If krb5_make_principal fails, tmp_creds.server may remain a pointer to freed memory and then be double-freed. After freeing it the first time, initialize it to NULL, which causes subsequent krb5_free_principal calls to do the right thing. Reported by: Coverity CID: 1273430 Sponsored by: EMC / Isilon Storage Division
1508 lines
38 KiB
C
1508 lines
38 KiB
C
/*
|
|
* Copyright (c) 1997 - 2008 Kungliga Tekniska Högskolan
|
|
* (Royal Institute of Technology, Stockholm, Sweden).
|
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* All rights reserved.
|
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*
|
|
* Portions Copyright (c) 2009 Apple Inc. All rights reserved.
|
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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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*
|
|
* 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
|
|
* documentation and/or other materials provided with the distribution.
|
|
*
|
|
* 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
|
|
* without specific prior written permission.
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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
|
|
* 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)
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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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*/
|
|
|
|
#include "krb5_locl.h"
|
|
#include <assert.h>
|
|
|
|
static krb5_error_code
|
|
get_cred_kdc_capath(krb5_context, krb5_kdc_flags,
|
|
krb5_ccache, krb5_creds *, krb5_principal,
|
|
Ticket *, 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,
|
|
PA_DATA *padata,
|
|
krb5_creds *creds)
|
|
{
|
|
u_char *buf;
|
|
size_t buf_size;
|
|
size_t len = 0;
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|
krb5_data in_data;
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|
krb5_error_code ret;
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|
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|
ASN1_MALLOC_ENCODE(KDC_REQ_BODY, buf, buf_size, body, &len, ret);
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|
if (ret)
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|
goto out;
|
|
if(buf_size != len)
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|
krb5_abortx(context, "internal error in ASN.1 encoder");
|
|
|
|
in_data.length = len;
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|
in_data.data = buf;
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|
ret = _krb5_mk_req_internal(context, &ac, 0, &in_data, creds,
|
|
&padata->padata_value,
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KRB5_KU_TGS_REQ_AUTH_CKSUM,
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|
KRB5_KU_TGS_REQ_AUTH);
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|
out:
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free (buf);
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|
if(ret)
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|
return ret;
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padata->padata_type = KRB5_PADATA_TGS_REQ;
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|
return 0;
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|
}
|
|
|
|
/*
|
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* Set the `enc-authorization-data' in `req_body' based on `authdata'
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|
*/
|
|
|
|
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);
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|
krb5_set_error_message(context, ENOMEM,
|
|
N_("malloc: out of memory", ""));
|
|
return ENOMEM;
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|
}
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|
ret = krb5_crypto_init(context, subkey, 0, &crypto);
|
|
if (ret) {
|
|
free (buf);
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|
free (req_body->enc_authorization_data);
|
|
req_body->enc_authorization_data = NULL;
|
|
return ret;
|
|
}
|
|
krb5_encrypt_EncryptedData(context,
|
|
crypto,
|
|
KRB5_KU_TGS_REQ_AUTH_DAT_SUBKEY,
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|
buf,
|
|
len,
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|
0,
|
|
req_body->enc_authorization_data);
|
|
free (buf);
|
|
krb5_crypto_destroy(context, crypto);
|
|
} else {
|
|
req_body->enc_authorization_data = NULL;
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|
}
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|
return 0;
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|
}
|
|
|
|
/*
|
|
* 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,
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|
krb5_addresses *addresses,
|
|
krb5_kdc_flags flags,
|
|
Ticket *second_ticket,
|
|
krb5_creds *in_creds,
|
|
krb5_creds *krbtgt,
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|
unsigned nonce,
|
|
const METHOD_DATA *padata,
|
|
krb5_keyblock **subkey,
|
|
TGS_REQ *t)
|
|
{
|
|
krb5_auth_context ac = NULL;
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|
krb5_error_code ret = 0;
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|
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|
memset(t, 0, sizeof(*t));
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t->pvno = 5;
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t->msg_type = krb_tgs_req;
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if (in_creds->session.keytype) {
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ALLOC_SEQ(&t->req_body.etype, 1);
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|
if(t->req_body.etype.val == NULL) {
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|
ret = ENOMEM;
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|
krb5_set_error_message(context, ret,
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|
N_("malloc: out of memory", ""));
|
|
goto fail;
|
|
}
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|
t->req_body.etype.val[0] = in_creds->session.keytype;
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|
} else {
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|
ret = _krb5_init_etype(context,
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|
KRB5_PDU_TGS_REQUEST,
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|
&t->req_body.etype.len,
|
|
&t->req_body.etype.val,
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|
NULL);
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|
}
|
|
if (ret)
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|
goto fail;
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|
t->req_body.addresses = addresses;
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|
t->req_body.kdc_options = flags.b;
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|
ret = copy_Realm(&in_creds->server->realm, &t->req_body.realm);
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|
if (ret)
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|
goto fail;
|
|
ALLOC(t->req_body.sname, 1);
|
|
if (t->req_body.sname == NULL) {
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|
ret = ENOMEM;
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|
krb5_set_error_message(context, ret, N_("malloc: out of memory", ""));
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|
goto fail;
|
|
}
|
|
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|
/* some versions of some code might require that the client be
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|
present in TGS-REQs, but this is clearly against the spec */
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|
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|
ret = copy_PrincipalName(&in_creds->server->name, t->req_body.sname);
|
|
if (ret)
|
|
goto fail;
|
|
|
|
/* 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);
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|
if(t->req_body.till == NULL){
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|
ret = ENOMEM;
|
|
krb5_set_error_message(context, ret, N_("malloc: out of memory", ""));
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|
goto fail;
|
|
}
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|
*t->req_body.till = in_creds->times.endtime;
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|
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|
t->req_body.nonce = nonce;
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if(second_ticket){
|
|
ALLOC(t->req_body.additional_tickets, 1);
|
|
if (t->req_body.additional_tickets == NULL) {
|
|
ret = ENOMEM;
|
|
krb5_set_error_message(context, ret,
|
|
N_("malloc: out of memory", ""));
|
|
goto fail;
|
|
}
|
|
ALLOC_SEQ(t->req_body.additional_tickets, 1);
|
|
if (t->req_body.additional_tickets->val == NULL) {
|
|
ret = ENOMEM;
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|
krb5_set_error_message(context, ret,
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|
N_("malloc: out of memory", ""));
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|
goto fail;
|
|
}
|
|
ret = copy_Ticket(second_ticket, t->req_body.additional_tickets->val);
|
|
if (ret)
|
|
goto fail;
|
|
}
|
|
ALLOC(t->padata, 1);
|
|
if (t->padata == NULL) {
|
|
ret = ENOMEM;
|
|
krb5_set_error_message(context, ret, N_("malloc: out of memory", ""));
|
|
goto fail;
|
|
}
|
|
ALLOC_SEQ(t->padata, 1 + padata->len);
|
|
if (t->padata->val == NULL) {
|
|
ret = ENOMEM;
|
|
krb5_set_error_message(context, ret, N_("malloc: out of memory", ""));
|
|
goto fail;
|
|
}
|
|
{
|
|
size_t i;
|
|
for (i = 0; i < padata->len; i++) {
|
|
ret = copy_PA_DATA(&padata->val[i], &t->padata->val[i + 1]);
|
|
if (ret) {
|
|
krb5_set_error_message(context, ret,
|
|
N_("malloc: out of memory", ""));
|
|
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;
|
|
|
|
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,
|
|
&t->padata->val[0],
|
|
krbtgt);
|
|
if(ret)
|
|
goto fail;
|
|
|
|
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);
|
|
}
|
|
return ret;
|
|
}
|
|
|
|
krb5_error_code
|
|
_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;
|
|
|
|
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;
|
|
}
|
|
ret = krb5_get_credentials(context,
|
|
KRB5_GC_CACHED,
|
|
id,
|
|
&tmp_cred,
|
|
cred);
|
|
krb5_free_principal(context, tmp_cred.client);
|
|
krb5_free_principal(context, tmp_cred.server);
|
|
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)
|
|
{
|
|
const krb5_keyblock *subkey = skey;
|
|
krb5_error_code ret = 0;
|
|
krb5_data data;
|
|
size_t size;
|
|
krb5_crypto crypto;
|
|
|
|
assert(usage == 0);
|
|
|
|
krb5_data_zero(&data);
|
|
|
|
/*
|
|
* start out with trying with subkey if we have one
|
|
*/
|
|
if (subkey) {
|
|
ret = krb5_crypto_init(context, subkey, 0, &crypto);
|
|
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 && 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 (subkey == NULL || 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,
|
|
krb5_kdc_flags flags,
|
|
krb5_addresses *addresses,
|
|
krb5_creds *in_creds,
|
|
krb5_creds *krbtgt,
|
|
krb5_principal impersonate_principal,
|
|
Ticket *second_ticket,
|
|
krb5_creds *out_creds)
|
|
{
|
|
TGS_REQ req;
|
|
krb5_data enc;
|
|
krb5_data resp;
|
|
krb5_kdc_rep rep;
|
|
KRB_ERROR error;
|
|
krb5_error_code ret;
|
|
unsigned nonce;
|
|
krb5_keyblock *subkey = NULL;
|
|
size_t len = 0;
|
|
Ticket second_ticket_data;
|
|
METHOD_DATA padata;
|
|
|
|
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,
|
|
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);
|
|
|
|
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;
|
|
|
|
memset(&rep, 0, sizeof(rep));
|
|
if(decode_TGS_REP(resp.data, resp.length, &rep.kdc_rep, &len) == 0) {
|
|
unsigned eflags = 0;
|
|
|
|
ret = krb5_copy_principal(context,
|
|
in_creds->client,
|
|
&out_creds->client);
|
|
if(ret)
|
|
goto out2;
|
|
ret = krb5_copy_principal(context,
|
|
in_creds->server,
|
|
&out_creds->server);
|
|
if(ret)
|
|
goto out2;
|
|
/* this should go someplace else */
|
|
out_creds->times.endtime = in_creds->times.endtime;
|
|
|
|
/* XXX should do better testing */
|
|
if (flags.b.constrained_delegation || impersonate_principal)
|
|
eflags |= EXTRACT_TICKET_ALLOW_CNAME_MISMATCH;
|
|
|
|
ret = _krb5_extract_ticket(context,
|
|
&rep,
|
|
out_creds,
|
|
&krbtgt->session,
|
|
NULL,
|
|
0,
|
|
&krbtgt->addresses,
|
|
nonce,
|
|
eflags,
|
|
decrypt_tkt_with_subkey,
|
|
subkey);
|
|
out2:
|
|
krb5_free_kdc_rep(context, &rep);
|
|
} else if(krb5_rd_error(context, &resp, &error) == 0) {
|
|
ret = krb5_error_from_rd_error(context, &error, in_creds);
|
|
krb5_free_error_contents(context, &error);
|
|
} 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:
|
|
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,
|
|
krb5_kdc_flags flags,
|
|
krb5_addresses *addrs,
|
|
krb5_creds *in_creds,
|
|
krb5_creds *krbtgt,
|
|
krb5_principal impersonate_principal,
|
|
Ticket *second_ticket,
|
|
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) {
|
|
krb5_get_all_client_addrs(context, &addresses);
|
|
/* XXX this sucks. */
|
|
addrs = &addresses;
|
|
if(addresses.len == 0)
|
|
addrs = NULL;
|
|
}
|
|
}
|
|
ret = get_cred_kdc(context, id, flags, addrs, in_creds,
|
|
krbtgt, impersonate_principal,
|
|
second_ticket, 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;
|
|
|
|
*out_creds = calloc(1, sizeof(**out_creds));
|
|
if(*out_creds == NULL) {
|
|
krb5_set_error_message(context, ENOMEM,
|
|
N_("malloc: out of memory", ""));
|
|
return ENOMEM;
|
|
}
|
|
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, flags, addresses,
|
|
in_creds, krbtgt, NULL, NULL, *out_creds);
|
|
krb5_free_creds (context, krbtgt);
|
|
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;
|
|
|
|
ret = krb5_unparse_name(context, p, &str);
|
|
if(ret) {
|
|
krb5_clear_error_message(context);
|
|
return code;
|
|
}
|
|
krb5_set_error_message(context, code,
|
|
N_("Matching credential (%s) not found", ""), str);
|
|
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;
|
|
ret = krb5_cc_retrieve_cred(context, id, KRB5_TC_DONT_MATCH_REALM,
|
|
&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) {
|
|
krb5_set_error_message(context, ENOMEM,
|
|
N_("malloc: out of memory", ""));
|
|
return ENOMEM;
|
|
}
|
|
*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,
|
|
krb5_creds *in_creds,
|
|
krb5_const_realm try_realm,
|
|
krb5_principal impersonate_principal,
|
|
Ticket *second_ticket,
|
|
krb5_creds **out_creds,
|
|
krb5_creds ***ret_tgts)
|
|
{
|
|
krb5_error_code ret;
|
|
krb5_creds *tgt, tmp_creds;
|
|
krb5_const_realm client_realm, server_realm;
|
|
int ok_as_delegate = 1;
|
|
|
|
*out_creds = NULL;
|
|
|
|
client_realm = krb5_principal_get_realm(context, in_creds->client);
|
|
server_realm = krb5_principal_get_realm(context, in_creds->server);
|
|
memset(&tmp_creds, 0, sizeof(tmp_creds));
|
|
ret = krb5_copy_principal(context, in_creds->client, &tmp_creds.client);
|
|
if(ret)
|
|
return ret;
|
|
|
|
ret = krb5_make_principal(context,
|
|
&tmp_creds.server,
|
|
try_realm,
|
|
KRB5_TGS_NAME,
|
|
server_realm,
|
|
NULL);
|
|
if(ret){
|
|
krb5_free_principal(context, tmp_creds.client);
|
|
return ret;
|
|
}
|
|
{
|
|
krb5_creds tgts;
|
|
|
|
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;
|
|
|
|
*out_creds = calloc(1, sizeof(**out_creds));
|
|
if(*out_creds == NULL) {
|
|
ret = ENOMEM;
|
|
krb5_set_error_message(context, ret,
|
|
N_("malloc: out of memory", ""));
|
|
} else {
|
|
ret = get_cred_kdc_address(context, ccache, flags, NULL,
|
|
in_creds, &tgts,
|
|
impersonate_principal,
|
|
second_ticket,
|
|
*out_creds);
|
|
if (ret) {
|
|
free (*out_creds);
|
|
*out_creds = NULL;
|
|
} else if (ok_as_delegate == 0)
|
|
(*out_creds)->flags.b.ok_as_delegate = 0;
|
|
}
|
|
krb5_free_cred_contents(context, &tgts);
|
|
krb5_free_principal(context, tmp_creds.server);
|
|
krb5_free_principal(context, tmp_creds.client);
|
|
return ret;
|
|
}
|
|
}
|
|
if(krb5_realm_compare(context, in_creds->client, in_creds->server))
|
|
return not_found(context, in_creds->server, KRB5_CC_NOTFOUND);
|
|
|
|
/* XXX this can loop forever */
|
|
while(1){
|
|
heim_general_string tgt_inst;
|
|
|
|
ret = get_cred_kdc_capath(context, flags, ccache, &tmp_creds,
|
|
NULL, NULL, &tgt, ret_tgts);
|
|
if(ret) {
|
|
krb5_free_principal(context, tmp_creds.server);
|
|
krb5_free_principal(context, tmp_creds.client);
|
|
return ret;
|
|
}
|
|
/*
|
|
* 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) {
|
|
krb5_free_principal(context, tmp_creds.server);
|
|
krb5_free_principal(context, tmp_creds.client);
|
|
return ret;
|
|
}
|
|
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) {
|
|
krb5_free_principal(context, tmp_creds.server);
|
|
krb5_free_principal(context, tmp_creds.client);
|
|
return ret;
|
|
}
|
|
ret = krb5_free_creds(context, tgt);
|
|
if(ret) {
|
|
krb5_free_principal(context, tmp_creds.server);
|
|
krb5_free_principal(context, tmp_creds.client);
|
|
return ret;
|
|
}
|
|
}
|
|
|
|
krb5_free_principal(context, tmp_creds.server);
|
|
krb5_free_principal(context, tmp_creds.client);
|
|
*out_creds = calloc(1, sizeof(**out_creds));
|
|
if(*out_creds == NULL) {
|
|
ret = ENOMEM;
|
|
krb5_set_error_message(context, ret, N_("malloc: out of memory", ""));
|
|
} else {
|
|
ret = get_cred_kdc_address (context, ccache, flags, NULL,
|
|
in_creds, tgt, impersonate_principal,
|
|
second_ticket, *out_creds);
|
|
if (ret) {
|
|
free (*out_creds);
|
|
*out_creds = NULL;
|
|
}
|
|
}
|
|
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,
|
|
krb5_creds *in_creds,
|
|
krb5_principal impersonate_principal,
|
|
Ticket *second_ticket,
|
|
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, in_creds, try_realm,
|
|
impersonate_principal, second_ticket, 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)) {
|
|
ret = get_cred_kdc_capath_worker(context, flags, ccache, in_creds,
|
|
try_realm, impersonate_principal,
|
|
second_ticket, out_creds, ret_tgts);
|
|
}
|
|
}
|
|
|
|
return ret;
|
|
}
|
|
|
|
static krb5_error_code
|
|
get_cred_kdc_referral(krb5_context context,
|
|
krb5_kdc_flags flags,
|
|
krb5_ccache ccache,
|
|
krb5_creds *in_creds,
|
|
krb5_principal impersonate_principal,
|
|
Ticket *second_ticket,
|
|
krb5_creds **out_creds,
|
|
krb5_creds ***ret_tgts)
|
|
{
|
|
krb5_const_realm client_realm;
|
|
krb5_error_code ret;
|
|
krb5_creds tgt, referral, ticket;
|
|
int loop = 0;
|
|
int ok_as_delegate = 1;
|
|
|
|
if (in_creds->server->name.name_string.len < 2 && !flags.b.canonicalize) {
|
|
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;
|
|
|
|
client_realm = krb5_principal_get_realm(context, in_creds->client);
|
|
|
|
/* find tgt for the clients base realm */
|
|
{
|
|
krb5_principal tgtname;
|
|
|
|
ret = krb5_make_principal(context, &tgtname,
|
|
client_realm,
|
|
KRB5_TGS_NAME,
|
|
client_realm,
|
|
NULL);
|
|
if(ret)
|
|
return ret;
|
|
|
|
ret = find_cred(context, ccache, tgtname, *ret_tgts, &tgt);
|
|
krb5_free_principal(context, tgtname);
|
|
if (ret)
|
|
return ret;
|
|
}
|
|
|
|
referral = *in_creds;
|
|
ret = krb5_copy_principal(context, in_creds->server, &referral.server);
|
|
if (ret) {
|
|
krb5_free_cred_contents(context, &tgt);
|
|
return ret;
|
|
}
|
|
ret = krb5_principal_set_realm(context, referral.server, client_realm);
|
|
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 contrainte deleg */
|
|
if (impersonate_principal == NULL || flags.b.constrained_delegation) {
|
|
krb5_cc_clear_mcred(&mcreds);
|
|
mcreds.server = referral.server;
|
|
ret = krb5_cc_retrieve_cred(context, ccache, 0, &mcreds, &ticket);
|
|
} else
|
|
ret = EINVAL;
|
|
|
|
if (ret) {
|
|
ret = get_cred_kdc_address(context, ccache, flags, NULL,
|
|
&referral, &tgt, impersonate_principal,
|
|
second_ticket, &ticket);
|
|
if (ret)
|
|
goto out;
|
|
}
|
|
|
|
/* Did we get the right ticket ? */
|
|
if (krb5_principal_compare_any_realm(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 = *ret_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;
|
|
}
|
|
|
|
ret = add_cred(context, &ticket, ret_tgts);
|
|
if (ret)
|
|
goto out;
|
|
|
|
/* try realm in the referral */
|
|
ret = krb5_principal_set_realm(context,
|
|
referral.server,
|
|
referral_realm);
|
|
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:
|
|
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_error_code
|
|
_krb5_get_cred_kdc_any(krb5_context context,
|
|
krb5_kdc_flags flags,
|
|
krb5_ccache ccache,
|
|
krb5_creds *in_creds,
|
|
krb5_principal impersonate_principal,
|
|
Ticket *second_ticket,
|
|
krb5_creds **out_creds,
|
|
krb5_creds ***ret_tgts)
|
|
{
|
|
krb5_error_code ret;
|
|
krb5_deltat offset;
|
|
|
|
ret = krb5_cc_get_kdc_offset(context, ccache, &offset);
|
|
if (ret) {
|
|
context->kdc_sec_offset = offset;
|
|
context->kdc_usec_offset = 0;
|
|
}
|
|
|
|
ret = get_cred_kdc_referral(context,
|
|
flags,
|
|
ccache,
|
|
in_creds,
|
|
impersonate_principal,
|
|
second_ticket,
|
|
out_creds,
|
|
ret_tgts);
|
|
if (ret == 0 || flags.b.canonicalize)
|
|
return ret;
|
|
return get_cred_kdc_capath(context,
|
|
flags,
|
|
ccache,
|
|
in_creds,
|
|
impersonate_principal,
|
|
second_ticket,
|
|
out_creds,
|
|
ret_tgts);
|
|
}
|
|
|
|
|
|
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)
|
|
{
|
|
krb5_error_code ret;
|
|
krb5_creds **tgts;
|
|
krb5_creds *res_creds;
|
|
int i;
|
|
|
|
if (in_creds->session.keytype) {
|
|
ret = krb5_enctype_valid(context, in_creds->session.keytype);
|
|
if (ret)
|
|
return ret;
|
|
}
|
|
|
|
*out_creds = NULL;
|
|
res_creds = calloc(1, sizeof(*res_creds));
|
|
if (res_creds == NULL) {
|
|
krb5_set_error_message(context, ENOMEM,
|
|
N_("malloc: out of memory", ""));
|
|
return ENOMEM;
|
|
}
|
|
|
|
if (in_creds->session.keytype)
|
|
options |= KRB5_TC_MATCH_KEYTYPE;
|
|
|
|
/*
|
|
* If we got a credential, check if credential is expired before
|
|
* returning it.
|
|
*/
|
|
ret = krb5_cc_retrieve_cred(context,
|
|
ccache,
|
|
in_creds->session.keytype ?
|
|
KRB5_TC_MATCH_KEYTYPE : 0,
|
|
in_creds, res_creds);
|
|
/*
|
|
* If we got a credential, check if credential is expired before
|
|
* returning it, but only if KRB5_GC_EXPIRED_OK is not set.
|
|
*/
|
|
if (ret == 0) {
|
|
krb5_timestamp timeret;
|
|
|
|
/* If expired ok, don't bother checking */
|
|
if(options & KRB5_GC_EXPIRED_OK) {
|
|
*out_creds = res_creds;
|
|
return 0;
|
|
}
|
|
|
|
krb5_timeofday(context, &timeret);
|
|
if(res_creds->times.endtime > timeret) {
|
|
*out_creds = res_creds;
|
|
return 0;
|
|
}
|
|
if(options & KRB5_GC_CACHED)
|
|
krb5_cc_remove_cred(context, ccache, 0, res_creds);
|
|
|
|
} else if(ret != KRB5_CC_END) {
|
|
free(res_creds);
|
|
return ret;
|
|
}
|
|
free(res_creds);
|
|
if(options & KRB5_GC_CACHED)
|
|
return not_found(context, in_creds->server, KRB5_CC_NOTFOUND);
|
|
|
|
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,
|
|
in_creds, NULL, NULL, out_creds, &tgts);
|
|
for(i = 0; tgts && tgts[i]; i++) {
|
|
krb5_cc_store_cred(context, ccache, tgts[i]);
|
|
krb5_free_creds(context, tgts[i]);
|
|
}
|
|
free(tgts);
|
|
if(ret == 0 && (options & KRB5_GC_NO_STORE) == 0)
|
|
krb5_cc_store_cred(context, ccache, *out_creds);
|
|
return ret;
|
|
}
|
|
|
|
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) {
|
|
krb5_set_error_message(context, ENOMEM,
|
|
N_("malloc: out of memory", ""));
|
|
return ENOMEM;
|
|
}
|
|
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) {
|
|
krb5_set_error_message(context, ENOMEM,
|
|
N_("malloc: out of memory", ""));
|
|
return ENOMEM;
|
|
}
|
|
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)
|
|
{
|
|
krb5_kdc_flags flags;
|
|
krb5_flags options;
|
|
krb5_creds in_creds;
|
|
krb5_error_code ret;
|
|
krb5_creds **tgts;
|
|
krb5_creds *res_creds;
|
|
int i;
|
|
|
|
if (opt && opt->enctype) {
|
|
ret = krb5_enctype_valid(context, opt->enctype);
|
|
if (ret)
|
|
return ret;
|
|
}
|
|
|
|
memset(&in_creds, 0, sizeof(in_creds));
|
|
in_creds.server = rk_UNCONST(inprinc);
|
|
|
|
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);
|
|
krb5_set_error_message(context, ENOMEM,
|
|
N_("malloc: out of memory", ""));
|
|
return ENOMEM;
|
|
}
|
|
|
|
if (opt && opt->enctype) {
|
|
in_creds.session.keytype = opt->enctype;
|
|
options |= KRB5_TC_MATCH_KEYTYPE;
|
|
}
|
|
|
|
/*
|
|
* If we got a credential, check if credential is expired before
|
|
* returning it.
|
|
*/
|
|
ret = krb5_cc_retrieve_cred(context,
|
|
ccache,
|
|
options & KRB5_TC_MATCH_KEYTYPE,
|
|
&in_creds, res_creds);
|
|
/*
|
|
* If we got a credential, check if credential is expired before
|
|
* returning it, but only if KRB5_GC_EXPIRED_OK is not set.
|
|
*/
|
|
if (ret == 0) {
|
|
krb5_timestamp timeret;
|
|
|
|
/* If expired ok, don't bother checking */
|
|
if(options & KRB5_GC_EXPIRED_OK) {
|
|
*out_creds = res_creds;
|
|
krb5_free_principal(context, in_creds.client);
|
|
goto out;
|
|
}
|
|
|
|
krb5_timeofday(context, &timeret);
|
|
if(res_creds->times.endtime > timeret) {
|
|
*out_creds = res_creds;
|
|
krb5_free_principal(context, in_creds.client);
|
|
goto out;
|
|
}
|
|
if(options & KRB5_GC_CACHED)
|
|
krb5_cc_remove_cred(context, ccache, 0, res_creds);
|
|
|
|
} else if(ret != KRB5_CC_END) {
|
|
free(res_creds);
|
|
krb5_free_principal(context, in_creds.client);
|
|
goto out;
|
|
}
|
|
free(res_creds);
|
|
if(options & KRB5_GC_CACHED) {
|
|
krb5_free_principal(context, in_creds.client);
|
|
ret = not_found(context, in_creds.server, KRB5_CC_NOTFOUND);
|
|
goto out;
|
|
}
|
|
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.request_anonymous = 1; /* XXX ARGH confusion */
|
|
flags.b.constrained_delegation = 1;
|
|
}
|
|
if (options & KRB5_GC_CANONICALIZE)
|
|
flags.b.canonicalize = 1;
|
|
|
|
tgts = NULL;
|
|
ret = _krb5_get_cred_kdc_any(context, flags, ccache,
|
|
&in_creds, opt->self, opt->ticket,
|
|
out_creds, &tgts);
|
|
krb5_free_principal(context, in_creds.client);
|
|
for(i = 0; tgts && tgts[i]; i++) {
|
|
krb5_cc_store_cred(context, ccache, tgts[i]);
|
|
krb5_free_creds(context, tgts[i]);
|
|
}
|
|
free(tgts);
|
|
if(ret == 0 && (options & KRB5_GC_NO_STORE) == 0)
|
|
krb5_cc_store_cred(context, ccache, *out_creds);
|
|
|
|
out:
|
|
_krb5_debug(context, 5, "krb5_get_creds: ret = %d", 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;
|
|
}
|