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-rw-r--r--plugins/sudoers/cvtsudoers.c1556
1 files changed, 1556 insertions, 0 deletions
diff --git a/plugins/sudoers/cvtsudoers.c b/plugins/sudoers/cvtsudoers.c
new file mode 100644
index 0000000..e1db214
--- /dev/null
+++ b/plugins/sudoers/cvtsudoers.c
@@ -0,0 +1,1556 @@
+/*
+ * SPDX-License-Identifier: ISC
+ *
+ * Copyright (c) 2018-2023 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.
+ */
+
+/*
+ * 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
+ */
+
+/*
+ * Convert from the sudoers file format to LDIF or JSON format.
+ */
+
+#include <config.h>
+
+#include <stdio.h>
+#include <stdlib.h>
+#include <string.h>
+#ifdef HAVE_STRINGS_H
+# include <strings.h>
+#endif /* HAVE_STRINGS_H */
+#include <ctype.h>
+#include <errno.h>
+#include <fcntl.h>
+#include <pwd.h>
+#include <unistd.h>
+#ifdef HAVE_GETOPT_LONG
+# include <getopt.h>
+# else
+# include <compat/getopt.h>
+#endif /* HAVE_GETOPT_LONG */
+
+#include <sudoers.h>
+#include <sudoers_version.h>
+#include <sudo_lbuf.h>
+#include <redblack.h>
+#include <cvtsudoers.h>
+#include <testsudoers_pwutil.h>
+#include <tsgetgrpw.h>
+#include <gram.h>
+
+/* Long-only options values. */
+#define OPT_GROUP_FILE 256
+#define OPT_PASSWD_FILE 257
+
+/*
+ * Globals
+ */
+struct cvtsudoers_filter *filters;
+static FILE *logfp;
+static const char short_opts[] = "b:c:d:ef:hi:I:l:m:Mo:O:pP:s:V";
+static struct option long_opts[] = {
+ { "base", required_argument, NULL, 'b' },
+ { "config", required_argument, NULL, 'c' },
+ { "defaults", required_argument, NULL, 'd' },
+ { "expand-aliases", no_argument, NULL, 'e' },
+ { "output-format", required_argument, NULL, 'f' },
+ { "help", no_argument, NULL, 'h' },
+ { "input-format", required_argument, NULL, 'i' },
+ { "increment", required_argument, NULL, 'I' },
+ { "logfile", required_argument, NULL, 'l' },
+ { "match", required_argument, NULL, 'm' },
+ { "match-local", no_argument, NULL, 'M' },
+ { "prune-matches", no_argument, NULL, 'p' },
+ { "padding", required_argument, NULL, 'P' },
+ { "order-start", required_argument, NULL, 'O' },
+ { "output", required_argument, NULL, 'o' },
+ { "suppress", required_argument, NULL, 's' },
+ { "version", no_argument, NULL, 'V' },
+ { "group-file", required_argument, NULL, OPT_GROUP_FILE },
+ { "passwd-file", required_argument, NULL, OPT_PASSWD_FILE },
+ { NULL, no_argument, NULL, 0 },
+};
+
+sudo_dso_public int main(int argc, char *argv[]);
+static bool convert_sudoers_sudoers(struct sudoers_parse_tree *parse_tree, const char *output_file, struct cvtsudoers_config *conf);
+static bool parse_sudoers(struct sudoers_context *ctx, const char *input_file, struct cvtsudoers_config *conf);
+static bool parse_ldif(struct sudoers_parse_tree *parse_tree, const char *input_file, struct cvtsudoers_config *conf);
+static bool cvtsudoers_parse_filter(char *expression);
+static struct cvtsudoers_config *cvtsudoers_conf_read(const char *conf_file);
+static void cvtsudoers_conf_free(struct cvtsudoers_config *conf);
+static unsigned int cvtsudoers_parse_defaults(char *expression);
+static unsigned int cvtsudoers_parse_suppression(char *expression);
+static void filter_userspecs(struct sudoers_parse_tree *parse_tree, struct cvtsudoers_config *conf);
+static void filter_defaults(struct sudoers_parse_tree *parse_tree, struct cvtsudoers_config *conf);
+static void alias_remove_unused(struct sudoers_parse_tree *parse_tree);
+static void alias_prune(struct sudoers_parse_tree *parse_tree, struct cvtsudoers_config *conf);
+sudo_noreturn static void help(void);
+sudo_noreturn static void usage(void);
+
+int
+main(int argc, char *argv[])
+{
+ struct sudoers_parse_tree_list parse_trees = TAILQ_HEAD_INITIALIZER(parse_trees);
+ struct sudoers_context ctx = SUDOERS_CONTEXT_INITIALIZER;
+ struct sudoers_parse_tree merged_tree, *parse_tree = NULL;
+ struct cvtsudoers_config *conf = NULL;
+ enum sudoers_formats output_format = format_ldif;
+ enum sudoers_formats input_format = format_sudoers;
+ const char *input_file = "-";
+ const char *output_file = "-";
+ const char *conf_file = NULL;
+ const char *grfile = NULL, *pwfile = NULL;
+ const char *cp, *errstr;
+ int ch, exitcode = EXIT_FAILURE;
+ bool match_local = false;
+ debug_decl(main, SUDOERS_DEBUG_MAIN);
+
+#if defined(SUDO_DEVEL) && defined(__OpenBSD__)
+ {
+ extern char *malloc_options;
+ malloc_options = "S";
+ }
+#endif
+
+ initprogname(argc > 0 ? argv[0] : "cvtsudoers");
+ 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);
+ textdomain("sudoers");
+
+ /* Initialize early, before any "goto done". */
+ init_parse_tree(&merged_tree, NULL, NULL, &ctx, NULL);
+
+ /* Read debug and plugin sections of sudo.conf. */
+ if (sudo_conf_read(NULL, SUDO_CONF_DEBUG|SUDO_CONF_PLUGINS) == -1)
+ goto done;
+
+ /* Initialize the debug subsystem. */
+ if (!sudoers_debug_register(getprogname(), sudo_conf_debug_files(getprogname())))
+ goto done;
+
+ /* Check for --config option first (no getopt warnings). */
+ opterr = 0;
+ while ((ch = getopt_long(argc, argv, short_opts, long_opts, NULL)) != -1) {
+ switch (ch) {
+ case 'c':
+ conf_file = optarg;
+ break;
+ }
+ }
+
+ /* Read conf file. */
+ conf = cvtsudoers_conf_read(conf_file);
+
+ /*
+ * Reset getopt and handle the rest of the arguments.
+ */
+ opterr = 1;
+ optind = 1;
+#ifdef HAVE_OPTRESET
+ optreset = 1;
+#endif
+ while ((ch = getopt_long(argc, argv, short_opts, long_opts, NULL)) != -1) {
+ switch (ch) {
+ case 'b':
+ free(conf->sudoers_base);
+ conf->sudoers_base = strdup(optarg);
+ if (conf->sudoers_base == NULL) {
+ sudo_fatalx(U_("%s: %s"), __func__,
+ U_("unable to allocate memory"));
+ }
+ break;
+ case 'c':
+ /* handled above */
+ break;
+ case 'd':
+ conf->defstr = optarg;
+ break;
+ case 'e':
+ conf->expand_aliases = true;
+ break;
+ case 'f':
+ free(conf->output_format);
+ conf->output_format = strdup(optarg);
+ if (conf->output_format == NULL) {
+ sudo_fatalx(U_("%s: %s"), __func__,
+ U_("unable to allocate memory"));
+ }
+ break;
+ case 'h':
+ help();
+ /* NOTREACHED */
+ case 'i':
+ free(conf->input_format);
+ conf->input_format = strdup(optarg);
+ if (conf->input_format == NULL) {
+ sudo_fatalx(U_("%s: %s"), __func__,
+ U_("unable to allocate memory"));
+ }
+ break;
+ case 'I':
+ conf->order_increment =
+ (unsigned int)sudo_strtonum(optarg, 1, UINT_MAX, &errstr);
+ if (errstr != NULL) {
+ sudo_warnx(U_("order increment: %s: %s"), optarg, U_(errstr));
+ usage();
+ }
+ break;
+ case 'l':
+ conf->logfile = optarg;
+ break;
+ case 'm':
+ conf->filter = optarg;
+ break;
+ case 'M':
+ match_local = true;
+ break;
+ case 'o':
+ output_file = optarg;
+ break;
+ case 'O':
+ conf->sudo_order =
+ (unsigned int)sudo_strtonum(optarg, 0, UINT_MAX, &errstr);
+ if (errstr != NULL) {
+ sudo_warnx(U_("starting order: %s: %s"), optarg, U_(errstr));
+ usage();
+ }
+ break;
+ case 'p':
+ conf->prune_matches = true;
+ break;
+ case 'P':
+ conf->order_padding =
+ (unsigned int)sudo_strtonum(optarg, 1, UINT_MAX, &errstr);
+ if (errstr != NULL ) {
+ sudo_warnx(U_("order padding: %s: %s"), optarg, U_(errstr));
+ usage();
+ }
+ break;
+ case 's':
+ conf->supstr = optarg;
+ break;
+ case 'V':
+ (void) printf(_("%s version %s\n"), getprogname(),
+ PACKAGE_VERSION);
+ (void) printf(_("%s grammar version %d\n"), getprogname(),
+ SUDOERS_GRAMMAR_VERSION);
+ exitcode = EXIT_SUCCESS;
+ goto done;
+ case OPT_GROUP_FILE:
+ grfile = optarg;
+ break;
+ case OPT_PASSWD_FILE:
+ pwfile = optarg;
+ break;
+ default:
+ usage();
+ /* NOTREACHED */
+ }
+ }
+ argc -= optind;
+ argv += optind;
+
+ if (conf->logfile != NULL) {
+ logfp = fopen(conf->logfile, "w");
+ if (logfp == NULL)
+ sudo_fatalx(U_("unable to open log file %s"), conf->logfile);
+ }
+
+ if (conf->input_format != NULL) {
+ if (strcasecmp(conf->input_format, "ldif") == 0) {
+ input_format = format_ldif;
+ } else if (strcasecmp(conf->input_format, "sudoers") == 0) {
+ input_format = format_sudoers; // -V1048
+ } else {
+ sudo_warnx(U_("unsupported input format %s"), conf->input_format);
+ usage();
+ }
+ }
+ if (conf->output_format != NULL) {
+ if (strcasecmp(conf->output_format, "csv") == 0) {
+ output_format = format_csv;
+ conf->store_options = true;
+ } else if (strcasecmp(conf->output_format, "json") == 0) {
+ output_format = format_json;
+ conf->store_options = true;
+ } else if (strcasecmp(conf->output_format, "ldif") == 0) {
+ output_format = format_ldif; // -V1048
+ conf->store_options = true;
+ } else if (strcasecmp(conf->output_format, "sudoers") == 0) {
+ output_format = format_sudoers;
+ conf->store_options = false;
+ } else {
+ sudo_warnx(U_("unsupported output format %s"), conf->output_format);
+ usage();
+ }
+ }
+ if (conf->filter != NULL) {
+ /* We always expand aliases when filtering (may change in future). */
+ if (!cvtsudoers_parse_filter(conf->filter))
+ usage();
+ }
+ if (conf->defstr != NULL) {
+ conf->defaults = cvtsudoers_parse_defaults(conf->defstr);
+ if (conf->defaults == (unsigned int)-1)
+ usage();
+ }
+ if (conf->supstr != NULL) {
+ conf->suppress = cvtsudoers_parse_suppression(conf->supstr);
+ if (conf->suppress == (unsigned int)-1)
+ usage();
+ }
+
+ /* Apply padding to sudo_order if present. */
+ if (conf->sudo_order != 0 && conf->order_padding != 0) {
+ unsigned int multiplier = 1;
+
+ do {
+ multiplier *= 10;
+ } while (--conf->order_padding != 0);
+ conf->sudo_order *= multiplier;
+ conf->order_max = conf->sudo_order + (multiplier - 1);
+ conf->order_padding = multiplier;
+ }
+
+ /* If no base DN specified, check SUDOERS_BASE. */
+ if (conf->sudoers_base == NULL) {
+ conf->sudoers_base = getenv("SUDOERS_BASE");
+ if (conf->sudoers_base != NULL && *conf->sudoers_base != '\0') {
+ if ((conf->sudoers_base = strdup(conf->sudoers_base)) == NULL) {
+ sudo_fatalx(U_("%s: %s"), __func__,
+ U_("unable to allocate memory"));
+ }
+ }
+ }
+
+ /* Set pwutil backend to use the filter data. */
+ if (conf->filter != NULL && !match_local) {
+ sudo_pwutil_set_backend(cvtsudoers_make_pwitem, cvtsudoers_make_gritem,
+ cvtsudoers_make_gidlist_item, cvtsudoers_make_grlist_item, NULL);
+ } else {
+ if (grfile != NULL)
+ testsudoers_setgrfile(grfile);
+ if (pwfile != NULL)
+ testsudoers_setpwfile(pwfile);
+ sudo_pwutil_set_backend(
+ pwfile ? testsudoers_make_pwitem : NULL,
+ grfile ? testsudoers_make_gritem : NULL,
+ grfile ? testsudoers_make_gidlist_item : NULL,
+ grfile ? testsudoers_make_grlist_item : NULL,
+ NULL);
+ }
+
+ /* We may need the hostname to resolve %h escapes in include files. */
+ if (!sudoers_sethost(&ctx, NULL, NULL))
+ goto done;
+
+ do {
+ char *lhost = NULL, *shost = NULL;
+
+ /* Input file (defaults to stdin). */
+ if (argc > 0)
+ input_file = argv[0];
+
+ /* Check for optional hostname prefix on the input file. */
+ cp = strchr(input_file, ':');
+ if (cp != NULL) {
+ struct stat sb;
+
+ if (strcmp(cp, ":-") == 0 || stat(input_file, &sb) == -1) {
+ lhost = strndup(input_file, (size_t)(cp - input_file));
+ if (lhost == NULL)
+ sudo_fatalx("%s", U_("unable to allocate memory"));
+ input_file = cp + 1;
+ cp = strchr(lhost, '.');
+ if (cp == NULL) {
+ shost = lhost;
+ } else {
+ shost = strndup(lhost, (size_t)(cp - lhost));
+ }
+ }
+ }
+
+ if (strcmp(input_file, "-") != 0) {
+ if (strcmp(input_file, output_file) == 0) {
+ sudo_fatalx(U_("%s: input and output files must be different"),
+ input_file);
+ }
+ }
+
+ parse_tree = malloc(sizeof(*parse_tree));
+ if (parse_tree == NULL)
+ sudo_fatalx("%s", U_("unable to allocate memory"));
+ init_parse_tree(parse_tree, lhost, shost, &ctx, NULL);
+ TAILQ_INSERT_TAIL(&parse_trees, parse_tree, entries);
+
+ /* Setup defaults data structures. */
+ if (!init_defaults()) {
+ sudo_fatalx("%s",
+ U_("unable to initialize sudoers default values"));
+ }
+
+ switch (input_format) {
+ case format_ldif:
+ if (!parse_ldif(parse_tree, input_file, conf))
+ goto done;
+ break;
+ case format_sudoers:
+ if (!parse_sudoers(&ctx, input_file, conf))
+ goto done;
+ reparent_parse_tree(parse_tree);
+ break;
+ default:
+ sudo_fatalx("error: unhandled input %d", input_format);
+ }
+
+ /* Apply filters. */
+ filter_userspecs(parse_tree, conf);
+ filter_defaults(parse_tree, conf);
+ if (filters != NULL) {
+ alias_remove_unused(parse_tree);
+ if (conf->prune_matches && conf->expand_aliases)
+ alias_prune(parse_tree, conf);
+ }
+
+ argc--;
+ argv++;
+ } while (argc > 0);
+
+ parse_tree = TAILQ_FIRST(&parse_trees);
+ if (TAILQ_NEXT(parse_tree, entries)) {
+ /* Multiple sudoers files, merge them all. */
+ parse_tree = merge_sudoers(&parse_trees, &merged_tree);
+ }
+
+ switch (output_format) {
+ case format_csv:
+ exitcode = !convert_sudoers_csv(parse_tree, output_file, conf);
+ break;
+ case format_json:
+ exitcode = !convert_sudoers_json(parse_tree, output_file, conf);
+ break;
+ case format_ldif:
+ exitcode = !convert_sudoers_ldif(parse_tree, output_file, conf);
+ break;
+ case format_sudoers:
+ exitcode = !convert_sudoers_sudoers(parse_tree, output_file, conf);
+ break;
+ default:
+ sudo_fatalx("error: unhandled output format %d", output_format);
+ }
+
+done:
+ sudoers_ctx_free(&ctx);
+ free_parse_tree(&merged_tree);
+ while ((parse_tree = TAILQ_FIRST(&parse_trees)) != NULL) {
+ TAILQ_REMOVE(&parse_trees, parse_tree, entries);
+ free_parse_tree(parse_tree);
+ free(parse_tree);
+ }
+ cvtsudoers_conf_free(conf);
+ sudo_debug_exit_int(__func__, __FILE__, __LINE__, sudo_debug_subsys, exitcode);
+ return exitcode;
+}
+
+void
+log_warnx(const char * restrict fmt, ...)
+{
+ va_list ap;
+
+ va_start(ap, fmt);
+ if (logfp != NULL) {
+ vfprintf(logfp, fmt, ap);
+ fputc('\n', logfp);
+ } else {
+ sudo_vwarnx_nodebug(fmt, ap);
+ }
+ va_end(ap);
+}
+
+/*
+ * cvtsudoers configuration data.
+ */
+static struct cvtsudoers_config cvtsudoers_config = INITIAL_CONFIG;
+static struct cvtsudoers_conf_table cvtsudoers_conf_vars[] = {
+ { "order_start", CONF_UINT, &cvtsudoers_config.sudo_order },
+ { "order_increment", CONF_UINT, &cvtsudoers_config.order_increment },
+ { "order_padding", CONF_UINT, &cvtsudoers_config.order_padding },
+ { "sudoers_base", CONF_STR, &cvtsudoers_config.sudoers_base },
+ { "input_format", CONF_STR, &cvtsudoers_config.input_format },
+ { "output_format", CONF_STR, &cvtsudoers_config.output_format },
+ { "match", CONF_STR, &cvtsudoers_config.filter },
+ { "match_local", CONF_BOOL, &cvtsudoers_config.match_local },
+ { "logfile", CONF_STR, &cvtsudoers_config.logfile },
+ { "defaults", CONF_STR, &cvtsudoers_config.defstr },
+ { "suppress", CONF_STR, &cvtsudoers_config.supstr },
+ { "group_file", CONF_STR, &cvtsudoers_config.group_file },
+ { "passwd_file", CONF_STR, &cvtsudoers_config.passwd_file },
+ { "expand_aliases", CONF_BOOL, &cvtsudoers_config.expand_aliases },
+ { "prune_matches", CONF_BOOL, &cvtsudoers_config.prune_matches }
+};
+
+/*
+ * Look up keyword in config table.
+ * Returns true if found, else false.
+ */
+static bool
+cvtsudoers_parse_keyword(const char *conf_file, const char *keyword,
+ const char *value, struct cvtsudoers_conf_table *table)
+{
+ struct cvtsudoers_conf_table *cur;
+ const char *errstr;
+ debug_decl(sudo_ldap_parse_keyword, SUDOERS_DEBUG_UTIL);
+
+ /* Look up keyword in config tables */
+ for (cur = table; cur->conf_str != NULL; cur++) {
+ if (strcasecmp(keyword, cur->conf_str) == 0) {
+ switch (cur->type) {
+ case CONF_BOOL:
+ *(bool *)(cur->valp) = sudo_strtobool(value) == true;
+ break;
+ case CONF_UINT:
+ {
+ unsigned int uval =
+ (unsigned int)sudo_strtonum(value, 0, UINT_MAX, &errstr);
+ if (errstr != NULL) {
+ sudo_warnx(U_("%s: %s: %s: %s"),
+ conf_file, keyword, value, U_(errstr));
+ continue;
+ }
+ *(unsigned int *)(cur->valp) = uval;
+ }
+ break;
+ case CONF_STR:
+ {
+ char *cp = strdup(value);
+ if (cp == NULL) {
+ sudo_fatalx(U_("%s: %s"), __func__,
+ U_("unable to allocate memory"));
+ }
+ free(*(char **)(cur->valp));
+ *(char **)(cur->valp) = cp;
+ break;
+ }
+ }
+ debug_return_bool(true);
+ }
+ }
+ debug_return_bool(false);
+}
+
+static struct cvtsudoers_config *
+cvtsudoers_conf_read(const char *path)
+{
+ char conf_file[PATH_MAX], *line = NULL;
+ size_t linesize = 0;
+ FILE *fp = NULL;
+ int fd = -1;
+ debug_decl(cvtsudoers_conf_read, SUDOERS_DEBUG_UTIL);
+
+ if (path != NULL) {
+ /* Empty string means use the defaults. */
+ if (*path == '\0')
+ debug_return_ptr(&cvtsudoers_config);
+ if (strlcpy(conf_file, path, sizeof(conf_file)) >= sizeof(conf_file))
+ errno = ENAMETOOLONG;
+ else
+ fd = open(conf_file, O_RDONLY);
+ } else {
+ fd = sudo_open_conf_path(_PATH_CVTSUDOERS_CONF, conf_file,
+ sizeof(conf_file), NULL);
+ }
+ if (fd != -1)
+ fp = fdopen(fd, "r");
+ if (fp == NULL) {
+ if (path != NULL || errno != ENOENT)
+ sudo_warn("%s", conf_file);
+ debug_return_ptr(&cvtsudoers_config);
+ }
+
+ while (sudo_parseln(&line, &linesize, NULL, fp, 0) != -1) {
+ char *keyword, *value;
+ size_t len;
+
+ if (*line == '\0')
+ continue; /* skip empty line */
+
+ /* Parse keyword = value */
+ keyword = line;
+ if ((value = strchr(line, '=')) == NULL || value == line)
+ continue;
+ len = (size_t)(value - line);
+
+ /* Trim whitespace after keyword and NUL-terminate. */
+ while (len > 0 && isblank((unsigned char)line[len - 1]))
+ len--;
+ line[len] = '\0';
+
+ /* Trim whitespace before value. */
+ do {
+ value++;
+ } while (isblank((unsigned char)*value));
+
+ /* Look up keyword in config tables */
+ if (!cvtsudoers_parse_keyword(conf_file, keyword, value, cvtsudoers_conf_vars))
+ sudo_warnx(U_("%s: unknown key word %s"), conf_file, keyword);
+ }
+ free(line);
+ fclose(fp);
+
+ debug_return_ptr(&cvtsudoers_config);
+}
+
+static void
+cvtsudoers_conf_free(struct cvtsudoers_config *conf)
+{
+ debug_decl(cvtsudoers_conf_free, SUDOERS_DEBUG_UTIL);
+
+ if (conf != NULL) {
+ free(conf->sudoers_base);
+ free(conf->input_format);
+ free(conf->output_format);
+ conf->sudoers_base = NULL;
+ conf->input_format = NULL;
+ conf->output_format = NULL;
+ }
+
+ debug_return;
+}
+
+static unsigned int
+cvtsudoers_parse_defaults(char *expression)
+{
+ char *last, *cp = expression;
+ unsigned int flags = 0;
+ debug_decl(cvtsudoers_parse_defaults, SUDOERS_DEBUG_UTIL);
+
+ for ((cp = strtok_r(cp, ",", &last)); cp != NULL; (cp = strtok_r(NULL, ",", &last))) {
+ if (strcasecmp(cp, "all") == 0) {
+ SET(flags, CVT_DEFAULTS_ALL);
+ } else if (strcasecmp(cp, "global") == 0) {
+ SET(flags, CVT_DEFAULTS_GLOBAL);
+ } else if (strcasecmp(cp, "user") == 0) {
+ SET(flags, CVT_DEFAULTS_USER);
+ } else if (strcasecmp(cp, "runas") == 0) {
+ SET(flags, CVT_DEFAULTS_RUNAS);
+ } else if (strcasecmp(cp, "host") == 0) {
+ SET(flags, CVT_DEFAULTS_HOST);
+ } else if (strcasecmp(cp, "command") == 0) {
+ SET(flags, CVT_DEFAULTS_CMND);
+ } else {
+ sudo_warnx(U_("invalid defaults type: %s"), cp);
+ debug_return_uint((unsigned int)-1);
+ }
+ }
+
+ debug_return_uint(flags);
+}
+
+static unsigned int
+cvtsudoers_parse_suppression(char *expression)
+{
+ char *last, *cp = expression;
+ unsigned int flags = 0;
+ debug_decl(cvtsudoers_parse_suppression, SUDOERS_DEBUG_UTIL);
+
+ for ((cp = strtok_r(cp, ",", &last)); cp != NULL; (cp = strtok_r(NULL, ",", &last))) {
+ if (strcasecmp(cp, "defaults") == 0) {
+ SET(flags, SUPPRESS_DEFAULTS);
+ } else if (strcasecmp(cp, "aliases") == 0) {
+ SET(flags, SUPPRESS_ALIASES);
+ } else if (strcasecmp(cp, "privileges") == 0 || strcasecmp(cp, "privs") == 0) {
+ SET(flags, SUPPRESS_PRIVS);
+ } else {
+ sudo_warnx(U_("invalid suppression type: %s"), cp);
+ debug_return_uint((unsigned int)-1);
+ }
+ }
+
+ debug_return_uint(flags);
+}
+
+static bool
+cvtsudoers_parse_filter(char *expression)
+{
+ char *last, *cp = expression;
+ debug_decl(cvtsudoers_parse_filter, SUDOERS_DEBUG_UTIL);
+
+ if (filters == NULL) {
+ if ((filters = malloc(sizeof(*filters))) == NULL) {
+ sudo_fatalx(U_("%s: %s"), __func__,
+ U_("unable to allocate memory"));
+ }
+ STAILQ_INIT(&filters->users);
+ STAILQ_INIT(&filters->groups);
+ STAILQ_INIT(&filters->hosts);
+ STAILQ_INIT(&filters->cmnds);
+ }
+
+ for ((cp = strtok_r(cp, ",", &last)); cp != NULL; (cp = strtok_r(NULL, ",", &last))) {
+ /*
+ * Filter expression:
+ * user=foo,group=bar,host=baz
+ */
+ char *keyword;
+ struct sudoers_string *s;
+
+ if ((s = malloc(sizeof(*s))) == NULL) {
+ sudo_fatalx(U_("%s: %s"), __func__,
+ U_("unable to allocate memory"));
+ }
+
+ /* Parse keyword = value */
+ keyword = cp;
+ if ((cp = strchr(cp, '=')) == NULL) {
+ sudo_warnx(U_("invalid filter: %s"), keyword);
+ free(s);
+ debug_return_bool(false);
+ }
+ *cp++ = '\0';
+ s->str = cp;
+
+ if (strcmp(keyword, "user") == 0) {
+ STAILQ_INSERT_TAIL(&filters->users, s, entries);
+ } else if (strcmp(keyword, "group") == 0) {
+ STAILQ_INSERT_TAIL(&filters->groups, s, entries);
+ } else if (strcmp(keyword, "host") == 0) {
+ STAILQ_INSERT_TAIL(&filters->hosts, s, entries);
+ } else if (strcmp(keyword, "cmnd") == 0 || strcmp(keyword, "cmd") == 0) {
+ STAILQ_INSERT_TAIL(&filters->cmnds, s, entries);
+ } else {
+ sudo_warnx(U_("invalid filter: %s"), keyword);
+ free(s);
+ debug_return_bool(false);
+ }
+ }
+
+ debug_return_bool(true);
+}
+
+static bool
+parse_ldif(struct sudoers_parse_tree *parse_tree, const char *input_file,
+ struct cvtsudoers_config *conf)
+{
+ FILE *fp = stdin;
+ bool ret = false;
+ debug_decl(parse_ldif, SUDOERS_DEBUG_UTIL);
+
+ /* Open LDIF file and parse it. */
+ if (strcmp(input_file, "-") != 0) {
+ if ((fp = fopen(input_file, "r")) == NULL)
+ sudo_warn(U_("unable to open %s"), input_file);
+ }
+ if (fp != NULL) {
+ ret = sudoers_parse_ldif(parse_tree, fp, conf->sudoers_base,
+ conf->store_options);
+ if (fp != stdin)
+ fclose(fp);
+ }
+ debug_return_bool(ret);
+}
+
+static bool
+parse_sudoers(struct sudoers_context *ctx, const char *input_file,
+ struct cvtsudoers_config *conf)
+{
+ debug_decl(parse_sudoers, SUDOERS_DEBUG_UTIL);
+
+ /* Open sudoers file and parse it. */
+ if (strcmp(input_file, "-") == 0) {
+ sudoersin = stdin;
+ input_file = "stdin";
+ } else if ((sudoersin = fopen(input_file, "r")) == NULL)
+ sudo_fatal(U_("unable to open %s"), input_file);
+ init_parser(ctx, input_file);
+ if (sudoersparse() && !parse_error) {
+ sudo_warnx(U_("failed to parse %s file, unknown error"), input_file);
+ parse_error = true;
+ }
+ debug_return_bool(!parse_error);
+}
+
+FILE *
+open_sudoers(const char *file, char **outfile, bool doedit, bool *keepopen)
+{
+ return fopen(file, "r");
+}
+
+static bool
+userlist_matches_filter(struct sudoers_parse_tree *parse_tree,
+ struct member_list *users, struct cvtsudoers_config *conf)
+{
+ struct sudoers_string *s;
+ struct member *m, *next;
+ bool ret = false;
+ debug_decl(userlist_matches_filter, SUDOERS_DEBUG_UTIL);
+
+ if (filters == NULL ||
+ (STAILQ_EMPTY(&filters->users) && STAILQ_EMPTY(&filters->groups)))
+ debug_return_bool(true);
+
+ TAILQ_FOREACH_REVERSE_SAFE(m, users, member_list, entries, next) {
+ bool matched = false;
+
+ if (STAILQ_EMPTY(&filters->users)) {
+ struct passwd pw;
+
+ /*
+ * Only groups in filter, make a fake user so userlist_matches()
+ * can do its thing.
+ */
+ memset(&pw, 0, sizeof(pw));
+ pw.pw_name = (char *)"_nobody";
+ pw.pw_uid = (uid_t)-1;
+ pw.pw_gid = (gid_t)-1;
+
+ if (user_matches(parse_tree, &pw, m) == ALLOW)
+ matched = true;
+ } else {
+ STAILQ_FOREACH(s, &filters->users, entries) {
+ struct passwd *pw = NULL;
+
+ /* An upper case filter entry may be a User_Alias */
+ /* XXX - doesn't handle nested aliases */
+ if (m->type == ALIAS && !conf->expand_aliases) {
+ if (strcmp(m->name, s->str) == 0) {
+ matched = true;
+ break;
+ }
+ }
+
+ if (s->str[0] == '#') {
+ const char *errstr;
+ uid_t uid = sudo_strtoid(s->str + 1, &errstr);
+ if (errstr == NULL)
+ pw = sudo_getpwuid(uid);
+ }
+ if (pw == NULL)
+ pw = sudo_getpwnam(s->str);
+ if (pw == NULL)
+ continue;
+
+ if (user_matches(parse_tree, pw, m) == ALLOW)
+ matched = true;
+ sudo_pw_delref(pw);
+
+ /* Only need one user in the filter to match. */
+ if (matched)
+ break;
+ }
+ }
+
+ if (matched) {
+ ret = true;
+ } else if (conf->prune_matches) {
+ TAILQ_REMOVE(users, m, entries);
+ free_member(m);
+ }
+ }
+
+ debug_return_bool(ret);
+}
+
+static bool
+hostlist_matches_filter(struct sudoers_parse_tree *parse_tree,
+ struct member_list *hostlist, struct cvtsudoers_config *conf)
+{
+ struct sudoers_string *s;
+ struct member *m, *next;
+ char *lhost, *shost;
+ bool ret = false;
+ char **shosts;
+ size_t n = 0;
+ debug_decl(hostlist_matches_filter, SUDOERS_DEBUG_UTIL);
+
+ if (filters == NULL || STAILQ_EMPTY(&filters->hosts))
+ debug_return_bool(true);
+
+ /* Create an array of short host names. */
+ STAILQ_FOREACH(s, &filters->hosts, entries) {
+ n++;
+ }
+ shosts = reallocarray(NULL, n, sizeof(char *));
+ if (shosts == NULL)
+ sudo_fatalx(U_("%s: %s"), __func__, U_("unable to allocate memory"));
+ n = 0;
+ STAILQ_FOREACH(s, &filters->hosts, entries) {
+ lhost = s->str;
+ if ((shost = strchr(lhost, '.')) != NULL) {
+ shost = strndup(lhost, (size_t)(shost - lhost));
+ if (shost == NULL) {
+ sudo_fatalx(U_("%s: %s"), __func__,
+ U_("unable to allocate memory"));
+ }
+ } else {
+ shost = lhost;
+ }
+ shosts[n++] = shost;
+ }
+
+ TAILQ_FOREACH_REVERSE_SAFE(m, hostlist, member_list, entries, next) {
+ bool matched = false;
+ n = 0;
+ STAILQ_FOREACH(s, &filters->hosts, entries) {
+ lhost = s->str;
+ shost = shosts[n++];
+
+ /* An upper case filter entry may be a Host_Alias */
+ /* XXX - doesn't handle nested aliases */
+ if (m->type == ALIAS && !conf->expand_aliases) {
+ if (strcmp(m->name, s->str) == 0) {
+ matched = true;
+ break;
+ }
+ }
+
+ /* Only need one host in the filter to match. */
+ /* XXX - can't use netgroup_tuple with NULL pw */
+ if (host_matches(parse_tree, NULL, lhost, shost, m) == ALLOW) {
+ matched = true;
+ break;
+ }
+ }
+
+ if (matched) {
+ ret = true;
+ } else if (conf->prune_matches) {
+ TAILQ_REMOVE(hostlist, m, entries);
+ free_member(m);
+ }
+ }
+
+ /* Free shosts array and its contents. */
+ n = 0;
+ STAILQ_FOREACH(s, &filters->hosts, entries) {
+ lhost = s->str;
+ shost = shosts[n++];
+ if (shost != lhost)
+ free(shost);
+ }
+ free(shosts);
+
+ debug_return_bool(ret);
+}
+
+static bool
+cmnd_matches_filter(struct sudoers_parse_tree *parse_tree,
+ struct member *m, struct cvtsudoers_config *conf)
+{
+ struct sudoers_context *ctx = parse_tree->ctx;
+ struct sudoers_string *s;
+ bool matched = false;
+ debug_decl(cmnd_matches_filter, SUDOERS_DEBUG_UTIL);
+
+ /* TODO: match on runasuserlist/runasgrouplist, notbefore/notafter etc */
+ STAILQ_FOREACH(s, &filters->cmnds, entries) {
+ /* An upper case filter entry may be a Cmnd_Alias */
+ /* XXX - doesn't handle nested aliases */
+ if (m->type == ALIAS && !conf->expand_aliases) {
+ if (strcmp(m->name, s->str) == 0) {
+ matched = true;
+ break;
+ }
+ }
+
+ /* Only need one command in the filter to match. */
+ ctx->user.cmnd = s->str;
+ ctx->user.cmnd_base = sudo_basename(ctx->user.cmnd);
+ if (cmnd_matches(parse_tree, m, NULL, NULL) == ALLOW) {
+ matched = true;
+ break;
+ }
+ }
+ ctx->user.cmnd_base = NULL;
+ ctx->user.cmnd = NULL;
+
+ debug_return_bool(matched);
+}
+
+static bool
+cmndlist_matches_filter(struct sudoers_parse_tree *parse_tree,
+ struct member_list *cmndlist, struct cvtsudoers_config *conf)
+{
+ struct member *m, *next;
+ bool ret = false;
+ debug_decl(cmndlist_matches_filter, SUDOERS_DEBUG_UTIL);
+
+ if (filters == NULL || STAILQ_EMPTY(&filters->cmnds))
+ debug_return_bool(true);
+
+ TAILQ_FOREACH_REVERSE_SAFE(m, cmndlist, member_list, entries, next) {
+ bool matched = cmnd_matches_filter(parse_tree, m, conf);
+ if (matched) {
+ ret = true;
+ } else if (conf->prune_matches) {
+ TAILQ_REMOVE(cmndlist, m, entries);
+ free_member(m);
+ }
+ }
+
+ debug_return_bool(ret);
+}
+
+static bool
+cmndspeclist_matches_filter(struct sudoers_parse_tree *parse_tree,
+ struct cmndspec_list *cmndspecs, struct cvtsudoers_config *conf)
+{
+ struct cmndspec *cs, *next;
+ bool ret = false;
+ debug_decl(cmndspeclist_matches_filter, SUDOERS_DEBUG_UTIL);
+
+ if (filters == NULL || STAILQ_EMPTY(&filters->cmnds))
+ debug_return_bool(true);
+
+ TAILQ_FOREACH_REVERSE_SAFE(cs, cmndspecs, cmndspec_list, entries, next) {
+ bool matched = cmnd_matches_filter(parse_tree, cs->cmnd, conf);
+ if (matched) {
+ ret = true;
+ } else if (conf->prune_matches) {
+ /* free_cmndspec() removes cs from the list itself. */
+ free_cmndspec(cs, cmndspecs);
+ }
+ }
+
+ debug_return_bool(ret);
+}
+
+/*
+ * Display Defaults entries
+ */
+static bool
+print_defaults_sudoers(struct sudoers_parse_tree *parse_tree,
+ struct sudo_lbuf *lbuf, bool expand_aliases)
+{
+ struct defaults *def, *next;
+ debug_decl(print_defaults_sudoers, SUDOERS_DEBUG_UTIL);
+
+ TAILQ_FOREACH_SAFE(def, &parse_tree->defaults, entries, next) {
+ sudoers_format_default_line(lbuf, parse_tree, def, &next,
+ expand_aliases);
+ }
+
+ debug_return_bool(!sudo_lbuf_error(lbuf));
+}
+
+static int
+print_alias_sudoers(struct sudoers_parse_tree *parse_tree, struct alias *a,
+ void *v)
+{
+ struct sudo_lbuf *lbuf = v;
+ struct member *m;
+ debug_decl(print_alias_sudoers, 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);
+}
+
+/*
+ * Display aliases
+ */
+static bool
+print_aliases_sudoers(struct sudoers_parse_tree *parse_tree,
+ struct sudo_lbuf *lbuf)
+{
+ debug_decl(print_aliases_sudoers, SUDOERS_DEBUG_UTIL);
+
+ alias_apply(parse_tree, print_alias_sudoers, lbuf);
+
+ debug_return_bool(!sudo_lbuf_error(lbuf));
+}
+
+static FILE *output_fp; /* global for convert_sudoers_output */
+
+static int
+convert_sudoers_output(const char * restrict buf)
+{
+ return fputs(buf, output_fp);
+}
+
+/*
+ * Apply filters to userspecs, removing non-matching entries.
+ */
+static void
+filter_userspecs(struct sudoers_parse_tree *parse_tree,
+ struct cvtsudoers_config *conf)
+{
+ struct userspec *us, *next_us;
+ struct privilege *priv, *next_priv;
+ debug_decl(filter_userspecs, SUDOERS_DEBUG_UTIL);
+
+ if (filters == NULL)
+ debug_return;
+
+ /*
+ * Does not currently prune out non-matching entries in the user or
+ * host lists. It acts more like a grep than a true filter.
+ * In the future, we may want to add a prune option.
+ */
+ TAILQ_FOREACH_SAFE(us, &parse_tree->userspecs, entries, next_us) {
+ if (!userlist_matches_filter(parse_tree, &us->users, conf)) {
+ TAILQ_REMOVE(&parse_tree->userspecs, us, entries);
+ free_userspec(us);
+ continue;
+ }
+ TAILQ_FOREACH_SAFE(priv, &us->privileges, entries, next_priv) {
+ if (!hostlist_matches_filter(parse_tree, &priv->hostlist, conf) ||
+ !cmndspeclist_matches_filter(parse_tree, &priv->cmndlist, conf)) {
+ TAILQ_REMOVE(&us->privileges, priv, entries);
+ free_privilege(priv);
+ }
+ }
+ if (TAILQ_EMPTY(&us->privileges)) {
+ TAILQ_REMOVE(&parse_tree->userspecs, us, entries);
+ free_userspec(us);
+ continue;
+ }
+ }
+ debug_return;
+}
+
+/*
+ * Check whether the alias described by "alias_name" is the same
+ * as "name" or includes an alias called "name".
+ * Returns true if matched, else false.
+ */
+static bool
+alias_matches(struct sudoers_parse_tree *parse_tree, const char *name,
+ const char *alias_name, short alias_type)
+{
+ struct alias *a;
+ struct member *m;
+ bool ret = false;
+ debug_decl(alias_matches, SUDOERS_DEBUG_ALIAS);
+
+ if (strcmp(name, alias_name) == 0)
+ debug_return_bool(true);
+
+ a = alias_get(parse_tree, alias_name, alias_type);
+ if (a != NULL) {
+ TAILQ_FOREACH(m, &a->members, entries) {
+ if (m->type != ALIAS)
+ continue;
+ if (alias_matches(parse_tree, name, m->name, alias_type)) {
+ ret = true;
+ break;
+ }
+ }
+ alias_put(a);
+ }
+
+ debug_return_bool(ret);
+}
+
+/*
+ * Check whether userspecs uses the aliases in the specified member lists.
+ * If used, they are removed (and freed) from the list.
+ * This does *not* check Defaults for used aliases, only userspecs.
+ */
+static void
+alias_used_by_userspecs(struct sudoers_parse_tree *parse_tree,
+ struct member_list *user_aliases, struct member_list *runas_aliases,
+ struct member_list *host_aliases, struct member_list *cmnd_aliases)
+{
+ struct privilege *priv, *priv_next;
+ struct userspec *us, *us_next;
+ struct cmndspec *cs, *cs_next;
+ struct member *m, *m_next;
+ struct member *am, *am_next;
+ debug_decl(alias_used_by_userspecs, SUDOERS_DEBUG_ALIAS);
+
+ /* Iterate over the policy, checking for aliases. */
+ TAILQ_FOREACH_SAFE(us, &parse_tree->userspecs, entries, us_next) {
+ TAILQ_FOREACH_SAFE(m, &us->users, entries, m_next) {
+ if (m->type == ALIAS) {
+ /* If alias is used, remove from user_aliases and free. */
+ TAILQ_FOREACH_SAFE(am, user_aliases, entries, am_next) {
+ if (alias_matches(parse_tree, am->name, m->name, USERALIAS)) {
+ TAILQ_REMOVE(user_aliases, am, entries);
+ free_member(am);
+ }
+ }
+ }
+ }
+ TAILQ_FOREACH_SAFE(priv, &us->privileges, entries, priv_next) {
+ TAILQ_FOREACH(m, &priv->hostlist, entries) {
+ if (m->type == ALIAS) {
+ /* If alias is used, remove from host_aliases and free. */
+ TAILQ_FOREACH_SAFE(am, host_aliases, entries, am_next) {
+ if (alias_matches(parse_tree, am->name, m->name, HOSTALIAS)) {
+ TAILQ_REMOVE(host_aliases, am, entries);
+ free_member(am);
+ }
+ }
+ }
+ }
+ TAILQ_FOREACH_SAFE(cs, &priv->cmndlist, entries, cs_next) {
+ if (cs->runasuserlist != NULL) {
+ TAILQ_FOREACH_SAFE(m, cs->runasuserlist, entries, m_next) {
+ if (m->type == ALIAS) {
+ /* If alias is used, remove from runas_aliases and free. */
+ TAILQ_FOREACH_SAFE(am, runas_aliases, entries, am_next) {
+ if (alias_matches(parse_tree, am->name, m->name, RUNASALIAS)) {
+ TAILQ_REMOVE(runas_aliases, am, entries);
+ free_member(am);
+ }
+ }
+ }
+ }
+ }
+ if (cs->runasgrouplist != NULL) {
+ TAILQ_FOREACH_SAFE(m, cs->runasgrouplist, entries, m_next) {
+ if (m->type == ALIAS) {
+ /* If alias is used, remove from runas_aliases and free. */
+ TAILQ_FOREACH_SAFE(am, runas_aliases, entries, am_next) {
+ if (alias_matches(parse_tree, am->name, m->name, RUNASALIAS)) {
+ TAILQ_REMOVE(runas_aliases, am, entries);
+ free_member(am);
+ }
+ }
+ }
+ }
+ }
+ if ((m = cs->cmnd)->type == ALIAS) {
+ /* If alias is used, remove from cmnd_aliases and free. */
+ TAILQ_FOREACH_SAFE(am, cmnd_aliases, entries, am_next) {
+ if (alias_matches(parse_tree, am->name, m->name, CMNDALIAS)) {
+ TAILQ_REMOVE(cmnd_aliases, am, entries);
+ free_member(am);
+ }
+ }
+ }
+ }
+ }
+ }
+
+ debug_return;
+}
+
+/*
+ * For each alias listed in members, remove and free the alias.
+ * Frees the contents of members too.
+ */
+static void
+free_aliases_by_members(struct sudoers_parse_tree *parse_tree,
+ struct member_list *members, short type)
+{
+ struct member *m;
+ struct alias *a;
+ debug_decl(free_aliases_by_members, SUDOERS_DEBUG_ALIAS);
+
+ while ((m = TAILQ_FIRST(members)) != NULL) {
+ TAILQ_REMOVE(members, m, entries);
+ a = alias_remove(parse_tree, m->name, type);
+ alias_free(a);
+ free_member(m);
+ }
+ debug_return;
+}
+
+/*
+ * Apply filters to host/user-based Defaults, removing non-matching entries.
+ */
+static void
+filter_defaults(struct sudoers_parse_tree *parse_tree,
+ struct cvtsudoers_config *conf)
+{
+ struct member_list user_aliases = TAILQ_HEAD_INITIALIZER(user_aliases);
+ struct member_list runas_aliases = TAILQ_HEAD_INITIALIZER(runas_aliases);
+ struct member_list host_aliases = TAILQ_HEAD_INITIALIZER(host_aliases);
+ struct member_list cmnd_aliases = TAILQ_HEAD_INITIALIZER(cmnd_aliases);
+ struct defaults *def, *def_next;
+ struct member *m, *m_next;
+ short alias_type;
+ debug_decl(filter_defaults, SUDOERS_DEBUG_DEFAULTS);
+
+ if (filters == NULL && conf->defaults == CVT_DEFAULTS_ALL)
+ debug_return;
+
+ TAILQ_FOREACH_SAFE(def, &parse_tree->defaults, entries, def_next) {
+ bool keep = true;
+
+ switch (def->type) {
+ case DEFAULTS:
+ if (!ISSET(conf->defaults, CVT_DEFAULTS_GLOBAL))
+ keep = false;
+ alias_type = UNSPEC;
+ break;
+ case DEFAULTS_USER:
+ if (!ISSET(conf->defaults, CVT_DEFAULTS_USER) ||
+ !userlist_matches_filter(parse_tree, &def->binding->members,
+ conf)) {
+ keep = false;
+ }
+ alias_type = USERALIAS;
+ break;
+ case DEFAULTS_RUNAS:
+ if (!ISSET(conf->defaults, CVT_DEFAULTS_RUNAS))
+ keep = false;
+ alias_type = RUNASALIAS;
+ break;
+ case DEFAULTS_HOST:
+ if (!ISSET(conf->defaults, CVT_DEFAULTS_HOST) ||
+ !hostlist_matches_filter(parse_tree, &def->binding->members,
+ conf)) {
+ keep = false;
+ }
+ alias_type = HOSTALIAS;
+ break;
+ case DEFAULTS_CMND:
+ if (!ISSET(conf->defaults, CVT_DEFAULTS_CMND) ||
+ !cmndlist_matches_filter(parse_tree, &def->binding->members,
+ conf)) {
+ keep = false;
+ }
+ alias_type = CMNDALIAS;
+ break;
+ default:
+ sudo_fatalx_nodebug("unexpected defaults type %d", def->type);
+ break;
+ }
+
+ if (!keep) {
+ /*
+ * Look for aliases used by the binding.
+ * Consecutive Defaults can share the same binding.
+ */
+ /* XXX - move to function */
+ if (alias_type != UNSPEC &&
+ (def_next == NULL || def->binding != def_next->binding)) {
+ TAILQ_FOREACH_SAFE(m, &def->binding->members, entries, m_next) {
+ if (m->type == ALIAS) {
+ TAILQ_REMOVE(&def->binding->members, m, entries);
+ switch (alias_type) {
+ case USERALIAS:
+ TAILQ_INSERT_TAIL(&user_aliases, m, entries);
+ break;
+ case RUNASALIAS:
+ TAILQ_INSERT_TAIL(&runas_aliases, m, entries);
+ break;
+ case HOSTALIAS:
+ TAILQ_INSERT_TAIL(&host_aliases, m, entries);
+ break;
+ case CMNDALIAS:
+ TAILQ_INSERT_TAIL(&cmnd_aliases, m, entries);
+ break;
+ default:
+ sudo_fatalx_nodebug("unexpected alias type %d",
+ alias_type);
+ break;
+ }
+ }
+ }
+ }
+ TAILQ_REMOVE(&parse_tree->defaults, def, entries);
+ free_default(def);
+ }
+ }
+
+ /* Determine unreferenced aliases and remove/free them. */
+ alias_used_by_userspecs(parse_tree, &user_aliases, &runas_aliases,
+ &host_aliases, &cmnd_aliases);
+ free_aliases_by_members(parse_tree, &user_aliases, USERALIAS);
+ free_aliases_by_members(parse_tree, &runas_aliases, RUNASALIAS);
+ free_aliases_by_members(parse_tree, &host_aliases, HOSTALIAS);
+ free_aliases_by_members(parse_tree, &cmnd_aliases, CMNDALIAS);
+
+ debug_return;
+}
+
+/*
+ * Remove unreferenced aliases.
+ */
+static void
+alias_remove_unused(struct sudoers_parse_tree *parse_tree)
+{
+ struct rbtree *used_aliases;
+ debug_decl(alias_remove_unused, SUDOERS_DEBUG_ALIAS);
+
+ used_aliases = alloc_aliases();
+ if (used_aliases == NULL)
+ sudo_fatalx(U_("%s: %s"), __func__, U_("unable to allocate memory"));
+
+ /* Move all referenced aliases to used_aliases. */
+ if (!alias_find_used(parse_tree, used_aliases))
+ sudo_fatalx(U_("%s: %s"), __func__, U_("unable to allocate memory"));
+
+ /* Only unreferenced aliases are left, swap and free the unused ones. */
+ free_aliases(parse_tree->aliases);
+ parse_tree->aliases = used_aliases;
+
+ debug_return;
+}
+
+/*
+ * Prune out non-matching entries from user and host aliases.
+ */
+static int
+alias_prune_helper(struct sudoers_parse_tree *parse_tree, struct alias *a,
+ void *v)
+{
+ struct cvtsudoers_config *conf = v;
+
+ /* XXX - misuse of these functions */
+ switch (a->type) {
+ case USERALIAS:
+ userlist_matches_filter(parse_tree, &a->members, conf);
+ break;
+ case HOSTALIAS:
+ hostlist_matches_filter(parse_tree, &a->members, conf);
+ break;
+ default:
+ break;
+ }
+
+ return 0;
+}
+
+/*
+ * Prune out non-matching entries from within aliases.
+ */
+static void
+alias_prune(struct sudoers_parse_tree *parse_tree,
+ struct cvtsudoers_config *conf)
+{
+ debug_decl(alias_prune, SUDOERS_DEBUG_ALIAS);
+
+ alias_apply(parse_tree, alias_prune_helper, conf);
+
+ debug_return;
+}
+
+/*
+ * Convert back to sudoers.
+ */
+static bool
+convert_sudoers_sudoers(struct sudoers_parse_tree *parse_tree,
+ const char *output_file, struct cvtsudoers_config *conf)
+{
+ bool ret = true;
+ struct sudo_lbuf lbuf;
+ debug_decl(convert_sudoers_sudoers, SUDOERS_DEBUG_UTIL);
+
+ if (strcmp(output_file, "-") == 0) {
+ output_fp = stdout;
+ } else {
+ if ((output_fp = fopen(output_file, "w")) == NULL)
+ sudo_fatal(U_("unable to open %s"), output_file);
+ }
+
+ /* Wrap lines at 80 columns with a 4 character indent. */
+ sudo_lbuf_init(&lbuf, convert_sudoers_output, 4, "\\", 80);
+
+ /* Print Defaults */
+ if (!ISSET(conf->suppress, SUPPRESS_DEFAULTS)) {
+ if (!print_defaults_sudoers(parse_tree, &lbuf, conf->expand_aliases))
+ goto done;
+ if (lbuf.len > 0) {
+ sudo_lbuf_print(&lbuf);
+ sudo_lbuf_append(&lbuf, "\n");
+ }
+ }
+
+ /* Print Aliases */
+ if (!conf->expand_aliases && !ISSET(conf->suppress, SUPPRESS_ALIASES)) {
+ if (!print_aliases_sudoers(parse_tree, &lbuf))
+ goto done;
+ if (lbuf.len > 1) {
+ sudo_lbuf_print(&lbuf);
+ sudo_lbuf_append(&lbuf, "\n");
+ }
+ }
+
+ /* Print User_Specs, separated by blank lines. */
+ if (!ISSET(conf->suppress, SUPPRESS_PRIVS)) {
+ if (!sudoers_format_userspecs(&lbuf, parse_tree, "\n",
+ conf->expand_aliases, 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"));
+ ret = false;
+ }
+ sudo_lbuf_destroy(&lbuf);
+
+ (void)fflush(output_fp);
+ if (ferror(output_fp)) {
+ sudo_warn(U_("unable to write to %s"), output_file);
+ ret = false;
+ }
+ if (output_fp != stdout)
+ fclose(output_fp);
+
+ debug_return_bool(ret);
+}
+
+static void
+display_usage(FILE *fp)
+{
+ (void) fprintf(fp, "usage: %s [-ehMpV] [-b dn] "
+ "[-c conf_file ] [-d deftypes] [-f output_format] [-i input_format] "
+ "[-I increment] [-m filter] [-o output_file] [-O start_point] "
+ "[-P padding] [-s sections] [input_file]\n", getprogname());
+}
+
+sudo_noreturn static void
+usage(void)
+{
+ display_usage(stderr);
+ exit(EXIT_FAILURE);
+}
+
+sudo_noreturn static void
+help(void)
+{
+ (void) printf(_("%s - convert between sudoers file formats\n\n"), getprogname());
+ display_usage(stdout);
+ (void) puts(_("\nOptions:\n"
+ " -b, --base=dn the base DN for sudo LDAP queries\n"
+ " -c, --config=conf_file the path to the configuration file\n"
+ " -d, --defaults=deftypes only convert Defaults of the specified types\n"
+ " -e, --expand-aliases expand aliases when converting\n"
+ " -f, --output-format=format set output format: JSON, LDIF or sudoers\n"
+ " -i, --input-format=format set input format: LDIF or sudoers\n"
+ " -I, --increment=num amount to increase each sudoOrder by\n"
+ " -h, --help display help message and exit\n"
+ " -m, --match=filter only convert entries that match the filter\n"
+ " -M, --match-local match filter uses passwd and group databases\n"
+ " -o, --output=output_file write converted sudoers to output_file\n"
+ " -O, --order-start=num starting point for first sudoOrder\n"
+ " -p, --prune-matches prune non-matching users, groups and hosts\n"
+ " -P, --padding=num base padding for sudoOrder increment\n"
+ " -s, --suppress=sections suppress output of certain sections\n"
+ " -V, --version display version information and exit"));
+ exit(EXIT_SUCCESS);
+}
generated by cgit v1.2.3 (git 2.39.1) at 2024-11-24 13:41:44 +0000