mirror of
https://github.com/AsahiLinux/u-boot
synced 2024-11-10 23:24:38 +00:00
6284be5a90
Add support for the TPM2_PCR_Extend command. Change the command file and the help accordingly. Signed-off-by: Miquel Raynal <miquel.raynal@bootlin.com> Reviewed-by: Simon Glass <sjg@chromium.org> Reviewed-by: Tom Rini <trini@konsulko.com>
117 lines
2.9 KiB
C
117 lines
2.9 KiB
C
// SPDX-License-Identifier: GPL-2.0+
|
|
/*
|
|
* Copyright (c) 2018 Bootlin
|
|
* Author: Miquel Raynal <miquel.raynal@bootlin.com>
|
|
*/
|
|
|
|
#include <common.h>
|
|
#include <dm.h>
|
|
#include <tpm-common.h>
|
|
#include <tpm-v2.h>
|
|
#include "tpm-utils.h"
|
|
|
|
u32 tpm2_startup(enum tpm2_startup_types mode)
|
|
{
|
|
const u8 command_v2[12] = {
|
|
tpm_u16(TPM2_ST_NO_SESSIONS),
|
|
tpm_u32(12),
|
|
tpm_u32(TPM2_CC_STARTUP),
|
|
tpm_u16(mode),
|
|
};
|
|
int ret;
|
|
|
|
/*
|
|
* Note TPM2_Startup command will return RC_SUCCESS the first time,
|
|
* but will return RC_INITIALIZE otherwise.
|
|
*/
|
|
ret = tpm_sendrecv_command(command_v2, NULL, NULL);
|
|
if (ret && ret != TPM2_RC_INITIALIZE)
|
|
return ret;
|
|
|
|
return 0;
|
|
}
|
|
|
|
u32 tpm2_self_test(enum tpm2_yes_no full_test)
|
|
{
|
|
const u8 command_v2[12] = {
|
|
tpm_u16(TPM2_ST_NO_SESSIONS),
|
|
tpm_u32(11),
|
|
tpm_u32(TPM2_CC_SELF_TEST),
|
|
full_test,
|
|
};
|
|
|
|
return tpm_sendrecv_command(command_v2, NULL, NULL);
|
|
}
|
|
|
|
u32 tpm2_clear(u32 handle, const char *pw, const ssize_t pw_sz)
|
|
{
|
|
u8 command_v2[COMMAND_BUFFER_SIZE] = {
|
|
tpm_u16(TPM2_ST_SESSIONS), /* TAG */
|
|
tpm_u32(27 + pw_sz), /* Length */
|
|
tpm_u32(TPM2_CC_CLEAR), /* Command code */
|
|
|
|
/* HANDLE */
|
|
tpm_u32(handle), /* TPM resource handle */
|
|
|
|
/* AUTH_SESSION */
|
|
tpm_u32(9 + pw_sz), /* Authorization size */
|
|
tpm_u32(TPM2_RS_PW), /* Session handle */
|
|
tpm_u16(0), /* Size of <nonce> */
|
|
/* <nonce> (if any) */
|
|
0, /* Attributes: Cont/Excl/Rst */
|
|
tpm_u16(pw_sz), /* Size of <hmac/password> */
|
|
/* STRING(pw) <hmac/password> (if any) */
|
|
};
|
|
unsigned int offset = 27;
|
|
int ret;
|
|
|
|
/*
|
|
* Fill the command structure starting from the first buffer:
|
|
* - the password (if any)
|
|
*/
|
|
ret = pack_byte_string(command_v2, sizeof(command_v2), "s",
|
|
offset, pw, pw_sz);
|
|
offset += pw_sz;
|
|
if (ret)
|
|
return TPM_LIB_ERROR;
|
|
|
|
return tpm_sendrecv_command(command_v2, NULL, NULL);
|
|
}
|
|
|
|
u32 tpm2_pcr_extend(u32 index, const uint8_t *digest)
|
|
{
|
|
u8 command_v2[COMMAND_BUFFER_SIZE] = {
|
|
tpm_u16(TPM2_ST_SESSIONS), /* TAG */
|
|
tpm_u32(33 + TPM2_DIGEST_LEN), /* Length */
|
|
tpm_u32(TPM2_CC_PCR_EXTEND), /* Command code */
|
|
|
|
/* HANDLE */
|
|
tpm_u32(index), /* Handle (PCR Index) */
|
|
|
|
/* AUTH_SESSION */
|
|
tpm_u32(9), /* Authorization size */
|
|
tpm_u32(TPM2_RS_PW), /* Session handle */
|
|
tpm_u16(0), /* Size of <nonce> */
|
|
/* <nonce> (if any) */
|
|
0, /* Attributes: Cont/Excl/Rst */
|
|
tpm_u16(0), /* Size of <hmac/password> */
|
|
/* <hmac/password> (if any) */
|
|
tpm_u32(1), /* Count (number of hashes) */
|
|
tpm_u16(TPM2_ALG_SHA256), /* Algorithm of the hash */
|
|
/* STRING(digest) Digest */
|
|
};
|
|
unsigned int offset = 33;
|
|
int ret;
|
|
|
|
/*
|
|
* Fill the command structure starting from the first buffer:
|
|
* - the digest
|
|
*/
|
|
ret = pack_byte_string(command_v2, sizeof(command_v2), "s",
|
|
offset, digest, TPM2_DIGEST_LEN);
|
|
offset += TPM2_DIGEST_LEN;
|
|
if (ret)
|
|
return TPM_LIB_ERROR;
|
|
|
|
return tpm_sendrecv_command(command_v2, NULL, NULL);
|
|
}
|