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/*
* Copyright (c) 1997 - 2005 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("$Id: creds.c,v 1.20 2005/05/18 04:21:04 lha Exp $");
/* keep this for compatibility with older code */
krb5_error_code KRB5_LIB_FUNCTION
krb5_free_creds_contents (krb5_context context, krb5_creds *c)
{
return krb5_free_cred_contents (context, c);
}
krb5_error_code KRB5_LIB_FUNCTION
krb5_free_cred_contents (krb5_context context, krb5_creds *c)
{
krb5_free_principal (context, c->client);
c->client = NULL;
krb5_free_principal (context, c->server);
c->server = NULL;
krb5_free_keyblock_contents (context, &c->session);
krb5_data_free (&c->ticket);
krb5_data_free (&c->second_ticket);
free_AuthorizationData (&c->authdata);
krb5_free_addresses (context, &c->addresses);
memset(c, 0, sizeof(*c));
return 0;
}
krb5_error_code KRB5_LIB_FUNCTION
krb5_copy_creds_contents (krb5_context context,
const krb5_creds *incred,
krb5_creds *c)
{
krb5_error_code ret;
memset(c, 0, sizeof(*c));
ret = krb5_copy_principal (context, incred->client, &c->client);
if (ret)
goto fail;
ret = krb5_copy_principal (context, incred->server, &c->server);
if (ret)
goto fail;
ret = krb5_copy_keyblock_contents (context, &incred->session, &c->session);
if (ret)
goto fail;
c->times = incred->times;
ret = krb5_data_copy (&c->ticket,
incred->ticket.data,
incred->ticket.length);
if (ret)
goto fail;
ret = krb5_data_copy (&c->second_ticket,
incred->second_ticket.data,
incred->second_ticket.length);
if (ret)
goto fail;
ret = copy_AuthorizationData(&incred->authdata, &c->authdata);
if (ret)
goto fail;
ret = krb5_copy_addresses (context,
&incred->addresses,
&c->addresses);
if (ret)
goto fail;
c->flags = incred->flags;
return 0;
fail:
krb5_free_cred_contents (context, c);
return ret;
}
krb5_error_code KRB5_LIB_FUNCTION
krb5_copy_creds (krb5_context context,
const krb5_creds *incred,
krb5_creds **outcred)
{
krb5_creds *c;
c = malloc (sizeof (*c));
if (c == NULL) {
krb5_set_error_string (context, "malloc: out of memory");
return ENOMEM;
}
memset (c, 0, sizeof(*c));
*outcred = c;
return krb5_copy_creds_contents (context, incred, c);
}
krb5_error_code KRB5_LIB_FUNCTION
krb5_free_creds (krb5_context context, krb5_creds *c)
{
krb5_free_cred_contents (context, c);
free (c);
return 0;
}
/* XXX these do not belong here */
static krb5_boolean
krb5_data_equal(const krb5_data *a, const krb5_data *b)
{
if(a->length != b->length)
return FALSE;
return memcmp(a->data, b->data, a->length) == 0;
}
static krb5_boolean
krb5_times_equal(const krb5_times *a, const krb5_times *b)
{
return a->starttime == b->starttime &&
a->authtime == b->authtime &&
a->endtime == b->endtime &&
a->renew_till == b->renew_till;
}
/*
* Return TRUE if `mcreds' and `creds' are equal (`whichfields'
* determines what equal means).
*/
krb5_boolean KRB5_LIB_FUNCTION
krb5_compare_creds(krb5_context context, krb5_flags whichfields,
const krb5_creds * mcreds, const krb5_creds * creds)
{
krb5_boolean match = TRUE;
if (match && mcreds->server) {
if (whichfields & (KRB5_TC_DONT_MATCH_REALM | KRB5_TC_MATCH_SRV_NAMEONLY))
match = krb5_principal_compare_any_realm (context, mcreds->server,
creds->server);
else
match = krb5_principal_compare (context, mcreds->server,
creds->server);
}
if (match && mcreds->client) {
if(whichfields & KRB5_TC_DONT_MATCH_REALM)
match = krb5_principal_compare_any_realm (context, mcreds->client,
creds->client);
else
match = krb5_principal_compare (context, mcreds->client,
creds->client);
}
if (match && (whichfields & KRB5_TC_MATCH_KEYTYPE))
match = krb5_enctypes_compatible_keys(context,
mcreds->session.keytype,
creds->session.keytype);
if (match && (whichfields & KRB5_TC_MATCH_FLAGS_EXACT))
match = mcreds->flags.i == creds->flags.i;
if (match && (whichfields & KRB5_TC_MATCH_FLAGS))
match = (creds->flags.i & mcreds->flags.i) == mcreds->flags.i;
if (match && (whichfields & KRB5_TC_MATCH_TIMES_EXACT))
match = krb5_times_equal(&mcreds->times, &creds->times);
if (match && (whichfields & KRB5_TC_MATCH_TIMES))
/* compare only expiration times */
match = (mcreds->times.renew_till <= creds->times.renew_till) &&
(mcreds->times.endtime <= creds->times.endtime);
if (match && (whichfields & KRB5_TC_MATCH_AUTHDATA)) {
unsigned int i;
if(mcreds->authdata.len != creds->authdata.len)
match = FALSE;
else
for(i = 0; match && i < mcreds->authdata.len; i++)
match = (mcreds->authdata.val[i].ad_type ==
creds->authdata.val[i].ad_type) &&
krb5_data_equal(&mcreds->authdata.val[i].ad_data,
&creds->authdata.val[i].ad_data);
}
if (match && (whichfields & KRB5_TC_MATCH_2ND_TKT))
match = krb5_data_equal(&mcreds->second_ticket, &creds->second_ticket);
if (match && (whichfields & KRB5_TC_MATCH_IS_SKEY))
match = ((mcreds->second_ticket.length == 0) ==
(creds->second_ticket.length == 0));
return match;
}
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