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-rw-r--r--src/lib/libssl/bio_ssl.c555
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diff --git a/src/lib/libssl/bio_ssl.c b/src/lib/libssl/bio_ssl.c
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index f62cde4e5d..0000000000
--- a/src/lib/libssl/bio_ssl.c
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1/* ssl/bio_ssl.c */
2/* Copyright (C) 1995-1998 Eric Young (eay@cryptsoft.com)
3 * All rights reserved.
4 *
5 * This package is an SSL implementation written
6 * by Eric Young (eay@cryptsoft.com).
7 * The implementation was written so as to conform with Netscapes SSL.
8 *
9 * This library is free for commercial and non-commercial use as long as
10 * the following conditions are aheared to. The following conditions
11 * apply to all code found in this distribution, be it the RC4, RSA,
12 * lhash, DES, etc., code; not just the SSL code. The SSL documentation
13 * included with this distribution is covered by the same copyright terms
14 * except that the holder is Tim Hudson (tjh@cryptsoft.com).
15 *
16 * Copyright remains Eric Young's, and as such any Copyright notices in
17 * the code are not to be removed.
18 * If this package is used in a product, Eric Young should be given attribution
19 * as the author of the parts of the library used.
20 * This can be in the form of a textual message at program startup or
21 * in documentation (online or textual) provided with the package.
22 *
23 * Redistribution and use in source and binary forms, with or without
24 * modification, are permitted provided that the following conditions
25 * are met:
26 * 1. Redistributions of source code must retain the copyright
27 * notice, this list of conditions and the following disclaimer.
28 * 2. Redistributions in binary form must reproduce the above copyright
29 * notice, this list of conditions and the following disclaimer in the
30 * documentation and/or other materials provided with the distribution.
31 * 3. All advertising materials mentioning features or use of this software
32 * must display the following acknowledgement:
33 * "This product includes cryptographic software written by
34 * Eric Young (eay@cryptsoft.com)"
35 * The word 'cryptographic' can be left out if the rouines from the library
36 * being used are not cryptographic related :-).
37 * 4. If you include any Windows specific code (or a derivative thereof) from
38 * the apps directory (application code) you must include an acknowledgement:
39 * "This product includes software written by Tim Hudson (tjh@cryptsoft.com)"
40 *
41 * THIS SOFTWARE IS PROVIDED BY ERIC YOUNG ``AS IS'' AND
42 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
43 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
44 * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
45 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
46 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
47 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
48 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
49 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
50 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
51 * SUCH DAMAGE.
52 *
53 * The licence and distribution terms for any publically available version or
54 * derivative of this code cannot be changed. i.e. this code cannot simply be
55 * copied and put under another distribution licence
56 * [including the GNU Public Licence.]
57 */
58
59#include <stdio.h>
60#include <stdlib.h>
61#include <string.h>
62#include <errno.h>
63#include <openssl/crypto.h>
64#include <openssl/bio.h>
65#include <openssl/err.h>
66#include <openssl/ssl.h>
67
68static int ssl_write(BIO *h,char *buf,int num);
69static int ssl_read(BIO *h,char *buf,int size);
70static int ssl_puts(BIO *h,char *str);
71static long ssl_ctrl(BIO *h,int cmd,long arg1,char *arg2);
72static int ssl_new(BIO *h);
73static int ssl_free(BIO *data);
74typedef struct bio_ssl_st
75 {
76 SSL *ssl; /* The ssl handle :-) */
77 /* re-negotiate every time the total number of bytes is this size */
78 int num_renegotiates;
79 unsigned long renegotiate_count;
80 unsigned long byte_count;
81 unsigned long renegotiate_timeout;
82 unsigned long last_time;
83 } BIO_SSL;
84
85static BIO_METHOD methods_sslp=
86 {
87 BIO_TYPE_SSL,"ssl",
88 ssl_write,
89 ssl_read,
90 ssl_puts,
91 NULL, /* ssl_gets, */
92 ssl_ctrl,
93 ssl_new,
94 ssl_free,
95 };
96
97BIO_METHOD *BIO_f_ssl(void)
98 {
99 return(&methods_sslp);
100 }
101
102static int ssl_new(BIO *bi)
103 {
104 BIO_SSL *bs;
105
106 bs=(BIO_SSL *)Malloc(sizeof(BIO_SSL));
107 if (bs == NULL)
108 {
109 BIOerr(BIO_F_SSL_NEW,ERR_R_MALLOC_FAILURE);
110 return(0);
111 }
112 memset(bs,0,sizeof(BIO_SSL));
113 bi->init=0;
114 bi->ptr=(char *)bs;
115 bi->flags=0;
116 return(1);
117 }
118
119static int ssl_free(BIO *a)
120 {
121 BIO_SSL *bs;
122
123 if (a == NULL) return(0);
124 bs=(BIO_SSL *)a->ptr;
125 if (bs->ssl != NULL) SSL_shutdown(bs->ssl);
126 if (a->shutdown)
127 {
128 if (a->init && (bs->ssl != NULL))
129 SSL_free(bs->ssl);
130 a->init=0;
131 a->flags=0;
132 }
133 if (a->ptr != NULL)
134 Free(a->ptr);
135 return(1);
136 }
137
138static int ssl_read(BIO *b, char *out, int outl)
139 {
140 int ret=1;
141 BIO_SSL *sb;
142 SSL *ssl;
143 int retry_reason=0;
144 int r=0;
145
146 if (out == NULL) return(0);
147 sb=(BIO_SSL *)b->ptr;
148 ssl=sb->ssl;
149
150 BIO_clear_retry_flags(b);
151
152#if 0
153 if (!SSL_is_init_finished(ssl))
154 {
155/* ret=SSL_do_handshake(ssl); */
156 if (ret > 0)
157 {
158
159 outflags=(BIO_FLAGS_READ|BIO_FLAGS_SHOULD_RETRY);
160 ret= -1;
161 goto end;
162 }
163 }
164#endif
165/* if (ret > 0) */
166 ret=SSL_read(ssl,out,outl);
167
168 switch (SSL_get_error(ssl,ret))
169 {
170 case SSL_ERROR_NONE:
171 if (ret <= 0) break;
172 if (sb->renegotiate_count > 0)
173 {
174 sb->byte_count+=ret;
175 if (sb->byte_count > sb->renegotiate_count)
176 {
177 sb->byte_count=0;
178 sb->num_renegotiates++;
179 SSL_renegotiate(ssl);
180 r=1;
181 }
182 }
183 if ((sb->renegotiate_timeout > 0) && (!r))
184 {
185 unsigned long tm;
186
187 tm=(unsigned long)time(NULL);
188 if (tm > sb->last_time+sb->renegotiate_timeout)
189 {
190 sb->last_time=tm;
191 sb->num_renegotiates++;
192 SSL_renegotiate(ssl);
193 }
194 }
195
196 break;
197 case SSL_ERROR_WANT_READ:
198 BIO_set_retry_read(b);
199 break;
200 case SSL_ERROR_WANT_WRITE:
201 BIO_set_retry_write(b);
202 break;
203 case SSL_ERROR_WANT_X509_LOOKUP:
204 BIO_set_retry_special(b);
205 retry_reason=BIO_RR_SSL_X509_LOOKUP;
206 break;
207 case SSL_ERROR_WANT_CONNECT:
208 BIO_set_retry_special(b);
209 retry_reason=BIO_RR_CONNECT;
210 break;
211 case SSL_ERROR_SYSCALL:
212 case SSL_ERROR_SSL:
213 case SSL_ERROR_ZERO_RETURN:
214 default:
215 break;
216 }
217
218 b->retry_reason=retry_reason;
219 return(ret);
220 }
221
222static int ssl_write(BIO *b, char *out, int outl)
223 {
224 int ret,r=0;
225 int retry_reason=0;
226 SSL *ssl;
227 BIO_SSL *bs;
228
229 if (out == NULL) return(0);
230 bs=(BIO_SSL *)b->ptr;
231 ssl=bs->ssl;
232
233 BIO_clear_retry_flags(b);
234
235/* ret=SSL_do_handshake(ssl);
236 if (ret > 0) */
237 ret=SSL_write(ssl,out,outl);
238
239 switch (SSL_get_error(ssl,ret))
240 {
241 case SSL_ERROR_NONE:
242 if (ret <= 0) break;
243 if (bs->renegotiate_count > 0)
244 {
245 bs->byte_count+=ret;
246 if (bs->byte_count > bs->renegotiate_count)
247 {
248 bs->byte_count=0;
249 bs->num_renegotiates++;
250 SSL_renegotiate(ssl);
251 r=1;
252 }
253 }
254 if ((bs->renegotiate_timeout > 0) && (!r))
255 {
256 unsigned long tm;
257
258 tm=(unsigned long)time(NULL);
259 if (tm > bs->last_time+bs->renegotiate_timeout)
260 {
261 bs->last_time=tm;
262 bs->num_renegotiates++;
263 SSL_renegotiate(ssl);
264 }
265 }
266 break;
267 case SSL_ERROR_WANT_WRITE:
268 BIO_set_retry_write(b);
269 break;
270 case SSL_ERROR_WANT_READ:
271 BIO_set_retry_read(b);
272 break;
273 case SSL_ERROR_WANT_X509_LOOKUP:
274 BIO_set_retry_special(b);
275 retry_reason=BIO_RR_SSL_X509_LOOKUP;
276 break;
277 case SSL_ERROR_WANT_CONNECT:
278 BIO_set_retry_special(b);
279 retry_reason=BIO_RR_CONNECT;
280 case SSL_ERROR_SYSCALL:
281 case SSL_ERROR_SSL:
282 default:
283 break;
284 }
285
286 b->retry_reason=retry_reason;
287 return(ret);
288 }
289
290static long ssl_ctrl(BIO *b, int cmd, long num, char *ptr)
291 {
292 SSL **sslp,*ssl;
293 BIO_SSL *bs;
294 BIO *dbio,*bio;
295 long ret=1;
296
297 bs=(BIO_SSL *)b->ptr;
298 ssl=bs->ssl;
299 if ((ssl == NULL) && (cmd != BIO_C_SET_SSL))
300 return(0);
301 switch (cmd)
302 {
303 case BIO_CTRL_RESET:
304 SSL_shutdown(ssl);
305
306 if (ssl->handshake_func == ssl->method->ssl_connect)
307 SSL_set_connect_state(ssl);
308 else if (ssl->handshake_func == ssl->method->ssl_accept)
309 SSL_set_accept_state(ssl);
310
311 SSL_clear(ssl);
312
313 if (b->next_bio != NULL)
314 ret=BIO_ctrl(b->next_bio,cmd,num,ptr);
315 else if (ssl->rbio != NULL)
316 ret=BIO_ctrl(ssl->rbio,cmd,num,ptr);
317 else
318 ret=1;
319 break;
320 case BIO_CTRL_INFO:
321 ret=0;
322 break;
323 case BIO_C_SSL_MODE:
324 if (num) /* client mode */
325 SSL_set_connect_state(ssl);
326 else
327 SSL_set_accept_state(ssl);
328 break;
329 case BIO_C_SET_SSL_RENEGOTIATE_TIMEOUT:
330 ret=bs->renegotiate_timeout;
331 if (num < 60) num=5;
332 bs->renegotiate_timeout=(unsigned long)num;
333 bs->last_time=(unsigned long)time(NULL);
334 break;
335 case BIO_C_SET_SSL_RENEGOTIATE_BYTES:
336 ret=bs->renegotiate_count;
337 if ((long)num >=512)
338 bs->renegotiate_count=(unsigned long)num;
339 break;
340 case BIO_C_GET_SSL_NUM_RENEGOTIATES:
341 ret=bs->num_renegotiates;
342 break;
343 case BIO_C_SET_SSL:
344 if (ssl != NULL)
345 ssl_free(b);
346 b->shutdown=(int)num;
347 ssl=(SSL *)ptr;
348 ((BIO_SSL *)b->ptr)->ssl=ssl;
349 bio=SSL_get_rbio(ssl);
350 if (bio != NULL)
351 {
352 if (b->next_bio != NULL)
353 BIO_push(bio,b->next_bio);
354 b->next_bio=bio;
355 CRYPTO_add(&bio->references,1,CRYPTO_LOCK_BIO);
356 }
357 b->init=1;
358 break;
359 case BIO_C_GET_SSL:
360 if (ptr != NULL)
361 {
362 sslp=(SSL **)ptr;
363 *sslp=ssl;
364 }
365 else
366 ret=0;
367 break;
368 case BIO_CTRL_GET_CLOSE:
369 ret=b->shutdown;
370 break;
371 case BIO_CTRL_SET_CLOSE:
372 b->shutdown=(int)num;
373 break;
374 case BIO_CTRL_WPENDING:
375 ret=BIO_ctrl(ssl->wbio,cmd,num,ptr);
376 break;
377 case BIO_CTRL_PENDING:
378 ret=SSL_pending(ssl);
379 if (ret == 0)
380 ret=BIO_pending(ssl->rbio);
381 break;
382 case BIO_CTRL_FLUSH:
383 BIO_clear_retry_flags(b);
384 ret=BIO_ctrl(ssl->wbio,cmd,num,ptr);
385 BIO_copy_next_retry(b);
386 break;
387 case BIO_CTRL_PUSH:
388 if ((b->next_bio != NULL) && (b->next_bio != ssl->rbio))
389 {
390 SSL_set_bio(ssl,b->next_bio,b->next_bio);
391 CRYPTO_add(&b->next_bio->references,1,CRYPTO_LOCK_BIO);
392 }
393 break;
394 case BIO_CTRL_POP:
395 /* ugly bit of a hack */
396 if (ssl->rbio != ssl->wbio) /* we are in trouble :-( */
397 {
398 BIO_free_all(ssl->wbio);
399 }
400 ssl->wbio=NULL;
401 ssl->rbio=NULL;
402 break;
403 case BIO_C_DO_STATE_MACHINE:
404 BIO_clear_retry_flags(b);
405
406 b->retry_reason=0;
407 ret=(int)SSL_do_handshake(ssl);
408
409 switch (SSL_get_error(ssl,(int)ret))
410 {
411 case SSL_ERROR_WANT_READ:
412 BIO_set_flags(b,
413 BIO_FLAGS_READ|BIO_FLAGS_SHOULD_RETRY);
414 break;
415 case SSL_ERROR_WANT_WRITE:
416 BIO_set_flags(b,
417 BIO_FLAGS_WRITE|BIO_FLAGS_SHOULD_RETRY);
418 break;
419 case SSL_ERROR_WANT_CONNECT:
420 BIO_set_flags(b,
421 BIO_FLAGS_IO_SPECIAL|BIO_FLAGS_SHOULD_RETRY);
422 b->retry_reason=b->next_bio->retry_reason;
423 break;
424 default:
425 break;
426 }
427 break;
428 case BIO_CTRL_DUP:
429 dbio=(BIO *)ptr;
430 if (((BIO_SSL *)dbio->ptr)->ssl != NULL)
431 SSL_free(((BIO_SSL *)dbio->ptr)->ssl);
432 ((BIO_SSL *)dbio->ptr)->ssl=SSL_dup(ssl);
433 ((BIO_SSL *)dbio->ptr)->renegotiate_count=
434 ((BIO_SSL *)b->ptr)->renegotiate_count;
435 ((BIO_SSL *)dbio->ptr)->byte_count=
436 ((BIO_SSL *)b->ptr)->byte_count;
437 ((BIO_SSL *)dbio->ptr)->renegotiate_timeout=
438 ((BIO_SSL *)b->ptr)->renegotiate_timeout;
439 ((BIO_SSL *)dbio->ptr)->last_time=
440 ((BIO_SSL *)b->ptr)->last_time;
441 ret=(((BIO_SSL *)dbio->ptr)->ssl != NULL);
442 break;
443 case BIO_C_GET_FD:
444 ret=BIO_ctrl(ssl->rbio,cmd,num,ptr);
445 break;
446 case BIO_CTRL_SET_CALLBACK:
447 SSL_set_info_callback(ssl,(void (*)())ptr);
448 break;
449 case BIO_CTRL_GET_CALLBACK:
450 {
451 void (**fptr)();
452
453 fptr=(void (**)())ptr;
454 *fptr=SSL_get_info_callback(ssl);
455 }
456 break;
457 default:
458 ret=BIO_ctrl(ssl->rbio,cmd,num,ptr);
459 break;
460 }
461 return(ret);
462 }
463
464static int ssl_puts(BIO *bp, char *str)
465 {
466 int n,ret;
467
468 n=strlen(str);
469 ret=BIO_write(bp,str,n);
470 return(ret);
471 }
472
473BIO *BIO_new_buffer_ssl_connect(SSL_CTX *ctx)
474 {
475 BIO *ret=NULL,*buf=NULL,*ssl=NULL;
476
477 if ((buf=BIO_new(BIO_f_buffer())) == NULL)
478 return(NULL);
479 if ((ssl=BIO_new_ssl_connect(ctx)) == NULL)
480 goto err;
481 if ((ret=BIO_push(buf,ssl)) == NULL)
482 goto err;
483 return(ret);
484err:
485 if (buf != NULL) BIO_free(buf);
486 if (ssl != NULL) BIO_free(ssl);
487 return(NULL);
488 }
489
490BIO *BIO_new_ssl_connect(SSL_CTX *ctx)
491 {
492 BIO *ret=NULL,*con=NULL,*ssl=NULL;
493
494 if ((con=BIO_new(BIO_s_connect())) == NULL)
495 return(NULL);
496 if ((ssl=BIO_new_ssl(ctx,1)) == NULL)
497 goto err;
498 if ((ret=BIO_push(ssl,con)) == NULL)
499 goto err;
500 return(ret);
501err:
502 if (con != NULL) BIO_free(con);
503 if (ret != NULL) BIO_free(ret);
504 return(NULL);
505 }
506
507BIO *BIO_new_ssl(SSL_CTX *ctx, int client)
508 {
509 BIO *ret;
510 SSL *ssl;
511
512 if ((ret=BIO_new(BIO_f_ssl())) == NULL)
513 return(NULL);
514 if ((ssl=SSL_new(ctx)) == NULL)
515 {
516 BIO_free(ret);
517 return(NULL);
518 }
519 if (client)
520 SSL_set_connect_state(ssl);
521 else
522 SSL_set_accept_state(ssl);
523
524 BIO_set_ssl(ret,ssl,BIO_CLOSE);
525 return(ret);
526 }
527
528int BIO_ssl_copy_session_id(BIO *t, BIO *f)
529 {
530 t=BIO_find_type(t,BIO_TYPE_SSL);
531 f=BIO_find_type(f,BIO_TYPE_SSL);
532 if ((t == NULL) || (f == NULL))
533 return(0);
534 if ( (((BIO_SSL *)t->ptr)->ssl == NULL) ||
535 (((BIO_SSL *)f->ptr)->ssl == NULL))
536 return(0);
537 SSL_copy_session_id(((BIO_SSL *)t->ptr)->ssl,((BIO_SSL *)f->ptr)->ssl);
538 return(1);
539 }
540
541void BIO_ssl_shutdown(BIO *b)
542 {
543 SSL *s;
544
545 while (b != NULL)
546 {
547 if (b->method->type == BIO_TYPE_SSL)
548 {
549 s=((BIO_SSL *)b->ptr)->ssl;
550 SSL_shutdown(s);
551 break;
552 }
553 b=b->next_bio;
554 }
555 }
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