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heimdal/lib/kadm5/ipropd_slave.c
Love Hörnquist Åstrand 5d190295aa add context argument to krb5_get_init_creds_opt_alloc 
git-svn-id: svn://svn.h5l.se/heimdal/trunk/heimdal@12783 ec53bebd-3082-4978-b11e-865c3cabbd6b
2003-09-08 15:28:20 +00:00

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/*
* Copyright (c) 1997 - 2003 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("$Id$");
static krb5_log_facility *log_facility;
static char *server_time_lost = "5 min";
static int time_before_lost;
static int
connect_to_master (krb5_context context, const char *master)
{
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;
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 *host)
{
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, NULL, 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, host);
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(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, u_int32_t version)
{
int ret;
u_char buf[8];
krb5_storage *sp;
krb5_data data, priv_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_mk_priv (context, auth_context, &data, &priv_data, NULL);
if (ret)
krb5_err (context, 1, ret, "krb_mk_priv");
ret = krb5_write_message (context, &fd, &priv_data);
if (ret)
krb5_err (context, 1, ret, "krb5_write_message");
krb5_data_free (&priv_data);
}
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;
do {
int32_t len, timestamp, tmp;
enum kadm_ops op;
if(krb5_ret_int32 (sp, &vers) != 0)
return;
krb5_ret_int32 (sp, &timestamp);
krb5_ret_int32 (sp, &tmp);
op = tmp;
krb5_ret_int32 (sp, &len);
if (vers <= server_context->log_context.version)
krb5_storage_seek(sp, len, SEEK_CUR);
} while(vers <= server_context->log_context.version);
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_warnx (context, "malloc: no memory");
return;
}
krb5_storage_seek (sp, left, SEEK_SET);
krb5_storage_read (sp, buf, right - left);
write (server_context->log_context.log_fd, buf, right-left);
fsync (server_context->log_context.log_fd);
free (buf);
krb5_storage_seek (sp, left, SEEK_SET);
for(;;) {
int32_t len, timestamp, tmp;
enum kadm_ops op;
if(krb5_ret_int32 (sp, &vers) != 0)
break;
krb5_ret_int32 (sp, &timestamp);
krb5_ret_int32 (sp, &tmp);
op = tmp;
krb5_ret_int32 (sp, &len);
ret = kadm5_log_replay (server_context,
op, vers, len, sp);
if (ret)
krb5_warn (context, ret, "kadm5_log_replay: %d", (int)vers);
else
server_context->log_context.version = vers;
krb5_storage_seek (sp, 8, SEEK_CUR);
}
}
static void
receive (krb5_context context,
krb5_storage *sp,
kadm5_server_context *server_context)
{
int ret;
ret = server_context->db->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->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_data data;
int ret;
ret = krb5_data_alloc (&data, 4);
if (ret)
krb5_err (context, 1, ret, "send_im_here");
_krb5_put_int(data.data, I_AM_HERE, 4);
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;
unsigned long tmp;
char *dbname;
HDB *mydb;
asprintf(&dbname, "%s-NEW", server_context->db->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->open(context, mydb, O_RDWR | O_CREAT | O_TRUNC, 0600);
if (ret)
krb5_err (context, 1, ret, "db->open");
do {
krb5_storage *sp;
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);
krb5_ret_int32 (sp, &opcode);
if (opcode == ONE_PRINC) {
krb5_data fake_data;
hdb_entry entry;
fake_data.data = (char *)data.data + 4;
fake_data.length = data.length - 4;
ret = hdb_value2entry (context, &fake_data, &entry);
if (ret)
krb5_err (context, 1, ret, "hdb_value2entry");
ret = mydb->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);
}
} while (opcode == ONE_PRINC);
if (opcode != NOW_YOU_HAVE)
krb5_errx (context, 1, "receive_everything: strange %d", opcode);
_krb5_get_int ((char *)data.data + 4, &tmp, 4);
vno = tmp;
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->rename (context, mydb, server_context->db->name);
if (ret)
krb5_err (context, 1, ret, "db->rename");
ret = mydb->close (context, mydb);
if (ret)
krb5_err (context, 1, ret, "db->close");
ret = mydb->destroy (context, mydb);
if (ret)
krb5_err (context, 1, ret, "db->destroy");
}
static char *realm;
static int version_flag;
static int help_flag;
static char *keytab_str;
static struct getargs args[] = {
{ "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" },
{ "version", 0, arg_flag, &version_flag },
{ "help", 0, arg_flag, &help_flag }
};
static int num_args = sizeof(args) / sizeof(args[0]);
static void
usage (int code, struct getargs *args, int num_args)
{
arg_printusage (args, num_args, NULL, "master");
exit (code);
}
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;
int optind;
const char *master;
optind = krb5_program_setup(&context, argc, argv, args, num_args, usage);
if(help_flag)
usage (0, args, num_args);
if(version_flag) {
print_version(NULL);
exit(0);
}
argc -= optind;
argv += optind;
if (argc != 1)
usage (1, args, num_args);
master = argv[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);
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");
ihave (context, auth_context, master_fd,
server_context->log_context.version);
for (;;) {
int ret;
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);
}
return 0;
}
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