eng_cnf.c revision e45f106cb6b47af1f21efe76e933bdea2f5dd1ca 
1/* eng_cnf.c */
2/* Written by Stephen Henson (steve@openssl.org) for the OpenSSL
3 * project 2001.
4 */
5/* ====================================================================
6 * Copyright (c) 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#include "eng_int.h"
60#include <openssl/conf.h>
61
62/* #define ENGINE_CONF_DEBUG */
63
64/* ENGINE config module */
65
66static char *skip_dot(char *name)
67	{
68	char *p;
69	p = strchr(name, '.');
70	if (p)
71		return p + 1;
72	return name;
73	}
74
75static STACK_OF(ENGINE) *initialized_engines = NULL;
76
77static int int_engine_init(ENGINE *e)
78	{
79	if (!ENGINE_init(e))
80		return 0;
81	if (!initialized_engines)
82		initialized_engines = sk_ENGINE_new_null();
83	if (!initialized_engines || !sk_ENGINE_push(initialized_engines, e))
84		{
85		ENGINE_finish(e);
86		return 0;
87		}
88	return 1;
89	}
90
91
92static int int_engine_configure(char *name, char *value, const CONF *cnf)
93	{
94	int i;
95	int ret = 0;
96	long do_init = -1;
97	STACK_OF(CONF_VALUE) *ecmds;
98	CONF_VALUE *ecmd;
99	char *ctrlname, *ctrlvalue;
100	ENGINE *e = NULL;
101	int soft = 0;
102
103	name = skip_dot(name);
104#ifdef ENGINE_CONF_DEBUG
105	fprintf(stderr, "Configuring engine %s\n", name);
106#endif
107	/* Value is a section containing ENGINE commands */
108	ecmds = NCONF_get_section(cnf, value);
109
110	if (!ecmds)
111		{
112		ENGINEerr(ENGINE_F_INT_ENGINE_CONFIGURE, ENGINE_R_ENGINE_SECTION_ERROR);
113		return 0;
114		}
115
116	for (i = 0; i < sk_CONF_VALUE_num(ecmds); i++)
117		{
118		ecmd = sk_CONF_VALUE_value(ecmds, i);
119		ctrlname = skip_dot(ecmd->name);
120		ctrlvalue = ecmd->value;
121#ifdef ENGINE_CONF_DEBUG
122	fprintf(stderr, "ENGINE conf: doing ctrl(%s,%s)\n", ctrlname, ctrlvalue);
123#endif
124
125		/* First handle some special pseudo ctrls */
126
127		/* Override engine name to use */
128		if (!strcmp(ctrlname, "engine_id"))
129			name = ctrlvalue;
130		else if (!strcmp(ctrlname, "soft_load"))
131			soft = 1;
132		/* Load a dynamic ENGINE */
133		else if (!strcmp(ctrlname, "dynamic_path"))
134			{
135			e = ENGINE_by_id("dynamic");
136			if (!e)
137				goto err;
138			if (!ENGINE_ctrl_cmd_string(e, "SO_PATH", ctrlvalue, 0))
139				goto err;
140			if (!ENGINE_ctrl_cmd_string(e, "LIST_ADD", "2", 0))
141				goto err;
142			if (!ENGINE_ctrl_cmd_string(e, "LOAD", NULL, 0))
143				goto err;
144			}
145		/* ... add other pseudos here ... */
146		else
147			{
148			/* At this point we need an ENGINE structural reference
149			 * if we don't already have one.
150			 */
151			if (!e)
152				{
153				e = ENGINE_by_id(name);
154				if (!e && soft)
155					{
156					ERR_clear_error();
157					return 1;
158					}
159				if (!e)
160					return 0;
161				}
162			/* Allow "EMPTY" to mean no value: this allows a valid
163			 * "value" to be passed to ctrls of type NO_INPUT
164		 	 */
165			if (!strcmp(ctrlvalue, "EMPTY"))
166				ctrlvalue = NULL;
167			if (!strcmp(ctrlname, "init"))
168				{
169				if (!NCONF_get_number_e(cnf, value, "init", &do_init))
170					goto err;
171				if (do_init == 1)
172					{
173					if (!int_engine_init(e))
174						goto err;
175					}
176				else if (do_init != 0)
177					{
178					ENGINEerr(ENGINE_F_INT_ENGINE_CONFIGURE, ENGINE_R_INVALID_INIT_VALUE);
179					goto err;
180					}
181				}
182			else if (!strcmp(ctrlname, "default_algorithms"))
183				{
184				if (!ENGINE_set_default_string(e, ctrlvalue))
185					goto err;
186				}
187			else if (!ENGINE_ctrl_cmd_string(e,
188					ctrlname, ctrlvalue, 0))
189				return 0;
190			}
191
192
193
194		}
195	if (e && (do_init == -1) && !int_engine_init(e))
196		goto err;
197	ret = 1;
198	err:
199	if (e)
200		ENGINE_free(e);
201	return ret;
202	}
203
204
205static int int_engine_module_init(CONF_IMODULE *md, const CONF *cnf)
206	{
207	STACK_OF(CONF_VALUE) *elist;
208	CONF_VALUE *cval;
209	int i;
210#ifdef ENGINE_CONF_DEBUG
211	fprintf(stderr, "Called engine module: name %s, value %s\n",
212			CONF_imodule_get_name(md), CONF_imodule_get_value(md));
213#endif
214	/* Value is a section containing ENGINEs to configure */
215	elist = NCONF_get_section(cnf, CONF_imodule_get_value(md));
216
217	if (!elist)
218		{
219		ENGINEerr(ENGINE_F_INT_ENGINE_MODULE_INIT, ENGINE_R_ENGINES_SECTION_ERROR);
220		return 0;
221		}
222
223	for (i = 0; i < sk_CONF_VALUE_num(elist); i++)
224		{
225		cval = sk_CONF_VALUE_value(elist, i);
226		if (!int_engine_configure(cval->name, cval->value, cnf))
227			return 0;
228		}
229
230	return 1;
231	}
232
233static void int_engine_module_finish(CONF_IMODULE *md)
234	{
235	ENGINE *e;
236	while ((e = sk_ENGINE_pop(initialized_engines)))
237		ENGINE_finish(e);
238	sk_ENGINE_free(initialized_engines);
239	initialized_engines = NULL;
240	}
241
242
243void ENGINE_add_conf_module(void)
244	{
245	CONF_module_add("engines",
246			int_engine_module_init,
247			int_engine_module_finish);
248	}
249