1/* crypto/engine/eng_dyn.c */
2/* Written by Geoff Thorpe (geoff@geoffthorpe.net) for the OpenSSL
3 * project 2001.
4 */
5/* ====================================================================
6 * Copyright (c) 1999-2001 The OpenSSL Project.  All rights reserved.
7 *
8 * Redistribution and use in source and binary forms, with or without
9 * modification, are permitted provided that the following conditions
10 * are met:
11 *
12 * 1. Redistributions of source code must retain the above copyright
13 *    notice, this list of conditions and the following disclaimer.
14 *
15 * 2. Redistributions in binary form must reproduce the above copyright
16 *    notice, this list of conditions and the following disclaimer in
17 *    the documentation and/or other materials provided with the
18 *    distribution.
19 *
20 * 3. All advertising materials mentioning features or use of this
21 *    software must display the following acknowledgment:
22 *    "This product includes software developed by the OpenSSL Project
23 *    for use in the OpenSSL Toolkit. (http://www.OpenSSL.org/)"
24 *
25 * 4. The names "OpenSSL Toolkit" and "OpenSSL Project" must not be used to
26 *    endorse or promote products derived from this software without
27 *    prior written permission. For written permission, please contact
28 *    licensing@OpenSSL.org.
29 *
30 * 5. Products derived from this software may not be called "OpenSSL"
31 *    nor may "OpenSSL" appear in their names without prior written
32 *    permission of the OpenSSL Project.
33 *
34 * 6. Redistributions of any form whatsoever must retain the following
35 *    acknowledgment:
36 *    "This product includes software developed by the OpenSSL Project
37 *    for use in the OpenSSL Toolkit (http://www.OpenSSL.org/)"
38 *
39 * THIS SOFTWARE IS PROVIDED BY THE OpenSSL PROJECT ``AS IS'' AND ANY
40 * EXPRESSED OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
41 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
42 * PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL THE OpenSSL PROJECT OR
43 * ITS CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
44 * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
45 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
46 * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
47 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
48 * STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
49 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED
50 * OF THE POSSIBILITY OF SUCH DAMAGE.
51 * ====================================================================
52 *
53 * This product includes cryptographic software written by Eric Young
54 * (eay@cryptsoft.com).  This product includes software written by Tim
55 * Hudson (tjh@cryptsoft.com).
56 *
57 */
58
59
60#include "eng_int.h"
61#include <openssl/dso.h>
62
63/* Shared libraries implementing ENGINEs for use by the "dynamic" ENGINE loader
64 * should implement the hook-up functions with the following prototypes. */
65
66/* Our ENGINE handlers */
67static int dynamic_init(ENGINE *e);
68static int dynamic_finish(ENGINE *e);
69static int dynamic_ctrl(ENGINE *e, int cmd, long i, void *p, void (*f)(void));
70/* Predeclare our context type */
71typedef struct st_dynamic_data_ctx dynamic_data_ctx;
72/* The implementation for the important control command */
73static int dynamic_load(ENGINE *e, dynamic_data_ctx *ctx);
74
75#define DYNAMIC_CMD_SO_PATH		ENGINE_CMD_BASE
76#define DYNAMIC_CMD_NO_VCHECK		(ENGINE_CMD_BASE + 1)
77#define DYNAMIC_CMD_ID			(ENGINE_CMD_BASE + 2)
78#define DYNAMIC_CMD_LIST_ADD		(ENGINE_CMD_BASE + 3)
79#define DYNAMIC_CMD_DIR_LOAD		(ENGINE_CMD_BASE + 4)
80#define DYNAMIC_CMD_DIR_ADD		(ENGINE_CMD_BASE + 5)
81#define DYNAMIC_CMD_LOAD		(ENGINE_CMD_BASE + 6)
82
83/* The constants used when creating the ENGINE */
84static const char *engine_dynamic_id = "dynamic";
85static const char *engine_dynamic_name = "Dynamic engine loading support";
86static const ENGINE_CMD_DEFN dynamic_cmd_defns[] = {
87	{DYNAMIC_CMD_SO_PATH,
88		"SO_PATH",
89		"Specifies the path to the new ENGINE shared library",
90		ENGINE_CMD_FLAG_STRING},
91	{DYNAMIC_CMD_NO_VCHECK,
92		"NO_VCHECK",
93		"Specifies to continue even if version checking fails (boolean)",
94		ENGINE_CMD_FLAG_NUMERIC},
95	{DYNAMIC_CMD_ID,
96		"ID",
97		"Specifies an ENGINE id name for loading",
98		ENGINE_CMD_FLAG_STRING},
99	{DYNAMIC_CMD_LIST_ADD,
100		"LIST_ADD",
101		"Whether to add a loaded ENGINE to the internal list (0=no,1=yes,2=mandatory)",
102		ENGINE_CMD_FLAG_NUMERIC},
103	{DYNAMIC_CMD_DIR_LOAD,
104		"DIR_LOAD",
105		"Specifies whether to load from 'DIR_ADD' directories (0=no,1=yes,2=mandatory)",
106		ENGINE_CMD_FLAG_NUMERIC},
107	{DYNAMIC_CMD_DIR_ADD,
108		"DIR_ADD",
109		"Adds a directory from which ENGINEs can be loaded",
110		ENGINE_CMD_FLAG_STRING},
111	{DYNAMIC_CMD_LOAD,
112		"LOAD",
113		"Load up the ENGINE specified by other settings",
114		ENGINE_CMD_FLAG_NO_INPUT},
115	{0, NULL, NULL, 0}
116	};
117static const ENGINE_CMD_DEFN dynamic_cmd_defns_empty[] = {
118	{0, NULL, NULL, 0}
119	};
120
121/* Loading code stores state inside the ENGINE structure via the "ex_data"
122 * element. We load all our state into a single structure and use that as a
123 * single context in the "ex_data" stack. */
124struct st_dynamic_data_ctx
125	{
126	/* The DSO object we load that supplies the ENGINE code */
127	DSO *dynamic_dso;
128	/* The function pointer to the version checking shared library function */
129	dynamic_v_check_fn v_check;
130	/* The function pointer to the engine-binding shared library function */
131	dynamic_bind_engine bind_engine;
132	/* The default name/path for loading the shared library */
133	const char *DYNAMIC_LIBNAME;
134	/* Whether to continue loading on a version check failure */
135	int no_vcheck;
136	/* If non-NULL, stipulates the 'id' of the ENGINE to be loaded */
137	const char *engine_id;
138	/* If non-zero, a successfully loaded ENGINE should be added to the internal
139	 * ENGINE list. If 2, the add must succeed or the entire load should fail. */
140	int list_add_value;
141	/* The symbol name for the version checking function */
142	const char *DYNAMIC_F1;
143	/* The symbol name for the "initialise ENGINE structure" function */
144	const char *DYNAMIC_F2;
145	/* Whether to never use 'dirs', use 'dirs' as a fallback, or only use
146	 * 'dirs' for loading. Default is to use 'dirs' as a fallback. */
147	int dir_load;
148	/* A stack of directories from which ENGINEs could be loaded */
149	STACK_OF(OPENSSL_STRING) *dirs;
150	};
151
152/* This is the "ex_data" index we obtain and reserve for use with our context
153 * structure. */
154static int dynamic_ex_data_idx = -1;
155
156static void int_free_str(char *s) { OPENSSL_free(s); }
157/* Because our ex_data element may or may not get allocated depending on whether
158 * a "first-use" occurs before the ENGINE is freed, we have a memory leak
159 * problem to solve. We can't declare a "new" handler for the ex_data as we
160 * don't want a dynamic_data_ctx in *all* ENGINE structures of all types (this
161 * is a bug in the design of CRYPTO_EX_DATA). As such, we just declare a "free"
162 * handler and that will get called if an ENGINE is being destroyed and there
163 * was an ex_data element corresponding to our context type. */
164static void dynamic_data_ctx_free_func(void *parent, void *ptr,
165			CRYPTO_EX_DATA *ad, int idx, long argl, void *argp)
166	{
167	if(ptr)
168		{
169		dynamic_data_ctx *ctx = (dynamic_data_ctx *)ptr;
170		if(ctx->dynamic_dso)
171			DSO_free(ctx->dynamic_dso);
172		if(ctx->DYNAMIC_LIBNAME)
173			OPENSSL_free((void*)ctx->DYNAMIC_LIBNAME);
174		if(ctx->engine_id)
175			OPENSSL_free((void*)ctx->engine_id);
176		if(ctx->dirs)
177			sk_OPENSSL_STRING_pop_free(ctx->dirs, int_free_str);
178		OPENSSL_free(ctx);
179		}
180	}
181
182/* Construct the per-ENGINE context. We create it blindly and then use a lock to
183 * check for a race - if so, all but one of the threads "racing" will have
184 * wasted their time. The alternative involves creating everything inside the
185 * lock which is far worse. */
186static int dynamic_set_data_ctx(ENGINE *e, dynamic_data_ctx **ctx)
187	{
188	dynamic_data_ctx *c;
189	c = OPENSSL_malloc(sizeof(dynamic_data_ctx));
190	if(!c)
191		{
192		ENGINEerr(ENGINE_F_DYNAMIC_SET_DATA_CTX,ERR_R_MALLOC_FAILURE);
193		return 0;
194		}
195	memset(c, 0, sizeof(dynamic_data_ctx));
196	c->dynamic_dso = NULL;
197	c->v_check = NULL;
198	c->bind_engine = NULL;
199	c->DYNAMIC_LIBNAME = NULL;
200	c->no_vcheck = 0;
201	c->engine_id = NULL;
202	c->list_add_value = 0;
203	c->DYNAMIC_F1 = "v_check";
204	c->DYNAMIC_F2 = "bind_engine";
205	c->dir_load = 1;
206	c->dirs = sk_OPENSSL_STRING_new_null();
207	if(!c->dirs)
208		{
209		ENGINEerr(ENGINE_F_DYNAMIC_SET_DATA_CTX,ERR_R_MALLOC_FAILURE);
210		OPENSSL_free(c);
211		return 0;
212		}
213	CRYPTO_w_lock(CRYPTO_LOCK_ENGINE);
214	if((*ctx = (dynamic_data_ctx *)ENGINE_get_ex_data(e,
215				dynamic_ex_data_idx)) == NULL)
216		{
217		/* Good, we're the first */
218		ENGINE_set_ex_data(e, dynamic_ex_data_idx, c);
219		*ctx = c;
220		c = NULL;
221		}
222	CRYPTO_w_unlock(CRYPTO_LOCK_ENGINE);
223	/* If we lost the race to set the context, c is non-NULL and *ctx is the
224	 * context of the thread that won. */
225	if(c)
226		OPENSSL_free(c);
227	return 1;
228	}
229
230/* This function retrieves the context structure from an ENGINE's "ex_data", or
231 * if it doesn't exist yet, sets it up. */
232static dynamic_data_ctx *dynamic_get_data_ctx(ENGINE *e)
233	{
234	dynamic_data_ctx *ctx;
235	if(dynamic_ex_data_idx < 0)
236		{
237		/* Create and register the ENGINE ex_data, and associate our
238		 * "free" function with it to ensure any allocated contexts get
239		 * freed when an ENGINE goes underground. */
240		int new_idx = ENGINE_get_ex_new_index(0, NULL, NULL, NULL,
241					dynamic_data_ctx_free_func);
242		if(new_idx == -1)
243			{
244			ENGINEerr(ENGINE_F_DYNAMIC_GET_DATA_CTX,ENGINE_R_NO_INDEX);
245			return NULL;
246			}
247		CRYPTO_w_lock(CRYPTO_LOCK_ENGINE);
248		/* Avoid a race by checking again inside this lock */
249		if(dynamic_ex_data_idx < 0)
250			{
251			/* Good, someone didn't beat us to it */
252			dynamic_ex_data_idx = new_idx;
253			new_idx = -1;
254			}
255		CRYPTO_w_unlock(CRYPTO_LOCK_ENGINE);
256		/* In theory we could "give back" the index here if
257		 * (new_idx>-1), but it's not possible and wouldn't gain us much
258		 * if it were. */
259		}
260	ctx = (dynamic_data_ctx *)ENGINE_get_ex_data(e, dynamic_ex_data_idx);
261	/* Check if the context needs to be created */
262	if((ctx == NULL) && !dynamic_set_data_ctx(e, &ctx))
263		/* "set_data" will set errors if necessary */
264		return NULL;
265	return ctx;
266	}
267
268static ENGINE *engine_dynamic(void)
269	{
270	ENGINE *ret = ENGINE_new();
271	if(!ret)
272		return NULL;
273	if(!ENGINE_set_id(ret, engine_dynamic_id) ||
274			!ENGINE_set_name(ret, engine_dynamic_name) ||
275			!ENGINE_set_init_function(ret, dynamic_init) ||
276			!ENGINE_set_finish_function(ret, dynamic_finish) ||
277			!ENGINE_set_ctrl_function(ret, dynamic_ctrl) ||
278			!ENGINE_set_flags(ret, ENGINE_FLAGS_BY_ID_COPY) ||
279			!ENGINE_set_cmd_defns(ret, dynamic_cmd_defns))
280		{
281		ENGINE_free(ret);
282		return NULL;
283		}
284	return ret;
285	}
286
287void ENGINE_load_dynamic(void)
288	{
289	ENGINE *toadd = engine_dynamic();
290	if(!toadd) return;
291	ENGINE_add(toadd);
292	/* If the "add" worked, it gets a structural reference. So either way,
293	 * we release our just-created reference. */
294	ENGINE_free(toadd);
295	/* If the "add" didn't work, it was probably a conflict because it was
296	 * already added (eg. someone calling ENGINE_load_blah then calling
297	 * ENGINE_load_builtin_engines() perhaps). */
298	ERR_clear_error();
299	}
300
301static int dynamic_init(ENGINE *e)
302	{
303	/* We always return failure - the "dyanamic" engine itself can't be used
304	 * for anything. */
305	return 0;
306	}
307
308static int dynamic_finish(ENGINE *e)
309	{
310	/* This should never be called on account of "dynamic_init" always
311	 * failing. */
312	return 0;
313	}
314
315static int dynamic_ctrl(ENGINE *e, int cmd, long i, void *p, void (*f)(void))
316	{
317	dynamic_data_ctx *ctx = dynamic_get_data_ctx(e);
318	int initialised;
319
320	if(!ctx)
321		{
322		ENGINEerr(ENGINE_F_DYNAMIC_CTRL,ENGINE_R_NOT_LOADED);
323		return 0;
324		}
325	initialised = ((ctx->dynamic_dso == NULL) ? 0 : 1);
326	/* All our control commands require the ENGINE to be uninitialised */
327	if(initialised)
328		{
329		ENGINEerr(ENGINE_F_DYNAMIC_CTRL,
330			ENGINE_R_ALREADY_LOADED);
331		return 0;
332		}
333	switch(cmd)
334		{
335	case DYNAMIC_CMD_SO_PATH:
336		/* a NULL 'p' or a string of zero-length is the same thing */
337		if(p && (strlen((const char *)p) < 1))
338			p = NULL;
339		if(ctx->DYNAMIC_LIBNAME)
340			OPENSSL_free((void*)ctx->DYNAMIC_LIBNAME);
341		if(p)
342			ctx->DYNAMIC_LIBNAME = BUF_strdup(p);
343		else
344			ctx->DYNAMIC_LIBNAME = NULL;
345		return (ctx->DYNAMIC_LIBNAME ? 1 : 0);
346	case DYNAMIC_CMD_NO_VCHECK:
347		ctx->no_vcheck = ((i == 0) ? 0 : 1);
348		return 1;
349	case DYNAMIC_CMD_ID:
350		/* a NULL 'p' or a string of zero-length is the same thing */
351		if(p && (strlen((const char *)p) < 1))
352			p = NULL;
353		if(ctx->engine_id)
354			OPENSSL_free((void*)ctx->engine_id);
355		if(p)
356			ctx->engine_id = BUF_strdup(p);
357		else
358			ctx->engine_id = NULL;
359		return (ctx->engine_id ? 1 : 0);
360	case DYNAMIC_CMD_LIST_ADD:
361		if((i < 0) || (i > 2))
362			{
363			ENGINEerr(ENGINE_F_DYNAMIC_CTRL,
364				ENGINE_R_INVALID_ARGUMENT);
365			return 0;
366			}
367		ctx->list_add_value = (int)i;
368		return 1;
369	case DYNAMIC_CMD_LOAD:
370		return dynamic_load(e, ctx);
371	case DYNAMIC_CMD_DIR_LOAD:
372		if((i < 0) || (i > 2))
373			{
374			ENGINEerr(ENGINE_F_DYNAMIC_CTRL,
375				ENGINE_R_INVALID_ARGUMENT);
376			return 0;
377			}
378		ctx->dir_load = (int)i;
379		return 1;
380	case DYNAMIC_CMD_DIR_ADD:
381		/* a NULL 'p' or a string of zero-length is the same thing */
382		if(!p || (strlen((const char *)p) < 1))
383			{
384			ENGINEerr(ENGINE_F_DYNAMIC_CTRL,
385				ENGINE_R_INVALID_ARGUMENT);
386			return 0;
387			}
388		{
389		char *tmp_str = BUF_strdup(p);
390		if(!tmp_str)
391			{
392			ENGINEerr(ENGINE_F_DYNAMIC_CTRL,
393				ERR_R_MALLOC_FAILURE);
394			return 0;
395			}
396		sk_OPENSSL_STRING_insert(ctx->dirs, tmp_str, -1);
397		}
398		return 1;
399	default:
400		break;
401		}
402	ENGINEerr(ENGINE_F_DYNAMIC_CTRL,ENGINE_R_CTRL_COMMAND_NOT_IMPLEMENTED);
403	return 0;
404	}
405
406static int int_load(dynamic_data_ctx *ctx)
407	{
408	int num, loop;
409	/* Unless told not to, try a direct load */
410	if((ctx->dir_load != 2) && (DSO_load(ctx->dynamic_dso,
411				ctx->DYNAMIC_LIBNAME, NULL, 0)) != NULL)
412		return 1;
413	/* If we're not allowed to use 'dirs' or we have none, fail */
414	if(!ctx->dir_load || (num = sk_OPENSSL_STRING_num(ctx->dirs)) < 1)
415		return 0;
416	for(loop = 0; loop < num; loop++)
417		{
418		const char *s = sk_OPENSSL_STRING_value(ctx->dirs, loop);
419		char *merge = DSO_merge(ctx->dynamic_dso, ctx->DYNAMIC_LIBNAME, s);
420		if(!merge)
421			return 0;
422		if(DSO_load(ctx->dynamic_dso, merge, NULL, 0))
423			{
424			/* Found what we're looking for */
425			OPENSSL_free(merge);
426			return 1;
427			}
428		OPENSSL_free(merge);
429		}
430	return 0;
431	}
432
433static int dynamic_load(ENGINE *e, dynamic_data_ctx *ctx)
434	{
435	ENGINE cpy;
436	dynamic_fns fns;
437
438	if(!ctx->dynamic_dso)
439		ctx->dynamic_dso = DSO_new();
440	if(!ctx->DYNAMIC_LIBNAME)
441		{
442		if(!ctx->engine_id)
443			return 0;
444		ctx->DYNAMIC_LIBNAME =
445			DSO_convert_filename(ctx->dynamic_dso, ctx->engine_id);
446		}
447	if(!int_load(ctx))
448		{
449		ENGINEerr(ENGINE_F_DYNAMIC_LOAD,
450			ENGINE_R_DSO_NOT_FOUND);
451		DSO_free(ctx->dynamic_dso);
452		ctx->dynamic_dso = NULL;
453		return 0;
454		}
455	/* We have to find a bind function otherwise it'll always end badly */
456	if(!(ctx->bind_engine = (dynamic_bind_engine)DSO_bind_func(
457					ctx->dynamic_dso, ctx->DYNAMIC_F2)))
458		{
459		ctx->bind_engine = NULL;
460		DSO_free(ctx->dynamic_dso);
461		ctx->dynamic_dso = NULL;
462		ENGINEerr(ENGINE_F_DYNAMIC_LOAD,
463			ENGINE_R_DSO_FAILURE);
464		return 0;
465		}
466	/* Do we perform version checking? */
467	if(!ctx->no_vcheck)
468		{
469		unsigned long vcheck_res = 0;
470		/* Now we try to find a version checking function and decide how
471		 * to cope with failure if/when it fails. */
472		ctx->v_check = (dynamic_v_check_fn)DSO_bind_func(
473				ctx->dynamic_dso, ctx->DYNAMIC_F1);
474		if(ctx->v_check)
475			vcheck_res = ctx->v_check(OSSL_DYNAMIC_VERSION);
476		/* We fail if the version checker veto'd the load *or* if it is
477		 * deferring to us (by returning its version) and we think it is
478		 * too old. */
479		if(vcheck_res < OSSL_DYNAMIC_OLDEST)
480			{
481			/* Fail */
482			ctx->bind_engine = NULL;
483			ctx->v_check = NULL;
484			DSO_free(ctx->dynamic_dso);
485			ctx->dynamic_dso = NULL;
486			ENGINEerr(ENGINE_F_DYNAMIC_LOAD,
487				ENGINE_R_VERSION_INCOMPATIBILITY);
488			return 0;
489			}
490		}
491	/* First binary copy the ENGINE structure so that we can roll back if
492	 * the hand-over fails */
493	memcpy(&cpy, e, sizeof(ENGINE));
494	/* Provide the ERR, "ex_data", memory, and locking callbacks so the
495	 * loaded library uses our state rather than its own. FIXME: As noted in
496	 * engine.h, much of this would be simplified if each area of code
497	 * provided its own "summary" structure of all related callbacks. It
498	 * would also increase opaqueness. */
499	fns.static_state = ENGINE_get_static_state();
500	fns.err_fns = ERR_get_implementation();
501	fns.ex_data_fns = CRYPTO_get_ex_data_implementation();
502	CRYPTO_get_mem_functions(&fns.mem_fns.malloc_cb,
503				&fns.mem_fns.realloc_cb,
504				&fns.mem_fns.free_cb);
505	fns.lock_fns.lock_locking_cb = CRYPTO_get_locking_callback();
506	fns.lock_fns.lock_add_lock_cb = CRYPTO_get_add_lock_callback();
507	fns.lock_fns.dynlock_create_cb = CRYPTO_get_dynlock_create_callback();
508	fns.lock_fns.dynlock_lock_cb = CRYPTO_get_dynlock_lock_callback();
509	fns.lock_fns.dynlock_destroy_cb = CRYPTO_get_dynlock_destroy_callback();
510	/* Now that we've loaded the dynamic engine, make sure no "dynamic"
511	 * ENGINE elements will show through. */
512	engine_set_all_null(e);
513
514	/* Try to bind the ENGINE onto our own ENGINE structure */
515	if(!ctx->bind_engine(e, ctx->engine_id, &fns))
516		{
517		ctx->bind_engine = NULL;
518		ctx->v_check = NULL;
519		DSO_free(ctx->dynamic_dso);
520		ctx->dynamic_dso = NULL;
521		ENGINEerr(ENGINE_F_DYNAMIC_LOAD,ENGINE_R_INIT_FAILED);
522		/* Copy the original ENGINE structure back */
523		memcpy(e, &cpy, sizeof(ENGINE));
524		return 0;
525		}
526	/* Do we try to add this ENGINE to the internal list too? */
527	if(ctx->list_add_value > 0)
528		{
529		if(!ENGINE_add(e))
530			{
531			/* Do we tolerate this or fail? */
532			if(ctx->list_add_value > 1)
533				{
534				/* Fail - NB: By this time, it's too late to
535				 * rollback, and trying to do so allows the
536				 * bind_engine() code to have created leaks. We
537				 * just have to fail where we are, after the
538				 * ENGINE has changed. */
539				ENGINEerr(ENGINE_F_DYNAMIC_LOAD,
540					ENGINE_R_CONFLICTING_ENGINE_ID);
541				return 0;
542				}
543			/* Tolerate */
544			ERR_clear_error();
545			}
546		}
547	return 1;
548	}
549