linux_dsm_epyc7002/drivers/char/tpm/eventlog/tpm1.c
Thomas Gleixner 2874c5fd28 treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 152
Based on 1 normalized pattern(s):

  this program is free software you can redistribute it and or modify
  it under the terms of the gnu general public license as published by
  the free software foundation either version 2 of the license or at
  your option any later version

extracted by the scancode license scanner the SPDX license identifier

  GPL-2.0-or-later

has been chosen to replace the boilerplate/reference in 3029 file(s).

Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Reviewed-by: Allison Randal <allison@lohutok.net>
Cc: linux-spdx@vger.kernel.org
Link: https://lkml.kernel.org/r/20190527070032.746973796@linutronix.de
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2019-05-30 11:26:32 -07:00

297 lines
6.9 KiB
C

// SPDX-License-Identifier: GPL-2.0-or-later
/*
* Copyright (C) 2005, 2012 IBM Corporation
*
* Authors:
* Kent Yoder <key@linux.vnet.ibm.com>
* Seiji Munetoh <munetoh@jp.ibm.com>
* Stefan Berger <stefanb@us.ibm.com>
* Reiner Sailer <sailer@watson.ibm.com>
* Kylene Hall <kjhall@us.ibm.com>
* Nayna Jain <nayna@linux.vnet.ibm.com>
*
* Maintained by: <tpmdd-devel@lists.sourceforge.net>
*
* Access to the event log created by a system's firmware / BIOS
*/
#include <linux/seq_file.h>
#include <linux/efi.h>
#include <linux/fs.h>
#include <linux/security.h>
#include <linux/module.h>
#include <linux/slab.h>
#include <linux/tpm_eventlog.h>
#include "../tpm.h"
#include "common.h"
static const char* tcpa_event_type_strings[] = {
"PREBOOT",
"POST CODE",
"",
"NO ACTION",
"SEPARATOR",
"ACTION",
"EVENT TAG",
"S-CRTM Contents",
"S-CRTM Version",
"CPU Microcode",
"Platform Config Flags",
"Table of Devices",
"Compact Hash",
"IPL",
"IPL Partition Data",
"Non-Host Code",
"Non-Host Config",
"Non-Host Info"
};
static const char* tcpa_pc_event_id_strings[] = {
"",
"SMBIOS",
"BIS Certificate",
"POST BIOS ",
"ESCD ",
"CMOS",
"NVRAM",
"Option ROM",
"Option ROM config",
"",
"Option ROM microcode ",
"S-CRTM Version",
"S-CRTM Contents ",
"POST Contents ",
"Table of Devices",
};
/* returns pointer to start of pos. entry of tcg log */
static void *tpm1_bios_measurements_start(struct seq_file *m, loff_t *pos)
{
loff_t i = 0;
struct tpm_chip *chip = m->private;
struct tpm_bios_log *log = &chip->log;
void *addr = log->bios_event_log;
void *limit = log->bios_event_log_end;
struct tcpa_event *event;
u32 converted_event_size;
u32 converted_event_type;
/* read over *pos measurements */
do {
event = addr;
/* check if current entry is valid */
if (addr + sizeof(struct tcpa_event) > limit)
return NULL;
converted_event_size =
do_endian_conversion(event->event_size);
converted_event_type =
do_endian_conversion(event->event_type);
if (((converted_event_type == 0) && (converted_event_size == 0))
|| ((addr + sizeof(struct tcpa_event) + converted_event_size)
> limit))
return NULL;
if (i++ == *pos)
break;
addr += (sizeof(struct tcpa_event) + converted_event_size);
} while (1);
return addr;
}
static void *tpm1_bios_measurements_next(struct seq_file *m, void *v,
loff_t *pos)
{
struct tcpa_event *event = v;
struct tpm_chip *chip = m->private;
struct tpm_bios_log *log = &chip->log;
void *limit = log->bios_event_log_end;
u32 converted_event_size;
u32 converted_event_type;
converted_event_size = do_endian_conversion(event->event_size);
v += sizeof(struct tcpa_event) + converted_event_size;
/* now check if current entry is valid */
if ((v + sizeof(struct tcpa_event)) > limit)
return NULL;
event = v;
converted_event_size = do_endian_conversion(event->event_size);
converted_event_type = do_endian_conversion(event->event_type);
if (((converted_event_type == 0) && (converted_event_size == 0)) ||
((v + sizeof(struct tcpa_event) + converted_event_size) > limit))
return NULL;
(*pos)++;
return v;
}
static void tpm1_bios_measurements_stop(struct seq_file *m, void *v)
{
}
static int get_event_name(char *dest, struct tcpa_event *event,
unsigned char * event_entry)
{
const char *name = "";
/* 41 so there is room for 40 data and 1 nul */
char data[41] = "";
int i, n_len = 0, d_len = 0;
struct tcpa_pc_event *pc_event;
switch (do_endian_conversion(event->event_type)) {
case PREBOOT:
case POST_CODE:
case UNUSED:
case NO_ACTION:
case SCRTM_CONTENTS:
case SCRTM_VERSION:
case CPU_MICROCODE:
case PLATFORM_CONFIG_FLAGS:
case TABLE_OF_DEVICES:
case COMPACT_HASH:
case IPL:
case IPL_PARTITION_DATA:
case NONHOST_CODE:
case NONHOST_CONFIG:
case NONHOST_INFO:
name = tcpa_event_type_strings[do_endian_conversion
(event->event_type)];
n_len = strlen(name);
break;
case SEPARATOR:
case ACTION:
if (MAX_TEXT_EVENT >
do_endian_conversion(event->event_size)) {
name = event_entry;
n_len = do_endian_conversion(event->event_size);
}
break;
case EVENT_TAG:
pc_event = (struct tcpa_pc_event *)event_entry;
/* ToDo Row data -> Base64 */
switch (do_endian_conversion(pc_event->event_id)) {
case SMBIOS:
case BIS_CERT:
case CMOS:
case NVRAM:
case OPTION_ROM_EXEC:
case OPTION_ROM_CONFIG:
case S_CRTM_VERSION:
name = tcpa_pc_event_id_strings[do_endian_conversion
(pc_event->event_id)];
n_len = strlen(name);
break;
/* hash data */
case POST_BIOS_ROM:
case ESCD:
case OPTION_ROM_MICROCODE:
case S_CRTM_CONTENTS:
case POST_CONTENTS:
name = tcpa_pc_event_id_strings[do_endian_conversion
(pc_event->event_id)];
n_len = strlen(name);
for (i = 0; i < 20; i++)
d_len += sprintf(&data[2*i], "%02x",
pc_event->event_data[i]);
break;
default:
break;
}
default:
break;
}
return snprintf(dest, MAX_TEXT_EVENT, "[%.*s%.*s]",
n_len, name, d_len, data);
}
static int tpm1_binary_bios_measurements_show(struct seq_file *m, void *v)
{
struct tcpa_event *event = v;
struct tcpa_event temp_event;
char *temp_ptr;
int i;
memcpy(&temp_event, event, sizeof(struct tcpa_event));
/* convert raw integers for endianness */
temp_event.pcr_index = do_endian_conversion(event->pcr_index);
temp_event.event_type = do_endian_conversion(event->event_type);
temp_event.event_size = do_endian_conversion(event->event_size);
temp_ptr = (char *) &temp_event;
for (i = 0; i < (sizeof(struct tcpa_event) - 1) ; i++)
seq_putc(m, temp_ptr[i]);
temp_ptr = (char *) v;
for (i = (sizeof(struct tcpa_event) - 1);
i < (sizeof(struct tcpa_event) + temp_event.event_size); i++)
seq_putc(m, temp_ptr[i]);
return 0;
}
static int tpm1_ascii_bios_measurements_show(struct seq_file *m, void *v)
{
int len = 0;
char *eventname;
struct tcpa_event *event = v;
unsigned char *event_entry =
(unsigned char *)(v + sizeof(struct tcpa_event));
eventname = kmalloc(MAX_TEXT_EVENT, GFP_KERNEL);
if (!eventname) {
printk(KERN_ERR "%s: ERROR - No Memory for event name\n ",
__func__);
return -EFAULT;
}
/* 1st: PCR */
seq_printf(m, "%2d ", do_endian_conversion(event->pcr_index));
/* 2nd: SHA1 */
seq_printf(m, "%20phN", event->pcr_value);
/* 3rd: event type identifier */
seq_printf(m, " %02x", do_endian_conversion(event->event_type));
len += get_event_name(eventname, event, event_entry);
/* 4th: eventname <= max + \'0' delimiter */
seq_printf(m, " %s\n", eventname);
kfree(eventname);
return 0;
}
const struct seq_operations tpm1_ascii_b_measurements_seqops = {
.start = tpm1_bios_measurements_start,
.next = tpm1_bios_measurements_next,
.stop = tpm1_bios_measurements_stop,
.show = tpm1_ascii_bios_measurements_show,
};
const struct seq_operations tpm1_binary_b_measurements_seqops = {
.start = tpm1_bios_measurements_start,
.next = tpm1_bios_measurements_next,
.stop = tpm1_bios_measurements_stop,
.show = tpm1_binary_bios_measurements_show,
};