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source: vbox/trunk/src/libs/openssl-1.1.1h/ssl/bio_ssl.c@ 86719

Last change on this file since 86719 was 86560, checked in by vboxsync, 4 years ago

openssl-1.1.1h: Applied our OpenSSL changes to 1.1.1h. Didn't check te build. bugref:9847
File size: 12.8 KB
Line 
1/*
2 * Copyright 1995-2020 The OpenSSL Project Authors. All Rights Reserved.
3 *
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
8 */
9
10#include <stdio.h>
11#include <stdlib.h>
12#include <string.h>
13#include <errno.h>
14#include <openssl/crypto.h>
15#include "internal/bio.h"
16#include <openssl/err.h>
17#include "ssl_local.h"
18
19static int ssl_write(BIO *h, const char *buf, size_t size, size_t *written);
20static int ssl_read(BIO *b, char *buf, size_t size, size_t *readbytes);
21static int ssl_puts(BIO *h, const char *str);
22static long ssl_ctrl(BIO *h, int cmd, long arg1, void *arg2);
23static int ssl_new(BIO *h);
24static int ssl_free(BIO *data);
25static long ssl_callback_ctrl(BIO *h, int cmd, BIO_info_cb *fp);
26typedef struct bio_ssl_st {
27 SSL *ssl; /* The ssl handle :-) */
28 /* re-negotiate every time the total number of bytes is this size */
29 int num_renegotiates;
30 unsigned long renegotiate_count;
31 size_t byte_count;
32 unsigned long renegotiate_timeout;
33 unsigned long last_time;
34} BIO_SSL;
35
36static const BIO_METHOD methods_sslp = {
37 BIO_TYPE_SSL,
38 "ssl",
39 ssl_write,
40 NULL, /* ssl_write_old, */
41 ssl_read,
42 NULL, /* ssl_read_old, */
43 ssl_puts,
44 NULL, /* ssl_gets, */
45 ssl_ctrl,
46 ssl_new,
47 ssl_free,
48 ssl_callback_ctrl,
49};
50
51const BIO_METHOD *BIO_f_ssl(void)
52{
53 return &methods_sslp;
54}
55
56static int ssl_new(BIO *bi)
57{
58 BIO_SSL *bs = OPENSSL_zalloc(sizeof(*bs));
59
60 if (bs == NULL) {
61 BIOerr(BIO_F_SSL_NEW, ERR_R_MALLOC_FAILURE);
62 return 0;
63 }
64 BIO_set_init(bi, 0);
65 BIO_set_data(bi, bs);
66 /* Clear all flags */
67 BIO_clear_flags(bi, ~0);
68
69 return 1;
70}
71
72static int ssl_free(BIO *a)
73{
74 BIO_SSL *bs;
75
76 if (a == NULL)
77 return 0;
78 bs = BIO_get_data(a);
79 if (bs->ssl != NULL)
80 SSL_shutdown(bs->ssl);
81 if (BIO_get_shutdown(a)) {
82 if (BIO_get_init(a))
83 SSL_free(bs->ssl);
84 /* Clear all flags */
85 BIO_clear_flags(a, ~0);
86 BIO_set_init(a, 0);
87 }
88 OPENSSL_free(bs);
89 return 1;
90}
91
92static int ssl_read(BIO *b, char *buf, size_t size, size_t *readbytes)
93{
94 int ret = 1;
95 BIO_SSL *sb;
96 SSL *ssl;
97 int retry_reason = 0;
98 int r = 0;
99
100 if (buf == NULL)
101 return 0;
102 sb = BIO_get_data(b);
103 ssl = sb->ssl;
104
105 BIO_clear_retry_flags(b);
106
107 ret = ssl_read_internal(ssl, buf, size, readbytes);
108
109 switch (SSL_get_error(ssl, ret)) {
110 case SSL_ERROR_NONE:
111 if (sb->renegotiate_count > 0) {
112 sb->byte_count += *readbytes;
113 if (sb->byte_count > sb->renegotiate_count) {
114 sb->byte_count = 0;
115 sb->num_renegotiates++;
116 SSL_renegotiate(ssl);
117 r = 1;
118 }
119 }
120 if ((sb->renegotiate_timeout > 0) && (!r)) {
121 unsigned long tm;
122
123 tm = (unsigned long)time(NULL);
124 if (tm > sb->last_time + sb->renegotiate_timeout) {
125 sb->last_time = tm;
126 sb->num_renegotiates++;
127 SSL_renegotiate(ssl);
128 }
129 }
130
131 break;
132 case SSL_ERROR_WANT_READ:
133 BIO_set_retry_read(b);
134 break;
135 case SSL_ERROR_WANT_WRITE:
136 BIO_set_retry_write(b);
137 break;
138 case SSL_ERROR_WANT_X509_LOOKUP:
139 BIO_set_retry_special(b);
140 retry_reason = BIO_RR_SSL_X509_LOOKUP;
141 break;
142 case SSL_ERROR_WANT_ACCEPT:
143 BIO_set_retry_special(b);
144 retry_reason = BIO_RR_ACCEPT;
145 break;
146 case SSL_ERROR_WANT_CONNECT:
147 BIO_set_retry_special(b);
148 retry_reason = BIO_RR_CONNECT;
149 break;
150 case SSL_ERROR_SYSCALL:
151 case SSL_ERROR_SSL:
152 case SSL_ERROR_ZERO_RETURN:
153 default:
154 break;
155 }
156
157 BIO_set_retry_reason(b, retry_reason);
158
159 return ret;
160}
161
162static int ssl_write(BIO *b, const char *buf, size_t size, size_t *written)
163{
164 int ret, r = 0;
165 int retry_reason = 0;
166 SSL *ssl;
167 BIO_SSL *bs;
168
169 if (buf == NULL)
170 return 0;
171 bs = BIO_get_data(b);
172 ssl = bs->ssl;
173
174 BIO_clear_retry_flags(b);
175
176 ret = ssl_write_internal(ssl, buf, size, written);
177
178 switch (SSL_get_error(ssl, ret)) {
179 case SSL_ERROR_NONE:
180 if (bs->renegotiate_count > 0) {
181 bs->byte_count += *written;
182 if (bs->byte_count > bs->renegotiate_count) {
183 bs->byte_count = 0;
184 bs->num_renegotiates++;
185 SSL_renegotiate(ssl);
186 r = 1;
187 }
188 }
189 if ((bs->renegotiate_timeout > 0) && (!r)) {
190 unsigned long tm;
191
192 tm = (unsigned long)time(NULL);
193 if (tm > bs->last_time + bs->renegotiate_timeout) {
194 bs->last_time = tm;
195 bs->num_renegotiates++;
196 SSL_renegotiate(ssl);
197 }
198 }
199 break;
200 case SSL_ERROR_WANT_WRITE:
201 BIO_set_retry_write(b);
202 break;
203 case SSL_ERROR_WANT_READ:
204 BIO_set_retry_read(b);
205 break;
206 case SSL_ERROR_WANT_X509_LOOKUP:
207 BIO_set_retry_special(b);
208 retry_reason = BIO_RR_SSL_X509_LOOKUP;
209 break;
210 case SSL_ERROR_WANT_CONNECT:
211 BIO_set_retry_special(b);
212 retry_reason = BIO_RR_CONNECT;
213 case SSL_ERROR_SYSCALL:
214 case SSL_ERROR_SSL:
215 default:
216 break;
217 }
218
219 BIO_set_retry_reason(b, retry_reason);
220
221 return ret;
222}
223
224static long ssl_ctrl(BIO *b, int cmd, long num, void *ptr)
225{
226 SSL **sslp, *ssl;
227 BIO_SSL *bs, *dbs;
228 BIO *dbio, *bio;
229 long ret = 1;
230 BIO *next;
231
232 bs = BIO_get_data(b);
233 next = BIO_next(b);
234 ssl = bs->ssl;
235 if ((ssl == NULL) && (cmd != BIO_C_SET_SSL))
236 return 0;
237 switch (cmd) {
238 case BIO_CTRL_RESET:
239 SSL_shutdown(ssl);
240
241 if (ssl->handshake_func == ssl->method->ssl_connect)
242 SSL_set_connect_state(ssl);
243 else if (ssl->handshake_func == ssl->method->ssl_accept)
244 SSL_set_accept_state(ssl);
245
246 if (!SSL_clear(ssl)) {
247 ret = 0;
248 break;
249 }
250
251 if (next != NULL)
252 ret = BIO_ctrl(next, cmd, num, ptr);
253 else if (ssl->rbio != NULL)
254 ret = BIO_ctrl(ssl->rbio, cmd, num, ptr);
255 else
256 ret = 1;
257 break;
258 case BIO_CTRL_INFO:
259 ret = 0;
260 break;
261 case BIO_C_SSL_MODE:
262 if (num) /* client mode */
263 SSL_set_connect_state(ssl);
264 else
265 SSL_set_accept_state(ssl);
266 break;
267 case BIO_C_SET_SSL_RENEGOTIATE_TIMEOUT:
268 ret = bs->renegotiate_timeout;
269 if (num < 60)
270 num = 5;
271 bs->renegotiate_timeout = (unsigned long)num;
272 bs->last_time = (unsigned long)time(NULL);
273 break;
274 case BIO_C_SET_SSL_RENEGOTIATE_BYTES:
275 ret = bs->renegotiate_count;
276 if ((long)num >= 512)
277 bs->renegotiate_count = (unsigned long)num;
278 break;
279 case BIO_C_GET_SSL_NUM_RENEGOTIATES:
280 ret = bs->num_renegotiates;
281 break;
282 case BIO_C_SET_SSL:
283 if (ssl != NULL) {
284 ssl_free(b);
285 if (!ssl_new(b))
286 return 0;
287 bs = BIO_get_data(b);
288 }
289 BIO_set_shutdown(b, num);
290 ssl = (SSL *)ptr;
291 bs->ssl = ssl;
292 bio = SSL_get_rbio(ssl);
293 if (bio != NULL) {
294 if (next != NULL)
295 BIO_push(bio, next);
296 BIO_set_next(b, bio);
297 BIO_up_ref(bio);
298 }
299 BIO_set_init(b, 1);
300 break;
301 case BIO_C_GET_SSL:
302 if (ptr != NULL) {
303 sslp = (SSL **)ptr;
304 *sslp = ssl;
305 } else
306 ret = 0;
307 break;
308 case BIO_CTRL_GET_CLOSE:
309 ret = BIO_get_shutdown(b);
310 break;
311 case BIO_CTRL_SET_CLOSE:
312 BIO_set_shutdown(b, (int)num);
313 break;
314 case BIO_CTRL_WPENDING:
315 ret = BIO_ctrl(ssl->wbio, cmd, num, ptr);
316 break;
317 case BIO_CTRL_PENDING:
318 ret = SSL_pending(ssl);
319 if (ret == 0)
320 ret = BIO_pending(ssl->rbio);
321 break;
322 case BIO_CTRL_FLUSH:
323 BIO_clear_retry_flags(b);
324 ret = BIO_ctrl(ssl->wbio, cmd, num, ptr);
325 BIO_copy_next_retry(b);
326 break;
327 case BIO_CTRL_PUSH:
328 if ((next != NULL) && (next != ssl->rbio)) {
329 /*
330 * We are going to pass ownership of next to the SSL object...but
331 * we don't own a reference to pass yet - so up ref
332 */
333 BIO_up_ref(next);
334 SSL_set_bio(ssl, next, next);
335 }
336 break;
337 case BIO_CTRL_POP:
338 /* Only detach if we are the BIO explicitly being popped */
339 if (b == ptr) {
340 /* This will clear the reference we obtained during push */
341 SSL_set_bio(ssl, NULL, NULL);
342 }
343 break;
344 case BIO_C_DO_STATE_MACHINE:
345 BIO_clear_retry_flags(b);
346
347 BIO_set_retry_reason(b, 0);
348 ret = (int)SSL_do_handshake(ssl);
349
350 switch (SSL_get_error(ssl, (int)ret)) {
351 case SSL_ERROR_WANT_READ:
352 BIO_set_flags(b, BIO_FLAGS_READ | BIO_FLAGS_SHOULD_RETRY);
353 break;
354 case SSL_ERROR_WANT_WRITE:
355 BIO_set_flags(b, BIO_FLAGS_WRITE | BIO_FLAGS_SHOULD_RETRY);
356 break;
357 case SSL_ERROR_WANT_CONNECT:
358 BIO_set_flags(b, BIO_FLAGS_IO_SPECIAL | BIO_FLAGS_SHOULD_RETRY);
359 BIO_set_retry_reason(b, BIO_get_retry_reason(next));
360 break;
361 case SSL_ERROR_WANT_X509_LOOKUP:
362 BIO_set_retry_special(b);
363 BIO_set_retry_reason(b, BIO_RR_SSL_X509_LOOKUP);
364 break;
365 default:
366 break;
367 }
368 break;
369 case BIO_CTRL_DUP:
370 dbio = (BIO *)ptr;
371 dbs = BIO_get_data(dbio);
372 SSL_free(dbs->ssl);
373 dbs->ssl = SSL_dup(ssl);
374 dbs->num_renegotiates = bs->num_renegotiates;
375 dbs->renegotiate_count = bs->renegotiate_count;
376 dbs->byte_count = bs->byte_count;
377 dbs->renegotiate_timeout = bs->renegotiate_timeout;
378 dbs->last_time = bs->last_time;
379 ret = (dbs->ssl != NULL);
380 break;
381 case BIO_C_GET_FD:
382 ret = BIO_ctrl(ssl->rbio, cmd, num, ptr);
383 break;
384 case BIO_CTRL_SET_CALLBACK:
385 ret = 0; /* use callback ctrl */
386 break;
387 default:
388 ret = BIO_ctrl(ssl->rbio, cmd, num, ptr);
389 break;
390 }
391 return ret;
392}
393
394static long ssl_callback_ctrl(BIO *b, int cmd, BIO_info_cb *fp)
395{
396 SSL *ssl;
397 BIO_SSL *bs;
398 long ret = 1;
399
400 bs = BIO_get_data(b);
401 ssl = bs->ssl;
402 switch (cmd) {
403 case BIO_CTRL_SET_CALLBACK:
404 ret = BIO_callback_ctrl(ssl->rbio, cmd, fp);
405 break;
406 default:
407 ret = 0;
408 break;
409 }
410 return ret;
411}
412
413static int ssl_puts(BIO *bp, const char *str)
414{
415 int n, ret;
416
417 n = strlen(str);
418 ret = BIO_write(bp, str, n);
419 return ret;
420}
421
422BIO *BIO_new_buffer_ssl_connect(SSL_CTX *ctx)
423{
424#ifndef OPENSSL_NO_SOCK
425 BIO *ret = NULL, *buf = NULL, *ssl = NULL;
426
427 if ((buf = BIO_new(BIO_f_buffer())) == NULL)
428 return NULL;
429 if ((ssl = BIO_new_ssl_connect(ctx)) == NULL)
430 goto err;
431 if ((ret = BIO_push(buf, ssl)) == NULL)
432 goto err;
433 return ret;
434 err:
435 BIO_free(buf);
436 BIO_free(ssl);
437#endif
438 return NULL;
439}
440
441BIO *BIO_new_ssl_connect(SSL_CTX *ctx)
442{
443#ifndef OPENSSL_NO_SOCK
444 BIO *ret = NULL, *con = NULL, *ssl = NULL;
445
446 if ((con = BIO_new(BIO_s_connect())) == NULL)
447 return NULL;
448 if ((ssl = BIO_new_ssl(ctx, 1)) == NULL)
449 goto err;
450 if ((ret = BIO_push(ssl, con)) == NULL)
451 goto err;
452 return ret;
453 err:
454 BIO_free(con);
455#endif
456 return NULL;
457}
458
459BIO *BIO_new_ssl(SSL_CTX *ctx, int client)
460{
461 BIO *ret;
462 SSL *ssl;
463
464 if ((ret = BIO_new(BIO_f_ssl())) == NULL)
465 return NULL;
466 if ((ssl = SSL_new(ctx)) == NULL) {
467 BIO_free(ret);
468 return NULL;
469 }
470 if (client)
471 SSL_set_connect_state(ssl);
472 else
473 SSL_set_accept_state(ssl);
474
475 BIO_set_ssl(ret, ssl, BIO_CLOSE);
476 return ret;
477}
478
479int BIO_ssl_copy_session_id(BIO *t, BIO *f)
480{
481 BIO_SSL *tdata, *fdata;
482 t = BIO_find_type(t, BIO_TYPE_SSL);
483 f = BIO_find_type(f, BIO_TYPE_SSL);
484 if ((t == NULL) || (f == NULL))
485 return 0;
486 tdata = BIO_get_data(t);
487 fdata = BIO_get_data(f);
488 if ((tdata->ssl == NULL) || (fdata->ssl == NULL))
489 return 0;
490 if (!SSL_copy_session_id(tdata->ssl, (fdata->ssl)))
491 return 0;
492 return 1;
493}
494
495void BIO_ssl_shutdown(BIO *b)
496{
497 BIO_SSL *bdata;
498
499 for (; b != NULL; b = BIO_next(b)) {
500 if (BIO_method_type(b) != BIO_TYPE_SSL)
501 continue;
502 bdata = BIO_get_data(b);
503 if (bdata != NULL && bdata->ssl != NULL)
504 SSL_shutdown(bdata->ssl);
505 }
506}
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