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/*
* CU sudo version 1.5.5
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; either version 1, or (at your option)
* any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program; if not, write to the Free Software
* Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
*
* Please send bugs, changes, problems to sudo-bugs@courtesan.com
*
*******************************************************************
*
* Contributed by Jeff Earickson, Colby College, Waterville, ME
* (jaearick@colby.edu)
*
* The code below basically comes from the examples supplied on
* the OSF DCE 1.0.3 manpages for the sec_login routines, with
* enough additional polishing to make the routine work with the
* rest of sudo.
*
* This code is known to work on HP 700 and 800 series systems
* running HP-UX 9.X and 10.X, with either HP's version 1.2.1 of DCE.
* (aka, OSF DCE 1.0.3) or with HP's version 1.4 of DCE (aka, OSF
* DCE 1.1).
*
* Use at your own risk!!! (But I would like to hear about bugs.)
*
* $Id$
*/
#include "config.h"
#ifdef HAVE_DCE
#include <stdio.h>
#include <stdlib.h>
#include <pwd.h>
#include <sys/time.h>
#include <dce/rpc.h>
#include <dce/sec_login.h>
#include <dce/dce_error.h> /* required to call dce_error_inq_text routine */
#include "compat.h"
/*
* Prototypes
*/
static int check_dce_status __P((error_status_t, char *));
/*
* Globals
*/
static int error_stat;
static unsigned char error_string[dce_c_error_string_len];
/* returns 1 ("true") if user is a valid DCE principal, 0 otherwise */
int dce_pwent(username, plain_pw)
char *username;
char *plain_pw;
{
struct passwd *pwd;
sec_passwd_rec_t password_rec;
sec_login_handle_t login_context;
boolean32 reset_passwd;
sec_login_auth_src_t auth_src;
error_status_t status;
unsigned32 nbytes;
/* create the local context of the DCE principal necessary */
/* to perform authenticated network operations. The network */
/* identity set up by this operation cannot be used until it */
/* is validated via sec_login_validate_identity(). */
if(sec_login_setup_identity((unsigned_char_p_t) username,
sec_login_no_flags,&login_context,&status))
{
if(check_dce_status(status,"sec_login_setup_identity(1):"))
return(0);
password_rec.key.key_type = sec_passwd_plain;
password_rec.key.tagged_union.plain = (idl_char *) plain_pw;
password_rec.pepper = NULL;
password_rec.version_number = sec_passwd_c_version_none;
/* validate the login context with the password */
if(sec_login_validate_identity(login_context,&password_rec,
&reset_passwd,&auth_src,&status))
{
if(check_dce_status(status,"sec_login_validate_identity(1):"))
return(0);
/* Certify that the DCE Security Server used to set */
/* up and validate a login context is legitimate. Makes */
/* sure that we didn't get spoofed by another DCE server.*/
if(!sec_login_certify_identity(login_context,&status))
{
fprintf(stderr,"Whoa! Bogus authentication server!\n");
(void) check_dce_status(status,"sec_login_certify_identity(1):");
return(0);
}
if(check_dce_status(status,"sec_login_certify_identity(2):"))
return(0);
/* sets the network credentials to those specified */
/* by the now validated login context. */
sec_login_set_context(login_context,&status);
if(check_dce_status(status,"sec_login_set_context:"))
return(0);
/* oops, your credentials were no good. Possibly */
/* caused by clock times out of adjustment between */
/* DCE client and DCE security server... */
if(auth_src != sec_login_auth_src_network)
{
fprintf(stderr,"You have no network credentials\n");
return(0);
}
/* check if the password has aged and is no good */
if(reset_passwd)
{
fprintf(stderr,"Your DCE password needs resetting\n");
return(0);
}
/* malloc space for passwd structure */
nbytes = sizeof(struct passwd);
if((pwd = (struct passwd *) malloc(nbytes)) == NULL)
{
fprintf(stderr,"malloc for passwd struct failed\n");
return(0);
}
/* we should be a valid user by this point. Pull the */
/* user's password structure from the DCE security */
/* server just to make sure. If we get it with no */
/* problems, then we really are legitimate... */
sec_login_get_pwent(login_context,(sec_login_passwd_t) pwd,&status);
free(pwd);
if(check_dce_status(status,"sec_login_get_pwent:"))
return(0);
/************************************************************/
/* if we get to here, then the pwent above properly fetched */
/* the password structure from the DCE registry, so the user*/
/* must be valid. We don't really care what the user's */
/* registry password is, just that the user could be */
/* validated. In fact, if we tried to compare the local */
/* password to the DCE entry at this point, the operation */
/* would fail if the hidden password feature is turned on, */
/* because the password field would contain an asterisk. */
/* Also go ahead and destroy the user's DCE login context */
/* before we leave here (and don't bother checking the */
/* status), in order to clean up credentials files in */
/* /opt/dcelocal/var/security/creds. By doing this, we are */
/* assuming that the user will not need DCE authentication */
/* later in the program, only local authentication. If this*/
/* is not true, then the login_context will have to be */
/* returned to the calling program, and the context purged */
/* somewhere later in the program. */
/************************************************************/
sec_login_purge_context(&login_context,&status);
return(1);
}
else
{
if(check_dce_status(status,"sec_login_validate_identity(2):"))
return(0);
sec_login_purge_context(&login_context,&status);
if(check_dce_status(status,"sec_login_purge_context:"))
return(0);
}
}
if(check_dce_status(status,"sec_login_setup_identity(2):")) return(0);
return(0);
}
/* returns 0 for DCE "ok" status, 1 otherwise */
static int check_dce_status(input_status, comment)
error_status_t input_status;
char *comment;
{
if(input_status == rpc_s_ok) return(0);
dce_error_inq_text(input_status, error_string, &error_stat);
fprintf(stderr, "%s %s\n", comment, error_string);
return(1);
}
#endif /* HAVE_DCE */
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