/* ssl/d1_clnt.c */

/* 

 * DTLS implementation written by Nagendra Modadugu

 * (nagendra@cs.stanford.edu) for the OpenSSL project 2005.  

 */

/* ====================================================================

 * Copyright (c) 1999-2005 The OpenSSL Project.  All rights reserved.

 *

 * Redistribution and use in source and binary forms, with or without

 * modification, are permitted provided that the following conditions

 * are met:

 *

 * 1. Redistributions of source code must retain the above copyright

 *    notice, this list of conditions and the following disclaimer. 

 *

 * 2. Redistributions in binary form must reproduce the above copyright

 *    notice, this list of conditions and the following disclaimer in

 *    the documentation and/or other materials provided with the

 *    distribution.

 *

 * 3. All advertising materials mentioning features or use of this

 *    software must display the following acknowledgment:

 *    "This product includes software developed by the OpenSSL Project

 *    for use in the OpenSSL Toolkit. (http://www.OpenSSL.org/)"

 *

 * 4. The names "OpenSSL Toolkit" and "OpenSSL Project" must not be used to

 *    endorse or promote products derived from this software without

 *    prior written permission. For written permission, please contact

 *    openssl-core@OpenSSL.org.

 *

 * 5. Products derived from this software may not be called "OpenSSL"

 *    nor may "OpenSSL" appear in their names without prior written

 *    permission of the OpenSSL Project.

 *

 * 6. Redistributions of any form whatsoever must retain the following

 *    acknowledgment:

 *    "This product includes software developed by the OpenSSL Project

 *    for use in the OpenSSL Toolkit (http://www.OpenSSL.org/)"

 *

 * THIS SOFTWARE IS PROVIDED BY THE OpenSSL PROJECT ``AS IS'' AND ANY

 * EXPRESSED OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE

 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR

 * PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL THE OpenSSL PROJECT OR

 * ITS CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,

 * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT

 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;

 * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)

 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,

 * STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)

 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED

 * OF THE POSSIBILITY OF SUCH DAMAGE.

 * ====================================================================

 *

 * This product includes cryptographic software written by Eric Young

 * (eay@cryptsoft.com).  This product includes software written by Tim

 * Hudson (tjh@cryptsoft.com).

 *

 */

/* Copyright (C) 1995-1998 Eric Young (eay@cryptsoft.com)

 * All rights reserved.

 *

 * This package is an SSL implementation written

 * by Eric Young (eay@cryptsoft.com).

 * The implementation was written so as to conform with Netscapes SSL.

 * 

 * This library is free for commercial and non-commercial use as long as

 * the following conditions are aheared to.  The following conditions

 * apply to all code found in this distribution, be it the RC4, RSA,

 * lhash, DES, etc., code; not just the SSL code.  The SSL documentation

 * included with this distribution is covered by the same copyright terms

 * except that the holder is Tim Hudson (tjh@cryptsoft.com).

 * 

 * Copyright remains Eric Young's, and as such any Copyright notices in

 * the code are not to be removed.

 * If this package is used in a product, Eric Young should be given attribution

 * as the author of the parts of the library used.

 * This can be in the form of a textual message at program startup or

 * in documentation (online or textual) provided with the package.

 * 

 * Redistribution and use in source and binary forms, with or without

 * modification, are permitted provided that the following conditions

 * are met:

 * 1. Redistributions of source code must retain the copyright

 *    notice, this list of conditions and the following disclaimer.

 * 2. Redistributions in binary form must reproduce the above copyright

 *    notice, this list of conditions and the following disclaimer in the

 *    documentation and/or other materials provided with the distribution.

 * 3. All advertising materials mentioning features or use of this software

 *    must display the following acknowledgement:

 *    "This product includes cryptographic software written by

 *     Eric Young (eay@cryptsoft.com)"

 *    The word 'cryptographic' can be left out if the rouines from the library

 *    being used are not cryptographic related :-).

 * 4. If you include any Windows specific code (or a derivative thereof) from 

 *    the apps directory (application code) you must include an acknowledgement:

 *    "This product includes software written by Tim Hudson (tjh@cryptsoft.com)"

 * 

 * THIS SOFTWARE IS PROVIDED BY ERIC YOUNG ``AS IS'' AND

 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE

 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE

 * ARE DISCLAIMED.  IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE

 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL

 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS

 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)

 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT

 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY

 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF

 * SUCH DAMAGE.

 * 

 * The licence and distribution terms for any publically available version or

 * derivative of this code cannot be changed.  i.e. this code cannot simply be

 * copied and put under another distribution licence

 * [including the GNU Public Licence.]

 */

/*

 © Portions copyright (c) 2006 Nokia Corporation.  All rights reserved.

 */

#include <stdio.h>

#include "ssl_locl.h"

#include "kssl_lcl.h"

#include <openssl/buffer.h>

#include <openssl/rand.h>

#include <openssl/objects.h>

#include <openssl/evp.h>

#include <openssl/md5.h>

#ifndef OPENSSL_NO_DH

#include <openssl/dh.h>

#endif

#if (defined(SYMBIAN) && (defined(__WINSCW__) || defined(__WINS__)))

#include "libssl_wsd.h"

#endif

#ifdef EMULATOR

	GET_STATIC_VAR_FROM_TLS(DTLSv1_client_method_data,d1_clnt,SSL_METHOD)

	#define DTLSv1_client_method_data (*GET_WSD_VAR_NAME(DTLSv1_client_method_data,d1_clnt,s)())

#endif

static SSL_METHOD *dtls1_get_client_method(int ver);

static int dtls1_get_hello_verify(SSL *s);

static SSL_METHOD *dtls1_get_client_method(int ver)

	{

	if (ver == DTLS1_VERSION)

		return(DTLSv1_client_method());

	else

		return(NULL);

	}

EXPORT_C IMPLEMENT_dtls1_meth_func(DTLSv1_client_method,

			ssl_undefined_function,

			dtls1_connect,

			dtls1_get_client_method)

int dtls1_connect(SSL *s)

	{

	BUF_MEM *buf=NULL;

	unsigned long Time=(unsigned long)time(NULL),l;

	long num1;

	void (*cb)(const SSL *ssl,int type,int val)=NULL;

	int ret= -1;

	int new_state,state,skip=0;;

	RAND_add(&Time,sizeof(Time),0);

	ERR_clear_error();

	clear_sys_error();

	if (s->info_callback != NULL)

		cb=s->info_callback;

	else if (s->ctx->info_callback != NULL)

		cb=s->ctx->info_callback;

	s->in_handshake++;

	if (!SSL_in_init(s) || SSL_in_before(s)) SSL_clear(s); 

	for (;;)

		{

		state=s->state;

		switch(s->state)

			{

		case SSL_ST_RENEGOTIATE:

			s->new_session=1;

			s->state=SSL_ST_CONNECT;

			s->ctx->stats.sess_connect_renegotiate++;

			/* break */

		case SSL_ST_BEFORE:

		case SSL_ST_CONNECT:

		case SSL_ST_BEFORE|SSL_ST_CONNECT:

		case SSL_ST_OK|SSL_ST_CONNECT:

			s->server=0;

			if (cb != NULL) cb(s,SSL_CB_HANDSHAKE_START,1);

			if ((s->version & 0xff00 ) != (DTLS1_VERSION & 0xff00))

				{

				SSLerr(SSL_F_DTLS1_CONNECT, ERR_R_INTERNAL_ERROR);

				ret = -1;

				goto end;

				}

			/* s->version=SSL3_VERSION; */

			s->type=SSL_ST_CONNECT;

			if (s->init_buf == NULL)

				{

				if ((buf=BUF_MEM_new()) == NULL)

					{

					ret= -1;

					goto end;

					}

				if (!BUF_MEM_grow(buf,SSL3_RT_MAX_PLAIN_LENGTH))

					{

					ret= -1;

					goto end;

					}

				s->init_buf=buf;

				buf=NULL;

				}

			if (!ssl3_setup_buffers(s)) { ret= -1; goto end; }

			/* setup buffing BIO */

			if (!ssl_init_wbio_buffer(s,0)) { ret= -1; goto end; }

			/* don't push the buffering BIO quite yet */

			s->state=SSL3_ST_CW_CLNT_HELLO_A;

			s->ctx->stats.sess_connect++;

			s->init_num=0;

			/* mark client_random uninitialized */

			memset(s->s3->client_random,0,sizeof(s->s3->client_random));

			break;

		case SSL3_ST_CW_CLNT_HELLO_A:

		case SSL3_ST_CW_CLNT_HELLO_B:

			s->shutdown=0;

			/* every DTLS ClientHello resets Finished MAC */

			ssl3_init_finished_mac(s);

			ret=dtls1_client_hello(s);

			if (ret <= 0) goto end;

			if ( s->d1->send_cookie)

				{

				s->state=SSL3_ST_CW_FLUSH;

				s->s3->tmp.next_state=SSL3_ST_CR_SRVR_HELLO_A;

				}

			else

				s->state=SSL3_ST_CR_SRVR_HELLO_A;

			s->init_num=0;

			/* turn on buffering for the next lot of output */

			if (s->bbio != s->wbio)

				s->wbio=BIO_push(s->bbio,s->wbio);

			break;

		case SSL3_ST_CR_SRVR_HELLO_A:

		case SSL3_ST_CR_SRVR_HELLO_B:

			ret=ssl3_get_server_hello(s);

			if (ret <= 0) goto end;

			else

				{

				if (s->hit)

					s->state=SSL3_ST_CR_FINISHED_A;

				else

					s->state=DTLS1_ST_CR_HELLO_VERIFY_REQUEST_A;

				}

			s->init_num=0;

			break;

		case DTLS1_ST_CR_HELLO_VERIFY_REQUEST_A:

		case DTLS1_ST_CR_HELLO_VERIFY_REQUEST_B:

			ret = dtls1_get_hello_verify(s);

			if ( ret <= 0)

				goto end;

			if ( s->d1->send_cookie) /* start again, with a cookie */

				s->state=SSL3_ST_CW_CLNT_HELLO_A;

			else

				s->state = SSL3_ST_CR_CERT_A;

			s->init_num = 0;

			break;

		case SSL3_ST_CR_CERT_A:

		case SSL3_ST_CR_CERT_B:

			/* Check if it is anon DH */

			if (!(s->s3->tmp.new_cipher->algorithms & SSL_aNULL))

				{

				ret=ssl3_get_server_certificate(s);

				if (ret <= 0) goto end;

				}

			else

				skip=1;

			s->state=SSL3_ST_CR_KEY_EXCH_A;

			s->init_num=0;

			break;

		case SSL3_ST_CR_KEY_EXCH_A:

		case SSL3_ST_CR_KEY_EXCH_B:

			ret=ssl3_get_key_exchange(s);

			if (ret <= 0) goto end;

			s->state=SSL3_ST_CR_CERT_REQ_A;

			s->init_num=0;

			/* at this point we check that we have the

			 * required stuff from the server */

			if (!ssl3_check_cert_and_algorithm(s))

				{

				ret= -1;

				goto end;

				}

			break;

		case SSL3_ST_CR_CERT_REQ_A:

		case SSL3_ST_CR_CERT_REQ_B:

			ret=ssl3_get_certificate_request(s);

			if (ret <= 0) goto end;

			s->state=SSL3_ST_CR_SRVR_DONE_A;

			s->init_num=0;

			break;

		case SSL3_ST_CR_SRVR_DONE_A:

		case SSL3_ST_CR_SRVR_DONE_B:

			ret=ssl3_get_server_done(s);

			if (ret <= 0) goto end;

			if (s->s3->tmp.cert_req)

				s->state=SSL3_ST_CW_CERT_A;

			else

				s->state=SSL3_ST_CW_KEY_EXCH_A;

			s->init_num=0;

			break;

		case SSL3_ST_CW_CERT_A:

		case SSL3_ST_CW_CERT_B:

		case SSL3_ST_CW_CERT_C:

		case SSL3_ST_CW_CERT_D:

			ret=dtls1_send_client_certificate(s);

			if (ret <= 0) goto end;

			s->state=SSL3_ST_CW_KEY_EXCH_A;

			s->init_num=0;

			break;

		case SSL3_ST_CW_KEY_EXCH_A:

		case SSL3_ST_CW_KEY_EXCH_B:

			ret=dtls1_send_client_key_exchange(s);

			if (ret <= 0) goto end;

			l=s->s3->tmp.new_cipher->algorithms;

			/* EAY EAY EAY need to check for DH fix cert

			 * sent back */

			/* For TLS, cert_req is set to 2, so a cert chain

			 * of nothing is sent, but no verify packet is sent */

			if (s->s3->tmp.cert_req == 1)

				{

				s->state=SSL3_ST_CW_CERT_VRFY_A;

				}

			else

				{

				s->state=SSL3_ST_CW_CHANGE_A;

				s->s3->change_cipher_spec=0;

				}

			s->init_num=0;

			break;

		case SSL3_ST_CW_CERT_VRFY_A:

		case SSL3_ST_CW_CERT_VRFY_B:

			ret=dtls1_send_client_verify(s);

			if (ret <= 0) goto end;

			s->state=SSL3_ST_CW_CHANGE_A;

			s->init_num=0;

			s->s3->change_cipher_spec=0;

			break;

		case SSL3_ST_CW_CHANGE_A:

		case SSL3_ST_CW_CHANGE_B:

			ret=dtls1_send_change_cipher_spec(s,

				SSL3_ST_CW_CHANGE_A,SSL3_ST_CW_CHANGE_B);

			if (ret <= 0) goto end;

			s->state=SSL3_ST_CW_FINISHED_A;

			s->init_num=0;

			s->session->cipher=s->s3->tmp.new_cipher;

#ifdef OPENSSL_NO_COMP

			s->session->compress_meth=0;

#else

			if (s->s3->tmp.new_compression == NULL)

				s->session->compress_meth=0;

			else

				s->session->compress_meth=

					s->s3->tmp.new_compression->id;

#endif

			if (!s->method->ssl3_enc->setup_key_block(s))

				{

				ret= -1;

				goto end;

				}

			if (!s->method->ssl3_enc->change_cipher_state(s,

				SSL3_CHANGE_CIPHER_CLIENT_WRITE))

				{

				ret= -1;

				goto end;

				}

			dtls1_reset_seq_numbers(s, SSL3_CC_WRITE);

			break;

		case SSL3_ST_CW_FINISHED_A:

		case SSL3_ST_CW_FINISHED_B:

			ret=dtls1_send_finished(s,

				SSL3_ST_CW_FINISHED_A,SSL3_ST_CW_FINISHED_B,

				s->method->ssl3_enc->client_finished_label,

				s->method->ssl3_enc->client_finished_label_len);

			if (ret <= 0) goto end;

			s->state=SSL3_ST_CW_FLUSH;

			/* clear flags */

			s->s3->flags&= ~SSL3_FLAGS_POP_BUFFER;

			if (s->hit)

				{

				s->s3->tmp.next_state=SSL_ST_OK;

				if (s->s3->flags & SSL3_FLAGS_DELAY_CLIENT_FINISHED)

					{

					s->state=SSL_ST_OK;

					s->s3->flags|=SSL3_FLAGS_POP_BUFFER;

					s->s3->delay_buf_pop_ret=0;

					}

				}

			else

				{

				s->s3->tmp.next_state=SSL3_ST_CR_FINISHED_A;

				}

			s->init_num=0;

			/* mark client_random uninitialized */

			memset (s->s3->client_random,0,sizeof(s->s3->client_random));

			break;

		case SSL3_ST_CR_FINISHED_A:

		case SSL3_ST_CR_FINISHED_B:

			ret=ssl3_get_finished(s,SSL3_ST_CR_FINISHED_A,

				SSL3_ST_CR_FINISHED_B);

			if (ret <= 0) goto end;

			if (s->hit)

				s->state=SSL3_ST_CW_CHANGE_A;

			else

				s->state=SSL_ST_OK;

			s->init_num=0;

			break;

		case SSL3_ST_CW_FLUSH:

			/* number of bytes to be flushed */

			num1=BIO_ctrl(s->wbio,BIO_CTRL_INFO,0,NULL);

			if (num1 > 0)

				{

				s->rwstate=SSL_WRITING;

				num1=BIO_flush(s->wbio);

				if (num1 <= 0) { ret= -1; goto end; }

				s->rwstate=SSL_NOTHING;

				}

			s->state=s->s3->tmp.next_state;

			break;

		case SSL_ST_OK:

			/* clean a few things up */

			ssl3_cleanup_key_block(s);

#if 0

			if (s->init_buf != NULL)

				{

				BUF_MEM_free(s->init_buf);

				s->init_buf=NULL;

				}

#endif

			/* If we are not 'joining' the last two packets,

			 * remove the buffering now */

			if (!(s->s3->flags & SSL3_FLAGS_POP_BUFFER))

				ssl_free_wbio_buffer(s);

			/* else do it later in ssl3_write */

			s->init_num=0;

			s->new_session=0;

			ssl_update_cache(s,SSL_SESS_CACHE_CLIENT);

			if (s->hit) s->ctx->stats.sess_hit++;

			ret=1;

			/* s->server=0; */

			s->handshake_func=dtls1_connect;

			s->ctx->stats.sess_connect_good++;

			if (cb != NULL) cb(s,SSL_CB_HANDSHAKE_DONE,1);

			/* done with handshaking */

			s->d1->handshake_read_seq  = 0;

			goto end;

			/* break; */

		default:

			SSLerr(SSL_F_DTLS1_CONNECT,SSL_R_UNKNOWN_STATE);

			ret= -1;

			goto end;

			/* break; */

			}

		/* did we do anything */

		if (!s->s3->tmp.reuse_message && !skip)

			{

			if (s->debug)

				{

				if ((ret=BIO_flush(s->wbio)) <= 0)

					goto end;

				}

			if ((cb != NULL) && (s->state != state))

				{

				new_state=s->state;

				s->state=state;

				cb(s,SSL_CB_CONNECT_LOOP,1);

				s->state=new_state;

				}

			}

		skip=0;

		}

end:

	s->in_handshake--;

	if (buf != NULL)

		BUF_MEM_free(buf);

	if (cb != NULL)

		cb(s,SSL_CB_CONNECT_EXIT,ret);

	return(ret);

	}

int dtls1_client_hello(SSL *s)

	{

	unsigned char *buf;

	unsigned char *p,*d;

	unsigned int i,j;

	unsigned long Time,l;

	SSL_COMP *comp;

	buf=(unsigned char *)s->init_buf->data;

	if (s->state == SSL3_ST_CW_CLNT_HELLO_A)

		{

		if ((s->session == NULL) ||

			(s->session->ssl_version != s->version) ||

			(s->session->not_resumable))

			{

			if (!ssl_get_new_session(s,0))

				goto err;

			}

		/* else use the pre-loaded session */

		p=s->s3->client_random;

		/* if client_random is initialized, reuse it, we are

		 * required to use same upon reply to HelloVerify */

		for (i=0;p[i]=='\0' && i<sizeof(s->s3->client_random);i++) ;

		if (i==sizeof(s->s3->client_random))

			{

			Time=(unsigned long)time(NULL);	/* Time */

			l2n(Time,p);

			RAND_pseudo_bytes(p,SSL3_RANDOM_SIZE-4);

			}

		/* Do the message type and length last */

		d=p= &(buf[DTLS1_HM_HEADER_LENGTH]);

		*(p++)=s->version>>8;

		*(p++)=s->version&0xff;

		s->client_version=s->version;

		/* Random stuff */

		memcpy(p,s->s3->client_random,SSL3_RANDOM_SIZE);

		p+=SSL3_RANDOM_SIZE;

		/* Session ID */

		if (s->new_session)

			i=0;

		else

			i=s->session->session_id_length;

		*(p++)=i;

		if (i != 0)

			{

			if (i > sizeof s->session->session_id)

				{

				SSLerr(SSL_F_DTLS1_CLIENT_HELLO, ERR_R_INTERNAL_ERROR);

				goto err;

				}

			memcpy(p,s->session->session_id,i);

			p+=i;

			}

		/* cookie stuff */

		if ( s->d1->cookie_len > sizeof(s->d1->cookie))

			{

			SSLerr(SSL_F_DTLS1_CLIENT_HELLO, ERR_R_INTERNAL_ERROR);

			goto err;

			}

		*(p++) = s->d1->cookie_len;

		memcpy(p, s->d1->cookie, s->d1->cookie_len);

		p += s->d1->cookie_len;

		/* Ciphers supported */

		i=ssl_cipher_list_to_bytes(s,SSL_get_ciphers(s),&(p[2]),0);

		if (i == 0)

			{

			SSLerr(SSL_F_DTLS1_CLIENT_HELLO,SSL_R_NO_CIPHERS_AVAILABLE);

			goto err;

			}

		s2n(i,p);

		p+=i;

		/* COMPRESSION */

		if (s->ctx->comp_methods == NULL)

			j=0;

		else

			j=sk_SSL_COMP_num(s->ctx->comp_methods);

		*(p++)=1+j;

		for (i=0; i<j; i++)

			{

			comp=sk_SSL_COMP_value(s->ctx->comp_methods,i);

			*(p++)=comp->id;

			}

		*(p++)=0; /* Add the NULL method */

		l=(p-d);

		d=buf;

		d = dtls1_set_message_header(s, d, SSL3_MT_CLIENT_HELLO, l, 0, l);

		s->state=SSL3_ST_CW_CLNT_HELLO_B;

		/* number of bytes to write */

		s->init_num=p-buf;

		s->init_off=0;

		/* buffer the message to handle re-xmits */

		dtls1_buffer_message(s, 0);

		}

	/* SSL3_ST_CW_CLNT_HELLO_B */

	return(dtls1_do_write(s,SSL3_RT_HANDSHAKE));

err:

	return(-1);

	}

static int dtls1_get_hello_verify(SSL *s)

	{

	int n, al, ok = 0;

	unsigned char *data;

	unsigned int cookie_len;

	n=s->method->ssl_get_message(s,

		DTLS1_ST_CR_HELLO_VERIFY_REQUEST_A,

		DTLS1_ST_CR_HELLO_VERIFY_REQUEST_B,

		-1,

		s->max_cert_list,

		&ok);

	if (!ok) return((int)n);

	if (s->s3->tmp.message_type != DTLS1_MT_HELLO_VERIFY_REQUEST)

		{

		s->d1->send_cookie = 0;

		s->s3->tmp.reuse_message=1;

		return(1);

		}

	data = (unsigned char *)s->init_msg;

	if ((data[0] != (s->version>>8)) || (data[1] != (s->version&0xff)))

		{

		SSLerr(SSL_F_DTLS1_GET_HELLO_VERIFY,SSL_R_WRONG_SSL_VERSION);

		s->version=(s->version&0xff00)|data[1];

		al = SSL_AD_PROTOCOL_VERSION;

		goto f_err;

		}

	data+=2;

	cookie_len = *(data++);

	if ( cookie_len > sizeof(s->d1->cookie))

		{

		al=SSL_AD_ILLEGAL_PARAMETER;

		goto f_err;

		}

	memcpy(s->d1->cookie, data, cookie_len);

	s->d1->cookie_len = cookie_len;

	s->d1->send_cookie = 1;

	return 1;

f_err:

	ssl3_send_alert(s, SSL3_AL_FATAL, al);

	return -1;

	}

int dtls1_send_client_key_exchange(SSL *s)

	{

	unsigned char *p,*d;

	int n;

	unsigned long l;

#ifndef OPENSSL_NO_RSA

	unsigned char *q;

	EVP_PKEY *pkey=NULL;

#endif

#ifndef OPENSSL_NO_KRB5

        KSSL_ERR kssl_err;

#endif /* OPENSSL_NO_KRB5 */

	if (s->state == SSL3_ST_CW_KEY_EXCH_A)

		{

		d=(unsigned char *)s->init_buf->data;

		p= &(d[DTLS1_HM_HEADER_LENGTH]);

		l=s->s3->tmp.new_cipher->algorithms;

                /* Fool emacs indentation */

                if (0) {}

#ifndef OPENSSL_NO_RSA

		else if (l & SSL_kRSA)

			{

			RSA *rsa;

			unsigned char tmp_buf[SSL_MAX_MASTER_KEY_LENGTH];

			if (s->session->sess_cert->peer_rsa_tmp != NULL)

				rsa=s->session->sess_cert->peer_rsa_tmp;

			else

				{

				pkey=X509_get_pubkey(s->session->sess_cert->peer_pkeys[SSL_PKEY_RSA_ENC].x509);

				if ((pkey == NULL) ||

					(pkey->type != EVP_PKEY_RSA) ||

					(pkey->pkey.rsa == NULL))

					{

					SSLerr(SSL_F_DTLS1_SEND_CLIENT_KEY_EXCHANGE,ERR_R_INTERNAL_ERROR);

					goto err;

					}

				rsa=pkey->pkey.rsa;

				EVP_PKEY_free(pkey);

				}

			tmp_buf[0]=s->client_version>>8;

			tmp_buf[1]=s->client_version&0xff;

			if (RAND_bytes(&(tmp_buf[2]),sizeof tmp_buf-2) <= 0)

					goto err;

			s->session->master_key_length=sizeof tmp_buf;

			q=p;

			/* Fix buf for TLS and [incidentally] DTLS */

			if (s->version > SSL3_VERSION)

				p+=2;

			n=RSA_public_encrypt(sizeof tmp_buf,

				tmp_buf,p,rsa,RSA_PKCS1_PADDING);

#ifdef PKCS1_CHECK

			if (s->options & SSL_OP_PKCS1_CHECK_1) p[1]++;

			if (s->options & SSL_OP_PKCS1_CHECK_2) tmp_buf[0]=0x70;

#endif

			if (n <= 0)

				{

				SSLerr(SSL_F_DTLS1_SEND_CLIENT_KEY_EXCHANGE,SSL_R_BAD_RSA_ENCRYPT);

				goto err;

				}

			/* Fix buf for TLS and [incidentally] DTLS */

			if (s->version > SSL3_VERSION)

				{

				s2n(n,q);

				n+=2;

				}

			s->session->master_key_length=

				s->method->ssl3_enc->generate_master_secret(s,

					s->session->master_key,

					tmp_buf,sizeof tmp_buf);

			OPENSSL_cleanse(tmp_buf,sizeof tmp_buf);

			}

#endif

#ifndef OPENSSL_NO_KRB5

		else if (l & SSL_kKRB5)

                        {

                        krb5_error_code	krb5rc;

                        KSSL_CTX	*kssl_ctx = s->kssl_ctx;

                        /*  krb5_data	krb5_ap_req;  */

                        krb5_data	*enc_ticket;

                        krb5_data	authenticator, *authp = NULL;

			EVP_CIPHER_CTX	ciph_ctx;

			EVP_CIPHER	*enc = NULL;

			unsigned char	iv[EVP_MAX_IV_LENGTH];

			unsigned char	tmp_buf[SSL_MAX_MASTER_KEY_LENGTH];

			unsigned char	epms[SSL_MAX_MASTER_KEY_LENGTH 

						+ EVP_MAX_IV_LENGTH];

			int 		padl, outl = sizeof(epms);

			EVP_CIPHER_CTX_init(&ciph_ctx);

#ifdef KSSL_DEBUG

                        printf("ssl3_send_client_key_exchange(%lx & %lx)\n",

                                l, SSL_kKRB5);

#endif	/* KSSL_DEBUG */

			authp = NULL;

#ifdef KRB5SENDAUTH

			if (KRB5SENDAUTH)  authp = &authenticator;

#endif	/* KRB5SENDAUTH */

                        krb5rc = kssl_cget_tkt(kssl_ctx, &enc_ticket, authp,

				&kssl_err);

			enc = kssl_map_enc(kssl_ctx->enctype);

                        if (enc == NULL)

                            goto err;

#ifdef KSSL_DEBUG

                        {

                        printf("kssl_cget_tkt rtn %d\n", krb5rc);

                        if (krb5rc && kssl_err.text)

			  printf("kssl_cget_tkt kssl_err=%s\n", kssl_err.text);

                        }

#endif	/* KSSL_DEBUG */

                        if (krb5rc)

                                {

                                ssl3_send_alert(s,SSL3_AL_FATAL,

						SSL_AD_HANDSHAKE_FAILURE);

                                SSLerr(SSL_F_DTLS1_SEND_CLIENT_KEY_EXCHANGE,

						kssl_err.reason);

                                goto err;

                                }

			/*  20010406 VRS - Earlier versions used KRB5 AP_REQ

			**  in place of RFC 2712 KerberosWrapper, as in:

			**

                        **  Send ticket (copy to *p, set n = length)

                        **  n = krb5_ap_req.length;

                        **  memcpy(p, krb5_ap_req.data, krb5_ap_req.length);

                        **  if (krb5_ap_req.data)  

                        **    kssl_krb5_free_data_contents(NULL,&krb5_ap_req);

                        **

			**  Now using real RFC 2712 KerberosWrapper

			**  (Thanks to Simon Wilkinson <sxw@sxw.org.uk>)

			**  Note: 2712 "opaque" types are here replaced

			**  with a 2-byte length followed by the value.

			**  Example:

			**  KerberosWrapper= xx xx asn1ticket 0 0 xx xx encpms

			**  Where "xx xx" = length bytes.  Shown here with

			**  optional authenticator omitted.

			*/

			/*  KerberosWrapper.Ticket		*/

			s2n(enc_ticket->length,p);

			memcpy(p, enc_ticket->data, enc_ticket->length);

			p+= enc_ticket->length;

			n = enc_ticket->length + 2;

			/*  KerberosWrapper.Authenticator	*/

			if (authp  &&  authp->length)  

				{

				s2n(authp->length,p);

				memcpy(p, authp->data, authp->length);

				p+= authp->length;

				n+= authp->length + 2;

				free(authp->data);

				authp->data = NULL;

				authp->length = 0;

				}

			else

				{

				s2n(0,p);/*  null authenticator length	*/

				n+=2;

				}

			if (RAND_bytes(tmp_buf,sizeof tmp_buf) <= 0)

			    goto err;

			/*  20010420 VRS.  Tried it this way; failed.

			**	EVP_EncryptInit_ex(&ciph_ctx,enc, NULL,NULL);

			**	EVP_CIPHER_CTX_set_key_length(&ciph_ctx,

			**				kssl_ctx->length);

			**	EVP_EncryptInit_ex(&ciph_ctx,NULL, key,iv);

			*/

			memset(iv, 0, sizeof iv);  /* per RFC 1510 */

			EVP_EncryptInit_ex(&ciph_ctx,enc, NULL,

				kssl_ctx->key,iv);

			EVP_EncryptUpdate(&ciph_ctx,epms,&outl,tmp_buf,

				sizeof tmp_buf);

			EVP_EncryptFinal_ex(&ciph_ctx,&(epms[outl]),&padl);

			outl += padl;

			if (outl > sizeof epms)

				{

				SSLerr(SSL_F_DTLS1_SEND_CLIENT_KEY_EXCHANGE, ERR_R_INTERNAL_ERROR);

				goto err;

				}

			EVP_CIPHER_CTX_cleanup(&ciph_ctx);

			/*  KerberosWrapper.EncryptedPreMasterSecret	*/

			s2n(outl,p);

			memcpy(p, epms, outl);

			p+=outl;

			n+=outl + 2;

                        s->session->master_key_length=

                                s->method->ssl3_enc->generate_master_secret(s,

					s->session->master_key,

					tmp_buf, sizeof tmp_buf);

			OPENSSL_cleanse(tmp_buf, sizeof tmp_buf);

			OPENSSL_cleanse(epms, outl);

                        }

#endif

#ifndef OPENSSL_NO_DH

		else if (l & (SSL_kEDH|SSL_kDHr|SSL_kDHd))

			{

			DH *dh_srvr,*dh_clnt;

			if (s->session->sess_cert->peer_dh_tmp != NULL)

				dh_srvr=s->session->sess_cert->peer_dh_tmp;

			else

				{

				/* we get them from the cert */

				ssl3_send_alert(s,SSL3_AL_FATAL,SSL_AD_HANDSHAKE_FAILURE);

				SSLerr(SSL_F_DTLS1_SEND_CLIENT_KEY_EXCHANGE,SSL_R_UNABLE_TO_FIND_DH_PARAMETERS);

				goto err;

				}

			/* generate a new random key */

			if ((dh_clnt=DHparams_dup(dh_srvr)) == NULL)

				{

				SSLerr(SSL_F_DTLS1_SEND_CLIENT_KEY_EXCHANGE,ERR_R_DH_LIB);

				goto err;

				}

			if (!DH_generate_key(dh_clnt))

				{

				SSLerr(SSL_F_DTLS1_SEND_CLIENT_KEY_EXCHANGE,ERR_R_DH_LIB);

				goto err;

				}

			/* use the 'p' output buffer for the DH key, but

			 * make sure to clear it out afterwards */

			n=DH_compute_key(p,dh_srvr->pub_key,dh_clnt);

			if (n <= 0)

				{

				SSLerr(SSL_F_DTLS1_SEND_CLIENT_KEY_EXCHANGE,ERR_R_DH_LIB);

				goto err;

				}

			/* generate master key from the result */

			s->session->master_key_length=

				s->method->ssl3_enc->generate_master_secret(s,

					s->session->master_key,p,n);

			/* clean up */

			memset(p,0,n);

			/* send off the data */

			n=BN_num_bytes(dh_clnt->pub_key);

			s2n(n,p);

			BN_bn2bin(dh_clnt->pub_key,p);

			n+=2;

			DH_free(dh_clnt);

			/* perhaps clean things up a bit EAY EAY EAY EAY*/

			}

#endif

		else

			{

			ssl3_send_alert(s,SSL3_AL_FATAL,SSL_AD_HANDSHAKE_FAILURE);

			SSLerr(SSL_F_DTLS1_SEND_CLIENT_KEY_EXCHANGE,ERR_R_INTERNAL_ERROR);

			goto err;

			}

		d = dtls1_set_message_header(s, d,

		SSL3_MT_CLIENT_KEY_EXCHANGE, n, 0, n);

		/*

		 *(d++)=SSL3_MT_CLIENT_KEY_EXCHANGE;

		 l2n3(n,d);

		 l2n(s->d1->handshake_write_seq,d);

		 s->d1->handshake_write_seq++;

		*/