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5716b51c184b10600955f3a75dd1b396d06cdace
heimdal/kdc/default_config.c
Nicolas Williams 5447b81fb1 hdb: Move virtual principals into HDB layer 
This is a large commit that adds several features:

 - Revamps and moves virtual host-based service principal functionality
   from kdc/ to lib/hdb/ so that it may be automatically visible to
   lib/kadm5/, as well as kadmin(1)/kadmind(8) and ktutil(1).

   The changes are backwards-incompatible.

 - Completes support for documenting a service principal's supported
   enctypes in its HDB entry independently of its long-term keys.  This
   will reduce HDB bloat by not requiring that service principals have
   more long-term keys than they need just to document the service's
   supported enctypes.

 - Adds support for storing krb5.conf content in principals' HDB
   entries.  This may eventually be used for causing Heimdal KDC
   services to reconfigure primary/secondary roles automatically by
   discovering the configured primary in an HDB entry for the realm.

   For now this will be used to help reduce the amount of configuration
   needed by clients of an upcoming HTTP binding of the kadmin service.
2020-09-08 00:25:36 -05:00

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/*
* Copyright (c) 1997-2007 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 "kdc_locl.h"
#include <getarg.h>
#include <parse_bytes.h>
static const char *sysplugin_dirs[] = {
#ifdef _WIN32
"$ORIGIN",
#else
"$ORIGIN/../lib/plugin/kdc",
#endif
#ifdef __APPLE__
LIBDIR "/plugin/kdc",
#endif
NULL
};
static void
load_kdc_plugins_once(void *ctx)
{
krb5_context context = ctx;
const char * const *dirs = sysplugin_dirs;
#ifndef _WIN32
char **cfdirs;
cfdirs = krb5_config_get_strings(context, NULL, "kdc", "plugin_dir", NULL);
if (cfdirs)
dirs = (const char * const *)cfdirs;
#endif
_krb5_load_plugins(context, "kdc", (const char **)dirs);
#ifndef _WIN32
krb5_config_free_strings(cfdirs);
#endif
}
krb5_error_code
krb5_kdc_get_config(krb5_context context, krb5_kdc_configuration **config)
{
static heim_base_once_t load_kdc_plugins = HEIM_BASE_ONCE_INIT;
krb5_kdc_configuration *c;
heim_base_once_f(&load_kdc_plugins, context, load_kdc_plugins_once);
c = calloc(1, sizeof(*c));
if (c == NULL) {
krb5_set_error_message(context, ENOMEM, "malloc: out of memory");
return ENOMEM;
}
c->app = "kdc";
c->num_kdc_processes = -1;
c->require_preauth = TRUE;
c->kdc_warn_pwexpire = 0;
c->encode_as_rep_as_tgs_rep = FALSE;
c->tgt_use_strongest_session_key = FALSE;
c->preauth_use_strongest_session_key = FALSE;
c->svc_use_strongest_session_key = FALSE;
c->use_strongest_server_key = TRUE;
c->check_ticket_addresses = TRUE;
c->allow_null_ticket_addresses = TRUE;
c->allow_anonymous = FALSE;
c->historical_anon_realm = FALSE;
c->strict_nametypes = FALSE;
c->trpolicy = TRPOLICY_ALWAYS_CHECK;
c->enable_pkinit = FALSE;
c->pkinit_princ_in_cert = TRUE;
c->pkinit_require_binding = TRUE;
c->db = NULL;
c->num_db = 0;
c->logf = NULL;
c->num_kdc_processes =
krb5_config_get_int_default(context, NULL, c->num_kdc_processes,
"kdc", "num-kdc-processes", NULL);
c->require_preauth =
krb5_config_get_bool_default(context, NULL,
c->require_preauth,
"kdc", "require-preauth", NULL);
#ifdef DIGEST
c->enable_digest =
krb5_config_get_bool_default(context, NULL,
FALSE,
"kdc", "enable-digest", NULL);
{
const char *digests;
digests = krb5_config_get_string(context, NULL,
"kdc",
"digests_allowed", NULL);
if (digests == NULL)
digests = "ntlm-v2";
c->digests_allowed = parse_flags(digests,_kdc_digestunits, 0);
if (c->digests_allowed == -1) {
kdc_log(context, c, 0,
"unparsable digest units (%s), turning off digest",
digests);
c->enable_digest = 0;
} else if (c->digests_allowed == 0) {
kdc_log(context, c, 0, "no digest enable, turning digest off");
c->enable_digest = 0;
}
}
#endif
#ifdef KX509
c->enable_kx509 =
krb5_config_get_bool_default(context, NULL,
FALSE,
"kdc", "enable_kx509", NULL);
#endif
c->tgt_use_strongest_session_key =
krb5_config_get_bool_default(context, NULL,
c->tgt_use_strongest_session_key,
"kdc",
"tgt-use-strongest-session-key", NULL);
c->preauth_use_strongest_session_key =
krb5_config_get_bool_default(context, NULL,
c->preauth_use_strongest_session_key,
"kdc",
"preauth-use-strongest-session-key", NULL);
c->svc_use_strongest_session_key =
krb5_config_get_bool_default(context, NULL,
c->svc_use_strongest_session_key,
"kdc",
"svc-use-strongest-session-key", NULL);
c->use_strongest_server_key =
krb5_config_get_bool_default(context, NULL,
c->use_strongest_server_key,
"kdc",
"use-strongest-server-key", NULL);
c->check_ticket_addresses =
krb5_config_get_bool_default(context, NULL,
c->check_ticket_addresses,
"kdc",
"check-ticket-addresses", NULL);
c->allow_null_ticket_addresses =
krb5_config_get_bool_default(context, NULL,
c->allow_null_ticket_addresses,
"kdc",
"allow-null-ticket-addresses", NULL);
c->allow_anonymous =
krb5_config_get_bool_default(context, NULL,
c->allow_anonymous,
"kdc",
"allow-anonymous", NULL);
c->historical_anon_realm =
krb5_config_get_bool_default(context, NULL,
c->historical_anon_realm,
"kdc",
"historical_anon_realm", NULL);
c->strict_nametypes =
krb5_config_get_bool_default(context, NULL,
c->strict_nametypes,
"kdc",
"strict-nametypes", NULL);
c->max_datagram_reply_length =
krb5_config_get_int_default(context,
NULL,
1400,
"kdc",
"max-kdc-datagram-reply-length",
NULL);
{
const char *trpolicy_str;
trpolicy_str =
krb5_config_get_string_default(context, NULL, "DEFAULT", "kdc",
"transited-policy", NULL);
if(strcasecmp(trpolicy_str, "always-check") == 0) {
c->trpolicy = TRPOLICY_ALWAYS_CHECK;
} else if(strcasecmp(trpolicy_str, "allow-per-principal") == 0) {
c->trpolicy = TRPOLICY_ALLOW_PER_PRINCIPAL;
} else if(strcasecmp(trpolicy_str, "always-honour-request") == 0) {
c->trpolicy = TRPOLICY_ALWAYS_HONOUR_REQUEST;
} else if(strcasecmp(trpolicy_str, "DEFAULT") == 0) {
/* default */
} else {
kdc_log(context, c, 0,
"unknown transited-policy: %s, "
"reverting to default (always-check)",
trpolicy_str);
}
}
c->encode_as_rep_as_tgs_rep =
krb5_config_get_bool_default(context, NULL,
c->encode_as_rep_as_tgs_rep,
"kdc",
"encode_as_rep_as_tgs_rep", NULL);
c->kdc_warn_pwexpire =
krb5_config_get_time_default (context, NULL,
c->kdc_warn_pwexpire,
"kdc", "kdc_warn_pwexpire", NULL);
c->enable_pkinit =
krb5_config_get_bool_default(context,
NULL,
c->enable_pkinit,
"kdc",
"enable-pkinit",
NULL);
c->pkinit_kdc_identity =
krb5_config_get_string(context, NULL,
"kdc", "pkinit_identity", NULL);
c->pkinit_kdc_anchors =
krb5_config_get_string(context, NULL,
"kdc", "pkinit_anchors", NULL);
c->pkinit_kdc_cert_pool =
krb5_config_get_strings(context, NULL,
"kdc", "pkinit_pool", NULL);
c->pkinit_kdc_revoke =
krb5_config_get_strings(context, NULL,
"kdc", "pkinit_revoke", NULL);
c->pkinit_kdc_ocsp_file =
krb5_config_get_string(context, NULL,
"kdc", "pkinit_kdc_ocsp", NULL);
c->pkinit_kdc_friendly_name =
krb5_config_get_string(context, NULL,
"kdc", "pkinit_kdc_friendly_name", NULL);
c->pkinit_princ_in_cert =
krb5_config_get_bool_default(context, NULL,
c->pkinit_princ_in_cert,
"kdc",
"pkinit_principal_in_certificate",
NULL);
c->pkinit_require_binding =
krb5_config_get_bool_default(context, NULL,
c->pkinit_require_binding,
"kdc",
"pkinit_win2k_require_binding",
NULL);
c->pkinit_dh_min_bits =
krb5_config_get_int_default(context, NULL,
0,
"kdc", "pkinit_dh_min_bits", NULL);
*config = c;
return 0;
}
krb5_error_code
krb5_kdc_pkinit_config(krb5_context context, krb5_kdc_configuration *config)
{
#ifdef PKINIT
#ifdef __APPLE__
config->enable_pkinit = 1;
if (config->pkinit_kdc_identity == NULL) {
if (config->pkinit_kdc_friendly_name == NULL)
config->pkinit_kdc_friendly_name =
strdup("O=System Identity,CN=com.apple.kerberos.kdc");
config->pkinit_kdc_identity = strdup("KEYCHAIN:");
}
if (config->pkinit_kdc_anchors == NULL)
config->pkinit_kdc_anchors = strdup("KEYCHAIN:");
#endif /* __APPLE__ */
if (config->enable_pkinit) {
if (config->pkinit_kdc_identity == NULL)
krb5_errx(context, 1, "pkinit enabled but no identity");
if (config->pkinit_kdc_anchors == NULL)
krb5_errx(context, 1, "pkinit enabled but no X509 anchors");
krb5_kdc_pk_initialize(context, config,
config->pkinit_kdc_identity,
config->pkinit_kdc_anchors,
config->pkinit_kdc_cert_pool,
config->pkinit_kdc_revoke);
}
return 0;
#endif /* PKINIT */
}
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