text: /*
   * Copyright 2002-2016 The OpenSSL Project Authors. All Rights Reserved.
   *
   * Licensed under the Apache License 2.0 (the "License").  You may not use
   * this file except in compliance with the License.  You can obtain a copy
   * in the file LICENSE in the source distribution or at
   * https://www.openssl.org/source/license.html
   */
  
  #include "eng_int.h"
  #include <openssl/conf.h>
  
  /* #define ENGINE_CONF_DEBUG */
  
  /* ENGINE config module */
  
  static const char *skip_dot(const char *name)
  {
      const char *p = strchr(name, '.');
  
      if (p != NULL)
          return p + 1;
      return name;
  }
  
  static STACK_OF(ENGINE) *initialized_engines = NULL;
  
  static int int_engine_init(ENGINE *e)
  {
      if (!VR_ENGINE_init(e))
          return 0;
      if (!initialized_engines)
          initialized_engines = sk_VR_ENGINE_new_null();
      if (!initialized_engines || !sk_VR_ENGINE_push(initialized_engines, e)) {
          VR_ENGINE_finish(e);
          return 0;
      }
      return 1;
  }
  
  static int int_engine_configure(const char *name, const char *value, const CONF *cnf)
  {
      int i;
      int ret = 0;
      long do_init = -1;
      STACK_OF(CONF_VALUE) *ecmds;
      CONF_VALUE *ecmd = NULL;
      const char *ctrlname, *ctrlvalue;
      ENGINE *e = NULL;
      int soft = 0;
  
      name = skip_dot(name);
  #ifdef ENGINE_CONF_DEBUG
      fprintf(stderr, "Configuring engine %s\n", name);
  #endif
      /* Value is a section containing ENGINE commands */
      ecmds = VR_NCONF_get_section(cnf, value);
  
      if (!ecmds) {
          ENGINEerr(ENGINE_F_INT_ENGINE_CONFIGURE,
                    ENGINE_R_ENGINE_SECTION_ERROR);
          return 0;
      }
  
      for (i = 0; i < sk_CONF_VALUE_num(ecmds); i++) {
          ecmd = sk_CONF_VALUE_value(ecmds, i);
          ctrlname = skip_dot(ecmd->name);
          ctrlvalue = ecmd->value;
  #ifdef ENGINE_CONF_DEBUG
          fprintf(stderr, "ENGINE conf: doing ctrl(%s,%s)\n", ctrlname,
                  ctrlvalue);
  #endif
  
          /* First handle some special pseudo ctrls */
  
          /* Override engine name to use */
          if (strcmp(ctrlname, "engine_id") == 0)
              name = ctrlvalue;
          else if (strcmp(ctrlname, "soft_load") == 0)
              soft = 1;
          /* Load a dynamic ENGINE */
          else if (strcmp(ctrlname, "dynamic_path") == 0) {
              e = VR_ENGINE_by_id("dynamic");
              if (!e)
                  goto err;
              if (!VR_ENGINE_ctrl_cmd_string(e, "SO_PATH", ctrlvalue, 0))
                  goto err;
              if (!VR_ENGINE_ctrl_cmd_string(e, "LIST_ADD", "2", 0))
                  goto err;
              if (!VR_ENGINE_ctrl_cmd_string(e, "LOAD", NULL, 0))
                  goto err;
          }
          /* ... add other pseudos here ... */
          else {
              /*
               * At this point we need an ENGINE structural reference if we
               * don't already have one.
               */
              if (!e) {
                  e = VR_ENGINE_by_id(name);
                  if (!e && soft) {
                      VR_ERR_clear_error();
                      return 1;
                  }
                  if (!e)
                      goto err;
              }
              /*
               * Allow "EMPTY" to mean no value: this allows a valid "value" to
               * be passed to ctrls of type NO_INPUT
               */
              if (strcmp(ctrlvalue, "EMPTY") == 0)
                  ctrlvalue = NULL;
              if (strcmp(ctrlname, "init") == 0) {
                  if (!VR_NCONF_get_number_e(cnf, value, "init", &do_init))
                      goto err;
                  if (do_init == 1) {
                      if (!int_engine_init(e))
                          goto err;
                  } else if (do_init != 0) {
                      ENGINEerr(ENGINE_F_INT_ENGINE_CONFIGURE,
                                ENGINE_R_INVALID_INIT_VALUE);
                      goto err;
                  }
              } else if (strcmp(ctrlname, "default_algorithms") == 0) {
                  if (!VR_ENGINE_set_default_string(e, ctrlvalue))
                      goto err;
              } else if (!VR_ENGINE_ctrl_cmd_string(e, ctrlname, ctrlvalue, 0))
                  goto err;
          }
  
      }
      if (e && (do_init == -1) && !int_engine_init(e)) {
          ecmd = NULL;
          goto err;
      }
      ret = 1;
   err:
      if (ret != 1) {
          ENGINEerr(ENGINE_F_INT_ENGINE_CONFIGURE,
                    ENGINE_R_ENGINE_CONFIGURATION_ERROR);
          if (ecmd)
              VR_ERR_add_error_data(6, "section=", ecmd->section,
                                 ", name=", ecmd->name,
                                 ", value=", ecmd->value);
      }
      VR_ENGINE_free(e);
      return ret;
  }
  
  static int int_engine_module_init(CONF_IMODULE *md, const CONF *cnf)
  {
      STACK_OF(CONF_VALUE) *elist;
      CONF_VALUE *cval;
      int i;
  #ifdef ENGINE_CONF_DEBUG
      fprintf(stderr, "Called engine module: name %s, value %s\n",
              VR_CONF_imodule_get_name(md), VR_CONF_imodule_get_value(md));
  #endif
      /* Value is a section containing ENGINEs to configure */
      elist = VR_NCONF_get_section(cnf, VR_CONF_imodule_get_value(md));
  
      if (!elist) {
          ENGINEerr(ENGINE_F_INT_ENGINE_MODULE_INIT,
                    ENGINE_R_ENGINES_SECTION_ERROR);
          return 0;
      }
  
      for (i = 0; i < sk_CONF_VALUE_num(elist); i++) {
          cval = sk_CONF_VALUE_value(elist, i);
          if (!int_engine_configure(cval->name, cval->value, cnf))
              return 0;
      }
  
      return 1;
  }
  
  static void int_engine_module_finish(CONF_IMODULE *md)
  {
      ENGINE *e;
  
      while ((e = sk_VR_ENGINE_pop(initialized_engines)))
          VR_ENGINE_finish(e);
      sk_VR_ENGINE_free(initialized_engines);
      initialized_engines = NULL;
  }
  
  void VR_ENGINE_add_conf_module(void)
  {
      VR_CONF_module_add("engines",
                      int_engine_module_init, int_engine_module_finish);
  }
  