12874c5fdSThomas Gleixner // SPDX-License-Identifier: GPL-2.0-or-later 20bfb2374SThiebaud Weksteen /* 30bfb2374SThiebaud Weksteen * Copyright (C) 2005, 2012 IBM Corporation 40bfb2374SThiebaud Weksteen * 50bfb2374SThiebaud Weksteen * Authors: 60bfb2374SThiebaud Weksteen * Kent Yoder <key@linux.vnet.ibm.com> 70bfb2374SThiebaud Weksteen * Seiji Munetoh <munetoh@jp.ibm.com> 80bfb2374SThiebaud Weksteen * Stefan Berger <stefanb@us.ibm.com> 90bfb2374SThiebaud Weksteen * Reiner Sailer <sailer@watson.ibm.com> 100bfb2374SThiebaud Weksteen * Kylene Hall <kjhall@us.ibm.com> 110bfb2374SThiebaud Weksteen * Nayna Jain <nayna@linux.vnet.ibm.com> 120bfb2374SThiebaud Weksteen * 130bfb2374SThiebaud Weksteen * Maintained by: <tpmdd-devel@lists.sourceforge.net> 140bfb2374SThiebaud Weksteen * 150bfb2374SThiebaud Weksteen * Access to the event log created by a system's firmware / BIOS 160bfb2374SThiebaud Weksteen */ 170bfb2374SThiebaud Weksteen 180bfb2374SThiebaud Weksteen #include <linux/seq_file.h> 190bfb2374SThiebaud Weksteen #include <linux/efi.h> 200bfb2374SThiebaud Weksteen #include <linux/fs.h> 210bfb2374SThiebaud Weksteen #include <linux/security.h> 220bfb2374SThiebaud Weksteen #include <linux/module.h> 230bfb2374SThiebaud Weksteen #include <linux/slab.h> 240bfb2374SThiebaud Weksteen #include <linux/tpm_eventlog.h> 250bfb2374SThiebaud Weksteen 260bfb2374SThiebaud Weksteen #include "../tpm.h" 2775d647f5SThiebaud Weksteen #include "common.h" 280bfb2374SThiebaud Weksteen 290bfb2374SThiebaud Weksteen 300bfb2374SThiebaud Weksteen static const char* tcpa_event_type_strings[] = { 310bfb2374SThiebaud Weksteen "PREBOOT", 320bfb2374SThiebaud Weksteen "POST CODE", 330bfb2374SThiebaud Weksteen "", 340bfb2374SThiebaud Weksteen "NO ACTION", 350bfb2374SThiebaud Weksteen "SEPARATOR", 360bfb2374SThiebaud Weksteen "ACTION", 370bfb2374SThiebaud Weksteen "EVENT TAG", 380bfb2374SThiebaud Weksteen "S-CRTM Contents", 390bfb2374SThiebaud Weksteen "S-CRTM Version", 400bfb2374SThiebaud Weksteen "CPU Microcode", 410bfb2374SThiebaud Weksteen "Platform Config Flags", 420bfb2374SThiebaud Weksteen "Table of Devices", 430bfb2374SThiebaud Weksteen "Compact Hash", 440bfb2374SThiebaud Weksteen "IPL", 450bfb2374SThiebaud Weksteen "IPL Partition Data", 460bfb2374SThiebaud Weksteen "Non-Host Code", 470bfb2374SThiebaud Weksteen "Non-Host Config", 480bfb2374SThiebaud Weksteen "Non-Host Info" 490bfb2374SThiebaud Weksteen }; 500bfb2374SThiebaud Weksteen 510bfb2374SThiebaud Weksteen static const char* tcpa_pc_event_id_strings[] = { 520bfb2374SThiebaud Weksteen "", 530bfb2374SThiebaud Weksteen "SMBIOS", 540bfb2374SThiebaud Weksteen "BIS Certificate", 550bfb2374SThiebaud Weksteen "POST BIOS ", 560bfb2374SThiebaud Weksteen "ESCD ", 570bfb2374SThiebaud Weksteen "CMOS", 580bfb2374SThiebaud Weksteen "NVRAM", 590bfb2374SThiebaud Weksteen "Option ROM", 600bfb2374SThiebaud Weksteen "Option ROM config", 610bfb2374SThiebaud Weksteen "", 620bfb2374SThiebaud Weksteen "Option ROM microcode ", 630bfb2374SThiebaud Weksteen "S-CRTM Version", 640bfb2374SThiebaud Weksteen "S-CRTM Contents ", 650bfb2374SThiebaud Weksteen "POST Contents ", 660bfb2374SThiebaud Weksteen "Table of Devices", 670bfb2374SThiebaud Weksteen }; 680bfb2374SThiebaud Weksteen 690bfb2374SThiebaud Weksteen /* returns pointer to start of pos. entry of tcg log */ 709b01b535SThiebaud Weksteen static void *tpm1_bios_measurements_start(struct seq_file *m, loff_t *pos) 710bfb2374SThiebaud Weksteen { 72bb3b6b0fSJia Zhang loff_t i = 0; 730bfb2374SThiebaud Weksteen struct tpm_chip *chip = m->private; 740bfb2374SThiebaud Weksteen struct tpm_bios_log *log = &chip->log; 750bfb2374SThiebaud Weksteen void *addr = log->bios_event_log; 760bfb2374SThiebaud Weksteen void *limit = log->bios_event_log_end; 770bfb2374SThiebaud Weksteen struct tcpa_event *event; 780bfb2374SThiebaud Weksteen u32 converted_event_size; 790bfb2374SThiebaud Weksteen u32 converted_event_type; 800bfb2374SThiebaud Weksteen 810bfb2374SThiebaud Weksteen /* read over *pos measurements */ 82bb3b6b0fSJia Zhang do { 830bfb2374SThiebaud Weksteen event = addr; 840bfb2374SThiebaud Weksteen 85bb3b6b0fSJia Zhang /* check if current entry is valid */ 8664494d39SJia Zhang if (addr + sizeof(struct tcpa_event) > limit) 87bb3b6b0fSJia Zhang return NULL; 88bb3b6b0fSJia Zhang 890bfb2374SThiebaud Weksteen converted_event_size = 900bfb2374SThiebaud Weksteen do_endian_conversion(event->event_size); 910bfb2374SThiebaud Weksteen converted_event_type = 920bfb2374SThiebaud Weksteen do_endian_conversion(event->event_type); 930bfb2374SThiebaud Weksteen 940bfb2374SThiebaud Weksteen if (((converted_event_type == 0) && (converted_event_size == 0)) 950bfb2374SThiebaud Weksteen || ((addr + sizeof(struct tcpa_event) + converted_event_size) 9664494d39SJia Zhang > limit)) 970bfb2374SThiebaud Weksteen return NULL; 980bfb2374SThiebaud Weksteen 99bb3b6b0fSJia Zhang if (i++ == *pos) 100bb3b6b0fSJia Zhang break; 101bb3b6b0fSJia Zhang 102bb3b6b0fSJia Zhang addr += (sizeof(struct tcpa_event) + converted_event_size); 103bb3b6b0fSJia Zhang } while (1); 104bb3b6b0fSJia Zhang 1050bfb2374SThiebaud Weksteen return addr; 1060bfb2374SThiebaud Weksteen } 1070bfb2374SThiebaud Weksteen 1089b01b535SThiebaud Weksteen static void *tpm1_bios_measurements_next(struct seq_file *m, void *v, 1090bfb2374SThiebaud Weksteen loff_t *pos) 1100bfb2374SThiebaud Weksteen { 1110bfb2374SThiebaud Weksteen struct tcpa_event *event = v; 1120bfb2374SThiebaud Weksteen struct tpm_chip *chip = m->private; 1130bfb2374SThiebaud Weksteen struct tpm_bios_log *log = &chip->log; 1140bfb2374SThiebaud Weksteen void *limit = log->bios_event_log_end; 1150bfb2374SThiebaud Weksteen u32 converted_event_size; 1160bfb2374SThiebaud Weksteen u32 converted_event_type; 1170bfb2374SThiebaud Weksteen 118d7a47b96SVasily Averin (*pos)++; 1190bfb2374SThiebaud Weksteen converted_event_size = do_endian_conversion(event->event_size); 1200bfb2374SThiebaud Weksteen 1210bfb2374SThiebaud Weksteen v += sizeof(struct tcpa_event) + converted_event_size; 1220bfb2374SThiebaud Weksteen 1230bfb2374SThiebaud Weksteen /* now check if current entry is valid */ 12464494d39SJia Zhang if ((v + sizeof(struct tcpa_event)) > limit) 1250bfb2374SThiebaud Weksteen return NULL; 1260bfb2374SThiebaud Weksteen 1270bfb2374SThiebaud Weksteen event = v; 1280bfb2374SThiebaud Weksteen 1290bfb2374SThiebaud Weksteen converted_event_size = do_endian_conversion(event->event_size); 1300bfb2374SThiebaud Weksteen converted_event_type = do_endian_conversion(event->event_type); 1310bfb2374SThiebaud Weksteen 1320bfb2374SThiebaud Weksteen if (((converted_event_type == 0) && (converted_event_size == 0)) || 13364494d39SJia Zhang ((v + sizeof(struct tcpa_event) + converted_event_size) > limit)) 1340bfb2374SThiebaud Weksteen return NULL; 1350bfb2374SThiebaud Weksteen 1360bfb2374SThiebaud Weksteen return v; 1370bfb2374SThiebaud Weksteen } 1380bfb2374SThiebaud Weksteen 1399b01b535SThiebaud Weksteen static void tpm1_bios_measurements_stop(struct seq_file *m, void *v) 1400bfb2374SThiebaud Weksteen { 1410bfb2374SThiebaud Weksteen } 1420bfb2374SThiebaud Weksteen 1430bfb2374SThiebaud Weksteen static int get_event_name(char *dest, struct tcpa_event *event, 1440bfb2374SThiebaud Weksteen unsigned char * event_entry) 1450bfb2374SThiebaud Weksteen { 1460bfb2374SThiebaud Weksteen const char *name = ""; 1470bfb2374SThiebaud Weksteen /* 41 so there is room for 40 data and 1 nul */ 1480bfb2374SThiebaud Weksteen char data[41] = ""; 1490bfb2374SThiebaud Weksteen int i, n_len = 0, d_len = 0; 1500bfb2374SThiebaud Weksteen struct tcpa_pc_event *pc_event; 1510bfb2374SThiebaud Weksteen 1520bfb2374SThiebaud Weksteen switch (do_endian_conversion(event->event_type)) { 1530bfb2374SThiebaud Weksteen case PREBOOT: 1540bfb2374SThiebaud Weksteen case POST_CODE: 1550bfb2374SThiebaud Weksteen case UNUSED: 1560bfb2374SThiebaud Weksteen case NO_ACTION: 1570bfb2374SThiebaud Weksteen case SCRTM_CONTENTS: 1580bfb2374SThiebaud Weksteen case SCRTM_VERSION: 1590bfb2374SThiebaud Weksteen case CPU_MICROCODE: 1600bfb2374SThiebaud Weksteen case PLATFORM_CONFIG_FLAGS: 1610bfb2374SThiebaud Weksteen case TABLE_OF_DEVICES: 1620bfb2374SThiebaud Weksteen case COMPACT_HASH: 1630bfb2374SThiebaud Weksteen case IPL: 1640bfb2374SThiebaud Weksteen case IPL_PARTITION_DATA: 1650bfb2374SThiebaud Weksteen case NONHOST_CODE: 1660bfb2374SThiebaud Weksteen case NONHOST_CONFIG: 1670bfb2374SThiebaud Weksteen case NONHOST_INFO: 1680bfb2374SThiebaud Weksteen name = tcpa_event_type_strings[do_endian_conversion 1690bfb2374SThiebaud Weksteen (event->event_type)]; 1700bfb2374SThiebaud Weksteen n_len = strlen(name); 1710bfb2374SThiebaud Weksteen break; 1720bfb2374SThiebaud Weksteen case SEPARATOR: 1730bfb2374SThiebaud Weksteen case ACTION: 1740bfb2374SThiebaud Weksteen if (MAX_TEXT_EVENT > 1750bfb2374SThiebaud Weksteen do_endian_conversion(event->event_size)) { 1760bfb2374SThiebaud Weksteen name = event_entry; 1770bfb2374SThiebaud Weksteen n_len = do_endian_conversion(event->event_size); 1780bfb2374SThiebaud Weksteen } 1790bfb2374SThiebaud Weksteen break; 1800bfb2374SThiebaud Weksteen case EVENT_TAG: 1810bfb2374SThiebaud Weksteen pc_event = (struct tcpa_pc_event *)event_entry; 1820bfb2374SThiebaud Weksteen 1830bfb2374SThiebaud Weksteen /* ToDo Row data -> Base64 */ 1840bfb2374SThiebaud Weksteen 1850bfb2374SThiebaud Weksteen switch (do_endian_conversion(pc_event->event_id)) { 1860bfb2374SThiebaud Weksteen case SMBIOS: 1870bfb2374SThiebaud Weksteen case BIS_CERT: 1880bfb2374SThiebaud Weksteen case CMOS: 1890bfb2374SThiebaud Weksteen case NVRAM: 1900bfb2374SThiebaud Weksteen case OPTION_ROM_EXEC: 1910bfb2374SThiebaud Weksteen case OPTION_ROM_CONFIG: 1920bfb2374SThiebaud Weksteen case S_CRTM_VERSION: 1930bfb2374SThiebaud Weksteen name = tcpa_pc_event_id_strings[do_endian_conversion 1940bfb2374SThiebaud Weksteen (pc_event->event_id)]; 1950bfb2374SThiebaud Weksteen n_len = strlen(name); 1960bfb2374SThiebaud Weksteen break; 1970bfb2374SThiebaud Weksteen /* hash data */ 1980bfb2374SThiebaud Weksteen case POST_BIOS_ROM: 1990bfb2374SThiebaud Weksteen case ESCD: 2000bfb2374SThiebaud Weksteen case OPTION_ROM_MICROCODE: 2010bfb2374SThiebaud Weksteen case S_CRTM_CONTENTS: 2020bfb2374SThiebaud Weksteen case POST_CONTENTS: 2030bfb2374SThiebaud Weksteen name = tcpa_pc_event_id_strings[do_endian_conversion 2040bfb2374SThiebaud Weksteen (pc_event->event_id)]; 2050bfb2374SThiebaud Weksteen n_len = strlen(name); 2060bfb2374SThiebaud Weksteen for (i = 0; i < 20; i++) 2070bfb2374SThiebaud Weksteen d_len += sprintf(&data[2*i], "%02x", 2080bfb2374SThiebaud Weksteen pc_event->event_data[i]); 2090bfb2374SThiebaud Weksteen break; 2100bfb2374SThiebaud Weksteen default: 2110bfb2374SThiebaud Weksteen break; 2120bfb2374SThiebaud Weksteen } 213*d87719c1SGustavo A. R. Silva break; 2140bfb2374SThiebaud Weksteen default: 2150bfb2374SThiebaud Weksteen break; 2160bfb2374SThiebaud Weksteen } 2170bfb2374SThiebaud Weksteen 2180bfb2374SThiebaud Weksteen return snprintf(dest, MAX_TEXT_EVENT, "[%.*s%.*s]", 2190bfb2374SThiebaud Weksteen n_len, name, d_len, data); 2200bfb2374SThiebaud Weksteen 2210bfb2374SThiebaud Weksteen } 2220bfb2374SThiebaud Weksteen 2239b01b535SThiebaud Weksteen static int tpm1_binary_bios_measurements_show(struct seq_file *m, void *v) 2240bfb2374SThiebaud Weksteen { 2250bfb2374SThiebaud Weksteen struct tcpa_event *event = v; 2260bfb2374SThiebaud Weksteen struct tcpa_event temp_event; 2270bfb2374SThiebaud Weksteen char *temp_ptr; 2280bfb2374SThiebaud Weksteen int i; 2290bfb2374SThiebaud Weksteen 2300bfb2374SThiebaud Weksteen memcpy(&temp_event, event, sizeof(struct tcpa_event)); 2310bfb2374SThiebaud Weksteen 2320bfb2374SThiebaud Weksteen /* convert raw integers for endianness */ 2330bfb2374SThiebaud Weksteen temp_event.pcr_index = do_endian_conversion(event->pcr_index); 2340bfb2374SThiebaud Weksteen temp_event.event_type = do_endian_conversion(event->event_type); 2350bfb2374SThiebaud Weksteen temp_event.event_size = do_endian_conversion(event->event_size); 2360bfb2374SThiebaud Weksteen 2370bfb2374SThiebaud Weksteen temp_ptr = (char *) &temp_event; 2380bfb2374SThiebaud Weksteen 2390bfb2374SThiebaud Weksteen for (i = 0; i < (sizeof(struct tcpa_event) - 1) ; i++) 2400bfb2374SThiebaud Weksteen seq_putc(m, temp_ptr[i]); 2410bfb2374SThiebaud Weksteen 2420bfb2374SThiebaud Weksteen temp_ptr = (char *) v; 2430bfb2374SThiebaud Weksteen 2440bfb2374SThiebaud Weksteen for (i = (sizeof(struct tcpa_event) - 1); 2450bfb2374SThiebaud Weksteen i < (sizeof(struct tcpa_event) + temp_event.event_size); i++) 2460bfb2374SThiebaud Weksteen seq_putc(m, temp_ptr[i]); 2470bfb2374SThiebaud Weksteen 2480bfb2374SThiebaud Weksteen return 0; 2490bfb2374SThiebaud Weksteen 2500bfb2374SThiebaud Weksteen } 2510bfb2374SThiebaud Weksteen 2529b01b535SThiebaud Weksteen static int tpm1_ascii_bios_measurements_show(struct seq_file *m, void *v) 2530bfb2374SThiebaud Weksteen { 2540bfb2374SThiebaud Weksteen int len = 0; 2550bfb2374SThiebaud Weksteen char *eventname; 2560bfb2374SThiebaud Weksteen struct tcpa_event *event = v; 2570bfb2374SThiebaud Weksteen unsigned char *event_entry = 2580bfb2374SThiebaud Weksteen (unsigned char *)(v + sizeof(struct tcpa_event)); 2590bfb2374SThiebaud Weksteen 2600bfb2374SThiebaud Weksteen eventname = kmalloc(MAX_TEXT_EVENT, GFP_KERNEL); 2610bfb2374SThiebaud Weksteen if (!eventname) { 2620bfb2374SThiebaud Weksteen printk(KERN_ERR "%s: ERROR - No Memory for event name\n ", 2630bfb2374SThiebaud Weksteen __func__); 2640bfb2374SThiebaud Weksteen return -EFAULT; 2650bfb2374SThiebaud Weksteen } 2660bfb2374SThiebaud Weksteen 2670bfb2374SThiebaud Weksteen /* 1st: PCR */ 2680bfb2374SThiebaud Weksteen seq_printf(m, "%2d ", do_endian_conversion(event->pcr_index)); 2690bfb2374SThiebaud Weksteen 2700bfb2374SThiebaud Weksteen /* 2nd: SHA1 */ 2710bfb2374SThiebaud Weksteen seq_printf(m, "%20phN", event->pcr_value); 2720bfb2374SThiebaud Weksteen 2730bfb2374SThiebaud Weksteen /* 3rd: event type identifier */ 2740bfb2374SThiebaud Weksteen seq_printf(m, " %02x", do_endian_conversion(event->event_type)); 2750bfb2374SThiebaud Weksteen 2760bfb2374SThiebaud Weksteen len += get_event_name(eventname, event, event_entry); 2770bfb2374SThiebaud Weksteen 2780bfb2374SThiebaud Weksteen /* 4th: eventname <= max + \'0' delimiter */ 2790bfb2374SThiebaud Weksteen seq_printf(m, " %s\n", eventname); 2800bfb2374SThiebaud Weksteen 2810bfb2374SThiebaud Weksteen kfree(eventname); 2820bfb2374SThiebaud Weksteen return 0; 2830bfb2374SThiebaud Weksteen } 2840bfb2374SThiebaud Weksteen 2859b01b535SThiebaud Weksteen const struct seq_operations tpm1_ascii_b_measurements_seqops = { 2869b01b535SThiebaud Weksteen .start = tpm1_bios_measurements_start, 2879b01b535SThiebaud Weksteen .next = tpm1_bios_measurements_next, 2889b01b535SThiebaud Weksteen .stop = tpm1_bios_measurements_stop, 2899b01b535SThiebaud Weksteen .show = tpm1_ascii_bios_measurements_show, 2900bfb2374SThiebaud Weksteen }; 2910bfb2374SThiebaud Weksteen 2929b01b535SThiebaud Weksteen const struct seq_operations tpm1_binary_b_measurements_seqops = { 2939b01b535SThiebaud Weksteen .start = tpm1_bios_measurements_start, 2949b01b535SThiebaud Weksteen .next = tpm1_bios_measurements_next, 2959b01b535SThiebaud Weksteen .stop = tpm1_bios_measurements_stop, 2969b01b535SThiebaud Weksteen .show = tpm1_binary_bios_measurements_show, 2970bfb2374SThiebaud Weksteen }; 298