mirror of
https://github.com/topjohnwu/Magisk.git
synced 2024-11-24 10:35:26 +00:00
182 lines
6.8 KiB
C++
182 lines
6.8 KiB
C++
#include <utils.hpp>
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#include <magiskpolicy.hpp>
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#include "sepolicy.hpp"
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void sepolicy::magisk_rules() {
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// Temp suppress warnings
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auto bak = log_cb.w;
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log_cb.w = nop_log;
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// Prevent anything to change sepolicy except ourselves
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deny(ALL, "kernel", "security", "load_policy");
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type(SEPOL_PROC_DOMAIN, "domain");
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type(SEPOL_CLIENT_DOMAIN, "domain");
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type(SEPOL_FILE_TYPE, "file_type");
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type(SEPOL_EXEC_TYPE, "file_type");
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permissive(SEPOL_PROC_DOMAIN); /* Just in case something is missing */
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typeattribute(SEPOL_PROC_DOMAIN, "mlstrustedsubject");
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typeattribute(SEPOL_PROC_DOMAIN, "netdomain");
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typeattribute(SEPOL_PROC_DOMAIN, "bluetoothdomain");
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typeattribute(SEPOL_FILE_TYPE, "mlstrustedobject");
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// Make our root domain unconstrained
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allow(SEPOL_PROC_DOMAIN, ALL, ALL, ALL);
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// Allow us to do any ioctl on all block devices
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if (db->policyvers >= POLICYDB_VERSION_XPERMS_IOCTL)
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allowxperm(SEPOL_PROC_DOMAIN, ALL, "blk_file", ALL);
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// Create unconstrained file type
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allow(ALL, SEPOL_FILE_TYPE, "file", ALL);
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allow(ALL, SEPOL_FILE_TYPE, "dir", ALL);
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allow(ALL, SEPOL_FILE_TYPE, "fifo_file", ALL);
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allow(ALL, SEPOL_FILE_TYPE, "chr_file", ALL);
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// Basic su client needs
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allow(SEPOL_CLIENT_DOMAIN, ALL, "fd", "use");
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allow(SEPOL_CLIENT_DOMAIN, SEPOL_CLIENT_DOMAIN, ALL, ALL);
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allow(SEPOL_CLIENT_DOMAIN, SEPOL_EXEC_TYPE, "file", ALL);
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allow(SEPOL_CLIENT_DOMAIN, SEPOL_PROC_DOMAIN, "unix_stream_socket", "connectto");
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allow(SEPOL_CLIENT_DOMAIN, SEPOL_PROC_DOMAIN, "unix_stream_socket", "getopt");
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// Allow su client to manipulate pts
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const char *pts[] {
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"devpts", "untrusted_app_devpts", "untrusted_app_25_devpts", "untrusted_app_all_devpts" };
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for (auto type : pts) {
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allow(SEPOL_CLIENT_DOMAIN, type, "chr_file", "read");
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allow(SEPOL_CLIENT_DOMAIN, type, "chr_file", "write");
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allow(SEPOL_CLIENT_DOMAIN, type, "chr_file", "getattr");
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allow(SEPOL_CLIENT_DOMAIN, type, "chr_file", "ioctl");
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if (db->policyvers >= POLICYDB_VERSION_XPERMS_IOCTL)
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allowxperm(SEPOL_CLIENT_DOMAIN, type, "chr_file", "0x5400-0x54FF");
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}
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// Allow these processes to access MagiskSU
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const char *clients[] {
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"init", "shell", "system_app", "priv_app", "platform_app", "untrusted_app",
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"untrusted_app_25", "untrusted_app_27", "untrusted_app_29", "update_engine" };
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for (auto type : clients) {
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if (!exists(type))
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continue;
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// exec magisk
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allow(type, SEPOL_EXEC_TYPE, "file", "read");
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allow(type, SEPOL_EXEC_TYPE, "file", "open");
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allow(type, SEPOL_EXEC_TYPE, "file", "getattr");
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allow(type, SEPOL_EXEC_TYPE, "file", "execute");
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// Auto transit to client domain
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type_transition(type, SEPOL_EXEC_TYPE, "process", SEPOL_CLIENT_DOMAIN);
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allow(type, SEPOL_CLIENT_DOMAIN, "process", "transition");
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dontaudit(type, SEPOL_CLIENT_DOMAIN, "process", "siginh");
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dontaudit(type, SEPOL_CLIENT_DOMAIN, "process", "rlimitinh");
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dontaudit(type, SEPOL_CLIENT_DOMAIN, "process", "noatsecure");
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allow(SEPOL_CLIENT_DOMAIN, type, "process", "sigchld");
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allow(SEPOL_CLIENT_DOMAIN, type, "fifo_file", "read");
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allow(SEPOL_CLIENT_DOMAIN, type, "fifo_file", "write");
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allow(SEPOL_CLIENT_DOMAIN, type, "fifo_file", "ioctl");
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}
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// Allow system_server to manage magisk_client
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allow("system_server", SEPOL_CLIENT_DOMAIN, "process", "getpgid");
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allow("system_server", SEPOL_CLIENT_DOMAIN, "process", "sigkill");
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// Don't allow pesky processes to monitor audit deny logs when poking magisk daemon sockets
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dontaudit(ALL, SEPOL_PROC_DOMAIN, "unix_stream_socket", ALL);
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// Let everyone access tmpfs files (for SAR sbin overlay)
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allow(ALL, "tmpfs", "file", ALL);
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// For relabelling files
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allow("rootfs", "labeledfs", "filesystem", "associate");
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allow(SEPOL_FILE_TYPE, "pipefs", "filesystem", "associate");
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allow(SEPOL_FILE_TYPE, "devpts", "filesystem", "associate");
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// Let init transit to SEPOL_PROC_DOMAIN
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allow("kernel", "kernel", "process", "setcurrent");
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allow("kernel", SEPOL_PROC_DOMAIN, "process", "dyntransition");
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// Let init run stuffs
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allow("kernel", SEPOL_PROC_DOMAIN, "fd", "use");
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allow("init", SEPOL_PROC_DOMAIN, "process", ALL);
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allow("init", "tmpfs", "file", "getattr");
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allow("init", "tmpfs", "file", "execute");
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// suRights
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allow("servicemanager", SEPOL_PROC_DOMAIN, "dir", "search");
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allow("servicemanager", SEPOL_PROC_DOMAIN, "dir", "read");
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allow("servicemanager", SEPOL_PROC_DOMAIN, "file", "open");
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allow("servicemanager", SEPOL_PROC_DOMAIN, "file", "read");
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allow("servicemanager", SEPOL_PROC_DOMAIN, "process", "getattr");
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allow("servicemanager", SEPOL_PROC_DOMAIN, "binder", "transfer");
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allow(ALL, SEPOL_PROC_DOMAIN, "process", "sigchld");
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// allowLog
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allow("logd", SEPOL_PROC_DOMAIN, "dir", "search");
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allow("logd", SEPOL_PROC_DOMAIN, "file", "read");
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allow("logd", SEPOL_PROC_DOMAIN, "file", "open");
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allow("logd", SEPOL_PROC_DOMAIN, "file", "getattr");
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// suBackL6
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allow("surfaceflinger", "app_data_file", "dir", ALL);
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allow("surfaceflinger", "app_data_file", "file", ALL);
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allow("surfaceflinger", "app_data_file", "lnk_file", ALL);
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typeattribute("surfaceflinger", "mlstrustedsubject");
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// suMiscL6
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allow("audioserver", "audioserver", "process", "execmem");
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// Liveboot
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allow("surfaceflinger", SEPOL_PROC_DOMAIN, "process", "ptrace");
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allow("surfaceflinger", SEPOL_PROC_DOMAIN, "binder", "transfer");
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allow("surfaceflinger", SEPOL_PROC_DOMAIN, "binder", "call");
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allow("surfaceflinger", SEPOL_PROC_DOMAIN, "fd", "use");
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allow("debuggerd", SEPOL_PROC_DOMAIN, "process", "ptrace");
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// dumpsys
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allow(ALL, SEPOL_PROC_DOMAIN, "fd", "use");
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allow(ALL, SEPOL_PROC_DOMAIN, "fifo_file", "write");
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allow(ALL, SEPOL_PROC_DOMAIN, "fifo_file", "read");
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allow(ALL, SEPOL_PROC_DOMAIN, "fifo_file", "open");
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allow(ALL, SEPOL_PROC_DOMAIN, "fifo_file", "getattr");
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// bootctl
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allow("hwservicemanager", SEPOL_PROC_DOMAIN, "dir", "search");
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allow("hwservicemanager", SEPOL_PROC_DOMAIN, "file", "read");
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allow("hwservicemanager", SEPOL_PROC_DOMAIN, "file", "open");
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allow("hwservicemanager", SEPOL_PROC_DOMAIN, "process", "getattr");
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allow("hwservicemanager", SEPOL_PROC_DOMAIN, "binder", "transfer");
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// For mounting loop devices, mirrors, tmpfs
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allow("kernel", ALL, "file", "read");
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allow("kernel", ALL, "file", "write");
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// Allow all binder transactions
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allow(ALL, SEPOL_PROC_DOMAIN, "binder", ALL);
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// For changing file context
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allow("rootfs", "tmpfs", "filesystem", "associate");
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// Xposed
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allow("untrusted_app", "untrusted_app", "capability", "setgid");
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allow("system_server", "dex2oat_exec", "file", ALL);
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// Support deodexed ROM on Oreo
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allow("zygote", "dalvikcache_data_file", "file", "execute");
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// Support deodexed ROM on Pie (Samsung)
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allow("system_server", "dalvikcache_data_file", "file", "write");
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allow("system_server", "dalvikcache_data_file", "file", "execute");
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// Allow update_engine/addon.d-v2 to run permissive on all ROMs
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permissive("update_engine");
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#if 0
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// Remove all dontaudit in debug mode
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impl->strip_dontaudit();
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#endif
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log_cb.w = bak;
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}
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