From: Roberto Sassu <roberto.sassu@huawei.com>
To: tpmdd-devel@lists.sourceforge.net
Cc: linux-ima-devel@lists.sourceforge.net,
linux-security-module@vger.kernel.org,
linux-kernel@vger.kernel.org,
Roberto Sassu <roberto.sassu@huawei.com>
Subject: [PATCH 2/2] tpm: use tpm2_pcr_read() in tpm2_do_selftest()
Date: Fri, 23 Jun 2017 15:41:57 +0200 [thread overview]
Message-ID: <20170623134157.30399-3-roberto.sassu@huawei.com> (raw)
In-Reply-To: <20170623134157.30399-1-roberto.sassu@huawei.com>
tpm2_do_selftest() performs a PCR read during the TPM initialization phase.
This patch replaces the PCR read code with a call to tpm2_pcr_read().
Signed-off-by: Roberto Sassu <roberto.sassu@huawei.com>
---
drivers/char/tpm/tpm2-cmd.c | 31 +------------------------------
1 file changed, 1 insertion(+), 30 deletions(-)
diff --git a/drivers/char/tpm/tpm2-cmd.c b/drivers/char/tpm/tpm2-cmd.c
index fdce77d..2d6ee0c 100644
--- a/drivers/char/tpm/tpm2-cmd.c
+++ b/drivers/char/tpm/tpm2-cmd.c
@@ -35,13 +35,6 @@ struct tpm2_self_test_in {
u8 full_test;
} __packed;
-struct tpm2_pcr_read_in {
- __be32 pcr_selects_cnt;
- __be16 hash_alg;
- u8 pcr_select_size;
- u8 pcr_select[TPM2_PCR_SELECT_MIN];
-} __packed;
-
struct tpm2_get_tpm_pt_in {
__be32 cap_id;
__be32 property_id;
@@ -68,7 +61,6 @@ struct tpm2_get_random_out {
union tpm2_cmd_params {
struct tpm2_startup_in startup_in;
struct tpm2_self_test_in selftest_in;
- struct tpm2_pcr_read_in pcrread_in;
struct tpm2_get_tpm_pt_in get_tpm_pt_in;
struct tpm2_get_tpm_pt_out get_tpm_pt_out;
struct tpm2_get_random_in getrandom_in;
@@ -215,16 +207,6 @@ static const u8 tpm2_ordinal_duration[TPM2_CC_LAST - TPM2_CC_FIRST + 1] = {
TPM_UNDEFINED /* 18f */
};
-#define TPM2_PCR_READ_IN_SIZE \
- (sizeof(struct tpm_input_header) + \
- sizeof(struct tpm2_pcr_read_in))
-
-static const struct tpm_input_header tpm2_pcrread_header = {
- .tag = cpu_to_be16(TPM2_ST_NO_SESSIONS),
- .length = cpu_to_be32(TPM2_PCR_READ_IN_SIZE),
- .ordinal = cpu_to_be32(TPM2_CC_PCR_READ)
-};
-
struct tpm2_pcr_read_out {
__be32 update_cnt;
__be32 pcr_selects_cnt;
@@ -928,7 +910,6 @@ static int tpm2_do_selftest(struct tpm_chip *chip)
unsigned int loops;
unsigned int delay_msec = 100;
unsigned long duration;
- struct tpm2_cmd cmd;
int i;
duration = tpm2_calc_ordinal_duration(chip, TPM2_CC_SELF_TEST);
@@ -941,20 +922,10 @@ static int tpm2_do_selftest(struct tpm_chip *chip)
for (i = 0; i < loops; i++) {
/* Attempt to read a PCR value */
- cmd.header.in = tpm2_pcrread_header;
- cmd.params.pcrread_in.pcr_selects_cnt = cpu_to_be32(1);
- cmd.params.pcrread_in.hash_alg = cpu_to_be16(TPM2_ALG_SHA1);
- cmd.params.pcrread_in.pcr_select_size = TPM2_PCR_SELECT_MIN;
- cmd.params.pcrread_in.pcr_select[0] = 0x01;
- cmd.params.pcrread_in.pcr_select[1] = 0x00;
- cmd.params.pcrread_in.pcr_select[2] = 0x00;
-
- rc = tpm_transmit_cmd(chip, NULL, &cmd, sizeof(cmd), 0, 0,
- NULL);
+ rc = tpm2_pcr_read(chip, 0, NULL);
if (rc < 0)
break;
- rc = be32_to_cpu(cmd.header.out.return_code);
if (rc != TPM2_RC_TESTING)
break;
--
2.9.3
next prev parent reply other threads:[~2017-06-23 13:41 UTC|newest]
Thread overview: 7+ messages / expand[flat|nested] mbox.gz Atom feed top
2017-06-23 13:41 [PATCH 0/2] Update PCR read code Roberto Sassu
2017-06-23 13:41 ` [PATCH 1/2] tpm: use tpm_buf functions in tpm2_pcr_read() Roberto Sassu
2017-06-28 22:18 ` Jarkko Sakkinen
2017-06-29 19:54 ` Jarkko Sakkinen
2017-06-23 13:41 ` Roberto Sassu [this message]
2017-06-28 22:19 ` [PATCH 2/2] tpm: use tpm2_pcr_read() in tpm2_do_selftest() Jarkko Sakkinen
2017-06-29 19:56 ` [tpmdd-devel] " Jarkko Sakkinen
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