/* * Copyright 2011 Tresys Technology, LLC. All rights reserved. * * Redistribution and use in source and binary forms, with or without * modification, are permitted provided that the following conditions are met: * * 1. Redistributions of source code must retain the above copyright notice, * this list of conditions and the following disclaimer. * * 2. Redistributions in binary form must reproduce the above copyright notice, * this list of conditions and the following disclaimer in the documentation * and/or other materials provided with the distribution. * * THIS SOFTWARE IS PROVIDED BY TRESYS TECHNOLOGY, LLC ``AS IS'' AND ANY EXPRESS * OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO * EVENT SHALL TRESYS TECHNOLOGY, LLC OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, * INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, * BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF * LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE * OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF * ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. * * The views and conclusions contained in the software and documentation are those * of the authors and should not be interpreted as representing official policies, * either expressed or implied, of Tresys Technology, LLC. */ #include #include #include #include #ifndef IPPROTO_DCCP #define IPPROTO_DCCP 33 #endif #ifndef IPPROTO_SCTP #define IPPROTO_SCTP 132 #endif #include #include #include #include #include #include #include #include "cil_internal.h" #include "cil_flavor.h" #include "cil_log.h" #include "cil_mem.h" #include "cil_tree.h" #include "cil_binary.h" #include "cil_symtab.h" #include "cil_find.h" #include "cil_build_ast.h" /* There are 44000 filename_trans in current fedora policy. 1.33 times this is the recommended * size of a hashtable. The next power of 2 of this is 2 ** 16. */ #define FILENAME_TRANS_TABLE_SIZE (1 << 16) #define RANGE_TRANS_TABLE_SIZE (1 << 13) #define ROLE_TRANS_TABLE_SIZE (1 << 10) #define AVRULEX_TABLE_SIZE (1 << 10) #define PERMS_PER_CLASS 32 struct cil_args_binary { const struct cil_db *db; policydb_t *pdb; struct cil_list *neverallows; int pass; hashtab_t filename_trans_table; hashtab_t range_trans_table; hashtab_t role_trans_table; hashtab_t avrulex_ioctl_table; void **type_value_to_cil; }; struct cil_args_booleanif { const struct cil_db *db; policydb_t *pdb; cond_node_t *cond_node; enum cil_flavor cond_flavor; hashtab_t filename_trans_table; }; static int __cil_get_sepol_user_datum(policydb_t *pdb, struct cil_symtab_datum *datum, user_datum_t **sepol_user) { *sepol_user = hashtab_search(pdb->p_users.table, datum->fqn); if (*sepol_user == NULL) { cil_log(CIL_INFO, "Failed to find user %s in sepol hashtab\n", datum->fqn); return SEPOL_ERR; } return SEPOL_OK; } static int __cil_get_sepol_role_datum(policydb_t *pdb, struct cil_symtab_datum *datum, role_datum_t **sepol_role) { *sepol_role = hashtab_search(pdb->p_roles.table, datum->fqn); if (*sepol_role == NULL) { cil_log(CIL_INFO, "Failed to find role %s in sepol hashtab\n", datum->fqn); return SEPOL_ERR; } return SEPOL_OK; } static int __cil_get_sepol_type_datum(policydb_t *pdb, struct cil_symtab_datum *datum, type_datum_t **sepol_type) { *sepol_type = hashtab_search(pdb->p_types.table, datum->fqn); if (*sepol_type == NULL) { cil_log(CIL_INFO, "Failed to find type %s in sepol hashtab\n", datum->fqn); return SEPOL_ERR; } return SEPOL_OK; } static int __cil_get_sepol_class_datum(policydb_t *pdb, struct cil_symtab_datum *datum, class_datum_t **sepol_class) { *sepol_class = hashtab_search(pdb->p_classes.table, datum->fqn); if (*sepol_class == NULL) { cil_log(CIL_INFO, "Failed to find class %s in sepol hashtab\n", datum->fqn); return SEPOL_ERR; } return SEPOL_OK; } static int __cil_get_sepol_cat_datum(policydb_t *pdb, struct cil_symtab_datum *datum, cat_datum_t **sepol_cat) { *sepol_cat = hashtab_search(pdb->p_cats.table, datum->fqn); if (*sepol_cat == NULL) { cil_log(CIL_INFO, "Failed to find category %s in sepol hashtab\n", datum->fqn); return SEPOL_ERR; } return SEPOL_OK; } static int __cil_get_sepol_level_datum(policydb_t *pdb, struct cil_symtab_datum *datum, level_datum_t **sepol_level) { *sepol_level = hashtab_search(pdb->p_levels.table, datum->fqn); if (*sepol_level == NULL) { cil_log(CIL_INFO, "Failed to find level %s in sepol hashtab\n", datum->fqn); return SEPOL_ERR; } return SEPOL_OK; } static int __cil_expand_user(struct cil_symtab_datum *datum, ebitmap_t *new) { struct cil_tree_node *node = datum->nodes->head->data; struct cil_user *user = NULL; struct cil_userattribute *attr = NULL; if (node->flavor == CIL_USERATTRIBUTE) { attr = (struct cil_userattribute *)datum; if (ebitmap_cpy(new, attr->users)) { cil_log(CIL_ERR, "Failed to copy user bits\n"); goto exit; } } else { user = (struct cil_user *)datum; ebitmap_init(new); if (ebitmap_set_bit(new, user->value, 1)) { cil_log(CIL_ERR, "Failed to set user bit\n"); ebitmap_destroy(new); goto exit; } } return SEPOL_OK; exit: return SEPOL_ERR; } static int __cil_expand_role(struct cil_symtab_datum *datum, ebitmap_t *new) { struct cil_tree_node *node = datum->nodes->head->data; if (node->flavor == CIL_ROLEATTRIBUTE) { struct cil_roleattribute *attr = (struct cil_roleattribute *)datum; if (ebitmap_cpy(new, attr->roles)) { cil_log(CIL_ERR, "Failed to copy role bits\n"); goto exit; } } else { struct cil_role *role = (struct cil_role *)datum; ebitmap_init(new); if (ebitmap_set_bit(new, role->value, 1)) { cil_log(CIL_ERR, "Failed to set role bit\n"); ebitmap_destroy(new); goto exit; } } return SEPOL_OK; exit: return SEPOL_ERR; } static int __cil_expand_type(struct cil_symtab_datum *datum, ebitmap_t *new) { struct cil_tree_node *node = datum->nodes->head->data; if (node->flavor == CIL_TYPEATTRIBUTE) { struct cil_typeattribute *attr = (struct cil_typeattribute *)datum; if (ebitmap_cpy(new, attr->types)) { cil_log(CIL_ERR, "Failed to copy type bits\n"); goto exit; } } else { struct cil_type *type = (struct cil_type *)datum; ebitmap_init(new); if (ebitmap_set_bit(new, type->value, 1)) { cil_log(CIL_ERR, "Failed to set type bit\n"); ebitmap_destroy(new); goto exit; } } return SEPOL_OK; exit: return SEPOL_ERR; } static ocontext_t *cil_add_ocontext(ocontext_t **head, ocontext_t **tail) { ocontext_t *new = cil_malloc(sizeof(ocontext_t)); memset(new, 0, sizeof(ocontext_t)); if (*tail) { (*tail)->next = new; } else { *head = new; } *tail = new; return new; } int cil_common_to_policydb(policydb_t *pdb, struct cil_class *cil_common, common_datum_t **common_out) { int rc = SEPOL_ERR; uint32_t value = 0; char *key = NULL; struct cil_tree_node *node = cil_common->datum.nodes->head->data; struct cil_tree_node *cil_perm = node->cl_head; common_datum_t *sepol_common = cil_malloc(sizeof(*sepol_common)); memset(sepol_common, 0, sizeof(common_datum_t)); key = cil_strdup(cil_common->datum.fqn); rc = symtab_insert(pdb, SYM_COMMONS, key, sepol_common, SCOPE_DECL, 0, &value); if (rc != SEPOL_OK) { free(sepol_common); goto exit; } sepol_common->s.value = value; rc = symtab_init(&sepol_common->permissions, PERM_SYMTAB_SIZE); if (rc != SEPOL_OK) { goto exit; } while (cil_perm != NULL) { struct cil_perm *curr = cil_perm->data; perm_datum_t *sepol_perm = cil_malloc(sizeof(*sepol_perm)); memset(sepol_perm, 0, sizeof(perm_datum_t)); key = cil_strdup(curr->datum.fqn); rc = hashtab_insert(sepol_common->permissions.table, key, sepol_perm); if (rc != SEPOL_OK) { free(sepol_perm); goto exit; } sepol_perm->s.value = sepol_common->permissions.nprim + 1; sepol_common->permissions.nprim++; cil_perm = cil_perm->next; } *common_out = sepol_common; return SEPOL_OK; exit: free(key); return rc; } int cil_classorder_to_policydb(policydb_t *pdb, const struct cil_db *db, struct cil_class *class_value_to_cil[], struct cil_perm **perm_value_to_cil[]) { int rc = SEPOL_ERR; struct cil_list_item *curr_class; cil_list_for_each(curr_class, db->classorder) { struct cil_class *cil_class = curr_class->data; uint32_t value = 0; char *key = NULL; int class_index; struct cil_tree_node *curr; common_datum_t *sepol_common = NULL; class_datum_t *sepol_class = cil_malloc(sizeof(*sepol_class)); memset(sepol_class, 0, sizeof(class_datum_t)); key = cil_strdup(cil_class->datum.fqn); rc = symtab_insert(pdb, SYM_CLASSES, key, sepol_class, SCOPE_DECL, 0, &value); if (rc != SEPOL_OK) { free(sepol_class); free(key); goto exit; } sepol_class->s.value = value; class_index = value; class_value_to_cil[class_index] = cil_class; rc = symtab_init(&sepol_class->permissions, PERM_SYMTAB_SIZE); if (rc != SEPOL_OK) { goto exit; } if (cil_class->common != NULL) { int i; struct cil_class *cil_common = cil_class->common; key = cil_class->common->datum.fqn; sepol_common = hashtab_search(pdb->p_commons.table, key); if (sepol_common == NULL) { rc = cil_common_to_policydb(pdb, cil_common, &sepol_common); if (rc != SEPOL_OK) { goto exit; } } sepol_class->comdatum = sepol_common; sepol_class->comkey = cil_strdup(key); sepol_class->permissions.nprim += sepol_common->permissions.nprim; for (curr = NODE(cil_class->common)->cl_head, i = 1; curr; curr = curr->next, i++) { struct cil_perm *cil_perm = curr->data; perm_value_to_cil[class_index][i] = cil_perm; } } for (curr = NODE(cil_class)->cl_head; curr; curr = curr->next) { struct cil_perm *cil_perm = curr->data; perm_datum_t *sepol_perm = cil_malloc(sizeof(*sepol_perm)); memset(sepol_perm, 0, sizeof(perm_datum_t)); key = cil_strdup(cil_perm->datum.fqn); rc = hashtab_insert(sepol_class->permissions.table, key, sepol_perm); if (rc != SEPOL_OK) { free(sepol_perm); free(key); goto exit; } sepol_perm->s.value = sepol_class->permissions.nprim + 1; sepol_class->permissions.nprim++; perm_value_to_cil[class_index][sepol_perm->s.value] = cil_perm; } } return SEPOL_OK; exit: return rc; } int cil_role_to_policydb(policydb_t *pdb, struct cil_role *cil_role) { int rc = SEPOL_ERR; uint32_t value = 0; char *key = NULL; role_datum_t *sepol_role = cil_malloc(sizeof(*sepol_role)); role_datum_init(sepol_role); if (cil_role->datum.fqn == CIL_KEY_OBJECT_R) { /* special case * object_r defaults to 1 in libsepol symtab */ rc = SEPOL_OK; goto exit; } key = cil_strdup(cil_role->datum.fqn); rc = symtab_insert(pdb, SYM_ROLES, (hashtab_key_t)key, sepol_role, SCOPE_DECL, 0, &value); if (rc != SEPOL_OK) { goto exit; } if (ebitmap_set_bit(&sepol_role->dominates, value - 1, 1)) { cil_log(CIL_INFO, "Failed to set dominates bit for role\n"); rc = SEPOL_ERR; goto exit; } sepol_role->s.value = value; return SEPOL_OK; exit: free(key); role_datum_destroy(sepol_role); free(sepol_role); return rc; } int cil_role_bounds_to_policydb(policydb_t *pdb, struct cil_role *cil_role) { int rc = SEPOL_ERR; role_datum_t *sepol_role = NULL; role_datum_t *sepol_parent = NULL; if (cil_role->bounds) { rc = __cil_get_sepol_role_datum(pdb, DATUM(cil_role), &sepol_role); if (rc != SEPOL_OK) goto exit; rc = __cil_get_sepol_role_datum(pdb, DATUM(cil_role->bounds), &sepol_parent); if (rc != SEPOL_OK) goto exit; sepol_role->bounds = sepol_parent->s.value; } return SEPOL_OK; exit: cil_log(CIL_ERR, "Failed to insert role bounds for role %s\n", cil_role->datum.fqn); return SEPOL_ERR; } int cil_roletype_to_policydb(policydb_t *pdb, const struct cil_db *db, struct cil_role *role) { int rc = SEPOL_ERR; if (role->types) { role_datum_t *sepol_role = NULL; type_datum_t *sepol_type = NULL; ebitmap_node_t *tnode; unsigned int i; rc = __cil_get_sepol_role_datum(pdb, DATUM(role), &sepol_role); if (rc != SEPOL_OK) goto exit; ebitmap_for_each_bit(role->types, tnode, i) { if (!ebitmap_get_bit(role->types, i)) continue; rc = __cil_get_sepol_type_datum(pdb, DATUM(db->val_to_type[i]), &sepol_type); if (rc != SEPOL_OK) goto exit; if (ebitmap_set_bit(&sepol_role->types.types, sepol_type->s.value - 1, 1)) { cil_log(CIL_INFO, "Failed to set type bit for role\n"); rc = SEPOL_ERR; goto exit; } } } return SEPOL_OK; exit: return rc; } int cil_type_to_policydb(policydb_t *pdb, struct cil_type *cil_type, void *type_value_to_cil[]) { int rc = SEPOL_ERR; uint32_t value = 0; char *key = NULL; type_datum_t *sepol_type = cil_malloc(sizeof(*sepol_type)); type_datum_init(sepol_type); sepol_type->flavor = TYPE_TYPE; key = cil_strdup(cil_type->datum.fqn); rc = symtab_insert(pdb, SYM_TYPES, key, sepol_type, SCOPE_DECL, 0, &value); if (rc != SEPOL_OK) { goto exit; } sepol_type->s.value = value; sepol_type->primary = 1; type_value_to_cil[value] = cil_type; return SEPOL_OK; exit: free(key); type_datum_destroy(sepol_type); free(sepol_type); return rc; } int cil_type_bounds_to_policydb(policydb_t *pdb, struct cil_type *cil_type) { int rc = SEPOL_ERR; type_datum_t *sepol_type = NULL; type_datum_t *sepol_parent = NULL; if (cil_type->bounds) { rc = __cil_get_sepol_type_datum(pdb, DATUM(cil_type), &sepol_type); if (rc != SEPOL_OK) goto exit; rc = __cil_get_sepol_type_datum(pdb, DATUM(cil_type->bounds), &sepol_parent); if (rc != SEPOL_OK) goto exit; sepol_type->bounds = sepol_parent->s.value; } return SEPOL_OK; exit: cil_log(CIL_ERR, "Failed to insert type bounds for type %s\n", cil_type->datum.fqn); return SEPOL_ERR; } int cil_typealias_to_policydb(policydb_t *pdb, struct cil_alias *cil_alias) { int rc = SEPOL_ERR; char *key = NULL; type_datum_t *sepol_type = NULL; type_datum_t *sepol_alias = cil_malloc(sizeof(*sepol_alias)); type_datum_init(sepol_alias); rc = __cil_get_sepol_type_datum(pdb, DATUM(cil_alias->actual), &sepol_type); if (rc != SEPOL_OK) goto exit; sepol_alias->flavor = TYPE_TYPE; key = cil_strdup(cil_alias->datum.fqn); rc = symtab_insert(pdb, SYM_TYPES, key, sepol_alias, SCOPE_DECL, 0, NULL); if (rc != SEPOL_OK) { goto exit; } sepol_alias->s.value = sepol_type->s.value; sepol_alias->primary = 0; return SEPOL_OK; exit: free(key); type_datum_destroy(sepol_alias); free(sepol_alias); return rc; } int cil_typepermissive_to_policydb(policydb_t *pdb, struct cil_typepermissive *cil_typeperm) { int rc = SEPOL_ERR; type_datum_t *sepol_type = NULL; rc = __cil_get_sepol_type_datum(pdb, DATUM(cil_typeperm->type), &sepol_type); if (rc != SEPOL_OK) goto exit; if (ebitmap_set_bit(&pdb->permissive_map, sepol_type->s.value, 1)) { goto exit; } return SEPOL_OK; exit: type_datum_destroy(sepol_type); free(sepol_type); return rc; } int cil_typeattribute_to_policydb(policydb_t *pdb, struct cil_typeattribute *cil_attr, void *type_value_to_cil[]) { int rc = SEPOL_ERR; uint32_t value = 0; char *key = NULL; type_datum_t *sepol_attr = NULL; if (!cil_attr->keep) { return SEPOL_OK; } sepol_attr = cil_malloc(sizeof(*sepol_attr)); type_datum_init(sepol_attr); sepol_attr->flavor = TYPE_ATTRIB; key = cil_strdup(cil_attr->datum.fqn); rc = symtab_insert(pdb, SYM_TYPES, key, sepol_attr, SCOPE_DECL, 0, &value); if (rc != SEPOL_OK) { goto exit; } sepol_attr->s.value = value; sepol_attr->primary = 1; type_value_to_cil[value] = cil_attr; return SEPOL_OK; exit: type_datum_destroy(sepol_attr); free(sepol_attr); return rc; } int __cil_typeattr_bitmap_init(policydb_t *pdb) { int rc = SEPOL_ERR; pdb->type_attr_map = cil_malloc(pdb->p_types.nprim * sizeof(ebitmap_t)); pdb->attr_type_map = cil_malloc(pdb->p_types.nprim * sizeof(ebitmap_t)); uint32_t i = 0; for (i = 0; i < pdb->p_types.nprim; i++) { ebitmap_init(&pdb->type_attr_map[i]); ebitmap_init(&pdb->attr_type_map[i]); if (ebitmap_set_bit(&pdb->type_attr_map[i], i, 1)) { rc = SEPOL_ERR; goto exit; } if (pdb->type_val_to_struct[i] && pdb->type_val_to_struct[i]->flavor != TYPE_ATTRIB) { if (ebitmap_set_bit(&pdb->attr_type_map[i], i, 1)) { rc = SEPOL_ERR; goto exit; } } } return SEPOL_OK; exit: return rc; } int cil_typeattribute_to_bitmap(policydb_t *pdb, const struct cil_db *db, struct cil_typeattribute *cil_attr) { int rc = SEPOL_ERR; uint32_t value = 0; type_datum_t *sepol_type = NULL; ebitmap_node_t *tnode; unsigned int i; if (!cil_attr->keep) { return SEPOL_OK; } if (pdb->type_attr_map == NULL) { rc = __cil_typeattr_bitmap_init(pdb); if (rc != SEPOL_OK) { goto exit; } } rc = __cil_get_sepol_type_datum(pdb, DATUM(cil_attr), &sepol_type); if (rc != SEPOL_OK) goto exit; value = sepol_type->s.value; ebitmap_for_each_bit(cil_attr->types, tnode, i) { if (!ebitmap_get_bit(cil_attr->types, i)) continue; rc = __cil_get_sepol_type_datum(pdb, DATUM(db->val_to_type[i]), &sepol_type); if (rc != SEPOL_OK) goto exit; ebitmap_set_bit(&pdb->type_attr_map[sepol_type->s.value - 1], value - 1, 1); ebitmap_set_bit(&pdb->attr_type_map[value - 1], sepol_type->s.value - 1, 1); } rc = SEPOL_OK; exit: return rc; } int cil_policycap_to_policydb(policydb_t *pdb, struct cil_policycap *cil_polcap) { int rc = SEPOL_ERR; int capnum; capnum = sepol_polcap_getnum(cil_polcap->datum.fqn); if (capnum == -1) { goto exit; } if (ebitmap_set_bit(&pdb->policycaps, capnum, 1)) { goto exit; } return SEPOL_OK; exit: return rc; } int cil_user_to_policydb(policydb_t *pdb, struct cil_user *cil_user) { int rc = SEPOL_ERR; uint32_t value = 0; char *key = NULL; user_datum_t *sepol_user = cil_malloc(sizeof(*sepol_user)); user_datum_init(sepol_user); key = cil_strdup(cil_user->datum.fqn); rc = symtab_insert(pdb, SYM_USERS, key, sepol_user, SCOPE_DECL, 0, &value); if (rc != SEPOL_OK) { goto exit; } sepol_user->s.value = value; return SEPOL_OK; exit: free(key); user_datum_destroy(sepol_user); free(sepol_user); return rc; } int cil_user_bounds_to_policydb(policydb_t *pdb, struct cil_user *cil_user) { int rc = SEPOL_ERR; user_datum_t *sepol_user = NULL; user_datum_t *sepol_parent = NULL; if (cil_user->bounds) { rc = __cil_get_sepol_user_datum(pdb, DATUM(cil_user), &sepol_user); if (rc != SEPOL_OK) goto exit; rc = __cil_get_sepol_user_datum(pdb, DATUM(cil_user->bounds), &sepol_parent); if (rc != SEPOL_OK) goto exit; sepol_user->bounds = sepol_parent->s.value; } return SEPOL_OK; exit: cil_log(CIL_ERR, "Failed to insert user bounds for user %s\n", cil_user->datum.fqn); return SEPOL_ERR; } int cil_userrole_to_policydb(policydb_t *pdb, const struct cil_db *db, struct cil_user *user) { int rc = SEPOL_ERR; user_datum_t *sepol_user = NULL; role_datum_t *sepol_role = NULL; ebitmap_node_t *rnode = NULL; unsigned int i; if (user->roles) { rc = __cil_get_sepol_user_datum(pdb, DATUM(user), &sepol_user); if (rc != SEPOL_OK) { goto exit; } ebitmap_for_each_bit(user->roles, rnode, i) { if (!ebitmap_get_bit(user->roles, i)) { continue; } rc = __cil_get_sepol_role_datum(pdb, DATUM(db->val_to_role[i]), &sepol_role); if (rc != SEPOL_OK) { goto exit; } if (sepol_role->s.value == 1) { // role is object_r, ignore it since it is implicitly associated // with all users continue; } if (ebitmap_set_bit(&sepol_user->roles.roles, sepol_role->s.value - 1, 1)) { cil_log(CIL_INFO, "Failed to set role bit for user\n"); rc = SEPOL_ERR; goto exit; } } } rc = SEPOL_OK; exit: return rc; } int cil_bool_to_policydb(policydb_t *pdb, struct cil_bool *cil_bool) { int rc = SEPOL_ERR; uint32_t value = 0; char *key = NULL; cond_bool_datum_t *sepol_bool = cil_malloc(sizeof(*sepol_bool)); memset(sepol_bool, 0, sizeof(cond_bool_datum_t)); key = cil_strdup(cil_bool->datum.fqn); rc = symtab_insert(pdb, SYM_BOOLS, key, sepol_bool, SCOPE_DECL, 0, &value); if (rc != SEPOL_OK) { goto exit; } sepol_bool->s.value = value; sepol_bool->state = cil_bool->value; return SEPOL_OK; exit: free(key); free(sepol_bool); return rc; } int cil_catorder_to_policydb(policydb_t *pdb, const struct cil_db *db) { int rc = SEPOL_ERR; uint32_t value = 0; char *key = NULL; struct cil_list_item *curr_cat; struct cil_cat *cil_cat = NULL; cat_datum_t *sepol_cat = NULL; cil_list_for_each(curr_cat, db->catorder) { cil_cat = curr_cat->data; sepol_cat = cil_malloc(sizeof(*sepol_cat)); cat_datum_init(sepol_cat); key = cil_strdup(cil_cat->datum.fqn); rc = symtab_insert(pdb, SYM_CATS, key, sepol_cat, SCOPE_DECL, 0, &value); if (rc != SEPOL_OK) { goto exit; } sepol_cat->s.value = value; } return SEPOL_OK; exit: free(key); cat_datum_destroy(sepol_cat); free(sepol_cat); return rc; } int cil_catalias_to_policydb(policydb_t *pdb, struct cil_alias *cil_alias) { int rc = SEPOL_ERR; char *key = NULL; cat_datum_t *sepol_cat; cat_datum_t *sepol_alias = cil_malloc(sizeof(*sepol_cat)); cat_datum_init(sepol_alias); rc = __cil_get_sepol_cat_datum(pdb, DATUM(cil_alias->actual), &sepol_cat); if (rc != SEPOL_OK) goto exit; key = cil_strdup(cil_alias->datum.fqn); rc = symtab_insert(pdb, SYM_CATS, key, sepol_alias, SCOPE_DECL, 0, NULL); if (rc != SEPOL_OK) { goto exit; } sepol_alias->s.value = sepol_cat->s.value; sepol_alias->isalias = 1; return SEPOL_OK; exit: free(key); cat_datum_destroy(sepol_alias); free(sepol_alias); return rc; } int cil_sensitivityorder_to_policydb(policydb_t *pdb, const struct cil_db *db) { int rc = SEPOL_ERR; uint32_t value = 0; char *key = NULL; struct cil_list_item *curr; struct cil_sens *cil_sens = NULL; level_datum_t *sepol_level = NULL; mls_level_t *mls_level = NULL; cil_list_for_each(curr, db->sensitivityorder) { cil_sens = curr->data; sepol_level = cil_malloc(sizeof(*sepol_level)); mls_level = cil_malloc(sizeof(*mls_level)); level_datum_init(sepol_level); mls_level_init(mls_level); key = cil_strdup(cil_sens->datum.fqn); rc = symtab_insert(pdb, SYM_LEVELS, key, sepol_level, SCOPE_DECL, 0, &value); if (rc != SEPOL_OK) { goto exit; } mls_level->sens = value; sepol_level->level = mls_level; } return SEPOL_OK; exit: level_datum_destroy(sepol_level); mls_level_destroy(mls_level); free(sepol_level); free(mls_level); free(key); return rc; } int cil_sensalias_to_policydb(policydb_t *pdb, struct cil_alias *cil_alias) { int rc = SEPOL_ERR; char *key = NULL; mls_level_t *mls_level = NULL; level_datum_t *sepol_level = NULL; level_datum_t *sepol_alias = cil_malloc(sizeof(*sepol_alias)); level_datum_init(sepol_alias); rc = __cil_get_sepol_level_datum(pdb, DATUM(cil_alias->actual), &sepol_level); if (rc != SEPOL_OK) goto exit; key = cil_strdup(cil_alias->datum.fqn); rc = symtab_insert(pdb, SYM_LEVELS, key, sepol_alias, SCOPE_DECL, 0, NULL); if (rc != SEPOL_OK) { goto exit; } mls_level = cil_malloc(sizeof(*mls_level)); mls_level_init(mls_level); rc = mls_level_cpy(mls_level, sepol_level->level); if (rc != SEPOL_OK) { goto exit; } sepol_alias->level = mls_level; sepol_alias->defined = 1; sepol_alias->isalias = 1; return SEPOL_OK; exit: level_datum_destroy(sepol_alias); free(sepol_alias); free(key); return rc; } int __cil_cond_insert_rule(avtab_t *avtab, avtab_key_t *avtab_key, avtab_datum_t *avtab_datum, cond_node_t *cond_node, enum cil_flavor cond_flavor) { int rc = SEPOL_OK; avtab_ptr_t avtab_ptr = NULL; cond_av_list_t *cond_list = NULL; avtab_ptr = avtab_insert_nonunique(avtab, avtab_key, avtab_datum); if (!avtab_ptr) { rc = SEPOL_ERR; goto exit; } // parse_context needs to be non-NULL for conditional rules to be // written to the binary. it is normally used for finding duplicates, // but cil checks that earlier, so we don't use it. it just needs to be // set avtab_ptr->parse_context = (void*)1; cond_list = cil_malloc(sizeof(cond_av_list_t)); memset(cond_list, 0, sizeof(cond_av_list_t)); cond_list->node = avtab_ptr; if (cond_flavor == CIL_CONDTRUE) { cond_list->next = cond_node->true_list; cond_node->true_list = cond_list; } else { cond_list->next = cond_node->false_list; cond_node->false_list = cond_list; } exit: return rc; } avtab_datum_t *cil_cond_av_list_search(avtab_key_t *key, cond_av_list_t *cond_list) { cond_av_list_t *cur_av; for (cur_av = cond_list; cur_av != NULL; cur_av = cur_av->next) { if (cur_av->node->key.source_type == key->source_type && cur_av->node->key.target_type == key->target_type && cur_av->node->key.target_class == key->target_class && (cur_av->node->key.specified & key->specified)) return &cur_av->node->datum; } return NULL; } int __cil_insert_type_rule(policydb_t *pdb, uint32_t kind, uint32_t src, uint32_t tgt, uint32_t obj, uint32_t res, struct cil_type_rule *cil_rule, cond_node_t *cond_node, enum cil_flavor cond_flavor) { int rc = SEPOL_OK; avtab_key_t avtab_key; avtab_datum_t avtab_datum; avtab_ptr_t existing; avtab_key.source_type = src; avtab_key.target_type = tgt; avtab_key.target_class = obj; switch (kind) { case CIL_TYPE_TRANSITION: avtab_key.specified = AVTAB_TRANSITION; break; case CIL_TYPE_CHANGE: avtab_key.specified = AVTAB_CHANGE; break; case CIL_TYPE_MEMBER: avtab_key.specified = AVTAB_MEMBER; break; default: rc = SEPOL_ERR; goto exit; } avtab_datum.data = res; existing = avtab_search_node(&pdb->te_avtab, &avtab_key); if (existing) { /* Don't add duplicate type rule and warn if they conflict. * A warning should have been previously given if there is a * non-duplicate rule using the same key. */ if (existing->datum.data != res) { cil_log(CIL_ERR, "Conflicting type rules (scontext=%s tcontext=%s tclass=%s result=%s), existing=%s\n", pdb->p_type_val_to_name[src - 1], pdb->p_type_val_to_name[tgt - 1], pdb->p_class_val_to_name[obj - 1], pdb->p_type_val_to_name[res - 1], pdb->p_type_val_to_name[existing->datum.data - 1]); cil_log(CIL_ERR, "Expanded from type rule (scontext=%s tcontext=%s tclass=%s result=%s)\n", cil_rule->src_str, cil_rule->tgt_str, cil_rule->obj_str, cil_rule->result_str); rc = SEPOL_ERR; } goto exit; } if (!cond_node) { rc = avtab_insert(&pdb->te_avtab, &avtab_key, &avtab_datum); } else { existing = avtab_search_node(&pdb->te_cond_avtab, &avtab_key); if (existing) { cond_av_list_t *this_list; cond_av_list_t *other_list; avtab_datum_t *search_datum; if (cond_flavor == CIL_CONDTRUE) { this_list = cond_node->true_list; other_list = cond_node->false_list; } else { this_list = cond_node->false_list; other_list = cond_node->true_list; } search_datum = cil_cond_av_list_search(&avtab_key, other_list); if (search_datum == NULL) { if (existing->datum.data != res) { cil_log(CIL_ERR, "Conflicting type rules (scontext=%s tcontext=%s tclass=%s result=%s), existing=%s\n", pdb->p_type_val_to_name[src - 1], pdb->p_type_val_to_name[tgt - 1], pdb->p_class_val_to_name[obj - 1], pdb->p_type_val_to_name[res - 1], pdb->p_type_val_to_name[existing->datum.data - 1]); cil_log(CIL_ERR, "Expanded from type rule (scontext=%s tcontext=%s tclass=%s result=%s)\n", cil_rule->src_str, cil_rule->tgt_str, cil_rule->obj_str, cil_rule->result_str); rc = SEPOL_ERR; goto exit; } search_datum = cil_cond_av_list_search(&avtab_key, this_list); if (search_datum) { goto exit; } } } rc = __cil_cond_insert_rule(&pdb->te_cond_avtab, &avtab_key, &avtab_datum, cond_node, cond_flavor); } exit: return rc; } int __cil_type_rule_to_avtab(policydb_t *pdb, const struct cil_db *db, struct cil_type_rule *cil_rule, cond_node_t *cond_node, enum cil_flavor cond_flavor) { int rc = SEPOL_ERR; uint16_t kind = cil_rule->rule_kind; type_datum_t *sepol_src = NULL; type_datum_t *sepol_tgt = NULL; class_datum_t *sepol_obj = NULL; struct cil_list *class_list; type_datum_t *sepol_result = NULL; ebitmap_t src_bitmap, tgt_bitmap; ebitmap_node_t *node1, *node2; unsigned int i, j; struct cil_list_item *c; rc = __cil_expand_type(cil_rule->src, &src_bitmap); if (rc != SEPOL_OK) goto exit; rc = __cil_expand_type(cil_rule->tgt, &tgt_bitmap); if (rc != SEPOL_OK) goto exit; class_list = cil_expand_class(cil_rule->obj); rc = __cil_get_sepol_type_datum(pdb, DATUM(cil_rule->result), &sepol_result); if (rc != SEPOL_OK) goto exit; ebitmap_for_each_bit(&src_bitmap, node1, i) { if (!ebitmap_get_bit(&src_bitmap, i)) continue; rc = __cil_get_sepol_type_datum(pdb, DATUM(db->val_to_type[i]), &sepol_src); if (rc != SEPOL_OK) goto exit; ebitmap_for_each_bit(&tgt_bitmap, node2, j) { if (!ebitmap_get_bit(&tgt_bitmap, j)) continue; rc = __cil_get_sepol_type_datum(pdb, DATUM(db->val_to_type[j]), &sepol_tgt); if (rc != SEPOL_OK) goto exit; cil_list_for_each(c, class_list) { rc = __cil_get_sepol_class_datum(pdb, DATUM(c->data), &sepol_obj); if (rc != SEPOL_OK) goto exit; rc = __cil_insert_type_rule(pdb, kind, sepol_src->s.value, sepol_tgt->s.value, sepol_obj->s.value, sepol_result->s.value, cil_rule, cond_node, cond_flavor); if (rc != SEPOL_OK) goto exit; } } } rc = SEPOL_OK; exit: ebitmap_destroy(&src_bitmap); ebitmap_destroy(&tgt_bitmap); cil_list_destroy(&class_list, CIL_FALSE); return rc; } int cil_type_rule_to_policydb(policydb_t *pdb, const struct cil_db *db, struct cil_type_rule *cil_rule) { return __cil_type_rule_to_avtab(pdb, db, cil_rule, NULL, CIL_FALSE); } int __cil_typetransition_to_avtab(policydb_t *pdb, const struct cil_db *db, struct cil_nametypetransition *typetrans, cond_node_t *cond_node, enum cil_flavor cond_flavor, hashtab_t filename_trans_table) { int rc = SEPOL_ERR; type_datum_t *sepol_src = NULL; type_datum_t *sepol_tgt = NULL; class_datum_t *sepol_obj = NULL; struct cil_list *class_list; type_datum_t *sepol_result = NULL; filename_trans_t *newkey = NULL; filename_trans_datum_t *newdatum = NULL, *otype = NULL; ebitmap_t src_bitmap, tgt_bitmap; ebitmap_node_t *node1, *node2; unsigned int i, j; struct cil_list_item *c; char *name = DATUM(typetrans->name)->name; if (name == CIL_KEY_STAR) { struct cil_type_rule trans; trans.rule_kind = CIL_TYPE_TRANSITION; trans.src = typetrans->src; trans.tgt = typetrans->tgt; trans.obj = typetrans->obj; trans.result = typetrans->result; trans.src_str = typetrans->src_str; trans.tgt_str = typetrans->tgt_str; trans.obj_str = typetrans->obj_str; trans.result_str = typetrans->result_str; return __cil_type_rule_to_avtab(pdb, db, &trans, cond_node, cond_flavor); } rc = __cil_expand_type(typetrans->src, &src_bitmap); if (rc != SEPOL_OK) goto exit; rc = __cil_expand_type(typetrans->tgt, &tgt_bitmap); if (rc != SEPOL_OK) goto exit; class_list = cil_expand_class(typetrans->obj); rc = __cil_get_sepol_type_datum(pdb, DATUM(typetrans->result), &sepol_result); if (rc != SEPOL_OK) goto exit; ebitmap_for_each_bit(&src_bitmap, node1, i) { if (!ebitmap_get_bit(&src_bitmap, i)) continue; rc = __cil_get_sepol_type_datum(pdb, DATUM(db->val_to_type[i]), &sepol_src); if (rc != SEPOL_OK) goto exit; ebitmap_for_each_bit(&tgt_bitmap, node2, j) { if (!ebitmap_get_bit(&tgt_bitmap, j)) continue; rc = __cil_get_sepol_type_datum(pdb, DATUM(db->val_to_type[j]), &sepol_tgt); if (rc != SEPOL_OK) goto exit; cil_list_for_each(c, class_list) { int add = CIL_TRUE; rc = __cil_get_sepol_class_datum(pdb, DATUM(c->data), &sepol_obj); if (rc != SEPOL_OK) goto exit; newkey = cil_calloc(1, sizeof(*newkey)); newdatum = cil_calloc(1, sizeof(*newdatum)); newkey->stype = sepol_src->s.value; newkey->ttype = sepol_tgt->s.value; newkey->tclass = sepol_obj->s.value; newkey->name = cil_strdup(name); newdatum->otype = sepol_result->s.value; rc = hashtab_insert(filename_trans_table, (hashtab_key_t)newkey, newdatum); if (rc != SEPOL_OK) { if (rc == SEPOL_EEXIST) { add = CIL_FALSE; otype = hashtab_search(filename_trans_table, (hashtab_key_t)newkey); if (newdatum->otype != otype->otype) { cil_log(CIL_ERR, "Conflicting name type transition rules\n"); } else { rc = SEPOL_OK; } } else { cil_log(CIL_ERR, "Out of memory\n"); } } if (add == CIL_TRUE) { rc = hashtab_insert(pdb->filename_trans, (hashtab_key_t)newkey, newdatum); if (rc != SEPOL_OK) { cil_log(CIL_ERR, "Out of memory\n"); goto exit; } } else { free(newkey->name); free(newkey); free(newdatum); if (rc != SEPOL_OK) { goto exit; } } } } } rc = SEPOL_OK; exit: ebitmap_destroy(&src_bitmap); ebitmap_destroy(&tgt_bitmap); cil_list_destroy(&class_list, CIL_FALSE); return rc; } int cil_typetransition_to_policydb(policydb_t *pdb, const struct cil_db *db, struct cil_nametypetransition *typetrans, hashtab_t filename_trans_table) { return __cil_typetransition_to_avtab(pdb, db, typetrans, NULL, CIL_FALSE, filename_trans_table); } int __perm_str_to_datum(char *perm_str, class_datum_t *sepol_class, uint32_t *datum) { int rc; perm_datum_t *sepol_perm; common_datum_t *sepol_common; sepol_perm = hashtab_search(sepol_class->permissions.table, perm_str); if (sepol_perm == NULL) { sepol_common = sepol_class->comdatum; sepol_perm = hashtab_search(sepol_common->permissions.table, perm_str); if (sepol_perm == NULL) { cil_log(CIL_ERR, "Failed to find datum for perm %s\n", perm_str); rc = SEPOL_ERR; goto exit; } } *datum |= 1 << (sepol_perm->s.value - 1); return SEPOL_OK; exit: return rc; } int __cil_perms_to_datum(struct cil_list *perms, class_datum_t *sepol_class, uint32_t *datum) { int rc = SEPOL_ERR; char *key = NULL; struct cil_list_item *curr_perm; struct cil_perm *cil_perm; uint32_t data = 0; cil_list_for_each(curr_perm, perms) { cil_perm = curr_perm->data; key = cil_perm->datum.fqn; rc = __perm_str_to_datum(key, sepol_class, &data); if (rc != SEPOL_OK) { goto exit; } } *datum = data; return SEPOL_OK; exit: return rc; } int __cil_insert_avrule(policydb_t *pdb, uint32_t kind, uint32_t src, uint32_t tgt, uint32_t obj, uint32_t data, cond_node_t *cond_node, enum cil_flavor cond_flavor) { int rc = SEPOL_OK; avtab_key_t avtab_key; avtab_datum_t avtab_datum; avtab_datum_t *avtab_dup = NULL; avtab_key.source_type = src; avtab_key.target_type = tgt; avtab_key.target_class = obj; switch (kind) { case CIL_AVRULE_ALLOWED: avtab_key.specified = AVTAB_ALLOWED; break; case CIL_AVRULE_AUDITALLOW: avtab_key.specified = AVTAB_AUDITALLOW; break; case CIL_AVRULE_DONTAUDIT: avtab_key.specified = AVTAB_AUDITDENY; break; default: rc = SEPOL_ERR; goto exit; break; } if (!cond_node) { avtab_dup = avtab_search(&pdb->te_avtab, &avtab_key); if (!avtab_dup) { avtab_datum.data = data; rc = avtab_insert(&pdb->te_avtab, &avtab_key, &avtab_datum); } else { if (kind == CIL_AVRULE_DONTAUDIT) avtab_dup->data &= data; else avtab_dup->data |= data; } } else { avtab_datum.data = data; rc = __cil_cond_insert_rule(&pdb->te_cond_avtab, &avtab_key, &avtab_datum, cond_node, cond_flavor); } exit: return rc; } int __cil_avrule_expand_helper(policydb_t *pdb, uint16_t kind, struct cil_symtab_datum *src, struct cil_symtab_datum *tgt, struct cil_classperms *cp, cond_node_t *cond_node, enum cil_flavor cond_flavor) { int rc = SEPOL_ERR; type_datum_t *sepol_src = NULL; type_datum_t *sepol_tgt = NULL; class_datum_t *sepol_class = NULL; uint32_t data = 0; rc = __cil_get_sepol_class_datum(pdb, DATUM(cp->class), &sepol_class); if (rc != SEPOL_OK) goto exit; rc = __cil_perms_to_datum(cp->perms, sepol_class, &data); if (rc != SEPOL_OK) goto exit; if (data == 0) { /* No permissions, so don't insert rule. Maybe should return an error? */ return SEPOL_OK; } if (kind == CIL_AVRULE_DONTAUDIT) { data = ~data; } rc = __cil_get_sepol_type_datum(pdb, src, &sepol_src); if (rc != SEPOL_OK) goto exit; rc = __cil_get_sepol_type_datum(pdb, tgt, &sepol_tgt); if (rc != SEPOL_OK) goto exit; rc = __cil_insert_avrule(pdb, kind, sepol_src->s.value, sepol_tgt->s.value, sepol_class->s.value, data, cond_node, cond_flavor); if (rc != SEPOL_OK) { goto exit; } return SEPOL_OK; exit: return rc; } int __cil_avrule_expand(policydb_t *pdb, uint16_t kind, struct cil_symtab_datum *src, struct cil_symtab_datum *tgt, struct cil_list *classperms, cond_node_t *cond_node, enum cil_flavor cond_flavor) { int rc = SEPOL_ERR; struct cil_list_item *curr; cil_list_for_each(curr, classperms) { if (curr->flavor == CIL_CLASSPERMS) { struct cil_classperms *cp = curr->data; if (FLAVOR(cp->class) == CIL_CLASS) { rc = __cil_avrule_expand_helper(pdb, kind, src, tgt, cp, cond_node, cond_flavor); if (rc != SEPOL_OK) { goto exit; } } else { /* MAP */ struct cil_list_item *i = NULL; cil_list_for_each(i, cp->perms) { struct cil_perm *cmp = i->data; rc = __cil_avrule_expand(pdb, kind, src, tgt, cmp->classperms, cond_node, cond_flavor); if (rc != SEPOL_OK) { goto exit; } } } } else { /* SET */ struct cil_classperms_set *cp_set = curr->data; struct cil_classpermission *cp = cp_set->set; rc = __cil_avrule_expand(pdb, kind, src, tgt, cp->classperms, cond_node, cond_flavor); if (rc != SEPOL_OK) { goto exit; } } } return SEPOL_OK; exit: return rc; } static int __cil_should_expand_attribute( const struct cil_db *db, struct cil_symtab_datum *datum) { struct cil_tree_node *node; struct cil_typeattribute *attr; node = NODE(datum); if (node->flavor != CIL_TYPEATTRIBUTE) { return CIL_FALSE; } attr = (struct cil_typeattribute *)datum; return !attr->keep || (ebitmap_cardinality(attr->types) < db->attrs_expand_size); } int __cil_avrule_to_avtab(policydb_t *pdb, const struct cil_db *db, struct cil_avrule *cil_avrule, cond_node_t *cond_node, enum cil_flavor cond_flavor) { int rc = SEPOL_ERR; uint16_t kind = cil_avrule->rule_kind; struct cil_symtab_datum *src = NULL; struct cil_symtab_datum *tgt = NULL; struct cil_list *classperms = cil_avrule->perms.classperms; ebitmap_t src_bitmap, tgt_bitmap; ebitmap_node_t *snode, *tnode; unsigned int s,t; if (cil_avrule->rule_kind == CIL_AVRULE_DONTAUDIT && db->disable_dontaudit == CIL_TRUE) { // Do not add dontaudit rules to binary rc = SEPOL_OK; goto exit; } src = cil_avrule->src; tgt = cil_avrule->tgt; if (tgt->fqn == CIL_KEY_SELF) { rc = __cil_expand_type(src, &src_bitmap); if (rc != SEPOL_OK) { goto exit; } ebitmap_for_each_bit(&src_bitmap, snode, s) { if (!ebitmap_get_bit(&src_bitmap, s)) continue; src = DATUM(db->val_to_type[s]); rc = __cil_avrule_expand(pdb, kind, src, src, classperms, cond_node, cond_flavor); if (rc != SEPOL_OK) { ebitmap_destroy(&src_bitmap); goto exit; } } ebitmap_destroy(&src_bitmap); } else { int expand_src = __cil_should_expand_attribute(db, src); int expand_tgt = __cil_should_expand_attribute(db, tgt); if (!expand_src && !expand_tgt) { rc = __cil_avrule_expand(pdb, kind, src, tgt, classperms, cond_node, cond_flavor); if (rc != SEPOL_OK) { goto exit; } } else if (expand_src && expand_tgt) { rc = __cil_expand_type(src, &src_bitmap); if (rc != SEPOL_OK) { goto exit; } rc = __cil_expand_type(tgt, &tgt_bitmap); if (rc != SEPOL_OK) { ebitmap_destroy(&src_bitmap); goto exit; } ebitmap_for_each_bit(&src_bitmap, snode, s) { if (!ebitmap_get_bit(&src_bitmap, s)) continue; src = DATUM(db->val_to_type[s]); ebitmap_for_each_bit(&tgt_bitmap, tnode, t) { if (!ebitmap_get_bit(&tgt_bitmap, t)) continue; tgt = DATUM(db->val_to_type[t]); rc = __cil_avrule_expand(pdb, kind, src, tgt, classperms, cond_node, cond_flavor); if (rc != SEPOL_OK) { ebitmap_destroy(&src_bitmap); ebitmap_destroy(&tgt_bitmap); goto exit; } } } ebitmap_destroy(&src_bitmap); ebitmap_destroy(&tgt_bitmap); } else if (expand_src) { rc = __cil_expand_type(src, &src_bitmap); if (rc != SEPOL_OK) { goto exit; } ebitmap_for_each_bit(&src_bitmap, snode, s) { if (!ebitmap_get_bit(&src_bitmap, s)) continue; src = DATUM(db->val_to_type[s]); rc = __cil_avrule_expand(pdb, kind, src, tgt, classperms, cond_node, cond_flavor); if (rc != SEPOL_OK) { ebitmap_destroy(&src_bitmap); goto exit; } } ebitmap_destroy(&src_bitmap); } else { /* expand_tgt */ rc = __cil_expand_type(tgt, &tgt_bitmap); if (rc != SEPOL_OK) { goto exit; } ebitmap_for_each_bit(&tgt_bitmap, tnode, t) { if (!ebitmap_get_bit(&tgt_bitmap, t)) continue; tgt = DATUM(db->val_to_type[t]); rc = __cil_avrule_expand(pdb, kind, src, tgt, classperms, cond_node, cond_flavor); if (rc != SEPOL_OK) { ebitmap_destroy(&tgt_bitmap); goto exit; } } ebitmap_destroy(&tgt_bitmap); } } return SEPOL_OK; exit: return rc; } int cil_avrule_to_policydb(policydb_t *pdb, const struct cil_db *db, struct cil_avrule *cil_avrule) { return __cil_avrule_to_avtab(pdb, db, cil_avrule, NULL, CIL_FALSE); } // Copied from checkpolicy/policy_define.c /* index of the u32 containing the permission */ #define XPERM_IDX(x) (x >> 5) /* set bits 0 through x-1 within the u32 */ #define XPERM_SETBITS(x) ((1 << (x & 0x1f)) - 1) /* low value for this u32 */ #define XPERM_LOW(x) (x << 5) /* high value for this u32 */ #define XPERM_HIGH(x) (((x + 1) << 5) - 1) void __avrule_xperm_setrangebits(uint16_t low, uint16_t high, struct avtab_extended_perms *xperms) { unsigned int i; uint16_t h = high + 1; /* for each u32 that this low-high range touches, set driver permissions */ for (i = XPERM_IDX(low); i <= XPERM_IDX(high); i++) { /* set all bits in u32 */ if ((low <= XPERM_LOW(i)) && (high >= XPERM_HIGH(i))) xperms->perms[i] |= ~0U; /* set low bits */ else if ((low <= XPERM_LOW(i)) && (high < XPERM_HIGH(i))) xperms->perms[i] |= XPERM_SETBITS(h); /* set high bits */ else if ((low > XPERM_LOW(i)) && (high >= XPERM_HIGH(i))) xperms->perms[i] |= ~0U - XPERM_SETBITS(low); /* set middle bits */ else if ((low > XPERM_LOW(i)) && (high <= XPERM_HIGH(i))) xperms->perms[i] |= XPERM_SETBITS(h) - XPERM_SETBITS(low); } } #define IOC_DRIV(x) (x >> 8) #define IOC_FUNC(x) (x & 0xff) int __cil_permx_bitmap_to_sepol_xperms_list(ebitmap_t *xperms, struct cil_list **xperms_list) { ebitmap_node_t *node; unsigned int i; uint16_t low = 0, high = 0; struct avtab_extended_perms *partial = NULL; struct avtab_extended_perms *complete = NULL; int start_new_range; cil_list_init(xperms_list, CIL_NONE); start_new_range = 1; ebitmap_for_each_bit(xperms, node, i) { if (!ebitmap_get_bit(xperms, i)) continue; if (start_new_range) { low = i; start_new_range = 0; } // continue if the current bit isn't the end of the driver function or the next bit is set if (IOC_FUNC(i) != 0xff && ebitmap_get_bit(xperms, i + 1)) { continue; } // if we got here, i is the end of this range (either becuase the func // is 0xff or the next bit isn't set). The next time around we are // going to need a start a new range high = i; start_new_range = 1; if (IOC_FUNC(low) == 0x00 && IOC_FUNC(high) == 0xff) { if (!complete) { complete = cil_calloc(1, sizeof(*complete)); complete->driver = 0x0; complete->specified = AVTAB_XPERMS_IOCTLDRIVER; } __avrule_xperm_setrangebits(IOC_DRIV(low), IOC_DRIV(low), complete); } else { if (partial && partial->driver != IOC_DRIV(low)) { cil_list_append(*xperms_list, CIL_NONE, partial); partial = NULL; } if (!partial) { partial = cil_calloc(1, sizeof(*partial)); partial->driver = IOC_DRIV(low); partial->specified = AVTAB_XPERMS_IOCTLFUNCTION; } __avrule_xperm_setrangebits(IOC_FUNC(low), IOC_FUNC(high), partial); } } if (partial) { cil_list_append(*xperms_list, CIL_NONE, partial); } if (complete) { cil_list_append(*xperms_list, CIL_NONE, complete); } return SEPOL_OK; } int __cil_avrulex_ioctl_to_policydb(hashtab_key_t k, hashtab_datum_t datum, void *args) { int rc = SEPOL_OK; struct policydb *pdb; avtab_key_t *avtab_key; avtab_datum_t avtab_datum; struct cil_list *xperms_list = NULL; struct cil_list_item *item; class_datum_t *sepol_obj; uint32_t data = 0; avtab_key = (avtab_key_t *)k; pdb = args; sepol_obj = pdb->class_val_to_struct[avtab_key->target_class - 1]; // setting the data for an extended avtab isn't really neccessary because // it is ignored by the kernel. However, neverallow checking requires that // the data value be set, so set it for that to work. rc = __perm_str_to_datum(CIL_KEY_IOCTL, sepol_obj, &data); if (rc != SEPOL_OK) { goto exit; } avtab_datum.data = data; rc = __cil_permx_bitmap_to_sepol_xperms_list(datum, &xperms_list); if (rc != SEPOL_OK) { goto exit; } cil_list_for_each(item, xperms_list) { avtab_datum.xperms = item->data; rc = avtab_insert(&pdb->te_avtab, avtab_key, &avtab_datum); if (rc != SEPOL_OK) { goto exit; } } rc = SEPOL_OK; exit: if (xperms_list != NULL) { cil_list_for_each(item, xperms_list) { free(item->data); } cil_list_destroy(&xperms_list, CIL_FALSE); } // hashtab_t does not have a way to free keys or datum since it doesn't // know what they are. We won't need the keys/datum after this function, so // clean them up here. free(avtab_key); ebitmap_destroy(datum); free(datum); return rc; } int __cil_avrulex_ioctl_to_hashtable(hashtab_t h, uint16_t kind, uint32_t src, uint32_t tgt, uint32_t obj, ebitmap_t *xperms) { uint16_t specified; avtab_key_t *avtab_key; ebitmap_t *hashtab_xperms; int rc = SEPOL_ERR; switch (kind) { case CIL_AVRULE_ALLOWED: specified = AVTAB_XPERMS_ALLOWED; break; case CIL_AVRULE_AUDITALLOW: specified = AVTAB_XPERMS_AUDITALLOW; break; case CIL_AVRULE_DONTAUDIT: specified = AVTAB_XPERMS_DONTAUDIT; break; default: rc = SEPOL_ERR; goto exit; } avtab_key = cil_malloc(sizeof(*avtab_key)); avtab_key->source_type = src; avtab_key->target_type = tgt; avtab_key->target_class = obj; avtab_key->specified = specified; hashtab_xperms = (ebitmap_t *)hashtab_search(h, (hashtab_key_t)avtab_key); if (!hashtab_xperms) { hashtab_xperms = cil_malloc(sizeof(*hashtab_xperms)); rc = ebitmap_cpy(hashtab_xperms, xperms); if (rc != SEPOL_OK) { free(hashtab_xperms); free(avtab_key); goto exit; } rc = hashtab_insert(h, (hashtab_key_t)avtab_key, hashtab_xperms); if (rc != SEPOL_OK) { free(hashtab_xperms); free(avtab_key); goto exit; } } else { free(avtab_key); rc = ebitmap_union(hashtab_xperms, xperms); if (rc != SEPOL_OK) { goto exit; } } return SEPOL_OK; exit: return rc; } int __cil_avrulex_to_hashtable_helper(policydb_t *pdb, uint16_t kind, struct cil_symtab_datum *src, struct cil_symtab_datum *tgt, struct cil_permissionx *permx, struct cil_args_binary *args) { int rc = SEPOL_ERR; type_datum_t *sepol_src = NULL; type_datum_t *sepol_tgt = NULL; class_datum_t *sepol_obj = NULL; struct cil_list *class_list = NULL; struct cil_list_item *c; rc = __cil_get_sepol_type_datum(pdb, src, &sepol_src); if (rc != SEPOL_OK) goto exit; rc = __cil_get_sepol_type_datum(pdb, tgt, &sepol_tgt); if (rc != SEPOL_OK) goto exit; class_list = cil_expand_class(permx->obj); cil_list_for_each(c, class_list) { rc = __cil_get_sepol_class_datum(pdb, DATUM(c->data), &sepol_obj); if (rc != SEPOL_OK) goto exit; switch (permx->kind) { case CIL_PERMX_KIND_IOCTL: rc = __cil_avrulex_ioctl_to_hashtable(args->avrulex_ioctl_table, kind, sepol_src->s.value, sepol_tgt->s.value, sepol_obj->s.value, permx->perms); if (rc != SEPOL_OK) goto exit; break; default: rc = SEPOL_ERR; goto exit; } } rc = SEPOL_OK; exit: cil_list_destroy(&class_list, CIL_FALSE); return rc; } int cil_avrulex_to_hashtable(policydb_t *pdb, const struct cil_db *db, struct cil_avrule *cil_avrulex, struct cil_args_binary *args) { int rc = SEPOL_ERR; uint16_t kind; struct cil_symtab_datum *src = NULL; struct cil_symtab_datum *tgt = NULL; ebitmap_t src_bitmap, tgt_bitmap; ebitmap_node_t *snode, *tnode; unsigned int s,t; if (cil_avrulex->rule_kind == CIL_AVRULE_DONTAUDIT && db->disable_dontaudit == CIL_TRUE) { // Do not add dontaudit rules to binary rc = SEPOL_OK; goto exit; } kind = cil_avrulex->rule_kind; src = cil_avrulex->src; tgt = cil_avrulex->tgt; if (tgt->fqn == CIL_KEY_SELF) { rc = __cil_expand_type(src, &src_bitmap); if (rc != SEPOL_OK) goto exit; ebitmap_for_each_bit(&src_bitmap, snode, s) { if (!ebitmap_get_bit(&src_bitmap, s)) continue; src = DATUM(db->val_to_type[s]); rc = __cil_avrulex_to_hashtable_helper(pdb, kind, src, src, cil_avrulex->perms.x.permx, args); if (rc != SEPOL_OK) { goto exit; } } ebitmap_destroy(&src_bitmap); } else { int expand_src = __cil_should_expand_attribute(db, src); int expand_tgt = __cil_should_expand_attribute(db, tgt); if (!expand_src && !expand_tgt) { rc = __cil_avrulex_to_hashtable_helper(pdb, kind, src, tgt, cil_avrulex->perms.x.permx, args); if (rc != SEPOL_OK) { goto exit; } } else if (expand_src && expand_tgt) { rc = __cil_expand_type(src, &src_bitmap); if (rc != SEPOL_OK) { goto exit; } rc = __cil_expand_type(tgt, &tgt_bitmap); if (rc != SEPOL_OK) { ebitmap_destroy(&src_bitmap); goto exit; } ebitmap_for_each_bit(&src_bitmap, snode, s) { if (!ebitmap_get_bit(&src_bitmap, s)) continue; src = DATUM(db->val_to_type[s]); ebitmap_for_each_bit(&tgt_bitmap, tnode, t) { if (!ebitmap_get_bit(&tgt_bitmap, t)) continue; tgt = DATUM(db->val_to_type[t]); rc = __cil_avrulex_to_hashtable_helper(pdb, kind, src, tgt, cil_avrulex->perms.x.permx, args); if (rc != SEPOL_OK) { ebitmap_destroy(&src_bitmap); ebitmap_destroy(&tgt_bitmap); goto exit; } } } ebitmap_destroy(&src_bitmap); ebitmap_destroy(&tgt_bitmap); } else if (expand_src) { rc = __cil_expand_type(src, &src_bitmap); if (rc != SEPOL_OK) { goto exit; } ebitmap_for_each_bit(&src_bitmap, snode, s) { if (!ebitmap_get_bit(&src_bitmap, s)) continue; src = DATUM(db->val_to_type[s]); rc = __cil_avrulex_to_hashtable_helper(pdb, kind, src, tgt, cil_avrulex->perms.x.permx, args); if (rc != SEPOL_OK) { ebitmap_destroy(&src_bitmap); goto exit; } } ebitmap_destroy(&src_bitmap); } else { /* expand_tgt */ rc = __cil_expand_type(tgt, &tgt_bitmap); if (rc != SEPOL_OK) { goto exit; } ebitmap_for_each_bit(&tgt_bitmap, tnode, t) { if (!ebitmap_get_bit(&tgt_bitmap, t)) continue; tgt = DATUM(db->val_to_type[t]); rc = __cil_avrulex_to_hashtable_helper(pdb, kind, src, tgt, cil_avrulex->perms.x.permx, args); if (rc != SEPOL_OK) { ebitmap_destroy(&tgt_bitmap); goto exit; } } ebitmap_destroy(&tgt_bitmap); } } return SEPOL_OK; exit: return rc; } int __cil_cond_to_policydb_helper(struct cil_tree_node *node, __attribute__((unused)) uint32_t *finished, void *extra_args) { int rc; enum cil_flavor flavor; struct cil_args_booleanif *args = extra_args; const struct cil_db *db = args->db; policydb_t *pdb = args->pdb; cond_node_t *cond_node = args->cond_node; enum cil_flavor cond_flavor = args->cond_flavor; struct cil_type_rule *cil_type_rule; struct cil_avrule *cil_avrule; struct cil_nametypetransition *cil_typetrans; hashtab_t filename_trans_table = args->filename_trans_table; flavor = node->flavor; switch (flavor) { case CIL_NAMETYPETRANSITION: cil_typetrans = (struct cil_nametypetransition*)node->data; if (DATUM(cil_typetrans->name)->fqn != CIL_KEY_STAR) { cil_log(CIL_ERR, "typetransition with file name not allowed within a booleanif block.\n"); cil_tree_log(node, CIL_ERR,"Invalid typetransition statement"); goto exit; } rc = __cil_typetransition_to_avtab(pdb, db, cil_typetrans, cond_node, cond_flavor, filename_trans_table); if (rc != SEPOL_OK) { cil_tree_log(node, CIL_ERR, "Failed to insert type transition into avtab"); goto exit; } break; case CIL_TYPE_RULE: cil_type_rule = node->data; rc = __cil_type_rule_to_avtab(pdb, db, cil_type_rule, cond_node, cond_flavor); if (rc != SEPOL_OK) { cil_tree_log(node, CIL_ERR, "Failed to insert typerule into avtab"); goto exit; } break; case CIL_AVRULE: cil_avrule = node->data; rc = __cil_avrule_to_avtab(pdb, db, cil_avrule, cond_node, cond_flavor); if (rc != SEPOL_OK) { cil_tree_log(node, CIL_ERR, "Failed to insert avrule into avtab"); goto exit; } break; case CIL_CALL: case CIL_TUNABLEIF: break; default: cil_tree_log(node, CIL_ERR, "Invalid statement within booleanif"); goto exit; } return SEPOL_OK; exit: return SEPOL_ERR; } static void __cil_expr_to_string(struct cil_list *expr, enum cil_flavor flavor, char **out); static void __cil_expr_to_string_helper(struct cil_list_item *curr, enum cil_flavor flavor, char **out) { char *c; if (curr->flavor == CIL_DATUM) { *out = cil_strdup(DATUM(curr->data)->fqn); } else if (curr->flavor == CIL_LIST) { __cil_expr_to_string(curr->data, flavor, &c); cil_asprintf(out, "(%s)", c); free(c); } else if (flavor == CIL_PERMISSIONX) { // permissionx expressions aren't resolved into anything, so curr->flavor // is just a CIL_STRING, not a CIL_DATUM, so just check on flavor for those *out = cil_strdup(curr->data); } } static void __cil_expr_to_string(struct cil_list *expr, enum cil_flavor flavor, char **out) { struct cil_list_item *curr; char *s1 = NULL; char *s2 = NULL; enum cil_flavor op; if (expr == NULL || expr->head == NULL) { *out = cil_strdup(""); return; } curr = expr->head; if (curr->flavor == CIL_OP) { op = (enum cil_flavor)curr->data; if (op == CIL_ALL) { *out = cil_strdup(CIL_KEY_ALL); } else if (op == CIL_RANGE) { __cil_expr_to_string_helper(curr->next, flavor, &s1); __cil_expr_to_string_helper(curr->next->next, flavor, &s2); cil_asprintf(out, "%s %s %s", CIL_KEY_RANGE, s1, s2); free(s1); free(s2); } else { __cil_expr_to_string_helper(curr->next, flavor, &s1); if (op == CIL_NOT) { cil_asprintf(out, "%s %s", CIL_KEY_NOT, s1); free(s1); } else { const char *opstr = ""; __cil_expr_to_string_helper(curr->next->next, flavor, &s2); if (op == CIL_OR) { opstr = CIL_KEY_OR; } else if (op == CIL_AND) { opstr = CIL_KEY_AND; } else if (op == CIL_XOR) { opstr = CIL_KEY_XOR; } cil_asprintf(out, "%s %s %s", opstr, s1, s2); free(s1); free(s2); } } } else { char *c1 = NULL; char *c2 = NULL; __cil_expr_to_string_helper(curr, flavor, &c1); for (curr = curr->next; curr; curr = curr->next) { s1 = NULL; __cil_expr_to_string_helper(curr, flavor, &s1); cil_asprintf(&c2, "%s %s", c1, s1); free(c1); free(s1); c1 = c2; } *out = c1; } } static int __cil_cond_expr_to_sepol_expr_helper(policydb_t *pdb, struct cil_list *cil_expr, cond_expr_t **head, cond_expr_t **tail); static int __cil_cond_item_to_sepol_expr(policydb_t *pdb, struct cil_list_item *item, cond_expr_t **head, cond_expr_t **tail) { if (item == NULL) { goto exit; } else if (item->flavor == CIL_DATUM) { char *key = DATUM(item->data)->fqn; cond_bool_datum_t *sepol_bool = hashtab_search(pdb->p_bools.table, key); if (sepol_bool == NULL) { cil_log(CIL_INFO, "Failed to find boolean\n"); goto exit; } *head = cil_malloc(sizeof(cond_expr_t)); (*head)->next = NULL; (*head)->expr_type = COND_BOOL; (*head)->bool = sepol_bool->s.value; *tail = *head; } else if (item->flavor == CIL_LIST) { struct cil_list *l = item->data; int rc = __cil_cond_expr_to_sepol_expr_helper(pdb, l, head, tail); if (rc != SEPOL_OK) { goto exit; } } else { goto exit; } return SEPOL_OK; exit: return SEPOL_ERR; } static int __cil_cond_expr_to_sepol_expr_helper(policydb_t *pdb, struct cil_list *cil_expr, cond_expr_t **head, cond_expr_t **tail) { int rc = SEPOL_ERR; struct cil_list_item *item = cil_expr->head; enum cil_flavor flavor = cil_expr->flavor; cond_expr_t *op, *h1, *h2, *t1, *t2; if (flavor != CIL_BOOL) { cil_log(CIL_INFO, "Expected boolean expression\n"); goto exit; } if (item == NULL) { goto exit; } else if (item->flavor == CIL_OP) { enum cil_flavor cil_op = (enum cil_flavor)item->data; op = cil_malloc(sizeof(*op)); op->bool = 0; op->next = NULL; switch (cil_op) { case CIL_NOT: op->expr_type = COND_NOT; break; case CIL_OR: op->expr_type = COND_OR; break; case CIL_AND: op->expr_type = COND_AND; break; case CIL_XOR: op->expr_type = COND_XOR; break; case CIL_EQ: op->expr_type = COND_EQ; break; case CIL_NEQ: op->expr_type = COND_NEQ; break; default: free(op); goto exit; } rc = __cil_cond_item_to_sepol_expr(pdb, item->next, &h1, &t1); if (rc != SEPOL_OK) { cil_log(CIL_INFO, "Failed to get first operand of conditional expression\n"); free(op); goto exit; } if (cil_op == CIL_NOT) { *head = h1; t1->next = op; *tail = op; } else { rc = __cil_cond_item_to_sepol_expr(pdb, item->next->next, &h2, &t2); if (rc != SEPOL_OK) { cil_log(CIL_INFO, "Failed to get second operand of conditional expression\n"); free(op); cond_expr_destroy(h1); goto exit; } *head = h1; t1->next = h2; t2->next = op; *tail = op; } } else { rc = __cil_cond_item_to_sepol_expr(pdb, item, &h1, &t1); if (rc != SEPOL_OK) { cil_log(CIL_INFO, "Failed to get initial item in conditional list\n"); goto exit; } *head = h1; for (item = item->next; item; item = item->next) { rc = __cil_cond_item_to_sepol_expr(pdb, item, &h2, &t2); if (rc != SEPOL_OK) { cil_log(CIL_INFO, "Failed to get item in conditional list\n"); cond_expr_destroy(*head); goto exit; } op = cil_malloc(sizeof(*op)); op->bool = 0; op->next = NULL; op->expr_type = COND_OR; t1->next = h2; t2->next = op; t1 = op; } *tail = t1; } return SEPOL_OK; exit: return SEPOL_ERR; } static int __cil_cond_expr_to_sepol_expr(policydb_t *pdb, struct cil_list *cil_expr, cond_expr_t **sepol_expr) { int rc; cond_expr_t *head, *tail; rc = __cil_cond_expr_to_sepol_expr_helper(pdb, cil_expr, &head, &tail); if (rc != SEPOL_OK) { return SEPOL_ERR; } *sepol_expr = head; return SEPOL_OK; } int cil_booleanif_to_policydb(policydb_t *pdb, const struct cil_db *db, struct cil_tree_node *node, hashtab_t filename_trans_table) { int rc = SEPOL_ERR; struct cil_args_booleanif bool_args; struct cil_booleanif *cil_boolif = (struct cil_booleanif*)node->data; struct cil_tree_node *cb_node = node->cl_head; struct cil_tree_node *true_node = NULL; struct cil_tree_node *false_node = NULL; struct cil_tree_node *tmp_node = NULL; cond_node_t *tmp_cond = NULL; cond_node_t *cond_node = NULL; int was_created; int swapped = CIL_FALSE; cond_av_list_t tmp_cl; tmp_cond = cond_node_create(pdb, NULL); if (tmp_cond == NULL) { rc = SEPOL_ERR; cil_tree_log(node, CIL_INFO, "Failed to create sepol conditional node"); goto exit; } rc = __cil_cond_expr_to_sepol_expr(pdb, cil_boolif->datum_expr, &tmp_cond->expr); if (rc != SEPOL_OK) { cil_tree_log(node, CIL_INFO, "Failed to convert CIL conditional expression to sepol expression"); goto exit; } tmp_cond->true_list = &tmp_cl; rc = cond_normalize_expr(pdb, tmp_cond); if (rc != SEPOL_OK) { goto exit; } if (tmp_cond->false_list != NULL) { tmp_cond->true_list = NULL; swapped = CIL_TRUE; } cond_node = cond_node_find(pdb, tmp_cond, pdb->cond_list, &was_created); if (cond_node == NULL) { rc = SEPOL_ERR; goto exit; } if (was_created) { cond_node->next = pdb->cond_list; pdb->cond_list = cond_node; } cond_expr_destroy(tmp_cond->expr); free(tmp_cond); tmp_cond = NULL; for (cb_node = node->cl_head; cb_node != NULL; cb_node = cb_node->next) { if (cb_node->flavor == CIL_CONDBLOCK) { struct cil_condblock *cb = cb_node->data; if (cb->flavor == CIL_CONDTRUE) { true_node = cb_node; } else if (cb->flavor == CIL_CONDFALSE) { false_node = cb_node; } } } if (swapped) { tmp_node = true_node; true_node = false_node; false_node = tmp_node; } bool_args.db = db; bool_args.pdb = pdb; bool_args.cond_node = cond_node; bool_args.filename_trans_table = filename_trans_table; if (true_node != NULL) { bool_args.cond_flavor = CIL_CONDTRUE; rc = cil_tree_walk(true_node, __cil_cond_to_policydb_helper, NULL, NULL, &bool_args); if (rc != SEPOL_OK) { cil_tree_log(true_node, CIL_ERR, "Failure while walking true conditional block"); goto exit; } } if (false_node != NULL) { bool_args.cond_flavor = CIL_CONDFALSE; rc = cil_tree_walk(false_node, __cil_cond_to_policydb_helper, NULL, NULL, &bool_args); if (rc != SEPOL_OK) { cil_tree_log(false_node, CIL_ERR, "Failure while walking false conditional block"); goto exit; } } return SEPOL_OK; exit: if (tmp_cond) { if (tmp_cond->expr) cond_expr_destroy(tmp_cond->expr); free(tmp_cond); } return rc; } int cil_roletrans_to_policydb(policydb_t *pdb, const struct cil_db *db, struct cil_roletransition *roletrans, hashtab_t role_trans_table) { int rc = SEPOL_ERR; role_datum_t *sepol_src = NULL; type_datum_t *sepol_tgt = NULL; class_datum_t *sepol_obj = NULL; struct cil_list *class_list; role_datum_t *sepol_result = NULL; role_trans_t *new = NULL; uint32_t *new_role = NULL; ebitmap_t role_bitmap, type_bitmap; ebitmap_node_t *rnode, *tnode; unsigned int i, j; struct cil_list_item *c; rc = __cil_expand_role(DATUM(roletrans->src), &role_bitmap); if (rc != SEPOL_OK) goto exit; rc = __cil_expand_type(roletrans->tgt, &type_bitmap); if (rc != SEPOL_OK) goto exit; class_list = cil_expand_class(roletrans->obj); rc = __cil_get_sepol_role_datum(pdb, DATUM(roletrans->result), &sepol_result); if (rc != SEPOL_OK) goto exit; ebitmap_for_each_bit(&role_bitmap, rnode, i) { if (!ebitmap_get_bit(&role_bitmap, i)) continue; rc = __cil_get_sepol_role_datum(pdb, DATUM(db->val_to_role[i]), &sepol_src); if (rc != SEPOL_OK) goto exit; ebitmap_for_each_bit(&type_bitmap, tnode, j) { if (!ebitmap_get_bit(&type_bitmap, j)) continue; rc = __cil_get_sepol_type_datum(pdb, DATUM(db->val_to_type[j]), &sepol_tgt); if (rc != SEPOL_OK) goto exit; cil_list_for_each(c, class_list) { int add = CIL_TRUE; rc = __cil_get_sepol_class_datum(pdb, DATUM(c->data), &sepol_obj); if (rc != SEPOL_OK) goto exit; new = cil_malloc(sizeof(*new)); memset(new, 0, sizeof(*new)); new->role = sepol_src->s.value; new->type = sepol_tgt->s.value; new->tclass = sepol_obj->s.value; new->new_role = sepol_result->s.value; rc = hashtab_insert(role_trans_table, (hashtab_key_t)new, &(new->new_role)); if (rc != SEPOL_OK) { if (rc == SEPOL_EEXIST) { add = CIL_FALSE; new_role = hashtab_search(role_trans_table, (hashtab_key_t)new); if (new->new_role != *new_role) { cil_log(CIL_ERR, "Conflicting role transition rules\n"); } else { rc = SEPOL_OK; } } else { cil_log(CIL_ERR, "Out of memory\n"); } } if (add == CIL_TRUE) { new->next = pdb->role_tr; pdb->role_tr = new; } else { free(new); if (rc != SEPOL_OK) { goto exit; } } } } } rc = SEPOL_OK; exit: ebitmap_destroy(&role_bitmap); ebitmap_destroy(&type_bitmap); cil_list_destroy(&class_list, CIL_FALSE); return rc; } int cil_roleallow_to_policydb(policydb_t *pdb, const struct cil_db *db, struct cil_roleallow *roleallow) { int rc = SEPOL_ERR; role_datum_t *sepol_src = NULL; role_datum_t *sepol_tgt = NULL; role_allow_t *sepol_roleallow = NULL; ebitmap_t src_bitmap, tgt_bitmap; ebitmap_node_t *node1, *node2; unsigned int i, j; rc = __cil_expand_role(roleallow->src, &src_bitmap); if (rc != SEPOL_OK) goto exit; rc = __cil_expand_role(roleallow->tgt, &tgt_bitmap); if (rc != SEPOL_OK) goto exit; ebitmap_for_each_bit(&src_bitmap, node1, i) { if (!ebitmap_get_bit(&src_bitmap, i)) continue; rc = __cil_get_sepol_role_datum(pdb, DATUM(db->val_to_role[i]), &sepol_src); if (rc != SEPOL_OK) goto exit; ebitmap_for_each_bit(&tgt_bitmap, node2, j) { if (!ebitmap_get_bit(&tgt_bitmap, j)) continue; rc = __cil_get_sepol_role_datum(pdb, DATUM(db->val_to_role[j]), &sepol_tgt); if (rc != SEPOL_OK) goto exit; sepol_roleallow = cil_malloc(sizeof(*sepol_roleallow)); memset(sepol_roleallow, 0, sizeof(role_allow_t)); sepol_roleallow->role = sepol_src->s.value; sepol_roleallow->new_role = sepol_tgt->s.value; sepol_roleallow->next = pdb->role_allow; pdb->role_allow = sepol_roleallow; } } rc = SEPOL_OK; exit: ebitmap_destroy(&src_bitmap); ebitmap_destroy(&tgt_bitmap); return rc; } int __cil_constrain_expr_datum_to_sepol_expr(policydb_t *pdb, const struct cil_db *db, struct cil_list_item *item, enum cil_flavor expr_flavor, constraint_expr_t *expr) { int rc = SEPOL_ERR; if (expr_flavor == CIL_USER) { user_datum_t *sepol_user = NULL; ebitmap_t user_bitmap; ebitmap_node_t *unode; unsigned int i; rc = __cil_expand_user(item->data, &user_bitmap); if (rc != SEPOL_OK) goto exit; ebitmap_for_each_bit(&user_bitmap, unode, i) { if (!ebitmap_get_bit(&user_bitmap, i)) { continue; } rc = __cil_get_sepol_user_datum(pdb, DATUM(db->val_to_user[i]), &sepol_user); if (rc != SEPOL_OK) { ebitmap_destroy(&user_bitmap); goto exit; } if (ebitmap_set_bit(&expr->names, sepol_user->s.value - 1, 1)) { ebitmap_destroy(&user_bitmap); goto exit; } } ebitmap_destroy(&user_bitmap); } else if (expr_flavor == CIL_ROLE) { role_datum_t *sepol_role = NULL; ebitmap_t role_bitmap; ebitmap_node_t *rnode; unsigned int i; rc = __cil_expand_role(item->data, &role_bitmap); if (rc != SEPOL_OK) goto exit; ebitmap_for_each_bit(&role_bitmap, rnode, i) { if (!ebitmap_get_bit(&role_bitmap, i)) continue; rc = __cil_get_sepol_role_datum(pdb, DATUM(db->val_to_role[i]), &sepol_role); if (rc != SEPOL_OK) { ebitmap_destroy(&role_bitmap); goto exit; } if (ebitmap_set_bit(&expr->names, sepol_role->s.value - 1, 1)) { ebitmap_destroy(&role_bitmap); goto exit; } } ebitmap_destroy(&role_bitmap); } else if (expr_flavor == CIL_TYPE) { type_datum_t *sepol_type = NULL; ebitmap_t type_bitmap; ebitmap_node_t *tnode; unsigned int i; if (pdb->policyvers >= POLICYDB_VERSION_CONSTRAINT_NAMES) { rc = __cil_get_sepol_type_datum(pdb, item->data, &sepol_type); if (rc != SEPOL_OK) { if (FLAVOR(item->data) == CIL_TYPEATTRIBUTE) { struct cil_typeattribute *attr = item->data; if (!attr->keep) { rc = 0; } } } if (sepol_type) { rc = ebitmap_set_bit(&expr->type_names->types, sepol_type->s.value - 1, 1); } if (rc != SEPOL_OK) { goto exit; } } rc = __cil_expand_type(item->data, &type_bitmap); if (rc != SEPOL_OK) goto exit; ebitmap_for_each_bit(&type_bitmap, tnode, i) { if (!ebitmap_get_bit(&type_bitmap, i)) continue; rc = __cil_get_sepol_type_datum(pdb, DATUM(db->val_to_type[i]), &sepol_type); if (rc != SEPOL_OK) { ebitmap_destroy(&type_bitmap); goto exit; } if (ebitmap_set_bit(&expr->names, sepol_type->s.value - 1, 1)) { ebitmap_destroy(&type_bitmap); goto exit; } } ebitmap_destroy(&type_bitmap); } else { goto exit; } return SEPOL_OK; exit: return SEPOL_ERR; } int __cil_constrain_expr_leaf_to_sepol_expr(policydb_t *pdb, const struct cil_db *db, struct cil_list_item *op_item, enum cil_flavor expr_flavor, constraint_expr_t *expr) { int rc = SEPOL_ERR; struct cil_list_item *l_item = op_item->next; struct cil_list_item *r_item = op_item->next->next; enum cil_flavor l_operand = (enum cil_flavor)l_item->data; switch (l_operand) { case CIL_CONS_U1: expr->attr = CEXPR_USER; break; case CIL_CONS_U2: expr->attr = CEXPR_USER | CEXPR_TARGET; break; case CIL_CONS_U3: expr->attr = CEXPR_USER | CEXPR_XTARGET; break; case CIL_CONS_R1: expr->attr = CEXPR_ROLE; break; case CIL_CONS_R2: expr->attr = CEXPR_ROLE | CEXPR_TARGET; break; case CIL_CONS_R3: expr->attr = CEXPR_ROLE | CEXPR_XTARGET; break; case CIL_CONS_T1: expr->attr = CEXPR_TYPE; break; case CIL_CONS_T2: expr->attr = CEXPR_TYPE | CEXPR_TARGET; break; case CIL_CONS_T3: expr->attr = CEXPR_TYPE | CEXPR_XTARGET; break; case CIL_CONS_L1: { enum cil_flavor r_operand = (enum cil_flavor)r_item->data; if (r_operand == CIL_CONS_L2) { expr->attr = CEXPR_L1L2; } else if (r_operand == CIL_CONS_H1) { expr->attr = CEXPR_L1H1; } else { expr->attr = CEXPR_L1H2; } break; } case CIL_CONS_L2: expr->attr = CEXPR_L2H2; break; case CIL_CONS_H1: { enum cil_flavor r_operand = (enum cil_flavor)r_item->data; if (r_operand == CIL_CONS_L2) { expr->attr = CEXPR_H1L2; } else { expr->attr = CEXPR_H1H2; } break; } default: goto exit; break; } if (r_item->flavor == CIL_CONS_OPERAND) { expr->expr_type = CEXPR_ATTR; } else { expr->expr_type = CEXPR_NAMES; if (r_item->flavor == CIL_DATUM) { rc = __cil_constrain_expr_datum_to_sepol_expr(pdb, db, r_item, expr_flavor, expr); if (rc != SEPOL_OK) { goto exit; } } else if (r_item->flavor == CIL_LIST) { struct cil_list *r_expr = r_item->data; struct cil_list_item *curr; cil_list_for_each(curr, r_expr) { rc = __cil_constrain_expr_datum_to_sepol_expr(pdb, db, curr, expr_flavor, expr); if (rc != SEPOL_OK) { goto exit; } } } else { rc = SEPOL_ERR; goto exit; } } return SEPOL_OK; exit: return rc; } int __cil_constrain_expr_to_sepol_expr_helper(policydb_t *pdb, const struct cil_db *db, const struct cil_list *cil_expr, constraint_expr_t **head, constraint_expr_t **tail) { int rc = SEPOL_ERR; struct cil_list_item *item; enum cil_flavor flavor; constraint_expr_t *op, *h1, *h2, *t1, *t2; int is_leaf = CIL_FALSE; if (cil_expr == NULL) { return SEPOL_ERR; } item = cil_expr->head; flavor = cil_expr->flavor; op = cil_malloc(sizeof(constraint_expr_t)); rc = constraint_expr_init(op); if (rc != SEPOL_OK) { goto exit; } enum cil_flavor cil_op = (enum cil_flavor)item->data; switch (cil_op) { case CIL_NOT: op->expr_type = CEXPR_NOT; break; case CIL_AND: op->expr_type = CEXPR_AND; break; case CIL_OR: op->expr_type = CEXPR_OR; break; case CIL_EQ: op->op = CEXPR_EQ; is_leaf = CIL_TRUE; break; case CIL_NEQ: op->op = CEXPR_NEQ; is_leaf = CIL_TRUE; break; case CIL_CONS_DOM: op->op = CEXPR_DOM; is_leaf = CIL_TRUE; break; case CIL_CONS_DOMBY: op->op = CEXPR_DOMBY; is_leaf = CIL_TRUE; break; case CIL_CONS_INCOMP: op->op = CEXPR_INCOMP; is_leaf = CIL_TRUE; break; default: goto exit; } if (is_leaf == CIL_TRUE) { rc = __cil_constrain_expr_leaf_to_sepol_expr(pdb, db, item, flavor, op); if (rc != SEPOL_OK) { goto exit; } *head = op; *tail = op; } else if (cil_op == CIL_NOT) { struct cil_list *l_expr = item->next->data; rc = __cil_constrain_expr_to_sepol_expr_helper(pdb, db, l_expr, &h1, &t1); if (rc != SEPOL_OK) { goto exit; } t1->next = op; *head = h1; *tail = op; } else { struct cil_list *l_expr = item->next->data; struct cil_list *r_expr = item->next->next->data; rc = __cil_constrain_expr_to_sepol_expr_helper(pdb, db, l_expr, &h1, &t1); if (rc != SEPOL_OK) { goto exit; } rc = __cil_constrain_expr_to_sepol_expr_helper(pdb, db, r_expr, &h2, &t2); if (rc != SEPOL_OK) { constraint_expr_destroy(h1); goto exit; } t1->next = h2; t2->next = op; *head = h1; *tail = op; } return SEPOL_OK; exit: constraint_expr_destroy(op); return SEPOL_ERR; } int __cil_constrain_expr_to_sepol_expr(policydb_t *pdb, const struct cil_db *db, const struct cil_list *cil_expr, constraint_expr_t **sepol_expr) { int rc; constraint_expr_t *head, *tail; rc = __cil_constrain_expr_to_sepol_expr_helper(pdb, db, cil_expr, &head, &tail); if (rc != SEPOL_OK) { return SEPOL_ERR; } *sepol_expr = head; return SEPOL_OK; } int cil_constrain_to_policydb_helper(policydb_t *pdb, const struct cil_db *db, struct cil_symtab_datum *class, struct cil_list *perms, struct cil_list *expr) { int rc = SEPOL_ERR; constraint_node_t *sepol_constrain = NULL; constraint_expr_t *sepol_expr = NULL; class_datum_t *sepol_class = NULL; sepol_constrain = cil_malloc(sizeof(*sepol_constrain)); memset(sepol_constrain, 0, sizeof(constraint_node_t)); rc = __cil_get_sepol_class_datum(pdb, class, &sepol_class); if (rc != SEPOL_OK) goto exit; rc = __cil_perms_to_datum(perms, sepol_class, &sepol_constrain->permissions); if (rc != SEPOL_OK) { goto exit; } rc = __cil_constrain_expr_to_sepol_expr(pdb, db, expr, &sepol_expr); if (rc != SEPOL_OK) { goto exit; } sepol_constrain->expr = sepol_expr; sepol_constrain->next = sepol_class->constraints; sepol_class->constraints = sepol_constrain; return SEPOL_OK; exit: free(sepol_constrain); return rc; } int cil_constrain_expand(policydb_t *pdb, const struct cil_db *db, struct cil_list *classperms, struct cil_list *expr) { int rc = SEPOL_ERR; struct cil_list_item *curr; cil_list_for_each(curr, classperms) { if (curr->flavor == CIL_CLASSPERMS) { struct cil_classperms *cp = curr->data; if (FLAVOR(cp->class) == CIL_CLASS) { rc = cil_constrain_to_policydb_helper(pdb, db, DATUM(cp->class), cp->perms, expr); if (rc != SEPOL_OK) { goto exit; } } else { /* MAP */ struct cil_list_item *i = NULL; cil_list_for_each(i, cp->perms) { struct cil_perm *cmp = i->data; rc = cil_constrain_expand(pdb, db, cmp->classperms, expr); if (rc != SEPOL_OK) { goto exit; } } } } else { /* SET */ struct cil_classperms_set *cp_set = curr->data; struct cil_classpermission *cp = cp_set->set; rc = cil_constrain_expand(pdb, db, cp->classperms, expr); if (rc != SEPOL_OK) { goto exit; } } } return SEPOL_OK; exit: return rc; } int cil_constrain_to_policydb(policydb_t *pdb, const struct cil_db *db, struct cil_constrain *cil_constrain) { int rc = SEPOL_ERR; rc = cil_constrain_expand(pdb, db, cil_constrain->classperms, cil_constrain->datum_expr); if (rc != SEPOL_OK) { goto exit; } return SEPOL_OK; exit: cil_log(CIL_ERR, "Failed to insert constraint into policydb\n"); return rc; } int cil_validatetrans_to_policydb(policydb_t *pdb, const struct cil_db *db, struct cil_validatetrans *cil_validatetrans) { int rc = SEPOL_ERR; struct cil_list *expr = cil_validatetrans->datum_expr; class_datum_t *sepol_class = NULL; struct cil_list *class_list; constraint_node_t *sepol_validatetrans = NULL; constraint_expr_t *sepol_expr = NULL; struct cil_list_item *c; class_list = cil_expand_class(cil_validatetrans->class); cil_list_for_each(c, class_list) { rc = __cil_get_sepol_class_datum(pdb, DATUM(c->data), &sepol_class); if (rc != SEPOL_OK) goto exit; sepol_validatetrans = cil_malloc(sizeof(*sepol_validatetrans)); memset(sepol_validatetrans, 0, sizeof(constraint_node_t)); rc = __cil_constrain_expr_to_sepol_expr(pdb, db, expr, &sepol_expr); if (rc != SEPOL_OK) { free(sepol_validatetrans); goto exit; } sepol_validatetrans->expr = sepol_expr; sepol_validatetrans->next = sepol_class->validatetrans; sepol_class->validatetrans = sepol_validatetrans; } rc = SEPOL_OK; exit: cil_list_destroy(&class_list, CIL_FALSE); return rc; } int __cil_cats_to_mls_level(policydb_t *pdb, struct cil_cats *cats, mls_level_t *mls_level) { int rc = SEPOL_ERR; struct cil_list_item *i; cat_datum_t *sepol_cat = NULL; cil_list_for_each(i, cats->datum_expr) { struct cil_tree_node *node = DATUM(i->data)->nodes->head->data; if (node->flavor == CIL_CATSET) { struct cil_list_item *j; struct cil_catset *cs = i->data; cil_list_for_each(j, cs->cats->datum_expr) { rc = __cil_get_sepol_cat_datum(pdb, j->data, &sepol_cat); if (rc != SEPOL_OK) goto exit; rc = ebitmap_set_bit(&mls_level->cat, sepol_cat->s.value - 1, 1); if (rc != SEPOL_OK) goto exit; } } else { rc = __cil_get_sepol_cat_datum(pdb, i->data, &sepol_cat); if (rc != SEPOL_OK) goto exit; rc = ebitmap_set_bit(&mls_level->cat, sepol_cat->s.value - 1, 1); if (rc != SEPOL_OK) goto exit; } } return SEPOL_OK; exit: return SEPOL_ERR; } int cil_sepol_level_define(policydb_t *pdb, struct cil_sens *cil_sens) { int rc = SEPOL_ERR; struct cil_list_item *curr; level_datum_t *sepol_level = NULL; mls_level_t *mls_level = NULL; rc = __cil_get_sepol_level_datum(pdb, DATUM(cil_sens), &sepol_level); if (rc != SEPOL_OK) goto exit; mls_level = sepol_level->level; ebitmap_init(&mls_level->cat); if (cil_sens->cats_list) { cil_list_for_each(curr, cil_sens->cats_list) { struct cil_cats *cats = curr->data; rc = __cil_cats_to_mls_level(pdb, cats, mls_level); if (rc != SEPOL_OK) { cil_log(CIL_INFO, "Failed to insert category set into sepol mls level\n"); goto exit; } } } sepol_level->defined = 1; return SEPOL_OK; exit: return rc; } int cil_level_to_mls_level(policydb_t *pdb, struct cil_level *cil_level, mls_level_t *mls_level) { int rc = SEPOL_ERR; struct cil_sens *cil_sens = cil_level->sens; struct cil_cats *cats = cil_level->cats; level_datum_t *sepol_level = NULL; rc = __cil_get_sepol_level_datum(pdb, DATUM(cil_sens), &sepol_level); if (rc != SEPOL_OK) goto exit; mls_level->sens = sepol_level->level->sens; ebitmap_init(&mls_level->cat); if (cats != NULL) { rc = __cil_cats_to_mls_level(pdb, cats, mls_level); if (rc != SEPOL_OK) { cil_log(CIL_INFO, "Failed to insert category set into sepol mls level\n"); goto exit; } } rc = SEPOL_OK; exit: return rc; } int __cil_levelrange_to_mls_range(policydb_t *pdb, struct cil_levelrange *cil_lvlrange, mls_range_t *mls_range) { int rc = SEPOL_ERR; struct cil_level *low = cil_lvlrange->low; struct cil_level *high = cil_lvlrange->high; mls_level_t *mls_level = NULL; mls_level = &mls_range->level[0]; rc = cil_level_to_mls_level(pdb, low, mls_level); if (rc != SEPOL_OK) { goto exit; } mls_level = &mls_range->level[1]; rc = cil_level_to_mls_level(pdb, high, mls_level); if (rc != SEPOL_OK) { goto exit; } return SEPOL_OK; exit: return rc; } int cil_userlevel_userrange_to_policydb(policydb_t *pdb, struct cil_user *cil_user) { int rc = SEPOL_ERR; struct cil_level *cil_level = cil_user->dftlevel; struct cil_levelrange *cil_levelrange = cil_user->range; user_datum_t *sepol_user = NULL; rc = __cil_get_sepol_user_datum(pdb, DATUM(cil_user), &sepol_user); if (rc != SEPOL_OK) goto exit; rc = cil_level_to_mls_level(pdb, cil_level, &sepol_user->exp_dfltlevel); if (rc != SEPOL_OK) { goto exit; } rc = __cil_levelrange_to_mls_range(pdb, cil_levelrange, &sepol_user->exp_range); if (rc != SEPOL_OK) { goto exit; } return SEPOL_OK; exit: return rc; } int __cil_context_to_sepol_context(policydb_t *pdb, struct cil_context *cil_context, context_struct_t *sepol_context) { int rc = SEPOL_ERR; struct cil_levelrange *cil_lvlrange = cil_context->range; user_datum_t *sepol_user = NULL; role_datum_t *sepol_role = NULL; type_datum_t *sepol_type = NULL; rc = __cil_get_sepol_user_datum(pdb, DATUM(cil_context->user), &sepol_user); if (rc != SEPOL_OK) goto exit; rc = __cil_get_sepol_role_datum(pdb, DATUM(cil_context->role), &sepol_role); if (rc != SEPOL_OK) goto exit; rc = __cil_get_sepol_type_datum(pdb, DATUM(cil_context->type), &sepol_type); if (rc != SEPOL_OK) goto exit; sepol_context->user = sepol_user->s.value; sepol_context->role = sepol_role->s.value; sepol_context->type = sepol_type->s.value; if (pdb->mls == CIL_TRUE) { mls_context_init(sepol_context); rc = __cil_levelrange_to_mls_range(pdb, cil_lvlrange, &sepol_context->range); if (rc != SEPOL_OK) { cil_log(CIL_ERR,"Problem with MLS\n"); mls_context_destroy(sepol_context); goto exit; } } return SEPOL_OK; exit: return rc; } int cil_sidorder_to_policydb(policydb_t *pdb, const struct cil_db *db) { int rc = SEPOL_ERR; struct cil_list_item *curr; unsigned count = 0; ocontext_t *tail = NULL; if (db->sidorder == NULL || db->sidorder->head == NULL) { cil_log(CIL_WARN, "No sidorder statement in policy\n"); return SEPOL_OK; } cil_list_for_each(curr, db->sidorder) { struct cil_sid *cil_sid = (struct cil_sid*)curr->data; struct cil_context *cil_context = cil_sid->context; if (cil_context != NULL) { ocontext_t *new_ocon = cil_add_ocontext(&pdb->ocontexts[OCON_ISID], &tail); count++; new_ocon->sid[0] = count; new_ocon->u.name = cil_strdup(cil_sid->datum.fqn); rc = __cil_context_to_sepol_context(pdb, cil_context, &new_ocon->context[0]); if (rc != SEPOL_OK) { cil_log(CIL_ERR,"Problem with context for SID %s\n",cil_sid->datum.fqn); goto exit; } } } return SEPOL_OK; exit: return rc; } int cil_rangetransition_to_policydb(policydb_t *pdb, const struct cil_db *db, struct cil_rangetransition *rangetrans, hashtab_t range_trans_table) { int rc = SEPOL_ERR; type_datum_t *sepol_src = NULL; type_datum_t *sepol_tgt = NULL; class_datum_t *sepol_class = NULL; struct cil_list *class_list; range_trans_t *newkey = NULL; struct mls_range *newdatum = NULL; ebitmap_t src_bitmap, tgt_bitmap; ebitmap_node_t *node1, *node2; unsigned int i, j; struct cil_list_item *c; struct mls_range *o_range = NULL; rc = __cil_expand_type(rangetrans->src, &src_bitmap); if (rc != SEPOL_OK) goto exit; rc = __cil_expand_type(rangetrans->exec, &tgt_bitmap); if (rc != SEPOL_OK) goto exit; class_list = cil_expand_class(rangetrans->obj); ebitmap_for_each_bit(&src_bitmap, node1, i) { if (!ebitmap_get_bit(&src_bitmap, i)) continue; rc = __cil_get_sepol_type_datum(pdb, DATUM(db->val_to_type[i]), &sepol_src); if (rc != SEPOL_OK) goto exit; ebitmap_for_each_bit(&tgt_bitmap, node2, j) { if (!ebitmap_get_bit(&tgt_bitmap, j)) continue; rc = __cil_get_sepol_type_datum(pdb, DATUM(db->val_to_type[j]), &sepol_tgt); if (rc != SEPOL_OK) goto exit; cil_list_for_each(c, class_list) { int add = CIL_TRUE; rc = __cil_get_sepol_class_datum(pdb, DATUM(c->data), &sepol_class); if (rc != SEPOL_OK) goto exit; newkey = cil_calloc(1, sizeof(*newkey)); newdatum = cil_calloc(1, sizeof(*newdatum)); newkey->source_type = sepol_src->s.value; newkey->target_type = sepol_tgt->s.value; newkey->target_class = sepol_class->s.value; rc = __cil_levelrange_to_mls_range(pdb, rangetrans->range, newdatum); if (rc != SEPOL_OK) { free(newkey); free(newdatum); goto exit; } rc = hashtab_insert(range_trans_table, (hashtab_key_t)newkey, newdatum); if (rc != SEPOL_OK) { if (rc == SEPOL_EEXIST) { add = CIL_FALSE; o_range = hashtab_search(range_trans_table, (hashtab_key_t)newkey); if (!mls_range_eq(newdatum, o_range)) { cil_log(CIL_ERR, "Conflicting Range transition rules\n"); } else { rc = SEPOL_OK; } } else { cil_log(CIL_ERR, "Out of memory\n"); } } if (add == CIL_TRUE) { rc = hashtab_insert(pdb->range_tr, (hashtab_key_t)newkey, newdatum); if (rc != SEPOL_OK) { mls_range_destroy(newdatum); free(newdatum); free(newkey); cil_log(CIL_ERR, "Out of memory\n"); goto exit; } } else { mls_range_destroy(newdatum); free(newdatum); free(newkey); if (rc != SEPOL_OK) { goto exit; } } } } } rc = SEPOL_OK; exit: ebitmap_destroy(&src_bitmap); ebitmap_destroy(&tgt_bitmap); cil_list_destroy(&class_list, CIL_FALSE); return rc; } int cil_ibpkeycon_to_policydb(policydb_t *pdb, struct cil_sort *ibpkeycons) { int rc = SEPOL_ERR; uint32_t i = 0; ocontext_t *tail = NULL; struct in6_addr subnet_prefix; for (i = 0; i < ibpkeycons->count; i++) { struct cil_ibpkeycon *cil_ibpkeycon = ibpkeycons->array[i]; ocontext_t *new_ocon = cil_add_ocontext(&pdb->ocontexts[OCON_IBPKEY], &tail); rc = inet_pton(AF_INET6, cil_ibpkeycon->subnet_prefix_str, &subnet_prefix); if (rc != 1) { cil_log(CIL_ERR, "ibpkeycon subnet prefix not in valid IPV6 format\n"); rc = SEPOL_ERR; goto exit; } memcpy(&new_ocon->u.ibpkey.subnet_prefix, &subnet_prefix.s6_addr[0], sizeof(new_ocon->u.ibpkey.subnet_prefix)); new_ocon->u.ibpkey.low_pkey = cil_ibpkeycon->pkey_low; new_ocon->u.ibpkey.high_pkey = cil_ibpkeycon->pkey_high; rc = __cil_context_to_sepol_context(pdb, cil_ibpkeycon->context, &new_ocon->context[0]); if (rc != SEPOL_OK) goto exit; } return SEPOL_OK; exit: return rc; } int cil_portcon_to_policydb(policydb_t *pdb, struct cil_sort *portcons) { int rc = SEPOL_ERR; uint32_t i = 0; ocontext_t *tail = NULL; for (i = 0; i < portcons->count; i++) { struct cil_portcon *cil_portcon = portcons->array[i]; ocontext_t *new_ocon = cil_add_ocontext(&pdb->ocontexts[OCON_PORT], &tail); switch (cil_portcon->proto) { case CIL_PROTOCOL_UDP: new_ocon->u.port.protocol = IPPROTO_UDP; break; case CIL_PROTOCOL_TCP: new_ocon->u.port.protocol = IPPROTO_TCP; break; case CIL_PROTOCOL_DCCP: new_ocon->u.port.protocol = IPPROTO_DCCP; break; case CIL_PROTOCOL_SCTP: new_ocon->u.port.protocol = IPPROTO_SCTP; break; default: /* should not get here */ rc = SEPOL_ERR; goto exit; } new_ocon->u.port.low_port = cil_portcon->port_low; new_ocon->u.port.high_port = cil_portcon->port_high; rc = __cil_context_to_sepol_context(pdb, cil_portcon->context, &new_ocon->context[0]); if (rc != SEPOL_OK) { goto exit; } } return SEPOL_OK; exit: return rc; } int cil_netifcon_to_policydb(policydb_t *pdb, struct cil_sort *netifcons) { int rc = SEPOL_ERR; uint32_t i = 0; ocontext_t *tail = NULL; for (i = 0; i < netifcons->count; i++) { ocontext_t *new_ocon = cil_add_ocontext(&pdb->ocontexts[OCON_NETIF], &tail); struct cil_netifcon *cil_netifcon = netifcons->array[i]; new_ocon->u.name = cil_strdup(cil_netifcon->interface_str); rc = __cil_context_to_sepol_context(pdb, cil_netifcon->if_context, &new_ocon->context[0]); if (rc != SEPOL_OK) { goto exit; } rc = __cil_context_to_sepol_context(pdb, cil_netifcon->packet_context, &new_ocon->context[1]); if (rc != SEPOL_OK) { context_destroy(&new_ocon->context[0]); goto exit; } } return SEPOL_OK; exit: return rc; } int cil_ibendportcon_to_policydb(policydb_t *pdb, struct cil_sort *ibendportcons) { int rc = SEPOL_ERR; uint32_t i; ocontext_t *tail = NULL; for (i = 0; i < ibendportcons->count; i++) { ocontext_t *new_ocon = cil_add_ocontext(&pdb->ocontexts[OCON_IBENDPORT], &tail); struct cil_ibendportcon *cil_ibendportcon = ibendportcons->array[i]; new_ocon->u.ibendport.dev_name = cil_strdup(cil_ibendportcon->dev_name_str); new_ocon->u.ibendport.port = cil_ibendportcon->port; rc = __cil_context_to_sepol_context(pdb, cil_ibendportcon->context, &new_ocon->context[0]); if (rc != SEPOL_OK) goto exit; } return SEPOL_OK; exit: return rc; } int cil_nodecon_to_policydb(policydb_t *pdb, struct cil_sort *nodecons) { int rc = SEPOL_ERR; uint32_t i = 0; ocontext_t *tail = NULL; ocontext_t *tail6 = NULL; for (i = 0; i < nodecons->count; i++) { ocontext_t *new_ocon = NULL; struct cil_nodecon *cil_nodecon = nodecons->array[i]; if (cil_nodecon->addr->family == AF_INET) { new_ocon = cil_add_ocontext(&pdb->ocontexts[OCON_NODE], &tail); new_ocon->u.node.addr = cil_nodecon->addr->ip.v4.s_addr; new_ocon->u.node.mask = cil_nodecon->mask->ip.v4.s_addr; } else if (cil_nodecon->addr->family == AF_INET6) { new_ocon = cil_add_ocontext(&pdb->ocontexts[OCON_NODE6], &tail6); memcpy(new_ocon->u.node6.addr, &cil_nodecon->addr->ip.v6.s6_addr[0], 16); memcpy(new_ocon->u.node6.mask, &cil_nodecon->mask->ip.v6.s6_addr[0], 16); } else { /* should not get here */ rc = SEPOL_ERR; goto exit; } rc = __cil_context_to_sepol_context(pdb, cil_nodecon->context, &new_ocon->context[0]); if (rc != SEPOL_OK) { goto exit; } } return SEPOL_OK; exit: return rc; } int cil_fsuse_to_policydb(policydb_t *pdb, struct cil_sort *fsuses) { int rc = SEPOL_ERR; uint32_t i = 0; ocontext_t *tail = NULL; for (i = 0; i < fsuses->count; i++) { ocontext_t *new_ocon = cil_add_ocontext(&pdb->ocontexts[OCON_FSUSE], &tail); struct cil_fsuse *cil_fsuse = fsuses->array[i]; new_ocon->u.name = cil_strdup(cil_fsuse->fs_str); new_ocon->v.behavior = cil_fsuse->type; rc = __cil_context_to_sepol_context(pdb, cil_fsuse->context, &new_ocon->context[0]); if (rc != SEPOL_OK) { goto exit; } } return SEPOL_OK; exit: return rc; } int cil_genfscon_to_policydb(policydb_t *pdb, struct cil_sort *genfscons) { int rc = SEPOL_ERR; uint32_t i = 0; genfs_t *genfs_tail = NULL; ocontext_t *ocon_tail = NULL; for (i = 0; i < genfscons->count; i++) { struct cil_genfscon *cil_genfscon = genfscons->array[i]; ocontext_t *new_ocon = cil_malloc(sizeof(ocontext_t)); memset(new_ocon, 0, sizeof(ocontext_t)); if (genfs_tail && strcmp(genfs_tail->fstype, cil_genfscon->fs_str) == 0) { ocon_tail->next = new_ocon; } else { genfs_t *new_genfs = cil_malloc(sizeof(genfs_t)); memset(new_genfs, 0, sizeof(genfs_t)); new_genfs->fstype = cil_strdup(cil_genfscon->fs_str); new_genfs->head = new_ocon; if (genfs_tail) { genfs_tail->next = new_genfs; } else { pdb->genfs = new_genfs; } genfs_tail = new_genfs; } ocon_tail = new_ocon; new_ocon->u.name = cil_strdup(cil_genfscon->path_str); rc = __cil_context_to_sepol_context(pdb, cil_genfscon->context, &new_ocon->context[0]); if (rc != SEPOL_OK) { goto exit; } } return SEPOL_OK; exit: return rc; } int cil_pirqcon_to_policydb(policydb_t *pdb, struct cil_sort *pirqcons) { int rc = SEPOL_ERR; uint32_t i = 0; ocontext_t *tail = NULL; for (i = 0; i < pirqcons->count; i++) { ocontext_t *new_ocon = cil_add_ocontext(&pdb->ocontexts[OCON_XEN_PIRQ], &tail); struct cil_pirqcon *cil_pirqcon = pirqcons->array[i]; new_ocon->u.pirq = cil_pirqcon->pirq; rc = __cil_context_to_sepol_context(pdb, cil_pirqcon->context, &new_ocon->context[0]); if (rc != SEPOL_OK) { goto exit; } } return SEPOL_OK; exit: return rc; } int cil_iomemcon_to_policydb(policydb_t *pdb, struct cil_sort *iomemcons) { int rc = SEPOL_ERR; uint32_t i = 0; ocontext_t *tail = NULL; for (i = 0; i < iomemcons->count; i++) { ocontext_t *new_ocon = cil_add_ocontext(&pdb->ocontexts[OCON_XEN_IOMEM], &tail); struct cil_iomemcon *cil_iomemcon = iomemcons->array[i]; new_ocon->u.iomem.low_iomem = cil_iomemcon->iomem_low; new_ocon->u.iomem.high_iomem = cil_iomemcon->iomem_high; rc = __cil_context_to_sepol_context(pdb, cil_iomemcon->context, &new_ocon->context[0]); if (rc != SEPOL_OK) { goto exit; } } return SEPOL_OK; exit: return rc; } int cil_ioportcon_to_policydb(policydb_t *pdb, struct cil_sort *ioportcons) { int rc = SEPOL_ERR; uint32_t i = 0; ocontext_t *tail = NULL; for (i = 0; i < ioportcons->count; i++) { ocontext_t *new_ocon = cil_add_ocontext(&pdb->ocontexts[OCON_XEN_IOPORT], &tail); struct cil_ioportcon *cil_ioportcon = ioportcons->array[i]; new_ocon->u.ioport.low_ioport = cil_ioportcon->ioport_low; new_ocon->u.ioport.high_ioport = cil_ioportcon->ioport_high; rc = __cil_context_to_sepol_context(pdb, cil_ioportcon->context, &new_ocon->context[0]); if (rc != SEPOL_OK) { goto exit; } } return SEPOL_OK; exit: return rc; } int cil_pcidevicecon_to_policydb(policydb_t *pdb, struct cil_sort *pcidevicecons) { int rc = SEPOL_ERR; uint32_t i = 0; ocontext_t *tail = NULL; for (i = 0; i < pcidevicecons->count; i++) { ocontext_t *new_ocon = cil_add_ocontext(&pdb->ocontexts[OCON_XEN_PCIDEVICE], &tail); struct cil_pcidevicecon *cil_pcidevicecon = pcidevicecons->array[i]; new_ocon->u.device = cil_pcidevicecon->dev; rc = __cil_context_to_sepol_context(pdb, cil_pcidevicecon->context, &new_ocon->context[0]); if (rc != SEPOL_OK) { goto exit; } } return SEPOL_OK; exit: return rc; } int cil_devicetreecon_to_policydb(policydb_t *pdb, struct cil_sort *devicetreecons) { int rc = SEPOL_ERR; uint32_t i = 0; ocontext_t *tail = NULL; for (i = 0; i < devicetreecons->count; i++) { ocontext_t *new_ocon = cil_add_ocontext(&pdb->ocontexts[OCON_XEN_DEVICETREE], &tail); struct cil_devicetreecon *cil_devicetreecon = devicetreecons->array[i]; new_ocon->u.name = cil_strdup(cil_devicetreecon->path); rc = __cil_context_to_sepol_context(pdb, cil_devicetreecon->context, &new_ocon->context[0]); if (rc != SEPOL_OK) { goto exit; } } return SEPOL_OK; exit: return rc; } int cil_default_to_policydb(policydb_t *pdb, struct cil_default *def) { struct cil_list_item *curr; class_datum_t *sepol_class; struct cil_list *class_list; cil_list_for_each(curr, def->class_datums) { struct cil_list_item *c; class_list = cil_expand_class(curr->data); cil_list_for_each(c, class_list) { int rc = __cil_get_sepol_class_datum(pdb, DATUM(c->data), &sepol_class); if (rc != SEPOL_OK) goto exit; switch (def->flavor) { case CIL_DEFAULTUSER: if (!sepol_class->default_user) { sepol_class->default_user = def->object; } else if (sepol_class->default_user != (char)def->object) { cil_log(CIL_ERR,"User default labeling for class %s already specified\n",DATUM(c->data)->fqn); goto exit; } break; case CIL_DEFAULTROLE: if (!sepol_class->default_role) { sepol_class->default_role = def->object; } else if (sepol_class->default_role != (char)def->object) { cil_log(CIL_ERR,"Role default labeling for class %s already specified\n",DATUM(c->data)->fqn); goto exit; } break; case CIL_DEFAULTTYPE: if (!sepol_class->default_type) { sepol_class->default_type = def->object; } else if (sepol_class->default_type != (char)def->object) { cil_log(CIL_ERR,"Type default labeling for class %s already specified\n",DATUM(c->data)->fqn); goto exit; } break; default: goto exit; } } cil_list_destroy(&class_list, CIL_FALSE); } return SEPOL_OK; exit: cil_list_destroy(&class_list, CIL_FALSE); return SEPOL_ERR; } int cil_defaultrange_to_policydb(policydb_t *pdb, struct cil_defaultrange *def) { struct cil_list_item *curr; class_datum_t *sepol_class; struct cil_list *class_list; cil_list_for_each(curr, def->class_datums) { struct cil_list_item *c; class_list = cil_expand_class(curr->data); cil_list_for_each(c, class_list) { int rc = __cil_get_sepol_class_datum(pdb, DATUM(c->data), &sepol_class); if (rc != SEPOL_OK) goto exit; if (!sepol_class->default_range) { sepol_class->default_range = def->object_range; } else if (sepol_class->default_range != (char)def->object_range) { cil_log(CIL_ERR,"Range default labeling for class %s already specified\n", DATUM(curr->data)->fqn); goto exit; } } cil_list_destroy(&class_list, CIL_FALSE); } return SEPOL_OK; exit: cil_list_destroy(&class_list, CIL_FALSE); return SEPOL_ERR; } int __cil_node_to_policydb(struct cil_tree_node *node, void *extra_args) { int rc = SEPOL_OK; int pass; struct cil_args_binary *args = extra_args; const struct cil_db *db; policydb_t *pdb; hashtab_t filename_trans_table; hashtab_t range_trans_table; hashtab_t role_trans_table; void **type_value_to_cil; db = args->db; pdb = args->pdb; pass = args->pass; filename_trans_table = args->filename_trans_table; range_trans_table = args->range_trans_table; role_trans_table = args->role_trans_table; type_value_to_cil = args->type_value_to_cil; if (node->flavor >= CIL_MIN_DECLARATIVE) { if (node != DATUM(node->data)->nodes->head->data) { goto exit; } } switch (pass) { case 1: switch (node->flavor) { case CIL_ROLE: rc = cil_role_to_policydb(pdb, node->data); break; case CIL_TYPE: rc = cil_type_to_policydb(pdb, node->data, type_value_to_cil); break; case CIL_TYPEATTRIBUTE: rc = cil_typeattribute_to_policydb(pdb, node->data, type_value_to_cil); break; case CIL_POLICYCAP: rc = cil_policycap_to_policydb(pdb, node->data); break; case CIL_USER: rc = cil_user_to_policydb(pdb, node->data); break; case CIL_BOOL: rc = cil_bool_to_policydb(pdb, node->data); break; case CIL_CATALIAS: if (pdb->mls == CIL_TRUE) { rc = cil_catalias_to_policydb(pdb, node->data); } break; case CIL_SENS: if (pdb->mls == CIL_TRUE) { rc = cil_sepol_level_define(pdb, node->data); } break; default: break; } break; case 2: switch (node->flavor) { case CIL_TYPE: rc = cil_type_bounds_to_policydb(pdb, node->data); break; case CIL_TYPEALIAS: rc = cil_typealias_to_policydb(pdb, node->data); break; case CIL_TYPEPERMISSIVE: rc = cil_typepermissive_to_policydb(pdb, node->data); break; case CIL_TYPEATTRIBUTE: rc = cil_typeattribute_to_bitmap(pdb, db, node->data); break; case CIL_SENSALIAS: if (pdb->mls == CIL_TRUE) { rc = cil_sensalias_to_policydb(pdb, node->data); } break; case CIL_ROLE: rc = cil_role_bounds_to_policydb(pdb, node->data); if (rc != SEPOL_OK) goto exit; rc = cil_roletype_to_policydb(pdb, db, node->data); break; case CIL_USER: rc = cil_user_bounds_to_policydb(pdb, node->data); if (rc != SEPOL_OK) goto exit; if (pdb->mls == CIL_TRUE) { rc = cil_userlevel_userrange_to_policydb(pdb, node->data); if (rc != SEPOL_OK) { goto exit; } } rc = cil_userrole_to_policydb(pdb, db, node->data); break; case CIL_TYPE_RULE: rc = cil_type_rule_to_policydb(pdb, db, node->data); break; case CIL_AVRULE: case CIL_AVRULEX: { struct cil_avrule *rule = node->data; if (db->disable_neverallow != CIL_TRUE && rule->rule_kind == CIL_AVRULE_NEVERALLOW) { struct cil_list *neverallows = args->neverallows; cil_list_prepend(neverallows, CIL_LIST_ITEM, node); } break; } case CIL_ROLETRANSITION: rc = cil_roletrans_to_policydb(pdb, db, node->data, role_trans_table); break; case CIL_ROLEATTRIBUTESET: /*rc = cil_roleattributeset_to_policydb(pdb, node->data);*/ break; case CIL_NAMETYPETRANSITION: rc = cil_typetransition_to_policydb(pdb, db, node->data, filename_trans_table); break; case CIL_CONSTRAIN: rc = cil_constrain_to_policydb(pdb, db, node->data); break; case CIL_MLSCONSTRAIN: if (pdb->mls == CIL_TRUE) { rc = cil_constrain_to_policydb(pdb, db, node->data); } break; case CIL_VALIDATETRANS: rc = cil_validatetrans_to_policydb(pdb, db, node->data); break; case CIL_MLSVALIDATETRANS: if (pdb->mls == CIL_TRUE) { rc = cil_validatetrans_to_policydb(pdb, db, node->data); } break; case CIL_RANGETRANSITION: if (pdb->mls == CIL_TRUE) { rc = cil_rangetransition_to_policydb(pdb, db, node->data, range_trans_table); } break; case CIL_DEFAULTUSER: case CIL_DEFAULTROLE: case CIL_DEFAULTTYPE: rc = cil_default_to_policydb(pdb, node->data); break; case CIL_DEFAULTRANGE: rc = cil_defaultrange_to_policydb(pdb, node->data); break; default: break; } break; case 3: switch (node->flavor) { case CIL_BOOLEANIF: rc = cil_booleanif_to_policydb(pdb, db, node, filename_trans_table); break; case CIL_AVRULE: { struct cil_avrule *rule = node->data; if (rule->rule_kind != CIL_AVRULE_NEVERALLOW) { rc = cil_avrule_to_policydb(pdb, db, node->data); } } break; case CIL_AVRULEX: { struct cil_avrule *rule = node->data; if (rule->rule_kind != CIL_AVRULE_NEVERALLOW) { rc = cil_avrulex_to_hashtable(pdb, db, node->data, args); } } break; case CIL_ROLEALLOW: rc = cil_roleallow_to_policydb(pdb, db, node->data); break; default: break; } default: break; } exit: if (rc != SEPOL_OK) { cil_tree_log(node, CIL_ERR, "Binary policy creation failed"); } return rc; } int __cil_binary_create_helper(struct cil_tree_node *node, uint32_t *finished, void *extra_args) { int rc = SEPOL_ERR; if (node->flavor == CIL_BLOCK) { struct cil_block *blk = node->data; if (blk->is_abstract == CIL_TRUE) { *finished = CIL_TREE_SKIP_HEAD; rc = SEPOL_OK; goto exit; } } else if (node->flavor == CIL_MACRO) { *finished = CIL_TREE_SKIP_HEAD; rc = SEPOL_OK; goto exit; } else if (node->flavor == CIL_BOOLEANIF) { *finished = CIL_TREE_SKIP_HEAD; } rc = __cil_node_to_policydb(node, extra_args); if (rc != SEPOL_OK) { goto exit; } exit: return rc; } int __cil_contexts_to_policydb(policydb_t *pdb, const struct cil_db *db) { int rc = SEPOL_ERR; rc = cil_portcon_to_policydb(pdb, db->portcon); if (rc != SEPOL_OK) { goto exit; } rc = cil_netifcon_to_policydb(pdb, db->netifcon); if (rc != SEPOL_OK) { goto exit; } rc = cil_nodecon_to_policydb(pdb, db->nodecon); if (rc != SEPOL_OK) { goto exit; } rc = cil_fsuse_to_policydb(pdb, db->fsuse); if (rc != SEPOL_OK) { goto exit; } rc = cil_genfscon_to_policydb(pdb, db->genfscon); if (rc != SEPOL_OK) { goto exit; } rc = cil_ibpkeycon_to_policydb(pdb, db->ibpkeycon); if (rc != SEPOL_OK) { goto exit; } rc = cil_ibendportcon_to_policydb(pdb, db->ibendportcon); if (rc != SEPOL_OK) { goto exit; } if (db->target_platform == SEPOL_TARGET_XEN) { rc = cil_pirqcon_to_policydb(pdb, db->pirqcon); if (rc != SEPOL_OK) { goto exit; } rc = cil_iomemcon_to_policydb(pdb, db->iomemcon); if (rc != SEPOL_OK) { goto exit; } rc = cil_ioportcon_to_policydb(pdb, db->ioportcon); if (rc != SEPOL_OK) { goto exit; } rc = cil_pcidevicecon_to_policydb(pdb, db->pcidevicecon); if (rc != SEPOL_OK) { goto exit; } rc = cil_devicetreecon_to_policydb(pdb, db->devicetreecon); if (rc != SEPOL_OK) { goto exit; } } return SEPOL_OK; exit: return rc; } int __cil_common_val_array_insert(hashtab_key_t key, hashtab_datum_t datum, void *data) { policydb_t *pdb = data; common_datum_t *common = (common_datum_t *)datum; if (common->s.value < 1 || common->s.value > pdb->p_commons.nprim) { return -EINVAL; } pdb->p_common_val_to_name[common->s.value - 1] = (char *)key; return 0; } int __cil_class_val_array_insert(hashtab_key_t key, hashtab_datum_t datum, void *data) { policydb_t *pdb = data; class_datum_t *class = (class_datum_t *)datum; if (class->s.value < 1 || class->s.value > pdb->p_classes.nprim) { return -EINVAL; } pdb->p_class_val_to_name[class->s.value - 1] = (char *)key; pdb->class_val_to_struct[class->s.value - 1] = class; return 0; } int __cil_role_val_array_insert(hashtab_key_t key, hashtab_datum_t datum, void *data) { policydb_t *pdb = data; role_datum_t *role = (role_datum_t *)datum; if (role->s.value < 1 || role->s.value > pdb->p_roles.nprim) { return -EINVAL; } pdb->p_role_val_to_name[role->s.value - 1] = (char *)key; pdb->role_val_to_struct[role->s.value - 1] = role; return 0; } int __cil_type_val_array_insert(hashtab_key_t key, hashtab_datum_t datum, void *data) { policydb_t *pdb = data; type_datum_t *type = (type_datum_t *)datum; if (type->s.value < 1 || type->s.value > pdb->p_types.nprim) { return -EINVAL; } pdb->p_type_val_to_name[type->s.value - 1] = (char *)key; pdb->type_val_to_struct[type->s.value - 1] = type; return 0; } int __cil_user_val_array_insert(hashtab_key_t key, hashtab_datum_t datum, void *data) { policydb_t *pdb = data; user_datum_t *user = (user_datum_t *)datum; if (user->s.value < 1 || user->s.value > pdb->p_users.nprim) { return -EINVAL; } pdb->p_user_val_to_name[user->s.value - 1] = (char *)key; pdb->user_val_to_struct[user->s.value - 1] = user; return 0; } int __cil_bool_val_array_insert(hashtab_key_t key, hashtab_datum_t datum, void *data) { policydb_t *pdb = data; cond_bool_datum_t *bool = (cond_bool_datum_t *)datum; if (bool->s.value < 1 || bool->s.value > pdb->p_bools.nprim) { return -EINVAL; } pdb->p_bool_val_to_name[bool->s.value - 1] = (char *)key; pdb->bool_val_to_struct[bool->s.value - 1] = bool; return 0; } int __cil_level_val_array_insert(hashtab_key_t key, hashtab_datum_t datum, void *data) { policydb_t *pdb = data; level_datum_t *level = (level_datum_t *)datum; if (level->level->sens < 1 || level->level->sens > pdb->p_levels.nprim) { return -EINVAL; } pdb->p_sens_val_to_name[level->level->sens - 1] = (char *)key; return 0; } int __cil_cat_val_array_insert(hashtab_key_t key, hashtab_datum_t datum, void *data) { policydb_t *pdb = data; cat_datum_t *cat = (cat_datum_t *)datum; if (cat->s.value < 1 || cat->s.value > pdb->p_cats.nprim) { return -EINVAL; } pdb->p_cat_val_to_name[cat->s.value - 1] = (char *)key; return 0; } int __cil_policydb_val_arrays_create(policydb_t *policydb) { int rc = SEPOL_ERR; policydb->p_common_val_to_name = cil_malloc(sizeof(char *) * policydb->p_commons.nprim); rc = hashtab_map(policydb->p_commons.table, &__cil_common_val_array_insert, policydb); if (rc != SEPOL_OK) { goto exit; } policydb->p_class_val_to_name = cil_malloc(sizeof(char *) * policydb->p_classes.nprim); policydb->class_val_to_struct = cil_malloc(sizeof(class_datum_t *) * policydb->p_classes.nprim); rc = hashtab_map(policydb->p_classes.table, &__cil_class_val_array_insert, policydb); if (rc != SEPOL_OK) { goto exit; } policydb->p_role_val_to_name = cil_malloc(sizeof(char *) * policydb->p_roles.nprim); policydb->role_val_to_struct = cil_malloc(sizeof(role_datum_t *) * policydb->p_roles.nprim); rc = hashtab_map(policydb->p_roles.table, &__cil_role_val_array_insert, policydb); if (rc != SEPOL_OK) { goto exit; } policydb->p_type_val_to_name = cil_malloc(sizeof(char *) * policydb->p_types.nprim); policydb->type_val_to_struct = cil_malloc(sizeof(type_datum_t *) * policydb->p_types.nprim); rc = hashtab_map(policydb->p_types.table, &__cil_type_val_array_insert, policydb); if (rc != SEPOL_OK) { goto exit; } policydb->p_user_val_to_name = cil_malloc(sizeof(char *) * policydb->p_users.nprim); policydb->user_val_to_struct = cil_malloc(sizeof(user_datum_t *) * policydb->p_users.nprim); rc = hashtab_map(policydb->p_users.table, &__cil_user_val_array_insert, policydb); if (rc != SEPOL_OK) { goto exit; } policydb->p_bool_val_to_name = cil_malloc(sizeof(char *) * policydb->p_bools.nprim); policydb->bool_val_to_struct = cil_malloc(sizeof(cond_bool_datum_t *) * policydb->p_bools.nprim); rc = hashtab_map(policydb->p_bools.table, &__cil_bool_val_array_insert, policydb); if (rc != SEPOL_OK) { goto exit; } policydb->p_sens_val_to_name = cil_malloc(sizeof(char *) * policydb->p_levels.nprim); rc = hashtab_map(policydb->p_levels.table, &__cil_level_val_array_insert, policydb); if (rc != SEPOL_OK) { goto exit; } policydb->p_cat_val_to_name = cil_malloc(sizeof(char *) * policydb->p_cats.nprim); rc = hashtab_map(policydb->p_cats.table, &__cil_cat_val_array_insert, policydb); if (rc != SEPOL_OK) { goto exit; } exit: return rc; } static void __cil_set_conditional_state_and_flags(policydb_t *pdb) { cond_node_t *cur; for (cur = pdb->cond_list; cur != NULL; cur = cur->next) { int new_state; cond_av_list_t *c; new_state = cond_evaluate_expr(pdb, cur->expr); cur->cur_state = new_state; if (new_state == -1) { cil_log(CIL_WARN, "Expression result was undefined - disabling all rules\n"); } for (c = cur->true_list; c != NULL; c = c->next) { if (new_state <= 0) { c->node->key.specified &= ~AVTAB_ENABLED; } else { c->node->key.specified |= AVTAB_ENABLED; } } for (c = cur->false_list; c != NULL; c = c->next) { if (new_state) { /* -1 or 1 */ c->node->key.specified &= ~AVTAB_ENABLED; } else { c->node->key.specified |= AVTAB_ENABLED; } } } } int __cil_policydb_create(const struct cil_db *db, struct sepol_policydb **spdb) { int rc; struct policydb *pdb = NULL; rc = sepol_policydb_create(spdb); if (rc < 0) { cil_log(CIL_ERR, "Failed to create policy db\n"); // spdb could be a dangling pointer at this point, so reset it so // callers of this function don't need to worry about freeing garbage *spdb = NULL; goto exit; } pdb = &(*spdb)->p; pdb->policy_type = POLICY_KERN; pdb->target_platform = db->target_platform; pdb->policyvers = db->policy_version; pdb->handle_unknown = db->handle_unknown; pdb->mls = db->mls; return SEPOL_OK; exit: return rc; } int __cil_policydb_init(policydb_t *pdb, const struct cil_db *db, struct cil_class *class_value_to_cil[], struct cil_perm **perm_value_to_cil[]) { int rc = SEPOL_ERR; // these flags should get set in __cil_policydb_create. However, for // backwards compatability, it is possible that __cil_policydb_create is // never called. So, they must also be set here. pdb->handle_unknown = db->handle_unknown; pdb->mls = db->mls; rc = cil_classorder_to_policydb(pdb, db, class_value_to_cil, perm_value_to_cil); if (rc != SEPOL_OK) { goto exit; } if (pdb->mls == CIL_TRUE) { rc = cil_catorder_to_policydb(pdb, db); if (rc != SEPOL_OK) { goto exit; } rc = cil_sensitivityorder_to_policydb(pdb, db); if (rc != SEPOL_OK) { goto exit; } } rc = avtab_alloc(&pdb->te_avtab, MAX_AVTAB_SIZE); if (rc != SEPOL_OK) { goto exit; } rc = avtab_alloc(&pdb->te_cond_avtab, MAX_AVTAB_SIZE); if (rc != SEPOL_OK) { goto exit; } return SEPOL_OK; exit: return rc; } static unsigned int filename_trans_hash(hashtab_t h, const_hashtab_key_t key) { const filename_trans_t *k = (const filename_trans_t *)key; return ((k->tclass + (k->ttype << 2) + (k->stype << 9)) & (h->size - 1)); } static int filename_trans_compare(hashtab_t h __attribute__ ((unused)), const_hashtab_key_t key1, const_hashtab_key_t key2) { const filename_trans_t *a = (const filename_trans_t *)key1; const filename_trans_t *b = (const filename_trans_t *)key2; return a->stype != b->stype || a->ttype != b->ttype || a->tclass != b->tclass || strcmp(a->name, b->name); } static unsigned int range_trans_hash(hashtab_t h, const_hashtab_key_t key) { const range_trans_t *k = (const range_trans_t *)key; return ((k->target_class + (k->target_type << 2) + (k->source_type << 5)) & (h->size - 1)); } static int range_trans_compare(hashtab_t h __attribute__ ((unused)), const_hashtab_key_t key1, const_hashtab_key_t key2) { const range_trans_t *a = (const range_trans_t *)key1; const range_trans_t *b = (const range_trans_t *)key2; return a->source_type != b->source_type || a->target_type != b->target_type || a->target_class != b->target_class; } static unsigned int role_trans_hash(hashtab_t h, const_hashtab_key_t key) { const role_trans_t *k = (const role_trans_t *)key; return ((k->role + (k->type << 2) + (k->tclass << 5)) & (h->size - 1)); } static int role_trans_compare(hashtab_t h __attribute__ ((unused)), const_hashtab_key_t key1, const_hashtab_key_t key2) { const role_trans_t *a = (const role_trans_t *)key1; const role_trans_t *b = (const role_trans_t *)key2; return a->role != b->role || a->type != b->type || a->tclass != b->tclass; } /* Based on MurmurHash3, written by Austin Appleby and placed in the * public domain. */ static unsigned int avrulex_hash(__attribute__((unused)) hashtab_t h, const_hashtab_key_t key) { const avtab_key_t *k = (const avtab_key_t *)key; static const uint32_t c1 = 0xcc9e2d51; static const uint32_t c2 = 0x1b873593; static const uint32_t r1 = 15; static const uint32_t r2 = 13; static const uint32_t m = 5; static const uint32_t n = 0xe6546b64; uint32_t hash = 0; #define mix(input) { \ uint32_t v = input; \ v *= c1; \ v = (v << r1) | (v >> (32 - r1)); \ v *= c2; \ hash ^= v; \ hash = (hash << r2) | (hash >> (32 - r2)); \ hash = hash * m + n; \ } mix(k->target_class); mix(k->target_type); mix(k->source_type); mix(k->specified); #undef mix hash ^= hash >> 16; hash *= 0x85ebca6b; hash ^= hash >> 13; hash *= 0xc2b2ae35; hash ^= hash >> 16; return hash & (AVRULEX_TABLE_SIZE - 1); } static int avrulex_compare(hashtab_t h __attribute__ ((unused)), const_hashtab_key_t key1, const_hashtab_key_t key2) { const avtab_key_t *a = (const avtab_key_t *)key1; const avtab_key_t *b = (const avtab_key_t *)key2; return a->source_type != b->source_type || a->target_type != b->target_type || a->target_class != b->target_class || a->specified != b->specified; } int cil_binary_create(const struct cil_db *db, sepol_policydb_t **policydb) { int rc = SEPOL_ERR; struct sepol_policydb *pdb = NULL; rc = __cil_policydb_create(db, &pdb); if (rc != SEPOL_OK) { goto exit; } rc = cil_binary_create_allocated_pdb(db, pdb); if (rc != SEPOL_OK) { goto exit; } *policydb = pdb; return SEPOL_OK; exit: sepol_policydb_free(pdb); return rc; } static void __cil_destroy_sepol_class_perms(class_perm_node_t *curr) { class_perm_node_t *next; while (curr) { next = curr->next; free(curr); curr = next; } } static int __cil_rule_to_sepol_class_perms(policydb_t *pdb, struct cil_list *classperms, class_perm_node_t **sepol_class_perms) { int rc = SEPOL_ERR; struct cil_list_item *i; cil_list_for_each(i, classperms) { if (i->flavor == CIL_CLASSPERMS) { struct cil_classperms *cp = i->data; if (FLAVOR(cp->class) == CIL_CLASS) { class_perm_node_t *cpn = NULL; class_datum_t *sepol_class = NULL; uint32_t data = 0; rc = __cil_get_sepol_class_datum(pdb, DATUM(cp->class), &sepol_class); if (rc != SEPOL_OK) goto exit; rc = __cil_perms_to_datum(cp->perms, sepol_class, &data); if (rc != SEPOL_OK) goto exit; if (data == 0) { /* No permissions */ return SEPOL_OK; } cpn = cil_malloc(sizeof(class_perm_node_t)); cpn->tclass = sepol_class->s.value; cpn->data = data; cpn->next = *sepol_class_perms; *sepol_class_perms = cpn; } else { /* MAP */ struct cil_list_item *j = NULL; cil_list_for_each(j, cp->perms) { struct cil_perm *cmp = j->data; rc = __cil_rule_to_sepol_class_perms(pdb, cmp->classperms, sepol_class_perms); if (rc != SEPOL_OK) { goto exit; } } } } else { /* SET */ struct cil_classperms_set *cp_set = i->data; struct cil_classpermission *cp = cp_set->set; rc = __cil_rule_to_sepol_class_perms(pdb, cp->classperms, sepol_class_perms); if (rc != SEPOL_OK) { goto exit; } } } return SEPOL_OK; exit: return rc; } static int __cil_permx_to_sepol_class_perms(policydb_t *pdb, struct cil_permissionx *permx, class_perm_node_t **sepol_class_perms) { int rc = SEPOL_OK; struct cil_list *class_list = NULL; struct cil_list_item *c; class_datum_t *sepol_obj = NULL; class_perm_node_t *cpn; uint32_t data = 0; char *perm_str = NULL; class_list = cil_expand_class(permx->obj); cil_list_for_each(c, class_list) { rc = __cil_get_sepol_class_datum(pdb, DATUM(c->data), &sepol_obj); if (rc != SEPOL_OK) { goto exit; } switch (permx->kind) { case CIL_PERMX_KIND_IOCTL: perm_str = CIL_KEY_IOCTL; break; default: rc = SEPOL_ERR; goto exit; } rc = __perm_str_to_datum(perm_str, sepol_obj, &data); if (rc != SEPOL_OK) { goto exit; } cpn = cil_malloc(sizeof(*cpn)); cpn->tclass = sepol_obj->s.value; cpn->data = data; cpn->next = *sepol_class_perms; *sepol_class_perms = cpn; } exit: cil_list_destroy(&class_list, CIL_FALSE); return rc; } static void __cil_init_sepol_type_set(type_set_t *t) { ebitmap_init(&t->types); ebitmap_init(&t->negset); t->flags = 0; } static int __cil_add_sepol_type(policydb_t *pdb, const struct cil_db *db, struct cil_symtab_datum *datum, ebitmap_t *map) { int rc = SEPOL_ERR; struct cil_tree_node *n = datum->nodes->head->data; type_datum_t *sepol_datum = NULL; if (n->flavor == CIL_TYPEATTRIBUTE) { ebitmap_node_t *tnode; unsigned int i; struct cil_typeattribute *attr = (struct cil_typeattribute *)datum; ebitmap_for_each_bit(attr->types, tnode, i) { if (!ebitmap_get_bit(attr->types, i)) continue; datum = DATUM(db->val_to_type[i]); rc = __cil_get_sepol_type_datum(pdb, datum, &sepol_datum); if (rc != SEPOL_OK) goto exit; ebitmap_set_bit(map, sepol_datum->s.value - 1, 1); } } else { rc = __cil_get_sepol_type_datum(pdb, datum, &sepol_datum); if (rc != SEPOL_OK) goto exit; ebitmap_set_bit(map, sepol_datum->s.value - 1, 1); } return SEPOL_OK; exit: return rc; } static avrule_t *__cil_init_sepol_avrule(uint32_t kind, struct cil_tree_node *node) { avrule_t *avrule; struct cil_tree_node *source_node; char *source_path; int is_cil; avrule = cil_malloc(sizeof(avrule_t)); avrule->specified = kind; avrule->flags = 0; __cil_init_sepol_type_set(&avrule->stypes); __cil_init_sepol_type_set(&avrule->ttypes); avrule->perms = NULL; avrule->line = node->line; avrule->source_filename = NULL; avrule->source_line = node->line; source_node = cil_tree_get_next_path(node, &source_path, &is_cil); if (source_node) { avrule->source_filename = source_path; if (!is_cil) { avrule->source_line = node->hll_line; } } avrule->next = NULL; return avrule; } static void __cil_destroy_sepol_avrules(avrule_t *curr) { avrule_t *next; while (curr) { next = curr->next; ebitmap_destroy(&curr->stypes.types); ebitmap_destroy(&curr->stypes.negset); ebitmap_destroy(&curr->ttypes.types); ebitmap_destroy(&curr->ttypes.negset); __cil_destroy_sepol_class_perms(curr->perms); free(curr); curr = next; } } static void __cil_print_parents(const char *pad, struct cil_tree_node *n) { if (!n) return; __cil_print_parents(pad, n->parent); if (n->flavor != CIL_SRC_INFO) { cil_tree_log(n, CIL_ERR,"%s%s", pad, cil_node_to_string(n)); } } static void __cil_print_classperm(struct cil_list *cp_list) { struct cil_list_item *i1, *i2; i1 = cp_list->head; if (i1->flavor == CIL_CLASSPERMS) { struct cil_classperms *cp = i1->data; cil_log(CIL_ERR,"(%s (", DATUM(cp->class)->fqn); cil_list_for_each(i2, cp->perms) { cil_log(CIL_ERR,"%s",DATUM(i2->data)->fqn); if (i2 != cp->perms->tail) { cil_log(CIL_ERR," "); } else { cil_log(CIL_ERR,"))"); } } } else { struct cil_classperms_set *cp_set = i1->data; cil_log(CIL_ERR,"%s", DATUM(cp_set->set)->fqn); } } static void __cil_print_permissionx(struct cil_permissionx *px) { const char *kind_str = ""; char *expr_str; switch (px->kind) { case CIL_PERMX_KIND_IOCTL: kind_str = CIL_KEY_IOCTL; break; default: kind_str = "unknown"; break; } __cil_expr_to_string(px->expr_str, CIL_PERMISSIONX, &expr_str); cil_log(CIL_ERR, "%s %s (%s)", kind_str, DATUM(px->obj)->fqn, expr_str); free(expr_str); } static void __cil_print_rule(const char *pad, const char *kind, struct cil_avrule *avrule) { cil_log(CIL_ERR,"%s(%s ", pad, kind); cil_log(CIL_ERR,"%s %s ", DATUM(avrule->src)->fqn, DATUM(avrule->tgt)->fqn); if (!avrule->is_extended) { __cil_print_classperm(avrule->perms.classperms); } else { cil_log(CIL_ERR, "("); __cil_print_permissionx(avrule->perms.x.permx); cil_log(CIL_ERR, ")"); } cil_log(CIL_ERR,")\n"); } static int __cil_print_neverallow_failure(const struct cil_db *db, struct cil_tree_node *node) { int rc; struct cil_list_item *i2; struct cil_list *matching; struct cil_avrule *cil_rule = node->data; struct cil_avrule target; struct cil_tree_node *n2; struct cil_avrule *r2; char *neverallow_str; char *allow_str; enum cil_flavor avrule_flavor; target.rule_kind = CIL_AVRULE_ALLOWED; target.is_extended = cil_rule->is_extended; target.src = cil_rule->src; target.tgt = cil_rule->tgt; target.perms = cil_rule->perms; if (!cil_rule->is_extended) { neverallow_str = CIL_KEY_NEVERALLOW; allow_str = CIL_KEY_ALLOW; avrule_flavor = CIL_AVRULE; } else { neverallow_str = CIL_KEY_NEVERALLOWX; allow_str = CIL_KEY_ALLOWX; avrule_flavor = CIL_AVRULEX; } cil_tree_log(node, CIL_ERR, "%s check failed", neverallow_str); __cil_print_rule(" ", neverallow_str, cil_rule); cil_list_init(&matching, CIL_NODE); rc = cil_find_matching_avrule_in_ast(db->ast->root, avrule_flavor, &target, matching, CIL_FALSE); if (rc) { cil_log(CIL_ERR, "Error occurred while checking %s rules\n", neverallow_str); cil_list_destroy(&matching, CIL_FALSE); goto exit; } cil_list_for_each(i2, matching) { n2 = i2->data; r2 = n2->data; __cil_print_parents(" ", n2); __cil_print_rule(" ", allow_str, r2); } cil_log(CIL_ERR,"\n"); cil_list_destroy(&matching, CIL_FALSE); exit: return rc; } static int cil_check_neverallow(const struct cil_db *db, policydb_t *pdb, struct cil_tree_node *node, int *violation) { int rc = SEPOL_OK; struct cil_avrule *cil_rule = node->data; struct cil_symtab_datum *tgt = cil_rule->tgt; uint32_t kind; avrule_t *rule; struct cil_list *xperms = NULL; struct cil_list_item *item; if (!cil_rule->is_extended) { kind = AVRULE_NEVERALLOW; } else { kind = AVRULE_XPERMS_NEVERALLOW; } rule = __cil_init_sepol_avrule(kind, node); rule->next = NULL; rc = __cil_add_sepol_type(pdb, db, cil_rule->src, &rule->stypes.types); if (rc != SEPOL_OK) { goto exit; } if (tgt->fqn == CIL_KEY_SELF) { rule->flags = RULE_SELF; } else { rc = __cil_add_sepol_type(pdb, db, cil_rule->tgt, &rule->ttypes.types); if (rc != SEPOL_OK) { goto exit; } } if (!cil_rule->is_extended) { rc = __cil_rule_to_sepol_class_perms(pdb, cil_rule->perms.classperms, &rule->perms); if (rc != SEPOL_OK) { goto exit; } rc = check_assertion(pdb, rule); if (rc == CIL_TRUE) { *violation = CIL_TRUE; rc = __cil_print_neverallow_failure(db, node); if (rc != SEPOL_OK) { goto exit; } } } else { rc = __cil_permx_to_sepol_class_perms(pdb, cil_rule->perms.x.permx, &rule->perms); if (rc != SEPOL_OK) { goto exit; } rc = __cil_permx_bitmap_to_sepol_xperms_list(cil_rule->perms.x.permx->perms, &xperms); if (rc != SEPOL_OK) { goto exit; } cil_list_for_each(item, xperms) { rule->xperms = item->data; rc = check_assertion(pdb, rule); if (rc == CIL_TRUE) { *violation = CIL_TRUE; rc = __cil_print_neverallow_failure(db, node); if (rc != SEPOL_OK) { goto exit; } } } } exit: if (xperms != NULL) { cil_list_for_each(item, xperms) { free(item->data); item->data = NULL; } cil_list_destroy(&xperms, CIL_FALSE); } rule->xperms = NULL; __cil_destroy_sepol_avrules(rule); return rc; } static int cil_check_neverallows(const struct cil_db *db, policydb_t *pdb, struct cil_list *neverallows, int *violation) { int rc = SEPOL_OK; struct cil_list_item *item; cil_list_for_each(item, neverallows) { rc = cil_check_neverallow(db, pdb, item->data, violation); if (rc != SEPOL_OK) { goto exit; } } exit: return rc; } static struct cil_list *cil_classperms_from_sepol(policydb_t *pdb, uint16_t class, uint32_t data, struct cil_class *class_value_to_cil[], struct cil_perm **perm_value_to_cil[]) { struct cil_classperms *cp; struct cil_list *cp_list; class_datum_t *sepol_class = pdb->class_val_to_struct[class - 1]; unsigned i; cil_classperms_init(&cp); cp->class = class_value_to_cil[class]; if (!cp->class) goto exit; cil_list_init(&cp->perms, CIL_PERM); for (i = 0; i < sepol_class->permissions.nprim; i++) { struct cil_perm *perm; if ((data & (1 << i)) == 0) continue; perm = perm_value_to_cil[class][i+1]; if (!perm) goto exit; cil_list_append(cp->perms, CIL_PERM, perm); } cil_list_init(&cp_list, CIL_CLASSPERMS); cil_list_append(cp_list, CIL_CLASSPERMS, cp); return cp_list; exit: cil_destroy_classperms(cp); cil_log(CIL_ERR,"Failed to create CIL class-permissions from sepol values\n"); return NULL; } static int cil_avrule_from_sepol(policydb_t *pdb, avtab_ptr_t sepol_rule, struct cil_avrule *cil_rule, void *type_value_to_cil[], struct cil_class *class_value_to_cil[], struct cil_perm **perm_value_to_cil[]) { int rc = SEPOL_ERR; avtab_key_t *k = &sepol_rule->key; avtab_datum_t *d = &sepol_rule->datum; cil_rule->src = type_value_to_cil[k->source_type]; if (!cil_rule->src) goto exit; cil_rule->tgt = type_value_to_cil[k->target_type]; if (!cil_rule->tgt) goto exit; cil_rule->perms.classperms = cil_classperms_from_sepol(pdb, k->target_class, d->data, class_value_to_cil, perm_value_to_cil); if (!cil_rule->perms.classperms) goto exit; return SEPOL_OK; exit: cil_log(CIL_ERR,"Failed to create CIL AV rule from sepol values\n"); return rc; } static int cil_check_type_bounds(const struct cil_db *db, policydb_t *pdb, void *type_value_to_cil, struct cil_class *class_value_to_cil[], struct cil_perm **perm_value_to_cil[], int *violation) { int rc = SEPOL_OK; int i; for (i = 0; i < db->num_types; i++) { type_datum_t *child; type_datum_t *parent; avtab_ptr_t bad = NULL; int numbad = 0; struct cil_type *t = db->val_to_type[i]; if (!t->bounds) continue; rc = __cil_get_sepol_type_datum(pdb, DATUM(t), &child); if (rc != SEPOL_OK) goto exit; rc = __cil_get_sepol_type_datum(pdb, DATUM(t->bounds), &parent); if (rc != SEPOL_OK) goto exit; rc = bounds_check_type(NULL, pdb, child->s.value, parent->s.value, &bad, &numbad); if (rc != SEPOL_OK) goto exit; if (bad) { avtab_ptr_t cur; struct cil_avrule target; struct cil_tree_node *n1 = NULL; *violation = CIL_TRUE; target.is_extended = 0; target.rule_kind = CIL_AVRULE_ALLOWED; target.src_str = NULL; target.tgt_str = NULL; cil_log(CIL_ERR, "Child type %s exceeds bounds of parent %s\n", t->datum.fqn, t->bounds->datum.fqn); for (cur = bad; cur; cur = cur->next) { struct cil_list_item *i2; struct cil_list *matching; rc = cil_avrule_from_sepol(pdb, cur, &target, type_value_to_cil, class_value_to_cil, perm_value_to_cil); if (rc != SEPOL_OK) { cil_log(CIL_ERR, "Failed to convert sepol avrule to CIL\n"); goto exit; } __cil_print_rule(" ", "allow", &target); cil_list_init(&matching, CIL_NODE); rc = cil_find_matching_avrule_in_ast(db->ast->root, CIL_AVRULE, &target, matching, CIL_TRUE); if (rc) { cil_log(CIL_ERR, "Error occurred while checking type bounds\n"); cil_list_destroy(&matching, CIL_FALSE); cil_list_destroy(&target.perms.classperms, CIL_TRUE); bounds_destroy_bad(bad); goto exit; } cil_list_for_each(i2, matching) { struct cil_tree_node *n2 = i2->data; struct cil_avrule *r2 = n2->data; if (n1 == n2) { cil_log(CIL_ERR, " \n"); } else { n1 = n2; __cil_print_parents(" ", n2); __cil_print_rule(" ", "allow", r2); } } cil_list_destroy(&matching, CIL_FALSE); cil_list_destroy(&target.perms.classperms, CIL_TRUE); } bounds_destroy_bad(bad); } } exit: return rc; } // assumes policydb is already allocated and initialized properly with things // like policy type set to kernel and version set appropriately int cil_binary_create_allocated_pdb(const struct cil_db *db, sepol_policydb_t *policydb) { int rc = SEPOL_ERR; int i; struct cil_args_binary extra_args; policydb_t *pdb = &policydb->p; struct cil_list *neverallows = NULL; hashtab_t filename_trans_table = NULL; hashtab_t range_trans_table = NULL; hashtab_t role_trans_table = NULL; hashtab_t avrulex_ioctl_table = NULL; void **type_value_to_cil = NULL; struct cil_class **class_value_to_cil = NULL; struct cil_perm ***perm_value_to_cil = NULL; if (db == NULL || policydb == NULL) { if (db == NULL) { cil_log(CIL_ERR,"db == NULL\n"); } else if (policydb == NULL) { cil_log(CIL_ERR,"policydb == NULL\n"); } return SEPOL_ERR; } /* libsepol values start at 1. Just allocate extra memory rather than * subtract 1 from the sepol value. */ type_value_to_cil = calloc(db->num_types_and_attrs+1, sizeof(*type_value_to_cil)); if (!type_value_to_cil) goto exit; class_value_to_cil = calloc(db->num_classes+1, sizeof(*class_value_to_cil)); if (!class_value_to_cil) goto exit; perm_value_to_cil = calloc(db->num_classes+1, sizeof(*perm_value_to_cil)); if (!perm_value_to_cil) goto exit; for (i=1; i < db->num_classes+1; i++) { perm_value_to_cil[i] = calloc(PERMS_PER_CLASS+1, sizeof(*perm_value_to_cil[i])); if (!perm_value_to_cil[i]) goto exit; } rc = __cil_policydb_init(pdb, db, class_value_to_cil, perm_value_to_cil); if (rc != SEPOL_OK) { cil_log(CIL_ERR,"Problem in policydb_init\n"); goto exit; } filename_trans_table = hashtab_create(filename_trans_hash, filename_trans_compare, FILENAME_TRANS_TABLE_SIZE); if (!filename_trans_table) { cil_log(CIL_INFO, "Failure to create hashtab for filename_trans\n"); goto exit; } range_trans_table = hashtab_create(range_trans_hash, range_trans_compare, RANGE_TRANS_TABLE_SIZE); if (!range_trans_table) { cil_log(CIL_INFO, "Failure to create hashtab for range_trans\n"); goto exit; } role_trans_table = hashtab_create(role_trans_hash, role_trans_compare, ROLE_TRANS_TABLE_SIZE); if (!role_trans_table) { cil_log(CIL_INFO, "Failure to create hashtab for role_trans\n"); goto exit; } avrulex_ioctl_table = hashtab_create(avrulex_hash, avrulex_compare, AVRULEX_TABLE_SIZE); if (!avrulex_ioctl_table) { cil_log(CIL_INFO, "Failure to create hashtab for avrulex\n"); goto exit; } cil_list_init(&neverallows, CIL_LIST_ITEM); extra_args.db = db; extra_args.pdb = pdb; extra_args.neverallows = neverallows; extra_args.filename_trans_table = filename_trans_table; extra_args.range_trans_table = range_trans_table; extra_args.role_trans_table = role_trans_table; extra_args.avrulex_ioctl_table = avrulex_ioctl_table; extra_args.type_value_to_cil = type_value_to_cil; for (i = 1; i <= 3; i++) { extra_args.pass = i; rc = cil_tree_walk(db->ast->root, __cil_binary_create_helper, NULL, NULL, &extra_args); if (rc != SEPOL_OK) { cil_log(CIL_INFO, "Failure while walking cil database\n"); goto exit; } if (i == 1) { rc = __cil_policydb_val_arrays_create(pdb); if (rc != SEPOL_OK) { cil_log(CIL_INFO, "Failure creating val_to_{struct,name} arrays\n"); goto exit; } } if (i == 3) { rc = hashtab_map(avrulex_ioctl_table, __cil_avrulex_ioctl_to_policydb, pdb); if (rc != SEPOL_OK) { cil_log(CIL_INFO, "Failure creating avrulex rules\n"); goto exit; } } } rc = cil_sidorder_to_policydb(pdb, db); if (rc != SEPOL_OK) { goto exit; } rc = __cil_contexts_to_policydb(pdb, db); if (rc != SEPOL_OK) { cil_log(CIL_INFO, "Failure while inserting cil contexts into sepol policydb\n"); goto exit; } if (pdb->type_attr_map == NULL) { rc = __cil_typeattr_bitmap_init(pdb); if (rc != SEPOL_OK) { cil_log(CIL_INFO, "Failure while initializing typeattribute bitmap\n"); goto exit; } } cond_optimize_lists(pdb->cond_list); __cil_set_conditional_state_and_flags(pdb); if (db->disable_neverallow != CIL_TRUE) { int violation = CIL_FALSE; cil_log(CIL_INFO, "Checking Neverallows\n"); rc = cil_check_neverallows(db, pdb, neverallows, &violation); if (rc != SEPOL_OK) goto exit; cil_log(CIL_INFO, "Checking User Bounds\n"); rc = bounds_check_users(NULL, pdb); if (rc) { violation = CIL_TRUE; } cil_log(CIL_INFO, "Checking Role Bounds\n"); rc = bounds_check_roles(NULL, pdb); if (rc) { violation = CIL_TRUE; } cil_log(CIL_INFO, "Checking Type Bounds\n"); rc = cil_check_type_bounds(db, pdb, type_value_to_cil, class_value_to_cil, perm_value_to_cil, &violation); if (rc != SEPOL_OK) goto exit; if (violation == CIL_TRUE) { rc = SEPOL_ERR; goto exit; } } /* This pre-expands the roles and users for context validity checking */ if (hashtab_map(pdb->p_roles.table, policydb_role_cache, pdb)) { cil_log(CIL_INFO, "Failure creating roles cache"); rc = SEPOL_ERR; goto exit; } if (hashtab_map(pdb->p_users.table, policydb_user_cache, pdb)) { cil_log(CIL_INFO, "Failure creating users cache"); rc = SEPOL_ERR; goto exit; } rc = SEPOL_OK; exit: hashtab_destroy(filename_trans_table); hashtab_destroy(range_trans_table); hashtab_destroy(role_trans_table); hashtab_destroy(avrulex_ioctl_table); free(type_value_to_cil); free(class_value_to_cil); /* Range is because libsepol values start at 1. */ for (i=1; i < db->num_classes+1; i++) { free(perm_value_to_cil[i]); } free(perm_value_to_cil); cil_list_destroy(&neverallows, CIL_FALSE); return rc; }