diff options
Diffstat (limited to 'openssl-1.1.0h/crypto/conf/conf_mod.c')
| -rw-r--r-- | openssl-1.1.0h/crypto/conf/conf_mod.c | 549 |
1 files changed, 549 insertions, 0 deletions
diff --git a/openssl-1.1.0h/crypto/conf/conf_mod.c b/openssl-1.1.0h/crypto/conf/conf_mod.c new file mode 100644 index 0000000..543a8ea --- /dev/null +++ b/openssl-1.1.0h/crypto/conf/conf_mod.c @@ -0,0 +1,549 @@ +/* + * Copyright 2002-2016 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 <stdio.h> +#include <ctype.h> +#include <openssl/crypto.h> +#include "internal/cryptlib.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); + + 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; + tmod = OPENSSL_zalloc(sizeof(*tmod)); + if (tmod == NULL) + 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; + int len; + + file = getenv("OPENSSL_CONF"); + if (file) + return OPENSSL_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 == NULL) + return NULL; + OPENSSL_strlcpy(file, X509_get_default_cert_area(), len + 1); +#ifndef OPENSSL_SYS_VMS + OPENSSL_strlcat(file, "/", len + 1); +#endif + OPENSSL_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; + } +} |