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 = 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);
133 OPENSSL_free(a->ptr);
137 static int ssl_read(BIO *b, char *out, int outl)
142 int retry_reason = 0;
147 sb = (BIO_SSL *)b->ptr;
150 BIO_clear_retry_flags(b);
152 ret = SSL_read(ssl, out, outl);
154 switch (SSL_get_error(ssl, ret)) {
158 if (sb->renegotiate_count > 0) {
159 sb->byte_count += ret;
160 if (sb->byte_count > sb->renegotiate_count) {
162 sb->num_renegotiates++;
163 SSL_renegotiate(ssl);
167 if ((sb->renegotiate_timeout > 0) && (!r)) {
170 tm = (unsigned long)time(NULL);
171 if (tm > sb->last_time + sb->renegotiate_timeout) {
173 sb->num_renegotiates++;
174 SSL_renegotiate(ssl);
179 case SSL_ERROR_WANT_READ:
180 BIO_set_retry_read(b);
182 case SSL_ERROR_WANT_WRITE:
183 BIO_set_retry_write(b);
185 case SSL_ERROR_WANT_X509_LOOKUP:
186 BIO_set_retry_special(b);
187 retry_reason = BIO_RR_SSL_X509_LOOKUP;
189 case SSL_ERROR_WANT_ACCEPT:
190 BIO_set_retry_special(b);
191 retry_reason = BIO_RR_ACCEPT;
193 case SSL_ERROR_WANT_CONNECT:
194 BIO_set_retry_special(b);
195 retry_reason = BIO_RR_CONNECT;
197 case SSL_ERROR_SYSCALL:
199 case SSL_ERROR_ZERO_RETURN:
204 b->retry_reason = retry_reason;
208 static int ssl_write(BIO *b, const char *out, int outl)
211 int retry_reason = 0;
217 bs = (BIO_SSL *)b->ptr;
220 BIO_clear_retry_flags(b);
223 * ret=SSL_do_handshake(ssl); if (ret > 0)
225 ret = SSL_write(ssl, out, outl);
227 switch (SSL_get_error(ssl, ret)) {
231 if (bs->renegotiate_count > 0) {
232 bs->byte_count += ret;
233 if (bs->byte_count > bs->renegotiate_count) {
235 bs->num_renegotiates++;
236 SSL_renegotiate(ssl);
240 if ((bs->renegotiate_timeout > 0) && (!r)) {
243 tm = (unsigned long)time(NULL);
244 if (tm > bs->last_time + bs->renegotiate_timeout) {
246 bs->num_renegotiates++;
247 SSL_renegotiate(ssl);
251 case SSL_ERROR_WANT_WRITE:
252 BIO_set_retry_write(b);
254 case SSL_ERROR_WANT_READ:
255 BIO_set_retry_read(b);
257 case SSL_ERROR_WANT_X509_LOOKUP:
258 BIO_set_retry_special(b);
259 retry_reason = BIO_RR_SSL_X509_LOOKUP;
261 case SSL_ERROR_WANT_CONNECT:
262 BIO_set_retry_special(b);
263 retry_reason = BIO_RR_CONNECT;
264 case SSL_ERROR_SYSCALL:
270 b->retry_reason = retry_reason;
274 static long ssl_ctrl(BIO *b, int cmd, long num, void *ptr)
281 bs = (BIO_SSL *)b->ptr;
283 if ((ssl == NULL) && (cmd != BIO_C_SET_SSL))
289 if (ssl->handshake_func == ssl->method->ssl_connect)
290 SSL_set_connect_state(ssl);
291 else if (ssl->handshake_func == ssl->method->ssl_accept)
292 SSL_set_accept_state(ssl);
294 if (!SSL_clear(ssl)) {
299 if (b->next_bio != NULL)
300 ret = BIO_ctrl(b->next_bio, cmd, num, ptr);
301 else if (ssl->rbio != NULL)
302 ret = BIO_ctrl(ssl->rbio, cmd, num, ptr);
310 if (num) /* client mode */
311 SSL_set_connect_state(ssl);
313 SSL_set_accept_state(ssl);
315 case BIO_C_SET_SSL_RENEGOTIATE_TIMEOUT:
316 ret = bs->renegotiate_timeout;
319 bs->renegotiate_timeout = (unsigned long)num;
320 bs->last_time = (unsigned long)time(NULL);
322 case BIO_C_SET_SSL_RENEGOTIATE_BYTES:
323 ret = bs->renegotiate_count;
324 if ((long)num >= 512)
325 bs->renegotiate_count = (unsigned long)num;
327 case BIO_C_GET_SSL_NUM_RENEGOTIATES:
328 ret = bs->num_renegotiates;
336 b->shutdown = (int)num;
338 ((BIO_SSL *)b->ptr)->ssl = ssl;
339 bio = SSL_get_rbio(ssl);
341 if (b->next_bio != NULL)
342 BIO_push(bio, b->next_bio);
344 CRYPTO_add(&bio->references, 1, CRYPTO_LOCK_BIO);
355 case BIO_CTRL_GET_CLOSE:
358 case BIO_CTRL_SET_CLOSE:
359 b->shutdown = (int)num;
361 case BIO_CTRL_WPENDING:
362 ret = BIO_ctrl(ssl->wbio, cmd, num, ptr);
364 case BIO_CTRL_PENDING:
365 ret = SSL_pending(ssl);
367 ret = BIO_pending(ssl->rbio);
370 BIO_clear_retry_flags(b);
371 ret = BIO_ctrl(ssl->wbio, cmd, num, ptr);
372 BIO_copy_next_retry(b);
375 if ((b->next_bio != NULL) && (b->next_bio != ssl->rbio)) {
376 SSL_set_bio(ssl, b->next_bio, b->next_bio);
377 CRYPTO_add(&b->next_bio->references, 1, CRYPTO_LOCK_BIO);
381 /* Only detach if we are the BIO explicitly being popped */
384 * Shouldn't happen in practice because the rbio and wbio are the
387 if (ssl->rbio != ssl->wbio)
388 BIO_free_all(ssl->wbio);
389 if (b->next_bio != NULL)
390 CRYPTO_add(&b->next_bio->references, -1, CRYPTO_LOCK_BIO);
395 case BIO_C_DO_STATE_MACHINE:
396 BIO_clear_retry_flags(b);
399 ret = (int)SSL_do_handshake(ssl);
401 switch (SSL_get_error(ssl, (int)ret)) {
402 case SSL_ERROR_WANT_READ:
403 BIO_set_flags(b, BIO_FLAGS_READ | BIO_FLAGS_SHOULD_RETRY);
405 case SSL_ERROR_WANT_WRITE:
406 BIO_set_flags(b, BIO_FLAGS_WRITE | BIO_FLAGS_SHOULD_RETRY);
408 case SSL_ERROR_WANT_CONNECT:
409 BIO_set_flags(b, BIO_FLAGS_IO_SPECIAL | BIO_FLAGS_SHOULD_RETRY);
410 b->retry_reason = b->next_bio->retry_reason;
418 SSL_free(((BIO_SSL *)dbio->ptr)->ssl);
419 ((BIO_SSL *)dbio->ptr)->ssl = SSL_dup(ssl);
420 ((BIO_SSL *)dbio->ptr)->renegotiate_count =
421 ((BIO_SSL *)b->ptr)->renegotiate_count;
422 ((BIO_SSL *)dbio->ptr)->byte_count = ((BIO_SSL *)b->ptr)->byte_count;
423 ((BIO_SSL *)dbio->ptr)->renegotiate_timeout =
424 ((BIO_SSL *)b->ptr)->renegotiate_timeout;
425 ((BIO_SSL *)dbio->ptr)->last_time = ((BIO_SSL *)b->ptr)->last_time;
426 ret = (((BIO_SSL *)dbio->ptr)->ssl != NULL);
429 ret = BIO_ctrl(ssl->rbio, cmd, num, ptr);
431 case BIO_CTRL_SET_CALLBACK:
433 #if 0 /* FIXME: Should this be used? -- Richard
435 SSLerr(SSL_F_SSL_CTRL, ERR_R_SHOULD_NOT_HAVE_BEEN_CALLED);
442 case BIO_CTRL_GET_CALLBACK:
444 void (**fptr) (const SSL *xssl, int type, int val);
446 fptr = (void (**)(const SSL *xssl, int type, int val))ptr;
447 *fptr = SSL_get_info_callback(ssl);
451 ret = BIO_ctrl(ssl->rbio, cmd, num, ptr);
457 static long ssl_callback_ctrl(BIO *b, int cmd, bio_info_cb *fp)
463 bs = (BIO_SSL *)b->ptr;
466 case BIO_CTRL_SET_CALLBACK:
469 * FIXME: setting this via a completely different prototype seems
472 SSL_set_info_callback(ssl, (void (*)(const SSL *, int, int))fp);
476 ret = BIO_callback_ctrl(ssl->rbio, cmd, fp);
482 static int ssl_puts(BIO *bp, const char *str)
487 ret = BIO_write(bp, str, n);
491 BIO *BIO_new_buffer_ssl_connect(SSL_CTX *ctx)
493 #ifndef OPENSSL_NO_SOCK
494 BIO *ret = NULL, *buf = NULL, *ssl = NULL;
496 if ((buf = BIO_new(BIO_f_buffer())) == NULL)
498 if ((ssl = BIO_new_ssl_connect(ctx)) == NULL)
500 if ((ret = BIO_push(buf, ssl)) == NULL)
510 BIO *BIO_new_ssl_connect(SSL_CTX *ctx)
512 #ifndef OPENSSL_NO_SOCK
513 BIO *ret = NULL, *con = NULL, *ssl = NULL;
515 if ((con = BIO_new(BIO_s_connect())) == NULL)
517 if ((ssl = BIO_new_ssl(ctx, 1)) == NULL)
519 if ((ret = BIO_push(ssl, con)) == NULL)
528 BIO *BIO_new_ssl(SSL_CTX *ctx, int client)
533 if ((ret = BIO_new(BIO_f_ssl())) == NULL)
535 if ((ssl = SSL_new(ctx)) == NULL) {
540 SSL_set_connect_state(ssl);
542 SSL_set_accept_state(ssl);
544 BIO_set_ssl(ret, ssl, BIO_CLOSE);
548 int BIO_ssl_copy_session_id(BIO *t, BIO *f)
550 t = BIO_find_type(t, BIO_TYPE_SSL);
551 f = BIO_find_type(f, BIO_TYPE_SSL);
552 if ((t == NULL) || (f == NULL))
554 if ((((BIO_SSL *)t->ptr)->ssl == NULL) ||
555 (((BIO_SSL *)f->ptr)->ssl == NULL))
557 if (!SSL_copy_session_id(((BIO_SSL *)t->ptr)->ssl, ((BIO_SSL *)f->ptr)->ssl))
562 void BIO_ssl_shutdown(BIO *b)
567 if (b->method->type == BIO_TYPE_SSL) {
568 s = ((BIO_SSL *)b->ptr)->ssl;