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tpm: rename and export tpm2_digest and tpm2_algorithms 

Rename tpm2_* to tpm_* and move the definitions to include/linux/tpm.h so
that these can be used by other kernel subsystems (e.g. IMA).

Also, set the length of the digest array in tpm_digest to a new constant
named TPM_MAX_DIGEST_SIZE, equal to SHA512_DIGEST_SIZE.

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>
Acked-by: Mimi Zohar <zohar@linux.ibm.com>
Signed-off-by: Jarkko Sakkinen <jarkko.sakkinen@linux.intel.com>
This commit is contained in:
Roberto Sassu 2019-02-06 17:24:48 +01:00 committed by Jarkko Sakkinen
parent bcfff8384f
commit aa04247593
6 changed files with 33 additions and 30 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

2
drivers/char/tpm/tpm-interface.c
View File

@ -318,7 +318,7 @@ EXPORT_SYMBOL_GPL(tpm_pcr_read);
int tpm_pcr_extend(struct tpm_chip *chip, u32 pcr_idx, const u8 *hash)
{
int rc;
struct tpm2_digest *digest_list;
struct tpm_digest *digest_list;
int i;
chip = tpm_find_get_ops(chip);

13
drivers/char/tpm/tpm.h
View File

@ -122,17 +122,6 @@ enum tpm2_return_codes {
TPM2_RC_RETRY = 0x0922,
};
enum tpm2_algorithms {
TPM2_ALG_ERROR = 0x0000,
TPM2_ALG_SHA1 = 0x0004,
TPM2_ALG_KEYEDHASH = 0x0008,
TPM2_ALG_SHA256 = 0x000B,
TPM2_ALG_SHA384 = 0x000C,
TPM2_ALG_SHA512 = 0x000D,
TPM2_ALG_NULL = 0x0010,
TPM2_ALG_SM3_256 = 0x0012,
};
enum tpm2_command_codes {
TPM2_CC_FIRST = 0x011F,
TPM2_CC_HIERARCHY_CONTROL = 0x0121,
@ -545,7 +534,7 @@ static inline u32 tpm2_rc_value(u32 rc)
int tpm2_get_timeouts(struct tpm_chip *chip);
int tpm2_pcr_read(struct tpm_chip *chip, u32 pcr_idx, u8 *res_buf);
int tpm2_pcr_extend(struct tpm_chip *chip, u32 pcr_idx, u32 count,
struct tpm2_digest *digests);
struct tpm_digest *digests);
int tpm2_get_random(struct tpm_chip *chip, u8 *dest, size_t max);
void tpm2_flush_context(struct tpm_chip *chip, u32 handle);
int tpm2_seal_trusted(struct tpm_chip *chip,

2
drivers/char/tpm/tpm1-cmd.c
View File

@ -703,7 +703,7 @@ int tpm1_auto_startup(struct tpm_chip *chip)
goto out;
}
chip->allocated_banks[0] = TPM2_ALG_SHA1;
chip->allocated_banks[0] = TPM_ALG_SHA1;
chip->nr_allocated_banks = 1;
return rc;

18
drivers/char/tpm/tpm2-cmd.c
View File

@ -33,11 +33,11 @@ struct tpm2_hash {
};
static struct tpm2_hash tpm2_hash_map[] = {
{HASH_ALGO_SHA1, TPM2_ALG_SHA1},
{HASH_ALGO_SHA256, TPM2_ALG_SHA256},
{HASH_ALGO_SHA384, TPM2_ALG_SHA384},
{HASH_ALGO_SHA512, TPM2_ALG_SHA512},
{HASH_ALGO_SM3_256, TPM2_ALG_SM3_256},
{HASH_ALGO_SHA1, TPM_ALG_SHA1},
{HASH_ALGO_SHA256, TPM_ALG_SHA256},
{HASH_ALGO_SHA384, TPM_ALG_SHA384},
{HASH_ALGO_SHA512, TPM_ALG_SHA512},
{HASH_ALGO_SM3_256, TPM_ALG_SM3_256},
};
int tpm2_get_timeouts(struct tpm_chip *chip)
@ -192,7 +192,7 @@ int tpm2_pcr_read(struct tpm_chip *chip, u32 pcr_idx, u8 *res_buf)
pcr_select[pcr_idx >> 3] = 1 << (pcr_idx & 0x7);
tpm_buf_append_u32(&buf, 1);
tpm_buf_append_u16(&buf, TPM2_ALG_SHA1);
tpm_buf_append_u16(&buf, TPM_ALG_SHA1);
tpm_buf_append_u8(&buf, TPM2_PCR_SELECT_MIN);
tpm_buf_append(&buf, (const unsigned char *)pcr_select,
sizeof(pcr_select));
@ -226,7 +226,7 @@ struct tpm2_null_auth_area {
* Return: Same as with tpm_transmit_cmd.
*/
int tpm2_pcr_extend(struct tpm_chip *chip, u32 pcr_idx, u32 count,
struct tpm2_digest *digests)
struct tpm_digest *digests)
{
struct tpm_buf buf;
struct tpm2_null_auth_area auth_area;
@ -443,7 +443,7 @@ int tpm2_seal_trusted(struct tpm_chip *chip,
/* public */
tpm_buf_append_u16(&buf, 14 + options->policydigest_len);
tpm_buf_append_u16(&buf, TPM2_ALG_KEYEDHASH);
tpm_buf_append_u16(&buf, TPM_ALG_KEYEDHASH);
tpm_buf_append_u16(&buf, hash);
/* policy */
@ -458,7 +458,7 @@ int tpm2_seal_trusted(struct tpm_chip *chip,
}
/* public parameters */
tpm_buf_append_u16(&buf, TPM2_ALG_NULL);
tpm_buf_append_u16(&buf, TPM_ALG_NULL);
tpm_buf_append_u16(&buf, 0);
/* outside info */

19
include/linux/tpm.h
View File

@ -22,12 +22,31 @@
#ifndef __LINUX_TPM_H__
#define __LINUX_TPM_H__
#include <crypto/hash_info.h>
#define TPM_DIGEST_SIZE 20 /* Max TPM v1.2 PCR size */
#define TPM_MAX_DIGEST_SIZE SHA512_DIGEST_SIZE
struct tpm_chip;
struct trusted_key_payload;
struct trusted_key_options;
enum tpm_algorithms {
TPM_ALG_ERROR = 0x0000,
TPM_ALG_SHA1 = 0x0004,
TPM_ALG_KEYEDHASH = 0x0008,
TPM_ALG_SHA256 = 0x000B,
TPM_ALG_SHA384 = 0x000C,
TPM_ALG_SHA512 = 0x000D,
TPM_ALG_NULL = 0x0010,
TPM_ALG_SM3_256 = 0x0012,
};
struct tpm_digest {
u16 alg_id;
u8 digest[TPM_MAX_DIGEST_SIZE];
} __packed;
enum TPM_OPS_FLAGS {
TPM_OPS_AUTO_STARTUP = BIT(0),
};

9
include/linux/tpm_eventlog.h
View File

@ -3,7 +3,7 @@
#ifndef __LINUX_TPM_EVENTLOG_H__
#define __LINUX_TPM_EVENTLOG_H__
#include <crypto/hash_info.h>
#include <linux/tpm.h>
#define TCG_EVENT_NAME_LEN_MAX 255
#define MAX_TEXT_EVENT 1000 /* Max event string length */
@ -105,16 +105,11 @@ struct tcg_event_field {
u8 event[0];
} __packed;
struct tpm2_digest {
u16 alg_id;
u8 digest[SHA512_DIGEST_SIZE];
} __packed;
struct tcg_pcr_event2_head {
u32 pcr_idx;
u32 event_type;
u32 count;
struct tpm2_digest digests[];
struct tpm_digest digests[];
} __packed;
#endif