admin/util.c

   1 /*
   2  * Copyright (c) 1997 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. All advertising materials mentioning features or use of this software
  18  *    must display the following acknowledgement:
  19  *      This product includes software developed by Kungliga Tekniska
  20  *      Högskolan and its contributors.
  21  *
  22  * 4. Neither the name of the Institute nor the names of its contributors
  23  *    may be used to endorse or promote products derived from this software
  24  *    without specific prior written permission.
  25  *
  26  * THIS SOFTWARE IS PROVIDED BY THE INSTITUTE AND CONTRIBUTORS ``AS IS'' AND
  27  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
  28  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
  29  * ARE DISCLAIMED.  IN NO EVENT SHALL THE INSTITUTE OR CONTRIBUTORS BE LIABLE
  30  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
  31  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
  32  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
  33  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
  34  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
  35  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
  36  * SUCH DAMAGE.
  37  */
  38
  39 #include "admin_locl.h"
  40 #include <parse_units.h>
  41
  42 void
  43 init_des_key(hdb_entry *ent)
  44 {
  45     Key *k;
  46     ent->keys.val = realloc(ent->keys.val,
  47                             (ent->keys.len + 1) * sizeof(*ent->keys.val));
  48     k = ent->keys.val + ent->keys.len;
  49     ent->keys.len++;
  50     memset(k, 0, sizeof(*k));
  51     krb5_generate_random_keyblock(context, KEYTYPE_DES, &k->key);
  52     seal_key(k);
  53     ent->kvno++;
  54 }
  55
  56 void
  57 set_keys(hdb_entry *ent, char *password)
  58 {
  59     krb5_data salt;
  60     int i;
  61
  62     memset(&salt, 0, sizeof(salt));
  63     krb5_get_salt(ent->principal, &salt);
  64     for(i = 0; i < ent->keys.len; i++) {
  65         krb5_string_to_key(password, &salt, &ent->keys.val[i].key); /* XXX */
  66         seal_key(&ent->keys.val[i]);
  67     }
  68     krb5_data_free(&salt);
  69     ent->kvno++;
  70 }
  71
  72 char *
  73 time2str(time_t t)
  74 {
  75     static char buf[128];
  76     strftime(buf, sizeof(buf), "%Y%m%d%H%M%S", gmtime(&t));
  77     return buf;
  78 }
  79
  80 void
  81 event2string(Event *ev, char **str)
  82 {
  83     char *p;
  84     char *pr;
  85     if(ev == NULL){
  86         *str = strdup("-");
  87         return;
  88     }
  89     krb5_unparse_name(context, ev->principal, &pr);
  90     asprintf(&p, "%s:%s", time2str(ev->time), pr);
  91     free(pr);
  92     *str = p;
  93 }
  94
  95 void
  96 print_hdbflags (FILE *fp, HDBFlags flags)
  97 {
  98     char buf[1024];
  99
 100     unparse_flags (HDBFlags2int(flags), HDBFlags_units, buf, sizeof(buf));
 101     fprintf (fp, "%s", buf);
 102 }
 103
 104 int
 105 parse_hdbflags (const char *s, HDBFlags *flags)
 106 {
 107     int t;
 108
 109     t = parse_flags (s, HDBFlags_units, HDBFlags2int(*flags));
 110     if (t < 0)
 111         return t;
 112     else {
 113         *flags = int2HDBFlags(t);
 114         return 0;
 115     }
 116 }
 117
 118 void
 119 init_entry (HDB *db, hdb_entry *ent)
 120 {
 121     krb5_realm *realm;
 122     krb5_principal def_principal;
 123     hdb_entry def;
 124
 125     realm = krb5_princ_realm(context, ent->principal);
 126     krb5_build_principal(context, &def_principal,
 127                          strlen(*realm),
 128                          *realm,
 129                          "default",
 130                          NULL);
 131     def.principal = def_principal;
 132     if(db->fetch(context, db, &def)) {
 133         krb5_free_principal(context, def_principal);
 134         krb5_make_principal(context, &def_principal, NULL, "default", NULL);
 135         def.principal = def_principal;
 136         if(db->fetch(context, db, &def)){
 137             krb5_warnx(context, "No `default' entry found. "
 138                        "(have you initialised the database?)");
 139             memset(&def, 0, sizeof(def));
 140         }else
 141             krb5_warnx(context, "No `default' principal found for %s, "
 142                        "using local realms default.", *realm);
 143     }
 144     krb5_free_principal (context, def_principal);
 145     ent->flags.client = 1;
 146     ent->flags.server = 1;
 147     ent->flags.forwardable = 1;
 148     ent->flags.proxiable = 1;
 149     ent->flags.renewable = 1;
 150     ent->flags.postdate = 1;
 151     if(def.max_life){
 152         ent->max_life = malloc(sizeof(*ent->max_life));
 153         *ent->max_life = *def.max_life;
 154     }
 155     if(def.max_renew){
 156         ent->max_renew = malloc(sizeof(*ent->max_renew));
 157         *ent->max_renew = *def.max_renew;
 158     }
 159     hdb_free_entry(context, &def);
 160 }
 161
 162 static void
 163 set_event (hdb_entry *ent, Event *ev)
 164 {
 165     krb5_realm *realm;
 166
 167     ev->time = time(NULL);
 168     realm = krb5_princ_realm(context, ent->principal);
 169
 170     krb5_build_principal(context, &ev->principal,
 171                          strlen(*realm),
 172                          *realm,
 173                          "kadmin",
 174                          NULL);
 175 }
 176
 177 void
 178 set_created_by (hdb_entry *ent)
 179 {
 180     set_event (ent, &ent->created_by);
 181 }
 182
 183 void
 184 set_modified_by (hdb_entry *ent)
 185 {
 186     if (ent->modified_by)
 187         free_Event(ent->modified_by);
 188     else
 189         ent->modified_by = malloc(sizeof(*ent->modified_by));
 190     set_event (ent, ent->modified_by);
 191 }
 192
 193 static void
 194 get_life (const char *name, unsigned **v)
 195 {
 196     char buf[128];
 197     time_t t;
 198
 199     if (*v) {
 200         unparse_time (**v, buf, sizeof(buf));
 201         t = getlife (name, buf);
 202     } else {
 203         t = getlife (name, "unlimited");
 204     }
 205     if (t) {
 206         if(*v == NULL)
 207             *v = malloc(sizeof(**v));
 208         **v = t;
 209     } else if(*v) {
 210         free(*v);
 211         *v = NULL;
 212     }
 213 }
 214
 215 static void
 216 get_time (const char *name, time_t **v)
 217 {
 218     /* XXX */
 219 }
 220
 221 static void
 222 get_flags(const char *name, HDBFlags *flags)
 223 {
 224     char buf[1024];
 225
 226     fprintf (stderr, "%s [", name);
 227     print_hdbflags (stderr, *flags);
 228     fprintf (stderr, "]: ");
 229     if(fgets(buf, sizeof(buf), stdin) == NULL)
 230         return;
 231     buf[strlen(buf) - 1] = '\0';
 232     if(*buf != '\0')
 233         parse_hdbflags(buf, flags);
 234 }
 235
 236 void
 237 edit_entry(hdb_entry *ent)
 238 {
 239     get_time ("Valid start",  &ent->valid_start);
 240     get_time ("Valid end",    &ent->valid_end);
 241     get_time ("Password end", &ent->pw_end);
 242     get_life ("Max ticket life", &ent->max_life);
 243     get_life ("Max renewable life", &ent->max_renew);
 244     get_flags ("Flags", &ent->flags);
 245 }
 246
 247 int
 248 set_password(hdb_entry *ent)
 249 {
 250     char buf[128];
 251     int i;
 252
 253     if(des_read_pw_string(buf, sizeof(buf), "Password:", 1))
 254         return -1;
 255     for (i = 0; i < ent->keys.len; ++i)
 256         free_Key (&ent->keys.val[i]);
 257     free (ent->keys.val);
 258     if(strcasecmp(buf, "random") == 0) {
 259         ent->keys.len = 0;
 260         ent->keys.val = NULL;
 261         init_des_key(ent);
 262     } else{
 263         ent->keys.len = 1;
 264         ent->keys.val = calloc(1, sizeof(*ent->keys.val));
 265         set_keys(ent, buf);
 266     }
 267     return 0;
 268 }