00b67f09dd
Also known as ISC bind. This import adds utilities such as host(1), dig(1), and nslookup(1), as well as many other tools and libraries. Change-Id: I035ca46e64f1965d57019e773f4ff0ef035e4aa3
401 lines
8.8 KiB
C
401 lines
8.8 KiB
C
/* $NetBSD: openssl_link.c,v 1.11 2014/12/10 04:37:58 christos Exp $ */
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/*
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* Portions Copyright (C) 2004-2012, 2014 Internet Systems Consortium, Inc. ("ISC")
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* Portions Copyright (C) 1999-2003 Internet Software Consortium.
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*
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* Permission to use, copy, modify, and/or distribute this software for any
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* purpose with or without fee is hereby granted, provided that the above
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* copyright notice and this permission notice appear in all copies.
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*
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* THE SOFTWARE IS PROVIDED "AS IS" AND ISC AND NETWORK ASSOCIATES DISCLAIMS
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* ALL WARRANTIES WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED
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* WARRANTIES OF MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL ISC BE LIABLE
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* FOR ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
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* WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
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* ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF OR
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* IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
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*
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* Portions Copyright (C) 1995-2000 by Network Associates, Inc.
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*
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* Permission to use, copy, modify, and/or distribute this software for any
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* purpose with or without fee is hereby granted, provided that the above
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* copyright notice and this permission notice appear in all copies.
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*
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* THE SOFTWARE IS PROVIDED "AS IS" AND ISC AND NETWORK ASSOCIATES DISCLAIMS
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* ALL WARRANTIES WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED
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* WARRANTIES OF MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL ISC BE LIABLE
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* FOR ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
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* WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
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* ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF OR
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* IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
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*/
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/*
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* Principal Author: Brian Wellington
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* Id
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*/
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#ifdef OPENSSL
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#include <config.h>
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#include <isc/entropy.h>
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#include <isc/mem.h>
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#include <isc/mutex.h>
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#include <isc/mutexblock.h>
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#include <isc/string.h>
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#include <isc/thread.h>
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#include <isc/util.h>
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#include <dns/log.h>
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#include <dst/result.h>
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#include "dst_internal.h"
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#include "dst_openssl.h"
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#ifdef USE_ENGINE
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#include <openssl/engine.h>
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#endif
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static RAND_METHOD *rm = NULL;
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static isc_mutex_t *locks = NULL;
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static int nlocks;
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#ifdef USE_ENGINE
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static ENGINE *e = NULL;
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#endif
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static int
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entropy_get(unsigned char *buf, int num) {
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isc_result_t result;
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if (num < 0)
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return (-1);
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result = dst__entropy_getdata(buf, (unsigned int) num, ISC_FALSE);
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return (result == ISC_R_SUCCESS ? 1 : -1);
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}
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static int
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entropy_status(void) {
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return (dst__entropy_status() > 32);
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}
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static int
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entropy_getpseudo(unsigned char *buf, int num) {
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isc_result_t result;
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if (num < 0)
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return (-1);
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result = dst__entropy_getdata(buf, (unsigned int) num, ISC_TRUE);
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return (result == ISC_R_SUCCESS ? 1 : -1);
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}
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#if OPENSSL_VERSION_NUMBER < 0x10100000L
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static void
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#else
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static int
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#endif
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entropy_add(const void *buf, int num, double entropy) {
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/*
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* Do nothing. The only call to this provides no useful data anyway.
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*/
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UNUSED(buf);
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UNUSED(num);
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UNUSED(entropy);
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#if OPENSSL_VERSION_NUMBER >= 0x10100000L
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return 0;
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#endif
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}
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static void
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lock_callback(int mode, int type, const char *file, int line) {
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UNUSED(file);
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UNUSED(line);
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if ((mode & CRYPTO_LOCK) != 0)
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LOCK(&locks[type]);
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else
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UNLOCK(&locks[type]);
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}
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static unsigned long
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id_callback(void) {
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return ((unsigned long)isc_thread_self());
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}
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static void *
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mem_alloc(size_t size) {
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#ifdef OPENSSL_LEAKS
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void *ptr;
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INSIST(dst__memory_pool != NULL);
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ptr = isc_mem_allocate(dst__memory_pool, size);
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return (ptr);
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#else
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INSIST(dst__memory_pool != NULL);
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return (isc_mem_allocate(dst__memory_pool, size));
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#endif
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}
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static void
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mem_free(void *ptr) {
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INSIST(dst__memory_pool != NULL);
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if (ptr != NULL)
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isc_mem_free(dst__memory_pool, ptr);
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}
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static void *
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mem_realloc(void *ptr, size_t size) {
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#ifdef OPENSSL_LEAKS
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void *rptr;
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INSIST(dst__memory_pool != NULL);
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rptr = isc_mem_reallocate(dst__memory_pool, ptr, size);
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return (rptr);
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#else
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INSIST(dst__memory_pool != NULL);
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return (isc_mem_reallocate(dst__memory_pool, ptr, size));
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#endif
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}
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isc_result_t
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dst__openssl_init(const char *engine) {
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isc_result_t result;
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#ifdef USE_ENGINE
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ENGINE *re;
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#else
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UNUSED(engine);
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#endif
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#ifdef DNS_CRYPTO_LEAKS
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CRYPTO_malloc_debug_init();
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CRYPTO_set_mem_debug_options(V_CRYPTO_MDEBUG_ALL);
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CRYPTO_mem_ctrl(CRYPTO_MEM_CHECK_ON);
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#endif
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CRYPTO_set_mem_functions(mem_alloc, mem_realloc, mem_free);
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nlocks = CRYPTO_num_locks();
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locks = mem_alloc(sizeof(isc_mutex_t) * nlocks);
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if (locks == NULL)
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return (ISC_R_NOMEMORY);
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result = isc_mutexblock_init(locks, nlocks);
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if (result != ISC_R_SUCCESS)
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goto cleanup_mutexalloc;
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CRYPTO_set_locking_callback(lock_callback);
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CRYPTO_set_id_callback(id_callback);
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ERR_load_crypto_strings();
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rm = mem_alloc(sizeof(RAND_METHOD));
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if (rm == NULL) {
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result = ISC_R_NOMEMORY;
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goto cleanup_mutexinit;
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}
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rm->seed = NULL;
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rm->bytes = entropy_get;
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rm->cleanup = NULL;
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rm->add = entropy_add;
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rm->pseudorand = entropy_getpseudo;
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rm->status = entropy_status;
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#ifdef USE_ENGINE
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OPENSSL_config(NULL);
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if (engine != NULL && *engine == '\0')
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engine = NULL;
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if (engine != NULL) {
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e = ENGINE_by_id(engine);
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if (e == NULL) {
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result = DST_R_NOENGINE;
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goto cleanup_rm;
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}
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/* This will init the engine. */
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if (!ENGINE_set_default(e, ENGINE_METHOD_ALL)) {
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result = DST_R_NOENGINE;
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goto cleanup_rm;
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}
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}
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re = ENGINE_get_default_RAND();
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if (re == NULL) {
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re = ENGINE_new();
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if (re == NULL) {
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result = ISC_R_NOMEMORY;
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goto cleanup_rm;
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}
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ENGINE_set_RAND(re, rm);
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ENGINE_set_default_RAND(re);
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ENGINE_free(re);
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} else
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ENGINE_finish(re);
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#else
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RAND_set_rand_method(rm);
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#endif /* USE_ENGINE */
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return (ISC_R_SUCCESS);
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#ifdef USE_ENGINE
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cleanup_rm:
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if (e != NULL)
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ENGINE_free(e);
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e = NULL;
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mem_free(rm);
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rm = NULL;
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#endif
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cleanup_mutexinit:
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CRYPTO_set_locking_callback(NULL);
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DESTROYMUTEXBLOCK(locks, nlocks);
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cleanup_mutexalloc:
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mem_free(locks);
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locks = NULL;
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return (result);
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}
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void
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dst__openssl_destroy(void) {
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/*
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* Sequence taken from apps_shutdown() in <apps/apps.h>.
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*/
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if (rm != NULL) {
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#if OPENSSL_VERSION_NUMBER >= 0x00907000L
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RAND_cleanup();
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#endif
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mem_free(rm);
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rm = NULL;
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}
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#if (OPENSSL_VERSION_NUMBER >= 0x00907000L)
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CONF_modules_free();
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#endif
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OBJ_cleanup();
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EVP_cleanup();
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#if defined(USE_ENGINE)
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if (e != NULL)
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ENGINE_free(e);
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e = NULL;
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#if defined(USE_ENGINE) && OPENSSL_VERSION_NUMBER >= 0x00907000L
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ENGINE_cleanup();
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#endif
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#endif
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#if (OPENSSL_VERSION_NUMBER >= 0x00907000L)
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CRYPTO_cleanup_all_ex_data();
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#endif
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ERR_clear_error();
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ERR_remove_state(0);
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ERR_free_strings();
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#ifdef DNS_CRYPTO_LEAKS
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CRYPTO_mem_leaks_fp(stderr);
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#endif
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if (locks != NULL) {
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CRYPTO_set_locking_callback(NULL);
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DESTROYMUTEXBLOCK(locks, nlocks);
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mem_free(locks);
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locks = NULL;
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}
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}
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static isc_result_t
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toresult(isc_result_t fallback) {
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isc_result_t result = fallback;
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unsigned long err = ERR_get_error();
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#ifdef HAVE_OPENSSL_ECDSA
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int lib = ERR_GET_LIB(err);
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#endif
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int reason = ERR_GET_REASON(err);
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switch (reason) {
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/*
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* ERR_* errors are globally unique; others
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* are unique per sublibrary
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*/
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case ERR_R_MALLOC_FAILURE:
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result = ISC_R_NOMEMORY;
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break;
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default:
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#ifdef HAVE_OPENSSL_ECDSA
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if (lib == ERR_R_ECDSA_LIB &&
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reason == ECDSA_R_RANDOM_NUMBER_GENERATION_FAILED) {
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result = ISC_R_NOENTROPY;
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break;
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}
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#endif
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break;
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}
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return (result);
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}
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isc_result_t
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dst__openssl_toresult(isc_result_t fallback) {
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isc_result_t result;
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result = toresult(fallback);
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ERR_clear_error();
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return (result);
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}
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isc_result_t
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dst__openssl_toresult2(const char *funcname, isc_result_t fallback) {
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return (dst__openssl_toresult3(DNS_LOGCATEGORY_GENERAL,
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funcname, fallback));
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}
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isc_result_t
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dst__openssl_toresult3(isc_logcategory_t *category,
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const char *funcname, isc_result_t fallback) {
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isc_result_t result;
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unsigned long err;
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const char *file, *data;
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int line, flags;
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char buf[256];
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result = toresult(fallback);
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isc_log_write(dns_lctx, category,
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DNS_LOGMODULE_CRYPTO, ISC_LOG_WARNING,
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"%s failed (%s)", funcname,
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isc_result_totext(result));
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if (result == ISC_R_NOMEMORY)
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goto done;
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for (;;) {
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err = ERR_get_error_line_data(&file, &line, &data, &flags);
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if (err == 0U)
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goto done;
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ERR_error_string_n(err, buf, sizeof(buf));
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isc_log_write(dns_lctx, category,
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DNS_LOGMODULE_CRYPTO, ISC_LOG_INFO,
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"%s:%s:%d:%s", buf, file, line,
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(flags & ERR_TXT_STRING) ? data : "");
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}
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done:
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ERR_clear_error();
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return (result);
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}
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#if defined(USE_ENGINE)
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ENGINE *
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dst__openssl_getengine(const char *engine) {
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if (engine == NULL)
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return (NULL);
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if (e == NULL)
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return (NULL);
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if (strcmp(engine, ENGINE_get_id(e)) == 0)
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return (e);
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return (NULL);
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}
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#endif
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#else /* OPENSSL */
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#include <isc/util.h>
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EMPTY_TRANSLATION_UNIT
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#endif /* OPENSSL */
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/*! \file */
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