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>
68 static int ssl_write(BIO *h, const char *buf, int num);
69 static int ssl_read(BIO *h, char *buf, int size);
70 static int ssl_puts(BIO *h, const char *str);
71 static long ssl_ctrl(BIO *h, int cmd, long arg1, void *arg2);
72 static int ssl_new(BIO *h);
73 static int ssl_free(BIO *data);
74 static long ssl_callback_ctrl(BIO *h, int cmd, bio_info_cb *fp);
75 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 *)OPENSSL_malloc(sizeof(BIO_SSL));
108 BIOerr(BIO_F_SSL_NEW, ERR_R_MALLOC_FAILURE);
111 memset(bs, 0, sizeof(BIO_SSL));
113 bi->ptr = (char *)bs;
118 static int ssl_free(BIO *a)
124 bs = (BIO_SSL *)a->ptr;
126 SSL_shutdown(bs->ssl);
128 if (a->init && (bs->ssl != NULL))
134 OPENSSL_free(a->ptr);
138 static int ssl_read(BIO *b, char *out, int outl)
143 int retry_reason = 0;
148 sb = (BIO_SSL *)b->ptr;
151 BIO_clear_retry_flags(b);
153 ret = SSL_read(ssl, out, outl);
155 switch (SSL_get_error(ssl, ret)) {
159 if (sb->renegotiate_count > 0) {
160 sb->byte_count += ret;
161 if (sb->byte_count > sb->renegotiate_count) {
163 sb->num_renegotiates++;
164 SSL_renegotiate(ssl);
168 if ((sb->renegotiate_timeout > 0) && (!r)) {
171 tm = (unsigned long)time(NULL);
172 if (tm > sb->last_time + sb->renegotiate_timeout) {
174 sb->num_renegotiates++;
175 SSL_renegotiate(ssl);
180 case SSL_ERROR_WANT_READ:
181 BIO_set_retry_read(b);
183 case SSL_ERROR_WANT_WRITE:
184 BIO_set_retry_write(b);
186 case SSL_ERROR_WANT_X509_LOOKUP:
187 BIO_set_retry_special(b);
188 retry_reason = BIO_RR_SSL_X509_LOOKUP;
190 case SSL_ERROR_WANT_ACCEPT:
191 BIO_set_retry_special(b);
192 retry_reason = BIO_RR_ACCEPT;
194 case SSL_ERROR_WANT_CONNECT:
195 BIO_set_retry_special(b);
196 retry_reason = BIO_RR_CONNECT;
198 case SSL_ERROR_SYSCALL:
200 case SSL_ERROR_ZERO_RETURN:
205 b->retry_reason = retry_reason;
209 static int ssl_write(BIO *b, const char *out, int outl)
212 int retry_reason = 0;
218 bs = (BIO_SSL *)b->ptr;
221 BIO_clear_retry_flags(b);
224 * ret=SSL_do_handshake(ssl); if (ret > 0)
226 ret = SSL_write(ssl, out, outl);
228 switch (SSL_get_error(ssl, ret)) {
232 if (bs->renegotiate_count > 0) {
233 bs->byte_count += ret;
234 if (bs->byte_count > bs->renegotiate_count) {
236 bs->num_renegotiates++;
237 SSL_renegotiate(ssl);
241 if ((bs->renegotiate_timeout > 0) && (!r)) {
244 tm = (unsigned long)time(NULL);
245 if (tm > bs->last_time + bs->renegotiate_timeout) {
247 bs->num_renegotiates++;
248 SSL_renegotiate(ssl);
252 case SSL_ERROR_WANT_WRITE:
253 BIO_set_retry_write(b);
255 case SSL_ERROR_WANT_READ:
256 BIO_set_retry_read(b);
258 case SSL_ERROR_WANT_X509_LOOKUP:
259 BIO_set_retry_special(b);
260 retry_reason = BIO_RR_SSL_X509_LOOKUP;
262 case SSL_ERROR_WANT_CONNECT:
263 BIO_set_retry_special(b);
264 retry_reason = BIO_RR_CONNECT;
265 case SSL_ERROR_SYSCALL:
271 b->retry_reason = retry_reason;
275 static long ssl_ctrl(BIO *b, int cmd, long num, void *ptr)
282 bs = (BIO_SSL *)b->ptr;
284 if ((ssl == NULL) && (cmd != BIO_C_SET_SSL))
290 if (ssl->handshake_func == ssl->method->ssl_connect)
291 SSL_set_connect_state(ssl);
292 else if (ssl->handshake_func == ssl->method->ssl_accept)
293 SSL_set_accept_state(ssl);
295 if(!SSL_clear(ssl)) {
300 if (b->next_bio != NULL)
301 ret = BIO_ctrl(b->next_bio, cmd, num, ptr);
302 else if (ssl->rbio != NULL)
303 ret = BIO_ctrl(ssl->rbio, cmd, num, ptr);
311 if (num) /* client mode */
312 SSL_set_connect_state(ssl);
314 SSL_set_accept_state(ssl);
316 case BIO_C_SET_SSL_RENEGOTIATE_TIMEOUT:
317 ret = bs->renegotiate_timeout;
320 bs->renegotiate_timeout = (unsigned long)num;
321 bs->last_time = (unsigned long)time(NULL);
323 case BIO_C_SET_SSL_RENEGOTIATE_BYTES:
324 ret = bs->renegotiate_count;
325 if ((long)num >= 512)
326 bs->renegotiate_count = (unsigned long)num;
328 case BIO_C_GET_SSL_NUM_RENEGOTIATES:
329 ret = bs->num_renegotiates;
337 b->shutdown = (int)num;
339 ((BIO_SSL *)b->ptr)->ssl = ssl;
340 bio = SSL_get_rbio(ssl);
342 if (b->next_bio != NULL)
343 BIO_push(bio, b->next_bio);
345 CRYPTO_add(&bio->references, 1, CRYPTO_LOCK_BIO);
356 case BIO_CTRL_GET_CLOSE:
359 case BIO_CTRL_SET_CLOSE:
360 b->shutdown = (int)num;
362 case BIO_CTRL_WPENDING:
363 ret = BIO_ctrl(ssl->wbio, cmd, num, ptr);
365 case BIO_CTRL_PENDING:
366 ret = SSL_pending(ssl);
368 ret = BIO_pending(ssl->rbio);
371 BIO_clear_retry_flags(b);
372 ret = BIO_ctrl(ssl->wbio, cmd, num, ptr);
373 BIO_copy_next_retry(b);
376 if ((b->next_bio != NULL) && (b->next_bio != ssl->rbio)) {
377 SSL_set_bio(ssl, b->next_bio, b->next_bio);
378 CRYPTO_add(&b->next_bio->references, 1, CRYPTO_LOCK_BIO);
382 /* Only detach if we are the BIO explicitly being popped */
385 * Shouldn't happen in practice because the rbio and wbio are the
388 if (ssl->rbio != ssl->wbio)
389 BIO_free_all(ssl->wbio);
390 if (b->next_bio != NULL)
391 CRYPTO_add(&b->next_bio->references, -1, CRYPTO_LOCK_BIO);
396 case BIO_C_DO_STATE_MACHINE:
397 BIO_clear_retry_flags(b);
400 ret = (int)SSL_do_handshake(ssl);
402 switch (SSL_get_error(ssl, (int)ret)) {
403 case SSL_ERROR_WANT_READ:
404 BIO_set_flags(b, BIO_FLAGS_READ | BIO_FLAGS_SHOULD_RETRY);
406 case SSL_ERROR_WANT_WRITE:
407 BIO_set_flags(b, BIO_FLAGS_WRITE | BIO_FLAGS_SHOULD_RETRY);
409 case SSL_ERROR_WANT_CONNECT:
410 BIO_set_flags(b, BIO_FLAGS_IO_SPECIAL | BIO_FLAGS_SHOULD_RETRY);
411 b->retry_reason = b->next_bio->retry_reason;
419 if (((BIO_SSL *)dbio->ptr)->ssl != NULL)
420 SSL_free(((BIO_SSL *)dbio->ptr)->ssl);
421 ((BIO_SSL *)dbio->ptr)->ssl = SSL_dup(ssl);
422 ((BIO_SSL *)dbio->ptr)->renegotiate_count =
423 ((BIO_SSL *)b->ptr)->renegotiate_count;
424 ((BIO_SSL *)dbio->ptr)->byte_count = ((BIO_SSL *)b->ptr)->byte_count;
425 ((BIO_SSL *)dbio->ptr)->renegotiate_timeout =
426 ((BIO_SSL *)b->ptr)->renegotiate_timeout;
427 ((BIO_SSL *)dbio->ptr)->last_time = ((BIO_SSL *)b->ptr)->last_time;
428 ret = (((BIO_SSL *)dbio->ptr)->ssl != NULL);
431 ret = BIO_ctrl(ssl->rbio, cmd, num, ptr);
433 case BIO_CTRL_SET_CALLBACK:
435 #if 0 /* FIXME: Should this be used? -- Richard
437 SSLerr(SSL_F_SSL_CTRL, ERR_R_SHOULD_NOT_HAVE_BEEN_CALLED);
444 case BIO_CTRL_GET_CALLBACK:
446 void (**fptr) (const SSL *xssl, int type, int val);
448 fptr = (void (**)(const SSL *xssl, int type, int val))ptr;
449 *fptr = SSL_get_info_callback(ssl);
453 ret = BIO_ctrl(ssl->rbio, cmd, num, ptr);
459 static long ssl_callback_ctrl(BIO *b, int cmd, bio_info_cb *fp)
465 bs = (BIO_SSL *)b->ptr;
468 case BIO_CTRL_SET_CALLBACK:
471 * FIXME: setting this via a completely different prototype seems
474 SSL_set_info_callback(ssl, (void (*)(const SSL *, int, int))fp);
478 ret = BIO_callback_ctrl(ssl->rbio, cmd, fp);
484 static int ssl_puts(BIO *bp, const char *str)
489 ret = BIO_write(bp, str, n);
493 BIO *BIO_new_buffer_ssl_connect(SSL_CTX *ctx)
495 #ifndef OPENSSL_NO_SOCK
496 BIO *ret = NULL, *buf = NULL, *ssl = NULL;
498 if ((buf = BIO_new(BIO_f_buffer())) == NULL)
500 if ((ssl = BIO_new_ssl_connect(ctx)) == NULL)
502 if ((ret = BIO_push(buf, ssl)) == NULL)
512 BIO *BIO_new_ssl_connect(SSL_CTX *ctx)
514 #ifndef OPENSSL_NO_SOCK
515 BIO *ret = NULL, *con = NULL, *ssl = NULL;
517 if ((con = BIO_new(BIO_s_connect())) == NULL)
519 if ((ssl = BIO_new_ssl(ctx, 1)) == NULL)
521 if ((ret = BIO_push(ssl, con)) == NULL)
530 BIO *BIO_new_ssl(SSL_CTX *ctx, int client)
535 if ((ret = BIO_new(BIO_f_ssl())) == NULL)
537 if ((ssl = SSL_new(ctx)) == NULL) {
542 SSL_set_connect_state(ssl);
544 SSL_set_accept_state(ssl);
546 BIO_set_ssl(ret, ssl, BIO_CLOSE);
550 int BIO_ssl_copy_session_id(BIO *t, BIO *f)
552 t = BIO_find_type(t, BIO_TYPE_SSL);
553 f = BIO_find_type(f, BIO_TYPE_SSL);
554 if ((t == NULL) || (f == NULL))
556 if ((((BIO_SSL *)t->ptr)->ssl == NULL) ||
557 (((BIO_SSL *)f->ptr)->ssl == NULL))
559 if(!SSL_copy_session_id(((BIO_SSL *)t->ptr)->ssl, ((BIO_SSL *)f->ptr)->ssl))
564 void BIO_ssl_shutdown(BIO *b)
569 if (b->method->type == BIO_TYPE_SSL) {
570 s = ((BIO_SSL *)b->ptr)->ssl;