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/*
* Copyright (C) Internet Systems Consortium, Inc. ("ISC")
*
* SPDX-License-Identifier: MPL-2.0 AND ISC
*
* This Source Code Form is subject to the terms of the Mozilla Public
* License, v. 2.0. If a copy of the MPL was not distributed with this
* file, you can obtain one at https://mozilla.org/MPL/2.0/.
*
* See the COPYRIGHT file distributed with this work for additional
* information regarding copyright ownership.
*/
/*
* Copyright (C) Network Associates, Inc.
*
* Permission to use, copy, modify, and/or distribute this software for any
* purpose with or without fee is hereby granted, provided that the above
* copyright notice and this permission notice appear in all copies.
*
* THE SOFTWARE IS PROVIDED "AS IS" AND ISC AND NETWORK ASSOCIATES DISCLAIMS
* ALL WARRANTIES WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED
* WARRANTIES OF MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL ISC BE LIABLE
* FOR ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
* WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
* ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF OR
* IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
*/
#include <isc/mem.h>
#include <isc/mutex.h>
#include <isc/mutexblock.h>
#include <isc/platform.h>
#include <isc/string.h>
#include <isc/thread.h>
#include <isc/util.h>
#include <dns/log.h>
#include <dst/result.h>
#include "dst_internal.h"
#include "dst_openssl.h"
#if !defined(OPENSSL_NO_ENGINE)
#include <openssl/engine.h>
#endif /* if !defined(OPENSSL_NO_ENGINE) */
#if !defined(OPENSSL_NO_ENGINE)
static ENGINE *e = NULL;
#endif /* if !defined(OPENSSL_NO_ENGINE) */
static void
enable_fips_mode(void) {
#ifdef HAVE_FIPS_MODE
if (FIPS_mode() != 0) {
/*
* FIPS mode is already enabled.
*/
return;
}
if (FIPS_mode_set(1) == 0) {
dst__openssl_toresult2("FIPS_mode_set", DST_R_OPENSSLFAILURE);
exit(1);
}
#endif /* HAVE_FIPS_MODE */
}
isc_result_t
dst__openssl_init(const char *engine) {
isc_result_t result = ISC_R_SUCCESS;
enable_fips_mode();
#if !defined(OPENSSL_NO_ENGINE)
if (engine != NULL && *engine == '\0') {
engine = NULL;
}
if (engine != NULL) {
e = ENGINE_by_id(engine);
if (e == NULL) {
result = DST_R_NOENGINE;
goto cleanup_rm;
}
/* This will init the engine. */
if (!ENGINE_set_default(e, ENGINE_METHOD_ALL)) {
result = DST_R_NOENGINE;
goto cleanup_rm;
}
}
return (ISC_R_SUCCESS);
cleanup_rm:
if (e != NULL) {
ENGINE_free(e);
}
e = NULL;
#else
UNUSED(engine);
#endif /* if !defined(OPENSSL_NO_ENGINE) */
return (result);
}
void
dst__openssl_destroy(void) {
#if !defined(OPENSSL_NO_ENGINE)
if (e != NULL) {
ENGINE_free(e);
}
e = NULL;
#endif /* if !defined(OPENSSL_NO_ENGINE) */
}
static isc_result_t
toresult(isc_result_t fallback) {
isc_result_t result = fallback;
unsigned long err = ERR_peek_error();
#if defined(ECDSA_R_RANDOM_NUMBER_GENERATION_FAILED)
int lib = ERR_GET_LIB(err);
#endif /* if defined(ECDSA_R_RANDOM_NUMBER_GENERATION_FAILED) */
int reason = ERR_GET_REASON(err);
switch (reason) {
/*
* ERR_* errors are globally unique; others
* are unique per sublibrary
*/
case ERR_R_MALLOC_FAILURE:
result = ISC_R_NOMEMORY;
break;
default:
#if defined(ECDSA_R_RANDOM_NUMBER_GENERATION_FAILED)
if (lib == ERR_R_ECDSA_LIB &&
reason == ECDSA_R_RANDOM_NUMBER_GENERATION_FAILED)
{
result = ISC_R_NOENTROPY;
break;
}
#endif /* if defined(ECDSA_R_RANDOM_NUMBER_GENERATION_FAILED) */
break;
}
return (result);
}
isc_result_t
dst__openssl_toresult(isc_result_t fallback) {
isc_result_t result;
result = toresult(fallback);
ERR_clear_error();
return (result);
}
isc_result_t
dst__openssl_toresult2(const char *funcname, isc_result_t fallback) {
return (dst__openssl_toresult3(DNS_LOGCATEGORY_GENERAL, funcname,
fallback));
}
isc_result_t
dst__openssl_toresult3(isc_logcategory_t *category, const char *funcname,
isc_result_t fallback) {
isc_result_t result;
unsigned long err;
const char *file, *data;
int line, flags;
char buf[256];
result = toresult(fallback);
isc_log_write(dns_lctx, category, DNS_LOGMODULE_CRYPTO, ISC_LOG_WARNING,
"%s failed (%s)", funcname, isc_result_totext(result));
if (result == ISC_R_NOMEMORY) {
goto done;
}
for (;;) {
err = ERR_get_error_line_data(&file, &line, &data, &flags);
if (err == 0U) {
goto done;
}
ERR_error_string_n(err, buf, sizeof(buf));
isc_log_write(dns_lctx, category, DNS_LOGMODULE_CRYPTO,
ISC_LOG_INFO, "%s:%s:%d:%s", buf, file, line,
((flags & ERR_TXT_STRING) != 0) ? data : "");
}
done:
ERR_clear_error();
return (result);
}
#if !defined(OPENSSL_NO_ENGINE)
ENGINE *
dst__openssl_getengine(const char *engine) {
if (engine == NULL) {
return (NULL);
}
if (e == NULL) {
return (NULL);
}
if (strcmp(engine, ENGINE_get_id(e)) == 0) {
return (e);
}
return (NULL);
}
#endif /* if !defined(OPENSSL_NO_ENGINE) */
/*! \file */
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