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-rw-r--r--srtp/crypto/include/cryptoalg.h133
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diff --git a/srtp/crypto/include/cryptoalg.h b/srtp/crypto/include/cryptoalg.h
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-/*
- * cryptoalg.h
- *
- * API for authenticated encryption crypto algorithms
- *
- * 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 CRYPTOALG_H
-#define CRYPTOALG_H
-
-#include "err.h"
-
-/**
- * @defgroup Crypto Cryptography
- *
- * Zed uses a simple interface to a cryptographic transform.
- *
- * @{
- */
-
-/**
- * @brief applies a crypto algorithm
- *
- * The function pointer cryptoalg_func_t points to a function that
- * implements a crypto transform, and provides a uniform API for
- * accessing crypto mechanisms.
- *
- * @param key location of secret key
- *
- * @param clear data to be authenticated but not encrypted
- *
- * @param clear_len length of data to be authenticated but not encrypted
- *
- * @param iv location to write the Initialization Vector (IV)
- *
- * @param protect location of the data to be encrypted and
- * authenticated (before the function call), and the ciphertext
- * and authentication tag (after the call)
- *
- * @param protected_len location of the length of the data to be
- * encrypted and authenticated (before the function call), and the
- * length of the ciphertext (after the call)
- *
- */
-
-typedef err_status_t (*cryptoalg_func_t)
- (void *key,
- const void *clear,
- unsigned clear_len,
- void *iv,
- void *protect,
- unsigned *protected_len);
-
-typedef
-err_status_t (*cryptoalg_inv_t)
- (void *key, /* location of secret key */
- const void *clear, /* data to be authenticated only */
- unsigned clear_len, /* length of data to be authenticated only */
- void *iv, /* location of iv */
- void *opaque, /* data to be decrypted and authenticated */
- unsigned *opaque_len /* location of the length of data to be
- * decrypted and authd (before and after)
- */
- );
-
-typedef struct cryptoalg_ctx_t {
- cryptoalg_func_t enc;
- cryptoalg_inv_t dec;
- unsigned key_len;
- unsigned iv_len;
- unsigned auth_tag_len;
- unsigned max_expansion;
-} cryptoalg_ctx_t;
-
-typedef cryptoalg_ctx_t *cryptoalg_t;
-
-#define cryptoalg_get_key_len(cryptoalg) ((cryptoalg)->key_len)
-
-#define cryptoalg_get_iv_len(cryptoalg) ((cryptoalg)->iv_len)
-
-#define cryptoalg_get_auth_tag_len(cryptoalg) ((cryptoalg)->auth_tag_len)
-
-int
-cryptoalg_get_id(cryptoalg_t c);
-
-cryptoalg_t
-cryptoalg_find_by_id(int id);
-
-
-/**
- * @}
- */
-
-#endif /* CRYPTOALG_H */
-
-