PRIVATE(self);
+
+    if (priv->config) {
+        g_signal_handlers_disconnect_by_func(priv->config, config_changed_cb, self);
+        g_clear_object(&priv->config);
+    }
+
+    if (priv->auditd_fd >= 0) {
+        audit_close(priv->auditd_fd);
+        priv->auditd_fd = -1;
+    }
+#endif
+
+    G_OBJECT_CLASS(nm_audit_manager_parent_class)->dispose(object);
+}
+
+static void
+nm_audit_manager_class_init(NMAuditManagerClass *klass)
+{
+    GObjectClass *object_class = G_OBJECT_CLASS(klass);
+
+    object_class->dispose = dispose;
+}