2027 lines
55 KiB
C
2027 lines
55 KiB
C
/*
|
|
* Copyright (c) 1997 - 2008 Kungliga Tekniska Högskolan
|
|
* (Royal Institute of Technology, Stockholm, Sweden).
|
|
* All rights reserved.
|
|
*
|
|
* Portions Copyright (c) 2009 - 2010 Apple Inc. 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"
|
|
#include <assert.h>
|
|
|
|
static krb5_error_code
|
|
get_cred_kdc_capath(krb5_context, krb5_kdc_flags,
|
|
krb5_ccache, struct krb5_fast_state *,
|
|
krb5_creds *, krb5_principal,
|
|
Ticket *, const char *, const char *,
|
|
krb5_creds **, krb5_creds ***);
|
|
|
|
/*
|
|
* Take the `body' and encode it into `padata' using the credentials
|
|
* in `creds'.
|
|
*/
|
|
|
|
static krb5_error_code
|
|
make_pa_tgs_req(krb5_context context,
|
|
krb5_auth_context *ac,
|
|
KDC_REQ_BODY *body,
|
|
krb5_ccache ccache,
|
|
krb5_creds *creds,
|
|
krb5_data *tgs_req)
|
|
{
|
|
krb5_error_code ret;
|
|
krb5_data in_data;
|
|
size_t buf_size;
|
|
size_t len = 0;
|
|
uint8_t *buf;
|
|
|
|
ASN1_MALLOC_ENCODE(KDC_REQ_BODY, buf, buf_size, body, &len, ret);
|
|
if (ret)
|
|
return ret;
|
|
|
|
if(buf_size != len)
|
|
krb5_abortx(context, "internal error in ASN.1 encoder");
|
|
|
|
in_data.length = len;
|
|
in_data.data = buf;
|
|
ret = _krb5_mk_req_internal(context, ac, 0, &in_data,
|
|
creds, tgs_req,
|
|
KRB5_KU_TGS_REQ_AUTH_CKSUM,
|
|
KRB5_KU_TGS_REQ_AUTH);
|
|
free (buf);
|
|
return ret;
|
|
}
|
|
|
|
/*
|
|
* Set the `enc-authorization-data' in `req_body' based on `authdata'
|
|
*/
|
|
|
|
static krb5_error_code
|
|
set_auth_data (krb5_context context,
|
|
KDC_REQ_BODY *req_body,
|
|
krb5_authdata *authdata,
|
|
krb5_keyblock *subkey)
|
|
{
|
|
if(authdata->len) {
|
|
size_t len = 0, buf_size;
|
|
unsigned char *buf;
|
|
krb5_crypto crypto;
|
|
krb5_error_code ret;
|
|
|
|
ASN1_MALLOC_ENCODE(AuthorizationData, buf, buf_size, authdata,
|
|
&len, ret);
|
|
if (ret)
|
|
return ret;
|
|
if (buf_size != len)
|
|
krb5_abortx(context, "internal error in ASN.1 encoder");
|
|
|
|
ALLOC(req_body->enc_authorization_data, 1);
|
|
if (req_body->enc_authorization_data == NULL) {
|
|
free (buf);
|
|
return krb5_enomem(context);
|
|
}
|
|
ret = krb5_crypto_init(context, subkey, 0, &crypto);
|
|
if (ret) {
|
|
free (buf);
|
|
free (req_body->enc_authorization_data);
|
|
req_body->enc_authorization_data = NULL;
|
|
return ret;
|
|
}
|
|
ret = krb5_encrypt_EncryptedData(context,
|
|
crypto,
|
|
KRB5_KU_TGS_REQ_AUTH_DAT_SUBKEY,
|
|
buf,
|
|
len,
|
|
0,
|
|
req_body->enc_authorization_data);
|
|
free (buf);
|
|
krb5_crypto_destroy(context, crypto);
|
|
return ret;
|
|
} else {
|
|
req_body->enc_authorization_data = NULL;
|
|
return 0;
|
|
}
|
|
}
|
|
|
|
/*
|
|
* Create a tgs-req in `t' with `addresses', `flags', `second_ticket'
|
|
* (if not-NULL), `in_creds', `krbtgt', and returning the generated
|
|
* subkey in `subkey'.
|
|
*/
|
|
|
|
static krb5_error_code
|
|
init_tgs_req (krb5_context context,
|
|
krb5_ccache ccache,
|
|
struct krb5_fast_state *state,
|
|
krb5_addresses *addresses,
|
|
krb5_kdc_flags flags,
|
|
Ticket *second_ticket,
|
|
krb5_creds *in_creds,
|
|
krb5_creds *krbtgt,
|
|
unsigned nonce,
|
|
const METHOD_DATA *padata,
|
|
krb5_keyblock **subkey,
|
|
TGS_REQ *t)
|
|
{
|
|
krb5_auth_context ac = NULL;
|
|
krb5_error_code ret = 0;
|
|
krb5_data tgs_req;
|
|
|
|
krb5_data_zero(&tgs_req);
|
|
memset(t, 0, sizeof(*t));
|
|
|
|
t->pvno = 5;
|
|
t->msg_type = krb_tgs_req;
|
|
if (in_creds->session.keytype) {
|
|
ALLOC_SEQ(&t->req_body.etype, 1);
|
|
if(t->req_body.etype.val == NULL) {
|
|
ret = krb5_enomem(context);
|
|
goto fail;
|
|
}
|
|
t->req_body.etype.val[0] = in_creds->session.keytype;
|
|
} else {
|
|
ret = _krb5_init_etype(context,
|
|
KRB5_PDU_TGS_REQUEST,
|
|
&t->req_body.etype.len,
|
|
&t->req_body.etype.val,
|
|
NULL);
|
|
}
|
|
if (ret)
|
|
goto fail;
|
|
t->req_body.addresses = addresses;
|
|
t->req_body.kdc_options = flags.b;
|
|
t->req_body.kdc_options.forwardable = krbtgt->flags.b.forwardable;
|
|
t->req_body.kdc_options.renewable = krbtgt->flags.b.renewable;
|
|
t->req_body.kdc_options.proxiable = krbtgt->flags.b.proxiable;
|
|
ret = copy_Realm(&in_creds->server->realm, &t->req_body.realm);
|
|
if (ret)
|
|
goto fail;
|
|
ALLOC(t->req_body.sname, 1);
|
|
if (t->req_body.sname == NULL) {
|
|
ret = krb5_enomem(context);
|
|
goto fail;
|
|
}
|
|
|
|
/* some versions of some code might require that the client be
|
|
present in TGS-REQs, but this is clearly against the spec */
|
|
|
|
ret = copy_PrincipalName(&in_creds->server->name, t->req_body.sname);
|
|
if (ret)
|
|
goto fail;
|
|
|
|
if (krbtgt->times.starttime) {
|
|
ALLOC(t->req_body.from, 1);
|
|
if(t->req_body.from == NULL){
|
|
ret = krb5_enomem(context);
|
|
goto fail;
|
|
}
|
|
*t->req_body.from = in_creds->times.starttime;
|
|
}
|
|
|
|
/* req_body.till should be NULL if there is no endtime specified,
|
|
but old MIT code (like DCE secd) doesn't like that */
|
|
ALLOC(t->req_body.till, 1);
|
|
if(t->req_body.till == NULL){
|
|
ret = krb5_enomem(context);
|
|
goto fail;
|
|
}
|
|
*t->req_body.till = in_creds->times.endtime;
|
|
|
|
if (t->req_body.kdc_options.renewable && krbtgt->times.renew_till) {
|
|
ALLOC(t->req_body.rtime, 1);
|
|
if(t->req_body.rtime == NULL){
|
|
ret = krb5_enomem(context);
|
|
goto fail;
|
|
}
|
|
*t->req_body.rtime = in_creds->times.renew_till;
|
|
}
|
|
|
|
t->req_body.nonce = nonce;
|
|
if(second_ticket){
|
|
ALLOC(t->req_body.additional_tickets, 1);
|
|
if (t->req_body.additional_tickets == NULL) {
|
|
ret = krb5_enomem(context);
|
|
goto fail;
|
|
}
|
|
ALLOC_SEQ(t->req_body.additional_tickets, 1);
|
|
if (t->req_body.additional_tickets->val == NULL) {
|
|
ret = krb5_enomem(context);
|
|
goto fail;
|
|
}
|
|
ret = copy_Ticket(second_ticket, t->req_body.additional_tickets->val);
|
|
if (ret)
|
|
goto fail;
|
|
}
|
|
|
|
ret = krb5_auth_con_init(context, &ac);
|
|
if(ret)
|
|
goto fail;
|
|
|
|
ret = krb5_auth_con_generatelocalsubkey(context, ac, &krbtgt->session);
|
|
if (ret)
|
|
goto fail;
|
|
|
|
if (state) {
|
|
krb5_data empty;
|
|
|
|
krb5_data_zero(&empty);
|
|
ret = krb5_auth_con_add_AuthorizationData(context, ac,
|
|
KRB5_AUTHDATA_FX_FAST_USED,
|
|
&empty);
|
|
if (ret)
|
|
goto fail;
|
|
}
|
|
|
|
ret = set_auth_data(context, &t->req_body,
|
|
&in_creds->authdata, ac->local_subkey);
|
|
if (ret)
|
|
goto fail;
|
|
|
|
ret = make_pa_tgs_req(context,
|
|
&ac,
|
|
&t->req_body,
|
|
ccache,
|
|
krbtgt,
|
|
&tgs_req);
|
|
if(ret)
|
|
goto fail;
|
|
|
|
/*
|
|
* Add KRB5_PADATA_TGS_REQ first
|
|
* followed by all others.
|
|
*/
|
|
|
|
if (t->padata == NULL) {
|
|
ALLOC(t->padata, 1);
|
|
if (t->padata == NULL) {
|
|
ret = krb5_enomem(context);
|
|
goto fail;
|
|
}
|
|
}
|
|
|
|
ret = krb5_padata_add(context, t->padata, KRB5_PADATA_TGS_REQ,
|
|
tgs_req.data, tgs_req.length);
|
|
if (ret)
|
|
goto fail;
|
|
|
|
krb5_data_zero(&tgs_req);
|
|
|
|
{
|
|
size_t i;
|
|
for (i = 0; i < padata->len; i++) {
|
|
const PA_DATA *val1 = &padata->val[i];
|
|
PA_DATA val2;
|
|
|
|
ret = copy_PA_DATA(val1, &val2);
|
|
if (ret) {
|
|
krb5_set_error_message(context, ret,
|
|
N_("malloc: out of memory", ""));
|
|
goto fail;
|
|
}
|
|
|
|
ret = krb5_padata_add(context, t->padata,
|
|
val2.padata_type,
|
|
val2.padata_value.data,
|
|
val2.padata_value.length);
|
|
if (ret) {
|
|
free_PA_DATA(&val2);
|
|
|
|
krb5_set_error_message(context, ret,
|
|
N_("malloc: out of memory", ""));
|
|
goto fail;
|
|
}
|
|
}
|
|
}
|
|
|
|
if (state) {
|
|
state->armor_ac = ac;
|
|
ret = _krb5_fast_create_armor(context, state, NULL);
|
|
state->armor_ac = NULL;
|
|
if (ret)
|
|
goto fail;
|
|
|
|
ret = _krb5_fast_wrap_req(context, state, t);
|
|
if (ret)
|
|
goto fail;
|
|
|
|
/* Its ok if there is no fast in the TGS-REP, older heimdal only support it in the AS code path */
|
|
state->flags &= ~KRB5_FAST_EXPECTED;
|
|
}
|
|
|
|
ret = krb5_auth_con_getlocalsubkey(context, ac, subkey);
|
|
if (ret)
|
|
goto fail;
|
|
|
|
fail:
|
|
if (ac)
|
|
krb5_auth_con_free(context, ac);
|
|
if (ret) {
|
|
t->req_body.addresses = NULL;
|
|
free_TGS_REQ (t);
|
|
}
|
|
krb5_data_free(&tgs_req);
|
|
|
|
return ret;
|
|
}
|
|
|
|
KRB5_LIB_FUNCTION krb5_error_code KRB5_LIB_CALL
|
|
_krb5_get_krbtgt(krb5_context context,
|
|
krb5_ccache id,
|
|
krb5_realm realm,
|
|
krb5_creds **cred)
|
|
{
|
|
krb5_error_code ret;
|
|
krb5_creds tmp_cred;
|
|
|
|
memset(&tmp_cred, 0, sizeof(tmp_cred));
|
|
|
|
ret = krb5_cc_get_principal(context, id, &tmp_cred.client);
|
|
if (ret)
|
|
return ret;
|
|
|
|
if (realm == NULL)
|
|
realm = tmp_cred.client->realm;
|
|
|
|
ret = krb5_make_principal(context,
|
|
&tmp_cred.server,
|
|
realm,
|
|
KRB5_TGS_NAME,
|
|
realm,
|
|
NULL);
|
|
if(ret) {
|
|
krb5_free_principal(context, tmp_cred.client);
|
|
return ret;
|
|
}
|
|
/*
|
|
* The forwardable TGT might not be the start TGT, in which case, it is
|
|
* generally, but not always already cached. Just in case, get it again if
|
|
* lost.
|
|
*/
|
|
ret = krb5_get_credentials(context,
|
|
0,
|
|
id,
|
|
&tmp_cred,
|
|
cred);
|
|
krb5_free_principal(context, tmp_cred.client);
|
|
krb5_free_principal(context, tmp_cred.server);
|
|
if(ret)
|
|
return ret;
|
|
return 0;
|
|
}
|
|
|
|
static krb5_error_code
|
|
fast_tgs_strengthen_key(krb5_context context,
|
|
struct krb5_fast_state *state,
|
|
krb5_keyblock *reply_key,
|
|
krb5_keyblock *extract_key)
|
|
{
|
|
krb5_error_code ret;
|
|
|
|
if (state && state->strengthen_key) {
|
|
_krb5_debug(context, 5, "_krb5_fast_tgs_strengthen_key");
|
|
|
|
if (state->strengthen_key->keytype != reply_key->keytype) {
|
|
krb5_set_error_message(context, KRB5KRB_AP_ERR_MODIFIED,
|
|
N_("strengthen_key %d not same enctype as reply key %d", ""),
|
|
state->strengthen_key->keytype, reply_key->keytype);
|
|
return KRB5KRB_AP_ERR_MODIFIED;
|
|
}
|
|
|
|
ret = _krb5_fast_cf2(context,
|
|
state->strengthen_key,
|
|
"strengthenkey",
|
|
reply_key,
|
|
"replykey",
|
|
extract_key,
|
|
NULL);
|
|
if (ret)
|
|
return ret;
|
|
} else {
|
|
ret = krb5_copy_keyblock_contents(context, reply_key, extract_key);
|
|
if (ret)
|
|
return ret;
|
|
}
|
|
|
|
return 0;
|
|
}
|
|
|
|
/* DCE compatible decrypt proc */
|
|
static krb5_error_code KRB5_CALLCONV
|
|
decrypt_tkt_with_subkey (krb5_context context,
|
|
krb5_keyblock *key,
|
|
krb5_key_usage usage,
|
|
krb5_const_pointer skey,
|
|
krb5_kdc_rep *dec_rep)
|
|
{
|
|
struct krb5_decrypt_tkt_with_subkey_state *state;
|
|
krb5_error_code ret = 0;
|
|
krb5_data data;
|
|
size_t size;
|
|
krb5_crypto crypto;
|
|
krb5_keyblock extract_key;
|
|
|
|
state = (struct krb5_decrypt_tkt_with_subkey_state *)skey;
|
|
|
|
assert(usage == 0);
|
|
|
|
krb5_data_zero(&data);
|
|
|
|
/*
|
|
* start out with trying with subkey if we have one
|
|
*/
|
|
if (state->subkey) {
|
|
ret = fast_tgs_strengthen_key(context, state->fast_state,
|
|
state->subkey, &extract_key);
|
|
if (ret)
|
|
return ret;
|
|
|
|
ret = krb5_crypto_init(context, &extract_key, 0, &crypto);
|
|
krb5_free_keyblock_contents(context, &extract_key);
|
|
if (ret)
|
|
return ret;
|
|
ret = krb5_decrypt_EncryptedData (context,
|
|
crypto,
|
|
KRB5_KU_TGS_REP_ENC_PART_SUB_KEY,
|
|
&dec_rep->kdc_rep.enc_part,
|
|
&data);
|
|
/*
|
|
* If the is Windows 2000 DC, we need to retry with key usage
|
|
* 8 when doing ARCFOUR.
|
|
*/
|
|
if (ret && state->subkey->keytype == ETYPE_ARCFOUR_HMAC_MD5) {
|
|
ret = krb5_decrypt_EncryptedData(context,
|
|
crypto,
|
|
8,
|
|
&dec_rep->kdc_rep.enc_part,
|
|
&data);
|
|
}
|
|
krb5_crypto_destroy(context, crypto);
|
|
}
|
|
if (state->subkey == NULL || ret) {
|
|
ret = fast_tgs_strengthen_key(context, state->fast_state, key, &extract_key);
|
|
if (ret)
|
|
return ret;
|
|
|
|
ret = krb5_crypto_init(context, key, 0, &crypto);
|
|
if (ret)
|
|
return ret;
|
|
ret = krb5_decrypt_EncryptedData (context,
|
|
crypto,
|
|
KRB5_KU_TGS_REP_ENC_PART_SESSION,
|
|
&dec_rep->kdc_rep.enc_part,
|
|
&data);
|
|
krb5_crypto_destroy(context, crypto);
|
|
}
|
|
if (ret)
|
|
return ret;
|
|
|
|
ret = decode_EncASRepPart(data.data,
|
|
data.length,
|
|
&dec_rep->enc_part,
|
|
&size);
|
|
if (ret)
|
|
ret = decode_EncTGSRepPart(data.data,
|
|
data.length,
|
|
&dec_rep->enc_part,
|
|
&size);
|
|
if (ret)
|
|
krb5_set_error_message(context, ret,
|
|
N_("Failed to decode encpart in ticket", ""));
|
|
krb5_data_free (&data);
|
|
return ret;
|
|
}
|
|
|
|
static krb5_error_code
|
|
get_cred_kdc(krb5_context context,
|
|
krb5_ccache id,
|
|
struct krb5_fast_state *fast_state,
|
|
krb5_kdc_flags flags,
|
|
krb5_addresses *addresses,
|
|
krb5_creds *in_creds,
|
|
krb5_creds *krbtgt,
|
|
krb5_principal impersonate_principal,
|
|
Ticket *second_ticket,
|
|
const char *kdc_hostname,
|
|
const char *sitename,
|
|
krb5_creds *out_creds)
|
|
{
|
|
TGS_REQ req;
|
|
krb5_data enc;
|
|
krb5_data resp;
|
|
krb5_kdc_rep rep;
|
|
krb5_error_code ret;
|
|
unsigned nonce;
|
|
krb5_keyblock *subkey = NULL;
|
|
size_t len = 0;
|
|
Ticket second_ticket_data;
|
|
METHOD_DATA padata;
|
|
|
|
memset(&rep, 0, sizeof(rep));
|
|
krb5_data_zero(&resp);
|
|
krb5_data_zero(&enc);
|
|
padata.val = NULL;
|
|
padata.len = 0;
|
|
|
|
krb5_generate_random_block(&nonce, sizeof(nonce));
|
|
nonce &= 0xffffffff;
|
|
|
|
if(flags.b.enc_tkt_in_skey && second_ticket == NULL){
|
|
ret = decode_Ticket(in_creds->second_ticket.data,
|
|
in_creds->second_ticket.length,
|
|
&second_ticket_data, &len);
|
|
if(ret)
|
|
return ret;
|
|
second_ticket = &second_ticket_data;
|
|
}
|
|
|
|
|
|
if (impersonate_principal) {
|
|
krb5_crypto crypto;
|
|
PA_S4U2Self self;
|
|
krb5_data data;
|
|
void *buf;
|
|
size_t size = 0;
|
|
|
|
self.name = impersonate_principal->name;
|
|
self.realm = impersonate_principal->realm;
|
|
self.auth = estrdup("Kerberos");
|
|
|
|
ret = _krb5_s4u2self_to_checksumdata(context, &self, &data);
|
|
if (ret) {
|
|
free(self.auth);
|
|
goto out;
|
|
}
|
|
|
|
ret = krb5_crypto_init(context, &krbtgt->session, 0, &crypto);
|
|
if (ret) {
|
|
free(self.auth);
|
|
krb5_data_free(&data);
|
|
goto out;
|
|
}
|
|
|
|
ret = krb5_create_checksum(context,
|
|
crypto,
|
|
KRB5_KU_OTHER_CKSUM,
|
|
0,
|
|
data.data,
|
|
data.length,
|
|
&self.cksum);
|
|
krb5_crypto_destroy(context, crypto);
|
|
krb5_data_free(&data);
|
|
if (ret) {
|
|
free(self.auth);
|
|
goto out;
|
|
}
|
|
|
|
ASN1_MALLOC_ENCODE(PA_S4U2Self, buf, len, &self, &size, ret);
|
|
free(self.auth);
|
|
free_Checksum(&self.cksum);
|
|
if (ret)
|
|
goto out;
|
|
if (len != size)
|
|
krb5_abortx(context, "internal asn1 error");
|
|
|
|
ret = krb5_padata_add(context, &padata, KRB5_PADATA_FOR_USER, buf, len);
|
|
if (ret)
|
|
goto out;
|
|
}
|
|
|
|
ret = init_tgs_req (context,
|
|
id,
|
|
fast_state,
|
|
addresses,
|
|
flags,
|
|
second_ticket,
|
|
in_creds,
|
|
krbtgt,
|
|
nonce,
|
|
&padata,
|
|
&subkey,
|
|
&req);
|
|
if (ret)
|
|
goto out;
|
|
|
|
ASN1_MALLOC_ENCODE(TGS_REQ, enc.data, enc.length, &req, &len, ret);
|
|
if (ret)
|
|
goto out;
|
|
if(enc.length != len)
|
|
krb5_abortx(context, "internal error in ASN.1 encoder");
|
|
|
|
/* don't free addresses */
|
|
req.req_body.addresses = NULL;
|
|
free_TGS_REQ(&req);
|
|
|
|
/*
|
|
* Send and receive
|
|
*/
|
|
{
|
|
krb5_sendto_ctx stctx;
|
|
ret = krb5_sendto_ctx_alloc(context, &stctx);
|
|
if (ret)
|
|
return ret;
|
|
krb5_sendto_ctx_set_func(stctx, _krb5_kdc_retry, NULL);
|
|
|
|
if (kdc_hostname)
|
|
krb5_sendto_set_hostname(context, stctx, kdc_hostname);
|
|
if (sitename)
|
|
krb5_sendto_set_sitename(context, stctx, sitename);
|
|
|
|
ret = krb5_sendto_context (context, stctx, &enc,
|
|
krbtgt->server->name.name_string.val[1],
|
|
&resp);
|
|
krb5_sendto_ctx_free(context, stctx);
|
|
}
|
|
if(ret)
|
|
goto out;
|
|
|
|
if(decode_TGS_REP(resp.data, resp.length, &rep.kdc_rep, &len) == 0) {
|
|
struct krb5_decrypt_tkt_with_subkey_state state;
|
|
unsigned eflags = 0;
|
|
krb5_data data;
|
|
size_t size;
|
|
|
|
ASN1_MALLOC_ENCODE(Ticket, data.data, data.length,
|
|
&rep.kdc_rep.ticket, &size, ret);
|
|
if (ret)
|
|
goto out;
|
|
heim_assert(data.length == size, "ASN.1 internal error");
|
|
|
|
ret = _krb5_fast_unwrap_kdc_rep(context, nonce, &data,
|
|
fast_state, &rep.kdc_rep);
|
|
krb5_data_free(&data);
|
|
if (ret)
|
|
goto out;
|
|
|
|
ret = krb5_copy_principal(context,
|
|
in_creds->client,
|
|
&out_creds->client);
|
|
if(ret)
|
|
goto out;
|
|
ret = krb5_copy_principal(context,
|
|
in_creds->server,
|
|
&out_creds->server);
|
|
if(ret)
|
|
goto out;
|
|
/* this should go someplace else */
|
|
out_creds->times.endtime = in_creds->times.endtime;
|
|
|
|
/* XXX should do better testing */
|
|
if (flags.b.cname_in_addl_tkt || impersonate_principal)
|
|
eflags |= EXTRACT_TICKET_ALLOW_CNAME_MISMATCH;
|
|
if (flags.b.request_anonymous)
|
|
eflags |= EXTRACT_TICKET_MATCH_ANON;
|
|
|
|
state.subkey = subkey;
|
|
state.fast_state = fast_state;
|
|
|
|
ret = _krb5_extract_ticket(context,
|
|
&rep,
|
|
out_creds,
|
|
&krbtgt->session,
|
|
NULL,
|
|
0,
|
|
&krbtgt->addresses,
|
|
nonce,
|
|
eflags,
|
|
NULL,
|
|
decrypt_tkt_with_subkey,
|
|
&state);
|
|
} else if(krb5_rd_error(context, &resp, &rep.error) == 0) {
|
|
METHOD_DATA md;
|
|
|
|
memset(&md, 0, sizeof(md));
|
|
|
|
if (rep.error.e_data) {
|
|
ret = decode_METHOD_DATA(rep.error.e_data->data,
|
|
rep.error.e_data->length,
|
|
&md, NULL);
|
|
if (ret) {
|
|
krb5_set_error_message(context, ret,
|
|
N_("Failed to decode METHOD-DATA", ""));
|
|
goto out;
|
|
}
|
|
}
|
|
|
|
ret = _krb5_fast_unwrap_error(context, nonce, fast_state, &md, &rep.error);
|
|
free_METHOD_DATA(&md);
|
|
if (ret)
|
|
goto out;
|
|
|
|
ret = krb5_error_from_rd_error(context, &rep.error, in_creds);
|
|
|
|
/* log the failure */
|
|
if (_krb5_have_debug(context, 5)) {
|
|
const char *str = krb5_get_error_message(context, ret);
|
|
_krb5_debug(context, 5, "parse_tgs_rep: KRB-ERROR %d/%s", ret, str);
|
|
krb5_free_error_message(context, str);
|
|
}
|
|
} else if(resp.length > 0 && ((char*)resp.data)[0] == 4) {
|
|
ret = KRB5KRB_AP_ERR_V4_REPLY;
|
|
krb5_clear_error_message(context);
|
|
} else {
|
|
ret = KRB5KRB_AP_ERR_MSG_TYPE;
|
|
krb5_clear_error_message(context);
|
|
}
|
|
|
|
out:
|
|
krb5_free_kdc_rep(context, &rep);
|
|
if (second_ticket == &second_ticket_data)
|
|
free_Ticket(&second_ticket_data);
|
|
free_METHOD_DATA(&padata);
|
|
krb5_data_free(&resp);
|
|
krb5_data_free(&enc);
|
|
if(subkey)
|
|
krb5_free_keyblock(context, subkey);
|
|
return ret;
|
|
|
|
}
|
|
|
|
/*
|
|
* same as above, just get local addresses first if the krbtgt have
|
|
* them and the realm is not addressless
|
|
*/
|
|
|
|
static krb5_error_code
|
|
get_cred_kdc_address(krb5_context context,
|
|
krb5_ccache id,
|
|
struct krb5_fast_state *fast_state,
|
|
krb5_kdc_flags flags,
|
|
krb5_addresses *addrs,
|
|
krb5_creds *in_creds,
|
|
krb5_creds *krbtgt,
|
|
krb5_principal impersonate_principal,
|
|
Ticket *second_ticket,
|
|
const char *kdc_hostname,
|
|
const char *sitename,
|
|
krb5_creds *out_creds)
|
|
{
|
|
krb5_error_code ret;
|
|
krb5_addresses addresses = { 0, NULL };
|
|
|
|
/*
|
|
* Inherit the address-ness of the krbtgt if the address is not
|
|
* specified.
|
|
*/
|
|
|
|
if (addrs == NULL && krbtgt->addresses.len != 0) {
|
|
krb5_boolean noaddr;
|
|
|
|
krb5_appdefault_boolean(context, NULL, krbtgt->server->realm,
|
|
"no-addresses", FALSE, &noaddr);
|
|
|
|
if (!noaddr) {
|
|
ret = krb5_get_all_client_addrs(context, &addresses);
|
|
if (ret)
|
|
return ret;
|
|
/* XXX this sucks. */
|
|
addrs = &addresses;
|
|
if(addresses.len == 0)
|
|
addrs = NULL;
|
|
}
|
|
}
|
|
ret = get_cred_kdc(context, id, fast_state, flags, addrs,
|
|
in_creds, krbtgt, impersonate_principal,
|
|
second_ticket, kdc_hostname, sitename, out_creds);
|
|
krb5_free_addresses(context, &addresses);
|
|
return ret;
|
|
}
|
|
|
|
KRB5_LIB_FUNCTION krb5_error_code KRB5_LIB_CALL
|
|
krb5_get_kdc_cred(krb5_context context,
|
|
krb5_ccache id,
|
|
krb5_kdc_flags flags,
|
|
krb5_addresses *addresses,
|
|
Ticket *second_ticket,
|
|
krb5_creds *in_creds,
|
|
krb5_creds **out_creds
|
|
)
|
|
{
|
|
krb5_error_code ret;
|
|
krb5_creds *krbtgt;
|
|
struct krb5_fast_state fast_state;
|
|
|
|
memset(&fast_state, 0, sizeof(fast_state));
|
|
|
|
*out_creds = calloc(1, sizeof(**out_creds));
|
|
if(*out_creds == NULL)
|
|
return krb5_enomem(context);
|
|
ret = _krb5_get_krbtgt (context,
|
|
id,
|
|
in_creds->server->realm,
|
|
&krbtgt);
|
|
if(ret) {
|
|
free(*out_creds);
|
|
*out_creds = NULL;
|
|
return ret;
|
|
}
|
|
ret = get_cred_kdc(context, id, &fast_state, flags,
|
|
addresses, in_creds, krbtgt,
|
|
NULL, NULL, NULL, NULL, *out_creds);
|
|
krb5_free_creds (context, krbtgt);
|
|
_krb5_fast_free(context, &fast_state);
|
|
if(ret) {
|
|
free(*out_creds);
|
|
*out_creds = NULL;
|
|
}
|
|
return ret;
|
|
}
|
|
|
|
static int
|
|
not_found(krb5_context context, krb5_const_principal p, krb5_error_code code)
|
|
{
|
|
krb5_error_code ret;
|
|
char *str;
|
|
const char *err;
|
|
|
|
ret = krb5_unparse_name(context, p, &str);
|
|
if(ret) {
|
|
krb5_clear_error_message(context);
|
|
return code;
|
|
}
|
|
err = krb5_get_error_message(context, code);
|
|
krb5_set_error_message(context, code, N_("%s (%s)", ""), err, str);
|
|
krb5_free_error_message(context, err);
|
|
free(str);
|
|
return code;
|
|
}
|
|
|
|
static krb5_error_code
|
|
find_cred(krb5_context context,
|
|
krb5_ccache id,
|
|
krb5_principal server,
|
|
krb5_creds **tgts,
|
|
krb5_creds *out_creds)
|
|
{
|
|
krb5_error_code ret;
|
|
krb5_creds mcreds;
|
|
|
|
krb5_cc_clear_mcred(&mcreds);
|
|
mcreds.server = server;
|
|
krb5_timeofday(context, &mcreds.times.endtime);
|
|
ret = krb5_cc_retrieve_cred(context, id,
|
|
KRB5_TC_DONT_MATCH_REALM |
|
|
KRB5_TC_MATCH_TIMES,
|
|
&mcreds, out_creds);
|
|
if(ret == 0)
|
|
return 0;
|
|
while(tgts && *tgts){
|
|
if(krb5_compare_creds(context, KRB5_TC_DONT_MATCH_REALM,
|
|
&mcreds, *tgts)){
|
|
ret = krb5_copy_creds_contents(context, *tgts, out_creds);
|
|
return ret;
|
|
}
|
|
tgts++;
|
|
}
|
|
return not_found(context, server, KRB5_CC_NOTFOUND);
|
|
}
|
|
|
|
static krb5_error_code
|
|
add_cred(krb5_context context, krb5_creds const *tkt, krb5_creds ***tgts)
|
|
{
|
|
int i;
|
|
krb5_error_code ret;
|
|
krb5_creds **tmp = *tgts;
|
|
|
|
for(i = 0; tmp && tmp[i]; i++); /* XXX */
|
|
tmp = realloc(tmp, (i+2)*sizeof(*tmp));
|
|
if(tmp == NULL)
|
|
return krb5_enomem(context);
|
|
*tgts = tmp;
|
|
ret = krb5_copy_creds(context, tkt, &tmp[i]);
|
|
tmp[i+1] = NULL;
|
|
return ret;
|
|
}
|
|
|
|
static krb5_error_code
|
|
get_cred_kdc_capath_worker(krb5_context context,
|
|
krb5_kdc_flags flags,
|
|
krb5_ccache ccache,
|
|
struct krb5_fast_state *fast_state,
|
|
krb5_creds *in_creds,
|
|
krb5_const_realm try_realm,
|
|
krb5_principal impersonate_principal,
|
|
Ticket *second_ticket,
|
|
const char *kdc_hostname,
|
|
const char *sitename,
|
|
krb5_creds **out_creds,
|
|
krb5_creds ***ret_tgts)
|
|
{
|
|
krb5_error_code ret;
|
|
krb5_creds *tgt = NULL;
|
|
krb5_creds tmp_creds;
|
|
krb5_const_realm client_realm, server_realm;
|
|
int ok_as_delegate = 1;
|
|
|
|
*out_creds = calloc(1, sizeof(**out_creds));
|
|
if (*out_creds == NULL)
|
|
return krb5_enomem(context);
|
|
|
|
memset(&tmp_creds, 0, sizeof(tmp_creds));
|
|
|
|
client_realm = krb5_principal_get_realm(context, in_creds->client);
|
|
server_realm = krb5_principal_get_realm(context, in_creds->server);
|
|
ret = krb5_copy_principal(context, in_creds->client, &tmp_creds.client);
|
|
if (ret)
|
|
goto out;
|
|
|
|
ret = krb5_make_principal(context,
|
|
&tmp_creds.server,
|
|
try_realm,
|
|
KRB5_TGS_NAME,
|
|
server_realm,
|
|
NULL);
|
|
if (ret)
|
|
goto out;
|
|
|
|
{
|
|
krb5_creds tgts;
|
|
|
|
/*
|
|
* If we have krbtgt/server_realm@try_realm cached, use it and we're
|
|
* done.
|
|
*/
|
|
ret = find_cred(context, ccache, tmp_creds.server,
|
|
*ret_tgts, &tgts);
|
|
if (ret == 0) {
|
|
/* only allow implicit ok_as_delegate if the realm is the clients realm */
|
|
if (strcmp(try_realm, client_realm) != 0
|
|
|| strcmp(try_realm, server_realm) != 0) {
|
|
ok_as_delegate = tgts.flags.b.ok_as_delegate;
|
|
}
|
|
|
|
ret = get_cred_kdc_address(context, ccache, fast_state,
|
|
flags, NULL,
|
|
in_creds, &tgts,
|
|
impersonate_principal,
|
|
second_ticket,
|
|
kdc_hostname,
|
|
sitename,
|
|
*out_creds);
|
|
krb5_free_cred_contents(context, &tgts);
|
|
if (ret == 0 &&
|
|
!krb5_principal_compare(context, in_creds->server,
|
|
(*out_creds)->server)) {
|
|
ret = KRB5KDC_ERR_S_PRINCIPAL_UNKNOWN;
|
|
}
|
|
if (ret == 0 && ok_as_delegate == 0)
|
|
(*out_creds)->flags.b.ok_as_delegate = 0;
|
|
|
|
goto out;
|
|
}
|
|
}
|
|
|
|
if (krb5_realm_compare(context, in_creds->client, in_creds->server)) {
|
|
ret = not_found(context, in_creds->server, KRB5_CC_NOTFOUND);
|
|
goto out;
|
|
}
|
|
|
|
/*
|
|
* XXX This can loop forever, plus we recurse, so we can't just keep a
|
|
* count here. The count would have to get passed around by reference.
|
|
*
|
|
* The KDCs check for transit loops for us, and capath data is finite, so
|
|
* in fact we'll fall out of this loop at some point. We should do our own
|
|
* transit loop checking (like get_cred_kdc_referral()), and we should
|
|
* impose a max number of iterations altogether. But barring malicious or
|
|
* broken KDCs, this is good enough.
|
|
*/
|
|
while (1) {
|
|
heim_general_string tgt_inst;
|
|
|
|
ret = get_cred_kdc_capath(context, flags, ccache, fast_state,
|
|
&tmp_creds, NULL, NULL,
|
|
kdc_hostname, sitename,
|
|
&tgt, ret_tgts);
|
|
if (ret)
|
|
goto out;
|
|
|
|
/*
|
|
* if either of the chain or the ok_as_delegate was stripped
|
|
* by the kdc, make sure we strip it too.
|
|
*/
|
|
if (ok_as_delegate == 0 || tgt->flags.b.ok_as_delegate == 0) {
|
|
ok_as_delegate = 0;
|
|
tgt->flags.b.ok_as_delegate = 0;
|
|
}
|
|
|
|
ret = add_cred(context, tgt, ret_tgts);
|
|
if (ret)
|
|
goto out;
|
|
tgt_inst = tgt->server->name.name_string.val[1];
|
|
if (strcmp(tgt_inst, server_realm) == 0)
|
|
break;
|
|
krb5_free_principal(context, tmp_creds.server);
|
|
tmp_creds.server = NULL;
|
|
ret = krb5_make_principal(context, &tmp_creds.server,
|
|
tgt_inst, KRB5_TGS_NAME, server_realm, NULL);
|
|
if (ret)
|
|
goto out;
|
|
ret = krb5_free_creds(context, tgt);
|
|
tgt = NULL;
|
|
if (ret)
|
|
goto out;
|
|
}
|
|
|
|
ret = get_cred_kdc_address(context, ccache, fast_state, flags, NULL,
|
|
in_creds, tgt, impersonate_principal,
|
|
second_ticket, kdc_hostname, sitename, *out_creds);
|
|
if (ret == 0 &&
|
|
!krb5_principal_compare(context, in_creds->server,
|
|
(*out_creds)->server)) {
|
|
krb5_free_cred_contents(context, *out_creds);
|
|
ret = KRB5KDC_ERR_S_PRINCIPAL_UNKNOWN;
|
|
}
|
|
if (ret == 0 && ok_as_delegate == 0)
|
|
(*out_creds)->flags.b.ok_as_delegate = 0;
|
|
|
|
out:
|
|
if (ret) {
|
|
krb5_free_creds(context, *out_creds);
|
|
*out_creds = NULL;
|
|
}
|
|
if (tmp_creds.server)
|
|
krb5_free_principal(context, tmp_creds.server);
|
|
if (tmp_creds.client)
|
|
krb5_free_principal(context, tmp_creds.client);
|
|
if (tgt)
|
|
krb5_free_creds(context, tgt);
|
|
return ret;
|
|
}
|
|
|
|
/*
|
|
get_cred(server)
|
|
creds = cc_get_cred(server)
|
|
if(creds) return creds
|
|
tgt = cc_get_cred(krbtgt/server_realm@any_realm)
|
|
if(tgt)
|
|
return get_cred_tgt(server, tgt)
|
|
if(client_realm == server_realm)
|
|
return NULL
|
|
tgt = get_cred(krbtgt/server_realm@client_realm)
|
|
while(tgt_inst != server_realm)
|
|
tgt = get_cred(krbtgt/server_realm@tgt_inst)
|
|
return get_cred_tgt(server, tgt)
|
|
*/
|
|
|
|
static krb5_error_code
|
|
get_cred_kdc_capath(krb5_context context,
|
|
krb5_kdc_flags flags,
|
|
krb5_ccache ccache,
|
|
struct krb5_fast_state *fast_state,
|
|
krb5_creds *in_creds,
|
|
krb5_principal impersonate_principal,
|
|
Ticket *second_ticket,
|
|
const char *kdc_hostname,
|
|
const char *sitename,
|
|
krb5_creds **out_creds,
|
|
krb5_creds ***ret_tgts)
|
|
{
|
|
krb5_error_code ret;
|
|
krb5_const_realm client_realm, server_realm, try_realm;
|
|
|
|
client_realm = krb5_principal_get_realm(context, in_creds->client);
|
|
server_realm = krb5_principal_get_realm(context, in_creds->server);
|
|
|
|
try_realm = client_realm;
|
|
ret = get_cred_kdc_capath_worker(context, flags, ccache, fast_state,
|
|
in_creds, try_realm, impersonate_principal,
|
|
second_ticket, kdc_hostname, sitename,
|
|
out_creds, ret_tgts);
|
|
|
|
if (ret == KRB5KDC_ERR_S_PRINCIPAL_UNKNOWN) {
|
|
try_realm = krb5_config_get_string(context, NULL, "capaths",
|
|
client_realm, server_realm, NULL);
|
|
|
|
if (try_realm != NULL && strcmp(try_realm, client_realm) != 0) {
|
|
ret = get_cred_kdc_capath_worker(context, flags, ccache, fast_state,
|
|
in_creds, try_realm, impersonate_principal,
|
|
second_ticket, kdc_hostname, sitename,
|
|
out_creds, ret_tgts);
|
|
}
|
|
}
|
|
|
|
return ret;
|
|
}
|
|
|
|
static krb5_boolean skip_referrals(krb5_principal server,
|
|
krb5_kdc_flags *flags)
|
|
{
|
|
return server->name.name_string.len < 2 && !flags->b.canonicalize;
|
|
}
|
|
|
|
/*
|
|
* Get a service ticket from a KDC by chasing referrals from a start realm.
|
|
*
|
|
* All referral TGTs produced in the process are thrown away when we're done.
|
|
* We don't store them, and we don't allow other search mechanisms (capaths) to
|
|
* use referral TGTs produced here.
|
|
*/
|
|
static krb5_error_code
|
|
get_cred_kdc_referral(krb5_context context,
|
|
krb5_kdc_flags flags,
|
|
krb5_ccache ccache,
|
|
struct krb5_fast_state *fast_state,
|
|
krb5_creds *in_creds,
|
|
krb5_principal impersonate_principal,
|
|
Ticket *second_ticket,
|
|
const char *kdc_hostname,
|
|
const char *sitename,
|
|
krb5_creds **out_creds)
|
|
{
|
|
krb5_realm start_realm = NULL;
|
|
krb5_data config_start_realm;
|
|
krb5_error_code ret;
|
|
krb5_creds tgt, referral, ticket;
|
|
krb5_creds **referral_tgts = NULL; /* used for loop detection */
|
|
int loop = 0;
|
|
int ok_as_delegate = 1;
|
|
int want_tgt;
|
|
size_t i;
|
|
|
|
if (skip_referrals(in_creds->server, &flags)) {
|
|
krb5_set_error_message(context, KRB5KDC_ERR_PATH_NOT_ACCEPTED,
|
|
N_("Name too short to do referals, skipping", ""));
|
|
return KRB5KDC_ERR_PATH_NOT_ACCEPTED;
|
|
}
|
|
|
|
memset(&tgt, 0, sizeof(tgt));
|
|
memset(&ticket, 0, sizeof(ticket));
|
|
|
|
flags.b.canonicalize = 1;
|
|
|
|
*out_creds = NULL;
|
|
|
|
|
|
ret = krb5_cc_get_config(context, ccache, NULL, "start_realm", &config_start_realm);
|
|
if (ret == 0) {
|
|
start_realm = strndup(config_start_realm.data, config_start_realm.length);
|
|
krb5_data_free(&config_start_realm);
|
|
} else {
|
|
start_realm = strdup(krb5_principal_get_realm(context, in_creds->client));
|
|
}
|
|
if (start_realm == NULL)
|
|
return krb5_enomem(context);
|
|
|
|
/* find tgt for the clients base realm */
|
|
{
|
|
krb5_principal tgtname;
|
|
|
|
ret = krb5_make_principal(context, &tgtname,
|
|
start_realm,
|
|
KRB5_TGS_NAME,
|
|
start_realm,
|
|
NULL);
|
|
if (ret) {
|
|
free(start_realm);
|
|
return ret;
|
|
}
|
|
|
|
ret = find_cred(context, ccache, tgtname, NULL, &tgt);
|
|
krb5_free_principal(context, tgtname);
|
|
if (ret) {
|
|
free(start_realm);
|
|
return ret;
|
|
}
|
|
}
|
|
|
|
/*
|
|
* If the desired service principal service/host@REALM is not a TGT, start
|
|
* by asking for a ticket for service/host@START_REALM and process referrals
|
|
* from there.
|
|
*
|
|
* However, when we ask for a TGT, krbtgt/A@B, we're actually looking for a
|
|
* path to realm B, so that we can explicitly obtain a ticket for krbtgt/A
|
|
* from B, and not some other realm. Therefore, in this case our starting
|
|
* point will be krbtgt/B@START_REALM. Only once we obtain a ticket for
|
|
* krbtgt/B@some-transit, do we switch to requesting krbtgt/A@B on our
|
|
* final request.
|
|
*/
|
|
referral = *in_creds;
|
|
want_tgt = in_creds->server->realm[0] != '\0' &&
|
|
krb5_principal_is_krbtgt(context, in_creds->server);
|
|
if (!want_tgt)
|
|
ret = krb5_copy_principal(context, in_creds->server, &referral.server);
|
|
else
|
|
ret = krb5_make_principal(context, &referral.server, start_realm,
|
|
KRB5_TGS_NAME, in_creds->server->realm, NULL);
|
|
|
|
if (ret) {
|
|
krb5_free_cred_contents(context, &tgt);
|
|
free(start_realm);
|
|
return ret;
|
|
}
|
|
if (!want_tgt)
|
|
ret = krb5_principal_set_realm(context, referral.server, start_realm);
|
|
free(start_realm);
|
|
start_realm = NULL;
|
|
if (ret) {
|
|
krb5_free_cred_contents(context, &tgt);
|
|
krb5_free_principal(context, referral.server);
|
|
return ret;
|
|
}
|
|
|
|
while (loop++ < 17) {
|
|
krb5_creds **tickets;
|
|
krb5_creds mcreds;
|
|
char *referral_realm;
|
|
|
|
/* Use cache if we are not doing impersonation or contrained deleg */
|
|
if (impersonate_principal == NULL && !flags.b.cname_in_addl_tkt) {
|
|
krb5_cc_clear_mcred(&mcreds);
|
|
mcreds.server = referral.server;
|
|
krb5_timeofday(context, &mcreds.times.endtime);
|
|
ret = krb5_cc_retrieve_cred(context, ccache, KRB5_TC_MATCH_TIMES,
|
|
&mcreds, &ticket);
|
|
} else
|
|
ret = EINVAL;
|
|
|
|
if (ret) {
|
|
ret = get_cred_kdc_address(context, ccache, fast_state, flags, NULL,
|
|
&referral, &tgt, impersonate_principal,
|
|
second_ticket, kdc_hostname, sitename, &ticket);
|
|
if (ret)
|
|
goto out;
|
|
}
|
|
|
|
/*
|
|
* Did we get the right ticket?
|
|
*
|
|
* If we weren't asking for a TGT, then we don't mind if we took a realm
|
|
* change (referral.server has a referral realm, not necessarily the
|
|
* original).
|
|
*
|
|
* However, if we were looking for a TGT (which wouldn't be the start
|
|
* TGT, since that one must be in the ccache) then we actually want the
|
|
* one from the realm we wanted, since otherwise a _referral_ will
|
|
* confuse us and we will store that referral. In Heimdal we mostly
|
|
* never ask krb5_get_cred*() for TGTs, but some sites have code to ask
|
|
* for a ktbgt/REMOTE.REALM@REMOTE.REALM, and one could always use
|
|
* kgetcred(1) to get here asking for a krbtgt/C@D and we need to handle
|
|
* the case where last hop we get is krbtgt/C@B (in which case we must
|
|
* stop so we don't beat up on B for the remaining tries).
|
|
*/
|
|
if (!want_tgt &&
|
|
krb5_principal_compare(context, referral.server, ticket.server))
|
|
break;
|
|
|
|
if (!krb5_principal_is_krbtgt(context, ticket.server)) {
|
|
krb5_set_error_message(context, KRB5KRB_AP_ERR_NOT_US,
|
|
N_("Got back an non krbtgt "
|
|
"ticket referrals", ""));
|
|
ret = KRB5KRB_AP_ERR_NOT_US;
|
|
goto out;
|
|
}
|
|
|
|
referral_realm = ticket.server->name.name_string.val[1];
|
|
|
|
/* check that there are no referrals loops */
|
|
tickets = referral_tgts;
|
|
|
|
krb5_cc_clear_mcred(&mcreds);
|
|
mcreds.server = ticket.server;
|
|
|
|
while (tickets && *tickets){
|
|
if (krb5_compare_creds(context,
|
|
KRB5_TC_DONT_MATCH_REALM,
|
|
&mcreds,
|
|
*tickets)) {
|
|
krb5_set_error_message(context, KRB5_GET_IN_TKT_LOOP,
|
|
N_("Referral from %s "
|
|
"loops back to realm %s", ""),
|
|
tgt.server->realm,
|
|
referral_realm);
|
|
ret = KRB5_GET_IN_TKT_LOOP;
|
|
goto out;
|
|
}
|
|
tickets++;
|
|
}
|
|
|
|
/*
|
|
* if either of the chain or the ok_as_delegate was stripped
|
|
* by the kdc, make sure we strip it too.
|
|
*/
|
|
|
|
if (ok_as_delegate == 0 || ticket.flags.b.ok_as_delegate == 0) {
|
|
ok_as_delegate = 0;
|
|
ticket.flags.b.ok_as_delegate = 0;
|
|
}
|
|
|
|
_krb5_debug(context, 6, "get_cred_kdc_referral: got referral "
|
|
"to %s from %s", referral_realm, referral.server->realm);
|
|
ret = add_cred(context, &ticket, &referral_tgts);
|
|
if (ret)
|
|
goto out;
|
|
|
|
/* try realm in the referral */
|
|
if (!want_tgt || strcmp(referral_realm, in_creds->server->realm) != 0)
|
|
ret = krb5_principal_set_realm(context,
|
|
referral.server,
|
|
referral_realm);
|
|
else {
|
|
/*
|
|
* Now that we have a ticket for the desired realm, we reset
|
|
* want_tgt and reinstate the desired principal so that the we can
|
|
* match it and break out of the loop.
|
|
*/
|
|
want_tgt = 0;
|
|
krb5_free_principal(context, referral.server);
|
|
referral.server = NULL;
|
|
ret = krb5_copy_principal(context, in_creds->server, &referral.server);
|
|
}
|
|
krb5_free_cred_contents(context, &tgt);
|
|
tgt = ticket;
|
|
memset(&ticket, 0, sizeof(ticket));
|
|
if (ret)
|
|
goto out;
|
|
}
|
|
|
|
ret = krb5_copy_creds(context, &ticket, out_creds);
|
|
|
|
out:
|
|
for (i = 0; referral_tgts && referral_tgts[i]; i++)
|
|
krb5_free_creds(context, referral_tgts[i]);
|
|
free(referral_tgts);
|
|
krb5_free_principal(context, referral.server);
|
|
krb5_free_cred_contents(context, &tgt);
|
|
krb5_free_cred_contents(context, &ticket);
|
|
return ret;
|
|
}
|
|
|
|
|
|
/*
|
|
* Glue function between referrals version and old client chasing
|
|
* codebase.
|
|
*/
|
|
|
|
KRB5_LIB_FUNCTION krb5_error_code KRB5_LIB_CALL
|
|
_krb5_get_cred_kdc_any(krb5_context context,
|
|
krb5_kdc_flags flags,
|
|
krb5_ccache ccache,
|
|
struct krb5_fast_state *fast_state,
|
|
krb5_creds *in_creds,
|
|
krb5_principal impersonate_principal,
|
|
Ticket *second_ticket,
|
|
krb5_creds **out_creds,
|
|
krb5_creds ***ret_tgts)
|
|
{
|
|
char *kdc_hostname = NULL;
|
|
char *sitename = NULL;
|
|
krb5_error_code ret;
|
|
krb5_deltat offset;
|
|
krb5_data data;
|
|
|
|
krb5_data_zero(&data);
|
|
|
|
/*
|
|
* If we are using LKDC, lets pull out the addresses from the
|
|
* ticket and use that.
|
|
*/
|
|
|
|
ret = krb5_cc_get_config(context, ccache, NULL, "lkdc-hostname", &data);
|
|
if (ret == 0) {
|
|
if ((kdc_hostname = strndup(data.data, data.length)) == NULL) {
|
|
ret = krb5_enomem(context);
|
|
goto out;
|
|
}
|
|
krb5_data_free(&data);
|
|
}
|
|
|
|
ret = krb5_cc_get_config(context, ccache, NULL, "sitename", &data);
|
|
if (ret == 0) {
|
|
if ((sitename = strndup(data.data, data.length)) == NULL) {
|
|
ret = krb5_enomem(context);
|
|
goto out;
|
|
}
|
|
krb5_data_free(&data);
|
|
}
|
|
|
|
ret = krb5_cc_get_kdc_offset(context, ccache, &offset);
|
|
if (ret == 0) {
|
|
context->kdc_sec_offset = offset;
|
|
context->kdc_usec_offset = 0;
|
|
}
|
|
|
|
if (strcmp(in_creds->server->realm, "") != 0) {
|
|
/*
|
|
* Non-empty realm? Try capaths first. We might have local
|
|
* policy (capaths) to honor.
|
|
*/
|
|
ret = get_cred_kdc_capath(context,
|
|
flags,
|
|
ccache,
|
|
fast_state,
|
|
in_creds,
|
|
impersonate_principal,
|
|
second_ticket,
|
|
kdc_hostname,
|
|
sitename,
|
|
out_creds,
|
|
ret_tgts);
|
|
if (ret == 0 || skip_referrals(in_creds->server, &flags))
|
|
goto out;
|
|
}
|
|
|
|
/* Otherwise try referrals */
|
|
ret = get_cred_kdc_referral(context,
|
|
flags,
|
|
ccache,
|
|
fast_state,
|
|
in_creds,
|
|
impersonate_principal,
|
|
second_ticket,
|
|
kdc_hostname,
|
|
sitename,
|
|
out_creds);
|
|
|
|
out:
|
|
krb5_data_free(&data);
|
|
free(kdc_hostname);
|
|
free(sitename);
|
|
return ret;
|
|
}
|
|
|
|
static krb5_error_code
|
|
check_cc(krb5_context context, krb5_flags options, krb5_ccache ccache,
|
|
krb5_creds *in_creds, krb5_creds *out_creds)
|
|
{
|
|
krb5_error_code ret;
|
|
krb5_timestamp now;
|
|
krb5_creds mcreds = *in_creds;
|
|
|
|
krb5_timeofday(context, &now);
|
|
|
|
if (!(options & KRB5_GC_EXPIRED_OK) &&
|
|
mcreds.times.endtime < now) {
|
|
mcreds.times.renew_till = 0;
|
|
krb5_timeofday(context, &mcreds.times.endtime);
|
|
options |= KRB5_TC_MATCH_TIMES;
|
|
}
|
|
|
|
if (mcreds.server->name.name_type == KRB5_NT_SRV_HST_NEEDS_CANON) {
|
|
/* Avoid name canonicalization in krb5_cc_retrieve_cred() */
|
|
krb5_principal_set_type(context, mcreds.server, KRB5_NT_SRV_HST);
|
|
}
|
|
|
|
if (options & KRB5_GC_ANONYMOUS) {
|
|
ret = krb5_make_principal(context,
|
|
&mcreds.client,
|
|
krb5_principal_get_realm(context, mcreds.client),
|
|
KRB5_WELLKNOWN_NAME,
|
|
KRB5_ANON_NAME,
|
|
NULL);
|
|
if (ret)
|
|
return ret;
|
|
}
|
|
|
|
ret = krb5_cc_retrieve_cred(context, ccache,
|
|
(options &
|
|
(KRB5_TC_DONT_MATCH_REALM |
|
|
KRB5_TC_MATCH_KEYTYPE |
|
|
KRB5_TC_MATCH_TIMES)),
|
|
&mcreds, out_creds);
|
|
|
|
if (options & KRB5_GC_ANONYMOUS)
|
|
krb5_free_principal(context, mcreds.client);
|
|
|
|
if (ret == 0 && out_creds->server->realm &&
|
|
out_creds->server->realm[0] == '\0') {
|
|
Ticket ticket;
|
|
|
|
/*
|
|
* We only write tickets to the ccache that have been validated, as in,
|
|
* the sname/srealm from the KDC-REP enc-part have been checked to
|
|
* match the sname/realm from the Ticket from the KDC-REP.
|
|
*
|
|
* Our caller needs the canonical realm of the service in order to be
|
|
* able to get forwarded credentials for it when destination-TGT
|
|
* forwarding is enabled.
|
|
*
|
|
* As well, gss_init_sec_context() ought to arrange for
|
|
* gss_inquire_context() to output the canonical acceptor name on the
|
|
* initiator side.
|
|
*/
|
|
ret = decode_Ticket(out_creds->ticket.data, out_creds->ticket.length,
|
|
&ticket, NULL);
|
|
if (ret == 0) {
|
|
ret = krb5_principal_set_realm(context, out_creds->server,
|
|
ticket.realm);
|
|
free_Ticket(&ticket);
|
|
} else {
|
|
krb5_free_cred_contents(context, out_creds);
|
|
}
|
|
}
|
|
return ret;
|
|
}
|
|
|
|
static void
|
|
store_cred(krb5_context context, krb5_ccache ccache,
|
|
krb5_const_principal server_princ, krb5_creds *creds)
|
|
{
|
|
if (context->no_ticket_store)
|
|
return;
|
|
if (!krb5_principal_compare(context, creds->server, server_princ) &&
|
|
!krb5_principal_is_krbtgt(context, server_princ)) {
|
|
krb5_principal tmp_princ = creds->server;
|
|
/*
|
|
* Store the cred with the pre-canon server princ first so it
|
|
* can be found quickly in the future.
|
|
*/
|
|
creds->server = (krb5_principal)server_princ;
|
|
krb5_cc_store_cred(context, ccache, creds);
|
|
creds->server = tmp_princ;
|
|
/* Then store again with the canonicalized server princ */
|
|
}
|
|
krb5_cc_store_cred(context, ccache, creds);
|
|
}
|
|
|
|
|
|
KRB5_LIB_FUNCTION krb5_error_code KRB5_LIB_CALL
|
|
krb5_get_credentials_with_flags(krb5_context context,
|
|
krb5_flags options,
|
|
krb5_kdc_flags flags,
|
|
krb5_ccache ccache,
|
|
krb5_creds *in_creds,
|
|
krb5_creds **out_creds)
|
|
{
|
|
struct krb5_fast_state fast_state;
|
|
krb5_error_code ret;
|
|
krb5_name_canon_iterator name_canon_iter = NULL;
|
|
krb5_name_canon_rule_options rule_opts;
|
|
krb5_const_principal try_princ = NULL;
|
|
krb5_principal save_princ = in_creds->server;
|
|
krb5_creds **tgts;
|
|
krb5_creds *res_creds;
|
|
int i;
|
|
|
|
memset(&fast_state, 0, sizeof(fast_state));
|
|
|
|
if (_krb5_have_debug(context, 5)) {
|
|
char *unparsed;
|
|
|
|
ret = krb5_unparse_name(context, in_creds->server, &unparsed);
|
|
if (ret) {
|
|
_krb5_debug(context, 5, "krb5_get_creds: unable to display "
|
|
"requested service principal");
|
|
} else {
|
|
_krb5_debug(context, 5, "krb5_get_creds: requesting a ticket "
|
|
"for %s", unparsed);
|
|
free(unparsed);
|
|
}
|
|
}
|
|
|
|
if (in_creds->session.keytype) {
|
|
ret = krb5_enctype_valid(context, in_creds->session.keytype);
|
|
if (ret)
|
|
return ret;
|
|
options |= KRB5_TC_MATCH_KEYTYPE;
|
|
}
|
|
|
|
*out_creds = NULL;
|
|
res_creds = calloc(1, sizeof(*res_creds));
|
|
if (res_creds == NULL)
|
|
return krb5_enomem(context);
|
|
|
|
ret = krb5_name_canon_iterator_start(context, in_creds->server,
|
|
&name_canon_iter);
|
|
if (ret)
|
|
goto out;
|
|
|
|
next_rule:
|
|
krb5_free_cred_contents(context, res_creds);
|
|
memset(res_creds, 0, sizeof (*res_creds));
|
|
ret = krb5_name_canon_iterate(context, &name_canon_iter, &try_princ,
|
|
&rule_opts);
|
|
in_creds->server = rk_UNCONST(try_princ);
|
|
if (ret)
|
|
goto out;
|
|
|
|
if (name_canon_iter == NULL) {
|
|
if (options & KRB5_GC_CACHED)
|
|
ret = KRB5_CC_NOTFOUND;
|
|
else
|
|
ret = KRB5KDC_ERR_S_PRINCIPAL_UNKNOWN;
|
|
goto out;
|
|
}
|
|
|
|
ret = check_cc(context, options, ccache, in_creds, res_creds);
|
|
if (ret == 0) {
|
|
*out_creds = res_creds;
|
|
res_creds = NULL;
|
|
goto out;
|
|
} else if(ret != KRB5_CC_END) {
|
|
goto out;
|
|
}
|
|
if (options & KRB5_GC_CACHED)
|
|
goto next_rule;
|
|
|
|
if(options & KRB5_GC_USER_USER)
|
|
flags.b.enc_tkt_in_skey = 1;
|
|
if (flags.b.enc_tkt_in_skey)
|
|
options |= KRB5_GC_NO_STORE;
|
|
|
|
tgts = NULL;
|
|
ret = _krb5_get_cred_kdc_any(context, flags, ccache, &fast_state,
|
|
in_creds, NULL, NULL, out_creds, &tgts);
|
|
for (i = 0; tgts && tgts[i]; i++) {
|
|
if ((options & KRB5_GC_NO_STORE) == 0)
|
|
krb5_cc_store_cred(context, ccache, tgts[i]);
|
|
krb5_free_creds(context, tgts[i]);
|
|
}
|
|
free(tgts);
|
|
|
|
/* We don't yet have TGS w/ FAST, so we can't protect KBR-ERRORs */
|
|
if (ret == KRB5KDC_ERR_S_PRINCIPAL_UNKNOWN &&
|
|
!(rule_opts & KRB5_NCRO_USE_FAST))
|
|
goto next_rule;
|
|
|
|
if(ret == 0 && (options & KRB5_GC_NO_STORE) == 0)
|
|
store_cred(context, ccache, in_creds->server, *out_creds);
|
|
|
|
if (ret == 0 && _krb5_have_debug(context, 5)) {
|
|
char *unparsed;
|
|
|
|
ret = krb5_unparse_name(context, (*out_creds)->server, &unparsed);
|
|
if (ret) {
|
|
_krb5_debug(context, 5, "krb5_get_creds: unable to display "
|
|
"service principal");
|
|
} else {
|
|
_krb5_debug(context, 5, "krb5_get_creds: got a ticket for %s",
|
|
unparsed);
|
|
free(unparsed);
|
|
}
|
|
}
|
|
|
|
out:
|
|
in_creds->server = save_princ;
|
|
krb5_free_creds(context, res_creds);
|
|
krb5_free_name_canon_iterator(context, name_canon_iter);
|
|
_krb5_fast_free(context, &fast_state);
|
|
if (ret)
|
|
return not_found(context, in_creds->server, ret);
|
|
return 0;
|
|
}
|
|
|
|
KRB5_LIB_FUNCTION krb5_error_code KRB5_LIB_CALL
|
|
krb5_get_credentials(krb5_context context,
|
|
krb5_flags options,
|
|
krb5_ccache ccache,
|
|
krb5_creds *in_creds,
|
|
krb5_creds **out_creds)
|
|
{
|
|
krb5_kdc_flags flags;
|
|
flags.i = 0;
|
|
return krb5_get_credentials_with_flags(context, options, flags,
|
|
ccache, in_creds, out_creds);
|
|
}
|
|
|
|
struct krb5_get_creds_opt_data {
|
|
krb5_principal self;
|
|
krb5_flags options;
|
|
krb5_enctype enctype;
|
|
Ticket *ticket;
|
|
};
|
|
|
|
|
|
KRB5_LIB_FUNCTION krb5_error_code KRB5_LIB_CALL
|
|
krb5_get_creds_opt_alloc(krb5_context context, krb5_get_creds_opt *opt)
|
|
{
|
|
*opt = calloc(1, sizeof(**opt));
|
|
if (*opt == NULL)
|
|
return krb5_enomem(context);
|
|
return 0;
|
|
}
|
|
|
|
KRB5_LIB_FUNCTION void KRB5_LIB_CALL
|
|
krb5_get_creds_opt_free(krb5_context context, krb5_get_creds_opt opt)
|
|
{
|
|
if (opt->self)
|
|
krb5_free_principal(context, opt->self);
|
|
if (opt->ticket) {
|
|
free_Ticket(opt->ticket);
|
|
free(opt->ticket);
|
|
}
|
|
memset(opt, 0, sizeof(*opt));
|
|
free(opt);
|
|
}
|
|
|
|
KRB5_LIB_FUNCTION void KRB5_LIB_CALL
|
|
krb5_get_creds_opt_set_options(krb5_context context,
|
|
krb5_get_creds_opt opt,
|
|
krb5_flags options)
|
|
{
|
|
opt->options = options;
|
|
}
|
|
|
|
KRB5_LIB_FUNCTION void KRB5_LIB_CALL
|
|
krb5_get_creds_opt_add_options(krb5_context context,
|
|
krb5_get_creds_opt opt,
|
|
krb5_flags options)
|
|
{
|
|
opt->options |= options;
|
|
}
|
|
|
|
KRB5_LIB_FUNCTION void KRB5_LIB_CALL
|
|
krb5_get_creds_opt_set_enctype(krb5_context context,
|
|
krb5_get_creds_opt opt,
|
|
krb5_enctype enctype)
|
|
{
|
|
opt->enctype = enctype;
|
|
}
|
|
|
|
KRB5_LIB_FUNCTION krb5_error_code KRB5_LIB_CALL
|
|
krb5_get_creds_opt_set_impersonate(krb5_context context,
|
|
krb5_get_creds_opt opt,
|
|
krb5_const_principal self)
|
|
{
|
|
if (opt->self)
|
|
krb5_free_principal(context, opt->self);
|
|
return krb5_copy_principal(context, self, &opt->self);
|
|
}
|
|
|
|
KRB5_LIB_FUNCTION krb5_error_code KRB5_LIB_CALL
|
|
krb5_get_creds_opt_set_ticket(krb5_context context,
|
|
krb5_get_creds_opt opt,
|
|
const Ticket *ticket)
|
|
{
|
|
if (opt->ticket) {
|
|
free_Ticket(opt->ticket);
|
|
free(opt->ticket);
|
|
opt->ticket = NULL;
|
|
}
|
|
if (ticket) {
|
|
krb5_error_code ret;
|
|
|
|
opt->ticket = malloc(sizeof(*ticket));
|
|
if (opt->ticket == NULL)
|
|
return krb5_enomem(context);
|
|
ret = copy_Ticket(ticket, opt->ticket);
|
|
if (ret) {
|
|
free(opt->ticket);
|
|
opt->ticket = NULL;
|
|
krb5_set_error_message(context, ret,
|
|
N_("malloc: out of memory", ""));
|
|
return ret;
|
|
}
|
|
}
|
|
return 0;
|
|
}
|
|
|
|
|
|
KRB5_LIB_FUNCTION krb5_error_code KRB5_LIB_CALL
|
|
krb5_get_creds(krb5_context context,
|
|
krb5_get_creds_opt opt,
|
|
krb5_ccache ccache,
|
|
krb5_const_principal inprinc,
|
|
krb5_creds **out_creds)
|
|
{
|
|
struct krb5_fast_state fast_state;
|
|
krb5_kdc_flags flags;
|
|
krb5_flags options;
|
|
krb5_creds in_creds;
|
|
krb5_error_code ret;
|
|
krb5_creds **tgts;
|
|
krb5_creds *res_creds;
|
|
krb5_const_principal try_princ = NULL;
|
|
krb5_name_canon_iterator name_canon_iter = NULL;
|
|
krb5_name_canon_rule_options rule_opts;
|
|
int i;
|
|
int type;
|
|
const char *comp;
|
|
|
|
memset(&fast_state, 0, sizeof(fast_state));
|
|
memset(&in_creds, 0, sizeof(in_creds));
|
|
in_creds.server = rk_UNCONST(inprinc);
|
|
|
|
if (_krb5_have_debug(context, 5)) {
|
|
char *unparsed;
|
|
|
|
ret = krb5_unparse_name(context, in_creds.server, &unparsed);
|
|
if (ret) {
|
|
_krb5_debug(context, 5, "krb5_get_creds: unable to display "
|
|
"requested service principal");
|
|
} else {
|
|
_krb5_debug(context, 5, "krb5_get_creds: requesting a ticket "
|
|
"for %s", unparsed);
|
|
free(unparsed);
|
|
}
|
|
}
|
|
|
|
if (opt && opt->enctype) {
|
|
ret = krb5_enctype_valid(context, opt->enctype);
|
|
if (ret)
|
|
return ret;
|
|
}
|
|
|
|
ret = krb5_cc_get_principal(context, ccache, &in_creds.client);
|
|
if (ret)
|
|
return ret;
|
|
|
|
if (opt)
|
|
options = opt->options;
|
|
else
|
|
options = 0;
|
|
flags.i = 0;
|
|
|
|
*out_creds = NULL;
|
|
res_creds = calloc(1, sizeof(*res_creds));
|
|
if (res_creds == NULL) {
|
|
krb5_free_principal(context, in_creds.client);
|
|
return krb5_enomem(context);
|
|
}
|
|
|
|
if (opt && opt->enctype) {
|
|
in_creds.session.keytype = opt->enctype;
|
|
options |= KRB5_TC_MATCH_KEYTYPE;
|
|
}
|
|
|
|
ret = krb5_name_canon_iterator_start(context, in_creds.server,
|
|
&name_canon_iter);
|
|
if (ret)
|
|
goto out;
|
|
|
|
next_rule:
|
|
ret = krb5_name_canon_iterate(context, &name_canon_iter, &try_princ,
|
|
&rule_opts);
|
|
in_creds.server = rk_UNCONST(try_princ);
|
|
if (ret)
|
|
goto out;
|
|
|
|
if (name_canon_iter == NULL) {
|
|
if (options & KRB5_GC_CACHED)
|
|
ret = KRB5_CC_NOTFOUND;
|
|
else
|
|
ret = KRB5KDC_ERR_S_PRINCIPAL_UNKNOWN;
|
|
goto out;
|
|
}
|
|
|
|
if ((options & KRB5_GC_CONSTRAINED_DELEGATION) == 0) {
|
|
ret = check_cc(context, options, ccache, &in_creds, res_creds);
|
|
if (ret == 0) {
|
|
*out_creds = res_creds;
|
|
res_creds = NULL;
|
|
goto out;
|
|
} else if (ret != KRB5_CC_END) {
|
|
goto out;
|
|
}
|
|
}
|
|
if (options & KRB5_GC_CACHED)
|
|
goto next_rule;
|
|
|
|
type = krb5_principal_get_type(context, try_princ);
|
|
comp = krb5_principal_get_comp_string(context, try_princ, 0);
|
|
if ((type == KRB5_NT_SRV_HST || type == KRB5_NT_UNKNOWN) &&
|
|
comp != NULL && strcmp(comp, "host") == 0)
|
|
flags.b.canonicalize = 1;
|
|
if (rule_opts & KRB5_NCRO_NO_REFERRALS)
|
|
flags.b.canonicalize = 0;
|
|
else
|
|
flags.b.canonicalize = (options & KRB5_GC_CANONICALIZE) ? 1 : 0;
|
|
if (options & KRB5_GC_USER_USER) {
|
|
flags.b.enc_tkt_in_skey = 1;
|
|
options |= KRB5_GC_NO_STORE;
|
|
}
|
|
if (options & KRB5_GC_FORWARDABLE)
|
|
flags.b.forwardable = 1;
|
|
if (options & KRB5_GC_NO_TRANSIT_CHECK)
|
|
flags.b.disable_transited_check = 1;
|
|
if (options & KRB5_GC_CONSTRAINED_DELEGATION)
|
|
flags.b.cname_in_addl_tkt = 1;
|
|
if (options & KRB5_GC_ANONYMOUS)
|
|
flags.b.request_anonymous = 1;
|
|
|
|
tgts = NULL;
|
|
ret = _krb5_get_cred_kdc_any(context, flags, ccache, &fast_state,
|
|
&in_creds, opt ? opt->self : 0,
|
|
opt ? opt->ticket : 0, out_creds,
|
|
&tgts);
|
|
for (i = 0; tgts && tgts[i]; i++) {
|
|
if ((options & KRB5_GC_NO_STORE) == 0)
|
|
krb5_cc_store_cred(context, ccache, tgts[i]);
|
|
krb5_free_creds(context, tgts[i]);
|
|
}
|
|
free(tgts);
|
|
|
|
/* We don't yet have TGS w/ FAST, so we can't protect KBR-ERRORs */
|
|
if (ret == KRB5KDC_ERR_S_PRINCIPAL_UNKNOWN &&
|
|
!(rule_opts & KRB5_NCRO_USE_FAST))
|
|
goto next_rule;
|
|
|
|
if (ret == 0 && (options & KRB5_GC_NO_STORE) == 0)
|
|
store_cred(context, ccache, inprinc, *out_creds);
|
|
|
|
if (ret == 0 && _krb5_have_debug(context, 5)) {
|
|
char *unparsed;
|
|
|
|
ret = krb5_unparse_name(context, (*out_creds)->server, &unparsed);
|
|
if (ret) {
|
|
_krb5_debug(context, 5, "krb5_get_creds: unable to display "
|
|
"service principal");
|
|
} else {
|
|
_krb5_debug(context, 5, "krb5_get_creds: got a ticket for %s",
|
|
unparsed);
|
|
free(unparsed);
|
|
}
|
|
}
|
|
|
|
out:
|
|
_krb5_fast_free(context, &fast_state);
|
|
krb5_free_creds(context, res_creds);
|
|
krb5_free_principal(context, in_creds.client);
|
|
krb5_free_name_canon_iterator(context, name_canon_iter);
|
|
if (ret)
|
|
return not_found(context, inprinc, ret);
|
|
return ret;
|
|
}
|
|
|
|
/*
|
|
*
|
|
*/
|
|
|
|
KRB5_LIB_FUNCTION krb5_error_code KRB5_LIB_CALL
|
|
krb5_get_renewed_creds(krb5_context context,
|
|
krb5_creds *creds,
|
|
krb5_const_principal client,
|
|
krb5_ccache ccache,
|
|
const char *in_tkt_service)
|
|
{
|
|
krb5_error_code ret;
|
|
krb5_kdc_flags flags;
|
|
krb5_creds in, *template, *out = NULL;
|
|
|
|
memset(&in, 0, sizeof(in));
|
|
memset(creds, 0, sizeof(*creds));
|
|
|
|
ret = krb5_copy_principal(context, client, &in.client);
|
|
if (ret)
|
|
return ret;
|
|
|
|
if (in_tkt_service) {
|
|
ret = krb5_parse_name(context, in_tkt_service, &in.server);
|
|
if (ret) {
|
|
krb5_free_principal(context, in.client);
|
|
return ret;
|
|
}
|
|
} else {
|
|
const char *realm = krb5_principal_get_realm(context, client);
|
|
|
|
ret = krb5_make_principal(context, &in.server, realm, KRB5_TGS_NAME,
|
|
realm, NULL);
|
|
if (ret) {
|
|
krb5_free_principal(context, in.client);
|
|
return ret;
|
|
}
|
|
}
|
|
|
|
flags.i = 0;
|
|
flags.b.renewable = flags.b.renew = 1;
|
|
|
|
/*
|
|
* Get template from old credential cache for the same entry, if
|
|
* this failes, no worries.
|
|
*/
|
|
ret = krb5_get_credentials(context, KRB5_GC_CACHED, ccache, &in, &template);
|
|
if (ret == 0) {
|
|
flags.b.forwardable = template->flags.b.forwardable;
|
|
flags.b.proxiable = template->flags.b.proxiable;
|
|
krb5_free_creds (context, template);
|
|
}
|
|
|
|
ret = krb5_get_kdc_cred(context, ccache, flags, NULL, NULL, &in, &out);
|
|
krb5_free_principal(context, in.client);
|
|
krb5_free_principal(context, in.server);
|
|
if (ret)
|
|
return ret;
|
|
|
|
ret = krb5_copy_creds_contents(context, out, creds);
|
|
krb5_free_creds(context, out);
|
|
|
|
return ret;
|
|
}
|