/* $NetBSD: kpasswdd.c,v 1.4 2017/01/28 21:31:45 christos Exp $ */
/*
* 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 "kpasswd_locl.h"
__RCSID("$NetBSD: kpasswdd.c,v 1.4 2017/01/28 21:31:45 christos Exp $");
#include <kadm5/admin.h>
#ifdef HAVE_SYS_UN_H
#include <sys/un.h>
#endif
#include <krb5/hdb.h>
#include <kadm5/private.h>
static krb5_context context;
static krb5_log_facility *log_facility;
static struct getarg_strings addresses_str;
krb5_addresses explicit_addresses;
static sig_atomic_t exit_flag = 0;
static void
add_one_address (const char *str, int first)
{
krb5_error_code ret;
krb5_addresses tmp;
ret = krb5_parse_address (context, str, &tmp);
if (ret)
krb5_err (context, 1, ret, "parse_address `%s'", str);
if (first)
krb5_copy_addresses(context, &tmp, &explicit_addresses);
else
krb5_append_addresses(context, &explicit_addresses, &tmp);
krb5_free_addresses (context, &tmp);
}
static void
send_reply (int s,
struct sockaddr *sa,
int sa_size,
krb5_data *ap_rep,
krb5_data *rest)
{
struct msghdr msghdr;
struct iovec iov[3];
uint16_t len, ap_rep_len;
u_char header[6];
u_char *p;
if (ap_rep)
ap_rep_len = ap_rep->length;
else
ap_rep_len = 0;
len = 6 + ap_rep_len + rest->length;
p = header;
*p++ = (len >> 8) & 0xFF;
*p++ = (len >> 0) & 0xFF;
*p++ = 0;
*p++ = 1;
*p++ = (ap_rep_len >> 8) & 0xFF;
*p++ = (ap_rep_len >> 0) & 0xFF;
memset (&msghdr, 0, sizeof(msghdr));
msghdr.msg_name = (void *)sa;
msghdr.msg_namelen = sa_size;
msghdr.msg_iov = iov;
msghdr.msg_iovlen = sizeof(iov)/sizeof(*iov);
#if 0
msghdr.msg_control = NULL;
msghdr.msg_controllen = 0;
#endif
iov[0].iov_base = (char *)header;
iov[0].iov_len = 6;
if (ap_rep_len) {
iov[1].iov_base = ap_rep->data;
iov[1].iov_len = ap_rep->length;
} else {
iov[1].iov_base = NULL;
iov[1].iov_len = 0;
}
iov[2].iov_base = rest->data;
iov[2].iov_len = rest->length;
if (sendmsg (s, &msghdr, 0) < 0)
krb5_warn (context, errno, "sendmsg");
}
static int
make_result (krb5_data *data,
uint16_t result_code,
const char *expl)
{
krb5_error_code ret;
krb5_storage *sp;
sp = krb5_storage_emem();
if (sp == NULL) goto out;
ret = krb5_store_uint16(sp, result_code);
if (ret) goto out;
ret = krb5_store_stringz(sp, expl);
if (ret) goto out;
ret = krb5_storage_to_data(sp, data);
if (ret) goto out;
krb5_storage_free(sp);
return 0;
out:
if (sp)
krb5_storage_free(sp);
krb5_warnx (context, "Out of memory generating error reply");
return 1;
}
static void
reply_error (krb5_realm realm,
int s,
struct sockaddr *sa,
int sa_size,
krb5_error_code error_code,
uint16_t result_code,
const char *expl)
{
krb5_error_code ret;
krb5_data error_data;
krb5_data e_data;
krb5_principal server = NULL;
if (make_result(&e_data, result_code, expl))
return;
if (realm) {
ret = krb5_make_principal (context, &server, realm,
"kadmin", "changepw", NULL);
if (ret) {
krb5_data_free (&e_data);
return;
}
}
ret = krb5_mk_error (context,
error_code,
NULL,
&e_data,
NULL,
server,
NULL,
NULL,
&error_data);
if (server)
krb5_free_principal(context, server);
krb5_data_free (&e_data);
if (ret) {
krb5_warn (context, ret, "Could not even generate error reply");
return;
}
send_reply (s, sa, sa_size, NULL, &error_data);
krb5_data_free (&error_data);
}
static void
reply_priv (krb5_auth_context auth_context,
int s,
struct sockaddr *sa,
int sa_size,
uint16_t result_code,
const char *expl)
{
krb5_error_code ret;
krb5_data krb_priv_data;
krb5_data ap_rep_data;
krb5_data e_data;
ret = krb5_mk_rep (context,
auth_context,
&ap_rep_data);
if (ret) {
krb5_warn (context, ret, "Could not even generate error reply");
return;
}
if (make_result(&e_data, result_code, expl))
return;
ret = krb5_mk_priv (context,
auth_context,
&e_data,
&krb_priv_data,
NULL);
krb5_data_free (&e_data);
if (ret) {
krb5_warn (context, ret, "Could not even generate error reply");
return;
}
send_reply (s, sa, sa_size, &ap_rep_data, &krb_priv_data);
krb5_data_free (&ap_rep_data);
krb5_data_free (&krb_priv_data);
}
/*
* Change the password for `principal', sending the reply back on `s'
* (`sa', `sa_size') to `pwd_data'.
*/
static void
change (krb5_auth_context auth_context,
krb5_principal admin_principal,
uint16_t version,
int s,
struct sockaddr *sa,
int sa_size,
krb5_data *in_data)
{
krb5_error_code ret;
char *client = NULL, *admin = NULL;
const char *pwd_reason;
kadm5_config_params conf;
void *kadm5_handle = NULL;
krb5_principal principal = NULL;
krb5_data *pwd_data = NULL;
char *tmp;
ChangePasswdDataMS chpw;
memset (&conf, 0, sizeof(conf));
memset(&chpw, 0, sizeof(chpw));
if (version == KRB5_KPASSWD_VERS_CHANGEPW) {
ret = krb5_copy_data(context, in_data, &pwd_data);
if (ret) {
krb5_warn (context, ret, "krb5_copy_data");
reply_priv (auth_context, s, sa, sa_size, KRB5_KPASSWD_MALFORMED,
"out out memory copying password");
return;
}
principal = admin_principal;
} else if (version == KRB5_KPASSWD_VERS_SETPW) {
size_t len;
ret = decode_ChangePasswdDataMS(in_data->data, in_data->length,
&chpw, &len);
if (ret) {
krb5_warn (context, ret, "decode_ChangePasswdDataMS");
reply_priv (auth_context, s, sa, sa_size, KRB5_KPASSWD_MALFORMED,
"malformed ChangePasswdData");
return;
}
ret = krb5_copy_data(context, &chpw.newpasswd, &pwd_data);
if (ret) {
krb5_warn (context, ret, "krb5_copy_data");
reply_priv (auth_context, s, sa, sa_size, KRB5_KPASSWD_MALFORMED,
"out out memory copying password");
goto out;
}
if (chpw.targname == NULL && chpw.targrealm != NULL) {
krb5_warn (context, ret, "kadm5_init_with_password_ctx");
reply_priv (auth_context, s, sa, sa_size,
KRB5_KPASSWD_MALFORMED,
"targrealm but not targname");
goto out;
}
if (chpw.targname) {
krb5_principal_data princ;
memset(&princ, 0, sizeof (princ));
princ.name = *chpw.targname;
princ.realm = *chpw.targrealm;
if (princ.realm == NULL) {
ret = krb5_get_default_realm(context, &princ.realm);
if (ret) {
krb5_warnx (context,
"kadm5_init_with_password_ctx: "
"failed to allocate realm");
reply_priv (auth_context, s, sa, sa_size,
KRB5_KPASSWD_SOFTERROR,
"failed to allocate realm");
goto out;
}
}
ret = krb5_copy_principal(context, &princ, &principal);
if (*chpw.targrealm == NULL)
free(princ.realm);
if (ret) {
krb5_warn(context, ret, "krb5_copy_principal");
reply_priv(auth_context, s, sa, sa_size,
KRB5_KPASSWD_HARDERROR,
"failed to allocate principal");
goto out;
}
} else
principal = admin_principal;
} else {
krb5_warnx (context, "kadm5_init_with_password_ctx: unknown proto");
reply_priv (auth_context, s, sa, sa_size,
KRB5_KPASSWD_HARDERROR,
"Unknown protocol used");
return;
}
ret = krb5_unparse_name (context, admin_principal, &admin);
if (ret) {
krb5_warn (context, ret, "unparse_name failed");
reply_priv (auth_context, s, sa, sa_size,
KRB5_KPASSWD_HARDERROR, "out of memory error");
goto out;
}
conf.realm = principal->realm;
conf.mask |= KADM5_CONFIG_REALM;
ret = kadm5_init_with_password_ctx(context,
admin,
NULL,
KADM5_ADMIN_SERVICE,
&conf, 0, 0,
&kadm5_handle);
if (ret) {
krb5_warn (context, ret, "kadm5_init_with_password_ctx");
reply_priv (auth_context, s, sa, sa_size, 2,
"Internal error");
goto out;
}
ret = krb5_unparse_name(context, principal, &client);
if (ret) {
krb5_warn (context, ret, "unparse_name failed");
reply_priv (auth_context, s, sa, sa_size,
KRB5_KPASSWD_HARDERROR, "out of memory error");
goto out;
}
/*
* Check password quality if not changing as administrator
*/
if (krb5_principal_compare(context, admin_principal, principal) == TRUE) {
pwd_reason = kadm5_check_password_quality (context, principal,
pwd_data);
if (pwd_reason != NULL ) {
krb5_warnx (context,
"%s didn't pass password quality check with error: %s",
client, pwd_reason);
reply_priv (auth_context, s, sa, sa_size,
KRB5_KPASSWD_SOFTERROR, pwd_reason);
goto out;
}
krb5_warnx (context, "Changing password for %s", client);
} else {
ret = _kadm5_acl_check_permission(kadm5_handle, KADM5_PRIV_CPW,
principal);
if (ret) {
krb5_warn (context, ret,
"Check ACL failed for %s for changing %s password",
admin, client);
reply_priv (auth_context, s, sa, sa_size,
KRB5_KPASSWD_HARDERROR, "permission denied");
goto out;
}
krb5_warnx (context, "%s is changing password for %s", admin, client);
}
ret = krb5_data_realloc(pwd_data, pwd_data->length + 1);
if (ret) {
krb5_warn (context, ret, "malloc: out of memory");
reply_priv (auth_context, s, sa, sa_size, KRB5_KPASSWD_HARDERROR,
"Internal error");
goto out;
}
tmp = pwd_data->data;
tmp[pwd_data->length - 1] = '\0';
ret = kadm5_s_chpass_principal_cond (kadm5_handle, principal, 1, tmp);
krb5_free_data (context, pwd_data);
pwd_data = NULL;
if (ret) {
const char *str = krb5_get_error_message(context, ret);
krb5_warnx(context, "kadm5_s_chpass_principal_cond: %s", str);
reply_priv (auth_context, s, sa, sa_size, KRB5_KPASSWD_SOFTERROR,
str ? str : "Internal error");
krb5_free_error_message(context, str);
goto out;
}
reply_priv (auth_context, s, sa, sa_size, KRB5_KPASSWD_SUCCESS,
"Password changed");
out:
free_ChangePasswdDataMS(&chpw);
if (principal != admin_principal)
krb5_free_principal(context, principal);
if (admin)
free(admin);
if (client)
free(client);
if (pwd_data)
krb5_free_data(context, pwd_data);
if (kadm5_handle)
kadm5_destroy (kadm5_handle);
}
static int
verify (krb5_auth_context *auth_context,
krb5_keytab keytab,
krb5_ticket **ticket,
krb5_data *out_data,
uint16_t *version,
int s,
struct sockaddr *sa,
int sa_size,
u_char *msg,
size_t len,
krb5_address *client_addr)
{
krb5_error_code ret;
uint16_t pkt_len, pkt_ver, ap_req_len;
krb5_data ap_req_data;
krb5_data krb_priv_data;
krb5_const_realm client_realm;
krb5_principal sprinc;
int same;
/*
* Only send an error reply if the request passes basic length
* verification. Otherwise, kpasswdd would reply to every UDP packet,
* allowing an attacker to set up a ping-pong DoS attack via a spoofed UDP
* packet with a source address of another UDP service that also replies
* to every packet.
*
* Also suppress the error reply if ap_req_len is 0, which indicates
* either an invalid request or an error packet. An error packet may be
* the result of a ping-pong attacker pointing us at another kpasswdd.
*/
pkt_len = (msg[0] << 8) | (msg[1]);
pkt_ver = (msg[2] << 8) | (msg[3]);
ap_req_len = (msg[4] << 8) | (msg[5]);
if (pkt_len != len) {
krb5_warnx (context, "Strange len: %ld != %ld",
(long)pkt_len, (long)len);
return 1;
}
if (ap_req_len == 0) {
krb5_warnx (context, "Request is error packet (ap_req_len == 0)");
return 1;
}
if (pkt_ver != KRB5_KPASSWD_VERS_CHANGEPW &&
pkt_ver != KRB5_KPASSWD_VERS_SETPW) {
krb5_warnx (context, "Bad version (%d)", pkt_ver);
reply_error (NULL, s, sa, sa_size, 0, 1, "Wrong program version");
return 1;
}
*version = pkt_ver;
ap_req_data.data = msg + 6;
ap_req_data.length = ap_req_len;
ret = krb5_rd_req (context,
auth_context,
&ap_req_data,
NULL,
keytab,
NULL,
ticket);
if (ret) {
krb5_warn (context, ret, "krb5_rd_req");
reply_error (NULL, s, sa, sa_size, ret, 3, "Authentication failed");
return 1;
}
if (!(*ticket)->ticket.flags.initial) {
krb5_warnx(context, "initial flag not set");
reply_error((*ticket)->server->realm, s, sa, sa_size, ret, 1,
"Bad request");
goto out;
}
/*
* The service principal must be kadmin/changepw@CLIENT-REALM, there
* is no reason to require the KDC's default realm(s) to be the same
* as the realm(s) it serves. The only potential issue is when a KDC
* is a master for realm A and a slave for realm B, in which case it
* should not accept requests to change passwords for realm B, these
* should be sent to realm B's master. This same issue is present in
* the checks that only accepted local realms, there is no new risk.
*/
client_realm = krb5_principal_get_realm(context, (*ticket)->client);
ret = krb5_make_principal(context, &sprinc, client_realm,
"kadmin", "changepw", NULL);
if (ret)
goto out;
same = krb5_principal_compare(context, sprinc, (*ticket)->server);
krb5_free_principal(context, sprinc);
if (!same) {
char *sname;
if (krb5_unparse_name(context, (*ticket)->server, &sname) != 0)
sname = NULL;
krb5_warnx(context, "Invalid kpasswd service principal %s",
sname ? sname : "<enomem>");
free(sname);
reply_error(NULL, s, sa, sa_size, ret, 1, "Bad request");
goto out;
}
krb_priv_data.data = msg + 6 + ap_req_len;
krb_priv_data.length = len - 6 - ap_req_len;
/*
* Only enforce client addresses on on tickets with addresses. If
* its addressless, we are guessing its behind NAT and really
* can't know this information.
*/
if ((*ticket)->ticket.caddr && (*ticket)->ticket.caddr->len > 0) {
ret = krb5_auth_con_setaddrs (context, *auth_context,
NULL, client_addr);
if (ret) {
krb5_warn (context, ret, "krb5_auth_con_setaddr(this)");
goto out;
}
}
ret = krb5_rd_priv (context,
*auth_context,
&krb_priv_data,
out_data,
NULL);
if (ret) {
krb5_warn (context, ret, "krb5_rd_priv");
reply_error ((*ticket)->server->realm, s, sa, sa_size, ret, 3,
"Bad request");
goto out;
}
return 0;
out:
krb5_free_ticket (context, *ticket);
ticket = NULL;
return 1;
}
static void
process (krb5_keytab keytab,
int s,
krb5_address *this_addr,
struct sockaddr *sa,
int sa_size,
u_char *msg,
int len)
{
krb5_error_code ret;
krb5_auth_context auth_context = NULL;
krb5_data out_data;
krb5_ticket *ticket;
krb5_address other_addr;
uint16_t version;
memset(&other_addr, 0, sizeof(other_addr));
krb5_data_zero (&out_data);
ret = krb5_auth_con_init (context, &auth_context);
if (ret) {
krb5_warn (context, ret, "krb5_auth_con_init");
return;
}
krb5_auth_con_setflags (context, auth_context,
KRB5_AUTH_CONTEXT_DO_SEQUENCE);
ret = krb5_sockaddr2address (context, sa, &other_addr);
if (ret) {
krb5_warn (context, ret, "krb5_sockaddr2address");
goto out;
}
ret = krb5_auth_con_setaddrs (context, auth_context, this_addr, NULL);
if (ret) {
krb5_warn (context, ret, "krb5_auth_con_setaddr(this)");
goto out;
}
if (verify (&auth_context, keytab, &ticket, &out_data,
&version, s, sa, sa_size, msg, len, &other_addr) == 0)
{
/*
* We always set the client_addr, to assume that the client
* can ignore it if it choose to do so (just the server does
* so for addressless tickets).
*/
ret = krb5_auth_con_setaddrs (context, auth_context,
this_addr, &other_addr);
if (ret) {
krb5_warn (context, ret, "krb5_auth_con_setaddr(other)");
goto out;
}
change (auth_context,
ticket->client,
version,
s,
sa, sa_size,
&out_data);
memset (out_data.data, 0, out_data.length);
krb5_free_ticket (context, ticket);
}
out:
krb5_free_address(context, &other_addr);
krb5_data_free(&out_data);
krb5_auth_con_free(context, auth_context);
}
#ifdef INETD_SUPPORT
/*
* XXX this code relies on getsockname() returning a valid local
* address for a "connected" DGRAM socket. This is true for most, but
* probably not all systems. For some systems, this could be done
* cleaner by using the IP_RECVDSTADDR option + recvmsg().
*/
static int
get_local_addr(struct sockaddr *remote, int remlen,
struct sockaddr *local, socklen_t *loclen)
{
int s, ret;
s = socket(remote->sa_family, SOCK_DGRAM, 0);
if (s < 0)
return -1;
if (connect(s, remote, remlen) < 0) {
close(s);
return -1;
}
ret = getsockname(s, local, loclen);
close(s);
return ret;
}
#endif
static const char *check_library = NULL;
static const char *check_function = NULL;
static getarg_strings policy_libraries = { 0, NULL };
static char sHDB[] = "HDBGET:";
static char *keytab_str = sHDB;
static char *realm_str;
static int version_flag;
static int help_flag;
static int detach_from_console;
static int daemon_child = -1;
static char *port_str;
static char *config_file;
struct getargs args[] = {
#ifdef HAVE_DLOPEN
{ "check-library", 0, arg_string, &check_library,
"library to load password check function from", "library" },
{ "check-function", 0, arg_string, &check_function,
"password check function to load", "function" },
{ "policy-libraries", 0, arg_strings, &policy_libraries,
"password check function to load", "function" },
#endif
{ "addresses", 0, arg_strings, &addresses_str,
"addresses to listen on", "list of addresses" },
{ "detach", 0, arg_flag, &detach_from_console,
"detach from console", NULL },
{ "daemon-child", 0 , arg_integer, &daemon_child,
"private argument, do not use", NULL },
{ "keytab", 'k', arg_string, &keytab_str,
"keytab to get authentication key from", "kspec" },
{ "config-file", 'c', arg_string, &config_file, NULL, NULL },
{ "realm", 'r', arg_string, &realm_str, "default realm", "realm" },
{ "port", 'p', arg_string, &port_str, "port", NULL },
{ "version", 0, arg_flag, &version_flag, NULL, NULL },
{ "help", 0, arg_flag, &help_flag, NULL, NULL }
};
int num_args = sizeof(args) / sizeof(args[0]);
static int
doit(krb5_keytab keytab, int port)
{
krb5_error_code ret;
int *sockets;
int maxfd;
krb5_addresses addrs;
krb5_address *my_addrp;
unsigned n, i;
fd_set real_fdset;
struct sockaddr_storage __ss;
struct sockaddr *sa = (struct sockaddr *)&__ss;
#ifdef INETD_SUPPORT
int fdz;
int from_inetd;
socklen_t fromlen;
krb5_address my_addr;
struct sockaddr_storage __local;
struct sockaddr *localsa = (struct sockaddr *)&__local;
#endif
#ifdef INETD_SUPPORT
fromlen = sizeof __ss;
from_inetd = (getsockname(0, sa, &fromlen) == 0);
if (!from_inetd) {
#endif
if (explicit_addresses.len) {
addrs = explicit_addresses;
} else {
ret = krb5_get_all_server_addrs(context, &addrs);
if (ret)
krb5_err(context, 1, ret, "krb5_get_all_server_addrs");
}
n = addrs.len;
sockets = malloc(n * sizeof(*sockets));
if (sockets == NULL)
krb5_errx(context, 1, "out of memory");
maxfd = -1;
FD_ZERO(&real_fdset);
for (i = 0; i < n; ++i) {
krb5_socklen_t sa_size = sizeof(__ss);
krb5_addr2sockaddr(context, &addrs.val[i], sa, &sa_size, port);
sockets[i] = socket(__ss.ss_family, SOCK_DGRAM, 0);
if (sockets[i] < 0)
krb5_err(context, 1, errno, "socket");
if (bind(sockets[i], sa, sa_size) < 0) {
char str[128];
size_t len;
int save_errno = errno;
ret = krb5_print_address(&addrs.val[i], str, sizeof(str), &len);
if (ret)
strlcpy(str, "unknown address", sizeof(str));
krb5_warn(context, save_errno, "bind(%s)", str);
continue;
}
maxfd = max(maxfd, sockets[i]);
if (maxfd >= FD_SETSIZE)
krb5_errx(context, 1, "fd too large");
FD_SET(sockets[i], &real_fdset);
}
#ifdef INETD_SUPPORT
} else {
n = 1;
maxfd = 0;
fdz = 0;
sockets = &fdz;
FD_ZERO(&real_fdset);
FD_SET(0, &real_fdset);
}
#endif
if (maxfd == -1)
krb5_errx(context, 1, "No sockets!");
roken_detach_finish(NULL, daemon_child);
while (exit_flag == 0) {
krb5_ssize_t retx;
fd_set fdset = real_fdset;
retx = select(maxfd + 1, &fdset, NULL, NULL, NULL);
if (retx < 0) {
if (errno == EINTR)
continue;
else
krb5_err(context, 1, errno, "select");
}
for (i = 0; i < n; ++i)
if (FD_ISSET(sockets[i], &fdset)) {
u_char buf[BUFSIZ];
socklen_t addrlen = sizeof(__ss);
retx = recvfrom(sockets[i], buf, sizeof(buf), 0,
sa, &addrlen);
if (retx < 0) {
if (errno == EINTR)
break;
else
krb5_err(context, 1, errno, "recvfrom");
}
#ifdef INETD_SUPPORT
if (from_inetd) {
socklen_t loclen = sizeof(__local);
int ret2;
ret2 = get_local_addr(sa, addrlen, localsa, &loclen);
if (ret2 < 0)
krb5_errx (context, errno, "get_local_addr");
ret2 = krb5_sockaddr2address(context, localsa,
&my_addr);
if (ret2)
krb5_errx (context, ret2,
"krb5_sockaddr2address");
my_addrp = &my_addr;
} else
#endif
my_addrp = &addrs.val[i];
process(keytab, sockets[i],
my_addrp,
sa, addrlen,
buf, retx);
#ifdef INETD_SUPPORT
if (from_inetd) {
krb5_free_address(context, &my_addr);
}
#endif
}
#ifdef INETD_SUPPORT
if (from_inetd)
break;
#endif
}
for (i = 0; i < n; ++i)
close(sockets[i]);
free(sockets);
#ifdef INETD_SUPPORT
if (!from_inetd)
#endif
krb5_free_addresses (context, &addrs);
krb5_free_context (context);
return 0;
}
static RETSIGTYPE
sigterm(int sig)
{
exit_flag = 1;
}
int
main(int argc, char **argv)
{
krb5_keytab keytab;
krb5_error_code ret;
char **files;
int port, i;
int aret;
krb5_program_setup(&context, argc, argv, args, num_args, NULL);
if (help_flag)
krb5_std_usage(0, args, num_args);
if (version_flag) {
print_version(NULL);
exit(0);
}
if (detach_from_console > 0 && daemon_child == -1)
roken_detach_prep(argc, argv, "--daemon-child");
if (config_file == NULL) {
aret = asprintf(&config_file, "%s/kdc.conf", hdb_db_dir(context));
if (aret == -1)
errx(1, "out of memory");
}
ret = krb5_prepend_config_files_default(config_file, &files);
if (ret)
krb5_err(context, 1, ret, "getting configuration files");
ret = krb5_set_config_files(context, files);
krb5_free_config_files(files);
if (ret)
krb5_err(context, 1, ret, "reading configuration files");
if (realm_str)
krb5_set_default_realm(context, realm_str);
krb5_openlog(context, "kpasswdd", &log_facility);
krb5_set_warn_dest(context, log_facility);
if (port_str != NULL) {
struct servent *s = roken_getservbyname(port_str, "udp");
if (s != NULL)
port = s->s_port;
else {
char *ptr;
port = strtol(port_str, &ptr, 10);
if (port == 0 && ptr == port_str)
krb5_errx(context, 1, "bad port `%s'", port_str);
port = htons(port);
}
} else
port = krb5_getportbyname(context, "kpasswd", "udp", KPASSWD_PORT);
ret = krb5_kt_register(context, &hdb_get_kt_ops);
if (ret)
krb5_err(context, 1, ret, "krb5_kt_register");
ret = krb5_kt_resolve(context, keytab_str, &keytab);
if (ret)
krb5_err(context, 1, ret, "%s", keytab_str);
kadm5_setup_passwd_quality_check(context, check_library, check_function);
for (i = 0; i < policy_libraries.num_strings; i++) {
ret = kadm5_add_passwd_quality_verifier(context,
policy_libraries.strings[i]);
if (ret)
krb5_err(context, 1, ret, "kadm5_add_passwd_quality_verifier");
}
ret = kadm5_add_passwd_quality_verifier(context, NULL);
if (ret)
krb5_err(context, 1, ret, "kadm5_add_passwd_quality_verifier");
explicit_addresses.len = 0;
if (addresses_str.num_strings) {
int j;
for (j = 0; j < addresses_str.num_strings; ++j)
add_one_address(addresses_str.strings[j], j == 0);
free_getarg_strings(&addresses_str);
} else {
char **foo = krb5_config_get_strings(context, NULL,
"kdc", "addresses", NULL);
if (foo != NULL) {
add_one_address(*foo++, TRUE);
while (*foo)
add_one_address(*foo++, FALSE);
}
}
#ifdef HAVE_SIGACTION
{
struct sigaction sa;
sa.sa_flags = 0;
sa.sa_handler = sigterm;
sigemptyset(&sa.sa_mask);
sigaction(SIGINT, &sa, NULL);
sigaction(SIGTERM, &sa, NULL);
}
#else
signal(SIGINT, sigterm);
signal(SIGTERM, sigterm);
#endif
rk_pidfile(NULL);
return doit(keytab, port);
}