lib/kadm5/delete_s.c

   1 /*
   2  * Copyright (c) 1997 - 2001, 2003, 2005 - 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
  36 RCSID("$Id$");
  37
  38 struct delete_principal_hook_ctx {
  39     kadm5_server_context *context;
  40     enum kadm5_hook_stage stage;
  41     krb5_error_code code;
  42     krb5_const_principal princ;
  43 };
  44
  45 static krb5_error_code KRB5_LIB_CALL
  46 delete_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 delete_principal_hook_ctx *ctx = userctx;
  54
  55     ret = ftable->delete(context, hookctx,
  56                          ctx->stage, ctx->code, ctx->princ);
  57     if (ret != 0 && ret != KRB5_PLUGIN_NO_HANDLE)
  58         _kadm5_s_set_hook_error_message(ctx->context, ret, "delete",
  59                                         hook, ctx->stage);
  60
  61     /* only pre-commit plugins can abort */
  62     if (ret == 0 || ctx->stage == KADM5_HOOK_STAGE_POSTCOMMIT)
  63         ret = KRB5_PLUGIN_NO_HANDLE;
  64
  65     return ret;
  66 }
  67
  68 static kadm5_ret_t
  69 delete_principal_hook(kadm5_server_context *context,
  70                       enum kadm5_hook_stage stage,
  71                       krb5_error_code code,
  72                       krb5_const_principal princ)
  73 {
  74     krb5_error_code ret;
  75     struct delete_principal_hook_ctx ctx;
  76
  77     ctx.context = context;
  78     ctx.stage = stage;
  79     ctx.code = code;
  80     ctx.princ = princ;
  81
  82     ret = _krb5_plugin_run_f(context->context, &kadm5_hook_plugin_data,
  83                              0, &ctx, delete_principal_hook_cb);
  84     if (ret == KRB5_PLUGIN_NO_HANDLE)
  85         ret = 0;
  86
  87     return ret;
  88 }
  89
  90 kadm5_ret_t
  91 kadm5_s_delete_principal(void *server_handle, krb5_principal princ)
  92 {
  93     kadm5_server_context *context = server_handle;
  94     kadm5_ret_t ret;
  95     hdb_entry ent;
  96
  97     memset(&ent, 0, sizeof(ent));
  98     if (!context->keep_open) {
  99         ret = context->db->hdb_open(context->context, context->db, O_RDWR, 0);
 100         if(ret) {
 101             krb5_warn(context->context, ret, "opening database");
 102             return ret;
 103         }
 104     }
 105
 106     ret = kadm5_log_init(context);
 107     if (ret)
 108         goto out;
 109
 110     ret = context->db->hdb_fetch_kvno(context->context, context->db, princ,
 111                                       HDB_F_DECRYPT|HDB_F_GET_ANY|HDB_F_ADMIN_DATA,
 112                                       0, &ent);
 113     if (ret == HDB_ERR_NOENTRY)
 114         goto out2;
 115     if (ent.flags.immutable) {
 116         ret = KADM5_PROTECT_PRINCIPAL;
 117         goto out3;
 118     }
 119
 120     ret = delete_principal_hook(context, KADM5_HOOK_STAGE_PRECOMMIT, 0, princ);
 121     if (ret)
 122         goto out3;
 123
 124     ret = hdb_seal_keys(context->context, context->db, &ent);
 125     if (ret)
 126         goto out3;
 127
 128     /* This logs the change for iprop and writes to the HDB */
 129     ret = kadm5_log_delete(context, princ);
 130
 131     (void) delete_principal_hook(context, KADM5_HOOK_STAGE_POSTCOMMIT, ret, princ);
 132
 133  out3:
 134     hdb_free_entry(context->context, context->db, &ent);
 135  out2:
 136     (void) kadm5_log_end(context);
 137  out:
 138     if (!context->keep_open) {
 139         kadm5_ret_t ret2;
 140         ret2 = context->db->hdb_close(context->context, context->db);
 141         if (ret == 0 && ret2 != 0)
 142             ret = ret2;
 143     }
 144     return _kadm5_error_code(ret);
 145 }