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Atmosphere/fusee/fusee-secondary/src/nxboot.c

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#include <stdio.h>
#include <string.h>
#include <errno.h>
#include <stdlib.h>
#include <malloc.h>
#include "utils.h"
#include "fs_utils.h"
#include "nxboot.h"
#include "key_derivation.h"
#include "package1.h"
#include "package2.h"
#include "loader.h"
#include "splash_screen.h"
#include "exocfg.h"
#include "display/video_fb.h"
#include "lib/ini.h"
#include "hwinit/cluster.h"
static int exosphere_ini_handler(void *user, const char *section, const char *name, const char *value) {
exosphere_config_t *exo_cfg = (exosphere_config_t *)user;
if (strcmp(section, "exosphere") == 0) {
if (strcmp(name, EXOSPHERE_TARGETFW_KEY) == 0) {
sscanf(value, "%d", &exo_cfg->target_firmware);
} else {
return 0;
}
} else {
return 0;
}
return 1;
}
static void nxboot_configure_exosphere(void) {
exosphere_config_t exo_cfg = {0};
exo_cfg.magic = MAGIC_EXOSPHERE_BOOTCONFIG;
exo_cfg.target_firmware = EXOSPHERE_TARGET_FIRMWARE_MAX;
if (ini_parse_string(get_loader_ctx()->bct0, exosphere_ini_handler, &exo_cfg) < 0) {
printf("Error: Failed to parse BCT.ini!\n");
generic_panic();
}
if (exo_cfg.target_firmware < EXOSPHERE_TARGET_FIRMWARE_MIN || exo_cfg.target_firmware > EXOSPHERE_TARGET_FIRMWARE_MAX) {
printf("Error: Invalid Exosphere target firmware!\n");
generic_panic();
}
*(MAILBOX_EXOSPHERE_CONFIGURATION) = exo_cfg;
}
static void nxboot_adjust_exosphere_target_firmware(const package2_header_t *package2) {
static const uint32_t mkey_ver_to_target_fw[] = {
EXOSPHERE_TARGET_FIRMWARE_100,
EXOSPHERE_TARGET_FIRMWARE_200,
EXOSPHERE_TARGET_FIRMWARE_300,
EXOSPHERE_TARGET_FIRMWARE_300,
EXOSPHERE_TARGET_FIRMWARE_400,
EXOSPHERE_TARGET_FIRMWARE_500,
};
uint8_t package2_header_version = package2_meta_get_header_version(&package2->metadata);
if (MAILBOX_EXOSPHERE_CONFIGURATION->target_firmware == 0) {
if (package2_header_version >= 1 && package2_header_version <= sizeof(mkey_ver_to_target_fw)/4) {
MAILBOX_EXOSPHERE_CONFIGURATION->target_firmware = mkey_ver_to_target_fw[package2_header_version];
}
}
}
/* This is the main function responsible for booting Horizon. */
static nx_keyblob_t __attribute__((aligned(16))) g_keyblobs[32];
void nxboot_main(void) {
loader_ctx_t *loader_ctx = get_loader_ctx();
/* void *bootconfig; */
package2_header_t *package2;
size_t package2_size;
void *tsec_fw;
size_t tsec_fw_size;
void *warmboot_fw;
size_t warmboot_fw_size;
void *package1loader;
size_t package1loader_size ;
package1_header_t *package1;
size_t package1_size;
uint32_t available_revision;
FILE *boot0;
void *exosphere_memaddr;
/* TODO: How should we deal with bootconfig? */
package2 = memalign(4096, PACKAGE2_SIZE_MAX);
if (package2 == NULL) {
printf("Error: nxboot: out of memory!\n");
generic_panic();
}
/* Read Package2 from a file, otherwise from its partition(s). */
if (loader_ctx->package2_path[0] != '\0') {
package2_size = get_file_size(loader_ctx->package2_path);
if (package2_size == 0) {
printf("Error: Could not read Package2 from %s!\n", loader_ctx->package2_path);
generic_panic();
} else if (package2_size > PACKAGE2_SIZE_MAX || package2_size <= sizeof(package2_header_t)) {
printf("Error: Package2 from %s is too big or too small!\n", loader_ctx->package2_path);
generic_panic();
}
if (read_from_file(package2, package2_size, loader_ctx->package2_path) != package2_size) {
printf("Error: Could not read Package2 from %s!\n", loader_ctx->package2_path);
generic_panic();
}
if (package2_meta_get_size(&package2->metadata) < package2_size) {
printf("Error: Package2 from %s is too small!\n", loader_ctx->package2_path);
generic_panic();
}
} else {
#ifdef I_KNOW_WHAT_IM_DOING_2
FILE *bcpkg21 = fopen("bcpkg21:/", "rb");
if (bcpkg21 == NULL || fseek(bcpkg21, 0x4000, SEEK_SET) != 0) {
printf("Error: Failed to read Package2 from NAND!\n");
generic_panic();
}
if (fread(package2, sizeof(package2_header_t), 1, bcpkg21) < 1) {
printf("Error: Failed to read Package2 from NAND!\n");
generic_panic();
}
package2_size = package2_meta_get_size(&package2->metadata);
if (package2_size > PACKAGE2_SIZE_MAX || package2_size <= sizeof(package2_header_t)) {
printf("Error: Package2 from NAND is too big or too small!\n");
generic_panic();
}
if (fread(package2->data, package2_size - sizeof(package2_header_t), 1, bcpkg21) < 1) {
printf("Error: Failed to read Package2 from NAND!\n");
generic_panic();
}
fclose(bcpkg21);
#else
printf("Error: Package2 must be loaded from the SD card, unless you know what you are doing!\n");
generic_panic();
#endif
}
/* Setup boot configuration for Exosphère. */
nxboot_configure_exosphere();
nxboot_adjust_exosphere_target_firmware(package2);
if (MAILBOX_EXOSPHERE_CONFIGURATION->target_firmware == 0) {
printf("Error: Failed to determine which target firmware too use!\n");
generic_panic();
}
boot0 = fopen("boot0:/", "rb");
if (boot0 == NULL || package1_read_and_parse_boot0(&package1loader, &package1loader_size, g_keyblobs, &available_revision, boot0) == -1) {
printf("Error: Couldn't parse boot0: %s!\n", strerror(errno));
generic_panic();
}
fclose(boot0);
/* Read the TSEC firmware from a file, otherwise from PK1L. */
if (loader_ctx->tsecfw_path[0] != '\0') {
tsec_fw_size = get_file_size(loader_ctx->tsecfw_path);
if (tsec_fw_size != 0 && tsec_fw_size != 0xF00) {
printf("Error: TSEC firmware from %s has a wrong size!\n", loader_ctx->tsecfw_path);
generic_panic();
} else if (tsec_fw_size == 0) {
printf("Error: Could not read the TSEC firmware from %s!\n", loader_ctx->tsecfw_path);
generic_panic();
}
tsec_fw = memalign(0x100, tsec_fw_size);
if (tsec_fw == NULL) {
printf("Error: nxboot_main: out of memory!\n");
generic_panic();
}
if (read_from_file(tsec_fw, tsec_fw_size, loader_ctx->tsecfw_path) != tsec_fw_size) {
printf("Error: Could not read the TSEC firmware from %s!\n", loader_ctx->tsecfw_path);
generic_panic();
}
} else {
tsec_fw_size = package1_get_tsec_fw(&tsec_fw, package1loader, package1loader_size);
if (tsec_fw_size == 0) {
printf("Error: Failed to read the TSEC firmware from Package1loader!\n");
generic_panic();
}
}
/* TODO: Validate that we're capable of booting. */
/* TODO: Initialize Boot Reason. */
/* Derive keydata. */
if (derive_nx_keydata(MAILBOX_EXOSPHERE_CONFIGURATION->target_firmware, g_keyblobs, available_revision, tsec_fw, tsec_fw_size) != 0) {
printf("Error: Key derivation failed!\n");
generic_panic();
}
/* Read the warmboot firmware from a file, otherwise from PK1. */
if (loader_ctx->warmboot_path[0] != '\0') {
warmboot_fw_size = get_file_size(loader_ctx->warmboot_path);
if (warmboot_fw_size == 0) {
printf("Error: Could not read the warmboot firmware from %s!\n", loader_ctx->warmboot_path);
generic_panic();
}
warmboot_fw = malloc(warmboot_fw_size);
if (warmboot_fw == NULL) {
printf("Error: nxboot_main: out of memory!\n");
generic_panic();
}
if (read_from_file(warmboot_fw, warmboot_fw_size, loader_ctx->warmboot_path) != warmboot_fw_size) {
printf("Error: Could not read the warmboot firmware from %s!\n", loader_ctx->warmboot_path);
generic_panic();
}
} else {
uint8_t ctr[16];
package1_size = package1_get_encrypted_package1(&package1, ctr, package1loader, package1loader_size);
if(package1_decrypt(package1, package1_size, ctr)) {
warmboot_fw = package1_get_warmboot_fw(package1);
warmboot_fw_size = package1->warmboot_size;
} else {
warmboot_fw = NULL;
warmboot_fw_size = 0;
}
if (warmboot_fw_size == 0) {
printf("Error: Could not read the warmboot firmware from Package1!\n");
generic_panic();
}
}
/* Patch package2, adding Thermosphère + custom KIPs. */
package2_rebuild_and_copy(package2, MAILBOX_EXOSPHERE_CONFIGURATION->target_firmware);
/* Copy Exophère to a good location (or read it directly to it.) */
if (MAILBOX_EXOSPHERE_CONFIGURATION->target_firmware <= EXOSPHERE_TARGET_FIRMWARE_400) {
exosphere_memaddr = (void *)0x40020000;
} else {
exosphere_memaddr = (void *)0x40018000; /* 5.x has its secmon's crt0 around this region. */
}
if (loader_ctx->exosphere_path[0] != '\0') {
size_t exosphere_size = get_file_size(loader_ctx->exosphere_path);
if (exosphere_size == 0) {
printf(u8"Error: Could not read Exosphère from %s!\n", loader_ctx->exosphere_path);
generic_panic();
} else if (exosphere_size > 0x10000) {
/* The maximum is actually a bit less than that. */
printf(u8"Error: Exosphère from %s is too big!\n", loader_ctx->exosphere_path);
generic_panic();
}
if (read_from_file(exosphere_memaddr, exosphere_size, loader_ctx->exosphere_path) != exosphere_size) {
printf(u8"Error: Could not read Exosphère from %s!\n", loader_ctx->exosphere_path);
generic_panic();
}
} else {
extern const uint8_t exosphere_bin[];
extern const uint32_t exosphere_bin_size;
memcpy(exosphere_memaddr, exosphere_bin, exosphere_bin_size);
}
/* Boot up Exosphère. */
MAILBOX_NX_BOOTLOADER_IS_SECMON_AWAKE = 0;
if (MAILBOX_EXOSPHERE_CONFIGURATION->target_firmware < EXOSPHERE_TARGET_FIRMWARE_400) {
MAILBOX_NX_BOOTLOADER_SETUP_STATE = NX_BOOTLOADER_STATE_LOADED_PACKAGE2;
} else {
MAILBOX_NX_BOOTLOADER_SETUP_STATE = NX_BOOTLOADER_STATE_LOADED_PACKAGE2_4X;
}
cluster_enable_cpu0((uint64_t)(uintptr_t)exosphere_memaddr, 1);
while (MAILBOX_NX_BOOTLOADER_IS_SECMON_AWAKE == 0) {
/* Wait for Exosphere to wake up. */
}
if (MAILBOX_EXOSPHERE_CONFIGURATION->target_firmware < EXOSPHERE_TARGET_FIRMWARE_400) {
MAILBOX_NX_BOOTLOADER_SETUP_STATE = NX_BOOTLOADER_STATE_FINISHED;
} else {
MAILBOX_NX_BOOTLOADER_SETUP_STATE = NX_BOOTLOADER_STATE_FINISHED_4X;
}
/* Clean up. */
free(package1loader);
if (loader_ctx->tsecfw_path[0] != '\0') {
free(tsec_fw);
}
if (loader_ctx->warmboot_path[0] != '\0') {
free(warmboot_fw);
}
free(package2);
/* Display splash screen. */
display_splash_screen_bmp(loader_ctx->custom_splash_path);
/* TODO: Halt ourselves. */
}
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