appl/popper/pop_debug.c

   1 /*
   2  * Copyright (c) 1995 - 2002 Kungliga Tekniska Högskolan
   3  * (Royal Institute of Technology, Stockholm, Sweden).
   4  * All rights reserved.
   5  *
   6  * Redistribution and use in source and binary forms, with or without
   7  * modification, are permitted provided that the following conditions
   8  * are met:
   9  *
  10  * 1. Redistributions of source code must retain the above copyright
  11  *    notice, this list of conditions and the following disclaimer.
  12  *
  13  * 2. Redistributions in binary form must reproduce the above copyright
  14  *    notice, this list of conditions and the following disclaimer in the
  15  *    documentation and/or other materials provided with the distribution.
  16  *
  17  * 3. Neither the name of the Institute nor the names of its contributors
  18  *    may be used to endorse or promote products derived from this software
  19  *    without specific prior written permission.
  20  *
  21  * THIS SOFTWARE IS PROVIDED BY THE INSTITUTE AND CONTRIBUTORS ``AS IS'' AND
  22  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
  23  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
  24  * ARE DISCLAIMED.  IN NO EVENT SHALL THE INSTITUTE OR CONTRIBUTORS BE LIABLE
  25  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
  26  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
  27  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
  28  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
  29  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
  30  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
  31  * SUCH DAMAGE.
  32  */
  33
  34 /* Tiny program to help debug popper */
  35
  36 #include "popper.h"
  37 RCSID("$Id$");
  38
  39 static void
  40 loop(int s)
  41 {
  42     char cmd[1024];
  43     char buf[1024];
  44     fd_set fds;
  45     while(1){
  46         FD_ZERO(&fds);
  47         FD_SET(0, &fds);
  48         FD_SET(s, &fds);
  49         if(select(s+1, &fds, 0, 0, 0) < 0)
  50             err(1, "select");
  51         if(FD_ISSET(0, &fds)){
  52             fgets(cmd, sizeof(cmd), stdin);
  53             cmd[strlen(cmd) - 1] = '\0';
  54             strlcat (cmd, "\r\n", sizeof(cmd));
  55             write(s, cmd, strlen(cmd));
  56         }
  57         if(FD_ISSET(s, &fds)){
  58             int n = read(s, buf, sizeof(buf));
  59             if(n == 0)
  60                 exit(0);
  61             fwrite(buf, n, 1, stdout);
  62         }
  63     }
  64 }
  65
  66 static int
  67 get_socket (const char *hostname, int port)
  68 {
  69     int ret;
  70     struct addrinfo *ai, *a;
  71     struct addrinfo hints;
  72     char portstr[NI_MAXSERV];
  73
  74     memset (&hints, 0, sizeof(hints));
  75     hints.ai_socktype = SOCK_STREAM;
  76     snprintf (portstr, sizeof(portstr), "%d", ntohs(port));
  77     ret = getaddrinfo (hostname, portstr, &hints, &ai);
  78     if (ret)
  79         errx (1, "getaddrinfo %s: %s", hostname, gai_strerror (ret));
  80
  81     for (a = ai; a != NULL; a = a->ai_next) {
  82         int s;
  83
  84         s = socket (a->ai_family, a->ai_socktype, a->ai_protocol);
  85         if (s < 0)
  86             continue;
  87         if (connect (s, a->ai_addr, a->ai_addrlen) < 0) {
  88             close (s);
  89             continue;
  90         }
  91         freeaddrinfo (ai);
  92         return s;
  93     }
  94     err (1, "failed to connect to %s", hostname);
  95 }
  96
  97 #ifdef KRB4
  98 static int
  99 doit_v4 (char *host, int port)
 100 {
 101     KTEXT_ST ticket;
 102     MSG_DAT msg_data;
 103     CREDENTIALS cred;
 104     des_key_schedule sched;
 105     int ret;
 106     int s = get_socket (host, port);
 107
 108     ret = krb_sendauth(0,
 109                        s,
 110                        &ticket,
 111                        "pop",
 112                        host,
 113                        krb_realmofhost(host),
 114                        getpid(),
 115                        &msg_data,
 116                        &cred,
 117                        sched,
 118                        NULL,
 119                        NULL,
 120                        "KPOPV0.1");
 121     if(ret) {
 122         warnx("krb_sendauth: %s", krb_get_err_text(ret));
 123         return 1;
 124     }
 125     loop(s);
 126     return 0;
 127 }
 128 #endif
 129
 130 #ifdef KRB5
 131 static int
 132 doit_v5 (char *host, int port)
 133 {
 134     krb5_error_code ret;
 135     krb5_context context;
 136     krb5_auth_context auth_context = NULL;
 137     krb5_principal server;
 138     int s = get_socket (host, port);
 139
 140     ret = krb5_init_context (&context);
 141     if (ret)
 142         errx (1, "krb5_init_context failed: %d", ret);
 143
 144     ret = krb5_sname_to_principal (context,
 145                                    host,
 146                                    "pop",
 147                                    KRB5_NT_SRV_HST,
 148                                    &server);
 149     if (ret) {
 150         warnx ("krb5_sname_to_principal: %s",
 151                krb5_get_err_text (context, ret));
 152         return 1;
 153     }
 154     ret = krb5_sendauth (context,
 155                          &auth_context,
 156                          &s,
 157                          "KPOPV1.0",
 158                          NULL,
 159                          server,
 160                          0,
 161                          NULL,
 162                          NULL,
 163                          NULL,
 164                          NULL,
 165                          NULL,
 166                          NULL);
 167      if (ret) {
 168          warnx ("krb5_sendauth: %s",
 169                 krb5_get_err_text (context, ret));
 170          return 1;
 171      }
 172      loop (s);
 173      return 0;
 174 }
 175 #endif
 176
 177
 178 #ifdef KRB4
 179 static int use_v4 = -1;
 180 #endif
 181 #ifdef KRB5
 182 static int use_v5 = -1;
 183 #endif
 184 static char *port_str;
 185 static int do_version;
 186 static int do_help;
 187
 188 struct getargs args[] = {
 189 #ifdef KRB4
 190     { "krb4",   '4', arg_flag,          &use_v4,        "Use Kerberos V4",
 191       NULL },
 192 #endif
 193 #ifdef KRB5
 194     { "krb5",   '5', arg_flag,          &use_v5,        "Use Kerberos V5",
 195       NULL },
 196 #endif
 197     { "port",   'p', arg_string,        &port_str,      "Use this port",
 198       "number-or-service" },
 199     { "version", 0,  arg_flag,          &do_version,    "Print version",
 200       NULL },
 201     { "help",    0,  arg_flag,          &do_help,       NULL,
 202       NULL }
 203 };
 204
 205 static void
 206 usage (int ret)
 207 {
 208     arg_printusage (args,
 209                     sizeof(args) / sizeof(args[0]),
 210                     NULL,
 211                     "hostname");
 212     exit (ret);
 213 }
 214
 215 int
 216 main(int argc, char **argv)
 217 {
 218     int port = 0;
 219     int ret = 1;
 220     int optind = 0;
 221
 222     setprogname(argv[0]);
 223
 224     if (getarg (args, sizeof(args) / sizeof(args[0]), argc, argv,
 225                 &optind))
 226         usage (1);
 227
 228     argc -= optind;
 229     argv += optind;
 230
 231     if (do_help)
 232         usage (0);
 233
 234     if (do_version) {
 235         print_version (NULL);
 236         return 0;
 237     }
 238
 239     if (argc < 1)
 240         usage (1);
 241
 242     if (port_str) {
 243         struct servent *s = roken_getservbyname (port_str, "tcp");
 244
 245         if (s)
 246             port = s->s_port;
 247         else {
 248             char *ptr;
 249
 250             port = strtol (port_str, &ptr, 10);
 251             if (port == 0 && ptr == port_str)
 252                 errx (1, "Bad port `%s'", port_str);
 253             port = htons(port);
 254         }
 255     }
 256     if (port == 0) {
 257 #ifdef KRB5
 258         port = krb5_getportbyname (NULL, "kpop", "tcp", 1109);
 259 #elif defined(KRB4)
 260         port = k_getportbyname ("kpop", "tcp", 1109);
 261 #else
 262 #error must define KRB4 or KRB5
 263 #endif
 264     }
 265
 266 #if defined(KRB4) && defined(KRB5)
 267     if(use_v4 == -1 && use_v5 == 1)
 268         use_v4 = 0;
 269     if(use_v5 == -1 && use_v4 == 1)
 270         use_v5 = 0;
 271 #endif
 272
 273 #ifdef KRB5
 274     if (ret && use_v5) {
 275         ret = doit_v5 (argv[0], port);
 276     }
 277 #endif
 278 #ifdef KRB4
 279     if (ret && use_v4) {
 280         ret = doit_v4 (argv[0], port);
 281     }
 282 #endif
 283     return ret;
 284 }