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-rw-r--r--src/lib/libssl/bio_ssl.c585
1 files changed, 585 insertions, 0 deletions
diff --git a/src/lib/libssl/bio_ssl.c b/src/lib/libssl/bio_ssl.c
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index 0000000000..58a6d69b9b
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+++ b/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 "crypto.h"
64#include "bio.h"
65#include "err.h"
66#include "ssl.h"
67
68#ifndef NOPROTO
69static int ssl_write(BIO *h,char *buf,int num);
70static int ssl_read(BIO *h,char *buf,int size);
71static int ssl_puts(BIO *h,char *str);
72static long ssl_ctrl(BIO *h,int cmd,long arg1,char *arg2);
73static int ssl_new(BIO *h);
74static int ssl_free(BIO *data);
75#else
76static int ssl_write();
77static int ssl_read();
78static int ssl_puts();
79static long ssl_ctrl();
80static int ssl_new();
81static int ssl_free();
82#endif
83
84typedef struct bio_ssl_st
85 {
86 SSL *ssl; /* The ssl handle :-) */
87 /* re-negotiate every time the total number of bytes is this size */
88 int num_renegotiates;
89 unsigned long renegotiate_count;
90 unsigned long byte_count;
91 unsigned long renegotiate_timeout;
92 unsigned long last_time;
93 } BIO_SSL;
94
95static BIO_METHOD methods_sslp=
96 {
97 BIO_TYPE_SSL,"ssl",
98 ssl_write,
99 ssl_read,
100 ssl_puts,
101 NULL, /* ssl_gets, */
102 ssl_ctrl,
103 ssl_new,
104 ssl_free,
105 };
106
107BIO_METHOD *BIO_f_ssl()
108 {
109 return(&methods_sslp);
110 }
111
112static int ssl_new(bi)
113BIO *bi;
114 {
115 BIO_SSL *bs;
116
117 bs=(BIO_SSL *)Malloc(sizeof(BIO_SSL));
118 if (bs == NULL)
119 {
120 BIOerr(BIO_F_SSL_NEW,ERR_R_MALLOC_FAILURE);
121 return(0);
122 }
123 memset(bs,0,sizeof(BIO_SSL));
124 bi->init=0;
125 bi->ptr=(char *)bs;
126 bi->flags=0;
127 return(1);
128 }
129
130static int ssl_free(a)
131BIO *a;
132 {
133 BIO_SSL *bs;
134
135 if (a == NULL) return(0);
136 bs=(BIO_SSL *)a->ptr;
137 if (bs->ssl != NULL) SSL_shutdown(bs->ssl);
138 if (a->shutdown)
139 {
140 if (a->init && (bs->ssl != NULL))
141 SSL_free(bs->ssl);
142 a->init=0;
143 a->flags=0;
144 }
145 if (a->ptr != NULL)
146 Free(a->ptr);
147 return(1);
148 }
149
150static int ssl_read(b,out,outl)
151BIO *b;
152char *out;
153int outl;
154 {
155 int ret=1;
156 BIO_SSL *sb;
157 SSL *ssl;
158 int retry_reason=0;
159 int r=0;
160
161 if (out == NULL) return(0);
162 sb=(BIO_SSL *)b->ptr;
163 ssl=sb->ssl;
164
165 BIO_clear_retry_flags(b);
166
167#if 0
168 if (!SSL_is_init_finished(ssl))
169 {
170/* ret=SSL_do_handshake(ssl); */
171 if (ret > 0)
172 {
173
174 outflags=(BIO_FLAGS_READ|BIO_FLAGS_SHOULD_RETRY);
175 ret= -1;
176 goto end;
177 }
178 }
179#endif
180/* if (ret > 0) */
181 ret=SSL_read(ssl,out,outl);
182
183 switch (SSL_get_error(ssl,ret))
184 {
185 case SSL_ERROR_NONE:
186 if (ret <= 0) break;
187 if (sb->renegotiate_count > 0)
188 {
189 sb->byte_count+=ret;
190 if (sb->byte_count > sb->renegotiate_count)
191 {
192 sb->byte_count=0;
193 sb->num_renegotiates++;
194 SSL_renegotiate(ssl);
195 r=1;
196 }
197 }
198 if ((sb->renegotiate_timeout > 0) && (!r))
199 {
200 unsigned long tm;
201
202 tm=(unsigned long)time(NULL);
203 if (tm > sb->last_time+sb->renegotiate_timeout)
204 {
205 sb->last_time=tm;
206 sb->num_renegotiates++;
207 SSL_renegotiate(ssl);
208 }
209 }
210
211 break;
212 case SSL_ERROR_WANT_READ:
213 BIO_set_retry_read(b);
214 break;
215 case SSL_ERROR_WANT_WRITE:
216 BIO_set_retry_write(b);
217 break;
218 case SSL_ERROR_WANT_X509_LOOKUP:
219 BIO_set_retry_special(b);
220 retry_reason=BIO_RR_SSL_X509_LOOKUP;
221 break;
222 case SSL_ERROR_WANT_CONNECT:
223 BIO_set_retry_special(b);
224 retry_reason=BIO_RR_CONNECT;
225 break;
226 case SSL_ERROR_SYSCALL:
227 case SSL_ERROR_SSL:
228 case SSL_ERROR_ZERO_RETURN:
229 default:
230 break;
231 }
232
233 b->retry_reason=retry_reason;
234 return(ret);
235 }
236
237static int ssl_write(b,out,outl)
238BIO *b;
239char *out;
240int outl;
241 {
242 int ret,r=0;
243 int retry_reason=0;
244 SSL *ssl;
245 BIO_SSL *bs;
246
247 if (out == NULL) return(0);
248 bs=(BIO_SSL *)b->ptr;
249 ssl=bs->ssl;
250
251 BIO_clear_retry_flags(b);
252
253/* ret=SSL_do_handshake(ssl);
254 if (ret > 0) */
255 ret=SSL_write(ssl,out,outl);
256
257 switch (SSL_get_error(ssl,ret))
258 {
259 case SSL_ERROR_NONE:
260 if (ret <= 0) break;
261 if (bs->renegotiate_count > 0)
262 {
263 bs->byte_count+=ret;
264 if (bs->byte_count > bs->renegotiate_count)
265 {
266 bs->byte_count=0;
267 bs->num_renegotiates++;
268 SSL_renegotiate(ssl);
269 r=1;
270 }
271 }
272 if ((bs->renegotiate_timeout > 0) && (!r))
273 {
274 unsigned long tm;
275
276 tm=(unsigned long)time(NULL);
277 if (tm > bs->last_time+bs->renegotiate_timeout)
278 {
279 bs->last_time=tm;
280 bs->num_renegotiates++;
281 SSL_renegotiate(ssl);
282 }
283 }
284 break;
285 case SSL_ERROR_WANT_WRITE:
286 BIO_set_retry_write(b);
287 break;
288 case SSL_ERROR_WANT_READ:
289 BIO_set_retry_read(b);
290 break;
291 case SSL_ERROR_WANT_X509_LOOKUP:
292 BIO_set_retry_special(b);
293 retry_reason=BIO_RR_SSL_X509_LOOKUP;
294 break;
295 case SSL_ERROR_WANT_CONNECT:
296 BIO_set_retry_special(b);
297 retry_reason=BIO_RR_CONNECT;
298 case SSL_ERROR_SYSCALL:
299 case SSL_ERROR_SSL:
300 default:
301 break;
302 }
303
304 b->retry_reason=retry_reason;
305 return(ret);
306 }
307
308static long ssl_ctrl(b,cmd,num,ptr)
309BIO *b;
310int cmd;
311long num;
312char *ptr;
313 {
314 SSL **sslp,*ssl;
315 BIO_SSL *bs;
316 BIO *dbio,*bio;
317 long ret=1;
318
319 bs=(BIO_SSL *)b->ptr;
320 ssl=bs->ssl;
321 if ((ssl == NULL) && (cmd != BIO_C_SET_SSL))
322 return(0);
323 switch (cmd)
324 {
325 case BIO_CTRL_RESET:
326 SSL_shutdown(ssl);
327
328 if (ssl->handshake_func == ssl->method->ssl_connect)
329 SSL_set_connect_state(ssl);
330 else if (ssl->handshake_func == ssl->method->ssl_accept)
331 SSL_set_accept_state(ssl);
332
333 SSL_clear(ssl);
334
335 if (b->next_bio != NULL)
336 ret=BIO_ctrl(b->next_bio,cmd,num,ptr);
337 else if (ssl->rbio != NULL)
338 ret=BIO_ctrl(ssl->rbio,cmd,num,ptr);
339 else
340 ret=1;
341 break;
342 case BIO_CTRL_INFO:
343 ret=0;
344 break;
345 case BIO_C_SSL_MODE:
346 if (num) /* client mode */
347 SSL_set_connect_state(ssl);
348 else
349 SSL_set_accept_state(ssl);
350 break;
351 case BIO_C_SET_SSL_RENEGOTIATE_TIMEOUT:
352 ret=bs->renegotiate_timeout;
353 if (num < 60) num=5;
354 bs->renegotiate_timeout=(unsigned long)num;
355 bs->last_time=(unsigned long)time(NULL);
356 break;
357 case BIO_C_SET_SSL_RENEGOTIATE_BYTES:
358 ret=bs->renegotiate_count;
359 if ((long)num >=512)
360 bs->renegotiate_count=(unsigned long)num;
361 break;
362 case BIO_C_GET_SSL_NUM_RENEGOTIATES:
363 ret=bs->num_renegotiates;
364 break;
365 case BIO_C_SET_SSL:
366 if (ssl != NULL)
367 ssl_free(b);
368 b->shutdown=(int)num;
369 ssl=(SSL *)ptr;
370 ((BIO_SSL *)b->ptr)->ssl=ssl;
371 bio=SSL_get_rbio(ssl);
372 if (bio != NULL)
373 {
374 if (b->next_bio != NULL)
375 BIO_push(bio,b->next_bio);
376 b->next_bio=bio;
377 CRYPTO_add(&bio->references,1,CRYPTO_LOCK_BIO);
378 }
379 b->init=1;
380 break;
381 case BIO_C_GET_SSL:
382 if (ptr != NULL)
383 {
384 sslp=(SSL **)ptr;
385 *sslp=ssl;
386 }
387 else
388 ret=0;
389 break;
390 case BIO_CTRL_GET_CLOSE:
391 ret=b->shutdown;
392 break;
393 case BIO_CTRL_SET_CLOSE:
394 b->shutdown=(int)num;
395 break;
396 case BIO_CTRL_WPENDING:
397 ret=BIO_ctrl(ssl->wbio,cmd,num,ptr);
398 break;
399 case BIO_CTRL_PENDING:
400 ret=SSL_pending(ssl);
401 if (ret == 0)
402 ret=BIO_pending(ssl->rbio);
403 break;
404 case BIO_CTRL_FLUSH:
405 BIO_clear_retry_flags(b);
406 ret=BIO_ctrl(ssl->wbio,cmd,num,ptr);
407 BIO_copy_next_retry(b);
408 break;
409 case BIO_CTRL_PUSH:
410 if ((b->next_bio != NULL) && (b->next_bio != ssl->rbio))
411 {
412 SSL_set_bio(ssl,b->next_bio,b->next_bio);
413 CRYPTO_add(&b->next_bio->references,1,CRYPTO_LOCK_BIO);
414 }
415 break;
416 case BIO_CTRL_POP:
417 /* ugly bit of a hack */
418 if (ssl->rbio != ssl->wbio) /* we are in trouble :-( */
419 {
420 BIO_free_all(ssl->wbio);
421 }
422 ssl->wbio=NULL;
423 ssl->rbio=NULL;
424 break;
425 case BIO_C_DO_STATE_MACHINE:
426 BIO_clear_retry_flags(b);
427
428 b->retry_reason=0;
429 ret=(int)SSL_do_handshake(ssl);
430
431 switch (SSL_get_error(ssl,(int)ret))
432 {
433 case SSL_ERROR_WANT_READ:
434 BIO_set_flags(b,
435 BIO_FLAGS_READ|BIO_FLAGS_SHOULD_RETRY);
436 break;
437 case SSL_ERROR_WANT_WRITE:
438 BIO_set_flags(b,
439 BIO_FLAGS_WRITE|BIO_FLAGS_SHOULD_RETRY);
440 break;
441 case SSL_ERROR_WANT_CONNECT:
442 BIO_set_flags(b,
443 BIO_FLAGS_IO_SPECIAL|BIO_FLAGS_SHOULD_RETRY);
444 b->retry_reason=b->next_bio->retry_reason;
445 break;
446 default:
447 break;
448 }
449 break;
450 case BIO_CTRL_DUP:
451 dbio=(BIO *)ptr;
452 if (((BIO_SSL *)dbio->ptr)->ssl != NULL)
453 SSL_free(((BIO_SSL *)dbio->ptr)->ssl);
454 ((BIO_SSL *)dbio->ptr)->ssl=SSL_dup(ssl);
455 ((BIO_SSL *)dbio->ptr)->renegotiate_count=
456 ((BIO_SSL *)b->ptr)->renegotiate_count;
457 ((BIO_SSL *)dbio->ptr)->byte_count=
458 ((BIO_SSL *)b->ptr)->byte_count;
459 ((BIO_SSL *)dbio->ptr)->renegotiate_timeout=
460 ((BIO_SSL *)b->ptr)->renegotiate_timeout;
461 ((BIO_SSL *)dbio->ptr)->last_time=
462 ((BIO_SSL *)b->ptr)->last_time;
463 ret=(((BIO_SSL *)dbio->ptr)->ssl != NULL);
464 break;
465 case BIO_C_GET_FD:
466 ret=BIO_ctrl(ssl->rbio,cmd,num,ptr);
467 break;
468 case BIO_CTRL_SET_CALLBACK:
469 SSL_set_info_callback(ssl,(void (*)())ptr);
470 break;
471 case BIO_CTRL_GET_CALLBACK:
472 {
473 void (**fptr)();
474
475 fptr=(void (**)())ptr;
476 *fptr=SSL_get_info_callback(ssl);
477 }
478 break;
479 default:
480 ret=BIO_ctrl(ssl->rbio,cmd,num,ptr);
481 break;
482 }
483 return(ret);
484 }
485
486static int ssl_puts(bp,str)
487BIO *bp;
488char *str;
489 {
490 int n,ret;
491
492 n=strlen(str);
493 ret=BIO_write(bp,str,n);
494 return(ret);
495 }
496
497BIO *BIO_new_buffer_ssl_connect(ctx)
498SSL_CTX *ctx;
499 {
500 BIO *ret=NULL,*buf=NULL,*ssl=NULL;
501
502 if ((buf=BIO_new(BIO_f_buffer())) == NULL)
503 return(NULL);
504 if ((ssl=BIO_new_ssl_connect(ctx)) == NULL)
505 goto err;
506 if ((ret=BIO_push(buf,ssl)) == NULL)
507 goto err;
508 return(ret);
509err:
510 if (buf != NULL) BIO_free(buf);
511 if (ssl != NULL) BIO_free(ssl);
512 return(NULL);
513 }
514
515BIO *BIO_new_ssl_connect(ctx)
516SSL_CTX *ctx;
517 {
518 BIO *ret=NULL,*con=NULL,*ssl=NULL;
519
520 if ((con=BIO_new(BIO_s_connect())) == NULL)
521 return(NULL);
522 if ((ssl=BIO_new_ssl(ctx,1)) == NULL)
523 goto err;
524 if ((ret=BIO_push(ssl,con)) == NULL)
525 goto err;
526 return(ret);
527err:
528 if (con != NULL) BIO_free(con);
529 if (ret != NULL) BIO_free(ret);
530 return(NULL);
531 }
532
533BIO *BIO_new_ssl(ctx,client)
534SSL_CTX *ctx;
535int client;
536 {
537 BIO *ret;
538 SSL *ssl;
539
540 if ((ret=BIO_new(BIO_f_ssl())) == NULL)
541 return(NULL);
542 if ((ssl=SSL_new(ctx)) == NULL)
543 {
544 BIO_free(ret);
545 return(NULL);
546 }
547 if (client)
548 SSL_set_connect_state(ssl);
549 else
550 SSL_set_accept_state(ssl);
551
552 BIO_set_ssl(ret,ssl,BIO_CLOSE);
553 return(ret);
554 }
555
556int BIO_ssl_copy_session_id(t,f)
557BIO *t,*f;
558 {
559 t=BIO_find_type(t,BIO_TYPE_SSL);
560 f=BIO_find_type(f,BIO_TYPE_SSL);
561 if ((t == NULL) || (f == NULL))
562 return(0);
563 if ( (((BIO_SSL *)t->ptr)->ssl == NULL) ||
564 (((BIO_SSL *)f->ptr)->ssl == NULL))
565 return(0);
566 SSL_copy_session_id(((BIO_SSL *)t->ptr)->ssl,((BIO_SSL *)f->ptr)->ssl);
567 return(1);
568 }
569
570void BIO_ssl_shutdown(b)
571BIO *b;
572 {
573 SSL *s;
574
575 while (b != NULL)
576 {
577 if (b->method->type == BIO_TYPE_SSL)
578 {
579 s=((BIO_SSL *)b->ptr)->ssl;
580 SSL_shutdown(s);
581 break;
582 }
583 b=b->next_bio;
584 }
585 }
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