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Atmosphere/exosphere/src/package2.c
Michael Scire 85669ef491 Fix off-by-one (thanks @CtCaer)
2019-02-20 04:52:44 -08:00

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/*
* 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 <string.h>
#include "utils.h"
#include "memory_map.h"
#include "bootup.h"
#include "cpu_context.h"
#include "package2.h"
#include "configitem.h"
#include "se.h"
#include "interrupt.h"
#include "masterkey.h"
#include "arm.h"
#include "pmc.h"
#include "randomcache.h"
#include "timers.h"
#include "bootconfig.h"
#include "sysctr0.h"
#include "exocfg.h"
#include "smc_api.h"
extern void *__start_cold_addr;
extern size_t __bin_size;
static const uint8_t new_device_key_sources[MASTERKEY_NUM_NEW_DEVICE_KEYS][0x10] = {
{0x8B, 0x4E, 0x1C, 0x22, 0x42, 0x07, 0xC8, 0x73, 0x56, 0x94, 0x08, 0x8B, 0xCC, 0x47, 0x0F, 0x5D}, /* 4.x New Device Key Source. */
{0x6C, 0xEF, 0xC6, 0x27, 0x8B, 0xEC, 0x8A, 0x91, 0x99, 0xAB, 0x24, 0xAC, 0x4F, 0x1C, 0x8F, 0x1C}, /* 5.x New Device Key Source. */
{0x70, 0x08, 0x1B, 0x97, 0x44, 0x64, 0xF8, 0x91, 0x54, 0x9D, 0xC6, 0x84, 0x8F, 0x1A, 0xB2, 0xE4}, /* 6.x New Device Key Source. */
{0x8E, 0x09, 0x1F, 0x7A, 0xBB, 0xCA, 0x6A, 0xFB, 0xB8, 0x9B, 0xD5, 0xC1, 0x25, 0x9C, 0xA9, 0x17}, /* 6.2.0 New Device Key Source. */
{0x8F, 0x77, 0x5A, 0x96, 0xB0, 0x94, 0xFD, 0x8D, 0x28, 0xE4, 0x19, 0xC8, 0x16, 0x1C, 0xDB, 0x3D}, /* 7.0.0 New Device Key Source. */
};
static const uint8_t new_device_keygen_sources[MASTERKEY_NUM_NEW_DEVICE_KEYS][0x10] = {
{0x88, 0x62, 0x34, 0x6E, 0xFA, 0xF7, 0xD8, 0x3F, 0xE1, 0x30, 0x39, 0x50, 0xF0, 0xB7, 0x5D, 0x5D}, /* 4.x New Device Keygen Source. */
{0x06, 0x1E, 0x7B, 0xE9, 0x6D, 0x47, 0x8C, 0x77, 0xC5, 0xC8, 0xE7, 0x94, 0x9A, 0xA8, 0x5F, 0x2E}, /* 5.x New Device Keygen Source. */
{0x99, 0xFA, 0x98, 0xBD, 0x15, 0x1C, 0x72, 0xFD, 0x7D, 0x9A, 0xD5, 0x41, 0x00, 0xFD, 0xB2, 0xEF}, /* 6.x New Device Keygen Source. */
{0x81, 0x3C, 0x6C, 0xBF, 0x5D, 0x21, 0xDE, 0x77, 0x20, 0xD9, 0x6C, 0xE3, 0x22, 0x06, 0xAE, 0xBB}, /* 6.2.0 New Device Keygen Source. */
{0x86, 0x61, 0xB0, 0x16, 0xFA, 0x7A, 0x9A, 0xEA, 0xF6, 0xF5, 0xBE, 0x1A, 0x13, 0x5B, 0x6D, 0x9E}, /* 7.0.0 New Device Keygen Source. */
};
static const uint8_t new_device_keygen_sources_dev[MASTERKEY_NUM_NEW_DEVICE_KEYS][0x10] = {
{0xD6, 0xBD, 0x9F, 0xC6, 0x18, 0x09, 0xE1, 0x96, 0x20, 0x39, 0x60, 0xD2, 0x89, 0x83, 0x31, 0x34}, /* 4.x New Device Keygen Source. */
{0x59, 0x2D, 0x20, 0x69, 0x33, 0xB5, 0x17, 0xBA, 0xCF, 0xB1, 0x4E, 0xFD, 0xE4, 0xC2, 0x7B, 0xA8}, /* 5.x New Device Keygen Source. */
{0xF6, 0xD8, 0x59, 0x63, 0x8F, 0x47, 0xCB, 0x4A, 0xD8, 0x74, 0x05, 0x7F, 0x88, 0x92, 0x33, 0xA5}, /* 6.x New Device Keygen Source. */
{0x20, 0xAB, 0xF2, 0x0F, 0x05, 0xE3, 0xDE, 0x2E, 0xA1, 0xFB, 0x37, 0x5E, 0x8B, 0x22, 0x1A, 0x38}, /* 6.2.0 New Device Keygen Source. */
{0x60, 0xAE, 0x56, 0x68, 0x11, 0xE2, 0x0C, 0x99, 0xDE, 0x05, 0xAE, 0x68, 0x78, 0x85, 0x04, 0xAE}, /* 6.2.0 New Device Keygen Source. */
};
static const uint8_t new_master_kek_sources[MASTERKEY_REVISION_700_CURRENT - MASTERKEY_REVISION_600_610][0x10] = {
{0x37, 0x4B, 0x77, 0x29, 0x59, 0xB4, 0x04, 0x30, 0x81, 0xF6, 0xE5, 0x8C, 0x6D, 0x36, 0x17, 0x9A}, /* 6.2.0 Master Kek Source. */
{0x9A, 0x3E, 0xA9, 0xAB, 0xFD, 0x56, 0x46, 0x1C, 0x9B, 0xF6, 0x48, 0x7F, 0x5C, 0xFA, 0x09, 0x5C}, /* 7.0.0 Master Kek Source. */
};
static const uint8_t keyblob_key_seed_00[0x10] = {
0xDF, 0x20, 0x6F, 0x59, 0x44, 0x54, 0xEF, 0xDC, 0x70, 0x74, 0x48, 0x3B, 0x0D, 0xED, 0x9F, 0xD3
};
static const uint8_t devicekey_seed[0x10] = {
0x4F, 0x02, 0x5F, 0x0E, 0xB6, 0x6D, 0x11, 0x0E, 0xDC, 0x32, 0x7D, 0x41, 0x86, 0xC2, 0xF4, 0x78
};
static const uint8_t devicekey_4x_seed[0x10] = {
0x0C, 0x91, 0x09, 0xDB, 0x93, 0x93, 0x07, 0x81, 0x07, 0x3C, 0xC4, 0x16, 0x22, 0x7C, 0x6C, 0x28
};
static const uint8_t masterkey_seed[0x10] = {
0xD8, 0xA2, 0x41, 0x0A, 0xC6, 0xC5, 0x90, 0x01, 0xC6, 0x1D, 0x6A, 0x26, 0x7C, 0x51, 0x3F, 0x3C
};
static const uint8_t devicekek_4x_seed[0x10] = {
0x2D, 0xC1, 0xF4, 0x8D, 0xF3, 0x5B, 0x69, 0x33, 0x42, 0x10, 0xAC, 0x65, 0xDA, 0x90, 0x46, 0x66
};
static void derive_new_device_keys(unsigned int keygen_keyslot) {
uint8_t work_buffer[0x10];
bool is_retail = configitem_is_retail();
for (unsigned int revision = 0; revision < MASTERKEY_NUM_NEW_DEVICE_KEYS; revision++) {
se_aes_ecb_decrypt_block(keygen_keyslot, work_buffer, 0x10, new_device_key_sources[revision], 0x10);
decrypt_data_into_keyslot(KEYSLOT_SWITCH_TEMPKEY, mkey_get_keyslot(0), is_retail ? new_device_keygen_sources[revision] : new_device_keygen_sources_dev[revision], 0x10);
if (revision < MASTERKEY_NUM_NEW_DEVICE_KEYS - 1) {
se_aes_ecb_decrypt_block(KEYSLOT_SWITCH_TEMPKEY, work_buffer, 0x10, work_buffer, 0x10);
set_old_devkey(revision + MASTERKEY_REVISION_400_410, work_buffer);
} else {
decrypt_data_into_keyslot(KEYSLOT_SWITCH_DEVICEKEY, KEYSLOT_SWITCH_TEMPKEY, work_buffer, 0x10);
}
}
set_aes_keyslot_flags(KEYSLOT_SWITCH_DEVICEKEY, 0xFF);
clear_aes_keyslot(keygen_keyslot);
}
/* Hardware init, sets up the RNG and SESSION keyslots, derives new DEVICE key. */
static void setup_se(void) {
uint8_t work_buffer[0x10];
/* Sanity check the Security Engine. */
se_verify_flags_cleared();
/* Initialize interrupts. */
intr_initialize_gic_nonsecure();
/* Perform some sanity initialization. */
volatile tegra_se_t *se = se_get_regs();
se->_0x0 &= 0xFFFEFFFF; /* Clear bit 16. */
(void)(se->FLAGS_REG);
__dsb_sy();
se->_0x4 = 0;
se->AES_KEY_READ_DISABLE_REG = 0;
se->RSA_KEY_READ_DISABLE_REG = 0;
se->_0x0 &= 0xFFFFFFFB;
/* Currently unknown what each flag does. */
for (unsigned int i = 0; i < KEYSLOT_AES_MAX; i++) {
set_aes_keyslot_flags(i, 0x15);
}
for (unsigned int i = 4; i < KEYSLOT_AES_MAX; i++) {
set_aes_keyslot_flags(i, 0x40);
}
for (unsigned int i = 0; i < KEYSLOT_RSA_MAX; i++) {
set_rsa_keyslot_flags(i, 0x41);
}
if (exosphere_get_target_firmware() >= ATMOSPHERE_TARGET_FIRMWARE_620 && exosphere_should_perform_620_keygen()) {
unsigned int master_kek_source_ind;
switch (exosphere_get_target_firmware()) {
case ATMOSPHERE_TARGET_FIRMWARE_620:
master_kek_source_ind = MASTERKEY_REVISION_620 - MASTERKEY_REVISION_620;
break;
case ATMOSPHERE_TARGET_FIRMWARE_700:
master_kek_source_ind = MASTERKEY_REVISION_700_CURRENT - MASTERKEY_REVISION_620;
break;
default:
generic_panic();
break;
}
/* Start by generating device keys. */
se_aes_ecb_decrypt_block(KEYSLOT_SWITCH_6XTSECKEY, work_buffer, 0x10, keyblob_key_seed_00, 0x10);
decrypt_data_into_keyslot(KEYSLOT_SWITCH_4XOLDDEVICEKEY, KEYSLOT_SWITCH_6XSBK, work_buffer, 0x10);
decrypt_data_into_keyslot(KEYSLOT_SWITCH_4XNEWCONSOLEKEYGENKEY, KEYSLOT_SWITCH_4XOLDDEVICEKEY, devicekey_4x_seed, 0x10);
decrypt_data_into_keyslot(KEYSLOT_SWITCH_4XOLDDEVICEKEY, KEYSLOT_SWITCH_4XOLDDEVICEKEY, devicekey_seed, 0x10);
/* Next, generate the master kek, and from there master key/device kek. We use different keyslots than Nintendo, here. */
decrypt_data_into_keyslot(KEYSLOT_SWITCH_6XTSECROOTKEY, KEYSLOT_SWITCH_6XTSECROOTKEY, new_master_kek_sources[master_kek_source_ind], 0x10);
decrypt_data_into_keyslot(KEYSLOT_SWITCH_MASTERKEY, KEYSLOT_SWITCH_6XTSECROOTKEY, masterkey_seed, 0x10);
decrypt_data_into_keyslot(KEYSLOT_SWITCH_5XNEWDEVICEKEYGENKEY, KEYSLOT_SWITCH_6XTSECROOTKEY, devicekek_4x_seed, 0x10);
clear_aes_keyslot(KEYSLOT_SWITCH_6XTSECROOTKEY);
}
/* Detect Master Key revision. */
mkey_detect_revision();
/* Derive new device keys. */
switch (exosphere_get_target_firmware()) {
case ATMOSPHERE_TARGET_FIRMWARE_100:
case ATMOSPHERE_TARGET_FIRMWARE_200:
case ATMOSPHERE_TARGET_FIRMWARE_300:
break;
case ATMOSPHERE_TARGET_FIRMWARE_400:
derive_new_device_keys(KEYSLOT_SWITCH_4XNEWDEVICEKEYGENKEY);
break;
case ATMOSPHERE_TARGET_FIRMWARE_500:
case ATMOSPHERE_TARGET_FIRMWARE_600:
case ATMOSPHERE_TARGET_FIRMWARE_620:
case ATMOSPHERE_TARGET_FIRMWARE_700:
derive_new_device_keys(KEYSLOT_SWITCH_5XNEWDEVICEKEYGENKEY);
break;
}
se_initialize_rng(KEYSLOT_SWITCH_DEVICEKEY);
/* Generate random data, transform with device key to get RNG key. */
se_generate_random(KEYSLOT_SWITCH_DEVICEKEY, work_buffer, 0x10);
decrypt_data_into_keyslot(KEYSLOT_SWITCH_RNGKEY, KEYSLOT_SWITCH_DEVICEKEY, work_buffer, 0x10);
set_aes_keyslot_flags(KEYSLOT_SWITCH_RNGKEY, 0xFF);
/* Repeat for Session key. */
se_generate_random(KEYSLOT_SWITCH_DEVICEKEY, work_buffer, 0x10);
decrypt_data_into_keyslot(KEYSLOT_SWITCH_SESSIONKEY, KEYSLOT_SWITCH_DEVICEKEY, work_buffer, 0x10);
set_aes_keyslot_flags(KEYSLOT_SWITCH_SESSIONKEY, 0xFF);
/* Generate test vector for our keys. */
se_generate_stored_vector();
}
static void setup_boot_config(void) {
/* Load boot config only if dev unit. */
if (configitem_is_retail()) {
bootconfig_clear();
} else {
void *bootconfig_ptr = NX_BOOTLOADER_BOOTCONFIG_POINTER;
if (exosphere_get_target_firmware() >= ATMOSPHERE_TARGET_FIRMWARE_600) {
bootconfig_ptr = NX_BOOTLOADER_BOOTCONFIG_POINTER_6X;
}
flush_dcache_range((uint8_t *)bootconfig_ptr, (uint8_t *)bootconfig_ptr + sizeof(bootconfig_t));
bootconfig_load_and_verify((bootconfig_t *)bootconfig_ptr);
}
}
static void package2_crypt_ctr(unsigned int master_key_rev, void *dst, size_t dst_size, const void *src, size_t src_size, const void *ctr, size_t ctr_size) {
/* Derive package2 key. */
static const uint8_t package2_key_source[0x10] = {0xFB, 0x8B, 0x6A, 0x9C, 0x79, 0x00, 0xC8, 0x49, 0xEF, 0xD2, 0x4D, 0x85, 0x4D, 0x30, 0xA0, 0xC7};
flush_dcache_range((uint8_t *)dst, (uint8_t *)dst + dst_size);
flush_dcache_range((uint8_t *)src, (uint8_t *)src + src_size);
unsigned int keyslot = mkey_get_keyslot(master_key_rev);
decrypt_data_into_keyslot(KEYSLOT_SWITCH_PACKAGE2KEY, keyslot, package2_key_source, 0x10);
/* Perform Encryption. */
se_aes_ctr_crypt(KEYSLOT_SWITCH_PACKAGE2KEY, dst, dst_size, src, src_size, ctr, ctr_size);
}
static void verify_header_signature(package2_header_t *header) {
const uint8_t *modulus;
if (configitem_is_retail()) {
static const uint8_t package2_modulus_retail[0x100] = {
0x8D, 0x13, 0xA7, 0x77, 0x6A, 0xE5, 0xDC, 0xC0, 0x3B, 0x25, 0xD0, 0x58, 0xE4, 0x20, 0x69, 0x59,
0x55, 0x4B, 0xAB, 0x70, 0x40, 0x08, 0x28, 0x07, 0xA8, 0xA7, 0xFD, 0x0F, 0x31, 0x2E, 0x11, 0xFE,
0x47, 0xA0, 0xF9, 0x9D, 0xDF, 0x80, 0xDB, 0x86, 0x5A, 0x27, 0x89, 0xCD, 0x97, 0x6C, 0x85, 0xC5,
0x6C, 0x39, 0x7F, 0x41, 0xF2, 0xFF, 0x24, 0x20, 0xC3, 0x95, 0xA6, 0xF7, 0x9D, 0x4A, 0x45, 0x74,
0x8B, 0x5D, 0x28, 0x8A, 0xC6, 0x99, 0x35, 0x68, 0x85, 0xA5, 0x64, 0x32, 0x80, 0x9F, 0xD3, 0x48,
0x39, 0xA2, 0x1D, 0x24, 0x67, 0x69, 0xDF, 0x75, 0xAC, 0x12, 0xB5, 0xBD, 0xC3, 0x29, 0x90, 0xBE,
0x37, 0xE4, 0xA0, 0x80, 0x9A, 0xBE, 0x36, 0xBF, 0x1F, 0x2C, 0xAB, 0x2B, 0xAD, 0xF5, 0x97, 0x32,
0x9A, 0x42, 0x9D, 0x09, 0x8B, 0x08, 0xF0, 0x63, 0x47, 0xA3, 0xE9, 0x1B, 0x36, 0xD8, 0x2D, 0x8A,
0xD7, 0xE1, 0x54, 0x11, 0x95, 0xE4, 0x45, 0x88, 0x69, 0x8A, 0x2B, 0x35, 0xCE, 0xD0, 0xA5, 0x0B,
0xD5, 0x5D, 0xAC, 0xDB, 0xAF, 0x11, 0x4D, 0xCA, 0xB8, 0x1E, 0xE7, 0x01, 0x9E, 0xF4, 0x46, 0xA3,
0x8A, 0x94, 0x6D, 0x76, 0xBD, 0x8A, 0xC8, 0x3B, 0xD2, 0x31, 0x58, 0x0C, 0x79, 0xA8, 0x26, 0xE9,
0xD1, 0x79, 0x9C, 0xCB, 0xD4, 0x2B, 0x6A, 0x4F, 0xC6, 0xCC, 0xCF, 0x90, 0xA7, 0xB9, 0x98, 0x47,
0xFD, 0xFA, 0x4C, 0x6C, 0x6F, 0x81, 0x87, 0x3B, 0xCA, 0xB8, 0x50, 0xF6, 0x3E, 0x39, 0x5D, 0x4D,
0x97, 0x3F, 0x0F, 0x35, 0x39, 0x53, 0xFB, 0xFA, 0xCD, 0xAB, 0xA8, 0x7A, 0x62, 0x9A, 0x3F, 0xF2,
0x09, 0x27, 0x96, 0x3F, 0x07, 0x9A, 0x91, 0xF7, 0x16, 0xBF, 0xC6, 0x3A, 0x82, 0x5A, 0x4B, 0xCF,
0x49, 0x50, 0x95, 0x8C, 0x55, 0x80, 0x7E, 0x39, 0xB1, 0x48, 0x05, 0x1E, 0x21, 0xC7, 0x24, 0x4F
};
modulus = package2_modulus_retail;
} else {
static const uint8_t package2_modulus_dev[0x100] = {
0xB3, 0x65, 0x54, 0xFB, 0x0A, 0xB0, 0x1E, 0x85, 0xA7, 0xF6, 0xCF, 0x91, 0x8E, 0xBA, 0x96, 0x99,
0x0D, 0x8B, 0x91, 0x69, 0x2A, 0xEE, 0x01, 0x20, 0x4F, 0x34, 0x5C, 0x2C, 0x4F, 0x4E, 0x37, 0xC7,
0xF1, 0x0B, 0xD4, 0xCD, 0xA1, 0x7F, 0x93, 0xF1, 0x33, 0x59, 0xCE, 0xB1, 0xE9, 0xDD, 0x26, 0xE6,
0xF3, 0xBB, 0x77, 0x87, 0x46, 0x7A, 0xD6, 0x4E, 0x47, 0x4A, 0xD1, 0x41, 0xB7, 0x79, 0x4A, 0x38,
0x06, 0x6E, 0xCF, 0x61, 0x8F, 0xCD, 0xC1, 0x40, 0x0B, 0xFA, 0x26, 0xDC, 0xC0, 0x34, 0x51, 0x83,
0xD9, 0x3B, 0x11, 0x54, 0x3B, 0x96, 0x27, 0x32, 0x9A, 0x95, 0xBE, 0x1E, 0x68, 0x11, 0x50, 0xA0,
0x6B, 0x10, 0xA8, 0x83, 0x8B, 0xF5, 0xFC, 0xBC, 0x90, 0x84, 0x7A, 0x5A, 0x5C, 0x43, 0x52, 0xE6,
0xC8, 0x26, 0xE9, 0xFE, 0x06, 0xA0, 0x8B, 0x53, 0x0F, 0xAF, 0x1E, 0xC4, 0x1C, 0x0B, 0xCF, 0x50,
0x1A, 0xA4, 0xF3, 0x5C, 0xFB, 0xF0, 0x97, 0xE4, 0xDE, 0x32, 0x0A, 0x9F, 0xE3, 0x5A, 0xAA, 0xB7,
0x44, 0x7F, 0x5C, 0x33, 0x60, 0xB9, 0x0F, 0x22, 0x2D, 0x33, 0x2A, 0xE9, 0x69, 0x79, 0x31, 0x42,
0x8F, 0xE4, 0x3A, 0x13, 0x8B, 0xE7, 0x26, 0xBD, 0x08, 0x87, 0x6C, 0xA6, 0xF2, 0x73, 0xF6, 0x8E,
0xA7, 0xF2, 0xFE, 0xFB, 0x6C, 0x28, 0x66, 0x0D, 0xBD, 0xD7, 0xEB, 0x42, 0xA8, 0x78, 0xE6, 0xB8,
0x6B, 0xAE, 0xC7, 0xA9, 0xE2, 0x40, 0x6E, 0x89, 0x20, 0x82, 0x25, 0x8E, 0x3C, 0x6A, 0x60, 0xD7,
0xF3, 0x56, 0x8E, 0xEC, 0x8D, 0x51, 0x8A, 0x63, 0x3C, 0x04, 0x78, 0x23, 0x0E, 0x90, 0x0C, 0xB4,
0xE7, 0x86, 0x3B, 0x4F, 0x8E, 0x13, 0x09, 0x47, 0x32, 0x0E, 0x04, 0xB8, 0x4D, 0x5B, 0xB0, 0x46,
0x71, 0xB0, 0x5C, 0xF4, 0xAD, 0x63, 0x4F, 0xC5, 0xE2, 0xAC, 0x1E, 0xC4, 0x33, 0x96, 0x09, 0x7B
};
modulus = package2_modulus_dev;
}
/* This is normally only allowed on dev units, but we'll allow it anywhere. */
bool is_unsigned = EXOSPHERE_LOOSEN_PACKAGE2_RESTRICTIONS_FOR_DEBUG || bootconfig_is_package2_unsigned();
if (!is_unsigned && se_rsa2048_pss_verify(header->signature, 0x100, modulus, 0x100, header->encrypted_header, 0x100) == 0) {
panic(0xF0000001); /* Invalid PK21 signature. */
}
}
static uint32_t get_package2_size(package2_meta_t *metadata) {
return metadata->ctr_dwords[0] ^ metadata->ctr_dwords[2] ^ metadata->ctr_dwords[3];
}
static bool validate_package2_metadata(package2_meta_t *metadata) {
if (metadata->magic != MAGIC_PK21) {
return false;
}
/* Package2 size, version number is stored XORed in header CTR. */
/* Nintendo, what the fuck? */
uint32_t package_size = metadata->ctr_dwords[0] ^ metadata->ctr_dwords[2] ^ metadata->ctr_dwords[3];
uint8_t header_version = (uint8_t)((metadata->ctr_dwords[1] ^ (metadata->ctr_dwords[1] >> 16) ^ (metadata->ctr_dwords[1] >> 24)) & 0xFF);
/* Ensure package isn't too big or too small. */
if (package_size <= sizeof(package2_header_t) || package_size > PACKAGE2_SIZE_MAX) {
return false;
}
/* Validate that we're working with a header we know how to handle. */
if (header_version > MASTERKEY_REVISION_MAX) {
return false;
}
/* Require aligned entrypoint. */
if (metadata->entrypoint & 3) {
return false;
}
/* Validate section size sanity. */
if (metadata->section_sizes[0] + metadata->section_sizes[1] + metadata->section_sizes[2] + sizeof(package2_header_t) != package_size) {
return false;
}
bool entrypoint_found = false;
/* Header has space for 4 sections, but only 3 are validated/potentially loaded on hardware. */
size_t cur_section_offset = 0;
for (unsigned int section = 0; section < PACKAGE2_SECTION_MAX; section++) {
/* Validate section size alignment. */
if (metadata->section_sizes[section] & 3) {
return false;
}
/* Validate section does not overflow. */
if (check_32bit_additive_overflow(metadata->section_offsets[section], metadata->section_sizes[section])) {
return false;
}
/* Check for entrypoint presence. */
uint32_t section_end = metadata->section_offsets[section] + metadata->section_sizes[section];
if (metadata->section_offsets[section] <= metadata->entrypoint && metadata->entrypoint < section_end) {
entrypoint_found = true;
}
/* Ensure no overlap with later sections. */
for (unsigned int later_section = section + 1; later_section < PACKAGE2_SECTION_MAX; later_section++) {
uint32_t later_section_end = metadata->section_offsets[later_section] + metadata->section_sizes[later_section];
if (overlaps(metadata->section_offsets[section], section_end, metadata->section_offsets[later_section], later_section_end)) {
return false;
}
}
bool check_hash = EXOSPHERE_LOOSEN_PACKAGE2_RESTRICTIONS_FOR_DEBUG == 0;
/* Validate section hashes. */
if (metadata->section_sizes[section]) {
void *section_data = (void *)((uint8_t *)NX_BOOTLOADER_PACKAGE2_LOAD_ADDRESS + sizeof(package2_header_t) + cur_section_offset);
uint8_t calculated_hash[0x20];
flush_dcache_range((uint8_t *)section_data, (uint8_t *)section_data + metadata->section_sizes[section]);
se_calculate_sha256(calculated_hash, section_data, metadata->section_sizes[section]);
if (check_hash && memcmp(calculated_hash, metadata->section_hashes[section], sizeof(metadata->section_hashes[section])) != 0) {
return false;
}
cur_section_offset += metadata->section_sizes[section];
}
}
/* Ensure that entrypoint is present in one of our sections. */
if (!entrypoint_found) {
return false;
}
/* Perform version checks. */
/* We will be compatible with all package2s released before current, but not newer ones. */
if (metadata->version_max >= PACKAGE2_MINVER_THEORETICAL && metadata->version_min < PACKAGE2_MAXVER_700_CURRENT) {
return true;
}
return false;
}
/* Decrypts package2 header, and returns the master key revision required. */
static uint32_t decrypt_and_validate_header(package2_header_t *header) {
package2_meta_t metadata;
if (bootconfig_is_package2_plaintext() == 0) {
uint32_t mkey_rev;
/* Try to decrypt for all possible master keys. */
for (mkey_rev = 0; mkey_rev <= mkey_get_revision(); mkey_rev++) {
package2_crypt_ctr(mkey_rev, &metadata, sizeof(package2_meta_t), &header->metadata, sizeof(package2_meta_t), header->metadata.ctr, sizeof(header->metadata.ctr));
/* Copy the ctr (which stores information) into the decrypted metadata. */
memcpy(metadata.ctr, header->metadata.ctr, sizeof(header->metadata.ctr));
/* See if this is the correct key. */
if (validate_package2_metadata(&metadata)) {
header->metadata = metadata;
return mkey_rev;
}
}
/* Ensure we successfully decrypted the header. */
if (mkey_rev > mkey_get_revision()) {
panic(0xFAF00003);
}
} else if (!validate_package2_metadata(&header->metadata)) {
panic(0xFAF0003);
}
return 0;
}
static void load_package2_sections(package2_meta_t *metadata, uint32_t master_key_rev) {
/* By default, copy data directly from where NX_BOOTLOADER puts it. */
void *load_buf = NX_BOOTLOADER_PACKAGE2_LOAD_ADDRESS;
/* Check whether any of our sections overlap this region. If they do, we must relocate and copy from elsewhere. */
bool needs_relocation = false;
for (unsigned int section = 0; section < PACKAGE2_SECTION_MAX; section++) {
uint64_t section_start = DRAM_BASE_PHYSICAL + (uint64_t)metadata->section_offsets[section];
uint64_t section_end = section_start + (uint64_t)metadata->section_sizes[section];
if (overlaps(section_start, section_end, (uint64_t)(NX_BOOTLOADER_PACKAGE2_LOAD_ADDRESS), (uint64_t)(NX_BOOTLOADER_PACKAGE2_LOAD_ADDRESS) + PACKAGE2_SIZE_MAX)) {
needs_relocation = true;
}
}
if (needs_relocation) {
/* This code should *always* succeed in finding a carveout within seven loops, */
/* due to the section size limit, and section number limit. */
/* However, Nintendo tries panics after 8 loops if a safe section is not found. */
/* This should never be the case, mathematically. */
/* We will replicate this behavior. */
bool found_safe_carveout = false;
uint64_t potential_base_start = DRAM_BASE_PHYSICAL;
uint64_t potential_base_end = potential_base_start + PACKAGE2_SIZE_MAX;
for (unsigned int i = 0; i < 8; i++) {
int is_safe = 1;
for (unsigned int section = 0; section < PACKAGE2_SECTION_MAX; section++) {
uint64_t section_start = DRAM_BASE_PHYSICAL + (uint64_t)metadata->section_offsets[section];
uint64_t section_end = section_start + (uint64_t)metadata->section_sizes[section];
if (overlaps(section_start, section_end, potential_base_start, potential_base_end)) {
is_safe = 0;
}
}
found_safe_carveout |= is_safe;
if (found_safe_carveout) {
break;
}
potential_base_start += PACKAGE2_SIZE_MAX;
potential_base_end += PACKAGE2_SIZE_MAX;
}
if (!found_safe_carveout) {
generic_panic();
}
/* Relocate to new carveout. */
memcpy((void *)potential_base_start, load_buf, PACKAGE2_SIZE_MAX);
memset(load_buf, 0, PACKAGE2_SIZE_MAX);
load_buf = (void *)potential_base_start;
}
size_t cur_section_offset = 0;
/* Copy each section to its appropriate location, decrypting if necessary. */
for (unsigned int section = 0; section < PACKAGE2_SECTION_MAX; section++) {
if (metadata->section_sizes[section] == 0) {
continue;
}
void *dst_start = (void *)(DRAM_BASE_PHYSICAL + (uint64_t)metadata->section_offsets[section]);
void *src_start = load_buf + sizeof(package2_header_t) + cur_section_offset;
size_t size = (size_t)metadata->section_sizes[section];
if (bootconfig_is_package2_plaintext() && size != 0) {
memcpy(dst_start, src_start, size);
} else if (size != 0) {
package2_crypt_ctr(master_key_rev, dst_start, size, src_start, size, metadata->section_ctrs[section], 0x10);
}
cur_section_offset += size;
}
/* Clear the encrypted package2 from memory. */
memset(load_buf, 0, PACKAGE2_SIZE_MAX);
}
static void copy_warmboot_bin_to_dram() {
uint8_t *warmboot_src;
switch (exosphere_get_target_firmware()) {
case ATMOSPHERE_TARGET_FIRMWARE_100:
case ATMOSPHERE_TARGET_FIRMWARE_200:
case ATMOSPHERE_TARGET_FIRMWARE_300:
default:
generic_panic();
break;
case ATMOSPHERE_TARGET_FIRMWARE_400:
case ATMOSPHERE_TARGET_FIRMWARE_500:
warmboot_src = (uint8_t *)0x4003B000;
break;
case ATMOSPHERE_TARGET_FIRMWARE_600:
case ATMOSPHERE_TARGET_FIRMWARE_620:
warmboot_src = (uint8_t *)0x4003D800;
break;
case ATMOSPHERE_TARGET_FIRMWARE_700:
warmboot_src = (uint8_t *)0x4003E000;
break;
}
uint8_t *warmboot_dst = (uint8_t *)0x8000D000;
const size_t warmboot_size = 0x2000;
/* Flush cache, to ensure warmboot is where we need it to be. */
flush_dcache_range(warmboot_src, warmboot_src + warmboot_size);
__dsb_sy();
/* Copy warmboot. */
for (size_t i = 0; i < warmboot_size; i += sizeof(uint32_t)) {
write32le(warmboot_dst, i, read32le(warmboot_src, i));
}
/* Flush cache, to ensure warmboot is where we need it to be. */
flush_dcache_range(warmboot_dst, warmboot_dst + warmboot_size);
__dsb_sy();
}
static void sync_with_nx_bootloader(int state) {
while (MAILBOX_NX_BOOTLOADER_SETUP_STATE(exosphere_get_target_firmware()) < state) {
wait(100);
}
}
static void identity_unmap_dram(void) {
uintptr_t *mmu_l1_tbl = (uintptr_t *)(TZRAM_GET_SEGMENT_ADDRESS(TZRAM_SEGEMENT_ID_SECMON_EVT) + 0x800 - 64);
mmu_unmap_range(1, mmu_l1_tbl, IDENTITY_GET_MAPPING_ADDRESS(IDENTITY_MAPPING_DRAM), IDENTITY_GET_MAPPING_SIZE(IDENTITY_MAPPING_DRAM));
tlb_invalidate_all_inner_shareable();
}
uintptr_t get_pk2ldr_stack_address(void) {
return TZRAM_GET_SEGMENT_ADDRESS(TZRAM_SEGMENT_ID_PK2LDR) + 0x2000;
}
/* This function is called during coldboot init, and validates a package2. */
/* This package2 is read into memory by a concurrent BPMP bootloader. */
void load_package2(coldboot_crt0_reloc_list_t *reloc_list) {
/* Load Exosphere-specific config. */
exosphere_load_config();
configitem_set_debugmode_override(exosphere_should_override_debugmode_user() != 0, exosphere_should_override_debugmode_priv() != 0);
/* Setup the Security Engine. */
setup_se();
/* Perform initial PMC register writes, if relevant. */
if (exosphere_get_target_firmware() >= ATMOSPHERE_TARGET_FIRMWARE_400) {
MAKE_REG32(PMC_BASE + 0x054) = 0x8000D000;
MAKE_REG32(PMC_BASE + 0x0A0) &= 0xFFF3FFFF;
MAKE_REG32(PMC_BASE + 0x818) &= 0xFFFFFFFE;
MAKE_REG32(PMC_BASE + 0x334) |= 0x10;
switch (exosphere_get_target_firmware()) {
case ATMOSPHERE_TARGET_FIRMWARE_400:
MAKE_REG32(PMC_BASE + 0x360) = 0x105;
break;
case ATMOSPHERE_TARGET_FIRMWARE_500:
MAKE_REG32(PMC_BASE + 0x360) = 6;
break;
case ATMOSPHERE_TARGET_FIRMWARE_600:
MAKE_REG32(PMC_BASE + 0x360) = 0x87;
break;
case ATMOSPHERE_TARGET_FIRMWARE_620:
MAKE_REG32(PMC_BASE + 0x360) = 0xA8;
break;
case ATMOSPHERE_TARGET_FIRMWARE_700:
MAKE_REG32(PMC_BASE + 0x360) = 0x129;
break;
}
}
wait(1000);
bootup_misc_mmio();
setup_current_core_state();
/* Save boot reason to global. */
bootconfig_load_boot_reason((volatile boot_reason_t *)(MAILBOX_NX_BOOTLOADER_BOOT_REASON(exosphere_get_target_firmware())));
/* Initialize cache'd random bytes for kernel. */
randomcache_init();
/* memclear the initial copy of Exosphere running in IRAM (relocated to TZRAM by earlier code). */
/* memset((void *)reloc_list->reloc_base, 0, reloc_list->loaded_bin_size); */
/* Let NX Bootloader know that we're running. */
MAILBOX_NX_BOOTLOADER_IS_SECMON_AWAKE(exosphere_get_target_firmware()) = 1;
/* Wait for 1 second, to allow time for NX_BOOTLOADER to draw to the screen. This is useful for debugging. */
/* wait(1000000); */
/* Synchronize with NX BOOTLOADER. */
sync_with_nx_bootloader(NX_BOOTLOADER_STATE_MOVED_BOOTCONFIG);
/* Load Boot Config into global. */
setup_boot_config();
/* Set sysctr0 registers based on bootconfig. */
if (exosphere_get_target_firmware() >= ATMOSPHERE_TARGET_FIRMWARE_400) {
uint64_t sysctr0_val = bootconfig_get_value_for_sysctr0();
MAKE_SYSCTR0_REG(0x8) = (uint32_t)((sysctr0_val >> 0) & 0xFFFFFFFFULL);
MAKE_SYSCTR0_REG(0xC) = (uint32_t)((sysctr0_val >> 32) & 0xFFFFFFFFULL);
MAKE_SYSCTR0_REG(0x0) = 3;
}
/* Synchronize with NX BOOTLOADER. */
if (exosphere_get_target_firmware() >= ATMOSPHERE_TARGET_FIRMWARE_400) {
sync_with_nx_bootloader(NX_BOOTLOADER_STATE_DRAM_INITIALIZED_4X);
copy_warmboot_bin_to_dram();
if (exosphere_get_target_firmware() >= ATMOSPHERE_TARGET_FIRMWARE_600) {
setup_dram_magic_numbers();
}
sync_with_nx_bootloader(NX_BOOTLOADER_STATE_LOADED_PACKAGE2_4X);
} else {
sync_with_nx_bootloader(NX_BOOTLOADER_STATE_LOADED_PACKAGE2);
}
/* Make PMC (2.x+), MC (4.x+) registers secure-only */
secure_additional_devices();
/* Remove the identity mapping for iRAM-C+D & TZRAM */
/* For our crt0 to work, this doesn't actually unmap TZRAM */
identity_unmap_iram_cd_tzram();
/* Load header from NX_BOOTLOADER-initialized DRAM. */
package2_header_t header;
flush_dcache_range((uint8_t *)NX_BOOTLOADER_PACKAGE2_LOAD_ADDRESS, (uint8_t *)NX_BOOTLOADER_PACKAGE2_LOAD_ADDRESS + sizeof(header));
memcpy(&header, NX_BOOTLOADER_PACKAGE2_LOAD_ADDRESS, sizeof(header));
flush_dcache_range((uint8_t *)&header, (uint8_t *)&header + sizeof(header));
/* Perform signature checks. */
/* Special exosphere patching enable: All-zeroes signature + decrypted header implies unsigned and decrypted package2. */
if (header.signature[0] == 0 && memcmp(header.signature, header.signature + 1, sizeof(header.signature) - 1) == 0 && header.metadata.magic == MAGIC_PK21) {
bootconfig_set_package2_plaintext_and_unsigned();
}
verify_header_signature(&header);
/* Decrypt header, get key revision required. */
uint32_t package2_mkey_rev = decrypt_and_validate_header(&header);
/* Copy hash, if necessary. */
if (bootconfig_is_recovery_boot()) {
bootconfig_set_package2_hash_for_recovery(NX_BOOTLOADER_PACKAGE2_LOAD_ADDRESS, get_package2_size(&header.metadata));
}
/* Load Package2 Sections. */
load_package2_sections(&header.metadata, package2_mkey_rev);
/* Clean up cache. */
flush_dcache_all();
invalidate_icache_all(); /* non-broadcasting */
/* Set CORE0 entrypoint for Package2. */
set_core_entrypoint_and_argument(0, DRAM_BASE_PHYSICAL + header.metadata.entrypoint, 0);
/* Remove the DRAM identity mapping. */
if (0) {
identity_unmap_dram();
}
/* Synchronize with NX BOOTLOADER. */
if (exosphere_get_target_firmware() >= ATMOSPHERE_TARGET_FIRMWARE_400) {
sync_with_nx_bootloader(NX_BOOTLOADER_STATE_FINISHED_4X);
setup_4x_mmio();
} else {
sync_with_nx_bootloader(NX_BOOTLOADER_STATE_FINISHED);
}
/* Prepare the SMC API with version-dependent SMCs. */
set_version_specific_smcs();
/* Update SCR_EL3 depending on value in Bootconfig. */
set_extabt_serror_taken_to_el3(bootconfig_take_extabt_serror_to_el3());
}
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