oysteikt/heimdal
0
0
Fork 0
Code Issues 5 Pull Requests Releases Activity
Files
c74d1992e1f8db43b33635d49f2f29b6885e8bb8
heimdal/kdc/fast.c
Luke Howard 0e8c4ccc6e hdb: eliminate hdb_entry_ex 
Remove hdb_entry_ex and revert to the original design of hdb_entry (except with
an additional context member in hdb_entry which is managed by the free_entry
method in HDB).
2022-01-15 18:54:57 +11:00

897 lines
23 KiB
C
Raw Blame History

/*
* Copyright (c) 1997-2011 Kungliga Tekniska Högskolan
* (Royal Institute of Technology, Stockholm, Sweden).
* All rights reserved.
*
* Portions Copyright (c) 2010 - 2011 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 "kdc_locl.h"
static krb5_error_code
salt_fastuser_crypto(astgs_request_t r,
krb5_const_principal salt_principal,
krb5_enctype enctype,
krb5_crypto fast_crypto,
krb5_crypto *salted_crypto)
{
krb5_error_code ret;
krb5_principal client_princ = NULL;
krb5_data salt;
krb5_keyblock dkey;
size_t size;
*salted_crypto = NULL;
krb5_data_zero(&salt);
krb5_keyblock_zero(&dkey);
if (salt_principal == NULL) {
if (r->req.req_body.cname == NULL) {
ret = KRB5KRB_ERR_GENERIC;
goto out;
}
ret = _krb5_principalname2krb5_principal(r->context, &client_princ,
*(r->req.req_body.cname),
r->req.req_body.realm);
if (ret)
goto out;
salt_principal = client_princ;
}
ret = krb5_unparse_name(r->context, salt_principal, (char **)&salt.data);
if (ret)
goto out;
salt.length = strlen(salt.data);
kdc_log(r->context, r->config, 10,
"salt_fastuser_crypto: salt principal is %s (%d)",
(char *)salt.data, enctype);
ret = krb5_enctype_keysize(r->context, enctype, &size);
if (ret)
goto out;
ret = krb5_crypto_prfplus(r->context, fast_crypto, &salt,
size, &dkey.keyvalue);
if (ret)
goto out;
dkey.keytype = enctype;
ret = krb5_crypto_init(r->context, &dkey, ENCTYPE_NULL, salted_crypto);
if (ret)
goto out;
out:
krb5_free_keyblock_contents(r->context, &dkey);
krb5_data_free(&salt);
krb5_free_principal(r->context, client_princ);
return ret;
}
static krb5_error_code
get_fastuser_crypto(astgs_request_t r,
krb5_const_principal ticket_client,
krb5_enctype enctype,
krb5_crypto *crypto)
{
krb5_principal fast_princ;
HDB *fast_db;
hdb_entry *fast_user = NULL;
Key *cookie_key = NULL;
krb5_crypto fast_crypto = NULL;
krb5_error_code ret;
*crypto = NULL;
ret = krb5_make_principal(r->context, &fast_princ,
KRB5_WELLKNOWN_ORG_H5L_REALM,
KRB5_WELLKNOWN_NAME, "org.h5l.fast-cookie", NULL);
if (ret)
goto out;
ret = _kdc_db_fetch(r->context, r->config, fast_princ,
HDB_F_GET_FAST_COOKIE, NULL, &fast_db, &fast_user);
if (ret)
goto out;
if (enctype == KRB5_ENCTYPE_NULL)
ret = _kdc_get_preferred_key(r->context, r->config, fast_user,
"fast-cookie", &enctype, &cookie_key);
else
ret = hdb_enctype2key(r->context, fast_user, NULL,
enctype, &cookie_key);
if (ret)
goto out;
ret = krb5_crypto_init(r->context, &cookie_key->key,
ENCTYPE_NULL, &fast_crypto);
if (ret)
goto out;
ret = salt_fastuser_crypto(r, ticket_client,
cookie_key->key.keytype,
fast_crypto, crypto);
if (ret)
goto out;
out:
if (fast_user)
_kdc_free_ent(r->context, fast_db, fast_user);
if (fast_crypto)
krb5_crypto_destroy(r->context, fast_crypto);
krb5_free_principal(r->context, fast_princ);
return ret;
}
static krb5_error_code
fast_parse_cookie(astgs_request_t r,
krb5_const_principal ticket_client,
const PA_DATA *pa)
{
krb5_crypto crypto = NULL;
krb5_error_code ret;
KDCFastCookie data;
krb5_data d1;
size_t len;
ret = decode_KDCFastCookie(pa->padata_value.data,
pa->padata_value.length,
&data, &len);
if (ret)
return ret;
if (len != pa->padata_value.length || strcmp("H5L1", data.version) != 0) {
free_KDCFastCookie(&data);
return KRB5KDC_ERR_POLICY;
}
ret = get_fastuser_crypto(r, ticket_client, data.cookie.etype, &crypto);
if (ret)
goto out;
ret = krb5_decrypt_EncryptedData(r->context, crypto,
KRB5_KU_H5L_COOKIE,
&data.cookie, &d1);
krb5_crypto_destroy(r->context, crypto);
if (ret)
goto out;
ret = decode_KDCFastState(d1.data, d1.length, &r->fast, &len);
krb5_data_free(&d1);
if (ret)
goto out;
if (r->fast.expiration < kdc_time) {
kdc_log(r->context, r->config, 2, "FAST cookie expired");
ret = KRB5KDC_ERR_POLICY;
goto out;
}
out:
free_KDCFastCookie(&data);
return ret;
}
static krb5_error_code
fast_add_cookie(astgs_request_t r,
krb5_const_principal ticket_client,
METHOD_DATA *method_data)
{
krb5_crypto crypto = NULL;
KDCFastCookie shell;
krb5_error_code ret;
krb5_data data;
size_t size;
memset(&shell, 0, sizeof(shell));
r->fast.expiration = kdc_time + FAST_EXPIRATION_TIME;
ASN1_MALLOC_ENCODE(KDCFastState, data.data, data.length,
&r->fast, &size, ret);
if (ret)
return ret;
heim_assert(size == data.length, "internal asn.1 encoder error");
ret = get_fastuser_crypto(r, ticket_client, KRB5_ENCTYPE_NULL, &crypto);
if (ret) {
kdc_log(r->context, r->config, 0,
"Failed to find FAST principal for cookie encryption: %d", ret);
goto out;
}
ret = krb5_encrypt_EncryptedData(r->context, crypto,
KRB5_KU_H5L_COOKIE,
data.data, data.length, 0,
&shell.cookie);
krb5_crypto_destroy(r->context, crypto);
if (ret)
goto out;
krb5_data_free(&data);
shell.version = "H5L1";
ASN1_MALLOC_ENCODE(KDCFastCookie, data.data, data.length,
&shell, &size, ret);
free_EncryptedData(&shell.cookie);
if (ret)
goto out;
heim_assert(size == data.length, "internal asn.1 encoder error");
ret = krb5_padata_add(r->context, method_data,
KRB5_PADATA_FX_COOKIE,
data.data, data.length);
if (ret == 0)
krb5_data_zero(&data);
out:
krb5_data_free(&data);
return ret;
}
krb5_error_code
_kdc_fast_mk_response(krb5_context context,
krb5_crypto armor_crypto,
METHOD_DATA *pa_data,
krb5_keyblock *strengthen_key,
KrbFastFinished *finished,
krb5uint32 nonce,
krb5_data *data)
{
PA_FX_FAST_REPLY fxfastrep;
KrbFastResponse fastrep;
krb5_error_code ret;
krb5_data buf;
size_t size;
memset(&fxfastrep, 0, sizeof(fxfastrep));
memset(&fastrep, 0, sizeof(fastrep));
krb5_data_zero(data);
if (pa_data) {
fastrep.padata.val = pa_data->val;
fastrep.padata.len = pa_data->len;
}
fastrep.strengthen_key = strengthen_key;
fastrep.finished = finished;
fastrep.nonce = nonce;
ASN1_MALLOC_ENCODE(KrbFastResponse, buf.data, buf.length,
&fastrep, &size, ret);
if (ret)
return ret;
heim_assert(size == buf.length, "internal asn.1 encoder error");
fxfastrep.element = choice_PA_FX_FAST_REPLY_armored_data;
ret = krb5_encrypt_EncryptedData(context,
armor_crypto,
KRB5_KU_FAST_REP,
buf.data,
buf.length,
0,
&fxfastrep.u.armored_data.enc_fast_rep);
krb5_data_free(&buf);
if (ret)
return ret;
ASN1_MALLOC_ENCODE(PA_FX_FAST_REPLY, data->data, data->length,
&fxfastrep, &size, ret);
free_PA_FX_FAST_REPLY(&fxfastrep);
if (ret)
return ret;
heim_assert(size == data->length, "internal asn.1 encoder error");
return 0;
}
krb5_error_code
_kdc_fast_mk_error(astgs_request_t r,
METHOD_DATA *error_method,
krb5_crypto armor_crypto,
const KDC_REQ_BODY *req_body,
krb5_error_code outer_error,
krb5_principal error_client,
krb5_principal error_server,
time_t *csec, int *cusec,
krb5_data *error_msg)
{
krb5_error_code ret;
krb5_data e_data;
size_t size;
krb5_data_zero(&e_data);
heim_assert(r != NULL, "invalid request in _kdc_fast_mk_error");
/*
* FX-COOKIE can be used outside of FAST, e.g. SRP or GSS.
*/
if (armor_crypto || r->fast.fast_state.len) {
kdc_log(r->context, r->config, 5, "Adding FAST cookie for KRB-ERROR");
ret = fast_add_cookie(r, error_client, error_method);
if (ret) {
kdc_log(r->context, r->config, 1,
"Failed to add FAST cookie: %d", ret);
free_METHOD_DATA(error_method);
return ret;
}
}
if (armor_crypto) {
PA_FX_FAST_REPLY fxfastrep;
KrbFastResponse fastrep;
memset(&fxfastrep, 0, sizeof(fxfastrep));
memset(&fastrep, 0, sizeof(fastrep));
kdc_log(r->context, r->config, 5, "Making FAST inner KRB-ERROR");
/* first add the KRB-ERROR to the fast errors */
ret = krb5_mk_error(r->context,
outer_error,
r->e_text,
NULL,
error_client,
error_server,
NULL,
NULL,
&e_data);
if (ret) {
kdc_log(r->context, r->config, 1,
"Failed to make inner KRB-ERROR: %d", ret);
return ret;
}
ret = krb5_padata_add(r->context, error_method,
KRB5_PADATA_FX_ERROR,
e_data.data, e_data.length);
if (ret) {
kdc_log(r->context, r->config, 1,
"Failed to make add FAST PADATA to inner KRB-ERROR: %d", ret);
krb5_data_free(&e_data);
return ret;
}
outer_error = KRB5_KDC_ERR_MORE_PREAUTH_DATA_REQUIRED;
r->e_text = NULL;
if (r->fast.flags.requested_hidden_names) {
error_client = NULL;
error_server = NULL;
}
csec = 0;
cusec = 0;
ret = _kdc_fast_mk_response(r->context, armor_crypto,
error_method, NULL, NULL,
req_body->nonce, &e_data);
free_METHOD_DATA(error_method);
if (ret) {
kdc_log(r->context, r->config, 1,
"Failed to make outer KRB-ERROR: %d", ret);
return ret;
}
ret = krb5_padata_add(r->context, error_method,
KRB5_PADATA_FX_FAST,
e_data.data, e_data.length);
if (ret) {
kdc_log(r->context, r->config, 1,
"Failed to make add FAST PADATA to outer KRB-ERROR: %d", ret);
return ret;
}
} else
kdc_log(r->context, r->config, 5, "Making non-FAST KRB-ERROR");
if (error_method && error_method->len) {
ASN1_MALLOC_ENCODE(METHOD_DATA, e_data.data, e_data.length,
error_method, &size, ret);
if (ret) {
kdc_log(r->context, r->config, 1,
"Failed to make encode METHOD-DATA: %d", ret);
return ret;
}
heim_assert(size == e_data.length, "internal asn.1 encoder error");
}
ret = krb5_mk_error(r->context,
outer_error,
r->e_text,
(e_data.length ? &e_data : NULL),
error_client,
error_server,
csec,
cusec,
error_msg);
krb5_data_free(&e_data);
if (ret)
kdc_log(r->context, r->config, 1,
"Failed to make encode KRB-ERROR: %d", ret);
return ret;
}
static krb5_error_code
fast_unwrap_request(astgs_request_t r,
krb5_ticket *tgs_ticket,
krb5_auth_context tgs_ac)
{
krb5_principal armor_server_principal = NULL;
char *armor_client_principal_name = NULL;
char *armor_server_principal_name = NULL;
PA_FX_FAST_REQUEST fxreq = {0};
krb5_auth_context ac = NULL;
krb5_ticket *ticket = NULL;
krb5_flags ap_req_options;
krb5_keyblock armorkey;
krb5_keyblock explicit_armorkey;
krb5_boolean explicit_armor;
krb5_error_code ret;
krb5_ap_req ap_req;
KrbFastReq fastreq = {0};
const PA_DATA *pa;
krb5_data data;
size_t len;
int i = 0;
pa = _kdc_find_padata(&r->req, &i, KRB5_PADATA_FX_FAST);
if (pa == NULL) {
if (tgs_ac && r->fast_asserted) {
kdc_log(r->context, r->config, 1,
"Client asserted FAST but did not include FX-FAST pa-data");
ret = KRB5KRB_AP_ERR_MODIFIED;
goto out;
}
kdc_log(r->context, r->config, 10, "Not a FAST request");
return 0;
}
ret = decode_PA_FX_FAST_REQUEST(pa->padata_value.data,
pa->padata_value.length,
&fxreq,
&len);
if (ret) {
kdc_log(r->context, r->config, 4,
"Failed to decode PA-FX-FAST-REQUEST: %d", ret);
goto out;
}
if (fxreq.element != choice_PA_FX_FAST_REQUEST_armored_data) {
kdc_log(r->context, r->config, 4,
"PA-FX-FAST-REQUEST contains unknown type: %d",
(int)fxreq.element);
ret = KRB5KDC_ERR_PREAUTH_FAILED;
goto out;
}
/*
* If check for armor data or it's not a TGS-REQ with implicit
* armor.
*/
if (fxreq.u.armored_data.armor == NULL && tgs_ac == NULL) {
kdc_log(r->context, r->config, 4,
"AS-REQ armor missing");
ret = KRB5KDC_ERR_PREAUTH_FAILED;
goto out;
}
explicit_armor = fxreq.u.armored_data.armor != NULL && tgs_ac != NULL;
/*
*
*/
if (fxreq.u.armored_data.armor != NULL) {
if (fxreq.u.armored_data.armor->armor_type != 1) {
kdc_log(r->context, r->config, 4,
"Incorrect AS-REQ armor type");
ret = KRB5KDC_ERR_PREAUTH_FAILED;
goto out;
}
ret = krb5_decode_ap_req(r->context,
&fxreq.u.armored_data.armor->armor_value,
&ap_req);
if(ret) {
kdc_log(r->context, r->config, 4, "Failed to decode AP-REQ");
goto out;
}
/* Save that principal that was in the request */
ret = _krb5_principalname2krb5_principal(r->context,
&armor_server_principal,
ap_req.ticket.sname,
ap_req.ticket.realm);
if (ret) {
free_AP_REQ(&ap_req);
goto out;
}
ret = _kdc_db_fetch(r->context, r->config, armor_server_principal,
HDB_F_GET_KRBTGT | HDB_F_DELAY_NEW_KEYS,
(krb5uint32 *)ap_req.ticket.enc_part.kvno,
&r->armor_serverdb, &r->armor_server);
if(ret == HDB_ERR_NOT_FOUND_HERE) {
free_AP_REQ(&ap_req);
kdc_log(r->context, r->config, 5,
"Armor key does not have secrets at this KDC, "
"need to proxy");
goto out;
} else if (ret) {
free_AP_REQ(&ap_req);
ret = KRB5KDC_ERR_S_PRINCIPAL_UNKNOWN;
goto out;
}
ret = hdb_enctype2key(r->context, r->armor_server, NULL,
ap_req.ticket.enc_part.etype,
&r->armor_key);
if (ret) {
free_AP_REQ(&ap_req);
goto out;
}
ret = krb5_verify_ap_req2(r->context, &ac,
&ap_req,
armor_server_principal,
&r->armor_key->key,
0,
&ap_req_options,
&r->armor_ticket,
KRB5_KU_AP_REQ_AUTH);
free_AP_REQ(&ap_req);
if (ret)
goto out;
ret = krb5_unparse_name(r->context, armor_server_principal,
&armor_server_principal_name);
if (ret)
goto out;
/* FIXME krb5_verify_ap_req2() also checks this */
ret = _kdc_verify_flags(r->context, r->config,
&r->armor_ticket->ticket,
armor_server_principal_name);
if (ret) {
_kdc_audit_addreason((kdc_request_t)r,
"Armor TGT expired or invalid");
goto out;
}
ticket = r->armor_ticket;
} else {
heim_assert(tgs_ticket != NULL, "TGS authentication context without ticket");
ac = tgs_ac;
ticket = tgs_ticket;
}
krb5_unparse_name(r->context, ticket->client, &armor_client_principal_name);
_kdc_audit_addkv((kdc_request_t)r, 0, "armor_client_name", "%s",
armor_client_principal_name ? armor_client_principal_name : "<unknown>");
if (ac->remote_subkey == NULL) {
krb5_auth_con_free(r->context, ac);
kdc_log(r->context, r->config, 2,
"FAST AP-REQ remote subkey missing");
ret = KRB5KDC_ERR_PREAUTH_FAILED;
goto out;
}
r->fast.flags.kdc_verified =
!_kdc_is_anonymous_pkinit(r->context, ticket->client);
ret = _krb5_fast_armor_key(r->context,
ac->remote_subkey,
&ticket->ticket.key,
&armorkey,
explicit_armor ? NULL : &r->armor_crypto);
if (ret)
goto out;
if (explicit_armor) {
ret = _krb5_fast_explicit_armor_key(r->context,
&armorkey,
tgs_ac->remote_subkey,
&explicit_armorkey,
&r->armor_crypto);
if (ret)
goto out;
krb5_free_keyblock_contents(r->context, &explicit_armorkey);
}
krb5_free_keyblock_contents(r->context, &armorkey);
ret = krb5_decrypt_EncryptedData(r->context, r->armor_crypto,
KRB5_KU_FAST_ENC,
&fxreq.u.armored_data.enc_fast_req,
&data);
if (ret) {
kdc_log(r->context, r->config, 2,
"Failed to decrypt FAST request");
goto out;
}
ret = decode_KrbFastReq(data.data, data.length, &fastreq, NULL);
krb5_data_free(&data);
if (ret)
goto out;
/*
* verify req-checksum of the outer body
*/
if (tgs_ac) {
/*
* -- For TGS, contains the checksum performed over the type
* -- AP-REQ in the PA-TGS-REQ padata.
*/
i = 0;
pa = _kdc_find_padata(&r->req, &i, KRB5_PADATA_TGS_REQ);
if (pa == NULL) {
kdc_log(r->context, r->config, 4,
"FAST TGS request missing TGS-REQ padata");
ret = KRB5KRB_ERR_GENERIC;
goto out;
}
ret = _kdc_verify_checksum(r->context, r->armor_crypto,
KRB5_KU_FAST_REQ_CHKSUM,
&pa->padata_value,
&fxreq.u.armored_data.req_checksum);
if (ret) {
kdc_log(r->context, r->config, 2,
"Bad checksum in FAST TGS request");
goto out;
}
} else {
/*
* -- For AS, contains the checksum performed over the type
* -- KDC-REQ-BODY for the req-body field of the KDC-REQ
* -- structure;
*/
ret = _kdc_verify_checksum(r->context, r->armor_crypto,
KRB5_KU_FAST_REQ_CHKSUM,
&r->req.req_body._save,
&fxreq.u.armored_data.req_checksum);
if (ret) {
kdc_log(r->context, r->config, 2,
"Bad checksum in FAST AS request");
goto out;
}
}
/*
* check for unsupported mandatory options
*/
if (FastOptions2int(fastreq.fast_options) & 0xfffc) {
kdc_log(r->context, r->config, 2,
"FAST unsupported mandatory option set");
ret = KRB5_KDC_ERR_UNKNOWN_CRITICAL_FAST_OPTIONS;
goto out;
}
r->fast.flags.requested_hidden_names = fastreq.fast_options.hide_client_names;
/* KDC MUST ignore outer pa data preauth-14 - 6.5.5 */
if (r->req.padata)
free_METHOD_DATA(r->req.padata);
else
ALLOC(r->req.padata);
ret = copy_METHOD_DATA(&fastreq.padata, r->req.padata);
if (ret)
goto out;
free_KDC_REQ_BODY(&r->req.req_body);
ret = copy_KDC_REQ_BODY(&fastreq.req_body, &r->req.req_body);
if (ret)
goto out;
kdc_log(r->context, r->config, 5, "Client selected FAST");
out:
if (ac && ac != tgs_ac)
krb5_auth_con_free(r->context, ac);
krb5_free_principal(r->context, armor_server_principal);
krb5_xfree(armor_client_principal_name);
krb5_xfree(armor_server_principal_name);
free_KrbFastReq(&fastreq);
free_PA_FX_FAST_REQUEST(&fxreq);
return ret;
}
/*
*
*/
krb5_error_code
_kdc_fast_unwrap_request(astgs_request_t r,
krb5_ticket *tgs_ticket,
krb5_auth_context tgs_ac)
{
krb5_error_code ret;
const PA_DATA *pa;
int i = 0;
ret = fast_unwrap_request(r, tgs_ticket, tgs_ac);
if (ret)
return ret;
/*
* FX-COOKIE can be used outside of FAST, e.g. SRP or GSS.
*/
pa = _kdc_find_padata(&r->req, &i, KRB5_PADATA_FX_COOKIE);
if (pa) {
krb5_const_principal ticket_client = NULL;
if (tgs_ticket)
ticket_client = tgs_ticket->client;
ret = fast_parse_cookie(r, ticket_client, pa);
}
return ret;
}
/*
* Strengthen reply key by mixing with a random key that is
* protected by FAST.
*/
krb5_error_code
_kdc_fast_strengthen_reply_key(astgs_request_t r)
{
if (r->armor_crypto) {
krb5_keyblock new_reply_key;
krb5_error_code ret;
kdc_log(r->context, r->config, 5,
"FAST strengthen reply key with strengthen-key");
heim_assert(r->reply_key.keytype != KRB5_ENCTYPE_NULL, "NULL reply key enctype");
ret = krb5_generate_random_keyblock(r->context, r->reply_key.keytype,
&r->strengthen_key);
if (ret)
krb5_abortx(r->context, "random generator fail");
ret = _krb5_fast_cf2(r->context,
&r->strengthen_key, "strengthenkey",
&r->reply_key, "replykey",
&new_reply_key, NULL);
if (ret)
return ret;
krb5_free_keyblock_contents(r->context, &r->reply_key);
r->reply_key = new_reply_key;
}
return 0;
}
/*
* Zero and free KDCFastState
*/
void
_kdc_free_fast_state(KDCFastState *state)
{
size_t i;
for (i = 0; i < state->fast_state.len; i++) {
PA_DATA *pa = &state->fast_state.val[i];
if (pa->padata_value.data)
memset_s(pa->padata_value.data, 0,
pa->padata_value.length, pa->padata_value.length);
}
free_KDCFastState(state);
}
krb5_error_code
_kdc_fast_check_armor_pac(astgs_request_t r)
{
krb5_error_code ret;
int flags;
krb5_boolean ad_kdc_issued = FALSE;
krb5_pac mspac = NULL;
krb5_principal armor_client_principal = NULL;
HDB *armor_db;
hdb_entry *armor_client = NULL;
char *armor_client_principal_name = NULL;
flags = HDB_F_FOR_TGS_REQ;
if (_kdc_synthetic_princ_used_p(r->context, r->armor_ticket))
flags |= HDB_F_SYNTHETIC_OK;
if (r->req.req_body.kdc_options.canonicalize)
flags |= HDB_F_CANON;
ret = _krb5_principalname2krb5_principal(r->context,
&armor_client_principal,
r->armor_ticket->ticket.cname,
r->armor_ticket->ticket.crealm);
if (ret)
goto out;
ret = krb5_unparse_name(r->context, armor_client_principal,
&armor_client_principal_name);
if (ret)
goto out;
ret = _kdc_db_fetch_client(r->context, r->config, flags,
armor_client_principal, armor_client_principal_name,
r->req.req_body.realm, &armor_db, &armor_client);
if (ret)
goto out;
ret = kdc_check_flags(r, FALSE, armor_client, NULL);
if (ret)
goto out;
ret = _kdc_check_pac(r->context, r->config, armor_client_principal, NULL,
armor_client, r->armor_server,
r->armor_server, r->armor_server,
&r->armor_key->key, &r->armor_key->key,
&r->armor_ticket->ticket, &ad_kdc_issued, &mspac, NULL, NULL);
if (ret) {
const char *msg = krb5_get_error_message(r->context, ret);
kdc_log(r->context, r->config, 4,
"Verify armor PAC (%s) failed for %s (%s) from %s with %s (%s)",
armor_client_principal_name, r->cname, r->sname,
r->from, msg, mspac ? "Ticket unsigned" : "No PAC");
krb5_free_error_message(r->context, msg);
goto out;
}
out:
krb5_xfree(armor_client_principal_name);
if (armor_client)
_kdc_free_ent(r->context, armor_db, armor_client);
krb5_free_principal(r->context, armor_client_principal);
krb5_pac_free(r->context, mspac);
return ret;
}
Reference in New Issue View Git Blame Copy Permalink