mirror of
https://github.com/topjohnwu/Magisk.git
synced 2024-11-27 20:15:29 +00:00
Rewrite sepolicy.c in C++
This commit is contained in:
topjohnwu
parent
0236ab887e
commit
f392ade78d
@ -63,12 +63,11 @@ LOCAL_SRC_FILES := \
|
||||
init/getinfo.cpp \
|
||||
init/twostage.cpp \
|
||||
core/socket.cpp \
|
||||
magiskpolicy/api.cpp \
|
||||
magiskpolicy/sepolicy.cpp \
|
||||
magiskpolicy/magiskpolicy.cpp \
|
||||
magiskpolicy/rules.cpp \
|
||||
magiskpolicy/policydb.cpp \
|
||||
magiskpolicy/statement.cpp \
|
||||
magiskpolicy/sepolicy.c \
|
||||
magiskboot/pattern.cpp
|
||||
|
||||
LOCAL_LDFLAGS := -static
|
||||
@ -108,12 +107,11 @@ LOCAL_C_INCLUDES := jni/include
|
||||
|
||||
LOCAL_SRC_FILES := \
|
||||
core/applet_stub.cpp \
|
||||
magiskpolicy/api.cpp \
|
||||
magiskpolicy/sepolicy.cpp \
|
||||
magiskpolicy/magiskpolicy.cpp \
|
||||
magiskpolicy/rules.cpp \
|
||||
magiskpolicy/policydb.cpp \
|
||||
magiskpolicy/statement.cpp \
|
||||
magiskpolicy/sepolicy.c
|
||||
magiskpolicy/statement.cpp
|
||||
|
||||
LOCAL_CFLAGS := -DAPPLET_STUB_MAIN=magiskpolicy_main
|
||||
LOCAL_LDFLAGS := -static
|
||||
|
||||
@ -41,7 +41,7 @@ public:
|
||||
int dontauditxperm(c_str src, c_str tgt, c_str cls, c_str range);
|
||||
|
||||
// Type rules
|
||||
int type_transition(c_str src, c_str tgt, c_str cls, c_str def, c_str obj = nullptr);
|
||||
int type_transition(c_str s, c_str t, c_str c, c_str d, c_str o = nullptr);
|
||||
int type_change(c_str src, c_str tgt, c_str cls, c_str def);
|
||||
int type_member(c_str src, c_str tgt, c_str cls, c_str def);
|
||||
|
||||
@ -50,8 +50,7 @@ public:
|
||||
|
||||
// Magisk
|
||||
void magisk_rules();
|
||||
void allow_su_client(c_str type);
|
||||
|
||||
private:
|
||||
protected:
|
||||
policydb *db;
|
||||
};
|
||||
|
||||
@ -1,90 +0,0 @@
|
||||
#include <magiskpolicy.hpp>
|
||||
|
||||
#include "sepolicy.h"
|
||||
|
||||
//#define vprint(fmt, ...) printf(fmt, __VA_ARGS__)
|
||||
#define vprint(...)
|
||||
|
||||
int sepolicy::allow(const char *s, const char *t, const char *c, const char *p) {
|
||||
vprint("allow %s %s %s %s\n", s, t, c, p);
|
||||
return add_rule(db, s, t, c, p, AVTAB_ALLOWED, 0);
|
||||
}
|
||||
|
||||
int sepolicy::deny(const char *s, const char *t, const char *c, const char *p) {
|
||||
vprint("deny %s %s %s %s\n", s, t, c, p);
|
||||
return add_rule(db, s, t, c, p, AVTAB_ALLOWED, 1);
|
||||
}
|
||||
|
||||
int sepolicy::auditallow(const char *s, const char *t, const char *c, const char *p) {
|
||||
vprint("auditallow %s %s %s %s\n", s, t, c, p);
|
||||
return add_rule(db, s, t, c, p, AVTAB_AUDITALLOW, 0);
|
||||
}
|
||||
|
||||
int sepolicy::dontaudit(const char *s, const char *t, const char *c, const char *p) {
|
||||
vprint("dontaudit %s %s %s %s\n", s, t, c, p);
|
||||
return add_rule(db, s, t, c, p, AVTAB_AUDITDENY, 1);
|
||||
}
|
||||
|
||||
int sepolicy::allowxperm(const char *s, const char *t, const char *c, const char *range) {
|
||||
vprint("allowxperm %s %s %s %s\n", s, t, c, range);
|
||||
return add_xperm_rule(db, s, t, c, range, AVTAB_XPERMS_ALLOWED, 0);
|
||||
}
|
||||
|
||||
int sepolicy::auditallowxperm(const char *s, const char *t, const char *c, const char *range) {
|
||||
vprint("auditallowxperm %s %s %s %s\n", s, t, c, range);
|
||||
return add_xperm_rule(db, s, t, c, range, AVTAB_XPERMS_AUDITALLOW, 0);
|
||||
}
|
||||
|
||||
int sepolicy::dontauditxperm(const char *s, const char *t, const char *c, const char *range) {
|
||||
vprint("dontauditxperm %s %s %s %s\n", s, t, c, range);
|
||||
return add_xperm_rule(db, s, t, c, range, AVTAB_XPERMS_DONTAUDIT, 0);
|
||||
}
|
||||
|
||||
int sepolicy::type_change(const char *s, const char *t, const char *c, const char *d) {
|
||||
vprint("type_change %s %s %s %s\n", s, t, c, d);
|
||||
return add_type_rule(db, s, t, c, d, AVTAB_CHANGE);
|
||||
}
|
||||
|
||||
int sepolicy::type_member(const char *s, const char *t, const char *c, const char *d) {
|
||||
vprint("type_member %s %s %s %s\n", s, t, c, d);
|
||||
return add_type_rule(db, s, t, c, d, AVTAB_MEMBER);
|
||||
}
|
||||
|
||||
int sepolicy::type_transition(const char *src, const char *tgt, const char *cls, const char *def, const char *obj) {
|
||||
if (obj) {
|
||||
vprint("type_transition %s %s %s %s\n", src, tgt, cls, def);
|
||||
return add_type_rule(db, src, tgt, cls, def, AVTAB_TRANSITION);
|
||||
} else {
|
||||
vprint("type_transition %s %s %s %s %s\n", src, tgt, cls, def, obj);
|
||||
return add_filename_trans(db, src, tgt, cls, def, obj);
|
||||
}
|
||||
}
|
||||
|
||||
int sepolicy::permissive(const char *s) {
|
||||
vprint("permissive %s\n", s);
|
||||
return set_domain_state(db, s, 1);
|
||||
}
|
||||
|
||||
int sepolicy::enforce(const char *s) {
|
||||
vprint("enforce %s\n", s);
|
||||
return set_domain_state(db, s, 0);
|
||||
}
|
||||
|
||||
int sepolicy::create(const char *s) {
|
||||
vprint("create %s\n", s);
|
||||
return create_domain(db, s);
|
||||
}
|
||||
|
||||
int sepolicy::typeattribute(const char *type, const char *attr) {
|
||||
vprint("typeattribute %s %s\n", type, attr);
|
||||
return add_typeattribute(db, type, attr);
|
||||
}
|
||||
|
||||
int sepolicy::genfscon(const char *fs_name, const char *path, const char *ctx) {
|
||||
vprint("genfscon %s %s %s\n", fs_name, path, ctx);
|
||||
return add_genfscon(db, fs_name, path, ctx);
|
||||
}
|
||||
|
||||
int sepolicy::exists(const char *source) {
|
||||
return hashtab_search(db->p_types.table, source) != nullptr;
|
||||
}
|
||||
@ -6,7 +6,7 @@
|
||||
#include <flags.h>
|
||||
#include <magiskpolicy.hpp>
|
||||
|
||||
#include "sepolicy.h"
|
||||
#include "sepolicy.hpp"
|
||||
|
||||
using namespace std::literals;
|
||||
|
||||
|
||||
@ -10,7 +10,7 @@
|
||||
#include <stream.hpp>
|
||||
#include <magiskpolicy.hpp>
|
||||
|
||||
#include "sepolicy.h"
|
||||
#include "sepolicy.hpp"
|
||||
|
||||
#define SHALEN 64
|
||||
static bool cmp_sha256(const char *a, const char *b) {
|
||||
|
||||
@ -1,10 +1,12 @@
|
||||
#include <initializer_list>
|
||||
|
||||
#include <logging.hpp>
|
||||
#include <flags.h>
|
||||
#include <magiskpolicy.hpp>
|
||||
|
||||
#include "sepolicy.h"
|
||||
#include "sepolicy.hpp"
|
||||
|
||||
void sepolicy::allow_su_client(const char *type) {
|
||||
void sepol_impl::allow_su_client(const char *type) {
|
||||
if (!exists(type))
|
||||
return;
|
||||
allow(type, SEPOL_PROC_DOMAIN, "unix_stream_socket", "connectto");
|
||||
@ -78,16 +80,11 @@ void sepolicy::magisk_rules() {
|
||||
allow(SEPOL_PROC_DOMAIN, "kernel", "security", "load_policy");
|
||||
|
||||
// Allow these processes to access MagiskSU
|
||||
allow_su_client("init");
|
||||
allow_su_client("shell");
|
||||
allow_su_client("system_app");
|
||||
allow_su_client("priv_app");
|
||||
allow_su_client("platform_app");
|
||||
allow_su_client("untrusted_app");
|
||||
allow_su_client("untrusted_app_25");
|
||||
allow_su_client("untrusted_app_27");
|
||||
allow_su_client("untrusted_app_29");
|
||||
allow_su_client("update_engine");
|
||||
std::initializer_list<const char *> clients {
|
||||
"init", "shell", "system_app", "priv_app", "platform_app", "untrusted_app",
|
||||
"untrusted_app_25", "untrusted_app_27", "untrusted_app_29", "update_engine" };
|
||||
for (auto type : clients)
|
||||
impl->allow_su_client(type);
|
||||
|
||||
// suRights
|
||||
allow("servicemanager", SEPOL_PROC_DOMAIN, "dir", "search");
|
||||
@ -199,7 +196,7 @@ void sepolicy::magisk_rules() {
|
||||
|
||||
#if 0
|
||||
// Remove all dontaudit in debug mode
|
||||
strip_dontaudit(db);
|
||||
impl->strip_dontaudit();
|
||||
#endif
|
||||
|
||||
log_cb.w = bak;
|
||||
|
||||
@ -1,563 +0,0 @@
|
||||
#include <stdlib.h>
|
||||
#include <sepol/policydb/expand.h>
|
||||
|
||||
#include <logging.hpp>
|
||||
|
||||
#include "sepolicy.h"
|
||||
|
||||
extern void *xmalloc(size_t size);
|
||||
extern void *xcalloc(size_t nmemb, size_t size);
|
||||
extern void *xrealloc(void *ptr, size_t size);
|
||||
|
||||
// Internal libsepol APIs
|
||||
extern int policydb_index_decls(sepol_handle_t * handle, policydb_t * p);
|
||||
extern int context_from_string(
|
||||
sepol_handle_t * handle,
|
||||
const policydb_t * policydb,
|
||||
context_struct_t ** cptr,
|
||||
const char *con_str, size_t con_str_len);
|
||||
|
||||
// Generic hash table traversal
|
||||
#define hash_for_each(node_ptr, n_slots, table, block) \
|
||||
for (int __i = 0; __i < (table)->n_slots; ++__i) { \
|
||||
__typeof__(*(table)->node_ptr) node; \
|
||||
__typeof__(node) __next; \
|
||||
for (node = (table)->node_ptr[__i]; node; node = __next) { \
|
||||
__next = node->next; \
|
||||
block \
|
||||
} \
|
||||
}
|
||||
|
||||
// hashtab traversal
|
||||
#define hashtab_for_each(hashtab, block) \
|
||||
hash_for_each(htable, size, hashtab, block)
|
||||
|
||||
// avtab traversal
|
||||
#define avtab_for_each(avtab, block) \
|
||||
hash_for_each(htable, nslot, avtab, block)
|
||||
|
||||
static int set_attr(policydb_t *db, const char *type, int value) {
|
||||
type_datum_t *attr = hashtab_search(db->p_types.table, type);
|
||||
if (!attr || attr->flavor != TYPE_ATTRIB)
|
||||
return -1;
|
||||
|
||||
if (ebitmap_set_bit(&db->type_attr_map[value - 1], attr->s.value - 1, 1))
|
||||
return -1;
|
||||
if (ebitmap_set_bit(&db->attr_type_map[attr->s.value - 1], value - 1, 1))
|
||||
return -1;
|
||||
|
||||
return attr->s.value;
|
||||
}
|
||||
|
||||
static void check_avtab_node(policydb_t *db, avtab_ptr_t node) {
|
||||
int redundant = 0;
|
||||
if (node->key.specified == AVTAB_AUDITDENY)
|
||||
redundant = node->datum.data == ~0U;
|
||||
else if (node->key.specified & AVTAB_XPERMS)
|
||||
redundant = node->datum.xperms == NULL;
|
||||
else
|
||||
redundant = node->datum.data == 0U;
|
||||
if (redundant)
|
||||
avtab_remove_node(&db->te_avtab, node);
|
||||
}
|
||||
|
||||
static avtab_ptr_t get_avtab_node(policydb_t *db, avtab_key_t *key, avtab_extended_perms_t *xperms) {
|
||||
avtab_ptr_t node;
|
||||
avtab_datum_t avdatum;
|
||||
int match = 0;
|
||||
|
||||
/* AVTAB_XPERMS entries are not necessarily unique */
|
||||
if (key->specified & AVTAB_XPERMS) {
|
||||
node = avtab_search_node(&db->te_avtab, key);
|
||||
while (node) {
|
||||
if ((node->datum.xperms->specified == xperms->specified) &&
|
||||
(node->datum.xperms->driver == xperms->driver)) {
|
||||
match = 1;
|
||||
break;
|
||||
}
|
||||
node = avtab_search_node_next(node, key->specified);
|
||||
}
|
||||
if (!match)
|
||||
node = NULL;
|
||||
} else {
|
||||
node = avtab_search_node(&db->te_avtab, key);
|
||||
}
|
||||
|
||||
if (!node) {
|
||||
memset(&avdatum, 0, sizeof avdatum);
|
||||
/*
|
||||
* AUDITDENY, aka DONTAUDIT, are &= assigned, versus |= for
|
||||
* others. Initialize the data accordingly.
|
||||
*/
|
||||
avdatum.data = key->specified == AVTAB_AUDITDENY ? ~0U : 0U;
|
||||
/* this is used to get the node - insertion is actually unique */
|
||||
node = avtab_insert_nonunique(&db->te_avtab, key, &avdatum);
|
||||
}
|
||||
|
||||
return node;
|
||||
}
|
||||
|
||||
static int add_avrule(policydb_t *db, avtab_key_t *key, int val, int not) {
|
||||
avtab_ptr_t node = get_avtab_node(NULL, key, NULL);
|
||||
|
||||
if (not) {
|
||||
if (val < 0)
|
||||
node->datum.data = 0U;
|
||||
else
|
||||
node->datum.data &= ~(1U << (val - 1));
|
||||
} else {
|
||||
if (val < 0)
|
||||
node->datum.data = ~0U;
|
||||
else
|
||||
node->datum.data |= 1U << (val - 1);
|
||||
}
|
||||
|
||||
check_avtab_node(db, node);
|
||||
return 0;
|
||||
}
|
||||
|
||||
static int add_rule_auto(policydb_t *db, type_datum_t *src, type_datum_t *tgt, class_datum_t *cls,
|
||||
perm_datum_t *perm, int effect, int not) {
|
||||
avtab_key_t key;
|
||||
int ret = 0;
|
||||
|
||||
if (src == NULL) {
|
||||
hashtab_for_each(db->p_types.table, {
|
||||
src = node->datum;
|
||||
ret |= add_rule_auto(db, src, tgt, cls, perm, effect, not);
|
||||
})
|
||||
} else if (tgt == NULL) {
|
||||
hashtab_for_each(db->p_types.table, {
|
||||
tgt = node->datum;
|
||||
ret |= add_rule_auto(db, src, tgt, cls, perm, effect, not);
|
||||
})
|
||||
} else if (cls == NULL) {
|
||||
hashtab_for_each(db->p_classes.table, {
|
||||
cls = node->datum;
|
||||
ret |= add_rule_auto(db, src, tgt, cls, perm, effect, not);
|
||||
})
|
||||
} else {
|
||||
key.source_type = src->s.value;
|
||||
key.target_type = tgt->s.value;
|
||||
key.target_class = cls->s.value;
|
||||
key.specified = effect;
|
||||
return add_avrule(db, &key, perm ? perm->s.value : -1, not);
|
||||
}
|
||||
return ret;
|
||||
}
|
||||
|
||||
#define ioctl_driver(x) (x>>8 & 0xFF)
|
||||
#define ioctl_func(x) (x & 0xFF)
|
||||
|
||||
static int add_avxrule(policydb_t *db, avtab_key_t *key, uint16_t low, uint16_t high, int not) {
|
||||
avtab_datum_t *datum;
|
||||
avtab_extended_perms_t xperms;
|
||||
|
||||
memset(&xperms, 0, sizeof(xperms));
|
||||
if (ioctl_driver(low) != ioctl_driver(high)) {
|
||||
xperms.specified = AVTAB_XPERMS_IOCTLDRIVER;
|
||||
xperms.driver = 0;
|
||||
} else {
|
||||
xperms.specified = AVTAB_XPERMS_IOCTLFUNCTION;
|
||||
xperms.driver = ioctl_driver(low);
|
||||
}
|
||||
|
||||
if (xperms.specified == AVTAB_XPERMS_IOCTLDRIVER) {
|
||||
for (int i = ioctl_driver(low); i <= ioctl_driver(high); ++i) {
|
||||
if (not)
|
||||
xperm_clear(i, xperms.perms);
|
||||
else
|
||||
xperm_set(i, xperms.perms);
|
||||
}
|
||||
} else {
|
||||
for (int i = ioctl_func(low); i <= ioctl_func(high); ++i) {
|
||||
if (not)
|
||||
xperm_clear(i, xperms.perms);
|
||||
else
|
||||
xperm_set(i, xperms.perms);
|
||||
}
|
||||
}
|
||||
|
||||
datum = &get_avtab_node(db, key, &xperms)->datum;
|
||||
|
||||
if (datum->xperms == NULL)
|
||||
datum->xperms = xmalloc(sizeof(xperms));
|
||||
|
||||
memcpy(datum->xperms, &xperms, sizeof(xperms));
|
||||
return 0;
|
||||
}
|
||||
|
||||
static int add_xperm_rule_auto(policydb_t *db, type_datum_t *src, type_datum_t *tgt,
|
||||
class_datum_t *cls, uint16_t low, uint16_t high, int effect, int not) {
|
||||
avtab_key_t key;
|
||||
int ret = 0;
|
||||
|
||||
if (src == NULL) {
|
||||
hashtab_for_each(db->p_types.table, {
|
||||
src = node->datum;
|
||||
ret |= add_xperm_rule_auto(db, src, tgt, cls, low, high, effect, not);
|
||||
})
|
||||
} else if (tgt == NULL) {
|
||||
hashtab_for_each(db->p_types.table, {
|
||||
tgt = node->datum;
|
||||
ret |= add_xperm_rule_auto(db, src, tgt, cls, low, high, effect, not);
|
||||
})
|
||||
} else if (cls == NULL) {
|
||||
hashtab_for_each(db->p_classes.table, {
|
||||
cls = node->datum;
|
||||
ret |= add_xperm_rule_auto(db, src, tgt, cls, low, high, effect, not);
|
||||
})
|
||||
} else {
|
||||
key.source_type = src->s.value;
|
||||
key.target_type = tgt->s.value;
|
||||
key.target_class = cls->s.value;
|
||||
key.specified = effect;
|
||||
return add_avxrule(db, &key, low, high, not);
|
||||
}
|
||||
return ret;
|
||||
}
|
||||
|
||||
int create_domain(policydb_t *db, const char *d) {
|
||||
symtab_datum_t *src = hashtab_search(db->p_types.table, d);
|
||||
if (src) {
|
||||
LOGW("Domain %s already exists\n", d);
|
||||
return 0;
|
||||
}
|
||||
|
||||
type_datum_t *typedatum = xmalloc(sizeof(type_datum_t));
|
||||
type_datum_init(typedatum);
|
||||
typedatum->primary = 1;
|
||||
typedatum->flavor = TYPE_TYPE;
|
||||
|
||||
uint32_t value = 0;
|
||||
symtab_insert(db, SYM_TYPES, strdup(d), typedatum, SCOPE_DECL, 1, &value);
|
||||
typedatum->s.value = value;
|
||||
|
||||
if (ebitmap_set_bit(&db->global->branch_list->declared.scope[SYM_TYPES], value - 1, 1)) {
|
||||
return 1;
|
||||
}
|
||||
|
||||
db->type_attr_map = xrealloc(db->type_attr_map, sizeof(ebitmap_t) * db->p_types.nprim);
|
||||
db->attr_type_map = xrealloc(db->attr_type_map, sizeof(ebitmap_t) * db->p_types.nprim);
|
||||
ebitmap_init(&db->type_attr_map[value-1]);
|
||||
ebitmap_init(&db->attr_type_map[value-1]);
|
||||
ebitmap_set_bit(&db->type_attr_map[value-1], value-1, 1);
|
||||
|
||||
src = hashtab_search(db->p_types.table, d);
|
||||
if (!src)
|
||||
return 1;
|
||||
|
||||
if (policydb_index_decls(NULL, db))
|
||||
return 1;
|
||||
|
||||
if (policydb_index_classes(db))
|
||||
return 1;
|
||||
|
||||
if (policydb_index_others(NULL, db, 0))
|
||||
return 1;
|
||||
|
||||
// Add the domain to all roles
|
||||
for (unsigned i = 0; i < db->p_roles.nprim; ++i) {
|
||||
// Not sure all those three calls are needed
|
||||
ebitmap_set_bit(&db->role_val_to_struct[i]->types.negset, value - 1, 0);
|
||||
ebitmap_set_bit(&db->role_val_to_struct[i]->types.types, value - 1, 1);
|
||||
type_set_expand(&db->role_val_to_struct[i]->types, &db->role_val_to_struct[i]->cache, db, 0);
|
||||
}
|
||||
|
||||
return set_attr(db, "domain", value);
|
||||
}
|
||||
|
||||
int set_domain_state(policydb_t *db, const char *s, int state) {
|
||||
type_datum_t *type;
|
||||
if (s == NULL) {
|
||||
hashtab_for_each(db->p_types.table, {
|
||||
type = node->datum;
|
||||
if (ebitmap_set_bit(&db->permissive_map, type->s.value, state)) {
|
||||
LOGW("Could not set bit in permissive map\n");
|
||||
return 1;
|
||||
}
|
||||
})
|
||||
} else {
|
||||
type = hashtab_search(db->p_types.table, s);
|
||||
if (type == NULL) {
|
||||
LOGW("type %s does not exist\n", s);
|
||||
return 1;
|
||||
}
|
||||
if (ebitmap_set_bit(&db->permissive_map, type->s.value, state)) {
|
||||
LOGW("Could not set bit in permissive map\n");
|
||||
return 1;
|
||||
}
|
||||
}
|
||||
|
||||
return 0;
|
||||
}
|
||||
|
||||
int add_filename_trans(policydb_t *db, const char *s, const char *t, const char *c, const char *d,
|
||||
const char *o) {
|
||||
type_datum_t *src, *tgt, *def;
|
||||
class_datum_t *cls;
|
||||
|
||||
src = hashtab_search(db->p_types.table, s);
|
||||
if (src == NULL) {
|
||||
LOGW("source type %s does not exist\n", s);
|
||||
return 1;
|
||||
}
|
||||
tgt = hashtab_search(db->p_types.table, t);
|
||||
if (tgt == NULL) {
|
||||
LOGW("target type %s does not exist\n", t);
|
||||
return 1;
|
||||
}
|
||||
cls = hashtab_search(db->p_classes.table, c);
|
||||
if (cls == NULL) {
|
||||
LOGW("class %s does not exist\n", c);
|
||||
return 1;
|
||||
}
|
||||
def = hashtab_search(db->p_types.table, d);
|
||||
if (def == NULL) {
|
||||
LOGW("default type %s does not exist\n", d);
|
||||
return 1;
|
||||
}
|
||||
|
||||
filename_trans_t trans_key;
|
||||
trans_key.stype = src->s.value;
|
||||
trans_key.ttype = tgt->s.value;
|
||||
trans_key.tclass = cls->s.value;
|
||||
trans_key.name = (char *) o;
|
||||
|
||||
filename_trans_datum_t *trans_datum;
|
||||
trans_datum = hashtab_search(db->filename_trans, (hashtab_key_t) &trans_key);
|
||||
|
||||
if (trans_datum == NULL) {
|
||||
trans_datum = xcalloc(sizeof(*trans_datum), 1);
|
||||
hashtab_insert(db->filename_trans, (hashtab_key_t) &trans_key, trans_datum);
|
||||
}
|
||||
|
||||
// Overwrite existing
|
||||
trans_datum->otype = def->s.value;
|
||||
return 0;
|
||||
}
|
||||
|
||||
int add_typeattribute(policydb_t *db, const char *type, const char *attr) {
|
||||
type_datum_t *domain = hashtab_search(db->p_types.table, type);
|
||||
if (domain == NULL) {
|
||||
LOGW("type %s does not exist\n", type);
|
||||
return 1;
|
||||
}
|
||||
|
||||
int attr_id = set_attr(db, attr, domain->s.value);
|
||||
if (attr_id < 0)
|
||||
return 1;
|
||||
|
||||
hashtab_for_each(db->p_classes.table, {
|
||||
class_datum_t *cls = node->datum;
|
||||
for (constraint_node_t *n = cls->constraints; n ; n = n->next) {
|
||||
for (constraint_expr_t *e = n->expr; e; e = e->next) {
|
||||
if (e->expr_type == CEXPR_NAMES &&
|
||||
ebitmap_get_bit(&e->type_names->types, attr_id - 1)) {
|
||||
ebitmap_set_bit(&e->names, domain->s.value - 1, 1);
|
||||
}
|
||||
}
|
||||
}
|
||||
})
|
||||
|
||||
return 0;
|
||||
}
|
||||
|
||||
int add_rule(policydb_t *db,
|
||||
const char *s, const char *t, const char *c, const char *p, int effect, int n) {
|
||||
type_datum_t *src = NULL, *tgt = NULL;
|
||||
class_datum_t *cls = NULL;
|
||||
perm_datum_t *perm = NULL;
|
||||
|
||||
if (s) {
|
||||
src = hashtab_search(db->p_types.table, s);
|
||||
if (src == NULL) {
|
||||
LOGW("source type %s does not exist\n", s);
|
||||
return 1;
|
||||
}
|
||||
}
|
||||
|
||||
if (t) {
|
||||
tgt = hashtab_search(db->p_types.table, t);
|
||||
if (tgt == NULL) {
|
||||
LOGW("target type %s does not exist\n", t);
|
||||
return 1;
|
||||
}
|
||||
}
|
||||
|
||||
if (c) {
|
||||
cls = hashtab_search(db->p_classes.table, c);
|
||||
if (cls == NULL) {
|
||||
LOGW("class %s does not exist\n", c);
|
||||
return 1;
|
||||
}
|
||||
}
|
||||
|
||||
if (p) {
|
||||
if (c == NULL) {
|
||||
LOGW("No class is specified, cannot add perm [%s] \n", p);
|
||||
return 1;
|
||||
}
|
||||
|
||||
perm = hashtab_search(cls->permissions.table, p);
|
||||
if (perm == NULL && cls->comdatum != NULL) {
|
||||
perm = hashtab_search(cls->comdatum->permissions.table, p);
|
||||
}
|
||||
if (perm == NULL) {
|
||||
LOGW("perm %s does not exist in class %s\n", p, c);
|
||||
return 1;
|
||||
}
|
||||
}
|
||||
return add_rule_auto(db, src, tgt, cls, perm, effect, n);
|
||||
}
|
||||
|
||||
int add_xperm_rule(policydb_t *db, const char *s, const char *t, const char *c, const char *range,
|
||||
int effect, int n) {
|
||||
type_datum_t *src = NULL, *tgt = NULL;
|
||||
class_datum_t *cls = NULL;
|
||||
|
||||
if (s) {
|
||||
src = hashtab_search(db->p_types.table, s);
|
||||
if (src == NULL) {
|
||||
LOGW("source type %s does not exist\n", s);
|
||||
return 1;
|
||||
}
|
||||
}
|
||||
|
||||
if (t) {
|
||||
tgt = hashtab_search(db->p_types.table, t);
|
||||
if (tgt == NULL) {
|
||||
LOGW("target type %s does not exist\n", t);
|
||||
return 1;
|
||||
}
|
||||
}
|
||||
|
||||
if (c) {
|
||||
cls = hashtab_search(db->p_classes.table, c);
|
||||
if (cls == NULL) {
|
||||
LOGW("class %s does not exist\n", c);
|
||||
return 1;
|
||||
}
|
||||
}
|
||||
|
||||
uint16_t low, high;
|
||||
|
||||
if (range) {
|
||||
if (strchr(range, '-')){
|
||||
sscanf(range, "%hx-%hx", &low, &high);
|
||||
} else {
|
||||
sscanf(range, "%hx", &low);
|
||||
high = low;
|
||||
}
|
||||
} else {
|
||||
low = 0;
|
||||
high = 0xFFFF;
|
||||
}
|
||||
|
||||
return add_xperm_rule_auto(db, src, tgt, cls, low, high, effect, n);
|
||||
}
|
||||
|
||||
int add_type_rule(policydb_t *db,
|
||||
const char *s, const char *t, const char *c, const char *d, int effect) {
|
||||
type_datum_t *src, *tgt, *def;
|
||||
class_datum_t *cls;
|
||||
|
||||
src = hashtab_search(db->p_types.table, s);
|
||||
if (src == NULL) {
|
||||
LOGW("source type %s does not exist\n", s);
|
||||
return 1;
|
||||
}
|
||||
tgt = hashtab_search(db->p_types.table, t);
|
||||
if (tgt == NULL) {
|
||||
LOGW("target type %s does not exist\n", t);
|
||||
return 1;
|
||||
}
|
||||
cls = hashtab_search(db->p_classes.table, c);
|
||||
if (cls == NULL) {
|
||||
LOGW("class %s does not exist\n", c);
|
||||
return 1;
|
||||
}
|
||||
def = hashtab_search(db->p_types.table, d);
|
||||
if (def == NULL) {
|
||||
LOGW("default type %s does not exist\n", d);
|
||||
return 1;
|
||||
}
|
||||
|
||||
avtab_key_t key;
|
||||
key.source_type = src->s.value;
|
||||
key.target_type = tgt->s.value;
|
||||
key.target_class = cls->s.value;
|
||||
key.specified = effect;
|
||||
|
||||
avtab_ptr_t node = get_avtab_node(db, &key, NULL);
|
||||
node->datum.data = def->s.value;
|
||||
|
||||
return 0;
|
||||
}
|
||||
|
||||
int add_genfscon(policydb_t *db, const char *name, const char *path, const char *context) {
|
||||
// First try to create context
|
||||
context_struct_t *ctx;
|
||||
if (context_from_string(NULL, db, &ctx, context, strlen(context))) {
|
||||
LOGW("Failed to create context from string [%s]\n", context);
|
||||
return 1;
|
||||
}
|
||||
|
||||
// Allocate genfs context
|
||||
ocontext_t *newc = xcalloc(sizeof(*newc), 1);
|
||||
newc->u.name = strdup(path);
|
||||
memcpy(&newc->context[0], ctx, sizeof(*ctx));
|
||||
free(ctx);
|
||||
|
||||
// Find or allocate genfs
|
||||
genfs_t *last_gen = NULL;
|
||||
genfs_t *newfs = NULL;
|
||||
for (genfs_t *node = db->genfs; node; node = node->next) {
|
||||
if (strcmp(node->fstype, name) == 0) {
|
||||
newfs = node;
|
||||
break;
|
||||
}
|
||||
last_gen = node;
|
||||
}
|
||||
if (newfs == NULL) {
|
||||
newfs = xcalloc(sizeof(*newfs), 1);
|
||||
newfs->fstype = strdup(name);
|
||||
// Insert
|
||||
if (last_gen)
|
||||
last_gen->next = newfs;
|
||||
else
|
||||
db->genfs = newfs;
|
||||
}
|
||||
|
||||
// Insert or replace genfs context
|
||||
ocontext_t *last_ctx = NULL;
|
||||
for (ocontext_t *node = newfs->head; node; node = node->next) {
|
||||
if (strcmp(node->u.name, path) == 0) {
|
||||
// Unlink
|
||||
if (last_ctx)
|
||||
last_ctx->next = node->next;
|
||||
else
|
||||
newfs->head = NULL;
|
||||
// Destroy old node
|
||||
free(node->u.name);
|
||||
context_destroy(&node->context[0]);
|
||||
free(node);
|
||||
break;
|
||||
}
|
||||
last_ctx = node;
|
||||
}
|
||||
// Insert
|
||||
if (last_ctx)
|
||||
last_ctx->next = newc;
|
||||
else
|
||||
newfs->head = newc;
|
||||
|
||||
return 0;
|
||||
}
|
||||
|
||||
void strip_dontaudit(policydb_t *db) {
|
||||
avtab_for_each(&db->te_avtab, {
|
||||
if (node->key.specified == AVTAB_AUDITDENY || node->key.specified == AVTAB_XPERMS_DONTAUDIT)
|
||||
avtab_remove_node(&db->te_avtab, node);
|
||||
})
|
||||
}
|
||||
666
native/jni/magiskpolicy/sepolicy.cpp
Normal file
666
native/jni/magiskpolicy/sepolicy.cpp
Normal file
@ -0,0 +1,666 @@
|
||||
#include <sepol/policydb/policydb.h>
|
||||
|
||||
#include <magiskpolicy.hpp>
|
||||
#include <logging.hpp>
|
||||
#include <utils.hpp>
|
||||
|
||||
#include "sepolicy.hpp"
|
||||
|
||||
#if 0
|
||||
// Print out all rules going through public API for debugging
|
||||
template <typename ...Args>
|
||||
static void dprint(const char *action, Args ...args) {
|
||||
std::string s(action);
|
||||
for (int i = 0; i < sizeof...(args); ++i) s += " %s";
|
||||
s += "\n";
|
||||
LOGD(s.data(), (args ? args : "*")...);
|
||||
}
|
||||
#else
|
||||
#define dprint(...)
|
||||
#endif
|
||||
|
||||
template <typename T>
|
||||
struct auto_cast_wrapper
|
||||
{
|
||||
auto_cast_wrapper(T *ptr) : ptr(ptr) {}
|
||||
template <typename U>
|
||||
operator U*() const { return static_cast<U*>(ptr); }
|
||||
|
||||
private:
|
||||
T *ptr;
|
||||
};
|
||||
|
||||
template <typename T>
|
||||
static auto_cast_wrapper<T> auto_cast(T *p) {
|
||||
return auto_cast_wrapper<T>(p);
|
||||
}
|
||||
|
||||
static auto hashtab_find(hashtab_t h, const_hashtab_key_t key) {
|
||||
return auto_cast(hashtab_search(h, key));
|
||||
}
|
||||
|
||||
template <class Node, class Func>
|
||||
static void hash_for_each(Node **node_ptr, int n_slot, const Func &fn) {
|
||||
for (int i = 0; i < n_slot; ++i) {
|
||||
for (Node *cur = node_ptr[i]; cur; cur = cur->next) {
|
||||
fn(cur);
|
||||
}
|
||||
}
|
||||
}
|
||||
|
||||
#define hashtab_for_each(hashtab, fn) \
|
||||
hash_for_each((hashtab)->htable, (hashtab)->size, fn)
|
||||
|
||||
#define avtab_for_each(avtab, fn) \
|
||||
hash_for_each((avtab)->htable, (avtab)->nslot, fn)
|
||||
|
||||
// libsepol internal APIs
|
||||
extern "C" int policydb_index_decls(sepol_handle_t * handle, policydb_t * p);
|
||||
extern "C" int context_from_string(
|
||||
sepol_handle_t * handle,
|
||||
const policydb_t * policydb,
|
||||
context_struct_t ** cptr,
|
||||
const char *con_str, size_t con_str_len);
|
||||
extern "C" int type_set_expand(
|
||||
type_set_t * set, ebitmap_t * t, policydb_t * p,
|
||||
unsigned char alwaysexpand);
|
||||
|
||||
int sepol_impl::set_attr(const char *attr_name, int type_val) {
|
||||
type_datum_t *attr = hashtab_find(db->p_types.table, attr_name);
|
||||
if (!attr || attr->flavor != TYPE_ATTRIB)
|
||||
return -1;
|
||||
|
||||
if (ebitmap_set_bit(&db->type_attr_map[type_val - 1], attr->s.value - 1, 1))
|
||||
return -1;
|
||||
if (ebitmap_set_bit(&db->attr_type_map[attr->s.value - 1], type_val - 1, 1))
|
||||
return -1;
|
||||
|
||||
return attr->s.value;
|
||||
}
|
||||
|
||||
void sepol_impl::check_avtab_node(avtab_ptr_t node) {
|
||||
bool redundant;
|
||||
if (node->key.specified == AVTAB_AUDITDENY)
|
||||
redundant = node->datum.data == ~0U;
|
||||
else if (node->key.specified & AVTAB_XPERMS)
|
||||
redundant = node->datum.xperms == nullptr;
|
||||
else
|
||||
redundant = node->datum.data == 0U;
|
||||
if (redundant)
|
||||
avtab_remove_node(&db->te_avtab, node);
|
||||
}
|
||||
|
||||
avtab_ptr_t sepol_impl::get_avtab_node(avtab_key_t *key, avtab_extended_perms_t *xperms) {
|
||||
avtab_ptr_t node;
|
||||
|
||||
/* AVTAB_XPERMS entries are not necessarily unique */
|
||||
if (key->specified & AVTAB_XPERMS) {
|
||||
bool match = false;
|
||||
node = avtab_search_node(&db->te_avtab, key);
|
||||
while (node) {
|
||||
if ((node->datum.xperms->specified == xperms->specified) &&
|
||||
(node->datum.xperms->driver == xperms->driver)) {
|
||||
match = true;
|
||||
break;
|
||||
}
|
||||
node = avtab_search_node_next(node, key->specified);
|
||||
}
|
||||
if (!match)
|
||||
node = nullptr;
|
||||
} else {
|
||||
node = avtab_search_node(&db->te_avtab, key);
|
||||
}
|
||||
|
||||
if (!node) {
|
||||
avtab_datum_t avdatum{};
|
||||
/*
|
||||
* AUDITDENY, aka DONTAUDIT, are &= assigned, versus |= for
|
||||
* others. Initialize the data accordingly.
|
||||
*/
|
||||
avdatum.data = key->specified == AVTAB_AUDITDENY ? ~0U : 0U;
|
||||
/* this is used to get the node - insertion is actually unique */
|
||||
node = avtab_insert_nonunique(&db->te_avtab, key, &avdatum);
|
||||
}
|
||||
|
||||
return node;
|
||||
}
|
||||
|
||||
int sepol_impl::add_avrule(avtab_key_t *key, int val, bool n) {
|
||||
avtab_ptr_t node = get_avtab_node(key, nullptr);
|
||||
|
||||
if (n) {
|
||||
if (val < 0)
|
||||
node->datum.data = 0U;
|
||||
else
|
||||
node->datum.data &= ~(1U << (val - 1));
|
||||
} else {
|
||||
if (val < 0)
|
||||
node->datum.data = ~0U;
|
||||
else
|
||||
node->datum.data |= 1U << (val - 1);
|
||||
}
|
||||
|
||||
check_avtab_node(node);
|
||||
return 0;
|
||||
}
|
||||
|
||||
int sepol_impl::add_rule(type_datum_t *src, type_datum_t *tgt, class_datum_t *cls, perm_datum_t *perm, int effect, bool n) {
|
||||
int ret = 0;
|
||||
|
||||
if (src == nullptr) {
|
||||
hashtab_for_each(db->p_types.table, [&](hashtab_ptr_t node) {
|
||||
src = auto_cast(node->datum);
|
||||
ret |= add_rule(src, tgt, cls, perm, effect, n);
|
||||
});
|
||||
} else if (tgt == nullptr) {
|
||||
hashtab_for_each(db->p_types.table, [&](hashtab_ptr_t node) {
|
||||
tgt = auto_cast(node->datum);
|
||||
ret |= add_rule(src, tgt, cls, perm, effect, n);
|
||||
});
|
||||
} else if (cls == nullptr) {
|
||||
hashtab_for_each(db->p_classes.table, [&](hashtab_ptr_t node) {
|
||||
cls = auto_cast(node->datum);
|
||||
ret |= add_rule(src, tgt, cls, perm, effect, n);
|
||||
});
|
||||
} else {
|
||||
avtab_key_t key;
|
||||
key.source_type = src->s.value;
|
||||
key.target_type = tgt->s.value;
|
||||
key.target_class = cls->s.value;
|
||||
key.specified = effect;
|
||||
return add_avrule(&key, perm ? perm->s.value : -1, n);
|
||||
}
|
||||
|
||||
return ret;
|
||||
}
|
||||
|
||||
int sepol_impl::add_rule(const char *s, const char *t, const char *c, const char *p, int effect, bool n) {
|
||||
type_datum_t *src = nullptr, *tgt = nullptr;
|
||||
class_datum_t *cls = nullptr;
|
||||
perm_datum_t *perm = nullptr;
|
||||
|
||||
if (s) {
|
||||
src = hashtab_find(db->p_types.table, s);
|
||||
if (src == nullptr) {
|
||||
LOGW("source type %s does not exist\n", s);
|
||||
return 1;
|
||||
}
|
||||
}
|
||||
|
||||
if (t) {
|
||||
tgt = hashtab_find(db->p_types.table, t);
|
||||
if (tgt == nullptr) {
|
||||
LOGW("target type %s does not exist\n", t);
|
||||
return 1;
|
||||
}
|
||||
}
|
||||
|
||||
if (c) {
|
||||
cls = hashtab_find(db->p_classes.table, c);
|
||||
if (cls == nullptr) {
|
||||
LOGW("class %s does not exist\n", c);
|
||||
return 1;
|
||||
}
|
||||
}
|
||||
|
||||
if (p) {
|
||||
if (c == nullptr) {
|
||||
LOGW("No class is specified, cannot add perm [%s] \n", p);
|
||||
return 1;
|
||||
}
|
||||
|
||||
perm = hashtab_find(cls->permissions.table, p);
|
||||
if (perm == nullptr && cls->comdatum != nullptr) {
|
||||
perm = hashtab_find(cls->comdatum->permissions.table, p);
|
||||
}
|
||||
if (perm == nullptr) {
|
||||
LOGW("perm %s does not exist in class %s\n", p, c);
|
||||
return 1;
|
||||
}
|
||||
}
|
||||
return add_rule(src, tgt, cls, perm, effect, n);
|
||||
}
|
||||
|
||||
#define ioctl_driver(x) (x>>8 & 0xFF)
|
||||
#define ioctl_func(x) (x & 0xFF)
|
||||
|
||||
int sepol_impl::add_avxrule(avtab_key_t *key, uint16_t low, uint16_t high, bool n) {
|
||||
avtab_datum_t *datum;
|
||||
avtab_extended_perms_t xperms;
|
||||
|
||||
memset(&xperms, 0, sizeof(xperms));
|
||||
if (ioctl_driver(low) != ioctl_driver(high)) {
|
||||
xperms.specified = AVTAB_XPERMS_IOCTLDRIVER;
|
||||
xperms.driver = 0;
|
||||
} else {
|
||||
xperms.specified = AVTAB_XPERMS_IOCTLFUNCTION;
|
||||
xperms.driver = ioctl_driver(low);
|
||||
}
|
||||
|
||||
if (xperms.specified == AVTAB_XPERMS_IOCTLDRIVER) {
|
||||
for (int i = ioctl_driver(low); i <= ioctl_driver(high); ++i) {
|
||||
if (n)
|
||||
xperm_clear(i, xperms.perms);
|
||||
else
|
||||
xperm_set(i, xperms.perms);
|
||||
}
|
||||
} else {
|
||||
for (int i = ioctl_func(low); i <= ioctl_func(high); ++i) {
|
||||
if (n)
|
||||
xperm_clear(i, xperms.perms);
|
||||
else
|
||||
xperm_set(i, xperms.perms);
|
||||
}
|
||||
}
|
||||
|
||||
datum = &get_avtab_node(key, &xperms)->datum;
|
||||
|
||||
if (datum->xperms == nullptr)
|
||||
datum->xperms = auto_cast(xmalloc(sizeof(xperms)));
|
||||
|
||||
memcpy(datum->xperms, &xperms, sizeof(xperms));
|
||||
return 0;
|
||||
}
|
||||
|
||||
int sepol_impl::add_xperm_rule(type_datum_t *src, type_datum_t *tgt,
|
||||
class_datum_t *cls, uint16_t low, uint16_t high, int effect, bool n) {
|
||||
int ret = 0;
|
||||
if (src == nullptr) {
|
||||
hashtab_for_each(db->p_types.table, [&](hashtab_ptr_t node) {
|
||||
src = auto_cast(node->datum);
|
||||
ret |= add_xperm_rule(src, tgt, cls, low, high, effect, n);
|
||||
});
|
||||
} else if (tgt == nullptr) {
|
||||
hashtab_for_each(db->p_types.table, [&](hashtab_ptr_t node) {
|
||||
tgt = auto_cast(node->datum);
|
||||
ret |= add_xperm_rule(src, tgt, cls, low, high, effect, n);
|
||||
});
|
||||
} else if (cls == nullptr) {
|
||||
hashtab_for_each(db->p_classes.table, [&](hashtab_ptr_t node) {
|
||||
tgt = auto_cast(node->datum);
|
||||
ret |= add_xperm_rule(src, tgt, cls, low, high, effect, n);
|
||||
});
|
||||
} else {
|
||||
avtab_key_t key;
|
||||
key.source_type = src->s.value;
|
||||
key.target_type = tgt->s.value;
|
||||
key.target_class = cls->s.value;
|
||||
key.specified = effect;
|
||||
return add_avxrule(&key, low, high, n);
|
||||
}
|
||||
return ret;
|
||||
}
|
||||
|
||||
int sepol_impl::add_xperm_rule(const char *s, const char *t, const char *c, const char *range, int effect, bool n) {
|
||||
type_datum_t *src = nullptr, *tgt = nullptr;
|
||||
class_datum_t *cls = nullptr;
|
||||
|
||||
if (s) {
|
||||
src = hashtab_find(db->p_types.table, s);
|
||||
if (src == nullptr) {
|
||||
LOGW("source type %s does not exist\n", s);
|
||||
return 1;
|
||||
}
|
||||
}
|
||||
|
||||
if (t) {
|
||||
tgt = hashtab_find(db->p_types.table, t);
|
||||
if (tgt == nullptr) {
|
||||
LOGW("target type %s does not exist\n", t);
|
||||
return 1;
|
||||
}
|
||||
}
|
||||
|
||||
if (c) {
|
||||
cls = hashtab_find(db->p_classes.table, c);
|
||||
if (cls == nullptr) {
|
||||
LOGW("class %s does not exist\n", c);
|
||||
return 1;
|
||||
}
|
||||
}
|
||||
|
||||
uint16_t low, high;
|
||||
|
||||
if (range) {
|
||||
if (strchr(range, '-')){
|
||||
sscanf(range, "%hx-%hx", &low, &high);
|
||||
} else {
|
||||
sscanf(range, "%hx", &low);
|
||||
high = low;
|
||||
}
|
||||
} else {
|
||||
low = 0;
|
||||
high = 0xFFFF;
|
||||
}
|
||||
|
||||
return add_xperm_rule(src, tgt, cls, low, high, effect, n);
|
||||
}
|
||||
|
||||
int sepol_impl::create_domain(const char *type_name) {
|
||||
symtab_datum_t *src = hashtab_find(db->p_types.table, type_name);
|
||||
if (src) {
|
||||
LOGW("Type %s already exists\n", type_name);
|
||||
return 0;
|
||||
}
|
||||
|
||||
type_datum_t *type = auto_cast(xmalloc(sizeof(type_datum_t)));
|
||||
type_datum_init(type);
|
||||
type->primary = 1;
|
||||
type->flavor = TYPE_TYPE;
|
||||
|
||||
uint32_t value = 0;
|
||||
symtab_insert(db, SYM_TYPES, strdup(type_name), type, SCOPE_DECL, 1, &value);
|
||||
type->s.value = value;
|
||||
|
||||
if (ebitmap_set_bit(&db->global->branch_list->declared.scope[SYM_TYPES], value - 1, 1)) {
|
||||
return 1;
|
||||
}
|
||||
|
||||
db->type_attr_map = auto_cast(xrealloc(db->type_attr_map, sizeof(ebitmap_t) * db->p_types.nprim));
|
||||
db->attr_type_map = auto_cast(xrealloc(db->attr_type_map, sizeof(ebitmap_t) * db->p_types.nprim));
|
||||
ebitmap_init(&db->type_attr_map[value - 1]);
|
||||
ebitmap_init(&db->attr_type_map[value - 1]);
|
||||
ebitmap_set_bit(&db->type_attr_map[value - 1], value - 1, 1);
|
||||
|
||||
src = hashtab_find(db->p_types.table, type_name);
|
||||
if (!src)
|
||||
return 1;
|
||||
|
||||
if (policydb_index_decls(nullptr, db))
|
||||
return 1;
|
||||
|
||||
if (policydb_index_classes(db))
|
||||
return 1;
|
||||
|
||||
if (policydb_index_others(nullptr, db, 0))
|
||||
return 1;
|
||||
|
||||
// Add the domain to all roles
|
||||
for (unsigned i = 0; i < db->p_roles.nprim; ++i) {
|
||||
// Not sure all those three calls are needed
|
||||
ebitmap_set_bit(&db->role_val_to_struct[i]->types.negset, value - 1, 0);
|
||||
ebitmap_set_bit(&db->role_val_to_struct[i]->types.types, value - 1, 1);
|
||||
type_set_expand(&db->role_val_to_struct[i]->types, &db->role_val_to_struct[i]->cache, db, 0);
|
||||
}
|
||||
|
||||
return set_attr("domain", value);
|
||||
}
|
||||
|
||||
int sepol_impl::set_domain_state(const char *s, bool permissive) {
|
||||
type_datum_t *type;
|
||||
if (s == nullptr) {
|
||||
hashtab_for_each(db->p_types.table, [&](hashtab_ptr_t node) {
|
||||
type = auto_cast(node->datum);
|
||||
if (ebitmap_set_bit(&db->permissive_map, type->s.value, permissive))
|
||||
LOGW("Could not set bit in permissive map\n");
|
||||
});
|
||||
} else {
|
||||
type = hashtab_find(db->p_types.table, s);
|
||||
if (type == nullptr) {
|
||||
LOGW("type %s does not exist\n", s);
|
||||
return 1;
|
||||
}
|
||||
if (ebitmap_set_bit(&db->permissive_map, type->s.value, permissive)) {
|
||||
LOGW("Could not set bit in permissive map\n");
|
||||
return 1;
|
||||
}
|
||||
}
|
||||
return 0;
|
||||
}
|
||||
|
||||
int sepol_impl::add_filename_trans(const char *s, const char *t, const char *c, const char *d, const char *o) {
|
||||
type_datum_t *src, *tgt, *def;
|
||||
class_datum_t *cls;
|
||||
filename_trans_datum_t *trans;
|
||||
|
||||
src = hashtab_find(db->p_types.table, s);
|
||||
if (src == nullptr) {
|
||||
LOGW("source type %s does not exist\n", s);
|
||||
return 1;
|
||||
}
|
||||
tgt = hashtab_find(db->p_types.table, t);
|
||||
if (tgt == nullptr) {
|
||||
LOGW("target type %s does not exist\n", t);
|
||||
return 1;
|
||||
}
|
||||
cls = hashtab_find(db->p_classes.table, c);
|
||||
if (cls == nullptr) {
|
||||
LOGW("class %s does not exist\n", c);
|
||||
return 1;
|
||||
}
|
||||
def = hashtab_find(db->p_types.table, d);
|
||||
if (def == nullptr) {
|
||||
LOGW("default type %s does not exist\n", d);
|
||||
return 1;
|
||||
}
|
||||
|
||||
filename_trans_t trans_key;
|
||||
trans_key.stype = src->s.value;
|
||||
trans_key.ttype = tgt->s.value;
|
||||
trans_key.tclass = cls->s.value;
|
||||
trans_key.name = (char *) o;
|
||||
|
||||
trans = hashtab_find(db->filename_trans, (hashtab_key_t) &trans_key);
|
||||
|
||||
if (trans == nullptr) {
|
||||
trans = auto_cast(xcalloc(sizeof(*trans), 1));
|
||||
hashtab_insert(db->filename_trans, (hashtab_key_t) &trans_key, trans);
|
||||
}
|
||||
|
||||
// Overwrite existing
|
||||
trans->otype = def->s.value;
|
||||
return 0;
|
||||
}
|
||||
|
||||
int sepol_impl::add_typeattribute(const char *type, const char *attr) {
|
||||
type_datum_t *domain = hashtab_find(db->p_types.table, type);
|
||||
if (domain == nullptr) {
|
||||
LOGW("type %s does not exist\n", type);
|
||||
return 1;
|
||||
}
|
||||
|
||||
int attr_val = set_attr(attr, domain->s.value);
|
||||
if (attr_val < 0)
|
||||
return 1;
|
||||
|
||||
hashtab_for_each(db->p_classes.table, [&](hashtab_ptr_t node){
|
||||
auto cls = static_cast<class_datum_t *>(node->datum);
|
||||
for (constraint_node_t *n = cls->constraints; n ; n = n->next) {
|
||||
for (constraint_expr_t *e = n->expr; e; e = e->next) {
|
||||
if (e->expr_type == CEXPR_NAMES &&
|
||||
ebitmap_get_bit(&e->type_names->types, attr_val - 1)) {
|
||||
ebitmap_set_bit(&e->names, domain->s.value - 1, 1);
|
||||
}
|
||||
}
|
||||
}
|
||||
});
|
||||
return 0;
|
||||
}
|
||||
|
||||
int sepol_impl::add_type_rule(const char *s, const char *t, const char *c, const char *d, int effect) {
|
||||
type_datum_t *src, *tgt, *def;
|
||||
class_datum_t *cls;
|
||||
|
||||
src = hashtab_find(db->p_types.table, s);
|
||||
if (src == nullptr) {
|
||||
LOGW("source type %s does not exist\n", s);
|
||||
return 1;
|
||||
}
|
||||
tgt = hashtab_find(db->p_types.table, t);
|
||||
if (tgt == nullptr) {
|
||||
LOGW("target type %s does not exist\n", t);
|
||||
return 1;
|
||||
}
|
||||
cls = hashtab_find(db->p_classes.table, c);
|
||||
if (cls == nullptr) {
|
||||
LOGW("class %s does not exist\n", c);
|
||||
return 1;
|
||||
}
|
||||
def = hashtab_find(db->p_types.table, d);
|
||||
if (def == nullptr) {
|
||||
LOGW("default type %s does not exist\n", d);
|
||||
return 1;
|
||||
}
|
||||
|
||||
avtab_key_t key;
|
||||
key.source_type = src->s.value;
|
||||
key.target_type = tgt->s.value;
|
||||
key.target_class = cls->s.value;
|
||||
key.specified = effect;
|
||||
|
||||
avtab_ptr_t node = get_avtab_node(&key, nullptr);
|
||||
node->datum.data = def->s.value;
|
||||
|
||||
return 0;
|
||||
}
|
||||
|
||||
int sepol_impl::add_genfscon(const char *fs_name, const char *path, const char *context) {
|
||||
// First try to create context
|
||||
context_struct_t *ctx;
|
||||
if (context_from_string(nullptr, db, &ctx, context, strlen(context))) {
|
||||
LOGW("Failed to create context from string [%s]\n", context);
|
||||
return 1;
|
||||
}
|
||||
|
||||
// Allocate genfs context
|
||||
ocontext_t *newc = auto_cast(xcalloc(sizeof(*newc), 1));
|
||||
newc->u.name = strdup(path);
|
||||
memcpy(&newc->context[0], ctx, sizeof(*ctx));
|
||||
free(ctx);
|
||||
|
||||
// Find or allocate genfs
|
||||
genfs_t *last_gen = nullptr;
|
||||
genfs_t *newfs = nullptr;
|
||||
for (genfs_t *node = db->genfs; node; node = node->next) {
|
||||
if (strcmp(node->fstype, fs_name) == 0) {
|
||||
newfs = node;
|
||||
break;
|
||||
}
|
||||
last_gen = node;
|
||||
}
|
||||
if (newfs == nullptr) {
|
||||
newfs = auto_cast(xcalloc(sizeof(*newfs), 1));
|
||||
newfs->fstype = strdup(fs_name);
|
||||
// Insert
|
||||
if (last_gen)
|
||||
last_gen->next = newfs;
|
||||
else
|
||||
db->genfs = newfs;
|
||||
}
|
||||
|
||||
// Insert or replace genfs context
|
||||
ocontext_t *last_ctx = nullptr;
|
||||
for (ocontext_t *node = newfs->head; node; node = node->next) {
|
||||
if (strcmp(node->u.name, path) == 0) {
|
||||
// Unlink
|
||||
if (last_ctx)
|
||||
last_ctx->next = node->next;
|
||||
else
|
||||
newfs->head = nullptr;
|
||||
// Destroy old node
|
||||
free(node->u.name);
|
||||
context_destroy(&node->context[0]);
|
||||
free(node);
|
||||
break;
|
||||
}
|
||||
last_ctx = node;
|
||||
}
|
||||
// Insert
|
||||
if (last_ctx)
|
||||
last_ctx->next = newc;
|
||||
else
|
||||
newfs->head = newc;
|
||||
|
||||
return 0;
|
||||
}
|
||||
|
||||
void sepol_impl::strip_dontaudit() {
|
||||
avtab_for_each(&db->te_avtab, [=](avtab_ptr_t node) {
|
||||
if (node->key.specified == AVTAB_AUDITDENY || node->key.specified == AVTAB_XPERMS_DONTAUDIT)
|
||||
avtab_remove_node(&db->te_avtab, node);
|
||||
});
|
||||
}
|
||||
|
||||
int sepolicy::allow(const char *s, const char *t, const char *c, const char *p) {
|
||||
dprint(__FUNCTION__, s, t, c, p);
|
||||
return impl->add_rule(s, t, c, p, AVTAB_ALLOWED, false);
|
||||
}
|
||||
|
||||
int sepolicy::deny(const char *s, const char *t, const char *c, const char *p) {
|
||||
dprint(__FUNCTION__, s, t, c, p);
|
||||
return impl->add_rule(s, t, c, p, AVTAB_ALLOWED, true);
|
||||
}
|
||||
|
||||
int sepolicy::auditallow(const char *s, const char *t, const char *c, const char *p) {
|
||||
dprint(__FUNCTION__, s, t, c, p);
|
||||
return impl->add_rule(s, t, c, p, AVTAB_AUDITALLOW, false);
|
||||
}
|
||||
|
||||
int sepolicy::dontaudit(const char *s, const char *t, const char *c, const char *p) {
|
||||
dprint(__FUNCTION__, s, t, c, p);
|
||||
return impl->add_rule(s, t, c, p, AVTAB_AUDITDENY, true);
|
||||
}
|
||||
|
||||
int sepolicy::allowxperm(const char *s, const char *t, const char *c, const char *range) {
|
||||
dprint(__FUNCTION__, s, t, c, "ioctl", range);
|
||||
return impl->add_xperm_rule(s, t, c, range, AVTAB_XPERMS_ALLOWED, false);
|
||||
}
|
||||
|
||||
int sepolicy::auditallowxperm(const char *s, const char *t, const char *c, const char *range) {
|
||||
dprint(__FUNCTION__, s, t, c, "ioctl", range);
|
||||
return impl->add_xperm_rule(s, t, c, range, AVTAB_XPERMS_AUDITALLOW, false);
|
||||
}
|
||||
|
||||
int sepolicy::dontauditxperm(const char *s, const char *t, const char *c, const char *range) {
|
||||
dprint(__FUNCTION__, s, t, c, "ioctl", range);
|
||||
return impl->add_xperm_rule(s, t, c, range, AVTAB_XPERMS_DONTAUDIT, false);
|
||||
}
|
||||
|
||||
int sepolicy::type_change(const char *s, const char *t, const char *c, const char *d) {
|
||||
dprint(__FUNCTION__, s, t, c, d);
|
||||
return impl->add_type_rule(s, t, c, d, AVTAB_CHANGE);
|
||||
}
|
||||
|
||||
int sepolicy::type_member(const char *s, const char *t, const char *c, const char *d) {
|
||||
dprint(__FUNCTION__, s, t, c, d);
|
||||
return impl->add_type_rule(s, t, c, d, AVTAB_MEMBER);
|
||||
}
|
||||
|
||||
int sepolicy::type_transition(const char *s, const char *t, const char *c, const char *d, const char *o) {
|
||||
if (o) {
|
||||
dprint(__FUNCTION__, s, t, c, d);
|
||||
return impl->add_type_rule(s, t, c, d, AVTAB_TRANSITION);
|
||||
} else {
|
||||
dprint(__FUNCTION__, s, t, c, d, o);
|
||||
return impl->add_filename_trans(s, t, c, d, o);
|
||||
}
|
||||
}
|
||||
|
||||
int sepolicy::permissive(const char *s) {
|
||||
dprint(__FUNCTION__, s);
|
||||
return impl->set_domain_state(s, true);
|
||||
}
|
||||
|
||||
int sepolicy::enforce(const char *s) {
|
||||
dprint(__FUNCTION__, s);
|
||||
return impl->set_domain_state(s, false);
|
||||
}
|
||||
|
||||
int sepolicy::create(const char *s) {
|
||||
dprint(__FUNCTION__, s);
|
||||
return impl->create_domain(s);
|
||||
}
|
||||
|
||||
int sepolicy::typeattribute(const char *type, const char *attr) {
|
||||
dprint(__FUNCTION__, type, attr);
|
||||
return impl->add_typeattribute(type, attr);
|
||||
}
|
||||
|
||||
int sepolicy::genfscon(const char *fs_name, const char *path, const char *ctx) {
|
||||
dprint(__FUNCTION__, fs_name, path, ctx);
|
||||
return impl->add_genfscon(fs_name, path, ctx);
|
||||
}
|
||||
|
||||
int sepolicy::exists(const char *source) {
|
||||
return hashtab_search(db->p_types.table, source) != nullptr;
|
||||
}
|
||||
@ -1,24 +0,0 @@
|
||||
#pragma once
|
||||
|
||||
#include <sepol/policydb/policydb.h>
|
||||
|
||||
__BEGIN_DECLS
|
||||
|
||||
// Internal C APIs, do not use directly
|
||||
int create_domain(policydb_t *db, const char *d);
|
||||
int set_domain_state(policydb_t *db, const char *s, int state);
|
||||
int add_typeattribute(policydb_t *db, const char *type, const char *attr);
|
||||
int add_rule(policydb_t *db, const char *s, const char *t, const char *c, const char *p, int effect,
|
||||
int n);
|
||||
int add_xperm_rule(policydb_t *db, const char *s, const char *t, const char *c, const char *range,
|
||||
int effect, int n);
|
||||
int add_type_rule(policydb_t *db, const char *s, const char *t, const char *c, const char *d,
|
||||
int effect);
|
||||
int add_filename_trans(policydb_t *db, const char *s, const char *t, const char *c, const char *d,
|
||||
const char *o);
|
||||
int add_genfscon(policydb_t *db, const char *name, const char *path, const char *context);
|
||||
void strip_dontaudit(policydb_t *db);
|
||||
|
||||
void statement_help();
|
||||
|
||||
__END_DECLS
|
||||
30
native/jni/magiskpolicy/sepolicy.hpp
Normal file
30
native/jni/magiskpolicy/sepolicy.hpp
Normal file
@ -0,0 +1,30 @@
|
||||
#pragma once
|
||||
|
||||
#include <sepol/policydb/policydb.h>
|
||||
#include <magiskpolicy.hpp>
|
||||
|
||||
// Internal APIs, do not use directly
|
||||
struct sepol_impl : public sepolicy {
|
||||
int set_attr(const char *attr_name, int type_val);
|
||||
void check_avtab_node(avtab_ptr_t node);
|
||||
avtab_ptr_t get_avtab_node(avtab_key_t *key, avtab_extended_perms_t *xperms);
|
||||
int add_avrule(avtab_key_t *key, int val, bool n);
|
||||
int add_rule(const char *s, const char *t, const char *c, const char *p, int effect, bool n);
|
||||
int add_rule(type_datum_t *src, type_datum_t *tgt, class_datum_t *cls, perm_datum_t *perm, int effect, bool n);
|
||||
int add_avxrule(avtab_key_t *key, uint16_t low, uint16_t high, bool n);
|
||||
int add_xperm_rule(type_datum_t *src, type_datum_t *tgt,
|
||||
class_datum_t *cls, uint16_t low, uint16_t high, int effect, bool n);
|
||||
int add_xperm_rule(const char *s, const char *t, const char *c, const char *range, int effect, bool n);
|
||||
int create_domain(const char *type_name);
|
||||
int set_domain_state(const char *s, bool permissive);
|
||||
int add_filename_trans(const char *s, const char *t, const char *c, const char *d, const char *o);
|
||||
int add_typeattribute(const char *type, const char *attr);
|
||||
int add_type_rule(const char *s, const char *t, const char *c, const char *d, int effect);
|
||||
int add_genfscon(const char *fs_name, const char *path, const char *context);
|
||||
void strip_dontaudit();
|
||||
void allow_su_client(const char *type);
|
||||
};
|
||||
|
||||
#define impl static_cast<sepol_impl *>(this)
|
||||
|
||||
void statement_help();
|
||||
@ -6,7 +6,7 @@
|
||||
#include <logging.hpp>
|
||||
#include <utils.hpp>
|
||||
|
||||
#include "sepolicy.h"
|
||||
#include "sepolicy.hpp"
|
||||
|
||||
using namespace std;
|
||||
|
||||
|
||||
Loading…
Reference in New Issue
Block a user