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-rw-r--r--lib/dns/openssl_link.c464
1 files changed, 464 insertions, 0 deletions
diff --git a/lib/dns/openssl_link.c b/lib/dns/openssl_link.c
new file mode 100644
index 0000000..a30a2ab
--- /dev/null
+++ b/lib/dns/openssl_link.c
@@ -0,0 +1,464 @@
+/*
+ * Portions Copyright (C) Internet Systems Consortium, Inc. ("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 http://mozilla.org/MPL/2.0/.
+ *
+ * See the COPYRIGHT file distributed with this work for additional
+ * information regarding copyright ownership.
+ *
+ * Portions 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.
+ */
+
+#ifdef OPENSSL
+
+#include <config.h>
+
+#include <isc/entropy.h>
+#include <isc/mem.h>
+#include <isc/mutex.h>
+#include <isc/mutexblock.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
+
+static RAND_METHOD *rm = NULL;
+
+#if OPENSSL_VERSION_NUMBER < 0x10100000L || defined(LIBRESSL_VERSION_NUMBER)
+static isc_mutex_t *locks = NULL;
+static int nlocks;
+#endif
+
+#if !defined(OPENSSL_NO_ENGINE)
+static ENGINE *e = NULL;
+#endif
+
+static int
+entropy_get(unsigned char *buf, int num) {
+ isc_result_t result;
+ if (num < 0)
+ return (-1);
+ result = dst__entropy_getdata(buf, (unsigned int) num, false);
+ return (result == ISC_R_SUCCESS ? 1 : -1);
+}
+
+static int
+entropy_status(void) {
+ return (dst__entropy_status() > 32);
+}
+
+static int
+entropy_getpseudo(unsigned char *buf, int num) {
+ isc_result_t result;
+ if (num < 0)
+ return (-1);
+ result = dst__entropy_getdata(buf, (unsigned int) num, true);
+ return (result == ISC_R_SUCCESS ? 1 : -1);
+}
+
+#if OPENSSL_VERSION_NUMBER < 0x10100000L || defined(LIBRESSL_VERSION_NUMBER)
+static void
+entropy_add(const void *buf, int num, double entropy) {
+ /*
+ * Do nothing. The only call to this provides no useful data anyway.
+ */
+ UNUSED(buf);
+ UNUSED(num);
+ UNUSED(entropy);
+}
+#else
+static int
+entropy_add(const void *buf, int num, double entropy) {
+ /*
+ * Do nothing. The only call to this provides no useful data anyway.
+ */
+ UNUSED(buf);
+ UNUSED(num);
+ UNUSED(entropy);
+ return (1);
+}
+#endif
+
+#if OPENSSL_VERSION_NUMBER >= 0x10000000L && OPENSSL_VERSION_NUMBER < 0x10100000L || defined(LIBRESSL_VERSION_NUMBER)
+static void
+lock_callback(int mode, int type, const char *file, int line) {
+ UNUSED(file);
+ UNUSED(line);
+ if ((mode & CRYPTO_LOCK) != 0)
+ LOCK(&locks[type]);
+ else
+ UNLOCK(&locks[type]);
+}
+#endif
+
+#if OPENSSL_VERSION_NUMBER < 0x10000000L || defined(LIBRESSL_VERSION_NUMBER)
+static unsigned long
+id_callback(void) {
+ return ((unsigned long)isc_thread_self());
+}
+#endif
+
+#if OPENSSL_VERSION_NUMBER < 0x10100000L || defined(LIBRESSL_VERSION_NUMBER)
+
+#define FLARG
+#define FILELINE
+#if ISC_MEM_TRACKLINES
+#define FLARG_PASS , __FILE__, __LINE__
+#else
+#define FLARG_PASS
+#endif
+
+#else
+
+#define FLARG , const char *file, int line
+#define FILELINE , __FILE__, __LINE__
+#if ISC_MEM_TRACKLINES
+#define FLARG_PASS , file, line
+#else
+#define FLARG_PASS
+#endif
+
+#endif
+
+static void *
+mem_alloc(size_t size FLARG) {
+#ifdef OPENSSL_LEAKS
+ void *ptr;
+
+ INSIST(dst__memory_pool != NULL);
+ ptr = isc__mem_allocate(dst__memory_pool, size FLARG_PASS);
+ return (ptr);
+#else
+ INSIST(dst__memory_pool != NULL);
+ return (isc__mem_allocate(dst__memory_pool, size FLARG_PASS));
+#endif
+}
+
+static void
+mem_free(void *ptr FLARG) {
+ INSIST(dst__memory_pool != NULL);
+ if (ptr != NULL)
+ isc__mem_free(dst__memory_pool, ptr FLARG_PASS);
+}
+
+static void *
+mem_realloc(void *ptr, size_t size FLARG) {
+#ifdef OPENSSL_LEAKS
+ void *rptr;
+
+ INSIST(dst__memory_pool != NULL);
+ rptr = isc__mem_reallocate(dst__memory_pool, ptr, size FLARG_PASS);
+ return (rptr);
+#else
+ INSIST(dst__memory_pool != NULL);
+ return (isc__mem_reallocate(dst__memory_pool, ptr, size FLARG_PASS));
+#endif
+}
+
+#if OPENSSL_VERSION_NUMBER >= 0x10000000L && OPENSSL_VERSION_NUMBER < 0x10100000L
+static void
+_set_thread_id(CRYPTO_THREADID *id)
+{
+ CRYPTO_THREADID_set_numeric(id, (unsigned long)isc_thread_self());
+}
+#endif
+
+isc_result_t
+dst__openssl_init(const char *engine) {
+ isc_result_t result;
+#if !defined(OPENSSL_NO_ENGINE)
+ ENGINE *re;
+#else
+ UNUSED(engine);
+#endif
+
+#ifdef DNS_CRYPTO_LEAKS
+ CRYPTO_malloc_debug_init();
+ CRYPTO_set_mem_debug_options(V_CRYPTO_MDEBUG_ALL);
+ CRYPTO_mem_ctrl(CRYPTO_MEM_CHECK_ON);
+#endif
+ CRYPTO_set_mem_functions(mem_alloc, mem_realloc, mem_free);
+#if OPENSSL_VERSION_NUMBER < 0x10100000L || defined(LIBRESSL_VERSION_NUMBER)
+ nlocks = CRYPTO_num_locks();
+ locks = mem_alloc(sizeof(isc_mutex_t) * nlocks FILELINE);
+ if (locks == NULL)
+ return (ISC_R_NOMEMORY);
+ result = isc_mutexblock_init(locks, nlocks);
+ if (result != ISC_R_SUCCESS)
+ goto cleanup_mutexalloc;
+ CRYPTO_set_locking_callback(lock_callback);
+# if OPENSSL_VERSION_NUMBER >= 0x10000000L && OPENSSL_VERSION_NUMBER < 0x10100000L
+ CRYPTO_THREADID_set_callback(_set_thread_id);
+# else
+ CRYPTO_set_id_callback(id_callback);
+# endif
+
+ ERR_load_crypto_strings();
+#endif
+
+ rm = mem_alloc(sizeof(RAND_METHOD) FILELINE);
+ if (rm == NULL) {
+ result = ISC_R_NOMEMORY;
+ goto cleanup_mutexinit;
+ }
+ rm->seed = NULL;
+ rm->bytes = entropy_get;
+ rm->cleanup = NULL;
+ rm->add = entropy_add;
+ rm->pseudorand = entropy_getpseudo;
+ rm->status = entropy_status;
+
+#if !defined(OPENSSL_NO_ENGINE)
+#if !defined(CONF_MFLAGS_DEFAULT_SECTION)
+ OPENSSL_config(NULL);
+#else
+ /*
+ * OPENSSL_config() can only be called a single time as of
+ * 1.0.2e so do the steps individually.
+ */
+ OPENSSL_load_builtin_modules();
+ ENGINE_load_builtin_engines();
+ ERR_clear_error();
+ CONF_modules_load_file(NULL, NULL,
+ CONF_MFLAGS_DEFAULT_SECTION |
+ CONF_MFLAGS_IGNORE_MISSING_FILE);
+#endif
+
+ 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;
+ }
+ }
+
+ re = ENGINE_get_default_RAND();
+ if (re == NULL) {
+ re = ENGINE_new();
+ if (re == NULL) {
+ result = ISC_R_NOMEMORY;
+ goto cleanup_rm;
+ }
+ ENGINE_set_RAND(re, rm);
+ ENGINE_set_default_RAND(re);
+ ENGINE_free(re);
+ } else
+ ENGINE_finish(re);
+#else
+ RAND_set_rand_method(rm);
+#endif /* !defined(OPENSSL_NO_ENGINE) */
+ return (ISC_R_SUCCESS);
+
+#if !defined(OPENSSL_NO_ENGINE)
+ cleanup_rm:
+ if (e != NULL)
+ ENGINE_free(e);
+ e = NULL;
+ mem_free(rm FILELINE);
+ rm = NULL;
+#endif
+ cleanup_mutexinit:
+#if OPENSSL_VERSION_NUMBER < 0x10100000L || defined(LIBRESSL_VERSION_NUMBER)
+ CRYPTO_set_locking_callback(NULL);
+ DESTROYMUTEXBLOCK(locks, nlocks);
+ cleanup_mutexalloc:
+ mem_free(locks FILELINE);
+ locks = NULL;
+#endif
+ return (result);
+}
+
+void
+dst__openssl_destroy(void) {
+#if !defined(LIBRESSL_VERSION_NUMBER) && (OPENSSL_VERSION_NUMBER >= 0x10100000L)
+ OPENSSL_cleanup();
+ if (rm != NULL) {
+ mem_free(rm FILELINE);
+ rm = NULL;
+ }
+#else
+ /*
+ * Sequence taken from apps_shutdown() in <apps/apps.h>.
+ */
+ if (rm != NULL) {
+#if OPENSSL_VERSION_NUMBER >= 0x00907000L
+ RAND_cleanup();
+#endif
+ mem_free(rm FILELINE);
+ rm = NULL;
+ }
+#if (OPENSSL_VERSION_NUMBER >= 0x00907000L)
+ CONF_modules_free();
+#endif
+ OBJ_cleanup();
+ EVP_cleanup();
+#if !defined(OPENSSL_NO_ENGINE)
+ if (e != NULL)
+ ENGINE_free(e);
+ e = NULL;
+#if !defined(OPENSSL_NO_ENGINE) && OPENSSL_VERSION_NUMBER >= 0x00907000L
+ ENGINE_cleanup();
+#endif
+#endif
+#if (OPENSSL_VERSION_NUMBER >= 0x00907000L)
+ CRYPTO_cleanup_all_ex_data();
+#endif
+ ERR_clear_error();
+#if OPENSSL_VERSION_NUMBER >= 0x10000000L && OPENSSL_VERSION_NUMBER < 0x10100000L
+ ERR_remove_thread_state(NULL);
+#elif OPENSSL_VERSION_NUMBER < 0x10000000L || defined(LIBRESSL_VERSION_NUMBER)
+ ERR_remove_state(0);
+#endif
+ ERR_free_strings();
+
+#ifdef DNS_CRYPTO_LEAKS
+ CRYPTO_mem_leaks_fp(stderr);
+#endif
+
+ if (locks != NULL) {
+ CRYPTO_set_locking_callback(NULL);
+ DESTROYMUTEXBLOCK(locks, nlocks);
+ mem_free(locks FILELINE);
+ locks = NULL;
+ }
+#endif
+}
+
+static isc_result_t
+toresult(isc_result_t fallback) {
+ isc_result_t result = fallback;
+ unsigned long err = ERR_peek_error();
+#if defined(HAVE_OPENSSL_ECDSA) && \
+ defined(ECDSA_R_RANDOM_NUMBER_GENERATION_FAILED)
+ int lib = ERR_GET_LIB(err);
+#endif
+ 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(HAVE_OPENSSL_ECDSA) && \
+ 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
+ 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) ? 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
+
+#else /* OPENSSL */
+
+#include <isc/util.h>
+
+EMPTY_TRANSLATION_UNIT
+
+#endif /* OPENSSL */
+/*! \file */