kadmin/ank.c

   1 /*
   2  * Copyright (c) 1997-2006 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 "kadmin_locl.h"
  35 #include "kadmin-commands.h"
  36
  37 /*
  38  * fetch the default principal corresponding to `princ'
  39  */
  40
  41 static krb5_error_code
  42 get_default (kadm5_server_context *contextp,
  43              krb5_principal princ,
  44              kadm5_principal_ent_t default_ent)
  45 {
  46     krb5_error_code ret;
  47     krb5_principal def_principal;
  48     krb5_const_realm realm = krb5_principal_get_realm(contextp->context, princ);
  49
  50     ret = krb5_make_principal (contextp->context, &def_principal,
  51                                realm, "default", NULL);
  52     if (ret)
  53         return ret;
  54     ret = kadm5_get_principal (contextp, def_principal, default_ent,
  55                                KADM5_PRINCIPAL_NORMAL_MASK);
  56     krb5_free_principal (contextp->context, def_principal);
  57     return ret;
  58 }
  59
  60 /*
  61  * Add the principal `name' to the database.
  62  * Prompt for all data not given by the input parameters.
  63  */
  64
  65 static krb5_error_code
  66 add_one_principal(const char *name,
  67                   int rand_key,
  68                   int rand_password,
  69                   int use_defaults,
  70                   char *password,
  71                   char *policy,
  72                   size_t nkstuple,
  73                   krb5_key_salt_tuple *kstuple,
  74                   krb5_key_data *key_data,
  75                   const char *max_ticket_life,
  76                   const char *max_renewable_life,
  77                   const char *attributes,
  78                   const char *expiration,
  79                   const char *pw_expiration)
  80 {
  81     krb5_error_code ret;
  82     kadm5_principal_ent_rec princ, defrec;
  83     kadm5_principal_ent_rec *default_ent = NULL;
  84     krb5_principal princ_ent = NULL;
  85     krb5_timestamp pw_expire;
  86     int mask = 0;
  87     int default_mask = 0;
  88     char pwbuf[1024];
  89
  90     memset(&princ, 0, sizeof(princ));
  91     ret = krb5_parse_name(context, name, &princ_ent);
  92     if (ret) {
  93         krb5_warn(context, ret, "krb5_parse_name");
  94         return ret;
  95     }
  96     princ.principal = princ_ent;
  97     mask |= KADM5_PRINCIPAL;
  98
  99     ret = set_entry(context, &princ, &mask,
 100                     max_ticket_life, max_renewable_life,
 101                     expiration, pw_expiration, attributes, policy);
 102     if (ret)
 103         goto out;
 104
 105     default_ent = &defrec;
 106     ret = get_default (kadm_handle, princ_ent, default_ent);
 107     if (ret) {
 108         default_ent  = NULL;
 109         default_mask = 0;
 110     } else {
 111         default_mask = KADM5_ATTRIBUTES | KADM5_MAX_LIFE | KADM5_MAX_RLIFE |
 112             KADM5_PRINC_EXPIRE_TIME | KADM5_PW_EXPIRATION;
 113     }
 114
 115     if(use_defaults)
 116         set_defaults(&princ, &mask, default_ent, default_mask);
 117     else
 118         if(edit_entry(&princ, &mask, default_ent, default_mask))
 119             goto out;
 120     if(rand_key || key_data) {
 121         princ.attributes |= KRB5_KDB_DISALLOW_ALL_TIX;
 122         mask |= KADM5_ATTRIBUTES;
 123         random_password (pwbuf, sizeof(pwbuf));
 124         password = pwbuf;
 125     } else if (rand_password) {
 126         random_password (pwbuf, sizeof(pwbuf));
 127         password = pwbuf;
 128     } else if(password == NULL) {
 129         char *princ_name;
 130         char *prompt;
 131         int aret;
 132
 133         ret = krb5_unparse_name(context, princ_ent, &princ_name);
 134         if (ret)
 135             goto out;
 136         aret = asprintf (&prompt, "%s's Password: ", princ_name);
 137         free (princ_name);
 138         if (aret == -1) {
 139             ret = ENOMEM;
 140             krb5_set_error_message(context, ret, "out of memory");
 141             goto out;
 142         }
 143         ret = UI_UTIL_read_pw_string (pwbuf, sizeof(pwbuf), prompt,
 144                                       UI_UTIL_FLAG_VERIFY |
 145                                       UI_UTIL_FLAG_VERIFY_SILENT);
 146         free (prompt);
 147         if (ret) {
 148             ret = KRB5_LIBOS_BADPWDMATCH;
 149             krb5_set_error_message(context, ret, "failed to verify password");
 150             goto out;
 151         }
 152         password = pwbuf;
 153     }
 154
 155     ret = kadm5_create_principal(kadm_handle, &princ, mask, password);
 156     if(ret) {
 157         krb5_warn(context, ret, "kadm5_create_principal");
 158         goto out;
 159     }
 160     /* Save requested password expiry before it's clobbered */
 161     pw_expire = princ.pw_expiration;
 162     if (rand_key) {
 163         krb5_keyblock *new_keys;
 164         int n_keys, i;
 165         ret = kadm5_randkey_principal_3(kadm_handle, princ_ent, 0,
 166                                         nkstuple, kstuple, &new_keys, &n_keys);
 167         if(ret){
 168             krb5_warn(context, ret, "kadm5_randkey_principal");
 169             n_keys = 0;
 170         }
 171         for(i = 0; i < n_keys; i++)
 172             krb5_free_keyblock_contents(context, &new_keys[i]);
 173         if (n_keys > 0)
 174             free(new_keys);
 175         kadm5_get_principal(kadm_handle, princ_ent, &princ,
 176                             KADM5_PRINCIPAL | KADM5_KVNO | KADM5_ATTRIBUTES);
 177         krb5_free_principal(context, princ_ent);
 178         princ_ent = princ.principal;
 179         princ.attributes &= (~KRB5_KDB_DISALLOW_ALL_TIX);
 180         princ.pw_expiration = pw_expire;
 181         /*
 182          * Updating kvno w/o key data and vice-versa gives _kadm5_setup_entry()
 183          * and _kadm5_set_keys2() headaches.  But we used to, so we handle
 184          * this in in those two functions.  Might as well leave this code as
 185          * it was then.
 186          */
 187         princ.kvno = 1;
 188         kadm5_modify_principal(kadm_handle, &princ,
 189                                KADM5_PW_EXPIRATION | KADM5_ATTRIBUTES | KADM5_KVNO);
 190     } else if (key_data) {
 191         ret = kadm5_chpass_principal_with_key (kadm_handle, princ_ent,
 192                                                3, key_data);
 193         if (ret) {
 194             krb5_warn(context, ret, "kadm5_chpass_principal_with_key");
 195         }
 196         kadm5_get_principal(kadm_handle, princ_ent, &princ,
 197                             KADM5_PRINCIPAL | KADM5_ATTRIBUTES);
 198         krb5_free_principal(context, princ_ent);
 199         princ_ent = princ.principal;
 200         princ.attributes &= (~KRB5_KDB_DISALLOW_ALL_TIX);
 201         princ.pw_expiration = pw_expire;
 202         kadm5_modify_principal(kadm_handle, &princ,
 203                                KADM5_PW_EXPIRATION | KADM5_ATTRIBUTES);
 204     } else if (rand_password) {
 205         char *princ_name;
 206
 207         krb5_unparse_name(context, princ_ent, &princ_name);
 208         printf ("added %s with password \"%s\"\n", princ_name, password);
 209         free (princ_name);
 210     }
 211 out:
 212     kadm5_free_principal_ent(kadm_handle, &princ); /* frees princ_ent */
 213     if(default_ent)
 214         kadm5_free_principal_ent (kadm_handle, default_ent);
 215     if (password != NULL)
 216         memset (password, 0, strlen(password));
 217     return ret;
 218 }
 219
 220 /*
 221  * parse the string `key_string' into `key', returning 0 iff succesful.
 222  */
 223
 224 /*
 225  * the ank command
 226  */
 227
 228 /*
 229  * Parse arguments and add all the principals.
 230  */
 231
 232 int
 233 add_new_key(struct add_options *opt, int argc, char **argv)
 234 {
 235     krb5_error_code ret = 0;
 236     krb5_key_salt_tuple *kstuple = NULL;
 237     krb5_key_data key_data[3];
 238     krb5_key_data *kdp = NULL;
 239     const char *enctypes;
 240     size_t i, nkstuple;
 241     int num;
 242
 243     num = 0;
 244     if (opt->random_key_flag)
 245         ++num;
 246     if (opt->random_password_flag)
 247         ++num;
 248     if (opt->password_string)
 249         ++num;
 250     if (opt->key_string)
 251         ++num;
 252
 253     if (num > 1) {
 254         fprintf (stderr, "give only one of "
 255                 "--random-key, --random-password, --password, --key\n");
 256         return 1;
 257     }
 258
 259     enctypes = opt->enctypes_string;
 260     if (enctypes == NULL || enctypes[0] == '\0')
 261         enctypes = krb5_config_get_string(context, NULL, "libdefaults",
 262                                           "supported_enctypes", NULL);
 263     if (enctypes == NULL || enctypes[0] == '\0')
 264         enctypes = "aes128-cts-hmac-sha1-96";
 265     ret = krb5_string_to_keysalts2(context, enctypes, &nkstuple, &kstuple);
 266     if (ret) {
 267         fprintf(stderr, "enctype(s) unknown\n");
 268         return ret;
 269     }
 270
 271
 272     if (opt->key_string) {
 273         const char *error;
 274
 275         if (parse_des_key (opt->key_string, key_data, &error)) {
 276             fprintf(stderr, "failed parsing key \"%s\": %s\n",
 277                     opt->key_string, error);
 278             free(kstuple);
 279             return 1;
 280         }
 281         kdp = key_data;
 282     }
 283
 284     for(i = 0; i < argc; i++) {
 285         ret = add_one_principal(argv[i],
 286                                 opt->random_key_flag,
 287                                 opt->random_password_flag,
 288                                 opt->use_defaults_flag,
 289                                 opt->password_string,
 290                                 opt->policy_string,
 291                                 nkstuple,
 292                                 kstuple,
 293                                 kdp,
 294                                 opt->max_ticket_life_string,
 295                                 opt->max_renewable_life_string,
 296                                 opt->attributes_string,
 297                                 opt->expiration_time_string,
 298                                 opt->pw_expiration_time_string);
 299         if (ret) {
 300             krb5_warn (context, ret, "adding %s", argv[i]);
 301             break;
 302         }
 303     }
 304     if (kdp) {
 305         int16_t dummy = 3;
 306         kadm5_free_key_data (kadm_handle, &dummy, key_data);
 307     }
 308     free(kstuple);
 309     return ret != 0;
 310 }