lib/kadm5/get_s.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 "kadm5_locl.h"
  35 #include <assert.h>
  36
  37 RCSID("$Id$");
  38
  39 static kadm5_ret_t
  40 add_tl_data(kadm5_principal_ent_t ent, int16_t type,
  41             const void *data, size_t size)
  42 {
  43     krb5_tl_data *tl;
  44
  45     tl = calloc(1, sizeof(*tl));
  46     if (tl == NULL)
  47         return _kadm5_error_code(ENOMEM);
  48
  49     tl->tl_data_type = type;
  50     tl->tl_data_length = size;
  51     tl->tl_data_contents = malloc(size);
  52     if (tl->tl_data_contents == NULL && size != 0) {
  53         free(tl);
  54         return _kadm5_error_code(ENOMEM);
  55     }
  56     memcpy(tl->tl_data_contents, data, size);
  57
  58     tl->tl_data_next = ent->tl_data;
  59     ent->tl_data = tl;
  60     ent->n_tl_data++;
  61
  62     return 0;
  63 }
  64
  65 KRB5_LIB_FUNCTION krb5_ssize_t KRB5_LIB_CALL
  66 _krb5_put_int(void *buffer, unsigned long value, size_t size); /* XXX */
  67
  68 static
  69 krb5_error_code
  70 copy_keyset_to_kadm5(kadm5_server_context *context, krb5_kvno kvno,
  71                      size_t n_keys, Key *keys, krb5_salt *salt,
  72                      kadm5_principal_ent_t out)
  73 {
  74     size_t i;
  75     Key *key;
  76     krb5_key_data *kd;
  77     krb5_data *sp;
  78     krb5_error_code ret = 0;
  79
  80     for (i = 0; i < n_keys; i++) {
  81         key = &keys[i];
  82         kd = &out->key_data[out->n_key_data];
  83         kd->key_data_ver = 2;
  84         kd->key_data_kvno = kvno;
  85         kd->key_data_type[0] = key->key.keytype;
  86         if(key->salt)
  87             kd->key_data_type[1] = key->salt->type;
  88         else
  89             kd->key_data_type[1] = KRB5_PADATA_PW_SALT;
  90         /* setup key */
  91         kd->key_data_length[0] = key->key.keyvalue.length;
  92         kd->key_data_contents[0] = malloc(kd->key_data_length[0]);
  93         if(kd->key_data_contents[0] == NULL && kd->key_data_length[0] != 0){
  94             ret = ENOMEM;
  95             break;
  96         }
  97         memcpy(kd->key_data_contents[0], key->key.keyvalue.data,
  98                kd->key_data_length[0]);
  99         /* setup salt */
 100         if(key->salt)
 101             sp = &key->salt->salt;
 102         else
 103             sp = &salt->saltvalue;
 104         kd->key_data_length[1] = sp->length;
 105         kd->key_data_contents[1] = malloc(kd->key_data_length[1]);
 106         if(kd->key_data_length[1] != 0
 107            && kd->key_data_contents[1] == NULL) {
 108             memset(kd->key_data_contents[0], 0, kd->key_data_length[0]);
 109             ret = ENOMEM;
 110             break;
 111         }
 112         memcpy(kd->key_data_contents[1], sp->data, kd->key_data_length[1]);
 113         out->n_key_data++;
 114     }
 115
 116     return ret;
 117 }
 118
 119 kadm5_ret_t
 120 kadm5_s_get_principal(void *server_handle,
 121                       krb5_principal princ,
 122                       kadm5_principal_ent_t out,
 123                       uint32_t mask)
 124 {
 125     kadm5_server_context *context = server_handle;
 126     kadm5_ret_t ret;
 127     hdb_entry_ex ent;
 128
 129     memset(&ent, 0, sizeof(ent));
 130     ret = context->db->hdb_open(context->context, context->db, O_RDONLY, 0);
 131     if(ret)
 132         return ret;
 133     ret = context->db->hdb_fetch_kvno(context->context, context->db, princ,
 134                                       HDB_F_DECRYPT|HDB_F_ALL_KVNOS|
 135                                       HDB_F_GET_ANY|HDB_F_ADMIN_DATA, 0, &ent);
 136     context->db->hdb_close(context->context, context->db);
 137     if(ret)
 138         return _kadm5_error_code(ret);
 139
 140     memset(out, 0, sizeof(*out));
 141     if(mask & KADM5_PRINCIPAL)
 142         ret  = krb5_copy_principal(context->context, ent.entry.principal,
 143                                    &out->principal);
 144     if(ret)
 145         goto out;
 146     if(mask & KADM5_PRINC_EXPIRE_TIME && ent.entry.valid_end)
 147         out->princ_expire_time = *ent.entry.valid_end;
 148     if(mask & KADM5_PW_EXPIRATION && ent.entry.pw_end)
 149         out->pw_expiration = *ent.entry.pw_end;
 150     if(mask & KADM5_LAST_PWD_CHANGE)
 151         hdb_entry_get_pw_change_time(&ent.entry, &out->last_pwd_change);
 152     if(mask & KADM5_ATTRIBUTES){
 153         out->attributes |= ent.entry.flags.postdate ? 0 : KRB5_KDB_DISALLOW_POSTDATED;
 154         out->attributes |= ent.entry.flags.forwardable ? 0 : KRB5_KDB_DISALLOW_FORWARDABLE;
 155         out->attributes |= ent.entry.flags.initial ? KRB5_KDB_DISALLOW_TGT_BASED : 0;
 156         out->attributes |= ent.entry.flags.renewable ? 0 : KRB5_KDB_DISALLOW_RENEWABLE;
 157         out->attributes |= ent.entry.flags.proxiable ? 0 : KRB5_KDB_DISALLOW_PROXIABLE;
 158         out->attributes |= ent.entry.flags.invalid ? KRB5_KDB_DISALLOW_ALL_TIX : 0;
 159         out->attributes |= ent.entry.flags.require_preauth ? KRB5_KDB_REQUIRES_PRE_AUTH : 0;
 160         out->attributes |= ent.entry.flags.server ? 0 : KRB5_KDB_DISALLOW_SVR;
 161         out->attributes |= ent.entry.flags.change_pw ? KRB5_KDB_PWCHANGE_SERVICE : 0;
 162         out->attributes |= ent.entry.flags.ok_as_delegate ? KRB5_KDB_OK_AS_DELEGATE : 0;
 163         out->attributes |= ent.entry.flags.trusted_for_delegation ? KRB5_KDB_TRUSTED_FOR_DELEGATION : 0;
 164         out->attributes |= ent.entry.flags.allow_kerberos4 ? KRB5_KDB_ALLOW_KERBEROS4 : 0;
 165         out->attributes |= ent.entry.flags.allow_digest ? KRB5_KDB_ALLOW_DIGEST : 0;
 166     }
 167     if(mask & KADM5_MAX_LIFE) {
 168         if(ent.entry.max_life)
 169             out->max_life = *ent.entry.max_life;
 170         else
 171             out->max_life = INT_MAX;
 172     }
 173     if(mask & KADM5_MOD_TIME) {
 174         if(ent.entry.modified_by)
 175             out->mod_date = ent.entry.modified_by->time;
 176         else
 177             out->mod_date = ent.entry.created_by.time;
 178     }
 179     if(mask & KADM5_MOD_NAME) {
 180         if(ent.entry.modified_by) {
 181             if (ent.entry.modified_by->principal != NULL)
 182                 ret = krb5_copy_principal(context->context,
 183                                           ent.entry.modified_by->principal,
 184                                           &out->mod_name);
 185         } else if(ent.entry.created_by.principal != NULL)
 186             ret = krb5_copy_principal(context->context,
 187                                       ent.entry.created_by.principal,
 188                                       &out->mod_name);
 189         else
 190             out->mod_name = NULL;
 191     }
 192     if(ret)
 193         goto out;
 194
 195     if(mask & KADM5_KVNO)
 196         out->kvno = ent.entry.kvno;
 197     if(mask & KADM5_MKVNO) {
 198         size_t n;
 199         out->mkvno = 0; /* XXX */
 200         for(n = 0; n < ent.entry.keys.len; n++)
 201             if(ent.entry.keys.val[n].mkvno) {
 202                 out->mkvno = *ent.entry.keys.val[n].mkvno; /* XXX this isn't right */
 203                 break;
 204             }
 205     }
 206 #if 0 /* XXX implement */
 207     if(mask & KADM5_AUX_ATTRIBUTES)
 208         ;
 209     if(mask & KADM5_LAST_SUCCESS)
 210         ;
 211     if(mask & KADM5_LAST_FAILED)
 212         ;
 213     if(mask & KADM5_FAIL_AUTH_COUNT)
 214         ;
 215 #endif
 216     if(mask & KADM5_POLICY) {
 217         HDB_extension *ext;
 218
 219         ext = hdb_find_extension(&ent.entry, choice_HDB_extension_data_policy);
 220         if (ext == NULL) {
 221             out->policy = strdup("default");
 222             /* It's OK if we retun NULL instead of "default" */
 223         } else {
 224             out->policy = strdup(ext->data.u.policy);
 225             if (out->policy == NULL) {
 226                 ret = ENOMEM;
 227                 goto out;
 228             }
 229         }
 230     }
 231     if(mask & KADM5_MAX_RLIFE) {
 232         if(ent.entry.max_renew)
 233             out->max_renewable_life = *ent.entry.max_renew;
 234         else
 235             out->max_renewable_life = INT_MAX;
 236     }
 237     if(mask & KADM5_KEY_DATA){
 238         size_t i;
 239         size_t n_keys = ent.entry.keys.len;
 240         krb5_salt salt;
 241         HDB_extension *ext;
 242         HDB_Ext_KeySet *hist_keys = NULL;
 243
 244         ext = hdb_find_extension(&ent.entry, choice_HDB_extension_data_hist_keys);
 245         if (ext != NULL)
 246             hist_keys = &ext->data.u.hist_keys;
 247
 248         krb5_get_pw_salt(context->context, ent.entry.principal, &salt);
 249         for (i = 0; hist_keys != NULL && i < hist_keys->len; i++)
 250             n_keys += hist_keys->val[i].keys.len;
 251         out->key_data = malloc(n_keys * sizeof(*out->key_data));
 252         if (out->key_data == NULL && n_keys != 0) {
 253             ret = ENOMEM;
 254             goto out;
 255         }
 256         out->n_key_data = 0;
 257         ret = copy_keyset_to_kadm5(context, ent.entry.kvno, ent.entry.keys.len,
 258                                    ent.entry.keys.val, &salt, out);
 259         if (ret)
 260             goto out;
 261         for (i = 0; hist_keys != NULL && i < hist_keys->len; i++) {
 262             ret = copy_keyset_to_kadm5(context, hist_keys->val[i].kvno,
 263                                        hist_keys->val[i].keys.len,
 264                                        hist_keys->val[i].keys.val,
 265                                        &salt, out);
 266             if (ret)
 267                 goto out;
 268         }
 269         krb5_free_salt(context->context, salt);
 270         assert( out->n_key_data == n_keys );
 271     }
 272     if(ret){
 273         kadm5_free_principal_ent(context, out);
 274         goto out;
 275     }
 276     if(mask & KADM5_TL_DATA) {
 277         time_t last_pw_expire;
 278         const HDB_Ext_PKINIT_acl *acl;
 279         const HDB_Ext_Aliases *aliases;
 280
 281         ret = hdb_entry_get_pw_change_time(&ent.entry, &last_pw_expire);
 282         if (ret == 0 && last_pw_expire) {
 283             unsigned char buf[4];
 284             _krb5_put_int(buf, last_pw_expire, sizeof(buf));
 285             ret = add_tl_data(out, KRB5_TL_LAST_PWD_CHANGE, buf, sizeof(buf));
 286         }
 287         if(ret){
 288             kadm5_free_principal_ent(context, out);
 289             goto out;
 290         }
 291         /*
 292          * If the client was allowed to get key data, let it have the
 293          * password too.
 294          */
 295         if(mask & KADM5_KEY_DATA) {
 296             heim_utf8_string pw;
 297
 298             ret = hdb_entry_get_password(context->context,
 299                                          context->db, &ent.entry, &pw);
 300             if (ret == 0) {
 301                 ret = add_tl_data(out, KRB5_TL_PASSWORD, pw, strlen(pw) + 1);
 302                 free(pw);
 303             }
 304             krb5_clear_error_message(context->context);
 305         }
 306
 307         ret = hdb_entry_get_pkinit_acl(&ent.entry, &acl);
 308         if (ret == 0 && acl) {
 309             krb5_data buf;
 310             size_t len;
 311
 312             ASN1_MALLOC_ENCODE(HDB_Ext_PKINIT_acl, buf.data, buf.length,
 313                                 acl, &len, ret);
 314             if (ret) {
 315                 kadm5_free_principal_ent(context, out);
 316                 goto out;
 317             }
 318             if (len != buf.length)
 319                 krb5_abortx(context->context,
 320                             "internal ASN.1 encoder error");
 321             ret = add_tl_data(out, KRB5_TL_PKINIT_ACL, buf.data, buf.length);
 322             free(buf.data);
 323             if (ret) {
 324                 kadm5_free_principal_ent(context, out);
 325                 goto out;
 326             }
 327         }
 328         if(ret){
 329             kadm5_free_principal_ent(context, out);
 330             goto out;
 331         }
 332
 333         ret = hdb_entry_get_aliases(&ent.entry, &aliases);
 334         if (ret == 0 && aliases) {
 335             krb5_data buf;
 336             size_t len;
 337
 338             ASN1_MALLOC_ENCODE(HDB_Ext_Aliases, buf.data, buf.length,
 339                                aliases, &len, ret);
 340             if (ret) {
 341                 kadm5_free_principal_ent(context, out);
 342                 goto out;
 343             }
 344             if (len != buf.length)
 345                 krb5_abortx(context->context,
 346                             "internal ASN.1 encoder error");
 347             ret = add_tl_data(out, KRB5_TL_ALIASES, buf.data, buf.length);
 348             free(buf.data);
 349             if (ret) {
 350                 kadm5_free_principal_ent(context, out);
 351                 goto out;
 352             }
 353         }
 354         if(ret){
 355             kadm5_free_principal_ent(context, out);
 356             goto out;
 357         }
 358
 359     }
 360 out:
 361     hdb_free_entry(context->context, &ent);
 362
 363     return _kadm5_error_code(ret);
 364 }