lib/kadm5/server_hooks.c

   1 /*
   2  * Copyright (c) 2018, AuriStor, Inc.
   3  * All rights reserved.
   4  *
   5  * Redistribution and use in source and binary forms, with or without
   6  * modification, are permitted provided that the following conditions
   7  * are met:
   8  *
   9  * - Redistributions of source code must retain the above copyright
  10  *   notice, this list of conditions and the following disclaimer.
  11  *
  12  * - Redistributions in binary form must reproduce the above copyright
  13  *   notice, this list of conditions and the following disclaimer in
  14  *   the documentation and/or other materials provided with the
  15  *   distribution.
  16  *
  17  * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
  18  * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
  19  * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS
  20  * FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE
  21  * COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT,
  22  * INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
  23  * (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
  24  * SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
  25  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
  26  * STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
  27  * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED
  28  * OF THE POSSIBILITY OF SUCH DAMAGE.
  29  *
  30  */
  31
  32 #include "kadm5_locl.h"
  33
  34 static const char *kadm5_hook_plugin_deps[] = {
  35     "kadm5",
  36     "krb5",
  37     NULL
  38 };
  39
  40 struct heim_plugin_data kadm5_hook_plugin_data = {
  41     "kadm5",
  42     "kadm5_hook",
  43     KADM5_HOOK_VERSION_V1,
  44     kadm5_hook_plugin_deps,
  45     kadm5_get_instance
  46 };
  47
  48 void
  49 _kadm5_s_set_hook_error_message(kadm5_server_context *context,
  50                                 krb5_error_code ret,
  51                                 const char *op,
  52                                 const struct kadm5_hook_ftable *hook,
  53                                 enum kadm5_hook_stage stage)
  54 {
  55     assert(ret != 0);
  56
  57     krb5_set_error_message(context->context, ret,
  58                                "%s hook `%s' failed %s-commit",
  59                                op, hook->name,
  60                                stage == KADM5_HOOK_STAGE_PRECOMMIT ? "pre" : "post");
  61 }
  62
  63 kadm5_ret_t
  64 _kadm5_s_init_hooks(kadm5_server_context *ctx)
  65 {
  66     krb5_context context = ctx->context;
  67     char **dirs;
  68
  69     dirs = krb5_config_get_strings(context, NULL, "kadmin",
  70                                    "plugin_dir", NULL);
  71     if (dirs == NULL)
  72         return 0;
  73
  74     _krb5_load_plugins(context, "kadm5", (const char **)dirs);
  75     krb5_config_free_strings(dirs);
  76
  77     return 0;
  78 }
  79
  80 void
  81 _kadm5_s_free_hooks(kadm5_server_context *ctx)
  82 {
  83     _krb5_unload_plugins(ctx->context, "kadm5");
  84 }
  85
  86 uintptr_t KRB5_LIB_CALL
  87 kadm5_get_instance(const char *libname)
  88 {
  89     static const char *instance = "libkadm5";
  90
  91     if (strcmp(libname, "kadm5") == 0)
  92         return (uintptr_t)instance;
  93     else if (strcmp(libname, "krb5") == 0)
  94         return krb5_get_instance(libname);
  95
  96     return 0;
  97 }