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/*
* Copyright (c) 1998, 2010, Oracle and/or its affiliates. All rights reserved.
*/
/*
* lib/kad5/kadm_host_srv_names.c
*/
#include <k5-int.h>
#include "admin.h"
#include <stdio.h>
#include <os-proto.h>
#define KADM5_MASTER "admin_server"
#define KADM5_KPASSWD "kpasswd_server"
/*
* Find the admin server for the given realm. If the realm is null or
* the empty string, find the admin server for the default realm.
* Returns 0 on succsess (KADM5_OK). It is the callers responsibility to
* free the storage allocated to the admin server, master.
*/
kadm5_ret_t
kadm5_get_master(krb5_context context, const char *realm, char **master)
{
/* Solaris Kerberos */
char *def_realm = NULL;
char *delim;
#ifdef KRB5_DNS_LOOKUP
struct sockaddr *addrs;
int naddrs;
unsigned short dns_portno;
char dns_host[MAX_DNS_NAMELEN];
krb5_data dns_realm;
krb5_error_code dns_ret = 1;
#endif /* KRB5_DNS_LOOKUP */
if (realm == 0 || *realm == '\0')
krb5_get_default_realm(context, &def_realm);
(void) profile_get_string(context->profile, "realms",
realm ? realm : def_realm,
KADM5_MASTER, 0, master);
if ((*master != NULL) && ((delim = strchr(*master, ':')) != NULL))
*delim = '\0';
#ifdef KRB5_DNS_LOOKUP
if (*master == NULL) {
/*
* Initialize realm info for (possible) DNS lookups.
*/
dns_realm.data = strdup(realm ? realm : def_realm);
dns_realm.length = strlen(realm ? realm : def_realm);
dns_realm.magic = 0;
dns_ret = krb5_get_servername(context, &dns_realm,
"_kerberos-adm", "_udp",
dns_host, &dns_portno);
if (dns_ret == 0)
*master = strdup(dns_host);
if (dns_realm.data)
free(dns_realm.data);
}
#endif /* KRB5_DNS_LOOKUP */
/* Solaris Kerberos */
if (def_realm != NULL)
krb5_free_default_realm(context, def_realm);
return (*master ? KADM5_OK : KADM5_NO_SRV);
}
/*
* Find the kpasswd server for the given realm. If the realm is null or
* the empty string, find the admin server for the default realm.
* Returns 0 on succsess (KADM5_OK). It is the callers responsibility to
* free the storage allocated to the admin server, master.
*/
kadm5_ret_t
kadm5_get_kpasswd(krb5_context context, const char *realm, char **kpasswd)
{
char *def_realm = NULL;
char *delim;
#ifdef KRB5_DNS_LOOKUP
struct sockaddr *addrs;
int naddrs;
unsigned short dns_portno;
char dns_host[MAX_DNS_NAMELEN];
krb5_data dns_realm;
krb5_error_code dns_ret = 1, ret;
#endif /* KRB5_DNS_LOOKUP */
if (realm == 0 || *realm == '\0') {
ret = krb5_get_default_realm(context, &def_realm);
if (ret != 0)
return (ret);
}
(void) profile_get_string(context->profile, "realms",
realm ? realm : def_realm,
KADM5_KPASSWD, 0, kpasswd);
if ((*kpasswd != NULL) && ((delim = strchr(*kpasswd, ':')) != NULL))
*delim = '\0';
#ifdef KRB5_DNS_LOOKUP
if (*kpasswd == NULL) {
/*
* Initialize realm info for (possible) DNS lookups.
*/
dns_realm.data = strdup(realm ? realm : def_realm);
if (dns_realm.data == NULL) {
if (def_realm != NULL)
free(def_realm);
return (ENOMEM);
}
dns_realm.length = strlen(realm ? realm : def_realm);
dns_realm.magic = 0;
dns_ret = krb5_get_servername(context, &dns_realm,
"_kpasswd", "_tcp",
dns_host, &dns_portno);
if (dns_ret == 0) {
*kpasswd = strdup(dns_host);
if (*kpasswd == NULL) {
free(dns_realm.data);
if (def_realm != NULL)
free(def_realm);
return (ENOMEM);
}
}
free(dns_realm.data);
}
#endif /* KRB5_DNS_LOOKUP */
if (def_realm != NULL)
free(def_realm);
return (*kpasswd ? KADM5_OK : KADM5_NO_SRV);
}
/*
* Get the host base service name for the admin principal. Returns
* KADM5_OK on success. Caller must free the storage allocated for
* host_service_name.
*/
kadm5_ret_t
kadm5_get_adm_host_srv_name(krb5_context context,
const char *realm, char **host_service_name)
{
kadm5_ret_t ret;
char *name;
char *host;
if (ret = kadm5_get_master(context, realm, &host))
return (ret);
name = malloc(strlen(KADM5_ADMIN_HOST_SERVICE)+ strlen(host) + 2);
if (name == NULL) {
free(host);
return (ENOMEM);
}
sprintf(name, "%s@%s", KADM5_ADMIN_HOST_SERVICE, host);
free(host);
*host_service_name = name;
return (KADM5_OK);
}
/*
* Get the host base service name for the changepw principal. Returns
* KADM5_OK on success. Caller must free the storage allocated for
* host_service_name.
*/
kadm5_ret_t
kadm5_get_cpw_host_srv_name(krb5_context context,
const char *realm, char **host_service_name)
{
kadm5_ret_t ret;
char *name;
char *host;
/*
* First try to find the kpasswd server, after all we are about to
* try to change our password. If this fails then try admin_server.
*/
if (ret = kadm5_get_kpasswd(context, realm, &host)) {
if (ret = kadm5_get_master(context, realm, &host))
return (ret);
}
name = malloc(strlen(KADM5_CHANGEPW_HOST_SERVICE) + strlen(host) + 2);
if (name == NULL) {
free(host);
return (ENOMEM);
}
sprintf(name, "%s@%s", KADM5_CHANGEPW_HOST_SERVICE, host);
free(host);
*host_service_name = name;
return (KADM5_OK);
}
/*
* Get the host base service name for the kiprop principal. Returns
* KADM5_OK on success. Caller must free the storage allocated
* for host_service_name.
*/
kadm5_ret_t kadm5_get_kiprop_host_srv_name(krb5_context context,
const char *realm,
char **host_service_name) {
kadm5_ret_t ret;
char *name;
char *host;
if (ret = kadm5_get_master(context, realm, &host))
return (ret);
name = malloc(strlen(KADM5_KIPROP_HOST_SERVICE) + strlen(host) + 2);
if (name == NULL) {
free(host);
return (ENOMEM);
}
sprintf(name, "%s@%s", KADM5_KIPROP_HOST_SERVICE, host);
free(host);
*host_service_name = name;
return (KADM5_OK);
}
/*
* Solaris Kerberos:
* Try to determine if this is the master KDC for a given realm
*/
kadm5_ret_t kadm5_is_master(krb5_context context, const char *realm,
krb5_boolean *is_master) {
kadm5_ret_t ret;
char *admin_host = NULL;
krb5_address **tmp_addr, **master_addr = NULL;
krb5_address **local_addr = NULL;
if (is_master)
*is_master = FALSE;
else
return (KADM5_FAILURE);
/* Locate the master KDC */
if (ret = kadm5_get_master(context, realm, &admin_host))
return (ret);
if (ret = krb5_os_hostaddr(context, admin_host, &master_addr)) {
free(admin_host);
return (ret);
}
/* Get the local addresses */
if (ret = krb5_os_localaddr(context, &local_addr)) {
krb5_free_addresses(context, master_addr);
free(admin_host);
return (ret);
}
/* Compare them */
for (tmp_addr = master_addr; *tmp_addr; tmp_addr++) {
if (krb5_address_search(context, *tmp_addr, local_addr)) {
*is_master = TRUE;
break;
}
}
krb5_free_addresses(context, local_addr);
krb5_free_addresses(context, master_addr);
free(admin_host);
return (KADM5_OK);
}
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