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
:
180 int ssl3_read_n(SSL
*s
, int n
, int max
, int extend
, int clearold
)
183 * If extend == 0, obtain new n-byte packet; if extend == 1, increase
184 * packet by another n bytes. The packet will be in the sub-array of
185 * s->s3->rbuf.buf specified by s->packet and s->packet_length. (If
186 * s->rlayer.read_ahead is set, 'max' bytes may be stored in rbuf [plus
187 * s->packet_length bytes if extend == 1].)
188 * if clearold == 1, move the packet to the start of the buffer; if
189 * clearold == 0 then leave any old packets where they were
199 rb
= &s
->rlayer
.rbuf
;
201 if (!ssl3_setup_read_buffer(s
))
205 #if defined(SSL3_ALIGN_PAYLOAD) && SSL3_ALIGN_PAYLOAD!=0
206 align
= (size_t)rb
->buf
+ SSL3_RT_HEADER_LENGTH
;
207 align
= SSL3_ALIGN_PAYLOAD
- 1 - ((align
- 1) % SSL3_ALIGN_PAYLOAD
);
211 /* start with empty packet ... */
214 else if (align
!= 0 && left
>= SSL3_RT_HEADER_LENGTH
) {
216 * check if next packet length is large enough to justify payload
219 pkt
= rb
->buf
+ rb
->offset
;
220 if (pkt
[0] == SSL3_RT_APPLICATION_DATA
221 && (pkt
[3] << 8 | pkt
[4]) >= 128) {
223 * Note that even if packet is corrupted and its length field
224 * is insane, we can only be led to wrong decision about
225 * whether memmove will occur or not. Header values has no
226 * effect on memmove arguments and therefore no buffer
227 * overrun can be triggered.
229 memmove(rb
->buf
+ align
, pkt
, left
);
233 s
->rlayer
.packet
= rb
->buf
+ rb
->offset
;
234 s
->rlayer
.packet_length
= 0;
235 /* ... now we can act as if 'extend' was set */
239 * For DTLS/UDP reads should not span multiple packets because the read
240 * operation returns the whole packet at once (as long as it fits into
243 if (SSL_IS_DTLS(s
)) {
244 if (left
== 0 && extend
)
246 if (left
> 0 && n
> left
)
250 /* if there is enough in the buffer from a previous read, take some */
252 s
->rlayer
.packet_length
+= n
;
258 /* else we need to read more data */
260 len
= s
->rlayer
.packet_length
;
261 pkt
= rb
->buf
+ align
;
263 * Move any available bytes to front of buffer: 'len' bytes already
264 * pointed to by 'packet', 'left' extra ones at the end
266 if (s
->rlayer
.packet
!= pkt
&& clearold
== 1) { /* len > 0 */
267 memmove(pkt
, s
->rlayer
.packet
, len
+ left
);
268 s
->rlayer
.packet
= pkt
;
269 rb
->offset
= len
+ align
;
272 if (n
> (int)(rb
->len
- rb
->offset
)) { /* does not happen */
273 SSLerr(SSL_F_SSL3_READ_N
, ERR_R_INTERNAL_ERROR
);
277 /* We always act like read_ahead is set for DTLS */
278 if (!s
->rlayer
.read_ahead
&& !SSL_IS_DTLS(s
))
279 /* ignore max parameter */
284 if (max
> (int)(rb
->len
- rb
->offset
))
285 max
= rb
->len
- rb
->offset
;
290 * Now we have len+left bytes at the front of s->s3->rbuf.buf and
291 * need to read in more until we have len+n (up to len+max if
296 if (s
->rbio
!= NULL
) {
297 s
->rwstate
= SSL_READING
;
298 i
= BIO_read(s
->rbio
, pkt
+ len
+ left
, max
- left
);
300 SSLerr(SSL_F_SSL3_READ_N
, SSL_R_READ_BIO_NOT_SET
);
306 if (s
->mode
& SSL_MODE_RELEASE_BUFFERS
&& !SSL_IS_DTLS(s
))
308 ssl3_release_read_buffer(s
);
313 * reads should *never* span multiple packets for DTLS because the
314 * underlying transport protocol is message oriented as opposed to
315 * byte oriented as in the TLS case.
317 if (SSL_IS_DTLS(s
)) {
319 n
= left
; /* makes the while condition false */
323 /* done reading, now the book-keeping */
326 s
->rlayer
.packet_length
+= n
;
327 s
->rwstate
= SSL_NOTHING
;
332 * Call this to write data in records of type 'type' It will return <= 0 if
333 * not all data has been sent or non-blocking IO.
335 int ssl3_write_bytes(SSL
*s
, int type
, const void *buf_
, int len
)
337 const unsigned char *buf
= buf_
;
339 unsigned int n
, split_send_fragment
, maxpipes
;
340 #if !defined(OPENSSL_NO_MULTIBLOCK) && EVP_CIPH_FLAG_TLS1_1_MULTIBLOCK
341 unsigned int max_send_fragment
, nw
;
342 unsigned int u_len
= (unsigned int)len
;
344 SSL3_BUFFER
*wb
= &s
->rlayer
.wbuf
[0];
348 SSLerr(SSL_F_SSL3_WRITE_BYTES
, SSL_R_SSL_NEGATIVE_LENGTH
);
352 s
->rwstate
= SSL_NOTHING
;
353 tot
= s
->rlayer
.wnum
;
355 * ensure that if we end up with a smaller value of data to write out
356 * than the the original len from a write which didn't complete for
357 * non-blocking I/O and also somehow ended up avoiding the check for
358 * this in ssl3_write_pending/SSL_R_BAD_WRITE_RETRY as it must never be
359 * possible to end up with (len-tot) as a large number that will then
360 * promptly send beyond the end of the users buffer ... so we trap and
361 * report the error in a way the user will notice
363 if ((unsigned int)len
< s
->rlayer
.wnum
) {
364 SSLerr(SSL_F_SSL3_WRITE_BYTES
, SSL_R_BAD_LENGTH
);
370 if (SSL_in_init(s
) && !ossl_statem_get_in_handshake(s
)) {
371 i
= s
->handshake_func(s
);
375 SSLerr(SSL_F_SSL3_WRITE_BYTES
, SSL_R_SSL_HANDSHAKE_FAILURE
);
381 * first check if there is a SSL3_BUFFER still being written out. This
382 * will happen with non blocking IO
385 i
= ssl3_write_pending(s
, type
, &buf
[tot
], s
->rlayer
.wpend_tot
);
387 /* XXX should we ssl3_release_write_buffer if i<0? */
388 s
->rlayer
.wnum
= tot
;
391 tot
+= i
; /* this might be last fragment */
393 #if !defined(OPENSSL_NO_MULTIBLOCK) && EVP_CIPH_FLAG_TLS1_1_MULTIBLOCK
395 * Depending on platform multi-block can deliver several *times*
396 * better performance. Downside is that it has to allocate
397 * jumbo buffer to accommodate up to 8 records, but the
398 * compromise is considered worthy.
400 if (type
== SSL3_RT_APPLICATION_DATA
&&
401 u_len
>= 4 * (max_send_fragment
= s
->max_send_fragment
) &&
402 s
->compress
== NULL
&& s
->msg_callback
== NULL
&&
403 !SSL_USE_ETM(s
) && SSL_USE_EXPLICIT_IV(s
) &&
404 EVP_CIPHER_flags(EVP_CIPHER_CTX_cipher(s
->enc_write_ctx
)) &
405 EVP_CIPH_FLAG_TLS1_1_MULTIBLOCK
) {
406 unsigned char aad
[13];
407 EVP_CTRL_TLS1_1_MULTIBLOCK_PARAM mb_param
;
410 /* minimize address aliasing conflicts */
411 if ((max_send_fragment
& 0xfff) == 0)
412 max_send_fragment
-= 512;
414 if (tot
== 0 || wb
->buf
== NULL
) { /* allocate jumbo buffer */
415 ssl3_release_write_buffer(s
);
417 packlen
= EVP_CIPHER_CTX_ctrl(s
->enc_write_ctx
,
418 EVP_CTRL_TLS1_1_MULTIBLOCK_MAX_BUFSIZE
,
419 max_send_fragment
, NULL
);
421 if (u_len
>= 8 * max_send_fragment
)
426 if (!ssl3_setup_write_buffer(s
, 1, packlen
)) {
427 SSLerr(SSL_F_SSL3_WRITE_BYTES
, ERR_R_MALLOC_FAILURE
);
430 } else if (tot
== len
) { /* done? */
431 /* free jumbo buffer */
432 ssl3_release_write_buffer(s
);
438 if (n
< 4 * max_send_fragment
) {
439 /* free jumbo buffer */
440 ssl3_release_write_buffer(s
);
444 if (s
->s3
->alert_dispatch
) {
445 i
= s
->method
->ssl_dispatch_alert(s
);
447 s
->rlayer
.wnum
= tot
;
452 if (n
>= 8 * max_send_fragment
)
453 nw
= max_send_fragment
* (mb_param
.interleave
= 8);
455 nw
= max_send_fragment
* (mb_param
.interleave
= 4);
457 memcpy(aad
, s
->rlayer
.write_sequence
, 8);
459 aad
[9] = (unsigned char)(s
->version
>> 8);
460 aad
[10] = (unsigned char)(s
->version
);
467 packlen
= EVP_CIPHER_CTX_ctrl(s
->enc_write_ctx
,
468 EVP_CTRL_TLS1_1_MULTIBLOCK_AAD
,
469 sizeof(mb_param
), &mb_param
);
471 if (packlen
<= 0 || packlen
> (int)wb
->len
) { /* never happens */
472 /* free jumbo buffer */
473 ssl3_release_write_buffer(s
);
477 mb_param
.out
= wb
->buf
;
478 mb_param
.inp
= &buf
[tot
];
481 if (EVP_CIPHER_CTX_ctrl(s
->enc_write_ctx
,
482 EVP_CTRL_TLS1_1_MULTIBLOCK_ENCRYPT
,
483 sizeof(mb_param
), &mb_param
) <= 0)
486 s
->rlayer
.write_sequence
[7] += mb_param
.interleave
;
487 if (s
->rlayer
.write_sequence
[7] < mb_param
.interleave
) {
489 while (j
>= 0 && (++s
->rlayer
.write_sequence
[j
--]) == 0) ;
495 s
->rlayer
.wpend_tot
= nw
;
496 s
->rlayer
.wpend_buf
= &buf
[tot
];
497 s
->rlayer
.wpend_type
= type
;
498 s
->rlayer
.wpend_ret
= nw
;
500 i
= ssl3_write_pending(s
, type
, &buf
[tot
], nw
);
502 if (i
< 0 && (!s
->wbio
|| !BIO_should_retry(s
->wbio
))) {
503 /* free jumbo buffer */
504 ssl3_release_write_buffer(s
);
506 s
->rlayer
.wnum
= tot
;
510 /* free jumbo buffer */
511 ssl3_release_write_buffer(s
);
519 if (tot
== len
) { /* done? */
520 if (s
->mode
& SSL_MODE_RELEASE_BUFFERS
&& !SSL_IS_DTLS(s
))
521 ssl3_release_write_buffer(s
);
528 split_send_fragment
= s
->split_send_fragment
;
530 * If max_pipelines is 0 then this means "undefined" and we default to
531 * 1 pipeline. Similarly if the cipher does not support pipelined
532 * processing then we also only use 1 pipeline, or if we're not using
535 maxpipes
= s
->max_pipelines
;
536 if (maxpipes
> SSL_MAX_PIPELINES
) {
538 * We should have prevented this when we set max_pipelines so we
541 SSLerr(SSL_F_SSL3_WRITE_BYTES
, ERR_R_INTERNAL_ERROR
);
545 || s
->enc_write_ctx
== NULL
546 || !(EVP_CIPHER_flags(EVP_CIPHER_CTX_cipher(s
->enc_write_ctx
))
547 & EVP_CIPH_FLAG_PIPELINE
)
548 || !SSL_USE_EXPLICIT_IV(s
))
550 if (s
->max_send_fragment
== 0 || split_send_fragment
> s
->max_send_fragment
551 || split_send_fragment
== 0) {
553 * We should have prevented this when we set the split and max send
554 * fragments so we shouldn't get here
556 SSLerr(SSL_F_SSL3_WRITE_BYTES
, ERR_R_INTERNAL_ERROR
);
561 unsigned int pipelens
[SSL_MAX_PIPELINES
], tmppipelen
, remain
;
562 unsigned int numpipes
, j
;
567 numpipes
= ((n
- 1) / split_send_fragment
) + 1;
568 if (numpipes
> maxpipes
)
571 if (n
/ numpipes
>= s
->max_send_fragment
) {
573 * We have enough data to completely fill all available
576 for (j
= 0; j
< numpipes
; j
++) {
577 pipelens
[j
] = s
->max_send_fragment
;
580 /* We can partially fill all available pipelines */
581 tmppipelen
= n
/ numpipes
;
582 remain
= n
% numpipes
;
583 for (j
= 0; j
< numpipes
; j
++) {
584 pipelens
[j
] = tmppipelen
;
590 i
= do_ssl3_write(s
, type
, &(buf
[tot
]), pipelens
, numpipes
, 0);
592 /* XXX should we ssl3_release_write_buffer if i<0? */
593 s
->rlayer
.wnum
= tot
;
598 (type
== SSL3_RT_APPLICATION_DATA
&&
599 (s
->mode
& SSL_MODE_ENABLE_PARTIAL_WRITE
))) {
601 * next chunk of data should get another prepended empty fragment
602 * in ciphersuites with known-IV weakness:
604 s
->s3
->empty_fragment_done
= 0;
606 if ((i
== (int)n
) && s
->mode
& SSL_MODE_RELEASE_BUFFERS
&&
608 ssl3_release_write_buffer(s
);
618 int do_ssl3_write(SSL
*s
, int type
, const unsigned char *buf
,
619 unsigned int *pipelens
, unsigned int numpipes
,
620 int create_empty_fragment
)
622 unsigned char *outbuf
[SSL_MAX_PIPELINES
], *plen
[SSL_MAX_PIPELINES
];
623 SSL3_RECORD wr
[SSL_MAX_PIPELINES
];
624 int i
, mac_size
, clear
= 0;
630 unsigned int totlen
= 0;
633 for (j
= 0; j
< numpipes
; j
++)
634 totlen
+= pipelens
[j
];
636 * first check if there is a SSL3_BUFFER still being written out. This
637 * will happen with non blocking IO
639 if (RECORD_LAYER_write_pending(&s
->rlayer
))
640 return (ssl3_write_pending(s
, type
, buf
, totlen
));
642 /* If we have an alert to send, lets send it */
643 if (s
->s3
->alert_dispatch
) {
644 i
= s
->method
->ssl_dispatch_alert(s
);
647 /* if it went, fall through and send more stuff */
650 if (s
->rlayer
.numwpipes
< numpipes
)
651 if (!ssl3_setup_write_buffer(s
, numpipes
, 0))
654 if (totlen
== 0 && !create_empty_fragment
)
659 if ((sess
== NULL
) ||
660 (s
->enc_write_ctx
== NULL
) || (EVP_MD_CTX_md(s
->write_hash
) == NULL
)) {
661 clear
= s
->enc_write_ctx
? 0 : 1; /* must be AEAD cipher */
664 mac_size
= EVP_MD_CTX_size(s
->write_hash
);
670 * 'create_empty_fragment' is true only when this function calls itself
672 if (!clear
&& !create_empty_fragment
&& !s
->s3
->empty_fragment_done
) {
674 * countermeasure against known-IV weakness in CBC ciphersuites (see
675 * http://www.openssl.org/~bodo/tls-cbc.txt)
678 if (s
->s3
->need_empty_fragments
&& type
== SSL3_RT_APPLICATION_DATA
) {
680 * recursive function call with 'create_empty_fragment' set; this
681 * prepares and buffers the data for an empty fragment (these
682 * 'prefix_len' bytes are sent out later together with the actual
685 unsigned int tmppipelen
= 0;
687 prefix_len
= do_ssl3_write(s
, type
, buf
, &tmppipelen
, 1, 1);
692 (SSL3_RT_HEADER_LENGTH
+ SSL3_RT_SEND_MAX_ENCRYPTED_OVERHEAD
)) {
693 /* insufficient space */
694 SSLerr(SSL_F_DO_SSL3_WRITE
, ERR_R_INTERNAL_ERROR
);
699 s
->s3
->empty_fragment_done
= 1;
702 if (create_empty_fragment
) {
703 wb
= &s
->rlayer
.wbuf
[0];
704 #if defined(SSL3_ALIGN_PAYLOAD) && SSL3_ALIGN_PAYLOAD!=0
706 * extra fragment would be couple of cipher blocks, which would be
707 * multiple of SSL3_ALIGN_PAYLOAD, so if we want to align the real
708 * payload, then we can just pretend we simply have two headers.
710 align
= (size_t)SSL3_BUFFER_get_buf(wb
) + 2 * SSL3_RT_HEADER_LENGTH
;
711 align
= SSL3_ALIGN_PAYLOAD
- 1 - ((align
- 1) % SSL3_ALIGN_PAYLOAD
);
713 outbuf
[0] = SSL3_BUFFER_get_buf(wb
) + align
;
714 SSL3_BUFFER_set_offset(wb
, align
);
715 } else if (prefix_len
) {
716 wb
= &s
->rlayer
.wbuf
[0];
717 outbuf
[0] = SSL3_BUFFER_get_buf(wb
) + SSL3_BUFFER_get_offset(wb
)
720 for (j
= 0; j
< numpipes
; j
++) {
721 wb
= &s
->rlayer
.wbuf
[j
];
722 #if defined(SSL3_ALIGN_PAYLOAD) && SSL3_ALIGN_PAYLOAD!=0
723 align
= (size_t)SSL3_BUFFER_get_buf(wb
) + SSL3_RT_HEADER_LENGTH
;
724 align
= SSL3_ALIGN_PAYLOAD
- 1 - ((align
- 1) % SSL3_ALIGN_PAYLOAD
);
726 outbuf
[j
] = SSL3_BUFFER_get_buf(wb
) + align
;
727 SSL3_BUFFER_set_offset(wb
, align
);
731 /* Explicit IV length, block ciphers appropriate version flag */
732 if (s
->enc_write_ctx
&& SSL_USE_EXPLICIT_IV(s
)) {
733 int mode
= EVP_CIPHER_CTX_mode(s
->enc_write_ctx
);
734 if (mode
== EVP_CIPH_CBC_MODE
) {
735 eivlen
= EVP_CIPHER_CTX_iv_length(s
->enc_write_ctx
);
739 /* Need explicit part of IV for GCM mode */
740 else if (mode
== EVP_CIPH_GCM_MODE
)
741 eivlen
= EVP_GCM_TLS_EXPLICIT_IV_LEN
;
742 else if (mode
== EVP_CIPH_CCM_MODE
)
743 eivlen
= EVP_CCM_TLS_EXPLICIT_IV_LEN
;
750 /* Clear our SSL3_RECORD structures */
751 memset(wr
, 0, sizeof wr
);
752 for (j
= 0; j
< numpipes
; j
++) {
753 /* write the header */
754 *(outbuf
[j
]++) = type
& 0xff;
755 SSL3_RECORD_set_type(&wr
[j
], type
);
757 *(outbuf
[j
]++) = (s
->version
>> 8);
759 * Some servers hang if initial client hello is larger than 256 bytes
760 * and record version number > TLS 1.0
762 if (SSL_get_state(s
) == TLS_ST_CW_CLNT_HELLO
763 && !s
->renegotiate
&& TLS1_get_version(s
) > TLS1_VERSION
)
764 *(outbuf
[j
]++) = 0x1;
766 *(outbuf
[j
]++) = s
->version
& 0xff;
768 /* field where we are to write out packet length */
772 /* lets setup the record stuff. */
773 SSL3_RECORD_set_data(&wr
[j
], outbuf
[j
] + eivlen
);
774 SSL3_RECORD_set_length(&wr
[j
], (int)pipelens
[j
]);
775 SSL3_RECORD_set_input(&wr
[j
], (unsigned char *)&buf
[totlen
]);
776 totlen
+= pipelens
[j
];
779 * we now 'read' from wr->input, wr->length bytes into wr->data
782 /* first we compress */
783 if (s
->compress
!= NULL
) {
784 if (!ssl3_do_compress(s
, &wr
[j
])) {
785 SSLerr(SSL_F_DO_SSL3_WRITE
, SSL_R_COMPRESSION_FAILURE
);
789 memcpy(wr
[j
].data
, wr
[j
].input
, wr
[j
].length
);
790 SSL3_RECORD_reset_input(&wr
[j
]);
794 * we should still have the output to wr->data and the input from
795 * wr->input. Length should be wr->length. wr->data still points in the
799 if (!SSL_USE_ETM(s
) && mac_size
!= 0) {
800 if (s
->method
->ssl3_enc
->mac(s
, &wr
[j
],
801 &(outbuf
[j
][wr
[j
].length
+ eivlen
]),
804 SSL3_RECORD_add_length(&wr
[j
], mac_size
);
807 SSL3_RECORD_set_data(&wr
[j
], outbuf
[j
]);
808 SSL3_RECORD_reset_input(&wr
[j
]);
812 * if (RAND_pseudo_bytes(p, eivlen) <= 0) goto err;
814 SSL3_RECORD_add_length(&wr
[j
], eivlen
);
818 if (s
->method
->ssl3_enc
->enc(s
, wr
, numpipes
, 1) < 1)
821 for (j
= 0; j
< numpipes
; j
++) {
822 if (SSL_USE_ETM(s
) && mac_size
!= 0) {
823 if (s
->method
->ssl3_enc
->mac(s
, &wr
[j
],
824 outbuf
[j
] + wr
[j
].length
, 1) < 0)
826 SSL3_RECORD_add_length(&wr
[j
], mac_size
);
829 /* record length after mac and block padding */
830 s2n(SSL3_RECORD_get_length(&wr
[j
]), plen
[j
]);
833 s
->msg_callback(1, 0, SSL3_RT_HEADER
, plen
[j
] - 5, 5, s
,
834 s
->msg_callback_arg
);
837 * we should now have wr->data pointing to the encrypted data, which is
840 SSL3_RECORD_set_type(&wr
[j
], type
); /* not needed but helps for
842 SSL3_RECORD_add_length(&wr
[j
], SSL3_RT_HEADER_LENGTH
);
844 if (create_empty_fragment
) {
846 * we are in a recursive call; just return the length, don't write
850 /* We should never be pipelining an empty fragment!! */
851 SSLerr(SSL_F_DO_SSL3_WRITE
, ERR_R_INTERNAL_ERROR
);
854 return SSL3_RECORD_get_length(wr
);
857 /* now let's set up wb */
858 SSL3_BUFFER_set_left(&s
->rlayer
.wbuf
[j
],
859 prefix_len
+ SSL3_RECORD_get_length(&wr
[j
]));
863 * memorize arguments so that ssl3_write_pending can detect bad write
866 s
->rlayer
.wpend_tot
= totlen
;
867 s
->rlayer
.wpend_buf
= buf
;
868 s
->rlayer
.wpend_type
= type
;
869 s
->rlayer
.wpend_ret
= totlen
;
871 /* we now just need to write the buffer */
872 return ssl3_write_pending(s
, type
, buf
, totlen
);
877 /* if s->s3->wbuf.left != 0, we need to call this */
878 int ssl3_write_pending(SSL
*s
, int type
, const unsigned char *buf
,
882 SSL3_BUFFER
*wb
= s
->rlayer
.wbuf
;
883 unsigned int currbuf
= 0;
886 if ((s
->rlayer
.wpend_tot
> (int)len
)
887 || ((s
->rlayer
.wpend_buf
!= buf
) &&
888 !(s
->mode
& SSL_MODE_ACCEPT_MOVING_WRITE_BUFFER
))
889 || (s
->rlayer
.wpend_type
!= type
)) {
890 SSLerr(SSL_F_SSL3_WRITE_PENDING
, SSL_R_BAD_WRITE_RETRY
);
895 /* Loop until we find a buffer we haven't written out yet */
896 if (SSL3_BUFFER_get_left(&wb
[currbuf
]) == 0
897 && currbuf
< s
->rlayer
.numwpipes
- 1) {
902 if (s
->wbio
!= NULL
) {
903 s
->rwstate
= SSL_WRITING
;
904 i
= BIO_write(s
->wbio
, (char *)
905 &(SSL3_BUFFER_get_buf(&wb
[currbuf
])
906 [SSL3_BUFFER_get_offset(&wb
[currbuf
])]),
907 (unsigned int)SSL3_BUFFER_get_left(&wb
[currbuf
]));
909 SSLerr(SSL_F_SSL3_WRITE_PENDING
, SSL_R_BIO_NOT_SET
);
912 if (i
== SSL3_BUFFER_get_left(&wb
[currbuf
])) {
913 SSL3_BUFFER_set_left(&wb
[currbuf
], 0);
914 SSL3_BUFFER_add_offset(&wb
[currbuf
], i
);
915 if (currbuf
+ 1 < s
->rlayer
.numwpipes
)
917 s
->rwstate
= SSL_NOTHING
;
918 return (s
->rlayer
.wpend_ret
);
920 if (SSL_IS_DTLS(s
)) {
922 * For DTLS, just drop it. That's kind of the whole point in
923 * using a datagram service
925 SSL3_BUFFER_set_left(&wb
[currbuf
], 0);
929 SSL3_BUFFER_add_offset(&wb
[currbuf
], i
);
930 SSL3_BUFFER_add_left(&wb
[currbuf
], -i
);
935 * Return up to 'len' payload bytes received in 'type' records.
936 * 'type' is one of the following:
938 * - SSL3_RT_HANDSHAKE (when ssl3_get_message calls us)
939 * - SSL3_RT_APPLICATION_DATA (when ssl3_read calls us)
940 * - 0 (during a shutdown, no data has to be returned)
942 * If we don't have stored data to work from, read a SSL/TLS record first
943 * (possibly multiple records if we still don't have anything to return).
945 * This function must handle any surprises the peer may have for us, such as
946 * Alert records (e.g. close_notify) or renegotiation requests. ChangeCipherSpec
947 * messages are treated as if they were handshake messages *if* the |recd_type|
948 * argument is non NULL.
949 * Also if record payloads contain fragments too small to process, we store
950 * them until there is enough for the respective protocol (the record protocol
951 * may use arbitrary fragmentation and even interleaving):
952 * Change cipher spec protocol
953 * just 1 byte needed, no need for keeping anything stored
955 * 2 bytes needed (AlertLevel, AlertDescription)
957 * 4 bytes needed (HandshakeType, uint24 length) -- we just have
958 * to detect unexpected Client Hello and Hello Request messages
959 * here, anything else is handled by higher layers
960 * Application data protocol
961 * none of our business
963 int ssl3_read_bytes(SSL
*s
, int type
, int *recvd_type
, unsigned char *buf
,
967 unsigned int n
, curr_rec
, num_recs
, read_bytes
;
970 void (*cb
) (const SSL
*ssl
, int type2
, int val
) = NULL
;
972 rbuf
= &s
->rlayer
.rbuf
;
974 if (!SSL3_BUFFER_is_initialised(rbuf
)) {
975 /* Not initialized yet */
976 if (!ssl3_setup_read_buffer(s
))
980 if ((type
&& (type
!= SSL3_RT_APPLICATION_DATA
)
981 && (type
!= SSL3_RT_HANDSHAKE
)) || (peek
983 SSL3_RT_APPLICATION_DATA
))) {
984 SSLerr(SSL_F_SSL3_READ_BYTES
, ERR_R_INTERNAL_ERROR
);
988 if ((type
== SSL3_RT_HANDSHAKE
) && (s
->rlayer
.handshake_fragment_len
> 0))
989 /* (partially) satisfy request from storage */
991 unsigned char *src
= s
->rlayer
.handshake_fragment
;
992 unsigned char *dst
= buf
;
997 while ((len
> 0) && (s
->rlayer
.handshake_fragment_len
> 0)) {
1000 s
->rlayer
.handshake_fragment_len
--;
1003 /* move any remaining fragment bytes: */
1004 for (k
= 0; k
< s
->rlayer
.handshake_fragment_len
; k
++)
1005 s
->rlayer
.handshake_fragment
[k
] = *src
++;
1007 if (recvd_type
!= NULL
)
1008 *recvd_type
= SSL3_RT_HANDSHAKE
;
1014 * Now s->rlayer.handshake_fragment_len == 0 if type == SSL3_RT_HANDSHAKE.
1017 if (!ossl_statem_get_in_handshake(s
) && SSL_in_init(s
)) {
1018 /* type == SSL3_RT_APPLICATION_DATA */
1019 i
= s
->handshake_func(s
);
1023 SSLerr(SSL_F_SSL3_READ_BYTES
, SSL_R_SSL_HANDSHAKE_FAILURE
);
1028 s
->rwstate
= SSL_NOTHING
;
1031 * For each record 'i' up to |num_recs]
1032 * rr[i].type - is the type of record
1033 * rr[i].data, - data
1034 * rr[i].off, - offset into 'data' for next read
1035 * rr[i].length, - number of bytes.
1037 rr
= s
->rlayer
.rrec
;
1038 num_recs
= RECORD_LAYER_get_numrpipes(&s
->rlayer
);
1041 /* get new records if necessary */
1042 if (num_recs
== 0) {
1043 ret
= ssl3_get_record(s
);
1046 num_recs
= RECORD_LAYER_get_numrpipes(&s
->rlayer
);
1047 if (num_recs
== 0) {
1048 /* Shouldn't happen */
1049 al
= SSL_AD_INTERNAL_ERROR
;
1050 SSLerr(SSL_F_SSL3_READ_BYTES
, ERR_R_INTERNAL_ERROR
);
1054 /* Skip over any records we have already read */
1056 curr_rec
< num_recs
&& SSL3_RECORD_is_read(&rr
[curr_rec
]);
1058 if (curr_rec
== num_recs
) {
1059 RECORD_LAYER_set_numrpipes(&s
->rlayer
, 0);
1063 } while (num_recs
== 0);
1066 /* we now have a packet which can be read and processed */
1068 if (s
->s3
->change_cipher_spec
/* set when we receive ChangeCipherSpec,
1069 * reset by ssl3_get_finished */
1070 && (SSL3_RECORD_get_type(rr
) != SSL3_RT_HANDSHAKE
)) {
1071 al
= SSL_AD_UNEXPECTED_MESSAGE
;
1072 SSLerr(SSL_F_SSL3_READ_BYTES
, SSL_R_DATA_BETWEEN_CCS_AND_FINISHED
);
1077 * If the other end has shut down, throw anything we read away (even in
1080 if (s
->shutdown
& SSL_RECEIVED_SHUTDOWN
) {
1081 SSL3_RECORD_set_length(rr
, 0);
1082 s
->rwstate
= SSL_NOTHING
;
1086 if (type
== SSL3_RECORD_get_type(rr
)
1087 || (SSL3_RECORD_get_type(rr
) == SSL3_RT_CHANGE_CIPHER_SPEC
1088 && type
== SSL3_RT_HANDSHAKE
&& recvd_type
!= NULL
)) {
1090 * SSL3_RT_APPLICATION_DATA or
1091 * SSL3_RT_HANDSHAKE or
1092 * SSL3_RT_CHANGE_CIPHER_SPEC
1095 * make sure that we are not getting application data when we are
1096 * doing a handshake for the first time
1098 if (SSL_in_init(s
) && (type
== SSL3_RT_APPLICATION_DATA
) &&
1099 (s
->enc_read_ctx
== NULL
)) {
1100 al
= SSL_AD_UNEXPECTED_MESSAGE
;
1101 SSLerr(SSL_F_SSL3_READ_BYTES
, SSL_R_APP_DATA_IN_HANDSHAKE
);
1105 if (type
== SSL3_RT_HANDSHAKE
1106 && SSL3_RECORD_get_type(rr
) == SSL3_RT_CHANGE_CIPHER_SPEC
1107 && s
->rlayer
.handshake_fragment_len
> 0) {
1108 al
= SSL_AD_UNEXPECTED_MESSAGE
;
1109 SSLerr(SSL_F_SSL3_READ_BYTES
, SSL_R_CCS_RECEIVED_EARLY
);
1113 if (recvd_type
!= NULL
)
1114 *recvd_type
= SSL3_RECORD_get_type(rr
);
1121 if ((unsigned int)len
- read_bytes
> SSL3_RECORD_get_length(rr
))
1122 n
= SSL3_RECORD_get_length(rr
);
1124 n
= (unsigned int)len
- read_bytes
;
1126 memcpy(buf
, &(rr
->data
[rr
->off
]), n
);
1129 SSL3_RECORD_sub_length(rr
, n
);
1130 SSL3_RECORD_add_off(rr
, n
);
1131 if (SSL3_RECORD_get_length(rr
) == 0) {
1132 s
->rlayer
.rstate
= SSL_ST_READ_HEADER
;
1133 SSL3_RECORD_set_off(rr
, 0);
1134 SSL3_RECORD_set_read(rr
);
1137 if (SSL3_RECORD_get_length(rr
) == 0
1138 || (peek
&& n
== SSL3_RECORD_get_length(rr
))) {
1143 } while (type
== SSL3_RT_APPLICATION_DATA
&& curr_rec
< num_recs
1144 && read_bytes
< (unsigned int)len
);
1145 if (read_bytes
== 0) {
1146 /* We must have read empty records. Get more data */
1149 if (!peek
&& curr_rec
== num_recs
1150 && (s
->mode
& SSL_MODE_RELEASE_BUFFERS
)
1151 && SSL3_BUFFER_get_left(rbuf
) == 0)
1152 ssl3_release_read_buffer(s
);
1157 * If we get here, then type != rr->type; if we have a handshake message,
1158 * then it was unexpected (Hello Request or Client Hello) or invalid (we
1159 * were actually expecting a CCS).
1162 if (rr
->type
== SSL3_RT_HANDSHAKE
&& type
== SSL3_RT_CHANGE_CIPHER_SPEC
) {
1163 al
= SSL_AD_UNEXPECTED_MESSAGE
;
1164 SSLerr(SSL_F_SSL3_READ_BYTES
, SSL_R_UNEXPECTED_MESSAGE
);
1169 * Lets just double check that we've not got an SSLv2 record
1171 if (rr
->rec_version
== SSL2_VERSION
) {
1173 * Should never happen. ssl3_get_record() should only give us an SSLv2
1174 * record back if this is the first packet and we are looking for an
1175 * initial ClientHello. Therefore |type| should always be equal to
1176 * |rr->type|. If not then something has gone horribly wrong
1178 al
= SSL_AD_INTERNAL_ERROR
;
1179 SSLerr(SSL_F_SSL3_READ_BYTES
, ERR_R_INTERNAL_ERROR
);
1183 if (s
->method
->version
== TLS_ANY_VERSION
1184 && (s
->server
|| rr
->type
!= SSL3_RT_ALERT
)) {
1186 * If we've got this far and still haven't decided on what version
1187 * we're using then this must be a client side alert we're dealing with
1188 * (we don't allow heartbeats yet). We shouldn't be receiving anything
1189 * other than a ClientHello if we are a server.
1191 s
->version
= rr
->rec_version
;
1192 al
= SSL_AD_UNEXPECTED_MESSAGE
;
1193 SSLerr(SSL_F_SSL3_READ_BYTES
, SSL_R_UNEXPECTED_MESSAGE
);
1198 * In case of record types for which we have 'fragment' storage, fill
1199 * that so that we can process the data at a fixed place.
1202 unsigned int dest_maxlen
= 0;
1203 unsigned char *dest
= NULL
;
1204 unsigned int *dest_len
= NULL
;
1206 if (SSL3_RECORD_get_type(rr
) == SSL3_RT_HANDSHAKE
) {
1207 dest_maxlen
= sizeof s
->rlayer
.handshake_fragment
;
1208 dest
= s
->rlayer
.handshake_fragment
;
1209 dest_len
= &s
->rlayer
.handshake_fragment_len
;
1210 } else if (SSL3_RECORD_get_type(rr
) == SSL3_RT_ALERT
) {
1211 dest_maxlen
= sizeof s
->rlayer
.alert_fragment
;
1212 dest
= s
->rlayer
.alert_fragment
;
1213 dest_len
= &s
->rlayer
.alert_fragment_len
;
1216 if (dest_maxlen
> 0) {
1217 n
= dest_maxlen
- *dest_len
; /* available space in 'dest' */
1218 if (SSL3_RECORD_get_length(rr
) < n
)
1219 n
= SSL3_RECORD_get_length(rr
); /* available bytes */
1221 /* now move 'n' bytes: */
1223 dest
[(*dest_len
)++] =
1224 SSL3_RECORD_get_data(rr
)[SSL3_RECORD_get_off(rr
)];
1225 SSL3_RECORD_add_off(rr
, 1);
1226 SSL3_RECORD_add_length(rr
, -1);
1229 if (*dest_len
< dest_maxlen
) {
1230 SSL3_RECORD_set_read(rr
);
1231 goto start
; /* fragment was too small */
1237 * s->rlayer.handshake_fragment_len == 4 iff rr->type == SSL3_RT_HANDSHAKE;
1238 * s->rlayer.alert_fragment_len == 2 iff rr->type == SSL3_RT_ALERT.
1239 * (Possibly rr is 'empty' now, i.e. rr->length may be 0.)
1242 /* If we are a client, check for an incoming 'Hello Request': */
1244 (s
->rlayer
.handshake_fragment_len
>= 4) &&
1245 (s
->rlayer
.handshake_fragment
[0] == SSL3_MT_HELLO_REQUEST
) &&
1246 (s
->session
!= NULL
) && (s
->session
->cipher
!= NULL
)) {
1247 s
->rlayer
.handshake_fragment_len
= 0;
1249 if ((s
->rlayer
.handshake_fragment
[1] != 0) ||
1250 (s
->rlayer
.handshake_fragment
[2] != 0) ||
1251 (s
->rlayer
.handshake_fragment
[3] != 0)) {
1252 al
= SSL_AD_DECODE_ERROR
;
1253 SSLerr(SSL_F_SSL3_READ_BYTES
, SSL_R_BAD_HELLO_REQUEST
);
1257 if (s
->msg_callback
)
1258 s
->msg_callback(0, s
->version
, SSL3_RT_HANDSHAKE
,
1259 s
->rlayer
.handshake_fragment
, 4, s
,
1260 s
->msg_callback_arg
);
1262 if (SSL_is_init_finished(s
) &&
1263 !(s
->s3
->flags
& SSL3_FLAGS_NO_RENEGOTIATE_CIPHERS
) &&
1264 !s
->s3
->renegotiate
) {
1265 ssl3_renegotiate(s
);
1266 if (ssl3_renegotiate_check(s
)) {
1267 i
= s
->handshake_func(s
);
1271 SSLerr(SSL_F_SSL3_READ_BYTES
, SSL_R_SSL_HANDSHAKE_FAILURE
);
1275 if (!(s
->mode
& SSL_MODE_AUTO_RETRY
)) {
1276 if (SSL3_BUFFER_get_left(rbuf
) == 0) {
1277 /* no read-ahead left? */
1280 * In the case where we try to read application data,
1281 * but we trigger an SSL handshake, we return -1 with
1282 * the retry option set. Otherwise renegotiation may
1283 * cause nasty problems in the blocking world
1285 s
->rwstate
= SSL_READING
;
1286 bio
= SSL_get_rbio(s
);
1287 BIO_clear_retry_flags(bio
);
1288 BIO_set_retry_read(bio
);
1295 * we either finished a handshake or ignored the request, now try
1296 * again to obtain the (application) data we were asked for
1301 * If we are a server and get a client hello when renegotiation isn't
1302 * allowed send back a no renegotiation alert and carry on. WARNING:
1303 * experimental code, needs reviewing (steve)
1306 SSL_is_init_finished(s
) &&
1307 !s
->s3
->send_connection_binding
&&
1308 (s
->version
> SSL3_VERSION
) &&
1309 (s
->rlayer
.handshake_fragment_len
>= 4) &&
1310 (s
->rlayer
.handshake_fragment
[0] == SSL3_MT_CLIENT_HELLO
) &&
1311 (s
->session
!= NULL
) && (s
->session
->cipher
!= NULL
) &&
1312 !(s
->ctx
->options
& SSL_OP_ALLOW_UNSAFE_LEGACY_RENEGOTIATION
)) {
1313 SSL3_RECORD_set_length(rr
, 0);
1314 SSL3_RECORD_set_read(rr
);
1315 ssl3_send_alert(s
, SSL3_AL_WARNING
, SSL_AD_NO_RENEGOTIATION
);
1318 if (s
->rlayer
.alert_fragment_len
>= 2) {
1319 int alert_level
= s
->rlayer
.alert_fragment
[0];
1320 int alert_descr
= s
->rlayer
.alert_fragment
[1];
1322 s
->rlayer
.alert_fragment_len
= 0;
1324 if (s
->msg_callback
)
1325 s
->msg_callback(0, s
->version
, SSL3_RT_ALERT
,
1326 s
->rlayer
.alert_fragment
, 2, s
,
1327 s
->msg_callback_arg
);
1329 if (s
->info_callback
!= NULL
)
1330 cb
= s
->info_callback
;
1331 else if (s
->ctx
->info_callback
!= NULL
)
1332 cb
= s
->ctx
->info_callback
;
1335 j
= (alert_level
<< 8) | alert_descr
;
1336 cb(s
, SSL_CB_READ_ALERT
, j
);
1339 if (alert_level
== SSL3_AL_WARNING
) {
1340 s
->s3
->warn_alert
= alert_descr
;
1341 SSL3_RECORD_set_read(rr
);
1342 if (alert_descr
== SSL_AD_CLOSE_NOTIFY
) {
1343 s
->shutdown
|= SSL_RECEIVED_SHUTDOWN
;
1347 * This is a warning but we receive it if we requested
1348 * renegotiation and the peer denied it. Terminate with a fatal
1349 * alert because if application tried to renegotiate it
1350 * presumably had a good reason and expects it to succeed. In
1351 * future we might have a renegotiation where we don't care if
1352 * the peer refused it where we carry on.
1354 else if (alert_descr
== SSL_AD_NO_RENEGOTIATION
) {
1355 al
= SSL_AD_HANDSHAKE_FAILURE
;
1356 SSLerr(SSL_F_SSL3_READ_BYTES
, SSL_R_NO_RENEGOTIATION
);
1359 #ifdef SSL_AD_MISSING_SRP_USERNAME
1360 else if (alert_descr
== SSL_AD_MISSING_SRP_USERNAME
)
1363 } else if (alert_level
== SSL3_AL_FATAL
) {
1366 s
->rwstate
= SSL_NOTHING
;
1367 s
->s3
->fatal_alert
= alert_descr
;
1368 SSLerr(SSL_F_SSL3_READ_BYTES
, SSL_AD_REASON_OFFSET
+ alert_descr
);
1369 BIO_snprintf(tmp
, sizeof tmp
, "%d", alert_descr
);
1370 ERR_add_error_data(2, "SSL alert number ", tmp
);
1371 s
->shutdown
|= SSL_RECEIVED_SHUTDOWN
;
1372 SSL3_RECORD_set_read(rr
);
1373 SSL_CTX_remove_session(s
->session_ctx
, s
->session
);
1376 al
= SSL_AD_ILLEGAL_PARAMETER
;
1377 SSLerr(SSL_F_SSL3_READ_BYTES
, SSL_R_UNKNOWN_ALERT_TYPE
);
1384 if (s
->shutdown
& SSL_SENT_SHUTDOWN
) { /* but we have not received a
1386 s
->rwstate
= SSL_NOTHING
;
1387 SSL3_RECORD_set_length(rr
, 0);
1388 SSL3_RECORD_set_read(rr
);
1392 if (SSL3_RECORD_get_type(rr
) == SSL3_RT_CHANGE_CIPHER_SPEC
) {
1393 al
= SSL_AD_UNEXPECTED_MESSAGE
;
1394 SSLerr(SSL_F_SSL3_READ_BYTES
, SSL_R_CCS_RECEIVED_EARLY
);
1399 * Unexpected handshake message (Client Hello, or protocol violation)
1401 if ((s
->rlayer
.handshake_fragment_len
>= 4)
1402 && !ossl_statem_get_in_handshake(s
)) {
1403 if (SSL_is_init_finished(s
) &&
1404 !(s
->s3
->flags
& SSL3_FLAGS_NO_RENEGOTIATE_CIPHERS
)) {
1405 ossl_statem_set_in_init(s
, 1);
1409 i
= s
->handshake_func(s
);
1413 SSLerr(SSL_F_SSL3_READ_BYTES
, SSL_R_SSL_HANDSHAKE_FAILURE
);
1417 if (!(s
->mode
& SSL_MODE_AUTO_RETRY
)) {
1418 if (SSL3_BUFFER_get_left(rbuf
) == 0) {
1419 /* no read-ahead left? */
1422 * In the case where we try to read application data, but we
1423 * trigger an SSL handshake, we return -1 with the retry
1424 * option set. Otherwise renegotiation may cause nasty
1425 * problems in the blocking world
1427 s
->rwstate
= SSL_READING
;
1428 bio
= SSL_get_rbio(s
);
1429 BIO_clear_retry_flags(bio
);
1430 BIO_set_retry_read(bio
);
1437 switch (SSL3_RECORD_get_type(rr
)) {
1440 * TLS up to v1.1 just ignores unknown message types: TLS v1.2 give
1441 * an unexpected message alert.
1443 if (s
->version
>= TLS1_VERSION
&& s
->version
<= TLS1_1_VERSION
) {
1444 SSL3_RECORD_set_length(rr
, 0);
1445 SSL3_RECORD_set_read(rr
);
1448 al
= SSL_AD_UNEXPECTED_MESSAGE
;
1449 SSLerr(SSL_F_SSL3_READ_BYTES
, SSL_R_UNEXPECTED_RECORD
);
1451 case SSL3_RT_CHANGE_CIPHER_SPEC
:
1453 case SSL3_RT_HANDSHAKE
:
1455 * we already handled all of these, with the possible exception of
1456 * SSL3_RT_HANDSHAKE when ossl_statem_get_in_handshake(s) is true, but
1457 * that should not happen when type != rr->type
1459 al
= SSL_AD_UNEXPECTED_MESSAGE
;
1460 SSLerr(SSL_F_SSL3_READ_BYTES
, ERR_R_INTERNAL_ERROR
);
1462 case SSL3_RT_APPLICATION_DATA
:
1464 * At this point, we were expecting handshake data, but have
1465 * application data. If the library was running inside ssl3_read()
1466 * (i.e. in_read_app_data is set) and it makes sense to read
1467 * application data at this point (session renegotiation not yet
1468 * started), we will indulge it.
1470 if (ossl_statem_app_data_allowed(s
)) {
1471 s
->s3
->in_read_app_data
= 2;
1474 al
= SSL_AD_UNEXPECTED_MESSAGE
;
1475 SSLerr(SSL_F_SSL3_READ_BYTES
, SSL_R_UNEXPECTED_RECORD
);
1482 ssl3_send_alert(s
, SSL3_AL_FATAL
, al
);
1486 void ssl3_record_sequence_update(unsigned char *seq
)
1490 for (i
= 7; i
>= 0; i
--) {
1498 * Returns true if the current rrec was sent in SSLv2 backwards compatible
1499 * format and false otherwise.
1501 int RECORD_LAYER_is_sslv2_record(RECORD_LAYER
*rl
)
1503 return SSL3_RECORD_is_sslv2_record(&rl
->rrec
[0]);
1507 * Returns the length in bytes of the current rrec
1509 unsigned int RECORD_LAYER_get_rrec_length(RECORD_LAYER
*rl
)
1511 return SSL3_RECORD_get_length(&rl
->rrec
[0]);