/*
* Copyright (c) 1997-2005 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 "ktutil_locl.h"
RCSID("$Id$");
static krb5_error_code
change_entry (krb5_keytab keytab,
krb5_principal principal, krb5_kvno kvno,
const char *realm, const char *admin_server, int server_port)
{
krb5_error_code ret;
kadm5_config_params conf;
void *kadm_handle;
char *client_name;
krb5_keyblock *keys;
int num_keys;
int i;
ret = krb5_unparse_name (context, principal, &client_name);
if (ret) {
krb5_warn (context, ret, "krb5_unparse_name");
return ret;
}
memset (&conf, 0, sizeof(conf));
if(realm == NULL)
realm = krb5_principal_get_realm(context, principal);
conf.realm = strdup(realm);
if (conf.realm == NULL) {
free (client_name);
krb5_set_error_message(context, ENOMEM, "malloc failed");
return ENOMEM;
}
conf.mask |= KADM5_CONFIG_REALM;
if (admin_server) {
conf.admin_server = strdup(admin_server);
if (conf.admin_server == NULL) {
free(client_name);
free(conf.realm);
krb5_set_error_message(context, ENOMEM, "malloc failed");
return ENOMEM;
}
conf.mask |= KADM5_CONFIG_ADMIN_SERVER;
}
if (server_port) {
conf.kadmind_port = htons(server_port);
conf.mask |= KADM5_CONFIG_KADMIND_PORT;
}
ret = kadm5_init_with_skey_ctx (context,
client_name,
keytab_string,
KADM5_ADMIN_SERVICE,
&conf, 0, 0,
&kadm_handle);
free(conf.admin_server);
free(conf.realm);
if (ret) {
krb5_warn (context, ret,
"kadm5_c_init_with_skey_ctx: %s:", client_name);
free (client_name);
return ret;
}
ret = kadm5_randkey_principal (kadm_handle, principal, &keys, &num_keys);
kadm5_destroy (kadm_handle);
if (ret) {
krb5_warn(context, ret, "kadm5_randkey_principal: %s:", client_name);
free (client_name);
return ret;
}
free (client_name);
for (i = 0; i < num_keys; ++i) {
krb5_keytab_entry new_entry;
new_entry.principal = principal;
new_entry.timestamp = time (NULL);
new_entry.vno = kvno + 1;
new_entry.keyblock = keys[i];
ret = krb5_kt_add_entry (context, keytab, &new_entry);
if (ret)
krb5_warn (context, ret, "krb5_kt_add_entry");
krb5_free_keyblock_contents (context, &keys[i]);
}
return ret;
}
/*
* loop over all the entries in the keytab (or those given) and change
* their keys, writing the new keys
*/
struct change_set {
krb5_principal principal;
krb5_kvno kvno;
};
int
kt_change (struct change_options *opt, int argc, char **argv)
{
krb5_error_code ret;
krb5_keytab keytab;
krb5_kt_cursor cursor;
krb5_keytab_entry entry;
int i, j, max;
struct change_set *changeset;
int errors = 0;
if((keytab = ktutil_open_keytab()) == NULL)
return 1;
j = 0;
max = 0;
changeset = NULL;
ret = krb5_kt_start_seq_get(context, keytab, &cursor);
if(ret){
krb5_warn(context, ret, "%s", keytab_string);
goto out;
}
while((ret = krb5_kt_next_entry(context, keytab, &entry, &cursor)) == 0) {
int add = 0;
for (i = 0; i < j; ++i) {
if (krb5_principal_compare (context, changeset[i].principal,
entry.principal)) {
if (changeset[i].kvno < entry.vno)
changeset[i].kvno = entry.vno;
break;
}
}
if (i < j) {
krb5_kt_free_entry (context, &entry);
continue;
}
if (argc == 0) {
add = 1;
} else {
for (i = 0; i < argc; ++i) {
krb5_principal princ;
ret = krb5_parse_name (context, argv[i], &princ);
if (ret) {
krb5_warn (context, ret, "%s", argv[i]);
continue;
}
if (krb5_principal_compare (context, princ, entry.principal))
add = 1;
krb5_free_principal (context, princ);
}
}
if (add) {
if (j >= max) {
void *tmp;
max = max(max * 2, 1);
tmp = realloc (changeset, max * sizeof(*changeset));
if (tmp == NULL) {
krb5_kt_free_entry (context, &entry);
krb5_warnx (context, "realloc: out of memory");
ret = ENOMEM;
break;
}
changeset = tmp;
}
ret = krb5_copy_principal (context, entry.principal,
&changeset[j].principal);
if (ret) {
krb5_warn (context, ret, "krb5_copy_principal");
krb5_kt_free_entry (context, &entry);
break;
}
changeset[j].kvno = entry.vno;
++j;
}
krb5_kt_free_entry (context, &entry);
}
krb5_kt_end_seq_get(context, keytab, &cursor);
if (ret == KRB5_KT_END) {
ret = 0;
for (i = 0; i < j; i++) {
if (verbose_flag) {
char *client_name;
ret = krb5_unparse_name (context, changeset[i].principal,
&client_name);
if (ret) {
krb5_warn (context, ret, "krb5_unparse_name");
} else {
printf("Changing %s kvno %d\n",
client_name, changeset[i].kvno);
free(client_name);
}
}
ret = change_entry (keytab,
changeset[i].principal, changeset[i].kvno,
opt->realm_string,
opt->admin_server_string,
opt->server_port_integer);
if (ret != 0)
errors = 1;
}
} else
errors = 1;
for (i = 0; i < j; i++)
krb5_free_principal (context, changeset[i].principal);
free (changeset);
out:
krb5_kt_close(context, keytab);
return errors;
}