/* * Copyright (C) 2019 Richard Hughes * * SPDX-License-Identifier: LGPL-2.1+ */ #include "config.h" #include #include "fu-tpm-device.h" struct _FuTpmDevice { FuUdevDevice parent_instance; gchar *family; }; G_DEFINE_TYPE (FuTpmDevice, fu_tpm_device, FU_TYPE_UDEV_DEVICE) static void Esys_Finalize_autoptr_cleanup (ESYS_CONTEXT *esys_context) { Esys_Finalize (&esys_context); } G_DEFINE_AUTOPTR_CLEANUP_FUNC (ESYS_CONTEXT, Esys_Finalize_autoptr_cleanup) const gchar * fu_tpm_device_get_family (FuTpmDevice *self) { return self->family; } static gboolean fu_tpm_device_probe (FuDevice *device, GError **error) { /* FuUdevDevice->probe */ if (!FU_DEVICE_CLASS (fu_tpm_device_parent_class)->probe (device, error)) return FALSE; return fu_udev_device_set_physical_id (FU_UDEV_DEVICE (device), "tpm", error); } static gboolean fu_tpm_device_get_uint32 (ESYS_CONTEXT *ctx, guint32 query, guint32 *val, GError **error) { TSS2_RC rc; g_autofree TPMS_CAPABILITY_DATA *capability = NULL; g_return_val_if_fail (val != NULL, FALSE); rc = Esys_GetCapability (ctx, ESYS_TR_NONE, ESYS_TR_NONE, ESYS_TR_NONE, TPM2_CAP_TPM_PROPERTIES, query, 1, NULL, &capability); if (rc != TSS2_RC_SUCCESS) { g_set_error (error, G_IO_ERROR, G_IO_ERROR_NOT_SUPPORTED, "capability request failed for query %x", query); return FALSE; } if (capability->data.tpmProperties.count == 0) { g_set_error (error, G_IO_ERROR, G_IO_ERROR_NOT_SUPPORTED, "no properties returned for query %x", query); return FALSE; } if (capability->data.tpmProperties.tpmProperty[0].property != query) { g_set_error (error, G_IO_ERROR, G_IO_ERROR_NOT_SUPPORTED, "wrong query returned (got %x expected %x)", capability->data.tpmProperties.tpmProperty[0].property, query); return FALSE; } *val = capability->data.tpmProperties.tpmProperty[0].value; return TRUE; } static gchar * fu_tpm_device_get_string (ESYS_CONTEXT *ctx, guint32 query, GError **error) { guint32 val_be = 0; guint32 val; gchar result[5] = {'\0'}; /* return four bytes */ if (!fu_tpm_device_get_uint32 (ctx, query, &val_be, error)) return NULL; val = GUINT32_FROM_BE(val_be); memcpy (result, (gchar *) &val, 4); /* convert non-ASCII into spaces */ for (guint i = 0; i < 4; i++) { if (!g_ascii_isgraph (result[i])) result[i] = 0x20; } return fu_common_strstrip (result); } /* taken from TCG-TPM-Vendor-ID-Registry-Version-1.01-Revision-1.00.pdf */ static const gchar * fu_tpm_device_convert_manufacturer (const gchar *manufacturer) { if (g_strcmp0 (manufacturer, "AMD") == 0) return "AMD"; if (g_strcmp0 (manufacturer, "ATML") == 0) return "Atmel"; if (g_strcmp0 (manufacturer, "BRCM") == 0) return "Broadcom"; if (g_strcmp0 (manufacturer, "HPE") == 0) return "HPE"; if (g_strcmp0 (manufacturer, "IBM") == 0) return "IBM"; if (g_strcmp0 (manufacturer, "IFX") == 0) return "Infineon"; if (g_strcmp0 (manufacturer, "INTC") == 0) return "Intel"; if (g_strcmp0 (manufacturer, "LEN") == 0) return "Lenovo"; if (g_strcmp0 (manufacturer, "MSFT") == 0) return "Microsoft"; if (g_strcmp0 (manufacturer, "NSM") == 0) return "National Semiconductor"; if (g_strcmp0 (manufacturer, "NTZ") == 0) return "Nationz"; if (g_strcmp0 (manufacturer, "NTC") == 0) return "Nuvoton Technology"; if (g_strcmp0 (manufacturer, "QCOM") == 0) return "Qualcomm"; if (g_strcmp0 (manufacturer, "SMSC") == 0) return "SMSC"; if (g_strcmp0 (manufacturer, "STM") == 0) return "ST Microelectronics"; if (g_strcmp0 (manufacturer, "SMSN") == 0) return "Samsung"; if (g_strcmp0 (manufacturer, "SNS") == 0) return "Sinosun"; if (g_strcmp0 (manufacturer, "TXN") == 0) return "Texas Instruments"; if (g_strcmp0 (manufacturer, "WEC") == 0) return "Winbond"; if (g_strcmp0 (manufacturer, "ROCC") == 0) return "Fuzhou Rockchip"; if (g_strcmp0 (manufacturer, "GOOG") == 0) return "Google"; return NULL; } static gboolean fu_tpm_device_setup (FuDevice *device, GError **error) { FuTpmDevice *self = FU_TPM_DEVICE (device); FwupdVersionFormat verfmt; TSS2_RC rc; const gchar *tmp; guint32 tpm_type = 0; guint32 version1 = 0; guint32 version2 = 0; guint64 version_raw; g_autofree gchar *id1 = NULL; g_autofree gchar *id2 = NULL; g_autofree gchar *id3 = NULL; g_autofree gchar *id4 = NULL; g_autofree gchar *manufacturer = NULL; g_autofree gchar *model1 = NULL; g_autofree gchar *model2 = NULL; g_autofree gchar *model3 = NULL; g_autofree gchar *model4 = NULL; g_autofree gchar *model = NULL; g_autofree gchar *vendor_id = NULL; g_autofree gchar *version = NULL; g_autoptr(ESYS_CONTEXT) ctx = NULL; /* setup TSS */ rc = Esys_Initialize (&ctx, NULL, NULL); if (rc != TSS2_RC_SUCCESS) { g_set_error_literal (error, FWUPD_ERROR, FWUPD_ERROR_NOT_FOUND, "failed to initialize TPM library"); return FALSE; } rc = Esys_Startup (ctx, TPM2_SU_CLEAR); if (rc != TSS2_RC_SUCCESS) { g_set_error_literal (error, G_IO_ERROR, G_IO_ERROR_NOT_SUPPORTED, "failed to initialize TPM"); return FALSE; } /* lookup guaranteed details from TPM */ self->family = fu_tpm_device_get_string (ctx, TPM2_PT_FAMILY_INDICATOR, error); if (self->family == NULL) { g_prefix_error (error, "failed to read TPM family: "); return FALSE; } manufacturer = fu_tpm_device_get_string (ctx, TPM2_PT_MANUFACTURER, error); if (manufacturer == NULL) { g_prefix_error (error, "failed to read TPM manufacturer: "); return FALSE; } model1 = fu_tpm_device_get_string (ctx, TPM2_PT_VENDOR_STRING_1, error); if (model1 == NULL) { g_prefix_error (error, "failed to read TPM vendor string: "); return FALSE; } if (!fu_tpm_device_get_uint32 (ctx, TPM2_PT_VENDOR_TPM_TYPE, &tpm_type, error)) { g_prefix_error (error, "failed to read TPM type: "); return FALSE; } /* these are not guaranteed by spec and may be NULL */ model2 = fu_tpm_device_get_string (ctx, TPM2_PT_VENDOR_STRING_2, error); model3 = fu_tpm_device_get_string (ctx, TPM2_PT_VENDOR_STRING_3, error); model4 = fu_tpm_device_get_string (ctx, TPM2_PT_VENDOR_STRING_4, error); model = g_strjoin ("", model1, model2, model3, model4, NULL); /* add GUIDs to daemon */ id1 = g_strdup_printf ("TPM\\VEN_%s&DEV_%04X", manufacturer, tpm_type); fu_device_add_instance_id (device, id1); id2 = g_strdup_printf ("TPM\\VEN_%s&MOD_%s", manufacturer, model); fu_device_add_instance_id (device, id2); id3 = g_strdup_printf ("TPM\\VEN_%s&DEV_%04X&VER_%s", manufacturer, tpm_type, self->family); fu_device_add_instance_id (device, id3); id4 = g_strdup_printf ("TPM\\VEN_%s&MOD_%s&VER_%s", manufacturer, model, self->family); fu_device_add_instance_id (device, id4); /* enforce vendors can only ship updates for their own hardware */ vendor_id = g_strdup_printf ("TPM:%s", manufacturer); fu_device_add_vendor_id (device, vendor_id); tmp = fu_tpm_device_convert_manufacturer (manufacturer); fu_device_set_vendor (device, tmp != NULL ? tmp : manufacturer); /* get version */ if (!fu_tpm_device_get_uint32 (ctx, TPM2_PT_FIRMWARE_VERSION_1, &version1, error)) return FALSE; if (!fu_tpm_device_get_uint32 (ctx, TPM2_PT_FIRMWARE_VERSION_2, &version2, error)) return FALSE; version_raw = ((guint64) version1) << 32 | ((guint64) version2); fu_device_set_version_raw (device, version_raw); /* this has to be done after _add_instance_id() sets the quirks */ verfmt = fu_device_get_version_format (device); version = fu_common_version_from_uint64 (version_raw, verfmt); fu_device_set_version_format (device, verfmt); fu_device_set_version (device, version); /* success */ return TRUE; } static void fu_tpm_device_init (FuTpmDevice *self) { fu_device_set_name (FU_DEVICE (self), "TPM"); fu_device_set_version_format (FU_DEVICE (self), FWUPD_VERSION_FORMAT_QUAD); fu_device_add_flag (FU_DEVICE (self), FWUPD_DEVICE_FLAG_INTERNAL); fu_device_add_icon (FU_DEVICE (self), "computer"); fu_udev_device_set_flags (FU_UDEV_DEVICE (self), FU_UDEV_DEVICE_FLAG_NONE); fu_device_add_instance_id_full (FU_DEVICE (self), "system-tpm", FU_DEVICE_INSTANCE_FLAG_NO_QUIRKS); } static void fu_tpm_device_finalize (GObject *object) { FuTpmDevice *self = FU_TPM_DEVICE (object); g_free (self->family); G_OBJECT_CLASS (fu_tpm_device_parent_class)->finalize (object); } static void fu_tpm_device_class_init (FuTpmDeviceClass *klass) { GObjectClass *object_class = G_OBJECT_CLASS (klass); FuDeviceClass *klass_device = FU_DEVICE_CLASS (klass); object_class->finalize = fu_tpm_device_finalize; klass_device->setup = fu_tpm_device_setup; klass_device->probe = fu_tpm_device_probe; }