#include <netinet/in.h>
#include <arpa/inet.h>
#include <netdb.h>
-#include <dirent.h>
#include "sudo.h"
-#include "parse.h"
#include "interfaces.h"
+#include "parse.h"
+#include "gram.h"
#ifndef HAVE_FNMATCH
# include "emul/fnmatch.h"
#endif /* lint */
-/*
- * Prototypes
- */
-void dumpaliases __P((void));
-
/*
* Globals
*/
int Argc, NewArgc;
char **Argv, **NewArgv;
-int parse_error = FALSE;
int num_interfaces;
struct interface *interfaces;
struct sudo_user sudo_user;
-extern int clearaliases;
-extern int pedantic;
-
-/*
- * Returns TRUE if "s" has shell meta characters in it,
- * else returns FALSE.
- */
-int
-has_meta(s)
- char *s;
-{
- char *t;
-
- for (t = s; *t; t++) {
- if (*t == '\\' || *t == '?' || *t == '*' || *t == '[' || *t == ']')
- return(TRUE);
- }
- return(FALSE);
-}
-
-/*
- * Returns TRUE if user_cmnd matches, in the sudo sense,
- * the pathname in path; otherwise, return FALSE
- */
-int
-command_matches(path, sudoers_args)
- char *path;
- char *sudoers_args;
-{
- int clen, plen;
- char *args;
-
- if (user_cmnd == NULL)
- return(FALSE);
-
- if ((args = strchr(path, ' ')))
- *args++ = '\0';
-
- if (has_meta(path)) {
- if (fnmatch(path, user_cmnd, FNM_PATHNAME))
- return(FALSE);
- if (!sudoers_args)
- return(TRUE);
- else if (!user_args && sudoers_args && !strcmp("\"\"", sudoers_args))
- return(TRUE);
- else if (sudoers_args)
- return((fnmatch(sudoers_args, user_args ? user_args : "", 0) == 0));
- else
- return(FALSE);
- } else {
- plen = strlen(path);
- if (path[plen - 1] != '/') {
- if (strcmp(user_cmnd, path))
- return(FALSE);
- if (!sudoers_args)
- return(TRUE);
- else if (!user_args && sudoers_args && !strcmp("\"\"", sudoers_args))
- return(TRUE);
- else if (sudoers_args)
- return((fnmatch(sudoers_args, user_args ? user_args : "", 0) == 0));
- else
- return(FALSE);
- }
+extern int parse_error;
- clen = strlen(user_cmnd);
- if (clen < plen + 1)
- /* path cannot be the parent dir of user_cmnd */
- return(FALSE);
+/* For getopt(3) */
+extern char *optarg;
+extern int optind;
- if (strchr(user_cmnd + plen + 1, '/') != NULL)
- /* path could only be an anscestor of user_cmnd -- */
- /* ignoring, of course, things like // & /./ */
- return(FALSE);
+extern struct alias *aliases;
+extern struct defaults *defaults;
+extern struct userspec *userspecs;
- /* see whether path is the prefix of user_cmnd */
- return((strncmp(user_cmnd, path, plen) == 0));
- }
-}
+void dump_sudoers __P((void));
+void print_aliases __P((void));
+void print_defaults __P((void));
+void print_privilege __P((struct privilege *));
+void print_userspecs __P((void));
+void usage __P((void)) __attribute__((__noreturn__));
int
-addr_matches(n)
- char *n;
+main(argc, argv)
+ int argc;
+ char **argv;
{
- int i;
- char *m;
- struct in_addr addr, mask;
-
- /* If there's an explicit netmask, use it. */
- if ((m = strchr(n, '/'))) {
- *m++ = '\0';
- addr.s_addr = inet_addr(n);
- 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);
- }
- *(m - 1) = '/';
+ struct cmndspec *cs;
+ struct passwd pw, rpw;
+ struct privilege *priv;
+ struct userspec *us;
+ char *p, hbuf[MAXHOSTNAMELEN];
+ int ch, dflag, rval, matched;
+#ifdef YYDEBUG
+ extern int yydebug;
+ yydebug = 1;
+#endif
- for (i = 0; i < num_interfaces; i++)
- if ((interfaces[i].addr.s_addr & mask.s_addr) == addr.s_addr)
- return(TRUE);
- } else {
- addr.s_addr = inet_addr(n);
+ Argv = argv;
+ Argc = argc;
- for (i = 0; i < num_interfaces; i++)
- if (interfaces[i].addr.s_addr == addr.s_addr ||
- (interfaces[i].addr.s_addr & interfaces[i].netmask.s_addr)
- == addr.s_addr)
- return(TRUE);
+ memset(&pw, 0, sizeof(pw));
+ sudo_user.pw = &pw;
+ memset(&rpw, 0, sizeof(rpw));
+ runas_pw = &rpw;
+
+ dflag = 0;
+ while ((ch = getopt(argc, argv, "dh:u:")) != -1) {
+ switch (ch) {
+ case 'd':
+ dflag = 1;
+ break;
+ case 'h':
+ user_host = optarg;
+ break;
+ case 'u':
+ user_runas = &optarg;
+ break;
+ default:
+ usage();
+ break;
+ }
}
-
- return(FALSE);
-}
-
-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));
+ argc -= optind;
+ argv += optind;
+ NewArgc = argc;
+ NewArgv = argv;
+ if (argc < 2) {
+ if (!dflag)
+ usage();
+ user_name = "nobody";
+ user_cmnd = "true";
} else {
- if (strchr(pattern, '.'))
- return(strcasecmp(lhost, pattern));
- else
- return(strcasecmp(shost, pattern));
+ user_name = *argv++;
+ user_cmnd = *argv;
+ NewArgc -= 2;
}
-}
-int
-userpw_matches(sudoers_user, user, pw)
- char *sudoers_user;
- char *user;
- struct passwd *pw;
-{
- if (pw != NULL && *sudoers_user == '#') {
- uid_t uid = atoi(sudoers_user + 1);
- if (uid == pw->pw_uid)
- return(1);
+ if (user_host == NULL) {
+ if (gethostname(hbuf, sizeof(hbuf)) != 0)
+ err(1, "gethostname");
+ user_host = hbuf;
+ }
+ if ((p = strchr(user_host, '.'))) {
+ *p = '\0';
+ user_shost = estrdup(user_host);
+ *p = '.';
+ } else {
+ user_shost = user_host;
}
- return(strcmp(sudoers_user, user) == 0);
-}
-
-int
-usergr_matches(group, user, pw)
- char *group;
- char *user;
- struct passwd *pw;
-{
- struct group *grp;
- char **cur;
-
- /* Make sure we have a valid usergroup, sudo style. */
- if (*group++ != '%')
- return(FALSE);
-
- if ((grp = getgrnam(group)) == NULL)
- return(FALSE);
- /*
- * Check against user's real gid as well as group's user list
- */
- if (getgid() == grp->gr_gid)
- return(TRUE);
+ /* Fill in user_args from NewArgv. */
+ if (NewArgc > 1) {
+ char *to, **from;
+ size_t size, n;
- for (cur=grp->gr_mem; *cur; cur++) {
- if (strcmp(*cur, user) == 0)
- return(TRUE);
+ size = (size_t) (NewArgv[NewArgc-1] - NewArgv[1]) +
+ strlen(NewArgv[NewArgc-1]) + 1;
+ user_args = (char *) emalloc(size);
+ for (to = user_args, from = NewArgv + 1; *from; from++) {
+ n = strlcpy(to, *from, size - (to - user_args));
+ if (n >= size - (to - user_args))
+ errx(1, "internal error, init_vars() overflow");
+ to += n;
+ *to++ = ' ';
+ }
+ *--to = '\0';
}
- return(FALSE);
-}
-
-int
-netgr_matches(netgr, host, shost, user)
- char *netgr;
- char *host;
- char *shost;
- char *user;
-{
-#ifdef HAVE_GETDOMAINNAME
- static char *domain = (char *) -1;
-#else
- static char *domain = NULL;
-#endif /* HAVE_GETDOMAINNAME */
+ /* Initialize default values. */
+ init_defaults();
+ runas_pw->pw_name = *user_runas;
- /* Make sure we have a valid netgroup, sudo style. */
- if (*netgr++ != '+')
- return(FALSE);
+ /* Load ip addr/mask for each interface. */
+ load_interfaces();
-#ifdef HAVE_GETDOMAINNAME
- /* Get the domain name (if any). */
- if (domain == (char *) -1) {
- domain = (char *) emalloc(MAXHOSTNAMELEN);
+ /* Allocate space for data structures in the parser. */
+ init_parser("sudoers", 0);
+
+ if (yyparse() != 0 || parse_error)
+ (void) fputs("Does not parse", stdout);
+ else
+ (void) fputs("Parses OK", stdout);
+
+ if (!update_defaults())
+ (void) fputs(" (problem with defaults entries)", stdout);
+ puts(".");
+
+ if (dflag) {
+ (void) putchar('\n');
+ dump_sudoers();
+ if (argc < 2)
+ exit(0);
+ }
- if (getdomainname(domain, MAXHOSTNAMELEN) != 0 || *domain == '\0') {
- free(domain);
- domain = NULL;
+ /* This loop must match the one in sudoers_lookup() */
+ printf("\nEntries for user %s:\n", user_name);
+ matched = UNSPEC;
+ for (us = userspecs; us != NULL; us = us->next) {
+ if (user_matches(sudo_user.pw, us->user) == TRUE) {
+ priv = us->privileges;
+ putchar('\n');
+ print_privilege(priv);
+ putchar('\n');
+ if (host_matches(user_shost, user_host, priv->hostlist) == TRUE) {
+ puts("\thost matched");
+ for (cs = priv->cmndlist; cs != NULL; cs = cs->next) {
+ if (runas_matches(runas_pw, cs->runaslist) == TRUE) {
+ puts("\trunas matched");
+ rval = cmnd_matches(user_cmnd, user_args, cs->cmnd);
+ if (rval != UNSPEC)
+ matched = rval;
+ printf("\tcommand %s\n", rval == ALLOW ? "allowed" :
+ rval == DENY ? "denied" : "unmatched");
+ }
+ }
+ }
}
}
-#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 */
+ printf("\nCommand %s\n", matched == TRUE ? "allowed" :
+ matched == FALSE ? "denied" : "unmatched");
- return(FALSE);
+ exit(0);
}
void
return;
}
-int
-main(argc, argv)
- int argc;
- char **argv;
+void
+set_perms(perm)
+ int perm;
{
- struct passwd pw;
- char *p;
-#ifdef YYDEBUG
- extern int yydebug;
- yydebug = 1;
-#endif
-
- Argv = argv;
- Argc = argc;
+ return;
+}
- if (Argc >= 6 && strcmp(Argv[1], "-u") == 0) {
- user_runas = &Argv[2];
- pw.pw_name = Argv[3];
- user_host = Argv[4];
- user_cmnd = Argv[5];
-
- NewArgv = &Argv[5];
- NewArgc = Argc - 5;
- } else if (Argc >= 4) {
- pw.pw_name = Argv[1];
- user_host = Argv[2];
- user_cmnd = Argv[3];
-
- NewArgv = &Argv[3];
- NewArgc = Argc - 3;
- } else {
- (void) fprintf(stderr,
- "usage: sudo [-u user] <user> <host> <command> [args]\n");
- exit(1);
+void
+print_member(m)
+ struct member *m;
+{
+ struct sudo_command *c;
+
+ if (m->negated)
+ putchar('!');
+ if (m->name == NULL)
+ fputs("ALL", stdout);
+ else if (m->type != COMMAND)
+ fputs(m->name, stdout);
+ else {
+ c = (struct sudo_command *) m->name;
+ printf("%s%s%s", c->cmnd, c->args ? " " : "",
+ c->args ? c->args : "");
}
+}
- sudo_user.pw = &pw; /* user_name needs to be defined */
-
- if ((p = strchr(user_host, '.'))) {
- *p = '\0';
- user_shost = estrdup(user_host);
- *p = '.';
- } else {
- user_shost = user_host;
+void
+print_defaults()
+{
+ struct defaults *d;
+ struct member *m;
+
+ for (d = defaults; d != NULL; d = d->next) {
+ (void) fputs("Defaults", stdout);
+ switch (d->type) {
+ case DEFAULTS_HOST:
+ putchar('@');
+ break;
+ case DEFAULTS_USER:
+ putchar(':');
+ break;
+ case DEFAULTS_RUNAS:
+ putchar('>');
+ break;
+ }
+ for (m = d->binding; m != NULL; m = m->next) {
+ if (m->type == COMMAND)
+ printf("%s\"%s %s\"", m != d->binding ? "," : "",
+ ((struct sudo_command *)m->name)->cmnd,
+ ((struct sudo_command *)m->name)->args);
+ else
+ printf("%s%s", m != d->binding ? "," : "", m->name);
+ }
+ printf("\t%s%s", d->op == FALSE ? "!" : "", d->var);
+ if (d->val != NULL) {
+ printf("%c%s", d->op == TRUE ? '=' : d->op, d->val);
+ }
+ putchar('\n');
}
+}
- /* Fill in user_args from NewArgv. */
- if (NewArgc > 1) {
- char *to, **from;
- size_t size, n;
-
- size = (size_t) (NewArgv[NewArgc-1] - NewArgv[1]) +
- strlen(NewArgv[NewArgc-1]) + 1;
- user_args = (char *) emalloc(size);
- for (to = user_args, from = NewArgv + 1; *from; from++) {
- n = strlcpy(to, *from, size - (to - user_args));
- if (n >= size - (to - user_args))
- errx(1, "internal error, init_vars() overflow");
- to += n;
- *to++ = ' ';
+void
+print_aliases()
+{
+ struct alias *a;
+ struct member *m;
+ struct sudo_command *c;
+
+ for (a = aliases; a != NULL; a = a->next) {
+ switch (a->type) {
+ case HOSTALIAS:
+ (void) printf("Host_Alias\t%s = ", a->name);
+ break;
+ case CMNDALIAS:
+ (void) printf("Cmnd_Alias\t%s = ", a->name);
+ break;
+ case USERALIAS:
+ (void) printf("User_Alias\t%s = ", a->name);
+ break;
+ case RUNASALIAS:
+ (void) printf("Runas_Alias\t%s = ", a->name);
+ break;
}
- *--to = '\0';
+ for (m = a->first_member; m != NULL; m = m->next) {
+ if (m != a->first_member)
+ fputs(", ", stdout);
+ if (m->type == COMMAND) {
+ c = (struct sudo_command *) m->name;
+ printf("%s%s%s", c->cmnd, c->args ? " " : "",
+ c->args ? c->args : "");
+ } else
+ fputs(m->name, stdout);
+ }
+ putchar('\n');
}
+}
- /* Initialize default values. */
- init_defaults();
-
- /* Warn about aliases that are used before being defined. */
- pedantic = TRUE;
-
- /* Need to keep aliases around for dumpaliases(). */
- clearaliases = FALSE;
-
- /* Load ip addr/mask for each interface. */
- load_interfaces();
-
- /* Allocate space for data structures in the parser. */
- init_parser("sudoers");
+void
+print_privilege(priv)
+ struct privilege *priv;
+{
+ struct cmndspec *cs;
+ struct member *m;
+ struct privilege *p;
+ struct cmndtag tags;
+
+ for (p = priv; p != NULL; p = p->next) {
+ if (p != priv)
+ fputs(" : ", stdout);
+ for (m = p->hostlist; m != NULL; m = m->next) {
+ if (m != p->hostlist)
+ fputs(", ", stdout);
+ print_member(m);
+ }
+ fputs(" = ", stdout);
+ tags.nopasswd = tags.noexec = tags.monitor = UNSPEC;
+ for (cs = p->cmndlist; cs != NULL; cs = cs->next) {
+ if (cs != p->cmndlist)
+ fputs(", ", stdout);
+ if (cs->runaslist) {
+ fputs("(", stdout);
+ for (m = cs->runaslist; m != NULL; m = m->next) {
+ if (m != cs->runaslist)
+ fputs(", ", stdout);
+ print_member(m);
+ }
+ fputs(") ", stdout);
+ }
+ if (cs->tags.nopasswd != UNSPEC && cs->tags.nopasswd != tags.nopasswd)
+ printf("%sPASSWD: ", cs->tags.nopasswd ? "NO" : "");
+ if (cs->tags.noexec != UNSPEC && cs->tags.noexec != tags.noexec)
+ printf("%sEXEC: ", cs->tags.noexec ? "NO" : "");
+ if (cs->tags.monitor != UNSPEC && cs->tags.monitor != tags.monitor)
+ printf("%sMONITOR: ", cs->tags.monitor ? "" : "NO");
+ print_member(cs->cmnd);
+ memcpy(&tags, &cs->tags, sizeof(tags));
+ }
+ }
+}
- if (yyparse() || parse_error) {
- (void) printf("doesn't parse.\n");
- } else {
- (void) printf("parses OK.\n\n");
- if (top == 0)
- (void) printf("User %s not found\n", pw.pw_name);
- else while (top) {
- (void) printf("[%d]\n", top-1);
- (void) printf("user_match : %d\n", user_matches);
- (void) printf("host_match : %d\n", host_matches);
- (void) printf("cmnd_match : %d\n", cmnd_matches);
- (void) printf("no_passwd : %d\n", no_passwd);
- (void) printf("runas_match: %d\n", runas_matches);
- (void) printf("runas : %s\n", *user_runas);
- top--;
+void
+print_userspecs()
+{
+ struct member *m;
+ struct userspec *us;
+
+ for (us = userspecs; us != NULL; us = us->next) {
+ for (m = us->user; m != NULL; m = m->next) {
+ if (m != us->user)
+ fputs(", ", stdout);
+ print_member(m);
}
+ putchar('\t');
+ print_privilege(us->privileges);
+ putchar('\n');
}
+}
- /* Dump aliases. */
- (void) printf("Matching Aliases --\n");
- dumpaliases();
+void
+dump_sudoers()
+{
+ print_defaults();
- exit(0);
+ putchar('\n');
+ print_aliases();
+
+ putchar('\n');
+ print_userspecs();
+}
+
+void
+usage()
+{
+ (void) fprintf(stderr,
+ "usage: %s [-h host] [-u user] <user> <command> [args]\n",
+ getprogname());
+ exit(1);
}
projects / sudo / commitdiff