| Current Path : /usr/src/crypto/heimdal/lib/kadm5/ |
FreeBSD hs32.drive.ne.jp 9.1-RELEASE FreeBSD 9.1-RELEASE #1: Wed Jan 14 12:18:08 JST 2015 root@hs32.drive.ne.jp:/sys/amd64/compile/hs32 amd64 |
| Current File : //usr/src/crypto/heimdal/lib/kadm5/ipropd_slave.c |
/*
* Copyright (c) 1997 - 2007 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 "iprop.h"
RCSID("$Id: ipropd_slave.c 22211 2007-12-07 19:27:27Z lha $");
static krb5_log_facility *log_facility;
static char *server_time_lost = "5 min";
static int time_before_lost;
const char *slave_str = NULL;
static int
connect_to_master (krb5_context context, const char *master,
const char *port_str)
{
int fd;
struct sockaddr_in addr;
struct hostent *he;
fd = socket (AF_INET, SOCK_STREAM, 0);
if (fd < 0)
krb5_err (context, 1, errno, "socket AF_INET");
memset (&addr, 0, sizeof(addr));
addr.sin_family = AF_INET;
if (port_str) {
addr.sin_port = krb5_getportbyname (context,
port_str, "tcp",
0);
if (addr.sin_port == 0) {
char *ptr;
long port;
port = strtol (port_str, &ptr, 10);
if (port == 0 && ptr == port_str)
krb5_errx (context, 1, "bad port `%s'", port_str);
addr.sin_port = htons(port);
}
} else {
addr.sin_port = krb5_getportbyname (context, IPROP_SERVICE,
"tcp", IPROP_PORT);
}
he = roken_gethostbyname (master);
if (he == NULL)
krb5_errx (context, 1, "gethostbyname: %s", hstrerror(h_errno));
memcpy (&addr.sin_addr, he->h_addr, sizeof(addr.sin_addr));
if(connect(fd, (struct sockaddr *)&addr, sizeof(addr)) < 0)
krb5_err (context, 1, errno, "connect");
return fd;
}
static void
get_creds(krb5_context context, const char *keytab_str,
krb5_ccache *cache, const char *serverhost)
{
krb5_keytab keytab;
krb5_principal client;
krb5_error_code ret;
krb5_get_init_creds_opt *init_opts;
krb5_creds creds;
char *server;
char keytab_buf[256];
if (keytab_str == NULL) {
ret = krb5_kt_default_name (context, keytab_buf, sizeof(keytab_buf));
if (ret)
krb5_err (context, 1, ret, "krb5_kt_default_name");
keytab_str = keytab_buf;
}
ret = krb5_kt_resolve(context, keytab_str, &keytab);
if(ret)
krb5_err(context, 1, ret, "%s", keytab_str);
ret = krb5_sname_to_principal (context, slave_str, IPROP_NAME,
KRB5_NT_SRV_HST, &client);
if (ret) krb5_err(context, 1, ret, "krb5_sname_to_principal");
ret = krb5_get_init_creds_opt_alloc(context, &init_opts);
if (ret) krb5_err(context, 1, ret, "krb5_get_init_creds_opt_alloc");
asprintf (&server, "%s/%s", IPROP_NAME, serverhost);
if (server == NULL)
krb5_errx (context, 1, "malloc: no memory");
ret = krb5_get_init_creds_keytab(context, &creds, client, keytab,
0, server, init_opts);
free (server);
krb5_get_init_creds_opt_free(context, init_opts);
if(ret) krb5_err(context, 1, ret, "krb5_get_init_creds");
ret = krb5_kt_close(context, keytab);
if(ret) krb5_err(context, 1, ret, "krb5_kt_close");
ret = krb5_cc_gen_new(context, &krb5_mcc_ops, cache);
if(ret) krb5_err(context, 1, ret, "krb5_cc_gen_new");
ret = krb5_cc_initialize(context, *cache, client);
if(ret) krb5_err(context, 1, ret, "krb5_cc_initialize");
ret = krb5_cc_store_cred(context, *cache, &creds);
if(ret) krb5_err(context, 1, ret, "krb5_cc_store_cred");
}
static void
ihave (krb5_context context, krb5_auth_context auth_context,
int fd, uint32_t version)
{
int ret;
u_char buf[8];
krb5_storage *sp;
krb5_data data;
sp = krb5_storage_from_mem (buf, 8);
krb5_store_int32 (sp, I_HAVE);
krb5_store_int32 (sp, version);
krb5_storage_free (sp);
data.length = 8;
data.data = buf;
ret = krb5_write_priv_message(context, auth_context, &fd, &data);
if (ret)
krb5_err (context, 1, ret, "krb5_write_priv_message");
}
static void
receive_loop (krb5_context context,
krb5_storage *sp,
kadm5_server_context *server_context)
{
int ret;
off_t left, right;
void *buf;
int32_t vers, vers2;
ssize_t sret;
/*
* Seek to the current version of the local database.
*/
do {
int32_t len, timestamp, tmp;
enum kadm_ops op;
if(krb5_ret_int32 (sp, &vers) != 0)
return;
krb5_ret_int32 (sp, ×tamp);
krb5_ret_int32 (sp, &tmp);
op = tmp;
krb5_ret_int32 (sp, &len);
if (vers <= server_context->log_context.version)
krb5_storage_seek(sp, len + 8, SEEK_CUR);
} while(vers <= server_context->log_context.version);
/*
* Read up rest of the entires into the memory...
*/
left = krb5_storage_seek (sp, -16, SEEK_CUR);
right = krb5_storage_seek (sp, 0, SEEK_END);
buf = malloc (right - left);
if (buf == NULL && (right - left) != 0)
krb5_errx (context, 1, "malloc: no memory");
/*
* ...and then write them out to the on-disk log.
*/
krb5_storage_seek (sp, left, SEEK_SET);
krb5_storage_read (sp, buf, right - left);
sret = write (server_context->log_context.log_fd, buf, right-left);
if (sret != right - left)
krb5_err(context, 1, errno, "Failed to write log to disk");
ret = fsync (server_context->log_context.log_fd);
if (ret)
krb5_err(context, 1, errno, "Failed to sync log to disk");
free (buf);
/*
* Go back to the startpoint and start to commit the entires to
* the database.
*/
krb5_storage_seek (sp, left, SEEK_SET);
for(;;) {
int32_t len, len2, timestamp, tmp;
off_t cur, cur2;
enum kadm_ops op;
if(krb5_ret_int32 (sp, &vers) != 0)
break;
ret = krb5_ret_int32 (sp, ×tamp);
if (ret) krb5_errx(context, 1, "entry %ld: too short", (long)vers);
ret = krb5_ret_int32 (sp, &tmp);
if (ret) krb5_errx(context, 1, "entry %ld: too short", (long)vers);
op = tmp;
ret = krb5_ret_int32 (sp, &len);
if (ret) krb5_errx(context, 1, "entry %ld: too short", (long)vers);
if (len < 0)
krb5_errx(context, 1, "log is corrupted, "
"negative length of entry version %ld: %ld",
(long)vers, (long)len);
cur = krb5_storage_seek(sp, 0, SEEK_CUR);
krb5_warnx (context, "replaying entry %d", (int)vers);
ret = kadm5_log_replay (server_context,
op, vers, len, sp);
if (ret) {
char *s = krb5_get_error_message(server_context->context, ret);
krb5_warnx (context,
"kadm5_log_replay: %ld. Lost entry entry, "
"Database out of sync ?: %s (%d)",
(long)vers, s ? s : "unknown error", ret);
krb5_xfree(s);
}
{
/*
* Make sure the krb5_log_replay does the right thing wrt
* reading out data from the sp.
*/
cur2 = krb5_storage_seek(sp, 0, SEEK_CUR);
if (cur + len != cur2)
krb5_errx(context, 1,
"kadm5_log_reply version: %ld didn't read the whole entry",
(long)vers);
}
if (krb5_ret_int32 (sp, &len2) != 0)
krb5_errx(context, 1, "entry %ld: postamble too short", (long)vers);
if(krb5_ret_int32 (sp, &vers2) != 0)
krb5_errx(context, 1, "entry %ld: postamble too short", (long)vers);
if (len != len2)
krb5_errx(context, 1, "entry %ld: len != len2", (long)vers);
if (vers != vers2)
krb5_errx(context, 1, "entry %ld: vers != vers2", (long)vers);
}
/*
* Update version
*/
server_context->log_context.version = vers;
}
static void
receive (krb5_context context,
krb5_storage *sp,
kadm5_server_context *server_context)
{
int ret;
ret = server_context->db->hdb_open(context,
server_context->db,
O_RDWR | O_CREAT, 0600);
if (ret)
krb5_err (context, 1, ret, "db->open");
receive_loop (context, sp, server_context);
ret = server_context->db->hdb_close (context, server_context->db);
if (ret)
krb5_err (context, 1, ret, "db->close");
}
static void
send_im_here (krb5_context context, int fd,
krb5_auth_context auth_context)
{
krb5_storage *sp;
krb5_data data;
int ret;
ret = krb5_data_alloc (&data, 4);
if (ret)
krb5_err (context, 1, ret, "send_im_here");
sp = krb5_storage_from_data (&data);
if (sp == NULL)
krb5_errx (context, 1, "krb5_storage_from_data");
krb5_store_int32(sp, I_AM_HERE);
krb5_storage_free(sp);
ret = krb5_write_priv_message(context, auth_context, &fd, &data);
krb5_data_free(&data);
if (ret)
krb5_err (context, 1, ret, "krb5_write_priv_message");
}
static void
receive_everything (krb5_context context, int fd,
kadm5_server_context *server_context,
krb5_auth_context auth_context)
{
int ret;
krb5_data data;
int32_t vno;
int32_t opcode;
krb5_storage *sp;
char *dbname;
HDB *mydb;
krb5_warnx(context, "receive complete database");
asprintf(&dbname, "%s-NEW", server_context->db->hdb_name);
ret = hdb_create(context, &mydb, dbname);
if(ret)
krb5_err(context,1, ret, "hdb_create");
free(dbname);
ret = hdb_set_master_keyfile (context,
mydb, server_context->config.stash_file);
if(ret)
krb5_err(context,1, ret, "hdb_set_master_keyfile");
/* I really want to use O_EXCL here, but given that I can't easily clean
up on error, I won't */
ret = mydb->hdb_open(context, mydb, O_RDWR | O_CREAT | O_TRUNC, 0600);
if (ret)
krb5_err (context, 1, ret, "db->open");
sp = NULL;
do {
ret = krb5_read_priv_message(context, auth_context, &fd, &data);
if (ret)
krb5_err (context, 1, ret, "krb5_read_priv_message");
sp = krb5_storage_from_data (&data);
if (sp == NULL)
krb5_errx (context, 1, "krb5_storage_from_data");
krb5_ret_int32 (sp, &opcode);
if (opcode == ONE_PRINC) {
krb5_data fake_data;
hdb_entry_ex entry;
krb5_storage_free(sp);
fake_data.data = (char *)data.data + 4;
fake_data.length = data.length - 4;
memset(&entry, 0, sizeof(entry));
ret = hdb_value2entry (context, &fake_data, &entry.entry);
if (ret)
krb5_err (context, 1, ret, "hdb_value2entry");
ret = mydb->hdb_store(server_context->context,
mydb,
0, &entry);
if (ret)
krb5_err (context, 1, ret, "hdb_store");
hdb_free_entry (context, &entry);
krb5_data_free (&data);
} else if (opcode == NOW_YOU_HAVE)
;
else
krb5_errx (context, 1, "strange opcode %d", opcode);
} while (opcode == ONE_PRINC);
if (opcode != NOW_YOU_HAVE)
krb5_errx (context, 1, "receive_everything: strange %d", opcode);
krb5_ret_int32 (sp, &vno);
krb5_storage_free(sp);
ret = kadm5_log_reinit (server_context);
if (ret)
krb5_err(context, 1, ret, "kadm5_log_reinit");
ret = kadm5_log_set_version (server_context, vno - 1);
if (ret)
krb5_err (context, 1, ret, "kadm5_log_set_version");
ret = kadm5_log_nop (server_context);
if (ret)
krb5_err (context, 1, ret, "kadm5_log_nop");
krb5_data_free (&data);
ret = mydb->hdb_rename (context, mydb, server_context->db->hdb_name);
if (ret)
krb5_err (context, 1, ret, "db->rename");
ret = mydb->hdb_close (context, mydb);
if (ret)
krb5_err (context, 1, ret, "db->close");
ret = mydb->hdb_destroy (context, mydb);
if (ret)
krb5_err (context, 1, ret, "db->destroy");
krb5_warnx(context, "receive complete database, version %ld", (long)vno);
}
static char *config_file;
static char *realm;
static int version_flag;
static int help_flag;
static char *keytab_str;
static char *port_str;
static int detach_from_console = 0;
static struct getargs args[] = {
{ "config-file", 'c', arg_string, &config_file },
{ "realm", 'r', arg_string, &realm },
{ "keytab", 'k', arg_string, &keytab_str,
"keytab to get authentication from", "kspec" },
{ "time-lost", 0, arg_string, &server_time_lost,
"time before server is considered lost", "time" },
{ "port", 0, arg_string, &port_str,
"port ipropd-slave will connect to", "port"},
{ "detach", 0, arg_flag, &detach_from_console,
"detach from console" },
{ "hostname", 0, arg_string, &slave_str,
"hostname of slave (if not same as hostname)", "hostname" },
{ "version", 0, arg_flag, &version_flag },
{ "help", 0, arg_flag, &help_flag }
};
static int num_args = sizeof(args) / sizeof(args[0]);
int
main(int argc, char **argv)
{
krb5_error_code ret;
krb5_context context;
krb5_auth_context auth_context;
void *kadm_handle;
kadm5_server_context *server_context;
kadm5_config_params conf;
int master_fd;
krb5_ccache ccache;
krb5_principal server;
char **files;
int optidx;
const char *master;
optidx = 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);
}
setup_signal();
if (config_file == NULL) {
asprintf(&config_file, "%s/kdc.conf", hdb_db_dir(context));
if (config_file == NULL)
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");
argc -= optidx;
argv += optidx;
if (argc != 1)
krb5_std_usage(1, args, num_args);
master = argv[0];
if (detach_from_console)
daemon(0, 0);
pidfile (NULL);
krb5_openlog (context, "ipropd-slave", &log_facility);
krb5_set_warn_dest(context, log_facility);
ret = krb5_kt_register(context, &hdb_kt_ops);
if(ret)
krb5_err(context, 1, ret, "krb5_kt_register");
time_before_lost = parse_time (server_time_lost, "s");
if (time_before_lost < 0)
krb5_errx (context, 1, "couldn't parse time: %s", server_time_lost);
memset(&conf, 0, sizeof(conf));
if(realm) {
conf.mask |= KADM5_CONFIG_REALM;
conf.realm = realm;
}
ret = kadm5_init_with_password_ctx (context,
KADM5_ADMIN_SERVICE,
NULL,
KADM5_ADMIN_SERVICE,
&conf, 0, 0,
&kadm_handle);
if (ret)
krb5_err (context, 1, ret, "kadm5_init_with_password_ctx");
server_context = (kadm5_server_context *)kadm_handle;
ret = kadm5_log_init (server_context);
if (ret)
krb5_err (context, 1, ret, "kadm5_log_init");
get_creds(context, keytab_str, &ccache, master);
master_fd = connect_to_master (context, master, port_str);
ret = krb5_sname_to_principal (context, master, IPROP_NAME,
KRB5_NT_SRV_HST, &server);
if (ret)
krb5_err (context, 1, ret, "krb5_sname_to_principal");
auth_context = NULL;
ret = krb5_sendauth (context, &auth_context, &master_fd,
IPROP_VERSION, NULL, server,
AP_OPTS_MUTUAL_REQUIRED, NULL, NULL,
ccache, NULL, NULL, NULL);
if (ret)
krb5_err (context, 1, ret, "krb5_sendauth");
krb5_warnx(context, "ipropd-slave started at version: %ld",
(long)server_context->log_context.version);
ihave (context, auth_context, master_fd,
server_context->log_context.version);
while (exit_flag == 0) {
krb5_data out;
krb5_storage *sp;
int32_t tmp;
fd_set readset;
struct timeval to;
if (master_fd >= FD_SETSIZE)
krb5_errx (context, 1, "fd too large");
FD_ZERO(&readset);
FD_SET(master_fd, &readset);
to.tv_sec = time_before_lost;
to.tv_usec = 0;
ret = select (master_fd + 1,
&readset, NULL, NULL, &to);
if (ret < 0) {
if (errno == EINTR)
continue;
else
krb5_err (context, 1, errno, "select");
}
if (ret == 0)
krb5_errx (context, 1, "server didn't send a message "
"in %d seconds", time_before_lost);
ret = krb5_read_priv_message(context, auth_context, &master_fd, &out);
if (ret)
krb5_err (context, 1, ret, "krb5_read_priv_message");
sp = krb5_storage_from_mem (out.data, out.length);
krb5_ret_int32 (sp, &tmp);
switch (tmp) {
case FOR_YOU :
receive (context, sp, server_context);
ihave (context, auth_context, master_fd,
server_context->log_context.version);
break;
case TELL_YOU_EVERYTHING :
receive_everything (context, master_fd, server_context,
auth_context);
break;
case ARE_YOU_THERE :
send_im_here (context, master_fd, auth_context);
break;
case NOW_YOU_HAVE :
case I_HAVE :
case ONE_PRINC :
case I_AM_HERE :
default :
krb5_warnx (context, "Ignoring command %d", tmp);
break;
}
krb5_storage_free (sp);
krb5_data_free (&out);
}
if(exit_flag == SIGXCPU)
krb5_warnx(context, "%s CPU time limit exceeded", getprogname());
else if(exit_flag == SIGINT || exit_flag == SIGTERM)
krb5_warnx(context, "%s terminated", getprogname());
else
krb5_warnx(context, "%s unexpected exit reason: %d",
getprogname(), exit_flag);
return 0;
}