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)
104 BIO_SSL *bs = OPENSSL_zalloc(sizeof(*bs));
107 BIOerr(BIO_F_SSL_NEW, ERR_R_MALLOC_FAILURE);
111 bi->ptr = (char *)bs;
116 static int ssl_free(BIO *a)
122 bs = (BIO_SSL *)a->ptr;
124 SSL_shutdown(bs->ssl);
131 OPENSSL_free(a->ptr);
135 static int ssl_read(BIO *b, char *out, int outl)
140 int retry_reason = 0;
145 sb = (BIO_SSL *)b->ptr;
148 BIO_clear_retry_flags(b);
150 ret = SSL_read(ssl, out, outl);
152 switch (SSL_get_error(ssl, ret)) {
156 if (sb->renegotiate_count > 0) {
157 sb->byte_count += ret;
158 if (sb->byte_count > sb->renegotiate_count) {
160 sb->num_renegotiates++;
161 SSL_renegotiate(ssl);
165 if ((sb->renegotiate_timeout > 0) && (!r)) {
168 tm = (unsigned long)time(NULL);
169 if (tm > sb->last_time + sb->renegotiate_timeout) {
171 sb->num_renegotiates++;
172 SSL_renegotiate(ssl);
177 case SSL_ERROR_WANT_READ:
178 BIO_set_retry_read(b);
180 case SSL_ERROR_WANT_WRITE:
181 BIO_set_retry_write(b);
183 case SSL_ERROR_WANT_X509_LOOKUP:
184 BIO_set_retry_special(b);
185 retry_reason = BIO_RR_SSL_X509_LOOKUP;
187 case SSL_ERROR_WANT_ACCEPT:
188 BIO_set_retry_special(b);
189 retry_reason = BIO_RR_ACCEPT;
191 case SSL_ERROR_WANT_CONNECT:
192 BIO_set_retry_special(b);
193 retry_reason = BIO_RR_CONNECT;
195 case SSL_ERROR_SYSCALL:
197 case SSL_ERROR_ZERO_RETURN:
202 b->retry_reason = retry_reason;
206 static int ssl_write(BIO *b, const char *out, int outl)
209 int retry_reason = 0;
215 bs = (BIO_SSL *)b->ptr;
218 BIO_clear_retry_flags(b);
221 * ret=SSL_do_handshake(ssl); if (ret > 0)
223 ret = SSL_write(ssl, out, outl);
225 switch (SSL_get_error(ssl, ret)) {
229 if (bs->renegotiate_count > 0) {
230 bs->byte_count += ret;
231 if (bs->byte_count > bs->renegotiate_count) {
233 bs->num_renegotiates++;
234 SSL_renegotiate(ssl);
238 if ((bs->renegotiate_timeout > 0) && (!r)) {
241 tm = (unsigned long)time(NULL);
242 if (tm > bs->last_time + bs->renegotiate_timeout) {
244 bs->num_renegotiates++;
245 SSL_renegotiate(ssl);
249 case SSL_ERROR_WANT_WRITE:
250 BIO_set_retry_write(b);
252 case SSL_ERROR_WANT_READ:
253 BIO_set_retry_read(b);
255 case SSL_ERROR_WANT_X509_LOOKUP:
256 BIO_set_retry_special(b);
257 retry_reason = BIO_RR_SSL_X509_LOOKUP;
259 case SSL_ERROR_WANT_CONNECT:
260 BIO_set_retry_special(b);
261 retry_reason = BIO_RR_CONNECT;
262 case SSL_ERROR_SYSCALL:
268 b->retry_reason = retry_reason;
272 static long ssl_ctrl(BIO *b, int cmd, long num, void *ptr)
279 bs = (BIO_SSL *)b->ptr;
281 if ((ssl == NULL) && (cmd != BIO_C_SET_SSL))
287 if (ssl->handshake_func == ssl->method->ssl_connect)
288 SSL_set_connect_state(ssl);
289 else if (ssl->handshake_func == ssl->method->ssl_accept)
290 SSL_set_accept_state(ssl);
292 if (!SSL_clear(ssl)) {
297 if (b->next_bio != NULL)
298 ret = BIO_ctrl(b->next_bio, cmd, num, ptr);
299 else if (ssl->rbio != NULL)
300 ret = BIO_ctrl(ssl->rbio, cmd, num, ptr);
308 if (num) /* client mode */
309 SSL_set_connect_state(ssl);
311 SSL_set_accept_state(ssl);
313 case BIO_C_SET_SSL_RENEGOTIATE_TIMEOUT:
314 ret = bs->renegotiate_timeout;
317 bs->renegotiate_timeout = (unsigned long)num;
318 bs->last_time = (unsigned long)time(NULL);
320 case BIO_C_SET_SSL_RENEGOTIATE_BYTES:
321 ret = bs->renegotiate_count;
322 if ((long)num >= 512)
323 bs->renegotiate_count = (unsigned long)num;
325 case BIO_C_GET_SSL_NUM_RENEGOTIATES:
326 ret = bs->num_renegotiates;
334 b->shutdown = (int)num;
336 ((BIO_SSL *)b->ptr)->ssl = ssl;
337 bio = SSL_get_rbio(ssl);
339 if (b->next_bio != NULL)
340 BIO_push(bio, b->next_bio);
342 CRYPTO_add(&bio->references, 1, CRYPTO_LOCK_BIO);
353 case BIO_CTRL_GET_CLOSE:
356 case BIO_CTRL_SET_CLOSE:
357 b->shutdown = (int)num;
359 case BIO_CTRL_WPENDING:
360 ret = BIO_ctrl(ssl->wbio, cmd, num, ptr);
362 case BIO_CTRL_PENDING:
363 ret = SSL_pending(ssl);
365 ret = BIO_pending(ssl->rbio);
368 BIO_clear_retry_flags(b);
369 ret = BIO_ctrl(ssl->wbio, cmd, num, ptr);
370 BIO_copy_next_retry(b);
373 if ((b->next_bio != NULL) && (b->next_bio != ssl->rbio)) {
374 SSL_set_bio(ssl, b->next_bio, b->next_bio);
375 CRYPTO_add(&b->next_bio->references, 1, CRYPTO_LOCK_BIO);
379 /* Only detach if we are the BIO explicitly being popped */
382 * Shouldn't happen in practice because the rbio and wbio are the
385 if (ssl->rbio != ssl->wbio)
386 BIO_free_all(ssl->wbio);
387 if (b->next_bio != NULL)
388 CRYPTO_add(&b->next_bio->references, -1, CRYPTO_LOCK_BIO);
393 case BIO_C_DO_STATE_MACHINE:
394 BIO_clear_retry_flags(b);
397 ret = (int)SSL_do_handshake(ssl);
399 switch (SSL_get_error(ssl, (int)ret)) {
400 case SSL_ERROR_WANT_READ:
401 BIO_set_flags(b, BIO_FLAGS_READ | BIO_FLAGS_SHOULD_RETRY);
403 case SSL_ERROR_WANT_WRITE:
404 BIO_set_flags(b, BIO_FLAGS_WRITE | BIO_FLAGS_SHOULD_RETRY);
406 case SSL_ERROR_WANT_CONNECT:
407 BIO_set_flags(b, BIO_FLAGS_IO_SPECIAL | BIO_FLAGS_SHOULD_RETRY);
408 b->retry_reason = b->next_bio->retry_reason;
416 SSL_free(((BIO_SSL *)dbio->ptr)->ssl);
417 ((BIO_SSL *)dbio->ptr)->ssl = SSL_dup(ssl);
418 ((BIO_SSL *)dbio->ptr)->renegotiate_count =
419 ((BIO_SSL *)b->ptr)->renegotiate_count;
420 ((BIO_SSL *)dbio->ptr)->byte_count = ((BIO_SSL *)b->ptr)->byte_count;
421 ((BIO_SSL *)dbio->ptr)->renegotiate_timeout =
422 ((BIO_SSL *)b->ptr)->renegotiate_timeout;
423 ((BIO_SSL *)dbio->ptr)->last_time = ((BIO_SSL *)b->ptr)->last_time;
424 ret = (((BIO_SSL *)dbio->ptr)->ssl != NULL);
427 ret = BIO_ctrl(ssl->rbio, cmd, num, ptr);
429 case BIO_CTRL_SET_CALLBACK:
431 #if 0 /* FIXME: Should this be used? -- Richard
433 SSLerr(SSL_F_SSL_CTRL, ERR_R_SHOULD_NOT_HAVE_BEEN_CALLED);
440 case BIO_CTRL_GET_CALLBACK:
442 void (**fptr) (const SSL *xssl, int type, int val);
444 fptr = (void (**)(const SSL *xssl, int type, int val))ptr;
445 *fptr = SSL_get_info_callback(ssl);
449 ret = BIO_ctrl(ssl->rbio, cmd, num, ptr);
455 static long ssl_callback_ctrl(BIO *b, int cmd, bio_info_cb *fp)
461 bs = (BIO_SSL *)b->ptr;
464 case BIO_CTRL_SET_CALLBACK:
467 * FIXME: setting this via a completely different prototype seems
470 SSL_set_info_callback(ssl, (void (*)(const SSL *, int, int))fp);
474 ret = BIO_callback_ctrl(ssl->rbio, cmd, fp);
480 static int ssl_puts(BIO *bp, const char *str)
485 ret = BIO_write(bp, str, n);
489 BIO *BIO_new_buffer_ssl_connect(SSL_CTX *ctx)
491 #ifndef OPENSSL_NO_SOCK
492 BIO *ret = NULL, *buf = NULL, *ssl = NULL;
494 if ((buf = BIO_new(BIO_f_buffer())) == NULL)
496 if ((ssl = BIO_new_ssl_connect(ctx)) == NULL)
498 if ((ret = BIO_push(buf, ssl)) == NULL)
508 BIO *BIO_new_ssl_connect(SSL_CTX *ctx)
510 #ifndef OPENSSL_NO_SOCK
511 BIO *ret = NULL, *con = NULL, *ssl = NULL;
513 if ((con = BIO_new(BIO_s_connect())) == NULL)
515 if ((ssl = BIO_new_ssl(ctx, 1)) == NULL)
517 if ((ret = BIO_push(ssl, con)) == NULL)
526 BIO *BIO_new_ssl(SSL_CTX *ctx, int client)
531 if ((ret = BIO_new(BIO_f_ssl())) == NULL)
533 if ((ssl = SSL_new(ctx)) == NULL) {
538 SSL_set_connect_state(ssl);
540 SSL_set_accept_state(ssl);
542 BIO_set_ssl(ret, ssl, BIO_CLOSE);
546 int BIO_ssl_copy_session_id(BIO *t, BIO *f)
548 t = BIO_find_type(t, BIO_TYPE_SSL);
549 f = BIO_find_type(f, BIO_TYPE_SSL);
550 if ((t == NULL) || (f == NULL))
552 if ((((BIO_SSL *)t->ptr)->ssl == NULL) ||
553 (((BIO_SSL *)f->ptr)->ssl == NULL))
555 if (!SSL_copy_session_id(((BIO_SSL *)t->ptr)->ssl, ((BIO_SSL *)f->ptr)->ssl))
560 void BIO_ssl_shutdown(BIO *b)
565 if (b->method->type == BIO_TYPE_SSL) {
566 s = ((BIO_SSL *)b->ptr)->ssl;