Delete bundled copy of OpenSSL and replace with README.

openssl/crypto/engine/eng_dyn.c

Index: openssl/crypto/engine/eng_dyn.c
diff --git a/openssl/crypto/engine/eng_dyn.c b/openssl/crypto/engine/eng_dyn.c
deleted file mode 100644
index 8fb8634e3ede2bdc3305722cea4274e1e07b8149..0000000000000000000000000000000000000000
--- a/openssl/crypto/engine/eng_dyn.c
+++ /dev/null
@@ -1,551 +0,0 @@
-/* crypto/engine/eng_dyn.c */
-/* Written by Geoff Thorpe (geoff@geoffthorpe.net) for the OpenSSL
- * project 2001.
- */
-/* ====================================================================
- * 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 "eng_int.h"
-#include <openssl/dso.h>
-
-/* Shared libraries implementing ENGINEs for use by the "dynamic" ENGINE loader
- * should implement the hook-up functions with the following prototypes. */
-
-/* Our ENGINE handlers */
-static int dynamic_init(ENGINE *e);
-static int dynamic_finish(ENGINE *e);
-static int dynamic_ctrl(ENGINE *e, int cmd, long i, void *p, void (*f)(void));
-/* Predeclare our context type */
-typedef struct st_dynamic_data_ctx dynamic_data_ctx;
-/* The implementation for the important control command */
-static int dynamic_load(ENGINE *e, dynamic_data_ctx *ctx);
-
-#define DYNAMIC_CMD_SO_PATH		ENGINE_CMD_BASE
-#define DYNAMIC_CMD_NO_VCHECK		(ENGINE_CMD_BASE + 1)
-#define DYNAMIC_CMD_ID			(ENGINE_CMD_BASE + 2)
-#define DYNAMIC_CMD_LIST_ADD		(ENGINE_CMD_BASE + 3)
-#define DYNAMIC_CMD_DIR_LOAD		(ENGINE_CMD_BASE + 4)
-#define DYNAMIC_CMD_DIR_ADD		(ENGINE_CMD_BASE + 5)
-#define DYNAMIC_CMD_LOAD		(ENGINE_CMD_BASE + 6)
-
-/* The constants used when creating the ENGINE */
-static const char *engine_dynamic_id = "dynamic";
-static const char *engine_dynamic_name = "Dynamic engine loading support";
-static const ENGINE_CMD_DEFN dynamic_cmd_defns[] = {
-	{DYNAMIC_CMD_SO_PATH,
-		"SO_PATH",
-		"Specifies the path to the new ENGINE shared library",
-		ENGINE_CMD_FLAG_STRING},
-	{DYNAMIC_CMD_NO_VCHECK,
-		"NO_VCHECK",
-		"Specifies to continue even if version checking fails (boolean)",
-		ENGINE_CMD_FLAG_NUMERIC},
-	{DYNAMIC_CMD_ID,
-		"ID",
-		"Specifies an ENGINE id name for loading",
-		ENGINE_CMD_FLAG_STRING},
-	{DYNAMIC_CMD_LIST_ADD,
-		"LIST_ADD",
-		"Whether to add a loaded ENGINE to the internal list (0=no,1=yes,2=mandatory)",
-		ENGINE_CMD_FLAG_NUMERIC},
-	{DYNAMIC_CMD_DIR_LOAD,
-		"DIR_LOAD",
-		"Specifies whether to load from 'DIR_ADD' directories (0=no,1=yes,2=mandatory)",
-		ENGINE_CMD_FLAG_NUMERIC},
-	{DYNAMIC_CMD_DIR_ADD,
-		"DIR_ADD",
-		"Adds a directory from which ENGINEs can be loaded",
-		ENGINE_CMD_FLAG_STRING},
-	{DYNAMIC_CMD_LOAD,
-		"LOAD",
-		"Load up the ENGINE specified by other settings",
-		ENGINE_CMD_FLAG_NO_INPUT},
-	{0, NULL, NULL, 0}
-	};
-static const ENGINE_CMD_DEFN dynamic_cmd_defns_empty[] = {
-	{0, NULL, NULL, 0}
-	};
-
-/* Loading code stores state inside the ENGINE structure via the "ex_data"
- * element. We load all our state into a single structure and use that as a
- * single context in the "ex_data" stack. */
-struct st_dynamic_data_ctx
-	{
-	/* The DSO object we load that supplies the ENGINE code */
-	DSO *dynamic_dso;
-	/* The function pointer to the version checking shared library function */
-	dynamic_v_check_fn v_check;
-	/* The function pointer to the engine-binding shared library function */
-	dynamic_bind_engine bind_engine;
-	/* The default name/path for loading the shared library */
-	const char *DYNAMIC_LIBNAME;
-	/* Whether to continue loading on a version check failure */
-	int no_vcheck;
-	/* If non-NULL, stipulates the 'id' of the ENGINE to be loaded */
-	const char *engine_id;
-	/* If non-zero, a successfully loaded ENGINE should be added to the internal
-	 * ENGINE list. If 2, the add must succeed or the entire load should fail. */
-	int list_add_value;
-	/* The symbol name for the version checking function */
-	const char *DYNAMIC_F1;
-	/* The symbol name for the "initialise ENGINE structure" function */
-	const char *DYNAMIC_F2;
-	/* Whether to never use 'dirs', use 'dirs' as a fallback, or only use
-	 * 'dirs' for loading. Default is to use 'dirs' as a fallback. */
-	int dir_load;
-	/* A stack of directories from which ENGINEs could be loaded */
-	STACK_OF(OPENSSL_STRING) *dirs;
-	};
-
-/* This is the "ex_data" index we obtain and reserve for use with our context
- * structure. */
-static int dynamic_ex_data_idx = -1;
-
-static void int_free_str(char *s) { OPENSSL_free(s); }
-/* Because our ex_data element may or may not get allocated depending on whether
- * a "first-use" occurs before the ENGINE is freed, we have a memory leak
- * problem to solve. We can't declare a "new" handler for the ex_data as we
- * don't want a dynamic_data_ctx in *all* ENGINE structures of all types (this
- * is a bug in the design of CRYPTO_EX_DATA). As such, we just declare a "free"
- * handler and that will get called if an ENGINE is being destroyed and there
- * was an ex_data element corresponding to our context type. */
-static void dynamic_data_ctx_free_func(void *parent, void *ptr,
-			CRYPTO_EX_DATA *ad, int idx, long argl, void *argp)
-	{
-	if(ptr)
-		{
-		dynamic_data_ctx *ctx = (dynamic_data_ctx *)ptr;
-		if(ctx->dynamic_dso)
-			DSO_free(ctx->dynamic_dso);
-		if(ctx->DYNAMIC_LIBNAME)
-			OPENSSL_free((void*)ctx->DYNAMIC_LIBNAME);
-		if(ctx->engine_id)
-			OPENSSL_free((void*)ctx->engine_id);
-		if(ctx->dirs)
-			sk_OPENSSL_STRING_pop_free(ctx->dirs, int_free_str);
-		OPENSSL_free(ctx);
-		}
-	}
-
-/* Construct the per-ENGINE context. We create it blindly and then use a lock to
- * check for a race - if so, all but one of the threads "racing" will have
- * wasted their time. The alternative involves creating everything inside the
- * lock which is far worse. */
-static int dynamic_set_data_ctx(ENGINE *e, dynamic_data_ctx **ctx)
-	{
-	dynamic_data_ctx *c;
-	c = OPENSSL_malloc(sizeof(dynamic_data_ctx));
-	if(!c)
-		{
-		ENGINEerr(ENGINE_F_DYNAMIC_SET_DATA_CTX,ERR_R_MALLOC_FAILURE);
-		return 0;
-		}
-	memset(c, 0, sizeof(dynamic_data_ctx));
-	c->dynamic_dso = NULL;
-	c->v_check = NULL;
-	c->bind_engine = NULL;
-	c->DYNAMIC_LIBNAME = NULL;
-	c->no_vcheck = 0;
-	c->engine_id = NULL;
-	c->list_add_value = 0;
-	c->DYNAMIC_F1 = "v_check";
-	c->DYNAMIC_F2 = "bind_engine";
-	c->dir_load = 1;
-	c->dirs = sk_OPENSSL_STRING_new_null();
-	if(!c->dirs)
-		{
-		ENGINEerr(ENGINE_F_DYNAMIC_SET_DATA_CTX,ERR_R_MALLOC_FAILURE);
-		OPENSSL_free(c);
-		return 0;
-		}
-	CRYPTO_w_lock(CRYPTO_LOCK_ENGINE);
-	if((*ctx = (dynamic_data_ctx *)ENGINE_get_ex_data(e,
-				dynamic_ex_data_idx)) == NULL)
-		{
-		/* Good, we're the first */
-		ENGINE_set_ex_data(e, dynamic_ex_data_idx, c);
-		*ctx = c;
-		c = NULL;
-		}
-	CRYPTO_w_unlock(CRYPTO_LOCK_ENGINE);
-	/* If we lost the race to set the context, c is non-NULL and *ctx is the
-	 * context of the thread that won. */
-	if(c)
-		OPENSSL_free(c);
-	return 1;
-	}
-
-/* This function retrieves the context structure from an ENGINE's "ex_data", or
- * if it doesn't exist yet, sets it up. */
-static dynamic_data_ctx *dynamic_get_data_ctx(ENGINE *e)
-	{
-	dynamic_data_ctx *ctx;
-	if(dynamic_ex_data_idx < 0)
-		{
-		/* Create and register the ENGINE ex_data, and associate our
-		 * "free" function with it to ensure any allocated contexts get
-		 * freed when an ENGINE goes underground. */
-		int new_idx = ENGINE_get_ex_new_index(0, NULL, NULL, NULL,
-					dynamic_data_ctx_free_func);
-		if(new_idx == -1)
-			{
-			ENGINEerr(ENGINE_F_DYNAMIC_GET_DATA_CTX,ENGINE_R_NO_INDEX);
-			return NULL;
-			}
-		CRYPTO_w_lock(CRYPTO_LOCK_ENGINE);
-		/* Avoid a race by checking again inside this lock */
-		if(dynamic_ex_data_idx < 0)
-			{
-			/* Good, someone didn't beat us to it */
-			dynamic_ex_data_idx = new_idx;
-			new_idx = -1;
-			}
-		CRYPTO_w_unlock(CRYPTO_LOCK_ENGINE);
-		/* In theory we could "give back" the index here if
-		 * (new_idx>-1), but it's not possible and wouldn't gain us much
-		 * if it were. */
-		}
-	ctx = (dynamic_data_ctx *)ENGINE_get_ex_data(e, dynamic_ex_data_idx);
-	/* Check if the context needs to be created */
-	if((ctx == NULL) && !dynamic_set_data_ctx(e, &ctx))
-		/* "set_data" will set errors if necessary */
-		return NULL;
-	return ctx;
-	}
-
-static ENGINE *engine_dynamic(void)
-	{
-	ENGINE *ret = ENGINE_new();
-	if(!ret)
-		return NULL;
-	if(!ENGINE_set_id(ret, engine_dynamic_id) ||
-			!ENGINE_set_name(ret, engine_dynamic_name) ||
-			!ENGINE_set_init_function(ret, dynamic_init) ||
-			!ENGINE_set_finish_function(ret, dynamic_finish) ||
-			!ENGINE_set_ctrl_function(ret, dynamic_ctrl) ||
-			!ENGINE_set_flags(ret, ENGINE_FLAGS_BY_ID_COPY) ||
-			!ENGINE_set_cmd_defns(ret, dynamic_cmd_defns))
-		{
-		ENGINE_free(ret);
-		return NULL;
-		}
-	return ret;
-	}
-
-void ENGINE_load_dynamic(void)
-	{
-	ENGINE *toadd = engine_dynamic();
-	if(!toadd) return;
-	ENGINE_add(toadd);
-	/* If the "add" worked, it gets a structural reference. So either way,
-	 * we release our just-created reference. */
-	ENGINE_free(toadd);
-	/* If the "add" didn't work, it was probably a conflict because it was
-	 * already added (eg. someone calling ENGINE_load_blah then calling
-	 * ENGINE_load_builtin_engines() perhaps). */
-	ERR_clear_error();
-	}
-
-static int dynamic_init(ENGINE *e)
-	{
-	/* We always return failure - the "dyanamic" engine itself can't be used
-	 * for anything. */
-	return 0;
-	}
-
-static int dynamic_finish(ENGINE *e)
-	{
-	/* This should never be called on account of "dynamic_init" always
-	 * failing. */
-	return 0;
-	}
-
-static int dynamic_ctrl(ENGINE *e, int cmd, long i, void *p, void (*f)(void))
-	{
-	dynamic_data_ctx *ctx = dynamic_get_data_ctx(e);
-	int initialised;
-	
-	if(!ctx)
-		{
-		ENGINEerr(ENGINE_F_DYNAMIC_CTRL,ENGINE_R_NOT_LOADED);
-		return 0;
-		}
-	initialised = ((ctx->dynamic_dso == NULL) ? 0 : 1);
-	/* All our control commands require the ENGINE to be uninitialised */
-	if(initialised)
-		{
-		ENGINEerr(ENGINE_F_DYNAMIC_CTRL,
-			ENGINE_R_ALREADY_LOADED);
-		return 0;
-		}
-	switch(cmd)
-		{
-	case DYNAMIC_CMD_SO_PATH:
-		/* a NULL 'p' or a string of zero-length is the same thing */
-		if(p && (strlen((const char *)p) < 1))
-			p = NULL;
-		if(ctx->DYNAMIC_LIBNAME)
-			OPENSSL_free((void*)ctx->DYNAMIC_LIBNAME);
-		if(p)
-			ctx->DYNAMIC_LIBNAME = BUF_strdup(p);
-		else
-			ctx->DYNAMIC_LIBNAME = NULL;
-		return (ctx->DYNAMIC_LIBNAME ? 1 : 0);
-	case DYNAMIC_CMD_NO_VCHECK:
-		ctx->no_vcheck = ((i == 0) ? 0 : 1);
-		return 1;
-	case DYNAMIC_CMD_ID:
-		/* a NULL 'p' or a string of zero-length is the same thing */
-		if(p && (strlen((const char *)p) < 1))
-			p = NULL;
-		if(ctx->engine_id)
-			OPENSSL_free((void*)ctx->engine_id);
-		if(p)
-			ctx->engine_id = BUF_strdup(p);
-		else
-			ctx->engine_id = NULL;
-		return (ctx->engine_id ? 1 : 0);
-	case DYNAMIC_CMD_LIST_ADD:
-		if((i < 0) || (i > 2))
-			{
-			ENGINEerr(ENGINE_F_DYNAMIC_CTRL,
-				ENGINE_R_INVALID_ARGUMENT);
-			return 0;
-			}
-		ctx->list_add_value = (int)i;
-		return 1;
-	case DYNAMIC_CMD_LOAD:
-		return dynamic_load(e, ctx);
-	case DYNAMIC_CMD_DIR_LOAD:
-		if((i < 0) || (i > 2))
-			{
-			ENGINEerr(ENGINE_F_DYNAMIC_CTRL,
-				ENGINE_R_INVALID_ARGUMENT);
-			return 0;
-			}
-		ctx->dir_load = (int)i;
-		return 1;
-	case DYNAMIC_CMD_DIR_ADD:
-		/* a NULL 'p' or a string of zero-length is the same thing */
-		if(!p || (strlen((const char *)p) < 1))
-			{
-			ENGINEerr(ENGINE_F_DYNAMIC_CTRL,
-				ENGINE_R_INVALID_ARGUMENT);
-			return 0;
-			}
-		{
-		char *tmp_str = BUF_strdup(p);
-		if(!tmp_str)
-			{
-			ENGINEerr(ENGINE_F_DYNAMIC_CTRL,
-				ERR_R_MALLOC_FAILURE);
-			return 0;
-			}
-		sk_OPENSSL_STRING_insert(ctx->dirs, tmp_str, -1);
-		}
-		return 1;
-	default:
-		break;
-		}
-	ENGINEerr(ENGINE_F_DYNAMIC_CTRL,ENGINE_R_CTRL_COMMAND_NOT_IMPLEMENTED);
-	return 0;
-	}
-
-static int int_load(dynamic_data_ctx *ctx)
-	{
-	int num, loop;
-	/* Unless told not to, try a direct load */
-	if((ctx->dir_load != 2) && (DSO_load(ctx->dynamic_dso,
-				ctx->DYNAMIC_LIBNAME, NULL, 0) != NULL))
-		return 1;
-	/* If we're not allowed to use 'dirs' or we have none, fail */
-	if(!ctx->dir_load || (num = sk_OPENSSL_STRING_num(ctx->dirs)) < 1)
-		return 0;
-	for(loop = 0; loop < num; loop++)
-		{
-		const char *s = sk_OPENSSL_STRING_value(ctx->dirs, loop);
-		char *merge = DSO_merge(ctx->dynamic_dso, ctx->DYNAMIC_LIBNAME, s);
-		if(!merge)
-			return 0;
-		if(DSO_load(ctx->dynamic_dso, merge, NULL, 0))
-			{
-			/* Found what we're looking for */
-			OPENSSL_free(merge);
-			/* Previous failed loop iterations, if any, will have resulted in
-			 * errors. Clear them out before returning success. */
-			ERR_clear_error();
-			return 1;
-			}
-		OPENSSL_free(merge);
-		}
-	return 0;
-	}
-
-static int dynamic_load(ENGINE *e, dynamic_data_ctx *ctx)
-	{
-	ENGINE cpy;
-	dynamic_fns fns;
-
-	if(!ctx->dynamic_dso)
-		ctx->dynamic_dso = DSO_new();
-	if(!ctx->DYNAMIC_LIBNAME)
-		{
-		if(!ctx->engine_id)
-			return 0;
-		ctx->DYNAMIC_LIBNAME =
-			DSO_convert_filename(ctx->dynamic_dso, ctx->engine_id);
-		}
-	if(!int_load(ctx))
-		{
-		ENGINEerr(ENGINE_F_DYNAMIC_LOAD,
-			ENGINE_R_DSO_NOT_FOUND);
-		DSO_free(ctx->dynamic_dso);
-		ctx->dynamic_dso = NULL;
-		return 0;
-		}
-	/* We have to find a bind function otherwise it'll always end badly */
-	if(!(ctx->bind_engine = (dynamic_bind_engine)DSO_bind_func(
-					ctx->dynamic_dso, ctx->DYNAMIC_F2)))
-		{
-		ctx->bind_engine = NULL;
-		DSO_free(ctx->dynamic_dso);
-		ctx->dynamic_dso = NULL;
-		ENGINEerr(ENGINE_F_DYNAMIC_LOAD,
-			ENGINE_R_DSO_FAILURE);
-		return 0;
-		}
-	/* Do we perform version checking? */
-	if(!ctx->no_vcheck)
-		{
-		unsigned long vcheck_res = 0;
-		/* Now we try to find a version checking function and decide how
-		 * to cope with failure if/when it fails. */
-		ctx->v_check = (dynamic_v_check_fn)DSO_bind_func(
-				ctx->dynamic_dso, ctx->DYNAMIC_F1);
-		if(ctx->v_check)
-			vcheck_res = ctx->v_check(OSSL_DYNAMIC_VERSION);
-		/* We fail if the version checker veto'd the load *or* if it is
-		 * deferring to us (by returning its version) and we think it is
-		 * too old. */
-		if(vcheck_res < OSSL_DYNAMIC_OLDEST)
-			{
-			/* Fail */
-			ctx->bind_engine = NULL;
-			ctx->v_check = NULL;
-			DSO_free(ctx->dynamic_dso);
-			ctx->dynamic_dso = NULL;
-			ENGINEerr(ENGINE_F_DYNAMIC_LOAD,
-				ENGINE_R_VERSION_INCOMPATIBILITY);
-			return 0;
-			}
-		}
-	/* First binary copy the ENGINE structure so that we can roll back if
-	 * the hand-over fails */
-	memcpy(&cpy, e, sizeof(ENGINE));
-	/* Provide the ERR, "ex_data", memory, and locking callbacks so the
-	 * loaded library uses our state rather than its own. FIXME: As noted in
-	 * engine.h, much of this would be simplified if each area of code
-	 * provided its own "summary" structure of all related callbacks. It
-	 * would also increase opaqueness. */
-	fns.static_state = ENGINE_get_static_state();
-	fns.err_fns = ERR_get_implementation();
-	fns.ex_data_fns = CRYPTO_get_ex_data_implementation();
-	CRYPTO_get_mem_functions(&fns.mem_fns.malloc_cb,
-				&fns.mem_fns.realloc_cb,
-				&fns.mem_fns.free_cb);
-	fns.lock_fns.lock_locking_cb = CRYPTO_get_locking_callback();
-	fns.lock_fns.lock_add_lock_cb = CRYPTO_get_add_lock_callback();
-	fns.lock_fns.dynlock_create_cb = CRYPTO_get_dynlock_create_callback();
-	fns.lock_fns.dynlock_lock_cb = CRYPTO_get_dynlock_lock_callback();
-	fns.lock_fns.dynlock_destroy_cb = CRYPTO_get_dynlock_destroy_callback();
-	/* Now that we've loaded the dynamic engine, make sure no "dynamic"
-	 * ENGINE elements will show through. */
-	engine_set_all_null(e);
-
-	/* Try to bind the ENGINE onto our own ENGINE structure */
-	if(!ctx->bind_engine(e, ctx->engine_id, &fns))
-		{
-		ctx->bind_engine = NULL;
-		ctx->v_check = NULL;
-		DSO_free(ctx->dynamic_dso);
-		ctx->dynamic_dso = NULL;
-		ENGINEerr(ENGINE_F_DYNAMIC_LOAD,ENGINE_R_INIT_FAILED);
-		/* Copy the original ENGINE structure back */
-		memcpy(e, &cpy, sizeof(ENGINE));
-		return 0;
-		}
-	/* Do we try to add this ENGINE to the internal list too? */
-	if(ctx->list_add_value > 0)
-		{
-		if(!ENGINE_add(e))
-			{
-			/* Do we tolerate this or fail? */
-			if(ctx->list_add_value > 1)
-				{
-				/* Fail - NB: By this time, it's too late to
-				 * rollback, and trying to do so allows the
-				 * bind_engine() code to have created leaks. We
-				 * just have to fail where we are, after the
-				 * ENGINE has changed. */
-				ENGINEerr(ENGINE_F_DYNAMIC_LOAD,
-					ENGINE_R_CONFLICTING_ENGINE_ID);
-				return 0;
-				}
-			/* Tolerate */
-			ERR_clear_error();
-			}
-		}
-	return 1;
-	}