linux-imx

/* SPDX-License-Identifier: GPL-2.0 */

#ifndef __TRUSTED_KEY_H

#define __TRUSTED_KEY_H

​

/* implementation specific TPM constants */

#define MAX_BUF_SIZE            1024

#define TPM_GETRANDOM_SIZE      14

#define TPM_OSAP_SIZE           36

#define TPM_OIAP_SIZE           10

#define TPM_SEAL_SIZE           87

#define TPM_UNSEAL_SIZE         104

#define TPM_SIZE_OFFSET         2

#define TPM_RETURN_OFFSET       6

#define TPM_DATA_OFFSET         10

​

#define LOAD32(buffer, offset)  (ntohl(*(uint32_t *)&buffer[offset]))

#define LOAD32N(buffer, offset) (*(uint32_t *)&buffer[offset])

#define LOAD16(buffer, offset)  (ntohs(*(uint16_t *)&buffer[offset]))

​

struct tpm_buf {

    int len;

    unsigned char data[MAX_BUF_SIZE];

};

​

#define INIT_BUF(tb) (tb->len = 0)

​

struct osapsess {

    uint32_t handle;

    unsigned char secret[SHA1_DIGEST_SIZE];

    unsigned char enonce[TPM_NONCE_SIZE];

};

​

/* discrete values, but have to store in uint16_t for TPM use */

enum {

    SEAL_keytype = 1,

    SRK_keytype = 4

};

​

int TSS_authhmac(unsigned char *digest, const unsigned char *key,

            unsigned int keylen, unsigned char *h1,

            unsigned char *h2, unsigned char h3, ...);

int TSS_checkhmac1(unsigned char *buffer,

              const uint32_t command,

              const unsigned char *ononce,

              const unsigned char *key,

              unsigned int keylen, ...);

​

int trusted_tpm_send(unsigned char *cmd, size_t buflen);

int oiap(struct tpm_buf *tb, uint32_t *handle, unsigned char *nonce);

​

#define TPM_DEBUG 0

​

#if TPM_DEBUG

static inline void dump_options(struct trusted_key_options *o)

{

    pr_info("trusted_key: sealing key type %d\n", o->keytype);

    pr_info("trusted_key: sealing key handle %0X\n", o->keyhandle);

    pr_info("trusted_key: pcrlock %d\n", o->pcrlock);

    pr_info("trusted_key: pcrinfo %d\n", o->pcrinfo_len);

    print_hex_dump(KERN_INFO, "pcrinfo ", DUMP_PREFIX_NONE,

               16, 1, o->pcrinfo, o->pcrinfo_len, 0);

}

​