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/*
* Copyright 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
*/
/*
* Here is a set of wrappers for the ENGINE API, which are no-ops when the
* ENGINE API is disabled / removed.
* We need to suppress deprecation warnings to make this work.
*/
#define OPENSSL_SUPPRESS_DEPRECATED
#include <string.h> /* strcmp */
#include <openssl/types.h> /* Ensure we have the ENGINE type, regardless */
#ifndef OPENSSL_NO_ENGINE
# include <openssl/engine.h>
#endif
#include "apps.h"
#ifndef OPENSSL_NO_ENGINE
/* Try to load an engine in a shareable library */
static ENGINE *try_load_engine(const char *engine)
{
ENGINE *e = NULL;
if ((e = ENGINE_by_id("dynamic")) != NULL) {
if (!ENGINE_ctrl_cmd_string(e, "SO_PATH", engine, 0)
|| !ENGINE_ctrl_cmd_string(e, "LOAD", NULL, 0)) {
ENGINE_free(e);
e = NULL;
}
}
return e;
}
#endif
ENGINE *setup_engine_methods(const char *id, unsigned int methods, int debug)
{
ENGINE *e = NULL;
#ifndef OPENSSL_NO_ENGINE
if (id != NULL) {
if (strcmp(id, "auto") == 0) {
BIO_printf(bio_err, "Enabling auto ENGINE support\n");
ENGINE_register_all_complete();
return NULL;
}
if ((e = ENGINE_by_id(id)) == NULL
&& (e = try_load_engine(id)) == NULL) {
BIO_printf(bio_err, "Invalid engine \"%s\"\n", id);
ERR_print_errors(bio_err);
return NULL;
}
if (debug)
(void)ENGINE_ctrl(e, ENGINE_CTRL_SET_LOGSTREAM, 0, bio_err, 0);
if (!ENGINE_ctrl_cmd(e, "SET_USER_INTERFACE", 0,
(void *)get_ui_method(), 0, 1)
|| !ENGINE_set_default(e, methods)) {
BIO_printf(bio_err, "Cannot use engine \"%s\"\n", ENGINE_get_id(e));
ERR_print_errors(bio_err);
ENGINE_free(e);
return NULL;
}
BIO_printf(bio_err, "Engine \"%s\" set.\n", ENGINE_get_id(e));
}
#endif
return e;
}
void release_engine(ENGINE *e)
{
#ifndef OPENSSL_NO_ENGINE
/* Free our "structural" reference. */
ENGINE_free(e);
#endif
}
int init_engine(ENGINE *e)
{
int rv = 1;
#ifndef OPENSSL_NO_ENGINE
rv = ENGINE_init(e);
#endif
return rv;
}
int finish_engine(ENGINE *e)
{
int rv = 1;
#ifndef OPENSSL_NO_ENGINE
rv = ENGINE_finish(e);
#endif
return rv;
}
EVP_PKEY *load_engine_private_key(ENGINE *e, const char *keyid,
const char *pass, const char *desc)
{
EVP_PKEY *rv = NULL;
#ifndef OPENSSL_NO_ENGINE
if (init_engine(e)) {
PW_CB_DATA cb_data;
cb_data.password = pass;
cb_data.prompt_info = keyid;
rv = ENGINE_load_private_key(e, keyid,
(UI_METHOD *)get_ui_method(), &cb_data);
finish_engine(e);
}
#else
BIO_printf(bio_err, "Engines not supported for loading %s\n", desc);
#endif
return rv;
}
EVP_PKEY *load_engine_public_key(ENGINE *e, const char *keyid,
const char *pass, const char *desc)
{
EVP_PKEY *rv = NULL;
#ifndef OPENSSL_NO_ENGINE
if (init_engine(e)) {
PW_CB_DATA cb_data;
cb_data.password = pass;
cb_data.prompt_info = keyid;
rv = ENGINE_load_public_key(e, keyid,
(UI_METHOD *)get_ui_method(), &cb_data);
finish_engine(e);
}
#else
BIO_printf(bio_err, "Engines not supported for loading %s\n", desc);
#endif
return rv;
}
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