├── .clang-format ├── .clang-tidy ├── .gitignore ├── .gitmodules ├── CMakeLists.txt ├── LICENSE ├── README.md ├── adbex_adbd.c ├── adbex_init.c ├── docs └── details.md ├── inject.c ├── ndk.cmake ├── package ├── .gitignore ├── META-INF │ └── com │ │ └── google │ │ └── android │ │ ├── update-binary │ │ └── updater-script ├── customize.sh ├── module.prop ├── post-fs-data.sh └── sepolicy.rule ├── prop_info.h ├── ptrace.c ├── ptrace.h ├── utils.c └── utils.h /.clang-format: -------------------------------------------------------------------------------- 1 | Language: Cpp 2 | BasedOnStyle: Google 3 | ColumnLimit: 120 4 | DerivePointerAlignment: false 5 | PointerAlignment: Left 6 | SortIncludes: Never 7 | IncludeBlocks: Preserve 8 | IndentPPDirectives: AfterHash 9 | ForEachMacros: [''] 10 | SpacesBeforeTrailingComments: 2 11 | -------------------------------------------------------------------------------- /.clang-tidy: -------------------------------------------------------------------------------- 1 | --- 2 | Checks: '-*, 3 | bugprone-argument-comment, 4 | bugprone-assert-side-effect, 5 | bugprone-bad-signal-to-kill-thread, 6 | bugprone-branch-clone, 7 | bugprone-copy-constructor-init, 8 | bugprone-dangling-handle, 9 | bugprone-dynamic-static-initializers, 10 | bugprone-fold-init-type, 11 | bugprone-forward-declaration-namespace, 12 | bugprone-forwarding-reference-overload, 13 | bugprone-inaccurate-erase, 14 | bugprone-incorrect-roundings, 15 | bugprone-integer-division, 16 | bugprone-lambda-function-name, 17 | bugprone-macro-parentheses, 18 | bugprone-macro-repeated-side-effects, 19 | bugprone-misplaced-operator-in-strlen-in-alloc, 20 | bugprone-misplaced-pointer-arithmetic-in-alloc, 21 | bugprone-misplaced-widening-cast, 22 | bugprone-move-forwarding-reference, 23 | bugprone-multiple-statement-macro, 24 | bugprone-no-escape, 25 | bugprone-parent-virtual-call, 26 | bugprone-posix-return, 27 | bugprone-reserved-identifier, 28 | bugprone-sizeof-container, 29 | bugprone-sizeof-expression, 30 | bugprone-spuriously-wake-up-functions, 31 | bugprone-string-constructor, 32 | bugprone-string-integer-assignment, 33 | bugprone-string-literal-with-embedded-nul, 34 | bugprone-suspicious-enum-usage, 35 | bugprone-suspicious-include, 36 | bugprone-suspicious-memset-usage, 37 | bugprone-suspicious-missing-comma, 38 | bugprone-suspicious-semicolon, 39 | bugprone-suspicious-string-compare, 40 | bugprone-suspicious-memory-comparison, 41 | bugprone-suspicious-realloc-usage, 42 | bugprone-swapped-arguments, 43 | bugprone-terminating-continue, 44 | bugprone-throw-keyword-missing, 45 | bugprone-too-small-loop-variable, 46 | bugprone-undefined-memory-manipulation, 47 | bugprone-undelegated-constructor, 48 | bugprone-unhandled-self-assignment, 49 | bugprone-unused-raii, 50 | bugprone-unused-return-value, 51 | bugprone-use-after-move, 52 | bugprone-virtual-near-miss, 53 | cert-dcl21-cpp, 54 | cert-dcl58-cpp, 55 | cert-err34-c, 56 | cert-err52-cpp, 57 | cert-err60-cpp, 58 | cert-flp30-c, 59 | cert-msc50-cpp, 60 | cert-msc51-cpp, 61 | cert-str34-c, 62 | clang-analyzer-core.BitwiseShift, 63 | clang-analyzer-core.CallAndMessage, 64 | clang-analyzer-core.NonNullParamChecker, 65 | clang-analyzer-core.NullDereference, 66 | clang-analyzer-core.StackAddressEscape, 67 | clang-analyzer-core.UndefinedBinaryOperatorResult, 68 | clang-analyzer-core.VLASize, 69 | clang-analyzer-core.uninitialized.Assign, 70 | clang-analyzer-core.uninitialized.Branch, 71 | clang-analyzer-core.uninitialized.CapturedBlockVariable, 72 | clang-analyzer-core.uninitialized.NewArraySize, 73 | clang-analyzer-core.uninitialized.UndefReturn, 74 | clang-analyzer-deadcode.DeadStores, 75 | clang-analyzer-optin.core.EnumCastOutOfRange, 76 | cppcoreguidelines-interfaces-global-init, 77 | cppcoreguidelines-narrowing-conversions, 78 | cppcoreguidelines-pro-type-member-init, 79 | cppcoreguidelines-pro-type-static-cast-downcast, 80 | cppcoreguidelines-slicing, 81 | google-default-arguments, 82 | google-explicit-constructor, 83 | google-runtime-operator, 84 | hicpp-exception-baseclass, 85 | hicpp-multiway-paths-covered, 86 | misc-misplaced-const, 87 | misc-new-delete-overloads, 88 | misc-no-recursion, 89 | misc-non-copyable-objects, 90 | misc-throw-by-value-catch-by-reference, 91 | misc-unconventional-assign-operator, 92 | misc-uniqueptr-reset-release, 93 | modernize-avoid-bind, 94 | modernize-concat-nested-namespaces, 95 | modernize-deprecated-headers, 96 | modernize-deprecated-ios-base-aliases, 97 | modernize-loop-convert, 98 | modernize-make-shared, 99 | modernize-make-unique, 100 | modernize-pass-by-value, 101 | modernize-raw-string-literal, 102 | modernize-redundant-void-arg, 103 | modernize-replace-auto-ptr, 104 | modernize-replace-disallow-copy-and-assign-macro, 105 | modernize-replace-random-shuffle, 106 | modernize-return-braced-init-list, 107 | modernize-shrink-to-fit, 108 | modernize-unary-static-assert, 109 | modernize-use-auto, 110 | modernize-use-bool-literals, 111 | modernize-use-emplace, 112 | modernize-use-equals-default, 113 | modernize-use-equals-delete, 114 | modernize-use-nodiscard, 115 | modernize-use-noexcept, 116 | modernize-use-nullptr, 117 | modernize-use-override, 118 | modernize-use-transparent-functors, 119 | modernize-use-uncaught-exceptions, 120 | mpi-buffer-deref, 121 | mpi-type-mismatch, 122 | openmp-use-default-none, 123 | performance-faster-string-find, 124 | performance-for-range-copy, 125 | performance-implicit-conversion-in-loop, 126 | performance-inefficient-algorithm, 127 | performance-inefficient-string-concatenation, 128 | performance-inefficient-vector-operation, 129 | performance-move-const-arg, 130 | performance-move-constructor-init, 131 | performance-no-automatic-move, 132 | performance-noexcept-move-constructor, 133 | performance-trivially-destructible, 134 | performance-type-promotion-in-math-fn, 135 | performance-unnecessary-copy-initialization, 136 | performance-unnecessary-value-param, 137 | portability-simd-intrinsics, 138 | readability-avoid-const-params-in-decls, 139 | readability-const-return-type, 140 | readability-container-size-empty, 141 | readability-convert-member-functions-to-static, 142 | readability-delete-null-pointer, 143 | readability-deleted-default, 144 | readability-inconsistent-declaration-parameter-name, 145 | readability-make-member-function-const, 146 | readability-misleading-indentation, 147 | readability-misplaced-array-index, 148 | readability-non-const-parameter, 149 | readability-redundant-control-flow, 150 | readability-redundant-declaration, 151 | readability-redundant-function-ptr-dereference, 152 | readability-redundant-smartptr-get, 153 | readability-redundant-string-cstr, 154 | readability-redundant-string-init, 155 | readability-simplify-subscript-expr, 156 | readability-static-accessed-through-instance, 157 | readability-static-definition-in-anonymous-namespace, 158 | readability-string-compare, 159 | readability-uniqueptr-delete-release, 160 | readability-use-anyofallof' 161 | -------------------------------------------------------------------------------- /.gitignore: -------------------------------------------------------------------------------- 1 | # IDEs 2 | .idea 3 | .vscode 4 | 5 | # Build directories 6 | build 7 | cmake-build-* 8 | 9 | # System 10 | .DS_Store 11 | -------------------------------------------------------------------------------- /.gitmodules: -------------------------------------------------------------------------------- 1 | [submodule "external/plthook"] 2 | path = external/plthook 3 | url = git@github.com:kubo/plthook.git 4 | -------------------------------------------------------------------------------- /CMakeLists.txt: -------------------------------------------------------------------------------- 1 | cmake_minimum_required(VERSION 3.22.1) 2 | include(ndk.cmake) 3 | project(adbex C) 4 | 5 | # LTO 6 | cmake_policy(SET CMP0069 NEW) 7 | set(CMAKE_POLICY_DEFAULT_CMP0069 NEW) 8 | include(CheckIPOSupported) 9 | check_ipo_supported(RESULT ipo_supported OUTPUT ipo_supported_output) 10 | if (ipo_supported) 11 | set(CMAKE_INTERPROCEDURAL_OPTIMIZATION_RELEASE TRUE) 12 | else () 13 | message(WARNING "IPO is not supported: ${ipo_supported_output}") 14 | endif () 15 | 16 | # Global options 17 | set(CMAKE_C_VISIBILITY_PRESET hidden) 18 | add_compile_options($<$:-Os>) 19 | add_link_options($<$:-s>) 20 | 21 | # plthook 22 | set(PLTHOOK_PATH external/plthook) 23 | set(PLTHOOK_SRC ${PLTHOOK_PATH}/plthook_elf.c) 24 | add_library(plthook STATIC ${PLTHOOK_SRC}) 25 | target_include_directories(plthook SYSTEM PUBLIC ${PLTHOOK_PATH}) 26 | 27 | # adbex 28 | add_executable(inject inject.c ptrace.c utils.c) 29 | target_link_libraries(inject) 30 | 31 | add_library(adbex_init SHARED adbex_init.c utils.c) 32 | target_link_libraries(adbex_init plthook) 33 | 34 | add_library(adbex_adbd SHARED adbex_adbd.c utils.c) 35 | target_link_libraries(adbex_adbd) 36 | -------------------------------------------------------------------------------- /LICENSE: -------------------------------------------------------------------------------- 1 | 2 | GNU GENERAL PUBLIC LICENSE 3 | Version 3, 29 June 2007 4 | 5 | Copyright (C) 2007 Free Software Foundation, Inc. 6 | Everyone is permitted to copy and distribute verbatim copies 7 | of this license document, but changing it is not allowed. 8 | 9 | Preamble 10 | 11 | The GNU General Public License is a free, copyleft license for 12 | software and other kinds of works. 13 | 14 | The licenses for most software and other practical works are designed 15 | to take away your freedom to share and change the works. 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Interpretation of Sections 15 and 16. 614 | 615 | If the disclaimer of warranty and limitation of liability provided 616 | above cannot be given local legal effect according to their terms, 617 | reviewing courts shall apply local law that most closely approximates 618 | an absolute waiver of all civil liability in connection with the 619 | Program, unless a warranty or assumption of liability accompanies a 620 | copy of the Program in return for a fee. 621 | 622 | END OF TERMS AND CONDITIONS 623 | 624 | How to Apply These Terms to Your New Programs 625 | 626 | If you develop a new program, and you want it to be of the greatest 627 | possible use to the public, the best way to achieve this is to make it 628 | free software which everyone can redistribute and change under these terms. 629 | 630 | To do so, attach the following notices to the program. It is safest 631 | to attach them to the start of each source file to most effectively 632 | state the exclusion of warranty; and each file should have at least 633 | the "copyright" line and a pointer to where the full notice is found. 634 | 635 | 636 | Copyright (C) 637 | 638 | This program is free software: you can redistribute it and/or modify 639 | it under the terms of the GNU General Public License as published by 640 | the Free Software Foundation, either version 3 of the License, or 641 | (at your option) any later version. 642 | 643 | This program is distributed in the hope that it will be useful, 644 | but WITHOUT ANY WARRANTY; without even the implied warranty of 645 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the 646 | GNU General Public License for more details. 647 | 648 | You should have received a copy of the GNU General Public License 649 | along with this program. If not, see . 650 | 651 | Also add information on how to contact you by electronic and paper mail. 652 | 653 | If the program does terminal interaction, make it output a short 654 | notice like this when it starts in an interactive mode: 655 | 656 | {project} Copyright (C) {year} {fullname} 657 | This program comes with ABSOLUTELY NO WARRANTY; for details type `show w'. 658 | This is free software, and you are welcome to redistribute it 659 | under certain conditions; type `show c' for details. 660 | 661 | The hypothetical commands `show w' and `show c' should show the appropriate 662 | parts of the General Public License. Of course, your program's commands 663 | might be different; for a GUI interface, you would use an "about box". 664 | 665 | You should also get your employer (if you work as a programmer) or school, 666 | if any, to sign a "copyright disclaimer" for the program, if necessary. 667 | For more information on this, and how to apply and follow the GNU GPL, see 668 | . 669 | 670 | The GNU General Public License does not permit incorporating your program 671 | into proprietary programs. If your program is a subroutine library, you 672 | may consider it more useful to permit linking proprietary applications with 673 | the library. If this is what you want to do, use the GNU Lesser General 674 | Public License instead of this License. But first, please read 675 | . 676 | -------------------------------------------------------------------------------- /README.md: -------------------------------------------------------------------------------- 1 | # ADBEx 2 | 3 | ## Introduction 4 | An adbd extension used for `adb root` and shell replacement. 5 | 6 | ## Prerequisites 7 | Magisk v24+, or KernelSU v0.4.0+ 8 | 9 | > Note that this module is not compatible with ZygiskNext versions lower than 1.0. 10 | 11 | ## Install 12 | Install as a module in Magisk/KernelSU manager app. 13 | 14 | ## Build 15 | *TODO* 16 | 17 | ## Credits 18 | - [tiann/adb_root](https://github.com/tiann/adb_root): Enable adb root in production build device for Android 11+. 19 | - [kubo/plthook](https://github.com/kubo/plthook): Hook function calls by replacing PLT(Procedure Linkage Table) entries. 20 | 21 | ## License 22 | This project is licensed under the [GNU General Public Licence, version 3](https://choosealicense.com/licenses/gpl-3.0/). 23 | -------------------------------------------------------------------------------- /adbex_adbd.c: -------------------------------------------------------------------------------- 1 | #include "utils.h" 2 | #include "prop_info.h" 3 | 4 | #include 5 | #include 6 | #include 7 | #include 8 | #include 9 | #include 10 | #include 11 | 12 | #define LOG_TAG "[adbex][adbd]" 13 | 14 | EXPORT int __android_log_is_debuggable() { return 1; } 15 | 16 | // For Android 9+ 17 | typedef void (*callback_t)(void* cookie, const char* name, const char* value, uint32_t serial); 18 | typedef void (*__system_property_read_callback_t)(const prop_info* pi, callback_t callback, void* cookie); 19 | __system_property_read_callback_t orig___system_property_read_callback; 20 | EXPORT void __system_property_read_callback(const prop_info* pi, callback_t callback, void* cookie) { 21 | if (unlikely(!strcmp(pi->name, "ro.secure"))) { 22 | klog(LOG_TAG, "__system_property_read: replaced ro.secure"); 23 | callback(cookie, pi->name, "0", pi->serial); 24 | } else if (unlikely(!strcmp(pi->name, "service.adb.root"))) { 25 | klog(LOG_TAG, "__system_property_read_callback: replaced service.adb.root"); 26 | callback(cookie, pi->name, "1", pi->serial); 27 | } else if (unlikely(!strcmp(pi->name, "ro.boot.verifiedbootstate"))) { 28 | klog(LOG_TAG, "__system_property_read_callback: replaced ro.boot.verifiedbootstate"); 29 | callback(cookie, pi->name, "orange", pi->serial); 30 | } else if (likely(orig___system_property_read_callback)) { 31 | orig___system_property_read_callback(pi, callback, cookie); 32 | } 33 | } 34 | 35 | // For Android 8+ 36 | typedef int (*__system_property_read_t)(const prop_info* pi, char* name, char* value); 37 | __system_property_read_t orig___system_property_read; 38 | EXPORT int __system_property_read(const prop_info* pi, char* name, char* value) { 39 | if (unlikely(!strcmp(pi->name, "ro.secure"))) { 40 | klog(LOG_TAG, "__system_property_read: replaced ro.secure"); 41 | if (name) strlcpy(name, pi->name, PROP_NAME_MAX); 42 | strcpy(value, "0"); 43 | return (int)strlen("0"); 44 | } else if (unlikely(!strcmp(pi->name, "service.adb.root"))) { 45 | klog(LOG_TAG, "__system_property_read: replaced service.adb.root"); 46 | if (name) strlcpy(name, pi->name, PROP_NAME_MAX); 47 | strcpy(value, "1"); 48 | return (int)strlen("1"); 49 | } else if (unlikely(!strcmp(pi->name, "ro.boot.verifiedbootstate"))) { 50 | klog(LOG_TAG, "__system_property_read: replaced ro.boot.verifiedbootstate"); 51 | if (name) strlcpy(name, pi->name, PROP_NAME_MAX); 52 | strcpy(value, "orange"); 53 | return (int)strlen("orange"); 54 | } else if (likely(orig___system_property_read)) { 55 | return orig___system_property_read(pi, name, value); 56 | } 57 | return 0; 58 | } 59 | 60 | // For Android 7+ 61 | typedef int (*__system_property_get_t)(const char* name, char* value); 62 | __system_property_get_t orig___system_property_get; 63 | EXPORT int __system_property_get(const char* name, char* value) { 64 | if (unlikely(!strcmp(name, "ro.secure"))) { 65 | klog(LOG_TAG, "__system_property_get: replaced ro.secure"); 66 | strcpy(value, "0"); 67 | return (int)strlen("0"); 68 | } else if (unlikely(!strcmp(name, "service.adb.root"))) { 69 | klog(LOG_TAG, "__system_property_get: replaced service.adb.root"); 70 | strcpy(value, "1"); 71 | return (int)strlen("1"); 72 | } else if (unlikely(!strcmp(name, "ro.boot.verifiedbootstate"))) { 73 | klog(LOG_TAG, "__system_property_get: replaced ro.boot.verifiedbootstate"); 74 | strcpy(value, "orange"); 75 | return (int)strlen("orange"); 76 | } else if (likely(orig___system_property_get)) { 77 | return orig___system_property_get(name, value); 78 | } 79 | return 0; 80 | } 81 | 82 | typedef int (*execle_t)(const char* path, const char* arg0, ...); 83 | execle_t orig_execle; 84 | EXPORT int execle(UNUSED const char* path, const char* arg0, ...) { 85 | va_list ap; 86 | va_start(ap, arg0); 87 | int argc = 1; 88 | const char *arg, *tmp; 89 | while ((tmp = va_arg(ap, char*))) { 90 | arg = tmp; 91 | argc++; 92 | } 93 | char** envp = va_arg(ap, char**); 94 | va_end(ap); 95 | 96 | const char* sh_path = _PATH_BSHELL; 97 | char shell[PROP_VALUE_MAX]; 98 | shell[0] = 0; 99 | __system_property_get("persist.sys.adb.shell", shell); 100 | if (likely(shell[0] && access(shell, X_OK) == 0)) { 101 | sh_path = shell; 102 | } 103 | 104 | if (unlikely(!orig_execle)) { 105 | errno = EINVAL; 106 | return -1; 107 | } 108 | 109 | int ret = -1; 110 | if (likely(argc == 1 || argc == 2)) { 111 | ret = orig_execle(sh_path, sh_path, "-", NULL, envp); 112 | } else if (argc == 3) { 113 | ret = orig_execle(sh_path, sh_path, "-c", arg, NULL, envp); 114 | } else { 115 | errno = EINVAL; 116 | } 117 | 118 | return ret; 119 | } 120 | 121 | CONSTRUCTOR UNUSED void adbex_adbd_main() { 122 | klog(LOG_TAG, "injected into adbd"); 123 | unsetenv("LD_PRELOAD"); 124 | 125 | void* libc = dlopen("libc.so", RTLD_NOW); 126 | if (libc) { 127 | orig___system_property_read_callback = 128 | (__system_property_read_callback_t)dlsym(libc, "__system_property_read_callback"); 129 | orig___system_property_read = (__system_property_read_t)dlsym(libc, "__system_property_read"); 130 | orig___system_property_get = (__system_property_get_t)dlsym(libc, "__system_property_get"); 131 | orig_execle = (execle_t)dlsym(libc, "execle"); 132 | } 133 | klog(LOG_TAG, "__system_property_read_callback: %p", orig___system_property_read_callback); 134 | klog(LOG_TAG, "__system_property_read: %p", orig___system_property_read); 135 | klog(LOG_TAG, "__system_property_get: %p", orig___system_property_get); 136 | klog(LOG_TAG, "execle: %p", orig_execle); 137 | } 138 | -------------------------------------------------------------------------------- /adbex_init.c: -------------------------------------------------------------------------------- 1 | #include "utils.h" 2 | 3 | #include 4 | #include 5 | #include 6 | #include 7 | 8 | #define LOG_TAG "[adbex][init]" 9 | 10 | #define ADBD_PATH_APEX "/apex/com.android.adbd/bin/adbd" 11 | #define ADBD_PATH "/system/bin/adbd" 12 | 13 | char adbex_adbd[PATH_MAX]; 14 | 15 | int (*orig_execv)(const char* path, char* const argv[]); 16 | int hook_execv(const char* path, char* const argv[]) { 17 | if (unlikely(!strcmp(path, ADBD_PATH_APEX) || !strcmp(path, ADBD_PATH))) { 18 | klog(LOG_TAG, "adbd pid: %d\n", getpid()); 19 | setenv("LD_PRELOAD", adbex_adbd, 1); 20 | return orig_execv(path, argv); 21 | } 22 | return orig_execv(path, argv); 23 | } 24 | 25 | CONSTRUCTOR UNUSED void adbex_init_main() { 26 | klog(LOG_TAG, "injected into init"); 27 | 28 | const char* adbex_path; 29 | if (access("/sbin/adbex", F_OK) == 0) { 30 | adbex_path = "/sbin/adbex"; 31 | } else { 32 | adbex_path = "/debug_ramdisk/adbex"; 33 | } 34 | snprintf(adbex_adbd, sizeof(adbex_adbd), "%s/libadbex_adbd.so", adbex_path); 35 | klog(LOG_TAG, "adbex_adbd: %s", adbex_adbd); 36 | 37 | plthook_t* plthook; 38 | int err = plthook_open_by_address(&plthook, (void*)get_module_base(1, "/init\n")); 39 | klog(LOG_TAG, "plthook err: %d\n", err); 40 | if (err) return; 41 | plthook_replace(plthook, "execv", (void*)&hook_execv, (void**)&orig_execv); 42 | } 43 | -------------------------------------------------------------------------------- /docs/details.md: -------------------------------------------------------------------------------- 1 | # Internal Details 2 | 3 | ## inject 4 | An injector used to inject `libadbex_init.so` into `init` process using `ptrace`. 5 | 6 | ## adbex_init 7 | Hook `execve` to inject `libadbex_adbd.so` into `adbd` process using `LD_PRELOAD`. 8 | 9 | ## adbex_adbd 10 | Magic happens here. 11 | 12 | ### ADB Root 13 | Fake current os as userdebug. 14 | 15 | #### Fake properties 16 | - ro.secure to 0 17 | - ro.debuggable to 1 18 | - service.adb.root to 1 19 | - ro.boot.verifiedbootstate to orange 20 | 21 | #### Fixup SELinux Policies 22 | Add missing [SELinux policies](https://android.googlesource.com/platform/system/sepolicy/+/refs/heads/main/private/adbd.te) in production build. 23 | ``` 24 | userdebug_or_eng(` 25 | allow adbd self:process setcurrent; 26 | allow adbd su:process dyntransition; 27 | ') 28 | ``` 29 | 30 | I don't want to fix it bit by bit, so simply set `su` and `adbd` to permissive: 31 | ``` 32 | permissive { su } 33 | permissive { adbd } 34 | ``` 35 | 36 | Fix init to adbd transition: 37 | ``` 38 | allow init adbd process noatsecure 39 | allow init adbd process2 nosuid_transition 40 | ``` 41 | 42 | Fix `adb install` failed/hang: 43 | ``` 44 | allow system_server su fd use 45 | allow system_server su unix_stream_socket { connectto getattr getopt ioctl read write shutdown } 46 | allow system_server su binder call 47 | ``` 48 | 49 | Fix app debug: 50 | ``` 51 | allow untrusted_app su unix_stream_socket { connectto getattr getopt ioctl read write shutdown } 52 | ``` 53 | 54 | Fix QtScrcpy and adb forward: 55 | ``` 56 | allow { surfaceflinger audioserver mediaswcodec mediacodec hwservicemanager netd } su * * 57 | ``` 58 | 59 | ### Custom Shell 60 | Hook `execle` to replace shell with whatever we want. 61 | 62 | The shell path is read from property `persist.sys.adb.shell`, similar to LineageOS. 63 | -------------------------------------------------------------------------------- /inject.c: -------------------------------------------------------------------------------- 1 | #include "utils.h" 2 | #include "ptrace.h" 3 | 4 | #include 5 | #include 6 | #include 7 | #include 8 | 9 | #define LOG_TAG "[adbex][inject]" 10 | 11 | uintptr_t reg_stack_alloc(struct user_regs_struct* regs, size_t size) { 12 | size = ALIGN_UP(size, sizeof(long)); 13 | regs->REG_SP -= size; 14 | return regs->REG_SP; 15 | } 16 | 17 | int inject(pid_t pid, const char* path) { 18 | klog(LOG_TAG, "pid: %d, path: %s\n", pid, path); 19 | 20 | Dl_info dl_info; 21 | if (dladdr(&dlopen, &dl_info) == 0) { 22 | klog(LOG_TAG, "can not find dlopen in injector process\n"); 23 | return -1; 24 | } 25 | 26 | uintptr_t local_libdl_base = (uintptr_t)dl_info.dli_fbase; 27 | uintptr_t local_dlopen = (uintptr_t)&dlopen; 28 | uintptr_t remote_libdl_base = get_module_base(pid, "/libdl.so\n"); 29 | if (remote_libdl_base == 0) { 30 | klog(LOG_TAG, "can not find libdl.so in target process\n"); 31 | return -1; 32 | } 33 | uintptr_t offset_dlopen = local_dlopen - local_libdl_base; 34 | uintptr_t remote_dlopen = remote_libdl_base + offset_dlopen; 35 | klog(LOG_TAG, "remote libdl: %p\n", (void*)remote_libdl_base); 36 | klog(LOG_TAG, "remote dlopen: %p\n", (void*)remote_dlopen); 37 | 38 | int path_size = (int)strlen(path) + 1; 39 | int path_size_aligned = ALIGN_UP(path_size, sizeof(long)); 40 | char path_aligned[PATH_MAX]; 41 | memset(path_aligned, 0, PATH_MAX); 42 | strcpy(path_aligned, path); 43 | 44 | if (ptrace_attach(pid)) { 45 | klog(LOG_TAG, "failed to attach\n"); 46 | return -1; 47 | } 48 | if (remote_wait(pid)) { 49 | klog(LOG_TAG, "remote_wait failed\n"); 50 | return -1; 51 | } 52 | 53 | struct user_regs_struct old_regs, regs; 54 | if (ptrace_getregs(pid, ®s)) { 55 | klog(LOG_TAG, "failed to get registers\n"); 56 | return -1; 57 | } 58 | memcpy(&old_regs, ®s, sizeof(struct user_regs_struct)); 59 | 60 | uintptr_t remote_path = reg_stack_alloc(®s, 1024); 61 | ptrace_write(pid, remote_path, path_aligned, path_size_aligned); 62 | 63 | uintptr_t args[2]; 64 | args[0] = remote_path; 65 | args[1] = RTLD_NOW; 66 | if (remote_call(pid, ®s, remote_dlopen, 2, args, remote_libdl_base)) { 67 | return -1; 68 | } 69 | klog(LOG_TAG, "dlopen handle: %p\n", (void*)regs.REG_RET); 70 | 71 | int ret = 0; 72 | 73 | if (regs.REG_RET == 0) { 74 | ret = -1; 75 | 76 | uintptr_t offset_dlerror = (uintptr_t)&dlerror - local_libdl_base; 77 | uintptr_t remote_dlerror = remote_libdl_base + offset_dlerror; 78 | if (remote_call(pid, ®s, remote_dlerror, 0, NULL, 0)) { 79 | return -1; 80 | } 81 | if (regs.REG_RET) { 82 | char buf[1024]; 83 | buf[0] = 0; 84 | ptrace_read(pid, regs.REG_RET, buf, 1024); 85 | klog(LOG_TAG, "dlerror: %s\n", buf); 86 | } else { 87 | klog(LOG_TAG, "dlerror: NULL\n"); 88 | } 89 | } 90 | 91 | if (ptrace_setregs(pid, &old_regs)) { 92 | klog(LOG_TAG, "failed to restore registers\n"); 93 | return -1; 94 | } 95 | if (ptrace_detach(pid)) { 96 | klog(LOG_TAG, "failed to detach\n"); 97 | return -1; 98 | } 99 | 100 | return ret; 101 | } 102 | 103 | int main(int argc, UNUSED char* argv[]) { 104 | if (argc != 3) { 105 | klog(LOG_TAG, "usage: inject pid path\n"); 106 | return -1; 107 | } 108 | 109 | pid_t opt_pid = (pid_t)strtol(argv[1], NULL, 10); 110 | const char* opt_path = argv[2]; 111 | if (inject(opt_pid, opt_path)) { 112 | klog(LOG_TAG, "inject failed\n"); 113 | return -1; 114 | } 115 | 116 | klog(LOG_TAG, "inject success\n"); 117 | return 0; 118 | } 119 | -------------------------------------------------------------------------------- /ndk.cmake: -------------------------------------------------------------------------------- 1 | set(NDK_VERSION 26.2.11394342) 2 | set(ANDROID_ARM_MODE arm) 3 | set(ANDROID_ABI "arm64-v8a") 4 | set(ANDROID_PLATFORM 23) 5 | 6 | set(ANDROID_SDK_ROOT "$ENV{ANDROID_SDK_ROOT}") 7 | if ("${ANDROID_SDK_ROOT}" STREQUAL "") 8 | if (WIN32) 9 | STRING(REGEX REPLACE "\\\\" "/" USERPROFILE $ENV{USERPROFILE}) 10 | set(PROGRAM_LIBRARY ${USERPROFILE}/AppData/Local) 11 | elseif (APPLE) 12 | set(PROGRAM_LIBRARY ~/Library) 13 | endif () 14 | set(ANDROID_SDK_ROOT ${PROGRAM_LIBRARY}/Android/Sdk) 15 | if (NOT EXISTS ${ANDROID_SDK_ROOT}) 16 | message(FATAL_ERROR "Please set ANDROID_SDK_ROOT environment variable") 17 | endif () 18 | endif () 19 | 20 | set(NDK ${ANDROID_SDK_ROOT}/ndk/${NDK_VERSION}) 21 | if (NOT EXISTS ${NDK}) 22 | message(FATAL_ERROR "NDK version ${NDK_VERSION} does not exist") 23 | endif () 24 | set(CMAKE_TOOLCHAIN_FILE ${NDK}/build/cmake/android.toolchain.cmake) 25 | -------------------------------------------------------------------------------- /package/.gitignore: -------------------------------------------------------------------------------- 1 | * 2 | !*/ 3 | !.gitignore 4 | !META-INF/** 5 | !customize.sh 6 | !module.prop 7 | !post-fs-data.sh 8 | !sepolicy.rule 9 | -------------------------------------------------------------------------------- /package/META-INF/com/google/android/update-binary: -------------------------------------------------------------------------------- 1 | #!/sbin/sh 2 | 3 | ################# 4 | # Initialization 5 | ################# 6 | 7 | umask 022 8 | 9 | # echo before loading util_functions 10 | ui_print() { echo "$1"; } 11 | 12 | require_new_magisk() { 13 | ui_print "*******************************" 14 | ui_print " Please install Magisk v20.4+! " 15 | ui_print "*******************************" 16 | exit 1 17 | } 18 | 19 | ######################### 20 | # Load util_functions.sh 21 | ######################### 22 | 23 | OUTFD=$2 24 | ZIPFILE=$3 25 | 26 | mount /data 2>/dev/null 27 | 28 | [ -f /data/adb/magisk/util_functions.sh ] || require_new_magisk 29 | . /data/adb/magisk/util_functions.sh 30 | [ $MAGISK_VER_CODE -lt 20400 ] && require_new_magisk 31 | 32 | install_module 33 | exit 0 34 | -------------------------------------------------------------------------------- /package/META-INF/com/google/android/updater-script: -------------------------------------------------------------------------------- 1 | #MAGISK -------------------------------------------------------------------------------- /package/customize.sh: -------------------------------------------------------------------------------- 1 | #!/bin/sh 2 | set_perm_recursive "$MODPATH/bin" 0 0 0755 0755 3 | set_perm_recursive "$MODPATH/lib64" 0 0 0755 0644 u:object_r:system_file:s0 4 | -------------------------------------------------------------------------------- /package/module.prop: -------------------------------------------------------------------------------- 1 | id=adbex 2 | name=ADBEx 3 | version=2024.05.29 4 | versionCode=202405290 5 | author=shatyuka 6 | description=ADB Extension 7 | -------------------------------------------------------------------------------- /package/post-fs-data.sh: -------------------------------------------------------------------------------- 1 | #!/bin/sh 2 | MODDIR=${0%/*} 3 | cd "$MODDIR" || exit 4 | 5 | ADBEX_PATH=/sbin/adbex 6 | [ -d /sbin ] || ADBEX_PATH=/debug_ramdisk/adbex 7 | 8 | mkdir -p $ADBEX_PATH 9 | cp lib64/libadbex_init.so $ADBEX_PATH 10 | cp lib64/libadbex_adbd.so $ADBEX_PATH 11 | chcon -R u:object_r:system_file:s0 $ADBEX_PATH 12 | ./bin/inject 1 $ADBEX_PATH/libadbex_init.so 13 | -------------------------------------------------------------------------------- /package/sepolicy.rule: -------------------------------------------------------------------------------- 1 | permissive su 2 | permissive adbd 3 | allow init adbd process noatsecure 4 | allow init adbd process2 nosuid_transition 5 | allow system_server su fd use 6 | allow system_server su unix_stream_socket { connectto getattr getopt ioctl read write shutdown } 7 | allow system_server su binder call 8 | allow untrusted_app su unix_stream_socket { connectto getattr getopt ioctl read write shutdown } 9 | allow { surfaceflinger audioserver mediaswcodec mediacodec hwservicemanager netd } su * * 10 | -------------------------------------------------------------------------------- /prop_info.h: -------------------------------------------------------------------------------- 1 | #pragma once 2 | 3 | #include 4 | #include 5 | #include 6 | 7 | #define kLongLegacyErrorBufferSize 56 8 | 9 | typedef struct prop_info { 10 | atomic_uint_least32_t serial; 11 | union { 12 | char value[PROP_VALUE_MAX]; 13 | struct { 14 | char error_message[kLongLegacyErrorBufferSize]; 15 | uint32_t offset; 16 | } long_property; 17 | }; 18 | char name[0]; 19 | } prop_info; 20 | 21 | _Static_assert(sizeof(prop_info) == 96, "sizeof struct prop_info must be 96 bytes"); 22 | -------------------------------------------------------------------------------- /ptrace.c: -------------------------------------------------------------------------------- 1 | #include "ptrace.h" 2 | #include "utils.h" 3 | 4 | #include 5 | #include 6 | #include 7 | #include 8 | #include 9 | #include 10 | 11 | int remote_call(pid_t pid, struct user_regs_struct* regs, uintptr_t func_addr, int argc, const uintptr_t* argv, 12 | uintptr_t return_addr) { 13 | if (argc >= 1) regs->REG_ARG0 = argv[0]; 14 | if (argc >= 2) regs->REG_ARG1 = argv[1]; 15 | if (argc >= 3) regs->REG_ARG2 = argv[2]; 16 | if (argc >= 4) regs->REG_ARG3 = argv[3]; 17 | if (argc >= 5) regs->REG_ARG4 = argv[4]; 18 | if (argc >= 6) regs->REG_ARG5 = argv[5]; 19 | 20 | regs->REG_IP = func_addr; 21 | 22 | #ifdef __x86_64__ 23 | regs->REG_SP -= sizeof(long); 24 | ptrace_write(pid, regs->REG_SP, &return_addr, sizeof(return_addr)); 25 | #elif defined(__aarch64__) 26 | regs->regs[30] = return_addr; 27 | #else 28 | # error "Not supported" 29 | #endif 30 | 31 | if (ptrace_setregs(pid, regs)) return -1; 32 | if (ptrace_continue(pid)) return -1; 33 | if (remote_wait(pid)) return -1; 34 | if (ptrace_getregs(pid, regs)) return -1; 35 | 36 | return 0; 37 | } 38 | 39 | int remote_wait(pid_t pid) { 40 | while (1) { 41 | int status; 42 | pid_t err = waitpid(pid, &status, __WALL); 43 | if (err == -1) { 44 | if (errno == EINTR) continue; 45 | printf("waitpid(%d) failed: %s(%d)\n", pid, strerror(errno), errno); 46 | return -1; 47 | } 48 | if (!WIFSTOPPED(status)) { 49 | printf("target process not stopped\n"); 50 | return -1; 51 | } 52 | return 0; 53 | } 54 | } 55 | 56 | int ptrace_attach(pid_t pid) { 57 | if (ptrace(PTRACE_ATTACH, pid, NULL, NULL) == -1) { 58 | printf("ptrace(PTRACE_ATTACH) failed: %s(%d)\n", strerror(errno), errno); 59 | return -1; 60 | } 61 | return 0; 62 | } 63 | 64 | int ptrace_detach(pid_t pid) { 65 | if (ptrace(PTRACE_DETACH, pid, NULL, NULL) == -1) { 66 | printf("ptrace(PTRACE_DETACH) failed: %s(%d)\n", strerror(errno), errno); 67 | return -1; 68 | } 69 | return 0; 70 | } 71 | 72 | int ptrace_getregs(pid_t pid, struct user_regs_struct* regs) { 73 | #ifdef __x86_64__ 74 | if (ptrace(PTRACE_GETREGS, pid, NULL, regs) == -1) { 75 | printf("ptrace(PTRACE_GETREGS) failed: %s(%d)\n", strerror(errno), errno); 76 | return -1; 77 | } 78 | #elif defined(__aarch64__) 79 | struct iovec iov; 80 | iov.iov_base = regs; 81 | iov.iov_len = sizeof(struct user_regs_struct); 82 | if (ptrace(PTRACE_GETREGSET, pid, (void*)NT_PRSTATUS, &iov) == -1) { 83 | printf("ptrace(PTRACE_GETREGSET) failed: %s(%d)\n", strerror(errno), errno); 84 | return -1; 85 | } 86 | #endif 87 | return 0; 88 | } 89 | 90 | int ptrace_setregs(pid_t pid, struct user_regs_struct* regs) { 91 | #ifdef __x86_64__ 92 | if (ptrace(PTRACE_SETREGS, pid, NULL, regs) == -1) { 93 | fprintf(stderr, "ptrace(PTRACE_SETREGS) failed: %s(%d)\n", strerror(errno), errno); 94 | return false; 95 | } 96 | #elif defined(__aarch64__) 97 | struct iovec iov; 98 | iov.iov_base = regs; 99 | iov.iov_len = sizeof(*regs); 100 | if (ptrace(PTRACE_SETREGSET, pid, (void*)NT_PRSTATUS, &iov) == -1) { 101 | printf("ptrace(PTRACE_SETREGSET) failed: %s(%d)\n", strerror(errno), errno); 102 | return -1; 103 | } 104 | #endif 105 | return 0; 106 | } 107 | 108 | int ptrace_continue(pid_t pid) { 109 | if (ptrace(PTRACE_CONT, pid, NULL, NULL) == -1) { 110 | printf("ptrace(PTRACE_CONT) failed: %s(%d)\n", strerror(errno), errno); 111 | return -1; 112 | } 113 | return 0; 114 | } 115 | 116 | int ptrace_read(pid_t pid, uintptr_t addr, void* vptr, int len) { 117 | int count = 0; 118 | int i = 0; 119 | long word = 0; 120 | long* ptr = (long*)vptr; 121 | 122 | while (count < len) { 123 | errno = 0; 124 | word = ptrace(PTRACE_PEEKTEXT, pid, addr + count, NULL); 125 | if (unlikely(errno)) { 126 | printf("ptrace(PTRACE_PEEKTEXT) failed: %s(%d)\n", strerror(errno), errno); 127 | return -1; 128 | } 129 | count += sizeof(word); 130 | if (unlikely(count > len)) 131 | memcpy(ptr + i, &word, sizeof(word) - (count - len)); 132 | else 133 | ptr[i++] = word; 134 | } 135 | return 0; 136 | } 137 | 138 | int ptrace_write(pid_t pid, uintptr_t addr, const void* vptr, int len) { 139 | int count = 0; 140 | long word = 0; 141 | 142 | // TODO: 143 | // assert(!(len % sizeof(word))); 144 | 145 | while (count < len) { 146 | memcpy(&word, (const char*)vptr + count, sizeof(word)); 147 | word = ptrace(PTRACE_POKETEXT, pid, addr + count, word); 148 | if (unlikely(word == -1)) { 149 | printf("ptrace(PTRACE_POKETEXT) failed: %s(%d)\n", strerror(errno), errno); 150 | return -1; 151 | } 152 | count += sizeof(word); 153 | } 154 | return 0; 155 | } 156 | -------------------------------------------------------------------------------- /ptrace.h: -------------------------------------------------------------------------------- 1 | #pragma once 2 | 3 | #include 4 | #include 5 | #include 6 | 7 | #ifdef __x86_64__ 8 | # define REG_RET rax 9 | # define REG_ARG0 rdi 10 | # define REG_ARG1 rsi 11 | # define REG_ARG2 rdx 12 | # define REG_ARG3 rcx 13 | # define REG_ARG4 r8 14 | # define REG_ARG5 r9 15 | # define REG_IP rip 16 | # define REG_SP rsp 17 | #elif defined(__aarch64__) 18 | # define REG_RET regs[0] 19 | # define REG_ARG0 regs[0] 20 | # define REG_ARG1 regs[1] 21 | # define REG_ARG2 regs[2] 22 | # define REG_ARG3 regs[3] 23 | # define REG_ARG4 regs[4] 24 | # define REG_ARG5 regs[5] 25 | # define REG_IP pc 26 | # define REG_SP sp 27 | #else 28 | # error "Not supported" 29 | #endif 30 | 31 | #define ALIGN_UP(x, align) ((x + (align - 1)) & ~(align - 1)) 32 | 33 | int remote_call(pid_t pid, struct user_regs_struct* regs, uintptr_t func_addr, int argc, const uintptr_t* argv, 34 | uintptr_t return_addr); 35 | int remote_wait(pid_t pid); 36 | 37 | int ptrace_attach(pid_t pid); 38 | int ptrace_detach(pid_t pid); 39 | int ptrace_getregs(pid_t pid, struct user_regs_struct* regs); 40 | int ptrace_setregs(pid_t pid, struct user_regs_struct* regs); 41 | int ptrace_continue(pid_t pid); 42 | int ptrace_read(pid_t pid, uintptr_t addr, void* vptr, int len); 43 | int ptrace_write(pid_t pid, uintptr_t addr, const void* vptr, int len); 44 | -------------------------------------------------------------------------------- /utils.c: -------------------------------------------------------------------------------- 1 | // 2 | // Created by shaty uka on 2024/3/20. 3 | // 4 | 5 | #include "utils.h" 6 | #include 7 | #include 8 | #include 9 | 10 | uintptr_t get_module_base(pid_t pid, const char* module) { 11 | char filename[32]; 12 | char line[1024]; 13 | sprintf(filename, "/proc/%d/maps", pid); 14 | FILE* fp = fopen(filename, "r"); 15 | if (fp == NULL) return -1; 16 | 17 | uintptr_t addr = 0; 18 | char perms[5]; 19 | while (fgets(line, sizeof(line), fp)) { 20 | sscanf(line, "%lx-%*lx %s %*s %*s %*d", &addr, perms); // NOLINT(*-err34-c) 21 | if (strstr(line, module)) { 22 | break; 23 | } 24 | } 25 | 26 | fclose(fp); 27 | return addr; 28 | } 29 | 30 | size_t klog(const char* tag, const char* fmt, ...) { 31 | static int kmsg_fd = -1; 32 | if (unlikely(kmsg_fd == -1)) { 33 | kmsg_fd = open("/dev/kmsg", O_WRONLY | O_CLOEXEC); 34 | if (kmsg_fd == -1) return -1; 35 | } 36 | 37 | char buf[1024]; 38 | size_t offset = 0; 39 | offset += strlcpy(buf, tag, sizeof(buf)); 40 | offset += strlcpy(buf + offset, " ", sizeof(buf) - offset); 41 | va_list ap; 42 | va_start(ap, fmt); 43 | offset += vsnprintf(buf + offset, sizeof(buf) - offset, fmt, ap); 44 | va_end(ap); 45 | write(kmsg_fd, buf, offset); 46 | return offset; 47 | } 48 | -------------------------------------------------------------------------------- /utils.h: -------------------------------------------------------------------------------- 1 | #pragma once 2 | #include 3 | 4 | #define likely(x) __builtin_expect(!!(x), 1) 5 | #define unlikely(x) __builtin_expect(!!(x), 0) 6 | 7 | #define UNUSED __attribute__((unused)) 8 | #define CONSTRUCTOR __attribute__((constructor)) 9 | #define EXPORT __attribute__((visibility("default"), unused)) 10 | 11 | uintptr_t get_module_base(pid_t pid, const char* module); 12 | size_t klog(const char* tag, const char* fmt, ...) __attribute__((format(printf, 2, 3))); 13 | --------------------------------------------------------------------------------