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source: vbox/trunk/src/libs/openssl-1.1.1l/ssl/ssl_conf.c@ 95000

Last change on this file since 95000 was 91772, checked in by vboxsync, 3 years ago

openssl-1.1.1l: Applied and adjusted our OpenSSL changes to 1.1.1l. bugref:10126
File size: 30.4 KB
Line 
1/*
2 * Copyright 2012-2020 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_local.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 /*
309 * Note: To avoid breaking previously valid configurations, we must retain
310 * legacy entries in this table even if the underlying protocol is no
311 * longer supported. This also means that the constants SSL3_VERSION, ...
312 * need to be retained indefinitely. This table can only grow, never
313 * shrink.
314 */
315 static const struct protocol_versions versions[] = {
316 {"None", 0},
317 {"SSLv3", SSL3_VERSION},
318 {"TLSv1", TLS1_VERSION},
319 {"TLSv1.1", TLS1_1_VERSION},
320 {"TLSv1.2", TLS1_2_VERSION},
321 {"TLSv1.3", TLS1_3_VERSION},
322 {"DTLSv1", DTLS1_VERSION},
323 {"DTLSv1.2", DTLS1_2_VERSION}
324 };
325 size_t i;
326 size_t n = OSSL_NELEM(versions);
327
328 for (i = 0; i < n; i++)
329 if (strcmp(versions[i].name, value) == 0)
330 return versions[i].version;
331 return -1;
332}
333
334static int min_max_proto(SSL_CONF_CTX *cctx, const char *value, int *bound)
335{
336 int method_version;
337 int new_version;
338
339 if (cctx->ctx != NULL)
340 method_version = cctx->ctx->method->version;
341 else if (cctx->ssl != NULL)
342 method_version = cctx->ssl->ctx->method->version;
343 else
344 return 0;
345 if ((new_version = protocol_from_string(value)) < 0)
346 return 0;
347 return ssl_set_version_bound(method_version, new_version, bound);
348}
349
350/*
351 * cmd_MinProtocol - Set min protocol version
352 * @cctx: config structure to save settings in
353 * @value: The min protocol version in string form
354 *
355 * Returns 1 on success and 0 on failure.
356 */
357static int cmd_MinProtocol(SSL_CONF_CTX *cctx, const char *value)
358{
359 return min_max_proto(cctx, value, cctx->min_version);
360}
361
362/*
363 * cmd_MaxProtocol - Set max protocol version
364 * @cctx: config structure to save settings in
365 * @value: The max protocol version in string form
366 *
367 * Returns 1 on success and 0 on failure.
368 */
369static int cmd_MaxProtocol(SSL_CONF_CTX *cctx, const char *value)
370{
371 return min_max_proto(cctx, value, cctx->max_version);
372}
373
374static int cmd_Options(SSL_CONF_CTX *cctx, const char *value)
375{
376 static const ssl_flag_tbl ssl_option_list[] = {
377 SSL_FLAG_TBL_INV("SessionTicket", SSL_OP_NO_TICKET),
378 SSL_FLAG_TBL_INV("EmptyFragments",
379 SSL_OP_DONT_INSERT_EMPTY_FRAGMENTS),
380 SSL_FLAG_TBL("Bugs", SSL_OP_ALL),
381 SSL_FLAG_TBL_INV("Compression", SSL_OP_NO_COMPRESSION),
382 SSL_FLAG_TBL_SRV("ServerPreference", SSL_OP_CIPHER_SERVER_PREFERENCE),
383 SSL_FLAG_TBL_SRV("NoResumptionOnRenegotiation",
384 SSL_OP_NO_SESSION_RESUMPTION_ON_RENEGOTIATION),
385 SSL_FLAG_TBL_SRV("DHSingle", SSL_OP_SINGLE_DH_USE),
386 SSL_FLAG_TBL_SRV("ECDHSingle", SSL_OP_SINGLE_ECDH_USE),
387 SSL_FLAG_TBL("UnsafeLegacyRenegotiation",
388 SSL_OP_ALLOW_UNSAFE_LEGACY_RENEGOTIATION),
389 SSL_FLAG_TBL_INV("EncryptThenMac", SSL_OP_NO_ENCRYPT_THEN_MAC),
390 SSL_FLAG_TBL("NoRenegotiation", SSL_OP_NO_RENEGOTIATION),
391 SSL_FLAG_TBL("AllowNoDHEKEX", SSL_OP_ALLOW_NO_DHE_KEX),
392 SSL_FLAG_TBL("PrioritizeChaCha", SSL_OP_PRIORITIZE_CHACHA),
393 SSL_FLAG_TBL("MiddleboxCompat", SSL_OP_ENABLE_MIDDLEBOX_COMPAT),
394 SSL_FLAG_TBL_INV("AntiReplay", SSL_OP_NO_ANTI_REPLAY)
395 };
396 if (value == NULL)
397 return -3;
398 cctx->tbl = ssl_option_list;
399 cctx->ntbl = OSSL_NELEM(ssl_option_list);
400 return CONF_parse_list(value, ',', 1, ssl_set_option_list, cctx);
401}
402
403static int cmd_VerifyMode(SSL_CONF_CTX *cctx, const char *value)
404{
405 static const ssl_flag_tbl ssl_vfy_list[] = {
406 SSL_FLAG_VFY_CLI("Peer", SSL_VERIFY_PEER),
407 SSL_FLAG_VFY_SRV("Request", SSL_VERIFY_PEER),
408 SSL_FLAG_VFY_SRV("Require",
409 SSL_VERIFY_PEER | SSL_VERIFY_FAIL_IF_NO_PEER_CERT),
410 SSL_FLAG_VFY_SRV("Once", SSL_VERIFY_PEER | SSL_VERIFY_CLIENT_ONCE),
411 SSL_FLAG_VFY_SRV("RequestPostHandshake",
412 SSL_VERIFY_PEER | SSL_VERIFY_POST_HANDSHAKE),
413 SSL_FLAG_VFY_SRV("RequirePostHandshake",
414 SSL_VERIFY_PEER | SSL_VERIFY_POST_HANDSHAKE |
415 SSL_VERIFY_FAIL_IF_NO_PEER_CERT),
416 };
417 if (value == NULL)
418 return -3;
419 cctx->tbl = ssl_vfy_list;
420 cctx->ntbl = OSSL_NELEM(ssl_vfy_list);
421 return CONF_parse_list(value, ',', 1, ssl_set_option_list, cctx);
422}
423
424static int cmd_Certificate(SSL_CONF_CTX *cctx, const char *value)
425{
426 int rv = 1;
427 CERT *c = NULL;
428 if (cctx->ctx) {
429 rv = SSL_CTX_use_certificate_chain_file(cctx->ctx, value);
430 c = cctx->ctx->cert;
431 }
432 if (cctx->ssl) {
433 rv = SSL_use_certificate_chain_file(cctx->ssl, value);
434 c = cctx->ssl->cert;
435 }
436 if (rv > 0 && c && cctx->flags & SSL_CONF_FLAG_REQUIRE_PRIVATE) {
437 char **pfilename = &cctx->cert_filename[c->key - c->pkeys];
438 OPENSSL_free(*pfilename);
439 *pfilename = OPENSSL_strdup(value);
440 if (!*pfilename)
441 rv = 0;
442 }
443
444 return rv > 0;
445}
446
447static int cmd_PrivateKey(SSL_CONF_CTX *cctx, const char *value)
448{
449 int rv = 1;
450 if (!(cctx->flags & SSL_CONF_FLAG_CERTIFICATE))
451 return -2;
452 if (cctx->ctx)
453 rv = SSL_CTX_use_PrivateKey_file(cctx->ctx, value, SSL_FILETYPE_PEM);
454 if (cctx->ssl)
455 rv = SSL_use_PrivateKey_file(cctx->ssl, value, SSL_FILETYPE_PEM);
456 return rv > 0;
457}
458
459static int cmd_ServerInfoFile(SSL_CONF_CTX *cctx, const char *value)
460{
461 int rv = 1;
462 if (cctx->ctx)
463 rv = SSL_CTX_use_serverinfo_file(cctx->ctx, value);
464 return rv > 0;
465}
466
467static int do_store(SSL_CONF_CTX *cctx,
468 const char *CAfile, const char *CApath, int verify_store)
469{
470 CERT *cert;
471 X509_STORE **st;
472 if (cctx->ctx)
473 cert = cctx->ctx->cert;
474 else if (cctx->ssl)
475 cert = cctx->ssl->cert;
476 else
477 return 1;
478 st = verify_store ? &cert->verify_store : &cert->chain_store;
479 if (*st == NULL) {
480 *st = X509_STORE_new();
481 if (*st == NULL)
482 return 0;
483 }
484 return X509_STORE_load_locations(*st, CAfile, CApath) > 0;
485}
486
487static int cmd_ChainCAPath(SSL_CONF_CTX *cctx, const char *value)
488{
489 return do_store(cctx, NULL, value, 0);
490}
491
492static int cmd_ChainCAFile(SSL_CONF_CTX *cctx, const char *value)
493{
494 return do_store(cctx, value, NULL, 0);
495}
496
497static int cmd_VerifyCAPath(SSL_CONF_CTX *cctx, const char *value)
498{
499 return do_store(cctx, NULL, value, 1);
500}
501
502static int cmd_VerifyCAFile(SSL_CONF_CTX *cctx, const char *value)
503{
504 return do_store(cctx, value, NULL, 1);
505}
506
507static int cmd_RequestCAFile(SSL_CONF_CTX *cctx, const char *value)
508{
509 if (cctx->canames == NULL)
510 cctx->canames = sk_X509_NAME_new_null();
511 if (cctx->canames == NULL)
512 return 0;
513 return SSL_add_file_cert_subjects_to_stack(cctx->canames, value);
514}
515
516static int cmd_ClientCAFile(SSL_CONF_CTX *cctx, const char *value)
517{
518 return cmd_RequestCAFile(cctx, value);
519}
520
521static int cmd_RequestCAPath(SSL_CONF_CTX *cctx, const char *value)
522{
523 if (cctx->canames == NULL)
524 cctx->canames = sk_X509_NAME_new_null();
525 if (cctx->canames == NULL)
526 return 0;
527 return SSL_add_dir_cert_subjects_to_stack(cctx->canames, value);
528}
529
530static int cmd_ClientCAPath(SSL_CONF_CTX *cctx, const char *value)
531{
532 return cmd_RequestCAPath(cctx, value);
533}
534
535#ifndef OPENSSL_NO_DH
536static int cmd_DHParameters(SSL_CONF_CTX *cctx, const char *value)
537{
538 int rv = 0;
539 DH *dh = NULL;
540 BIO *in = NULL;
541 if (cctx->ctx || cctx->ssl) {
542 in = BIO_new(BIO_s_file());
543 if (in == NULL)
544 goto end;
545 if (BIO_read_filename(in, value) <= 0)
546 goto end;
547 dh = PEM_read_bio_DHparams(in, NULL, NULL, NULL);
548 if (dh == NULL)
549 goto end;
550 } else
551 return 1;
552 if (cctx->ctx)
553 rv = SSL_CTX_set_tmp_dh(cctx->ctx, dh);
554 if (cctx->ssl)
555 rv = SSL_set_tmp_dh(cctx->ssl, dh);
556 end:
557 DH_free(dh);
558 BIO_free(in);
559 return rv > 0;
560}
561#endif
562
563static int cmd_RecordPadding(SSL_CONF_CTX *cctx, const char *value)
564{
565 int rv = 0;
566 int block_size = atoi(value);
567
568 /*
569 * All we care about is a non-negative value,
570 * the setters check the range
571 */
572 if (block_size >= 0) {
573 if (cctx->ctx)
574 rv = SSL_CTX_set_block_padding(cctx->ctx, block_size);
575 if (cctx->ssl)
576 rv = SSL_set_block_padding(cctx->ssl, block_size);
577 }
578 return rv;
579}
580
581
582static int cmd_NumTickets(SSL_CONF_CTX *cctx, const char *value)
583{
584 int rv = 0;
585 int num_tickets = atoi(value);
586
587 if (num_tickets >= 0) {
588 if (cctx->ctx)
589 rv = SSL_CTX_set_num_tickets(cctx->ctx, num_tickets);
590 if (cctx->ssl)
591 rv = SSL_set_num_tickets(cctx->ssl, num_tickets);
592 }
593 return rv;
594}
595
596typedef struct {
597 int (*cmd) (SSL_CONF_CTX *cctx, const char *value);
598 const char *str_file;
599 const char *str_cmdline;
600 unsigned short flags;
601 unsigned short value_type;
602} ssl_conf_cmd_tbl;
603
604/* Table of supported parameters */
605
606#define SSL_CONF_CMD(name, cmdopt, flags, type) \
607 {cmd_##name, #name, cmdopt, flags, type}
608
609#define SSL_CONF_CMD_STRING(name, cmdopt, flags) \
610 SSL_CONF_CMD(name, cmdopt, flags, SSL_CONF_TYPE_STRING)
611
612#define SSL_CONF_CMD_SWITCH(name, flags) \
613 {0, NULL, name, flags, SSL_CONF_TYPE_NONE}
614
615/* See apps/apps.h if you change this table. */
616static const ssl_conf_cmd_tbl ssl_conf_cmds[] = {
617 SSL_CONF_CMD_SWITCH("no_ssl3", 0),
618 SSL_CONF_CMD_SWITCH("no_tls1", 0),
619 SSL_CONF_CMD_SWITCH("no_tls1_1", 0),
620 SSL_CONF_CMD_SWITCH("no_tls1_2", 0),
621 SSL_CONF_CMD_SWITCH("no_tls1_3", 0),
622 SSL_CONF_CMD_SWITCH("bugs", 0),
623 SSL_CONF_CMD_SWITCH("no_comp", 0),
624 SSL_CONF_CMD_SWITCH("comp", 0),
625 SSL_CONF_CMD_SWITCH("ecdh_single", SSL_CONF_FLAG_SERVER),
626 SSL_CONF_CMD_SWITCH("no_ticket", 0),
627 SSL_CONF_CMD_SWITCH("serverpref", SSL_CONF_FLAG_SERVER),
628 SSL_CONF_CMD_SWITCH("legacy_renegotiation", 0),
629 SSL_CONF_CMD_SWITCH("legacy_server_connect", SSL_CONF_FLAG_SERVER),
630 SSL_CONF_CMD_SWITCH("no_renegotiation", 0),
631 SSL_CONF_CMD_SWITCH("no_resumption_on_reneg", SSL_CONF_FLAG_SERVER),
632 SSL_CONF_CMD_SWITCH("no_legacy_server_connect", SSL_CONF_FLAG_SERVER),
633 SSL_CONF_CMD_SWITCH("allow_no_dhe_kex", 0),
634 SSL_CONF_CMD_SWITCH("prioritize_chacha", SSL_CONF_FLAG_SERVER),
635 SSL_CONF_CMD_SWITCH("strict", 0),
636 SSL_CONF_CMD_SWITCH("no_middlebox", 0),
637 SSL_CONF_CMD_SWITCH("anti_replay", SSL_CONF_FLAG_SERVER),
638 SSL_CONF_CMD_SWITCH("no_anti_replay", SSL_CONF_FLAG_SERVER),
639 SSL_CONF_CMD_STRING(SignatureAlgorithms, "sigalgs", 0),
640 SSL_CONF_CMD_STRING(ClientSignatureAlgorithms, "client_sigalgs", 0),
641 SSL_CONF_CMD_STRING(Curves, "curves", 0),
642 SSL_CONF_CMD_STRING(Groups, "groups", 0),
643#ifndef OPENSSL_NO_EC
644 SSL_CONF_CMD_STRING(ECDHParameters, "named_curve", SSL_CONF_FLAG_SERVER),
645#endif
646 SSL_CONF_CMD_STRING(CipherString, "cipher", 0),
647 SSL_CONF_CMD_STRING(Ciphersuites, "ciphersuites", 0),
648 SSL_CONF_CMD_STRING(Protocol, NULL, 0),
649 SSL_CONF_CMD_STRING(MinProtocol, "min_protocol", 0),
650 SSL_CONF_CMD_STRING(MaxProtocol, "max_protocol", 0),
651 SSL_CONF_CMD_STRING(Options, NULL, 0),
652 SSL_CONF_CMD_STRING(VerifyMode, NULL, 0),
653 SSL_CONF_CMD(Certificate, "cert", SSL_CONF_FLAG_CERTIFICATE,
654 SSL_CONF_TYPE_FILE),
655 SSL_CONF_CMD(PrivateKey, "key", SSL_CONF_FLAG_CERTIFICATE,
656 SSL_CONF_TYPE_FILE),
657 SSL_CONF_CMD(ServerInfoFile, NULL,
658 SSL_CONF_FLAG_SERVER | SSL_CONF_FLAG_CERTIFICATE,
659 SSL_CONF_TYPE_FILE),
660 SSL_CONF_CMD(ChainCAPath, "chainCApath", SSL_CONF_FLAG_CERTIFICATE,
661 SSL_CONF_TYPE_DIR),
662 SSL_CONF_CMD(ChainCAFile, "chainCAfile", SSL_CONF_FLAG_CERTIFICATE,
663 SSL_CONF_TYPE_FILE),
664 SSL_CONF_CMD(VerifyCAPath, "verifyCApath", SSL_CONF_FLAG_CERTIFICATE,
665 SSL_CONF_TYPE_DIR),
666 SSL_CONF_CMD(VerifyCAFile, "verifyCAfile", SSL_CONF_FLAG_CERTIFICATE,
667 SSL_CONF_TYPE_FILE),
668 SSL_CONF_CMD(RequestCAFile, "requestCAFile", SSL_CONF_FLAG_CERTIFICATE,
669 SSL_CONF_TYPE_FILE),
670 SSL_CONF_CMD(ClientCAFile, NULL,
671 SSL_CONF_FLAG_SERVER | SSL_CONF_FLAG_CERTIFICATE,
672 SSL_CONF_TYPE_FILE),
673 SSL_CONF_CMD(RequestCAPath, NULL, SSL_CONF_FLAG_CERTIFICATE,
674 SSL_CONF_TYPE_DIR),
675 SSL_CONF_CMD(ClientCAPath, NULL,
676 SSL_CONF_FLAG_SERVER | SSL_CONF_FLAG_CERTIFICATE,
677 SSL_CONF_TYPE_DIR),
678#ifndef OPENSSL_NO_DH
679 SSL_CONF_CMD(DHParameters, "dhparam",
680 SSL_CONF_FLAG_SERVER | SSL_CONF_FLAG_CERTIFICATE,
681 SSL_CONF_TYPE_FILE),
682#endif
683 SSL_CONF_CMD_STRING(RecordPadding, "record_padding", 0),
684 SSL_CONF_CMD_STRING(NumTickets, "num_tickets", SSL_CONF_FLAG_SERVER),
685};
686
687/* Supported switches: must match order of switches in ssl_conf_cmds */
688static const ssl_switch_tbl ssl_cmd_switches[] = {
689 {SSL_OP_NO_SSLv3, 0}, /* no_ssl3 */
690 {SSL_OP_NO_TLSv1, 0}, /* no_tls1 */
691 {SSL_OP_NO_TLSv1_1, 0}, /* no_tls1_1 */
692 {SSL_OP_NO_TLSv1_2, 0}, /* no_tls1_2 */
693 {SSL_OP_NO_TLSv1_3, 0}, /* no_tls1_3 */
694 {SSL_OP_ALL, 0}, /* bugs */
695 {SSL_OP_NO_COMPRESSION, 0}, /* no_comp */
696 {SSL_OP_NO_COMPRESSION, SSL_TFLAG_INV}, /* comp */
697 {SSL_OP_SINGLE_ECDH_USE, 0}, /* ecdh_single */
698 {SSL_OP_NO_TICKET, 0}, /* no_ticket */
699 {SSL_OP_CIPHER_SERVER_PREFERENCE, 0}, /* serverpref */
700 /* legacy_renegotiation */
701 {SSL_OP_ALLOW_UNSAFE_LEGACY_RENEGOTIATION, 0},
702 /* legacy_server_connect */
703 {SSL_OP_LEGACY_SERVER_CONNECT, 0},
704 /* no_renegotiation */
705 {SSL_OP_NO_RENEGOTIATION, 0},
706 /* no_resumption_on_reneg */
707 {SSL_OP_NO_SESSION_RESUMPTION_ON_RENEGOTIATION, 0},
708 /* no_legacy_server_connect */
709 {SSL_OP_LEGACY_SERVER_CONNECT, SSL_TFLAG_INV},
710 /* allow_no_dhe_kex */
711 {SSL_OP_ALLOW_NO_DHE_KEX, 0},
712 /* chacha reprioritization */
713 {SSL_OP_PRIORITIZE_CHACHA, 0},
714 {SSL_CERT_FLAG_TLS_STRICT, SSL_TFLAG_CERT}, /* strict */
715 /* no_middlebox */
716 {SSL_OP_ENABLE_MIDDLEBOX_COMPAT, SSL_TFLAG_INV},
717 /* anti_replay */
718 {SSL_OP_NO_ANTI_REPLAY, SSL_TFLAG_INV},
719 /* no_anti_replay */
720 {SSL_OP_NO_ANTI_REPLAY, 0},
721};
722
723static int ssl_conf_cmd_skip_prefix(SSL_CONF_CTX *cctx, const char **pcmd)
724{
725 if (!pcmd || !*pcmd)
726 return 0;
727 /* If a prefix is set, check and skip */
728 if (cctx->prefix) {
729 if (strlen(*pcmd) <= cctx->prefixlen)
730 return 0;
731 if (cctx->flags & SSL_CONF_FLAG_CMDLINE &&
732 strncmp(*pcmd, cctx->prefix, cctx->prefixlen))
733 return 0;
734 if (cctx->flags & SSL_CONF_FLAG_FILE &&
735 strncasecmp(*pcmd, cctx->prefix, cctx->prefixlen))
736 return 0;
737 *pcmd += cctx->prefixlen;
738 } else if (cctx->flags & SSL_CONF_FLAG_CMDLINE) {
739 if (**pcmd != '-' || !(*pcmd)[1])
740 return 0;
741 *pcmd += 1;
742 }
743 return 1;
744}
745
746/* Determine if a command is allowed according to cctx flags */
747static int ssl_conf_cmd_allowed(SSL_CONF_CTX *cctx, const ssl_conf_cmd_tbl * t)
748{
749 unsigned int tfl = t->flags;
750 unsigned int cfl = cctx->flags;
751 if ((tfl & SSL_CONF_FLAG_SERVER) && !(cfl & SSL_CONF_FLAG_SERVER))
752 return 0;
753 if ((tfl & SSL_CONF_FLAG_CLIENT) && !(cfl & SSL_CONF_FLAG_CLIENT))
754 return 0;
755 if ((tfl & SSL_CONF_FLAG_CERTIFICATE)
756 && !(cfl & SSL_CONF_FLAG_CERTIFICATE))
757 return 0;
758 return 1;
759}
760
761static const ssl_conf_cmd_tbl *ssl_conf_cmd_lookup(SSL_CONF_CTX *cctx,
762 const char *cmd)
763{
764 const ssl_conf_cmd_tbl *t;
765 size_t i;
766 if (cmd == NULL)
767 return NULL;
768
769 /* Look for matching parameter name in table */
770 for (i = 0, t = ssl_conf_cmds; i < OSSL_NELEM(ssl_conf_cmds); i++, t++) {
771 if (ssl_conf_cmd_allowed(cctx, t)) {
772 if (cctx->flags & SSL_CONF_FLAG_CMDLINE) {
773 if (t->str_cmdline && strcmp(t->str_cmdline, cmd) == 0)
774 return t;
775 }
776 if (cctx->flags & SSL_CONF_FLAG_FILE) {
777 if (t->str_file && strcasecmp(t->str_file, cmd) == 0)
778 return t;
779 }
780 }
781 }
782 return NULL;
783}
784
785static int ctrl_switch_option(SSL_CONF_CTX *cctx, const ssl_conf_cmd_tbl * cmd)
786{
787 /* Find index of command in table */
788 size_t idx = cmd - ssl_conf_cmds;
789 const ssl_switch_tbl *scmd;
790 /* Sanity check index */
791 if (idx >= OSSL_NELEM(ssl_cmd_switches))
792 return 0;
793 /* Obtain switches entry with same index */
794 scmd = ssl_cmd_switches + idx;
795 ssl_set_option(cctx, scmd->name_flags, scmd->option_value, 1);
796 return 1;
797}
798
799int SSL_CONF_cmd(SSL_CONF_CTX *cctx, const char *cmd, const char *value)
800{
801 const ssl_conf_cmd_tbl *runcmd;
802 if (cmd == NULL) {
803 SSLerr(SSL_F_SSL_CONF_CMD, SSL_R_INVALID_NULL_CMD_NAME);
804 return 0;
805 }
806
807 if (!ssl_conf_cmd_skip_prefix(cctx, &cmd))
808 return -2;
809
810 runcmd = ssl_conf_cmd_lookup(cctx, cmd);
811
812 if (runcmd) {
813 int rv;
814 if (runcmd->value_type == SSL_CONF_TYPE_NONE) {
815 return ctrl_switch_option(cctx, runcmd);
816 }
817 if (value == NULL)
818 return -3;
819 rv = runcmd->cmd(cctx, value);
820 if (rv > 0)
821 return 2;
822 if (rv == -2)
823 return -2;
824 if (cctx->flags & SSL_CONF_FLAG_SHOW_ERRORS) {
825 SSLerr(SSL_F_SSL_CONF_CMD, SSL_R_BAD_VALUE);
826 ERR_add_error_data(4, "cmd=", cmd, ", value=", value);
827 }
828 return 0;
829 }
830
831 if (cctx->flags & SSL_CONF_FLAG_SHOW_ERRORS) {
832 SSLerr(SSL_F_SSL_CONF_CMD, SSL_R_UNKNOWN_CMD_NAME);
833 ERR_add_error_data(2, "cmd=", cmd);
834 }
835
836 return -2;
837}
838
839int SSL_CONF_cmd_argv(SSL_CONF_CTX *cctx, int *pargc, char ***pargv)
840{
841 int rv;
842 const char *arg = NULL, *argn;
843 if (pargc && *pargc == 0)
844 return 0;
845 if (!pargc || *pargc > 0)
846 arg = **pargv;
847 if (arg == NULL)
848 return 0;
849 if (!pargc || *pargc > 1)
850 argn = (*pargv)[1];
851 else
852 argn = NULL;
853 cctx->flags &= ~SSL_CONF_FLAG_FILE;
854 cctx->flags |= SSL_CONF_FLAG_CMDLINE;
855 rv = SSL_CONF_cmd(cctx, arg, argn);
856 if (rv > 0) {
857 /* Success: update pargc, pargv */
858 (*pargv) += rv;
859 if (pargc)
860 (*pargc) -= rv;
861 return rv;
862 }
863 /* Unknown switch: indicate no arguments processed */
864 if (rv == -2)
865 return 0;
866 /* Some error occurred processing command, return fatal error */
867 if (rv == 0)
868 return -1;
869 return rv;
870}
871
872int SSL_CONF_cmd_value_type(SSL_CONF_CTX *cctx, const char *cmd)
873{
874 if (ssl_conf_cmd_skip_prefix(cctx, &cmd)) {
875 const ssl_conf_cmd_tbl *runcmd;
876 runcmd = ssl_conf_cmd_lookup(cctx, cmd);
877 if (runcmd)
878 return runcmd->value_type;
879 }
880 return SSL_CONF_TYPE_UNKNOWN;
881}
882
883SSL_CONF_CTX *SSL_CONF_CTX_new(void)
884{
885 SSL_CONF_CTX *ret = OPENSSL_zalloc(sizeof(*ret));
886
887 return ret;
888}
889
890int SSL_CONF_CTX_finish(SSL_CONF_CTX *cctx)
891{
892 /* See if any certificates are missing private keys */
893 size_t i;
894 CERT *c = NULL;
895 if (cctx->ctx)
896 c = cctx->ctx->cert;
897 else if (cctx->ssl)
898 c = cctx->ssl->cert;
899 if (c && cctx->flags & SSL_CONF_FLAG_REQUIRE_PRIVATE) {
900 for (i = 0; i < SSL_PKEY_NUM; i++) {
901 const char *p = cctx->cert_filename[i];
902 /*
903 * If missing private key try to load one from certificate file
904 */
905 if (p && !c->pkeys[i].privatekey) {
906 if (!cmd_PrivateKey(cctx, p))
907 return 0;
908 }
909 }
910 }
911 if (cctx->canames) {
912 if (cctx->ssl)
913 SSL_set0_CA_list(cctx->ssl, cctx->canames);
914 else if (cctx->ctx)
915 SSL_CTX_set0_CA_list(cctx->ctx, cctx->canames);
916 else
917 sk_X509_NAME_pop_free(cctx->canames, X509_NAME_free);
918 cctx->canames = NULL;
919 }
920 return 1;
921}
922
923void SSL_CONF_CTX_free(SSL_CONF_CTX *cctx)
924{
925 if (cctx) {
926 size_t i;
927 for (i = 0; i < SSL_PKEY_NUM; i++)
928 OPENSSL_free(cctx->cert_filename[i]);
929 OPENSSL_free(cctx->prefix);
930 sk_X509_NAME_pop_free(cctx->canames, X509_NAME_free);
931 OPENSSL_free(cctx);
932 }
933}
934
935unsigned int SSL_CONF_CTX_set_flags(SSL_CONF_CTX *cctx, unsigned int flags)
936{
937 cctx->flags |= flags;
938 return cctx->flags;
939}
940
941unsigned int SSL_CONF_CTX_clear_flags(SSL_CONF_CTX *cctx, unsigned int flags)
942{
943 cctx->flags &= ~flags;
944 return cctx->flags;
945}
946
947int SSL_CONF_CTX_set1_prefix(SSL_CONF_CTX *cctx, const char *pre)
948{
949 char *tmp = NULL;
950 if (pre) {
951 tmp = OPENSSL_strdup(pre);
952 if (tmp == NULL)
953 return 0;
954 }
955 OPENSSL_free(cctx->prefix);
956 cctx->prefix = tmp;
957 if (tmp)
958 cctx->prefixlen = strlen(tmp);
959 else
960 cctx->prefixlen = 0;
961 return 1;
962}
963
964void SSL_CONF_CTX_set_ssl(SSL_CONF_CTX *cctx, SSL *ssl)
965{
966 cctx->ssl = ssl;
967 cctx->ctx = NULL;
968 if (ssl) {
969 cctx->poptions = &ssl->options;
970 cctx->min_version = &ssl->min_proto_version;
971 cctx->max_version = &ssl->max_proto_version;
972 cctx->pcert_flags = &ssl->cert->cert_flags;
973 cctx->pvfy_flags = &ssl->verify_mode;
974 } else {
975 cctx->poptions = NULL;
976 cctx->min_version = NULL;
977 cctx->max_version = NULL;
978 cctx->pcert_flags = NULL;
979 cctx->pvfy_flags = NULL;
980 }
981}
982
983void SSL_CONF_CTX_set_ssl_ctx(SSL_CONF_CTX *cctx, SSL_CTX *ctx)
984{
985 cctx->ctx = ctx;
986 cctx->ssl = NULL;
987 if (ctx) {
988 cctx->poptions = &ctx->options;
989 cctx->min_version = &ctx->min_proto_version;
990 cctx->max_version = &ctx->max_proto_version;
991 cctx->pcert_flags = &ctx->cert->cert_flags;
992 cctx->pvfy_flags = &ctx->verify_mode;
993 } else {
994 cctx->poptions = NULL;
995 cctx->min_version = NULL;
996 cctx->max_version = NULL;
997 cctx->pcert_flags = NULL;
998 cctx->pvfy_flags = NULL;
999 }
1000}
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