diff options
Diffstat (limited to 'lib/dns/openssl_link.c')
| -rw-r--r-- | lib/dns/openssl_link.c | 214 |
1 files changed, 214 insertions, 0 deletions
diff --git a/lib/dns/openssl_link.c b/lib/dns/openssl_link.c new file mode 100644 index 0000000..4878f57 --- /dev/null +++ b/lib/dns/openssl_link.c @@ -0,0 +1,214 @@ +/* + * 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 */ |