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ae8908bf813632d86733fd7003e7b1f3fa1acae2
heimdal/lib/kadm5/ent_setup.c
Nicolas Williams ae8908bf81 kadmin: Add disallow-client attribute 
This is useful for services that need not be clients.  For example, an
untrusted service that need only accept authentication from clients,
but not initiate authentication to other services.
2021-06-22 13:01:24 -05:00

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/*
* Copyright (c) 1997 - 2000 Kungliga Tekniska Högskolan
* (Royal Institute of Technology, Stockholm, Sweden).
* All rights reserved.
*
* Portions Copyright (c) 2009 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 "kadm5_locl.h"
RCSID("$Id$");
#define set_value(X, V) do { if((X) == NULL) (X) = malloc(sizeof(*(X))); *(X) = V; } while(0)
#define set_null(X) do { if((X) != NULL) free((X)); (X) = NULL; } while (0)
static void
attr_to_flags(unsigned attr, HDBFlags *flags)
{
flags->postdate = !(attr & KRB5_KDB_DISALLOW_POSTDATED);
flags->forwardable = !(attr & KRB5_KDB_DISALLOW_FORWARDABLE);
flags->initial = !!(attr & KRB5_KDB_DISALLOW_TGT_BASED);
flags->renewable = !(attr & KRB5_KDB_DISALLOW_RENEWABLE);
flags->proxiable = !(attr & KRB5_KDB_DISALLOW_PROXIABLE);
/* DUP_SKEY */
flags->invalid = !!(attr & KRB5_KDB_DISALLOW_ALL_TIX);
flags->require_preauth = !!(attr & KRB5_KDB_REQUIRES_PRE_AUTH);
flags->require_pwchange = !!(attr & KRB5_KDB_REQUIRES_PWCHANGE);
/* HW_AUTH */
flags->server = !(attr & KRB5_KDB_DISALLOW_SVR);
flags->change_pw = !!(attr & KRB5_KDB_PWCHANGE_SERVICE);
flags->client = !(attr & KRB5_KDB_DISALLOW_CLIENT);
flags->ok_as_delegate = !!(attr & KRB5_KDB_OK_AS_DELEGATE);
flags->trusted_for_delegation = !!(attr & KRB5_KDB_TRUSTED_FOR_DELEGATION);
flags->allow_kerberos4 = !!(attr & KRB5_KDB_ALLOW_KERBEROS4);
flags->allow_digest = !!(attr & KRB5_KDB_ALLOW_DIGEST);
flags->materialize = !!(attr & KRB5_KDB_MATERIALIZE);
flags->virtual_keys = !!(attr & KRB5_KDB_VIRTUAL_KEYS);
flags->virtual = !!(attr & KRB5_KDB_VIRTUAL);
}
/*
* Modify the `ent' according to `tl_data'.
*/
static kadm5_ret_t
perform_tl_data(krb5_context context,
HDB *db,
hdb_entry_ex *ent,
const krb5_tl_data *tl_data)
{
kadm5_ret_t ret = 0;
if (tl_data->tl_data_type == KRB5_TL_PASSWORD) {
heim_utf8_string pw = tl_data->tl_data_contents;
if (pw[tl_data->tl_data_length] != '\0')
return KADM5_BAD_TL_TYPE;
ret = hdb_entry_set_password(context, db, &ent->entry, pw);
} else if (tl_data->tl_data_type == KRB5_TL_LAST_PWD_CHANGE) {
unsigned char *s;
time_t t;
if (tl_data->tl_data_length != 4)
return KADM5_BAD_TL_TYPE;
s = tl_data->tl_data_contents;
t = s[0] | (s[1] << 8) | (s[2] << 16) | (s[3] << 24);
ret = hdb_entry_set_pw_change_time(context, &ent->entry, t);
} else if (tl_data->tl_data_type == KRB5_TL_KEY_ROTATION) {
HDB_Ext_KeyRotation *prev_kr = 0;
HDB_extension *prev_ext;
HDB_extension ext;
ext.mandatory = 0;
ext.data.element = choice_HDB_extension_data_key_rotation;
prev_ext = hdb_find_extension(&ent->entry, ext.data.element);
if (prev_ext)
prev_kr = &prev_ext->data.u.key_rotation;
ret = decode_HDB_Ext_KeyRotation(tl_data->tl_data_contents,
tl_data->tl_data_length,
&ext.data.u.key_rotation, NULL);
if (ret == 0)
ret = hdb_validate_key_rotations(context, prev_kr,
&ext.data.u.key_rotation);
if (ret == 0)
ret = hdb_replace_extension(context, &ent->entry, &ext);
free_HDB_extension(&ext);
} else if (tl_data->tl_data_type == KRB5_TL_EXTENSION) {
HDB_extension ext;
ret = decode_HDB_extension(tl_data->tl_data_contents,
tl_data->tl_data_length,
&ext,
NULL);
if (ret)
return KADM5_BAD_TL_TYPE;
if (ext.data.element == choice_HDB_extension_data_key_rotation) {
HDB_extension *prev_ext = hdb_find_extension(&ent->entry,
ext.data.element);
HDB_Ext_KeyRotation *prev_kr = 0;
if (prev_ext)
prev_kr = &prev_ext->data.u.key_rotation;
ret = hdb_validate_key_rotations(context, prev_kr,
&ext.data.u.key_rotation);
}
if (ret)
ret = KADM5_BAD_TL_TYPE; /* XXX Need new error code */
if (ret == 0)
ret = hdb_replace_extension(context, &ent->entry, &ext);
free_HDB_extension(&ext);
} else if (tl_data->tl_data_type == KRB5_TL_ETYPES) {
if (!ent->entry.etypes &&
(ent->entry.etypes = calloc(1,
sizeof(ent->entry.etypes[0]))) == NULL)
ret = krb5_enomem(context);
if (ent->entry.etypes)
free_HDB_EncTypeList(ent->entry.etypes);
if (ret == 0)
ret = decode_HDB_EncTypeList(tl_data->tl_data_contents,
tl_data->tl_data_length,
ent->entry.etypes, NULL);
if (ret)
return KADM5_BAD_TL_TYPE;
} else {
return KADM5_BAD_TL_TYPE;
}
return ret;
}
static void
default_flags(hdb_entry_ex *ent)
{
ent->entry.flags.client = 1;
ent->entry.flags.server = 1;
ent->entry.flags.forwardable = 1;
ent->entry.flags.proxiable = 1;
ent->entry.flags.renewable = 1;
ent->entry.flags.postdate = 1;
}
/*
* Create the hdb entry `ent' based on data from `princ' with
* `princ_mask' specifying what fields to be gotten from there and
* `mask' specifying what fields we want filled in.
*/
kadm5_ret_t
_kadm5_setup_entry(kadm5_server_context *context,
hdb_entry_ex *ent,
uint32_t mask,
kadm5_principal_ent_t princ,
uint32_t princ_mask,
kadm5_principal_ent_t def,
uint32_t def_mask)
{
if(mask & KADM5_PRINC_EXPIRE_TIME
&& princ_mask & KADM5_PRINC_EXPIRE_TIME) {
if (princ->princ_expire_time)
set_value(ent->entry.valid_end, princ->princ_expire_time);
else
set_null(ent->entry.valid_end);
}
if(mask & KADM5_PW_EXPIRATION
&& princ_mask & KADM5_PW_EXPIRATION) {
if (princ->pw_expiration)
set_value(ent->entry.pw_end, princ->pw_expiration);
else
set_null(ent->entry.pw_end);
}
if(mask & KADM5_ATTRIBUTES) {
if (princ_mask & KADM5_ATTRIBUTES) {
attr_to_flags(princ->attributes, &ent->entry.flags);
} else if(def_mask & KADM5_ATTRIBUTES) {
attr_to_flags(def->attributes, &ent->entry.flags);
ent->entry.flags.invalid = 0;
} else {
default_flags(ent);
}
}
if(mask & KADM5_MAX_LIFE) {
if(princ_mask & KADM5_MAX_LIFE) {
if(princ->max_life)
set_value(ent->entry.max_life, princ->max_life);
else
set_null(ent->entry.max_life);
} else if(def_mask & KADM5_MAX_LIFE) {
if(def->max_life)
set_value(ent->entry.max_life, def->max_life);
else
set_null(ent->entry.max_life);
}
}
if(mask & KADM5_KVNO
&& (princ_mask & KADM5_KVNO)) {
krb5_error_code ret;
ret = hdb_change_kvno(context->context, princ->kvno, &ent->entry);
if (ret && ret != HDB_ERR_KVNO_NOT_FOUND)
return ret;
ent->entry.kvno = princ->kvno; /* force it */
}
if(mask & KADM5_MAX_RLIFE) {
if(princ_mask & KADM5_MAX_RLIFE) {
if(princ->max_renewable_life)
set_value(ent->entry.max_renew, princ->max_renewable_life);
else
set_null(ent->entry.max_renew);
} else if(def_mask & KADM5_MAX_RLIFE) {
if(def->max_renewable_life)
set_value(ent->entry.max_renew, def->max_renewable_life);
else
set_null(ent->entry.max_renew);
}
}
if(mask & KADM5_KEY_DATA
&& princ_mask & KADM5_KEY_DATA) {
_kadm5_set_keys2(context, &ent->entry,
princ->n_key_data, princ->key_data);
}
if(mask & KADM5_TL_DATA) {
krb5_tl_data *tl;
for (tl = princ->tl_data; tl != NULL; tl = tl->tl_data_next) {
kadm5_ret_t ret;
ret = perform_tl_data(context->context, context->db, ent, tl);
if (ret)
return ret;
}
}
if(mask & KADM5_FAIL_AUTH_COUNT) {
/* XXX */
}
return 0;
}
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