Annotation of src/usr.bin/openssl/s_cb.c, Revision 1.4
1.4 ! doug 1: /* $OpenBSD: s_cb.c,v 1.3 2015/02/08 10:22:45 doug 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_error = X509_V_OK;
133: int verify_return_error = 0;
134: unsigned char cookie_secret[COOKIE_SECRET_LENGTH];
135: int cookie_initialized = 0;
136:
137: int
138: verify_callback(int ok, X509_STORE_CTX * ctx)
139: {
140: X509 *err_cert;
141: int err, depth;
142:
143: err_cert = X509_STORE_CTX_get_current_cert(ctx);
144: err = X509_STORE_CTX_get_error(ctx);
145: depth = X509_STORE_CTX_get_error_depth(ctx);
146:
147: BIO_printf(bio_err, "depth=%d ", depth);
148: if (err_cert) {
149: X509_NAME_print_ex(bio_err, X509_get_subject_name(err_cert),
150: 0, XN_FLAG_ONELINE);
151: BIO_puts(bio_err, "\n");
152: } else
153: BIO_puts(bio_err, "<no cert>\n");
154: if (!ok) {
155: BIO_printf(bio_err, "verify error:num=%d:%s\n", err,
156: X509_verify_cert_error_string(err));
157: if (verify_depth >= depth) {
158: if (!verify_return_error)
159: ok = 1;
160: verify_error = X509_V_OK;
161: } else {
162: ok = 0;
163: verify_error = X509_V_ERR_CERT_CHAIN_TOO_LONG;
164: }
165: }
166: switch (err) {
167: case X509_V_ERR_UNABLE_TO_GET_ISSUER_CERT:
168: BIO_puts(bio_err, "issuer= ");
1.4 ! doug 169: if (err_cert == NULL)
! 170: BIO_puts(bio_err, "<error getting cert>");
! 171: else
! 172: X509_NAME_print_ex(bio_err,
! 173: X509_get_issuer_name(err_cert), 0, XN_FLAG_ONELINE);
1.1 jsing 174: BIO_puts(bio_err, "\n");
175: break;
176: case X509_V_ERR_CERT_NOT_YET_VALID:
177: case X509_V_ERR_ERROR_IN_CERT_NOT_BEFORE_FIELD:
178: BIO_printf(bio_err, "notBefore=");
1.4 ! doug 179: if (err_cert == NULL)
! 180: BIO_printf(bio_err, " <error getting cert>");
! 181: else
! 182: ASN1_TIME_print(bio_err, X509_get_notBefore(err_cert));
1.1 jsing 183: BIO_printf(bio_err, "\n");
184: break;
185: case X509_V_ERR_CERT_HAS_EXPIRED:
186: case X509_V_ERR_ERROR_IN_CERT_NOT_AFTER_FIELD:
187: BIO_printf(bio_err, "notAfter=");
1.4 ! doug 188: if (err_cert == NULL)
! 189: BIO_printf(bio_err, " <error getting cert>");
! 190: else
! 191: ASN1_TIME_print(bio_err, X509_get_notAfter(err_cert));
1.1 jsing 192: BIO_printf(bio_err, "\n");
193: break;
194: case X509_V_ERR_NO_EXPLICIT_POLICY:
195: policies_print(bio_err, ctx);
196: break;
197: }
198: if (err == X509_V_OK && ok == 2)
199: policies_print(bio_err, ctx);
200:
201: BIO_printf(bio_err, "verify return:%d\n", ok);
202: return (ok);
203: }
204:
205: int
206: set_cert_stuff(SSL_CTX * ctx, char *cert_file, char *key_file)
207: {
208: if (cert_file != NULL) {
209: /*
210: SSL *ssl;
211: X509 *x509;
212: */
213:
214: if (SSL_CTX_use_certificate_file(ctx, cert_file,
215: SSL_FILETYPE_PEM) <= 0) {
216: BIO_printf(bio_err,
217: "unable to get certificate from '%s'\n", cert_file);
218: ERR_print_errors(bio_err);
219: return (0);
220: }
221: if (key_file == NULL)
222: key_file = cert_file;
223: if (SSL_CTX_use_PrivateKey_file(ctx, key_file,
224: SSL_FILETYPE_PEM) <= 0) {
225: BIO_printf(bio_err,
226: "unable to get private key from '%s'\n", key_file);
227: ERR_print_errors(bio_err);
228: return (0);
229: }
230: /*
231: In theory this is no longer needed
232: ssl=SSL_new(ctx);
233: x509=SSL_get_certificate(ssl);
234:
235: if (x509 != NULL) {
236: EVP_PKEY *pktmp;
237: pktmp = X509_get_pubkey(x509);
238: EVP_PKEY_copy_parameters(pktmp,
239: SSL_get_privatekey(ssl));
240: EVP_PKEY_free(pktmp);
241: }
242: SSL_free(ssl);
243: */
244:
245: /*
246: * If we are using DSA, we can copy the parameters from the
247: * private key
248: */
249:
250:
251: /*
252: * Now we know that a key and cert have been set against the
253: * SSL context
254: */
255: if (!SSL_CTX_check_private_key(ctx)) {
256: BIO_printf(bio_err,
257: "Private key does not match the certificate public key\n");
258: return (0);
259: }
260: }
261: return (1);
262: }
263:
264: int
265: set_cert_key_stuff(SSL_CTX * ctx, X509 * cert, EVP_PKEY * key)
266: {
267: if (cert == NULL)
268: return 1;
269: if (SSL_CTX_use_certificate(ctx, cert) <= 0) {
270: BIO_printf(bio_err, "error setting certificate\n");
271: ERR_print_errors(bio_err);
272: return 0;
273: }
274: if (SSL_CTX_use_PrivateKey(ctx, key) <= 0) {
275: BIO_printf(bio_err, "error setting private key\n");
276: ERR_print_errors(bio_err);
277: return 0;
278: }
279: /*
280: * Now we know that a key and cert have been set against the SSL
281: * context
282: */
283: if (!SSL_CTX_check_private_key(ctx)) {
284: BIO_printf(bio_err,
285: "Private key does not match the certificate public key\n");
286: return 0;
287: }
288: return 1;
289: }
290:
291: long
292: bio_dump_callback(BIO * bio, int cmd, const char *argp,
293: int argi, long argl, long ret)
294: {
295: BIO *out;
296:
297: out = (BIO *) BIO_get_callback_arg(bio);
298: if (out == NULL)
299: return (ret);
300:
301: if (cmd == (BIO_CB_READ | BIO_CB_RETURN)) {
302: BIO_printf(out,
303: "read from %p [%p] (%lu bytes => %ld (0x%lX))\n",
304: (void *) bio, argp, (unsigned long) argi, ret, ret);
305: BIO_dump(out, argp, (int) ret);
306: return (ret);
307: } else if (cmd == (BIO_CB_WRITE | BIO_CB_RETURN)) {
308: BIO_printf(out,
309: "write to %p [%p] (%lu bytes => %ld (0x%lX))\n",
310: (void *) bio, argp, (unsigned long) argi, ret, ret);
311: BIO_dump(out, argp, (int) ret);
312: }
313: return (ret);
314: }
315:
316: void
317: apps_ssl_info_callback(const SSL * s, int where, int ret)
318: {
319: const char *str;
320: int w;
321:
322: w = where & ~SSL_ST_MASK;
323:
324: if (w & SSL_ST_CONNECT)
325: str = "SSL_connect";
326: else if (w & SSL_ST_ACCEPT)
327: str = "SSL_accept";
328: else
329: str = "undefined";
330:
331: if (where & SSL_CB_LOOP) {
332: BIO_printf(bio_err, "%s:%s\n", str, SSL_state_string_long(s));
333: } else if (where & SSL_CB_ALERT) {
334: str = (where & SSL_CB_READ) ? "read" : "write";
335: BIO_printf(bio_err, "SSL3 alert %s:%s:%s\n", str,
336: SSL_alert_type_string_long(ret),
337: SSL_alert_desc_string_long(ret));
338: } else if (where & SSL_CB_EXIT) {
339: if (ret == 0)
340: BIO_printf(bio_err, "%s:failed in %s\n",
341: str, SSL_state_string_long(s));
342: else if (ret < 0) {
343: BIO_printf(bio_err, "%s:error in %s\n",
344: str, SSL_state_string_long(s));
345: }
346: }
347: }
348:
349:
350: void
351: msg_cb(int write_p, int version, int content_type, const void *buf, size_t len, SSL * ssl, void *arg)
352: {
353: BIO *bio = arg;
354: const char *str_write_p, *str_version, *str_content_type = "",
355: *str_details1 = "", *str_details2 = "";
356:
357: str_write_p = write_p ? ">>>" : "<<<";
358:
359: switch (version) {
360: case SSL2_VERSION:
361: str_version = "SSL 2.0";
362: break;
363: case SSL3_VERSION:
364: str_version = "SSL 3.0 ";
365: break;
366: case TLS1_VERSION:
367: str_version = "TLS 1.0 ";
368: break;
369: case TLS1_1_VERSION:
370: str_version = "TLS 1.1 ";
371: break;
372: case TLS1_2_VERSION:
373: str_version = "TLS 1.2 ";
374: break;
375: case DTLS1_VERSION:
376: str_version = "DTLS 1.0 ";
377: break;
378: case DTLS1_BAD_VER:
379: str_version = "DTLS 1.0 (bad) ";
380: break;
381: default:
382: str_version = "???";
383: }
384:
385: if (version == SSL2_VERSION) {
386: str_details1 = "???";
387:
388: if (len > 0) {
389: switch (((const unsigned char *) buf)[0]) {
390: case 0:
391: str_details1 = ", ERROR:";
392: str_details2 = " ???";
393: if (len >= 3) {
394: unsigned err = (((const unsigned char *) buf)[1] << 8) + ((const unsigned char *) buf)[2];
395:
396: switch (err) {
397: case 0x0001:
398: str_details2 = " NO-CIPHER-ERROR";
399: break;
400: case 0x0002:
401: str_details2 = " NO-CERTIFICATE-ERROR";
402: break;
403: case 0x0004:
404: str_details2 = " BAD-CERTIFICATE-ERROR";
405: break;
406: case 0x0006:
407: str_details2 = " UNSUPPORTED-CERTIFICATE-TYPE-ERROR";
408: break;
409: }
410: }
411: break;
412: case 1:
413: str_details1 = ", CLIENT-HELLO";
414: break;
415: case 2:
416: str_details1 = ", CLIENT-MASTER-KEY";
417: break;
418: case 3:
419: str_details1 = ", CLIENT-FINISHED";
420: break;
421: case 4:
422: str_details1 = ", SERVER-HELLO";
423: break;
424: case 5:
425: str_details1 = ", SERVER-VERIFY";
426: break;
427: case 6:
428: str_details1 = ", SERVER-FINISHED";
429: break;
430: case 7:
431: str_details1 = ", REQUEST-CERTIFICATE";
432: break;
433: case 8:
434: str_details1 = ", CLIENT-CERTIFICATE";
435: break;
436: }
437: }
438: }
439: if (version == SSL3_VERSION || version == TLS1_VERSION ||
440: version == TLS1_1_VERSION || version == TLS1_2_VERSION ||
441: version == DTLS1_VERSION || version == DTLS1_BAD_VER) {
442: switch (content_type) {
443: case 20:
444: str_content_type = "ChangeCipherSpec";
445: break;
446: case 21:
447: str_content_type = "Alert";
448: break;
449: case 22:
450: str_content_type = "Handshake";
451: break;
452: }
453:
454: if (content_type == 21) { /* Alert */
455: str_details1 = ", ???";
456:
457: if (len == 2) {
458: switch (((const unsigned char *) buf)[0]) {
459: case 1:
460: str_details1 = ", warning";
461: break;
462: case 2:
463: str_details1 = ", fatal";
464: break;
465: }
466:
467: str_details2 = " ???";
468: switch (((const unsigned char *) buf)[1]) {
469: case 0:
470: str_details2 = " close_notify";
471: break;
472: case 10:
473: str_details2 = " unexpected_message";
474: break;
475: case 20:
476: str_details2 = " bad_record_mac";
477: break;
478: case 21:
479: str_details2 = " decryption_failed";
480: break;
481: case 22:
482: str_details2 = " record_overflow";
483: break;
484: case 30:
485: str_details2 = " decompression_failure";
486: break;
487: case 40:
488: str_details2 = " handshake_failure";
489: break;
490: case 42:
491: str_details2 = " bad_certificate";
492: break;
493: case 43:
494: str_details2 = " unsupported_certificate";
495: break;
496: case 44:
497: str_details2 = " certificate_revoked";
498: break;
499: case 45:
500: str_details2 = " certificate_expired";
501: break;
502: case 46:
503: str_details2 = " certificate_unknown";
504: break;
505: case 47:
506: str_details2 = " illegal_parameter";
507: break;
508: case 48:
509: str_details2 = " unknown_ca";
510: break;
511: case 49:
512: str_details2 = " access_denied";
513: break;
514: case 50:
515: str_details2 = " decode_error";
516: break;
517: case 51:
518: str_details2 = " decrypt_error";
519: break;
520: case 60:
521: str_details2 = " export_restriction";
522: break;
523: case 70:
524: str_details2 = " protocol_version";
525: break;
526: case 71:
527: str_details2 = " insufficient_security";
528: break;
529: case 80:
530: str_details2 = " internal_error";
531: break;
532: case 90:
533: str_details2 = " user_canceled";
534: break;
535: case 100:
536: str_details2 = " no_renegotiation";
537: break;
538: case 110:
539: str_details2 = " unsupported_extension";
540: break;
541: case 111:
542: str_details2 = " certificate_unobtainable";
543: break;
544: case 112:
545: str_details2 = " unrecognized_name";
546: break;
547: case 113:
548: str_details2 = " bad_certificate_status_response";
549: break;
550: case 114:
551: str_details2 = " bad_certificate_hash_value";
552: break;
553: case 115:
554: str_details2 = " unknown_psk_identity";
555: break;
556: }
557: }
558: }
559: if (content_type == 22) { /* Handshake */
560: str_details1 = "???";
561:
562: if (len > 0) {
563: switch (((const unsigned char *) buf)[0]) {
564: case 0:
565: str_details1 = ", HelloRequest";
566: break;
567: case 1:
568: str_details1 = ", ClientHello";
569: break;
570: case 2:
571: str_details1 = ", ServerHello";
572: break;
573: case 3:
574: str_details1 = ", HelloVerifyRequest";
575: break;
576: case 11:
577: str_details1 = ", Certificate";
578: break;
579: case 12:
580: str_details1 = ", ServerKeyExchange";
581: break;
582: case 13:
583: str_details1 = ", CertificateRequest";
584: break;
585: case 14:
586: str_details1 = ", ServerHelloDone";
587: break;
588: case 15:
589: str_details1 = ", CertificateVerify";
590: break;
591: case 16:
592: str_details1 = ", ClientKeyExchange";
593: break;
594: case 20:
595: str_details1 = ", Finished";
596: break;
597: }
598: }
599: }
600: }
601: BIO_printf(bio, "%s %s%s [length %04lx]%s%s\n", str_write_p,
602: str_version, str_content_type, (unsigned long) len,
603: str_details1, str_details2);
604:
605: if (len > 0) {
606: size_t num, i;
607:
608: BIO_printf(bio, " ");
609: num = len;
1.3 doug 610:
1.1 jsing 611: for (i = 0; i < num; i++) {
612: if (i % 16 == 0 && i > 0)
613: BIO_printf(bio, "\n ");
614: BIO_printf(bio, " %02x",
615: ((const unsigned char *) buf)[i]);
616: }
617: if (i < len)
618: BIO_printf(bio, " ...");
619: BIO_printf(bio, "\n");
620: }
621: (void) BIO_flush(bio);
622: }
623:
624: void
625: tlsext_cb(SSL * s, int client_server, int type, unsigned char *data, int len,
626: void *arg)
627: {
628: BIO *bio = arg;
629: char *extname;
630:
631: switch (type) {
632: case TLSEXT_TYPE_server_name:
633: extname = "server name";
634: break;
635:
636: case TLSEXT_TYPE_max_fragment_length:
637: extname = "max fragment length";
638: break;
639:
640: case TLSEXT_TYPE_client_certificate_url:
641: extname = "client certificate URL";
642: break;
643:
644: case TLSEXT_TYPE_trusted_ca_keys:
645: extname = "trusted CA keys";
646: break;
647:
648: case TLSEXT_TYPE_truncated_hmac:
649: extname = "truncated HMAC";
650: break;
651:
652: case TLSEXT_TYPE_status_request:
653: extname = "status request";
654: break;
655:
656: case TLSEXT_TYPE_user_mapping:
657: extname = "user mapping";
658: break;
659:
660: case TLSEXT_TYPE_client_authz:
661: extname = "client authz";
662: break;
663:
664: case TLSEXT_TYPE_server_authz:
665: extname = "server authz";
666: break;
667:
668: case TLSEXT_TYPE_cert_type:
669: extname = "cert type";
670: break;
671:
672: case TLSEXT_TYPE_elliptic_curves:
673: extname = "elliptic curves";
674: break;
675:
676: case TLSEXT_TYPE_ec_point_formats:
677: extname = "EC point formats";
678: break;
679:
680: case TLSEXT_TYPE_srp:
681: extname = "SRP";
682: break;
683:
684: case TLSEXT_TYPE_signature_algorithms:
685: extname = "signature algorithms";
686: break;
687:
688: case TLSEXT_TYPE_use_srtp:
689: extname = "use SRTP";
690: break;
691:
692: case TLSEXT_TYPE_heartbeat:
693: extname = "heartbeat";
694: break;
695:
696: case TLSEXT_TYPE_session_ticket:
697: extname = "session ticket";
698: break;
699:
700: case TLSEXT_TYPE_renegotiate:
701: extname = "renegotiation info";
702: break;
703:
704: #ifdef TLSEXT_TYPE_next_proto_neg
705: case TLSEXT_TYPE_next_proto_neg:
706: extname = "next protocol";
707: break;
708: #endif
709:
710: default:
711: extname = "unknown";
712: break;
713:
714: }
715:
716: BIO_printf(bio, "TLS %s extension \"%s\" (id=%d), len=%d\n",
717: client_server ? "server" : "client", extname, type, len);
718: BIO_dump(bio, (char *) data, len);
719: (void) BIO_flush(bio);
720: }
721:
722: int
723: generate_cookie_callback(SSL * ssl, unsigned char *cookie,
724: unsigned int *cookie_len)
725: {
726: unsigned char *buffer, result[EVP_MAX_MD_SIZE];
727: unsigned int length, resultlength;
728: union {
729: struct sockaddr sa;
730: struct sockaddr_in s4;
731: struct sockaddr_in6 s6;
732: } peer;
733:
734: /* Initialize a random secret */
735: if (!cookie_initialized) {
1.2 jsing 736: arc4random_buf(cookie_secret, COOKIE_SECRET_LENGTH);
1.1 jsing 737: cookie_initialized = 1;
738: }
739: /* Read peer information */
740: (void) BIO_dgram_get_peer(SSL_get_rbio(ssl), &peer);
741:
742: /* Create buffer with peer's address and port */
743: length = 0;
744: switch (peer.sa.sa_family) {
745: case AF_INET:
746: length += sizeof(struct in_addr);
747: length += sizeof(peer.s4.sin_port);
748: break;
749: case AF_INET6:
750: length += sizeof(struct in6_addr);
751: length += sizeof(peer.s6.sin6_port);
752: break;
753: default:
754: OPENSSL_assert(0);
755: break;
756: }
757: buffer = malloc(length);
758:
759: if (buffer == NULL) {
760: BIO_printf(bio_err, "out of memory\n");
761: return 0;
762: }
763: switch (peer.sa.sa_family) {
764: case AF_INET:
765: memcpy(buffer, &peer.s4.sin_port, sizeof(peer.s4.sin_port));
766: memcpy(buffer + sizeof(peer.s4.sin_port),
767: &peer.s4.sin_addr, sizeof(struct in_addr));
768: break;
769: case AF_INET6:
770: memcpy(buffer, &peer.s6.sin6_port, sizeof(peer.s6.sin6_port));
771: memcpy(buffer + sizeof(peer.s6.sin6_port),
772: &peer.s6.sin6_addr, sizeof(struct in6_addr));
773: break;
774: default:
775: OPENSSL_assert(0);
776: break;
777: }
778:
779: /* Calculate HMAC of buffer using the secret */
780: HMAC(EVP_sha1(), cookie_secret, COOKIE_SECRET_LENGTH,
781: buffer, length, result, &resultlength);
782: free(buffer);
783:
784: memcpy(cookie, result, resultlength);
785: *cookie_len = resultlength;
786:
787: return 1;
788: }
789:
790: int
791: verify_cookie_callback(SSL * ssl, unsigned char *cookie, unsigned int cookie_len)
792: {
793: unsigned char *buffer, result[EVP_MAX_MD_SIZE];
794: unsigned int length, resultlength;
795: union {
796: struct sockaddr sa;
797: struct sockaddr_in s4;
798: struct sockaddr_in6 s6;
799: } peer;
800:
801: /* If secret isn't initialized yet, the cookie can't be valid */
802: if (!cookie_initialized)
803: return 0;
804:
805: /* Read peer information */
806: (void) BIO_dgram_get_peer(SSL_get_rbio(ssl), &peer);
807:
808: /* Create buffer with peer's address and port */
809: length = 0;
810: switch (peer.sa.sa_family) {
811: case AF_INET:
812: length += sizeof(struct in_addr);
813: length += sizeof(peer.s4.sin_port);
814: break;
815: case AF_INET6:
816: length += sizeof(struct in6_addr);
817: length += sizeof(peer.s6.sin6_port);
818: break;
819: default:
820: OPENSSL_assert(0);
821: break;
822: }
823: buffer = malloc(length);
824:
825: if (buffer == NULL) {
826: BIO_printf(bio_err, "out of memory\n");
827: return 0;
828: }
829: switch (peer.sa.sa_family) {
830: case AF_INET:
831: memcpy(buffer, &peer.s4.sin_port, sizeof(peer.s4.sin_port));
832: memcpy(buffer + sizeof(peer.s4.sin_port),
833: &peer.s4.sin_addr, sizeof(struct in_addr));
834: break;
835: case AF_INET6:
836: memcpy(buffer, &peer.s6.sin6_port, sizeof(peer.s6.sin6_port));
837: memcpy(buffer + sizeof(peer.s6.sin6_port),
838: &peer.s6.sin6_addr, sizeof(struct in6_addr));
839: break;
840: default:
841: OPENSSL_assert(0);
842: break;
843: }
844:
845: /* Calculate HMAC of buffer using the secret */
846: HMAC(EVP_sha1(), cookie_secret, COOKIE_SECRET_LENGTH,
847: buffer, length, result, &resultlength);
848: free(buffer);
849:
850: if (cookie_len == resultlength &&
851: memcmp(result, cookie, resultlength) == 0)
852: return 1;
853:
854: return 0;
855: }