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+/**
+ * @file
+ * Implementation of the xx module.
+ *
+ * @author Jeremy A. Mowery jmowery@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
+ */
+
+/* NOTE: TODO This is a module template, which includes all the necessary
+ * infrastructure to implement a basic SEChecker module. To use this template
+ * first replace all instances of the string xx with the name of the module,
+ * then edit or complete all sections marked TODO as instructed. */
+
+#include <config.h>
+
+#include "sechecker.h"
+#include <apol/policy.h>
+#include "xx.h"
+
+#include <stdio.h>
+#include <string.h>
+#include <errno.h>
+
+/* This string is the name of the module and should match the stem of the file
+ * name; it should also match the prefix of all functions defined in this
+ * module and the private data storage structure */
+static const char *const mod_name = "xx";
+
+/* The register function registers all of a module's functions
+ * with the library. TODO: Edit the description fields to include all
+ * options, requirements, and dependencies. Also provide a brief summary
+ * of the steps performed in this module's checks. If you are adding
+ * additional functions you need other modules to call, see the note at
+ * the bottom of this function to do so. */
+int xx_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, "No library");
+ errno = EINVAL;
+ return -1;
+ }
+
+ /* Modules are declared by the register list file and their name and options
+ * are stored in the module vector of the library. The name is looked up to
+ * determine where to store the function structures */
+ mod = sechk_lib_get_module(mod_name, lib);
+ if (!mod) {
+ ERR(lib->policy, "Module unknown \"%s\"", mod_name);
+ errno = ENOENT;
+ return -1;
+ }
+
+ mod->parent_lib = lib;
+
+ /* TODO: assign the descriptions */
+ mod->brief_description = "";
+ mod->detailed_description =
+ "--------------------------------------------------------------------------------\n"
+ "TODO: detailed description for this module.\n";
+ mod->opt_description =
+ " Module requirements:\n" " none\n" " Module dependencies:\n" " none\n" " Module options:\n" " none\n";
+ mod->severity = "TODO: set proper severity";
+
+ /* TODO: assign default options (remove if none)
+ * fill name and value and repeat as needed */
+ nv = sechk_name_value_new("", "");
+ apol_vector_append(mod->options, (void *)nv);
+
+ /* TODO: assign requirements (remove if none)
+ * fill name and value and repeat as needed */
+ nv = sechk_name_value_new("", "");
+ apol_vector_append(mod->requirements, (void *)nv);
+
+ /* TODO: assign dependencies (remove if not needed)
+ * fill name and value and repeat as needed */
+ nv = sechk_name_value_new("", "");
+ apol_vector_append(mod->dependencies, (void *)nv);
+
+ /* register functions */
+ fn_struct = sechk_fn_new();
+ if (!fn_struct) {
+ ERR(lib->policy, "%s", strerror(ENOMEM));
+ errno = ENOMEM;
+ return -1;
+ }
+ fn_struct->name = strdup(SECHK_MOD_FN_INIT);
+ if (!fn_struct->name) {
+ ERR(lib->policy, "%s", strerror(ENOMEM));
+ errno = ENOMEM;
+ return -1;
+ }
+ fn_struct->fn = xx_init;
+ apol_vector_append(mod->functions, (void *)fn_struct);
+
+ fn_struct = sechk_fn_new();
+ if (!fn_struct) {
+ ERR(lib->policy, "%s", strerror(ENOMEM));
+ errno = ENOMEM;
+ return -1;
+ }
+ fn_struct->name = strdup(SECHK_MOD_FN_RUN);
+ if (!fn_struct->name) {
+ ERR(lib->policy, "%s", strerror(ENOMEM));
+ errno = ENOMEM;
+ return -1;
+ }
+ fn_struct->fn = xx_run;
+ apol_vector_append(mod->functions, (void *)fn_struct);
+
+ /* TODO: if the module does not have a private data structure
+ * set this function pointer to NULL */
+ mod->data_free = xx_data_free;
+
+ fn_struct = sechk_fn_new();
+ if (!fn_struct) {
+ ERR(lib->policy, "%s", strerror(ENOMEM));
+ errno = ENOMEM;
+ return -1;
+ }
+ fn_struct->name = strdup(SECHK_MOD_FN_PRINT);
+ if (!fn_struct->name) {
+ ERR(lib->policy, "%s", strerror(ENOMEM));
+ errno = ENOMEM;
+ return -1;
+ }
+ fn_struct->fn = xx_print;
+ apol_vector_append(mod->functions, (void *)fn_struct);
+
+ /* TODO: (optional) add any other functions needed here,
+ * add a block as above for each additional function */
+
+ return 0;
+}
+
+/* The init function creates the module's private data storage object and
+ * initializes its values. Add any option processing logic as indicated below.
+ * TODO: add options processing logic */
+int xx_init(sechk_module_t * mod, apol_policy_t * policy, void *arg __attribute__ ((unused)))
+{
+ sechk_name_value_t *opt = NULL;
+ xx_data_t *datum = NULL;
+ int error = 0;
+ size_t i = 0;
+
+ if (!mod || !policy) {
+ ERR(policy, "%s", strerror(EINVAL));
+ errno = EINVAL;
+ return -1;
+ }
+ if (strcmp(mod_name, mod->name)) {
+ ERR(policy, "Wrong module (%s)\n", mod->name);
+ errno = EINVAL;
+ return -1;
+ }
+
+ /* If the module doesnot have a privte data sturcture replace the following
+ * block with "mod->data = NULL" */
+ datum = xx_data_new();
+ if (!datum) {
+ error = errno;
+ ERR(policy, "Error: %s\n", strerror(error));
+ errno = error;
+ return -1;
+ }
+ mod->data = datum;
+
+ for (i = 0; i < apol_vector_get_size(mod->options); i++) {
+ opt = apol_vector_get_element(mod->options, i);
+ /* TODO: check options
+ * check strings opt->name and opt->value of each option
+ * to set the members of the private data storage object
+ * (pointed to by datum).
+ * i.e. if (!strcmp(...)) {} else if (!strcmp((...)) etc.
+ * There should be relatively few options for any one module.
+ * If too many options are needed consider splitting the check
+ * into multiple modules and using dependencies. It is desirable
+ * for all checks to be a simple and granular as is possible */
+ }
+
+ return 0;
+}
+
+/* The run function performs the check. This function runs only once
+ * even if called multiple times. All test logic should be placed below
+ * as instructed. This function allocates the result structure and fills
+ * in all relavant item and proof data.
+ * Return Values:
+ * -1 System error
+ * 0 The module "succeeded" - no negative results found
+ * 1 The module "failed" - some negative results found
+ * TODO: add check logic */
+int xx_run(sechk_module_t * mod, apol_policy_t * policy, void *arg __attribute__ ((unused)))
+{
+ xx_data_t *datum;
+ sechk_result_t *res = NULL;
+ sechk_item_t *item = NULL;
+ sechk_proof_t *proof = NULL;
+ int error = 0;
+
+ /* TODO: define any aditional variables needed */
+
+ if (!mod || !policy) {
+ ERR(policy, "%s", strerror(EINVAL));
+ errno = EINVAL;
+ return -1;
+ }
+ if (strcmp(mod_name, mod->name)) {
+ ERR(policy, "Wrong module (%s)", mod->name);
+ return -1;
+ }
+
+ /* if already run return */
+ if (mod->result)
+ return 0;
+
+ datum = (xx_data_t *) mod->data;
+ res = sechk_result_new();
+ if (!res) {
+ error = errno;
+ ERR(policy, "%s", strerror(error));
+ errno = error;
+ return -1;
+ }
+ res->test_name = strdup(mod_name);
+ if (!res->test_name) {
+ error = errno;
+ ERR(policy, "%s", strerror(error));
+ goto xx_run_fail;
+ }
+ /* TODO: set res->item_type to indicate which array the item_id indexes
+ * use values from the sechk_item_type_e enum (see sechecker.h) */
+
+ /* TODO: check logic here
+ * Perform check here. Create and initialize items and proof as found,
+ * appending to the appropriate vectors.
+ * For examples of the type of code to use here see other modules. */
+
+ mod->result = res;
+
+ /* If module finds something that would be considered a failure
+ * of the policy return 1 here */
+ if (apol_vector_get_size(res->items) > 0)
+ return 1;
+
+ return 0;
+
+ xx_run_fail:
+ /* TODO: free any other memory allocated during check logic */
+ sechk_proof_free(proof);
+ sechk_item_free(item);
+ sechk_result_destroy(&res);
+ errno = error;
+ return -1;
+}
+
+/* The free function frees the private data of a module
+ * TODO: be sure to free any allocated space in the private data */
+void xx_data_free(void *data)
+{
+ xx_data_t *datum = (xx_data_t *) data;
+
+ if (datum) {
+ /* TODO: free any allocated members of the module's
+ * private data structure */
+ }
+
+ free(data);
+}
+
+/* The print function generates the text and prints the results to stdout. The
+ * outline below prints the standard format of a report section. Some modules
+ * may not have results in a format that can be represented by this outline and
+ * will need a different specification. It is required that each of the flags
+ * for output components be tested in this function (stats, list, proof,
+ * detailed, and brief) TODO: fill in the indicated information in the report
+ * fields as indicated below. Some alteration may be necessary for checks that
+ * perform different analyses */
+int xx_print(sechk_module_t * mod, apol_policy_t * policy, void *arg __attribute__ ((unused)))
+{
+ xx_data_t *datum = NULL;
+ unsigned char outformat = 0x00;
+ sechk_item_t *item = NULL;
+ sechk_proof_t *proof = NULL;
+ size_t i = 0, j = 0;
+
+ if (!mod || !policy) {
+ ERR(policy, "%s", strerror(EINVAL));
+ errno = EINVAL;
+ return -1;
+ }
+ if (strcmp(mod_name, mod->name)) {
+ ERR(policy, "Wrong module (%s)", mod->name);
+ errno = EINVAL;
+ return -1;
+ }
+
+ datum = (xx_data_t *) mod->data;
+ outformat = mod->outputformat;
+
+ if (!mod->result) {
+ ERR(policy, "Module %s has not been run", mod->name);
+ errno = EINVAL;
+ return -1;
+ }
+
+ if (!outformat || (outformat & SECHK_OUT_QUIET))
+ return 0; /* not an error - no output is requested */
+
+ /* TODO: display the statistics of the results
+ * typical text is "Found %i <itemtype>.\n"
+ * additional information may be printed here depending upon
+ * the amount of data gathered in the check */
+ if (outformat & SECHK_OUT_STATS) {
+ /* TODO: "Found %i <itemtype>.\n": enter itemtype */
+ printf("Found %zd .\n", apol_vector_get_size(mod->result->items));
+ /* TODO: any additional generated statistics */
+ }
+ /* The list report component is a display of all items found without any
+ * supporting proof. The default method is to display a comma separated list
+ * four items to a line this may need to be changed for longer items.
+ * TODO: you will need to enter the string representation of
+ * each item as the second parameter in the printf statement
+ * in place of the empty string.
+ * NOTE: if the item is a type of rule print only one per line. */
+ if (outformat & SECHK_OUT_LIST) {
+ printf("\n");
+ for (i = 0; i < apol_vector_get_size(mod->result->items); i++) {
+ item = apol_vector_get_element(mod->result->items, i);
+ i++;
+ /* TODO: (optional) change the number below to
+ * print more or less than 4 items per line */
+ i %= 4;
+ /* TODO: second parameter: item name */
+ printf("%s%s", "", (i ? ", " : "\n"));
+ }
+ printf("\n");
+ }
+ /* The proof report component is a display of a list of items with an
+ * indented list of proof statements supporting the result of the check for
+ * that item (e.g. rules with a given type). Each proof element is then
+ * displayed in an indented list one per line below it.
+ * TODO: the name of the item should be entered below.
+ * NOTE: certain checks may need to further modify this report component if
+ * the results cannot be presented in this format */
+ if (outformat & SECHK_OUT_PROOF) {
+ printf("\n");
+ for (i = 0; i < apol_vector_get_size(mod->result->items); i++) {
+ item = apol_vector_get_element(mod->result->items, i);
+ printf("%s", ""); /* TODO: item name */
+ printf(" - severity: %s\n", sechk_item_sev(item));
+ for (j = 0; j < apol_vector_get_size(item->proof); j++) {
+ proof = apol_vector_get_element(item->proof, j);
+ printf("\t%s\n", proof->text);
+ }
+ }
+ printf("\n");
+ }
+
+ return 0;
+}
+
+/* The xx_data_new function allocates and returns an initialized private data
+ * storage structure for this module.
+ * TODO: initialize any non-zero/non-null data (if needed) below */
+xx_data_t *xx_data_new(void)
+{
+ xx_data_t *datum = NULL;
+
+ datum = (xx_data_t *) calloc(1, sizeof(xx_data_t));
+
+ /* TODO: initialize data */
+
+ return datum;
+}