lib/kadm5/rename_s.c

   1 /*
   2  * Copyright (c) 1997 - 2001, 2003, 2005 - 2005 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
  36 RCSID("$Id$");
  37
  38 struct rename_principal_hook_ctx {
  39     kadm5_server_context *context;
  40     enum kadm5_hook_stage stage;
  41     krb5_error_code code;
  42     krb5_const_principal source, target;
  43 };
  44
  45 static krb5_error_code KRB5_LIB_CALL
  46 rename_principal_hook_cb(krb5_context context,
  47                          const void *hook,
  48                          void *hookctx,
  49                          void *userctx)
  50 {
  51     krb5_error_code ret;
  52     const struct kadm5_hook_ftable *ftable = hook;
  53     struct rename_principal_hook_ctx *ctx = userctx;
  54
  55     ret = ftable->rename(context, hookctx,
  56                          ctx->stage, ctx->code,
  57                          ctx->source, ctx->target);
  58     if (ret != 0 && ret != KRB5_PLUGIN_NO_HANDLE)
  59         _kadm5_s_set_hook_error_message(ctx->context, ret, "rename",
  60                                         hook, ctx->stage);
  61
  62     /* only pre-commit plugins can abort */
  63     if (ret == 0 || ctx->stage == KADM5_HOOK_STAGE_POSTCOMMIT)
  64         ret = KRB5_PLUGIN_NO_HANDLE;
  65
  66     return ret;
  67 }
  68
  69 static kadm5_ret_t
  70 rename_principal_hook(kadm5_server_context *context,
  71                       enum kadm5_hook_stage stage,
  72                       krb5_error_code code,
  73                       krb5_const_principal source,
  74                       krb5_const_principal target)
  75 {
  76     krb5_error_code ret;
  77     struct rename_principal_hook_ctx ctx;
  78
  79     ctx.context = context;
  80     ctx.stage = stage;
  81     ctx.code = code;
  82     ctx.source = source;
  83     ctx.target = target;
  84
  85     ret = _krb5_plugin_run_f(context->context, &kadm5_hook_plugin_data,
  86                              0, &ctx, rename_principal_hook_cb);
  87     if (ret == KRB5_PLUGIN_NO_HANDLE)
  88         ret = 0;
  89
  90     return ret;
  91 }
  92
  93 kadm5_ret_t
  94 kadm5_s_rename_principal(void *server_handle,
  95                          krb5_principal source,
  96                          krb5_principal target)
  97 {
  98     kadm5_server_context *context = server_handle;
  99     kadm5_ret_t ret;
 100     hdb_entry_ex ent;
 101     krb5_principal oldname;
 102     size_t i;
 103
 104     memset(&ent, 0, sizeof(ent));
 105     if (krb5_principal_compare(context->context, source, target))
 106         return KADM5_DUP; /* XXX is this right? */
 107     if (!context->keep_open) {
 108         ret = context->db->hdb_open(context->context, context->db, O_RDWR, 0);
 109         if(ret)
 110             return ret;
 111     }
 112
 113     ret = kadm5_log_init(context);
 114     if (ret)
 115         goto out;
 116
 117     ret = context->db->hdb_fetch_kvno(context->context, context->db,
 118                                       source, HDB_F_GET_ANY|HDB_F_ADMIN_DATA, 0, &ent);
 119     if (ret)
 120         goto out2;
 121     oldname = ent.entry.principal;
 122
 123     ret = rename_principal_hook(context, KADM5_HOOK_STAGE_PRECOMMIT,
 124                                 0, source, target);
 125     if (ret)
 126         goto out3;
 127
 128     ret = _kadm5_set_modifier(context, &ent.entry);
 129     if (ret)
 130         goto out3;
 131     {
 132         /* fix salt */
 133         Salt salt;
 134         krb5_salt salt2;
 135         memset(&salt, 0, sizeof(salt));
 136         krb5_get_pw_salt(context->context, source, &salt2);
 137         salt.type = hdb_pw_salt;
 138         salt.salt = salt2.saltvalue;
 139         for(i = 0; i < ent.entry.keys.len; i++){
 140             if(ent.entry.keys.val[i].salt == NULL){
 141                 ent.entry.keys.val[i].salt =
 142                     malloc(sizeof(*ent.entry.keys.val[i].salt));
 143                 if (ent.entry.keys.val[i].salt == NULL)
 144                     ret = krb5_enomem(context->context);
 145                 else
 146                     ret = copy_Salt(&salt, ent.entry.keys.val[i].salt);
 147                 if (ret)
 148                     break;
 149             }
 150         }
 151         krb5_free_salt(context->context, salt2);
 152     }
 153     if (ret)
 154         goto out3;
 155
 156     /* Borrow target */
 157     ent.entry.principal = target;
 158     ret = hdb_seal_keys(context->context, context->db, &ent.entry);
 159     if (ret)
 160         goto out3;
 161
 162     /* This logs the change for iprop and writes to the HDB */
 163     ret = kadm5_log_rename(context, source, &ent.entry);
 164
 165     (void) rename_principal_hook(context, KADM5_HOOK_STAGE_POSTCOMMIT,
 166                                  ret, source, target);
 167
 168  out3:
 169     ent.entry.principal = oldname; /* Unborrow target */
 170     hdb_free_entry(context->context, &ent);
 171
 172  out2:
 173     (void) kadm5_log_end(context);
 174  out:
 175     if (!context->keep_open) {
 176         kadm5_ret_t ret2;
 177         ret2 = context->db->hdb_close(context->context, context->db);
 178         if (ret == 0 && ret2 != 0)
 179             ret = ret2;
 180     }
 181     return _kadm5_error_code(ret);
 182 }
 183