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Lockpick_RCM/source/keys/keys.c
shchmue d8ba2c8c94 keys: Use skb_set value
2021-07-11 15:00:34 -06:00

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/*
* Copyright (c) 2019-2020 shchmue
*
* 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 "keys.h"
#include "../config.h"
#include <display/di.h>
#include <gfx_utils.h>
#include "../gfx/tui.h"
#include "../hos/pkg1.h"
#include "../hos/pkg2.h"
#include "../hos/sept.h"
#include <libs/fatfs/ff.h>
#include <libs/nx_savedata/save.h>
#include <mem/heap.h>
#include <mem/mc.h>
#include <mem/minerva.h>
#include <mem/sdram.h>
#include <sec/se.h>
#include <sec/se_t210.h>
#include <sec/tsec.h>
#include <soc/fuse.h>
#include <mem/smmu.h>
#include <soc/t210.h>
#include "../storage/emummc.h"
#include "../storage/nx_emmc.h"
#include "../storage/nx_emmc_bis.h"
#include <storage/nx_sd.h>
#include <storage/sdmmc.h>
#include <utils/btn.h>
#include <utils/list.h>
#include <utils/sprintf.h>
#include <utils/util.h>
#include "key_sources.inl"
#include <string.h>
extern hekate_config h_cfg;
static u32 _key_count = 0, _titlekey_count = 0;
static u32 start_time, end_time;
u32 color_idx = 0;
static ALWAYS_INLINE u32 _read_le_u32(const void *buffer, u32 offset) {
return (*(u8*)(buffer + offset + 0) ) |
(*(u8*)(buffer + offset + 1) << 0x08) |
(*(u8*)(buffer + offset + 2) << 0x10) |
(*(u8*)(buffer + offset + 3) << 0x18);
}
static ALWAYS_INLINE u32 _read_be_u32(const void *buffer, u32 offset) {
return (*(u8*)(buffer + offset + 3) ) |
(*(u8*)(buffer + offset + 2) << 0x08) |
(*(u8*)(buffer + offset + 1) << 0x10) |
(*(u8*)(buffer + offset + 0) << 0x18);
}
// key functions
static int _key_exists(const void *data) { return memcmp(data, "\x00\x00\x00\x00\x00\x00\x00\x00", 8) != 0; };
static void _save_key(const char *name, const void *data, u32 len, char *outbuf);
static void _save_key_family(const char *name, const void *data, u32 start_key, u32 num_keys, u32 len, char *outbuf);
static void _generate_kek(u32 ks, const void *key_source, void *master_key, const void *kek_seed, const void *key_seed);
static void _get_device_key(u32 ks, void *out_device_key, u32 revision, const void *device_key, const void *new_device_key, const void *master_key);
// titlekey functions
static bool _test_key_pair(const void *E, const void *D, const void *N);
static ALWAYS_INLINE u8 *_find_tsec_fw(const u8 *pkg1) {
const u32 tsec_fw_align = 0x100;
const u32 tsec_fw_first_instruction = 0xCF42004D;
for (const u32 *pos = (const u32 *)pkg1; (u8 *)pos < pkg1 + PKG1_MAX_SIZE; pos += tsec_fw_align / sizeof(u32))
if (*pos == tsec_fw_first_instruction)
return (u8 *)pos;
return NULL;
}
static ALWAYS_INLINE u32 _get_tsec_fw_size(tsec_key_data_t *key_data) {
return key_data->blob0_size + sizeof(tsec_key_data_t) + key_data->blob1_size + key_data->blob2_size + key_data->blob3_size + key_data->blob4_size;
}
static u8 *_read_pkg1(const pkg1_id_t **pkg1_id) {
if (emummc_storage_init_mmc()) {
EPRINTF("Unable to init MMC.");
return NULL;
}
TPRINTFARGS("%kMMC init... ", colors[(color_idx++) % 6]);
// Read package1.
u8 *pkg1 = (u8 *)malloc(PKG1_MAX_SIZE);
if (!emummc_storage_set_mmc_partition(EMMC_BOOT0)) {
EPRINTF("Unable to set partition.");
return NULL;
}
if (!emummc_storage_read(PKG1_OFFSET / NX_EMMC_BLOCKSIZE, PKG1_MAX_SIZE / NX_EMMC_BLOCKSIZE, pkg1)) {
EPRINTF("Unable to read pkg1.");
return NULL;
}
u32 pk1_offset = h_cfg.t210b01 ? sizeof(bl_hdr_t210b01_t) : 0; // Skip T210B01 OEM header.
*pkg1_id = pkg1_identify(pkg1 + pk1_offset);
if (!*pkg1_id) {
EPRINTF("Unknown pkg1 version.\n Make sure you have the latest Lockpick_RCM.\n If a new firmware version just came out,\n Lockpick_RCM must be updated.\n Check Github for new release.");
gfx_hexdump(0, pkg1, 0x20);
return NULL;
}
return pkg1;
}
#define RELOC_META_OFF 0x7C
static bool _handle_sept(void *tsec_fw, u32 tsec_size, u32 kb, void *out_key) {
sd_mount();
if (!f_stat("sd:/sept/payload.bak", NULL)) {
f_unlink("sd:/sept/payload.bin");
f_rename("sd:/sept/payload.bak", "sd:/sept/payload.bin");
}
if (!h_cfg.sept_run) {
// bundle lp0 fw for sept instead of loading it from SD as hekate does
sdram_lp0_save_params(sdram_get_params_patched());
FIL fp;
if (f_stat("sd:/sept", NULL)) {
EPRINTF("On firmware 7.x+ but Sept missing.\nSkipping new key derivation...");
return true;
}
// backup post-reboot payload
if (!f_stat("sd:/sept/payload.bin", NULL)) {
if (f_rename("sd:/sept/payload.bin", "sd:/sept/payload.bak")) {
EPRINTF("Unable to backup payload.bin.");
return false;
}
}
// write self to payload.bin to run again when sept finishes
volatile reloc_meta_t *relocator = (reloc_meta_t *)(IPL_LOAD_ADDR + RELOC_META_OFF);
u32 payload_size = relocator->end - IPL_LOAD_ADDR;
if (f_open(&fp, "sd:/sept/payload.bin", FA_CREATE_NEW | FA_WRITE)) {
EPRINTF("Unable to write self to /sept/payload.bin.");
return false;
}
gfx_printf("%kWrite self to /sept/payload.bin...", colors[(color_idx++) % 6]);
if (f_write(&fp, (u8 *)IPL_LOAD_ADDR, payload_size, NULL)) {
EPRINTF("Unable to write self to /sept/payload.bin.");
f_close(&fp);
return false;
}
gfx_printf(" done");
f_close(&fp);
gfx_printf("%k\nRebooting to sept...\n\n", colors[(color_idx++) % 6]);
sdmmc_storage_end(&emmc_storage);
if (!reboot_to_sept((u8 *)tsec_fw, tsec_size, kb)) {
return false;
}
} else {
se_aes_key_get(se_key_acc_ctrl_get(12) == 0x6A ? 13 : 12, out_key, AES_128_KEY_SIZE);
}
return true;
}
static bool _derive_tsec_keys(tsec_ctxt_t *tsec_ctxt, u32 kb, key_derivation_ctx_t *keys) {
tsec_ctxt->fw = _find_tsec_fw(tsec_ctxt->pkg1);
if (!tsec_ctxt->fw) {
EPRINTF("Unable to locate TSEC firmware.");
return false;
}
minerva_periodic_training();
tsec_ctxt->size = _get_tsec_fw_size((tsec_key_data_t *)(tsec_ctxt->fw + TSEC_KEY_DATA_OFFSET));
if (tsec_ctxt->size > PKG1_MAX_SIZE) {
EPRINTF("Unexpected TSEC firmware size.");
return false;
}
if (kb >= KB_FIRMWARE_VERSION_700) {
if (!_handle_sept(tsec_ctxt->fw, tsec_ctxt->size, kb, keys->master_key[KB_FIRMWARE_VERSION_MAX])) {
return false;
}
} else if (kb == KB_FIRMWARE_VERSION_620) {
u8 *tsec_paged = (u8 *)page_alloc(3);
memcpy(tsec_paged, tsec_ctxt->fw, tsec_ctxt->size);
tsec_ctxt->fw = tsec_paged;
}
int res = 0;
u32 retries = 0;
// mc_disable_ahb_redirect();
while (tsec_query(keys->tsec_keys, kb, tsec_ctxt) < 0) {
memset(keys->tsec_keys, 0, sizeof(keys->tsec_keys));
retries++;
if (retries > 15) {
res = -1;
break;
}
}
// mc_enable_ahb_redirect();
if (res < 0) {
EPRINTFARGS("ERROR %x dumping TSEC.\n", res);
return false;
}
TPRINTFARGS("%kTSEC key(s)... ", colors[(color_idx++) % 6]);
return true;
}
static void _derive_master_key_mariko(key_derivation_ctx_t *keys) {
// Relies on the SBK being properly set in slot 14
se_aes_crypt_block_ecb(14, 0, keys->device_key_4x, device_master_key_source_kek_source);
// Relies on the Mariko KEK being properly set in slot 12
se_aes_unwrap_key(8, 12, &mariko_master_kek_sources[KB_FIRMWARE_VERSION_MAX - KB_FIRMWARE_VERSION_600]);
se_aes_crypt_block_ecb(8, 0, keys->master_key[KB_FIRMWARE_VERSION_MAX], master_key_source);
}
static void _derive_master_keys_post_620(u32 pkg1_kb, key_derivation_ctx_t *keys) {
// on firmware 6.2.0 only, the tsec_root_key is available
if (pkg1_kb == KB_FIRMWARE_VERSION_620 && _key_exists(keys->tsec_keys + AES_128_KEY_SIZE)) {
se_aes_key_set(8, keys->tsec_keys + AES_128_KEY_SIZE, AES_128_KEY_SIZE); // mkek6 = unwrap(mkeks6, tsecroot)
se_aes_crypt_block_ecb(8, 0, keys->master_kek[6], master_kek_sources[0]);
se_aes_key_set(8, keys->master_kek[6], AES_128_KEY_SIZE); // mkey = unwrap(mkek, mks)
se_aes_crypt_block_ecb(8, 0, keys->master_key[6], master_key_source);
}
if (pkg1_kb >= KB_FIRMWARE_VERSION_620) {
// derive all lower master keys in case keyblobs are bad
// handle sept version differences
for (u32 kb = pkg1_kb == KB_FIRMWARE_VERSION_620 ? KB_FIRMWARE_VERSION_620 : KB_FIRMWARE_VERSION_MAX; kb >= KB_FIRMWARE_VERSION_620; kb--) {
for (u32 i = kb; i > 0; i--) {
se_aes_key_set(8, keys->master_key[i], AES_128_KEY_SIZE);
se_aes_crypt_block_ecb(8, 0, keys->master_key[i - 1], master_key_vectors[i]);
}
se_aes_key_set(8, keys->master_key[0], AES_128_KEY_SIZE);
se_aes_crypt_block_ecb(8, 0, keys->temp_key, master_key_vectors[0]);
if (!_key_exists(keys->temp_key)) {
break;
}
memcpy(keys->master_key[kb - 1], keys->master_key[kb], AES_128_KEY_SIZE);
memset(keys->master_key[kb], 0, AES_128_KEY_SIZE);
}
if (_key_exists(keys->temp_key)) {
EPRINTFARGS("Unable to derive master key. kb = %d.", pkg1_kb);
memset(keys->master_key, 0, sizeof(keys->master_key));
}
}
}
static void _derive_master_keys_from_keyblobs(key_derivation_ctx_t *keys) {
u8 *keyblob_block = (u8 *)calloc(KB_FIRMWARE_VERSION_600 + 1, NX_EMMC_BLOCKSIZE);
encrypted_keyblob_t *current_keyblob = (encrypted_keyblob_t *)keyblob_block;
u32 keyblob_mac[AES_128_KEY_SIZE / 4] = {0};
if (h_cfg.sbk_set) {
u8 *aes_keys = (u8 *)calloc(0x1000, 1);
se_get_aes_keys(aes_keys + 0x800, aes_keys, AES_128_KEY_SIZE);
memcpy(keys->sbk, aes_keys + 14 * AES_128_KEY_SIZE, AES_128_KEY_SIZE);
free(aes_keys);
} else {
keys->sbk[0] = FUSE(FUSE_PRIVATE_KEY0);
keys->sbk[1] = FUSE(FUSE_PRIVATE_KEY1);
keys->sbk[2] = FUSE(FUSE_PRIVATE_KEY2);
keys->sbk[3] = FUSE(FUSE_PRIVATE_KEY3);
}
se_aes_key_set(8, keys->tsec_keys, sizeof(keys->tsec_keys) / 2);
if (!emummc_storage_read(KEYBLOB_OFFSET / NX_EMMC_BLOCKSIZE, KB_FIRMWARE_VERSION_600 + 1, keyblob_block)) {
EPRINTF("Unable to read keyblobs.");
}
for (u32 i = 0; i <= KB_FIRMWARE_VERSION_600; i++, current_keyblob++) {
minerva_periodic_training();
se_aes_crypt_block_ecb(8, 0, keys->keyblob_key[i], keyblob_key_source[i]); // temp = unwrap(kbks, tsec)
se_aes_crypt_block_ecb(14, 0, keys->keyblob_key[i], keys->keyblob_key[i]); // kbk = unwrap(temp, sbk)
se_aes_key_set(7, keys->keyblob_key[i], sizeof(keys->keyblob_key[i]));
se_aes_crypt_block_ecb(7, 0, keys->keyblob_mac_key[i], keyblob_mac_key_source); // kbm = unwrap(kbms, kbk)
if (i == 0) {
se_aes_crypt_block_ecb(7, 0, keys->device_key, per_console_key_source); // devkey = unwrap(pcks, kbk0)
se_aes_crypt_block_ecb(7, 0, keys->device_key_4x, device_master_key_source_kek_source);
}
// verify keyblob is not corrupt
se_aes_key_set(10, keys->keyblob_mac_key[i], sizeof(keys->keyblob_mac_key[i]));
se_aes_cmac(10, keyblob_mac, sizeof(keyblob_mac), current_keyblob->iv, sizeof(current_keyblob->iv) + sizeof(keyblob_t));
if (memcmp(current_keyblob->cmac, keyblob_mac, sizeof(keyblob_mac)) != 0) {
EPRINTFARGS("Keyblob %x corrupt.", i);
continue;
}
// decrypt keyblobs
se_aes_key_set(6, keys->keyblob_key[i], sizeof(keys->keyblob_key[i]));
se_aes_crypt_ctr(6, &keys->keyblob[i], sizeof(keyblob_t), &current_keyblob->key_data, sizeof(keyblob_t), current_keyblob->iv);
memcpy(keys->package1_key[i], keys->keyblob[i].package1_key, sizeof(keys->package1_key[i]));
memcpy(keys->master_kek[i], keys->keyblob[i].master_kek, sizeof(keys->master_kek[i]));
se_aes_key_set(7, keys->master_kek[i], sizeof(keys->master_kek[i]));
if (!_key_exists(keys->master_key[i])) {
se_aes_crypt_block_ecb(7, 0, keys->master_key[i], master_key_source);
}
}
free(keyblob_block);
}
static void _derive_bis_keys(key_derivation_ctx_t *keys) {
/* key = unwrap(source, wrapped_key):
key_set(ks, wrapped_key), block_ecb(ks, 0, key, source) -> final key in key
*/
minerva_periodic_training();
u32 key_generation = fuse_read_odm_keygen_rev();
if (key_generation)
key_generation--;
if (!(_key_exists(keys->device_key) || (key_generation && _key_exists(keys->master_key[0]) && _key_exists(keys->device_key_4x)))) {
return;
}
_get_device_key(8, keys->temp_key, key_generation, keys->device_key, keys->device_key_4x, keys->master_key[0]);
se_aes_key_set(8, keys->temp_key, AES_128_KEY_SIZE);
se_aes_unwrap_key(8, 8, retail_specific_aes_key_source); // kek = unwrap(rsaks, devkey)
se_aes_crypt_block_ecb(8, 0, keys->bis_key[0] + 0x00, bis_key_source[0] + 0x00); // bkey = unwrap(bkeys, kek)
se_aes_crypt_block_ecb(8, 0, keys->bis_key[0] + 0x10, bis_key_source[0] + 0x10);
// kek = generate_kek(bkeks, devkey, aeskek, aeskey)
_generate_kek(8, bis_kek_source, keys->temp_key, aes_kek_generation_source, aes_key_generation_source);
se_aes_crypt_block_ecb(8, 0, keys->bis_key[1] + 0x00, bis_key_source[1] + 0x00); // bkey = unwrap(bkeys, kek)
se_aes_crypt_block_ecb(8, 0, keys->bis_key[1] + 0x10, bis_key_source[1] + 0x10);
se_aes_crypt_block_ecb(8, 0, keys->bis_key[2] + 0x00, bis_key_source[2] + 0x00);
se_aes_crypt_block_ecb(8, 0, keys->bis_key[2] + 0x10, bis_key_source[2] + 0x10);
memcpy(keys->bis_key[3], keys->bis_key[2], 0x20);
}
static void _derive_misc_keys(key_derivation_ctx_t *keys, u32 *derivable_key_count) {
if (_key_exists(keys->master_key[0])) {
_generate_kek(8, header_kek_source, keys->master_key[0], aes_kek_generation_source, aes_key_generation_source);
se_aes_crypt_block_ecb(8, 0, keys->header_key + 0x00, header_key_source + 0x00);
se_aes_crypt_block_ecb(8, 0, keys->header_key + 0x10, header_key_source + 0x10);
}
if (_key_exists(keys->device_key) || (_key_exists(keys->master_key[0]) && _key_exists(keys->device_key_4x))) {
_get_device_key(8, keys->temp_key, 0, keys->device_key, keys->device_key_4x, keys->master_key[0]);
_generate_kek(8, save_mac_kek_source, keys->temp_key, aes_kek_generation_source, NULL);
se_aes_crypt_block_ecb(8, 0, keys->save_mac_key, save_mac_key_source);
}
if (_key_exists(keys->master_key[*derivable_key_count])) {
*derivable_key_count = KB_FIRMWARE_VERSION_MAX + 1;
}
for (u32 i = 0; i < *derivable_key_count; i++) {
if (!_key_exists(keys->master_key[i]))
continue;
for (u32 j = 0; j < 3; j++) {
_generate_kek(8, key_area_key_sources[j], keys->master_key[i], aes_kek_generation_source, NULL);
se_aes_crypt_block_ecb(8, 0, keys->key_area_key[j][i], aes_key_generation_source);
}
se_aes_key_set(8, keys->master_key[i], AES_128_KEY_SIZE);
se_aes_crypt_block_ecb(8, 0, keys->package2_key[i], package2_key_source);
se_aes_crypt_block_ecb(8, 0, keys->titlekek[i], titlekek_source);
}
// derive eticket_rsa_kek and ssl_rsa_kek
if (_key_exists(keys->master_key[0])) {
for (u32 i = 0; i < AES_128_KEY_SIZE; i++)
keys->temp_key[i] = aes_kek_generation_source[i] ^ aes_kek_seed_03[i];
_generate_kek(8, eticket_rsa_kekek_source, keys->master_key[0], keys->temp_key, NULL);
se_aes_crypt_block_ecb(8, 0, keys->eticket_rsa_kek, eticket_rsa_kek_source);
for (u32 i = 0; i < AES_128_KEY_SIZE; i++)
keys->temp_key[i] = aes_kek_generation_source[i] ^ aes_kek_seed_01[i];
_generate_kek(8, ssl_rsa_kek_source_x, keys->master_key[0], keys->temp_key, NULL);
se_aes_crypt_block_ecb(8, 0, keys->ssl_rsa_kek, ssl_rsa_kek_source_y);
}
}
static bool _get_titlekeys_from_save(u32 buf_size, const u8 *save_mac_key, titlekey_buffer_t *titlekey_buffer, rsa_keypair_t *rsa_keypair) {
FIL fp;
u64 br = buf_size;
u64 offset = 0;
u32 file_tkey_count = 0;
u32 save_x = gfx_con.x, save_y = gfx_con.y;
bool is_personalized = rsa_keypair != NULL;
u32 start_titlekey_count = _titlekey_count;
char titlekey_save_path[32] = "bis:/save/80000000000000E1";
if (is_personalized) {
titlekey_save_path[25] = '2';
gfx_printf("\n%kPersonalized... ", colors[color_idx % 6]);
} else {
gfx_printf("\n%kCommon... ", colors[color_idx % 6]);
}
if (f_open(&fp, titlekey_save_path, FA_READ | FA_OPEN_EXISTING)) {
EPRINTF("Unable to open e1 save. Skipping.");
return false;
}
save_ctx_t *save_ctx = calloc(1, sizeof(save_ctx_t));
save_init(save_ctx, &fp, save_mac_key, 0);
bool save_process_success = save_process(save_ctx);
TPRINTF("\n Save process...");
if (!save_process_success) {
EPRINTF("Failed to process es save.");
f_close(&fp);
save_free_contexts(save_ctx);
free(save_ctx);
return false;
}
const char ticket_bin_path[32] = "/ticket.bin";
const char ticket_list_bin_path[32] = "/ticket_list.bin";
save_data_file_ctx_t ticket_file;
if (!save_open_file(save_ctx, &ticket_file, ticket_list_bin_path, OPEN_MODE_READ)) {
EPRINTF("Unable to locate ticket_list.bin in save.");
f_close(&fp);
save_free_contexts(save_ctx);
free(save_ctx);
return false;
}
bool terminator_reached = false;
while (offset < ticket_file.size && !terminator_reached) {
if (!save_data_file_read(&ticket_file, &br, offset, titlekey_buffer->read_buffer, buf_size) || titlekey_buffer->read_buffer[0] == 0 || br != buf_size)
break;
offset += br;
minerva_periodic_training();
ticket_record_t *curr_ticket_record = (ticket_record_t *)titlekey_buffer->read_buffer;
for (u32 i = 0; i < buf_size; i += sizeof(ticket_record_t), curr_ticket_record++) {
if (curr_ticket_record->rights_id[0] == 0xFF) {
terminator_reached = true;
break;
}
file_tkey_count++;
}
}
TPRINTF(" Count keys...");
if (!save_open_file(save_ctx, &ticket_file, ticket_bin_path, OPEN_MODE_READ)) {
EPRINTF("Unable to locate ticket.bin in save.");
f_close(&fp);
save_free_contexts(save_ctx);
free(save_ctx);
return false;
}
const u32 ticket_sig_type_rsa2048_sha256 = 0x10004;
offset = 0;
terminator_reached = false;
u32 pct = 0, last_pct = 0, i = 0;
while (offset < ticket_file.size && !terminator_reached) {
if (!save_data_file_read(&ticket_file, &br, offset, titlekey_buffer->read_buffer, buf_size) || titlekey_buffer->read_buffer[0] == 0 || br != buf_size)
break;
offset += br;
ticket_t *curr_ticket = (ticket_t *)titlekey_buffer->read_buffer;
for (u32 j = 0; j < buf_size; j += sizeof(ticket_t), curr_ticket++) {
minerva_periodic_training();
pct = (_titlekey_count - start_titlekey_count) * 100 / file_tkey_count;
if (pct > last_pct && pct <= 100) {
last_pct = pct;
tui_pbar(save_x, save_y, pct, COLOR_GREEN, 0xFF155500);
}
if (i == file_tkey_count || curr_ticket->signature_type == 0) {
terminator_reached = true;
break;
}
if (curr_ticket->signature_type != ticket_sig_type_rsa2048_sha256) {
i++;
continue;
}
if (is_personalized) {
se_rsa_exp_mod(0, curr_ticket->titlekey_block, sizeof(curr_ticket->titlekey_block), curr_ticket->titlekey_block, sizeof(curr_ticket->titlekey_block));
if (se_rsa_oaep_decode(
curr_ticket->titlekey_block, sizeof(titlekey_buffer->titlekeys[0]),
null_hash, sizeof(null_hash),
curr_ticket->titlekey_block, sizeof(curr_ticket->titlekey_block)
) != sizeof(titlekey_buffer->titlekeys[0])
)
continue;
}
memcpy(titlekey_buffer->rights_ids[_titlekey_count], curr_ticket->rights_id, sizeof(titlekey_buffer->rights_ids[0]));
memcpy(titlekey_buffer->titlekeys[_titlekey_count], curr_ticket->titlekey_block, sizeof(titlekey_buffer->titlekeys[0]));
_titlekey_count++;
i++;
}
}
tui_pbar(save_x, save_y, 100, COLOR_GREEN, 0xFF155500);
f_close(&fp);
save_free_contexts(save_ctx);
free(save_ctx);
gfx_con_setpos(0, save_y);
if (is_personalized) {
TPRINTFARGS("\n%kPersonalized... ", colors[(color_idx++) % 6]);
} else {
TPRINTFARGS("\n%kCommon... ", colors[(color_idx++) % 6]);
}
gfx_printf("\n\n\n");
return true;
}
static bool _derive_sd_seed(key_derivation_ctx_t *keys) {
FIL fp;
u32 read_bytes = 0;
char *private_path = malloc(200);
strcpy(private_path, "sd:/");
if (emu_cfg.nintendo_path && (emu_cfg.enabled || !h_cfg.emummc_force_disable)) {
strcat(private_path, emu_cfg.nintendo_path);
} else {
strcat(private_path, "Nintendo");
}
strcat(private_path, "/Contents/private");
FRESULT fr = f_open(&fp, private_path, FA_READ | FA_OPEN_EXISTING);
free(private_path);
if (fr) {
EPRINTF("Unable to open SD seed vector. Skipping.");
return false;
}
// get sd seed verification vector
if (f_read(&fp, keys->temp_key, AES_128_KEY_SIZE, &read_bytes) || read_bytes != AES_128_KEY_SIZE) {
EPRINTF("Unable to read SD seed vector. Skipping.");
f_close(&fp);
return false;
}
f_close(&fp);
// this file is small enough that parsing the savedata properly is slower
if (f_open(&fp, "bis:/save/8000000000000043", FA_READ | FA_OPEN_EXISTING)) {
EPRINTF("Unable to open ns_appman save.\nSkipping SD seed.");
return false;
}
u8 read_buf[0x20] __attribute__((aligned(4))) = {0};
for (u32 i = 0x8000; i < f_size(&fp); i += 0x4000) {
if (f_lseek(&fp, i) || f_read(&fp, read_buf, 0x20, &read_bytes) || read_bytes != 0x20)
break;
if (!memcmp(keys->temp_key, read_buf, sizeof(keys->temp_key))) {
memcpy(keys->sd_seed, read_buf + 0x10, sizeof(keys->sd_seed));
break;
}
}
f_close(&fp);
TPRINTFARGS("%kSD Seed... ", colors[(color_idx++) % 6]);
return true;
}
static bool _derive_titlekeys(key_derivation_ctx_t *keys, titlekey_buffer_t *titlekey_buffer) {
if (!_key_exists(keys->eticket_rsa_kek)) {
return false;
}
gfx_printf("%kTitlekeys... \n", colors[(color_idx++) % 6]);
rsa_keypair_t rsa_keypair = {0};
if (!emummc_storage_read(NX_EMMC_CALIBRATION_OFFSET / NX_EMMC_BLOCKSIZE, NX_EMMC_CALIBRATION_SIZE / NX_EMMC_BLOCKSIZE, titlekey_buffer->read_buffer)) {
EPRINTF("Unable to read PRODINFO.");
return false;
}
se_aes_xts_crypt(1, 0, 0, 0, titlekey_buffer->read_buffer, titlekey_buffer->read_buffer, XTS_CLUSTER_SIZE, NX_EMMC_CALIBRATION_SIZE / XTS_CLUSTER_SIZE);
nx_emmc_cal0_t *cal0 = (nx_emmc_cal0_t *)titlekey_buffer->read_buffer;
if (cal0->magic != MAGIC_CAL0) {
EPRINTF("Invalid CAL0 magic. Check BIS key 0.");
return false;
}
// settings sysmodule manually zeroes this out below cal version 9
u32 keypair_generation = cal0->version <= 8 ? 0 : cal0->ext_ecc_rsa2048_eticket_key_ver;
if (keypair_generation) {
keypair_generation--;
for (u32 i = 0; i < AES_128_KEY_SIZE; i++)
keys->temp_key[i] = aes_kek_generation_source[i] ^ aes_kek_seed_03[i];
u32 temp_device_key[AES_128_KEY_SIZE / 4] = {0};
_get_device_key(7, temp_device_key, keypair_generation, keys->device_key, keys->device_key_4x, keys->master_key[0]);
_generate_kek(7, eticket_rsa_kekek_source, temp_device_key, keys->temp_key, NULL);
se_aes_crypt_block_ecb(7, 0, keys->eticket_rsa_kek_personalized, eticket_rsa_kek_source);
memcpy(keys->temp_key, keys->eticket_rsa_kek_personalized, sizeof(keys->temp_key));
} else {
memcpy(keys->temp_key, keys->eticket_rsa_kek, sizeof(keys->temp_key));
}
se_aes_key_set(6, keys->temp_key, sizeof(keys->temp_key));
se_aes_crypt_ctr(6, &rsa_keypair, sizeof(rsa_keypair), cal0->ext_ecc_rsa2048_eticket_key, sizeof(cal0->ext_ecc_rsa2048_eticket_key), cal0->ext_ecc_rsa2048_eticket_key_iv);
// Check public exponent is 65537 big endian
if (_read_be_u32(rsa_keypair.public_exponent, 0) != 65537) {
EPRINTF("Invalid public exponent.");
return false;
}
if (!_test_key_pair(rsa_keypair.public_exponent, rsa_keypair.private_exponent, rsa_keypair.modulus)) {
EPRINTF("Invalid keypair. Check eticket_rsa_kek.");
return false;
}
se_rsa_key_set(0, rsa_keypair.modulus, sizeof(rsa_keypair.modulus), rsa_keypair.private_exponent, sizeof(rsa_keypair.private_exponent));
const u32 buf_size = 0x4000;
_get_titlekeys_from_save(buf_size, keys->save_mac_key, titlekey_buffer, NULL);
_get_titlekeys_from_save(buf_size, keys->save_mac_key, titlekey_buffer, &rsa_keypair);
gfx_printf("\n%k Found %d titlekeys.\n", colors[(color_idx++) % 6], _titlekey_count);
return true;
}
static bool _derive_emmc_keys(key_derivation_ctx_t *keys, titlekey_buffer_t *titlekey_buffer) {
// Set BIS keys.
// PRODINFO/PRODINFOF
se_aes_key_set(0, keys->bis_key[0] + 0x00, AES_128_KEY_SIZE);
se_aes_key_set(1, keys->bis_key[0] + 0x10, AES_128_KEY_SIZE);
// SAFE
se_aes_key_set(2, keys->bis_key[1] + 0x00, AES_128_KEY_SIZE);
se_aes_key_set(3, keys->bis_key[1] + 0x10, AES_128_KEY_SIZE);
// SYSTEM/USER
se_aes_key_set(4, keys->bis_key[2] + 0x00, AES_128_KEY_SIZE);
se_aes_key_set(5, keys->bis_key[2] + 0x10, AES_128_KEY_SIZE);
if (!emummc_storage_set_mmc_partition(EMMC_GPP)) {
EPRINTF("Unable to set partition.");
return false;
}
// Parse eMMC GPT.
LIST_INIT(gpt);
nx_emmc_gpt_parse(&gpt, &emmc_storage);
emmc_part_t *system_part = nx_emmc_part_find(&gpt, "SYSTEM");
if (!system_part) {
EPRINTF("Unable to locate System partition.");
nx_emmc_gpt_free(&gpt);
return false;
}
nx_emmc_bis_init(system_part);
if (f_mount(&emmc_fs, "bis:", 1)) {
EPRINTF("Unable to mount system partition.");
nx_emmc_gpt_free(&gpt);
return false;
}
if (!_derive_sd_seed(keys)) {
EPRINTF("Unable to get SD seed.");
}
bool res = _derive_titlekeys(keys, titlekey_buffer);
if (!res) {
EPRINTF("Unable to derive titlekeys.");
}
f_mount(NULL, "bis:", 1);
nx_emmc_gpt_free(&gpt);
return res;
}
// The security engine supports partial key override for locked keyslots
// This allows for a manageable brute force on a PC
// Then we can recover the Mariko KEK, BEK, unique SBK and SSK
static void _save_mariko_partial_keys(char *text_buffer) {
u32 pos = 0;
u32 zeros[4] = {0};
u8 *data = malloc(4 * AES_128_KEY_SIZE);
for (u32 ks = 12; ks < 16; ks++) {
// First, encrypt zeros with complete key
se_aes_crypt_block_ecb(ks, 1, &data[3 * AES_128_KEY_SIZE], zeros);
pos += s_printf(&text_buffer[pos], "%d\n", ks);
// We only need to overwrite 3 of the dwords of the key
for (u32 i = 0; i < 3; i++) {
// Overwrite ith dword of key with zeros
se_aes_key_partial_set(ks, i, 0);
// Encrypt zeros with more of the key zeroed out
se_aes_crypt_block_ecb(ks, 1, &data[(2 - i) * AES_128_KEY_SIZE], zeros);
}
for (u32 i = 0; i < 4; i++) {
for (u32 j = 0; j < AES_128_KEY_SIZE; j++)
pos += s_printf(&text_buffer[pos], "%02x", data[i * AES_128_KEY_SIZE + j]);
pos += s_printf(&text_buffer[pos], "\n");
}
}
free(data);
sd_save_to_file(text_buffer, strlen(text_buffer), "sd:/switch/partialaes.keys");
gfx_printf("%kWrote partials to sd:/switch/partialaes.keys\n", colors[(color_idx++) % 6]);
}
static void _save_keys_to_sd(key_derivation_ctx_t *keys, titlekey_buffer_t *titlekey_buffer, const pkg1_id_t *pkg1_id, u32 start_whole_operation_time, u32 derivable_key_count) {
char *text_buffer = NULL;
if (!sd_mount()) {
EPRINTF("Unable to mount SD.");
return;
}
u32 text_buffer_size = MAX(_titlekey_count * sizeof(titlekey_text_buffer_t) + 1, 0x4000);
text_buffer = (char *)calloc(1, text_buffer_size);
SAVE_KEY(aes_kek_generation_source);
SAVE_KEY(aes_key_generation_source);
SAVE_KEY(bis_kek_source);
SAVE_KEY_FAMILY_VAR(bis_key, keys->bis_key, 0);
SAVE_KEY_FAMILY(bis_key_source, 0);
SAVE_KEY_VAR(device_key, keys->device_key);
SAVE_KEY_VAR(device_key_4x, keys->device_key_4x);
SAVE_KEY_VAR(eticket_rsa_kek, keys->eticket_rsa_kek);
SAVE_KEY_VAR(eticket_rsa_kek_personalized, keys->eticket_rsa_kek_personalized);
SAVE_KEY(eticket_rsa_kek_source);
SAVE_KEY(eticket_rsa_kekek_source);
SAVE_KEY(header_kek_source);
SAVE_KEY_VAR(header_key, keys->header_key);
SAVE_KEY(header_key_source);
SAVE_KEY_FAMILY_VAR(key_area_key_application, keys->key_area_key[0], 0);
SAVE_KEY_VAR(key_area_key_application_source, key_area_key_sources[0]);
SAVE_KEY_FAMILY_VAR(key_area_key_ocean, keys->key_area_key[1], 0);
SAVE_KEY_VAR(key_area_key_ocean_source, key_area_key_sources[1]);
SAVE_KEY_FAMILY_VAR(key_area_key_system, keys->key_area_key[2], 0);
SAVE_KEY_VAR(key_area_key_system_source, key_area_key_sources[2]);
SAVE_KEY_FAMILY_VAR(keyblob, keys->keyblob, 0);
SAVE_KEY_FAMILY_VAR(keyblob_key, keys->keyblob_key, 0);
SAVE_KEY_FAMILY(keyblob_key_source, 0);
SAVE_KEY_FAMILY_VAR(keyblob_mac_key, keys->keyblob_mac_key, 0);
SAVE_KEY(keyblob_mac_key_source);
SAVE_KEY_FAMILY_VAR(master_kek, keys->master_kek, 0);
SAVE_KEY_FAMILY_VAR(master_kek_source, master_kek_sources, KB_FIRMWARE_VERSION_620);
SAVE_KEY_FAMILY_VAR(master_key, keys->master_key, 0);
SAVE_KEY(master_key_source);
SAVE_KEY_FAMILY_VAR(package1_key, keys->package1_key, 0);
SAVE_KEY_FAMILY_VAR(package2_key, keys->package2_key, 0);
SAVE_KEY(package2_key_source);
SAVE_KEY(per_console_key_source);
SAVE_KEY(retail_specific_aes_key_source);
for (u32 i = 0; i < AES_128_KEY_SIZE; i++)
keys->temp_key[i] = aes_kek_generation_source[i] ^ aes_kek_seed_03[i];
SAVE_KEY_VAR(rsa_oaep_kek_generation_source, keys->temp_key);
for (u32 i = 0; i < AES_128_KEY_SIZE; i++)
keys->temp_key[i] = aes_kek_generation_source[i] ^ aes_kek_seed_01[i];
SAVE_KEY_VAR(rsa_private_kek_generation_source, keys->temp_key);
SAVE_KEY(save_mac_kek_source);
SAVE_KEY_VAR(save_mac_key, keys->save_mac_key);
SAVE_KEY(save_mac_key_source);
SAVE_KEY(save_mac_sd_card_kek_source);
SAVE_KEY(save_mac_sd_card_key_source);
SAVE_KEY(sd_card_custom_storage_key_source);
SAVE_KEY(sd_card_kek_source);
SAVE_KEY(sd_card_nca_key_source);
SAVE_KEY(sd_card_save_key_source);
SAVE_KEY_VAR(sd_seed, keys->sd_seed);
SAVE_KEY_VAR(secure_boot_key, keys->sbk);
SAVE_KEY_VAR(ssl_rsa_kek, keys->ssl_rsa_kek);
SAVE_KEY(ssl_rsa_kek_source_x);
SAVE_KEY(ssl_rsa_kek_source_y);
SAVE_KEY_FAMILY_VAR(titlekek, keys->titlekek, 0);
SAVE_KEY(titlekek_source);
_save_key("tsec_key", keys->tsec_keys, AES_128_KEY_SIZE, text_buffer);
if (pkg1_id->kb == KB_FIRMWARE_VERSION_620)
_save_key("tsec_root_key", keys->tsec_keys + AES_128_KEY_SIZE, AES_128_KEY_SIZE, text_buffer);
end_time = get_tmr_us();
gfx_printf("\n%k Found %d keys.\n\n", colors[(color_idx++) % 6], _key_count);
gfx_printf("%kLockpick totally done in %d us\n\n", colors[(color_idx++) % 6], end_time - start_whole_operation_time);
gfx_printf("%kFound through master_key_%02x.\n\n", colors[(color_idx++) % 6], derivable_key_count - 1);
f_mkdir("sd:/switch");
char keyfile_path[30] = "sd:/switch/prod.keys";
if (fuse_read_odm(4) & 3)
s_printf(&keyfile_path[11], "dev.keys");
FILINFO fno;
if (!sd_save_to_file(text_buffer, strlen(text_buffer), keyfile_path) && !f_stat(keyfile_path, &fno)) {
gfx_printf("%kWrote %d bytes to %s\n", colors[(color_idx++) % 6], (u32)fno.fsize, keyfile_path);
} else
EPRINTF("Unable to save keys to SD.");
if (h_cfg.t210b01) {
memset(text_buffer, 0, text_buffer_size);
_save_mariko_partial_keys(text_buffer);
}
if (_titlekey_count == 0) {
free(text_buffer);
return;
}
memset(text_buffer, 0, text_buffer_size);
titlekey_text_buffer_t *titlekey_text = (titlekey_text_buffer_t *)text_buffer;
for (u32 i = 0; i < _titlekey_count; i++) {
for (u32 j = 0; j < AES_128_KEY_SIZE; j++)
s_printf(&titlekey_text[i].rights_id[j * 2], "%02x", titlekey_buffer->rights_ids[i][j]);
s_printf(titlekey_text[i].equals, " = ");
for (u32 j = 0; j < AES_128_KEY_SIZE; j++)
s_printf(&titlekey_text[i].titlekey[j * 2], "%02x", titlekey_buffer->titlekeys[i][j]);
s_printf(titlekey_text[i].newline, "\n");
}
s_printf(&keyfile_path[11], "title.keys");
if (!sd_save_to_file(text_buffer, strlen(text_buffer), keyfile_path) && !f_stat(keyfile_path, &fno)) {
gfx_printf("%kWrote %d bytes to %s\n", colors[(color_idx++) % 6], (u32)fno.fsize, keyfile_path);
} else
EPRINTF("Unable to save titlekeys to SD.");
free(text_buffer);
}
static void _derive_keys() {
u32 start_whole_operation_time = get_tmr_us();
const pkg1_id_t *pkg1_id;
u8 *pkg1 = _read_pkg1(&pkg1_id);
if (!pkg1) {
return;
}
u32 derivable_key_count = pkg1_id->kb >= KB_FIRMWARE_VERSION_620 ? pkg1_id->kb + 1 : 6;
bool res = true;
key_derivation_ctx_t __attribute__((aligned(4))) keys = {0};
if (!h_cfg.t210b01) {
tsec_ctxt_t tsec_ctxt;
tsec_ctxt.pkg1 = pkg1;
res =_derive_tsec_keys(&tsec_ctxt, pkg1_id->kb, &keys);
}
free(pkg1);
if (res == false) {
return;
}
// Master key derivation
if (h_cfg.t210b01) {
_derive_master_key_mariko(&keys);
_derive_master_keys_post_620(KB_FIRMWARE_VERSION_MAX, &keys);
} else {
_derive_master_keys_post_620(pkg1_id->kb, &keys);
_derive_master_keys_from_keyblobs(&keys);
}
TPRINTFARGS("%kMaster keys... ", colors[(color_idx++) % 6]);
_derive_bis_keys(&keys);
TPRINTFARGS("%kBIS keys... ", colors[(color_idx++) % 6]);
_derive_misc_keys(&keys, &derivable_key_count);
titlekey_buffer_t *titlekey_buffer = (titlekey_buffer_t *)TITLEKEY_BUF_ADR;
// BIS key for SYSTEM partition
if (_key_exists(keys.bis_key[2])) {
_derive_emmc_keys(&keys, titlekey_buffer);
} else {
EPRINTF("Missing needed BIS keys.\nSkipping SD seed and titlekeys.");
}
_save_keys_to_sd(&keys, titlekey_buffer, pkg1_id, start_whole_operation_time, derivable_key_count);
}
void dump_keys() {
display_backlight_brightness(h_cfg.backlight, 1000);
gfx_clear_grey(0x1B);
gfx_con_setpos(0, 0);
gfx_printf("[%kLo%kck%kpi%kck%k_R%kCM%k v%d.%d.%d%k]\n\n",
colors[0], colors[1], colors[2], colors[3], colors[4], colors[5], 0xFFFF00FF, LP_VER_MJ, LP_VER_MN, LP_VER_BF, 0xFFCCCCCC);
_key_count = 0;
_titlekey_count = 0;
color_idx = 0;
start_time = get_tmr_us();
_derive_keys();
emummc_load_cfg();
// Ignore whether emummc is enabled.
h_cfg.emummc_force_disable = emu_cfg.sector == 0 && !emu_cfg.path;
emu_cfg.enabled = !h_cfg.emummc_force_disable;
emummc_storage_end(&emmc_storage);
gfx_printf("\n%kPress a button to return to the menu.", colors[(color_idx) % 6], colors[(color_idx + 1) % 6], colors[(color_idx + 2) % 6]);
btn_wait();
gfx_clear_grey(0x1B);
}
static void _save_key(const char *name, const void *data, u32 len, char *outbuf) {
if (!_key_exists(data))
return;
u32 pos = strlen(outbuf);
pos += s_printf(&outbuf[pos], "%s = ", name);
for (u32 i = 0; i < len; i++)
pos += s_printf(&outbuf[pos], "%02x", *(u8*)(data + i));
s_printf(&outbuf[pos], "\n");
_key_count++;
}
static void _save_key_family(const char *name, const void *data, u32 start_key, u32 num_keys, u32 len, char *outbuf) {
char *temp_name = calloc(1, 0x40);
for (u32 i = 0; i < num_keys; i++) {
s_printf(temp_name, "%s_%02x", name, i + start_key);
_save_key(temp_name, data + i * len, len, outbuf);
}
free(temp_name);
}
static void _generate_kek(u32 ks, const void *key_source, void *master_key, const void *kek_seed, const void *key_seed) {
if (!_key_exists(key_source) || !_key_exists(master_key) || !_key_exists(kek_seed))
return;
se_aes_key_set(ks, master_key, AES_128_KEY_SIZE);
se_aes_unwrap_key(ks, ks, kek_seed);
se_aes_unwrap_key(ks, ks, key_source);
if (key_seed && _key_exists(key_seed))
se_aes_unwrap_key(ks, ks, key_seed);
}
static void _get_device_key(u32 ks, void *out_device_key, u32 revision, const void *device_key, const void *new_device_key, const void *master_key) {
if (revision == KB_FIRMWARE_VERSION_100_200 && !h_cfg.t210b01) {
memcpy(out_device_key, device_key, AES_128_KEY_SIZE);
return;
}
if (revision >= KB_FIRMWARE_VERSION_400) {
revision -= KB_FIRMWARE_VERSION_400;
} else {
revision = 0;
}
u32 temp_key[AES_128_KEY_SIZE / 4] = {0};
se_aes_key_set(ks, new_device_key, AES_128_KEY_SIZE);
se_aes_crypt_ecb(ks, 0, temp_key, AES_128_KEY_SIZE, device_master_key_source_sources[revision], AES_128_KEY_SIZE);
se_aes_key_set(ks, master_key, AES_128_KEY_SIZE);
se_aes_unwrap_key(ks, ks, device_master_kek_sources[revision]);
se_aes_crypt_ecb(ks, 0, out_device_key, AES_128_KEY_SIZE, temp_key, AES_128_KEY_SIZE);
}
static bool _test_key_pair(const void *public_exponent, const void *private_exponent, const void *modulus) {
u8 plaintext[RSA_2048_KEY_SIZE] __attribute__((aligned(4))) = {0},
ciphertext[RSA_2048_KEY_SIZE] __attribute__((aligned(4))) = {0},
work[RSA_2048_KEY_SIZE] __attribute__((aligned(4))) = {0};
// 0xCAFEBABE
plaintext[0xfc] = 0xca; plaintext[0xfd] = 0xfe; plaintext[0xfe] = 0xba; plaintext[0xff] = 0xbe;
se_rsa_key_set(0, modulus, RSA_2048_KEY_SIZE, private_exponent, RSA_2048_KEY_SIZE);
se_rsa_exp_mod(0, ciphertext, RSA_2048_KEY_SIZE, plaintext, RSA_2048_KEY_SIZE);
se_rsa_key_set(0, modulus, RSA_2048_KEY_SIZE, public_exponent, 4);
se_rsa_exp_mod(0, work, RSA_2048_KEY_SIZE, ciphertext, RSA_2048_KEY_SIZE);
return !memcmp(plaintext, work, RSA_2048_KEY_SIZE);
}
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