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Merge tag 'tpm-030822' of https://source.denx.de/u-boot/custodians/u-boot-tpm

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EFI_RNG_PROTOCOL with a TPM
This commit is contained in:
Tom Rini
2022-08-05 08:01:32 -04:00
parent ea2997ed2d de70619dd3
commit 46b5c8ed01
13 changed files with 213 additions and 82 deletions
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1
cmd/Kconfig
View File

@@ -1964,6 +1964,7 @@ config CMD_GETTIME
config CMD_RNG
bool "rng command"
depends on DM_RNG
default y if SANDBOX
select HEXDUMP
help
Print bytes from the hardware random number generator.

42
cmd/rng.c
View File

@@ -13,24 +13,38 @@
static int do_rng(struct cmd_tbl *cmdtp, int flag, int argc, char *const argv[])
{
size_t n = 0x40;
size_t n;
u8 buf[64];
int devnum;
struct udevice *dev;
void *buf;
int ret = CMD_RET_SUCCESS;
if (uclass_get_device(UCLASS_RNG, 0, &dev) || !dev) {
switch (argc) {
case 1:
devnum = 0;
n = 0x40;
break;
case 2:
devnum = hextoul(argv[1], NULL);
n = 0x40;
break;
case 3:
devnum = hextoul(argv[1], NULL);
n = hextoul(argv[2], NULL);
break;
default:
return CMD_RET_USAGE;
}
if (uclass_get_device_by_seq(UCLASS_RNG, devnum, &dev) || !dev) {
printf("No RNG device\n");
return CMD_RET_FAILURE;
}
if (argc >= 2)
n = hextoul(argv[1], NULL);
if (!n)
return 0;
buf = malloc(n);
if (!buf) {
printf("Out of memory\n");
return CMD_RET_FAILURE;
}
n = min(n, sizeof(buf));
if (dm_rng_read(dev, buf, n)) {
printf("Reading RNG failed\n");
@@ -39,19 +53,17 @@ static int do_rng(struct cmd_tbl *cmdtp, int flag, int argc, char *const argv[])
print_hex_dump_bytes("", DUMP_PREFIX_OFFSET, buf, n);
}
free(buf);
return ret;
}
#ifdef CONFIG_SYS_LONGHELP
static char rng_help_text[] =
"[n]\n"
" - print n random bytes\n";
"[dev [n]]\n"
" - print n random bytes(max 64) read from dev\n";
#endif
U_BOOT_CMD(
rng, 2, 0, do_rng,
rng, 3, 0, do_rng,
"print bytes from the hardware random number generator",
rng_help_text
);