1 /* ssl/record/record.h */
2 /* Copyright (C) 1995-1998 Eric Young (eay@cryptsoft.com)
5 * This package is an SSL implementation written
6 * by Eric Young (eay@cryptsoft.com).
7 * The implementation was written so as to conform with Netscapes SSL.
9 * This library is free for commercial and non-commercial use as long as
10 * the following conditions are aheared to. The following conditions
11 * apply to all code found in this distribution, be it the RC4, RSA,
12 * lhash, DES, etc., code; not just the SSL code. The SSL documentation
13 * included with this distribution is covered by the same copyright terms
14 * except that the holder is Tim Hudson (tjh@cryptsoft.com).
16 * Copyright remains Eric Young's, and as such any Copyright notices in
17 * the code are not to be removed.
18 * If this package is used in a product, Eric Young should be given attribution
19 * as the author of the parts of the library used.
20 * This can be in the form of a textual message at program startup or
21 * in documentation (online or textual) provided with the package.
23 * Redistribution and use in source and binary forms, with or without
24 * modification, are permitted provided that the following conditions
26 * 1. Redistributions of source code must retain the copyright
27 * notice, this list of conditions and the following disclaimer.
28 * 2. Redistributions in binary form must reproduce the above copyright
29 * notice, this list of conditions and the following disclaimer in the
30 * documentation and/or other materials provided with the distribution.
31 * 3. All advertising materials mentioning features or use of this software
32 * must display the following acknowledgement:
33 * "This product includes cryptographic software written by
34 * Eric Young (eay@cryptsoft.com)"
35 * The word 'cryptographic' can be left out if the rouines from the library
36 * being used are not cryptographic related :-).
37 * 4. If you include any Windows specific code (or a derivative thereof) from
38 * the apps directory (application code) you must include an acknowledgement:
39 * "This product includes software written by Tim Hudson (tjh@cryptsoft.com)"
41 * THIS SOFTWARE IS PROVIDED BY ERIC YOUNG ``AS IS'' AND
42 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
43 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
44 * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
45 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
46 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
47 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
48 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
49 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
50 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
53 * The licence and distribution terms for any publically available version or
54 * derivative of this code cannot be changed. i.e. this code cannot simply be
55 * copied and put under another distribution licence
56 * [including the GNU Public Licence.]
58 /* ====================================================================
59 * Copyright (c) 1998-2015 The OpenSSL Project. All rights reserved.
61 * Redistribution and use in source and binary forms, with or without
62 * modification, are permitted provided that the following conditions
65 * 1. Redistributions of source code must retain the above copyright
66 * notice, this list of conditions and the following disclaimer.
68 * 2. Redistributions in binary form must reproduce the above copyright
69 * notice, this list of conditions and the following disclaimer in
70 * the documentation and/or other materials provided with the
73 * 3. All advertising materials mentioning features or use of this
74 * software must display the following acknowledgment:
75 * "This product includes software developed by the OpenSSL Project
76 * for use in the OpenSSL Toolkit. (http://www.openssl.org/)"
78 * 4. The names "OpenSSL Toolkit" and "OpenSSL Project" must not be used to
79 * endorse or promote products derived from this software without
80 * prior written permission. For written permission, please contact
81 * openssl-core@openssl.org.
83 * 5. Products derived from this software may not be called "OpenSSL"
84 * nor may "OpenSSL" appear in their names without prior written
85 * permission of the OpenSSL Project.
87 * 6. Redistributions of any form whatsoever must retain the following
89 * "This product includes software developed by the OpenSSL Project
90 * for use in the OpenSSL Toolkit (http://www.openssl.org/)"
92 * THIS SOFTWARE IS PROVIDED BY THE OpenSSL PROJECT ``AS IS'' AND ANY
93 * EXPRESSED OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
94 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
95 * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE OpenSSL PROJECT OR
96 * ITS CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
97 * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
98 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
99 * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
100 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
101 * STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
102 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED
103 * OF THE POSSIBILITY OF SUCH DAMAGE.
104 * ====================================================================
106 * This product includes cryptographic software written by Eric Young
107 * (eay@cryptsoft.com). This product includes software written by Tim
108 * Hudson (tjh@cryptsoft.com).
112 /*****************************************************************************
114 * These structures should be considered PRIVATE to the record layer. No *
115 * non-record layer code should be using these structures in any way. *
117 *****************************************************************************/
119 typedef struct ssl3_buffer_st {
120 /* at least SSL3_RT_MAX_PACKET_SIZE bytes, see ssl3_setup_buffers() */
124 /* where to 'copy from' */
126 /* how many bytes left */
130 typedef struct ssl3_record_st {
135 /* How many bytes available */
138 */ unsigned int length;
140 * How many bytes were available before padding was removed? This is used
141 * to implement the MAC check in constant time for CBC records.
145 */ unsigned int orig_len;
146 /* read/write offset into 'buf' */
150 /* pointer to the record data */
153 */ unsigned char *data;
154 /* where the decode bytes are */
157 */ unsigned char *input;
158 /* only used with decompression - malloc()ed */
161 */ unsigned char *comp;
162 /* epoch number, needed by DTLS1 */
165 */ unsigned long epoch;
166 /* sequence number, needed by DTLS1 */
169 */ unsigned char seq_num[8];
172 typedef struct dtls1_bitmap_st {
173 unsigned long map; /* track 32 packets on 32-bit systems and 64
174 * - on 64-bit systems */
176 unsigned char max_seq_num[8]; /* max record number seen so far, 64-bit
177 * value in big-endian encoding */
180 typedef struct record_pqueue_st {
181 unsigned short epoch;
185 typedef struct dtls1_record_data_st {
186 unsigned char *packet;
187 unsigned int packet_length;
190 # ifndef OPENSSL_NO_SCTP
191 struct bio_dgram_sctp_rcvinfo recordinfo;
196 typedef struct dtls_record_layer_st {
198 * The current data and handshake epoch. This is initially
199 * undefined, and starts at zero once the initial handshake is
202 unsigned short r_epoch;
203 unsigned short w_epoch;
205 /* records being received in the current epoch */
207 /* renegotiation starts a new set of sequence numbers */
208 DTLS1_BITMAP next_bitmap;
210 /* Received handshake records (processed and unprocessed) */
211 record_pqueue unprocessed_rcds;
212 record_pqueue processed_rcds;
214 * Buffered application records. Only for records between CCS and
215 * Finished to prevent either protocol violation or unnecessary message
218 record_pqueue buffered_app_data;
220 * storage for Alert/Handshake protocol data received but not yet
221 * processed by ssl3_read_bytes:
223 unsigned char alert_fragment[DTLS1_AL_HEADER_LENGTH];
224 unsigned int alert_fragment_len;
225 unsigned char handshake_fragment[DTLS1_HM_HEADER_LENGTH];
226 unsigned int handshake_fragment_len;
228 /* save last and current sequence numbers for retransmissions */
229 unsigned char last_write_sequence[8];
230 unsigned char curr_write_sequence[8];
233 /*****************************************************************************
235 * This structure should be considered "opaque" to anything outside of the *
236 * record layer. No non-record layer code should be accessing the members of *
239 *****************************************************************************/
241 typedef struct record_layer_st {
242 /* The parent SSL structure */
245 * Read as many input bytes as possible (for
246 * non-blocking reads)
249 /* where we are when reading */
251 /* read IO goes into here */
253 /* write IO goes into here */
255 /* each decoded record goes in here */
257 /* goes out from here */
260 /* used internally to point at a raw packet */
261 unsigned char *packet;
262 unsigned int packet_length;
264 /* number of bytes sent so far */
268 * storage for Alert/Handshake protocol data received but not yet
269 * processed by ssl3_read_bytes:
271 unsigned char alert_fragment[2];
272 unsigned int alert_fragment_len;
273 unsigned char handshake_fragment[4];
274 unsigned int handshake_fragment_len;
276 /* partial write - check the numbers match */
277 /* number bytes written */
280 /* number of bytes submitted */
282 const unsigned char *wpend_buf;
284 unsigned char read_sequence[8];
285 unsigned char write_sequence[8];
287 DTLS_RECORD_LAYER *d;
291 /*****************************************************************************
293 * The following macros/functions represent the libssl internal API to the *
294 * record layer. Any libssl code may call these functions/macros *
296 *****************************************************************************/
298 #define RECORD_LAYER_set_read_ahead(rl, ra) ((rl)->read_ahead = (ra))
299 #define RECORD_LAYER_get_read_ahead(rl) ((rl)->read_ahead)
300 #define RECORD_LAYER_get_packet(rl) ((rl)->packet)
301 #define RECORD_LAYER_get_packet_length(rl) ((rl)->packet_length)
302 #define RECORD_LAYER_add_packet_length(rl, inc) ((rl)->packet_length += (inc))
303 #define DTLS_RECORD_LAYER_get_w_epoch(rl) ((rl)->d->w_epoch)
304 #define DTLS_RECORD_LAYER_get_processed_rcds(rl) \
305 ((rl)->d->processed_rcds)
306 #define DTLS_RECORD_LAYER_get_unprocessed_rcds(rl) \
307 ((rl)->d->unprocessed_rcds)
309 void RECORD_LAYER_init(RECORD_LAYER *rl, SSL *s);
310 void RECORD_LAYER_clear(RECORD_LAYER *rl);
311 void RECORD_LAYER_release(RECORD_LAYER *rl);
312 int RECORD_LAYER_read_pending(RECORD_LAYER *rl);
313 int RECORD_LAYER_write_pending(RECORD_LAYER *rl);
314 int RECORD_LAYER_set_data(RECORD_LAYER *rl, const unsigned char *buf, int len);
315 void RECORD_LAYER_dup(RECORD_LAYER *dst, RECORD_LAYER *src);
316 void RECORD_LAYER_reset_read_sequence(RECORD_LAYER *rl);
317 void RECORD_LAYER_reset_write_sequence(RECORD_LAYER *rl);
318 int RECORD_LAYER_setup_comp_buffer(RECORD_LAYER *rl);
319 __owur int ssl3_pending(const SSL *s);
320 __owur int ssl23_read_bytes(SSL *s, int n);
321 __owur int ssl23_write_bytes(SSL *s);
322 __owur int ssl3_write_bytes(SSL *s, int type, const void *buf, int len);
323 __owur int do_ssl3_write(SSL *s, int type, const unsigned char *buf,
324 unsigned int len, int create_empty_fragment);
325 __owur int ssl3_read_bytes(SSL *s, int type, unsigned char *buf, int len, int peek);
326 __owur int ssl3_setup_buffers(SSL *s);
327 __owur int ssl3_enc(SSL *s, int send_data);
328 __owur int n_ssl3_mac(SSL *ssl, unsigned char *md, int send_data);
329 __owur int ssl3_write_pending(SSL *s, int type, const unsigned char *buf,
331 __owur int tls1_enc(SSL *s, int snd);
332 __owur int tls1_mac(SSL *ssl, unsigned char *md, int snd);
333 int DTLS_RECORD_LAYER_new(RECORD_LAYER *rl);
334 void DTLS_RECORD_LAYER_free(RECORD_LAYER *rl);
335 void DTLS_RECORD_LAYER_clear(RECORD_LAYER *rl);
336 void DTLS_RECORD_LAYER_set_saved_w_epoch(RECORD_LAYER *rl, unsigned short e);
337 void DTLS_RECORD_LAYER_clear(RECORD_LAYER *rl);
338 void DTLS_RECORD_LAYER_resync_write(RECORD_LAYER *rl);
339 __owur int dtls1_read_bytes(SSL *s, int type, unsigned char *buf, int len, int peek);
340 __owur int dtls1_write_bytes(SSL *s, int type, const void *buf, int len);
341 __owur int do_dtls1_write(SSL *s, int type, const unsigned char *buf,
342 unsigned int len, int create_empty_fragement);
343 void dtls1_reset_seq_numbers(SSL *s, int rw);