2 * Copyright 1995-2016 The OpenSSL Project Authors. All Rights Reserved.
4 * Licensed under the OpenSSL license (the "License"). You may not use
5 * this file except in compliance with the License. You can obtain a copy
6 * in the file LICENSE in the source distribution or at
7 * https://www.openssl.org/source/license.html
14 #include "../ssl_locl.h"
15 #include <openssl/evp.h>
16 #include <openssl/buffer.h>
17 #include <openssl/rand.h>
18 #include "record_locl.h"
20 #ifndef EVP_CIPH_FLAG_TLS1_1_MULTIBLOCK
21 # define EVP_CIPH_FLAG_TLS1_1_MULTIBLOCK 0
24 #if defined(OPENSSL_SMALL_FOOTPRINT) || \
25 !( defined(AES_ASM) && ( \
26 defined(__x86_64) || defined(__x86_64__) || \
27 defined(_M_AMD64) || defined(_M_X64) ) \
29 # undef EVP_CIPH_FLAG_TLS1_1_MULTIBLOCK
30 # define EVP_CIPH_FLAG_TLS1_1_MULTIBLOCK 0
33 void RECORD_LAYER_init(RECORD_LAYER
*rl
, SSL
*s
)
36 RECORD_LAYER_set_first_record(&s
->rlayer
);
37 SSL3_RECORD_clear(rl
->rrec
, SSL_MAX_PIPELINES
);
40 void RECORD_LAYER_clear(RECORD_LAYER
*rl
)
44 rl
->rstate
= SSL_ST_READ_HEADER
;
47 * Do I need to clear read_ahead? As far as I can tell read_ahead did not
48 * previously get reset by SSL_clear...so I'll keep it that way..but is
53 rl
->packet_length
= 0;
55 memset(rl
->alert_fragment
, 0, sizeof(rl
->alert_fragment
));
56 rl
->alert_fragment_len
= 0;
57 memset(rl
->handshake_fragment
, 0, sizeof(rl
->handshake_fragment
));
58 rl
->handshake_fragment_len
= 0;
64 SSL3_BUFFER_clear(&rl
->rbuf
);
65 for (pipes
= 0; pipes
< rl
->numwpipes
; pipes
++)
66 SSL3_BUFFER_clear(&rl
->wbuf
[pipes
]);
69 SSL3_RECORD_clear(rl
->rrec
, SSL_MAX_PIPELINES
);
71 RECORD_LAYER_reset_read_sequence(rl
);
72 RECORD_LAYER_reset_write_sequence(rl
);
75 DTLS_RECORD_LAYER_clear(rl
);
78 void RECORD_LAYER_release(RECORD_LAYER
*rl
)
80 if (SSL3_BUFFER_is_initialised(&rl
->rbuf
))
81 ssl3_release_read_buffer(rl
->s
);
82 if (rl
->numwpipes
> 0)
83 ssl3_release_write_buffer(rl
->s
);
84 SSL3_RECORD_release(rl
->rrec
, SSL_MAX_PIPELINES
);
87 int RECORD_LAYER_read_pending(const RECORD_LAYER
*rl
)
89 return SSL3_BUFFER_get_left(&rl
->rbuf
) != 0;
92 int RECORD_LAYER_write_pending(const RECORD_LAYER
*rl
)
94 return (rl
->numwpipes
> 0)
95 && SSL3_BUFFER_get_left(&rl
->wbuf
[rl
->numwpipes
- 1]) != 0;
98 int RECORD_LAYER_set_data(RECORD_LAYER
*rl
, const unsigned char *buf
, int len
)
100 rl
->packet_length
= len
;
102 rl
->rstate
= SSL_ST_READ_HEADER
;
103 if (!SSL3_BUFFER_is_initialised(&rl
->rbuf
))
104 if (!ssl3_setup_read_buffer(rl
->s
))
108 rl
->packet
= SSL3_BUFFER_get_buf(&rl
->rbuf
);
109 SSL3_BUFFER_set_data(&rl
->rbuf
, buf
, len
);
114 void RECORD_LAYER_reset_read_sequence(RECORD_LAYER
*rl
)
116 memset(rl
->read_sequence
, 0, sizeof(rl
->read_sequence
));
119 void RECORD_LAYER_reset_write_sequence(RECORD_LAYER
*rl
)
121 memset(rl
->write_sequence
, 0, sizeof(rl
->write_sequence
));
124 int ssl3_pending(const SSL
*s
)
129 if (s
->rlayer
.rstate
== SSL_ST_READ_BODY
)
132 for (i
= 0; i
< RECORD_LAYER_get_numrpipes(&s
->rlayer
); i
++) {
133 if (SSL3_RECORD_get_type(&s
->rlayer
.rrec
[i
])
134 != SSL3_RT_APPLICATION_DATA
)
136 num
+= SSL3_RECORD_get_length(&s
->rlayer
.rrec
[i
]);
142 void SSL_CTX_set_default_read_buffer_len(SSL_CTX
*ctx
, size_t len
)
144 ctx
->default_read_buf_len
= len
;
147 void SSL_set_default_read_buffer_len(SSL
*s
, size_t len
)
149 SSL3_BUFFER_set_default_len(RECORD_LAYER_get_rbuf(&s
->rlayer
), len
);
152 const char *SSL_rstate_string_long(const SSL
*s
)
154 switch (s
->rlayer
.rstate
) {
155 case SSL_ST_READ_HEADER
:
156 return "read header";
157 case SSL_ST_READ_BODY
:
159 case SSL_ST_READ_DONE
:
166 const char *SSL_rstate_string(const SSL
*s
)
168 switch (s
->rlayer
.rstate
) {
169 case SSL_ST_READ_HEADER
:
171 case SSL_ST_READ_BODY
:
173 case SSL_ST_READ_DONE
:
181 * Return values are as per SSL_read(), i.e.
182 * >0 The number of read bytes
183 * 0 Failure (not retryable)
184 * <0 Failure (may be retryable)
186 int ssl3_read_n(SSL
*s
, int n
, int max
, int extend
, int clearold
)
189 * If extend == 0, obtain new n-byte packet; if extend == 1, increase
190 * packet by another n bytes. The packet will be in the sub-array of
191 * s->s3->rbuf.buf specified by s->packet and s->packet_length. (If
192 * s->rlayer.read_ahead is set, 'max' bytes may be stored in rbuf [plus
193 * s->packet_length bytes if extend == 1].)
194 * if clearold == 1, move the packet to the start of the buffer; if
195 * clearold == 0 then leave any old packets where they were
205 rb
= &s
->rlayer
.rbuf
;
207 if (!ssl3_setup_read_buffer(s
))
211 #if defined(SSL3_ALIGN_PAYLOAD) && SSL3_ALIGN_PAYLOAD!=0
212 align
= (size_t)rb
->buf
+ SSL3_RT_HEADER_LENGTH
;
213 align
= SSL3_ALIGN_PAYLOAD
- 1 - ((align
- 1) % SSL3_ALIGN_PAYLOAD
);
217 /* start with empty packet ... */
220 else if (align
!= 0 && left
>= SSL3_RT_HEADER_LENGTH
) {
222 * check if next packet length is large enough to justify payload
225 pkt
= rb
->buf
+ rb
->offset
;
226 if (pkt
[0] == SSL3_RT_APPLICATION_DATA
227 && (pkt
[3] << 8 | pkt
[4]) >= 128) {
229 * Note that even if packet is corrupted and its length field
230 * is insane, we can only be led to wrong decision about
231 * whether memmove will occur or not. Header values has no
232 * effect on memmove arguments and therefore no buffer
233 * overrun can be triggered.
235 memmove(rb
->buf
+ align
, pkt
, left
);
239 s
->rlayer
.packet
= rb
->buf
+ rb
->offset
;
240 s
->rlayer
.packet_length
= 0;
241 /* ... now we can act as if 'extend' was set */
245 * For DTLS/UDP reads should not span multiple packets because the read
246 * operation returns the whole packet at once (as long as it fits into
249 if (SSL_IS_DTLS(s
)) {
250 if (left
== 0 && extend
)
252 if (left
> 0 && n
> left
)
256 /* if there is enough in the buffer from a previous read, take some */
258 s
->rlayer
.packet_length
+= n
;
264 /* else we need to read more data */
266 len
= s
->rlayer
.packet_length
;
267 pkt
= rb
->buf
+ align
;
269 * Move any available bytes to front of buffer: 'len' bytes already
270 * pointed to by 'packet', 'left' extra ones at the end
272 if (s
->rlayer
.packet
!= pkt
&& clearold
== 1) { /* len > 0 */
273 memmove(pkt
, s
->rlayer
.packet
, len
+ left
);
274 s
->rlayer
.packet
= pkt
;
275 rb
->offset
= len
+ align
;
278 if (n
> (int)(rb
->len
- rb
->offset
)) { /* does not happen */
279 SSLerr(SSL_F_SSL3_READ_N
, ERR_R_INTERNAL_ERROR
);
283 /* We always act like read_ahead is set for DTLS */
284 if (!s
->rlayer
.read_ahead
&& !SSL_IS_DTLS(s
))
285 /* ignore max parameter */
290 if (max
> (int)(rb
->len
- rb
->offset
))
291 max
= rb
->len
- rb
->offset
;
296 * Now we have len+left bytes at the front of s->s3->rbuf.buf and
297 * need to read in more until we have len+n (up to len+max if
302 if (s
->rbio
!= NULL
) {
303 s
->rwstate
= SSL_READING
;
304 i
= BIO_read(s
->rbio
, pkt
+ len
+ left
, max
- left
);
306 SSLerr(SSL_F_SSL3_READ_N
, SSL_R_READ_BIO_NOT_SET
);
312 if (s
->mode
& SSL_MODE_RELEASE_BUFFERS
&& !SSL_IS_DTLS(s
))
314 ssl3_release_read_buffer(s
);
319 * reads should *never* span multiple packets for DTLS because the
320 * underlying transport protocol is message oriented as opposed to
321 * byte oriented as in the TLS case.
323 if (SSL_IS_DTLS(s
)) {
325 n
= left
; /* makes the while condition false */
329 /* done reading, now the book-keeping */
332 s
->rlayer
.packet_length
+= n
;
333 s
->rwstate
= SSL_NOTHING
;
338 * Call this to write data in records of type 'type' It will return <= 0 if
339 * not all data has been sent or non-blocking IO.
341 int ssl3_write_bytes(SSL
*s
, int type
, const void *buf_
, int len
)
343 const unsigned char *buf
= buf_
;
345 unsigned int n
, split_send_fragment
, maxpipes
;
346 #if !defined(OPENSSL_NO_MULTIBLOCK) && EVP_CIPH_FLAG_TLS1_1_MULTIBLOCK
347 unsigned int max_send_fragment
, nw
;
348 unsigned int u_len
= (unsigned int)len
;
350 SSL3_BUFFER
*wb
= &s
->rlayer
.wbuf
[0];
354 SSLerr(SSL_F_SSL3_WRITE_BYTES
, SSL_R_SSL_NEGATIVE_LENGTH
);
358 s
->rwstate
= SSL_NOTHING
;
359 tot
= s
->rlayer
.wnum
;
361 * ensure that if we end up with a smaller value of data to write out
362 * than the the original len from a write which didn't complete for
363 * non-blocking I/O and also somehow ended up avoiding the check for
364 * this in ssl3_write_pending/SSL_R_BAD_WRITE_RETRY as it must never be
365 * possible to end up with (len-tot) as a large number that will then
366 * promptly send beyond the end of the users buffer ... so we trap and
367 * report the error in a way the user will notice
369 if ((unsigned int)len
< s
->rlayer
.wnum
) {
370 SSLerr(SSL_F_SSL3_WRITE_BYTES
, SSL_R_BAD_LENGTH
);
376 if (SSL_in_init(s
) && !ossl_statem_get_in_handshake(s
)) {
377 i
= s
->handshake_func(s
);
381 SSLerr(SSL_F_SSL3_WRITE_BYTES
, SSL_R_SSL_HANDSHAKE_FAILURE
);
387 * first check if there is a SSL3_BUFFER still being written out. This
388 * will happen with non blocking IO
391 i
= ssl3_write_pending(s
, type
, &buf
[tot
], s
->rlayer
.wpend_tot
);
393 /* XXX should we ssl3_release_write_buffer if i<0? */
394 s
->rlayer
.wnum
= tot
;
397 tot
+= i
; /* this might be last fragment */
399 #if !defined(OPENSSL_NO_MULTIBLOCK) && EVP_CIPH_FLAG_TLS1_1_MULTIBLOCK
401 * Depending on platform multi-block can deliver several *times*
402 * better performance. Downside is that it has to allocate
403 * jumbo buffer to accommodate up to 8 records, but the
404 * compromise is considered worthy.
406 if (type
== SSL3_RT_APPLICATION_DATA
&&
407 u_len
>= 4 * (max_send_fragment
= s
->max_send_fragment
) &&
408 s
->compress
== NULL
&& s
->msg_callback
== NULL
&&
409 !SSL_USE_ETM(s
) && SSL_USE_EXPLICIT_IV(s
) &&
410 EVP_CIPHER_flags(EVP_CIPHER_CTX_cipher(s
->enc_write_ctx
)) &
411 EVP_CIPH_FLAG_TLS1_1_MULTIBLOCK
) {
412 unsigned char aad
[13];
413 EVP_CTRL_TLS1_1_MULTIBLOCK_PARAM mb_param
;
416 /* minimize address aliasing conflicts */
417 if ((max_send_fragment
& 0xfff) == 0)
418 max_send_fragment
-= 512;
420 if (tot
== 0 || wb
->buf
== NULL
) { /* allocate jumbo buffer */
421 ssl3_release_write_buffer(s
);
423 packlen
= EVP_CIPHER_CTX_ctrl(s
->enc_write_ctx
,
424 EVP_CTRL_TLS1_1_MULTIBLOCK_MAX_BUFSIZE
,
425 max_send_fragment
, NULL
);
427 if (u_len
>= 8 * max_send_fragment
)
432 if (!ssl3_setup_write_buffer(s
, 1, packlen
)) {
433 SSLerr(SSL_F_SSL3_WRITE_BYTES
, ERR_R_MALLOC_FAILURE
);
436 } else if (tot
== len
) { /* done? */
437 /* free jumbo buffer */
438 ssl3_release_write_buffer(s
);
444 if (n
< 4 * max_send_fragment
) {
445 /* free jumbo buffer */
446 ssl3_release_write_buffer(s
);
450 if (s
->s3
->alert_dispatch
) {
451 i
= s
->method
->ssl_dispatch_alert(s
);
453 s
->rlayer
.wnum
= tot
;
458 if (n
>= 8 * max_send_fragment
)
459 nw
= max_send_fragment
* (mb_param
.interleave
= 8);
461 nw
= max_send_fragment
* (mb_param
.interleave
= 4);
463 memcpy(aad
, s
->rlayer
.write_sequence
, 8);
465 aad
[9] = (unsigned char)(s
->version
>> 8);
466 aad
[10] = (unsigned char)(s
->version
);
473 packlen
= EVP_CIPHER_CTX_ctrl(s
->enc_write_ctx
,
474 EVP_CTRL_TLS1_1_MULTIBLOCK_AAD
,
475 sizeof(mb_param
), &mb_param
);
477 if (packlen
<= 0 || packlen
> (int)wb
->len
) { /* never happens */
478 /* free jumbo buffer */
479 ssl3_release_write_buffer(s
);
483 mb_param
.out
= wb
->buf
;
484 mb_param
.inp
= &buf
[tot
];
487 if (EVP_CIPHER_CTX_ctrl(s
->enc_write_ctx
,
488 EVP_CTRL_TLS1_1_MULTIBLOCK_ENCRYPT
,
489 sizeof(mb_param
), &mb_param
) <= 0)
492 s
->rlayer
.write_sequence
[7] += mb_param
.interleave
;
493 if (s
->rlayer
.write_sequence
[7] < mb_param
.interleave
) {
495 while (j
>= 0 && (++s
->rlayer
.write_sequence
[j
--]) == 0) ;
501 s
->rlayer
.wpend_tot
= nw
;
502 s
->rlayer
.wpend_buf
= &buf
[tot
];
503 s
->rlayer
.wpend_type
= type
;
504 s
->rlayer
.wpend_ret
= nw
;
506 i
= ssl3_write_pending(s
, type
, &buf
[tot
], nw
);
508 if (i
< 0 && (!s
->wbio
|| !BIO_should_retry(s
->wbio
))) {
509 /* free jumbo buffer */
510 ssl3_release_write_buffer(s
);
512 s
->rlayer
.wnum
= tot
;
516 /* free jumbo buffer */
517 ssl3_release_write_buffer(s
);
525 if (tot
== len
) { /* done? */
526 if (s
->mode
& SSL_MODE_RELEASE_BUFFERS
&& !SSL_IS_DTLS(s
))
527 ssl3_release_write_buffer(s
);
534 split_send_fragment
= s
->split_send_fragment
;
536 * If max_pipelines is 0 then this means "undefined" and we default to
537 * 1 pipeline. Similarly if the cipher does not support pipelined
538 * processing then we also only use 1 pipeline, or if we're not using
541 maxpipes
= s
->max_pipelines
;
542 if (maxpipes
> SSL_MAX_PIPELINES
) {
544 * We should have prevented this when we set max_pipelines so we
547 SSLerr(SSL_F_SSL3_WRITE_BYTES
, ERR_R_INTERNAL_ERROR
);
551 || s
->enc_write_ctx
== NULL
552 || !(EVP_CIPHER_flags(EVP_CIPHER_CTX_cipher(s
->enc_write_ctx
))
553 & EVP_CIPH_FLAG_PIPELINE
)
554 || !SSL_USE_EXPLICIT_IV(s
))
556 if (s
->max_send_fragment
== 0 || split_send_fragment
> s
->max_send_fragment
557 || split_send_fragment
== 0) {
559 * We should have prevented this when we set the split and max send
560 * fragments so we shouldn't get here
562 SSLerr(SSL_F_SSL3_WRITE_BYTES
, ERR_R_INTERNAL_ERROR
);
567 unsigned int pipelens
[SSL_MAX_PIPELINES
], tmppipelen
, remain
;
568 unsigned int numpipes
, j
;
573 numpipes
= ((n
- 1) / split_send_fragment
) + 1;
574 if (numpipes
> maxpipes
)
577 if (n
/ numpipes
>= s
->max_send_fragment
) {
579 * We have enough data to completely fill all available
582 for (j
= 0; j
< numpipes
; j
++) {
583 pipelens
[j
] = s
->max_send_fragment
;
586 /* We can partially fill all available pipelines */
587 tmppipelen
= n
/ numpipes
;
588 remain
= n
% numpipes
;
589 for (j
= 0; j
< numpipes
; j
++) {
590 pipelens
[j
] = tmppipelen
;
596 i
= do_ssl3_write(s
, type
, &(buf
[tot
]), pipelens
, numpipes
, 0);
598 /* XXX should we ssl3_release_write_buffer if i<0? */
599 s
->rlayer
.wnum
= tot
;
604 (type
== SSL3_RT_APPLICATION_DATA
&&
605 (s
->mode
& SSL_MODE_ENABLE_PARTIAL_WRITE
))) {
607 * next chunk of data should get another prepended empty fragment
608 * in ciphersuites with known-IV weakness:
610 s
->s3
->empty_fragment_done
= 0;
612 if ((i
== (int)n
) && s
->mode
& SSL_MODE_RELEASE_BUFFERS
&&
614 ssl3_release_write_buffer(s
);
624 int do_ssl3_write(SSL
*s
, int type
, const unsigned char *buf
,
625 unsigned int *pipelens
, unsigned int numpipes
,
626 int create_empty_fragment
)
628 unsigned char *outbuf
[SSL_MAX_PIPELINES
], *plen
[SSL_MAX_PIPELINES
];
629 SSL3_RECORD wr
[SSL_MAX_PIPELINES
];
630 int i
, mac_size
, clear
= 0;
636 unsigned int totlen
= 0;
639 for (j
= 0; j
< numpipes
; j
++)
640 totlen
+= pipelens
[j
];
642 * first check if there is a SSL3_BUFFER still being written out. This
643 * will happen with non blocking IO
645 if (RECORD_LAYER_write_pending(&s
->rlayer
))
646 return (ssl3_write_pending(s
, type
, buf
, totlen
));
648 /* If we have an alert to send, lets send it */
649 if (s
->s3
->alert_dispatch
) {
650 i
= s
->method
->ssl_dispatch_alert(s
);
653 /* if it went, fall through and send more stuff */
656 if (s
->rlayer
.numwpipes
< numpipes
)
657 if (!ssl3_setup_write_buffer(s
, numpipes
, 0))
660 if (totlen
== 0 && !create_empty_fragment
)
665 if ((sess
== NULL
) ||
666 (s
->enc_write_ctx
== NULL
) || (EVP_MD_CTX_md(s
->write_hash
) == NULL
)) {
667 clear
= s
->enc_write_ctx
? 0 : 1; /* must be AEAD cipher */
670 mac_size
= EVP_MD_CTX_size(s
->write_hash
);
676 * 'create_empty_fragment' is true only when this function calls itself
678 if (!clear
&& !create_empty_fragment
&& !s
->s3
->empty_fragment_done
) {
680 * countermeasure against known-IV weakness in CBC ciphersuites (see
681 * http://www.openssl.org/~bodo/tls-cbc.txt)
684 if (s
->s3
->need_empty_fragments
&& type
== SSL3_RT_APPLICATION_DATA
) {
686 * recursive function call with 'create_empty_fragment' set; this
687 * prepares and buffers the data for an empty fragment (these
688 * 'prefix_len' bytes are sent out later together with the actual
691 unsigned int tmppipelen
= 0;
693 prefix_len
= do_ssl3_write(s
, type
, buf
, &tmppipelen
, 1, 1);
698 (SSL3_RT_HEADER_LENGTH
+ SSL3_RT_SEND_MAX_ENCRYPTED_OVERHEAD
)) {
699 /* insufficient space */
700 SSLerr(SSL_F_DO_SSL3_WRITE
, ERR_R_INTERNAL_ERROR
);
705 s
->s3
->empty_fragment_done
= 1;
708 if (create_empty_fragment
) {
709 wb
= &s
->rlayer
.wbuf
[0];
710 #if defined(SSL3_ALIGN_PAYLOAD) && SSL3_ALIGN_PAYLOAD!=0
712 * extra fragment would be couple of cipher blocks, which would be
713 * multiple of SSL3_ALIGN_PAYLOAD, so if we want to align the real
714 * payload, then we can just pretend we simply have two headers.
716 align
= (size_t)SSL3_BUFFER_get_buf(wb
) + 2 * SSL3_RT_HEADER_LENGTH
;
717 align
= SSL3_ALIGN_PAYLOAD
- 1 - ((align
- 1) % SSL3_ALIGN_PAYLOAD
);
719 outbuf
[0] = SSL3_BUFFER_get_buf(wb
) + align
;
720 SSL3_BUFFER_set_offset(wb
, align
);
721 } else if (prefix_len
) {
722 wb
= &s
->rlayer
.wbuf
[0];
723 outbuf
[0] = SSL3_BUFFER_get_buf(wb
) + SSL3_BUFFER_get_offset(wb
)
726 for (j
= 0; j
< numpipes
; j
++) {
727 wb
= &s
->rlayer
.wbuf
[j
];
728 #if defined(SSL3_ALIGN_PAYLOAD) && SSL3_ALIGN_PAYLOAD!=0
729 align
= (size_t)SSL3_BUFFER_get_buf(wb
) + SSL3_RT_HEADER_LENGTH
;
730 align
= SSL3_ALIGN_PAYLOAD
- 1 - ((align
- 1) % SSL3_ALIGN_PAYLOAD
);
732 outbuf
[j
] = SSL3_BUFFER_get_buf(wb
) + align
;
733 SSL3_BUFFER_set_offset(wb
, align
);
737 /* Explicit IV length, block ciphers appropriate version flag */
738 if (s
->enc_write_ctx
&& SSL_USE_EXPLICIT_IV(s
)) {
739 int mode
= EVP_CIPHER_CTX_mode(s
->enc_write_ctx
);
740 if (mode
== EVP_CIPH_CBC_MODE
) {
741 eivlen
= EVP_CIPHER_CTX_iv_length(s
->enc_write_ctx
);
745 /* Need explicit part of IV for GCM mode */
746 else if (mode
== EVP_CIPH_GCM_MODE
)
747 eivlen
= EVP_GCM_TLS_EXPLICIT_IV_LEN
;
748 else if (mode
== EVP_CIPH_CCM_MODE
)
749 eivlen
= EVP_CCM_TLS_EXPLICIT_IV_LEN
;
756 /* Clear our SSL3_RECORD structures */
757 memset(wr
, 0, sizeof wr
);
758 for (j
= 0; j
< numpipes
; j
++) {
759 /* write the header */
760 *(outbuf
[j
]++) = type
& 0xff;
761 SSL3_RECORD_set_type(&wr
[j
], type
);
763 *(outbuf
[j
]++) = (s
->version
>> 8);
765 * Some servers hang if initial client hello is larger than 256 bytes
766 * and record version number > TLS 1.0
768 if (SSL_get_state(s
) == TLS_ST_CW_CLNT_HELLO
769 && !s
->renegotiate
&& TLS1_get_version(s
) > TLS1_VERSION
)
770 *(outbuf
[j
]++) = 0x1;
772 *(outbuf
[j
]++) = s
->version
& 0xff;
774 /* field where we are to write out packet length */
778 /* lets setup the record stuff. */
779 SSL3_RECORD_set_data(&wr
[j
], outbuf
[j
] + eivlen
);
780 SSL3_RECORD_set_length(&wr
[j
], (int)pipelens
[j
]);
781 SSL3_RECORD_set_input(&wr
[j
], (unsigned char *)&buf
[totlen
]);
782 totlen
+= pipelens
[j
];
785 * we now 'read' from wr->input, wr->length bytes into wr->data
788 /* first we compress */
789 if (s
->compress
!= NULL
) {
790 if (!ssl3_do_compress(s
, &wr
[j
])) {
791 SSLerr(SSL_F_DO_SSL3_WRITE
, SSL_R_COMPRESSION_FAILURE
);
795 memcpy(wr
[j
].data
, wr
[j
].input
, wr
[j
].length
);
796 SSL3_RECORD_reset_input(&wr
[j
]);
800 * we should still have the output to wr->data and the input from
801 * wr->input. Length should be wr->length. wr->data still points in the
805 if (!SSL_USE_ETM(s
) && mac_size
!= 0) {
806 if (s
->method
->ssl3_enc
->mac(s
, &wr
[j
],
807 &(outbuf
[j
][wr
[j
].length
+ eivlen
]),
810 SSL3_RECORD_add_length(&wr
[j
], mac_size
);
813 SSL3_RECORD_set_data(&wr
[j
], outbuf
[j
]);
814 SSL3_RECORD_reset_input(&wr
[j
]);
818 * if (RAND_pseudo_bytes(p, eivlen) <= 0) goto err;
820 SSL3_RECORD_add_length(&wr
[j
], eivlen
);
824 if (s
->method
->ssl3_enc
->enc(s
, wr
, numpipes
, 1) < 1)
827 for (j
= 0; j
< numpipes
; j
++) {
828 if (SSL_USE_ETM(s
) && mac_size
!= 0) {
829 if (s
->method
->ssl3_enc
->mac(s
, &wr
[j
],
830 outbuf
[j
] + wr
[j
].length
, 1) < 0)
832 SSL3_RECORD_add_length(&wr
[j
], mac_size
);
835 /* record length after mac and block padding */
836 s2n(SSL3_RECORD_get_length(&wr
[j
]), plen
[j
]);
839 s
->msg_callback(1, 0, SSL3_RT_HEADER
, plen
[j
] - 5, 5, s
,
840 s
->msg_callback_arg
);
843 * we should now have wr->data pointing to the encrypted data, which is
846 SSL3_RECORD_set_type(&wr
[j
], type
); /* not needed but helps for
848 SSL3_RECORD_add_length(&wr
[j
], SSL3_RT_HEADER_LENGTH
);
850 if (create_empty_fragment
) {
852 * we are in a recursive call; just return the length, don't write
856 /* We should never be pipelining an empty fragment!! */
857 SSLerr(SSL_F_DO_SSL3_WRITE
, ERR_R_INTERNAL_ERROR
);
860 return SSL3_RECORD_get_length(wr
);
863 /* now let's set up wb */
864 SSL3_BUFFER_set_left(&s
->rlayer
.wbuf
[j
],
865 prefix_len
+ SSL3_RECORD_get_length(&wr
[j
]));
869 * memorize arguments so that ssl3_write_pending can detect bad write
872 s
->rlayer
.wpend_tot
= totlen
;
873 s
->rlayer
.wpend_buf
= buf
;
874 s
->rlayer
.wpend_type
= type
;
875 s
->rlayer
.wpend_ret
= totlen
;
877 /* we now just need to write the buffer */
878 return ssl3_write_pending(s
, type
, buf
, totlen
);
883 /* if s->s3->wbuf.left != 0, we need to call this
885 * Return values are as per SSL_read(), i.e.
886 * >0 The number of read bytes
887 * 0 Failure (not retryable)
888 * <0 Failure (may be retryable)
890 int ssl3_write_pending(SSL
*s
, int type
, const unsigned char *buf
,
894 SSL3_BUFFER
*wb
= s
->rlayer
.wbuf
;
895 unsigned int currbuf
= 0;
898 if ((s
->rlayer
.wpend_tot
> (int)len
)
899 || ((s
->rlayer
.wpend_buf
!= buf
) &&
900 !(s
->mode
& SSL_MODE_ACCEPT_MOVING_WRITE_BUFFER
))
901 || (s
->rlayer
.wpend_type
!= type
)) {
902 SSLerr(SSL_F_SSL3_WRITE_PENDING
, SSL_R_BAD_WRITE_RETRY
);
907 /* Loop until we find a buffer we haven't written out yet */
908 if (SSL3_BUFFER_get_left(&wb
[currbuf
]) == 0
909 && currbuf
< s
->rlayer
.numwpipes
- 1) {
914 if (s
->wbio
!= NULL
) {
915 s
->rwstate
= SSL_WRITING
;
916 i
= BIO_write(s
->wbio
, (char *)
917 &(SSL3_BUFFER_get_buf(&wb
[currbuf
])
918 [SSL3_BUFFER_get_offset(&wb
[currbuf
])]),
919 (unsigned int)SSL3_BUFFER_get_left(&wb
[currbuf
]));
921 SSLerr(SSL_F_SSL3_WRITE_PENDING
, SSL_R_BIO_NOT_SET
);
924 if (i
== SSL3_BUFFER_get_left(&wb
[currbuf
])) {
925 SSL3_BUFFER_set_left(&wb
[currbuf
], 0);
926 SSL3_BUFFER_add_offset(&wb
[currbuf
], i
);
927 if (currbuf
+ 1 < s
->rlayer
.numwpipes
)
929 s
->rwstate
= SSL_NOTHING
;
930 return (s
->rlayer
.wpend_ret
);
932 if (SSL_IS_DTLS(s
)) {
934 * For DTLS, just drop it. That's kind of the whole point in
935 * using a datagram service
937 SSL3_BUFFER_set_left(&wb
[currbuf
], 0);
941 SSL3_BUFFER_add_offset(&wb
[currbuf
], i
);
942 SSL3_BUFFER_add_left(&wb
[currbuf
], -i
);
947 * Return up to 'len' payload bytes received in 'type' records.
948 * 'type' is one of the following:
950 * - SSL3_RT_HANDSHAKE (when ssl3_get_message calls us)
951 * - SSL3_RT_APPLICATION_DATA (when ssl3_read calls us)
952 * - 0 (during a shutdown, no data has to be returned)
954 * If we don't have stored data to work from, read a SSL/TLS record first
955 * (possibly multiple records if we still don't have anything to return).
957 * This function must handle any surprises the peer may have for us, such as
958 * Alert records (e.g. close_notify) or renegotiation requests. ChangeCipherSpec
959 * messages are treated as if they were handshake messages *if* the |recd_type|
960 * argument is non NULL.
961 * Also if record payloads contain fragments too small to process, we store
962 * them until there is enough for the respective protocol (the record protocol
963 * may use arbitrary fragmentation and even interleaving):
964 * Change cipher spec protocol
965 * just 1 byte needed, no need for keeping anything stored
967 * 2 bytes needed (AlertLevel, AlertDescription)
969 * 4 bytes needed (HandshakeType, uint24 length) -- we just have
970 * to detect unexpected Client Hello and Hello Request messages
971 * here, anything else is handled by higher layers
972 * Application data protocol
973 * none of our business
975 int ssl3_read_bytes(SSL
*s
, int type
, int *recvd_type
, unsigned char *buf
,
979 unsigned int n
, curr_rec
, num_recs
, read_bytes
;
982 void (*cb
) (const SSL
*ssl
, int type2
, int val
) = NULL
;
984 rbuf
= &s
->rlayer
.rbuf
;
986 if (!SSL3_BUFFER_is_initialised(rbuf
)) {
987 /* Not initialized yet */
988 if (!ssl3_setup_read_buffer(s
))
992 if ((type
&& (type
!= SSL3_RT_APPLICATION_DATA
)
993 && (type
!= SSL3_RT_HANDSHAKE
)) || (peek
995 SSL3_RT_APPLICATION_DATA
))) {
996 SSLerr(SSL_F_SSL3_READ_BYTES
, ERR_R_INTERNAL_ERROR
);
1000 if ((type
== SSL3_RT_HANDSHAKE
) && (s
->rlayer
.handshake_fragment_len
> 0))
1001 /* (partially) satisfy request from storage */
1003 unsigned char *src
= s
->rlayer
.handshake_fragment
;
1004 unsigned char *dst
= buf
;
1009 while ((len
> 0) && (s
->rlayer
.handshake_fragment_len
> 0)) {
1012 s
->rlayer
.handshake_fragment_len
--;
1015 /* move any remaining fragment bytes: */
1016 for (k
= 0; k
< s
->rlayer
.handshake_fragment_len
; k
++)
1017 s
->rlayer
.handshake_fragment
[k
] = *src
++;
1019 if (recvd_type
!= NULL
)
1020 *recvd_type
= SSL3_RT_HANDSHAKE
;
1026 * Now s->rlayer.handshake_fragment_len == 0 if type == SSL3_RT_HANDSHAKE.
1029 if (!ossl_statem_get_in_handshake(s
) && SSL_in_init(s
)) {
1030 /* type == SSL3_RT_APPLICATION_DATA */
1031 i
= s
->handshake_func(s
);
1035 SSLerr(SSL_F_SSL3_READ_BYTES
, SSL_R_SSL_HANDSHAKE_FAILURE
);
1040 s
->rwstate
= SSL_NOTHING
;
1043 * For each record 'i' up to |num_recs]
1044 * rr[i].type - is the type of record
1045 * rr[i].data, - data
1046 * rr[i].off, - offset into 'data' for next read
1047 * rr[i].length, - number of bytes.
1049 rr
= s
->rlayer
.rrec
;
1050 num_recs
= RECORD_LAYER_get_numrpipes(&s
->rlayer
);
1053 /* get new records if necessary */
1054 if (num_recs
== 0) {
1055 ret
= ssl3_get_record(s
);
1058 num_recs
= RECORD_LAYER_get_numrpipes(&s
->rlayer
);
1059 if (num_recs
== 0) {
1060 /* Shouldn't happen */
1061 al
= SSL_AD_INTERNAL_ERROR
;
1062 SSLerr(SSL_F_SSL3_READ_BYTES
, ERR_R_INTERNAL_ERROR
);
1066 /* Skip over any records we have already read */
1068 curr_rec
< num_recs
&& SSL3_RECORD_is_read(&rr
[curr_rec
]);
1070 if (curr_rec
== num_recs
) {
1071 RECORD_LAYER_set_numrpipes(&s
->rlayer
, 0);
1075 } while (num_recs
== 0);
1079 * Reset the count of consecutive warning alerts if we've got a non-empty
1080 * record that isn't an alert.
1082 if (SSL3_RECORD_get_type(rr
) != SSL3_RT_ALERT
1083 && SSL3_RECORD_get_length(rr
) != 0)
1084 s
->rlayer
.alert_count
= 0;
1086 /* we now have a packet which can be read and processed */
1088 if (s
->s3
->change_cipher_spec
/* set when we receive ChangeCipherSpec,
1089 * reset by ssl3_get_finished */
1090 && (SSL3_RECORD_get_type(rr
) != SSL3_RT_HANDSHAKE
)) {
1091 al
= SSL_AD_UNEXPECTED_MESSAGE
;
1092 SSLerr(SSL_F_SSL3_READ_BYTES
, SSL_R_DATA_BETWEEN_CCS_AND_FINISHED
);
1097 * If the other end has shut down, throw anything we read away (even in
1100 if (s
->shutdown
& SSL_RECEIVED_SHUTDOWN
) {
1101 SSL3_RECORD_set_length(rr
, 0);
1102 s
->rwstate
= SSL_NOTHING
;
1106 if (type
== SSL3_RECORD_get_type(rr
)
1107 || (SSL3_RECORD_get_type(rr
) == SSL3_RT_CHANGE_CIPHER_SPEC
1108 && type
== SSL3_RT_HANDSHAKE
&& recvd_type
!= NULL
)) {
1110 * SSL3_RT_APPLICATION_DATA or
1111 * SSL3_RT_HANDSHAKE or
1112 * SSL3_RT_CHANGE_CIPHER_SPEC
1115 * make sure that we are not getting application data when we are
1116 * doing a handshake for the first time
1118 if (SSL_in_init(s
) && (type
== SSL3_RT_APPLICATION_DATA
) &&
1119 (s
->enc_read_ctx
== NULL
)) {
1120 al
= SSL_AD_UNEXPECTED_MESSAGE
;
1121 SSLerr(SSL_F_SSL3_READ_BYTES
, SSL_R_APP_DATA_IN_HANDSHAKE
);
1125 if (type
== SSL3_RT_HANDSHAKE
1126 && SSL3_RECORD_get_type(rr
) == SSL3_RT_CHANGE_CIPHER_SPEC
1127 && s
->rlayer
.handshake_fragment_len
> 0) {
1128 al
= SSL_AD_UNEXPECTED_MESSAGE
;
1129 SSLerr(SSL_F_SSL3_READ_BYTES
, SSL_R_CCS_RECEIVED_EARLY
);
1133 if (recvd_type
!= NULL
)
1134 *recvd_type
= SSL3_RECORD_get_type(rr
);
1141 if ((unsigned int)len
- read_bytes
> SSL3_RECORD_get_length(rr
))
1142 n
= SSL3_RECORD_get_length(rr
);
1144 n
= (unsigned int)len
- read_bytes
;
1146 memcpy(buf
, &(rr
->data
[rr
->off
]), n
);
1149 /* Mark any zero length record as consumed CVE-2016-6305 */
1150 if (SSL3_RECORD_get_length(rr
) == 0)
1151 SSL3_RECORD_set_read(rr
);
1153 SSL3_RECORD_sub_length(rr
, n
);
1154 SSL3_RECORD_add_off(rr
, n
);
1155 if (SSL3_RECORD_get_length(rr
) == 0) {
1156 s
->rlayer
.rstate
= SSL_ST_READ_HEADER
;
1157 SSL3_RECORD_set_off(rr
, 0);
1158 SSL3_RECORD_set_read(rr
);
1161 if (SSL3_RECORD_get_length(rr
) == 0
1162 || (peek
&& n
== SSL3_RECORD_get_length(rr
))) {
1167 } while (type
== SSL3_RT_APPLICATION_DATA
&& curr_rec
< num_recs
1168 && read_bytes
< (unsigned int)len
);
1169 if (read_bytes
== 0) {
1170 /* We must have read empty records. Get more data */
1173 if (!peek
&& curr_rec
== num_recs
1174 && (s
->mode
& SSL_MODE_RELEASE_BUFFERS
)
1175 && SSL3_BUFFER_get_left(rbuf
) == 0)
1176 ssl3_release_read_buffer(s
);
1181 * If we get here, then type != rr->type; if we have a handshake message,
1182 * then it was unexpected (Hello Request or Client Hello) or invalid (we
1183 * were actually expecting a CCS).
1187 * Lets just double check that we've not got an SSLv2 record
1189 if (rr
->rec_version
== SSL2_VERSION
) {
1191 * Should never happen. ssl3_get_record() should only give us an SSLv2
1192 * record back if this is the first packet and we are looking for an
1193 * initial ClientHello. Therefore |type| should always be equal to
1194 * |rr->type|. If not then something has gone horribly wrong
1196 al
= SSL_AD_INTERNAL_ERROR
;
1197 SSLerr(SSL_F_SSL3_READ_BYTES
, ERR_R_INTERNAL_ERROR
);
1201 if (s
->method
->version
== TLS_ANY_VERSION
1202 && (s
->server
|| rr
->type
!= SSL3_RT_ALERT
)) {
1204 * If we've got this far and still haven't decided on what version
1205 * we're using then this must be a client side alert we're dealing with
1206 * (we don't allow heartbeats yet). We shouldn't be receiving anything
1207 * other than a ClientHello if we are a server.
1209 s
->version
= rr
->rec_version
;
1210 al
= SSL_AD_UNEXPECTED_MESSAGE
;
1211 SSLerr(SSL_F_SSL3_READ_BYTES
, SSL_R_UNEXPECTED_MESSAGE
);
1216 * In case of record types for which we have 'fragment' storage, fill
1217 * that so that we can process the data at a fixed place.
1220 unsigned int dest_maxlen
= 0;
1221 unsigned char *dest
= NULL
;
1222 unsigned int *dest_len
= NULL
;
1224 if (SSL3_RECORD_get_type(rr
) == SSL3_RT_HANDSHAKE
) {
1225 dest_maxlen
= sizeof s
->rlayer
.handshake_fragment
;
1226 dest
= s
->rlayer
.handshake_fragment
;
1227 dest_len
= &s
->rlayer
.handshake_fragment_len
;
1228 } else if (SSL3_RECORD_get_type(rr
) == SSL3_RT_ALERT
) {
1229 dest_maxlen
= sizeof s
->rlayer
.alert_fragment
;
1230 dest
= s
->rlayer
.alert_fragment
;
1231 dest_len
= &s
->rlayer
.alert_fragment_len
;
1234 if (dest_maxlen
> 0) {
1235 n
= dest_maxlen
- *dest_len
; /* available space in 'dest' */
1236 if (SSL3_RECORD_get_length(rr
) < n
)
1237 n
= SSL3_RECORD_get_length(rr
); /* available bytes */
1239 /* now move 'n' bytes: */
1241 dest
[(*dest_len
)++] =
1242 SSL3_RECORD_get_data(rr
)[SSL3_RECORD_get_off(rr
)];
1243 SSL3_RECORD_add_off(rr
, 1);
1244 SSL3_RECORD_add_length(rr
, -1);
1247 if (*dest_len
< dest_maxlen
) {
1248 SSL3_RECORD_set_read(rr
);
1249 goto start
; /* fragment was too small */
1255 * s->rlayer.handshake_fragment_len == 4 iff rr->type == SSL3_RT_HANDSHAKE;
1256 * s->rlayer.alert_fragment_len == 2 iff rr->type == SSL3_RT_ALERT.
1257 * (Possibly rr is 'empty' now, i.e. rr->length may be 0.)
1260 /* If we are a client, check for an incoming 'Hello Request': */
1262 (s
->rlayer
.handshake_fragment_len
>= 4) &&
1263 (s
->rlayer
.handshake_fragment
[0] == SSL3_MT_HELLO_REQUEST
) &&
1264 (s
->session
!= NULL
) && (s
->session
->cipher
!= NULL
)) {
1265 s
->rlayer
.handshake_fragment_len
= 0;
1267 if ((s
->rlayer
.handshake_fragment
[1] != 0) ||
1268 (s
->rlayer
.handshake_fragment
[2] != 0) ||
1269 (s
->rlayer
.handshake_fragment
[3] != 0)) {
1270 al
= SSL_AD_DECODE_ERROR
;
1271 SSLerr(SSL_F_SSL3_READ_BYTES
, SSL_R_BAD_HELLO_REQUEST
);
1275 if (s
->msg_callback
)
1276 s
->msg_callback(0, s
->version
, SSL3_RT_HANDSHAKE
,
1277 s
->rlayer
.handshake_fragment
, 4, s
,
1278 s
->msg_callback_arg
);
1280 if (SSL_is_init_finished(s
) &&
1281 !(s
->s3
->flags
& SSL3_FLAGS_NO_RENEGOTIATE_CIPHERS
) &&
1282 !s
->s3
->renegotiate
) {
1283 ssl3_renegotiate(s
);
1284 if (ssl3_renegotiate_check(s
)) {
1285 i
= s
->handshake_func(s
);
1289 SSLerr(SSL_F_SSL3_READ_BYTES
, SSL_R_SSL_HANDSHAKE_FAILURE
);
1293 if (!(s
->mode
& SSL_MODE_AUTO_RETRY
)) {
1294 if (SSL3_BUFFER_get_left(rbuf
) == 0) {
1295 /* no read-ahead left? */
1298 * In the case where we try to read application data,
1299 * but we trigger an SSL handshake, we return -1 with
1300 * the retry option set. Otherwise renegotiation may
1301 * cause nasty problems in the blocking world
1303 s
->rwstate
= SSL_READING
;
1304 bio
= SSL_get_rbio(s
);
1305 BIO_clear_retry_flags(bio
);
1306 BIO_set_retry_read(bio
);
1313 * we either finished a handshake or ignored the request, now try
1314 * again to obtain the (application) data we were asked for
1319 * If we are a server and get a client hello when renegotiation isn't
1320 * allowed send back a no renegotiation alert and carry on. WARNING:
1321 * experimental code, needs reviewing (steve)
1324 SSL_is_init_finished(s
) &&
1325 !s
->s3
->send_connection_binding
&&
1326 (s
->version
> SSL3_VERSION
) &&
1327 (s
->rlayer
.handshake_fragment_len
>= 4) &&
1328 (s
->rlayer
.handshake_fragment
[0] == SSL3_MT_CLIENT_HELLO
) &&
1329 (s
->session
!= NULL
) && (s
->session
->cipher
!= NULL
) &&
1330 !(s
->ctx
->options
& SSL_OP_ALLOW_UNSAFE_LEGACY_RENEGOTIATION
)) {
1331 SSL3_RECORD_set_length(rr
, 0);
1332 SSL3_RECORD_set_read(rr
);
1333 ssl3_send_alert(s
, SSL3_AL_WARNING
, SSL_AD_NO_RENEGOTIATION
);
1336 if (s
->rlayer
.alert_fragment_len
>= 2) {
1337 int alert_level
= s
->rlayer
.alert_fragment
[0];
1338 int alert_descr
= s
->rlayer
.alert_fragment
[1];
1340 s
->rlayer
.alert_fragment_len
= 0;
1342 if (s
->msg_callback
)
1343 s
->msg_callback(0, s
->version
, SSL3_RT_ALERT
,
1344 s
->rlayer
.alert_fragment
, 2, s
,
1345 s
->msg_callback_arg
);
1347 if (s
->info_callback
!= NULL
)
1348 cb
= s
->info_callback
;
1349 else if (s
->ctx
->info_callback
!= NULL
)
1350 cb
= s
->ctx
->info_callback
;
1353 j
= (alert_level
<< 8) | alert_descr
;
1354 cb(s
, SSL_CB_READ_ALERT
, j
);
1357 if (alert_level
== SSL3_AL_WARNING
) {
1358 s
->s3
->warn_alert
= alert_descr
;
1359 SSL3_RECORD_set_read(rr
);
1361 s
->rlayer
.alert_count
++;
1362 if (s
->rlayer
.alert_count
== MAX_WARN_ALERT_COUNT
) {
1363 al
= SSL_AD_UNEXPECTED_MESSAGE
;
1364 SSLerr(SSL_F_SSL3_READ_BYTES
, SSL_R_TOO_MANY_WARN_ALERTS
);
1368 if (alert_descr
== SSL_AD_CLOSE_NOTIFY
) {
1369 s
->shutdown
|= SSL_RECEIVED_SHUTDOWN
;
1373 * This is a warning but we receive it if we requested
1374 * renegotiation and the peer denied it. Terminate with a fatal
1375 * alert because if application tried to renegotiate it
1376 * presumably had a good reason and expects it to succeed. In
1377 * future we might have a renegotiation where we don't care if
1378 * the peer refused it where we carry on.
1380 else if (alert_descr
== SSL_AD_NO_RENEGOTIATION
) {
1381 al
= SSL_AD_HANDSHAKE_FAILURE
;
1382 SSLerr(SSL_F_SSL3_READ_BYTES
, SSL_R_NO_RENEGOTIATION
);
1385 #ifdef SSL_AD_MISSING_SRP_USERNAME
1386 else if (alert_descr
== SSL_AD_MISSING_SRP_USERNAME
)
1389 } else if (alert_level
== SSL3_AL_FATAL
) {
1392 s
->rwstate
= SSL_NOTHING
;
1393 s
->s3
->fatal_alert
= alert_descr
;
1394 SSLerr(SSL_F_SSL3_READ_BYTES
, SSL_AD_REASON_OFFSET
+ alert_descr
);
1395 BIO_snprintf(tmp
, sizeof tmp
, "%d", alert_descr
);
1396 ERR_add_error_data(2, "SSL alert number ", tmp
);
1397 s
->shutdown
|= SSL_RECEIVED_SHUTDOWN
;
1398 SSL3_RECORD_set_read(rr
);
1399 SSL_CTX_remove_session(s
->session_ctx
, s
->session
);
1402 al
= SSL_AD_ILLEGAL_PARAMETER
;
1403 SSLerr(SSL_F_SSL3_READ_BYTES
, SSL_R_UNKNOWN_ALERT_TYPE
);
1410 if (s
->shutdown
& SSL_SENT_SHUTDOWN
) { /* but we have not received a
1412 s
->rwstate
= SSL_NOTHING
;
1413 SSL3_RECORD_set_length(rr
, 0);
1414 SSL3_RECORD_set_read(rr
);
1418 if (SSL3_RECORD_get_type(rr
) == SSL3_RT_CHANGE_CIPHER_SPEC
) {
1419 al
= SSL_AD_UNEXPECTED_MESSAGE
;
1420 SSLerr(SSL_F_SSL3_READ_BYTES
, SSL_R_CCS_RECEIVED_EARLY
);
1425 * Unexpected handshake message (Client Hello, or protocol violation)
1427 if ((s
->rlayer
.handshake_fragment_len
>= 4)
1428 && !ossl_statem_get_in_handshake(s
)) {
1429 if (SSL_is_init_finished(s
) &&
1430 !(s
->s3
->flags
& SSL3_FLAGS_NO_RENEGOTIATE_CIPHERS
)) {
1431 ossl_statem_set_in_init(s
, 1);
1435 i
= s
->handshake_func(s
);
1439 SSLerr(SSL_F_SSL3_READ_BYTES
, SSL_R_SSL_HANDSHAKE_FAILURE
);
1443 if (!(s
->mode
& SSL_MODE_AUTO_RETRY
)) {
1444 if (SSL3_BUFFER_get_left(rbuf
) == 0) {
1445 /* no read-ahead left? */
1448 * In the case where we try to read application data, but we
1449 * trigger an SSL handshake, we return -1 with the retry
1450 * option set. Otherwise renegotiation may cause nasty
1451 * problems in the blocking world
1453 s
->rwstate
= SSL_READING
;
1454 bio
= SSL_get_rbio(s
);
1455 BIO_clear_retry_flags(bio
);
1456 BIO_set_retry_read(bio
);
1463 switch (SSL3_RECORD_get_type(rr
)) {
1466 * TLS up to v1.1 just ignores unknown message types: TLS v1.2 give
1467 * an unexpected message alert.
1469 if (s
->version
>= TLS1_VERSION
&& s
->version
<= TLS1_1_VERSION
) {
1470 SSL3_RECORD_set_length(rr
, 0);
1471 SSL3_RECORD_set_read(rr
);
1474 al
= SSL_AD_UNEXPECTED_MESSAGE
;
1475 SSLerr(SSL_F_SSL3_READ_BYTES
, SSL_R_UNEXPECTED_RECORD
);
1477 case SSL3_RT_CHANGE_CIPHER_SPEC
:
1479 case SSL3_RT_HANDSHAKE
:
1481 * we already handled all of these, with the possible exception of
1482 * SSL3_RT_HANDSHAKE when ossl_statem_get_in_handshake(s) is true, but
1483 * that should not happen when type != rr->type
1485 al
= SSL_AD_UNEXPECTED_MESSAGE
;
1486 SSLerr(SSL_F_SSL3_READ_BYTES
, ERR_R_INTERNAL_ERROR
);
1488 case SSL3_RT_APPLICATION_DATA
:
1490 * At this point, we were expecting handshake data, but have
1491 * application data. If the library was running inside ssl3_read()
1492 * (i.e. in_read_app_data is set) and it makes sense to read
1493 * application data at this point (session renegotiation not yet
1494 * started), we will indulge it.
1496 if (ossl_statem_app_data_allowed(s
)) {
1497 s
->s3
->in_read_app_data
= 2;
1500 al
= SSL_AD_UNEXPECTED_MESSAGE
;
1501 SSLerr(SSL_F_SSL3_READ_BYTES
, SSL_R_UNEXPECTED_RECORD
);
1508 ssl3_send_alert(s
, SSL3_AL_FATAL
, al
);
1512 void ssl3_record_sequence_update(unsigned char *seq
)
1516 for (i
= 7; i
>= 0; i
--) {
1524 * Returns true if the current rrec was sent in SSLv2 backwards compatible
1525 * format and false otherwise.
1527 int RECORD_LAYER_is_sslv2_record(RECORD_LAYER
*rl
)
1529 return SSL3_RECORD_is_sslv2_record(&rl
->rrec
[0]);
1533 * Returns the length in bytes of the current rrec
1535 unsigned int RECORD_LAYER_get_rrec_length(RECORD_LAYER
*rl
)
1537 return SSL3_RECORD_get_length(&rl
->rrec
[0]);