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x8A4.c
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//
// Created by cryptic on 4/14/24.
//
/**
* @file x8A4.c
* @author Cryptiiiic
* @brief This file is for all x8A4 library related code.
* @version 1.0.1
* @date 2024-04-14
*
* @copyright Copyright (c) 2024
*/
/* Include headers */
#include <x8A4/Logger/logger.h>
#include <x8A4/Kernel/osobject.h>
#include <x8A4/Kernel/nvram.h>
#include <x8A4/x8A4.h>
#include <x8A4/Kernel/kpf.h>
#include <libkrw.h>
/* Cached Variables */
int init_done = 0;
struct x8A4_nonce_domain *domains_cached = NULL;
struct x8A4_nonce_slot *slots_cached = NULL;
int nonce_slot_format_cached = -1;
int domains_count_cached = -1;
int cryptex_domains_index_cached = -1;
int cryptex_slots_index_cached = -1;
int cryptex_index_cached = -1;
int verbose_cached = 0;
uint64_t *gc_cached = NULL;
int gc_count_cached = 0;
uint64_t *gc_d_cached = NULL;
int gc_d_count_cached = 0;
/* Functions */
/**
* @brief x8A4 constructor
*/
__attribute__((constructor, used)) void x8A4_constructor(void) {
x8A4_log_debug("ctor!\n", "");
}
/**
* @brief x8A4 destructor
*/
__attribute__((destructor, used)) void x8A4_destructor(void) {
x8A4_log_debug("dtor!\n", "");
x8A4_free();
}
/**
* @brief x8A4 init function
* @return Zero on success
*/
int x8A4_init(void) {
if (geteuid() != 0) {
x8A4_log_error("x8A4 Requires running with sudo!\n", "");
return -1;
}
if(init_done) {
return 0;
}
x8A4_log_debug("init!\n", "");
if (xpf_init()) {
return -1;
}
uint64_t slide = get_slide();
if (slide == 0) {
return -1;
}
if (tfp0_init()) {
return -1;
}
if (offsets_init()) {
return -1;
}
gc_cached = calloc(1, 1024);
gc_d_cached = calloc(1, 1024);
init_done = 1;
return 0;
}
/**
* @brief x8A4 free function
*/
void x8A4_free(void) {
xpf_free_fileset_sections();
if (domains_cached) {
free(domains_cached);
}
if (apple_mobile_ap_nonce_service2_cached != IO_OBJECT_NULL) {
x8A4_log_debug("Closing apple_mobile_ap_nonce_service2_cached\n", "");
IOServiceClose(apple_mobile_ap_nonce_service2_cached);
}
if(apple_mobile_ap_nonce_service_cached != IO_OBJECT_NULL) {
x8A4_log_debug("Releasing apple_mobile_ap_nonce_service_cached\n", "");
IOObjectRelease(apple_mobile_ap_nonce_service_cached);
}
if(kernel_path_cached) {
free(kernel_path_cached);
}
if(koffsets_cached) {
free(koffsets_cached);
}
if(nvram_keys_cached) {
for(int i = 0; i < nvram_keys_count_cached; i++) {
if(nvram_keys_cached[i].key) {
int found = 0;
for(int j = 0; j < gc_d_count_cached; j++) {
if(gc_d_cached[j] == (uint64_t)nvram_keys_cached[i].key) {
found = 1;
break;
}
}
if(!found) {
free(nvram_keys_cached[i].key);
}
}
}
free(nvram_keys_cached);
}
if(gc_cached) {
for(int i = 0; i < gc_count_cached; i++) {
int found = 0;
for(int j = 0; j < gc_d_count_cached; j++) {
if(gc_d_cached[j] == gc_cached[i]) {
found = 1;
break;
}
}
if(!found && gc_cached[i]) {
free((void *)gc_cached[i]);
}
}
free(gc_cached);
}
if(gc_d_cached) {
free(gc_d_cached);
}
}
/**
* @brief x8A4 version function
*/
const char *x8A4_version(void) {
char *version = calloc(1, 256);
// gc_cached[gc_count_cached++] = (uint64_t)version;
#if defined(RELEASE)
snprintf(version, 256, "x8A4: v%s", X8A4_API_VERSION);
#elif defined(ALPHA)
snprintf(version, 256, "x8A4: v%s-ALPHA(DIRTY-%7s-%s)", X8A4_API_VERSION, VERSION_COMMIT_SHA, VERSION_COMMIT_COUNT);
#elif defined(BETA)
snprintf(version, 256, "x8A4: v%s-BETA(DIRTY-%7s-%s)", X8A4_API_VERSION, VERSION_COMMIT_SHA, VERSION_COMMIT_COUNT);
#elif defined(RC)
snprintf(version, 256, "x8A4: v%s-RC(DIRTY-%7s-%s)", X8A4_API_VERSION, VERSION_COMMIT_SHA, VERSION_COMMIT_COUNT);
#else
snprintf(version, 256, "x8A4: v%s(DIRTY-%7s-%s)", X8A4_API_VERSION, VERSION_COMMIT_SHA, VERSION_COMMIT_COUNT);
#endif
#ifndef NDEBUG
snprintf(version, 256, "%s-DEBUG", version);
#endif // NDEBUG
return version;
}
/**
* @brief Get nonce-seeds OS dict variant
* @param[out] seeds_size
* @return Pointer to nonce-seeds(uint8_t array)
*/
uint8_t *x8A4_get_nonce_slots_os_dict(uint32_t *seeds_size, int slot_index) {
if(strcmp(gXPF.darwinVersion, "23.0.0") >= 0 && nonce_slot_format_cached == 1) {
} else {
return NULL;
}
if(!slots_cached) {
x8A4_get_cryptex_boot_slot_index();
if(!slots_cached) {
return NULL;
}
}
if (!seeds_size) {
x8A4_log_error("Failed to get nonce-seeds, out seeds size pointer is NULL!\n", "");
}
uint64_t nvram_dict = get_service_nvram_dict(get_dtre_options());
if (!nvram_dict) {
x8A4_log_error("Failed to get nonce-seeds, nvram dict is NULL!\n", "");
return NULL;
}
uint8_t *nonce_seeds = NULL;
char entry_str[20];
snprintf(entry_str, 20, "krn.%s", slots_cached[slot_index].nonce_slot_domain_descriptor->unique_string + 4);
if(strcmp(entry_str, "krn.c1ep") != 0 && strcmp(entry_str, "krn.pdmg") != 0) {
nonce_seeds =
get_nvram_entry_bytes(nvram_dict, entry_str, OS_DATA, seeds_size);
if (!nonce_seeds) {
x8A4_log_error("Failed to get nonce-seeds slot %s index: %d!\n", entry_str, slot_index);
}
} else {
x8A4_log_debug("Skipped slot %s index: %d!\n", entry_str, slot_index);
}
return nonce_seeds;
}
/**
* @brief Get nonce-seeds OS dict variant
* @param[out] seeds_size
* @return Pointer to nonce-seeds(uint8_t array)
*/
uint8_t *x8A4_get_nonce_seeds_os_dict(uint32_t *seeds_size) {
if (!seeds_size) {
x8A4_log_error("Failed to get nonce-seeds, out seeds size pointer is NULL!\n", "");
}
uint64_t nvram_dict = get_service_nvram_dict(get_dtre_options());
if (!nvram_dict) {
x8A4_log_error("Failed to get nonce-seeds, nvram dict is NULL!\n", "");
return NULL;
}
uint8_t *nonce_seeds = NULL;
if(strcmp(gXPF.darwinVersion, "23.0.0") >= 0 && nonce_slot_format_cached == 1) {
nonce_seeds = get_nvram_entry_bytes(nvram_dict, kKRNC1BTPropertyKey,
OS_DATA, seeds_size);
} else {
nonce_seeds = get_nvram_entry_bytes(nvram_dict, kNonceSeedsPropertyKey,
OS_DATA, seeds_size);
}
if (!nonce_seeds) {
x8A4_log_error("Failed to get nonce-seeds!\n", "");
}
return nonce_seeds;
}
/**
* @brief Get nonce-seeds registry variant
* @param[out] seeds_size
* @return Pointer to nonce-seeds(uint8_t array)
*/
uint8_t *x8A4_get_nonce_seeds_registry(uint32_t *seeds_size) {
if (!seeds_size) {
x8A4_log_error("Failed to get nonce-seeds, out seeds size pointer is NULL!\n", "");
return NULL;
}
uint8_t *nonce_seeds = NULL;
uint32_t nonce_seeds_len = get_nonce_seeds_len();
if (!nonce_seeds_len) {
x8A4_log_debug_error("Failed to get nonce-seeds length!\n", "");
return NULL;
}
*seeds_size = (uint32_t)nonce_seeds_len;
nonce_seeds = (uint8_t *)get_nonce_seeds_registry();
if (!nonce_seeds) {
x8A4_log_error("Failed to get nonce-seeds!\n", "Failed to get nonce-seeds!\n");
}
return nonce_seeds;
}
/**
* @brief Check if kernel is using nonce domains or nonce slots
*/
void x8A4_set_nonce_format(void) {
if(strcmp(gXPF.darwinVersion, "23.0.0") >= 0 && nonce_slot_format_cached == -1) {
nonce_slot_format_cached = xpf_find_nonce_domains_array() ? 0 : 1;
}
}
/**
* @brief Get a nonce seed from a domain index
* @param[out] nonce_seeds
* @param[out] seeds_size
* @param[in] domain_index
* @return Pointer to domain seed(uint8_t array)
*/
uint8_t *x8A4_get_domain_seed(uint8_t **nonce_seeds, uint32_t *seeds_size,
int domain_index) {
if (!nonce_seeds) {
x8A4_log_error("Failed to get nonce-seeds, out nonce seeds pointer to pointer is NULL!\n", "");
return NULL;
}
if (!seeds_size) {
x8A4_log_error("Failed to get nonce-seeds, out seeds size pointer is NULL!\n", "");
return NULL;
}
*(uint64_t *)nonce_seeds = (uint64_t)x8A4_get_nonce_seeds_registry(seeds_size);
if (!*nonce_seeds || !*seeds_size) {
if(nonce_slot_format_cached == 1) {
*(uint64_t *)nonce_seeds = (uint64_t)x8A4_get_nonce_slots_os_dict(seeds_size, domain_index);
} else {
*(uint64_t *)nonce_seeds = (uint64_t)x8A4_get_nonce_seeds_os_dict(seeds_size);
}
if (!*nonce_seeds || !*seeds_size) {
x8A4_log_error("Failed to get nonce-seeds!\n", "");
return NULL;
}
}
struct x8A4_nonce_seeds *nonce_seeds_struct = (struct x8A4_nonce_seeds *)*nonce_seeds;
return (uint8_t *)(&nonce_seeds_struct->seeds[domain_index].seed[0]);
}
/**
* @brief Get a nonce seed for a slot index
* @param[out] nonce_seeds
* @param[out] seeds_size
* @param[in] slot_index
* @return Pointer to slot seed(uint8_t array)
*/
uint8_t *x8A4_get_slot_seed(uint8_t **nonce_seeds, uint32_t *seeds_size,
int slot_index) {
if (!nonce_seeds) {
x8A4_log_error("Failed to get nonce-seeds, out nonce seeds pointer to pointer is NULL!\n", "");
return NULL;
}
if (!seeds_size) {
x8A4_log_error("Failed to get nonce-seeds, out seeds size pointer is NULL!\n", "");
return NULL;
}
*(uint64_t *)nonce_seeds = (uint64_t)x8A4_get_nonce_seeds_registry(seeds_size);
if (!*nonce_seeds || !*seeds_size) {
*(uint64_t *)nonce_seeds = (uint64_t)x8A4_get_nonce_slots_os_dict(seeds_size, slot_index);
if (!*nonce_seeds) {
x8A4_log_debug_error("Failed to get nonce-seeds! (%d)\n", slot_index);
return NULL;
}
if (!*nonce_seeds || !*seeds_size) {
x8A4_log_debug_error("Failed to get nonce-seeds! (%d)\n", slot_index);
return NULL;
}
struct x8A4_nonce_seeds_slot *nonce_seeds_struct =
(struct x8A4_nonce_seeds_slot *)*(uint64_t *)nonce_seeds;
return (uint8_t *)(nonce_seeds_struct->seed.seed);
} else {
struct x8A4_nonce_seeds_slot *nonce_seeds_struct =
(struct x8A4_nonce_seeds_slot *)nonce_seeds;
return (uint8_t *)(nonce_seeds_struct->seed.seed);
}
}
/**
* @brief Get nonce-seeds list of slots
* @return Pointer to nonce slots(struct array)
*/
struct x8A4_nonce_slot *x8A4_get_nonce_slots_list(void) {
if (slots_cached) {
return slots_cached;
}
uint64_t nonce_domains_array_addr = xpf_find_nonce_domains_array();
x8A4_log_debug("Got nonce_domains_array_addr: 0x%016llX\n", nonce_domains_array_addr);
if (!nonce_domains_array_addr) {
x8A4_log_error("Failed to get nonce_domains_array_addr!\n", "");
return NULL;
}
int nonce_domains_array_length =
xpf_find_nonce_domains_array_length(nonce_domains_array_addr);
x8A4_log_debug("Got nonce_domains_array_length: 0x%08X\n", xpf_find_nonce_domains_array_length(nonce_domains_array_addr));
if (!nonce_domains_array_length) {
x8A4_log_error("Failed to get nonce_domains_array_length!\n", "");
return NULL;
}
nonce_domains_array_addr += get_slide();
uint32_t nonce_slot_size = sizeof(struct x8A4_nonce_slot);
uint32_t nonce_descriptor_size = sizeof(struct x8A4_nonce_descriptor);
struct x8A4_nonce_slot *nonce_slots = (struct x8A4_nonce_slot *)calloc(nonce_domains_array_length, nonce_slot_size);
struct x8A4_nonce_descriptor *nonce_descriptors = (struct x8A4_nonce_descriptor *)calloc(nonce_domains_array_length, nonce_descriptor_size);
char *entitlements = (char *)calloc(nonce_domains_array_length, 256);
char *descriptions = (char *)calloc(nonce_domains_array_length, 256);
gc_cached[gc_count_cached++] = (uint64_t)nonce_slots;
gc_cached[gc_count_cached++] = (uint64_t)nonce_descriptors;
gc_cached[gc_count_cached++] = (uint64_t)entitlements;
gc_cached[gc_count_cached++] = (uint64_t)descriptions;
x8A4_log_debug_error("gc_cached[gc_count_cached++]: %d val: 0x%016llX\n", __LINE__, nonce_slots);
x8A4_log_debug_error("gc_cached[gc_count_cached++]: %d val: 0x%016llX\n", __LINE__, nonce_descriptors);
x8A4_log_debug_error("gc_cached[gc_count_cached++]: %d val: 0x%016llX\n", __LINE__, entitlements);
x8A4_log_debug_error("gc_cached[gc_count_cached++]: %d val: 0x%016llX\n", __LINE__, descriptions);
for (int i = 0; i < nonce_domains_array_length; i++) {
uint64_t array_index = nonce_domains_array_addr + (sizeof(uint64_t) * i);
uint64_t vmaddr = 0;
int ret = kread(array_index, &vmaddr, sizeof(uint64_t));
if (ret || !vmaddr) {
x8A4_log_error("Failed to read domain pointer %d from 0x%016llX (%d)!\n", i, array_index, ret);
if (nonce_slots)
free(nonce_slots);
if (nonce_descriptors)
free(nonce_descriptors);
if (entitlements)
free(entitlements);
if (descriptions)
free(descriptions);
return NULL;
}
ret = kread(vmaddr, &nonce_slots[i], nonce_slot_size);
if (ret) {
x8A4_log_error("Failed to read domain %d from 0x%016llX (%d)!\n", i, vmaddr, ret);
if (nonce_slots)
free(nonce_slots);
if (nonce_descriptors)
free(nonce_descriptors);
if (entitlements)
free(entitlements);
if (descriptions)
free(descriptions);
return NULL;
}
if(!nonce_slots[i].nonce_slot_domain_descriptor) {
continue;
}
ret = kread((uint64_t)nonce_slots[i].nonce_slot_domain_descriptor, &nonce_descriptors[i], nonce_descriptor_size);
if(ret || !nonce_descriptors[i].description || !nonce_descriptors[i].entitlement) {
continue;
}
nonce_slots[i].nonce_slot_domain_descriptor = &nonce_descriptors[i];
ret = kread((uint64_t)nonce_descriptors[i].entitlement, &entitlements[i * 256], 256);
if(ret) {
continue;
}
ret = kread((uint64_t)nonce_descriptors[i].description, &descriptions[i * 256], 256);
if(ret) {
continue;
}
nonce_descriptors[i].entitlement = &entitlements[i * 256];
nonce_descriptors[i].description = &descriptions[i * 256];
x8A4_log_debug("===========================================================\n", "");
x8A4_log_debug("Got vmaddr: 0x%016llX\n", vmaddr);
x8A4_log_debug("Got nonce_slots[i].nonce_slot_domain_descriptor: 0x%016llX\n", nonce_slots[i].nonce_slot_domain_descriptor);
x8A4_log_debug("Got nonce_descriptors[i].description: (0x%016llX:%s)\n", nonce_descriptors[i].description, nonce_descriptors[i].description);
x8A4_log_debug("Got nonce_descriptors[i].entitlement: (0x%016llX:%s)\n", nonce_descriptors[i].entitlement, nonce_descriptors[i].entitlement);
x8A4_log_debug("Got nonce_descriptors[i].domain_index: 0x%016llX\n", nonce_descriptors[i].domain_index);
x8A4_log_debug("Got nonce_descriptors[i].unknown_num1: 0x%016llX\n", nonce_descriptors[i].unknown_num1);
x8A4_log_debug("Got nonce_descriptors[i].unknown_num2: 0x%016llX\n", nonce_descriptors[i].unknown_num2);
x8A4_log_debug("Got nonce_descriptors[i].nonce_domain_boot_select_chip_default_function: 0x%016llX\n", nonce_descriptors[i].nonce_domain_boot_select_chip_default_function);
x8A4_log_debug("Got nonce_descriptors[i].nonce_domain_boot_nonce_accessible_function: 0x%016llX\n", nonce_descriptors[i].nonce_domain_boot_nonce_accessible_function);
x8A4_log_debug("Got nonce_slots[i].nonce_slot_init_function: 0x%016llX\n", nonce_slots[i].nonce_slot_init_function);
x8A4_log_debug("Got nonce_slots[i].nonce_slot_lock_function: 0x%016llX\n", nonce_slots[i].nonce_slot_lock_function);
x8A4_log_debug("Got nonce_slots[i].nonce_slot_unlock_function: 0x%016llX\n", nonce_slots[i].nonce_slot_unlock_function);
x8A4_log_debug("Got nonce_slots[i].nonce_slot_data: 0x%016llX\n", nonce_slots[i].nonce_slot_data);
}
slots_cached = nonce_slots;
return nonce_slots;
}
/**
* @brief Get nonce-seeds list of domains
* @return Pointer to nonce domains(struct array)
*/
struct x8A4_nonce_domain *x8A4_get_nonce_seeds_domain_list(void) {
if (domains_cached) {
return domains_cached;
}
uint64_t nonce_domains_array_addr = xpf_find_nonce_domains_array();
x8A4_log_debug("Got nonce_domains_array_addr: 0x%016llX\n", nonce_domains_array_addr);
if (!nonce_domains_array_addr) {
x8A4_log_error("Failed to get nonce_domains_array_addr!\n", "");
return NULL;
}
int nonce_domains_array_length =
xpf_find_nonce_domains_array_length(nonce_domains_array_addr);
if (!nonce_domains_array_length) {
x8A4_log_error("Failed to get nonce_domains_array_length!\n", "");
return NULL;
}
nonce_domains_array_addr += get_slide();
uint32_t domain_size = sizeof(struct x8A4_nonce_domain);
struct x8A4_nonce_domain *domains = calloc(nonce_domains_array_length, domain_size + 1);
for (int i = 0; i < nonce_domains_array_length; i++) {
uint64_t array_index = nonce_domains_array_addr + (sizeof(uint64_t) * i);
uint64_t vmaddr = 0;
int ret = kread(array_index, &vmaddr, sizeof(uint64_t));
if (ret || !vmaddr) {
x8A4_log_error("Failed to read domain pointer %d from 0x%016llX (%d)!\n", i, array_index, ret);
return NULL;
}
ret = kread(vmaddr, &domains[i], domain_size);
if (ret) {
x8A4_log_error("Failed to read domain %d from 0x%016llX (%d)!\n", i, vmaddr, ret);
return NULL;
}
x8A4_log_debug("Got vmaddr: 0x%016llX\n", vmaddr);
x8A4_log_debug("Got domains[i].description: 0x%016llX\n", domains[i].description);
x8A4_log_debug("Got domains[i].entitlement: 0x%016llX\n", domains[i].entitlement);
if (!domains[i].description || !domains[i].entitlement) {
x8A4_log_error("Failed to read domain %d from 0x%016llX!\n", i, vmaddr);
return NULL;
}
char tmp[100];
ret = kread((uint64_t)domains[i].description, tmp, 100);
if (ret) {
x8A4_log_error("Failed to read domain %d description from 0x%016llX (%d)!\n", i, vmaddr, ret);
return NULL;
}
domains[i].description = calloc(1, strlen(tmp) + 1);
gc_cached[gc_count_cached++] = (uint64_t)domains[i].description;
x8A4_log_debug_error("gc_cached[gc_count_cached++]: %d val: 0x%016llX\n", __LINE__, domains[i].description);
strcpy(domains[i].description, tmp);
memset(tmp, 0, 100);
ret = kread((uint64_t)domains[i].entitlement, tmp, 100);
if (ret) {
x8A4_log_error("Failed to read domain %d entitlement from 0x%016llX (%d)!\n", i, vmaddr, ret);
return NULL;
}
domains[i].entitlement = calloc(1, strlen(tmp) + 1);
gc_cached[gc_count_cached++] = (uint64_t)domains[i].entitlement;
x8A4_log_debug_error("gc_cached[gc_count_cached++]: %d val: 0x%016llX\n", __LINE__, domains[i].entitlement);
strcpy(domains[i].entitlement, tmp);
}
domains_cached = domains;
return domains;
}
/**
* @brief Get nonce-seeds domain count
* @return Domain count(int)
*/
int x8A4_get_domain_count(void) {
if (domains_count_cached >= 0) {
return domains_count_cached;
}
uint64_t nonce_domains_array_addr = xpf_find_nonce_domains_array();
if (!nonce_domains_array_addr) {
x8A4_log_error("Failed to get nonce_domains_array_addr!\n", "");
return 0;
}
int nonce_domains_array_length =
xpf_find_nonce_domains_array_length(nonce_domains_array_addr);
if (!nonce_domains_array_length) {
x8A4_log_error("Failed to get nonce_domains_array_length!\n", "");
return 0;
}
domains_count_cached = nonce_domains_array_length;
return nonce_domains_array_length;
}
/**
* @brief Get nonce-seeds slot index for an entitlement
* @return Slot index(int)
*/
int x8A4_get_slot_slots_index(const char *entitlement) {
struct x8A4_nonce_slot *slots = x8A4_get_nonce_slots_list();
if (!slots) {
x8A4_log_error("Failed to get nonce slots list!\n", "");
return -1;
}
int slot_count = x8A4_get_domain_count();
if (!slot_count) {
x8A4_log_error("Failed to get nonce domains count!\n", "");
return -1;
}
int slot_index = -1;
for (int i = 0; i < slot_count; i++) {
const char *ent = slots[i].nonce_slot_domain_descriptor->entitlement;
if (!ent) {
continue;
}
x8A4_log_debug("Got ent: %s\n", ent);
x8A4_log_debug("Got entitlement: %s\n", entitlement);
if (strcmp(ent, entitlement) == 0) {
slot_index = i;
break;
}
}
if (slot_index < 0) {
x8A4_log_error("Failed to get %s domains index!\n", entitlement);
}
return slot_index;
}
/**
* @brief Get nonce-seeds domain index for an entitlement
* @return Domain index(int)
*/
int x8A4_get_domain_domains_index(const char *entitlement) {
struct x8A4_nonce_domain *domains = x8A4_get_nonce_seeds_domain_list();
if (!domains) {
x8A4_log_error("Failed to get nonce domains list!\n", "");
return -1;
}
int domain_count = x8A4_get_domain_count();
if (!domain_count) {
x8A4_log_error("Failed to get nonce domains count!\n", "");
return -1;
}
int domains_index = -1;
for (int i = 0; i < domain_count; i++) {
const char *ent = domains[i].entitlement;
if (!ent) {
continue;
}
if (strcmp(ent, entitlement) == 0) {
domains_index = i;
break;
}
}
if (domains_index < 0) {
x8A4_log_error("Failed to get %s domains index!\n", entitlement);
}
return domains_index;
}
/**
* @brief Get nonce-seeds cryptex boot slot slots index
* @return Cryptex boot domain slots index(int)
*/
int x8A4_get_cryptex_boot_slot_slots_index(void) {
if (strcmp(gXPF.darwinVersion, "23.0.0") >= 0 && nonce_slot_format_cached == 1) {
} else {
return -1;
}
if (cryptex_slots_index_cached >= 0) {
return cryptex_slots_index_cached;
}
int slots_index = x8A4_get_slot_slots_index(
"com.apple.private.img4.nonce.cryptex1.boot");
if (slots_index < 0) {
x8A4_log_error("Failed to get cryptex boot slot slots index!\n", "");
}
cryptex_slots_index_cached = slots_index;
return slots_index;
}
/**
* @brief Get nonce-seeds cryptex boot domain domains index
* @return Cryptex boot domain domains index(int)
*/
int x8A4_get_cryptex_boot_domain_domains_index(void) {
if (strcmp(gXPF.darwinVersion, "22.0.0") >= 0) {
} else {
return -1;
}
if (cryptex_domains_index_cached >= 0) {
return cryptex_domains_index_cached;
}
int domains_index = x8A4_get_domain_domains_index(
"com.apple.private.img4.nonce.cryptex1.boot");
if (domains_index < 0) {
x8A4_log_error("Failed to get cryptex boot domain domains index!\n", "");
}
cryptex_domains_index_cached = domains_index;
return domains_index;
}
/**
* @brief Get nonce-seeds cryptex boot slot index
* @return Cryptex boot slot index(int)
*/
int x8A4_get_cryptex_boot_slot_index(void) {
if (strcmp(gXPF.darwinVersion, "23.0.0") >= 0 && nonce_slot_format_cached == 1) {
} else {
return -1;
}
if (cryptex_index_cached >= 0) {
return cryptex_index_cached;
}
struct x8A4_nonce_slot *slots = x8A4_get_nonce_slots_list();
if (!slots) {
x8A4_log_error("Failed to get nonce slots list!\n", "");
return -1;
}
int slots_index = x8A4_get_cryptex_boot_slot_slots_index();
if (slots_index < 0) {
x8A4_log_error("Failed to get cryptex boot slot slots index!\n", "");
return -1;
}
cryptex_index_cached = (int)slots[slots_index].nonce_slot_domain_descriptor->domain_index;
return cryptex_index_cached;
}
/**
* @brief Get nonce-seeds cryptex boot domain index
* @return Cryptex boot domain index(int)
*/
int x8A4_get_cryptex_boot_domain_index(void) {
if (strcmp(gXPF.darwinVersion, "22.0.0") >= 0) {
} else {
return -1;
}
if (cryptex_index_cached >= 0) {
return cryptex_index_cached;
}
struct x8A4_nonce_domain *domains = x8A4_get_nonce_seeds_domain_list();
if (!domains) {
x8A4_log_error("Failed to get nonce domains list!\n", "");
return -1;
}
int domains_index = x8A4_get_cryptex_boot_domain_domains_index();
if (domains_index < 0) {
x8A4_log_error("Failed to get cryptex boot domain domains index!\n", "");
return -1;
}
cryptex_index_cached = (int)domains[domains_index].domain_index;
return cryptex_index_cached;
}
/**
* @brief Get nonce-seeds
* @param[out] seeds_size
* @return Pointer to nonce seeds(uint8_t array)
*/
uint8_t *x8A4_get_nonce_seeds(uint32_t *seeds_size) {
uint32_t count = x8A4_get_domain_count();
struct x8A4_nonce_seeds_slot *nonce_seeds = NULL;
x8A4_log_debug_error("gc_cached[gc_count_cached++]: %d val: 0x%016llX\n", __LINE__, nonce_seeds);
if(strcmp(gXPF.darwinVersion, "23.0.0") >= 0 && nonce_slot_format_cached == 1) {
nonce_seeds = calloc(count, sizeof(struct x8A4_nonce_seeds_slot));
for (int i = 0; i < count; i++) {
uint32_t sz = 0;
x8A4_log_debug_error("&nonce_seeds[i]: 0x%016llX\n", &nonce_seeds[i]);
uint8_t *ret = x8A4_get_slot_seed((uint8_t **)&nonce_seeds[i], &sz, i);
if (!ret) {
continue;
}
const void *ptr = (const void *)*(uint64_t *)&nonce_seeds[i];
if(!ptr) {
continue;
}
memcpy(&nonce_seeds[i], ptr, sizeof(struct x8A4_nonce_seeds_slot));
*seeds_size += sz;
}
gc_cached[gc_count_cached++] = (uint64_t)nonce_seeds;
return (uint8_t *)nonce_seeds;
} else {
nonce_seeds = calloc(count, sizeof(struct x8A4_nonce_seeds));
x8A4_get_domain_seed((uint8_t **)nonce_seeds, seeds_size, 0);
gc_cached[gc_count_cached++] = (uint64_t)nonce_seeds;
return (uint8_t *)*(uint64_t *)nonce_seeds;
}
}
/**
* @brief Get nonce-seeds cryptex boot domain seed
* @param[out] nonce_seeds
* @param[out] seeds_size
* @return Pointer to cryptex seed(uint8_t array)
*/
uint8_t *x8A4_get_cryptex_seed(uint8_t **nonce_seeds, uint32_t *seeds_size) {
if (strcmp(gXPF.darwinVersion, "22.0.0") >= 0) {
} else {
return NULL;
}
int cryptex_boot_index = 0;
if(strcmp(gXPF.darwinVersion, "23.0.0") >= 0 && nonce_slot_format_cached == 1) {
cryptex_boot_index = x8A4_get_cryptex_boot_slot_slots_index();
} else {
cryptex_boot_index = x8A4_get_cryptex_boot_domain_index();
}
if (cryptex_boot_index < 0) {
x8A4_log_error("Failed to get cryptex boot index!\n", "");
return NULL;
}
if(strcmp(gXPF.darwinVersion, "23.0.0") >= 0 && nonce_slot_format_cached == 1) {
return x8A4_get_slot_seed(nonce_seeds, seeds_size,
cryptex_boot_index);
} else {
return x8A4_get_domain_seed(nonce_seeds, seeds_size,
cryptex_boot_index);
}
}
/**
* @brief Calulates cryptex boot seed nonce
* @param[out] seeds_size
* @return Pointer to cryptex nonce(uint8_t array)
*/
uint8_t *x8A4_get_cryptex_nonce(uint32_t *nonce_size) {
if (strcmp(gXPF.darwinVersion, "22.0.0") >= 0) {
} else {
return NULL;
}
if(!nonce_size) {
x8A4_log_error("Failed to get cryptex boot nonce, nonce size pointer is NULL!\n", "");
return NULL;
}
uint8_t **nonce_seeds = calloc(1, 1000);
gc_cached[gc_count_cached++] = (uint64_t)nonce_seeds;
x8A4_log_debug_error("gc_cached[gc_count_cached++]: %d val: 0x%016llX\n", __LINE__, nonce_seeds);
uint32_t seeds_size = 0;
uint8_t *seed = x8A4_get_cryptex_seed(nonce_seeds, &seeds_size);
if(!seed) {
x8A4_log_error("Failed to get cryptex boot seed!\n", "");
return NULL;
}
uint32_t keys_count = 0;
struct x8A4_accel_key *keys = x8A4_get_ioaesaccelkeys(&keys_count);
if(!keys || !keys_count) {
x8A4_log_error("Failed to get IOAESAccelerator keys! (%d:0x%016llX)\n", keys_count, keys);
return NULL;
}
uint32_t chosen_key = 0x8A4;
uint32_t struct_size = sizeof(struct x8A4_accel_key);
for (int i = 0; i < keys_count; i++) {
struct x8A4_accel_key *cur_key = keys + (struct_size * i);
if (cur_key->key_id == chosen_key) {
keys = cur_key;
break;
}
}
uint32_t *cryptex_key_key = &keys->key[0];
uint32_t *cryptex_key_iv = &keys->iv[0];
uint64_t seed_encrypt[] = { *(uint64_t *)&seed[0], *(uint64_t *)&seed[8]};
size_t encrypted_size = 0;
if(CCCrypt(kCCEncrypt, kCCAlgorithmAES128, 0, cryptex_key_key, kCCKeySizeAES128, cryptex_key_iv, seed_encrypt, sizeof(seed_encrypt), seed_encrypt, sizeof(seed_encrypt), &encrypted_size) != kCCSuccess || encrypted_size != sizeof(seed_encrypt)) {
return NULL;
}
uint32_t digest_len = get_hash_len();
if(!digest_len) {
digest_len = CC_SHA384_DIGEST_LENGTH;
}
uint8_t *cryptex_nonce = calloc(1, digest_len);
gc_cached[gc_count_cached++] = (uint64_t)cryptex_nonce;
x8A4_log_debug_error("gc_cached[gc_count_cached++]: %d val: 0x%016llX\n", __LINE__, cryptex_nonce);
if(digest_len == CC_SHA384_DIGEST_LENGTH) {
*nonce_size = CC_SHA256_DIGEST_LENGTH;
CC_SHA384(seed_encrypt, sizeof(seed_encrypt), cryptex_nonce);
} else if(digest_len == CC_SHA1_DIGEST_LENGTH) {
*nonce_size = digest_len;
CC_SHA1(seed_encrypt, sizeof(seed_encrypt), cryptex_nonce);
} else {
return NULL;
}
return cryptex_nonce;
}
/**
* @brief Syncs nvram ram with a list of keys
* @return Zero on success
*/
int x8A4_sync_nvram(void) {
const char *delete_me_key = "delete_me_key";
const char *delete_me_val = "delete_me_val";
int ret = 0;
const char *key_list[] = {
kBootNoncePropertyKey,
kNonceSeedsPropertyKey,
kKRNC1BTPropertyKey
};
for(int i = 0; i < 3; i++) {
ret = set_nvram_entry(get_dtre_options(), delete_me_key, delete_me_val);
if (ret) {
x8A4_log_error("Failed to sync nvram, set nvram(%s:%s) returned NULL!",
delete_me_key, delete_me_val);
return -1;
}
ret = set_nvram_entry(get_dtre_options(), kIONVRAMDeletePropertyKey,
delete_me_key);
if (ret) {
x8A4_log_error("Failed to sync nvram, set nvram(%s:%s) returned NULL!",
kIONVRAMDeletePropertyKey, delete_me_key);
return -1;
}
ret = set_nvram_entry(get_dtre_options(), kIONVRAMForceSyncNowPropertyKey,
key_list[i]);
if (ret) {
x8A4_log_error("Failed to sync nvram, set nvram(%s:%s) returned NULL!",
kIONVRAMForceSyncNowPropertyKey, key_list[i]);
return -1;
}
}
return 0;
}
/**
* @brief Get boot-nonce OS dict variant
* @param[out] generator_size
* @return Pointer to boot-nonce(uint8_t array)
*/
uint8_t *x8A4_get_boot_nonce_os_dict(uint32_t *generator_size) {
if (!generator_size) {
x8A4_log_error("Failed to get boot-nonce, out generator size pointer is NULL!\n", "");
}
uint64_t nvram_dict = get_service_nvram_dict(get_dtre_options());
if (!nvram_dict) {
x8A4_log_error("Failed to get boot-nonce, nvram dict is NULL!\n", "");
return NULL;
}
uint8_t *boot_nonce = get_nvram_entry_bytes(nvram_dict, kBootNoncePropertyKey, OS_STRING, generator_size);
if (!boot_nonce) {
x8A4_log_error("Failed to get boot-nonce!\n", "");
}
return boot_nonce;
}
/**
* @brief Set boot-nonce OS dict variant
* @param[in] generator
* @param[out] generator_size
* @return
*/
int x8A4_set_boot_nonce_os_dict(uint8_t *generator, uint32_t generator_size) {
if (!generator) {
x8A4_log_error("Failed to set boot-nonce, out generator pointer is NULL!\n", "");
return -1;
}
if (!generator_size) {
x8A4_log_error("Failed to set boot-nonce, out generator size pointer is NULL!\n", "");
return -1;
}
uint64_t nvram_dict = get_service_nvram_dict(get_dtre_options());
if (!nvram_dict) {
x8A4_log_error("Failed to get boot-nonce, nvram dict is NULL!\n", "");
return -1;
}
int ret = set_nvram_entry_bytes(nvram_dict, kBootNoncePropertyKey, generator, generator_size, OS_STRING);
if (ret) {
x8A4_log_error("Failed to set boot-nonce!\n", "");
return -1;
}
return 0;
}
/**
* @brief Set nonce-seeds OS dict variant
* @param[in] seed
* @param[in] domain_index
* @return
*/
int x8A4_set_nonce_seeds_os_dict(uint8_t *seed, int domain_index) {
if (!seed) {
x8A4_log_error("Failed to set nonce seed, seed is NULL!\n", "");
return -1;
}
uint64_t nvram_dict = get_service_nvram_dict(get_dtre_options());
if (!nvram_dict) {
x8A4_log_error("Failed to set nonce seed, nvram dict is NULL!\n", "");
return -1;
}
uint32_t seeds_size = 0;
uint8_t *nonce_seeds = NULL;
if(strcmp(gXPF.darwinVersion, "23.0.0") >= 0 && nonce_slot_format_cached == 1) {
nonce_seeds = get_nvram_entry_bytes(nvram_dict, kKRNC1BTPropertyKey,
OS_DATA, &seeds_size);
} else {
nonce_seeds = get_nvram_entry_bytes(nvram_dict, kNonceSeedsPropertyKey,
OS_DATA, &seeds_size);
}
if (!nonce_seeds) {
x8A4_log_error("Failed to get nonce-seeds!\n", "");
}
if(strcmp(gXPF.darwinVersion, "23.0.0") >= 0 && nonce_slot_format_cached == 1) {
struct x8A4_nonce_seeds_slot *slot = (struct x8A4_nonce_seeds_slot *)nonce_seeds;
memcpy(&slot->seed.seed, seed, 16);
int ret = set_nvram_entry_bytes(nvram_dict, kKRNC1BTPropertyKey, nonce_seeds, seeds_size, OS_DATA);
if (ret) {
x8A4_log_error("Failed to set nonce seed!\n", "");
return -1;
}
} else {
struct x8A4_nonce_seeds *seeds = (struct x8A4_nonce_seeds *)nonce_seeds;
memcpy(&seeds->seeds[domain_index].seed, seed, 16);
int ret = set_nvram_entry_bytes(nvram_dict, kNonceSeedsPropertyKey, nonce_seeds, seeds_size, OS_DATA);
if (ret) {
x8A4_log_error("Failed to set nonce seed!\n", "");
return -1;
}
}
x8A4_sync_nvram();
return 0;
}
/**
* @brief Get boot-nonce registry variant
* @param[out] generator_size
* @return Pointer to boot-nonce(uint8_t array)
*/
uint8_t *x8A4_get_boot_nonce_registry(uint32_t *generator_size) {
if (!generator_size) {
x8A4_log_error("Failed to get boot-nonce, out generator size pointer is NULL!\n", "");
return NULL;
}
uint8_t *generator = NULL;
uint32_t generator_len = get_boot_nonce_len();
if (!generator_len) {
if(verbose_cached)
x8A4_log_error("Failed to get boot-nonce length!\n", "");
return NULL;
}
*generator_size = (uint32_t)generator_len;
generator = (uint8_t *)get_boot_nonce_registry();
if (!generator) {
x8A4_log_error("Failed to get boot-nonce!\n", "");
}
return generator;
}
/**
* @brief Set boot-nonce registry variant
* @param[out] generator
* @return Zero on success
*/
int x8A4_set_boot_nonce_registry(uint8_t *generator) {
int ret = set_nvram_entry(get_dtre_options(), kBootNoncePropertyKey,
(const char *)generator);
if(ret) {
if(verbose_cached)
x8A4_log_error("Failed to set nvram entry(%s)!\n", kBootNoncePropertyKey);
return -1;
}
ret = set_nvram_entry(get_dtre_options(), kIONVRAMSyncNowPropertyKey,
kBootNoncePropertyKey);
if(ret) {
if(verbose_cached)