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Clean up record layer

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Fix up various things that were missed during the record layer work. All
instances where we are breaking the encapsulation rules.

Reviewed-by: Richard Levitte <levitte@openssl.org>
This commit is contained in:
Matt Caswell 2015-03-28 00:33:05 +00:00
parent 1b34e25c17
commit 747e16398d
3 changed files with 150 additions and 121 deletions
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124
ssl/record/rec_layer_d1.c
View File

@ -480,7 +480,7 @@ int dtls1_read_bytes(SSL *s, int type, unsigned char *buf, int len, int peek)
* We are not handshaking and have no data yet, so process data buffered
* during the last handshake in advance, if any.
*/
if (s->state == SSL_ST_OK && rr->length == 0) {
if (s->state == SSL_ST_OK && SSL3_RECORD_get_length(rr) == 0) {
pitem *item;
item = pqueue_pop(s->rlayer.d->buffered_app_data.q);
if (item) {
@ -505,7 +505,8 @@ int dtls1_read_bytes(SSL *s, int type, unsigned char *buf, int len, int peek)
goto start;
/* get new packet if necessary */
if ((rr->length == 0) || (s->rlayer.rstate == SSL_ST_READ_BODY)) {
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);
@ -518,7 +519,7 @@ int dtls1_read_bytes(SSL *s, int type, unsigned char *buf, int len, int peek)
}
if (s->d1->listen && rr->type != SSL3_RT_HANDSHAKE) {
rr->length = 0;
SSL3_RECORD_set_length(rr, 0);
goto start;
}
@ -526,18 +527,18 @@ int dtls1_read_bytes(SSL *s, int type, unsigned char *buf, int len, int peek)
if (s->s3->change_cipher_spec /* set when we receive ChangeCipherSpec,
* reset by ssl3_get_finished */
&& (rr->type != SSL3_RT_HANDSHAKE)) {
&& (SSL3_RECORD_get_type(rr) != SSL3_RT_HANDSHAKE)) {
/*
* We now have application data between CCS and Finished. Most likely
* the packets were reordered on their way, so buffer the application
* data for later processing rather than dropping the connection.
*/
if (dtls1_buffer_record(s, &(s->rlayer.d->buffered_app_data),
rr->seq_num) < 0) {
SSL3_RECORD_get_seq_num(rr)) < 0) {
SSLerr(SSL_F_DTLS1_READ_BYTES, ERR_R_INTERNAL_ERROR);
return -1;
}
rr->length = 0;
SSL3_RECORD_set_length(rr, 0);
goto start;
}
@ -546,13 +547,14 @@ int dtls1_read_bytes(SSL *s, int type, unsigned char *buf, int len, int peek)
* 'peek' mode)
*/
if (s->shutdown & SSL_RECEIVED_SHUTDOWN) {
rr->length = 0;
SSL3_RECORD_set_length(rr, 0);
s->rwstate = SSL_NOTHING;
return (0);
}
if (type == rr->type) { /* SSL3_RT_APPLICATION_DATA or
* SSL3_RT_HANDSHAKE */
if (type == SSL3_RECORD_get_type(rr)) {
/* SSL3_RT_APPLICATION_DATA or
* SSL3_RT_HANDSHAKE */
/*
* make sure that we are not getting application data when we are
* doing a handshake for the first time
@ -567,18 +569,18 @@ int dtls1_read_bytes(SSL *s, int type, unsigned char *buf, int len, int peek)
if (len <= 0)
return (len);
if ((unsigned int)len > rr->length)
n = rr->length;
if ((unsigned int)len > SSL3_RECORD_get_length(rr))
n = SSL3_RECORD_get_length(rr);
else
n = (unsigned int)len;
memcpy(buf, &(rr->data[rr->off]), n);
memcpy(buf, &(SSL3_RECORD_get_data(rr)[SSL3_RECORD_get_off(rr)]), n);
if (!peek) {
rr->length -= n;
rr->off += n;
if (rr->length == 0) {
SSL3_RECORD_add_length(rr, -n);
SSL3_RECORD_add_off(rr, n);
if (SSL3_RECORD_get_length(rr) == 0) {
s->rlayer.rstate = SSL_ST_READ_HEADER;
rr->off = 0;
SSL3_RECORD_set_off(rr, 0);
}
}
#ifndef OPENSSL_NO_SCTP
@ -587,7 +589,7 @@ int dtls1_read_bytes(SSL *s, int type, unsigned char *buf, int len, int peek)
* data first, so retry.
*/
if (BIO_dgram_is_sctp(SSL_get_rbio(s)) &&
rr->type == SSL3_RT_APPLICATION_DATA &&
SSL3_RECORD_get_type(rr) == SSL3_RT_APPLICATION_DATA &&
(s->state == DTLS1_SCTP_ST_SR_READ_SOCK
|| s->state == DTLS1_SCTP_ST_CR_READ_SOCK)) {
s->rwstate = SSL_READING;
@ -624,24 +626,24 @@ int dtls1_read_bytes(SSL *s, int type, unsigned char *buf, int len, int peek)
unsigned char *dest = NULL;
unsigned int *dest_len = NULL;
if (rr->type == SSL3_RT_HANDSHAKE) {
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 (rr->type == SSL3_RT_ALERT) {
} 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 (rr->type == TLS1_RT_HEARTBEAT) {
else if (SSL3_RECORD_get_type(rr) == TLS1_RT_HEARTBEAT) {
/* We allow a 0 return */
if(dtls1_process_heartbeat(s, SSL3_RECORD_get_data(&s->rlayer.rrec),
SSL3_RECORD_get_length(&s->rlayer.rrec)) < 0) {
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 */
rr->length = 0;
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));
@ -649,12 +651,12 @@ int dtls1_read_bytes(SSL *s, int type, unsigned char *buf, int len, int peek)
}
#endif
/* else it's a CCS message, or application data or wrong */
else if (rr->type != SSL3_RT_CHANGE_CIPHER_SPEC) {
else if (SSL3_RECORD_get_type(rr) != SSL3_RT_CHANGE_CIPHER_SPEC) {
/*
* Application data while renegotiating is allowed. Try again
* reading.
*/
if (rr->type == 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);
@ -675,7 +677,7 @@ int dtls1_read_bytes(SSL *s, int type, unsigned char *buf, int len, int peek)
* XDTLS: In a pathalogical case, the Client Hello may be
* fragmented--don't always expect dest_maxlen bytes
*/
if (rr->length < dest_maxlen) {
if (SSL3_RECORD_get_length(rr) < dest_maxlen) {
#ifdef DTLS1_AD_MISSING_HANDSHAKE_MESSAGE
/*
* for normal alerts rr->length is 2, while
@ -684,15 +686,16 @@ int dtls1_read_bytes(SSL *s, int type, unsigned char *buf, int len, int peek)
*/
FIX ME
#endif
s->rlayer.rstate = SSL_ST_READ_HEADER;
rr->length = 0;
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] = rr->data[rr->off++];
rr->length--;
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;
}
@ -864,15 +867,15 @@ int dtls1_read_bytes(SSL *s, int type, unsigned char *buf, int len, int peek)
if (s->shutdown & SSL_SENT_SHUTDOWN) { /* but we have not received a
* shutdown */
s->rwstate = SSL_NOTHING;
rr->length = 0;
SSL3_RECORD_set_length(rr, 0);
return (0);
}
if (rr->type == SSL3_RT_CHANGE_CIPHER_SPEC) {
if (SSL3_RECORD_get_type(rr) == SSL3_RT_CHANGE_CIPHER_SPEC) {
struct ccs_header_st ccs_hdr;
unsigned int ccs_hdr_len = DTLS1_CCS_HEADER_LENGTH;
dtls1_get_ccs_header(rr->data, &ccs_hdr);
dtls1_get_ccs_header(SSL3_RECORD_get_data(rr), &ccs_hdr);
if (s->version == DTLS1_BAD_VER)
ccs_hdr_len = 3;
@ -882,18 +885,19 @@ int dtls1_read_bytes(SSL *s, int type, unsigned char *buf, int len, int peek)
* what the record payload has to look like
*/
/* XDTLS: check that epoch is consistent */
if ((rr->length != ccs_hdr_len) ||
(rr->off != 0) || (rr->data[0] != SSL3_MT_CCS)) {
if ((SSL3_RECORD_get_length(rr) != ccs_hdr_len)
|| (SSL3_RECORD_get_off(rr) != 0)
|| (SSL3_RECORD_get_data(rr)[0] != SSL3_MT_CCS)) {
i = SSL_AD_ILLEGAL_PARAMETER;
SSLerr(SSL_F_DTLS1_READ_BYTES, SSL_R_BAD_CHANGE_CIPHER_SPEC);
goto err;
}
rr->length = 0;
SSL3_RECORD_set_length(rr, 0);
if (s->msg_callback)
s->msg_callback(0, s->version, SSL3_RT_CHANGE_CIPHER_SPEC,
rr->data, 1, s, s->msg_callback_arg);
SSL3_RECORD_get_data(rr), 1, s, s->msg_callback_arg);
/*
* We can't process a CCS now, because previous handshake messages
@ -936,8 +940,8 @@ int dtls1_read_bytes(SSL *s, int type, unsigned char *buf, int len, int peek)
/* this may just be a stale retransmit */
dtls1_get_message_header(rr->data, &msg_hdr);
if (rr->epoch != s->rlayer.d->r_epoch) {
rr->length = 0;
if (SSL3_RECORD_get_epoch(rr) != s->rlayer.d->r_epoch) {
SSL3_RECORD_set_length(rr, 0);
goto start;
}
@ -950,7 +954,7 @@ int dtls1_read_bytes(SSL *s, int type, unsigned char *buf, int len, int peek)
return -1;
dtls1_retransmit_buffered_messages(s);
rr->length = 0;
SSL3_RECORD_set_length(rr, 0);
goto start;
}
@ -988,11 +992,11 @@ int dtls1_read_bytes(SSL *s, int type, unsigned char *buf, int len, int peek)
goto start;
}
switch (rr->type) {
switch (SSL3_RECORD_get_type(rr)) {
default:
/* TLS just ignores unknown message types */
if (s->version == TLS1_VERSION) {
rr->length = 0;
SSL3_RECORD_set_length(rr, 0);
goto start;
}
al = SSL_AD_UNEXPECTED_MESSAGE;
@ -1139,12 +1143,12 @@ int do_dtls1_write(SSL *s, int type, const unsigned char *buf,
goto err;
}
p = wb->buf + prefix_len;
p = SSL3_BUFFER_get_buf(wb) + prefix_len;
/* write the header */
*(p++) = type & 0xff;
wr->type = type;
SSL3_RECORD_set_type(wr, type);
/*
* Special case: for hello verify request, client version 1.0 and we
* haven't decided which version to use yet send back using version 1.0
@ -1179,9 +1183,9 @@ int do_dtls1_write(SSL *s, int type, const unsigned char *buf,
eivlen = 0;
/* lets setup the record stuff. */
wr->data = p + eivlen; /* make room for IV in case of CBC */
wr->length = (int)len;
wr->input = (unsigned char *)buf;
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_input(wr, (unsigned char *)buf);
/*
* we now 'read' from wr->input, wr->length bytes into wr->data
@ -1194,8 +1198,9 @@ int do_dtls1_write(SSL *s, int type, const unsigned char *buf,
goto err;
}
} else {
memcpy(wr->data, wr->input, wr->length);
wr->input = wr->data;
memcpy(SSL3_RECORD_get_data(wr), SSL3_RECORD_get_input(wr),
SSL3_RECORD_get_length(wr));
SSL3_RECORD_reset_input(wr);
}
/*
@ -1205,17 +1210,18 @@ int do_dtls1_write(SSL *s, int type, const unsigned char *buf,
*/
if (mac_size != 0) {
if (s->method->ssl3_enc->mac(s, &(p[wr->length + eivlen]), 1) < 0)
if (s->method->ssl3_enc->mac(s,
&(p[SSL3_RECORD_get_length(wr) + eivlen]), 1) < 0)
goto err;
wr->length += mac_size;
SSL3_RECORD_add_length(wr, mac_size);
}
/* this is true regardless of mac size */
wr->input = p;
wr->data = p;
SSL3_RECORD_set_data(wr, p);
SSL3_RECORD_reset_input(wr);
if (eivlen)
wr->length += eivlen;
SSL3_RECORD_add_length(wr, eivlen);
if (s->method->ssl3_enc->enc(s, 1) < 1)
goto err;
@ -1237,7 +1243,7 @@ int do_dtls1_write(SSL *s, int type, const unsigned char *buf,
memcpy(pseq, &(s->rlayer.write_sequence[2]), 6);
pseq += 6;
s2n(wr->length, pseq);
s2n(SSL3_RECORD_get_length(wr), pseq);
if (s->msg_callback)
s->msg_callback(1, 0, SSL3_RT_HEADER, pseq - DTLS1_RT_HEADER_LENGTH,
@ -1247,8 +1253,8 @@ int do_dtls1_write(SSL *s, int type, const unsigned char *buf,
* we should now have wr->data pointing to the encrypted data, which is
* wr->length long
*/
wr->type = type; /* not needed but helps for debugging */
wr->length += DTLS1_RT_HEADER_LENGTH;
SSL3_RECORD_set_type(wr, type); /* not needed but helps for debugging */
SSL3_RECORD_add_length(wr, DTLS1_RT_HEADER_LENGTH);
ssl3_record_sequence_update(&(s->rlayer.write_sequence[0]));
@ -1261,8 +1267,8 @@ int do_dtls1_write(SSL *s, int type, const unsigned char *buf,
}
/* now let's set up wb */
wb->left = prefix_len + wr->length;
wb->offset = 0;
SSL3_BUFFER_set_left(wb, prefix_len + SSL3_RECORD_get_length(wr));
SSL3_BUFFER_set_offset(wb, 0);
/*
* memorize arguments so that ssl3_write_pending can detect bad write

131
ssl/record/rec_layer_s3.c
View File

@ -683,7 +683,7 @@ int do_ssl3_write(SSL *s, int type, const unsigned char *buf,
* first check if there is a SSL3_BUFFER still being written out. This
* will happen with non blocking IO
*/
if (wb->left != 0)
if (SSL3_BUFFER_get_left(wb) != 0)
return (ssl3_write_pending(s, type, buf, len));
/* If we have an alert to send, lets send it */
@ -694,7 +694,7 @@ int do_ssl3_write(SSL *s, int type, const unsigned char *buf,
/* if it went, fall through and send more stuff */
}
if (wb->buf == NULL)
if (!SSL3_BUFFER_is_initialised(wb))
if (!ssl3_setup_write_buffer(s))
return -1;
@ -754,26 +754,26 @@ int do_ssl3_write(SSL *s, int type, const unsigned char *buf,
* multiple of SSL3_ALIGN_PAYLOAD, so if we want to align the real
* payload, then we can just pretent we simply have two headers.
*/
align = (long)wb->buf + 2 * SSL3_RT_HEADER_LENGTH;
align = (long)SSL3_BUFFER_get_buf(wb) + 2 * SSL3_RT_HEADER_LENGTH;
align = (-align) & (SSL3_ALIGN_PAYLOAD - 1);
#endif
p = wb->buf + align;
wb->offset = align;
p = SSL3_BUFFER_get_buf(wb) + align;
SSL3_BUFFER_set_offset(wb, align);
} else if (prefix_len) {
p = wb->buf + wb->offset + prefix_len;
p = SSL3_BUFFER_get_buf(wb) + SSL3_BUFFER_get_offset(wb) + prefix_len;
} else {
#if defined(SSL3_ALIGN_PAYLOAD) && SSL3_ALIGN_PAYLOAD!=0
align = (long)wb->buf + SSL3_RT_HEADER_LENGTH;
align = (long)SSL3_BUFFER_get_buf(wb) + SSL3_RT_HEADER_LENGTH;
align = (-align) & (SSL3_ALIGN_PAYLOAD - 1);
#endif
p = wb->buf + align;
wb->offset = align;
p = SSL3_BUFFER_get_buf(wb) + align;
SSL3_BUFFER_set_offset(wb, align);
}
/* write the header */
*(p++) = type & 0xff;
wr->type = type;
SSL3_RECORD_set_type(wr, type);
*(p++) = (s->version >> 8);
/*
@ -806,9 +806,10 @@ int do_ssl3_write(SSL *s, int type, const unsigned char *buf,
eivlen = 0;
/* lets setup the record stuff. */
wr->data = p + eivlen;
wr->length = (int)len;
wr->input = (unsigned char *)buf;
SSL3_RECORD_set_data(wr, p + eivlen);
SSL3_RECORD_set_length(wr, (int)len);
SSL3_RECORD_set_input(wr, (unsigned char *)buf);
/*
* we now 'read' from wr->input, wr->length bytes into wr->data
@ -822,7 +823,7 @@ int do_ssl3_write(SSL *s, int type, const unsigned char *buf,
}
} else {
memcpy(wr->data, wr->input, wr->length);
wr->input = wr->data;
SSL3_RECORD_reset_input(wr);
}
/*
@ -834,17 +835,17 @@ int do_ssl3_write(SSL *s, int type, const unsigned char *buf,
if (!SSL_USE_ETM(s) && mac_size != 0) {
if (s->method->ssl3_enc->mac(s, &(p[wr->length + eivlen]), 1) < 0)
goto err;
wr->length += mac_size;
SSL3_RECORD_add_length(wr, mac_size);
}
wr->input = p;
wr->data = p;
SSL3_RECORD_set_data(wr, p);
SSL3_RECORD_reset_input(wr);
if (eivlen) {
/*
* if (RAND_pseudo_bytes(p, eivlen) <= 0) goto err;
*/
wr->length += eivlen;
SSL3_RECORD_add_length(wr, eivlen);
}
if (s->method->ssl3_enc->enc(s, 1) < 1)
@ -853,11 +854,11 @@ int do_ssl3_write(SSL *s, int type, const unsigned char *buf,
if (SSL_USE_ETM(s) && mac_size != 0) {
if (s->method->ssl3_enc->mac(s, p + wr->length, 1) < 0)
goto err;
wr->length += mac_size;
SSL3_RECORD_add_length(wr, mac_size);
}
/* record length after mac and block padding */
s2n(wr->length, plen);
s2n(SSL3_RECORD_get_length(wr), plen);
if (s->msg_callback)
s->msg_callback(1, 0, SSL3_RT_HEADER, plen - 5, 5, s,
@ -867,19 +868,19 @@ int do_ssl3_write(SSL *s, int type, const unsigned char *buf,
* we should now have wr->data pointing to the encrypted data, which is
* wr->length long
*/
wr->type = type; /* not needed but helps for debugging */
wr->length += SSL3_RT_HEADER_LENGTH;
SSL3_RECORD_set_type(wr, type); /* not needed but helps for debugging */
SSL3_RECORD_add_length(wr, SSL3_RT_HEADER_LENGTH);
if (create_empty_fragment) {
/*
* we are in a recursive call; just return the length, don't write
* out anything here
*/
return wr->length;
return SSL3_RECORD_get_length(wr);
}
/* now let's set up wb */
wb->left = prefix_len + wr->length;
SSL3_BUFFER_set_left(wb, prefix_len + SSL3_RECORD_get_length(wr));
/*
* memorize arguments so that ssl3_write_pending can detect bad write
@ -917,15 +918,15 @@ int ssl3_write_pending(SSL *s, int type, const unsigned char *buf,
if (s->wbio != NULL) {
s->rwstate = SSL_WRITING;
i = BIO_write(s->wbio,
(char *)&(wb->buf[wb->offset]),
(unsigned int)wb->left);
(char *)&(SSL3_BUFFER_get_buf(wb)[SSL3_BUFFER_get_offset(wb)]),
(unsigned int)SSL3_BUFFER_get_left(wb));
} else {
SSLerr(SSL_F_SSL3_WRITE_PENDING, SSL_R_BIO_NOT_SET);
i = -1;
}
if (i == wb->left) {
wb->left = 0;
wb->offset += i;
if (i == SSL3_BUFFER_get_left(wb)) {
SSL3_BUFFER_set_left(wb, 0);
SSL3_BUFFER_add_offset(wb, i);
s->rwstate = SSL_NOTHING;
return (s->rlayer.wpend_ret);
} else if (i <= 0) {
@ -934,12 +935,12 @@ int ssl3_write_pending(SSL *s, int type, const unsigned char *buf,
* For DTLS, just drop it. That's kind of the whole point in
* using a datagram service
*/
wb->left = 0;
SSL3_BUFFER_set_left(wb, 0);
}
return (i);
}
wb->offset += i;
wb->left -= i;
SSL3_BUFFER_add_offset(wb, i);
SSL3_BUFFER_add_left(wb, -i);
}
}
@ -1039,7 +1040,8 @@ int ssl3_read_bytes(SSL *s, int type, unsigned char *buf, int len, int peek)
rr = &s->rlayer.rrec;
/* get new packet if necessary */
if ((rr->length == 0) || (s->rlayer.rstate == SSL_ST_READ_BODY)) {
if ((SSL3_RECORD_get_length(rr) == 0)
|| (s->rlayer.rstate == SSL_ST_READ_BODY)) {
ret = ssl3_get_record(s);
if (ret <= 0)
return (ret);
@ -1049,7 +1051,7 @@ int ssl3_read_bytes(SSL *s, int type, unsigned char *buf, int len, int peek)
if (s->s3->change_cipher_spec /* set when we receive ChangeCipherSpec,
* reset by ssl3_get_finished */
&& (rr->type != SSL3_RT_HANDSHAKE)) {
&& (SSL3_RECORD_get_type(rr) != SSL3_RT_HANDSHAKE)) {
al = SSL_AD_UNEXPECTED_MESSAGE;
SSLerr(SSL_F_SSL3_READ_BYTES, SSL_R_DATA_BETWEEN_CCS_AND_FINISHED);
goto f_err;
@ -1060,13 +1062,14 @@ int ssl3_read_bytes(SSL *s, int type, unsigned char *buf, int len, int peek)
* 'peek' mode)
*/
if (s->shutdown & SSL_RECEIVED_SHUTDOWN) {
rr->length = 0;
SSL3_RECORD_set_length(rr, 0);
s->rwstate = SSL_NOTHING;
return (0);
}
if (type == rr->type) { /* SSL3_RT_APPLICATION_DATA or
* SSL3_RT_HANDSHAKE */
if (type == SSL3_RECORD_get_type(rr)) {
/* SSL3_RT_APPLICATION_DATA or
* SSL3_RT_HANDSHAKE */
/*
* make sure that we are not getting application data when we are
* doing a handshake for the first time
@ -1081,18 +1084,18 @@ int ssl3_read_bytes(SSL *s, int type, unsigned char *buf, int len, int peek)
if (len <= 0)
return (len);
if ((unsigned int)len > rr->length)
n = rr->length;
if ((unsigned int)len > SSL3_RECORD_get_length(rr))
n = SSL3_RECORD_get_length(rr);
else
n = (unsigned int)len;
memcpy(buf, &(rr->data[rr->off]), n);
if (!peek) {
rr->length -= n;
rr->off += n;
if (rr->length == 0) {
SSL3_RECORD_add_length(rr, -n);
SSL3_RECORD_add_off(rr, n);
if (SSL3_RECORD_get_length(rr) == 0) {
s->rlayer.rstate = SSL_ST_READ_HEADER;
rr->off = 0;
SSL3_RECORD_set_off(rr, 0);
if (s->mode & SSL_MODE_RELEASE_BUFFERS
&& SSL3_BUFFER_get_left(&s->rlayer.rbuf) == 0)
ssl3_release_read_buffer(s);
@ -1115,25 +1118,25 @@ int ssl3_read_bytes(SSL *s, int type, unsigned char *buf, int len, int peek)
unsigned char *dest = NULL;
unsigned int *dest_len = NULL;
if (rr->type == SSL3_RT_HANDSHAKE) {
if (SSL3_RECORD_get_type(rr) == SSL3_RT_HANDSHAKE) {
dest_maxlen = sizeof s->rlayer.handshake_fragment;
dest = s->rlayer.handshake_fragment;
dest_len = &s->rlayer.handshake_fragment_len;
} else if (rr->type == SSL3_RT_ALERT) {
} else if (SSL3_RECORD_get_type(rr) == SSL3_RT_ALERT) {
dest_maxlen = sizeof s->rlayer.alert_fragment;
dest = s->rlayer.alert_fragment;
dest_len = &s->rlayer.alert_fragment_len;
}
#ifndef OPENSSL_NO_HEARTBEATS
else if (rr->type == TLS1_RT_HEARTBEAT) {
else if (SSL3_RECORD_get_type(rr)== TLS1_RT_HEARTBEAT) {
/* We can ignore 0 return values */
if(tls1_process_heartbeat(s, SSL3_RECORD_get_data(&s->rlayer.rrec),
SSL3_RECORD_get_length(&s->rlayer.rrec)) < 0) {
if(tls1_process_heartbeat(s, SSL3_RECORD_get_data(rr),
SSL3_RECORD_get_length(rr)) < 0) {
return -1;
}
/* Exit and notify application to read again */
rr->length = 0;
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));
@ -1143,13 +1146,15 @@ int ssl3_read_bytes(SSL *s, int type, unsigned char *buf, int len, int peek)
if (dest_maxlen > 0) {
n = dest_maxlen - *dest_len; /* available space in 'dest' */
if (rr->length < n)
n = rr->length; /* available bytes */
if (SSL3_RECORD_get_length(rr) < n)
n = SSL3_RECORD_get_length(rr); /* available bytes */
/* now move 'n' bytes: */
while (n-- > 0) {
dest[(*dest_len)++] = rr->data[rr->off++];
rr->length--;
dest[(*dest_len)++] =
SSL3_RECORD_get_data(rr)[SSL3_RECORD_get_off(rr)];
SSL3_RECORD_add_off(rr, 1);
SSL3_RECORD_add_length(rr, -1);
}
if (*dest_len < dest_maxlen)
@ -1235,7 +1240,7 @@ int ssl3_read_bytes(SSL *s, int type, unsigned char *buf, int len, int peek)
(s->rlayer.handshake_fragment[0] == SSL3_MT_CLIENT_HELLO) &&
(s->session != NULL) && (s->session->cipher != NULL) &&
!(s->ctx->options & SSL_OP_ALLOW_UNSAFE_LEGACY_RENEGOTIATION)) {
rr->length = 0;
SSL3_RECORD_set_length(rr, 0);
ssl3_send_alert(s, SSL3_AL_WARNING, SSL_AD_NO_RENEGOTIATION);
goto start;
}
@ -1306,17 +1311,18 @@ int ssl3_read_bytes(SSL *s, int type, unsigned char *buf, int len, int peek)
if (s->shutdown & SSL_SENT_SHUTDOWN) { /* but we have not received a
* shutdown */
s->rwstate = SSL_NOTHING;
rr->length = 0;
SSL3_RECORD_set_length(rr, 0);
return (0);
}
if (rr->type == SSL3_RT_CHANGE_CIPHER_SPEC) {
if (SSL3_RECORD_get_type(rr) == SSL3_RT_CHANGE_CIPHER_SPEC) {
/*
* 'Change Cipher Spec' is just a single byte, so we know exactly
* what the record payload has to look like
*/
if ((rr->length != 1) || (rr->off != 0) ||
(rr->data[0] != SSL3_MT_CCS)) {
if ((SSL3_RECORD_get_length(rr) != 1)
|| (SSL3_RECORD_get_off(rr) != 0)
|| (SSL3_RECORD_get_data(rr)[0] != SSL3_MT_CCS)) {
al = SSL_AD_ILLEGAL_PARAMETER;
SSLerr(SSL_F_SSL3_READ_BYTES, SSL_R_BAD_CHANGE_CIPHER_SPEC);
goto f_err;
@ -1337,11 +1343,12 @@ int ssl3_read_bytes(SSL *s, int type, unsigned char *buf, int len, int peek)
s->s3->flags &= ~SSL3_FLAGS_CCS_OK;
rr->length = 0;
SSL3_RECORD_set_length(rr, 0);
if (s->msg_callback)
s->msg_callback(0, s->version, SSL3_RT_CHANGE_CIPHER_SPEC,
rr->data, 1, s, s->msg_callback_arg);
SSL3_RECORD_get_data(rr), 1, s,
s->msg_callback_arg);
s->s3->change_cipher_spec = 1;
if (!ssl3_do_change_cipher_spec(s))
@ -1388,14 +1395,14 @@ int ssl3_read_bytes(SSL *s, int type, unsigned char *buf, int len, int peek)
goto start;
}
switch (rr->type) {
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.
*/
if (s->version >= TLS1_VERSION && s->version <= TLS1_1_VERSION) {
rr->length = 0;
SSL3_RECORD_set_length(rr, 0);
goto start;
}
al = SSL_AD_UNEXPECTED_MESSAGE;

16
ssl/record/record_locl.h
View File

@ -155,6 +155,11 @@ void dtls1_record_bitmap_update(SSL *s, DTLS1_BITMAP *bitmap);
#define SSL3_BUFFER_get_len(b) ((b)->len)
#define SSL3_BUFFER_set_len(b, l) ((b)->len = (l))
#define SSL3_BUFFER_get_left(b) ((b)->left)
#define SSL3_BUFFER_set_left(b, l) ((b)->left = (l))
#define SSL3_BUFFER_add_left(b, l) ((b)->left += (l))
#define SSL3_BUFFER_get_offset(b) ((b)->offset)
#define SSL3_BUFFER_set_offset(b, o) ((b)->offset = (o))
#define SSL3_BUFFER_add_offset(b, o) ((b)->offset += (o))
#define SSL3_BUFFER_is_initialised(b) ((b)->buf != NULL)
void SSL3_BUFFER_set_data(SSL3_BUFFER *b, const unsigned char *d, int n);
@ -167,9 +172,20 @@ int ssl3_release_write_buffer(SSL *s);
/* Macros/functions provided by the SSL3_RECORD component */
#define SSL3_RECORD_get_type(r) ((r)->type)
#define SSL3_RECORD_set_type(r, t) ((r)->type = (t))
#define SSL3_RECORD_get_length(r) ((r)->length)
#define SSL3_RECORD_set_length(r, l) ((r)->length = (l))
#define SSL3_RECORD_add_length(r, l) ((r)->length += (l))
#define SSL3_RECORD_get_data(r) ((r)->data)
#define SSL3_RECORD_set_data(r, d) ((r)->data = (d))
#define SSL3_RECORD_get_input(r) ((r)->input)
#define SSL3_RECORD_set_input(r, i) ((r)->input = (i))
#define SSL3_RECORD_reset_input(r) ((r)->input = (r)->data)
#define SSL3_RECORD_get_seq_num(r) ((r)->seq_num)
#define SSL3_RECORD_get_off(r) ((r)->off)
#define SSL3_RECORD_set_off(r, o) ((r)->off = (o))
#define SSL3_RECORD_add_off(r, o) ((r)->off += (o))
#define SSL3_RECORD_get_epoch(r) ((r)->epoch)
void SSL3_RECORD_clear(SSL3_RECORD *r);
void SSL3_RECORD_release(SSL3_RECORD *r);