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>
66 #include <openssl/ssl.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);
154 if (!SSL_is_init_finished(ssl)) {
155 /* ret=SSL_do_handshake(ssl); */
158 outflags = (BIO_FLAGS_READ | BIO_FLAGS_SHOULD_RETRY);
165 ret = SSL_read(ssl, out, outl);
167 switch (SSL_get_error(ssl, ret)) {
171 if (sb->renegotiate_count > 0) {
172 sb->byte_count += ret;
173 if (sb->byte_count > sb->renegotiate_count) {
175 sb->num_renegotiates++;
176 SSL_renegotiate(ssl);
180 if ((sb->renegotiate_timeout > 0) && (!r)) {
183 tm = (unsigned long)time(NULL);
184 if (tm > sb->last_time + sb->renegotiate_timeout) {
186 sb->num_renegotiates++;
187 SSL_renegotiate(ssl);
192 case SSL_ERROR_WANT_READ:
193 BIO_set_retry_read(b);
195 case SSL_ERROR_WANT_WRITE:
196 BIO_set_retry_write(b);
198 case SSL_ERROR_WANT_X509_LOOKUP:
199 BIO_set_retry_special(b);
200 retry_reason = BIO_RR_SSL_X509_LOOKUP;
202 case SSL_ERROR_WANT_ACCEPT:
203 BIO_set_retry_special(b);
204 retry_reason = BIO_RR_ACCEPT;
206 case SSL_ERROR_WANT_CONNECT:
207 BIO_set_retry_special(b);
208 retry_reason = BIO_RR_CONNECT;
210 case SSL_ERROR_SYSCALL:
212 case SSL_ERROR_ZERO_RETURN:
217 b->retry_reason = retry_reason;
221 static int ssl_write(BIO *b, const char *out, int outl)
224 int retry_reason = 0;
230 bs = (BIO_SSL *)b->ptr;
233 BIO_clear_retry_flags(b);
236 * ret=SSL_do_handshake(ssl); if (ret > 0)
238 ret = SSL_write(ssl, out, outl);
240 switch (SSL_get_error(ssl, ret)) {
244 if (bs->renegotiate_count > 0) {
245 bs->byte_count += ret;
246 if (bs->byte_count > bs->renegotiate_count) {
248 bs->num_renegotiates++;
249 SSL_renegotiate(ssl);
253 if ((bs->renegotiate_timeout > 0) && (!r)) {
256 tm = (unsigned long)time(NULL);
257 if (tm > bs->last_time + bs->renegotiate_timeout) {
259 bs->num_renegotiates++;
260 SSL_renegotiate(ssl);
264 case SSL_ERROR_WANT_WRITE:
265 BIO_set_retry_write(b);
267 case SSL_ERROR_WANT_READ:
268 BIO_set_retry_read(b);
270 case SSL_ERROR_WANT_X509_LOOKUP:
271 BIO_set_retry_special(b);
272 retry_reason = BIO_RR_SSL_X509_LOOKUP;
274 case SSL_ERROR_WANT_CONNECT:
275 BIO_set_retry_special(b);
276 retry_reason = BIO_RR_CONNECT;
277 case SSL_ERROR_SYSCALL:
283 b->retry_reason = retry_reason;
287 static long ssl_ctrl(BIO *b, int cmd, long num, void *ptr)
294 bs = (BIO_SSL *)b->ptr;
296 if ((ssl == NULL) && (cmd != BIO_C_SET_SSL))
302 if (ssl->handshake_func == ssl->method->ssl_connect)
303 SSL_set_connect_state(ssl);
304 else if (ssl->handshake_func == ssl->method->ssl_accept)
305 SSL_set_accept_state(ssl);
309 if (b->next_bio != NULL)
310 ret = BIO_ctrl(b->next_bio, cmd, num, ptr);
311 else if (ssl->rbio != NULL)
312 ret = BIO_ctrl(ssl->rbio, cmd, num, ptr);
320 if (num) /* client mode */
321 SSL_set_connect_state(ssl);
323 SSL_set_accept_state(ssl);
325 case BIO_C_SET_SSL_RENEGOTIATE_TIMEOUT:
326 ret = bs->renegotiate_timeout;
329 bs->renegotiate_timeout = (unsigned long)num;
330 bs->last_time = (unsigned long)time(NULL);
332 case BIO_C_SET_SSL_RENEGOTIATE_BYTES:
333 ret = bs->renegotiate_count;
334 if ((long)num >= 512)
335 bs->renegotiate_count = (unsigned long)num;
337 case BIO_C_GET_SSL_NUM_RENEGOTIATES:
338 ret = bs->num_renegotiates;
346 b->shutdown = (int)num;
348 ((BIO_SSL *)b->ptr)->ssl = ssl;
349 bio = SSL_get_rbio(ssl);
351 if (b->next_bio != NULL)
352 BIO_push(bio, b->next_bio);
354 CRYPTO_add(&bio->references, 1, CRYPTO_LOCK_BIO);
365 case BIO_CTRL_GET_CLOSE:
368 case BIO_CTRL_SET_CLOSE:
369 b->shutdown = (int)num;
371 case BIO_CTRL_WPENDING:
372 ret = BIO_ctrl(ssl->wbio, cmd, num, ptr);
374 case BIO_CTRL_PENDING:
375 ret = SSL_pending(ssl);
377 ret = BIO_pending(ssl->rbio);
380 BIO_clear_retry_flags(b);
381 ret = BIO_ctrl(ssl->wbio, cmd, num, ptr);
382 BIO_copy_next_retry(b);
385 if ((b->next_bio != NULL) && (b->next_bio != ssl->rbio)) {
386 SSL_set_bio(ssl, b->next_bio, b->next_bio);
387 CRYPTO_add(&b->next_bio->references, 1, CRYPTO_LOCK_BIO);
391 /* Only detach if we are the BIO explicitly being popped */
394 * Shouldn't happen in practice because the rbio and wbio are the
397 if (ssl->rbio != ssl->wbio)
398 BIO_free_all(ssl->wbio);
399 if (b->next_bio != NULL)
400 CRYPTO_add(&b->next_bio->references, -1, CRYPTO_LOCK_BIO);
405 case BIO_C_DO_STATE_MACHINE:
406 BIO_clear_retry_flags(b);
409 ret = (int)SSL_do_handshake(ssl);
411 switch (SSL_get_error(ssl, (int)ret)) {
412 case SSL_ERROR_WANT_READ:
413 BIO_set_flags(b, BIO_FLAGS_READ | BIO_FLAGS_SHOULD_RETRY);
415 case SSL_ERROR_WANT_WRITE:
416 BIO_set_flags(b, BIO_FLAGS_WRITE | BIO_FLAGS_SHOULD_RETRY);
418 case SSL_ERROR_WANT_CONNECT:
419 BIO_set_flags(b, BIO_FLAGS_IO_SPECIAL | BIO_FLAGS_SHOULD_RETRY);
420 b->retry_reason = b->next_bio->retry_reason;
428 if (((BIO_SSL *)dbio->ptr)->ssl != NULL)
429 SSL_free(((BIO_SSL *)dbio->ptr)->ssl);
430 ((BIO_SSL *)dbio->ptr)->ssl = SSL_dup(ssl);
431 ((BIO_SSL *)dbio->ptr)->renegotiate_count =
432 ((BIO_SSL *)b->ptr)->renegotiate_count;
433 ((BIO_SSL *)dbio->ptr)->byte_count = ((BIO_SSL *)b->ptr)->byte_count;
434 ((BIO_SSL *)dbio->ptr)->renegotiate_timeout =
435 ((BIO_SSL *)b->ptr)->renegotiate_timeout;
436 ((BIO_SSL *)dbio->ptr)->last_time = ((BIO_SSL *)b->ptr)->last_time;
437 ret = (((BIO_SSL *)dbio->ptr)->ssl != NULL);
440 ret = BIO_ctrl(ssl->rbio, cmd, num, ptr);
442 case BIO_CTRL_SET_CALLBACK:
444 #if 0 /* FIXME: Should this be used? -- Richard
446 SSLerr(SSL_F_SSL_CTRL, ERR_R_SHOULD_NOT_HAVE_BEEN_CALLED);
453 case BIO_CTRL_GET_CALLBACK:
455 void (**fptr) (const SSL *xssl, int type, int val);
457 fptr = (void (**)(const SSL *xssl, int type, int val))ptr;
458 *fptr = SSL_get_info_callback(ssl);
462 ret = BIO_ctrl(ssl->rbio, cmd, num, ptr);
468 static long ssl_callback_ctrl(BIO *b, int cmd, bio_info_cb *fp)
474 bs = (BIO_SSL *)b->ptr;
477 case BIO_CTRL_SET_CALLBACK:
480 * FIXME: setting this via a completely different prototype seems
483 SSL_set_info_callback(ssl, (void (*)(const SSL *, int, int))fp);
487 ret = BIO_callback_ctrl(ssl->rbio, cmd, fp);
493 static int ssl_puts(BIO *bp, const char *str)
498 ret = BIO_write(bp, str, n);
502 BIO *BIO_new_buffer_ssl_connect(SSL_CTX *ctx)
504 #ifndef OPENSSL_NO_SOCK
505 BIO *ret = NULL, *buf = NULL, *ssl = NULL;
507 if ((buf = BIO_new(BIO_f_buffer())) == NULL)
509 if ((ssl = BIO_new_ssl_connect(ctx)) == NULL)
511 if ((ret = BIO_push(buf, ssl)) == NULL)
523 BIO *BIO_new_ssl_connect(SSL_CTX *ctx)
525 #ifndef OPENSSL_NO_SOCK
526 BIO *ret = NULL, *con = NULL, *ssl = NULL;
528 if ((con = BIO_new(BIO_s_connect())) == NULL)
530 if ((ssl = BIO_new_ssl(ctx, 1)) == NULL)
532 if ((ret = BIO_push(ssl, con)) == NULL)
542 BIO *BIO_new_ssl(SSL_CTX *ctx, int client)
547 if ((ret = BIO_new(BIO_f_ssl())) == NULL)
549 if ((ssl = SSL_new(ctx)) == NULL) {
554 SSL_set_connect_state(ssl);
556 SSL_set_accept_state(ssl);
558 BIO_set_ssl(ret, ssl, BIO_CLOSE);
562 int BIO_ssl_copy_session_id(BIO *t, BIO *f)
564 t = BIO_find_type(t, BIO_TYPE_SSL);
565 f = BIO_find_type(f, BIO_TYPE_SSL);
566 if ((t == NULL) || (f == NULL))
568 if ((((BIO_SSL *)t->ptr)->ssl == NULL) ||
569 (((BIO_SSL *)f->ptr)->ssl == NULL))
571 SSL_copy_session_id(((BIO_SSL *)t->ptr)->ssl, ((BIO_SSL *)f->ptr)->ssl);
575 void BIO_ssl_shutdown(BIO *b)
580 if (b->method->type == BIO_TYPE_SSL) {
581 s = ((BIO_SSL *)b->ptr)->ssl;