mirror of
https://github.com/u-boot/u-boot.git
synced 2024-11-26 05:34:30 +08:00
c670aeee3d
The sandbox is built with the SDL2 library with invokes the X11 library
which in turn calls getc(). But getc() in glibc is defined as
int getc(FILE *)
This does not match our definition.
int getc(void)
The sandbox crashes when called with parameter -l.
Rename our library symbol getc() to getchar().
Signed-off-by: Heinrich Schuchardt <xypron.glpk@gmx.de>
Reviewed-by: Tom Rini <trini@konsulko.com>
Reviewed-by: Simon Glass <sjg@chromium.org>
389 lines
8.9 KiB
C
389 lines
8.9 KiB
C
// SPDX-License-Identifier: GPL-2.0+
|
|
/*
|
|
* (C) Copyright 2000
|
|
* Wolfgang Denk, DENX Software Engineering, wd@denx.de.
|
|
*/
|
|
|
|
#include <common.h>
|
|
#include <autoboot.h>
|
|
#include <bootretry.h>
|
|
#include <cli.h>
|
|
#include <command.h>
|
|
#include <console.h>
|
|
#include <env.h>
|
|
#include <fdtdec.h>
|
|
#include <hash.h>
|
|
#include <log.h>
|
|
#include <malloc.h>
|
|
#include <memalign.h>
|
|
#include <menu.h>
|
|
#include <post.h>
|
|
#include <time.h>
|
|
#include <linux/delay.h>
|
|
#include <u-boot/sha256.h>
|
|
#include <bootcount.h>
|
|
|
|
DECLARE_GLOBAL_DATA_PTR;
|
|
|
|
#define MAX_DELAY_STOP_STR 32
|
|
|
|
#ifndef DEBUG_BOOTKEYS
|
|
#define DEBUG_BOOTKEYS 0
|
|
#endif
|
|
#define debug_bootkeys(fmt, args...) \
|
|
debug_cond(DEBUG_BOOTKEYS, fmt, ##args)
|
|
|
|
/* Stored value of bootdelay, used by autoboot_command() */
|
|
static int stored_bootdelay;
|
|
static int menukey;
|
|
|
|
#ifdef CONFIG_AUTOBOOT_ENCRYPTION
|
|
#define AUTOBOOT_STOP_STR_SHA256 CONFIG_AUTOBOOT_STOP_STR_SHA256
|
|
#else
|
|
#define AUTOBOOT_STOP_STR_SHA256 ""
|
|
#endif
|
|
|
|
#ifdef CONFIG_USE_AUTOBOOT_MENUKEY
|
|
#define AUTOBOOT_MENUKEY CONFIG_USE_AUTOBOOT_MENUKEY
|
|
#else
|
|
#define AUTOBOOT_MENUKEY 0
|
|
#endif
|
|
|
|
/*
|
|
* Use a "constant-length" time compare function for this
|
|
* hash compare:
|
|
*
|
|
* https://crackstation.net/hashing-security.htm
|
|
*/
|
|
static int slow_equals(u8 *a, u8 *b, int len)
|
|
{
|
|
int diff = 0;
|
|
int i;
|
|
|
|
for (i = 0; i < len; i++)
|
|
diff |= a[i] ^ b[i];
|
|
|
|
return diff == 0;
|
|
}
|
|
|
|
/**
|
|
* passwd_abort_sha256() - check for a hashed key sequence to abort booting
|
|
*
|
|
* This checks for the user entering a SHA256 hash within a given time.
|
|
*
|
|
* @etime: Timeout value ticks (stop when get_ticks() reachs this)
|
|
* @return 0 if autoboot should continue, 1 if it should stop
|
|
*/
|
|
static int passwd_abort_sha256(uint64_t etime)
|
|
{
|
|
const char *sha_env_str = env_get("bootstopkeysha256");
|
|
u8 sha_env[SHA256_SUM_LEN];
|
|
u8 *sha;
|
|
char *presskey;
|
|
const char *algo_name = "sha256";
|
|
u_int presskey_len = 0;
|
|
int abort = 0;
|
|
int size = sizeof(sha);
|
|
int ret;
|
|
|
|
if (sha_env_str == NULL)
|
|
sha_env_str = AUTOBOOT_STOP_STR_SHA256;
|
|
|
|
/*
|
|
* Generate the binary value from the environment hash value
|
|
* so that we can compare this value with the computed hash
|
|
* from the user input
|
|
*/
|
|
ret = hash_parse_string(algo_name, sha_env_str, sha_env);
|
|
if (ret) {
|
|
printf("Hash %s not supported!\n", algo_name);
|
|
return 0;
|
|
}
|
|
|
|
presskey = malloc_cache_aligned(MAX_DELAY_STOP_STR);
|
|
sha = malloc_cache_aligned(SHA256_SUM_LEN);
|
|
size = SHA256_SUM_LEN;
|
|
/*
|
|
* We don't know how long the stop-string is, so we need to
|
|
* generate the sha256 hash upon each input character and
|
|
* compare the value with the one saved in the environment
|
|
*/
|
|
do {
|
|
if (tstc()) {
|
|
/* Check for input string overflow */
|
|
if (presskey_len >= MAX_DELAY_STOP_STR) {
|
|
free(presskey);
|
|
free(sha);
|
|
return 0;
|
|
}
|
|
|
|
presskey[presskey_len++] = getchar();
|
|
|
|
/* Calculate sha256 upon each new char */
|
|
hash_block(algo_name, (const void *)presskey,
|
|
presskey_len, sha, &size);
|
|
|
|
/* And check if sha matches saved value in env */
|
|
if (slow_equals(sha, sha_env, SHA256_SUM_LEN))
|
|
abort = 1;
|
|
}
|
|
} while (!abort && get_ticks() <= etime);
|
|
|
|
free(presskey);
|
|
free(sha);
|
|
return abort;
|
|
}
|
|
|
|
/**
|
|
* passwd_abort_key() - check for a key sequence to aborted booting
|
|
*
|
|
* This checks for the user entering a string within a given time.
|
|
*
|
|
* @etime: Timeout value ticks (stop when get_ticks() reachs this)
|
|
* @return 0 if autoboot should continue, 1 if it should stop
|
|
*/
|
|
static int passwd_abort_key(uint64_t etime)
|
|
{
|
|
int abort = 0;
|
|
struct {
|
|
char *str;
|
|
u_int len;
|
|
int retry;
|
|
}
|
|
delaykey[] = {
|
|
{ .str = env_get("bootdelaykey"), .retry = 1 },
|
|
{ .str = env_get("bootstopkey"), .retry = 0 },
|
|
};
|
|
|
|
char presskey[MAX_DELAY_STOP_STR];
|
|
u_int presskey_len = 0;
|
|
u_int presskey_max = 0;
|
|
u_int i;
|
|
|
|
# ifdef CONFIG_AUTOBOOT_DELAY_STR
|
|
if (delaykey[0].str == NULL)
|
|
delaykey[0].str = CONFIG_AUTOBOOT_DELAY_STR;
|
|
# endif
|
|
# ifdef CONFIG_AUTOBOOT_STOP_STR
|
|
if (delaykey[1].str == NULL)
|
|
delaykey[1].str = CONFIG_AUTOBOOT_STOP_STR;
|
|
# endif
|
|
|
|
for (i = 0; i < sizeof(delaykey) / sizeof(delaykey[0]); i++) {
|
|
delaykey[i].len = delaykey[i].str == NULL ?
|
|
0 : strlen(delaykey[i].str);
|
|
delaykey[i].len = delaykey[i].len > MAX_DELAY_STOP_STR ?
|
|
MAX_DELAY_STOP_STR : delaykey[i].len;
|
|
|
|
presskey_max = presskey_max > delaykey[i].len ?
|
|
presskey_max : delaykey[i].len;
|
|
|
|
debug_bootkeys("%s key:<%s>\n",
|
|
delaykey[i].retry ? "delay" : "stop",
|
|
delaykey[i].str ? delaykey[i].str : "NULL");
|
|
}
|
|
|
|
/* In order to keep up with incoming data, check timeout only
|
|
* when catch up.
|
|
*/
|
|
do {
|
|
if (tstc()) {
|
|
if (presskey_len < presskey_max) {
|
|
presskey[presskey_len++] = getchar();
|
|
} else {
|
|
for (i = 0; i < presskey_max - 1; i++)
|
|
presskey[i] = presskey[i + 1];
|
|
|
|
presskey[i] = getchar();
|
|
}
|
|
}
|
|
|
|
for (i = 0; i < sizeof(delaykey) / sizeof(delaykey[0]); i++) {
|
|
if (delaykey[i].len > 0 &&
|
|
presskey_len >= delaykey[i].len &&
|
|
memcmp(presskey + presskey_len -
|
|
delaykey[i].len, delaykey[i].str,
|
|
delaykey[i].len) == 0) {
|
|
debug_bootkeys("got %skey\n",
|
|
delaykey[i].retry ? "delay" :
|
|
"stop");
|
|
|
|
/* don't retry auto boot */
|
|
if (!delaykey[i].retry)
|
|
bootretry_dont_retry();
|
|
abort = 1;
|
|
}
|
|
}
|
|
} while (!abort && get_ticks() <= etime);
|
|
|
|
return abort;
|
|
}
|
|
|
|
/***************************************************************************
|
|
* Watch for 'delay' seconds for autoboot stop or autoboot delay string.
|
|
* returns: 0 - no key string, allow autoboot 1 - got key string, abort
|
|
*/
|
|
static int abortboot_key_sequence(int bootdelay)
|
|
{
|
|
int abort;
|
|
uint64_t etime = endtick(bootdelay);
|
|
|
|
# ifdef CONFIG_AUTOBOOT_PROMPT
|
|
/*
|
|
* CONFIG_AUTOBOOT_PROMPT includes the %d for all boards.
|
|
* To print the bootdelay value upon bootup.
|
|
*/
|
|
printf(CONFIG_AUTOBOOT_PROMPT, bootdelay);
|
|
# endif
|
|
|
|
if (IS_ENABLED(CONFIG_AUTOBOOT_ENCRYPTION))
|
|
abort = passwd_abort_sha256(etime);
|
|
else
|
|
abort = passwd_abort_key(etime);
|
|
if (!abort)
|
|
debug_bootkeys("key timeout\n");
|
|
|
|
return abort;
|
|
}
|
|
|
|
static int abortboot_single_key(int bootdelay)
|
|
{
|
|
int abort = 0;
|
|
unsigned long ts;
|
|
|
|
printf("Hit any key to stop autoboot: %2d ", bootdelay);
|
|
|
|
/*
|
|
* Check if key already pressed
|
|
*/
|
|
if (tstc()) { /* we got a key press */
|
|
getchar(); /* consume input */
|
|
puts("\b\b\b 0");
|
|
abort = 1; /* don't auto boot */
|
|
}
|
|
|
|
while ((bootdelay > 0) && (!abort)) {
|
|
--bootdelay;
|
|
/* delay 1000 ms */
|
|
ts = get_timer(0);
|
|
do {
|
|
if (tstc()) { /* we got a key press */
|
|
int key;
|
|
|
|
abort = 1; /* don't auto boot */
|
|
bootdelay = 0; /* no more delay */
|
|
key = getchar();/* consume input */
|
|
if (IS_ENABLED(CONFIG_USE_AUTOBOOT_MENUKEY))
|
|
menukey = key;
|
|
break;
|
|
}
|
|
udelay(10000);
|
|
} while (!abort && get_timer(ts) < 1000);
|
|
|
|
printf("\b\b\b%2d ", bootdelay);
|
|
}
|
|
|
|
putc('\n');
|
|
|
|
return abort;
|
|
}
|
|
|
|
static int abortboot(int bootdelay)
|
|
{
|
|
int abort = 0;
|
|
|
|
if (bootdelay >= 0) {
|
|
if (IS_ENABLED(CONFIG_AUTOBOOT_KEYED))
|
|
abort = abortboot_key_sequence(bootdelay);
|
|
else
|
|
abort = abortboot_single_key(bootdelay);
|
|
}
|
|
|
|
if (IS_ENABLED(CONFIG_SILENT_CONSOLE) && abort)
|
|
gd->flags &= ~GD_FLG_SILENT;
|
|
|
|
return abort;
|
|
}
|
|
|
|
static void process_fdt_options(const void *blob)
|
|
{
|
|
#ifdef CONFIG_SYS_TEXT_BASE
|
|
ulong addr;
|
|
|
|
/* Add an env variable to point to a kernel payload, if available */
|
|
addr = fdtdec_get_config_int(gd->fdt_blob, "kernel-offset", 0);
|
|
if (addr)
|
|
env_set_addr("kernaddr", (void *)(CONFIG_SYS_TEXT_BASE + addr));
|
|
|
|
/* Add an env variable to point to a root disk, if available */
|
|
addr = fdtdec_get_config_int(gd->fdt_blob, "rootdisk-offset", 0);
|
|
if (addr)
|
|
env_set_addr("rootaddr", (void *)(CONFIG_SYS_TEXT_BASE + addr));
|
|
#endif /* CONFIG_SYS_TEXT_BASE */
|
|
}
|
|
|
|
const char *bootdelay_process(void)
|
|
{
|
|
char *s;
|
|
int bootdelay;
|
|
|
|
bootcount_inc();
|
|
|
|
s = env_get("bootdelay");
|
|
bootdelay = s ? (int)simple_strtol(s, NULL, 10) : CONFIG_BOOTDELAY;
|
|
|
|
if (IS_ENABLED(CONFIG_OF_CONTROL))
|
|
bootdelay = fdtdec_get_config_int(gd->fdt_blob, "bootdelay",
|
|
bootdelay);
|
|
|
|
debug("### main_loop entered: bootdelay=%d\n\n", bootdelay);
|
|
|
|
if (IS_ENABLED(CONFIG_AUTOBOOT_MENU_SHOW))
|
|
bootdelay = menu_show(bootdelay);
|
|
bootretry_init_cmd_timeout();
|
|
|
|
#ifdef CONFIG_POST
|
|
if (gd->flags & GD_FLG_POSTFAIL) {
|
|
s = env_get("failbootcmd");
|
|
} else
|
|
#endif /* CONFIG_POST */
|
|
if (bootcount_error())
|
|
s = env_get("altbootcmd");
|
|
else
|
|
s = env_get("bootcmd");
|
|
|
|
if (IS_ENABLED(CONFIG_OF_CONTROL))
|
|
process_fdt_options(gd->fdt_blob);
|
|
stored_bootdelay = bootdelay;
|
|
|
|
return s;
|
|
}
|
|
|
|
void autoboot_command(const char *s)
|
|
{
|
|
debug("### main_loop: bootcmd=\"%s\"\n", s ? s : "<UNDEFINED>");
|
|
|
|
if (s && (stored_bootdelay == -2 ||
|
|
(stored_bootdelay != -1 && !abortboot(stored_bootdelay)))) {
|
|
bool lock;
|
|
int prev;
|
|
|
|
lock = IS_ENABLED(CONFIG_AUTOBOOT_KEYED) &&
|
|
!IS_ENABLED(CONFIG_AUTOBOOT_KEYED_CTRLC);
|
|
if (lock)
|
|
prev = disable_ctrlc(1); /* disable Ctrl-C checking */
|
|
|
|
run_command_list(s, -1, 0);
|
|
|
|
if (lock)
|
|
disable_ctrlc(prev); /* restore Ctrl-C checking */
|
|
}
|
|
|
|
if (IS_ENABLED(CONFIG_USE_AUTOBOOT_MENUKEY) &&
|
|
menukey == AUTOBOOT_MENUKEY) {
|
|
s = env_get("menucmd");
|
|
if (s)
|
|
run_command_list(s, -1, 0);
|
|
}
|
|
}
|