Repository: nevermoe/EHook Branch: master Commit: 58c1acea7727 Files: 18 Total size: 63.0 KB Directory structure: gitextract_6plxykad/ ├── .gitignore ├── LICENSE ├── README.md ├── jni/ │ ├── Android.mk │ ├── Application.mk │ ├── hook.c │ ├── hook.h │ ├── inject.c │ ├── realinject.c │ ├── relocate.c │ ├── relocate.h │ ├── stalker.c │ └── target.c ├── libs/ │ ├── armeabi-v7a/ │ │ ├── stalker │ │ └── target │ └── x86/ │ ├── stalker │ └── target └── push.cmd ================================================ FILE CONTENTS ================================================ ================================================ FILE: .gitignore ================================================ *.swp *.id0 *.id1 *.id2 *.idb *.nam *.til *.un~ obj/ ================================================ FILE: LICENSE ================================================ GNU GENERAL PUBLIC LICENSE Version 2, June 1991 Copyright (C) 1989, 1991 Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA Everyone is permitted to copy and distribute verbatim copies of this license document, but changing it is not allowed. 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If the program is interactive, make it output a short notice like this when it starts in an interactive mode: Gnomovision version 69, Copyright (C) year name of author Gnomovision comes with ABSOLUTELY NO WARRANTY; for details type `show w'. This is free software, and you are welcome to redistribute it under certain conditions; type `show c' for details. The hypothetical commands `show w' and `show c' should show the appropriate parts of the General Public License. Of course, the commands you use may be called something other than `show w' and `show c'; they could even be mouse-clicks or menu items--whatever suits your program. You should also get your employer (if you work as a programmer) or your school, if any, to sign a "copyright disclaimer" for the program, if necessary. Here is a sample; alter the names: Yoyodyne, Inc., hereby disclaims all copyright interest in the program `Gnomovision' (which makes passes at compilers) written by James Hacker. , 1 April 1989 Ty Coon, President of Vice This General Public License does not permit incorporating your program into proprietary programs. If your program is a subroutine library, you may consider it more useful to permit linking proprietary applications with the library. If this is what you want to do, use the GNU Lesser General Public License instead of this License. ================================================ FILE: README.md ================================================ # EHook A hooking framework for commercial Android emulators ([雷电模拟器](http://www.ldmnq.com/), [NOX](https://jp.bignox.com/), [BlueStacks](https://www.bluestacks.com/ja/index.html#gref)). As you may know, these commercail emulators use x86 (kernel) and arm (user land) mixed-mode method to accelerate the emulation and this makes it difficult to hook the native arm libraries. This emulator hooking framework is intented to solve this problem. # Usage 1. Modify the jni/realinject.c file. You can hook functions both by address or by the function's symbol name: ``` static struct hook_t eph1; static struct hook_t eph_sendto; ... ... /*On BlueStacks*/ //hook_by_addr(&eph1, "arm/libc.so", target_addr, hook_func1); /*Other emulators*/ hook_by_name(&eph_sendto, "nb/libc.so", "sendto", hook_sendto); ``` **Notice:** If you are hooking system libraries like "libc.so", please make sure you are giving the right path of the arm version binary. 2. Run `ndk-build` 3. Push the following 3 binary to android /data/local/tmp directory: `libs/x86/stalker` `libs/x86/libinject.so` `libs/armeabi/librealinject.so` Or just run `push.cmd`. 4. On android, type `./stalker [pid]`. # Notice 1. For NOX emulator, you should use the Android 5.1.1 instead of the default 4.4.2. 2. Also see this repo: [XEHook](https://github.com/nevermoe/XEHook). # acknowledgement Thanks to these 大神s' work. They made my life much easier. https://github.com/zhengmin1989/TheSevenWeapons/tree/master/LiBieGou https://github.com/ele7enxxh/Android-Inline-Hook ================================================ FILE: jni/Android.mk ================================================ LOCAL_PATH := $(call my-dir) include $(CLEAR_VARS) LOCAL_CFLAGS += -fPIE LOCAL_LDFLAGS += -fPIE -pie LOCAL_MODULE := target LOCAL_SRC_FILES := target.c cmd-strip := include $(BUILD_EXECUTABLE) ########################################################### include $(CLEAR_VARS) LOCAL_MODULE := hook #LOCAL_SRC_FILES := hook.c.arm LOCAL_SRC_FILES := hook.c include $(BUILD_STATIC_LIBRARY) ########################################################### include $(CLEAR_VARS) LOCAL_MODULE := relocate LOCAL_SRC_FILES := relocate.c include $(BUILD_STATIC_LIBRARY) ########################################################### include $(CLEAR_VARS) LOCAL_CFLAGS += -fPIE LOCAL_LDFLAGS += -fPIE -pie LOCAL_MODULE := stalker LOCAL_SRC_FILES := stalker.c LOCAL_LDLIBS := -llog LOCAL_STATIC_LIBRARIES := hook include $(BUILD_EXECUTABLE) ########################################################### include $(CLEAR_VARS) LOCAL_DISABLE_FATAL_LINKER_WARNINGS := true LOCAL_MODULE := inject LOCAL_SRC_FILES := inject.c LOCAL_LDLIBS := -llog LOCAL_STATIC_LIBRARIES := hook relocate include $(BUILD_SHARED_LIBRARY) ########################################################### include $(CLEAR_VARS) LOCAL_DISABLE_FATAL_LINKER_WARNINGS := true LOCAL_MODULE := realinject LOCAL_SRC_FILES := realinject.c LOCAL_LDLIBS := -llog LOCAL_STATIC_LIBRARIES := hook relocate include $(BUILD_SHARED_LIBRARY) ================================================ FILE: jni/Application.mk ================================================ APP_ABI := x86 armeabi-v7a # APP_OPTIM := debug ================================================ FILE: jni/hook.c ================================================ #include "hook.h" #include "relocate.h" void get_module_range(pid_t pid, const char* module_name, uint32_t* start_addr, uint32_t* end_addr) { FILE *fp; char *pch; char filename[32]; char line[1024]; *start_addr = 0; if (end_addr) { *end_addr = 0; } if (pid == 0) { snprintf(filename, sizeof(filename), "/proc/self/maps"); } else { snprintf(filename, sizeof(filename), "/proc/%d/maps", pid); } fp = fopen(filename, "r"); if (fp != NULL) { while (fgets(line, sizeof(line), fp)) { //LOGD("line: %s", line); if (strstr(line, module_name)) { pch = strtok(line, "-"); *start_addr = strtoul(pch, NULL, 16); //LOGD("pch start: %s start_addr: %x\n", pch, *start_addr); pch = strtok(NULL, " "); if (end_addr) { *end_addr = strtoul(pch, NULL, 16); //LOGD("pch end: %s end_addr: %x\n", pch, *end_addr); } /* if (*start_addr == 0x8000) { *start_addr -= 0x8000; if (end_addr) *end_addr -= 0x8000; } */ break; } } fclose(fp) ; } } int hook_by_name(struct hook_t *h, char* module_name, const char* func_name, void *hook_func) { int ret = 0; void *handle = dlopen(module_name, RTLD_NOW); void *func_addr = dlsym(handle, func_name); //get module range for self process uint32_t module_start_addr = 0, module_end_addr = 0; get_module_range(0, module_name, &module_start_addr, &module_end_addr); if(module_start_addr == 0 || module_end_addr == 0) { LOGD("HOOK_ERROR_SO_NOT_FOUND: %s\n", module_name); return HOOK_ERROR_SO_NOT_FOUND; } //mprotect ret = mprotect((void*)module_start_addr, module_end_addr - module_start_addr, PROT_READ|PROT_WRITE|PROT_EXEC); if (ret) { LOGD("mprotect failed\n"); return HOOK_ERROR_MPROTECT_FAILED; } h->module_base = module_start_addr; return _hook(h, (unsigned int)func_addr, hook_func); } int hook_by_addr(struct hook_t *h, char* module_name, unsigned int addr, void *hook_func) { int i; uint32_t module_start_addr = 0, module_end_addr = 0; get_module_range(0, module_name, &module_start_addr, &module_end_addr); if(module_start_addr == 0 || module_end_addr == 0) { LOGD("HOOK_ERROR_SO_NOT_FOUND: %s\n", module_name); return HOOK_ERROR_SO_NOT_FOUND; } unsigned int func_addr = module_start_addr + addr; //mprotect int ret = mprotect((void*)module_start_addr, module_end_addr - module_start_addr, PROT_READ|PROT_WRITE|PROT_EXEC); if (ret) { LOGD("mprotect failed\n"); return HOOK_ERROR_MPROTECT_FAILED; } h->module_base = module_start_addr; return _hook(h, (unsigned int)func_addr, hook_func); } static int _hook(struct hook_t *h, unsigned int addr, void *hook_func) { LOGD("[%d] hooking: 0x%x\n", getpid(), addr - h->module_base); h->new_addr = (unsigned int)hook_func; h->target_addr = addr; h->length = TEST_BIT0(h->target_addr) ? 12 : 8; memcpy(h->orig_instructions, (void *) CLEAR_BIT0(h->target_addr), h->length); //modify function entry point if (!TEST_BIT0(h->target_addr)) { //ARM mode LOGD("using ARM mode 0x%lx\n", (unsigned long)hook_func); h->thumb = 0; h->proto = h->trampoline_instructions; ((uint32_t *)h->target_addr)[0] = 0xe51ff004; // LDR pc, [pc, #-4] ((uint32_t *)h->target_addr)[1] = h->new_addr; } else { //thumb mode LOGD("using thumb mode 0x%lx\n", (unsigned long)hook_func); int i = 0; if (CLEAR_BIT0(h->target_addr) % 4 != 0) { ((uint16_t *) CLEAR_BIT0(h->target_addr))[i++] = 0xBF00; // NOP } h->thumb = 1; h->proto = (uint32_t *)SET_BIT0((uint32_t)h->trampoline_instructions); ((uint16_t *) CLEAR_BIT0(h->target_addr))[i++] = 0xF8DF; ((uint16_t *) CLEAR_BIT0(h->target_addr))[i++] = 0xF000; // LDR.W PC, [PC] ((uint16_t *) CLEAR_BIT0(h->target_addr))[i++] = h->new_addr & 0xFFFF; ((uint16_t *) CLEAR_BIT0(h->target_addr))[i++] = h->new_addr >> 16; } hook_cacheflush(CLEAR_BIT0(h->target_addr), CLEAR_BIT0(h->target_addr)+h->length); relocateInstruction(h->target_addr, h->orig_instructions, h->length, h->trampoline_instructions, h->orig_boundaries, h->trampoline_boundaries, &h->count); //addr must align to page (4kb) int ret = mprotect((void*)((int)h->trampoline_instructions & 0xFFFFF000), 0x1000, PROT_READ|PROT_WRITE|PROT_EXEC); if (ret != 0) { LOGD("mprotect failed: %d\ttrampoline_addr: 0x%x\n", ret, (uint32_t)h->trampoline_instructions); ret = HOOK_ERROR_MPROTECT_FAILED; } return ret; } void inline hook_cacheflush(unsigned int begin, unsigned int end) { #if 0 #if defined(__arm__) const int syscall = 0xf0002; __asm __volatile ( "mov r0, %0\n" "mov r1, %1\n" "mov r7, %2\n" "mov r2, #0x0\n" "svc 0x00000000\n" : : "r" (begin), "r" (end), "r" (syscall) : "r0", "r1", "r7" ); #endif #endif } /* void hook_unset_jump(struct hook_t *h) { int i; if (h->thumb) { unsigned int orig = h->orig - 1; for (i = 0; i < sizeof(h->storet); i++) { ((unsigned char*)orig)[i] = h->storet[i]; } } else { for (i = 0; i < sizeof(h->store)/4; i++) ((unsigned int*)h->orig)[i] = h->store[i]; } hook_cacheflush((unsigned int)h->orig, (unsigned int)h->orig+sizeof(h->jumpt)); } */ /* void hook_set_jump(struct hook_t *h) { int i; if (h->thumb) { unsigned int orig = h->orig - 1; for (i = 0; i < sizeof(h->jumpt); i++) ((unsigned char*)orig)[i] = h->jumpt[i]; } else { for (i = 0; i < sizeof(h->jump)/sizeof(unsigned int); i++) ((int*)h->orig)[i] = h->jump[i]; } hook_cacheflush((unsigned int)h->orig, (unsigned int)h->orig+sizeof(h->jumpt)); } */ ================================================ FILE: jni/hook.h ================================================ #ifndef __HOOK_H__ #define __HOOK_H__ #include #include //#include #include #include #include #include #include #include #include #include #include #include #include #if defined(__i386__) #define pt_regs user_regs_struct #endif #define LOG_TAG "MY_HOOK" #define LOGD(fmt, args...) __android_log_print(ANDROID_LOG_DEBUG, LOG_TAG, fmt, ##args) #define LOGF(...) \ {FILE *fp = fopen("/data/local/tmp/hook.log", "a+"); if (fp) {\ fprintf(fp, __VA_ARGS__);\ fclose(fp);}} #define SET_BIT0(addr) (addr | 1) #define CLEAR_BIT0(addr) (addr & 0xFFFFFFFE) #define TEST_BIT0(addr) (addr & 1) #define ORIG_INS_SIZE 3 #define TRAMPOLINE_INS_SIZE 10 #define ORIG_BOUND_SIZE 4 #define TRAMPOLINE_BOUND_SIZE 20 struct hook_t { uint32_t target_addr; uint32_t new_addr; uint32_t orig_instructions[ORIG_INS_SIZE]; uint32_t trampoline_instructions[TRAMPOLINE_INS_SIZE]; int orig_boundaries[ORIG_BOUND_SIZE]; int trampoline_boundaries[TRAMPOLINE_BOUND_SIZE]; uint32_t *proto; int count; int length; unsigned int thumb; unsigned int module_base; }; enum hook_status { HOOK_OK = 0, //HOOK_ERROR_NOT_EXECUTABLE, HOOK_ERROR_SO_NOT_FOUND, HOOK_ERROR_MPROTECT_FAILED, HOOK_ERROR_UNKNOWN }; void get_module_range(pid_t pid, const char* module_name, uint32_t* start_addr, uint32_t* end_addr); int hook_by_addr(struct hook_t *h, char* module_name, unsigned int addr, void *hook_func); int hook_by_name(struct hook_t *h, char* module_name, const char* func_name, void *hook_func); static int _hook(struct hook_t *h, unsigned int addr, void *hook_func); void inline hook_cacheflush(unsigned int begin, unsigned int end); void hook_unset_jump(struct hook_t *h); void hook_set_jump(struct hook_t *h); #endif ================================================ FILE: jni/inject.c ================================================ #include "hook.h" #include typedef void *native_load_library(void *handle, const char *symbol); typedef void *native_bridge_get_trampoline(void *handle, const char *symbol_name, const char* shorty, uint32_t length); typedef void* dvm2_hd_dlopen(const char* filename, int flag); typedef int real_init_func(char * str); void load_real_lib_bluestacks() { void* dvm2hdDlopen = 0, *librealinject = 0, *lib3btrans = 0; lib3btrans = dlopen("/system/lib/lib3btrans.so", RTLD_NOW); LOGD("lib3btrans.so handler addr is %p\n", lib3btrans); dvm2hdDlopen = dlsym(lib3btrans, "dvm2hdDlopen"); LOGD("dvm2hdDlopen addr is %p\n", dvm2hdDlopen); librealinject = ((dvm2_hd_dlopen*)dvm2hdDlopen)("/data/local/tmp/librealinject.so", RTLD_NOW); LOGD("librealinject.so handler addr is %p\n", librealinject); } void load_real_lib_4_4_2() { void* dvm2hdDlopen = 0, *librealinject = 0, *libhoudini = 0; libhoudini = dlopen("/system/lib/libhoudini.so", RTLD_NOW); LOGD("libhoudini.so handler addr is %p\n", libhoudini); dvm2hdDlopen = dlsym(libhoudini, "dvm2hdDlopen"); LOGD("dvm2hdDlopen addr is %p\n", dvm2hdDlopen); librealinject = ((dvm2_hd_dlopen*)dvm2hdDlopen)("/data/local/tmp/librealinject.so", RTLD_NOW); LOGD("librealinject.so handler addr is %p\n", librealinject); } void load_real_lib_5_5_1() { void* libnativebridge = 0, *NativeBridgeLoadLibrary = 0, *librealinject = 0; libnativebridge = dlopen("/system/lib/libnativebridge.so", RTLD_NOW); LOGD("libnativebridge.so handler addr is %p\n", libnativebridge); NativeBridgeLoadLibrary = dlsym(libnativebridge, "_ZN7android23NativeBridgeLoadLibraryEPKci"); LOGD("NativeBridgeLoadLibrary addr is %p\n", NativeBridgeLoadLibrary); librealinject = ((native_load_library*)NativeBridgeLoadLibrary)("/data/local/tmp/librealinject.so", RTLD_NOW); LOGD("librealinject.so handler addr is %p\n", librealinject); #if 0 void *NativeBridgeGetTrampoline = 0, *RealInitFunc = 0; NativeBridgeGetTrampoline = dlsym(libnativebridge, "_ZN7android25NativeBridgeGetTrampolineEPvPKcS2_j"); LOGD("NativeBridgeGetTrampoline addr is %p\n", NativeBridgeGetTrampoline); RealInitFunc = ((native_bridge_get_trampoline*)NativeBridgeGetTrampoline)(librealinject, "real_init_func", 0, 0); LOGD("RealInitFunc addr is %p\n", RealInitFunc); ((real_init_func*)RealInitFunc)("HelloWorld"); #endif } int init_func(char * str){ LOGD("%s, hook in pid = %d\n", str, getpid()); char* nb_file = "/system/lib/libnativebridge.so"; char* dvm_file = "/system/lib/libdvm.so"; char* btrans_file = "/system/lib/lib3btrans.so"; if( access(nb_file, F_OK) != -1 ) { // native bridge exists, Android 5.5.1 load_real_lib_5_5_1(); } else if ( access(btrans_file, F_OK) != -1){ // BlueStacks load_real_lib_bluestacks(); } else { //dvm_file exsits //Android 4.4.2, maybe NOX load_real_lib_4_4_2(); } LOGD("init_func ended"); return 0; } ================================================ FILE: jni/realinject.c ================================================ #include "hook.h" #include static struct hook_t eph; int hook_battleEnd(int p1, int p2) { int (*orig_func)(int p1, int p2); orig_func = (void*)eph.proto; LOGD("hooking: 0x%x\n", (unsigned int)(eph.target_addr-eph.module_base)); p2 = 1; int ret = orig_func(p1, p2); return ret; } static void real_init_func() __attribute__((constructor)); void real_init_func() { #if 0 LOGD("real_init_func called\n"); long target_addr = 0; target_addr = 0x590f0;//sendto /*Bluestacks*/ //hook_by_addr(&eph_sendto, "arm/libc.so", target_addr, hook_sendto); //hook_by_name(&eph_recvfrom, "arm/libc.so", "recvfrom", hook_recvfrom); /*Other emulators*/ hook_by_addr(&eph_sendto, "nb/libc.so", target_addr, hook_sendto); hook_by_name(&eph_recvfrom, "nb/libc.so", "recvfrom", hook_recvfrom); LOGD("real_init_func ended\n"); #endif LOGD("real_init_func called\n"); long target_addr = 0; target_addr = 0x177335; hook_by_addr(&eph, "libcocos2dcpp.so", target_addr, hook_battleEnd); LOGD("real_init_func ended\n"); } ================================================ FILE: jni/relocate.c ================================================ /* relocate instruction author: ele7enxxh mail: ele7enxxh@qq.com website: ele7enxxh.com modified time: 2016-10-17 created time: 2015-01-17 */ #include "relocate.h" #include #define ALIGN_PC(pc) (pc & 0xFFFFFFFC) #define LOG_TAG "MY_HOOK" #define LOGD(fmt, args...) __android_log_print(ANDROID_LOG_DEBUG, LOG_TAG, fmt, ##args) enum INSTRUCTION_TYPE { // B