2 * Copyright 1995-2017 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, int num);
20 static int ssl_read(BIO *h, char *buf, int size);
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;
31 unsigned long byte_count;
32 unsigned long renegotiate_timeout;
33 unsigned long last_time;
36 static const BIO_METHOD methods_sslp = {
49 const BIO_METHOD *BIO_f_ssl(void)
51 return (&methods_sslp);
54 static int ssl_new(BIO *bi)
56 BIO_SSL *bs = OPENSSL_zalloc(sizeof(*bs));
59 BIOerr(BIO_F_SSL_NEW, ERR_R_MALLOC_FAILURE);
65 BIO_clear_flags(bi, ~0);
70 static int ssl_free(BIO *a)
78 SSL_shutdown(bs->ssl);
79 if (BIO_get_shutdown(a)) {
83 BIO_clear_flags(a, ~0);
90 static int ssl_read(BIO *b, char *out, int outl)
100 sb = BIO_get_data(b);
103 BIO_clear_retry_flags(b);
105 ret = SSL_read(ssl, out, outl);
107 switch (SSL_get_error(ssl, ret)) {
111 if (sb->renegotiate_count > 0) {
112 sb->byte_count += ret;
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);
161 static int ssl_write(BIO *b, const char *out, int outl)
164 int retry_reason = 0;
170 bs = BIO_get_data(b);
173 BIO_clear_retry_flags(b);
176 * ret=SSL_do_handshake(ssl); if (ret > 0)
178 ret = SSL_write(ssl, out, outl);
180 switch (SSL_get_error(ssl, ret)) {
184 if (bs->renegotiate_count > 0) {
185 bs->byte_count += ret;
186 if (bs->byte_count > bs->renegotiate_count) {
188 bs->num_renegotiates++;
189 SSL_renegotiate(ssl);
193 if ((bs->renegotiate_timeout > 0) && (!r)) {
196 tm = (unsigned long)time(NULL);
197 if (tm > bs->last_time + bs->renegotiate_timeout) {
199 bs->num_renegotiates++;
200 SSL_renegotiate(ssl);
204 case SSL_ERROR_WANT_WRITE:
205 BIO_set_retry_write(b);
207 case SSL_ERROR_WANT_READ:
208 BIO_set_retry_read(b);
210 case SSL_ERROR_WANT_X509_LOOKUP:
211 BIO_set_retry_special(b);
212 retry_reason = BIO_RR_SSL_X509_LOOKUP;
214 case SSL_ERROR_WANT_CONNECT:
215 BIO_set_retry_special(b);
216 retry_reason = BIO_RR_CONNECT;
217 case SSL_ERROR_SYSCALL:
223 BIO_set_retry_reason(b, retry_reason);
227 static long ssl_ctrl(BIO *b, int cmd, long num, void *ptr)
235 bs = BIO_get_data(b);
238 if ((ssl == NULL) && (cmd != BIO_C_SET_SSL))
244 if (ssl->handshake_func == ssl->method->ssl_connect)
245 SSL_set_connect_state(ssl);
246 else if (ssl->handshake_func == ssl->method->ssl_accept)
247 SSL_set_accept_state(ssl);
249 if (!SSL_clear(ssl)) {
255 ret = BIO_ctrl(next, cmd, num, ptr);
256 else if (ssl->rbio != NULL)
257 ret = BIO_ctrl(ssl->rbio, cmd, num, ptr);
265 if (num) /* client mode */
266 SSL_set_connect_state(ssl);
268 SSL_set_accept_state(ssl);
270 case BIO_C_SET_SSL_RENEGOTIATE_TIMEOUT:
271 ret = bs->renegotiate_timeout;
274 bs->renegotiate_timeout = (unsigned long)num;
275 bs->last_time = (unsigned long)time(NULL);
277 case BIO_C_SET_SSL_RENEGOTIATE_BYTES:
278 ret = bs->renegotiate_count;
279 if ((long)num >= 512)
280 bs->renegotiate_count = (unsigned long)num;
282 case BIO_C_GET_SSL_NUM_RENEGOTIATES:
283 ret = bs->num_renegotiates;
291 BIO_set_shutdown(b, num);
294 bio = SSL_get_rbio(ssl);
298 BIO_set_next(b, bio);
310 case BIO_CTRL_GET_CLOSE:
311 ret = BIO_get_shutdown(b);
313 case BIO_CTRL_SET_CLOSE:
314 BIO_set_shutdown(b, (int)num);
316 case BIO_CTRL_WPENDING:
317 ret = BIO_ctrl(ssl->wbio, cmd, num, ptr);
319 case BIO_CTRL_PENDING:
320 ret = SSL_pending(ssl);
322 ret = BIO_pending(ssl->rbio);
325 BIO_clear_retry_flags(b);
326 ret = BIO_ctrl(ssl->wbio, cmd, num, ptr);
327 BIO_copy_next_retry(b);
330 if ((next != NULL) && (next != ssl->rbio)) {
332 * We are going to pass ownership of next to the SSL object...but
333 * we don't own a reference to pass yet - so up ref
336 SSL_set_bio(ssl, next, next);
340 /* Only detach if we are the BIO explicitly being popped */
342 /* This will clear the reference we obtained during push */
343 SSL_set_bio(ssl, NULL, NULL);
346 case BIO_C_DO_STATE_MACHINE:
347 BIO_clear_retry_flags(b);
349 BIO_set_retry_reason(b, 0);
350 ret = (int)SSL_do_handshake(ssl);
352 switch (SSL_get_error(ssl, (int)ret)) {
353 case SSL_ERROR_WANT_READ:
354 BIO_set_flags(b, BIO_FLAGS_READ | BIO_FLAGS_SHOULD_RETRY);
356 case SSL_ERROR_WANT_WRITE:
357 BIO_set_flags(b, BIO_FLAGS_WRITE | BIO_FLAGS_SHOULD_RETRY);
359 case SSL_ERROR_WANT_CONNECT:
360 BIO_set_flags(b, BIO_FLAGS_IO_SPECIAL | BIO_FLAGS_SHOULD_RETRY);
361 BIO_set_retry_reason(b, BIO_get_retry_reason(next));
363 case SSL_ERROR_WANT_X509_LOOKUP:
364 BIO_set_retry_special(b);
365 BIO_set_retry_reason(b, BIO_RR_SSL_X509_LOOKUP);
373 dbs = BIO_get_data(dbio);
375 dbs->ssl = SSL_dup(ssl);
376 dbs->num_renegotiates = bs->num_renegotiates;
377 dbs->renegotiate_count = bs->renegotiate_count;
378 dbs->byte_count = bs->byte_count;
379 dbs->renegotiate_timeout = bs->renegotiate_timeout;
380 dbs->last_time = bs->last_time;
381 ret = (dbs->ssl != NULL);
384 ret = BIO_ctrl(ssl->rbio, cmd, num, ptr);
386 case BIO_CTRL_SET_CALLBACK:
388 #if 0 /* FIXME: Should this be used? -- Richard
390 SSLerr(SSL_F_SSL_CTRL, ERR_R_SHOULD_NOT_HAVE_BEEN_CALLED);
398 ret = BIO_ctrl(ssl->rbio, cmd, num, ptr);
404 static long ssl_callback_ctrl(BIO *b, int cmd, BIO_info_cb *fp)
410 bs = BIO_get_data(b);
413 case BIO_CTRL_SET_CALLBACK:
414 ret = BIO_callback_ctrl(ssl->rbio, cmd, fp);
423 static int ssl_puts(BIO *bp, const char *str)
428 ret = BIO_write(bp, str, n);
432 BIO *BIO_new_buffer_ssl_connect(SSL_CTX *ctx)
434 #ifndef OPENSSL_NO_SOCK
435 BIO *ret = NULL, *buf = NULL, *ssl = NULL;
437 if ((buf = BIO_new(BIO_f_buffer())) == NULL)
439 if ((ssl = BIO_new_ssl_connect(ctx)) == NULL)
441 if ((ret = BIO_push(buf, ssl)) == NULL)
451 BIO *BIO_new_ssl_connect(SSL_CTX *ctx)
453 #ifndef OPENSSL_NO_SOCK
454 BIO *ret = NULL, *con = NULL, *ssl = NULL;
456 if ((con = BIO_new(BIO_s_connect())) == NULL)
458 if ((ssl = BIO_new_ssl(ctx, 1)) == NULL)
460 if ((ret = BIO_push(ssl, con)) == NULL)
469 BIO *BIO_new_ssl(SSL_CTX *ctx, int client)
474 if ((ret = BIO_new(BIO_f_ssl())) == NULL)
476 if ((ssl = SSL_new(ctx)) == NULL) {
481 SSL_set_connect_state(ssl);
483 SSL_set_accept_state(ssl);
485 BIO_set_ssl(ret, ssl, BIO_CLOSE);
489 int BIO_ssl_copy_session_id(BIO *t, BIO *f)
491 BIO_SSL *tdata, *fdata;
492 t = BIO_find_type(t, BIO_TYPE_SSL);
493 f = BIO_find_type(f, BIO_TYPE_SSL);
494 if ((t == NULL) || (f == NULL))
496 tdata = BIO_get_data(t);
497 fdata = BIO_get_data(f);
498 if ((tdata->ssl == NULL) || (fdata->ssl == NULL))
500 if (!SSL_copy_session_id(tdata->ssl, (fdata->ssl)))
505 void BIO_ssl_shutdown(BIO *b)
509 for (; b != NULL; b = BIO_next(b)) {
510 if (BIO_method_type(b) != BIO_TYPE_SSL)
512 bdata = BIO_get_data(b);
513 if (bdata != NULL && bdata->ssl != NULL)
514 SSL_shutdown(bdata->ssl);