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/*
* Copyright (c) 2019 Kungliga Tekniska Högskolan
* (Royal Institute of Technology, Stockholm, Sweden).
* 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 <hex.h>
#include <rfc2459_asn1.h>
#include "../lib/hx509/hx_locl.h"
#include <stdarg.h>
/*
* This file implements a singular utility function `kdc_issue_certificate()'
* for certificate issuance for kx509 and bx509, which takes a principal name,
* an `hx509_request' resulting from parsing a CSR and possibly adding
* SAN/EKU/KU extensions, the start/end times of request's authentication
* method, and whether to include a full certificate chain in the result.
*/
/*
* Get a configuration sub-tree for kx509 based on what's being requested and
* by whom.
*
* We have a number of cases:
*
* - default certificate (no CSR used, or no certificate extensions requested)
* - for client principals
* - for service principals
* - client certificate requested (CSR used and client-y SANs/EKUs requested)
* - server certificate requested (CSR used and server-y SANs/EKUs requested)
* - mixed client/server certificate requested (...)
*/
static krb5_error_code
get_cf(krb5_context context,
const char *app_name,
krb5_log_facility *logf,
hx509_request req,
krb5_principal cprinc,
const krb5_config_binding **cf)
{
krb5_error_code ret = ENOTSUP;
const char *realm = krb5_principal_get_realm(context, cprinc);
*cf = NULL;
if (strcmp(app_name, "kdc") == 0)
*cf = krb5_config_get_list(context, NULL, app_name, "realms", realm,
"kx509", NULL);
else
*cf = krb5_config_get_list(context, NULL, app_name, "realms", realm,
NULL);
if (*cf)
ret = 0;
if (ret) {
krb5_log_msg(context, logf, 3, NULL,
"No %s configuration for certification authority [%s] "
"realm %s -> kx509 -> ...", app_name,
strcmp(app_name, "bx509") == 0 ? "bx509" : "kx509",
realm);
krb5_set_error_message(context, KRB5KDC_ERR_POLICY,
"No %s configuration for certification authority [%s] "
"realm %s -> kx509 -> ...", app_name,
strcmp(app_name, "bx509") == 0 ? "bx509" : "kx509",
realm);
}
return ret;
}
/*
* Build a certifate for `principal' and its CSR.
*/
KDC_LIB_FUNCTION krb5_error_code KDC_LIB_CALL
kdc_issue_certificate(krb5_context context,
const char *app_name,
krb5_log_facility *logf,
hx509_request req,
krb5_principal cprinc,
krb5_times *auth_times,
time_t req_life,
int send_chain,
hx509_certs *out)
{
const krb5_config_binding *cf;
krb5_error_code ret = KRB5KDC_ERR_POLICY;
KRB5PrincipalName cprinc2;
*out = NULL;
cprinc2.principalName = cprinc->name;
cprinc2.realm = cprinc->realm;
/* Get configuration */
ret = get_cf(context, app_name, logf, req, cprinc, &cf);
if (ret == 0)
ret = _hx509_ca_issue_certificate(context->hx509ctx,
(const heim_config_binding *)cf,
logf, req, &cprinc2,
auth_times->starttime,
auth_times->endtime,
req_life,
send_chain,
out);
if (ret == EACCES)
ret = KRB5KDC_ERR_POLICY;
return ret;
}
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