forked from MarcoBuster/Magisk
Refacter add_rule to auto mode
This commit is contained in:
topjohnwu
parent
3f43567c8f
commit
60a7eaf2bb
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@ -166,42 +166,6 @@ int add_irule(int s, int t, int c, int p, int effect, int not, policydb_t* polic
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return 0;
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}
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int add_rule(char *s, char *t, char *c, char *p, int effect, int not, policydb_t *policy) {
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type_datum_t *src, *tgt;
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class_datum_t *cls;
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perm_datum_t *perm;
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src = hashtab_search(policy->p_types.table, s);
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if (src == NULL) {
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fprintf(stderr, "source type %s does not exist\n", s);
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return 1;
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}
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tgt = hashtab_search(policy->p_types.table, t);
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if (tgt == NULL) {
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fprintf(stderr, "target type %s does not exist\n", t);
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return 1;
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}
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cls = hashtab_search(policy->p_classes.table, c);
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if (cls == NULL) {
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fprintf(stderr, "class %s does not exist\n", c);
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return 1;
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}
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perm = hashtab_search(cls->permissions.table, p);
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if (perm == NULL) {
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if (cls->comdatum == NULL) {
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fprintf(stderr, "perm %s does not exist in class %s\n", p, c);
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return 1;
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}
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perm = hashtab_search(cls->comdatum->permissions.table, p);
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if (perm == NULL) {
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fprintf(stderr, "perm %s does not exist in class %s\n", p, c);
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return 1;
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}
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}
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return add_irule(src->s.value, tgt->s.value, cls->s.value, perm->s.value, effect, not, policy);
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}
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int add_typerule(char *s, char *targetAttribute, char **minusses, char *c, char *p, int effect, int not, policydb_t *policy) {
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type_datum_t *src, *tgt;
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class_datum_t *cls;
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@ -433,8 +397,7 @@ int load_policy(char *filename, policydb_t *policydb, struct policy_file *pf) {
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return 0;
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}
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int auto_allow(type_datum_t *src, type_datum_t *tgt, class_datum_t *cls, policydb_t *policy) {
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perm_datum_t *perm;
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int add_rule_auto(type_datum_t *src, type_datum_t *tgt, class_datum_t *cls, perm_datum_t *perm, int effect, int not, policydb_t *policy) {
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hashtab_t type_table, class_table, perm_table;
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hashtab_ptr_t cur;
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@ -446,7 +409,7 @@ int auto_allow(type_datum_t *src, type_datum_t *tgt, class_datum_t *cls, policyd
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cur = type_table->htable[i];
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while (cur != NULL) {
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src = cur->datum;
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if(auto_allow(src, tgt, cls, policy))
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if(add_rule_auto(src, tgt, cls, perm, effect, not, policy))
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return 1;
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cur = cur->next;
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}
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@ -456,7 +419,7 @@ int auto_allow(type_datum_t *src, type_datum_t *tgt, class_datum_t *cls, policyd
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cur = type_table->htable[i];
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while (cur != NULL) {
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tgt = cur->datum;
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if(auto_allow(src, tgt, cls, policy))
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if(add_rule_auto(src, tgt, cls, perm, effect, not, policy))
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return 1;
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cur = cur->next;
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}
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@ -466,18 +429,18 @@ int auto_allow(type_datum_t *src, type_datum_t *tgt, class_datum_t *cls, policyd
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cur = class_table->htable[i];
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while (cur != NULL) {
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cls = cur->datum;
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if(auto_allow(src, tgt, cls, policy))
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if(add_rule_auto(src, tgt, cls, perm, effect, not, policy))
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return 1;
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cur = cur->next;
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}
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}
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} else {
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} else if (perm == NULL) {
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perm_table = cls->permissions.table;
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for (int i = 0; i < perm_table->size; ++i) {
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cur = perm_table->htable[i];
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while (cur != NULL) {
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perm = cur->datum;
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if(add_irule(src->s.value, tgt->s.value, cls->s.value, perm->s.value, AVTAB_ALLOWED, 0, policy))
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if(add_irule(src->s.value, tgt->s.value, cls->s.value, perm->s.value, effect, not, policy))
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return 1;
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cur = cur->next;
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}
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@ -489,16 +452,67 @@ int auto_allow(type_datum_t *src, type_datum_t *tgt, class_datum_t *cls, policyd
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cur = perm_table->htable[i];
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while (cur != NULL) {
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perm = cur->datum;
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if(add_irule(src->s.value, tgt->s.value, cls->s.value, perm->s.value, AVTAB_ALLOWED, 0, policy))
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if(add_irule(src->s.value, tgt->s.value, cls->s.value, perm->s.value, effect, not, policy))
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return 1;
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cur = cur->next;
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}
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}
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}
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} else {
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return add_irule(src->s.value, tgt->s.value, cls->s.value, perm->s.value, effect, not, policy);
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}
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return 0;
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}
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int add_rule(char *s, char *t, char *c, char *p, int effect, int not, policydb_t *policy) {
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type_datum_t *src = NULL, *tgt = NULL;
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class_datum_t *cls = NULL;
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perm_datum_t *perm = NULL;
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if (s) {
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src = hashtab_search(policy->p_types.table, s);
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if (src == NULL) {
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fprintf(stderr, "source type %s does not exist\n", s);
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return 1;
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}
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}
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if (t) {
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tgt = hashtab_search(policy->p_types.table, t);
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if (tgt == NULL) {
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fprintf(stderr, "target type %s does not exist\n", t);
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return 1;
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}
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}
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if (c) {
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cls = hashtab_search(policy->p_classes.table, c);
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if (cls == NULL) {
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fprintf(stderr, "class %s does not exist\n", c);
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return 1;
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}
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}
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if (p) {
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if (c == NULL) {
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fprintf(stderr, "No class is specified, cannot add perm [%s] \n", p);
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return 1;
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}
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if (cls != NULL) {
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perm = hashtab_search(cls->permissions.table, p);
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if (perm == NULL && cls->comdatum != NULL) {
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perm = hashtab_search(cls->comdatum->permissions.table, p);
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}
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if (perm == NULL) {
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fprintf(stderr, "perm %s does not exist in class %s\n", p, c);
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return 1;
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}
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}
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}
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return add_rule_auto(src, tgt, cls, perm, effect, not, policy);
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}
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int live_patch(policydb_t *policydb) {
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char *filename = "/sys/fs/selinux/load";
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int fd, ret;
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@ -506,6 +520,7 @@ int live_patch(policydb_t *policydb) {
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size_t len;
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policydb_to_image(NULL, policydb, &data, &len);
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if (data == NULL) fprintf(stderr, "Error!");
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// based on libselinux security_load_policy()
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fd = open(filename, O_RDWR);
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@ -528,7 +543,7 @@ int main(int argc, char **argv)
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{
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char *policy = NULL, *source = NULL, *target = NULL, *class = NULL, *perm = NULL;
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char *fcon = NULL, *outfile = NULL, *permissive = NULL, *attr = NULL, *filetrans = NULL;
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int exists = 0, not = 0, autoAllow = 0, live = 0;
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int exists = 0, not = 0, live = 0, builtin = 0;
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policydb_t policydb;
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struct policy_file pf, outpf;
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sidtab_t sidtab;
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@ -546,12 +561,11 @@ int main(int argc, char **argv)
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{"fcon", required_argument, NULL, 'f'},
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{"filetransition", required_argument, NULL, 'g'},
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{"noaudit", no_argument, NULL, 'n'},
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{"policy", required_argument, NULL, 'P'},
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{"file", required_argument, NULL, 'P'},
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{"output", required_argument, NULL, 'o'},
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{"permissive", required_argument, NULL, 'Z'},
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{"not-permissive", required_argument, NULL, 'z'},
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{"not", no_argument, NULL, 0},
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{"auto", no_argument, NULL, 0},
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{"live", no_argument, NULL, 0},
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{NULL, 0, NULL, 0}
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};
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@ -562,8 +576,6 @@ int main(int argc, char **argv)
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case 0:
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if(strcmp(long_options[option_index].name, "not") == 0)
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not = 1;
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else if(strcmp(long_options[option_index].name, "auto") == 0)
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autoAllow = 1;
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else if(strcmp(long_options[option_index].name, "live") == 0)
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live = 1;
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else
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@ -615,12 +627,15 @@ int main(int argc, char **argv)
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}
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}
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if ((!source || !target || !class || !perm) && !permissive && !fcon && !attr &&!filetrans && !exists && !auto_allow )
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usage(argv[0]);
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// Use builtin rules if nothing specified
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if (!source && !target && !class && !perm && !permissive && !fcon && !attr &&!filetrans && !exists)
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builtin = 1;
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// Overwrite original if not specified
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if(!outfile)
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outfile = policy;
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// Use current policy if not specified
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if(!policy)
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policy = "/sys/fs/selinux/policy";
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@ -635,18 +650,11 @@ int main(int argc, char **argv)
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if (policydb_load_isids(&policydb, &sidtab))
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return 1;
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if (autoAllow) {
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type_datum_t *src = NULL, *tgt = NULL;
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class_datum_t *cls = NULL;
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if (source)
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src = hashtab_search(policydb.p_types.table, source);
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if (target)
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tgt = hashtab_search(policydb.p_types.table, target);
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if (class)
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cls = hashtab_search(policydb.p_classes.table, class);
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if (auto_allow(src, tgt, cls, &policydb))
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return 1;
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} else if (permissive) {
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if (builtin) {
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// TODO: Create builtin rules
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// builtin(&policydb);
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}
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else if (permissive) {
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type_datum_t *type;
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create_domain(permissive, &policydb);
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type = hashtab_search(policydb.p_types.table, permissive);
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@ -688,23 +696,26 @@ int main(int argc, char **argv)
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return 1;
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} else {
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//Add a rule to a whole set of typeattribute, not just a type
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if(*target == '=') {
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char *saveptr = NULL;
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if (target != NULL) {
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if(*target == '=') {
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char *saveptr = NULL;
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char *targetAttribute = strtok_r(target, "-", &saveptr);
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char *targetAttribute = strtok_r(target, "-", &saveptr);
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char *vals[64];
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int i = 0;
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char *vals[64];
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int i = 0;
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char *m = NULL;
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while( (m = strtok_r(NULL, "-", &saveptr)) != NULL) {
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vals[i++] = m;
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char *m = NULL;
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while( (m = strtok_r(NULL, "-", &saveptr)) != NULL) {
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vals[i++] = m;
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}
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vals[i] = NULL;
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if(add_typerule(source, targetAttribute+1, vals, class, perm, AVTAB_ALLOWED, not, &policydb))
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return 1;
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}
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vals[i] = NULL;
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if(add_typerule(source, targetAttribute+1, vals, class, perm, AVTAB_ALLOWED, not, &policydb))
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return 1;
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} else {
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}
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if (perm != NULL) {
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char *saveptr = NULL;
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char *p = strtok_r(perm, ",", &saveptr);
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@ -714,6 +725,11 @@ int main(int argc, char **argv)
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return 1;
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}
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} while( (p = strtok_r(NULL, ",", &saveptr)) != NULL);
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} else {
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if (add_rule(source, target, class, perm, AVTAB_ALLOWED, not, &policydb)) {
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fprintf(stderr, "Could not add rule\n");
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return 1;
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}
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}
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}
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