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623 lines
14 KiB
623 lines
14 KiB
/* conf_mod.c */
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/* Written by Stephen Henson (steve@openssl.org) 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 <ctype.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/dso.h>
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#include <openssl/x509.h>
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#define DSO_mod_init_name "OPENSSL_init"
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#define DSO_mod_finish_name "OPENSSL_finish"
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/* This structure contains a data about supported modules.
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* entries in this table correspond to either dynamic or
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* static modules.
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*/
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struct conf_module_st
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{
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/* DSO of this module or NULL if static */
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DSO *dso;
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/* Name of the module */
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char *name;
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/* Init function */
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conf_init_func *init;
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/* Finish function */
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conf_finish_func *finish;
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/* Number of successfully initialized modules */
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int links;
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void *usr_data;
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};
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/* This structure contains information about modules that have been
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* successfully initialized. There may be more than one entry for a
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* given module.
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*/
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struct conf_imodule_st
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{
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CONF_MODULE *pmod;
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char *name;
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char *value;
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unsigned long flags;
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void *usr_data;
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};
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static STACK_OF(CONF_MODULE) *supported_modules = NULL;
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static STACK_OF(CONF_IMODULE) *initialized_modules = NULL;
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static void module_free(CONF_MODULE *md);
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static void module_finish(CONF_IMODULE *imod);
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static int module_run(const CONF *cnf, char *name, char *value,
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unsigned long flags);
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static CONF_MODULE *module_add(DSO *dso, const char *name,
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conf_init_func *ifunc, conf_finish_func *ffunc);
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static CONF_MODULE *module_find(char *name);
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static int module_init(CONF_MODULE *pmod, char *name, char *value,
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const CONF *cnf);
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static CONF_MODULE *module_load_dso(const CONF *cnf, char *name, char *value,
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unsigned long flags);
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/* Main function: load modules from a CONF structure */
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int CONF_modules_load(const CONF *cnf, const char *appname,
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unsigned long flags)
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{
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STACK_OF(CONF_VALUE) *values;
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CONF_VALUE *vl;
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char *vsection = NULL;
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int ret, i;
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if (!cnf)
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return 1;
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if (appname)
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vsection = NCONF_get_string(cnf, NULL, appname);
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if (!appname || (!vsection && (flags & CONF_MFLAGS_DEFAULT_SECTION)))
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vsection = NCONF_get_string(cnf, NULL, "openssl_conf");
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if (!vsection)
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{
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ERR_clear_error();
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return 1;
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}
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values = NCONF_get_section(cnf, vsection);
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if (!values)
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return 0;
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for (i = 0; i < sk_CONF_VALUE_num(values); i++)
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{
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vl = sk_CONF_VALUE_value(values, i);
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ret = module_run(cnf, vl->name, vl->value, flags);
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if (ret <= 0)
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if(!(flags & CONF_MFLAGS_IGNORE_ERRORS))
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return ret;
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}
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return 1;
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}
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int CONF_modules_load_file(const char *filename, const char *appname,
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unsigned long flags)
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{
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char *file = NULL;
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CONF *conf = NULL;
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int ret = 0;
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conf = NCONF_new(NULL);
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if (!conf)
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goto err;
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if (filename == NULL)
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{
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file = CONF_get1_default_config_file();
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if (!file)
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goto err;
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}
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else
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file = (char *)filename;
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if (NCONF_load(conf, file, NULL) <= 0)
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{
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if ((flags & CONF_MFLAGS_IGNORE_MISSING_FILE) &&
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(ERR_GET_REASON(ERR_peek_last_error()) == CONF_R_NO_SUCH_FILE))
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{
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ERR_clear_error();
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ret = 1;
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}
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goto err;
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}
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ret = CONF_modules_load(conf, appname, flags);
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err:
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if (filename == NULL)
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OPENSSL_free(file);
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NCONF_free(conf);
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return ret;
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}
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static int module_run(const CONF *cnf, char *name, char *value,
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unsigned long flags)
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{
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CONF_MODULE *md;
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int ret;
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md = module_find(name);
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/* Module not found: try to load DSO */
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if (!md && !(flags & CONF_MFLAGS_NO_DSO))
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md = module_load_dso(cnf, name, value, flags);
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if (!md)
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{
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if (!(flags & CONF_MFLAGS_SILENT))
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{
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CONFerr(CONF_F_MODULE_RUN, CONF_R_UNKNOWN_MODULE_NAME);
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ERR_add_error_data(2, "module=", name);
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}
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return -1;
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}
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ret = module_init(md, name, value, cnf);
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if (ret <= 0)
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{
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if (!(flags & CONF_MFLAGS_SILENT))
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{
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char rcode[DECIMAL_SIZE(ret)+1];
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CONFerr(CONF_F_MODULE_RUN, CONF_R_MODULE_INITIALIZATION_ERROR);
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BIO_snprintf(rcode, sizeof rcode, "%-8d", ret);
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ERR_add_error_data(6, "module=", name, ", value=", value, ", retcode=", rcode);
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}
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}
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return ret;
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}
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/* Load a module from a DSO */
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static CONF_MODULE *module_load_dso(const CONF *cnf, char *name, char *value,
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unsigned long flags)
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{
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DSO *dso = NULL;
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conf_init_func *ifunc;
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conf_finish_func *ffunc;
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char *path = NULL;
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int errcode = 0;
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CONF_MODULE *md;
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/* Look for alternative path in module section */
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path = NCONF_get_string(cnf, value, "path");
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if (!path)
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{
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ERR_clear_error();
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path = name;
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}
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dso = DSO_load(NULL, path, NULL, 0);
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if (!dso)
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{
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errcode = CONF_R_ERROR_LOADING_DSO;
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goto err;
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}
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ifunc = (conf_init_func *)DSO_bind_func(dso, DSO_mod_init_name);
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if (!ifunc)
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{
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errcode = CONF_R_MISSING_INIT_FUNCTION;
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goto err;
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}
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ffunc = (conf_finish_func *)DSO_bind_func(dso, DSO_mod_finish_name);
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/* All OK, add module */
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md = module_add(dso, name, ifunc, ffunc);
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if (!md)
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goto err;
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return md;
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err:
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if (dso)
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DSO_free(dso);
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CONFerr(CONF_F_MODULE_LOAD_DSO, errcode);
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ERR_add_error_data(4, "module=", name, ", path=", path);
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return NULL;
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}
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|
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/* add module to list */
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static CONF_MODULE *module_add(DSO *dso, const char *name,
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conf_init_func *ifunc, conf_finish_func *ffunc)
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{
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CONF_MODULE *tmod = NULL;
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if (supported_modules == NULL)
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supported_modules = sk_CONF_MODULE_new_null();
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if (supported_modules == NULL)
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return NULL;
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tmod = OPENSSL_malloc(sizeof(CONF_MODULE));
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if (tmod == NULL)
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return NULL;
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tmod->dso = dso;
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tmod->name = BUF_strdup(name);
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tmod->init = ifunc;
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tmod->finish = ffunc;
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tmod->links = 0;
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|
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if (!sk_CONF_MODULE_push(supported_modules, tmod))
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{
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OPENSSL_free(tmod);
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return NULL;
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}
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return tmod;
|
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}
|
|
|
|
/* Find a module from the list. We allow module names of the
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* form modname.XXXX to just search for modname to allow the
|
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* same module to be initialized more than once.
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*/
|
|
|
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static CONF_MODULE *module_find(char *name)
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{
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CONF_MODULE *tmod;
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int i, nchar;
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char *p;
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p = strrchr(name, '.');
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if (p)
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nchar = p - name;
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else
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nchar = strlen(name);
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|
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for (i = 0; i < sk_CONF_MODULE_num(supported_modules); i++)
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{
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tmod = sk_CONF_MODULE_value(supported_modules, i);
|
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if (!strncmp(tmod->name, name, nchar))
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|
return tmod;
|
|
}
|
|
|
|
return NULL;
|
|
|
|
}
|
|
|
|
/* initialize a module */
|
|
static int module_init(CONF_MODULE *pmod, char *name, char *value,
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const CONF *cnf)
|
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{
|
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int ret = 1;
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int init_called = 0;
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CONF_IMODULE *imod = NULL;
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|
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/* Otherwise add initialized module to list */
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imod = OPENSSL_malloc(sizeof(CONF_IMODULE));
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if (!imod)
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goto err;
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|
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imod->pmod = pmod;
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imod->name = BUF_strdup(name);
|
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imod->value = BUF_strdup(value);
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imod->usr_data = NULL;
|
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|
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if (!imod->name || !imod->value)
|
|
goto memerr;
|
|
|
|
/* Try to initialize module */
|
|
if(pmod->init)
|
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{
|
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ret = pmod->init(imod, cnf);
|
|
init_called = 1;
|
|
/* Error occurred, exit */
|
|
if (ret <= 0)
|
|
goto err;
|
|
}
|
|
|
|
if (initialized_modules == NULL)
|
|
{
|
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initialized_modules = sk_CONF_IMODULE_new_null();
|
|
if (!initialized_modules)
|
|
{
|
|
CONFerr(CONF_F_MODULE_INIT, ERR_R_MALLOC_FAILURE);
|
|
goto err;
|
|
}
|
|
}
|
|
|
|
if (!sk_CONF_IMODULE_push(initialized_modules, imod))
|
|
{
|
|
CONFerr(CONF_F_MODULE_INIT, 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)
|
|
{
|
|
if (imod->name)
|
|
OPENSSL_free(imod->name);
|
|
if (imod->value)
|
|
OPENSSL_free(imod->value);
|
|
OPENSSL_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);
|
|
OPENSSL_free(md->name);
|
|
OPENSSL_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--;
|
|
OPENSSL_free(imod->name);
|
|
OPENSSL_free(imod->value);
|
|
OPENSSL_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;
|
|
int len;
|
|
|
|
file = getenv("OPENSSL_CONF");
|
|
if (file)
|
|
return BUF_strdup(file);
|
|
|
|
len = strlen(X509_get_default_cert_area());
|
|
#ifndef OPENSSL_SYS_VMS
|
|
len++;
|
|
#endif
|
|
len += strlen(OPENSSL_CONF);
|
|
|
|
file = OPENSSL_malloc(len + 1);
|
|
|
|
if (!file)
|
|
return NULL;
|
|
BUF_strlcpy(file,X509_get_default_cert_area(),len + 1);
|
|
#ifndef OPENSSL_SYS_VMS
|
|
BUF_strlcat(file,"/",len + 1);
|
|
#endif
|
|
BUF_strlcat(file,OPENSSL_CONF,len + 1);
|
|
|
|
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)
|
|
{
|
|
CONFerr(CONF_F_CONF_PARSE_LIST, 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;
|
|
}
|
|
}
|
|
|
|
|