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/*
* Copyright (c) 1996, 1998-2005 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>
#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
__unused static const char rcsid[] = "$Sudo: getspwuid.c,v 1.65.2.2 2007/06/12 01:28:41 millert Exp $";
#endif /* lint */
/*
* Global variables (yuck)
*/
#if defined(HAVE_GETPRPWNAM) && defined(__alpha)
int crypt_type = INT_MAX;
#endif /* HAVE_GETPRPWNAM && __alpha */
/*
* 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;
setprpwent();
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);
}
endprpwent();
if (epw)
return(epw);
}
#endif /* HAVE_GETPRPWNAM */
#ifdef HAVE_GETSPNAM
{
struct spwd *spw;
setspent();
if ((spw = getspnam(pw->pw_name)) && spw->sp_pwdp)
epw = estrdup(spw->sp_pwdp);
endspent();
if (epw)
return(epw);
}
#endif /* HAVE_GETSPNAM */
#ifdef HAVE_GETSPWUID
{
struct s_passwd *spw;
setspwent();
if ((spw = getspwuid(pw->pw_uid)) && spw->pw_passwd)
epw = estrdup(spw->pw_passwd);
endspwent();
if (epw)
return(epw);
}
#endif /* HAVE_GETSPWUID */
#ifdef HAVE_GETPWANAM
{
struct passwd_adjunct *spw;
setpwaent();
if ((spw = getpwanam(pw->pw_name)) && spw->pwa_passwd)
epw = estrdup(spw->pwa_passwd);
endpwaent();
if (epw)
return(epw);
}
#endif /* HAVE_GETPWANAM */
#ifdef HAVE_GETAUTHUID
{
AUTHORIZATION *spw;
setauthent();
if ((spw = getauthuid(pw->pw_uid)) && spw->a_password)
epw = estrdup(spw->a_password);
endauthent();
if (epw)
return(epw);
}
#endif /* HAVE_GETAUTHUID */
/* Fall back on normal password. */
return(estrdup(pw->pw_passwd));
}
/*
* Dynamically allocate space for a struct password and the constituent parts
* that we care about. Fills in pw_passwd from shadow file if necessary.
*/
struct passwd *
sudo_pwdup(pw)
const struct passwd *pw;
{
char *cp;
const char *pw_passwd, *pw_shell;
size_t nsize, psize, csize, gsize, dsize, ssize, total;
struct passwd *newpw;
/* Get shadow password if available. */
pw_passwd = sudo_getepw(pw);
/* If shell field is empty, expand to _PATH_BSHELL. */
pw_shell = (pw->pw_shell == NULL || pw->pw_shell[0] == '\0')
? _PATH_BSHELL : pw->pw_shell;
/* Allocate in one big chunk for easy freeing. */
nsize = psize = csize = gsize = dsize = ssize = 0;
total = sizeof(struct passwd);
if (pw->pw_name) {
nsize = strlen(pw->pw_name) + 1;
total += nsize;
}
if (pw_passwd) {
psize = strlen(pw_passwd) + 1;
total += psize;
}
#ifdef HAVE_LOGIN_CAP_H
if (pw->pw_class) {
csize = strlen(pw->pw_class) + 1;
total += csize;
}
#endif
if (pw->pw_gecos) {
gsize = strlen(pw->pw_gecos) + 1;
total += gsize;
}
if (pw->pw_dir) {
dsize = strlen(pw->pw_dir) + 1;
total += dsize;
}
if (pw_shell) {
ssize = strlen(pw_shell) + 1;
total += ssize;
}
if ((cp = malloc(total)) == NULL)
return (NULL);
newpw = (struct passwd *)cp;
/*
* Copy in passwd contents and make strings relative to space
* at the end of the buffer.
*/
(void)memcpy(newpw, pw, sizeof(struct passwd));
cp += sizeof(struct passwd);
if (nsize) {
(void)memcpy(cp, pw->pw_name, nsize);
newpw->pw_name = cp;
cp += nsize;
}
if (psize) {
(void)memcpy(cp, pw_passwd, psize);
newpw->pw_passwd = cp;
cp += psize;
}
#ifdef HAVE_LOGIN_CAP_H
if (csize) {
(void)memcpy(cp, pw->pw_class, csize);
newpw->pw_class = cp;
cp += csize;
}
#endif
if (gsize) {
(void)memcpy(cp, pw->pw_gecos, gsize);
newpw->pw_gecos = cp;
cp += gsize;
}
if (dsize) {
(void)memcpy(cp, pw->pw_dir, dsize);
newpw->pw_dir = cp;
cp += dsize;
}
if (ssize) {
(void)memcpy(cp, pw_shell, ssize);
newpw->pw_shell = cp;
cp += ssize;
}
return (newpw);
}
/*
* 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 *pw;
if ((pw = getpwuid(uid)) == NULL)
return(NULL);
else
return(sudo_pwdup(pw));
}
/*
* 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 *pw;
if ((pw = getpwnam(name)) == NULL)
return(NULL);
else
return(sudo_pwdup(pw));
}
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