Contributors: 13
| Author |
Tokens |
Token Proportion |
Commits |
Commit Proportion |
| Kylene Jo Hall |
809 |
69.74% |
4 |
18.18% |
| Hon Ching (Vicky) Lo |
158 |
13.62% |
1 |
4.55% |
| Harald Hoyer |
52 |
4.48% |
1 |
4.55% |
| Seiji Munetoh |
46 |
3.97% |
2 |
9.09% |
| jia zhang |
35 |
3.02% |
2 |
9.09% |
| Nayna Jain |
24 |
2.07% |
1 |
4.55% |
| Thiébaud Weksteen |
23 |
1.98% |
5 |
22.73% |
| Tejun Heo |
3 |
0.26% |
1 |
4.55% |
| Andrew Morton |
3 |
0.26% |
1 |
4.55% |
| James Morris |
2 |
0.17% |
1 |
4.55% |
| Thomas Gleixner |
2 |
0.17% |
1 |
4.55% |
| Eric Paris |
2 |
0.17% |
1 |
4.55% |
| Andy Shevchenko |
1 |
0.09% |
1 |
4.55% |
| Total |
1160 |
|
22 |
|
// 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,
};