OpenBSD-4.6/kerberosV/src/lib/krb5/verify_user.c
/*
* Copyright (c) 1997-2004 Kungliga Tekniska Högskolan
* (Royal Institute of Technology, Stockholm, Sweden).
* 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. Neither the name of the Institute 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 INSTITUTE 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 INSTITUTE 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.
*/
#include "krb5_locl.h"
RCSID("$KTH: verify_user.c,v 1.22 2004/05/25 21:46:06 lha Exp $");
static krb5_error_code
verify_common (krb5_context context,
krb5_principal principal,
krb5_ccache ccache,
krb5_keytab keytab,
krb5_boolean secure,
const char *service,
krb5_creds cred)
{
krb5_error_code ret;
krb5_principal server;
krb5_verify_init_creds_opt vopt;
krb5_ccache id;
ret = krb5_sname_to_principal (context, NULL, service, KRB5_NT_SRV_HST,
&server);
if(ret)
return ret;
krb5_verify_init_creds_opt_init(&vopt);
krb5_verify_init_creds_opt_set_ap_req_nofail(&vopt, secure);
ret = krb5_verify_init_creds(context,
&cred,
server,
keytab,
NULL,
&vopt);
krb5_free_principal(context, server);
if(ret)
return ret;
if(ccache == NULL)
ret = krb5_cc_default (context, &id);
else
id = ccache;
if(ret == 0){
ret = krb5_cc_initialize(context, id, principal);
if(ret == 0){
ret = krb5_cc_store_cred(context, id, &cred);
}
if(ccache == NULL)
krb5_cc_close(context, id);
}
krb5_free_cred_contents(context, &cred);
return ret;
}
/*
* Verify user `principal' with `password'.
*
* If `secure', also verify against local service key for `service'.
*
* As a side effect, fresh tickets are obtained and stored in `ccache'.
*/
void KRB5_LIB_FUNCTION
krb5_verify_opt_init(krb5_verify_opt *opt)
{
memset(opt, 0, sizeof(*opt));
opt->secure = TRUE;
opt->service = "host";
}
void KRB5_LIB_FUNCTION
krb5_verify_opt_set_ccache(krb5_verify_opt *opt, krb5_ccache ccache)
{
opt->ccache = ccache;
}
void KRB5_LIB_FUNCTION
krb5_verify_opt_set_keytab(krb5_verify_opt *opt, krb5_keytab keytab)
{
opt->keytab = keytab;
}
void KRB5_LIB_FUNCTION
krb5_verify_opt_set_secure(krb5_verify_opt *opt, krb5_boolean secure)
{
opt->secure = secure;
}
void KRB5_LIB_FUNCTION
krb5_verify_opt_set_service(krb5_verify_opt *opt, const char *service)
{
opt->service = service;
}
void KRB5_LIB_FUNCTION
krb5_verify_opt_set_flags(krb5_verify_opt *opt, unsigned int flags)
{
opt->flags |= flags;
}
static krb5_error_code
verify_user_opt_int(krb5_context context,
krb5_principal principal,
const char *password,
krb5_verify_opt *vopt)
{
krb5_error_code ret;
krb5_get_init_creds_opt *opt;
krb5_creds cred;
ret = krb5_get_init_creds_opt_alloc (context, &opt);
if (ret)
return ret;
krb5_get_init_creds_opt_set_default_flags(context, NULL,
krb5_principal_get_realm(context, principal),
opt);
ret = krb5_get_init_creds_password (context,
&cred,
principal,
password,
krb5_prompter_posix,
NULL,
0,
NULL,
opt);
krb5_get_init_creds_opt_free(opt);
if(ret)
return ret;
#define OPT(V, D) ((vopt && (vopt->V)) ? (vopt->V) : (D))
return verify_common (context, principal, OPT(ccache, NULL),
OPT(keytab, NULL), vopt ? vopt->secure : TRUE,
OPT(service, "host"), cred);
#undef OPT
}
krb5_error_code KRB5_LIB_FUNCTION
krb5_verify_user_opt(krb5_context context,
krb5_principal principal,
const char *password,
krb5_verify_opt *opt)
{
krb5_error_code ret;
if(opt && (opt->flags & KRB5_VERIFY_LREALMS)) {
krb5_realm *realms, *r;
ret = krb5_get_default_realms (context, &realms);
if (ret)
return ret;
ret = KRB5_CONFIG_NODEFREALM;
for (r = realms; *r != NULL && ret != 0; ++r) {
char *tmp = strdup (*r);
if (tmp == NULL) {
krb5_free_host_realm (context, realms);
krb5_set_error_string (context, "malloc: out of memory");
return ENOMEM;
}
free (*krb5_princ_realm (context, principal));
krb5_princ_set_realm (context, principal, &tmp);
ret = verify_user_opt_int(context, principal, password, opt);
}
krb5_free_host_realm (context, realms);
if(ret)
return ret;
} else
ret = verify_user_opt_int(context, principal, password, opt);
return ret;
}
/* compat function that calls above */
krb5_error_code KRB5_LIB_FUNCTION
krb5_verify_user(krb5_context context,
krb5_principal principal,
krb5_ccache ccache,
const char *password,
krb5_boolean secure,
const char *service)
{
krb5_verify_opt opt;
krb5_verify_opt_init(&opt);
krb5_verify_opt_set_ccache(&opt, ccache);
krb5_verify_opt_set_secure(&opt, secure);
krb5_verify_opt_set_service(&opt, service);
return krb5_verify_user_opt(context, principal, password, &opt);
}
/*
* A variant of `krb5_verify_user'. The realm of `principal' is
* ignored and all the local realms are tried.
*/
krb5_error_code KRB5_LIB_FUNCTION
krb5_verify_user_lrealm(krb5_context context,
krb5_principal principal,
krb5_ccache ccache,
const char *password,
krb5_boolean secure,
const char *service)
{
krb5_verify_opt opt;
krb5_verify_opt_init(&opt);
krb5_verify_opt_set_ccache(&opt, ccache);
krb5_verify_opt_set_secure(&opt, secure);
krb5_verify_opt_set_service(&opt, service);
krb5_verify_opt_set_flags(&opt, KRB5_VERIFY_LREALMS);
return krb5_verify_user_opt(context, principal, password, &opt);
}