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4a3e6bce79
to the list using dynamic_path. This stops ENGINEs which don't supply any default algorithms being automatically freed (because they have no references) and allows them to be accessed by id. Alternative dynamic loading behaviour can be achieved by issuing the dynamic ENGINE ctrls separately in the config file.
195 lines
5.6 KiB
C
195 lines
5.6 KiB
C
/* eng_cnf.c */
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/* Written by Stephen Henson (shenson@bigfoot.com) for the OpenSSL
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* project 2001.
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*/
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/* ====================================================================
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* Copyright (c) 2001 The OpenSSL Project. All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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*
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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*
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in
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* the documentation and/or other materials provided with the
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* distribution.
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*
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* 3. All advertising materials mentioning features or use of this
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* software must display the following acknowledgment:
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* "This product includes software developed by the OpenSSL Project
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* for use in the OpenSSL Toolkit. (http://www.OpenSSL.org/)"
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*
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* 4. The names "OpenSSL Toolkit" and "OpenSSL Project" must not be used to
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* endorse or promote products derived from this software without
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* prior written permission. For written permission, please contact
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* licensing@OpenSSL.org.
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*
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* 5. Products derived from this software may not be called "OpenSSL"
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* nor may "OpenSSL" appear in their names without prior written
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* permission of the OpenSSL Project.
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*
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* 6. Redistributions of any form whatsoever must retain the following
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* acknowledgment:
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* "This product includes software developed by the OpenSSL Project
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* for use in the OpenSSL Toolkit (http://www.OpenSSL.org/)"
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*
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* THIS SOFTWARE IS PROVIDED BY THE OpenSSL PROJECT ``AS IS'' AND ANY
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* EXPRESSED OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
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* PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE OpenSSL PROJECT OR
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* ITS CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
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* SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
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* NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
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* LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
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* STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
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* ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED
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* OF THE POSSIBILITY OF SUCH DAMAGE.
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* ====================================================================
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*
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* This product includes cryptographic software written by Eric Young
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* (eay@cryptsoft.com). This product includes software written by Tim
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* Hudson (tjh@cryptsoft.com).
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*
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*/
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#include <stdio.h>
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#include <openssl/crypto.h>
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#include "cryptlib.h"
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#include <openssl/conf.h>
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#include <openssl/engine.h>
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/* #define ENGINE_CONF_DEBUG */
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/* ENGINE config module */
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static char *skip_dot(char *name)
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{
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char *p;
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p = strchr(name, '.');
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if (p)
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return p + 1;
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return name;
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}
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int int_engine_configure(char *name, char *value, const CONF *cnf)
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{
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int i;
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int ret = 0;
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STACK_OF(CONF_VALUE) *ecmds;
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CONF_VALUE *ecmd;
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char *ctrlname, *ctrlvalue;
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ENGINE *e = NULL;
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name = skip_dot(name);
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#ifdef ENGINE_CONF_DEBUG
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fprintf(stderr, "Configuring engine %s\n", name);
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#endif
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/* Value is a section containing ENGINE commands */
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ecmds = NCONF_get_section(cnf, value);
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if (!ecmds)
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{
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ENGINEerr(ENGINE_F_INT_ENGINE_CONFIGURE, ENGINE_R_ENGINE_SECTION_ERROR);
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return 0;
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}
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for (i = 0; i < sk_CONF_VALUE_num(ecmds); i++)
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{
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ecmd = sk_CONF_VALUE_value(ecmds, i);
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ctrlname = skip_dot(ecmd->name);
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ctrlvalue = ecmd->value;
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#ifdef ENGINE_CONF_DEBUG
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fprintf(stderr, "ENGINE conf: doing ctrl(%s,%s)\n", ctrlname, ctrlvalue);
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#endif
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/* First handle some special pseudo ctrls */
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/* Override engine name to use */
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if (!strcmp(ctrlname, "engine_id"))
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name = ctrlvalue;
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/* Load a dynamic ENGINE */
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else if (!strcmp(ctrlname, "dynamic_path"))
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{
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e = ENGINE_by_id("dynamic");
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if (!e)
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goto err;
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if (!ENGINE_ctrl_cmd_string(e, "SO_PATH", ctrlvalue, 0))
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goto err;
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if (!ENGINE_ctrl_cmd_string(e, "LIST_ADD", "2", 0))
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goto err;
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if (!ENGINE_ctrl_cmd_string(e, "LOAD", NULL, 0))
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goto err;
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}
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/* ... add other pseudos here ... */
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else
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{
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/* At this point we need an ENGINE structural reference
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* if we don't already have one.
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*/
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if (!e)
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{
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e = ENGINE_by_id(name);
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if (!e)
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return 0;
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}
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/* Allow "EMPTY" to mean no value: this allows a valid
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* "value" to be passed to ctrls of type NO_INPUT
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*/
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if (!strcmp(ctrlvalue, "EMPTY"))
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ctrlvalue = NULL;
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if (!strcmp(ctrlname, "default_algorithms"))
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{
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if (!ENGINE_set_default_string(e, ctrlvalue))
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goto err;
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}
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else if (!ENGINE_ctrl_cmd_string(e,
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ctrlname, ctrlvalue, 0))
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return 0;
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}
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}
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ret = 1;
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err:
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if (e)
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ENGINE_free(e);
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return ret;
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}
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static int int_engine_module_init(CONF_IMODULE *md, const CONF *cnf)
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{
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STACK_OF(CONF_VALUE) *elist;
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CONF_VALUE *cval;
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int i;
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#ifdef ENGINE_CONF_DEBUG
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fprintf(stderr, "Called engine module: name %s, value %s\n",
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CONF_imodule_get_name(md), CONF_imodule_get_value(md));
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#endif
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/* Value is a section containing ENGINEs to configure */
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elist = NCONF_get_section(cnf, CONF_imodule_get_value(md));
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if (!elist)
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{
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ENGINEerr(ENGINE_F_ENGINE_MODULE_INIT, ENGINE_R_ENGINES_SECTION_ERROR);
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return 0;
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}
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for (i = 0; i < sk_CONF_VALUE_num(elist); i++)
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{
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cval = sk_CONF_VALUE_value(elist, i);
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if (!int_engine_configure(cval->name, cval->value, cnf))
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return 0;
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}
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return 1;
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}
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void ENGINE_add_conf_module(void)
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{
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CONF_module_add("engines", int_engine_module_init, 0);
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}
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