spp_srvr.c

#include <stdio.h>
#include "ssl_locl.h"
#include <openssl/buffer.h>
#include <openssl/rand.h>
#include <openssl/objects.h>
#include <openssl/evp.h>
#include <openssl/x509.h>

//#define DEBUG

static const SSL_METHOD *spp_get_server_method(int ver);
static const SSL_METHOD *spp_get_server_method(int ver)
	{
	if (ver == SPP_VERSION)
		return SPP_server_method();
	return NULL;
	}

IMPLEMENT_spp_meth_func(SPP_VERSION, SPP_server_method,
			spp_accept,
			ssl_undefined_function,
			spp_get_server_method)
        
int spp_accept(SSL *s) 	{
    BUF_MEM *buf;
    SPP_PROXY *proxy=NULL;
    unsigned long alg_k,Time=(unsigned long)time(NULL);
    void (*cb)(const SSL *ssl,int type,int val)=NULL;
    int ret= -1,i;
    int new_state,state,skip=0;
    	/* Matteo -- START */	
	struct timeval currTime;      // keep current time  
	struct timeval prevTime;      // keep previous time (to compute time passed)
	struct timeval originTime;    // keep previous time (to compute time passed)
	/* Matteo -- END*/

    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;

    /* init things to blank */
    s->in_handshake++;
    if (!SSL_in_init(s) || SSL_in_before(s)) SSL_clear(s);

    if (s->cert == NULL) {
        SSLerr(SSL_F_SSL3_ACCEPT,SSL_R_NO_CERTIFICATE_SET);
        return(-1);
    }

#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_ACCEPT; */

            case SSL_ST_BEFORE:
            case SSL_ST_ACCEPT:
            case SSL_ST_BEFORE|SSL_ST_ACCEPT:
            case SSL_ST_OK|SSL_ST_ACCEPT:
                                // Initialize timers
				gettimeofday(&currTime, NULL);
				gettimeofday(&prevTime, NULL);
				gettimeofday(&originTime, NULL);

				// Log
				#ifdef DEBUG
				log_time("Before state\n", &currTime, &prevTime, &originTime); 
				#endif
                s->server=1;
                s->proxy = 0;
                s->proxy_id = 2;

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

                if ((s->version>>8) != 6) {
                    SSLerr(SSL_F_SSL3_ACCEPT, ERR_R_INTERNAL_ERROR);
                    return -1;
                }
                s->type=SSL_ST_ACCEPT;

                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;
                }

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

                s->init_num=0;
                s->s3->flags &= ~SSL3_FLAGS_SGC_RESTART_DONE;

                if (s->state != SSL_ST_RENEGOTIATE) {
                    /* Ok, we now need to push on a buffering BIO so that
                     * the output is sent in a way that TCP likes :-)
                     */
                    if (!ssl_init_wbio_buffer(s,1)) { ret= -1; goto end; }
				
                    ssl3_init_finished_mac(s);
                    s->state=SSL3_ST_SR_CLNT_HELLO_A;
                    s->ctx->stats.sess_accept++;
                } else if (!s->s3->send_connection_binding && !(s->options & SSL_OP_ALLOW_UNSAFE_LEGACY_RENEGOTIATION)) {
                    /* Server attempting to renegotiate with
                     * client that doesn't support secure
                     * renegotiation.
                     */
                    SSLerr(SSL_F_SSL3_ACCEPT, SSL_R_UNSAFE_LEGACY_RENEGOTIATION_DISABLED);
                    ssl3_send_alert(s,SSL3_AL_FATAL,SSL_AD_HANDSHAKE_FAILURE);
                    ret = -1;
                    goto end;
                } else {
                    /* s->state == SSL_ST_RENEGOTIATE,
                     * we will just send a HelloRequest */
                    s->ctx->stats.sess_accept_renegotiate++;
                    s->state=SSL3_ST_SW_HELLO_REQ_A;
                }
                break;

            case SSL3_ST_SW_HELLO_REQ_A:
            case SSL3_ST_SW_HELLO_REQ_B:
                s->shutdown=0;
                                #ifdef DEBUG
				log_time("Sending hello request\n", &currTime, &prevTime, &originTime); 
				#endif
                ret=ssl3_send_hello_request(s);
                if (ret <= 0) goto end;
                s->s3->tmp.next_state=SSL3_ST_SW_HELLO_REQ_C;
                s->state=SSL3_ST_SW_FLUSH;
                s->init_num=0;

                ssl3_init_finished_mac(s);
                break;

            case SSL3_ST_SW_HELLO_REQ_C:
                s->state=SSL_ST_OK;
                break;

            case SSL3_ST_SR_CLNT_HELLO_A:
            case SSL3_ST_SR_CLNT_HELLO_B:
            case SSL3_ST_SR_CLNT_HELLO_C:
                s->shutdown=0;
                if (s->rwstate != SSL_X509_LOOKUP) {
                    ret=ssl3_get_client_hello(s);
                                        #ifdef DEBUG
					log_time("Received client hello\n", &currTime, &prevTime, &originTime); 
					#endif
                    if (ret <= 0) goto end;
                    if (!spp_generate_slice_keys(s)) goto end;
                }
/* #ifndef OPENSSL_NO_SRP
                {
                    int al;
                    if ((ret = ssl_check_srp_ext_ClientHello(s,&al))  < 0) {
                        // callback indicates firther work to be done 
                        s->rwstate=SSL_X509_LOOKUP;
                        goto end;
                    }
                    if (ret != SSL_ERROR_NONE) {
                        ssl3_send_alert(s,SSL3_AL_FATAL,al);	
                        // This is not really an error but the only means to
                        //   for a client to detect whether srp is supported. 
                           if (al != TLS1_AD_UNKNOWN_PSK_IDENTITY)
                                SSLerr(SSL_F_SSL3_ACCEPT,SSL_R_CLIENTHELLO_TLSEXT);			
                        ret = SSL_TLSEXT_ERR_ALERT_FATAL;			
                        ret= -1;
                        goto end;	
                    }
                }
#endif */		

                s->renegotiate = 2;
                s->state=SSL3_ST_SW_SRVR_HELLO_A;
                s->init_num=0;
                break;

            case SSL3_ST_SW_SRVR_HELLO_A:
            case SSL3_ST_SW_SRVR_HELLO_B:
                                #ifdef DEBUG
				log_time("Sending server hello\n", &currTime, &prevTime, &originTime); 
				#endif
                ret=ssl3_send_server_hello(s);
                if (ret <= 0) goto end;
#ifndef OPENSSL_NO_TLSEXT
                if (s->hit) {
                    if (s->tlsext_ticket_expected)
                        s->state=SSL3_ST_SW_SESSION_TICKET_A;
                    else
                        s->state=SSL3_ST_SW_CHANGE_A;
                }
#else
                if (s->hit)
                    s->state=SSL3_ST_SW_CHANGE_A;
#endif
                else
                    s->state=SSL3_ST_SW_CERT_A;
                s->init_num=0;
                break;

            case SSL3_ST_SW_CERT_A:
            case SSL3_ST_SW_CERT_B:
                /* Check if it is anon DH or anon ECDH, */
                /* normal PSK or KRB5 or SRP */
                if (!(s->s3->tmp.new_cipher->algorithm_auth & (SSL_aNULL|SSL_aKRB5|SSL_aSRP))
                    && !(s->s3->tmp.new_cipher->algorithm_mkey & SSL_kPSK)) {
                                    #ifdef DEBUG
                                    log_time("Sending certificate\n", &currTime, &prevTime, &originTime); 
                                    #endif
                        ret=ssl3_send_server_certificate(s);
                        if (ret <= 0) goto end;
#ifndef OPENSSL_NO_TLSEXT
                        if (s->tlsext_status_expected)
                                s->state=SSL3_ST_SW_CERT_STATUS_A;
                        else
                                s->state=SSL3_ST_SW_KEY_EXCH_A;
                } else {
                    skip = 1;
                    s->state=SSL3_ST_SW_KEY_EXCH_A;
                    }
#else
                } else
                    skip=1;

                s->state=SSL3_ST_SW_KEY_EXCH_A;
#endif
                s->init_num=0;
                break;

            case SSL3_ST_SW_KEY_EXCH_A:
            case SSL3_ST_SW_KEY_EXCH_B:
                alg_k = s->s3->tmp.new_cipher->algorithm_mkey;

                /* clear this, it may get reset by
                 * send_server_key_exchange */
                if ((s->options & SSL_OP_EPHEMERAL_RSA)
#ifndef OPENSSL_NO_KRB5
                    && !(alg_k & SSL_kKRB5)
#endif /* OPENSSL_NO_KRB5 */
                    )
                    /* option SSL_OP_EPHEMERAL_RSA sends temporary RSA key
                     * even when forbidden by protocol specs
                     * (handshake may fail as clients are not required to
                     * be able to handle this) */
                    s->s3->tmp.use_rsa_tmp=1;
                else
                    s->s3->tmp.use_rsa_tmp=0;


                /* only send if a DH key exchange, fortezza or
                 * RSA but we have a sign only certificate
                 *
                 * PSK: may send PSK identity hints
                 *
                 * For ECC ciphersuites, we send a serverKeyExchange
                 * message only if the cipher suite is either
                 * ECDH-anon or ECDHE. In other cases, the
                 * server certificate contains the server's
                 * public key for key exchange.
                 */
                if (s->s3->tmp.use_rsa_tmp
                /* PSK: send ServerKeyExchange if PSK identity
                 * hint if provided */
#ifndef OPENSSL_NO_PSK
                    || ((alg_k & SSL_kPSK) && s->ctx->psk_identity_hint)
#endif
#ifndef OPENSSL_NO_SRP
                    /* SRP: send ServerKeyExchange */
                    || (alg_k & SSL_kSRP)
#endif
                    || (alg_k & (SSL_kDHr|SSL_kDHd|SSL_kEDH))
                    || (alg_k & SSL_kEECDH)
                    || ((alg_k & SSL_kRSA)
                        && (s->cert->pkeys[SSL_PKEY_RSA_ENC].privatekey == NULL
                            || (SSL_C_IS_EXPORT(s->s3->tmp.new_cipher)
                                && EVP_PKEY_size(s->cert->pkeys[SSL_PKEY_RSA_ENC].privatekey)*8 > SSL_C_EXPORT_PKEYLENGTH(s->s3->tmp.new_cipher)
                                )
                            )
                        )
                    )
                        {
                                        #ifdef DEBUG
                                        log_time("Sending server key exchange\n", &currTime, &prevTime, &originTime); 
                                        #endif
                        ret=ssl3_send_server_key_exchange(s);
                        if (ret <= 0) goto end;
                        }
                else
                        skip=1;

                s->state=SSL3_ST_SW_CERT_REQ_A;
                s->init_num=0;
                break;

            case SSL3_ST_SW_CERT_REQ_A:
            case SSL3_ST_SW_CERT_REQ_B:
                if (/* don't request cert unless asked for it: */
                    !(s->verify_mode & SSL_VERIFY_PEER) ||
                    /* if SSL_VERIFY_CLIENT_ONCE is set,
                     * don't request cert during re-negotiation: */
                    ((s->session->peer != NULL) &&
                     (s->verify_mode & SSL_VERIFY_CLIENT_ONCE)) ||
                    /* never request cert in anonymous ciphersuites
                     * (see section "Certificate request" in SSL 3 drafts
                     * and in RFC 2246): */
                    ((s->s3->tmp.new_cipher->algorithm_auth & SSL_aNULL) &&
                     /* ... except when the application insists on verification
                      * (against the specs, but s3_clnt.c accepts this for SSL 3) */
                     !(s->verify_mode & SSL_VERIFY_FAIL_IF_NO_PEER_CERT)) ||
                     /* never request cert in Kerberos ciphersuites */
                    (s->s3->tmp.new_cipher->algorithm_auth & SSL_aKRB5) ||
                    /* don't request certificate for SRP auth */
                    (s->s3->tmp.new_cipher->algorithm_auth & SSL_aSRP)
                    /* With normal PSK Certificates and
                     * Certificate Requests are omitted */
                    || (s->s3->tmp.new_cipher->algorithm_mkey & SSL_kPSK))
                    {
                    /* no cert request */
                    skip=1;
                    s->s3->tmp.cert_request=0;
                    s->state=SSL3_ST_SW_SRVR_DONE_A;
                    if (s->s3->handshake_buffer)
                            if (!ssl3_digest_cached_records(s))
                                    return -1;
                }
                else
                {
                    s->s3->tmp.cert_request=1;
                                        #ifdef DEBUG
					log_time("Sending certificate request\n", &currTime, &prevTime, &originTime); 
					#endif
                    ret=ssl3_send_certificate_request(s);
                    if (ret <= 0) goto end;
#ifndef NETSCAPE_HANG_BUG
                    s->state=SSL3_ST_SW_SRVR_DONE_A;
#else
                    s->state=SSL3_ST_SW_FLUSH;
                    s->s3->tmp.next_state=SSL3_ST_SR_CERT_A;
#endif
                    s->init_num=0;
                }
                break;

            case SSL3_ST_SW_SRVR_DONE_A:
            case SSL3_ST_SW_SRVR_DONE_B:
                                #ifdef DEBUG
				log_time("Sending server done\n", &currTime, &prevTime, &originTime); 
				#endif
                ret=ssl3_send_server_done(s);
                                #ifdef DEBUG
				log_time("Sent server done\n", &currTime, &prevTime, &originTime); 
				#endif
                if (ret <= 0) goto end;
                s->s3->tmp.next_state=SSL3_ST_SR_CERT_A;
                s->state=SSL3_ST_SW_FLUSH;
                s->init_num=0;
                break;
		
            case SSL3_ST_SW_FLUSH:
                /* This code originally checked to see if
                 * any data was pending using BIO_CTRL_INFO
                 * and then flushed. This caused problems
                 * as documented in PR#1939. The proposed
                 * fix doesn't completely resolve this issue
                 * as buggy implementations of BIO_CTRL_PENDING
                 * still exist. So instead we just flush
                 * unconditionally.
                 */

                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 SSL3_ST_SR_CERT_A:
            case SSL3_ST_SR_CERT_B:
                /* Check for second client hello (MS SGC) */
                                #ifdef DEBUG
				log_time("Checking for second client hello\n", &currTime, &prevTime, &originTime); 
				#endif
                ret = ssl3_check_client_hello(s);
                                #ifdef DEBUG
				log_time("Checked for second client hello\n", &currTime, &prevTime, &originTime); 
				#endif
                if (ret <= 0)
                    goto end;
                if (ret == 2)
                    s->state = SSL3_ST_SR_CLNT_HELLO_C;
                else {
                    if (s->s3->tmp.cert_request) {
                                                #ifdef DEBUG
						log_time("Receiving required client certificate\n", &currTime, &prevTime, &originTime); 
						#endif
                        ret=ssl3_get_client_certificate(s);
                        if (ret <= 0) goto end;
                    }
                    proxy = spp_get_next_proxy(s, proxy, 0);
                    if (proxy == NULL) {
                        s->state=SSL3_ST_SR_KEY_EXCH_A;
                    } else {
                        s->state=SPP_ST_CR_PRXY_CERT_A;
                    }
                    s->init_num=0;
                }
                break;
                
            case SPP_ST_CR_PRXY_CERT_A:
            case SPP_ST_CR_PRXY_CERT_B:
                                #ifdef DEBUG
				log_time("Waiting for proxy certificate\n", &currTime, &prevTime, &originTime); 
				#endif
                ret=spp_get_proxy_certificate(s, proxy);
                                #ifdef DEBUG
				log_time("Received proxy certificate\n", &currTime, &prevTime, &originTime); 
				#endif
                if (ret <= 0) goto end;
                s->state=SPP_ST_CR_PRXY_KEY_EXCH_A;
                s->init_num=0;
                break;
                
            /* Receive the hello messages from the proxies now. */
            case SPP_ST_CR_PRXY_KEY_EXCH_A:
            case SPP_ST_CR_PRXY_KEY_EXCH_B:
                ret=spp_get_proxy_key_exchange(s, proxy);
                                #ifdef DEBUG
				log_time("Received proxy key exchange\n", &currTime, &prevTime, &originTime); 
				#endif
                if (ret <= 0) goto end;
                s->state=SPP_ST_CR_PRXY_DONE_A;
                s->init_num=0; 
                break;
                
            case SPP_ST_CR_PRXY_DONE_A:
            case SPP_ST_CR_PRXY_DONE_B:
                ret=spp_get_proxy_done(s, proxy);
                                #ifdef DEBUG
				log_time("Received proxy done\n", &currTime, &prevTime, &originTime); 
				#endif
                if (ret <= 0) goto end;
                                
                proxy = spp_get_next_proxy(s, proxy, 0);
                if (proxy == NULL) {
                    s->state=SSL3_ST_SR_KEY_EXCH_A;
                } else {
                    /* Go back and read the next proxy */
                    s->state=SPP_ST_CR_PRXY_CERT_A;
                }
                s->init_num=0;                
                break;
                
            case SSL3_ST_SR_KEY_EXCH_A:
            case SSL3_ST_SR_KEY_EXCH_B:
                                #ifdef DEBUG
				log_time("Receiving client key exchange\n", &currTime, &prevTime, &originTime); 
				#endif
                ret=ssl3_get_client_key_exchange(s);
                                #ifdef DEBUG
				log_time("Received client key exchange\n", &currTime, &prevTime, &originTime); 
				#endif
                if (ret <= 0)
                    goto end;
                if (ret == 2)
                    {
                    /* For the ECDH ciphersuites when
                     * the client sends its ECDH pub key in
                     * a certificate, the CertificateVerify
                     * message is not sent.
                     * Also for GOST ciphersuites when
                     * the client uses its key from the certificate
                     * for key exchange.
                     */
                    s->state = SPP_ST_CR_PRXY_MAT_A;
                    s->init_num = 0;
                    }
                else if (TLS1_get_version(s) >= TLS1_2_VERSION)
                    {
                    s->state=SPP_ST_CR_PRXY_MAT_A;
                    s->init_num=0;
                    if (!s->session->peer)
                            break;
                    /* For TLS v1.2 freeze the handshake buffer
                     * at this point and digest cached records.
                     */
                    if (!s->s3->handshake_buffer)
                            {
                            SSLerr(SSL_F_SSL3_ACCEPT,ERR_R_INTERNAL_ERROR);
                            return -1;
                            }
                    s->s3->flags |= TLS1_FLAGS_KEEP_HANDSHAKE;
                    if (!ssl3_digest_cached_records(s))
                            return -1;
                    }
                else
                    {
                    int offset=0;
                    int dgst_num;

                    s->state=SPP_ST_CR_PRXY_MAT_A;
                    s->init_num=0;

                    /* We need to get hashes here so if there is
                     * a client cert, it can be verified
                     * FIXME - digest processing for CertificateVerify
                     * should be generalized. But it is next step
                     */
                    if (s->s3->handshake_buffer)
                            if (!ssl3_digest_cached_records(s))
                                    return -1;
                    for (dgst_num=0; dgst_num<SSL_MAX_DIGEST;dgst_num++)	
                            if (s->s3->handshake_dgst[dgst_num]) 
                                    {
                                    int dgst_size;

                                    s->method->ssl3_enc->cert_verify_mac(s,EVP_MD_CTX_type(s->s3->handshake_dgst[dgst_num]),&(s->s3->tmp.cert_verify_md[offset]));
                                    dgst_size=EVP_MD_CTX_size(s->s3->handshake_dgst[dgst_num]);
                                    if (dgst_size < 0)
                                            {
                                            ret = -1;
                                            goto end;
                                            }
                                    offset+=dgst_size;
                                    }		
                    }
                break;
                        
            /* Send the proxy key material. */
            case SPP_ST_CW_PRXY_MAT_A:
            case SPP_ST_CW_PRXY_MAT_B:
                                #ifdef DEBUG
				log_time("Sending proxy key material\n", &currTime, &prevTime, &originTime); 
				#endif
                for (i = 0; i < s->proxies_len; i++) {
                    ret=spp_send_proxy_key_material(s, s->proxies[i]);
                    if (ret <= 0) goto end;
                    s->state = SPP_ST_CW_PRXY_MAT_A;
                    s->init_num=0;
                }
                ret=spp_send_end_key_material_server(s);
                
#ifndef OPENSSL_NO_TLSEXT
                if (s->tlsext_ticket_expected)
                    s->state=SSL3_ST_SW_SESSION_TICKET_A;
                else
#endif
                    s->state=SSL3_ST_SW_CHANGE_A;
                //s->s3->change_cipher_spec=0;

                s->init_num=0;
                break;
                
            case SPP_ST_CR_PRXY_MAT_A:
            case SPP_ST_CR_PRXY_MAT_B:
                                #ifdef DEBUG
				log_time("Receiving proxy key material\n", &currTime, &prevTime, &originTime); 
				#endif
                for (i = s->proxies_len-1; i >= 0; i--) {
                    ret=spp_get_proxy_key_material(s, s->proxies[i]);
                    if (ret <= 0) goto end;
                    s->state = SPP_ST_CR_PRXY_MAT_A;
                    s->init_num=0;
                }
                ret=spp_get_end_key_material_server(s);
                if (ret <= 0) goto end;
#if defined(OPENSSL_NO_TLSEXT) || defined(OPENSSL_NO_NEXTPROTONEG)
                s->state=SSL3_ST_SR_FINISHED_A;
#else
                if (s->s3->next_proto_neg_seen)
                    s->state=SSL3_ST_SR_NEXT_PROTO_A;
                else
                    s->state=SSL3_ST_SR_FINISHED_A;
#endif
                s->s3->change_cipher_spec=0;

                s->init_num=0;
                break;

            case SSL3_ST_SR_CERT_VRFY_A:
            case SSL3_ST_SR_CERT_VRFY_B:
                                #ifdef DEBUG
				log_time("Receiving cert verify\n", &currTime, &prevTime, &originTime); 
				#endif
                s->s3->flags |= SSL3_FLAGS_CCS_OK;
                /* we should decide if we expected this one */
                ret=ssl3_get_cert_verify(s);
                if (ret <= 0) goto end;

#if defined(OPENSSL_NO_TLSEXT) || defined(OPENSSL_NO_NEXTPROTONEG)
                s->state=SSL3_ST_SR_FINISHED_A;
#else
                if (s->s3->next_proto_neg_seen)
                    s->state=SSL3_ST_SR_NEXT_PROTO_A;
                else
                    s->state=SSL3_ST_SR_FINISHED_A;
#endif
                s->init_num=0;
                break;

#if !defined(OPENSSL_NO_TLSEXT) && !defined(OPENSSL_NO_NEXTPROTONEG)
            case SSL3_ST_SR_NEXT_PROTO_A:
            case SSL3_ST_SR_NEXT_PROTO_B:
                        #ifdef DEBUG
			log_time("Receiving next proto\n", &currTime, &prevTime, &originTime); 			
			#endif
                ret=ssl3_get_next_proto(s);
                if (ret <= 0) goto end;
                s->init_num = 0;
                s->state=SSL3_ST_SR_FINISHED_A;
                break;
#endif

            case SSL3_ST_SR_FINISHED_A:
            case SSL3_ST_SR_FINISHED_B:
                        #ifdef DEBUG
			log_time("Receiving client finished\n", &currTime, &prevTime, &originTime); 			
			#endif
                    s->s3->flags |= SSL3_FLAGS_CCS_OK;
                    ret=ssl3_get_finished(s,SSL3_ST_SR_FINISHED_A,
                        SSL3_ST_SR_FINISHED_B);
                    if (ret <= 0) goto end;
                    if (s->hit)
                        s->state=SSL_ST_OK;
                    s->state=SPP_ST_CW_PRXY_MAT_A;
                    s->init_num=0;

                    break;

#ifndef OPENSSL_NO_TLSEXT
		case SSL3_ST_SW_SESSION_TICKET_A:
		case SSL3_ST_SW_SESSION_TICKET_B:
                                #ifdef DEBUG
				log_time("Sending session ticket\n", &currTime, &prevTime, &originTime); 
				#endif
			ret=ssl3_send_newsession_ticket(s);
			if (ret <= 0) goto end;
			s->state=SSL3_ST_SW_CHANGE_A;
			s->init_num=0;
			break;

		case SSL3_ST_SW_CERT_STATUS_A:
		case SSL3_ST_SW_CERT_STATUS_B:
                                #ifdef DEBUG
				log_time("Sending cert status\n", &currTime, &prevTime, &originTime); 
				#endif
			ret=ssl3_send_cert_status(s);
			if (ret <= 0) goto end;
			s->state=SSL3_ST_SW_KEY_EXCH_A;
			s->init_num=0;
			break;

#endif

		case SSL3_ST_SW_CHANGE_A:
		case SSL3_ST_SW_CHANGE_B:
			s->session->cipher=s->s3->tmp.new_cipher;
			if (!s->method->ssl3_enc->setup_key_block(s))
				{ ret= -1; goto end; }

                                    #ifdef DEBUG
                                    log_time("Sending change cipher state\n", &currTime, &prevTime, &originTime); 			
                                    #endif
			ret=ssl3_send_change_cipher_spec(s,
				SSL3_ST_SW_CHANGE_A,SSL3_ST_SW_CHANGE_B);

			if (ret <= 0) goto end;
			s->state=SSL3_ST_SW_FINISHED_A;
			s->init_num=0;

			if (!s->method->ssl3_enc->change_cipher_state(s,
				SSL3_CHANGE_CIPHER_SERVER_WRITE))
				{
				ret= -1;
				goto end;
				}

			break;

		case SSL3_ST_SW_FINISHED_A:
		case SSL3_ST_SW_FINISHED_B:
                                #ifdef DEBUG
				log_time("Sending server finished\n", &currTime, &prevTime, &originTime); 
				#endif
			ret=ssl3_send_finished(s,
				SSL3_ST_SW_FINISHED_A,SSL3_ST_SW_FINISHED_B,
				s->method->ssl3_enc->server_finished_label,
				s->method->ssl3_enc->server_finished_label_len);
			if (ret <= 0) goto end;
			s->state=SSL3_ST_SW_FLUSH;
			if (s->hit)
				{
#if defined(OPENSSL_NO_TLSEXT) || defined(OPENSSL_NO_NEXTPROTONEG)
				s->s3->tmp.next_state=SSL3_ST_SR_FINISHED_A;
#else
				if (s->s3->next_proto_neg_seen)
					{
					s->s3->flags |= SSL3_FLAGS_CCS_OK;
					s->s3->tmp.next_state=SSL3_ST_SR_NEXT_PROTO_A;
					}
				else
					s->s3->tmp.next_state=SSL3_ST_SR_FINISHED_A;
#endif
				}
			else
				s->s3->tmp.next_state=SSL_ST_OK;
			s->init_num=0;
                                
                        // Store the values for end-to-end integrity checking
                        if (spp_init_integrity_st(s) <= 0)
                            goto end;
                        /* Setup the slices now that we have the necessary state. */
                        ret = spp_init_slices_st(s, SSL3_CHANGE_CIPHER_SERVER_WRITE);
                        if (ret <= 0) goto end;
                        ret = spp_init_slices_st(s, SSL3_CHANGE_CIPHER_SERVER_READ);
                        if (ret <= 0) goto end;
			break;

		case SSL_ST_OK:
                                #ifdef DEBUG
				log_time("Handshake OK\n", &currTime, &prevTime, &originTime); 
				#endif
			/* clean a few things up */
			ssl3_cleanup_key_block(s);

			BUF_MEM_free(s->init_buf);
			s->init_buf=NULL;

			/* remove buffering on output */
			ssl_free_wbio_buffer(s);

			s->init_num=0;

			if (s->renegotiate == 2) /* skipped if we just sent a HelloRequest */
				{
				s->renegotiate=0;
				s->new_session=0;
				
				ssl_update_cache(s,SSL_SESS_CACHE_SERVER);
				
				s->ctx->stats.sess_accept_good++;
				/* s->server=1; */
				s->handshake_func=spp_accept;

				if (cb != NULL) cb(s,SSL_CB_HANDSHAKE_DONE,1);
				}
			
			ret = 1;
			goto end;
			/* break; */

		default:
			SSLerr(SSL_F_SSL3_ACCEPT,SSL_R_UNKNOWN_STATE);
			ret= -1;
			goto end;
			/* break; */
			}
		
		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_ACCEPT_LOOP,1);
				s->state=new_state;
				}
			}
		skip=0;
		}
end:
                #ifdef DEBUG
		log_time("Handshake end\n", &currTime, &prevTime, &originTime); 
		#endif
	/* BIO_flush(s->wbio); */

	s->in_handshake--;
	if (cb != NULL)
		cb(s,SSL_CB_ACCEPT_EXIT,ret);
	return(ret);
	}