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, int num);
20 static int ssl_read(BIO *b, char *out, size_t outl, size_t *read);
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, size_t outl, size_t *read)
100 sb = BIO_get_data(b);
103 BIO_clear_retry_flags(b);
108 ret = SSL_read(ssl, out, outl);
110 switch (SSL_get_error(ssl, ret)) {
114 if (sb->renegotiate_count > 0) {
115 sb->byte_count += ret;
116 if (sb->byte_count > sb->renegotiate_count) {
118 sb->num_renegotiates++;
119 SSL_renegotiate(ssl);
123 if ((sb->renegotiate_timeout > 0) && (!r)) {
126 tm = (unsigned long)time(NULL);
127 if (tm > sb->last_time + sb->renegotiate_timeout) {
129 sb->num_renegotiates++;
130 SSL_renegotiate(ssl);
135 case SSL_ERROR_WANT_READ:
136 BIO_set_retry_read(b);
138 case SSL_ERROR_WANT_WRITE:
139 BIO_set_retry_write(b);
141 case SSL_ERROR_WANT_X509_LOOKUP:
142 BIO_set_retry_special(b);
143 retry_reason = BIO_RR_SSL_X509_LOOKUP;
145 case SSL_ERROR_WANT_ACCEPT:
146 BIO_set_retry_special(b);
147 retry_reason = BIO_RR_ACCEPT;
149 case SSL_ERROR_WANT_CONNECT:
150 BIO_set_retry_special(b);
151 retry_reason = BIO_RR_CONNECT;
153 case SSL_ERROR_SYSCALL:
155 case SSL_ERROR_ZERO_RETURN:
160 BIO_set_retry_reason(b, retry_reason);
170 static int ssl_write(BIO *b, const char *out, int outl)
173 int retry_reason = 0;
179 bs = BIO_get_data(b);
182 BIO_clear_retry_flags(b);
185 * ret=SSL_do_handshake(ssl); if (ret > 0)
187 ret = SSL_write(ssl, out, outl);
189 switch (SSL_get_error(ssl, ret)) {
193 if (bs->renegotiate_count > 0) {
194 bs->byte_count += ret;
195 if (bs->byte_count > bs->renegotiate_count) {
197 bs->num_renegotiates++;
198 SSL_renegotiate(ssl);
202 if ((bs->renegotiate_timeout > 0) && (!r)) {
205 tm = (unsigned long)time(NULL);
206 if (tm > bs->last_time + bs->renegotiate_timeout) {
208 bs->num_renegotiates++;
209 SSL_renegotiate(ssl);
213 case SSL_ERROR_WANT_WRITE:
214 BIO_set_retry_write(b);
216 case SSL_ERROR_WANT_READ:
217 BIO_set_retry_read(b);
219 case SSL_ERROR_WANT_X509_LOOKUP:
220 BIO_set_retry_special(b);
221 retry_reason = BIO_RR_SSL_X509_LOOKUP;
223 case SSL_ERROR_WANT_CONNECT:
224 BIO_set_retry_special(b);
225 retry_reason = BIO_RR_CONNECT;
226 case SSL_ERROR_SYSCALL:
232 BIO_set_retry_reason(b, retry_reason);
236 static long ssl_ctrl(BIO *b, int cmd, long num, void *ptr)
244 bs = BIO_get_data(b);
247 if ((ssl == NULL) && (cmd != BIO_C_SET_SSL))
253 if (ssl->handshake_func == ssl->method->ssl_connect)
254 SSL_set_connect_state(ssl);
255 else if (ssl->handshake_func == ssl->method->ssl_accept)
256 SSL_set_accept_state(ssl);
258 if (!SSL_clear(ssl)) {
264 ret = BIO_ctrl(next, cmd, num, ptr);
265 else if (ssl->rbio != NULL)
266 ret = BIO_ctrl(ssl->rbio, cmd, num, ptr);
274 if (num) /* client mode */
275 SSL_set_connect_state(ssl);
277 SSL_set_accept_state(ssl);
279 case BIO_C_SET_SSL_RENEGOTIATE_TIMEOUT:
280 ret = bs->renegotiate_timeout;
283 bs->renegotiate_timeout = (unsigned long)num;
284 bs->last_time = (unsigned long)time(NULL);
286 case BIO_C_SET_SSL_RENEGOTIATE_BYTES:
287 ret = bs->renegotiate_count;
288 if ((long)num >= 512)
289 bs->renegotiate_count = (unsigned long)num;
291 case BIO_C_GET_SSL_NUM_RENEGOTIATES:
292 ret = bs->num_renegotiates;
300 BIO_set_shutdown(b, num);
303 bio = SSL_get_rbio(ssl);
307 BIO_set_next(b, bio);
319 case BIO_CTRL_GET_CLOSE:
320 ret = BIO_get_shutdown(b);
322 case BIO_CTRL_SET_CLOSE:
323 BIO_set_shutdown(b, (int)num);
325 case BIO_CTRL_WPENDING:
326 ret = BIO_ctrl(ssl->wbio, cmd, num, ptr);
328 case BIO_CTRL_PENDING:
329 ret = SSL_pending(ssl);
331 ret = BIO_pending(ssl->rbio);
334 BIO_clear_retry_flags(b);
335 ret = BIO_ctrl(ssl->wbio, cmd, num, ptr);
336 BIO_copy_next_retry(b);
339 if ((next != NULL) && (next != ssl->rbio)) {
341 * We are going to pass ownership of next to the SSL object...but
342 * we don't own a reference to pass yet - so up ref
345 SSL_set_bio(ssl, next, next);
349 /* Only detach if we are the BIO explicitly being popped */
351 /* This will clear the reference we obtained during push */
352 SSL_set_bio(ssl, NULL, NULL);
355 case BIO_C_DO_STATE_MACHINE:
356 BIO_clear_retry_flags(b);
358 BIO_set_retry_reason(b, 0);
359 ret = (int)SSL_do_handshake(ssl);
361 switch (SSL_get_error(ssl, (int)ret)) {
362 case SSL_ERROR_WANT_READ:
363 BIO_set_flags(b, BIO_FLAGS_READ | BIO_FLAGS_SHOULD_RETRY);
365 case SSL_ERROR_WANT_WRITE:
366 BIO_set_flags(b, BIO_FLAGS_WRITE | BIO_FLAGS_SHOULD_RETRY);
368 case SSL_ERROR_WANT_CONNECT:
369 BIO_set_flags(b, BIO_FLAGS_IO_SPECIAL | BIO_FLAGS_SHOULD_RETRY);
370 BIO_set_retry_reason(b, BIO_get_retry_reason(next));
372 case SSL_ERROR_WANT_X509_LOOKUP:
373 BIO_set_retry_special(b);
374 BIO_set_retry_reason(b, BIO_RR_SSL_X509_LOOKUP);
382 dbs = BIO_get_data(dbio);
384 dbs->ssl = SSL_dup(ssl);
385 dbs->num_renegotiates = bs->num_renegotiates;
386 dbs->renegotiate_count = bs->renegotiate_count;
387 dbs->byte_count = bs->byte_count;
388 dbs->renegotiate_timeout = bs->renegotiate_timeout;
389 dbs->last_time = bs->last_time;
390 ret = (dbs->ssl != NULL);
393 ret = BIO_ctrl(ssl->rbio, cmd, num, ptr);
395 case BIO_CTRL_SET_CALLBACK:
397 #if 0 /* FIXME: Should this be used? -- Richard
399 SSLerr(SSL_F_SSL_CTRL, ERR_R_SHOULD_NOT_HAVE_BEEN_CALLED);
406 case BIO_CTRL_GET_CALLBACK:
408 void (**fptr) (const SSL *xssl, int type, int val);
410 fptr = (void (**)(const SSL *xssl, int type, int val))ptr;
411 *fptr = SSL_get_info_callback(ssl);
415 ret = BIO_ctrl(ssl->rbio, cmd, num, ptr);
421 static long ssl_callback_ctrl(BIO *b, int cmd, bio_info_cb *fp)
427 bs = BIO_get_data(b);
430 case BIO_CTRL_SET_CALLBACK:
433 * FIXME: setting this via a completely different prototype seems
436 SSL_set_info_callback(ssl, (void (*)(const SSL *, int, int))fp);
440 ret = BIO_callback_ctrl(ssl->rbio, cmd, fp);
446 static int ssl_puts(BIO *bp, const char *str)
451 ret = BIO_write(bp, str, n);
455 BIO *BIO_new_buffer_ssl_connect(SSL_CTX *ctx)
457 #ifndef OPENSSL_NO_SOCK
458 BIO *ret = NULL, *buf = NULL, *ssl = NULL;
460 if ((buf = BIO_new(BIO_f_buffer())) == NULL)
462 if ((ssl = BIO_new_ssl_connect(ctx)) == NULL)
464 if ((ret = BIO_push(buf, ssl)) == NULL)
474 BIO *BIO_new_ssl_connect(SSL_CTX *ctx)
476 #ifndef OPENSSL_NO_SOCK
477 BIO *ret = NULL, *con = NULL, *ssl = NULL;
479 if ((con = BIO_new(BIO_s_connect())) == NULL)
481 if ((ssl = BIO_new_ssl(ctx, 1)) == NULL)
483 if ((ret = BIO_push(ssl, con)) == NULL)
492 BIO *BIO_new_ssl(SSL_CTX *ctx, int client)
497 if ((ret = BIO_new(BIO_f_ssl())) == NULL)
499 if ((ssl = SSL_new(ctx)) == NULL) {
504 SSL_set_connect_state(ssl);
506 SSL_set_accept_state(ssl);
508 BIO_set_ssl(ret, ssl, BIO_CLOSE);
512 int BIO_ssl_copy_session_id(BIO *t, BIO *f)
514 BIO_SSL *tdata, *fdata;
515 t = BIO_find_type(t, BIO_TYPE_SSL);
516 f = BIO_find_type(f, BIO_TYPE_SSL);
517 if ((t == NULL) || (f == NULL))
519 tdata = BIO_get_data(t);
520 fdata = BIO_get_data(f);
521 if ((tdata->ssl == NULL) || (fdata->ssl == NULL))
523 if (!SSL_copy_session_id(tdata->ssl, (fdata->ssl)))
528 void BIO_ssl_shutdown(BIO *b)
532 b = BIO_find_type(b, BIO_TYPE_SSL);