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Restructure the native module

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Consolidate all code into the src folder
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topjohnwu
2022-07-23 13:51:56 -07:00
parent c7c9fb9576
commit b9e89a1a2d
198 changed files with 52 additions and 45 deletions
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199
native/src/sepolicy/rules.cpp Normal file
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#include <base.hpp>
#include "policy.hpp"
using namespace std;
void sepolicy::magisk_rules() {
// Temp suppress warnings
set_log_level_state(LogLevel::Warn, false);
// This indicates API 26+
bool new_rules = exists("untrusted_app_25");
// Prevent anything to change sepolicy except ourselves
deny(ALL, "kernel", "security", "load_policy");
type(SEPOL_PROC_DOMAIN, "domain");
permissive(SEPOL_PROC_DOMAIN); /* Just in case something is missing */
typeattribute(SEPOL_PROC_DOMAIN, "mlstrustedsubject");
typeattribute(SEPOL_PROC_DOMAIN, "netdomain");
typeattribute(SEPOL_PROC_DOMAIN, "bluetoothdomain");
type(SEPOL_FILE_TYPE, "file_type");
typeattribute(SEPOL_FILE_TYPE, "mlstrustedobject");
// Make our root domain unconstrained
allow(SEPOL_PROC_DOMAIN, ALL, ALL, ALL);
// Allow us to do any ioctl
if (impl->db->policyvers >= POLICYDB_VERSION_XPERMS_IOCTL) {
allowxperm(SEPOL_PROC_DOMAIN, ALL, "blk_file", ALL);
allowxperm(SEPOL_PROC_DOMAIN, ALL, "fifo_file", ALL);
allowxperm(SEPOL_PROC_DOMAIN, ALL, "chr_file", ALL);
}
// Create unconstrained file type
allow(ALL, SEPOL_FILE_TYPE, "file", ALL);
allow(ALL, SEPOL_FILE_TYPE, "dir", ALL);
allow(ALL, SEPOL_FILE_TYPE, "fifo_file", ALL);
allow(ALL, SEPOL_FILE_TYPE, "chr_file", ALL);
allow(ALL, SEPOL_FILE_TYPE, "lnk_file", ALL);
allow(ALL, SEPOL_FILE_TYPE, "sock_file", ALL);
if (new_rules) {
// Make client type literally untrusted_app
type(SEPOL_CLIENT_DOMAIN, "domain");
typeattribute(SEPOL_CLIENT_DOMAIN, "coredomain");
typeattribute(SEPOL_CLIENT_DOMAIN, "appdomain");
typeattribute(SEPOL_CLIENT_DOMAIN, "untrusted_app_all");
typeattribute(SEPOL_CLIENT_DOMAIN, "netdomain");
typeattribute(SEPOL_CLIENT_DOMAIN, "bluetoothdomain");
type(SEPOL_EXEC_TYPE, "file_type");
typeattribute(SEPOL_EXEC_TYPE, "exec_type");
// Basic su client needs
allow(SEPOL_CLIENT_DOMAIN, SEPOL_EXEC_TYPE, "file", ALL);
allow(SEPOL_CLIENT_DOMAIN, SEPOL_CLIENT_DOMAIN, ALL, ALL);
const char *pts[]{"devpts", "untrusted_app_devpts", "untrusted_app_25_devpts"};
for (auto type : pts) {
allow(SEPOL_CLIENT_DOMAIN, type, "chr_file", "getattr");
allow(SEPOL_CLIENT_DOMAIN, type, "chr_file", "read");
allow(SEPOL_CLIENT_DOMAIN, type, "chr_file", "write");
allow(SEPOL_CLIENT_DOMAIN, type, "chr_file", "ioctl");
}
// Allow these processes to access MagiskSU
vector<const char *> clients{ "init", "shell", "update_engine", "appdomain" };
for (auto type : clients) {
if (!exists(type))
continue;
// exec magisk
allow(type, SEPOL_EXEC_TYPE, "file", "read");
allow(type, SEPOL_EXEC_TYPE, "file", "open");
allow(type, SEPOL_EXEC_TYPE, "file", "getattr");
allow(type, SEPOL_EXEC_TYPE, "file", "execute");
allow(SEPOL_CLIENT_DOMAIN, type, "process", "sigchld");
// Auto transit to client domain
allow(type, SEPOL_CLIENT_DOMAIN, "process", "transition");
dontaudit(type, SEPOL_CLIENT_DOMAIN, "process", "siginh");
dontaudit(type, SEPOL_CLIENT_DOMAIN, "process", "rlimitinh");
dontaudit(type, SEPOL_CLIENT_DOMAIN, "process", "noatsecure");
// Kill client process
allow(type, SEPOL_CLIENT_DOMAIN, "process", "signal");
}
// type transition require actual types, not attributes
const char *app_types[]{
"system_app", "priv_app", "platform_app", "untrusted_app", "untrusted_app_25",
"untrusted_app_27", "untrusted_app_29", "untrusted_app_30"};
clients.pop_back();
clients.insert(clients.end(), app_types, app_types + std::size(app_types));
for (auto type : clients) {
// Auto transit to client domain
type_transition(type, SEPOL_EXEC_TYPE, "process", SEPOL_CLIENT_DOMAIN);
}
// Allow system_server to manage magisk_client
allow("system_server", SEPOL_CLIENT_DOMAIN, "process", "getpgid");
allow("system_server", SEPOL_CLIENT_DOMAIN, "process", "sigkill");
// Don't allow pesky processes to monitor audit deny logs when poking magisk daemon socket
dontaudit(ALL, SEPOL_PROC_DOMAIN, "unix_stream_socket", ALL);
// Only allow client processes and zygote to connect to magisk daemon socket
allow(SEPOL_CLIENT_DOMAIN, SEPOL_PROC_DOMAIN, "unix_stream_socket", ALL);
allow("zygote", SEPOL_PROC_DOMAIN, "unix_stream_socket", ALL);
} else {
// Fallback to poking holes in sandbox as Android 4.3 to 7.1 set PR_SET_NO_NEW_PRIVS
// Allow these processes to access MagiskSU
const char *clients[] { "init", "shell", "appdomain", "zygote" };
for (auto type : clients) {
if (!exists(type))
continue;
allow(type, SEPOL_PROC_DOMAIN, "unix_stream_socket", "connectto");
allow(type, SEPOL_PROC_DOMAIN, "unix_stream_socket", "getopt");
}
}
// Let everyone access tmpfs files (for SAR sbin overlay)
allow(ALL, "tmpfs", "file", ALL);
// Allow magiskinit daemon to handle mock selinuxfs
allow("kernel", "tmpfs", "fifo_file", "write");
// For relabelling files
allow("rootfs", "labeledfs", "filesystem", "associate");
allow(SEPOL_FILE_TYPE, "pipefs", "filesystem", "associate");
allow(SEPOL_FILE_TYPE, "devpts", "filesystem", "associate");
// Let init transit to SEPOL_PROC_DOMAIN
allow("kernel", "kernel", "process", "setcurrent");
allow("kernel", SEPOL_PROC_DOMAIN, "process", "dyntransition");
// Let init run stuffs
allow("kernel", SEPOL_PROC_DOMAIN, "fd", "use");
allow("init", SEPOL_PROC_DOMAIN, "process", ALL);
allow("init", "tmpfs", "file", "getattr");
allow("init", "tmpfs", "file", "execute");
// suRights
allow("servicemanager", SEPOL_PROC_DOMAIN, "dir", "search");
allow("servicemanager", SEPOL_PROC_DOMAIN, "dir", "read");
allow("servicemanager", SEPOL_PROC_DOMAIN, "file", "open");
allow("servicemanager", SEPOL_PROC_DOMAIN, "file", "read");
allow("servicemanager", SEPOL_PROC_DOMAIN, "process", "getattr");
allow(ALL, SEPOL_PROC_DOMAIN, "process", "sigchld");
// allowLog
allow("logd", SEPOL_PROC_DOMAIN, "dir", "search");
allow("logd", SEPOL_PROC_DOMAIN, "file", "read");
allow("logd", SEPOL_PROC_DOMAIN, "file", "open");
allow("logd", SEPOL_PROC_DOMAIN, "file", "getattr");
// dumpsys
allow(ALL, SEPOL_PROC_DOMAIN, "fd", "use");
allow(ALL, SEPOL_PROC_DOMAIN, "fifo_file", "write");
allow(ALL, SEPOL_PROC_DOMAIN, "fifo_file", "read");
allow(ALL, SEPOL_PROC_DOMAIN, "fifo_file", "open");
allow(ALL, SEPOL_PROC_DOMAIN, "fifo_file", "getattr");
// bootctl
allow("hwservicemanager", SEPOL_PROC_DOMAIN, "dir", "search");
allow("hwservicemanager", SEPOL_PROC_DOMAIN, "file", "read");
allow("hwservicemanager", SEPOL_PROC_DOMAIN, "file", "open");
allow("hwservicemanager", SEPOL_PROC_DOMAIN, "process", "getattr");
// For mounting loop devices, mirrors, tmpfs
allow("kernel", ALL, "file", "read");
allow("kernel", ALL, "file", "write");
// Allow all binder transactions
allow(ALL, SEPOL_PROC_DOMAIN, "binder", ALL);
// For changing file context
allow("rootfs", "tmpfs", "filesystem", "associate");
// Zygisk rules
allow("zygote", "zygote", "capability", "sys_resource"); // prctl PR_SET_MM
allow("zygote", "zygote", "process", "execmem");
allow("zygote", "fs_type", "filesystem", "unmount");
allow("system_server", "system_server", "process", "execmem");
// Shut llkd up
dontaudit("llkd", SEPOL_PROC_DOMAIN, "process", "ptrace");
dontaudit("llkd", SEPOL_CLIENT_DOMAIN, "process", "ptrace");
// Allow update_engine/addon.d-v2 to run permissive on all ROMs
permissive("update_engine");
#if 0
// Remove all dontaudit in debug mode
impl->strip_dontaudit();
#endif
set_log_level_state(LogLevel::Warn, true);
}