static int dtls1_buffer_record(SSL *s, record_pqueue *q,
unsigned char *priority);
static int dtls1_process_record(SSL *s);
-static void dtls1_clear_timeouts(SSL *s);
/* copy buffered record into SSL structure */
static int
item->data = rdata;
+#ifndef OPENSSL_NO_SCTP
+ /* Store bio_dgram_sctp_rcvinfo struct */
+ if (BIO_dgram_is_sctp(SSL_get_rbio(s)) &&
+ (s->state == SSL3_ST_SR_FINISHED_A || s->state == SSL3_ST_CR_FINISHED_A)) {
+ BIO_ctrl(SSL_get_rbio(s), BIO_CTRL_DGRAM_SCTP_GET_RCVINFO, sizeof(rdata->recordinfo), &rdata->recordinfo);
+ }
+#endif
+
/* insert should not fail, since duplicates are dropped */
if (pqueue_insert(queue->q, item) == NULL)
{
SSL3_RECORD *rr;
unsigned int mac_size;
unsigned char md[EVP_MAX_MD_SIZE];
+ int decryption_failed_or_bad_record_mac = 0;
+ unsigned char *mac = NULL;
rr= &(s->s3->rrec);
enc_err = s->method->ssl3_enc->enc(s,0);
if (enc_err <= 0)
{
- if (enc_err == 0)
- /* SSLerr() and ssl3_send_alert() have been called */
- goto err;
-
- /* otherwise enc_err == -1 */
- goto err;
+ /* To minimize information leaked via timing, we will always
+ * perform all computations before discarding the message.
+ */
+ decryption_failed_or_bad_record_mac = 1;
}
#ifdef TLS_DEBUG
SSLerr(SSL_F_DTLS1_PROCESS_RECORD,SSL_R_PRE_MAC_LENGTH_TOO_LONG);
goto f_err;
#else
- goto err;
+ decryption_failed_or_bad_record_mac = 1;
#endif
}
/* check the MAC for rr->input (it's in mac_size bytes at the tail) */
- if (rr->length < mac_size)
+ if (rr->length >= mac_size)
{
-#if 0 /* OK only for stream ciphers */
- al=SSL_AD_DECODE_ERROR;
- SSLerr(SSL_F_DTLS1_PROCESS_RECORD,SSL_R_LENGTH_TOO_SHORT);
- goto f_err;
-#else
- goto err;
-#endif
+ rr->length -= mac_size;
+ mac = &rr->data[rr->length];
}
- rr->length-=mac_size;
+ else
+ rr->length = 0;
i=s->method->ssl3_enc->mac(s,md,0);
- if (i < 0 || memcmp(md,&(rr->data[rr->length]),mac_size) != 0)
+ if (i < 0 || mac == NULL || memcmp(md, mac, mac_size) != 0)
{
- goto err;
+ decryption_failed_or_bad_record_mac = 1;
}
}
+ if (decryption_failed_or_bad_record_mac)
+ {
+ /* decryption failed, silently discard message */
+ rr->length = 0;
+ s->packet_length = 0;
+ goto err;
+ }
+
/* r->length is now just compressed */
if (s->expand != NULL)
{
goto again; /* get another record */
}
- /* Check whether this is a repeat, or aged record.
- * Don't check if we're listening and this message is
- * a ClientHello. They can look as if they're replayed,
- * since they arrive from different connections and
- * would be dropped unnecessarily.
- */
- if (!(s->d1->listen && rr->type == SSL3_RT_HANDSHAKE &&
- *p == SSL3_MT_CLIENT_HELLO) &&
- !dtls1_record_replay_check(s, bitmap))
- {
- rr->length = 0;
- s->packet_length=0; /* dump this record */
- goto again; /* get another record */
- }
+#ifndef OPENSSL_NO_SCTP
+ /* Only do replay check if no SCTP bio */
+ if (!BIO_dgram_is_sctp(SSL_get_rbio(s)))
+ {
+#endif
+ /* Check whether this is a repeat, or aged record.
+ * Don't check if we're listening and this message is
+ * a ClientHello. They can look as if they're replayed,
+ * since they arrive from different connections and
+ * would be dropped unnecessarily.
+ */
+ if (!(s->d1->listen && rr->type == SSL3_RT_HANDSHAKE &&
+ *p == SSL3_MT_CLIENT_HELLO) &&
+ !dtls1_record_replay_check(s, bitmap))
+ {
+ rr->length = 0;
+ s->packet_length=0; /* dump this record */
+ goto again; /* get another record */
+ }
+#ifndef OPENSSL_NO_SCTP
+ }
+#endif
/* just read a 0 length packet */
if (rr->length == 0) goto again;
/* If this record is from the next epoch (either HM or ALERT),
* and a handshake is currently in progress, buffer it since it
- * cannot be processed at this time. */
+ * cannot be processed at this time. However, do not buffer
+ * anything while listening.
+ */
if (is_next_epoch)
{
- if (SSL_in_init(s) || s->in_handshake)
+ if ((SSL_in_init(s) || s->in_handshake) && !s->d1->listen)
{
dtls1_buffer_record(s, &(s->d1->unprocessed_rcds), rr->seq_num);
}
goto again; /* get another record */
}
- dtls1_clear_timeouts(s); /* done waiting */
return(1);
}
/* Now s->d1->handshake_fragment_len == 0 if type == SSL3_RT_HANDSHAKE. */
+#ifndef OPENSSL_NO_SCTP
+ /* Continue handshake if it had to be interrupted to read
+ * app data with SCTP.
+ */
+ if ((!s->in_handshake && SSL_in_init(s)) ||
+ (BIO_dgram_is_sctp(SSL_get_rbio(s)) &&
+ (s->state == DTLS1_SCTP_ST_SR_READ_SOCK || s->state == DTLS1_SCTP_ST_CR_READ_SOCK) &&
+ s->s3->in_read_app_data != 2))
+#else
if (!s->in_handshake && SSL_in_init(s))
+#endif
{
/* type == SSL3_RT_APPLICATION_DATA */
i=s->handshake_func(s);
item = pqueue_pop(s->d1->buffered_app_data.q);
if (item)
{
+#ifndef OPENSSL_NO_SCTP
+ /* Restore bio_dgram_sctp_rcvinfo struct */
+ if (BIO_dgram_is_sctp(SSL_get_rbio(s)))
+ {
+ DTLS1_RECORD_DATA *rdata = (DTLS1_RECORD_DATA *) item->data;
+ BIO_ctrl(SSL_get_rbio(s), BIO_CTRL_DGRAM_SCTP_SET_RCVINFO, sizeof(rdata->recordinfo), &rdata->recordinfo);
+ }
+#endif
+
dtls1_copy_record(s, item);
OPENSSL_free(item->data);
rr->off=0;
}
}
+
+#ifndef OPENSSL_NO_SCTP
+ /* We were about to renegotiate but had to read
+ * belated application data first, so retry.
+ */
+ if (BIO_dgram_is_sctp(SSL_get_rbio(s)) &&
+ rr->type == SSL3_RT_APPLICATION_DATA &&
+ (s->state == DTLS1_SCTP_ST_SR_READ_SOCK || s->state == DTLS1_SCTP_ST_CR_READ_SOCK))
+ {
+ s->rwstate=SSL_READING;
+ BIO_clear_retry_flags(SSL_get_rbio(s));
+ BIO_set_retry_read(SSL_get_rbio(s));
+ }
+
+ /* We might had to delay a close_notify alert because
+ * of reordered app data. If there was an alert and there
+ * is no message to read anymore, finally set shutdown.
+ */
+ if (BIO_dgram_is_sctp(SSL_get_rbio(s)) &&
+ s->d1->shutdown_received && !BIO_dgram_sctp_msg_waiting(SSL_get_rbio(s)))
+ {
+ s->shutdown |= SSL_RECEIVED_SHUTDOWN;
+ return(0);
+ }
+#endif
return(n);
}
dest = s->d1->alert_fragment;
dest_len = &s->d1->alert_fragment_len;
}
+#ifndef OPENSSL_NO_HEARTBEATS
+ else if (rr->type == TLS1_RT_HEARTBEAT)
+ {
+ dtls1_process_heartbeat(s);
+
+ /* Exit and notify application to read again */
+ rr->length = 0;
+ s->rwstate=SSL_READING;
+ BIO_clear_retry_flags(SSL_get_rbio(s));
+ BIO_set_retry_read(SSL_get_rbio(s));
+ return(-1);
+ }
+#endif
/* else it's a CCS message, or application data or wrong */
else if (rr->type != SSL3_RT_CHANGE_CIPHER_SPEC)
{
!(s->s3->flags & SSL3_FLAGS_NO_RENEGOTIATE_CIPHERS) &&
!s->s3->renegotiate)
{
+ s->new_session = 1;
ssl3_renegotiate(s);
if (ssl3_renegotiate_check(s))
{
s->s3->warn_alert = alert_descr;
if (alert_descr == SSL_AD_CLOSE_NOTIFY)
{
+#ifndef OPENSSL_NO_SCTP
+ /* With SCTP and streams the socket may deliver app data
+ * after a close_notify alert. We have to check this
+ * first so that nothing gets discarded.
+ */
+ if (BIO_dgram_is_sctp(SSL_get_rbio(s)) &&
+ BIO_dgram_sctp_msg_waiting(SSL_get_rbio(s)))
+ {
+ s->d1->shutdown_received = 1;
+ s->rwstate=SSL_READING;
+ BIO_clear_retry_flags(SSL_get_rbio(s));
+ BIO_set_retry_read(SSL_get_rbio(s));
+ return -1;
+ }
+#endif
s->shutdown |= SSL_RECEIVED_SHUTDOWN;
return(0);
}
if (s->version == DTLS1_BAD_VER)
s->d1->handshake_read_seq++;
+#ifndef OPENSSL_NO_SCTP
+ /* Remember that a CCS has been received,
+ * so that an old key of SCTP-Auth can be
+ * deleted when a CCS is sent. Will be ignored
+ * if no SCTP is used
+ */
+ BIO_ctrl(SSL_get_wbio(s), BIO_CTRL_DGRAM_SCTP_AUTH_CCS_RCVD, 1, NULL);
+#endif
+
goto start;
}
*/
if (msg_hdr.type == SSL3_MT_FINISHED)
{
+ if (dtls1_check_timeout_num(s) < 0)
+ return -1;
+
dtls1_retransmit_buffered_messages(s);
rr->length = 0;
goto start;
#else
s->state = s->server ? SSL_ST_ACCEPT : SSL_ST_CONNECT;
#endif
+ s->renegotiate=1;
s->new_session=1;
}
i=s->handshake_func(s);
{
int i;
- if (SSL_in_init(s) && !s->in_handshake)
+#ifndef OPENSSL_NO_SCTP
+ /* Check if we have to continue an interrupted handshake
+ * for reading belated app data with SCTP.
+ */
+ if ((SSL_in_init(s) && !s->in_handshake) ||
+ (BIO_dgram_is_sctp(SSL_get_wbio(s)) &&
+ (s->state == DTLS1_SCTP_ST_SR_READ_SOCK || s->state == DTLS1_SCTP_ST_CR_READ_SOCK)))
+#else
+ if (SSL_in_init(s) && !s->in_handshake)
+#endif
{
i=s->handshake_func(s);
if (i < 0) return(i);
memset(seq, 0x00, seq_bytes);
}
-
-
-static void
-dtls1_clear_timeouts(SSL *s)
- {
- memset(&(s->d1->timeout), 0x00, sizeof(struct dtls1_timeout_st));
- }
projects / openssl.git / blobdiff