99 lines
2.7 KiB
C
99 lines
2.7 KiB
C
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/* SPDX-License-Identifier: GPL-2.0 */
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#ifndef __TRUSTED_TPM_H
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#define __TRUSTED_TPM_H
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#include <keys/trusted-type.h>
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#include <linux/tpm_command.h>
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/* implementation specific TPM constants */
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#define MAX_BUF_SIZE 1024
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#define TPM_GETRANDOM_SIZE 14
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#define TPM_SIZE_OFFSET 2
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#define TPM_RETURN_OFFSET 6
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#define TPM_DATA_OFFSET 10
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#define LOAD32(buffer, offset) (ntohl(*(uint32_t *)&buffer[offset]))
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#define LOAD32N(buffer, offset) (*(uint32_t *)&buffer[offset])
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#define LOAD16(buffer, offset) (ntohs(*(uint16_t *)&buffer[offset]))
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extern struct trusted_key_ops trusted_key_tpm_ops;
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struct osapsess {
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uint32_t handle;
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unsigned char secret[SHA1_DIGEST_SIZE];
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unsigned char enonce[TPM_NONCE_SIZE];
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};
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/* discrete values, but have to store in uint16_t for TPM use */
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enum {
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SEAL_keytype = 1,
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SRK_keytype = 4
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};
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int TSS_authhmac(unsigned char *digest, const unsigned char *key,
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unsigned int keylen, unsigned char *h1,
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unsigned char *h2, unsigned int h3, ...);
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int TSS_checkhmac1(unsigned char *buffer,
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const uint32_t command,
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const unsigned char *ononce,
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const unsigned char *key,
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unsigned int keylen, ...);
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int trusted_tpm_send(unsigned char *cmd, size_t buflen);
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int oiap(struct tpm_buf *tb, uint32_t *handle, unsigned char *nonce);
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int tpm2_seal_trusted(struct tpm_chip *chip,
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struct trusted_key_payload *payload,
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struct trusted_key_options *options);
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int tpm2_unseal_trusted(struct tpm_chip *chip,
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struct trusted_key_payload *payload,
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struct trusted_key_options *options);
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#define TPM_DEBUG 0
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#if TPM_DEBUG
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static inline void dump_options(struct trusted_key_options *o)
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{
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pr_info("sealing key type %d\n", o->keytype);
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pr_info("sealing key handle %0X\n", o->keyhandle);
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pr_info("pcrlock %d\n", o->pcrlock);
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pr_info("pcrinfo %d\n", o->pcrinfo_len);
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print_hex_dump(KERN_INFO, "pcrinfo ", DUMP_PREFIX_NONE,
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16, 1, o->pcrinfo, o->pcrinfo_len, 0);
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}
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static inline void dump_sess(struct osapsess *s)
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{
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print_hex_dump(KERN_INFO, "trusted-key: handle ", DUMP_PREFIX_NONE,
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16, 1, &s->handle, 4, 0);
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pr_info("secret:\n");
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print_hex_dump(KERN_INFO, "", DUMP_PREFIX_NONE,
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16, 1, &s->secret, SHA1_DIGEST_SIZE, 0);
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pr_info("trusted-key: enonce:\n");
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print_hex_dump(KERN_INFO, "", DUMP_PREFIX_NONE,
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16, 1, &s->enonce, SHA1_DIGEST_SIZE, 0);
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}
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static inline void dump_tpm_buf(unsigned char *buf)
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{
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int len;
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pr_info("\ntpm buffer\n");
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len = LOAD32(buf, TPM_SIZE_OFFSET);
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print_hex_dump(KERN_INFO, "", DUMP_PREFIX_NONE, 16, 1, buf, len, 0);
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}
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#else
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static inline void dump_options(struct trusted_key_options *o)
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{
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}
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static inline void dump_sess(struct osapsess *s)
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{
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}
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static inline void dump_tpm_buf(unsigned char *buf)
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{
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}
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#endif
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#endif
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