Update libsrtp to version 2.0

srtp/crypto/include/auth.h

-/*
- * auth.h
- *
- * common interface to authentication functions
- *
- * David A. McGrew
- * Cisco Systems, Inc.
- */
-
-/*
- *      
- * Copyright (c) 2001-2006, Cisco Systems, Inc.
- * All rights reserved.
- * 
- * Redistribution and use in source and binary forms, with or without
- * modification, are permitted provided that the following conditions
- * are met:
- * 
- *   Redistributions of source code must retain the above copyright
- *   notice, this list of conditions and the following disclaimer.
- * 
- *   Redistributions in binary form must reproduce the above
- *   copyright notice, this list of conditions and the following
- *   disclaimer in the documentation and/or other materials provided
- *   with the distribution.
- * 
- *   Neither the name of the Cisco Systems, Inc. nor the names of its
- *   contributors may be used to endorse or promote products derived
- *   from this software without specific prior written permission.
- * 
- * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
- * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
- * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS
- * FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE
- * COPYRIGHT HOLDERS OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT,
- * INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
- * (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
- * SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
- * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
- * STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
- * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED
- * OF THE POSSIBILITY OF SUCH DAMAGE.
- *
- */
-
-#ifndef AUTH_H
-#define AUTH_H
-
-#include "datatypes.h"          
-#include "err.h"                /* error codes    */
-#include "crypto.h"             /* for auth_type_id_t */
-#include "crypto_types.h"       /* for values of auth_type_id_t */
-
-typedef struct auth_type_t *auth_type_pointer;
-typedef struct auth_t      *auth_pointer_t;
-
-typedef err_status_t (*auth_alloc_func)
-     (auth_pointer_t *ap, int key_len, int out_len);
-
-typedef err_status_t (*auth_init_func)
-     (void *state, const uint8_t *key, int key_len);
-
-typedef err_status_t (*auth_dealloc_func)(auth_pointer_t ap);
-
-typedef err_status_t (*auth_compute_func)
-     (void *state, uint8_t *buffer, int octets_to_auth, 
-      int tag_len, uint8_t *tag);
-
-typedef err_status_t (*auth_update_func)
-     (void *state, uint8_t *buffer, int octets_to_auth);
-
-typedef err_status_t (*auth_start_func)(void *state);
-     
-/* some syntactic sugar on these function types */
-
-#define auth_type_alloc(at, a, klen, outlen)                        \
-                 ((at)->alloc((a), (klen), (outlen)))
-
-#define auth_init(a, key)                                           \
-                 (((a)->type)->init((a)->state, (key), ((a)->key_len)))
-
-#define auth_compute(a, buf, len, res)                              \
-       (((a)->type)->compute((a)->state, (buf), (len), (a)->out_len, (res)))
-
-#define auth_update(a, buf, len)                                    \
-       (((a)->type)->update((a)->state, (buf), (len)))
-
-#define auth_start(a)(((a)->type)->start((a)->state))
-
-#define auth_dealloc(c) (((c)->type)->dealloc(c))
-
-/* functions to get information about a particular auth_t */
-
-int
-auth_get_key_length(const struct auth_t *a);
-
-int
-auth_get_tag_length(const struct auth_t *a);
-
-int
-auth_get_prefix_length(const struct auth_t *a);
-
-/*
- * auth_test_case_t is a (list of) key/message/tag values that are
- * known to be correct for a particular cipher.  this data can be used
- * to test an implementation in an on-the-fly self test of the
- * correcness of the implementation.  (see the auth_type_self_test()
- * function below)
- */
-
-typedef struct auth_test_case_t {
-  int key_length_octets;                    /* octets in key            */
-  uint8_t *key;                             /* key                      */
-  int data_length_octets;                   /* octets in data           */ 
-  uint8_t *data;                            /* data                     */
-  int tag_length_octets;                    /* octets in tag            */
-  uint8_t *tag;                             /* tag                      */
-  struct auth_test_case_t *next_test_case;  /* pointer to next testcase */
-} auth_test_case_t;
-
-/* auth_type_t */
-
-typedef struct auth_type_t {
-  auth_alloc_func      alloc;
-  auth_dealloc_func    dealloc;
-  auth_init_func       init;
-  auth_compute_func    compute;
-  auth_update_func     update;
-  auth_start_func      start;
-  char                *description;
-  int                  ref_count;
-  auth_test_case_t    *test_data;
-  debug_module_t      *debug;
-  auth_type_id_t       id;
-} auth_type_t;
-
-typedef struct auth_t {
-  auth_type_t *type;
-  void        *state;                   
-  int          out_len;           /* length of output tag in octets */
-  int          key_len;           /* length of key in octets        */
-  int          prefix_len;        /* length of keystream prefix     */
-} auth_t;
-
-/* 
- * auth_type_self_test() tests an auth_type against test cases
- * provided in an array of values of key/message/tag that is known to
- * be good
- */
-
-err_status_t
-auth_type_self_test(const auth_type_t *at);
-
-/* 
- * auth_type_test() tests an auth_type against external test cases
- * provided in an array of values of key/message/tag that is known to
- * be good
- */
-
-err_status_t
-auth_type_test(const auth_type_t *at, const auth_test_case_t *test_data);
-
-/*
- * auth_type_get_ref_count(at) returns the reference count (the number
- * of instantiations) of the auth_type_t at
- */
-
-int
-auth_type_get_ref_count(const auth_type_t *at);
-
-#endif /* AUTH_H */