/*
- * DTLS implementation written by Nagendra Modadugu
- * (nagendra@cs.stanford.edu) for the OpenSSL project 2005.
- */
-/* ====================================================================
- * Copyright (c) 1998-2005 The OpenSSL Project. All rights reserved.
- *
- * Redistribution and use in source and binary forms, with or without
- * modification, are permitted provided that the following conditions
- * are met:
- *
- * 1. Redistributions of source code must retain the above copyright
- * notice, this list of conditions and the following disclaimer.
- *
- * 2. Redistributions in binary form must reproduce the above copyright
- * notice, this list of conditions and the following disclaimer in
- * the documentation and/or other materials provided with the
- * distribution.
- *
- * 3. All advertising materials mentioning features or use of this
- * software must display the following acknowledgment:
- * "This product includes software developed by the OpenSSL Project
- * for use in the OpenSSL Toolkit. (http://www.openssl.org/)"
- *
- * 4. The names "OpenSSL Toolkit" and "OpenSSL Project" must not be used to
- * endorse or promote products derived from this software without
- * prior written permission. For written permission, please contact
- * openssl-core@openssl.org.
- *
- * 5. Products derived from this software may not be called "OpenSSL"
- * nor may "OpenSSL" appear in their names without prior written
- * permission of the OpenSSL Project.
- *
- * 6. Redistributions of any form whatsoever must retain the following
- * acknowledgment:
- * "This product includes software developed by the OpenSSL Project
- * for use in the OpenSSL Toolkit (http://www.openssl.org/)"
- *
- * THIS SOFTWARE IS PROVIDED BY THE OpenSSL PROJECT ``AS IS'' AND ANY
- * EXPRESSED OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
- * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
- * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE OpenSSL PROJECT OR
- * ITS CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
- * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
- * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
- * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
- * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
- * STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
- * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED
- * OF THE POSSIBILITY OF SUCH DAMAGE.
- * ====================================================================
- *
- * This product includes cryptographic software written by Eric Young
- * (eay@cryptsoft.com). This product includes software written by Tim
- * Hudson (tjh@cryptsoft.com).
+ * Copyright 2005-2016 The OpenSSL Project Authors. All Rights Reserved.
*
- */
-/* Copyright (C) 1995-1998 Eric Young (eay@cryptsoft.com)
- * All rights reserved.
- *
- * This package is an SSL implementation written
- * by Eric Young (eay@cryptsoft.com).
- * The implementation was written so as to conform with Netscapes SSL.
- *
- * This library is free for commercial and non-commercial use as long as
- * the following conditions are aheared to. The following conditions
- * apply to all code found in this distribution, be it the RC4, RSA,
- * lhash, DES, etc., code; not just the SSL code. The SSL documentation
- * included with this distribution is covered by the same copyright terms
- * except that the holder is Tim Hudson (tjh@cryptsoft.com).
- *
- * Copyright remains Eric Young's, and as such any Copyright notices in
- * the code are not to be removed.
- * If this package is used in a product, Eric Young should be given attribution
- * as the author of the parts of the library used.
- * This can be in the form of a textual message at program startup or
- * in documentation (online or textual) provided with the package.
- *
- * Redistribution and use in source and binary forms, with or without
- * modification, are permitted provided that the following conditions
- * are met:
- * 1. Redistributions of source code must retain the copyright
- * notice, this list of conditions and the following disclaimer.
- * 2. Redistributions in binary form must reproduce the above copyright
- * notice, this list of conditions and the following disclaimer in the
- * documentation and/or other materials provided with the distribution.
- * 3. All advertising materials mentioning features or use of this software
- * must display the following acknowledgement:
- * "This product includes cryptographic software written by
- * Eric Young (eay@cryptsoft.com)"
- * The word 'cryptographic' can be left out if the rouines from the library
- * being used are not cryptographic related :-).
- * 4. If you include any Windows specific code (or a derivative thereof) from
- * the apps directory (application code) you must include an acknowledgement:
- * "This product includes software written by Tim Hudson (tjh@cryptsoft.com)"
- *
- * THIS SOFTWARE IS PROVIDED BY ERIC YOUNG ``AS IS'' AND
- * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
- * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
- * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
- * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
- * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
- * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
- * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
- * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
- * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
- * SUCH DAMAGE.
- *
- * The licence and distribution terms for any publically available version or
- * derivative of this code cannot be changed. i.e. this code cannot simply be
- * copied and put under another distribution licence
- * [including the GNU Public Licence.]
+ * Licensed under the OpenSSL license (the "License"). You may not use
+ * this file except in compliance with the License. You can obtain a copy
+ * in the file LICENSE in the source distribution or at
+ * https://www.openssl.org/source/license.html
*/
#include <stdio.h>
#include "../ssl_locl.h"
#include <openssl/evp.h>
#include <openssl/buffer.h>
-#include <openssl/rand.h>
#include "record_locl.h"
int DTLS_RECORD_LAYER_new(RECORD_LAYER *rl)
{
DTLS_RECORD_LAYER *d;
-
+
if ((d = OPENSSL_malloc(sizeof(*d))) == NULL)
return (0);
-
rl->d = d;
d->unprocessed_rcds.q = pqueue_new();
pqueue *buffered_app_data;
d = rl->d;
-
+
while ((item = pqueue_pop(d->unprocessed_rcds.q)) != NULL) {
rdata = (DTLS1_RECORD_DATA *)item->data;
OPENSSL_free(rdata->rbuf.buf);
{
if (e == rl->d->w_epoch - 1) {
memcpy(rl->d->curr_write_sequence,
- rl->write_sequence,
- sizeof(rl->write_sequence));
+ rl->write_sequence, sizeof(rl->write_sequence));
memcpy(rl->write_sequence,
- rl->d->last_write_sequence,
- sizeof(rl->write_sequence));
+ rl->d->last_write_sequence, sizeof(rl->write_sequence));
} else if (e == rl->d->w_epoch + 1) {
memcpy(rl->d->last_write_sequence,
- rl->write_sequence,
- sizeof(unsigned char[8]));
+ rl->write_sequence, sizeof(unsigned char[8]));
memcpy(rl->write_sequence,
- rl->d->curr_write_sequence,
- sizeof(rl->write_sequence));
+ rl->d->curr_write_sequence, sizeof(rl->write_sequence));
}
rl->d->w_epoch = e;
}
memcpy(rl->write_sequence, rl->read_sequence, sizeof(rl->write_sequence));
}
-
void DTLS_RECORD_LAYER_set_write_sequence(RECORD_LAYER *rl, unsigned char *seq)
{
memcpy(rl->write_sequence, seq, SEQ_NUM_SIZE);
}
-static int have_handshake_fragment(SSL *s, int type, unsigned char *buf,
- int len);
+static size_t have_handshake_fragment(SSL *s, int type, unsigned char *buf,
+ size_t len);
/* copy buffered record into SSL structure */
static int dtls1_copy_record(SSL *s, pitem *item)
dtls1_retrieve_buffered_record((s), \
&((s)->rlayer.d->unprocessed_rcds))
-
int dtls1_process_buffered_records(SSL *s)
{
pitem *item;
+ SSL3_BUFFER *rb;
+ SSL3_RECORD *rr;
+ DTLS1_BITMAP *bitmap;
+ unsigned int is_next_epoch;
+ int replayok = 1;
item = pqueue_peek(s->rlayer.d->unprocessed_rcds.q);
if (item) {
/* Check if epoch is current. */
if (s->rlayer.d->unprocessed_rcds.epoch != s->rlayer.d->r_epoch)
- return (1); /* Nothing to do. */
+ return 1; /* Nothing to do. */
+
+ rr = RECORD_LAYER_get_rrec(&s->rlayer);
+
+ rb = RECORD_LAYER_get_rbuf(&s->rlayer);
+
+ if (SSL3_BUFFER_get_left(rb) > 0) {
+ /*
+ * We've still got data from the current packet to read. There could
+ * be a record from the new epoch in it - so don't overwrite it
+ * with the unprocessed records yet (we'll do it when we've
+ * finished reading the current packet).
+ */
+ return 1;
+ }
/* Process all the records. */
while (pqueue_peek(s->rlayer.d->unprocessed_rcds.q)) {
dtls1_get_unprocessed_record(s);
- if (!dtls1_process_record(s))
- return (0);
+ bitmap = dtls1_get_bitmap(s, rr, &is_next_epoch);
+ if (bitmap == NULL) {
+ /*
+ * Should not happen. This will only ever be NULL when the
+ * current record is from a different epoch. But that cannot
+ * be the case because we already checked the epoch above
+ */
+ SSLerr(SSL_F_DTLS1_PROCESS_BUFFERED_RECORDS,
+ ERR_R_INTERNAL_ERROR);
+ return 0;
+ }
+#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. We did this
+ * check once already when we first received the record - but
+ * we might have updated the window since then due to
+ * records we subsequently processed.
+ */
+ replayok = dtls1_record_replay_check(s, bitmap);
+ }
+
+ if (!replayok || !dtls1_process_record(s, bitmap)) {
+ /* dump this record */
+ rr->length = 0;
+ RECORD_LAYER_reset_packet_length(&s->rlayer);
+ continue;
+ }
+
if (dtls1_buffer_record(s, &(s->rlayer.d->processed_rcds),
- SSL3_RECORD_get_seq_num(s->rlayer.rrec)) < 0)
- return -1;
+ SSL3_RECORD_get_seq_num(s->rlayer.rrec)) < 0)
+ return 0;
}
}
s->rlayer.d->processed_rcds.epoch = s->rlayer.d->r_epoch;
s->rlayer.d->unprocessed_rcds.epoch = s->rlayer.d->r_epoch + 1;
- return (1);
+ return 1;
}
-
/*-
* Return up to 'len' payload bytes received in 'type' records.
* 'type' is one of the following:
* none of our business
*/
int dtls1_read_bytes(SSL *s, int type, int *recvd_type, unsigned char *buf,
- int len, int peek)
+ size_t len, int peek, size_t *read)
{
- int al, i, j, ret;
- unsigned int n;
+ int al, i, j, iret;
+ size_t ret, n;
SSL3_RECORD *rr;
void (*cb) (const SSL *ssl, int type2, int val) = NULL;
/*
* check whether there's a handshake message (client hello?) waiting
*/
- if ((ret = have_handshake_fragment(s, type, buf, len)))
- return ret;
+ ret = have_handshake_fragment(s, type, buf, len);
+ if (ret > 0) {
+ *recvd_type = SSL3_RT_HANDSHAKE;
+ *read = ret;
+ return 1;
+ }
/*
* Now s->rlayer.d->handshake_fragment_len == 0 if
/* type == SSL3_RT_APPLICATION_DATA */
i = s->handshake_func(s);
if (i < 0)
- return (i);
+ return i;
if (i == 0) {
SSLerr(SSL_F_DTLS1_READ_BYTES, SSL_R_SSL_HANDSHAKE_FAILURE);
- return (-1);
+ return -1;
}
}
/* get new packet if necessary */
if ((SSL3_RECORD_get_length(rr) == 0)
- || (s->rlayer.rstate == SSL_ST_READ_BODY)) {
- ret = dtls1_get_record(s);
- if (ret <= 0) {
- ret = dtls1_read_failed(s, ret);
+ || (s->rlayer.rstate == SSL_ST_READ_BODY)) {
+ iret = dtls1_get_record(s);
+ if (iret <= 0) {
+ iret = dtls1_read_failed(s, iret);
/* anything other than a timeout is an error */
- if (ret <= 0)
- return (ret);
+ if (iret <= 0)
+ return iret;
else
goto start;
}
}
+ /*
+ * Reset the count of consecutive warning alerts if we've got a non-empty
+ * record that isn't an alert.
+ */
+ if (SSL3_RECORD_get_type(rr) != SSL3_RT_ALERT
+ && SSL3_RECORD_get_length(rr) != 0)
+ s->rlayer.alert_count = 0;
+
/* we now have a packet which can be read and processed */
if (s->s3->change_cipher_spec /* set when we receive ChangeCipherSpec,
* data for later processing rather than dropping the connection.
*/
if (dtls1_buffer_record(s, &(s->rlayer.d->buffered_app_data),
- SSL3_RECORD_get_seq_num(rr)) < 0) {
+ SSL3_RECORD_get_seq_num(rr)) < 0) {
SSLerr(SSL_F_DTLS1_READ_BYTES, ERR_R_INTERNAL_ERROR);
return -1;
}
if (s->shutdown & SSL_RECEIVED_SHUTDOWN) {
SSL3_RECORD_set_length(rr, 0);
s->rwstate = SSL_NOTHING;
- return (0);
+ return 0;
}
if (type == SSL3_RECORD_get_type(rr)
- || (SSL3_RECORD_get_type(rr) == SSL3_RT_CHANGE_CIPHER_SPEC
- && type == SSL3_RT_HANDSHAKE && recvd_type != NULL)) {
+ || (SSL3_RECORD_get_type(rr) == SSL3_RT_CHANGE_CIPHER_SPEC
+ && type == SSL3_RT_HANDSHAKE && recvd_type != NULL)) {
/*
* SSL3_RT_APPLICATION_DATA or
* SSL3_RT_HANDSHAKE or
if (recvd_type != NULL)
*recvd_type = SSL3_RECORD_get_type(rr);
- if (len <= 0)
- return (len);
+ if (len == 0)
+ return 0;
- if ((unsigned int)len > SSL3_RECORD_get_length(rr))
+ if (len > SSL3_RECORD_get_length(rr))
n = SSL3_RECORD_get_length(rr);
else
- n = (unsigned int)len;
+ n = len;
memcpy(buf, &(SSL3_RECORD_get_data(rr)[SSL3_RECORD_get_off(rr)]), n);
if (!peek) {
- SSL3_RECORD_add_length(rr, -n);
+ SSL3_RECORD_sub_length(rr, n);
SSL3_RECORD_add_off(rr, n);
if (SSL3_RECORD_get_length(rr) == 0) {
s->rlayer.rstate = SSL_ST_READ_HEADER;
s->d1->shutdown_received
&& !BIO_dgram_sctp_msg_waiting(SSL_get_rbio(s))) {
s->shutdown |= SSL_RECEIVED_SHUTDOWN;
- return (0);
+ return 0;
}
#endif
- return (n);
+ *read = n;
+ return 1;
}
/*
* that so that we can process the data at a fixed place.
*/
{
- unsigned int k, dest_maxlen = 0;
+ size_t k, dest_maxlen = 0;
unsigned char *dest = NULL;
- unsigned int *dest_len = NULL;
+ size_t *dest_len = NULL;
if (SSL3_RECORD_get_type(rr) == SSL3_RT_HANDSHAKE) {
dest_maxlen = sizeof s->rlayer.d->handshake_fragment;
else if (SSL3_RECORD_get_type(rr) == DTLS1_RT_HEARTBEAT) {
/* We allow a 0 return */
if (dtls1_process_heartbeat(s, SSL3_RECORD_get_data(rr),
- SSL3_RECORD_get_length(rr)) < 0) {
+ SSL3_RECORD_get_length(rr)) < 0) {
return -1;
}
/* Exit and notify application to read again */
s->rwstate = SSL_READING;
BIO_clear_retry_flags(SSL_get_rbio(s));
BIO_set_retry_read(SSL_get_rbio(s));
- return (-1);
+ return -1;
}
#endif
/* else it's a CCS message, or application data or wrong */
* Application data while renegotiating is allowed. Try again
* reading.
*/
- if (SSL3_RECORD_get_type(rr) == SSL3_RT_APPLICATION_DATA) {
+ if (SSL3_RECORD_get_type(rr) == SSL3_RT_APPLICATION_DATA) {
BIO *bio;
s->s3->in_read_app_data = 2;
bio = SSL_get_rbio(s);
s->rwstate = SSL_READING;
BIO_clear_retry_flags(bio);
BIO_set_retry_read(bio);
- return (-1);
+ return -1;
}
/* Not certain if this is the right error handling */
if (dest_maxlen > 0) {
/*
- * XDTLS: In a pathalogical case, the Client Hello may be
+ * XDTLS: In a pathological case, the Client Hello may be
* fragmented--don't always expect dest_maxlen bytes
*/
- if (SSL3_RECORD_get_length(rr) < dest_maxlen) {
+ if (SSL3_RECORD_get_length(rr) < dest_maxlen) {
#ifdef DTLS1_AD_MISSING_HANDSHAKE_MESSAGE
/*
* for normal alerts rr->length is 2, while
* dest_maxlen is 7 if we were to handle this
* non-existing alert...
*/
- FIX ME
+ FIX ME;
#endif
s->rlayer.rstate = SSL_ST_READ_HEADER;
SSL3_RECORD_set_length(rr, 0);
if (ssl3_renegotiate_check(s)) {
i = s->handshake_func(s);
if (i < 0)
- return (i);
+ return i;
if (i == 0) {
- SSLerr(SSL_F_DTLS1_READ_BYTES,
- SSL_R_SSL_HANDSHAKE_FAILURE);
- return (-1);
+ SSLerr(SSL_F_DTLS1_READ_BYTES, SSL_R_SSL_HANDSHAKE_FAILURE);
+ return -1;
}
if (!(s->mode & SSL_MODE_AUTO_RETRY)) {
bio = SSL_get_rbio(s);
BIO_clear_retry_flags(bio);
BIO_set_retry_read(bio);
- return (-1);
+ return -1;
}
}
}
if (alert_level == SSL3_AL_WARNING) {
s->s3->warn_alert = alert_descr;
+
+ s->rlayer.alert_count++;
+ if (s->rlayer.alert_count == MAX_WARN_ALERT_COUNT) {
+ al = SSL_AD_UNEXPECTED_MESSAGE;
+ SSLerr(SSL_F_DTLS1_READ_BYTES, SSL_R_TOO_MANY_WARN_ALERTS);
+ goto f_err;
+ }
+
if (alert_descr == SSL_AD_CLOSE_NOTIFY) {
#ifndef OPENSSL_NO_SCTP
/*
}
#endif
s->shutdown |= SSL_RECEIVED_SHUTDOWN;
- return (0);
+ return 0;
}
#if 0
/* XXX: this is a possible improvement in the future */
s->rwstate = SSL_NOTHING;
s->s3->fatal_alert = alert_descr;
- SSLerr(SSL_F_DTLS1_READ_BYTES,
- SSL_AD_REASON_OFFSET + alert_descr);
+ SSLerr(SSL_F_DTLS1_READ_BYTES, SSL_AD_REASON_OFFSET + alert_descr);
BIO_snprintf(tmp, sizeof tmp, "%d", alert_descr);
ERR_add_error_data(2, "SSL alert number ", tmp);
s->shutdown |= SSL_RECEIVED_SHUTDOWN;
- SSL_CTX_remove_session(s->ctx, s->session);
- return (0);
+ SSL_CTX_remove_session(s->session_ctx, s->session);
+ return 0;
} else {
al = SSL_AD_ILLEGAL_PARAMETER;
SSLerr(SSL_F_DTLS1_READ_BYTES, SSL_R_UNKNOWN_ALERT_TYPE);
* shutdown */
s->rwstate = SSL_NOTHING;
SSL3_RECORD_set_length(rr, 0);
- return (0);
+ return 0;
}
if (SSL3_RECORD_get_type(rr) == SSL3_RT_CHANGE_CIPHER_SPEC) {
}
i = s->handshake_func(s);
if (i < 0)
- return (i);
+ return i;
if (i == 0) {
SSLerr(SSL_F_DTLS1_READ_BYTES, SSL_R_SSL_HANDSHAKE_FAILURE);
- return (-1);
+ return -1;
}
if (!(s->mode & SSL_MODE_AUTO_RETRY)) {
bio = SSL_get_rbio(s);
BIO_clear_retry_flags(bio);
BIO_set_retry_read(bio);
- return (-1);
+ return -1;
}
}
goto start;
(s->s3->total_renegotiations != 0) &&
ossl_statem_app_data_allowed(s)) {
s->s3->in_read_app_data = 2;
- return (-1);
+ return -1;
} else {
al = SSL_AD_UNEXPECTED_MESSAGE;
SSLerr(SSL_F_DTLS1_READ_BYTES, SSL_R_UNEXPECTED_RECORD);
f_err:
ssl3_send_alert(s, SSL3_AL_FATAL, al);
- return (-1);
+ return -1;
}
-
- /*
- * this only happens when a client hello is received and a handshake
- * is started.
- */
-static int have_handshake_fragment(SSL *s, int type, unsigned char *buf,
- int len)
+/*
+ * this only happens when a client hello is received and a handshake
+ * is started.
+ */
+static size_t have_handshake_fragment(SSL *s, int type, unsigned char *buf,
+ size_t len)
{
if ((type == SSL3_RT_HANDSHAKE)
- && (s->rlayer.d->handshake_fragment_len > 0))
+ && (s->rlayer.d->handshake_fragment_len > 0))
/* (partially) satisfy request from storage */
{
unsigned char *src = s->rlayer.d->handshake_fragment;
unsigned char *dst = buf;
- unsigned int k, n;
+ size_t k, n;
/* peek == 0 */
n = 0;
* haven't decided which version to use yet send back using version 1.0
* header: otherwise some clients will ignore it.
*/
- if (s->method->version == DTLS_ANY_VERSION) {
+ if (s->method->version == DTLS_ANY_VERSION &&
+ s->max_proto_version != DTLS1_BAD_VER) {
*(p++) = DTLS1_VERSION >> 8;
*(p++) = DTLS1_VERSION & 0xff;
} else {
* wb->buf
*/
- if (mac_size != 0) {
+ if (!SSL_USE_ETM(s) && mac_size != 0) {
if (s->method->ssl3_enc->mac(s, &wr,
- &(p[SSL3_RECORD_get_length(&wr) + eivlen]), 1) < 0)
+ &(p[SSL3_RECORD_get_length(&wr) + eivlen]),
+ 1) < 0)
goto err;
SSL3_RECORD_add_length(&wr, mac_size);
}
if (s->method->ssl3_enc->enc(s, &wr, 1, 1) < 1)
goto err;
+ if (SSL_USE_ETM(s) && mac_size != 0) {
+ if (s->method->ssl3_enc->mac(s, &wr,
+ &(p[SSL3_RECORD_get_length(&wr)]),
+ 1) < 0)
+ goto err;
+ SSL3_RECORD_add_length(&wr, mac_size);
+ }
+
/* record length after mac and block padding */
/*
* if (type == SSL3_RT_APPLICATION_DATA || (type == SSL3_RT_ALERT && !
}
DTLS1_BITMAP *dtls1_get_bitmap(SSL *s, SSL3_RECORD *rr,
- unsigned int *is_next_epoch)
+ unsigned int *is_next_epoch)
{
*is_next_epoch = 0;
if (rr->epoch == s->rlayer.d->r_epoch)
return &s->rlayer.d->bitmap;
- /* Only HM and ALERT messages can be from the next epoch */
+ /*
+ * Only HM and ALERT messages can be from the next epoch and only if we
+ * have already processed all of the unprocessed records from the last
+ * epoch
+ */
else if (rr->epoch == (unsigned long)(s->rlayer.d->r_epoch + 1) &&
- (rr->type == SSL3_RT_HANDSHAKE || rr->type == SSL3_RT_ALERT)) {
+ s->rlayer.d->unprocessed_rcds.epoch != s->rlayer.d->r_epoch &&
+ (rr->type == SSL3_RT_HANDSHAKE || rr->type == SSL3_RT_ALERT)) {
*is_next_epoch = 1;
return &s->rlayer.d->next_bitmap;
}
s->rlayer.d->r_epoch++;
memcpy(&s->rlayer.d->bitmap, &s->rlayer.d->next_bitmap,
sizeof(s->rlayer.d->bitmap));
- memset(&s->rlayer.d->next_bitmap, 0,
- sizeof(s->rlayer.d->next_bitmap));
+ memset(&s->rlayer.d->next_bitmap, 0, sizeof(s->rlayer.d->next_bitmap));
+
+ /*
+ * We must not use any buffered messages received from the previous
+ * epoch
+ */
+ dtls1_clear_received_buffer(s);
} else {
seq = s->rlayer.write_sequence;
memcpy(s->rlayer.d->last_write_sequence, seq,
projects / openssl.git / blobdiff