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https://github.com/AetherDroid/android_kernel_samsung_on5xelte.git
synced 2025-09-09 01:28:05 -04:00
Fixed MTP to work with TWRP
This commit is contained in:
awab228
commit
f6dfaef42e
50820 changed files with 20846062 additions and 0 deletions
414
drivers/char/tpm/tpm_eventlog.c
Normal file
414
drivers/char/tpm/tpm_eventlog.c
Normal file
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@ -0,0 +1,414 @@
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/*
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* Copyright (C) 2005, 2012 IBM Corporation
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*
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* Authors:
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* Kent Yoder <key@linux.vnet.ibm.com>
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* Seiji Munetoh <munetoh@jp.ibm.com>
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* Stefan Berger <stefanb@us.ibm.com>
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* Reiner Sailer <sailer@watson.ibm.com>
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* Kylene Hall <kjhall@us.ibm.com>
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*
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* Maintained by: <tpmdd-devel@lists.sourceforge.net>
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*
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* Access to the eventlog created by a system's firmware / BIOS
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*
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* This program is free software; you can redistribute it and/or
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* modify it under the terms of the GNU General Public License
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* as published by the Free Software Foundation; either version
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* 2 of the License, or (at your option) any later version.
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*
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*/
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#include <linux/seq_file.h>
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#include <linux/fs.h>
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#include <linux/security.h>
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#include <linux/module.h>
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#include <linux/slab.h>
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#include "tpm.h"
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#include "tpm_eventlog.h"
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static const char* tcpa_event_type_strings[] = {
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"PREBOOT",
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"POST CODE",
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"",
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"NO ACTION",
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"SEPARATOR",
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"ACTION",
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"EVENT TAG",
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"S-CRTM Contents",
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"S-CRTM Version",
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"CPU Microcode",
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"Platform Config Flags",
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"Table of Devices",
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"Compact Hash",
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"IPL",
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"IPL Partition Data",
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"Non-Host Code",
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"Non-Host Config",
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"Non-Host Info"
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};
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static const char* tcpa_pc_event_id_strings[] = {
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"",
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"SMBIOS",
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"BIS Certificate",
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"POST BIOS ",
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"ESCD ",
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"CMOS",
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"NVRAM",
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"Option ROM",
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"Option ROM config",
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"",
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"Option ROM microcode ",
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"S-CRTM Version",
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"S-CRTM Contents ",
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"POST Contents ",
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"Table of Devices",
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};
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/* returns pointer to start of pos. entry of tcg log */
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static void *tpm_bios_measurements_start(struct seq_file *m, loff_t *pos)
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{
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loff_t i;
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struct tpm_bios_log *log = m->private;
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void *addr = log->bios_event_log;
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void *limit = log->bios_event_log_end;
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struct tcpa_event *event;
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/* read over *pos measurements */
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for (i = 0; i < *pos; i++) {
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event = addr;
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if ((addr + sizeof(struct tcpa_event)) < limit) {
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if (event->event_type == 0 && event->event_size == 0)
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return NULL;
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addr += sizeof(struct tcpa_event) + event->event_size;
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}
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}
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/* now check if current entry is valid */
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if ((addr + sizeof(struct tcpa_event)) >= limit)
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return NULL;
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event = addr;
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if ((event->event_type == 0 && event->event_size == 0) ||
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((addr + sizeof(struct tcpa_event) + event->event_size) >= limit))
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return NULL;
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return addr;
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}
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static void *tpm_bios_measurements_next(struct seq_file *m, void *v,
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loff_t *pos)
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{
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struct tcpa_event *event = v;
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struct tpm_bios_log *log = m->private;
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void *limit = log->bios_event_log_end;
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v += sizeof(struct tcpa_event) + event->event_size;
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/* now check if current entry is valid */
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if ((v + sizeof(struct tcpa_event)) >= limit)
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return NULL;
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event = v;
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if (event->event_type == 0 && event->event_size == 0)
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return NULL;
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if ((event->event_type == 0 && event->event_size == 0) ||
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((v + sizeof(struct tcpa_event) + event->event_size) >= limit))
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return NULL;
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(*pos)++;
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return v;
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}
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static void tpm_bios_measurements_stop(struct seq_file *m, void *v)
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{
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}
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static int get_event_name(char *dest, struct tcpa_event *event,
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unsigned char * event_entry)
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{
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const char *name = "";
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/* 41 so there is room for 40 data and 1 nul */
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char data[41] = "";
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int i, n_len = 0, d_len = 0;
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struct tcpa_pc_event *pc_event;
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switch(event->event_type) {
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case PREBOOT:
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case POST_CODE:
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case UNUSED:
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case NO_ACTION:
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case SCRTM_CONTENTS:
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case SCRTM_VERSION:
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case CPU_MICROCODE:
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case PLATFORM_CONFIG_FLAGS:
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case TABLE_OF_DEVICES:
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case COMPACT_HASH:
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case IPL:
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case IPL_PARTITION_DATA:
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case NONHOST_CODE:
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case NONHOST_CONFIG:
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case NONHOST_INFO:
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name = tcpa_event_type_strings[event->event_type];
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n_len = strlen(name);
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break;
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case SEPARATOR:
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case ACTION:
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if (MAX_TEXT_EVENT > event->event_size) {
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name = event_entry;
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n_len = event->event_size;
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}
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break;
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case EVENT_TAG:
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pc_event = (struct tcpa_pc_event *)event_entry;
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/* ToDo Row data -> Base64 */
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switch (pc_event->event_id) {
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case SMBIOS:
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case BIS_CERT:
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case CMOS:
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case NVRAM:
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case OPTION_ROM_EXEC:
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case OPTION_ROM_CONFIG:
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case S_CRTM_VERSION:
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name = tcpa_pc_event_id_strings[pc_event->event_id];
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n_len = strlen(name);
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break;
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/* hash data */
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case POST_BIOS_ROM:
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case ESCD:
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case OPTION_ROM_MICROCODE:
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case S_CRTM_CONTENTS:
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case POST_CONTENTS:
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name = tcpa_pc_event_id_strings[pc_event->event_id];
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n_len = strlen(name);
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for (i = 0; i < 20; i++)
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d_len += sprintf(&data[2*i], "%02x",
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pc_event->event_data[i]);
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break;
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default:
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break;
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}
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default:
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break;
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}
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return snprintf(dest, MAX_TEXT_EVENT, "[%.*s%.*s]",
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n_len, name, d_len, data);
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}
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static int tpm_binary_bios_measurements_show(struct seq_file *m, void *v)
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{
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struct tcpa_event *event = v;
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char *data = v;
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int i;
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for (i = 0; i < sizeof(struct tcpa_event) + event->event_size; i++)
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seq_putc(m, data[i]);
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return 0;
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}
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static int tpm_bios_measurements_release(struct inode *inode,
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struct file *file)
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{
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struct seq_file *seq = file->private_data;
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struct tpm_bios_log *log = seq->private;
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if (log) {
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kfree(log->bios_event_log);
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kfree(log);
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}
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return seq_release(inode, file);
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}
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static int tpm_ascii_bios_measurements_show(struct seq_file *m, void *v)
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{
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int len = 0;
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char *eventname;
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struct tcpa_event *event = v;
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unsigned char *event_entry =
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(unsigned char *) (v + sizeof(struct tcpa_event));
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eventname = kmalloc(MAX_TEXT_EVENT, GFP_KERNEL);
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if (!eventname) {
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printk(KERN_ERR "%s: ERROR - No Memory for event name\n ",
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__func__);
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return -EFAULT;
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}
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seq_printf(m, "%2d ", event->pcr_index);
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/* 2nd: SHA1 */
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seq_printf(m, "%20phN", event->pcr_value);
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/* 3rd: event type identifier */
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seq_printf(m, " %02x", event->event_type);
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len += get_event_name(eventname, event, event_entry);
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/* 4th: eventname <= max + \'0' delimiter */
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seq_printf(m, " %s\n", eventname);
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kfree(eventname);
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return 0;
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}
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static const struct seq_operations tpm_ascii_b_measurments_seqops = {
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.start = tpm_bios_measurements_start,
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.next = tpm_bios_measurements_next,
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.stop = tpm_bios_measurements_stop,
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.show = tpm_ascii_bios_measurements_show,
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};
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static const struct seq_operations tpm_binary_b_measurments_seqops = {
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.start = tpm_bios_measurements_start,
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.next = tpm_bios_measurements_next,
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.stop = tpm_bios_measurements_stop,
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.show = tpm_binary_bios_measurements_show,
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};
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static int tpm_ascii_bios_measurements_open(struct inode *inode,
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struct file *file)
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{
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int err;
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struct tpm_bios_log *log;
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struct seq_file *seq;
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log = kzalloc(sizeof(struct tpm_bios_log), GFP_KERNEL);
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if (!log)
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return -ENOMEM;
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if ((err = read_log(log)))
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goto out_free;
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/* now register seq file */
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err = seq_open(file, &tpm_ascii_b_measurments_seqops);
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if (!err) {
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seq = file->private_data;
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seq->private = log;
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} else {
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goto out_free;
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}
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out:
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return err;
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out_free:
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kfree(log->bios_event_log);
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kfree(log);
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goto out;
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}
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static const struct file_operations tpm_ascii_bios_measurements_ops = {
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.open = tpm_ascii_bios_measurements_open,
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.read = seq_read,
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.llseek = seq_lseek,
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.release = tpm_bios_measurements_release,
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};
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static int tpm_binary_bios_measurements_open(struct inode *inode,
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struct file *file)
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{
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int err;
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struct tpm_bios_log *log;
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struct seq_file *seq;
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log = kzalloc(sizeof(struct tpm_bios_log), GFP_KERNEL);
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if (!log)
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return -ENOMEM;
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if ((err = read_log(log)))
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goto out_free;
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/* now register seq file */
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err = seq_open(file, &tpm_binary_b_measurments_seqops);
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if (!err) {
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seq = file->private_data;
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seq->private = log;
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} else {
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goto out_free;
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}
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out:
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return err;
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out_free:
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kfree(log->bios_event_log);
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kfree(log);
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goto out;
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}
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static const struct file_operations tpm_binary_bios_measurements_ops = {
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.open = tpm_binary_bios_measurements_open,
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.read = seq_read,
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.llseek = seq_lseek,
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.release = tpm_bios_measurements_release,
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};
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static int is_bad(void *p)
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{
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if (!p)
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return 1;
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if (IS_ERR(p) && (PTR_ERR(p) != -ENODEV))
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return 1;
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return 0;
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}
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struct dentry **tpm_bios_log_setup(char *name)
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{
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struct dentry **ret = NULL, *tpm_dir, *bin_file, *ascii_file;
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tpm_dir = securityfs_create_dir(name, NULL);
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if (is_bad(tpm_dir))
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goto out;
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bin_file =
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securityfs_create_file("binary_bios_measurements",
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S_IRUSR | S_IRGRP, tpm_dir, NULL,
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&tpm_binary_bios_measurements_ops);
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if (is_bad(bin_file))
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goto out_tpm;
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ascii_file =
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securityfs_create_file("ascii_bios_measurements",
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S_IRUSR | S_IRGRP, tpm_dir, NULL,
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&tpm_ascii_bios_measurements_ops);
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if (is_bad(ascii_file))
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goto out_bin;
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ret = kmalloc(3 * sizeof(struct dentry *), GFP_KERNEL);
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if (!ret)
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goto out_ascii;
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ret[0] = ascii_file;
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ret[1] = bin_file;
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ret[2] = tpm_dir;
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return ret;
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out_ascii:
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securityfs_remove(ascii_file);
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out_bin:
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securityfs_remove(bin_file);
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out_tpm:
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securityfs_remove(tpm_dir);
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out:
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return NULL;
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}
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void tpm_bios_log_teardown(struct dentry **lst)
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{
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int i;
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for (i = 0; i < 3; i++)
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securityfs_remove(lst[i]);
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}
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