784 lines
19 KiB
C
784 lines
19 KiB
C
/*
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* Copyright (c) 1997 - 2006 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 "kadm5_locl.h"
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#include <sys/types.h>
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#include <sys/socket.h>
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#include <netinet/in.h>
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#include <netdb.h>
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RCSID("$Id: init_c.c 21972 2007-10-18 19:11:15Z lha $");
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static void
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set_funcs(kadm5_client_context *c)
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{
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#define SET(C, F) (C)->funcs.F = kadm5 ## _c_ ## F
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SET(c, chpass_principal);
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SET(c, chpass_principal_with_key);
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SET(c, create_principal);
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SET(c, delete_principal);
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SET(c, destroy);
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SET(c, flush);
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SET(c, get_principal);
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SET(c, get_principals);
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SET(c, get_privs);
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SET(c, modify_principal);
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SET(c, randkey_principal);
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SET(c, rename_principal);
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}
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kadm5_ret_t
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_kadm5_c_init_context(kadm5_client_context **ctx,
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kadm5_config_params *params,
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krb5_context context)
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{
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krb5_error_code ret;
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char *colon;
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*ctx = malloc(sizeof(**ctx));
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if(*ctx == NULL)
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return ENOMEM;
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memset(*ctx, 0, sizeof(**ctx));
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krb5_add_et_list (context, initialize_kadm5_error_table_r);
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set_funcs(*ctx);
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(*ctx)->context = context;
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if(params->mask & KADM5_CONFIG_REALM) {
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ret = 0;
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(*ctx)->realm = strdup(params->realm);
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if ((*ctx)->realm == NULL)
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ret = ENOMEM;
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} else
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ret = krb5_get_default_realm((*ctx)->context, &(*ctx)->realm);
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if (ret) {
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free(*ctx);
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return ret;
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}
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if(params->mask & KADM5_CONFIG_ADMIN_SERVER)
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(*ctx)->admin_server = strdup(params->admin_server);
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else {
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char **hostlist;
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ret = krb5_get_krb_admin_hst (context, &(*ctx)->realm, &hostlist);
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if (ret) {
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free((*ctx)->realm);
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free(*ctx);
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return ret;
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}
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(*ctx)->admin_server = strdup(*hostlist);
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krb5_free_krbhst (context, hostlist);
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}
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if ((*ctx)->admin_server == NULL) {
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free((*ctx)->realm);
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free(*ctx);
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return ENOMEM;
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}
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colon = strchr ((*ctx)->admin_server, ':');
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if (colon != NULL)
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*colon++ = '\0';
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(*ctx)->kadmind_port = 0;
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if(params->mask & KADM5_CONFIG_KADMIND_PORT)
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(*ctx)->kadmind_port = params->kadmind_port;
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else if (colon != NULL) {
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char *end;
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(*ctx)->kadmind_port = htons(strtol (colon, &end, 0));
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}
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if ((*ctx)->kadmind_port == 0)
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(*ctx)->kadmind_port = krb5_getportbyname (context, "kerberos-adm",
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"tcp", 749);
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return 0;
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}
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static krb5_error_code
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get_kadm_ticket(krb5_context context,
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krb5_ccache id,
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krb5_principal client,
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const char *server_name)
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{
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krb5_error_code ret;
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krb5_creds in, *out;
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memset(&in, 0, sizeof(in));
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in.client = client;
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ret = krb5_parse_name(context, server_name, &in.server);
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if(ret)
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return ret;
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ret = krb5_get_credentials(context, 0, id, &in, &out);
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if(ret == 0)
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krb5_free_creds(context, out);
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krb5_free_principal(context, in.server);
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return ret;
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}
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static krb5_error_code
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get_new_cache(krb5_context context,
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krb5_principal client,
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const char *password,
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krb5_prompter_fct prompter,
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const char *keytab,
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const char *server_name,
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krb5_ccache *ret_cache)
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{
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krb5_error_code ret;
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krb5_creds cred;
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krb5_get_init_creds_opt *opt;
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krb5_ccache id;
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ret = krb5_get_init_creds_opt_alloc (context, &opt);
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if (ret)
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return ret;
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krb5_get_init_creds_opt_set_default_flags(context, "kadmin",
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krb5_principal_get_realm(context,
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client),
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opt);
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krb5_get_init_creds_opt_set_forwardable (opt, FALSE);
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krb5_get_init_creds_opt_set_proxiable (opt, FALSE);
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if(password == NULL && prompter == NULL) {
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krb5_keytab kt;
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if(keytab == NULL)
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ret = krb5_kt_default(context, &kt);
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else
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ret = krb5_kt_resolve(context, keytab, &kt);
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if(ret) {
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krb5_get_init_creds_opt_free(context, opt);
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return ret;
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}
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ret = krb5_get_init_creds_keytab (context,
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&cred,
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client,
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kt,
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0,
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server_name,
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opt);
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krb5_kt_close(context, kt);
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} else {
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ret = krb5_get_init_creds_password (context,
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&cred,
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client,
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password,
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prompter,
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NULL,
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0,
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server_name,
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opt);
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}
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krb5_get_init_creds_opt_free(context, opt);
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switch(ret){
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case 0:
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break;
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case KRB5_LIBOS_PWDINTR: /* don't print anything if it was just C-c:ed */
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case KRB5KRB_AP_ERR_BAD_INTEGRITY:
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case KRB5KRB_AP_ERR_MODIFIED:
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return KADM5_BAD_PASSWORD;
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default:
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return ret;
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}
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ret = krb5_cc_gen_new(context, &krb5_mcc_ops, &id);
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if(ret)
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return ret;
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ret = krb5_cc_initialize (context, id, cred.client);
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if (ret)
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return ret;
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ret = krb5_cc_store_cred (context, id, &cred);
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if (ret)
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return ret;
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krb5_free_cred_contents (context, &cred);
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*ret_cache = id;
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return 0;
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}
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/*
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* Check the credential cache `id´ to figure out what principal to use
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* when talking to the kadmind. If there is a initial kadmin/admin@
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* credential in the cache, use that client principal. Otherwise, use
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* the client principals first component and add /admin to the
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* principal.
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*/
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static krb5_error_code
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get_cache_principal(krb5_context context,
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krb5_ccache *id,
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krb5_principal *client)
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{
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krb5_error_code ret;
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const char *name, *inst;
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krb5_principal p1, p2;
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ret = krb5_cc_default(context, id);
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if(ret) {
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*id = NULL;
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return ret;
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}
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ret = krb5_cc_get_principal(context, *id, &p1);
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if(ret) {
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krb5_cc_close(context, *id);
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*id = NULL;
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return ret;
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}
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ret = krb5_make_principal(context, &p2, NULL,
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"kadmin", "admin", NULL);
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if (ret) {
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krb5_cc_close(context, *id);
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*id = NULL;
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krb5_free_principal(context, p1);
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return ret;
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}
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{
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krb5_creds in, *out;
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krb5_kdc_flags flags;
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flags.i = 0;
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memset(&in, 0, sizeof(in));
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in.client = p1;
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in.server = p2;
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/* check for initial ticket kadmin/admin */
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ret = krb5_get_credentials_with_flags(context, KRB5_GC_CACHED, flags,
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*id, &in, &out);
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krb5_free_principal(context, p2);
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if (ret == 0) {
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if (out->flags.b.initial) {
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*client = p1;
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krb5_free_creds(context, out);
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return 0;
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}
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krb5_free_creds(context, out);
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}
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}
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krb5_cc_close(context, *id);
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*id = NULL;
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name = krb5_principal_get_comp_string(context, p1, 0);
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inst = krb5_principal_get_comp_string(context, p1, 1);
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if(inst == NULL || strcmp(inst, "admin") != 0) {
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ret = krb5_make_principal(context, &p2, NULL, name, "admin", NULL);
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krb5_free_principal(context, p1);
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if(ret != 0)
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return ret;
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*client = p2;
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return 0;
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}
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*client = p1;
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return 0;
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}
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krb5_error_code
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_kadm5_c_get_cred_cache(krb5_context context,
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const char *client_name,
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const char *server_name,
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const char *password,
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krb5_prompter_fct prompter,
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const char *keytab,
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krb5_ccache ccache,
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krb5_ccache *ret_cache)
|
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{
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krb5_error_code ret;
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krb5_ccache id = NULL;
|
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krb5_principal default_client = NULL, client = NULL;
|
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|
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/* treat empty password as NULL */
|
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if(password && *password == '\0')
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password = NULL;
|
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if(server_name == NULL)
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server_name = KADM5_ADMIN_SERVICE;
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|
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if(client_name != NULL) {
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ret = krb5_parse_name(context, client_name, &client);
|
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if(ret)
|
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return ret;
|
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}
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if(ccache != NULL) {
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id = ccache;
|
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ret = krb5_cc_get_principal(context, id, &client);
|
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if(ret)
|
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return ret;
|
||
} else {
|
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/* get principal from default cache, ok if this doesn't work */
|
||
|
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ret = get_cache_principal(context, &id, &default_client);
|
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if (ret) {
|
||
/*
|
||
* No client was specified by the caller and we cannot
|
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* determine the client from a credentials cache.
|
||
*/
|
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const char *user;
|
||
|
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user = get_default_username ();
|
||
|
||
if(user == NULL) {
|
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krb5_set_error_string(context, "Unable to find local user name");
|
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return KADM5_FAILURE;
|
||
}
|
||
ret = krb5_make_principal(context, &default_client,
|
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NULL, user, "admin", NULL);
|
||
if(ret)
|
||
return ret;
|
||
}
|
||
}
|
||
|
||
|
||
/*
|
||
* No client was specified by the caller, but we have a client
|
||
* from the default credentials cache.
|
||
*/
|
||
if (client == NULL && default_client != NULL)
|
||
client = default_client;
|
||
|
||
|
||
if(id && (default_client == NULL ||
|
||
krb5_principal_compare(context, client, default_client))) {
|
||
ret = get_kadm_ticket(context, id, client, server_name);
|
||
if(ret == 0) {
|
||
*ret_cache = id;
|
||
krb5_free_principal(context, default_client);
|
||
if (default_client != client)
|
||
krb5_free_principal(context, client);
|
||
return 0;
|
||
}
|
||
if(ccache != NULL)
|
||
/* couldn't get ticket from cache */
|
||
return -1;
|
||
}
|
||
/* get creds via AS request */
|
||
if(id && (id != ccache))
|
||
krb5_cc_close(context, id);
|
||
if (client != default_client)
|
||
krb5_free_principal(context, default_client);
|
||
|
||
ret = get_new_cache(context, client, password, prompter, keytab,
|
||
server_name, ret_cache);
|
||
krb5_free_principal(context, client);
|
||
return ret;
|
||
}
|
||
|
||
static kadm5_ret_t
|
||
kadm_connect(kadm5_client_context *ctx)
|
||
{
|
||
kadm5_ret_t ret;
|
||
krb5_principal server;
|
||
krb5_ccache cc;
|
||
int s;
|
||
struct addrinfo *ai, *a;
|
||
struct addrinfo hints;
|
||
int error;
|
||
char portstr[NI_MAXSERV];
|
||
char *hostname, *slash;
|
||
char *service_name;
|
||
krb5_context context = ctx->context;
|
||
|
||
memset (&hints, 0, sizeof(hints));
|
||
hints.ai_socktype = SOCK_STREAM;
|
||
hints.ai_protocol = IPPROTO_TCP;
|
||
|
||
snprintf (portstr, sizeof(portstr), "%u", ntohs(ctx->kadmind_port));
|
||
|
||
hostname = ctx->admin_server;
|
||
slash = strchr (hostname, '/');
|
||
if (slash != NULL)
|
||
hostname = slash + 1;
|
||
|
||
error = getaddrinfo (hostname, portstr, &hints, &ai);
|
||
if (error) {
|
||
krb5_clear_error_string(context);
|
||
return KADM5_BAD_SERVER_NAME;
|
||
}
|
||
|
||
for (a = ai; a != NULL; a = a->ai_next) {
|
||
s = socket (a->ai_family, a->ai_socktype, a->ai_protocol);
|
||
if (s < 0)
|
||
continue;
|
||
if (connect (s, a->ai_addr, a->ai_addrlen) < 0) {
|
||
krb5_clear_error_string(context);
|
||
krb5_warn (context, errno, "connect(%s)", hostname);
|
||
close (s);
|
||
continue;
|
||
}
|
||
break;
|
||
}
|
||
if (a == NULL) {
|
||
freeaddrinfo (ai);
|
||
krb5_clear_error_string(context);
|
||
krb5_warnx (context, "failed to contact %s", hostname);
|
||
return KADM5_FAILURE;
|
||
}
|
||
ret = _kadm5_c_get_cred_cache(context,
|
||
ctx->client_name,
|
||
ctx->service_name,
|
||
NULL, ctx->prompter, ctx->keytab,
|
||
ctx->ccache, &cc);
|
||
|
||
if(ret) {
|
||
freeaddrinfo (ai);
|
||
close(s);
|
||
return ret;
|
||
}
|
||
|
||
if (ctx->realm)
|
||
asprintf(&service_name, "%s@%s", KADM5_ADMIN_SERVICE, ctx->realm);
|
||
else
|
||
asprintf(&service_name, "%s", KADM5_ADMIN_SERVICE);
|
||
|
||
if (service_name == NULL) {
|
||
freeaddrinfo (ai);
|
||
close(s);
|
||
krb5_clear_error_string(context);
|
||
return ENOMEM;
|
||
}
|
||
|
||
ret = krb5_parse_name(context, service_name, &server);
|
||
free(service_name);
|
||
if(ret) {
|
||
freeaddrinfo (ai);
|
||
if(ctx->ccache == NULL)
|
||
krb5_cc_close(context, cc);
|
||
close(s);
|
||
return ret;
|
||
}
|
||
ctx->ac = NULL;
|
||
|
||
ret = krb5_sendauth(context, &ctx->ac, &s,
|
||
KADMIN_APPL_VERSION, NULL,
|
||
server, AP_OPTS_MUTUAL_REQUIRED,
|
||
NULL, NULL, cc, NULL, NULL, NULL);
|
||
if(ret == 0) {
|
||
krb5_data params;
|
||
kadm5_config_params p;
|
||
memset(&p, 0, sizeof(p));
|
||
if(ctx->realm) {
|
||
p.mask |= KADM5_CONFIG_REALM;
|
||
p.realm = ctx->realm;
|
||
}
|
||
ret = _kadm5_marshal_params(context, &p, ¶ms);
|
||
|
||
ret = krb5_write_priv_message(context, ctx->ac, &s, ¶ms);
|
||
krb5_data_free(¶ms);
|
||
if(ret) {
|
||
freeaddrinfo (ai);
|
||
close(s);
|
||
if(ctx->ccache == NULL)
|
||
krb5_cc_close(context, cc);
|
||
return ret;
|
||
}
|
||
} else if(ret == KRB5_SENDAUTH_BADAPPLVERS) {
|
||
close(s);
|
||
|
||
s = socket (a->ai_family, a->ai_socktype, a->ai_protocol);
|
||
if (s < 0) {
|
||
freeaddrinfo (ai);
|
||
krb5_clear_error_string(context);
|
||
return errno;
|
||
}
|
||
if (connect (s, a->ai_addr, a->ai_addrlen) < 0) {
|
||
close (s);
|
||
freeaddrinfo (ai);
|
||
krb5_clear_error_string(context);
|
||
return errno;
|
||
}
|
||
ret = krb5_sendauth(context, &ctx->ac, &s,
|
||
KADMIN_OLD_APPL_VERSION, NULL,
|
||
server, AP_OPTS_MUTUAL_REQUIRED,
|
||
NULL, NULL, cc, NULL, NULL, NULL);
|
||
}
|
||
freeaddrinfo (ai);
|
||
if(ret) {
|
||
close(s);
|
||
return ret;
|
||
}
|
||
|
||
krb5_free_principal(context, server);
|
||
if(ctx->ccache == NULL)
|
||
krb5_cc_close(context, cc);
|
||
ctx->sock = s;
|
||
|
||
return 0;
|
||
}
|
||
|
||
kadm5_ret_t
|
||
_kadm5_connect(void *handle)
|
||
{
|
||
kadm5_client_context *ctx = handle;
|
||
if(ctx->sock == -1)
|
||
return kadm_connect(ctx);
|
||
return 0;
|
||
}
|
||
|
||
static kadm5_ret_t
|
||
kadm5_c_init_with_context(krb5_context context,
|
||
const char *client_name,
|
||
const char *password,
|
||
krb5_prompter_fct prompter,
|
||
const char *keytab,
|
||
krb5_ccache ccache,
|
||
const char *service_name,
|
||
kadm5_config_params *realm_params,
|
||
unsigned long struct_version,
|
||
unsigned long api_version,
|
||
void **server_handle)
|
||
{
|
||
kadm5_ret_t ret;
|
||
kadm5_client_context *ctx;
|
||
krb5_ccache cc;
|
||
|
||
ret = _kadm5_c_init_context(&ctx, realm_params, context);
|
||
if(ret)
|
||
return ret;
|
||
|
||
if(password != NULL && *password != '\0') {
|
||
ret = _kadm5_c_get_cred_cache(context,
|
||
client_name,
|
||
service_name,
|
||
password, prompter, keytab, ccache, &cc);
|
||
if(ret)
|
||
return ret; /* XXX */
|
||
ccache = cc;
|
||
}
|
||
|
||
|
||
if (client_name != NULL)
|
||
ctx->client_name = strdup(client_name);
|
||
else
|
||
ctx->client_name = NULL;
|
||
if (service_name != NULL)
|
||
ctx->service_name = strdup(service_name);
|
||
else
|
||
ctx->service_name = NULL;
|
||
ctx->prompter = prompter;
|
||
ctx->keytab = keytab;
|
||
ctx->ccache = ccache;
|
||
/* maybe we should copy the params here */
|
||
ctx->sock = -1;
|
||
|
||
*server_handle = ctx;
|
||
return 0;
|
||
}
|
||
|
||
static kadm5_ret_t
|
||
init_context(const char *client_name,
|
||
const char *password,
|
||
krb5_prompter_fct prompter,
|
||
const char *keytab,
|
||
krb5_ccache ccache,
|
||
const char *service_name,
|
||
kadm5_config_params *realm_params,
|
||
unsigned long struct_version,
|
||
unsigned long api_version,
|
||
void **server_handle)
|
||
{
|
||
krb5_context context;
|
||
kadm5_ret_t ret;
|
||
kadm5_server_context *ctx;
|
||
|
||
ret = krb5_init_context(&context);
|
||
if (ret)
|
||
return ret;
|
||
ret = kadm5_c_init_with_context(context,
|
||
client_name,
|
||
password,
|
||
prompter,
|
||
keytab,
|
||
ccache,
|
||
service_name,
|
||
realm_params,
|
||
struct_version,
|
||
api_version,
|
||
server_handle);
|
||
if(ret){
|
||
krb5_free_context(context);
|
||
return ret;
|
||
}
|
||
ctx = *server_handle;
|
||
ctx->my_context = 1;
|
||
return 0;
|
||
}
|
||
|
||
kadm5_ret_t
|
||
kadm5_c_init_with_password_ctx(krb5_context context,
|
||
const char *client_name,
|
||
const char *password,
|
||
const char *service_name,
|
||
kadm5_config_params *realm_params,
|
||
unsigned long struct_version,
|
||
unsigned long api_version,
|
||
void **server_handle)
|
||
{
|
||
return kadm5_c_init_with_context(context,
|
||
client_name,
|
||
password,
|
||
krb5_prompter_posix,
|
||
NULL,
|
||
NULL,
|
||
service_name,
|
||
realm_params,
|
||
struct_version,
|
||
api_version,
|
||
server_handle);
|
||
}
|
||
|
||
kadm5_ret_t
|
||
kadm5_c_init_with_password(const char *client_name,
|
||
const char *password,
|
||
const char *service_name,
|
||
kadm5_config_params *realm_params,
|
||
unsigned long struct_version,
|
||
unsigned long api_version,
|
||
void **server_handle)
|
||
{
|
||
return init_context(client_name,
|
||
password,
|
||
krb5_prompter_posix,
|
||
NULL,
|
||
NULL,
|
||
service_name,
|
||
realm_params,
|
||
struct_version,
|
||
api_version,
|
||
server_handle);
|
||
}
|
||
|
||
kadm5_ret_t
|
||
kadm5_c_init_with_skey_ctx(krb5_context context,
|
||
const char *client_name,
|
||
const char *keytab,
|
||
const char *service_name,
|
||
kadm5_config_params *realm_params,
|
||
unsigned long struct_version,
|
||
unsigned long api_version,
|
||
void **server_handle)
|
||
{
|
||
return kadm5_c_init_with_context(context,
|
||
client_name,
|
||
NULL,
|
||
NULL,
|
||
keytab,
|
||
NULL,
|
||
service_name,
|
||
realm_params,
|
||
struct_version,
|
||
api_version,
|
||
server_handle);
|
||
}
|
||
|
||
|
||
kadm5_ret_t
|
||
kadm5_c_init_with_skey(const char *client_name,
|
||
const char *keytab,
|
||
const char *service_name,
|
||
kadm5_config_params *realm_params,
|
||
unsigned long struct_version,
|
||
unsigned long api_version,
|
||
void **server_handle)
|
||
{
|
||
return init_context(client_name,
|
||
NULL,
|
||
NULL,
|
||
keytab,
|
||
NULL,
|
||
service_name,
|
||
realm_params,
|
||
struct_version,
|
||
api_version,
|
||
server_handle);
|
||
}
|
||
|
||
kadm5_ret_t
|
||
kadm5_c_init_with_creds_ctx(krb5_context context,
|
||
const char *client_name,
|
||
krb5_ccache ccache,
|
||
const char *service_name,
|
||
kadm5_config_params *realm_params,
|
||
unsigned long struct_version,
|
||
unsigned long api_version,
|
||
void **server_handle)
|
||
{
|
||
return kadm5_c_init_with_context(context,
|
||
client_name,
|
||
NULL,
|
||
NULL,
|
||
NULL,
|
||
ccache,
|
||
service_name,
|
||
realm_params,
|
||
struct_version,
|
||
api_version,
|
||
server_handle);
|
||
}
|
||
|
||
kadm5_ret_t
|
||
kadm5_c_init_with_creds(const char *client_name,
|
||
krb5_ccache ccache,
|
||
const char *service_name,
|
||
kadm5_config_params *realm_params,
|
||
unsigned long struct_version,
|
||
unsigned long api_version,
|
||
void **server_handle)
|
||
{
|
||
return init_context(client_name,
|
||
NULL,
|
||
NULL,
|
||
NULL,
|
||
ccache,
|
||
service_name,
|
||
realm_params,
|
||
struct_version,
|
||
api_version,
|
||
server_handle);
|
||
}
|
||
|
||
#if 0
|
||
kadm5_ret_t
|
||
kadm5_init(char *client_name, char *pass,
|
||
char *service_name,
|
||
kadm5_config_params *realm_params,
|
||
unsigned long struct_version,
|
||
unsigned long api_version,
|
||
void **server_handle)
|
||
{
|
||
}
|
||
#endif
|
||
|