crypto/dist/heimdal/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("$Heimdal: pop_debug.c 10965 2002-05-02 16:27:16Z joda $"
  38         "$NetBSD$");
  39
  40 static void
  41 loop(int s)
  42 {
  43     char cmd[1024];
  44     char buf[1024];
  45     fd_set fds;
  46     while(1){
  47         FD_ZERO(&fds);
  48         FD_SET(0, &fds);
  49         FD_SET(s, &fds);
  50         if(select(s+1, &fds, 0, 0, 0) < 0)
  51             err(1, "select");
  52         if(FD_ISSET(0, &fds)){
  53             fgets(cmd, sizeof(cmd), stdin);
  54             cmd[strlen(cmd) - 1] = '\0';
  55             strlcat (cmd, "\r\n", sizeof(cmd));
  56             write(s, cmd, strlen(cmd));
  57         }
  58         if(FD_ISSET(s, &fds)){
  59             int n = read(s, buf, sizeof(buf));
  60             if(n == 0)
  61                 exit(0);
  62             fwrite(buf, n, 1, stdout);
  63         }
  64     }
  65 }
  66
  67 static int
  68 get_socket (const char *hostname, int port)
  69 {
  70     int ret;
  71     struct addrinfo *ai, *a;
  72     struct addrinfo hints;
  73     char portstr[NI_MAXSERV];
  74
  75     memset (&hints, 0, sizeof(hints));
  76     hints.ai_socktype = SOCK_STREAM;
  77     snprintf (portstr, sizeof(portstr), "%d", ntohs(port));
  78     ret = getaddrinfo (hostname, portstr, &hints, &ai);
  79     if (ret)
  80         errx (1, "getaddrinfo %s: %s", hostname, gai_strerror (ret));
  81
  82     for (a = ai; a != NULL; a = a->ai_next) {
  83         int s;
  84
  85         s = socket (a->ai_family, a->ai_socktype, a->ai_protocol);
  86         if (s < 0)
  87             continue;
  88         if (connect (s, a->ai_addr, a->ai_addrlen) < 0) {
  89             close (s);
  90             continue;
  91         }
  92         freeaddrinfo (ai);
  93         return s;
  94     }
  95     err (1, "failed to connect to %s", hostname);
  96 }
  97
  98 #ifdef KRB4
  99 static int
 100 doit_v4 (char *host, int port)
 101 {
 102     KTEXT_ST ticket;
 103     MSG_DAT msg_data;
 104     CREDENTIALS cred;
 105     des_key_schedule sched;
 106     int ret;
 107     int s = get_socket (host, port);
 108
 109     ret = krb_sendauth(0,
 110                        s,
 111                        &ticket,
 112                        "pop",
 113                        host,
 114                        krb_realmofhost(host),
 115                        getpid(),
 116                        &msg_data,
 117                        &cred,
 118                        sched,
 119                        NULL,
 120                        NULL,
 121                        "KPOPV0.1");
 122     if(ret) {
 123         warnx("krb_sendauth: %s", krb_get_err_text(ret));
 124         return 1;
 125     }
 126     loop(s);
 127     return 0;
 128 }
 129 #endif
 130
 131 #ifdef KRB5
 132 static int
 133 doit_v5 (char *host, int port)
 134 {
 135     krb5_error_code ret;
 136     krb5_context context;
 137     krb5_auth_context auth_context = NULL;
 138     krb5_principal server;
 139     int s = get_socket (host, port);
 140
 141     ret = krb5_init_context (&context);
 142     if (ret)
 143         errx (1, "krb5_init_context failed: %d", ret);
 144
 145     ret = krb5_sname_to_principal (context,
 146                                    host,
 147                                    "pop",
 148                                    KRB5_NT_SRV_HST,
 149                                    &server);
 150     if (ret) {
 151         warnx ("krb5_sname_to_principal: %s",
 152                krb5_get_err_text (context, ret));
 153         return 1;
 154     }
 155     ret = krb5_sendauth (context,
 156                          &auth_context,
 157                          &s,
 158                          "KPOPV1.0",
 159                          NULL,
 160                          server,
 161                          0,
 162                          NULL,
 163                          NULL,
 164                          NULL,
 165                          NULL,
 166                          NULL,
 167                          NULL);
 168      if (ret) {
 169          warnx ("krb5_sendauth: %s",
 170                 krb5_get_err_text (context, ret));
 171          return 1;
 172      }
 173      loop (s);
 174      return 0;
 175 }
 176 #endif
 177
 178
 179 #ifdef KRB4
 180 static int use_v4 = -1;
 181 #endif
 182 #ifdef KRB5
 183 static int use_v5 = -1;
 184 #endif
 185 static char *port_str;
 186 static int do_version;
 187 static int do_help;
 188
 189 struct getargs args[] = {
 190 #ifdef KRB4
 191     { "krb4",   '4', arg_flag,          &use_v4,        "Use Kerberos V4",
 192       NULL },
 193 #endif
 194 #ifdef KRB5
 195     { "krb5",   '5', arg_flag,          &use_v5,        "Use Kerberos V5",
 196       NULL },
 197 #endif
 198     { "port",   'p', arg_string,        &port_str,      "Use this port",
 199       "number-or-service" },
 200     { "version", 0,  arg_flag,          &do_version,    "Print version",
 201       NULL },
 202     { "help",    0,  arg_flag,          &do_help,       NULL,
 203       NULL }
 204 };
 205
 206 static void
 207 usage (int ret)
 208 {
 209     arg_printusage (args,
 210                     sizeof(args) / sizeof(args[0]),
 211                     NULL,
 212                     "hostname");
 213     exit (ret);
 214 }
 215
 216 int
 217 main(int argc, char **argv)
 218 {
 219     int port = 0;
 220     int ret = 1;
 221     int optind = 0;
 222
 223     setprogname(argv[0]);
 224
 225     if (getarg (args, sizeof(args) / sizeof(args[0]), argc, argv,
 226                 &optind))
 227         usage (1);
 228
 229     argc -= optind;
 230     argv += optind;
 231
 232     if (do_help)
 233         usage (0);
 234
 235     if (do_version) {
 236         print_version (NULL);
 237         return 0;
 238     }
 239
 240     if (argc < 1)
 241         usage (1);
 242
 243     if (port_str) {
 244         struct servent *s = roken_getservbyname (port_str, "tcp");
 245
 246         if (s)
 247             port = s->s_port;
 248         else {
 249             char *ptr;
 250
 251             port = strtol (port_str, &ptr, 10);
 252             if (port == 0 && ptr == port_str)
 253                 errx (1, "Bad port `%s'", port_str);
 254             port = htons(port);
 255         }
 256     }
 257     if (port == 0) {
 258 #ifdef KRB5
 259         port = krb5_getportbyname (NULL, "kpop", "tcp", 1109);
 260 #elif defined(KRB4)
 261         port = k_getportbyname ("kpop", "tcp", 1109);
 262 #else
 263 #error must define KRB4 or KRB5
 264 #endif
 265     }
 266
 267 #if defined(KRB4) && defined(KRB5)
 268     if(use_v4 == -1 && use_v5 == 1)
 269         use_v4 = 0;
 270     if(use_v5 == -1 && use_v4 == 1)
 271         use_v5 = 0;
 272 #endif
 273
 274 #ifdef KRB5
 275     if (ret && use_v5) {
 276         ret = doit_v5 (argv[0], port);
 277     }
 278 #endif
 279 #ifdef KRB4
 280     if (ret && use_v4) {
 281         ret = doit_v4 (argv[0], port);
 282     }
 283 #endif
 284     return ret;
 285 }