mirror of
https://github.com/SideStore/SideStore.git
synced 2026-02-09 06:43:25 +01:00
620 lines
24 KiB
Objective-C
620 lines
24 KiB
Objective-C
#ifdef MDC
|
|
@import Darwin;
|
|
@import Foundation;
|
|
@import MachO;
|
|
|
|
#import <mach-o/fixup-chains.h>
|
|
// you'll need helpers.m from Ian Beer's write_no_write and vm_unaligned_copy_switch_race.m from
|
|
// WDBFontOverwrite
|
|
// Also, set an NSAppleMusicUsageDescription in Info.plist (can be anything)
|
|
// Please don't call this code on iOS 14 or below
|
|
// (This temporarily overwrites tccd, and on iOS 14 and above changes do not revert on reboot)
|
|
#import "grant_fda.h"
|
|
#import "helping_tools.h"
|
|
#import "vm_unalign_csr.h"
|
|
|
|
typedef NSObject* xpc_object_t;
|
|
typedef xpc_object_t xpc_connection_t;
|
|
typedef void (^xpc_handler_t)(xpc_object_t object);
|
|
xpc_object_t xpc_dictionary_create(const char* const _Nonnull* keys,
|
|
xpc_object_t _Nullable const* values, size_t count);
|
|
xpc_connection_t xpc_connection_create_mach_service(const char* name, dispatch_queue_t targetq,
|
|
uint64_t flags);
|
|
void xpc_connection_set_event_handler(xpc_connection_t connection, xpc_handler_t handler);
|
|
void xpc_connection_resume(xpc_connection_t connection);
|
|
void xpc_connection_send_message_with_reply(xpc_connection_t connection, xpc_object_t message,
|
|
dispatch_queue_t replyq, xpc_handler_t handler);
|
|
xpc_object_t xpc_connection_send_message_with_reply_sync(xpc_connection_t connection,
|
|
xpc_object_t message);
|
|
xpc_object_t xpc_bool_create(bool value);
|
|
xpc_object_t xpc_string_create(const char* string);
|
|
xpc_object_t xpc_null_create(void);
|
|
const char* xpc_dictionary_get_string(xpc_object_t xdict, const char* key);
|
|
|
|
int64_t sandbox_extension_consume(const char* token);
|
|
|
|
// MARK: - patchfind
|
|
|
|
struct fda_offsets {
|
|
uint64_t of_addr_com_apple_tcc_;
|
|
uint64_t offset_pad_space_for_rw_string;
|
|
uint64_t of_addr_s_kTCCSML;
|
|
uint64_t of_auth_got_sb_init;
|
|
uint64_t of_return_0;
|
|
bool is_arm64e;
|
|
};
|
|
|
|
static bool pchfind_sections(void* execmap,
|
|
struct segment_command_64** data_seg,
|
|
struct symtab_command** stabout,
|
|
struct dysymtab_command** dystabout) {
|
|
struct mach_header_64* executable_header = execmap;
|
|
struct load_command* load_command = execmap + sizeof(struct mach_header_64);
|
|
for (int load_command_index = 0; load_command_index < executable_header->ncmds;
|
|
load_command_index++) {
|
|
switch (load_command->cmd) {
|
|
case LC_SEGMENT_64: {
|
|
struct segment_command_64* segment = (struct segment_command_64*)load_command;
|
|
if (strcmp(segment->segname, "__DATA_CONST") == 0) {
|
|
*data_seg = segment;
|
|
}
|
|
break;
|
|
}
|
|
case LC_SYMTAB: {
|
|
*stabout = (struct symtab_command*)load_command;
|
|
break;
|
|
}
|
|
case LC_DYSYMTAB: {
|
|
*dystabout = (struct dysymtab_command*)load_command;
|
|
break;
|
|
}
|
|
}
|
|
load_command = ((void*)load_command) + load_command->cmdsize;
|
|
}
|
|
return true;
|
|
}
|
|
|
|
static uint64_t pchfind_get_padding(struct segment_command_64* segment) {
|
|
struct section_64* section_array = ((void*)segment) + sizeof(struct segment_command_64);
|
|
struct section_64* last_section = §ion_array[segment->nsects - 1];
|
|
return last_section->offset + last_section->size;
|
|
}
|
|
|
|
static uint64_t pchfind_pointer_to_string(void* em, size_t el, const char* n) {
|
|
void* str_offset = memmem(em, el, n, strlen(n) + 1);
|
|
if (!str_offset) {
|
|
return 0;
|
|
}
|
|
uint64_t str_file_offset = str_offset - em;
|
|
for (int i = 0; i < el; i += 8) {
|
|
uint64_t val = *(uint64_t*)(em + i);
|
|
if ((val & 0xfffffffful) == str_file_offset) {
|
|
return i;
|
|
}
|
|
}
|
|
return 0;
|
|
}
|
|
|
|
static uint64_t pchfind_return_0(void* exmp, size_t el) {
|
|
// TCCDSyncAccessAction::sequencer
|
|
// mov x0, #0
|
|
// ret
|
|
static const char ndle[] = {0x00, 0x00, 0x80, 0xd2, 0xc0, 0x03, 0x5f, 0xd6};
|
|
void* offset = memmem(exmp, el, ndle, sizeof(ndle));
|
|
if (!offset) {
|
|
return 0;
|
|
}
|
|
return offset - exmp;
|
|
}
|
|
|
|
static uint64_t pchfind_got(void* ecm, size_t executable_length,
|
|
struct segment_command_64* data_const_segment,
|
|
struct symtab_command* symtab_command,
|
|
struct dysymtab_command* dysymtab_command,
|
|
const char* target_symbol_name) {
|
|
uint64_t target_symbol_index = 0;
|
|
for (int sym_index = 0; sym_index < symtab_command->nsyms; sym_index++) {
|
|
struct nlist_64* sym =
|
|
((struct nlist_64*)(ecm + symtab_command->symoff)) + sym_index;
|
|
const char* sym_name = ecm + symtab_command->stroff + sym->n_un.n_strx;
|
|
if (strcmp(sym_name, target_symbol_name)) {
|
|
continue;
|
|
}
|
|
// printf("%d %llx\n", sym_index, (uint64_t)(((void*)sym) - execmap));
|
|
target_symbol_index = sym_index;
|
|
break;
|
|
}
|
|
|
|
struct section_64* section_array =
|
|
((void*)data_const_segment) + sizeof(struct segment_command_64);
|
|
struct section_64* first_section = §ion_array[0];
|
|
if (!(strcmp(first_section->sectname, "__auth_got") == 0 ||
|
|
strcmp(first_section->sectname, "__got") == 0)) {
|
|
return 0;
|
|
}
|
|
uint32_t* indirect_table = ecm + dysymtab_command->indirectsymoff;
|
|
|
|
for (int i = 0; i < first_section->size; i += 8) {
|
|
uint64_t val = *(uint64_t*)(ecm + first_section->offset + i);
|
|
uint64_t indirect_table_entry = (val & 0xfffful);
|
|
if (indirect_table[first_section->reserved1 + indirect_table_entry] == target_symbol_index) {
|
|
return first_section->offset + i;
|
|
}
|
|
}
|
|
return 0;
|
|
}
|
|
|
|
static bool pchfind(void* execmap, size_t executable_length,
|
|
struct fda_offsets* offsets) {
|
|
struct segment_command_64* data_const_segment = nil;
|
|
struct symtab_command* symtab_command = nil;
|
|
struct dysymtab_command* dysymtab_command = nil;
|
|
if (!pchfind_sections(execmap, &data_const_segment, &symtab_command,
|
|
&dysymtab_command)) {
|
|
// printf("no sections\n");
|
|
return false;
|
|
}
|
|
if ((offsets->of_addr_com_apple_tcc_ =
|
|
pchfind_pointer_to_string(execmap, executable_length, "com.apple.tcc.")) == 0) {
|
|
// printf("no com.apple.tcc. string\n");
|
|
return false;
|
|
}
|
|
if ((offsets->offset_pad_space_for_rw_string =
|
|
pchfind_get_padding(data_const_segment)) == 0) {
|
|
// printf("no padding\n");
|
|
return false;
|
|
}
|
|
if ((offsets->of_addr_s_kTCCSML = pchfind_pointer_to_string(
|
|
execmap, executable_length, "kTCCServiceMediaLibrary")) == 0) {
|
|
// printf("no kTCCServiceMediaLibrary string\n");
|
|
return false;
|
|
}
|
|
if ((offsets->of_auth_got_sb_init =
|
|
pchfind_got(execmap, executable_length, data_const_segment, symtab_command,
|
|
dysymtab_command, "_sandbox_init")) == 0) {
|
|
// printf("no sandbox_init\n");
|
|
return false;
|
|
}
|
|
if ((offsets->of_return_0 = pchfind_return_0(execmap, executable_length)) ==
|
|
0) {
|
|
// printf("no just return 0\n");
|
|
return false;
|
|
}
|
|
struct mach_header_64* executable_header = execmap;
|
|
offsets->is_arm64e = (executable_header->cpusubtype & ~CPU_SUBTYPE_MASK) == CPU_SUBTYPE_ARM64E;
|
|
|
|
return true;
|
|
}
|
|
|
|
// MARK: - tccd patching
|
|
|
|
static void call_tcc_daemon(void (^completion)(NSString* _Nullable extension_token)) {
|
|
// reimplmentation of TCCAccessRequest, as we need to grab and cache the sandbox token so we can
|
|
// re-use it until next reboot.
|
|
// Returns the sandbox token if there is one, or nil if there isn't one.
|
|
//TODO WARNING REPLACE com.apple.tccd
|
|
xpc_connection_t connection = xpc_connection_create_mach_service(
|
|
"TXUWU", dispatch_get_global_queue(QOS_CLASS_USER_INITIATED, 0), 0);
|
|
xpc_connection_set_event_handler(connection, ^(xpc_object_t object) {
|
|
// NSLog(@"event handler (xpc): %@", object);
|
|
});
|
|
xpc_connection_resume(connection);
|
|
const char* keys[] = {
|
|
// "TCCD_MSG_ID", "function", "service", "require_purpose", "preflight",
|
|
// "target_token", "background_session",
|
|
};
|
|
xpc_object_t values[] = {
|
|
xpc_string_create("17087.1"),
|
|
xpc_string_create("TCCAccessRequest"),
|
|
xpc_string_create("com.apple.app-sandbox.read-write"),
|
|
xpc_null_create(),
|
|
xpc_bool_create(false),
|
|
xpc_null_create(),
|
|
xpc_bool_create(false),
|
|
};
|
|
xpc_object_t request_message = xpc_dictionary_create(keys, values, sizeof(keys) / sizeof(*keys));
|
|
#if 0
|
|
xpc_object_t response_message = xpc_connection_send_message_with_reply_sync(connection, request_message);
|
|
// NSLog(@"%@", response_message);
|
|
|
|
#endif
|
|
xpc_connection_send_message_with_reply(
|
|
connection, request_message, dispatch_get_global_queue(QOS_CLASS_USER_INITIATED, 0),
|
|
^(xpc_object_t object) {
|
|
if (!object) {
|
|
//object is nil???
|
|
// NSLog(@"wqfewfw9");
|
|
completion(nil);
|
|
return;
|
|
}
|
|
//response:
|
|
// NSLog(@"qwdqwd%@", object);
|
|
if ([object isKindOfClass:NSClassFromString(@"OS_xpc_error")]) {
|
|
// NSLog(@"xpc error?");
|
|
completion(nil);
|
|
return;
|
|
}
|
|
//debug description:
|
|
// NSLog(@"wqdwqu %@", [object debugDescription]);
|
|
const char* extension_string = xpc_dictionary_get_string(object, "extension");
|
|
NSString* extension_nsstring =
|
|
extension_string ? [NSString stringWithUTF8String:extension_string] : nil;
|
|
completion(extension_nsstring);
|
|
});
|
|
}
|
|
|
|
static NSData* patch_tcc_daemon(void* executableMap, size_t executableLength) {
|
|
struct fda_offsets offsets = {};
|
|
if (!pchfind(executableMap, executableLength, &offsets)) {
|
|
return nil;
|
|
}
|
|
|
|
NSMutableData* data = [NSMutableData dataWithBytes:executableMap length:executableLength];
|
|
// strcpy(data.mutableBytes, "com.apple.app-sandbox.read-write", sizeOfStr);
|
|
char* mutableBytes = data.mutableBytes;
|
|
{
|
|
// rewrite com.apple.tcc. into blank string
|
|
*(uint64_t*)(mutableBytes + offsets.of_addr_com_apple_tcc_ + 8) = 0;
|
|
}
|
|
{
|
|
// make of_addr_s_kTCCSML point to "com.apple.app-sandbox.read-write"
|
|
// we need to stick this somewhere; just put it in the padding between
|
|
// the end of __objc_arrayobj and the end of __DATA_CONST
|
|
strcpy((char*)(data.mutableBytes + offsets.offset_pad_space_for_rw_string),
|
|
"com.apple.app-sandbox.read-write");
|
|
struct dyld_chained_ptr_arm64e_rebase tRBase =
|
|
*(struct dyld_chained_ptr_arm64e_rebase*)(mutableBytes +
|
|
offsets.of_addr_s_kTCCSML);
|
|
tRBase.target = offsets.offset_pad_space_for_rw_string;
|
|
*(struct dyld_chained_ptr_arm64e_rebase*)(mutableBytes +
|
|
offsets.of_addr_s_kTCCSML) =
|
|
tRBase;
|
|
*(uint64_t*)(mutableBytes + offsets.of_addr_s_kTCCSML + 8) =
|
|
strlen("com.apple.app-sandbox.read-write");
|
|
}
|
|
if (offsets.is_arm64e) {
|
|
// make sandbox_init call return 0;
|
|
struct dyld_chained_ptr_arm64e_auth_rebase tRBase = {
|
|
.auth = 1,
|
|
.bind = 0,
|
|
.next = 1,
|
|
.key = 0, // IA
|
|
.addrDiv = 1,
|
|
.diversity = 0,
|
|
.target = offsets.of_return_0,
|
|
};
|
|
*(struct dyld_chained_ptr_arm64e_auth_rebase*)(mutableBytes +
|
|
offsets.of_auth_got_sb_init) =
|
|
tRBase;
|
|
} else {
|
|
// make sandbox_init call return 0;
|
|
struct dyld_chained_ptr_64_rebase tRBase = {
|
|
.bind = 0,
|
|
.next = 2,
|
|
.target = offsets.of_return_0,
|
|
};
|
|
*(struct dyld_chained_ptr_64_rebase*)(mutableBytes + offsets.of_auth_got_sb_init) =
|
|
tRBase;
|
|
}
|
|
return data;
|
|
}
|
|
|
|
static bool over_write_file(int fd, NSData* sourceData) {
|
|
for (int off = 0; off < sourceData.length; off += 0x4000) {
|
|
bool success = false;
|
|
for (int i = 0; i < 2; i++) {
|
|
if (unalign_csr(
|
|
fd, off, sourceData.bytes + off,
|
|
off + 0x4000 > sourceData.length ? sourceData.length - off : 0x4000)) {
|
|
success = true;
|
|
break;
|
|
}
|
|
}
|
|
if (!success) {
|
|
return false;
|
|
}
|
|
}
|
|
return true;
|
|
}
|
|
|
|
static void grant_fda_impl(void (^completion)(NSString* extension_token,
|
|
NSError* _Nullable error)) {
|
|
// char* targetPath = "/System/Library/PrivateFrameworks/TCC.framework/Support/tccd";
|
|
char* targetPath = "/Nope";
|
|
int fd = open(targetPath, O_RDONLY | O_CLOEXEC);
|
|
if (fd == -1) {
|
|
// iOS 15.3 and below
|
|
// targetPath = "/System/Library/PrivateFrameworks/TCC.framework/tccd";
|
|
targetPath = "/Nope";
|
|
fd = open(targetPath, O_RDONLY | O_CLOEXEC);
|
|
}
|
|
off_t targetLength = lseek(fd, 0, SEEK_END);
|
|
lseek(fd, 0, SEEK_SET);
|
|
void* targetMap = mmap(nil, targetLength, PROT_READ, MAP_SHARED, fd, 0);
|
|
|
|
NSData* originalData = [NSData dataWithBytes:targetMap length:targetLength];
|
|
NSData* sourceData = patch_tcc_daemon(targetMap, targetLength);
|
|
if (!sourceData) {
|
|
completion(nil, [NSError errorWithDomain:@"com.worthdoingbadly.fulldiskaccess"
|
|
code:5
|
|
userInfo:@{NSLocalizedDescriptionKey : @"Can't patchfind."}]);
|
|
return;
|
|
}
|
|
|
|
if (!over_write_file(fd, sourceData)) {
|
|
over_write_file(fd, originalData);
|
|
munmap(targetMap, targetLength);
|
|
completion(
|
|
nil, [NSError errorWithDomain:@"com.worthdoingbadly.fulldiskaccess"
|
|
code:1
|
|
userInfo:@{
|
|
NSLocalizedDescriptionKey : @"Can't overwrite file: your device may "
|
|
@"not be vulnerable to CVE-2022-46689."
|
|
}]);
|
|
return;
|
|
}
|
|
munmap(targetMap, targetLength);
|
|
|
|
// crash_with_xpc_thingy("com.apple.tccd");
|
|
|
|
sleep(1);
|
|
call_tcc_daemon(^(NSString* _Nullable extension_token) {
|
|
over_write_file(fd, originalData);
|
|
// crash_with_xpc_thingy("com.apple.tccd");
|
|
NSError* returnError = nil;
|
|
if (extension_token == nil) {
|
|
returnError =
|
|
[NSError errorWithDomain:@"com.worthdoingbadly.fulldiskaccess"
|
|
code:2
|
|
userInfo:@{
|
|
NSLocalizedDescriptionKey : @"no extension token returned."
|
|
}];
|
|
} else if (![extension_token containsString:@"com.apple.app-sandbox.read-write"]) {
|
|
returnError = [NSError
|
|
errorWithDomain:@"com.worthdoingbadly.fulldiskaccess"
|
|
code:3
|
|
userInfo:@{
|
|
NSLocalizedDescriptionKey : @"failed: returned a media library token "
|
|
@"instead of an app sandbox token."
|
|
}];
|
|
extension_token = nil;
|
|
}
|
|
completion(extension_token, returnError);
|
|
});
|
|
}
|
|
|
|
void grant_fda(void (^completion)(NSError* _Nullable)) {
|
|
if (!NSClassFromString(@"NSPresentationIntent")) {
|
|
// class introduced in iOS 15.0.
|
|
// TODO(zhuowei): maybe check the actual OS version instead?
|
|
completion([NSError
|
|
errorWithDomain:@"com.worthdoingbadly.fulldiskaccess"
|
|
code:6
|
|
userInfo:@{
|
|
NSLocalizedDescriptionKey :
|
|
@"Not supported on iOS 14 and below."
|
|
}]);
|
|
return;
|
|
}
|
|
NSURL* documentDirectory = [NSFileManager.defaultManager URLsForDirectory:NSDocumentDirectory
|
|
inDomains:NSUserDomainMask][0];
|
|
NSURL* sourceURL =
|
|
[documentDirectory URLByAppendingPathComponent:@"fda_token.txt"];
|
|
NSError* error = nil;
|
|
NSString* cachedToken = [NSString stringWithContentsOfURL:sourceURL
|
|
encoding:NSUTF8StringEncoding
|
|
error:&error];
|
|
if (cachedToken) {
|
|
int64_t handle = sandbox_extension_consume(cachedToken.UTF8String);
|
|
if (handle > 0) {
|
|
// cached version worked
|
|
completion(nil);
|
|
return;
|
|
}
|
|
}
|
|
grant_fda_impl(^(NSString* extension_token, NSError* _Nullable error) {
|
|
if (error) {
|
|
completion(error);
|
|
return;
|
|
}
|
|
int64_t handle = sandbox_extension_consume(extension_token.UTF8String);
|
|
if (handle <= 0) {
|
|
completion([NSError
|
|
errorWithDomain:@"com.worthdoingbadly.fulldiskaccess"
|
|
code:4
|
|
userInfo:@{NSLocalizedDescriptionKey : @"Failed to consume generated extension"}]);
|
|
return;
|
|
}
|
|
[extension_token writeToURL:sourceURL
|
|
atomically:true
|
|
encoding:NSUTF8StringEncoding
|
|
error:&error];
|
|
completion(nil);
|
|
});
|
|
}
|
|
|
|
// MARK: - installd patch
|
|
|
|
struct daemon_remove_app_limit_offsets {
|
|
uint64_t offset_objc_method_list_t_MIInstallableBundle;
|
|
uint64_t offset_objc_class_rw_t_MIInstallableBundle_baseMethods;
|
|
uint64_t offset_data_const_end_padding;
|
|
// MIUninstallRecord::supportsSecureCoding
|
|
uint64_t offset_return_true;
|
|
};
|
|
|
|
struct daemon_remove_app_limit_offsets gAppLimitOffsets = {
|
|
.offset_objc_method_list_t_MIInstallableBundle = 0x519b0,
|
|
.offset_objc_class_rw_t_MIInstallableBundle_baseMethods = 0x804e8,
|
|
.offset_data_const_end_padding = 0x79c38,
|
|
.offset_return_true = 0x19860,
|
|
};
|
|
|
|
static uint64_t pchfind_find_rwt_base_methods(void* execmap,
|
|
size_t executable_length,
|
|
const char* needle) {
|
|
void* str_offset = memmem(execmap, executable_length, needle, strlen(needle) + 1);
|
|
if (!str_offset) {
|
|
return 0;
|
|
}
|
|
uint64_t str_file_offset = str_offset - execmap;
|
|
for (int i = 0; i < executable_length - 8; i += 8) {
|
|
uint64_t val = *(uint64_t*)(execmap + i);
|
|
if ((val & 0xfffffffful) != str_file_offset) {
|
|
continue;
|
|
}
|
|
// baseMethods
|
|
if (*(uint64_t*)(execmap + i + 8) != 0) {
|
|
return i + 8;
|
|
}
|
|
}
|
|
return 0;
|
|
}
|
|
|
|
static uint64_t pchfind_returns_true(void* execmap, size_t executable_length) {
|
|
// mov w0, #1
|
|
// ret
|
|
static const char needle[] = {0x20, 0x00, 0x80, 0x52, 0xc0, 0x03, 0x5f, 0xd6};
|
|
void* offset = memmem(execmap, executable_length, needle, sizeof(needle));
|
|
if (!offset) {
|
|
return 0;
|
|
}
|
|
return offset - execmap;
|
|
}
|
|
|
|
static bool pchfind_deaaamon(void* execmap, size_t executable_length,
|
|
struct daemon_remove_app_limit_offsets* offsets) {
|
|
struct segment_command_64* data_const_segment = nil;
|
|
struct symtab_command* symtab_command = nil;
|
|
struct dysymtab_command* dysymtab_command = nil;
|
|
if (!pchfind_sections(execmap, &data_const_segment, &symtab_command,
|
|
&dysymtab_command)) {
|
|
// printf("no sections\n");
|
|
return false;
|
|
}
|
|
if ((offsets->offset_data_const_end_padding = pchfind_get_padding(data_const_segment)) == 0) {
|
|
// printf("no padding\n");
|
|
return false;
|
|
}
|
|
if ((offsets->offset_objc_class_rw_t_MIInstallableBundle_baseMethods =
|
|
pchfind_find_rwt_base_methods(execmap, executable_length,
|
|
"MIInstallableBundle")) == 0) {
|
|
// printf("no MIInstallableBundle class_rw_t\n");
|
|
return false;
|
|
}
|
|
offsets->offset_objc_method_list_t_MIInstallableBundle =
|
|
(*(uint64_t*)(execmap +
|
|
offsets->offset_objc_class_rw_t_MIInstallableBundle_baseMethods)) &
|
|
0xffffffull;
|
|
|
|
if ((offsets->offset_return_true = pchfind_returns_true(execmap, executable_length)) ==
|
|
0) {
|
|
// printf("no return true\n");
|
|
return false;
|
|
}
|
|
return true;
|
|
}
|
|
|
|
struct objc_method {
|
|
int32_t name;
|
|
int32_t types;
|
|
int32_t imp;
|
|
};
|
|
|
|
struct objc_method_list {
|
|
uint32_t entsizeAndFlags;
|
|
uint32_t count;
|
|
struct objc_method methods[];
|
|
};
|
|
|
|
static void patch_cpy_methods(void* mutableBytes, uint64_t old_offset,
|
|
uint64_t new_offset, uint64_t* out_copied_length,
|
|
void (^callback)(const char* sel,
|
|
uint64_t* inout_function_pointer)) {
|
|
struct objc_method_list* original_list = mutableBytes + old_offset;
|
|
struct objc_method_list* new_list = mutableBytes + new_offset;
|
|
*out_copied_length =
|
|
sizeof(struct objc_method_list) + original_list->count * sizeof(struct objc_method);
|
|
new_list->entsizeAndFlags = original_list->entsizeAndFlags;
|
|
new_list->count = original_list->count;
|
|
for (int method_index = 0; method_index < original_list->count; method_index++) {
|
|
struct objc_method* method = &original_list->methods[method_index];
|
|
// Relative pointers
|
|
uint64_t name_file_offset = ((uint64_t)(&method->name)) - (uint64_t)mutableBytes + method->name;
|
|
uint64_t types_file_offset =
|
|
((uint64_t)(&method->types)) - (uint64_t)mutableBytes + method->types;
|
|
uint64_t imp_file_offset = ((uint64_t)(&method->imp)) - (uint64_t)mutableBytes + method->imp;
|
|
const char* sel = mutableBytes + (*(uint64_t*)(mutableBytes + name_file_offset) & 0xffffffull);
|
|
callback(sel, &imp_file_offset);
|
|
|
|
struct objc_method* new_method = &new_list->methods[method_index];
|
|
new_method->name = (int32_t)((int64_t)name_file_offset -
|
|
(int64_t)((uint64_t)&new_method->name - (uint64_t)mutableBytes));
|
|
new_method->types = (int32_t)((int64_t)types_file_offset -
|
|
(int64_t)((uint64_t)&new_method->types - (uint64_t)mutableBytes));
|
|
new_method->imp = (int32_t)((int64_t)imp_file_offset -
|
|
(int64_t)((uint64_t)&new_method->imp - (uint64_t)mutableBytes));
|
|
}
|
|
};
|
|
|
|
static NSData* make_installdaemon_patch(void* executableMap, size_t executableLength) {
|
|
struct daemon_remove_app_limit_offsets offsets = {};
|
|
if (!pchfind_deaaamon(executableMap, executableLength, &offsets)) {
|
|
return nil;
|
|
}
|
|
|
|
NSMutableData* data = [NSMutableData dataWithBytes:executableMap length:executableLength];
|
|
char* mutableBytes = data.mutableBytes;
|
|
uint64_t current_empty_space = offsets.offset_data_const_end_padding;
|
|
uint64_t copied_size = 0;
|
|
uint64_t new_method_list_offset = current_empty_space;
|
|
patch_cpy_methods(mutableBytes, offsets.offset_objc_method_list_t_MIInstallableBundle,
|
|
current_empty_space, &copied_size,
|
|
^(const char* sel, uint64_t* inout_address) {
|
|
if (strcmp(sel, "performVerificationWithError:") != 0) {
|
|
return;
|
|
}
|
|
*inout_address = offsets.offset_return_true;
|
|
});
|
|
current_empty_space += copied_size;
|
|
((struct
|
|
dyld_chained_ptr_arm64e_auth_rebase*)(mutableBytes +
|
|
offsets
|
|
.offset_objc_class_rw_t_MIInstallableBundle_baseMethods))
|
|
->target = new_method_list_offset;
|
|
return data;
|
|
}
|
|
|
|
bool installdaemon_patch() {
|
|
const char* targetPath = "/usr/libexec/installd";
|
|
int fd = open(targetPath, O_RDONLY | O_CLOEXEC);
|
|
off_t targetLength = lseek(fd, 0, SEEK_END);
|
|
lseek(fd, 0, SEEK_SET);
|
|
void* targetMap = mmap(nil, targetLength, PROT_READ, MAP_SHARED, fd, 0);
|
|
|
|
NSData* originalData = [NSData dataWithBytes:targetMap length:targetLength];
|
|
NSData* sourceData = make_installdaemon_patch(targetMap, targetLength);
|
|
if (!sourceData) {
|
|
//can't patchfind
|
|
// NSLog(@"wuiydqw98uuqwd");
|
|
return false;
|
|
}
|
|
|
|
if (!over_write_file(fd, sourceData)) {
|
|
over_write_file(fd, originalData);
|
|
munmap(targetMap, targetLength);
|
|
//can't overwrite
|
|
// NSLog(@"wfqiohuwdhuiqoji");
|
|
return false;
|
|
}
|
|
munmap(targetMap, targetLength);
|
|
crash_with_xpc_thingy("com.apple.mobile.installd");
|
|
sleep(1);
|
|
|
|
// TODO(zhuowei): for now we revert it once installd starts
|
|
// so the change will only last until when this installd exits
|
|
// over_write_file(fd, originalData);
|
|
return true;
|
|
}
|
|
#endif /* MDC */
|