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Refactor code to convert defaults to tags and do conversion on

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output for "sudo -l".

Remove the short_list (was long_list) global in favor of a verbose
argument.
This commit is contained in:
Todd C. Miller
2018-08-05 07:17:34 -06:00
parent 413b53cda3
commit 1e5af35564
9 changed files with 153 additions and 76 deletions
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110
plugins/sudoers/fmtsudoers.c
View File

@@ -125,11 +125,77 @@ sudoers_format_member(struct sudo_lbuf *lbuf,
m->negated, separator, alias_type);
}
/*
* Store a defaults entry as a command tag.
*/
bool
sudoers_defaults_to_tags(const char *var, const char *val, int op,
struct cmndtag *tags)
{
bool ret = true;
debug_decl(sudoers_defaults_to_tags, SUDOERS_DEBUG_UTIL)
if (op == true || op == false) {
if (strcmp(var, "authenticate") == 0) {
tags->nopasswd = op == false;
} else if (strcmp(var, "sudoedit_follow") == 0) {
tags->follow = op == true;
} else if (strcmp(var, "log_input") == 0) {
tags->log_input = op == true;
} else if (strcmp(var, "log_output") == 0) {
tags->log_output = op == true;
} else if (strcmp(var, "noexec") == 0) {
tags->noexec = op == true;
} else if (strcmp(var, "setenv") == 0) {
tags->setenv = op == true;
} else if (strcmp(var, "mail_all_cmnds") == 0 ||
strcmp(var, "mail_always") == 0 ||
strcmp(var, "mail_no_perms") == 0) {
tags->send_mail = op == true;
} else {
ret = false;
}
} else {
ret = false;
}
debug_return_bool(ret);
}
/*
* Convert a defaults list to command tags.
*/
bool
sudoers_defaults_list_to_tags(struct defaults_list *defs, struct cmndtag *tags)
{
bool ret = true;
struct defaults *d;
debug_decl(sudoers_defaults_list_to_tags, SUDOERS_DEBUG_UTIL)
TAGS_INIT(*tags);
if (defs != NULL) {
TAILQ_FOREACH(d, defs, entries) {
if (!sudoers_defaults_to_tags(d->var, d->val, d->op, tags)) {
if (d->val != NULL) {
sudo_debug_printf(SUDO_DEBUG_WARN,
"unable to convert defaults to tag: %s%s%s", d->var,
d->op == '+' ? "+=" : d->op == '-' ? "-=" : "=", d->val);
} else {
sudo_debug_printf(SUDO_DEBUG_WARN,
"unable to convert defaults to tag: %s%s%s",
d->op == false ? "!" : "", d->var, "");
}
ret = false;
}
}
}
debug_return_bool(ret);
}
#define FIELD_CHANGED(ocs, ncs, fld) \
((ocs) == NULL || (ncs)->fld != (ocs)->fld)
#define TAG_CHANGED(ocs, ncs, tt) \
(TAG_SET((ncs)->tags.tt) && FIELD_CHANGED(ocs, ncs, tags.tt))
#define TAG_CHANGED(ocs, ncs, t, tt) \
(TAG_SET((t).tt) && FIELD_CHANGED(ocs, ncs, tags.tt))
/*
* Write a cmndspec to lbuf in sudoers format.
@@ -137,10 +203,13 @@ sudoers_format_member(struct sudo_lbuf *lbuf,
bool
sudoers_format_cmndspec(struct sudo_lbuf *lbuf,
struct sudoers_parse_tree *parse_tree, struct cmndspec *cs,
struct cmndspec *prev_cs, bool expand_aliases)
struct cmndspec *prev_cs, struct cmndtag tags, bool expand_aliases)
{
debug_decl(sudoers_format_cmndspec, SUDOERS_DEBUG_UTIL)
/* Merge privilege-level tags with cmndspec tags. */
TAGS_MERGE(tags, cs->tags);
#ifdef HAVE_PRIV_SET
if (cs->privs != NULL && FIELD_CHANGED(prev_cs, cs, privs))
sudo_lbuf_append(lbuf, "PRIVS=\"%s\" ", cs->privs);
@@ -174,20 +243,20 @@ sudoers_format_cmndspec(struct sudo_lbuf *lbuf,
tm->tm_hour, tm->tm_min, tm->tm_sec);
sudo_lbuf_append(lbuf, "NOTAFTER=%s ", buf);
}
if (TAG_CHANGED(prev_cs, cs, setenv))
sudo_lbuf_append(lbuf, cs->tags.setenv ? "SETENV: " : "NOSETENV: ");
if (TAG_CHANGED(prev_cs, cs, noexec))
sudo_lbuf_append(lbuf, cs->tags.noexec ? "NOEXEC: " : "EXEC: ");
if (TAG_CHANGED(prev_cs, cs, nopasswd))
sudo_lbuf_append(lbuf, cs->tags.nopasswd ? "NOPASSWD: " : "PASSWD: ");
if (TAG_CHANGED(prev_cs, cs, log_input))
sudo_lbuf_append(lbuf, cs->tags.log_input ? "LOG_INPUT: " : "NOLOG_INPUT: ");
if (TAG_CHANGED(prev_cs, cs, log_output))
sudo_lbuf_append(lbuf, cs->tags.log_output ? "LOG_OUTPUT: " : "NOLOG_OUTPUT: ");
if (TAG_CHANGED(prev_cs, cs, send_mail))
sudo_lbuf_append(lbuf, cs->tags.send_mail ? "MAIL: " : "NOMAIL: ");
if (TAG_CHANGED(prev_cs, cs, follow))
sudo_lbuf_append(lbuf, cs->tags.follow ? "FOLLOW: " : "NOFOLLOW: ");
if (TAG_CHANGED(prev_cs, cs, tags, setenv))
sudo_lbuf_append(lbuf, tags.setenv ? "SETENV: " : "NOSETENV: ");
if (TAG_CHANGED(prev_cs, cs, tags, noexec))
sudo_lbuf_append(lbuf, tags.noexec ? "NOEXEC: " : "EXEC: ");
if (TAG_CHANGED(prev_cs, cs, tags, nopasswd))
sudo_lbuf_append(lbuf, tags.nopasswd ? "NOPASSWD: " : "PASSWD: ");
if (TAG_CHANGED(prev_cs, cs, tags, log_input))
sudo_lbuf_append(lbuf, tags.log_input ? "LOG_INPUT: " : "NOLOG_INPUT: ");
if (TAG_CHANGED(prev_cs, cs, tags, log_output))
sudo_lbuf_append(lbuf, tags.log_output ? "LOG_OUTPUT: " : "NOLOG_OUTPUT: ");
if (TAG_CHANGED(prev_cs, cs, tags, send_mail))
sudo_lbuf_append(lbuf, tags.send_mail ? "MAIL: " : "NOMAIL: ");
if (TAG_CHANGED(prev_cs, cs, tags, follow))
sudo_lbuf_append(lbuf, tags.follow ? "FOLLOW: " : "NOFOLLOW: ");
sudoers_format_member(lbuf, parse_tree, cs->cmnd, ", ",
expand_aliases ? CMNDALIAS : UNSPEC);
debug_return_bool(!sudo_lbuf_error(lbuf));
@@ -202,9 +271,13 @@ sudoers_format_privilege(struct sudo_lbuf *lbuf,
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))
@@ -244,7 +317,8 @@ sudoers_format_privilege(struct sudo_lbuf *lbuf,
} else if (cs != TAILQ_FIRST(&priv->cmndlist)) {
sudo_lbuf_append(lbuf, ", ");
}
sudoers_format_cmndspec(lbuf, parse_tree, cs, prev_cs, expand_aliases);
sudoers_format_cmndspec(lbuf, parse_tree, cs, prev_cs, tags,
expand_aliases);
prev_cs = cs;
}

3
plugins/sudoers/ldap.c
View File

@@ -1196,8 +1196,7 @@ ldap_to_sudoers(LDAP *ld, struct ldap_result *lres,
priv = sudo_ldap_role_to_priv(cn, hosts, runasusers, runasgroups,
cmnds, opts, notbefore ? notbefore[0]->bv_val : NULL,
notafter ? notafter[0]->bv_val : NULL, false, !short_list,
berval_iter);
notafter ? notafter[0]->bv_val : NULL, false, true, berval_iter);
cleanup:
if (cn != NULL)

41
plugins/sudoers/ldap_util.c
View File

@@ -439,37 +439,16 @@ sudo_ldap_role_to_priv(const char *cn, void *hosts, void *runasusers,
}
} else {
/* Convert to tags. */
bool handled = true;
if (op == true || op == false) {
if (strcmp(var, "authenticate") == 0) {
cmndspec->tags.nopasswd = op == false;
} else if (strcmp(var, "sudoedit_follow") == 0) {
cmndspec->tags.follow = op == true;
} else if (strcmp(var, "log_input") == 0) {
cmndspec->tags.log_input = op == true;
} else if (strcmp(var, "log_output") == 0) {
cmndspec->tags.log_output = op == true;
} else if (strcmp(var, "noexec") == 0) {
cmndspec->tags.noexec = op == true;
} else if (strcmp(var, "setenv") == 0) {
cmndspec->tags.setenv = op == true;
} else if (strcmp(var, "mail_all_cmnds") == 0 ||
strcmp(var, "mail_always") == 0 ||
strcmp(var, "mail_no_perms") == 0) {
cmndspec->tags.send_mail = op == true;
} else {
handled = false;
}
} else {
handled = false;
}
if (!handled && warnings) {
/* XXX - callback to process unsupported options. */
if (val != NULL) {
sudo_warnx(U_("unable to convert sudoOption: %s%s%s"), var, op == '+' ? "+=" : op == '-' ? "-=" : "=", val);
} else {
sudo_warnx(U_("unable to convert sudoOption: %s%s%s"), op == false ? "!" : "", var, "");
bool converted = sudoers_defaults_to_tags(var, val, op,
&cmndspec->tags);
if (!converted) {
if (warnings) {
/* XXX - callback to process unsupported options. */
if (val != NULL) {
sudo_warnx(U_("unable to convert sudoOption: %s%s%s"), var, op == '+' ? "+=" : op == '-' ? "-=" : "=", val);
} else {
sudo_warnx(U_("unable to convert sudoOption: %s%s%s"), op == false ? "!" : "", var, "");
}
}
continue;
}

31
plugins/sudoers/parse.c
View File

@@ -327,19 +327,23 @@ static int
display_priv_short(struct sudoers_parse_tree *parse_tree, struct passwd *pw,
struct userspec *us, struct sudo_lbuf *lbuf)
{
struct cmndspec *cs, *prev_cs;
struct member *m;
struct privilege *priv;
int nfound = 0;
debug_decl(display_priv_short, SUDOERS_DEBUG_PARSER)
TAILQ_FOREACH(priv, &us->privileges, entries) {
struct cmndspec *cs, *prev_cs = NULL;
struct cmndtag tags;
if (hostlist_matches(parse_tree, pw, &priv->hostlist) != ALLOW)
continue;
prev_cs = NULL;
sudoers_defaults_list_to_tags(&priv->defaults, &tags);
TAILQ_FOREACH(cs, &priv->cmndlist, entries) {
/* Start a new line if RunAs changes. */
if (prev_cs == NULL || RUNAS_CHANGED(cs, prev_cs)) {
struct member *m;
if (cs != TAILQ_FIRST(&priv->cmndlist))
sudo_lbuf_append(lbuf, "\n");
sudo_lbuf_append(lbuf, " (");
@@ -368,7 +372,7 @@ display_priv_short(struct sudoers_parse_tree *parse_tree, struct passwd *pw,
} else if (cs != TAILQ_FIRST(&priv->cmndlist)) {
sudo_lbuf_append(lbuf, ", ");
}
sudoers_format_cmndspec(lbuf, parse_tree, cs, prev_cs, true);
sudoers_format_cmndspec(lbuf, parse_tree, cs, prev_cs, tags, true);
prev_cs = cs;
nfound++;
}
@@ -416,12 +420,13 @@ static int
display_priv_long(struct sudoers_parse_tree *parse_tree, struct passwd *pw,
struct userspec *us, struct sudo_lbuf *lbuf)
{
struct cmndspec *cs, *prev_cs;
struct privilege *priv;
int nfound = 0, olen;
int nfound = 0;
debug_decl(display_priv_long, SUDOERS_DEBUG_PARSER)
TAILQ_FOREACH(priv, &us->privileges, entries) {
struct cmndspec *cs, *prev_cs;
if (hostlist_matches(parse_tree, pw, &priv->hostlist) != ALLOW)
continue;
prev_cs = NULL;
@@ -430,6 +435,8 @@ display_priv_long(struct sudoers_parse_tree *parse_tree, struct passwd *pw,
struct member *m;
if (new_long_entry(cs, prev_cs)) {
int olen;
if (priv->ldap_role != NULL) {
sudo_lbuf_append(lbuf, _("\nLDAP Role: %s\n"),
priv->ldap_role);
@@ -530,7 +537,7 @@ display_priv_long(struct sudoers_parse_tree *parse_tree, struct passwd *pw,
static int
sudo_display_userspecs(struct sudoers_parse_tree *parse_tree, struct passwd *pw,
struct sudo_lbuf *lbuf)
struct sudo_lbuf *lbuf, bool verbose)
{
struct userspec *us;
int nfound = 0;
@@ -540,10 +547,10 @@ sudo_display_userspecs(struct sudoers_parse_tree *parse_tree, struct passwd *pw,
if (userlist_matches(parse_tree, pw, &us->users) != ALLOW)
continue;
if (short_list)
nfound += display_priv_short(parse_tree, pw, us, lbuf);
else
if (verbose)
nfound += display_priv_long(parse_tree, pw, us, lbuf);
else
nfound += display_priv_short(parse_tree, pw, us, lbuf);
}
if (sudo_lbuf_error(lbuf))
debug_return_int(-1);
@@ -692,7 +699,7 @@ output(const char *buf)
* Returns true on success or -1 on error.
*/
int
display_privs(struct sudo_nss_list *snl, struct passwd *pw)
display_privs(struct sudo_nss_list *snl, struct passwd *pw, bool verbose)
{
struct sudo_nss *nss;
struct sudo_lbuf def_buf, priv_buf;
@@ -747,7 +754,7 @@ display_privs(struct sudo_nss_list *snl, struct passwd *pw)
count = 0;
TAILQ_FOREACH(nss, snl, entries) {
if (nss->query(nss, pw) != -1) {
n = sudo_display_userspecs(nss->parse_tree, pw, &priv_buf);
n = sudo_display_userspecs(nss->parse_tree, pw, &priv_buf, verbose);
if (n == -1)
goto bad;
count += n;

26
plugins/sudoers/parse.h
View File

@@ -43,6 +43,26 @@
(t).setenv = UNSPEC; \
} while (0)
/*
* Copy any tags set in t2 into t, overriding the value in t.
*/
#define TAGS_MERGE(t, t2) do { \
if ((t2).follow != UNSPEC) \
(t).follow = (t2).follow; \
if ((t2).log_input != UNSPEC) \
(t).log_input = (t2).log_input; \
if ((t2).log_output != UNSPEC) \
(t).log_output = (t2).log_output; \
if ((t2).noexec != UNSPEC) \
(t).noexec = (t2).noexec; \
if ((t2).nopasswd != UNSPEC) \
(t).nopasswd = (t2).nopasswd; \
if ((t2).send_mail != UNSPEC) \
(t).send_mail = (t2).send_mail; \
if ((t2).setenv != UNSPEC) \
(t).setenv = (t2).setenv; \
} while (0)
/*
* Returns true if any tag are not UNSPEC, else false.
*/
@@ -323,17 +343,19 @@ const char *digest_type_to_name(int digest_type);
/* parse.c */
struct sudo_nss_list;
int sudoers_lookup(struct sudo_nss_list *snl, struct passwd *pw, int validated, int pwflag);
int display_privs(struct sudo_nss_list *snl, struct passwd *pw);
int display_privs(struct sudo_nss_list *snl, struct passwd *pw, bool verbose);
int display_cmnd(struct sudo_nss_list *snl, struct passwd *pw);
/* fmtsudoers.c */
struct sudo_lbuf;
bool sudoers_format_cmndspec(struct sudo_lbuf *lbuf, struct sudoers_parse_tree *parse_tree, struct cmndspec *cs, struct cmndspec *prev_cs, bool expand_aliases);
bool sudoers_format_cmndspec(struct sudo_lbuf *lbuf, struct sudoers_parse_tree *parse_tree, struct cmndspec *cs, struct cmndspec *prev_cs, struct cmndtag tags, bool expand_aliases);
bool sudoers_format_default(struct sudo_lbuf *lbuf, struct defaults *d);
bool sudoers_format_default_line(struct sudo_lbuf *lbuf, struct sudoers_parse_tree *parse_tree, struct defaults *d, struct defaults **next, bool expand_aliases);
bool sudoers_format_member(struct sudo_lbuf *lbuf, struct sudoers_parse_tree *parse_tree, struct member *m, const char *separator, int alias_type);
bool sudoers_format_privilege(struct sudo_lbuf *lbuf, struct sudoers_parse_tree *parse_tree, struct privilege *priv, bool expand_aliases);
bool sudoers_format_userspec(struct sudo_lbuf *lbuf, struct sudoers_parse_tree *parse_tree, struct userspec *us, bool expand_aliases);
bool sudoers_format_userspecs(struct sudo_lbuf *lbuf, struct sudoers_parse_tree *parse_tree, const char *separator, bool expand_aliases, bool flush);
bool sudoers_defaults_to_tags(const char *var, const char *val, int op, struct cmndtag *tags);
bool sudoers_defaults_list_to_tags(struct defaults_list *defs, struct cmndtag *tags);
#endif /* SUDOERS_PARSE_H */

8
plugins/sudoers/policy.c
View File

@@ -858,7 +858,7 @@ sudoers_policy_check(int argc, char * const argv[], char *env_add[],
exec_args.envp = user_env_out;
exec_args.info = command_infop;
ret = sudoers_policy_main(argc, argv, 0, env_add, &exec_args);
ret = sudoers_policy_main(argc, argv, 0, env_add, false, &exec_args);
if (ret == true && sudo_version >= SUDO_API_MKVERSION(1, 3)) {
/* Unset close function if we don't need it to avoid extra process. */
if (!def_log_input && !def_log_output && !def_use_pty &&
@@ -876,7 +876,7 @@ sudoers_policy_validate(void)
user_cmnd = "validate";
SET(sudo_mode, MODE_VALIDATE);
debug_return_int(sudoers_policy_main(0, NULL, I_VERIFYPW, NULL, NULL));
debug_return_int(sudoers_policy_main(0, NULL, I_VERIFYPW, NULL, false, NULL));
}
static void
@@ -904,8 +904,6 @@ sudoers_policy_list(int argc, char * const argv[], int verbose,
SET(sudo_mode, MODE_CHECK);
else
SET(sudo_mode, MODE_LIST);
if (!verbose)
short_list = true;
if (list_user) {
list_pw = sudo_getpwnam(list_user);
if (list_pw == NULL) {
@@ -913,7 +911,7 @@ sudoers_policy_list(int argc, char * const argv[], int verbose,
debug_return_int(-1);
}
}
ret = sudoers_policy_main(argc, argv, I_LISTPW, NULL, NULL);
ret = sudoers_policy_main(argc, argv, I_LISTPW, NULL, verbose, NULL);
if (list_user) {
sudo_pw_delref(list_pw);
list_pw = NULL;

2
plugins/sudoers/sssd.c
View File

@@ -356,7 +356,7 @@ sss_to_sudoers(struct sudo_sss_handle *handle,
priv = sudo_ldap_role_to_priv(cn, hosts, runasusers, runasgroups,
cmnds, opts, notbefore ? notbefore[0] : NULL,
notafter ? notafter[0] : NULL, false, !short_list, val_array_iter);
notafter ? notafter[0] : NULL, false, true, val_array_iter);
cleanup:
if (cn_array != NULL)

5
plugins/sudoers/sudoers.c
View File

@@ -85,7 +85,6 @@ static bool tty_present(void);
*/
struct sudo_user sudo_user;
struct passwd *list_pw;
bool short_list;
uid_t timestamp_uid;
gid_t timestamp_gid;
#ifdef HAVE_BSD_AUTH_H
@@ -226,7 +225,7 @@ cleanup:
int
sudoers_policy_main(int argc, char * const argv[], int pwflag, char *env_add[],
void *closure)
bool verbose, void *closure)
{
char **edit_argv = NULL;
char *iolog_path = NULL;
@@ -485,7 +484,7 @@ sudoers_policy_main(int argc, char * const argv[], int pwflag, char *env_add[],
ret = display_cmnd(snl, list_pw ? list_pw : sudo_user.pw);
break;
case MODE_LIST:
ret = display_privs(snl, list_pw ? list_pw : sudo_user.pw);
ret = display_privs(snl, list_pw ? list_pw : sudo_user.pw, verbose);
break;
case MODE_VALIDATE:
/* Nothing to do. */

3
plugins/sudoers/sudoers.h
View File

@@ -373,11 +373,10 @@ bool matches_env_pattern(const char *pattern, const char *var, bool *full_match)
/* sudoers.c */
FILE *open_sudoers(const char *, bool, bool *);
int sudoers_policy_init(void *info, char * const envp[]);
int sudoers_policy_main(int argc, char * const argv[], int pwflag, char *env_add[], void *closure);
int sudoers_policy_main(int argc, char * const argv[], int pwflag, char *env_add[], bool verbose, void *closure);
void sudoers_cleanup(void);
extern struct sudo_user sudo_user;
extern struct passwd *list_pw;
extern bool short_list;
extern int sudo_mode;
extern uid_t timestamp_uid;
extern gid_t timestamp_gid;