eng_cnf.c
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上传日期:2020-08-09
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- /* eng_cnf.c */
- /* Written by Stephen Henson (shenson@bigfoot.com) 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 "eng_int.h"
- #include <openssl/conf.h>
- /* #define ENGINE_CONF_DEBUG */
- /* ENGINE config module */
- static char *skip_dot(char *name)
- {
- char *p;
- p = strchr(name, '.');
- if (p)
- return p + 1;
- return name;
- }
- static STACK_OF(ENGINE) *initialized_engines = NULL;
- static int int_engine_init(ENGINE *e)
- {
- if (!ENGINE_init(e))
- return 0;
- if (!initialized_engines)
- initialized_engines = sk_ENGINE_new_null();
- if (!initialized_engines || !sk_ENGINE_push(initialized_engines, e))
- {
- ENGINE_finish(e);
- return 0;
- }
- return 1;
- }
-
- static int int_engine_configure(char *name, char *value, const CONF *cnf)
- {
- int i;
- int ret = 0;
- long do_init = -1;
- STACK_OF(CONF_VALUE) *ecmds;
- CONF_VALUE *ecmd;
- char *ctrlname, *ctrlvalue;
- ENGINE *e = NULL;
- name = skip_dot(name);
- #ifdef ENGINE_CONF_DEBUG
- fprintf(stderr, "Configuring engine %sn", name);
- #endif
- /* Value is a section containing ENGINE commands */
- ecmds = NCONF_get_section(cnf, value);
- if (!ecmds)
- {
- ENGINEerr(ENGINE_F_INT_ENGINE_CONFIGURE, ENGINE_R_ENGINE_SECTION_ERROR);
- return 0;
- }
- for (i = 0; i < sk_CONF_VALUE_num(ecmds); i++)
- {
- ecmd = sk_CONF_VALUE_value(ecmds, i);
- ctrlname = skip_dot(ecmd->name);
- ctrlvalue = ecmd->value;
- #ifdef ENGINE_CONF_DEBUG
- fprintf(stderr, "ENGINE conf: doing ctrl(%s,%s)n", ctrlname, ctrlvalue);
- #endif
- /* First handle some special pseudo ctrls */
- /* Override engine name to use */
- if (!strcmp(ctrlname, "engine_id"))
- name = ctrlvalue;
- /* Load a dynamic ENGINE */
- else if (!strcmp(ctrlname, "dynamic_path"))
- {
- e = ENGINE_by_id("dynamic");
- if (!e)
- goto err;
- if (!ENGINE_ctrl_cmd_string(e, "SO_PATH", ctrlvalue, 0))
- goto err;
- if (!ENGINE_ctrl_cmd_string(e, "LIST_ADD", "2", 0))
- goto err;
- if (!ENGINE_ctrl_cmd_string(e, "LOAD", NULL, 0))
- goto err;
- }
- /* ... add other pseudos here ... */
- else
- {
- /* At this point we need an ENGINE structural reference
- * if we don't already have one.
- */
- if (!e)
- {
- e = ENGINE_by_id(name);
- if (!e)
- return 0;
- }
- /* Allow "EMPTY" to mean no value: this allows a valid
- * "value" to be passed to ctrls of type NO_INPUT
- */
- if (!strcmp(ctrlvalue, "EMPTY"))
- ctrlvalue = NULL;
- if (!strcmp(ctrlname, "init"))
- {
- if (!NCONF_get_number_e(cnf, value, "init", &do_init))
- goto err;
- if (do_init == 1)
- {
- if (!int_engine_init(e))
- goto err;
- }
- else if (do_init != 0)
- {
- ENGINEerr(ENGINE_F_INT_ENGINE_CONFIGURE, ENGINE_R_INVALID_INIT_VALUE);
- goto err;
- }
- }
- else if (!strcmp(ctrlname, "default_algorithms"))
- {
- if (!ENGINE_set_default_string(e, ctrlvalue))
- goto err;
- }
- else if (!ENGINE_ctrl_cmd_string(e,
- ctrlname, ctrlvalue, 0))
- return 0;
- }
- }
- if (e && (do_init == -1) && !int_engine_init(e))
- goto err;
- ret = 1;
- err:
- if (e)
- ENGINE_free(e);
- return ret;
- }
- static int int_engine_module_init(CONF_IMODULE *md, const CONF *cnf)
- {
- STACK_OF(CONF_VALUE) *elist;
- CONF_VALUE *cval;
- int i;
- #ifdef ENGINE_CONF_DEBUG
- fprintf(stderr, "Called engine module: name %s, value %sn",
- CONF_imodule_get_name(md), CONF_imodule_get_value(md));
- #endif
- /* Value is a section containing ENGINEs to configure */
- elist = NCONF_get_section(cnf, CONF_imodule_get_value(md));
- if (!elist)
- {
- ENGINEerr(ENGINE_F_INT_ENGINE_MODULE_INIT, ENGINE_R_ENGINES_SECTION_ERROR);
- return 0;
- }
- for (i = 0; i < sk_CONF_VALUE_num(elist); i++)
- {
- cval = sk_CONF_VALUE_value(elist, i);
- if (!int_engine_configure(cval->name, cval->value, cnf))
- return 0;
- }
- return 1;
- }
- static void int_engine_module_finish(CONF_IMODULE *md)
- {
- ENGINE *e;
- while ((e = sk_ENGINE_pop(initialized_engines)))
- ENGINE_finish(e);
- sk_ENGINE_free(initialized_engines);
- initialized_engines = NULL;
- }
-
- void ENGINE_add_conf_module(void)
- {
- CONF_module_add("engines",
- int_engine_module_init,
- int_engine_module_finish);
- }