258 lines
6.7 KiB
C
258 lines
6.7 KiB
C
/*
|
|
* Copyright (c) 1997 - 2001 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: rd_cred.c,v 1.12 2001/01/04 16:19:00 joda Exp $");
|
|
|
|
krb5_error_code
|
|
krb5_rd_cred(krb5_context context,
|
|
krb5_auth_context auth_context,
|
|
krb5_data *in_data,
|
|
krb5_creds ***ret_creds,
|
|
krb5_replay_data *out_data)
|
|
{
|
|
krb5_error_code ret;
|
|
size_t len;
|
|
KRB_CRED cred;
|
|
EncKrbCredPart enc_krb_cred_part;
|
|
krb5_data enc_krb_cred_part_data;
|
|
krb5_crypto crypto;
|
|
int i;
|
|
|
|
ret = decode_KRB_CRED(in_data->data, in_data->length,
|
|
&cred, &len);
|
|
if(ret)
|
|
return ret;
|
|
|
|
if (cred.pvno != 5) {
|
|
ret = KRB5KRB_AP_ERR_BADVERSION;
|
|
goto out;
|
|
}
|
|
|
|
if (cred.msg_type != krb_cred) {
|
|
ret = KRB5KRB_AP_ERR_MSG_TYPE;
|
|
goto out;
|
|
}
|
|
|
|
if (cred.enc_part.etype == ETYPE_NULL) {
|
|
/* DK: MIT GSS-API Compatibility */
|
|
enc_krb_cred_part_data.length = cred.enc_part.cipher.length;
|
|
enc_krb_cred_part_data.data = cred.enc_part.cipher.data;
|
|
} else {
|
|
if (auth_context->remote_subkey)
|
|
ret = krb5_crypto_init(context, auth_context->remote_subkey,
|
|
0, &crypto);
|
|
else
|
|
ret = krb5_crypto_init(context, auth_context->keyblock,
|
|
0, &crypto);
|
|
/* DK: MIT rsh */
|
|
|
|
if (ret)
|
|
goto out;
|
|
|
|
ret = krb5_decrypt_EncryptedData(context,
|
|
crypto,
|
|
KRB5_KU_KRB_CRED,
|
|
&cred.enc_part,
|
|
&enc_krb_cred_part_data);
|
|
|
|
krb5_crypto_destroy(context, crypto);
|
|
if (ret)
|
|
goto out;
|
|
}
|
|
|
|
ret = krb5_decode_EncKrbCredPart (context,
|
|
enc_krb_cred_part_data.data,
|
|
enc_krb_cred_part_data.length,
|
|
&enc_krb_cred_part,
|
|
&len);
|
|
if (ret)
|
|
goto out;
|
|
|
|
/* check sender address */
|
|
|
|
if (enc_krb_cred_part.s_address
|
|
&& auth_context->remote_address
|
|
&& auth_context->remote_port) {
|
|
krb5_address *a;
|
|
int cmp;
|
|
|
|
ret = krb5_make_addrport (&a,
|
|
auth_context->remote_address,
|
|
auth_context->remote_port);
|
|
if (ret)
|
|
goto out;
|
|
|
|
|
|
cmp = krb5_address_compare (context,
|
|
a,
|
|
enc_krb_cred_part.s_address);
|
|
|
|
krb5_free_address (context, a);
|
|
free (a);
|
|
|
|
if (cmp == 0) {
|
|
ret = KRB5KRB_AP_ERR_BADADDR;
|
|
goto out;
|
|
}
|
|
}
|
|
|
|
/* check receiver address */
|
|
|
|
if (enc_krb_cred_part.r_address
|
|
&& auth_context->local_address
|
|
&& !krb5_address_compare (context,
|
|
auth_context->local_address,
|
|
enc_krb_cred_part.r_address)) {
|
|
ret = KRB5KRB_AP_ERR_BADADDR;
|
|
goto out;
|
|
}
|
|
|
|
/* check timestamp */
|
|
if (auth_context->flags & KRB5_AUTH_CONTEXT_DO_TIME) {
|
|
krb5_timestamp sec;
|
|
|
|
krb5_timeofday (context, &sec);
|
|
|
|
if (enc_krb_cred_part.timestamp == NULL ||
|
|
enc_krb_cred_part.usec == NULL ||
|
|
abs(*enc_krb_cred_part.timestamp - sec)
|
|
> context->max_skew) {
|
|
ret = KRB5KRB_AP_ERR_SKEW;
|
|
goto out;
|
|
}
|
|
}
|
|
|
|
if(out_data != NULL) {
|
|
if(enc_krb_cred_part.timestamp)
|
|
out_data->timestamp = *enc_krb_cred_part.timestamp;
|
|
else
|
|
out_data->timestamp = 0;
|
|
if(enc_krb_cred_part.usec)
|
|
out_data->usec = *enc_krb_cred_part.usec;
|
|
else
|
|
out_data->usec = 0;
|
|
if(enc_krb_cred_part.nonce)
|
|
out_data->seq = *enc_krb_cred_part.nonce;
|
|
else
|
|
out_data->seq = 0;
|
|
}
|
|
|
|
/* Convert to NULL terminated list of creds */
|
|
|
|
*ret_creds = calloc(enc_krb_cred_part.ticket_info.len + 1,
|
|
sizeof(**ret_creds));
|
|
|
|
for (i = 0; i < enc_krb_cred_part.ticket_info.len; ++i) {
|
|
KrbCredInfo *kci = &enc_krb_cred_part.ticket_info.val[i];
|
|
krb5_creds *creds;
|
|
u_char buf[1024];
|
|
size_t len;
|
|
|
|
creds = calloc(1, sizeof(*creds));
|
|
if(creds == NULL) {
|
|
ret = ENOMEM;
|
|
goto out;
|
|
}
|
|
|
|
ret = encode_Ticket (buf + sizeof(buf) - 1, sizeof(buf),
|
|
&cred.tickets.val[i],
|
|
&len);
|
|
if (ret)
|
|
goto out;
|
|
krb5_data_copy (&creds->ticket, buf + sizeof(buf) - len, len);
|
|
copy_EncryptionKey (&kci->key, &creds->session);
|
|
if (kci->prealm && kci->pname)
|
|
principalname2krb5_principal (&creds->client,
|
|
*kci->pname,
|
|
*kci->prealm);
|
|
if (kci->flags)
|
|
creds->flags.b = *kci->flags;
|
|
if (kci->authtime)
|
|
creds->times.authtime = *kci->authtime;
|
|
if (kci->starttime)
|
|
creds->times.starttime = *kci->starttime;
|
|
if (kci->endtime)
|
|
creds->times.endtime = *kci->endtime;
|
|
if (kci->renew_till)
|
|
creds->times.renew_till = *kci->renew_till;
|
|
if (kci->srealm && kci->sname)
|
|
principalname2krb5_principal (&creds->server,
|
|
*kci->sname,
|
|
*kci->srealm);
|
|
if (kci->caddr)
|
|
krb5_copy_addresses (context,
|
|
kci->caddr,
|
|
&creds->addresses);
|
|
|
|
(*ret_creds)[i] = creds;
|
|
|
|
}
|
|
(*ret_creds)[i] = NULL;
|
|
return 0;
|
|
|
|
out:
|
|
free_KRB_CRED (&cred);
|
|
if(*ret_creds) {
|
|
for(i = 0; (*ret_creds)[i]; i++)
|
|
krb5_free_creds(context, (*ret_creds)[i]);
|
|
free(*ret_creds);
|
|
}
|
|
return ret;
|
|
}
|
|
|
|
krb5_error_code
|
|
krb5_rd_cred2 (krb5_context context,
|
|
krb5_auth_context auth_context,
|
|
krb5_ccache ccache,
|
|
krb5_data *in_data)
|
|
{
|
|
krb5_error_code ret;
|
|
krb5_creds **creds;
|
|
int i;
|
|
|
|
ret = krb5_rd_cred(context, auth_context, in_data, &creds, NULL);
|
|
if(ret)
|
|
return ret;
|
|
|
|
/* Store the creds in the ccache */
|
|
|
|
for(i = 0; creds && creds[i]; i++) {
|
|
krb5_cc_store_cred(context, ccache, creds[i]);
|
|
krb5_free_creds(context, creds[i]);
|
|
}
|
|
free(creds);
|
|
return 0;
|
|
}
|