1 /* Copyright (C) 1995-1998 Eric Young (eay@cryptsoft.com)
4 * This package is an SSL implementation written
5 * by Eric Young (eay@cryptsoft.com).
6 * The implementation was written so as to conform with Netscapes SSL.
8 * This library is free for commercial and non-commercial use as long as
9 * the following conditions are aheared to. The following conditions
10 * apply to all code found in this distribution, be it the RC4, RSA,
11 * lhash, DES, etc., code; not just the SSL code. The SSL documentation
12 * included with this distribution is covered by the same copyright terms
13 * except that the holder is Tim Hudson (tjh@cryptsoft.com).
15 * Copyright remains Eric Young's, and as such any Copyright notices in
16 * the code are not to be removed.
17 * If this package is used in a product, Eric Young should be given attribution
18 * as the author of the parts of the library used.
19 * This can be in the form of a textual message at program startup or
20 * in documentation (online or textual) provided with the package.
22 * Redistribution and use in source and binary forms, with or without
23 * modification, are permitted provided that the following conditions
25 * 1. Redistributions of source code must retain the copyright
26 * notice, this list of conditions and the following disclaimer.
27 * 2. Redistributions in binary form must reproduce the above copyright
28 * notice, this list of conditions and the following disclaimer in the
29 * documentation and/or other materials provided with the distribution.
30 * 3. All advertising materials mentioning features or use of this software
31 * must display the following acknowledgement:
32 * "This product includes cryptographic software written by
33 * Eric Young (eay@cryptsoft.com)"
34 * The word 'cryptographic' can be left out if the rouines from the library
35 * being used are not cryptographic related :-).
36 * 4. If you include any Windows specific code (or a derivative thereof) from
37 * the apps directory (application code) you must include an acknowledgement:
38 * "This product includes software written by Tim Hudson (tjh@cryptsoft.com)"
40 * THIS SOFTWARE IS PROVIDED BY ERIC YOUNG ``AS IS'' AND
41 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
42 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
43 * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
44 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
45 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
46 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
47 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
48 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
49 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
52 * The licence and distribution terms for any publically available version or
53 * derivative of this code cannot be changed. i.e. this code cannot simply be
54 * copied and put under another distribution licence
55 * [including the GNU Public Licence.]
62 #include <openssl/crypto.h>
63 #include <openssl/bio.h>
64 #include <openssl/err.h>
67 static int ssl_write(BIO *h, const char *buf, int num);
68 static int ssl_read(BIO *h, char *buf, int size);
69 static int ssl_puts(BIO *h, const char *str);
70 static long ssl_ctrl(BIO *h, int cmd, long arg1, void *arg2);
71 static int ssl_new(BIO *h);
72 static int ssl_free(BIO *data);
73 static long ssl_callback_ctrl(BIO *h, int cmd, bio_info_cb *fp);
74 typedef struct bio_ssl_st {
75 SSL *ssl; /* The ssl handle :-) */
76 /* re-negotiate every time the total number of bytes is this size */
78 unsigned long renegotiate_count;
79 unsigned long byte_count;
80 unsigned long renegotiate_timeout;
81 unsigned long last_time;
84 static BIO_METHOD methods_sslp = {
96 BIO_METHOD *BIO_f_ssl(void)
98 return (&methods_sslp);
101 static int ssl_new(BIO *bi)
103 BIO_SSL *bs = OPENSSL_zalloc(sizeof(*bs));
106 BIOerr(BIO_F_SSL_NEW, ERR_R_MALLOC_FAILURE);
110 bi->ptr = (char *)bs;
115 static int ssl_free(BIO *a)
121 bs = (BIO_SSL *)a->ptr;
123 SSL_shutdown(bs->ssl);
130 OPENSSL_free(a->ptr);
134 static int ssl_read(BIO *b, char *out, int outl)
139 int retry_reason = 0;
144 sb = (BIO_SSL *)b->ptr;
147 BIO_clear_retry_flags(b);
149 ret = SSL_read(ssl, out, outl);
151 switch (SSL_get_error(ssl, ret)) {
155 if (sb->renegotiate_count > 0) {
156 sb->byte_count += ret;
157 if (sb->byte_count > sb->renegotiate_count) {
159 sb->num_renegotiates++;
160 SSL_renegotiate(ssl);
164 if ((sb->renegotiate_timeout > 0) && (!r)) {
167 tm = (unsigned long)time(NULL);
168 if (tm > sb->last_time + sb->renegotiate_timeout) {
170 sb->num_renegotiates++;
171 SSL_renegotiate(ssl);
176 case SSL_ERROR_WANT_READ:
177 BIO_set_retry_read(b);
179 case SSL_ERROR_WANT_WRITE:
180 BIO_set_retry_write(b);
182 case SSL_ERROR_WANT_X509_LOOKUP:
183 BIO_set_retry_special(b);
184 retry_reason = BIO_RR_SSL_X509_LOOKUP;
186 case SSL_ERROR_WANT_ACCEPT:
187 BIO_set_retry_special(b);
188 retry_reason = BIO_RR_ACCEPT;
190 case SSL_ERROR_WANT_CONNECT:
191 BIO_set_retry_special(b);
192 retry_reason = BIO_RR_CONNECT;
194 case SSL_ERROR_SYSCALL:
196 case SSL_ERROR_ZERO_RETURN:
201 b->retry_reason = retry_reason;
205 static int ssl_write(BIO *b, const char *out, int outl)
208 int retry_reason = 0;
214 bs = (BIO_SSL *)b->ptr;
217 BIO_clear_retry_flags(b);
220 * ret=SSL_do_handshake(ssl); if (ret > 0)
222 ret = SSL_write(ssl, out, outl);
224 switch (SSL_get_error(ssl, ret)) {
228 if (bs->renegotiate_count > 0) {
229 bs->byte_count += ret;
230 if (bs->byte_count > bs->renegotiate_count) {
232 bs->num_renegotiates++;
233 SSL_renegotiate(ssl);
237 if ((bs->renegotiate_timeout > 0) && (!r)) {
240 tm = (unsigned long)time(NULL);
241 if (tm > bs->last_time + bs->renegotiate_timeout) {
243 bs->num_renegotiates++;
244 SSL_renegotiate(ssl);
248 case SSL_ERROR_WANT_WRITE:
249 BIO_set_retry_write(b);
251 case SSL_ERROR_WANT_READ:
252 BIO_set_retry_read(b);
254 case SSL_ERROR_WANT_X509_LOOKUP:
255 BIO_set_retry_special(b);
256 retry_reason = BIO_RR_SSL_X509_LOOKUP;
258 case SSL_ERROR_WANT_CONNECT:
259 BIO_set_retry_special(b);
260 retry_reason = BIO_RR_CONNECT;
261 case SSL_ERROR_SYSCALL:
267 b->retry_reason = retry_reason;
271 static long ssl_ctrl(BIO *b, int cmd, long num, void *ptr)
278 bs = (BIO_SSL *)b->ptr;
280 if ((ssl == NULL) && (cmd != BIO_C_SET_SSL))
286 if (ssl->handshake_func == ssl->method->ssl_connect)
287 SSL_set_connect_state(ssl);
288 else if (ssl->handshake_func == ssl->method->ssl_accept)
289 SSL_set_accept_state(ssl);
291 if (!SSL_clear(ssl)) {
296 if (b->next_bio != NULL)
297 ret = BIO_ctrl(b->next_bio, cmd, num, ptr);
298 else if (ssl->rbio != NULL)
299 ret = BIO_ctrl(ssl->rbio, cmd, num, ptr);
307 if (num) /* client mode */
308 SSL_set_connect_state(ssl);
310 SSL_set_accept_state(ssl);
312 case BIO_C_SET_SSL_RENEGOTIATE_TIMEOUT:
313 ret = bs->renegotiate_timeout;
316 bs->renegotiate_timeout = (unsigned long)num;
317 bs->last_time = (unsigned long)time(NULL);
319 case BIO_C_SET_SSL_RENEGOTIATE_BYTES:
320 ret = bs->renegotiate_count;
321 if ((long)num >= 512)
322 bs->renegotiate_count = (unsigned long)num;
324 case BIO_C_GET_SSL_NUM_RENEGOTIATES:
325 ret = bs->num_renegotiates;
333 b->shutdown = (int)num;
335 ((BIO_SSL *)b->ptr)->ssl = ssl;
336 bio = SSL_get_rbio(ssl);
338 if (b->next_bio != NULL)
339 BIO_push(bio, b->next_bio);
352 case BIO_CTRL_GET_CLOSE:
355 case BIO_CTRL_SET_CLOSE:
356 b->shutdown = (int)num;
358 case BIO_CTRL_WPENDING:
359 ret = BIO_ctrl(ssl->wbio, cmd, num, ptr);
361 case BIO_CTRL_PENDING:
362 ret = SSL_pending(ssl);
364 ret = BIO_pending(ssl->rbio);
367 BIO_clear_retry_flags(b);
368 ret = BIO_ctrl(ssl->wbio, cmd, num, ptr);
369 BIO_copy_next_retry(b);
372 if ((b->next_bio != NULL) && (b->next_bio != ssl->rbio)) {
373 SSL_set_bio(ssl, b->next_bio, b->next_bio);
378 /* Only detach if we are the BIO explicitly being popped */
381 * Shouldn't happen in practice because the rbio and wbio are the
384 if (ssl->rbio != ssl->wbio)
385 BIO_free_all(ssl->wbio);
386 if (b->next_bio != NULL)
387 BIO_free(b->next_bio);
392 case BIO_C_DO_STATE_MACHINE:
393 BIO_clear_retry_flags(b);
396 ret = (int)SSL_do_handshake(ssl);
398 switch (SSL_get_error(ssl, (int)ret)) {
399 case SSL_ERROR_WANT_READ:
400 BIO_set_flags(b, BIO_FLAGS_READ | BIO_FLAGS_SHOULD_RETRY);
402 case SSL_ERROR_WANT_WRITE:
403 BIO_set_flags(b, BIO_FLAGS_WRITE | BIO_FLAGS_SHOULD_RETRY);
405 case SSL_ERROR_WANT_CONNECT:
406 BIO_set_flags(b, BIO_FLAGS_IO_SPECIAL | BIO_FLAGS_SHOULD_RETRY);
407 b->retry_reason = b->next_bio->retry_reason;
409 case SSL_ERROR_WANT_X509_LOOKUP:
410 BIO_set_retry_special(b);
411 b->retry_reason = BIO_RR_SSL_X509_LOOKUP;
419 SSL_free(((BIO_SSL *)dbio->ptr)->ssl);
420 ((BIO_SSL *)dbio->ptr)->ssl = SSL_dup(ssl);
421 ((BIO_SSL *)dbio->ptr)->renegotiate_count =
422 ((BIO_SSL *)b->ptr)->renegotiate_count;
423 ((BIO_SSL *)dbio->ptr)->byte_count = ((BIO_SSL *)b->ptr)->byte_count;
424 ((BIO_SSL *)dbio->ptr)->renegotiate_timeout =
425 ((BIO_SSL *)b->ptr)->renegotiate_timeout;
426 ((BIO_SSL *)dbio->ptr)->last_time = ((BIO_SSL *)b->ptr)->last_time;
427 ret = (((BIO_SSL *)dbio->ptr)->ssl != NULL);
430 ret = BIO_ctrl(ssl->rbio, cmd, num, ptr);
432 case BIO_CTRL_SET_CALLBACK:
434 #if 0 /* FIXME: Should this be used? -- Richard
436 SSLerr(SSL_F_SSL_CTRL, ERR_R_SHOULD_NOT_HAVE_BEEN_CALLED);
443 case BIO_CTRL_GET_CALLBACK:
445 void (**fptr) (const SSL *xssl, int type, int val);
447 fptr = (void (**)(const SSL *xssl, int type, int val))ptr;
448 *fptr = SSL_get_info_callback(ssl);
452 ret = BIO_ctrl(ssl->rbio, cmd, num, ptr);
458 static long ssl_callback_ctrl(BIO *b, int cmd, bio_info_cb *fp)
464 bs = (BIO_SSL *)b->ptr;
467 case BIO_CTRL_SET_CALLBACK:
470 * FIXME: setting this via a completely different prototype seems
473 SSL_set_info_callback(ssl, (void (*)(const SSL *, int, int))fp);
477 ret = BIO_callback_ctrl(ssl->rbio, cmd, fp);
483 static int ssl_puts(BIO *bp, const char *str)
488 ret = BIO_write(bp, str, n);
492 BIO *BIO_new_buffer_ssl_connect(SSL_CTX *ctx)
494 #ifndef OPENSSL_NO_SOCK
495 BIO *ret = NULL, *buf = NULL, *ssl = NULL;
497 if ((buf = BIO_new(BIO_f_buffer())) == NULL)
499 if ((ssl = BIO_new_ssl_connect(ctx)) == NULL)
501 if ((ret = BIO_push(buf, ssl)) == NULL)
511 BIO *BIO_new_ssl_connect(SSL_CTX *ctx)
513 #ifndef OPENSSL_NO_SOCK
514 BIO *ret = NULL, *con = NULL, *ssl = NULL;
516 if ((con = BIO_new(BIO_s_connect())) == NULL)
518 if ((ssl = BIO_new_ssl(ctx, 1)) == NULL)
520 if ((ret = BIO_push(ssl, con)) == NULL)
529 BIO *BIO_new_ssl(SSL_CTX *ctx, int client)
534 if ((ret = BIO_new(BIO_f_ssl())) == NULL)
536 if ((ssl = SSL_new(ctx)) == NULL) {
541 SSL_set_connect_state(ssl);
543 SSL_set_accept_state(ssl);
545 BIO_set_ssl(ret, ssl, BIO_CLOSE);
549 int BIO_ssl_copy_session_id(BIO *t, BIO *f)
551 t = BIO_find_type(t, BIO_TYPE_SSL);
552 f = BIO_find_type(f, BIO_TYPE_SSL);
553 if ((t == NULL) || (f == NULL))
555 if ((((BIO_SSL *)t->ptr)->ssl == NULL) ||
556 (((BIO_SSL *)f->ptr)->ssl == NULL))
558 if (!SSL_copy_session_id(((BIO_SSL *)t->ptr)->ssl, ((BIO_SSL *)f->ptr)->ssl))
563 void BIO_ssl_shutdown(BIO *b)
568 if (b->method->type == BIO_TYPE_SSL) {
569 s = ((BIO_SSL *)b->ptr)->ssl;