diff options
Diffstat (limited to 'plugins/sudoers/fmtsudoers_cvt.c')
| -rw-r--r-- | plugins/sudoers/fmtsudoers_cvt.c | 219 |
1 files changed, 219 insertions, 0 deletions
diff --git a/plugins/sudoers/fmtsudoers_cvt.c b/plugins/sudoers/fmtsudoers_cvt.c new file mode 100644 index 0000000..ad750fa --- /dev/null +++ b/plugins/sudoers/fmtsudoers_cvt.c @@ -0,0 +1,219 @@ +/* + * SPDX-License-Identifier: ISC + * + * Copyright (c) 2004-2005, 2007-2020 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 + */ + +#include <config.h> + +#include <stdio.h> +#include <stdlib.h> +#include <string.h> +#include <time.h> + +#include "sudoers.h" +#include "sudo_lbuf.h" +#include <gram.h> + +/* + * Write a privilege to lbuf in sudoers format. + */ +bool +sudoers_format_privilege(struct sudo_lbuf *lbuf, + struct sudoers_parse_tree *parse_tree, struct privilege *priv, + bool expand_aliases) +{ + struct cmndspec *cs, *prev_cs; + struct cmndtag tags; + struct member *m; + debug_decl(sudoers_format_privilege, SUDOERS_DEBUG_UTIL); + + /* Convert per-privilege defaults to tags. */ + sudoers_defaults_list_to_tags(&priv->defaults, &tags); + + /* Print hosts list. */ + TAILQ_FOREACH(m, &priv->hostlist, entries) { + if (m != TAILQ_FIRST(&priv->hostlist)) + sudo_lbuf_append(lbuf, ", "); + sudoers_format_member(lbuf, parse_tree, m, ", ", + expand_aliases ? HOSTALIAS : UNSPEC); + } + + /* Print commands. */ + sudo_lbuf_append(lbuf, " = "); + prev_cs = NULL; + TAILQ_FOREACH(cs, &priv->cmndlist, entries) { + if (prev_cs == NULL || RUNAS_CHANGED(cs, prev_cs)) { + if (cs != TAILQ_FIRST(&priv->cmndlist)) + sudo_lbuf_append(lbuf, ", "); + if (cs->runasuserlist != NULL || cs->runasgrouplist != NULL) + sudo_lbuf_append(lbuf, "("); + if (cs->runasuserlist != NULL) { + TAILQ_FOREACH(m, cs->runasuserlist, entries) { + if (m != TAILQ_FIRST(cs->runasuserlist)) + sudo_lbuf_append(lbuf, ", "); + sudoers_format_member(lbuf, parse_tree, m, ", ", + expand_aliases ? RUNASALIAS : UNSPEC); + } + } + if (cs->runasgrouplist != NULL) { + sudo_lbuf_append(lbuf, " : "); + TAILQ_FOREACH(m, cs->runasgrouplist, entries) { + if (m != TAILQ_FIRST(cs->runasgrouplist)) + sudo_lbuf_append(lbuf, ", "); + sudoers_format_member(lbuf, parse_tree, m, ", ", + expand_aliases ? RUNASALIAS : UNSPEC); + } + } + if (cs->runasuserlist != NULL || cs->runasgrouplist != NULL) + sudo_lbuf_append(lbuf, ") "); + } else if (cs != TAILQ_FIRST(&priv->cmndlist)) { + sudo_lbuf_append(lbuf, ", "); + } + sudoers_format_cmndspec(lbuf, parse_tree, cs, prev_cs, tags, + expand_aliases); + prev_cs = cs; + } + + debug_return_bool(!sudo_lbuf_error(lbuf)); +} + +/* + * Write a userspec to lbuf in sudoers format. + */ +bool +sudoers_format_userspec(struct sudo_lbuf *lbuf, + struct sudoers_parse_tree *parse_tree, + struct userspec *us, bool expand_aliases) +{ + struct privilege *priv; + struct sudoers_comment *comment; + struct member *m; + debug_decl(sudoers_format_userspec, SUDOERS_DEBUG_UTIL); + + /* Print comments (if any). */ + STAILQ_FOREACH(comment, &us->comments, entries) { + sudo_lbuf_append(lbuf, "# %s\n", comment->str); + } + + /* Print users list. */ + TAILQ_FOREACH(m, &us->users, entries) { + if (m != TAILQ_FIRST(&us->users)) + sudo_lbuf_append(lbuf, ", "); + sudoers_format_member(lbuf, parse_tree, m, ", ", + expand_aliases ? USERALIAS : UNSPEC); + } + + TAILQ_FOREACH(priv, &us->privileges, entries) { + if (priv != TAILQ_FIRST(&us->privileges)) + sudo_lbuf_append(lbuf, " : "); + else + sudo_lbuf_append(lbuf, " "); + if (!sudoers_format_privilege(lbuf, parse_tree, priv, expand_aliases)) + break; + } + sudo_lbuf_append(lbuf, "\n"); + + debug_return_bool(!sudo_lbuf_error(lbuf)); +} + +/* + * Write a userspec_list to lbuf in sudoers format. + */ +bool +sudoers_format_userspecs(struct sudo_lbuf *lbuf, + struct sudoers_parse_tree *parse_tree, const char *separator, + bool expand_aliases, bool flush) +{ + struct userspec *us; + debug_decl(sudoers_format_userspecs, SUDOERS_DEBUG_UTIL); + + TAILQ_FOREACH(us, &parse_tree->userspecs, entries) { + if (separator != NULL && us != TAILQ_FIRST(&parse_tree->userspecs)) + sudo_lbuf_append(lbuf, "%s", separator); + if (!sudoers_format_userspec(lbuf, parse_tree, us, expand_aliases)) + break; + sudo_lbuf_print(lbuf); + } + + debug_return_bool(!sudo_lbuf_error(lbuf)); +} + +/* + * Format and append a defaults line to the specified lbuf. + * If next, is specified, it must point to the next defaults + * entry in the list; this is used to print multiple defaults + * entries with the same binding on a single line. + */ +bool +sudoers_format_default_line(struct sudo_lbuf *lbuf, + struct sudoers_parse_tree *parse_tree, struct defaults *d, + struct defaults **next, bool expand_aliases) +{ + struct member *m; + int alias_type; + debug_decl(sudoers_format_default_line, SUDOERS_DEBUG_UTIL); + + /* Print Defaults type and binding (if present) */ + switch (d->type) { + case DEFAULTS_HOST: + sudo_lbuf_append(lbuf, "Defaults@"); + alias_type = expand_aliases ? HOSTALIAS : UNSPEC; + break; + case DEFAULTS_USER: + sudo_lbuf_append(lbuf, "Defaults:"); + alias_type = expand_aliases ? USERALIAS : UNSPEC; + break; + case DEFAULTS_RUNAS: + sudo_lbuf_append(lbuf, "Defaults>"); + alias_type = expand_aliases ? RUNASALIAS : UNSPEC; + break; + case DEFAULTS_CMND: + sudo_lbuf_append(lbuf, "Defaults!"); + alias_type = expand_aliases ? CMNDALIAS : UNSPEC; + break; + default: + sudo_lbuf_append(lbuf, "Defaults"); + alias_type = UNSPEC; + break; + } + TAILQ_FOREACH(m, &d->binding->members, entries) { + if (m != TAILQ_FIRST(&d->binding->members)) + sudo_lbuf_append(lbuf, ", "); + sudoers_format_member(lbuf, parse_tree, m, ", ", alias_type); + } + + sudo_lbuf_append(lbuf, " "); + sudoers_format_default(lbuf, d); + + if (next != NULL) { + /* Merge Defaults with the same binding, there may be multiple. */ + struct defaults *n; + while ((n = TAILQ_NEXT(d, entries)) && d->binding == n->binding) { + sudo_lbuf_append(lbuf, ", "); + sudoers_format_default(lbuf, n); + d = n; + } + *next = n; + } + sudo_lbuf_append(lbuf, "\n"); + + debug_return_bool(!sudo_lbuf_error(lbuf)); +} |