/usr/include/srtp/crypto_types.h is in libsrtp0-dev 1.4.5~20130609~dfsg-2ubuntu1.
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* crypto_types.h
*
* constants for cipher types and auth func types
*
* 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 CRYPTO_TYPES_H
#define CRYPTO_TYPES_H
/**
* @defgroup Algos Cryptographic Algorithms
*
*
* This library provides several different cryptographic algorithms,
* each of which can be selected by using the cipher_type_id_t and
* auth_type_id_t. These algorithms are documented below.
*
* Authentication functions that use the Universal Security Transform
* (UST) must be used in conjunction with a cipher other than the null
* cipher. These functions require a per-message pseudorandom input
* that is generated by the cipher.
*
* The identifiers STRONGHOLD_AUTH and STRONGHOLD_CIPHER identify the
* strongest available authentication function and cipher,
* respectively. They are resolved at compile time to the strongest
* available algorithm. The stronghold algorithms can serve as did
* the keep of a medieval fortification; they provide the strongest
* defense (or the last refuge).
*
* @{
*/
/**
* @defgroup Ciphers Cipher Types
*
* @brief Each cipher type is identified by an unsigned integer. The
* cipher types available in this edition of libSRTP are given
* by the #defines below.
*
* A cipher_type_id_t is an identifier for a cipher_type; only values
* given by the #defines above (or those present in the file
* crypto_types.h) should be used.
*
* The identifier STRONGHOLD_CIPHER indicates the strongest available
* cipher, allowing an application to choose the strongest available
* algorithm without any advance knowledge about the avaliable
* algorithms.
*
* @{
*/
/**
* @brief The null cipher performs no encryption.
*
* The NULL_CIPHER leaves its inputs unaltered, during both the
* encryption and decryption operations. This cipher can be chosen
* to indicate that no encryption is to be performed.
*/
#define NULL_CIPHER 0
/**
* @brief AES Integer Counter Mode (AES ICM)
*
* AES ICM is the variant of counter mode that is used by Secure RTP.
* This cipher uses a 16-, 24-, or 32-octet key concatenated with a
* 14-octet offset (or salt) value.
*/
#define AES_ICM 1
/**
* @brief AES-128 Integer Counter Mode (AES ICM)
* AES-128 ICM is a deprecated alternate name for AES ICM.
*/
#define AES_128_ICM AES_ICM
/**
* @brief SEAL 3.0
*
* SEAL is the Software-Optimized Encryption Algorithm of Coppersmith
* and Rogaway. Nota bene: this cipher is IBM proprietary.
*/
#define SEAL 2
/**
* @brief AES Cipher Block Chaining mode (AES CBC)
*
* AES CBC is the AES Cipher Block Chaining mode.
* This cipher uses a 16-, 24-, or 32-octet key.
*/
#define AES_CBC 3
/**
* @brief AES-128 Cipher Block Chaining mode (AES CBC)
*
* AES-128 CBC is a deprecated alternate name for AES CBC.
*/
#define AES_128_CBC AES_CBC
/**
* @brief Strongest available cipher.
*
* This identifier resolves to the strongest cipher type available.
*/
#define STRONGHOLD_CIPHER AES_ICM
/**
* @}
*/
/**
* @defgroup Authentication Authentication Function Types
*
* @brief Each authentication function type is identified by an
* unsigned integer. The authentication function types available in
* this edition of libSRTP are given by the #defines below.
*
* An auth_type_id_t is an identifier for an authentication function type;
* only values given by the #defines above (or those present in the
* file crypto_types.h) should be used.
*
* The identifier STRONGHOLD_AUTH indicates the strongest available
* authentication function, allowing an application to choose the
* strongest available algorithm without any advance knowledge about
* the avaliable algorithms. The stronghold algorithms can serve as
* did the keep of a medieval fortification; they provide the
* strongest defense (or the last refuge).
*
* @{
*/
/**
* @brief The null authentication function performs no authentication.
*
* The NULL_AUTH function does nothing, and can be selected to indicate
* that authentication should not be performed.
*/
#define NULL_AUTH 0
/**
* @brief UST with TMMH Version 2
*
* UST_TMMHv2 implements the Truncated Multi-Modular Hash using
* UST. This function must be used in conjunction with a cipher other
* than the null cipher.
* with a cipher.
*/
#define UST_TMMHv2 1
/**
* @brief (UST) AES-128 XORMAC
*
* UST_AES_128_XMAC implements AES-128 XORMAC, using UST. Nota bene:
* the XORMAC algorithm is IBM proprietary.
*/
#define UST_AES_128_XMAC 2
/**
* @brief HMAC-SHA1
*
* HMAC_SHA1 implements the Hash-based MAC using the NIST Secure
* Hash Algorithm version 1 (SHA1).
*/
#define HMAC_SHA1 3
/**
* @brief Strongest available authentication function.
*
* This identifier resolves to the strongest available authentication
* function.
*/
#define STRONGHOLD_AUTH HMAC_SHA1
/**
* @}
*/
/**
* @}
*/
#endif /* CRYPTO_TYPES_H */
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