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 = {
40 NULL, /* ssl_write_old, */
42 NULL, /* ssl_read_old, */
51 const BIO_METHOD *BIO_f_ssl(void)
56 static int ssl_new(BIO *bi)
58 BIO_SSL *bs = OPENSSL_zalloc(sizeof(*bs));
61 BIOerr(BIO_F_SSL_NEW, ERR_R_MALLOC_FAILURE);
67 BIO_clear_flags(bi, ~0);
72 static int ssl_free(BIO *a)
80 SSL_shutdown(bs->ssl);
81 if (BIO_get_shutdown(a)) {
85 BIO_clear_flags(a, ~0);
92 static int ssl_read(BIO *b, char *buf, size_t size, size_t *readbytes)
102 sb = BIO_get_data(b);
105 BIO_clear_retry_flags(b);
107 ret = ssl_read_internal(ssl, buf, size, readbytes);
109 switch (SSL_get_error(ssl, ret)) {
111 if (sb->renegotiate_count > 0) {
112 sb->byte_count += *readbytes;
113 if (sb->byte_count > sb->renegotiate_count) {
115 sb->num_renegotiates++;
116 SSL_renegotiate(ssl);
120 if ((sb->renegotiate_timeout > 0) && (!r)) {
123 tm = (unsigned long)time(NULL);
124 if (tm > sb->last_time + sb->renegotiate_timeout) {
126 sb->num_renegotiates++;
127 SSL_renegotiate(ssl);
132 case SSL_ERROR_WANT_READ:
133 BIO_set_retry_read(b);
135 case SSL_ERROR_WANT_WRITE:
136 BIO_set_retry_write(b);
138 case SSL_ERROR_WANT_X509_LOOKUP:
139 BIO_set_retry_special(b);
140 retry_reason = BIO_RR_SSL_X509_LOOKUP;
142 case SSL_ERROR_WANT_ACCEPT:
143 BIO_set_retry_special(b);
144 retry_reason = BIO_RR_ACCEPT;
146 case SSL_ERROR_WANT_CONNECT:
147 BIO_set_retry_special(b);
148 retry_reason = BIO_RR_CONNECT;
150 case SSL_ERROR_SYSCALL:
152 case SSL_ERROR_ZERO_RETURN:
157 BIO_set_retry_reason(b, retry_reason);
162 static int ssl_write(BIO *b, const char *buf, size_t size, size_t *written)
165 int retry_reason = 0;
171 bs = BIO_get_data(b);
174 BIO_clear_retry_flags(b);
176 ret = ssl_write_internal(ssl, buf, size, written);
178 switch (SSL_get_error(ssl, ret)) {
180 if (bs->renegotiate_count > 0) {
181 bs->byte_count += *written;
182 if (bs->byte_count > bs->renegotiate_count) {
184 bs->num_renegotiates++;
185 SSL_renegotiate(ssl);
189 if ((bs->renegotiate_timeout > 0) && (!r)) {
192 tm = (unsigned long)time(NULL);
193 if (tm > bs->last_time + bs->renegotiate_timeout) {
195 bs->num_renegotiates++;
196 SSL_renegotiate(ssl);
200 case SSL_ERROR_WANT_WRITE:
201 BIO_set_retry_write(b);
203 case SSL_ERROR_WANT_READ:
204 BIO_set_retry_read(b);
206 case SSL_ERROR_WANT_X509_LOOKUP:
207 BIO_set_retry_special(b);
208 retry_reason = BIO_RR_SSL_X509_LOOKUP;
210 case SSL_ERROR_WANT_CONNECT:
211 BIO_set_retry_special(b);
212 retry_reason = BIO_RR_CONNECT;
213 case SSL_ERROR_SYSCALL:
219 BIO_set_retry_reason(b, retry_reason);
224 static long ssl_ctrl(BIO *b, int cmd, long num, void *ptr)
232 bs = BIO_get_data(b);
235 if ((ssl == NULL) && (cmd != BIO_C_SET_SSL))
241 if (ssl->handshake_func == ssl->method->ssl_connect)
242 SSL_set_connect_state(ssl);
243 else if (ssl->handshake_func == ssl->method->ssl_accept)
244 SSL_set_accept_state(ssl);
246 if (!SSL_clear(ssl)) {
252 ret = BIO_ctrl(next, cmd, num, ptr);
253 else if (ssl->rbio != NULL)
254 ret = BIO_ctrl(ssl->rbio, cmd, num, ptr);
262 if (num) /* client mode */
263 SSL_set_connect_state(ssl);
265 SSL_set_accept_state(ssl);
267 case BIO_C_SET_SSL_RENEGOTIATE_TIMEOUT:
268 ret = bs->renegotiate_timeout;
271 bs->renegotiate_timeout = (unsigned long)num;
272 bs->last_time = (unsigned long)time(NULL);
274 case BIO_C_SET_SSL_RENEGOTIATE_BYTES:
275 ret = bs->renegotiate_count;
276 if ((long)num >= 512)
277 bs->renegotiate_count = (unsigned long)num;
279 case BIO_C_GET_SSL_NUM_RENEGOTIATES:
280 ret = bs->num_renegotiates;
288 BIO_set_shutdown(b, num);
291 bio = SSL_get_rbio(ssl);
295 BIO_set_next(b, bio);
307 case BIO_CTRL_GET_CLOSE:
308 ret = BIO_get_shutdown(b);
310 case BIO_CTRL_SET_CLOSE:
311 BIO_set_shutdown(b, (int)num);
313 case BIO_CTRL_WPENDING:
314 ret = BIO_ctrl(ssl->wbio, cmd, num, ptr);
316 case BIO_CTRL_PENDING:
317 ret = SSL_pending(ssl);
319 ret = BIO_pending(ssl->rbio);
322 BIO_clear_retry_flags(b);
323 ret = BIO_ctrl(ssl->wbio, cmd, num, ptr);
324 BIO_copy_next_retry(b);
327 if ((next != NULL) && (next != ssl->rbio)) {
329 * We are going to pass ownership of next to the SSL object...but
330 * we don't own a reference to pass yet - so up ref
333 SSL_set_bio(ssl, next, next);
337 /* Only detach if we are the BIO explicitly being popped */
339 /* This will clear the reference we obtained during push */
340 SSL_set_bio(ssl, NULL, NULL);
343 case BIO_C_DO_STATE_MACHINE:
344 BIO_clear_retry_flags(b);
346 BIO_set_retry_reason(b, 0);
347 ret = (int)SSL_do_handshake(ssl);
349 switch (SSL_get_error(ssl, (int)ret)) {
350 case SSL_ERROR_WANT_READ:
351 BIO_set_flags(b, BIO_FLAGS_READ | BIO_FLAGS_SHOULD_RETRY);
353 case SSL_ERROR_WANT_WRITE:
354 BIO_set_flags(b, BIO_FLAGS_WRITE | BIO_FLAGS_SHOULD_RETRY);
356 case SSL_ERROR_WANT_CONNECT:
357 BIO_set_flags(b, BIO_FLAGS_IO_SPECIAL | BIO_FLAGS_SHOULD_RETRY);
358 BIO_set_retry_reason(b, BIO_get_retry_reason(next));
360 case SSL_ERROR_WANT_X509_LOOKUP:
361 BIO_set_retry_special(b);
362 BIO_set_retry_reason(b, BIO_RR_SSL_X509_LOOKUP);
370 dbs = BIO_get_data(dbio);
372 dbs->ssl = SSL_dup(ssl);
373 dbs->num_renegotiates = bs->num_renegotiates;
374 dbs->renegotiate_count = bs->renegotiate_count;
375 dbs->byte_count = bs->byte_count;
376 dbs->renegotiate_timeout = bs->renegotiate_timeout;
377 dbs->last_time = bs->last_time;
378 ret = (dbs->ssl != NULL);
381 ret = BIO_ctrl(ssl->rbio, cmd, num, ptr);
383 case BIO_CTRL_SET_CALLBACK:
384 ret = 0; /* use callback ctrl */
387 ret = BIO_ctrl(ssl->rbio, cmd, num, ptr);
393 static long ssl_callback_ctrl(BIO *b, int cmd, BIO_info_cb *fp)
399 bs = BIO_get_data(b);
402 case BIO_CTRL_SET_CALLBACK:
403 ret = BIO_callback_ctrl(ssl->rbio, cmd, fp);
412 static int ssl_puts(BIO *bp, const char *str)
417 ret = BIO_write(bp, str, n);
421 BIO *BIO_new_buffer_ssl_connect(SSL_CTX *ctx)
423 #ifndef OPENSSL_NO_SOCK
424 BIO *ret = NULL, *buf = NULL, *ssl = NULL;
426 if ((buf = BIO_new(BIO_f_buffer())) == NULL)
428 if ((ssl = BIO_new_ssl_connect(ctx)) == NULL)
430 if ((ret = BIO_push(buf, ssl)) == NULL)
440 BIO *BIO_new_ssl_connect(SSL_CTX *ctx)
442 #ifndef OPENSSL_NO_SOCK
443 BIO *ret = NULL, *con = NULL, *ssl = NULL;
445 if ((con = BIO_new(BIO_s_connect())) == NULL)
447 if ((ssl = BIO_new_ssl(ctx, 1)) == NULL)
449 if ((ret = BIO_push(ssl, con)) == NULL)
458 BIO *BIO_new_ssl(SSL_CTX *ctx, int client)
463 if ((ret = BIO_new(BIO_f_ssl())) == NULL)
465 if ((ssl = SSL_new(ctx)) == NULL) {
470 SSL_set_connect_state(ssl);
472 SSL_set_accept_state(ssl);
474 BIO_set_ssl(ret, ssl, BIO_CLOSE);
478 int BIO_ssl_copy_session_id(BIO *t, BIO *f)
480 BIO_SSL *tdata, *fdata;
481 t = BIO_find_type(t, BIO_TYPE_SSL);
482 f = BIO_find_type(f, BIO_TYPE_SSL);
483 if ((t == NULL) || (f == NULL))
485 tdata = BIO_get_data(t);
486 fdata = BIO_get_data(f);
487 if ((tdata->ssl == NULL) || (fdata->ssl == NULL))
489 if (!SSL_copy_session_id(tdata->ssl, (fdata->ssl)))
494 void BIO_ssl_shutdown(BIO *b)
498 for (; b != NULL; b = BIO_next(b)) {
499 if (BIO_method_type(b) != BIO_TYPE_SSL)
501 bdata = BIO_get_data(b);
502 if (bdata != NULL && bdata->ssl != NULL)
503 SSL_shutdown(bdata->ssl);