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source: vbox/trunk/src/libs/openssl-3.1.3/ssl/bio_ssl.c@ 102797

Last change on this file since 102797 was 101211, checked in by vboxsync, 15 months ago

openssl-3.1.3: Applied and adjusted our OpenSSL changes to 3.1.2. bugref:10527
File size: 12.8 KB
Line 
1/*
2 * Copyright 1995-2021 The OpenSSL Project Authors. All Rights Reserved.
3 *
4 * Licensed under the Apache License 2.0 (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 ERR_raise(ERR_LIB_BIO, 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 (BIO_get_shutdown(a)) {
80 if (bs->ssl != NULL)
81 SSL_shutdown(bs->ssl);
82 if (BIO_get_init(a))
83 SSL_free(bs->ssl);
84 BIO_clear_flags(a, ~0); /* Clear all flags */
85 BIO_set_init(a, 0);
86 }
87 OPENSSL_free(bs);
88 return 1;
89}
90
91static int ssl_read(BIO *b, char *buf, size_t size, size_t *readbytes)
92{
93 int ret = 1;
94 BIO_SSL *sb;
95 SSL *ssl;
96 int retry_reason = 0;
97 int r = 0;
98
99 if (buf == NULL)
100 return 0;
101 sb = BIO_get_data(b);
102 ssl = sb->ssl;
103
104 BIO_clear_retry_flags(b);
105
106 ret = ssl_read_internal(ssl, buf, size, readbytes);
107
108 switch (SSL_get_error(ssl, ret)) {
109 case SSL_ERROR_NONE:
110 if (sb->renegotiate_count > 0) {
111 sb->byte_count += *readbytes;
112 if (sb->byte_count > sb->renegotiate_count) {
113 sb->byte_count = 0;
114 sb->num_renegotiates++;
115 SSL_renegotiate(ssl);
116 r = 1;
117 }
118 }
119 if ((sb->renegotiate_timeout > 0) && (!r)) {
120 unsigned long tm;
121
122 tm = (unsigned long)time(NULL);
123 if (tm > sb->last_time + sb->renegotiate_timeout) {
124 sb->last_time = tm;
125 sb->num_renegotiates++;
126 SSL_renegotiate(ssl);
127 }
128 }
129
130 break;
131 case SSL_ERROR_WANT_READ:
132 BIO_set_retry_read(b);
133 break;
134 case SSL_ERROR_WANT_WRITE:
135 BIO_set_retry_write(b);
136 break;
137 case SSL_ERROR_WANT_X509_LOOKUP:
138 BIO_set_retry_special(b);
139 retry_reason = BIO_RR_SSL_X509_LOOKUP;
140 break;
141 case SSL_ERROR_WANT_ACCEPT:
142 BIO_set_retry_special(b);
143 retry_reason = BIO_RR_ACCEPT;
144 break;
145 case SSL_ERROR_WANT_CONNECT:
146 BIO_set_retry_special(b);
147 retry_reason = BIO_RR_CONNECT;
148 break;
149 case SSL_ERROR_SYSCALL:
150 case SSL_ERROR_SSL:
151 case SSL_ERROR_ZERO_RETURN:
152 default:
153 break;
154 }
155
156 BIO_set_retry_reason(b, retry_reason);
157
158 return ret;
159}
160
161static int ssl_write(BIO *b, const char *buf, size_t size, size_t *written)
162{
163 int ret, r = 0;
164 int retry_reason = 0;
165 SSL *ssl;
166 BIO_SSL *bs;
167
168 if (buf == NULL)
169 return 0;
170 bs = BIO_get_data(b);
171 ssl = bs->ssl;
172
173 BIO_clear_retry_flags(b);
174
175 ret = ssl_write_internal(ssl, buf, size, written);
176
177 switch (SSL_get_error(ssl, ret)) {
178 case SSL_ERROR_NONE:
179 if (bs->renegotiate_count > 0) {
180 bs->byte_count += *written;
181 if (bs->byte_count > bs->renegotiate_count) {
182 bs->byte_count = 0;
183 bs->num_renegotiates++;
184 SSL_renegotiate(ssl);
185 r = 1;
186 }
187 }
188 if ((bs->renegotiate_timeout > 0) && (!r)) {
189 unsigned long tm;
190
191 tm = (unsigned long)time(NULL);
192 if (tm > bs->last_time + bs->renegotiate_timeout) {
193 bs->last_time = tm;
194 bs->num_renegotiates++;
195 SSL_renegotiate(ssl);
196 }
197 }
198 break;
199 case SSL_ERROR_WANT_WRITE:
200 BIO_set_retry_write(b);
201 break;
202 case SSL_ERROR_WANT_READ:
203 BIO_set_retry_read(b);
204 break;
205 case SSL_ERROR_WANT_X509_LOOKUP:
206 BIO_set_retry_special(b);
207 retry_reason = BIO_RR_SSL_X509_LOOKUP;
208 break;
209 case SSL_ERROR_WANT_CONNECT:
210 BIO_set_retry_special(b);
211 retry_reason = BIO_RR_CONNECT;
212 case SSL_ERROR_SYSCALL:
213 case SSL_ERROR_SSL:
214 default:
215 break;
216 }
217
218 BIO_set_retry_reason(b, retry_reason);
219
220 return ret;
221}
222
223static long ssl_ctrl(BIO *b, int cmd, long num, void *ptr)
224{
225 SSL **sslp, *ssl;
226 BIO_SSL *bs, *dbs;
227 BIO *dbio, *bio;
228 long ret = 1;
229 BIO *next;
230
231 bs = BIO_get_data(b);
232 next = BIO_next(b);
233 ssl = bs->ssl;
234 if ((ssl == NULL) && (cmd != BIO_C_SET_SSL))
235 return 0;
236 switch (cmd) {
237 case BIO_CTRL_RESET:
238 SSL_shutdown(ssl);
239
240 if (ssl->handshake_func == ssl->method->ssl_connect)
241 SSL_set_connect_state(ssl);
242 else if (ssl->handshake_func == ssl->method->ssl_accept)
243 SSL_set_accept_state(ssl);
244
245 if (!SSL_clear(ssl)) {
246 ret = 0;
247 break;
248 }
249
250 if (next != NULL)
251 ret = BIO_ctrl(next, cmd, num, ptr);
252 else if (ssl->rbio != NULL)
253 ret = BIO_ctrl(ssl->rbio, cmd, num, ptr);
254 else
255 ret = 1;
256 break;
257 case BIO_CTRL_INFO:
258 ret = 0;
259 break;
260 case BIO_C_SSL_MODE:
261 if (num) /* client mode */
262 SSL_set_connect_state(ssl);
263 else
264 SSL_set_accept_state(ssl);
265 break;
266 case BIO_C_SET_SSL_RENEGOTIATE_TIMEOUT:
267 ret = bs->renegotiate_timeout;
268 if (num < 60)
269 num = 5;
270 bs->renegotiate_timeout = (unsigned long)num;
271 bs->last_time = (unsigned long)time(NULL);
272 break;
273 case BIO_C_SET_SSL_RENEGOTIATE_BYTES:
274 ret = bs->renegotiate_count;
275 if ((long)num >= 512)
276 bs->renegotiate_count = (unsigned long)num;
277 break;
278 case BIO_C_GET_SSL_NUM_RENEGOTIATES:
279 ret = bs->num_renegotiates;
280 break;
281 case BIO_C_SET_SSL:
282 if (ssl != NULL) {
283 ssl_free(b);
284 if (!ssl_new(b))
285 return 0;
286 bs = BIO_get_data(b);
287 }
288 BIO_set_shutdown(b, num);
289 ssl = (SSL *)ptr;
290 bs->ssl = ssl;
291 bio = SSL_get_rbio(ssl);
292 if (bio != NULL) {
293 if (next != NULL)
294 BIO_push(bio, next);
295 BIO_set_next(b, bio);
296 BIO_up_ref(bio);
297 }
298 BIO_set_init(b, 1);
299 break;
300 case BIO_C_GET_SSL:
301 if (ptr != NULL) {
302 sslp = (SSL **)ptr;
303 *sslp = ssl;
304 } else
305 ret = 0;
306 break;
307 case BIO_CTRL_GET_CLOSE:
308 ret = BIO_get_shutdown(b);
309 break;
310 case BIO_CTRL_SET_CLOSE:
311 BIO_set_shutdown(b, (int)num);
312 break;
313 case BIO_CTRL_WPENDING:
314 ret = BIO_ctrl(ssl->wbio, cmd, num, ptr);
315 break;
316 case BIO_CTRL_PENDING:
317 ret = SSL_pending(ssl);
318 if (ret == 0)
319 ret = BIO_pending(ssl->rbio);
320 break;
321 case BIO_CTRL_FLUSH:
322 BIO_clear_retry_flags(b);
323 ret = BIO_ctrl(ssl->wbio, cmd, num, ptr);
324 BIO_copy_next_retry(b);
325 break;
326 case BIO_CTRL_PUSH:
327 if ((next != NULL) && (next != ssl->rbio)) {
328 /*
329 * We are going to pass ownership of next to the SSL object...but
330 * we don't own a reference to pass yet - so up ref
331 */
332 BIO_up_ref(next);
333 SSL_set_bio(ssl, next, next);
334 }
335 break;
336 case BIO_CTRL_POP:
337 /* Only detach if we are the BIO explicitly being popped */
338 if (b == ptr) {
339 /* This will clear the reference we obtained during push */
340 SSL_set_bio(ssl, NULL, NULL);
341 }
342 break;
343 case BIO_C_DO_STATE_MACHINE:
344 BIO_clear_retry_flags(b);
345
346 BIO_set_retry_reason(b, 0);
347 ret = (int)SSL_do_handshake(ssl);
348
349 switch (SSL_get_error(ssl, (int)ret)) {
350 case SSL_ERROR_WANT_READ:
351 BIO_set_flags(b, BIO_FLAGS_READ | BIO_FLAGS_SHOULD_RETRY);
352 break;
353 case SSL_ERROR_WANT_WRITE:
354 BIO_set_flags(b, BIO_FLAGS_WRITE | BIO_FLAGS_SHOULD_RETRY);
355 break;
356 case SSL_ERROR_WANT_CONNECT:
357 BIO_set_flags(b, BIO_FLAGS_IO_SPECIAL | BIO_FLAGS_SHOULD_RETRY);
358 BIO_set_retry_reason(b, BIO_get_retry_reason(next));
359 break;
360 case SSL_ERROR_WANT_X509_LOOKUP:
361 BIO_set_retry_special(b);
362 BIO_set_retry_reason(b, BIO_RR_SSL_X509_LOOKUP);
363 break;
364 default:
365 break;
366 }
367 break;
368 case BIO_CTRL_DUP:
369 dbio = (BIO *)ptr;
370 dbs = BIO_get_data(dbio);
371 SSL_free(dbs->ssl);
372 dbs->ssl = SSL_dup(ssl);
373 dbs->num_renegotiates = bs->num_renegotiates;
374 dbs->renegotiate_count = bs->renegotiate_count;
375 dbs->byte_count = bs->byte_count;
376 dbs->renegotiate_timeout = bs->renegotiate_timeout;
377 dbs->last_time = bs->last_time;
378 ret = (dbs->ssl != NULL);
379 break;
380 case BIO_C_GET_FD:
381 ret = BIO_ctrl(ssl->rbio, cmd, num, ptr);
382 break;
383 case BIO_CTRL_SET_CALLBACK:
384 ret = 0; /* use callback ctrl */
385 break;
386 default:
387 ret = BIO_ctrl(ssl->rbio, cmd, num, ptr);
388 break;
389 }
390 return ret;
391}
392
393static long ssl_callback_ctrl(BIO *b, int cmd, BIO_info_cb *fp)
394{
395 SSL *ssl;
396 BIO_SSL *bs;
397 long ret = 1;
398
399 bs = BIO_get_data(b);
400 ssl = bs->ssl;
401 switch (cmd) {
402 case BIO_CTRL_SET_CALLBACK:
403 ret = BIO_callback_ctrl(ssl->rbio, cmd, fp);
404 break;
405 default:
406 ret = 0;
407 break;
408 }
409 return ret;
410}
411
412static int ssl_puts(BIO *bp, const char *str)
413{
414 int n, ret;
415
416 n = strlen(str);
417 ret = BIO_write(bp, str, n);
418 return ret;
419}
420
421BIO *BIO_new_buffer_ssl_connect(SSL_CTX *ctx)
422{
423#ifndef OPENSSL_NO_SOCK
424 BIO *ret = NULL, *buf = NULL, *ssl = NULL;
425
426 if ((buf = BIO_new(BIO_f_buffer())) == NULL)
427 return NULL;
428 if ((ssl = BIO_new_ssl_connect(ctx)) == NULL)
429 goto err;
430 if ((ret = BIO_push(buf, ssl)) == NULL)
431 goto err;
432 return ret;
433 err:
434 BIO_free(buf);
435 BIO_free(ssl);
436#endif
437 return NULL;
438}
439
440BIO *BIO_new_ssl_connect(SSL_CTX *ctx)
441{
442#ifndef OPENSSL_NO_SOCK
443 BIO *ret = NULL, *con = NULL, *ssl = NULL;
444
445 if ((con = BIO_new(BIO_s_connect())) == NULL)
446 return NULL;
447 if ((ssl = BIO_new_ssl(ctx, 1)) == NULL)
448 goto err;
449 if ((ret = BIO_push(ssl, con)) == NULL)
450 goto err;
451 return ret;
452 err:
453 BIO_free(ssl);
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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