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/*
* Copyright (c) 2011, NVIDIA CORPORATION
* 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 NVIDIA CORPORATION 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 ``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 OWNER 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.
*/
#include <iostream>
using std::cout;
using std::cerr;
using std::endl;
#include <iomanip>
using std::hex;
#include <string>
using std::string;
#include <cstdlib>
using std::exit;
#include "cryptlib.h"
using CryptoPP::Exception;
#include "cmac.h"
using CryptoPP::CMAC;
#include "aes.h"
using CryptoPP::AES;
#include "hex.h"
using CryptoPP::HexEncoder;
using CryptoPP::HexDecoder;
#include "filters.h"
using CryptoPP::StringSink;
using CryptoPP::StringSource;
using CryptoPP::HashFilter;
using CryptoPP::HashVerificationFilter;
#include "secblock.h"
using CryptoPP::SecByteBlock;
extern "C" int cmac_hash(const unsigned char *msg, int len, unsigned char *cmac_buf)
{
SecByteBlock key(NULL, AES::DEFAULT_KEYLENGTH);
string plain((const char *)msg, len);
string mac, encoded;
try {
CMAC<AES> cmac(key, key.size());
StringSource(plain, true,
new HashFilter(cmac,
new StringSink(mac)
) // HashFilter
); // StringSource
}
catch(const CryptoPP::Exception& e) {
cerr << e.what() << endl;
return 1;
}
memcpy(cmac_buf, mac.data(), mac.length());
return 0;
}
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