new program
git-svn-id: svn://svn.h5l.se/heimdal/trunk/heimdal@6486 ec53bebd-3082-4978-b11e-865c3cabbd6b
This commit is contained in:
Assar Westerlund
333
appl/kf/kfd.c
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333
appl/kf/kfd.c
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@@ -0,0 +1,333 @@
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/*
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* Copyright (c) 1997 - 1999 Kungliga Tekniska H<>gskolan
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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. All advertising materials mentioning features or use of this software
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* must display the following acknowledgement:
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* This product includes software developed by Kungliga Tekniska
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* H<>gskolan and its contributors.
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*
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* 4. 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 "kf_locl.h"
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RCSID("$Id$");
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krb5_context context;
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static int help_flag;
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static int version_flag;
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static char *port_str;
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char *service = SERVICE;
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int do_inetd = 0;
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static struct getargs args[] = {
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{ "port", 'p', arg_string, &port_str, "port to listen to", "port" },
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{ "inetd",'i',arg_flag,&do_inetd,
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"Not started from inetd", NULL },
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{ "help", 'h', arg_flag, &help_flag },
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{ "version", 0, arg_flag, &version_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, "");
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exit(code);
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}
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static int
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server_setup(krb5_context *context, int argc, char **argv)
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{
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int port = 0;
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int local_argc;
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local_argc = 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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if(port_str){
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struct servent *s = roken_getservbyname(port_str, "tcp");
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if(s)
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port = s->s_port;
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else {
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char *ptr;
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port = strtol (port_str, &ptr, 10);
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if (port == 0 && ptr == port_str)
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errx (1, "Bad port `%s'", port_str);
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port = htons(port);
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}
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}
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if (port == 0)
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port = krb5_getportbyname (*context, PORT, "tcp", PORT_NUM);
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if(argv[local_argc] != NULL)
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usage(1, args, num_args);
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return port;
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}
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static void
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syslog_and_die (const char *m, ...)
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{
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va_list args;
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va_start(args, m);
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vsyslog (LOG_ERR, m, args);
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va_end(args);
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exit (1);
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}
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static void
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syslog_and_cont (const char *m, ...)
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{
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va_list args;
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va_start(args, m);
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vsyslog (LOG_ERR, m, args);
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va_end(args);
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return;
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}
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static int
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proto (int sock, const char *service)
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{
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struct sockaddr_in remote, local;
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int addrlen;
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krb5_address remote_addr, local_addr;
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krb5_auth_context auth_context;
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krb5_error_code status;
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krb5_principal server;
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krb5_ticket *ticket;
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char *name;
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char ret_string[10];
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char hostname[MAXHOSTNAMELEN];
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krb5_data packet;
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krb5_data data;
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krb5_data remotename;
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krb5_data tk_file;
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u_int32_t len, net_len;
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krb5_ccache ccache;
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char ccname[MAXPATHLEN];
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struct passwd *pwd;
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addrlen = sizeof(local);
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if (getsockname (sock, (struct sockaddr *)&local, &addrlen) < 0
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|| addrlen != sizeof(local))
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syslog_and_die("getsockname: %s",strerror(errno));
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addrlen = sizeof(remote);
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if (getpeername (sock, (struct sockaddr *)&remote, &addrlen) < 0
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|| addrlen != sizeof(remote))
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syslog_and_die("getpeername: %s",strerror(errno));
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status = krb5_auth_con_init (context, &auth_context);
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if (status)
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syslog_and_die("krb5_auth_con_init: %s",
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krb5_get_err_text(context, status));
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local_addr.addr_type = AF_INET;
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local_addr.address.length = sizeof(local.sin_addr);
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local_addr.address.data = &local.sin_addr;
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remote_addr.addr_type = AF_INET;
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remote_addr.address.length = sizeof(remote.sin_addr);
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remote_addr.address.data = &remote.sin_addr;
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status = krb5_auth_con_setaddrs (context,
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auth_context,
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&local_addr,
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&remote_addr);
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if (status)
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syslog_and_die("krb5_auth_con_setaddr: %s",
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krb5_get_err_text(context, status));
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if(gethostname (hostname, sizeof(hostname)) < 0)
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syslog_and_die("gethostname: %s",strerror(errno));
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status = krb5_sname_to_principal (context,
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hostname,
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service,
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KRB5_NT_SRV_HST,
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&server);
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if (status)
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syslog_and_die("krb5_sname_to_principal: %s",
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krb5_get_err_text(context, status));
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status = krb5_recvauth (context,
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&auth_context,
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&sock,
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VERSION,
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server,
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0,
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NULL,
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&ticket);
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if (status)
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syslog_and_die("krb5_recvauth: %s",
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krb5_get_err_text(context, status));
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status = krb5_unparse_name (context,
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ticket->client,
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&name);
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if (status)
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syslog_and_die("krb5_unparse_name: %s",
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krb5_get_err_text(context, status));
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status=krb5_read_message (context, &sock, &remotename);
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if (status)
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{syslog_and_die("krb5_read_message: %s",
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krb5_get_err_text(context, status));
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}
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status=krb5_read_message (context, &sock, &tk_file);
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if (status)
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{syslog_and_die("krb5_read_message: %s",
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krb5_get_err_text(context, status));
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}
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krb5_data_zero (&data);
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krb5_data_zero (&packet);
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if (krb5_net_read (context, &sock, &net_len, 4) != 4)
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syslog_and_die("krb5_net_read: %s",strerror(errno));
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len = ntohl(net_len);
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krb5_data_alloc (&packet, len);
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if (krb5_net_read (context, &sock, packet.data, len) != len)
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syslog_and_die("krb5_net_read: %s",strerror(errno));
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status = krb5_rd_priv (context,
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auth_context,
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&packet,
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&data,
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NULL);
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if (status)
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{syslog_and_cont("krb5_rd_priv: %s",
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krb5_get_err_text(context, status));
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goto out;
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}
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pwd = getpwnam ((char *)(remotename.data));
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if (pwd == NULL)
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{status=1;
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syslog_and_cont("getpwnam: %s failed",(char *)(remotename.data));
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goto out;
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}
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if(!krb5_kuserok (context,
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ticket->client,
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(char *)(remotename.data)))
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{status=1;
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syslog_and_cont("krb5_kuserok: permission denied");
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goto out;
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}
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setgid(pwd->pw_gid);
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setuid(pwd->pw_uid);
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if (tk_file.length != 1)
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snprintf (ccname, sizeof(ccname), "%s", (char *)(tk_file.data));
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else
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snprintf (ccname, sizeof(ccname), "FILE:/tmp/krb5cc_%u",pwd->pw_uid);
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status = krb5_cc_resolve (context, ccname, &ccache);
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if (status)
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{syslog_and_cont("krb5_cc_resolve: %s",
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krb5_get_err_text(context, status));
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goto out;
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}
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status = krb5_cc_initialize (context, ccache, ticket->client);
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if (status)
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{syslog_and_cont("krb5_cc_initialize: %s",
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krb5_get_err_text(context, status));
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goto out;
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}
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status = krb5_rd_cred (context, auth_context, ccache, &data);
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krb5_cc_close (context, ccache);
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if (status)
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{syslog_and_cont("krb5_cc_initialize: %s",
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krb5_get_err_text(context, status));
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goto out;
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}
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syslog_and_cont("%s forwarded ticket to %s,%s",
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name,
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(char *)(remotename.data),ccname);
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out:
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if (status)
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{strcpy(ret_string,"no");
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syslog_and_cont("failed");
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}
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else strcpy(ret_string,"ok");
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krb5_data_free (&tk_file);
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krb5_data_free (&remotename);
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krb5_data_free (&packet);
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krb5_data_free (&data);
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free(name);
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len = strlen(ret_string) + 1;
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net_len = htonl(len);
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if (krb5_net_write (context, &sock, &net_len, 4) != 4)
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return 1;
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if (krb5_net_write (context, &sock, ret_string, len) != len)
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return 1;
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return 0 ;
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}
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static int
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doit (int port, const char *service)
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{
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if (do_inetd) mini_inetd(port);
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return proto (STDIN_FILENO, service);
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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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int port;
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int ret;
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set_progname (argv[0]);
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roken_openlog (argv[0], LOG_ODELAY | LOG_PID,LOG_AUTH);
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port = server_setup(&context, argc, argv);
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ret=doit (port, service);
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closelog();
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return ret;
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}
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