205 lines
10 KiB
C
205 lines
10 KiB
C
/* ssl/record/rec_layer.h */
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/* Copyright (C) 1995-1998 Eric Young (eay@cryptsoft.com)
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* All rights reserved.
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*
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* This package is an SSL implementation written
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* by Eric Young (eay@cryptsoft.com).
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* The implementation was written so as to conform with Netscapes SSL.
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*
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* This library is free for commercial and non-commercial use as long as
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* the following conditions are aheared to. The following conditions
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* apply to all code found in this distribution, be it the RC4, RSA,
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* lhash, DES, etc., code; not just the SSL code. The SSL documentation
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* included with this distribution is covered by the same copyright terms
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* except that the holder is Tim Hudson (tjh@cryptsoft.com).
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*
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* Copyright remains Eric Young's, and as such any Copyright notices in
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* the code are not to be removed.
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* If this package is used in a product, Eric Young should be given attribution
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* as the author of the parts of the library used.
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* This can be in the form of a textual message at program startup or
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* in documentation (online or textual) provided with the package.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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* 3. All advertising materials mentioning features or use of this software
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* must display the following acknowledgement:
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* "This product includes cryptographic software written by
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* Eric Young (eay@cryptsoft.com)"
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* The word 'cryptographic' can be left out if the rouines from the library
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* being used are not cryptographic related :-).
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* 4. If you include any Windows specific code (or a derivative thereof) from
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* the apps directory (application code) you must include an acknowledgement:
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* "This product includes software written by Tim Hudson (tjh@cryptsoft.com)"
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*
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* THIS SOFTWARE IS PROVIDED BY ERIC YOUNG ``AS IS'' AND
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* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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* ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
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* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
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* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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* SUCH DAMAGE.
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*
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* The licence and distribution terms for any publically available version or
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* derivative of this code cannot be changed. i.e. this code cannot simply be
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* copied and put under another distribution licence
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* [including the GNU Public Licence.]
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*/
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/* ====================================================================
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* Copyright (c) 1998-2002 The OpenSSL Project. All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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*
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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*
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in
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* the documentation and/or other materials provided with the
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* distribution.
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*
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* 3. All advertising materials mentioning features or use of this
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* software must display the following acknowledgment:
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* "This product includes software developed by the OpenSSL Project
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* for use in the OpenSSL Toolkit. (http://www.openssl.org/)"
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*
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* 4. The names "OpenSSL Toolkit" and "OpenSSL Project" must not be used to
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* endorse or promote products derived from this software without
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* prior written permission. For written permission, please contact
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* openssl-core@openssl.org.
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*
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* 5. Products derived from this software may not be called "OpenSSL"
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* nor may "OpenSSL" appear in their names without prior written
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* permission of the OpenSSL Project.
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*
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* 6. Redistributions of any form whatsoever must retain the following
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* acknowledgment:
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* "This product includes software developed by the OpenSSL Project
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* for use in the OpenSSL Toolkit (http://www.openssl.org/)"
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*
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* THIS SOFTWARE IS PROVIDED BY THE OpenSSL PROJECT ``AS IS'' AND ANY
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* EXPRESSED OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
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* PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE OpenSSL PROJECT OR
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* ITS CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
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* SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
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* NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
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* LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
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* STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
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* ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED
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* OF THE POSSIBILITY OF SUCH DAMAGE.
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* ====================================================================
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*
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* This product includes cryptographic software written by Eric Young
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* (eay@cryptsoft.com). This product includes software written by Tim
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* Hudson (tjh@cryptsoft.com).
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*
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*/
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#include "../ssl_locl.h"
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/*****************************************************************************
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* *
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* These structures should be considered "opaque" to anything outside of the *
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* record layer. No non-record layer code should be accessing the members of *
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* these structures. *
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* *
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*****************************************************************************/
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typedef struct dtls1_bitmap_st {
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unsigned long map; /* track 32 packets on 32-bit systems and 64
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* - on 64-bit systems */
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unsigned char max_seq_num[8]; /* max record number seen so far, 64-bit
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* value in big-endian encoding */
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} DTLS1_BITMAP;
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typedef struct record_pqueue_st {
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unsigned short epoch;
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pqueue q;
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} record_pqueue;
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typedef struct record_layer_st {
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/* The parent SSL structure */
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SSL *s;
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/*
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* Read as many input bytes as possible (for
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* non-blocking reads)
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*/
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int read_ahead;
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/* read IO goes into here */
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SSL3_BUFFER rbuf;
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/* write IO goes into here */
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SSL3_BUFFER wbuf;
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/* each decoded record goes in here */
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SSL3_RECORD rrec;
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/* goes out from here */
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SSL3_RECORD wrec;
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} RECORD_LAYER;
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/*****************************************************************************
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* *
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* The following macros/functions represent the libssl internal API to the *
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* record layer. *
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* *
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*****************************************************************************/
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#define RECORD_LAYER_set_ssl(rl, s) ((rl)->s = (s))
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#define RECORD_LAYER_set_read_ahead(rl, ra) ((rl)->read_ahead = (ra))
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#define RECORD_LAYER_get_read_ahead(rl) ((rl)->read_ahead)
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#define RECORD_LAYER_get_rbuf(rl) (&(rl)->rbuf)
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#define RECORD_LAYER_get_wbuf(rl) (&(rl)->wbuf)
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#define RECORD_LAYER_get_rrec(rl) (&(rl)->rrec)
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#define RECORD_LAYER_get_wrec(rl) (&(rl)->wrec)
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void RECORD_LAYER_clear(RECORD_LAYER *rl);
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void RECORD_LAYER_release(RECORD_LAYER *rl);
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int RECORD_LAYER_read_pending(RECORD_LAYER *rl);
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int RECORD_LAYER_write_pending(RECORD_LAYER *rl);
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int RECORD_LAYER_set_data(RECORD_LAYER *rl, const unsigned char *buf, int len);
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__owur int ssl23_read_bytes(SSL *s, int n);
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__owur int ssl23_write_bytes(SSL *s);
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__owur int ssl3_write_bytes(SSL *s, int type, const void *buf, int len);
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__owur int do_ssl3_write(SSL *s, int type, const unsigned char *buf,
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unsigned int len, int create_empty_fragment);
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__owur int ssl3_read_bytes(SSL *s, int type, unsigned char *buf, int len, int peek);
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__owur int dtls1_read_bytes(SSL *s, int type, unsigned char *buf, int len, int peek);
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int dtls1_write_bytes(SSL *s, int type, const void *buf, int len);
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__owur int do_dtls1_write(SSL *s, int type, const unsigned char *buf,
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unsigned int len, int create_empty_fragement);
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void dtls1_reset_seq_numbers(SSL *s, int rw);
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/*****************************************************************************
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* *
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* The following functions are private to the record layer. They should not *
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* be used outside of the record layer. *
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* *
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*****************************************************************************/
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__owur int ssl3_read_n(SSL *s, int n, int max, int extend);
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__owur int ssl3_write_pending(SSL *s, int type, const unsigned char *buf,
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unsigned int len);
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int dtls1_record_replay_check(SSL *s, DTLS1_BITMAP *bitmap);
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void dtls1_record_bitmap_update(SSL *s, DTLS1_BITMAP *bitmap);
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DTLS1_BITMAP *dtls1_get_bitmap(SSL *s, SSL3_RECORD *rr,
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unsigned int *is_next_epoch);
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int dtls1_process_buffered_records(SSL *s);
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int dtls1_retrieve_buffered_record(SSL *s, record_pqueue *queue);
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int dtls1_buffer_record(SSL *s, record_pqueue *q,
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unsigned char *priority);
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