eficonfig: add "Show Signature Database" menu entry

This commit adds the menu-driven interface to show the
signature list content.

Signed-off-by: Masahisa Kojima <masahisa.kojima@linaro.org>
Acked-by: Ilias Apalodimas <ilias.apalodimas@linaro.org>
This commit is contained in:
Masahisa Kojima 2022-11-20 09:21:19 +09:00 committed by Heinrich Schuchardt
parent c3b5af63d1
commit d0f9ae35fb

View file

@ -17,6 +17,13 @@
#include <efi_variable.h> #include <efi_variable.h>
#include <crypto/pkcs7_parser.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 { enum efi_sbkey_signature_type {
SIG_TYPE_X509 = 0, SIG_TYPE_X509 = 0,
SIG_TYPE_HASH, SIG_TYPE_HASH,
@ -176,8 +183,236 @@ out:
return 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[] = { static struct eficonfig_item key_config_menu_items[] = {
{"Enroll New Key", eficonfig_process_enroll_key}, {"Enroll New Key", eficonfig_process_enroll_key},
{"Show Signature Database", eficonfig_process_show_signature_database},
{"Quit", eficonfig_process_quit}, {"Quit", eficonfig_process_quit},
}; };