text:  
  /* crypto/engine/enginetest.c */
  /* Written by Geoff Thorpe (geoff@geoffthorpe.net) for the OpenSSL
   * project 2000.
   */
  /* ====================================================================
   * Copyright (c) 1999-2001 The OpenSSL Project.  All rights reserved.
   *
   * Redistribution and use in source and binary forms, with or without
   * modification, are permitted provided that the following conditions
   * are met:
   *
   * 1. Redistributions of source code must retain the above copyright
   *    notice, this list of conditions and the following disclaimer. 
   *
   * 2. Redistributions in binary form must reproduce the above copyright
   *    notice, this list of conditions and the following disclaimer in
   *    the documentation and/or other materials provided with the
   *    distribution.
   *
   * 3. All advertising materials mentioning features or use of this
   *    software must display the following acknowledgment:
   *    "This product includes software developed by the OpenSSL Project
   *    for use in the OpenSSL Toolkit. (http://www.OpenSSL.org/)"
   *
   * 4. The names "OpenSSL Toolkit" and "OpenSSL Project" must not be used to
   *    endorse or promote products derived from this software without
   *    prior written permission. For written permission, please contact
   *    licensing@OpenSSL.org.
   *
   * 5. Products derived from this software may not be called "OpenSSL"
   *    nor may "OpenSSL" appear in their names without prior written
   *    permission of the OpenSSL Project.
   *
   * 6. Redistributions of any form whatsoever must retain the following
   *    acknowledgment:
   *    "This product includes software developed by the OpenSSL Project
   *    for use in the OpenSSL Toolkit (http://www.OpenSSL.org/)"
   *
   * THIS SOFTWARE IS PROVIDED BY THE OpenSSL PROJECT ``AS IS'' AND ANY
   * EXPRESSED OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
   * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
   * PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL THE OpenSSL PROJECT OR
   * ITS CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
   * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
   * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
   * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
   * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
   * STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
   * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED
   * OF THE POSSIBILITY OF SUCH DAMAGE.
   * ====================================================================
   *
   * This product includes cryptographic software written by Eric Young
   * (eay@cryptsoft.com).  This product includes software written by Tim
   * Hudson (tjh@cryptsoft.com).
   *
   */
  
  #include <stdio.h>
  #include <string.h>
  #include <openssl/e_os2.h>
  
  #ifdef OPENSSL_NO_ENGINE
  int main(int argc, char *argv[])
  {
      printf("No ENGINE support\n");
      return(0);
  }
  #else
  #include <openssl/buffer.h>
  #include <openssl/crypto.h>
  #include <openssl/engine.h>
  #include <openssl/err.h>
  
  static void display_engine_list(void)
  	{
  	ENGINE *h;
  	int loop;
  
  	h = ENGINE_get_first();
  	loop = 0;
  	printf("listing available engine types\n");
  	while(h)
  		{
  		printf("engine %i, id = \"%s\", name = \"%s\"\n",
  			loop++, ENGINE_get_id(h), ENGINE_get_name(h));
  		h = ENGINE_get_next(h);
  		}
  	printf("end of list\n");
  	/* ENGINE_get_first() increases the struct_ref counter, so we 
             must call ENGINE_free() to decrease it again */
  	ENGINE_free(h);
  	}
  
  int main(int argc, char *argv[])
  	{
  	ENGINE *block[512];
  	char buf[256];
  	const char *id, *name;
  	ENGINE *ptr;
  	int loop;
  	int to_return = 1;
  	ENGINE *new_h1 = NULL;
  	ENGINE *new_h2 = NULL;
  	ENGINE *new_h3 = NULL;
  	ENGINE *new_h4 = NULL;
  
  	/* enable memory leak checking unless explicitly disabled */
  	if (!((getenv("OPENSSL_DEBUG_MEMORY") != NULL) && (0 == strcmp(getenv("OPENSSL_DEBUG_MEMORY"), "off"))))
  		{
  		CRYPTO_malloc_debug_init();
  		CRYPTO_set_mem_debug_options(V_CRYPTO_MDEBUG_ALL);
  		}
  	else
  		{
  		/* OPENSSL_DEBUG_MEMORY=off */
  		CRYPTO_set_mem_debug_functions(0, 0, 0, 0, 0);
  		}
  	CRYPTO_mem_ctrl(CRYPTO_MEM_CHECK_ON);
  	ERR_load_crypto_strings();
  
  	memset(block, 0, 512 * sizeof(ENGINE *));
  	if(((new_h1 = ENGINE_new()) == NULL) ||
  			!ENGINE_set_id(new_h1, "test_id0") ||
  			!ENGINE_set_name(new_h1, "First test item") ||
  			((new_h2 = ENGINE_new()) == NULL) ||
  			!ENGINE_set_id(new_h2, "test_id1") ||
  			!ENGINE_set_name(new_h2, "Second test item") ||
  			((new_h3 = ENGINE_new()) == NULL) ||
  			!ENGINE_set_id(new_h3, "test_id2") ||
  			!ENGINE_set_name(new_h3, "Third test item") ||
  			((new_h4 = ENGINE_new()) == NULL) ||
  			!ENGINE_set_id(new_h4, "test_id3") ||
  			!ENGINE_set_name(new_h4, "Fourth test item"))
  		{
  		printf("Couldn't set up test ENGINE structures\n");
  		goto end;
  		}
  	printf("\nenginetest beginning\n\n");
  	display_engine_list();
  	if(!ENGINE_add(new_h1))
  		{
  		printf("Add failed!\n");
  		goto end;
  		}
  	display_engine_list();
  	ptr = ENGINE_get_first();
  	if(!ENGINE_remove(ptr))
  		{
  		printf("Remove failed!\n");
  		goto end;
  		}
  	if (ptr)
  		ENGINE_free(ptr);
  	display_engine_list();
  	if(!ENGINE_add(new_h3) || !ENGINE_add(new_h2))
  		{
  		printf("Add failed!\n");
  		goto end;
  		}
  	display_engine_list();
  	if(!ENGINE_remove(new_h2))
  		{
  		printf("Remove failed!\n");
  		goto end;
  		}
  	display_engine_list();
  	if(!ENGINE_add(new_h4))
  		{
  		printf("Add failed!\n");
  		goto end;
  		}
  	display_engine_list();
  	if(ENGINE_add(new_h3))
  		{
  		printf("Add *should* have failed but didn't!\n");
  		goto end;
  		}
  	else
  		printf("Add that should fail did.\n");
  	ERR_clear_error();
  	if(ENGINE_remove(new_h2))
  		{
  		printf("Remove *should* have failed but didn't!\n");
  		goto end;
  		}
  	else
  		printf("Remove that should fail did.\n");
  	ERR_clear_error();
  	if(!ENGINE_remove(new_h3))
  		{
  		printf("Remove failed!\n");
  		goto end;
  		}
  	display_engine_list();
  	if(!ENGINE_remove(new_h4))
  		{
  		printf("Remove failed!\n");
  		goto end;
  		}
  	display_engine_list();
  	/* Depending on whether there's any hardware support compiled
  	 * in, this remove may be destined to fail. */
  	ptr = ENGINE_get_first();
  	if(ptr)
  		if(!ENGINE_remove(ptr))
  			printf("Remove failed!i - probably no hardware "
  				"support present.\n");
  	if (ptr)
  		ENGINE_free(ptr);
  	display_engine_list();
  	if(!ENGINE_add(new_h1) || !ENGINE_remove(new_h1))
  		{
  		printf("Couldn't add and remove to an empty list!\n");
  		goto end;
  		}
  	else
  		printf("Successfully added and removed to an empty list!\n");
  	printf("About to beef up the engine-type list\n");
  	for(loop = 0; loop < 512; loop++)
  		{
  		sprintf(buf, "id%i", loop);
  		id = BUF_strdup(buf);
  		sprintf(buf, "Fake engine type %i", loop);
  		name = BUF_strdup(buf);
  		if(((block[loop] = ENGINE_new()) == NULL) ||
  				!ENGINE_set_id(block[loop], id) ||
  				!ENGINE_set_name(block[loop], name))
  			{
  			printf("Couldn't create block of ENGINE structures.\n"
  				"I'll probably also core-dump now, damn.\n");
  			goto end;
  			}
  		}
  	for(loop = 0; loop < 512; loop++)
  		{
  		if(!ENGINE_add(block[loop]))
  			{
  			printf("\nAdding stopped at %i, (%s,%s)\n",
  				loop, ENGINE_get_id(block[loop]),
  				ENGINE_get_name(block[loop]));
  			goto cleanup_loop;
  			}
  		else
  			printf("."); fflush(stdout);
  		}
  cleanup_loop:
  	printf("\nAbout to empty the engine-type list\n");
  	while((ptr = ENGINE_get_first()) != NULL)
  		{
  		if(!ENGINE_remove(ptr))
  			{
  			printf("\nRemove failed!\n");
  			goto end;
  			}
  		ENGINE_free(ptr);
  		printf("."); fflush(stdout);
  		}
  	for(loop = 0; loop < 512; loop++)
  		{
  		OPENSSL_free((void *)ENGINE_get_id(block[loop]));
  		OPENSSL_free((void *)ENGINE_get_name(block[loop]));
  		}
  	printf("\nTests completed happily\n");
  	to_return = 0;
  end:
  	if(to_return)
  		ERR_print_errors_fp(stderr);
  	if(new_h1) ENGINE_free(new_h1);
  	if(new_h2) ENGINE_free(new_h2);
  	if(new_h3) ENGINE_free(new_h3);
  	if(new_h4) ENGINE_free(new_h4);
  	for(loop = 0; loop < 512; loop++)
  		if(block[loop])
  			ENGINE_free(block[loop]);
  	ENGINE_cleanup();
  	CRYPTO_cleanup_all_ex_data();
  	ERR_free_strings();
  	ERR_remove_thread_state(NULL);
  	CRYPTO_mem_leaks_fp(stderr);
  	return to_return;
  	}
  #endif
  