Commit 7cec8baa authored by topjohnwu's avatar topjohnwu

Merge magiskpolicy into Magisk main repo

parents c603b908 e987db9f
#include "magiskpolicy.h"
#include "sepolicy.h"
int sepol_allow(char *s, char *t, char *c, char *p) {
// printf("allow %s %s %s %s\n", s, t, c, p);
return add_rule(s, t, c, p, AVTAB_ALLOWED, 0);
}
int sepol_deny(char *s, char *t, char *c, char *p) {
// printf("deny %s %s %s %s\n", s, t, c, p);
return add_rule(s, t, c, p, AVTAB_ALLOWED, 1);
}
int sepol_auditallow(char *s, char *t, char *c, char *p) {
// printf("auditallow %s %s %s %s\n", s, t, c, p);
return add_rule(s, t, c, p, AVTAB_AUDITALLOW, 0);
}
int sepol_auditdeny(char *s, char *t, char *c, char *p) {
// printf("auditdeny %s %s %s %s\n", s, t, c, p);
return add_rule(s, t, c, p, AVTAB_AUDITDENY, 0);
}
int sepol_typetrans(char *s, char *t, char *c, char *d, char *o) {
if (o == NULL) {
// printf("add_trans %s %s %s %s\n", s, t, c ,d);
return add_transition(s, t, c, d);
} else {
// printf("add_file_trans %s %s %s %s %s\n", s, t, c ,d, o);
return add_file_transition(s, t, c, d, o);
}
}
int sepol_allowxperm(char *s, char *t, char *c, char *range) {
// printf("allowxperm %s %s %s %s\n", s, t, c, range);
return add_xperm_rule(s, t, c, range, AVTAB_XPERMS_ALLOWED, 0);
}
int sepol_auditallowxperm(char *s, char *t, char *c, char *range) {
// printf("auditallowxperm %s %s %s %s\n", s, t, c, range);
return add_xperm_rule(s, t, c, range, AVTAB_XPERMS_AUDITALLOW, 0);
}
int sepol_dontauditxperm(char *s, char *t, char *c, char *range) {
// printf("dontauditxperm %s %s %s %s\n", s, t, c, range);
return add_xperm_rule(s, t, c, range, AVTAB_XPERMS_DONTAUDIT, 0);
}
int sepol_permissive(char *s) {
// printf("permissive %s\n", s);
return set_domain_state(s, 1);
}
int sepol_enforce(char *s) {
// printf("enforce %s\n", s);
return set_domain_state(s, 0);
}
int sepol_create(char *s) {
// printf("create %s\n", s);
return create_domain(s);
}
int sepol_attradd(char *s, char *a) {
// printf("attradd %s %s\n", s, a);
return add_typeattribute(s, a);
}
int sepol_exists(char* source) {
return !! hashtab_search(policydb->p_types.table, source);
}
This diff is collapsed.
/* magiskpolicy.h - Public API for policy patching
*/
#ifndef _MAGISKPOLICY_H
#define _MAGISKPOLICY_H
#include <stdlib.h>
#define ALL NULL
#define SEPOL_PROC_DOMAIN "magisk"
#define SEPOL_FILE_DOMAIN "magisk_file"
// policydb functions
int load_policydb(const char *filename);
int dump_policydb(const char *filename);
void destroy_policydb();
// Handy functions
int sepol_allow(char *s, char *t, char *c, char *p);
int sepol_deny(char *s, char *t, char *c, char *p);
int sepol_auditallow(char *s, char *t, char *c, char *p);
int sepol_auditdeny(char *s, char *t, char *c, char *p);
int sepol_typetrans(char *s, char *t, char *c, char *d, char *o);
int sepol_allowxperm(char *s, char *t, char *c, char *range);
int sepol_auditallowxperm(char *s, char *t, char *c, char *range);
int sepol_dontauditxperm(char *s, char *t, char *c, char *range);
int sepol_create(char *s);
int sepol_permissive(char *s);
int sepol_enforce(char *s);
int sepol_attradd(char *s, char *a);
int sepol_exists(char *source);
// Built in rules
void sepol_magisk_rules();
#endif
#include "magiskpolicy.h"
#include "sepolicy.h"
void allowSuClient(char *target) {
if (!sepol_exists(target))
return;
sepol_allow(target, SEPOL_PROC_DOMAIN, "unix_stream_socket", "connectto");
sepol_allow(target, SEPOL_PROC_DOMAIN, "unix_stream_socket", "getopt");
sepol_allow(target, "devpts", "chr_file", "ioctl");
sepol_allow(SEPOL_PROC_DOMAIN, target, "fd", "use");
sepol_allow(SEPOL_PROC_DOMAIN, target, "fifo_file", ALL);
sepol_allow(target, SEPOL_PROC_DOMAIN, "process", "sigchld");
// Allow access to magisk files
sepol_allow(target, SEPOL_FILE_DOMAIN, "sock_file", "read");
sepol_allow(target, SEPOL_FILE_DOMAIN, "sock_file", "write");
sepol_allow(target, SEPOL_FILE_DOMAIN, "file", ALL);
sepol_allow(target, SEPOL_FILE_DOMAIN, "dir", ALL);
// Fix several terminal apps running root shell
if (policydb->policyvers >= POLICYDB_VERSION_XPERMS_IOCTL) {
sepol_allowxperm(target, "devpts", "chr_file", "0x5400-0x54FF");
if (sepol_exists("untrusted_app_devpts"))
sepol_allowxperm(target, "untrusted_app_devpts", "chr_file", "0x5400-0x54FF");
if (sepol_exists("untrusted_app_25_devpts"))
sepol_allowxperm(target, "untrusted_app_25_devpts", "chr_file", "0x5400-0x54FF");
if (sepol_exists("untrusted_app_all_devpts"))
sepol_allowxperm(target, "untrusted_app_all_devpts", "chr_file", "0x5400-0x54FF");
}
}
void suRights() {
sepol_allow("servicemanager", SEPOL_PROC_DOMAIN, "dir", "search");
sepol_allow("servicemanager", SEPOL_PROC_DOMAIN, "dir", "read");
sepol_allow("servicemanager", SEPOL_PROC_DOMAIN, "file", "open");
sepol_allow("servicemanager", SEPOL_PROC_DOMAIN, "file", "read");
sepol_allow("servicemanager", SEPOL_PROC_DOMAIN, "process", "getattr");
sepol_allow("servicemanager", SEPOL_PROC_DOMAIN, "binder", "transfer");
sepol_allow("system_server", SEPOL_PROC_DOMAIN, "binder", "call");
sepol_allow("system_server", SEPOL_PROC_DOMAIN, "fd", "use");
sepol_allow(SEPOL_PROC_DOMAIN, "servicemanager", "dir", "search");
sepol_allow(SEPOL_PROC_DOMAIN, "servicemanager", "dir", "read");
sepol_allow(SEPOL_PROC_DOMAIN, "servicemanager", "file", "open");
sepol_allow(SEPOL_PROC_DOMAIN, "servicemanager", "file", "read");
sepol_allow(SEPOL_PROC_DOMAIN, "servicemanager", "process", "getattr");
sepol_allow(SEPOL_PROC_DOMAIN, "servicemanager", "binder", "transfer");
sepol_allow(SEPOL_PROC_DOMAIN, "servicemanager", "binder", "call");
sepol_allow(SEPOL_PROC_DOMAIN, "system_server", "binder", "transfer");
sepol_allow(SEPOL_PROC_DOMAIN, "system_server", "binder", "call");
}
void otherToSU() {
// allowLog
sepol_allow("logd", SEPOL_PROC_DOMAIN, "dir", "search");
sepol_allow("logd", SEPOL_PROC_DOMAIN, "file", "read");
sepol_allow("logd", SEPOL_PROC_DOMAIN, "file", "open");
sepol_allow("logd", SEPOL_PROC_DOMAIN, "file", "getattr");
// suBackL0
sepol_allow("system_server", SEPOL_PROC_DOMAIN, "binder", "call");
sepol_allow("system_server", SEPOL_PROC_DOMAIN, "binder", "transfer");
// suBackL6
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");
// suMiscL6
if (sepol_exists("audioserver"))
sepol_allow("audioserver", "audioserver", "process", "execmem");
// Liveboot
sepol_allow("surfaceflinger", SEPOL_PROC_DOMAIN, "process", "ptrace");
sepol_allow("surfaceflinger", SEPOL_PROC_DOMAIN, "binder", "transfer");
sepol_allow("surfaceflinger", SEPOL_PROC_DOMAIN, "binder", "call");
sepol_allow("surfaceflinger", SEPOL_PROC_DOMAIN, "fd", "use");
sepol_allow("debuggerd", SEPOL_PROC_DOMAIN, "process", "ptrace");
// dumpsys
sepol_allow(ALL, SEPOL_PROC_DOMAIN, "fd", "use");
sepol_allow(ALL, SEPOL_PROC_DOMAIN, "fifo_file", "write");
sepol_allow(ALL, SEPOL_PROC_DOMAIN, "fifo_file", "read");
sepol_allow(ALL, SEPOL_PROC_DOMAIN, "fifo_file", "open");
sepol_allow(ALL, SEPOL_PROC_DOMAIN, "fifo_file", "getattr");
}
void sepol_magisk_rules() {
// First prevent anything to change sepolicy except ourselves
sepol_deny(ALL, "kernel", "security", "load_policy");
if (!sepol_exists(SEPOL_PROC_DOMAIN))
sepol_create(SEPOL_PROC_DOMAIN);
if (!sepol_exists(SEPOL_FILE_DOMAIN))
sepol_create(SEPOL_FILE_DOMAIN);
sepol_permissive(SEPOL_PROC_DOMAIN);
sepol_attradd(SEPOL_PROC_DOMAIN, "mlstrustedsubject");
sepol_attradd(SEPOL_PROC_DOMAIN, "netdomain");
sepol_attradd(SEPOL_PROC_DOMAIN, "bluetoothdomain");
sepol_attradd(SEPOL_FILE_DOMAIN, "mlstrustedobject");
// Let init run stuffs
sepol_allow("kernel", SEPOL_PROC_DOMAIN, "fd", "use");
sepol_allow("init", SEPOL_PROC_DOMAIN, "process", ALL);
// Shell, properties, logs
if (sepol_exists("default_prop"))
sepol_allow(SEPOL_PROC_DOMAIN, "default_prop", "property_service", "set");
sepol_allow(SEPOL_PROC_DOMAIN, "init", "unix_stream_socket", "connectto");
sepol_allow(SEPOL_PROC_DOMAIN, "rootfs", "filesystem", "remount");
if (sepol_exists("logd"))
sepol_allow(SEPOL_PROC_DOMAIN, "logd", "unix_stream_socket", "connectto");
sepol_allow(SEPOL_PROC_DOMAIN, SEPOL_PROC_DOMAIN, ALL, ALL);
// For sepolicy live patching
sepol_allow(SEPOL_PROC_DOMAIN, "kernel", "security", "read_policy");
sepol_allow(SEPOL_PROC_DOMAIN, "kernel", "security", "load_policy");
// Allow these client to access su
allowSuClient("init");
allowSuClient("shell");
allowSuClient("system_app");
allowSuClient("priv_app");
allowSuClient("platform_app");
allowSuClient("untrusted_app");
allowSuClient("untrusted_app_25");
allowSuClient("untrusted_app_27");
// Some superuser stuffs
suRights();
otherToSU();
// For mounting loop devices, mirrors, tmpfs
sepol_allow(SEPOL_PROC_DOMAIN, "kernel", "process", "setsched");
sepol_allow(SEPOL_PROC_DOMAIN, "labeledfs", "filesystem", "mount");
sepol_allow(SEPOL_PROC_DOMAIN, "labeledfs", "filesystem", "unmount");
sepol_allow(SEPOL_PROC_DOMAIN, "tmpfs", "filesystem", "mount");
sepol_allow(SEPOL_PROC_DOMAIN, "tmpfs", "filesystem", "unmount");
sepol_allow("kernel", ALL, "file", "read");
// Allow su to do anything to any files/dir/links
sepol_allow(SEPOL_PROC_DOMAIN, ALL, "file", ALL);
sepol_allow(SEPOL_PROC_DOMAIN, ALL, "dir", ALL);
sepol_allow(SEPOL_PROC_DOMAIN, ALL, "lnk_file", ALL);
sepol_allow(SEPOL_PROC_DOMAIN, ALL, "blk_file", ALL);
sepol_allow(SEPOL_PROC_DOMAIN, ALL, "sock_file", ALL);
sepol_allow(SEPOL_PROC_DOMAIN, ALL, "chr_file", ALL);
sepol_allow(SEPOL_PROC_DOMAIN, ALL, "fifo_file", ALL);
// For changing attributes
sepol_allow("rootfs", "tmpfs", "filesystem", "associate");
sepol_allow(SEPOL_FILE_DOMAIN, "labeledfs", "filesystem", "associate");
sepol_allow(SEPOL_FILE_DOMAIN, "tmpfs", "filesystem", "associate");
// Xposed
sepol_allow("untrusted_app", "untrusted_app", "capability", "setgid");
sepol_allow("system_server", "dex2oat_exec", "file", ALL);
// Support deodexed ROM on Oreo
sepol_allow("zygote", "dalvikcache_data_file", "file", "execute");
}
This diff is collapsed.
/* sepolicy.h - Header for magiskpolicy non-public APIs
*/
#ifndef _SEPOLICY_H
#define _SEPOLICY_H
#include <getopt.h>
#include <unistd.h>
#include <stdlib.h>
#include <sys/mman.h>
#include <sys/types.h>
#include <sys/stat.h>
#include <fcntl.h>
#include <stdio.h>
#include <limits.h>
#include <string.h>
#include <sepol/debug.h>
#include <sepol/policydb/policydb.h>
#include <sepol/policydb/expand.h>
#include <sepol/policydb/link.h>
#include <sepol/policydb/services.h>
#include <sepol/policydb/avrule_block.h>
#include <sepol/policydb/conditional.h>
#include <sepol/policydb/constraint.h>
#include "vector.h"
// hashtab traversal macro
#define hashtab_for_each(table, ptr) \
for (int _i = 0; _i < table->size; ++_i) \
for (*ptr = table->htable[_i]; *ptr != NULL; *ptr = (*ptr)->next)
// Global policydb
extern policydb_t *policydb;
// sepolicy manipulation functions
int create_domain(char *d);
int set_domain_state(char* s, int state);
int add_transition(char *s, char *t, char *c, char *d);
int add_file_transition(char *s, char *t, char *c, char *d, char* filename);
int add_typeattribute(char *domainS, char *attr);
int add_rule(char *s, char *t, char *c, char *p, int effect, int not);
int add_xperm_rule(char *s, char *t, char *c, char *range, int effect, int not);
extern int policydb_index_decls(sepol_handle_t * handle, policydb_t * p);
#endif
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