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* [PATCH 0/2] Update PCR read code
@ 2017-06-23 13:41 Roberto Sassu
  2017-06-23 13:41 ` [PATCH 1/2] tpm: use tpm_buf functions in tpm2_pcr_read() Roberto Sassu
  2017-06-23 13:41 ` [PATCH 2/2] tpm: use tpm2_pcr_read() in tpm2_do_selftest() Roberto Sassu
  0 siblings, 2 replies; 7+ messages in thread
From: Roberto Sassu @ 2017-06-23 13:41 UTC (permalink / raw)
  To: tpmdd-devel
  Cc: linux-ima-devel, linux-security-module, linux-kernel, Roberto Sassu

This patch set updates tpm2_pcr_read(), to build the PCR read command
buffer with tpm_buf functions, which offer protection against buffer
overflow.

It also removes duplicate code in tpm2_do_selftest(), and replaces it with
a call to tpm2_pcr_read().

The previous version of the patches can be found at the URLs:

https://sourceforge.net/p/tpmdd/mailman/message/35905413/
https://sourceforge.net/p/tpmdd/mailman/message/35905415/

The version number has not been incremented from 3 to 4, since this
is considered as a new patch set, not providing the same functionality
of the set the patches were originally part of.

Changelog

- PCR code changes are applied directly to tpm2_pcr_read()
- removed tpm2_pcr_read_in structure
- modified size of digest array in tpm2_pcr_read_out structure

Roberto Sassu (2):
  tpm: use tpm_buf functions in tpm2_pcr_read()
  tpm: use tpm2_pcr_read() in tpm2_do_selftest()

 drivers/char/tpm/tpm2-cmd.c | 89 +++++++++++++++------------------------------
 1 file changed, 30 insertions(+), 59 deletions(-)

-- 
2.9.3


^ permalink raw reply	[flat|nested] 7+ messages in thread

* [PATCH 1/2] tpm: use tpm_buf functions in tpm2_pcr_read()
  2017-06-23 13:41 [PATCH 0/2] Update PCR read code Roberto Sassu
@ 2017-06-23 13:41 ` Roberto Sassu
  2017-06-28 22:18   ` Jarkko Sakkinen
  2017-06-23 13:41 ` [PATCH 2/2] tpm: use tpm2_pcr_read() in tpm2_do_selftest() Roberto Sassu
  1 sibling, 1 reply; 7+ messages in thread
From: Roberto Sassu @ 2017-06-23 13:41 UTC (permalink / raw)
  To: tpmdd-devel
  Cc: linux-ima-devel, linux-security-module, linux-kernel, Roberto Sassu

tpm2_pcr_read() now builds the PCR read command buffer with tpm_buf
functions. This solution is preferred to using a tpm2_cmd structure,
as tpm_buf functions provide protection against buffer overflow.

Signed-off-by: Roberto Sassu <roberto.sassu@huawei.com>
---
 drivers/char/tpm/tpm2-cmd.c | 60 ++++++++++++++++++++++-----------------------
 1 file changed, 30 insertions(+), 30 deletions(-)

diff --git a/drivers/char/tpm/tpm2-cmd.c b/drivers/char/tpm/tpm2-cmd.c
index 3a99643..fdce77d 100644
--- a/drivers/char/tpm/tpm2-cmd.c
+++ b/drivers/char/tpm/tpm2-cmd.c
@@ -42,17 +42,6 @@ struct tpm2_pcr_read_in {
 	u8	pcr_select[TPM2_PCR_SELECT_MIN];
 } __packed;
 
-struct tpm2_pcr_read_out {
-	__be32	update_cnt;
-	__be32	pcr_selects_cnt;
-	__be16	hash_alg;
-	u8	pcr_select_size;
-	u8	pcr_select[TPM2_PCR_SELECT_MIN];
-	__be32	digests_cnt;
-	__be16	digest_size;
-	u8	digest[TPM_DIGEST_SIZE];
-} __packed;
-
 struct tpm2_get_tpm_pt_in {
 	__be32	cap_id;
 	__be32	property_id;
@@ -80,7 +69,6 @@ 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_pcr_read_out	pcrread_out;
 	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;
@@ -231,15 +219,23 @@ static const u8 tpm2_ordinal_duration[TPM2_CC_LAST - TPM2_CC_FIRST + 1] = {
 	(sizeof(struct tpm_input_header) + \
 	 sizeof(struct tpm2_pcr_read_in))
 
-#define TPM2_PCR_READ_RESP_BODY_SIZE \
-	 sizeof(struct tpm2_pcr_read_out)
-
 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;
+	__be16	hash_alg;
+	u8	pcr_select_size;
+	u8	pcr_select[TPM2_PCR_SELECT_MIN];
+	__be32	digests_cnt;
+	__be16	digest_size;
+	u8	digest[];
+} __packed;
+
 /**
  * tpm2_pcr_read() - read a PCR value
  * @chip:	TPM chip to use.
@@ -251,29 +247,33 @@ static const struct tpm_input_header tpm2_pcrread_header = {
 int tpm2_pcr_read(struct tpm_chip *chip, int pcr_idx, u8 *res_buf)
 {
 	int rc;
-	struct tpm2_cmd cmd;
-	u8 *buf;
+	struct tpm_buf buf;
+	struct tpm2_pcr_read_out *out;
+	u8 pcr_select[TPM2_PCR_SELECT_MIN] = {0};
 
 	if (pcr_idx >= TPM2_PLATFORM_PCR)
 		return -EINVAL;
 
-	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;
+	rc = tpm_buf_init(&buf, TPM2_ST_NO_SESSIONS, TPM2_CC_PCR_READ);
+	if (rc)
+		return rc;
 
-	memset(cmd.params.pcrread_in.pcr_select, 0,
-	       sizeof(cmd.params.pcrread_in.pcr_select));
-	cmd.params.pcrread_in.pcr_select[pcr_idx >> 3] = 1 << (pcr_idx & 0x7);
+	pcr_select[pcr_idx >> 3] = 1 << (pcr_idx & 0x7);
 
-	rc = tpm_transmit_cmd(chip, NULL, &cmd, sizeof(cmd),
-			      TPM2_PCR_READ_RESP_BODY_SIZE,
-			      0, "attempting to read a pcr value");
-	if (rc == 0) {
-		buf = cmd.params.pcrread_out.digest;
-		memcpy(res_buf, buf, TPM_DIGEST_SIZE);
+	tpm_buf_append_u32(&buf, 1);
+	tpm_buf_append_u16(&buf, TPM2_ALG_SHA1);
+	tpm_buf_append_u8(&buf, TPM2_PCR_SELECT_MIN);
+	tpm_buf_append(&buf, (const unsigned char *)pcr_select,
+		       sizeof(pcr_select));
+
+	rc = tpm_transmit_cmd(chip, NULL, buf.data, PAGE_SIZE, 0, 0,
+			res_buf ? "attempting to read a pcr value" : NULL);
+	if (rc == 0 && res_buf) {
+		out = (struct tpm2_pcr_read_out *)&buf.data[TPM_HEADER_SIZE];
+		memcpy(res_buf, out->digest, SHA1_DIGEST_SIZE);
 	}
 
+	tpm_buf_destroy(&buf);
 	return rc;
 }
 
-- 
2.9.3


^ permalink raw reply	[flat|nested] 7+ messages in thread

* [PATCH 2/2] tpm: use tpm2_pcr_read() in tpm2_do_selftest()
  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
@ 2017-06-23 13:41 ` Roberto Sassu
  2017-06-28 22:19   ` Jarkko Sakkinen
  1 sibling, 1 reply; 7+ messages in thread
From: Roberto Sassu @ 2017-06-23 13:41 UTC (permalink / raw)
  To: tpmdd-devel
  Cc: linux-ima-devel, linux-security-module, linux-kernel, Roberto Sassu

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

^ permalink raw reply	[flat|nested] 7+ messages in thread

* Re: [PATCH 1/2] tpm: use tpm_buf functions in tpm2_pcr_read()
  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
  0 siblings, 1 reply; 7+ messages in thread
From: Jarkko Sakkinen @ 2017-06-28 22:18 UTC (permalink / raw)
  To: Roberto Sassu
  Cc: tpmdd-devel, linux-ima-devel, linux-security-module, linux-kernel

On Fri, Jun 23, 2017 at 03:41:56PM +0200, Roberto Sassu wrote:
> tpm2_pcr_read() now builds the PCR read command buffer with tpm_buf
> functions. This solution is preferred to using a tpm2_cmd structure,
> as tpm_buf functions provide protection against buffer overflow.
> 
> Signed-off-by: Roberto Sassu <roberto.sassu@huawei.com>

Reviewed-by: Jarkko Sakkinen <jarkko.sakkinen@linux.intel.com>

> ---
>  drivers/char/tpm/tpm2-cmd.c | 60 ++++++++++++++++++++++-----------------------
>  1 file changed, 30 insertions(+), 30 deletions(-)
> 
> diff --git a/drivers/char/tpm/tpm2-cmd.c b/drivers/char/tpm/tpm2-cmd.c
> index 3a99643..fdce77d 100644
> --- a/drivers/char/tpm/tpm2-cmd.c
> +++ b/drivers/char/tpm/tpm2-cmd.c
> @@ -42,17 +42,6 @@ struct tpm2_pcr_read_in {
>  	u8	pcr_select[TPM2_PCR_SELECT_MIN];
>  } __packed;
>  
> -struct tpm2_pcr_read_out {
> -	__be32	update_cnt;
> -	__be32	pcr_selects_cnt;
> -	__be16	hash_alg;
> -	u8	pcr_select_size;
> -	u8	pcr_select[TPM2_PCR_SELECT_MIN];
> -	__be32	digests_cnt;
> -	__be16	digest_size;
> -	u8	digest[TPM_DIGEST_SIZE];
> -} __packed;
> -
>  struct tpm2_get_tpm_pt_in {
>  	__be32	cap_id;
>  	__be32	property_id;
> @@ -80,7 +69,6 @@ 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_pcr_read_out	pcrread_out;
>  	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;
> @@ -231,15 +219,23 @@ static const u8 tpm2_ordinal_duration[TPM2_CC_LAST - TPM2_CC_FIRST + 1] = {
>  	(sizeof(struct tpm_input_header) + \
>  	 sizeof(struct tpm2_pcr_read_in))
>  
> -#define TPM2_PCR_READ_RESP_BODY_SIZE \
> -	 sizeof(struct tpm2_pcr_read_out)
> -
>  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;
> +	__be16	hash_alg;
> +	u8	pcr_select_size;
> +	u8	pcr_select[TPM2_PCR_SELECT_MIN];
> +	__be32	digests_cnt;
> +	__be16	digest_size;
> +	u8	digest[];
> +} __packed;
> +
>  /**
>   * tpm2_pcr_read() - read a PCR value
>   * @chip:	TPM chip to use.
> @@ -251,29 +247,33 @@ static const struct tpm_input_header tpm2_pcrread_header = {
>  int tpm2_pcr_read(struct tpm_chip *chip, int pcr_idx, u8 *res_buf)
>  {
>  	int rc;
> -	struct tpm2_cmd cmd;
> -	u8 *buf;
> +	struct tpm_buf buf;
> +	struct tpm2_pcr_read_out *out;
> +	u8 pcr_select[TPM2_PCR_SELECT_MIN] = {0};
>  
>  	if (pcr_idx >= TPM2_PLATFORM_PCR)
>  		return -EINVAL;
>  
> -	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;
> +	rc = tpm_buf_init(&buf, TPM2_ST_NO_SESSIONS, TPM2_CC_PCR_READ);
> +	if (rc)
> +		return rc;
>  
> -	memset(cmd.params.pcrread_in.pcr_select, 0,
> -	       sizeof(cmd.params.pcrread_in.pcr_select));
> -	cmd.params.pcrread_in.pcr_select[pcr_idx >> 3] = 1 << (pcr_idx & 0x7);
> +	pcr_select[pcr_idx >> 3] = 1 << (pcr_idx & 0x7);
>  
> -	rc = tpm_transmit_cmd(chip, NULL, &cmd, sizeof(cmd),
> -			      TPM2_PCR_READ_RESP_BODY_SIZE,
> -			      0, "attempting to read a pcr value");
> -	if (rc == 0) {
> -		buf = cmd.params.pcrread_out.digest;
> -		memcpy(res_buf, buf, TPM_DIGEST_SIZE);
> +	tpm_buf_append_u32(&buf, 1);
> +	tpm_buf_append_u16(&buf, TPM2_ALG_SHA1);
> +	tpm_buf_append_u8(&buf, TPM2_PCR_SELECT_MIN);
> +	tpm_buf_append(&buf, (const unsigned char *)pcr_select,
> +		       sizeof(pcr_select));
> +
> +	rc = tpm_transmit_cmd(chip, NULL, buf.data, PAGE_SIZE, 0, 0,
> +			res_buf ? "attempting to read a pcr value" : NULL);
> +	if (rc == 0 && res_buf) {
> +		out = (struct tpm2_pcr_read_out *)&buf.data[TPM_HEADER_SIZE];
> +		memcpy(res_buf, out->digest, SHA1_DIGEST_SIZE);
>  	}
>  
> +	tpm_buf_destroy(&buf);
>  	return rc;
>  }
>  
> -- 
> 2.9.3
> 

^ permalink raw reply	[flat|nested] 7+ messages in thread

* Re: [PATCH 2/2] tpm: use tpm2_pcr_read() in tpm2_do_selftest()
  2017-06-23 13:41 ` [PATCH 2/2] tpm: use tpm2_pcr_read() in tpm2_do_selftest() Roberto Sassu
@ 2017-06-28 22:19   ` Jarkko Sakkinen
  2017-06-29 19:56     ` [tpmdd-devel] " Jarkko Sakkinen
  0 siblings, 1 reply; 7+ messages in thread
From: Jarkko Sakkinen @ 2017-06-28 22:19 UTC (permalink / raw)
  To: Roberto Sassu
  Cc: tpmdd-devel, linux-ima-devel, linux-security-module, linux-kernel

On Fri, Jun 23, 2017 at 03:41:57PM +0200, Roberto Sassu wrote:
> 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>

Reviewed-by: Jarkko Sakkinen <jarkko.sakkine@linux.intel.com>

/Jarkko

> ---
>  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
> 

^ permalink raw reply	[flat|nested] 7+ messages in thread

* Re: [PATCH 1/2] tpm: use tpm_buf functions in tpm2_pcr_read()
  2017-06-28 22:18   ` Jarkko Sakkinen
@ 2017-06-29 19:54     ` Jarkko Sakkinen
  0 siblings, 0 replies; 7+ messages in thread
From: Jarkko Sakkinen @ 2017-06-29 19:54 UTC (permalink / raw)
  To: Roberto Sassu
  Cc: tpmdd-devel, linux-ima-devel, linux-security-module, linux-kernel

On Thu, Jun 29, 2017 at 01:18:58AM +0300, Jarkko Sakkinen wrote:
> On Fri, Jun 23, 2017 at 03:41:56PM +0200, Roberto Sassu wrote:
> > tpm2_pcr_read() now builds the PCR read command buffer with tpm_buf
> > functions. This solution is preferred to using a tpm2_cmd structure,
> > as tpm_buf functions provide protection against buffer overflow.
> > 
> > Signed-off-by: Roberto Sassu <roberto.sassu@huawei.com>
> 
> Reviewed-by: Jarkko Sakkinen <jarkko.sakkinen@linux.intel.com>

Tested-by: Jarkko Sakkinen <jarkko.sakkinen@linux.intel.com>

/Jarkko

^ permalink raw reply	[flat|nested] 7+ messages in thread

* Re: [tpmdd-devel] [PATCH 2/2] tpm: use tpm2_pcr_read() in tpm2_do_selftest()
  2017-06-28 22:19   ` Jarkko Sakkinen
@ 2017-06-29 19:56     ` Jarkko Sakkinen
  0 siblings, 0 replies; 7+ messages in thread
From: Jarkko Sakkinen @ 2017-06-29 19:56 UTC (permalink / raw)
  To: Roberto Sassu
  Cc: linux-ima-devel, linux-security-module, tpmdd-devel, linux-kernel

On Thu, Jun 29, 2017 at 01:19:35AM +0300, Jarkko Sakkinen wrote:
> On Fri, Jun 23, 2017 at 03:41:57PM +0200, Roberto Sassu wrote:
> > 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>
> 
> Reviewed-by: Jarkko Sakkinen <jarkko.sakkine@linux.intel.com>

Tested-by: Jarkko Sakkinen <jarkko.sakkine@linux.intel.com>

/Jarkko

^ permalink raw reply	[flat|nested] 7+ messages in thread

end of thread, other threads:[~2017-06-29 19:56 UTC | newest]

Thread overview: 7+ messages (download: mbox.gz / follow: Atom feed)
-- links below jump to the message on this page --
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 ` [PATCH 2/2] tpm: use tpm2_pcr_read() in tpm2_do_selftest() Roberto Sassu
2017-06-28 22:19   ` Jarkko Sakkinen
2017-06-29 19:56     ` [tpmdd-devel] " Jarkko Sakkinen

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