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/*
* This file is part of libsamsung-ipc.
*
* Copyright (C) 2023 Denis 'GNUtoo' Carikli <GNUtoo@cyberdimension.org>
*
* libsamsung-ipc 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.
*
* libsamsung-ipc 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 libsamsung-ipc. If not, see <http://www.gnu.org/licenses/>.
*/
#include <errno.h>
#include <fcntl.h>
#include <libgen.h>
#include <stdint.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <sysexits.h>
#include <unistd.h>
void usage(char *progname)
{
printf("Usage:\n");
printf("\t%s FILE command <index> # %s\n",
basename(progname),
"Get bruteforce command.");
printf("\t%s FILE bruteforce <index> # %s\n",
basename(progname),
"Get bruteforce command.");
printf("\t%s list-supported # %s\n",
basename(progname),
"List supported devices/EFS.");
printf("\t%s --help # %s\n",
basename(progname),
"Print this help.");
}
int print_byte(int fd, off_t base, uint8_t offset)
{
off_t file_offset;
ssize_t rd;
char buf[1];
int rc;
bzero(&buf, sizeof(buf));
file_offset = lseek(fd, base + offset, SEEK_SET);
if (file_offset == -1) {
int err = errno;
printf("%s: lseek: %s\n", __func__, strerror(err));
return EX_OSERR;
}
do {
rd = read(fd, &buf, 1);
if (rd == -1) {
int err = errno;
printf("%s: read: %s\n", __func__, strerror(err));
return EX_OSERR;
}
} while (rd != 1);
rc = printf("%02x", buf[0] & 0xff);
if (rc < 0) {
int err = errno;
printf("%s: printf: %s\n", __func__, strerror(err));
return EX_OSERR;
}
return 0;
}
off_t field_offset(unsigned field_nr)
{
if (field_nr == 0)
return 0x18146e;
else if (field_nr == 1)
return 0x18148e;
else if (field_nr == 2)
return 0x1814ce;
else if (field_nr == 3)
return 0x1814fe;
else
return 0;
}
int cmd_list_supported(void)
{
printf("Supported devices:\n\t%s\n",
"Galaxy S II (GT-I9100)");
return 0;
}
int cmd_command(char* nv_data_path, int field_nr)
{
int fd;
int rc;
int i;
off_t base;
base = field_offset(field_nr);
if (base == 0) {
printf("%s: invalid field_offset: 0\n", __func__);
return EX_SOFTWARE;
}
fd = open(nv_data_path, O_RDONLY);
if (fd == -1) {
printf("%s: open: %s\n", __func__, strerror(errno));
return EX_NOINPUT;
}
printf("hashcat -m 110 --hex-salt -a 3 ");
for (i=0; i<20 ; i++) {
rc = print_byte(fd, base, i);
if (rc)
return rc;
}
rc = printf(":0000000000000000 ?d?d?d?d?d?d?d?d --show"
" | "
"cut -d : -f 3\n");
if (rc == -1) {
printf("%s: printf: %s\n", __func__, strerror(errno));
return EX_OSERR;
}
rc = close (fd);
if (fd == -1) {
printf("%s: close: %s\n", __func__, strerror(errno));
return EX_OSERR;
}
return 0;
}
int cmd_bruteforce()
{
return 0;
}
int main(int argc, char * const argv[])
{
if (argc == 4 && !strcmp(argv[2], "command")) {
char *endptr;
int field_nr = 0;
field_nr = strtol(argv[3], &endptr, 10);
if (errno != 0) {
usage(argv[0]);
return EX_USAGE;
}
if (!(argv[3][0] != '\0' && *endptr == '\0')) {
usage(argv[0]);
return EX_USAGE;
}
return cmd_command(argv[1], field_nr);
} else if (argc == 4 && !strcmp(argv[2], "bruteforce")) {
char *endptr;
int field_nr = 0;
field_nr = strtol(argv[3], &endptr, 10);
if (errno != 0) {
usage(argv[0]);
return EX_USAGE;
}
if (!(argv[3][0] != '\0' && *endptr == '\0')) {
usage(argv[0]);
return EX_USAGE;
}
return cmd_bruteforce(argv[1], field_nr);
} else if (argc == 2 && !strcmp(argv[1], "list-supported")) {
return cmd_list_supported();
} else if (argc == 2 && !strcmp(argv[1], "--help")) {
usage(argv[0]);
return 0;
} else {
usage(argv[0]);
return EX_USAGE;
}
}
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