mirror of
https://github.com/Atmosphere-NX/Atmosphere.git
synced 2024-11-06 12:11:43 +00:00
107 lines
3.6 KiB
C
107 lines
3.6 KiB
C
/*
|
|
* Copyright (c) 2018 Atmosphère-NX
|
|
*
|
|
* This program is free software; you can redistribute it and/or modify it
|
|
* under the terms and conditions of the GNU General Public License,
|
|
* version 2, as published by the Free Software Foundation.
|
|
*
|
|
* This program is distributed in the hope 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 <http://www.gnu.org/licenses/>.
|
|
*/
|
|
|
|
#include <stdbool.h>
|
|
#include <stdint.h>
|
|
#include <string.h>
|
|
|
|
#include "utils.h"
|
|
#include "masterkey.h"
|
|
#include "se.h"
|
|
|
|
static unsigned int g_mkey_revision = 0;
|
|
static bool g_determined_mkey_revision = false;
|
|
|
|
static uint8_t g_old_masterkeys[MASTERKEY_REVISION_MAX][0x10];
|
|
|
|
/* TODO: Extend with new vectors, as needed. */
|
|
static const uint8_t mkey_vectors[MASTERKEY_REVISION_MAX][0x10] =
|
|
{
|
|
{0x0C, 0xF0, 0x59, 0xAC, 0x85, 0xF6, 0x26, 0x65, 0xE1, 0xE9, 0x19, 0x55, 0xE6, 0xF2, 0x67, 0x3D}, /* Zeroes encrypted with Master Key 00. */
|
|
{0x29, 0x4C, 0x04, 0xC8, 0xEB, 0x10, 0xED, 0x9D, 0x51, 0x64, 0x97, 0xFB, 0xF3, 0x4D, 0x50, 0xDD}, /* Master key 00 encrypted with Master key 01. */
|
|
{0xDE, 0xCF, 0xEB, 0xEB, 0x10, 0xAE, 0x74, 0xD8, 0xAD, 0x7C, 0xF4, 0x9E, 0x62, 0xE0, 0xE8, 0x72}, /* Master key 01 encrypted with Master key 02. */
|
|
{0x0A, 0x0D, 0xDF, 0x34, 0x22, 0x06, 0x6C, 0xA4, 0xE6, 0xB1, 0xEC, 0x71, 0x85, 0xCA, 0x4E, 0x07}, /* Master key 02 encrypted with Master key 03. */
|
|
{0x6E, 0x7D, 0x2D, 0xC3, 0x0F, 0x59, 0xC8, 0xFA, 0x87, 0xA8, 0x2E, 0xD5, 0x89, 0x5E, 0xF3, 0xE9}, /* Master key 03 encrypted with Master key 04. */
|
|
};
|
|
|
|
bool check_mkey_revision(unsigned int revision) {
|
|
uint8_t final_vector[0x10];
|
|
|
|
unsigned int check_keyslot = KEYSLOT_SWITCH_MASTERKEY;
|
|
if (revision > 0) {
|
|
/* Generate old master key array. */
|
|
for (unsigned int i = revision; i > 0; i--) {
|
|
se_aes_ecb_decrypt_block(check_keyslot, g_old_masterkeys[i-1], 0x10, mkey_vectors[i], 0x10);
|
|
set_aes_keyslot(KEYSLOT_SWITCH_TEMPKEY, g_old_masterkeys[i-1], 0x10);
|
|
check_keyslot = KEYSLOT_SWITCH_TEMPKEY;
|
|
}
|
|
}
|
|
|
|
se_aes_ecb_decrypt_block(check_keyslot, final_vector, 0x10, mkey_vectors[0], 0x10);
|
|
for (unsigned int i = 0; i < 0x10; i++) {
|
|
if (final_vector[i] != 0) {
|
|
return false;
|
|
}
|
|
}
|
|
return true;
|
|
}
|
|
|
|
int mkey_detect_revision(void) {
|
|
if (g_determined_mkey_revision) {
|
|
generic_panic();
|
|
}
|
|
|
|
for (unsigned int rev = 0; rev < MASTERKEY_REVISION_MAX; rev++) {
|
|
if (check_mkey_revision(rev)) {
|
|
g_determined_mkey_revision = true;
|
|
g_mkey_revision = rev;
|
|
break;
|
|
}
|
|
}
|
|
|
|
/* We must have determined the master key, or we're not running on a Switch. */
|
|
if (!g_determined_mkey_revision) {
|
|
return -1;
|
|
} else {
|
|
return 0;
|
|
}
|
|
}
|
|
|
|
unsigned int mkey_get_revision(void) {
|
|
if (!g_determined_mkey_revision) {
|
|
generic_panic();
|
|
}
|
|
|
|
return g_mkey_revision;
|
|
}
|
|
|
|
unsigned int mkey_get_keyslot(unsigned int revision) {
|
|
if (!g_determined_mkey_revision || revision >= MASTERKEY_REVISION_MAX) {
|
|
generic_panic();
|
|
}
|
|
|
|
if (revision > g_mkey_revision) {
|
|
generic_panic();
|
|
}
|
|
|
|
if (revision == g_mkey_revision) {
|
|
return KEYSLOT_SWITCH_MASTERKEY;
|
|
} else {
|
|
/* Load into a temp keyslot. */
|
|
set_aes_keyslot(KEYSLOT_SWITCH_TEMPKEY, g_old_masterkeys[revision], 0x10);
|
|
return KEYSLOT_SWITCH_TEMPKEY;
|
|
}
|
|
}
|