diff options
Diffstat (limited to 'framework/src/audit/audisp/audispd-pconfig.c')
| -rw-r--r-- | framework/src/audit/audisp/audispd-pconfig.c | 516 |
1 files changed, 0 insertions, 516 deletions
diff --git a/framework/src/audit/audisp/audispd-pconfig.c b/framework/src/audit/audisp/audispd-pconfig.c deleted file mode 100644 index 4ae1b4d1..00000000 --- a/framework/src/audit/audisp/audispd-pconfig.c +++ /dev/null @@ -1,516 +0,0 @@ -/* audispd-pconfig.c -- - * Copyright 2007,2010,2015 Red Hat Inc., Durham, North Carolina. - * All Rights Reserved. - * - * 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., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA - * - * Authors: - * Steve Grubb <sgrubb@redhat.com> - * - */ - -#include "config.h" -#include <string.h> -#include <stdio.h> -#include <fcntl.h> -#include <sys/stat.h> -#include <errno.h> -#include <unistd.h> -#include <stdlib.h> -#include <libgen.h> -#include "audispd-pconfig.h" -#include "private.h" - -/* Local prototypes */ -struct nv_pair -{ - const char *name; - const char *value; - const char *option; -}; - -struct kw_pair -{ - const char *name; - int (*parser)(struct nv_pair *, int, plugin_conf_t *); - int max_options; -}; - -struct nv_list -{ - const char *name; - int option; -}; - -static char *get_line(FILE *f, char *buf, unsigned size, int *lineno, - const char *file); -static int nv_split(char *buf, struct nv_pair *nv); -static const struct kw_pair *kw_lookup(const char *val); -static int active_parser(struct nv_pair *nv, int line, - plugin_conf_t *config); -static int direction_parser(struct nv_pair *nv, int line, - plugin_conf_t *config); -static int path_parser(struct nv_pair *nv, int line, - plugin_conf_t *config); -static int service_type_parser(struct nv_pair *nv, int line, - plugin_conf_t *config); -static int args_parser(struct nv_pair *nv, int line, - plugin_conf_t *config); -static int format_parser(struct nv_pair *nv, int line, - plugin_conf_t *config); -static int sanity_check(plugin_conf_t *config, const char *file); - -static const struct kw_pair keywords[] = -{ - {"active", active_parser, 0 }, - {"direction", direction_parser, 0 }, - {"path", path_parser, 0 }, - {"type", service_type_parser, 0 }, - {"args", args_parser, 2 }, - {"format", format_parser, 0 }, - { NULL, NULL } -}; - -static const struct nv_list active[] = -{ - {"yes", A_YES }, - {"no", A_NO }, - { NULL, 0 } -}; - -static const struct nv_list directions[] = -{ -// {"in", D_IN }, FIXME: not supported yet - {"out", D_OUT }, - { NULL, 0 } -}; - -static const struct nv_list service_type[] = -{ - {"builtin", S_BUILTIN }, - {"always", S_ALWAYS }, - { NULL, 0 } -}; - -static const struct nv_list formats[] = -{ - {"binary", F_BINARY }, - {"string", F_STRING }, - { NULL, 0 } -}; - -/* - * Set everything to its default value -*/ -void clear_pconfig(plugin_conf_t *config) -{ - int i; - - config->active = A_NO; - config->direction = D_UNSET; - config->path = NULL; - config->type = S_ALWAYS; - for (i=0; i< (MAX_PLUGIN_ARGS + 2); i++) - config->args[i] = NULL; - config->format = F_STRING; - config->plug_pipe[0] = -1; - config->plug_pipe[1] = -1; - config->pid = 0; - config->inode = 0; - config->checked = 0; - config->name = NULL; - config->restart_cnt = 0; -} - -int load_pconfig(plugin_conf_t *config, char *file) -{ - int fd, rc, mode, lineno = 1; - struct stat st; - FILE *f; - char buf[160]; - - clear_pconfig(config); - - /* open the file */ - mode = O_RDONLY; - rc = open(file, mode); - if (rc < 0) { - if (errno != ENOENT) { - audit_msg(LOG_ERR, "Error opening %s (%s)", file, - strerror(errno)); - return 1; - } - audit_msg(LOG_WARNING, - "Config file %s doesn't exist, skipping", file); - return 0; - } - fd = rc; - - /* check the file's permissions: owned by root, not world writable, - * not symlink. - */ - if (fstat(fd, &st) < 0) { - audit_msg(LOG_ERR, "Error fstat'ing config file (%s)", - strerror(errno)); - close(fd); - return 1; - } - if (st.st_uid != 0) { - audit_msg(LOG_ERR, "Error - %s isn't owned by root", - file); - close(fd); - return 1; - } - if ((st.st_mode & S_IWOTH) == S_IWOTH) { - audit_msg(LOG_ERR, "Error - %s is world writable", - file); - close(fd); - return 1; - } - if (!S_ISREG(st.st_mode)) { - audit_msg(LOG_ERR, "Error - %s is not a regular file", - file); - close(fd); - return 1; - } - - /* it's ok, read line by line */ - f = fdopen(fd, "rm"); - if (f == NULL) { - audit_msg(LOG_ERR, "Error - fdopen failed (%s)", - strerror(errno)); - close(fd); - return 1; - } - - while (get_line(f, buf, sizeof(buf), &lineno, file)) { - // convert line into name-value pair - const struct kw_pair *kw; - struct nv_pair nv; - rc = nv_split(buf, &nv); - switch (rc) { - case 0: // fine - break; - case 1: // not the right number of tokens. - audit_msg(LOG_ERR, - "Wrong number of arguments for line %d in %s", - lineno, file); - break; - case 2: // no '=' sign - audit_msg(LOG_ERR, - "Missing equal sign for line %d in %s", - lineno, file); - break; - default: // something else went wrong... - audit_msg(LOG_ERR, - "Unknown error for line %d in %s", - lineno, file); - break; - } - if (nv.name == NULL) { - lineno++; - continue; - } - if (nv.value == NULL) { - fclose(f); - return 1; - } - - /* identify keyword or error */ - kw = kw_lookup(nv.name); - if (kw->name == NULL) { - audit_msg(LOG_ERR, - "Unknown keyword \"%s\" in line %d of %s", - nv.name, lineno, file); - fclose(f); - return 1; - } - - /* Check number of options */ - if (kw->max_options == 0 && nv.option != NULL) { - audit_msg(LOG_ERR, - "Keyword \"%s\" has invalid option " - "\"%s\" in line %d of %s", - nv.name, nv.option, lineno, file); - fclose(f); - return 1; - } - - /* dispatch to keyword's local parser */ - rc = kw->parser(&nv, lineno, config); - if (rc != 0) { - fclose(f); - return 1; // local parser puts message out - } - - lineno++; - } - - fclose(f); - config->name = strdup(basename(file)); - if (lineno > 1) - return sanity_check(config, file); - return 0; -} - -static char *get_line(FILE *f, char *buf, unsigned size, int *lineno, - const char *file) -{ - int too_long = 0; - - while (fgets_unlocked(buf, size, f)) { - /* remove newline */ - char *ptr = strchr(buf, 0x0a); - if (ptr) { - if (!too_long) { - *ptr = 0; - return buf; - } - // Reset and start with the next line - too_long = 0; - *lineno = *lineno + 1; - } else { - // If a line is too long skip it. - // Only output 1 warning - if (!too_long) - audit_msg(LOG_ERR, - "Skipping line %d in %s: too long", - *lineno, file); - too_long = 1; - } - } - return NULL; -} - -static int nv_split(char *buf, struct nv_pair *nv) -{ - /* Get the name part */ - char *ptr, *saved; - - nv->name = NULL; - nv->value = NULL; - nv->option = NULL; - ptr = strtok_r(buf, " ", &saved); - if (ptr == NULL) - return 0; /* If there's nothing, go to next line */ - if (ptr[0] == '#') - return 0; /* If there's a comment, go to next line */ - nv->name = ptr; - - /* Check for a '=' */ - ptr = strtok_r(NULL, " ", &saved); - if (ptr == NULL) - return 1; - if (strcmp(ptr, "=") != 0) - return 2; - - /* get the value */ - ptr = strtok_r(NULL, " ", &saved); - if (ptr == NULL) - return 1; - nv->value = ptr; - - /* See if there's an option */ - ptr = strtok_r(NULL, " ", &saved); - if (ptr) { - nv->option = ptr; - - /* Make sure there's nothing else */ - ptr = strtok_r(NULL, " ", &saved); - if (ptr) - return 1; - } - - /* Everything is OK */ - return 0; -} - -static const struct kw_pair *kw_lookup(const char *val) -{ - int i = 0; - while (keywords[i].name != NULL) { - if (strcasecmp(keywords[i].name, val) == 0) - break; - i++; - } - return &keywords[i]; -} - -static int active_parser(struct nv_pair *nv, int line, - plugin_conf_t *config) -{ - int i; - - for (i=0; active[i].name != NULL; i++) { - if (strcasecmp(nv->value, active[i].name) == 0) { - config->active = active[i].option; - return 0; - } - } - audit_msg(LOG_ERR, "Option %s not found - line %d", nv->value, line); - return 1; -} - -static int direction_parser(struct nv_pair *nv, int line, - plugin_conf_t *config) -{ - int i; - - for (i=0; directions[i].name != NULL; i++) { - if (strcasecmp(nv->value, directions[i].name) == 0) { - config->direction = directions[i].option; - return 0; - } - } - audit_msg(LOG_ERR, "Option %s not found - line %d", nv->value, line); - return 1; -} - -static int path_parser(struct nv_pair *nv, int line, - plugin_conf_t *config) -{ - char *dir = NULL, *tdir; - struct stat buf; - - if (nv->value == NULL) { - config->path = NULL; - return 0; - } - - if (strncasecmp(nv->value, "builtin_", 8) == 0) { - config->path = strdup(nv->value); - return 0; - } - - /* get dir form name. */ - tdir = strdup(nv->value); - if (tdir) - dir = dirname(tdir); - if (dir == NULL || strlen(dir) < 4) { // '/var' is shortest dirname - audit_msg(LOG_ERR, - "The directory name: %s is too short - line %d", - dir, line); - free(tdir); - return 1; - } - - free((void *)tdir); - /* If the file exists, see that its regular, owned by root, - * and not world anything */ - if (stat(nv->value, &buf) < 0) { - audit_msg(LOG_ERR, "Unable to stat %s (%s)", nv->value, - strerror(errno)); - return 1; - } - if (!S_ISREG(buf.st_mode)) { - audit_msg(LOG_ERR, "%s is not a regular file", nv->value); - return 1; - } - if (buf.st_uid != 0) { - audit_msg(LOG_ERR, "%s is not owned by root", nv->value); - return 1; - } - if ((buf.st_mode & (S_IRUSR|S_IWUSR|S_IXUSR|S_IRGRP|S_IXGRP)) != - (S_IRUSR|S_IWUSR|S_IXUSR|S_IRGRP|S_IXGRP)) { - audit_msg(LOG_ERR, "%s permissions should be 0750", nv->value); - return 1; - } - free((void *)config->path); - config->path = strdup(nv->value); - config->inode = buf.st_ino; - if (config->path == NULL) - return 1; - return 0; -} - -static int service_type_parser(struct nv_pair *nv, int line, - plugin_conf_t *config) -{ - int i; - - for (i=0; service_type[i].name != NULL; i++) { - if (strcasecmp(nv->value, service_type[i].name) == 0) { - config->type = service_type[i].option; - return 0; - } - } - audit_msg(LOG_ERR, "Option %s not found - line %d", nv->value, line); - return 1; -} - -static int args_parser(struct nv_pair *nv, int line, - plugin_conf_t *config) -{ - int i; - - for (i=0; i < (MAX_PLUGIN_ARGS + 2); i++) { - free((void *)config->args[i]); - config->args[i] = NULL; - } - - config->args[1] = strdup(nv->value); - if (nv->option) - config->args[2] = strdup(nv->option); - return 0; -} - -static int format_parser(struct nv_pair *nv, int line, - plugin_conf_t *config) -{ - int i; - - for (i=0; formats[i].name != NULL; i++) { - if (strcasecmp(nv->value, formats[i].name) == 0) { - config->format = formats[i].option; - return 0; - } - } - audit_msg(LOG_ERR, "Option %s not found - line %d", nv->value, line); - return 1; -} - -/* - * This function is where we do the integrated check of the audispd config - * options. At this point, all fields have been read. Returns 0 if no - * problems and 1 if problems detected. - */ -static int sanity_check(plugin_conf_t *config, const char *file) -{ - /* Error checking */ - if (config->active == A_YES && config->path == NULL) { - audit_msg(LOG_ERR, - "Error - plugin (%s) is active but no path given", file); - return 1; - } - return 0; -} - -void free_pconfig(plugin_conf_t *config) -{ - int i; - - if (config == NULL) - return; - - for (i=0; i < (MAX_PLUGIN_ARGS + 2); i++) - free(config->args[i]); - if (config->plug_pipe[0] >= 0) - close(config->plug_pipe[0]); - if (config->plug_pipe[1] >= 0) - close(config->plug_pipe[1]); - free((void *)config->path); - free((void *)config->name); -} - |