Magisk/native/jni/core/db.cpp

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#include <stdlib.h>
#include <stdio.h>
#include <time.h>
#include <string.h>
#include <unistd.h>
#include <sys/stat.h>
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#include <magisk.h>
#include <db.h>
#include <daemon.h>
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#define DB_VERSION 7
static sqlite3 *mDB = nullptr;
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db_strings::db_strings() {
memset(data, 0, sizeof(data));
}
char *db_strings::operator[](const char *key) {
return data[getKeyIdx(key)];
}
const char *db_strings::operator[](const char *key) const {
return data[getKeyIdx(key)];
}
char *db_strings::operator[](const int idx) {
return data[idx];
}
const char *db_strings::operator[](const int idx) const {
return data[idx];
}
int db_strings::getKeyIdx(const char *key) const {
int idx = DB_STRING_NUM;
for (int i = 0; i < DB_STRING_NUM; ++i) {
if (strcmp(key, DB_STRING_KEYS[i]) == 0)
idx = i;
}
return idx;
}
db_settings::db_settings() : data {
ROOT_ACCESS_APPS_AND_ADB,
MULTIUSER_MODE_OWNER_ONLY,
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NAMESPACE_MODE_REQUESTER,
1
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} {}
int &db_settings::operator[](const int idx) {
return data[idx];
}
const int &db_settings::operator[](const int idx) const {
return data[idx];
}
int &db_settings::operator[](const char *key) {
return data[getKeyIdx(key)];
}
const int &db_settings::operator[](const char *key) const {
return data[getKeyIdx(key)];
}
int db_settings::getKeyIdx(const char *key) const {
int idx = DB_SETTINGS_NUM;
for (int i = 0; i < DB_SETTINGS_NUM; ++i) {
if (strcmp(key, DB_SETTING_KEYS[i]) == 0)
idx = i;
}
return idx;
}
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static int ver_cb(void *ver, int, char **data, char **) {
*((int *) ver) = atoi(data[0]);
return 0;
}
#define err_ret(e) if (e) return e;
static char *open_and_init_db(sqlite3 *&db) {
int ret = sqlite3_open_v2(MAGISKDB, &db,
SQLITE_OPEN_READWRITE | SQLITE_OPEN_CREATE | SQLITE_OPEN_FULLMUTEX, nullptr);
if (ret)
return strdup(sqlite3_errmsg(db));
int ver, upgrade = 0;
char *err;
sqlite3_exec(db, "PRAGMA user_version", ver_cb, &ver, &err);
err_ret(err);
if (ver > DB_VERSION) {
// Don't support downgrading database
sqlite3_close(db);
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return nullptr;
}
if (ver < 3) {
// Policies
sqlite3_exec(db,
"CREATE TABLE IF NOT EXISTS policies "
"(uid INT, package_name TEXT, policy INT, until INT, "
"logging INT, notification INT, PRIMARY KEY(uid))",
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nullptr, nullptr, &err);
err_ret(err);
// Logs
sqlite3_exec(db,
"CREATE TABLE IF NOT EXISTS logs "
"(from_uid INT, package_name TEXT, app_name TEXT, from_pid INT, "
"to_uid INT, action INT, time INT, command TEXT)",
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nullptr, nullptr, &err);
err_ret(err);
// Settings
sqlite3_exec(db,
"CREATE TABLE IF NOT EXISTS settings "
"(key TEXT, value INT, PRIMARY KEY(key))",
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nullptr, nullptr, &err);
err_ret(err);
ver = 3;
upgrade = 1;
}
if (ver == 3) {
// Strings
sqlite3_exec(db,
"CREATE TABLE IF NOT EXISTS strings "
"(key TEXT, value TEXT, PRIMARY KEY(key))",
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nullptr, nullptr, &err);
err_ret(err);
ver = 4;
upgrade = 1;
}
if (ver == 4) {
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sqlite3_exec(db, "UPDATE policies SET uid=uid%100000", nullptr, nullptr, &err);
err_ret(err);
/* Skip version 5 */
ver = 6;
upgrade = 1;
}
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if (ver == 5 || ver == 6) {
// Hide list
sqlite3_exec(db,
"CREATE TABLE IF NOT EXISTS hidelist "
"(process TEXT, PRIMARY KEY(process))",
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nullptr, nullptr, &err);
err_ret(err);
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ver = 7;
upgrade =1 ;
}
if (upgrade) {
// Set version
char query[32];
sprintf(query, "PRAGMA user_version=%d", ver);
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sqlite3_exec(db, query, nullptr, nullptr, &err);
err_ret(err);
}
return nullptr;
}
char *db_exec(const char *sql, int (*cb)(void *, int, char**, char**), void *v) {
char *err;
if (mDB == nullptr) {
err = open_and_init_db(mDB);
db_err_cmd(err,
// Open fails, remove and reconstruct
unlink(MAGISKDB);
err = open_and_init_db(mDB);
err_ret(err);
);
}
if (mDB) {
sqlite3_exec(mDB, sql, cb, v, &err);
return err;
}
return nullptr;
}
static int settings_cb(void *v, int col_num, char **data, char **col_name) {
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auto &cfg = *(db_settings *) v;
int value = -1;
const char *key = "";
for (int i = 0; i < col_num; ++i) {
if (strcmp(col_name[i], "key") == 0) {
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key = data[i];
} else if (strcmp(col_name[i], "value") == 0) {
value = atoi(data[i]);
}
}
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if (key[0] && value >= 0) {
cfg[key] = value;
LOGD("magiskdb: query %s=[%d]\n", key, value);
}
return 0;
}
int get_db_settings(db_settings *dbs, int key) {
char *err;
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if (key >= 0) {
char query[128];
sprintf(query, "SELECT key, value FROM settings WHERE key='%s'", DB_SETTING_KEYS[key]);
err = db_exec(query, settings_cb, dbs);
} else {
err = db_exec("SELECT key, value FROM settings", settings_cb, dbs);
}
db_err_cmd(err, return 1);
return 0;
}
static int strings_cb(void *v, int col_num, char **data, char **col_name) {
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auto &str = *(db_strings *) v;
const char *key = "", *value = "";
for (int i = 0; i < col_num; ++i) {
if (strcmp(col_name[i], "key") == 0) {
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key = data[i];
} else if (strcmp(col_name[i], "value") == 0) {
value = data[i];
}
}
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if (key[0] && value[0]) {
strcpy(str[key], value);
LOGD("magiskdb: query %s=[%s]\n", key, value);
}
return 0;
}
int get_db_strings(db_strings *str, int key) {
char *err;
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if (key >= 0) {
char query[128];
sprintf(query, "SELECT key, value FROM strings WHERE key='%s'", DB_STRING_KEYS[key]);
err = db_exec(query, strings_cb, str);
} else {
err = db_exec("SELECT key, value FROM strings", strings_cb, str);
}
if (err) {
LOGE("sqlite3_exec: %s\n", err);
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sqlite3_free(err);
return 1;
}
return 0;
}
static int policy_cb(void *v, int col_num, char **data, char **col_name) {
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auto su = (su_access *) v;
for (int i = 0; i < col_num; i++) {
if (strcmp(col_name[i], "policy") == 0)
su->policy = (policy_t) atoi(data[i]);
else if (strcmp(col_name[i], "logging") == 0)
su->log = atoi(data[i]);
else if (strcmp(col_name[i], "notification") == 0)
su->notify = atoi(data[i]);
}
LOGD("magiskdb: query policy=[%d] log=[%d] notify=[%d]\n", su->policy, su->log, su->notify);
return 0;
}
int get_uid_policy(int uid, struct su_access *su) {
char query[256], *err;
sprintf(query, "SELECT policy, logging, notification FROM policies "
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"WHERE uid=%d AND (until=0 OR until>%li)", uid, time(nullptr));
err = db_exec(query, policy_cb, su);
db_err_cmd(err, return 1);
return 0;
}
int validate_manager(char *alt_pkg, int userid, struct stat *st) {
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if (st == nullptr) {
struct stat stat;
st = &stat;
}
// Prefer DE storage
const char *base = access("/data/user_de", F_OK) == 0 ? "/data/user_de" : "/data/user";
char app_path[128];
sprintf(app_path, "%s/%d/%s", base, userid, alt_pkg[0] ? alt_pkg : "xxx");
if (stat(app_path, st)) {
// Check the official package name
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sprintf(app_path, "%s/%d/" JAVA_PACKAGE_NAME, base, userid);
if (stat(app_path, st)) {
LOGE("su: cannot find manager");
memset(st, 0, sizeof(*st));
alt_pkg[0] = '\0';
return 1;
} else {
// Switch to official package if exists
strcpy(alt_pkg, JAVA_PACKAGE_NAME);
}
}
return 0;
}
static int print_cb(void *v, int col_num, char **data, char **col_name) {
FILE *out = (FILE *) v;
for (int i = 0; i < col_num; ++i) {
if (i) fprintf(out, "|");
fprintf(out, "%s=%s", col_name[i], data[i]);
}
fprintf(out, "\n");
return 0;
}
void exec_sql(int client) {
char *sql = read_string(client);
FILE *out = fdopen(recv_fd(client), "a");
char *err = db_exec(sql, print_cb, out);
free(sql);
fclose(out);
db_err_cmd(err,
write_int(client, 1);
return;
);
write_int(client, 0);
}