37 lines
803 B
C++
37 lines
803 B
C++
/*
|
|
* 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/.
|
|
*
|
|
* Copyright 2015-2018 Danny Robson <danny@nerdcruft.net>
|
|
*/
|
|
|
|
#ifndef CRUFT_CRYPTO_HASH_HOTP_HPP
|
|
#define CRUFT_CRYPTO_HASH_HOTP_HPP
|
|
|
|
#include <cruft/util/view.hpp>
|
|
|
|
#include "hmac.hpp"
|
|
#include "sha1.hpp"
|
|
|
|
#include <cstdint>
|
|
|
|
namespace cruft::crypto::hash {
|
|
/// HMAC one-time password (RFC 4226)
|
|
class HOTP {
|
|
public:
|
|
HOTP (cruft::view<const char*> key, uint64_t counter);
|
|
|
|
unsigned value (void);
|
|
uint64_t counter (void) const;
|
|
|
|
private:
|
|
uint32_t truncate (SHA1::digest_t);
|
|
|
|
uint64_t m_counter;
|
|
HMAC<SHA1> m_hash;
|
|
};
|
|
}
|
|
|
|
#endif
|