1 files changed, 398 insertions, 0 deletions
diff --git a/sechecker/modules/domain_and_file.c b/sechecker/modules/domain_and_file.c
new file mode 100644
index 0000000..418e2a5
--- /dev/null
+++ b/sechecker/modules/domain_and_file.c
@@ -0,0 +1,398 @@
+/**
+ *  @file
+ *  Implementation of the domain and file type module.
+ *
+ *  @author Kevin Carr kcarr@tresys.com
+ *  @author Jeremy A. Mowery jmowery@tresys.com
+ *  @author Jason Tang jtang@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 "domain_and_file.h"
+
+#include <stdio.h>
+#include <string.h>
+#include <errno.h>
+
+static const char *const mod_name = "domain_and_file";
+
+int domain_and_file_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 descriptions */
+	mod->brief_description = "types treated as a domain and file type";
+	mod->detailed_description =
+		"--------------------------------------------------------------------------------\n"
+		"This module finds all types in the policy treated as both a domain and a file   \n"
+		"type.  See find_domains and find_file_types modules for details about the       \n"
+		"heuristics used to determine these types.  It is considered bad security\n"
+		"practice to use the same type for a domain and its data objects because it \n"
+		"requires that less restrictive access be granted to these types.\n";
+	mod->opt_description = "Module requirements:\n" "   attribute names\n"
+		"   file_contexts\n"
+		"Module dependencies:\n" "   find_domains module\n" "   find_file_types module\n" "Module options:\n" "   none\n";
+	mod->severity = SECHK_SEV_LOW;
+	/* 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 dependencies */
+	apol_vector_append(mod->dependencies, sechk_name_value_new("module", "find_domains"));
+	apol_vector_append(mod->dependencies, sechk_name_value_new("module", "find_file_types"));
+
+	/* 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 = &domain_and_file_init;
+	if (apol_vector_append(mod->functions, (void *)fn_struct) < 0) {
+		ERR(NULL, "%s", strerror(ENOMEM));
+		errno = ENOMEM;
+		return -1;
+	}
+
+	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 = domain_and_file_run;
+	if (apol_vector_append(mod->functions, (void *)fn_struct) < 0) {
+		ERR(NULL, "%s", strerror(ENOMEM));
+		errno = ENOMEM;
+		return -1;
+	}
+
+	mod->data_free = NULL;
+
+	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 = domain_and_file_print;
+	if (apol_vector_append(mod->functions, (void *)fn_struct) < 0) {
+		ERR(NULL, "%s", strerror(ENOMEM));
+		errno = ENOMEM;
+		return -1;
+	}
+
+	return 0;
+}
+
+int domain_and_file_init(sechk_module_t * mod, apol_policy_t * policy, void *arg __attribute__ ((unused)))
+{
+	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;
+	}
+
+	mod->data = NULL;
+
+	return 0;
+}
+
+int domain_and_file_run(sechk_module_t * mod, apol_policy_t * policy, void *arg __attribute__ ((unused)))
+{
+	sechk_result_t *res = NULL;
+	sechk_item_t *item = NULL;
+	sechk_proof_t *proof = NULL;
+	sechk_result_t *domain_res = NULL, *file_type_res = NULL;
+	size_t i, j, k;
+	sechk_mod_fn_t run_fn = NULL;
+	sechk_name_value_t *dep = NULL;
+	apol_vector_t *domain_vector;
+	apol_vector_t *type_vector;
+	qpol_policy_t *q = apol_policy_get_qpol(policy);
+	int error = 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;
+	}
+
+	/* if already run return */
+	if (mod->result)
+		return 0;
+
+	res = sechk_result_new();
+	if (!res) {
+		ERR(policy, "%s", strerror(ENOMEM));
+		errno = ENOMEM;
+		return -1;
+	}
+	res->test_name = strdup(mod_name);
+	if (!res->test_name) {
+		error = errno;
+		ERR(policy, "%s", strerror(ENOMEM));
+		goto domain_and_file_run_fail;
+	}
+	res->item_type = SECHK_ITEM_TYPE;
+	if (!(res->items = apol_vector_create(sechk_item_free))) {
+		error = errno;
+		ERR(policy, "%s", strerror(ENOMEM));
+		goto domain_and_file_run_fail;
+	}
+
+	/* run dependencies */
+	for (i = 0; i < apol_vector_get_size(mod->dependencies); i++) {
+		dep = apol_vector_get_element(mod->dependencies, i);
+		run_fn = sechk_lib_get_module_function(dep->value, SECHK_MOD_FN_RUN, mod->parent_lib);
+		run_fn(sechk_lib_get_module(dep->value, mod->parent_lib), policy, NULL);
+	}
+
+	/* get results */
+	domain_res = sechk_lib_get_module_result("find_domains", mod->parent_lib);
+	if (!domain_res) {
+		error = errno;
+		ERR(policy, "%s", "Unable to get results for module find_domains");
+		goto domain_and_file_run_fail;
+	}
+	file_type_res = sechk_lib_get_module_result("find_file_types", mod->parent_lib);
+	if (!file_type_res) {
+		error = errno;
+		ERR(policy, "%s", "Unable to get results for module find_file_types");
+		goto domain_and_file_run_fail;
+	}
+
+	/* get lists */
+	domain_vector = (apol_vector_t *) domain_res->items;
+	type_vector = (apol_vector_t *) file_type_res->items;
+
+	/* build the both list */
+	for (i = 0; i < apol_vector_get_size(type_vector); i++) {
+		sechk_item_t *type_item;
+		qpol_type_t *type;
+		const char *type_name;
+
+		type_item = apol_vector_get_element(type_vector, i);
+		type = type_item->item;
+		qpol_type_get_name(q, type, &type_name);
+		for (j = 0; j < apol_vector_get_size(domain_vector); j++) {
+			sechk_item_t *domain_item;
+			qpol_type_t *domain;
+			const char *domain_name;
+
+			domain_item = apol_vector_get_element(domain_vector, j);
+			domain = domain_item->item;
+			qpol_type_get_name(q, domain, &domain_name);
+			if (!strcmp(domain_name, type_name)) {
+				item = sechk_item_new(NULL);
+				if (!item) {
+					error = errno;
+					ERR(policy, "%s", strerror(ENOMEM));
+					goto domain_and_file_run_fail;
+				}
+				item->item = (void *)domain;
+				if (!(item->proof = apol_vector_create(sechk_proof_free))) {
+					error = errno;
+					ERR(policy, "%s", strerror(ENOMEM));
+					goto domain_and_file_run_fail;
+				}
+				for (k = 0; k < apol_vector_get_size(domain_item->proof); k++) {
+					sechk_proof_t *domain_proof;
+
+					domain_proof = apol_vector_get_element(domain_item->proof, k);
+					proof = sechk_proof_new(NULL);
+					if (!proof) {
+						error = errno;
+						ERR(policy, "%s", strerror(ENOMEM));
+						goto domain_and_file_run_fail;
+					}
+					proof->type = SECHK_ITEM_TYPE;
+					proof->text = strdup(domain_proof->text);
+					if (!proof->text) {
+						error = errno;
+						ERR(policy, "%s", strerror(ENOMEM));
+						goto domain_and_file_run_fail;
+					}
+					if (apol_vector_append(item->proof, (void *)proof) < 0) {
+						error = errno;
+						ERR(policy, "%s", strerror(ENOMEM));
+						goto domain_and_file_run_fail;
+					}
+				}
+				for (k = 0; k < apol_vector_get_size(type_item->proof); k++) {
+					sechk_proof_t *type_proof;
+
+					type_proof = apol_vector_get_element(type_item->proof, k);
+					proof = sechk_proof_new(NULL);
+					if (!proof) {
+						error = errno;
+						ERR(policy, "%s", strerror(ENOMEM));
+						goto domain_and_file_run_fail;
+					}
+					proof->type = SECHK_ITEM_TYPE;
+					proof->text = strdup(type_proof->text);
+					if (!proof->text) {
+						error = errno;
+						ERR(policy, "%s", strerror(ENOMEM));
+						goto domain_and_file_run_fail;
+					}
+					if (apol_vector_append(item->proof, (void *)proof) < 0) {
+						error = errno;
+						ERR(policy, "%s", strerror(ENOMEM));
+						goto domain_and_file_run_fail;
+					}
+				}
+				if (apol_vector_append(res->items, (void *)item) < 0) {
+					error = errno;
+					ERR(policy, "%s", strerror(ENOMEM));
+					goto domain_and_file_run_fail;
+				}
+			}
+		}
+	}
+
+	mod->result = res;
+
+	if (apol_vector_get_size(res->items))
+		return 1;
+	return 0;
+
+      domain_and_file_run_fail:
+	sechk_proof_free(proof);
+	sechk_item_free(item);
+	sechk_result_destroy(&res);
+	errno = error;
+	return -1;
+}
+
+int domain_and_file_print(sechk_module_t * mod, apol_policy_t * policy, void *arg __attribute__ ((unused)))
+{
+	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;
+	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;
+	}
+
+	outformat = mod->outputformat;
+	num_items = apol_vector_get_size(mod->result->items);
+
+	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) {
+		printf("Found %zd types.\n", num_items);
+	}
+	if (outformat & SECHK_OUT_LIST) {
+		printf("\n");
+		for (i = 0; i < num_items; i++) {
+			j++;
+			j %= 4;
+			item = apol_vector_get_element(mod->result->items, i);
+			type = (qpol_type_t *) item->item;
+			qpol_type_get_name(q, type, &type_name);
+			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 < num_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;
+}