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/*
* Copyright (c) 1996, 1998, 1999 Todd C. Miller <Todd.Miller@courtesan.com>
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
*
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
*
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
*
* 3. The name of the author may not be used to endorse or promote products
* derived from this software without specific prior written permission.
*
* 4. Products derived from this software may not be called "Sudo" nor
* may "Sudo" appear in their names without specific prior written
* permission from the author.
*
* THIS SOFTWARE IS PROVIDED ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES,
* INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY
* AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL
* THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
* EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
* PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS;
* OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY,
* WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR
* OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF
* ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
*/
#include "config.h"
#include <stdio.h>
#ifdef STDC_HEADERS
# include <stdlib.h>
#endif /* STDC_HEADERS */
#ifdef HAVE_STRING_H
# include <string.h>
#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 */
#include <sys/types.h>
#include <sys/stat.h>
#include <sys/param.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
static const char rcsid[] = "$Sudo: getspwuid.c,v 1.56 2000/02/18 17:56:26 millert Exp $";
#endif /* lint */
#ifndef STDC_HEADERS
extern char *getenv __P((const char *));
#endif /* !STDC_HEADERS */
/*
* Global variables (yuck)
*/
#if defined(HAVE_GETPRPWNAM) && defined(__alpha)
int crypt_type = INT_MAX;
#endif /* HAVE_GETPRPWNAM && __alpha */
/*
* Local functions not visible outside getspwuid.c
*/
static char *sudo_getshell __P((struct passwd *));
static struct passwd *sudo_pwdup __P((struct passwd *));
/*
* Return the user's shell based on either the SHELL
* environment variable or the passwd(5) entry (in that order).
*/
static char *
sudo_getshell(pw)
struct passwd *pw;
{
char *pw_shell;
if ((pw_shell = getenv("SHELL")) == NULL)
pw_shell = pw->pw_shell;
#ifdef _PATH_BSHELL
/* empty string "" means bourne shell */
if (*pw_shell == '\0')
pw_shell = _PATH_BSHELL;
#endif /* _PATH_BSHELL */
return(pw_shell);
}
/*
* Return the encrypted password for the user described by pw. If shadow
* passwords are in use, look in the shadow file.
*/
char *
sudo_getepw(pw)
struct passwd *pw;
{
/* If there is a function to check for shadow enabled, use it... */
#ifdef HAVE_ISCOMSEC
if (!iscomsec())
return(pw->pw_passwd);
#endif /* HAVE_ISCOMSEC */
#ifdef HAVE_ISSECURE
if (!issecure())
return(pw->pw_passwd);
#endif /* HAVE_ISSECURE */
#ifdef HAVE_GETPRPWNAM
{
struct pr_passwd *spw;
spw = getprpwnam(pw->pw_name);
if (spw != NULL && spw->ufld.fd_encrypt != NULL) {
# ifdef __alpha
crypt_type = spw->ufld.fd_oldcrypt;
# endif /* __alpha */
return(spw->ufld.fd_encrypt);
}
}
#endif /* HAVE_GETPRPWNAM */
#ifdef HAVE_GETSPNAM
{
struct spwd *spw;
if ((spw = getspnam(pw->pw_name)) && spw->sp_pwdp)
return(spw->sp_pwdp);
}
#endif /* HAVE_GETSPNAM */
#ifdef HAVE_GETSPWUID
{
struct s_passwd *spw;
if ((spw = getspwuid(pw->pw_uid)) && spw->pw_passwd)
return(spw->pw_passwd);
}
#endif /* HAVE_GETSPWUID */
#ifdef HAVE_GETPWANAM
{
struct passwd_adjunct *spw;
if ((spw = getpwanam(pw->pw_name)) && spw->pwa_passwd)
return(spw->pwa_passwd);
}
#endif /* HAVE_GETPWANAM */
#ifdef HAVE_GETAUTHUID
{
AUTHORIZATION *spw;
if ((spw = getauthuid(pw->pw_uid)) && spw->a_password)
return(spw->a_password);
}
#endif /* HAVE_GETAUTHUID */
/* Fall back on normal password. */
return(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.
*/
static struct passwd *
sudo_pwdup(pw)
struct passwd *pw;
{
struct passwd *local_pw;
/* Allocate space for a local copy of pw. */
local_pw = (struct passwd *) emalloc(sizeof(struct passwd));
/*
* Copy the struct passwd and the interesting strings...
*/
(void) memcpy(local_pw, pw, sizeof(struct passwd));
local_pw->pw_name = estrdup(pw->pw_name);
local_pw->pw_dir = estrdup(pw->pw_dir);
/* pw_shell is a special case since we overide with $SHELL */
local_pw->pw_shell = estrdup(sudo_getshell(pw));
/* pw_passwd gets a shadow password if applicable */
local_pw->pw_passwd = estrdup(sudo_getepw(pw));
return(local_pw);
}
/*
* 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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