Magisk/rules.c

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C
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#include "magiskpolicy.h"
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#include "sepolicy.h"
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void allowSuClient(char *target) {
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if (!sepol_exists(target))
return;
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sepol_allow(target, "rootfs", "file", ALL);
sepol_allow(target, "rootfs", "lnk_file", ALL);
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sepol_allow(target, "su", "unix_stream_socket", "connectto");
sepol_allow(target, "su", "unix_stream_socket", "getopt");
sepol_allow(target, "su_file", "sock_file", "read");
sepol_allow(target, "su_file", "sock_file", "write");
sepol_allow(target, "su_file", "file", ALL);
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sepol_allow(target, "su_file", "dir", ALL);
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sepol_allow(target, "devpts", "chr_file", "ioctl");
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sepol_allow("su", target, "fd", "use");
sepol_allow("su", target, "fifo_file", ALL);
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}
void suRights() {
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sepol_allow("servicemanager", "su", "dir", "search");
sepol_allow("servicemanager", "su", "dir", "read");
sepol_allow("servicemanager", "su", "file", "open");
sepol_allow("servicemanager", "su", "file", "read");
sepol_allow("servicemanager", "su", "process", "getattr");
sepol_allow("servicemanager", "su", "binder", "transfer");
sepol_allow("system_server", "su", "binder", "call");
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sepol_allow("system_server", "su", "fd", "use");
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sepol_allow("su", "servicemanager", "dir", "search");
sepol_allow("su", "servicemanager", "dir", "read");
sepol_allow("su", "servicemanager", "file", "open");
sepol_allow("su", "servicemanager", "file", "read");
sepol_allow("su", "servicemanager", "process", "getattr");
sepol_allow("su", "servicemanager", "binder", "transfer");
sepol_allow("su", "servicemanager", "binder", "call");
sepol_allow("su", "system_server", "binder", "transfer");
sepol_allow("su", "system_server", "binder", "call");
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}
void otherToSU() {
// allowLog
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sepol_allow("logd", "su", "dir", "search");
sepol_allow("logd", "su", "file", "read");
sepol_allow("logd", "su", "file", "open");
sepol_allow("logd", "su", "file", "getattr");
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// suBackL0
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sepol_allow("system_server", "su", "binder", "call");
sepol_allow("system_server", "su", "binder", "transfer");
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// ES Explorer opens a sokcet
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sepol_allow("untrusted_app", "su", "unix_stream_socket", "ioctl");
sepol_allow("untrusted_app", "su", "unix_stream_socket", "read");
sepol_allow("untrusted_app", "su", "unix_stream_socket", "getattr");
sepol_allow("untrusted_app", "su", "unix_stream_socket", "write");
sepol_allow("untrusted_app", "su", "unix_stream_socket", "setattr");
sepol_allow("untrusted_app", "su", "unix_stream_socket", "lock");
sepol_allow("untrusted_app", "su", "unix_stream_socket", "append");
sepol_allow("untrusted_app", "su", "unix_stream_socket", "bind");
sepol_allow("untrusted_app", "su", "unix_stream_socket", "connect");
sepol_allow("untrusted_app", "su", "unix_stream_socket", "getopt");
sepol_allow("untrusted_app", "su", "unix_stream_socket", "setopt");
sepol_allow("untrusted_app", "su", "unix_stream_socket", "shutdown");
sepol_allow("untrusted_app", "su", "unix_stream_socket", "connectto");
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// Any domain is allowed to send su "sigchld"
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sepol_allow(ALL, "su", "process", "sigchld");
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// uNetworkL0
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sepol_attradd("su", "netdomain");
sepol_attradd("su", "bluetoothdomain");
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// suBackL6
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sepol_allow("surfaceflinger", "app_data_file", "dir", ALL);
sepol_allow("surfaceflinger", "app_data_file", "file", ALL);
sepol_allow("surfaceflinger", "app_data_file", "lnk_file", ALL);
sepol_attradd("surfaceflinger", "mlstrustedsubject");
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// suMiscL6
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if (sepol_exists("audioserver"))
sepol_allow("audioserver", "audioserver", "process", "execmem");
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// Liveboot
sepol_allow("surfaceflinger", "su", "process", "ptrace");
sepol_allow("surfaceflinger", "su", "binder", "transfer");
sepol_allow("surfaceflinger", "su", "binder", "call");
sepol_allow("surfaceflinger", "su", "fd", "use");
sepol_allow("debuggerd", "su", "process", "ptrace");
// dumpsys
sepol_allow(ALL, "su", "fd", "use");
sepol_allow(ALL, "su", "fifo_file", "write");
sepol_allow(ALL, "su", "fifo_file", "read");
sepol_allow(ALL, "su", "fifo_file", "open");
sepol_allow(ALL, "su", "fifo_file", "getattr");
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}
void sepol_magisk_rules() {
// First prevent anything to change sepolicy except ourselves
sepol_deny(ALL, "kernel", "security", "load_policy");
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if (!sepol_exists("su"))
sepol_create("su");
if (!sepol_exists("su_file"))
sepol_create("su_file");
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sepol_permissive("su");
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sepol_attradd("su", "mlstrustedsubject");
sepol_attradd("su_file", "mlstrustedobject");
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// Allow magiskinit daemon to run and run in su context
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sepol_allow("kernel", "device", "dir", ALL);
sepol_allow("kernel", "device", "file", ALL);
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sepol_allow("kernel", "su", "unix_stream_socket", "connectto");
sepol_allow("kernel", "kernel", "process", "setcurrent");
sepol_allow("kernel", "su", "process", "dyntransition");
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// Let init run stuffs
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sepol_allow("kernel", "su", "fd", "use");
sepol_allow("init", "su", "process", ALL);
sepol_allow("init", "system_file", "dir", ALL);
sepol_allow("init", "system_file", "lnk_file", ALL);
sepol_allow("init", "system_file", "file", ALL);
sepol_allow("init", "rootfs", "lnk_file", ALL);
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// Shell, properties, logs
if (sepol_exists("default_prop"))
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sepol_allow("su", "default_prop", "property_service", "set");
sepol_allow("su", "init", "unix_stream_socket", "connectto");
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sepol_allow("su", "rootfs", "filesystem", "remount");
if (sepol_exists("logd"))
sepol_allow("su", "logd", "unix_stream_socket", "connectto");
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sepol_allow("su", "su", ALL, ALL);
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// For sepolicy live patching
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sepol_allow("su", "kernel", "security", "read_policy");
sepol_allow("su", "kernel", "security", "load_policy");
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// Allow these client to access su
allowSuClient("shell");
allowSuClient("untrusted_app");
allowSuClient("system_app");
allowSuClient("platform_app");
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allowSuClient("priv_app");
allowSuClient("untrusted_app_25");
allowSuClient("untrusted_app_27");
// Some superuser stuffs
suRights();
otherToSU();
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// For mounting loop devices, mirrors, tmpfs
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sepol_allow("su", "kernel", "process", "setsched");
sepol_allow("su", "labeledfs", "filesystem", "mount");
sepol_allow("su", "labeledfs", "filesystem", "unmount");
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sepol_allow("su", "tmpfs", "filesystem", "mount");
sepol_allow("su", "tmpfs", "filesystem", "unmount");
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sepol_allow("kernel", ALL, "file", "read");
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// Allow su to do anything to any files/dir/links
sepol_allow("su", ALL, "file", ALL);
sepol_allow("su", ALL, "dir", ALL);
sepol_allow("su", ALL, "lnk_file", ALL);
sepol_allow("su", ALL, "blk_file", ALL);
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sepol_allow("su", ALL, "sock_file", ALL);
sepol_allow("su", ALL, "chr_file", ALL);
sepol_allow("su", ALL, "fifo_file", ALL);
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// For changing attributes
sepol_allow("rootfs", "tmpfs", "filesystem", "associate");
sepol_allow("su_file", "labeledfs", "filesystem", "associate");
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sepol_allow("su_file", "tmpfs", "filesystem", "associate");
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// Xposed
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sepol_allow("untrusted_app", "untrusted_app", "capability", "setgid");
sepol_allow("system_server", "dex2oat_exec", "file", ALL);
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// xperms
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if (policydb->policyvers >= POLICYDB_VERSION_XPERMS_IOCTL) {
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sepol_allowxperm("domain", "devpts", "chr_file", "0x5400-0x54FF");
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if (sepol_exists("untrusted_app_25_devpts"))
sepol_allowxperm("domain", "untrusted_app_25_devpts", "chr_file", "0x5400-0x54FF");
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if (sepol_exists("untrusted_app_devpts"))
sepol_allowxperm("domain", "untrusted_app_devpts", "chr_file", "0x5400-0x54FF");
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}
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}
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