Refacter add_rule to auto mode

sepolicy-inject.c

@@ -166,42 +166,6 @@ int add_irule(int s, int t, int c, int p, int effect, int not, policydb_t* polic
 	return 0;
 }
 
-int add_rule(char *s, char *t, char *c, char *p, int effect, int not, policydb_t *policy) {
-	type_datum_t *src, *tgt;
-	class_datum_t *cls;
-	perm_datum_t *perm;
-
-	src = hashtab_search(policy->p_types.table, s);
-	if (src == NULL) {
-		fprintf(stderr, "source type %s does not exist\n", s);
-		return 1;
-	}
-	tgt = hashtab_search(policy->p_types.table, t);
-	if (tgt == NULL) {
-		fprintf(stderr, "target type %s does not exist\n", t);
-		return 1;
-	}
-	cls = hashtab_search(policy->p_classes.table, c);
-	if (cls == NULL) {
-		fprintf(stderr, "class %s does not exist\n", c);
-		return 1;
-	}
-	perm = hashtab_search(cls->permissions.table, p);
-	if (perm == NULL) {
-		if (cls->comdatum == NULL) {
-			fprintf(stderr, "perm %s does not exist in class %s\n", p, c);
-			return 1;
-		}
-		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_irule(src->s.value, tgt->s.value, cls->s.value, perm->s.value, effect, not, policy);
-}
-
 int add_typerule(char *s, char *targetAttribute, char **minusses, char *c, char *p, int effect, int not, policydb_t *policy) {
 	type_datum_t *src, *tgt;
 	class_datum_t *cls;
@@ -433,8 +397,7 @@ int load_policy(char *filename, policydb_t *policydb, struct policy_file *pf) {
 	return 0;
 }
 
-int auto_allow(type_datum_t *src, type_datum_t *tgt, class_datum_t *cls, policydb_t *policy) {
+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) {
-	perm_datum_t *perm;
 	hashtab_t type_table, class_table, perm_table;
 	hashtab_ptr_t cur;
 	
@@ -446,7 +409,7 @@ int auto_allow(type_datum_t *src, type_datum_t *tgt, class_datum_t *cls, policyd
 			cur = type_table->htable[i];
 			while (cur != NULL) {
 				src = cur->datum;
-				if(auto_allow(src, tgt, cls, policy))
+				if(add_rule_auto(src, tgt, cls, perm, effect, not, policy))
 					return 1;
 				cur = cur->next;
 			}
@@ -456,7 +419,7 @@ int auto_allow(type_datum_t *src, type_datum_t *tgt, class_datum_t *cls, policyd
 			cur = type_table->htable[i];
 			while (cur != NULL) {
 				tgt = cur->datum;
-				if(auto_allow(src, tgt, cls, policy))
+				if(add_rule_auto(src, tgt, cls, perm, effect, not, policy))
 					return 1;
 				cur = cur->next;
 			}
@@ -466,18 +429,18 @@ int auto_allow(type_datum_t *src, type_datum_t *tgt, class_datum_t *cls, policyd
 			cur = class_table->htable[i];
 			while (cur != NULL) {
 				cls = cur->datum;
-				if(auto_allow(src, tgt, cls, policy))
+				if(add_rule_auto(src, tgt, cls, perm, effect, not, policy))
 					return 1;
 				cur = cur->next;
 			}
 		}
-	} else {
+	} else if (perm == NULL) {
 		perm_table = cls->permissions.table;
 		for (int i = 0; i < perm_table->size; ++i) {
 			cur = perm_table->htable[i];
 			while (cur != NULL) {
 				perm = cur->datum;
-				if(add_irule(src->s.value, tgt->s.value, cls->s.value, perm->s.value, AVTAB_ALLOWED, 0, policy))
+				if(add_irule(src->s.value, tgt->s.value, cls->s.value, perm->s.value, effect, not, policy))
 					return 1;
 				cur = cur->next;
 			}
@@ -489,16 +452,67 @@ int auto_allow(type_datum_t *src, type_datum_t *tgt, class_datum_t *cls, policyd
 				cur = perm_table->htable[i];
 				while (cur != NULL) {
 					perm = cur->datum;
-					if(add_irule(src->s.value, tgt->s.value, cls->s.value, perm->s.value, AVTAB_ALLOWED, 0, policy))
+					if(add_irule(src->s.value, tgt->s.value, cls->s.value, perm->s.value, effect, not, policy))
 						return 1;
 					cur = cur->next;
 				}
 			}
 		}
+	} else {
+		return add_irule(src->s.value, tgt->s.value, cls->s.value, perm->s.value, effect, not, policy);
 	}
 	return 0;
 }
 
+int add_rule(char *s, char *t, char *c, char *p, int effect, int not, policydb_t *policy) {
+	type_datum_t *src = NULL, *tgt = NULL;
+	class_datum_t *cls = NULL;
+	perm_datum_t *perm = NULL;
+
+	if (s) {
+		src = hashtab_search(policy->p_types.table, s);
+		if (src == NULL) {
+			fprintf(stderr, "source type %s does not exist\n", s);
+			return 1;
+		}
+	}
+
+	if (t) {
+		tgt = hashtab_search(policy->p_types.table, t);
+		if (tgt == NULL) {
+			fprintf(stderr, "target type %s does not exist\n", t);
+			return 1;
+		}
+	}
+
+	if (c) {
+		cls = hashtab_search(policy->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, policy);
+}
+
 int live_patch(policydb_t *policydb) {
 	char *filename = "/sys/fs/selinux/load";
 	int fd, ret;
@@ -506,6 +520,7 @@ int live_patch(policydb_t *policydb) {
 	size_t len;
 
 	policydb_to_image(NULL, policydb, &data, &len);
+	if (data == NULL) fprintf(stderr, "Error!");
 
 	// based on libselinux security_load_policy()
 	fd = open(filename, O_RDWR);
@@ -528,7 +543,7 @@ int main(int argc, char **argv)
 {
 	char *policy = NULL, *source = NULL, *target = NULL, *class = NULL, *perm = NULL;
 	char *fcon = NULL, *outfile = NULL, *permissive = NULL, *attr = NULL, *filetrans = NULL;
-	int exists = 0, not = 0, autoAllow = 0, live = 0;
+	int exists = 0, not = 0, live = 0, builtin = 0;
 	policydb_t policydb;
 	struct policy_file pf, outpf;
 	sidtab_t sidtab;
@@ -546,12 +561,11 @@ int main(int argc, char **argv)
 		{"fcon", required_argument, NULL, 'f'},
 		{"filetransition", required_argument, NULL, 'g'},
 		{"noaudit", no_argument, NULL, 'n'},
-		{"policy", required_argument, NULL, 'P'},
+		{"file", required_argument, NULL, 'P'},
 		{"output", required_argument, NULL, 'o'},
 		{"permissive", required_argument, NULL, 'Z'},
 		{"not-permissive", required_argument, NULL, 'z'},
 		{"not", no_argument, NULL, 0},
-		{"auto", no_argument, NULL, 0},
 		{"live", no_argument, NULL, 0},
 		{NULL, 0, NULL, 0}
 	};
@@ -562,8 +576,6 @@ int main(int argc, char **argv)
 			case 0:
 				if(strcmp(long_options[option_index].name, "not") == 0)
 					not = 1;
-				else if(strcmp(long_options[option_index].name, "auto") == 0)
-					autoAllow = 1;
 				else if(strcmp(long_options[option_index].name, "live") == 0)
 					live = 1;
 				else
@@ -615,12 +627,15 @@ int main(int argc, char **argv)
 			}
 	}
 
-	if ((!source || !target || !class || !perm) && !permissive && !fcon && !attr &&!filetrans && !exists && !auto_allow )
+	// Use builtin rules if nothing specified
-		usage(argv[0]);
+	if (!source && !target && !class && !perm && !permissive && !fcon && !attr &&!filetrans && !exists)
+		builtin = 1;
 
+	// Overwrite original if not specified
 	if(!outfile)
 		outfile = policy;
 
+	// Use current policy if not specified
 	if(!policy)
 		policy = "/sys/fs/selinux/policy";
 
@@ -635,18 +650,11 @@ int main(int argc, char **argv)
 	if (policydb_load_isids(&policydb, &sidtab))
 		return 1;
 
-	if (autoAllow) {
+	if (builtin) {
-		type_datum_t *src = NULL, *tgt = NULL;
+		// TODO: Create builtin rules
-		class_datum_t *cls = NULL;
+		// builtin(&policydb);
-		if (source)
+	}
-			src = hashtab_search(policydb.p_types.table, source);
+	else if (permissive) {
-		if (target)
-			tgt = hashtab_search(policydb.p_types.table, target);
-		if (class)
-			cls = hashtab_search(policydb.p_classes.table, class);
-		if (auto_allow(src, tgt, cls, &policydb))
-			return 1;
-	} else if (permissive) {
 		type_datum_t *type;
 		create_domain(permissive, &policydb);
 		type = hashtab_search(policydb.p_types.table, permissive);
@@ -688,6 +696,7 @@ int main(int argc, char **argv)
 			return 1;
 	} else {
 		//Add a rule to a whole set of typeattribute, not just a type
+		if (target != NULL) {
 			if(*target == '=') {
 				char *saveptr = NULL;
 
@@ -704,7 +713,9 @@ int main(int argc, char **argv)
 
 				if(add_typerule(source, targetAttribute+1, vals, class, perm, AVTAB_ALLOWED, not, &policydb))
 					return 1;
-		} else {
+			}
+		}
+		if (perm != NULL) {
 			char *saveptr = NULL;
 
 			char *p = strtok_r(perm, ",", &saveptr);
@@ -714,6 +725,11 @@ int main(int argc, char **argv)
 					return 1;
 				}
 			} while( (p = strtok_r(NULL, ",", &saveptr)) != NULL);
+		} else {
+			if (add_rule(source, target, class, perm, AVTAB_ALLOWED, not, &policydb)) {
+				fprintf(stderr, "Could not add rule\n");
+				return 1;
+			}
 		}
 	}