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-rw-r--r--plugins/sudoers/testsudoers.c621
1 files changed, 621 insertions, 0 deletions
diff --git a/plugins/sudoers/testsudoers.c b/plugins/sudoers/testsudoers.c
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--- /dev/null
+++ b/plugins/sudoers/testsudoers.c
@@ -0,0 +1,621 @@
+/*
+ * SPDX-License-Identifier: ISC
+ *
+ * Copyright (c) 1996, 1998-2005, 2007-2022
+ * Todd C. Miller <Todd.Miller@sudo.ws>
+ *
+ * Permission to use, copy, modify, and distribute this software for any
+ * purpose with or without fee is hereby granted, provided that the above
+ * copyright notice and this permission notice appear in all copies.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
+ * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
+ * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
+ * ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
+ * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
+ * ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
+ * OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
+ *
+ * Sponsored in part by the Defense Advanced Research Projects
+ * Agency (DARPA) and Air Force Research Laboratory, Air Force
+ * Materiel Command, USAF, under agreement number F39502-99-1-0512.
+ */
+
+/*
+ * This is an open source non-commercial project. Dear PVS-Studio, please check it.
+ * PVS-Studio Static Code Analyzer for C, C++ and C#: http://www.viva64.com
+ */
+
+#include <config.h>
+
+#include <sys/types.h>
+#include <sys/stat.h>
+#include <netinet/in.h>
+#include <arpa/inet.h>
+#include <stdio.h>
+#include <stdlib.h>
+#include <string.h>
+#ifdef HAVE_STRINGS_H
+# include <strings.h>
+#endif /* HAVE_STRINGS_H */
+#include <unistd.h>
+#include <errno.h>
+
+#include "tsgetgrpw.h"
+#include "sudoers.h"
+#include "interfaces.h"
+#include "sudo_conf.h"
+#include "sudo_lbuf.h"
+#include <gram.h>
+
+#ifndef YYDEBUG
+# define YYDEBUG 0
+#endif
+
+enum sudoers_formats {
+ format_ldif,
+ format_sudoers
+};
+
+/*
+ * Function Prototypes
+ */
+static void dump_sudoers(struct sudo_lbuf *lbuf);
+static void set_runaspw(const char *);
+static void set_runasgr(const char *);
+static bool cb_runas_default(const char *file, int line, int column, const union sudo_defs_val *, int);
+static int testsudoers_error(const char *msg);
+static int testsudoers_output(const char *buf);
+sudo_noreturn static void usage(void);
+
+/* testsudoers_pwutil.c */
+extern struct cache_item *testsudoers_make_gritem(gid_t gid, const char *group);
+extern struct cache_item *testsudoers_make_grlist_item(const struct passwd *pw, char * const *groups);
+extern struct cache_item *testsudoers_make_gidlist_item(const struct passwd *pw, char * const *gids, unsigned int type);
+extern struct cache_item *testsudoers_make_pwitem(uid_t uid, const char *user);
+
+/* gram.y */
+extern int (*trace_print)(const char *msg);
+
+/*
+ * Globals
+ */
+struct sudo_user sudo_user;
+struct passwd *list_pw;
+static const char *orig_cmnd;
+static char *runas_group, *runas_user;
+
+#if defined(SUDO_DEVEL) && defined(__OpenBSD__)
+extern char *malloc_options;
+#endif
+#if YYDEBUG
+extern int sudoersdebug;
+#endif
+
+sudo_dso_public int main(int argc, char *argv[]);
+
+int
+main(int argc, char *argv[])
+{
+ enum sudoers_formats input_format = format_sudoers;
+ struct cmndspec *cs;
+ struct privilege *priv;
+ struct userspec *us;
+ char *p, *grfile, *pwfile;
+ const char *errstr;
+ int match, host_match, runas_match, cmnd_match;
+ int ch, dflag, exitcode = EXIT_FAILURE;
+ struct sudo_lbuf lbuf;
+ debug_decl(main, SUDOERS_DEBUG_MAIN);
+
+#if defined(SUDO_DEVEL) && defined(__OpenBSD__)
+ malloc_options = "S";
+#endif
+#if YYDEBUG
+ sudoersdebug = 1;
+#endif
+
+ initprogname(argc > 0 ? argv[0] : "testsudoers");
+
+ if (!sudoers_initlocale(setlocale(LC_ALL, ""), def_sudoers_locale))
+ sudo_fatalx(U_("%s: %s"), __func__, U_("unable to allocate memory"));
+ sudo_warn_set_locale_func(sudoers_warn_setlocale);
+ bindtextdomain("sudoers", LOCALEDIR); /* XXX - should have own domain */
+ textdomain("sudoers");
+
+ /* No word wrap on output. */
+ sudo_lbuf_init(&lbuf, testsudoers_output, 0, NULL, 0);
+
+ /* Initialize the debug subsystem. */
+ if (sudo_conf_read(NULL, SUDO_CONF_DEBUG) == -1)
+ goto done;
+ if (!sudoers_debug_register(getprogname(), sudo_conf_debug_files(getprogname())))
+ goto done;
+
+ dflag = 0;
+ grfile = pwfile = NULL;
+ while ((ch = getopt(argc, argv, "+dg:G:h:i:P:p:tu:U:")) != -1) {
+ switch (ch) {
+ case 'd':
+ dflag = 1;
+ break;
+ case 'G':
+ sudoers_gid = (gid_t)sudo_strtoid(optarg, &errstr);
+ if (errstr != NULL)
+ sudo_fatalx("group-ID %s: %s", optarg, errstr);
+ break;
+ case 'g':
+ runas_group = optarg;
+ SET(sudo_user.flags, RUNAS_GROUP_SPECIFIED);
+ break;
+ case 'h':
+ user_host = optarg;
+ break;
+ case 'i':
+ if (strcasecmp(optarg, "ldif") == 0) {
+ input_format = format_ldif;
+ } else if (strcasecmp(optarg, "sudoers") == 0) {
+ input_format = format_sudoers;
+ } else {
+ sudo_warnx(U_("unsupported input format %s"), optarg);
+ usage();
+ }
+ break;
+ case 'p':
+ pwfile = optarg;
+ break;
+ case 'P':
+ grfile = optarg;
+ break;
+ case 't':
+ trace_print = testsudoers_error;
+ break;
+ case 'U':
+ sudoers_uid = (uid_t)sudo_strtoid(optarg, &errstr);
+ if (errstr != NULL)
+ sudo_fatalx("user-ID %s: %s", optarg, errstr);
+ break;
+ case 'u':
+ runas_user = optarg;
+ SET(sudo_user.flags, RUNAS_USER_SPECIFIED);
+ break;
+ default:
+ usage();
+ break;
+ }
+ }
+ argc -= optind;
+ argv += optind;
+
+ if (grfile != NULL || pwfile != NULL) {
+ /* Set group/passwd file and init the cache. */
+ if (grfile)
+ testsudoers_setgrfile(grfile);
+ if (pwfile)
+ testsudoers_setpwfile(pwfile);
+
+ /* Use custom passwd/group backend. */
+ sudo_pwutil_set_backend(testsudoers_make_pwitem,
+ testsudoers_make_gritem, testsudoers_make_gidlist_item,
+ testsudoers_make_grlist_item);
+ }
+
+ if (argc < 2) {
+ if (!dflag)
+ usage();
+ user_name = argc ? *argv++ : (char *)"root";
+ orig_cmnd = "true";
+ argc = 0;
+ } else {
+ user_name = *argv++;
+ orig_cmnd = *argv++;
+ argc -= 2;
+ }
+ user_cmnd = strdup(orig_cmnd);
+ if (user_cmnd == NULL)
+ sudo_fatalx(U_("%s: %s"), __func__, U_("unable to allocate memory"));
+ user_base = sudo_basename(user_cmnd);
+
+ if ((sudo_user.pw = sudo_getpwnam(user_name)) == NULL)
+ sudo_fatalx(U_("unknown user %s"), user_name);
+
+ if (user_host == NULL) {
+ if ((user_host = sudo_gethostname()) == NULL)
+ sudo_fatal("gethostname");
+ }
+ if ((p = strchr(user_host, '.'))) {
+ *p = '\0';
+ if ((user_shost = strdup(user_host)) == NULL)
+ sudo_fatalx(U_("%s: %s"), __func__, U_("unable to allocate memory"));
+ *p = '.';
+ } else {
+ user_shost = user_host;
+ }
+ user_runhost = user_host;
+ user_srunhost = user_shost;
+
+ /* Fill in user_args from argv. */
+ if (argc > 0) {
+ char *to, **from;
+ size_t size, n;
+
+ for (size = 0, from = argv; *from; from++)
+ size += strlen(*from) + 1;
+
+ if ((user_args = malloc(size)) == NULL)
+ sudo_fatalx(U_("%s: %s"), __func__, U_("unable to allocate memory"));
+ for (to = user_args, from = argv; *from; from++) {
+ n = strlcpy(to, *from, size - (to - user_args));
+ if (n >= size - (to - user_args))
+ sudo_fatalx(U_("internal error, %s overflow"), getprogname());
+ to += n;
+ *to++ = ' ';
+ }
+ *--to = '\0';
+ }
+
+ /* Initialize default values. */
+ if (!init_defaults())
+ sudo_fatalx("%s", U_("unable to initialize sudoers default values"));
+
+ /* Set group_plugin callback. */
+ sudo_defs_table[I_GROUP_PLUGIN].callback = cb_group_plugin;
+
+ /* Set runas callback. */
+ sudo_defs_table[I_RUNAS_DEFAULT].callback = cb_runas_default;
+
+ /* Set locale callback. */
+ sudo_defs_table[I_SUDOERS_LOCALE].callback = sudoers_locale_callback;
+
+ /* Load ip addr/mask for each interface. */
+ if (get_net_ifs(&p) > 0) {
+ if (!set_interfaces(p))
+ sudo_fatal("%s", U_("unable to parse network address list"));
+ }
+
+ /* Allocate space for data structures in the parser. */
+ init_parser("sudoers", false, true);
+
+ /*
+ * Set runas passwd/group entries based on command line or sudoers.
+ * Note that if runas_group was specified without runas_user we
+ * run the command as the invoking user.
+ */
+ if (runas_group != NULL) {
+ set_runasgr(runas_group);
+ set_runaspw(runas_user ? runas_user : user_name);
+ } else
+ set_runaspw(runas_user ? runas_user : def_runas_default);
+
+ /* Parse the policy file. */
+ sudoers_setlocale(SUDOERS_LOCALE_SUDOERS, NULL);
+ switch (input_format) {
+ case format_ldif:
+ if (!sudoers_parse_ldif(&parsed_policy, stdin, NULL, true)) {
+ (void) puts("Parse error in LDIF");
+ parse_error = true;
+ }
+ break;
+ case format_sudoers:
+ if (sudoersparse() != 0)
+ parse_error = true;
+ break;
+ default:
+ sudo_fatalx("error: unhandled input %d", input_format);
+ }
+ if (!update_defaults(&parsed_policy, NULL, SETDEF_ALL, false))
+ parse_error = true;
+
+ if (!parse_error)
+ (void) puts("Parses OK");
+
+ if (dflag) {
+ (void) putchar('\n');
+ dump_sudoers(&lbuf);
+ if (argc < 2) {
+ exitcode = parse_error ? 1 : 0;
+ goto done;
+ }
+ }
+
+ /* This loop must match the one in sudo_file_lookup() */
+ printf("\nEntries for user %s:\n", user_name);
+ match = UNSPEC;
+ TAILQ_FOREACH_REVERSE(us, &parsed_policy.userspecs, userspec_list, entries) {
+ if (userlist_matches(&parsed_policy, sudo_user.pw, &us->users) != ALLOW)
+ continue;
+ TAILQ_FOREACH_REVERSE(priv, &us->privileges, privilege_list, entries) {
+ sudo_lbuf_append(&lbuf, "\n");
+ sudoers_format_privilege(&lbuf, &parsed_policy, priv, false);
+ sudo_lbuf_print(&lbuf);
+ host_match = hostlist_matches(&parsed_policy, sudo_user.pw,
+ &priv->hostlist);
+ if (host_match == ALLOW) {
+ puts("\thost matched");
+ TAILQ_FOREACH_REVERSE(cs, &priv->cmndlist, cmndspec_list, entries) {
+ runas_match = runaslist_matches(&parsed_policy,
+ cs->runasuserlist, cs->runasgrouplist, NULL, NULL);
+ if (runas_match == ALLOW) {
+ puts("\trunas matched");
+ cmnd_match = cmnd_matches(&parsed_policy, cs->cmnd,
+ cs->runchroot, NULL);
+ if (cmnd_match != UNSPEC)
+ match = cmnd_match;
+ printf("\tcmnd %s\n", match == ALLOW ? "allowed" :
+ match == DENY ? "denied" : "unmatched");
+ }
+ }
+ } else
+ puts(U_("\thost unmatched"));
+ }
+ }
+ puts(match == ALLOW ? U_("\nCommand allowed") :
+ match == DENY ? U_("\nCommand denied") : U_("\nCommand unmatched"));
+
+ /*
+ * Exit codes:
+ * 0 - parsed OK and command matched.
+ * 1 - parse error
+ * 2 - command not matched
+ * 3 - command denied
+ */
+ exitcode = parse_error ? 1 : (match == ALLOW ? 0 : match + 3);
+done:
+ sudo_lbuf_destroy(&lbuf);
+ sudo_freepwcache();
+ sudo_freegrcache();
+ sudo_debug_exit_int(__func__, __FILE__, __LINE__, sudo_debug_subsys, exitcode);
+ exit(exitcode);
+}
+
+static void
+set_runaspw(const char *user)
+{
+ struct passwd *pw = NULL;
+ debug_decl(set_runaspw, SUDOERS_DEBUG_UTIL);
+
+ if (*user == '#') {
+ const char *errstr;
+ uid_t uid = sudo_strtoid(user + 1, &errstr);
+ if (errstr == NULL) {
+ if ((pw = sudo_getpwuid(uid)) == NULL)
+ pw = sudo_fakepwnam(user, user_gid);
+ }
+ }
+ if (pw == NULL) {
+ if ((pw = sudo_getpwnam(user)) == NULL)
+ sudo_fatalx(U_("unknown user %s"), user);
+ }
+ if (runas_pw != NULL)
+ sudo_pw_delref(runas_pw);
+ runas_pw = pw;
+ debug_return;
+}
+
+static void
+set_runasgr(const char *group)
+{
+ struct group *gr = NULL;
+ debug_decl(set_runasgr, SUDOERS_DEBUG_UTIL);
+
+ if (*group == '#') {
+ const char *errstr;
+ gid_t gid = sudo_strtoid(group + 1, &errstr);
+ if (errstr == NULL) {
+ if ((gr = sudo_getgrgid(gid)) == NULL)
+ gr = sudo_fakegrnam(group);
+ }
+ }
+ if (gr == NULL) {
+ if ((gr = sudo_getgrnam(group)) == NULL)
+ sudo_fatalx(U_("unknown group %s"), group);
+ }
+ if (runas_gr != NULL)
+ sudo_gr_delref(runas_gr);
+ runas_gr = gr;
+ debug_return;
+}
+
+/*
+ * Callback for runas_default sudoers setting.
+ */
+static bool
+cb_runas_default(const char *file, int line, int column,
+ const union sudo_defs_val *sd_un, int op)
+{
+ /* Only reset runaspw if user didn't specify one. */
+ if (!runas_user && !runas_group)
+ set_runaspw(sd_un->str);
+ return true;
+}
+
+void
+sudo_setspent(void)
+{
+ return;
+}
+
+void
+sudo_endspent(void)
+{
+ return;
+}
+
+FILE *
+open_sudoers(const char *file, bool doedit, bool *keepopen)
+{
+ struct stat sb;
+ FILE *fp = NULL;
+ const char *base;
+ int error, fd;
+ debug_decl(open_sudoers, SUDOERS_DEBUG_UTIL);
+
+ /* Report errors using the basename for consistent test output. */
+ base = sudo_basename(file);
+ fd = sudo_secure_open_file(file, sudoers_uid, sudoers_gid, &sb, &error);
+ if (fd != -1) {
+ if ((fp = fdopen(fd, "r")) == NULL) {
+ sudo_warn("unable to open %s", base);
+ close(fd);
+ }
+ } else {
+ switch (error) {
+ case SUDO_PATH_MISSING:
+ sudo_warn("unable to open %s", base);
+ break;
+ case SUDO_PATH_BAD_TYPE:
+ sudo_warnx("%s is not a regular file", base);
+ break;
+ case SUDO_PATH_WRONG_OWNER:
+ sudo_warnx("%s should be owned by uid %u",
+ base, (unsigned int) sudoers_uid);
+ break;
+ case SUDO_PATH_WORLD_WRITABLE:
+ sudo_warnx("%s is world writable", base);
+ break;
+ case SUDO_PATH_GROUP_WRITABLE:
+ sudo_warnx("%s should be owned by gid %u",
+ base, (unsigned int) sudoers_gid);
+ break;
+ default:
+ sudo_warnx("%s: internal error, unexpected error %d",
+ __func__, error);
+ break;
+ }
+ }
+
+ debug_return_ptr(fp);
+}
+
+bool
+init_envtables(void)
+{
+ return(true);
+}
+
+bool
+set_perms(int perm)
+{
+ return true;
+}
+
+bool
+restore_perms(void)
+{
+ return true;
+}
+
+void
+init_eventlog_config(void)
+{
+ return;
+}
+
+int
+set_cmnd_path(const char *runchroot)
+{
+ /* Reallocate user_cmnd to catch bugs in command_matches(). */
+ char *new_cmnd = strdup(orig_cmnd);
+ if (new_cmnd == NULL)
+ return NOT_FOUND_ERROR;
+ free(user_cmnd);
+ user_cmnd = new_cmnd;
+ return FOUND;
+}
+
+static bool
+print_defaults(struct sudo_lbuf *lbuf)
+{
+ struct defaults *def, *next;
+ debug_decl(print_defaults, SUDOERS_DEBUG_UTIL);
+
+ TAILQ_FOREACH_SAFE(def, &parsed_policy.defaults, entries, next)
+ sudoers_format_default_line(lbuf, &parsed_policy, def, &next, false);
+
+ debug_return_bool(!sudo_lbuf_error(lbuf));
+}
+
+static int
+print_alias(struct sudoers_parse_tree *parse_tree, struct alias *a, void *v)
+{
+ struct sudo_lbuf *lbuf = v;
+ struct member *m;
+ debug_decl(print_alias, SUDOERS_DEBUG_UTIL);
+
+ sudo_lbuf_append(lbuf, "%s %s = ", alias_type_to_string(a->type),
+ a->name);
+ TAILQ_FOREACH(m, &a->members, entries) {
+ if (m != TAILQ_FIRST(&a->members))
+ sudo_lbuf_append(lbuf, ", ");
+ sudoers_format_member(lbuf, parse_tree, m, NULL, UNSPEC);
+ }
+ sudo_lbuf_append(lbuf, "\n");
+
+ debug_return_int(sudo_lbuf_error(lbuf) ? -1 : 0);
+}
+
+static bool
+print_aliases(struct sudo_lbuf *lbuf)
+{
+ debug_decl(print_aliases, SUDOERS_DEBUG_UTIL);
+
+ alias_apply(&parsed_policy, print_alias, lbuf);
+
+ debug_return_bool(!sudo_lbuf_error(lbuf));
+}
+
+static void
+dump_sudoers(struct sudo_lbuf *lbuf)
+{
+ debug_decl(dump_sudoers, SUDOERS_DEBUG_UTIL);
+
+ /* Print Defaults */
+ if (!print_defaults(lbuf))
+ goto done;
+ if (lbuf->len > 0) {
+ sudo_lbuf_print(lbuf);
+ sudo_lbuf_append(lbuf, "\n");
+ }
+
+ /* Print Aliases */
+ if (!print_aliases(lbuf))
+ goto done;
+ if (lbuf->len > 1) {
+ sudo_lbuf_print(lbuf);
+ sudo_lbuf_append(lbuf, "\n");
+ }
+
+ /* Print User_Specs */
+ if (!sudoers_format_userspecs(lbuf, &parsed_policy, NULL, false, true))
+ goto done;
+ if (lbuf->len > 1) {
+ sudo_lbuf_print(lbuf);
+ }
+
+done:
+ if (sudo_lbuf_error(lbuf)) {
+ if (errno == ENOMEM)
+ sudo_fatalx(U_("%s: %s"), __func__, U_("unable to allocate memory"));
+ }
+
+ debug_return;
+}
+
+static int
+testsudoers_output(const char *buf)
+{
+ return fputs(buf, stdout);
+}
+
+static int
+testsudoers_error(const char *buf)
+{
+ return fputs(buf, stderr);
+}
+
+static void
+usage(void)
+{
+ (void) fprintf(stderr, "usage: %s [-dt] [-G sudoers_gid] [-g group] [-h host] [-i input_format] [-P grfile] [-p pwfile] [-U sudoers_uid] [-u user] <user> <command> [args]\n", getprogname());
+ exit(EXIT_FAILURE);
+}
generated by cgit v1.2.3 (git 2.39.1) at 2024-11-21 14:27:40 +0000