kpasswd/kpasswd-generator.c

   1 /*
   2  * Copyright (c) 2000 - 2001 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 "kpasswd_locl.h"
  35
  36 RCSID("$Id$");
  37
  38 static unsigned
  39 read_words (const char *filename, char ***ret_w)
  40 {
  41     unsigned n, alloc;
  42     FILE *f;
  43     char buf[256];
  44     char **w = NULL;
  45
  46     f = fopen (filename, "r");
  47     if (f == NULL)
  48         err (1, "cannot open %s", filename);
  49     alloc = n = 0;
  50     while (fgets (buf, sizeof(buf), f) != NULL) {
  51         if (buf[strlen (buf) - 1] == '\n')
  52             buf[strlen (buf) - 1] = '\0';
  53         if (n >= alloc) {
  54             alloc += 16;
  55             w = erealloc (w, alloc * sizeof(char **));
  56         }
  57         w[n++] = estrdup (buf);
  58     }
  59     *ret_w = w;
  60     return n;
  61 }
  62
  63 static int
  64 nop_prompter (krb5_context context,
  65               void *data,
  66               const char *name,
  67               const char *banner,
  68               int num_prompts,
  69               krb5_prompt prompts[])
  70 {
  71     return 0;
  72 }
  73
  74 static void
  75 generate_requests (const char *filename, unsigned nreq)
  76 {
  77     krb5_context context;
  78     krb5_error_code ret;
  79     int i;
  80     char **words;
  81     unsigned nwords;
  82
  83     ret = krb5_init_context (&context);
  84     if (ret)
  85         errx (1, "krb5_init_context failed: %d", ret);
  86
  87     nwords = read_words (filename, &words);
  88
  89     for (i = 0; i < nreq; ++i) {
  90         char *name = words[rand() % nwords];
  91         krb5_get_init_creds_opt opt;
  92         krb5_creds cred;
  93         krb5_principal principal;
  94         int result_code;
  95         krb5_data result_code_string, result_string;
  96         char *old_pwd, *new_pwd;
  97
  98         krb5_get_init_creds_opt_init (&opt);
  99         krb5_get_init_creds_opt_set_tkt_life (&opt, 300);
 100         krb5_get_init_creds_opt_set_forwardable (&opt, FALSE);
 101         krb5_get_init_creds_opt_set_proxiable (&opt, FALSE);
 102
 103         ret = krb5_parse_name (context, name, &principal);
 104         if (ret)
 105             krb5_err (context, 1, ret, "krb5_parse_name %s", name);
 106
 107         asprintf (&old_pwd, "%s", name);
 108         asprintf (&new_pwd, "%s2", name);
 109
 110         ret = krb5_get_init_creds_password (context,
 111                                             &cred,
 112                                             principal,
 113                                             old_pwd,
 114                                             nop_prompter,
 115                                             NULL,
 116                                             0,
 117                                             "kadmin/changepw",
 118                                             &opt);
 119         if( ret == KRB5KRB_AP_ERR_BAD_INTEGRITY
 120             || ret == KRB5KRB_AP_ERR_MODIFIED) {
 121             char *tmp;
 122
 123             tmp = new_pwd;
 124             new_pwd = old_pwd;
 125             old_pwd = tmp;
 126
 127             ret = krb5_get_init_creds_password (context,
 128                                                 &cred,
 129                                                 principal,
 130                                                 old_pwd,
 131                                                 nop_prompter,
 132                                                 NULL,
 133                                                 0,
 134                                                 "kadmin/changepw",
 135                                                 &opt);
 136         }
 137         if (ret)
 138             krb5_err (context, 1, ret, "krb5_get_init_creds_password");
 139
 140         krb5_free_principal (context, principal);
 141
 142         ret = krb5_change_password (context, &cred, new_pwd,
 143                                     &result_code,
 144                                     &result_code_string,
 145                                     &result_string);
 146         if (ret)
 147             krb5_err (context, 1, ret, "krb5_change_password");
 148
 149         free (old_pwd);
 150         free (new_pwd);
 151         krb5_free_creds_contents (context, &cred);
 152     }
 153 }
 154
 155 static int version_flag = 0;
 156 static int help_flag    = 0;
 157
 158 static struct getargs args[] = {
 159     { "version",        0,   arg_flag, &version_flag },
 160     { "help",           0,   arg_flag, &help_flag }
 161 };
 162
 163 static void
 164 usage (int ret)
 165 {
 166     arg_printusage (args,
 167                     sizeof(args)/sizeof(*args),
 168                     NULL,
 169                     "file [number]");
 170     exit (ret);
 171 }
 172
 173 int
 174 main(int argc, char **argv)
 175 {
 176     int optind = 0;
 177     int nreq;
 178     char *end;
 179
 180     setprogname(argv[0]);
 181     if(getarg(args, sizeof(args) / sizeof(args[0]), argc, argv, &optind))
 182         usage(1);
 183     if (help_flag)
 184         usage (0);
 185     if (version_flag) {
 186         print_version(NULL);
 187         return 0;
 188     }
 189     argc -= optind;
 190     argv += optind;
 191
 192     if (argc != 2)
 193         usage (1);
 194     srand (0);
 195     nreq = strtol (argv[1], &end, 0);
 196     if (argv[1] == end || *end != '\0')
 197         usage (1);
 198     generate_requests (argv[0], nreq);
 199     return 0;
 200 }