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clr-init: initial commit V0.1

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Signed-off-by: Josue David Hernandez <josue.d.hernandez.gutierrez@intel.com>
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Josue David Hernandez
2018-01-19 17:48:16 -06:00
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the library. If this is what you want to do, use the GNU Lesser General
Public License instead of this License. But first, please read
<http://www.gnu.org/philosophy/why-not-lgpl.html>.

28
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## clr-init
small init wrote with C programming language that takes information from the cmdline in proc to mount root and execute
/sbin/init from the root partition.
## Luks Encryption support
for partitions encrypted with luks a password input will be displayed in boot time to decrypt root partition, add options
to cmdline is not needed to know that root partition is encrypted.
## How it works
Taken two paramters from cmdline root and rootfstype root partition is mounted and its systemd(/sbin/init) is running
nothing different than other initrd.
Initrd just work when root option use the device name directly or PARTUUID for encryption initrd read the first part of
the root partition looking for a luks header.
## Compilation and Install
This will will install clr-init.img.gz in /usr/local/lib/initrd
```
meson builddir && ninja -C builddir install
```
install path could be changed using as sample:
```
meson --prefix /usr builddir
```
in this case the installation path will be /usr/lib/initrd

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.TH clr\-init
.SH FILES
.PP
\fB\fC/usr/local/lib/initrd/clr\-init.img.gz\fR
.SH DESCRIPTION
.PP
small initrd wrote with C programming language that takes information from the cmdline in proc to mount root and execute
/sbin/init from the root partition.
.SH Luks Encryption support
.PP
for partitions encrypted with luks a password input will be displayed in boot time to decrypt root partition, add options
to cmdline is not needed to know that root partition is encrypted.

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#!/usr/bin/bash
INITRD_FILE=$1
mkdir -p ${MESON_BUILD_ROOT}/initramfs/{proc,dev,sys,root,usr/lib64,lib64}
cp ${MESON_BUILD_ROOT}/init ${MESON_BUILD_ROOT}/initramfs/
cp -u /usr/lib64/{libc.so.?,libm.so.?,libgcc_s.so.?,libuuid.so.?,libdevmapper.so.?.??,libgcrypt.so.??,libgpg-error.so.?,libudev.so.?,libpthread.so.?} ${MESON_BUILD_ROOT}/initramfs/usr/lib64/
cp -u /usr/lib/libcryptsetup.so.? ${MESON_BUILD_ROOT}/initramfs/usr/lib64/
cp -u /lib64/ld-linux-x86-64.so.? ${MESON_BUILD_ROOT}/initramfs/lib64/
cd ${MESON_BUILD_ROOT}/initramfs
find . -print0 | cpio --null -ov --format=newc | gzip -9 > ${MESON_BUILD_ROOT}/${INITRD_FILE}
mkdir -p ${MESON_INSTALL_PREFIX}/lib/kernel/
cp ${MESON_BUILD_ROOT}/${INITRD_FILE} ${MESON_INSTALL_PREFIX}/lib/kernel/${INITRD_FILE}
cd ${MESON_SOURCE_ROOT}

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project('clr-init', 'c',
version : '0.1',
license : 'GPL-3.0',
meson_version : '>= 0.44'
)
src = [
'src/crypting.c',
'src/device_handler.c',
'src/initrd.c',
'src/error.c',
'src/main.c'
]
initrd_img = 'clr-init.img.gz'
cryptsetup = dependency('libcryptsetup')
executable('init', src, dependencies : cryptsetup)
install_man('clr-init.1')
meson.add_install_script('install_initrd.sh', initrd_img)

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/***
Copyright © 2018 Intel Corporation
Author: Josue David Hernandez Gutierrez <josue.d.hernandez.gutierrez@intel.com>
This file is part of clr-initrd
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 3 of the License,
or (at your option) any later version.
This program is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
General Public License for more details.
You should have received a copy of the GNU General Public License
along with this program. If not, see <https://www.gnu.org/licenses/>.
***/
#include <stdio.h>
#include <string.h>
#include <libcryptsetup.h>
#include "error.h"
#include "crypting.h"
int decrypt_device(const char *device_path, const char *mapped_name, const char *pass, int pass_size)
{
struct crypt_device *dev = NULL;
int ret = 1;
if (crypt_init(&dev, device_path) < 0) {
panic(NULL);
}
if (crypt_load(dev, CRYPT_LUKS1, NULL) < 0) {
crypt_free(dev);
panic(NULL);
}
// checking for passphrase
if (crypt_activate_by_passphrase(
dev, NULL, CRYPT_ANY_SLOT,
pass, pass_size, 0)) {
crypt_free(dev);
return CRYPT_WRONG_PASS;
}
if (crypt_activate_by_passphrase(
dev, mapped_name, CRYPT_ANY_SLOT,
pass, pass_size, 0)) {
crypt_free(dev);
panic(NULL);
}
crypt_free(dev);
return ret;
}
int is_LUKS(const char *device_path)
{
FILE *fp = NULL;
LUKS_header_t header;
int ret = CRYPT_ISLUKS_FALSE;
int amount_elem = 1;
fp = fopen(device_path, "r");
if (fp == NULL) {
panic(NULL);
}
if (fread((void*)&header, sizeof(header), amount_elem, fp) < amount_elem) {
fclose(fp);
panic("ERROR READING FROM %s OR EOF\n", device_path);
}
if (strncmp((const char*)&header.magic,
CRYPT_HEADER_MAGIC, CRYPT_HEADER_MAGIC_SIZE) == 0) {
fclose(fp);
return CRYPT_ISLUKS_TRUE;
}
fclose(fp);
return ret;
}

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/***
Copyright © 2018 Intel Corporation
Author: Josue David Hernandez Gutierrez <josue.d.hernandez.gutierrez@intel.com>
This file is part of clr-initrd
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 3 of the License,
or (at your option) any later version.
This program is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
General Public License for more details.
You should have received a copy of the GNU General Public License
along with this program. If not, see <https://www.gnu.org/licenses/>.
***/
#ifndef __CRYPTING_H
#define __CRYPTING_H
#include <stdint.h>
#define CRYPT_PASSWORD_TRIES 3
#define CRYPT_WRONG_PASS 0
#define CRYPT_ISLUKS_TRUE 1
#define CRYPT_ISLUKS_FALSE 0
#define CRYPT_HEADER_MAGIC "LUKS\xBA\xBE"
#define CRYPT_HEADER_MAGIC_SIZE 6
#define CRYPT_HEADER_DIGESTSIZE 20
#define CRYPT_HEADER_SALTSIZE 32
#define CRYPT_HEADER_CIPHER_NAME_SIZE 32
#define CRYPT_HEADER_CIPHER_MODE_SIZE 32
#define CRYPT_HEADER_HASH_SPEC_SIZE 32
#define CRYPT_HEADER_UUID_SIZE 40
#define CRYPT_HEADER_AMOUNT_KEYSLOTS 8
struct LUKS_keyslot {
uint32_t active;
uint32_t iterations;
uint8_t salt[CRYPT_HEADER_SALTSIZE];
uint32_t key_material_offset;
uint32_t stripes;
} __attribute__((packed));
typedef struct LUKS_keyslot LUKS_keyslot_t;
struct LUKS_header {
uint8_t magic[CRYPT_HEADER_MAGIC_SIZE];
uint16_t version;
char cipher_name[CRYPT_HEADER_CIPHER_NAME_SIZE];
char cipher_mode[CRYPT_HEADER_CIPHER_MODE_SIZE];
char hash_spec[CRYPT_HEADER_HASH_SPEC_SIZE];
uint32_t payload_offset;
uint32_t key_bytes;
uint8_t mk_digest[CRYPT_HEADER_DIGESTSIZE];
uint8_t mk_digest_salt[CRYPT_HEADER_SALTSIZE];
uint32_t mk_digest_iter;
char uuid[CRYPT_HEADER_UUID_SIZE];
LUKS_keyslot_t keyslots[CRYPT_HEADER_AMOUNT_KEYSLOTS];
} __attribute__((packed));
typedef struct LUKS_header LUKS_header_t;
/**
* Return 1 if device has luks encryption and 0 if not
*/
int is_LUKS(const char *device_path);
/**
* decrypt partition and create decrypted device with mapped_name in /dev/mapper/
* returns 1 if password is ok and all is well, 0 if password is wrong
*/
int decrypt_device(const char *device_path, const char *mapped_name, const char *pass, int pass_size);
#endif

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/***
Copyright © 2018 Intel Corporation
Author: Josue David Hernandez Gutierrez <josue.d.hernandez.gutierrez@intel.com>
This file is part of clr-initrd
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 3 of the License,
or (at your option) any later version.
This program is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
General Public License for more details.
You should have received a copy of the GNU General Public License
along with this program. If not, see <https://www.gnu.org/licenses/>.
***/
#include <stdlib.h>
#include <stdio.h>
#include <string.h>
#include <dirent.h>
#include "error.h"
#include "device_handler.h"
static void UUID_parser(const char *c_uuid, uuid_t *uuid)
{
if (strlen(c_uuid) != UUID_STR_LEN) {
panic("INCORRECT PARTUUID FORMAT FOR %s\n", c_uuid);
}
memset((void*)uuid, 0, sizeof(uuid_t));
uint32_t tmp = strtol(&c_uuid[POS_UUID_STR_SECTION_1], NULL, BASE_16);
uuid->high_uuid = tmp;
uint16_t tmp2 = strtol(&c_uuid[POS_UUID_STR_SECTION_2], NULL, BASE_16);
uuid->middle_uuid1 = tmp2;
uint16_t tmp3 = strtol(&c_uuid[POS_UUID_STR_SECTION_3], NULL, BASE_16);
uuid->middle_uuid2 = tmp3;
uint16_t tmp4 = strtol(&c_uuid[POS_UUID_STR_SECTION_4], NULL, BASE_16);
uint64_t tmp5 = strtol(&c_uuid[POS_UUID_STR_SECTION_5], NULL, BASE_16);
uuid->low_uuid = htobe16(tmp4) | htobe64(tmp5);
}
static int get_GPTheader(GPT_header_t *header, char *device_path)
{
FILE *fp = NULL;
int ret = 0;
int header_amount = 1;
fp = fopen(device_path, "r");
if (fp == NULL) {
panic(NULL);
}
if (fseek(fp, GPT_POSITION, SEEK_SET) < 0) {
fclose(fp);
panic(NULL);
}
if ((ret = fread((void*)header, sizeof(GPT_header_t), header_amount, fp)) != header_amount) {
fclose(fp);
panic("ERROR READING FROM %s OR EOF\n", device_path);
}
fclose(fp);
return ret;
}
static size_t get_devGUIDs(int size, GUID_entry_t *guid, char *device_path)
{
FILE *fp = NULL;
int i = 0;
fp = fopen(device_path, "r");
if (fp == NULL) {
panic(NULL);
}
if (fseek(fp, GUID_ENTRY_POSITION, SEEK_SET) < 0) {
fclose(fp);
panic(NULL);
}
if (fread((void*)guid, sizeof(GUID_entry_t), size, fp) != size) {
fclose(fp);
panic("ERROR READING FROM %s OR EOF\n", device_path);
}
for (i = 0; i < size; i++) {
if (guid[i].partition_type.high_uuid == 0)
break;
}
fclose(fp);
return (size_t)i;
}
void find_partUUID(const char *c_partuuid, char *dev_path)
{
DIR *p_dir = NULL;
struct dirent *p_dir_entry = NULL;
uuid_t partuuid;
UUID_parser(c_partuuid, &partuuid);
memset(dev_path, 0, DEV_PATH_LEN);
p_dir = opendir("/dev");
if (p_dir == NULL) {
panic(NULL);
}
while ((p_dir_entry = readdir(p_dir)) != NULL) {
if (p_dir_entry->d_type == DT_BLK) {
char full_name[DEV_PATH_LEN];
snprintf(full_name, DEV_PATH_LEN, "%s/%s", "/dev", p_dir_entry->d_name);
GPT_header_t tmp_header;
memset(&tmp_header, 0, sizeof(GPT_header_t));
get_GPTheader(&tmp_header, full_name);
if (strncmp((const char*)&tmp_header.signature, GPT_SIG_ID, GPT_SIG_ID_LEN) == 0) {
GUID_entry_t *entries = NULL;
int partitions;
int i;
entries = malloc(
sizeof(GUID_entry_t) * tmp_header.number_partition_entries);
memset(entries, 0, sizeof(GUID_entry_t) * tmp_header.number_partition_entries);
partitions = get_devGUIDs(
tmp_header.number_partition_entries, entries,
full_name);
for (i = 0; i < partitions; i++) {
if (memcmp(&entries[i].partuuid, &partuuid, sizeof(uuid_t)) == 0) {
snprintf(dev_path, DEV_PATH_LEN, "%s%d", full_name, i+1);
break;
}
}
free(entries);
if (strlen(dev_path) > 0)
break;
}
}
}
closedir(p_dir);
}
//int find_UUID(char* dev_path)
//{
//
// return 0;
//}

96
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/***
Copyright © 2018 Intel Corporation
Author: Josue David Hernandez Gutierrez <josue.d.hernandez.gutierrez@intel.com>
This file is part of clr-initrd
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 3 of the License,
or (at your option) any later version.
This program is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
General Public License for more details.
You should have received a copy of the GNU General Public License
along with this program. If not, see <https://www.gnu.org/licenses/>.
***/
#ifndef __DEVICE_HANDLER_H
#define __DEVICE_HANDLER_H
#include <stdint.h>
#define DEV_PATH_LEN 512
//
// UUID string section numbers
//
// 1 2 3 4 5
// XXXXXXXX-XXXX-XXXX-XXXX-XXXXXXXXXXXX
//
#define POS_UUID_STR_SECTION_1 0
#define POS_UUID_STR_SECTION_2 9
#define POS_UUID_STR_SECTION_3 14
#define POS_UUID_STR_SECTION_4 19
#define POS_UUID_STR_SECTION_5 24
#define UUID_STR_LEN 36
#define BASE_16 16
// GPT
#define GPT_POSITION 512
#define GUID_ENTRY_POSITION 1024
#define GPT_SIG_ID "EFI PART"
#define GPT_SIG_ID_LEN 8
#define GPT_PARTITION_NAME_SIZE 72
struct uuid {
uint32_t high_uuid;
uint16_t middle_uuid1;
uint16_t middle_uuid2;
uint64_t low_uuid;
} __attribute__((packed));
typedef struct uuid uuid_t;
struct GPT_header {
uint64_t signature;
uint32_t revision;
uint32_t header_size;
uint32_t CRC32_zlib_header;
uint32_t reserved; // must be zero
uint64_t current_LBA;
uint64_t backup_LBA;
uint64_t first_usable_LBA;
uint64_t lastu_usable_LBA;
uuid_t disk_uuid;
uint64_t starting_LBA_partition_entries;
uint32_t number_partition_entries;
uint32_t size_single_parition_entry;
uint32_t CRC32_zlib_partition_array_little_entian;
} __attribute__((packed));
typedef struct GPT_header GPT_header_t;
struct GUID_entry {
uuid_t partition_type;
uuid_t partuuid;
uint64_t firs_LBA; //little endian
uint64_t last_LBA;
uint64_t flags;
char partition_name[GPT_PARTITION_NAME_SIZE];
} __attribute__((packed));
typedef struct GUID_entry GUID_entry_t;
/**
* set dev_path pointed string with dev path associated with PARTUUID
*/
void find_partUUID(const char *c_partuuid, char *dev_path);
#endif

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/***
Copyright © 2018 Intel Corporation
Author: Josue David Hernandez Gutierrez <josue.d.hernandez.gutierrez@intel.com>
This file is part of clr-initrd
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 3 of the License,
or (at your option) any later version.
This program is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
General Public License for more details.
You should have received a copy of the GNU General Public License
along with this program. If not, see <https://www.gnu.org/licenses/>.
***/
#include <errno.h>
#include <stdarg.h>
#include <stdio.h>
#include <string.h>
#include <sys/reboot.h>
#include "error.h"
void panic(const char *format, ...)
{
va_list args;
if (format != NULL) {
va_start(args, format);
vfprintf(stderr, format, args);
va_end(args);
} else {
fprintf(stderr, "%d:%s\n", errno, strerror(errno));
}
puts("press enter to reboot");
getchar();
reboot(LINUX_REBOOT_CMD_RESTART);
}

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/***
Copyright © 2018 Intel Corporation
Author: Josue David Hernandez Gutierrez <josue.d.hernandez.gutierrez@intel.com>
This file is part of clr-initrd
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 3 of the License,
or (at your option) any later version.
This program is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
General Public License for more details.
You should have received a copy of the GNU General Public License
along with this program. If not, see <https://www.gnu.org/licenses/>.
***/
#ifndef __ERROR_H
#define __ERROR_H
// taken from /usr/include/linux/reboot.h
#define LINUX_REBOOT_CMD_RESTART 0x1234567
/**
* Show formated string in stderr and start reboot process
* if format pointer is different than NULL also show strerror
* from errno.
*/
void panic(const char *format, ...);
#endif

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/***
Copyright © 2018 Intel Corporation
Author: Josue David Hernandez Gutierrez <josue.d.hernandez.gutierrez@intel.com>
This file is part of clr-initrd
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 3 of the License,
or (at your option) any later version.
This program is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
General Public License for more details.
You should have received a copy of the GNU General Public License
along with this program. If not, see <https://www.gnu.org/licenses/>.
***/
#include <unistd.h>
#include <stdlib.h>
#include <string.h>
#include <stdio.h>
#include <sys/mount.h>
#include "error.h"
#include "device_handler.h"
#include "initrd.h"
struct virtual_fs {
const char *target;
const char *filesystem;
unsigned long mountflags;
const void *data;
};
typedef struct virtual_fs virtual_fs_t;
static virtual_fs_t vfs[] = {
{ "/proc", "proc", MS_NODEV | MS_NOEXEC | MS_NOSUID, NULL},
{ "/dev", "devtmpfs", 0, "size=10240k,mode=0755"}
};
static int get_cmdline_param(const char *cmdline, const char *param, char *value)
{
char *value_end = NULL;
int value_len = 0;
char *param_start = strstr(cmdline, param);
if (param_start == NULL) {
return 0;
}
param_start += strlen(param) + 1;
value_end = strpbrk(param_start, " \t");
if (value_end == NULL) {
value_end = param_start + strlen(param_start);
}
value_len = value_end - param_start;
memset(value, 0, value_len + 1);
memcpy((void*)value, (void*)param_start, value_len);
return value_len + 1;
}
static size_t get_root_type(char *cmdline, char *devname)
{
int ret = 0;
char root_param[MAX_CMDLINE_LEN];
if ((ret = get_cmdline_param(cmdline, "root", root_param)) == 0) {
panic("ERROR GETTING ROOT FROM CMDLINE\n");
}
if (get_cmdline_param(root_param, "PARTUUID", devname) != 0) {
return ROOT_PARTUUID;
}
if (get_cmdline_param(root_param, "UUID", devname) != 0) {
return ROOT_UUID;
}
memcpy(devname, root_param, ret);
return ROOT_DEVNAME;
}
void get_root_dev(char *root_dev, char *fs_type)
{
FILE *fp_cmdline = NULL;
char cmdline[MAX_CMDLINE_LEN];
char root_value[MAX_CMDLINE_LEN];
int ret = 0;
fp_cmdline = fopen(CMD_LINE_PATH, "r");
if (fp_cmdline == NULL) {
panic(NULL);
}
ret = fread((void*) cmdline, sizeof(char) * MAX_CMDLINE_LEN, 1, fp_cmdline);
if(!feof(fp_cmdline) && ret != 1){
fclose(fp_cmdline);
panic("ERROR READING FROM %s OR EOF\n", CMD_LINE_PATH);
}
if (get_cmdline_param(cmdline, "rootfstype", fs_type) == 0) {
fclose(fp_cmdline);
panic("ERROR GETTING ROOTFS_TYPE FROM CMDLINE\n");
}
switch (get_root_type(cmdline, root_value)) {
case ROOT_UUID:
fclose(fp_cmdline);
panic("ROOT=UUID IS NOT IMPLEMENTED YET\n");
break;
case ROOT_PARTUUID:
find_partUUID(root_value, root_dev);
break;
case ROOT_DEVNAME:
memcpy(root_dev, root_value, MAX_CMDLINE_LEN);
break;
default:
panic("ERROR GETTING ROOT FROM CMDLINE\n");
break;
}
fclose(fp_cmdline);
}
void clean_initrd()
{
rmdir("/dev");
rmdir("/proc");
unlink("/init");
}
void mount_virtual_fs()
{
int i = 0;
for (i = 0; i < sizeof(vfs)/sizeof(virtual_fs_t); i++) {
if (mount(NULL, vfs[i].target, vfs[i].filesystem, vfs[i].mountflags, vfs[i].data)) {
panic("ERROR MOUNTING %s\n", vfs[i].filesystem);
}
}
}
void mount_root(const char *root_partition, char *fs_types)
{
char *fs_type = NULL;
fs_type = strtok(fs_types, ",");
while (fs_type != NULL) {
if (mount(root_partition, "/root", fs_type, MS_NOATIME|MS_NODIRATIME, NULL) == 0) {
break;
}
fs_type = strtok(NULL, ",");
}
if (fs_type == NULL) {
panic("ERROR MOUNTING %s\n", "/root");
}
}

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/***
Copyright © 2018 Intel Corporation
Author: Josue David Hernandez Gutierrez <josue.d.hernandez.gutierrez@intel.com>
This file is part of clr-initrd
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 3 of the License,
or (at your option) any later version.
This program is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
General Public License for more details.
You should have received a copy of the GNU General Public License
along with this program. If not, see <https://www.gnu.org/licenses/>.
***/
#ifndef __INITRD_H
#define __INITRD_H
#define MAX_CMDLINE_LEN 1024
#define MAX_DEV_PATH 512
#define CMD_LINE_PATH "/proc/cmdline"
// ROOT types
#define ROOT_UUID 1
#define ROOT_PARTUUID 2
#define ROOT_DEVNAME 3
#define ROOT_MAPPED_NAME "clr-root"
#define ROOT_MAPPED_PATH "/dev/mapper/"ROOT_MAPPED_NAME
/**
* gets root device information from cmdline options
*/
void get_root_dev(char *root_dev, char *fs_type);
/**
* Clean Initrd environment
*/
void clean_initrd();
/**
* Mount virtual filesytems predefined
*/
void mount_virtual_fs();
/**
* Mount root filesystem trying with every fs_types
*/
void mount_root(const char *root_partition, char *fs_types);
#endif

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/***
Copyright © 2018 Intel Corporation
Author: Josue David Hernandez Gutierrez <josue.d.hernandez.gutierrez@intel.com>
This file is part of clr-initrd
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 3 of the License,
or (at your option) any later version.
This program is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
General Public License for more details.
You should have received a copy of the GNU General Public License
along with this program. If not, see <https://www.gnu.org/licenses/>.
***/
#include <unistd.h>
#include <sys/mount.h>
#include <stdlib.h>
#include <string.h>
#include "initrd.h"
#include "crypting.h"
#include "error.h"
int main(int argc __attribute__((unused)), char *argv[])
{
char root_partition[MAX_DEV_PATH];
char fs_types[MAX_DEV_PATH];
int err = 0;
int i = 0;
mount_virtual_fs();
get_root_dev(root_partition, fs_types);
if (is_LUKS(root_partition) == CRYPT_ISLUKS_TRUE) {
for (i = 0; i < CRYPT_PASSWORD_TRIES; i++) {
char *password = NULL;
password = getpass("type passphrase for root device:");
err = decrypt_device(root_partition,
ROOT_MAPPED_NAME, password, (int)strlen(password));
free(password);
if (err != CRYPT_WRONG_PASS) {
memset((void*)root_partition, 0, MAX_DEV_PATH);
memcpy((void*)root_partition, ROOT_MAPPED_PATH, strlen(ROOT_MAPPED_PATH));
break;
}
}
if (err == CRYPT_WRONG_PASS) {
panic("YOU TRIED MORE THAN %d TIMES\n", CRYPT_PASSWORD_TRIES);
}
}
mount_root(root_partition, fs_types);
clean_initrd();
if (chdir("/root") < 0) {
panic("ERROR CHANGING DIR TO %s\n", "/root");
}
mount(".", "/", NULL, MS_MOVE, NULL);
if (chroot(".")) {
panic("ERROR CHANGING ROOT TO %s\n", "/root");
}
if (chdir("/")) {
panic("ERROR CHANGING DIR TO %s\n", "/");
}
execv("/sbin/init", argv);
}