openssl_link.c 8.02 KB
Newer Older
1
/*
Tinderbox User's avatar
Tinderbox User committed
2
 * Portions Copyright (C) 2004-2012  Internet Systems Consortium, Inc. ("ISC")
Mark Andrews's avatar
Mark Andrews committed
3
 * Portions Copyright (C) 1999-2003  Internet Software Consortium.
Automatic Updater's avatar
Automatic Updater committed
4 5 6 7 8 9 10 11 12 13 14 15 16
 *
 * 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.
 *
17
 * Portions Copyright (C) 1995-2000 by Network Associates, Inc.
18
 *
Automatic Updater's avatar
Automatic Updater committed
19
 * Permission to use, copy, modify, and/or distribute this software for any
20 21
 * purpose with or without fee is hereby granted, provided that the above
 * copyright notice and this permission notice appear in all copies.
22
 *
Mark Andrews's avatar
Mark Andrews committed
23 24 25 26 27 28 29
 * 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.
30 31 32 33
 */

/*
 * Principal Author: Brian Wellington
Mark Andrews's avatar
Mark Andrews committed
34
 * $Id$
35
 */
36
#ifdef OPENSSL
37 38 39

#include <config.h>

Brian Wellington's avatar
Brian Wellington committed
40
#include <isc/entropy.h>
41
#include <isc/mem.h>
42 43
#include <isc/mutex.h>
#include <isc/mutexblock.h>
44
#include <isc/string.h>
45
#include <isc/thread.h>
Bob Halley's avatar
Bob Halley committed
46
#include <isc/util.h>
47

48 49
#include <dns/log.h>

Francis Dupont's avatar
Francis Dupont committed
50 51
#include <dst/result.h>

52
#include "dst_internal.h"
53
#include "dst_openssl.h"
54

55
#ifdef USE_ENGINE
56 57
#include <openssl/engine.h>
#endif
58

59
static RAND_METHOD *rm = NULL;
60

61 62
static isc_mutex_t *locks = NULL;
static int nlocks;
63

64
#ifdef USE_ENGINE
Francis Dupont's avatar
Francis Dupont committed
65
static ENGINE *e = NULL;
66 67
#endif

Brian Wellington's avatar
Brian Wellington committed
68 69 70 71 72
static int
entropy_get(unsigned char *buf, int num) {
	isc_result_t result;
	if (num < 0)
		return (-1);
73
	result = dst__entropy_getdata(buf, (unsigned int) num, ISC_FALSE);
74
	return (result == ISC_R_SUCCESS ? 1 : -1);
75 76
}

77 78 79 80 81
static int
entropy_status(void) {
	return (dst__entropy_status() > 32);
}

82 83 84 85 86 87
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, ISC_TRUE);
88
	return (result == ISC_R_SUCCESS ? 1 : -1);
Brian Wellington's avatar
Brian Wellington committed
89 90 91 92 93 94 95 96 97 98 99 100
}

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);
}

101 102
static void
lock_callback(int mode, int type, const char *file, int line) {
103 104
	UNUSED(file);
	UNUSED(line);
105 106 107 108 109 110 111 112 113 114 115
	if ((mode & CRYPTO_LOCK) != 0)
		LOCK(&locks[type]);
	else
		UNLOCK(&locks[type]);
}

static unsigned long
id_callback(void) {
	return ((unsigned long)isc_thread_self());
}

116 117
static void *
mem_alloc(size_t size) {
Francis Dupont's avatar
Francis Dupont committed
118 119 120 121 122 123 124
#ifdef OPENSSL_LEAKS
	void *ptr;

	INSIST(dst__memory_pool != NULL);
	ptr = isc_mem_allocate(dst__memory_pool, size);
	return (ptr);
#else
Mark Andrews's avatar
Mark Andrews committed
125 126
	INSIST(dst__memory_pool != NULL);
	return (isc_mem_allocate(dst__memory_pool, size));
Francis Dupont's avatar
Francis Dupont committed
127
#endif
128 129 130 131
}

static void
mem_free(void *ptr) {
Mark Andrews's avatar
Mark Andrews committed
132
	INSIST(dst__memory_pool != NULL);
133
	if (ptr != NULL)
Mark Andrews's avatar
Mark Andrews committed
134
		isc_mem_free(dst__memory_pool, ptr);
135 136 137 138
}

static void *
mem_realloc(void *ptr, size_t size) {
Francis Dupont's avatar
Francis Dupont committed
139 140 141 142 143 144 145
#ifdef OPENSSL_LEAKS
	void *rptr;

	INSIST(dst__memory_pool != NULL);
	rptr = isc_mem_reallocate(dst__memory_pool, ptr, size);
	return (rptr);
#else
Mark Andrews's avatar
Mark Andrews committed
146
	INSIST(dst__memory_pool != NULL);
147
	return (isc_mem_reallocate(dst__memory_pool, ptr, size));
Francis Dupont's avatar
Francis Dupont committed
148
#endif
149 150
}

Brian Wellington's avatar
Brian Wellington committed
151
isc_result_t
Francis Dupont's avatar
Francis Dupont committed
152
dst__openssl_init(const char *engine) {
153
	isc_result_t result;
Francis Dupont's avatar
Francis Dupont committed
154 155
#ifdef USE_ENGINE
	ENGINE *re;
Francis Dupont's avatar
Francis Dupont committed
156 157 158
#else

	UNUSED(engine);
Francis Dupont's avatar
Francis Dupont committed
159
#endif
160

161 162 163 164 165
#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
166
	CRYPTO_set_mem_functions(mem_alloc, mem_realloc, mem_free);
167
	nlocks = CRYPTO_num_locks();
168
	locks = mem_alloc(sizeof(isc_mutex_t) * nlocks);
169 170 171
	if (locks == NULL)
		return (ISC_R_NOMEMORY);
	result = isc_mutexblock_init(locks, nlocks);
172 173
	if (result != ISC_R_SUCCESS)
		goto cleanup_mutexalloc;
174 175
	CRYPTO_set_locking_callback(lock_callback);
	CRYPTO_set_id_callback(id_callback);
176

177 178
	ERR_load_crypto_strings();

179
	rm = mem_alloc(sizeof(RAND_METHOD));
180 181 182 183
	if (rm == NULL) {
		result = ISC_R_NOMEMORY;
		goto cleanup_mutexinit;
	}
184 185 186 187 188
	rm->seed = NULL;
	rm->bytes = entropy_get;
	rm->cleanup = NULL;
	rm->add = entropy_add;
	rm->pseudorand = entropy_getpseudo;
189
	rm->status = entropy_status;
Francis Dupont's avatar
Francis Dupont committed
190

191
#ifdef USE_ENGINE
Francis Dupont's avatar
Francis Dupont committed
192
	OPENSSL_config(NULL);
Francis Dupont's avatar
Francis Dupont committed
193 194 195 196 197 198

	if (engine != NULL && *engine == '\0')
		engine = NULL;

	if (engine != NULL) {
		e = ENGINE_by_id(engine);
Francis Dupont's avatar
Francis Dupont committed
199
		if (e == NULL) {
Francis Dupont's avatar
Francis Dupont committed
200
			result = DST_R_NOENGINE;
Francis Dupont's avatar
Francis Dupont committed
201 202
			goto cleanup_rm;
		}
Francis Dupont's avatar
Francis Dupont committed
203 204 205
		/* This will init the engine. */
		if (!ENGINE_set_default(e, ENGINE_METHOD_ALL)) {
			result = DST_R_NOENGINE;
Francis Dupont's avatar
Francis Dupont committed
206 207 208
			goto cleanup_rm;
		}
	}
Francis Dupont's avatar
Francis Dupont committed
209

Francis Dupont's avatar
Francis Dupont committed
210 211 212 213 214 215 216 217 218 219 220 221
	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);
222
#else
223
	RAND_set_rand_method(rm);
224
#endif /* USE_ENGINE */
Brian Wellington's avatar
Brian Wellington committed
225
	return (ISC_R_SUCCESS);
226

227
#ifdef USE_ENGINE
228
 cleanup_rm:
Francis Dupont's avatar
Francis Dupont committed
229 230 231
	if (e != NULL)
		ENGINE_free(e);
	e = NULL;
232
	mem_free(rm);
Francis Dupont's avatar
Francis Dupont committed
233
	rm = NULL;
234 235
#endif
 cleanup_mutexinit:
236
	CRYPTO_set_locking_callback(NULL);
237
	DESTROYMUTEXBLOCK(locks, nlocks);
238
 cleanup_mutexalloc:
239
	mem_free(locks);
Francis Dupont's avatar
Francis Dupont committed
240
	locks = NULL;
241
	return (result);
Brian Wellington's avatar
Brian Wellington committed
242 243
}

244
void
Mark Andrews's avatar
Mark Andrews committed
245
dst__openssl_destroy() {
246 247 248 249

	/*
	 * Sequence taken from apps_shutdown() in <apps/apps.h>.
	 */
Francis Dupont's avatar
Francis Dupont committed
250 251 252 253 254 255 256
	if (rm != NULL) {
#if OPENSSL_VERSION_NUMBER >= 0x00907000L
		RAND_cleanup();
#endif
		mem_free(rm);
		rm = NULL;
	}
257
#if (OPENSSL_VERSION_NUMBER >= 0x00907000L)
Francis Dupont's avatar
Francis Dupont committed
258
	CONF_modules_free();
259
#endif
Francis Dupont's avatar
Francis Dupont committed
260
	OBJ_cleanup();
261
	EVP_cleanup();
Francis Dupont's avatar
Francis Dupont committed
262
#if defined(USE_ENGINE)
Francis Dupont's avatar
Francis Dupont committed
263 264 265
	if (e != NULL)
		ENGINE_free(e);
	e = NULL;
266
#if defined(USE_ENGINE) && OPENSSL_VERSION_NUMBER >= 0x00907000L
267 268
	ENGINE_cleanup();
#endif
Francis Dupont's avatar
Francis Dupont committed
269
#endif
270
#if (OPENSSL_VERSION_NUMBER >= 0x00907000L)
271
	CRYPTO_cleanup_all_ex_data();
272
#endif
273 274
	ERR_clear_error();
	ERR_remove_state(0);
Francis Dupont's avatar
Francis Dupont committed
275
	ERR_free_strings();
276 277 278 279 280

#ifdef  DNS_CRYPTO_LEAKS
	CRYPTO_mem_leaks_fp(stderr);
#endif

281 282 283 284
	if (locks != NULL) {
		CRYPTO_set_locking_callback(NULL);
		DESTROYMUTEXBLOCK(locks, nlocks);
		mem_free(locks);
Francis Dupont's avatar
Francis Dupont committed
285
		locks = NULL;
286
	}
287 288
}

289 290 291
isc_result_t
dst__openssl_toresult(isc_result_t fallback) {
	isc_result_t result = fallback;
292
	unsigned long err = ERR_get_error();
293 294 295 296 297 298 299 300 301 302 303 304

	switch (ERR_GET_REASON(err)) {
	case ERR_R_MALLOC_FAILURE:
		result = ISC_R_NOMEMORY;
		break;
	default:
		break;
	}
	ERR_clear_error();
	return (result);
}

305 306 307 308 309 310 311 312 313 314 315 316 317 318 319 320 321 322 323 324
isc_result_t
dst__openssl_toresult2(const char *funcname, isc_result_t fallback) {
	isc_result_t result = fallback;
	unsigned long err = ERR_peek_error();
	const char *file, *data;
	int line, flags;
	char buf[256];

	switch (ERR_GET_REASON(err)) {
	case ERR_R_MALLOC_FAILURE:
		result = ISC_R_NOMEMORY;
		goto done;
	default:
		break;
	}
	isc_log_write(dns_lctx, DNS_LOGCATEGORY_GENERAL,
		      DNS_LOGMODULE_CRYPTO, ISC_LOG_WARNING,
		      "%s failed", funcname);
	for (;;) {
		err = ERR_get_error_line_data(&file, &line, &data, &flags);
Mark Andrews's avatar
Mark Andrews committed
325
		if (err == 0U)
326 327 328 329 330 331 332 333 334 335 336 337 338
			goto done;
		ERR_error_string_n(err, buf, sizeof(buf));
		isc_log_write(dns_lctx, DNS_LOGCATEGORY_GENERAL,
			      DNS_LOGMODULE_CRYPTO, ISC_LOG_INFO,
			      "%s:%s:%d:%s", buf, file, line,
			      (flags & ERR_TXT_STRING) ? data : "");
	}

    done:
	ERR_clear_error();
	return (result);
}

339
#if defined(USE_ENGINE)
Francis Dupont's avatar
Francis Dupont committed
340
ENGINE *
Francis Dupont's avatar
Francis Dupont committed
341
dst__openssl_getengine(const char *engine) {
Francis Dupont's avatar
Francis Dupont committed
342

Francis Dupont's avatar
Francis Dupont committed
343 344
	if (engine == NULL)
		return (NULL);
Francis Dupont's avatar
Francis Dupont committed
345
	if (e == NULL)
Francis Dupont's avatar
Francis Dupont committed
346 347 348 349
		return (NULL);
	if (strcmp(engine, ENGINE_get_id(e)) == 0)
		return (e);
	return (NULL);
Francis Dupont's avatar
Francis Dupont committed
350
}
351
#endif
Francis Dupont's avatar
Francis Dupont committed
352

353 354 355 356
#else /* OPENSSL */

#include <isc/util.h>

Mark Andrews's avatar
Mark Andrews committed
357
EMPTY_TRANSLATION_UNIT
358

359
#endif /* OPENSSL */
360
/*! \file */