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1e1edc0da6
Dynamically build DoxygenLayout.xml to get the latest layout for the current version of doxygen. Update Doxyfile.in to the Ubuntu20 version. Signed-off-by: Jon Shallow <supjps-libcoap@jpshallow.com>
62 lines
2.6 KiB
C
62 lines
2.6 KiB
C
/*******************************************************************************
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*
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* Copyright (c) 2011, 2012, 2013, 2014, 2015 Olaf Bergmann (TZI) and others.
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* All rights reserved. This program and the accompanying materials
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* are made available under the terms of the Eclipse Public License v1.0
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* and Eclipse Distribution License v. 1.0 which accompanies this distribution.
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*
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* The Eclipse Public License is available at http://www.eclipse.org/legal/epl-v10.html
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* and the Eclipse Distribution License is available at
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* http://www.eclipse.org/org/documents/edl-v10.php.
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*
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* Contributors:
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* Olaf Bergmann - initial API and implementation
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* Hauke Mehrtens - memory optimization, ECC integration
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*
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*******************************************************************************/
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#ifndef _DTLS_CCM_H_
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#define _DTLS_CCM_H_
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#include "aes/rijndael.h"
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/* implementation of Counter Mode CBC-MAC, RFC 3610 */
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#define DTLS_CCM_BLOCKSIZE 16 /**< size of hmac blocks */
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#define DTLS_CCM_MAX 16 /**< max number of bytes in digest */
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#define DTLS_CCM_NONCE_SIZE 12 /**< size of nonce */
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/**
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* Authenticates and encrypts a message using AES in CCM mode. Please
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* see also RFC 3610 for the meaning of \p M, \p L, \p lm and \p la.
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*
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* \param ctx The initialized rijndael_ctx object to be used for AES operations.
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* \param M The number of authentication octets.
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* \param L The number of bytes used to encode the message length.
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* \param nonce The nonce value to use. You must provide \c DTLS_CCM_BLOCKSIZE
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* nonce octets, although only the first \c 16 - \p L - 1 are used.
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* \param msg The message to encrypt. The first \p la octets are additional
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* authentication data that will be cleartext. Note that the
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* encryption operation modifies the contents of \p msg and adds
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* \p M bytes MAC. Therefore, the buffer must be at least
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* \p lm + \p M bytes large.
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* \param lm The actual length of \p msg.
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* \param aad A pointer to the additional authentication data (can be \c NULL if
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* \p la is zero).
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* \param la The number of additional authentication octets (may be zero).
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* \return FIXME
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*/
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long int
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dtls_ccm_encrypt_message(rijndael_ctx *ctx, size_t M, size_t L,
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const unsigned char nonce[DTLS_CCM_BLOCKSIZE],
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unsigned char *msg, size_t lm,
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const unsigned char *aad, size_t la);
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long int
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dtls_ccm_decrypt_message(rijndael_ctx *ctx, size_t M, size_t L,
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const unsigned char nonce[DTLS_CCM_BLOCKSIZE],
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unsigned char *msg, size_t lm,
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const unsigned char *aad, size_t la);
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#endif /* _DTLS_CCM_H_ */
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