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Commit | Line | Data |
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846e33c7 RS |
1 | /* |
2 | * Copyright 1995-2016 The OpenSSL Project Authors. All Rights Reserved. | |
c51ae173 | 3 | * |
846e33c7 RS |
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 | |
c51ae173 | 8 | */ |
d02b48c6 RE |
9 | |
10 | #include <stdio.h> | |
c7f47786 | 11 | #include <assert.h> |
339da43d | 12 | #include <limits.h> |
d02b48c6 RE |
13 | #include <errno.h> |
14 | #define USE_SOCKETS | |
999005e4 | 15 | #include "../ssl_locl.h" |
ec577822 BM |
16 | #include <openssl/evp.h> |
17 | #include <openssl/buffer.h> | |
637f374a | 18 | #include <openssl/rand.h> |
c99c4c11 | 19 | #include "record_locl.h" |
d02b48c6 | 20 | |
0f113f3e MC |
21 | #if defined(OPENSSL_SMALL_FOOTPRINT) || \ |
22 | !( defined(AES_ASM) && ( \ | |
23 | defined(__x86_64) || defined(__x86_64__) || \ | |
fbaf30d0 | 24 | defined(_M_AMD64) || defined(_M_X64) ) \ |
0f113f3e | 25 | ) |
a9c6edcd AP |
26 | # undef EVP_CIPH_FLAG_TLS1_1_MULTIBLOCK |
27 | # define EVP_CIPH_FLAG_TLS1_1_MULTIBLOCK 0 | |
28 | #endif | |
29 | ||
c036e210 MC |
30 | void RECORD_LAYER_init(RECORD_LAYER *rl, SSL *s) |
31 | { | |
32 | rl->s = s; | |
78fcddbb | 33 | RECORD_LAYER_set_first_record(&s->rlayer); |
94777c9c | 34 | SSL3_RECORD_clear(rl->rrec, SSL_MAX_PIPELINES); |
c036e210 MC |
35 | } |
36 | ||
af9752e5 MC |
37 | void RECORD_LAYER_clear(RECORD_LAYER *rl) |
38 | { | |
6b41b3f5 | 39 | rl->rstate = SSL_ST_READ_HEADER; |
af9752e5 | 40 | |
a230b26e EK |
41 | /* |
42 | * Do I need to clear read_ahead? As far as I can tell read_ahead did not | |
af9752e5 MC |
43 | * previously get reset by SSL_clear...so I'll keep it that way..but is |
44 | * that right? | |
45 | */ | |
6b41b3f5 MC |
46 | |
47 | rl->packet = NULL; | |
48 | rl->packet_length = 0; | |
49 | rl->wnum = 0; | |
50 | memset(rl->alert_fragment, 0, sizeof(rl->alert_fragment)); | |
51 | rl->alert_fragment_len = 0; | |
52 | memset(rl->handshake_fragment, 0, sizeof(rl->handshake_fragment)); | |
53 | rl->handshake_fragment_len = 0; | |
54 | rl->wpend_tot = 0; | |
55 | rl->wpend_type = 0; | |
56 | rl->wpend_ret = 0; | |
57 | rl->wpend_buf = NULL; | |
58 | ||
59 | SSL3_BUFFER_clear(&rl->rbuf); | |
4bf08600 | 60 | ssl3_release_write_buffer(rl->s); |
0aac3a6b | 61 | rl->numrpipes = 0; |
94777c9c | 62 | SSL3_RECORD_clear(rl->rrec, SSL_MAX_PIPELINES); |
6b41b3f5 | 63 | |
95cdad63 MC |
64 | RECORD_LAYER_reset_read_sequence(rl); |
65 | RECORD_LAYER_reset_write_sequence(rl); | |
0485d540 | 66 | |
6b41b3f5 | 67 | if (rl->d) |
5fb6f80c | 68 | DTLS_RECORD_LAYER_clear(rl); |
af9752e5 MC |
69 | } |
70 | ||
f161995e MC |
71 | void RECORD_LAYER_release(RECORD_LAYER *rl) |
72 | { | |
73 | if (SSL3_BUFFER_is_initialised(&rl->rbuf)) | |
74 | ssl3_release_read_buffer(rl->s); | |
d102d9df | 75 | if (rl->numwpipes > 0) |
f161995e | 76 | ssl3_release_write_buffer(rl->s); |
94777c9c | 77 | SSL3_RECORD_release(rl->rrec, SSL_MAX_PIPELINES); |
f161995e MC |
78 | } |
79 | ||
b8c49611 | 80 | /* Checks if we have unprocessed read ahead data pending */ |
49580f25 | 81 | int RECORD_LAYER_read_pending(const RECORD_LAYER *rl) |
f161995e MC |
82 | { |
83 | return SSL3_BUFFER_get_left(&rl->rbuf) != 0; | |
84 | } | |
85 | ||
b8c49611 MC |
86 | /* Checks if we have decrypted unread record data pending */ |
87 | int RECORD_LAYER_processed_read_pending(const RECORD_LAYER *rl) | |
88 | { | |
89 | size_t curr_rec = 0, num_recs = RECORD_LAYER_get_numrpipes(rl); | |
90 | const SSL3_RECORD *rr = rl->rrec; | |
91 | ||
92 | while (curr_rec < num_recs && SSL3_RECORD_is_read(&rr[curr_rec])) | |
93 | curr_rec++; | |
94 | ||
95 | return curr_rec < num_recs; | |
96 | } | |
97 | ||
49580f25 | 98 | int RECORD_LAYER_write_pending(const RECORD_LAYER *rl) |
f161995e | 99 | { |
d102d9df | 100 | return (rl->numwpipes > 0) |
a230b26e | 101 | && SSL3_BUFFER_get_left(&rl->wbuf[rl->numwpipes - 1]) != 0; |
f161995e MC |
102 | } |
103 | ||
de07f311 MC |
104 | void RECORD_LAYER_reset_read_sequence(RECORD_LAYER *rl) |
105 | { | |
95cdad63 | 106 | memset(rl->read_sequence, 0, sizeof(rl->read_sequence)); |
de07f311 MC |
107 | } |
108 | ||
109 | void RECORD_LAYER_reset_write_sequence(RECORD_LAYER *rl) | |
110 | { | |
95cdad63 | 111 | memset(rl->write_sequence, 0, sizeof(rl->write_sequence)); |
de07f311 MC |
112 | } |
113 | ||
8b0e934a | 114 | size_t ssl3_pending(const SSL *s) |
d5a25ae0 | 115 | { |
8b0e934a | 116 | size_t i, num = 0; |
94777c9c | 117 | |
295c3f41 | 118 | if (s->rlayer.rstate == SSL_ST_READ_BODY) |
d5a25ae0 MC |
119 | return 0; |
120 | ||
94777c9c MC |
121 | for (i = 0; i < RECORD_LAYER_get_numrpipes(&s->rlayer); i++) { |
122 | if (SSL3_RECORD_get_type(&s->rlayer.rrec[i]) | |
a230b26e | 123 | != SSL3_RT_APPLICATION_DATA) |
94777c9c MC |
124 | return 0; |
125 | num += SSL3_RECORD_get_length(&s->rlayer.rrec[i]); | |
126 | } | |
127 | ||
128 | return num; | |
d5a25ae0 MC |
129 | } |
130 | ||
dad78fb1 MC |
131 | void SSL_CTX_set_default_read_buffer_len(SSL_CTX *ctx, size_t len) |
132 | { | |
133 | ctx->default_read_buf_len = len; | |
134 | } | |
135 | ||
136 | void SSL_set_default_read_buffer_len(SSL *s, size_t len) | |
137 | { | |
138 | SSL3_BUFFER_set_default_len(RECORD_LAYER_get_rbuf(&s->rlayer), len); | |
139 | } | |
140 | ||
295c3f41 MC |
141 | const char *SSL_rstate_string_long(const SSL *s) |
142 | { | |
295c3f41 MC |
143 | switch (s->rlayer.rstate) { |
144 | case SSL_ST_READ_HEADER: | |
475965f2 | 145 | return "read header"; |
295c3f41 | 146 | case SSL_ST_READ_BODY: |
475965f2 | 147 | return "read body"; |
295c3f41 | 148 | case SSL_ST_READ_DONE: |
475965f2 | 149 | return "read done"; |
295c3f41 | 150 | default: |
475965f2 | 151 | return "unknown"; |
295c3f41 | 152 | } |
295c3f41 MC |
153 | } |
154 | ||
155 | const char *SSL_rstate_string(const SSL *s) | |
156 | { | |
295c3f41 MC |
157 | switch (s->rlayer.rstate) { |
158 | case SSL_ST_READ_HEADER: | |
475965f2 | 159 | return "RH"; |
295c3f41 | 160 | case SSL_ST_READ_BODY: |
475965f2 | 161 | return "RB"; |
295c3f41 | 162 | case SSL_ST_READ_DONE: |
475965f2 | 163 | return "RD"; |
295c3f41 | 164 | default: |
475965f2 | 165 | return "unknown"; |
295c3f41 | 166 | } |
295c3f41 MC |
167 | } |
168 | ||
4880672a | 169 | /* |
beacb0f0 | 170 | * Return values are as per SSL_read() |
4880672a | 171 | */ |
8e6d03ca | 172 | int ssl3_read_n(SSL *s, size_t n, size_t max, int extend, int clearold, |
54105ddd | 173 | size_t *readbytes) |
0f113f3e MC |
174 | { |
175 | /* | |
176 | * If extend == 0, obtain new n-byte packet; if extend == 1, increase | |
177 | * packet by another n bytes. The packet will be in the sub-array of | |
178 | * s->s3->rbuf.buf specified by s->packet and s->packet_length. (If | |
52e1d7b1 | 179 | * s->rlayer.read_ahead is set, 'max' bytes may be stored in rbuf [plus |
0f113f3e | 180 | * s->packet_length bytes if extend == 1].) |
94777c9c MC |
181 | * if clearold == 1, move the packet to the start of the buffer; if |
182 | * clearold == 0 then leave any old packets where they were | |
0f113f3e | 183 | */ |
8e6d03ca | 184 | size_t len, left, align = 0; |
0f113f3e MC |
185 | unsigned char *pkt; |
186 | SSL3_BUFFER *rb; | |
187 | ||
8e6d03ca MC |
188 | if (n == 0) |
189 | return 0; | |
0f113f3e | 190 | |
88c23039 | 191 | rb = &s->rlayer.rbuf; |
0f113f3e MC |
192 | if (rb->buf == NULL) |
193 | if (!ssl3_setup_read_buffer(s)) | |
194 | return -1; | |
195 | ||
196 | left = rb->left; | |
a4d64c7f | 197 | #if defined(SSL3_ALIGN_PAYLOAD) && SSL3_ALIGN_PAYLOAD!=0 |
f4bd5de5 | 198 | align = (size_t)rb->buf + SSL3_RT_HEADER_LENGTH; |
753be41d | 199 | align = SSL3_ALIGN_PAYLOAD - 1 - ((align - 1) % SSL3_ALIGN_PAYLOAD); |
a4d64c7f | 200 | #endif |
d02b48c6 | 201 | |
0f113f3e MC |
202 | if (!extend) { |
203 | /* start with empty packet ... */ | |
204 | if (left == 0) | |
205 | rb->offset = align; | |
206 | else if (align != 0 && left >= SSL3_RT_HEADER_LENGTH) { | |
207 | /* | |
208 | * check if next packet length is large enough to justify payload | |
209 | * alignment... | |
210 | */ | |
211 | pkt = rb->buf + rb->offset; | |
212 | if (pkt[0] == SSL3_RT_APPLICATION_DATA | |
213 | && (pkt[3] << 8 | pkt[4]) >= 128) { | |
214 | /* | |
215 | * Note that even if packet is corrupted and its length field | |
216 | * is insane, we can only be led to wrong decision about | |
217 | * whether memmove will occur or not. Header values has no | |
218 | * effect on memmove arguments and therefore no buffer | |
219 | * overrun can be triggered. | |
220 | */ | |
221 | memmove(rb->buf + align, pkt, left); | |
222 | rb->offset = align; | |
223 | } | |
224 | } | |
7a7048af MC |
225 | s->rlayer.packet = rb->buf + rb->offset; |
226 | s->rlayer.packet_length = 0; | |
0f113f3e MC |
227 | /* ... now we can act as if 'extend' was set */ |
228 | } | |
229 | ||
a7faa6da MC |
230 | len = s->rlayer.packet_length; |
231 | pkt = rb->buf + align; | |
232 | /* | |
233 | * Move any available bytes to front of buffer: 'len' bytes already | |
234 | * pointed to by 'packet', 'left' extra ones at the end | |
235 | */ | |
236 | if (s->rlayer.packet != pkt && clearold == 1) { | |
237 | memmove(pkt, s->rlayer.packet, len + left); | |
238 | s->rlayer.packet = pkt; | |
239 | rb->offset = len + align; | |
240 | } | |
241 | ||
0f113f3e MC |
242 | /* |
243 | * For DTLS/UDP reads should not span multiple packets because the read | |
244 | * operation returns the whole packet at once (as long as it fits into | |
245 | * the buffer). | |
246 | */ | |
247 | if (SSL_IS_DTLS(s)) { | |
248 | if (left == 0 && extend) | |
249 | return 0; | |
250 | if (left > 0 && n > left) | |
251 | n = left; | |
252 | } | |
253 | ||
254 | /* if there is enough in the buffer from a previous read, take some */ | |
255 | if (left >= n) { | |
7a7048af | 256 | s->rlayer.packet_length += n; |
0f113f3e MC |
257 | rb->left = left - n; |
258 | rb->offset += n; | |
54105ddd | 259 | *readbytes = n; |
8e6d03ca | 260 | return 1; |
0f113f3e MC |
261 | } |
262 | ||
263 | /* else we need to read more data */ | |
264 | ||
ff04799d | 265 | if (n > rb->len - rb->offset) { /* does not happen */ |
0f113f3e MC |
266 | SSLerr(SSL_F_SSL3_READ_N, ERR_R_INTERNAL_ERROR); |
267 | return -1; | |
268 | } | |
269 | ||
8dd4ad0f | 270 | /* We always act like read_ahead is set for DTLS */ |
4118dfdc | 271 | if (!s->rlayer.read_ahead && !SSL_IS_DTLS(s)) |
0f113f3e MC |
272 | /* ignore max parameter */ |
273 | max = n; | |
274 | else { | |
275 | if (max < n) | |
276 | max = n; | |
ff04799d | 277 | if (max > rb->len - rb->offset) |
0f113f3e MC |
278 | max = rb->len - rb->offset; |
279 | } | |
280 | ||
281 | while (left < n) { | |
f0ca8f89 | 282 | size_t bioread = 0; |
8e6d03ca MC |
283 | int ret; |
284 | ||
0f113f3e MC |
285 | /* |
286 | * Now we have len+left bytes at the front of s->s3->rbuf.buf and | |
287 | * need to read in more until we have len+n (up to len+max if | |
288 | * possible) | |
289 | */ | |
290 | ||
291 | clear_sys_error(); | |
292 | if (s->rbio != NULL) { | |
293 | s->rwstate = SSL_READING; | |
8e6d03ca MC |
294 | /* TODO(size_t): Convert this function */ |
295 | ret = BIO_read(s->rbio, pkt + len + left, max - left); | |
296 | if (ret >= 0) | |
297 | bioread = ret; | |
0f113f3e MC |
298 | } else { |
299 | SSLerr(SSL_F_SSL3_READ_N, SSL_R_READ_BIO_NOT_SET); | |
8e6d03ca | 300 | ret = -1; |
0f113f3e MC |
301 | } |
302 | ||
8e6d03ca | 303 | if (ret <= 0) { |
0f113f3e MC |
304 | rb->left = left; |
305 | if (s->mode & SSL_MODE_RELEASE_BUFFERS && !SSL_IS_DTLS(s)) | |
306 | if (len + left == 0) | |
307 | ssl3_release_read_buffer(s); | |
beacb0f0 | 308 | return ret; |
0f113f3e | 309 | } |
8e6d03ca | 310 | left += bioread; |
0f113f3e MC |
311 | /* |
312 | * reads should *never* span multiple packets for DTLS because the | |
313 | * underlying transport protocol is message oriented as opposed to | |
314 | * byte oriented as in the TLS case. | |
315 | */ | |
316 | if (SSL_IS_DTLS(s)) { | |
317 | if (n > left) | |
318 | n = left; /* makes the while condition false */ | |
319 | } | |
320 | } | |
321 | ||
322 | /* done reading, now the book-keeping */ | |
323 | rb->offset += n; | |
324 | rb->left = left - n; | |
7a7048af | 325 | s->rlayer.packet_length += n; |
0f113f3e | 326 | s->rwstate = SSL_NOTHING; |
54105ddd | 327 | *readbytes = n; |
8e6d03ca | 328 | return 1; |
0f113f3e MC |
329 | } |
330 | ||
0f113f3e MC |
331 | /* |
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. | |
d02b48c6 | 334 | */ |
7ee8627f MC |
335 | int ssl3_write_bytes(SSL *s, int type, const void *buf_, size_t len, |
336 | size_t *written) | |
0f113f3e MC |
337 | { |
338 | const unsigned char *buf = buf_; | |
7ee8627f MC |
339 | size_t tot; |
340 | size_t n, split_send_fragment, maxpipes; | |
f1f7598c | 341 | #if !defined(OPENSSL_NO_MULTIBLOCK) && EVP_CIPH_FLAG_TLS1_1_MULTIBLOCK |
7ee8627f | 342 | size_t max_send_fragment, nw; |
f1f7598c | 343 | #endif |
d102d9df | 344 | SSL3_BUFFER *wb = &s->rlayer.wbuf[0]; |
0f113f3e | 345 | int i; |
7ee8627f | 346 | size_t tmpwrit; |
0f113f3e MC |
347 | |
348 | s->rwstate = SSL_NOTHING; | |
e2228d31 | 349 | tot = s->rlayer.wnum; |
0f113f3e MC |
350 | /* |
351 | * ensure that if we end up with a smaller value of data to write out | |
352 | * than the the original len from a write which didn't complete for | |
353 | * non-blocking I/O and also somehow ended up avoiding the check for | |
354 | * this in ssl3_write_pending/SSL_R_BAD_WRITE_RETRY as it must never be | |
355 | * possible to end up with (len-tot) as a large number that will then | |
356 | * promptly send beyond the end of the users buffer ... so we trap and | |
357 | * report the error in a way the user will notice | |
358 | */ | |
cbbe9186 RS |
359 | if ((len < s->rlayer.wnum) |
360 | || ((wb->left != 0) && (len < (s->rlayer.wnum + s->rlayer.wpend_tot)))) { | |
0f113f3e | 361 | SSLerr(SSL_F_SSL3_WRITE_BYTES, SSL_R_BAD_LENGTH); |
1c2e5d56 MC |
362 | return -1; |
363 | } | |
364 | ||
7daf7156 MC |
365 | if (s->early_data_state == SSL_EARLY_DATA_WRITING |
366 | && !early_data_count_ok(s, len, 0, NULL)) | |
367 | return -1; | |
368 | ||
1c2e5d56 MC |
369 | s->rlayer.wnum = 0; |
370 | ||
59cebcf9 MC |
371 | /* |
372 | * When writing early data on the server side we could be "in_init" in | |
373 | * between receiving the EoED and the CF - but we don't want to handle those | |
374 | * messages yet. | |
375 | */ | |
376 | if (SSL_in_init(s) && !ossl_statem_get_in_handshake(s) | |
377 | && s->early_data_state != SSL_EARLY_DATA_UNAUTH_WRITING) { | |
1c2e5d56 MC |
378 | i = s->handshake_func(s); |
379 | if (i < 0) | |
7ee8627f | 380 | return i; |
1c2e5d56 MC |
381 | if (i == 0) { |
382 | SSLerr(SSL_F_SSL3_WRITE_BYTES, SSL_R_SSL_HANDSHAKE_FAILURE); | |
383 | return -1; | |
384 | } | |
0f113f3e MC |
385 | } |
386 | ||
387 | /* | |
388 | * first check if there is a SSL3_BUFFER still being written out. This | |
389 | * will happen with non blocking IO | |
390 | */ | |
391 | if (wb->left != 0) { | |
7ee8627f MC |
392 | i = ssl3_write_pending(s, type, &buf[tot], s->rlayer.wpend_tot, |
393 | &tmpwrit); | |
0f113f3e MC |
394 | if (i <= 0) { |
395 | /* XXX should we ssl3_release_write_buffer if i<0? */ | |
e2228d31 | 396 | s->rlayer.wnum = tot; |
0f113f3e MC |
397 | return i; |
398 | } | |
7ee8627f | 399 | tot += tmpwrit; /* this might be last fragment */ |
0f113f3e | 400 | } |
a9c6edcd | 401 | #if !defined(OPENSSL_NO_MULTIBLOCK) && EVP_CIPH_FLAG_TLS1_1_MULTIBLOCK |
0f113f3e MC |
402 | /* |
403 | * Depending on platform multi-block can deliver several *times* | |
404 | * better performance. Downside is that it has to allocate | |
8483a003 | 405 | * jumbo buffer to accommodate up to 8 records, but the |
0f113f3e MC |
406 | * compromise is considered worthy. |
407 | */ | |
408 | if (type == SSL3_RT_APPLICATION_DATA && | |
7ee8627f | 409 | len >= 4 * (max_send_fragment = s->max_send_fragment) && |
0f113f3e | 410 | s->compress == NULL && s->msg_callback == NULL && |
28a31a0a | 411 | !SSL_WRITE_ETM(s) && SSL_USE_EXPLICIT_IV(s) && |
846ec07d | 412 | EVP_CIPHER_flags(EVP_CIPHER_CTX_cipher(s->enc_write_ctx)) & |
0f113f3e MC |
413 | EVP_CIPH_FLAG_TLS1_1_MULTIBLOCK) { |
414 | unsigned char aad[13]; | |
415 | EVP_CTRL_TLS1_1_MULTIBLOCK_PARAM mb_param; | |
8e6d03ca | 416 | size_t packlen; |
e3c9727f | 417 | int packleni; |
0f113f3e MC |
418 | |
419 | /* minimize address aliasing conflicts */ | |
420 | if ((max_send_fragment & 0xfff) == 0) | |
421 | max_send_fragment -= 512; | |
422 | ||
423 | if (tot == 0 || wb->buf == NULL) { /* allocate jumbo buffer */ | |
424 | ssl3_release_write_buffer(s); | |
425 | ||
426 | packlen = EVP_CIPHER_CTX_ctrl(s->enc_write_ctx, | |
427 | EVP_CTRL_TLS1_1_MULTIBLOCK_MAX_BUFSIZE, | |
8b0e934a | 428 | (int)max_send_fragment, NULL); |
0f113f3e | 429 | |
7ee8627f | 430 | if (len >= 8 * max_send_fragment) |
0f113f3e MC |
431 | packlen *= 8; |
432 | else | |
433 | packlen *= 4; | |
434 | ||
58c27c20 | 435 | if (!ssl3_setup_write_buffer(s, 1, packlen)) { |
918bb865 MC |
436 | SSLerr(SSL_F_SSL3_WRITE_BYTES, ERR_R_MALLOC_FAILURE); |
437 | return -1; | |
438 | } | |
0f113f3e | 439 | } else if (tot == len) { /* done? */ |
58c27c20 MC |
440 | /* free jumbo buffer */ |
441 | ssl3_release_write_buffer(s); | |
8b0e934a MC |
442 | *written = tot; |
443 | return 1; | |
0f113f3e MC |
444 | } |
445 | ||
446 | n = (len - tot); | |
447 | for (;;) { | |
448 | if (n < 4 * max_send_fragment) { | |
58c27c20 MC |
449 | /* free jumbo buffer */ |
450 | ssl3_release_write_buffer(s); | |
0f113f3e MC |
451 | break; |
452 | } | |
453 | ||
454 | if (s->s3->alert_dispatch) { | |
455 | i = s->method->ssl_dispatch_alert(s); | |
456 | if (i <= 0) { | |
e2228d31 | 457 | s->rlayer.wnum = tot; |
0f113f3e MC |
458 | return i; |
459 | } | |
460 | } | |
461 | ||
462 | if (n >= 8 * max_send_fragment) | |
463 | nw = max_send_fragment * (mb_param.interleave = 8); | |
464 | else | |
465 | nw = max_send_fragment * (mb_param.interleave = 4); | |
466 | ||
de07f311 | 467 | memcpy(aad, s->rlayer.write_sequence, 8); |
0f113f3e MC |
468 | aad[8] = type; |
469 | aad[9] = (unsigned char)(s->version >> 8); | |
470 | aad[10] = (unsigned char)(s->version); | |
471 | aad[11] = 0; | |
472 | aad[12] = 0; | |
473 | mb_param.out = NULL; | |
474 | mb_param.inp = aad; | |
475 | mb_param.len = nw; | |
476 | ||
e3c9727f | 477 | packleni = EVP_CIPHER_CTX_ctrl(s->enc_write_ctx, |
0f113f3e MC |
478 | EVP_CTRL_TLS1_1_MULTIBLOCK_AAD, |
479 | sizeof(mb_param), &mb_param); | |
e3c9727f MC |
480 | packlen = (size_t)packleni; |
481 | if (packleni <= 0 || packlen > wb->len) { /* never happens */ | |
58c27c20 MC |
482 | /* free jumbo buffer */ |
483 | ssl3_release_write_buffer(s); | |
0f113f3e MC |
484 | break; |
485 | } | |
486 | ||
487 | mb_param.out = wb->buf; | |
488 | mb_param.inp = &buf[tot]; | |
489 | mb_param.len = nw; | |
490 | ||
491 | if (EVP_CIPHER_CTX_ctrl(s->enc_write_ctx, | |
492 | EVP_CTRL_TLS1_1_MULTIBLOCK_ENCRYPT, | |
493 | sizeof(mb_param), &mb_param) <= 0) | |
494 | return -1; | |
495 | ||
de07f311 MC |
496 | s->rlayer.write_sequence[7] += mb_param.interleave; |
497 | if (s->rlayer.write_sequence[7] < mb_param.interleave) { | |
0f113f3e | 498 | int j = 6; |
de07f311 | 499 | while (j >= 0 && (++s->rlayer.write_sequence[j--]) == 0) ; |
0f113f3e MC |
500 | } |
501 | ||
502 | wb->offset = 0; | |
503 | wb->left = packlen; | |
504 | ||
f8caa3c8 MC |
505 | s->rlayer.wpend_tot = nw; |
506 | s->rlayer.wpend_buf = &buf[tot]; | |
507 | s->rlayer.wpend_type = type; | |
508 | s->rlayer.wpend_ret = nw; | |
0f113f3e | 509 | |
7ee8627f | 510 | i = ssl3_write_pending(s, type, &buf[tot], nw, &tmpwrit); |
0f113f3e | 511 | if (i <= 0) { |
1d2a18dc | 512 | if (i < 0 && (!s->wbio || !BIO_should_retry(s->wbio))) { |
58c27c20 MC |
513 | /* free jumbo buffer */ |
514 | ssl3_release_write_buffer(s); | |
0f113f3e | 515 | } |
e2228d31 | 516 | s->rlayer.wnum = tot; |
0f113f3e MC |
517 | return i; |
518 | } | |
7ee8627f | 519 | if (tmpwrit == n) { |
58c27c20 MC |
520 | /* free jumbo buffer */ |
521 | ssl3_release_write_buffer(s); | |
7ee8627f MC |
522 | *written = tot + tmpwrit; |
523 | return 1; | |
0f113f3e | 524 | } |
7ee8627f MC |
525 | n -= tmpwrit; |
526 | tot += tmpwrit; | |
0f113f3e MC |
527 | } |
528 | } else | |
a9c6edcd | 529 | #endif |
0f113f3e MC |
530 | if (tot == len) { /* done? */ |
531 | if (s->mode & SSL_MODE_RELEASE_BUFFERS && !SSL_IS_DTLS(s)) | |
532 | ssl3_release_write_buffer(s); | |
533 | ||
7ee8627f MC |
534 | *written = tot; |
535 | return 1; | |
0f113f3e MC |
536 | } |
537 | ||
538 | n = (len - tot); | |
d102d9df MC |
539 | |
540 | split_send_fragment = s->split_send_fragment; | |
541 | /* | |
542 | * If max_pipelines is 0 then this means "undefined" and we default to | |
8483a003 | 543 | * 1 pipeline. Similarly if the cipher does not support pipelined |
d102d9df MC |
544 | * processing then we also only use 1 pipeline, or if we're not using |
545 | * explicit IVs | |
546 | */ | |
547 | maxpipes = s->max_pipelines; | |
548 | if (maxpipes > SSL_MAX_PIPELINES) { | |
549 | /* | |
550 | * We should have prevented this when we set max_pipelines so we | |
551 | * shouldn't get here | |
a230b26e | 552 | */ |
d102d9df MC |
553 | SSLerr(SSL_F_SSL3_WRITE_BYTES, ERR_R_INTERNAL_ERROR); |
554 | return -1; | |
555 | } | |
556 | if (maxpipes == 0 | |
a230b26e EK |
557 | || s->enc_write_ctx == NULL |
558 | || !(EVP_CIPHER_flags(EVP_CIPHER_CTX_cipher(s->enc_write_ctx)) | |
559 | & EVP_CIPH_FLAG_PIPELINE) | |
560 | || !SSL_USE_EXPLICIT_IV(s)) | |
d102d9df MC |
561 | maxpipes = 1; |
562 | if (s->max_send_fragment == 0 || split_send_fragment > s->max_send_fragment | |
a230b26e | 563 | || split_send_fragment == 0) { |
d102d9df MC |
564 | /* |
565 | * We should have prevented this when we set the split and max send | |
566 | * fragments so we shouldn't get here | |
a230b26e | 567 | */ |
d102d9df MC |
568 | SSLerr(SSL_F_SSL3_WRITE_BYTES, ERR_R_INTERNAL_ERROR); |
569 | return -1; | |
570 | } | |
571 | ||
0f113f3e | 572 | for (;;) { |
7ee8627f MC |
573 | size_t pipelens[SSL_MAX_PIPELINES], tmppipelen, remain; |
574 | size_t numpipes, j; | |
d102d9df MC |
575 | |
576 | if (n == 0) | |
577 | numpipes = 1; | |
0f113f3e | 578 | else |
d102d9df MC |
579 | numpipes = ((n - 1) / split_send_fragment) + 1; |
580 | if (numpipes > maxpipes) | |
581 | numpipes = maxpipes; | |
582 | ||
583 | if (n / numpipes >= s->max_send_fragment) { | |
584 | /* | |
585 | * We have enough data to completely fill all available | |
586 | * pipelines | |
587 | */ | |
588 | for (j = 0; j < numpipes; j++) { | |
589 | pipelens[j] = s->max_send_fragment; | |
590 | } | |
591 | } else { | |
592 | /* We can partially fill all available pipelines */ | |
593 | tmppipelen = n / numpipes; | |
594 | remain = n % numpipes; | |
595 | for (j = 0; j < numpipes; j++) { | |
596 | pipelens[j] = tmppipelen; | |
597 | if (j < remain) | |
598 | pipelens[j]++; | |
599 | } | |
600 | } | |
0f113f3e | 601 | |
7ee8627f MC |
602 | i = do_ssl3_write(s, type, &(buf[tot]), pipelens, numpipes, 0, |
603 | &tmpwrit); | |
0f113f3e MC |
604 | if (i <= 0) { |
605 | /* XXX should we ssl3_release_write_buffer if i<0? */ | |
e2228d31 | 606 | s->rlayer.wnum = tot; |
0f113f3e MC |
607 | return i; |
608 | } | |
609 | ||
ff04799d | 610 | if (tmpwrit == n || |
0f113f3e MC |
611 | (type == SSL3_RT_APPLICATION_DATA && |
612 | (s->mode & SSL_MODE_ENABLE_PARTIAL_WRITE))) { | |
613 | /* | |
614 | * next chunk of data should get another prepended empty fragment | |
615 | * in ciphersuites with known-IV weakness: | |
616 | */ | |
617 | s->s3->empty_fragment_done = 0; | |
618 | ||
619 | if ((i == (int)n) && s->mode & SSL_MODE_RELEASE_BUFFERS && | |
620 | !SSL_IS_DTLS(s)) | |
621 | ssl3_release_write_buffer(s); | |
622 | ||
7ee8627f MC |
623 | *written = tot + tmpwrit; |
624 | return 1; | |
0f113f3e MC |
625 | } |
626 | ||
7ee8627f MC |
627 | n -= tmpwrit; |
628 | tot += tmpwrit; | |
0f113f3e MC |
629 | } |
630 | } | |
d02b48c6 | 631 | |
c103c7e2 | 632 | int do_ssl3_write(SSL *s, int type, const unsigned char *buf, |
7ee8627f MC |
633 | size_t *pipelens, size_t numpipes, |
634 | int create_empty_fragment, size_t *written) | |
0f113f3e | 635 | { |
c7c42022 | 636 | WPACKET pkt[SSL_MAX_PIPELINES]; |
d102d9df | 637 | SSL3_RECORD wr[SSL_MAX_PIPELINES]; |
44e58f3b MC |
638 | WPACKET *thispkt; |
639 | SSL3_RECORD *thiswr; | |
c7c42022 | 640 | unsigned char *recordstart; |
0f113f3e | 641 | int i, mac_size, clear = 0; |
7ee8627f | 642 | size_t prefix_len = 0; |
829754a6 | 643 | int eivlen = 0; |
f4bd5de5 | 644 | size_t align = 0; |
d102d9df | 645 | SSL3_BUFFER *wb; |
0f113f3e | 646 | SSL_SESSION *sess; |
c7c42022 | 647 | size_t totlen = 0, len, wpinited = 0; |
7ee8627f | 648 | size_t j; |
0f113f3e | 649 | |
d102d9df MC |
650 | for (j = 0; j < numpipes; j++) |
651 | totlen += pipelens[j]; | |
0f113f3e MC |
652 | /* |
653 | * first check if there is a SSL3_BUFFER still being written out. This | |
654 | * will happen with non blocking IO | |
655 | */ | |
d102d9df | 656 | if (RECORD_LAYER_write_pending(&s->rlayer)) |
7ee8627f | 657 | return ssl3_write_pending(s, type, buf, totlen, written); |
0f113f3e MC |
658 | |
659 | /* If we have an alert to send, lets send it */ | |
660 | if (s->s3->alert_dispatch) { | |
661 | i = s->method->ssl_dispatch_alert(s); | |
662 | if (i <= 0) | |
663 | return (i); | |
664 | /* if it went, fall through and send more stuff */ | |
665 | } | |
666 | ||
d102d9df | 667 | if (s->rlayer.numwpipes < numpipes) |
58c27c20 | 668 | if (!ssl3_setup_write_buffer(s, numpipes, 0)) |
0f113f3e MC |
669 | return -1; |
670 | ||
d102d9df | 671 | if (totlen == 0 && !create_empty_fragment) |
0f113f3e MC |
672 | return 0; |
673 | ||
0f113f3e MC |
674 | sess = s->session; |
675 | ||
676 | if ((sess == NULL) || | |
a230b26e | 677 | (s->enc_write_ctx == NULL) || (EVP_MD_CTX_md(s->write_hash) == NULL)) { |
0f113f3e | 678 | clear = s->enc_write_ctx ? 0 : 1; /* must be AEAD cipher */ |
0f113f3e MC |
679 | mac_size = 0; |
680 | } else { | |
7ee8627f | 681 | /* TODO(siz_t): Convert me */ |
0f113f3e MC |
682 | mac_size = EVP_MD_CTX_size(s->write_hash); |
683 | if (mac_size < 0) | |
684 | goto err; | |
685 | } | |
d02b48c6 | 686 | |
0f113f3e MC |
687 | /* |
688 | * 'create_empty_fragment' is true only when this function calls itself | |
689 | */ | |
690 | if (!clear && !create_empty_fragment && !s->s3->empty_fragment_done) { | |
691 | /* | |
692 | * countermeasure against known-IV weakness in CBC ciphersuites (see | |
693 | * http://www.openssl.org/~bodo/tls-cbc.txt) | |
694 | */ | |
695 | ||
696 | if (s->s3->need_empty_fragments && type == SSL3_RT_APPLICATION_DATA) { | |
697 | /* | |
698 | * recursive function call with 'create_empty_fragment' set; this | |
699 | * prepares and buffers the data for an empty fragment (these | |
700 | * 'prefix_len' bytes are sent out later together with the actual | |
701 | * payload) | |
702 | */ | |
7ee8627f MC |
703 | size_t tmppipelen = 0; |
704 | int ret; | |
d102d9df | 705 | |
7ee8627f MC |
706 | ret = do_ssl3_write(s, type, buf, &tmppipelen, 1, 1, &prefix_len); |
707 | if (ret <= 0) | |
0f113f3e MC |
708 | goto err; |
709 | ||
710 | if (prefix_len > | |
a230b26e | 711 | (SSL3_RT_HEADER_LENGTH + SSL3_RT_SEND_MAX_ENCRYPTED_OVERHEAD)) { |
0f113f3e MC |
712 | /* insufficient space */ |
713 | SSLerr(SSL_F_DO_SSL3_WRITE, ERR_R_INTERNAL_ERROR); | |
714 | goto err; | |
715 | } | |
716 | } | |
717 | ||
718 | s->s3->empty_fragment_done = 1; | |
719 | } | |
720 | ||
721 | if (create_empty_fragment) { | |
d102d9df | 722 | wb = &s->rlayer.wbuf[0]; |
a4d64c7f | 723 | #if defined(SSL3_ALIGN_PAYLOAD) && SSL3_ALIGN_PAYLOAD!=0 |
0f113f3e MC |
724 | /* |
725 | * extra fragment would be couple of cipher blocks, which would be | |
726 | * multiple of SSL3_ALIGN_PAYLOAD, so if we want to align the real | |
8483a003 | 727 | * payload, then we can just pretend we simply have two headers. |
0f113f3e | 728 | */ |
f4bd5de5 | 729 | align = (size_t)SSL3_BUFFER_get_buf(wb) + 2 * SSL3_RT_HEADER_LENGTH; |
753be41d | 730 | align = SSL3_ALIGN_PAYLOAD - 1 - ((align - 1) % SSL3_ALIGN_PAYLOAD); |
a4d64c7f | 731 | #endif |
747e1639 | 732 | SSL3_BUFFER_set_offset(wb, align); |
c7c42022 MC |
733 | if (!WPACKET_init_static_len(&pkt[0], SSL3_BUFFER_get_buf(wb), |
734 | SSL3_BUFFER_get_len(wb), 0) | |
735 | || !WPACKET_allocate_bytes(&pkt[0], align, NULL)) { | |
736 | SSLerr(SSL_F_DO_SSL3_WRITE, ERR_R_INTERNAL_ERROR); | |
737 | goto err; | |
738 | } | |
739 | wpinited = 1; | |
0f113f3e | 740 | } else if (prefix_len) { |
d102d9df | 741 | wb = &s->rlayer.wbuf[0]; |
44e58f3b MC |
742 | if (!WPACKET_init_static_len(&pkt[0], |
743 | SSL3_BUFFER_get_buf(wb), | |
c7c42022 MC |
744 | SSL3_BUFFER_get_len(wb), 0) |
745 | || !WPACKET_allocate_bytes(&pkt[0], SSL3_BUFFER_get_offset(wb) | |
746 | + prefix_len, NULL)) { | |
747 | SSLerr(SSL_F_DO_SSL3_WRITE, ERR_R_INTERNAL_ERROR); | |
748 | goto err; | |
749 | } | |
750 | wpinited = 1; | |
0f113f3e | 751 | } else { |
a230b26e | 752 | for (j = 0; j < numpipes; j++) { |
44e58f3b MC |
753 | thispkt = &pkt[j]; |
754 | ||
d102d9df | 755 | wb = &s->rlayer.wbuf[j]; |
829754a6 | 756 | #if defined(SSL3_ALIGN_PAYLOAD) && SSL3_ALIGN_PAYLOAD != 0 |
d102d9df | 757 | align = (size_t)SSL3_BUFFER_get_buf(wb) + SSL3_RT_HEADER_LENGTH; |
753be41d | 758 | align = SSL3_ALIGN_PAYLOAD - 1 - ((align - 1) % SSL3_ALIGN_PAYLOAD); |
a4d64c7f | 759 | #endif |
d102d9df | 760 | SSL3_BUFFER_set_offset(wb, align); |
44e58f3b | 761 | if (!WPACKET_init_static_len(thispkt, SSL3_BUFFER_get_buf(wb), |
c7c42022 | 762 | SSL3_BUFFER_get_len(wb), 0) |
44e58f3b | 763 | || !WPACKET_allocate_bytes(thispkt, align, NULL)) { |
c7c42022 MC |
764 | SSLerr(SSL_F_DO_SSL3_WRITE, ERR_R_INTERNAL_ERROR); |
765 | goto err; | |
766 | } | |
767 | wpinited++; | |
d102d9df | 768 | } |
0f113f3e MC |
769 | } |
770 | ||
0f113f3e | 771 | /* Explicit IV length, block ciphers appropriate version flag */ |
49e7fe12 | 772 | if (s->enc_write_ctx && SSL_USE_EXPLICIT_IV(s) && !SSL_TREAT_AS_TLS13(s)) { |
0f113f3e MC |
773 | int mode = EVP_CIPHER_CTX_mode(s->enc_write_ctx); |
774 | if (mode == EVP_CIPH_CBC_MODE) { | |
7ee8627f | 775 | /* TODO(size_t): Convert me */ |
0f113f3e MC |
776 | eivlen = EVP_CIPHER_CTX_iv_length(s->enc_write_ctx); |
777 | if (eivlen <= 1) | |
778 | eivlen = 0; | |
c7c42022 MC |
779 | } else if (mode == EVP_CIPH_GCM_MODE) { |
780 | /* Need explicit part of IV for GCM mode */ | |
0f113f3e | 781 | eivlen = EVP_GCM_TLS_EXPLICIT_IV_LEN; |
c7c42022 | 782 | } else if (mode == EVP_CIPH_CCM_MODE) { |
e75c5a79 | 783 | eivlen = EVP_CCM_TLS_EXPLICIT_IV_LEN; |
c7c42022 | 784 | } |
c7c42022 | 785 | } |
0f113f3e | 786 | |
d102d9df MC |
787 | totlen = 0; |
788 | /* Clear our SSL3_RECORD structures */ | |
789 | memset(wr, 0, sizeof wr); | |
a230b26e | 790 | for (j = 0; j < numpipes; j++) { |
49e7fe12 | 791 | unsigned int version = SSL_TREAT_AS_TLS13(s) ? TLS1_VERSION : s->version; |
e8eb224b | 792 | unsigned char *compressdata = NULL; |
c7c42022 | 793 | size_t maxcomplen; |
e60ce9c4 | 794 | unsigned int rectype; |
0f113f3e | 795 | |
44e58f3b MC |
796 | thispkt = &pkt[j]; |
797 | thiswr = &wr[j]; | |
798 | ||
799 | SSL3_RECORD_set_type(thiswr, type); | |
e60ce9c4 MC |
800 | /* |
801 | * In TLSv1.3, once encrypting, we always use application data for the | |
802 | * record type | |
803 | */ | |
49e7fe12 | 804 | if (SSL_TREAT_AS_TLS13(s) && s->enc_write_ctx != NULL) |
e60ce9c4 MC |
805 | rectype = SSL3_RT_APPLICATION_DATA; |
806 | else | |
807 | rectype = type; | |
d102d9df | 808 | /* |
8483a003 | 809 | * Some servers hang if initial client hello is larger than 256 bytes |
d102d9df MC |
810 | * and record version number > TLS 1.0 |
811 | */ | |
812 | if (SSL_get_state(s) == TLS_ST_CW_CLNT_HELLO | |
813 | && !s->renegotiate && TLS1_get_version(s) > TLS1_VERSION) | |
c7c42022 | 814 | version = TLS1_VERSION; |
0f113f3e | 815 | |
44e58f3b MC |
816 | maxcomplen = pipelens[j]; |
817 | if (s->compress != NULL) | |
f33f9dde | 818 | maxcomplen += SSL3_RT_MAX_COMPRESSED_OVERHEAD; |
44e58f3b | 819 | |
c7c42022 | 820 | /* write the header */ |
44e58f3b MC |
821 | if (!WPACKET_put_bytes_u8(thispkt, rectype) |
822 | || !WPACKET_put_bytes_u16(thispkt, version) | |
823 | || !WPACKET_start_sub_packet_u16(thispkt) | |
c7c42022 | 824 | || (eivlen > 0 |
44e58f3b | 825 | && !WPACKET_allocate_bytes(thispkt, eivlen, NULL)) |
c7c42022 | 826 | || (maxcomplen > 0 |
44e58f3b | 827 | && !WPACKET_reserve_bytes(thispkt, maxcomplen, |
c7c42022 MC |
828 | &compressdata))) { |
829 | SSLerr(SSL_F_DO_SSL3_WRITE, ERR_R_INTERNAL_ERROR); | |
830 | goto err; | |
831 | } | |
0f113f3e | 832 | |
d102d9df | 833 | /* lets setup the record stuff. */ |
44e58f3b MC |
834 | SSL3_RECORD_set_data(thiswr, compressdata); |
835 | SSL3_RECORD_set_length(thiswr, pipelens[j]); | |
836 | SSL3_RECORD_set_input(thiswr, (unsigned char *)&buf[totlen]); | |
d102d9df | 837 | totlen += pipelens[j]; |
0f113f3e | 838 | |
d102d9df | 839 | /* |
44e58f3b MC |
840 | * we now 'read' from thiswr->input, thiswr->length bytes into |
841 | * thiswr->data | |
d102d9df | 842 | */ |
0f113f3e | 843 | |
d102d9df MC |
844 | /* first we compress */ |
845 | if (s->compress != NULL) { | |
e60ce9c4 MC |
846 | /* |
847 | * TODO(TLS1.3): Make sure we prevent compression!!! | |
848 | */ | |
44e58f3b MC |
849 | if (!ssl3_do_compress(s, thiswr) |
850 | || !WPACKET_allocate_bytes(thispkt, thiswr->length, NULL)) { | |
d102d9df MC |
851 | SSLerr(SSL_F_DO_SSL3_WRITE, SSL_R_COMPRESSION_FAILURE); |
852 | goto err; | |
853 | } | |
854 | } else { | |
44e58f3b | 855 | if (!WPACKET_memcpy(thispkt, thiswr->input, thiswr->length)) { |
c7c42022 MC |
856 | SSLerr(SSL_F_DO_SSL3_WRITE, ERR_R_INTERNAL_ERROR); |
857 | goto err; | |
858 | } | |
d102d9df MC |
859 | SSL3_RECORD_reset_input(&wr[j]); |
860 | } | |
0f113f3e | 861 | |
49e7fe12 | 862 | if (SSL_TREAT_AS_TLS13(s) && s->enc_write_ctx != NULL) { |
96c9aee2 | 863 | size_t rlen; |
c649d10d | 864 | |
44e58f3b | 865 | if (!WPACKET_put_bytes_u8(thispkt, type)) { |
e60ce9c4 MC |
866 | SSLerr(SSL_F_DO_SSL3_WRITE, ERR_R_INTERNAL_ERROR); |
867 | goto err; | |
868 | } | |
44e58f3b | 869 | SSL3_RECORD_add_length(thiswr, 1); |
c649d10d TS |
870 | |
871 | /* Add TLS1.3 padding */ | |
96c9aee2 TS |
872 | rlen = SSL3_RECORD_get_length(thiswr); |
873 | if (rlen < SSL3_RT_MAX_PLAIN_LENGTH) { | |
874 | size_t padding = 0; | |
875 | size_t max_padding = SSL3_RT_MAX_PLAIN_LENGTH - rlen; | |
876 | if (s->record_padding_cb != NULL) { | |
877 | padding = s->record_padding_cb(s, type, rlen, s->record_padding_arg); | |
878 | } else if (s->block_padding > 0) { | |
879 | size_t mask = s->block_padding - 1; | |
880 | size_t remainder; | |
881 | ||
882 | /* optimize for power of 2 */ | |
883 | if ((s->block_padding & mask) == 0) | |
884 | remainder = rlen & mask; | |
885 | else | |
886 | remainder = rlen % s->block_padding; | |
887 | /* don't want to add a block of padding if we don't have to */ | |
888 | if (remainder == 0) | |
889 | padding = 0; | |
890 | else | |
891 | padding = s->block_padding - remainder; | |
892 | } | |
893 | if (padding > 0) { | |
894 | /* do not allow the record to exceed max plaintext length */ | |
895 | if (padding > max_padding) | |
896 | padding = max_padding; | |
897 | if (!WPACKET_memset(thispkt, 0, padding)) { | |
898 | SSLerr(SSL_F_DO_SSL3_WRITE, ERR_R_INTERNAL_ERROR); | |
899 | goto err; | |
900 | } | |
901 | SSL3_RECORD_add_length(thiswr, padding); | |
c649d10d | 902 | } |
c649d10d | 903 | } |
e60ce9c4 MC |
904 | } |
905 | ||
0f113f3e | 906 | /* |
44e58f3b MC |
907 | * we should still have the output to thiswr->data and the input from |
908 | * wr->input. Length should be thiswr->length. thiswr->data still points | |
909 | * in the wb->buf | |
0f113f3e | 910 | */ |
0f113f3e | 911 | |
28a31a0a | 912 | if (!SSL_WRITE_ETM(s) && mac_size != 0) { |
c7c42022 MC |
913 | unsigned char *mac; |
914 | ||
44e58f3b MC |
915 | if (!WPACKET_allocate_bytes(thispkt, mac_size, &mac) |
916 | || !s->method->ssl3_enc->mac(s, thiswr, mac, 1)) { | |
c7c42022 | 917 | SSLerr(SSL_F_DO_SSL3_WRITE, ERR_R_INTERNAL_ERROR); |
d102d9df | 918 | goto err; |
c7c42022 MC |
919 | } |
920 | } | |
921 | ||
922 | /* | |
923 | * Reserve some bytes for any growth that may occur during encryption. | |
924 | * This will be at most one cipher block or the tag length if using | |
925 | * AEAD. SSL_RT_MAX_CIPHER_BLOCK_SIZE covers either case. | |
926 | */ | |
44e58f3b | 927 | if(!WPACKET_reserve_bytes(thispkt, SSL_RT_MAX_CIPHER_BLOCK_SIZE, |
c7c42022 MC |
928 | NULL) |
929 | /* | |
930 | * We also need next the amount of bytes written to this | |
931 | * sub-packet | |
932 | */ | |
44e58f3b | 933 | || !WPACKET_get_length(thispkt, &len)) { |
c7c42022 MC |
934 | SSLerr(SSL_F_DO_SSL3_WRITE, ERR_R_INTERNAL_ERROR); |
935 | goto err; | |
d102d9df | 936 | } |
0f113f3e | 937 | |
c7c42022 | 938 | /* Get a pointer to the start of this record excluding header */ |
44e58f3b | 939 | recordstart = WPACKET_get_curr(thispkt) - len; |
c7c42022 | 940 | |
44e58f3b MC |
941 | SSL3_RECORD_set_data(thiswr, recordstart); |
942 | SSL3_RECORD_reset_input(thiswr); | |
943 | SSL3_RECORD_set_length(thiswr, len); | |
0f113f3e MC |
944 | } |
945 | ||
ef6c191b MC |
946 | if (s->early_data_state == SSL_EARLY_DATA_WRITING |
947 | || s->early_data_state == SSL_EARLY_DATA_WRITE_RETRY) { | |
49e7fe12 MC |
948 | /* |
949 | * We haven't actually negotiated the version yet, but we're trying to | |
950 | * send early data - so we need to use the the tls13enc function. | |
951 | */ | |
952 | if (tls13_enc(s, wr, numpipes, 1) < 1) | |
953 | goto err; | |
954 | } else { | |
955 | if (s->method->ssl3_enc->enc(s, wr, numpipes, 1) < 1) | |
956 | goto err; | |
957 | } | |
0f113f3e | 958 | |
a230b26e | 959 | for (j = 0; j < numpipes; j++) { |
c7c42022 MC |
960 | size_t origlen; |
961 | ||
44e58f3b MC |
962 | thispkt = &pkt[j]; |
963 | thiswr = &wr[j]; | |
964 | ||
c7c42022 | 965 | /* Allocate bytes for the encryption overhead */ |
44e58f3b | 966 | if (!WPACKET_get_length(thispkt, &origlen) |
c7c42022 | 967 | /* Encryption should never shrink the data! */ |
44e58f3b MC |
968 | || origlen > thiswr->length |
969 | || (thiswr->length > origlen | |
970 | && !WPACKET_allocate_bytes(thispkt, | |
971 | thiswr->length - origlen, NULL))) { | |
c7c42022 MC |
972 | SSLerr(SSL_F_DO_SSL3_WRITE, ERR_R_INTERNAL_ERROR); |
973 | goto err; | |
974 | } | |
28a31a0a | 975 | if (SSL_WRITE_ETM(s) && mac_size != 0) { |
c7c42022 MC |
976 | unsigned char *mac; |
977 | ||
44e58f3b MC |
978 | if (!WPACKET_allocate_bytes(thispkt, mac_size, &mac) |
979 | || !s->method->ssl3_enc->mac(s, thiswr, mac, 1)) { | |
c7c42022 | 980 | SSLerr(SSL_F_DO_SSL3_WRITE, ERR_R_INTERNAL_ERROR); |
d102d9df | 981 | goto err; |
c7c42022 | 982 | } |
44e58f3b | 983 | SSL3_RECORD_add_length(thiswr, mac_size); |
d102d9df | 984 | } |
0f113f3e | 985 | |
44e58f3b MC |
986 | if (!WPACKET_get_length(thispkt, &len) |
987 | || !WPACKET_close(thispkt)) { | |
c7c42022 MC |
988 | SSLerr(SSL_F_DO_SSL3_WRITE, ERR_R_INTERNAL_ERROR); |
989 | goto err; | |
990 | } | |
d102d9df | 991 | |
c7c42022 | 992 | if (s->msg_callback) { |
44e58f3b | 993 | recordstart = WPACKET_get_curr(thispkt) - len |
c7c42022 MC |
994 | - SSL3_RT_HEADER_LENGTH; |
995 | s->msg_callback(1, 0, SSL3_RT_HEADER, recordstart, | |
996 | SSL3_RT_HEADER_LENGTH, s, | |
d102d9df | 997 | s->msg_callback_arg); |
c7c42022 MC |
998 | } |
999 | ||
44e58f3b | 1000 | if (!WPACKET_finish(thispkt)) { |
c7c42022 MC |
1001 | SSLerr(SSL_F_DO_SSL3_WRITE, ERR_R_INTERNAL_ERROR); |
1002 | goto err; | |
1003 | } | |
0f113f3e | 1004 | |
0f113f3e | 1005 | /* |
44e58f3b MC |
1006 | * we should now have thiswr->data pointing to the encrypted data, which |
1007 | * is thiswr->length long | |
0f113f3e | 1008 | */ |
44e58f3b | 1009 | SSL3_RECORD_set_type(thiswr, type); /* not needed but helps for |
a230b26e | 1010 | * debugging */ |
44e58f3b | 1011 | SSL3_RECORD_add_length(thiswr, SSL3_RT_HEADER_LENGTH); |
d102d9df MC |
1012 | |
1013 | if (create_empty_fragment) { | |
1014 | /* | |
1015 | * we are in a recursive call; just return the length, don't write | |
1016 | * out anything here | |
1017 | */ | |
1018 | if (j > 0) { | |
1019 | /* We should never be pipelining an empty fragment!! */ | |
1020 | SSLerr(SSL_F_DO_SSL3_WRITE, ERR_R_INTERNAL_ERROR); | |
1021 | goto err; | |
1022 | } | |
44e58f3b | 1023 | *written = SSL3_RECORD_get_length(thiswr); |
7ee8627f | 1024 | return 1; |
d102d9df MC |
1025 | } |
1026 | ||
1027 | /* now let's set up wb */ | |
1028 | SSL3_BUFFER_set_left(&s->rlayer.wbuf[j], | |
44e58f3b | 1029 | prefix_len + SSL3_RECORD_get_length(thiswr)); |
0f113f3e MC |
1030 | } |
1031 | ||
0f113f3e MC |
1032 | /* |
1033 | * memorize arguments so that ssl3_write_pending can detect bad write | |
1034 | * retries later | |
1035 | */ | |
d102d9df | 1036 | s->rlayer.wpend_tot = totlen; |
f8caa3c8 MC |
1037 | s->rlayer.wpend_buf = buf; |
1038 | s->rlayer.wpend_type = type; | |
d102d9df | 1039 | s->rlayer.wpend_ret = totlen; |
0f113f3e MC |
1040 | |
1041 | /* we now just need to write the buffer */ | |
7ee8627f | 1042 | return ssl3_write_pending(s, type, buf, totlen, written); |
0f113f3e | 1043 | err: |
c7c42022 MC |
1044 | for (j = 0; j < wpinited; j++) |
1045 | WPACKET_cleanup(&pkt[j]); | |
0f113f3e MC |
1046 | return -1; |
1047 | } | |
d02b48c6 | 1048 | |
4880672a MC |
1049 | /* if s->s3->wbuf.left != 0, we need to call this |
1050 | * | |
beacb0f0 | 1051 | * Return values are as per SSL_write() |
4880672a | 1052 | */ |
7ee8627f MC |
1053 | int ssl3_write_pending(SSL *s, int type, const unsigned char *buf, size_t len, |
1054 | size_t *written) | |
0f113f3e MC |
1055 | { |
1056 | int i; | |
d102d9df | 1057 | SSL3_BUFFER *wb = s->rlayer.wbuf; |
7ee8627f | 1058 | size_t currbuf = 0; |
f0ca8f89 | 1059 | size_t tmpwrit = 0; |
d02b48c6 | 1060 | |
7ee8627f | 1061 | if ((s->rlayer.wpend_tot > len) |
f8caa3c8 | 1062 | || ((s->rlayer.wpend_buf != buf) && |
0f113f3e | 1063 | !(s->mode & SSL_MODE_ACCEPT_MOVING_WRITE_BUFFER)) |
f8caa3c8 | 1064 | || (s->rlayer.wpend_type != type)) { |
0f113f3e | 1065 | SSLerr(SSL_F_SSL3_WRITE_PENDING, SSL_R_BAD_WRITE_RETRY); |
7ee8627f | 1066 | return -1; |
0f113f3e MC |
1067 | } |
1068 | ||
1069 | for (;;) { | |
d102d9df MC |
1070 | /* Loop until we find a buffer we haven't written out yet */ |
1071 | if (SSL3_BUFFER_get_left(&wb[currbuf]) == 0 | |
a230b26e | 1072 | && currbuf < s->rlayer.numwpipes - 1) { |
d102d9df MC |
1073 | currbuf++; |
1074 | continue; | |
1075 | } | |
0f113f3e MC |
1076 | clear_sys_error(); |
1077 | if (s->wbio != NULL) { | |
1078 | s->rwstate = SSL_WRITING; | |
7ee8627f | 1079 | /* TODO(size_t): Convert this call */ |
a230b26e EK |
1080 | i = BIO_write(s->wbio, (char *) |
1081 | &(SSL3_BUFFER_get_buf(&wb[currbuf]) | |
1082 | [SSL3_BUFFER_get_offset(&wb[currbuf])]), | |
1083 | (unsigned int)SSL3_BUFFER_get_left(&wb[currbuf])); | |
7ee8627f MC |
1084 | if (i >= 0) |
1085 | tmpwrit = i; | |
0f113f3e MC |
1086 | } else { |
1087 | SSLerr(SSL_F_SSL3_WRITE_PENDING, SSL_R_BIO_NOT_SET); | |
1088 | i = -1; | |
1089 | } | |
7ee8627f | 1090 | if (i > 0 && tmpwrit == SSL3_BUFFER_get_left(&wb[currbuf])) { |
d102d9df | 1091 | SSL3_BUFFER_set_left(&wb[currbuf], 0); |
7ee8627f | 1092 | SSL3_BUFFER_add_offset(&wb[currbuf], tmpwrit); |
d102d9df MC |
1093 | if (currbuf + 1 < s->rlayer.numwpipes) |
1094 | continue; | |
0f113f3e | 1095 | s->rwstate = SSL_NOTHING; |
7ee8627f MC |
1096 | *written = s->rlayer.wpend_ret; |
1097 | return 1; | |
0f113f3e | 1098 | } else if (i <= 0) { |
5e8b24db | 1099 | if (SSL_IS_DTLS(s)) { |
0f113f3e MC |
1100 | /* |
1101 | * For DTLS, just drop it. That's kind of the whole point in | |
1102 | * using a datagram service | |
1103 | */ | |
d102d9df | 1104 | SSL3_BUFFER_set_left(&wb[currbuf], 0); |
0f113f3e | 1105 | } |
beacb0f0 | 1106 | return (i); |
0f113f3e | 1107 | } |
7ee8627f MC |
1108 | SSL3_BUFFER_add_offset(&wb[currbuf], tmpwrit); |
1109 | SSL3_BUFFER_sub_left(&wb[currbuf], tmpwrit); | |
0f113f3e MC |
1110 | } |
1111 | } | |
d02b48c6 | 1112 | |
1d97c843 TH |
1113 | /*- |
1114 | * Return up to 'len' payload bytes received in 'type' records. | |
b35e9050 BM |
1115 | * 'type' is one of the following: |
1116 | * | |
1117 | * - SSL3_RT_HANDSHAKE (when ssl3_get_message calls us) | |
1118 | * - SSL3_RT_APPLICATION_DATA (when ssl3_read calls us) | |
1119 | * - 0 (during a shutdown, no data has to be returned) | |
1120 | * | |
1121 | * If we don't have stored data to work from, read a SSL/TLS record first | |
1122 | * (possibly multiple records if we still don't have anything to return). | |
1123 | * | |
1124 | * This function must handle any surprises the peer may have for us, such as | |
657da85e MC |
1125 | * Alert records (e.g. close_notify) or renegotiation requests. ChangeCipherSpec |
1126 | * messages are treated as if they were handshake messages *if* the |recd_type| | |
1127 | * argument is non NULL. | |
b35e9050 BM |
1128 | * Also if record payloads contain fragments too small to process, we store |
1129 | * them until there is enough for the respective protocol (the record protocol | |
1130 | * may use arbitrary fragmentation and even interleaving): | |
1131 | * Change cipher spec protocol | |
1132 | * just 1 byte needed, no need for keeping anything stored | |
1133 | * Alert protocol | |
1134 | * 2 bytes needed (AlertLevel, AlertDescription) | |
1135 | * Handshake protocol | |
1136 | * 4 bytes needed (HandshakeType, uint24 length) -- we just have | |
1137 | * to detect unexpected Client Hello and Hello Request messages | |
1138 | * here, anything else is handled by higher layers | |
1139 | * Application data protocol | |
1140 | * none of our business | |
1141 | */ | |
657da85e | 1142 | int ssl3_read_bytes(SSL *s, int type, int *recvd_type, unsigned char *buf, |
54105ddd | 1143 | size_t len, int peek, size_t *readbytes) |
0f113f3e MC |
1144 | { |
1145 | int al, i, j, ret; | |
54105ddd | 1146 | size_t n, curr_rec, num_recs, totalbytes; |
0f113f3e | 1147 | SSL3_RECORD *rr; |
94777c9c | 1148 | SSL3_BUFFER *rbuf; |
0f113f3e MC |
1149 | void (*cb) (const SSL *ssl, int type2, int val) = NULL; |
1150 | ||
94777c9c MC |
1151 | rbuf = &s->rlayer.rbuf; |
1152 | ||
1153 | if (!SSL3_BUFFER_is_initialised(rbuf)) { | |
28d59af8 | 1154 | /* Not initialized yet */ |
0f113f3e | 1155 | if (!ssl3_setup_read_buffer(s)) |
eda75751 | 1156 | return -1; |
28d59af8 | 1157 | } |
0f113f3e MC |
1158 | |
1159 | if ((type && (type != SSL3_RT_APPLICATION_DATA) | |
1160 | && (type != SSL3_RT_HANDSHAKE)) || (peek | |
1161 | && (type != | |
1162 | SSL3_RT_APPLICATION_DATA))) { | |
1163 | SSLerr(SSL_F_SSL3_READ_BYTES, ERR_R_INTERNAL_ERROR); | |
1164 | return -1; | |
1165 | } | |
1166 | ||
4aa7389e | 1167 | if ((type == SSL3_RT_HANDSHAKE) && (s->rlayer.handshake_fragment_len > 0)) |
0f113f3e MC |
1168 | /* (partially) satisfy request from storage */ |
1169 | { | |
4aa7389e | 1170 | unsigned char *src = s->rlayer.handshake_fragment; |
0f113f3e MC |
1171 | unsigned char *dst = buf; |
1172 | unsigned int k; | |
1173 | ||
1174 | /* peek == 0 */ | |
1175 | n = 0; | |
4aa7389e | 1176 | while ((len > 0) && (s->rlayer.handshake_fragment_len > 0)) { |
0f113f3e MC |
1177 | *dst++ = *src++; |
1178 | len--; | |
4aa7389e | 1179 | s->rlayer.handshake_fragment_len--; |
0f113f3e MC |
1180 | n++; |
1181 | } | |
1182 | /* move any remaining fragment bytes: */ | |
4aa7389e MC |
1183 | for (k = 0; k < s->rlayer.handshake_fragment_len; k++) |
1184 | s->rlayer.handshake_fragment[k] = *src++; | |
e9f6b9a1 MC |
1185 | |
1186 | if (recvd_type != NULL) | |
1187 | *recvd_type = SSL3_RT_HANDSHAKE; | |
1188 | ||
54105ddd | 1189 | *readbytes = n; |
eda75751 | 1190 | return 1; |
0f113f3e MC |
1191 | } |
1192 | ||
1193 | /* | |
4aa7389e | 1194 | * Now s->rlayer.handshake_fragment_len == 0 if type == SSL3_RT_HANDSHAKE. |
0f113f3e MC |
1195 | */ |
1196 | ||
024f543c | 1197 | if (!ossl_statem_get_in_handshake(s) && SSL_in_init(s)) { |
0f113f3e MC |
1198 | /* type == SSL3_RT_APPLICATION_DATA */ |
1199 | i = s->handshake_func(s); | |
1200 | if (i < 0) | |
eda75751 | 1201 | return i; |
0f113f3e MC |
1202 | if (i == 0) { |
1203 | SSLerr(SSL_F_SSL3_READ_BYTES, SSL_R_SSL_HANDSHAKE_FAILURE); | |
eda75751 | 1204 | return -1; |
0f113f3e MC |
1205 | } |
1206 | } | |
1207 | start: | |
1208 | s->rwstate = SSL_NOTHING; | |
1209 | ||
50e735f9 | 1210 | /*- |
94777c9c MC |
1211 | * For each record 'i' up to |num_recs] |
1212 | * rr[i].type - is the type of record | |
1213 | * rr[i].data, - data | |
1214 | * rr[i].off, - offset into 'data' for next read | |
1215 | * rr[i].length, - number of bytes. | |
50e735f9 | 1216 | */ |
94777c9c MC |
1217 | rr = s->rlayer.rrec; |
1218 | num_recs = RECORD_LAYER_get_numrpipes(&s->rlayer); | |
1219 | ||
1220 | do { | |
1221 | /* get new records if necessary */ | |
1222 | if (num_recs == 0) { | |
1223 | ret = ssl3_get_record(s); | |
1224 | if (ret <= 0) | |
eda75751 | 1225 | return ret; |
94777c9c MC |
1226 | num_recs = RECORD_LAYER_get_numrpipes(&s->rlayer); |
1227 | if (num_recs == 0) { | |
1228 | /* Shouldn't happen */ | |
1229 | al = SSL_AD_INTERNAL_ERROR; | |
1230 | SSLerr(SSL_F_SSL3_READ_BYTES, ERR_R_INTERNAL_ERROR); | |
1231 | goto f_err; | |
1232 | } | |
1233 | } | |
255cfeac | 1234 | /* Skip over any records we have already read */ |
94777c9c | 1235 | for (curr_rec = 0; |
255cfeac | 1236 | curr_rec < num_recs && SSL3_RECORD_is_read(&rr[curr_rec]); |
a230b26e | 1237 | curr_rec++) ; |
94777c9c MC |
1238 | if (curr_rec == num_recs) { |
1239 | RECORD_LAYER_set_numrpipes(&s->rlayer, 0); | |
1240 | num_recs = 0; | |
1241 | curr_rec = 0; | |
1242 | } | |
1243 | } while (num_recs == 0); | |
1244 | rr = &rr[curr_rec]; | |
0f113f3e | 1245 | |
af58be76 MC |
1246 | /* |
1247 | * Reset the count of consecutive warning alerts if we've got a non-empty | |
1248 | * record that isn't an alert. | |
1249 | */ | |
1250 | if (SSL3_RECORD_get_type(rr) != SSL3_RT_ALERT | |
1251 | && SSL3_RECORD_get_length(rr) != 0) | |
1252 | s->rlayer.alert_count = 0; | |
1253 | ||
0f113f3e MC |
1254 | /* we now have a packet which can be read and processed */ |
1255 | ||
1256 | if (s->s3->change_cipher_spec /* set when we receive ChangeCipherSpec, | |
1257 | * reset by ssl3_get_finished */ | |
747e1639 | 1258 | && (SSL3_RECORD_get_type(rr) != SSL3_RT_HANDSHAKE)) { |
0f113f3e MC |
1259 | al = SSL_AD_UNEXPECTED_MESSAGE; |
1260 | SSLerr(SSL_F_SSL3_READ_BYTES, SSL_R_DATA_BETWEEN_CCS_AND_FINISHED); | |
1261 | goto f_err; | |
1262 | } | |
1263 | ||
1264 | /* | |
1265 | * If the other end has shut down, throw anything we read away (even in | |
1266 | * 'peek' mode) | |
1267 | */ | |
1268 | if (s->shutdown & SSL_RECEIVED_SHUTDOWN) { | |
747e1639 | 1269 | SSL3_RECORD_set_length(rr, 0); |
0f113f3e | 1270 | s->rwstate = SSL_NOTHING; |
eda75751 | 1271 | return 0; |
0f113f3e MC |
1272 | } |
1273 | ||
657da85e | 1274 | if (type == SSL3_RECORD_get_type(rr) |
a230b26e | 1275 | || (SSL3_RECORD_get_type(rr) == SSL3_RT_CHANGE_CIPHER_SPEC |
97997489 MC |
1276 | && type == SSL3_RT_HANDSHAKE && recvd_type != NULL |
1277 | && !SSL_IS_TLS13(s))) { | |
657da85e MC |
1278 | /* |
1279 | * SSL3_RT_APPLICATION_DATA or | |
1280 | * SSL3_RT_HANDSHAKE or | |
1281 | * SSL3_RT_CHANGE_CIPHER_SPEC | |
1282 | */ | |
0f113f3e MC |
1283 | /* |
1284 | * make sure that we are not getting application data when we are | |
1285 | * doing a handshake for the first time | |
1286 | */ | |
1287 | if (SSL_in_init(s) && (type == SSL3_RT_APPLICATION_DATA) && | |
1288 | (s->enc_read_ctx == NULL)) { | |
1289 | al = SSL_AD_UNEXPECTED_MESSAGE; | |
1290 | SSLerr(SSL_F_SSL3_READ_BYTES, SSL_R_APP_DATA_IN_HANDSHAKE); | |
1291 | goto f_err; | |
1292 | } | |
1293 | ||
657da85e | 1294 | if (type == SSL3_RT_HANDSHAKE |
a230b26e EK |
1295 | && SSL3_RECORD_get_type(rr) == SSL3_RT_CHANGE_CIPHER_SPEC |
1296 | && s->rlayer.handshake_fragment_len > 0) { | |
657da85e MC |
1297 | al = SSL_AD_UNEXPECTED_MESSAGE; |
1298 | SSLerr(SSL_F_SSL3_READ_BYTES, SSL_R_CCS_RECEIVED_EARLY); | |
1299 | goto f_err; | |
1300 | } | |
1301 | ||
1302 | if (recvd_type != NULL) | |
1303 | *recvd_type = SSL3_RECORD_get_type(rr); | |
1304 | ||
eda75751 MC |
1305 | if (len == 0) |
1306 | return 0; | |
0f113f3e | 1307 | |
54105ddd | 1308 | totalbytes = 0; |
94777c9c | 1309 | do { |
54105ddd | 1310 | if (len - totalbytes > SSL3_RECORD_get_length(rr)) |
94777c9c MC |
1311 | n = SSL3_RECORD_get_length(rr); |
1312 | else | |
54105ddd | 1313 | n = len - totalbytes; |
94777c9c MC |
1314 | |
1315 | memcpy(buf, &(rr->data[rr->off]), n); | |
1316 | buf += n; | |
b8d24395 MC |
1317 | if (peek) { |
1318 | /* Mark any zero length record as consumed CVE-2016-6305 */ | |
1319 | if (SSL3_RECORD_get_length(rr) == 0) | |
1320 | SSL3_RECORD_set_read(rr); | |
1321 | } else { | |
753be41d | 1322 | SSL3_RECORD_sub_length(rr, n); |
94777c9c MC |
1323 | SSL3_RECORD_add_off(rr, n); |
1324 | if (SSL3_RECORD_get_length(rr) == 0) { | |
1325 | s->rlayer.rstate = SSL_ST_READ_HEADER; | |
1326 | SSL3_RECORD_set_off(rr, 0); | |
255cfeac | 1327 | SSL3_RECORD_set_read(rr); |
94777c9c | 1328 | } |
0f113f3e | 1329 | } |
94777c9c MC |
1330 | if (SSL3_RECORD_get_length(rr) == 0 |
1331 | || (peek && n == SSL3_RECORD_get_length(rr))) { | |
1332 | curr_rec++; | |
1333 | rr++; | |
1334 | } | |
54105ddd | 1335 | totalbytes += n; |
94777c9c | 1336 | } while (type == SSL3_RT_APPLICATION_DATA && curr_rec < num_recs |
54105ddd MC |
1337 | && totalbytes < len); |
1338 | if (totalbytes == 0) { | |
255cfeac MC |
1339 | /* We must have read empty records. Get more data */ |
1340 | goto start; | |
1341 | } | |
94777c9c | 1342 | if (!peek && curr_rec == num_recs |
a230b26e EK |
1343 | && (s->mode & SSL_MODE_RELEASE_BUFFERS) |
1344 | && SSL3_BUFFER_get_left(rbuf) == 0) | |
94777c9c | 1345 | ssl3_release_read_buffer(s); |
54105ddd | 1346 | *readbytes = totalbytes; |
eda75751 | 1347 | return 1; |
0f113f3e MC |
1348 | } |
1349 | ||
1350 | /* | |
1351 | * If we get here, then type != rr->type; if we have a handshake message, | |
657da85e MC |
1352 | * then it was unexpected (Hello Request or Client Hello) or invalid (we |
1353 | * were actually expecting a CCS). | |
0f113f3e MC |
1354 | */ |
1355 | ||
32ec4153 MC |
1356 | /* |
1357 | * Lets just double check that we've not got an SSLv2 record | |
1358 | */ | |
1359 | if (rr->rec_version == SSL2_VERSION) { | |
1360 | /* | |
1361 | * Should never happen. ssl3_get_record() should only give us an SSLv2 | |
1362 | * record back if this is the first packet and we are looking for an | |
1363 | * initial ClientHello. Therefore |type| should always be equal to | |
1364 | * |rr->type|. If not then something has gone horribly wrong | |
1365 | */ | |
1366 | al = SSL_AD_INTERNAL_ERROR; | |
1367 | SSLerr(SSL_F_SSL3_READ_BYTES, ERR_R_INTERNAL_ERROR); | |
1368 | goto f_err; | |
1369 | } | |
1370 | ||
e8aa8b6c | 1371 | if (s->method->version == TLS_ANY_VERSION |
a230b26e | 1372 | && (s->server || rr->type != SSL3_RT_ALERT)) { |
13c9bb3e MC |
1373 | /* |
1374 | * If we've got this far and still haven't decided on what version | |
1375 | * we're using then this must be a client side alert we're dealing with | |
1376 | * (we don't allow heartbeats yet). We shouldn't be receiving anything | |
1377 | * other than a ClientHello if we are a server. | |
1378 | */ | |
1379 | s->version = rr->rec_version; | |
1380 | al = SSL_AD_UNEXPECTED_MESSAGE; | |
1381 | SSLerr(SSL_F_SSL3_READ_BYTES, SSL_R_UNEXPECTED_MESSAGE); | |
1382 | goto f_err; | |
1383 | } | |
1384 | ||
0f113f3e MC |
1385 | /* |
1386 | * In case of record types for which we have 'fragment' storage, fill | |
1387 | * that so that we can process the data at a fixed place. | |
1388 | */ | |
1389 | { | |
eda75751 | 1390 | size_t dest_maxlen = 0; |
0f113f3e | 1391 | unsigned char *dest = NULL; |
eda75751 | 1392 | size_t *dest_len = NULL; |
0f113f3e | 1393 | |
747e1639 | 1394 | if (SSL3_RECORD_get_type(rr) == SSL3_RT_HANDSHAKE) { |
4aa7389e MC |
1395 | dest_maxlen = sizeof s->rlayer.handshake_fragment; |
1396 | dest = s->rlayer.handshake_fragment; | |
1397 | dest_len = &s->rlayer.handshake_fragment_len; | |
747e1639 | 1398 | } else if (SSL3_RECORD_get_type(rr) == SSL3_RT_ALERT) { |
4aa7389e MC |
1399 | dest_maxlen = sizeof s->rlayer.alert_fragment; |
1400 | dest = s->rlayer.alert_fragment; | |
1401 | dest_len = &s->rlayer.alert_fragment_len; | |
0f113f3e | 1402 | } |
b35e9050 | 1403 | |
0f113f3e MC |
1404 | if (dest_maxlen > 0) { |
1405 | n = dest_maxlen - *dest_len; /* available space in 'dest' */ | |
747e1639 MC |
1406 | if (SSL3_RECORD_get_length(rr) < n) |
1407 | n = SSL3_RECORD_get_length(rr); /* available bytes */ | |
0f113f3e MC |
1408 | |
1409 | /* now move 'n' bytes: */ | |
ef6c191b MC |
1410 | memcpy(dest + *dest_len, |
1411 | SSL3_RECORD_get_data(rr) + SSL3_RECORD_get_off(rr), n); | |
1412 | SSL3_RECORD_add_off(rr, n); | |
1413 | SSL3_RECORD_add_length(rr, -n); | |
1414 | *dest_len += n; | |
1415 | if (SSL3_RECORD_get_length(rr) == 0) | |
63916e9a | 1416 | SSL3_RECORD_set_read(rr); |
ef6c191b MC |
1417 | |
1418 | if (*dest_len < dest_maxlen) | |
0f113f3e MC |
1419 | goto start; /* fragment was too small */ |
1420 | } | |
1421 | } | |
1422 | ||
50e735f9 | 1423 | /*- |
4aa7389e MC |
1424 | * s->rlayer.handshake_fragment_len == 4 iff rr->type == SSL3_RT_HANDSHAKE; |
1425 | * s->rlayer.alert_fragment_len == 2 iff rr->type == SSL3_RT_ALERT. | |
50e735f9 MC |
1426 | * (Possibly rr is 'empty' now, i.e. rr->length may be 0.) |
1427 | */ | |
0f113f3e | 1428 | |
0f113f3e MC |
1429 | /* |
1430 | * If we are a server and get a client hello when renegotiation isn't | |
1431 | * allowed send back a no renegotiation alert and carry on. WARNING: | |
1432 | * experimental code, needs reviewing (steve) | |
1433 | */ | |
1434 | if (s->server && | |
1435 | SSL_is_init_finished(s) && | |
1436 | !s->s3->send_connection_binding && | |
1437 | (s->version > SSL3_VERSION) && | |
0386aad1 | 1438 | !SSL_IS_TLS13(s) && |
4aa7389e MC |
1439 | (s->rlayer.handshake_fragment_len >= 4) && |
1440 | (s->rlayer.handshake_fragment[0] == SSL3_MT_CLIENT_HELLO) && | |
0f113f3e MC |
1441 | (s->session != NULL) && (s->session->cipher != NULL) && |
1442 | !(s->ctx->options & SSL_OP_ALLOW_UNSAFE_LEGACY_RENEGOTIATION)) { | |
747e1639 | 1443 | SSL3_RECORD_set_length(rr, 0); |
63916e9a | 1444 | SSL3_RECORD_set_read(rr); |
0f113f3e MC |
1445 | ssl3_send_alert(s, SSL3_AL_WARNING, SSL_AD_NO_RENEGOTIATION); |
1446 | goto start; | |
1447 | } | |
4aa7389e MC |
1448 | if (s->rlayer.alert_fragment_len >= 2) { |
1449 | int alert_level = s->rlayer.alert_fragment[0]; | |
1450 | int alert_descr = s->rlayer.alert_fragment[1]; | |
0f113f3e | 1451 | |
4aa7389e | 1452 | s->rlayer.alert_fragment_len = 0; |
0f113f3e MC |
1453 | |
1454 | if (s->msg_callback) | |
1455 | s->msg_callback(0, s->version, SSL3_RT_ALERT, | |
4aa7389e MC |
1456 | s->rlayer.alert_fragment, 2, s, |
1457 | s->msg_callback_arg); | |
0f113f3e MC |
1458 | |
1459 | if (s->info_callback != NULL) | |
1460 | cb = s->info_callback; | |
1461 | else if (s->ctx->info_callback != NULL) | |
1462 | cb = s->ctx->info_callback; | |
1463 | ||
1464 | if (cb != NULL) { | |
1465 | j = (alert_level << 8) | alert_descr; | |
1466 | cb(s, SSL_CB_READ_ALERT, j); | |
1467 | } | |
1468 | ||
fd865cad | 1469 | if (alert_level == SSL3_AL_WARNING) { |
0f113f3e | 1470 | s->s3->warn_alert = alert_descr; |
63916e9a | 1471 | SSL3_RECORD_set_read(rr); |
af58be76 MC |
1472 | |
1473 | s->rlayer.alert_count++; | |
1474 | if (s->rlayer.alert_count == MAX_WARN_ALERT_COUNT) { | |
1475 | al = SSL_AD_UNEXPECTED_MESSAGE; | |
1476 | SSLerr(SSL_F_SSL3_READ_BYTES, SSL_R_TOO_MANY_WARN_ALERTS); | |
1477 | goto f_err; | |
1478 | } | |
1479 | ||
0f113f3e MC |
1480 | if (alert_descr == SSL_AD_CLOSE_NOTIFY) { |
1481 | s->shutdown |= SSL_RECEIVED_SHUTDOWN; | |
eda75751 | 1482 | return 0; |
0f113f3e MC |
1483 | } |
1484 | /* | |
1485 | * This is a warning but we receive it if we requested | |
1486 | * renegotiation and the peer denied it. Terminate with a fatal | |
8483a003 | 1487 | * alert because if application tried to renegotiate it |
0f113f3e MC |
1488 | * presumably had a good reason and expects it to succeed. In |
1489 | * future we might have a renegotiation where we don't care if | |
1490 | * the peer refused it where we carry on. | |
1491 | */ | |
1492 | else if (alert_descr == SSL_AD_NO_RENEGOTIATION) { | |
1493 | al = SSL_AD_HANDSHAKE_FAILURE; | |
1494 | SSLerr(SSL_F_SSL3_READ_BYTES, SSL_R_NO_RENEGOTIATION); | |
1495 | goto f_err; | |
1496 | } | |
fd865cad | 1497 | } else if (alert_level == SSL3_AL_FATAL) { |
0f113f3e MC |
1498 | char tmp[16]; |
1499 | ||
1500 | s->rwstate = SSL_NOTHING; | |
1501 | s->s3->fatal_alert = alert_descr; | |
1502 | SSLerr(SSL_F_SSL3_READ_BYTES, SSL_AD_REASON_OFFSET + alert_descr); | |
1503 | BIO_snprintf(tmp, sizeof tmp, "%d", alert_descr); | |
1504 | ERR_add_error_data(2, "SSL alert number ", tmp); | |
1505 | s->shutdown |= SSL_RECEIVED_SHUTDOWN; | |
63916e9a | 1506 | SSL3_RECORD_set_read(rr); |
e2bb9b9b | 1507 | SSL_CTX_remove_session(s->session_ctx, s->session); |
eda75751 | 1508 | return 0; |
0f113f3e MC |
1509 | } else { |
1510 | al = SSL_AD_ILLEGAL_PARAMETER; | |
1511 | SSLerr(SSL_F_SSL3_READ_BYTES, SSL_R_UNKNOWN_ALERT_TYPE); | |
1512 | goto f_err; | |
1513 | } | |
1514 | ||
1515 | goto start; | |
1516 | } | |
1517 | ||
1518 | if (s->shutdown & SSL_SENT_SHUTDOWN) { /* but we have not received a | |
1519 | * shutdown */ | |
1520 | s->rwstate = SSL_NOTHING; | |
747e1639 | 1521 | SSL3_RECORD_set_length(rr, 0); |
63916e9a | 1522 | SSL3_RECORD_set_read(rr); |
eda75751 | 1523 | return 0; |
0f113f3e MC |
1524 | } |
1525 | ||
747e1639 | 1526 | if (SSL3_RECORD_get_type(rr) == SSL3_RT_CHANGE_CIPHER_SPEC) { |
657da85e MC |
1527 | al = SSL_AD_UNEXPECTED_MESSAGE; |
1528 | SSLerr(SSL_F_SSL3_READ_BYTES, SSL_R_CCS_RECEIVED_EARLY); | |
1529 | goto f_err; | |
0f113f3e MC |
1530 | } |
1531 | ||
1532 | /* | |
c7f47786 | 1533 | * Unexpected handshake message (ClientHello, NewSessionTicket (TLS1.3) or |
0386aad1 | 1534 | * protocol violation) |
0f113f3e | 1535 | */ |
024f543c | 1536 | if ((s->rlayer.handshake_fragment_len >= 4) |
c7f47786 | 1537 | && !ossl_statem_get_in_handshake(s)) { |
39ef7821 MC |
1538 | int ined = (s->early_data_state == SSL_EARLY_DATA_READING); |
1539 | ||
c7f47786 MC |
1540 | /* We found handshake data, so we're going back into init */ |
1541 | ossl_statem_set_in_init(s, 1); | |
1542 | ||
0f113f3e MC |
1543 | i = s->handshake_func(s); |
1544 | if (i < 0) | |
eda75751 | 1545 | return i; |
0f113f3e MC |
1546 | if (i == 0) { |
1547 | SSLerr(SSL_F_SSL3_READ_BYTES, SSL_R_SSL_HANDSHAKE_FAILURE); | |
eda75751 | 1548 | return -1; |
0f113f3e MC |
1549 | } |
1550 | ||
39ef7821 MC |
1551 | /* |
1552 | * If we were actually trying to read early data and we found a | |
1553 | * handshake message, then we don't want to continue to try and read | |
1554 | * the application data any more. It won't be "early" now. | |
1555 | */ | |
1556 | if (ined) | |
1557 | return -1; | |
1558 | ||
0f113f3e | 1559 | if (!(s->mode & SSL_MODE_AUTO_RETRY)) { |
94777c9c | 1560 | if (SSL3_BUFFER_get_left(rbuf) == 0) { |
28d59af8 | 1561 | /* no read-ahead left? */ |
0f113f3e MC |
1562 | BIO *bio; |
1563 | /* | |
1564 | * In the case where we try to read application data, but we | |
1565 | * trigger an SSL handshake, we return -1 with the retry | |
1566 | * option set. Otherwise renegotiation may cause nasty | |
1567 | * problems in the blocking world | |
1568 | */ | |
1569 | s->rwstate = SSL_READING; | |
1570 | bio = SSL_get_rbio(s); | |
1571 | BIO_clear_retry_flags(bio); | |
1572 | BIO_set_retry_read(bio); | |
eda75751 | 1573 | return -1; |
0f113f3e MC |
1574 | } |
1575 | } | |
1576 | goto start; | |
1577 | } | |
1578 | ||
747e1639 | 1579 | switch (SSL3_RECORD_get_type(rr)) { |
0f113f3e | 1580 | default: |
0f113f3e | 1581 | /* |
436a2a01 MC |
1582 | * TLS 1.0 and 1.1 say you SHOULD ignore unrecognised record types, but |
1583 | * TLS 1.2 says you MUST send an unexpected message alert. We use the | |
1584 | * TLS 1.2 behaviour for all protocol versions to prevent issues where | |
1585 | * no progress is being made and the peer continually sends unrecognised | |
1586 | * record types, using up resources processing them. | |
0f113f3e | 1587 | */ |
0f113f3e MC |
1588 | al = SSL_AD_UNEXPECTED_MESSAGE; |
1589 | SSLerr(SSL_F_SSL3_READ_BYTES, SSL_R_UNEXPECTED_RECORD); | |
1590 | goto f_err; | |
1591 | case SSL3_RT_CHANGE_CIPHER_SPEC: | |
1592 | case SSL3_RT_ALERT: | |
1593 | case SSL3_RT_HANDSHAKE: | |
1594 | /* | |
1595 | * we already handled all of these, with the possible exception of | |
024f543c MC |
1596 | * SSL3_RT_HANDSHAKE when ossl_statem_get_in_handshake(s) is true, but |
1597 | * that should not happen when type != rr->type | |
0f113f3e MC |
1598 | */ |
1599 | al = SSL_AD_UNEXPECTED_MESSAGE; | |
1600 | SSLerr(SSL_F_SSL3_READ_BYTES, ERR_R_INTERNAL_ERROR); | |
1601 | goto f_err; | |
1602 | case SSL3_RT_APPLICATION_DATA: | |
1603 | /* | |
1604 | * At this point, we were expecting handshake data, but have | |
1605 | * application data. If the library was running inside ssl3_read() | |
1606 | * (i.e. in_read_app_data is set) and it makes sense to read | |
1607 | * application data at this point (session renegotiation not yet | |
1608 | * started), we will indulge it. | |
1609 | */ | |
fe3a3291 | 1610 | if (ossl_statem_app_data_allowed(s)) { |
0f113f3e | 1611 | s->s3->in_read_app_data = 2; |
eda75751 | 1612 | return -1; |
a832b5ef MC |
1613 | } else if (ossl_statem_skip_early_data(s)) { |
1614 | /* | |
1615 | * This can happen after a client sends a CH followed by early_data, | |
1616 | * but the server responds with a HelloRetryRequest. The server | |
1617 | * reads the next record from the client expecting to find a | |
1618 | * plaintext ClientHello but gets a record which appears to be | |
1619 | * application data. The trial decrypt "works" because null | |
1620 | * decryption was applied. We just skip it and move on to the next | |
1621 | * record. | |
1622 | */ | |
1623 | if (!early_data_count_ok(s, rr->length, | |
1624 | EARLY_DATA_CIPHERTEXT_OVERHEAD, &al)) | |
1625 | goto f_err; | |
1626 | SSL3_RECORD_set_read(rr); | |
1627 | goto start; | |
0f113f3e MC |
1628 | } else { |
1629 | al = SSL_AD_UNEXPECTED_MESSAGE; | |
1630 | SSLerr(SSL_F_SSL3_READ_BYTES, SSL_R_UNEXPECTED_RECORD); | |
1631 | goto f_err; | |
1632 | } | |
1633 | } | |
1634 | /* not reached */ | |
1635 | ||
1636 | f_err: | |
1637 | ssl3_send_alert(s, SSL3_AL_FATAL, al); | |
eda75751 | 1638 | return -1; |
0f113f3e | 1639 | } |
d02b48c6 | 1640 | |
14daae5a MC |
1641 | void ssl3_record_sequence_update(unsigned char *seq) |
1642 | { | |
1643 | int i; | |
1644 | ||
1645 | for (i = 7; i >= 0; i--) { | |
1646 | ++seq[i]; | |
1647 | if (seq[i] != 0) | |
1648 | break; | |
1649 | } | |
1650 | } | |
1651 | ||
d45ba43d MC |
1652 | /* |
1653 | * Returns true if the current rrec was sent in SSLv2 backwards compatible | |
1654 | * format and false otherwise. | |
1655 | */ | |
32ec4153 MC |
1656 | int RECORD_LAYER_is_sslv2_record(RECORD_LAYER *rl) |
1657 | { | |
94777c9c | 1658 | return SSL3_RECORD_is_sslv2_record(&rl->rrec[0]); |
32ec4153 | 1659 | } |
0f113f3e | 1660 | |
d45ba43d MC |
1661 | /* |
1662 | * Returns the length in bytes of the current rrec | |
1663 | */ | |
eda75751 | 1664 | size_t RECORD_LAYER_get_rrec_length(RECORD_LAYER *rl) |
32ec4153 | 1665 | { |
94777c9c | 1666 | return SSL3_RECORD_get_length(&rl->rrec[0]); |
32ec4153 | 1667 | } |