Restoring authorship annotation for <deshevoy@yandex-team.ru>. Commit 1 of 2.

1 files changed, 551 insertions, 551 deletions

diff --git a/contrib/libs/openssl/crypto/conf/conf_mod.c b/contrib/libs/openssl/crypto/conf/conf_mod.c
index e703d97f54..3690657a1f 100644
--- a/contrib/libs/openssl/crypto/conf/conf_mod.c
+++ b/contrib/libs/openssl/crypto/conf/conf_mod.c
@@ -1,551 +1,551 @@
-/*
- * Copyright 2002-2019 The OpenSSL Project Authors. All Rights Reserved.
- *
- * Licensed under the OpenSSL license (the "License").  You may not use
- * this file except in compliance with the License.  You can obtain a copy
- * in the file LICENSE in the source distribution or at
- * https://www.openssl.org/source/license.html
- */
-
-#include "internal/cryptlib.h"
-#include <stdio.h>
-#include <ctype.h>
-#include <openssl/crypto.h>
-#include "internal/conf.h"
-#include "internal/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, const char *name, const 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(const char *name);
-static int module_init(CONF_MODULE *pmod, const char *name, const char *value,
-                       const CONF *cnf);
-static CONF_MODULE *module_load_dso(const CONF *cnf, const char *name,
-                                    const char *value);
-
-/* 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 == NULL)
-        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);
-
-    if (flags & CONF_MFLAGS_IGNORE_RETURN_CODES)
-        return 1;
-
-    return ret;
-}
-
-static int module_run(const CONF *cnf, const char *name, const 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);
-
-    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,
-                                    const char *name, const char *value)
-{
-    DSO *dso = NULL;
-    conf_init_func *ifunc;
-    conf_finish_func *ffunc;
-    const 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:
-    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;
-    if ((tmod = OPENSSL_zalloc(sizeof(*tmod))) == NULL) {
-        CONFerr(CONF_F_MODULE_ADD, ERR_R_MALLOC_FAILURE);
-        return NULL;
-    }
-
-    tmod->dso = dso;
-    tmod->name = OPENSSL_strdup(name);
-    tmod->init = ifunc;
-    tmod->finish = ffunc;
-    if (tmod->name == NULL) {
-        OPENSSL_free(tmod);
-        return NULL;
-    }
-
-    if (!sk_CONF_MODULE_push(supported_modules, tmod)) {
-        OPENSSL_free(tmod->name);
-        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(const 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) == 0)
-            return tmod;
-    }
-
-    return NULL;
-
-}
-
-/* initialize a module */
-static int module_init(CONF_MODULE *pmod, const char *name, const 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(*imod));
-    if (imod == NULL)
-        goto err;
-
-    imod->pmod = pmod;
-    imod->name = OPENSSL_strdup(name);
-    imod->value = OPENSSL_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) {
-        OPENSSL_free(imod->name);
-        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)
-{
-    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)
-        return;
-    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_int(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, *sep = "";
-    int len;
-
-    if ((file = ossl_safe_getenv("OPENSSL_CONF")) != NULL)
-        return OPENSSL_strdup(file);
-
-    len = strlen(X509_get_default_cert_area());
-#ifndef OPENSSL_SYS_VMS
-    len++;
-    sep = "/";
-#endif
-    len += strlen(OPENSSL_CONF);
-
-    file = OPENSSL_malloc(len + 1);
-
-    if (file == NULL)
-        return NULL;
-    BIO_snprintf(file, len + 1, "%s%s%s", X509_get_default_cert_area(),
-                 sep, OPENSSL_CONF);
-
-    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;
-    }
-}
+/* 
+ * Copyright 2002-2019 The OpenSSL Project Authors. All Rights Reserved. 
+ * 
+ * Licensed under the OpenSSL license (the "License").  You may not use 
+ * this file except in compliance with the License.  You can obtain a copy 
+ * in the file LICENSE in the source distribution or at 
+ * https://www.openssl.org/source/license.html 
+ */ 
+ 
+#include "internal/cryptlib.h" 
+#include <stdio.h> 
+#include <ctype.h> 
+#include <openssl/crypto.h> 
+#include "internal/conf.h" 
+#include "internal/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, const char *name, const 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(const char *name); 
+static int module_init(CONF_MODULE *pmod, const char *name, const char *value, 
+                       const CONF *cnf); 
+static CONF_MODULE *module_load_dso(const CONF *cnf, const char *name, 
+                                    const char *value); 
+ 
+/* 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 == NULL) 
+        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); 
+ 
+    if (flags & CONF_MFLAGS_IGNORE_RETURN_CODES) 
+        return 1; 
+ 
+    return ret; 
+} 
+ 
+static int module_run(const CONF *cnf, const char *name, const 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); 
+ 
+    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, 
+                                    const char *name, const char *value) 
+{ 
+    DSO *dso = NULL; 
+    conf_init_func *ifunc; 
+    conf_finish_func *ffunc; 
+    const 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: 
+    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; 
+    if ((tmod = OPENSSL_zalloc(sizeof(*tmod))) == NULL) { 
+        CONFerr(CONF_F_MODULE_ADD, ERR_R_MALLOC_FAILURE); 
+        return NULL; 
+    } 
+ 
+    tmod->dso = dso; 
+    tmod->name = OPENSSL_strdup(name); 
+    tmod->init = ifunc; 
+    tmod->finish = ffunc; 
+    if (tmod->name == NULL) { 
+        OPENSSL_free(tmod); 
+        return NULL; 
+    } 
+ 
+    if (!sk_CONF_MODULE_push(supported_modules, tmod)) { 
+        OPENSSL_free(tmod->name); 
+        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(const 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) == 0) 
+            return tmod; 
+    } 
+ 
+    return NULL; 
+ 
+} 
+ 
+/* initialize a module */ 
+static int module_init(CONF_MODULE *pmod, const char *name, const 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(*imod)); 
+    if (imod == NULL) 
+        goto err; 
+ 
+    imod->pmod = pmod; 
+    imod->name = OPENSSL_strdup(name); 
+    imod->value = OPENSSL_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) { 
+        OPENSSL_free(imod->name); 
+        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) 
+{ 
+    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) 
+        return; 
+    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_int(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, *sep = ""; 
+    int len; 
+ 
+    if ((file = ossl_safe_getenv("OPENSSL_CONF")) != NULL) 
+        return OPENSSL_strdup(file); 
+ 
+    len = strlen(X509_get_default_cert_area()); 
+#ifndef OPENSSL_SYS_VMS 
+    len++; 
+    sep = "/"; 
+#endif 
+    len += strlen(OPENSSL_CONF); 
+ 
+    file = OPENSSL_malloc(len + 1); 
+ 
+    if (file == NULL) 
+        return NULL; 
+    BIO_snprintf(file, len + 1, "%s%s%s", X509_get_default_cert_area(), 
+                 sep, OPENSSL_CONF); 
+ 
+    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; 
+    } 
+}