3 * DTLS implementation written by Nagendra Modadugu
4 * (nagendra@cs.stanford.edu) for the OpenSSL project 2005.
6 /* ====================================================================
7 * Copyright (c) 1999-2007 The OpenSSL Project. All rights reserved.
9 * Redistribution and use in source and binary forms, with or without
10 * modification, are permitted provided that the following conditions
13 * 1. Redistributions of source code must retain the above copyright
14 * notice, this list of conditions and the following disclaimer.
16 * 2. Redistributions in binary form must reproduce the above copyright
17 * notice, this list of conditions and the following disclaimer in
18 * the documentation and/or other materials provided with the
21 * 3. All advertising materials mentioning features or use of this
22 * software must display the following acknowledgment:
23 * "This product includes software developed by the OpenSSL Project
24 * for use in the OpenSSL Toolkit. (http://www.OpenSSL.org/)"
26 * 4. The names "OpenSSL Toolkit" and "OpenSSL Project" must not be used to
27 * endorse or promote products derived from this software without
28 * prior written permission. For written permission, please contact
29 * openssl-core@OpenSSL.org.
31 * 5. Products derived from this software may not be called "OpenSSL"
32 * nor may "OpenSSL" appear in their names without prior written
33 * permission of the OpenSSL Project.
35 * 6. Redistributions of any form whatsoever must retain the following
37 * "This product includes software developed by the OpenSSL Project
38 * for use in the OpenSSL Toolkit (http://www.OpenSSL.org/)"
40 * THIS SOFTWARE IS PROVIDED BY THE OpenSSL PROJECT ``AS IS'' AND ANY
41 * EXPRESSED OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
42 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
43 * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE OpenSSL PROJECT OR
44 * ITS CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
45 * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
46 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
47 * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
48 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
49 * STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
50 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED
51 * OF THE POSSIBILITY OF SUCH DAMAGE.
52 * ====================================================================
54 * This product includes cryptographic software written by Eric Young
55 * (eay@cryptsoft.com). This product includes software written by Tim
56 * Hudson (tjh@cryptsoft.com).
59 /* Copyright (C) 1995-1998 Eric Young (eay@cryptsoft.com)
60 * All rights reserved.
62 * This package is an SSL implementation written
63 * by Eric Young (eay@cryptsoft.com).
64 * The implementation was written so as to conform with Netscapes SSL.
66 * This library is free for commercial and non-commercial use as long as
67 * the following conditions are aheared to. The following conditions
68 * apply to all code found in this distribution, be it the RC4, RSA,
69 * lhash, DES, etc., code; not just the SSL code. The SSL documentation
70 * included with this distribution is covered by the same copyright terms
71 * except that the holder is Tim Hudson (tjh@cryptsoft.com).
73 * Copyright remains Eric Young's, and as such any Copyright notices in
74 * the code are not to be removed.
75 * If this package is used in a product, Eric Young should be given attribution
76 * as the author of the parts of the library used.
77 * This can be in the form of a textual message at program startup or
78 * in documentation (online or textual) provided with the package.
80 * Redistribution and use in source and binary forms, with or without
81 * modification, are permitted provided that the following conditions
83 * 1. Redistributions of source code must retain the copyright
84 * notice, this list of conditions and the following disclaimer.
85 * 2. Redistributions in binary form must reproduce the above copyright
86 * notice, this list of conditions and the following disclaimer in the
87 * documentation and/or other materials provided with the distribution.
88 * 3. All advertising materials mentioning features or use of this software
89 * must display the following acknowledgement:
90 * "This product includes cryptographic software written by
91 * Eric Young (eay@cryptsoft.com)"
92 * The word 'cryptographic' can be left out if the rouines from the library
93 * being used are not cryptographic related :-).
94 * 4. If you include any Windows specific code (or a derivative thereof) from
95 * the apps directory (application code) you must include an acknowledgement:
96 * "This product includes software written by Tim Hudson (tjh@cryptsoft.com)"
98 * THIS SOFTWARE IS PROVIDED BY ERIC YOUNG ``AS IS'' AND
99 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
100 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
101 * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
102 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
103 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
104 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
105 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
106 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
107 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
110 * The licence and distribution terms for any publically available version or
111 * derivative of this code cannot be changed. i.e. this code cannot simply be
112 * copied and put under another distribution licence
113 * [including the GNU Public Licence.]
117 #include "ssl_locl.h"
118 #include <openssl/buffer.h>
119 #include <openssl/rand.h>
120 #include <openssl/objects.h>
121 #include <openssl/evp.h>
122 #include <openssl/md5.h>
123 #ifndef OPENSSL_NO_DH
124 #include <openssl/dh.h>
127 static const SSL_METHOD *dtls1_get_client_method(int ver);
128 static int dtls1_get_hello_verify(SSL *s);
130 static const SSL_METHOD *dtls1_get_client_method(int ver)
132 if (ver == DTLS1_VERSION)
133 return(DTLSv1_client_method());
138 IMPLEMENT_dtls1_meth_func(DTLSv1_client_method,
139 ssl_undefined_function,
141 dtls1_get_client_method)
143 int dtls1_connect(SSL *s)
146 unsigned long Time=(unsigned long)time(NULL);
148 void (*cb)(const SSL *ssl,int type,int val)=NULL;
150 int new_state,state,skip=0;;
152 RAND_add(&Time,sizeof(Time),0);
156 if (s->info_callback != NULL)
158 else if (s->ctx->info_callback != NULL)
159 cb=s->ctx->info_callback;
162 if (!SSL_in_init(s) || SSL_in_before(s)) SSL_clear(s);
170 case SSL_ST_RENEGOTIATE:
172 s->state=SSL_ST_CONNECT;
173 s->ctx->stats.sess_connect_renegotiate++;
177 case SSL_ST_BEFORE|SSL_ST_CONNECT:
178 case SSL_ST_OK|SSL_ST_CONNECT:
181 if (cb != NULL) cb(s,SSL_CB_HANDSHAKE_START,1);
183 if ((s->version & 0xff00 ) != (DTLS1_VERSION & 0xff00))
185 SSLerr(SSL_F_DTLS1_CONNECT, ERR_R_INTERNAL_ERROR);
190 /* s->version=SSL3_VERSION; */
191 s->type=SSL_ST_CONNECT;
193 if (s->init_buf == NULL)
195 if ((buf=BUF_MEM_new()) == NULL)
200 if (!BUF_MEM_grow(buf,SSL3_RT_MAX_PLAIN_LENGTH))
209 if (!ssl3_setup_buffers(s)) { ret= -1; goto end; }
211 /* setup buffing BIO */
212 if (!ssl_init_wbio_buffer(s,0)) { ret= -1; goto end; }
214 /* don't push the buffering BIO quite yet */
216 s->state=SSL3_ST_CW_CLNT_HELLO_A;
217 s->ctx->stats.sess_connect++;
219 /* mark client_random uninitialized */
220 memset(s->s3->client_random,0,sizeof(s->s3->client_random));
223 case SSL3_ST_CW_CLNT_HELLO_A:
224 case SSL3_ST_CW_CLNT_HELLO_B:
228 /* every DTLS ClientHello resets Finished MAC */
229 ssl3_init_finished_mac(s);
231 ret=dtls1_client_hello(s);
232 if (ret <= 0) goto end;
234 if ( s->d1->send_cookie)
236 s->state=SSL3_ST_CW_FLUSH;
237 s->s3->tmp.next_state=SSL3_ST_CR_SRVR_HELLO_A;
240 s->state=SSL3_ST_CR_SRVR_HELLO_A;
244 /* turn on buffering for the next lot of output */
245 if (s->bbio != s->wbio)
246 s->wbio=BIO_push(s->bbio,s->wbio);
250 case SSL3_ST_CR_SRVR_HELLO_A:
251 case SSL3_ST_CR_SRVR_HELLO_B:
252 ret=ssl3_get_server_hello(s);
253 if (ret <= 0) goto end;
257 s->state=SSL3_ST_CR_FINISHED_A;
259 s->state=DTLS1_ST_CR_HELLO_VERIFY_REQUEST_A;
264 case DTLS1_ST_CR_HELLO_VERIFY_REQUEST_A:
265 case DTLS1_ST_CR_HELLO_VERIFY_REQUEST_B:
267 ret = dtls1_get_hello_verify(s);
270 if ( s->d1->send_cookie) /* start again, with a cookie */
271 s->state=SSL3_ST_CW_CLNT_HELLO_A;
273 s->state = SSL3_ST_CR_CERT_A;
277 case SSL3_ST_CR_CERT_A:
278 case SSL3_ST_CR_CERT_B:
279 /* Check if it is anon DH */
280 if (!(s->s3->tmp.new_cipher->algorithm_auth & SSL_aNULL))
282 ret=ssl3_get_server_certificate(s);
283 if (ret <= 0) goto end;
287 s->state=SSL3_ST_CR_KEY_EXCH_A;
291 case SSL3_ST_CR_KEY_EXCH_A:
292 case SSL3_ST_CR_KEY_EXCH_B:
293 ret=ssl3_get_key_exchange(s);
294 if (ret <= 0) goto end;
295 s->state=SSL3_ST_CR_CERT_REQ_A;
298 /* at this point we check that we have the
299 * required stuff from the server */
300 if (!ssl3_check_cert_and_algorithm(s))
307 case SSL3_ST_CR_CERT_REQ_A:
308 case SSL3_ST_CR_CERT_REQ_B:
309 ret=ssl3_get_certificate_request(s);
310 if (ret <= 0) goto end;
311 s->state=SSL3_ST_CR_SRVR_DONE_A;
315 case SSL3_ST_CR_SRVR_DONE_A:
316 case SSL3_ST_CR_SRVR_DONE_B:
317 ret=ssl3_get_server_done(s);
318 if (ret <= 0) goto end;
319 if (s->s3->tmp.cert_req)
320 s->state=SSL3_ST_CW_CERT_A;
322 s->state=SSL3_ST_CW_KEY_EXCH_A;
327 case SSL3_ST_CW_CERT_A:
328 case SSL3_ST_CW_CERT_B:
329 case SSL3_ST_CW_CERT_C:
330 case SSL3_ST_CW_CERT_D:
331 ret=dtls1_send_client_certificate(s);
332 if (ret <= 0) goto end;
333 s->state=SSL3_ST_CW_KEY_EXCH_A;
337 case SSL3_ST_CW_KEY_EXCH_A:
338 case SSL3_ST_CW_KEY_EXCH_B:
339 ret=dtls1_send_client_key_exchange(s);
340 if (ret <= 0) goto end;
341 /* EAY EAY EAY need to check for DH fix cert
343 /* For TLS, cert_req is set to 2, so a cert chain
344 * of nothing is sent, but no verify packet is sent */
345 if (s->s3->tmp.cert_req == 1)
347 s->state=SSL3_ST_CW_CERT_VRFY_A;
351 s->state=SSL3_ST_CW_CHANGE_A;
352 s->s3->change_cipher_spec=0;
358 case SSL3_ST_CW_CERT_VRFY_A:
359 case SSL3_ST_CW_CERT_VRFY_B:
360 ret=dtls1_send_client_verify(s);
361 if (ret <= 0) goto end;
362 s->state=SSL3_ST_CW_CHANGE_A;
364 s->s3->change_cipher_spec=0;
367 case SSL3_ST_CW_CHANGE_A:
368 case SSL3_ST_CW_CHANGE_B:
369 ret=dtls1_send_change_cipher_spec(s,
370 SSL3_ST_CW_CHANGE_A,SSL3_ST_CW_CHANGE_B);
371 if (ret <= 0) goto end;
372 s->state=SSL3_ST_CW_FINISHED_A;
375 s->session->cipher=s->s3->tmp.new_cipher;
376 #ifdef OPENSSL_NO_COMP
377 s->session->compress_meth=0;
379 if (s->s3->tmp.new_compression == NULL)
380 s->session->compress_meth=0;
382 s->session->compress_meth=
383 s->s3->tmp.new_compression->id;
385 if (!s->method->ssl3_enc->setup_key_block(s))
391 if (!s->method->ssl3_enc->change_cipher_state(s,
392 SSL3_CHANGE_CIPHER_CLIENT_WRITE))
398 dtls1_reset_seq_numbers(s, SSL3_CC_WRITE);
401 case SSL3_ST_CW_FINISHED_A:
402 case SSL3_ST_CW_FINISHED_B:
403 ret=dtls1_send_finished(s,
404 SSL3_ST_CW_FINISHED_A,SSL3_ST_CW_FINISHED_B,
405 s->method->ssl3_enc->client_finished_label,
406 s->method->ssl3_enc->client_finished_label_len);
407 if (ret <= 0) goto end;
408 s->state=SSL3_ST_CW_FLUSH;
411 s->s3->flags&= ~SSL3_FLAGS_POP_BUFFER;
414 s->s3->tmp.next_state=SSL_ST_OK;
415 if (s->s3->flags & SSL3_FLAGS_DELAY_CLIENT_FINISHED)
418 s->s3->flags|=SSL3_FLAGS_POP_BUFFER;
419 s->s3->delay_buf_pop_ret=0;
424 s->s3->tmp.next_state=SSL3_ST_CR_FINISHED_A;
427 /* mark client_random uninitialized */
428 memset (s->s3->client_random,0,sizeof(s->s3->client_random));
431 case SSL3_ST_CR_FINISHED_A:
432 case SSL3_ST_CR_FINISHED_B:
434 ret=ssl3_get_finished(s,SSL3_ST_CR_FINISHED_A,
435 SSL3_ST_CR_FINISHED_B);
436 if (ret <= 0) goto end;
439 s->state=SSL3_ST_CW_CHANGE_A;
445 case SSL3_ST_CW_FLUSH:
446 /* number of bytes to be flushed */
447 num1=BIO_ctrl(s->wbio,BIO_CTRL_INFO,0,NULL);
450 s->rwstate=SSL_WRITING;
451 num1=BIO_flush(s->wbio);
452 if (num1 <= 0) { ret= -1; goto end; }
453 s->rwstate=SSL_NOTHING;
456 s->state=s->s3->tmp.next_state;
460 /* clean a few things up */
461 ssl3_cleanup_key_block(s);
464 if (s->init_buf != NULL)
466 BUF_MEM_free(s->init_buf);
471 /* If we are not 'joining' the last two packets,
472 * remove the buffering now */
473 if (!(s->s3->flags & SSL3_FLAGS_POP_BUFFER))
474 ssl_free_wbio_buffer(s);
475 /* else do it later in ssl3_write */
480 ssl_update_cache(s,SSL_SESS_CACHE_CLIENT);
481 if (s->hit) s->ctx->stats.sess_hit++;
485 s->handshake_func=dtls1_connect;
486 s->ctx->stats.sess_connect_good++;
488 if (cb != NULL) cb(s,SSL_CB_HANDSHAKE_DONE,1);
490 /* done with handshaking */
491 s->d1->handshake_read_seq = 0;
496 SSLerr(SSL_F_DTLS1_CONNECT,SSL_R_UNKNOWN_STATE);
502 /* did we do anything */
503 if (!s->s3->tmp.reuse_message && !skip)
507 if ((ret=BIO_flush(s->wbio)) <= 0)
511 if ((cb != NULL) && (s->state != state))
515 cb(s,SSL_CB_CONNECT_LOOP,1);
526 cb(s,SSL_CB_CONNECT_EXIT,ret);
530 int dtls1_client_hello(SSL *s)
535 unsigned long Time,l;
538 buf=(unsigned char *)s->init_buf->data;
539 if (s->state == SSL3_ST_CW_CLNT_HELLO_A)
541 if ((s->session == NULL) ||
542 (s->session->ssl_version != s->version) ||
543 (s->session->not_resumable))
545 if (!ssl_get_new_session(s,0))
548 /* else use the pre-loaded session */
550 p=s->s3->client_random;
552 /* if client_random is initialized, reuse it, we are
553 * required to use same upon reply to HelloVerify */
554 for (i=0;p[i]=='\0' && i<sizeof(s->s3->client_random);i++) ;
555 if (i==sizeof(s->s3->client_random))
557 Time=(unsigned long)time(NULL); /* Time */
559 RAND_pseudo_bytes(p,sizeof(s->s3->client_random)-4);
562 /* Do the message type and length last */
563 d=p= &(buf[DTLS1_HM_HEADER_LENGTH]);
565 *(p++)=s->version>>8;
566 *(p++)=s->version&0xff;
567 s->client_version=s->version;
570 memcpy(p,s->s3->client_random,SSL3_RANDOM_SIZE);
577 i=s->session->session_id_length;
581 if (i > sizeof s->session->session_id)
583 SSLerr(SSL_F_DTLS1_CLIENT_HELLO, ERR_R_INTERNAL_ERROR);
586 memcpy(p,s->session->session_id,i);
591 if ( s->d1->cookie_len > sizeof(s->d1->cookie))
593 SSLerr(SSL_F_DTLS1_CLIENT_HELLO, ERR_R_INTERNAL_ERROR);
596 *(p++) = s->d1->cookie_len;
597 memcpy(p, s->d1->cookie, s->d1->cookie_len);
598 p += s->d1->cookie_len;
600 /* Ciphers supported */
601 i=ssl_cipher_list_to_bytes(s,SSL_get_ciphers(s),&(p[2]),0);
604 SSLerr(SSL_F_DTLS1_CLIENT_HELLO,SSL_R_NO_CIPHERS_AVAILABLE);
611 if (s->ctx->comp_methods == NULL)
614 j=sk_SSL_COMP_num(s->ctx->comp_methods);
618 comp=sk_SSL_COMP_value(s->ctx->comp_methods,i);
621 *(p++)=0; /* Add the NULL method */
626 d = dtls1_set_message_header(s, d, SSL3_MT_CLIENT_HELLO, l, 0, l);
628 s->state=SSL3_ST_CW_CLNT_HELLO_B;
629 /* number of bytes to write */
633 /* buffer the message to handle re-xmits */
634 dtls1_buffer_message(s, 0);
637 /* SSL3_ST_CW_CLNT_HELLO_B */
638 return(dtls1_do_write(s,SSL3_RT_HANDSHAKE));
643 static int dtls1_get_hello_verify(SSL *s)
647 unsigned int cookie_len;
649 n=s->method->ssl_get_message(s,
650 DTLS1_ST_CR_HELLO_VERIFY_REQUEST_A,
651 DTLS1_ST_CR_HELLO_VERIFY_REQUEST_B,
656 if (!ok) return((int)n);
658 if (s->s3->tmp.message_type != DTLS1_MT_HELLO_VERIFY_REQUEST)
660 s->d1->send_cookie = 0;
661 s->s3->tmp.reuse_message=1;
665 data = (unsigned char *)s->init_msg;
667 if ((data[0] != (s->version>>8)) || (data[1] != (s->version&0xff)))
669 SSLerr(SSL_F_DTLS1_GET_HELLO_VERIFY,SSL_R_WRONG_SSL_VERSION);
670 s->version=(s->version&0xff00)|data[1];
671 al = SSL_AD_PROTOCOL_VERSION;
676 cookie_len = *(data++);
677 if ( cookie_len > sizeof(s->d1->cookie))
679 al=SSL_AD_ILLEGAL_PARAMETER;
683 memcpy(s->d1->cookie, data, cookie_len);
684 s->d1->cookie_len = cookie_len;
686 s->d1->send_cookie = 1;
690 ssl3_send_alert(s, SSL3_AL_FATAL, al);
694 int dtls1_send_client_key_exchange(SSL *s)
699 #ifndef OPENSSL_NO_RSA
703 #ifndef OPENSSL_NO_KRB5
705 #endif /* OPENSSL_NO_KRB5 */
707 if (s->state == SSL3_ST_CW_KEY_EXCH_A)
709 d=(unsigned char *)s->init_buf->data;
710 p= &(d[DTLS1_HM_HEADER_LENGTH]);
712 alg_k=s->s3->tmp.new_cipher->algorithm_mkey;
714 /* Fool emacs indentation */
716 #ifndef OPENSSL_NO_RSA
717 else if (alg_k & SSL_kRSA)
720 unsigned char tmp_buf[SSL_MAX_MASTER_KEY_LENGTH];
722 if (s->session->sess_cert->peer_rsa_tmp != NULL)
723 rsa=s->session->sess_cert->peer_rsa_tmp;
726 pkey=X509_get_pubkey(s->session->sess_cert->peer_pkeys[SSL_PKEY_RSA_ENC].x509);
727 if ((pkey == NULL) ||
728 (pkey->type != EVP_PKEY_RSA) ||
729 (pkey->pkey.rsa == NULL))
731 SSLerr(SSL_F_DTLS1_SEND_CLIENT_KEY_EXCHANGE,ERR_R_INTERNAL_ERROR);
738 tmp_buf[0]=s->client_version>>8;
739 tmp_buf[1]=s->client_version&0xff;
740 if (RAND_bytes(&(tmp_buf[2]),sizeof tmp_buf-2) <= 0)
743 s->session->master_key_length=sizeof tmp_buf;
746 /* Fix buf for TLS and [incidentally] DTLS */
747 if (s->version > SSL3_VERSION)
749 n=RSA_public_encrypt(sizeof tmp_buf,
750 tmp_buf,p,rsa,RSA_PKCS1_PADDING);
752 if (s->options & SSL_OP_PKCS1_CHECK_1) p[1]++;
753 if (s->options & SSL_OP_PKCS1_CHECK_2) tmp_buf[0]=0x70;
757 SSLerr(SSL_F_DTLS1_SEND_CLIENT_KEY_EXCHANGE,SSL_R_BAD_RSA_ENCRYPT);
761 /* Fix buf for TLS and [incidentally] DTLS */
762 if (s->version > SSL3_VERSION)
768 s->session->master_key_length=
769 s->method->ssl3_enc->generate_master_secret(s,
770 s->session->master_key,
771 tmp_buf,sizeof tmp_buf);
772 OPENSSL_cleanse(tmp_buf,sizeof tmp_buf);
775 #ifndef OPENSSL_NO_KRB5
776 else if (alg_k & SSL_kKRB5)
778 krb5_error_code krb5rc;
779 KSSL_CTX *kssl_ctx = s->kssl_ctx;
780 /* krb5_data krb5_ap_req; */
781 krb5_data *enc_ticket;
782 krb5_data authenticator, *authp = NULL;
783 EVP_CIPHER_CTX ciph_ctx;
784 EVP_CIPHER *enc = NULL;
785 unsigned char iv[EVP_MAX_IV_LENGTH];
786 unsigned char tmp_buf[SSL_MAX_MASTER_KEY_LENGTH];
787 unsigned char epms[SSL_MAX_MASTER_KEY_LENGTH
788 + EVP_MAX_IV_LENGTH];
789 int padl, outl = sizeof(epms);
791 EVP_CIPHER_CTX_init(&ciph_ctx);
794 printf("ssl3_send_client_key_exchange(%lx & %lx)\n",
796 #endif /* KSSL_DEBUG */
800 if (KRB5SENDAUTH) authp = &authenticator;
801 #endif /* KRB5SENDAUTH */
803 krb5rc = kssl_cget_tkt(kssl_ctx, &enc_ticket, authp,
805 enc = kssl_map_enc(kssl_ctx->enctype);
810 printf("kssl_cget_tkt rtn %d\n", krb5rc);
811 if (krb5rc && kssl_err.text)
812 printf("kssl_cget_tkt kssl_err=%s\n", kssl_err.text);
814 #endif /* KSSL_DEBUG */
818 ssl3_send_alert(s,SSL3_AL_FATAL,
819 SSL_AD_HANDSHAKE_FAILURE);
820 SSLerr(SSL_F_DTLS1_SEND_CLIENT_KEY_EXCHANGE,
825 /* 20010406 VRS - Earlier versions used KRB5 AP_REQ
826 ** in place of RFC 2712 KerberosWrapper, as in:
828 ** Send ticket (copy to *p, set n = length)
829 ** n = krb5_ap_req.length;
830 ** memcpy(p, krb5_ap_req.data, krb5_ap_req.length);
831 ** if (krb5_ap_req.data)
832 ** kssl_krb5_free_data_contents(NULL,&krb5_ap_req);
834 ** Now using real RFC 2712 KerberosWrapper
835 ** (Thanks to Simon Wilkinson <sxw@sxw.org.uk>)
836 ** Note: 2712 "opaque" types are here replaced
837 ** with a 2-byte length followed by the value.
839 ** KerberosWrapper= xx xx asn1ticket 0 0 xx xx encpms
840 ** Where "xx xx" = length bytes. Shown here with
841 ** optional authenticator omitted.
844 /* KerberosWrapper.Ticket */
845 s2n(enc_ticket->length,p);
846 memcpy(p, enc_ticket->data, enc_ticket->length);
847 p+= enc_ticket->length;
848 n = enc_ticket->length + 2;
850 /* KerberosWrapper.Authenticator */
851 if (authp && authp->length)
853 s2n(authp->length,p);
854 memcpy(p, authp->data, authp->length);
856 n+= authp->length + 2;
864 s2n(0,p);/* null authenticator length */
868 if (RAND_bytes(tmp_buf,sizeof tmp_buf) <= 0)
871 /* 20010420 VRS. Tried it this way; failed.
872 ** EVP_EncryptInit_ex(&ciph_ctx,enc, NULL,NULL);
873 ** EVP_CIPHER_CTX_set_key_length(&ciph_ctx,
874 ** kssl_ctx->length);
875 ** EVP_EncryptInit_ex(&ciph_ctx,NULL, key,iv);
878 memset(iv, 0, sizeof iv); /* per RFC 1510 */
879 EVP_EncryptInit_ex(&ciph_ctx,enc, NULL,
881 EVP_EncryptUpdate(&ciph_ctx,epms,&outl,tmp_buf,
883 EVP_EncryptFinal_ex(&ciph_ctx,&(epms[outl]),&padl);
885 if (outl > sizeof epms)
887 SSLerr(SSL_F_DTLS1_SEND_CLIENT_KEY_EXCHANGE, ERR_R_INTERNAL_ERROR);
890 EVP_CIPHER_CTX_cleanup(&ciph_ctx);
892 /* KerberosWrapper.EncryptedPreMasterSecret */
894 memcpy(p, epms, outl);
898 s->session->master_key_length=
899 s->method->ssl3_enc->generate_master_secret(s,
900 s->session->master_key,
901 tmp_buf, sizeof tmp_buf);
903 OPENSSL_cleanse(tmp_buf, sizeof tmp_buf);
904 OPENSSL_cleanse(epms, outl);
907 #ifndef OPENSSL_NO_DH
908 else if (alg_k & (SSL_kEDH|SSL_kDHr|SSL_kDHd))
910 DH *dh_srvr,*dh_clnt;
912 if (s->session->sess_cert->peer_dh_tmp != NULL)
913 dh_srvr=s->session->sess_cert->peer_dh_tmp;
916 /* we get them from the cert */
917 ssl3_send_alert(s,SSL3_AL_FATAL,SSL_AD_HANDSHAKE_FAILURE);
918 SSLerr(SSL_F_DTLS1_SEND_CLIENT_KEY_EXCHANGE,SSL_R_UNABLE_TO_FIND_DH_PARAMETERS);
922 /* generate a new random key */
923 if ((dh_clnt=DHparams_dup(dh_srvr)) == NULL)
925 SSLerr(SSL_F_DTLS1_SEND_CLIENT_KEY_EXCHANGE,ERR_R_DH_LIB);
928 if (!DH_generate_key(dh_clnt))
930 SSLerr(SSL_F_DTLS1_SEND_CLIENT_KEY_EXCHANGE,ERR_R_DH_LIB);
934 /* use the 'p' output buffer for the DH key, but
935 * make sure to clear it out afterwards */
937 n=DH_compute_key(p,dh_srvr->pub_key,dh_clnt);
941 SSLerr(SSL_F_DTLS1_SEND_CLIENT_KEY_EXCHANGE,ERR_R_DH_LIB);
945 /* generate master key from the result */
946 s->session->master_key_length=
947 s->method->ssl3_enc->generate_master_secret(s,
948 s->session->master_key,p,n);
952 /* send off the data */
953 n=BN_num_bytes(dh_clnt->pub_key);
955 BN_bn2bin(dh_clnt->pub_key,p);
960 /* perhaps clean things up a bit EAY EAY EAY EAY*/
965 ssl3_send_alert(s,SSL3_AL_FATAL,SSL_AD_HANDSHAKE_FAILURE);
966 SSLerr(SSL_F_DTLS1_SEND_CLIENT_KEY_EXCHANGE,ERR_R_INTERNAL_ERROR);
970 d = dtls1_set_message_header(s, d,
971 SSL3_MT_CLIENT_KEY_EXCHANGE, n, 0, n);
973 *(d++)=SSL3_MT_CLIENT_KEY_EXCHANGE;
975 l2n(s->d1->handshake_write_seq,d);
976 s->d1->handshake_write_seq++;
979 s->state=SSL3_ST_CW_KEY_EXCH_B;
980 /* number of bytes to write */
981 s->init_num=n+DTLS1_HM_HEADER_LENGTH;
984 /* buffer the message to handle re-xmits */
985 dtls1_buffer_message(s, 0);
988 /* SSL3_ST_CW_KEY_EXCH_B */
989 return(dtls1_do_write(s,SSL3_RT_HANDSHAKE));
994 int dtls1_send_client_verify(SSL *s)
997 unsigned char data[MD5_DIGEST_LENGTH+SHA_DIGEST_LENGTH];
999 #ifndef OPENSSL_NO_RSA
1003 #ifndef OPENSSL_NO_DSA
1007 if (s->state == SSL3_ST_CW_CERT_VRFY_A)
1009 d=(unsigned char *)s->init_buf->data;
1010 p= &(d[DTLS1_HM_HEADER_LENGTH]);
1011 pkey=s->cert->key->privatekey;
1013 s->method->ssl3_enc->cert_verify_mac(s,
1015 &(data[MD5_DIGEST_LENGTH]));
1017 #ifndef OPENSSL_NO_RSA
1018 if (pkey->type == EVP_PKEY_RSA)
1020 s->method->ssl3_enc->cert_verify_mac(s,
1023 if (RSA_sign(NID_md5_sha1, data,
1024 MD5_DIGEST_LENGTH+SHA_DIGEST_LENGTH,
1025 &(p[2]), &u, pkey->pkey.rsa) <= 0 )
1027 SSLerr(SSL_F_DTLS1_SEND_CLIENT_VERIFY,ERR_R_RSA_LIB);
1035 #ifndef OPENSSL_NO_DSA
1036 if (pkey->type == EVP_PKEY_DSA)
1038 if (!DSA_sign(pkey->save_type,
1039 &(data[MD5_DIGEST_LENGTH]),
1040 SHA_DIGEST_LENGTH,&(p[2]),
1041 (unsigned int *)&j,pkey->pkey.dsa))
1043 SSLerr(SSL_F_DTLS1_SEND_CLIENT_VERIFY,ERR_R_DSA_LIB);
1052 SSLerr(SSL_F_DTLS1_SEND_CLIENT_VERIFY,ERR_R_INTERNAL_ERROR);
1056 d = dtls1_set_message_header(s, d,
1057 SSL3_MT_CERTIFICATE_VERIFY, n, 0, n) ;
1059 s->init_num=(int)n+DTLS1_HM_HEADER_LENGTH;
1062 /* buffer the message to handle re-xmits */
1063 dtls1_buffer_message(s, 0);
1065 s->state = SSL3_ST_CW_CERT_VRFY_B;
1068 /* s->state = SSL3_ST_CW_CERT_VRFY_B */
1069 return(dtls1_do_write(s,SSL3_RT_HANDSHAKE));
1074 int dtls1_send_client_certificate(SSL *s)
1077 EVP_PKEY *pkey=NULL;
1081 if (s->state == SSL3_ST_CW_CERT_A)
1083 if ((s->cert == NULL) ||
1084 (s->cert->key->x509 == NULL) ||
1085 (s->cert->key->privatekey == NULL))
1086 s->state=SSL3_ST_CW_CERT_B;
1088 s->state=SSL3_ST_CW_CERT_C;
1091 /* We need to get a client cert */
1092 if (s->state == SSL3_ST_CW_CERT_B)
1094 /* If we get an error, we need to
1095 * ssl->rwstate=SSL_X509_LOOKUP; return(-1);
1096 * We then get retied later */
1098 if (s->ctx->client_cert_cb != NULL)
1099 i=s->ctx->client_cert_cb(s,&(x509),&(pkey));
1102 s->rwstate=SSL_X509_LOOKUP;
1105 s->rwstate=SSL_NOTHING;
1106 if ((i == 1) && (pkey != NULL) && (x509 != NULL))
1108 s->state=SSL3_ST_CW_CERT_B;
1109 if ( !SSL_use_certificate(s,x509) ||
1110 !SSL_use_PrivateKey(s,pkey))
1116 SSLerr(SSL_F_DTLS1_SEND_CLIENT_CERTIFICATE,SSL_R_BAD_DATA_RETURNED_BY_CALLBACK);
1119 if (x509 != NULL) X509_free(x509);
1120 if (pkey != NULL) EVP_PKEY_free(pkey);
1123 if (s->version == SSL3_VERSION)
1125 s->s3->tmp.cert_req=0;
1126 ssl3_send_alert(s,SSL3_AL_WARNING,SSL_AD_NO_CERTIFICATE);
1131 s->s3->tmp.cert_req=2;
1135 /* Ok, we have a cert */
1136 s->state=SSL3_ST_CW_CERT_C;
1139 if (s->state == SSL3_ST_CW_CERT_C)
1141 s->state=SSL3_ST_CW_CERT_D;
1142 l=dtls1_output_cert_chain(s,
1143 (s->s3->tmp.cert_req == 2)?NULL:s->cert->key->x509);
1147 /* set header called by dtls1_output_cert_chain() */
1149 /* buffer the message to handle re-xmits */
1150 dtls1_buffer_message(s, 0);
1152 /* SSL3_ST_CW_CERT_D */
1153 return(dtls1_do_write(s,SSL3_RT_HANDSHAKE));