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);
109 ret = SSL_read(ssl, buf, size);
113 switch (SSL_get_error(ssl, ret)) {
117 if (sb->renegotiate_count > 0) {
118 sb->byte_count += *readbytes;
119 if (sb->byte_count > sb->renegotiate_count) {
121 sb->num_renegotiates++;
122 SSL_renegotiate(ssl);
126 if ((sb->renegotiate_timeout > 0) && (!r)) {
129 tm = (unsigned long)time(NULL);
130 if (tm > sb->last_time + sb->renegotiate_timeout) {
132 sb->num_renegotiates++;
133 SSL_renegotiate(ssl);
138 case SSL_ERROR_WANT_READ:
139 BIO_set_retry_read(b);
141 case SSL_ERROR_WANT_WRITE:
142 BIO_set_retry_write(b);
144 case SSL_ERROR_WANT_X509_LOOKUP:
145 BIO_set_retry_special(b);
146 retry_reason = BIO_RR_SSL_X509_LOOKUP;
148 case SSL_ERROR_WANT_ACCEPT:
149 BIO_set_retry_special(b);
150 retry_reason = BIO_RR_ACCEPT;
152 case SSL_ERROR_WANT_CONNECT:
153 BIO_set_retry_special(b);
154 retry_reason = BIO_RR_CONNECT;
156 case SSL_ERROR_SYSCALL:
158 case SSL_ERROR_ZERO_RETURN:
163 BIO_set_retry_reason(b, retry_reason);
168 static int ssl_write(BIO *b, const char *buf, size_t size, size_t *written)
171 int retry_reason = 0;
177 bs = BIO_get_data(b);
180 BIO_clear_retry_flags(b);
182 ret = SSL_write_ex(ssl, buf, size, written);
184 switch (SSL_get_error(ssl, ret)) {
188 if (bs->renegotiate_count > 0) {
189 bs->byte_count += *written;
190 if (bs->byte_count > bs->renegotiate_count) {
192 bs->num_renegotiates++;
193 SSL_renegotiate(ssl);
197 if ((bs->renegotiate_timeout > 0) && (!r)) {
200 tm = (unsigned long)time(NULL);
201 if (tm > bs->last_time + bs->renegotiate_timeout) {
203 bs->num_renegotiates++;
204 SSL_renegotiate(ssl);
208 case SSL_ERROR_WANT_WRITE:
209 BIO_set_retry_write(b);
211 case SSL_ERROR_WANT_READ:
212 BIO_set_retry_read(b);
214 case SSL_ERROR_WANT_X509_LOOKUP:
215 BIO_set_retry_special(b);
216 retry_reason = BIO_RR_SSL_X509_LOOKUP;
218 case SSL_ERROR_WANT_CONNECT:
219 BIO_set_retry_special(b);
220 retry_reason = BIO_RR_CONNECT;
221 case SSL_ERROR_SYSCALL:
227 BIO_set_retry_reason(b, retry_reason);
232 static long ssl_ctrl(BIO *b, int cmd, long num, void *ptr)
240 bs = BIO_get_data(b);
243 if ((ssl == NULL) && (cmd != BIO_C_SET_SSL))
249 if (ssl->handshake_func == ssl->method->ssl_connect)
250 SSL_set_connect_state(ssl);
251 else if (ssl->handshake_func == ssl->method->ssl_accept)
252 SSL_set_accept_state(ssl);
254 if (!SSL_clear(ssl)) {
260 ret = BIO_ctrl(next, cmd, num, ptr);
261 else if (ssl->rbio != NULL)
262 ret = BIO_ctrl(ssl->rbio, cmd, num, ptr);
270 if (num) /* client mode */
271 SSL_set_connect_state(ssl);
273 SSL_set_accept_state(ssl);
275 case BIO_C_SET_SSL_RENEGOTIATE_TIMEOUT:
276 ret = bs->renegotiate_timeout;
279 bs->renegotiate_timeout = (unsigned long)num;
280 bs->last_time = (unsigned long)time(NULL);
282 case BIO_C_SET_SSL_RENEGOTIATE_BYTES:
283 ret = bs->renegotiate_count;
284 if ((long)num >= 512)
285 bs->renegotiate_count = (unsigned long)num;
287 case BIO_C_GET_SSL_NUM_RENEGOTIATES:
288 ret = bs->num_renegotiates;
296 BIO_set_shutdown(b, num);
299 bio = SSL_get_rbio(ssl);
303 BIO_set_next(b, bio);
315 case BIO_CTRL_GET_CLOSE:
316 ret = BIO_get_shutdown(b);
318 case BIO_CTRL_SET_CLOSE:
319 BIO_set_shutdown(b, (int)num);
321 case BIO_CTRL_WPENDING:
322 ret = BIO_ctrl(ssl->wbio, cmd, num, ptr);
324 case BIO_CTRL_PENDING:
325 ret = SSL_pending(ssl);
327 ret = BIO_pending(ssl->rbio);
330 BIO_clear_retry_flags(b);
331 ret = BIO_ctrl(ssl->wbio, cmd, num, ptr);
332 BIO_copy_next_retry(b);
335 if ((next != NULL) && (next != ssl->rbio)) {
337 * We are going to pass ownership of next to the SSL object...but
338 * we don't own a reference to pass yet - so up ref
341 SSL_set_bio(ssl, next, next);
345 /* Only detach if we are the BIO explicitly being popped */
347 /* This will clear the reference we obtained during push */
348 SSL_set_bio(ssl, NULL, NULL);
351 case BIO_C_DO_STATE_MACHINE:
352 BIO_clear_retry_flags(b);
354 BIO_set_retry_reason(b, 0);
355 ret = (int)SSL_do_handshake(ssl);
357 switch (SSL_get_error(ssl, (int)ret)) {
358 case SSL_ERROR_WANT_READ:
359 BIO_set_flags(b, BIO_FLAGS_READ | BIO_FLAGS_SHOULD_RETRY);
361 case SSL_ERROR_WANT_WRITE:
362 BIO_set_flags(b, BIO_FLAGS_WRITE | BIO_FLAGS_SHOULD_RETRY);
364 case SSL_ERROR_WANT_CONNECT:
365 BIO_set_flags(b, BIO_FLAGS_IO_SPECIAL | BIO_FLAGS_SHOULD_RETRY);
366 BIO_set_retry_reason(b, BIO_get_retry_reason(next));
368 case SSL_ERROR_WANT_X509_LOOKUP:
369 BIO_set_retry_special(b);
370 BIO_set_retry_reason(b, BIO_RR_SSL_X509_LOOKUP);
378 dbs = BIO_get_data(dbio);
380 dbs->ssl = SSL_dup(ssl);
381 dbs->num_renegotiates = bs->num_renegotiates;
382 dbs->renegotiate_count = bs->renegotiate_count;
383 dbs->byte_count = bs->byte_count;
384 dbs->renegotiate_timeout = bs->renegotiate_timeout;
385 dbs->last_time = bs->last_time;
386 ret = (dbs->ssl != NULL);
389 ret = BIO_ctrl(ssl->rbio, cmd, num, ptr);
391 case BIO_CTRL_SET_CALLBACK:
393 #if 0 /* FIXME: Should this be used? -- Richard
395 SSLerr(SSL_F_SSL_CTRL, ERR_R_SHOULD_NOT_HAVE_BEEN_CALLED);
402 case BIO_CTRL_GET_CALLBACK:
404 void (**fptr) (const SSL *xssl, int type, int val);
406 fptr = (void (**)(const SSL *xssl, int type, int val))ptr;
407 *fptr = SSL_get_info_callback(ssl);
411 ret = BIO_ctrl(ssl->rbio, cmd, num, ptr);
417 static long ssl_callback_ctrl(BIO *b, int cmd, bio_info_cb *fp)
423 bs = BIO_get_data(b);
426 case BIO_CTRL_SET_CALLBACK:
429 * FIXME: setting this via a completely different prototype seems
432 SSL_set_info_callback(ssl, (void (*)(const SSL *, int, int))fp);
436 ret = BIO_callback_ctrl(ssl->rbio, cmd, fp);
442 static int ssl_puts(BIO *bp, const char *str)
447 ret = BIO_write(bp, str, n);
451 BIO *BIO_new_buffer_ssl_connect(SSL_CTX *ctx)
453 #ifndef OPENSSL_NO_SOCK
454 BIO *ret = NULL, *buf = NULL, *ssl = NULL;
456 if ((buf = BIO_new(BIO_f_buffer())) == NULL)
458 if ((ssl = BIO_new_ssl_connect(ctx)) == NULL)
460 if ((ret = BIO_push(buf, ssl)) == NULL)
470 BIO *BIO_new_ssl_connect(SSL_CTX *ctx)
472 #ifndef OPENSSL_NO_SOCK
473 BIO *ret = NULL, *con = NULL, *ssl = NULL;
475 if ((con = BIO_new(BIO_s_connect())) == NULL)
477 if ((ssl = BIO_new_ssl(ctx, 1)) == NULL)
479 if ((ret = BIO_push(ssl, con)) == NULL)
488 BIO *BIO_new_ssl(SSL_CTX *ctx, int client)
493 if ((ret = BIO_new(BIO_f_ssl())) == NULL)
495 if ((ssl = SSL_new(ctx)) == NULL) {
500 SSL_set_connect_state(ssl);
502 SSL_set_accept_state(ssl);
504 BIO_set_ssl(ret, ssl, BIO_CLOSE);
508 int BIO_ssl_copy_session_id(BIO *t, BIO *f)
510 BIO_SSL *tdata, *fdata;
511 t = BIO_find_type(t, BIO_TYPE_SSL);
512 f = BIO_find_type(f, BIO_TYPE_SSL);
513 if ((t == NULL) || (f == NULL))
515 tdata = BIO_get_data(t);
516 fdata = BIO_get_data(f);
517 if ((tdata->ssl == NULL) || (fdata->ssl == NULL))
519 if (!SSL_copy_session_id(tdata->ssl, (fdata->ssl)))
524 void BIO_ssl_shutdown(BIO *b)
528 b = BIO_find_type(b, BIO_TYPE_SSL);