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Enable the ability to set the number of TLSv1.3 session tickets sent
[thirdparty/openssl.git] / ssl / ssl_conf.c
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1/*
2 * Copyright 2012-2018 The OpenSSL Project Authors. All Rights Reserved.
3 *
4 * Licensed under the OpenSSL license (the "License"). You may not use
5 * this file except in compliance with the License. You can obtain a copy
6 * in the file LICENSE in the source distribution or at
7 * https://www.openssl.org/source/license.html
8 */
9
10#include <stdio.h>
11#include "ssl_locl.h"
12#include <openssl/conf.h>
13#include <openssl/objects.h>
14#include <openssl/dh.h>
15#include "internal/nelem.h"
16
17/*
18 * structure holding name tables. This is used for permitted elements in lists
19 * such as TLSv1.
20 */
21
22typedef struct {
23 const char *name;
24 int namelen;
25 unsigned int name_flags;
26 unsigned long option_value;
27} ssl_flag_tbl;
28
29/* Switch table: use for single command line switches like no_tls2 */
30typedef struct {
31 unsigned long option_value;
32 unsigned int name_flags;
33} ssl_switch_tbl;
34
35/* Sense of name is inverted e.g. "TLSv1" will clear SSL_OP_NO_TLSv1 */
36#define SSL_TFLAG_INV 0x1
37/* Mask for type of flag referred to */
38#define SSL_TFLAG_TYPE_MASK 0xf00
39/* Flag is for options */
40#define SSL_TFLAG_OPTION 0x000
41/* Flag is for cert_flags */
42#define SSL_TFLAG_CERT 0x100
43/* Flag is for verify mode */
44#define SSL_TFLAG_VFY 0x200
45/* Option can only be used for clients */
46#define SSL_TFLAG_CLIENT SSL_CONF_FLAG_CLIENT
47/* Option can only be used for servers */
48#define SSL_TFLAG_SERVER SSL_CONF_FLAG_SERVER
49#define SSL_TFLAG_BOTH (SSL_TFLAG_CLIENT|SSL_TFLAG_SERVER)
50
51#define SSL_FLAG_TBL(str, flag) \
52 {str, (int)(sizeof(str) - 1), SSL_TFLAG_BOTH, flag}
53#define SSL_FLAG_TBL_SRV(str, flag) \
54 {str, (int)(sizeof(str) - 1), SSL_TFLAG_SERVER, flag}
55#define SSL_FLAG_TBL_CLI(str, flag) \
56 {str, (int)(sizeof(str) - 1), SSL_TFLAG_CLIENT, flag}
57#define SSL_FLAG_TBL_INV(str, flag) \
58 {str, (int)(sizeof(str) - 1), SSL_TFLAG_INV|SSL_TFLAG_BOTH, flag}
59#define SSL_FLAG_TBL_SRV_INV(str, flag) \
60 {str, (int)(sizeof(str) - 1), SSL_TFLAG_INV|SSL_TFLAG_SERVER, flag}
61#define SSL_FLAG_TBL_CERT(str, flag) \
62 {str, (int)(sizeof(str) - 1), SSL_TFLAG_CERT|SSL_TFLAG_BOTH, flag}
63
64#define SSL_FLAG_VFY_CLI(str, flag) \
65 {str, (int)(sizeof(str) - 1), SSL_TFLAG_VFY | SSL_TFLAG_CLIENT, flag}
66#define SSL_FLAG_VFY_SRV(str, flag) \
67 {str, (int)(sizeof(str) - 1), SSL_TFLAG_VFY | SSL_TFLAG_SERVER, flag}
68
69/*
70 * Opaque structure containing SSL configuration context.
71 */
72
73struct ssl_conf_ctx_st {
74 /*
75 * Various flags indicating (among other things) which options we will
76 * recognise.
77 */
78 unsigned int flags;
79 /* Prefix and length of commands */
80 char *prefix;
81 size_t prefixlen;
82 /* SSL_CTX or SSL structure to perform operations on */
83 SSL_CTX *ctx;
84 SSL *ssl;
85 /* Pointer to SSL or SSL_CTX options field or NULL if none */
86 uint32_t *poptions;
87 /* Certificate filenames for each type */
88 char *cert_filename[SSL_PKEY_NUM];
89 /* Pointer to SSL or SSL_CTX cert_flags or NULL if none */
90 uint32_t *pcert_flags;
91 /* Pointer to SSL or SSL_CTX verify_mode or NULL if none */
92 uint32_t *pvfy_flags;
93 /* Pointer to SSL or SSL_CTX min_version field or NULL if none */
94 int *min_version;
95 /* Pointer to SSL or SSL_CTX max_version field or NULL if none */
96 int *max_version;
97 /* Current flag table being worked on */
98 const ssl_flag_tbl *tbl;
99 /* Size of table */
100 size_t ntbl;
101 /* Client CA names */
102 STACK_OF(X509_NAME) *canames;
103};
104
105static void ssl_set_option(SSL_CONF_CTX *cctx, unsigned int name_flags,
106 unsigned long option_value, int onoff)
107{
108 uint32_t *pflags;
109 if (cctx->poptions == NULL)
110 return;
111 if (name_flags & SSL_TFLAG_INV)
112 onoff ^= 1;
113 switch (name_flags & SSL_TFLAG_TYPE_MASK) {
114
115 case SSL_TFLAG_CERT:
116 pflags = cctx->pcert_flags;
117 break;
118
119 case SSL_TFLAG_VFY:
120 pflags = cctx->pvfy_flags;
121 break;
122
123 case SSL_TFLAG_OPTION:
124 pflags = cctx->poptions;
125 break;
126
127 default:
128 return;
129
130 }
131 if (onoff)
132 *pflags |= option_value;
133 else
134 *pflags &= ~option_value;
135}
136
137static int ssl_match_option(SSL_CONF_CTX *cctx, const ssl_flag_tbl *tbl,
138 const char *name, int namelen, int onoff)
139{
140 /* If name not relevant for context skip */
141 if (!(cctx->flags & tbl->name_flags & SSL_TFLAG_BOTH))
142 return 0;
143 if (namelen == -1) {
144 if (strcmp(tbl->name, name))
145 return 0;
146 } else if (tbl->namelen != namelen || strncasecmp(tbl->name, name, namelen))
147 return 0;
148 ssl_set_option(cctx, tbl->name_flags, tbl->option_value, onoff);
149 return 1;
150}
151
152static int ssl_set_option_list(const char *elem, int len, void *usr)
153{
154 SSL_CONF_CTX *cctx = usr;
155 size_t i;
156 const ssl_flag_tbl *tbl;
157 int onoff = 1;
158 /*
159 * len == -1 indicates not being called in list context, just for single
160 * command line switches, so don't allow +, -.
161 */
162 if (elem == NULL)
163 return 0;
164 if (len != -1) {
165 if (*elem == '+') {
166 elem++;
167 len--;
168 onoff = 1;
169 } else if (*elem == '-') {
170 elem++;
171 len--;
172 onoff = 0;
173 }
174 }
175 for (i = 0, tbl = cctx->tbl; i < cctx->ntbl; i++, tbl++) {
176 if (ssl_match_option(cctx, tbl, elem, len, onoff))
177 return 1;
178 }
179 return 0;
180}
181
182/* Set supported signature algorithms */
183static int cmd_SignatureAlgorithms(SSL_CONF_CTX *cctx, const char *value)
184{
185 int rv;
186 if (cctx->ssl)
187 rv = SSL_set1_sigalgs_list(cctx->ssl, value);
188 /* NB: ctx == NULL performs syntax checking only */
189 else
190 rv = SSL_CTX_set1_sigalgs_list(cctx->ctx, value);
191 return rv > 0;
192}
193
194/* Set supported client signature algorithms */
195static int cmd_ClientSignatureAlgorithms(SSL_CONF_CTX *cctx, const char *value)
196{
197 int rv;
198 if (cctx->ssl)
199 rv = SSL_set1_client_sigalgs_list(cctx->ssl, value);
200 /* NB: ctx == NULL performs syntax checking only */
201 else
202 rv = SSL_CTX_set1_client_sigalgs_list(cctx->ctx, value);
203 return rv > 0;
204}
205
206static int cmd_Groups(SSL_CONF_CTX *cctx, const char *value)
207{
208 int rv;
209 if (cctx->ssl)
210 rv = SSL_set1_groups_list(cctx->ssl, value);
211 /* NB: ctx == NULL performs syntax checking only */
212 else
213 rv = SSL_CTX_set1_groups_list(cctx->ctx, value);
214 return rv > 0;
215}
216
217/* This is the old name for cmd_Groups - retained for backwards compatibility */
218static int cmd_Curves(SSL_CONF_CTX *cctx, const char *value)
219{
220 return cmd_Groups(cctx, value);
221}
222
223#ifndef OPENSSL_NO_EC
224/* ECDH temporary parameters */
225static int cmd_ECDHParameters(SSL_CONF_CTX *cctx, const char *value)
226{
227 int rv = 1;
228 EC_KEY *ecdh;
229 int nid;
230
231 /* Ignore values supported by 1.0.2 for the automatic selection */
232 if ((cctx->flags & SSL_CONF_FLAG_FILE)
233 && (strcasecmp(value, "+automatic") == 0
234 || strcasecmp(value, "automatic") == 0))
235 return 1;
236 if ((cctx->flags & SSL_CONF_FLAG_CMDLINE) &&
237 strcmp(value, "auto") == 0)
238 return 1;
239
240 nid = EC_curve_nist2nid(value);
241 if (nid == NID_undef)
242 nid = OBJ_sn2nid(value);
243 if (nid == 0)
244 return 0;
245 ecdh = EC_KEY_new_by_curve_name(nid);
246 if (!ecdh)
247 return 0;
248 if (cctx->ctx)
249 rv = SSL_CTX_set_tmp_ecdh(cctx->ctx, ecdh);
250 else if (cctx->ssl)
251 rv = SSL_set_tmp_ecdh(cctx->ssl, ecdh);
252 EC_KEY_free(ecdh);
253
254 return rv > 0;
255}
256#endif
257static int cmd_CipherString(SSL_CONF_CTX *cctx, const char *value)
258{
259 int rv = 1;
260
261 if (cctx->ctx)
262 rv = SSL_CTX_set_cipher_list(cctx->ctx, value);
263 if (cctx->ssl)
264 rv = SSL_set_cipher_list(cctx->ssl, value);
265 return rv > 0;
266}
267
268static int cmd_Ciphersuites(SSL_CONF_CTX *cctx, const char *value)
269{
270 int rv = 1;
271
272 if (cctx->ctx)
273 rv = SSL_CTX_set_ciphersuites(cctx->ctx, value);
274 if (cctx->ssl)
275 rv = SSL_set_ciphersuites(cctx->ssl, value);
276 return rv > 0;
277}
278
279static int cmd_Protocol(SSL_CONF_CTX *cctx, const char *value)
280{
281 static const ssl_flag_tbl ssl_protocol_list[] = {
282 SSL_FLAG_TBL_INV("ALL", SSL_OP_NO_SSL_MASK),
283 SSL_FLAG_TBL_INV("SSLv2", SSL_OP_NO_SSLv2),
284 SSL_FLAG_TBL_INV("SSLv3", SSL_OP_NO_SSLv3),
285 SSL_FLAG_TBL_INV("TLSv1", SSL_OP_NO_TLSv1),
286 SSL_FLAG_TBL_INV("TLSv1.1", SSL_OP_NO_TLSv1_1),
287 SSL_FLAG_TBL_INV("TLSv1.2", SSL_OP_NO_TLSv1_2),
288 SSL_FLAG_TBL_INV("TLSv1.3", SSL_OP_NO_TLSv1_3),
289 SSL_FLAG_TBL_INV("DTLSv1", SSL_OP_NO_DTLSv1),
290 SSL_FLAG_TBL_INV("DTLSv1.2", SSL_OP_NO_DTLSv1_2)
291 };
292 cctx->tbl = ssl_protocol_list;
293 cctx->ntbl = OSSL_NELEM(ssl_protocol_list);
294 return CONF_parse_list(value, ',', 1, ssl_set_option_list, cctx);
295}
296
297/*
298 * protocol_from_string - converts a protocol version string to a number
299 *
300 * Returns -1 on failure or the version on success
301 */
302static int protocol_from_string(const char *value)
303{
304 struct protocol_versions {
305 const char *name;
306 int version;
307 };
308 static const struct protocol_versions versions[] = {
309 {"None", 0},
310 {"SSLv3", SSL3_VERSION},
311 {"TLSv1", TLS1_VERSION},
312 {"TLSv1.1", TLS1_1_VERSION},
313 {"TLSv1.2", TLS1_2_VERSION},
314 {"TLSv1.3", TLS1_3_VERSION},
315 {"DTLSv1", DTLS1_VERSION},
316 {"DTLSv1.2", DTLS1_2_VERSION}
317 };
318 size_t i;
319 size_t n = OSSL_NELEM(versions);
320
321 for (i = 0; i < n; i++)
322 if (strcmp(versions[i].name, value) == 0)
323 return versions[i].version;
324 return -1;
325}
326
327static int min_max_proto(SSL_CONF_CTX *cctx, const char *value, int *bound)
328{
329 int method_version;
330 int new_version;
331
332 if (cctx->ctx != NULL)
333 method_version = cctx->ctx->method->version;
334 else if (cctx->ssl != NULL)
335 method_version = cctx->ssl->ctx->method->version;
336 else
337 return 0;
338 if ((new_version = protocol_from_string(value)) < 0)
339 return 0;
340 return ssl_set_version_bound(method_version, new_version, bound);
341}
342
343/*
344 * cmd_MinProtocol - Set min protocol version
345 * @cctx: config structure to save settings in
346 * @value: The min protocol version in string form
347 *
348 * Returns 1 on success and 0 on failure.
349 */
350static int cmd_MinProtocol(SSL_CONF_CTX *cctx, const char *value)
351{
352 return min_max_proto(cctx, value, cctx->min_version);
353}
354
355/*
356 * cmd_MaxProtocol - Set max protocol version
357 * @cctx: config structure to save settings in
358 * @value: The max protocol version in string form
359 *
360 * Returns 1 on success and 0 on failure.
361 */
362static int cmd_MaxProtocol(SSL_CONF_CTX *cctx, const char *value)
363{
364 return min_max_proto(cctx, value, cctx->max_version);
365}
366
367static int cmd_Options(SSL_CONF_CTX *cctx, const char *value)
368{
369 static const ssl_flag_tbl ssl_option_list[] = {
370 SSL_FLAG_TBL_INV("SessionTicket", SSL_OP_NO_TICKET),
371 SSL_FLAG_TBL_INV("EmptyFragments",
372 SSL_OP_DONT_INSERT_EMPTY_FRAGMENTS),
373 SSL_FLAG_TBL("Bugs", SSL_OP_ALL),
374 SSL_FLAG_TBL_INV("Compression", SSL_OP_NO_COMPRESSION),
375 SSL_FLAG_TBL_SRV("ServerPreference", SSL_OP_CIPHER_SERVER_PREFERENCE),
376 SSL_FLAG_TBL_SRV("NoResumptionOnRenegotiation",
377 SSL_OP_NO_SESSION_RESUMPTION_ON_RENEGOTIATION),
378 SSL_FLAG_TBL_SRV("DHSingle", SSL_OP_SINGLE_DH_USE),
379 SSL_FLAG_TBL_SRV("ECDHSingle", SSL_OP_SINGLE_ECDH_USE),
380 SSL_FLAG_TBL("UnsafeLegacyRenegotiation",
381 SSL_OP_ALLOW_UNSAFE_LEGACY_RENEGOTIATION),
382 SSL_FLAG_TBL_INV("EncryptThenMac", SSL_OP_NO_ENCRYPT_THEN_MAC),
383 SSL_FLAG_TBL("NoRenegotiation", SSL_OP_NO_RENEGOTIATION),
384 SSL_FLAG_TBL("AllowNoDHEKEX", SSL_OP_ALLOW_NO_DHE_KEX),
385 SSL_FLAG_TBL("PrioritizeChaCha", SSL_OP_PRIORITIZE_CHACHA),
386 SSL_FLAG_TBL("MiddleboxCompat", SSL_OP_ENABLE_MIDDLEBOX_COMPAT)
387 };
388 if (value == NULL)
389 return -3;
390 cctx->tbl = ssl_option_list;
391 cctx->ntbl = OSSL_NELEM(ssl_option_list);
392 return CONF_parse_list(value, ',', 1, ssl_set_option_list, cctx);
393}
394
395static int cmd_VerifyMode(SSL_CONF_CTX *cctx, const char *value)
396{
397 static const ssl_flag_tbl ssl_vfy_list[] = {
398 SSL_FLAG_VFY_CLI("Peer", SSL_VERIFY_PEER),
399 SSL_FLAG_VFY_SRV("Request", SSL_VERIFY_PEER),
400 SSL_FLAG_VFY_SRV("Require",
401 SSL_VERIFY_PEER | SSL_VERIFY_FAIL_IF_NO_PEER_CERT),
402 SSL_FLAG_VFY_SRV("Once", SSL_VERIFY_PEER | SSL_VERIFY_CLIENT_ONCE),
403 SSL_FLAG_VFY_SRV("RequestPostHandshake",
404 SSL_VERIFY_PEER | SSL_VERIFY_POST_HANDSHAKE),
405 SSL_FLAG_VFY_SRV("RequirePostHandshake",
406 SSL_VERIFY_PEER | SSL_VERIFY_POST_HANDSHAKE |
407 SSL_VERIFY_FAIL_IF_NO_PEER_CERT),
408 };
409 if (value == NULL)
410 return -3;
411 cctx->tbl = ssl_vfy_list;
412 cctx->ntbl = OSSL_NELEM(ssl_vfy_list);
413 return CONF_parse_list(value, ',', 1, ssl_set_option_list, cctx);
414}
415
416static int cmd_Certificate(SSL_CONF_CTX *cctx, const char *value)
417{
418 int rv = 1;
419 CERT *c = NULL;
420 if (cctx->ctx) {
421 rv = SSL_CTX_use_certificate_chain_file(cctx->ctx, value);
422 c = cctx->ctx->cert;
423 }
424 if (cctx->ssl) {
425 rv = SSL_use_certificate_chain_file(cctx->ssl, value);
426 c = cctx->ssl->cert;
427 }
428 if (rv > 0 && c && cctx->flags & SSL_CONF_FLAG_REQUIRE_PRIVATE) {
429 char **pfilename = &cctx->cert_filename[c->key - c->pkeys];
430 OPENSSL_free(*pfilename);
431 *pfilename = OPENSSL_strdup(value);
432 if (!*pfilename)
433 rv = 0;
434 }
435
436 return rv > 0;
437}
438
439static int cmd_PrivateKey(SSL_CONF_CTX *cctx, const char *value)
440{
441 int rv = 1;
442 if (!(cctx->flags & SSL_CONF_FLAG_CERTIFICATE))
443 return -2;
444 if (cctx->ctx)
445 rv = SSL_CTX_use_PrivateKey_file(cctx->ctx, value, SSL_FILETYPE_PEM);
446 if (cctx->ssl)
447 rv = SSL_use_PrivateKey_file(cctx->ssl, value, SSL_FILETYPE_PEM);
448 return rv > 0;
449}
450
451static int cmd_ServerInfoFile(SSL_CONF_CTX *cctx, const char *value)
452{
453 int rv = 1;
454 if (cctx->ctx)
455 rv = SSL_CTX_use_serverinfo_file(cctx->ctx, value);
456 return rv > 0;
457}
458
459static int do_store(SSL_CONF_CTX *cctx,
460 const char *CAfile, const char *CApath, int verify_store)
461{
462 CERT *cert;
463 X509_STORE **st;
464 if (cctx->ctx)
465 cert = cctx->ctx->cert;
466 else if (cctx->ssl)
467 cert = cctx->ssl->cert;
468 else
469 return 1;
470 st = verify_store ? &cert->verify_store : &cert->chain_store;
471 if (*st == NULL) {
472 *st = X509_STORE_new();
473 if (*st == NULL)
474 return 0;
475 }
476 return X509_STORE_load_locations(*st, CAfile, CApath) > 0;
477}
478
479static int cmd_ChainCAPath(SSL_CONF_CTX *cctx, const char *value)
480{
481 return do_store(cctx, NULL, value, 0);
482}
483
484static int cmd_ChainCAFile(SSL_CONF_CTX *cctx, const char *value)
485{
486 return do_store(cctx, value, NULL, 0);
487}
488
489static int cmd_VerifyCAPath(SSL_CONF_CTX *cctx, const char *value)
490{
491 return do_store(cctx, NULL, value, 1);
492}
493
494static int cmd_VerifyCAFile(SSL_CONF_CTX *cctx, const char *value)
495{
496 return do_store(cctx, value, NULL, 1);
497}
498
499static int cmd_RequestCAFile(SSL_CONF_CTX *cctx, const char *value)
500{
501 if (cctx->canames == NULL)
502 cctx->canames = sk_X509_NAME_new_null();
503 if (cctx->canames == NULL)
504 return 0;
505 return SSL_add_file_cert_subjects_to_stack(cctx->canames, value);
506}
507
508static int cmd_ClientCAFile(SSL_CONF_CTX *cctx, const char *value)
509{
510 return cmd_RequestCAFile(cctx, value);
511}
512
513static int cmd_RequestCAPath(SSL_CONF_CTX *cctx, const char *value)
514{
515 if (cctx->canames == NULL)
516 cctx->canames = sk_X509_NAME_new_null();
517 if (cctx->canames == NULL)
518 return 0;
519 return SSL_add_dir_cert_subjects_to_stack(cctx->canames, value);
520}
521
522static int cmd_ClientCAPath(SSL_CONF_CTX *cctx, const char *value)
523{
524 return cmd_RequestCAPath(cctx, value);
525}
526
527#ifndef OPENSSL_NO_DH
528static int cmd_DHParameters(SSL_CONF_CTX *cctx, const char *value)
529{
530 int rv = 0;
531 DH *dh = NULL;
532 BIO *in = NULL;
533 if (cctx->ctx || cctx->ssl) {
534 in = BIO_new(BIO_s_file());
535 if (in == NULL)
536 goto end;
537 if (BIO_read_filename(in, value) <= 0)
538 goto end;
539 dh = PEM_read_bio_DHparams(in, NULL, NULL, NULL);
540 if (dh == NULL)
541 goto end;
542 } else
543 return 1;
544 if (cctx->ctx)
545 rv = SSL_CTX_set_tmp_dh(cctx->ctx, dh);
546 if (cctx->ssl)
547 rv = SSL_set_tmp_dh(cctx->ssl, dh);
548 end:
549 DH_free(dh);
550 BIO_free(in);
551 return rv > 0;
552}
553#endif
554
555static int cmd_RecordPadding(SSL_CONF_CTX *cctx, const char *value)
556{
557 int rv = 0;
558 int block_size = atoi(value);
559
560 /*
561 * All we care about is a non-negative value,
562 * the setters check the range
563 */
564 if (block_size >= 0) {
565 if (cctx->ctx)
566 rv = SSL_CTX_set_block_padding(cctx->ctx, block_size);
567 if (cctx->ssl)
568 rv = SSL_set_block_padding(cctx->ssl, block_size);
569 }
570 return rv;
571}
572
573typedef struct {
574 int (*cmd) (SSL_CONF_CTX *cctx, const char *value);
575 const char *str_file;
576 const char *str_cmdline;
577 unsigned short flags;
578 unsigned short value_type;
579} ssl_conf_cmd_tbl;
580
581/* Table of supported parameters */
582
583#define SSL_CONF_CMD(name, cmdopt, flags, type) \
584 {cmd_##name, #name, cmdopt, flags, type}
585
586#define SSL_CONF_CMD_STRING(name, cmdopt, flags) \
587 SSL_CONF_CMD(name, cmdopt, flags, SSL_CONF_TYPE_STRING)
588
589#define SSL_CONF_CMD_SWITCH(name, flags) \
590 {0, NULL, name, flags, SSL_CONF_TYPE_NONE}
591
592/* See apps/apps.h if you change this table. */
593static const ssl_conf_cmd_tbl ssl_conf_cmds[] = {
594 SSL_CONF_CMD_SWITCH("no_ssl3", 0),
595 SSL_CONF_CMD_SWITCH("no_tls1", 0),
596 SSL_CONF_CMD_SWITCH("no_tls1_1", 0),
597 SSL_CONF_CMD_SWITCH("no_tls1_2", 0),
598 SSL_CONF_CMD_SWITCH("no_tls1_3", 0),
599 SSL_CONF_CMD_SWITCH("bugs", 0),
600 SSL_CONF_CMD_SWITCH("no_comp", 0),
601 SSL_CONF_CMD_SWITCH("comp", 0),
602 SSL_CONF_CMD_SWITCH("ecdh_single", SSL_CONF_FLAG_SERVER),
603 SSL_CONF_CMD_SWITCH("no_ticket", 0),
604 SSL_CONF_CMD_SWITCH("serverpref", SSL_CONF_FLAG_SERVER),
605 SSL_CONF_CMD_SWITCH("legacy_renegotiation", 0),
606 SSL_CONF_CMD_SWITCH("legacy_server_connect", SSL_CONF_FLAG_SERVER),
607 SSL_CONF_CMD_SWITCH("no_renegotiation", 0),
608 SSL_CONF_CMD_SWITCH("no_resumption_on_reneg", SSL_CONF_FLAG_SERVER),
609 SSL_CONF_CMD_SWITCH("no_legacy_server_connect", SSL_CONF_FLAG_SERVER),
610 SSL_CONF_CMD_SWITCH("allow_no_dhe_kex", 0),
611 SSL_CONF_CMD_SWITCH("prioritize_chacha", SSL_CONF_FLAG_SERVER),
612 SSL_CONF_CMD_SWITCH("strict", 0),
613 SSL_CONF_CMD_SWITCH("no_middlebox", 0),
614 SSL_CONF_CMD_STRING(SignatureAlgorithms, "sigalgs", 0),
615 SSL_CONF_CMD_STRING(ClientSignatureAlgorithms, "client_sigalgs", 0),
616 SSL_CONF_CMD_STRING(Curves, "curves", 0),
617 SSL_CONF_CMD_STRING(Groups, "groups", 0),
618#ifndef OPENSSL_NO_EC
619 SSL_CONF_CMD_STRING(ECDHParameters, "named_curve", SSL_CONF_FLAG_SERVER),
620#endif
621 SSL_CONF_CMD_STRING(CipherString, "cipher", 0),
622 SSL_CONF_CMD_STRING(Ciphersuites, "ciphersuites", 0),
623 SSL_CONF_CMD_STRING(Protocol, NULL, 0),
624 SSL_CONF_CMD_STRING(MinProtocol, "min_protocol", 0),
625 SSL_CONF_CMD_STRING(MaxProtocol, "max_protocol", 0),
626 SSL_CONF_CMD_STRING(Options, NULL, 0),
627 SSL_CONF_CMD_STRING(VerifyMode, NULL, 0),
628 SSL_CONF_CMD(Certificate, "cert", SSL_CONF_FLAG_CERTIFICATE,
629 SSL_CONF_TYPE_FILE),
630 SSL_CONF_CMD(PrivateKey, "key", SSL_CONF_FLAG_CERTIFICATE,
631 SSL_CONF_TYPE_FILE),
632 SSL_CONF_CMD(ServerInfoFile, NULL,
633 SSL_CONF_FLAG_SERVER | SSL_CONF_FLAG_CERTIFICATE,
634 SSL_CONF_TYPE_FILE),
635 SSL_CONF_CMD(ChainCAPath, "chainCApath", SSL_CONF_FLAG_CERTIFICATE,
636 SSL_CONF_TYPE_DIR),
637 SSL_CONF_CMD(ChainCAFile, "chainCAfile", SSL_CONF_FLAG_CERTIFICATE,
638 SSL_CONF_TYPE_FILE),
639 SSL_CONF_CMD(VerifyCAPath, "verifyCApath", SSL_CONF_FLAG_CERTIFICATE,
640 SSL_CONF_TYPE_DIR),
641 SSL_CONF_CMD(VerifyCAFile, "verifyCAfile", SSL_CONF_FLAG_CERTIFICATE,
642 SSL_CONF_TYPE_FILE),
643 SSL_CONF_CMD(RequestCAFile, "requestCAFile", SSL_CONF_FLAG_CERTIFICATE,
644 SSL_CONF_TYPE_FILE),
645 SSL_CONF_CMD(ClientCAFile, NULL,
646 SSL_CONF_FLAG_SERVER | SSL_CONF_FLAG_CERTIFICATE,
647 SSL_CONF_TYPE_FILE),
648 SSL_CONF_CMD(RequestCAPath, NULL, SSL_CONF_FLAG_CERTIFICATE,
649 SSL_CONF_TYPE_DIR),
650 SSL_CONF_CMD(ClientCAPath, NULL,
651 SSL_CONF_FLAG_SERVER | SSL_CONF_FLAG_CERTIFICATE,
652 SSL_CONF_TYPE_DIR),
653#ifndef OPENSSL_NO_DH
654 SSL_CONF_CMD(DHParameters, "dhparam",
655 SSL_CONF_FLAG_SERVER | SSL_CONF_FLAG_CERTIFICATE,
656 SSL_CONF_TYPE_FILE),
657#endif
658 SSL_CONF_CMD_STRING(RecordPadding, "record_padding", 0)
659};
660
661/* Supported switches: must match order of switches in ssl_conf_cmds */
662static const ssl_switch_tbl ssl_cmd_switches[] = {
663 {SSL_OP_NO_SSLv3, 0}, /* no_ssl3 */
664 {SSL_OP_NO_TLSv1, 0}, /* no_tls1 */
665 {SSL_OP_NO_TLSv1_1, 0}, /* no_tls1_1 */
666 {SSL_OP_NO_TLSv1_2, 0}, /* no_tls1_2 */
667 {SSL_OP_NO_TLSv1_3, 0}, /* no_tls1_3 */
668 {SSL_OP_ALL, 0}, /* bugs */
669 {SSL_OP_NO_COMPRESSION, 0}, /* no_comp */
670 {SSL_OP_NO_COMPRESSION, SSL_TFLAG_INV}, /* comp */
671 {SSL_OP_SINGLE_ECDH_USE, 0}, /* ecdh_single */
672 {SSL_OP_NO_TICKET, 0}, /* no_ticket */
673 {SSL_OP_CIPHER_SERVER_PREFERENCE, 0}, /* serverpref */
674 /* legacy_renegotiation */
675 {SSL_OP_ALLOW_UNSAFE_LEGACY_RENEGOTIATION, 0},
676 /* legacy_server_connect */
677 {SSL_OP_LEGACY_SERVER_CONNECT, 0},
678 /* no_renegotiation */
679 {SSL_OP_NO_RENEGOTIATION, 0},
680 /* no_resumption_on_reneg */
681 {SSL_OP_NO_SESSION_RESUMPTION_ON_RENEGOTIATION, 0},
682 /* no_legacy_server_connect */
683 {SSL_OP_LEGACY_SERVER_CONNECT, SSL_TFLAG_INV},
684 /* allow_no_dhe_kex */
685 {SSL_OP_ALLOW_NO_DHE_KEX, 0},
686 /* chacha reprioritization */
687 {SSL_OP_PRIORITIZE_CHACHA, 0},
688 {SSL_CERT_FLAG_TLS_STRICT, SSL_TFLAG_CERT}, /* strict */
689 /* no_middlebox */
690 {SSL_OP_ENABLE_MIDDLEBOX_COMPAT, SSL_TFLAG_INV},
691};
692
693static int ssl_conf_cmd_skip_prefix(SSL_CONF_CTX *cctx, const char **pcmd)
694{
695 if (!pcmd || !*pcmd)
696 return 0;
697 /* If a prefix is set, check and skip */
698 if (cctx->prefix) {
699 if (strlen(*pcmd) <= cctx->prefixlen)
700 return 0;
701 if (cctx->flags & SSL_CONF_FLAG_CMDLINE &&
702 strncmp(*pcmd, cctx->prefix, cctx->prefixlen))
703 return 0;
704 if (cctx->flags & SSL_CONF_FLAG_FILE &&
705 strncasecmp(*pcmd, cctx->prefix, cctx->prefixlen))
706 return 0;
707 *pcmd += cctx->prefixlen;
708 } else if (cctx->flags & SSL_CONF_FLAG_CMDLINE) {
709 if (**pcmd != '-' || !(*pcmd)[1])
710 return 0;
711 *pcmd += 1;
712 }
713 return 1;
714}
715
716/* Determine if a command is allowed according to cctx flags */
717static int ssl_conf_cmd_allowed(SSL_CONF_CTX *cctx, const ssl_conf_cmd_tbl * t)
718{
719 unsigned int tfl = t->flags;
720 unsigned int cfl = cctx->flags;
721 if ((tfl & SSL_CONF_FLAG_SERVER) && !(cfl & SSL_CONF_FLAG_SERVER))
722 return 0;
723 if ((tfl & SSL_CONF_FLAG_CLIENT) && !(cfl & SSL_CONF_FLAG_CLIENT))
724 return 0;
725 if ((tfl & SSL_CONF_FLAG_CERTIFICATE)
726 && !(cfl & SSL_CONF_FLAG_CERTIFICATE))
727 return 0;
728 return 1;
729}
730
731static const ssl_conf_cmd_tbl *ssl_conf_cmd_lookup(SSL_CONF_CTX *cctx,
732 const char *cmd)
733{
734 const ssl_conf_cmd_tbl *t;
735 size_t i;
736 if (cmd == NULL)
737 return NULL;
738
739 /* Look for matching parameter name in table */
740 for (i = 0, t = ssl_conf_cmds; i < OSSL_NELEM(ssl_conf_cmds); i++, t++) {
741 if (ssl_conf_cmd_allowed(cctx, t)) {
742 if (cctx->flags & SSL_CONF_FLAG_CMDLINE) {
743 if (t->str_cmdline && strcmp(t->str_cmdline, cmd) == 0)
744 return t;
745 }
746 if (cctx->flags & SSL_CONF_FLAG_FILE) {
747 if (t->str_file && strcasecmp(t->str_file, cmd) == 0)
748 return t;
749 }
750 }
751 }
752 return NULL;
753}
754
755static int ctrl_switch_option(SSL_CONF_CTX *cctx, const ssl_conf_cmd_tbl * cmd)
756{
757 /* Find index of command in table */
758 size_t idx = cmd - ssl_conf_cmds;
759 const ssl_switch_tbl *scmd;
760 /* Sanity check index */
761 if (idx >= OSSL_NELEM(ssl_cmd_switches))
762 return 0;
763 /* Obtain switches entry with same index */
764 scmd = ssl_cmd_switches + idx;
765 ssl_set_option(cctx, scmd->name_flags, scmd->option_value, 1);
766 return 1;
767}
768
769int SSL_CONF_cmd(SSL_CONF_CTX *cctx, const char *cmd, const char *value)
770{
771 const ssl_conf_cmd_tbl *runcmd;
772 if (cmd == NULL) {
773 SSLerr(SSL_F_SSL_CONF_CMD, SSL_R_INVALID_NULL_CMD_NAME);
774 return 0;
775 }
776
777 if (!ssl_conf_cmd_skip_prefix(cctx, &cmd))
778 return -2;
779
780 runcmd = ssl_conf_cmd_lookup(cctx, cmd);
781
782 if (runcmd) {
783 int rv;
784 if (runcmd->value_type == SSL_CONF_TYPE_NONE) {
785 return ctrl_switch_option(cctx, runcmd);
786 }
787 if (value == NULL)
788 return -3;
789 rv = runcmd->cmd(cctx, value);
790 if (rv > 0)
791 return 2;
792 if (rv == -2)
793 return -2;
794 if (cctx->flags & SSL_CONF_FLAG_SHOW_ERRORS) {
795 SSLerr(SSL_F_SSL_CONF_CMD, SSL_R_BAD_VALUE);
796 ERR_add_error_data(4, "cmd=", cmd, ", value=", value);
797 }
798 return 0;
799 }
800
801 if (cctx->flags & SSL_CONF_FLAG_SHOW_ERRORS) {
802 SSLerr(SSL_F_SSL_CONF_CMD, SSL_R_UNKNOWN_CMD_NAME);
803 ERR_add_error_data(2, "cmd=", cmd);
804 }
805
806 return -2;
807}
808
809int SSL_CONF_cmd_argv(SSL_CONF_CTX *cctx, int *pargc, char ***pargv)
810{
811 int rv;
812 const char *arg = NULL, *argn;
813 if (pargc && *pargc == 0)
814 return 0;
815 if (!pargc || *pargc > 0)
816 arg = **pargv;
817 if (arg == NULL)
818 return 0;
819 if (!pargc || *pargc > 1)
820 argn = (*pargv)[1];
821 else
822 argn = NULL;
823 cctx->flags &= ~SSL_CONF_FLAG_FILE;
824 cctx->flags |= SSL_CONF_FLAG_CMDLINE;
825 rv = SSL_CONF_cmd(cctx, arg, argn);
826 if (rv > 0) {
827 /* Success: update pargc, pargv */
828 (*pargv) += rv;
829 if (pargc)
830 (*pargc) -= rv;
831 return rv;
832 }
833 /* Unknown switch: indicate no arguments processed */
834 if (rv == -2)
835 return 0;
836 /* Some error occurred processing command, return fatal error */
837 if (rv == 0)
838 return -1;
839 return rv;
840}
841
842int SSL_CONF_cmd_value_type(SSL_CONF_CTX *cctx, const char *cmd)
843{
844 if (ssl_conf_cmd_skip_prefix(cctx, &cmd)) {
845 const ssl_conf_cmd_tbl *runcmd;
846 runcmd = ssl_conf_cmd_lookup(cctx, cmd);
847 if (runcmd)
848 return runcmd->value_type;
849 }
850 return SSL_CONF_TYPE_UNKNOWN;
851}
852
853SSL_CONF_CTX *SSL_CONF_CTX_new(void)
854{
855 SSL_CONF_CTX *ret = OPENSSL_zalloc(sizeof(*ret));
856
857 return ret;
858}
859
860int SSL_CONF_CTX_finish(SSL_CONF_CTX *cctx)
861{
862 /* See if any certificates are missing private keys */
863 size_t i;
864 CERT *c = NULL;
865 if (cctx->ctx)
866 c = cctx->ctx->cert;
867 else if (cctx->ssl)
868 c = cctx->ssl->cert;
869 if (c && cctx->flags & SSL_CONF_FLAG_REQUIRE_PRIVATE) {
870 for (i = 0; i < SSL_PKEY_NUM; i++) {
871 const char *p = cctx->cert_filename[i];
872 /*
873 * If missing private key try to load one from certificate file
874 */
875 if (p && !c->pkeys[i].privatekey) {
876 if (!cmd_PrivateKey(cctx, p))
877 return 0;
878 }
879 }
880 }
881 if (cctx->canames) {
882 if (cctx->ssl)
883 SSL_set0_CA_list(cctx->ssl, cctx->canames);
884 else if (cctx->ctx)
885 SSL_CTX_set0_CA_list(cctx->ctx, cctx->canames);
886 else
887 sk_X509_NAME_pop_free(cctx->canames, X509_NAME_free);
888 cctx->canames = NULL;
889 }
890 return 1;
891}
892
893void SSL_CONF_CTX_free(SSL_CONF_CTX *cctx)
894{
895 if (cctx) {
896 size_t i;
897 for (i = 0; i < SSL_PKEY_NUM; i++)
898 OPENSSL_free(cctx->cert_filename[i]);
899 OPENSSL_free(cctx->prefix);
900 sk_X509_NAME_pop_free(cctx->canames, X509_NAME_free);
901 OPENSSL_free(cctx);
902 }
903}
904
905unsigned int SSL_CONF_CTX_set_flags(SSL_CONF_CTX *cctx, unsigned int flags)
906{
907 cctx->flags |= flags;
908 return cctx->flags;
909}
910
911unsigned int SSL_CONF_CTX_clear_flags(SSL_CONF_CTX *cctx, unsigned int flags)
912{
913 cctx->flags &= ~flags;
914 return cctx->flags;
915}
916
917int SSL_CONF_CTX_set1_prefix(SSL_CONF_CTX *cctx, const char *pre)
918{
919 char *tmp = NULL;
920 if (pre) {
921 tmp = OPENSSL_strdup(pre);
922 if (tmp == NULL)
923 return 0;
924 }
925 OPENSSL_free(cctx->prefix);
926 cctx->prefix = tmp;
927 if (tmp)
928 cctx->prefixlen = strlen(tmp);
929 else
930 cctx->prefixlen = 0;
931 return 1;
932}
933
934void SSL_CONF_CTX_set_ssl(SSL_CONF_CTX *cctx, SSL *ssl)
935{
936 cctx->ssl = ssl;
937 cctx->ctx = NULL;
938 if (ssl) {
939 cctx->poptions = &ssl->options;
940 cctx->min_version = &ssl->min_proto_version;
941 cctx->max_version = &ssl->max_proto_version;
942 cctx->pcert_flags = &ssl->cert->cert_flags;
943 cctx->pvfy_flags = &ssl->verify_mode;
944 } else {
945 cctx->poptions = NULL;
946 cctx->min_version = NULL;
947 cctx->max_version = NULL;
948 cctx->pcert_flags = NULL;
949 cctx->pvfy_flags = NULL;
950 }
951}
952
953void SSL_CONF_CTX_set_ssl_ctx(SSL_CONF_CTX *cctx, SSL_CTX *ctx)
954{
955 cctx->ctx = ctx;
956 cctx->ssl = NULL;
957 if (ctx) {
958 cctx->poptions = &ctx->options;
959 cctx->min_version = &ctx->min_proto_version;
960 cctx->max_version = &ctx->max_proto_version;
961 cctx->pcert_flags = &ctx->cert->cert_flags;
962 cctx->pvfy_flags = &ctx->verify_mode;
963 } else {
964 cctx->poptions = NULL;
965 cctx->min_version = NULL;
966 cctx->max_version = NULL;
967 cctx->pcert_flags = NULL;
968 cctx->pvfy_flags = NULL;
969 }
970}
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