Head

GCC Code Coverage Report

Directory:	./		Exec	Total	Coverage
File:	lib/libcrypto/engine/eng_list.c	Lines:	78	155	50.3 %
Date:	2017-11-13	Branches:	41	76	53.9 %


/* $OpenBSD: eng_list.c,v 1.22 2017/01/29 17:49:23 beck Exp $ */
/* 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).
 *
 */
/* ====================================================================
 * Copyright 2002 Sun Microsystems, Inc. ALL RIGHTS RESERVED.
 * ECDH support in OpenSSL originally developed by
 * SUN MICROSYSTEMS, INC., and contributed to the OpenSSL project.
 */

#include <string.h>
#include <unistd.h>

#include <openssl/opensslconf.h>

#include <openssl/err.h>

#include "cryptlib.h"
#include "eng_int.h"

/* The linked-list of pointers to engine types. engine_list_head
 * incorporates an implicit structural reference but engine_list_tail
 * does not - the latter is a computational niceity and only points
 * to something that is already pointed to by its predecessor in the
 * list (or engine_list_head itself). In the same way, the use of the
 * "prev" pointer in each ENGINE is to save excessive list iteration,
 * it doesn't correspond to an extra structural reference. Hence,
 * engine_list_head, and each non-null "next" pointer account for
 * the list itself assuming exactly 1 structural reference on each
 * list member. */
static ENGINE *engine_list_head = NULL;
static ENGINE *engine_list_tail = NULL;

/* This cleanup function is only needed internally. If it should be called, we
 * register it with the "ENGINE_cleanup()" stack to be called during cleanup. */

static void
engine_list_cleanup(void)
{
	ENGINE *iterator = engine_list_head;

	while (iterator != NULL && ENGINE_remove(iterator))
		iterator = engine_list_head;
}

/* These static functions starting with a lower case "engine_" always
 * take place when CRYPTO_LOCK_ENGINE has been locked up. */
static int
engine_list_add(ENGINE *e)
{
	int conflict = 0;
	ENGINE *iterator = NULL;

	if (e == NULL) {
		ENGINEerror(ERR_R_PASSED_NULL_PARAMETER);
		return 0;
	}
	iterator = engine_list_head;
	while (iterator && !conflict) {
		conflict = (strcmp(iterator->id, e->id) == 0);
		iterator = iterator->next;
	}
	if (conflict) {
		ENGINEerror(ENGINE_R_CONFLICTING_ENGINE_ID);
		return 0;
	}
	if (engine_list_head == NULL) {
		/* We are adding to an empty list. */
		if (engine_list_tail) {
			ENGINEerror(ENGINE_R_INTERNAL_LIST_ERROR);
			return 0;
		}
		engine_list_head = e;
		e->prev = NULL;
		/* The first time the list allocates, we should register the
		 * cleanup. */
		engine_cleanup_add_last(engine_list_cleanup);
	} else {
		/* We are adding to the tail of an existing list. */
		if ((engine_list_tail == NULL) ||
		    (engine_list_tail->next != NULL)) {
			ENGINEerror(ENGINE_R_INTERNAL_LIST_ERROR);
			return 0;
		}
		engine_list_tail->next = e;
		e->prev = engine_list_tail;
	}
	/* Having the engine in the list assumes a structural
	 * reference. */
	e->struct_ref++;
	engine_ref_debug(e, 0, 1)
	/* However it came to be, e is the last item in the list. */
	engine_list_tail = e;
	e->next = NULL;
	return 1;
}

static int
engine_list_remove(ENGINE *e)
{
	ENGINE *iterator;

	if (e == NULL) {
		ENGINEerror(ERR_R_PASSED_NULL_PARAMETER);
		return 0;
	}
	/* We need to check that e is in our linked list! */
	iterator = engine_list_head;
	while (iterator && (iterator != e))
		iterator = iterator->next;
	if (iterator == NULL) {
		ENGINEerror(ENGINE_R_ENGINE_IS_NOT_IN_LIST);
		return 0;
	}
	/* un-link e from the chain. */
	if (e->next)
		e->next->prev = e->prev;
	if (e->prev)
		e->prev->next = e->next;
	/* Correct our head/tail if necessary. */
	if (engine_list_head == e)
		engine_list_head = e->next;
	if (engine_list_tail == e)
		engine_list_tail = e->prev;
	engine_free_util(e, 0);
	return 1;
}

/* Get the first/last "ENGINE" type available. */
ENGINE *
ENGINE_get_first(void)
{
	ENGINE *ret;

	CRYPTO_w_lock(CRYPTO_LOCK_ENGINE);
	ret = engine_list_head;
	if (ret) {
		ret->struct_ref++;
		engine_ref_debug(ret, 0, 1)
	}
	CRYPTO_w_unlock(CRYPTO_LOCK_ENGINE);
	return ret;
}

ENGINE *
ENGINE_get_last(void)
{
	ENGINE *ret;

	CRYPTO_w_lock(CRYPTO_LOCK_ENGINE);
	ret = engine_list_tail;
	if (ret) {
		ret->struct_ref++;
		engine_ref_debug(ret, 0, 1)
	}
	CRYPTO_w_unlock(CRYPTO_LOCK_ENGINE);
	return ret;
}

/* Iterate to the next/previous "ENGINE" type (NULL = end of the list). */
ENGINE *
ENGINE_get_next(ENGINE *e)
{
	ENGINE *ret = NULL;

	if (e == NULL) {
		ENGINEerror(ERR_R_PASSED_NULL_PARAMETER);
		return 0;
	}
	CRYPTO_w_lock(CRYPTO_LOCK_ENGINE);
	ret = e->next;
	if (ret) {
		/* Return a valid structural refernce to the next ENGINE */
		ret->struct_ref++;
		engine_ref_debug(ret, 0, 1)
	}
	CRYPTO_w_unlock(CRYPTO_LOCK_ENGINE);
	/* Release the structural reference to the previous ENGINE */
	ENGINE_free(e);
	return ret;
}

ENGINE *
ENGINE_get_prev(ENGINE *e)
{
	ENGINE *ret = NULL;

	if (e == NULL) {
		ENGINEerror(ERR_R_PASSED_NULL_PARAMETER);
		return 0;
	}
	CRYPTO_w_lock(CRYPTO_LOCK_ENGINE);
	ret = e->prev;
	if (ret) {
		/* Return a valid structural reference to the next ENGINE */
		ret->struct_ref++;
		engine_ref_debug(ret, 0, 1)
	}
	CRYPTO_w_unlock(CRYPTO_LOCK_ENGINE);
	/* Release the structural reference to the previous ENGINE */
	ENGINE_free(e);
	return ret;
}

/* Add another "ENGINE" type into the list. */
int
ENGINE_add(ENGINE *e)
{
	int to_return = 1;

	if (e == NULL) {
		ENGINEerror(ERR_R_PASSED_NULL_PARAMETER);
		return 0;
	}
	if ((e->id == NULL) || (e->name == NULL)) {
		ENGINEerror(ENGINE_R_ID_OR_NAME_MISSING);
	}
	CRYPTO_w_lock(CRYPTO_LOCK_ENGINE);
	if (!engine_list_add(e)) {
		ENGINEerror(ENGINE_R_INTERNAL_LIST_ERROR);
		to_return = 0;
	}
	CRYPTO_w_unlock(CRYPTO_LOCK_ENGINE);
	return to_return;
}

/* Remove an existing "ENGINE" type from the array. */
int
ENGINE_remove(ENGINE *e)
{
	int to_return = 1;

	if (e == NULL) {
		ENGINEerror(ERR_R_PASSED_NULL_PARAMETER);
		return 0;
	}
	CRYPTO_w_lock(CRYPTO_LOCK_ENGINE);
	if (!engine_list_remove(e)) {
		ENGINEerror(ENGINE_R_INTERNAL_LIST_ERROR);
		to_return = 0;
	}
	CRYPTO_w_unlock(CRYPTO_LOCK_ENGINE);
	return to_return;
}

static void
engine_cpy(ENGINE *dest, const ENGINE *src)
{
	dest->id = src->id;
	dest->name = src->name;
#ifndef OPENSSL_NO_RSA
	dest->rsa_meth = src->rsa_meth;
#endif
#ifndef OPENSSL_NO_DSA
	dest->dsa_meth = src->dsa_meth;
#endif
#ifndef OPENSSL_NO_DH
	dest->dh_meth = src->dh_meth;
#endif
#ifndef OPENSSL_NO_ECDH
	dest->ecdh_meth = src->ecdh_meth;
#endif
#ifndef OPENSSL_NO_ECDSA
	dest->ecdsa_meth = src->ecdsa_meth;
#endif
	dest->rand_meth = src->rand_meth;
	dest->store_meth = src->store_meth;
	dest->ciphers = src->ciphers;
	dest->digests = src->digests;
	dest->pkey_meths = src->pkey_meths;
	dest->destroy = src->destroy;
	dest->init = src->init;
	dest->finish = src->finish;
	dest->ctrl = src->ctrl;
	dest->load_privkey = src->load_privkey;
	dest->load_pubkey = src->load_pubkey;
	dest->cmd_defns = src->cmd_defns;
	dest->flags = src->flags;
}

ENGINE *
ENGINE_by_id(const char *id)
{
	ENGINE *iterator;

	if (id == NULL) {
		ENGINEerror(ERR_R_PASSED_NULL_PARAMETER);
		return NULL;
	}
	CRYPTO_w_lock(CRYPTO_LOCK_ENGINE);
	iterator = engine_list_head;
	while (iterator && (strcmp(id, iterator->id) != 0))
		iterator = iterator->next;
	if (iterator) {
		/* We need to return a structural reference. If this is an
		 * ENGINE type that returns copies, make a duplicate - otherwise
		 * increment the existing ENGINE's reference count. */
		if (iterator->flags & ENGINE_FLAGS_BY_ID_COPY) {
			ENGINE *cp = ENGINE_new();
			if (!cp)
				iterator = NULL;
			else {
				engine_cpy(cp, iterator);
				iterator = cp;
			}
		} else {
			iterator->struct_ref++;
			engine_ref_debug(iterator, 0, 1)
		}
	}
	CRYPTO_w_unlock(CRYPTO_LOCK_ENGINE);

	if (iterator == NULL) {
		ENGINEerror(ENGINE_R_NO_SUCH_ENGINE);
		ERR_asprintf_error_data("id=%s", id);
	}
	return iterator;
}

int
ENGINE_up_ref(ENGINE *e)
{
	if (e == NULL) {
		ENGINEerror(ERR_R_PASSED_NULL_PARAMETER);
		return 0;
	}
	CRYPTO_add(&e->struct_ref, 1, CRYPTO_LOCK_ENGINE);
	return 1;
}


Generated by: GCOVR (Version 3.3)

Line	Branch	Exec	Source
1			/* $OpenBSD: eng_list.c,v 1.22 2017/01/29 17:49:23 beck Exp $ */
2			/* Written by Geoff Thorpe (geoff@geoffthorpe.net) for the OpenSSL
3			* project 2000.
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			* Copyright 2002 Sun Microsystems, Inc. ALL RIGHTS RESERVED.
60			* ECDH support in OpenSSL originally developed by
61			* SUN MICROSYSTEMS, INC., and contributed to the OpenSSL project.
62			*/
63
64			#include <string.h>
65			#include <unistd.h>
66
67			#include <openssl/opensslconf.h>
68
69			#include <openssl/err.h>
70
71			#include "cryptlib.h"
72			#include "eng_int.h"
73
74			/* The linked-list of pointers to engine types. engine_list_head
75			* incorporates an implicit structural reference but engine_list_tail
76			* does not - the latter is a computational niceity and only points
77			* to something that is already pointed to by its predecessor in the
78			* list (or engine_list_head itself). In the same way, the use of the
79			* "prev" pointer in each ENGINE is to save excessive list iteration,
80			* it doesn't correspond to an extra structural reference. Hence,
81			* engine_list_head, and each non-null "next" pointer account for
82			* the list itself assuming exactly 1 structural reference on each
83			* list member. */
84			static ENGINE *engine_list_head = NULL;
85			static ENGINE *engine_list_tail = NULL;
86
87			/* This cleanup function is only needed internally. If it should be called, we
88			* register it with the "ENGINE_cleanup()" stack to be called during cleanup. */
89
90			static void
91			engine_list_cleanup(void)
92			{
93		24	ENGINE *iterator = engine_list_head;
94
95	✗✓✗✗	24	while (iterator != NULL && ENGINE_remove(iterator))
96			iterator = engine_list_head;
97		12	}
98
99			/* These static functions starting with a lower case "engine_" always
100			* take place when CRYPTO_LOCK_ENGINE has been locked up. */
101			static int
102			engine_list_add(ENGINE *e)
103			{
104			int conflict = 0;
105			ENGINE *iterator = NULL;
106
107	✗✓	3108	if (e == NULL) {
108			ENGINEerror(ERR_R_PASSED_NULL_PARAMETER);
109			return 0;
110			}
111		1554	iterator = engine_list_head;
112	✓✓✓✓	1180482	while (iterator && !conflict) {
113		392457	conflict = (strcmp(iterator->id, e->id) == 0);
114		392457	iterator = iterator->next;
115			}
116	✓✓	1554	if (conflict) {
117		3	ENGINEerror(ENGINE_R_CONFLICTING_ENGINE_ID);
118		3	return 0;
119			}
120	✓✓	1551	if (engine_list_head == NULL) {
121			/* We are adding to an empty list. */
122	✗✓	12	if (engine_list_tail) {
123			ENGINEerror(ENGINE_R_INTERNAL_LIST_ERROR);
124			return 0;
125			}
126		12	engine_list_head = e;
127		12	e->prev = NULL;
128			/* The first time the list allocates, we should register the
129			* cleanup. */
130		12	engine_cleanup_add_last(engine_list_cleanup);
131		12	} else {
132			/* We are adding to the tail of an existing list. */
133	✓✗✗✓	3078	if ((engine_list_tail == NULL) \|\|
134		1539	(engine_list_tail->next != NULL)) {
135			ENGINEerror(ENGINE_R_INTERNAL_LIST_ERROR);
136			return 0;
137			}
138		1539	engine_list_tail->next = e;
139		1539	e->prev = engine_list_tail;
140			}
141			/* Having the engine in the list assumes a structural
142			* reference. */
143		1551	e->struct_ref++;
144			engine_ref_debug(e, 0, 1)
145			/* However it came to be, e is the last item in the list. */
146		1551	engine_list_tail = e;
147		1551	e->next = NULL;
148		1551	return 1;
149		1554	}
150
151			static int
152			engine_list_remove(ENGINE *e)
153			{
154			ENGINE *iterator;
155
156	✗✓	3108	if (e == NULL) {
157			ENGINEerror(ERR_R_PASSED_NULL_PARAMETER);
158			return 0;
159			}
160			/* We need to check that e is in our linked list! */
161		1554	iterator = engine_list_head;
162	✓✓✓✓	6249	while (iterator && (iterator != e))
163		9	iterator = iterator->next;
164	✓✓	1554	if (iterator == NULL) {
165		3	ENGINEerror(ENGINE_R_ENGINE_IS_NOT_IN_LIST);
166		3	return 0;
167			}
168			/* un-link e from the chain. */
169	✓✓	1551	if (e->next)
170		1536	e->next->prev = e->prev;
171	✓✓	1551	if (e->prev)
172		3	e->prev->next = e->next;
173			/* Correct our head/tail if necessary. */
174	✓✓	1551	if (engine_list_head == e)
175		1548	engine_list_head = e->next;
176	✓✓	1551	if (engine_list_tail == e)
177		15	engine_list_tail = e->prev;
178		1551	engine_free_util(e, 0);
179		1551	return 1;
180		1554	}
181
182			/* Get the first/last "ENGINE" type available. */
183			ENGINE *
184			ENGINE_get_first(void)
185			{
186			ENGINE *ret;
187
188		3452	CRYPTO_w_lock(CRYPTO_LOCK_ENGINE);
189		1726	ret = engine_list_head;
190	✓✓	1726	if (ret) {
191		1554	ret->struct_ref++;
192			engine_ref_debug(ret, 0, 1)
193		1554	}
194		1726	CRYPTO_w_unlock(CRYPTO_LOCK_ENGINE);
195		1726	return ret;
196			}
197
198			ENGINE *
199			ENGINE_get_last(void)
200			{
201			ENGINE *ret;
202
203			CRYPTO_w_lock(CRYPTO_LOCK_ENGINE);
204			ret = engine_list_tail;
205			if (ret) {
206			ret->struct_ref++;
207			engine_ref_debug(ret, 0, 1)
208			}
209			CRYPTO_w_unlock(CRYPTO_LOCK_ENGINE);
210			return ret;
211			}
212
213			/* Iterate to the next/previous "ENGINE" type (NULL = end of the list). */
214			ENGINE *
215			ENGINE_get_next(ENGINE *e)
216			{
217			ENGINE *ret = NULL;
218
219	✗✓	42	if (e == NULL) {
220			ENGINEerror(ERR_R_PASSED_NULL_PARAMETER);
221			return 0;
222			}
223		21	CRYPTO_w_lock(CRYPTO_LOCK_ENGINE);
224		21	ret = e->next;
225	✓✓	21	if (ret) {
226			/* Return a valid structural refernce to the next ENGINE */
227		6	ret->struct_ref++;
228			engine_ref_debug(ret, 0, 1)
229		6	}
230		21	CRYPTO_w_unlock(CRYPTO_LOCK_ENGINE);
231			/* Release the structural reference to the previous ENGINE */
232		21	ENGINE_free(e);
233		21	return ret;
234		21	}
235
236			ENGINE *
237			ENGINE_get_prev(ENGINE *e)
238			{
239			ENGINE *ret = NULL;
240
241			if (e == NULL) {
242			ENGINEerror(ERR_R_PASSED_NULL_PARAMETER);
243			return 0;
244			}
245			CRYPTO_w_lock(CRYPTO_LOCK_ENGINE);
246			ret = e->prev;
247			if (ret) {
248			/* Return a valid structural reference to the next ENGINE */
249			ret->struct_ref++;
250			engine_ref_debug(ret, 0, 1)
251			}
252			CRYPTO_w_unlock(CRYPTO_LOCK_ENGINE);
253			/* Release the structural reference to the previous ENGINE */
254			ENGINE_free(e);
255			return ret;
256			}
257
258			/* Add another "ENGINE" type into the list. */
259			int
260			ENGINE_add(ENGINE *e)
261			{
262			int to_return = 1;
263
264	✗✓	3108	if (e == NULL) {
265			ENGINEerror(ERR_R_PASSED_NULL_PARAMETER);
266			return 0;
267			}
268	✓✗✗✓	3108	if ((e->id == NULL) \|\| (e->name == NULL)) {
269			ENGINEerror(ENGINE_R_ID_OR_NAME_MISSING);
270			}
271		1554	CRYPTO_w_lock(CRYPTO_LOCK_ENGINE);
272	✓✓	1554	if (!engine_list_add(e)) {
273		3	ENGINEerror(ENGINE_R_INTERNAL_LIST_ERROR);
274			to_return = 0;
275		3	}
276		1554	CRYPTO_w_unlock(CRYPTO_LOCK_ENGINE);
277		1554	return to_return;
278		1554	}
279
280			/* Remove an existing "ENGINE" type from the array. */
281			int
282			ENGINE_remove(ENGINE *e)
283			{
284			int to_return = 1;
285
286	✗✓	3108	if (e == NULL) {
287			ENGINEerror(ERR_R_PASSED_NULL_PARAMETER);
288			return 0;
289			}
290		1554	CRYPTO_w_lock(CRYPTO_LOCK_ENGINE);
291	✓✓	1554	if (!engine_list_remove(e)) {
292		3	ENGINEerror(ENGINE_R_INTERNAL_LIST_ERROR);
293			to_return = 0;
294		3	}
295		1554	CRYPTO_w_unlock(CRYPTO_LOCK_ENGINE);
296		1554	return to_return;
297		1554	}
298
299			static void
300			engine_cpy(ENGINE dest, const ENGINE src)
301			{
302			dest->id = src->id;
303			dest->name = src->name;
304			#ifndef OPENSSL_NO_RSA
305			dest->rsa_meth = src->rsa_meth;
306			#endif
307			#ifndef OPENSSL_NO_DSA
308			dest->dsa_meth = src->dsa_meth;
309			#endif
310			#ifndef OPENSSL_NO_DH
311			dest->dh_meth = src->dh_meth;
312			#endif
313			#ifndef OPENSSL_NO_ECDH
314			dest->ecdh_meth = src->ecdh_meth;
315			#endif
316			#ifndef OPENSSL_NO_ECDSA
317			dest->ecdsa_meth = src->ecdsa_meth;
318			#endif
319			dest->rand_meth = src->rand_meth;
320			dest->store_meth = src->store_meth;
321			dest->ciphers = src->ciphers;
322			dest->digests = src->digests;
323			dest->pkey_meths = src->pkey_meths;
324			dest->destroy = src->destroy;
325			dest->init = src->init;
326			dest->finish = src->finish;
327			dest->ctrl = src->ctrl;
328			dest->load_privkey = src->load_privkey;
329			dest->load_pubkey = src->load_pubkey;
330			dest->cmd_defns = src->cmd_defns;
331			dest->flags = src->flags;
332			}
333
334			ENGINE *
335			ENGINE_by_id(const char *id)
336			{
337			ENGINE *iterator;
338
339			if (id == NULL) {
340			ENGINEerror(ERR_R_PASSED_NULL_PARAMETER);
341			return NULL;
342			}
343			CRYPTO_w_lock(CRYPTO_LOCK_ENGINE);
344			iterator = engine_list_head;
345			while (iterator && (strcmp(id, iterator->id) != 0))
346			iterator = iterator->next;
347			if (iterator) {
348			/* We need to return a structural reference. If this is an
349			* ENGINE type that returns copies, make a duplicate - otherwise
350			* increment the existing ENGINE's reference count. */
351			if (iterator->flags & ENGINE_FLAGS_BY_ID_COPY) {
352			ENGINE *cp = ENGINE_new();
353			if (!cp)
354			iterator = NULL;
355			else {
356			engine_cpy(cp, iterator);
357			iterator = cp;
358			}
359			} else {
360			iterator->struct_ref++;
361			engine_ref_debug(iterator, 0, 1)
362			}
363			}
364			CRYPTO_w_unlock(CRYPTO_LOCK_ENGINE);
365
366			if (iterator == NULL) {
367			ENGINEerror(ENGINE_R_NO_SUCH_ENGINE);
368			ERR_asprintf_error_data("id=%s", id);
369			}
370			return iterator;
371			}
372
373			int
374			ENGINE_up_ref(ENGINE *e)
375			{
376			if (e == NULL) {
377			ENGINEerror(ERR_R_PASSED_NULL_PARAMETER);
378			return 0;
379			}
380			CRYPTO_add(&e->struct_ref, 1, CRYPTO_LOCK_ENGINE);
381			return 1;
382			}