kuser/generate-requests.c

   1 /*
   2  * Copyright (c) 2000 - 2004 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 #include "kuser_locl.h"
  35
  36 static unsigned
  37 read_words (const char *filename, char ***ret_w)
  38 {
  39     unsigned n, alloc;
  40     FILE *f;
  41     char buf[256];
  42     char **w = NULL;
  43
  44     f = fopen (filename, "r");
  45     if (f == NULL)
  46         err (1, "cannot open %s", filename);
  47     alloc = n = 0;
  48     while (fgets (buf, sizeof(buf), f) != NULL) {
  49         buf[strcspn(buf, "\r\n")] = '\0';
  50         if (n >= alloc) {
  51             alloc += 16;
  52             w = erealloc (w, alloc * sizeof(char **));
  53         }
  54         w[n++] = estrdup (buf);
  55     }
  56     *ret_w = w;
  57     if (n == 0)
  58         errx(1, "%s is an empty file, no words to try", filename);
  59     fclose(f);
  60     return n;
  61 }
  62
  63 static void
  64 generate_requests (const char *filename, unsigned nreq)
  65 {
  66     krb5_principal client;
  67     krb5_context context;
  68     krb5_error_code ret;
  69     krb5_creds cred;
  70     int i;
  71     char **words;
  72     unsigned nwords;
  73
  74     ret = krb5_init_context (&context);
  75     if (ret)
  76         errx (1, "krb5_init_context failed: %d", ret);
  77
  78     nwords = read_words (filename, &words);
  79
  80     for (i = 0; i < nreq; ++i) {
  81         char *name = words[rand() % nwords];
  82
  83         memset(&cred, 0, sizeof(cred));
  84
  85         ret = krb5_parse_name (context, name, &client);
  86         if (ret)
  87             krb5_err (context, 1, ret, "krb5_parse_name %s", name);
  88
  89         ret = krb5_get_init_creds_password (context, &cred, client, "",
  90                                             NULL, NULL, 0, NULL, NULL);
  91         if (ret)
  92             krb5_free_cred_contents (context, &cred);
  93         krb5_free_principal(context, client);
  94     }
  95     free(words);
  96 }
  97
  98 static int version_flag = 0;
  99 static int help_flag    = 0;
 100
 101 static struct getargs args[] = {
 102     { "version",        0,   arg_flag, &version_flag, NULL, NULL },
 103     { "help",           0,   arg_flag, &help_flag,    NULL, NULL }
 104 };
 105
 106 static void
 107 usage (int ret)
 108 {
 109     arg_printusage (args,
 110                     sizeof(args)/sizeof(*args),
 111                     NULL,
 112                     "file number");
 113     exit (ret);
 114 }
 115
 116 int
 117 main(int argc, char **argv)
 118 {
 119     int optidx = 0;
 120     int nreq;
 121     char *end;
 122
 123     setprogname(argv[0]);
 124     if(getarg(args, sizeof(args) / sizeof(args[0]), argc, argv, &optidx))
 125         usage(1);
 126
 127     if (help_flag)
 128         usage (0);
 129
 130     if(version_flag) {
 131         print_version(NULL);
 132         exit(0);
 133     }
 134
 135     argc -= optidx;
 136     argv += optidx;
 137
 138     if (argc != 2)
 139         usage (1);
 140     srand (0);
 141     nreq = strtol (argv[1], &end, 0);
 142     if (argv[1] == end || *end != '\0')
 143         usage (1);
 144     generate_requests (argv[0], nreq);
 145     return 0;
 146 }