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- /* SPDX-License-Identifier: GPL-2.0 */
- #ifndef __TRUSTED_TPM_H
- #define __TRUSTED_TPM_H
- #include <keys/trusted-type.h>
- #include <linux/tpm_command.h>
- /* implementation specific TPM constants */
- #define MAX_BUF_SIZE 1024
- #define TPM_GETRANDOM_SIZE 14
- #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 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 int 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);
- int tpm2_seal_trusted(struct tpm_chip *chip,
- struct trusted_key_payload *payload,
- struct trusted_key_options *options);
- int tpm2_unseal_trusted(struct tpm_chip *chip,
- struct trusted_key_payload *payload,
- struct trusted_key_options *options);
- #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);
- }
- static inline void dump_payload(struct trusted_key_payload *p)
- {
- pr_info("trusted_key: key_len %d\n", p->key_len);
- print_hex_dump(KERN_INFO, "key ", DUMP_PREFIX_NONE,
- 16, 1, p->key, p->key_len, 0);
- pr_info("trusted_key: bloblen %d\n", p->blob_len);
- print_hex_dump(KERN_INFO, "blob ", DUMP_PREFIX_NONE,
- 16, 1, p->blob, p->blob_len, 0);
- pr_info("trusted_key: migratable %d\n", p->migratable);
- }
- static inline void dump_sess(struct osapsess *s)
- {
- print_hex_dump(KERN_INFO, "trusted-key: handle ", DUMP_PREFIX_NONE,
- 16, 1, &s->handle, 4, 0);
- pr_info("trusted-key: secret:\n");
- print_hex_dump(KERN_INFO, "", DUMP_PREFIX_NONE,
- 16, 1, &s->secret, SHA1_DIGEST_SIZE, 0);
- pr_info("trusted-key: enonce:\n");
- print_hex_dump(KERN_INFO, "", DUMP_PREFIX_NONE,
- 16, 1, &s->enonce, SHA1_DIGEST_SIZE, 0);
- }
- static inline void dump_tpm_buf(unsigned char *buf)
- {
- int len;
- pr_info("\ntrusted-key: tpm buffer\n");
- len = LOAD32(buf, TPM_SIZE_OFFSET);
- print_hex_dump(KERN_INFO, "", DUMP_PREFIX_NONE, 16, 1, buf, len, 0);
- }
- #else
- static inline void dump_options(struct trusted_key_options *o)
- {
- }
- static inline void dump_payload(struct trusted_key_payload *p)
- {
- }
- static inline void dump_sess(struct osapsess *s)
- {
- }
- static inline void dump_tpm_buf(unsigned char *buf)
- {
- }
- #endif
- #endif
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