Magisk/native/jni/daemon/db.c

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6.2 KiB
C
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#include <stdlib.h>
#include <stdio.h>
#include <time.h>
#include <string.h>
#include <unistd.h>
#include <sys/stat.h>
#include "magisk.h"
#include "db.h"
#define DB_VERSION 6
static int ver_cb(void *v, int col_num, char **data, char **col_name) {
*((int *) v) = atoi(data[0]);
return 0;
}
#define err_abort(err) \
if (err) { \
LOGE("sqlite3_exec: %s\n", err); \
sqlite3_free(err); \
return NULL; \
}
static sqlite3 *open_and_init_db() {
sqlite3 *db;
int ret = sqlite3_open(MAGISKDB, &db);
if (ret) {
LOGE("sqlite3 open failure: %s\n", sqlite3_errstr(ret));
return NULL;
}
int ver, upgrade = 0;
char *err;
sqlite3_exec(db, "PRAGMA user_version", ver_cb, &ver, &err);
err_abort(err);
if (ver > DB_VERSION) {
// Don't support downgrading database
sqlite3_close_v2(db);
return NULL;
}
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))",
NULL, NULL, &err);
err_abort(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)",
NULL, NULL, &err);
err_abort(err);
// Settings
sqlite3_exec(db,
"CREATE TABLE IF NOT EXISTS settings "
"(key TEXT, value INT, PRIMARY KEY(key))",
NULL, NULL, &err);
err_abort(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))",
NULL, NULL, &err);
err_abort(err);
ver = 4;
upgrade = 1;
}
if (ver == 4) {
sqlite3_exec(db, "UPDATE policies SET uid=uid%100000", NULL, NULL, &err);
err_abort(err);
/* Skip version 5 */
ver = 6;
upgrade = 1;
}
if (upgrade) {
// Set version
char query[32];
sprintf(query, "PRAGMA user_version=%d", ver);
sqlite3_exec(db, query, NULL, NULL, &err);
err_abort(err);
}
return db;
}
sqlite3 *get_magiskdb() {
sqlite3 *db = open_and_init_db();
if (db == NULL) {
// Open fails, remove and reconstruct
unlink(MAGISKDB);
db = open_and_init_db();
}
return db;
}
static int settings_cb(void *v, int col_num, char **data, char **col_name) {
struct db_settings *dbs = v;
int key = -1, value;
for (int i = 0; i < col_num; ++i) {
if (strcmp(col_name[i], "key") == 0) {
for (int k = 0; k < DB_SETTINGS_NUM; ++k) {
if (strcmp(data[i], DB_SETTING_KEYS[k]) == 0)
key = k;
}
} else if (strcmp(col_name[i], "value") == 0) {
value = atoi(data[i]);
}
}
if (key >= 0) {
dbs->v[key] = value;
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LOGD("magiskdb: query %s=[%d]\n", DB_SETTING_KEYS[key], value);
}
return 0;
}
int get_db_settings(sqlite3 *db, int key, struct db_settings *dbs) {
if (db == NULL)
return 1;
char *err;
if (key > 0) {
char query[128];
sprintf(query, "SELECT key, value FROM settings WHERE key='%s'", DB_SETTING_KEYS[key]);
sqlite3_exec(db, query, settings_cb, dbs, &err);
} else {
sqlite3_exec(db, "SELECT key, value FROM settings", settings_cb, dbs, &err);
}
if (err) {
LOGE("sqlite3_exec: %s\n", err);
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sqlite3_free(err);
return 1;
}
return 0;
}
static int strings_cb(void *v, int col_num, char **data, char **col_name) {
struct db_strings *dbs = v;
int key = -1;
char *value;
for (int i = 0; i < col_num; ++i) {
if (strcmp(col_name[i], "key") == 0) {
for (int k = 0; k < DB_STRING_NUM; ++k) {
if (strcmp(data[i], DB_STRING_KEYS[k]) == 0)
key = k;
}
} else if (strcmp(col_name[i], "value") == 0) {
value = data[i];
}
}
if (key >= 0) {
strcpy(dbs->s[key], value);
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LOGD("magiskdb: query %s=[%s]\n", DB_STRING_KEYS[key], value);
}
return 0;
}
int get_db_strings(sqlite3 *db, int key, struct db_strings *str) {
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if (db == NULL)
return 1;
char *err;
if (key > 0) {
char query[128];
sprintf(query, "SELECT key, value FROM strings WHERE key='%s'", DB_STRING_KEYS[key]);
sqlite3_exec(db, query, strings_cb, str, &err);
} else {
sqlite3_exec(db, "SELECT key, value FROM strings", strings_cb, str, &err);
}
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) {
struct su_access *su = 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(sqlite3 *db, int uid, struct su_access *su) {
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if (db == NULL)
return 1;
char query[256], *err;
sprintf(query, "SELECT policy, logging, notification FROM policies "
"WHERE uid=%d AND (until=0 OR until>%li)", uid, time(NULL));
sqlite3_exec(db, query, policy_cb, su, &err);
if (err) {
LOGE("sqlite3_exec: %s\n", err);
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sqlite3_free(err);
return 1;
}
return 0;
}
int validate_manager(char *alt_pkg, int userid, struct stat *st) {
if (st == NULL) {
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
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) {
for (int i = 0; i < col_num; ++i) {
if (i) printf("|");
printf("%s=%s", col_name[i], data[i]);
}
printf("\n");
return 0;
}
int exec_sql(const char *sql) {
sqlite3 *db = get_magiskdb();
if (db) {
char *err;
sqlite3_exec(db, sql, print_cb, NULL, &err);
sqlite3_close_v2(db);
if (err) {
fprintf(stderr, "sql_err: %s\n", err);
sqlite3_free(err);
return 1;
}
return 0;
}
return 1;
}