--- /dev/null
+/* conf_mod.c */
+/* 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 <stdio.h>
+#include <ctype.h>
+#include <openssl/crypto.h>
+#include "cryptlib.h"
+#include <openssl/conf.h>
+#include <openssl/dso.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)
+ OPENSSL_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))
+ {
+ CONFerr(CONF_F_MODULE_RUN, CONF_R_UNKNOWN_MODULE_NAME);
+ ERR_add_error_data(2, "module=", name);
+ }
+ return -1;
+ }
+
+ ret = module_init(md, name, value, cnf);
+
+ if (ret <= 0)
+ {
+ if (!(flags & CONF_MFLAGS_SILENT))
+ {
+ char rcode[DECIMAL_SIZE(ret)+1];
+ CONFerr(CONF_F_MODULE_RUN, CONF_R_MODULE_INITIALIZATION_ERROR);
+ BIO_snprintf(rcode, sizeof rcode, "%-8d", ret);
+ ERR_add_error_data(6, "module=", name, ", value=", value, ", retcode=", rcode);
+ }
+ }
+
+ 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);
+ CONFerr(CONF_F_MODULE_LOAD_DSO, errcode);
+ ERR_add_error_data(4, "module=", name, ", path=", 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 (supported_modules == NULL)
+ supported_modules = sk_CONF_MODULE_new_null();
+ if (supported_modules == NULL)
+ return NULL;
+ tmod = OPENSSL_malloc(sizeof(CONF_MODULE));
+ if (tmod == NULL)
+ return NULL;
+
+ tmod->dso = dso;
+ tmod->name = BUF_strdup(name);
+ tmod->init = ifunc;
+ tmod->finish = ffunc;
+ tmod->links = 0;
+
+ if (!sk_CONF_MODULE_push(supported_modules, tmod))
+ {
+ OPENSSL_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 = OPENSSL_malloc(sizeof(CONF_IMODULE));
+ if (!imod)
+ goto err;
+
+ imod->pmod = pmod;
+ imod->name = BUF_strdup(name);
+ imod->value = BUF_strdup(value);
+ 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)
+ {
+ 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;
+ }
+ }
+
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