434 lines
12 KiB
C
434 lines
12 KiB
C
/*
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* Copyright (c) 1997 - 2000 Kungliga Tekniska Högskolan
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* (Royal Institute of Technology, Stockholm, Sweden).
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* All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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*
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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*
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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*
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* 3. Neither the name of the Institute nor the names of its contributors
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* may be used to endorse or promote products derived from this software
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* without specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE INSTITUTE AND CONTRIBUTORS ``AS IS'' AND
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* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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* ARE DISCLAIMED. IN NO EVENT SHALL THE INSTITUTE OR CONTRIBUTORS BE LIABLE
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* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
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* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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* SUCH DAMAGE.
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*/
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#include "iprop.h"
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RCSID("$Id: ipropd_slave.c,v 1.21 2000/08/06 02:06:19 assar Exp $");
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static krb5_log_facility *log_facility;
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static int
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connect_to_master (krb5_context context, const char *master)
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{
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int fd;
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struct sockaddr_in addr;
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struct hostent *he;
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fd = socket (AF_INET, SOCK_STREAM, 0);
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if (fd < 0)
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krb5_err (context, 1, errno, "socket AF_INET");
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memset (&addr, 0, sizeof(addr));
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addr.sin_family = AF_INET;
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addr.sin_port = krb5_getportbyname (context,
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IPROP_SERVICE, "tcp", IPROP_PORT);
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he = roken_gethostbyname (master);
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if (he == NULL)
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krb5_errx (context, 1, "gethostbyname: %s", hstrerror(h_errno));
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memcpy (&addr.sin_addr, he->h_addr, sizeof(addr.sin_addr));
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if(connect(fd, (struct sockaddr *)&addr, sizeof(addr)) < 0)
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krb5_err (context, 1, errno, "connect");
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return fd;
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}
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static void
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get_creds(krb5_context context, const char *keytab_str,
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krb5_ccache *cache, const char *host)
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{
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krb5_keytab keytab;
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krb5_principal client;
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krb5_error_code ret;
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krb5_get_init_creds_opt init_opts;
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krb5_creds creds;
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char *server;
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char keytab_buf[256];
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ret = krb5_kt_register(context, &hdb_kt_ops);
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if(ret)
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krb5_err(context, 1, ret, "krb5_kt_register");
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if (keytab_str == NULL) {
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ret = krb5_kt_default_name (context, keytab_buf, sizeof(keytab_buf));
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if (ret)
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krb5_err (context, 1, ret, "krb5_kt_default_name");
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keytab_str = keytab_buf;
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}
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ret = krb5_kt_resolve(context, keytab_str, &keytab);
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if(ret)
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krb5_err(context, 1, ret, "%s", keytab_str);
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ret = krb5_sname_to_principal (context, NULL, IPROP_NAME,
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KRB5_NT_SRV_HST, &client);
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if (ret) krb5_err(context, 1, ret, "krb5_sname_to_principal");
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krb5_get_init_creds_opt_init(&init_opts);
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asprintf (&server, "%s/%s", IPROP_NAME, host);
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if (server == NULL)
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krb5_errx (context, 1, "malloc: no memory");
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ret = krb5_get_init_creds_keytab(context, &creds, client, keytab,
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0, server, &init_opts);
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free (server);
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if(ret) krb5_err(context, 1, ret, "krb5_get_init_creds");
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ret = krb5_kt_close(context, keytab);
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if(ret) krb5_err(context, 1, ret, "krb5_kt_close");
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ret = krb5_cc_gen_new(context, &krb5_mcc_ops, cache);
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if(ret) krb5_err(context, 1, ret, "krb5_cc_gen_new");
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ret = krb5_cc_initialize(context, *cache, client);
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if(ret) krb5_err(context, 1, ret, "krb5_cc_initialize");
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ret = krb5_cc_store_cred(context, *cache, &creds);
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if(ret) krb5_err(context, 1, ret, "krb5_cc_store_cred");
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}
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static void
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ihave (krb5_context context, krb5_auth_context auth_context,
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int fd, u_int32_t version)
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{
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int ret;
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u_char buf[8];
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krb5_storage *sp;
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krb5_data data, priv_data;
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sp = krb5_storage_from_mem (buf, 8);
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krb5_store_int32 (sp, I_HAVE);
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krb5_store_int32 (sp, version);
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krb5_storage_free (sp);
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data.length = 8;
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data.data = buf;
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ret = krb5_mk_priv (context, auth_context, &data, &priv_data, NULL);
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if (ret)
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krb5_err (context, 1, ret, "krb_mk_priv");
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ret = krb5_write_message (context, &fd, &priv_data);
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if (ret)
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krb5_err (context, 1, ret, "krb5_write_message");
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krb5_data_free (&priv_data);
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}
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static void
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receive_loop (krb5_context context,
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krb5_storage *sp,
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kadm5_server_context *server_context)
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{
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int ret;
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off_t left, right;
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void *buf;
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int32_t vers;
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do {
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int32_t len, timestamp, tmp;
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enum kadm_ops op;
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if(krb5_ret_int32 (sp, &vers) != 0)
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return;
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krb5_ret_int32 (sp, ×tamp);
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krb5_ret_int32 (sp, &tmp);
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op = tmp;
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krb5_ret_int32 (sp, &len);
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if (vers <= server_context->log_context.version)
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sp->seek(sp, len, SEEK_CUR);
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} while(vers <= server_context->log_context.version);
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left = sp->seek (sp, -16, SEEK_CUR);
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right = sp->seek (sp, 0, SEEK_END);
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buf = malloc (right - left);
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if (buf == NULL && (right - left) != 0) {
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krb5_warnx (context, "malloc: no memory");
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return;
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}
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sp->seek (sp, left, SEEK_SET);
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sp->fetch (sp, buf, right - left);
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write (server_context->log_context.log_fd, buf, right-left);
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fsync (server_context->log_context.log_fd);
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free (buf);
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sp->seek (sp, left, SEEK_SET);
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for(;;) {
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int32_t len, timestamp, tmp;
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enum kadm_ops op;
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if(krb5_ret_int32 (sp, &vers) != 0)
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break;
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krb5_ret_int32 (sp, ×tamp);
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krb5_ret_int32 (sp, &tmp);
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op = tmp;
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krb5_ret_int32 (sp, &len);
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ret = kadm5_log_replay (server_context,
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op, vers, len, sp);
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if (ret)
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krb5_warn (context, ret, "kadm5_log_replay");
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else
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server_context->log_context.version = vers;
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sp->seek (sp, 8, SEEK_CUR);
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}
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}
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static void
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receive (krb5_context context,
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krb5_storage *sp,
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kadm5_server_context *server_context)
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{
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int ret;
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ret = server_context->db->open(context,
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server_context->db,
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O_RDWR | O_CREAT, 0600);
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if (ret)
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krb5_err (context, 1, ret, "db->open");
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receive_loop (context, sp, server_context);
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ret = server_context->db->close (context, server_context->db);
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if (ret)
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krb5_err (context, 1, ret, "db->close");
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}
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static void
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receive_everything (krb5_context context, int fd,
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kadm5_server_context *server_context,
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krb5_auth_context auth_context)
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{
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int ret;
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krb5_data data;
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int32_t vno;
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int32_t opcode;
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ret = server_context->db->open(context,
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server_context->db,
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O_RDWR | O_CREAT | O_TRUNC, 0600);
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if (ret)
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krb5_err (context, 1, ret, "db->open");
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do {
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krb5_storage *sp;
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ret = krb5_read_priv_message(context, auth_context, &fd, &data);
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if (ret)
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krb5_err (context, 1, ret, "krb5_read_priv_message");
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sp = krb5_storage_from_data (&data);
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krb5_ret_int32 (sp, &opcode);
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if (opcode == ONE_PRINC) {
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krb5_data fake_data;
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hdb_entry entry;
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fake_data.data = (char *)data.data + 4;
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fake_data.length = data.length - 4;
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ret = hdb_value2entry (context, &fake_data, &entry);
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if (ret)
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krb5_err (context, 1, ret, "hdb_value2entry");
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ret = server_context->db->store(server_context->context,
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server_context->db,
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0, &entry);
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if (ret)
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krb5_err (context, 1, ret, "hdb_store");
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hdb_free_entry (context, &entry);
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krb5_data_free (&data);
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}
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} while (opcode == ONE_PRINC);
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if (opcode != NOW_YOU_HAVE)
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krb5_errx (context, 1, "receive_everything: strange %d", opcode);
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_krb5_get_int ((char *)data.data + 4, &vno, 4);
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ret = kadm5_log_reinit (server_context);
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if (ret)
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krb5_err(context, 1, ret, "kadm5_log_reinit");
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ret = kadm5_log_set_version (server_context, vno - 1);
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if (ret)
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krb5_err (context, 1, ret, "kadm5_log_set_version");
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ret = kadm5_log_nop (server_context);
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if (ret)
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krb5_err (context, 1, ret, "kadm5_log_nop");
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krb5_data_free (&data);
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ret = server_context->db->close (context, server_context->db);
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if (ret)
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krb5_err (context, 1, ret, "db->close");
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}
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static char *realm;
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static int version_flag;
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static int help_flag;
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static char *keytab_str;
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static struct getargs args[] = {
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{ "realm", 'r', arg_string, &realm },
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{ "keytab", 'k', arg_string, &keytab_str,
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"keytab to get authentication from", "kspec" },
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{ "version", 0, arg_flag, &version_flag },
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{ "help", 0, arg_flag, &help_flag }
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};
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static int num_args = sizeof(args) / sizeof(args[0]);
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static void
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usage (int code, struct getargs *args, int num_args)
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{
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arg_printusage (args, num_args, NULL, "master");
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exit (code);
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}
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int
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main(int argc, char **argv)
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{
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krb5_error_code ret;
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krb5_context context;
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krb5_auth_context auth_context;
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void *kadm_handle;
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kadm5_server_context *server_context;
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kadm5_config_params conf;
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int master_fd;
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krb5_ccache ccache;
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krb5_principal server;
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int optind;
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const char *master;
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optind = krb5_program_setup(&context, argc, argv, args, num_args, usage);
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if(help_flag)
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usage (0, args, num_args);
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if(version_flag) {
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print_version(NULL);
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exit(0);
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}
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argc -= optind;
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argv += optind;
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if (argc != 1)
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usage (1, args, num_args);
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master = argv[0];
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krb5_openlog (context, "ipropd-master", &log_facility);
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krb5_set_warn_dest(context, log_facility);
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ret = krb5_kt_register(context, &hdb_kt_ops);
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if(ret)
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krb5_err(context, 1, ret, "krb5_kt_register");
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memset(&conf, 0, sizeof(conf));
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if(realm) {
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conf.mask |= KADM5_CONFIG_REALM;
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conf.realm = realm;
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}
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ret = kadm5_init_with_password_ctx (context,
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KADM5_ADMIN_SERVICE,
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NULL,
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KADM5_ADMIN_SERVICE,
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&conf, 0, 0,
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&kadm_handle);
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if (ret)
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krb5_err (context, 1, ret, "kadm5_init_with_password_ctx");
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server_context = (kadm5_server_context *)kadm_handle;
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ret = kadm5_log_init (server_context);
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if (ret)
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krb5_err (context, 1, ret, "kadm5_log_init");
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get_creds(context, keytab_str, &ccache, master);
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master_fd = connect_to_master (context, master);
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ret = krb5_sname_to_principal (context, master, IPROP_NAME,
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KRB5_NT_SRV_HST, &server);
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if (ret)
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krb5_err (context, 1, ret, "krb5_sname_to_principal");
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auth_context = NULL;
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ret = krb5_sendauth (context, &auth_context, &master_fd,
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IPROP_VERSION, NULL, server,
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AP_OPTS_MUTUAL_REQUIRED, NULL, NULL,
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ccache, NULL, NULL, NULL);
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if (ret)
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krb5_err (context, 1, ret, "krb5_sendauth");
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ihave (context, auth_context, master_fd,
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server_context->log_context.version);
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for (;;) {
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int ret;
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krb5_data out;
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krb5_storage *sp;
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int32_t tmp;
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ret = krb5_read_priv_message(context, auth_context, &master_fd, &out);
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if (ret)
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krb5_err (context, 1, ret, "krb5_read_priv_message");
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sp = krb5_storage_from_mem (out.data, out.length);
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krb5_ret_int32 (sp, &tmp);
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switch (tmp) {
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case FOR_YOU :
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receive (context, sp, server_context);
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ihave (context, auth_context, master_fd,
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server_context->log_context.version);
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break;
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case TELL_YOU_EVERYTHING :
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receive_everything (context, master_fd, server_context,
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auth_context);
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break;
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case NOW_YOU_HAVE :
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case I_HAVE :
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case ONE_PRINC :
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default :
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krb5_warnx (context, "Ignoring command %d", tmp);
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break;
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}
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krb5_storage_free (sp);
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krb5_data_free (&out);
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}
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return 0;
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}
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