xref: /openbsd/lib/libtls/tls_config.c (revision 15dff5ba) 
1 /* $OpenBSD: tls_config.c,v 1.57 2019/11/16 06:44:33 beck Exp $ */
2 /*
3  * Copyright (c) 2014 Joel Sing <jsing@openbsd.org>
4  *
5  * Permission to use, copy, modify, and distribute this software for any
6  * purpose with or without fee is hereby granted, provided that the above
7  * copyright notice and this permission notice appear in all copies.
8  *
9  * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
10  * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
11  * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
12  * ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
13  * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
14  * ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
15  * OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
16  */
17 
18 #include <sys/stat.h>
19 
20 #include <ctype.h>
21 #include <errno.h>
22 #include <fcntl.h>
23 #include <pthread.h>
24 #include <stdlib.h>
25 #include <unistd.h>
26 
27 #include <tls.h>
28 
29 #include "tls_internal.h"
30 
31 static const char default_ca_file[] = TLS_DEFAULT_CA_FILE;
32 
33 const char *
34 tls_default_ca_cert_file(void)
35 {
36 	return default_ca_file;
37 }
38 
39 int
40 tls_config_load_file(struct tls_error *error, const char *filetype,
41     const char *filename, char **buf, size_t *len)
42 {
43 	struct stat st;
44 	int fd = -1;
45 	ssize_t n;
46 
47 	free(*buf);
48 	*buf = NULL;
49 	*len = 0;
50 
51 	if ((fd = open(filename, O_RDONLY)) == -1) {
52 		tls_error_set(error, "failed to open %s file '%s'",
53 		    filetype, filename);
54 		goto err;
55 	}
56 	if (fstat(fd, &st) != 0) {
57 		tls_error_set(error, "failed to stat %s file '%s'",
58 		    filetype, filename);
59 		goto err;
60 	}
61 	if (st.st_size < 0)
62 		goto err;
63 	*len = (size_t)st.st_size;
64 	if ((*buf = malloc(*len)) == NULL) {
65 		tls_error_set(error, "failed to allocate buffer for "
66 		    "%s file", filetype);
67 		goto err;
68 	}
69 	n = read(fd, *buf, *len);
70 	if (n < 0 || (size_t)n != *len) {
71 		tls_error_set(error, "failed to read %s file '%s'",
72 		    filetype, filename);
73 		goto err;
74 	}
75 	close(fd);
76 	return 0;
77 
78  err:
79 	if (fd != -1)
80 		close(fd);
81 	freezero(*buf, *len);
82 	*buf = NULL;
83 	*len = 0;
84 
85 	return -1;
86 }
87 
88 struct tls_config *
89 tls_config_new_internal(void)
90 {
91 	struct tls_config *config;
92 	unsigned char sid[TLS_MAX_SESSION_ID_LENGTH];
93 
94 	if ((config = calloc(1, sizeof(*config))) == NULL)
95 		return (NULL);
96 
97 	if (pthread_mutex_init(&config->mutex, NULL) != 0)
98 		goto err;
99 
100 	config->refcount = 1;
101 	config->session_fd = -1;
102 
103 	if ((config->keypair = tls_keypair_new()) == NULL)
104 		goto err;
105 
106 	/*
107 	 * Default configuration.
108 	 */
109 	if (tls_config_set_dheparams(config, "none") != 0)
110 		goto err;
111 	if (tls_config_set_ecdhecurves(config, "default") != 0)
112 		goto err;
113 	if (tls_config_set_ciphers(config, "secure") != 0)
114 		goto err;
115 
116 	if (tls_config_set_protocols(config, TLS_PROTOCOLS_DEFAULT) != 0)
117 		goto err;
118 	if (tls_config_set_verify_depth(config, 6) != 0)
119 		goto err;
120 
121 	/*
122 	 * Set session ID context to a random value.  For the simple case
123 	 * of a single process server this is good enough. For multiprocess
124 	 * servers the session ID needs to be set by the caller.
125 	 */
126 	arc4random_buf(sid, sizeof(sid));
127 	if (tls_config_set_session_id(config, sid, sizeof(sid)) != 0)
128 		goto err;
129 	config->ticket_keyrev = arc4random();
130 	config->ticket_autorekey = 1;
131 
132 	tls_config_prefer_ciphers_server(config);
133 
134 	tls_config_verify(config);
135 
136 	return (config);
137 
138  err:
139 	tls_config_free(config);
140 	return (NULL);
141 }
142 
143 struct tls_config *
144 tls_config_new(void)
145 {
146 	if (tls_init() == -1)
147 		return (NULL);
148 
149 	return tls_config_new_internal();
150 }
151 
152 void
153 tls_config_free(struct tls_config *config)
154 {
155 	struct tls_keypair *kp, *nkp;
156 	int refcount;
157 
158 	if (config == NULL)
159 		return;
160 
161 	pthread_mutex_lock(&config->mutex);
162 	refcount = --config->refcount;
163 	pthread_mutex_unlock(&config->mutex);
164 
165 	if (refcount > 0)
166 		return;
167 
168 	for (kp = config->keypair; kp != NULL; kp = nkp) {
169 		nkp = kp->next;
170 		tls_keypair_free(kp);
171 	}
172 
173 	free(config->error.msg);
174 
175 	free(config->alpn);
176 	free((char *)config->ca_mem);
177 	free((char *)config->ca_path);
178 	free((char *)config->ciphers);
179 	free((char *)config->crl_mem);
180 	free(config->ecdhecurves);
181 
182 	free(config);
183 }
184 
185 static void
186 tls_config_keypair_add(struct tls_config *config, struct tls_keypair *keypair)
187 {
188 	struct tls_keypair *kp;
189 
190 	kp = config->keypair;
191 	while (kp->next != NULL)
192 		kp = kp->next;
193 
194 	kp->next = keypair;
195 }
196 
197 const char *
198 tls_config_error(struct tls_config *config)
199 {
200 	return config->error.msg;
201 }
202 
203 void
204 tls_config_clear_keys(struct tls_config *config)
205 {
206 	struct tls_keypair *kp;
207 
208 	for (kp = config->keypair; kp != NULL; kp = kp->next)
209 		tls_keypair_clear_key(kp);
210 }
211 
212 int
213 tls_config_parse_protocols(uint32_t *protocols, const char *protostr)
214 {
215 	uint32_t proto, protos = 0;
216 	char *s, *p, *q;
217 	int negate;
218 
219 	if (protostr == NULL) {
220 		*protocols = TLS_PROTOCOLS_DEFAULT;
221 		return (0);
222 	}
223 
224 	if ((s = strdup(protostr)) == NULL)
225 		return (-1);
226 
227 	q = s;
228 	while ((p = strsep(&q, ",:")) != NULL) {
229 		while (*p == ' ' || *p == '\t')
230 			p++;
231 
232 		negate = 0;
233 		if (*p == '!') {
234 			negate = 1;
235 			p++;
236 		}
237 
238 		if (negate && protos == 0)
239 			protos = TLS_PROTOCOLS_ALL;
240 
241 		proto = 0;
242 		if (strcasecmp(p, "all") == 0 ||
243 		    strcasecmp(p, "legacy") == 0)
244 			proto = TLS_PROTOCOLS_ALL;
245 		else if (strcasecmp(p, "default") == 0 ||
246 		    strcasecmp(p, "secure") == 0)
247 			proto = TLS_PROTOCOLS_DEFAULT;
248 		if (strcasecmp(p, "tlsv1") == 0)
249 			proto = TLS_PROTOCOL_TLSv1;
250 		else if (strcasecmp(p, "tlsv1.0") == 0)
251 			proto = TLS_PROTOCOL_TLSv1_0;
252 		else if (strcasecmp(p, "tlsv1.1") == 0)
253 			proto = TLS_PROTOCOL_TLSv1_1;
254 		else if (strcasecmp(p, "tlsv1.2") == 0)
255 			proto = TLS_PROTOCOL_TLSv1_2;
256 
257 		if (proto == 0) {
258 			free(s);
259 			return (-1);
260 		}
261 
262 		if (negate)
263 			protos &= ~proto;
264 		else
265 			protos |= proto;
266 	}
267 
268 	*protocols = protos;
269 
270 	free(s);
271 
272 	return (0);
273 }
274 
275 static int
276 tls_config_parse_alpn(struct tls_config *config, const char *alpn,
277     char **alpn_data, size_t *alpn_len)
278 {
279 	size_t buf_len, i, len;
280 	char *buf = NULL;
281 	char *s = NULL;
282 	char *p, *q;
283 
284 	free(*alpn_data);
285 	*alpn_data = NULL;
286 	*alpn_len = 0;
287 
288 	if ((buf_len = strlen(alpn) + 1) > 65535) {
289 		tls_config_set_errorx(config, "alpn too large");
290 		goto err;
291 	}
292 
293 	if ((buf = malloc(buf_len)) == NULL) {
294 		tls_config_set_errorx(config, "out of memory");
295 		goto err;
296 	}
297 
298 	if ((s = strdup(alpn)) == NULL) {
299 		tls_config_set_errorx(config, "out of memory");
300 		goto err;
301 	}
302 
303 	i = 0;
304 	q = s;
305 	while ((p = strsep(&q, ",")) != NULL) {
306 		if ((len = strlen(p)) == 0) {
307 			tls_config_set_errorx(config,
308 			    "alpn protocol with zero length");
309 			goto err;
310 		}
311 		if (len > 255) {
312 			tls_config_set_errorx(config,
313 			    "alpn protocol too long");
314 			goto err;
315 		}
316 		buf[i++] = len & 0xff;
317 		memcpy(&buf[i], p, len);
318 		i += len;
319 	}
320 
321 	free(s);
322 
323 	*alpn_data = buf;
324 	*alpn_len = buf_len;
325 
326 	return (0);
327 
328  err:
329 	free(buf);
330 	free(s);
331 
332 	return (-1);
333 }
334 
335 int
336 tls_config_set_alpn(struct tls_config *config, const char *alpn)
337 {
338 	return tls_config_parse_alpn(config, alpn, &config->alpn,
339 	    &config->alpn_len);
340 }
341 
342 static int
343 tls_config_add_keypair_file_internal(struct tls_config *config,
344     const char *cert_file, const char *key_file, const char *ocsp_file)
345 {
346 	struct tls_keypair *keypair;
347 
348 	if ((keypair = tls_keypair_new()) == NULL)
349 		return (-1);
350 	if (tls_keypair_set_cert_file(keypair, &config->error, cert_file) != 0)
351 		goto err;
352 	if (tls_keypair_set_key_file(keypair, &config->error, key_file) != 0)
353 		goto err;
354 	if (ocsp_file != NULL &&
355 	    tls_keypair_set_ocsp_staple_file(keypair, &config->error,
356 		ocsp_file) != 0)
357 		goto err;
358 
359 	tls_config_keypair_add(config, keypair);
360 
361 	return (0);
362 
363  err:
364 	tls_keypair_free(keypair);
365 	return (-1);
366 }
367 
368 static int
369 tls_config_add_keypair_mem_internal(struct tls_config *config, const uint8_t *cert,
370     size_t cert_len, const uint8_t *key, size_t key_len,
371     const uint8_t *staple, size_t staple_len)
372 {
373 	struct tls_keypair *keypair;
374 
375 	if ((keypair = tls_keypair_new()) == NULL)
376 		return (-1);
377 	if (tls_keypair_set_cert_mem(keypair, &config->error, cert, cert_len) != 0)
378 		goto err;
379 	if (tls_keypair_set_key_mem(keypair, &config->error, key, key_len) != 0)
380 		goto err;
381 	if (staple != NULL &&
382 	    tls_keypair_set_ocsp_staple_mem(keypair, &config->error, staple,
383 		staple_len) != 0)
384 		goto err;
385 
386 	tls_config_keypair_add(config, keypair);
387 
388 	return (0);
389 
390  err:
391 	tls_keypair_free(keypair);
392 	return (-1);
393 }
394 
395 int
396 tls_config_add_keypair_mem(struct tls_config *config, const uint8_t *cert,
397     size_t cert_len, const uint8_t *key, size_t key_len)
398 {
399 	return tls_config_add_keypair_mem_internal(config, cert, cert_len, key,
400 	    key_len, NULL, 0);
401 }
402 
403 int
404 tls_config_add_keypair_file(struct tls_config *config,
405     const char *cert_file, const char *key_file)
406 {
407 	return tls_config_add_keypair_file_internal(config, cert_file,
408 	    key_file, NULL);
409 }
410 
411 int
412 tls_config_add_keypair_ocsp_mem(struct tls_config *config, const uint8_t *cert,
413     size_t cert_len, const uint8_t *key, size_t key_len, const uint8_t *staple,
414     size_t staple_len)
415 {
416 	return tls_config_add_keypair_mem_internal(config, cert, cert_len, key,
417 	    key_len, staple, staple_len);
418 }
419 
420 int
421 tls_config_add_keypair_ocsp_file(struct tls_config *config,
422     const char *cert_file, const char *key_file, const char *ocsp_file)
423 {
424 	return tls_config_add_keypair_file_internal(config, cert_file,
425 	    key_file, ocsp_file);
426 }
427 
428 int
429 tls_config_set_ca_file(struct tls_config *config, const char *ca_file)
430 {
431 	return tls_config_load_file(&config->error, "CA", ca_file,
432 	    &config->ca_mem, &config->ca_len);
433 }
434 
435 int
436 tls_config_set_ca_path(struct tls_config *config, const char *ca_path)
437 {
438 	return tls_set_string(&config->ca_path, ca_path);
439 }
440 
441 int
442 tls_config_set_ca_mem(struct tls_config *config, const uint8_t *ca, size_t len)
443 {
444 	return tls_set_mem(&config->ca_mem, &config->ca_len, ca, len);
445 }
446 
447 int
448 tls_config_set_cert_file(struct tls_config *config, const char *cert_file)
449 {
450 	return tls_keypair_set_cert_file(config->keypair, &config->error,
451 	    cert_file);
452 }
453 
454 int
455 tls_config_set_cert_mem(struct tls_config *config, const uint8_t *cert,
456     size_t len)
457 {
458 	return tls_keypair_set_cert_mem(config->keypair, &config->error,
459 	    cert, len);
460 }
461 
462 int
463 tls_config_set_ciphers(struct tls_config *config, const char *ciphers)
464 {
465 	SSL_CTX *ssl_ctx = NULL;
466 
467 	if (ciphers == NULL ||
468 	    strcasecmp(ciphers, "default") == 0 ||
469 	    strcasecmp(ciphers, "secure") == 0)
470 		ciphers = TLS_CIPHERS_DEFAULT;
471 	else if (strcasecmp(ciphers, "compat") == 0)
472 		ciphers = TLS_CIPHERS_COMPAT;
473 	else if (strcasecmp(ciphers, "legacy") == 0)
474 		ciphers = TLS_CIPHERS_LEGACY;
475 	else if (strcasecmp(ciphers, "all") == 0 ||
476 	    strcasecmp(ciphers, "insecure") == 0)
477 		ciphers = TLS_CIPHERS_ALL;
478 
479 	if ((ssl_ctx = SSL_CTX_new(SSLv23_method())) == NULL) {
480 		tls_config_set_errorx(config, "out of memory");
481 		goto err;
482 	}
483 	if (SSL_CTX_set_cipher_list(ssl_ctx, ciphers) != 1) {
484 		tls_config_set_errorx(config, "no ciphers for '%s'", ciphers);
485 		goto err;
486 	}
487 
488 	SSL_CTX_free(ssl_ctx);
489 	return tls_set_string(&config->ciphers, ciphers);
490 
491  err:
492 	SSL_CTX_free(ssl_ctx);
493 	return -1;
494 }
495 
496 int
497 tls_config_set_crl_file(struct tls_config *config, const char *crl_file)
498 {
499 	return tls_config_load_file(&config->error, "CRL", crl_file,
500 	    &config->crl_mem, &config->crl_len);
501 }
502 
503 int
504 tls_config_set_crl_mem(struct tls_config *config, const uint8_t *crl,
505     size_t len)
506 {
507 	return tls_set_mem(&config->crl_mem, &config->crl_len, crl, len);
508 }
509 
510 int
511 tls_config_set_dheparams(struct tls_config *config, const char *params)
512 {
513 	int keylen;
514 
515 	if (params == NULL || strcasecmp(params, "none") == 0)
516 		keylen = 0;
517 	else if (strcasecmp(params, "auto") == 0)
518 		keylen = -1;
519 	else if (strcasecmp(params, "legacy") == 0)
520 		keylen = 1024;
521 	else {
522 		tls_config_set_errorx(config, "invalid dhe param '%s'", params);
523 		return (-1);
524 	}
525 
526 	config->dheparams = keylen;
527 
528 	return (0);
529 }
530 
531 int
532 tls_config_set_ecdhecurve(struct tls_config *config, const char *curve)
533 {
534 	if (curve == NULL ||
535 	    strcasecmp(curve, "none") == 0 ||
536 	    strcasecmp(curve, "auto") == 0) {
537 		curve = TLS_ECDHE_CURVES;
538 	} else if (strchr(curve, ',') != NULL || strchr(curve, ':') != NULL) {
539 		tls_config_set_errorx(config, "invalid ecdhe curve '%s'",
540 		    curve);
541 		return (-1);
542 	}
543 
544 	return tls_config_set_ecdhecurves(config, curve);
545 }
546 
547 int
548 tls_config_set_ecdhecurves(struct tls_config *config, const char *curves)
549 {
550 	int *curves_list = NULL, *curves_new;
551 	size_t curves_num = 0;
552 	char *cs = NULL;
553 	char *p, *q;
554 	int rv = -1;
555 	int nid;
556 
557 	free(config->ecdhecurves);
558 	config->ecdhecurves = NULL;
559 	config->ecdhecurves_len = 0;
560 
561 	if (curves == NULL || strcasecmp(curves, "default") == 0)
562 		curves = TLS_ECDHE_CURVES;
563 
564 	if ((cs = strdup(curves)) == NULL) {
565 		tls_config_set_errorx(config, "out of memory");
566 		goto err;
567 	}
568 
569 	q = cs;
570 	while ((p = strsep(&q, ",:")) != NULL) {
571 		while (*p == ' ' || *p == '\t')
572 			p++;
573 
574 		nid = OBJ_sn2nid(p);
575 		if (nid == NID_undef)
576 			nid = OBJ_ln2nid(p);
577 		if (nid == NID_undef)
578 			nid = EC_curve_nist2nid(p);
579 		if (nid == NID_undef) {
580 			tls_config_set_errorx(config,
581 			    "invalid ecdhe curve '%s'", p);
582 			goto err;
583 		}
584 
585 		if ((curves_new = reallocarray(curves_list, curves_num + 1,
586 		    sizeof(int))) == NULL) {
587 			tls_config_set_errorx(config, "out of memory");
588 			goto err;
589 		}
590 		curves_list = curves_new;
591 		curves_list[curves_num] = nid;
592 		curves_num++;
593 	}
594 
595 	config->ecdhecurves = curves_list;
596 	config->ecdhecurves_len = curves_num;
597 	curves_list = NULL;
598 
599 	rv = 0;
600 
601  err:
602 	free(cs);
603 	free(curves_list);
604 
605 	return (rv);
606 }
607 
608 int
609 tls_config_set_key_file(struct tls_config *config, const char *key_file)
610 {
611 	return tls_keypair_set_key_file(config->keypair, &config->error,
612 	    key_file);
613 }
614 
615 int
616 tls_config_set_key_mem(struct tls_config *config, const uint8_t *key,
617     size_t len)
618 {
619 	return tls_keypair_set_key_mem(config->keypair, &config->error,
620 	    key, len);
621 }
622 
623 static int
624 tls_config_set_keypair_file_internal(struct tls_config *config,
625     const char *cert_file, const char *key_file, const char *ocsp_file)
626 {
627 	if (tls_config_set_cert_file(config, cert_file) != 0)
628 		return (-1);
629 	if (tls_config_set_key_file(config, key_file) != 0)
630 		return (-1);
631 	if (ocsp_file != NULL &&
632 	    tls_config_set_ocsp_staple_file(config, ocsp_file) != 0)
633 		return (-1);
634 
635 	return (0);
636 }
637 
638 static int
639 tls_config_set_keypair_mem_internal(struct tls_config *config, const uint8_t *cert,
640     size_t cert_len, const uint8_t *key, size_t key_len,
641     const uint8_t *staple, size_t staple_len)
642 {
643 	if (tls_config_set_cert_mem(config, cert, cert_len) != 0)
644 		return (-1);
645 	if (tls_config_set_key_mem(config, key, key_len) != 0)
646 		return (-1);
647 	if ((staple != NULL) &&
648 	    (tls_config_set_ocsp_staple_mem(config, staple, staple_len) != 0))
649 		return (-1);
650 
651 	return (0);
652 }
653 
654 int
655 tls_config_set_keypair_file(struct tls_config *config,
656     const char *cert_file, const char *key_file)
657 {
658 	return tls_config_set_keypair_file_internal(config, cert_file, key_file,
659 	    NULL);
660 }
661 
662 int
663 tls_config_set_keypair_mem(struct tls_config *config, const uint8_t *cert,
664     size_t cert_len, const uint8_t *key, size_t key_len)
665 {
666 	return tls_config_set_keypair_mem_internal(config, cert, cert_len,
667 	    key, key_len, NULL, 0);
668 }
669 
670 int
671 tls_config_set_keypair_ocsp_file(struct tls_config *config,
672     const char *cert_file, const char *key_file, const char *ocsp_file)
673 {
674 	return tls_config_set_keypair_file_internal(config, cert_file, key_file,
675 	    ocsp_file);
676 }
677 
678 int
679 tls_config_set_keypair_ocsp_mem(struct tls_config *config, const uint8_t *cert,
680     size_t cert_len, const uint8_t *key, size_t key_len,
681     const uint8_t *staple, size_t staple_len)
682 {
683 	return tls_config_set_keypair_mem_internal(config, cert, cert_len,
684 	    key, key_len, staple, staple_len);
685 }
686 
687 
688 int
689 tls_config_set_protocols(struct tls_config *config, uint32_t protocols)
690 {
691 	config->protocols = protocols;
692 
693 	return (0);
694 }
695 
696 int
697 tls_config_set_session_fd(struct tls_config *config, int session_fd)
698 {
699 	struct stat sb;
700 	mode_t mugo;
701 
702 	if (session_fd == -1) {
703 		config->session_fd = session_fd;
704 		return (0);
705 	}
706 
707 	if (fstat(session_fd, &sb) == -1) {
708 		tls_config_set_error(config, "failed to stat session file");
709 		return (-1);
710 	}
711 	if (!S_ISREG(sb.st_mode)) {
712 		tls_config_set_errorx(config,
713 		    "session file is not a regular file");
714 		return (-1);
715 	}
716 
717 	if (sb.st_uid != getuid()) {
718 		tls_config_set_errorx(config, "session file has incorrect "
719 		    "owner (uid %i != %i)", sb.st_uid, getuid());
720 		return (-1);
721 	}
722 	mugo = sb.st_mode & (S_IRWXU|S_IRWXG|S_IRWXO);
723 	if (mugo != (S_IRUSR|S_IWUSR)) {
724 		tls_config_set_errorx(config, "session file has incorrect "
725 		    "permissions (%o != 600)", mugo);
726 		return (-1);
727 	}
728 
729 	config->session_fd = session_fd;
730 
731 	return (0);
732 }
733 
734 int
735 tls_config_set_verify_depth(struct tls_config *config, int verify_depth)
736 {
737 	config->verify_depth = verify_depth;
738 
739 	return (0);
740 }
741 
742 void
743 tls_config_prefer_ciphers_client(struct tls_config *config)
744 {
745 	config->ciphers_server = 0;
746 }
747 
748 void
749 tls_config_prefer_ciphers_server(struct tls_config *config)
750 {
751 	config->ciphers_server = 1;
752 }
753 
754 void
755 tls_config_insecure_noverifycert(struct tls_config *config)
756 {
757 	config->verify_cert = 0;
758 }
759 
760 void
761 tls_config_insecure_noverifyname(struct tls_config *config)
762 {
763 	config->verify_name = 0;
764 }
765 
766 void
767 tls_config_insecure_noverifytime(struct tls_config *config)
768 {
769 	config->verify_time = 0;
770 }
771 
772 void
773 tls_config_verify(struct tls_config *config)
774 {
775 	config->verify_cert = 1;
776 	config->verify_name = 1;
777 	config->verify_time = 1;
778 }
779 
780 void
781 tls_config_ocsp_require_stapling(struct tls_config *config)
782 {
783 	config->ocsp_require_stapling = 1;
784 }
785 
786 void
787 tls_config_verify_client(struct tls_config *config)
788 {
789 	config->verify_client = 1;
790 }
791 
792 void
793 tls_config_verify_client_optional(struct tls_config *config)
794 {
795 	config->verify_client = 2;
796 }
797 
798 void
799 tls_config_skip_private_key_check(struct tls_config *config)
800 {
801 	config->skip_private_key_check = 1;
802 }
803 
804 int
805 tls_config_set_ocsp_staple_file(struct tls_config *config, const char *staple_file)
806 {
807 	return tls_keypair_set_ocsp_staple_file(config->keypair, &config->error,
808 	    staple_file);
809 }
810 
811 int
812 tls_config_set_ocsp_staple_mem(struct tls_config *config, const uint8_t *staple,
813     size_t len)
814 {
815 	return tls_keypair_set_ocsp_staple_mem(config->keypair, &config->error,
816 	    staple, len);
817 }
818 
819 int
820 tls_config_set_session_id(struct tls_config *config,
821     const unsigned char *session_id, size_t len)
822 {
823 	if (len > TLS_MAX_SESSION_ID_LENGTH) {
824 		tls_config_set_errorx(config, "session ID too large");
825 		return (-1);
826 	}
827 	memset(config->session_id, 0, sizeof(config->session_id));
828 	memcpy(config->session_id, session_id, len);
829 	return (0);
830 }
831 
832 int
833 tls_config_set_session_lifetime(struct tls_config *config, int lifetime)
834 {
835 	if (lifetime > TLS_MAX_SESSION_TIMEOUT) {
836 		tls_config_set_errorx(config, "session lifetime too large");
837 		return (-1);
838 	}
839 	if (lifetime != 0 && lifetime < TLS_MIN_SESSION_TIMEOUT) {
840 		tls_config_set_errorx(config, "session lifetime too small");
841 		return (-1);
842 	}
843 
844 	config->session_lifetime = lifetime;
845 	return (0);
846 }
847 
848 int
849 tls_config_add_ticket_key(struct tls_config *config, uint32_t keyrev,
850     unsigned char *key, size_t keylen)
851 {
852 	struct tls_ticket_key newkey;
853 	int i;
854 
855 	if (TLS_TICKET_KEY_SIZE != keylen ||
856 	    sizeof(newkey.aes_key) + sizeof(newkey.hmac_key) > keylen) {
857 		tls_config_set_errorx(config,
858 		    "wrong amount of ticket key data");
859 		return (-1);
860 	}
861 
862 	keyrev = htonl(keyrev);
863 	memset(&newkey, 0, sizeof(newkey));
864 	memcpy(newkey.key_name, &keyrev, sizeof(keyrev));
865 	memcpy(newkey.aes_key, key, sizeof(newkey.aes_key));
866 	memcpy(newkey.hmac_key, key + sizeof(newkey.aes_key),
867 	    sizeof(newkey.hmac_key));
868 	newkey.time = time(NULL);
869 
870 	for (i = 0; i < TLS_NUM_TICKETS; i++) {
871 		struct tls_ticket_key *tk = &config->ticket_keys[i];
872 		if (memcmp(newkey.key_name, tk->key_name,
873 		    sizeof(tk->key_name)) != 0)
874 			continue;
875 
876 		/* allow re-entry of most recent key */
877 		if (i == 0 && memcmp(newkey.aes_key, tk->aes_key,
878 		    sizeof(tk->aes_key)) == 0 && memcmp(newkey.hmac_key,
879 		    tk->hmac_key, sizeof(tk->hmac_key)) == 0)
880 			return (0);
881 		tls_config_set_errorx(config, "ticket key already present");
882 		return (-1);
883 	}
884 
885 	memmove(&config->ticket_keys[1], &config->ticket_keys[0],
886 	    sizeof(config->ticket_keys) - sizeof(config->ticket_keys[0]));
887 	config->ticket_keys[0] = newkey;
888 
889 	config->ticket_autorekey = 0;
890 
891 	return (0);
892 }
893 
894 int
895 tls_config_ticket_autorekey(struct tls_config *config)
896 {
897 	unsigned char key[TLS_TICKET_KEY_SIZE];
898 	int rv;
899 
900 	arc4random_buf(key, sizeof(key));
901 	rv = tls_config_add_ticket_key(config, config->ticket_keyrev++, key,
902 	    sizeof(key));
903 	config->ticket_autorekey = 1;
904 	return (rv);
905 }
906