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;
}
/**
* tpm_send - send a TPM command
* @chip: a &struct tpm_chip instance, %NULL for the default chip
* @cmd: a TPM command buffer
* @buflen: the length of the TPM command buffer
*
* Return: same as with tpm_transmit_cmd()
*/
int tpm_send(struct tpm_chip *chip, void *cmd, size_t buflen)
{
struct tpm_buf buf;
int rc;
chip = tpm_find_get_ops(chip);
if (!chip)
return -ENODEV;
rc = tpm_buf_init(&buf, 0, 0);
if (rc)
goto out;
memcpy(buf.data, cmd, buflen);
rc = tpm_transmit_cmd(chip, &buf, 0, "attempting to a send a command");
tpm_buf_destroy(&buf);
out:
tpm_put_ops(chip);
return rc;
}
static int vtpm_proxy_request_locality(struct tpm_chip *chip, int locality)
{
struct tpm_buf buf;
int rc;
const struct tpm_output_header *header;
struct proxy_dev *proxy_dev = dev_get_drvdata(&chip->dev);
if (chip->flags & TPM_CHIP_FLAG_TPM2)
rc = tpm_buf_init(&buf, TPM2_ST_SESSIONS,
TPM2_CC_SET_LOCALITY);
else
rc = tpm_buf_init(&buf, TPM_TAG_RQU_COMMAND,
TPM_ORD_SET_LOCALITY);
if (rc)
return rc;
tpm_buf_append_u8(&buf, locality);
proxy_dev->state |= STATE_DRIVER_COMMAND;
rc = tpm_transmit_cmd(chip, NULL, buf.data, tpm_buf_length(&buf), 0,
TPM_TRANSMIT_UNLOCKED | TPM_TRANSMIT_RAW,
"attempting to set locality");
proxy_dev->state &= ~STATE_DRIVER_COMMAND;
if (rc < 0) {
locality = rc;
goto out;
}
header = (const struct tpm_output_header *)buf.data;
rc = be32_to_cpu(header->return_code);
if (rc)
locality = -1;
out:
tpm_buf_destroy(&buf);
return locality;
}
