crypto_hmac.h

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// Copyright (C) 2011-2017 Internet Systems Consortium, Inc. ("ISC")
//
// This Source Code Form is subject to the terms of the Mozilla Public
// License, v. 2.0. If a copy of the MPL was not distributed with this
// file, You can obtain one at http://mozilla.org/MPL/2.0/.
 
#include <util/buffer.h>
 
#include <boost/noncopyable.hpp>
 
#include <cryptolink/cryptolink.h>
 
#ifndef ISC_CRYPTO_HMAC_H
#define ISC_CRYPTO_HMAC_H
 
namespace isc {
namespace cryptolink {
 
class HMACImpl;
 
class HMAC : private boost::noncopyable {
private:
    HMAC(const void* secret, size_t secret_len,
         const HashAlgorithm hash_algorithm);
 
    friend HMAC* CryptoLink::createHMAC(const void*, size_t,
                                        const HashAlgorithm);
 
public:
    ~HMAC();
 
    HashAlgorithm getHashAlgorithm() const;
 
    size_t getOutputLength() const;
 
    void update(const void* data, const size_t len);
 
    void sign(isc::util::OutputBuffer& result, size_t len);
 
    void sign(void* result, size_t len);
 
    std::vector<uint8_t> sign(size_t len);
 
    bool verify(const void* sig, size_t len);
 
private:
    HMACImpl* impl_;
};
 
void signHMAC(const void* data,
              const size_t data_len,
              const void* secret,
              size_t secret_len,
              const HashAlgorithm hash_algorithm,
              isc::util::OutputBuffer& result,
              size_t len = 0);
 
bool verifyHMAC(const void* data,
                const size_t data_len,
                const void* secret,
                size_t secret_len,
                const HashAlgorithm hash_algorithm,
                const void* sig,
                const size_t sig_len);
 
void deleteHMAC(HMAC* hmac);
 
} // namespace cryptolink
} // namespace isc
 
#endif // ISC_CRYPTO_HMAC_H