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aa04247593
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>
129 lines
3.6 KiB
C
129 lines
3.6 KiB
C
/*
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* Copyright (C) 2004,2007,2008 IBM Corporation
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*
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* Authors:
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* Leendert van Doorn <leendert@watson.ibm.com>
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* Dave Safford <safford@watson.ibm.com>
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* Reiner Sailer <sailer@watson.ibm.com>
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* Kylene Hall <kjhall@us.ibm.com>
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* Debora Velarde <dvelarde@us.ibm.com>
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*
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* Maintained by: <tpmdd_devel@lists.sourceforge.net>
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*
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* Device driver for TCG/TCPA TPM (trusted platform module).
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* Specifications at www.trustedcomputinggroup.org
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*
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* This program is free software; you can redistribute it and/or
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* modify it under the terms of the GNU General Public License as
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* published by the Free Software Foundation, version 2 of the
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* License.
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*
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*/
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#ifndef __LINUX_TPM_H__
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#define __LINUX_TPM_H__
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#include <crypto/hash_info.h>
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#define TPM_DIGEST_SIZE 20 /* Max TPM v1.2 PCR size */
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#define TPM_MAX_DIGEST_SIZE SHA512_DIGEST_SIZE
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struct tpm_chip;
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struct trusted_key_payload;
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struct trusted_key_options;
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enum tpm_algorithms {
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TPM_ALG_ERROR = 0x0000,
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TPM_ALG_SHA1 = 0x0004,
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TPM_ALG_KEYEDHASH = 0x0008,
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TPM_ALG_SHA256 = 0x000B,
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TPM_ALG_SHA384 = 0x000C,
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TPM_ALG_SHA512 = 0x000D,
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TPM_ALG_NULL = 0x0010,
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TPM_ALG_SM3_256 = 0x0012,
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};
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struct tpm_digest {
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u16 alg_id;
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u8 digest[TPM_MAX_DIGEST_SIZE];
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} __packed;
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enum TPM_OPS_FLAGS {
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TPM_OPS_AUTO_STARTUP = BIT(0),
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};
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struct tpm_class_ops {
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unsigned int flags;
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const u8 req_complete_mask;
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const u8 req_complete_val;
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bool (*req_canceled)(struct tpm_chip *chip, u8 status);
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int (*recv) (struct tpm_chip *chip, u8 *buf, size_t len);
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int (*send) (struct tpm_chip *chip, u8 *buf, size_t len);
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void (*cancel) (struct tpm_chip *chip);
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u8 (*status) (struct tpm_chip *chip);
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void (*update_timeouts)(struct tpm_chip *chip,
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unsigned long *timeout_cap);
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int (*go_idle)(struct tpm_chip *chip);
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int (*cmd_ready)(struct tpm_chip *chip);
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int (*request_locality)(struct tpm_chip *chip, int loc);
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int (*relinquish_locality)(struct tpm_chip *chip, int loc);
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void (*clk_enable)(struct tpm_chip *chip, bool value);
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};
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#if defined(CONFIG_TCG_TPM) || defined(CONFIG_TCG_TPM_MODULE)
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extern int tpm_is_tpm2(struct tpm_chip *chip);
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extern int tpm_pcr_read(struct tpm_chip *chip, u32 pcr_idx, u8 *res_buf);
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extern int tpm_pcr_extend(struct tpm_chip *chip, u32 pcr_idx, const u8 *hash);
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extern int tpm_send(struct tpm_chip *chip, void *cmd, size_t buflen);
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extern int tpm_get_random(struct tpm_chip *chip, u8 *data, size_t max);
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extern int tpm_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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extern int tpm_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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extern struct tpm_chip *tpm_default_chip(void);
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#else
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static inline int tpm_is_tpm2(struct tpm_chip *chip)
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{
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return -ENODEV;
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}
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static inline int tpm_pcr_read(struct tpm_chip *chip, u32 pcr_idx, u8 *res_buf)
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{
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return -ENODEV;
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}
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static inline int tpm_pcr_extend(struct tpm_chip *chip, u32 pcr_idx,
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const u8 *hash)
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{
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return -ENODEV;
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}
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static inline int tpm_send(struct tpm_chip *chip, void *cmd, size_t buflen)
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{
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return -ENODEV;
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}
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static inline int tpm_get_random(struct tpm_chip *chip, u8 *data, size_t max)
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{
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return -ENODEV;
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}
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static inline int tpm_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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{
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return -ENODEV;
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}
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static inline int tpm_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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{
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return -ENODEV;
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}
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static inline struct tpm_chip *tpm_default_chip(void)
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{
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return NULL;
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}
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#endif
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#endif
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