rl->rstate = SSL_ST_READ_HEADER;
- /* Do I need to clear read_ahead? As far as I can tell read_ahead did not
+ /*
+ * Do I need to clear read_ahead? As far as I can tell read_ahead did not
* previously get reset by SSL_clear...so I'll keep it that way..but is
* that right?
*/
int RECORD_LAYER_write_pending(const RECORD_LAYER *rl)
{
return (rl->numwpipes > 0)
- && SSL3_BUFFER_get_left(&rl->wbuf[rl->numwpipes-1]) != 0;
+ && SSL3_BUFFER_get_left(&rl->wbuf[rl->numwpipes - 1]) != 0;
}
int RECORD_LAYER_set_data(RECORD_LAYER *rl, const unsigned char *buf, int len)
for (i = 0; i < RECORD_LAYER_get_numrpipes(&s->rlayer); i++) {
if (SSL3_RECORD_get_type(&s->rlayer.rrec[i])
- != SSL3_RT_APPLICATION_DATA)
+ != SSL3_RT_APPLICATION_DATA)
return 0;
num += SSL3_RECORD_get_length(&s->rlayer.rrec[i]);
}
}
}
+/*
+ * Return values are as per SSL_read(), i.e.
+ * >0 The number of read bytes
+ * 0 Failure (not retryable)
+ * <0 Failure (may be retryable)
+ */
int ssl3_read_n(SSL *s, int n, int max, int extend, int clearold)
{
/*
/* ... now we can act as if 'extend' was set */
}
+ len = s->rlayer.packet_length;
+ pkt = rb->buf + align;
+ /*
+ * Move any available bytes to front of buffer: 'len' bytes already
+ * pointed to by 'packet', 'left' extra ones at the end
+ */
+ if (s->rlayer.packet != pkt && clearold == 1) {
+ memmove(pkt, s->rlayer.packet, len + left);
+ s->rlayer.packet = pkt;
+ rb->offset = len + align;
+ }
+
/*
* For DTLS/UDP reads should not span multiple packets because the read
* operation returns the whole packet at once (as long as it fits into
/* else we need to read more data */
- len = s->rlayer.packet_length;
- pkt = rb->buf + align;
- /*
- * Move any available bytes to front of buffer: 'len' bytes already
- * pointed to by 'packet', 'left' extra ones at the end
- */
- if (s->rlayer.packet != pkt && clearold == 1) { /* len > 0 */
- memmove(pkt, s->rlayer.packet, len + left);
- s->rlayer.packet = pkt;
- rb->offset = len + align;
- }
-
if (n > (int)(rb->len - rb->offset)) { /* does not happen */
SSLerr(SSL_F_SSL3_READ_N, ERR_R_INTERNAL_ERROR);
return -1;
if (s->mode & SSL_MODE_RELEASE_BUFFERS && !SSL_IS_DTLS(s))
if (len + left == 0)
ssl3_release_read_buffer(s);
- return (i);
+ return -1;
}
left += i;
/*
return (n);
}
-
/*
* 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.
return -1;
}
-
s->rlayer.wnum = 0;
if (SSL_in_init(s) && !ossl_statem_get_in_handshake(s)) {
/*
* We should have prevented this when we set max_pipelines so we
* shouldn't get here
- */
+ */
SSLerr(SSL_F_SSL3_WRITE_BYTES, ERR_R_INTERNAL_ERROR);
return -1;
}
if (maxpipes == 0
- || s->enc_write_ctx == NULL
- || !(EVP_CIPHER_flags(EVP_CIPHER_CTX_cipher(s->enc_write_ctx))
- & EVP_CIPH_FLAG_PIPELINE)
- || !SSL_USE_EXPLICIT_IV(s))
+ || s->enc_write_ctx == NULL
+ || !(EVP_CIPHER_flags(EVP_CIPHER_CTX_cipher(s->enc_write_ctx))
+ & EVP_CIPH_FLAG_PIPELINE)
+ || !SSL_USE_EXPLICIT_IV(s))
maxpipes = 1;
if (s->max_send_fragment == 0 || split_send_fragment > s->max_send_fragment
- || split_send_fragment == 0) {
+ || split_send_fragment == 0) {
/*
* We should have prevented this when we set the split and max send
* fragments so we shouldn't get here
- */
+ */
SSLerr(SSL_F_SSL3_WRITE_BYTES, ERR_R_INTERNAL_ERROR);
return -1;
}
sess = s->session;
if ((sess == NULL) ||
- (s->enc_write_ctx == NULL) ||
- (EVP_MD_CTX_md(s->write_hash) == NULL)) {
+ (s->enc_write_ctx == NULL) || (EVP_MD_CTX_md(s->write_hash) == NULL)) {
clear = s->enc_write_ctx ? 0 : 1; /* must be AEAD cipher */
mac_size = 0;
} else {
goto err;
if (prefix_len >
- (SSL3_RT_HEADER_LENGTH + SSL3_RT_SEND_MAX_ENCRYPTED_OVERHEAD))
- {
+ (SSL3_RT_HEADER_LENGTH + SSL3_RT_SEND_MAX_ENCRYPTED_OVERHEAD)) {
/* insufficient space */
SSLerr(SSL_F_DO_SSL3_WRITE, ERR_R_INTERNAL_ERROR);
goto err;
} else if (prefix_len) {
wb = &s->rlayer.wbuf[0];
outbuf[0] = SSL3_BUFFER_get_buf(wb) + SSL3_BUFFER_get_offset(wb)
- + prefix_len;
+ + prefix_len;
} else {
- for (j=0; j < numpipes; j++) {
+ for (j = 0; j < numpipes; j++) {
wb = &s->rlayer.wbuf[j];
#if defined(SSL3_ALIGN_PAYLOAD) && SSL3_ALIGN_PAYLOAD!=0
align = (size_t)SSL3_BUFFER_get_buf(wb) + SSL3_RT_HEADER_LENGTH;
} else
eivlen = 0;
-
totlen = 0;
/* Clear our SSL3_RECORD structures */
memset(wr, 0, sizeof wr);
- for (j=0; j < numpipes; j++) {
+ for (j = 0; j < numpipes; j++) {
/* write the header */
*(outbuf[j]++) = type & 0xff;
SSL3_RECORD_set_type(&wr[j], type);
if (!SSL_USE_ETM(s) && mac_size != 0) {
if (s->method->ssl3_enc->mac(s, &wr[j],
- &(outbuf[j][wr[j].length + eivlen]), 1) < 0)
+ &(outbuf[j][wr[j].length + eivlen]),
+ 1) < 0)
goto err;
SSL3_RECORD_add_length(&wr[j], mac_size);
}
-
SSL3_RECORD_set_data(&wr[j], outbuf[j]);
SSL3_RECORD_reset_input(&wr[j]);
if (s->method->ssl3_enc->enc(s, wr, numpipes, 1) < 1)
goto err;
- for (j=0; j < numpipes; j++) {
+ for (j = 0; j < numpipes; j++) {
if (SSL_USE_ETM(s) && mac_size != 0) {
if (s->method->ssl3_enc->mac(s, &wr[j],
outbuf[j] + wr[j].length, 1) < 0)
* we should now have wr->data pointing to the encrypted data, which is
* wr->length long
*/
- SSL3_RECORD_set_type(&wr[j], type); /* not needed but helps for debugging */
+ SSL3_RECORD_set_type(&wr[j], type); /* not needed but helps for
+ * debugging */
SSL3_RECORD_add_length(&wr[j], SSL3_RT_HEADER_LENGTH);
if (create_empty_fragment) {
/* now let's set up wb */
SSL3_BUFFER_set_left(&s->rlayer.wbuf[j],
- prefix_len + SSL3_RECORD_get_length(&wr[j]));
+ prefix_len + SSL3_RECORD_get_length(&wr[j]));
}
-
-
/*
* memorize arguments so that ssl3_write_pending can detect bad write
* retries later
return -1;
}
-/* if s->s3->wbuf.left != 0, we need to call this */
+/* if s->s3->wbuf.left != 0, we need to call this
+ *
+ * Return values are as per SSL_read(), i.e.
+ * >0 The number of read bytes
+ * 0 Failure (not retryable)
+ * <0 Failure (may be retryable)
+ */
int ssl3_write_pending(SSL *s, int type, const unsigned char *buf,
unsigned int len)
{
for (;;) {
/* Loop until we find a buffer we haven't written out yet */
if (SSL3_BUFFER_get_left(&wb[currbuf]) == 0
- && currbuf < s->rlayer.numwpipes - 1) {
+ && currbuf < s->rlayer.numwpipes - 1) {
currbuf++;
continue;
}
clear_sys_error();
if (s->wbio != NULL) {
s->rwstate = SSL_WRITING;
- i = BIO_write(s->wbio,
- (char *)&(SSL3_BUFFER_get_buf(&wb[currbuf])[
- SSL3_BUFFER_get_offset(&wb[currbuf])]),
- (unsigned int)SSL3_BUFFER_get_left(&wb[currbuf]));
+ i = BIO_write(s->wbio, (char *)
+ &(SSL3_BUFFER_get_buf(&wb[currbuf])
+ [SSL3_BUFFER_get_offset(&wb[currbuf])]),
+ (unsigned int)SSL3_BUFFER_get_left(&wb[currbuf]));
} else {
SSLerr(SSL_F_SSL3_WRITE_PENDING, SSL_R_BIO_NOT_SET);
i = -1;
*/
SSL3_BUFFER_set_left(&wb[currbuf], 0);
}
- return (i);
+ return -1;
}
SSL3_BUFFER_add_offset(&wb[currbuf], i);
SSL3_BUFFER_add_left(&wb[currbuf], -i);
/* Skip over any records we have already read */
for (curr_rec = 0;
curr_rec < num_recs && SSL3_RECORD_is_read(&rr[curr_rec]);
- curr_rec++);
+ curr_rec++) ;
if (curr_rec == num_recs) {
RECORD_LAYER_set_numrpipes(&s->rlayer, 0);
num_recs = 0;
} while (num_recs == 0);
rr = &rr[curr_rec];
+ /*
+ * 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,
}
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 (type == SSL3_RT_HANDSHAKE
- && SSL3_RECORD_get_type(rr) == SSL3_RT_CHANGE_CIPHER_SPEC
- && s->rlayer.handshake_fragment_len > 0) {
+ && SSL3_RECORD_get_type(rr) == SSL3_RT_CHANGE_CIPHER_SPEC
+ && s->rlayer.handshake_fragment_len > 0) {
al = SSL_AD_UNEXPECTED_MESSAGE;
SSLerr(SSL_F_SSL3_READ_BYTES, SSL_R_CCS_RECEIVED_EARLY);
goto f_err;
memcpy(buf, &(rr->data[rr->off]), n);
buf += n;
- if (!peek) {
+ if (peek) {
+ /* Mark any zero length record as consumed CVE-2016-6305 */
+ 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) {
goto start;
}
if (!peek && curr_rec == num_recs
- && (s->mode & SSL_MODE_RELEASE_BUFFERS)
- && SSL3_BUFFER_get_left(rbuf) == 0)
+ && (s->mode & SSL_MODE_RELEASE_BUFFERS)
+ && SSL3_BUFFER_get_left(rbuf) == 0)
ssl3_release_read_buffer(s);
return read_bytes;
}
* were actually expecting a CCS).
*/
- if (rr->type == SSL3_RT_HANDSHAKE && type == SSL3_RT_CHANGE_CIPHER_SPEC) {
- al = SSL_AD_UNEXPECTED_MESSAGE;
- SSLerr(SSL_F_SSL3_READ_BYTES, SSL_R_UNEXPECTED_MESSAGE);
- goto f_err;
- }
-
/*
* Lets just double check that we've not got an SSLv2 record
*/
}
if (s->method->version == TLS_ANY_VERSION
- && (s->server || rr->type != SSL3_RT_ALERT)) {
+ && (s->server || rr->type != SSL3_RT_ALERT)) {
/*
* If we've got this far and still haven't decided on what version
* we're using then this must be a client side alert we're dealing with
if (i < 0)
return (i);
if (i == 0) {
- SSLerr(SSL_F_SSL3_READ_BYTES,
- SSL_R_SSL_HANDSHAKE_FAILURE);
+ SSLerr(SSL_F_SSL3_READ_BYTES, SSL_R_SSL_HANDSHAKE_FAILURE);
return (-1);
}
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_SSL3_READ_BYTES, SSL_R_TOO_MANY_WARN_ALERTS);
+ goto f_err;
+ }
+
if (alert_descr == SSL_AD_CLOSE_NOTIFY) {
s->shutdown |= SSL_RECEIVED_SHUTDOWN;
return (0);
* Unexpected handshake message (Client Hello, or protocol violation)
*/
if ((s->rlayer.handshake_fragment_len >= 4)
- && !ossl_statem_get_in_handshake(s)) {
+ && !ossl_statem_get_in_handshake(s)) {
if (SSL_is_init_finished(s) &&
!(s->s3->flags & SSL3_FLAGS_NO_RENEGOTIATE_CIPHERS)) {
ossl_statem_set_in_init(s, 1);
switch (SSL3_RECORD_get_type(rr)) {
default:
/*
- * TLS up to v1.1 just ignores unknown message types: TLS v1.2 give
- * an unexpected message alert.
+ * TLS 1.0 and 1.1 say you SHOULD ignore unrecognised record types, but
+ * TLS 1.2 says you MUST send an unexpected message alert. We use the
+ * TLS 1.2 behaviour for all protocol versions to prevent issues where
+ * no progress is being made and the peer continually sends unrecognised
+ * record types, using up resources processing them.
*/
- if (s->version >= TLS1_VERSION && s->version <= TLS1_1_VERSION) {
- SSL3_RECORD_set_length(rr, 0);
- SSL3_RECORD_set_read(rr);
- goto start;
- }
al = SSL_AD_UNEXPECTED_MESSAGE;
SSLerr(SSL_F_SSL3_READ_BYTES, SSL_R_UNEXPECTED_RECORD);
goto f_err;
projects / openssl.git / blobdiff