546 lines
14 KiB
C
546 lines
14 KiB
C
/*
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* Copyright (c) 1997 - 2002 Kungliga Tekniska Högskolan
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* (Royal Institute of Technology, Stockholm, Sweden).
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* All rights reserved.
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*
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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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*
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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
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* documentation and/or other materials provided with the distribution.
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*
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* 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
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* without specific prior written permission.
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*
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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
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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* ARE DISCLAIMED. IN NO EVENT SHALL THE INSTITUTE OR CONTRIBUTORS BE LIABLE
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* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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* 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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*/
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#include "krb5_locl.h"
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#include <com_err.h>
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RCSID("$Id: context.c,v 1.83.2.1 2004/08/20 15:30:24 lha Exp $");
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#define INIT_FIELD(C, T, E, D, F) \
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(C)->E = krb5_config_get_ ## T ## _default ((C), NULL, (D), \
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"libdefaults", F, NULL)
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/*
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* Set the list of etypes `ret_etypes' from the configuration variable
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* `name'
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*/
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static krb5_error_code
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set_etypes (krb5_context context,
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const char *name,
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krb5_enctype **ret_enctypes)
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{
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char **etypes_str;
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krb5_enctype *etypes = NULL;
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etypes_str = krb5_config_get_strings(context, NULL, "libdefaults",
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name, NULL);
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if(etypes_str){
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int i, j, k;
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for(i = 0; etypes_str[i]; i++);
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etypes = malloc((i+1) * sizeof(*etypes));
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if (etypes == NULL) {
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krb5_config_free_strings (etypes_str);
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krb5_set_error_string (context, "malloc: out of memory");
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return ENOMEM;
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}
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for(j = 0, k = 0; j < i; j++) {
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if(krb5_string_to_enctype(context, etypes_str[j], &etypes[k]) == 0)
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k++;
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}
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etypes[k] = ETYPE_NULL;
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krb5_config_free_strings(etypes_str);
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}
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*ret_enctypes = etypes;
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return 0;
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}
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/*
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* read variables from the configuration file and set in `context'
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*/
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static krb5_error_code
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init_context_from_config_file(krb5_context context)
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{
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krb5_error_code ret;
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const char * tmp;
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krb5_enctype *tmptypes;
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INIT_FIELD(context, time, max_skew, 5 * 60, "clockskew");
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INIT_FIELD(context, time, kdc_timeout, 3, "kdc_timeout");
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INIT_FIELD(context, int, max_retries, 3, "max_retries");
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INIT_FIELD(context, string, http_proxy, NULL, "http_proxy");
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ret = set_etypes (context, "default_etypes", &tmptypes);
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if(ret)
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return ret;
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free(context->etypes);
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context->etypes = tmptypes;
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ret = set_etypes (context, "default_etypes_des", &tmptypes);
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if(ret)
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return ret;
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free(context->etypes_des);
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context->etypes_des = tmptypes;
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/* default keytab name */
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tmp = NULL;
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if(!issuid())
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tmp = getenv("KRB5_KTNAME");
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if(tmp != NULL)
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context->default_keytab = tmp;
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else
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INIT_FIELD(context, string, default_keytab,
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KEYTAB_DEFAULT, "default_keytab_name");
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INIT_FIELD(context, string, default_keytab_modify,
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NULL, "default_keytab_modify_name");
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INIT_FIELD(context, string, time_fmt,
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"%Y-%m-%dT%H:%M:%S", "time_format");
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INIT_FIELD(context, string, date_fmt,
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"%Y-%m-%d", "date_format");
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INIT_FIELD(context, bool, log_utc,
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FALSE, "log_utc");
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/* init dns-proxy slime */
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tmp = krb5_config_get_string(context, NULL, "libdefaults",
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"dns_proxy", NULL);
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if(tmp)
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roken_gethostby_setup(context->http_proxy, tmp);
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krb5_free_host_realm (context, context->default_realms);
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context->default_realms = NULL;
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{
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krb5_addresses addresses;
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char **adr, **a;
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krb5_set_extra_addresses(context, NULL);
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adr = krb5_config_get_strings(context, NULL,
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"libdefaults",
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"extra_addresses",
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NULL);
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memset(&addresses, 0, sizeof(addresses));
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for(a = adr; a && *a; a++) {
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ret = krb5_parse_address(context, *a, &addresses);
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if (ret == 0) {
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krb5_add_extra_addresses(context, &addresses);
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krb5_free_addresses(context, &addresses);
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}
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}
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krb5_config_free_strings(adr);
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krb5_set_ignore_addresses(context, NULL);
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adr = krb5_config_get_strings(context, NULL,
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"libdefaults",
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"ignore_addresses",
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NULL);
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memset(&addresses, 0, sizeof(addresses));
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for(a = adr; a && *a; a++) {
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ret = krb5_parse_address(context, *a, &addresses);
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if (ret == 0) {
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krb5_add_ignore_addresses(context, &addresses);
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krb5_free_addresses(context, &addresses);
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}
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}
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krb5_config_free_strings(adr);
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}
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INIT_FIELD(context, bool, scan_interfaces, TRUE, "scan_interfaces");
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INIT_FIELD(context, int, fcache_vno, 0, "fcache_version");
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/* prefer dns_lookup_kdc over srv_lookup. */
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INIT_FIELD(context, bool, srv_lookup, TRUE, "srv_lookup");
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INIT_FIELD(context, bool, srv_lookup, context->srv_lookup, "dns_lookup_kdc");
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context->default_cc_name = NULL;
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return 0;
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}
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krb5_error_code
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krb5_init_context(krb5_context *context)
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{
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krb5_context p;
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krb5_error_code ret;
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char **files;
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p = calloc(1, sizeof(*p));
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if(!p)
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return ENOMEM;
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ret = krb5_get_default_config_files(&files);
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if(ret)
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goto out;
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ret = krb5_set_config_files(p, files);
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krb5_free_config_files(files);
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if(ret)
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goto out;
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/* init error tables */
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krb5_init_ets(p);
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p->cc_ops = NULL;
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p->num_cc_ops = 0;
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krb5_cc_register(p, &krb5_fcc_ops, TRUE);
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krb5_cc_register(p, &krb5_mcc_ops, TRUE);
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p->num_kt_types = 0;
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p->kt_types = NULL;
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krb5_kt_register (p, &krb5_fkt_ops);
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krb5_kt_register (p, &krb5_mkt_ops);
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krb5_kt_register (p, &krb5_akf_ops);
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krb5_kt_register (p, &krb4_fkt_ops);
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krb5_kt_register (p, &krb5_srvtab_fkt_ops);
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krb5_kt_register (p, &krb5_any_ops);
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out:
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if(ret) {
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krb5_free_context(p);
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p = NULL;
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}
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*context = p;
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return ret;
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}
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void
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krb5_free_context(krb5_context context)
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{
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if (context->default_cc_name)
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free(context->default_cc_name);
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free(context->etypes);
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free(context->etypes_des);
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krb5_free_host_realm (context, context->default_realms);
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krb5_config_file_free (context, context->cf);
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free_error_table (context->et_list);
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free(context->cc_ops);
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free(context->kt_types);
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krb5_clear_error_string(context);
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if(context->warn_dest != NULL)
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krb5_closelog(context, context->warn_dest);
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krb5_set_extra_addresses(context, NULL);
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krb5_set_ignore_addresses(context, NULL);
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free(context);
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}
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krb5_error_code
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krb5_set_config_files(krb5_context context, char **filenames)
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{
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krb5_error_code ret;
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krb5_config_binding *tmp = NULL;
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while(filenames != NULL && *filenames != NULL && **filenames != '\0') {
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ret = krb5_config_parse_file_multi(context, *filenames, &tmp);
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if(ret != 0 && ret != ENOENT) {
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krb5_config_file_free(context, tmp);
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return ret;
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}
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filenames++;
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}
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#if 0
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/* with this enabled and if there are no config files, Kerberos is
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considererd disabled */
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if(tmp == NULL)
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return ENXIO;
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#endif
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krb5_config_file_free(context, context->cf);
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context->cf = tmp;
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ret = init_context_from_config_file(context);
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return ret;
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}
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krb5_error_code
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krb5_get_default_config_files(char ***pfilenames)
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{
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const char *p, *q;
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char **pp;
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int n, i;
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const char *files = NULL;
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if (pfilenames == NULL)
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return EINVAL;
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if(!issuid())
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files = getenv("KRB5_CONFIG");
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if (files == NULL)
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files = krb5_config_file;
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for(n = 0, p = files; strsep_copy(&p, ":", NULL, 0) != -1; n++);
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pp = malloc((n + 1) * sizeof(*pp));
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if(pp == NULL)
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return ENOMEM;
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n = 0;
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p = files;
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while(1) {
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ssize_t l;
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q = p;
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l = strsep_copy(&q, ":", NULL, 0);
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if(l == -1)
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break;
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pp[n] = malloc(l + 1);
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if(pp[n] == NULL) {
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krb5_free_config_files(pp);
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return ENOMEM;
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}
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l = strsep_copy(&p, ":", pp[n], l + 1);
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for(i = 0; i < n; i++)
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if(strcmp(pp[i], pp[n]) == 0) {
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free(pp[n]);
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goto skip;
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}
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n++;
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skip:;
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}
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pp[n] = NULL;
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*pfilenames = pp;
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return 0;
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}
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void
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krb5_free_config_files(char **filenames)
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{
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char **p;
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for(p = filenames; *p != NULL; p++)
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free(*p);
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free(filenames);
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}
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/*
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* set `etype' to a malloced list of the default enctypes
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*/
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static krb5_error_code
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default_etypes(krb5_context context, krb5_enctype **etype)
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{
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krb5_enctype p[] = {
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ETYPE_DES3_CBC_SHA1,
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ETYPE_DES3_CBC_MD5,
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ETYPE_ARCFOUR_HMAC_MD5,
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ETYPE_DES_CBC_MD5,
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ETYPE_DES_CBC_MD4,
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ETYPE_DES_CBC_CRC,
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ETYPE_NULL
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};
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*etype = malloc(sizeof(p));
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if(*etype == NULL) {
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krb5_set_error_string (context, "malloc: out of memory");
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return ENOMEM;
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}
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memcpy(*etype, p, sizeof(p));
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return 0;
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}
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krb5_error_code
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krb5_set_default_in_tkt_etypes(krb5_context context,
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const krb5_enctype *etypes)
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{
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int i;
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krb5_enctype *p = NULL;
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if(etypes) {
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for (i = 0; etypes[i]; ++i)
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if(!krb5_enctype_valid(context, etypes[i])) {
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krb5_set_error_string(context, "enctype %d not supported",
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etypes[i]);
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return KRB5_PROG_ETYPE_NOSUPP;
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}
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++i;
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ALLOC(p, i);
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if(!p) {
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krb5_set_error_string (context, "malloc: out of memory");
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return ENOMEM;
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}
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memmove(p, etypes, i * sizeof(krb5_enctype));
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}
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if(context->etypes)
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free(context->etypes);
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context->etypes = p;
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return 0;
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}
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krb5_error_code
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krb5_get_default_in_tkt_etypes(krb5_context context,
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krb5_enctype **etypes)
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{
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krb5_enctype *p;
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int i;
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krb5_error_code ret;
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if(context->etypes) {
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for(i = 0; context->etypes[i]; i++);
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++i;
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ALLOC(p, i);
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if(!p) {
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krb5_set_error_string (context, "malloc: out of memory");
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return ENOMEM;
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}
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memmove(p, context->etypes, i * sizeof(krb5_enctype));
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} else {
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ret = default_etypes(context, &p);
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if (ret)
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return ret;
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}
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*etypes = p;
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return 0;
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}
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const char *
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krb5_get_err_text(krb5_context context, krb5_error_code code)
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{
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const char *p = NULL;
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if(context != NULL)
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p = com_right(context->et_list, code);
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if(p == NULL)
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p = strerror(code);
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if (p == NULL)
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p = "Unknown error";
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return p;
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}
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void
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krb5_init_ets(krb5_context context)
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{
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if(context->et_list == NULL){
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krb5_add_et_list(context, initialize_krb5_error_table_r);
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krb5_add_et_list(context, initialize_asn1_error_table_r);
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krb5_add_et_list(context, initialize_heim_error_table_r);
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krb5_add_et_list(context, initialize_k524_error_table_r);
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}
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}
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void
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krb5_set_use_admin_kdc (krb5_context context, krb5_boolean flag)
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{
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context->use_admin_kdc = flag;
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}
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krb5_boolean
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krb5_get_use_admin_kdc (krb5_context context)
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{
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return context->use_admin_kdc;
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}
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krb5_error_code
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krb5_add_extra_addresses(krb5_context context, krb5_addresses *addresses)
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{
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if(context->extra_addresses)
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return krb5_append_addresses(context,
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context->extra_addresses, addresses);
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else
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return krb5_set_extra_addresses(context, addresses);
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}
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krb5_error_code
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krb5_set_extra_addresses(krb5_context context, const krb5_addresses *addresses)
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{
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if(context->extra_addresses)
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krb5_free_addresses(context, context->extra_addresses);
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if(addresses == NULL) {
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if(context->extra_addresses != NULL) {
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free(context->extra_addresses);
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context->extra_addresses = NULL;
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}
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return 0;
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}
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if(context->extra_addresses == NULL) {
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context->extra_addresses = malloc(sizeof(*context->extra_addresses));
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if(context->extra_addresses == NULL) {
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krb5_set_error_string (context, "malloc: out of memory");
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return ENOMEM;
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}
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}
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return krb5_copy_addresses(context, addresses, context->extra_addresses);
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}
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krb5_error_code
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krb5_get_extra_addresses(krb5_context context, krb5_addresses *addresses)
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{
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if(context->extra_addresses == NULL) {
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memset(addresses, 0, sizeof(*addresses));
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return 0;
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}
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return krb5_copy_addresses(context,context->extra_addresses, addresses);
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}
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krb5_error_code
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krb5_add_ignore_addresses(krb5_context context, krb5_addresses *addresses)
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{
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if(context->ignore_addresses)
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return krb5_append_addresses(context,
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context->ignore_addresses, addresses);
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else
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return krb5_set_ignore_addresses(context, addresses);
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}
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krb5_error_code
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krb5_set_ignore_addresses(krb5_context context, const krb5_addresses *addresses)
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{
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if(context->ignore_addresses)
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krb5_free_addresses(context, context->ignore_addresses);
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if(addresses == NULL) {
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if(context->ignore_addresses != NULL) {
|
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free(context->ignore_addresses);
|
|
context->ignore_addresses = NULL;
|
|
}
|
|
return 0;
|
|
}
|
|
if(context->ignore_addresses == NULL) {
|
|
context->ignore_addresses = malloc(sizeof(*context->ignore_addresses));
|
|
if(context->ignore_addresses == NULL) {
|
|
krb5_set_error_string (context, "malloc: out of memory");
|
|
return ENOMEM;
|
|
}
|
|
}
|
|
return krb5_copy_addresses(context, addresses, context->ignore_addresses);
|
|
}
|
|
|
|
krb5_error_code
|
|
krb5_get_ignore_addresses(krb5_context context, krb5_addresses *addresses)
|
|
{
|
|
if(context->ignore_addresses == NULL) {
|
|
memset(addresses, 0, sizeof(*addresses));
|
|
return 0;
|
|
}
|
|
return krb5_copy_addresses(context, context->ignore_addresses, addresses);
|
|
}
|
|
|
|
krb5_error_code
|
|
krb5_set_fcache_version(krb5_context context, int version)
|
|
{
|
|
context->fcache_vno = version;
|
|
return 0;
|
|
}
|
|
|
|
krb5_error_code
|
|
krb5_get_fcache_version(krb5_context context, int *version)
|
|
{
|
|
*version = context->fcache_vno;
|
|
return 0;
|
|
}
|