/src/fwupd/libfwupdplugin/fu-efivars.c

Source
/*
 * Copyright 2018 Richard Hughes <richard@hughsie.com>
 * Copyright 2015 Peter Jones <pjones@redhat.com>
 *
 * SPDX-License-Identifier: LGPL-2.1-or-later
 */

#include "config.h"

#include "fwupd-error.h"

#include "fu-byte-array.h"
#include "fu-efi-device-path-list.h"
#include "fu-efi-file-path-device-path.h"
#include "fu-efi-hard-drive-device-path.h"
#include "fu-efivars-private.h"
#include "fu-mem.h"
#include "fu-pefile-firmware.h"

typedef struct {
  FuPathStore *pstore;
} FuEfivarsPrivate;

enum { PROP_0, PROP_PATH_STORE, PROP_LAST };

G_DEFINE_TYPE_WITH_PRIVATE(FuEfivars, fu_efivars, G_TYPE_OBJECT);

#define GET_PRIVATE(o) (fu_efivars_get_instance_private(o))

/**
 * fu_efivars_get_path_store:
 * @self: a #FuEfivars
 *
 * Gets the well-known path store.
 *
 * Returns: (transfer none): a #FuPathStore, or %NULL if not set
 *
 * Since: 2.1.1
 **/
FuPathStore *
fu_efivars_get_path_store(FuEfivars *self)
{
  FuEfivarsPrivate *priv = GET_PRIVATE(self);
  g_return_val_if_fail(FU_IS_EFIVARS(self), NULL);
  return priv->pstore;
}

/**
 * fu_efivars_supported:
 * @self: a #FuEfivars
 * @error: #GError
 *
 * Determines if the kernel supports EFI variables
 *
 * Returns: %TRUE on success
 *
 * Since: 2.0.0
 **/
gboolean
fu_efivars_supported(FuEfivars *self, GError **error)
{
  FuEfivarsClass *efivars_class = FU_EFIVARS_GET_CLASS(self);

  g_return_val_if_fail(FU_IS_EFIVARS(self), FALSE);
  g_return_val_if_fail(error == NULL || *error == NULL, FALSE);

  if (efivars_class->supported == NULL) {
    g_set_error_literal(error, FWUPD_ERROR, FWUPD_ERROR_NOT_SUPPORTED, "not supported");
    return FALSE;
  }
  return efivars_class->supported(self, error);
}

/**
 * fu_efivars_delete:
 * @self: a #FuEfivars
 * @guid: Globally unique identifier
 * @name: Variable name
 * @error: #GError
 *
 * Removes a variable from NVRAM, returning an error if it does not exist.
 *
 * Returns: %TRUE on success
 *
 * Since: 2.0.0
 **/
gboolean
fu_efivars_delete(FuEfivars *self, const gchar *guid, const gchar *name, GError **error)
{
  FuEfivarsClass *efivars_class = FU_EFIVARS_GET_CLASS(self);

  g_return_val_if_fail(FU_IS_EFIVARS(self), FALSE);
  g_return_val_if_fail(guid != NULL, FALSE);
  g_return_val_if_fail(name != NULL, FALSE);
  g_return_val_if_fail(error == NULL || *error == NULL, FALSE);

  if (efivars_class->delete == NULL) {
    g_set_error_literal(error, FWUPD_ERROR, FWUPD_ERROR_NOT_SUPPORTED, "not supported");
    return FALSE;
  }
  return efivars_class->delete(self, guid, name, error);
}

/**
 * fu_efivars_delete_with_glob:
 * @self: a #FuEfivars
 * @guid: Globally unique identifier
 * @name_glob: Variable name
 * @error: #GError
 *
 * Removes a group of variables from NVRAM
 *
 * Returns: %TRUE on success
 *
 * Since: 2.0.0
 **/
gboolean
fu_efivars_delete_with_glob(FuEfivars *self,
          const gchar *guid,
          const gchar *name_glob,
          GError **error)
{
  FuEfivarsClass *efivars_class = FU_EFIVARS_GET_CLASS(self);

  g_return_val_if_fail(FU_IS_EFIVARS(self), FALSE);
  g_return_val_if_fail(guid != NULL, FALSE);
  g_return_val_if_fail(name_glob != NULL, FALSE);
  g_return_val_if_fail(error == NULL || *error == NULL, FALSE);

  if (efivars_class->delete_with_glob == NULL) {
    g_set_error_literal(error, FWUPD_ERROR, FWUPD_ERROR_NOT_SUPPORTED, "not supported");
    return FALSE;
  }
  return efivars_class->delete_with_glob(self, guid, name_glob, error);
}

/**
 * fu_efivars_exists:
 * @self: a #FuEfivars
 * @guid: Globally unique identifier
 * @name: (not nullable): Variable name
 *
 * Test if a variable exists
 *
 * Returns: %TRUE on success
 *
 * Since: 2.0.0
 **/
gboolean
fu_efivars_exists(FuEfivars *self, const gchar *guid, const gchar *name)
{
  FuEfivarsClass *efivars_class = FU_EFIVARS_GET_CLASS(self);

  g_return_val_if_fail(FU_IS_EFIVARS(self), FALSE);
  g_return_val_if_fail(guid != NULL, FALSE);
  g_return_val_if_fail(name != NULL, FALSE);

  if (efivars_class->exists == NULL)
    return FALSE;
  return efivars_class->exists(self, guid, name);
}

/**
 * fu_efivars_get_data:
 * @self: a #FuEfivars
 * @guid: Globally unique identifier
 * @name: Variable name
 * @data: Data to set
 * @data_sz: size of data
 * @attr: (nullable) (out): #FuEfiVariableAttrs, e.g. %FU_EFI_VARIABLE_ATTR_NON_VOLATILE
 * @error: (nullable): optional return location for an error
 *
 * Gets the data from a UEFI variable in NVRAM
 *
 * Returns: %TRUE on success
 *
 * Since: 2.0.0
 **/
gboolean
fu_efivars_get_data(FuEfivars *self,
        const gchar *guid,
        const gchar *name,
        guint8 **data,
        gsize *data_sz,
        FuEfiVariableAttrs *attr,
        GError **error)
{
  FuEfivarsClass *efivars_class = FU_EFIVARS_GET_CLASS(self);

  g_return_val_if_fail(FU_IS_EFIVARS(self), FALSE);
  g_return_val_if_fail(guid != NULL, FALSE);
  g_return_val_if_fail(name != NULL, FALSE);
  g_return_val_if_fail(error == NULL || *error == NULL, FALSE);

  if (efivars_class->get_data == NULL) {
    g_set_error_literal(error, FWUPD_ERROR, FWUPD_ERROR_NOT_SUPPORTED, "not supported");
    return FALSE;
  }
  return efivars_class->get_data(self, guid, name, data, data_sz, attr, error);
}

/**
 * fu_efivars_get_attrs:
 * @self: a #FuEfivars
 * @guid: Globally unique identifier
 * @name: Variable name
 * @attrs: (nullable) (out): #FuEfiVariableAttrs, e.g. %FU_EFI_VARIABLE_ATTR_NON_VOLATILE
 * @error: (nullable): optional return location for an error
 *
 * Gets the attributes from a UEFI variable in NVRAM
 *
 * Returns: %TRUE on success
 *
 * Since: 2.1.1
 **/
gboolean
fu_efivars_get_attrs(FuEfivars *self,
         const gchar *guid,
         const gchar *name,
         FuEfiVariableAttrs *attrs,
         GError **error)
{
  FuEfivarsClass *efivars_class = FU_EFIVARS_GET_CLASS(self);

  g_return_val_if_fail(FU_IS_EFIVARS(self), FALSE);
  g_return_val_if_fail(guid != NULL, FALSE);
  g_return_val_if_fail(name != NULL, FALSE);
  g_return_val_if_fail(error == NULL || *error == NULL, FALSE);

  if (efivars_class->get_data == NULL) {
    g_set_error_literal(error, FWUPD_ERROR, FWUPD_ERROR_NOT_SUPPORTED, "not supported");
    return FALSE;
  }
  return efivars_class->get_data(self, guid, name, NULL, NULL, attrs, error);
}

/**
 * fu_efivars_get_data_bytes:
 * @self: a #FuEfivars
 * @guid: Globally unique identifier
 * @name: Variable name
 * @attr: (out): #FuEfiVariableAttrs, e.g. %FU_EFI_VARIABLE_ATTR_NON_VOLATILE
 * @error: (nullable): optional return location for an error
 *
 * Gets the data from a UEFI variable in NVRAM
 *
 * Returns: (transfer full): a #GBytes, or %NULL
 *
 * Since: 2.0.0
 **/
GBytes *
fu_efivars_get_data_bytes(FuEfivars *self,
        const gchar *guid,
        const gchar *name,
        FuEfiVariableAttrs *attr,
        GError **error)
{
  guint8 *data = NULL;
  gsize datasz = 0;

  g_return_val_if_fail(FU_IS_EFIVARS(self), NULL);
  g_return_val_if_fail(guid != NULL, NULL);
  g_return_val_if_fail(name != NULL, NULL);
  g_return_val_if_fail(error == NULL || *error == NULL, NULL);

  if (!fu_efivars_get_data(self, guid, name, &data, &datasz, attr, error))
    return NULL;
  return g_bytes_new_take(data, datasz);
}

/**
 * fu_efivars_get_names:
 * @self: a #FuEfivars
 * @guid: Globally unique identifier
 * @error: (nullable): optional return location for an error
 *
 * Gets the list of names where the GUID matches. An error is set if there are
 * no names matching the GUID.
 *
 * Returns: (transfer container) (element-type utf8): array of names
 *
 * Since: 2.0.0
 **/
GPtrArray *
fu_efivars_get_names(FuEfivars *self, const gchar *guid, GError **error)
{
  FuEfivarsClass *efivars_class = FU_EFIVARS_GET_CLASS(self);

  g_return_val_if_fail(FU_IS_EFIVARS(self), NULL);
  g_return_val_if_fail(guid != NULL, NULL);
  g_return_val_if_fail(error == NULL || *error == NULL, NULL);

  if (efivars_class->get_names == NULL) {
    g_set_error_literal(error, FWUPD_ERROR, FWUPD_ERROR_NOT_SUPPORTED, "not supported");
    return NULL;
  }
  return efivars_class->get_names(self, guid, error);
}

/**
 * fu_efivars_get_monitor:
 * @self: a #FuEfivars
 * @guid: Globally unique identifier
 * @name: Variable name
 * @error: (nullable): optional return location for an error
 *
 * Returns a file monitor for a specific key.
 *
 * Returns: (transfer full): a #GFileMonitor, or %NULL for an error
 *
 * Since: 2.0.0
 **/
GFileMonitor *
fu_efivars_get_monitor(FuEfivars *self, const gchar *guid, const gchar *name, GError **error)
{
  FuEfivarsClass *efivars_class = FU_EFIVARS_GET_CLASS(self);

  g_return_val_if_fail(FU_IS_EFIVARS(self), NULL);
  g_return_val_if_fail(guid != NULL, NULL);
  g_return_val_if_fail(name != NULL, NULL);

  if (efivars_class->get_monitor == NULL) {
    g_set_error_literal(error, FWUPD_ERROR, FWUPD_ERROR_NOT_SUPPORTED, "not supported");
    return NULL;
  }
  return efivars_class->get_monitor(self, guid, name, error);
}

/**
 * fu_efivars_space_used:
 * @self: a #FuEfivars
 * @error: (nullable): optional return location for an error
 *
 * Gets the total size used by all EFI variables. This may be less than the size reported by the
 * kernel as some (hopefully small) variables are hidden from userspace.
 *
 * Returns: total allocated size of all visible variables, or %G_MAXUINT64 on error
 *
 * Since: 2.0.0
 **/
guint64
fu_efivars_space_used(FuEfivars *self, GError **error)
{
  FuEfivarsClass *efivars_class = FU_EFIVARS_GET_CLASS(self);

  g_return_val_if_fail(FU_IS_EFIVARS(self), G_MAXUINT64);
  g_return_val_if_fail(error == NULL || *error == NULL, G_MAXUINT64);

  if (efivars_class->space_used == NULL) {
    g_set_error_literal(error, FWUPD_ERROR, FWUPD_ERROR_NOT_SUPPORTED, "not supported");
    return G_MAXUINT64;
  }
  return efivars_class->space_used(self, error);
}

/**
 * fu_efivars_space_free:
 * @self: a #FuEfivars
 * @error: (nullable): optional return location for an error
 *
 * Gets the free size available for new EFI variables, as reported from QueryVariableInfo.
 *
 * Returns: free space in bytes, or %G_MAXUINT64 on error
 *
 * Since: 2.0.12
 **/
guint64
fu_efivars_space_free(FuEfivars *self, GError **error)
{
  FuEfivarsClass *efivars_class = FU_EFIVARS_GET_CLASS(self);

  g_return_val_if_fail(FU_IS_EFIVARS(self), G_MAXUINT64);
  g_return_val_if_fail(error == NULL || *error == NULL, G_MAXUINT64);

  if (efivars_class->space_free == NULL) {
    g_set_error_literal(error, FWUPD_ERROR, FWUPD_ERROR_NOT_SUPPORTED, "not supported");
    return G_MAXUINT64;
  }
  return efivars_class->space_free(self, error);
}

/**
 * fu_efivars_set_data:
 * @self: a #FuEfivars
 * @guid: Globally unique identifier
 * @name: Variable name
 * @data: Data to set
 * @sz: size of @data
 * @attr: #FuEfiVariableAttrs, e.g. %FU_EFI_VARIABLE_ATTR_NON_VOLATILE
 * @error: (nullable): optional return location for an error
 *
 * Sets the data to a UEFI variable in NVRAM
 *
 * Returns: %TRUE on success
 *
 * Since: 2.0.0
 **/
gboolean
fu_efivars_set_data(FuEfivars *self,
        const gchar *guid,
        const gchar *name,
        const guint8 *data,
        gsize sz,
        FuEfiVariableAttrs attr,
        GError **error)
{
  FuEfivarsClass *efivars_class = FU_EFIVARS_GET_CLASS(self);

  g_return_val_if_fail(FU_IS_EFIVARS(self), FALSE);
  g_return_val_if_fail(guid != NULL, FALSE);
  g_return_val_if_fail(name != NULL, FALSE);
  g_return_val_if_fail(data != NULL, FALSE);
  g_return_val_if_fail(error == NULL || *error == NULL, FALSE);

  if (efivars_class->set_data == NULL) {
    g_set_error_literal(error, FWUPD_ERROR, FWUPD_ERROR_NOT_SUPPORTED, "not supported");
    return FALSE;
  }
  return efivars_class->set_data(self, guid, name, data, sz, attr, error);
}

/**
 * fu_efivars_set_data_bytes:
 * @self: a #FuEfivars
 * @guid: globally unique identifier
 * @name: variable name
 * @bytes: data blob
 * @attr: #FuEfiVariableAttrs, e.g. %FU_EFI_VARIABLE_ATTR_NON_VOLATILE
 * @error: (nullable): optional return location for an error
 *
 * Sets the data to a UEFI variable in NVRAM
 *
 * Returns: %TRUE on success
 *
 * Since: 2.0.0
 **/
gboolean
fu_efivars_set_data_bytes(FuEfivars *self,
        const gchar *guid,
        const gchar *name,
        GBytes *bytes,
        FuEfiVariableAttrs attr,
        GError **error)
{
  gsize bufsz = 0;
  const guint8 *buf;

  g_return_val_if_fail(FU_IS_EFIVARS(self), FALSE);
  g_return_val_if_fail(guid != NULL, FALSE);
  g_return_val_if_fail(name != NULL, FALSE);
  g_return_val_if_fail(bytes != NULL, FALSE);
  g_return_val_if_fail(error == NULL || *error == NULL, FALSE);

  buf = g_bytes_get_data(bytes, &bufsz);
  return fu_efivars_set_data(self, guid, name, buf, bufsz, attr, error);
}

/**
 * fu_efivars_get_secure_boot:
 * @self: a #FuEfivars
 * @enabled: (out): SecureBoot value
 * @error: (nullable): optional return location for an error
 *
 * Determines if secure boot was enabled
 *
 * Returns: %TRUE on success
 *
 * Since: 2.0.0
 **/
gboolean
fu_efivars_get_secure_boot(FuEfivars *self, gboolean *enabled, GError **error)
{
  gsize data_size = 0;
  g_autofree guint8 *data = NULL;

  g_return_val_if_fail(FU_IS_EFIVARS(self), FALSE);
  g_return_val_if_fail(error == NULL || *error == NULL, FALSE);

  if (!fu_efivars_get_data(self,
         FU_EFIVARS_GUID_EFI_GLOBAL,
         "SecureBoot",
         &data,
         &data_size,
         NULL,
         NULL)) {
    g_set_error_literal(error,
            FWUPD_ERROR,
            FWUPD_ERROR_NOT_SUPPORTED,
            "SecureBoot is not available");
    return FALSE;
  }
  if (data_size == 0) {
    g_set_error_literal(error,
            FWUPD_ERROR,
            FWUPD_ERROR_NOT_SUPPORTED,
            "SecureBoot variable was empty");
    return FALSE;
  }

  /* available, but not enabled */
  if (enabled != NULL)
    *enabled = (data[0] & 0x01) > 0;

  /* success */
  return TRUE;
}

/**
 * fu_efivars_set_secure_boot: (skip):
 **/
gboolean
fu_efivars_set_secure_boot(FuEfivars *self, gboolean enabled, GError **error)
{
  guint8 value = enabled ? 0x01 : 0x00;
  g_return_val_if_fail(FU_IS_EFIVARS(self), FALSE);
  g_return_val_if_fail(error == NULL || *error == NULL, FALSE);
  return fu_efivars_set_data(self,
           FU_EFIVARS_GUID_EFI_GLOBAL,
           "SecureBoot",
           &value,
           sizeof(value),
           FU_EFI_VARIABLE_ATTR_BOOTSERVICE_ACCESS,
           error);
}

/**
 * fu_efivars_get_boot_next:
 * @self: a #FuEfivars
 * @idx: (out) (nullable): boot index, typically 0x0001
 * @error: #GError
 *
 * Gets the index of the `BootNext` variable.
 *
 * Returns: %TRUE on success
 *
 * Since: 2.0.0
 **/
gboolean
fu_efivars_get_boot_next(FuEfivars *self, guint16 *idx, GError **error)
{
  g_autofree guint8 *buf = NULL;
  gsize bufsz = 0;

  g_return_val_if_fail(FU_IS_EFIVARS(self), FALSE);
  g_return_val_if_fail(error == NULL || *error == NULL, FALSE);

  if (!fu_efivars_get_data(self,
         FU_EFIVARS_GUID_EFI_GLOBAL,
         "BootNext",
         &buf,
         &bufsz,
         NULL,
         error))
    return FALSE;
  if (bufsz != sizeof(guint16)) {
    g_set_error_literal(error, FWUPD_ERROR, FWUPD_ERROR_INVALID_DATA, "invalid size");
    return FALSE;
  }
  if (idx != NULL)
    *idx = fu_memread_uint16(buf, G_LITTLE_ENDIAN);

  /* success */
  return TRUE;
}

/**
 * fu_efivars_set_boot_next:
 * @self: a #FuEfivars
 * @idx: boot index, typically 0x0001
 * @error: #GError
 *
 * Sets the index of the `BootNext` variable.
 *
 * Returns: %TRUE on success
 *
 * Since: 2.0.0
 **/
gboolean
fu_efivars_set_boot_next(FuEfivars *self, guint16 idx, GError **error)
{
  guint8 buf[2] = {0};
  g_return_val_if_fail(FU_IS_EFIVARS(self), FALSE);
  g_return_val_if_fail(error == NULL || *error == NULL, FALSE);
  fu_memwrite_uint16(buf, idx, G_LITTLE_ENDIAN);
  return fu_efivars_set_data(self,
           FU_EFIVARS_GUID_EFI_GLOBAL,
           "BootNext",
           buf,
           sizeof(buf),
           FU_EFI_VARIABLE_ATTR_NON_VOLATILE |
               FU_EFI_VARIABLE_ATTR_BOOTSERVICE_ACCESS |
               FU_EFI_VARIABLE_ATTR_RUNTIME_ACCESS,
           error);
}

/**
 * fu_efivars_get_boot_current:
 * @self: a #FuEfivars
 * @idx: (out): boot index, typically 0x0001
 * @error: #GError
 *
 * Gets the index of the `BootCurrent` variable.
 *
 * Returns: %TRUE on success
 *
 * Since: 2.0.0
 **/
gboolean
fu_efivars_get_boot_current(FuEfivars *self, guint16 *idx, GError **error)
{
  g_autofree guint8 *buf = NULL;
  gsize bufsz = 0;

  g_return_val_if_fail(FU_IS_EFIVARS(self), FALSE);
  g_return_val_if_fail(error == NULL || *error == NULL, FALSE);

  if (!fu_efivars_get_data(self,
         FU_EFIVARS_GUID_EFI_GLOBAL,
         "BootCurrent",
         &buf,
         &bufsz,
         NULL,
         error))
    return FALSE;
  if (bufsz != sizeof(guint16)) {
    g_set_error_literal(error, FWUPD_ERROR, FWUPD_ERROR_INVALID_DATA, "invalid size");
    return FALSE;
  }
  if (idx != NULL)
    *idx = fu_memread_uint16(buf, G_LITTLE_ENDIAN);

  /* success */
  return TRUE;
}

/**
 * fu_efivars_set_boot_current: (skip):
 **/
gboolean
fu_efivars_set_boot_current(FuEfivars *self, guint16 idx, GError **error)
{
  guint8 buf[2] = {0};

  g_return_val_if_fail(FU_IS_EFIVARS(self), FALSE);
  g_return_val_if_fail(error == NULL || *error == NULL, FALSE);

  fu_memwrite_uint16(buf, idx, G_LITTLE_ENDIAN);
  return fu_efivars_set_data(self,
           FU_EFIVARS_GUID_EFI_GLOBAL,
           "BootCurrent",
           buf,
           sizeof(buf),
           FU_EFI_VARIABLE_ATTR_NON_VOLATILE |
               FU_EFI_VARIABLE_ATTR_RUNTIME_ACCESS,
           error);
}

/**
 * fu_efivars_get_boot_order:
 * @self: a #FuEfivars
 * @error: #GError
 *
 * Gets the indexes of the `BootOrder` variable.
 *
 * Returns: (transfer full) (element-type guint16): boot order, or %NULL on error
 *
 * Since: 2.0.0
 **/
GArray *
fu_efivars_get_boot_order(FuEfivars *self, GError **error)
{
  gsize bufsz = 0;
  g_autofree guint8 *buf = NULL;
  g_autoptr(GArray) order = g_array_new(FALSE, FALSE, sizeof(guint16));

  g_return_val_if_fail(FU_IS_EFIVARS(self), NULL);
  g_return_val_if_fail(error == NULL || *error == NULL, NULL);

  if (!fu_efivars_get_data(self,
         FU_EFIVARS_GUID_EFI_GLOBAL,
         "BootOrder",
         &buf,
         &bufsz,
         NULL,
         error))
    return NULL;
  if (bufsz % sizeof(guint16) != 0) {
    g_set_error_literal(error, FWUPD_ERROR, FWUPD_ERROR_INVALID_DATA, "invalid size");
    return NULL;
  }
  for (gsize i = 0; i < bufsz; i += sizeof(guint16)) {
    guint16 idx = fu_memread_uint16(buf + i, G_LITTLE_ENDIAN);
    g_array_append_val(order, idx);
  }

  /* success */
  return g_steal_pointer(&order);
}

/**
 * fu_efivars_set_boot_order:
 * @self: a #FuEfivars
 * @order: (element-type guint16): boot order
 * @error: #GError
 *
 * Sets the index of the `BootNext` variable.
 *
 * Returns: %TRUE on success
 *
 * Since: 2.0.0
 **/
gboolean
fu_efivars_set_boot_order(FuEfivars *self, GArray *order, GError **error)
{
  g_autoptr(GByteArray) buf = g_byte_array_new();

  g_return_val_if_fail(FU_IS_EFIVARS(self), FALSE);
  g_return_val_if_fail(order != NULL, FALSE);
  g_return_val_if_fail(error == NULL || *error == NULL, FALSE);

  for (guint i = 0; i < order->len; i++) {
    guint16 idx = g_array_index(order, guint16, i);
    fu_byte_array_append_uint16(buf, idx, G_LITTLE_ENDIAN);
  }
  return fu_efivars_set_data(self,
           FU_EFIVARS_GUID_EFI_GLOBAL,
           "BootOrder",
           buf->data,
           buf->len,
           FU_EFI_VARIABLE_ATTR_NON_VOLATILE |
               FU_EFI_VARIABLE_ATTR_BOOTSERVICE_ACCESS |
               FU_EFI_VARIABLE_ATTR_RUNTIME_ACCESS,
           error);
}

/**
 * fu_efivars_build_boot_order: (skip)
 **/
gboolean
fu_efivars_build_boot_order(FuEfivars *self, GError **error, ...)
{
  va_list args;
  g_autoptr(GArray) order = g_array_new(FALSE, FALSE, sizeof(guint16));

  g_return_val_if_fail(FU_IS_EFIVARS(self), FALSE);
  g_return_val_if_fail(error == NULL || *error == NULL, FALSE);

  va_start(args, error);
  while (TRUE) {
    guint16 idx = va_arg(args, guint);
    if (idx == G_MAXUINT16)
      break;
    g_array_append_val(order, idx);
  }
  va_end(args);

  /* success */
  return fu_efivars_set_boot_order(self, order, error);
}

/**
 * fu_efivars_create_boot_entry_for_volume:
 * @self: a #FuEfivars
 * @idx: boot index, typically 0x0001
 * @volume: a #FuVolume
 * @name: a display name, e.g. "Fedora"
 * @target: an EFI binary, e.g. "shim.efi"
 * @error: #GError
 *
 * Creates a BootXXXX variable for a given volume, name and target.
 *
 * If @target does not exist on the volume then a dummy file is created.
 *
 * Returns: %TRUE on success
 *
 * Since: 2.0.6
 **/
gboolean
fu_efivars_create_boot_entry_for_volume(FuEfivars *self,
          guint16 idx,
          FuVolume *volume,
          const gchar *name,
          const gchar *target,
          GError **error)
{
  g_autoptr(FuEfiDevicePathList) devpath_list = fu_efi_device_path_list_new();
  g_autoptr(FuEfiFilePathDevicePath) dp_fp = NULL;
  g_autoptr(FuEfiHardDriveDevicePath) dp_hdd = NULL;
  g_autoptr(FuEfiLoadOption) entry = fu_efi_load_option_new();
  g_autoptr(GFile) file = NULL;
  g_autofree gchar *mount_point = NULL;

  g_return_val_if_fail(FU_IS_EFIVARS(self), FALSE);
  g_return_val_if_fail(FU_IS_VOLUME(volume), FALSE);
  g_return_val_if_fail(name != NULL, FALSE);
  g_return_val_if_fail(target != NULL, FALSE);
  g_return_val_if_fail(error == NULL || *error == NULL, FALSE);

  /* create plausible EFI file if not already exists */
  mount_point = fu_volume_get_mount_point(volume);
  if (mount_point == NULL) {
    g_set_error_literal(error,
            FWUPD_ERROR,
            FWUPD_ERROR_NOT_SUPPORTED,
            "volume has no mount point");
    return FALSE;
  }
  file = g_file_new_build_filename(mount_point, target, NULL);
  if (!g_file_query_exists(file, NULL)) {
    g_autoptr(FuFirmware) img_text = fu_firmware_new();
    g_autoptr(FuFirmware) pefile = fu_pefile_firmware_new();
    g_autoptr(GBytes) img_blob = g_bytes_new_static("hello", 5);
    fu_firmware_set_id(img_text, ".text");
    fu_firmware_set_bytes(img_text, img_blob);
    if (!fu_firmware_add_image(pefile, img_text, error))
      return FALSE;
    if (!fu_firmware_write_file(pefile, file, error))
      return FALSE;
  }

  dp_hdd = fu_efi_hard_drive_device_path_new_from_volume(volume, error);
  if (dp_hdd == NULL)
    return FALSE;
  dp_fp = fu_efi_file_path_device_path_new();
  if (!fu_efi_file_path_device_path_set_name(dp_fp, target, error))
    return FALSE;
  if (!fu_firmware_add_image(FU_FIRMWARE(devpath_list), FU_FIRMWARE(dp_hdd), error))
    return FALSE;
  if (!fu_firmware_add_image(FU_FIRMWARE(devpath_list), FU_FIRMWARE(dp_fp), error))
    return FALSE;

  fu_firmware_set_id(FU_FIRMWARE(entry), name);
  if (!fu_firmware_add_image(FU_FIRMWARE(entry), FU_FIRMWARE(devpath_list), error))
    return FALSE;
  return fu_efivars_set_boot_entry(self, idx, entry, error);
}

/**
 * fu_efivars_get_boot_data:
 * @self: a #FuEfivars
 * @idx: boot index, typically 0x0001
 * @error: #GError
 *
 * Gets the raw data of the `BootXXXX` variable.
 *
 * Returns: (transfer full): boot data
 *
 * Since: 2.0.0
 **/
GBytes *
fu_efivars_get_boot_data(FuEfivars *self, guint16 idx, GError **error)
{
  g_autofree gchar *name = g_strdup_printf("Boot%04X", idx);
  g_return_val_if_fail(FU_IS_EFIVARS(self), NULL);
  g_return_val_if_fail(error == NULL || *error == NULL, NULL);
  return fu_efivars_get_data_bytes(self, FU_EFIVARS_GUID_EFI_GLOBAL, name, NULL, error);
}

/**
 * fu_efivars_set_boot_data:
 * @self: a #FuEfivars
 * @idx: boot index, typically 0x0001
 * @blob: #GBytes
 * @error: #GError
 *
 * Sets the raw data of the `BootXXXX` variable. If @blob is %NULL then the boot entry is deleted.
 *
 * Returns: %TRUE for success
 *
 * Since: 2.0.0
 **/
gboolean
fu_efivars_set_boot_data(FuEfivars *self, guint16 idx, GBytes *blob, GError **error)
{
  g_autofree gchar *name = g_strdup_printf("Boot%04X", idx);
  g_return_val_if_fail(FU_IS_EFIVARS(self), FALSE);
  g_return_val_if_fail(error == NULL || *error == NULL, FALSE);

  if (blob == NULL)
    return fu_efivars_delete(self, FU_EFIVARS_GUID_EFI_GLOBAL, name, error);
  return fu_efivars_set_data_bytes(self,
           FU_EFIVARS_GUID_EFI_GLOBAL,
           name,
           blob,
           FU_EFI_VARIABLE_ATTR_NON_VOLATILE |
               FU_EFI_VARIABLE_ATTR_BOOTSERVICE_ACCESS |
               FU_EFI_VARIABLE_ATTR_RUNTIME_ACCESS,
           error);
}

/**
 * fu_efivars_get_boot_entry:
 * @self: a #FuEfivars
 * @idx: boot index, typically 0x0001
 * @error: #GError
 *
 * Gets the loadopt data of the `BootXXXX` variable.
 *
 * Returns: (transfer full): a #FuEfiLoadOption, or %NULL
 *
 * Since: 2.0.0
 **/
FuEfiLoadOption *
fu_efivars_get_boot_entry(FuEfivars *self, guint16 idx, GError **error)
{
  g_autofree gchar *name = g_strdup_printf("Boot%04X", idx);
  g_autoptr(FuEfiLoadOption) loadopt = fu_efi_load_option_new();
  g_autoptr(GBytes) blob = NULL;

  g_return_val_if_fail(FU_IS_EFIVARS(self), NULL);
  g_return_val_if_fail(error == NULL || *error == NULL, NULL);

  /* get data */
  blob = fu_efivars_get_data_bytes(self, FU_EFIVARS_GUID_EFI_GLOBAL, name, NULL, error);
  if (blob == NULL)
    return NULL;
  if (!fu_firmware_parse_bytes(FU_FIRMWARE(loadopt),
             blob,
             0x0,
             FU_FIRMWARE_PARSE_FLAG_NONE,
             error))
    return NULL;
  fu_firmware_set_idx(FU_FIRMWARE(loadopt), idx);
  return g_steal_pointer(&loadopt);
}

/**
 * fu_efivars_set_boot_entry:
 * @self: a #FuEfivars
 * @idx: boot index, typically 0x0001
 * @entry: a #FuEfiLoadOption
 * @error: #GError
 *
 * Sets the loadopt data of the `BootXXXX` variable.
 *
 * Returns: %TRUE for success
 *
 * Since: 2.0.0
 **/
gboolean
fu_efivars_set_boot_entry(FuEfivars *self, guint16 idx, FuEfiLoadOption *entry, GError **error)
{
  g_autoptr(GBytes) blob = NULL;

  g_return_val_if_fail(FU_IS_EFIVARS(self), FALSE);
  g_return_val_if_fail(FU_IS_EFI_LOAD_OPTION(entry), FALSE);
  g_return_val_if_fail(error == NULL || *error == NULL, FALSE);

  blob = fu_firmware_write(FU_FIRMWARE(entry), error);
  if (blob == NULL)
    return FALSE;
  return fu_efivars_set_boot_data(self, idx, blob, error);
}

/**
 * fu_efivars_get_boot_entries:
 * @self: a #FuEfivars
 * @error: #GError
 *
 * Gets the loadopt data for all the entries listed in `BootOrder`.
 *
 * Returns: (transfer full) (element-type FuEfiLoadOption): boot data
 *
 * Since: 2.0.0
 **/
GPtrArray *
fu_efivars_get_boot_entries(FuEfivars *self, GError **error)
{
  g_autoptr(GArray) order = NULL;
  g_autoptr(GPtrArray) array = g_ptr_array_new_with_free_func((GDestroyNotify)g_object_unref);

  g_return_val_if_fail(FU_IS_EFIVARS(self), NULL);
  g_return_val_if_fail(error == NULL || *error == NULL, NULL);

  order = fu_efivars_get_boot_order(self, error);
  if (order == NULL)
    return NULL;
  for (guint i = 0; i < order->len; i++) {
    guint16 idx = g_array_index(order, guint16, i);
    g_autoptr(FuEfiLoadOption) loadopt = NULL;

    loadopt = fu_efivars_get_boot_entry(self, idx, error);
    if (loadopt == NULL) {
      g_prefix_error(error, "failed to load Boot%04X: ", idx);
      return NULL;
    }
    g_ptr_array_add(array, g_steal_pointer(&loadopt));
  }

  /* success */
  return g_steal_pointer(&array);
}

static void
fu_efivars_get_property(GObject *object, guint prop_id, GValue *value, GParamSpec *pspec)
{
  FuEfivars *self = FU_EFIVARS(object);
  FuEfivarsPrivate *priv = GET_PRIVATE(self);
  switch (prop_id) {
  case PROP_PATH_STORE:
    g_value_set_object(value, priv->pstore);
    break;
  default:
    G_OBJECT_WARN_INVALID_PROPERTY_ID(object, prop_id, pspec);
    break;
  }
}

static void
fu_efivars_set_property(GObject *object, guint prop_id, const GValue *value, GParamSpec *pspec)
{
  FuEfivars *self = FU_EFIVARS(object);
  FuEfivarsPrivate *priv = GET_PRIVATE(self);
  switch (prop_id) {
  case PROP_PATH_STORE:
    g_set_object(&priv->pstore, g_value_get_object(value));
    break;
  default:
    G_OBJECT_WARN_INVALID_PROPERTY_ID(object, prop_id, pspec);
    break;
  }
}

static void
fu_efivars_init(FuEfivars *self)
{
}

static void
fu_efivars_finalize(GObject *object)
{
  FuEfivars *self = FU_EFIVARS(object);
  FuEfivarsPrivate *priv = GET_PRIVATE(self);

  if (priv->pstore != NULL)
    g_object_unref(priv->pstore);

  G_OBJECT_CLASS(fu_efivars_parent_class)->finalize(object);
}

static void
fu_efivars_class_init(FuEfivarsClass *klass)
{
  GObjectClass *object_class = G_OBJECT_CLASS(klass);
  GParamSpec *pspec;

  object_class->get_property = fu_efivars_get_property;
  object_class->set_property = fu_efivars_set_property;
  object_class->finalize = fu_efivars_finalize;

  pspec = g_param_spec_object("path-store",
            NULL,
            NULL,
            FU_TYPE_PATH_STORE,
            G_PARAM_READWRITE | G_PARAM_CONSTRUCT | G_PARAM_STATIC_NAME);
  g_object_class_install_property(object_class, PROP_PATH_STORE, pspec);
}

Coverage Report

Created: 2026-09-03 07:14