366 lines
8.3 KiB
C
366 lines
8.3 KiB
C
/*
|
|
* Copyright (c) 1996, 1998-2004 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
|
|
* 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.
|
|
*
|
|
* 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/stat.h>
|
|
#include <sys/param.h>
|
|
#include <stdio.h>
|
|
#ifdef STDC_HEADERS
|
|
# include <stdlib.h>
|
|
# include <stddef.h>
|
|
#else
|
|
# ifdef HAVE_STDLIB_H
|
|
# include <stdlib.h>
|
|
# endif
|
|
#endif /* STDC_HEADERS */
|
|
#ifdef HAVE_STRING_H
|
|
# if defined(HAVE_MEMORY_H) && !defined(STDC_HEADERS)
|
|
# include <memory.h>
|
|
# endif
|
|
# include <string.h>
|
|
#else
|
|
# ifdef HAVE_STRINGS_H
|
|
# include <strings.h>
|
|
# endif
|
|
#endif /* HAVE_STRING_H */
|
|
#ifdef HAVE_UNISTD_H
|
|
# include <unistd.h>
|
|
#endif /* HAVE_UNISTD_H */
|
|
#include <pwd.h>
|
|
#include <grp.h>
|
|
#ifdef HAVE_GETSPNAM
|
|
# include <shadow.h>
|
|
#endif /* HAVE_GETSPNAM */
|
|
#ifdef HAVE_GETPRPWNAM
|
|
# ifdef __hpux
|
|
# undef MAXINT
|
|
# include <hpsecurity.h>
|
|
# else
|
|
# include <sys/security.h>
|
|
# endif /* __hpux */
|
|
# include <prot.h>
|
|
#endif /* HAVE_GETPRPWNAM */
|
|
#ifdef HAVE_GETPWANAM
|
|
# include <sys/label.h>
|
|
# include <sys/audit.h>
|
|
# include <pwdadj.h>
|
|
#endif /* HAVE_GETPWANAM */
|
|
#ifdef HAVE_GETAUTHUID
|
|
# include <auth.h>
|
|
#endif /* HAVE_GETAUTHUID */
|
|
|
|
#include "sudo.h"
|
|
|
|
#ifndef lint
|
|
static const char rcsid[] = "$Sudo$";
|
|
#endif /* lint */
|
|
|
|
/*
|
|
* Global variables (yuck)
|
|
*/
|
|
#if defined(HAVE_GETPRPWNAM) && defined(__alpha)
|
|
int crypt_type = INT_MAX;
|
|
#endif /* HAVE_GETPRPWNAM && __alpha */
|
|
|
|
extern VOID *pwcache_get __P((enum cmptype, VOID *));
|
|
extern int pwcache_put __P((enum cmptype, VOID *));
|
|
extern struct passwd *sudo_pwdup __P((const struct passwd *));
|
|
extern struct group *sudo_grdup __P((const struct group *));
|
|
|
|
/*
|
|
* Return a copy of the encrypted password for the user described by pw.
|
|
* If shadow passwords are in use, look in the shadow file.
|
|
*/
|
|
char *
|
|
sudo_getepw(pw)
|
|
const struct passwd *pw;
|
|
{
|
|
char *epw;
|
|
|
|
/* If there is a function to check for shadow enabled, use it... */
|
|
#ifdef HAVE_ISCOMSEC
|
|
if (!iscomsec())
|
|
return(estrdup(pw->pw_passwd));
|
|
#endif /* HAVE_ISCOMSEC */
|
|
#ifdef HAVE_ISSECURE
|
|
if (!issecure())
|
|
return(estrdup(pw->pw_passwd));
|
|
#endif /* HAVE_ISSECURE */
|
|
|
|
epw = NULL;
|
|
#ifdef HAVE_GETPRPWNAM
|
|
{
|
|
struct pr_passwd *spw;
|
|
|
|
if ((spw = getprpwnam(pw->pw_name)) && spw->ufld.fd_encrypt) {
|
|
# ifdef __alpha
|
|
crypt_type = spw->ufld.fd_oldcrypt;
|
|
# endif /* __alpha */
|
|
epw = estrdup(spw->ufld.fd_encrypt);
|
|
}
|
|
if (epw)
|
|
return(epw);
|
|
}
|
|
#endif /* HAVE_GETPRPWNAM */
|
|
#ifdef HAVE_GETSPNAM
|
|
{
|
|
struct spwd *spw;
|
|
|
|
if ((spw = getspnam(pw->pw_name)) && spw->sp_pwdp)
|
|
epw = estrdup(spw->sp_pwdp);
|
|
if (epw)
|
|
return(epw);
|
|
}
|
|
#endif /* HAVE_GETSPNAM */
|
|
#ifdef HAVE_GETSPWUID
|
|
{
|
|
struct s_passwd *spw;
|
|
|
|
if ((spw = getspwuid(pw->pw_uid)) && spw->pw_passwd)
|
|
epw = estrdup(spw->pw_passwd);
|
|
if (epw)
|
|
return(epw);
|
|
}
|
|
#endif /* HAVE_GETSPWUID */
|
|
#ifdef HAVE_GETPWANAM
|
|
{
|
|
struct passwd_adjunct *spw;
|
|
|
|
if ((spw = getpwanam(pw->pw_name)) && spw->pwa_passwd)
|
|
epw = estrdup(spw->pwa_passwd);
|
|
if (epw)
|
|
return(epw);
|
|
}
|
|
#endif /* HAVE_GETPWANAM */
|
|
#ifdef HAVE_GETAUTHUID
|
|
{
|
|
AUTHORIZATION *spw;
|
|
|
|
if ((spw = getauthuid(pw->pw_uid)) && spw->a_password)
|
|
epw = estrdup(spw->a_password);
|
|
if (epw)
|
|
return(epw);
|
|
}
|
|
#endif /* HAVE_GETAUTHUID */
|
|
|
|
/* Fall back on normal password. */
|
|
return(estrdup(pw->pw_passwd));
|
|
}
|
|
|
|
/*
|
|
* Get a password entry by uid and allocate space for it.
|
|
* Fills in pw_passwd from shadow file if necessary.
|
|
*/
|
|
struct passwd *
|
|
sudo_getpwuid(uid)
|
|
uid_t uid;
|
|
{
|
|
struct passwd key, *pw;
|
|
|
|
key.pw_uid = uid;
|
|
if ((pw = pwcache_get(byuid, &key)) != NULL)
|
|
return(pw);
|
|
/*
|
|
* Cache passwd db entry if it exists or a negative response if not.
|
|
*/
|
|
if ((pw = getpwuid(uid)) != NULL) {
|
|
pw = sudo_pwdup(pw);
|
|
if (!pwcache_put(bypwnam, (VOID *) pw))
|
|
errorx(1, "unable to cache user name, already exists");
|
|
if (!pwcache_put(byuid, (VOID *) pw))
|
|
errorx(1, "unable to cache uid, already exists");
|
|
return(pw);
|
|
} else {
|
|
pw = emalloc(sizeof(*pw));
|
|
memset(pw, 0, sizeof(*pw));
|
|
pw->pw_uid = uid;
|
|
if (!pwcache_put(byuid, (VOID *) pw))
|
|
errorx(1, "unable to cache uid, already exists");
|
|
return(NULL);
|
|
}
|
|
}
|
|
|
|
/*
|
|
* Get a password entry by name and allocate space for it.
|
|
* Fills in pw_passwd from shadow file if necessary.
|
|
*/
|
|
struct passwd *
|
|
sudo_getpwnam(name)
|
|
const char *name;
|
|
{
|
|
struct passwd key, *pw;
|
|
size_t len;
|
|
char *cp;
|
|
|
|
key.pw_name = (char *) name;
|
|
if ((pw = pwcache_get(bypwnam, &key)) != NULL)
|
|
return(pw);
|
|
/*
|
|
* Cache passwd db entry if it exists or a negative response if not.
|
|
*/
|
|
if ((pw = getpwnam(name)) != NULL) {
|
|
pw = sudo_pwdup(pw);
|
|
if (!pwcache_put(bypwnam, (VOID *) pw))
|
|
errorx(1, "unable to cache user name, already exists");
|
|
if (!pwcache_put(byuid, (VOID *) pw))
|
|
errorx(1, "unable to cache uid, already exists");
|
|
return(pw);
|
|
} else {
|
|
len = strlen(name) + 1;
|
|
cp = emalloc(sizeof(*pw) + len);
|
|
memset(cp, 0, sizeof(*pw));
|
|
pw = (struct passwd *) cp;
|
|
cp += sizeof(*pw);
|
|
memcpy(cp, name, len);
|
|
pw->pw_name = cp;
|
|
pw->pw_uid = (uid_t) -1;
|
|
if (!pwcache_put(bypwnam, (VOID *) pw))
|
|
errorx(1, "unable to cache user name, already exists");
|
|
return(NULL);
|
|
}
|
|
}
|
|
|
|
void
|
|
sudo_setpwent()
|
|
{
|
|
setpwent();
|
|
#ifdef HAVE_GETPRPWNAM
|
|
setprpwent();
|
|
#endif
|
|
#ifdef HAVE_GETSPNAM
|
|
setspent();
|
|
#endif
|
|
#ifdef HAVE_GETSPWUID
|
|
setspwent();
|
|
#endif
|
|
#ifdef HAVE_GETPWANAM
|
|
setpwaent();
|
|
#endif
|
|
#ifdef HAVE_GETAUTHUID
|
|
setauthent();
|
|
#endif
|
|
}
|
|
|
|
void
|
|
sudo_endpwent()
|
|
{
|
|
endpwent();
|
|
#ifdef HAVE_GETPRPWNAM
|
|
endprpwent();
|
|
#endif
|
|
#ifdef HAVE_GETSPNAM
|
|
endspent();
|
|
#endif
|
|
#ifdef HAVE_GETSPWUID
|
|
endspwent();
|
|
#endif
|
|
#ifdef HAVE_GETPWANAM
|
|
endpwaent();
|
|
#endif
|
|
#ifdef HAVE_GETAUTHUID
|
|
endauthent();
|
|
#endif
|
|
}
|
|
|
|
void
|
|
sudo_setgrent()
|
|
{
|
|
setgrent();
|
|
}
|
|
|
|
void
|
|
sudo_endgrent()
|
|
{
|
|
endgrent();
|
|
}
|
|
|
|
/*
|
|
* Get a group entry by gid and allocate space for it.
|
|
*/
|
|
struct group *
|
|
sudo_getgrgid(gid)
|
|
gid_t gid;
|
|
{
|
|
struct group key, *gr;
|
|
|
|
key.gr_gid = gid;
|
|
if ((gr = pwcache_get(bygid, &key)) != NULL)
|
|
return(gr);
|
|
/*
|
|
* Cache group db entry if it exists or a negative response if not.
|
|
*/
|
|
if ((gr = getgrgid(gid)) != NULL) {
|
|
gr = sudo_grdup(gr);
|
|
if (!pwcache_put(bygrnam, (VOID *) gr))
|
|
errorx(1, "unable to cache group name, already exists");
|
|
if (!pwcache_put(bygid, (VOID *) gr))
|
|
errorx(1, "unable to cache gid, already exists");
|
|
return(gr);
|
|
} else {
|
|
gr = emalloc(sizeof(*gr));
|
|
memset(gr, 0, sizeof(*gr));
|
|
gr->gr_gid = gid;
|
|
if (!pwcache_put(bygid, (VOID *) gr))
|
|
errorx(1, "unable to cache gid, already exists");
|
|
return(NULL);
|
|
}
|
|
}
|
|
|
|
/*
|
|
* Get a group entry by name and allocate space for it.
|
|
*/
|
|
struct group *
|
|
sudo_getgrnam(name)
|
|
const char *name;
|
|
{
|
|
struct group key, *gr;
|
|
size_t len;
|
|
char *cp;
|
|
|
|
key.gr_name = (char *) name;
|
|
if ((gr = pwcache_get(bygrnam, &key)) != NULL)
|
|
return(gr);
|
|
/*
|
|
* Cache group db entry if it exists or a negative response if not.
|
|
*/
|
|
if ((gr = getgrnam(name)) != NULL) {
|
|
gr = sudo_grdup(gr);
|
|
if (!pwcache_put(bygrnam, (VOID *) gr))
|
|
errorx(1, "unable to cache group name, already exists");
|
|
if (!pwcache_put(bygid, (VOID *) gr))
|
|
errorx(1, "unable to cache gid, already exists");
|
|
return(gr);
|
|
} else {
|
|
len = strlen(name) + 1;
|
|
cp = emalloc(sizeof(*gr) + len);
|
|
memset(cp, 0, sizeof(*gr));
|
|
gr = (struct group *) cp;
|
|
cp += sizeof(*gr);
|
|
memcpy(cp, name, len);
|
|
gr->gr_name = cp;
|
|
gr->gr_gid = (gid_t) -1;
|
|
if (!pwcache_put(bygrnam, (VOID *) gr))
|
|
errorx(1, "unable to cache group name, already exists");
|
|
return(NULL);
|
|
}
|
|
}
|