Пример #1
0
static ssize_t tpm_show_ppi_request(struct device *dev,
				    struct device_attribute *attr, char *buf)
{
	ssize_t size = -EINVAL;
	union acpi_object *obj;
	struct tpm_chip *chip = to_tpm_chip(dev);

	obj = tpm_eval_dsm(chip->acpi_dev_handle, TPM_PPI_FN_GETREQ,
			   ACPI_TYPE_PACKAGE, NULL);
	if (!obj)
		return -ENXIO;

	/*
	 * output.pointer should be of package type, including two integers.
	 * The first is function return code, 0 means success and 1 means
	 * error. The second is pending TPM operation requested by the OS, 0
	 * means none and >0 means operation value.
	 */
	if (obj->package.count == 2 &&
	    obj->package.elements[0].type == ACPI_TYPE_INTEGER &&
	    obj->package.elements[1].type == ACPI_TYPE_INTEGER) {
		if (obj->package.elements[0].integer.value)
			size = -EFAULT;
		else
			size = scnprintf(buf, PAGE_SIZE, "%llu\n",
				 obj->package.elements[1].integer.value);
	}

	ACPI_FREE(obj);

	return size;
}
Пример #2
0
static ssize_t pubek_show(struct device *dev, struct device_attribute *attr,
			  char *buf)
{
	struct tpm_buf tpm_buf;
	struct tpm_readpubek_out *out;
	ssize_t rc;
	int i;
	char *str = buf;
	struct tpm_chip *chip = to_tpm_chip(dev);
	char anti_replay[20];

	memset(&anti_replay, 0, sizeof(anti_replay));

	rc = tpm_buf_init(&tpm_buf, TPM_TAG_RQU_COMMAND, TPM_ORD_READPUBEK);
	if (rc)
		return rc;

	tpm_buf_append(&tpm_buf, anti_replay, sizeof(anti_replay));

	rc = tpm_transmit_cmd(chip, NULL, tpm_buf.data, PAGE_SIZE,
			      READ_PUBEK_RESULT_MIN_BODY_SIZE, 0,
			      "attempting to read the PUBEK");
	if (rc) {
		tpm_buf_destroy(&tpm_buf);
		return 0;
	}

	out = (struct tpm_readpubek_out *)&tpm_buf.data[10];
	str +=
	    sprintf(str,
		    "Algorithm: %02X %02X %02X %02X\n"
		    "Encscheme: %02X %02X\n"
		    "Sigscheme: %02X %02X\n"
		    "Parameters: %02X %02X %02X %02X "
		    "%02X %02X %02X %02X "
		    "%02X %02X %02X %02X\n"
		    "Modulus length: %d\n"
		    "Modulus:\n",
		    out->algorithm[0], out->algorithm[1], out->algorithm[2],
		    out->algorithm[3],
		    out->encscheme[0], out->encscheme[1],
		    out->sigscheme[0], out->sigscheme[1],
		    out->parameters[0], out->parameters[1],
		    out->parameters[2], out->parameters[3],
		    out->parameters[4], out->parameters[5],
		    out->parameters[6], out->parameters[7],
		    out->parameters[8], out->parameters[9],
		    out->parameters[10], out->parameters[11],
		    be32_to_cpu(out->keysize));

	for (i = 0; i < 256; i++) {
		str += sprintf(str, "%02X ", out->modulus[i]);
		if ((i + 1) % 16 == 0)
			str += sprintf(str, "\n");
	}

	rc = str - buf;
	tpm_buf_destroy(&tpm_buf);
	return rc;
}
Пример #3
0
static ssize_t tpm_show_ppi_version(struct device *dev,
				    struct device_attribute *attr, char *buf)
{
	struct tpm_chip *chip = to_tpm_chip(dev);

	return scnprintf(buf, PAGE_SIZE, "%s\n", chip->ppi_version);
}
Пример #4
0
static ssize_t pcrs_show(struct device *dev, struct device_attribute *attr,
			 char *buf)
{
	cap_t cap;
	u8 digest[TPM_DIGEST_SIZE];
	ssize_t rc;
	u32 i, j, num_pcrs;
	char *str = buf;
	struct tpm_chip *chip = to_tpm_chip(dev);

	rc = tpm1_getcap(chip, TPM_CAP_PROP_PCR, &cap,
			 "attempting to determine the number of PCRS",
			 sizeof(cap.num_pcrs));
	if (rc)
		return 0;

	num_pcrs = be32_to_cpu(cap.num_pcrs);
	for (i = 0; i < num_pcrs; i++) {
		rc = tpm1_pcr_read(chip, i, digest);
		if (rc)
			break;
		str += sprintf(str, "PCR-%02d: ", i);
		for (j = 0; j < TPM_DIGEST_SIZE; j++)
			str += sprintf(str, "%02X ", digest[j]);
		str += sprintf(str, "\n");
	}
	return str - buf;
}
Пример #5
0
static ssize_t tpm_show_ppi_tcg_operations(struct device *dev,
					   struct device_attribute *attr,
					   char *buf)
{
	struct tpm_chip *chip = to_tpm_chip(dev);

	return show_ppi_operations(chip->acpi_dev_handle, buf, 0,
				   PPI_TPM_REQ_MAX);
}
Пример #6
0
static ssize_t tpm_show_ppi_vs_operations(struct device *dev,
					  struct device_attribute *attr,
					  char *buf)
{
	struct tpm_chip *chip = to_tpm_chip(dev);

	return show_ppi_operations(chip->acpi_dev_handle, buf, PPI_VS_REQ_START,
				   PPI_VS_REQ_END);
}
Пример #7
0
static ssize_t cancel_store(struct device *dev, struct device_attribute *attr,
			    const char *buf, size_t count)
{
	struct tpm_chip *chip = to_tpm_chip(dev);
	if (chip == NULL)
		return 0;

	chip->ops->cancel(chip);
	return count;
}
Пример #8
0
static ssize_t pubek_show(struct device *dev, struct device_attribute *attr,
			  char *buf)
{
	u8 *data;
	struct tpm_cmd_t tpm_cmd;
	ssize_t err;
	int i, rc;
	char *str = buf;

	struct tpm_chip *chip = to_tpm_chip(dev);

	tpm_cmd.header.in = tpm_readpubek_header;
	err = tpm_transmit_cmd(chip, &tpm_cmd, READ_PUBEK_RESULT_SIZE, 0,
			       "attempting to read the PUBEK");
	if (err)
		goto out;

	/*
	   ignore header 10 bytes
	   algorithm 32 bits (1 == RSA )
	   encscheme 16 bits
	   sigscheme 16 bits
	   parameters (RSA 12->bytes: keybit, #primes, expbit)
	   keylenbytes 32 bits
	   256 byte modulus
	   ignore checksum 20 bytes
	 */
	data = tpm_cmd.params.readpubek_out_buffer;
	str +=
	    sprintf(str,
		    "Algorithm: %02X %02X %02X %02X\n"
		    "Encscheme: %02X %02X\n"
		    "Sigscheme: %02X %02X\n"
		    "Parameters: %02X %02X %02X %02X "
		    "%02X %02X %02X %02X "
		    "%02X %02X %02X %02X\n"
		    "Modulus length: %d\n"
		    "Modulus:\n",
		    data[0], data[1], data[2], data[3],
		    data[4], data[5],
		    data[6], data[7],
		    data[12], data[13], data[14], data[15],
		    data[16], data[17], data[18], data[19],
		    data[20], data[21], data[22], data[23],
		    be32_to_cpu(*((__be32 *) (data + 24))));

	for (i = 0; i < 256; i++) {
		str += sprintf(str, "%02X ", data[i + 28]);
		if ((i + 1) % 16 == 0)
			str += sprintf(str, "\n");
	}
out:
	rc = str - buf;
	return rc;
}
Пример #9
0
static ssize_t tpm_store_ppi_request(struct device *dev,
				     struct device_attribute *attr,
				     const char *buf, size_t count)
{
	u32 req;
	u64 ret;
	int func = TPM_PPI_FN_SUBREQ;
	union acpi_object *obj, tmp;
	union acpi_object argv4 = ACPI_INIT_DSM_ARGV4(1, &tmp);
	struct tpm_chip *chip = to_tpm_chip(dev);

	/*
	 * the function to submit TPM operation request to pre-os environment
	 * is updated with function index from SUBREQ to SUBREQ2 since PPI
	 * version 1.1
	 */
	if (acpi_check_dsm(chip->acpi_dev_handle, tpm_ppi_uuid,
			   TPM_PPI_REVISION_ID, 1 << TPM_PPI_FN_SUBREQ2))
		func = TPM_PPI_FN_SUBREQ2;

	/*
	 * PPI spec defines params[3].type as ACPI_TYPE_PACKAGE. Some BIOS
	 * accept buffer/string/integer type, but some BIOS accept buffer/
	 * string/package type. For PPI version 1.0 and 1.1, use buffer type
	 * for compatibility, and use package type since 1.2 according to spec.
	 */
	if (strcmp(chip->ppi_version, "1.2") < 0) {
		if (sscanf(buf, "%d", &req) != 1)
			return -EINVAL;
		argv4.type = ACPI_TYPE_BUFFER;
		argv4.buffer.length = sizeof(req);
		argv4.buffer.pointer = (u8 *)&req;
	} else {
		tmp.type = ACPI_TYPE_INTEGER;
		if (sscanf(buf, "%llu", &tmp.integer.value) != 1)
			return -EINVAL;
	}

	obj = tpm_eval_dsm(chip->acpi_dev_handle, func, ACPI_TYPE_INTEGER,
			   &argv4);
	if (!obj) {
		return -ENXIO;
	} else {
		ret = obj->integer.value;
		ACPI_FREE(obj);
	}

	if (ret == 0)
		return (acpi_status)count;

	return (ret == 1) ? -EPERM : -EFAULT;
}
Пример #10
0
static ssize_t timeouts_show(struct device *dev, struct device_attribute *attr,
			     char *buf)
{
	struct tpm_chip *chip = to_tpm_chip(dev);

	return sprintf(buf, "%d %d %d %d [%s]\n",
		       jiffies_to_usecs(chip->timeout_a),
		       jiffies_to_usecs(chip->timeout_b),
		       jiffies_to_usecs(chip->timeout_c),
		       jiffies_to_usecs(chip->timeout_d),
		       chip->timeout_adjusted
		       ? "adjusted" : "original");
}
Пример #11
0
static ssize_t owned_show(struct device *dev, struct device_attribute *attr,
			  char *buf)
{
	cap_t cap;
	ssize_t rc;

	rc = tpm_getcap(to_tpm_chip(dev), TPM_CAP_PROP_OWNER, &cap,
			"attempting to determine the owner state");
	if (rc)
		return 0;

	rc = sprintf(buf, "%d\n", cap.owned);
	return rc;
}
Пример #12
0
static ssize_t active_show(struct device *dev, struct device_attribute *attr,
		    char *buf)
{
	cap_t cap;
	ssize_t rc;

	rc = tpm_getcap(to_tpm_chip(dev), TPM_CAP_FLAG_PERM, &cap,
			"attempting to determine the permanent active state");
	if (rc)
		return 0;

	rc = sprintf(buf, "%d\n", !cap.perm_flags.deactivated);
	return rc;
}
Пример #13
0
static ssize_t temp_deactivated_show(struct device *dev,
				     struct device_attribute *attr, char *buf)
{
	cap_t cap;
	ssize_t rc;

	rc = tpm_getcap(to_tpm_chip(dev), TPM_CAP_FLAG_VOL, &cap,
			"attempting to determine the temporary state");
	if (rc)
		return 0;

	rc = sprintf(buf, "%d\n", cap.stclear_flags.deactivated);
	return rc;
}
Пример #14
0
static ssize_t enabled_show(struct device *dev, struct device_attribute *attr,
		     char *buf)
{
	cap_t cap;
	ssize_t rc;

	rc = tpm1_getcap(to_tpm_chip(dev), TPM_CAP_FLAG_PERM, &cap,
			 "attempting to determine the permanent enabled state",
			 sizeof(cap.perm_flags));
	if (rc)
		return 0;

	rc = sprintf(buf, "%d\n", !cap.perm_flags.disable);
	return rc;
}
Пример #15
0
static ssize_t durations_show(struct device *dev, struct device_attribute *attr,
			      char *buf)
{
	struct tpm_chip *chip = to_tpm_chip(dev);

	if (chip->duration[TPM_LONG] == 0)
		return 0;

	return sprintf(buf, "%d %d %d [%s]\n",
		       jiffies_to_usecs(chip->duration[TPM_SHORT]),
		       jiffies_to_usecs(chip->duration[TPM_MEDIUM]),
		       jiffies_to_usecs(chip->duration[TPM_LONG]),
		       chip->duration_adjusted
		       ? "adjusted" : "original");
}
Пример #16
0
static ssize_t caps_show(struct device *dev, struct device_attribute *attr,
			 char *buf)
{
	struct tpm_chip *chip = to_tpm_chip(dev);
	cap_t cap;
	ssize_t rc;
	char *str = buf;

	rc = tpm1_getcap(chip, TPM_CAP_PROP_MANUFACTURER, &cap,
			 "attempting to determine the manufacturer",
			 sizeof(cap.manufacturer_id));
	if (rc)
		return 0;
	str += sprintf(str, "Manufacturer: 0x%x\n",
		       be32_to_cpu(cap.manufacturer_id));

	/* Try to get a TPM version 1.2 TPM_CAP_VERSION_INFO */
	rc = tpm1_getcap(chip, TPM_CAP_VERSION_1_2, &cap,
			 "attempting to determine the 1.2 version",
			 sizeof(cap.tpm_version_1_2));
	if (!rc) {
		str += sprintf(str,
			       "TCG version: %d.%d\nFirmware version: %d.%d\n",
			       cap.tpm_version_1_2.Major,
			       cap.tpm_version_1_2.Minor,
			       cap.tpm_version_1_2.revMajor,
			       cap.tpm_version_1_2.revMinor);
	} else {
		/* Otherwise just use TPM_STRUCT_VER */
		rc = tpm1_getcap(chip, TPM_CAP_VERSION_1_1, &cap,
				 "attempting to determine the 1.1 version",
				 sizeof(cap.tpm_version));
		if (rc)
			return 0;
		str += sprintf(str,
			       "TCG version: %d.%d\nFirmware version: %d.%d\n",
			       cap.tpm_version.Major,
			       cap.tpm_version.Minor,
			       cap.tpm_version.revMajor,
			       cap.tpm_version.revMinor);
	}

	return str - buf;
}
Пример #17
0
static ssize_t tpm_show_ppi_transition_action(struct device *dev,
					      struct device_attribute *attr,
					      char *buf)
{
	u32 ret;
	acpi_status status;
	union acpi_object *obj = NULL;
	union acpi_object tmp = {
		.buffer.type = ACPI_TYPE_BUFFER,
		.buffer.length = 0,
		.buffer.pointer = NULL
	};
	struct tpm_chip *chip = to_tpm_chip(dev);

	static char *info[] = {
		"None",
		"Shutdown",
		"Reboot",
		"OS Vendor-specific",
		"Error",
	};

	/*
	 * PPI spec defines params[3].type as empty package, but some platforms
	 * (e.g. Capella with PPI 1.0) need integer/string/buffer type, so for
	 * compatibility, define params[3].type as buffer, if PPI version < 1.2
	 */
	if (strcmp(chip->ppi_version, "1.2") < 0)
		obj = &tmp;
	obj = tpm_eval_dsm(chip->acpi_dev_handle, TPM_PPI_FN_GETACT,
			   ACPI_TYPE_INTEGER, obj);
	if (!obj) {
		return -ENXIO;
	} else {
		ret = obj->integer.value;
		ACPI_FREE(obj);
	}

	if (ret < ARRAY_SIZE(info) - 1)
		status = scnprintf(buf, PAGE_SIZE, "%d: %s\n", ret, info[ret]);
	else
		status = scnprintf(buf, PAGE_SIZE, "%d: %s\n", ret,
				   info[ARRAY_SIZE(info)-1]);
	return status;
}

static ssize_t tpm_show_ppi_response(struct device *dev,
				     struct device_attribute *attr,
				     char *buf)
{
	acpi_status status = -EINVAL;
	union acpi_object *obj, *ret_obj;
	u64 req, res;
	struct tpm_chip *chip = to_tpm_chip(dev);

	obj = tpm_eval_dsm(chip->acpi_dev_handle, TPM_PPI_FN_GETRSP,
			   ACPI_TYPE_PACKAGE, NULL);
	if (!obj)
		return -ENXIO;

	/*
	 * parameter output.pointer should be of package type, including
	 * 3 integers. The first means function return code, the second means
	 * most recent TPM operation request, and the last means response to
	 * the most recent TPM operation request. Only if the first is 0, and
	 * the second integer is not 0, the response makes sense.
	 */
	ret_obj = obj->package.elements;
	if (obj->package.count < 3 ||
	    ret_obj[0].type != ACPI_TYPE_INTEGER ||
	    ret_obj[1].type != ACPI_TYPE_INTEGER ||
	    ret_obj[2].type != ACPI_TYPE_INTEGER)
		goto cleanup;

	if (ret_obj[0].integer.value) {
		status = -EFAULT;
		goto cleanup;
	}

	req = ret_obj[1].integer.value;
	res = ret_obj[2].integer.value;
	if (req) {
		if (res == 0)
			status = scnprintf(buf, PAGE_SIZE, "%llu %s\n", req,
					   "0: Success");
		else if (res == 0xFFFFFFF0)
			status = scnprintf(buf, PAGE_SIZE, "%llu %s\n", req,
					   "0xFFFFFFF0: User Abort");
		else if (res == 0xFFFFFFF1)
			status = scnprintf(buf, PAGE_SIZE, "%llu %s\n", req,
					   "0xFFFFFFF1: BIOS Failure");
		else if (res >= 1 && res <= 0x00000FFF)
			status = scnprintf(buf, PAGE_SIZE, "%llu %llu: %s\n",
					   req, res, "Corresponding TPM error");
		else
			status = scnprintf(buf, PAGE_SIZE, "%llu %llu: %s\n",
					   req, res, "Error");
	} else {
		status = scnprintf(buf, PAGE_SIZE, "%llu: %s\n",
				   req, "No Recent Request");
	}

cleanup:
	ACPI_FREE(obj);
	return status;
}