Head

GCC Code Coverage Report

Directory:	./		Exec	Total	Coverage
File:	lib/libcrypto/conf/conf_mod.c	Lines:	45	192	23.4 %
Date:	2017-11-13	Branches:	18	138	13.0 %


/* $OpenBSD: conf_mod.c,v 1.27 2017/01/29 17:49:22 beck Exp $ */
/* Written by Stephen Henson (steve@openssl.org) for the OpenSSL
 * project 2001.
 */
/* ====================================================================
 * Copyright (c) 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 <ctype.h>
#include <stdio.h>
#include <string.h>
#include <unistd.h>

#include <openssl/conf.h>
#include <openssl/crypto.h>
#include <openssl/dso.h>
#include <openssl/err.h>
#include <openssl/x509.h>

#define DSO_mod_init_name "OPENSSL_init"
#define DSO_mod_finish_name "OPENSSL_finish"

/* This structure contains a data about supported modules.
 * entries in this table correspond to either dynamic or
 * static modules.
 */

struct conf_module_st {
	/* DSO of this module or NULL if static */
	DSO *dso;
	/* Name of the module */
	char *name;
	/* Init function */
	conf_init_func *init;
	/* Finish function */
	conf_finish_func *finish;
	/* Number of successfully initialized modules */
	int links;
	void *usr_data;
};


/* This structure contains information about modules that have been
 * successfully initialized. There may be more than one entry for a
 * given module.
 */

struct conf_imodule_st {
	CONF_MODULE *pmod;
	char *name;
	char *value;
	unsigned long flags;
	void *usr_data;
};

static STACK_OF(CONF_MODULE) *supported_modules = NULL;
static STACK_OF(CONF_IMODULE) *initialized_modules = NULL;

static void module_free(CONF_MODULE *md);
static void module_finish(CONF_IMODULE *imod);
static int module_run(const CONF *cnf, char *name, char *value,
    unsigned long flags);
static CONF_MODULE *module_add(DSO *dso, const char *name,
    conf_init_func *ifunc, conf_finish_func *ffunc);
static CONF_MODULE *module_find(char *name);
static int module_init(CONF_MODULE *pmod, char *name, char *value,
    const CONF *cnf);
static CONF_MODULE *module_load_dso(const CONF *cnf, char *name, char *value,
    unsigned long flags);

/* Main function: load modules from a CONF structure */

int
CONF_modules_load(const CONF *cnf, const char *appname, unsigned long flags)
{
	STACK_OF(CONF_VALUE) *values;
	CONF_VALUE *vl;
	char *vsection = NULL;

	int ret, i;

	if (!cnf)
		return 1;

	if (appname)
		vsection = NCONF_get_string(cnf, NULL, appname);

	if (!appname || (!vsection && (flags & CONF_MFLAGS_DEFAULT_SECTION)))
		vsection = NCONF_get_string(cnf, NULL, "openssl_conf");

	if (!vsection) {
		ERR_clear_error();
		return 1;
	}

	values = NCONF_get_section(cnf, vsection);

	if (!values)
		return 0;

	for (i = 0; i < sk_CONF_VALUE_num(values); i++) {
		vl = sk_CONF_VALUE_value(values, i);
		ret = module_run(cnf, vl->name, vl->value, flags);
		if (ret <= 0)
			if (!(flags & CONF_MFLAGS_IGNORE_ERRORS))
				return ret;
	}

	return 1;
}

int
CONF_modules_load_file(const char *filename, const char *appname,
    unsigned long flags)
{
	char *file = NULL;
	CONF *conf = NULL;
	int ret = 0;
	conf = NCONF_new(NULL);
	if (!conf)
		goto err;

	if (filename == NULL) {
		file = CONF_get1_default_config_file();
		if (!file)
			goto err;
	} else
		file = (char *)filename;

	if (NCONF_load(conf, file, NULL) <= 0) {
		if ((flags & CONF_MFLAGS_IGNORE_MISSING_FILE) &&
		    (ERR_GET_REASON(ERR_peek_last_error()) ==
		    CONF_R_NO_SUCH_FILE)) {
			ERR_clear_error();
			ret = 1;
		}
		goto err;
	}

	ret = CONF_modules_load(conf, appname, flags);

err:
	if (filename == NULL)
		free(file);
	NCONF_free(conf);

	return ret;
}

static int
module_run(const CONF *cnf, char *name, char *value, unsigned long flags)
{
	CONF_MODULE *md;
	int ret;

	md = module_find(name);

	/* Module not found: try to load DSO */
	if (!md && !(flags & CONF_MFLAGS_NO_DSO))
		md = module_load_dso(cnf, name, value, flags);

	if (!md) {
		if (!(flags & CONF_MFLAGS_SILENT)) {
			CONFerror(CONF_R_UNKNOWN_MODULE_NAME);
			ERR_asprintf_error_data("module=%s", name);
		}
		return -1;
	}

	ret = module_init(md, name, value, cnf);

	if (ret <= 0) {
		if (!(flags & CONF_MFLAGS_SILENT)) {
			CONFerror(CONF_R_MODULE_INITIALIZATION_ERROR);
			ERR_asprintf_error_data
			    ("module=%s, value=%s, retcode=%-8d",
			    name, value, ret);
		}
	}

	return ret;
}

/* Load a module from a DSO */
static CONF_MODULE *
module_load_dso(const CONF *cnf, char *name, char *value, unsigned long flags)
{
	DSO *dso = NULL;
	conf_init_func *ifunc;
	conf_finish_func *ffunc;
	char *path = NULL;
	int errcode = 0;
	CONF_MODULE *md;

	/* Look for alternative path in module section */
	path = NCONF_get_string(cnf, value, "path");
	if (!path) {
		ERR_clear_error();
		path = name;
	}
	dso = DSO_load(NULL, path, NULL, 0);
	if (!dso) {
		errcode = CONF_R_ERROR_LOADING_DSO;
		goto err;
	}
	ifunc = (conf_init_func *)DSO_bind_func(dso, DSO_mod_init_name);
	if (!ifunc) {
		errcode = CONF_R_MISSING_INIT_FUNCTION;
		goto err;
	}
	ffunc = (conf_finish_func *)DSO_bind_func(dso, DSO_mod_finish_name);
	/* All OK, add module */
	md = module_add(dso, name, ifunc, ffunc);

	if (!md)
		goto err;

	return md;

err:
	if (dso)
		DSO_free(dso);
	CONFerror(errcode);
	ERR_asprintf_error_data("module=%s, path=%s", name, path);
	return NULL;
}

/* add module to list */
static CONF_MODULE *
module_add(DSO *dso, const char *name, conf_init_func *ifunc,
    conf_finish_func *ffunc)
{
	CONF_MODULE *tmod = NULL;

	if (name == NULL)
		return NULL;
	if (supported_modules == NULL)
		supported_modules = sk_CONF_MODULE_new_null();
	if (supported_modules == NULL)
		return NULL;
	tmod = malloc(sizeof(CONF_MODULE));
	if (tmod == NULL)
		return NULL;

	tmod->dso = dso;
	tmod->name = strdup(name);
	tmod->init = ifunc;
	tmod->finish = ffunc;
	tmod->links = 0;

	if (!sk_CONF_MODULE_push(supported_modules, tmod)) {
		free(tmod);
		return NULL;
	}

	return tmod;
}

/* Find a module from the list. We allow module names of the
 * form modname.XXXX to just search for modname to allow the
 * same module to be initialized more than once.
 */

static CONF_MODULE *
module_find(char *name)
{
	CONF_MODULE *tmod;
	int i, nchar;
	char *p;

	p = strrchr(name, '.');

	if (p)
		nchar = p - name;
	else
		nchar = strlen(name);

	for (i = 0; i < sk_CONF_MODULE_num(supported_modules); i++) {
		tmod = sk_CONF_MODULE_value(supported_modules, i);
		if (!strncmp(tmod->name, name, nchar))
			return tmod;
	}

	return NULL;
}

/* initialize a module */
static int
module_init(CONF_MODULE *pmod, char *name, char *value, const CONF *cnf)
{
	int ret = 1;
	int init_called = 0;
	CONF_IMODULE *imod = NULL;

	/* Otherwise add initialized module to list */
	imod = malloc(sizeof(CONF_IMODULE));
	if (!imod)
		goto err;

	imod->pmod = pmod;
	imod->name = name ? strdup(name) : NULL;
	imod->value = value ? strdup(value) : NULL;
	imod->usr_data = NULL;

	if (!imod->name || !imod->value)
		goto memerr;

	/* Try to initialize module */
	if (pmod->init) {
		ret = pmod->init(imod, cnf);
		init_called = 1;
		/* Error occurred, exit */
		if (ret <= 0)
			goto err;
	}

	if (initialized_modules == NULL) {
		initialized_modules = sk_CONF_IMODULE_new_null();
		if (!initialized_modules) {
			CONFerror(ERR_R_MALLOC_FAILURE);
			goto err;
		}
	}

	if (!sk_CONF_IMODULE_push(initialized_modules, imod)) {
		CONFerror(ERR_R_MALLOC_FAILURE);
		goto err;
	}

	pmod->links++;

	return ret;

err:
	/* We've started the module so we'd better finish it */
	if (pmod->finish && init_called)
		pmod->finish(imod);

memerr:
	if (imod) {
		free(imod->name);
		free(imod->value);
		free(imod);
	}

	return -1;
}

/* Unload any dynamic modules that have a link count of zero:
 * i.e. have no active initialized modules. If 'all' is set
 * then all modules are unloaded including static ones.
 */

void
CONF_modules_unload(int all)
{
	int i;
	CONF_MODULE *md;

	CONF_modules_finish();

	/* unload modules in reverse order */
	for (i = sk_CONF_MODULE_num(supported_modules) - 1; i >= 0; i--) {
		md = sk_CONF_MODULE_value(supported_modules, i);
		/* If static or in use and 'all' not set ignore it */
		if (((md->links > 0) || !md->dso) && !all)
			continue;
		/* Since we're working in reverse this is OK */
		(void)sk_CONF_MODULE_delete(supported_modules, i);
		module_free(md);
	}
	if (sk_CONF_MODULE_num(supported_modules) == 0) {
		sk_CONF_MODULE_free(supported_modules);
		supported_modules = NULL;
	}
}

/* unload a single module */
static void
module_free(CONF_MODULE *md)
{
	if (md->dso)
		DSO_free(md->dso);
	free(md->name);
	free(md);
}

/* finish and free up all modules instances */

void
CONF_modules_finish(void)
{
	CONF_IMODULE *imod;

	while (sk_CONF_IMODULE_num(initialized_modules) > 0) {
		imod = sk_CONF_IMODULE_pop(initialized_modules);
		module_finish(imod);
	}
	sk_CONF_IMODULE_free(initialized_modules);
	initialized_modules = NULL;
}

/* finish a module instance */

static void
module_finish(CONF_IMODULE *imod)
{
	if (imod->pmod->finish)
		imod->pmod->finish(imod);
	imod->pmod->links--;
	free(imod->name);
	free(imod->value);
	free(imod);
}

/* Add a static module to OpenSSL */

int
CONF_module_add(const char *name, conf_init_func *ifunc,
    conf_finish_func *ffunc)
{
	if (module_add(NULL, name, ifunc, ffunc))
		return 1;
	else
		return 0;
}

void
CONF_modules_free(void)
{
	CONF_modules_finish();
	CONF_modules_unload(1);
}

/* Utility functions */

const char *
CONF_imodule_get_name(const CONF_IMODULE *md)
{
	return md->name;
}

const char *
CONF_imodule_get_value(const CONF_IMODULE *md)
{
	return md->value;
}

void *
CONF_imodule_get_usr_data(const CONF_IMODULE *md)
{
	return md->usr_data;
}

void
CONF_imodule_set_usr_data(CONF_IMODULE *md, void *usr_data)
{
	md->usr_data = usr_data;
}

CONF_MODULE *
CONF_imodule_get_module(const CONF_IMODULE *md)
{
	return md->pmod;
}

unsigned long
CONF_imodule_get_flags(const CONF_IMODULE *md)
{
	return md->flags;
}

void
CONF_imodule_set_flags(CONF_IMODULE *md, unsigned long flags)
{
	md->flags = flags;
}

void *
CONF_module_get_usr_data(CONF_MODULE *pmod)
{
	return pmod->usr_data;
}

void
CONF_module_set_usr_data(CONF_MODULE *pmod, void *usr_data)
{
	pmod->usr_data = usr_data;
}

/* Return default config file name */

char *
CONF_get1_default_config_file(void)
{
	char *file = NULL;

	if (asprintf(&file, "%s/openssl.cnf",
	    X509_get_default_cert_area()) == -1)
		return (NULL);
	return file;
}

/* This function takes a list separated by 'sep' and calls the
 * callback function giving the start and length of each member
 * optionally stripping leading and trailing whitespace. This can
 * be used to parse comma separated lists for example.
 */

int
CONF_parse_list(const char *list_, int sep, int nospc,
    int (*list_cb)(const char *elem, int len, void *usr), void *arg)
{
	int ret;
	const char *lstart, *tmpend, *p;

	if (list_ == NULL) {
		CONFerror(CONF_R_LIST_CANNOT_BE_NULL);
		return 0;
	}

	lstart = list_;
	for (;;) {
		if (nospc) {
			while (*lstart && isspace((unsigned char)*lstart))
				lstart++;
		}
		p = strchr(lstart, sep);
		if (p == lstart || !*lstart)
			ret = list_cb(NULL, 0, arg);
		else {
			if (p)
				tmpend = p - 1;
			else
				tmpend = lstart + strlen(lstart) - 1;
			if (nospc) {
				while (isspace((unsigned char)*tmpend))
					tmpend--;
			}
			ret = list_cb(lstart, tmpend - lstart + 1, arg);
		}
		if (ret <= 0)
			return ret;
		if (p == NULL)
			return 1;
		lstart = p + 1;
	}
}


Generated by: GCOVR (Version 3.3)

Line	Branch	Exec	Source
1			/* $OpenBSD: conf_mod.c,v 1.27 2017/01/29 17:49:22 beck Exp $ */
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 <ctype.h>
60			#include <stdio.h>
61			#include <string.h>
62			#include <unistd.h>
63
64			#include <openssl/conf.h>
65			#include <openssl/crypto.h>
66			#include <openssl/dso.h>
67			#include <openssl/err.h>
68			#include <openssl/x509.h>
69
70			#define DSO_mod_init_name "OPENSSL_init"
71			#define DSO_mod_finish_name "OPENSSL_finish"
72
73			/* This structure contains a data about supported modules.
74			* entries in this table correspond to either dynamic or
75			* static modules.
76			*/
77
78			struct conf_module_st {
79			/* DSO of this module or NULL if static */
80			DSO *dso;
81			/* Name of the module */
82			char *name;
83			/* Init function */
84			conf_init_func *init;
85			/* Finish function */
86			conf_finish_func *finish;
87			/* Number of successfully initialized modules */
88			int links;
89			void *usr_data;
90			};
91
92
93			/* This structure contains information about modules that have been
94			* successfully initialized. There may be more than one entry for a
95			* given module.
96			*/
97
98			struct conf_imodule_st {
99			CONF_MODULE *pmod;
100			char *name;
101			char *value;
102			unsigned long flags;
103			void *usr_data;
104			};
105
106			static STACK_OF(CONF_MODULE) *supported_modules = NULL;
107			static STACK_OF(CONF_IMODULE) *initialized_modules = NULL;
108
109			static void module_free(CONF_MODULE *md);
110			static void module_finish(CONF_IMODULE *imod);
111			static int module_run(const CONF cnf, char name, char *value,
112			unsigned long flags);
113			static CONF_MODULE module_add(DSO dso, const char *name,
114			conf_init_func ifunc, conf_finish_func ffunc);
115			static CONF_MODULE module_find(char name);
116			static int module_init(CONF_MODULE pmod, char name, char *value,
117			const CONF *cnf);
118			static CONF_MODULE module_load_dso(const CONF cnf, char name, char value,
119			unsigned long flags);
120
121			/* Main function: load modules from a CONF structure */
122
123			int
124			CONF_modules_load(const CONF cnf, const char appname, unsigned long flags)
125			{
126			STACK_OF(CONF_VALUE) *values;
127			CONF_VALUE *vl;
128			char *vsection = NULL;
129
130			int ret, i;
131
132	✗✓	2786	if (!cnf)
133			return 1;
134
135	✗✓	1393	if (appname)
136			vsection = NCONF_get_string(cnf, NULL, appname);
137
138	✗✓✗✗ ✗✗	1393	if (!appname \|\| (!vsection && (flags & CONF_MFLAGS_DEFAULT_SECTION)))
139		1393	vsection = NCONF_get_string(cnf, NULL, "openssl_conf");
140
141	✓✗	1393	if (!vsection) {
142		1393	ERR_clear_error();
143		1393	return 1;
144			}
145
146			values = NCONF_get_section(cnf, vsection);
147
148			if (!values)
149			return 0;
150
151			for (i = 0; i < sk_CONF_VALUE_num(values); i++) {
152			vl = sk_CONF_VALUE_value(values, i);
153			ret = module_run(cnf, vl->name, vl->value, flags);
154			if (ret <= 0)
155			if (!(flags & CONF_MFLAGS_IGNORE_ERRORS))
156			return ret;
157			}
158
159			return 1;
160		1393	}
161
162			int
163			CONF_modules_load_file(const char filename, const char appname,
164			unsigned long flags)
165			{
166			char *file = NULL;
167			CONF *conf = NULL;
168			int ret = 0;
169			conf = NCONF_new(NULL);
170			if (!conf)
171			goto err;
172
173			if (filename == NULL) {
174			file = CONF_get1_default_config_file();
175			if (!file)
176			goto err;
177			} else
178			file = (char *)filename;
179
180			if (NCONF_load(conf, file, NULL) <= 0) {
181			if ((flags & CONF_MFLAGS_IGNORE_MISSING_FILE) &&
182			(ERR_GET_REASON(ERR_peek_last_error()) ==
183			CONF_R_NO_SUCH_FILE)) {
184			ERR_clear_error();
185			ret = 1;
186			}
187			goto err;
188			}
189
190			ret = CONF_modules_load(conf, appname, flags);
191
192			err:
193			if (filename == NULL)
194			free(file);
195			NCONF_free(conf);
196
197			return ret;
198			}
199
200			static int
201			module_run(const CONF cnf, char name, char *value, unsigned long flags)
202			{
203			CONF_MODULE *md;
204			int ret;
205
206			md = module_find(name);
207
208			/* Module not found: try to load DSO */
209			if (!md && !(flags & CONF_MFLAGS_NO_DSO))
210			md = module_load_dso(cnf, name, value, flags);
211
212			if (!md) {
213			if (!(flags & CONF_MFLAGS_SILENT)) {
214			CONFerror(CONF_R_UNKNOWN_MODULE_NAME);
215			ERR_asprintf_error_data("module=%s", name);
216			}
217			return -1;
218			}
219
220			ret = module_init(md, name, value, cnf);
221
222			if (ret <= 0) {
223			if (!(flags & CONF_MFLAGS_SILENT)) {
224			CONFerror(CONF_R_MODULE_INITIALIZATION_ERROR);
225			ERR_asprintf_error_data
226			("module=%s, value=%s, retcode=%-8d",
227			name, value, ret);
228			}
229			}
230
231			return ret;
232			}
233
234			/* Load a module from a DSO */
235			static CONF_MODULE *
236			module_load_dso(const CONF cnf, char name, char *value, unsigned long flags)
237			{
238			DSO *dso = NULL;
239			conf_init_func *ifunc;
240			conf_finish_func *ffunc;
241			char *path = NULL;
242			int errcode = 0;
243			CONF_MODULE *md;
244
245			/* Look for alternative path in module section */
246			path = NCONF_get_string(cnf, value, "path");
247			if (!path) {
248			ERR_clear_error();
249			path = name;
250			}
251			dso = DSO_load(NULL, path, NULL, 0);
252			if (!dso) {
253			errcode = CONF_R_ERROR_LOADING_DSO;
254			goto err;
255			}
256			ifunc = (conf_init_func *)DSO_bind_func(dso, DSO_mod_init_name);
257			if (!ifunc) {
258			errcode = CONF_R_MISSING_INIT_FUNCTION;
259			goto err;
260			}
261			ffunc = (conf_finish_func *)DSO_bind_func(dso, DSO_mod_finish_name);
262			/* All OK, add module */
263			md = module_add(dso, name, ifunc, ffunc);
264
265			if (!md)
266			goto err;
267
268			return md;
269
270			err:
271			if (dso)
272			DSO_free(dso);
273			CONFerror(errcode);
274			ERR_asprintf_error_data("module=%s, path=%s", name, path);
275			return NULL;
276			}
277
278			/* add module to list */
279			static CONF_MODULE *
280			module_add(DSO dso, const char name, conf_init_func *ifunc,
281			conf_finish_func *ffunc)
282			{
283			CONF_MODULE *tmod = NULL;
284
285	✗✓	5584	if (name == NULL)
286			return NULL;
287	✓✓	2792	if (supported_modules == NULL)
288		1396	supported_modules = sk_CONF_MODULE_new_null();
289	✗✓	2792	if (supported_modules == NULL)
290			return NULL;
291		2792	tmod = malloc(sizeof(CONF_MODULE));
292	✗✓	2792	if (tmod == NULL)
293			return NULL;
294
295		2792	tmod->dso = dso;
296		2792	tmod->name = strdup(name);
297		2792	tmod->init = ifunc;
298		2792	tmod->finish = ffunc;
299		2792	tmod->links = 0;
300
301	✗✓	2792	if (!sk_CONF_MODULE_push(supported_modules, tmod)) {
302			free(tmod);
303			return NULL;
304			}
305
306		2792	return tmod;
307		2792	}
308
309			/* Find a module from the list. We allow module names of the
310			* form modname.XXXX to just search for modname to allow the
311			* same module to be initialized more than once.
312			*/
313
314			static CONF_MODULE *
315			module_find(char *name)
316			{
317			CONF_MODULE *tmod;
318			int i, nchar;
319			char *p;
320
321			p = strrchr(name, '.');
322
323			if (p)
324			nchar = p - name;
325			else
326			nchar = strlen(name);
327
328			for (i = 0; i < sk_CONF_MODULE_num(supported_modules); i++) {
329			tmod = sk_CONF_MODULE_value(supported_modules, i);
330			if (!strncmp(tmod->name, name, nchar))
331			return tmod;
332			}
333
334			return NULL;
335			}
336
337			/* initialize a module */
338			static int
339			module_init(CONF_MODULE pmod, char name, char value, const CONF cnf)
340			{
341			int ret = 1;
342			int init_called = 0;
343			CONF_IMODULE *imod = NULL;
344
345			/* Otherwise add initialized module to list */
346			imod = malloc(sizeof(CONF_IMODULE));
347			if (!imod)
348			goto err;
349
350			imod->pmod = pmod;
351			imod->name = name ? strdup(name) : NULL;
352			imod->value = value ? strdup(value) : NULL;
353			imod->usr_data = NULL;
354
355			if (!imod->name \|\| !imod->value)
356			goto memerr;
357
358			/* Try to initialize module */
359			if (pmod->init) {
360			ret = pmod->init(imod, cnf);
361			init_called = 1;
362			/* Error occurred, exit */
363			if (ret <= 0)
364			goto err;
365			}
366
367			if (initialized_modules == NULL) {
368			initialized_modules = sk_CONF_IMODULE_new_null();
369			if (!initialized_modules) {
370			CONFerror(ERR_R_MALLOC_FAILURE);
371			goto err;
372			}
373			}
374
375			if (!sk_CONF_IMODULE_push(initialized_modules, imod)) {
376			CONFerror(ERR_R_MALLOC_FAILURE);
377			goto err;
378			}
379
380			pmod->links++;
381
382			return ret;
383
384			err:
385			/* We've started the module so we'd better finish it */
386			if (pmod->finish && init_called)
387			pmod->finish(imod);
388
389			memerr:
390			if (imod) {
391			free(imod->name);
392			free(imod->value);
393			free(imod);
394			}
395
396			return -1;
397			}
398
399			/* Unload any dynamic modules that have a link count of zero:
400			* i.e. have no active initialized modules. If 'all' is set
401			* then all modules are unloaded including static ones.
402			*/
403
404			void
405			CONF_modules_unload(int all)
406			{
407			int i;
408			CONF_MODULE *md;
409
410		2786	CONF_modules_finish();
411
412			/* unload modules in reverse order */
413	✓✓	8358	for (i = sk_CONF_MODULE_num(supported_modules) - 1; i >= 0; i--) {
414		2786	md = sk_CONF_MODULE_value(supported_modules, i);
415			/* If static or in use and 'all' not set ignore it */
416	✓✗✓✗ ✗✗	5572	if (((md->links > 0) \|\| !md->dso) && !all)
417			continue;
418			/* Since we're working in reverse this is OK */
419		2786	(void)sk_CONF_MODULE_delete(supported_modules, i);
420		2786	module_free(md);
421		2786	}
422	✓✗	1393	if (sk_CONF_MODULE_num(supported_modules) == 0) {
423		1393	sk_CONF_MODULE_free(supported_modules);
424		1393	supported_modules = NULL;
425		1393	}
426		1393	}
427
428			/* unload a single module */
429			static void
430			module_free(CONF_MODULE *md)
431			{
432	✗✓	5572	if (md->dso)
433			DSO_free(md->dso);
434		2786	free(md->name);
435		2786	free(md);
436		2786	}
437
438			/* finish and free up all modules instances */
439
440			void
441			CONF_modules_finish(void)
442			{
443			CONF_IMODULE *imod;
444
445	✗✓	4179	while (sk_CONF_IMODULE_num(initialized_modules) > 0) {
446			imod = sk_CONF_IMODULE_pop(initialized_modules);
447			module_finish(imod);
448			}
449		1393	sk_CONF_IMODULE_free(initialized_modules);
450		1393	initialized_modules = NULL;
451		1393	}
452
453			/* finish a module instance */
454
455			static void
456			module_finish(CONF_IMODULE *imod)
457			{
458			if (imod->pmod->finish)
459			imod->pmod->finish(imod);
460			imod->pmod->links--;
461			free(imod->name);
462			free(imod->value);
463			free(imod);
464			}
465
466			/* Add a static module to OpenSSL */
467
468			int
469			CONF_module_add(const char name, conf_init_func ifunc,
470			conf_finish_func *ffunc)
471			{
472	✓✗	5584	if (module_add(NULL, name, ifunc, ffunc))
473		2792	return 1;
474			else
475			return 0;
476		2792	}
477
478			void
479			CONF_modules_free(void)
480			{
481			CONF_modules_finish();
482			CONF_modules_unload(1);
483			}
484
485			/* Utility functions */
486
487			const char *
488			CONF_imodule_get_name(const CONF_IMODULE *md)
489			{
490			return md->name;
491			}
492
493			const char *
494			CONF_imodule_get_value(const CONF_IMODULE *md)
495			{
496			return md->value;
497			}
498
499			void *
500			CONF_imodule_get_usr_data(const CONF_IMODULE *md)
501			{
502			return md->usr_data;
503			}
504
505			void
506			CONF_imodule_set_usr_data(CONF_IMODULE md, void usr_data)
507			{
508			md->usr_data = usr_data;
509			}
510
511			CONF_MODULE *
512			CONF_imodule_get_module(const CONF_IMODULE *md)
513			{
514			return md->pmod;
515			}
516
517			unsigned long
518			CONF_imodule_get_flags(const CONF_IMODULE *md)
519			{
520			return md->flags;
521			}
522
523			void
524			CONF_imodule_set_flags(CONF_IMODULE *md, unsigned long flags)
525			{
526			md->flags = flags;
527			}
528
529			void *
530			CONF_module_get_usr_data(CONF_MODULE *pmod)
531			{
532			return pmod->usr_data;
533			}
534
535			void
536			CONF_module_set_usr_data(CONF_MODULE pmod, void usr_data)
537			{
538			pmod->usr_data = usr_data;
539			}
540
541			/* Return default config file name */
542
543			char *
544			CONF_get1_default_config_file(void)
545			{
546			char *file = NULL;
547
548			if (asprintf(&file, "%s/openssl.cnf",
549			X509_get_default_cert_area()) == -1)
550			return (NULL);
551			return file;
552			}
553
554			/* This function takes a list separated by 'sep' and calls the
555			* callback function giving the start and length of each member
556			* optionally stripping leading and trailing whitespace. This can
557			* be used to parse comma separated lists for example.
558			*/
559
560			int
561			CONF_parse_list(const char *list_, int sep, int nospc,
562			int (list_cb)(const char elem, int len, void usr), void arg)
563			{
564			int ret;
565			const char lstart, tmpend, *p;
566
567			if (list_ == NULL) {
568			CONFerror(CONF_R_LIST_CANNOT_BE_NULL);
569			return 0;
570			}
571
572			lstart = list_;
573			for (;;) {
574			if (nospc) {
575			while (lstart && isspace((unsigned char)lstart))
576			lstart++;
577			}
578			p = strchr(lstart, sep);
579			if (p == lstart \|\| !*lstart)
580			ret = list_cb(NULL, 0, arg);
581			else {
582			if (p)
583			tmpend = p - 1;
584			else
585			tmpend = lstart + strlen(lstart) - 1;
586			if (nospc) {
587			while (isspace((unsigned char)*tmpend))
588			tmpend--;
589			}
590			ret = list_cb(lstart, tmpend - lstart + 1, arg);
591			}
592			if (ret <= 0)
593			return ret;
594			if (p == NULL)
595			return 1;
596			lstart = p + 1;
597			}
598			}