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Diffstat (limited to 'cmd/eficonfig_sbkey.c')
-rw-r--r--cmd/eficonfig_sbkey.c498
1 files changed, 498 insertions, 0 deletions
diff --git a/cmd/eficonfig_sbkey.c b/cmd/eficonfig_sbkey.c
new file mode 100644
index 00000000000..6e0bebf1d41
--- /dev/null
+++ b/cmd/eficonfig_sbkey.c
@@ -0,0 +1,498 @@
+// SPDX-License-Identifier: GPL-2.0+
+/*
+ * Menu-driven UEFI Secure Boot Key Maintenance
+ *
+ * Copyright (c) 2022 Masahisa Kojima, Linaro Limited
+ */
+
+#include <ansi.h>
+#include <common.h>
+#include <charset.h>
+#include <hexdump.h>
+#include <log.h>
+#include <malloc.h>
+#include <menu.h>
+#include <efi_loader.h>
+#include <efi_config.h>
+#include <efi_variable.h>
+#include <crypto/pkcs7_parser.h>
+
+struct eficonfig_sig_data {
+ struct efi_signature_list *esl;
+ struct efi_signature_data *esd;
+ struct list_head list;
+ u16 *varname;
+};
+
+enum efi_sbkey_signature_type {
+ SIG_TYPE_X509 = 0,
+ SIG_TYPE_HASH,
+ SIG_TYPE_CRL,
+ SIG_TYPE_RSA2048,
+};
+
+struct eficonfig_sigtype_to_str {
+ efi_guid_t sig_type;
+ char *str;
+ enum efi_sbkey_signature_type type;
+};
+
+static const struct eficonfig_sigtype_to_str sigtype_to_str[] = {
+ {EFI_CERT_X509_GUID, "X509", SIG_TYPE_X509},
+ {EFI_CERT_SHA256_GUID, "SHA256", SIG_TYPE_HASH},
+ {EFI_CERT_X509_SHA256_GUID, "X509_SHA256 CRL", SIG_TYPE_CRL},
+ {EFI_CERT_X509_SHA384_GUID, "X509_SHA384 CRL", SIG_TYPE_CRL},
+ {EFI_CERT_X509_SHA512_GUID, "X509_SHA512 CRL", SIG_TYPE_CRL},
+ /* U-Boot does not support the following signature types */
+/* {EFI_CERT_RSA2048_GUID, "RSA2048", SIG_TYPE_RSA2048}, */
+/* {EFI_CERT_RSA2048_SHA256_GUID, "RSA2048_SHA256", SIG_TYPE_RSA2048}, */
+/* {EFI_CERT_SHA1_GUID, "SHA1", SIG_TYPE_HASH}, */
+/* {EFI_CERT_RSA2048_SHA_GUID, "RSA2048_SHA", SIG_TYPE_RSA2048 }, */
+/* {EFI_CERT_SHA224_GUID, "SHA224", SIG_TYPE_HASH}, */
+/* {EFI_CERT_SHA384_GUID, "SHA384", SIG_TYPE_HASH}, */
+/* {EFI_CERT_SHA512_GUID, "SHA512", SIG_TYPE_HASH}, */
+};
+
+/**
+ * file_have_auth_header() - check file has EFI_VARIABLE_AUTHENTICATION_2 header
+ * @buf: pointer to file
+ * @size: file size
+ * Return: true if file has auth header, false otherwise
+ */
+static bool file_have_auth_header(void *buf, efi_uintn_t size)
+{
+ struct efi_variable_authentication_2 *auth = buf;
+
+ if (auth->auth_info.hdr.wCertificateType != WIN_CERT_TYPE_EFI_GUID)
+ return false;
+
+ if (guidcmp(&auth->auth_info.cert_type, &efi_guid_cert_type_pkcs7))
+ return false;
+
+ return true;
+}
+
+/**
+ * eficonfig_process_enroll_key() - enroll key into signature database
+ *
+ * @data: pointer to the data for each entry
+ * Return: status code
+ */
+static efi_status_t eficonfig_process_enroll_key(void *data)
+{
+ u32 attr;
+ char *buf = NULL;
+ efi_uintn_t size;
+ efi_status_t ret;
+ struct efi_file_handle *f = NULL;
+ struct efi_device_path *full_dp = NULL;
+ struct eficonfig_select_file_info file_info;
+
+ file_info.current_path = calloc(1, EFICONFIG_FILE_PATH_BUF_SIZE);
+ if (!file_info.current_path) {
+ ret = EFI_OUT_OF_RESOURCES;
+ goto out;
+ }
+
+ ret = eficonfig_process_select_file(&file_info);
+ if (ret != EFI_SUCCESS)
+ goto out;
+
+ full_dp = eficonfig_create_device_path(file_info.dp_volume, file_info.current_path);
+ if (!full_dp) {
+ ret = EFI_OUT_OF_RESOURCES;
+ goto out;
+ }
+ f = efi_file_from_path(full_dp);
+ if (!f) {
+ ret = EFI_NOT_FOUND;
+ goto out;
+ }
+
+ size = 0;
+ ret = EFI_CALL(f->getinfo(f, &efi_file_info_guid, &size, NULL));
+ if (ret != EFI_BUFFER_TOO_SMALL)
+ goto out;
+
+ buf = malloc(size);
+ if (!buf) {
+ ret = EFI_OUT_OF_RESOURCES;
+ goto out;
+ }
+ ret = EFI_CALL(f->getinfo(f, &efi_file_info_guid, &size, buf));
+ if (ret != EFI_SUCCESS)
+ goto out;
+
+ size = ((struct efi_file_info *)buf)->file_size;
+ free(buf);
+
+ if (!size) {
+ eficonfig_print_msg("ERROR! File is empty.");
+ ret = EFI_INVALID_PARAMETER;
+ goto out;
+ }
+
+ buf = malloc(size);
+ if (!buf) {
+ ret = EFI_OUT_OF_RESOURCES;
+ goto out;
+ }
+
+ ret = EFI_CALL(f->read(f, &size, buf));
+ if (ret != EFI_SUCCESS) {
+ eficonfig_print_msg("ERROR! Failed to read file.");
+ goto out;
+ }
+ if (!file_have_auth_header(buf, size)) {
+ eficonfig_print_msg("ERROR! Invalid file format. Only .auth variables is allowed.");
+ ret = EFI_INVALID_PARAMETER;
+ goto out;
+ }
+
+ attr = EFI_VARIABLE_NON_VOLATILE |
+ EFI_VARIABLE_BOOTSERVICE_ACCESS |
+ EFI_VARIABLE_RUNTIME_ACCESS |
+ EFI_VARIABLE_TIME_BASED_AUTHENTICATED_WRITE_ACCESS;
+
+ /* PK can enroll only one certificate */
+ if (u16_strcmp(data, u"PK")) {
+ efi_uintn_t db_size = 0;
+
+ /* check the variable exists. If exists, add APPEND_WRITE attribute */
+ ret = efi_get_variable_int(data, efi_auth_var_get_guid(data), NULL,
+ &db_size, NULL, NULL);
+ if (ret == EFI_BUFFER_TOO_SMALL)
+ attr |= EFI_VARIABLE_APPEND_WRITE;
+ }
+
+ ret = efi_set_variable_int((u16 *)data, efi_auth_var_get_guid((u16 *)data),
+ attr, size, buf, false);
+ if (ret != EFI_SUCCESS)
+ eficonfig_print_msg("ERROR! Failed to update signature database");
+
+out:
+ free(file_info.current_path);
+ free(buf);
+ efi_free_pool(full_dp);
+ if (f)
+ EFI_CALL(f->close(f));
+
+ /* return to the parent menu */
+ ret = (ret == EFI_ABORTED) ? EFI_NOT_READY : ret;
+
+ return ret;
+}
+
+/**
+ * eficonfig_process_show_siglist() - show signature list content
+ *
+ * @data: pointer to the data for each entry
+ * Return: status code
+ */
+static efi_status_t eficonfig_process_show_siglist(void *data)
+{
+ u32 i;
+ struct eficonfig_sig_data *sg = data;
+
+ puts(ANSI_CURSOR_HIDE);
+ puts(ANSI_CLEAR_CONSOLE);
+ printf(ANSI_CURSOR_POSITION, 1, 1);
+
+ printf("\n ** Show Signature Database (%ls) **\n\n"
+ " Owner GUID:\n"
+ " %pUL\n",
+ sg->varname, sg->esd->signature_owner.b);
+
+ for (i = 0; i < ARRAY_SIZE(sigtype_to_str); i++) {
+ if (!guidcmp(&sg->esl->signature_type, &sigtype_to_str[i].sig_type)) {
+ printf(" Signature Type:\n"
+ " %s\n", sigtype_to_str[i].str);
+
+ switch (sigtype_to_str[i].type) {
+ case SIG_TYPE_X509:
+ {
+ struct x509_certificate *cert_tmp;
+
+ cert_tmp = x509_cert_parse(sg->esd->signature_data,
+ sg->esl->signature_size);
+ printf(" Subject:\n"
+ " %s\n"
+ " Issuer:\n"
+ " %s\n",
+ cert_tmp->subject, cert_tmp->issuer);
+ break;
+ }
+ case SIG_TYPE_CRL:
+ {
+ u32 hash_size = sg->esl->signature_size - sizeof(efi_guid_t) -
+ sizeof(struct efi_time);
+ struct efi_time *time =
+ (struct efi_time *)((u8 *)sg->esd->signature_data +
+ hash_size);
+
+ printf(" ToBeSignedHash:\n");
+ print_hex_dump(" ", DUMP_PREFIX_NONE, 16, 1,
+ sg->esd->signature_data, hash_size, false);
+ printf(" TimeOfRevocation:\n"
+ " %d-%d-%d %02d:%02d:%02d\n",
+ time->year, time->month, time->day,
+ time->hour, time->minute, time->second);
+ break;
+ }
+ case SIG_TYPE_HASH:
+ {
+ u32 hash_size = sg->esl->signature_size - sizeof(efi_guid_t);
+
+ printf(" Hash:\n");
+ print_hex_dump(" ", DUMP_PREFIX_NONE, 16, 1,
+ sg->esd->signature_data, hash_size, false);
+ break;
+ }
+ default:
+ eficonfig_print_msg("ERROR! Unsupported format.");
+ return EFI_INVALID_PARAMETER;
+ }
+ }
+ }
+
+ while (tstc())
+ getchar();
+
+ printf("\n\n Press any key to continue");
+ getchar();
+
+ return EFI_SUCCESS;
+}
+
+/**
+ * prepare_signature_list_menu() - create the signature list menu entry
+ *
+ * @efimenu: pointer to the efimenu structure
+ * @varname: pointer to the variable name
+ * @db: pointer to the variable raw data
+ * @db_size: variable data size
+ * @func: callback of each entry
+ * Return: status code
+ */
+static efi_status_t prepare_signature_list_menu(struct efimenu *efi_menu, void *varname,
+ void *db, efi_uintn_t db_size,
+ eficonfig_entry_func func)
+{
+ u32 num = 0;
+ efi_uintn_t size;
+ struct eficonfig_sig_data *sg;
+ struct efi_signature_list *esl;
+ struct efi_signature_data *esd;
+ efi_status_t ret = EFI_SUCCESS;
+
+ INIT_LIST_HEAD(&efi_menu->list);
+
+ esl = db;
+ size = db_size;
+ while (size > 0) {
+ u32 remain;
+
+ esd = (struct efi_signature_data *)((u8 *)esl +
+ (sizeof(struct efi_signature_list) +
+ esl->signature_header_size));
+ remain = esl->signature_list_size - sizeof(struct efi_signature_list) -
+ esl->signature_header_size;
+ for (; remain > 0; remain -= esl->signature_size) {
+ char buf[37];
+ char *title;
+
+ if (num >= EFICONFIG_ENTRY_NUM_MAX - 1) {
+ ret = EFI_OUT_OF_RESOURCES;
+ goto out;
+ }
+
+ sg = calloc(1, sizeof(struct eficonfig_sig_data));
+ if (!sg) {
+ ret = EFI_OUT_OF_RESOURCES;
+ goto err;
+ }
+
+ snprintf(buf, sizeof(buf), "%pUL", &esd->signature_owner);
+ title = strdup(buf);
+ if (!title) {
+ free(sg);
+ ret = EFI_OUT_OF_RESOURCES;
+ goto err;
+ }
+
+ sg->esl = esl;
+ sg->esd = esd;
+ sg->varname = varname;
+ ret = eficonfig_append_menu_entry(efi_menu, title, func, sg);
+ if (ret != EFI_SUCCESS) {
+ free(sg);
+ free(title);
+ goto err;
+ }
+ esd = (struct efi_signature_data *)((u8 *)esd + esl->signature_size);
+ num++;
+ }
+
+ size -= esl->signature_list_size;
+ esl = (struct efi_signature_list *)((u8 *)esl + esl->signature_list_size);
+ }
+out:
+ ret = eficonfig_append_quit_entry(efi_menu);
+err:
+ return ret;
+}
+
+/**
+ * enumerate_and_show_signature_database() - enumerate and show the signature database
+ *
+ * @data: pointer to the data for each entry
+ * Return: status code
+ */
+static efi_status_t enumerate_and_show_signature_database(void *varname)
+{
+ void *db;
+ char buf[50];
+ efi_status_t ret;
+ efi_uintn_t db_size;
+ struct efimenu *efi_menu;
+ struct list_head *pos, *n;
+ struct eficonfig_entry *entry;
+
+ db = efi_get_var(varname, efi_auth_var_get_guid(varname), &db_size);
+ if (!db) {
+ eficonfig_print_msg("There is no entry in the signature database.");
+ return EFI_NOT_FOUND;
+ }
+
+ efi_menu = calloc(1, sizeof(struct efimenu));
+ if (!efi_menu) {
+ free(db);
+ return EFI_OUT_OF_RESOURCES;
+ }
+
+ ret = prepare_signature_list_menu(efi_menu, varname, db, db_size,
+ eficonfig_process_show_siglist);
+ if (ret != EFI_SUCCESS)
+ goto out;
+
+ snprintf(buf, sizeof(buf), " ** Show Signature Database (%ls) **", (u16 *)varname);
+ ret = eficonfig_process_common(efi_menu, buf);
+out:
+ list_for_each_safe(pos, n, &efi_menu->list) {
+ entry = list_entry(pos, struct eficonfig_entry, list);
+ free(entry->data);
+ }
+ eficonfig_destroy(efi_menu);
+ free(db);
+
+ return ret;
+}
+
+/**
+ * eficonfig_process_show_signature_database() - process show signature database
+ *
+ * @data: pointer to the data for each entry
+ * Return: status code
+ */
+static efi_status_t eficonfig_process_show_signature_database(void *data)
+{
+ efi_status_t ret;
+
+ while (1) {
+ ret = enumerate_and_show_signature_database(data);
+ if (ret != EFI_SUCCESS && ret != EFI_NOT_READY)
+ break;
+ }
+
+ /* return to the parent menu */
+ ret = (ret == EFI_ABORTED) ? EFI_NOT_READY : ret;
+
+ return ret;
+}
+
+static struct eficonfig_item key_config_menu_items[] = {
+ {"Enroll New Key", eficonfig_process_enroll_key},
+ {"Show Signature Database", eficonfig_process_show_signature_database},
+ {"Quit", eficonfig_process_quit},
+};
+
+/**
+ * eficonfig_process_set_secure_boot_key() - display the key configuration menu
+ *
+ * @data: pointer to the data for each entry
+ * Return: status code
+ */
+static efi_status_t eficonfig_process_set_secure_boot_key(void *data)
+{
+ u32 i;
+ efi_status_t ret;
+ char header_str[32];
+ struct efimenu *efi_menu;
+
+ for (i = 0; i < ARRAY_SIZE(key_config_menu_items); i++)
+ key_config_menu_items[i].data = data;
+
+ snprintf(header_str, sizeof(header_str), " ** Configure %ls **", (u16 *)data);
+
+ while (1) {
+ efi_menu = eficonfig_create_fixed_menu(key_config_menu_items,
+ ARRAY_SIZE(key_config_menu_items));
+
+ ret = eficonfig_process_common(efi_menu, header_str);
+ eficonfig_destroy(efi_menu);
+
+ if (ret == EFI_ABORTED)
+ break;
+ }
+
+ /* return to the parent menu */
+ ret = (ret == EFI_ABORTED) ? EFI_NOT_READY : ret;
+
+ return ret;
+}
+
+static const struct eficonfig_item secure_boot_menu_items[] = {
+ {"PK", eficonfig_process_set_secure_boot_key, u"PK"},
+ {"KEK", eficonfig_process_set_secure_boot_key, u"KEK"},
+ {"db", eficonfig_process_set_secure_boot_key, u"db"},
+ {"dbx", eficonfig_process_set_secure_boot_key, u"dbx"},
+ {"Quit", eficonfig_process_quit},
+};
+
+/**
+ * eficonfig_process_secure_boot_config() - display the key list menu
+ *
+ * @data: pointer to the data for each entry
+ * Return: status code
+ */
+efi_status_t eficonfig_process_secure_boot_config(void *data)
+{
+ efi_status_t ret;
+ struct efimenu *efi_menu;
+
+ while (1) {
+ char header_str[64];
+
+ snprintf(header_str, sizeof(header_str),
+ " ** UEFI Secure Boot Key Configuration (SecureBoot : %s) **",
+ (efi_secure_boot_enabled() ? "ON" : "OFF"));
+
+ efi_menu = eficonfig_create_fixed_menu(secure_boot_menu_items,
+ ARRAY_SIZE(secure_boot_menu_items));
+ if (!efi_menu) {
+ ret = EFI_OUT_OF_RESOURCES;
+ break;
+ }
+
+ ret = eficonfig_process_common(efi_menu, header_str);
+ eficonfig_destroy(efi_menu);
+
+ if (ret == EFI_ABORTED)
+ break;
+ }
+
+ /* return to the parent menu */
+ ret = (ret == EFI_ABORTED) ? EFI_NOT_READY : ret;
+
+ return ret;
+}
generated by cgit v1.2.3 (git 2.0.4) at 2025-08-04 07:52:41 +0000