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Add Protobuf support to resetprop

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This commit is contained in:
topjohnwu 2018-04-28 20:22:42 +08:00
parent fc706dcb40
commit fb491cfdcf
10 changed files with 400 additions and 124 deletions
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3
.gitmodules vendored
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@ -25,3 +25,6 @@
[submodule "xz"]
path = native/jni/external/xz
url = https://github.com/xz-mirror/xz.git
[submodule "nanopb"]
path = native/jni/external/nanopb
url = https://github.com/nanopb/nanopb.git

9
native/jni/Android.mk
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@ -9,6 +9,7 @@ LIBLZMA := $(EXT_PATH)/xz/src/liblzma/api
LIBLZ4 := $(EXT_PATH)/lz4/lib
LIBBZ2 := $(EXT_PATH)/bzip2
LIBFDT := $(EXT_PATH)/dtc/libfdt
LIBNANOPB := $(EXT_PATH)/nanopb
UTIL_SRC := utils/cpio.c \
utils/file.c \
utils/img.c \
@ -28,12 +29,13 @@ ifneq "$(or $(PRECOMPILE), $(GRADLE))" ""
include $(CLEAR_VARS)
LOCAL_MODULE := magisk
LOCAL_SHARED_LIBRARIES := libsqlite libselinux
LOCAL_STATIC_LIBRARIES := libnanopb
LOCAL_C_INCLUDES := \
jni/include \
jni/magiskpolicy \
$(EXT_PATH)/include \
$(LIBSELINUX)
$(LIBSELINUX) \
$(LIBNANOPB)
LOCAL_SRC_FILES := \
core/magisk.c \
@ -44,7 +46,8 @@ LOCAL_SRC_FILES := \
magiskhide/magiskhide.c \
magiskhide/proc_monitor.c \
magiskhide/hide_utils.c \
resetprop/resetprop.cpp \
resetprop/persist_props.c \
resetprop/resetprop.c \
resetprop/system_properties.cpp \
su/su.c \
su/activity.c \

10
native/jni/external/Android.mk vendored
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@ -28,6 +28,16 @@ LOCAL_SRC_FILES := \
mincrypt/sha256.c
include $(BUILD_STATIC_LIBRARY)
# libnanopb.a
include $(CLEAR_VARS)
LOCAL_MODULE:= libnanopb
LOCAL_C_INCLUDES := $(LIBNANOPB)
LOCAL_SRC_FILES := \
nanopb/pb_common.c \
nanopb/pb_decode.c \
nanopb/pb_encode.c
include $(BUILD_STATIC_LIBRARY)
# libfdt.a
include $(CLEAR_VARS)
LOCAL_MODULE:= libfdt

1
native/jni/external/nanopb vendored Submodule

@ -0,0 +1 @@
Subproject commit 04cd1f94cc513b4cb3eac924c74039ccc05a944b

7
native/jni/include/magisk.h
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@ -63,13 +63,6 @@ int create_links(const char *bin, const char *path);
int magiskhide_main(int argc, char *argv[]);
int magiskpolicy_main(int argc, char *argv[]);
int su_client_main(int argc, char *argv[]);
#ifdef __cplusplus
extern "C" {
#endif
int resetprop_main(int argc, char *argv[]);
#ifdef __cplusplus
}
#endif
#endif

10
native/jni/include/resetprop.h
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@ -4,10 +4,6 @@
#ifndef _RESETPROP_H_
#define _RESETPROP_H_
#ifdef __cplusplus
extern "C" {
#endif
int prop_exist(const char *name);
int setprop(const char *name, const char *value);
int setprop2(const char *name, const char *value, const int trigger);
@ -16,10 +12,6 @@ char *getprop2(const char *name, int persist);
int deleteprop(const char *name);
int deleteprop2(const char *name, const int persist);
int read_prop_file(const char* filename, const int trigger);
void getprop_all(void (*callback)(const char*, const char*));
#ifdef __cplusplus
}
#endif
void getprop_all(void (*callback)(const char *, const char *, void *), void *cookie);
#endif

4
native/jni/magiskhide/hide_utils.c
View File

@ -56,7 +56,7 @@ void hide_sensitive_props() {
}
}
static void rm_magisk_prop(const char *name, const char *value) {
static void rm_magisk_prop(const char *name, const char *value, void *v) {
if (strstr(name, "magisk")) {
deleteprop2(name, 0);
}
@ -64,7 +64,7 @@ static void rm_magisk_prop(const char *name, const char *value) {
void clean_magisk_props() {
LOGD("hide_utils: Cleaning magisk props\n");
getprop_all(rm_magisk_prop);
getprop_all(rm_magisk_prop, NULL);
}
int add_list(char *proc) {

31
native/jni/resetprop/_resetprop.h Normal file
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@ -0,0 +1,31 @@
/* resetprop.h - Internal struct definitions
*/
#ifndef MAGISK_PROPS_H
#define MAGISK_PROPS_H
#include "system_properties.h"
#include "logging.h"
extern int prop_verbose;
#define PRINT_D(...) { LOGD(__VA_ARGS__); if (prop_verbose) fprintf(stderr, __VA_ARGS__); }
#define PRINT_E(...) { LOGE(__VA_ARGS__); fprintf(stderr, __VA_ARGS__); }
struct prop_t {
char *name;
char value[PROP_VALUE_MAX];
};
struct read_cb_t {
void (*func)(const char *name, const char *value, void *cookie);
void *cookie;
};
char *persist_getprop(const char *name);
void persist_getprop_all(struct read_cb_t *read_cb);
bool persist_deleteprop(const char *name);
void collect_props(const char *name, const char *value, void *prop_list);
#endif //MAGISK_PROPS_H

252
native/jni/resetprop/persist_props.c Normal file
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@ -0,0 +1,252 @@
#include <stdbool.h>
#include <stdio.h>
#include <fcntl.h>
#include <stdlib.h>
#include <unistd.h>
#include <sys/mman.h>
#include <pb.h>
#include <pb_decode.h>
#include <pb_encode.h>
#include "_resetprop.h"
#include "utils.h"
#include "vector.h"
#define PERSISTENT_PROPERTY_DIR "/data/property"
/* ***********************************************************************
* Auto generated header and constant definitions compiled from
* android/platform/system/core/master/init/persistent_properties.proto
* using Nanopb's protoc
* Nanopb: https://github.com/nanopb/nanopb
* ***********************************************************************/
/* Automatically generated nanopb header */
/* Generated by nanopb-0.3.9.1 at Sun Apr 22 14:36:22 2018. */
/* @@protoc_insertion_point(includes) */
#if PB_PROTO_HEADER_VERSION != 30
#error Regenerate this file with the current version of nanopb generator.
#endif
/* Struct definitions */
typedef struct _PersistentProperties {
pb_callback_t properties;
/* @@protoc_insertion_point(struct:PersistentProperties) */
} PersistentProperties;
typedef struct _PersistentProperties_PersistentPropertyRecord {
pb_callback_t name;
bool has_value;
char value[92];
/* @@protoc_insertion_point(struct:PersistentProperties_PersistentPropertyRecord) */
} PersistentProperties_PersistentPropertyRecord;
/* Default values for struct fields */
/* Initializer values for message structs */
#define PersistentProperties_init_default {{{NULL}, NULL}}
#define PersistentProperties_PersistentPropertyRecord_init_default {{{NULL}, NULL}, false, ""}
#define PersistentProperties_init_zero {{{NULL}, NULL}}
#define PersistentProperties_PersistentPropertyRecord_init_zero {{{NULL}, NULL}, false, ""}
/* Field tags (for use in manual encoding/decoding) */
#define PersistentProperties_properties_tag 1
#define PersistentProperties_PersistentPropertyRecord_name_tag 1
#define PersistentProperties_PersistentPropertyRecord_value_tag 2
/* Automatically generated nanopb constant definitions */
/* Generated by nanopb-0.3.9.1 at Sun Apr 22 14:36:22 2018. */
/* Struct field encoding specification for nanopb */
const pb_field_t PersistentProperties_PersistentPropertyRecord_fields[3] = {
PB_FIELD( 1, STRING , OPTIONAL, CALLBACK, FIRST, PersistentProperties_PersistentPropertyRecord, name, name, 0),
PB_FIELD( 2, STRING , OPTIONAL, STATIC , OTHER, PersistentProperties_PersistentPropertyRecord, value, name, 0),
PB_LAST_FIELD
};
const pb_field_t PersistentProperties_fields[2] = {
PB_FIELD( 1, MESSAGE , REPEATED, CALLBACK, FIRST, PersistentProperties, properties, properties, &PersistentProperties_PersistentPropertyRecord_fields),
PB_LAST_FIELD
};
/* Maximum encoded size of messages (where known) */
/* PersistentProperties_size depends on runtime parameters */
/* PersistentProperties_PersistentPropertyRecord_size depends on runtime parameters */
/* Message IDs (where set with "msgid" option) */
#ifdef PB_MSGID
#define PROPS_MESSAGES \
#endif
/* @@protoc_insertion_point(eof) */
/* ***************************
* End of auto generated code
* ***************************/
static bool name_decode(pb_istream_t *stream, const pb_field_t *field, void **arg) {
uint8_t *name = xmalloc(stream->bytes_left + 1);
name[stream->bytes_left] = '\0';
if (!pb_read(stream, name, stream->bytes_left))
return false;
*arg = name;
return true;
}
static bool name_encode(pb_ostream_t *stream, const pb_field_t *field, void * const *arg) {
return pb_encode_tag_for_field(stream, field) && pb_encode_string(stream, *arg, strlen(*arg));
}
static bool prop_decode(pb_istream_t *stream, const pb_field_t *field, void **arg) {
PersistentProperties_PersistentPropertyRecord prop = {};
prop.name.funcs.decode = name_decode;
if (!pb_decode(stream, PersistentProperties_PersistentPropertyRecord_fields, &prop))
return false;
struct read_cb_t *read_cb = *arg;
read_cb->func(prop.name.arg, prop.value, read_cb->cookie);
return true;
}
static bool prop_encode(pb_ostream_t *stream, const pb_field_t *field, void * const *arg) {
PersistentProperties_PersistentPropertyRecord prop = {};
prop.name.funcs.encode = name_encode;
prop.has_value = true;
struct vector *v = *arg;
struct prop_t *e;
vec_for_each(v, e) {
if (e == NULL)
continue;
if (!pb_encode_tag_for_field(stream, field))
return false;
prop.name.arg = e->name;
strcpy(prop.value, e->value);
if (!pb_encode_submessage(stream, PersistentProperties_PersistentPropertyRecord_fields, &prop))
return false;
free(e->name);
free(e);
}
return true;
}
static bool write_callback(pb_ostream_t *stream, const uint8_t *buf, size_t count) {
int fd = (intptr_t)stream->state;
return xwrite(fd, buf, count) == count;
}
static pb_ostream_t create_ostream(const char *filename) {
int fd = creat(filename, 0644);
pb_ostream_t o = {&write_callback, (void*)(intptr_t)fd, SIZE_MAX, 0};
return o;
}
static void pb_getprop_cb(const char *name, const char *value, void *v) {
struct prop_t *prop = v;
if (prop->name && strcmp(name, prop->name) == 0) {
strcpy(prop->value, value);
prop->name = NULL;
}
}
void persist_getprop_all(struct read_cb_t *read_cb) {
if (access(PERSISTENT_PROPERTY_DIR "/persistent_properties", R_OK) == 0) {
PRINT_D("resetprop: decode with protobuf from [" PERSISTENT_PROPERTY_DIR "/persistent_properties]\n");
PersistentProperties props = PersistentProperties_init_zero;
props.properties.funcs.decode = prop_decode;
props.properties.arg = read_cb;
uint8_t *buf;
size_t size;
mmap_ro(PERSISTENT_PROPERTY_DIR "/persistent_properties", (void **) &buf, &size);
pb_istream_t stream = pb_istream_from_buffer(buf, size);
pb_decode(&stream, PersistentProperties_fields, &props);
munmap(buf, size);
} else {
DIR *dir = opendir(PERSISTENT_PROPERTY_DIR);
struct dirent *entry;
while ((entry = readdir(dir))) {
if (strcmp(entry->d_name, ".") == 0 || strcmp(entry->d_name, "..") == 0 )
continue;
char *value = persist_getprop(entry->d_name);
if (value) {
read_cb->func(strdup(entry->d_name), value, read_cb->cookie);
free(value);
}
}
}
}
char *persist_getprop(const char *name) {
struct prop_t prop;
prop.name = (char *) name;
if (access(PERSISTENT_PROPERTY_DIR "/persistent_properties", R_OK) == 0) {
struct read_cb_t read_cb = {
.func = pb_getprop_cb,
.cookie = &prop
};
persist_getprop_all(&read_cb);
if (prop.name)
return NULL;
} else {
// Try to read from file
char path[PATH_MAX];
snprintf(path, sizeof(path), PERSISTENT_PROPERTY_DIR "/%s", name);
int fd = open(path, O_RDONLY | O_CLOEXEC);
if (fd < 0)
return NULL;
PRINT_D("resetprop: read prop from [%s]\n", path);
prop.value[read(fd, prop.value, sizeof(PROP_VALUE_MAX))] = '\0'; // Null terminate the read value
close(fd);
}
return strdup(prop.value);
}
bool persist_deleteprop(const char *name) {
if (access(PERSISTENT_PROPERTY_DIR "/persistent_properties", R_OK) == 0) {
struct vector v;
vec_init(&v);
struct read_cb_t read_cb = {
.func = collect_props,
.cookie = &v
};
persist_getprop_all(&read_cb);
struct prop_t *p;
bool reencode = false;
vec_for_each(&v, p) {
if (strcmp(p->name, name) == 0) {
// Remove the prop from the list
free(p->name);
free(p);
vec_cur(&v) = NULL;
reencode = true;
break;
}
}
if (reencode) {
// Dump the props back
PersistentProperties props = PersistentProperties_init_zero;
pb_ostream_t ostream = create_ostream(PERSISTENT_PROPERTY_DIR "/persistent_properties.tmp");
props.properties.funcs.encode = prop_encode;
props.properties.arg = &v;
PRINT_D("resetprop: encode with protobuf to [" PERSISTENT_PROPERTY_DIR "/persistent_properties.tmp]\n");
if (!pb_encode(&ostream, PersistentProperties_fields, &props))
return false;
clone_attr(PERSISTENT_PROPERTY_DIR "/persistent_properties", PERSISTENT_PROPERTY_DIR "/persistent_properties.tmp");
rename(PERSISTENT_PROPERTY_DIR "/persistent_properties.tmp", PERSISTENT_PROPERTY_DIR "/persistent_properties");
}
vec_destroy(&v);
return reencode;
} else {
char path[PATH_MAX];
snprintf(path, sizeof(path), PERSISTENT_PROPERTY_DIR "/%s", name);
if (unlink(path) == 0) {
PRINT_D("resetprop: unlink [%s]\n", path);
return true;
}
}
return false;
}

197
native/jni/resetprop/resetprop.cpp → native/jni/resetprop/resetprop.c
View File

@ -19,15 +19,11 @@
#include "magisk.h"
#include "resetprop.h"
extern "C" {
#include "_resetprop.h"
#include "vector.h"
}
#include "utils.h"
#define PRINT_D(...) { LOGD(__VA_ARGS__); if (verbose) fprintf(stderr, __VA_ARGS__); }
#define PRINT_E(...) { LOGE(__VA_ARGS__); fprintf(stderr, __VA_ARGS__); }
#define PERSISTENT_PROPERTY_DIR "/data/property"
static int verbose = 0;
int prop_verbose = 0;
static int check_legal_property_name(const char *name) {
int namelen = strlen(name);
@ -83,6 +79,49 @@ static int usage(char* arg0) {
return 1;
}
// The callback passes to __system_property_read_callback2, actually runs the callback in read_cb
static void callback_wrapper(void *read_cb, const char *name, const char *value, uint32_t serial) {
((struct read_cb_t *) read_cb)->func(name, value, ((struct read_cb_t *) read_cb)->cookie);
}
/* **********************************
* Callback functions for read_cb_t
* **********************************/
void collect_props(const char *name, const char *value, void *prop_list) {
struct prop_t *p = (struct prop_t *) xmalloc(sizeof(*p));
p->name = strdup(name);
strcpy(p->value, value);
vec_push_back(prop_list, p);
}
static void collect_unique_props(const char *name, const char *value, void *prop_list) {
struct vector *v = prop_list;
struct prop_t *p;
bool uniq = true;
vec_for_each(v, p) {
if (strcmp(name, p->name) == 0) {
uniq = 0;
break;
}
}
if (uniq)
collect_props(name, value, prop_list);
}
static void store_prop_value(const char *name, const char *value, void *dst) {
strcpy(dst, value);
}
static void prop_foreach_cb(const prop_info* pi, void* read_cb) {
__system_property_read_callback2(pi, callback_wrapper, read_cb);
}
// Comparision function used to sort prop vectors
static int prop_cmp(const void *p1, const void *p2) {
return strcmp(((struct prop_t *) p1)->name, ((struct prop_t *) p2)->name);
}
static int init_resetprop() {
if (__system_properties_init2()) {
PRINT_E("resetprop: Initialize error\n");
@ -91,16 +130,36 @@ static int init_resetprop() {
return 0;
}
static void print_props(int persist) {
struct prop_t *p;
struct vector prop_list;
vec_init(&prop_list);
getprop_all(collect_props, &prop_list);
if (persist) {
struct read_cb_t read_cb = {
.func = collect_unique_props,
.cookie = &prop_list
};
persist_getprop_all(&read_cb);
}
vec_sort(&prop_list, prop_cmp);
vec_for_each(&prop_list, p) {
printf("[%s]: [%s]\n", p->name, p->value);
free(p->name);
free(p);
}
vec_destroy(&prop_list);
}
/* **************************************************
* Implementations of functions in resetprop.h (APIs)
* **************************************************/
int prop_exist(const char *name) {
if (init_resetprop()) return 0;
return __system_property_find2(name) != NULL;
}
static void read_prop_info(void* cookie, const char *name, const char *value, uint32_t serial) {
strcpy((char *) cookie, value);
}
char *getprop(const char *name) {
return getprop2(name, 0);
}
@ -109,103 +168,35 @@ char *getprop(const char *name) {
char *getprop2(const char *name, int persist) {
if (check_legal_property_name(name))
return NULL;
char value[PROP_VALUE_MAX];
if (init_resetprop()) return NULL;
const prop_info *pi = __system_property_find2(name);
if (pi == NULL) {
if (persist && strncmp(name, "persist.", 8) == 0) {
// Try to read from file
char path[PATH_MAX];
snprintf(path, sizeof(path), PERSISTENT_PROPERTY_DIR "/%s", name);
int fd = open(path, O_RDONLY | O_CLOEXEC);
if (fd < 0) goto no_prop;
PRINT_D("resetprop: read prop from [%s]\n", path);
size_t len = read(fd, value, sizeof(value));
value[len] = '\0'; // Null terminate the read value
} else {
no_prop:
char *value = persist_getprop(name);
if (value)
return value;
}
PRINT_D("resetprop: prop [%s] does not exist\n", name);
return NULL;
}
} else {
__system_property_read_callback2(pi, read_prop_info, value);
char value[PROP_VALUE_MAX];
struct read_cb_t read_cb = {
.func = store_prop_value,
.cookie = value
};
__system_property_read_callback2(pi, callback_wrapper, &read_cb);
PRINT_D("resetprop: getprop [%s]: [%s]\n", name, value);
return strdup(value);
}
PRINT_D("resetprop: getprop [%s]: [%s]\n", name, value);
return strdup(value);
}
struct wrapper {
void (*func)(const char *, const char *);
};
static void cb_wrapper(void* cookie, const char *name, const char *value, uint32_t serial) {
((wrapper *) cookie)->func(name, value);
}
static void prop_foreach_cb(const prop_info* pi, void* cookie) {
__system_property_read_callback2(pi, cb_wrapper, cookie);
}
class property {
public:
property(const char *n, const char *v) {
name = strdup(n);
value = strdup(v);
}
~property() {
free((void *)name);
free((void *)value);
}
const char *name;
const char *value;
};
vector prop_list;
static int prop_cmp(const void *p1, const void *p2) {
return strcmp(((property *) p1)->name, ((property *) p2)->name);
}
static void print_all_props_cb(const char *name, const char *value) {
vec_push_back(&prop_list, new property(name, value));
}
static void print_all_props(int persist) {
void *p;
vec_init(&prop_list);
getprop_all(print_all_props_cb);
if (persist) {
// Check all persist props in data
DIR *dir = opendir(PERSISTENT_PROPERTY_DIR);
struct dirent *entry;
while ((entry = readdir(dir))) {
if (strcmp(entry->d_name, ".") == 0 || strcmp(entry->d_name, "..") == 0 )
continue;
int found = 0;
vec_for_each(&prop_list, p) {
if (strcmp(((property *) p)->name, entry->d_name) == 0) {
found = 1;
break;
}
}
if (!found)
vec_push_back(&prop_list, new property(entry->d_name, getprop2(entry->d_name, 1)));
}
}
vec_sort(&prop_list, prop_cmp);
vec_for_each(&prop_list, p) {
printf("[%s]: [%s]\n", ((property *) p)->name, ((property *) p)->value);
delete((property *) p);
}
vec_destroy(&prop_list);
}
void getprop_all(void (*callback)(const char*, const char*)) {
void getprop_all(void (*callback)(const char *, const char *, void *), void *cookie) {
if (init_resetprop()) return;
struct wrapper wrap = {
.func = callback
struct read_cb_t read_cb = {
.func = callback,
.cookie = cookie
};
__system_property_foreach2(prop_foreach_cb, &wrap);
__system_property_foreach2(prop_foreach_cb, &read_cb);
}
int setprop(const char *name, const char *value) {
@ -248,7 +239,7 @@ int deleteprop(const char *name) {
return deleteprop2(name, 1);
}
int deleteprop2(const char *name, const int persist) {
int deleteprop2(const char *name, int persist) {
if (check_legal_property_name(name))
return 1;
if (init_resetprop()) return -1;
@ -256,8 +247,8 @@ int deleteprop2(const char *name, const int persist) {
path[0] = '\0';
PRINT_D("resetprop: deleteprop [%s]\n", name);
if (persist && strncmp(name, "persist.", 8) == 0)
snprintf(path, sizeof(path), PERSISTENT_PROPERTY_DIR "/%s", name);
return __system_property_del(name) && unlink(path);
persist = persist_deleteprop(name);
return __system_property_del(name) && !(persist && strncmp(name, "persist.", 8) == 0);
}
int read_prop_file(const char* filename, const int trigger) {
@ -290,7 +281,7 @@ int read_prop_file(const char* filename, const int trigger) {
}
if (comment) continue;
pch = strchr(line, '=');
// Ignore ivalid formats
// Ignore invalid formats
if ( ((pch == NULL) || (i >= (pch - line))) || (pch >= line + read - 1) ) continue;
// Separate the string
*pch = '\0';
@ -321,7 +312,7 @@ int resetprop_main(int argc, char *argv[]) {
goto usage;
}
case 'v':
verbose = 1;
prop_verbose = 1;
continue;
case 'p':
persist = 1;
@ -344,7 +335,7 @@ int resetprop_main(int argc, char *argv[]) {
switch (argc) {
case 0:
print_all_props(persist);
print_props(persist);
return 0;
case 1:
prop = getprop2(argv[0], persist);