2 * Copyright 1995-2016 The OpenSSL Project Authors. All Rights Reserved.
4 * Licensed under the OpenSSL license (the "License"). You may not use
5 * this file except in compliance with the License. You can obtain a copy
6 * in the file LICENSE in the source distribution or at
7 * https://www.openssl.org/source/license.html
14 #include <openssl/crypto.h>
15 #include "internal/bio.h"
16 #include <openssl/err.h>
19 static int ssl_write(BIO *h, const char *buf, size_t size, size_t *written);
20 static int ssl_read(BIO *b, char *buf, size_t size, size_t *readbytes);
21 static int ssl_puts(BIO *h, const char *str);
22 static long ssl_ctrl(BIO *h, int cmd, long arg1, void *arg2);
23 static int ssl_new(BIO *h);
24 static int ssl_free(BIO *data);
25 static long ssl_callback_ctrl(BIO *h, int cmd, bio_info_cb *fp);
26 typedef struct bio_ssl_st {
27 SSL *ssl; /* The ssl handle :-) */
28 /* re-negotiate every time the total number of bytes is this size */
30 unsigned long renegotiate_count;
32 unsigned long renegotiate_timeout;
33 unsigned long last_time;
36 static const BIO_METHOD methods_sslp = {
50 const BIO_METHOD *BIO_f_ssl(void)
52 return (&methods_sslp);
55 static int ssl_new(BIO *bi)
57 BIO_SSL *bs = OPENSSL_zalloc(sizeof(*bs));
60 BIOerr(BIO_F_SSL_NEW, ERR_R_MALLOC_FAILURE);
66 BIO_clear_flags(bi, ~0);
71 static int ssl_free(BIO *a)
79 SSL_shutdown(bs->ssl);
80 if (BIO_get_shutdown(a)) {
84 BIO_clear_flags(a, ~0);
91 static int ssl_read(BIO *b, char *buf, size_t size, size_t *readbytes)
101 sb = BIO_get_data(b);
104 BIO_clear_retry_flags(b);
106 ret = SSL_read_ex(ssl, buf, size, readbytes);
108 switch (SSL_get_error(ssl, ret)) {
110 if (sb->renegotiate_count > 0) {
111 sb->byte_count += *readbytes;
112 if (sb->byte_count > sb->renegotiate_count) {
114 sb->num_renegotiates++;
115 SSL_renegotiate(ssl);
119 if ((sb->renegotiate_timeout > 0) && (!r)) {
122 tm = (unsigned long)time(NULL);
123 if (tm > sb->last_time + sb->renegotiate_timeout) {
125 sb->num_renegotiates++;
126 SSL_renegotiate(ssl);
131 case SSL_ERROR_WANT_READ:
132 BIO_set_retry_read(b);
134 case SSL_ERROR_WANT_WRITE:
135 BIO_set_retry_write(b);
137 case SSL_ERROR_WANT_X509_LOOKUP:
138 BIO_set_retry_special(b);
139 retry_reason = BIO_RR_SSL_X509_LOOKUP;
141 case SSL_ERROR_WANT_ACCEPT:
142 BIO_set_retry_special(b);
143 retry_reason = BIO_RR_ACCEPT;
145 case SSL_ERROR_WANT_CONNECT:
146 BIO_set_retry_special(b);
147 retry_reason = BIO_RR_CONNECT;
149 case SSL_ERROR_SYSCALL:
151 case SSL_ERROR_ZERO_RETURN:
156 BIO_set_retry_reason(b, retry_reason);
161 static int ssl_write(BIO *b, const char *buf, size_t size, size_t *written)
164 int retry_reason = 0;
170 bs = BIO_get_data(b);
173 BIO_clear_retry_flags(b);
175 ret = SSL_write_ex(ssl, buf, size, written);
177 switch (SSL_get_error(ssl, ret)) {
179 if (bs->renegotiate_count > 0) {
180 bs->byte_count += *written;
181 if (bs->byte_count > bs->renegotiate_count) {
183 bs->num_renegotiates++;
184 SSL_renegotiate(ssl);
188 if ((bs->renegotiate_timeout > 0) && (!r)) {
191 tm = (unsigned long)time(NULL);
192 if (tm > bs->last_time + bs->renegotiate_timeout) {
194 bs->num_renegotiates++;
195 SSL_renegotiate(ssl);
199 case SSL_ERROR_WANT_WRITE:
200 BIO_set_retry_write(b);
202 case SSL_ERROR_WANT_READ:
203 BIO_set_retry_read(b);
205 case SSL_ERROR_WANT_X509_LOOKUP:
206 BIO_set_retry_special(b);
207 retry_reason = BIO_RR_SSL_X509_LOOKUP;
209 case SSL_ERROR_WANT_CONNECT:
210 BIO_set_retry_special(b);
211 retry_reason = BIO_RR_CONNECT;
212 case SSL_ERROR_SYSCALL:
218 BIO_set_retry_reason(b, retry_reason);
223 static long ssl_ctrl(BIO *b, int cmd, long num, void *ptr)
231 bs = BIO_get_data(b);
234 if ((ssl == NULL) && (cmd != BIO_C_SET_SSL))
240 if (ssl->handshake_func == ssl->method->ssl_connect)
241 SSL_set_connect_state(ssl);
242 else if (ssl->handshake_func == ssl->method->ssl_accept)
243 SSL_set_accept_state(ssl);
245 if (!SSL_clear(ssl)) {
251 ret = BIO_ctrl(next, cmd, num, ptr);
252 else if (ssl->rbio != NULL)
253 ret = BIO_ctrl(ssl->rbio, cmd, num, ptr);
261 if (num) /* client mode */
262 SSL_set_connect_state(ssl);
264 SSL_set_accept_state(ssl);
266 case BIO_C_SET_SSL_RENEGOTIATE_TIMEOUT:
267 ret = bs->renegotiate_timeout;
270 bs->renegotiate_timeout = (unsigned long)num;
271 bs->last_time = (unsigned long)time(NULL);
273 case BIO_C_SET_SSL_RENEGOTIATE_BYTES:
274 ret = bs->renegotiate_count;
275 if ((long)num >= 512)
276 bs->renegotiate_count = (unsigned long)num;
278 case BIO_C_GET_SSL_NUM_RENEGOTIATES:
279 ret = bs->num_renegotiates;
287 BIO_set_shutdown(b, num);
290 bio = SSL_get_rbio(ssl);
294 BIO_set_next(b, bio);
306 case BIO_CTRL_GET_CLOSE:
307 ret = BIO_get_shutdown(b);
309 case BIO_CTRL_SET_CLOSE:
310 BIO_set_shutdown(b, (int)num);
312 case BIO_CTRL_WPENDING:
313 ret = BIO_ctrl(ssl->wbio, cmd, num, ptr);
315 case BIO_CTRL_PENDING:
316 ret = SSL_pending(ssl);
318 ret = BIO_pending(ssl->rbio);
321 BIO_clear_retry_flags(b);
322 ret = BIO_ctrl(ssl->wbio, cmd, num, ptr);
323 BIO_copy_next_retry(b);
326 if ((next != NULL) && (next != ssl->rbio)) {
328 * We are going to pass ownership of next to the SSL object...but
329 * we don't own a reference to pass yet - so up ref
332 SSL_set_bio(ssl, next, next);
336 /* Only detach if we are the BIO explicitly being popped */
338 /* This will clear the reference we obtained during push */
339 SSL_set_bio(ssl, NULL, NULL);
342 case BIO_C_DO_STATE_MACHINE:
343 BIO_clear_retry_flags(b);
345 BIO_set_retry_reason(b, 0);
346 ret = (int)SSL_do_handshake(ssl);
348 switch (SSL_get_error(ssl, (int)ret)) {
349 case SSL_ERROR_WANT_READ:
350 BIO_set_flags(b, BIO_FLAGS_READ | BIO_FLAGS_SHOULD_RETRY);
352 case SSL_ERROR_WANT_WRITE:
353 BIO_set_flags(b, BIO_FLAGS_WRITE | BIO_FLAGS_SHOULD_RETRY);
355 case SSL_ERROR_WANT_CONNECT:
356 BIO_set_flags(b, BIO_FLAGS_IO_SPECIAL | BIO_FLAGS_SHOULD_RETRY);
357 BIO_set_retry_reason(b, BIO_get_retry_reason(next));
359 case SSL_ERROR_WANT_X509_LOOKUP:
360 BIO_set_retry_special(b);
361 BIO_set_retry_reason(b, BIO_RR_SSL_X509_LOOKUP);
369 dbs = BIO_get_data(dbio);
371 dbs->ssl = SSL_dup(ssl);
372 dbs->num_renegotiates = bs->num_renegotiates;
373 dbs->renegotiate_count = bs->renegotiate_count;
374 dbs->byte_count = bs->byte_count;
375 dbs->renegotiate_timeout = bs->renegotiate_timeout;
376 dbs->last_time = bs->last_time;
377 ret = (dbs->ssl != NULL);
380 ret = BIO_ctrl(ssl->rbio, cmd, num, ptr);
382 case BIO_CTRL_SET_CALLBACK:
384 #if 0 /* FIXME: Should this be used? -- Richard
386 SSLerr(SSL_F_SSL_CTRL, ERR_R_SHOULD_NOT_HAVE_BEEN_CALLED);
393 case BIO_CTRL_GET_CALLBACK:
395 void (**fptr) (const SSL *xssl, int type, int val);
397 fptr = (void (**)(const SSL *xssl, int type, int val))ptr;
398 *fptr = SSL_get_info_callback(ssl);
402 ret = BIO_ctrl(ssl->rbio, cmd, num, ptr);
408 static long ssl_callback_ctrl(BIO *b, int cmd, bio_info_cb *fp)
414 bs = BIO_get_data(b);
417 case BIO_CTRL_SET_CALLBACK:
420 * FIXME: setting this via a completely different prototype seems
423 SSL_set_info_callback(ssl, (void (*)(const SSL *, int, int))fp);
427 ret = BIO_callback_ctrl(ssl->rbio, cmd, fp);
433 static int ssl_puts(BIO *bp, const char *str)
438 ret = BIO_write(bp, str, n);
442 BIO *BIO_new_buffer_ssl_connect(SSL_CTX *ctx)
444 #ifndef OPENSSL_NO_SOCK
445 BIO *ret = NULL, *buf = NULL, *ssl = NULL;
447 if ((buf = BIO_new(BIO_f_buffer())) == NULL)
449 if ((ssl = BIO_new_ssl_connect(ctx)) == NULL)
451 if ((ret = BIO_push(buf, ssl)) == NULL)
461 BIO *BIO_new_ssl_connect(SSL_CTX *ctx)
463 #ifndef OPENSSL_NO_SOCK
464 BIO *ret = NULL, *con = NULL, *ssl = NULL;
466 if ((con = BIO_new(BIO_s_connect())) == NULL)
468 if ((ssl = BIO_new_ssl(ctx, 1)) == NULL)
470 if ((ret = BIO_push(ssl, con)) == NULL)
479 BIO *BIO_new_ssl(SSL_CTX *ctx, int client)
484 if ((ret = BIO_new(BIO_f_ssl())) == NULL)
486 if ((ssl = SSL_new(ctx)) == NULL) {
491 SSL_set_connect_state(ssl);
493 SSL_set_accept_state(ssl);
495 BIO_set_ssl(ret, ssl, BIO_CLOSE);
499 int BIO_ssl_copy_session_id(BIO *t, BIO *f)
501 BIO_SSL *tdata, *fdata;
502 t = BIO_find_type(t, BIO_TYPE_SSL);
503 f = BIO_find_type(f, BIO_TYPE_SSL);
504 if ((t == NULL) || (f == NULL))
506 tdata = BIO_get_data(t);
507 fdata = BIO_get_data(f);
508 if ((tdata->ssl == NULL) || (fdata->ssl == NULL))
510 if (!SSL_copy_session_id(tdata->ssl, (fdata->ssl)))
515 void BIO_ssl_shutdown(BIO *b)
519 b = BIO_find_type(b, BIO_TYPE_SSL);