571 lines
14 KiB
C
571 lines
14 KiB
C
/*
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* Copyright (c) 1997 - 2002 Kungliga Tekniska Högskolan
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* (Royal Institute of Technology, Stockholm, Sweden).
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* All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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*
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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*
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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*
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* 3. Neither the name of the Institute nor the names of its contributors
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* may be used to endorse or promote products derived from this software
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* without specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE INSTITUTE AND CONTRIBUTORS ``AS IS'' AND
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* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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* ARE DISCLAIMED. IN NO EVENT SHALL THE INSTITUTE OR CONTRIBUTORS BE LIABLE
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* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
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* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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* SUCH DAMAGE.
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*/
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#include "krb5_locl.h"
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RCSID("$Id: init_creds_pw.c,v 1.53 2002/04/18 09:14:51 joda Exp $");
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static int
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get_config_time (krb5_context context,
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const char *realm,
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const char *name,
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int def)
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{
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int ret;
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ret = krb5_config_get_time (context, NULL,
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"realms",
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realm,
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name,
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NULL);
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if (ret >= 0)
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return ret;
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ret = krb5_config_get_time (context, NULL,
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"libdefaults",
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name,
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NULL);
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if (ret >= 0)
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return ret;
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return def;
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}
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static krb5_error_code
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init_cred (krb5_context context,
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krb5_creds *cred,
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krb5_principal client,
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krb5_deltat start_time,
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const char *in_tkt_service,
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krb5_get_init_creds_opt *options)
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{
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krb5_error_code ret;
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krb5_realm *client_realm;
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int tmp;
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krb5_timestamp now;
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krb5_timeofday (context, &now);
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memset (cred, 0, sizeof(*cred));
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if (client)
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krb5_copy_principal(context, client, &cred->client);
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else {
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ret = krb5_get_default_principal (context,
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&cred->client);
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if (ret)
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goto out;
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}
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client_realm = krb5_princ_realm (context, cred->client);
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if (start_time)
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cred->times.starttime = now + start_time;
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if (options->flags & KRB5_GET_INIT_CREDS_OPT_TKT_LIFE)
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tmp = options->tkt_life;
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else
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tmp = 10 * 60 * 60;
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cred->times.endtime = now + tmp;
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if ((options->flags & KRB5_GET_INIT_CREDS_OPT_RENEW_LIFE) &&
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options->renew_life > 0) {
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cred->times.renew_till = now + options->renew_life;
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}
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if (in_tkt_service) {
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krb5_realm server_realm;
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ret = krb5_parse_name (context, in_tkt_service, &cred->server);
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if (ret)
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goto out;
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server_realm = strdup (*client_realm);
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free (*krb5_princ_realm(context, cred->server));
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krb5_princ_set_realm (context, cred->server, &server_realm);
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} else {
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ret = krb5_make_principal(context, &cred->server,
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*client_realm, KRB5_TGS_NAME, *client_realm,
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NULL);
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if (ret)
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goto out;
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}
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return 0;
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out:
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krb5_free_creds_contents (context, cred);
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return ret;
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}
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/*
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* Print a message (str) to the user about the expiration in `lr'
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*/
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static void
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report_expiration (krb5_context context,
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krb5_prompter_fct prompter,
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krb5_data *data,
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const char *str,
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time_t time)
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{
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char *p;
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asprintf (&p, "%s%s", str, ctime(&time));
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(*prompter) (context, data, NULL, p, 0, NULL);
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free (p);
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}
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/*
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* Parse the last_req data and show it to the user if it's interesting
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*/
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static void
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print_expire (krb5_context context,
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krb5_realm *realm,
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krb5_kdc_rep *rep,
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krb5_prompter_fct prompter,
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krb5_data *data)
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{
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int i;
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LastReq *lr = &rep->enc_part.last_req;
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krb5_timestamp sec;
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time_t t;
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krb5_boolean reported = FALSE;
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krb5_timeofday (context, &sec);
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t = sec + get_config_time (context,
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*realm,
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"warn_pwexpire",
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7 * 24 * 60 * 60);
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for (i = 0; i < lr->len; ++i) {
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if (lr->val[i].lr_value <= t) {
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switch (abs(lr->val[i].lr_type)) {
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case LR_PW_EXPTIME :
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report_expiration(context, prompter, data,
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"Your password will expire at ",
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lr->val[i].lr_value);
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reported = TRUE;
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break;
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case LR_ACCT_EXPTIME :
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report_expiration(context, prompter, data,
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"Your account will expire at ",
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lr->val[i].lr_value);
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reported = TRUE;
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break;
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}
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}
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}
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if (!reported
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&& rep->enc_part.key_expiration
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&& *rep->enc_part.key_expiration <= t) {
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report_expiration(context, prompter, data,
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"Your password/account will expire at ",
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*rep->enc_part.key_expiration);
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}
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}
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static krb5_error_code
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get_init_creds_common(krb5_context context,
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krb5_creds *creds,
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krb5_principal client,
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krb5_deltat start_time,
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const char *in_tkt_service,
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krb5_get_init_creds_opt *options,
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krb5_addresses **addrs,
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krb5_enctype **etypes,
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krb5_creds *cred,
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krb5_preauthtype **pre_auth_types,
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krb5_kdc_flags *flags)
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{
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krb5_error_code ret;
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krb5_realm *client_realm;
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krb5_get_init_creds_opt default_opt;
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if (options == NULL) {
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krb5_get_init_creds_opt_init (&default_opt);
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options = &default_opt;
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}
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ret = init_cred (context, cred, client, start_time,
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in_tkt_service, options);
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if (ret)
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return ret;
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client_realm = krb5_princ_realm (context, cred->client);
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flags->i = 0;
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if (options->flags & KRB5_GET_INIT_CREDS_OPT_FORWARDABLE)
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flags->b.forwardable = options->forwardable;
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if (options->flags & KRB5_GET_INIT_CREDS_OPT_PROXIABLE)
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flags->b.proxiable = options->proxiable;
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if (start_time)
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flags->b.postdated = 1;
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if (cred->times.renew_till)
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flags->b.renewable = 1;
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if (options->flags & KRB5_GET_INIT_CREDS_OPT_ADDRESS_LIST)
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*addrs = options->address_list;
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if (options->flags & KRB5_GET_INIT_CREDS_OPT_ETYPE_LIST) {
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*etypes = malloc((options->etype_list_length + 1)
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* sizeof(krb5_enctype));
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if (*etypes == NULL) {
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krb5_set_error_string(context, "malloc: out of memory");
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return ENOMEM;
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}
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memcpy (*etypes, options->etype_list,
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options->etype_list_length * sizeof(krb5_enctype));
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(*etypes)[options->etype_list_length] = ETYPE_NULL;
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}
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if (options->flags & KRB5_GET_INIT_CREDS_OPT_PREAUTH_LIST) {
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*pre_auth_types = malloc((options->preauth_list_length + 1)
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* sizeof(krb5_preauthtype));
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if (*pre_auth_types == NULL) {
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krb5_set_error_string(context, "malloc: out of memory");
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return ENOMEM;
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}
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memcpy (*pre_auth_types, options->preauth_list,
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options->preauth_list_length * sizeof(krb5_preauthtype));
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(*pre_auth_types)[options->preauth_list_length] = KRB5_PADATA_NONE;
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}
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if (options->flags & KRB5_GET_INIT_CREDS_OPT_SALT)
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; /* XXX */
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if (options->flags & KRB5_GET_INIT_CREDS_OPT_ANONYMOUS)
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flags->b.request_anonymous = options->anonymous;
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return 0;
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}
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static krb5_error_code
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change_password (krb5_context context,
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krb5_principal client,
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const char *password,
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char *newpw,
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size_t newpw_sz,
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krb5_prompter_fct prompter,
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void *data,
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krb5_get_init_creds_opt *old_options)
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{
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krb5_prompt prompts[2];
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krb5_error_code ret;
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krb5_creds cpw_cred;
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char buf1[BUFSIZ], buf2[BUFSIZ];
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krb5_data password_data[2];
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int result_code;
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krb5_data result_code_string;
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krb5_data result_string;
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char *p;
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krb5_get_init_creds_opt options;
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memset (&cpw_cred, 0, sizeof(cpw_cred));
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krb5_get_init_creds_opt_init (&options);
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krb5_get_init_creds_opt_set_tkt_life (&options, 60);
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krb5_get_init_creds_opt_set_forwardable (&options, FALSE);
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krb5_get_init_creds_opt_set_proxiable (&options, FALSE);
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if (old_options->flags & KRB5_GET_INIT_CREDS_OPT_PREAUTH_LIST)
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krb5_get_init_creds_opt_set_preauth_list (&options,
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old_options->preauth_list,
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old_options->preauth_list_length);
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krb5_data_zero (&result_code_string);
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krb5_data_zero (&result_string);
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ret = krb5_get_init_creds_password (context,
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&cpw_cred,
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client,
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password,
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prompter,
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data,
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0,
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"kadmin/changepw",
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&options);
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if (ret)
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goto out;
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for(;;) {
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password_data[0].data = buf1;
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password_data[0].length = sizeof(buf1);
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prompts[0].hidden = 1;
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prompts[0].prompt = "New password: ";
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prompts[0].reply = &password_data[0];
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prompts[0].type = KRB5_PROMPT_TYPE_NEW_PASSWORD;
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password_data[1].data = buf2;
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password_data[1].length = sizeof(buf2);
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prompts[1].hidden = 1;
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prompts[1].prompt = "Repeat new password: ";
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prompts[1].reply = &password_data[1];
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prompts[1].type = KRB5_PROMPT_TYPE_NEW_PASSWORD_AGAIN;
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ret = (*prompter) (context, data, NULL, "Changing password",
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2, prompts);
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if (ret) {
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memset (buf1, 0, sizeof(buf1));
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memset (buf2, 0, sizeof(buf2));
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goto out;
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}
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if (strcmp (buf1, buf2) == 0)
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break;
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memset (buf1, 0, sizeof(buf1));
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memset (buf2, 0, sizeof(buf2));
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}
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ret = krb5_change_password (context,
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&cpw_cred,
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buf1,
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&result_code,
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&result_code_string,
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&result_string);
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if (ret)
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goto out;
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asprintf (&p, "%s: %.*s\n",
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result_code ? "Error" : "Success",
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(int)result_string.length,
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(char*)result_string.data);
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ret = (*prompter) (context, data, NULL, p, 0, NULL);
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free (p);
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if (result_code == 0) {
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strlcpy (newpw, buf1, newpw_sz);
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ret = 0;
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} else {
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krb5_set_error_string (context, "failed changing password");
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ret = ENOTTY;
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}
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out:
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memset (buf1, 0, sizeof(buf1));
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memset (buf2, 0, sizeof(buf2));
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krb5_data_free (&result_string);
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krb5_data_free (&result_code_string);
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krb5_free_creds_contents (context, &cpw_cred);
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return ret;
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}
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krb5_error_code
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krb5_get_init_creds_password(krb5_context context,
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krb5_creds *creds,
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krb5_principal client,
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const char *password,
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krb5_prompter_fct prompter,
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void *data,
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krb5_deltat start_time,
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const char *in_tkt_service,
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krb5_get_init_creds_opt *options)
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{
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krb5_error_code ret;
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krb5_kdc_flags flags;
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krb5_addresses *addrs = NULL;
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krb5_enctype *etypes = NULL;
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krb5_preauthtype *pre_auth_types = NULL;
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krb5_creds this_cred;
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krb5_kdc_rep kdc_reply;
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char buf[BUFSIZ];
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krb5_data password_data;
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int done;
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ret = get_init_creds_common(context, creds, client, start_time,
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in_tkt_service, options,
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&addrs, &etypes, &this_cred, &pre_auth_types,
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&flags);
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if(ret)
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goto out;
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if (password == NULL) {
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krb5_prompt prompt;
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char *p, *q;
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krb5_unparse_name (context, this_cred.client, &p);
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asprintf (&q, "%s's Password: ", p);
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free (p);
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prompt.prompt = q;
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password_data.data = buf;
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password_data.length = sizeof(buf);
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prompt.hidden = 1;
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prompt.reply = &password_data;
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prompt.type = KRB5_PROMPT_TYPE_PASSWORD;
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ret = (*prompter) (context, data, NULL, NULL, 1, &prompt);
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free (q);
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if (ret) {
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memset (buf, 0, sizeof(buf));
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ret = KRB5_LIBOS_PWDINTR;
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krb5_clear_error_string (context);
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goto out;
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}
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password = password_data.data;
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}
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done = 0;
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while(!done) {
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memset(&kdc_reply, 0, sizeof(kdc_reply));
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ret = krb5_get_in_cred (context,
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flags.i,
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addrs,
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etypes,
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pre_auth_types,
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NULL,
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krb5_password_key_proc,
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password,
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NULL,
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NULL,
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&this_cred,
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&kdc_reply);
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switch (ret) {
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case 0 :
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done = 1;
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break;
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case KRB5KDC_ERR_KEY_EXPIRED :
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/* try to avoid recursion */
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krb5_clear_error_string (context);
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if (in_tkt_service != NULL
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&& strcmp (in_tkt_service, "kadmin/changepw") == 0)
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goto out;
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ret = change_password (context,
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client,
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password,
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buf,
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sizeof(buf),
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prompter,
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data,
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options);
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if (ret)
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goto out;
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password = buf;
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break;
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default:
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goto out;
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}
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}
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if (prompter)
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print_expire (context,
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krb5_princ_realm (context, this_cred.client),
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&kdc_reply,
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prompter,
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data);
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out:
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memset (buf, 0, sizeof(buf));
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if (ret == 0)
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krb5_free_kdc_rep (context, &kdc_reply);
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free (pre_auth_types);
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free (etypes);
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if (ret == 0 && creds)
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*creds = this_cred;
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else
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krb5_free_creds_contents (context, &this_cred);
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return ret;
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}
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|
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krb5_error_code
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krb5_keyblock_key_proc (krb5_context context,
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krb5_keytype type,
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krb5_data *salt,
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krb5_const_pointer keyseed,
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krb5_keyblock **key)
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{
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return krb5_copy_keyblock (context, keyseed, key);
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}
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krb5_error_code
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krb5_get_init_creds_keytab(krb5_context context,
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krb5_creds *creds,
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krb5_principal client,
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krb5_keytab keytab,
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krb5_deltat start_time,
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const char *in_tkt_service,
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krb5_get_init_creds_opt *options)
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|
{
|
|
krb5_error_code ret;
|
|
krb5_kdc_flags flags;
|
|
krb5_addresses *addrs = NULL;
|
|
krb5_enctype *etypes = NULL;
|
|
krb5_preauthtype *pre_auth_types = NULL;
|
|
krb5_creds this_cred;
|
|
krb5_keytab_key_proc_args *a;
|
|
|
|
ret = get_init_creds_common(context, creds, client, start_time,
|
|
in_tkt_service, options,
|
|
&addrs, &etypes, &this_cred, &pre_auth_types,
|
|
&flags);
|
|
if(ret)
|
|
goto out;
|
|
|
|
a = malloc (sizeof(*a));
|
|
if (a == NULL) {
|
|
krb5_set_error_string(context, "malloc: out of memory");
|
|
ret = ENOMEM;
|
|
goto out;
|
|
}
|
|
a->principal = this_cred.client;
|
|
a->keytab = keytab;
|
|
|
|
ret = krb5_get_in_cred (context,
|
|
flags.i,
|
|
addrs,
|
|
etypes,
|
|
pre_auth_types,
|
|
NULL,
|
|
krb5_keytab_key_proc,
|
|
a,
|
|
NULL,
|
|
NULL,
|
|
&this_cred,
|
|
NULL);
|
|
free (a);
|
|
|
|
if (ret)
|
|
goto out;
|
|
free (pre_auth_types);
|
|
free (etypes);
|
|
if (creds)
|
|
*creds = this_cred;
|
|
else
|
|
krb5_free_creds_contents (context, &this_cred);
|
|
return 0;
|
|
|
|
out:
|
|
free (pre_auth_types);
|
|
free (etypes);
|
|
krb5_free_creds_contents (context, &this_cred);
|
|
return ret;
|
|
}
|