Commit message: Fix SRP ciphersuite DoS vulnerability.

If a client attempted to use an SRP ciphersuite and it had not been
set up correctly it would crash with a null pointer read. A malicious
server could exploit this in a DoS attack.

Thanks to Joonas Kuorilehto and Riku Hietamäki from Codenomicon
for reporting this issue.

CVE-2014-5139
Reviewed-by: Tim Hudson <tjh@openssl.org>
CVE: CVE-2014-5139
Vulnerability description: The ssl_set_client_disabled function in t1_lib.c in OpenSSL 1.0.1 before 1.0.1i allows remote SSL servers to cause a denial of service (NULL pointer dereference and client application crash) via a ServerHello message that includes an SRP ciphersuite without the required negotiation of that ciphersuite with the client.

Project: openssl

int ssl3_check_cert_and_algorithm(SSL *s)
	{
	int i,idx;
	long alg_k,alg_a;
	EVP_PKEY *pkey=NULL;
	SESS_CERT *sc;
#ifndef OPENSSL_NO_RSA
	RSA *rsa;
#endif
#ifndef OPENSSL_NO_DH
	DH *dh;
#endif

	alg_k=s->s3->tmp.new_cipher->algorithm_mkey;
	alg_a=s->s3->tmp.new_cipher->algorithm_auth;

	/* we don't have a certificate */
	if ((alg_a & (SSL_aDH|SSL_aNULL|SSL_aKRB5)) || (alg_k & SSL_kPSK))
		return(1);

	sc=s->session->sess_cert;
	if (sc == NULL)
		{
		SSLerr(SSL_F_SSL3_CHECK_CERT_AND_ALGORITHM,ERR_R_INTERNAL_ERROR);
		goto err;
		}

#ifndef OPENSSL_NO_RSA
	rsa=s->session->sess_cert->peer_rsa_tmp;
#endif
#ifndef OPENSSL_NO_DH
	dh=s->session->sess_cert->peer_dh_tmp;
#endif

	/* This is the passed certificate */

	idx=sc->peer_cert_type;
#ifndef OPENSSL_NO_ECDH
	if (idx == SSL_PKEY_ECC)
		{
		if (ssl_check_srvr_ecc_cert_and_alg(sc->peer_pkeys[idx].x509,
		    						s) == 0) 
			{ /* check failed */
			SSLerr(SSL_F_SSL3_CHECK_CERT_AND_ALGORITHM,SSL_R_BAD_ECC_CERT);
			goto f_err;
			}
		else 
			{
			return 1;
			}
		}
#endif
	pkey=X509_get_pubkey(sc->peer_pkeys[idx].x509);
	i=X509_certificate_type(sc->peer_pkeys[idx].x509,pkey);
	EVP_PKEY_free(pkey);

	
	/* Check that we have a certificate if we require one */
	if ((alg_a & SSL_aRSA) && !has_bits(i,EVP_PK_RSA|EVP_PKT_SIGN))
		{
		SSLerr(SSL_F_SSL3_CHECK_CERT_AND_ALGORITHM,SSL_R_MISSING_RSA_SIGNING_CERT);
		goto f_err;
		}
#ifndef OPENSSL_NO_DSA
	else if ((alg_a & SSL_aDSS) && !has_bits(i,EVP_PK_DSA|EVP_PKT_SIGN))
		{
		SSLerr(SSL_F_SSL3_CHECK_CERT_AND_ALGORITHM,SSL_R_MISSING_DSA_SIGNING_CERT);
		goto f_err;
		}
#endif
#ifndef OPENSSL_NO_RSA
	if ((alg_k & SSL_kRSA) &&
		!(has_bits(i,EVP_PK_RSA|EVP_PKT_ENC) || (rsa != NULL)))
		{
		SSLerr(SSL_F_SSL3_CHECK_CERT_AND_ALGORITHM,SSL_R_MISSING_RSA_ENCRYPTING_CERT);
		goto f_err;
		}
#endif
#ifndef OPENSSL_NO_DH
	if ((alg_k & SSL_kEDH) &&
		!(has_bits(i,EVP_PK_DH|EVP_PKT_EXCH) || (dh != NULL)))
		{
		SSLerr(SSL_F_SSL3_CHECK_CERT_AND_ALGORITHM,SSL_R_MISSING_DH_KEY);
		goto f_err;
		}
	else if ((alg_k & SSL_kDHr) && !has_bits(i,EVP_PK_DH|EVP_PKS_RSA))
		{
		SSLerr(SSL_F_SSL3_CHECK_CERT_AND_ALGORITHM,SSL_R_MISSING_DH_RSA_CERT);
		goto f_err;
		}
#ifndef OPENSSL_NO_DSA
	else if ((alg_k & SSL_kDHd) && !has_bits(i,EVP_PK_DH|EVP_PKS_DSA))
		{
		SSLerr(SSL_F_SSL3_CHECK_CERT_AND_ALGORITHM,SSL_R_MISSING_DH_DSA_CERT);
		goto f_err;
		}
#endif
#endif

	if (SSL_C_IS_EXPORT(s->s3->tmp.new_cipher) && !has_bits(i,EVP_PKT_EXP))
		{
#ifndef OPENSSL_NO_RSA
		if (alg_k & SSL_kRSA)
			{
			if (rsa == NULL
			    || RSA_size(rsa)*8 > SSL_C_EXPORT_PKEYLENGTH(s->s3->tmp.new_cipher))
				{
				SSLerr(SSL_F_SSL3_CHECK_CERT_AND_ALGORITHM,SSL_R_MISSING_EXPORT_TMP_RSA_KEY);
				goto f_err;
				}
			}
		else
#endif
#ifndef OPENSSL_NO_DH
			if (alg_k & (SSL_kEDH|SSL_kDHr|SSL_kDHd))
			    {
			    if (dh == NULL
				|| DH_size(dh)*8 > SSL_C_EXPORT_PKEYLENGTH(s->s3->tmp.new_cipher))
				{
				SSLerr(SSL_F_SSL3_CHECK_CERT_AND_ALGORITHM,SSL_R_MISSING_EXPORT_TMP_DH_KEY);
				goto f_err;
				}
			}
		else
#endif
			{
			SSLerr(SSL_F_SSL3_CHECK_CERT_AND_ALGORITHM,SSL_R_UNKNOWN_KEY_EXCHANGE_TYPE);
			goto f_err;
			}
		}
	return(1);
f_err:
	ssl3_send_alert(s,SSL3_AL_FATAL,SSL_AD_HANDSHAKE_FAILURE);
err:
	return(0);
	}

Project: openssl

int ssl3_check_finished(SSL *s)
	{
	int ok;
	long n;
	/* If we have no ticket it cannot be a resumed session. */
	if (!s->session->tlsext_tick)
		return 1;
	/* this function is called when we really expect a Certificate
	 * message, so permit appropriate message length */
	n=s->method->ssl_get_message(s,
		SSL3_ST_CR_CERT_A,
		SSL3_ST_CR_CERT_B,
		-1,
		s->max_cert_list,
		&ok);
	if (!ok) return((int)n);
	s->s3->tmp.reuse_message = 1;
	if ((s->s3->tmp.message_type == SSL3_MT_FINISHED)
		|| (s->s3->tmp.message_type == SSL3_MT_NEWSESSION_TICKET))
		return 2;

	return 1;
	}

Project: openssl

int ssl3_client_hello(SSL *s)
	{
	unsigned char *buf;
	unsigned char *p,*d;
	int i;
	unsigned long l;
#ifndef OPENSSL_NO_COMP
	int j;
	SSL_COMP *comp;
#endif

	buf=(unsigned char *)s->init_buf->data;
	if (s->state == SSL3_ST_CW_CLNT_HELLO_A)
		{
		SSL_SESSION *sess = s->session;
		if ((sess == NULL) ||
			(sess->ssl_version != s->version) ||
#ifdef OPENSSL_NO_TLSEXT
			!sess->session_id_length ||
#else
			(!sess->session_id_length && !sess->tlsext_tick) ||
#endif
			(sess->not_resumable))
			{
			if (!ssl_get_new_session(s,0))
				goto err;
			}
		/* else use the pre-loaded session */

		p=s->s3->client_random;

		if (ssl_fill_hello_random(s, 0, p, SSL3_RANDOM_SIZE) <= 0)
			goto err;

		/* Do the message type and length last */
		d=p= &(buf[4]);

		/* version indicates the negotiated version: for example from
		 * an SSLv2/v3 compatible client hello). The client_version
		 * field is the maximum version we permit and it is also
		 * used in RSA encrypted premaster secrets. Some servers can
		 * choke if we initially report a higher version then
		 * renegotiate to a lower one in the premaster secret. This
		 * didn't happen with TLS 1.0 as most servers supported it
		 * but it can with TLS 1.1 or later if the server only supports
		 * 1.0.
		 *
		 * Possible scenario with previous logic:
		 * 	1. Client hello indicates TLS 1.2
		 * 	2. Server hello says TLS 1.0
		 *	3. RSA encrypted premaster secret uses 1.2.
		 * 	4. Handhaked proceeds using TLS 1.0.
		 *	5. Server sends hello request to renegotiate.
		 *	6. Client hello indicates TLS v1.0 as we now
		 *	   know that is maximum server supports.
		 *	7. Server chokes on RSA encrypted premaster secret
		 *	   containing version 1.0.
		 *
		 * For interoperability it should be OK to always use the
		 * maximum version we support in client hello and then rely
		 * on the checking of version to ensure the servers isn't
		 * being inconsistent: for example initially negotiating with
		 * TLS 1.0 and renegotiating with TLS 1.2. We do this by using
		 * client_version in client hello and not resetting it to
		 * the negotiated version.
		 */
#if 0
		*(p++)=s->version>>8;
		*(p++)=s->version&0xff;
		s->client_version=s->version;
#else
		*(p++)=s->client_version>>8;
		*(p++)=s->client_version&0xff;
#endif

		/* 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 > (int)sizeof(s->session->session_id))
				{
				SSLerr(SSL_F_SSL3_CLIENT_HELLO, ERR_R_INTERNAL_ERROR);
				goto err;
				}
			memcpy(p,s->session->session_id,i);
			p+=i;
			}
		
		/* Ciphers supported */
		i=ssl_cipher_list_to_bytes(s,SSL_get_ciphers(s),&(p[2]),0);
		if (i == 0)
			{
			SSLerr(SSL_F_SSL3_CLIENT_HELLO,SSL_R_NO_CIPHERS_AVAILABLE);
			goto err;
			}
#ifdef OPENSSL_MAX_TLS1_2_CIPHER_LENGTH
			/* Some servers hang if client hello > 256 bytes
			 * as hack workaround chop number of supported ciphers
			 * to keep it well below this if we use TLS v1.2
			 */
			if (TLS1_get_version(s) >= TLS1_2_VERSION
				&& i > OPENSSL_MAX_TLS1_2_CIPHER_LENGTH)
				i = OPENSSL_MAX_TLS1_2_CIPHER_LENGTH & ~1;
#endif
		s2n(i,p);
		p+=i;

		/* COMPRESSION */
#ifdef OPENSSL_NO_COMP
		*(p++)=1;
#else

		if ((s->options & SSL_OP_NO_COMPRESSION)
					|| !s->ctx->comp_methods)
			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;
			}
#endif
		*(p++)=0; /* Add the NULL method */

#ifndef OPENSSL_NO_TLSEXT
		/* TLS extensions*/
		if (ssl_prepare_clienthello_tlsext(s) <= 0)
			{
			SSLerr(SSL_F_SSL3_CLIENT_HELLO,SSL_R_CLIENTHELLO_TLSEXT);
			goto err;
			}
		if ((p = ssl_add_clienthello_tlsext(s, p, buf+SSL3_RT_MAX_PLAIN_LENGTH)) == NULL)
			{
			SSLerr(SSL_F_SSL3_CLIENT_HELLO,ERR_R_INTERNAL_ERROR);
			goto err;
			}
#endif
		
		l=(p-d);
		d=buf;
		*(d++)=SSL3_MT_CLIENT_HELLO;
		l2n3(l,d);

		s->state=SSL3_ST_CW_CLNT_HELLO_B;
		/* number of bytes to write */
		s->init_num=p-buf;
		s->init_off=0;
		}

	/* SSL3_ST_CW_CLNT_HELLO_B */
	return(ssl3_do_write(s,SSL3_RT_HANDSHAKE));
err:
	return(-1);
	}

Project: openssl

int ssl3_connect(SSL *s)
	{
	BUF_MEM *buf=NULL;
	unsigned long Time=(unsigned long)time(NULL);
	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); 

#ifndef OPENSSL_NO_HEARTBEATS
	/* If we're awaiting a HeartbeatResponse, pretend we
	 * already got and don't await it anymore, because
	 * Heartbeats don't make sense during handshakes anyway.
	 */
	if (s->tlsext_hb_pending)
		{
		s->tlsext_hb_pending = 0;
		s->tlsext_hb_seq++;
		}
#endif

	for (;;)
		{
		state=s->state;

		switch(s->state)
			{
		case SSL_ST_RENEGOTIATE:
			s->renegotiate=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 ) != 0x0300)
				{
				SSLerr(SSL_F_SSL3_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 */

			ssl3_init_finished_mac(s);

			s->state=SSL3_ST_CW_CLNT_HELLO_A;
			s->ctx->stats.sess_connect++;
			s->init_num=0;
			break;

		case SSL3_ST_CW_CLNT_HELLO_A:
		case SSL3_ST_CW_CLNT_HELLO_B:

			s->shutdown=0;
			ret=ssl3_client_hello(s);
			if (ret <= 0) goto end;
			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;

			if (s->hit)
				{
				s->state=SSL3_ST_CR_FINISHED_A;
#ifndef OPENSSL_NO_TLSEXT
				if (s->tlsext_ticket_expected)
					{
					/* receive renewed session ticket */
					s->state=SSL3_ST_CR_SESSION_TICKET_A;
					}
#endif
				}
			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:
#ifndef OPENSSL_NO_TLSEXT
			ret=ssl3_check_finished(s);
			if (ret <= 0) goto end;
			if (ret == 2)
				{
				s->hit = 1;
				if (s->tlsext_ticket_expected)
					s->state=SSL3_ST_CR_SESSION_TICKET_A;
				else
					s->state=SSL3_ST_CR_FINISHED_A;
				s->init_num=0;
				break;
				}
#endif
			/* Check if it is anon DH/ECDH */
			/* or PSK */
			if (!(s->s3->tmp.new_cipher->algorithm_auth & SSL_aNULL) &&
			    !(s->s3->tmp.new_cipher->algorithm_mkey & SSL_kPSK))
				{
				ret=ssl3_get_server_certificate(s);
				if (ret <= 0) goto end;
#ifndef OPENSSL_NO_TLSEXT
				if (s->tlsext_status_expected)
					s->state=SSL3_ST_CR_CERT_STATUS_A;
				else
					s->state=SSL3_ST_CR_KEY_EXCH_A;
				}
			else
				{
				skip = 1;
				s->state=SSL3_ST_CR_KEY_EXCH_A;
				}
#else
				}
			else
				skip=1;

			s->state=SSL3_ST_CR_KEY_EXCH_A;
#endif
			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;
#ifndef OPENSSL_NO_SRP
			if (s->s3->tmp.new_cipher->algorithm_mkey & SSL_kSRP)
				{
				if ((ret = SRP_Calc_A_param(s))<=0)
					{
					SSLerr(SSL_F_SSL3_CONNECT,SSL_R_SRP_A_CALC);
					ssl3_send_alert(s,SSL3_AL_FATAL,SSL_AD_INTERNAL_ERROR);
					goto end;
					}
				}
#endif
			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=ssl3_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=ssl3_send_client_key_exchange(s);
			if (ret <= 0) goto end;
			/* 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 */
			/* XXX: For now, we do not support client 
			 * authentication in ECDH cipher suites with
			 * ECDH (rather than ECDSA) certificates.
			 * We need to skip the certificate verify 
			 * message when client's ECDH public key is sent 
			 * inside the client certificate.
			 */
			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;
				}
			if (s->s3->flags & TLS1_FLAGS_SKIP_CERT_VERIFY)
				{
				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=ssl3_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=ssl3_send_change_cipher_spec(s,
				SSL3_ST_CW_CHANGE_A,SSL3_ST_CW_CHANGE_B);
			if (ret <= 0) goto end;

#if defined(OPENSSL_NO_TLSEXT) || defined(OPENSSL_NO_NEXTPROTONEG)
			s->state=SSL3_ST_CW_FINISHED_A;
#else
			if (s->s3->next_proto_neg_seen)
				s->state=SSL3_ST_CW_NEXT_PROTO_A;
			else
				s->state=SSL3_ST_CW_FINISHED_A;
#endif
			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;
				}

			break;

#if !defined(OPENSSL_NO_TLSEXT) && !defined(OPENSSL_NO_NEXTPROTONEG)
		case SSL3_ST_CW_NEXT_PROTO_A:
		case SSL3_ST_CW_NEXT_PROTO_B:
			ret=ssl3_send_next_proto(s);
			if (ret <= 0) goto end;
			s->state=SSL3_ST_CW_FINISHED_A;
			break;
#endif

		case SSL3_ST_CW_FINISHED_A:
		case SSL3_ST_CW_FINISHED_B:
			ret=ssl3_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->s3->flags |= SSL3_FLAGS_CCS_OK;
			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
				{
#ifndef OPENSSL_NO_TLSEXT
				/* Allow NewSessionTicket if ticket expected */
				if (s->tlsext_ticket_expected)
					s->s3->tmp.next_state=SSL3_ST_CR_SESSION_TICKET_A;
				else
#endif
				
				s->s3->tmp.next_state=SSL3_ST_CR_FINISHED_A;
				}
			s->init_num=0;
			break;

#ifndef OPENSSL_NO_TLSEXT
		case SSL3_ST_CR_SESSION_TICKET_A:
		case SSL3_ST_CR_SESSION_TICKET_B:
			ret=ssl3_get_new_session_ticket(s);
			if (ret <= 0) goto end;
			s->state=SSL3_ST_CR_FINISHED_A;
			s->init_num=0;
		break;

		case SSL3_ST_CR_CERT_STATUS_A:
		case SSL3_ST_CR_CERT_STATUS_B:
			ret=ssl3_get_cert_status(s);
			if (ret <= 0) goto end;
			s->state=SSL3_ST_CR_KEY_EXCH_A;
			s->init_num=0;
		break;
#endif

		case SSL3_ST_CR_FINISHED_A:
		case SSL3_ST_CR_FINISHED_B:

			s->s3->flags |= SSL3_FLAGS_CCS_OK;
			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:
			s->rwstate=SSL_WRITING;
			if (BIO_flush(s->wbio) <= 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 (s->init_buf != NULL)
				{
				BUF_MEM_free(s->init_buf);
				s->init_buf=NULL;
				}

			/* 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->renegotiate=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=ssl3_connect;
			s->ctx->stats.sess_connect_good++;

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

			goto end;
			/* break; */
			
		default:
			SSLerr(SSL_F_SSL3_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;
		}

Project: openssl

int ssl3_get_certificate_request(SSL *s)
	{
	int ok,ret=0;
	unsigned long n,nc,l;
	unsigned int llen, ctype_num,i;
	X509_NAME *xn=NULL;
	const unsigned char *p,*q;
	unsigned char *d;
	STACK_OF(X509_NAME) *ca_sk=NULL;

	n=s->method->ssl_get_message(s,
		SSL3_ST_CR_CERT_REQ_A,
		SSL3_ST_CR_CERT_REQ_B,
		-1,
		s->max_cert_list,
		&ok);

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

	s->s3->tmp.cert_req=0;

	if (s->s3->tmp.message_type == SSL3_MT_SERVER_DONE)
		{
		s->s3->tmp.reuse_message=1;
		/* If we get here we don't need any cached handshake records
		 * as we wont be doing client auth.
		 */
		if (s->s3->handshake_buffer)
			{
			if (!ssl3_digest_cached_records(s))
				goto err;
			}
		return(1);
		}

	if (s->s3->tmp.message_type != SSL3_MT_CERTIFICATE_REQUEST)
		{
		ssl3_send_alert(s,SSL3_AL_FATAL,SSL_AD_UNEXPECTED_MESSAGE);
		SSLerr(SSL_F_SSL3_GET_CERTIFICATE_REQUEST,SSL_R_WRONG_MESSAGE_TYPE);
		goto err;
		}

	/* TLS does not like anon-DH with client cert */
	if (s->version > SSL3_VERSION)
		{
		if (s->s3->tmp.new_cipher->algorithm_auth & SSL_aNULL)
			{
			ssl3_send_alert(s,SSL3_AL_FATAL,SSL_AD_UNEXPECTED_MESSAGE);
			SSLerr(SSL_F_SSL3_GET_CERTIFICATE_REQUEST,SSL_R_TLS_CLIENT_CERT_REQ_WITH_ANON_CIPHER);
			goto err;
			}
		}

	p=d=(unsigned char *)s->init_msg;

	if ((ca_sk=sk_X509_NAME_new(ca_dn_cmp)) == NULL)
		{
		SSLerr(SSL_F_SSL3_GET_CERTIFICATE_REQUEST,ERR_R_MALLOC_FAILURE);
		goto err;
		}

	/* get the certificate types */
	ctype_num= *(p++);
	if (ctype_num > SSL3_CT_NUMBER)
		ctype_num=SSL3_CT_NUMBER;
	for (i=0; i<ctype_num; i++)
		s->s3->tmp.ctype[i]= p[i];
	p+=ctype_num;
	if (TLS1_get_version(s) >= TLS1_2_VERSION)
		{
		n2s(p, llen);
		/* Check we have enough room for signature algorithms and
		 * following length value.
		 */
		if ((unsigned long)(p - d + llen + 2) > n)
			{
			ssl3_send_alert(s,SSL3_AL_FATAL,SSL_AD_DECODE_ERROR);
			SSLerr(SSL_F_SSL3_GET_CERTIFICATE_REQUEST,SSL_R_DATA_LENGTH_TOO_LONG);
			goto err;
			}
		if ((llen & 1) || !tls1_process_sigalgs(s, p, llen))
			{
			ssl3_send_alert(s,SSL3_AL_FATAL,SSL_AD_DECODE_ERROR);
			SSLerr(SSL_F_SSL3_GET_CERTIFICATE_REQUEST,SSL_R_SIGNATURE_ALGORITHMS_ERROR);
			goto err;
			}
		p += llen;
		}

	/* get the CA RDNs */
	n2s(p,llen);
#if 0
{
FILE *out;
out=fopen("/tmp/vsign.der","w");
fwrite(p,1,llen,out);
fclose(out);
}
#endif

	if ((unsigned long)(p - d + llen) != n)
		{
		ssl3_send_alert(s,SSL3_AL_FATAL,SSL_AD_DECODE_ERROR);
		SSLerr(SSL_F_SSL3_GET_CERTIFICATE_REQUEST,SSL_R_LENGTH_MISMATCH);
		goto err;
		}

	for (nc=0; nc<llen; )
		{
		n2s(p,l);
		if ((l+nc+2) > llen)
			{
			if ((s->options & SSL_OP_NETSCAPE_CA_DN_BUG))
				goto cont; /* netscape bugs */
			ssl3_send_alert(s,SSL3_AL_FATAL,SSL_AD_DECODE_ERROR);
			SSLerr(SSL_F_SSL3_GET_CERTIFICATE_REQUEST,SSL_R_CA_DN_TOO_LONG);
			goto err;
			}

		q=p;

		if ((xn=d2i_X509_NAME(NULL,&q,l)) == NULL)
			{
			/* If netscape tolerance is on, ignore errors */
			if (s->options & SSL_OP_NETSCAPE_CA_DN_BUG)
				goto cont;
			else
				{
				ssl3_send_alert(s,SSL3_AL_FATAL,SSL_AD_DECODE_ERROR);
				SSLerr(SSL_F_SSL3_GET_CERTIFICATE_REQUEST,ERR_R_ASN1_LIB);
				goto err;
				}
			}

		if (q != (p+l))
			{
			ssl3_send_alert(s,SSL3_AL_FATAL,SSL_AD_DECODE_ERROR);
			SSLerr(SSL_F_SSL3_GET_CERTIFICATE_REQUEST,SSL_R_CA_DN_LENGTH_MISMATCH);
			goto err;
			}
		if (!sk_X509_NAME_push(ca_sk,xn))
			{
			SSLerr(SSL_F_SSL3_GET_CERTIFICATE_REQUEST,ERR_R_MALLOC_FAILURE);
			goto err;
			}

		p+=l;
		nc+=l+2;
		}

	if (0)
		{
cont:
		ERR_clear_error();
		}

	/* we should setup a certificate to return.... */
	s->s3->tmp.cert_req=1;
	s->s3->tmp.ctype_num=ctype_num;
	if (s->s3->tmp.ca_names != NULL)
		sk_X509_NAME_pop_free(s->s3->tmp.ca_names,X509_NAME_free);
	s->s3->tmp.ca_names=ca_sk;
	ca_sk=NULL;

	ret=1;
err:
	if (ca_sk != NULL) sk_X509_NAME_pop_free(ca_sk,X509_NAME_free);
	return(ret);
	}

Project: openssl

int ssl3_get_key_exchange(SSL *s)
	{
#ifndef OPENSSL_NO_RSA
	unsigned char *q,md_buf[EVP_MAX_MD_SIZE*2];
#endif
	EVP_MD_CTX md_ctx;
	unsigned char *param,*p;
	int al,i,j,param_len,ok;
	long n,alg_k,alg_a;
	EVP_PKEY *pkey=NULL;
	const EVP_MD *md = NULL;
#ifndef OPENSSL_NO_RSA
	RSA *rsa=NULL;
#endif
#ifndef OPENSSL_NO_DH
	DH *dh=NULL;
#endif
#ifndef OPENSSL_NO_ECDH
	EC_KEY *ecdh = NULL;
	BN_CTX *bn_ctx = NULL;
	EC_POINT *srvr_ecpoint = NULL;
	int curve_nid = 0;
	int encoded_pt_len = 0;
#endif

	/* use same message size as in ssl3_get_certificate_request()
	 * as ServerKeyExchange message may be skipped */
	n=s->method->ssl_get_message(s,
		SSL3_ST_CR_KEY_EXCH_A,
		SSL3_ST_CR_KEY_EXCH_B,
		-1,
		s->max_cert_list,
		&ok);
	if (!ok) return((int)n);

	if (s->s3->tmp.message_type != SSL3_MT_SERVER_KEY_EXCHANGE)
		{
#ifndef OPENSSL_NO_PSK
		/* In plain PSK ciphersuite, ServerKeyExchange can be
		   omitted if no identity hint is sent. Set
		   session->sess_cert anyway to avoid problems
		   later.*/
		if (s->s3->tmp.new_cipher->algorithm_mkey & SSL_kPSK)
			{
			s->session->sess_cert=ssl_sess_cert_new();
			if (s->ctx->psk_identity_hint)
				OPENSSL_free(s->ctx->psk_identity_hint);
			s->ctx->psk_identity_hint = NULL;
			}
#endif
		s->s3->tmp.reuse_message=1;
		return(1);
		}

	param=p=(unsigned char *)s->init_msg;
	if (s->session->sess_cert != NULL)
		{
#ifndef OPENSSL_NO_RSA
		if (s->session->sess_cert->peer_rsa_tmp != NULL)
			{
			RSA_free(s->session->sess_cert->peer_rsa_tmp);
			s->session->sess_cert->peer_rsa_tmp=NULL;
			}
#endif
#ifndef OPENSSL_NO_DH
		if (s->session->sess_cert->peer_dh_tmp)
			{
			DH_free(s->session->sess_cert->peer_dh_tmp);
			s->session->sess_cert->peer_dh_tmp=NULL;
			}
#endif
#ifndef OPENSSL_NO_ECDH
		if (s->session->sess_cert->peer_ecdh_tmp)
			{
			EC_KEY_free(s->session->sess_cert->peer_ecdh_tmp);
			s->session->sess_cert->peer_ecdh_tmp=NULL;
			}
#endif
		}
	else
		{
		s->session->sess_cert=ssl_sess_cert_new();
		}

	param_len=0;
	alg_k=s->s3->tmp.new_cipher->algorithm_mkey;
	alg_a=s->s3->tmp.new_cipher->algorithm_auth;
	EVP_MD_CTX_init(&md_ctx);

#ifndef OPENSSL_NO_PSK
	if (alg_k & SSL_kPSK)
		{
		char tmp_id_hint[PSK_MAX_IDENTITY_LEN+1];

		al=SSL_AD_HANDSHAKE_FAILURE;
		n2s(p,i);
		param_len=i+2;
		/* Store PSK identity hint for later use, hint is used
		 * in ssl3_send_client_key_exchange.  Assume that the
		 * maximum length of a PSK identity hint can be as
		 * long as the maximum length of a PSK identity. */
		if (i > PSK_MAX_IDENTITY_LEN)
			{
			SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,
				SSL_R_DATA_LENGTH_TOO_LONG);
			goto f_err;
			}
		if (param_len > n)
			{
			al=SSL_AD_DECODE_ERROR;
			SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,
				SSL_R_BAD_PSK_IDENTITY_HINT_LENGTH);
			goto f_err;
			}
		/* If received PSK identity hint contains NULL
		 * characters, the hint is truncated from the first
		 * NULL. p may not be ending with NULL, so create a
		 * NULL-terminated string. */
		memcpy(tmp_id_hint, p, i);
		memset(tmp_id_hint+i, 0, PSK_MAX_IDENTITY_LEN+1-i);
		if (s->ctx->psk_identity_hint != NULL)
			OPENSSL_free(s->ctx->psk_identity_hint);
		s->ctx->psk_identity_hint = BUF_strdup(tmp_id_hint);
		if (s->ctx->psk_identity_hint == NULL)
			{
			SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE, ERR_R_MALLOC_FAILURE);
			goto f_err;
			}	   

		p+=i;
		n-=param_len;
		}
	else
#endif /* !OPENSSL_NO_PSK */
#ifndef OPENSSL_NO_SRP
	if (alg_k & SSL_kSRP)
		{
		n2s(p,i);
		param_len=i+2;
		if (param_len > n)
			{
			al=SSL_AD_DECODE_ERROR;
			SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,SSL_R_BAD_SRP_N_LENGTH);
			goto f_err;
			}
		if (!(s->srp_ctx.N=BN_bin2bn(p,i,NULL)))
			{
			SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,ERR_R_BN_LIB);
			goto err;
			}
		p+=i;

		n2s(p,i);
		param_len+=i+2;
		if (param_len > n)
			{
			al=SSL_AD_DECODE_ERROR;
			SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,SSL_R_BAD_SRP_G_LENGTH);
			goto f_err;
			}
		if (!(s->srp_ctx.g=BN_bin2bn(p,i,NULL)))
			{
			SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,ERR_R_BN_LIB);
			goto err;
			}
		p+=i;

		i = (unsigned int)(p[0]);
		p++;
		param_len+=i+1;
		if (param_len > n)
			{
			al=SSL_AD_DECODE_ERROR;
			SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,SSL_R_BAD_SRP_S_LENGTH);
			goto f_err;
			}
		if (!(s->srp_ctx.s=BN_bin2bn(p,i,NULL)))
			{
			SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,ERR_R_BN_LIB);
			goto err;
			}
		p+=i;

		n2s(p,i);
		param_len+=i+2;
		if (param_len > n)
			{
			al=SSL_AD_DECODE_ERROR;
			SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,SSL_R_BAD_SRP_B_LENGTH);
			goto f_err;
			}
		if (!(s->srp_ctx.B=BN_bin2bn(p,i,NULL)))
			{
			SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,ERR_R_BN_LIB);
			goto err;
			}
		p+=i;
		n-=param_len;

/* We must check if there is a certificate */
#ifndef OPENSSL_NO_RSA
		if (alg_a & SSL_aRSA)
			pkey=X509_get_pubkey(s->session->sess_cert->peer_pkeys[SSL_PKEY_RSA_ENC].x509);
#else
		if (0)
			;
#endif
#ifndef OPENSSL_NO_DSA
		else if (alg_a & SSL_aDSS)
			pkey=X509_get_pubkey(s->session->sess_cert->peer_pkeys[SSL_PKEY_DSA_SIGN].x509);
#endif
		}
	else
#endif /* !OPENSSL_NO_SRP */
#ifndef OPENSSL_NO_RSA
	if (alg_k & SSL_kRSA)
		{
		if ((rsa=RSA_new()) == NULL)
			{
			SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,ERR_R_MALLOC_FAILURE);
			goto err;
			}
		n2s(p,i);
		param_len=i+2;
		if (param_len > n)
			{
			al=SSL_AD_DECODE_ERROR;
			SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,SSL_R_BAD_RSA_MODULUS_LENGTH);
			goto f_err;
			}
		if (!(rsa->n=BN_bin2bn(p,i,rsa->n)))
			{
			SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,ERR_R_BN_LIB);
			goto err;
			}
		p+=i;

		n2s(p,i);
		param_len+=i+2;
		if (param_len > n)
			{
			al=SSL_AD_DECODE_ERROR;
			SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,SSL_R_BAD_RSA_E_LENGTH);
			goto f_err;
			}
		if (!(rsa->e=BN_bin2bn(p,i,rsa->e)))
			{
			SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,ERR_R_BN_LIB);
			goto err;
			}
		p+=i;
		n-=param_len;

		/* this should be because we are using an export cipher */
		if (alg_a & SSL_aRSA)
			pkey=X509_get_pubkey(s->session->sess_cert->peer_pkeys[SSL_PKEY_RSA_ENC].x509);
		else
			{
			SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,ERR_R_INTERNAL_ERROR);
			goto err;
			}
		s->session->sess_cert->peer_rsa_tmp=rsa;
		rsa=NULL;
		}
#else /* OPENSSL_NO_RSA */
	if (0)
		;
#endif
#ifndef OPENSSL_NO_DH
	else if (alg_k & SSL_kEDH)
		{
		if ((dh=DH_new()) == NULL)
			{
			SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,ERR_R_DH_LIB);
			goto err;
			}
		n2s(p,i);
		param_len=i+2;
		if (param_len > n)
			{
			al=SSL_AD_DECODE_ERROR;
			SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,SSL_R_BAD_DH_P_LENGTH);
			goto f_err;
			}
		if (!(dh->p=BN_bin2bn(p,i,NULL)))
			{
			SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,ERR_R_BN_LIB);
			goto err;
			}
		p+=i;

		n2s(p,i);
		param_len+=i+2;
		if (param_len > n)
			{
			al=SSL_AD_DECODE_ERROR;
			SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,SSL_R_BAD_DH_G_LENGTH);
			goto f_err;
			}
		if (!(dh->g=BN_bin2bn(p,i,NULL)))
			{
			SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,ERR_R_BN_LIB);
			goto err;
			}
		p+=i;

		n2s(p,i);
		param_len+=i+2;
		if (param_len > n)
			{
			al=SSL_AD_DECODE_ERROR;
			SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,SSL_R_BAD_DH_PUB_KEY_LENGTH);
			goto f_err;
			}
		if (!(dh->pub_key=BN_bin2bn(p,i,NULL)))
			{
			SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,ERR_R_BN_LIB);
			goto err;
			}
		p+=i;
		n-=param_len;

#ifndef OPENSSL_NO_RSA
		if (alg_a & SSL_aRSA)
			pkey=X509_get_pubkey(s->session->sess_cert->peer_pkeys[SSL_PKEY_RSA_ENC].x509);
#else
		if (0)
			;
#endif
#ifndef OPENSSL_NO_DSA
		else if (alg_a & SSL_aDSS)
			pkey=X509_get_pubkey(s->session->sess_cert->peer_pkeys[SSL_PKEY_DSA_SIGN].x509);
#endif
		/* else anonymous DH, so no certificate or pkey. */

		s->session->sess_cert->peer_dh_tmp=dh;
		dh=NULL;
		}
	else if ((alg_k & SSL_kDHr) || (alg_k & SSL_kDHd))
		{
		al=SSL_AD_ILLEGAL_PARAMETER;
		SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,SSL_R_TRIED_TO_USE_UNSUPPORTED_CIPHER);
		goto f_err;
		}
#endif /* !OPENSSL_NO_DH */

#ifndef OPENSSL_NO_ECDH
	else if (alg_k & SSL_kEECDH)
		{
		EC_GROUP *ngroup;
		const EC_GROUP *group;

		if ((ecdh=EC_KEY_new()) == NULL)
			{
			SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,ERR_R_MALLOC_FAILURE);
			goto err;
			}

		/* Extract elliptic curve parameters and the
		 * server's ephemeral ECDH public key.
		 * Keep accumulating lengths of various components in
		 * param_len and make sure it never exceeds n.
		 */

		/* XXX: For now we only support named (not generic) curves
		 * and the ECParameters in this case is just three bytes.
		 */
		param_len=3;
		if ((param_len > n) ||
		    (*p != NAMED_CURVE_TYPE) || 
		    ((curve_nid = tls1_ec_curve_id2nid(*(p + 2))) == 0)) 
			{
			al=SSL_AD_INTERNAL_ERROR;
			SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,SSL_R_UNABLE_TO_FIND_ECDH_PARAMETERS);
			goto f_err;
			}

		ngroup = EC_GROUP_new_by_curve_name(curve_nid);
		if (ngroup == NULL)
			{
			SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,ERR_R_EC_LIB);
			goto err;
			}
		if (EC_KEY_set_group(ecdh, ngroup) == 0)
			{
			SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,ERR_R_EC_LIB);
			goto err;
			}
		EC_GROUP_free(ngroup);

		group = EC_KEY_get0_group(ecdh);

		if (SSL_C_IS_EXPORT(s->s3->tmp.new_cipher) &&
		    (EC_GROUP_get_degree(group) > 163))
			{
			al=SSL_AD_EXPORT_RESTRICTION;
			SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,SSL_R_ECGROUP_TOO_LARGE_FOR_CIPHER);
			goto f_err;
			}

		p+=3;

		/* Next, get the encoded ECPoint */
		if (((srvr_ecpoint = EC_POINT_new(group)) == NULL) ||
		    ((bn_ctx = BN_CTX_new()) == NULL))
			{
			SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,ERR_R_MALLOC_FAILURE);
			goto err;
			}

		encoded_pt_len = *p;  /* length of encoded point */
		p+=1;
		param_len += (1 + encoded_pt_len);
		if ((param_len > n) ||
		    (EC_POINT_oct2point(group, srvr_ecpoint, 
			p, encoded_pt_len, bn_ctx) == 0))
			{
			al=SSL_AD_DECODE_ERROR;
			SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,SSL_R_BAD_ECPOINT);
			goto f_err;
			}

		n-=param_len;
		p+=encoded_pt_len;

		/* The ECC/TLS specification does not mention
		 * the use of DSA to sign ECParameters in the server
		 * key exchange message. We do support RSA and ECDSA.
		 */
		if (0) ;
#ifndef OPENSSL_NO_RSA
		else if (alg_a & SSL_aRSA)
			pkey=X509_get_pubkey(s->session->sess_cert->peer_pkeys[SSL_PKEY_RSA_ENC].x509);
#endif
#ifndef OPENSSL_NO_ECDSA
		else if (alg_a & SSL_aECDSA)
			pkey=X509_get_pubkey(s->session->sess_cert->peer_pkeys[SSL_PKEY_ECC].x509);
#endif
		/* else anonymous ECDH, so no certificate or pkey. */
		EC_KEY_set_public_key(ecdh, srvr_ecpoint);
		s->session->sess_cert->peer_ecdh_tmp=ecdh;
		ecdh=NULL;
		BN_CTX_free(bn_ctx);
		bn_ctx = NULL;
		EC_POINT_free(srvr_ecpoint);
		srvr_ecpoint = NULL;
		}
	else if (alg_k)
		{
		al=SSL_AD_UNEXPECTED_MESSAGE;
		SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,SSL_R_UNEXPECTED_MESSAGE);
		goto f_err;
		}
#endif /* !OPENSSL_NO_ECDH */


	/* p points to the next byte, there are 'n' bytes left */

	/* if it was signed, check the signature */
	if (pkey != NULL)
		{
		if (TLS1_get_version(s) >= TLS1_2_VERSION)
			{
			int sigalg = tls12_get_sigid(pkey);
			/* Should never happen */
			if (sigalg == -1)
				{
				SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,ERR_R_INTERNAL_ERROR);
				goto err;
				}
			/* Check key type is consistent with signature */
			if (sigalg != (int)p[1])
				{
				SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,SSL_R_WRONG_SIGNATURE_TYPE);
				al=SSL_AD_DECODE_ERROR;
				goto f_err;
				}
			md = tls12_get_hash(p[0]);
			if (md == NULL)
				{
				SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,SSL_R_UNKNOWN_DIGEST);
				al=SSL_AD_DECODE_ERROR;
				goto f_err;
				}
#ifdef SSL_DEBUG
fprintf(stderr, "USING TLSv1.2 HASH %s\n", EVP_MD_name(md));
#endif
			p += 2;
			n -= 2;
			}
		else
			md = EVP_sha1();
			
		n2s(p,i);
		n-=2;
		j=EVP_PKEY_size(pkey);

		if ((i != n) || (n > j) || (n <= 0))
			{
			/* wrong packet length */
			al=SSL_AD_DECODE_ERROR;
			SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,SSL_R_WRONG_SIGNATURE_LENGTH);
			goto f_err;
			}

#ifndef OPENSSL_NO_RSA
		if (pkey->type == EVP_PKEY_RSA && TLS1_get_version(s) < TLS1_2_VERSION)
			{
			int num;

			j=0;
			q=md_buf;
			for (num=2; num > 0; num--)
				{
				EVP_MD_CTX_set_flags(&md_ctx,
					EVP_MD_CTX_FLAG_NON_FIPS_ALLOW);
				EVP_DigestInit_ex(&md_ctx,(num == 2)
					?s->ctx->md5:s->ctx->sha1, NULL);
				EVP_DigestUpdate(&md_ctx,&(s->s3->client_random[0]),SSL3_RANDOM_SIZE);
				EVP_DigestUpdate(&md_ctx,&(s->s3->server_random[0]),SSL3_RANDOM_SIZE);
				EVP_DigestUpdate(&md_ctx,param,param_len);
				EVP_DigestFinal_ex(&md_ctx,q,(unsigned int *)&i);
				q+=i;
				j+=i;
				}
			i=RSA_verify(NID_md5_sha1, md_buf, j, p, n,
								pkey->pkey.rsa);
			if (i < 0)
				{
				al=SSL_AD_DECRYPT_ERROR;
				SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,SSL_R_BAD_RSA_DECRYPT);
				goto f_err;
				}
			if (i == 0)
				{
				/* bad signature */
				al=SSL_AD_DECRYPT_ERROR;
				SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,SSL_R_BAD_SIGNATURE);
				goto f_err;
				}
			}
		else
#endif
			{
			EVP_VerifyInit_ex(&md_ctx, md, NULL);
			EVP_VerifyUpdate(&md_ctx,&(s->s3->client_random[0]),SSL3_RANDOM_SIZE);
			EVP_VerifyUpdate(&md_ctx,&(s->s3->server_random[0]),SSL3_RANDOM_SIZE);
			EVP_VerifyUpdate(&md_ctx,param,param_len);
			if (EVP_VerifyFinal(&md_ctx,p,(int)n,pkey) <= 0)
				{
				/* bad signature */
				al=SSL_AD_DECRYPT_ERROR;
				SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,SSL_R_BAD_SIGNATURE);
				goto f_err;
				}
			}
		}
	else
		{
		if (!(alg_a & SSL_aNULL) && !(alg_k & SSL_kPSK))
			/* aNULL or kPSK do not need public keys */
			{
			SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,ERR_R_INTERNAL_ERROR);
			goto err;
			}
		/* still data left over */
		if (n != 0)
			{
			al=SSL_AD_DECODE_ERROR;
			SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,SSL_R_EXTRA_DATA_IN_MESSAGE);
			goto f_err;
			}
		}
	EVP_PKEY_free(pkey);
	EVP_MD_CTX_cleanup(&md_ctx);
	return(1);
f_err:
	ssl3_send_alert(s,SSL3_AL_FATAL,al);
err:
	EVP_PKEY_free(pkey);
#ifndef OPENSSL_NO_RSA
	if (rsa != NULL)
		RSA_free(rsa);
#endif
#ifndef OPENSSL_NO_DH
	if (dh != NULL)
		DH_free(dh);
#endif
#ifndef OPENSSL_NO_ECDH
	BN_CTX_free(bn_ctx);
	EC_POINT_free(srvr_ecpoint);
	if (ecdh != NULL)
		EC_KEY_free(ecdh);
#endif
	EVP_MD_CTX_cleanup(&md_ctx);
	return(-1);
	}

Project: openssl

int ssl3_get_new_session_ticket(SSL *s)
	{
	int ok,al,ret=0, ticklen;
	long n;
	const unsigned char *p;
	unsigned char *d;

	n=s->method->ssl_get_message(s,
		SSL3_ST_CR_SESSION_TICKET_A,
		SSL3_ST_CR_SESSION_TICKET_B,
		-1,
		16384,
		&ok);

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

	if (s->s3->tmp.message_type == SSL3_MT_FINISHED)
		{
		s->s3->tmp.reuse_message=1;
		return(1);
		}
	if (s->s3->tmp.message_type != SSL3_MT_NEWSESSION_TICKET)
		{
		al=SSL_AD_UNEXPECTED_MESSAGE;
		SSLerr(SSL_F_SSL3_GET_NEW_SESSION_TICKET,SSL_R_BAD_MESSAGE_TYPE);
		goto f_err;
		}
	if (n < 6)
		{
		/* need at least ticket_lifetime_hint + ticket length */
		al = SSL_AD_DECODE_ERROR;
		SSLerr(SSL_F_SSL3_GET_NEW_SESSION_TICKET,SSL_R_LENGTH_MISMATCH);
		goto f_err;
		}

	p=d=(unsigned char *)s->init_msg;
	n2l(p, s->session->tlsext_tick_lifetime_hint);
	n2s(p, ticklen);
	/* ticket_lifetime_hint + ticket_length + ticket */
	if (ticklen + 6 != n)
		{
		al = SSL_AD_DECODE_ERROR;
		SSLerr(SSL_F_SSL3_GET_NEW_SESSION_TICKET,SSL_R_LENGTH_MISMATCH);
		goto f_err;
		}
	if (s->session->tlsext_tick)
		{
		OPENSSL_free(s->session->tlsext_tick);
		s->session->tlsext_ticklen = 0;
		}
	s->session->tlsext_tick = OPENSSL_malloc(ticklen);
	if (!s->session->tlsext_tick)
		{
		SSLerr(SSL_F_SSL3_GET_NEW_SESSION_TICKET,ERR_R_MALLOC_FAILURE);
		goto err;
		}
	memcpy(s->session->tlsext_tick, p, ticklen);
	s->session->tlsext_ticklen = ticklen;
	/* There are two ways to detect a resumed ticket sesion.
	 * One is to set an appropriate session ID and then the server
	 * must return a match in ServerHello. This allows the normal
	 * client session ID matching to work and we know much 
	 * earlier that the ticket has been accepted.
	 * 
	 * The other way is to set zero length session ID when the
	 * ticket is presented and rely on the handshake to determine
	 * session resumption.
	 *
	 * We choose the former approach because this fits in with
	 * assumptions elsewhere in OpenSSL. The session ID is set
	 * to the SHA256 (or SHA1 is SHA256 is disabled) hash of the
	 * ticket.
	 */ 
	EVP_Digest(p, ticklen,
			s->session->session_id, &s->session->session_id_length,
#ifndef OPENSSL_NO_SHA256
							EVP_sha256(), NULL);
#else
							EVP_sha1(), NULL);
#endif
	ret=1;
	return(ret);
f_err:
	ssl3_send_alert(s,SSL3_AL_FATAL,al);
err:
	return(-1);
	}

Project: openssl

int ssl3_get_server_certificate(SSL *s)
	{
	int al,i,ok,ret= -1;
	unsigned long n,nc,llen,l;
	X509 *x=NULL;
	const unsigned char *q,*p;
	unsigned char *d;
	STACK_OF(X509) *sk=NULL;
	SESS_CERT *sc;
	EVP_PKEY *pkey=NULL;
	int need_cert = 1; /* VRS: 0=> will allow null cert if auth == KRB5 */

	n=s->method->ssl_get_message(s,
		SSL3_ST_CR_CERT_A,
		SSL3_ST_CR_CERT_B,
		-1,
		s->max_cert_list,
		&ok);

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

	if ((s->s3->tmp.message_type == SSL3_MT_SERVER_KEY_EXCHANGE) ||
		((s->s3->tmp.new_cipher->algorithm_auth & SSL_aKRB5) && 
		(s->s3->tmp.message_type == SSL3_MT_SERVER_DONE)))
		{
		s->s3->tmp.reuse_message=1;
		return(1);
		}

	if (s->s3->tmp.message_type != SSL3_MT_CERTIFICATE)
		{
		al=SSL_AD_UNEXPECTED_MESSAGE;
		SSLerr(SSL_F_SSL3_GET_SERVER_CERTIFICATE,SSL_R_BAD_MESSAGE_TYPE);
		goto f_err;
		}
	p=d=(unsigned char *)s->init_msg;

	if ((sk=sk_X509_new_null()) == NULL)
		{
		SSLerr(SSL_F_SSL3_GET_SERVER_CERTIFICATE,ERR_R_MALLOC_FAILURE);
		goto err;
		}

	n2l3(p,llen);
	if (llen+3 != n)
		{
		al=SSL_AD_DECODE_ERROR;
		SSLerr(SSL_F_SSL3_GET_SERVER_CERTIFICATE,SSL_R_LENGTH_MISMATCH);
		goto f_err;
		}
	for (nc=0; nc<llen; )
		{
		n2l3(p,l);
		if ((l+nc+3) > llen)
			{
			al=SSL_AD_DECODE_ERROR;
			SSLerr(SSL_F_SSL3_GET_SERVER_CERTIFICATE,SSL_R_CERT_LENGTH_MISMATCH);
			goto f_err;
			}

		q=p;
		x=d2i_X509(NULL,&q,l);
		if (x == NULL)
			{
			al=SSL_AD_BAD_CERTIFICATE;
			SSLerr(SSL_F_SSL3_GET_SERVER_CERTIFICATE,ERR_R_ASN1_LIB);
			goto f_err;
			}
		if (q != (p+l))
			{
			al=SSL_AD_DECODE_ERROR;
			SSLerr(SSL_F_SSL3_GET_SERVER_CERTIFICATE,SSL_R_CERT_LENGTH_MISMATCH);
			goto f_err;
			}
		if (!sk_X509_push(sk,x))
			{
			SSLerr(SSL_F_SSL3_GET_SERVER_CERTIFICATE,ERR_R_MALLOC_FAILURE);
			goto err;
			}
		x=NULL;
		nc+=l+3;
		p=q;
		}

	i=ssl_verify_cert_chain(s,sk);
	if ((s->verify_mode != SSL_VERIFY_NONE) && (i <= 0)
#ifndef OPENSSL_NO_KRB5
	    && !((s->s3->tmp.new_cipher->algorithm_mkey & SSL_kKRB5) &&
		 (s->s3->tmp.new_cipher->algorithm_auth & SSL_aKRB5))
#endif /* OPENSSL_NO_KRB5 */
		)
		{
		al=ssl_verify_alarm_type(s->verify_result);
		SSLerr(SSL_F_SSL3_GET_SERVER_CERTIFICATE,SSL_R_CERTIFICATE_VERIFY_FAILED);
		goto f_err; 
		}
	ERR_clear_error(); /* but we keep s->verify_result */

	sc=ssl_sess_cert_new();
	if (sc == NULL) goto err;

	if (s->session->sess_cert) ssl_sess_cert_free(s->session->sess_cert);
	s->session->sess_cert=sc;

	sc->cert_chain=sk;
	/* Inconsistency alert: cert_chain does include the peer's
	 * certificate, which we don't include in s3_srvr.c */
	x=sk_X509_value(sk,0);
	sk=NULL;
 	/* VRS 19990621: possible memory leak; sk=null ==> !sk_pop_free() @end*/

	pkey=X509_get_pubkey(x);

	/* VRS: allow null cert if auth == KRB5 */
	need_cert = ((s->s3->tmp.new_cipher->algorithm_mkey & SSL_kKRB5) &&
	            (s->s3->tmp.new_cipher->algorithm_auth & SSL_aKRB5))
	            ? 0 : 1;

#ifdef KSSL_DEBUG
	printf("pkey,x = %p, %p\n", pkey,x);
	printf("ssl_cert_type(x,pkey) = %d\n", ssl_cert_type(x,pkey));
	printf("cipher, alg, nc = %s, %lx, %lx, %d\n", s->s3->tmp.new_cipher->name,
		s->s3->tmp.new_cipher->algorithm_mkey, s->s3->tmp.new_cipher->algorithm_auth, need_cert);
#endif    /* KSSL_DEBUG */

	if (need_cert && ((pkey == NULL) || EVP_PKEY_missing_parameters(pkey)))
		{
		x=NULL;
		al=SSL3_AL_FATAL;
		SSLerr(SSL_F_SSL3_GET_SERVER_CERTIFICATE,
			SSL_R_UNABLE_TO_FIND_PUBLIC_KEY_PARAMETERS);
		goto f_err;
		}

	i=ssl_cert_type(x,pkey);
	if (need_cert && i < 0)
		{
		x=NULL;
		al=SSL3_AL_FATAL;
		SSLerr(SSL_F_SSL3_GET_SERVER_CERTIFICATE,
			SSL_R_UNKNOWN_CERTIFICATE_TYPE);
		goto f_err;
		}

	if (need_cert)
		{
		sc->peer_cert_type=i;
		CRYPTO_add(&x->references,1,CRYPTO_LOCK_X509);
		/* Why would the following ever happen?
		 * We just created sc a couple of lines ago. */
		if (sc->peer_pkeys[i].x509 != NULL)
			X509_free(sc->peer_pkeys[i].x509);
		sc->peer_pkeys[i].x509=x;
		sc->peer_key= &(sc->peer_pkeys[i]);

		if (s->session->peer != NULL)
			X509_free(s->session->peer);
		CRYPTO_add(&x->references,1,CRYPTO_LOCK_X509);
		s->session->peer=x;
		}
	else
		{
		sc->peer_cert_type=i;
		sc->peer_key= NULL;

		if (s->session->peer != NULL)
			X509_free(s->session->peer);
		s->session->peer=NULL;
		}
	s->session->verify_result = s->verify_result;

	x=NULL;
	ret=1;

	if (0)
		{
f_err:
		ssl3_send_alert(s,SSL3_AL_FATAL,al);
		}
err:
	EVP_PKEY_free(pkey);
	X509_free(x);
	sk_X509_pop_free(sk,X509_free);
	return(ret);
	}

Project: openssl

int ssl3_get_server_done(SSL *s)
	{
	int ok,ret=0;
	long n;

	n=s->method->ssl_get_message(s,
		SSL3_ST_CR_SRVR_DONE_A,
		SSL3_ST_CR_SRVR_DONE_B,
		SSL3_MT_SERVER_DONE,
		30, /* should be very small, like 0 :-) */
		&ok);

	if (!ok) return((int)n);
	if (n > 0)
		{
		/* should contain no data */
		ssl3_send_alert(s,SSL3_AL_FATAL,SSL_AD_DECODE_ERROR);
		SSLerr(SSL_F_SSL3_GET_SERVER_DONE,SSL_R_LENGTH_MISMATCH);
		return -1;
		}
	ret=1;
	return(ret);
	}

Project: openssl

int ssl3_send_client_key_exchange(SSL *s)
	{
	unsigned char *p,*d;
	int n;
	unsigned long alg_k;
#ifndef OPENSSL_NO_RSA
	unsigned char *q;
	EVP_PKEY *pkey=NULL;
#endif
#ifndef OPENSSL_NO_KRB5
	KSSL_ERR kssl_err;
#endif /* OPENSSL_NO_KRB5 */
#ifndef OPENSSL_NO_ECDH
	EC_KEY *clnt_ecdh = NULL;
	const EC_POINT *srvr_ecpoint = NULL;
	EVP_PKEY *srvr_pub_pkey = NULL;
	unsigned char *encodedPoint = NULL;
	int encoded_pt_len = 0;
	BN_CTX * bn_ctx = NULL;
#endif

	if (s->state == SSL3_ST_CW_KEY_EXCH_A)
		{
		d=(unsigned char *)s->init_buf->data;
		p= &(d[4]);

		alg_k=s->s3->tmp.new_cipher->algorithm_mkey;

		/* Fool emacs indentation */
		if (0) {}
#ifndef OPENSSL_NO_RSA
		else if (alg_k & SSL_kRSA)
			{
			RSA *rsa;
			unsigned char tmp_buf[SSL_MAX_MASTER_KEY_LENGTH];

			if (s->session->sess_cert == NULL)
				{
				/* We should always have a server certificate with SSL_kRSA. */
				SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE,ERR_R_INTERNAL_ERROR);
				goto err;
				}

			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_SSL3_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 beyond */
			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_SSL3_SEND_CLIENT_KEY_EXCHANGE,SSL_R_BAD_RSA_ENCRYPT);
				goto err;
				}

			/* Fix buf for TLS and beyond */
			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 (alg_k & 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;
			const 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",
				alg_k, 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_SSL3_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;
				}
 
			    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;

			/*  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 > (int)sizeof epms)
				{
				SSLerr(SSL_F_SSL3_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 (alg_k & (SSL_kEDH|SSL_kDHr|SSL_kDHd))
			{
			DH *dh_srvr,*dh_clnt;

			if (s->session->sess_cert == NULL) 
				{
				ssl3_send_alert(s,SSL3_AL_FATAL,SSL_AD_UNEXPECTED_MESSAGE);
				SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE,SSL_R_UNEXPECTED_MESSAGE);
				goto err;
				}

			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_SSL3_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_SSL3_SEND_CLIENT_KEY_EXCHANGE,ERR_R_DH_LIB);
				goto err;
				}
			if (!DH_generate_key(dh_clnt))
				{
				SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE,ERR_R_DH_LIB);
				DH_free(dh_clnt);
				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_SSL3_SEND_CLIENT_KEY_EXCHANGE,ERR_R_DH_LIB);
				DH_free(dh_clnt);
				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

#ifndef OPENSSL_NO_ECDH 
		else if (alg_k & (SSL_kEECDH|SSL_kECDHr|SSL_kECDHe))
			{
			const EC_GROUP *srvr_group = NULL;
			EC_KEY *tkey;
			int ecdh_clnt_cert = 0;
			int field_size = 0;

			if (s->session->sess_cert == NULL) 
				{
				ssl3_send_alert(s,SSL3_AL_FATAL,SSL_AD_UNEXPECTED_MESSAGE);
				SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE,SSL_R_UNEXPECTED_MESSAGE);
				goto err;
				}

			/* Did we send out the client's
			 * ECDH share for use in premaster
			 * computation as part of client certificate?
			 * If so, set ecdh_clnt_cert to 1.
			 */
			if ((alg_k & (SSL_kECDHr|SSL_kECDHe)) && (s->cert != NULL)) 
				{
				/* XXX: For now, we do not support client
				 * authentication using ECDH certificates.
				 * To add such support, one needs to add
				 * code that checks for appropriate 
				 * conditions and sets ecdh_clnt_cert to 1.
				 * For example, the cert have an ECC
				 * key on the same curve as the server's
				 * and the key should be authorized for
				 * key agreement.
				 *
				 * One also needs to add code in ssl3_connect
				 * to skip sending the certificate verify
				 * message.
				 *
				 * if ((s->cert->key->privatekey != NULL) &&
				 *     (s->cert->key->privatekey->type ==
				 *      EVP_PKEY_EC) && ...)
				 * ecdh_clnt_cert = 1;
				 */
				}

			if (s->session->sess_cert->peer_ecdh_tmp != NULL)
				{
				tkey = s->session->sess_cert->peer_ecdh_tmp;
				}
			else
				{
				/* Get the Server Public Key from Cert */
				srvr_pub_pkey = X509_get_pubkey(s->session-> \
				    sess_cert->peer_pkeys[SSL_PKEY_ECC].x509);
				if ((srvr_pub_pkey == NULL) ||
				    (srvr_pub_pkey->type != EVP_PKEY_EC) ||
				    (srvr_pub_pkey->pkey.ec == NULL))
					{
					SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE,
					    ERR_R_INTERNAL_ERROR);
					goto err;
					}

				tkey = srvr_pub_pkey->pkey.ec;
				}

			srvr_group   = EC_KEY_get0_group(tkey);
			srvr_ecpoint = EC_KEY_get0_public_key(tkey);

			if ((srvr_group == NULL) || (srvr_ecpoint == NULL))
				{
				SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE,
				    ERR_R_INTERNAL_ERROR);
				goto err;
				}

			if ((clnt_ecdh=EC_KEY_new()) == NULL) 
				{
				SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE,ERR_R_MALLOC_FAILURE);
				goto err;
				}

			if (!EC_KEY_set_group(clnt_ecdh, srvr_group))
				{
				SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE,ERR_R_EC_LIB);
				goto err;
				}
			if (ecdh_clnt_cert) 
				{ 
				/* Reuse key info from our certificate
				 * We only need our private key to perform
				 * the ECDH computation.
				 */
				const BIGNUM *priv_key;
				tkey = s->cert->key->privatekey->pkey.ec;
				priv_key = EC_KEY_get0_private_key(tkey);
				if (priv_key == NULL)
					{
					SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE,ERR_R_MALLOC_FAILURE);
					goto err;
					}
				if (!EC_KEY_set_private_key(clnt_ecdh, priv_key))
					{
					SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE,ERR_R_EC_LIB);
					goto err;
					}
				}
			else 
				{
				/* Generate a new ECDH key pair */
				if (!(EC_KEY_generate_key(clnt_ecdh)))
					{
					SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE, ERR_R_ECDH_LIB);
					goto err;
					}
				}

			/* use the 'p' output buffer for the ECDH key, but
			 * make sure to clear it out afterwards
			 */

			field_size = EC_GROUP_get_degree(srvr_group);
			if (field_size <= 0)
				{
				SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE, 
				       ERR_R_ECDH_LIB);
				goto err;
				}
			n=ECDH_compute_key(p, (field_size+7)/8, srvr_ecpoint, clnt_ecdh, NULL);
			if (n <= 0)
				{
				SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE, 
				       ERR_R_ECDH_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);

			memset(p, 0, n); /* clean up */

			if (ecdh_clnt_cert) 
				{
				/* Send empty client key exch message */
				n = 0;
				}
			else 
				{
				/* First check the size of encoding and
				 * allocate memory accordingly.
				 */
				encoded_pt_len = 
				    EC_POINT_point2oct(srvr_group, 
					EC_KEY_get0_public_key(clnt_ecdh), 
					POINT_CONVERSION_UNCOMPRESSED, 
					NULL, 0, NULL);

				encodedPoint = (unsigned char *) 
				    OPENSSL_malloc(encoded_pt_len * 
					sizeof(unsigned char)); 
				bn_ctx = BN_CTX_new();
				if ((encodedPoint == NULL) || 
				    (bn_ctx == NULL)) 
					{
					SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE,ERR_R_MALLOC_FAILURE);
					goto err;
					}

				/* Encode the public key */
				n = EC_POINT_point2oct(srvr_group, 
				    EC_KEY_get0_public_key(clnt_ecdh), 
				    POINT_CONVERSION_UNCOMPRESSED, 
				    encodedPoint, encoded_pt_len, bn_ctx);

				*p = n; /* length of encoded point */
				/* Encoded point will be copied here */
				p += 1; 
				/* copy the point */
				memcpy((unsigned char *)p, encodedPoint, n);
				/* increment n to account for length field */
				n += 1; 
				}

			/* Free allocated memory */
			BN_CTX_free(bn_ctx);
			if (encodedPoint != NULL) OPENSSL_free(encodedPoint);
			if (clnt_ecdh != NULL) 
				 EC_KEY_free(clnt_ecdh);
			EVP_PKEY_free(srvr_pub_pkey);
			}
#endif /* !OPENSSL_NO_ECDH */
		else if (alg_k & SSL_kGOST) 
			{
			/* GOST key exchange message creation */
			EVP_PKEY_CTX *pkey_ctx;
			X509 *peer_cert; 
			size_t msglen;
			unsigned int md_len;
			int keytype;
			unsigned char premaster_secret[32],shared_ukm[32], tmp[256];
			EVP_MD_CTX *ukm_hash;
			EVP_PKEY *pub_key;

			/* Get server sertificate PKEY and create ctx from it */
			peer_cert=s->session->sess_cert->peer_pkeys[(keytype=SSL_PKEY_GOST01)].x509;
			if (!peer_cert) 
				peer_cert=s->session->sess_cert->peer_pkeys[(keytype=SSL_PKEY_GOST94)].x509;
			if (!peer_cert)		{
					SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE,SSL_R_NO_GOST_CERTIFICATE_SENT_BY_PEER);
					goto err;
				}	
				
			pkey_ctx=EVP_PKEY_CTX_new(pub_key=X509_get_pubkey(peer_cert),NULL);
			/* If we have send a certificate, and certificate key

			 * parameters match those of server certificate, use
			 * certificate key for key exchange
			 */

			 /* Otherwise, generate ephemeral key pair */
					
			EVP_PKEY_encrypt_init(pkey_ctx);
			  /* Generate session key */	
		    RAND_bytes(premaster_secret,32);
			/* If we have client certificate, use its secret as peer key */
			if (s->s3->tmp.cert_req && s->cert->key->privatekey) {
				if (EVP_PKEY_derive_set_peer(pkey_ctx,s->cert->key->privatekey) <=0) {
					/* If there was an error - just ignore it. Ephemeral key
					* would be used
					*/
					ERR_clear_error();
				}
			}			
			/* Compute shared IV and store it in algorithm-specific
			 * context data */
			ukm_hash = EVP_MD_CTX_create();
			EVP_DigestInit(ukm_hash,EVP_get_digestbynid(NID_id_GostR3411_94));
			EVP_DigestUpdate(ukm_hash,s->s3->client_random,SSL3_RANDOM_SIZE);
			EVP_DigestUpdate(ukm_hash,s->s3->server_random,SSL3_RANDOM_SIZE);
			EVP_DigestFinal_ex(ukm_hash, shared_ukm, &md_len);
			EVP_MD_CTX_destroy(ukm_hash);
			if (EVP_PKEY_CTX_ctrl(pkey_ctx,-1,EVP_PKEY_OP_ENCRYPT,EVP_PKEY_CTRL_SET_IV,
				8,shared_ukm)<0) {
					SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE,
						SSL_R_LIBRARY_BUG);
					goto err;
				}	
			/* Make GOST keytransport blob message */
			/*Encapsulate it into sequence */
			*(p++)=V_ASN1_SEQUENCE | V_ASN1_CONSTRUCTED;
			msglen=255;
			if (EVP_PKEY_encrypt(pkey_ctx,tmp,&msglen,premaster_secret,32)<0) {
			SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE,
					SSL_R_LIBRARY_BUG);
				goto err;
			}
			if (msglen >= 0x80)
				{
				*(p++)=0x81;
				*(p++)= msglen & 0xff;
				n=msglen+3;
				}
			else
				{
				*(p++)= msglen & 0xff;
				n=msglen+2;
				}
			memcpy(p, tmp, msglen);
			/* Check if pubkey from client certificate was used */
			if (EVP_PKEY_CTX_ctrl(pkey_ctx, -1, -1, EVP_PKEY_CTRL_PEER_KEY, 2, NULL) > 0)
				{
				/* Set flag "skip certificate verify" */
				s->s3->flags |= TLS1_FLAGS_SKIP_CERT_VERIFY;
				}
			EVP_PKEY_CTX_free(pkey_ctx);
			s->session->master_key_length=
				s->method->ssl3_enc->generate_master_secret(s,
					s->session->master_key,premaster_secret,32);
			EVP_PKEY_free(pub_key);

			}
#ifndef OPENSSL_NO_SRP
		else if (alg_k & SSL_kSRP)
			{
			if (s->srp_ctx.A != NULL)
				{
				/* send off the data */
				n=BN_num_bytes(s->srp_ctx.A);
				s2n(n,p);
				BN_bn2bin(s->srp_ctx.A,p);
				n+=2;
				}
			else
				{
				SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE,ERR_R_INTERNAL_ERROR);
				goto err;
				}
			if (s->session->srp_username != NULL)
				OPENSSL_free(s->session->srp_username);
			s->session->srp_username = BUF_strdup(s->srp_ctx.login);
			if (s->session->srp_username == NULL)
				{
				SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE,
					ERR_R_MALLOC_FAILURE);
				goto err;
				}

			if ((s->session->master_key_length = SRP_generate_client_master_secret(s,s->session->master_key))<0)
				{
				SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE,ERR_R_INTERNAL_ERROR);
				goto err;
				}
			}
#endif
#ifndef OPENSSL_NO_PSK
		else if (alg_k & SSL_kPSK)
			{
			char identity[PSK_MAX_IDENTITY_LEN];
			unsigned char *t = NULL;
			unsigned char psk_or_pre_ms[PSK_MAX_PSK_LEN*2+4];
			unsigned int pre_ms_len = 0, psk_len = 0;
			int psk_err = 1;

			n = 0;
			if (s->psk_client_callback == NULL)
				{
				SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE,
					SSL_R_PSK_NO_CLIENT_CB);
				goto err;
				}

			psk_len = s->psk_client_callback(s, s->ctx->psk_identity_hint,
				identity, PSK_MAX_IDENTITY_LEN,
				psk_or_pre_ms, sizeof(psk_or_pre_ms));
			if (psk_len > PSK_MAX_PSK_LEN)
				{
				SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE,
					ERR_R_INTERNAL_ERROR);
				goto psk_err;
				}
			else if (psk_len == 0)
				{
				SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE,
					SSL_R_PSK_IDENTITY_NOT_FOUND);
				goto psk_err;
				}

			/* create PSK pre_master_secret */
			pre_ms_len = 2+psk_len+2+psk_len;
			t = psk_or_pre_ms;
			memmove(psk_or_pre_ms+psk_len+4, psk_or_pre_ms, psk_len);
			s2n(psk_len, t);
			memset(t, 0, psk_len);
			t+=psk_len;
			s2n(psk_len, t);

			if (s->session->psk_identity_hint != NULL)
				OPENSSL_free(s->session->psk_identity_hint);
			s->session->psk_identity_hint = BUF_strdup(s->ctx->psk_identity_hint);
			if (s->ctx->psk_identity_hint != NULL &&
				s->session->psk_identity_hint == NULL)
				{
				SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE,
					ERR_R_MALLOC_FAILURE);
				goto psk_err;
				}

			if (s->session->psk_identity != NULL)
				OPENSSL_free(s->session->psk_identity);
			s->session->psk_identity = BUF_strdup(identity);
			if (s->session->psk_identity == NULL)
				{
				SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE,
					ERR_R_MALLOC_FAILURE);
				goto psk_err;
				}

			s->session->master_key_length =
				s->method->ssl3_enc->generate_master_secret(s,
					s->session->master_key,
					psk_or_pre_ms, pre_ms_len); 
			n = strlen(identity);
			s2n(n, p);
			memcpy(p, identity, n);
			n+=2;
			psk_err = 0;
		psk_err:
			OPENSSL_cleanse(identity, PSK_MAX_IDENTITY_LEN);
			OPENSSL_cleanse(psk_or_pre_ms, sizeof(psk_or_pre_ms));
			if (psk_err != 0)
				{
				ssl3_send_alert(s, SSL3_AL_FATAL, SSL_AD_HANDSHAKE_FAILURE);
				goto err;
				}
			}
#endif
		else
			{
			ssl3_send_alert(s, SSL3_AL_FATAL,
			    SSL_AD_HANDSHAKE_FAILURE);
			SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE,
			    ERR_R_INTERNAL_ERROR);
			goto err;
			}
		
		*(d++)=SSL3_MT_CLIENT_KEY_EXCHANGE;
		l2n3(n,d);

		s->state=SSL3_ST_CW_KEY_EXCH_B;
		/* number of bytes to write */
		s->init_num=n+4;
		s->init_off=0;
		}

	/* SSL3_ST_CW_KEY_EXCH_B */
	return(ssl3_do_write(s,SSL3_RT_HANDSHAKE));
err:
#ifndef OPENSSL_NO_ECDH
	BN_CTX_free(bn_ctx);
	if (encodedPoint != NULL) OPENSSL_free(encodedPoint);
	if (clnt_ecdh != NULL) 
		EC_KEY_free(clnt_ecdh);
	EVP_PKEY_free(srvr_pub_pkey);
#endif
	return(-1);
	}

Project: openssl

int ssl3_send_client_verify(SSL *s)
	{
	unsigned char *p,*d;
	unsigned char data[MD5_DIGEST_LENGTH+SHA_DIGEST_LENGTH];
	EVP_PKEY *pkey;
	EVP_PKEY_CTX *pctx=NULL;
	EVP_MD_CTX mctx;
	unsigned u=0;
	unsigned long n;
	int j;

	EVP_MD_CTX_init(&mctx);

	if (s->state == SSL3_ST_CW_CERT_VRFY_A)
		{
		d=(unsigned char *)s->init_buf->data;
		p= &(d[4]);
		pkey=s->cert->key->privatekey;
/* Create context from key and test if sha1 is allowed as digest */
		pctx = EVP_PKEY_CTX_new(pkey,NULL);
		EVP_PKEY_sign_init(pctx);
		if (EVP_PKEY_CTX_set_signature_md(pctx, EVP_sha1())>0)
			{
			if (TLS1_get_version(s) < TLS1_2_VERSION)
				s->method->ssl3_enc->cert_verify_mac(s,
						NID_sha1,
						&(data[MD5_DIGEST_LENGTH]));
			}
		else
			{
			ERR_clear_error();
			}
		/* For TLS v1.2 send signature algorithm and signature
		 * using agreed digest and cached handshake records.
		 */
		if (TLS1_get_version(s) >= TLS1_2_VERSION)
			{
			long hdatalen = 0;
			void *hdata;
			const EVP_MD *md = s->cert->key->digest;
			hdatalen = BIO_get_mem_data(s->s3->handshake_buffer,
								&hdata);
			if (hdatalen <= 0 || !tls12_get_sigandhash(p, pkey, md))
				{
				SSLerr(SSL_F_SSL3_SEND_CLIENT_VERIFY,
						ERR_R_INTERNAL_ERROR);
				goto err;
				}
			p += 2;
#ifdef SSL_DEBUG
			fprintf(stderr, "Using TLS 1.2 with client alg %s\n",
							EVP_MD_name(md));
#endif
			if (!EVP_SignInit_ex(&mctx, md, NULL)
				|| !EVP_SignUpdate(&mctx, hdata, hdatalen)
				|| !EVP_SignFinal(&mctx, p + 2, &u, pkey))
				{
				SSLerr(SSL_F_SSL3_SEND_CLIENT_VERIFY,
						ERR_R_EVP_LIB);
				goto err;
				}
			s2n(u,p);
			n = u + 4;
			if (!ssl3_digest_cached_records(s))
				goto err;
			}
		else
#ifndef OPENSSL_NO_RSA
		if (pkey->type == EVP_PKEY_RSA)
			{
			s->method->ssl3_enc->cert_verify_mac(s,
				NID_md5,
			 	&(data[0]));
			if (RSA_sign(NID_md5_sha1, data,
					 MD5_DIGEST_LENGTH+SHA_DIGEST_LENGTH,
					&(p[2]), &u, pkey->pkey.rsa) <= 0 )
				{
				SSLerr(SSL_F_SSL3_SEND_CLIENT_VERIFY,ERR_R_RSA_LIB);
				goto err;
				}
			s2n(u,p);
			n=u+2;
			}
		else
#endif
#ifndef OPENSSL_NO_DSA
			if (pkey->type == EVP_PKEY_DSA)
			{
			if (!DSA_sign(pkey->save_type,
				&(data[MD5_DIGEST_LENGTH]),
				SHA_DIGEST_LENGTH,&(p[2]),
				(unsigned int *)&j,pkey->pkey.dsa))
				{
				SSLerr(SSL_F_SSL3_SEND_CLIENT_VERIFY,ERR_R_DSA_LIB);
				goto err;
				}
			s2n(j,p);
			n=j+2;
			}
		else
#endif
#ifndef OPENSSL_NO_ECDSA
			if (pkey->type == EVP_PKEY_EC)
			{
			if (!ECDSA_sign(pkey->save_type,
				&(data[MD5_DIGEST_LENGTH]),
				SHA_DIGEST_LENGTH,&(p[2]),
				(unsigned int *)&j,pkey->pkey.ec))
				{
				SSLerr(SSL_F_SSL3_SEND_CLIENT_VERIFY,
				    ERR_R_ECDSA_LIB);
				goto err;
				}
			s2n(j,p);
			n=j+2;
			}
		else
#endif
		if (pkey->type == NID_id_GostR3410_94 || pkey->type == NID_id_GostR3410_2001) 
		{
		unsigned char signbuf[64];
		int i;
		size_t sigsize=64;
		s->method->ssl3_enc->cert_verify_mac(s,
			NID_id_GostR3411_94,
			data);
		if (EVP_PKEY_sign(pctx, signbuf, &sigsize, data, 32) <= 0) {
			SSLerr(SSL_F_SSL3_SEND_CLIENT_VERIFY,
			ERR_R_INTERNAL_ERROR);
			goto err;
		}
		for (i=63,j=0; i>=0; j++, i--) {
			p[2+j]=signbuf[i];
		}	
		s2n(j,p);
		n=j+2;
		}
		else
		{
			SSLerr(SSL_F_SSL3_SEND_CLIENT_VERIFY,ERR_R_INTERNAL_ERROR);
			goto err;
		}
		*(d++)=SSL3_MT_CERTIFICATE_VERIFY;
		l2n3(n,d);

		s->state=SSL3_ST_CW_CERT_VRFY_B;
		s->init_num=(int)n+4;
		s->init_off=0;
		}
	EVP_MD_CTX_cleanup(&mctx);
	EVP_PKEY_CTX_free(pctx);
	return(ssl3_do_write(s,SSL3_RT_HANDSHAKE));
err:
	EVP_MD_CTX_cleanup(&mctx);
	EVP_PKEY_CTX_free(pctx);
	return(-1);
	}

Project: openssl

SSL_CTX *SSL_CTX_new(const SSL_METHOD *meth)
	{
	SSL_CTX *ret=NULL;

	if (meth == NULL)
		{
		SSLerr(SSL_F_SSL_CTX_NEW,SSL_R_NULL_SSL_METHOD_PASSED);
		return(NULL);
		}

#ifdef OPENSSL_FIPS
	if (FIPS_mode() && (meth->version < TLS1_VERSION))	
		{
		SSLerr(SSL_F_SSL_CTX_NEW, SSL_R_ONLY_TLS_ALLOWED_IN_FIPS_MODE);
		return NULL;
		}
#endif

	if (SSL_get_ex_data_X509_STORE_CTX_idx() < 0)
		{
		SSLerr(SSL_F_SSL_CTX_NEW,SSL_R_X509_VERIFICATION_SETUP_PROBLEMS);
		goto err;
		}
	ret=(SSL_CTX *)OPENSSL_malloc(sizeof(SSL_CTX));
	if (ret == NULL)
		goto err;

	memset(ret,0,sizeof(SSL_CTX));

	ret->method=meth;

	ret->cert_store=NULL;
	ret->session_cache_mode=SSL_SESS_CACHE_SERVER;
	ret->session_cache_size=SSL_SESSION_CACHE_MAX_SIZE_DEFAULT;
	ret->session_cache_head=NULL;
	ret->session_cache_tail=NULL;

	/* We take the system default */
	ret->session_timeout=meth->get_timeout();

	ret->new_session_cb=0;
	ret->remove_session_cb=0;
	ret->get_session_cb=0;
	ret->generate_session_id=0;

	memset((char *)&ret->stats,0,sizeof(ret->stats));

	ret->references=1;
	ret->quiet_shutdown=0;

/*	ret->cipher=NULL;*/
/*	ret->s2->challenge=NULL;
	ret->master_key=NULL;
	ret->key_arg=NULL;
	ret->s2->conn_id=NULL; */

	ret->info_callback=NULL;

	ret->app_verify_callback=0;
	ret->app_verify_arg=NULL;

	ret->max_cert_list=SSL_MAX_CERT_LIST_DEFAULT;
	ret->read_ahead=0;
	ret->msg_callback=0;
	ret->msg_callback_arg=NULL;
	ret->verify_mode=SSL_VERIFY_NONE;
#if 0
	ret->verify_depth=-1; /* Don't impose a limit (but x509_lu.c does) */
#endif
	ret->sid_ctx_length=0;
	ret->default_verify_callback=NULL;
	if ((ret->cert=ssl_cert_new()) == NULL)
		goto err;

	ret->default_passwd_callback=0;
	ret->default_passwd_callback_userdata=NULL;
	ret->client_cert_cb=0;
	ret->app_gen_cookie_cb=0;
	ret->app_verify_cookie_cb=0;

	ret->sessions=lh_SSL_SESSION_new();
	if (ret->sessions == NULL) goto err;
	ret->cert_store=X509_STORE_new();
	if (ret->cert_store == NULL) goto err;

	ssl_create_cipher_list(ret->method,
		&ret->cipher_list,&ret->cipher_list_by_id,
		meth->version == SSL2_VERSION ? "SSLv2" : SSL_DEFAULT_CIPHER_LIST);
	if (ret->cipher_list == NULL
	    || sk_SSL_CIPHER_num(ret->cipher_list) <= 0)
		{
		SSLerr(SSL_F_SSL_CTX_NEW,SSL_R_LIBRARY_HAS_NO_CIPHERS);
		goto err2;
		}

	ret->param = X509_VERIFY_PARAM_new();
	if (!ret->param)
		goto err;

	if ((ret->rsa_md5=EVP_get_digestbyname("ssl2-md5")) == NULL)
		{
		SSLerr(SSL_F_SSL_CTX_NEW,SSL_R_UNABLE_TO_LOAD_SSL2_MD5_ROUTINES);
		goto err2;
		}
	if ((ret->md5=EVP_get_digestbyname("ssl3-md5")) == NULL)
		{
		SSLerr(SSL_F_SSL_CTX_NEW,SSL_R_UNABLE_TO_LOAD_SSL3_MD5_ROUTINES);
		goto err2;
		}
	if ((ret->sha1=EVP_get_digestbyname("ssl3-sha1")) == NULL)
		{
		SSLerr(SSL_F_SSL_CTX_NEW,SSL_R_UNABLE_TO_LOAD_SSL3_SHA1_ROUTINES);
		goto err2;
		}

	if ((ret->client_CA=sk_X509_NAME_new_null()) == NULL)
		goto err;

	CRYPTO_new_ex_data(CRYPTO_EX_INDEX_SSL_CTX, ret, &ret->ex_data);

	ret->extra_certs=NULL;
	/* No compression for DTLS */
	if (meth->version != DTLS1_VERSION)
		ret->comp_methods=SSL_COMP_get_compression_methods();

	ret->max_send_fragment = SSL3_RT_MAX_PLAIN_LENGTH;

#ifndef OPENSSL_NO_TLSEXT
	ret->tlsext_servername_callback = 0;
	ret->tlsext_servername_arg = NULL;
	/* Setup RFC4507 ticket keys */
	if ((RAND_pseudo_bytes(ret->tlsext_tick_key_name, 16) <= 0)
		|| (RAND_bytes(ret->tlsext_tick_hmac_key, 16) <= 0)
		|| (RAND_bytes(ret->tlsext_tick_aes_key, 16) <= 0))
		ret->options |= SSL_OP_NO_TICKET;

	ret->tlsext_status_cb = 0;
	ret->tlsext_status_arg = NULL;

# ifndef OPENSSL_NO_NEXTPROTONEG
	ret->next_protos_advertised_cb = 0;
	ret->next_proto_select_cb = 0;
# endif
#endif
#ifndef OPENSSL_NO_PSK
	ret->psk_identity_hint=NULL;
	ret->psk_client_callback=NULL;
	ret->psk_server_callback=NULL;
#endif
#ifndef OPENSSL_NO_SRP
	SSL_CTX_SRP_CTX_init(ret);
#endif
#ifndef OPENSSL_NO_BUF_FREELISTS
	ret->freelist_max_len = SSL_MAX_BUF_FREELIST_LEN_DEFAULT;
	ret->rbuf_freelist = OPENSSL_malloc(sizeof(SSL3_BUF_FREELIST));
	if (!ret->rbuf_freelist)
		goto err;
	ret->rbuf_freelist->chunklen = 0;
	ret->rbuf_freelist->len = 0;
	ret->rbuf_freelist->head = NULL;
	ret->wbuf_freelist = OPENSSL_malloc(sizeof(SSL3_BUF_FREELIST));
	if (!ret->wbuf_freelist)
		{
		OPENSSL_free(ret->rbuf_freelist);
		goto err;
		}
	ret->wbuf_freelist->chunklen = 0;
	ret->wbuf_freelist->len = 0;
	ret->wbuf_freelist->head = NULL;
#endif
#ifndef OPENSSL_NO_ENGINE
	ret->client_cert_engine = NULL;
#ifdef OPENSSL_SSL_CLIENT_ENGINE_AUTO
#define eng_strx(x)	#x
#define eng_str(x)	eng_strx(x)
	/* Use specific client engine automatically... ignore errors */
	{
	ENGINE *eng;
	eng = ENGINE_by_id(eng_str(OPENSSL_SSL_CLIENT_ENGINE_AUTO));
	if (!eng)
		{
		ERR_clear_error();
		ENGINE_load_builtin_engines();
		eng = ENGINE_by_id(eng_str(OPENSSL_SSL_CLIENT_ENGINE_AUTO));
		}
	if (!eng || !SSL_CTX_set_client_cert_engine(ret, eng))
		ERR_clear_error();
	}
#endif
#endif
	/* Default is to connect to non-RI servers. When RI is more widely
	 * deployed might change this.
	 */
	ret->options |= SSL_OP_LEGACY_SERVER_CONNECT;

	return(ret);
err:
	SSLerr(SSL_F_SSL_CTX_NEW,ERR_R_MALLOC_FAILURE);
err2:
	if (ret != NULL) SSL_CTX_free(ret);
	return(NULL);
	}

Project: openssl

void SSL_CTX_set_next_proto_select_cb(SSL_CTX *ctx, int (*cb) (SSL *s, unsigned char **out, unsigned char *outlen, const unsigned char *in, unsigned int inlen, void *arg), void *arg)
	{
	ctx->next_proto_select_cb = cb;
	ctx->next_proto_select_cb_arg = arg;
	}

Project: openssl

void SSL_CTX_set_next_protos_advertised_cb(SSL_CTX *ctx, int (*cb) (SSL *ssl, const unsigned char **out, unsigned int *outlen, void *arg), void *arg)
	{
	ctx->next_protos_advertised_cb = cb;
	ctx->next_protos_advertised_cb_arg = arg;
	}

Project: openssl

int SSL_cache_hit(SSL *s)
	{
	return s->hit;
	}

Project: openssl

int SSL_clear(SSL *s)
	{

	if (s->method == NULL)
		{
		SSLerr(SSL_F_SSL_CLEAR,SSL_R_NO_METHOD_SPECIFIED);
		return(0);
		}

	if (ssl_clear_bad_session(s))
		{
		SSL_SESSION_free(s->session);
		s->session=NULL;
		}

	s->error=0;
	s->hit=0;
	s->shutdown=0;

#if 0 /* Disabled since version 1.10 of this file (early return not
       * needed because SSL_clear is not called when doing renegotiation) */
	/* This is set if we are doing dynamic renegotiation so keep
	 * the old cipher.  It is sort of a SSL_clear_lite :-) */
	if (s->renegotiate) return(1);
#else
	if (s->renegotiate)
		{
		SSLerr(SSL_F_SSL_CLEAR,ERR_R_INTERNAL_ERROR);
		return 0;
		}
#endif

	s->type=0;

	s->state=SSL_ST_BEFORE|((s->server)?SSL_ST_ACCEPT:SSL_ST_CONNECT);

	s->version=s->method->version;
	s->client_version=s->version;
	s->rwstate=SSL_NOTHING;
	s->rstate=SSL_ST_READ_HEADER;
#if 0
	s->read_ahead=s->ctx->read_ahead;
#endif

	if (s->init_buf != NULL)
		{
		BUF_MEM_free(s->init_buf);
		s->init_buf=NULL;
		}

	ssl_clear_cipher_ctx(s);
	ssl_clear_hash_ctx(&s->read_hash);
	ssl_clear_hash_ctx(&s->write_hash);

	s->first_packet=0;

#if 1
	/* Check to see if we were changed into a different method, if
	 * so, revert back if we are not doing session-id reuse. */
	if (!s->in_handshake && (s->session == NULL) && (s->method != s->ctx->method))
		{
		s->method->ssl_free(s);
		s->method=s->ctx->method;
		if (!s->method->ssl_new(s))
			return(0);
		}
	else
#endif
		s->method->ssl_clear(s);
	return(1);
	}

Project: openssl

int SSL_export_keying_material(SSL *s, unsigned char *out, size_t olen,
	const char *label, size_t llen, const unsigned char *p, size_t plen,
	int use_context)
	{
	if (s->version < TLS1_VERSION)
		return -1;

	return s->method->ssl3_enc->export_keying_material(s, out, olen, label,
							   llen, p, plen,
							   use_context);
	}

Project: openssl

void SSL_set_debug(SSL *s, int debug)
	{
	s->debug = debug;
	}

Project: openssl

void ssl_clear_hash_ctx(EVP_MD_CTX **hash) 
{

	if (*hash) EVP_MD_CTX_destroy(*hash);
	*hash=NULL;
}

Project: openssl

static int ssl_session_cmp(const SSL_SESSION *a,const SSL_SESSION *b)
	{
	if (a->ssl_version != b->ssl_version)
		return(1);
	if (a->session_id_length != b->session_id_length)
		return(1);
	return(memcmp(a->session_id,b->session_id,a->session_id_length));
	}

Project: openssl

static unsigned long ssl_session_hash(const SSL_SESSION *a)
	{
	unsigned long l;

	l=(unsigned long)
		((unsigned int) a->session_id[0]     )|
		((unsigned int) a->session_id[1]<< 8L)|
		((unsigned long)a->session_id[2]<<16L)|
		((unsigned long)a->session_id[3]<<24L);
	return(l);
	}