467 lines
11 KiB
C
467 lines
11 KiB
C
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/* SPDX-License-Identifier: GPL-2.0-only */
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/*
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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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#ifndef __LINUX_TPM_H__
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#define __LINUX_TPM_H__
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#include <linux/hw_random.h>
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#include <linux/acpi.h>
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#include <linux/cdev.h>
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#include <linux/fs.h>
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#include <linux/highmem.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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/* if you add a new hash to this, increment TPM_MAX_HASHES below */
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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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/*
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* maximum number of hashing algorithms a TPM can have. This is
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* basically a count of every hash in tpm_algorithms above
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*/
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#define TPM_MAX_HASHES 5
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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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struct tpm_bank_info {
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u16 alg_id;
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u16 digest_size;
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u16 crypto_id;
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};
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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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void (*update_durations)(struct tpm_chip *chip,
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unsigned long *duration_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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#define TPM_NUM_EVENT_LOG_FILES 3
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/* Indexes the duration array */
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enum tpm_duration {
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TPM_SHORT = 0,
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TPM_MEDIUM = 1,
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TPM_LONG = 2,
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TPM_LONG_LONG = 3,
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TPM_UNDEFINED,
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TPM_NUM_DURATIONS = TPM_UNDEFINED,
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};
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#define TPM_PPI_VERSION_LEN 3
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struct tpm_space {
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u32 context_tbl[3];
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u8 *context_buf;
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u32 session_tbl[3];
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u8 *session_buf;
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u32 buf_size;
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};
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struct tpm_bios_log {
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void *bios_event_log;
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void *bios_event_log_end;
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};
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struct tpm_chip_seqops {
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struct tpm_chip *chip;
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const struct seq_operations *seqops;
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};
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struct tpm_chip {
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struct device dev;
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struct device devs;
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struct cdev cdev;
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struct cdev cdevs;
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/* A driver callback under ops cannot be run unless ops_sem is held
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* (sometimes implicitly, eg for the sysfs code). ops becomes null
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* when the driver is unregistered, see tpm_try_get_ops.
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*/
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struct rw_semaphore ops_sem;
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const struct tpm_class_ops *ops;
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struct tpm_bios_log log;
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struct tpm_chip_seqops bin_log_seqops;
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struct tpm_chip_seqops ascii_log_seqops;
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unsigned int flags;
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int dev_num; /* /dev/tpm# */
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unsigned long is_open; /* only one allowed */
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char hwrng_name[64];
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struct hwrng hwrng;
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struct mutex tpm_mutex; /* tpm is processing */
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unsigned long timeout_a; /* jiffies */
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unsigned long timeout_b; /* jiffies */
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unsigned long timeout_c; /* jiffies */
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unsigned long timeout_d; /* jiffies */
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bool timeout_adjusted;
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unsigned long duration[TPM_NUM_DURATIONS]; /* jiffies */
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bool duration_adjusted;
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struct dentry *bios_dir[TPM_NUM_EVENT_LOG_FILES];
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const struct attribute_group *groups[3 + TPM_MAX_HASHES];
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unsigned int groups_cnt;
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u32 nr_allocated_banks;
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struct tpm_bank_info *allocated_banks;
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#ifdef CONFIG_ACPI
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acpi_handle acpi_dev_handle;
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char ppi_version[TPM_PPI_VERSION_LEN + 1];
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#endif /* CONFIG_ACPI */
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struct tpm_space work_space;
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u32 last_cc;
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u32 nr_commands;
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u32 *cc_attrs_tbl;
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/* active locality */
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int locality;
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};
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#define TPM_HEADER_SIZE 10
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enum tpm2_const {
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TPM2_PLATFORM_PCR = 24,
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TPM2_PCR_SELECT_MIN = ((TPM2_PLATFORM_PCR + 7) / 8),
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};
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enum tpm2_timeouts {
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TPM2_TIMEOUT_A = 750,
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TPM2_TIMEOUT_B = 2000,
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TPM2_TIMEOUT_C = 200,
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TPM2_TIMEOUT_D = 30,
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TPM2_DURATION_SHORT = 20,
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TPM2_DURATION_MEDIUM = 750,
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TPM2_DURATION_LONG = 2000,
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TPM2_DURATION_LONG_LONG = 300000,
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TPM2_DURATION_DEFAULT = 120000,
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};
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enum tpm2_structures {
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TPM2_ST_NO_SESSIONS = 0x8001,
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TPM2_ST_SESSIONS = 0x8002,
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};
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/* Indicates from what layer of the software stack the error comes from */
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#define TSS2_RC_LAYER_SHIFT 16
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#define TSS2_RESMGR_TPM_RC_LAYER (11 << TSS2_RC_LAYER_SHIFT)
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enum tpm2_return_codes {
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TPM2_RC_SUCCESS = 0x0000,
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TPM2_RC_HASH = 0x0083, /* RC_FMT1 */
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TPM2_RC_HANDLE = 0x008B,
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TPM2_RC_INITIALIZE = 0x0100, /* RC_VER1 */
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TPM2_RC_FAILURE = 0x0101,
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TPM2_RC_DISABLED = 0x0120,
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TPM2_RC_UPGRADE = 0x012D,
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TPM2_RC_COMMAND_CODE = 0x0143,
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TPM2_RC_TESTING = 0x090A, /* RC_WARN */
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TPM2_RC_REFERENCE_H0 = 0x0910,
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TPM2_RC_RETRY = 0x0922,
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};
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enum tpm2_command_codes {
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TPM2_CC_FIRST = 0x011F,
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TPM2_CC_HIERARCHY_CONTROL = 0x0121,
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TPM2_CC_HIERARCHY_CHANGE_AUTH = 0x0129,
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TPM2_CC_CREATE_PRIMARY = 0x0131,
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TPM2_CC_SEQUENCE_COMPLETE = 0x013E,
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TPM2_CC_SELF_TEST = 0x0143,
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TPM2_CC_STARTUP = 0x0144,
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TPM2_CC_SHUTDOWN = 0x0145,
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TPM2_CC_NV_READ = 0x014E,
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TPM2_CC_CREATE = 0x0153,
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TPM2_CC_LOAD = 0x0157,
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TPM2_CC_SEQUENCE_UPDATE = 0x015C,
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TPM2_CC_UNSEAL = 0x015E,
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TPM2_CC_CONTEXT_LOAD = 0x0161,
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TPM2_CC_CONTEXT_SAVE = 0x0162,
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TPM2_CC_FLUSH_CONTEXT = 0x0165,
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TPM2_CC_VERIFY_SIGNATURE = 0x0177,
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TPM2_CC_GET_CAPABILITY = 0x017A,
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TPM2_CC_GET_RANDOM = 0x017B,
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TPM2_CC_PCR_READ = 0x017E,
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TPM2_CC_PCR_EXTEND = 0x0182,
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TPM2_CC_EVENT_SEQUENCE_COMPLETE = 0x0185,
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TPM2_CC_HASH_SEQUENCE_START = 0x0186,
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TPM2_CC_CREATE_LOADED = 0x0191,
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TPM2_CC_LAST = 0x0193, /* Spec 1.36 */
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};
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enum tpm2_permanent_handles {
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TPM2_RS_PW = 0x40000009,
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};
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enum tpm2_capabilities {
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TPM2_CAP_HANDLES = 1,
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TPM2_CAP_COMMANDS = 2,
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TPM2_CAP_PCRS = 5,
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TPM2_CAP_TPM_PROPERTIES = 6,
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};
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enum tpm2_properties {
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TPM_PT_TOTAL_COMMANDS = 0x0129,
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};
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enum tpm2_startup_types {
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TPM2_SU_CLEAR = 0x0000,
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TPM2_SU_STATE = 0x0001,
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};
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enum tpm2_cc_attrs {
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TPM2_CC_ATTR_CHANDLES = 25,
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TPM2_CC_ATTR_RHANDLE = 28,
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TPM2_CC_ATTR_VENDOR = 29,
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};
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#define TPM_VID_INTEL 0x8086
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#define TPM_VID_WINBOND 0x1050
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#define TPM_VID_STM 0x104A
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#define TPM_VID_ATML 0x1114
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enum tpm_chip_flags {
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TPM_CHIP_FLAG_BOOTSTRAPPED = BIT(0),
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TPM_CHIP_FLAG_TPM2 = BIT(1),
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TPM_CHIP_FLAG_IRQ = BIT(2),
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TPM_CHIP_FLAG_VIRTUAL = BIT(3),
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TPM_CHIP_FLAG_HAVE_TIMEOUTS = BIT(4),
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TPM_CHIP_FLAG_ALWAYS_POWERED = BIT(5),
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TPM_CHIP_FLAG_FIRMWARE_POWER_MANAGED = BIT(6),
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TPM_CHIP_FLAG_FIRMWARE_UPGRADE = BIT(7),
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TPM_CHIP_FLAG_SUSPENDED = BIT(8),
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};
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#define to_tpm_chip(d) container_of(d, struct tpm_chip, dev)
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struct tpm_header {
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__be16 tag;
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__be32 length;
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union {
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__be32 ordinal;
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__be32 return_code;
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};
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} __packed;
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/* A string buffer type for constructing TPM commands. This is based on the
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* ideas of string buffer code in security/keys/trusted.h but is heap based
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* in order to keep the stack usage minimal.
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*/
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enum tpm_buf_flags {
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TPM_BUF_OVERFLOW = BIT(0),
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};
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struct tpm_buf {
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unsigned int flags;
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u8 *data;
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};
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enum tpm2_object_attributes {
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TPM2_OA_FIXED_TPM = BIT(1),
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TPM2_OA_FIXED_PARENT = BIT(4),
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TPM2_OA_USER_WITH_AUTH = BIT(6),
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};
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enum tpm2_session_attributes {
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TPM2_SA_CONTINUE_SESSION = BIT(0),
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};
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struct tpm2_hash {
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unsigned int crypto_id;
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unsigned int tpm_id;
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};
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static inline void tpm_buf_reset(struct tpm_buf *buf, u16 tag, u32 ordinal)
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{
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struct tpm_header *head = (struct tpm_header *)buf->data;
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head->tag = cpu_to_be16(tag);
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head->length = cpu_to_be32(sizeof(*head));
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head->ordinal = cpu_to_be32(ordinal);
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}
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static inline int tpm_buf_init(struct tpm_buf *buf, u16 tag, u32 ordinal)
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{
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buf->data = (u8 *)__get_free_page(GFP_KERNEL);
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if (!buf->data)
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return -ENOMEM;
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buf->flags = 0;
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tpm_buf_reset(buf, tag, ordinal);
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return 0;
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}
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static inline void tpm_buf_destroy(struct tpm_buf *buf)
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{
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free_page((unsigned long)buf->data);
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}
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static inline u32 tpm_buf_length(struct tpm_buf *buf)
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{
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struct tpm_header *head = (struct tpm_header *)buf->data;
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return be32_to_cpu(head->length);
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}
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static inline u16 tpm_buf_tag(struct tpm_buf *buf)
|
||
|
|
{
|
||
|
|
struct tpm_header *head = (struct tpm_header *)buf->data;
|
||
|
|
|
||
|
|
return be16_to_cpu(head->tag);
|
||
|
|
}
|
||
|
|
|
||
|
|
static inline void tpm_buf_append(struct tpm_buf *buf,
|
||
|
|
const unsigned char *new_data,
|
||
|
|
unsigned int new_len)
|
||
|
|
{
|
||
|
|
struct tpm_header *head = (struct tpm_header *)buf->data;
|
||
|
|
u32 len = tpm_buf_length(buf);
|
||
|
|
|
||
|
|
/* Return silently if overflow has already happened. */
|
||
|
|
if (buf->flags & TPM_BUF_OVERFLOW)
|
||
|
|
return;
|
||
|
|
|
||
|
|
if ((len + new_len) > PAGE_SIZE) {
|
||
|
|
WARN(1, "tpm_buf: overflow\n");
|
||
|
|
buf->flags |= TPM_BUF_OVERFLOW;
|
||
|
|
return;
|
||
|
|
}
|
||
|
|
|
||
|
|
memcpy(&buf->data[len], new_data, new_len);
|
||
|
|
head->length = cpu_to_be32(len + new_len);
|
||
|
|
}
|
||
|
|
|
||
|
|
static inline void tpm_buf_append_u8(struct tpm_buf *buf, const u8 value)
|
||
|
|
{
|
||
|
|
tpm_buf_append(buf, &value, 1);
|
||
|
|
}
|
||
|
|
|
||
|
|
static inline void tpm_buf_append_u16(struct tpm_buf *buf, const u16 value)
|
||
|
|
{
|
||
|
|
__be16 value2 = cpu_to_be16(value);
|
||
|
|
|
||
|
|
tpm_buf_append(buf, (u8 *) &value2, 2);
|
||
|
|
}
|
||
|
|
|
||
|
|
static inline void tpm_buf_append_u32(struct tpm_buf *buf, const u32 value)
|
||
|
|
{
|
||
|
|
__be32 value2 = cpu_to_be32(value);
|
||
|
|
|
||
|
|
tpm_buf_append(buf, (u8 *) &value2, 4);
|
||
|
|
}
|
||
|
|
|
||
|
|
/*
|
||
|
|
* Check if TPM device is in the firmware upgrade mode.
|
||
|
|
*/
|
||
|
|
static inline bool tpm_is_firmware_upgrade(struct tpm_chip *chip)
|
||
|
|
{
|
||
|
|
return chip->flags & TPM_CHIP_FLAG_FIRMWARE_UPGRADE;
|
||
|
|
}
|
||
|
|
|
||
|
|
static inline u32 tpm2_rc_value(u32 rc)
|
||
|
|
{
|
||
|
|
return (rc & BIT(7)) ? rc & 0xff : rc;
|
||
|
|
}
|
||
|
|
|
||
|
|
#if defined(CONFIG_TCG_TPM) || defined(CONFIG_TCG_TPM_MODULE)
|
||
|
|
|
||
|
|
extern int tpm_is_tpm2(struct tpm_chip *chip);
|
||
|
|
extern __must_check int tpm_try_get_ops(struct tpm_chip *chip);
|
||
|
|
extern void tpm_put_ops(struct tpm_chip *chip);
|
||
|
|
extern ssize_t tpm_transmit_cmd(struct tpm_chip *chip, struct tpm_buf *buf,
|
||
|
|
size_t min_rsp_body_length, const char *desc);
|
||
|
|
extern int tpm_pcr_read(struct tpm_chip *chip, u32 pcr_idx,
|
||
|
|
struct tpm_digest *digest);
|
||
|
|
extern int tpm_pcr_extend(struct tpm_chip *chip, u32 pcr_idx,
|
||
|
|
struct tpm_digest *digests);
|
||
|
|
extern int tpm_send(struct tpm_chip *chip, void *cmd, size_t buflen);
|
||
|
|
extern int tpm_get_random(struct tpm_chip *chip, u8 *data, size_t max);
|
||
|
|
extern struct tpm_chip *tpm_default_chip(void);
|
||
|
|
void tpm2_flush_context(struct tpm_chip *chip, u32 handle);
|
||
|
|
#else
|
||
|
|
static inline int tpm_is_tpm2(struct tpm_chip *chip)
|
||
|
|
{
|
||
|
|
return -ENODEV;
|
||
|
|
}
|
||
|
|
static inline int tpm_pcr_read(struct tpm_chip *chip, int pcr_idx,
|
||
|
|
struct tpm_digest *digest)
|
||
|
|
{
|
||
|
|
return -ENODEV;
|
||
|
|
}
|
||
|
|
|
||
|
|
static inline int tpm_pcr_extend(struct tpm_chip *chip, u32 pcr_idx,
|
||
|
|
struct tpm_digest *digests)
|
||
|
|
{
|
||
|
|
return -ENODEV;
|
||
|
|
}
|
||
|
|
|
||
|
|
static inline int tpm_send(struct tpm_chip *chip, void *cmd, size_t buflen)
|
||
|
|
{
|
||
|
|
return -ENODEV;
|
||
|
|
}
|
||
|
|
static inline int tpm_get_random(struct tpm_chip *chip, u8 *data, size_t max)
|
||
|
|
{
|
||
|
|
return -ENODEV;
|
||
|
|
}
|
||
|
|
|
||
|
|
static inline struct tpm_chip *tpm_default_chip(void)
|
||
|
|
{
|
||
|
|
return NULL;
|
||
|
|
}
|
||
|
|
#endif
|
||
|
|
#endif
|