mirror of
https://github.com/topjohnwu/Magisk.git
synced 2024-11-25 19:15:24 +00:00
289 lines
10 KiB
Python
Executable File
289 lines
10 KiB
Python
Executable File
#!/usr/bin/env python3
|
|
|
|
primitives = ['jint', 'jboolean', 'jlong']
|
|
|
|
class JType:
|
|
def __init__(self, cpp, jni):
|
|
self.cpp = cpp
|
|
self.jni = jni
|
|
|
|
|
|
class JArray(JType):
|
|
def __init__(self, type):
|
|
if type.cpp in primitives:
|
|
name = type.cpp + 'Array'
|
|
else:
|
|
name = 'jobjectArray'
|
|
super().__init__(name, '[' + type.jni)
|
|
|
|
|
|
class Argument:
|
|
def __init__(self, name, type, set_arg = False):
|
|
self.name = name
|
|
self.type = type
|
|
self.set_arg = set_arg
|
|
|
|
def cpp(self):
|
|
return f'{self.type.cpp} {self.name}'
|
|
|
|
# Args we don't care, give it an auto generated name
|
|
class Anon(Argument):
|
|
cnt = 0
|
|
def __init__(self, type):
|
|
super().__init__(f'_{Anon.cnt}', type)
|
|
Anon.cnt += 1
|
|
|
|
class Return:
|
|
def __init__(self, value, type):
|
|
self.value = value
|
|
self.type = type
|
|
|
|
class Method:
|
|
def __init__(self, name, ret, args):
|
|
self.name = name
|
|
self.ret = ret
|
|
self.args = args
|
|
|
|
def cpp(self):
|
|
return ', '.join(map(lambda x: x.cpp(), self.args))
|
|
|
|
def name_list(self):
|
|
return ', '.join(map(lambda x: x.name, self.args))
|
|
|
|
def jni(self):
|
|
args = ''.join(map(lambda x: x.type.jni, self.args))
|
|
return f'({args}){self.ret.type.jni}'
|
|
|
|
def body(self):
|
|
return ''
|
|
|
|
class JNIHook(Method):
|
|
def __init__(self, ver, ret, args):
|
|
name = f'{self.base_name()}_{ver}'
|
|
super().__init__(name, ret, args)
|
|
|
|
def base_name(self):
|
|
return ''
|
|
|
|
def orig_method(self):
|
|
return f'reinterpret_cast<decltype(&{self.name})>({self.base_name()}_orig)'
|
|
|
|
def ind(i):
|
|
return '\n' + ' ' * i
|
|
|
|
# Common types
|
|
jint = JType('jint', 'I')
|
|
jintArray = JArray(jint)
|
|
jstring = JType('jstring', 'Ljava/lang/String;')
|
|
jboolean = JType('jboolean', 'Z')
|
|
jlong = JType('jlong', 'J')
|
|
void = JType('void', 'V')
|
|
|
|
class ForkAndSpec(JNIHook):
|
|
def __init__(self, ver, args):
|
|
super().__init__(ver, Return('ctx.pid', jint), args)
|
|
|
|
def base_name(self):
|
|
return 'nativeForkAndSpecialize'
|
|
|
|
def init_args(self):
|
|
return 'AppSpecializeArgsImpl args(uid, gid, gids, runtime_flags, mount_external, se_info, nice_name, instruction_set, app_data_dir);'
|
|
|
|
def body(self):
|
|
decl = ''
|
|
decl += ind(1) + self.init_args()
|
|
for a in self.args:
|
|
if a.set_arg:
|
|
decl += ind(1) + f'args.{a.name} = &{a.name};'
|
|
decl += ind(1) + 'HookContext ctx;'
|
|
decl += ind(1) + 'ctx.env = env;'
|
|
decl += ind(1) + 'ctx.raw_args = &args;'
|
|
decl += ind(1) + f'ctx.{self.base_name()}_pre();'
|
|
decl += ind(1) + self.orig_method() + '('
|
|
decl += ind(2) + f'env, clazz, {self.name_list()}'
|
|
decl += ind(1) + ');'
|
|
decl += ind(1) + f'ctx.{self.base_name()}_post();'
|
|
return decl
|
|
|
|
class SpecApp(ForkAndSpec):
|
|
def __init__(self, ver, args):
|
|
super().__init__(ver, args)
|
|
self.ret = Return('', void)
|
|
|
|
def base_name(self):
|
|
return 'nativeSpecializeAppProcess'
|
|
|
|
class ForkServer(ForkAndSpec):
|
|
def base_name(self):
|
|
return 'nativeForkSystemServer'
|
|
|
|
def init_args(self):
|
|
return 'ServerSpecializeArgsImpl args(uid, gid, gids, runtime_flags, permitted_capabilities, effective_capabilities);'
|
|
|
|
# Common args
|
|
uid = Argument('uid', jint)
|
|
gid = Argument('gid', jint)
|
|
gids = Argument('gids', jintArray)
|
|
runtime_flags = Argument('runtime_flags', jint)
|
|
rlimits = Argument('rlimits', JArray(jintArray))
|
|
mount_external = Argument('mount_external', jint)
|
|
se_info = Argument('se_info', jstring)
|
|
nice_name = Argument('nice_name', jstring)
|
|
fds_to_close = Argument('fds_to_close', jintArray)
|
|
instruction_set = Argument('instruction_set', jstring)
|
|
app_data_dir = Argument('app_data_dir', jstring)
|
|
|
|
# o
|
|
fds_to_ignore = Argument('fds_to_ignore', jintArray)
|
|
|
|
# p
|
|
is_child_zygote = Argument('is_child_zygote', jboolean, True)
|
|
|
|
# q_alt
|
|
is_top_app = Argument('is_top_app', jboolean, True)
|
|
|
|
# r
|
|
pkg_data_info_list = Argument('pkg_data_info_list', JArray(jstring), True)
|
|
whitelisted_data_info_list = Argument('whitelisted_data_info_list', JArray(jstring), True)
|
|
mount_data_dirs = Argument('mount_data_dirs', jboolean, True)
|
|
mount_storage_dirs = Argument('mount_storage_dirs', jboolean, True)
|
|
|
|
# server
|
|
permitted_capabilities = Argument('permitted_capabilities', jlong)
|
|
effective_capabilities = Argument('effective_capabilities', jlong)
|
|
|
|
# Method definitions
|
|
fas_l = ForkAndSpec('l', [uid, gid, gids, runtime_flags, rlimits, mount_external,
|
|
se_info, nice_name, fds_to_close, instruction_set, app_data_dir])
|
|
|
|
fas_o = ForkAndSpec('o', [uid, gid, gids, runtime_flags, rlimits, mount_external,
|
|
se_info, nice_name, fds_to_close, fds_to_ignore, instruction_set, app_data_dir])
|
|
|
|
fas_p = ForkAndSpec('p', [uid, gid, gids, runtime_flags, rlimits, mount_external, se_info,
|
|
nice_name, fds_to_close, fds_to_ignore, is_child_zygote, instruction_set, app_data_dir])
|
|
|
|
fas_q_alt = ForkAndSpec('q_alt', [uid, gid, gids, runtime_flags, rlimits, mount_external, se_info,
|
|
nice_name, fds_to_close, fds_to_ignore, is_child_zygote, instruction_set, app_data_dir, is_top_app])
|
|
|
|
fas_r = ForkAndSpec('r', [uid, gid, gids, runtime_flags, rlimits, mount_external, se_info,
|
|
nice_name, fds_to_close, fds_to_ignore, is_child_zygote, instruction_set, app_data_dir, is_top_app,
|
|
pkg_data_info_list, whitelisted_data_info_list, mount_data_dirs, mount_storage_dirs])
|
|
|
|
fas_samsung_m = ForkAndSpec('samsung_m', [uid, gid, gids, runtime_flags, rlimits, mount_external,
|
|
se_info, Anon(jint), Anon(jint), nice_name, fds_to_close, instruction_set, app_data_dir])
|
|
|
|
fas_samsung_n = ForkAndSpec('samsung_n', [uid, gid, gids, runtime_flags, rlimits, mount_external,
|
|
se_info, Anon(jint), Anon(jint), nice_name, fds_to_close, instruction_set, app_data_dir, Anon(jint)])
|
|
|
|
fas_samsung_o = ForkAndSpec('samsung_o', [uid, gid, gids, runtime_flags, rlimits, mount_external,
|
|
se_info, Anon(jint), Anon(jint), nice_name, fds_to_close, fds_to_ignore, instruction_set, app_data_dir])
|
|
|
|
fas_samsung_p = ForkAndSpec('samsung_p', [uid, gid, gids, runtime_flags, rlimits, mount_external,
|
|
se_info, Anon(jint), Anon(jint), nice_name, fds_to_close, fds_to_ignore, is_child_zygote,
|
|
instruction_set, app_data_dir])
|
|
|
|
spec_q = SpecApp('q', [uid, gid, gids, runtime_flags, rlimits, mount_external, se_info,
|
|
nice_name, is_child_zygote, instruction_set, app_data_dir])
|
|
|
|
spec_q_alt = SpecApp('q_alt', [uid, gid, gids, runtime_flags, rlimits, mount_external, se_info,
|
|
nice_name, is_child_zygote, instruction_set, app_data_dir, is_top_app])
|
|
|
|
spec_r = SpecApp('r', [uid, gid, gids, runtime_flags, rlimits, mount_external, se_info, nice_name,
|
|
is_child_zygote, instruction_set, app_data_dir, is_top_app, pkg_data_info_list,
|
|
whitelisted_data_info_list, mount_data_dirs, mount_storage_dirs])
|
|
|
|
spec_samsung_q = SpecApp('samsung_q', [uid, gid, gids, runtime_flags, rlimits, mount_external,
|
|
se_info, Anon(jint), Anon(jint), nice_name, is_child_zygote, instruction_set, app_data_dir])
|
|
|
|
server_l = ForkServer('l', [uid, gid, gids, runtime_flags, rlimits,
|
|
permitted_capabilities, effective_capabilities])
|
|
|
|
server_samsung_q = ForkServer('samsung_q', [uid, gid, gids, runtime_flags, Anon(jint), Anon(jint), rlimits,
|
|
permitted_capabilities, effective_capabilities])
|
|
|
|
hook_map = {}
|
|
|
|
def gen_jni_def(clz, methods):
|
|
if clz not in hook_map:
|
|
hook_map[clz] = []
|
|
|
|
decl = ''
|
|
for m in methods:
|
|
decl += ind(0) + f'{m.ret.type.cpp} {m.name}(JNIEnv *env, jclass clazz, {m.cpp()}) {{'
|
|
decl += m.body()
|
|
if m.ret.value:
|
|
decl += ind(1) + f'return {m.ret.value};'
|
|
decl += ind(0) + '}'
|
|
|
|
decl += ind(0) + f'const JNINativeMethod {m.base_name()}_methods[] = {{'
|
|
for m in methods:
|
|
decl += ind(1) + '{'
|
|
decl += ind(2) + f'"{m.base_name()}",'
|
|
decl += ind(2) + f'"{m.jni()}",'
|
|
decl += ind(2) + f'(void *) &{m.name}'
|
|
decl += ind(1) + '},'
|
|
decl += ind(0) + '};'
|
|
decl = ind(0) + f'void *{m.base_name()}_orig = nullptr;' + decl
|
|
decl += ind(0) + f'constexpr int {m.base_name()}_methods_num = std::size({m.base_name()}_methods);'
|
|
decl += ind(0)
|
|
|
|
hook_map[clz].append(m.base_name())
|
|
|
|
return decl
|
|
|
|
def gen_jni_hook():
|
|
decl = ''
|
|
decl += ind(0) + 'unique_ptr<JNINativeMethod[]> hookAndSaveJNIMethods(const char *className, const JNINativeMethod *methods, int numMethods) {'
|
|
decl += ind(1) + 'unique_ptr<JNINativeMethod[]> newMethods;'
|
|
decl += ind(1) + 'int clz_id = -1;'
|
|
decl += ind(1) + 'int hook_cnt = 0;'
|
|
decl += ind(1) + 'do {'
|
|
|
|
for index, (clz, methods) in enumerate(hook_map.items()):
|
|
decl += ind(2) + f'if (className == "{clz}"sv) {{'
|
|
decl += ind(3) + f'clz_id = {index};'
|
|
decl += ind(3) + f'hook_cnt = {len(methods)};'
|
|
decl += ind(3) + 'break;'
|
|
decl += ind(2) + '}'
|
|
|
|
decl += ind(1) + '} while (false);'
|
|
|
|
decl += ind(1) + 'if (hook_cnt) {'
|
|
decl += ind(2) + 'newMethods = make_unique<JNINativeMethod[]>(numMethods);'
|
|
decl += ind(2) + 'memcpy(newMethods.get(), methods, sizeof(JNINativeMethod) * numMethods);'
|
|
decl += ind(1) + '}'
|
|
|
|
decl += ind(1) + 'auto &class_map = (*jni_method_map)[className];'
|
|
decl += ind(1) + 'for (int i = 0; i < numMethods; ++i) {'
|
|
|
|
for index, methods in enumerate(hook_map.values()):
|
|
decl += ind(2) + f'if (hook_cnt && clz_id == {index}) {{'
|
|
for m in methods:
|
|
decl += ind(3) + f'HOOK_JNI({m})'
|
|
decl += ind(2) + '}'
|
|
|
|
decl += ind(2) + 'class_map[methods[i].name][methods[i].signature] = methods[i].fnPtr;'
|
|
decl += ind(1) + '}'
|
|
|
|
decl += ind(1) + 'return newMethods;'
|
|
decl += ind(0) + '}'
|
|
return decl
|
|
|
|
with open('jni_hooks.hpp', 'w') as f:
|
|
f.write('// Generated by gen_jni_hooks.py\n')
|
|
|
|
zygote = 'com/android/internal/os/Zygote'
|
|
|
|
methods = [fas_l, fas_o, fas_p, fas_q_alt, fas_r, fas_samsung_m, fas_samsung_n, fas_samsung_o, fas_samsung_p]
|
|
f.write(gen_jni_def(zygote, methods))
|
|
|
|
methods = [spec_q, spec_q_alt, spec_r, spec_samsung_q]
|
|
f.write(gen_jni_def(zygote, methods))
|
|
|
|
methods = [server_l, server_samsung_q]
|
|
f.write(gen_jni_def(zygote, methods))
|
|
|
|
f.write(gen_jni_hook())
|
|
|
|
f.write('\n')
|