NetBSD/usr.bin/passwd/krb5_passwd.c

182 lines
5.1 KiB
C

/* $NetBSD: krb5_passwd.c,v 1.11 2003/07/24 14:17:47 itojun Exp $ */
/*
* Copyright (c) 2000 The NetBSD Foundation, Inc.
* All rights reserved.
*
* This code is derived from software contributed to
* The NetBSD Foundation by Johan Danielsson.
*
* 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. Neither the name of The NetBSD Foundation nor the names of its
* contributors may be used to endorse or promote products derived
* from this software without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS
* ``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 FOUNDATION OR CONTRIBUTORS
* 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.
*/
/* uses the `Kerberos Change Password Protocol' */
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <err.h>
#include <pwd.h>
#include <openssl/ui.h>
#include <krb5.h>
#include "extern.h"
static krb5_context context;
static krb5_principal defprinc;
static int usage = PW_USE;
int
krb5_init(const char *progname)
{
return krb5_init_context(&context);
}
int
krb5_arg (char ch, const char *optarg)
{
krb5_error_code ret;
switch(ch) {
case '5':
case 'k':
usage = PW_USE_FORCE;
return 1;
case 'u':
ret = krb5_parse_name(context, optarg, &defprinc);
if(ret) {
krb5_warn(context, ret, "%s", optarg);
return 0;
}
return 1;
}
return 0;
}
int
krb5_arg_end(void)
{
return usage;
}
void
krb5_end(void)
{
if (context == NULL)
return;
if(defprinc)
krb5_free_principal(context, defprinc);
krb5_free_context(context);
}
int
krb5_chpw(const char *username)
{
krb5_error_code ret;
krb5_context context;
krb5_principal principal;
krb5_get_init_creds_opt opt;
krb5_creds cred;
int result_code;
krb5_data result_code_string, result_string;
char pwbuf[BUFSIZ];
ret = krb5_init_context (&context);
if (ret) {
warnx("failed kerberos initialisation: %s",
krb5_get_err_text(context, ret));
return 1;
}
krb5_get_init_creds_opt_init (&opt);
krb5_get_init_creds_opt_set_tkt_life (&opt, 300);
krb5_get_init_creds_opt_set_forwardable (&opt, FALSE);
krb5_get_init_creds_opt_set_proxiable (&opt, FALSE);
if(username != NULL) {
ret = krb5_parse_name (context, username, &principal);
if (ret) {
warnx("failed to parse principal: %s",
krb5_get_err_text(context, ret));
return 1;
}
} else
principal = defprinc;
ret = krb5_get_init_creds_password (context,
&cred,
principal,
NULL,
krb5_prompter_posix,
NULL,
0,
"kadmin/changepw",
&opt);
switch (ret) {
case 0:
break;
case KRB5_LIBOS_PWDINTR :
/* XXX */
return 1;
case KRB5KRB_AP_ERR_BAD_INTEGRITY :
case KRB5KRB_AP_ERR_MODIFIED :
fprintf(stderr, "Password incorrect\n");
return 1;
break;
default:
warnx("failed to get credentials: %s",
krb5_get_err_text(context, ret));
return 1;
}
krb5_data_zero (&result_code_string);
krb5_data_zero (&result_string);
/* XXX use getpass? It has a broken interface. */
if(UI_UTIL_read_pw_string(pwbuf, sizeof(pwbuf), "New password: ", 1) != 0)
return 1;
ret = krb5_change_password (context, &cred, pwbuf,
&result_code,
&result_code_string,
&result_string);
if (ret)
krb5_err (context, 1, ret, "krb5_change_password");
printf ("%.*s\n", (int)result_string.length, (char *)result_string.data);
krb5_data_free (&result_code_string);
krb5_data_free (&result_string);
krb5_free_creds_contents (context, &cred);
krb5_free_context (context);
return result_code;
}