/*
- * Copyright (c) 1996, 1998-2005, 2007
- * Todd C. Miller <Todd.Miller@courtesan.com>
+ * Copyright (c) 2004-2005, 2007-2010 Todd C. Miller <Todd.Miller@courtesan.com>
*
* Permission to use, copy, modify, and distribute this software for any
* purpose with or without fee is hereby granted, provided that the above
* OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
* OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF
* ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
- *
- * 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.
*/
#include <config.h>
#include <sys/types.h>
#include <sys/param.h>
-#include <sys/socket.h>
-#include <sys/stat.h>
#include <stdio.h>
#ifdef STDC_HEADERS
# include <stdlib.h>
#endif /* STDC_HEADERS */
#ifdef HAVE_STRING_H
# include <string.h>
-#else
-# ifdef HAVE_STRINGS_H
-# include <strings.h>
-# endif
#endif /* HAVE_STRING_H */
+#ifdef HAVE_STRINGS_H
+# include <strings.h>
+#endif /* HAVE_STRINGS_H */
#ifdef HAVE_UNISTD_H
# include <unistd.h>
#endif /* HAVE_UNISTD_H */
-#ifdef HAVE_FNMATCH
-# include <fnmatch.h>
-#endif /* HAVE_FNMATCH */
-#ifdef HAVE_EXTENDED_GLOB
-# include <glob.h>
-#endif /* HAVE_EXTENDED_GLOB */
-#ifdef HAVE_NETGROUP_H
-# include <netgroup.h>
-#endif /* HAVE_NETGROUP_H */
#include <ctype.h>
#include <pwd.h>
#include <grp.h>
-#include <netinet/in.h>
-#include <arpa/inet.h>
-#include <netdb.h>
-#ifdef HAVE_DIRENT_H
-# include <dirent.h>
-# define NAMLEN(dirent) strlen((dirent)->d_name)
-#else
-# define dirent direct
-# define NAMLEN(dirent) (dirent)->d_namlen
-# ifdef HAVE_SYS_NDIR_H
-# include <sys/ndir.h>
-# endif
-# ifdef HAVE_SYS_DIR_H
-# include <sys/dir.h>
-# endif
-# ifdef HAVE_NDIR_H
-# include <ndir.h>
-# endif
-#endif
#include "sudo.h"
#include "parse.h"
-#include "interfaces.h"
+#include "lbuf.h"
+#include <gram.h>
+
+/* Characters that must be quoted in sudoers */
+#define SUDOERS_QUOTED ":\\,=#\""
+
+/* sudoers nsswitch routines */
+struct sudo_nss sudo_nss_file = {
+ &sudo_nss_file,
+ NULL,
+ sudo_file_open,
+ sudo_file_close,
+ sudo_file_parse,
+ sudo_file_setdefs,
+ sudo_file_lookup,
+ sudo_file_display_cmnd,
+ sudo_file_display_defaults,
+ sudo_file_display_bound_defaults,
+ sudo_file_display_privs
+};
-#ifndef HAVE_FNMATCH
-# include "emul/fnmatch.h"
-#endif /* HAVE_FNMATCH */
-#ifndef HAVE_EXTENDED_GLOB
-# include "emul/glob.h"
-#endif /* HAVE_EXTENDED_GLOB */
+/*
+ * Parser externs.
+ */
+extern FILE *yyin;
+extern char *errorfile;
+extern int errorlineno, parse_error;
-#ifndef lint
-__unused static const char rcsid[] = "$Sudo: parse.c,v 1.160.2.15 2007/12/04 15:26:40 millert Exp $";
-#endif /* lint */
+/*
+ * Local prototypes.
+ */
+static void print_member __P((struct lbuf *, char *, int, int, int));
+static int display_bound_defaults __P((int, struct lbuf *));
+
+int
+sudo_file_open(nss)
+ struct sudo_nss *nss;
+{
+ if (def_ignore_local_sudoers)
+ return(-1);
+ nss->handle = open_sudoers(_PATH_SUDOERS, FALSE, NULL);
+ return(nss->handle ? 0 : -1);
+}
+
+int
+sudo_file_close(nss)
+ struct sudo_nss *nss;
+{
+ /* Free parser data structures and close sudoers file. */
+ init_parser(NULL, 0);
+ if (nss->handle != NULL) {
+ fclose(nss->handle);
+ nss->handle = NULL;
+ yyin = NULL;
+ }
+ return(0);
+}
/*
- * Globals
+ * Parse the specified sudoers file.
*/
-int parse_error = FALSE;
-extern int keepall;
-extern FILE *yyin, *yyout;
+int
+sudo_file_parse(nss)
+ struct sudo_nss *nss;
+{
+ if (nss->handle == NULL)
+ return(-1);
+
+ init_parser(_PATH_SUDOERS, 0);
+ yyin = nss->handle;
+ if (yyparse() != 0 || parse_error) {
+ log_error(NO_EXIT, "parse error in %s near line %d",
+ errorfile, errorlineno);
+ return(-1);
+ }
+ return(0);
+}
/*
- * Prototypes
+ * Wrapper around update_defaults() for nsswitch code.
*/
-static int has_meta __P((char *));
- void init_parser __P((void));
+int
+sudo_file_setdefs(nss)
+ struct sudo_nss *nss;
+{
+ if (nss->handle == NULL)
+ return(-1);
+
+ if (!update_defaults(SETDEF_GENERIC|SETDEF_HOST|SETDEF_USER))
+ return(-1);
+ return(0);
+}
/*
- * Look up the user in the sudoers file and check to see if they are
+ * Look up the user in the parsed sudoers file and check to see if they are
* allowed to run the specified command on this host as the target user.
*/
int
-sudoers_lookup(pwflag)
+sudo_file_lookup(nss, validated, pwflag)
+ struct sudo_nss *nss;
+ int validated;
int pwflag;
{
- int error, nopass;
-
- /* We opened _PATH_SUDOERS in check_sudoers() so just rewind it. */
- rewind(sudoers_fp);
- yyin = sudoers_fp;
- yyout = stdout;
-
- /* Allocate space for data structures in the parser. */
- init_parser();
-
- /* Keep more state for pseudo-commands so that listpw and verifypw work */
- if (pwflag > 0)
- keepall = TRUE;
+ int match, host_match, runas_match, cmnd_match;
+ struct cmndspec *cs;
+ struct cmndtag *tags = NULL;
+ struct privilege *priv;
+ struct userspec *us;
- /* Need to be runas user while stat'ing things in the parser. */
- set_perms(PERM_RUNAS);
- error = yyparse();
-
- /* Close the sudoers file now that we are done with it. */
- (void) fclose(sudoers_fp);
- sudoers_fp = NULL;
-
- if (error || parse_error) {
- set_perms(PERM_ROOT);
- return(VALIDATE_ERROR);
- }
-
- /*
- * Assume the worst. If the stack is empty the user was
- * not mentioned at all.
- */
- if (def_authenticate)
- error = VALIDATE_NOT_OK;
- else
- error = VALIDATE_NOT_OK | FLAG_NOPASS;
- if (pwflag) {
- SET(error, FLAG_NO_CHECK);
- } else {
- SET(error, FLAG_NO_HOST);
- if (!top)
- SET(error, FLAG_NO_USER);
- }
+ if (nss->handle == NULL)
+ return(validated);
/*
* Only check the actual command if pwflag is not set.
* It is set for the "validate", "list" and "kill" pseudo-commands.
* Always check the host and user.
*/
- nopass = -1;
if (pwflag) {
- int found;
+ int nopass;
enum def_tupple pwcheck;
pwcheck = (pwflag == -1) ? never : sudo_defs_table[pwflag].sd_un.tuple;
-
- if (pwcheck == always && def_authenticate)
- nopass = FLAG_CHECK_USER;
- else if (pwcheck == never || !def_authenticate)
- nopass = FLAG_NOPASS;
- found = 0;
- while (top) {
- if (host_matches == TRUE) {
- found = 1;
- if (pwcheck == any && no_passwd == TRUE)
- nopass = FLAG_NOPASS;
- else if (pwcheck == all && nopass != 0)
- nopass = (no_passwd == TRUE) ? FLAG_NOPASS : 0;
- }
- top--;
- }
- if (found) {
- set_perms(PERM_ROOT);
- if (nopass == -1)
- nopass = 0;
- return(VALIDATE_OK | nopass);
- }
- } else {
- while (top) {
- if (host_matches == TRUE) {
- CLR(error, FLAG_NO_HOST);
- if (runas_matches == TRUE && cmnd_matches == TRUE) {
- /*
- * User was granted access to cmnd on host as user.
- */
- set_perms(PERM_ROOT);
- return(VALIDATE_OK |
- (no_passwd == TRUE ? FLAG_NOPASS : 0) |
- (no_execve == TRUE ? FLAG_NOEXEC : 0) |
- (setenv_ok >= TRUE ? FLAG_SETENV : 0));
- } else if ((runas_matches == TRUE && cmnd_matches == FALSE) ||
- (runas_matches == FALSE && cmnd_matches == TRUE)) {
- /*
- * User was explicitly denied access to cmnd on host.
- */
- set_perms(PERM_ROOT);
- return(VALIDATE_NOT_OK |
- (no_passwd == TRUE ? FLAG_NOPASS : 0) |
- (no_execve == TRUE ? FLAG_NOEXEC : 0) |
- (setenv_ok >= TRUE ? FLAG_SETENV : 0));
+ nopass = (pwcheck == all) ? TRUE : FALSE;
+
+ if (list_pw == NULL)
+ SET(validated, FLAG_NO_CHECK);
+ CLR(validated, FLAG_NO_USER);
+ CLR(validated, FLAG_NO_HOST);
+ match = DENY;
+ tq_foreach_fwd(&userspecs, us) {
+ if (userlist_matches(sudo_user.pw, &us->users) != ALLOW)
+ continue;
+ tq_foreach_fwd(&us->privileges, priv) {
+ if (hostlist_matches(&priv->hostlist) != ALLOW)
+ continue;
+ tq_foreach_fwd(&priv->cmndlist, cs) {
+ /* Only check the command when listing another user. */
+ if (user_uid == 0 || list_pw == NULL ||
+ user_uid == list_pw->pw_uid ||
+ cmnd_matches(cs->cmnd) == ALLOW)
+ match = ALLOW;
+ if ((pwcheck == any && cs->tags.nopasswd == TRUE) ||
+ (pwcheck == all && cs->tags.nopasswd != TRUE))
+ nopass = cs->tags.nopasswd;
}
}
- top--;
}
+ if (match == ALLOW || user_uid == 0) {
+ /* User has an entry for this host. */
+ SET(validated, VALIDATE_OK);
+ } else if (match == DENY)
+ SET(validated, VALIDATE_NOT_OK);
+ if (pwcheck == always && def_authenticate)
+ SET(validated, FLAG_CHECK_USER);
+ else if (pwcheck == never || nopass == TRUE)
+ def_authenticate = FALSE;
+ return(validated);
}
- set_perms(PERM_ROOT);
-
- /*
- * The user was neither explicitly granted nor denied access.
- */
- if (nopass == -1)
- nopass = 0;
- return(error | nopass);
-}
-/*
- * If path doesn't end in /, return TRUE iff cmnd & path name the same inode;
- * otherwise, return TRUE if user_cmnd names one of the inodes in path.
- */
-int
-command_matches(sudoers_cmnd, sudoers_args)
- char *sudoers_cmnd;
- char *sudoers_args;
-{
- struct stat sudoers_stat;
- struct dirent *dent;
- char **ap, *base, buf[PATH_MAX];
- glob_t gl;
- DIR *dirp;
-
- /* Check for pseudo-commands */
- if (strchr(user_cmnd, '/') == NULL) {
- /*
- * Return true if both sudoers_cmnd and user_cmnd are "sudoedit" AND
- * a) there are no args in sudoers OR
- * b) there are no args on command line and none req by sudoers OR
- * c) there are args in sudoers and on command line and they match
- */
- if (strcmp(sudoers_cmnd, "sudoedit") != 0 ||
- strcmp(user_cmnd, "sudoedit") != 0)
- return(FALSE);
- if (!sudoers_args ||
- (!user_args && sudoers_args && !strcmp("\"\"", sudoers_args)) ||
- (sudoers_args &&
- fnmatch(sudoers_args, user_args ? user_args : "", 0) == 0)) {
- efree(safe_cmnd);
- safe_cmnd = estrdup(sudoers_cmnd);
- return(TRUE);
- } else
- return(FALSE);
- }
+ /* Need to be runas user while stat'ing things. */
+ set_perms(PERM_RUNAS);
- /*
- * If sudoers_cmnd has meta characters in it, use fnmatch(3)
- * to do the matching.
- */
- if (has_meta(sudoers_cmnd)) {
- /*
- * Return true if we find a match in the glob(3) results AND
- * a) there are no args in sudoers OR
- * b) there are no args on command line and none required by sudoers OR
- * c) there are args in sudoers and on command line and they match
- * else return false.
- *
- * Could optimize patterns ending in "/*" to "/user_base"
- */
-#define GLOB_FLAGS (GLOB_NOSORT | GLOB_MARK | GLOB_BRACE | GLOB_TILDE)
- if (glob(sudoers_cmnd, GLOB_FLAGS, NULL, &gl) != 0) {
- globfree(&gl);
- return(FALSE);
- }
- /* For each glob match, compare basename, st_dev and st_ino. */
- for (ap = gl.gl_pathv; *ap != NULL; ap++) {
- /* only stat if basenames are the same */
- if ((base = strrchr(*ap, '/')) != NULL)
- base++;
+ match = UNSPEC;
+ tq_foreach_rev(&userspecs, us) {
+ if (userlist_matches(sudo_user.pw, &us->users) != ALLOW)
+ continue;
+ CLR(validated, FLAG_NO_USER);
+ tq_foreach_rev(&us->privileges, priv) {
+ host_match = hostlist_matches(&priv->hostlist);
+ if (host_match == ALLOW)
+ CLR(validated, FLAG_NO_HOST);
else
- base = *ap;
- if (strcmp(user_base, base) != 0 ||
- stat(*ap, &sudoers_stat) == -1)
continue;
- if (user_stat->st_dev == sudoers_stat.st_dev &&
- user_stat->st_ino == sudoers_stat.st_ino) {
- efree(safe_cmnd);
- safe_cmnd = estrdup(*ap);
- break;
+ tq_foreach_rev(&priv->cmndlist, cs) {
+ runas_match = runaslist_matches(&cs->runasuserlist,
+ &cs->runasgrouplist);
+ if (runas_match == ALLOW) {
+ cmnd_match = cmnd_matches(cs->cmnd);
+ if (cmnd_match != UNSPEC) {
+ match = cmnd_match;
+ tags = &cs->tags;
+#ifdef HAVE_SELINUX
+ /* Set role and type if not specified on command line. */
+ if (user_role == NULL)
+ user_role = cs->role ? estrdup(cs->role) : def_role;
+ if (user_type == NULL)
+ user_type = cs->type ? estrdup(cs->type) : def_type;
+#endif /* HAVE_SELINUX */
+ goto matched2;
+ }
+ }
}
}
- globfree(&gl);
- if (*ap == NULL)
- return(FALSE);
-
- if (!sudoers_args ||
- (!user_args && sudoers_args && !strcmp("\"\"", sudoers_args)) ||
- (sudoers_args &&
- fnmatch(sudoers_args, user_args ? user_args : "", 0) == 0)) {
- efree(safe_cmnd);
- safe_cmnd = estrdup(user_cmnd);
- return(TRUE);
- } else
- return(FALSE);
- } else {
- size_t dlen = strlen(sudoers_cmnd);
-
- /*
- * No meta characters
- * Check to make sure this is not a directory spec (doesn't end in '/')
- */
- if (sudoers_cmnd[dlen - 1] != '/') {
- /* Only proceed if user_base and basename(sudoers_cmnd) match */
- if ((base = strrchr(sudoers_cmnd, '/')) == NULL)
- base = sudoers_cmnd;
- else
- base++;
- if (strcmp(user_base, base) != 0 ||
- stat(sudoers_cmnd, &sudoers_stat) == -1)
- return(FALSE);
-
- /*
- * Return true if inode/device matches AND
- * a) there are no args in sudoers OR
- * b) there are no args on command line and none req by sudoers OR
- * c) there are args in sudoers and on command line and they match
- */
- if (user_stat->st_dev != sudoers_stat.st_dev ||
- user_stat->st_ino != sudoers_stat.st_ino)
- return(FALSE);
- if (!sudoers_args ||
- (!user_args && sudoers_args && !strcmp("\"\"", sudoers_args)) ||
- (sudoers_args &&
- fnmatch(sudoers_args, user_args ? user_args : "", 0) == 0)) {
- efree(safe_cmnd);
- safe_cmnd = estrdup(sudoers_cmnd);
- return(TRUE);
- } else
- return(FALSE);
+ }
+ matched2:
+ if (match == ALLOW) {
+ SET(validated, VALIDATE_OK);
+ CLR(validated, VALIDATE_NOT_OK);
+ if (tags != NULL) {
+ if (tags->nopasswd != UNSPEC)
+ def_authenticate = !tags->nopasswd;
+ if (tags->noexec != UNSPEC)
+ def_noexec = tags->noexec;
+ if (tags->setenv != UNSPEC)
+ def_setenv = tags->setenv;
+ if (tags->log_input != UNSPEC)
+ def_log_input = tags->log_input;
+ if (tags->log_output != UNSPEC)
+ def_log_output = tags->log_output;
}
+ } else if (match == DENY) {
+ SET(validated, VALIDATE_NOT_OK);
+ CLR(validated, VALIDATE_OK);
+ }
+ set_perms(PERM_ROOT);
+ return(validated);
+}
- /*
- * Grot through sudoers_cmnd's directory entries, looking for user_base.
- */
- dirp = opendir(sudoers_cmnd);
- if (dirp == NULL)
- return(FALSE);
-
- if (strlcpy(buf, sudoers_cmnd, sizeof(buf)) >= sizeof(buf))
- return(FALSE);
- while ((dent = readdir(dirp)) != NULL) {
- /* ignore paths > PATH_MAX (XXX - log) */
- buf[dlen] = '\0';
- if (strlcat(buf, dent->d_name, sizeof(buf)) >= sizeof(buf))
- continue;
-
- /* only stat if basenames are the same */
- if (strcmp(user_base, dent->d_name) != 0 ||
- stat(buf, &sudoers_stat) == -1)
- continue;
- if (user_stat->st_dev == sudoers_stat.st_dev &&
- user_stat->st_ino == sudoers_stat.st_ino) {
- efree(safe_cmnd);
- safe_cmnd = estrdup(buf);
- break;
- }
- }
+#define TAG_CHANGED(t) \
+ (cs->tags.t != UNSPEC && cs->tags.t != IMPLIED && cs->tags.t != tags->t)
- closedir(dirp);
- return(dent != NULL);
+static void
+sudo_file_append_cmnd(cs, tags, lbuf)
+ struct cmndspec *cs;
+ struct cmndtag *tags;
+ struct lbuf *lbuf;
+{
+ struct member *m;
+
+#ifdef HAVE_SELINUX
+ if (cs->role)
+ lbuf_append(lbuf, "ROLE=", cs->role, " ", NULL);
+ if (cs->type)
+ lbuf_append(lbuf, "TYPE=", cs->type, " ", NULL);
+#endif /* HAVE_SELINUX */
+ if (TAG_CHANGED(setenv)) {
+ lbuf_append(lbuf, cs->tags.setenv ? "SETENV: " :
+ "NOSETENV: ", NULL);
+ tags->setenv = cs->tags.setenv;
+ }
+ if (TAG_CHANGED(noexec)) {
+ lbuf_append(lbuf, cs->tags.noexec ? "NOEXEC: " :
+ "EXEC: ", NULL);
+ tags->noexec = cs->tags.noexec;
}
+ if (TAG_CHANGED(nopasswd)) {
+ lbuf_append(lbuf, cs->tags.nopasswd ? "NOPASSWD: " :
+ "PASSWD: ", NULL);
+ tags->nopasswd = cs->tags.nopasswd;
+ }
+ if (TAG_CHANGED(log_input)) {
+ lbuf_append(lbuf, cs->tags.log_input ? "LOG_INPUT: " :
+ "NOLOG_INPUT: ", NULL);
+ tags->log_input = cs->tags.log_input;
+ }
+ if (TAG_CHANGED(log_output)) {
+ lbuf_append(lbuf, cs->tags.log_output ? "LOG_OUTPUT: " :
+ "NOLOG_OUTPUT: ", NULL);
+ tags->log_output = cs->tags.log_output;
+ }
+ m = cs->cmnd;
+ print_member(lbuf, m->name, m->type, m->negated,
+ CMNDALIAS);
}
static int
-addr_matches_if(n)
- char *n;
+sudo_file_display_priv_short(pw, us, lbuf)
+ struct passwd *pw;
+ struct userspec *us;
+ struct lbuf *lbuf;
{
- int i;
- struct in_addr addr;
- struct interface *ifp;
-#ifdef HAVE_IN6_ADDR
- struct in6_addr addr6;
- int j;
-#endif
- int family;
-
-#ifdef HAVE_IN6_ADDR
- if (inet_pton(AF_INET6, n, &addr6) > 0) {
- family = AF_INET6;
- } else
-#endif
- {
- family = AF_INET;
- addr.s_addr = inet_addr(n);
- }
-
- for (i = 0; i < num_interfaces; i++) {
- ifp = &interfaces[i];
- if (ifp->family != family)
+ struct cmndspec *cs;
+ struct member *m;
+ struct privilege *priv;
+ struct cmndtag tags;
+ int nfound = 0;
+
+ tq_foreach_fwd(&us->privileges, priv) {
+ if (hostlist_matches(&priv->hostlist) != ALLOW)
continue;
- switch(family) {
- case AF_INET:
- if (ifp->addr.ip4.s_addr == addr.s_addr ||
- (ifp->addr.ip4.s_addr & ifp->netmask.ip4.s_addr)
- == addr.s_addr)
- return(TRUE);
- break;
-#ifdef HAVE_IN6_ADDR
- case AF_INET6:
- if (memcmp(ifp->addr.ip6.s6_addr, addr6.s6_addr,
- sizeof(addr6.s6_addr)) == 0)
- return(TRUE);
- for (j = 0; j < sizeof(addr6.s6_addr); j++) {
- if ((ifp->addr.ip6.s6_addr[j] & ifp->netmask.ip6.s6_addr[j]) != addr6.s6_addr[j])
- break;
+ tags.noexec = UNSPEC;
+ tags.setenv = UNSPEC;
+ tags.nopasswd = UNSPEC;
+ tags.log_input = UNSPEC;
+ tags.log_output = UNSPEC;
+ lbuf_append(lbuf, " ", NULL);
+ tq_foreach_fwd(&priv->cmndlist, cs) {
+ if (cs != tq_first(&priv->cmndlist))
+ lbuf_append(lbuf, ", ", NULL);
+ lbuf_append(lbuf, "(", NULL);
+ if (!tq_empty(&cs->runasuserlist)) {
+ tq_foreach_fwd(&cs->runasuserlist, m) {
+ if (m != tq_first(&cs->runasuserlist))
+ lbuf_append(lbuf, ", ", NULL);
+ print_member(lbuf, m->name, m->type, m->negated,
+ RUNASALIAS);
+ }
+ } else if (tq_empty(&cs->runasgrouplist)) {
+ lbuf_append(lbuf, def_runas_default, NULL);
+ } else {
+ lbuf_append(lbuf, pw->pw_name, NULL);
+ }
+ if (!tq_empty(&cs->runasgrouplist)) {
+ lbuf_append(lbuf, " : ", NULL);
+ tq_foreach_fwd(&cs->runasgrouplist, m) {
+ if (m != tq_first(&cs->runasgrouplist))
+ lbuf_append(lbuf, ", ", NULL);
+ print_member(lbuf, m->name, m->type, m->negated,
+ RUNASALIAS);
}
- if (j == sizeof(addr6.s6_addr))
- return(TRUE);
-#endif /* HAVE_IN6_ADDR */
+ }
+ lbuf_append(lbuf, ") ", NULL);
+ sudo_file_append_cmnd(cs, &tags, lbuf);
+ nfound++;
}
+ lbuf_append(lbuf, "\n", NULL);
}
-
- return(FALSE);
+ return(nfound);
}
static int
-addr_matches_if_netmask(n, m)
- char *n;
- char *m;
+sudo_file_display_priv_long(pw, us, lbuf)
+ struct passwd *pw;
+ struct userspec *us;
+ struct lbuf *lbuf;
{
- int i;
- struct in_addr addr, mask;
- struct interface *ifp;
-#ifdef HAVE_IN6_ADDR
- struct in6_addr addr6, mask6;
- int j;
-#endif
- int family;
-
-#ifdef HAVE_IN6_ADDR
- if (inet_pton(AF_INET6, n, &addr6) > 0)
- family = AF_INET6;
- else
-#endif
- {
- family = AF_INET;
- addr.s_addr = inet_addr(n);
- }
-
- if (family == AF_INET) {
- if (strchr(m, '.'))
- mask.s_addr = inet_addr(m);
- else {
- i = 32 - atoi(m);
- mask.s_addr = 0xffffffff;
- mask.s_addr >>= i;
- mask.s_addr <<= i;
- mask.s_addr = htonl(mask.s_addr);
- }
- }
-#ifdef HAVE_IN6_ADDR
- else {
- if (inet_pton(AF_INET6, m, &mask6) <= 0) {
- j = atoi(m);
- for (i = 0; i < 16; i++) {
- if (j < i * 8)
- mask6.s6_addr[i] = 0;
- else if (i * 8 + 8 <= j)
- mask6.s6_addr[i] = 0xff;
- else
- mask6.s6_addr[i] = 0xff00 >> (j - i * 8);
- }
- }
- }
-#endif /* HAVE_IN6_ADDR */
-
- for (i = 0; i < num_interfaces; i++) {
- ifp = &interfaces[i];
- if (ifp->family != family)
+ struct cmndspec *cs;
+ struct member *m;
+ struct privilege *priv;
+ struct cmndtag tags;
+ int nfound = 0;
+
+ tq_foreach_fwd(&us->privileges, priv) {
+ if (hostlist_matches(&priv->hostlist) != ALLOW)
continue;
- switch(family) {
- case AF_INET:
- if ((ifp->addr.ip4.s_addr & mask.s_addr) == addr.s_addr)
- return(TRUE);
-#ifdef HAVE_IN6_ADDR
- case AF_INET6:
- for (j = 0; j < sizeof(addr6.s6_addr); j++) {
- if ((ifp->addr.ip6.s6_addr[j] & mask6.s6_addr[j]) != addr6.s6_addr[j])
- break;
+ tags.noexec = UNSPEC;
+ tags.setenv = UNSPEC;
+ tags.nopasswd = UNSPEC;
+ tags.log_input = UNSPEC;
+ tags.log_output = UNSPEC;
+ lbuf_append(lbuf, "\nSudoers entry:\n", NULL);
+ tq_foreach_fwd(&priv->cmndlist, cs) {
+ lbuf_append(lbuf, " RunAsUsers: ", NULL);
+ if (!tq_empty(&cs->runasuserlist)) {
+ tq_foreach_fwd(&cs->runasuserlist, m) {
+ if (m != tq_first(&cs->runasuserlist))
+ lbuf_append(lbuf, ", ", NULL);
+ print_member(lbuf, m->name, m->type, m->negated,
+ RUNASALIAS);
}
- if (j == sizeof(addr6.s6_addr))
- return(TRUE);
-#endif /* HAVE_IN6_ADDR */
+ } else if (tq_empty(&cs->runasgrouplist)) {
+ lbuf_append(lbuf, def_runas_default, NULL);
+ } else {
+ lbuf_append(lbuf, pw->pw_name, NULL);
+ }
+ lbuf_append(lbuf, "\n", NULL);
+ if (!tq_empty(&cs->runasgrouplist)) {
+ lbuf_append(lbuf, " RunAsGroups: ", NULL);
+ tq_foreach_fwd(&cs->runasgrouplist, m) {
+ if (m != tq_first(&cs->runasgrouplist))
+ lbuf_append(lbuf, ", ", NULL);
+ print_member(lbuf, m->name, m->type, m->negated,
+ RUNASALIAS);
+ }
+ lbuf_append(lbuf, "\n", NULL);
+ }
+ lbuf_append(lbuf, " Commands:\n\t", NULL);
+ sudo_file_append_cmnd(cs, &tags, lbuf);
+ lbuf_append(lbuf, "\n", NULL);
+ nfound++;
}
}
-
- return(FALSE);
+ return(nfound);
}
-/*
- * Returns TRUE if "n" is one of our ip addresses or if
- * "n" is a network that we are on, else returns FALSE.
- */
int
-addr_matches(n)
- char *n;
+sudo_file_display_privs(nss, pw, lbuf)
+ struct sudo_nss *nss;
+ struct passwd *pw;
+ struct lbuf *lbuf;
{
- char *m;
- int retval;
-
- /* If there's an explicit netmask, use it. */
- if ((m = strchr(n, '/'))) {
- *m++ = '\0';
- retval = addr_matches_if_netmask(n, m);
- *(m - 1) = '/';
- } else
- retval = addr_matches_if(n);
-
- return(retval);
-}
+ struct userspec *us;
+ int nfound = 0;
-/*
- * Returns 0 if the hostname matches the pattern and non-zero otherwise.
- */
-int
-hostname_matches(shost, lhost, pattern)
- char *shost;
- char *lhost;
- char *pattern;
-{
- if (has_meta(pattern)) {
- if (strchr(pattern, '.'))
- return(fnmatch(pattern, lhost, FNM_CASEFOLD));
- else
- return(fnmatch(pattern, shost, FNM_CASEFOLD));
- } else {
- if (strchr(pattern, '.'))
- return(strcasecmp(lhost, pattern));
+ if (nss->handle == NULL)
+ goto done;
+
+ tq_foreach_fwd(&userspecs, us) {
+ if (userlist_matches(pw, &us->users) != ALLOW)
+ continue;
+
+ if (long_list)
+ nfound += sudo_file_display_priv_long(pw, us, lbuf);
else
- return(strcasecmp(shost, pattern));
+ nfound += sudo_file_display_priv_short(pw, us, lbuf);
}
+done:
+ return(nfound);
}
/*
- * Returns TRUE if the user/uid from sudoers matches the specified user/uid,
- * else returns FALSE.
+ * Display matching Defaults entries for the given user on this host.
*/
int
-userpw_matches(sudoers_user, user, pw)
- char *sudoers_user;
- char *user;
+sudo_file_display_defaults(nss, pw, lbuf)
+ struct sudo_nss *nss;
struct passwd *pw;
+ struct lbuf *lbuf;
{
- if (pw != NULL && *sudoers_user == '#') {
- uid_t uid = atoi(sudoers_user + 1);
- if (uid == pw->pw_uid)
- return(1);
+ struct defaults *d;
+ char *prefix;
+ int nfound = 0;
+
+ if (nss->handle == NULL)
+ goto done;
+
+ if (lbuf->len == 0 || isspace((unsigned char)lbuf->buf[lbuf->len - 1]))
+ prefix = " ";
+ else
+ prefix = ", ";
+
+ tq_foreach_fwd(&defaults, d) {
+ switch (d->type) {
+ case DEFAULTS_HOST:
+ if (hostlist_matches(&d->binding) != ALLOW)
+ continue;
+ break;
+ case DEFAULTS_USER:
+ if (userlist_matches(pw, &d->binding) != ALLOW)
+ continue;
+ break;
+ case DEFAULTS_RUNAS:
+ case DEFAULTS_CMND:
+ continue;
+ }
+ lbuf_append(lbuf, prefix, NULL);
+ if (d->val != NULL) {
+ lbuf_append(lbuf, d->var, d->op == '+' ? "+=" :
+ d->op == '-' ? "-=" : "=", NULL);
+ if (strpbrk(d->val, " \t") != NULL) {
+ lbuf_append(lbuf, "\"", NULL);
+ lbuf_append_quoted(lbuf, "\"", d->val, NULL);
+ lbuf_append(lbuf, "\"", NULL);
+ } else
+ lbuf_append_quoted(lbuf, SUDOERS_QUOTED, d->val, NULL);
+ } else
+ lbuf_append(lbuf, d->op == FALSE ? "!" : "", d->var, NULL);
+ prefix = ", ";
+ nfound++;
}
- return(strcmp(sudoers_user, user) == 0);
+done:
+ return(nfound);
}
/*
- * Returns TRUE if the given user belongs to the named group,
- * else returns FALSE.
- * XXX - reduce the number of passwd/group lookups
+ * Display Defaults entries that are per-runas or per-command
*/
int
-usergr_matches(group, user, pw)
- char *group;
- char *user;
+sudo_file_display_bound_defaults(nss, pw, lbuf)
+ struct sudo_nss *nss;
struct passwd *pw;
+ struct lbuf *lbuf;
{
- struct group *grp;
- gid_t pw_gid;
- char **cur;
- int i;
-
- /* make sure we have a valid usergroup, sudo style */
- if (*group++ != '%')
- return(FALSE);
-
- /* look up user's primary gid in the passwd file */
- if (pw == NULL && (pw = getpwnam(user)) == NULL)
- return(FALSE);
- pw_gid = pw->pw_gid;
+ int nfound = 0;
- if ((grp = getgrnam(group)) == NULL)
- return(FALSE);
+ /* XXX - should only print ones that match what the user can do. */
+ nfound += display_bound_defaults(DEFAULTS_RUNAS, lbuf);
+ nfound += display_bound_defaults(DEFAULTS_CMND, lbuf);
- /* check against user's primary (passwd file) gid */
- if (grp->gr_gid == pw_gid)
- return(TRUE);
+ return(nfound);
+}
- /*
- * If the user has a supplementary group vector, check it first.
- */
- for (i = 0; i < user_ngroups; i++) {
- if (grp->gr_gid == user_groups[i])
- return(TRUE);
+/*
+ * Display Defaults entries of the given type.
+ */
+static int
+display_bound_defaults(dtype, lbuf)
+ int dtype;
+ struct lbuf *lbuf;
+{
+ struct defaults *d;
+ struct member *m, *binding = NULL;
+ char *dname, *dsep;
+ int atype, nfound = 0;
+
+ switch (dtype) {
+ case DEFAULTS_HOST:
+ atype = HOSTALIAS;
+ dname = "host";
+ dsep = "@";
+ break;
+ case DEFAULTS_USER:
+ atype = USERALIAS;
+ dname = "user";
+ dsep = ":";
+ break;
+ case DEFAULTS_RUNAS:
+ atype = RUNASALIAS;
+ dname = "runas";
+ dsep = ">";
+ break;
+ case DEFAULTS_CMND:
+ atype = CMNDALIAS;
+ dname = "cmnd";
+ dsep = "!";
+ break;
+ default:
+ return(-1);
}
- if (grp->gr_mem != NULL) {
- for (cur = grp->gr_mem; *cur; cur++) {
- if (strcmp(*cur, user) == 0)
- return(TRUE);
- }
+ /* printf("Per-%s Defaults entries:\n", dname); */
+ tq_foreach_fwd(&defaults, d) {
+ if (d->type != dtype)
+ continue;
+
+ nfound++;
+ if (binding != tq_first(&d->binding)) {
+ binding = tq_first(&d->binding);
+ if (nfound != 1)
+ lbuf_append(lbuf, "\n", NULL);
+ lbuf_append(lbuf, " Defaults", dsep, NULL);
+ for (m = binding; m != NULL; m = m->next) {
+ if (m != binding)
+ lbuf_append(lbuf, ",", NULL);
+ print_member(lbuf, m->name, m->type, m->negated, atype);
+ lbuf_append(lbuf, " ", NULL);
+ }
+ } else
+ lbuf_append(lbuf, ", ", NULL);
+ if (d->val != NULL) {
+ lbuf_append(lbuf, d->var, d->op == '+' ? "+=" :
+ d->op == '-' ? "-=" : "=", d->val, NULL);
+ } else
+ lbuf_append(lbuf, d->op == FALSE ? "!" : "", d->var, NULL);
}
- return(FALSE);
+ return(nfound);
}
-/*
- * Returns TRUE if "host" and "user" belong to the netgroup "netgr",
- * else return FALSE. Either of "host", "shost" or "user" may be NULL
- * in which case that argument is not checked...
- */
int
-netgr_matches(netgr, host, shost, user)
- char *netgr;
- char *host;
- char *shost;
- char *user;
+sudo_file_display_cmnd(nss, pw)
+ struct sudo_nss *nss;
+ struct passwd *pw;
{
- static char *domain;
-#ifdef HAVE_GETDOMAINNAME
- static int initialized;
-#endif
-
- /* make sure we have a valid netgroup, sudo style */
- if (*netgr++ != '+')
- return(FALSE);
-
-#ifdef HAVE_GETDOMAINNAME
- /* get the domain name (if any) */
- if (!initialized) {
- domain = (char *) emalloc(MAXHOSTNAMELEN);
- if (getdomainname(domain, MAXHOSTNAMELEN) == -1 || *domain == '\0') {
- efree(domain);
- domain = NULL;
+ struct cmndspec *cs;
+ struct member *match;
+ struct privilege *priv;
+ struct userspec *us;
+ int rval = 1;
+ int host_match, runas_match, cmnd_match;
+
+ if (nss->handle == NULL)
+ goto done;
+
+ match = NULL;
+ tq_foreach_rev(&userspecs, us) {
+ if (userlist_matches(pw, &us->users) != ALLOW)
+ continue;
+
+ tq_foreach_rev(&us->privileges, priv) {
+ host_match = hostlist_matches(&priv->hostlist);
+ if (host_match != ALLOW)
+ continue;
+ tq_foreach_rev(&priv->cmndlist, cs) {
+ runas_match = runaslist_matches(&cs->runasuserlist,
+ &cs->runasgrouplist);
+ if (runas_match == ALLOW) {
+ cmnd_match = cmnd_matches(cs->cmnd);
+ if (cmnd_match != UNSPEC) {
+ match = host_match && runas_match ?
+ cs->cmnd : NULL;
+ goto matched;
+ }
+ }
+ }
}
- initialized = 1;
}
-#endif /* HAVE_GETDOMAINNAME */
-
-#ifdef HAVE_INNETGR
- if (innetgr(netgr, host, user, domain))
- return(TRUE);
- else if (host != shost && innetgr(netgr, shost, user, domain))
- return(TRUE);
-#endif /* HAVE_INNETGR */
-
- return(FALSE);
+ matched:
+ if (match != NULL && !match->negated) {
+ printf("%s%s%s\n", safe_cmnd, user_args ? " " : "",
+ user_args ? user_args : "");
+ rval = 0;
+ }
+done:
+ return(rval);
}
/*
- * Returns TRUE if "s" has shell meta characters in it,
- * else returns FALSE.
+ * Print the contents of a struct member to stdout
*/
-static int
-has_meta(s)
- char *s;
+static void
+_print_member(lbuf, name, type, negated, alias_type)
+ struct lbuf *lbuf;
+ char *name;
+ int type, negated, alias_type;
{
- char *t;
-
- for (t = s; *t; t++) {
- if (*t == '\\' || *t == '?' || *t == '*' || *t == '[' || *t == ']')
- return(TRUE);
+ struct alias *a;
+ struct member *m;
+ struct sudo_command *c;
+
+ switch (type) {
+ case ALL:
+ lbuf_append(lbuf, negated ? "!ALL" : "ALL", NULL);
+ break;
+ case COMMAND:
+ c = (struct sudo_command *) name;
+ if (negated)
+ lbuf_append(lbuf, "!", NULL);
+ lbuf_append_quoted(lbuf, SUDOERS_QUOTED, c->cmnd, NULL);
+ if (c->args) {
+ lbuf_append(lbuf, " ", NULL);
+ lbuf_append_quoted(lbuf, SUDOERS_QUOTED, c->args, NULL);
+ }
+ break;
+ case ALIAS:
+ if ((a = alias_find(name, alias_type)) != NULL) {
+ tq_foreach_fwd(&a->members, m) {
+ if (m != tq_first(&a->members))
+ lbuf_append(lbuf, ", ", NULL);
+ _print_member(lbuf, m->name, m->type,
+ negated ? !m->negated : m->negated, alias_type);
+ }
+ break;
+ }
+ /* FALLTHROUGH */
+ default:
+ lbuf_append(lbuf, negated ? "!" : "", name, NULL);
+ break;
}
- return(FALSE);
+}
+
+static void
+print_member(lbuf, name, type, negated, alias_type)
+ struct lbuf *lbuf;
+ char *name;
+ int type, negated, alias_type;
+{
+ alias_seqno++;
+ _print_member(lbuf, name, type, negated, alias_type);
}
projects / debian / sudo / blobdiff