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Commit | Line | Data |
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846e33c7 | 1 | /* |
33388b44 | 2 | * Copyright 1995-2020 The OpenSSL Project Authors. All Rights Reserved. |
c51ae173 | 3 | * |
2c18d164 | 4 | * Licensed under the Apache License 2.0 (the "License"). You may not use |
846e33c7 RS |
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 | |
c51ae173 | 8 | */ |
d02b48c6 RE |
9 | |
10 | #include <stdio.h> | |
339da43d | 11 | #include <limits.h> |
d02b48c6 | 12 | #include <errno.h> |
706457b7 | 13 | #include "../ssl_local.h" |
ec577822 BM |
14 | #include <openssl/evp.h> |
15 | #include <openssl/buffer.h> | |
637f374a | 16 | #include <openssl/rand.h> |
706457b7 | 17 | #include "record_local.h" |
0d345f0e | 18 | #include "internal/packet.h" |
d02b48c6 | 19 | |
0f113f3e MC |
20 | #if defined(OPENSSL_SMALL_FOOTPRINT) || \ |
21 | !( defined(AES_ASM) && ( \ | |
22 | defined(__x86_64) || defined(__x86_64__) || \ | |
fbaf30d0 | 23 | defined(_M_AMD64) || defined(_M_X64) ) \ |
0f113f3e | 24 | ) |
a9c6edcd AP |
25 | # undef EVP_CIPH_FLAG_TLS1_1_MULTIBLOCK |
26 | # define EVP_CIPH_FLAG_TLS1_1_MULTIBLOCK 0 | |
27 | #endif | |
28 | ||
c036e210 MC |
29 | void RECORD_LAYER_init(RECORD_LAYER *rl, SSL *s) |
30 | { | |
31 | rl->s = s; | |
78fcddbb | 32 | RECORD_LAYER_set_first_record(&s->rlayer); |
94777c9c | 33 | SSL3_RECORD_clear(rl->rrec, SSL_MAX_PIPELINES); |
c036e210 MC |
34 | } |
35 | ||
af9752e5 MC |
36 | void RECORD_LAYER_clear(RECORD_LAYER *rl) |
37 | { | |
6b41b3f5 | 38 | rl->rstate = SSL_ST_READ_HEADER; |
af9752e5 | 39 | |
a230b26e EK |
40 | /* |
41 | * Do I need to clear read_ahead? As far as I can tell read_ahead did not | |
af9752e5 MC |
42 | * previously get reset by SSL_clear...so I'll keep it that way..but is |
43 | * that right? | |
44 | */ | |
6b41b3f5 MC |
45 | |
46 | rl->packet = NULL; | |
47 | rl->packet_length = 0; | |
48 | rl->wnum = 0; | |
6b41b3f5 MC |
49 | memset(rl->handshake_fragment, 0, sizeof(rl->handshake_fragment)); |
50 | rl->handshake_fragment_len = 0; | |
51 | rl->wpend_tot = 0; | |
52 | rl->wpend_type = 0; | |
53 | rl->wpend_ret = 0; | |
54 | rl->wpend_buf = NULL; | |
55 | ||
56 | SSL3_BUFFER_clear(&rl->rbuf); | |
4bf08600 | 57 | ssl3_release_write_buffer(rl->s); |
0aac3a6b | 58 | rl->numrpipes = 0; |
94777c9c | 59 | SSL3_RECORD_clear(rl->rrec, SSL_MAX_PIPELINES); |
6b41b3f5 | 60 | |
95cdad63 MC |
61 | RECORD_LAYER_reset_read_sequence(rl); |
62 | RECORD_LAYER_reset_write_sequence(rl); | |
0485d540 | 63 | |
6b41b3f5 | 64 | if (rl->d) |
5fb6f80c | 65 | DTLS_RECORD_LAYER_clear(rl); |
af9752e5 MC |
66 | } |
67 | ||
f161995e MC |
68 | void RECORD_LAYER_release(RECORD_LAYER *rl) |
69 | { | |
70 | if (SSL3_BUFFER_is_initialised(&rl->rbuf)) | |
71 | ssl3_release_read_buffer(rl->s); | |
d102d9df | 72 | if (rl->numwpipes > 0) |
f161995e | 73 | ssl3_release_write_buffer(rl->s); |
94777c9c | 74 | SSL3_RECORD_release(rl->rrec, SSL_MAX_PIPELINES); |
f161995e MC |
75 | } |
76 | ||
b8c49611 | 77 | /* Checks if we have unprocessed read ahead data pending */ |
49580f25 | 78 | int RECORD_LAYER_read_pending(const RECORD_LAYER *rl) |
f161995e MC |
79 | { |
80 | return SSL3_BUFFER_get_left(&rl->rbuf) != 0; | |
81 | } | |
82 | ||
b8c49611 MC |
83 | /* Checks if we have decrypted unread record data pending */ |
84 | int RECORD_LAYER_processed_read_pending(const RECORD_LAYER *rl) | |
85 | { | |
86 | size_t curr_rec = 0, num_recs = RECORD_LAYER_get_numrpipes(rl); | |
87 | const SSL3_RECORD *rr = rl->rrec; | |
88 | ||
89 | while (curr_rec < num_recs && SSL3_RECORD_is_read(&rr[curr_rec])) | |
90 | curr_rec++; | |
91 | ||
92 | return curr_rec < num_recs; | |
93 | } | |
94 | ||
49580f25 | 95 | int RECORD_LAYER_write_pending(const RECORD_LAYER *rl) |
f161995e | 96 | { |
d102d9df | 97 | return (rl->numwpipes > 0) |
a230b26e | 98 | && SSL3_BUFFER_get_left(&rl->wbuf[rl->numwpipes - 1]) != 0; |
f161995e MC |
99 | } |
100 | ||
de07f311 MC |
101 | void RECORD_LAYER_reset_read_sequence(RECORD_LAYER *rl) |
102 | { | |
95cdad63 | 103 | memset(rl->read_sequence, 0, sizeof(rl->read_sequence)); |
de07f311 MC |
104 | } |
105 | ||
106 | void RECORD_LAYER_reset_write_sequence(RECORD_LAYER *rl) | |
107 | { | |
95cdad63 | 108 | memset(rl->write_sequence, 0, sizeof(rl->write_sequence)); |
de07f311 MC |
109 | } |
110 | ||
8b0e934a | 111 | size_t ssl3_pending(const SSL *s) |
d5a25ae0 | 112 | { |
8b0e934a | 113 | size_t i, num = 0; |
94777c9c | 114 | |
295c3f41 | 115 | if (s->rlayer.rstate == SSL_ST_READ_BODY) |
d5a25ae0 MC |
116 | return 0; |
117 | ||
94777c9c MC |
118 | for (i = 0; i < RECORD_LAYER_get_numrpipes(&s->rlayer); i++) { |
119 | if (SSL3_RECORD_get_type(&s->rlayer.rrec[i]) | |
a230b26e | 120 | != SSL3_RT_APPLICATION_DATA) |
94777c9c MC |
121 | return 0; |
122 | num += SSL3_RECORD_get_length(&s->rlayer.rrec[i]); | |
123 | } | |
124 | ||
125 | return num; | |
d5a25ae0 MC |
126 | } |
127 | ||
dad78fb1 MC |
128 | void SSL_CTX_set_default_read_buffer_len(SSL_CTX *ctx, size_t len) |
129 | { | |
130 | ctx->default_read_buf_len = len; | |
131 | } | |
132 | ||
133 | void SSL_set_default_read_buffer_len(SSL *s, size_t len) | |
134 | { | |
135 | SSL3_BUFFER_set_default_len(RECORD_LAYER_get_rbuf(&s->rlayer), len); | |
136 | } | |
137 | ||
295c3f41 MC |
138 | const char *SSL_rstate_string_long(const SSL *s) |
139 | { | |
295c3f41 MC |
140 | switch (s->rlayer.rstate) { |
141 | case SSL_ST_READ_HEADER: | |
475965f2 | 142 | return "read header"; |
295c3f41 | 143 | case SSL_ST_READ_BODY: |
475965f2 | 144 | return "read body"; |
295c3f41 | 145 | case SSL_ST_READ_DONE: |
475965f2 | 146 | return "read done"; |
295c3f41 | 147 | default: |
475965f2 | 148 | return "unknown"; |
295c3f41 | 149 | } |
295c3f41 MC |
150 | } |
151 | ||
152 | const char *SSL_rstate_string(const SSL *s) | |
153 | { | |
295c3f41 MC |
154 | switch (s->rlayer.rstate) { |
155 | case SSL_ST_READ_HEADER: | |
475965f2 | 156 | return "RH"; |
295c3f41 | 157 | case SSL_ST_READ_BODY: |
475965f2 | 158 | return "RB"; |
295c3f41 | 159 | case SSL_ST_READ_DONE: |
475965f2 | 160 | return "RD"; |
295c3f41 | 161 | default: |
475965f2 | 162 | return "unknown"; |
295c3f41 | 163 | } |
295c3f41 MC |
164 | } |
165 | ||
4880672a | 166 | /* |
beacb0f0 | 167 | * Return values are as per SSL_read() |
4880672a | 168 | */ |
8e6d03ca | 169 | int ssl3_read_n(SSL *s, size_t n, size_t max, int extend, int clearold, |
54105ddd | 170 | size_t *readbytes) |
0f113f3e MC |
171 | { |
172 | /* | |
173 | * If extend == 0, obtain new n-byte packet; if extend == 1, increase | |
174 | * packet by another n bytes. The packet will be in the sub-array of | |
555cbb32 | 175 | * s->s3.rbuf.buf specified by s->packet and s->packet_length. (If |
52e1d7b1 | 176 | * s->rlayer.read_ahead is set, 'max' bytes may be stored in rbuf [plus |
0f113f3e | 177 | * s->packet_length bytes if extend == 1].) |
94777c9c MC |
178 | * if clearold == 1, move the packet to the start of the buffer; if |
179 | * clearold == 0 then leave any old packets where they were | |
0f113f3e | 180 | */ |
8e6d03ca | 181 | size_t len, left, align = 0; |
0f113f3e MC |
182 | unsigned char *pkt; |
183 | SSL3_BUFFER *rb; | |
184 | ||
8e6d03ca MC |
185 | if (n == 0) |
186 | return 0; | |
0f113f3e | 187 | |
88c23039 | 188 | rb = &s->rlayer.rbuf; |
0f113f3e | 189 | if (rb->buf == NULL) |
196f2cbb MC |
190 | if (!ssl3_setup_read_buffer(s)) { |
191 | /* SSLfatal() already called */ | |
0f113f3e | 192 | return -1; |
196f2cbb | 193 | } |
0f113f3e MC |
194 | |
195 | left = rb->left; | |
a4d64c7f | 196 | #if defined(SSL3_ALIGN_PAYLOAD) && SSL3_ALIGN_PAYLOAD!=0 |
f4bd5de5 | 197 | align = (size_t)rb->buf + SSL3_RT_HEADER_LENGTH; |
753be41d | 198 | align = SSL3_ALIGN_PAYLOAD - 1 - ((align - 1) % SSL3_ALIGN_PAYLOAD); |
a4d64c7f | 199 | #endif |
d02b48c6 | 200 | |
0f113f3e MC |
201 | if (!extend) { |
202 | /* start with empty packet ... */ | |
203 | if (left == 0) | |
204 | rb->offset = align; | |
205 | else if (align != 0 && left >= SSL3_RT_HEADER_LENGTH) { | |
206 | /* | |
207 | * check if next packet length is large enough to justify payload | |
208 | * alignment... | |
209 | */ | |
210 | pkt = rb->buf + rb->offset; | |
211 | if (pkt[0] == SSL3_RT_APPLICATION_DATA | |
212 | && (pkt[3] << 8 | pkt[4]) >= 128) { | |
213 | /* | |
214 | * Note that even if packet is corrupted and its length field | |
215 | * is insane, we can only be led to wrong decision about | |
216 | * whether memmove will occur or not. Header values has no | |
217 | * effect on memmove arguments and therefore no buffer | |
218 | * overrun can be triggered. | |
219 | */ | |
220 | memmove(rb->buf + align, pkt, left); | |
221 | rb->offset = align; | |
222 | } | |
223 | } | |
7a7048af MC |
224 | s->rlayer.packet = rb->buf + rb->offset; |
225 | s->rlayer.packet_length = 0; | |
0f113f3e MC |
226 | /* ... now we can act as if 'extend' was set */ |
227 | } | |
228 | ||
a7faa6da MC |
229 | len = s->rlayer.packet_length; |
230 | pkt = rb->buf + align; | |
231 | /* | |
232 | * Move any available bytes to front of buffer: 'len' bytes already | |
233 | * pointed to by 'packet', 'left' extra ones at the end | |
234 | */ | |
235 | if (s->rlayer.packet != pkt && clearold == 1) { | |
236 | memmove(pkt, s->rlayer.packet, len + left); | |
237 | s->rlayer.packet = pkt; | |
238 | rb->offset = len + align; | |
239 | } | |
240 | ||
0f113f3e MC |
241 | /* |
242 | * For DTLS/UDP reads should not span multiple packets because the read | |
243 | * operation returns the whole packet at once (as long as it fits into | |
244 | * the buffer). | |
245 | */ | |
246 | if (SSL_IS_DTLS(s)) { | |
247 | if (left == 0 && extend) | |
248 | return 0; | |
249 | if (left > 0 && n > left) | |
250 | n = left; | |
251 | } | |
252 | ||
253 | /* if there is enough in the buffer from a previous read, take some */ | |
254 | if (left >= n) { | |
7a7048af | 255 | s->rlayer.packet_length += n; |
0f113f3e MC |
256 | rb->left = left - n; |
257 | rb->offset += n; | |
54105ddd | 258 | *readbytes = n; |
8e6d03ca | 259 | return 1; |
0f113f3e MC |
260 | } |
261 | ||
262 | /* else we need to read more data */ | |
263 | ||
196f2cbb MC |
264 | if (n > rb->len - rb->offset) { |
265 | /* does not happen */ | |
266 | SSLfatal(s, SSL_AD_INTERNAL_ERROR, SSL_F_SSL3_READ_N, | |
267 | ERR_R_INTERNAL_ERROR); | |
0f113f3e MC |
268 | return -1; |
269 | } | |
270 | ||
c35e921f BP |
271 | /* |
272 | * Ktls always reads full records. | |
273 | * Also, we always act like read_ahead is set for DTLS. | |
274 | */ | |
275 | if (!BIO_get_ktls_recv(s->rbio) && !s->rlayer.read_ahead | |
276 | && !SSL_IS_DTLS(s)) { | |
0f113f3e MC |
277 | /* ignore max parameter */ |
278 | max = n; | |
c35e921f | 279 | } else { |
0f113f3e MC |
280 | if (max < n) |
281 | max = n; | |
ff04799d | 282 | if (max > rb->len - rb->offset) |
0f113f3e MC |
283 | max = rb->len - rb->offset; |
284 | } | |
285 | ||
286 | while (left < n) { | |
f0ca8f89 | 287 | size_t bioread = 0; |
8e6d03ca MC |
288 | int ret; |
289 | ||
0f113f3e | 290 | /* |
555cbb32 | 291 | * Now we have len+left bytes at the front of s->s3.rbuf.buf and |
0f113f3e MC |
292 | * need to read in more until we have len+n (up to len+max if |
293 | * possible) | |
294 | */ | |
295 | ||
296 | clear_sys_error(); | |
297 | if (s->rbio != NULL) { | |
298 | s->rwstate = SSL_READING; | |
8e6d03ca MC |
299 | /* TODO(size_t): Convert this function */ |
300 | ret = BIO_read(s->rbio, pkt + len + left, max - left); | |
301 | if (ret >= 0) | |
302 | bioread = ret; | |
d924dbf4 MC |
303 | if (ret <= 0 |
304 | && !BIO_should_retry(s->rbio) | |
305 | && BIO_eof(s->rbio)) { | |
306 | SSLfatal(s, SSL_AD_DECODE_ERROR, SSL_F_SSL3_READ_N, | |
307 | SSL_R_UNEXPECTED_EOF_WHILE_READING); | |
308 | } | |
0f113f3e | 309 | } else { |
196f2cbb MC |
310 | SSLfatal(s, SSL_AD_INTERNAL_ERROR, SSL_F_SSL3_READ_N, |
311 | SSL_R_READ_BIO_NOT_SET); | |
8e6d03ca | 312 | ret = -1; |
0f113f3e MC |
313 | } |
314 | ||
8e6d03ca | 315 | if (ret <= 0) { |
0f113f3e MC |
316 | rb->left = left; |
317 | if (s->mode & SSL_MODE_RELEASE_BUFFERS && !SSL_IS_DTLS(s)) | |
318 | if (len + left == 0) | |
319 | ssl3_release_read_buffer(s); | |
beacb0f0 | 320 | return ret; |
0f113f3e | 321 | } |
8e6d03ca | 322 | left += bioread; |
0f113f3e MC |
323 | /* |
324 | * reads should *never* span multiple packets for DTLS because the | |
325 | * underlying transport protocol is message oriented as opposed to | |
326 | * byte oriented as in the TLS case. | |
327 | */ | |
328 | if (SSL_IS_DTLS(s)) { | |
329 | if (n > left) | |
330 | n = left; /* makes the while condition false */ | |
331 | } | |
332 | } | |
333 | ||
334 | /* done reading, now the book-keeping */ | |
335 | rb->offset += n; | |
336 | rb->left = left - n; | |
7a7048af | 337 | s->rlayer.packet_length += n; |
0f113f3e | 338 | s->rwstate = SSL_NOTHING; |
54105ddd | 339 | *readbytes = n; |
8e6d03ca | 340 | return 1; |
0f113f3e MC |
341 | } |
342 | ||
0f113f3e MC |
343 | /* |
344 | * Call this to write data in records of type 'type' It will return <= 0 if | |
345 | * not all data has been sent or non-blocking IO. | |
d02b48c6 | 346 | */ |
7ee8627f MC |
347 | int ssl3_write_bytes(SSL *s, int type, const void *buf_, size_t len, |
348 | size_t *written) | |
0f113f3e MC |
349 | { |
350 | const unsigned char *buf = buf_; | |
7ee8627f | 351 | size_t tot; |
cf72c757 | 352 | size_t n, max_send_fragment, split_send_fragment, maxpipes; |
f1f7598c | 353 | #if !defined(OPENSSL_NO_MULTIBLOCK) && EVP_CIPH_FLAG_TLS1_1_MULTIBLOCK |
cf72c757 | 354 | size_t nw; |
f1f7598c | 355 | #endif |
d102d9df | 356 | SSL3_BUFFER *wb = &s->rlayer.wbuf[0]; |
0f113f3e | 357 | int i; |
7ee8627f | 358 | size_t tmpwrit; |
0f113f3e MC |
359 | |
360 | s->rwstate = SSL_NOTHING; | |
e2228d31 | 361 | tot = s->rlayer.wnum; |
0f113f3e MC |
362 | /* |
363 | * ensure that if we end up with a smaller value of data to write out | |
3519bae5 | 364 | * than the original len from a write which didn't complete for |
0f113f3e MC |
365 | * non-blocking I/O and also somehow ended up avoiding the check for |
366 | * this in ssl3_write_pending/SSL_R_BAD_WRITE_RETRY as it must never be | |
367 | * possible to end up with (len-tot) as a large number that will then | |
368 | * promptly send beyond the end of the users buffer ... so we trap and | |
369 | * report the error in a way the user will notice | |
370 | */ | |
bd91e3c8 | 371 | if ((len < s->rlayer.wnum) |
cbbe9186 | 372 | || ((wb->left != 0) && (len < (s->rlayer.wnum + s->rlayer.wpend_tot)))) { |
c2853382 MC |
373 | SSLfatal(s, SSL_AD_INTERNAL_ERROR, SSL_F_SSL3_WRITE_BYTES, |
374 | SSL_R_BAD_LENGTH); | |
1c2e5d56 MC |
375 | return -1; |
376 | } | |
377 | ||
7daf7156 | 378 | if (s->early_data_state == SSL_EARLY_DATA_WRITING |
196f2cbb MC |
379 | && !early_data_count_ok(s, len, 0, 1)) { |
380 | /* SSLfatal() already called */ | |
7daf7156 | 381 | return -1; |
196f2cbb | 382 | } |
7daf7156 | 383 | |
1c2e5d56 MC |
384 | s->rlayer.wnum = 0; |
385 | ||
feb9e31c MC |
386 | /* |
387 | * If we are supposed to be sending a KeyUpdate then go into init unless we | |
388 | * have writes pending - in which case we should finish doing that first. | |
389 | */ | |
390 | if (wb->left == 0 && s->key_update != SSL_KEY_UPDATE_NONE) | |
391 | ossl_statem_set_in_init(s, 1); | |
392 | ||
59cebcf9 MC |
393 | /* |
394 | * When writing early data on the server side we could be "in_init" in | |
395 | * between receiving the EoED and the CF - but we don't want to handle those | |
396 | * messages yet. | |
397 | */ | |
398 | if (SSL_in_init(s) && !ossl_statem_get_in_handshake(s) | |
399 | && s->early_data_state != SSL_EARLY_DATA_UNAUTH_WRITING) { | |
1c2e5d56 | 400 | i = s->handshake_func(s); |
c2853382 | 401 | /* SSLfatal() already called */ |
1c2e5d56 | 402 | if (i < 0) |
7ee8627f | 403 | return i; |
1c2e5d56 | 404 | if (i == 0) { |
1c2e5d56 MC |
405 | return -1; |
406 | } | |
0f113f3e MC |
407 | } |
408 | ||
409 | /* | |
410 | * first check if there is a SSL3_BUFFER still being written out. This | |
411 | * will happen with non blocking IO | |
412 | */ | |
413 | if (wb->left != 0) { | |
c2853382 | 414 | /* SSLfatal() already called if appropriate */ |
7ee8627f MC |
415 | i = ssl3_write_pending(s, type, &buf[tot], s->rlayer.wpend_tot, |
416 | &tmpwrit); | |
0f113f3e MC |
417 | if (i <= 0) { |
418 | /* XXX should we ssl3_release_write_buffer if i<0? */ | |
e2228d31 | 419 | s->rlayer.wnum = tot; |
0f113f3e MC |
420 | return i; |
421 | } | |
7ee8627f | 422 | tot += tmpwrit; /* this might be last fragment */ |
0f113f3e | 423 | } |
a9c6edcd | 424 | #if !defined(OPENSSL_NO_MULTIBLOCK) && EVP_CIPH_FLAG_TLS1_1_MULTIBLOCK |
0f113f3e MC |
425 | /* |
426 | * Depending on platform multi-block can deliver several *times* | |
427 | * better performance. Downside is that it has to allocate | |
8483a003 | 428 | * jumbo buffer to accommodate up to 8 records, but the |
0f113f3e MC |
429 | * compromise is considered worthy. |
430 | */ | |
431 | if (type == SSL3_RT_APPLICATION_DATA && | |
cf72c757 | 432 | len >= 4 * (max_send_fragment = ssl_get_max_send_fragment(s)) && |
0f113f3e | 433 | s->compress == NULL && s->msg_callback == NULL && |
28a31a0a | 434 | !SSL_WRITE_ETM(s) && SSL_USE_EXPLICIT_IV(s) && |
54f30cb5 | 435 | (BIO_get_ktls_send(s->wbio) == 0) && |
846ec07d | 436 | EVP_CIPHER_flags(EVP_CIPHER_CTX_cipher(s->enc_write_ctx)) & |
0f113f3e MC |
437 | EVP_CIPH_FLAG_TLS1_1_MULTIBLOCK) { |
438 | unsigned char aad[13]; | |
439 | EVP_CTRL_TLS1_1_MULTIBLOCK_PARAM mb_param; | |
8e6d03ca | 440 | size_t packlen; |
e3c9727f | 441 | int packleni; |
0f113f3e MC |
442 | |
443 | /* minimize address aliasing conflicts */ | |
444 | if ((max_send_fragment & 0xfff) == 0) | |
445 | max_send_fragment -= 512; | |
446 | ||
447 | if (tot == 0 || wb->buf == NULL) { /* allocate jumbo buffer */ | |
448 | ssl3_release_write_buffer(s); | |
449 | ||
450 | packlen = EVP_CIPHER_CTX_ctrl(s->enc_write_ctx, | |
451 | EVP_CTRL_TLS1_1_MULTIBLOCK_MAX_BUFSIZE, | |
8b0e934a | 452 | (int)max_send_fragment, NULL); |
0f113f3e | 453 | |
7ee8627f | 454 | if (len >= 8 * max_send_fragment) |
0f113f3e MC |
455 | packlen *= 8; |
456 | else | |
457 | packlen *= 4; | |
458 | ||
58c27c20 | 459 | if (!ssl3_setup_write_buffer(s, 1, packlen)) { |
c2853382 | 460 | /* SSLfatal() already called */ |
918bb865 MC |
461 | return -1; |
462 | } | |
0f113f3e | 463 | } else if (tot == len) { /* done? */ |
58c27c20 MC |
464 | /* free jumbo buffer */ |
465 | ssl3_release_write_buffer(s); | |
8b0e934a MC |
466 | *written = tot; |
467 | return 1; | |
0f113f3e MC |
468 | } |
469 | ||
470 | n = (len - tot); | |
471 | for (;;) { | |
472 | if (n < 4 * max_send_fragment) { | |
58c27c20 MC |
473 | /* free jumbo buffer */ |
474 | ssl3_release_write_buffer(s); | |
0f113f3e MC |
475 | break; |
476 | } | |
477 | ||
555cbb32 | 478 | if (s->s3.alert_dispatch) { |
0f113f3e MC |
479 | i = s->method->ssl_dispatch_alert(s); |
480 | if (i <= 0) { | |
c2853382 | 481 | /* SSLfatal() already called if appropriate */ |
e2228d31 | 482 | s->rlayer.wnum = tot; |
0f113f3e MC |
483 | return i; |
484 | } | |
485 | } | |
486 | ||
487 | if (n >= 8 * max_send_fragment) | |
488 | nw = max_send_fragment * (mb_param.interleave = 8); | |
489 | else | |
490 | nw = max_send_fragment * (mb_param.interleave = 4); | |
491 | ||
de07f311 | 492 | memcpy(aad, s->rlayer.write_sequence, 8); |
0f113f3e MC |
493 | aad[8] = type; |
494 | aad[9] = (unsigned char)(s->version >> 8); | |
495 | aad[10] = (unsigned char)(s->version); | |
496 | aad[11] = 0; | |
497 | aad[12] = 0; | |
498 | mb_param.out = NULL; | |
499 | mb_param.inp = aad; | |
500 | mb_param.len = nw; | |
501 | ||
e3c9727f | 502 | packleni = EVP_CIPHER_CTX_ctrl(s->enc_write_ctx, |
0f113f3e MC |
503 | EVP_CTRL_TLS1_1_MULTIBLOCK_AAD, |
504 | sizeof(mb_param), &mb_param); | |
e3c9727f MC |
505 | packlen = (size_t)packleni; |
506 | if (packleni <= 0 || packlen > wb->len) { /* never happens */ | |
58c27c20 MC |
507 | /* free jumbo buffer */ |
508 | ssl3_release_write_buffer(s); | |
0f113f3e MC |
509 | break; |
510 | } | |
511 | ||
512 | mb_param.out = wb->buf; | |
513 | mb_param.inp = &buf[tot]; | |
514 | mb_param.len = nw; | |
515 | ||
516 | if (EVP_CIPHER_CTX_ctrl(s->enc_write_ctx, | |
517 | EVP_CTRL_TLS1_1_MULTIBLOCK_ENCRYPT, | |
518 | sizeof(mb_param), &mb_param) <= 0) | |
519 | return -1; | |
520 | ||
de07f311 MC |
521 | s->rlayer.write_sequence[7] += mb_param.interleave; |
522 | if (s->rlayer.write_sequence[7] < mb_param.interleave) { | |
0f113f3e | 523 | int j = 6; |
de07f311 | 524 | while (j >= 0 && (++s->rlayer.write_sequence[j--]) == 0) ; |
0f113f3e MC |
525 | } |
526 | ||
527 | wb->offset = 0; | |
528 | wb->left = packlen; | |
529 | ||
f8caa3c8 MC |
530 | s->rlayer.wpend_tot = nw; |
531 | s->rlayer.wpend_buf = &buf[tot]; | |
532 | s->rlayer.wpend_type = type; | |
533 | s->rlayer.wpend_ret = nw; | |
0f113f3e | 534 | |
7ee8627f | 535 | i = ssl3_write_pending(s, type, &buf[tot], nw, &tmpwrit); |
0f113f3e | 536 | if (i <= 0) { |
c2853382 | 537 | /* SSLfatal() already called if appropriate */ |
1d2a18dc | 538 | if (i < 0 && (!s->wbio || !BIO_should_retry(s->wbio))) { |
58c27c20 MC |
539 | /* free jumbo buffer */ |
540 | ssl3_release_write_buffer(s); | |
0f113f3e | 541 | } |
e2228d31 | 542 | s->rlayer.wnum = tot; |
0f113f3e MC |
543 | return i; |
544 | } | |
7ee8627f | 545 | if (tmpwrit == n) { |
58c27c20 MC |
546 | /* free jumbo buffer */ |
547 | ssl3_release_write_buffer(s); | |
7ee8627f MC |
548 | *written = tot + tmpwrit; |
549 | return 1; | |
0f113f3e | 550 | } |
7ee8627f MC |
551 | n -= tmpwrit; |
552 | tot += tmpwrit; | |
0f113f3e MC |
553 | } |
554 | } else | |
cf72c757 | 555 | #endif /* !defined(OPENSSL_NO_MULTIBLOCK) && EVP_CIPH_FLAG_TLS1_1_MULTIBLOCK */ |
0f113f3e MC |
556 | if (tot == len) { /* done? */ |
557 | if (s->mode & SSL_MODE_RELEASE_BUFFERS && !SSL_IS_DTLS(s)) | |
558 | ssl3_release_write_buffer(s); | |
559 | ||
7ee8627f MC |
560 | *written = tot; |
561 | return 1; | |
0f113f3e MC |
562 | } |
563 | ||
564 | n = (len - tot); | |
d102d9df | 565 | |
cf72c757 F |
566 | max_send_fragment = ssl_get_max_send_fragment(s); |
567 | split_send_fragment = ssl_get_split_send_fragment(s); | |
d102d9df MC |
568 | /* |
569 | * If max_pipelines is 0 then this means "undefined" and we default to | |
8483a003 | 570 | * 1 pipeline. Similarly if the cipher does not support pipelined |
d102d9df MC |
571 | * processing then we also only use 1 pipeline, or if we're not using |
572 | * explicit IVs | |
573 | */ | |
574 | maxpipes = s->max_pipelines; | |
575 | if (maxpipes > SSL_MAX_PIPELINES) { | |
576 | /* | |
577 | * We should have prevented this when we set max_pipelines so we | |
578 | * shouldn't get here | |
a230b26e | 579 | */ |
c2853382 MC |
580 | SSLfatal(s, SSL_AD_INTERNAL_ERROR, SSL_F_SSL3_WRITE_BYTES, |
581 | ERR_R_INTERNAL_ERROR); | |
d102d9df MC |
582 | return -1; |
583 | } | |
584 | if (maxpipes == 0 | |
a230b26e EK |
585 | || s->enc_write_ctx == NULL |
586 | || !(EVP_CIPHER_flags(EVP_CIPHER_CTX_cipher(s->enc_write_ctx)) | |
587 | & EVP_CIPH_FLAG_PIPELINE) | |
588 | || !SSL_USE_EXPLICIT_IV(s)) | |
d102d9df | 589 | maxpipes = 1; |
cf72c757 F |
590 | if (max_send_fragment == 0 || split_send_fragment == 0 |
591 | || split_send_fragment > max_send_fragment) { | |
d102d9df | 592 | /* |
cf72c757 | 593 | * We should have prevented this when we set/get the split and max send |
d102d9df | 594 | * fragments so we shouldn't get here |
a230b26e | 595 | */ |
c2853382 MC |
596 | SSLfatal(s, SSL_AD_INTERNAL_ERROR, SSL_F_SSL3_WRITE_BYTES, |
597 | ERR_R_INTERNAL_ERROR); | |
d102d9df MC |
598 | return -1; |
599 | } | |
600 | ||
0f113f3e | 601 | for (;;) { |
7ee8627f MC |
602 | size_t pipelens[SSL_MAX_PIPELINES], tmppipelen, remain; |
603 | size_t numpipes, j; | |
d102d9df MC |
604 | |
605 | if (n == 0) | |
606 | numpipes = 1; | |
0f113f3e | 607 | else |
d102d9df MC |
608 | numpipes = ((n - 1) / split_send_fragment) + 1; |
609 | if (numpipes > maxpipes) | |
610 | numpipes = maxpipes; | |
611 | ||
cf72c757 | 612 | if (n / numpipes >= max_send_fragment) { |
d102d9df MC |
613 | /* |
614 | * We have enough data to completely fill all available | |
615 | * pipelines | |
616 | */ | |
617 | for (j = 0; j < numpipes; j++) { | |
cf72c757 | 618 | pipelens[j] = max_send_fragment; |
d102d9df MC |
619 | } |
620 | } else { | |
621 | /* We can partially fill all available pipelines */ | |
622 | tmppipelen = n / numpipes; | |
623 | remain = n % numpipes; | |
624 | for (j = 0; j < numpipes; j++) { | |
625 | pipelens[j] = tmppipelen; | |
626 | if (j < remain) | |
627 | pipelens[j]++; | |
628 | } | |
629 | } | |
0f113f3e | 630 | |
7ee8627f MC |
631 | i = do_ssl3_write(s, type, &(buf[tot]), pipelens, numpipes, 0, |
632 | &tmpwrit); | |
0f113f3e | 633 | if (i <= 0) { |
c2853382 | 634 | /* SSLfatal() already called if appropriate */ |
0f113f3e | 635 | /* XXX should we ssl3_release_write_buffer if i<0? */ |
e2228d31 | 636 | s->rlayer.wnum = tot; |
0f113f3e MC |
637 | return i; |
638 | } | |
639 | ||
ff04799d | 640 | if (tmpwrit == n || |
0f113f3e MC |
641 | (type == SSL3_RT_APPLICATION_DATA && |
642 | (s->mode & SSL_MODE_ENABLE_PARTIAL_WRITE))) { | |
643 | /* | |
644 | * next chunk of data should get another prepended empty fragment | |
645 | * in ciphersuites with known-IV weakness: | |
646 | */ | |
555cbb32 | 647 | s->s3.empty_fragment_done = 0; |
0f113f3e | 648 | |
8bbf63e4 MC |
649 | if (tmpwrit == n |
650 | && (s->mode & SSL_MODE_RELEASE_BUFFERS) != 0 | |
651 | && !SSL_IS_DTLS(s)) | |
0f113f3e MC |
652 | ssl3_release_write_buffer(s); |
653 | ||
7ee8627f MC |
654 | *written = tot + tmpwrit; |
655 | return 1; | |
0f113f3e MC |
656 | } |
657 | ||
7ee8627f MC |
658 | n -= tmpwrit; |
659 | tot += tmpwrit; | |
0f113f3e MC |
660 | } |
661 | } | |
d02b48c6 | 662 | |
c103c7e2 | 663 | int do_ssl3_write(SSL *s, int type, const unsigned char *buf, |
7ee8627f MC |
664 | size_t *pipelens, size_t numpipes, |
665 | int create_empty_fragment, size_t *written) | |
0f113f3e | 666 | { |
c7c42022 | 667 | WPACKET pkt[SSL_MAX_PIPELINES]; |
d102d9df | 668 | SSL3_RECORD wr[SSL_MAX_PIPELINES]; |
44e58f3b MC |
669 | WPACKET *thispkt; |
670 | SSL3_RECORD *thiswr; | |
c7c42022 | 671 | unsigned char *recordstart; |
0f113f3e | 672 | int i, mac_size, clear = 0; |
7ee8627f | 673 | size_t prefix_len = 0; |
829754a6 | 674 | int eivlen = 0; |
f4bd5de5 | 675 | size_t align = 0; |
d102d9df | 676 | SSL3_BUFFER *wb; |
0f113f3e | 677 | SSL_SESSION *sess; |
c7c42022 | 678 | size_t totlen = 0, len, wpinited = 0; |
7ee8627f | 679 | size_t j; |
0f113f3e | 680 | |
d102d9df MC |
681 | for (j = 0; j < numpipes; j++) |
682 | totlen += pipelens[j]; | |
0f113f3e MC |
683 | /* |
684 | * first check if there is a SSL3_BUFFER still being written out. This | |
685 | * will happen with non blocking IO | |
686 | */ | |
c2853382 MC |
687 | if (RECORD_LAYER_write_pending(&s->rlayer)) { |
688 | /* Calls SSLfatal() as required */ | |
7ee8627f | 689 | return ssl3_write_pending(s, type, buf, totlen, written); |
c2853382 | 690 | } |
0f113f3e MC |
691 | |
692 | /* If we have an alert to send, lets send it */ | |
555cbb32 | 693 | if (s->s3.alert_dispatch) { |
0f113f3e | 694 | i = s->method->ssl_dispatch_alert(s); |
c2853382 MC |
695 | if (i <= 0) { |
696 | /* SSLfatal() already called if appropriate */ | |
26a7d938 | 697 | return i; |
c2853382 | 698 | } |
0f113f3e MC |
699 | /* if it went, fall through and send more stuff */ |
700 | } | |
701 | ||
c2853382 MC |
702 | if (s->rlayer.numwpipes < numpipes) { |
703 | if (!ssl3_setup_write_buffer(s, numpipes, 0)) { | |
704 | /* SSLfatal() already called */ | |
0f113f3e | 705 | return -1; |
c2853382 MC |
706 | } |
707 | } | |
0f113f3e | 708 | |
d102d9df | 709 | if (totlen == 0 && !create_empty_fragment) |
0f113f3e MC |
710 | return 0; |
711 | ||
0f113f3e MC |
712 | sess = s->session; |
713 | ||
714 | if ((sess == NULL) || | |
a230b26e | 715 | (s->enc_write_ctx == NULL) || (EVP_MD_CTX_md(s->write_hash) == NULL)) { |
0f113f3e | 716 | clear = s->enc_write_ctx ? 0 : 1; /* must be AEAD cipher */ |
0f113f3e MC |
717 | mac_size = 0; |
718 | } else { | |
7ee8627f | 719 | /* TODO(siz_t): Convert me */ |
0f113f3e | 720 | mac_size = EVP_MD_CTX_size(s->write_hash); |
c2853382 MC |
721 | if (mac_size < 0) { |
722 | SSLfatal(s, SSL_AD_INTERNAL_ERROR, SSL_F_DO_SSL3_WRITE, | |
723 | ERR_R_INTERNAL_ERROR); | |
0f113f3e | 724 | goto err; |
c2853382 | 725 | } |
0f113f3e | 726 | } |
d02b48c6 | 727 | |
0f113f3e MC |
728 | /* |
729 | * 'create_empty_fragment' is true only when this function calls itself | |
730 | */ | |
555cbb32 | 731 | if (!clear && !create_empty_fragment && !s->s3.empty_fragment_done) { |
0f113f3e MC |
732 | /* |
733 | * countermeasure against known-IV weakness in CBC ciphersuites (see | |
734 | * http://www.openssl.org/~bodo/tls-cbc.txt) | |
735 | */ | |
736 | ||
555cbb32 | 737 | if (s->s3.need_empty_fragments && type == SSL3_RT_APPLICATION_DATA) { |
0f113f3e MC |
738 | /* |
739 | * recursive function call with 'create_empty_fragment' set; this | |
740 | * prepares and buffers the data for an empty fragment (these | |
741 | * 'prefix_len' bytes are sent out later together with the actual | |
742 | * payload) | |
743 | */ | |
7ee8627f MC |
744 | size_t tmppipelen = 0; |
745 | int ret; | |
d102d9df | 746 | |
7ee8627f | 747 | ret = do_ssl3_write(s, type, buf, &tmppipelen, 1, 1, &prefix_len); |
c2853382 MC |
748 | if (ret <= 0) { |
749 | /* SSLfatal() already called if appropriate */ | |
0f113f3e | 750 | goto err; |
c2853382 | 751 | } |
0f113f3e MC |
752 | |
753 | if (prefix_len > | |
a230b26e | 754 | (SSL3_RT_HEADER_LENGTH + SSL3_RT_SEND_MAX_ENCRYPTED_OVERHEAD)) { |
0f113f3e | 755 | /* insufficient space */ |
c2853382 MC |
756 | SSLfatal(s, SSL_AD_INTERNAL_ERROR, SSL_F_DO_SSL3_WRITE, |
757 | ERR_R_INTERNAL_ERROR); | |
0f113f3e MC |
758 | goto err; |
759 | } | |
760 | } | |
761 | ||
555cbb32 | 762 | s->s3.empty_fragment_done = 1; |
0f113f3e MC |
763 | } |
764 | ||
50ec7505 BP |
765 | if (BIO_get_ktls_send(s->wbio)) { |
766 | /* | |
767 | * ktls doesn't modify the buffer, but to avoid a warning we need to | |
768 | * discard the const qualifier. | |
769 | * This doesn't leak memory because the buffers have been released when | |
770 | * switching to ktls. | |
771 | */ | |
772 | SSL3_BUFFER_set_buf(&s->rlayer.wbuf[0], (unsigned char *)buf); | |
773 | SSL3_BUFFER_set_offset(&s->rlayer.wbuf[0], 0); | |
074a6e86 | 774 | SSL3_BUFFER_set_app_buffer(&s->rlayer.wbuf[0], 1); |
50ec7505 BP |
775 | goto wpacket_init_complete; |
776 | } | |
777 | ||
0f113f3e | 778 | if (create_empty_fragment) { |
d102d9df | 779 | wb = &s->rlayer.wbuf[0]; |
a4d64c7f | 780 | #if defined(SSL3_ALIGN_PAYLOAD) && SSL3_ALIGN_PAYLOAD!=0 |
0f113f3e MC |
781 | /* |
782 | * extra fragment would be couple of cipher blocks, which would be | |
783 | * multiple of SSL3_ALIGN_PAYLOAD, so if we want to align the real | |
8483a003 | 784 | * payload, then we can just pretend we simply have two headers. |
0f113f3e | 785 | */ |
f4bd5de5 | 786 | align = (size_t)SSL3_BUFFER_get_buf(wb) + 2 * SSL3_RT_HEADER_LENGTH; |
753be41d | 787 | align = SSL3_ALIGN_PAYLOAD - 1 - ((align - 1) % SSL3_ALIGN_PAYLOAD); |
a4d64c7f | 788 | #endif |
747e1639 | 789 | SSL3_BUFFER_set_offset(wb, align); |
c7c42022 MC |
790 | if (!WPACKET_init_static_len(&pkt[0], SSL3_BUFFER_get_buf(wb), |
791 | SSL3_BUFFER_get_len(wb), 0) | |
792 | || !WPACKET_allocate_bytes(&pkt[0], align, NULL)) { | |
c2853382 MC |
793 | SSLfatal(s, SSL_AD_INTERNAL_ERROR, SSL_F_DO_SSL3_WRITE, |
794 | ERR_R_INTERNAL_ERROR); | |
c7c42022 MC |
795 | goto err; |
796 | } | |
797 | wpinited = 1; | |
0f113f3e | 798 | } else if (prefix_len) { |
d102d9df | 799 | wb = &s->rlayer.wbuf[0]; |
44e58f3b MC |
800 | if (!WPACKET_init_static_len(&pkt[0], |
801 | SSL3_BUFFER_get_buf(wb), | |
c7c42022 MC |
802 | SSL3_BUFFER_get_len(wb), 0) |
803 | || !WPACKET_allocate_bytes(&pkt[0], SSL3_BUFFER_get_offset(wb) | |
804 | + prefix_len, NULL)) { | |
c2853382 MC |
805 | SSLfatal(s, SSL_AD_INTERNAL_ERROR, SSL_F_DO_SSL3_WRITE, |
806 | ERR_R_INTERNAL_ERROR); | |
c7c42022 MC |
807 | goto err; |
808 | } | |
809 | wpinited = 1; | |
0f113f3e | 810 | } else { |
a230b26e | 811 | for (j = 0; j < numpipes; j++) { |
44e58f3b MC |
812 | thispkt = &pkt[j]; |
813 | ||
d102d9df | 814 | wb = &s->rlayer.wbuf[j]; |
829754a6 | 815 | #if defined(SSL3_ALIGN_PAYLOAD) && SSL3_ALIGN_PAYLOAD != 0 |
d102d9df | 816 | align = (size_t)SSL3_BUFFER_get_buf(wb) + SSL3_RT_HEADER_LENGTH; |
753be41d | 817 | align = SSL3_ALIGN_PAYLOAD - 1 - ((align - 1) % SSL3_ALIGN_PAYLOAD); |
a4d64c7f | 818 | #endif |
d102d9df | 819 | SSL3_BUFFER_set_offset(wb, align); |
44e58f3b | 820 | if (!WPACKET_init_static_len(thispkt, SSL3_BUFFER_get_buf(wb), |
c7c42022 | 821 | SSL3_BUFFER_get_len(wb), 0) |
44e58f3b | 822 | || !WPACKET_allocate_bytes(thispkt, align, NULL)) { |
c2853382 MC |
823 | SSLfatal(s, SSL_AD_INTERNAL_ERROR, SSL_F_DO_SSL3_WRITE, |
824 | ERR_R_INTERNAL_ERROR); | |
c7c42022 MC |
825 | goto err; |
826 | } | |
827 | wpinited++; | |
d102d9df | 828 | } |
0f113f3e MC |
829 | } |
830 | ||
0f113f3e | 831 | /* Explicit IV length, block ciphers appropriate version flag */ |
49e7fe12 | 832 | if (s->enc_write_ctx && SSL_USE_EXPLICIT_IV(s) && !SSL_TREAT_AS_TLS13(s)) { |
0f113f3e MC |
833 | int mode = EVP_CIPHER_CTX_mode(s->enc_write_ctx); |
834 | if (mode == EVP_CIPH_CBC_MODE) { | |
7ee8627f | 835 | /* TODO(size_t): Convert me */ |
0f113f3e MC |
836 | eivlen = EVP_CIPHER_CTX_iv_length(s->enc_write_ctx); |
837 | if (eivlen <= 1) | |
838 | eivlen = 0; | |
c7c42022 MC |
839 | } else if (mode == EVP_CIPH_GCM_MODE) { |
840 | /* Need explicit part of IV for GCM mode */ | |
0f113f3e | 841 | eivlen = EVP_GCM_TLS_EXPLICIT_IV_LEN; |
c7c42022 | 842 | } else if (mode == EVP_CIPH_CCM_MODE) { |
e75c5a79 | 843 | eivlen = EVP_CCM_TLS_EXPLICIT_IV_LEN; |
c7c42022 | 844 | } |
c7c42022 | 845 | } |
0f113f3e | 846 | |
50ec7505 BP |
847 | wpacket_init_complete: |
848 | ||
d102d9df MC |
849 | totlen = 0; |
850 | /* Clear our SSL3_RECORD structures */ | |
cbe29648 | 851 | memset(wr, 0, sizeof(wr)); |
a230b26e | 852 | for (j = 0; j < numpipes; j++) { |
de9e884b MC |
853 | unsigned int version = (s->version == TLS1_3_VERSION) ? TLS1_2_VERSION |
854 | : s->version; | |
e8eb224b | 855 | unsigned char *compressdata = NULL; |
c7c42022 | 856 | size_t maxcomplen; |
e60ce9c4 | 857 | unsigned int rectype; |
0f113f3e | 858 | |
44e58f3b MC |
859 | thispkt = &pkt[j]; |
860 | thiswr = &wr[j]; | |
861 | ||
e60ce9c4 MC |
862 | /* |
863 | * In TLSv1.3, once encrypting, we always use application data for the | |
864 | * record type | |
865 | */ | |
7426cd34 MC |
866 | if (SSL_TREAT_AS_TLS13(s) |
867 | && s->enc_write_ctx != NULL | |
868 | && (s->statem.enc_write_state != ENC_WRITE_STATE_WRITE_PLAIN_ALERTS | |
869 | || type != SSL3_RT_ALERT)) | |
e60ce9c4 MC |
870 | rectype = SSL3_RT_APPLICATION_DATA; |
871 | else | |
872 | rectype = type; | |
3295d242 MC |
873 | SSL3_RECORD_set_type(thiswr, rectype); |
874 | ||
d102d9df | 875 | /* |
8483a003 | 876 | * Some servers hang if initial client hello is larger than 256 bytes |
d102d9df MC |
877 | * and record version number > TLS 1.0 |
878 | */ | |
879 | if (SSL_get_state(s) == TLS_ST_CW_CLNT_HELLO | |
5f7470df MC |
880 | && !s->renegotiate |
881 | && TLS1_get_version(s) > TLS1_VERSION | |
882 | && s->hello_retry_request == SSL_HRR_NONE) | |
c7c42022 | 883 | version = TLS1_VERSION; |
3295d242 | 884 | SSL3_RECORD_set_rec_version(thiswr, version); |
0f113f3e | 885 | |
44e58f3b MC |
886 | maxcomplen = pipelens[j]; |
887 | if (s->compress != NULL) | |
f33f9dde | 888 | maxcomplen += SSL3_RT_MAX_COMPRESSED_OVERHEAD; |
44e58f3b | 889 | |
50ec7505 BP |
890 | /* |
891 | * When using offload kernel will write the header. | |
892 | * Otherwise write the header now | |
893 | */ | |
894 | if (!BIO_get_ktls_send(s->wbio) | |
895 | && (!WPACKET_put_bytes_u8(thispkt, rectype) | |
44e58f3b MC |
896 | || !WPACKET_put_bytes_u16(thispkt, version) |
897 | || !WPACKET_start_sub_packet_u16(thispkt) | |
c7c42022 | 898 | || (eivlen > 0 |
44e58f3b | 899 | && !WPACKET_allocate_bytes(thispkt, eivlen, NULL)) |
c7c42022 | 900 | || (maxcomplen > 0 |
44e58f3b | 901 | && !WPACKET_reserve_bytes(thispkt, maxcomplen, |
50ec7505 | 902 | &compressdata)))) { |
c2853382 MC |
903 | SSLfatal(s, SSL_AD_INTERNAL_ERROR, SSL_F_DO_SSL3_WRITE, |
904 | ERR_R_INTERNAL_ERROR); | |
c7c42022 MC |
905 | goto err; |
906 | } | |
0f113f3e | 907 | |
d102d9df | 908 | /* lets setup the record stuff. */ |
44e58f3b MC |
909 | SSL3_RECORD_set_data(thiswr, compressdata); |
910 | SSL3_RECORD_set_length(thiswr, pipelens[j]); | |
911 | SSL3_RECORD_set_input(thiswr, (unsigned char *)&buf[totlen]); | |
d102d9df | 912 | totlen += pipelens[j]; |
0f113f3e | 913 | |
d102d9df | 914 | /* |
44e58f3b MC |
915 | * we now 'read' from thiswr->input, thiswr->length bytes into |
916 | * thiswr->data | |
d102d9df | 917 | */ |
0f113f3e | 918 | |
d102d9df MC |
919 | /* first we compress */ |
920 | if (s->compress != NULL) { | |
44e58f3b MC |
921 | if (!ssl3_do_compress(s, thiswr) |
922 | || !WPACKET_allocate_bytes(thispkt, thiswr->length, NULL)) { | |
c2853382 MC |
923 | SSLfatal(s, SSL_AD_INTERNAL_ERROR, SSL_F_DO_SSL3_WRITE, |
924 | SSL_R_COMPRESSION_FAILURE); | |
d102d9df MC |
925 | goto err; |
926 | } | |
927 | } else { | |
50ec7505 BP |
928 | if (BIO_get_ktls_send(s->wbio)) { |
929 | SSL3_RECORD_reset_data(&wr[j]); | |
930 | } else { | |
931 | if (!WPACKET_memcpy(thispkt, thiswr->input, thiswr->length)) { | |
932 | SSLfatal(s, SSL_AD_INTERNAL_ERROR, SSL_F_DO_SSL3_WRITE, | |
933 | ERR_R_INTERNAL_ERROR); | |
934 | goto err; | |
935 | } | |
936 | SSL3_RECORD_reset_input(&wr[j]); | |
c7c42022 | 937 | } |
d102d9df | 938 | } |
0f113f3e | 939 | |
7426cd34 MC |
940 | if (SSL_TREAT_AS_TLS13(s) |
941 | && s->enc_write_ctx != NULL | |
942 | && (s->statem.enc_write_state != ENC_WRITE_STATE_WRITE_PLAIN_ALERTS | |
943 | || type != SSL3_RT_ALERT)) { | |
cf72c757 | 944 | size_t rlen, max_send_fragment; |
c649d10d | 945 | |
44e58f3b | 946 | if (!WPACKET_put_bytes_u8(thispkt, type)) { |
c2853382 MC |
947 | SSLfatal(s, SSL_AD_INTERNAL_ERROR, SSL_F_DO_SSL3_WRITE, |
948 | ERR_R_INTERNAL_ERROR); | |
e60ce9c4 MC |
949 | goto err; |
950 | } | |
44e58f3b | 951 | SSL3_RECORD_add_length(thiswr, 1); |
c649d10d TS |
952 | |
953 | /* Add TLS1.3 padding */ | |
cf72c757 | 954 | max_send_fragment = ssl_get_max_send_fragment(s); |
96c9aee2 | 955 | rlen = SSL3_RECORD_get_length(thiswr); |
cf72c757 | 956 | if (rlen < max_send_fragment) { |
96c9aee2 | 957 | size_t padding = 0; |
cf72c757 | 958 | size_t max_padding = max_send_fragment - rlen; |
96c9aee2 TS |
959 | if (s->record_padding_cb != NULL) { |
960 | padding = s->record_padding_cb(s, type, rlen, s->record_padding_arg); | |
961 | } else if (s->block_padding > 0) { | |
962 | size_t mask = s->block_padding - 1; | |
963 | size_t remainder; | |
964 | ||
965 | /* optimize for power of 2 */ | |
966 | if ((s->block_padding & mask) == 0) | |
967 | remainder = rlen & mask; | |
968 | else | |
969 | remainder = rlen % s->block_padding; | |
970 | /* don't want to add a block of padding if we don't have to */ | |
971 | if (remainder == 0) | |
972 | padding = 0; | |
973 | else | |
974 | padding = s->block_padding - remainder; | |
975 | } | |
976 | if (padding > 0) { | |
977 | /* do not allow the record to exceed max plaintext length */ | |
978 | if (padding > max_padding) | |
979 | padding = max_padding; | |
980 | if (!WPACKET_memset(thispkt, 0, padding)) { | |
c2853382 MC |
981 | SSLfatal(s, SSL_AD_INTERNAL_ERROR, SSL_F_DO_SSL3_WRITE, |
982 | ERR_R_INTERNAL_ERROR); | |
96c9aee2 TS |
983 | goto err; |
984 | } | |
985 | SSL3_RECORD_add_length(thiswr, padding); | |
c649d10d | 986 | } |
c649d10d | 987 | } |
e60ce9c4 MC |
988 | } |
989 | ||
0f113f3e | 990 | /* |
44e58f3b MC |
991 | * we should still have the output to thiswr->data and the input from |
992 | * wr->input. Length should be thiswr->length. thiswr->data still points | |
993 | * in the wb->buf | |
0f113f3e | 994 | */ |
0f113f3e | 995 | |
f059e4cc | 996 | if (!BIO_get_ktls_send(s->wbio) && !SSL_WRITE_ETM(s) && mac_size != 0) { |
c7c42022 MC |
997 | unsigned char *mac; |
998 | ||
44e58f3b MC |
999 | if (!WPACKET_allocate_bytes(thispkt, mac_size, &mac) |
1000 | || !s->method->ssl3_enc->mac(s, thiswr, mac, 1)) { | |
c2853382 MC |
1001 | SSLfatal(s, SSL_AD_INTERNAL_ERROR, SSL_F_DO_SSL3_WRITE, |
1002 | ERR_R_INTERNAL_ERROR); | |
d102d9df | 1003 | goto err; |
c7c42022 MC |
1004 | } |
1005 | } | |
1006 | ||
1007 | /* | |
1008 | * Reserve some bytes for any growth that may occur during encryption. | |
1009 | * This will be at most one cipher block or the tag length if using | |
1010 | * AEAD. SSL_RT_MAX_CIPHER_BLOCK_SIZE covers either case. | |
1011 | */ | |
50ec7505 BP |
1012 | if (!BIO_get_ktls_send(s->wbio)) { |
1013 | if (!WPACKET_reserve_bytes(thispkt, | |
1014 | SSL_RT_MAX_CIPHER_BLOCK_SIZE, | |
1015 | NULL) | |
1016 | /* | |
1017 | * We also need next the amount of bytes written to this | |
1018 | * sub-packet | |
1019 | */ | |
44e58f3b | 1020 | || !WPACKET_get_length(thispkt, &len)) { |
c2853382 MC |
1021 | SSLfatal(s, SSL_AD_INTERNAL_ERROR, SSL_F_DO_SSL3_WRITE, |
1022 | ERR_R_INTERNAL_ERROR); | |
c7c42022 | 1023 | goto err; |
50ec7505 | 1024 | } |
c7c42022 | 1025 | |
50ec7505 BP |
1026 | /* Get a pointer to the start of this record excluding header */ |
1027 | recordstart = WPACKET_get_curr(thispkt) - len; | |
1028 | SSL3_RECORD_set_data(thiswr, recordstart); | |
1029 | SSL3_RECORD_reset_input(thiswr); | |
1030 | SSL3_RECORD_set_length(thiswr, len); | |
1031 | } | |
0f113f3e MC |
1032 | } |
1033 | ||
7426cd34 | 1034 | if (s->statem.enc_write_state == ENC_WRITE_STATE_WRITE_PLAIN_ALERTS) { |
49e7fe12 MC |
1035 | /* |
1036 | * We haven't actually negotiated the version yet, but we're trying to | |
3519bae5 | 1037 | * send early data - so we need to use the tls13enc function. |
49e7fe12 | 1038 | */ |
c2853382 | 1039 | if (tls13_enc(s, wr, numpipes, 1) < 1) { |
921d84a0 MC |
1040 | if (!ossl_statem_in_error(s)) { |
1041 | SSLfatal(s, SSL_AD_INTERNAL_ERROR, SSL_F_DO_SSL3_WRITE, | |
1042 | ERR_R_INTERNAL_ERROR); | |
1043 | } | |
49e7fe12 | 1044 | goto err; |
c2853382 | 1045 | } |
49e7fe12 | 1046 | } else { |
50ec7505 BP |
1047 | if (!BIO_get_ktls_send(s->wbio)) { |
1048 | if (s->method->ssl3_enc->enc(s, wr, numpipes, 1) < 1) { | |
1049 | if (!ossl_statem_in_error(s)) { | |
1050 | SSLfatal(s, SSL_AD_INTERNAL_ERROR, SSL_F_DO_SSL3_WRITE, | |
1051 | ERR_R_INTERNAL_ERROR); | |
1052 | } | |
1053 | goto err; | |
921d84a0 | 1054 | } |
c2853382 | 1055 | } |
49e7fe12 | 1056 | } |
0f113f3e | 1057 | |
a230b26e | 1058 | for (j = 0; j < numpipes; j++) { |
c7c42022 MC |
1059 | size_t origlen; |
1060 | ||
44e58f3b MC |
1061 | thispkt = &pkt[j]; |
1062 | thiswr = &wr[j]; | |
1063 | ||
50ec7505 BP |
1064 | if (BIO_get_ktls_send(s->wbio)) |
1065 | goto mac_done; | |
1066 | ||
c7c42022 | 1067 | /* Allocate bytes for the encryption overhead */ |
44e58f3b | 1068 | if (!WPACKET_get_length(thispkt, &origlen) |
c7c42022 | 1069 | /* Encryption should never shrink the data! */ |
44e58f3b MC |
1070 | || origlen > thiswr->length |
1071 | || (thiswr->length > origlen | |
1072 | && !WPACKET_allocate_bytes(thispkt, | |
50ec7505 BP |
1073 | thiswr->length - origlen, |
1074 | NULL))) { | |
c2853382 MC |
1075 | SSLfatal(s, SSL_AD_INTERNAL_ERROR, SSL_F_DO_SSL3_WRITE, |
1076 | ERR_R_INTERNAL_ERROR); | |
c7c42022 MC |
1077 | goto err; |
1078 | } | |
28a31a0a | 1079 | if (SSL_WRITE_ETM(s) && mac_size != 0) { |
c7c42022 MC |
1080 | unsigned char *mac; |
1081 | ||
44e58f3b MC |
1082 | if (!WPACKET_allocate_bytes(thispkt, mac_size, &mac) |
1083 | || !s->method->ssl3_enc->mac(s, thiswr, mac, 1)) { | |
c2853382 MC |
1084 | SSLfatal(s, SSL_AD_INTERNAL_ERROR, SSL_F_DO_SSL3_WRITE, |
1085 | ERR_R_INTERNAL_ERROR); | |
d102d9df | 1086 | goto err; |
c7c42022 | 1087 | } |
44e58f3b | 1088 | SSL3_RECORD_add_length(thiswr, mac_size); |
d102d9df | 1089 | } |
0f113f3e | 1090 | |
44e58f3b MC |
1091 | if (!WPACKET_get_length(thispkt, &len) |
1092 | || !WPACKET_close(thispkt)) { | |
c2853382 MC |
1093 | SSLfatal(s, SSL_AD_INTERNAL_ERROR, SSL_F_DO_SSL3_WRITE, |
1094 | ERR_R_INTERNAL_ERROR); | |
c7c42022 MC |
1095 | goto err; |
1096 | } | |
d102d9df | 1097 | |
c7c42022 | 1098 | if (s->msg_callback) { |
44e58f3b | 1099 | recordstart = WPACKET_get_curr(thispkt) - len |
c7c42022 MC |
1100 | - SSL3_RT_HEADER_LENGTH; |
1101 | s->msg_callback(1, 0, SSL3_RT_HEADER, recordstart, | |
1102 | SSL3_RT_HEADER_LENGTH, s, | |
d102d9df | 1103 | s->msg_callback_arg); |
ad5100bc MC |
1104 | |
1105 | if (SSL_TREAT_AS_TLS13(s) && s->enc_write_ctx != NULL) { | |
1106 | unsigned char ctype = type; | |
1107 | ||
1108 | s->msg_callback(1, s->version, SSL3_RT_INNER_CONTENT_TYPE, | |
1109 | &ctype, 1, s, s->msg_callback_arg); | |
1110 | } | |
c7c42022 MC |
1111 | } |
1112 | ||
44e58f3b | 1113 | if (!WPACKET_finish(thispkt)) { |
c2853382 MC |
1114 | SSLfatal(s, SSL_AD_INTERNAL_ERROR, SSL_F_DO_SSL3_WRITE, |
1115 | ERR_R_INTERNAL_ERROR); | |
c7c42022 MC |
1116 | goto err; |
1117 | } | |
0f113f3e | 1118 | |
50ec7505 BP |
1119 | /* header is added by the kernel when using offload */ |
1120 | SSL3_RECORD_add_length(&wr[j], SSL3_RT_HEADER_LENGTH); | |
d102d9df MC |
1121 | |
1122 | if (create_empty_fragment) { | |
1123 | /* | |
1124 | * we are in a recursive call; just return the length, don't write | |
1125 | * out anything here | |
1126 | */ | |
1127 | if (j > 0) { | |
1128 | /* We should never be pipelining an empty fragment!! */ | |
c2853382 MC |
1129 | SSLfatal(s, SSL_AD_INTERNAL_ERROR, SSL_F_DO_SSL3_WRITE, |
1130 | ERR_R_INTERNAL_ERROR); | |
d102d9df MC |
1131 | goto err; |
1132 | } | |
44e58f3b | 1133 | *written = SSL3_RECORD_get_length(thiswr); |
7ee8627f | 1134 | return 1; |
d102d9df MC |
1135 | } |
1136 | ||
50ec7505 BP |
1137 | mac_done: |
1138 | /* | |
1139 | * we should now have thiswr->data pointing to the encrypted data, which | |
1140 | * is thiswr->length long | |
1141 | */ | |
1142 | SSL3_RECORD_set_type(thiswr, type); /* not needed but helps for | |
1143 | * debugging */ | |
1144 | ||
d102d9df MC |
1145 | /* now let's set up wb */ |
1146 | SSL3_BUFFER_set_left(&s->rlayer.wbuf[j], | |
44e58f3b | 1147 | prefix_len + SSL3_RECORD_get_length(thiswr)); |
0f113f3e MC |
1148 | } |
1149 | ||
0f113f3e MC |
1150 | /* |
1151 | * memorize arguments so that ssl3_write_pending can detect bad write | |
1152 | * retries later | |
1153 | */ | |
d102d9df | 1154 | s->rlayer.wpend_tot = totlen; |
f8caa3c8 MC |
1155 | s->rlayer.wpend_buf = buf; |
1156 | s->rlayer.wpend_type = type; | |
d102d9df | 1157 | s->rlayer.wpend_ret = totlen; |
0f113f3e MC |
1158 | |
1159 | /* we now just need to write the buffer */ | |
7ee8627f | 1160 | return ssl3_write_pending(s, type, buf, totlen, written); |
0f113f3e | 1161 | err: |
c7c42022 MC |
1162 | for (j = 0; j < wpinited; j++) |
1163 | WPACKET_cleanup(&pkt[j]); | |
0f113f3e MC |
1164 | return -1; |
1165 | } | |
d02b48c6 | 1166 | |
555cbb32 | 1167 | /* if s->s3.wbuf.left != 0, we need to call this |
4880672a | 1168 | * |
beacb0f0 | 1169 | * Return values are as per SSL_write() |
4880672a | 1170 | */ |
7ee8627f MC |
1171 | int ssl3_write_pending(SSL *s, int type, const unsigned char *buf, size_t len, |
1172 | size_t *written) | |
0f113f3e MC |
1173 | { |
1174 | int i; | |
d102d9df | 1175 | SSL3_BUFFER *wb = s->rlayer.wbuf; |
7ee8627f | 1176 | size_t currbuf = 0; |
f0ca8f89 | 1177 | size_t tmpwrit = 0; |
d02b48c6 | 1178 | |
7ee8627f | 1179 | if ((s->rlayer.wpend_tot > len) |
ebc20cfa BE |
1180 | || (!(s->mode & SSL_MODE_ACCEPT_MOVING_WRITE_BUFFER) |
1181 | && (s->rlayer.wpend_buf != buf)) | |
f8caa3c8 | 1182 | || (s->rlayer.wpend_type != type)) { |
c2853382 MC |
1183 | SSLfatal(s, SSL_AD_INTERNAL_ERROR, SSL_F_SSL3_WRITE_PENDING, |
1184 | SSL_R_BAD_WRITE_RETRY); | |
7ee8627f | 1185 | return -1; |
0f113f3e MC |
1186 | } |
1187 | ||
1188 | for (;;) { | |
d102d9df MC |
1189 | /* Loop until we find a buffer we haven't written out yet */ |
1190 | if (SSL3_BUFFER_get_left(&wb[currbuf]) == 0 | |
a230b26e | 1191 | && currbuf < s->rlayer.numwpipes - 1) { |
d102d9df MC |
1192 | currbuf++; |
1193 | continue; | |
1194 | } | |
0f113f3e MC |
1195 | clear_sys_error(); |
1196 | if (s->wbio != NULL) { | |
1197 | s->rwstate = SSL_WRITING; | |
50ec7505 BP |
1198 | |
1199 | /* | |
1200 | * To prevent coalescing of control and data messages, | |
1201 | * such as in buffer_write, we flush the BIO | |
1202 | */ | |
1203 | if (BIO_get_ktls_send(s->wbio) && type != SSL3_RT_APPLICATION_DATA) { | |
1204 | i = BIO_flush(s->wbio); | |
1205 | if (i <= 0) | |
1206 | return i; | |
1207 | } | |
1208 | ||
1209 | if (BIO_get_ktls_send(s->wbio) | |
1210 | && type != SSL3_RT_APPLICATION_DATA) { | |
1211 | BIO_set_ktls_ctrl_msg(s->wbio, type); | |
1212 | } | |
7ee8627f | 1213 | /* TODO(size_t): Convert this call */ |
a230b26e EK |
1214 | i = BIO_write(s->wbio, (char *) |
1215 | &(SSL3_BUFFER_get_buf(&wb[currbuf]) | |
1216 | [SSL3_BUFFER_get_offset(&wb[currbuf])]), | |
1217 | (unsigned int)SSL3_BUFFER_get_left(&wb[currbuf])); | |
7ee8627f MC |
1218 | if (i >= 0) |
1219 | tmpwrit = i; | |
0f113f3e | 1220 | } else { |
c2853382 MC |
1221 | SSLfatal(s, SSL_AD_INTERNAL_ERROR, SSL_F_SSL3_WRITE_PENDING, |
1222 | SSL_R_BIO_NOT_SET); | |
0f113f3e MC |
1223 | i = -1; |
1224 | } | |
7ee8627f | 1225 | if (i > 0 && tmpwrit == SSL3_BUFFER_get_left(&wb[currbuf])) { |
d102d9df | 1226 | SSL3_BUFFER_set_left(&wb[currbuf], 0); |
7ee8627f | 1227 | SSL3_BUFFER_add_offset(&wb[currbuf], tmpwrit); |
d102d9df MC |
1228 | if (currbuf + 1 < s->rlayer.numwpipes) |
1229 | continue; | |
0f113f3e | 1230 | s->rwstate = SSL_NOTHING; |
7ee8627f MC |
1231 | *written = s->rlayer.wpend_ret; |
1232 | return 1; | |
0f113f3e | 1233 | } else if (i <= 0) { |
5e8b24db | 1234 | if (SSL_IS_DTLS(s)) { |
0f113f3e MC |
1235 | /* |
1236 | * For DTLS, just drop it. That's kind of the whole point in | |
1237 | * using a datagram service | |
1238 | */ | |
d102d9df | 1239 | SSL3_BUFFER_set_left(&wb[currbuf], 0); |
0f113f3e | 1240 | } |
26a7d938 | 1241 | return i; |
0f113f3e | 1242 | } |
7ee8627f MC |
1243 | SSL3_BUFFER_add_offset(&wb[currbuf], tmpwrit); |
1244 | SSL3_BUFFER_sub_left(&wb[currbuf], tmpwrit); | |
0f113f3e MC |
1245 | } |
1246 | } | |
d02b48c6 | 1247 | |
1d97c843 TH |
1248 | /*- |
1249 | * Return up to 'len' payload bytes received in 'type' records. | |
b35e9050 BM |
1250 | * 'type' is one of the following: |
1251 | * | |
1252 | * - SSL3_RT_HANDSHAKE (when ssl3_get_message calls us) | |
1253 | * - SSL3_RT_APPLICATION_DATA (when ssl3_read calls us) | |
1254 | * - 0 (during a shutdown, no data has to be returned) | |
1255 | * | |
1256 | * If we don't have stored data to work from, read a SSL/TLS record first | |
1257 | * (possibly multiple records if we still don't have anything to return). | |
1258 | * | |
1259 | * This function must handle any surprises the peer may have for us, such as | |
657da85e MC |
1260 | * Alert records (e.g. close_notify) or renegotiation requests. ChangeCipherSpec |
1261 | * messages are treated as if they were handshake messages *if* the |recd_type| | |
1262 | * argument is non NULL. | |
b35e9050 BM |
1263 | * Also if record payloads contain fragments too small to process, we store |
1264 | * them until there is enough for the respective protocol (the record protocol | |
1265 | * may use arbitrary fragmentation and even interleaving): | |
1266 | * Change cipher spec protocol | |
1267 | * just 1 byte needed, no need for keeping anything stored | |
1268 | * Alert protocol | |
1269 | * 2 bytes needed (AlertLevel, AlertDescription) | |
1270 | * Handshake protocol | |
1271 | * 4 bytes needed (HandshakeType, uint24 length) -- we just have | |
1272 | * to detect unexpected Client Hello and Hello Request messages | |
1273 | * here, anything else is handled by higher layers | |
1274 | * Application data protocol | |
1275 | * none of our business | |
1276 | */ | |
657da85e | 1277 | int ssl3_read_bytes(SSL *s, int type, int *recvd_type, unsigned char *buf, |
54105ddd | 1278 | size_t len, int peek, size_t *readbytes) |
0f113f3e | 1279 | { |
99dd3740 | 1280 | int i, j, ret; |
54105ddd | 1281 | size_t n, curr_rec, num_recs, totalbytes; |
0f113f3e | 1282 | SSL3_RECORD *rr; |
94777c9c | 1283 | SSL3_BUFFER *rbuf; |
0f113f3e | 1284 | void (*cb) (const SSL *ssl, int type2, int val) = NULL; |
bcf2907c | 1285 | int is_tls13 = SSL_IS_TLS13(s); |
0f113f3e | 1286 | |
94777c9c MC |
1287 | rbuf = &s->rlayer.rbuf; |
1288 | ||
1289 | if (!SSL3_BUFFER_is_initialised(rbuf)) { | |
28d59af8 | 1290 | /* Not initialized yet */ |
196f2cbb MC |
1291 | if (!ssl3_setup_read_buffer(s)) { |
1292 | /* SSLfatal() already called */ | |
eda75751 | 1293 | return -1; |
196f2cbb | 1294 | } |
28d59af8 | 1295 | } |
0f113f3e MC |
1296 | |
1297 | if ((type && (type != SSL3_RT_APPLICATION_DATA) | |
1298 | && (type != SSL3_RT_HANDSHAKE)) || (peek | |
1299 | && (type != | |
1300 | SSL3_RT_APPLICATION_DATA))) { | |
99dd3740 MC |
1301 | SSLfatal(s, SSL_AD_INTERNAL_ERROR, SSL_F_SSL3_READ_BYTES, |
1302 | ERR_R_INTERNAL_ERROR); | |
0f113f3e MC |
1303 | return -1; |
1304 | } | |
1305 | ||
4aa7389e | 1306 | if ((type == SSL3_RT_HANDSHAKE) && (s->rlayer.handshake_fragment_len > 0)) |
0f113f3e MC |
1307 | /* (partially) satisfy request from storage */ |
1308 | { | |
4aa7389e | 1309 | unsigned char *src = s->rlayer.handshake_fragment; |
0f113f3e MC |
1310 | unsigned char *dst = buf; |
1311 | unsigned int k; | |
1312 | ||
1313 | /* peek == 0 */ | |
1314 | n = 0; | |
4aa7389e | 1315 | while ((len > 0) && (s->rlayer.handshake_fragment_len > 0)) { |
0f113f3e MC |
1316 | *dst++ = *src++; |
1317 | len--; | |
4aa7389e | 1318 | s->rlayer.handshake_fragment_len--; |
0f113f3e MC |
1319 | n++; |
1320 | } | |
1321 | /* move any remaining fragment bytes: */ | |
4aa7389e MC |
1322 | for (k = 0; k < s->rlayer.handshake_fragment_len; k++) |
1323 | s->rlayer.handshake_fragment[k] = *src++; | |
e9f6b9a1 MC |
1324 | |
1325 | if (recvd_type != NULL) | |
1326 | *recvd_type = SSL3_RT_HANDSHAKE; | |
1327 | ||
54105ddd | 1328 | *readbytes = n; |
eda75751 | 1329 | return 1; |
0f113f3e MC |
1330 | } |
1331 | ||
1332 | /* | |
4aa7389e | 1333 | * Now s->rlayer.handshake_fragment_len == 0 if type == SSL3_RT_HANDSHAKE. |
0f113f3e MC |
1334 | */ |
1335 | ||
024f543c | 1336 | if (!ossl_statem_get_in_handshake(s) && SSL_in_init(s)) { |
0f113f3e MC |
1337 | /* type == SSL3_RT_APPLICATION_DATA */ |
1338 | i = s->handshake_func(s); | |
99dd3740 | 1339 | /* SSLfatal() already called */ |
0f113f3e | 1340 | if (i < 0) |
eda75751 | 1341 | return i; |
99dd3740 | 1342 | if (i == 0) |
eda75751 | 1343 | return -1; |
0f113f3e MC |
1344 | } |
1345 | start: | |
1346 | s->rwstate = SSL_NOTHING; | |
1347 | ||
50e735f9 | 1348 | /*- |
94777c9c MC |
1349 | * For each record 'i' up to |num_recs] |
1350 | * rr[i].type - is the type of record | |
1351 | * rr[i].data, - data | |
1352 | * rr[i].off, - offset into 'data' for next read | |
1353 | * rr[i].length, - number of bytes. | |
50e735f9 | 1354 | */ |
94777c9c MC |
1355 | rr = s->rlayer.rrec; |
1356 | num_recs = RECORD_LAYER_get_numrpipes(&s->rlayer); | |
1357 | ||
1358 | do { | |
1359 | /* get new records if necessary */ | |
1360 | if (num_recs == 0) { | |
1361 | ret = ssl3_get_record(s); | |
99dd3740 MC |
1362 | if (ret <= 0) { |
1363 | /* SSLfatal() already called if appropriate */ | |
eda75751 | 1364 | return ret; |
99dd3740 | 1365 | } |
94777c9c MC |
1366 | num_recs = RECORD_LAYER_get_numrpipes(&s->rlayer); |
1367 | if (num_recs == 0) { | |
1368 | /* Shouldn't happen */ | |
99dd3740 MC |
1369 | SSLfatal(s, SSL_AD_INTERNAL_ERROR, SSL_F_SSL3_READ_BYTES, |
1370 | ERR_R_INTERNAL_ERROR); | |
1371 | return -1; | |
94777c9c MC |
1372 | } |
1373 | } | |
255cfeac | 1374 | /* Skip over any records we have already read */ |
94777c9c | 1375 | for (curr_rec = 0; |
255cfeac | 1376 | curr_rec < num_recs && SSL3_RECORD_is_read(&rr[curr_rec]); |
a230b26e | 1377 | curr_rec++) ; |
94777c9c MC |
1378 | if (curr_rec == num_recs) { |
1379 | RECORD_LAYER_set_numrpipes(&s->rlayer, 0); | |
1380 | num_recs = 0; | |
1381 | curr_rec = 0; | |
1382 | } | |
1383 | } while (num_recs == 0); | |
1384 | rr = &rr[curr_rec]; | |
0f113f3e | 1385 | |
3d35e3a2 MC |
1386 | if (s->rlayer.handshake_fragment_len > 0 |
1387 | && SSL3_RECORD_get_type(rr) != SSL3_RT_HANDSHAKE | |
1388 | && SSL_IS_TLS13(s)) { | |
1389 | SSLfatal(s, SSL_AD_UNEXPECTED_MESSAGE, SSL_F_SSL3_READ_BYTES, | |
1390 | SSL_R_MIXED_HANDSHAKE_AND_NON_HANDSHAKE_DATA); | |
1391 | return -1; | |
1392 | } | |
1393 | ||
af58be76 MC |
1394 | /* |
1395 | * Reset the count of consecutive warning alerts if we've got a non-empty | |
1396 | * record that isn't an alert. | |
1397 | */ | |
1398 | if (SSL3_RECORD_get_type(rr) != SSL3_RT_ALERT | |
1399 | && SSL3_RECORD_get_length(rr) != 0) | |
1400 | s->rlayer.alert_count = 0; | |
1401 | ||
0f113f3e MC |
1402 | /* we now have a packet which can be read and processed */ |
1403 | ||
555cbb32 TS |
1404 | if (s->s3.change_cipher_spec /* set when we receive ChangeCipherSpec, |
1405 | * reset by ssl3_get_finished */ | |
747e1639 | 1406 | && (SSL3_RECORD_get_type(rr) != SSL3_RT_HANDSHAKE)) { |
99dd3740 MC |
1407 | SSLfatal(s, SSL_AD_UNEXPECTED_MESSAGE, SSL_F_SSL3_READ_BYTES, |
1408 | SSL_R_DATA_BETWEEN_CCS_AND_FINISHED); | |
1409 | return -1; | |
0f113f3e MC |
1410 | } |
1411 | ||
1412 | /* | |
1413 | * If the other end has shut down, throw anything we read away (even in | |
1414 | * 'peek' mode) | |
1415 | */ | |
1416 | if (s->shutdown & SSL_RECEIVED_SHUTDOWN) { | |
747e1639 | 1417 | SSL3_RECORD_set_length(rr, 0); |
0f113f3e | 1418 | s->rwstate = SSL_NOTHING; |
eda75751 | 1419 | return 0; |
0f113f3e MC |
1420 | } |
1421 | ||
657da85e | 1422 | if (type == SSL3_RECORD_get_type(rr) |
a230b26e | 1423 | || (SSL3_RECORD_get_type(rr) == SSL3_RT_CHANGE_CIPHER_SPEC |
97997489 | 1424 | && type == SSL3_RT_HANDSHAKE && recvd_type != NULL |
bcf2907c | 1425 | && !is_tls13)) { |
657da85e MC |
1426 | /* |
1427 | * SSL3_RT_APPLICATION_DATA or | |
1428 | * SSL3_RT_HANDSHAKE or | |
1429 | * SSL3_RT_CHANGE_CIPHER_SPEC | |
1430 | */ | |
0f113f3e MC |
1431 | /* |
1432 | * make sure that we are not getting application data when we are | |
1433 | * doing a handshake for the first time | |
1434 | */ | |
1435 | if (SSL_in_init(s) && (type == SSL3_RT_APPLICATION_DATA) && | |
1436 | (s->enc_read_ctx == NULL)) { | |
99dd3740 MC |
1437 | SSLfatal(s, SSL_AD_UNEXPECTED_MESSAGE, SSL_F_SSL3_READ_BYTES, |
1438 | SSL_R_APP_DATA_IN_HANDSHAKE); | |
1439 | return -1; | |
0f113f3e MC |
1440 | } |
1441 | ||
657da85e | 1442 | if (type == SSL3_RT_HANDSHAKE |
a230b26e EK |
1443 | && SSL3_RECORD_get_type(rr) == SSL3_RT_CHANGE_CIPHER_SPEC |
1444 | && s->rlayer.handshake_fragment_len > 0) { | |
99dd3740 MC |
1445 | SSLfatal(s, SSL_AD_UNEXPECTED_MESSAGE, SSL_F_SSL3_READ_BYTES, |
1446 | SSL_R_CCS_RECEIVED_EARLY); | |
1447 | return -1; | |
657da85e MC |
1448 | } |
1449 | ||
1450 | if (recvd_type != NULL) | |
1451 | *recvd_type = SSL3_RECORD_get_type(rr); | |
1452 | ||
1c47d35a MC |
1453 | if (len == 0) { |
1454 | /* | |
1455 | * Mark a zero length record as read. This ensures multiple calls to | |
1456 | * SSL_read() with a zero length buffer will eventually cause | |
1457 | * SSL_pending() to report data as being available. | |
1458 | */ | |
1459 | if (SSL3_RECORD_get_length(rr) == 0) | |
1460 | SSL3_RECORD_set_read(rr); | |
eda75751 | 1461 | return 0; |
1c47d35a | 1462 | } |
0f113f3e | 1463 | |
54105ddd | 1464 | totalbytes = 0; |
94777c9c | 1465 | do { |
54105ddd | 1466 | if (len - totalbytes > SSL3_RECORD_get_length(rr)) |
94777c9c MC |
1467 | n = SSL3_RECORD_get_length(rr); |
1468 | else | |
54105ddd | 1469 | n = len - totalbytes; |
94777c9c MC |
1470 | |
1471 | memcpy(buf, &(rr->data[rr->off]), n); | |
1472 | buf += n; | |
b8d24395 MC |
1473 | if (peek) { |
1474 | /* Mark any zero length record as consumed CVE-2016-6305 */ | |
1475 | if (SSL3_RECORD_get_length(rr) == 0) | |
1476 | SSL3_RECORD_set_read(rr); | |
1477 | } else { | |
753be41d | 1478 | SSL3_RECORD_sub_length(rr, n); |
94777c9c MC |
1479 | SSL3_RECORD_add_off(rr, n); |
1480 | if (SSL3_RECORD_get_length(rr) == 0) { | |
1481 | s->rlayer.rstate = SSL_ST_READ_HEADER; | |
1482 | SSL3_RECORD_set_off(rr, 0); | |
255cfeac | 1483 | SSL3_RECORD_set_read(rr); |
94777c9c | 1484 | } |
0f113f3e | 1485 | } |
94777c9c MC |
1486 | if (SSL3_RECORD_get_length(rr) == 0 |
1487 | || (peek && n == SSL3_RECORD_get_length(rr))) { | |
1488 | curr_rec++; | |
1489 | rr++; | |
1490 | } | |
54105ddd | 1491 | totalbytes += n; |
94777c9c | 1492 | } while (type == SSL3_RT_APPLICATION_DATA && curr_rec < num_recs |
54105ddd MC |
1493 | && totalbytes < len); |
1494 | if (totalbytes == 0) { | |
255cfeac MC |
1495 | /* We must have read empty records. Get more data */ |
1496 | goto start; | |
1497 | } | |
94777c9c | 1498 | if (!peek && curr_rec == num_recs |
a230b26e EK |
1499 | && (s->mode & SSL_MODE_RELEASE_BUFFERS) |
1500 | && SSL3_BUFFER_get_left(rbuf) == 0) | |
94777c9c | 1501 | ssl3_release_read_buffer(s); |
54105ddd | 1502 | *readbytes = totalbytes; |
eda75751 | 1503 | return 1; |
0f113f3e MC |
1504 | } |
1505 | ||
1506 | /* | |
1507 | * If we get here, then type != rr->type; if we have a handshake message, | |
657da85e MC |
1508 | * then it was unexpected (Hello Request or Client Hello) or invalid (we |
1509 | * were actually expecting a CCS). | |
0f113f3e MC |
1510 | */ |
1511 | ||
32ec4153 MC |
1512 | /* |
1513 | * Lets just double check that we've not got an SSLv2 record | |
1514 | */ | |
1515 | if (rr->rec_version == SSL2_VERSION) { | |
1516 | /* | |
1517 | * Should never happen. ssl3_get_record() should only give us an SSLv2 | |
1518 | * record back if this is the first packet and we are looking for an | |
1519 | * initial ClientHello. Therefore |type| should always be equal to | |
1520 | * |rr->type|. If not then something has gone horribly wrong | |
1521 | */ | |
99dd3740 MC |
1522 | SSLfatal(s, SSL_AD_INTERNAL_ERROR, SSL_F_SSL3_READ_BYTES, |
1523 | ERR_R_INTERNAL_ERROR); | |
1524 | return -1; | |
32ec4153 MC |
1525 | } |
1526 | ||
e8aa8b6c | 1527 | if (s->method->version == TLS_ANY_VERSION |
a230b26e | 1528 | && (s->server || rr->type != SSL3_RT_ALERT)) { |
13c9bb3e MC |
1529 | /* |
1530 | * If we've got this far and still haven't decided on what version | |
558ea847 RL |
1531 | * we're using then this must be a client side alert we're dealing |
1532 | * with. We shouldn't be receiving anything other than a ClientHello | |
1533 | * if we are a server. | |
13c9bb3e MC |
1534 | */ |
1535 | s->version = rr->rec_version; | |
99dd3740 MC |
1536 | SSLfatal(s, SSL_AD_UNEXPECTED_MESSAGE, SSL_F_SSL3_READ_BYTES, |
1537 | SSL_R_UNEXPECTED_MESSAGE); | |
1538 | return -1; | |
13c9bb3e MC |
1539 | } |
1540 | ||
50e735f9 | 1541 | /*- |
4aa7389e | 1542 | * s->rlayer.handshake_fragment_len == 4 iff rr->type == SSL3_RT_HANDSHAKE; |
50e735f9 MC |
1543 | * (Possibly rr is 'empty' now, i.e. rr->length may be 0.) |
1544 | */ | |
0f113f3e | 1545 | |
bd990e25 MC |
1546 | if (SSL3_RECORD_get_type(rr) == SSL3_RT_ALERT) { |
1547 | unsigned int alert_level, alert_descr; | |
1548 | unsigned char *alert_bytes = SSL3_RECORD_get_data(rr) | |
1549 | + SSL3_RECORD_get_off(rr); | |
1550 | PACKET alert; | |
1551 | ||
1552 | if (!PACKET_buf_init(&alert, alert_bytes, SSL3_RECORD_get_length(rr)) | |
1553 | || !PACKET_get_1(&alert, &alert_level) | |
1554 | || !PACKET_get_1(&alert, &alert_descr) | |
1555 | || PACKET_remaining(&alert) != 0) { | |
99dd3740 MC |
1556 | SSLfatal(s, SSL_AD_UNEXPECTED_MESSAGE, SSL_F_SSL3_READ_BYTES, |
1557 | SSL_R_INVALID_ALERT); | |
1558 | return -1; | |
bd990e25 | 1559 | } |
0f113f3e MC |
1560 | |
1561 | if (s->msg_callback) | |
bd990e25 | 1562 | s->msg_callback(0, s->version, SSL3_RT_ALERT, alert_bytes, 2, s, |
4aa7389e | 1563 | s->msg_callback_arg); |
0f113f3e MC |
1564 | |
1565 | if (s->info_callback != NULL) | |
1566 | cb = s->info_callback; | |
1567 | else if (s->ctx->info_callback != NULL) | |
1568 | cb = s->ctx->info_callback; | |
1569 | ||
1570 | if (cb != NULL) { | |
1571 | j = (alert_level << 8) | alert_descr; | |
1572 | cb(s, SSL_CB_READ_ALERT, j); | |
1573 | } | |
1574 | ||
bcf2907c MC |
1575 | if (alert_level == SSL3_AL_WARNING |
1576 | || (is_tls13 && alert_descr == SSL_AD_USER_CANCELLED)) { | |
555cbb32 | 1577 | s->s3.warn_alert = alert_descr; |
63916e9a | 1578 | SSL3_RECORD_set_read(rr); |
af58be76 MC |
1579 | |
1580 | s->rlayer.alert_count++; | |
1581 | if (s->rlayer.alert_count == MAX_WARN_ALERT_COUNT) { | |
99dd3740 MC |
1582 | SSLfatal(s, SSL_AD_UNEXPECTED_MESSAGE, SSL_F_SSL3_READ_BYTES, |
1583 | SSL_R_TOO_MANY_WARN_ALERTS); | |
1584 | return -1; | |
af58be76 | 1585 | } |
4aa5a566 MC |
1586 | } |
1587 | ||
1588 | /* | |
bcf2907c MC |
1589 | * Apart from close_notify the only other warning alert in TLSv1.3 |
1590 | * is user_cancelled - which we just ignore. | |
4aa5a566 | 1591 | */ |
bcf2907c MC |
1592 | if (is_tls13 && alert_descr == SSL_AD_USER_CANCELLED) { |
1593 | goto start; | |
1594 | } else if (alert_descr == SSL_AD_CLOSE_NOTIFY | |
1595 | && (is_tls13 || alert_level == SSL3_AL_WARNING)) { | |
1596 | s->shutdown |= SSL_RECEIVED_SHUTDOWN; | |
1597 | return 0; | |
1598 | } else if (alert_level == SSL3_AL_FATAL || is_tls13) { | |
0f113f3e MC |
1599 | char tmp[16]; |
1600 | ||
1601 | s->rwstate = SSL_NOTHING; | |
555cbb32 | 1602 | s->s3.fatal_alert = alert_descr; |
99dd3740 MC |
1603 | SSLfatal(s, SSL_AD_NO_ALERT, SSL_F_SSL3_READ_BYTES, |
1604 | SSL_AD_REASON_OFFSET + alert_descr); | |
1605 | BIO_snprintf(tmp, sizeof tmp, "%d", alert_descr); | |
0f113f3e MC |
1606 | ERR_add_error_data(2, "SSL alert number ", tmp); |
1607 | s->shutdown |= SSL_RECEIVED_SHUTDOWN; | |
63916e9a | 1608 | SSL3_RECORD_set_read(rr); |
e2bb9b9b | 1609 | SSL_CTX_remove_session(s->session_ctx, s->session); |
eda75751 | 1610 | return 0; |
bcf2907c MC |
1611 | } else if (alert_descr == SSL_AD_NO_RENEGOTIATION) { |
1612 | /* | |
1613 | * This is a warning but we receive it if we requested | |
1614 | * renegotiation and the peer denied it. Terminate with a fatal | |
1615 | * alert because if application tried to renegotiate it | |
1616 | * presumably had a good reason and expects it to succeed. In | |
1617 | * future we might have a renegotiation where we don't care if | |
1618 | * the peer refused it where we carry on. | |
1619 | */ | |
1620 | SSLfatal(s, SSL_AD_HANDSHAKE_FAILURE, SSL_F_SSL3_READ_BYTES, | |
1621 | SSL_R_NO_RENEGOTIATION); | |
99dd3740 | 1622 | return -1; |
fee33643 MC |
1623 | } else if (alert_level == SSL3_AL_WARNING) { |
1624 | /* We ignore any other warning alert in TLSv1.2 and below */ | |
1625 | goto start; | |
0f113f3e | 1626 | } |
bcf2907c MC |
1627 | |
1628 | SSLfatal(s, SSL_AD_ILLEGAL_PARAMETER, SSL_F_SSL3_READ_BYTES, | |
1629 | SSL_R_UNKNOWN_ALERT_TYPE); | |
1630 | return -1; | |
0f113f3e MC |
1631 | } |
1632 | ||
ba709049 | 1633 | if ((s->shutdown & SSL_SENT_SHUTDOWN) != 0) { |
ba709049 MC |
1634 | if (SSL3_RECORD_get_type(rr) == SSL3_RT_HANDSHAKE) { |
1635 | BIO *rbio; | |
1636 | ||
1bf4cb0f MC |
1637 | /* |
1638 | * We ignore any handshake messages sent to us unless they are | |
1639 | * TLSv1.3 in which case we want to process them. For all other | |
1640 | * handshake messages we can't do anything reasonable with them | |
1641 | * because we are unable to write any response due to having already | |
1642 | * sent close_notify. | |
1643 | */ | |
1644 | if (!SSL_IS_TLS13(s)) { | |
1645 | SSL3_RECORD_set_length(rr, 0); | |
1646 | SSL3_RECORD_set_read(rr); | |
1647 | ||
1648 | if ((s->mode & SSL_MODE_AUTO_RETRY) != 0) | |
1649 | goto start; | |
ba709049 | 1650 | |
1bf4cb0f MC |
1651 | s->rwstate = SSL_READING; |
1652 | rbio = SSL_get_rbio(s); | |
1653 | BIO_clear_retry_flags(rbio); | |
1654 | BIO_set_retry_read(rbio); | |
1655 | return -1; | |
1656 | } | |
358ffa05 MC |
1657 | } else { |
1658 | /* | |
1659 | * The peer is continuing to send application data, but we have | |
1660 | * already sent close_notify. If this was expected we should have | |
1661 | * been called via SSL_read() and this would have been handled | |
1662 | * above. | |
1663 | * No alert sent because we already sent close_notify | |
1664 | */ | |
1bf4cb0f MC |
1665 | SSL3_RECORD_set_length(rr, 0); |
1666 | SSL3_RECORD_set_read(rr); | |
358ffa05 MC |
1667 | SSLfatal(s, SSL_AD_NO_ALERT, SSL_F_SSL3_READ_BYTES, |
1668 | SSL_R_APPLICATION_DATA_AFTER_CLOSE_NOTIFY); | |
1bf4cb0f | 1669 | return -1; |
ba709049 | 1670 | } |
0f113f3e MC |
1671 | } |
1672 | ||
93f528f3 MC |
1673 | /* |
1674 | * For handshake data we have 'fragment' storage, so fill that so that we | |
1675 | * can process the header at a fixed place. This is done after the | |
1676 | * "SHUTDOWN" code above to avoid filling the fragment storage with data | |
1677 | * that we're just going to discard. | |
1678 | */ | |
1679 | if (SSL3_RECORD_get_type(rr) == SSL3_RT_HANDSHAKE) { | |
1680 | size_t dest_maxlen = sizeof(s->rlayer.handshake_fragment); | |
1681 | unsigned char *dest = s->rlayer.handshake_fragment; | |
1682 | size_t *dest_len = &s->rlayer.handshake_fragment_len; | |
1683 | ||
1684 | n = dest_maxlen - *dest_len; /* available space in 'dest' */ | |
1685 | if (SSL3_RECORD_get_length(rr) < n) | |
1686 | n = SSL3_RECORD_get_length(rr); /* available bytes */ | |
1687 | ||
1688 | /* now move 'n' bytes: */ | |
1689 | memcpy(dest + *dest_len, | |
1690 | SSL3_RECORD_get_data(rr) + SSL3_RECORD_get_off(rr), n); | |
1691 | SSL3_RECORD_add_off(rr, n); | |
1692 | SSL3_RECORD_sub_length(rr, n); | |
1693 | *dest_len += n; | |
1694 | if (SSL3_RECORD_get_length(rr) == 0) | |
1695 | SSL3_RECORD_set_read(rr); | |
1696 | ||
1697 | if (*dest_len < dest_maxlen) | |
1698 | goto start; /* fragment was too small */ | |
1699 | } | |
1700 | ||
747e1639 | 1701 | if (SSL3_RECORD_get_type(rr) == SSL3_RT_CHANGE_CIPHER_SPEC) { |
99dd3740 MC |
1702 | SSLfatal(s, SSL_AD_UNEXPECTED_MESSAGE, SSL_F_SSL3_READ_BYTES, |
1703 | SSL_R_CCS_RECEIVED_EARLY); | |
1704 | return -1; | |
0f113f3e MC |
1705 | } |
1706 | ||
1707 | /* | |
c7f47786 | 1708 | * Unexpected handshake message (ClientHello, NewSessionTicket (TLS1.3) or |
0386aad1 | 1709 | * protocol violation) |
0f113f3e | 1710 | */ |
024f543c | 1711 | if ((s->rlayer.handshake_fragment_len >= 4) |
c7f47786 | 1712 | && !ossl_statem_get_in_handshake(s)) { |
39ef7821 MC |
1713 | int ined = (s->early_data_state == SSL_EARLY_DATA_READING); |
1714 | ||
c7f47786 MC |
1715 | /* We found handshake data, so we're going back into init */ |
1716 | ossl_statem_set_in_init(s, 1); | |
1717 | ||
0f113f3e | 1718 | i = s->handshake_func(s); |
99dd3740 | 1719 | /* SSLfatal() already called if appropriate */ |
0f113f3e | 1720 | if (i < 0) |
eda75751 | 1721 | return i; |
0f113f3e | 1722 | if (i == 0) { |
eda75751 | 1723 | return -1; |
0f113f3e MC |
1724 | } |
1725 | ||
39ef7821 MC |
1726 | /* |
1727 | * If we were actually trying to read early data and we found a | |
1728 | * handshake message, then we don't want to continue to try and read | |
1729 | * the application data any more. It won't be "early" now. | |
1730 | */ | |
1731 | if (ined) | |
1732 | return -1; | |
1733 | ||
0f113f3e | 1734 | if (!(s->mode & SSL_MODE_AUTO_RETRY)) { |
94777c9c | 1735 | if (SSL3_BUFFER_get_left(rbuf) == 0) { |
28d59af8 | 1736 | /* no read-ahead left? */ |
0f113f3e MC |
1737 | BIO *bio; |
1738 | /* | |
1739 | * In the case where we try to read application data, but we | |
1740 | * trigger an SSL handshake, we return -1 with the retry | |
1741 | * option set. Otherwise renegotiation may cause nasty | |
1742 | * problems in the blocking world | |
1743 | */ | |
1744 | s->rwstate = SSL_READING; | |
1745 | bio = SSL_get_rbio(s); | |
1746 | BIO_clear_retry_flags(bio); | |
1747 | BIO_set_retry_read(bio); | |
eda75751 | 1748 | return -1; |
0f113f3e MC |
1749 | } |
1750 | } | |
1751 | goto start; | |
1752 | } | |
1753 | ||
747e1639 | 1754 | switch (SSL3_RECORD_get_type(rr)) { |
0f113f3e | 1755 | default: |
0f113f3e | 1756 | /* |
436a2a01 MC |
1757 | * TLS 1.0 and 1.1 say you SHOULD ignore unrecognised record types, but |
1758 | * TLS 1.2 says you MUST send an unexpected message alert. We use the | |
1759 | * TLS 1.2 behaviour for all protocol versions to prevent issues where | |
1760 | * no progress is being made and the peer continually sends unrecognised | |
1761 | * record types, using up resources processing them. | |
0f113f3e | 1762 | */ |
99dd3740 MC |
1763 | SSLfatal(s, SSL_AD_UNEXPECTED_MESSAGE, SSL_F_SSL3_READ_BYTES, |
1764 | SSL_R_UNEXPECTED_RECORD); | |
1765 | return -1; | |
0f113f3e MC |
1766 | case SSL3_RT_CHANGE_CIPHER_SPEC: |
1767 | case SSL3_RT_ALERT: | |
1768 | case SSL3_RT_HANDSHAKE: | |
1769 | /* | |
1770 | * we already handled all of these, with the possible exception of | |
024f543c MC |
1771 | * SSL3_RT_HANDSHAKE when ossl_statem_get_in_handshake(s) is true, but |
1772 | * that should not happen when type != rr->type | |
0f113f3e | 1773 | */ |
99dd3740 MC |
1774 | SSLfatal(s, SSL_AD_UNEXPECTED_MESSAGE, SSL_F_SSL3_READ_BYTES, |
1775 | ERR_R_INTERNAL_ERROR); | |
1776 | return -1; | |
0f113f3e MC |
1777 | case SSL3_RT_APPLICATION_DATA: |
1778 | /* | |
1779 | * At this point, we were expecting handshake data, but have | |
1780 | * application data. If the library was running inside ssl3_read() | |
1781 | * (i.e. in_read_app_data is set) and it makes sense to read | |
1782 | * application data at this point (session renegotiation not yet | |
1783 | * started), we will indulge it. | |
1784 | */ | |
fe3a3291 | 1785 | if (ossl_statem_app_data_allowed(s)) { |
555cbb32 | 1786 | s->s3.in_read_app_data = 2; |
eda75751 | 1787 | return -1; |
a832b5ef MC |
1788 | } else if (ossl_statem_skip_early_data(s)) { |
1789 | /* | |
1790 | * This can happen after a client sends a CH followed by early_data, | |
1791 | * but the server responds with a HelloRetryRequest. The server | |
1792 | * reads the next record from the client expecting to find a | |
1793 | * plaintext ClientHello but gets a record which appears to be | |
1794 | * application data. The trial decrypt "works" because null | |
1795 | * decryption was applied. We just skip it and move on to the next | |
1796 | * record. | |
1797 | */ | |
1798 | if (!early_data_count_ok(s, rr->length, | |
196f2cbb MC |
1799 | EARLY_DATA_CIPHERTEXT_OVERHEAD, 0)) { |
1800 | /* SSLfatal() already called */ | |
99dd3740 | 1801 | return -1; |
196f2cbb | 1802 | } |
a832b5ef MC |
1803 | SSL3_RECORD_set_read(rr); |
1804 | goto start; | |
0f113f3e | 1805 | } else { |
99dd3740 MC |
1806 | SSLfatal(s, SSL_AD_UNEXPECTED_MESSAGE, SSL_F_SSL3_READ_BYTES, |
1807 | SSL_R_UNEXPECTED_RECORD); | |
1808 | return -1; | |
0f113f3e MC |
1809 | } |
1810 | } | |
0f113f3e | 1811 | } |
d02b48c6 | 1812 | |
14daae5a MC |
1813 | void ssl3_record_sequence_update(unsigned char *seq) |
1814 | { | |
1815 | int i; | |
1816 | ||
1817 | for (i = 7; i >= 0; i--) { | |
1818 | ++seq[i]; | |
1819 | if (seq[i] != 0) | |
1820 | break; | |
1821 | } | |
1822 | } | |
1823 | ||
d45ba43d MC |
1824 | /* |
1825 | * Returns true if the current rrec was sent in SSLv2 backwards compatible | |
1826 | * format and false otherwise. | |
1827 | */ | |
32ec4153 MC |
1828 | int RECORD_LAYER_is_sslv2_record(RECORD_LAYER *rl) |
1829 | { | |
94777c9c | 1830 | return SSL3_RECORD_is_sslv2_record(&rl->rrec[0]); |
32ec4153 | 1831 | } |
0f113f3e | 1832 | |
d45ba43d MC |
1833 | /* |
1834 | * Returns the length in bytes of the current rrec | |
1835 | */ | |
eda75751 | 1836 | size_t RECORD_LAYER_get_rrec_length(RECORD_LAYER *rl) |
32ec4153 | 1837 | { |
94777c9c | 1838 | return SSL3_RECORD_get_length(&rl->rrec[0]); |
32ec4153 | 1839 | } |