- {
- int ret = SSL_ERROR_NONE;
-
- *al = SSL_AD_UNRECOGNIZED_NAME;
-
- if ((s->s3->tmp.new_cipher->algorithm_mkey & SSL_kSRP) &&
- (s->srp_ctx.TLS_ext_srp_username_callback != NULL))
- {
- if(s->srp_ctx.login == NULL)
- {
- /* RFC 5054 says SHOULD reject,
- we do so if There is no srp login name */
- ret = SSL3_AL_FATAL;
- *al = SSL_AD_UNKNOWN_PSK_IDENTITY;
- }
- else
- {
- ret = SSL_srp_server_param_with_username(s,al);
- }
- }
- return ret;
- }
-#endif
-
-IMPLEMENT_ssl3_meth_func(SSLv3_server_method,
- ssl3_accept,
- ssl_undefined_function,
- ssl3_get_server_method)
-
-int ssl3_accept(SSL *s)
- {
- BUF_MEM *buf;
- unsigned long alg_k,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;
-
- /* 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:
-
- s->server=1;
- if (cb != NULL) cb(s,SSL_CB_HANDSHAKE_START,1);
-
- if ((s->version>>8) != 3)
- {
- SSLerr(SSL_F_SSL3_ACCEPT, ERR_R_INTERNAL_ERROR);
- return -1;
- }
-
- if (!ssl_security(s, SSL_SECOP_VERSION, 0,
- s->version, NULL))
- {
- SSLerr(SSL_F_SSL3_ACCEPT, SSL_R_VERSION_TOO_LOW);
- 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;
- s->s3->flags &= ~TLS1_FLAGS_SKIP_CERT_VERIFY;
-
- 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;
- 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:
-
- ret=ssl3_get_client_hello(s);
- if (ret <= 0) goto end;
-#ifndef OPENSSL_NO_SRP
- s->state = SSL3_ST_SR_CLNT_HELLO_D;
- case SSL3_ST_SR_CLNT_HELLO_D:
- {
- 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:
- 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))
- {
- 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_kDHE)
- || (alg_k & SSL_kECDHE)
- || ((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)
- )
- )
- )
- )
- {
- 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;
- 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:
- ret=ssl3_send_server_done(s);
- 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) */
- ret = ssl3_check_client_hello(s);
- if (ret <= 0)
- goto end;
- if (ret == 2)
- s->state = SSL3_ST_SR_CLNT_HELLO_C;
- else {
- if (s->s3->tmp.cert_request)
- {
- ret=ssl3_get_client_certificate(s);
- if (ret <= 0) goto end;
- }
- s->init_num=0;
- s->state=SSL3_ST_SR_KEY_EXCH_A;
- }
- break;
-
- case SSL3_ST_SR_KEY_EXCH_A:
- case SSL3_ST_SR_KEY_EXCH_B:
- ret=ssl3_get_client_key_exchange(s);
- 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.
- */
-#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;
- }
- else if (SSL_USE_SIGALGS(s))
- {
- s->state=SSL3_ST_SR_CERT_VRFY_A;
- s->init_num=0;
- if (!s->session->peer)
- break;
- /* For sigalgs 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=SSL3_ST_SR_CERT_VRFY_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;
-
- case SSL3_ST_SR_CERT_VRFY_A:
- case SSL3_ST_SR_CERT_VRFY_B:
-
- 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:
- ret=ssl3_get_next_proto(s);
- if (ret <= 0) goto end;
- s->init_num = 0;
- s->state=SSL3_ST_SR_FINISHED_A;
- break;