/*
- * Copyright 2005-2016 The OpenSSL Project Authors. All Rights Reserved.
+ * Copyright 2005-2018 The OpenSSL Project Authors. All Rights Reserved.
*
- * Licensed under the OpenSSL license (the "License"). You may not use
+ * Licensed under the Apache License 2.0 (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 <errno.h>
-#define USE_SOCKETS
#include "../ssl_locl.h"
#include <openssl/evp.h>
#include <openssl/buffer.h>
#include "record_locl.h"
+#include "../packet_locl.h"
+#include "internal/cryptlib.h"
int DTLS_RECORD_LAYER_new(RECORD_LAYER *rl)
{
DTLS_RECORD_LAYER *d;
- if ((d = OPENSSL_malloc(sizeof(*d))) == NULL)
- return (0);
+ if ((d = OPENSSL_malloc(sizeof(*d))) == NULL) {
+ SSLerr(SSL_F_DTLS_RECORD_LAYER_NEW, ERR_R_MALLOC_FAILURE);
+ return 0;
+ }
rl->d = d;
pqueue_free(d->buffered_app_data.q);
OPENSSL_free(d);
rl->d = NULL;
- return (0);
+ return 0;
}
return 1;
rl->d->w_epoch = e;
}
-void DTLS_RECORD_LAYER_resync_write(RECORD_LAYER *rl)
-{
- 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);
-
/* copy buffered record into SSL structure */
static int dtls1_copy_record(SSL *s, pitem *item)
{
/* Set proper sequence number for mac calculation */
memcpy(&(s->rlayer.read_sequence[2]), &(rdata->packet[5]), 6);
- return (1);
+ return 1;
}
int dtls1_buffer_record(SSL *s, record_pqueue *queue, unsigned char *priority)
if (rdata == NULL || item == NULL) {
OPENSSL_free(rdata);
pitem_free(item);
- SSLerr(SSL_F_DTLS1_BUFFER_RECORD, ERR_R_INTERNAL_ERROR);
+ SSLfatal(s, SSL_AD_INTERNAL_ERROR, SSL_F_DTLS1_BUFFER_RECORD,
+ ERR_R_INTERNAL_ERROR);
return -1;
}
memset(&s->rlayer.rrec, 0, sizeof(s->rlayer.rrec));
if (!ssl3_setup_buffers(s)) {
- SSLerr(SSL_F_DTLS1_BUFFER_RECORD, ERR_R_INTERNAL_ERROR);
+ /* SSLfatal() already called */
OPENSSL_free(rdata->rbuf.buf);
OPENSSL_free(rdata);
pitem_free(item);
- return (-1);
+ return -1;
}
- /* insert should not fail, since duplicates are dropped */
if (pqueue_insert(queue->q, item) == NULL) {
- SSLerr(SSL_F_DTLS1_BUFFER_RECORD, ERR_R_INTERNAL_ERROR);
+ /* Must be a duplicate so ignore it */
OPENSSL_free(rdata->rbuf.buf);
OPENSSL_free(rdata);
pitem_free(item);
- return (-1);
}
- return (1);
+ return 1;
}
int dtls1_retrieve_buffered_record(SSL *s, record_pqueue *queue)
OPENSSL_free(item->data);
pitem_free(item);
- return (1);
+ return 1;
}
- return (0);
+ return 0;
}
/*
* 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);
+ SSLfatal(s, SSL_AD_INTERNAL_ERROR,
+ SSL_F_DTLS1_PROCESS_BUFFERED_RECORDS,
+ ERR_R_INTERNAL_ERROR);
return 0;
}
#ifndef OPENSSL_NO_SCTP
}
if (!replayok || !dtls1_process_record(s, bitmap)) {
+ if (ossl_statem_in_error(s)) {
+ /* dtls1_process_record called SSLfatal() */
+ return -1;
+ }
/* dump this record */
rr->length = 0;
RECORD_LAYER_reset_packet_length(&s->rlayer);
}
if (dtls1_buffer_record(s, &(s->rlayer.d->processed_rcds),
- SSL3_RECORD_get_seq_num(s->rlayer.rrec)) < 0)
+ SSL3_RECORD_get_seq_num(s->rlayer.rrec)) < 0) {
+ /* SSLfatal() already called */
return 0;
+ }
}
}
* 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 *readbytes)
{
- int al, i, j, ret;
- unsigned int n;
+ int i, j, iret;
+ size_t n;
SSL3_RECORD *rr;
void (*cb) (const SSL *ssl, int type2, int val) = NULL;
if (!SSL3_BUFFER_is_initialised(&s->rlayer.rbuf)) {
/* Not initialized yet */
- if (!ssl3_setup_buffers(s))
- return (-1);
+ if (!ssl3_setup_buffers(s)) {
+ /* SSLfatal() already called */
+ return -1;
+ }
}
if ((type && (type != SSL3_RT_APPLICATION_DATA) &&
(type != SSL3_RT_HANDSHAKE)) ||
(peek && (type != SSL3_RT_APPLICATION_DATA))) {
- SSLerr(SSL_F_DTLS1_READ_BYTES, ERR_R_INTERNAL_ERROR);
+ SSLfatal(s, SSL_AD_INTERNAL_ERROR, SSL_F_DTLS1_READ_BYTES,
+ ERR_R_INTERNAL_ERROR);
return -1;
}
- /*
- * check whether there's a handshake message (client hello?) waiting
- */
- if ((ret = have_handshake_fragment(s, type, buf, len)))
- return ret;
-
- /*
- * Now s->rlayer.d->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 ((!ossl_statem_get_in_handshake(s) && SSL_in_init(s)) ||
- (BIO_dgram_is_sctp(SSL_get_rbio(s))
- && ossl_statem_in_sctp_read_sock(s)
- && s->s3->in_read_app_data != 2))
-#else
- if (!ossl_statem_get_in_handshake(s) && SSL_in_init(s))
-#endif
- {
+ if (!ossl_statem_get_in_handshake(s) && SSL_in_init(s)) {
/* type == SSL3_RT_APPLICATION_DATA */
i = s->handshake_func(s);
+ /* SSLfatal() already called if appropriate */
if (i < 0)
- return (i);
- if (i == 0) {
- SSLerr(SSL_F_DTLS1_READ_BYTES, SSL_R_SSL_HANDSHAKE_FAILURE);
- return (-1);
- }
+ return i;
+ if (i == 0)
+ return -1;
}
start:
}
/* Check for timeout */
- if (dtls1_handle_timeout(s) > 0)
+ if (dtls1_handle_timeout(s) > 0) {
goto start;
+ } else if (ossl_statem_in_error(s)) {
+ /* dtls1_handle_timeout() has failed with a fatal error */
+ 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);
- /* anything other than a timeout is an error */
- if (ret <= 0)
- return (ret);
+ RECORD_LAYER_set_numrpipes(&s->rlayer, 0);
+ iret = dtls1_get_record(s);
+ if (iret <= 0) {
+ iret = dtls1_read_failed(s, iret);
+ /*
+ * Anything other than a timeout is an error. SSLfatal() already
+ * called if appropriate.
+ */
+ if (iret <= 0)
+ return iret;
else
goto start;
}
+ RECORD_LAYER_set_numrpipes(&s->rlayer, 1);
}
/*
*/
if (dtls1_buffer_record(s, &(s->rlayer.d->buffered_app_data),
SSL3_RECORD_get_seq_num(rr)) < 0) {
- SSLerr(SSL_F_DTLS1_READ_BYTES, ERR_R_INTERNAL_ERROR);
+ /* SSLfatal() already called */
return -1;
}
SSL3_RECORD_set_length(rr, 0);
+ SSL3_RECORD_set_read(rr);
goto start;
}
*/
if (s->shutdown & SSL_RECEIVED_SHUTDOWN) {
SSL3_RECORD_set_length(rr, 0);
+ SSL3_RECORD_set_read(rr);
s->rwstate = SSL_NOTHING;
- return (0);
+ return 0;
}
if (type == SSL3_RECORD_get_type(rr)
*/
if (SSL_in_init(s) && (type == SSL3_RT_APPLICATION_DATA) &&
(s->enc_read_ctx == NULL)) {
- al = SSL_AD_UNEXPECTED_MESSAGE;
- SSLerr(SSL_F_DTLS1_READ_BYTES, SSL_R_APP_DATA_IN_HANDSHAKE);
- goto f_err;
+ SSLfatal(s, SSL_AD_UNEXPECTED_MESSAGE, SSL_F_DTLS1_READ_BYTES,
+ SSL_R_APP_DATA_IN_HANDSHAKE);
+ return -1;
}
if (recvd_type != NULL)
*recvd_type = SSL3_RECORD_get_type(rr);
- if (len <= 0)
- return (len);
+ if (len == 0) {
+ /*
+ * Mark a zero length record as read. This ensures multiple calls to
+ * SSL_read() with a zero length buffer will eventually cause
+ * SSL_pending() to report data as being available.
+ */
+ if (SSL3_RECORD_get_length(rr) == 0)
+ SSL3_RECORD_set_read(rr);
+ 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) {
+ if (peek) {
+ if (SSL3_RECORD_get_length(rr) == 0)
+ SSL3_RECORD_set_read(rr);
+ } else {
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;
SSL3_RECORD_set_off(rr, 0);
+ SSL3_RECORD_set_read(rr);
}
}
#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)) &&
- SSL3_RECORD_get_type(rr) == SSL3_RT_APPLICATION_DATA &&
- ossl_statem_in_sctp_read_sock(s)) {
- 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
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);
+ *readbytes = n;
+ return 1;
}
/*
* then it was unexpected (Hello Request or Client Hello).
*/
- /*
- * In case of record types for which we have 'fragment' storage, fill
- * that so that we can process the data at a fixed place.
- */
- {
- unsigned int k, dest_maxlen = 0;
- unsigned char *dest = NULL;
- unsigned int *dest_len = NULL;
-
- if (SSL3_RECORD_get_type(rr) == SSL3_RT_HANDSHAKE) {
- dest_maxlen = sizeof s->rlayer.d->handshake_fragment;
- dest = s->rlayer.d->handshake_fragment;
- dest_len = &s->rlayer.d->handshake_fragment_len;
- } else if (SSL3_RECORD_get_type(rr) == SSL3_RT_ALERT) {
- dest_maxlen = sizeof(s->rlayer.d->alert_fragment);
- dest = s->rlayer.d->alert_fragment;
- dest_len = &s->rlayer.d->alert_fragment_len;
- }
-#ifndef OPENSSL_NO_HEARTBEATS
- 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) {
- return -1;
- }
- /* Exit and notify application to read again */
- SSL3_RECORD_set_length(rr, 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 (SSL3_RECORD_get_type(rr) != SSL3_RT_CHANGE_CIPHER_SPEC) {
- /*
- * Application data while renegotiating is allowed. Try again
- * reading.
- */
- 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);
- }
-
- /* Not certain if this is the right error handling */
- al = SSL_AD_UNEXPECTED_MESSAGE;
- SSLerr(SSL_F_DTLS1_READ_BYTES, SSL_R_UNEXPECTED_RECORD);
- goto f_err;
- }
-
- if (dest_maxlen > 0) {
- /*
- * 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) {
-#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;
-#endif
- s->rlayer.rstate = SSL_ST_READ_HEADER;
- SSL3_RECORD_set_length(rr, 0);
- goto start;
- }
-
- /* now move 'n' bytes: */
- for (k = 0; k < dest_maxlen; k++) {
- dest[k] = SSL3_RECORD_get_data(rr)[SSL3_RECORD_get_off(rr)];
- SSL3_RECORD_add_off(rr, 1);
- SSL3_RECORD_add_length(rr, -1);
- }
- *dest_len = dest_maxlen;
- }
- }
-
- /*-
- * s->rlayer.d->handshake_fragment_len == 12 iff rr->type == SSL3_RT_HANDSHAKE;
- * s->rlayer.d->alert_fragment_len == 7 iff rr->type == SSL3_RT_ALERT.
- * (Possibly rr is 'empty' now, i.e. rr->length may be 0.)
- */
-
- /* If we are a client, check for an incoming 'Hello Request': */
- if ((!s->server) &&
- (s->rlayer.d->handshake_fragment_len >= DTLS1_HM_HEADER_LENGTH) &&
- (s->rlayer.d->handshake_fragment[0] == SSL3_MT_HELLO_REQUEST) &&
- (s->session != NULL) && (s->session->cipher != NULL)) {
- s->rlayer.d->handshake_fragment_len = 0;
-
- if ((s->rlayer.d->handshake_fragment[1] != 0) ||
- (s->rlayer.d->handshake_fragment[2] != 0) ||
- (s->rlayer.d->handshake_fragment[3] != 0)) {
- al = SSL_AD_DECODE_ERROR;
- SSLerr(SSL_F_DTLS1_READ_BYTES, SSL_R_BAD_HELLO_REQUEST);
- goto f_err;
- }
-
- /*
- * no need to check sequence number on HELLO REQUEST messages
- */
-
- if (s->msg_callback)
- s->msg_callback(0, s->version, SSL3_RT_HANDSHAKE,
- s->rlayer.d->handshake_fragment, 4, s,
- s->msg_callback_arg);
-
- if (SSL_is_init_finished(s) &&
- !(s->s3->flags & SSL3_FLAGS_NO_RENEGOTIATE_CIPHERS) &&
- !s->s3->renegotiate) {
- s->d1->handshake_read_seq++;
- s->new_session = 1;
- ssl3_renegotiate(s);
- if (ssl3_renegotiate_check(s)) {
- i = s->handshake_func(s);
- if (i < 0)
- return (i);
- if (i == 0) {
- SSLerr(SSL_F_DTLS1_READ_BYTES, SSL_R_SSL_HANDSHAKE_FAILURE);
- return (-1);
- }
-
- if (!(s->mode & SSL_MODE_AUTO_RETRY)) {
- if (SSL3_BUFFER_get_left(&s->rlayer.rbuf) == 0) {
- /* no read-ahead left? */
- BIO *bio;
- /*
- * In the case where we try to read application data,
- * but we trigger an SSL handshake, we return -1 with
- * the retry option set. Otherwise renegotiation may
- * cause nasty problems in the blocking world
- */
- s->rwstate = SSL_READING;
- bio = SSL_get_rbio(s);
- BIO_clear_retry_flags(bio);
- BIO_set_retry_read(bio);
- return (-1);
- }
- }
- }
+ if (SSL3_RECORD_get_type(rr) == SSL3_RT_ALERT) {
+ unsigned int alert_level, alert_descr;
+ unsigned char *alert_bytes = SSL3_RECORD_get_data(rr)
+ + SSL3_RECORD_get_off(rr);
+ PACKET alert;
+
+ if (!PACKET_buf_init(&alert, alert_bytes, SSL3_RECORD_get_length(rr))
+ || !PACKET_get_1(&alert, &alert_level)
+ || !PACKET_get_1(&alert, &alert_descr)
+ || PACKET_remaining(&alert) != 0) {
+ SSLfatal(s, SSL_AD_UNEXPECTED_MESSAGE, SSL_F_DTLS1_READ_BYTES,
+ SSL_R_INVALID_ALERT);
+ return -1;
}
- /*
- * we either finished a handshake or ignored the request, now try
- * again to obtain the (application) data we were asked for
- */
- goto start;
- }
-
- if (s->rlayer.d->alert_fragment_len >= DTLS1_AL_HEADER_LENGTH) {
- int alert_level = s->rlayer.d->alert_fragment[0];
- int alert_descr = s->rlayer.d->alert_fragment[1];
-
- s->rlayer.d->alert_fragment_len = 0;
if (s->msg_callback)
- s->msg_callback(0, s->version, SSL3_RT_ALERT,
- s->rlayer.d->alert_fragment, 2, s,
+ s->msg_callback(0, s->version, SSL3_RT_ALERT, alert_bytes, 2, s,
s->msg_callback_arg);
if (s->info_callback != NULL)
if (alert_level == SSL3_AL_WARNING) {
s->s3->warn_alert = alert_descr;
+ SSL3_RECORD_set_read(rr);
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;
+ SSLfatal(s, SSL_AD_UNEXPECTED_MESSAGE, SSL_F_DTLS1_READ_BYTES,
+ SSL_R_TOO_MANY_WARN_ALERTS);
+ return -1;
}
if (alert_descr == SSL_AD_CLOSE_NOTIFY) {
}
#endif
s->shutdown |= SSL_RECEIVED_SHUTDOWN;
- return (0);
- }
-#if 0
- /* XXX: this is a possible improvement in the future */
- /* now check if it's a missing record */
- if (alert_descr == DTLS1_AD_MISSING_HANDSHAKE_MESSAGE) {
- unsigned short seq;
- unsigned int frag_off;
- unsigned char *p = &(s->rlayer.d->alert_fragment[2]);
-
- n2s(p, seq);
- n2l3(p, frag_off);
-
- dtls1_retransmit_message(s,
- dtls1_get_queue_priority
- (frag->msg_header.seq, 0), frag_off,
- &found);
- if (!found && SSL_in_init(s)) {
- /*
- * fprintf( stderr,"in init = %d\n", SSL_in_init(s));
- */
- /*
- * requested a message not yet sent, send an alert
- * ourselves
- */
- ssl3_send_alert(s, SSL3_AL_WARNING,
- DTLS1_AD_MISSING_HANDSHAKE_MESSAGE);
- }
+ return 0;
}
-#endif
} else if (alert_level == SSL3_AL_FATAL) {
char tmp[16];
s->rwstate = SSL_NOTHING;
s->s3->fatal_alert = alert_descr;
- SSLerr(SSL_F_DTLS1_READ_BYTES, SSL_AD_REASON_OFFSET + alert_descr);
+ SSLfatal(s, SSL_AD_NO_ALERT, 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;
+ SSL3_RECORD_set_read(rr);
SSL_CTX_remove_session(s->session_ctx, s->session);
- return (0);
+ return 0;
} else {
- al = SSL_AD_ILLEGAL_PARAMETER;
- SSLerr(SSL_F_DTLS1_READ_BYTES, SSL_R_UNKNOWN_ALERT_TYPE);
- goto f_err;
+ SSLfatal(s, SSL_AD_ILLEGAL_PARAMETER, SSL_F_DTLS1_READ_BYTES,
+ SSL_R_UNKNOWN_ALERT_TYPE);
+ return -1;
}
goto start;
* shutdown */
s->rwstate = SSL_NOTHING;
SSL3_RECORD_set_length(rr, 0);
- return (0);
+ SSL3_RECORD_set_read(rr);
+ return 0;
}
if (SSL3_RECORD_get_type(rr) == SSL3_RT_CHANGE_CIPHER_SPEC) {
* are still missing, so just drop it.
*/
SSL3_RECORD_set_length(rr, 0);
+ SSL3_RECORD_set_read(rr);
goto start;
}
/*
* Unexpected handshake message (Client Hello, or protocol violation)
*/
- if ((s->rlayer.d->handshake_fragment_len >= DTLS1_HM_HEADER_LENGTH) &&
- !ossl_statem_get_in_handshake(s)) {
+ if ((SSL3_RECORD_get_type(rr) == SSL3_RT_HANDSHAKE) &&
+ !ossl_statem_get_in_handshake(s)) {
struct hm_header_st msg_hdr;
- /* this may just be a stale retransmit */
- dtls1_get_message_header(rr->data, &msg_hdr);
- if (SSL3_RECORD_get_epoch(rr) != s->rlayer.d->r_epoch) {
+ /*
+ * This may just be a stale retransmit. Also sanity check that we have
+ * at least enough record bytes for a message header
+ */
+ if (SSL3_RECORD_get_epoch(rr) != s->rlayer.d->r_epoch
+ || SSL3_RECORD_get_length(rr) < DTLS1_HM_HEADER_LENGTH) {
SSL3_RECORD_set_length(rr, 0);
+ SSL3_RECORD_set_read(rr);
goto start;
}
+ dtls1_get_message_header(rr->data, &msg_hdr);
+
/*
* If we are server, we may have a repeated FINISHED of the client
* here, then retransmit our CCS and FINISHED.
*/
if (msg_hdr.type == SSL3_MT_FINISHED) {
- if (dtls1_check_timeout_num(s) < 0)
+ if (dtls1_check_timeout_num(s) < 0) {
+ /* SSLfatal) already called */
return -1;
+ }
- dtls1_retransmit_buffered_messages(s);
+ if (dtls1_retransmit_buffered_messages(s) <= 0) {
+ /* Fail if we encountered a fatal error */
+ if (ossl_statem_in_error(s))
+ return -1;
+ }
SSL3_RECORD_set_length(rr, 0);
+ SSL3_RECORD_set_read(rr);
+ if (!(s->mode & SSL_MODE_AUTO_RETRY)) {
+ if (SSL3_BUFFER_get_left(&s->rlayer.rbuf) == 0) {
+ /* no read-ahead left? */
+ BIO *bio;
+
+ s->rwstate = SSL_READING;
+ bio = SSL_get_rbio(s);
+ BIO_clear_retry_flags(bio);
+ BIO_set_retry_read(bio);
+ return -1;
+ }
+ }
goto start;
}
- if (SSL_is_init_finished(s) &&
- !(s->s3->flags & SSL3_FLAGS_NO_RENEGOTIATE_CIPHERS)) {
- ossl_statem_set_in_init(s, 1);
- s->renegotiate = 1;
- s->new_session = 1;
+ /*
+ * To get here we must be trying to read app data but found handshake
+ * data. But if we're trying to read app data, and we're not in init
+ * (which is tested for at the top of this function) then init must be
+ * finished
+ */
+ if (!ossl_assert(SSL_is_init_finished(s))) {
+ SSLfatal(s, SSL_AD_INTERNAL_ERROR, SSL_F_DTLS1_READ_BYTES,
+ ERR_R_INTERNAL_ERROR);
+ return -1;
}
+
+ /* We found handshake data, so we're going back into init */
+ ossl_statem_set_in_init(s, 1);
+
i = s->handshake_func(s);
+ /* SSLfatal() called if appropriate */
if (i < 0)
- return (i);
- if (i == 0) {
- SSLerr(SSL_F_DTLS1_READ_BYTES, SSL_R_SSL_HANDSHAKE_FAILURE);
- return (-1);
- }
+ return i;
+ if (i == 0)
+ return -1;
if (!(s->mode & SSL_MODE_AUTO_RETRY)) {
if (SSL3_BUFFER_get_left(&s->rlayer.rbuf) == 0) {
bio = SSL_get_rbio(s);
BIO_clear_retry_flags(bio);
BIO_set_retry_read(bio);
- return (-1);
+ return -1;
}
}
goto start;
switch (SSL3_RECORD_get_type(rr)) {
default:
- /* TLS just ignores unknown message types */
- if (s->version == TLS1_VERSION) {
- SSL3_RECORD_set_length(rr, 0);
- goto start;
- }
- al = SSL_AD_UNEXPECTED_MESSAGE;
- SSLerr(SSL_F_DTLS1_READ_BYTES, SSL_R_UNEXPECTED_RECORD);
- goto f_err;
+ SSLfatal(s, SSL_AD_UNEXPECTED_MESSAGE, SSL_F_DTLS1_READ_BYTES,
+ SSL_R_UNEXPECTED_RECORD);
+ return -1;
case SSL3_RT_CHANGE_CIPHER_SPEC:
case SSL3_RT_ALERT:
case SSL3_RT_HANDSHAKE:
* SSL3_RT_HANDSHAKE when ossl_statem_get_in_handshake(s) is true, but
* that should not happen when type != rr->type
*/
- al = SSL_AD_UNEXPECTED_MESSAGE;
- SSLerr(SSL_F_DTLS1_READ_BYTES, ERR_R_INTERNAL_ERROR);
- goto f_err;
+ SSLfatal(s, SSL_AD_UNEXPECTED_MESSAGE, SSL_F_DTLS1_READ_BYTES,
+ ERR_R_INTERNAL_ERROR);
+ return -1;
case SSL3_RT_APPLICATION_DATA:
/*
* At this point, we were expecting handshake data, but have
(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);
- goto f_err;
+ SSLfatal(s, SSL_AD_UNEXPECTED_MESSAGE, SSL_F_DTLS1_READ_BYTES,
+ SSL_R_UNEXPECTED_RECORD);
+ return -1;
}
}
/* not reached */
-
- f_err:
- ssl3_send_alert(s, SSL3_AL_FATAL, al);
- 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)
-{
-
- if ((type == SSL3_RT_HANDSHAKE)
- && (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;
-
- /* peek == 0 */
- n = 0;
- while ((len > 0) && (s->rlayer.d->handshake_fragment_len > 0)) {
- *dst++ = *src++;
- len--;
- s->rlayer.d->handshake_fragment_len--;
- n++;
- }
- /* move any remaining fragment bytes: */
- for (k = 0; k < s->rlayer.d->handshake_fragment_len; k++)
- s->rlayer.d->handshake_fragment[k] = *src++;
- return n;
- }
-
- return 0;
}
/*
* Call this to write data in records of type 'type' It will return <= 0 if
* not all data has been sent or non-blocking IO.
*/
-int dtls1_write_bytes(SSL *s, int type, const void *buf, int len)
+int dtls1_write_bytes(SSL *s, int type, const void *buf, size_t len,
+ size_t *written)
{
int i;
- OPENSSL_assert(len <= SSL3_RT_MAX_PLAIN_LENGTH);
+ if (!ossl_assert(len <= SSL3_RT_MAX_PLAIN_LENGTH)) {
+ SSLfatal(s, SSL_AD_INTERNAL_ERROR, SSL_F_DTLS1_WRITE_BYTES,
+ ERR_R_INTERNAL_ERROR);
+ return -1;
+ }
s->rwstate = SSL_NOTHING;
- i = do_dtls1_write(s, type, buf, len, 0);
+ i = do_dtls1_write(s, type, buf, len, 0, written);
return i;
}
int do_dtls1_write(SSL *s, int type, const unsigned char *buf,
- unsigned int len, int create_empty_fragment)
+ size_t len, int create_empty_fragment, size_t *written)
{
unsigned char *p, *pseq;
int i, mac_size, clear = 0;
- int prefix_len = 0;
+ size_t prefix_len = 0;
int eivlen;
SSL3_RECORD wr;
SSL3_BUFFER *wb;
* first check if there is a SSL3_BUFFER still being written out. This
* will happen with non blocking IO
*/
- if (SSL3_BUFFER_get_left(wb) != 0) {
- OPENSSL_assert(0); /* XDTLS: want to see if we ever get here */
- return (ssl3_write_pending(s, type, buf, len));
+ if (!ossl_assert(SSL3_BUFFER_get_left(wb) == 0)) {
+ SSLfatal(s, SSL_AD_INTERNAL_ERROR, SSL_F_DO_DTLS1_WRITE,
+ ERR_R_INTERNAL_ERROR);
+ return 0;
}
/* If we have an alert to send, lets send it */
if (s->s3->alert_dispatch) {
i = s->method->ssl_dispatch_alert(s);
if (i <= 0)
- return (i);
+ return i;
/* if it went, fall through and send more stuff */
}
if (len == 0 && !create_empty_fragment)
return 0;
+ if (len > ssl_get_max_send_fragment(s)) {
+ SSLfatal(s, SSL_AD_INTERNAL_ERROR, SSL_F_DO_DTLS1_WRITE,
+ SSL_R_EXCEEDS_MAX_FRAGMENT_SIZE);
+ return 0;
+ }
+
sess = s->session;
if ((sess == NULL) ||
mac_size = 0;
else {
mac_size = EVP_MD_CTX_size(s->write_hash);
- if (mac_size < 0)
- goto err;
+ if (mac_size < 0) {
+ SSLfatal(s, SSL_AD_INTERNAL_ERROR, SSL_F_DO_DTLS1_WRITE,
+ SSL_R_EXCEEDS_MAX_FRAGMENT_SIZE);
+ return -1;
+ }
}
p = SSL3_BUFFER_get_buf(wb) + prefix_len;
/* lets setup the record stuff. */
SSL3_RECORD_set_data(&wr, p + eivlen); /* make room for IV in case of CBC */
- SSL3_RECORD_set_length(&wr, (int)len);
+ SSL3_RECORD_set_length(&wr, len);
SSL3_RECORD_set_input(&wr, (unsigned char *)buf);
/*
/* first we compress */
if (s->compress != NULL) {
if (!ssl3_do_compress(s, &wr)) {
- SSLerr(SSL_F_DO_DTLS1_WRITE, SSL_R_COMPRESSION_FAILURE);
- goto err;
+ SSLfatal(s, SSL_AD_INTERNAL_ERROR, SSL_F_DO_DTLS1_WRITE,
+ SSL_R_COMPRESSION_FAILURE);
+ return -1;
}
} else {
memcpy(SSL3_RECORD_get_data(&wr), SSL3_RECORD_get_input(&wr),
* wb->buf
*/
- if (mac_size != 0) {
- if (s->method->ssl3_enc->mac(s, &wr,
- &(p[SSL3_RECORD_get_length(&wr) + eivlen]),
- 1) < 0)
- goto err;
+ if (!SSL_WRITE_ETM(s) && mac_size != 0) {
+ if (!s->method->ssl3_enc->mac(s, &wr,
+ &(p[SSL3_RECORD_get_length(&wr) + eivlen]),
+ 1)) {
+ SSLfatal(s, SSL_AD_INTERNAL_ERROR, SSL_F_DO_DTLS1_WRITE,
+ ERR_R_INTERNAL_ERROR);
+ return -1;
+ }
SSL3_RECORD_add_length(&wr, mac_size);
}
if (eivlen)
SSL3_RECORD_add_length(&wr, eivlen);
- if (s->method->ssl3_enc->enc(s, &wr, 1, 1) < 1)
- goto err;
+ if (s->method->ssl3_enc->enc(s, &wr, 1, 1) < 1) {
+ if (!ossl_statem_in_error(s)) {
+ SSLfatal(s, SSL_AD_INTERNAL_ERROR, SSL_F_DO_DTLS1_WRITE,
+ ERR_R_INTERNAL_ERROR);
+ }
+ return -1;
+ }
+
+ if (SSL_WRITE_ETM(s) && mac_size != 0) {
+ if (!s->method->ssl3_enc->mac(s, &wr,
+ &(p[SSL3_RECORD_get_length(&wr)]), 1)) {
+ SSLfatal(s, SSL_AD_INTERNAL_ERROR, SSL_F_DO_DTLS1_WRITE,
+ ERR_R_INTERNAL_ERROR);
+ return -1;
+ }
+ SSL3_RECORD_add_length(&wr, mac_size);
+ }
/* record length after mac and block padding */
- /*
- * if (type == SSL3_RT_APPLICATION_DATA || (type == SSL3_RT_ALERT && !
- * SSL_in_init(s)))
- */
/* there's only one epoch between handshake and app data */
s2n(s->rlayer.d->w_epoch, pseq);
- /* XDTLS: ?? */
- /*
- * else s2n(s->d1->handshake_epoch, pseq);
- */
-
memcpy(pseq, &(s->rlayer.write_sequence[2]), 6);
pseq += 6;
s2n(SSL3_RECORD_get_length(&wr), pseq);
* we are in a recursive call; just return the length, don't write
* out anything here
*/
- return wr.length;
+ *written = wr.length;
+ return 1;
}
/* now let's set up wb */
s->rlayer.wpend_type = type;
s->rlayer.wpend_ret = len;
- /* we now just need to write the buffer */
- return ssl3_write_pending(s, type, buf, len);
- err:
- return -1;
+ /* we now just need to write the buffer. Calls SSLfatal() as required. */
+ return ssl3_write_pending(s, type, buf, len, written);
}
DTLS1_BITMAP *dtls1_get_bitmap(SSL *s, SSL3_RECORD *rr,
projects / openssl.git / blobdiff