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/*
* Copyright (c) 1996, 1998-2005, 2010-2012, 2014-2015
* Todd C. Miller <Todd.Miller@sudo.ws>
*
* 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.
*/
/*
* This is an open source non-commercial project. Dear PVS-Studio, please check it.
* PVS-Studio Static Code Analyzer for C, C++ and C#: http://www.viva64.com
*/
/*
* 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).
*/
#include <config.h>
#ifdef HAVE_DCE
#include <sys/types.h>
#include <stdio.h>
#include <stdlib.h>
#ifdef HAVE_STRING_H
# include <string.h>
#endif /* HAVE_STRING_H */
#ifdef HAVE_STRINGS_H
# include <strings.h>
#endif /* HAVE_STRING_H */
#include <unistd.h>
#include <pwd.h>
#include <dce/rpc.h>
#include <dce/sec_login.h>
#include <dce/dce_error.h> /* required to call dce_error_inq_text routine */
#include "sudoers.h"
#include "sudo_auth.h"
static int check_dce_status(error_status_t, char *);
int
sudo_dce_verify(struct passwd *pw, char *plain_pw, sudo_auth *auth, struct sudo_conv_callback *callback)
{
struct passwd temp_pw;
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;
debug_decl(sudo_dce_verify, SUDOERS_DEBUG_AUTH)
/*
* 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) pw->pw_name,
sec_login_no_flags, &login_context, &status)) {
if (check_dce_status(status, "sec_login_setup_identity(1):"))
debug_return_int(AUTH_FAILURE);
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):"))
debug_return_int(AUTH_FAILURE);
/*
* 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)) {
sudo_printf(SUDO_CONV_ERROR_MSG,
"Whoa! Bogus authentication server!\n");
(void) check_dce_status(status,"sec_login_certify_identity(1):");
debug_return_int(AUTH_FAILURE);
}
if (check_dce_status(status, "sec_login_certify_identity(2):"))
debug_return_int(AUTH_FAILURE);
/*
* 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:"))
debug_return_int(AUTH_FAILURE);
/*
* 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) {
sudo_printf(SUDO_CONV_ERROR_MSG,
"You have no network credentials.\n");
debug_return_int(AUTH_FAILURE);
}
/* Check if the password has aged and is thus no good */
if (reset_passwd) {
sudo_printf(SUDO_CONV_ERROR_MSG,
"Your DCE password needs resetting.\n");
debug_return_int(AUTH_FAILURE);
}
/*
* 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) &temp_pw,
&status);
if (check_dce_status(status, "sec_login_get_pwent:"))
debug_return_int(AUTH_FAILURE);
/*
* 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);
debug_return_int(AUTH_SUCCESS);
} else {
if(check_dce_status(status, "sec_login_validate_identity(2):"))
debug_return_int(AUTH_FAILURE);
sec_login_purge_context(&login_context, &status);
if(check_dce_status(status, "sec_login_purge_context:"))
debug_return_int(AUTH_FAILURE);
}
}
(void) check_dce_status(status, "sec_login_setup_identity(2):");
debug_return_int(AUTH_FAILURE);
}
/* Returns 0 for DCE "ok" status, 1 otherwise */
static int
check_dce_status(error_status_t input_status, char *comment)
{
int error_stat;
unsigned char error_string[dce_c_error_string_len];
debug_decl(check_dce_status, SUDOERS_DEBUG_AUTH)
if (input_status == rpc_s_ok)
debug_return_int(0);
dce_error_inq_text(input_status, error_string, &error_stat);
sudo_printf(SUDO_CONV_ERROR_MSG, "%s %s\n", comment, error_string);
debug_return_int(1);
}
#endif /* HAVE_DCE */
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