mirror of
https://github.com/topjohnwu/Magisk.git
synced 2025-01-04 16:27:39 +00:00
Merge magiskpolicy into Magisk main repo
This commit is contained in:
topjohnwu
commit
7cec8baa55
71
native/jni/magiskpolicy/api.c
Normal file
71
native/jni/magiskpolicy/api.c
Normal file
@ -0,0 +1,71 @@
|
||||
#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);
|
||||
}
|
||||
484
native/jni/magiskpolicy/magiskpolicy.c
Normal file
484
native/jni/magiskpolicy/magiskpolicy.c
Normal file
@ -0,0 +1,484 @@
|
||||
/* magiskpolicy.c - Main function for policy patching
|
||||
*
|
||||
* Includes all the parsing logic for the policy statements
|
||||
*/
|
||||
|
||||
#include "magiskpolicy.h"
|
||||
#include "sepolicy.h"
|
||||
#include "magisk.h"
|
||||
|
||||
static int syntax_err = 0;
|
||||
static char err_msg[ARG_MAX];
|
||||
|
||||
static void statements() {
|
||||
fprintf(stderr,
|
||||
"One policy statement should be treated as one parameter;\n"
|
||||
"this means a full policy statement should be enclosed in quotes;\n"
|
||||
"multiple policy statements can be provided in a single command\n"
|
||||
"\n"
|
||||
"The statements has a format of \"<action> [args...]\"\n"
|
||||
"Use '*' in args to represent every possible match.\n"
|
||||
"Collections wrapped in curly brackets can also be used as args.\n"
|
||||
"\n"
|
||||
"Supported policy statements:\n"
|
||||
"\n"
|
||||
"Type 1:\n"
|
||||
"\"<action> source-class target-class permission-class permission\"\n"
|
||||
"Action: allow, deny, auditallow, auditdeny\n"
|
||||
"\n"
|
||||
"Type 2:\n"
|
||||
"\"<action> source-class target-class permission-class ioctl range\"\n"
|
||||
"Action: allowxperm, auditallowxperm, dontauditxperm\n"
|
||||
"\n"
|
||||
"Type 3:\n"
|
||||
"\"<action> class\"\n"
|
||||
"Action: create, permissive, enforcing\n"
|
||||
"\n"
|
||||
"Type 4:\n"
|
||||
"\"attradd class attribute\"\n"
|
||||
"\n"
|
||||
"Type 5:\n"
|
||||
"\"typetrans source-class target-class permission-class default-class (optional: object-name)\"\n"
|
||||
"\n"
|
||||
"Notes:\n"
|
||||
"- typetrans does not support the all match '*' syntax\n"
|
||||
"- permission-class cannot be collections\n"
|
||||
"- source-class and target-class can also be attributes\n"
|
||||
"\n"
|
||||
"Example: allow { source1 source2 } { target1 target2 } permission-class *\n"
|
||||
"Will be expanded to:\n"
|
||||
"\n"
|
||||
"allow source1 target1 permission-class { all-permissions }\n"
|
||||
"allow source1 target2 permission-class { all-permissions }\n"
|
||||
"allow source2 target1 permission-class { all-permissions }\n"
|
||||
"allow source2 target2 permission-class { all-permissions }\n"
|
||||
"\n"
|
||||
);
|
||||
}
|
||||
|
||||
static void usage(char *arg0) {
|
||||
fprintf(stderr,
|
||||
"MagiskPolicy v" xstr(MAGISK_VERSION) "(" xstr(MAGISK_VER_CODE) ") (by topjohnwu)\n\n"
|
||||
"Usage: %s [--options...] [policystatements...]\n\n"
|
||||
"Options:\n"
|
||||
" --live directly apply patched policy live\n"
|
||||
" --magisk built-in rules for a Magisk selinux environment\n"
|
||||
" --load FILE load policies from <infile>\n"
|
||||
" --save FILE save policies to <outfile>\n\n"
|
||||
"If no input file is specified, it will load from current policies\n"
|
||||
"If neither --live nor --save is specified, nothing will happen\n\n"
|
||||
, arg0);
|
||||
statements();
|
||||
exit(1);
|
||||
}
|
||||
|
||||
// Pattern 1: action { source } { target } class { permission }
|
||||
static int parse_pattern_1(int action, char* statement) {
|
||||
int state = 0, in_bracket = 0;
|
||||
char *tok, *class, *saveptr;
|
||||
struct vector source, target, permission;
|
||||
vec_init(&source);
|
||||
vec_init(&target);
|
||||
vec_init(&permission);
|
||||
tok = strtok_r(statement, " ", &saveptr);
|
||||
while (tok != NULL) {
|
||||
if (tok[0] == '{') {
|
||||
if (in_bracket || state == 2) return 1;
|
||||
in_bracket = 1;
|
||||
if (tok[1]) {
|
||||
++tok;
|
||||
continue;
|
||||
}
|
||||
} else if (tok[strlen(tok) - 1] == '}') {
|
||||
if (!in_bracket || state == 2) return 1;
|
||||
in_bracket = 0;
|
||||
if (strlen(tok) - 1) {
|
||||
tok[strlen(tok) - 1] = '\0';
|
||||
continue;
|
||||
}
|
||||
} else {
|
||||
if (tok[0] == '*') tok = ALL;
|
||||
struct vector *vec;
|
||||
switch (state) {
|
||||
case 0:
|
||||
vec = &source;
|
||||
break;
|
||||
case 1:
|
||||
vec = ⌖
|
||||
break;
|
||||
case 2:
|
||||
vec = NULL;
|
||||
class = tok;
|
||||
break;
|
||||
case 3:
|
||||
vec = &permission;
|
||||
break;
|
||||
default:
|
||||
return 1;
|
||||
}
|
||||
vec_push_back(vec, tok);
|
||||
}
|
||||
if (!in_bracket) ++state;
|
||||
tok = strtok_r(NULL, " ", &saveptr);
|
||||
}
|
||||
if (state != 4) return 1;
|
||||
for(int i = 0; i < source.size; ++i)
|
||||
for (int j = 0; j < target.size; ++j)
|
||||
for (int k = 0; k < permission.size; ++k) {
|
||||
int (*action_func)(char*, char*, char*, char*);
|
||||
char *action_str;
|
||||
switch (action) {
|
||||
case 0:
|
||||
action_func = sepol_allow;
|
||||
action_str = "allow";
|
||||
break;
|
||||
case 1:
|
||||
action_func = sepol_deny;
|
||||
action_str = "deny";
|
||||
break;
|
||||
case 2:
|
||||
action_func = sepol_auditallow;
|
||||
action_str = "auditallow";
|
||||
break;
|
||||
case 3:
|
||||
action_func = sepol_auditdeny;
|
||||
action_str = "auditdeny";
|
||||
break;
|
||||
default:
|
||||
return 1;
|
||||
}
|
||||
if (action_func(source.data[i], target.data[j], class, permission.data[k]))
|
||||
fprintf(stderr, "Error in: %s %s %s %s %s\n",
|
||||
action_str, (char *) source.data[i], (char *) target.data[j], class, (char *) permission.data[k]);
|
||||
}
|
||||
vec_destroy(&source);
|
||||
vec_destroy(&target);
|
||||
vec_destroy(&permission);
|
||||
return 0;
|
||||
}
|
||||
|
||||
// Pattern 2: action { class } { attribute }
|
||||
static int parse_pattern_2(int action, char* statement) {
|
||||
int state = 0, in_bracket = 0;
|
||||
char *tok, *saveptr;
|
||||
struct vector class, attribute;
|
||||
vec_init(&class);
|
||||
vec_init(&attribute);
|
||||
tok = strtok_r(statement, " ", &saveptr);
|
||||
while (tok != NULL) {
|
||||
if (tok[0] == '{') {
|
||||
if (in_bracket) return 1;
|
||||
in_bracket = 1;
|
||||
if (tok[1]) {
|
||||
++tok;
|
||||
continue;
|
||||
}
|
||||
} else if (tok[strlen(tok) - 1] == '}') {
|
||||
if (!in_bracket) return 1;
|
||||
in_bracket = 0;
|
||||
if (strlen(tok) - 1) {
|
||||
tok[strlen(tok) - 1] = '\0';
|
||||
continue;
|
||||
}
|
||||
} else {
|
||||
if (tok[0] == '*') tok = ALL;
|
||||
struct vector *vec;
|
||||
switch (state) {
|
||||
case 0:
|
||||
vec = &class;
|
||||
break;
|
||||
case 1:
|
||||
vec = &attribute;
|
||||
break;
|
||||
default:
|
||||
return 1;
|
||||
}
|
||||
vec_push_back(vec, tok);
|
||||
}
|
||||
if (!in_bracket) ++state;
|
||||
tok = strtok_r(NULL, " ", &saveptr);
|
||||
}
|
||||
if (state != 2) return 1;
|
||||
for(int i = 0; i < class.size; ++i)
|
||||
for (int j = 0; j < attribute.size; ++j) {
|
||||
int (*action_func)(char*, char*);
|
||||
char *action_str;
|
||||
switch (action) {
|
||||
case 0:
|
||||
action_func = sepol_attradd;
|
||||
action_str = "attradd";
|
||||
break;
|
||||
default:
|
||||
return 1;
|
||||
}
|
||||
if (action_func(class.data[i], attribute.data[j]))
|
||||
fprintf(stderr, "Error in: %s %s %s\n",
|
||||
action_str, (char *) class.data[i], (char *) attribute.data[j]);
|
||||
}
|
||||
vec_destroy(&class);
|
||||
vec_destroy(&attribute);
|
||||
return 0;
|
||||
}
|
||||
|
||||
// Pattern 3: action { type }
|
||||
static int parse_pattern_3(int action, char* statement) {
|
||||
char *tok, *saveptr;
|
||||
struct vector classes;
|
||||
vec_init(&classes);
|
||||
tok = strtok_r(statement, " {}", &saveptr);
|
||||
while (tok != NULL) {
|
||||
if (tok[0] == '*') tok = ALL;
|
||||
vec_push_back(&classes, tok);
|
||||
tok = strtok_r(NULL, " {}", &saveptr);
|
||||
}
|
||||
for (int i = 0; i < classes.size; ++i) {
|
||||
int (*action_func)(char*);
|
||||
char *action_str;
|
||||
switch (action) {
|
||||
case 0:
|
||||
action_func = sepol_create;
|
||||
action_str = "create";
|
||||
break;
|
||||
case 1:
|
||||
action_func = sepol_permissive;
|
||||
action_str = "permissive";
|
||||
break;
|
||||
case 2:
|
||||
action_func = sepol_enforce;
|
||||
action_str = "enforce";
|
||||
break;
|
||||
}
|
||||
if (action_func(classes.data[i]))
|
||||
fprintf(stderr, "Error in: %s %s\n", action_str, (char *) classes.data[i]);
|
||||
}
|
||||
vec_destroy(&classes);
|
||||
return 0;
|
||||
}
|
||||
|
||||
// Pattern 4: action source target class default (filename)
|
||||
static int parse_pattern_4(int action, char* statement) {
|
||||
int state = 0;
|
||||
char *tok, *saveptr;
|
||||
char *source, *target, *class, *def, *filename = NULL;
|
||||
tok = strtok_r(statement, " ", &saveptr);
|
||||
while (tok != NULL) {
|
||||
switch(state) {
|
||||
case 0:
|
||||
source = tok;
|
||||
break;
|
||||
case 1:
|
||||
target = tok;
|
||||
break;
|
||||
case 2:
|
||||
class = tok;
|
||||
break;
|
||||
case 3:
|
||||
def = tok;
|
||||
break;
|
||||
case 4:
|
||||
filename = tok;
|
||||
break;
|
||||
default:
|
||||
return 1;
|
||||
}
|
||||
tok = strtok_r(NULL, " ", &saveptr);
|
||||
++state;
|
||||
}
|
||||
if (state < 4) return 1;
|
||||
if (sepol_typetrans(source, target, class, def, filename))
|
||||
fprintf(stderr, "Error in: typetrans %s %s %s %s %s\n", source, target, class, def, filename ? filename : "");
|
||||
return 0;
|
||||
}
|
||||
|
||||
// Pattern 5: action { source } { target } { class } ioctl range
|
||||
static int parse_pattern_5(int action, char* statement) {
|
||||
int state = 0, in_bracket = 0;
|
||||
char *tok, *range, *saveptr;
|
||||
struct vector source, target, class;
|
||||
vec_init(&source);
|
||||
vec_init(&target);
|
||||
vec_init(&class);
|
||||
tok = strtok_r(statement, " ", &saveptr);
|
||||
while (tok != NULL) {
|
||||
if (tok[0] == '{') {
|
||||
if (in_bracket || state == 3 || state == 4) return 1;
|
||||
in_bracket = 1;
|
||||
if (tok[1]) {
|
||||
++tok;
|
||||
continue;
|
||||
}
|
||||
} else if (tok[strlen(tok) - 1] == '}') {
|
||||
if (!in_bracket || state == 3 || state == 4) return 1;
|
||||
in_bracket = 0;
|
||||
if (strlen(tok) - 1) {
|
||||
tok[strlen(tok) - 1] = '\0';
|
||||
continue;
|
||||
}
|
||||
} else {
|
||||
if (tok[0] == '*') tok = ALL;
|
||||
struct vector *vec;
|
||||
switch (state) {
|
||||
case 0:
|
||||
vec = &source;
|
||||
break;
|
||||
case 1:
|
||||
vec = ⌖
|
||||
break;
|
||||
case 2:
|
||||
vec = &class;
|
||||
break;
|
||||
case 3:
|
||||
// Should always be ioctl
|
||||
vec = NULL;
|
||||
break;
|
||||
case 4:
|
||||
vec = NULL;
|
||||
range = tok;
|
||||
break;
|
||||
default:
|
||||
return 1;
|
||||
}
|
||||
vec_push_back(vec, tok);
|
||||
}
|
||||
if (!in_bracket) ++state;
|
||||
tok = strtok_r(NULL, " ", &saveptr);
|
||||
}
|
||||
if (state != 5) return 1;
|
||||
for(int i = 0; i < source.size; ++i)
|
||||
for (int j = 0; j < target.size; ++j)
|
||||
for (int k = 0; k < class.size; ++k) {
|
||||
int (*action_func)(char*, char*, char*, char*);
|
||||
char *action_str;
|
||||
switch (action) {
|
||||
case 0:
|
||||
action_func = sepol_allowxperm;
|
||||
action_str = "allowxperm";
|
||||
break;
|
||||
case 1:
|
||||
action_func = sepol_auditallowxperm;
|
||||
action_str = "auditallowxperm";
|
||||
break;
|
||||
case 2:
|
||||
action_func = sepol_dontauditxperm;
|
||||
action_str = "dontauditxperm";
|
||||
break;
|
||||
default:
|
||||
return 1;
|
||||
}
|
||||
if (action_func(source.data[i], target.data[j], class.data[k], range))
|
||||
fprintf(stderr, "Error in: %s %s %s %s %s\n",
|
||||
action_str, (char *) source.data[i], (char *) target.data[j], (char *) class.data[k], range);
|
||||
}
|
||||
vec_destroy(&source);
|
||||
vec_destroy(&target);
|
||||
vec_destroy(&class);
|
||||
return 0;
|
||||
}
|
||||
|
||||
static void syntax_error_msg() {
|
||||
fprintf(stderr, "Syntax error in \"%s\"\n", err_msg);
|
||||
syntax_err = 1;
|
||||
}
|
||||
|
||||
int magiskpolicy_main(int argc, char *argv[]) {
|
||||
char *infile = NULL, *outfile = NULL, *tok, *saveptr;
|
||||
int live = 0, magisk = 0;
|
||||
struct vector rules;
|
||||
|
||||
vec_init(&rules);
|
||||
|
||||
if (argc < 2) usage(argv[0]);
|
||||
for (int i = 1; i < argc; ++i) {
|
||||
if (argv[i][0] == '-' && argv[i][1] == '-') {
|
||||
if (strcmp(argv[i], "--live") == 0)
|
||||
live = 1;
|
||||
else if (strcmp(argv[i], "--magisk") == 0)
|
||||
magisk = 1;
|
||||
else if (strcmp(argv[i], "--load") == 0) {
|
||||
if (i + 1 >= argc) usage(argv[0]);
|
||||
infile = argv[i + 1];
|
||||
i += 1;
|
||||
} else if (strcmp(argv[i], "--save") == 0) {
|
||||
if (i + 1 >= argc) usage(argv[0]);
|
||||
outfile = argv[i + 1];
|
||||
i += 1;
|
||||
} else
|
||||
usage(argv[0]);
|
||||
} else {
|
||||
vec_push_back(&rules, argv[i]);
|
||||
}
|
||||
}
|
||||
|
||||
// Use current policy if not specified
|
||||
if(!infile)
|
||||
infile = SELINUX_POLICY;
|
||||
|
||||
if (load_policydb(infile)) {
|
||||
fprintf(stderr, "Cannot load policy from %s\n", infile);
|
||||
return 1;
|
||||
}
|
||||
|
||||
if (magisk)
|
||||
sepol_magisk_rules();
|
||||
|
||||
for (int i = 0; i < rules.size; ++i) {
|
||||
// Since strtok will modify the origin string, copy the policy for error messages
|
||||
strcpy(err_msg, rules.data[i]);
|
||||
tok = strtok_r(rules.data[i], " ", &saveptr);
|
||||
if (strcmp(tok, "allow") == 0) {
|
||||
if (parse_pattern_1(0, rules.data[i] + strlen(tok) + 1))
|
||||
syntax_error_msg();
|
||||
} else if (strcmp(tok, "deny") == 0) {
|
||||
if (parse_pattern_1(1, rules.data[i] + strlen(tok) + 1))
|
||||
syntax_error_msg();
|
||||
} else if (strcmp(tok, "auditallow") == 0) {
|
||||
if (parse_pattern_1(2, rules.data[i] + strlen(tok) + 1))
|
||||
syntax_error_msg();
|
||||
} else if (strcmp(tok, "auditdeny") == 0) {
|
||||
if (parse_pattern_1(3, rules.data[i] + strlen(tok) + 1))
|
||||
syntax_error_msg();
|
||||
} else if (strcmp(tok, "attradd") == 0) {
|
||||
if (parse_pattern_2(0, rules.data[i] + strlen(tok) + 1))
|
||||
syntax_error_msg();
|
||||
} else if (strcmp(tok, "create") == 0) {
|
||||
if (parse_pattern_3(0, rules.data[i] + strlen(tok) + 1))
|
||||
syntax_error_msg();
|
||||
} else if (strcmp(tok, "permissive") == 0) {
|
||||
if (parse_pattern_3(1, rules.data[i] + strlen(tok) + 1))
|
||||
syntax_error_msg();
|
||||
} else if (strcmp(tok, "enforce") == 0) {
|
||||
if (parse_pattern_3(2, rules.data[i] + strlen(tok) + 1))
|
||||
syntax_error_msg();
|
||||
} else if (strcmp(tok, "typetrans") == 0) {
|
||||
if (parse_pattern_4(0, rules.data[i] + strlen(tok) + 1))
|
||||
syntax_error_msg();
|
||||
} else if (strcmp(tok, "allowxperm") == 0) {
|
||||
if (parse_pattern_5(0, rules.data[i] + strlen(tok) + 1))
|
||||
syntax_error_msg();
|
||||
} else if (strcmp(tok, "auditallowxperm") == 0) {
|
||||
if (parse_pattern_5(1, rules.data[i] + strlen(tok) + 1))
|
||||
syntax_error_msg();
|
||||
} else if (strcmp(tok, "dontauditxperm") == 0) {
|
||||
if (parse_pattern_5(2, rules.data[i] + strlen(tok) + 1))
|
||||
syntax_error_msg();
|
||||
} else {
|
||||
syntax_error_msg();
|
||||
}
|
||||
}
|
||||
|
||||
if (syntax_err)
|
||||
statements();
|
||||
|
||||
vec_destroy(&rules);
|
||||
|
||||
if (live)
|
||||
outfile = SELINUX_LOAD;
|
||||
|
||||
if (outfile && dump_policydb(outfile)) {
|
||||
fprintf(stderr, "Cannot dump policy to %s\n", outfile);
|
||||
return 1;
|
||||
}
|
||||
|
||||
destroy_policydb();
|
||||
return 0;
|
||||
}
|
||||
36
native/jni/magiskpolicy/magiskpolicy.h
Normal file
36
native/jni/magiskpolicy/magiskpolicy.h
Normal file
@ -0,0 +1,36 @@
|
||||
/* 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
|
||||
163
native/jni/magiskpolicy/rules.c
Normal file
163
native/jni/magiskpolicy/rules.c
Normal file
@ -0,0 +1,163 @@
|
||||
#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");
|
||||
}
|
||||
572
native/jni/magiskpolicy/sepolicy.c
Normal file
572
native/jni/magiskpolicy/sepolicy.c
Normal file
@ -0,0 +1,572 @@
|
||||
#include "magiskpolicy.h"
|
||||
#include "sepolicy.h"
|
||||
|
||||
policydb_t *policydb = NULL;
|
||||
|
||||
static void *cmalloc(size_t s) {
|
||||
void *t = calloc(s, 1);
|
||||
if (t == NULL) {
|
||||
fprintf(stderr, "Out of memory\n");
|
||||
exit(1);
|
||||
}
|
||||
return t;
|
||||
}
|
||||
|
||||
static int get_attr(char *type, int value) {
|
||||
type_datum_t *attr = hashtab_search(policydb->p_types.table, type);
|
||||
if (!attr)
|
||||
return 1;
|
||||
|
||||
if (attr->flavor != TYPE_ATTRIB)
|
||||
return 1;
|
||||
|
||||
return !! ebitmap_get_bit(&policydb->attr_type_map[attr->s.value-1], value-1);
|
||||
}
|
||||
|
||||
static int get_attr_id(char *type) {
|
||||
type_datum_t *attr = hashtab_search(policydb->p_types.table, type);
|
||||
if (!attr)
|
||||
return 1;
|
||||
|
||||
if (attr->flavor != TYPE_ATTRIB)
|
||||
return 1;
|
||||
|
||||
return attr->s.value;
|
||||
}
|
||||
|
||||
static int set_attr(char *type, int value) {
|
||||
type_datum_t *attr = hashtab_search(policydb->p_types.table, type);
|
||||
if (!attr)
|
||||
return 1;
|
||||
|
||||
if (attr->flavor != TYPE_ATTRIB)
|
||||
return 1;
|
||||
|
||||
if(ebitmap_set_bit(&policydb->type_attr_map[value-1], attr->s.value-1, 1))
|
||||
return 1;
|
||||
if(ebitmap_set_bit(&policydb->attr_type_map[attr->s.value-1], value-1, 1))
|
||||
return 1;
|
||||
|
||||
return 0;
|
||||
}
|
||||
|
||||
static int __add_rule(int s, int t, int c, int p, int effect, int not) {
|
||||
avtab_key_t key;
|
||||
avtab_datum_t *av;
|
||||
int new_rule = 0;
|
||||
|
||||
key.source_type = s;
|
||||
key.target_type = t;
|
||||
key.target_class = c;
|
||||
key.specified = effect;
|
||||
|
||||
av = avtab_search(&policydb->te_avtab, &key);
|
||||
if (av == NULL) {
|
||||
av = cmalloc(sizeof(*av));
|
||||
new_rule = 1;
|
||||
}
|
||||
|
||||
if(not) {
|
||||
if (p < 0)
|
||||
av->data = 0U;
|
||||
else
|
||||
av->data &= ~(1U << (p - 1));
|
||||
} else {
|
||||
if (p < 0)
|
||||
av->data = ~0U;
|
||||
else
|
||||
av->data |= 1U << (p - 1);
|
||||
}
|
||||
|
||||
if (new_rule) {
|
||||
if (avtab_insert(&policydb->te_avtab, &key, av)) {
|
||||
fprintf(stderr, "Error inserting into avtab\n");
|
||||
return 1;
|
||||
}
|
||||
free(av);
|
||||
}
|
||||
|
||||
return 0;
|
||||
}
|
||||
|
||||
static int add_rule_auto(type_datum_t *src, type_datum_t *tgt, class_datum_t *cls, perm_datum_t *perm, int effect, int not) {
|
||||
hashtab_ptr_t cur;
|
||||
int ret = 0;
|
||||
|
||||
if (src == NULL) {
|
||||
hashtab_for_each(policydb->p_types.table, &cur) {
|
||||
src = cur->datum;
|
||||
ret |= add_rule_auto(src, tgt, cls, perm, effect, not);
|
||||
}
|
||||
} else if (tgt == NULL) {
|
||||
hashtab_for_each(policydb->p_types.table, &cur) {
|
||||
tgt = cur->datum;
|
||||
ret |= add_rule_auto(src, tgt, cls, perm, effect, not);
|
||||
}
|
||||
} else if (cls == NULL) {
|
||||
hashtab_for_each(policydb->p_classes.table, &cur) {
|
||||
cls = cur->datum;
|
||||
ret |= __add_rule(src->s.value, tgt->s.value, cls->s.value, -1, effect, not);
|
||||
}
|
||||
} else {
|
||||
return __add_rule(src->s.value, tgt->s.value, cls->s.value, perm ? perm->s.value : -1, effect, not);
|
||||
}
|
||||
return ret;
|
||||
}
|
||||
|
||||
#define ioctl_driver(x) (x>>8 & 0xFF)
|
||||
#define ioctl_func(x) (x & 0xFF)
|
||||
|
||||
static int __add_xperm_rule(int s, int t, int c, uint16_t low, uint16_t high, int effect, int not) {
|
||||
avtab_key_t key;
|
||||
avtab_datum_t *av;
|
||||
int new_rule = 0;
|
||||
|
||||
key.source_type = s;
|
||||
key.target_type = t;
|
||||
key.target_class = c;
|
||||
key.specified = effect;
|
||||
|
||||
av = avtab_search(&policydb->te_avtab, &key);
|
||||
if (av == NULL) {
|
||||
av = cmalloc(sizeof(*av));
|
||||
av->xperms = cmalloc(sizeof(avtab_extended_perms_t));
|
||||
new_rule = 1;
|
||||
if (ioctl_driver(low) != ioctl_driver(high)) {
|
||||
av->xperms->specified = AVTAB_XPERMS_IOCTLDRIVER;
|
||||
av->xperms->driver = 0;
|
||||
} else {
|
||||
av->xperms->specified = AVTAB_XPERMS_IOCTLFUNCTION;
|
||||
av->xperms->driver = ioctl_driver(low);
|
||||
}
|
||||
}
|
||||
|
||||
if (av->xperms->specified == AVTAB_XPERMS_IOCTLDRIVER) {
|
||||
for (unsigned i = ioctl_driver(low); i <= ioctl_driver(high); ++i) {
|
||||
if (not)
|
||||
xperm_clear(i, av->xperms->perms);
|
||||
else
|
||||
xperm_set(i, av->xperms->perms);
|
||||
}
|
||||
} else {
|
||||
for (unsigned i = ioctl_func(low); i <= ioctl_func(high); ++i) {
|
||||
if (not)
|
||||
xperm_clear(i, av->xperms->perms);
|
||||
else
|
||||
xperm_set(i, av->xperms->perms);
|
||||
}
|
||||
}
|
||||
|
||||
if (new_rule) {
|
||||
if (avtab_insert(&policydb->te_avtab, &key, av)) {
|
||||
fprintf(stderr, "Error inserting into avtab\n");
|
||||
return 1;
|
||||
}
|
||||
free(av);
|
||||
}
|
||||
|
||||
return 0;
|
||||
}
|
||||
|
||||
static int add_xperm_rule_auto(type_datum_t *src, type_datum_t *tgt, class_datum_t *cls,
|
||||
uint16_t low, uint16_t high, int effect, int not) {
|
||||
hashtab_ptr_t cur;
|
||||
int ret = 0;
|
||||
|
||||
if (src == NULL) {
|
||||
hashtab_for_each(policydb->p_types.table, &cur) {
|
||||
src = cur->datum;
|
||||
ret |= add_xperm_rule_auto(src, tgt, cls, low, high, effect, not);
|
||||
}
|
||||
} else if (tgt == NULL) {
|
||||
hashtab_for_each(policydb->p_types.table, &cur) {
|
||||
tgt = cur->datum;
|
||||
ret |= add_xperm_rule_auto(src, tgt, cls, low, high, effect, not);
|
||||
}
|
||||
} else if (cls == NULL) {
|
||||
hashtab_for_each(policydb->p_classes.table, &cur) {
|
||||
cls = cur->datum;
|
||||
ret |= __add_xperm_rule(src->s.value, tgt->s.value, cls->s.value, low, high, effect, not);
|
||||
}
|
||||
} else {
|
||||
return __add_xperm_rule(src->s.value, tgt->s.value, cls->s.value, low, high, effect, not);
|
||||
}
|
||||
return ret;
|
||||
}
|
||||
|
||||
int load_policydb(const char *filename) {
|
||||
int fd;
|
||||
struct stat sb;
|
||||
struct policy_file pf;
|
||||
void *map;
|
||||
int ret;
|
||||
|
||||
if (policydb)
|
||||
destroy_policydb();
|
||||
|
||||
policydb = cmalloc(sizeof(*policydb));
|
||||
|
||||
fd = open(filename, O_RDONLY);
|
||||
if (fd < 0) {
|
||||
fprintf(stderr, "Can't open '%s': %s\n",
|
||||
filename, strerror(errno));
|
||||
return 1;
|
||||
}
|
||||
if (fstat(fd, &sb) < 0) {
|
||||
fprintf(stderr, "Can't stat '%s': %s\n",
|
||||
filename, strerror(errno));
|
||||
return 1;
|
||||
}
|
||||
map = mmap(NULL, sb.st_size, PROT_READ | PROT_WRITE, MAP_PRIVATE,
|
||||
fd, 0);
|
||||
if (map == MAP_FAILED) {
|
||||
fprintf(stderr, "Can't mmap '%s': %s\n",
|
||||
filename, strerror(errno));
|
||||
return 1;
|
||||
}
|
||||
|
||||
policy_file_init(&pf);
|
||||
pf.type = PF_USE_MEMORY;
|
||||
pf.data = map;
|
||||
pf.len = sb.st_size;
|
||||
if (policydb_init(policydb)) {
|
||||
fprintf(stderr, "policydb_init: Out of memory!\n");
|
||||
return 1;
|
||||
}
|
||||
ret = policydb_read(policydb, &pf, 0);
|
||||
if (ret) {
|
||||
fprintf(stderr, "error(s) encountered while parsing configuration\n");
|
||||
return 1;
|
||||
}
|
||||
|
||||
munmap(map, sb.st_size);
|
||||
close(fd);
|
||||
|
||||
return 0;
|
||||
}
|
||||
|
||||
int dump_policydb(const char *filename) {
|
||||
int fd, ret;
|
||||
void *data = NULL;
|
||||
size_t len;
|
||||
policydb_to_image(NULL, policydb, &data, &len);
|
||||
if (data == NULL) {
|
||||
fprintf(stderr, "Fail to dump policy image!");
|
||||
return 1;
|
||||
}
|
||||
|
||||
fd = creat(filename, 0644);
|
||||
if (fd < 0) {
|
||||
fprintf(stderr, "Can't open '%s': %s\n",
|
||||
filename, strerror(errno));
|
||||
return 1;
|
||||
}
|
||||
ret = write(fd, data, len);
|
||||
close(fd);
|
||||
if (ret < 0) {
|
||||
fprintf(stderr, "Could not write policy to %s\n",
|
||||
filename);
|
||||
return 1;
|
||||
}
|
||||
return 0;
|
||||
}
|
||||
|
||||
void destroy_policydb() {
|
||||
policydb_destroy(policydb);
|
||||
free(policydb);
|
||||
policydb = NULL;
|
||||
}
|
||||
|
||||
int create_domain(char *d) {
|
||||
symtab_datum_t *src = hashtab_search(policydb->p_types.table, d);
|
||||
if(src) {
|
||||
fprintf(stderr, "Domain %s already exists\n", d);
|
||||
return 0;
|
||||
}
|
||||
|
||||
type_datum_t *typedatum = (type_datum_t *) malloc(sizeof(type_datum_t));
|
||||
type_datum_init(typedatum);
|
||||
typedatum->primary = 1;
|
||||
typedatum->flavor = TYPE_TYPE;
|
||||
|
||||
uint32_t value = 0;
|
||||
symtab_insert(policydb, SYM_TYPES, strdup(d), typedatum, SCOPE_DECL, 1, &value);
|
||||
typedatum->s.value = value;
|
||||
|
||||
if (ebitmap_set_bit(&policydb->global->branch_list->declared.scope[SYM_TYPES], value - 1, 1)) {
|
||||
return 1;
|
||||
}
|
||||
|
||||
policydb->type_attr_map = realloc(policydb->type_attr_map, sizeof(ebitmap_t) * policydb->p_types.nprim);
|
||||
policydb->attr_type_map = realloc(policydb->attr_type_map, sizeof(ebitmap_t) * policydb->p_types.nprim);
|
||||
ebitmap_init(&policydb->type_attr_map[value-1]);
|
||||
ebitmap_init(&policydb->attr_type_map[value-1]);
|
||||
ebitmap_set_bit(&policydb->type_attr_map[value-1], value-1, 1);
|
||||
|
||||
src = hashtab_search(policydb->p_types.table, d);
|
||||
if(!src)
|
||||
return 1;
|
||||
|
||||
if(policydb_index_decls(NULL, policydb))
|
||||
return 1;
|
||||
|
||||
if(policydb_index_classes(policydb))
|
||||
return 1;
|
||||
|
||||
if(policydb_index_others(NULL, policydb, 0))
|
||||
return 1;
|
||||
|
||||
//Add the domain to all roles
|
||||
for(unsigned i=0; i<policydb->p_roles.nprim; ++i) {
|
||||
//Not sure all those three calls are needed
|
||||
ebitmap_set_bit(&policydb->role_val_to_struct[i]->types.negset, value-1, 0);
|
||||
ebitmap_set_bit(&policydb->role_val_to_struct[i]->types.types, value-1, 1);
|
||||
type_set_expand(&policydb->role_val_to_struct[i]->types, &policydb->role_val_to_struct[i]->cache, policydb, 0);
|
||||
}
|
||||
|
||||
return set_attr("domain", value);
|
||||
}
|
||||
|
||||
int set_domain_state(char* s, int state) {
|
||||
type_datum_t *type;
|
||||
hashtab_ptr_t cur;
|
||||
if (s == NULL) {
|
||||
hashtab_for_each(policydb->p_types.table, &cur) {
|
||||
type = cur->datum;
|
||||
if (ebitmap_set_bit(&policydb->permissive_map, type->s.value, state)) {
|
||||
fprintf(stderr, "Could not set bit in permissive map\n");
|
||||
return 1;
|
||||
}
|
||||
}
|
||||
} else {
|
||||
type = hashtab_search(policydb->p_types.table, s);
|
||||
if (type == NULL) {
|
||||
fprintf(stderr, "type %s does not exist\n", s);
|
||||
return 1;
|
||||
}
|
||||
if (ebitmap_set_bit(&policydb->permissive_map, type->s.value, state)) {
|
||||
fprintf(stderr, "Could not set bit in permissive map\n");
|
||||
return 1;
|
||||
}
|
||||
}
|
||||
|
||||
return 0;
|
||||
}
|
||||
|
||||
int add_transition(char *s, char *t, char *c, char *d) {
|
||||
type_datum_t *src, *tgt, *def;
|
||||
class_datum_t *cls;
|
||||
|
||||
avtab_key_t key;
|
||||
avtab_datum_t *av;
|
||||
int new_rule = 0;
|
||||
|
||||
src = hashtab_search(policydb->p_types.table, s);
|
||||
if (src == NULL) {
|
||||
fprintf(stderr, "source type %s does not exist\n", s);
|
||||
return 1;
|
||||
}
|
||||
tgt = hashtab_search(policydb->p_types.table, t);
|
||||
if (tgt == NULL) {
|
||||
fprintf(stderr, "target type %s does not exist\n", t);
|
||||
return 1;
|
||||
}
|
||||
cls = hashtab_search(policydb->p_classes.table, c);
|
||||
if (cls == NULL) {
|
||||
fprintf(stderr, "class %s does not exist\n", c);
|
||||
return 1;
|
||||
}
|
||||
def = hashtab_search(policydb->p_types.table, d);
|
||||
if (def == NULL) {
|
||||
fprintf(stderr, "default type %s does not exist\n", d);
|
||||
return 1;
|
||||
}
|
||||
|
||||
key.source_type = src->s.value;
|
||||
key.target_type = tgt->s.value;
|
||||
key.target_class = cls->s.value;
|
||||
key.specified = AVTAB_TRANSITION;
|
||||
av = avtab_search(&policydb->te_avtab, &key);
|
||||
if (av == NULL) {
|
||||
av = cmalloc(sizeof(*av));
|
||||
new_rule = 1;
|
||||
}
|
||||
|
||||
av->data = def->s.value;
|
||||
|
||||
if (new_rule) {
|
||||
if (avtab_insert(&policydb->te_avtab, &key, av)) {
|
||||
fprintf(stderr, "Error inserting into avtab\n");
|
||||
return 1;
|
||||
}
|
||||
free(av);
|
||||
}
|
||||
return 0;
|
||||
}
|
||||
|
||||
int add_file_transition(char *s, char *t, char *c, char *d, char* filename) {
|
||||
type_datum_t *src, *tgt, *def;
|
||||
class_datum_t *cls;
|
||||
|
||||
src = hashtab_search(policydb->p_types.table, s);
|
||||
if (src == NULL) {
|
||||
fprintf(stderr, "source type %s does not exist\n", s);
|
||||
return 1;
|
||||
}
|
||||
tgt = hashtab_search(policydb->p_types.table, t);
|
||||
if (tgt == NULL) {
|
||||
fprintf(stderr, "target type %s does not exist\n", t);
|
||||
return 1;
|
||||
}
|
||||
cls = hashtab_search(policydb->p_classes.table, c);
|
||||
if (cls == NULL) {
|
||||
fprintf(stderr, "class %s does not exist\n", c);
|
||||
return 1;
|
||||
}
|
||||
def = hashtab_search(policydb->p_types.table, d);
|
||||
if (def == NULL) {
|
||||
fprintf(stderr, "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 = filename;
|
||||
|
||||
filename_trans_datum_t *trans_datum;
|
||||
trans_datum = hashtab_search(policydb->p_types.table, (hashtab_key_t) &trans_key);
|
||||
|
||||
if (trans_datum == NULL) {
|
||||
trans_datum = cmalloc(sizeof(*trans_datum));
|
||||
hashtab_insert(policydb->filename_trans, (hashtab_key_t) &trans_key, trans_datum);
|
||||
}
|
||||
|
||||
// Overwrite existing
|
||||
trans_datum->otype = def->s.value;
|
||||
return 0;
|
||||
}
|
||||
|
||||
int add_typeattribute(char *domainS, char *attr) {
|
||||
type_datum_t *domain;
|
||||
|
||||
domain = hashtab_search(policydb->p_types.table, domainS);
|
||||
if (domain == NULL) {
|
||||
fprintf(stderr, "source type %s does not exist\n", domainS);
|
||||
return 1;
|
||||
}
|
||||
|
||||
set_attr(attr, domain->s.value);
|
||||
|
||||
int typeId = get_attr_id(attr);
|
||||
//Now let's update all constraints!
|
||||
//(kernel doesn't support (yet?) type_names rules)
|
||||
for(int i=0; i<policydb->p_classes.nprim; ++i) {
|
||||
class_datum_t *cl = policydb->class_val_to_struct[i];
|
||||
for(constraint_node_t *n = cl->constraints; n ; n=n->next) {
|
||||
for(constraint_expr_t *e = n->expr; e; e=e->next) {
|
||||
if(e->expr_type == CEXPR_NAMES) {
|
||||
if(ebitmap_get_bit(&e->type_names->types, typeId-1)) {
|
||||
ebitmap_set_bit(&e->names, domain->s.value-1, 1);
|
||||
}
|
||||
}
|
||||
}
|
||||
}
|
||||
}
|
||||
return 0;
|
||||
}
|
||||
|
||||
int add_rule(char *s, char *t, char *c, char *p, int effect, int not) {
|
||||
type_datum_t *src = NULL, *tgt = NULL;
|
||||
class_datum_t *cls = NULL;
|
||||
perm_datum_t *perm = NULL;
|
||||
|
||||
if (s) {
|
||||
src = hashtab_search(policydb->p_types.table, s);
|
||||
if (src == NULL) {
|
||||
fprintf(stderr, "source type %s does not exist\n", s);
|
||||
return 1;
|
||||
}
|
||||
}
|
||||
|
||||
if (t) {
|
||||
tgt = hashtab_search(policydb->p_types.table, t);
|
||||
if (tgt == NULL) {
|
||||
fprintf(stderr, "target type %s does not exist\n", t);
|
||||
return 1;
|
||||
}
|
||||
}
|
||||
|
||||
if (c) {
|
||||
cls = hashtab_search(policydb->p_classes.table, c);
|
||||
if (cls == NULL) {
|
||||
fprintf(stderr, "class %s does not exist\n", c);
|
||||
return 1;
|
||||
}
|
||||
}
|
||||
|
||||
if (p) {
|
||||
if (c == NULL) {
|
||||
fprintf(stderr, "No class is specified, cannot add perm [%s] \n", p);
|
||||
return 1;
|
||||
}
|
||||
|
||||
if (cls != NULL) {
|
||||
perm = hashtab_search(cls->permissions.table, p);
|
||||
if (perm == NULL && cls->comdatum != NULL) {
|
||||
perm = hashtab_search(cls->comdatum->permissions.table, p);
|
||||
}
|
||||
if (perm == NULL) {
|
||||
fprintf(stderr, "perm %s does not exist in class %s\n", p, c);
|
||||
return 1;
|
||||
}
|
||||
}
|
||||
}
|
||||
return add_rule_auto(src, tgt, cls, perm, effect, not);
|
||||
}
|
||||
|
||||
int add_xperm_rule(char *s, char *t, char *c, char *range, int effect, int not) {
|
||||
type_datum_t *src = NULL, *tgt = NULL;
|
||||
class_datum_t *cls = NULL;
|
||||
|
||||
if (s) {
|
||||
src = hashtab_search(policydb->p_types.table, s);
|
||||
if (src == NULL) {
|
||||
fprintf(stderr, "source type %s does not exist\n", s);
|
||||
return 1;
|
||||
}
|
||||
}
|
||||
|
||||
if (t) {
|
||||
tgt = hashtab_search(policydb->p_types.table, t);
|
||||
if (tgt == NULL) {
|
||||
fprintf(stderr, "target type %s does not exist\n", t);
|
||||
return 1;
|
||||
}
|
||||
}
|
||||
|
||||
if (c) {
|
||||
cls = hashtab_search(policydb->p_classes.table, c);
|
||||
if (cls == NULL) {
|
||||
fprintf(stderr, "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(src, tgt, cls, low, high, effect, not);
|
||||
}
|
||||
47
native/jni/magiskpolicy/sepolicy.h
Normal file
47
native/jni/magiskpolicy/sepolicy.h
Normal file
@ -0,0 +1,47 @@
|
||||
/* 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
|
||||
Loading…
x
Reference in New Issue
Block a user