97 lines · c
1/* SPDX-License-Identifier: GPL-2.0 */2#ifndef __TRUSTED_TPM_H3#define __TRUSTED_TPM_H4 5#include <keys/trusted-type.h>6#include <linux/tpm_command.h>7 8/* implementation specific TPM constants */9#define TPM_SIZE_OFFSET 210#define TPM_RETURN_OFFSET 611#define TPM_DATA_OFFSET 1012 13#define LOAD32(buffer, offset) (ntohl(*(uint32_t *)&buffer[offset]))14#define LOAD32N(buffer, offset) (*(uint32_t *)&buffer[offset])15#define LOAD16(buffer, offset) (ntohs(*(uint16_t *)&buffer[offset]))16 17extern struct trusted_key_ops trusted_key_tpm_ops;18 19struct osapsess {20 uint32_t handle;21 unsigned char secret[SHA1_DIGEST_SIZE];22 unsigned char enonce[TPM_NONCE_SIZE];23};24 25/* discrete values, but have to store in uint16_t for TPM use */26enum {27 SEAL_keytype = 1,28 SRK_keytype = 429};30 31int TSS_authhmac(unsigned char *digest, const unsigned char *key,32 unsigned int keylen, unsigned char *h1,33 unsigned char *h2, unsigned int h3, ...);34int TSS_checkhmac1(unsigned char *buffer,35 const uint32_t command,36 const unsigned char *ononce,37 const unsigned char *key,38 unsigned int keylen, ...);39 40int trusted_tpm_send(unsigned char *cmd, size_t buflen);41int oiap(struct tpm_buf *tb, uint32_t *handle, unsigned char *nonce);42 43int tpm2_seal_trusted(struct tpm_chip *chip,44 struct trusted_key_payload *payload,45 struct trusted_key_options *options);46int tpm2_unseal_trusted(struct tpm_chip *chip,47 struct trusted_key_payload *payload,48 struct trusted_key_options *options);49 50#define TPM_DEBUG 051 52#if TPM_DEBUG53static inline void dump_options(struct trusted_key_options *o)54{55 pr_info("sealing key type %d\n", o->keytype);56 pr_info("sealing key handle %0X\n", o->keyhandle);57 pr_info("pcrlock %d\n", o->pcrlock);58 pr_info("pcrinfo %d\n", o->pcrinfo_len);59 print_hex_dump(KERN_INFO, "pcrinfo ", DUMP_PREFIX_NONE,60 16, 1, o->pcrinfo, o->pcrinfo_len, 0);61}62 63static inline void dump_sess(struct osapsess *s)64{65 print_hex_dump(KERN_INFO, "trusted-key: handle ", DUMP_PREFIX_NONE,66 16, 1, &s->handle, 4, 0);67 pr_info("secret:\n");68 print_hex_dump(KERN_INFO, "", DUMP_PREFIX_NONE,69 16, 1, &s->secret, SHA1_DIGEST_SIZE, 0);70 pr_info("trusted-key: enonce:\n");71 print_hex_dump(KERN_INFO, "", DUMP_PREFIX_NONE,72 16, 1, &s->enonce, SHA1_DIGEST_SIZE, 0);73}74 75static inline void dump_tpm_buf(unsigned char *buf)76{77 int len;78 79 pr_info("\ntpm buffer\n");80 len = LOAD32(buf, TPM_SIZE_OFFSET);81 print_hex_dump(KERN_INFO, "", DUMP_PREFIX_NONE, 16, 1, buf, len, 0);82}83#else84static inline void dump_options(struct trusted_key_options *o)85{86}87 88static inline void dump_sess(struct osapsess *s)89{90}91 92static inline void dump_tpm_buf(unsigned char *buf)93{94}95#endif96#endif97