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1.8 ! jsing 1: /* $OpenBSD: s_cb.c,v 1.7 2016/12/30 17:25:48 jsing Exp $ */
1.1 jsing 2: /* Copyright (C) 1995-1998 Eric Young (eay@cryptsoft.com)
3: * All rights reserved.
4: *
5: * This package is an SSL implementation written
6: * by Eric Young (eay@cryptsoft.com).
7: * The implementation was written so as to conform with Netscapes SSL.
8: *
9: * This library is free for commercial and non-commercial use as long as
10: * the following conditions are aheared to. The following conditions
11: * apply to all code found in this distribution, be it the RC4, RSA,
12: * lhash, DES, etc., code; not just the SSL code. The SSL documentation
13: * included with this distribution is covered by the same copyright terms
14: * except that the holder is Tim Hudson (tjh@cryptsoft.com).
15: *
16: * Copyright remains Eric Young's, and as such any Copyright notices in
17: * the code are not to be removed.
18: * If this package is used in a product, Eric Young should be given attribution
19: * as the author of the parts of the library used.
20: * This can be in the form of a textual message at program startup or
21: * in documentation (online or textual) provided with the package.
22: *
23: * Redistribution and use in source and binary forms, with or without
24: * modification, are permitted provided that the following conditions
25: * are met:
26: * 1. Redistributions of source code must retain the copyright
27: * notice, this list of conditions and the following disclaimer.
28: * 2. Redistributions in binary form must reproduce the above copyright
29: * notice, this list of conditions and the following disclaimer in the
30: * documentation and/or other materials provided with the distribution.
31: * 3. All advertising materials mentioning features or use of this software
32: * must display the following acknowledgement:
33: * "This product includes cryptographic software written by
34: * Eric Young (eay@cryptsoft.com)"
35: * The word 'cryptographic' can be left out if the rouines from the library
36: * being used are not cryptographic related :-).
37: * 4. If you include any Windows specific code (or a derivative thereof) from
38: * the apps directory (application code) you must include an acknowledgement:
39: * "This product includes software written by Tim Hudson (tjh@cryptsoft.com)"
40: *
41: * THIS SOFTWARE IS PROVIDED BY ERIC YOUNG ``AS IS'' AND
42: * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
43: * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
44: * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
45: * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
46: * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
47: * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
48: * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
49: * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
50: * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
51: * SUCH DAMAGE.
52: *
53: * The licence and distribution terms for any publically available version or
54: * derivative of this code cannot be changed. i.e. this code cannot simply be
55: * copied and put under another distribution licence
56: * [including the GNU Public Licence.]
57: */
58: /* ====================================================================
59: * Copyright (c) 1998-2006 The OpenSSL Project. All rights reserved.
60: *
61: * Redistribution and use in source and binary forms, with or without
62: * modification, are permitted provided that the following conditions
63: * are met:
64: *
65: * 1. Redistributions of source code must retain the above copyright
66: * notice, this list of conditions and the following disclaimer.
67: *
68: * 2. Redistributions in binary form must reproduce the above copyright
69: * notice, this list of conditions and the following disclaimer in
70: * the documentation and/or other materials provided with the
71: * distribution.
72: *
73: * 3. All advertising materials mentioning features or use of this
74: * software must display the following acknowledgment:
75: * "This product includes software developed by the OpenSSL Project
76: * for use in the OpenSSL Toolkit. (http://www.openssl.org/)"
77: *
78: * 4. The names "OpenSSL Toolkit" and "OpenSSL Project" must not be used to
79: * endorse or promote products derived from this software without
80: * prior written permission. For written permission, please contact
81: * openssl-core@openssl.org.
82: *
83: * 5. Products derived from this software may not be called "OpenSSL"
84: * nor may "OpenSSL" appear in their names without prior written
85: * permission of the OpenSSL Project.
86: *
87: * 6. Redistributions of any form whatsoever must retain the following
88: * acknowledgment:
89: * "This product includes software developed by the OpenSSL Project
90: * for use in the OpenSSL Toolkit (http://www.openssl.org/)"
91: *
92: * THIS SOFTWARE IS PROVIDED BY THE OpenSSL PROJECT ``AS IS'' AND ANY
93: * EXPRESSED OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
94: * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
95: * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE OpenSSL PROJECT OR
96: * ITS CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
97: * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
98: * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
99: * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
100: * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
101: * STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
102: * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED
103: * OF THE POSSIBILITY OF SUCH DAMAGE.
104: * ====================================================================
105: *
106: * This product includes cryptographic software written by Eric Young
107: * (eay@cryptsoft.com). This product includes software written by Tim
108: * Hudson (tjh@cryptsoft.com).
109: *
110: */
111:
112: #include <sys/socket.h>
113:
114: #include <netinet/in.h>
115:
116: #include <netdb.h>
117: #include <stdio.h>
118: #include <stdlib.h>
119: #include <string.h>
120:
121: #include "apps.h"
122:
123: #include <openssl/err.h>
124: #include <openssl/ssl.h>
125: #include <openssl/x509.h>
126:
127: #include "s_apps.h"
128:
129: #define COOKIE_SECRET_LENGTH 16
130:
131: int verify_depth = 0;
132: int verify_return_error = 0;
133: unsigned char cookie_secret[COOKIE_SECRET_LENGTH];
134: int cookie_initialized = 0;
135:
136: int
137: verify_callback(int ok, X509_STORE_CTX * ctx)
138: {
139: X509 *err_cert;
140: int err, depth;
141:
142: err_cert = X509_STORE_CTX_get_current_cert(ctx);
143: err = X509_STORE_CTX_get_error(ctx);
144: depth = X509_STORE_CTX_get_error_depth(ctx);
145:
146: BIO_printf(bio_err, "depth=%d ", depth);
147: if (err_cert) {
148: X509_NAME_print_ex(bio_err, X509_get_subject_name(err_cert),
149: 0, XN_FLAG_ONELINE);
150: BIO_puts(bio_err, "\n");
151: } else
152: BIO_puts(bio_err, "<no cert>\n");
153: if (!ok) {
154: BIO_printf(bio_err, "verify error:num=%d:%s\n", err,
155: X509_verify_cert_error_string(err));
156: if (verify_depth >= depth) {
157: if (!verify_return_error)
158: ok = 1;
159: } else {
160: ok = 0;
161: }
162: }
163: switch (err) {
164: case X509_V_ERR_UNABLE_TO_GET_ISSUER_CERT:
165: BIO_puts(bio_err, "issuer= ");
1.4 doug 166: if (err_cert == NULL)
167: BIO_puts(bio_err, "<error getting cert>");
168: else
169: X509_NAME_print_ex(bio_err,
170: X509_get_issuer_name(err_cert), 0, XN_FLAG_ONELINE);
1.1 jsing 171: BIO_puts(bio_err, "\n");
172: break;
173: case X509_V_ERR_CERT_NOT_YET_VALID:
174: case X509_V_ERR_ERROR_IN_CERT_NOT_BEFORE_FIELD:
175: BIO_printf(bio_err, "notBefore=");
1.4 doug 176: if (err_cert == NULL)
177: BIO_printf(bio_err, " <error getting cert>");
178: else
179: ASN1_TIME_print(bio_err, X509_get_notBefore(err_cert));
1.1 jsing 180: BIO_printf(bio_err, "\n");
181: break;
182: case X509_V_ERR_CERT_HAS_EXPIRED:
183: case X509_V_ERR_ERROR_IN_CERT_NOT_AFTER_FIELD:
184: BIO_printf(bio_err, "notAfter=");
1.4 doug 185: if (err_cert == NULL)
186: BIO_printf(bio_err, " <error getting cert>");
187: else
188: ASN1_TIME_print(bio_err, X509_get_notAfter(err_cert));
1.1 jsing 189: BIO_printf(bio_err, "\n");
190: break;
191: case X509_V_ERR_NO_EXPLICIT_POLICY:
192: policies_print(bio_err, ctx);
193: break;
194: }
195: if (err == X509_V_OK && ok == 2)
196: policies_print(bio_err, ctx);
197:
198: BIO_printf(bio_err, "verify return:%d\n", ok);
199: return (ok);
200: }
201:
202: int
203: set_cert_stuff(SSL_CTX * ctx, char *cert_file, char *key_file)
204: {
205: if (cert_file != NULL) {
206: /*
207: SSL *ssl;
208: X509 *x509;
209: */
210:
211: if (SSL_CTX_use_certificate_file(ctx, cert_file,
212: SSL_FILETYPE_PEM) <= 0) {
213: BIO_printf(bio_err,
214: "unable to get certificate from '%s'\n", cert_file);
215: ERR_print_errors(bio_err);
216: return (0);
217: }
218: if (key_file == NULL)
219: key_file = cert_file;
220: if (SSL_CTX_use_PrivateKey_file(ctx, key_file,
221: SSL_FILETYPE_PEM) <= 0) {
222: BIO_printf(bio_err,
223: "unable to get private key from '%s'\n", key_file);
224: ERR_print_errors(bio_err);
225: return (0);
226: }
227: /*
228: In theory this is no longer needed
229: ssl=SSL_new(ctx);
230: x509=SSL_get_certificate(ssl);
231:
232: if (x509 != NULL) {
233: EVP_PKEY *pktmp;
234: pktmp = X509_get_pubkey(x509);
235: EVP_PKEY_copy_parameters(pktmp,
236: SSL_get_privatekey(ssl));
237: EVP_PKEY_free(pktmp);
238: }
239: SSL_free(ssl);
240: */
241:
242: /*
243: * If we are using DSA, we can copy the parameters from the
244: * private key
245: */
246:
247:
248: /*
249: * Now we know that a key and cert have been set against the
250: * SSL context
251: */
252: if (!SSL_CTX_check_private_key(ctx)) {
253: BIO_printf(bio_err,
254: "Private key does not match the certificate public key\n");
255: return (0);
256: }
257: }
258: return (1);
259: }
260:
261: int
262: set_cert_key_stuff(SSL_CTX * ctx, X509 * cert, EVP_PKEY * key)
263: {
264: if (cert == NULL)
265: return 1;
266: if (SSL_CTX_use_certificate(ctx, cert) <= 0) {
267: BIO_printf(bio_err, "error setting certificate\n");
268: ERR_print_errors(bio_err);
269: return 0;
270: }
271: if (SSL_CTX_use_PrivateKey(ctx, key) <= 0) {
272: BIO_printf(bio_err, "error setting private key\n");
273: ERR_print_errors(bio_err);
274: return 0;
275: }
276: /*
277: * Now we know that a key and cert have been set against the SSL
278: * context
279: */
280: if (!SSL_CTX_check_private_key(ctx)) {
281: BIO_printf(bio_err,
282: "Private key does not match the certificate public key\n");
283: return 0;
284: }
1.7 jsing 285: return 1;
286: }
287:
288: int
289: ssl_print_tmp_key(BIO *out, SSL *s)
290: {
291: const char *cname;
292: EVP_PKEY *pkey;
293: EC_KEY *ec;
294: int nid;
295:
296: if (!SSL_get_server_tmp_key(s, &pkey))
297: return 0;
298:
299: BIO_puts(out, "Server Temp Key: ");
300: switch (EVP_PKEY_id(pkey)) {
301: case EVP_PKEY_DH:
302: BIO_printf(out, "DH, %d bits\n", EVP_PKEY_bits(pkey));
303: break;
304:
305: case EVP_PKEY_EC:
306: ec = EVP_PKEY_get1_EC_KEY(pkey);
307: nid = EC_GROUP_get_curve_name(EC_KEY_get0_group(ec));
308: EC_KEY_free(ec);
309:
310: if ((cname = EC_curve_nid2nist(nid)) == NULL)
311: cname = OBJ_nid2sn(nid);
312:
313: BIO_printf(out, "ECDH, %s, %d bits\n", cname, EVP_PKEY_bits(pkey));
314: break;
315:
316: default:
317: BIO_printf(out, "%s, %d bits\n", OBJ_nid2sn(EVP_PKEY_id(pkey)),
318: EVP_PKEY_bits(pkey));
319: }
320:
321: EVP_PKEY_free(pkey);
1.1 jsing 322: return 1;
323: }
324:
325: long
326: bio_dump_callback(BIO * bio, int cmd, const char *argp,
327: int argi, long argl, long ret)
328: {
329: BIO *out;
330:
331: out = (BIO *) BIO_get_callback_arg(bio);
332: if (out == NULL)
333: return (ret);
334:
335: if (cmd == (BIO_CB_READ | BIO_CB_RETURN)) {
336: BIO_printf(out,
337: "read from %p [%p] (%lu bytes => %ld (0x%lX))\n",
338: (void *) bio, argp, (unsigned long) argi, ret, ret);
339: BIO_dump(out, argp, (int) ret);
340: return (ret);
341: } else if (cmd == (BIO_CB_WRITE | BIO_CB_RETURN)) {
342: BIO_printf(out,
343: "write to %p [%p] (%lu bytes => %ld (0x%lX))\n",
344: (void *) bio, argp, (unsigned long) argi, ret, ret);
345: BIO_dump(out, argp, (int) ret);
346: }
347: return (ret);
348: }
349:
350: void
351: apps_ssl_info_callback(const SSL * s, int where, int ret)
352: {
353: const char *str;
354: int w;
355:
356: w = where & ~SSL_ST_MASK;
357:
358: if (w & SSL_ST_CONNECT)
359: str = "SSL_connect";
360: else if (w & SSL_ST_ACCEPT)
361: str = "SSL_accept";
362: else
363: str = "undefined";
364:
365: if (where & SSL_CB_LOOP) {
366: BIO_printf(bio_err, "%s:%s\n", str, SSL_state_string_long(s));
367: } else if (where & SSL_CB_ALERT) {
368: str = (where & SSL_CB_READ) ? "read" : "write";
369: BIO_printf(bio_err, "SSL3 alert %s:%s:%s\n", str,
370: SSL_alert_type_string_long(ret),
371: SSL_alert_desc_string_long(ret));
372: } else if (where & SSL_CB_EXIT) {
373: if (ret == 0)
374: BIO_printf(bio_err, "%s:failed in %s\n",
375: str, SSL_state_string_long(s));
376: else if (ret < 0) {
377: BIO_printf(bio_err, "%s:error in %s\n",
378: str, SSL_state_string_long(s));
379: }
380: }
381: }
382:
383:
384: void
385: msg_cb(int write_p, int version, int content_type, const void *buf, size_t len, SSL * ssl, void *arg)
386: {
387: BIO *bio = arg;
388: const char *str_write_p, *str_version, *str_content_type = "",
389: *str_details1 = "", *str_details2 = "";
390:
391: str_write_p = write_p ? ">>>" : "<<<";
392:
393: switch (version) {
394: case SSL2_VERSION:
395: str_version = "SSL 2.0";
396: break;
397: case SSL3_VERSION:
398: str_version = "SSL 3.0 ";
399: break;
400: case TLS1_VERSION:
401: str_version = "TLS 1.0 ";
402: break;
403: case TLS1_1_VERSION:
404: str_version = "TLS 1.1 ";
405: break;
406: case TLS1_2_VERSION:
407: str_version = "TLS 1.2 ";
408: break;
409: case DTLS1_VERSION:
410: str_version = "DTLS 1.0 ";
411: break;
412: default:
413: str_version = "???";
414: }
415:
416: if (version == SSL2_VERSION) {
417: str_details1 = "???";
418:
419: if (len > 0) {
420: switch (((const unsigned char *) buf)[0]) {
421: case 0:
422: str_details1 = ", ERROR:";
423: str_details2 = " ???";
424: if (len >= 3) {
425: unsigned err = (((const unsigned char *) buf)[1] << 8) + ((const unsigned char *) buf)[2];
426:
427: switch (err) {
428: case 0x0001:
429: str_details2 = " NO-CIPHER-ERROR";
430: break;
431: case 0x0002:
432: str_details2 = " NO-CERTIFICATE-ERROR";
433: break;
434: case 0x0004:
435: str_details2 = " BAD-CERTIFICATE-ERROR";
436: break;
437: case 0x0006:
438: str_details2 = " UNSUPPORTED-CERTIFICATE-TYPE-ERROR";
439: break;
440: }
441: }
442: break;
443: case 1:
444: str_details1 = ", CLIENT-HELLO";
445: break;
446: case 2:
447: str_details1 = ", CLIENT-MASTER-KEY";
448: break;
449: case 3:
450: str_details1 = ", CLIENT-FINISHED";
451: break;
452: case 4:
453: str_details1 = ", SERVER-HELLO";
454: break;
455: case 5:
456: str_details1 = ", SERVER-VERIFY";
457: break;
458: case 6:
459: str_details1 = ", SERVER-FINISHED";
460: break;
461: case 7:
462: str_details1 = ", REQUEST-CERTIFICATE";
463: break;
464: case 8:
465: str_details1 = ", CLIENT-CERTIFICATE";
466: break;
467: }
468: }
469: }
470: if (version == SSL3_VERSION || version == TLS1_VERSION ||
471: version == TLS1_1_VERSION || version == TLS1_2_VERSION ||
1.6 jsing 472: version == DTLS1_VERSION) {
1.1 jsing 473: switch (content_type) {
474: case 20:
475: str_content_type = "ChangeCipherSpec";
476: break;
477: case 21:
478: str_content_type = "Alert";
479: break;
480: case 22:
481: str_content_type = "Handshake";
482: break;
483: }
484:
485: if (content_type == 21) { /* Alert */
486: str_details1 = ", ???";
487:
488: if (len == 2) {
489: switch (((const unsigned char *) buf)[0]) {
490: case 1:
491: str_details1 = ", warning";
492: break;
493: case 2:
494: str_details1 = ", fatal";
495: break;
496: }
497:
498: str_details2 = " ???";
499: switch (((const unsigned char *) buf)[1]) {
500: case 0:
501: str_details2 = " close_notify";
502: break;
503: case 10:
504: str_details2 = " unexpected_message";
505: break;
506: case 20:
507: str_details2 = " bad_record_mac";
508: break;
509: case 21:
510: str_details2 = " decryption_failed";
511: break;
512: case 22:
513: str_details2 = " record_overflow";
514: break;
515: case 30:
516: str_details2 = " decompression_failure";
517: break;
518: case 40:
519: str_details2 = " handshake_failure";
520: break;
521: case 42:
522: str_details2 = " bad_certificate";
523: break;
524: case 43:
525: str_details2 = " unsupported_certificate";
526: break;
527: case 44:
528: str_details2 = " certificate_revoked";
529: break;
530: case 45:
531: str_details2 = " certificate_expired";
532: break;
533: case 46:
534: str_details2 = " certificate_unknown";
535: break;
536: case 47:
537: str_details2 = " illegal_parameter";
538: break;
539: case 48:
540: str_details2 = " unknown_ca";
541: break;
542: case 49:
543: str_details2 = " access_denied";
544: break;
545: case 50:
546: str_details2 = " decode_error";
547: break;
548: case 51:
549: str_details2 = " decrypt_error";
550: break;
551: case 60:
552: str_details2 = " export_restriction";
553: break;
554: case 70:
555: str_details2 = " protocol_version";
556: break;
557: case 71:
558: str_details2 = " insufficient_security";
559: break;
560: case 80:
561: str_details2 = " internal_error";
562: break;
563: case 90:
564: str_details2 = " user_canceled";
565: break;
566: case 100:
567: str_details2 = " no_renegotiation";
568: break;
569: case 110:
570: str_details2 = " unsupported_extension";
571: break;
572: case 111:
573: str_details2 = " certificate_unobtainable";
574: break;
575: case 112:
576: str_details2 = " unrecognized_name";
577: break;
578: case 113:
579: str_details2 = " bad_certificate_status_response";
580: break;
581: case 114:
582: str_details2 = " bad_certificate_hash_value";
583: break;
584: case 115:
585: str_details2 = " unknown_psk_identity";
586: break;
587: }
588: }
589: }
590: if (content_type == 22) { /* Handshake */
591: str_details1 = "???";
592:
593: if (len > 0) {
594: switch (((const unsigned char *) buf)[0]) {
595: case 0:
596: str_details1 = ", HelloRequest";
597: break;
598: case 1:
599: str_details1 = ", ClientHello";
600: break;
601: case 2:
602: str_details1 = ", ServerHello";
603: break;
604: case 3:
605: str_details1 = ", HelloVerifyRequest";
606: break;
607: case 11:
608: str_details1 = ", Certificate";
609: break;
610: case 12:
611: str_details1 = ", ServerKeyExchange";
612: break;
613: case 13:
614: str_details1 = ", CertificateRequest";
615: break;
616: case 14:
617: str_details1 = ", ServerHelloDone";
618: break;
619: case 15:
620: str_details1 = ", CertificateVerify";
621: break;
622: case 16:
623: str_details1 = ", ClientKeyExchange";
624: break;
625: case 20:
626: str_details1 = ", Finished";
627: break;
628: }
629: }
630: }
631: }
632: BIO_printf(bio, "%s %s%s [length %04lx]%s%s\n", str_write_p,
633: str_version, str_content_type, (unsigned long) len,
634: str_details1, str_details2);
635:
636: if (len > 0) {
637: size_t num, i;
638:
639: BIO_printf(bio, " ");
640: num = len;
1.3 doug 641:
1.1 jsing 642: for (i = 0; i < num; i++) {
643: if (i % 16 == 0 && i > 0)
644: BIO_printf(bio, "\n ");
645: BIO_printf(bio, " %02x",
646: ((const unsigned char *) buf)[i]);
647: }
648: if (i < len)
649: BIO_printf(bio, " ...");
650: BIO_printf(bio, "\n");
651: }
652: (void) BIO_flush(bio);
653: }
654:
655: void
656: tlsext_cb(SSL * s, int client_server, int type, unsigned char *data, int len,
657: void *arg)
658: {
659: BIO *bio = arg;
660: char *extname;
661:
662: switch (type) {
663: case TLSEXT_TYPE_server_name:
664: extname = "server name";
665: break;
666:
667: case TLSEXT_TYPE_max_fragment_length:
668: extname = "max fragment length";
669: break;
670:
671: case TLSEXT_TYPE_client_certificate_url:
672: extname = "client certificate URL";
673: break;
674:
675: case TLSEXT_TYPE_trusted_ca_keys:
676: extname = "trusted CA keys";
677: break;
678:
679: case TLSEXT_TYPE_truncated_hmac:
680: extname = "truncated HMAC";
681: break;
682:
683: case TLSEXT_TYPE_status_request:
684: extname = "status request";
685: break;
686:
687: case TLSEXT_TYPE_user_mapping:
688: extname = "user mapping";
689: break;
690:
691: case TLSEXT_TYPE_client_authz:
692: extname = "client authz";
693: break;
694:
695: case TLSEXT_TYPE_server_authz:
696: extname = "server authz";
697: break;
698:
699: case TLSEXT_TYPE_cert_type:
700: extname = "cert type";
701: break;
702:
703: case TLSEXT_TYPE_elliptic_curves:
704: extname = "elliptic curves";
705: break;
706:
707: case TLSEXT_TYPE_ec_point_formats:
708: extname = "EC point formats";
709: break;
710:
711: case TLSEXT_TYPE_srp:
712: extname = "SRP";
713: break;
714:
715: case TLSEXT_TYPE_signature_algorithms:
716: extname = "signature algorithms";
717: break;
718:
719: case TLSEXT_TYPE_use_srtp:
720: extname = "use SRTP";
721: break;
722:
723: case TLSEXT_TYPE_heartbeat:
724: extname = "heartbeat";
725: break;
726:
727: case TLSEXT_TYPE_session_ticket:
728: extname = "session ticket";
729: break;
730:
731: case TLSEXT_TYPE_renegotiate:
732: extname = "renegotiation info";
733: break;
734:
735: default:
736: extname = "unknown";
737: break;
738:
739: }
740:
741: BIO_printf(bio, "TLS %s extension \"%s\" (id=%d), len=%d\n",
742: client_server ? "server" : "client", extname, type, len);
743: BIO_dump(bio, (char *) data, len);
744: (void) BIO_flush(bio);
745: }
746:
747: int
748: generate_cookie_callback(SSL * ssl, unsigned char *cookie,
749: unsigned int *cookie_len)
750: {
751: unsigned char *buffer, result[EVP_MAX_MD_SIZE];
752: unsigned int length, resultlength;
753: union {
754: struct sockaddr sa;
755: struct sockaddr_in s4;
756: struct sockaddr_in6 s6;
757: } peer;
758:
759: /* Initialize a random secret */
760: if (!cookie_initialized) {
1.2 jsing 761: arc4random_buf(cookie_secret, COOKIE_SECRET_LENGTH);
1.1 jsing 762: cookie_initialized = 1;
763: }
764: /* Read peer information */
765: (void) BIO_dgram_get_peer(SSL_get_rbio(ssl), &peer);
766:
767: /* Create buffer with peer's address and port */
768: length = 0;
769: switch (peer.sa.sa_family) {
770: case AF_INET:
771: length += sizeof(struct in_addr);
772: length += sizeof(peer.s4.sin_port);
773: break;
774: case AF_INET6:
775: length += sizeof(struct in6_addr);
776: length += sizeof(peer.s6.sin6_port);
777: break;
778: default:
779: OPENSSL_assert(0);
780: break;
781: }
782: buffer = malloc(length);
783:
784: if (buffer == NULL) {
785: BIO_printf(bio_err, "out of memory\n");
786: return 0;
787: }
788: switch (peer.sa.sa_family) {
789: case AF_INET:
790: memcpy(buffer, &peer.s4.sin_port, sizeof(peer.s4.sin_port));
791: memcpy(buffer + sizeof(peer.s4.sin_port),
792: &peer.s4.sin_addr, sizeof(struct in_addr));
793: break;
794: case AF_INET6:
795: memcpy(buffer, &peer.s6.sin6_port, sizeof(peer.s6.sin6_port));
796: memcpy(buffer + sizeof(peer.s6.sin6_port),
797: &peer.s6.sin6_addr, sizeof(struct in6_addr));
798: break;
799: default:
800: OPENSSL_assert(0);
801: break;
802: }
803:
804: /* Calculate HMAC of buffer using the secret */
805: HMAC(EVP_sha1(), cookie_secret, COOKIE_SECRET_LENGTH,
806: buffer, length, result, &resultlength);
807: free(buffer);
808:
809: memcpy(cookie, result, resultlength);
810: *cookie_len = resultlength;
811:
812: return 1;
813: }
814:
815: int
816: verify_cookie_callback(SSL * ssl, unsigned char *cookie, unsigned int cookie_len)
817: {
818: unsigned char *buffer, result[EVP_MAX_MD_SIZE];
819: unsigned int length, resultlength;
820: union {
821: struct sockaddr sa;
822: struct sockaddr_in s4;
823: struct sockaddr_in6 s6;
824: } peer;
825:
826: /* If secret isn't initialized yet, the cookie can't be valid */
827: if (!cookie_initialized)
828: return 0;
829:
830: /* Read peer information */
831: (void) BIO_dgram_get_peer(SSL_get_rbio(ssl), &peer);
832:
833: /* Create buffer with peer's address and port */
834: length = 0;
835: switch (peer.sa.sa_family) {
836: case AF_INET:
837: length += sizeof(struct in_addr);
838: length += sizeof(peer.s4.sin_port);
839: break;
840: case AF_INET6:
841: length += sizeof(struct in6_addr);
842: length += sizeof(peer.s6.sin6_port);
843: break;
844: default:
845: OPENSSL_assert(0);
846: break;
847: }
848: buffer = malloc(length);
849:
850: if (buffer == NULL) {
851: BIO_printf(bio_err, "out of memory\n");
852: return 0;
853: }
854: switch (peer.sa.sa_family) {
855: case AF_INET:
856: memcpy(buffer, &peer.s4.sin_port, sizeof(peer.s4.sin_port));
857: memcpy(buffer + sizeof(peer.s4.sin_port),
858: &peer.s4.sin_addr, sizeof(struct in_addr));
859: break;
860: case AF_INET6:
861: memcpy(buffer, &peer.s6.sin6_port, sizeof(peer.s6.sin6_port));
862: memcpy(buffer + sizeof(peer.s6.sin6_port),
863: &peer.s6.sin6_addr, sizeof(struct in6_addr));
864: break;
865: default:
866: OPENSSL_assert(0);
867: break;
868: }
869:
870: /* Calculate HMAC of buffer using the secret */
871: HMAC(EVP_sha1(), cookie_secret, COOKIE_SECRET_LENGTH,
872: buffer, length, result, &resultlength);
873: free(buffer);
874:
875: if (cookie_len == resultlength &&
876: memcmp(result, cookie, resultlength) == 0)
877: return 1;
878:
879: return 0;
880: }