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Diffstat (limited to 'sechecker/modules/find_file_types.c')
-rw-r--r--sechecker/modules/find_file_types.c636
1 files changed, 636 insertions, 0 deletions
diff --git a/sechecker/modules/find_file_types.c b/sechecker/modules/find_file_types.c
new file mode 100644
index 0000000..193e3f3
--- /dev/null
+++ b/sechecker/modules/find_file_types.c
@@ -0,0 +1,636 @@
+/**
+ * @file
+ * Implementation of the find file types utility module.
+ *
+ * @author Kevin Carr kcarr@tresys.com
+ * @author Jeremy A. Mowery jmowery@tresys.com
+ * @author Jason Tang jtang@tresys.com
+ * @author Randy Wicks rwicks@tresys.com
+ *
+ * Copyright (C) 2005-2007 Tresys Technology, LLC
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; either version 2 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, write to the Free Software
+ * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
+ */
+
+#include "find_file_types.h"
+
+#include <qpol/genfscon_query.h>
+
+#include <stdio.h>
+#include <string.h>
+#include <unistd.h>
+#include <errno.h>
+
+static const char *const mod_name = "find_file_types";
+
+int find_file_types_register(sechk_lib_t * lib)
+{
+ sechk_module_t *mod = NULL;
+ sechk_fn_t *fn_struct = NULL;
+ sechk_name_value_t *nv = NULL;
+
+ if (!lib) {
+ ERR(NULL, "%s", "No library");
+ errno = EINVAL;
+ return -1;
+ }
+
+ mod = sechk_lib_get_module(mod_name, lib);
+ if (!mod) {
+ ERR(NULL, "%s", "Module unknown");
+ errno = EINVAL;
+ return -1;
+ }
+ mod->parent_lib = lib;
+
+ /* assign the descriptions */
+
+ mod->brief_description = "utility module";
+ mod->detailed_description =
+ "--------------------------------------------------------------------------------\n"
+ "This module finds all types in the policy treated as a file type. A type is \n"
+ "considered a file type if any of the following is true:\n"
+ "\n"
+ " 1) it has an attribute associated with file types\n"
+ " 2) it is the source of a rule to allow filesystem associate permission\n"
+ " 3) it is the default type of a type transition rule with an object class\n" " other than process\n"
+ " 4) it is specified in a context in the file_contexts file\n";
+ mod->opt_description = "Module requirements:\n" " attribute names\n"
+ " file_contexts\n"
+ "Module dependencies:\n" " none\n" "Module options:\n" " file_type_attribute can be modified in a profile\n";
+ mod->severity = SECHK_SEV_NONE;
+ /* assign requirements */
+ nv = sechk_name_value_new(SECHK_REQ_POLICY_CAP, SECHK_REQ_CAP_ATTRIB_NAMES);
+ apol_vector_append(mod->requirements, (void *)nv);
+ nv = sechk_name_value_new(SECHK_REQ_FILE_CONTEXTS, NULL);
+ apol_vector_append(mod->requirements, (void *)nv);
+
+ /* assign options */
+ nv = sechk_name_value_new("file_type_attribute", "file_type");
+ apol_vector_append(mod->options, (void *)nv);
+
+ /* register functions */
+ fn_struct = sechk_fn_new();
+ if (!fn_struct) {
+ ERR(NULL, "%s", strerror(ENOMEM));
+ errno = ENOMEM;
+ return -1;
+ }
+ fn_struct->name = strdup(SECHK_MOD_FN_INIT);
+ if (!fn_struct->name) {
+ ERR(NULL, "%s", strerror(ENOMEM));
+ errno = ENOMEM;
+ return -1;
+ }
+ fn_struct->fn = find_file_types_init;
+ apol_vector_append(mod->functions, (void *)fn_struct);
+
+ fn_struct = sechk_fn_new();
+ if (!fn_struct) {
+ ERR(NULL, "%s", strerror(ENOMEM));
+ errno = ENOMEM;
+ return -1;
+ }
+ fn_struct->name = strdup(SECHK_MOD_FN_RUN);
+ if (!fn_struct->name) {
+ ERR(NULL, "%s", strerror(ENOMEM));
+ errno = ENOMEM;
+ return -1;
+ }
+ fn_struct->fn = find_file_types_run;
+ apol_vector_append(mod->functions, (void *)fn_struct);
+
+ mod->data_free = find_file_types_data_free;
+
+ fn_struct = sechk_fn_new();
+ if (!fn_struct) {
+ ERR(NULL, "%s", strerror(ENOMEM));
+ errno = ENOMEM;
+ return -1;
+ }
+ fn_struct->name = strdup(SECHK_MOD_FN_PRINT);
+ if (!fn_struct->name) {
+ ERR(NULL, "%s", strerror(ENOMEM));
+ errno = ENOMEM;
+ return -1;
+ }
+ fn_struct->fn = find_file_types_print;
+ apol_vector_append(mod->functions, (void *)fn_struct);
+
+ fn_struct = sechk_fn_new();
+ if (!fn_struct) {
+ ERR(NULL, "%s", strerror(ENOMEM));
+ errno = ENOMEM;
+ return -1;
+ }
+ fn_struct->name = strdup("get_list");
+ if (!fn_struct->name) {
+ ERR(NULL, "%s", strerror(ENOMEM));
+ errno = ENOMEM;
+ return -1;
+ }
+ fn_struct->fn = find_file_types_get_list;
+ apol_vector_append(mod->functions, (void *)fn_struct);
+
+ return 0;
+}
+
+int find_file_types_init(sechk_module_t * mod, apol_policy_t * policy, void *arg __attribute__ ((unused)))
+{
+ sechk_name_value_t *opt = NULL;
+ find_file_types_data_t *datum = NULL;
+ apol_vector_t *attr_vector = NULL;
+ apol_attr_query_t *attr_query = apol_attr_query_create();
+ qpol_type_t *attr = NULL;
+ qpol_policy_t *q = apol_policy_get_qpol(policy);
+ size_t i = 0, j = 0;
+
+ if (!mod || !policy) {
+ ERR(policy, "%s", "Invalid parameters");
+ errno = EINVAL;
+ return -1;
+ }
+ if (strcmp(mod_name, mod->name)) {
+ ERR(policy, "Wrong module (%s)", mod->name);
+ errno = EINVAL;
+ return -1;
+ }
+
+ datum = find_file_types_data_new();
+ if (!datum) {
+ ERR(policy, "%s", strerror(ENOMEM));
+ errno = ENOMEM;
+ return -1;
+ }
+ if (!(datum->file_type_attribs = apol_vector_create(NULL))) {
+ ERR(policy, "%s", strerror(ENOMEM));
+ errno = ENOMEM;
+ return -1;
+ }
+ mod->data = datum;
+
+ for (i = 0; i < apol_vector_get_size(mod->options); i++) {
+ opt = apol_vector_get_element(mod->options, i);
+ if (!strcmp(opt->name, "file_type_attribute")) {
+ apol_attr_query_set_attr(policy, attr_query, opt->value);
+ apol_attr_get_by_query(policy, attr_query, &attr_vector);
+ for (j = 0; j < apol_vector_get_size(attr_vector); j++) {
+ const char *file_attrib;
+ attr = apol_vector_get_element(attr_vector, j);
+ qpol_type_get_name(q, attr, &file_attrib);
+ if (apol_vector_append(datum->file_type_attribs, (void *)file_attrib) < 0) {
+ ERR(policy, "%s", strerror(ENOMEM));
+ errno = ENOMEM;
+ return -1;
+ }
+ }
+ apol_vector_destroy(&attr_vector);
+ }
+ }
+ apol_attr_query_destroy(&attr_query);
+ return 0;
+}
+
+int find_file_types_run(sechk_module_t * mod, apol_policy_t * policy, void *arg __attribute__ ((unused)))
+{
+ find_file_types_data_t *datum;
+ sechk_item_t *item = NULL;
+ sechk_proof_t *proof = NULL;
+ sechk_result_t *res = NULL;
+ const char *type_name = NULL;
+ apol_avrule_query_t *avrule_query = NULL;
+ apol_terule_query_t *terule_query = NULL;
+ apol_vector_t *avrule_vector = NULL;
+ apol_vector_t *terule_vector = NULL;
+ qpol_policy_t *q = apol_policy_get_qpol(policy);
+ size_t i, j, x;
+ char *buff = NULL;
+ int error = 0;
+
+ /* NEW */
+ size_t num_fc_entries = 0;
+ apol_vector_t *type_vector = NULL;
+ apol_vector_t *fc_entry_vector = NULL;
+
+ if (!mod || !policy) {
+ ERR(policy, "%s", "Invalid parameters");
+ errno = EINVAL;
+ return -1;
+ }
+ if (strcmp(mod_name, mod->name)) {
+ ERR(policy, "Wrong module (%s)", mod->name);
+ errno = EINVAL;
+ return -1;
+ }
+
+ /* if already run return */
+ if (mod->result)
+ return 0;
+
+ res = sechk_result_new();
+ if (!res) {
+ ERR(policy, "%s", strerror(ENOMEM));
+ errno = ENOMEM;
+ return -1;
+ }
+
+ datum = (find_file_types_data_t *) mod->data;
+ res->item_type = SECHK_ITEM_TYPE;
+ res->test_name = strdup(mod_name);
+ if (!res->test_name) {
+ error = errno;
+ ERR(policy, "%s", strerror(ENOMEM));
+ goto find_file_types_run_fail;
+ }
+ if (!(res->items = apol_vector_create(sechk_item_free))) {
+ error = errno;
+ ERR(policy, "%s", strerror(ENOMEM));
+ goto find_file_types_run_fail;
+ }
+ if (mod->parent_lib->fc_entries) {
+ if (mod->parent_lib->fc_path) {
+ fc_entry_vector = mod->parent_lib->fc_entries;
+ num_fc_entries = apol_vector_get_size(fc_entry_vector);
+ } else {
+ error = ENOENT;
+ ERR(policy, "%s", "Unable to find file contexts file");
+ goto find_file_types_run_fail;
+ }
+ }
+
+ /* Get an iterator for the types */
+ if (apol_type_get_by_query(policy, NULL, &type_vector) < 0) {
+ error = errno;
+ ERR(policy, "%s", "Unable to retrieve types");
+ return -1;
+ }
+
+ for (i = 0; i < apol_vector_get_size(type_vector); i++) {
+ qpol_iterator_t *file_attr_iter;
+
+ const qpol_type_t *type = apol_vector_get_element(type_vector, i);
+ qpol_type_get_name(q, type, &type_name);
+
+ if (qpol_type_get_attr_iter(q, type, &file_attr_iter) < 0) {
+ error = errno;
+ ERR(policy, "Could not get attributes for %s\n", type_name);
+ goto find_file_types_run_fail;
+ }
+
+ for (; !qpol_iterator_end(file_attr_iter); qpol_iterator_next(file_attr_iter)) {
+ const char *attr_name;
+ const qpol_type_t *attr;
+ size_t nfta;
+
+ qpol_iterator_get_item(file_attr_iter, (void **)&attr);
+ qpol_type_get_name(q, attr, &attr_name);
+ for (nfta = 0; nfta < apol_vector_get_size(datum->file_type_attribs); nfta++) {
+ const char *file_type_attrib;
+
+ file_type_attrib = apol_vector_get_element(datum->file_type_attribs, nfta);
+ if (!strcmp(attr_name, file_type_attrib)) {
+ proof = sechk_proof_new(NULL);
+ if (!proof) {
+ error = errno;
+ ERR(policy, "%s", strerror(ENOMEM));
+ goto find_file_types_run_fail;
+ }
+ proof->type = SECHK_ITEM_ATTRIB;
+ proof->elem = (void *)attr;
+ asprintf(&proof->text, "has attribute %s", attr_name);
+ if (!item) {
+ item = sechk_item_new(NULL);
+ if (!item) {
+ error = errno;
+ ERR(policy, "%s", strerror(ENOMEM));
+ goto find_file_types_run_fail;
+ }
+ item->test_result = 1;
+ }
+ if (!item->proof) {
+ if (!(item->proof = apol_vector_create(sechk_proof_free))) {
+ error = errno;
+ ERR(policy, "%s", strerror(ENOMEM));
+ goto find_file_types_run_fail;
+ }
+ }
+ if (apol_vector_append(item->proof, (void *)proof) < 0) {
+ error = errno;
+ ERR(policy, "%s", strerror(ENOMEM));
+ goto find_file_types_run_fail;
+ }
+ }
+ }
+ }
+ qpol_iterator_destroy(&file_attr_iter);
+
+ /* rule src check filesystem associate */
+ if (!(avrule_query = apol_avrule_query_create())) {
+ error = errno;
+ ERR(policy, "%s", "Could not retrieve AV rules");
+ goto find_file_types_run_fail;
+ }
+ apol_avrule_query_set_source(policy, avrule_query, type_name, 0);
+ apol_avrule_query_append_class(policy, avrule_query, "filesystem");
+ apol_avrule_query_append_perm(policy, avrule_query, "associate");
+ apol_avrule_get_by_query(policy, avrule_query, &avrule_vector);
+ for (x = 0; x < apol_vector_get_size(avrule_vector); x++) {
+ qpol_avrule_t *avrule;
+ avrule = apol_vector_get_element(avrule_vector, x);
+ if (avrule) {
+ proof = sechk_proof_new(NULL);
+ if (!proof) {
+ error = errno;
+ ERR(policy, "%s", strerror(ENOMEM));
+ goto find_file_types_run_fail;
+ }
+ proof->type = SECHK_ITEM_AVRULE;
+ proof->elem = avrule;
+ proof->text = apol_avrule_render(policy, avrule);
+ if (!item) {
+ item = sechk_item_new(NULL);
+ if (!item) {
+ error = errno;
+ ERR(policy, "%s", strerror(ENOMEM));
+ goto find_file_types_run_fail;
+ }
+ item->test_result = 1;
+ }
+ if (!item->proof) {
+ if (!(item->proof = apol_vector_create(sechk_proof_free))) {
+ error = errno;
+ ERR(policy, "%s", strerror(ENOMEM));
+ goto find_file_types_run_fail;
+ }
+ }
+ item->test_result = 1;
+ if (apol_vector_append(item->proof, (void *)proof) < 0) {
+ error = errno;
+ ERR(policy, "%s", strerror(ENOMEM));
+ goto find_file_types_run_fail;
+ }
+ }
+ }
+ apol_vector_destroy(&avrule_vector);
+ apol_avrule_query_destroy(&avrule_query);
+
+ /* type rule check file object */
+ if (!(terule_query = apol_terule_query_create())) {
+ error = errno;
+ ERR(policy, "%s", "Could not retrieve TE rules");
+ goto find_file_types_run_fail;
+ }
+ apol_terule_query_set_default(policy, terule_query, type_name);
+ apol_terule_get_by_query(policy, terule_query, &terule_vector);
+ for (x = 0; x < apol_vector_get_size(terule_vector); x++) {
+ const qpol_terule_t *terule;
+ const qpol_class_t *objclass;
+ const char *class_name;
+
+ terule = apol_vector_get_element(terule_vector, x);
+ qpol_terule_get_object_class(q, terule, &objclass);
+ qpol_class_get_name(q, objclass, &class_name);
+ if (strcmp(class_name, "process")) {
+ proof = sechk_proof_new(NULL);
+ if (!proof) {
+ error = errno;
+ ERR(policy, "%s", strerror(ENOMEM));
+ goto find_file_types_run_fail;
+ }
+ proof->type = SECHK_ITEM_TERULE;
+ proof->elem = (void *)terule;
+ proof->text = apol_terule_render(policy, terule);
+ if (!item) {
+ item = sechk_item_new(NULL);
+ if (!item) {
+ error = errno;
+ ERR(policy, "%s", strerror(ENOMEM));
+ goto find_file_types_run_fail;
+ }
+ item->test_result = 1;
+ }
+ if (!item->proof) {
+ if (!(item->proof = apol_vector_create(sechk_proof_free))) {
+ error = errno;
+ ERR(policy, "%s", strerror(ENOMEM));
+ goto find_file_types_run_fail;
+ }
+ }
+ item->test_result = 1;
+ if (apol_vector_append(item->proof, (void *)proof) < 0) {
+ error = errno;
+ ERR(policy, "%s", strerror(ENOMEM));
+ goto find_file_types_run_fail;
+ }
+ }
+ }
+ apol_vector_destroy(&terule_vector);
+ apol_terule_query_destroy(&terule_query);
+
+ /* assigned in fc check */
+ if (fc_entry_vector) {
+ buff = NULL;
+ for (j = 0; j < num_fc_entries; j++) {
+ sefs_entry_t *fc_entry;
+ const char *fc_type_name = NULL;
+ fc_entry = apol_vector_get_element(fc_entry_vector, j);
+ const apol_context_t *context = sefs_entry_get_context(fc_entry);
+ if (!context)
+ continue;
+ fc_type_name = apol_context_get_type(context);
+ if (!strcmp(type_name, fc_type_name)) {
+ buff = sefs_entry_to_string(fc_entry);
+ proof = sechk_proof_new(NULL);
+ if (!proof) {
+ error = errno;
+ ERR(policy, "%s", strerror(ENOMEM));
+ goto find_file_types_run_fail;
+ }
+ proof->type = SECHK_ITEM_FCENT;
+ proof->elem = fc_entry;
+ proof->text = buff;
+ buff = NULL;
+ if (!item) {
+ item = sechk_item_new(NULL);
+ if (!item) {
+ error = errno;
+ ERR(policy, "%s", strerror(ENOMEM));
+ goto find_file_types_run_fail;
+ }
+ item->test_result = 1;
+ }
+ if (!item->proof) {
+ if (!(item->proof = apol_vector_create(sechk_proof_free))) {
+ error = errno;
+ ERR(policy, "%s", strerror(ENOMEM));
+ goto find_file_types_run_fail;
+ }
+ }
+ if (apol_vector_append(item->proof, (void *)proof) < 0) {
+ error = errno;
+ ERR(policy, "%s", strerror(ENOMEM));
+ goto find_file_types_run_fail;
+ }
+ }
+ }
+ }
+ /* insert any results for this type */
+ if (item) {
+ item->item = (void *)type;
+ if (apol_vector_append(res->items, (void *)item) < 0) {
+ error = errno;
+ ERR(policy, "%s", strerror(ENOMEM));
+ goto find_file_types_run_fail;
+ }
+ }
+ item = NULL;
+ type = NULL;
+ type_name = NULL;
+ }
+ apol_vector_destroy(&type_vector);
+
+ /* results are valid at this point */
+ mod->result = res;
+
+ return 0;
+
+ find_file_types_run_fail:
+ sechk_proof_free(proof);
+ sechk_item_free(item);
+ free(buff);
+ apol_vector_destroy(&type_vector);
+ sechk_result_destroy(&res);
+ errno = error;
+ return -1;
+}
+
+void find_file_types_data_free(void *data)
+{
+ find_file_types_data_t *datum = (find_file_types_data_t *) data;
+
+ if (datum) {
+ apol_vector_destroy(&datum->file_type_attribs);
+ }
+ free(data);
+}
+
+int find_file_types_print(sechk_module_t * mod, apol_policy_t * policy, void *arg __attribute__ ((unused)))
+{
+ find_file_types_data_t *datum = NULL;
+ unsigned char outformat = 0x00;
+ sechk_item_t *item = NULL;
+ sechk_proof_t *proof = NULL;
+ size_t i = 0, j = 0, k = 0, l = 0, num_items = 0;
+ const qpol_type_t *type;
+ qpol_policy_t *q = apol_policy_get_qpol(policy);
+ const char *type_name;
+
+ if (!mod || !policy) {
+ ERR(policy, "%s", "Invalid parameters");
+ errno = EINVAL;
+ return -1;
+ }
+ if (strcmp(mod_name, mod->name)) {
+ ERR(policy, "Wrong module (%s)", mod->name);
+ errno = EINVAL;
+ return -1;
+ }
+
+ datum = (find_file_types_data_t *) mod->data;
+ outformat = mod->outputformat;
+
+ if (!mod->result) {
+ ERR(policy, "%s", "Module has not been run");
+ errno = EINVAL;
+ return -1;
+ }
+
+ if (!outformat || (outformat & SECHK_OUT_QUIET))
+ return 0; /* not an error - no output is requested */
+ if (outformat & SECHK_OUT_STATS) {
+ num_items = apol_vector_get_size(mod->result->items);
+ printf("Found %zd file types.\n", num_items);
+ }
+ if (outformat & SECHK_OUT_PROOF) {
+ printf("\nThe following types are file types.\n\n");
+ }
+ if (outformat & SECHK_OUT_LIST) {
+ printf("\n");
+ for (i = 0; i < apol_vector_get_size(mod->result->items); i++) {
+ j++;
+ item = apol_vector_get_element(mod->result->items, i);
+ type = item->item;
+ qpol_type_get_name(q, type, &type_name);
+ j %= 4;
+ printf("%s%s", type_name, (char *)((j && i != num_items - 1) ? ", " : "\n"));
+ }
+ printf("\n");
+ }
+
+ if (outformat & SECHK_OUT_PROOF) {
+ printf("\n");
+ for (k = 0; k < apol_vector_get_size(mod->result->items); k++) {
+ item = apol_vector_get_element(mod->result->items, k);
+ if (item) {
+ type = item->item;
+ qpol_type_get_name(q, type, &type_name);
+ printf("%s\n", (char *)type_name);
+ for (l = 0; l < apol_vector_get_size(item->proof); l++) {
+ proof = apol_vector_get_element(item->proof, l);
+ if (proof)
+ printf("\t%s\n", proof->text);
+ }
+ }
+ }
+ printf("\n");
+ }
+
+ return 0;
+}
+
+int find_file_types_get_list(sechk_module_t * mod, apol_policy_t * policy __attribute__ ((unused)), void *arg
+ __attribute__ ((unused)))
+{
+ apol_vector_t **v = arg;
+
+ if (!mod || !arg) {
+ ERR(NULL, "%s", strerror(EINVAL));
+ errno = EINVAL;
+ return -1;
+ }
+ if (strcmp(mod_name, mod->name)) {
+ ERR(NULL, "Wrong module (%s)", mod->name);
+ errno = EINVAL;
+ return -1;
+ }
+ if (!mod->result) {
+ ERR(NULL, "%s", "Module has not been run");
+ errno = EINVAL;
+ return -1;
+ }
+
+ v = &mod->result->items;
+
+ return 0;
+}
+
+find_file_types_data_t *find_file_types_data_new(void)
+{
+ find_file_types_data_t *datum = NULL;
+
+ datum = (find_file_types_data_t *) calloc(1, sizeof(find_file_types_data_t));
+
+ return datum;
+}
generated by cgit (git 2.34.1) at 2024-04-26 12:54:34 +0000