Annotation of src/usr.bin/openssl/s_cb.c, Revision 1.5
1.5 ! bcook 1: /* $OpenBSD: s_cb.c,v 1.4 2015/07/20 21:52:07 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_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: }
285: return 1;
286: }
287:
288: long
289: bio_dump_callback(BIO * bio, int cmd, const char *argp,
290: int argi, long argl, long ret)
291: {
292: BIO *out;
293:
294: out = (BIO *) BIO_get_callback_arg(bio);
295: if (out == NULL)
296: return (ret);
297:
298: if (cmd == (BIO_CB_READ | BIO_CB_RETURN)) {
299: BIO_printf(out,
300: "read from %p [%p] (%lu bytes => %ld (0x%lX))\n",
301: (void *) bio, argp, (unsigned long) argi, ret, ret);
302: BIO_dump(out, argp, (int) ret);
303: return (ret);
304: } else if (cmd == (BIO_CB_WRITE | BIO_CB_RETURN)) {
305: BIO_printf(out,
306: "write to %p [%p] (%lu bytes => %ld (0x%lX))\n",
307: (void *) bio, argp, (unsigned long) argi, ret, ret);
308: BIO_dump(out, argp, (int) ret);
309: }
310: return (ret);
311: }
312:
313: void
314: apps_ssl_info_callback(const SSL * s, int where, int ret)
315: {
316: const char *str;
317: int w;
318:
319: w = where & ~SSL_ST_MASK;
320:
321: if (w & SSL_ST_CONNECT)
322: str = "SSL_connect";
323: else if (w & SSL_ST_ACCEPT)
324: str = "SSL_accept";
325: else
326: str = "undefined";
327:
328: if (where & SSL_CB_LOOP) {
329: BIO_printf(bio_err, "%s:%s\n", str, SSL_state_string_long(s));
330: } else if (where & SSL_CB_ALERT) {
331: str = (where & SSL_CB_READ) ? "read" : "write";
332: BIO_printf(bio_err, "SSL3 alert %s:%s:%s\n", str,
333: SSL_alert_type_string_long(ret),
334: SSL_alert_desc_string_long(ret));
335: } else if (where & SSL_CB_EXIT) {
336: if (ret == 0)
337: BIO_printf(bio_err, "%s:failed in %s\n",
338: str, SSL_state_string_long(s));
339: else if (ret < 0) {
340: BIO_printf(bio_err, "%s:error in %s\n",
341: str, SSL_state_string_long(s));
342: }
343: }
344: }
345:
346:
347: void
348: msg_cb(int write_p, int version, int content_type, const void *buf, size_t len, SSL * ssl, void *arg)
349: {
350: BIO *bio = arg;
351: const char *str_write_p, *str_version, *str_content_type = "",
352: *str_details1 = "", *str_details2 = "";
353:
354: str_write_p = write_p ? ">>>" : "<<<";
355:
356: switch (version) {
357: case SSL2_VERSION:
358: str_version = "SSL 2.0";
359: break;
360: case SSL3_VERSION:
361: str_version = "SSL 3.0 ";
362: break;
363: case TLS1_VERSION:
364: str_version = "TLS 1.0 ";
365: break;
366: case TLS1_1_VERSION:
367: str_version = "TLS 1.1 ";
368: break;
369: case TLS1_2_VERSION:
370: str_version = "TLS 1.2 ";
371: break;
372: case DTLS1_VERSION:
373: str_version = "DTLS 1.0 ";
374: break;
375: case DTLS1_BAD_VER:
376: str_version = "DTLS 1.0 (bad) ";
377: break;
378: default:
379: str_version = "???";
380: }
381:
382: if (version == SSL2_VERSION) {
383: str_details1 = "???";
384:
385: if (len > 0) {
386: switch (((const unsigned char *) buf)[0]) {
387: case 0:
388: str_details1 = ", ERROR:";
389: str_details2 = " ???";
390: if (len >= 3) {
391: unsigned err = (((const unsigned char *) buf)[1] << 8) + ((const unsigned char *) buf)[2];
392:
393: switch (err) {
394: case 0x0001:
395: str_details2 = " NO-CIPHER-ERROR";
396: break;
397: case 0x0002:
398: str_details2 = " NO-CERTIFICATE-ERROR";
399: break;
400: case 0x0004:
401: str_details2 = " BAD-CERTIFICATE-ERROR";
402: break;
403: case 0x0006:
404: str_details2 = " UNSUPPORTED-CERTIFICATE-TYPE-ERROR";
405: break;
406: }
407: }
408: break;
409: case 1:
410: str_details1 = ", CLIENT-HELLO";
411: break;
412: case 2:
413: str_details1 = ", CLIENT-MASTER-KEY";
414: break;
415: case 3:
416: str_details1 = ", CLIENT-FINISHED";
417: break;
418: case 4:
419: str_details1 = ", SERVER-HELLO";
420: break;
421: case 5:
422: str_details1 = ", SERVER-VERIFY";
423: break;
424: case 6:
425: str_details1 = ", SERVER-FINISHED";
426: break;
427: case 7:
428: str_details1 = ", REQUEST-CERTIFICATE";
429: break;
430: case 8:
431: str_details1 = ", CLIENT-CERTIFICATE";
432: break;
433: }
434: }
435: }
436: if (version == SSL3_VERSION || version == TLS1_VERSION ||
437: version == TLS1_1_VERSION || version == TLS1_2_VERSION ||
438: version == DTLS1_VERSION || version == DTLS1_BAD_VER) {
439: switch (content_type) {
440: case 20:
441: str_content_type = "ChangeCipherSpec";
442: break;
443: case 21:
444: str_content_type = "Alert";
445: break;
446: case 22:
447: str_content_type = "Handshake";
448: break;
449: }
450:
451: if (content_type == 21) { /* Alert */
452: str_details1 = ", ???";
453:
454: if (len == 2) {
455: switch (((const unsigned char *) buf)[0]) {
456: case 1:
457: str_details1 = ", warning";
458: break;
459: case 2:
460: str_details1 = ", fatal";
461: break;
462: }
463:
464: str_details2 = " ???";
465: switch (((const unsigned char *) buf)[1]) {
466: case 0:
467: str_details2 = " close_notify";
468: break;
469: case 10:
470: str_details2 = " unexpected_message";
471: break;
472: case 20:
473: str_details2 = " bad_record_mac";
474: break;
475: case 21:
476: str_details2 = " decryption_failed";
477: break;
478: case 22:
479: str_details2 = " record_overflow";
480: break;
481: case 30:
482: str_details2 = " decompression_failure";
483: break;
484: case 40:
485: str_details2 = " handshake_failure";
486: break;
487: case 42:
488: str_details2 = " bad_certificate";
489: break;
490: case 43:
491: str_details2 = " unsupported_certificate";
492: break;
493: case 44:
494: str_details2 = " certificate_revoked";
495: break;
496: case 45:
497: str_details2 = " certificate_expired";
498: break;
499: case 46:
500: str_details2 = " certificate_unknown";
501: break;
502: case 47:
503: str_details2 = " illegal_parameter";
504: break;
505: case 48:
506: str_details2 = " unknown_ca";
507: break;
508: case 49:
509: str_details2 = " access_denied";
510: break;
511: case 50:
512: str_details2 = " decode_error";
513: break;
514: case 51:
515: str_details2 = " decrypt_error";
516: break;
517: case 60:
518: str_details2 = " export_restriction";
519: break;
520: case 70:
521: str_details2 = " protocol_version";
522: break;
523: case 71:
524: str_details2 = " insufficient_security";
525: break;
526: case 80:
527: str_details2 = " internal_error";
528: break;
529: case 90:
530: str_details2 = " user_canceled";
531: break;
532: case 100:
533: str_details2 = " no_renegotiation";
534: break;
535: case 110:
536: str_details2 = " unsupported_extension";
537: break;
538: case 111:
539: str_details2 = " certificate_unobtainable";
540: break;
541: case 112:
542: str_details2 = " unrecognized_name";
543: break;
544: case 113:
545: str_details2 = " bad_certificate_status_response";
546: break;
547: case 114:
548: str_details2 = " bad_certificate_hash_value";
549: break;
550: case 115:
551: str_details2 = " unknown_psk_identity";
552: break;
553: }
554: }
555: }
556: if (content_type == 22) { /* Handshake */
557: str_details1 = "???";
558:
559: if (len > 0) {
560: switch (((const unsigned char *) buf)[0]) {
561: case 0:
562: str_details1 = ", HelloRequest";
563: break;
564: case 1:
565: str_details1 = ", ClientHello";
566: break;
567: case 2:
568: str_details1 = ", ServerHello";
569: break;
570: case 3:
571: str_details1 = ", HelloVerifyRequest";
572: break;
573: case 11:
574: str_details1 = ", Certificate";
575: break;
576: case 12:
577: str_details1 = ", ServerKeyExchange";
578: break;
579: case 13:
580: str_details1 = ", CertificateRequest";
581: break;
582: case 14:
583: str_details1 = ", ServerHelloDone";
584: break;
585: case 15:
586: str_details1 = ", CertificateVerify";
587: break;
588: case 16:
589: str_details1 = ", ClientKeyExchange";
590: break;
591: case 20:
592: str_details1 = ", Finished";
593: break;
594: }
595: }
596: }
597: }
598: BIO_printf(bio, "%s %s%s [length %04lx]%s%s\n", str_write_p,
599: str_version, str_content_type, (unsigned long) len,
600: str_details1, str_details2);
601:
602: if (len > 0) {
603: size_t num, i;
604:
605: BIO_printf(bio, " ");
606: num = len;
1.3 doug 607:
1.1 jsing 608: for (i = 0; i < num; i++) {
609: if (i % 16 == 0 && i > 0)
610: BIO_printf(bio, "\n ");
611: BIO_printf(bio, " %02x",
612: ((const unsigned char *) buf)[i]);
613: }
614: if (i < len)
615: BIO_printf(bio, " ...");
616: BIO_printf(bio, "\n");
617: }
618: (void) BIO_flush(bio);
619: }
620:
621: void
622: tlsext_cb(SSL * s, int client_server, int type, unsigned char *data, int len,
623: void *arg)
624: {
625: BIO *bio = arg;
626: char *extname;
627:
628: switch (type) {
629: case TLSEXT_TYPE_server_name:
630: extname = "server name";
631: break;
632:
633: case TLSEXT_TYPE_max_fragment_length:
634: extname = "max fragment length";
635: break;
636:
637: case TLSEXT_TYPE_client_certificate_url:
638: extname = "client certificate URL";
639: break;
640:
641: case TLSEXT_TYPE_trusted_ca_keys:
642: extname = "trusted CA keys";
643: break;
644:
645: case TLSEXT_TYPE_truncated_hmac:
646: extname = "truncated HMAC";
647: break;
648:
649: case TLSEXT_TYPE_status_request:
650: extname = "status request";
651: break;
652:
653: case TLSEXT_TYPE_user_mapping:
654: extname = "user mapping";
655: break;
656:
657: case TLSEXT_TYPE_client_authz:
658: extname = "client authz";
659: break;
660:
661: case TLSEXT_TYPE_server_authz:
662: extname = "server authz";
663: break;
664:
665: case TLSEXT_TYPE_cert_type:
666: extname = "cert type";
667: break;
668:
669: case TLSEXT_TYPE_elliptic_curves:
670: extname = "elliptic curves";
671: break;
672:
673: case TLSEXT_TYPE_ec_point_formats:
674: extname = "EC point formats";
675: break;
676:
677: case TLSEXT_TYPE_srp:
678: extname = "SRP";
679: break;
680:
681: case TLSEXT_TYPE_signature_algorithms:
682: extname = "signature algorithms";
683: break;
684:
685: case TLSEXT_TYPE_use_srtp:
686: extname = "use SRTP";
687: break;
688:
689: case TLSEXT_TYPE_heartbeat:
690: extname = "heartbeat";
691: break;
692:
693: case TLSEXT_TYPE_session_ticket:
694: extname = "session ticket";
695: break;
696:
697: case TLSEXT_TYPE_renegotiate:
698: extname = "renegotiation info";
699: break;
700:
701: #ifdef TLSEXT_TYPE_next_proto_neg
702: case TLSEXT_TYPE_next_proto_neg:
703: extname = "next protocol";
704: break;
705: #endif
706:
707: default:
708: extname = "unknown";
709: break;
710:
711: }
712:
713: BIO_printf(bio, "TLS %s extension \"%s\" (id=%d), len=%d\n",
714: client_server ? "server" : "client", extname, type, len);
715: BIO_dump(bio, (char *) data, len);
716: (void) BIO_flush(bio);
717: }
718:
719: int
720: generate_cookie_callback(SSL * ssl, unsigned char *cookie,
721: unsigned int *cookie_len)
722: {
723: unsigned char *buffer, result[EVP_MAX_MD_SIZE];
724: unsigned int length, resultlength;
725: union {
726: struct sockaddr sa;
727: struct sockaddr_in s4;
728: struct sockaddr_in6 s6;
729: } peer;
730:
731: /* Initialize a random secret */
732: if (!cookie_initialized) {
1.2 jsing 733: arc4random_buf(cookie_secret, COOKIE_SECRET_LENGTH);
1.1 jsing 734: cookie_initialized = 1;
735: }
736: /* Read peer information */
737: (void) BIO_dgram_get_peer(SSL_get_rbio(ssl), &peer);
738:
739: /* Create buffer with peer's address and port */
740: length = 0;
741: switch (peer.sa.sa_family) {
742: case AF_INET:
743: length += sizeof(struct in_addr);
744: length += sizeof(peer.s4.sin_port);
745: break;
746: case AF_INET6:
747: length += sizeof(struct in6_addr);
748: length += sizeof(peer.s6.sin6_port);
749: break;
750: default:
751: OPENSSL_assert(0);
752: break;
753: }
754: buffer = malloc(length);
755:
756: if (buffer == NULL) {
757: BIO_printf(bio_err, "out of memory\n");
758: return 0;
759: }
760: switch (peer.sa.sa_family) {
761: case AF_INET:
762: memcpy(buffer, &peer.s4.sin_port, sizeof(peer.s4.sin_port));
763: memcpy(buffer + sizeof(peer.s4.sin_port),
764: &peer.s4.sin_addr, sizeof(struct in_addr));
765: break;
766: case AF_INET6:
767: memcpy(buffer, &peer.s6.sin6_port, sizeof(peer.s6.sin6_port));
768: memcpy(buffer + sizeof(peer.s6.sin6_port),
769: &peer.s6.sin6_addr, sizeof(struct in6_addr));
770: break;
771: default:
772: OPENSSL_assert(0);
773: break;
774: }
775:
776: /* Calculate HMAC of buffer using the secret */
777: HMAC(EVP_sha1(), cookie_secret, COOKIE_SECRET_LENGTH,
778: buffer, length, result, &resultlength);
779: free(buffer);
780:
781: memcpy(cookie, result, resultlength);
782: *cookie_len = resultlength;
783:
784: return 1;
785: }
786:
787: int
788: verify_cookie_callback(SSL * ssl, unsigned char *cookie, unsigned int cookie_len)
789: {
790: unsigned char *buffer, result[EVP_MAX_MD_SIZE];
791: unsigned int length, resultlength;
792: union {
793: struct sockaddr sa;
794: struct sockaddr_in s4;
795: struct sockaddr_in6 s6;
796: } peer;
797:
798: /* If secret isn't initialized yet, the cookie can't be valid */
799: if (!cookie_initialized)
800: return 0;
801:
802: /* Read peer information */
803: (void) BIO_dgram_get_peer(SSL_get_rbio(ssl), &peer);
804:
805: /* Create buffer with peer's address and port */
806: length = 0;
807: switch (peer.sa.sa_family) {
808: case AF_INET:
809: length += sizeof(struct in_addr);
810: length += sizeof(peer.s4.sin_port);
811: break;
812: case AF_INET6:
813: length += sizeof(struct in6_addr);
814: length += sizeof(peer.s6.sin6_port);
815: break;
816: default:
817: OPENSSL_assert(0);
818: break;
819: }
820: buffer = malloc(length);
821:
822: if (buffer == NULL) {
823: BIO_printf(bio_err, "out of memory\n");
824: return 0;
825: }
826: switch (peer.sa.sa_family) {
827: case AF_INET:
828: memcpy(buffer, &peer.s4.sin_port, sizeof(peer.s4.sin_port));
829: memcpy(buffer + sizeof(peer.s4.sin_port),
830: &peer.s4.sin_addr, sizeof(struct in_addr));
831: break;
832: case AF_INET6:
833: memcpy(buffer, &peer.s6.sin6_port, sizeof(peer.s6.sin6_port));
834: memcpy(buffer + sizeof(peer.s6.sin6_port),
835: &peer.s6.sin6_addr, sizeof(struct in6_addr));
836: break;
837: default:
838: OPENSSL_assert(0);
839: break;
840: }
841:
842: /* Calculate HMAC of buffer using the secret */
843: HMAC(EVP_sha1(), cookie_secret, COOKIE_SECRET_LENGTH,
844: buffer, length, result, &resultlength);
845: free(buffer);
846:
847: if (cookie_len == resultlength &&
848: memcmp(result, cookie, resultlength) == 0)
849: return 1;
850:
851: return 0;
852: }