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tpm: export tpm2_flush_context_cmd

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Signed-off-by: Jarkko Sakkinen <jarkko.sakkinen@linux.intel.com>
Tested-by: James Bottomley <James.Bottomley@HansenPartnership.com>
Reviewed-by: James Bottomley <James.Bottomley@HansenPartnership.com>
This commit is contained in:
Jarkko Sakkinen 2016-11-26 13:39:35 +02:00
parent a147918e79
commit 9aa36b399a
2 changed files with 31 additions and 33 deletions
repo.diff.show_diff_stats Download patch file Download diff file Expand all files Collapse all files

2
drivers/char/tpm/tpm.h
View file

@ -541,6 +541,8 @@ int tpm2_pcr_read(struct tpm_chip *chip, int pcr_idx, u8 *res_buf);
int tpm2_pcr_extend(struct tpm_chip *chip, int pcr_idx, u32 count,
struct tpm2_digest *digests);
int tpm2_get_random(struct tpm_chip *chip, u8 *out, size_t max);
void tpm2_flush_context_cmd(struct tpm_chip *chip, u32 handle,
unsigned int flags);
int tpm2_seal_trusted(struct tpm_chip *chip,
struct trusted_key_payload *payload,
struct trusted_key_options *options);

62
drivers/char/tpm/tpm2-cmd.c
View file

@ -418,6 +418,35 @@ static const struct tpm_input_header tpm2_get_tpm_pt_header = {
.ordinal = cpu_to_be32(TPM2_CC_GET_CAPABILITY)
};
/**
* tpm2_flush_context_cmd() - execute a TPM2_FlushContext command
* @chip: TPM chip to use
* @payload: the key data in clear and encrypted form
* @options: authentication values and other options
*
* Return: same as with tpm_transmit_cmd
*/
void tpm2_flush_context_cmd(struct tpm_chip *chip, u32 handle,
unsigned int flags)
{
struct tpm_buf buf;
int rc;
rc = tpm_buf_init(&buf, TPM2_ST_NO_SESSIONS, TPM2_CC_FLUSH_CONTEXT);
if (rc) {
dev_warn(&chip->dev, "0x%08x was not flushed, out of memory\n",
handle);
return;
}
tpm_buf_append_u32(&buf, handle);
(void) tpm_transmit_cmd(chip, buf.data, PAGE_SIZE, 0, flags,
"flushing context");
tpm_buf_destroy(&buf);
}
/**
* tpm_buf_append_auth() - append TPMS_AUTH_COMMAND to the buffer.
*
@ -627,39 +656,6 @@ static int tpm2_load_cmd(struct tpm_chip *chip,
return rc;
}
/**
* tpm2_flush_context_cmd() - execute a TPM2_FlushContext command
*
* @chip: TPM chip to use
* @handle: the key data in clear and encrypted form
* @flags: tpm transmit flags
*
* Return: Same as with tpm_transmit_cmd.
*/
static void tpm2_flush_context_cmd(struct tpm_chip *chip, u32 handle,
unsigned int flags)
{
struct tpm_buf buf;
int rc;
rc = tpm_buf_init(&buf, TPM2_ST_NO_SESSIONS, TPM2_CC_FLUSH_CONTEXT);
if (rc) {
dev_warn(&chip->dev, "0x%08x was not flushed, out of memory\n",
handle);
return;
}
tpm_buf_append_u32(&buf, handle);
rc = tpm_transmit_cmd(chip, buf.data, PAGE_SIZE, 0, flags,
"flushing context");
if (rc)
dev_warn(&chip->dev, "0x%08x was not flushed, rc=%d\n", handle,
rc);
tpm_buf_destroy(&buf);
}
/**
* tpm2_unseal_cmd() - execute a TPM2_Unload command
*