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/*
* Copyright 2002-2020 The OpenSSL Project Authors. All Rights Reserved.
*
* Licensed under the Apache License 2.0 (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 "eng_local.h"
#include <openssl/conf.h>
#include <openssl/trace.h>
DEFINE_STACK_OF(CONF_VALUE)
/* ENGINE config module */
static const char *skip_dot(const char *name)
{
const char *p = strchr(name, '.');
if (p != NULL)
return p + 1;
return name;
}
static STACK_OF(ENGINE) *initialized_engines = NULL;
static int int_engine_init(ENGINE *e)
{
if (!ENGINE_init(e))
return 0;
if (!initialized_engines)
initialized_engines = sk_ENGINE_new_null();
if (!initialized_engines || !sk_ENGINE_push(initialized_engines, e)) {
ENGINE_finish(e);
return 0;
}
return 1;
}
static int int_engine_configure(const char *name, const char *value, const CONF *cnf)
{
int i;
int ret = 0;
long do_init = -1;
STACK_OF(CONF_VALUE) *ecmds;
CONF_VALUE *ecmd = NULL;
const char *ctrlname, *ctrlvalue;
ENGINE *e = NULL;
int soft = 0;
name = skip_dot(name);
OSSL_TRACE1(CONF, "Configuring engine %s\n", name);
/* Value is a section containing ENGINE commands */
ecmds = NCONF_get_section(cnf, value);
if (!ecmds) {
ENGINEerr(ENGINE_F_INT_ENGINE_CONFIGURE,
ENGINE_R_ENGINE_SECTION_ERROR);
return 0;
}
for (i = 0; i < sk_CONF_VALUE_num(ecmds); i++) {
ecmd = sk_CONF_VALUE_value(ecmds, i);
ctrlname = skip_dot(ecmd->name);
ctrlvalue = ecmd->value;
OSSL_TRACE2(CONF, "ENGINE: doing ctrl(%s,%s)\n",
ctrlname, ctrlvalue);
/* First handle some special pseudo ctrls */
/* Override engine name to use */
if (strcmp(ctrlname, "engine_id") == 0)
name = ctrlvalue;
else if (strcmp(ctrlname, "soft_load") == 0)
soft = 1;
/* Load a dynamic ENGINE */
else if (strcmp(ctrlname, "dynamic_path") == 0) {
e = ENGINE_by_id("dynamic");
if (!e)
goto err;
if (!ENGINE_ctrl_cmd_string(e, "SO_PATH", ctrlvalue, 0))
goto err;
if (!ENGINE_ctrl_cmd_string(e, "LIST_ADD", "2", 0))
goto err;
if (!ENGINE_ctrl_cmd_string(e, "LOAD", NULL, 0))
goto err;
}
/* ... add other pseudos here ... */
else {
/*
* At this point we need an ENGINE structural reference if we
* don't already have one.
*/
if (!e) {
e = ENGINE_by_id(name);
if (!e && soft) {
ERR_clear_error();
return 1;
}
if (!e)
goto err;
}
/*
* Allow "EMPTY" to mean no value: this allows a valid "value" to
* be passed to ctrls of type NO_INPUT
*/
if (strcmp(ctrlvalue, "EMPTY") == 0)
ctrlvalue = NULL;
if (strcmp(ctrlname, "init") == 0) {
if (!NCONF_get_number_e(cnf, value, "init", &do_init))
goto err;
if (do_init == 1) {
if (!int_engine_init(e))
goto err;
} else if (do_init != 0) {
ENGINEerr(ENGINE_F_INT_ENGINE_CONFIGURE,
ENGINE_R_INVALID_INIT_VALUE);
goto err;
}
} else if (strcmp(ctrlname, "default_algorithms") == 0) {
if (!ENGINE_set_default_string(e, ctrlvalue))
goto err;
} else if (!ENGINE_ctrl_cmd_string(e, ctrlname, ctrlvalue, 0))
goto err;
}
}
if (e && (do_init == -1) && !int_engine_init(e)) {
ecmd = NULL;
goto err;
}
ret = 1;
err:
if (ret != 1) {
ENGINEerr(ENGINE_F_INT_ENGINE_CONFIGURE,
ENGINE_R_ENGINE_CONFIGURATION_ERROR);
if (ecmd)
ERR_add_error_data(6, "section=", ecmd->section,
", name=", ecmd->name,
", value=", ecmd->value);
}
ENGINE_free(e);
return ret;
}
static int int_engine_module_init(CONF_IMODULE *md, const CONF *cnf)
{
STACK_OF(CONF_VALUE) *elist;
CONF_VALUE *cval;
int i;
OSSL_TRACE2(CONF, "Called engine module: name %s, value %s\n",
CONF_imodule_get_name(md), CONF_imodule_get_value(md));
/* Value is a section containing ENGINEs to configure */
elist = NCONF_get_section(cnf, CONF_imodule_get_value(md));
if (!elist) {
ENGINEerr(ENGINE_F_INT_ENGINE_MODULE_INIT,
ENGINE_R_ENGINES_SECTION_ERROR);
return 0;
}
for (i = 0; i < sk_CONF_VALUE_num(elist); i++) {
cval = sk_CONF_VALUE_value(elist, i);
if (!int_engine_configure(cval->name, cval->value, cnf))
return 0;
}
return 1;
}
static void int_engine_module_finish(CONF_IMODULE *md)
{
ENGINE *e;
while ((e = sk_ENGINE_pop(initialized_engines)))
ENGINE_finish(e);
sk_ENGINE_free(initialized_engines);
initialized_engines = NULL;
}
void ENGINE_add_conf_module(void)
{
CONF_module_add("engines",
int_engine_module_init, int_engine_module_finish);
}
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