1 /* apps/s_cb.c - callback functions used by s_client, s_server, and s_time */
2 /* Copyright (C) 1995-1998 Eric Young (eay@cryptsoft.com)
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.
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).
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.
23 * Redistribution and use in source and binary forms, with or without
24 * modification, are permitted provided that the following conditions
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)"
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
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.]
58 /* ====================================================================
59 * Copyright (c) 1998-2006 The OpenSSL Project. All rights reserved.
61 * Redistribution and use in source and binary forms, with or without
62 * modification, are permitted provided that the following conditions
65 * 1. Redistributions of source code must retain the above copyright
66 * notice, this list of conditions and the following disclaimer.
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
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/)"
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.
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.
87 * 6. Redistributions of any form whatsoever must retain the following
89 * "This product includes software developed by the OpenSSL Project
90 * for use in the OpenSSL Toolkit (http://www.openssl.org/)"
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 * ====================================================================
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).
119 #include <openssl/err.h>
120 #include <openssl/rand.h>
121 #include <openssl/x509.h>
122 #include <openssl/ssl.h>
125 #define COOKIE_SECRET_LENGTH 16
128 int verify_error=X509_V_OK;
129 int verify_return_error=0;
130 unsigned char cookie_secret[COOKIE_SECRET_LENGTH];
131 int cookie_initialized=0;
133 int MS_CALLBACK verify_callback(int ok, X509_STORE_CTX *ctx)
138 err_cert=X509_STORE_CTX_get_current_cert(ctx);
139 err= X509_STORE_CTX_get_error(ctx);
140 depth= X509_STORE_CTX_get_error_depth(ctx);
142 BIO_printf(bio_err,"depth=%d ",depth);
145 X509_NAME_print_ex(bio_err, X509_get_subject_name(err_cert),
147 BIO_puts(bio_err, "\n");
150 BIO_puts(bio_err, "<no cert>\n");
153 BIO_printf(bio_err,"verify error:num=%d:%s\n",err,
154 X509_verify_cert_error_string(err));
155 if (verify_depth >= depth)
157 if (!verify_return_error)
159 verify_error=X509_V_OK;
164 verify_error=X509_V_ERR_CERT_CHAIN_TOO_LONG;
169 case X509_V_ERR_UNABLE_TO_GET_ISSUER_CERT:
170 BIO_puts(bio_err,"issuer= ");
171 X509_NAME_print_ex(bio_err, X509_get_issuer_name(err_cert),
173 BIO_puts(bio_err, "\n");
175 case X509_V_ERR_CERT_NOT_YET_VALID:
176 case X509_V_ERR_ERROR_IN_CERT_NOT_BEFORE_FIELD:
177 BIO_printf(bio_err,"notBefore=");
178 ASN1_TIME_print(bio_err,X509_get_notBefore(err_cert));
179 BIO_printf(bio_err,"\n");
181 case X509_V_ERR_CERT_HAS_EXPIRED:
182 case X509_V_ERR_ERROR_IN_CERT_NOT_AFTER_FIELD:
183 BIO_printf(bio_err,"notAfter=");
184 ASN1_TIME_print(bio_err,X509_get_notAfter(err_cert));
185 BIO_printf(bio_err,"\n");
187 case X509_V_ERR_NO_EXPLICIT_POLICY:
188 policies_print(bio_err, ctx);
191 if (err == X509_V_OK && ok == 2)
192 policies_print(bio_err, ctx);
194 BIO_printf(bio_err,"verify return:%d\n",ok);
198 int set_cert_stuff(SSL_CTX *ctx, char *cert_file, char *key_file)
200 if (cert_file != NULL)
207 if (SSL_CTX_use_certificate_file(ctx,cert_file,
208 SSL_FILETYPE_PEM) <= 0)
210 BIO_printf(bio_err,"unable to get certificate from '%s'\n",cert_file);
211 ERR_print_errors(bio_err);
214 if (key_file == NULL) key_file=cert_file;
215 if (SSL_CTX_use_PrivateKey_file(ctx,key_file,
216 SSL_FILETYPE_PEM) <= 0)
218 BIO_printf(bio_err,"unable to get private key from '%s'\n",key_file);
219 ERR_print_errors(bio_err);
224 In theory this is no longer needed
226 x509=SSL_get_certificate(ssl);
230 pktmp = X509_get_pubkey(x509);
231 EVP_PKEY_copy_parameters(pktmp,
232 SSL_get_privatekey(ssl));
233 EVP_PKEY_free(pktmp);
238 /* If we are using DSA, we can copy the parameters from
242 /* Now we know that a key and cert have been set against
244 if (!SSL_CTX_check_private_key(ctx))
246 BIO_printf(bio_err,"Private key does not match the certificate public key\n");
253 int set_cert_key_stuff(SSL_CTX *ctx, X509 *cert, EVP_PKEY *key,
254 STACK_OF(X509) *chain)
258 if (SSL_CTX_use_certificate(ctx,cert) <= 0)
260 BIO_printf(bio_err,"error setting certificate\n");
261 ERR_print_errors(bio_err);
264 if (SSL_CTX_use_PrivateKey(ctx,key) <= 0)
266 BIO_printf(bio_err,"error setting private key\n");
267 ERR_print_errors(bio_err);
272 /* Now we know that a key and cert have been set against
274 if (!SSL_CTX_check_private_key(ctx))
276 BIO_printf(bio_err,"Private key does not match the certificate public key\n");
279 if (chain && !SSL_CTX_set1_chain(ctx, chain))
281 BIO_printf(bio_err,"error setting certificate chain\n");
282 ERR_print_errors(bio_err);
288 int ssl_print_sigalgs(BIO *out, SSL *s)
291 nsig = SSL_get_sigalgs(s, -1, NULL, NULL, NULL, NULL, NULL);
295 BIO_puts(out, "Signature Algorithms: ");
296 for (i = 0; i < nsig; i++)
298 int hash_nid, sign_nid;
299 unsigned char rhash, rsign;
300 const char *sstr = NULL;
301 SSL_get_sigalgs(s, i, &sign_nid, &hash_nid, NULL,
305 if (sign_nid == EVP_PKEY_RSA)
307 else if(sign_nid == EVP_PKEY_DSA)
309 else if(sign_nid == EVP_PKEY_EC)
312 BIO_printf(out,"%s+", sstr);
314 BIO_printf(out,"0x%02X+", (int)rsign);
315 if (hash_nid != NID_undef)
316 BIO_printf(out, "%s", OBJ_nid2sn(hash_nid));
318 BIO_printf(out,"0x%02X", (int)rhash);
324 int ssl_print_curves(BIO *out, SSL *s)
326 int i, ncurves, *curves, nid;
328 ncurves = SSL_get1_curves(s, NULL);
331 curves = OPENSSL_malloc(ncurves * sizeof(int));
332 SSL_get1_curves(s, curves);
334 BIO_puts(out, "Supported Elliptic Curves: ");
335 for (i = 0; i < ncurves; i++)
340 /* If unrecognised print out hex version */
341 if (nid & TLSEXT_nid_unknown)
342 BIO_printf(out, "0x%04X", nid & 0xFFFF);
345 /* Use NIST name for curve if it exists */
346 cname = EC_curve_nid2nist(nid);
348 cname = OBJ_nid2sn(nid);
349 BIO_printf(out, "%s", cname);
352 BIO_puts(out, "\nShared Elliptic curves: ");
353 OPENSSL_free(curves);
354 ncurves = SSL_get_shared_curve(s, -1);
355 for (i = 0; i < ncurves; i++)
359 nid = SSL_get_shared_curve(s, i);
360 cname = EC_curve_nid2nist(nid);
362 cname = OBJ_nid2sn(nid);
363 BIO_printf(out, "%s", cname);
366 BIO_puts(out, "NONE");
372 long MS_CALLBACK bio_dump_callback(BIO *bio, int cmd, const char *argp,
373 int argi, long argl, long ret)
377 out=(BIO *)BIO_get_callback_arg(bio);
378 if (out == NULL) return(ret);
380 if (cmd == (BIO_CB_READ|BIO_CB_RETURN))
382 BIO_printf(out,"read from %p [%p] (%lu bytes => %ld (0x%lX))\n",
383 (void *)bio,argp,(unsigned long)argi,ret,ret);
384 BIO_dump(out,argp,(int)ret);
387 else if (cmd == (BIO_CB_WRITE|BIO_CB_RETURN))
389 BIO_printf(out,"write to %p [%p] (%lu bytes => %ld (0x%lX))\n",
390 (void *)bio,argp,(unsigned long)argi,ret,ret);
391 BIO_dump(out,argp,(int)ret);
396 void MS_CALLBACK apps_ssl_info_callback(const SSL *s, int where, int ret)
401 w=where& ~SSL_ST_MASK;
403 if (w & SSL_ST_CONNECT) str="SSL_connect";
404 else if (w & SSL_ST_ACCEPT) str="SSL_accept";
405 else str="undefined";
407 if (where & SSL_CB_LOOP)
409 BIO_printf(bio_err,"%s:%s\n",str,SSL_state_string_long(s));
411 else if (where & SSL_CB_ALERT)
413 str=(where & SSL_CB_READ)?"read":"write";
414 BIO_printf(bio_err,"SSL3 alert %s:%s:%s\n",
416 SSL_alert_type_string_long(ret),
417 SSL_alert_desc_string_long(ret));
419 else if (where & SSL_CB_EXIT)
422 BIO_printf(bio_err,"%s:failed in %s\n",
423 str,SSL_state_string_long(s));
426 BIO_printf(bio_err,"%s:error in %s\n",
427 str,SSL_state_string_long(s));
433 void MS_CALLBACK msg_cb(int write_p, int version, int content_type, const void *buf, size_t len, SSL *ssl, void *arg)
436 const char *str_write_p, *str_version, *str_content_type = "", *str_details1 = "", *str_details2= "";
438 str_write_p = write_p ? ">>>" : "<<<";
443 str_version = "SSL 2.0";
446 str_version = "SSL 3.0 ";
449 str_version = "TLS 1.0 ";
452 str_version = "TLS 1.1 ";
455 str_version = "TLS 1.2 ";
458 str_version = "DTLS 1.0 ";
461 str_version = "DTLS 1.0 (bad) ";
467 if (version == SSL2_VERSION)
469 str_details1 = "???";
473 switch (((const unsigned char*)buf)[0])
476 str_details1 = ", ERROR:";
477 str_details2 = " ???";
480 unsigned err = (((const unsigned char*)buf)[1]<<8) + ((const unsigned char*)buf)[2];
485 str_details2 = " NO-CIPHER-ERROR";
488 str_details2 = " NO-CERTIFICATE-ERROR";
491 str_details2 = " BAD-CERTIFICATE-ERROR";
494 str_details2 = " UNSUPPORTED-CERTIFICATE-TYPE-ERROR";
501 str_details1 = ", CLIENT-HELLO";
504 str_details1 = ", CLIENT-MASTER-KEY";
507 str_details1 = ", CLIENT-FINISHED";
510 str_details1 = ", SERVER-HELLO";
513 str_details1 = ", SERVER-VERIFY";
516 str_details1 = ", SERVER-FINISHED";
519 str_details1 = ", REQUEST-CERTIFICATE";
522 str_details1 = ", CLIENT-CERTIFICATE";
528 if (version == SSL3_VERSION ||
529 version == TLS1_VERSION ||
530 version == DTLS1_VERSION ||
531 version == DTLS1_BAD_VER)
533 switch (content_type)
536 str_content_type = "ChangeCipherSpec";
539 str_content_type = "Alert";
542 str_content_type = "Handshake";
546 if (content_type == 21) /* Alert */
548 str_details1 = ", ???";
552 switch (((const unsigned char*)buf)[0])
555 str_details1 = ", warning";
558 str_details1 = ", fatal";
562 str_details2 = " ???";
563 switch (((const unsigned char*)buf)[1])
566 str_details2 = " close_notify";
569 str_details2 = " unexpected_message";
572 str_details2 = " bad_record_mac";
575 str_details2 = " decryption_failed";
578 str_details2 = " record_overflow";
581 str_details2 = " decompression_failure";
584 str_details2 = " handshake_failure";
587 str_details2 = " bad_certificate";
590 str_details2 = " unsupported_certificate";
593 str_details2 = " certificate_revoked";
596 str_details2 = " certificate_expired";
599 str_details2 = " certificate_unknown";
602 str_details2 = " illegal_parameter";
605 str_details2 = " unknown_ca";
608 str_details2 = " access_denied";
611 str_details2 = " decode_error";
614 str_details2 = " decrypt_error";
617 str_details2 = " export_restriction";
620 str_details2 = " protocol_version";
623 str_details2 = " insufficient_security";
626 str_details2 = " internal_error";
629 str_details2 = " user_canceled";
632 str_details2 = " no_renegotiation";
635 str_details2 = " unsupported_extension";
638 str_details2 = " certificate_unobtainable";
641 str_details2 = " unrecognized_name";
644 str_details2 = " bad_certificate_status_response";
647 str_details2 = " bad_certificate_hash_value";
650 str_details2 = " unknown_psk_identity";
656 if (content_type == 22) /* Handshake */
658 str_details1 = "???";
662 switch (((const unsigned char*)buf)[0])
665 str_details1 = ", HelloRequest";
668 str_details1 = ", ClientHello";
671 str_details1 = ", ServerHello";
674 str_details1 = ", HelloVerifyRequest";
677 str_details1 = ", Certificate";
680 str_details1 = ", ServerKeyExchange";
683 str_details1 = ", CertificateRequest";
686 str_details1 = ", ServerHelloDone";
689 str_details1 = ", CertificateVerify";
692 str_details1 = ", ClientKeyExchange";
695 str_details1 = ", Finished";
701 #ifndef OPENSSL_NO_HEARTBEATS
702 if (content_type == 24) /* Heartbeat */
704 str_details1 = ", Heartbeat";
708 switch (((const unsigned char*)buf)[0])
711 str_details1 = ", HeartbeatRequest";
714 str_details1 = ", HeartbeatResponse";
722 BIO_printf(bio, "%s %s%s [length %04lx]%s%s\n", str_write_p, str_version, str_content_type, (unsigned long)len, str_details1, str_details2);
728 BIO_printf(bio, " ");
734 for (i = 0; i < num; i++)
736 if (i % 16 == 0 && i > 0)
737 BIO_printf(bio, "\n ");
738 BIO_printf(bio, " %02x", ((const unsigned char*)buf)[i]);
741 BIO_printf(bio, " ...");
742 BIO_printf(bio, "\n");
744 (void)BIO_flush(bio);
747 void MS_CALLBACK tlsext_cb(SSL *s, int client_server, int type,
748 unsigned char *data, int len,
756 case TLSEXT_TYPE_server_name:
757 extname = "server name";
760 case TLSEXT_TYPE_max_fragment_length:
761 extname = "max fragment length";
764 case TLSEXT_TYPE_client_certificate_url:
765 extname = "client certificate URL";
768 case TLSEXT_TYPE_trusted_ca_keys:
769 extname = "trusted CA keys";
772 case TLSEXT_TYPE_truncated_hmac:
773 extname = "truncated HMAC";
776 case TLSEXT_TYPE_status_request:
777 extname = "status request";
780 case TLSEXT_TYPE_user_mapping:
781 extname = "user mapping";
784 case TLSEXT_TYPE_client_authz:
785 extname = "client authz";
788 case TLSEXT_TYPE_server_authz:
789 extname = "server authz";
792 case TLSEXT_TYPE_cert_type:
793 extname = "cert type";
796 case TLSEXT_TYPE_elliptic_curves:
797 extname = "elliptic curves";
800 case TLSEXT_TYPE_ec_point_formats:
801 extname = "EC point formats";
804 case TLSEXT_TYPE_srp:
808 case TLSEXT_TYPE_signature_algorithms:
809 extname = "signature algorithms";
812 case TLSEXT_TYPE_use_srtp:
813 extname = "use SRTP";
816 case TLSEXT_TYPE_heartbeat:
817 extname = "heartbeat";
820 case TLSEXT_TYPE_session_ticket:
821 extname = "session ticket";
824 case TLSEXT_TYPE_renegotiate:
825 extname = "renegotiation info";
828 #ifdef TLSEXT_TYPE_opaque_prf_input
829 case TLSEXT_TYPE_opaque_prf_input:
830 extname = "opaque PRF input";
833 #ifdef TLSEXT_TYPE_next_proto_neg
834 case TLSEXT_TYPE_next_proto_neg:
835 extname = "next protocol";
845 BIO_printf(bio, "TLS %s extension \"%s\" (id=%d), len=%d\n",
846 client_server ? "server": "client",
848 BIO_dump(bio, (char *)data, len);
849 (void)BIO_flush(bio);
852 int MS_CALLBACK generate_cookie_callback(SSL *ssl, unsigned char *cookie, unsigned int *cookie_len)
854 unsigned char *buffer, result[EVP_MAX_MD_SIZE];
855 unsigned int length, resultlength;
858 struct sockaddr_in s4;
860 struct sockaddr_in6 s6;
864 /* Initialize a random secret */
865 if (!cookie_initialized)
867 if (!RAND_bytes(cookie_secret, COOKIE_SECRET_LENGTH))
869 BIO_printf(bio_err,"error setting random cookie secret\n");
872 cookie_initialized = 1;
875 /* Read peer information */
876 (void)BIO_dgram_get_peer(SSL_get_rbio(ssl), &peer);
878 /* Create buffer with peer's address and port */
880 switch (peer.sa.sa_family)
883 length += sizeof(struct in_addr);
884 length += sizeof(peer.s4.sin_port);
888 length += sizeof(struct in6_addr);
889 length += sizeof(peer.s6.sin6_port);
896 buffer = OPENSSL_malloc(length);
900 BIO_printf(bio_err,"out of memory\n");
904 switch (peer.sa.sa_family)
909 sizeof(peer.s4.sin_port));
910 memcpy(buffer + sizeof(peer.s4.sin_port),
912 sizeof(struct in_addr));
918 sizeof(peer.s6.sin6_port));
919 memcpy(buffer + sizeof(peer.s6.sin6_port),
921 sizeof(struct in6_addr));
929 /* Calculate HMAC of buffer using the secret */
930 HMAC(EVP_sha1(), cookie_secret, COOKIE_SECRET_LENGTH,
931 buffer, length, result, &resultlength);
932 OPENSSL_free(buffer);
934 memcpy(cookie, result, resultlength);
935 *cookie_len = resultlength;
940 int MS_CALLBACK verify_cookie_callback(SSL *ssl, unsigned char *cookie, unsigned int cookie_len)
942 unsigned char *buffer, result[EVP_MAX_MD_SIZE];
943 unsigned int length, resultlength;
946 struct sockaddr_in s4;
948 struct sockaddr_in6 s6;
952 /* If secret isn't initialized yet, the cookie can't be valid */
953 if (!cookie_initialized)
956 /* Read peer information */
957 (void)BIO_dgram_get_peer(SSL_get_rbio(ssl), &peer);
959 /* Create buffer with peer's address and port */
961 switch (peer.sa.sa_family)
964 length += sizeof(struct in_addr);
965 length += sizeof(peer.s4.sin_port);
969 length += sizeof(struct in6_addr);
970 length += sizeof(peer.s6.sin6_port);
977 buffer = OPENSSL_malloc(length);
981 BIO_printf(bio_err,"out of memory\n");
985 switch (peer.sa.sa_family)
990 sizeof(peer.s4.sin_port));
991 memcpy(buffer + sizeof(peer.s4.sin_port),
993 sizeof(struct in_addr));
999 sizeof(peer.s6.sin6_port));
1000 memcpy(buffer + sizeof(peer.s6.sin6_port),
1002 sizeof(struct in6_addr));
1010 /* Calculate HMAC of buffer using the secret */
1011 HMAC(EVP_sha1(), cookie_secret, COOKIE_SECRET_LENGTH,
1012 buffer, length, result, &resultlength);
1013 OPENSSL_free(buffer);
1015 if (cookie_len == resultlength && memcmp(result, cookie, resultlength) == 0)