2 /* Copyright (C) 1995-1997 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.]
67 static int ssl_write(BIO *h,char *buf,int num);
68 static int ssl_read(BIO *h,char *buf,int size);
69 static int ssl_puts(BIO *h,char *str);
70 static long ssl_ctrl(BIO *h,int cmd,long arg1,char *arg2);
71 static int ssl_new(BIO *h);
72 static int ssl_free(BIO *data);
74 static int ssl_write();
75 static int ssl_read();
76 static int ssl_puts();
77 static long ssl_ctrl();
79 static int ssl_free();
82 static BIO_METHOD methods_sslp=
94 BIO_METHOD *BIO_f_ssl()
96 return(&methods_sslp);
99 static int ssl_new(bi)
103 bi->ptr=NULL; /* The SSL structure */
108 static int ssl_free(a)
111 if (a == NULL) return(0);
112 if (a->ptr != NULL) SSL_shutdown((SSL *)a->ptr);
115 if (a->init) SSL_free((SSL *)a->ptr);
123 static int ssl_read(b,out,outl)
129 int inflags,outflags;
133 if (out == NULL) return(0);
136 inflags=outflags=b->flags;
138 dr=inflags&BIO_FLAGS_PROTOCOL_DELAYED_READ;
139 dw=inflags&BIO_FLAGS_PROTOCOL_DELAYED_WRITE;
141 outflags&= ~(BIO_FLAGS_RWS|BIO_FLAGS_SHOULD_RETRY|
142 BIO_FLAGS_PROTOCOL_DELAYED_WRITE|
143 BIO_FLAGS_PROTOCOL_DELAYED_READ);
145 if (!SSL_is_init_finished(ssl))
147 ret=SSL_do_handshake(ssl);
151 outflags=(BIO_FLAGS_READ|BIO_FLAGS_SHOULD_RETRY|
152 BIO_FLAGS_PROTOCOL_DELAYED_READ|dw);
159 ret=SSL_read(ssl,out,outl);
161 switch (SSL_get_error(ssl,ret))
166 outflags|=(BIO_FLAGS_WRITE|BIO_FLAGS_SHOULD_RETRY);
168 case SSL_ERROR_WANT_READ:
169 outflags=(BIO_FLAGS_READ|BIO_FLAGS_SHOULD_RETRY|
170 BIO_FLAGS_PROTOCOL_DELAYED_READ|dw);
172 case SSL_ERROR_WANT_WRITE:
173 outflags=(BIO_FLAGS_WRITE|BIO_FLAGS_SHOULD_RETRY|
174 BIO_FLAGS_PROTOCOL_DELAYED_READ|dw);
176 case SSL_ERROR_WANT_X509_LOOKUP:
177 outflags=(BIO_FLAGS_IO_SPECIAL|BIO_FLAGS_SHOULD_RETRY|
178 BIO_FLAGS_PROTOCOL_DELAYED_READ|dw);
179 retry_reason=BIO_RR_SSL_X509_LOOKUP;
181 case SSL_ERROR_WANT_CONNECT:
182 outflags=(BIO_FLAGS_IO_SPECIAL|BIO_FLAGS_SHOULD_RETRY|
183 BIO_FLAGS_PROTOCOL_DELAYED_READ|dw);
184 retry_reason=BIO_RR_CONNECT;
186 case SSL_ERROR_SYSCALL:
188 case SSL_ERROR_ZERO_RETURN:
193 b->retry_reason=retry_reason;
198 static int ssl_write(b,out,outl)
204 int inflags,outflags,retry_reason=0;
207 if (out == NULL) return(0);
210 inflags=outflags=b->flags;
212 dr=inflags&BIO_FLAGS_PROTOCOL_DELAYED_READ;
213 dw=inflags&BIO_FLAGS_PROTOCOL_DELAYED_WRITE;
215 outflags&= ~(BIO_FLAGS_RWS|BIO_FLAGS_SHOULD_RETRY|
216 BIO_FLAGS_PROTOCOL_DELAYED_WRITE|
217 BIO_FLAGS_PROTOCOL_DELAYED_READ);
219 ret=SSL_do_handshake(ssl);
221 ret=SSL_write(ssl,out,outl);
223 switch (SSL_get_error(ssl,ret))
228 outflags|=(BIO_FLAGS_READ|BIO_FLAGS_SHOULD_RETRY);
230 case SSL_ERROR_WANT_WRITE:
231 outflags=(BIO_FLAGS_WRITE|BIO_FLAGS_SHOULD_RETRY|
232 BIO_FLAGS_PROTOCOL_DELAYED_WRITE|dr);
234 case SSL_ERROR_WANT_READ:
235 outflags=(BIO_FLAGS_READ|BIO_FLAGS_SHOULD_RETRY|
236 BIO_FLAGS_PROTOCOL_DELAYED_WRITE|dr);
238 case SSL_ERROR_WANT_X509_LOOKUP:
239 outflags=(BIO_FLAGS_IO_SPECIAL|BIO_FLAGS_SHOULD_RETRY|
240 BIO_FLAGS_PROTOCOL_DELAYED_WRITE|dr);
241 retry_reason=BIO_RR_SSL_X509_LOOKUP;
243 case SSL_ERROR_WANT_CONNECT:
244 outflags=(BIO_FLAGS_IO_SPECIAL|BIO_FLAGS_SHOULD_RETRY|
245 BIO_FLAGS_PROTOCOL_DELAYED_READ|dw);
246 retry_reason=BIO_RR_CONNECT;
247 case SSL_ERROR_SYSCALL:
253 b->retry_reason=retry_reason;
258 static long ssl_ctrl(b,cmd,num,ptr)
274 if (ssl->handshake_func == ssl->method->ssl_connect)
275 SSL_set_connect_state(ssl);
276 else if (ssl->handshake_func == ssl->method->ssl_accept)
277 SSL_set_accept_state(ssl);
281 if (b->next_bio != NULL)
282 ret=BIO_ctrl(b->next_bio,cmd,num,ptr);
283 else if (ssl->rbio != NULL)
284 ret=BIO_ctrl(ssl->rbio,cmd,num,ptr);
293 if (num) /* client mode */
294 SSL_set_connect_state(ssl);
296 SSL_set_accept_state(ssl);
300 b->shutdown=(int)num;
303 bio=SSL_get_rbio(ssl);
306 if (b->next_bio != NULL)
307 BIO_push(bio,b->next_bio);
319 case BIO_CTRL_GET_CLOSE:
322 case BIO_CTRL_SET_CLOSE:
323 b->shutdown=(int)num;
325 case BIO_CTRL_WPENDING:
326 ret=BIO_ctrl(ssl->wbio,cmd,num,ptr);
328 case BIO_CTRL_PENDING:
329 ret=SSL_pending(ssl);
331 ret=BIO_pending(ssl->rbio);
334 BIO_clear_retry_flags(b);
335 ret=BIO_ctrl(ssl->wbio,cmd,num,ptr);
336 BIO_copy_next_retry(b);
339 if (b->next_bio != NULL)
341 SSL_set_bio(ssl,b->next_bio,b->next_bio);
342 b->next_bio->references++;
346 /* ugly bit of a hack */
347 if (ssl->rbio != ssl->wbio) /* we are in trouble :-( */
349 BIO_free_all(ssl->wbio);
354 case BIO_C_DO_STATE_MACHINE:
355 BIO_clear_retry_flags(b);
358 ret=(int)SSL_do_handshake(ssl);
360 switch (SSL_get_error(ssl,ret))
362 case SSL_ERROR_WANT_READ:
364 BIO_FLAGS_READ|BIO_FLAGS_SHOULD_RETRY);
366 case SSL_ERROR_WANT_WRITE:
368 BIO_FLAGS_WRITE|BIO_FLAGS_SHOULD_RETRY);
370 case SSL_ERROR_WANT_CONNECT:
372 BIO_FLAGS_IO_SPECIAL|BIO_FLAGS_SHOULD_RETRY);
373 b->retry_reason=b->next_bio->retry_reason;
381 if (dbio->ptr != NULL)
382 SSL_free((SSL *)dbio->ptr);
383 dbio->ptr=(char *)SSL_dup(ssl);
384 ret=(dbio->ptr != NULL);
393 static int ssl_puts(bp,str)
400 ret=BIO_write(bp,str,n);
404 BIO *BIO_new_ssl(ctx,client)
411 if ((ret=BIO_new(BIO_f_ssl())) == NULL)
413 if ((ssl=SSL_new(ctx)) == NULL)
419 SSL_set_connect_state(ssl);
421 SSL_set_accept_state(ssl);
423 BIO_set_ssl(ret,ssl,BIO_CLOSE);
427 int BIO_ssl_copy_session_id(t,f)
430 t=BIO_find_type(t,BIO_TYPE_SSL);
431 f=BIO_find_type(f,BIO_TYPE_SSL);
432 if ((t == NULL) || (f == NULL))
434 if ((t->ptr == NULL) || (f->ptr == NULL))
436 SSL_copy_session_id((SSL *)t->ptr,(SSL *)f->ptr);