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 #include <openssl/bn.h>
124 #ifndef OPENSSL_NO_DH
125 #include <openssl/dh.h>
128 static const SSL_METHOD *dtls1_get_client_method(int ver);
129 static int dtls1_get_hello_verify(SSL *s);
131 static const SSL_METHOD *dtls1_get_client_method(int ver)
133 if (ver == DTLS1_VERSION)
134 return(DTLSv1_client_method());
139 IMPLEMENT_dtls1_meth_func(DTLSv1_client_method,
140 ssl_undefined_function,
142 dtls1_get_client_method)
144 int dtls1_connect(SSL *s)
147 unsigned long Time=(unsigned long)time(NULL);
149 void (*cb)(const SSL *ssl,int type,int val)=NULL;
151 int new_state,state,skip=0;;
153 RAND_add(&Time,sizeof(Time),0);
157 if (s->info_callback != NULL)
159 else if (s->ctx->info_callback != NULL)
160 cb=s->ctx->info_callback;
163 if (!SSL_in_init(s) || SSL_in_before(s)) SSL_clear(s);
171 case SSL_ST_RENEGOTIATE:
173 s->state=SSL_ST_CONNECT;
174 s->ctx->stats.sess_connect_renegotiate++;
178 case SSL_ST_BEFORE|SSL_ST_CONNECT:
179 case SSL_ST_OK|SSL_ST_CONNECT:
182 if (cb != NULL) cb(s,SSL_CB_HANDSHAKE_START,1);
184 if ((s->version & 0xff00 ) != (DTLS1_VERSION & 0xff00))
186 SSLerr(SSL_F_DTLS1_CONNECT, ERR_R_INTERNAL_ERROR);
191 /* s->version=SSL3_VERSION; */
192 s->type=SSL_ST_CONNECT;
194 if (s->init_buf == NULL)
196 if ((buf=BUF_MEM_new()) == NULL)
201 if (!BUF_MEM_grow(buf,SSL3_RT_MAX_PLAIN_LENGTH))
210 if (!ssl3_setup_buffers(s)) { ret= -1; goto end; }
212 /* setup buffing BIO */
213 if (!ssl_init_wbio_buffer(s,0)) { ret= -1; goto end; }
215 /* don't push the buffering BIO quite yet */
217 s->state=SSL3_ST_CW_CLNT_HELLO_A;
218 s->ctx->stats.sess_connect++;
220 /* mark client_random uninitialized */
221 memset(s->s3->client_random,0,sizeof(s->s3->client_random));
224 case SSL3_ST_CW_CLNT_HELLO_A:
225 case SSL3_ST_CW_CLNT_HELLO_B:
229 /* every DTLS ClientHello resets Finished MAC */
230 ssl3_init_finished_mac(s);
232 ret=dtls1_client_hello(s);
233 if (ret <= 0) goto end;
235 if ( s->d1->send_cookie)
237 s->state=SSL3_ST_CW_FLUSH;
238 s->s3->tmp.next_state=SSL3_ST_CR_SRVR_HELLO_A;
241 s->state=SSL3_ST_CR_SRVR_HELLO_A;
245 /* turn on buffering for the next lot of output */
246 if (s->bbio != s->wbio)
247 s->wbio=BIO_push(s->bbio,s->wbio);
251 case SSL3_ST_CR_SRVR_HELLO_A:
252 case SSL3_ST_CR_SRVR_HELLO_B:
253 ret=ssl3_get_server_hello(s);
254 if (ret <= 0) goto end;
258 s->state=SSL3_ST_CR_FINISHED_A;
260 s->state=DTLS1_ST_CR_HELLO_VERIFY_REQUEST_A;
265 case DTLS1_ST_CR_HELLO_VERIFY_REQUEST_A:
266 case DTLS1_ST_CR_HELLO_VERIFY_REQUEST_B:
268 ret = dtls1_get_hello_verify(s);
271 if ( s->d1->send_cookie) /* start again, with a cookie */
272 s->state=SSL3_ST_CW_CLNT_HELLO_A;
274 s->state = SSL3_ST_CR_CERT_A;
278 case SSL3_ST_CR_CERT_A:
279 case SSL3_ST_CR_CERT_B:
280 /* Check if it is anon DH */
281 if (!(s->s3->tmp.new_cipher->algorithm_auth & SSL_aNULL))
283 ret=ssl3_get_server_certificate(s);
284 if (ret <= 0) goto end;
288 s->state=SSL3_ST_CR_KEY_EXCH_A;
292 case SSL3_ST_CR_KEY_EXCH_A:
293 case SSL3_ST_CR_KEY_EXCH_B:
294 ret=ssl3_get_key_exchange(s);
295 if (ret <= 0) goto end;
296 s->state=SSL3_ST_CR_CERT_REQ_A;
299 /* at this point we check that we have the
300 * required stuff from the server */
301 if (!ssl3_check_cert_and_algorithm(s))
308 case SSL3_ST_CR_CERT_REQ_A:
309 case SSL3_ST_CR_CERT_REQ_B:
310 ret=ssl3_get_certificate_request(s);
311 if (ret <= 0) goto end;
312 s->state=SSL3_ST_CR_SRVR_DONE_A;
316 case SSL3_ST_CR_SRVR_DONE_A:
317 case SSL3_ST_CR_SRVR_DONE_B:
318 ret=ssl3_get_server_done(s);
319 if (ret <= 0) goto end;
320 if (s->s3->tmp.cert_req)
321 s->state=SSL3_ST_CW_CERT_A;
323 s->state=SSL3_ST_CW_KEY_EXCH_A;
328 case SSL3_ST_CW_CERT_A:
329 case SSL3_ST_CW_CERT_B:
330 case SSL3_ST_CW_CERT_C:
331 case SSL3_ST_CW_CERT_D:
332 ret=dtls1_send_client_certificate(s);
333 if (ret <= 0) goto end;
334 s->state=SSL3_ST_CW_KEY_EXCH_A;
338 case SSL3_ST_CW_KEY_EXCH_A:
339 case SSL3_ST_CW_KEY_EXCH_B:
340 ret=dtls1_send_client_key_exchange(s);
341 if (ret <= 0) goto end;
342 /* EAY EAY EAY need to check for DH fix cert
344 /* For TLS, cert_req is set to 2, so a cert chain
345 * of nothing is sent, but no verify packet is sent */
346 if (s->s3->tmp.cert_req == 1)
348 s->state=SSL3_ST_CW_CERT_VRFY_A;
352 s->state=SSL3_ST_CW_CHANGE_A;
353 s->s3->change_cipher_spec=0;
359 case SSL3_ST_CW_CERT_VRFY_A:
360 case SSL3_ST_CW_CERT_VRFY_B:
361 ret=dtls1_send_client_verify(s);
362 if (ret <= 0) goto end;
363 s->state=SSL3_ST_CW_CHANGE_A;
365 s->s3->change_cipher_spec=0;
368 case SSL3_ST_CW_CHANGE_A:
369 case SSL3_ST_CW_CHANGE_B:
370 ret=dtls1_send_change_cipher_spec(s,
371 SSL3_ST_CW_CHANGE_A,SSL3_ST_CW_CHANGE_B);
372 if (ret <= 0) goto end;
373 s->state=SSL3_ST_CW_FINISHED_A;
376 s->session->cipher=s->s3->tmp.new_cipher;
377 #ifdef OPENSSL_NO_COMP
378 s->session->compress_meth=0;
380 if (s->s3->tmp.new_compression == NULL)
381 s->session->compress_meth=0;
383 s->session->compress_meth=
384 s->s3->tmp.new_compression->id;
386 if (!s->method->ssl3_enc->setup_key_block(s))
392 if (!s->method->ssl3_enc->change_cipher_state(s,
393 SSL3_CHANGE_CIPHER_CLIENT_WRITE))
399 dtls1_reset_seq_numbers(s, SSL3_CC_WRITE);
402 case SSL3_ST_CW_FINISHED_A:
403 case SSL3_ST_CW_FINISHED_B:
404 ret=dtls1_send_finished(s,
405 SSL3_ST_CW_FINISHED_A,SSL3_ST_CW_FINISHED_B,
406 s->method->ssl3_enc->client_finished_label,
407 s->method->ssl3_enc->client_finished_label_len);
408 if (ret <= 0) goto end;
409 s->state=SSL3_ST_CW_FLUSH;
412 s->s3->flags&= ~SSL3_FLAGS_POP_BUFFER;
415 s->s3->tmp.next_state=SSL_ST_OK;
416 if (s->s3->flags & SSL3_FLAGS_DELAY_CLIENT_FINISHED)
419 s->s3->flags|=SSL3_FLAGS_POP_BUFFER;
420 s->s3->delay_buf_pop_ret=0;
425 s->s3->tmp.next_state=SSL3_ST_CR_FINISHED_A;
428 /* mark client_random uninitialized */
429 memset (s->s3->client_random,0,sizeof(s->s3->client_random));
432 case SSL3_ST_CR_FINISHED_A:
433 case SSL3_ST_CR_FINISHED_B:
435 ret=ssl3_get_finished(s,SSL3_ST_CR_FINISHED_A,
436 SSL3_ST_CR_FINISHED_B);
437 if (ret <= 0) goto end;
440 s->state=SSL3_ST_CW_CHANGE_A;
446 case SSL3_ST_CW_FLUSH:
447 /* number of bytes to be flushed */
448 num1=BIO_ctrl(s->wbio,BIO_CTRL_INFO,0,NULL);
451 s->rwstate=SSL_WRITING;
452 num1=BIO_flush(s->wbio);
453 if (num1 <= 0) { ret= -1; goto end; }
454 s->rwstate=SSL_NOTHING;
457 s->state=s->s3->tmp.next_state;
461 /* clean a few things up */
462 ssl3_cleanup_key_block(s);
465 if (s->init_buf != NULL)
467 BUF_MEM_free(s->init_buf);
472 /* If we are not 'joining' the last two packets,
473 * remove the buffering now */
474 if (!(s->s3->flags & SSL3_FLAGS_POP_BUFFER))
475 ssl_free_wbio_buffer(s);
476 /* else do it later in ssl3_write */
481 ssl_update_cache(s,SSL_SESS_CACHE_CLIENT);
482 if (s->hit) s->ctx->stats.sess_hit++;
486 s->handshake_func=dtls1_connect;
487 s->ctx->stats.sess_connect_good++;
489 if (cb != NULL) cb(s,SSL_CB_HANDSHAKE_DONE,1);
491 /* done with handshaking */
492 s->d1->handshake_read_seq = 0;
497 SSLerr(SSL_F_DTLS1_CONNECT,SSL_R_UNKNOWN_STATE);
503 /* did we do anything */
504 if (!s->s3->tmp.reuse_message && !skip)
508 if ((ret=BIO_flush(s->wbio)) <= 0)
512 if ((cb != NULL) && (s->state != state))
516 cb(s,SSL_CB_CONNECT_LOOP,1);
527 cb(s,SSL_CB_CONNECT_EXIT,ret);
531 int dtls1_client_hello(SSL *s)
536 unsigned long Time,l;
539 buf=(unsigned char *)s->init_buf->data;
540 if (s->state == SSL3_ST_CW_CLNT_HELLO_A)
542 if ((s->session == NULL) ||
543 (s->session->ssl_version != s->version) ||
544 (s->session->not_resumable))
546 if (!ssl_get_new_session(s,0))
549 /* else use the pre-loaded session */
551 p=s->s3->client_random;
553 /* if client_random is initialized, reuse it, we are
554 * required to use same upon reply to HelloVerify */
555 for (i=0;p[i]=='\0' && i<sizeof(s->s3->client_random);i++) ;
556 if (i==sizeof(s->s3->client_random))
558 Time=(unsigned long)time(NULL); /* Time */
560 RAND_pseudo_bytes(p,sizeof(s->s3->client_random)-4);
563 /* Do the message type and length last */
564 d=p= &(buf[DTLS1_HM_HEADER_LENGTH]);
566 *(p++)=s->version>>8;
567 *(p++)=s->version&0xff;
568 s->client_version=s->version;
571 memcpy(p,s->s3->client_random,SSL3_RANDOM_SIZE);
578 i=s->session->session_id_length;
582 if (i > sizeof s->session->session_id)
584 SSLerr(SSL_F_DTLS1_CLIENT_HELLO, ERR_R_INTERNAL_ERROR);
587 memcpy(p,s->session->session_id,i);
592 if ( s->d1->cookie_len > sizeof(s->d1->cookie))
594 SSLerr(SSL_F_DTLS1_CLIENT_HELLO, ERR_R_INTERNAL_ERROR);
597 *(p++) = s->d1->cookie_len;
598 memcpy(p, s->d1->cookie, s->d1->cookie_len);
599 p += s->d1->cookie_len;
601 /* Ciphers supported */
602 i=ssl_cipher_list_to_bytes(s,SSL_get_ciphers(s),&(p[2]),0);
605 SSLerr(SSL_F_DTLS1_CLIENT_HELLO,SSL_R_NO_CIPHERS_AVAILABLE);
612 if (s->ctx->comp_methods == NULL)
615 j=sk_SSL_COMP_num(s->ctx->comp_methods);
619 comp=sk_SSL_COMP_value(s->ctx->comp_methods,i);
622 *(p++)=0; /* Add the NULL method */
627 d = dtls1_set_message_header(s, d, SSL3_MT_CLIENT_HELLO, l, 0, l);
629 s->state=SSL3_ST_CW_CLNT_HELLO_B;
630 /* number of bytes to write */
634 /* buffer the message to handle re-xmits */
635 dtls1_buffer_message(s, 0);
638 /* SSL3_ST_CW_CLNT_HELLO_B */
639 return(dtls1_do_write(s,SSL3_RT_HANDSHAKE));
644 static int dtls1_get_hello_verify(SSL *s)
648 unsigned int cookie_len;
650 n=s->method->ssl_get_message(s,
651 DTLS1_ST_CR_HELLO_VERIFY_REQUEST_A,
652 DTLS1_ST_CR_HELLO_VERIFY_REQUEST_B,
657 if (!ok) return((int)n);
659 if (s->s3->tmp.message_type != DTLS1_MT_HELLO_VERIFY_REQUEST)
661 s->d1->send_cookie = 0;
662 s->s3->tmp.reuse_message=1;
666 data = (unsigned char *)s->init_msg;
668 if ((data[0] != (s->version>>8)) || (data[1] != (s->version&0xff)))
670 SSLerr(SSL_F_DTLS1_GET_HELLO_VERIFY,SSL_R_WRONG_SSL_VERSION);
671 s->version=(s->version&0xff00)|data[1];
672 al = SSL_AD_PROTOCOL_VERSION;
677 cookie_len = *(data++);
678 if ( cookie_len > sizeof(s->d1->cookie))
680 al=SSL_AD_ILLEGAL_PARAMETER;
684 memcpy(s->d1->cookie, data, cookie_len);
685 s->d1->cookie_len = cookie_len;
687 s->d1->send_cookie = 1;
691 ssl3_send_alert(s, SSL3_AL_FATAL, al);
695 int dtls1_send_client_key_exchange(SSL *s)
700 #ifndef OPENSSL_NO_RSA
704 #ifndef OPENSSL_NO_KRB5
706 #endif /* OPENSSL_NO_KRB5 */
708 if (s->state == SSL3_ST_CW_KEY_EXCH_A)
710 d=(unsigned char *)s->init_buf->data;
711 p= &(d[DTLS1_HM_HEADER_LENGTH]);
713 alg_k=s->s3->tmp.new_cipher->algorithm_mkey;
715 /* Fool emacs indentation */
717 #ifndef OPENSSL_NO_RSA
718 else if (alg_k & SSL_kRSA)
721 unsigned char tmp_buf[SSL_MAX_MASTER_KEY_LENGTH];
723 if (s->session->sess_cert->peer_rsa_tmp != NULL)
724 rsa=s->session->sess_cert->peer_rsa_tmp;
727 pkey=X509_get_pubkey(s->session->sess_cert->peer_pkeys[SSL_PKEY_RSA_ENC].x509);
728 if ((pkey == NULL) ||
729 (pkey->type != EVP_PKEY_RSA) ||
730 (pkey->pkey.rsa == NULL))
732 SSLerr(SSL_F_DTLS1_SEND_CLIENT_KEY_EXCHANGE,ERR_R_INTERNAL_ERROR);
739 tmp_buf[0]=s->client_version>>8;
740 tmp_buf[1]=s->client_version&0xff;
741 if (RAND_bytes(&(tmp_buf[2]),sizeof tmp_buf-2) <= 0)
744 s->session->master_key_length=sizeof tmp_buf;
747 /* Fix buf for TLS and [incidentally] DTLS */
748 if (s->version > SSL3_VERSION)
750 n=RSA_public_encrypt(sizeof tmp_buf,
751 tmp_buf,p,rsa,RSA_PKCS1_PADDING);
753 if (s->options & SSL_OP_PKCS1_CHECK_1) p[1]++;
754 if (s->options & SSL_OP_PKCS1_CHECK_2) tmp_buf[0]=0x70;
758 SSLerr(SSL_F_DTLS1_SEND_CLIENT_KEY_EXCHANGE,SSL_R_BAD_RSA_ENCRYPT);
762 /* Fix buf for TLS and [incidentally] DTLS */
763 if (s->version > SSL3_VERSION)
769 s->session->master_key_length=
770 s->method->ssl3_enc->generate_master_secret(s,
771 s->session->master_key,
772 tmp_buf,sizeof tmp_buf);
773 OPENSSL_cleanse(tmp_buf,sizeof tmp_buf);
776 #ifndef OPENSSL_NO_KRB5
777 else if (alg_k & SSL_kKRB5)
779 krb5_error_code krb5rc;
780 KSSL_CTX *kssl_ctx = s->kssl_ctx;
781 /* krb5_data krb5_ap_req; */
782 krb5_data *enc_ticket;
783 krb5_data authenticator, *authp = NULL;
784 EVP_CIPHER_CTX ciph_ctx;
785 EVP_CIPHER *enc = NULL;
786 unsigned char iv[EVP_MAX_IV_LENGTH];
787 unsigned char tmp_buf[SSL_MAX_MASTER_KEY_LENGTH];
788 unsigned char epms[SSL_MAX_MASTER_KEY_LENGTH
789 + EVP_MAX_IV_LENGTH];
790 int padl, outl = sizeof(epms);
792 EVP_CIPHER_CTX_init(&ciph_ctx);
795 printf("ssl3_send_client_key_exchange(%lx & %lx)\n",
797 #endif /* KSSL_DEBUG */
801 if (KRB5SENDAUTH) authp = &authenticator;
802 #endif /* KRB5SENDAUTH */
804 krb5rc = kssl_cget_tkt(kssl_ctx, &enc_ticket, authp,
806 enc = kssl_map_enc(kssl_ctx->enctype);
811 printf("kssl_cget_tkt rtn %d\n", krb5rc);
812 if (krb5rc && kssl_err.text)
813 printf("kssl_cget_tkt kssl_err=%s\n", kssl_err.text);
815 #endif /* KSSL_DEBUG */
819 ssl3_send_alert(s,SSL3_AL_FATAL,
820 SSL_AD_HANDSHAKE_FAILURE);
821 SSLerr(SSL_F_DTLS1_SEND_CLIENT_KEY_EXCHANGE,
826 /* 20010406 VRS - Earlier versions used KRB5 AP_REQ
827 ** in place of RFC 2712 KerberosWrapper, as in:
829 ** Send ticket (copy to *p, set n = length)
830 ** n = krb5_ap_req.length;
831 ** memcpy(p, krb5_ap_req.data, krb5_ap_req.length);
832 ** if (krb5_ap_req.data)
833 ** kssl_krb5_free_data_contents(NULL,&krb5_ap_req);
835 ** Now using real RFC 2712 KerberosWrapper
836 ** (Thanks to Simon Wilkinson <sxw@sxw.org.uk>)
837 ** Note: 2712 "opaque" types are here replaced
838 ** with a 2-byte length followed by the value.
840 ** KerberosWrapper= xx xx asn1ticket 0 0 xx xx encpms
841 ** Where "xx xx" = length bytes. Shown here with
842 ** optional authenticator omitted.
845 /* KerberosWrapper.Ticket */
846 s2n(enc_ticket->length,p);
847 memcpy(p, enc_ticket->data, enc_ticket->length);
848 p+= enc_ticket->length;
849 n = enc_ticket->length + 2;
851 /* KerberosWrapper.Authenticator */
852 if (authp && authp->length)
854 s2n(authp->length,p);
855 memcpy(p, authp->data, authp->length);
857 n+= authp->length + 2;
865 s2n(0,p);/* null authenticator length */
869 if (RAND_bytes(tmp_buf,sizeof tmp_buf) <= 0)
872 /* 20010420 VRS. Tried it this way; failed.
873 ** EVP_EncryptInit_ex(&ciph_ctx,enc, NULL,NULL);
874 ** EVP_CIPHER_CTX_set_key_length(&ciph_ctx,
875 ** kssl_ctx->length);
876 ** EVP_EncryptInit_ex(&ciph_ctx,NULL, key,iv);
879 memset(iv, 0, sizeof iv); /* per RFC 1510 */
880 EVP_EncryptInit_ex(&ciph_ctx,enc, NULL,
882 EVP_EncryptUpdate(&ciph_ctx,epms,&outl,tmp_buf,
884 EVP_EncryptFinal_ex(&ciph_ctx,&(epms[outl]),&padl);
886 if (outl > sizeof epms)
888 SSLerr(SSL_F_DTLS1_SEND_CLIENT_KEY_EXCHANGE, ERR_R_INTERNAL_ERROR);
891 EVP_CIPHER_CTX_cleanup(&ciph_ctx);
893 /* KerberosWrapper.EncryptedPreMasterSecret */
895 memcpy(p, epms, outl);
899 s->session->master_key_length=
900 s->method->ssl3_enc->generate_master_secret(s,
901 s->session->master_key,
902 tmp_buf, sizeof tmp_buf);
904 OPENSSL_cleanse(tmp_buf, sizeof tmp_buf);
905 OPENSSL_cleanse(epms, outl);
908 #ifndef OPENSSL_NO_DH
909 else if (alg_k & (SSL_kEDH|SSL_kDHr|SSL_kDHd))
911 DH *dh_srvr,*dh_clnt;
913 if (s->session->sess_cert->peer_dh_tmp != NULL)
914 dh_srvr=s->session->sess_cert->peer_dh_tmp;
917 /* we get them from the cert */
918 ssl3_send_alert(s,SSL3_AL_FATAL,SSL_AD_HANDSHAKE_FAILURE);
919 SSLerr(SSL_F_DTLS1_SEND_CLIENT_KEY_EXCHANGE,SSL_R_UNABLE_TO_FIND_DH_PARAMETERS);
923 /* generate a new random key */
924 if ((dh_clnt=DHparams_dup(dh_srvr)) == NULL)
926 SSLerr(SSL_F_DTLS1_SEND_CLIENT_KEY_EXCHANGE,ERR_R_DH_LIB);
929 if (!DH_generate_key(dh_clnt))
931 SSLerr(SSL_F_DTLS1_SEND_CLIENT_KEY_EXCHANGE,ERR_R_DH_LIB);
935 /* use the 'p' output buffer for the DH key, but
936 * make sure to clear it out afterwards */
938 n=DH_compute_key(p,dh_srvr->pub_key,dh_clnt);
942 SSLerr(SSL_F_DTLS1_SEND_CLIENT_KEY_EXCHANGE,ERR_R_DH_LIB);
946 /* generate master key from the result */
947 s->session->master_key_length=
948 s->method->ssl3_enc->generate_master_secret(s,
949 s->session->master_key,p,n);
953 /* send off the data */
954 n=BN_num_bytes(dh_clnt->pub_key);
956 BN_bn2bin(dh_clnt->pub_key,p);
961 /* perhaps clean things up a bit EAY EAY EAY EAY*/
966 ssl3_send_alert(s,SSL3_AL_FATAL,SSL_AD_HANDSHAKE_FAILURE);
967 SSLerr(SSL_F_DTLS1_SEND_CLIENT_KEY_EXCHANGE,ERR_R_INTERNAL_ERROR);
971 d = dtls1_set_message_header(s, d,
972 SSL3_MT_CLIENT_KEY_EXCHANGE, n, 0, n);
974 *(d++)=SSL3_MT_CLIENT_KEY_EXCHANGE;
976 l2n(s->d1->handshake_write_seq,d);
977 s->d1->handshake_write_seq++;
980 s->state=SSL3_ST_CW_KEY_EXCH_B;
981 /* number of bytes to write */
982 s->init_num=n+DTLS1_HM_HEADER_LENGTH;
985 /* buffer the message to handle re-xmits */
986 dtls1_buffer_message(s, 0);
989 /* SSL3_ST_CW_KEY_EXCH_B */
990 return(dtls1_do_write(s,SSL3_RT_HANDSHAKE));
995 int dtls1_send_client_verify(SSL *s)
998 unsigned char data[MD5_DIGEST_LENGTH+SHA_DIGEST_LENGTH];
1000 #ifndef OPENSSL_NO_RSA
1004 #ifndef OPENSSL_NO_DSA
1008 if (s->state == SSL3_ST_CW_CERT_VRFY_A)
1010 d=(unsigned char *)s->init_buf->data;
1011 p= &(d[DTLS1_HM_HEADER_LENGTH]);
1012 pkey=s->cert->key->privatekey;
1014 s->method->ssl3_enc->cert_verify_mac(s,
1016 &(data[MD5_DIGEST_LENGTH]));
1018 #ifndef OPENSSL_NO_RSA
1019 if (pkey->type == EVP_PKEY_RSA)
1021 s->method->ssl3_enc->cert_verify_mac(s,
1024 if (RSA_sign(NID_md5_sha1, data,
1025 MD5_DIGEST_LENGTH+SHA_DIGEST_LENGTH,
1026 &(p[2]), &u, pkey->pkey.rsa) <= 0 )
1028 SSLerr(SSL_F_DTLS1_SEND_CLIENT_VERIFY,ERR_R_RSA_LIB);
1036 #ifndef OPENSSL_NO_DSA
1037 if (pkey->type == EVP_PKEY_DSA)
1039 if (!DSA_sign(pkey->save_type,
1040 &(data[MD5_DIGEST_LENGTH]),
1041 SHA_DIGEST_LENGTH,&(p[2]),
1042 (unsigned int *)&j,pkey->pkey.dsa))
1044 SSLerr(SSL_F_DTLS1_SEND_CLIENT_VERIFY,ERR_R_DSA_LIB);
1053 SSLerr(SSL_F_DTLS1_SEND_CLIENT_VERIFY,ERR_R_INTERNAL_ERROR);
1057 d = dtls1_set_message_header(s, d,
1058 SSL3_MT_CERTIFICATE_VERIFY, n, 0, n) ;
1060 s->init_num=(int)n+DTLS1_HM_HEADER_LENGTH;
1063 /* buffer the message to handle re-xmits */
1064 dtls1_buffer_message(s, 0);
1066 s->state = SSL3_ST_CW_CERT_VRFY_B;
1069 /* s->state = SSL3_ST_CW_CERT_VRFY_B */
1070 return(dtls1_do_write(s,SSL3_RT_HANDSHAKE));
1075 int dtls1_send_client_certificate(SSL *s)
1078 EVP_PKEY *pkey=NULL;
1082 if (s->state == SSL3_ST_CW_CERT_A)
1084 if ((s->cert == NULL) ||
1085 (s->cert->key->x509 == NULL) ||
1086 (s->cert->key->privatekey == NULL))
1087 s->state=SSL3_ST_CW_CERT_B;
1089 s->state=SSL3_ST_CW_CERT_C;
1092 /* We need to get a client cert */
1093 if (s->state == SSL3_ST_CW_CERT_B)
1095 /* If we get an error, we need to
1096 * ssl->rwstate=SSL_X509_LOOKUP; return(-1);
1097 * We then get retied later */
1099 i = ssl_do_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));