mirror of
https://github.com/AsahiLinux/u-boot
synced 2024-12-17 16:53:06 +00:00
2957a1e224
The current tpm2_pcr_read is hardcoded using SHA256. Make the actual command to TPM configurable to use wider range of algorithms. The current command line is kept as is i.e limited to SHA-256 only. Signed-off-by: Ruchika Gupta <ruchika.gupta@linaro.org> Reviewed-by: Ilias Apalodimas <ilias.apalodimas@linaro.org>
671 lines
19 KiB
C
671 lines
19 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 <linux/bitops.h>
|
|
#include "tpm-utils.h"
|
|
|
|
u32 tpm2_startup(struct udevice *dev, 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(dev, command_v2, NULL, NULL);
|
|
if (ret && ret != TPM2_RC_INITIALIZE)
|
|
return ret;
|
|
|
|
return 0;
|
|
}
|
|
|
|
u32 tpm2_self_test(struct udevice *dev, 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(dev, command_v2, NULL, NULL);
|
|
}
|
|
|
|
u32 tpm2_clear(struct udevice *dev, u32 handle, const char *pw,
|
|
const ssize_t pw_sz)
|
|
{
|
|
/* Length of the message header, up to start of password */
|
|
uint offset = 27;
|
|
u8 command_v2[COMMAND_BUFFER_SIZE] = {
|
|
tpm_u16(TPM2_ST_SESSIONS), /* TAG */
|
|
tpm_u32(offset + 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) */
|
|
};
|
|
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(dev, command_v2, NULL, NULL);
|
|
}
|
|
|
|
u32 tpm2_nv_define_space(struct udevice *dev, u32 space_index,
|
|
size_t space_size, u32 nv_attributes,
|
|
const u8 *nv_policy, size_t nv_policy_size)
|
|
{
|
|
/*
|
|
* Calculate the offset of the nv_policy piece by adding each of the
|
|
* chunks below.
|
|
*/
|
|
uint offset = 10 + 8 + 13 + 14;
|
|
u8 command_v2[COMMAND_BUFFER_SIZE] = {
|
|
/* header 10 bytes */
|
|
tpm_u16(TPM2_ST_SESSIONS), /* TAG */
|
|
tpm_u32(offset + nv_policy_size),/* Length */
|
|
tpm_u32(TPM2_CC_NV_DEFINE_SPACE),/* Command code */
|
|
|
|
/* handles 8 bytes */
|
|
tpm_u32(TPM2_RH_PLATFORM), /* Primary platform seed */
|
|
|
|
/* session header 13 bytes */
|
|
tpm_u32(9), /* Header size */
|
|
tpm_u32(TPM2_RS_PW), /* Password authorisation */
|
|
tpm_u16(0), /* nonce_size */
|
|
0, /* session_attrs */
|
|
tpm_u16(0), /* auth_size */
|
|
|
|
/* message 14 bytes + policy */
|
|
tpm_u16(12 + nv_policy_size), /* size */
|
|
tpm_u32(space_index),
|
|
tpm_u16(TPM2_ALG_SHA256),
|
|
tpm_u32(nv_attributes),
|
|
tpm_u16(nv_policy_size),
|
|
/* nv_policy */
|
|
};
|
|
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, nv_policy, nv_policy_size);
|
|
if (ret)
|
|
return TPM_LIB_ERROR;
|
|
|
|
return tpm_sendrecv_command(dev, command_v2, NULL, NULL);
|
|
}
|
|
|
|
u32 tpm2_pcr_extend(struct udevice *dev, u32 index, u32 algorithm,
|
|
const u8 *digest, u32 digest_len)
|
|
{
|
|
/* Length of the message header, up to start of digest */
|
|
uint offset = 33;
|
|
u8 command_v2[COMMAND_BUFFER_SIZE] = {
|
|
tpm_u16(TPM2_ST_SESSIONS), /* TAG */
|
|
tpm_u32(offset + 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) */
|
|
|
|
/* hashes */
|
|
tpm_u32(1), /* Count (number of hashes) */
|
|
tpm_u16(algorithm), /* Algorithm of the hash */
|
|
/* STRING(digest) Digest */
|
|
};
|
|
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, digest_len);
|
|
if (ret)
|
|
return TPM_LIB_ERROR;
|
|
|
|
return tpm_sendrecv_command(dev, command_v2, NULL, NULL);
|
|
}
|
|
|
|
u32 tpm2_nv_read_value(struct udevice *dev, u32 index, void *data, u32 count)
|
|
{
|
|
u8 command_v2[COMMAND_BUFFER_SIZE] = {
|
|
/* header 10 bytes */
|
|
tpm_u16(TPM2_ST_SESSIONS), /* TAG */
|
|
tpm_u32(10 + 8 + 4 + 9 + 4), /* Length */
|
|
tpm_u32(TPM2_CC_NV_READ), /* Command code */
|
|
|
|
/* handles 8 bytes */
|
|
tpm_u32(TPM2_RH_PLATFORM), /* Primary platform seed */
|
|
tpm_u32(HR_NV_INDEX + index), /* Password authorisation */
|
|
|
|
/* 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_u16(count), /* Number of bytes */
|
|
tpm_u16(0), /* Offset */
|
|
};
|
|
size_t response_len = COMMAND_BUFFER_SIZE;
|
|
u8 response[COMMAND_BUFFER_SIZE];
|
|
int ret;
|
|
u16 tag;
|
|
u32 size, code;
|
|
|
|
ret = tpm_sendrecv_command(dev, command_v2, response, &response_len);
|
|
if (ret)
|
|
return log_msg_ret("read", ret);
|
|
if (unpack_byte_string(response, response_len, "wdds",
|
|
0, &tag, 2, &size, 6, &code,
|
|
16, data, count))
|
|
return TPM_LIB_ERROR;
|
|
|
|
return 0;
|
|
}
|
|
|
|
u32 tpm2_nv_write_value(struct udevice *dev, u32 index, const void *data,
|
|
u32 count)
|
|
{
|
|
struct tpm_chip_priv *priv = dev_get_uclass_priv(dev);
|
|
uint offset = 10 + 8 + 4 + 9 + 2;
|
|
uint len = offset + count + 2;
|
|
/* Use empty password auth if platform hierarchy is disabled */
|
|
u32 auth = priv->plat_hier_disabled ? HR_NV_INDEX + index :
|
|
TPM2_RH_PLATFORM;
|
|
u8 command_v2[COMMAND_BUFFER_SIZE] = {
|
|
/* header 10 bytes */
|
|
tpm_u16(TPM2_ST_SESSIONS), /* TAG */
|
|
tpm_u32(len), /* Length */
|
|
tpm_u32(TPM2_CC_NV_WRITE), /* Command code */
|
|
|
|
/* handles 8 bytes */
|
|
tpm_u32(auth), /* Primary platform seed */
|
|
tpm_u32(HR_NV_INDEX + index), /* Password authorisation */
|
|
|
|
/* 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_u16(count),
|
|
};
|
|
size_t response_len = COMMAND_BUFFER_SIZE;
|
|
u8 response[COMMAND_BUFFER_SIZE];
|
|
int ret;
|
|
|
|
ret = pack_byte_string(command_v2, sizeof(command_v2), "sw",
|
|
offset, data, count,
|
|
offset + count, 0);
|
|
if (ret)
|
|
return TPM_LIB_ERROR;
|
|
|
|
return tpm_sendrecv_command(dev, command_v2, response, &response_len);
|
|
}
|
|
|
|
u32 tpm2_pcr_read(struct udevice *dev, u32 idx, unsigned int idx_min_sz,
|
|
u16 algorithm, void *data, u32 digest_len,
|
|
unsigned int *updates)
|
|
{
|
|
u8 idx_array_sz = max(idx_min_sz, DIV_ROUND_UP(idx, 8));
|
|
u8 command_v2[COMMAND_BUFFER_SIZE] = {
|
|
tpm_u16(TPM2_ST_NO_SESSIONS), /* TAG */
|
|
tpm_u32(17 + idx_array_sz), /* Length */
|
|
tpm_u32(TPM2_CC_PCR_READ), /* Command code */
|
|
|
|
/* TPML_PCR_SELECTION */
|
|
tpm_u32(1), /* Number of selections */
|
|
tpm_u16(algorithm), /* Algorithm of the hash */
|
|
idx_array_sz, /* Array size for selection */
|
|
/* bitmap(idx) Selected PCR bitmap */
|
|
};
|
|
size_t response_len = COMMAND_BUFFER_SIZE;
|
|
u8 response[COMMAND_BUFFER_SIZE];
|
|
unsigned int pcr_sel_idx = idx / 8;
|
|
u8 pcr_sel_bit = BIT(idx % 8);
|
|
unsigned int counter = 0;
|
|
int ret;
|
|
|
|
if (pack_byte_string(command_v2, COMMAND_BUFFER_SIZE, "b",
|
|
17 + pcr_sel_idx, pcr_sel_bit))
|
|
return TPM_LIB_ERROR;
|
|
|
|
ret = tpm_sendrecv_command(dev, command_v2, response, &response_len);
|
|
if (ret)
|
|
return ret;
|
|
|
|
if (digest_len > response_len)
|
|
return TPM_LIB_ERROR;
|
|
|
|
if (unpack_byte_string(response, response_len, "ds",
|
|
10, &counter,
|
|
response_len - digest_len, data,
|
|
digest_len))
|
|
return TPM_LIB_ERROR;
|
|
|
|
if (updates)
|
|
*updates = counter;
|
|
|
|
return 0;
|
|
}
|
|
|
|
u32 tpm2_get_capability(struct udevice *dev, u32 capability, u32 property,
|
|
void *buf, size_t prop_count)
|
|
{
|
|
u8 command_v2[COMMAND_BUFFER_SIZE] = {
|
|
tpm_u16(TPM2_ST_NO_SESSIONS), /* TAG */
|
|
tpm_u32(22), /* Length */
|
|
tpm_u32(TPM2_CC_GET_CAPABILITY), /* Command code */
|
|
|
|
tpm_u32(capability), /* Capability */
|
|
tpm_u32(property), /* Property */
|
|
tpm_u32(prop_count), /* Property count */
|
|
};
|
|
u8 response[COMMAND_BUFFER_SIZE];
|
|
size_t response_len = COMMAND_BUFFER_SIZE;
|
|
unsigned int properties_off;
|
|
int ret;
|
|
|
|
ret = tpm_sendrecv_command(dev, command_v2, response, &response_len);
|
|
if (ret)
|
|
return ret;
|
|
|
|
/*
|
|
* In the response buffer, the properties are located after the:
|
|
* tag (u16), response size (u32), response code (u32),
|
|
* YES/NO flag (u8), TPM_CAP (u32).
|
|
*/
|
|
properties_off = sizeof(u16) + sizeof(u32) + sizeof(u32) +
|
|
sizeof(u8) + sizeof(u32);
|
|
memcpy(buf, &response[properties_off], response_len - properties_off);
|
|
|
|
return 0;
|
|
}
|
|
|
|
u32 tpm2_dam_reset(struct udevice *dev, 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_DAM_RESET), /* Command code */
|
|
|
|
/* HANDLE */
|
|
tpm_u32(TPM2_RH_LOCKOUT), /* 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(dev, command_v2, NULL, NULL);
|
|
}
|
|
|
|
u32 tpm2_dam_parameters(struct udevice *dev, const char *pw,
|
|
const ssize_t pw_sz, unsigned int max_tries,
|
|
unsigned int recovery_time,
|
|
unsigned int lockout_recovery)
|
|
{
|
|
u8 command_v2[COMMAND_BUFFER_SIZE] = {
|
|
tpm_u16(TPM2_ST_SESSIONS), /* TAG */
|
|
tpm_u32(27 + pw_sz + 12), /* Length */
|
|
tpm_u32(TPM2_CC_DAM_PARAMETERS), /* Command code */
|
|
|
|
/* HANDLE */
|
|
tpm_u32(TPM2_RH_LOCKOUT), /* 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) */
|
|
|
|
/* LOCKOUT PARAMETERS */
|
|
/* tpm_u32(max_tries) Max tries (0, always lock) */
|
|
/* tpm_u32(recovery_time) Recovery time (0, no lock) */
|
|
/* tpm_u32(lockout_recovery) Lockout recovery */
|
|
};
|
|
unsigned int offset = 27;
|
|
int ret;
|
|
|
|
/*
|
|
* Fill the command structure starting from the first buffer:
|
|
* - the password (if any)
|
|
* - max tries
|
|
* - recovery time
|
|
* - lockout recovery
|
|
*/
|
|
ret = pack_byte_string(command_v2, sizeof(command_v2), "sddd",
|
|
offset, pw, pw_sz,
|
|
offset + pw_sz, max_tries,
|
|
offset + pw_sz + 4, recovery_time,
|
|
offset + pw_sz + 8, lockout_recovery);
|
|
offset += pw_sz + 12;
|
|
if (ret)
|
|
return TPM_LIB_ERROR;
|
|
|
|
return tpm_sendrecv_command(dev, command_v2, NULL, NULL);
|
|
}
|
|
|
|
int tpm2_change_auth(struct udevice *dev, u32 handle, const char *newpw,
|
|
const ssize_t newpw_sz, const char *oldpw,
|
|
const ssize_t oldpw_sz)
|
|
{
|
|
unsigned int offset = 27;
|
|
u8 command_v2[COMMAND_BUFFER_SIZE] = {
|
|
tpm_u16(TPM2_ST_SESSIONS), /* TAG */
|
|
tpm_u32(offset + oldpw_sz + 2 + newpw_sz), /* Length */
|
|
tpm_u32(TPM2_CC_HIERCHANGEAUTH), /* Command code */
|
|
|
|
/* HANDLE */
|
|
tpm_u32(handle), /* TPM resource handle */
|
|
|
|
/* AUTH_SESSION */
|
|
tpm_u32(9 + oldpw_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(oldpw_sz) /* Size of <hmac/password> */
|
|
/* STRING(oldpw) <hmac/password> (if any) */
|
|
|
|
/* TPM2B_AUTH (TPM2B_DIGEST) */
|
|
/* tpm_u16(newpw_sz) Digest size, new pw length */
|
|
/* STRING(newpw) Digest buffer, new pw */
|
|
};
|
|
int ret;
|
|
|
|
/*
|
|
* Fill the command structure starting from the first buffer:
|
|
* - the old password (if any)
|
|
* - size of the new password
|
|
* - new password
|
|
*/
|
|
ret = pack_byte_string(command_v2, sizeof(command_v2), "sws",
|
|
offset, oldpw, oldpw_sz,
|
|
offset + oldpw_sz, newpw_sz,
|
|
offset + oldpw_sz + 2, newpw, newpw_sz);
|
|
offset += oldpw_sz + 2 + newpw_sz;
|
|
if (ret)
|
|
return TPM_LIB_ERROR;
|
|
|
|
return tpm_sendrecv_command(dev, command_v2, NULL, NULL);
|
|
}
|
|
|
|
u32 tpm2_pcr_setauthpolicy(struct udevice *dev, const char *pw,
|
|
const ssize_t pw_sz, u32 index, const char *key)
|
|
{
|
|
u8 command_v2[COMMAND_BUFFER_SIZE] = {
|
|
tpm_u16(TPM2_ST_SESSIONS), /* TAG */
|
|
tpm_u32(35 + pw_sz + TPM2_DIGEST_LEN), /* Length */
|
|
tpm_u32(TPM2_CC_PCR_SETAUTHPOL), /* Command code */
|
|
|
|
/* HANDLE */
|
|
tpm_u32(TPM2_RH_PLATFORM), /* 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) */
|
|
|
|
/* TPM2B_AUTH (TPM2B_DIGEST) */
|
|
/* tpm_u16(TPM2_DIGEST_LEN) Digest size length */
|
|
/* STRING(key) Digest buffer (PCR key) */
|
|
|
|
/* TPMI_ALG_HASH */
|
|
/* tpm_u16(TPM2_ALG_SHA256) Algorithm of the hash */
|
|
|
|
/* TPMI_DH_PCR */
|
|
/* tpm_u32(index), PCR Index */
|
|
};
|
|
unsigned int offset = 27;
|
|
int ret;
|
|
|
|
/*
|
|
* Fill the command structure starting from the first buffer:
|
|
* - the password (if any)
|
|
* - the PCR key length
|
|
* - the PCR key
|
|
* - the hash algorithm
|
|
* - the PCR index
|
|
*/
|
|
ret = pack_byte_string(command_v2, sizeof(command_v2), "swswd",
|
|
offset, pw, pw_sz,
|
|
offset + pw_sz, TPM2_DIGEST_LEN,
|
|
offset + pw_sz + 2, key, TPM2_DIGEST_LEN,
|
|
offset + pw_sz + 2 + TPM2_DIGEST_LEN,
|
|
TPM2_ALG_SHA256,
|
|
offset + pw_sz + 4 + TPM2_DIGEST_LEN, index);
|
|
offset += pw_sz + 2 + TPM2_DIGEST_LEN + 2 + 4;
|
|
if (ret)
|
|
return TPM_LIB_ERROR;
|
|
|
|
return tpm_sendrecv_command(dev, command_v2, NULL, NULL);
|
|
}
|
|
|
|
u32 tpm2_pcr_setauthvalue(struct udevice *dev, const char *pw,
|
|
const ssize_t pw_sz, u32 index, const char *key,
|
|
const ssize_t key_sz)
|
|
{
|
|
u8 command_v2[COMMAND_BUFFER_SIZE] = {
|
|
tpm_u16(TPM2_ST_SESSIONS), /* TAG */
|
|
tpm_u32(33 + pw_sz + TPM2_DIGEST_LEN), /* Length */
|
|
tpm_u32(TPM2_CC_PCR_SETAUTHVAL), /* Command code */
|
|
|
|
/* HANDLE */
|
|
tpm_u32(index), /* Handle (PCR Index) */
|
|
|
|
/* 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) */
|
|
|
|
/* TPM2B_DIGEST */
|
|
/* tpm_u16(key_sz) Key length */
|
|
/* STRING(key) Key */
|
|
};
|
|
unsigned int offset = 27;
|
|
int ret;
|
|
|
|
/*
|
|
* Fill the command structure starting from the first buffer:
|
|
* - the password (if any)
|
|
* - the number of digests, 1 in our case
|
|
* - the algorithm, sha256 in our case
|
|
* - the digest (64 bytes)
|
|
*/
|
|
ret = pack_byte_string(command_v2, sizeof(command_v2), "sws",
|
|
offset, pw, pw_sz,
|
|
offset + pw_sz, key_sz,
|
|
offset + pw_sz + 2, key, key_sz);
|
|
offset += pw_sz + 2 + key_sz;
|
|
if (ret)
|
|
return TPM_LIB_ERROR;
|
|
|
|
return tpm_sendrecv_command(dev, command_v2, NULL, NULL);
|
|
}
|
|
|
|
u32 tpm2_get_random(struct udevice *dev, void *data, u32 count)
|
|
{
|
|
const u8 command_v2[10] = {
|
|
tpm_u16(TPM2_ST_NO_SESSIONS),
|
|
tpm_u32(12),
|
|
tpm_u32(TPM2_CC_GET_RANDOM),
|
|
};
|
|
u8 buf[COMMAND_BUFFER_SIZE], response[COMMAND_BUFFER_SIZE];
|
|
|
|
const size_t data_size_offset = 10;
|
|
const size_t data_offset = 12;
|
|
size_t response_length = sizeof(response);
|
|
u32 data_size;
|
|
u8 *out = data;
|
|
|
|
while (count > 0) {
|
|
u32 this_bytes = min((size_t)count,
|
|
sizeof(response) - data_offset);
|
|
u32 err;
|
|
|
|
if (pack_byte_string(buf, sizeof(buf), "sw",
|
|
0, command_v2, sizeof(command_v2),
|
|
sizeof(command_v2), this_bytes))
|
|
return TPM_LIB_ERROR;
|
|
err = tpm_sendrecv_command(dev, buf, response,
|
|
&response_length);
|
|
if (err)
|
|
return err;
|
|
if (unpack_byte_string(response, response_length, "w",
|
|
data_size_offset, &data_size))
|
|
return TPM_LIB_ERROR;
|
|
if (data_size > this_bytes)
|
|
return TPM_LIB_ERROR;
|
|
if (unpack_byte_string(response, response_length, "s",
|
|
data_offset, out, data_size))
|
|
return TPM_LIB_ERROR;
|
|
|
|
count -= data_size;
|
|
out += data_size;
|
|
}
|
|
|
|
return 0;
|
|
}
|
|
|
|
u32 tpm2_write_lock(struct udevice *dev, u32 index)
|
|
{
|
|
u8 command_v2[COMMAND_BUFFER_SIZE] = {
|
|
/* header 10 bytes */
|
|
tpm_u16(TPM2_ST_SESSIONS), /* TAG */
|
|
tpm_u32(10 + 8 + 13), /* Length */
|
|
tpm_u32(TPM2_CC_NV_WRITELOCK), /* Command code */
|
|
|
|
/* handles 8 bytes */
|
|
tpm_u32(TPM2_RH_PLATFORM), /* Primary platform seed */
|
|
tpm_u32(HR_NV_INDEX + index), /* Password authorisation */
|
|
|
|
/* session header 9 bytes */
|
|
tpm_u32(9), /* Header size */
|
|
tpm_u32(TPM2_RS_PW), /* Password authorisation */
|
|
tpm_u16(0), /* nonce_size */
|
|
0, /* session_attrs */
|
|
tpm_u16(0), /* auth_size */
|
|
};
|
|
|
|
return tpm_sendrecv_command(dev, command_v2, NULL, NULL);
|
|
}
|
|
|
|
u32 tpm2_disable_platform_hierarchy(struct udevice *dev)
|
|
{
|
|
struct tpm_chip_priv *priv = dev_get_uclass_priv(dev);
|
|
u8 command_v2[COMMAND_BUFFER_SIZE] = {
|
|
/* header 10 bytes */
|
|
tpm_u16(TPM2_ST_SESSIONS), /* TAG */
|
|
tpm_u32(10 + 4 + 13 + 5), /* Length */
|
|
tpm_u32(TPM2_CC_HIER_CONTROL), /* Command code */
|
|
|
|
/* 4 bytes */
|
|
tpm_u32(TPM2_RH_PLATFORM), /* Primary platform seed */
|
|
|
|
/* session header 9 bytes */
|
|
tpm_u32(9), /* Header size */
|
|
tpm_u32(TPM2_RS_PW), /* Password authorisation */
|
|
tpm_u16(0), /* nonce_size */
|
|
0, /* session_attrs */
|
|
tpm_u16(0), /* auth_size */
|
|
|
|
/* payload 5 bytes */
|
|
tpm_u32(TPM2_RH_PLATFORM), /* Hierarchy to disable */
|
|
0, /* 0=disable */
|
|
};
|
|
int ret;
|
|
|
|
ret = tpm_sendrecv_command(dev, command_v2, NULL, NULL);
|
|
log_info("ret=%s, %x\n", dev->name, ret);
|
|
if (ret)
|
|
return ret;
|
|
|
|
priv->plat_hier_disabled = true;
|
|
|
|
return 0;
|
|
}
|
|
|
|
u32 tpm2_submit_command(struct udevice *dev, const u8 *sendbuf,
|
|
u8 *recvbuf, size_t *recv_size)
|
|
{
|
|
return tpm_sendrecv_command(dev, sendbuf, recvbuf, recv_size);
|
|
}
|