2 /* Copyright (C) 1995-1998 Eric Young (eay@cryptsoft.com)
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.
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).
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.
23 * Redistribution and use in source and binary forms, with or without
24 * modification, are permitted provided that the following conditions
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)"
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
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.]
63 #include <openssl/crypto.h>
64 #include <openssl/bio.h>
65 #include <openssl/err.h>
66 #include <openssl/ssl.h>
68 static int ssl_write(BIO *h,char *buf,int num);
69 static int ssl_read(BIO *h,char *buf,int size);
70 static int ssl_puts(BIO *h,char *str);
71 static long ssl_ctrl(BIO *h,int cmd,long arg1,char *arg2);
72 static int ssl_new(BIO *h);
73 static int ssl_free(BIO *data);
74 typedef struct bio_ssl_st
76 SSL *ssl; /* The ssl handle :-) */
77 /* re-negotiate every time the total number of bytes is this size */
79 unsigned long renegotiate_count;
80 unsigned long byte_count;
81 unsigned long renegotiate_timeout;
82 unsigned long last_time;
85 static BIO_METHOD methods_sslp=
97 BIO_METHOD *BIO_f_ssl(void)
99 return(&methods_sslp);
102 static int ssl_new(BIO *bi)
106 bs=(BIO_SSL *)Malloc(sizeof(BIO_SSL));
109 BIOerr(BIO_F_SSL_NEW,ERR_R_MALLOC_FAILURE);
112 memset(bs,0,sizeof(BIO_SSL));
119 static int ssl_free(BIO *a)
123 if (a == NULL) return(0);
124 bs=(BIO_SSL *)a->ptr;
125 if (bs->ssl != NULL) SSL_shutdown(bs->ssl);
128 if (a->init && (bs->ssl != NULL))
138 static int ssl_read(BIO *b, char *out, int outl)
146 if (out == NULL) return(0);
147 sb=(BIO_SSL *)b->ptr;
150 BIO_clear_retry_flags(b);
153 if (!SSL_is_init_finished(ssl))
155 /* ret=SSL_do_handshake(ssl); */
159 outflags=(BIO_FLAGS_READ|BIO_FLAGS_SHOULD_RETRY);
166 ret=SSL_read(ssl,out,outl);
168 switch (SSL_get_error(ssl,ret))
172 if (sb->renegotiate_count > 0)
175 if (sb->byte_count > sb->renegotiate_count)
178 sb->num_renegotiates++;
179 SSL_renegotiate(ssl);
183 if ((sb->renegotiate_timeout > 0) && (!r))
187 tm=(unsigned long)time(NULL);
188 if (tm > sb->last_time+sb->renegotiate_timeout)
191 sb->num_renegotiates++;
192 SSL_renegotiate(ssl);
197 case SSL_ERROR_WANT_READ:
198 BIO_set_retry_read(b);
200 case SSL_ERROR_WANT_WRITE:
201 BIO_set_retry_write(b);
203 case SSL_ERROR_WANT_X509_LOOKUP:
204 BIO_set_retry_special(b);
205 retry_reason=BIO_RR_SSL_X509_LOOKUP;
207 case SSL_ERROR_WANT_CONNECT:
208 BIO_set_retry_special(b);
209 retry_reason=BIO_RR_CONNECT;
211 case SSL_ERROR_SYSCALL:
213 case SSL_ERROR_ZERO_RETURN:
218 b->retry_reason=retry_reason;
222 static int ssl_write(BIO *b, char *out, int outl)
229 if (out == NULL) return(0);
230 bs=(BIO_SSL *)b->ptr;
233 BIO_clear_retry_flags(b);
235 /* ret=SSL_do_handshake(ssl);
237 ret=SSL_write(ssl,out,outl);
239 switch (SSL_get_error(ssl,ret))
243 if (bs->renegotiate_count > 0)
246 if (bs->byte_count > bs->renegotiate_count)
249 bs->num_renegotiates++;
250 SSL_renegotiate(ssl);
254 if ((bs->renegotiate_timeout > 0) && (!r))
258 tm=(unsigned long)time(NULL);
259 if (tm > bs->last_time+bs->renegotiate_timeout)
262 bs->num_renegotiates++;
263 SSL_renegotiate(ssl);
267 case SSL_ERROR_WANT_WRITE:
268 BIO_set_retry_write(b);
270 case SSL_ERROR_WANT_READ:
271 BIO_set_retry_read(b);
273 case SSL_ERROR_WANT_X509_LOOKUP:
274 BIO_set_retry_special(b);
275 retry_reason=BIO_RR_SSL_X509_LOOKUP;
277 case SSL_ERROR_WANT_CONNECT:
278 BIO_set_retry_special(b);
279 retry_reason=BIO_RR_CONNECT;
280 case SSL_ERROR_SYSCALL:
286 b->retry_reason=retry_reason;
290 static long ssl_ctrl(BIO *b, int cmd, long num, char *ptr)
297 bs=(BIO_SSL *)b->ptr;
299 if ((ssl == NULL) && (cmd != BIO_C_SET_SSL))
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);
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);
324 if (num) /* client mode */
325 SSL_set_connect_state(ssl);
327 SSL_set_accept_state(ssl);
329 case BIO_C_SET_SSL_RENEGOTIATE_TIMEOUT:
330 ret=bs->renegotiate_timeout;
332 bs->renegotiate_timeout=(unsigned long)num;
333 bs->last_time=(unsigned long)time(NULL);
335 case BIO_C_SET_SSL_RENEGOTIATE_BYTES:
336 ret=bs->renegotiate_count;
338 bs->renegotiate_count=(unsigned long)num;
340 case BIO_C_GET_SSL_NUM_RENEGOTIATES:
341 ret=bs->num_renegotiates;
346 b->shutdown=(int)num;
348 ((BIO_SSL *)b->ptr)->ssl=ssl;
349 bio=SSL_get_rbio(ssl);
352 if (b->next_bio != NULL)
353 BIO_push(bio,b->next_bio);
355 CRYPTO_add(&bio->references,1,CRYPTO_LOCK_BIO);
368 case BIO_CTRL_GET_CLOSE:
371 case BIO_CTRL_SET_CLOSE:
372 b->shutdown=(int)num;
374 case BIO_CTRL_WPENDING:
375 ret=BIO_ctrl(ssl->wbio,cmd,num,ptr);
377 case BIO_CTRL_PENDING:
378 ret=SSL_pending(ssl);
380 ret=BIO_pending(ssl->rbio);
383 BIO_clear_retry_flags(b);
384 ret=BIO_ctrl(ssl->wbio,cmd,num,ptr);
385 BIO_copy_next_retry(b);
388 if ((b->next_bio != NULL) && (b->next_bio != ssl->rbio))
390 SSL_set_bio(ssl,b->next_bio,b->next_bio);
391 CRYPTO_add(&b->next_bio->references,1,CRYPTO_LOCK_BIO);
395 /* ugly bit of a hack */
396 if (ssl->rbio != ssl->wbio) /* we are in trouble :-( */
398 BIO_free_all(ssl->wbio);
403 case BIO_C_DO_STATE_MACHINE:
404 BIO_clear_retry_flags(b);
407 ret=(int)SSL_do_handshake(ssl);
409 switch (SSL_get_error(ssl,(int)ret))
411 case SSL_ERROR_WANT_READ:
413 BIO_FLAGS_READ|BIO_FLAGS_SHOULD_RETRY);
415 case SSL_ERROR_WANT_WRITE:
417 BIO_FLAGS_WRITE|BIO_FLAGS_SHOULD_RETRY);
419 case SSL_ERROR_WANT_CONNECT:
421 BIO_FLAGS_IO_SPECIAL|BIO_FLAGS_SHOULD_RETRY);
422 b->retry_reason=b->next_bio->retry_reason;
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);
444 ret=BIO_ctrl(ssl->rbio,cmd,num,ptr);
446 case BIO_CTRL_SET_CALLBACK:
447 SSL_set_info_callback(ssl,(void (*)())ptr);
449 case BIO_CTRL_GET_CALLBACK:
453 fptr=(void (**)())ptr;
454 *fptr=SSL_get_info_callback(ssl);
458 ret=BIO_ctrl(ssl->rbio,cmd,num,ptr);
464 static int ssl_puts(BIO *bp, char *str)
469 ret=BIO_write(bp,str,n);
473 BIO *BIO_new_buffer_ssl_connect(SSL_CTX *ctx)
475 BIO *ret=NULL,*buf=NULL,*ssl=NULL;
477 if ((buf=BIO_new(BIO_f_buffer())) == NULL)
479 if ((ssl=BIO_new_ssl_connect(ctx)) == NULL)
481 if ((ret=BIO_push(buf,ssl)) == NULL)
485 if (buf != NULL) BIO_free(buf);
486 if (ssl != NULL) BIO_free(ssl);
490 BIO *BIO_new_ssl_connect(SSL_CTX *ctx)
492 BIO *ret=NULL,*con=NULL,*ssl=NULL;
494 if ((con=BIO_new(BIO_s_connect())) == NULL)
496 if ((ssl=BIO_new_ssl(ctx,1)) == NULL)
498 if ((ret=BIO_push(ssl,con)) == NULL)
502 if (con != NULL) BIO_free(con);
503 if (ret != NULL) BIO_free(ret);
507 BIO *BIO_new_ssl(SSL_CTX *ctx, int client)
512 if ((ret=BIO_new(BIO_f_ssl())) == NULL)
514 if ((ssl=SSL_new(ctx)) == NULL)
520 SSL_set_connect_state(ssl);
522 SSL_set_accept_state(ssl);
524 BIO_set_ssl(ret,ssl,BIO_CLOSE);
528 int BIO_ssl_copy_session_id(BIO *t, BIO *f)
530 t=BIO_find_type(t,BIO_TYPE_SSL);
531 f=BIO_find_type(f,BIO_TYPE_SSL);
532 if ((t == NULL) || (f == NULL))
534 if ( (((BIO_SSL *)t->ptr)->ssl == NULL) ||
535 (((BIO_SSL *)f->ptr)->ssl == NULL))
537 SSL_copy_session_id(((BIO_SSL *)t->ptr)->ssl,((BIO_SSL *)f->ptr)->ssl);
541 void BIO_ssl_shutdown(BIO *b)
547 if (b->method->type == BIO_TYPE_SSL)
549 s=((BIO_SSL *)b->ptr)->ssl;